--- /dev/null
+#define read_one_is_zero (read_one == 0)
+#define read_two_is_zero (read_two == 0)
--- /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
+
+#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 -i -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 -i -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
+ */
+
+/* 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());
+ }
+}
+
+/* value 2 is uninitialized */
+byte read_one = 2;
+byte read_two = 2;
+
+active proctype test_proc_one()
+{
+ assert(get_pid() < NR_PROCS);
+
+ ooo_mem();
+ WRITE_CACHED_VAR(alpha, 1);
+ ooo_mem();
+#ifndef NO_WMB
+ smp_wmb();
+ ooo_mem();
+#endif
+#ifndef NO_RMB
+ smp_rmb();
+ ooo_mem();
+#endif
+ read_one = READ_CACHED_VAR(beta);
+ ooo_mem();
+ // test : [] (read_one == 0 -> read_two != 0)
+ // test : [] (read_two == 0 -> read_one != 0)
+ assert(!(read_one == 0 && read_two == 0));
+}
+
+active proctype test_proc_two()
+{
+ assert(get_pid() < NR_PROCS);
+
+ ooo_mem();
+ WRITE_CACHED_VAR(beta, 1);
+ ooo_mem();
+#ifndef NO_WMB
+ smp_wmb();
+ ooo_mem();
+#endif
+#ifndef NO_RMB
+ smp_rmb();
+ ooo_mem();
+#endif
+ read_two = READ_CACHED_VAR(alpha);
+ ooo_mem();
+ // 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_zero -> !read_two_is_zero)
--- /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
projects / userspace-rcu.git / commitdiff
