2 * mem.spin: Promela code to validate memory barriers with OOO memory.
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
18 * Copyright (c) 2009 Mathieu Desnoyers
21 /* Promela validation variables. */
28 #define get_pid() (_pid)
31 * Each process have its own data in cache. Caches are randomly updated.
32 * smp_wmb and smp_rmb forces cache updates (write and read), wmb_mb forces
36 #define DECLARE_CACHED_VAR(type, x, v) \
38 type cached_##x[NR_PROCS] = v; \
39 bit cache_dirty_##x[NR_PROCS] = 0
41 #define IS_CACHE_DIRTY(x, id) (cache_dirty_##x[id])
43 #define READ_CACHED_VAR(x) (cached_##x[get_pid()])
45 #define WRITE_CACHED_VAR(x, v) \
47 cached_##x[get_pid()] = v; \
48 cache_dirty_##x[get_pid()] = 1; \
51 #define CACHE_WRITE_TO_MEM(x, id) \
53 :: IS_CACHE_DIRTY(x, id) -> \
54 mem_##x = cached_##x[id]; \
55 cache_dirty_##x[id] = 0; \
60 #define CACHE_READ_FROM_MEM(x, id) \
62 :: !IS_CACHE_DIRTY(x, id) -> \
63 cached_##x[id] = mem_##x;\
69 * May update other caches if cache is dirty, or not.
71 #define RANDOM_CACHE_WRITE_TO_MEM(x, id)\
73 :: 1 -> CACHE_WRITE_TO_MEM(x, id); \
77 #define RANDOM_CACHE_READ_FROM_MEM(x, id)\
79 :: 1 -> CACHE_READ_FROM_MEM(x, id); \
86 CACHE_READ_FROM_MEM(alpha, get_pid());
87 CACHE_READ_FROM_MEM(beta, get_pid());
94 CACHE_WRITE_TO_MEM(alpha, get_pid());
95 CACHE_WRITE_TO_MEM(beta, get_pid());
107 /* Keep in sync manually with smp_rmb, wmp_wmb and ooo_mem */
108 DECLARE_CACHED_VAR(byte, alpha, 0);
109 DECLARE_CACHED_VAR(byte, beta, 0);
114 RANDOM_CACHE_WRITE_TO_MEM(alpha, get_pid());
115 RANDOM_CACHE_WRITE_TO_MEM(beta, get_pid());
116 RANDOM_CACHE_READ_FROM_MEM(alpha, get_pid());
117 RANDOM_CACHE_READ_FROM_MEM(beta, get_pid());
121 #define get_readerid() (get_pid())
123 byte first_read[NR_READERS];
124 byte second_read[NR_READERS];
126 active [NR_READERS] proctype test_reader()
128 assert(get_pid() < NR_PROCS);
131 first_read[get_readerid()] = READ_CACHED_VAR(beta);
137 second_read[get_readerid()] = READ_CACHED_VAR(alpha);
139 // test : [] (first_read == 6 -> <> second_read == 4)
140 assert(first_read[get_readerid()] != 6
141 || second_read[get_readerid()] == 4);
144 #define get_writerid() (get_readerid() + NR_READERS)
146 active [NR_WRITERS] proctype test_writer()
150 assert(get_pid() < NR_PROCS);
153 WRITE_CACHED_VAR(alpha, 4);
159 WRITE_CACHED_VAR(beta, 6);