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Diffstat (limited to '')
| -rw-r--r-- | mysys/test_thr_mutex.c | 162 |
1 files changed, 162 insertions, 0 deletions
diff --git a/mysys/test_thr_mutex.c b/mysys/test_thr_mutex.c new file mode 100644 index 00000000..00b1f5f4 --- /dev/null +++ b/mysys/test_thr_mutex.c @@ -0,0 +1,162 @@ +/* Copyright (C) 2008 Sun Microsystems, Inc + + 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; version 2 of the License. + + 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335 USA */ + +/* Testing of deadlock detector */ + +#include <my_global.h> +#include <mysys_priv.h> + + +int main(int argc __attribute__((unused)), char** argv) +{ + pthread_mutex_t LOCK_A, LOCK_B, LOCK_C, LOCK_D, LOCK_E, LOCK_F, LOCK_G; + pthread_mutex_t LOCK_H, LOCK_I; + MY_INIT(argv[0]); + DBUG_ENTER("main"); + + DBUG_PUSH("d:t:O,/tmp/trace"); + printf("This program is testing the mutex deadlock detection.\n" + "It should print out different failures of wrong mutex usage" + "on stderr\n\n"); + + safe_mutex_deadlock_detector= 1; + pthread_mutex_init(&LOCK_A, MY_MUTEX_INIT_FAST); + pthread_mutex_init(&LOCK_B, MY_MUTEX_INIT_FAST); + pthread_mutex_init(&LOCK_C, MY_MUTEX_INIT_FAST); + pthread_mutex_init(&LOCK_D, MY_MUTEX_INIT_FAST); + pthread_mutex_init(&LOCK_E, MY_MUTEX_INIT_FAST); + pthread_mutex_init(&LOCK_F, MY_MUTEX_INIT_FAST); + pthread_mutex_init(&LOCK_G, MY_MUTEX_INIT_FAST); + pthread_mutex_init(&LOCK_H, MY_MUTEX_INIT_FAST); + pthread_mutex_init(&LOCK_I, MY_MUTEX_INIT_FAST); + + printf("Testing A->B and B->A\n"); + fflush(stdout); + pthread_mutex_lock(&LOCK_A); + pthread_mutex_lock(&LOCK_B); + pthread_mutex_unlock(&LOCK_A); + pthread_mutex_unlock(&LOCK_B); + + /* Test different (wrong) lock order */ + pthread_mutex_lock(&LOCK_B); + pthread_mutex_lock(&LOCK_A); /* Should give warning */ + + pthread_mutex_unlock(&LOCK_A); + pthread_mutex_unlock(&LOCK_B); + + /* Check that we don't get another warning for same lock */ + printf("Testing A->B and B->A again (should not give a warning)\n"); + pthread_mutex_lock(&LOCK_B); + pthread_mutex_lock(&LOCK_A); + pthread_mutex_unlock(&LOCK_A); + pthread_mutex_unlock(&LOCK_B); + + /* + Test of ring with many mutex + We also unlock mutex in different orders to get the unlock code properly + tested. + */ + printf("Testing A->C and C->D and D->A\n"); + pthread_mutex_lock(&LOCK_A); + pthread_mutex_lock(&LOCK_C); + pthread_mutex_unlock(&LOCK_A); + pthread_mutex_unlock(&LOCK_C); + pthread_mutex_lock(&LOCK_C); + pthread_mutex_lock(&LOCK_D); + pthread_mutex_unlock(&LOCK_D); + pthread_mutex_unlock(&LOCK_C); + + pthread_mutex_lock(&LOCK_D); + pthread_mutex_lock(&LOCK_A); /* Should give warning */ + + pthread_mutex_unlock(&LOCK_A); + pthread_mutex_unlock(&LOCK_D); + + printf("Testing E -> F ; H -> I ; F -> H ; H -> I -> E\n"); + fflush(stdout); + + pthread_mutex_lock(&LOCK_E); + pthread_mutex_lock(&LOCK_F); + pthread_mutex_unlock(&LOCK_E); + pthread_mutex_unlock(&LOCK_F); + pthread_mutex_lock(&LOCK_H); + pthread_mutex_lock(&LOCK_I); + pthread_mutex_unlock(&LOCK_I); + pthread_mutex_unlock(&LOCK_H); + pthread_mutex_lock(&LOCK_F); + pthread_mutex_lock(&LOCK_H); + pthread_mutex_unlock(&LOCK_H); + pthread_mutex_unlock(&LOCK_F); + + pthread_mutex_lock(&LOCK_H); + pthread_mutex_lock(&LOCK_I); + pthread_mutex_lock(&LOCK_E); /* Should give warning */ + + pthread_mutex_unlock(&LOCK_E); + pthread_mutex_unlock(&LOCK_I); + pthread_mutex_unlock(&LOCK_H); + + printf("\nFollowing shouldn't give any warnings\n"); + printf("Testing A->B and B->A without deadlock detection\n"); + fflush(stdout); + + /* Reinitialize mutex to get rid of old wrong usage markers */ + pthread_mutex_destroy(&LOCK_A); + pthread_mutex_destroy(&LOCK_B); + pthread_mutex_init(&LOCK_A, MY_MUTEX_INIT_FAST); + pthread_mutex_init(&LOCK_B, MY_MUTEX_INIT_FAST); + + /* Start testing */ + my_pthread_mutex_lock(&LOCK_A, MYF(MYF_NO_DEADLOCK_DETECTION)); + pthread_mutex_lock(&LOCK_B); + pthread_mutex_unlock(&LOCK_A); + pthread_mutex_unlock(&LOCK_B); + + pthread_mutex_lock(&LOCK_A); + my_pthread_mutex_lock(&LOCK_B, MYF(MYF_NO_DEADLOCK_DETECTION)); + pthread_mutex_unlock(&LOCK_A); + pthread_mutex_unlock(&LOCK_B); + + printf("Testing A -> C ; B -> C ; A->B\n"); + fflush(stdout); + pthread_mutex_lock(&LOCK_A); + pthread_mutex_lock(&LOCK_C); + pthread_mutex_unlock(&LOCK_C); + pthread_mutex_unlock(&LOCK_A); + + pthread_mutex_lock(&LOCK_B); + pthread_mutex_lock(&LOCK_C); + pthread_mutex_unlock(&LOCK_C); + pthread_mutex_unlock(&LOCK_B); + + pthread_mutex_lock(&LOCK_A); + pthread_mutex_lock(&LOCK_B); + pthread_mutex_unlock(&LOCK_B); + pthread_mutex_unlock(&LOCK_A); + + /* Cleanup */ + pthread_mutex_destroy(&LOCK_A); + pthread_mutex_destroy(&LOCK_B); + pthread_mutex_destroy(&LOCK_C); + pthread_mutex_destroy(&LOCK_D); + pthread_mutex_destroy(&LOCK_E); + pthread_mutex_destroy(&LOCK_F); + pthread_mutex_destroy(&LOCK_G); + pthread_mutex_destroy(&LOCK_H); + pthread_mutex_destroy(&LOCK_I); + + my_end(MY_DONT_FREE_DBUG); + exit(0); +} |