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/* 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);
}
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