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https://github.com/ioacademy-jikim/debugging
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49 lines
1.2 KiB
C
49 lines
1.2 KiB
C
/*
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* Test program that triggers a race between pthread_barrier_wait() and
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* pthread_barrier_destroy(): proper synchronization is missing between
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* the pthread_barrier_wait() and the pthread_barrier_destroy() calls. This
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* test program is based on the example that was posted on February 5, 2009 by
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* Christoph Bartoschek on the valgrind-users mailing list. Redistribution of
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* the source code below is permitted under the GPLv2 license.
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*
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* See also http://article.gmane.org/gmane.comp.debugging.valgrind/8945/match=pthread_barrier_wait
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*/
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#define _GNU_SOURCE
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#include <pthread.h>
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#include <stdlib.h>
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#include <unistd.h>
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static pthread_barrier_t* barrier;
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static void* thread(void* arg)
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{
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pthread_barrier_wait(barrier);
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return NULL;
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}
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int main()
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{
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pthread_t tid;
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barrier = (pthread_barrier_t *) malloc(sizeof(*barrier));
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pthread_barrier_init(barrier, NULL, 2);
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pthread_create(&tid, NULL, thread, NULL);
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pthread_barrier_wait(barrier);
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/*
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* The sleep() call below ensures that the pthread_barrier_destroy() call
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* happens after the created thread has returned from pthread_barrier_wait().
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*/
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sleep(1);
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pthread_barrier_destroy(barrier);
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free(barrier);
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pthread_join(tid, NULL);
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return 0;
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}
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