blob: 0c09a7bb7590a17bd3b5243b055411517c041bcc (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
|
/*
* Test program that triggers a race between pthread_barrier_wait() and
* pthread_barrier_destroy(): proper synchronization is missing between
* the pthread_barrier_wait() and the pthread_barrier_destroy() calls. This
* test program is based on the example that was posted on February 5, 2009 by
* Christoph Bartoschek on the valgrind-users mailing list. Redistribution of
* the source code below is permitted under the GPLv2 license.
*
* See also http://article.gmane.org/gmane.comp.debugging.valgrind/8945/match=pthread_barrier_wait
*/
#include <pthread.h>
#include <stdlib.h>
static pthread_barrier_t* barrier;
static void* thread(void* arg)
{
pthread_barrier_wait(barrier);
return NULL;
}
int main()
{
pthread_t tid;
barrier = (pthread_barrier_t *) malloc(sizeof(*barrier));
pthread_barrier_init(barrier, NULL, 2);
pthread_create(&tid, NULL, thread, NULL);
pthread_barrier_wait(barrier);
/*
* The sleep() call below ensures that the pthread_barrier_destroy() call
* happens after the created thread has returned from pthread_barrier_wait().
*/
sleep(1);
pthread_barrier_destroy(barrier);
free(barrier);
pthread_join(tid, NULL);
return 0;
}
|
