1 // RUN: %clang_tsan -O1 %s -o %t && %deflake %run %t | FileCheck %s
2 
3 // pthread barriers are not available on OS X
4 // UNSUPPORTED: darwin
5 
6 #include "test.h"
7 
8 pthread_barrier_t B;
9 int Global;
10 
Thread1(void * x)11 void *Thread1(void *x) {
12   pthread_barrier_init(&B, 0, 2);
13   barrier_wait(&barrier);
14   pthread_barrier_wait(&B);
15   return NULL;
16 }
17 
Thread2(void * x)18 void *Thread2(void *x) {
19   barrier_wait(&barrier);
20   pthread_barrier_wait(&B);
21   return NULL;
22 }
23 
main()24 int main() {
25   barrier_init(&barrier, 2);
26   pthread_t t;
27   pthread_create(&t, NULL, Thread1, NULL);
28   Thread2(0);
29   pthread_join(t, NULL);
30   pthread_barrier_destroy(&B);
31   return 0;
32 }
33 
34 // CHECK:      WARNING: ThreadSanitizer: data race
35