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1 // RUN: %clangxx_tsan -O1 %s -o %t && %deflake %run %t | FileCheck %s
2 #include "test.h"
3 
4 int Global;
5 pthread_mutex_t mtx;
6 
Thread1(void * x)7 void *Thread1(void *x) {
8   barrier_wait(&barrier);
9   pthread_mutex_lock(&mtx);
10   Global++;
11   pthread_mutex_unlock(&mtx);
12   return NULL;
13 }
14 
Thread2(void * x)15 void *Thread2(void *x) {
16   Global--;
17   barrier_wait(&barrier);
18   return NULL;
19 }
20 
main()21 int main() {
22   barrier_init(&barrier, 2);
23   // CHECK: WARNING: ThreadSanitizer: data race
24   // CHECK:   Write of size 4 at {{.*}} by thread T1
25   // CHECK:                         (mutexes: write [[M1:M[0-9]+]]):
26   // CHECK:   Previous write of size 4 at {{.*}} by thread T2:
27   // CHECK:   Mutex [[M1]] (0x{{.*}}) created at:
28   // CHECK:     #0 pthread_mutex_init
29   // CHECK:     #1 main {{.*}}mutexset1.cc:[[@LINE+1]]
30   pthread_mutex_init(&mtx, 0);
31   pthread_t t[2];
32   pthread_create(&t[0], NULL, Thread1, NULL);
33   pthread_create(&t[1], NULL, Thread2, NULL);
34   pthread_join(t[0], NULL);
35   pthread_join(t[1], NULL);
36   pthread_mutex_destroy(&mtx);
37 }
38