1// RUN: %clangxx_tsan -O1 %s -o %t && %deflake %run %t | FileCheck %s
2#include "test.h"
3
4int Global;
5pthread_mutex_t mtx;
6
7void *Thread1(void *x) {
8  barrier_wait(&barrier);
9  pthread_mutex_lock(&mtx);
10  Global++;
11  pthread_mutex_unlock(&mtx);
12  return NULL;
13}
14
15void *Thread2(void *x) {
16  Global--;
17  barrier_wait(&barrier);
18  return NULL;
19}
20
21int 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