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 pthread_mutex_lock(&mtx);
9 Global++;
10 pthread_mutex_unlock(&mtx);
11 barrier_wait(&barrier);
12 return NULL;
13 }
14
Thread2(void * x)15 void *Thread2(void *x) {
16 barrier_wait(&barrier);
17 Global--;
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 T2:
25 // CHECK: Previous write of size 4 at {{.*}} by thread T1
26 // CHECK: (mutexes: write [[M1:M[0-9]+]]):
27 // CHECK: Mutex [[M1]] (0x{{.*}}) created at:
28 // CHECK: #0 pthread_mutex_init
29 // CHECK: #1 main {{.*}}mutexset2.cpp:[[@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