1 // RUN: %clangxx_tsan -O1 %s -o %t && %deflake %run %t | FileCheck %s
2 #include "test.h"
3
4 int Global;
5
Thread1(void * x)6 void *Thread1(void *x) {
7 barrier_wait(&barrier);
8 __atomic_fetch_add(&Global, 1, __ATOMIC_RELAXED);
9 return NULL;
10 }
11
Thread2(void * x)12 void *Thread2(void *x) {
13 Global++;
14 barrier_wait(&barrier);
15 return NULL;
16 }
17
main()18 int main() {
19 barrier_init(&barrier, 2);
20 pthread_t t[2];
21 pthread_create(&t[0], NULL, Thread1, NULL);
22 pthread_create(&t[1], NULL, Thread2, NULL);
23 pthread_join(t[0], NULL);
24 pthread_join(t[1], NULL);
25 }
26
27 // CHECK: WARNING: ThreadSanitizer: data race
28 // CHECK: Atomic write of size 4
29 // CHECK: #0 __tsan_atomic32_fetch_add
30 // CHECK: #1 Thread1
31