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