1// RUN: %clangxx_tsan -O1 %s -o %t && %deflake %run %t | FileCheck %s
2#include "test.h"
3
4int X = 0;
5
6void MySleep() {
7  sleep(1);  // the sleep that must appear in the report
8}
9
10void *Thread(void *p) {
11  barrier_wait(&barrier);
12  MySleep();  // Assume the main thread has done the write.
13  X = 42;
14  return 0;
15}
16
17int main() {
18  barrier_init(&barrier, 2);
19  pthread_t t;
20  pthread_create(&t, 0, Thread, 0);
21  X = 43;
22  barrier_wait(&barrier);
23  pthread_join(t, 0);
24  return 0;
25}
26
27// CHECK: WARNING: ThreadSanitizer: data race
28// ...
29// CHECK:   As if synchronized via sleep:
30// CHECK-NEXT:     #0 sleep
31// CHECK-NEXT:     #1 MySleep
32// CHECK-NEXT:     #2 Thread
33