1 // RUN: %clangxx_tsan -O1 %s -o %t && %deflake %run %t | FileCheck %s
2 #include "test.h"
3 
4 int X = 0;
5 
MySleep()6 __attribute__((noinline)) void MySleep() {
7   sleep(1);  // the sleep that must appear in the report
8 }
9 
Thread(void * p)10 void *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 
main()17 int 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