1*bcaeed49SFangrui Song // RUN: %clangxx_tsan -O1 %s -o %t && %deflake %run %t | FileCheck %s
2*bcaeed49SFangrui Song #include "test.h"
3*bcaeed49SFangrui Song 
4*bcaeed49SFangrui Song int X = 0;
5*bcaeed49SFangrui Song 
Thread(void * p)6*bcaeed49SFangrui Song void *Thread(void *p) {
7*bcaeed49SFangrui Song   X = 42;
8*bcaeed49SFangrui Song   barrier_wait(&barrier);
9*bcaeed49SFangrui Song   return 0;
10*bcaeed49SFangrui Song }
11*bcaeed49SFangrui Song 
main()12*bcaeed49SFangrui Song int main() {
13*bcaeed49SFangrui Song   barrier_init(&barrier, 2);
14*bcaeed49SFangrui Song   pthread_t t;
15*bcaeed49SFangrui Song   sleep(1);  // must not appear in the report
16*bcaeed49SFangrui Song   pthread_create(&t, 0, Thread, 0);
17*bcaeed49SFangrui Song   barrier_wait(&barrier);
18*bcaeed49SFangrui Song   X = 43;
19*bcaeed49SFangrui Song   pthread_join(t, 0);
20*bcaeed49SFangrui Song   return 0;
21*bcaeed49SFangrui Song }
22*bcaeed49SFangrui Song 
23*bcaeed49SFangrui Song // CHECK: WARNING: ThreadSanitizer: data race
24*bcaeed49SFangrui Song // CHECK-NOT: As if synchronized via sleep
25