1// RUN: %clangxx_tsan -O1 %s -o %t && %deflake %run %t | FileCheck %s
2#include <pthread.h>
3#include <unistd.h>
4
5volatile int X;
6
7void *Thread1(void *x) {
8  sleep(1);
9  X = 42;
10  X = 66;
11  X = 78;
12  return 0;
13}
14
15void *Thread2(void *x) {
16  X = 11;
17  X = 99;
18  X = 73;
19  return 0;
20}
21
22int main() {
23  pthread_t t;
24  pthread_create(&t, 0, Thread1, 0);
25  Thread2(0);
26  pthread_join(t, 0);
27}
28
29// CHECK: ThreadSanitizer: reported 1 warnings
30