1// RUN: %clangxx_tsan -O1 %s -o %t && %deflake %run %t | FileCheck %s
2#include "test.h"
3#include <sys/types.h>
4#include <sys/stat.h>
5#include <fcntl.h>
6
7int fd;
8char buf;
9
10void *Thread1(void *x) {
11  buf = 1;
12  barrier_wait(&barrier);
13  return NULL;
14}
15
16void *Thread2(void *x) {
17  write(fd, &buf, 1);
18  return NULL;
19}
20
21int main() {
22  barrier_init(&barrier, 2);
23  fd = open("/dev/null", O_WRONLY);
24  if (fd < 0) return 1;
25  pthread_t t[2];
26  pthread_create(&t[0], NULL, Thread1, NULL);
27  barrier_wait(&barrier);
28  pthread_create(&t[1], NULL, Thread2, NULL);
29  pthread_join(t[0], NULL);
30  pthread_join(t[1], NULL);
31  close(fd);
32}
33
34// CHECK: WARNING: ThreadSanitizer: data race
35// CHECK:   Read of size 1
36// CHECK:     #0 write
37// CHECK:   Previous write of size 1
38// CHECK:     #0 Thread1
39