1// RUN: %clangxx_tsan -O1 %s -o %t && %env_tsan_opts=atexit_sleep_ms=50 %run %t 2>&1 | FileCheck %s
2#include "test.h"
3#include <errno.h>
4#include <sys/types.h>
5#include <sys/wait.h>
6
7int counter;
8
9static void *incrementer(void *p) {
10  for (;;)
11    __sync_fetch_and_add(&counter, 1);
12  return 0;
13}
14
15int main() {
16  barrier_init(&barrier, 2);
17  pthread_t th1;
18  pthread_create(&th1, 0, incrementer, 0);
19  for (int i = 0; i < 10; i++) {
20    switch (fork()) {
21    default:  // parent
22      while (wait(0) < 0) {}
23      fprintf(stderr, ".");
24      break;
25    case 0:  // child
26      __sync_fetch_and_add(&counter, 1);
27      exit(0);
28      break;
29    case -1:  // error
30      fprintf(stderr, "failed to fork (%d)\n", errno);
31      exit(1);
32    }
33  }
34  fprintf(stderr, "OK\n");
35}
36
37// CHECK: OK
38
39