1// RUN: %clangxx_tsan -O1 %s -o %t && TSAN_OPTIONS="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
15static void *watchdog(void *p) {
16  sleep(100);  // is not intended to exit
17  fprintf(stderr, "timed out after 100 seconds\n");
18  exit(1);
19  return 0;
20}
21
22int main() {
23  barrier_init(&barrier, 2);
24  pthread_t th1, th2;
25  pthread_create(&th1, 0, incrementer, 0);
26  pthread_create(&th2, 0, watchdog, 0);
27  for (int i = 0; i < 10; i++) {
28    switch (fork()) {
29    default:  // parent
30      while (wait(0) < 0) {}
31      fprintf(stderr, ".");
32      break;
33    case 0:  // child
34      __sync_fetch_and_add(&counter, 1);
35      exit(0);
36      break;
37    case -1:  // error
38      fprintf(stderr, "failed to fork (%d)\n", errno);
39      exit(1);
40    }
41  }
42  fprintf(stderr, "OK\n");
43}
44
45// CHECK: OK
46
47