1*bcaeed49SFangrui Song // RUN: %clangxx_tsan -O1 %s -o %t && %env_tsan_opts=atexit_sleep_ms=50 %run %t 2>&1 | FileCheck %s
2*bcaeed49SFangrui Song #include "test.h"
3*bcaeed49SFangrui Song #include <errno.h>
4*bcaeed49SFangrui Song #include <sys/types.h>
5*bcaeed49SFangrui Song #include <sys/wait.h>
6*bcaeed49SFangrui Song
7*bcaeed49SFangrui Song int counter;
8*bcaeed49SFangrui Song
incrementer(void * p)9*bcaeed49SFangrui Song static void *incrementer(void *p) {
10*bcaeed49SFangrui Song for (;;)
11*bcaeed49SFangrui Song __sync_fetch_and_add(&counter, 1);
12*bcaeed49SFangrui Song return 0;
13*bcaeed49SFangrui Song }
14*bcaeed49SFangrui Song
main()15*bcaeed49SFangrui Song int main() {
16*bcaeed49SFangrui Song barrier_init(&barrier, 2);
17*bcaeed49SFangrui Song pthread_t th1;
18*bcaeed49SFangrui Song pthread_create(&th1, 0, incrementer, 0);
19*bcaeed49SFangrui Song for (int i = 0; i < 10; i++) {
20*bcaeed49SFangrui Song switch (fork()) {
21*bcaeed49SFangrui Song default: // parent
22*bcaeed49SFangrui Song while (wait(0) < 0) {}
23*bcaeed49SFangrui Song fprintf(stderr, ".");
24*bcaeed49SFangrui Song break;
25*bcaeed49SFangrui Song case 0: // child
26*bcaeed49SFangrui Song __sync_fetch_and_add(&counter, 1);
27*bcaeed49SFangrui Song exit(0);
28*bcaeed49SFangrui Song break;
29*bcaeed49SFangrui Song case -1: // error
30*bcaeed49SFangrui Song fprintf(stderr, "failed to fork (%d)\n", errno);
31*bcaeed49SFangrui Song exit(1);
32*bcaeed49SFangrui Song }
33*bcaeed49SFangrui Song }
34*bcaeed49SFangrui Song fprintf(stderr, "OK\n");
35*bcaeed49SFangrui Song }
36*bcaeed49SFangrui Song
37*bcaeed49SFangrui Song // CHECK: OK
38*bcaeed49SFangrui Song
39