1 // RUN: %clang_tsan -O1 %s -o %t && %deflake %run %t | FileCheck %s
2 
3 // on_exit() is not available on Darwin.
4 // UNSUPPORTED: darwin
5 
6 #include "test.h"
7 
8 volatile long global;
9 
10 void *thread(void *x) {
11   global++;
12   barrier_wait(&barrier);
13   return nullptr;
14 }
15 
16 void on_exit_callback(int status, void *arg) {
17   fprintf(stderr, "on_exit_callback(%d, %lu)\n", status, (long)arg);
18   global++;
19 }
20 
21 int main() {
22   on_exit(on_exit_callback, (void *)42l);
23   barrier_init(&barrier, 2);
24   pthread_t th;
25   pthread_create(&th, nullptr, thread, nullptr);
26   pthread_detach(th);
27   barrier_wait(&barrier);
28   return 2;
29 }
30 
31 // CHECK: on_exit_callback(2, 42)
32 // CHECK: WARNING: ThreadSanitizer: data race
33 // CHECK:   Write of size 8
34 // CHECK:     #0 on_exit_callback
35 // CHECK:     #1 on_exit_callback_installed_at
36 // CHECK:     #2 main
37