1// Check that we don't crash when dispatch_main calls pthread_exit which
2// quits the main thread.
3
4// RUN: %clang_tsan %s -o %t -framework Foundation
5// RUN: %env_tsan_opts=ignore_interceptors_accesses=1 %run %t 2>&1 | FileCheck %s
6
7#import <Foundation/Foundation.h>
8
9int main() {
10  fprintf(stderr,"Hello world");
11
12  dispatch_queue_t q = dispatch_queue_create("my.queue", DISPATCH_QUEUE_SERIAL);
13
14  dispatch_async(q, ^{
15    fprintf(stderr,"1");
16  });
17
18  dispatch_async(q, ^{
19    fprintf(stderr,"2");
20  });
21
22  dispatch_async(q, ^{
23    fprintf(stderr,"3");
24
25    dispatch_async(dispatch_get_main_queue(), ^{
26      fprintf(stderr,"Done.");
27      sleep(1);
28      exit(0);
29    });
30  });
31
32  dispatch_main();
33}
34
35// CHECK: Hello world
36// CHECK: Done.
37// CHECK-NOT: WARNING: ThreadSanitizer
38// CHECK-NOT: CHECK failed
39