1// RUN: %clang_tsan %s -o %t -framework Foundation
2// RUN: %env_tsan_opts=ignore_interceptors_accesses=1 %run %t 2>&1 | FileCheck %s
3
4#import <Foundation/Foundation.h>
5
6#import "../test.h"
7
8long global;
9
10int main() {
11  fprintf(stderr, "Hello world.\n");
12  print_address("addr=", 1, &global);
13  barrier_init(&barrier, 2);
14
15  dispatch_queue_t q = dispatch_queue_create("my.queue", DISPATCH_QUEUE_CONCURRENT);
16  dispatch_queue_t bgq = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0);
17
18  dispatch_async(bgq, ^{
19    dispatch_sync(q, ^{
20      global = 42;
21    });
22    barrier_wait(&barrier);
23  });
24
25  dispatch_async(bgq, ^{
26    barrier_wait(&barrier);
27    dispatch_barrier_sync(q, ^{
28      global = 43;
29    });
30
31    dispatch_async(bgq, ^{
32      barrier_wait(&barrier);
33      global = 44;
34    });
35
36    barrier_wait(&barrier);
37
38    dispatch_sync(dispatch_get_main_queue(), ^{
39      CFRunLoopStop(CFRunLoopGetCurrent());
40    });
41  });
42
43  CFRunLoopRun();
44  fprintf(stderr, "Done.\n");
45}
46
47// CHECK: Hello world.
48// CHECK: Done.
49// CHECK-NOT: WARNING: ThreadSanitizer
50