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  NSLog(@"Hello world.");
12  NSLog(@"addr=%p\n", &global);
13
14  dispatch_queue_t q1 = dispatch_queue_create("my.queue1", DISPATCH_QUEUE_CONCURRENT);
15  dispatch_queue_t q2 = dispatch_queue_create("my.queue2", DISPATCH_QUEUE_SERIAL);
16
17  global = 42;
18  for (int i = 0; i < 10; i++) {
19    dispatch_async(q1, ^{
20      for (int i = 0; i < 100; i++) {
21        dispatch_sync(q2, ^{
22          global++;
23        });
24      }
25    });
26  }
27
28  dispatch_barrier_async(q1, ^{
29    dispatch_sync(dispatch_get_main_queue(), ^{
30      CFRunLoopStop(CFRunLoopGetCurrent());
31    });
32  });
33
34  CFRunLoopRun();
35  NSLog(@"Done.");
36}
37
38// CHECK: Hello world.
39// CHECK: Done.
40// CHECK-NOT: WARNING: ThreadSanitizer
41