1// RUN: %clang_tsan %s -o %t -framework Foundation
2// RUN: %env_tsan_opts=ignore_interceptors_accesses=1 %deflake %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  print_address("addr=", 1, &global);
13  barrier_init(&barrier, 2);
14
15  global = 42;
16  dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
17    global = 43;
18    barrier_wait(&barrier);
19  });
20
21  dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
22    barrier_wait(&barrier);
23    global = 44;
24
25    dispatch_sync(dispatch_get_main_queue(), ^{
26      CFRunLoopStop(CFRunLoopGetCurrent());
27    });
28  });
29
30  CFRunLoopRun();
31  NSLog(@"Done.");
32}
33
34// CHECK: Hello world.
35// CHECK: addr=[[ADDR:0x[0-9,a-f]+]]
36// CHECK: WARNING: ThreadSanitizer: data race
37// CHECK: Location is global 'global' {{(of size 8 )?}}at [[ADDR]] (gcd-async-race.mm.tmp+0x{{[0-9,a-f]+}})
38// CHECK: Done.
39