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  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_barrier_sync(q, ^{
19    global = 42;
20  });
21
22  dispatch_async(bgq, ^{
23    dispatch_sync(q, ^{
24      global = 43;
25      barrier_wait(&barrier);
26    });
27  });
28
29  dispatch_async(bgq, ^{
30    dispatch_sync(q, ^{
31      barrier_wait(&barrier);
32      global = 44;
33
34      dispatch_sync(dispatch_get_main_queue(), ^{
35        CFRunLoopStop(CFRunLoopGetCurrent());
36      });
37    });
38  });
39
40  CFRunLoopRun();
41  fprintf(stderr, "Done.\n");
42}
43
44// CHECK: Hello world.
45// CHECK: addr=[[ADDR:0x[0-9,a-f]+]]
46// CHECK: WARNING: ThreadSanitizer: data race
47// CHECK: Location is global 'global' {{(of size 8 )?}}at [[ADDR]] (gcd-barrier-race.mm.tmp+0x{{[0-9,a-f]+}})
48// CHECK: Done.
49