1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
| // RUN: %clang_tsan %s -o %t -framework Foundation
// RUN: %deflake %run %t 2>&1 | FileCheck %s
#import <Foundation/Foundation.h>
#import "../test.h"
@interface MyClass : NSObject {
long instance_variable;
}
- (void)method:(long)value;
@end
@implementation MyClass
- (void)method:(long)value {
self->instance_variable = value;
}
@end
int main() {
NSLog(@"Hello world.");
barrier_init(&barrier, 2);
MyClass *my_object = [MyClass new];
[my_object method:42];
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
[my_object method:43];
barrier_wait(&barrier);
});
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
barrier_wait(&barrier);
[my_object method:44];
dispatch_sync(dispatch_get_main_queue(), ^{
CFRunLoopStop(CFRunLoopGetCurrent());
});
});
CFRunLoopRun();
NSLog(@"Done.");
return 0;
}
// CHECK: Hello world.
// CHECK: WARNING: ThreadSanitizer: data race
// CHECK: Write of size 8
// CHECK: #0 -[MyClass method:]
// CHECK: Previous write of size 8
// CHECK: #0 -[MyClass method:]
// CHECK: Location is heap block
// CHECK: Done.
|