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
|
// RUN: %clang_tsan %s -o %t -framework Foundation
// RUN: %deflake %run %t 2>&1 | FileCheck %s
#import <Foundation/Foundation.h>
#import "../test.h"
long global;
int main() {
fprintf(stderr, "Hello world.\n");
print_address("addr=", 1, &global);
barrier_init(&barrier, 2);
global = 42;
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
global = 43;
barrier_wait(&barrier);
});
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
barrier_wait(&barrier);
global = 44;
dispatch_sync(dispatch_get_main_queue(), ^{
CFRunLoopStop(CFRunLoopGetCurrent());
});
});
CFRunLoopRun();
fprintf(stderr, "Done.\n");
}
// CHECK: Hello world.
// CHECK: WARNING: ThreadSanitizer: data race
// CHECK: Write of size 8
// CHECK: Previous write of size 8
// CHECK: Location is global
// CHECK: Thread {{.*}} is a GCD worker thread
// CHECK-NOT: failed to restore the stack
// CHECK: Thread {{.*}} is a GCD worker thread
// CHECK-NOT: failed to restore the stack
// CHECK: Done.
|
