1 | // RUN: %clangxx_tsan %s -o %t -framework Foundation -std=c++11 |
2 | // RUN: %run %t 2>&1 | FileCheck %s |
3 | |
4 | #import <Foundation/Foundation.h> |
5 | #import <libkern/OSAtomic.h> |
6 | |
7 | #include <thread> |
8 | |
9 | volatile int64_t retainCount = 0; |
10 | |
11 | long g = 0; |
12 | |
13 | void dealloc() { |
14 | g = 42; |
15 | } |
16 | |
17 | void release() { |
18 | if (OSAtomicAdd64Barrier(-1, &retainCount) == 0) { |
19 | dealloc(); |
20 | } |
21 | } |
22 | |
23 | void retain() { |
24 | OSAtomicAdd64Barrier(1, &retainCount); |
25 | } |
26 | |
27 | int main(int argc, const char * argv[]) { |
28 | fprintf(stderr, "start\n" ); |
29 | retain(); |
30 | retain(); |
31 | |
32 | std::thread t([]{ |
33 | release(); |
34 | }); |
35 | |
36 | g = 47; |
37 | |
38 | release(); |
39 | t.join(); |
40 | |
41 | fprintf(stderr, "end, g = %ld\n" , g); |
42 | |
43 | return 0; |
44 | } |
45 | |
46 | // CHECK: start |
47 | // CHECK: end, g = 42 |
48 | // CHECK-NOT: WARNING: ThreadSanitizer |
49 | |