1// RUN: %clangxx_tsan %s -o %t -framework Foundation -fobjc-arc
2// RUN: %run %t 2>&1 | FileCheck %s
3
4#import <Foundation/Foundation.h>
5
6int main() {
7  @autoreleasepool {
8    NSObject* obj1 = [NSObject new];
9    NSObject* obj2 = [NSObject new];
10
11    @synchronized(obj1) {
12      @synchronized(obj1) {
13        NSLog(@"nested 1-1");
14// CHECK: nested 1-1
15      }
16    }
17
18    @synchronized(obj1) {
19      @synchronized(obj2) {
20        @synchronized(obj1) {
21          @synchronized(obj2) {
22            NSLog(@"nested 1-2-1-2");
23// CHECK: nested 1-2-1-2
24          }
25        }
26      }
27    }
28
29  }
30
31  NSLog(@"PASS");
32// CHECK-NOT: ThreadSanitizer
33// CHECK: PASS
34  return 0;
35}
36