1 // RUN: %clang_tsan %s -o %t -framework Foundation 2 // RUN: %deflake %run %t 2>&1 | FileCheck %s 3 4 #import <Foundation/Foundation.h> 5 6 #import "../test.h" 7 8 @interface MyClass : NSObject { 9 long instance_variable; 10 } 11 - (void)method:(long)value; 12 @end 13 14 @implementation MyClass 15 16 - (void)method:(long)value { 17 self->instance_variable = value; 18 } 19 20 @end 21 22 int main() { 23 NSLog(@"Hello world."); 24 barrier_init(&barrier, 2); 25 26 MyClass *my_object = [MyClass new]; 27 [my_object method:42]; 28 29 dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{ 30 [my_object method:43]; 31 barrier_wait(&barrier); 32 }); 33 34 dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{ 35 barrier_wait(&barrier); 36 [my_object method:44]; 37 38 dispatch_sync(dispatch_get_main_queue(), ^{ 39 CFRunLoopStop(CFRunLoopGetCurrent()); 40 }); 41 }); 42 43 CFRunLoopRun(); 44 NSLog(@"Done."); 45 return 0; 46 } 47 48 // CHECK: Hello world. 49 // CHECK: WARNING: ThreadSanitizer: data race 50 // CHECK: Write of size 8 51 // CHECK: #0 -[MyClass method:] 52 // CHECK: Previous write of size 8 53 // CHECK: #0 -[MyClass method:] 54 // CHECK: Location is heap block 55 // CHECK: Done. 56
