1 // RUN: %clang_tsan %s -o %t -framework Foundation 2 // RUN: %deflake %run %t 2>&1 3 4 #import <Foundation/Foundation.h> 5 6 #import "../test.h" 7 8 long global; 9 10 int main() { 11 NSLog(@"Hello world."); 12 NSLog(@"addr=%p\n", &global); 13 barrier_init(&barrier, 2); 14 15 dispatch_queue_t q1 = dispatch_queue_create("my.queue1", DISPATCH_QUEUE_CONCURRENT); 16 dispatch_queue_t q2 = dispatch_queue_create("my.queue2", DISPATCH_QUEUE_CONCURRENT); 17 18 global = 42; 19 dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{ 20 dispatch_sync(q1, ^{ 21 global = 43; 22 barrier_wait(&barrier); 23 }); 24 }); 25 dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{ 26 dispatch_sync(q2, ^{ 27 barrier_wait(&barrier); 28 global = 44; 29 30 dispatch_sync(dispatch_get_main_queue(), ^{ 31 CFRunLoopStop(CFRunLoopGetCurrent()); 32 }); 33 }); 34 }); 35 36 CFRunLoopRun(); 37 NSLog(@"Done."); 38 } 39 40 // CHECK: Hello world. 41 // CHECK: addr=[[ADDR:0x[0-9,a-f]+]] 42 // CHECK: WARNING: ThreadSanitizer: data race 43 // CHECK: Location is global 'global' at [[ADDR]] (global_race.cc.exe+0x{{[0-9,a-f]+}}) 44 // CHECK: Done. 45
