| // RUN: %clangxx_tsan %s -o %t -framework Foundation |
| // RUN: %run %t 2>&1 | FileCheck %s |
| |
| #import <Foundation/Foundation.h> |
| |
| int main() { |
| fprintf(stderr, "start\n"); |
| |
| dispatch_queue_t background_q = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0); |
| dispatch_queue_t main_q = dispatch_get_main_queue(); |
| |
| dispatch_async(background_q, ^{ |
| __block long block_var = 0; |
| |
| dispatch_sync(main_q, ^{ |
| block_var = 42; |
| }); |
| |
| fprintf(stderr, "block_var = %ld\n", block_var); |
| |
| dispatch_sync(dispatch_get_main_queue(), ^{ |
| CFRunLoopStop(CFRunLoopGetCurrent()); |
| }); |
| }); |
| |
| CFRunLoopRun(); |
| fprintf(stderr, "done\n"); |
| } |
| |
| // CHECK: start |
| // CHECK: block_var = 42 |
| // CHECK: done |
| // CHECK-NOT: WARNING: ThreadSanitizer |
| // CHECK-NOT: CHECK failed |
