1*7c3d14c8STreehugger Robot// RUN: %clangxx_tsan %s -o %t -framework Foundation 2*7c3d14c8STreehugger Robot// RUN: %env_tsan_opts=ignore_interceptors_accesses=1 %run %t 2>&1 | FileCheck %s 3*7c3d14c8STreehugger Robot 4*7c3d14c8STreehugger Robot#import <Foundation/Foundation.h> 5*7c3d14c8STreehugger Robot 6*7c3d14c8STreehugger Robotint main() { 7*7c3d14c8STreehugger Robot fprintf(stderr, "start\n"); 8*7c3d14c8STreehugger Robot 9*7c3d14c8STreehugger Robot dispatch_queue_t background_q = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0); 10*7c3d14c8STreehugger Robot dispatch_queue_t main_q = dispatch_get_main_queue(); 11*7c3d14c8STreehugger Robot 12*7c3d14c8STreehugger Robot dispatch_async(background_q, ^{ 13*7c3d14c8STreehugger Robot __block long block_var = 0; 14*7c3d14c8STreehugger Robot 15*7c3d14c8STreehugger Robot dispatch_sync(main_q, ^{ 16*7c3d14c8STreehugger Robot block_var = 42; 17*7c3d14c8STreehugger Robot }); 18*7c3d14c8STreehugger Robot 19*7c3d14c8STreehugger Robot fprintf(stderr, "block_var = %ld\n", block_var); 20*7c3d14c8STreehugger Robot 21*7c3d14c8STreehugger Robot dispatch_sync(dispatch_get_main_queue(), ^{ 22*7c3d14c8STreehugger Robot CFRunLoopStop(CFRunLoopGetCurrent()); 23*7c3d14c8STreehugger Robot }); 24*7c3d14c8STreehugger Robot }); 25*7c3d14c8STreehugger Robot 26*7c3d14c8STreehugger Robot CFRunLoopRun(); 27*7c3d14c8STreehugger Robot fprintf(stderr, "done\n"); 28*7c3d14c8STreehugger Robot} 29*7c3d14c8STreehugger Robot 30*7c3d14c8STreehugger Robot// CHECK: start 31*7c3d14c8STreehugger Robot// CHECK: block_var = 42 32*7c3d14c8STreehugger Robot// CHECK: done 33*7c3d14c8STreehugger Robot// CHECK-NOT: WARNING: ThreadSanitizer 34*7c3d14c8STreehugger Robot// CHECK-NOT: CHECK failed 35