1*7c3d14c8STreehugger Robot// RUN: %clang_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 Robotdispatch_queue_t queue; 7*7c3d14c8STreehugger Robotdispatch_data_t data; 8*7c3d14c8STreehugger Robotdispatch_semaphore_t sem; 9*7c3d14c8STreehugger Robotconst char *path; 10*7c3d14c8STreehugger Robot 11*7c3d14c8STreehugger Robotlong my_global = 0; 12*7c3d14c8STreehugger Robot 13*7c3d14c8STreehugger Robotint main(int argc, const char *argv[]) { 14*7c3d14c8STreehugger Robot fprintf(stderr, "Hello world.\n"); 15*7c3d14c8STreehugger Robot 16*7c3d14c8STreehugger Robot queue = dispatch_queue_create("my.queue", DISPATCH_QUEUE_CONCURRENT); 17*7c3d14c8STreehugger Robot sem = dispatch_semaphore_create(0); 18*7c3d14c8STreehugger Robot NSString *ns_path = [NSTemporaryDirectory() stringByAppendingPathComponent:[NSString stringWithFormat:@"temp-gcd-io.%d", getpid()]]; 19*7c3d14c8STreehugger Robot path = ns_path.fileSystemRepresentation; 20*7c3d14c8STreehugger Robot NSData *ns_data = [NSMutableData dataWithLength:1000]; 21*7c3d14c8STreehugger Robot data = dispatch_data_create(ns_data.bytes, ns_data.length, NULL, DISPATCH_DATA_DESTRUCTOR_DEFAULT); 22*7c3d14c8STreehugger Robot 23*7c3d14c8STreehugger Robot dispatch_io_t channel = dispatch_io_create_with_path(DISPATCH_IO_STREAM, path, O_CREAT | O_WRONLY, 0666, queue, ^(int error) { }); 24*7c3d14c8STreehugger Robot if (! channel) abort(); 25*7c3d14c8STreehugger Robot dispatch_io_set_high_water(channel, 1); 26*7c3d14c8STreehugger Robot 27*7c3d14c8STreehugger Robot for (int i = 0; i < 1000; i++) { 28*7c3d14c8STreehugger Robot dispatch_io_barrier(channel, ^{ 29*7c3d14c8STreehugger Robot my_global = 42; 30*7c3d14c8STreehugger Robot }); 31*7c3d14c8STreehugger Robot } 32*7c3d14c8STreehugger Robot 33*7c3d14c8STreehugger Robot dispatch_io_barrier(channel, ^{ 34*7c3d14c8STreehugger Robot my_global = 43; 35*7c3d14c8STreehugger Robot 36*7c3d14c8STreehugger Robot dispatch_semaphore_signal(sem); 37*7c3d14c8STreehugger Robot }); 38*7c3d14c8STreehugger Robot 39*7c3d14c8STreehugger Robot dispatch_semaphore_wait(sem, DISPATCH_TIME_FOREVER); 40*7c3d14c8STreehugger Robot dispatch_io_close(channel, 0); 41*7c3d14c8STreehugger Robot 42*7c3d14c8STreehugger Robot fprintf(stderr, "Done.\n"); 43*7c3d14c8STreehugger Robot return 0; 44*7c3d14c8STreehugger Robot} 45*7c3d14c8STreehugger Robot 46*7c3d14c8STreehugger Robot// CHECK: Hello world. 47*7c3d14c8STreehugger Robot// CHECK-NOT: WARNING: ThreadSanitizer 48*7c3d14c8STreehugger Robot// CHECK: Done. 49