1// RUN: %clang_tsan %s -o %t -framework Foundation 2// RUN: %env_tsan_opts=ignore_interceptors_accesses=1 %run %t 2>&1 | FileCheck %s 3 4#import <Foundation/Foundation.h> 5 6long my_global = 0; 7 8int main(int argc, const char *argv[]) { 9 fprintf(stderr, "Hello world.\n"); 10 11 dispatch_queue_t queue = dispatch_queue_create("my.queue", DISPATCH_QUEUE_SERIAL); 12 dispatch_semaphore_t sem = dispatch_semaphore_create(0); 13 14 NSString *path = [NSTemporaryDirectory() stringByAppendingPathComponent:[NSString stringWithFormat:@"temp-gcd-io.%d", getpid()]]; 15 16 dispatch_io_t channel = dispatch_io_create_with_path(DISPATCH_IO_STREAM, path.fileSystemRepresentation, O_CREAT | O_WRONLY, 17 0666, queue, ^(int error) { }); 18 dispatch_io_set_high_water(channel, 1); 19 20 NSData *ns_data = [NSMutableData dataWithLength:1000]; 21 dispatch_data_t data = dispatch_data_create(ns_data.bytes, ns_data.length, NULL, DISPATCH_DATA_DESTRUCTOR_DEFAULT); 22 23 my_global++; 24 dispatch_io_write(channel, 0, data, queue, ^(bool done, dispatch_data_t remainingData, int error) { 25 my_global++; 26 dispatch_async(queue, ^{ 27 my_global++; 28 if (done) { 29 dispatch_semaphore_signal(sem); 30 } 31 }); 32 }); 33 34 dispatch_semaphore_wait(sem, DISPATCH_TIME_FOREVER); 35 my_global++; 36 dispatch_io_close(channel, 0); 37 channel = dispatch_io_create_with_path(DISPATCH_IO_STREAM, path.fileSystemRepresentation, O_RDONLY, 38 0, queue, ^(int error) { }); 39 dispatch_io_set_high_water(channel, 1); 40 41 my_global++; 42 dispatch_io_read(channel, 0, SIZE_MAX, queue, ^(bool done, dispatch_data_t remainingData, int error) { 43 my_global++; 44 dispatch_async(queue, ^{ 45 my_global++; 46 if (done) { 47 dispatch_semaphore_signal(sem); 48 } 49 }); 50 }); 51 52 dispatch_semaphore_wait(sem, DISPATCH_TIME_FOREVER); 53 my_global++; 54 fprintf(stderr, "Done.\n"); 55 return 0; 56} 57 58// CHECK: Hello world. 59// CHECK-NOT: WARNING: ThreadSanitizer 60// CHECK: Done. 61