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