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1// RUN: %clang_tsan %s -o %t2// RUN: %run %t 2>&1 | FileCheck %s --implicit-check-not='ThreadSanitizer'3 4#include "dispatch/dispatch.h"5 6#include <stdio.h>7 8long global;9 10int main(int argc, const char *argv[]) {11 dispatch_semaphore_t done = dispatch_semaphore_create(0);12 13 dispatch_queue_t queue =14 dispatch_queue_create("my.queue", DISPATCH_QUEUE_CONCURRENT);15 16 dispatch_source_t source =17 dispatch_source_create(DISPATCH_SOURCE_TYPE_TIMER, 0, 0, queue);18 19 dispatch_source_set_timer(source, dispatch_walltime(NULL, 0), 1e9, 5);20 21 global = 42;22 23 dispatch_source_set_cancel_handler(source, ^{24 fprintf(stderr, "global = %ld\n", global);25 26 dispatch_semaphore_signal(done);27 });28 29 dispatch_resume(source);30 dispatch_cancel(source);31 32 dispatch_semaphore_wait(done, DISPATCH_TIME_FOREVER);33 34 return 0;35}36 37// CHECK: global = 4238