38 lines · c
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() {11 fprintf(stderr, "Hello world.\n");12 dispatch_semaphore_t done = dispatch_semaphore_create(0);13 14 dispatch_queue_t q1 = dispatch_queue_create("my.queue1", DISPATCH_QUEUE_CONCURRENT);15 dispatch_queue_t q2 = dispatch_queue_create("my.queue2", DISPATCH_QUEUE_SERIAL);16 17 global = 42;18 for (int i = 0; i < 10; i++) {19 dispatch_async(q1, ^{20 for (int i = 0; i < 100; i++) {21 dispatch_sync(q2, ^{22 global++;23 });24 }25 });26 }27 28 dispatch_barrier_async(q1, ^{29 dispatch_semaphore_signal(done);30 });31 32 dispatch_semaphore_wait(done, DISPATCH_TIME_FOREVER);33 fprintf(stderr, "Done.\n");34}35 36// CHECK: Hello world.37// CHECK: Done.38