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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 "../test.h"7 8long global;9 10int main() {11 fprintf(stderr, "Hello world.\n");12 dispatch_semaphore_t done = dispatch_semaphore_create(0);13 barrier_init(&barrier, 2);14 15 dispatch_queue_t q = dispatch_queue_create("my.queue", DISPATCH_QUEUE_CONCURRENT);16 dispatch_queue_t bgq = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0);17 18 dispatch_async(bgq, ^{19 dispatch_sync(q, ^{20 global = 42;21 });22 barrier_wait(&barrier);23 });24 25 dispatch_async(bgq, ^{26 barrier_wait(&barrier);27 dispatch_barrier_sync(q, ^{28 global = 43;29 });30 31 dispatch_async(bgq, ^{32 barrier_wait(&barrier);33 global = 44;34 });35 36 barrier_wait(&barrier);37 38 dispatch_semaphore_signal(done);39 });40 41 dispatch_semaphore_wait(done, DISPATCH_TIME_FOREVER);42 fprintf(stderr, "Done.\n");43}44 45// CHECK: Hello world.46// CHECK: Done.47