38 lines · c
1// RUN: %clang_tsan %s -o %t2// RUN: %deflake %run %t 2>&1 | FileCheck %s3 4#include "dispatch/dispatch.h"5 6#include "../test.h"7 8long global;9 10int main() {11 fprintf(stderr, "Hello world.\n");12 print_address("addr=", 1, &global);13 dispatch_semaphore_t done = dispatch_semaphore_create(0);14 barrier_init(&barrier, 2);15 16 global = 42;17 dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{18 global = 43;19 barrier_wait(&barrier);20 });21 22 dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{23 barrier_wait(&barrier);24 global = 44;25 26 dispatch_semaphore_signal(done);27 });28 29 dispatch_semaphore_wait(done, DISPATCH_TIME_FOREVER);30 fprintf(stderr, "Done.\n");31}32 33// CHECK: Hello world.34// CHECK: addr=[[ADDR:0x[0-9,a-f]+]]35// CHECK: WARNING: ThreadSanitizer: data race36// CHECK: Location is global 'global' {{(of size 8 )?}}at [[ADDR]] (async-race.c.tmp+0x{{[0-9,a-f]+}})37// CHECK: Done.38