brintos

brintos / llvm-project-archived public Read only

0
0
Text · 874 B · e8f1e28 Raw
36 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#include <assert.h>8 9int main() {10  fprintf(stderr, "start\n");11  dispatch_semaphore_t done = dispatch_semaphore_create(0);12 13  dispatch_queue_t background_q = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0);14  dispatch_queue_t serial_q = dispatch_queue_create("my.queue", DISPATCH_QUEUE_SERIAL);15  assert(background_q != serial_q);16 17  dispatch_async(background_q, ^{18    __block long block_var = 0;19 20    dispatch_sync(serial_q, ^{21      block_var = 42;22    });23 24    fprintf(stderr, "block_var = %ld\n", block_var);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: start34// CHECK: block_var = 4235// CHECK: done36