tests/__cxa_thread_atexit_test.cpp

/*
 * Copyright (C) 2014 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include <gtest/gtest.h>

#include <stdint.h>

#include <string>

extern "C" int __cxa_thread_atexit_impl(void (*fn)(void*), void* arg, void* dso_handle);

static void thread_atexit_fn1(void* arg) {
  std::string* call_sequence = static_cast<std::string*>(arg);
  *call_sequence += "one, ";
}

static void thread_atexit_fn2(void* arg) {
  std::string* call_sequence = static_cast<std::string*>(arg);
  *call_sequence += "two, ";
}

static void thread_atexit_from_atexit(void* arg) {
  std::string* call_sequence = static_cast<std::string*>(arg);
  *call_sequence += "oops, ";
}

static void thread_atexit_fn3(void* arg) {
  __cxa_thread_atexit_impl(thread_atexit_from_atexit, arg, nullptr);
  std::string* call_sequence = static_cast<std::string*>(arg);
  *call_sequence += "three, ";
}

static void thread_atexit_fn4(void* arg) {
  std::string* call_sequence = static_cast<std::string*>(arg);
  *call_sequence += "four, ";
}

static void thread_atexit_fn5(void* arg) {
  std::string* call_sequence = static_cast<std::string*>(arg);
  *call_sequence += "five.";
}

static void* thread_main(void* arg) {
  __cxa_thread_atexit_impl(thread_atexit_fn5, arg, nullptr);
  __cxa_thread_atexit_impl(thread_atexit_fn4, arg, nullptr);
  __cxa_thread_atexit_impl(thread_atexit_fn3, arg, nullptr);
  __cxa_thread_atexit_impl(thread_atexit_fn2, arg, nullptr);
  __cxa_thread_atexit_impl(thread_atexit_fn1, arg, nullptr);
  return nullptr;
}

TEST(__cxa_thread_atexit_impl, smoke) {
  std::string atexit_call_sequence;

  pthread_t t;
  ASSERT_EQ(0, pthread_create(&t, nullptr, thread_main, &atexit_call_sequence));
  ASSERT_EQ(0, pthread_join(t, nullptr));
  ASSERT_EQ("one, two, three, oops, four, five.", atexit_call_sequence);
}