0905767610
I've accidentally merged the PR before addressing all comments. This patch fixes the remaining ones.
42 lines
1.3 KiB
C++
42 lines
1.3 KiB
C++
//===----------------------------------------------------------------------===//
|
|
//
|
|
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
|
|
// See https://llvm.org/LICENSE.txt for license information.
|
|
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// UNSUPPORTED: no-threads
|
|
// UNSUPPORTED: c++03
|
|
|
|
// This test uses std::atomic interfaces that are only available in C++20
|
|
// UNSUPPORTED: c++11, c++14, c++17
|
|
|
|
// Make sure that the `future` destructor keeps the data alive until the thread finished. This test fails by triggering
|
|
// TSan. It may not be observable by normal means.
|
|
|
|
// See https://github.com/llvm/llvm-project/pull/125433#issuecomment-2703618927 for more details.
|
|
|
|
#include <atomic>
|
|
#include <future>
|
|
#include <mutex>
|
|
|
|
std::mutex mux;
|
|
|
|
int main(int, char**) {
|
|
using namespace std::chrono_literals;
|
|
std::unique_lock lock(mux);
|
|
std::atomic<bool> in_async = false;
|
|
auto v = std::async(std::launch::async, [&in_async, value = 1]() mutable {
|
|
in_async = true;
|
|
in_async.notify_all();
|
|
std::scoped_lock thread_lock(mux);
|
|
value = 4;
|
|
(void)value;
|
|
});
|
|
in_async.wait(true);
|
|
lock.unlock();
|
|
|
|
return 0;
|
|
}
|