1//===----------------------------------------------------------------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8//
9// Windows cannot detect the deadlock. Instead of throwing system_error,
10// it would dead lock the test
11// UNSUPPORTED: windows
12
13// TSAN bug: https://github.com/llvm/llvm-project/issues/66537
14// UNSUPPORTED: tsan
15
16// UNSUPPORTED: no-threads
17// UNSUPPORTED: no-exceptions
18// UNSUPPORTED: libcpp-has-no-experimental-stop_token
19// UNSUPPORTED: c++03, c++11, c++14, c++17
20// XFAIL: availability-synchronization_library-missing
21
22// void join();
23
24#include <atomic>
25#include <cassert>
26#include <chrono>
27#include <concepts>
28#include <functional>
29#include <system_error>
30#include <thread>
31#include <type_traits>
32#include <vector>
33
34#include "make_test_thread.h"
35#include "test_macros.h"
36
37int main(int, char**) {
38 // resource_deadlock_would_occur - if deadlock is detected or get_id() == this_thread::get_id().
39 {
40 std::function<void()> f;
41 std::atomic_bool start = false;
42 std::atomic_bool done = false;
43
44 std::jthread jt = support::make_test_jthread([&] {
45 start.wait(false);
46 f();
47 done = true;
48 done.notify_all();
49 });
50
51 f = [&] {
52 try {
53 jt.join();
54 assert(false);
55 } catch (const std::system_error& err) {
56 assert(err.code() == std::errc::resource_deadlock_would_occur);
57 }
58 };
59 start = true;
60 start.notify_all();
61 done.wait(false);
62 }
63
64 return 0;
65}
66

source code of libcxx/test/std/thread/thread.jthread/join.deadlock.pass.cpp