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: c++03, c++11, c++14, c++17
19// XFAIL: availability-synchronization_library-missing
20
21// void join();
22
23#include <atomic>
24#include <cassert>
25#include <chrono>
26#include <concepts>
27#include <functional>
28#include <system_error>
29#include <thread>
30#include <type_traits>
31#include <vector>
32
33#include "make_test_thread.h"
34#include "test_macros.h"
35
36int main(int, char**) {
37 // resource_deadlock_would_occur - if deadlock is detected or get_id() == this_thread::get_id().
38 {
39 std::function<void()> f;
40 std::atomic_bool start = false;
41 std::atomic_bool done = false;
42
43 std::jthread jt = support::make_test_jthread([&] {
44 start.wait(false);
45 f();
46 done = true;
47 done.notify_all();
48 });
49
50 f = [&] {
51 try {
52 jt.join();
53 assert(false);
54 } catch (const std::system_error& err) {
55 assert(err.code() == std::errc::resource_deadlock_would_occur);
56 }
57 };
58 start = true;
59 start.notify_all();
60 done.wait(false);
61 }
62
63 return 0;
64}
65

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