libcxx/test/std/thread/thread.jthread/join.deadlock.pass.cpp

   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
  36 int 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 }