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: 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
  37 int 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 }