首页 > 解决方案 > Boost::Asio io_context::run 未知的 Visual C++ 运行时错误:调试错误

问题描述

升压版本:1.68

C++ 标准:C++17

开发平台:MSVC 2017

操作系统:Windows 10 专业版

电脑架构:x64

我正在使用 Boost::Asio 创建异步 TCP 连接。在第一次成功连接期间,一切正常。由于某些问题,它的套接字中断它尝试重新连接,那时我得到了运行时错误。即使我得到运行时错误,程序仍然能够接收数据。

起初我试图在我的主函数的while(无限)循环(主线程)中重新连接套接字,但我得到了错误。我遇到了错误

D:\vcpkg\installed\x64-windows\include\boost\asio\detail\impl\win_iocp_io_context.ipp

size_t win_iocp_io_context::run(boost::system::error_code& ec)
{
  if (::InterlockedExchangeAdd(&outstanding_work_, 0) == 0)
  {
    stop();
    ec = boost::system::error_code();
    return 0;
  }

  win_iocp_thread_info this_thread;
  thread_call_stack::context ctx(this, this_thread);

  size_t n = 0;
  while (do_one(INFINITE, ec))
    if (n != (std::numeric_limits<size_t>::max)())
      ++n;
  return n;
}

当 n = 13 时在线

while (do_one(INFINITE, ec))

一旦检测到连接断开或套接字关闭,我通过在我的接收和发送处理程序中添加我的连接调用来解决该错误。

有人可以解释为什么我在尝试从主线程重新连接时遇到这个问题,并且当我在 io_context 线程中的套接字被破坏后立即尝试重新连接时问题得到了解决。

在连接丢失并且 io_context 线程退出后,我在调用 run 之前确实重新启动了上下文。

在我的主要功能中循环:

while (true)
{
    fmt::print("Socket Alive : {}\n", as.isSocketAlive());
    while(not as.isSocketAlive() and not as.isConnectionInProcess())
        as.connectSocket();
    if (not as.isSocketAlive())
        continue;
    if (as.isReadComplete())
        as.sendDataSocket(as.getRecievedData());
}   

我的异步套接字函数:

void AsyncSocket::runContext(void)
{
    std::atomic_store(std::addressof(this->contextExitted), false);
    this->context.run();
    std::atomic_store(std::addressof(this->contextExitted), true);
}

void AsyncSocket::restartContext(void)
{
    if (std::atomic_load(std::addressof(this->contextExitted)))
        this->context.restart();
}

void AsyncSocket::connectSocket(void)
{
    std::atomic_store(std::addressof(this->socketAlive), false);
    std::atomic_store(std::addressof(this->connectionInProcess), true);
    //this->socket.async_connect(this->endpoint, std::bind(&AsyncSocket::connectHandler, this, boost::asio::placeholders::error));
    this->socket.async_connect(this->endpoint, boost::bind(&AsyncSocket::connectHandler, this, boost::asio::placeholders::error));
    //this->socket.connect(this->endpoint, );
    if (this->context.stopped())
    {
        if (this->isContextExitted())
            this->restartContext();
        this->t = std::thread(&AsyncSocket::runContext, this);
    }
    std::call_once(this->firstRun, [this]() {
        t = std::thread(&AsyncSocket::runContext, this);
    });
}

void AsyncSocket::recieveHandler(const boost::system::error_code& ec, std::size_t bytes_transferred)
{
    fmt::print("In recieve handler, Error Code : {}\nBytes recieved : {}\n", ec.message(), bytes_transferred);
    try
    {
        std::atomic_store(std::addressof(this->receivingData), false);
        if (ec not_eq boost::system::errc::success)
        {
#ifdef _DEBUG
            fmt::print("Error in WebSocket::recieveHandler. Error : {0}\n", ec.message());
#endif // _DEBUG
            LOG_ERROR << ec.message();
            switch (ec.value())
            {
            case boost::asio::error::eof :
            case boost::asio::error::connection_reset :
            case boost::asio::error::connection_aborted :
            case boost::asio::error::network_reset :
            case boost::asio::error::network_down :
            case boost::asio::error::network_unreachable :
                if (this->isSocketAlive() and this->socket.is_open())
                    this->socket.close();
                std::atomic_store(std::addressof(this->socketAlive), false);
                this->connectSocket();// If I comment this line and try to reconnect in my main function (infinite while loop), I get mentioned run-time error
                return;
            default:
                break;
            }

        }
        else
        {
            this->readDataQueue.push(std::string(reinterpret_cast <const char *> (this->readDataBuffer.data()), bytes_transferred));
            std::atomic_store(std::addressof(this->readComplete), true);
        }
    }
    catch (const std::exception& ex)
    {
#ifdef _DEBUG
        fmt::print("Error in WebSocket::sendHandler. Error : {0}\n", ex.what());
#endif // _DEBUG
        LOG_ERROR << "Exception : " << ex.what() << "Data : " << this->writeDataQueue.front();
    }
    this->recieveDataSocket();
}



void AsyncSocket::sendHandler(const boost::system::error_code& ec, std::size_t bytes_transferred)
{
    fmt::print("In send handler, Error Code : {}\nBytes recieved : {}\n", ec.message(), bytes_transferred);
    try
    {
        if (ec not_eq boost::system::errc::success)
        {
#ifdef _DEBUG
            fmt::print("Error in WebSocket::recieveHandler. Error : {0}\n", ec.message());
#endif // _DEBUG
            LOG_ERROR << ec.message();
            switch (ec.value())
            {
            case boost::asio::error::eof:
            case boost::asio::error::connection_reset:
            case boost::asio::error::connection_aborted:
            case boost::asio::error::network_reset:
            case boost::asio::error::network_down:
            case boost::asio::error::network_unreachable:
                if (this->isSocketAlive() and this->socket.is_open())
                    this->socket.close();
                std::atomic_store(std::addressof(this->socketAlive), false);
                this->connectSocket();// If I comment this line and try to reconnect in my main function (infinite while loop), I get mentioned run-time error
                return;
            default:
                break;
            }

        }
        this->writeDataQueue.pop();
        std::atomic_init(std::addressof(this->sendingData), false);
        this->writeSocket();
    }
    catch (const std::exception& ex)
    {
#ifdef _DEBUG
        fmt::print("Error in WebSocket::sendHandler. Error : {0}\n", ex.what());
#endif // _DEBUG
        LOG_ERROR << "Exception : " << ex.what() << "Data : " << this->writeDataQueue.front();
    }
}

运行时错误

标签: c++boostboost-asio

解决方案


abort被称为默认操作std::terminateterminate当线程被销毁或被覆盖operator=(thread&&)并且处于可连接状态时调用。

这段代码不安全:

connectSocket() {
...
if (this->context.stopped())
{
    if (this->isContextExitted())
        this->restartContext();
    this->t = std::thread(&AsyncSocket::runContext, this); // [1]
}
std::call_once(this->firstRun, [this]() {
    t = std::thread(&AsyncSocket::runContext, this); // [2]
});

在第一次调用connectSocket行 [2] 时执行并启动线程。在第 N 次调用connectSocket时,如果context.stopped()返回 true,则您正在创建新线程并将其分配给t处于可连接状态的线程,此时terminate被调用。在移动分配之前,您应该加入t线程。


推荐阅读