Question

我收到了崩溃转储。其中一些具有以下堆栈跟踪：

msvcr120.dll!Concurrency::details::_RegisterConcRTEventTracing() Line 240   C++
msvcr120.dll!Concurrency::details::SchedulerBase::CreateWithoutInitializing(const Concurrency::SchedulerPolicy & policy) Line 283   C++
msvcr120.dll!Concurrency::details::SchedulerBase::CreateContextFromDefaultScheduler() Line 571  C++
msvcr120.dll!Concurrency::details::SchedulerBase::CurrentContext() Line 404 C++
msvcr120.dll!Concurrency::critical_section::lock() Line 1031    C++
msvcp120.dll!mtx_do_lock(_Mtx_internal_imp_t * * mtx, const xtime * target) Line 67 C++
app.exe!vmsRaisesVaEvents::SubscribeToVaEvents(vmsConsumesVaEvents * pSubscriber) Line 14   C++
app.exe!vmsSiHtml5UiApp::MakeSureSplashCreated(CSiHtml5AppStartingSplash::SplashScreenMode ssmRequired) Line 458    C++
app.exe!vmsSiHtml5UiApp::PerformWbaPreInitializationIfRequired() Line 63    C++
app.exe!vmsSiHtml5UiApp::RunAsNonUiAuxiliaryProcess() Line 140  C++
app.exe!vmsSiApp::Run() Line 106    C++
app.exe!wWinMain(HINSTANCE__ * hInstance, HINSTANCE__ * hPrevInstance, wchar_t * lpCmdLine, int nCmdShow) Line 23   C++
[External Code] 
[Frames may be missing, no binary loaded for ntdll.dll] 
ntdll.dll!0000000076ed3021()    Unknown

我的应用程序刚刚启动并初始化。它有我的应用程序的一个线程（主线程）和其他5个由我不知道的东西创建的线程。但它们不属于我的代码。

在MakeSureSplashCreated函数中，我创建了对象。

m_spSplashMgr = std::make_shared <vmsSiHtml5AppStartingSplashMgr>

订阅其活动：

m_spSplashMgr->SubscribeToVaEvents (this);

Object派生自vmsRaisesVaEvents类以提供此功能。它的代码：

class vmsRaisesVaEvents
{
public:
    vmsRaisesVaEvents () :
        m_rasingEvents (0) {}

    virtual ~vmsRaisesVaEvents () {}

    void SubscribeToVaEvents (vmsConsumesVaEvents *pSubscriber)
    {
        std::unique_lock <std::mutex> lock (ms_events);
        wait_for_events_raising_complete (lock);
        assert (std::find (m_vSubscribers.begin (), m_vSubscribers.end (), pSubscriber) == m_vSubscribers.end ());
        m_vSubscribers.push_back (pSubscriber);
    }

    void UnsubscribeFromVaEvents (vmsConsumesVaEvents *pSubscriber)
    {
        std::unique_lock <std::mutex> lock (ms_events);
        wait_for_events_raising_complete (lock);
        auto it = std::find (m_vSubscribers.begin (), m_vSubscribers.end (), pSubscriber);
        assert (it != m_vSubscribers.end ());
        if (it != m_vSubscribers.end ())
            m_vSubscribers.erase (it);
    }

private:
    static std::mutex ms_events;
    unsigned m_rasingEvents;

protected:
    std::vector <vmsConsumesVaEvents*> m_vSubscribers;

protected:
    void wait_for_events_raising_complete (std::unique_lock <std::mutex> &lock)
    {
        for (;;)
        {
            if (!m_rasingEvents)
                return;
            lock.unlock ();
            Sleep (0);
            lock.lock ();
        }
    }

    void begin_raise_events ()
    {
        std::unique_lock <std::mutex> lock (ms_events);
        m_rasingEvents++;
    }

    void end_raise_events ()
    {
        std::unique_lock <std::mutex> lock (ms_events);
        assert (m_rasingEvents);
        m_rasingEvents--;
    }

protected:
    void RaiseEvent (unsigned nEvent, ...)
    {
        va_list args;
        va_start (args, nEvent);

        begin_raise_events ();

        for (auto it = m_vSubscribers.begin (); it != m_vSubscribers.end (); ++it)
            (*it)->onVaEvent (this, nEvent, args);

        end_raise_events ();

        va_end (args);
    }
};

__declspec(selectany) std::mutex vmsRaisesVaEvents::ms_events;

我在这行的vmsRaisesVaEvents :: SubscribeToVaEvents中崩溃了：

std::unique_lock <std::mutex> lock (ms_events);

为什么这样？唯一可疑的是：

__declspec(selectany) std::mutex vmsRaisesVaEvents::ms_events;

除此之外，所有对象必须处于良好状态（存在，未损坏等）。

VC2013：我的应用程序崩溃试图锁定互斥锁

0 个答案: