呼叫iDirectSoundBuffer8 :: play时，指示崩溃是由于读取访问违规而导致的（lfqueueput，dsound.dll内部函数）

Question

我正在研究游戏，并且在dsound.dll内偶尔观察崩溃。

这在创建iDirectSoundBuffer8音频缓冲区（在其上调用play方法）后立即发生。在这一点上，除了创建音频设备，设置合作级别，创建音频缓冲区并开始播放之外，我还没有写信给缓冲区或对声音系统做任何事情。

所有通过直接返回的值都表示成功，即使我明确查询诸如DSERR_BUFFERLOST之类的缓冲区，也没有指示错误的迹象。

这是CallStack：

Answer 1

通过消除过程来搜寻此错误后，这似乎是一个Windows/驱动程序问题。 简而与此分配互动。

我能够产生以下repro，这会使其他所有执行崩溃（尽管我的应用程序中的崩溃率低至5％）。我能够在2个PC上复制它，而另一个尝试它也能够复制的人。不过，您必须在调试器中执行此代码，因为否则您将无法正常违反访问违规而区分崩溃：

#include "dsound.h"
#include "assert.h"

//link against user32.lib, dsound.lib and dxguid.lib

LRESULT CALLBACK WindowProc(HWND handle, UINT message, WPARAM wParam, LPARAM lParam){
    return DefWindowProcW(handle, message, wParam, lParam);
}

void main(){
    VirtualAlloc(nullptr, 10llu * 1024 * 1024 * 1024 * 1024, MEM_RESERVE, PAGE_NOACCESS); //if you comment this out, it won't crash

    auto application_instance = GetModuleHandle(NULL);

    WNDCLASSEXW window_class;
    ZeroMemory(&window_class, sizeof(window_class));
    window_class.cbSize = sizeof(window_class);
    window_class.style = CS_HREDRAW|CS_VREDRAW;
    window_class.lpfnWndProc = WindowProc;
    window_class.hInstance = application_instance;
    window_class.lpszClassName = L"TEST_WINDOW_CLASS";

    if(RegisterClassExW(&window_class) == 0)
        assert(false);

    auto window_handle = CreateWindowExW(0, window_class.lpszClassName, L"smashing", WS_OVERLAPPEDWINDOW|WS_VISIBLE, CW_USEDEFAULT, CW_USEDEFAULT, 100, 100, 0, 0, application_instance, 0);

    IDirectSound8* active_device = nullptr;
    IDirectSoundBuffer8* active_buffer = nullptr;

    if(DirectSoundCreate8(NULL, &active_device, NULL) != DS_OK)
        assert(false);
    if(active_device->SetCooperativeLevel(window_handle, DSSCL_PRIORITY) != DS_OK)
        assert(false);

    WAVEFORMATEX format_description;
    format_description.wFormatTag = WAVE_FORMAT_PCM;
    format_description.nChannels = 2;
    format_description.nSamplesPerSec = 44100;
    format_description.nAvgBytesPerSec = 44100 * 4;
    format_description.nBlockAlign = 4;
    format_description.wBitsPerSample = 16;
    format_description.cbSize = 0;

    DSBUFFERDESC buffer_description;
    buffer_description.dwSize = sizeof(buffer_description);
    buffer_description.dwFlags = DSBCAPS_GETCURRENTPOSITION2;
    buffer_description.dwBufferBytes = 44100 * 4;
    buffer_description.dwReserved = 0;
    buffer_description.lpwfxFormat = &format_description;
    buffer_description.guid3DAlgorithm = DS3DALG_DEFAULT;

    LPDIRECTSOUNDBUFFER buffer_before_cast = nullptr;

    if(active_device->CreateSoundBuffer(&buffer_description, &buffer_before_cast, NULL) != DS_OK)
        assert(false);
    if(buffer_before_cast->QueryInterface(IID_IDirectSoundBuffer8, (void **)&active_buffer) != S_OK)
        assert(false);
    if(active_buffer->Play(0, 0, DSBPLAY_LOOPING) != DS_OK) //this is the place where it crashes more often than not
        assert(false);
}

我没有找到解决此问题的解决方案，并且由于没有真正的方法为了向微软报告这种错误实际上是固定的，我决定将其放在stackoverflow上，以便其他人希望不会像我那样浪费太多时间。接下来，我可能会尝试使用Wasapi。