c# - 引发异常:读取访问冲突。这是0xBF13D000

我有一个莫名其妙的问题，一个曾经可以一直运行的程序现在每次重启仅能运行一次，当我再次运行它时，我被授予:

Exception thrown: read access violation. this was 0xBF13D000.

我用C导出扩展了C++项目，因此可以从C#中使用它:

C导出:

KeyFinder::AudioData* new_audio_data(const unsigned frame_rate, const unsigned channels, const unsigned samples)
{
    auto audio_data = new KeyFinder::AudioData();
    audio_data->setFrameRate(frame_rate);
    audio_data->setChannels(channels);
    audio_data->addToSampleCount(samples);
    return audio_data;
}

void audio_data_set_sample(KeyFinder::AudioData* audio_data, const unsigned index, const double value)
{
    audio_data->setSample(index, value);
}

void keyfinder_progressive_chromagram(KeyFinder::KeyFinder* key_finder, KeyFinder::AudioData* audio_data, KeyFinder::Workspace* workspace)
{
    key_finder->progressiveChromagram(*audio_data, *workspace);
}

KeyFinder::key_t keyfinder_key_of_chromagram(KeyFinder::KeyFinder* key_finder, KeyFinder::Workspace* workspace)
{
    return key_finder->keyOfChromagram(*workspace);
}

enum key_t {
    A_MAJOR = 0,
    A_MINOR,
    B_FLAT_MAJOR,
    B_FLAT_MINOR,
    B_MAJOR,
    B_MINOR = 5,
    C_MAJOR,
    C_MINOR,
    D_FLAT_MAJOR,
    D_FLAT_MINOR,
    D_MAJOR = 10,
    D_MINOR,
    E_FLAT_MAJOR,
    E_FLAT_MINOR,
    E_MAJOR,
    E_MINOR = 15,
    F_MAJOR,
    F_MINOR,
    G_FLAT_MAJOR,
    G_FLAT_MINOR,
    G_MAJOR = 20,
    G_MINOR,
    A_FLAT_MAJOR,
    A_FLAT_MINOR,
    SILENCE = 24
};

C#声明:

[DllImport("libKeyFinder", CallingConvention = CallingConvention.Cdecl)]
private static extern IntPtr new_audio_data(
    uint frameRate, uint channels, uint samples);

[DllImport("libKeyFinder", CallingConvention = CallingConvention.Cdecl)]
private static extern void audio_data_set_sample(
    IntPtr audioData, uint index, double value);

[DllImport("libKeyFinder", CallingConvention = CallingConvention.Cdecl)]
private static extern void keyfinder_progressive_chromagram(IntPtr keyFinder, IntPtr audioData, IntPtr workspace);

[DllImport("libKeyFinder", CallingConvention = CallingConvention.Cdecl)]
private static extern Key keyfinder_key_of_chromagram(IntPtr keyFinder, IntPtr workspace);

public enum Key
{
    AMajor = 0,
    AMinor,
    BFlatMajor,
    BFlatMinor,
    BMajor,
    BMinor = 5,
    CMajor,
    CMinor,
    DFlatMajor,
    DFlatMinor,
    DMajor = 10,
    DMinor,
    EFlatMajor,
    EFlatMinor,
    EMajor,
    EMinor = 15,
    FMajor,
    FMinor,
    GFlatMajor,
    GFlatMinor,
    GMajor = 20,
    GMinor,
    AFlatMajor,
    AFlatMinor,
    Silence = 24
}

C#用法:

public void SetSample(uint index, double value)
{
    audio_data_set_sample(_audioData, index, value);
}

真正令人困惑的是，当我调试它时，在C#部分:SetSample._audioData中已经可以看到看似已处置/破坏的指针。最初，当从C#调用new_audio_data时，我得到了像0x032fe940这样的有效指针，但由于某种原因，它变成了0xBF13D000。请注意，它总是成为值0xBF13D000，因此我在线上搜索了这种值，希望发现a known memory pattern但没有成功。

如我所说，该程序没有更改，所以我完全不知该怎么办。

最佳答案

尝试为_audioData添加volatile
https://docs.microsoft.com/en-us/dotnet/csharp/language-reference/keywords/volatile