PInvoking C ++ DLL时AccessViolationException（cdecl调用约定的问题？） [英] AccessViolationException when PInvoking C++ DLL (cdecl calling convention problem?)

问题描述

我花了一整天研究这个，我仍然不明白：

I've spent all day researching this, and I'm none the wiser:

我有PInvokes在C ++ DLL的方法的C＃DLL。我有没有问题，在调试模式下编译时这样做，但在Release模式编译时，我得到一个AccessViolationException。谷歌搜索这个问题告诉我，这可能是与调用不遵医嘱约定的问题。现在的代码看起来像这样在C＃中：

I have a C# DLL which PInvokes a method in a C++ DLL. I have had no problems doing this when compiling in Debug mode, but when compiling in Release mode I get an AccessViolationException. Googling this problem tells me that it's probably an issue with incompliant calling conventions. The code now looks like this in C#:

[return: MarshalAs(UnmanagedType.U1)]
[DllImport("Native.dll", CallingConvention = CallingConvention.Cdecl)]
internal static extern Boolean AMethod(Int32 mode, byte frame);

和C ++中：

extern "C" {
     DLL_EXPORT bool AMethod(int mode, BYTE frame)
     {
      ...
     }
}

我已经设置了C ++项目编译__cdecl调用VS2010中约定，但我仍然得到AccessViolationException我不知道还有什么我能做的。我要指出，我的C ++ DLL使用第三方的DLL，我不知道什么叫他们使用的约定。

I've set the C++ project to compile with the __cdecl calling convention in VS2010, but I still get the AccessViolationException and I have no idea what more I can do. I should note that my C++ DLL uses third-party DLLs, and I do not know what calling convention they use.

任何帮助，将不胜感激！

Any help would be appreciated!

哦，我没有得到我的异常开发计算机上，只有我的目标系统。

Oh, and I don't get the exception on my development machine, only on my target system.

推荐答案

尝试用这个重新排序声明：结果

Try with this reordering of statements :

[DllImport("Native.dll", CallingConvention = CallingConvention.Cdecl)]
[return: MarshalAs(UnmanagedType.U1)]
internal static extern Boolean AMethod(Int32 mode, byte frame);

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