调用到的PInvoke已经失衡堆栈......甚至与CDECL DLL导入失败 [英] A call to PInvoke has unbalanced the stack... dll import fails even with Cdecl
问题描述
啊哈，这个问题是全栈溢出，所以我已经着手增加CallingConvention = CallingConvention.Cdecl已经为我不得不导入其他库，但在这种情况下工作得很好，没有什么变化，仍然失败具有相同的错误消息。
Aha, this question is all over stack overflow so I've already proceeded to add CallingConvention = CallingConvention.Cdecl which has worked just fine for other libraries I've had to import but in this case, nothing changes and it still fails with the same error message.
原来的code这个就出来了一个.NET 3.5的项目和工作完全正常：
The original code for this came out of a .net 3.5 project and works perfectly fine:
[DllImport("Compiled DSP.dll")]
private static extern int fnGetConfigParam(int nID, ref stParamInt pstParam);
[DllImport("Compiled DSP.dll")]
private static extern int fnGetConfigParam(int nID, ref stParamFloat pstParam);
新项目是一个.NET 4.0的项目，试图调用同一个库。我已经添加了调用约定：
The new project is a .net 4.0 project that is trying to call the same library. I've already added the calling convention:
[DllImport("Compiled DSP.dll", CallingConvention = CallingConvention.Cdecl)]
private static extern int fnGetConfigParam(int nID, ref stParamInt pstParam);
[DllImport("Compiled DSP.dll", CallingConvention = CallingConvention.Cdecl)]
private static extern int fnGetConfigParam(int nID, ref stParamFloat pstParam);
这两个裁判类型是结构。当我尝试运行相同的code调用此函数为3.5的项目，我得到的PInvoke的错误，即使我改变调用STDCALL（如预期），我得到了同样的错误。
Both of the ref types are structs. When I try to run the same code that calls this function as the 3.5 project, I get the PInvoke error, even if I change the call to StdCall (as expected) I get the same error.
有什么想法？我猜测，该结构是某种干扰而使用进口这样是不是对我来说是常见的任务，所以这是一个盲目的猜测。时问谷歌和闲逛更深的位置。
Any thoughts? I'm guessing that the struct is somehow interfering but using imports like this is not a common task for me so this is a blind guess. Time to ask google and poke around deeper on here.
修改的：如果这是很有用的，这里有两个结构传递作为参考：
EDIT : In case this is useful, here are the two structs passed as reference:
stParamInt：
stParamInt:
[StructLayout(LayoutKind.Sequential, Pack = 1)]
private struct stParamInt
{
public uint unID;
public int nValue;
public int nValueMin;
public int nValueMax;
public int nValueDef;
public int nUnitsType;
public int nUnits;
public byte[] GetBytes()
{
byte[] result = new byte[0];
List<byte> buf = new List<byte>();
buf.AddRange(BitConverter.GetBytes(unID));
buf.AddRange(BitConverter.GetBytes(nValue));
buf.AddRange(BitConverter.GetBytes(nValueMin));
buf.AddRange(BitConverter.GetBytes(nValueMax));
buf.AddRange(BitConverter.GetBytes(nValueDef));
buf.AddRange(BitConverter.GetBytes(nUnitsType));
buf.AddRange(BitConverter.GetBytes(nUnits));
result = buf.ToArray();
return result;
}
public stParamInt(byte[] buf)
{
unID = BitConverter.ToUInt32(buf, 0);
nValue = BitConverter.ToInt32(buf, 4);
nValueMin = BitConverter.ToInt32(buf, 8);
nValueMax = BitConverter.ToInt32(buf, 12);
nValueDef = BitConverter.ToInt32(buf, 16);
nUnitsType = BitConverter.ToInt32(buf, 20);
nUnits = BitConverter.ToInt32(buf, 24);
}
};
stParamFloat：
stParamFloat:
[StructLayout(LayoutKind.Sequential, Pack = 1)]
private struct stParamFloat
{
public uint unID;
public float fValue;
public float fValueMin;
public float fValueMax;
public float fValueDef;
public int nUnitsType;
public int nUnits;
public byte[] GetBytes()
{
byte[] result = new byte[0];
List<byte> buf = new List<byte>();
buf.AddRange(BitConverter.GetBytes(unID));
buf.AddRange(BitConverter.GetBytes(fValue));
buf.AddRange(BitConverter.GetBytes(fValueMin));
buf.AddRange(BitConverter.GetBytes(fValueMax));
buf.AddRange(BitConverter.GetBytes(fValueDef));
buf.AddRange(BitConverter.GetBytes(nUnitsType));
buf.AddRange(BitConverter.GetBytes(nUnits));
result = buf.ToArray();
return result;
}
public stParamFloat(byte[] buf)
{
unID = BitConverter.ToUInt32(buf, 0);
fValue = BitConverter.ToSingle(buf, 4);
fValueMin = BitConverter.ToSingle(buf, 8);
fValueMax = BitConverter.ToSingle(buf, 12);
fValueDef = BitConverter.ToSingle(buf, 16);
nUnitsType = BitConverter.ToInt32(buf, 20);
nUnits = BitConverter.ToInt32(buf, 24);
}
};
修改的我设法挖掘出相关的DLL中的签名，这是在C ++中的非托管code以下方法签名：
EDIT I managed to dig out the signature within the related dll, it's in C++ unmanaged code with the following method signature:
COMPILEDDSP_API int fnGetConfigParam(int nID, struct stPint *pstParam)
{
return CONFIG_GetSetConfigParam(GET_PARAM, nID, pstParam, &g_stActiveCfg, sizeof(struct stActiveConfig)/sizeof(struct stPint), NULL);
}
不幸的是，我，我不是在标准的C ++函数特别是流畅的，但签名似乎都很正常。
Unfortunately for me I'm not especially fluent in standard C++ functions but the signature appears to be fine.
修改的我发现，它的工作原理prefectly罚款，如果我只是建立，并从我的仓运行。如果我尝试在调试模式下通过Visual Studio运行时，出现此错误的PInvoke。
EDIT I found that it works prefectly fine if I just build and run it from my bin. If I try to run in debug mode through visual studio, it fails with this PInvoke error.
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您可以通过 REF 与的IntPtr 结构，进口将
You can pass the ref structures with IntPtr, the importing would be
[DllImport("Compiled DSP.dll")]
private static extern int fnGetConfigParam(int nID, IntPtr pstParam);
和测试
var sizeParamInt=Marshal.SizeOf(typeof(stParamInt));
var marshalParamInt=Marshal.AllocHGlobal(sizeParamInt);
fnGetConfigParam(123, marshalParamInt);
var paramInt=(stParamInt)Marshal.PtrToStructure(marshalParamInt, typeof(stParamInt));
Marshal.FreeHGlobal(marshalParamInt);
请注意，我没有尝试的调用约定，您可能需要测试与实际code。
Note that I didn't try for the calling conventions, you might need to test with your actual code.
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