C# COM互操作中发生异常 我有一个C++ COM客户端和一个C.com服务器，我一直在尝试让这个小项目工作。我已经成功地注册了服务器，并使基本的通信工作，来回。在其中一个调用中，我得到一个“写入异常”，其详细信息如下所述
我有一个C++的COM客户机，它运行<代码> CoCueActudio上的<代码>函数发现< /Cord>对象，它工作正常。p>C# COM互操作中发生异常 我有一个C++ COM客户端和一个C.com服务器，我一直在尝试让这个小项目工作。我已经成功地注册了服务器，并使基本的通信工作，来回。在其中一个调用中，我得到一个“写入异常”，其详细信息如下所述,c#,c++,com-interop,C#,C++,Com Interop,我有一个C++的COM客户机，它运行 CoCueActudio上的函数发现< /Cord>对象，它工作正常。p> 然后客户端调用pffunctiondiscovery->GetInstanceCollection（par1、par2、par3和pFICollection）。服务器创建一个新的FICollection对象，并将其复制到第四个参数中，即pFICollection 然后服务器调用pFICollection->GetCount（&count）。服务器返回相应的数字，该数字将反映在客户端上
pffunctiondiscovery->GetInstanceCollection（par1、par2、par3和pFICollection）FICollectionpFICollectionpFICollection->GetCount（&count）pFICollection->Item（index，pffunctioninstance）无效的\u指针\u写入错误
这里是C++客户端的函数调用：
IFunctionInstance* pFI;
ULONG index = 0;
hr = pFICollection->Item(index, &pFI);
if (FAILED(hr))
{
TRACE_MESSAGE(Error,"Failed to get collection item %08x\n",hr);
goto Exit;
}
[Guid("ba818ce5-b55f-443f-ad39-2fe89be6191f")]
[ClassInterface(ClassInterfaceType.None)]
public class FunctionInstanceCollection : IFunctionInstanceCollection
{
public long GetCount(ref uint containerCount)
{
System.Console.WriteLine("Server- GetCount() called...");
containerCount = 1;
return 0;
}
public long Item(
uint index,
ref IFunctionInstance o_IFunctionInstance
)
{
System.Console.WriteLine("Server- Item() called");
FunctionInstance ppFI = new FunctionInstance();
o_IFunctionInstance = ppFI;
GlobalClass.itemIndex = index;
return 0;
}
}
*******************************************************************************
* *
* Exception Analysis *
* *
*******************************************************************************
FAULTING_IP:
mscorwks!RunML+178 [f:\dd\ndp\clr\src\vm\ml.cpp @ 324]
68ac15dc 890a mov dword ptr [edx],ecx
EXCEPTION_RECORD: ffffffff -- (.exr 0xffffffffffffffff)
ExceptionAddress: 68ac15dc (mscorwks!RunML+0x00000178)
ExceptionCode: c0000005 (Access violation)
ExceptionFlags: 00000000
NumberParameters: 2
Parameter[0]: 00000001
Parameter[1]: fffffffe
Attempt to write to address fffffffe
FAULTING_THREAD: 00000ae4
DEFAULT_BUCKET_ID: INVALID_POINTER_WRITE
PROCESS_NAME: DevMapTest.exe
ERROR_CODE: (NTSTATUS) 0xc0000005 - The instruction at 0x%08lx referenced memory at 0x%08lx. The memory could not be %s.
EXCEPTION_CODE: (NTSTATUS) 0xc0000005 - The instruction at 0x%08lx referenced memory at 0x%08lx. The memory could not be %s.
EXCEPTION_PARAMETER1: 00000001
EXCEPTION_PARAMETER2: fffffffe
WRITE_ADDRESS: fffffffe
FOLLOWUP_IP:
mscorwks!COMToCLRWorkerBody+3ca [f:\dd\ndp\clr\src\vm\comtoclrcall.cpp @ 605]
68ac229c e9dc98fcff jmp mscorwks!COMToCLRWorkerBody+0x3d5 (68a8bb7d)
NTGLOBALFLAG: 70
APPLICATION_VERIFIER_FLAGS: 0
MANAGED_STACK: !dumpstack -EE
OS Thread Id: 0xae4 (0)
Current frame:
ChildEBP RetAddr Caller,Callee
0007f814 01a2f855 (MethodDesc 0x1a5c5e4 +0x75 System.IO.__ConsoleStream.WriteFileNative(Microsoft.Win32.SafeHandles.SafeFileHandle, Byte[], Int32, Int32, Int32, Int32 ByRef))
0007f834 01a2f855 (MethodDesc 0x1a5c5e4 +0x75 System.IO.__ConsoleStream.WriteFileNative(Microsoft.Win32.SafeHandles.SafeFileHandle, Byte[], Int32, Int32, Int32, Int32 ByRef))
0007f85c 01a2f6fc (MethodDesc 0x1a5c5d0 +0x5c System.IO.__ConsoleStream.Write(Byte[], Int32, Int32))
0007f880 01a2f041 (MethodDesc 0x1a5c5b0 +0x19 System.IO.__ConsoleStream.Flush())
0007f88c 01a2e93a (MethodDesc 0x1a5c2d4 +0xa2 System.IO.StreamWriter.Flush(Boolean, Boolean))
0007f8a4 01a2f53c (MethodDesc 0x1a5c328 +0x54 System.IO.StreamWriter.Write(Char[], Int32, Int32))
0007f8c0 01a2f2c4 (MethodDesc 0x1a5bae8 +0xdc System.IO.TextWriter.WriteLine(System.String))
0007f8e4 01a2f942 (MethodDesc 0x1a5baf8 +0x4a System.IO.TextWriter.WriteLine(System.String, System.Object))
PRIMARY_PROBLEM_CLASS: INVALID_POINTER_WRITE
BUGCHECK_STR: APPLICATION_FAULT_INVALID_POINTER_WRITE_INVALID_POINTER_READ
LAST_CONTROL_TRANSFER: from 68ac229c to 68ac15dc
STACK_TEXT:
0007f90c 68ac229c 01530c6c 0007f9a8 00000006 mscorwks!RunML+0x178
0007f9d4 68a8bbeb 00135c08 0007fbcc 0007fc44 mscorwks!COMToCLRWorkerBody+0x3ca
0007fa30 68a8bd54 00135c08 0007fbcc 0007fc44 mscorwks!COMToCLRWorkerDebuggerWrapper+0x37
0007fc04 003aa2be 00135c08 0007fc44 54d39e47 mscorwks!COMToCLRWorker+0x157
0007fc2c 0027e843 00000000 00000001 00000000 CLRStub[StubLinkStub]@3aa2be
0007fc84 0027e673 004610c8 00000000 0007fcbc DevMapTest!CDeviceMap::InitContainers+0x183
0007fc94 00273e6d 00000000 0007fcd4 004610c8 DevMapTest!CDeviceMap::Initialize+0x63
0007fcbc 00280676 0007fccc 00000000 00000000 DevMapTest!InitDeviceMap+0x9d
0007fcd8 00280b40 00000001 00000000 0007fd28 DevMapTest!RunTestXml+0x26
0007fce8 00280e5e 00000002 00461070 00462ac8 DevMapTest!wmain+0x60
0007fd28 76a715d8 7fb13000 0007fd74 77d61ddb DevMapTest!__wmainCRTStartup+0x100
0007fd34 77d61ddb 7fb13000 778022b4 00000000 kernel32!BaseThreadInitThunk+0xe
0007fd74 77d61dae 00280ecb 7fb13000 ffffffff ntdll!__RtlUserThreadStart+0x6f
0007fd8c 00000000 00280ecb 7fb13000 00000000 ntdll!_RtlUserThreadStart+0x1b
FAULTING_SOURCE_CODE:
No source found for 'f:\dd\ndp\clr\src\vm\comtoclrcall.cpp'
FAULTING_SOURCE_LINE: f:\dd\ndp\clr\src\vm\comtoclrcall.cpp
SYMBOL_STACK_INDEX: 1
SYMBOL_NAME: mscorwks!COMToCLRWorkerBody+3ca
FOLLOWUP_NAME: ndpqrt
MODULE_NAME: mscorwks
IMAGE_NAME: mscorwks.dll
DEBUG_FLR_IMAGE_TIMESTAMP: 4cf5e892
STACK_COMMAND: dt ntdll!LdrpLastDllInitializer BaseDllName ; dt ntdll!LdrpFailureData ; ~0s ; kb
FAILURE_BUCKET_ID: INVALID_POINTER_WRITE_c0000005_mscorwks.dll!COMToCLRWorkerBody
BUCKET_ID: APPLICATION_FAULT_INVALID_POINTER_WRITE_INVALID_POINTER_READ_mscorwks!COMToCLRWorkerBody+3ca
您的服务器接口有问题。不要通过引用返回单个“out”参数-通过值返回它。Make
GetCount（）longItem（）IFunctionInstance