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///////////////////////////////////////////////////////////////////////////////
//
// DViewHelper - Expression Evaluator for the D string and object class
// Copyright (c) 2009-2010 by Rainer Schuetze, All Rights Reserved
//
// License for redistribution is given by the Artistic License 2.0
// see file LICENSE for further details
//
// Compile the DLL and add the following lines to AUTOEXP.DAT in section [AutoExpand]
// string_viewhelper=$ADDIN(<path to the DLL>\dviewhelper.dll,_DStringView@28)
// wstring_viewhelper=$ADDIN(<path to the DLL>\dviewhelper.dll,_DWStringView@28)
// dstring_viewhelper=$ADDIN(<path to the DLL>\dviewhelper.dll,_DDStringView@28)
// object_viewhelper=$ADDIN(<path to the DLL>\dviewhelper.dll,_DObjectView@28)
//
///////////////////////////////////////////////////////////////////////////////
#define _CRT_SECURE_NO_WARNINGS
#include <windows.h>
#include <stdio.h>
extern "C" {
// Copied from MSDN
struct DEBUGHELPER
{
DWORD dwVersion;
HRESULT (WINAPI *ReadDebuggeeMemory)(DEBUGHELPER *pThis, DWORD dwAddr, DWORD nWant, VOID* pWhere, DWORD *nGot);
// from here only when dwVersion >= 0x20000
DWORDLONG (WINAPI *GetRealAddress)(DEBUGHELPER *pThis);
HRESULT (WINAPI *ReadDebuggeeMemoryEx)(DEBUGHELPER *pThis, DWORDLONG qwAddr, DWORD nWant, VOID* pWhere, DWORD *nGot);
int (WINAPI *GetProcessorType)(DEBUGHELPER *pThis);
};
// possible processor types
typedef enum _MPT {
mptix86 = 0, // Intel X86
mptia64 = 1, // Intel Merced
mptamd64 = 2, // AMD64
mptUnknown = 3 // Unknown
} MPT;
HRESULT readMem(DEBUGHELPER *pHelper, DWORDLONG qwAddr, DWORD nWant, VOID* pWhere, DWORD *nGot)
{
if(pHelper->dwVersion < 0x20000)
return pHelper->ReadDebuggeeMemory(pHelper, (DWORD)qwAddr, nWant, pWhere, nGot);
return pHelper->ReadDebuggeeMemoryEx(pHelper, qwAddr, nWant, pWhere, nGot);
}
struct DString
{
DWORD length;
DWORD data;
};
///////////////////////////////////////////////////////////////////////////////
HRESULT WINAPI StringView(DWORD dwAddress, DEBUGHELPER *pHelper, int nBase, BOOL bUniStrings,
char *pResult, size_t max, DWORD sizePerChar)
{
DWORDLONG qwAddress = dwAddress;
if(pHelper->dwVersion >= 0x20000)
qwAddress = pHelper->GetRealAddress(pHelper);
int proc = 0;
if(pHelper->dwVersion >= 0x20000)
proc = pHelper->GetProcessorType(pHelper);
int sizeOfPtr = proc == 0 ? 4 : 8;
// Get the string struct
char strdata[16];
DWORD read;
if (readMem(pHelper, qwAddress, 2*sizeOfPtr, strdata, &read) != S_OK)
{
strncpy(pResult,"Cannot access struct", max);
return S_OK;
}
DWORDLONG length, data;
if(sizeOfPtr > 4)
{
length = *(DWORDLONG*) strdata;
data = *(DWORDLONG*) (strdata + sizeOfPtr);
}
else
{
length = *(DWORD*) strdata;
data = *(DWORD*) (strdata + sizeOfPtr);
}
if (length == 0)
{
strncpy(pResult,"\"\"", max);
return S_OK;
}
char* pData = pResult + 1;
DWORD cnt = (length < max - 3 ? (DWORD)length : max - 3);
if (sizePerChar * cnt > max)
pData = new char[sizePerChar * cnt];
if (readMem(pHelper, data, sizePerChar * cnt, pData, &read) != S_OK)
{
strncpy(pResult,"Cannot access data", max);
}
else
{
//! @todo: proper utf8/16/32 translation
for (DWORD p = 0; p < cnt; p++)
{
int ch;
if (sizePerChar == 4)
ch = ((long*) pData) [p];
else if (sizePerChar == 2)
ch = ((short*) pData) [p];
else
ch = pData [p];
if (ch >= 128 && ch < -128)
pResult[p + 1] = -1;
else
pResult[p + 1] = (char) ch;
}
pResult[0] = '\"';
pResult[cnt+1] = '\"';
pResult[cnt+2] = 0;
}
if(pData != pResult + 1)
delete [] pData;
return S_OK;
}
__declspec(dllexport)
HRESULT WINAPI DStringView(DWORD dwAddress, DEBUGHELPER *pHelper, int nBase, BOOL bUniStrings,
char *pResult, size_t max, DWORD reserved)
{
return StringView(dwAddress, pHelper, nBase, bUniStrings, pResult, max, 1);
}
__declspec(dllexport)
HRESULT WINAPI DWStringView(DWORD dwAddress, DEBUGHELPER *pHelper, int nBase, BOOL bUniStrings,
char *pResult, size_t max, DWORD reserved)
{
return StringView(dwAddress, pHelper, nBase, bUniStrings, pResult, max, 2);
}
__declspec(dllexport)
HRESULT WINAPI DDStringView(DWORD dwAddress, DEBUGHELPER *pHelper, int nBase, BOOL bUniStrings,
char *pResult, size_t max, DWORD reserved)
{
return StringView(dwAddress, pHelper, nBase, bUniStrings, pResult, max, 4);
}
__declspec(dllexport)
HRESULT WINAPI DObjectView(DWORD dwAddress, DEBUGHELPER *pHelper, int nBase, BOOL bUniStrings,
char *pResult, size_t max, DWORD reserved)
{
DWORDLONG qwAddress = dwAddress;
if(pHelper->dwVersion >= 0x20000)
qwAddress = pHelper->GetRealAddress(pHelper);
if(qwAddress == 0)
{
strncpy(pResult,"null", max);
return S_OK;
}
int proc = 0;
if(pHelper->dwVersion >= 0x20000)
proc = pHelper->GetProcessorType(pHelper);
int sizeOfPtr = proc == 0 ? 4 : 8;
DWORD read;
DWORDLONG vtablePtr = 0;
if (readMem(pHelper, qwAddress, sizeOfPtr, &vtablePtr, &read) != S_OK)
{
strncpy(pResult,"Cannot access object", max);
return S_OK;
}
DWORDLONG classinfoPtr = 0;
if (readMem(pHelper, vtablePtr, sizeOfPtr, &classinfoPtr, &read) != S_OK)
{
strncpy(pResult,"Cannot access vtable", max);
return S_OK;
}
char strdata[16];
if (readMem(pHelper, classinfoPtr + 4*sizeOfPtr, 2*sizeOfPtr, strdata, &read) != S_OK)
{
strncpy(pResult,"Cannot access class info", max);
return S_OK;
}
DWORDLONG length, data;
if(sizeOfPtr > 4)
{
length = *(DWORDLONG*) strdata;
data = *(DWORDLONG*) (strdata + sizeOfPtr);
}
else
{
length = *(DWORD*) strdata;
data = *(DWORD*) (strdata + sizeOfPtr);
}
DWORD cnt = (DWORD)(length < max - 1 ? length : max - 1);
if (readMem(pHelper, data, cnt, pResult, &read) != S_OK)
{
strncpy(pResult,"Cannot access name data", max);
return S_OK;
}
pResult[cnt] = 0;
return S_OK;
}
// avoid unloading the DLL with every expression
BOOL WINAPI DllMain(HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved)
{
if(fdwReason == DLL_PROCESS_ATTACH)
{
TCHAR moduleName[1024];
if(GetModuleFileName(hinstDLL, moduleName, sizeof(moduleName)/ sizeof(TCHAR)))
LoadLibrary(moduleName);
}
return TRUE;
}
} // extern "C"
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