分类：
2008-10-13 16:31:40
前面讲了一些关于符号信息的小常识。今天正好有点空，整理了一段代码，贴上来供大家作例子。代码是完整的，建个新工程加入它即可。但是要注意也许你的环境不支持这些代码，没关系，看看偶的上一篇文章，获得最新的debugging tools for windows即可。闲话少说，例子代码如下。
//============================================================================
// SymDump: A small tool used to dump symbol informaton from EXE, DLL or PDB files
// Author : zyq654321 --- Oct, 2004
// Comment: This is only a sample code to show you how to dump symbol information,
// you can improve it and your advise is appreciated.
#include
#include
#define _NO_CVCONST_H // We should define the constant in order to ...
#include
#include
#pragma comment( lib, "dbghelp.lib" )
BOOL CALLBACK SymEnumSymbolsProc(PSYMBOL_INFO pSymInfo, ULONG SymbolSize, PVOID UserContext )
{
if( pSymInfo != NULL )
{
// Show the symbol
_tprintf(_T("TYPE INDEX:%d "), pSymInfo->TypeIndex);
_tprintf(_T("SIZE:%d "), pSymInfo->Size);
_tprintf(_T("VALUE: %d "), pSymInfo->Value);
_tprintf(_T("NAME: %s\n"), pSymInfo->Name);
_tprintf(_T(" SYMBOL ADDRESS:0x%X "), pSymInfo->Address);
_tprintf(_T("PDB CLASSIFICATION: %d\n"), pSymInfo->Tag);
}
return TRUE;
}
int _tmain( int argc, const TCHAR* argv[] )
{
if(argc < 2)
{
goto FAILED_PARAM;
}
// Initilaize the symbol handle for the current process
if(!SymInitialize( GetCurrentProcess(),
NULL,
FALSE ))
{
_tprintf(_T("Failed when SymInitialize():%d\n"), GetLastError());
return 0;
}
if( argv[1] == NULL )
{
goto FAILED_PARAM;
}
//------------------------------------------------------------------------
// Set initial parameters
TCHAR pszExt[MAX_PATH];
_tsplitpath( argv[1], NULL, NULL, NULL, pszExt );
DWORD64 dw64Base = 0; // if the image is a .pdb file, dw64Base cannot be zero.
// if the value is zero, the library obtains the load address
// from the symbol file.
DWORD dwFileSize = 0; // if the image is a .pdb file, dwFileSize cannot be zero.
// if the value is zero, the library obtains the size
// from the symbol file.
_tcslwr(pszExt);
if(_tcsicmp(pszExt, _T(".pdb")) == 0)
{
// this is a .pdb file, and so we should set the load address and file size;
dw64Base = 0x10000000;
// get the file size
HANDLE hFile = CreateFile( argv[1], GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, 0, NULL );
if( INVALID_HANDLE_VALUE == hFile )
{
_tprintf(_T("Failed when open %s: %d"), argv[1], GetLastError());
goto FAILED_PARAM;
}
if( INVALID_FILE_SIZE == ( dwFileSize = GetFileSize(hFile, NULL)) )
{
_tprintf(_T("Failed when read the size of %s: %d"), argv[1], GetLastError());
goto FAILED_PARAM;
}
CloseHandle(hFile);
}
//------------------------------------------------------------------------
// Load symbol table
_tprintf(_T("Loading... %s\n"), argv[1]);
DWORD64 dw64ModAddress = SymLoadModule64( GetCurrentProcess(),
NULL,
argv[1],
NULL,
dw64Base,
dwFileSize);
if( dw64ModAddress == 0 )
{
_tprintf(_T("Failed when SymLoadModule64(): %d \n"), GetLastError());
return 0;
}
_tprintf(_T("Load Address: %I64x \n"), dw64ModAddress);
//------------------------------------------------------------------------
// Show symbol information supported by the loaded file
IMAGEHLP_MODULE64 ImageModule;
memset(&ImageModule, 0, sizeof(ImageModule) );
ImageModule.SizeOfStruct = sizeof(ImageModule);
if(!SymGetModuleInfo64( GetCurrentProcess(),
dw64ModAddress,
&ImageModule ))
{
_tprintf(_T("Failed when load image info:%d"), GetLastError());
return 0;
}
// Show informations included in the IMAGEHLP_MODULE64
_tprintf(_T("CheckSum : %d\n"), ImageModule.CheckSum);
_tprintf(_T("Number of Loaded Symbols: %d\n"), ImageModule.NumSyms);
switch(ImageModule.SymType)
{
case SymCoff:
_tprintf(_T("Symbol Type: COFF symbols\n") );
break;
case SymCv:
_tprintf(_T("Symbol Type: CodeView symbols\n") );
break;
case SymDeferred:
_tprintf(_T("Symbol Type: Symbol loading deferred\n") );
break;
case SymDia:
_tprintf(_T("Symbol Type: DIA symbols\n") );
break;
case SymExport:
_tprintf(_T("Symbol Type: Symbols generated from a DLL export table\n") );
break;
case SymNone:
_tprintf(_T("Symbol Type: No symbols are loaded\n") );
break;
case SymPdb:
_tprintf(_T("Symbol Type: PDB symbols\n") );
break;
case SymSym:
_tprintf(_T("Symbol Type: .sym file\n") );
break;
case SymVirtual:
_tprintf(_T("Symbol Type: Virtual module created by SymLoadModuleEx with SLMFLAG_VIRTUAL\n") );
break;
}
_tprintf(_T("Module Name : %s\n"), ImageModule.ModuleName);
_tprintf(_T("Image Name : %s\n"), ImageModule.ImageName);
_tprintf(_T("Loaded Image Name: %s\n"), ImageModule.LoadedImageName);
_tprintf(_T("Loaded PDB Name : %s\n"), ImageModule.LoadedPdbName);
_tprintf(_T("CV Signature : %d\n"), ImageModule.CVSig);
_tprintf(_T("CV Data : %s\n"), ImageModule.CVData);
_tprintf(_T("PDB Signature : %d\n"), ImageModule.PdbSig);
if( ImageModule.PdbSig70 != GUID_NULL )
{
WCHAR wcsBuffer[MAX_PATH];
if(0 == StringFromGUID2( ImageModule.PdbSig70,
wcsBuffer,
MAX_PATH))
{
_tprintf(_T("PDB Signature 7.0: Unknown GUID\n"));
}
else
{
_tprintf(_T("PDB Signature 7.0: %S\n"), wcsBuffer);
}
}
else
{
_tprintf(_T("PDB Signature 7.0: GUID_NULL \n"));
}
_tprintf(_T("DBI Age of PDB : %d\n"), ImageModule.PdbAge);
_tprintf(_T("Loaded PDB is unmatched : %s\n"), ImageModule.PdbUnmatched ? _T("Yes"):_T("No"));
_tprintf(_T("Loaded DBG is unmatched : %s\n"), ImageModule.DbgUnmatched ? _T("Yes"):_T("No"));
_tprintf(_T("Line number information is available: %s\n"), ImageModule.LineNumbers ? _T("Yes"):_T("No"));
_tprintf(_T("Symbol information is available : %s\n"), ImageModule.GlobalSymbols ? _T("Yes"):_T("No"));
_tprintf(_T("Type information is available : %s\n"), ImageModule.TypeInfo ? _T("Yes"):_T("No"));
//------------------------------------------------------------------------
// Enumerate symbols in the module
_tprintf(_T("Symbols List:\n"));
if(!SymEnumSymbols( GetCurrentProcess(),
dw64ModAddress,
NULL, // Null point out that list all symbols
SymEnumSymbolsProc,
NULL))
{
_tprintf( _T("Failed when SymEnumSymbols(): %d \n"), GetLastError() );
}
//------------------------------------------------------------------------
// Unload symbols table
if(!SymUnloadModule64( GetCurrentProcess(), dw64ModAddress ))
{
_tprintf( _T("Failed when SymUnloadModule64() : %d \n"), GetLastError() );
}
if(!SymCleanup(GetCurrentProcess()))
{
_tprintf(_T("Failed when SymCleanup(): %d \n"), GetLastError());
return 0;
}
return 0;
FAILED_PARAM:
_tprintf(_T("Failed Parameter!\n"));
_tprintf(_T("Usage: SymDump -filename\n"));
_tprintf(_T("filename: a EXE, DLL or PDB file\n"));
return 0;
}
