3GL   4GL   5GL  

. ReadProcessMemory. , , , CREATE_PROCESS_DEBUG_EVENT, PROCESS_VM_READ PROCESS_VM_WRITE. DebugActiveProcess, , , openProcess , .

, "--" (-on-write) Windows , , . , , , , . - , , , EXCEPTION_BREAKPOINT. , , , , , (private) , . , , .

, . , , , "--", , , virtualQueryEx. , API- virtualProtectEx, PAGE_EXECUTE_READWRITE, , Windows "--". . , ( , ). , , "-", . ( ) , , .

API Win32: OUTPUT_DEBUG_STRING_EVENT, . , , . , . 3 , . , , OutputDebugString , . 4-3 , WDBG OUTPUT_DEBUG_STRING_EVENT. , DBG_ReadProcessMemoryReadProcessMemory LOCALASSIST.DLL.

4-3.OutputDebugStringEvent PROCESSDEBUGEVENTS.CPP

static

DWORD OutputDebugStringEvent ( CDebugBaseUser * pUserClass ,

LPDEBUGGEEINFO pData ,

 DWORD dwProcessId, 

DWORD dwThreadld , 

OUTPUT_DEBUG_STRING_INFO & stODSI )

 {

TCHAR szBuff[ 512 ];

HANDLE hProc = pData->GetProcessHandle (); DWORD dwRead;

 // .

BOOL bRet = DBG_ReadProcessMemory( hProc ,

stODSI.lpDebugStringData , 

szBuff, min ( sizeof ( szBuff) ,

stODSI.nDebugStringLength), 

&dwRead ) ;

ASSERT ( TRUE == bRet);

if ( TRUE == bRet)

{

// NULL . 

szBuff [ dwRead + 1 ] = _T ( '\0');

 // CR/LF .

pUserClass->ConvertCRLF ( szBuff, sizeof ( szBuff)); 

// .

 pUserClass->OutputDebugStringEvent ( dwProcessId,

dwThreadld , szBuff ); 

}

 return ( DBG_CONTINUE);

}

        3GL   4GL   5GL  

, Instance, - - . .




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