140 lines
2.3 KiB
C++
140 lines
2.3 KiB
C++
|
/*++
|
||
|
|
|
||
|
|
Copyright (c) 2000 Microsoft Corporation
|
||
|
|
|
||
|
|
Module Name:
|
||
|
|
|
||
|
|
HeapDelayLocalFree.cpp
|
||
|
|
|
||
|
|
Abstract:
|
||
|
|
|
||
|
|
Delay calls to LocalFree.
|
||
|
|
|
||
|
|
History:
|
||
|
|
|
||
|
|
09/19/2000 robkenny
|
||
|
|
|
||
|
|
--*/
|
||
|
|
|
||
|
|
#include "precomp.h"
|
||
|
|
#include "CharVector.h"
|
||
|
|
|
||
|
|
IMPLEMENT_SHIM_BEGIN(HeapDelayLocalFree)
|
||
|
|
#include "ShimHookMacro.h"
|
||
|
|
|
||
|
|
APIHOOK_ENUM_BEGIN
|
||
|
|
APIHOOK_ENUM_ENTRY(LocalFree)
|
||
|
|
APIHOOK_ENUM_END
|
||
|
|
|
||
|
|
CRITICAL_SECTION g_CritSec;
|
||
|
|
static VectorT<HLOCAL> *g_DelayLocal = NULL;
|
||
|
|
static DWORD g_DelayBufferSize = 20;
|
||
|
|
|
||
|
|
HLOCAL
|
||
|
|
APIHOOK(LocalFree)(
|
||
|
|
HLOCAL hMem // handle to local memory object
|
||
|
|
)
|
||
|
|
{
|
||
|
|
if (hMem == NULL)
|
||
|
|
return NULL;
|
||
|
|
|
||
|
|
if (g_DelayLocal)
|
||
|
|
{
|
||
|
|
EnterCriticalSection(&g_CritSec);
|
||
|
|
|
||
|
|
// If the list is full
|
||
|
|
if (g_DelayLocal->Size() > 0 &&
|
||
|
|
g_DelayLocal->Size() >= g_DelayLocal->MaxSize())
|
||
|
|
{
|
||
|
|
HLOCAL & hDelayed = g_DelayLocal->Get(0);
|
||
|
|
#if DBG
|
||
|
|
DPFN(eDbgLevelInfo, "LocalFree(0x%08x).", hDelayed);
|
||
|
|
#endif
|
||
|
|
ORIGINAL_API(LocalFree)(hDelayed);
|
||
|
|
|
||
|
|
g_DelayLocal->Remove(0);
|
||
|
|
}
|
||
|
|
|
||
|
|
g_DelayLocal->Append(hMem);
|
||
|
|
#if DBG
|
||
|
|
DPFN(eDbgLevelInfo, "Delaying LocalFree(0x%08x).", hMem);
|
||
|
|
#endif
|
||
|
|
|
||
|
|
LeaveCriticalSection(&g_CritSec);
|
||
|
|
|
||
|
|
return NULL;
|
||
|
|
}
|
||
|
|
|
||
|
|
HLOCAL returnValue = ORIGINAL_API(LocalFree)(hMem);
|
||
|
|
return returnValue;
|
||
|
|
}
|
||
|
|
|
||
|
|
BOOL ParseCommandLine(const char * commandLine)
|
||
|
|
{
|
||
|
|
InitializeCriticalSection(&g_CritSec);
|
||
|
|
|
||
|
|
g_DelayLocal = new VectorT<HLOCAL>;
|
||
|
|
|
||
|
|
if (g_DelayLocal)
|
||
|
|
{
|
||
|
|
// If we cannot resize the array, stop now
|
||
|
|
if (!g_DelayLocal->Resize(g_DelayBufferSize))
|
||
|
|
{
|
||
|
|
delete g_DelayLocal;
|
||
|
|
g_DelayLocal = NULL;
|
||
|
|
|
||
|
|
// Turn off all hooks:
|
||
|
|
return FALSE;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return TRUE;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*++
|
||
|
|
|
||
|
|
Register hooked functions
|
||
|
|
|
||
|
|
--*/
|
||
|
|
|
||
|
|
BOOL
|
||
|
|
NOTIFY_FUNCTION(
|
||
|
|
DWORD fdwReason
|
||
|
|
)
|
||
|
|
{
|
||
|
|
if (fdwReason == DLL_PROCESS_ATTACH)
|
||
|
|
{
|
||
|
|
return ParseCommandLine(COMMAND_LINE);
|
||
|
|
}
|
||
|
|
else if (fdwReason == DLL_PROCESS_DETACH)
|
||
|
|
{
|
||
|
|
if (g_DelayLocal)
|
||
|
|
{
|
||
|
|
delete g_DelayLocal;
|
||
|
|
g_DelayLocal = NULL;
|
||
|
|
}
|
||
|
|
|
||
|
|
DeleteCriticalSection(&g_CritSec);
|
||
|
|
}
|
||
|
|
|
||
|
|
return TRUE;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*++
|
||
|
|
|
||
|
|
Register hooked functions
|
||
|
|
|
||
|
|
--*/
|
||
|
|
|
||
|
|
HOOK_BEGIN
|
||
|
|
|
||
|
|
CALL_NOTIFY_FUNCTION
|
||
|
|
|
||
|
|
APIHOOK_ENTRY(KERNEL32.DLL, LocalFree)
|
||
|
|
|
||
|
|
HOOK_END
|
||
|
|
|
||
|
|
|
||
|
|
IMPLEMENT_SHIM_END
|
||
|
|
|