79 lines
1.4 KiB
C++
79 lines
1.4 KiB
C++
|
/*++
|
||
|
|
|
||
|
|
Copyright (c) 2000 Microsoft Corporation
|
||
|
|
|
||
|
|
Module Name:
|
||
|
|
|
||
|
|
HeapIgnoreMoveable.cpp
|
||
|
|
|
||
|
|
Abstract:
|
||
|
|
|
||
|
|
After 64k calls to GlobalAlloc, we are no longer able to use the
|
||
|
|
GMEM_MOVEABLE flag. This shim just filters it in the case of
|
||
|
|
GlobalAlloc failing.
|
||
|
|
|
||
|
|
This is a known issue with the heap manager on NT and is a won't fix.
|
||
|
|
|
||
|
|
According to adrmarin:
|
||
|
|
|
||
|
|
The table with handles cannot grow dynamic. The initial size is
|
||
|
|
hardcoded to 64k handles. Increasing this number will affect the
|
||
|
|
reserved address for each process.
|
||
|
|
|
||
|
|
See Whistler bug #147032.
|
||
|
|
|
||
|
|
Notes:
|
||
|
|
|
||
|
|
This is a general purpose shim - superceded by EmulateHeap.
|
||
|
|
|
||
|
|
History:
|
||
|
|
|
||
|
|
02/19/2000 linstev Created
|
||
|
|
|
||
|
|
--*/
|
||
|
|
|
||
|
|
#include "precomp.h"
|
||
|
|
|
||
|
|
IMPLEMENT_SHIM_BEGIN(HeapIgnoreMoveable)
|
||
|
|
#include "ShimHookMacro.h"
|
||
|
|
|
||
|
|
APIHOOK_ENUM_BEGIN
|
||
|
|
APIHOOK_ENUM_ENTRY(GlobalAlloc)
|
||
|
|
APIHOOK_ENUM_END
|
||
|
|
|
||
|
|
/*++
|
||
|
|
|
||
|
|
Remove the GMEM_MOVEABLE flag in the case of failure.
|
||
|
|
|
||
|
|
--*/
|
||
|
|
|
||
|
|
HGLOBAL
|
||
|
|
APIHOOK(GlobalAlloc)(
|
||
|
|
UINT uFlags,
|
||
|
|
DWORD dwBytes
|
||
|
|
)
|
||
|
|
{
|
||
|
|
HGLOBAL hRet = ORIGINAL_API(GlobalAlloc)(uFlags, dwBytes);
|
||
|
|
|
||
|
|
if (hRet == NULL)
|
||
|
|
{
|
||
|
|
hRet = ORIGINAL_API(GlobalAlloc)(
|
||
|
|
uFlags & ~GMEM_MOVEABLE, dwBytes);
|
||
|
|
}
|
||
|
|
|
||
|
|
return hRet;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*++
|
||
|
|
|
||
|
|
Register hooked functions
|
||
|
|
|
||
|
|
--*/
|
||
|
|
|
||
|
|
HOOK_BEGIN
|
||
|
|
APIHOOK_ENTRY(KERNEL32.DLL, GlobalAlloc)
|
||
|
|
HOOK_END
|
||
|
|
|
||
|
|
IMPLEMENT_SHIM_END
|
||
|
|
|