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This is a general purpose shim - superceded by EmulateHeap.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