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/*
* basic interfaces
*
* Copyright 1997 Marcus Meissner
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include "config.h"
#include <ctype.h>
#include <stdarg.h>
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#define COBJMACROS
#include "windef.h"
#include "winbase.h"
#include "winuser.h"
#include "ole2.h"
#include "winerror.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(olemalloc);
/******************************************************************************
* IMalloc32 implementation
*
* NOTES
* For supporting CoRegisterMallocSpy the IMalloc implementation must know if
* a given memory block was allocated with a spy active.
*
*****************************************************************************/
/* set the vtable later */
static const IMallocVtbl VT_IMalloc32;
typedef struct {
const IMallocVtbl *lpVtbl;
DWORD dummy; /* nothing, we are static */
IMallocSpy * pSpy; /* the spy when active */
DWORD SpyedAllocationsLeft; /* number of spyed allocations left */
BOOL SpyReleasePending; /* CoRevokeMallocSpy called with spyed allocations left*/
LPVOID * SpyedBlocks; /* root of the table */
int SpyedBlockTableLength; /* size of the table*/
} _Malloc32;
/* this is the static object instance */
static _Malloc32 Malloc32 = {&VT_IMalloc32, 0, NULL, 0, 0, NULL, 0};
/* with a spy active all calls from pre to post methods are threadsave */
static CRITICAL_SECTION IMalloc32_SpyCS;
static CRITICAL_SECTION_DEBUG critsect_debug =
{
0, 0, &IMalloc32_SpyCS,
{ &critsect_debug.ProcessLocksList, &critsect_debug.ProcessLocksList },
0, 0, { (DWORD_PTR)(__FILE__ ": IMalloc32_SpyCS") }
};
static CRITICAL_SECTION IMalloc32_SpyCS = { &critsect_debug, -1, 0, 0, 0, 0 };
/* resize the old table */
static int SetSpyedBlockTableLength ( int NewLength )
{
LPVOID *NewSpyedBlocks;
if (!Malloc32.SpyedBlocks) NewSpyedBlocks = LocalAlloc(LMEM_ZEROINIT, NewLength * sizeof(PVOID));
else NewSpyedBlocks = LocalReAlloc(Malloc32.SpyedBlocks, NewLength * sizeof(PVOID), LMEM_ZEROINIT);
if (NewSpyedBlocks) {
Malloc32.SpyedBlocks = NewSpyedBlocks;
Malloc32.SpyedBlockTableLength = NewLength;
}
return NewSpyedBlocks != NULL;
}
/* add a location to the table */
static int AddMemoryLocation(LPVOID * pMem)
{
LPVOID * Current;
/* allocate the table if not already allocated */
if (!Malloc32.SpyedBlockTableLength) {
if (!SetSpyedBlockTableLength(0x1000)) return 0;
}
/* find a free location */
Current = Malloc32.SpyedBlocks;
while (*Current) {
Current++;
if (Current >= Malloc32.SpyedBlocks + Malloc32.SpyedBlockTableLength) {
/* no more space in table, grow it */
if (!SetSpyedBlockTableLength( Malloc32.SpyedBlockTableLength + 0x1000 )) return 0;
}
};
/* put the location in our table */
*Current = pMem;
Malloc32.SpyedAllocationsLeft++;
/*TRACE("%lu\n",Malloc32.SpyedAllocationsLeft);*/
return 1;
}
static int RemoveMemoryLocation(LPVOID * pMem)
{
LPVOID * Current;
/* allocate the table if not already allocated */
if (!Malloc32.SpyedBlockTableLength) {
if (!SetSpyedBlockTableLength(0x1000)) return 0;
}
Current = Malloc32.SpyedBlocks;
/* find the location */
while (*Current != pMem) {
Current++;
if (Current >= Malloc32.SpyedBlocks + Malloc32.SpyedBlockTableLength) return 0; /* not found */
}
/* location found */
Malloc32.SpyedAllocationsLeft--;
/*TRACE("%lu\n",Malloc32.SpyedAllocationsLeft);*/
*Current = NULL;
return 1;
}
/******************************************************************************
* IMalloc32_QueryInterface [VTABLE]
*/
static HRESULT WINAPI IMalloc_fnQueryInterface(LPMALLOC iface,REFIID refiid,LPVOID *obj) {
TRACE("(%s,%p)\n",debugstr_guid(refiid),obj);
if (IsEqualIID(&IID_IUnknown,refiid) || IsEqualIID(&IID_IMalloc,refiid)) {
*obj = (LPMALLOC)&Malloc32;
return S_OK;
}
return E_NOINTERFACE;
}
/******************************************************************************
* IMalloc32_AddRefRelease [VTABLE]
*/
static ULONG WINAPI IMalloc_fnAddRefRelease (LPMALLOC iface) {
return 1;
}
/******************************************************************************
* IMalloc32_Alloc [VTABLE]
*/
static LPVOID WINAPI IMalloc_fnAlloc(LPMALLOC iface, DWORD cb) {
LPVOID addr;
TRACE("(%ld)\n",cb);
if(Malloc32.pSpy) {
DWORD preAllocResult;
EnterCriticalSection(&IMalloc32_SpyCS);
preAllocResult = IMallocSpy_PreAlloc(Malloc32.pSpy, cb);
if ((cb != 0) && (preAllocResult == 0)) {
/* PreAlloc can force Alloc to fail, but not if cb == 0 */
TRACE("returning null\n");
LeaveCriticalSection(&IMalloc32_SpyCS);
return NULL;
}
}
addr = HeapAlloc(GetProcessHeap(),0,cb);
if(Malloc32.pSpy) {
addr = IMallocSpy_PostAlloc(Malloc32.pSpy, addr);
if (addr) AddMemoryLocation(addr);
LeaveCriticalSection(&IMalloc32_SpyCS);
}
TRACE("--(%p)\n",addr);
return addr;
}
/******************************************************************************
* IMalloc32_Realloc [VTABLE]
*/
static LPVOID WINAPI IMalloc_fnRealloc(LPMALLOC iface,LPVOID pv,DWORD cb) {
LPVOID pNewMemory;
TRACE("(%p,%ld)\n",pv,cb);
if(Malloc32.pSpy) {
LPVOID pRealMemory;
BOOL fSpyed;
EnterCriticalSection(&IMalloc32_SpyCS);
fSpyed = RemoveMemoryLocation(pv);
cb = IMallocSpy_PreRealloc(Malloc32.pSpy, pv, cb, &pRealMemory, fSpyed);
/* check if can release the spy */
if(Malloc32.SpyReleasePending && !Malloc32.SpyedAllocationsLeft) {
IMallocSpy_Release(Malloc32.pSpy);
Malloc32.SpyReleasePending = FALSE;
Malloc32.pSpy = NULL;
}
if (0==cb) {
/* PreRealloc can force Realloc to fail */
LeaveCriticalSection(&IMalloc32_SpyCS);
return NULL;
}
pv = pRealMemory;
}
if (!pv) pNewMemory = HeapAlloc(GetProcessHeap(),0,cb);
else if (cb) pNewMemory = HeapReAlloc(GetProcessHeap(),0,pv,cb);
else {
HeapFree(GetProcessHeap(),0,pv);
pNewMemory = NULL;
}
if(Malloc32.pSpy) {
pNewMemory = IMallocSpy_PostRealloc(Malloc32.pSpy, pNewMemory, TRUE);
if (pNewMemory) AddMemoryLocation(pNewMemory);
LeaveCriticalSection(&IMalloc32_SpyCS);
}
TRACE("--(%p)\n",pNewMemory);
return pNewMemory;
}
/******************************************************************************
* IMalloc32_Free [VTABLE]
*/
static VOID WINAPI IMalloc_fnFree(LPMALLOC iface,LPVOID pv) {
BOOL fSpyed = 0;
TRACE("(%p)\n",pv);
if(Malloc32.pSpy) {
EnterCriticalSection(&IMalloc32_SpyCS);
fSpyed = RemoveMemoryLocation(pv);
pv = IMallocSpy_PreFree(Malloc32.pSpy, pv, fSpyed);
}
HeapFree(GetProcessHeap(),0,pv);
if(Malloc32.pSpy) {
IMallocSpy_PostFree(Malloc32.pSpy, fSpyed);
/* check if can release the spy */
if(Malloc32.SpyReleasePending && !Malloc32.SpyedAllocationsLeft) {
IMallocSpy_Release(Malloc32.pSpy);
Malloc32.SpyReleasePending = FALSE;
Malloc32.pSpy = NULL;
}
LeaveCriticalSection(&IMalloc32_SpyCS);
}
}
/******************************************************************************
* IMalloc32_GetSize [VTABLE]
*
* NOTES
* FIXME returns:
* win95: size allocated (4 byte boundarys)
* win2k: size originally requested !!! (allocated on 8 byte boundarys)
*/
static DWORD WINAPI IMalloc_fnGetSize(LPMALLOC iface,LPVOID pv) {
DWORD cb;
BOOL fSpyed = 0;
TRACE("(%p)\n",pv);
if(Malloc32.pSpy) {
EnterCriticalSection(&IMalloc32_SpyCS);
pv = IMallocSpy_PreGetSize(Malloc32.pSpy, pv, fSpyed);
}
cb = HeapSize(GetProcessHeap(),0,pv);
if(Malloc32.pSpy) {
cb = IMallocSpy_PostGetSize(Malloc32.pSpy, cb, fSpyed);
LeaveCriticalSection(&IMalloc32_SpyCS);
}
return cb;
}
/******************************************************************************
* IMalloc32_DidAlloc [VTABLE]
*/
static INT WINAPI IMalloc_fnDidAlloc(LPMALLOC iface,LPVOID pv) {
BOOL fSpyed = 0;
int didAlloc;
TRACE("(%p)\n",pv);
if(Malloc32.pSpy) {
EnterCriticalSection(&IMalloc32_SpyCS);
pv = IMallocSpy_PreDidAlloc(Malloc32.pSpy, pv, fSpyed);
}
didAlloc = -1;
if(Malloc32.pSpy) {
didAlloc = IMallocSpy_PostDidAlloc(Malloc32.pSpy, pv, fSpyed, didAlloc);
LeaveCriticalSection(&IMalloc32_SpyCS);
}
return didAlloc;
}
/******************************************************************************
* IMalloc32_HeapMinimize [VTABLE]
*/
static VOID WINAPI IMalloc_fnHeapMinimize(LPMALLOC iface) {
TRACE("()\n");
if(Malloc32.pSpy) {
EnterCriticalSection(&IMalloc32_SpyCS);
IMallocSpy_PreHeapMinimize(Malloc32.pSpy);
}
if(Malloc32.pSpy) {
IMallocSpy_PostHeapMinimize(Malloc32.pSpy);
LeaveCriticalSection(&IMalloc32_SpyCS);
}
}
static const IMallocVtbl VT_IMalloc32 =
{
IMalloc_fnQueryInterface,
IMalloc_fnAddRefRelease,
IMalloc_fnAddRefRelease,
IMalloc_fnAlloc,
IMalloc_fnRealloc,
IMalloc_fnFree,
IMalloc_fnGetSize,
IMalloc_fnDidAlloc,
IMalloc_fnHeapMinimize
};
/******************************************************************************
* IMallocSpy implementation
*****************************************************************************/
/* set the vtable later */
static const IMallocSpyVtbl VT_IMallocSpy;
typedef struct {
const IMallocSpyVtbl *lpVtbl;
LONG ref;
} _MallocSpy;
/* this is the static object instance */
static _MallocSpy MallocSpy = {&VT_IMallocSpy, 0};
/******************************************************************************
* IMalloc32_QueryInterface [VTABLE]
*/
static HRESULT WINAPI IMallocSpy_fnQueryInterface(LPMALLOCSPY iface,REFIID refiid,LPVOID *obj)
{
TRACE("(%s,%p)\n",debugstr_guid(refiid),obj);
if (IsEqualIID(&IID_IUnknown,refiid) || IsEqualIID(&IID_IMallocSpy,refiid)) {
*obj = (LPMALLOC)&MallocSpy;
return S_OK;
}
return E_NOINTERFACE;
}
/******************************************************************************
* IMalloc32_AddRef [VTABLE]
*/
static ULONG WINAPI IMallocSpy_fnAddRef (LPMALLOCSPY iface)
{
_MallocSpy *This = (_MallocSpy *)iface;
ULONG ref = InterlockedIncrement(&This->ref);
TRACE ("(%p)->(count=%lu)\n", This, ref - 1);
return ref;
}
/******************************************************************************
* IMalloc32_AddRelease [VTABLE]
*
* NOTES
* Our MallocSpy is static. If the count reaches 0 we dump the leaks
*/
static ULONG WINAPI IMallocSpy_fnRelease (LPMALLOCSPY iface)
{
_MallocSpy *This = (_MallocSpy *)iface;
ULONG ref = InterlockedDecrement(&This->ref);
TRACE ("(%p)->(count=%lu)\n", This, ref + 1);
if (!ref) {
/* our allocation list MUST be empty here */
}
return ref;
}
static ULONG WINAPI IMallocSpy_fnPreAlloc(LPMALLOCSPY iface, ULONG cbRequest)
{
_MallocSpy *This = (_MallocSpy *)iface;
TRACE ("(%p)->(%lu)\n", This, cbRequest);
return cbRequest;
}
static PVOID WINAPI IMallocSpy_fnPostAlloc(LPMALLOCSPY iface, void* pActual)
{
_MallocSpy *This = (_MallocSpy *)iface;
TRACE ("(%p)->(%p)\n", This, pActual);
return pActual;
}
static PVOID WINAPI IMallocSpy_fnPreFree(LPMALLOCSPY iface, void* pRequest, BOOL fSpyed)
{
_MallocSpy *This = (_MallocSpy *)iface;
TRACE ("(%p)->(%p %u)\n", This, pRequest, fSpyed);
return pRequest;
}
static void WINAPI IMallocSpy_fnPostFree(LPMALLOCSPY iface, BOOL fSpyed)
{
_MallocSpy *This = (_MallocSpy *)iface;
TRACE ("(%p)->(%u)\n", This, fSpyed);
}
static ULONG WINAPI IMallocSpy_fnPreRealloc(LPMALLOCSPY iface, void* pRequest, ULONG cbRequest, void** ppNewRequest, BOOL fSpyed)
{
_MallocSpy *This = (_MallocSpy *)iface;
TRACE ("(%p)->(%p %lu %u)\n", This, pRequest, cbRequest, fSpyed);
*ppNewRequest = pRequest;
return cbRequest;
}
static PVOID WINAPI IMallocSpy_fnPostRealloc(LPMALLOCSPY iface, void* pActual, BOOL fSpyed)
{
_MallocSpy *This = (_MallocSpy *)iface;
TRACE ("(%p)->(%p %u)\n", This, pActual, fSpyed);
return pActual;
}
static PVOID WINAPI IMallocSpy_fnPreGetSize(LPMALLOCSPY iface, void* pRequest, BOOL fSpyed)
{
_MallocSpy *This = (_MallocSpy *)iface;
TRACE ("(%p)->(%p %u)\n", This, pRequest, fSpyed);
return pRequest;
}
static ULONG WINAPI IMallocSpy_fnPostGetSize(LPMALLOCSPY iface, ULONG cbActual, BOOL fSpyed)
{
_MallocSpy *This = (_MallocSpy *)iface;
TRACE ("(%p)->(%lu %u)\n", This, cbActual, fSpyed);
return cbActual;
}
static PVOID WINAPI IMallocSpy_fnPreDidAlloc(LPMALLOCSPY iface, void* pRequest, BOOL fSpyed)
{
_MallocSpy *This = (_MallocSpy *)iface;
TRACE ("(%p)->(%p %u)\n", This, pRequest, fSpyed);
return pRequest;
}
static int WINAPI IMallocSpy_fnPostDidAlloc(LPMALLOCSPY iface, void* pRequest, BOOL fSpyed, int fActual)
{
_MallocSpy *This = (_MallocSpy *)iface;
TRACE ("(%p)->(%p %u %u)\n", This, pRequest, fSpyed, fActual);
return fActual;
}
static void WINAPI IMallocSpy_fnPreHeapMinimize(LPMALLOCSPY iface)
{
_MallocSpy *This = (_MallocSpy *)iface;
TRACE ("(%p)->()\n", This);
}
static void WINAPI IMallocSpy_fnPostHeapMinimize(LPMALLOCSPY iface)
{
_MallocSpy *This = (_MallocSpy *)iface;
TRACE ("(%p)->()\n", This);
}
static void MallocSpyDumpLeaks(void) {
TRACE("leaks: %lu\n", Malloc32.SpyedAllocationsLeft);
}
static const IMallocSpyVtbl VT_IMallocSpy =
{
IMallocSpy_fnQueryInterface,
IMallocSpy_fnAddRef,
IMallocSpy_fnRelease,
IMallocSpy_fnPreAlloc,
IMallocSpy_fnPostAlloc,
IMallocSpy_fnPreFree,
IMallocSpy_fnPostFree,
IMallocSpy_fnPreRealloc,
IMallocSpy_fnPostRealloc,
IMallocSpy_fnPreGetSize,
IMallocSpy_fnPostGetSize,
IMallocSpy_fnPreDidAlloc,
IMallocSpy_fnPostDidAlloc,
IMallocSpy_fnPreHeapMinimize,
IMallocSpy_fnPostHeapMinimize
};
/******************************************************************************
* CoGetMalloc [OLE32.@]
*
* Retrieves the current IMalloc interface for the process.
*
* PARAMS
* dwMemContext [I]
* lpMalloc [O] Address where memory allocator object will be stored.
*
* RETURNS
* Success: S_OK.
* Failure: HRESULT code.
*/
HRESULT WINAPI CoGetMalloc(DWORD dwMemContext, LPMALLOC *lpMalloc)
{
*lpMalloc = (LPMALLOC)&Malloc32;
return S_OK;
}
/***********************************************************************
* CoTaskMemAlloc [OLE32.@]
*
* Allocates memory using the current process memory allocator.
*
* PARAMS
* size [I] Size of the memory block to allocate.
*
* RETURNS
* Success: Pointer to newly allocated memory block.
* Failure: NULL.
*/
LPVOID WINAPI CoTaskMemAlloc(ULONG size)
{
return IMalloc_Alloc((LPMALLOC)&Malloc32,size);
}
/***********************************************************************
* CoTaskMemFree [OLE32.@]
*
* Frees memory allocated from the current process memory allocator.
*
* PARAMS
* ptr [I] Memory block to free.
*
* RETURNS
* Nothing.
*/
VOID WINAPI CoTaskMemFree(LPVOID ptr)
{
IMalloc_Free((LPMALLOC)&Malloc32, ptr);
}
/***********************************************************************
* CoTaskMemRealloc [OLE32.@]
*
* Allocates memory using the current process memory allocator.
*
* PARAMS
* pvOld [I] Pointer to old memory block.
* size [I] Size of the new memory block.
*
* RETURNS
* Success: Pointer to newly allocated memory block.
* Failure: NULL.
*/
LPVOID WINAPI CoTaskMemRealloc(LPVOID pvOld, ULONG size)
{
return IMalloc_Realloc((LPMALLOC)&Malloc32, pvOld, size);
}
/***********************************************************************
* CoRegisterMallocSpy [OLE32.@]
*
* Registers an object that receives notifications on memory allocations and
* frees.
*
* PARAMS
* pMallocSpy [I] New spy object.
*
* RETURNS
* Success: S_OK.
* Failure: HRESULT code.
*
* NOTES
* if a mallocspy is already registered, we can't do it again since
* only the spy knows, how to free a memory block
*/
HRESULT WINAPI CoRegisterMallocSpy(LPMALLOCSPY pMallocSpy)
{
IMallocSpy* pSpy;
HRESULT hres = E_INVALIDARG;
TRACE("\n");
/* HACK TO ACTIVATE OUT SPY */
if (pMallocSpy == (LPVOID)-1) pMallocSpy =(IMallocSpy*)&MallocSpy;
if(Malloc32.pSpy) return CO_E_OBJISREG;
EnterCriticalSection(&IMalloc32_SpyCS);
if (SUCCEEDED(IUnknown_QueryInterface(pMallocSpy, &IID_IMallocSpy, (LPVOID*)&pSpy))) {
Malloc32.pSpy = pSpy;
hres = S_OK;
}
LeaveCriticalSection(&IMalloc32_SpyCS);
return hres;
}
/***********************************************************************
* CoRevokeMallocSpy [OLE32.@]
*
* Revokes a previousl registered object that receives notifications on memory
* allocations and frees.
*
* PARAMS
* pMallocSpy [I] New spy object.
*
* RETURNS
* Success: S_OK.
* Failure: HRESULT code.
*
* NOTES
* we can't revoke a malloc spy as long as memory blocks allocated with
* the spy are active since only the spy knows how to free them
*/
HRESULT WINAPI CoRevokeMallocSpy(void)
{
HRESULT hres = S_OK;
TRACE("\n");
EnterCriticalSection(&IMalloc32_SpyCS);
/* if it's our spy it's time to dump the leaks */
if (Malloc32.pSpy == (IMallocSpy*)&MallocSpy) {
MallocSpyDumpLeaks();
}
if (Malloc32.SpyedAllocationsLeft) {
TRACE("SpyReleasePending with %lu allocations left\n", Malloc32.SpyedAllocationsLeft);
Malloc32.SpyReleasePending = TRUE;
hres = E_ACCESSDENIED;
} else {
IMallocSpy_Release(Malloc32.pSpy);
Malloc32.pSpy = NULL;
}
LeaveCriticalSection(&IMalloc32_SpyCS);
return S_OK;
}
/******************************************************************************
* IsValidInterface [OLE32.@]
*
* Determines whether a pointer is a valid interface.
*
* PARAMS
* punk [I] Interface to be tested.
*
* RETURNS
* TRUE, if the passed pointer is a valid interface, or FALSE otherwise.
*/
BOOL WINAPI IsValidInterface(LPUNKNOWN punk)
{
return !(
IsBadReadPtr(punk,4) ||
IsBadReadPtr(punk->lpVtbl,4) ||
IsBadReadPtr(punk->lpVtbl->QueryInterface,9) ||
IsBadCodePtr((FARPROC)punk->lpVtbl->QueryInterface)
);
}
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