570 lines
15 KiB
C
570 lines
15 KiB
C
/*
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* basic interfaces
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*
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* Copyright 1997 Marcus Meissner
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#include <ctype.h>
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#include <stdarg.h>
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#include <stdlib.h>
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#include <string.h>
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#include <assert.h>
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#define COBJMACROS
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#include "windef.h"
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#include "winbase.h"
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#include "winuser.h"
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#include "ole2.h"
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#include "winerror.h"
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#include "wine/debug.h"
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WINE_DEFAULT_DEBUG_CHANNEL(olemalloc);
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/******************************************************************************
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* IMalloc32 implementation
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*
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* NOTES
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* For supporting CoRegisterMallocSpy the IMalloc implementation must know if
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* a given memory block was allocated with a spy active.
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*
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*****************************************************************************/
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/* set the vtable later */
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static const IMallocVtbl VT_IMalloc32;
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struct allocator
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{
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IMalloc IMalloc_iface;
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IMallocSpy * pSpy; /* the spy when active */
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DWORD SpyedAllocationsLeft; /* number of spyed allocations left */
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BOOL SpyReleasePending; /* CoRevokeMallocSpy called with spyed allocations left*/
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LPVOID * SpyedBlocks; /* root of the table */
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DWORD SpyedBlockTableLength;/* size of the table*/
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};
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static struct allocator Malloc32 = { .IMalloc_iface.lpVtbl = &VT_IMalloc32 };
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/* with a spy active all calls from pre to post methods are threadsafe */
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static CRITICAL_SECTION IMalloc32_SpyCS;
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static CRITICAL_SECTION_DEBUG critsect_debug =
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{
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0, 0, &IMalloc32_SpyCS,
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{ &critsect_debug.ProcessLocksList, &critsect_debug.ProcessLocksList },
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0, 0, { (DWORD_PTR)(__FILE__ ": IMalloc32_SpyCS") }
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};
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static CRITICAL_SECTION IMalloc32_SpyCS = { &critsect_debug, -1, 0, 0, 0, 0 };
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/* resize the old table */
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static BOOL SetSpyedBlockTableLength ( DWORD NewLength )
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{
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LPVOID *NewSpyedBlocks;
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if (!Malloc32.SpyedBlocks) NewSpyedBlocks = LocalAlloc(LMEM_ZEROINIT, NewLength * sizeof(PVOID));
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else NewSpyedBlocks = LocalReAlloc(Malloc32.SpyedBlocks, NewLength * sizeof(PVOID), LMEM_ZEROINIT | LMEM_MOVEABLE);
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if (NewSpyedBlocks) {
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Malloc32.SpyedBlocks = NewSpyedBlocks;
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Malloc32.SpyedBlockTableLength = NewLength;
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}
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return NewSpyedBlocks != NULL;
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}
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/* add a location to the table */
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static BOOL AddMemoryLocation(LPVOID * pMem)
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{
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LPVOID * Current;
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/* allocate the table if not already allocated */
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if (!Malloc32.SpyedBlockTableLength && !SetSpyedBlockTableLength(0x1000))
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return FALSE;
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/* find a free location */
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Current = Malloc32.SpyedBlocks;
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while (*Current) {
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Current++;
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if (Current >= Malloc32.SpyedBlocks + Malloc32.SpyedBlockTableLength) {
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/* no more space in table, grow it */
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DWORD old_length = Malloc32.SpyedBlockTableLength;
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if (!SetSpyedBlockTableLength( Malloc32.SpyedBlockTableLength + 0x1000))
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return FALSE;
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Current = Malloc32.SpyedBlocks + old_length;
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}
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};
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/* put the location in our table */
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*Current = pMem;
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Malloc32.SpyedAllocationsLeft++;
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/*TRACE("%lu\n",Malloc32.SpyedAllocationsLeft);*/
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return TRUE;
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}
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static void** mallocspy_is_allocation_spyed(const void *mem)
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{
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void **current = Malloc32.SpyedBlocks;
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while (*current != mem)
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{
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current++;
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if (current >= Malloc32.SpyedBlocks + Malloc32.SpyedBlockTableLength)
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return NULL;
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}
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return current;
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}
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static BOOL mallocspy_remove_spyed_memory(const void *mem)
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{
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void **current;
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if (!Malloc32.SpyedBlockTableLength)
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return FALSE;
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if (!(current = mallocspy_is_allocation_spyed(mem)))
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return FALSE;
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Malloc32.SpyedAllocationsLeft--;
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*current = NULL;
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return TRUE;
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}
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/******************************************************************************
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* IMalloc32_QueryInterface [VTABLE]
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*/
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static HRESULT WINAPI IMalloc_fnQueryInterface(IMalloc *iface, REFIID refiid, void **obj)
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{
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TRACE("(%s,%p)\n",debugstr_guid(refiid),obj);
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if (IsEqualIID(&IID_IUnknown,refiid) || IsEqualIID(&IID_IMalloc,refiid)) {
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*obj = &Malloc32;
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return S_OK;
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}
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return E_NOINTERFACE;
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}
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/******************************************************************************
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* IMalloc32_AddRefRelease [VTABLE]
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*/
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static ULONG WINAPI IMalloc_fnAddRefRelease(IMalloc *iface)
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{
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return 1;
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}
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/******************************************************************************
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* IMalloc32_Alloc [VTABLE]
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*/
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static void * WINAPI IMalloc_fnAlloc(IMalloc *iface, SIZE_T cb)
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{
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void *addr;
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TRACE("(%ld)\n",cb);
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if(Malloc32.pSpy) {
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SIZE_T preAllocResult;
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EnterCriticalSection(&IMalloc32_SpyCS);
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preAllocResult = IMallocSpy_PreAlloc(Malloc32.pSpy, cb);
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if ((cb != 0) && (preAllocResult == 0)) {
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/* PreAlloc can force Alloc to fail, but not if cb == 0 */
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TRACE("returning null\n");
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LeaveCriticalSection(&IMalloc32_SpyCS);
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return NULL;
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}
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}
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addr = HeapAlloc(GetProcessHeap(),0,cb);
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if(Malloc32.pSpy) {
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addr = IMallocSpy_PostAlloc(Malloc32.pSpy, addr);
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if (addr) AddMemoryLocation(addr);
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LeaveCriticalSection(&IMalloc32_SpyCS);
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}
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TRACE("--(%p)\n",addr);
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return addr;
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}
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/******************************************************************************
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* IMalloc32_Realloc [VTABLE]
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*/
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static void * WINAPI IMalloc_fnRealloc(IMalloc *iface, void *pv, SIZE_T cb)
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{
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void *pNewMemory;
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TRACE("(%p,%ld)\n",pv,cb);
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if(Malloc32.pSpy) {
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void *pRealMemory;
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BOOL fSpyed;
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EnterCriticalSection(&IMalloc32_SpyCS);
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fSpyed = mallocspy_remove_spyed_memory(pv);
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cb = IMallocSpy_PreRealloc(Malloc32.pSpy, pv, cb, &pRealMemory, fSpyed);
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/* check if can release the spy */
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if(Malloc32.SpyReleasePending && !Malloc32.SpyedAllocationsLeft) {
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IMallocSpy_Release(Malloc32.pSpy);
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Malloc32.SpyReleasePending = FALSE;
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Malloc32.pSpy = NULL;
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LeaveCriticalSection(&IMalloc32_SpyCS);
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}
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if (0==cb) {
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/* PreRealloc can force Realloc to fail */
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if (Malloc32.pSpy)
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LeaveCriticalSection(&IMalloc32_SpyCS);
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return NULL;
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}
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pv = pRealMemory;
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}
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if (!pv) pNewMemory = HeapAlloc(GetProcessHeap(),0,cb);
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else if (cb) pNewMemory = HeapReAlloc(GetProcessHeap(),0,pv,cb);
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else {
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HeapFree(GetProcessHeap(),0,pv);
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pNewMemory = NULL;
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}
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if(Malloc32.pSpy) {
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pNewMemory = IMallocSpy_PostRealloc(Malloc32.pSpy, pNewMemory, TRUE);
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if (pNewMemory) AddMemoryLocation(pNewMemory);
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LeaveCriticalSection(&IMalloc32_SpyCS);
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}
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TRACE("--(%p)\n",pNewMemory);
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return pNewMemory;
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}
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/******************************************************************************
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* IMalloc32_Free [VTABLE]
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*/
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static void WINAPI IMalloc_fnFree(IMalloc *iface, void *mem)
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{
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BOOL spyed_block = FALSE, spy_active = FALSE;
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TRACE("(%p)\n", mem);
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if (!mem)
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return;
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if (Malloc32.pSpy)
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{
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EnterCriticalSection(&IMalloc32_SpyCS);
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spyed_block = mallocspy_remove_spyed_memory(mem);
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spy_active = TRUE;
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mem = IMallocSpy_PreFree(Malloc32.pSpy, mem, spyed_block);
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}
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HeapFree(GetProcessHeap(), 0, mem);
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if (spy_active)
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{
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IMallocSpy_PostFree(Malloc32.pSpy, spyed_block);
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/* check if can release the spy */
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if (Malloc32.SpyReleasePending && !Malloc32.SpyedAllocationsLeft)
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{
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IMallocSpy_Release(Malloc32.pSpy);
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Malloc32.SpyReleasePending = FALSE;
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Malloc32.pSpy = NULL;
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}
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LeaveCriticalSection(&IMalloc32_SpyCS);
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}
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}
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/******************************************************************************
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* IMalloc32_GetSize [VTABLE]
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*
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* NOTES
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* FIXME returns:
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* win95: size allocated (4 byte boundaries)
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* win2k: size originally requested !!! (allocated on 8 byte boundaries)
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*/
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static SIZE_T WINAPI IMalloc_fnGetSize(IMalloc *iface, void *mem)
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{
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BOOL spyed_block = FALSE, spy_active = FALSE;
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SIZE_T size;
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TRACE("(%p)\n", mem);
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if (!mem)
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return (SIZE_T)-1;
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if (Malloc32.pSpy)
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{
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EnterCriticalSection(&IMalloc32_SpyCS);
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spyed_block = !!mallocspy_is_allocation_spyed(mem);
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spy_active = TRUE;
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mem = IMallocSpy_PreGetSize(Malloc32.pSpy, mem, spyed_block);
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}
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size = HeapSize(GetProcessHeap(), 0, mem);
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if (spy_active)
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{
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size = IMallocSpy_PostGetSize(Malloc32.pSpy, size, spyed_block);
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LeaveCriticalSection(&IMalloc32_SpyCS);
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}
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return size;
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}
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/******************************************************************************
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* IMalloc32_DidAlloc [VTABLE]
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*/
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static INT WINAPI IMalloc_fnDidAlloc(IMalloc *iface, void *mem)
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{
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BOOL spyed_block = FALSE, spy_active = FALSE;
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int did_alloc;
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TRACE("(%p)\n", mem);
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if (!mem)
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return -1;
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if (Malloc32.pSpy)
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{
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EnterCriticalSection(&IMalloc32_SpyCS);
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spyed_block = !!mallocspy_is_allocation_spyed(mem);
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spy_active = TRUE;
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mem = IMallocSpy_PreDidAlloc(Malloc32.pSpy, mem, spyed_block);
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}
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did_alloc = HeapValidate(GetProcessHeap(), 0, mem);
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if (spy_active)
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{
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did_alloc = IMallocSpy_PostDidAlloc(Malloc32.pSpy, mem, spyed_block, did_alloc);
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LeaveCriticalSection(&IMalloc32_SpyCS);
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}
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return did_alloc;
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}
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/******************************************************************************
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* IMalloc32_HeapMinimize [VTABLE]
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*/
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static void WINAPI IMalloc_fnHeapMinimize(IMalloc *iface)
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{
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BOOL spy_active = FALSE;
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TRACE("()\n");
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if (Malloc32.pSpy)
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{
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EnterCriticalSection(&IMalloc32_SpyCS);
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spy_active = TRUE;
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IMallocSpy_PreHeapMinimize(Malloc32.pSpy);
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}
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if (spy_active)
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{
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IMallocSpy_PostHeapMinimize(Malloc32.pSpy);
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LeaveCriticalSection(&IMalloc32_SpyCS);
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}
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}
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static const IMallocVtbl VT_IMalloc32 =
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{
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IMalloc_fnQueryInterface,
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IMalloc_fnAddRefRelease,
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IMalloc_fnAddRefRelease,
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IMalloc_fnAlloc,
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IMalloc_fnRealloc,
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IMalloc_fnFree,
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IMalloc_fnGetSize,
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IMalloc_fnDidAlloc,
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IMalloc_fnHeapMinimize
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};
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/******************************************************************************
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* CoGetMalloc [OLE32.@]
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*
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* Retrieves the current IMalloc interface for the process.
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*
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* PARAMS
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* context [I] Should always be MEMCTX_TASK.
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* imalloc [O] Address where memory allocator object will be stored.
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*
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* RETURNS
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* Success: S_OK.
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* Failure: HRESULT code.
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*/
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HRESULT WINAPI CoGetMalloc(DWORD context, IMalloc **imalloc)
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{
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if (context != MEMCTX_TASK) {
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*imalloc = NULL;
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return E_INVALIDARG;
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}
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*imalloc = &Malloc32.IMalloc_iface;
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return S_OK;
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}
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/***********************************************************************
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* CoTaskMemAlloc [OLE32.@]
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*
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* Allocates memory using the current process memory allocator.
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*
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* PARAMS
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* size [I] Size of the memory block to allocate.
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*
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* RETURNS
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* Success: Pointer to newly allocated memory block.
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* Failure: NULL.
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*/
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LPVOID WINAPI CoTaskMemAlloc(SIZE_T size)
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{
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return IMalloc_Alloc(&Malloc32.IMalloc_iface,size);
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}
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/***********************************************************************
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* CoTaskMemFree [OLE32.@]
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*
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* Frees memory allocated from the current process memory allocator.
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*
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* PARAMS
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* ptr [I] Memory block to free.
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*
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* RETURNS
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* Nothing.
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*/
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VOID WINAPI CoTaskMemFree(LPVOID ptr)
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{
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IMalloc_Free(&Malloc32.IMalloc_iface, ptr);
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}
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/***********************************************************************
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* CoTaskMemRealloc [OLE32.@]
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*
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* Allocates memory using the current process memory allocator.
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*
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* PARAMS
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* pvOld [I] Pointer to old memory block.
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* size [I] Size of the new memory block.
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*
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* RETURNS
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* Success: Pointer to newly allocated memory block.
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* Failure: NULL.
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*/
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LPVOID WINAPI CoTaskMemRealloc(LPVOID pvOld, SIZE_T size)
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{
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return IMalloc_Realloc(&Malloc32.IMalloc_iface, pvOld, size);
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}
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/***********************************************************************
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* CoRegisterMallocSpy [OLE32.@]
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*
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* Registers an object that receives notifications on memory allocations and
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* frees.
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*
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* PARAMS
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* pMallocSpy [I] New spy object.
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*
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* RETURNS
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* Success: S_OK.
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* Failure: HRESULT code.
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*
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* NOTES
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* if a mallocspy is already registered, we can't do it again since
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* only the spy knows, how to free a memory block
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*/
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HRESULT WINAPI CoRegisterMallocSpy(LPMALLOCSPY pMallocSpy)
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{
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IMallocSpy* pSpy;
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HRESULT hres = E_INVALIDARG;
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TRACE("%p\n", pMallocSpy);
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if(!pMallocSpy) return E_INVALIDARG;
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EnterCriticalSection(&IMalloc32_SpyCS);
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if (Malloc32.pSpy)
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hres = CO_E_OBJISREG;
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else if (SUCCEEDED(IMallocSpy_QueryInterface(pMallocSpy, &IID_IMallocSpy, (void**)&pSpy))) {
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Malloc32.pSpy = pSpy;
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hres = S_OK;
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}
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LeaveCriticalSection(&IMalloc32_SpyCS);
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return hres;
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}
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/***********************************************************************
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* CoRevokeMallocSpy [OLE32.@]
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*
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* Revokes a previously registered object that receives notifications on memory
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* allocations and frees.
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*
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* PARAMS
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* pMallocSpy [I] New spy object.
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*
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* RETURNS
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* Success: S_OK.
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* Failure: HRESULT code.
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*
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* NOTES
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* we can't revoke a malloc spy as long as memory blocks allocated with
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* the spy are active since only the spy knows how to free them
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*/
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HRESULT WINAPI CoRevokeMallocSpy(void)
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{
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HRESULT hres = S_OK;
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TRACE("\n");
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EnterCriticalSection(&IMalloc32_SpyCS);
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if (!Malloc32.pSpy)
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hres = CO_E_OBJNOTREG;
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else if (Malloc32.SpyedAllocationsLeft) {
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TRACE("SpyReleasePending with %u allocations left\n", Malloc32.SpyedAllocationsLeft);
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Malloc32.SpyReleasePending = TRUE;
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hres = E_ACCESSDENIED;
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} else {
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IMallocSpy_Release(Malloc32.pSpy);
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Malloc32.pSpy = NULL;
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}
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LeaveCriticalSection(&IMalloc32_SpyCS);
|
|
|
|
return hres;
|
|
}
|
|
|
|
/******************************************************************************
|
|
* 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)
|
|
);
|
|
}
|