/* * 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 { IMalloc IMalloc_iface; 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 */ DWORD 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 ( DWORD 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 */ DWORD old_length = Malloc32.SpyedBlockTableLength; if (!SetSpyedBlockTableLength( Malloc32.SpyedBlockTableLength + 0x1000 )) return 0; Current = Malloc32.SpyedBlocks + old_length; } }; /* put the location in our table */ *Current = pMem; Malloc32.SpyedAllocationsLeft++; /*TRACE("%lu\n",Malloc32.SpyedAllocationsLeft);*/ return 1; } static int RemoveMemoryLocation(LPCVOID 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 = &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("(%d)\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,%d)\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 }; /****************************************************************************** * 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 = &Malloc32.IMalloc_iface; 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(&Malloc32.IMalloc_iface,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(&Malloc32.IMalloc_iface, 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(&Malloc32.IMalloc_iface, 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"); 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 previously 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 (Malloc32.SpyedAllocationsLeft) { TRACE("SpyReleasePending with %u allocations left\n", Malloc32.SpyedAllocationsLeft); Malloc32.SpyReleasePending = TRUE; hres = E_ACCESSDENIED; } else { IMallocSpy_Release(Malloc32.pSpy); Malloc32.pSpy = NULL; } 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) ); }