dlls/ole32/ifs.c

   1 /*
   2  *      basic interfaces
   3  *
   4  *      Copyright 1997  Marcus Meissner
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20
  21 #include "config.h"
  22
  23 #include <ctype.h>
  24 #include <stdarg.h>
  25 #include <stdlib.h>
  26 #include <string.h>
  27 #include <assert.h>
  28
  29 #define COBJMACROS
  30
  31 #include "windef.h"
  32 #include "winbase.h"
  33 #include "winuser.h"
  34 #include "ole2.h"
  35 #include "winerror.h"
  36
  37 #include "wine/debug.h"
  38
  39 WINE_DEFAULT_DEBUG_CHANNEL(olemalloc);
  40
  41 /******************************************************************************
  42  *      IMalloc32 implementation
  43  *
  44  * NOTES
  45  *  For supporting CoRegisterMallocSpy the IMalloc implementation must know if
  46  *  a given memory block was allocated with a spy active.
  47  *
  48  *****************************************************************************/
  49 /* set the vtable later */
  50 static IMallocVtbl VT_IMalloc32;
  51
  52 typedef struct {
  53         IMallocVtbl *lpVtbl;
  54         DWORD dummy;                /* nothing, we are static */
  55         IMallocSpy * pSpy;          /* the spy when active */
  56         DWORD SpyedAllocationsLeft; /* number of spyed allocations left */
  57         BOOL SpyReleasePending;     /* CoRevokeMallocSpy called with spyed allocations left*/
  58         LPVOID * SpyedBlocks;       /* root of the table */
  59         int SpyedBlockTableLength;  /* size of the table*/
  60 } _Malloc32;
  61
  62 /* this is the static object instance */
  63 _Malloc32 Malloc32 = {&VT_IMalloc32, 0, NULL, 0, 0, NULL, 0};
  64
  65 /* with a spy active all calls from pre to post methods are threadsave */
  66 static CRITICAL_SECTION IMalloc32_SpyCS;
  67 static CRITICAL_SECTION_DEBUG critsect_debug =
  68 {
  69     0, 0, &IMalloc32_SpyCS,
  70     { &critsect_debug.ProcessLocksList, &critsect_debug.ProcessLocksList },
  71       0, 0, { 0, (DWORD)(__FILE__ ": IMalloc32_SpyCS") }
  72 };
  73 static CRITICAL_SECTION IMalloc32_SpyCS = { &critsect_debug, -1, 0, 0, 0, 0 };
  74
  75 /* resize the old table */
  76 static int SetSpyedBlockTableLength ( int NewLength )
  77 {
  78         LPVOID *NewSpyedBlocks;
  79
  80         if (!Malloc32.SpyedBlocks) NewSpyedBlocks = LocalAlloc(GMEM_ZEROINIT, NewLength * sizeof(PVOID));
  81         else NewSpyedBlocks = LocalReAlloc(Malloc32.SpyedBlocks, NewLength * sizeof(PVOID), GMEM_ZEROINIT);
  82         if (NewSpyedBlocks) {
  83                 Malloc32.SpyedBlocks = NewSpyedBlocks;
  84                 Malloc32.SpyedBlockTableLength = NewLength;
  85         }
  86
  87         return NewSpyedBlocks != NULL;
  88 }
  89
  90 /* add a location to the table */
  91 static int AddMemoryLocation(LPVOID * pMem)
  92 {
  93         LPVOID * Current;
  94
  95         /* allocate the table if not already allocated */
  96         if (!Malloc32.SpyedBlockTableLength) {
  97             if (!SetSpyedBlockTableLength(0x1000)) return 0;
  98         }
  99
 100         /* find a free location */
 101         Current = Malloc32.SpyedBlocks;
 102         while (*Current) {
 103             Current++;
 104             if (Current >= Malloc32.SpyedBlocks + Malloc32.SpyedBlockTableLength) {
 105                 /* no more space in table, grow it */
 106                 if (!SetSpyedBlockTableLength( Malloc32.SpyedBlockTableLength + 0x1000 )) return 0;
 107             }
 108         };
 109
 110         /* put the location in our table */
 111         *Current = pMem;
 112         Malloc32.SpyedAllocationsLeft++;
 113         /*TRACE("%lu\n",Malloc32.SpyedAllocationsLeft);*/
 114         return 1;
 115 }
 116
 117 static int RemoveMemoryLocation(LPVOID * pMem)
 118 {
 119         LPVOID * Current;
 120
 121         /* allocate the table if not already allocated */
 122         if (!Malloc32.SpyedBlockTableLength) {
 123             if (!SetSpyedBlockTableLength(0x1000)) return 0;
 124         }
 125
 126         Current = Malloc32.SpyedBlocks;
 127
 128         /* find the location */
 129         while (*Current != pMem) {
 130             Current++;
 131             if (Current >= Malloc32.SpyedBlocks + Malloc32.SpyedBlockTableLength)  return 0;      /* not found  */
 132         }
 133
 134         /* location found */
 135         Malloc32.SpyedAllocationsLeft--;
 136         /*TRACE("%lu\n",Malloc32.SpyedAllocationsLeft);*/
 137         *Current = NULL;
 138         return 1;
 139 }
 140
 141 /******************************************************************************
 142  *      IMalloc32_QueryInterface        [VTABLE]
 143  */
 144 static HRESULT WINAPI IMalloc_fnQueryInterface(LPMALLOC iface,REFIID refiid,LPVOID *obj) {
 145
 146         TRACE("(%s,%p)\n",debugstr_guid(refiid),obj);
 147
 148         if (IsEqualIID(&IID_IUnknown,refiid) || IsEqualIID(&IID_IMalloc,refiid)) {
 149                 *obj = (LPMALLOC)&Malloc32;
 150                 return S_OK;
 151         }
 152         return E_NOINTERFACE;
 153 }
 154
 155 /******************************************************************************
 156  *      IMalloc32_AddRefRelease         [VTABLE]
 157  */
 158 static ULONG WINAPI IMalloc_fnAddRefRelease (LPMALLOC iface) {
 159         return 1;
 160 }
 161
 162 /******************************************************************************
 163  *      IMalloc32_Alloc                 [VTABLE]
 164  */
 165 static LPVOID WINAPI IMalloc_fnAlloc(LPMALLOC iface, DWORD cb) {
 166
 167         LPVOID addr;
 168
 169         TRACE("(%ld)\n",cb);
 170
 171         if(Malloc32.pSpy) {
 172             DWORD preAllocResult;
 173
 174             EnterCriticalSection(&IMalloc32_SpyCS);
 175             preAllocResult = IMallocSpy_PreAlloc(Malloc32.pSpy, cb);
 176             if ((cb != 0) && (preAllocResult == 0)) {
 177                 /* PreAlloc can force Alloc to fail, but not if cb == 0 */
 178                 TRACE("returning null\n");
 179                 LeaveCriticalSection(&IMalloc32_SpyCS);
 180                 return NULL;
 181             }
 182         }
 183
 184         addr = HeapAlloc(GetProcessHeap(),0,cb);
 185
 186         if(Malloc32.pSpy) {
 187             addr = IMallocSpy_PostAlloc(Malloc32.pSpy, addr);
 188             if (addr) AddMemoryLocation(addr);
 189             LeaveCriticalSection(&IMalloc32_SpyCS);
 190         }
 191
 192         TRACE("--(%p)\n",addr);
 193         return addr;
 194 }
 195
 196 /******************************************************************************
 197  * IMalloc32_Realloc [VTABLE]
 198  */
 199 static LPVOID WINAPI IMalloc_fnRealloc(LPMALLOC iface,LPVOID pv,DWORD cb) {
 200
 201         LPVOID pNewMemory;
 202
 203         TRACE("(%p,%ld)\n",pv,cb);
 204
 205         if(Malloc32.pSpy) {
 206             LPVOID pRealMemory;
 207             BOOL fSpyed;
 208
 209             EnterCriticalSection(&IMalloc32_SpyCS);
 210             fSpyed = RemoveMemoryLocation(pv);
 211             cb = IMallocSpy_PreRealloc(Malloc32.pSpy, pv, cb, &pRealMemory, fSpyed);
 212
 213             /* check if can release the spy */
 214             if(Malloc32.SpyReleasePending && !Malloc32.SpyedAllocationsLeft) {
 215                 IMallocSpy_Release(Malloc32.pSpy);
 216                 Malloc32.SpyReleasePending = FALSE;
 217                 Malloc32.pSpy = NULL;
 218             }
 219
 220             if (0==cb) {
 221                 /* PreRealloc can force Realloc to fail */
 222                 LeaveCriticalSection(&IMalloc32_SpyCS);
 223                 return NULL;
 224             }
 225             pv = pRealMemory;
 226         }
 227
 228         if (!pv) pNewMemory = HeapAlloc(GetProcessHeap(),0,cb);
 229         else if (cb) pNewMemory = HeapReAlloc(GetProcessHeap(),0,pv,cb);
 230         else {
 231             HeapFree(GetProcessHeap(),0,pv);
 232             pNewMemory = NULL;
 233         }
 234
 235         if(Malloc32.pSpy) {
 236             pNewMemory = IMallocSpy_PostRealloc(Malloc32.pSpy, pNewMemory, TRUE);
 237             if (pNewMemory) AddMemoryLocation(pNewMemory);
 238             LeaveCriticalSection(&IMalloc32_SpyCS);
 239         }
 240
 241         TRACE("--(%p)\n",pNewMemory);
 242         return pNewMemory;
 243 }
 244
 245 /******************************************************************************
 246  * IMalloc32_Free [VTABLE]
 247  */
 248 static VOID WINAPI IMalloc_fnFree(LPMALLOC iface,LPVOID pv) {
 249
 250         BOOL fSpyed = 0;
 251
 252         TRACE("(%p)\n",pv);
 253
 254         if(Malloc32.pSpy) {
 255             EnterCriticalSection(&IMalloc32_SpyCS);
 256             fSpyed = RemoveMemoryLocation(pv);
 257             pv = IMallocSpy_PreFree(Malloc32.pSpy, pv, fSpyed);
 258         }
 259
 260         HeapFree(GetProcessHeap(),0,pv);
 261
 262         if(Malloc32.pSpy) {
 263             IMallocSpy_PostFree(Malloc32.pSpy, fSpyed);
 264
 265             /* check if can release the spy */
 266             if(Malloc32.SpyReleasePending && !Malloc32.SpyedAllocationsLeft) {
 267                 IMallocSpy_Release(Malloc32.pSpy);
 268                 Malloc32.SpyReleasePending = FALSE;
 269                 Malloc32.pSpy = NULL;
 270             }
 271
 272             LeaveCriticalSection(&IMalloc32_SpyCS);
 273         }
 274 }
 275
 276 /******************************************************************************
 277  * IMalloc32_GetSize [VTABLE]
 278  *
 279  * NOTES
 280  *  FIXME returns:
 281  *      win95:  size allocated (4 byte boundarys)
 282  *      win2k:  size originally requested !!! (allocated on 8 byte boundarys)
 283  */
 284 static DWORD WINAPI IMalloc_fnGetSize(LPMALLOC iface,LPVOID pv) {
 285
 286         DWORD cb;
 287         BOOL fSpyed = 0;
 288
 289         TRACE("(%p)\n",pv);
 290
 291         if(Malloc32.pSpy) {
 292             EnterCriticalSection(&IMalloc32_SpyCS);
 293             pv = IMallocSpy_PreGetSize(Malloc32.pSpy, pv, fSpyed);
 294         }
 295
 296         cb = HeapSize(GetProcessHeap(),0,pv);
 297
 298         if(Malloc32.pSpy) {
 299             cb = IMallocSpy_PostGetSize(Malloc32.pSpy, cb, fSpyed);
 300             LeaveCriticalSection(&IMalloc32_SpyCS);
 301         }
 302
 303         return cb;
 304 }
 305
 306 /******************************************************************************
 307  * IMalloc32_DidAlloc [VTABLE]
 308  */
 309 static INT WINAPI IMalloc_fnDidAlloc(LPMALLOC iface,LPVOID pv) {
 310
 311         BOOL fSpyed = 0;
 312         int didAlloc;
 313
 314         TRACE("(%p)\n",pv);
 315
 316         if(Malloc32.pSpy) {
 317             EnterCriticalSection(&IMalloc32_SpyCS);
 318             pv = IMallocSpy_PreDidAlloc(Malloc32.pSpy, pv, fSpyed);
 319         }
 320
 321         didAlloc = -1;
 322
 323         if(Malloc32.pSpy) {
 324             didAlloc = IMallocSpy_PostDidAlloc(Malloc32.pSpy, pv, fSpyed, didAlloc);
 325             LeaveCriticalSection(&IMalloc32_SpyCS);
 326         }
 327         return didAlloc;
 328 }
 329
 330 /******************************************************************************
 331  * IMalloc32_HeapMinimize [VTABLE]
 332  */
 333 static VOID WINAPI IMalloc_fnHeapMinimize(LPMALLOC iface) {
 334         TRACE("()\n");
 335
 336         if(Malloc32.pSpy) {
 337             EnterCriticalSection(&IMalloc32_SpyCS);
 338             IMallocSpy_PreHeapMinimize(Malloc32.pSpy);
 339         }
 340
 341         if(Malloc32.pSpy) {
 342             IMallocSpy_PostHeapMinimize(Malloc32.pSpy);
 343             LeaveCriticalSection(&IMalloc32_SpyCS);
 344         }
 345 }
 346
 347 static IMallocVtbl VT_IMalloc32 =
 348 {
 349         IMalloc_fnQueryInterface,
 350         IMalloc_fnAddRefRelease,
 351         IMalloc_fnAddRefRelease,
 352         IMalloc_fnAlloc,
 353         IMalloc_fnRealloc,
 354         IMalloc_fnFree,
 355         IMalloc_fnGetSize,
 356         IMalloc_fnDidAlloc,
 357         IMalloc_fnHeapMinimize
 358 };
 359
 360 /******************************************************************************
 361  *      IMallocSpy implementation
 362  *****************************************************************************/
 363
 364 /* set the vtable later */
 365 static IMallocSpyVtbl VT_IMallocSpy;
 366
 367 typedef struct {
 368         IMallocSpyVtbl *lpVtbl;
 369         DWORD ref;
 370 } _MallocSpy;
 371
 372 /* this is the static object instance */
 373 _MallocSpy MallocSpy = {&VT_IMallocSpy, 0};
 374
 375 /******************************************************************************
 376  *      IMalloc32_QueryInterface        [VTABLE]
 377  */
 378 static HRESULT WINAPI IMallocSpy_fnQueryInterface(LPMALLOCSPY iface,REFIID refiid,LPVOID *obj)
 379 {
 380
 381         TRACE("(%s,%p)\n",debugstr_guid(refiid),obj);
 382
 383         if (IsEqualIID(&IID_IUnknown,refiid) || IsEqualIID(&IID_IMallocSpy,refiid)) {
 384                 *obj = (LPMALLOC)&MallocSpy;
 385                 return S_OK;
 386         }
 387         return E_NOINTERFACE;
 388 }
 389
 390 /******************************************************************************
 391  *      IMalloc32_AddRef                [VTABLE]
 392  */
 393 static ULONG WINAPI IMallocSpy_fnAddRef (LPMALLOCSPY iface)
 394 {
 395
 396     _MallocSpy *This = (_MallocSpy *)iface;
 397
 398     TRACE ("(%p)->(count=%lu)\n", This, This->ref);
 399
 400     return ++(This->ref);
 401 }
 402
 403 /******************************************************************************
 404  *      IMalloc32_AddRelease            [VTABLE]
 405  *
 406  * NOTES
 407  *   Our MallocSpy is static. If the count reaches 0 we dump the leaks
 408  */
 409 static ULONG WINAPI IMallocSpy_fnRelease (LPMALLOCSPY iface)
 410 {
 411
 412     _MallocSpy *This = (_MallocSpy *)iface;
 413
 414     TRACE ("(%p)->(count=%lu)\n", This, This->ref);
 415
 416     if (!--(This->ref)) {
 417         /* our allocation list MUST be empty here */
 418     }
 419     return This->ref;
 420 }
 421
 422 static ULONG WINAPI IMallocSpy_fnPreAlloc(LPMALLOCSPY iface, ULONG cbRequest)
 423 {
 424     _MallocSpy *This = (_MallocSpy *)iface;
 425     TRACE ("(%p)->(%lu)\n", This, cbRequest);
 426     return cbRequest;
 427 }
 428 static PVOID WINAPI IMallocSpy_fnPostAlloc(LPMALLOCSPY iface, void* pActual)
 429 {
 430     _MallocSpy *This = (_MallocSpy *)iface;
 431     TRACE ("(%p)->(%p)\n", This, pActual);
 432     return pActual;
 433 }
 434
 435 static PVOID WINAPI IMallocSpy_fnPreFree(LPMALLOCSPY iface, void* pRequest, BOOL fSpyed)
 436 {
 437     _MallocSpy *This = (_MallocSpy *)iface;
 438     TRACE ("(%p)->(%p %u)\n", This, pRequest, fSpyed);
 439     return pRequest;
 440 }
 441 static void  WINAPI IMallocSpy_fnPostFree(LPMALLOCSPY iface, BOOL fSpyed)
 442 {
 443     _MallocSpy *This = (_MallocSpy *)iface;
 444     TRACE ("(%p)->(%u)\n", This, fSpyed);
 445 }
 446
 447 static ULONG WINAPI IMallocSpy_fnPreRealloc(LPMALLOCSPY iface, void* pRequest, ULONG cbRequest, void** ppNewRequest, BOOL fSpyed)
 448 {
 449     _MallocSpy *This = (_MallocSpy *)iface;
 450     TRACE ("(%p)->(%p %lu %u)\n", This, pRequest, cbRequest, fSpyed);
 451     *ppNewRequest = pRequest;
 452     return cbRequest;
 453 }
 454
 455 static PVOID WINAPI IMallocSpy_fnPostRealloc(LPMALLOCSPY iface, void* pActual, BOOL fSpyed)
 456 {
 457     _MallocSpy *This = (_MallocSpy *)iface;
 458     TRACE ("(%p)->(%p %u)\n", This, pActual, fSpyed);
 459     return pActual;
 460 }
 461
 462 static PVOID WINAPI IMallocSpy_fnPreGetSize(LPMALLOCSPY iface, void* pRequest, BOOL fSpyed)
 463 {
 464     _MallocSpy *This = (_MallocSpy *)iface;
 465     TRACE ("(%p)->(%p %u)\n", This,  pRequest, fSpyed);
 466     return pRequest;
 467 }
 468
 469 static ULONG WINAPI IMallocSpy_fnPostGetSize(LPMALLOCSPY iface, ULONG cbActual, BOOL fSpyed)
 470 {
 471     _MallocSpy *This = (_MallocSpy *)iface;
 472     TRACE ("(%p)->(%lu %u)\n", This, cbActual, fSpyed);
 473     return cbActual;
 474 }
 475
 476 static PVOID WINAPI IMallocSpy_fnPreDidAlloc(LPMALLOCSPY iface, void* pRequest, BOOL fSpyed)
 477 {
 478     _MallocSpy *This = (_MallocSpy *)iface;
 479     TRACE ("(%p)->(%p %u)\n", This, pRequest, fSpyed);
 480     return pRequest;
 481 }
 482
 483 static int WINAPI IMallocSpy_fnPostDidAlloc(LPMALLOCSPY iface, void* pRequest, BOOL fSpyed, int fActual)
 484 {
 485     _MallocSpy *This = (_MallocSpy *)iface;
 486     TRACE ("(%p)->(%p %u %u)\n", This, pRequest, fSpyed, fActual);
 487     return fActual;
 488 }
 489
 490 static void WINAPI IMallocSpy_fnPreHeapMinimize(LPMALLOCSPY iface)
 491 {
 492     _MallocSpy *This = (_MallocSpy *)iface;
 493     TRACE ("(%p)->()\n", This);
 494 }
 495
 496 static void WINAPI IMallocSpy_fnPostHeapMinimize(LPMALLOCSPY iface)
 497 {
 498     _MallocSpy *This = (_MallocSpy *)iface;
 499     TRACE ("(%p)->()\n", This);
 500 }
 501
 502 static void MallocSpyDumpLeaks() {
 503         TRACE("leaks: %lu\n", Malloc32.SpyedAllocationsLeft);
 504 }
 505
 506 static IMallocSpyVtbl VT_IMallocSpy =
 507 {
 508         IMallocSpy_fnQueryInterface,
 509         IMallocSpy_fnAddRef,
 510         IMallocSpy_fnRelease,
 511         IMallocSpy_fnPreAlloc,
 512         IMallocSpy_fnPostAlloc,
 513         IMallocSpy_fnPreFree,
 514         IMallocSpy_fnPostFree,
 515         IMallocSpy_fnPreRealloc,
 516         IMallocSpy_fnPostRealloc,
 517         IMallocSpy_fnPreGetSize,
 518         IMallocSpy_fnPostGetSize,
 519         IMallocSpy_fnPreDidAlloc,
 520         IMallocSpy_fnPostDidAlloc,
 521         IMallocSpy_fnPreHeapMinimize,
 522         IMallocSpy_fnPostHeapMinimize
 523 };
 524
 525 /******************************************************************************
 526  *              CoGetMalloc     [OLE32.@]
 527  *
 528  * RETURNS
 529  *      The win32 IMalloc
 530  */
 531 HRESULT WINAPI CoGetMalloc(DWORD dwMemContext, LPMALLOC *lpMalloc)
 532 {
 533         *lpMalloc = (LPMALLOC)&Malloc32;
 534         return S_OK;
 535 }
 536
 537 /***********************************************************************
 538  *           CoTaskMemAlloc     [OLE32.@]
 539  * RETURNS
 540  *      pointer to newly allocated block
 541  */
 542 LPVOID WINAPI CoTaskMemAlloc(ULONG size)
 543 {
 544         return IMalloc_Alloc((LPMALLOC)&Malloc32,size);
 545 }
 546 /***********************************************************************
 547  *           CoTaskMemFree      [OLE32.@]
 548  */
 549 VOID WINAPI CoTaskMemFree(LPVOID ptr)
 550 {
 551         IMalloc_Free((LPMALLOC)&Malloc32, ptr);
 552 }
 553
 554 /***********************************************************************
 555  *           CoTaskMemRealloc   [OLE32.@]
 556  * RETURNS
 557  *      pointer to newly allocated block
 558  */
 559 LPVOID WINAPI CoTaskMemRealloc(LPVOID pvOld, ULONG size)
 560 {
 561         return IMalloc_Realloc((LPMALLOC)&Malloc32, pvOld, size);
 562 }
 563
 564 /***********************************************************************
 565  *           CoRegisterMallocSpy        [OLE32.@]
 566  *
 567  * NOTES
 568  *  if a mallocspy is already registered, we can't do it again since
 569  *  only the spy knows, how to free a memory block
 570  */
 571 HRESULT WINAPI CoRegisterMallocSpy(LPMALLOCSPY pMallocSpy)
 572 {
 573         IMallocSpy* pSpy;
 574         HRESULT hres = E_INVALIDARG;
 575
 576         TRACE("\n");
 577
 578         /* HACK TO ACTIVATE OUT SPY */
 579         if (pMallocSpy == (LPVOID)-1) pMallocSpy =(IMallocSpy*)&MallocSpy;
 580
 581         if(Malloc32.pSpy) return CO_E_OBJISREG;
 582
 583         EnterCriticalSection(&IMalloc32_SpyCS);
 584
 585         if (SUCCEEDED(IUnknown_QueryInterface(pMallocSpy, &IID_IMallocSpy, (LPVOID*)&pSpy))) {
 586             Malloc32.pSpy = pSpy;
 587             hres = S_OK;
 588         }
 589
 590         LeaveCriticalSection(&IMalloc32_SpyCS);
 591
 592         return hres;
 593 }
 594
 595 /***********************************************************************
 596  *           CoRevokeMallocSpy  [OLE32.@]
 597  *
 598  * NOTES
 599  *  we can't revoke a malloc spy as long as memory blocks allocated with
 600  *  the spy are active since only the spy knows how to free them
 601  */
 602 HRESULT WINAPI CoRevokeMallocSpy(void)
 603 {
 604         HRESULT hres = S_OK;
 605         TRACE("\n");
 606
 607         EnterCriticalSection(&IMalloc32_SpyCS);
 608
 609         /* if it's our spy it's time to dump the leaks */
 610         if (Malloc32.pSpy == (IMallocSpy*)&MallocSpy) {
 611             MallocSpyDumpLeaks();
 612         }
 613
 614         if (Malloc32.SpyedAllocationsLeft) {
 615             TRACE("SpyReleasePending with %lu allocations left\n", Malloc32.SpyedAllocationsLeft);
 616             Malloc32.SpyReleasePending = TRUE;
 617             hres = E_ACCESSDENIED;
 618         } else {
 619             IMallocSpy_Release(Malloc32.pSpy);
 620             Malloc32.pSpy = NULL;
 621         }
 622         LeaveCriticalSection(&IMalloc32_SpyCS);
 623
 624         return S_OK;
 625 }
 626
 627 /******************************************************************************
 628  *              IsValidInterface        [OLE32.@]
 629  *
 630  * RETURNS
 631  *  True, if the passed pointer is a valid interface
 632  */
 633 BOOL WINAPI IsValidInterface(
 634         LPUNKNOWN punk  /* [in] interface to be tested */
 635 ) {
 636         return !(
 637                 IsBadReadPtr(punk,4)                                    ||
 638                 IsBadReadPtr(punk->lpVtbl,4)                            ||
 639                 IsBadReadPtr(punk->lpVtbl->QueryInterface,9)    ||
 640                 IsBadCodePtr((FARPROC)punk->lpVtbl->QueryInterface)
 641         );
 642 }