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