4 * Copyright 1996 Alexandre Julliard
5 * Copyright 1998 Ulrich Weigand
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with this library; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
29 #ifdef HAVE_VALGRIND_MEMCHECK_H
30 #include <valgrind/memcheck.h>
33 #define NONAMELESSUNION
34 #define NONAMELESSSTRUCT
40 #include "wine/winbase16.h"
44 #include "wine/debug.h"
46 #include "wine/server_protocol.h"
48 WINE_DEFAULT_DEBUG_CHANNEL(heap);
50 /* Note: the heap data structures are based on what Pietrek describes in his
51 * book 'Windows 95 System Programming Secrets'. The layout is not exactly
52 * the same, but could be easily adapted if it turns out some programs
56 typedef struct tagARENA_INUSE
58 DWORD size; /* Block size; must be the first field */
59 DWORD magic; /* Magic number */
62 typedef struct tagARENA_FREE
64 DWORD size; /* Block size; must be the first field */
65 DWORD magic; /* Magic number */
66 struct tagARENA_FREE *next; /* Next free arena */
67 struct tagARENA_FREE *prev; /* Prev free arena */
70 #define ARENA_FLAG_FREE 0x00000001 /* flags OR'ed with arena size */
71 #define ARENA_FLAG_PREV_FREE 0x00000002
72 #define ARENA_SIZE_MASK (~3)
73 #define ARENA_INUSE_MAGIC 0x44455355 /* Value for arena 'magic' field */
74 #define ARENA_FREE_MAGIC 0x45455246 /* Value for arena 'magic' field */
76 #define ARENA_INUSE_FILLER 0x55
77 #define ARENA_FREE_FILLER 0xaa
79 #define ALIGNMENT 8 /* everything is aligned on 8 byte boundaries */
80 #define ROUND_SIZE(size) (((size) + ALIGNMENT - 1) & ~(ALIGNMENT-1))
82 #define QUIET 1 /* Suppress messages */
83 #define NOISY 0 /* Report all errors */
85 #define HEAP_NB_FREE_LISTS 4 /* Number of free lists */
87 /* Max size of the blocks on the free lists */
88 static const DWORD HEAP_freeListSizes[HEAP_NB_FREE_LISTS] =
90 0x20, 0x80, 0x200, ~0UL
101 typedef struct tagSUBHEAP
103 DWORD size; /* Size of the whole sub-heap */
104 DWORD commitSize; /* Committed size of the sub-heap */
105 DWORD headerSize; /* Size of the heap header */
106 struct tagSUBHEAP *next; /* Next sub-heap */
107 struct tagHEAP *heap; /* Main heap structure */
108 DWORD magic; /* Magic number */
111 #define SUBHEAP_MAGIC ((DWORD)('S' | ('U'<<8) | ('B'<<16) | ('H'<<24)))
113 typedef struct tagHEAP
115 SUBHEAP subheap; /* First sub-heap */
116 struct tagHEAP *next; /* Next heap for this process */
117 CRITICAL_SECTION critSection; /* Critical section for serialization */
118 FREE_LIST_ENTRY freeList[HEAP_NB_FREE_LISTS]; /* Free lists */
119 DWORD flags; /* Heap flags */
120 DWORD magic; /* Magic number */
123 #define HEAP_MAGIC ((DWORD)('H' | ('E'<<8) | ('A'<<16) | ('P'<<24)))
125 #define HEAP_DEF_SIZE 0x110000 /* Default heap size = 1Mb + 64Kb */
126 #define HEAP_MIN_BLOCK_SIZE (8+sizeof(ARENA_FREE)) /* Min. heap block size */
127 #define COMMIT_MASK 0xffff /* bitmask for commit/decommit granularity */
129 static HANDLE processHeap; /* main process heap */
131 static HEAP *firstHeap; /* head of secondary heaps list */
133 static BOOL HEAP_IsRealArena( HEAP *heapPtr, DWORD flags, LPCVOID block, BOOL quiet );
135 /* SetLastError for ntdll */
136 inline static void set_status( NTSTATUS status )
138 NtCurrentTeb()->LastErrorValue = RtlNtStatusToDosError( status );
141 /* mark a block of memory as free for debugging purposes */
142 static inline void mark_block_free( void *ptr, size_t size )
144 if (TRACE_ON(heap)) memset( ptr, ARENA_FREE_FILLER, size );
145 #ifdef VALGRIND_MAKE_NOACCESS
146 VALGRIND_DISCARD( VALGRIND_MAKE_NOACCESS( ptr, size ));
150 /* mark a block of memory as initialized for debugging purposes */
151 static inline void mark_block_initialized( void *ptr, size_t size )
153 #ifdef VALGRIND_MAKE_READABLE
154 VALGRIND_DISCARD( VALGRIND_MAKE_READABLE( ptr, size ));
158 /* mark a block of memory as uninitialized for debugging purposes */
159 static inline void mark_block_uninitialized( void *ptr, size_t size )
161 #ifdef VALGRIND_MAKE_WRITABLE
162 VALGRIND_DISCARD( VALGRIND_MAKE_WRITABLE( ptr, size ));
166 memset( ptr, ARENA_INUSE_FILLER, size );
167 #ifdef VALGRIND_MAKE_WRITABLE
168 /* make it uninitialized to valgrind again */
169 VALGRIND_DISCARD( VALGRIND_MAKE_WRITABLE( ptr, size ));
174 /* clear contents of a block of memory */
175 static inline void clear_block( void *ptr, size_t size )
177 mark_block_initialized( ptr, size );
178 memset( ptr, 0, size );
181 /***********************************************************************
184 void HEAP_Dump( HEAP *heap )
190 DPRINTF( "Heap: %08lx\n", (DWORD)heap );
191 DPRINTF( "Next: %08lx Sub-heaps: %08lx",
192 (DWORD)heap->next, (DWORD)&heap->subheap );
193 subheap = &heap->subheap;
194 while (subheap->next)
196 DPRINTF( " -> %08lx", (DWORD)subheap->next );
197 subheap = subheap->next;
200 DPRINTF( "\nFree lists:\n Block Stat Size Id\n" );
201 for (i = 0; i < HEAP_NB_FREE_LISTS; i++)
202 DPRINTF( "%08lx free %08lx prev=%08lx next=%08lx\n",
203 (DWORD)&heap->freeList[i].arena, heap->freeList[i].size,
204 (DWORD)heap->freeList[i].arena.prev,
205 (DWORD)heap->freeList[i].arena.next );
207 subheap = &heap->subheap;
210 DWORD freeSize = 0, usedSize = 0, arenaSize = subheap->headerSize;
211 DPRINTF( "\n\nSub-heap %08lx: size=%08lx committed=%08lx\n",
212 (DWORD)subheap, subheap->size, subheap->commitSize );
214 DPRINTF( "\n Block Stat Size Id\n" );
215 ptr = (char*)subheap + subheap->headerSize;
216 while (ptr < (char *)subheap + subheap->size)
218 if (*(DWORD *)ptr & ARENA_FLAG_FREE)
220 ARENA_FREE *pArena = (ARENA_FREE *)ptr;
221 DPRINTF( "%08lx free %08lx prev=%08lx next=%08lx\n",
222 (DWORD)pArena, pArena->size & ARENA_SIZE_MASK,
223 (DWORD)pArena->prev, (DWORD)pArena->next);
224 ptr += sizeof(*pArena) + (pArena->size & ARENA_SIZE_MASK);
225 arenaSize += sizeof(ARENA_FREE);
226 freeSize += pArena->size & ARENA_SIZE_MASK;
228 else if (*(DWORD *)ptr & ARENA_FLAG_PREV_FREE)
230 ARENA_INUSE *pArena = (ARENA_INUSE *)ptr;
231 DPRINTF( "%08lx Used %08lx back=%08lx\n",
232 (DWORD)pArena, pArena->size & ARENA_SIZE_MASK, *((DWORD *)pArena - 1) );
233 ptr += sizeof(*pArena) + (pArena->size & ARENA_SIZE_MASK);
234 arenaSize += sizeof(ARENA_INUSE);
235 usedSize += pArena->size & ARENA_SIZE_MASK;
239 ARENA_INUSE *pArena = (ARENA_INUSE *)ptr;
240 DPRINTF( "%08lx used %08lx\n",
241 (DWORD)pArena, pArena->size & ARENA_SIZE_MASK );
242 ptr += sizeof(*pArena) + (pArena->size & ARENA_SIZE_MASK);
243 arenaSize += sizeof(ARENA_INUSE);
244 usedSize += pArena->size & ARENA_SIZE_MASK;
247 DPRINTF( "\nTotal: Size=%08lx Committed=%08lx Free=%08lx Used=%08lx Arenas=%08lx (%ld%%)\n\n",
248 subheap->size, subheap->commitSize, freeSize, usedSize,
249 arenaSize, (arenaSize * 100) / subheap->size );
250 subheap = subheap->next;
255 /***********************************************************************
258 * Pointer to the heap
261 static HEAP *HEAP_GetPtr(
262 HANDLE heap /* [in] Handle to the heap */
264 HEAP *heapPtr = (HEAP *)heap;
265 if (!heapPtr || (heapPtr->magic != HEAP_MAGIC))
267 ERR("Invalid heap %p!\n", heap );
270 if (TRACE_ON(heap) && !HEAP_IsRealArena( heapPtr, 0, NULL, NOISY ))
272 HEAP_Dump( heapPtr );
280 /***********************************************************************
281 * HEAP_InsertFreeBlock
283 * Insert a free block into the free list.
285 static inline void HEAP_InsertFreeBlock( HEAP *heap, ARENA_FREE *pArena, BOOL last )
287 FREE_LIST_ENTRY *pEntry = heap->freeList;
288 while (pEntry->size < pArena->size) pEntry++;
291 /* insert at end of free list, i.e. before the next free list entry */
293 if (pEntry == &heap->freeList[HEAP_NB_FREE_LISTS]) pEntry = heap->freeList;
294 pArena->prev = pEntry->arena.prev;
295 pArena->prev->next = pArena;
296 pArena->next = &pEntry->arena;
297 pEntry->arena.prev = pArena;
301 /* insert at head of free list */
302 pArena->next = pEntry->arena.next;
303 pArena->next->prev = pArena;
304 pArena->prev = &pEntry->arena;
305 pEntry->arena.next = pArena;
307 pArena->size |= ARENA_FLAG_FREE;
311 /***********************************************************************
313 * Find the sub-heap containing a given address.
319 static SUBHEAP *HEAP_FindSubHeap(
320 const HEAP *heap, /* [in] Heap pointer */
321 LPCVOID ptr /* [in] Address */
323 const SUBHEAP *sub = &heap->subheap;
326 if (((const char *)ptr >= (const char *)sub) &&
327 ((const char *)ptr < (const char *)sub + sub->size)) return (SUBHEAP*)sub;
334 /***********************************************************************
337 * Make sure the heap storage is committed up to (not including) ptr.
339 static inline BOOL HEAP_Commit( SUBHEAP *subheap, void *ptr )
341 DWORD size = (DWORD)((char *)ptr - (char *)subheap);
342 size = (size + COMMIT_MASK) & ~COMMIT_MASK;
343 if (size > subheap->size) size = subheap->size;
344 if (size <= subheap->commitSize) return TRUE;
345 size -= subheap->commitSize;
346 if (NtAllocateVirtualMemory( GetCurrentProcess(), &ptr, (char *)subheap + subheap->commitSize,
347 &size, MEM_COMMIT, PAGE_EXECUTE_READWRITE))
349 WARN("Could not commit %08lx bytes at %08lx for heap %08lx\n",
350 size, (DWORD)((char *)subheap + subheap->commitSize),
351 (DWORD)subheap->heap );
354 subheap->commitSize += size;
359 /***********************************************************************
362 * If possible, decommit the heap storage from (including) 'ptr'.
364 static inline BOOL HEAP_Decommit( SUBHEAP *subheap, void *ptr )
369 DWORD size = (DWORD)((char *)ptr - (char *)subheap);
370 /* round to next block and add one full block */
371 size = ((size + COMMIT_MASK) & ~COMMIT_MASK) + COMMIT_MASK + 1;
372 if (size >= subheap->commitSize) return TRUE;
373 decommit_size = subheap->commitSize - size;
374 addr = (char *)subheap + size;
376 if (NtFreeVirtualMemory( GetCurrentProcess(), &addr, &decommit_size, MEM_DECOMMIT ))
378 WARN("Could not decommit %08lx bytes at %08lx for heap %p\n",
379 decommit_size, (DWORD)((char *)subheap + size), subheap->heap );
382 subheap->commitSize -= decommit_size;
387 /***********************************************************************
388 * HEAP_CreateFreeBlock
390 * Create a free block at a specified address. 'size' is the size of the
391 * whole block, including the new arena.
393 static void HEAP_CreateFreeBlock( SUBHEAP *subheap, void *ptr, DWORD size )
399 /* Create a free arena */
400 mark_block_uninitialized( ptr, sizeof( ARENA_FREE ) );
401 pFree = (ARENA_FREE *)ptr;
402 pFree->magic = ARENA_FREE_MAGIC;
404 /* If debugging, erase the freed block content */
406 pEnd = (char *)ptr + size;
407 if (pEnd > (char *)subheap + subheap->commitSize) pEnd = (char *)subheap + subheap->commitSize;
408 if (pEnd > (char *)(pFree + 1)) mark_block_free( pFree + 1, pEnd - (char *)(pFree + 1) );
410 /* Check if next block is free also */
412 if (((char *)ptr + size < (char *)subheap + subheap->size) &&
413 (*(DWORD *)((char *)ptr + size) & ARENA_FLAG_FREE))
415 /* Remove the next arena from the free list */
416 ARENA_FREE *pNext = (ARENA_FREE *)((char *)ptr + size);
417 pNext->next->prev = pNext->prev;
418 pNext->prev->next = pNext->next;
419 size += (pNext->size & ARENA_SIZE_MASK) + sizeof(*pNext);
420 mark_block_free( pNext, sizeof(ARENA_FREE) );
423 /* Set the next block PREV_FREE flag and pointer */
425 last = ((char *)ptr + size >= (char *)subheap + subheap->size);
428 DWORD *pNext = (DWORD *)((char *)ptr + size);
429 *pNext |= ARENA_FLAG_PREV_FREE;
430 mark_block_initialized( pNext - 1, sizeof( ARENA_FREE * ) );
431 *(ARENA_FREE **)(pNext - 1) = pFree;
434 /* Last, insert the new block into the free list */
436 pFree->size = size - sizeof(*pFree);
437 HEAP_InsertFreeBlock( subheap->heap, pFree, last );
441 /***********************************************************************
442 * HEAP_MakeInUseBlockFree
444 * Turn an in-use block into a free block. Can also decommit the end of
445 * the heap, and possibly even free the sub-heap altogether.
447 static void HEAP_MakeInUseBlockFree( SUBHEAP *subheap, ARENA_INUSE *pArena )
450 DWORD size = (pArena->size & ARENA_SIZE_MASK) + sizeof(*pArena);
452 /* Check if we can merge with previous block */
454 if (pArena->size & ARENA_FLAG_PREV_FREE)
456 pFree = *((ARENA_FREE **)pArena - 1);
457 size += (pFree->size & ARENA_SIZE_MASK) + sizeof(ARENA_FREE);
458 /* Remove it from the free list */
459 pFree->next->prev = pFree->prev;
460 pFree->prev->next = pFree->next;
462 else pFree = (ARENA_FREE *)pArena;
464 /* Create a free block */
466 HEAP_CreateFreeBlock( subheap, pFree, size );
467 size = (pFree->size & ARENA_SIZE_MASK) + sizeof(ARENA_FREE);
468 if ((char *)pFree + size < (char *)subheap + subheap->size)
469 return; /* Not the last block, so nothing more to do */
471 /* Free the whole sub-heap if it's empty and not the original one */
473 if (((char *)pFree == (char *)subheap + subheap->headerSize) &&
474 (subheap != &subheap->heap->subheap))
477 SUBHEAP *pPrev = &subheap->heap->subheap;
478 /* Remove the free block from the list */
479 pFree->next->prev = pFree->prev;
480 pFree->prev->next = pFree->next;
481 /* Remove the subheap from the list */
482 while (pPrev && (pPrev->next != subheap)) pPrev = pPrev->next;
483 if (pPrev) pPrev->next = subheap->next;
484 /* Free the memory */
486 NtFreeVirtualMemory( GetCurrentProcess(), (void **)&subheap, &size, MEM_RELEASE );
490 /* Decommit the end of the heap */
492 if (!(subheap->heap->flags & HEAP_SHARED)) HEAP_Decommit( subheap, pFree + 1 );
496 /***********************************************************************
499 * Shrink an in-use block.
501 static void HEAP_ShrinkBlock(SUBHEAP *subheap, ARENA_INUSE *pArena, DWORD size)
503 if ((pArena->size & ARENA_SIZE_MASK) >= size + HEAP_MIN_BLOCK_SIZE)
505 HEAP_CreateFreeBlock( subheap, (char *)(pArena + 1) + size,
506 (pArena->size & ARENA_SIZE_MASK) - size );
507 /* assign size plus previous arena flags */
508 pArena->size = size | (pArena->size & ~ARENA_SIZE_MASK);
512 /* Turn off PREV_FREE flag in next block */
513 char *pNext = (char *)(pArena + 1) + (pArena->size & ARENA_SIZE_MASK);
514 if (pNext < (char *)subheap + subheap->size)
515 *(DWORD *)pNext &= ~ARENA_FLAG_PREV_FREE;
519 /***********************************************************************
522 static BOOL HEAP_InitSubHeap( HEAP *heap, LPVOID address, DWORD flags,
523 DWORD commitSize, DWORD totalSize )
526 FREE_LIST_ENTRY *pEntry;
531 if (flags & HEAP_SHARED)
532 commitSize = totalSize; /* always commit everything in a shared heap */
533 if (NtAllocateVirtualMemory( GetCurrentProcess(), &address, address,
534 &commitSize, MEM_COMMIT, PAGE_EXECUTE_READWRITE))
536 WARN("Could not commit %08lx bytes for sub-heap %p\n", commitSize, address );
540 /* Fill the sub-heap structure */
542 subheap = (SUBHEAP *)address;
543 subheap->heap = heap;
544 subheap->size = totalSize;
545 subheap->commitSize = commitSize;
546 subheap->magic = SUBHEAP_MAGIC;
548 if ( subheap != (SUBHEAP *)heap )
550 /* If this is a secondary subheap, insert it into list */
552 subheap->headerSize = ROUND_SIZE( sizeof(SUBHEAP) );
553 subheap->next = heap->subheap.next;
554 heap->subheap.next = subheap;
558 /* If this is a primary subheap, initialize main heap */
560 subheap->headerSize = ROUND_SIZE( sizeof(HEAP) );
561 subheap->next = NULL;
564 heap->magic = HEAP_MAGIC;
566 /* Build the free lists */
568 for (i = 0, pEntry = heap->freeList; i < HEAP_NB_FREE_LISTS; i++, pEntry++)
570 pEntry->size = HEAP_freeListSizes[i];
571 pEntry->arena.size = 0 | ARENA_FLAG_FREE;
572 pEntry->arena.next = i < HEAP_NB_FREE_LISTS-1 ?
573 &heap->freeList[i+1].arena : &heap->freeList[0].arena;
574 pEntry->arena.prev = i ? &heap->freeList[i-1].arena :
575 &heap->freeList[HEAP_NB_FREE_LISTS-1].arena;
576 pEntry->arena.magic = ARENA_FREE_MAGIC;
579 /* Initialize critical section */
581 RtlInitializeCriticalSection( &heap->critSection );
582 if (flags & HEAP_SHARED)
584 /* let's assume that only one thread at a time will try to do this */
585 HANDLE sem = heap->critSection.LockSemaphore;
586 if (!sem) NtCreateSemaphore( &sem, SEMAPHORE_ALL_ACCESS, NULL, 0, 1 );
588 NtDuplicateObject( GetCurrentProcess(), sem, GetCurrentProcess(), &sem, 0, 0,
589 DUP_HANDLE_MAKE_GLOBAL | DUP_HANDLE_SAME_ACCESS | DUP_HANDLE_CLOSE_SOURCE );
590 heap->critSection.LockSemaphore = sem;
594 /* Create the first free block */
596 HEAP_CreateFreeBlock( subheap, (LPBYTE)subheap + subheap->headerSize,
597 subheap->size - subheap->headerSize );
602 /***********************************************************************
605 * Create a sub-heap of the given size.
606 * If heap == NULL, creates a main heap.
608 static SUBHEAP *HEAP_CreateSubHeap( HEAP *heap, void *base, DWORD flags,
609 DWORD commitSize, DWORD totalSize )
611 LPVOID address = base;
613 /* round-up sizes on a 64K boundary */
614 totalSize = (totalSize + 0xffff) & 0xffff0000;
615 commitSize = (commitSize + 0xffff) & 0xffff0000;
616 if (!commitSize) commitSize = 0x10000;
617 if (totalSize < commitSize) totalSize = commitSize;
621 /* allocate the memory block */
622 if (NtAllocateVirtualMemory( GetCurrentProcess(), &address, NULL, &totalSize,
623 MEM_RESERVE, PAGE_EXECUTE_READWRITE ))
625 WARN("Could not allocate %08lx bytes\n", totalSize );
630 /* Initialize subheap */
632 if (!HEAP_InitSubHeap( heap ? heap : (HEAP *)address,
633 address, flags, commitSize, totalSize ))
636 if (!base) NtFreeVirtualMemory( GetCurrentProcess(), &address, &size, MEM_RELEASE );
640 return (SUBHEAP *)address;
644 /***********************************************************************
647 * Find a free block at least as large as the requested size, and make sure
648 * the requested size is committed.
650 static ARENA_FREE *HEAP_FindFreeBlock( HEAP *heap, DWORD size,
651 SUBHEAP **ppSubHeap )
655 FREE_LIST_ENTRY *pEntry = heap->freeList;
657 /* Find a suitable free list, and in it find a block large enough */
659 while (pEntry->size < size) pEntry++;
660 pArena = pEntry->arena.next;
661 while (pArena != &heap->freeList[0].arena)
663 DWORD arena_size = (pArena->size & ARENA_SIZE_MASK) +
664 sizeof(ARENA_FREE) - sizeof(ARENA_INUSE);
665 if (arena_size >= size)
667 subheap = HEAP_FindSubHeap( heap, pArena );
668 if (!HEAP_Commit( subheap, (char *)pArena + sizeof(ARENA_INUSE)
669 + size + HEAP_MIN_BLOCK_SIZE))
671 *ppSubHeap = subheap;
674 pArena = pArena->next;
677 /* If no block was found, attempt to grow the heap */
679 if (!(heap->flags & HEAP_GROWABLE))
681 WARN("Not enough space in heap %08lx for %08lx bytes\n",
685 /* make sure that we have a big enough size *committed* to fit another
686 * last free arena in !
687 * So just one heap struct, one first free arena which will eventually
688 * get inuse, and HEAP_MIN_BLOCK_SIZE for the second free arena that
689 * might get assigned all remaining free space in HEAP_ShrinkBlock() */
690 size += ROUND_SIZE(sizeof(SUBHEAP)) + sizeof(ARENA_INUSE) + HEAP_MIN_BLOCK_SIZE;
691 if (!(subheap = HEAP_CreateSubHeap( heap, NULL, heap->flags, size,
692 max( HEAP_DEF_SIZE, size ) )))
695 TRACE("created new sub-heap %08lx of %08lx bytes for heap %08lx\n",
696 (DWORD)subheap, size, (DWORD)heap );
698 *ppSubHeap = subheap;
699 return (ARENA_FREE *)(subheap + 1);
703 /***********************************************************************
704 * HEAP_IsValidArenaPtr
706 * Check that the pointer is inside the range possible for arenas.
708 static BOOL HEAP_IsValidArenaPtr( const HEAP *heap, const void *ptr )
711 const SUBHEAP *subheap = HEAP_FindSubHeap( heap, ptr );
712 if (!subheap) return FALSE;
713 if ((const char *)ptr >= (const char *)subheap + subheap->headerSize) return TRUE;
714 if (subheap != &heap->subheap) return FALSE;
715 for (i = 0; i < HEAP_NB_FREE_LISTS; i++)
716 if (ptr == (const void *)&heap->freeList[i].arena) return TRUE;
721 /***********************************************************************
722 * HEAP_ValidateFreeArena
724 static BOOL HEAP_ValidateFreeArena( SUBHEAP *subheap, ARENA_FREE *pArena )
726 char *heapEnd = (char *)subheap + subheap->size;
728 /* Check for unaligned pointers */
729 if ( (long)pArena % ALIGNMENT != 0 )
731 ERR( "Heap %08lx: unaligned arena pointer %08lx\n",
732 (DWORD)subheap->heap, (DWORD)pArena );
736 /* Check magic number */
737 if (pArena->magic != ARENA_FREE_MAGIC)
739 ERR("Heap %08lx: invalid free arena magic for %08lx\n",
740 (DWORD)subheap->heap, (DWORD)pArena );
743 /* Check size flags */
744 if (!(pArena->size & ARENA_FLAG_FREE) ||
745 (pArena->size & ARENA_FLAG_PREV_FREE))
747 ERR("Heap %08lx: bad flags %lx for free arena %08lx\n",
748 (DWORD)subheap->heap, pArena->size & ~ARENA_SIZE_MASK, (DWORD)pArena );
750 /* Check arena size */
751 if ((char *)(pArena + 1) + (pArena->size & ARENA_SIZE_MASK) > heapEnd)
753 ERR("Heap %08lx: bad size %08lx for free arena %08lx\n",
754 (DWORD)subheap->heap, (DWORD)pArena->size & ARENA_SIZE_MASK, (DWORD)pArena );
757 /* Check that next pointer is valid */
758 if (!HEAP_IsValidArenaPtr( subheap->heap, pArena->next ))
760 ERR("Heap %08lx: bad next ptr %08lx for arena %08lx\n",
761 (DWORD)subheap->heap, (DWORD)pArena->next, (DWORD)pArena );
764 /* Check that next arena is free */
765 if (!(pArena->next->size & ARENA_FLAG_FREE) ||
766 (pArena->next->magic != ARENA_FREE_MAGIC))
768 ERR("Heap %08lx: next arena %08lx invalid for %08lx\n",
769 (DWORD)subheap->heap, (DWORD)pArena->next, (DWORD)pArena );
772 /* Check that prev pointer is valid */
773 if (!HEAP_IsValidArenaPtr( subheap->heap, pArena->prev ))
775 ERR("Heap %08lx: bad prev ptr %08lx for arena %08lx\n",
776 (DWORD)subheap->heap, (DWORD)pArena->prev, (DWORD)pArena );
779 /* Check that prev arena is free */
780 if (!(pArena->prev->size & ARENA_FLAG_FREE) ||
781 (pArena->prev->magic != ARENA_FREE_MAGIC))
783 /* this often means that the prev arena got overwritten
784 * by a memory write before that prev arena */
785 ERR("Heap %08lx: prev arena %08lx invalid for %08lx\n",
786 (DWORD)subheap->heap, (DWORD)pArena->prev, (DWORD)pArena );
789 /* Check that next block has PREV_FREE flag */
790 if ((char *)(pArena + 1) + (pArena->size & ARENA_SIZE_MASK) < heapEnd)
792 if (!(*(DWORD *)((char *)(pArena + 1) +
793 (pArena->size & ARENA_SIZE_MASK)) & ARENA_FLAG_PREV_FREE))
795 ERR("Heap %08lx: free arena %08lx next block has no PREV_FREE flag\n",
796 (DWORD)subheap->heap, (DWORD)pArena );
799 /* Check next block back pointer */
800 if (*((ARENA_FREE **)((char *)(pArena + 1) +
801 (pArena->size & ARENA_SIZE_MASK)) - 1) != pArena)
803 ERR("Heap %08lx: arena %08lx has wrong back ptr %08lx\n",
804 (DWORD)subheap->heap, (DWORD)pArena,
805 *((DWORD *)((char *)(pArena+1)+ (pArena->size & ARENA_SIZE_MASK)) - 1));
813 /***********************************************************************
814 * HEAP_ValidateInUseArena
816 static BOOL HEAP_ValidateInUseArena( const SUBHEAP *subheap, const ARENA_INUSE *pArena, BOOL quiet )
818 const char *heapEnd = (const char *)subheap + subheap->size;
820 /* Check for unaligned pointers */
821 if ( (long)pArena % ALIGNMENT != 0 )
823 if ( quiet == NOISY )
825 ERR( "Heap %08lx: unaligned arena pointer %08lx\n",
826 (DWORD)subheap->heap, (DWORD)pArena );
827 if ( TRACE_ON(heap) )
828 HEAP_Dump( subheap->heap );
830 else if ( WARN_ON(heap) )
832 WARN( "Heap %08lx: unaligned arena pointer %08lx\n",
833 (DWORD)subheap->heap, (DWORD)pArena );
834 if ( TRACE_ON(heap) )
835 HEAP_Dump( subheap->heap );
840 /* Check magic number */
841 if (pArena->magic != ARENA_INUSE_MAGIC)
843 if (quiet == NOISY) {
844 ERR("Heap %08lx: invalid in-use arena magic for %08lx\n",
845 (DWORD)subheap->heap, (DWORD)pArena );
847 HEAP_Dump( subheap->heap );
848 } else if (WARN_ON(heap)) {
849 WARN("Heap %08lx: invalid in-use arena magic for %08lx\n",
850 (DWORD)subheap->heap, (DWORD)pArena );
852 HEAP_Dump( subheap->heap );
856 /* Check size flags */
857 if (pArena->size & ARENA_FLAG_FREE)
859 ERR("Heap %08lx: bad flags %lx for in-use arena %08lx\n",
860 (DWORD)subheap->heap, pArena->size & ~ARENA_SIZE_MASK, (DWORD)pArena );
863 /* Check arena size */
864 if ((const char *)(pArena + 1) + (pArena->size & ARENA_SIZE_MASK) > heapEnd)
866 ERR("Heap %08lx: bad size %08lx for in-use arena %08lx\n",
867 (DWORD)subheap->heap, (DWORD)pArena->size & ARENA_SIZE_MASK, (DWORD)pArena );
870 /* Check next arena PREV_FREE flag */
871 if (((const char *)(pArena + 1) + (pArena->size & ARENA_SIZE_MASK) < heapEnd) &&
872 (*(const DWORD *)((const char *)(pArena + 1) + (pArena->size & ARENA_SIZE_MASK)) & ARENA_FLAG_PREV_FREE))
874 ERR("Heap %08lx: in-use arena %08lx next block has PREV_FREE flag\n",
875 (DWORD)subheap->heap, (DWORD)pArena );
878 /* Check prev free arena */
879 if (pArena->size & ARENA_FLAG_PREV_FREE)
881 const ARENA_FREE *pPrev = *((const ARENA_FREE * const*)pArena - 1);
882 /* Check prev pointer */
883 if (!HEAP_IsValidArenaPtr( subheap->heap, pPrev ))
885 ERR("Heap %08lx: bad back ptr %08lx for arena %08lx\n",
886 (DWORD)subheap->heap, (DWORD)pPrev, (DWORD)pArena );
889 /* Check that prev arena is free */
890 if (!(pPrev->size & ARENA_FLAG_FREE) ||
891 (pPrev->magic != ARENA_FREE_MAGIC))
893 ERR("Heap %08lx: prev arena %08lx invalid for in-use %08lx\n",
894 (DWORD)subheap->heap, (DWORD)pPrev, (DWORD)pArena );
897 /* Check that prev arena is really the previous block */
898 if ((const char *)(pPrev + 1) + (pPrev->size & ARENA_SIZE_MASK) != (const char *)pArena)
900 ERR("Heap %08lx: prev arena %08lx is not prev for in-use %08lx\n",
901 (DWORD)subheap->heap, (DWORD)pPrev, (DWORD)pArena );
909 /***********************************************************************
910 * HEAP_IsRealArena [Internal]
911 * Validates a block is a valid arena.
917 static BOOL HEAP_IsRealArena( HEAP *heapPtr, /* [in] ptr to the heap */
918 DWORD flags, /* [in] Bit flags that control access during operation */
919 LPCVOID block, /* [in] Optional pointer to memory block to validate */
920 BOOL quiet ) /* [in] Flag - if true, HEAP_ValidateInUseArena
921 * does not complain */
926 if (!heapPtr || (heapPtr->magic != HEAP_MAGIC))
928 ERR("Invalid heap %p!\n", heapPtr );
932 flags &= HEAP_NO_SERIALIZE;
933 flags |= heapPtr->flags;
934 /* calling HeapLock may result in infinite recursion, so do the critsect directly */
935 if (!(flags & HEAP_NO_SERIALIZE))
936 RtlEnterCriticalSection( &heapPtr->critSection );
940 /* Only check this single memory block */
942 if (!(subheap = HEAP_FindSubHeap( heapPtr, block )) ||
943 ((const char *)block < (char *)subheap + subheap->headerSize
944 + sizeof(ARENA_INUSE)))
947 ERR("Heap %p: block %p is not inside heap\n", heapPtr, block );
948 else if (WARN_ON(heap))
949 WARN("Heap %p: block %p is not inside heap\n", heapPtr, block );
952 ret = HEAP_ValidateInUseArena( subheap, (const ARENA_INUSE *)block - 1, quiet );
954 if (!(flags & HEAP_NO_SERIALIZE))
955 RtlLeaveCriticalSection( &heapPtr->critSection );
959 subheap = &heapPtr->subheap;
960 while (subheap && ret)
962 char *ptr = (char *)subheap + subheap->headerSize;
963 while (ptr < (char *)subheap + subheap->size)
965 if (*(DWORD *)ptr & ARENA_FLAG_FREE)
967 if (!HEAP_ValidateFreeArena( subheap, (ARENA_FREE *)ptr )) {
971 ptr += sizeof(ARENA_FREE) + (*(DWORD *)ptr & ARENA_SIZE_MASK);
975 if (!HEAP_ValidateInUseArena( subheap, (ARENA_INUSE *)ptr, NOISY )) {
979 ptr += sizeof(ARENA_INUSE) + (*(DWORD *)ptr & ARENA_SIZE_MASK);
982 subheap = subheap->next;
985 if (!(flags & HEAP_NO_SERIALIZE)) RtlLeaveCriticalSection( &heapPtr->critSection );
990 /***********************************************************************
991 * RtlCreateHeap (NTDLL.@)
996 * flags [I] HEAP_ flags from "winnt.h"
997 * addr [I] Desired base address
998 * totalSize [I] Total size of the heap, or 0 for a growable heap
999 * commitSize [I] Amount of heap space to commit
1000 * unknown [I] Not yet understood
1001 * definition [I] Heap definition
1004 * Success: A HANDLE to the newly created heap.
1005 * Failure: a NULL HANDLE.
1007 HANDLE WINAPI RtlCreateHeap( ULONG flags, PVOID addr, ULONG totalSize, ULONG commitSize,
1008 PVOID unknown, PRTL_HEAP_DEFINITION definition )
1012 /* Allocate the heap block */
1016 totalSize = HEAP_DEF_SIZE;
1017 flags |= HEAP_GROWABLE;
1020 if (!(subheap = HEAP_CreateSubHeap( NULL, addr, flags, commitSize, totalSize ))) return 0;
1022 /* link it into the per-process heap list */
1025 HEAP *heapPtr = subheap->heap;
1026 RtlLockHeap( processHeap );
1027 heapPtr->next = firstHeap;
1028 firstHeap = heapPtr;
1029 RtlUnlockHeap( processHeap );
1031 else processHeap = subheap->heap; /* assume the first heap we create is the process main heap */
1033 return (HANDLE)subheap;
1037 /***********************************************************************
1038 * RtlDestroyHeap (NTDLL.@)
1040 * Destroy a Heap created with RtlCreateHeap().
1043 * heap [I] Heap to destroy.
1046 * Success: A NULL HANDLE, if heap is NULL or it was destroyed
1047 * Failure: The Heap handle, if heap is the process heap.
1049 HANDLE WINAPI RtlDestroyHeap( HANDLE heap )
1051 HEAP *heapPtr = HEAP_GetPtr( heap );
1054 TRACE("%p\n", heap );
1055 if (!heapPtr) return heap;
1057 if (heap == processHeap) return heap; /* cannot delete the main process heap */
1058 else /* remove it from the per-process list */
1061 RtlLockHeap( processHeap );
1063 while (*pptr && *pptr != heapPtr) pptr = &(*pptr)->next;
1064 if (*pptr) *pptr = (*pptr)->next;
1065 RtlUnlockHeap( processHeap );
1068 RtlDeleteCriticalSection( &heapPtr->critSection );
1069 subheap = &heapPtr->subheap;
1072 SUBHEAP *next = subheap->next;
1074 void *addr = subheap;
1075 NtFreeVirtualMemory( GetCurrentProcess(), &addr, &size, MEM_RELEASE );
1082 /***********************************************************************
1083 * RtlAllocateHeap (NTDLL.@)
1085 * Allocate a memory block from a Heap.
1088 * heap [I] Heap to allocate block from
1089 * flags [I] HEAP_ flags from "winnt.h"
1090 * size [I] Size of the memory block to allocate
1093 * Success: A pointer to the newly allocated block
1097 * This call does not SetLastError().
1099 PVOID WINAPI RtlAllocateHeap( HANDLE heap, ULONG flags, ULONG size )
1102 ARENA_INUSE *pInUse;
1104 HEAP *heapPtr = HEAP_GetPtr( heap );
1106 /* Validate the parameters */
1108 if (!heapPtr) return NULL;
1109 flags &= HEAP_GENERATE_EXCEPTIONS | HEAP_NO_SERIALIZE | HEAP_ZERO_MEMORY;
1110 flags |= heapPtr->flags;
1111 size = ROUND_SIZE(size);
1112 if (size < HEAP_MIN_BLOCK_SIZE) size = HEAP_MIN_BLOCK_SIZE;
1114 if (!(flags & HEAP_NO_SERIALIZE)) RtlEnterCriticalSection( &heapPtr->critSection );
1115 /* Locate a suitable free block */
1117 if (!(pArena = HEAP_FindFreeBlock( heapPtr, size, &subheap )))
1119 TRACE("(%p,%08lx,%08lx): returning NULL\n",
1120 heap, flags, size );
1121 if (!(flags & HEAP_NO_SERIALIZE)) RtlLeaveCriticalSection( &heapPtr->critSection );
1122 if (flags & HEAP_GENERATE_EXCEPTIONS) RtlRaiseStatus( STATUS_NO_MEMORY );
1126 /* Remove the arena from the free list */
1128 pArena->next->prev = pArena->prev;
1129 pArena->prev->next = pArena->next;
1131 /* Build the in-use arena */
1133 pInUse = (ARENA_INUSE *)pArena;
1135 /* in-use arena is smaller than free arena,
1136 * so we have to add the difference to the size */
1137 pInUse->size = (pInUse->size & ~ARENA_FLAG_FREE) + sizeof(ARENA_FREE) - sizeof(ARENA_INUSE);
1138 pInUse->magic = ARENA_INUSE_MAGIC;
1140 /* Shrink the block */
1142 HEAP_ShrinkBlock( subheap, pInUse, size );
1144 if (flags & HEAP_ZERO_MEMORY)
1145 clear_block( pInUse + 1, pInUse->size & ARENA_SIZE_MASK );
1147 mark_block_uninitialized( pInUse + 1, pInUse->size & ARENA_SIZE_MASK );
1149 if (!(flags & HEAP_NO_SERIALIZE)) RtlLeaveCriticalSection( &heapPtr->critSection );
1151 TRACE("(%p,%08lx,%08lx): returning %08lx\n",
1152 heap, flags, size, (DWORD)(pInUse + 1) );
1153 return (LPVOID)(pInUse + 1);
1157 /***********************************************************************
1158 * RtlFreeHeap (NTDLL.@)
1160 * Free a memory block allocated with RtlAllocateHeap().
1163 * heap [I] Heap that block was allocated from
1164 * flags [I] HEAP_ flags from "winnt.h"
1165 * ptr [I] Block to free
1168 * Success: TRUE, if ptr is NULL or was freed successfully.
1171 BOOLEAN WINAPI RtlFreeHeap( HANDLE heap, ULONG flags, PVOID ptr )
1173 ARENA_INUSE *pInUse;
1175 HEAP *heapPtr = HEAP_GetPtr( heap );
1177 /* Validate the parameters */
1179 if (!ptr) return TRUE; /* freeing a NULL ptr isn't an error in Win2k */
1182 set_status( STATUS_INVALID_HANDLE );
1186 flags &= HEAP_NO_SERIALIZE;
1187 flags |= heapPtr->flags;
1188 if (!(flags & HEAP_NO_SERIALIZE)) RtlEnterCriticalSection( &heapPtr->critSection );
1189 if (!HEAP_IsRealArena( heapPtr, HEAP_NO_SERIALIZE, ptr, QUIET ))
1191 if (!(flags & HEAP_NO_SERIALIZE)) RtlLeaveCriticalSection( &heapPtr->critSection );
1192 set_status( STATUS_INVALID_PARAMETER );
1193 TRACE("(%p,%08lx,%08lx): returning FALSE\n",
1194 heap, flags, (DWORD)ptr );
1198 /* Turn the block into a free block */
1200 pInUse = (ARENA_INUSE *)ptr - 1;
1201 subheap = HEAP_FindSubHeap( heapPtr, pInUse );
1202 HEAP_MakeInUseBlockFree( subheap, pInUse );
1204 if (!(flags & HEAP_NO_SERIALIZE)) RtlLeaveCriticalSection( &heapPtr->critSection );
1206 TRACE("(%p,%08lx,%08lx): returning TRUE\n",
1207 heap, flags, (DWORD)ptr );
1212 /***********************************************************************
1213 * RtlReAllocateHeap (NTDLL.@)
1215 * Change the size of a memory block allocated with RtlAllocateHeap().
1218 * heap [I] Heap that block was allocated from
1219 * flags [I] HEAP_ flags from "winnt.h"
1220 * ptr [I] Block to resize
1221 * size [I] Size of the memory block to allocate
1224 * Success: A pointer to the resized block (which may be different).
1227 PVOID WINAPI RtlReAllocateHeap( HANDLE heap, ULONG flags, PVOID ptr, ULONG size )
1229 ARENA_INUSE *pArena;
1234 if (!ptr) return NULL;
1235 if (!(heapPtr = HEAP_GetPtr( heap )))
1237 set_status( STATUS_INVALID_HANDLE );
1241 /* Validate the parameters */
1243 flags &= HEAP_GENERATE_EXCEPTIONS | HEAP_NO_SERIALIZE | HEAP_ZERO_MEMORY |
1244 HEAP_REALLOC_IN_PLACE_ONLY;
1245 flags |= heapPtr->flags;
1246 size = ROUND_SIZE(size);
1247 if (size < HEAP_MIN_BLOCK_SIZE) size = HEAP_MIN_BLOCK_SIZE;
1249 if (!(flags & HEAP_NO_SERIALIZE)) RtlEnterCriticalSection( &heapPtr->critSection );
1250 if (!HEAP_IsRealArena( heapPtr, HEAP_NO_SERIALIZE, ptr, QUIET ))
1252 if (!(flags & HEAP_NO_SERIALIZE)) RtlLeaveCriticalSection( &heapPtr->critSection );
1253 set_status( STATUS_INVALID_PARAMETER );
1254 TRACE("(%p,%08lx,%08lx,%08lx): returning NULL\n",
1255 heap, flags, (DWORD)ptr, size );
1259 /* Check if we need to grow the block */
1261 pArena = (ARENA_INUSE *)ptr - 1;
1262 subheap = HEAP_FindSubHeap( heapPtr, pArena );
1263 oldSize = (pArena->size & ARENA_SIZE_MASK);
1266 char *pNext = (char *)(pArena + 1) + oldSize;
1267 if ((pNext < (char *)subheap + subheap->size) &&
1268 (*(DWORD *)pNext & ARENA_FLAG_FREE) &&
1269 (oldSize + (*(DWORD *)pNext & ARENA_SIZE_MASK) + sizeof(ARENA_FREE) >= size))
1271 /* The next block is free and large enough */
1272 ARENA_FREE *pFree = (ARENA_FREE *)pNext;
1273 pFree->next->prev = pFree->prev;
1274 pFree->prev->next = pFree->next;
1275 pArena->size += (pFree->size & ARENA_SIZE_MASK) + sizeof(*pFree);
1276 if (!HEAP_Commit( subheap, (char *)pArena + sizeof(ARENA_INUSE)
1277 + size + HEAP_MIN_BLOCK_SIZE))
1279 if (!(flags & HEAP_NO_SERIALIZE)) RtlLeaveCriticalSection( &heapPtr->critSection );
1280 if (flags & HEAP_GENERATE_EXCEPTIONS) RtlRaiseStatus( STATUS_NO_MEMORY );
1281 set_status( STATUS_NO_MEMORY );
1284 HEAP_ShrinkBlock( subheap, pArena, size );
1286 else /* Do it the hard way */
1289 ARENA_INUSE *pInUse;
1290 SUBHEAP *newsubheap;
1292 if ((flags & HEAP_REALLOC_IN_PLACE_ONLY) ||
1293 !(pNew = HEAP_FindFreeBlock( heapPtr, size, &newsubheap )))
1295 if (!(flags & HEAP_NO_SERIALIZE)) RtlLeaveCriticalSection( &heapPtr->critSection );
1296 if (flags & HEAP_GENERATE_EXCEPTIONS) RtlRaiseStatus( STATUS_NO_MEMORY );
1297 set_status( STATUS_NO_MEMORY );
1301 /* Build the in-use arena */
1303 pNew->next->prev = pNew->prev;
1304 pNew->prev->next = pNew->next;
1305 pInUse = (ARENA_INUSE *)pNew;
1306 pInUse->size = (pInUse->size & ~ARENA_FLAG_FREE)
1307 + sizeof(ARENA_FREE) - sizeof(ARENA_INUSE);
1308 pInUse->magic = ARENA_INUSE_MAGIC;
1309 HEAP_ShrinkBlock( newsubheap, pInUse, size );
1310 mark_block_initialized( pInUse + 1, oldSize );
1311 memcpy( pInUse + 1, pArena + 1, oldSize );
1313 /* Free the previous block */
1315 HEAP_MakeInUseBlockFree( subheap, pArena );
1316 subheap = newsubheap;
1320 else HEAP_ShrinkBlock( subheap, pArena, size ); /* Shrink the block */
1322 /* Clear the extra bytes if needed */
1326 if (flags & HEAP_ZERO_MEMORY)
1327 clear_block( (char *)(pArena + 1) + oldSize,
1328 (pArena->size & ARENA_SIZE_MASK) - oldSize );
1330 mark_block_uninitialized( (char *)(pArena + 1) + oldSize,
1331 (pArena->size & ARENA_SIZE_MASK) - oldSize );
1334 /* Return the new arena */
1336 if (!(flags & HEAP_NO_SERIALIZE)) RtlLeaveCriticalSection( &heapPtr->critSection );
1338 TRACE("(%p,%08lx,%08lx,%08lx): returning %08lx\n",
1339 heap, flags, (DWORD)ptr, size, (DWORD)(pArena + 1) );
1340 return (LPVOID)(pArena + 1);
1344 /***********************************************************************
1345 * RtlCompactHeap (NTDLL.@)
1347 * Compact the free space in a Heap.
1350 * heap [I] Heap that block was allocated from
1351 * flags [I] HEAP_ flags from "winnt.h"
1354 * The number of bytes compacted.
1357 * This function is a harmless stub.
1359 ULONG WINAPI RtlCompactHeap( HANDLE heap, ULONG flags )
1366 /***********************************************************************
1367 * RtlLockHeap (NTDLL.@)
1372 * heap [I] Heap to lock
1375 * Success: TRUE. The Heap is locked.
1376 * Failure: FALSE, if heap is invalid.
1378 BOOLEAN WINAPI RtlLockHeap( HANDLE heap )
1380 HEAP *heapPtr = HEAP_GetPtr( heap );
1381 if (!heapPtr) return FALSE;
1382 RtlEnterCriticalSection( &heapPtr->critSection );
1387 /***********************************************************************
1388 * RtlUnlockHeap (NTDLL.@)
1393 * heap [I] Heap to unlock
1396 * Success: TRUE. The Heap is unlocked.
1397 * Failure: FALSE, if heap is invalid.
1399 BOOLEAN WINAPI RtlUnlockHeap( HANDLE heap )
1401 HEAP *heapPtr = HEAP_GetPtr( heap );
1402 if (!heapPtr) return FALSE;
1403 RtlLeaveCriticalSection( &heapPtr->critSection );
1408 /***********************************************************************
1409 * RtlSizeHeap (NTDLL.@)
1411 * Get the actual size of a memory block allocated from a Heap.
1414 * heap [I] Heap that block was allocated from
1415 * flags [I] HEAP_ flags from "winnt.h"
1416 * ptr [I] Block to get the size of
1419 * Success: The size of the block.
1420 * Failure: -1, heap or ptr are invalid.
1423 * The size may be bigger than what was passed to RtlAllocateHeap().
1425 ULONG WINAPI RtlSizeHeap( HANDLE heap, ULONG flags, PVOID ptr )
1428 HEAP *heapPtr = HEAP_GetPtr( heap );
1432 set_status( STATUS_INVALID_HANDLE );
1435 flags &= HEAP_NO_SERIALIZE;
1436 flags |= heapPtr->flags;
1437 if (!(flags & HEAP_NO_SERIALIZE)) RtlEnterCriticalSection( &heapPtr->critSection );
1438 if (!HEAP_IsRealArena( heapPtr, HEAP_NO_SERIALIZE, ptr, QUIET ))
1440 set_status( STATUS_INVALID_PARAMETER );
1445 ARENA_INUSE *pArena = (ARENA_INUSE *)ptr - 1;
1446 ret = pArena->size & ARENA_SIZE_MASK;
1448 if (!(flags & HEAP_NO_SERIALIZE)) RtlLeaveCriticalSection( &heapPtr->critSection );
1450 TRACE("(%p,%08lx,%08lx): returning %08lx\n",
1451 heap, flags, (DWORD)ptr, ret );
1456 /***********************************************************************
1457 * RtlValidateHeap (NTDLL.@)
1459 * Determine if a block is a valid alloction from a heap.
1462 * heap [I] Heap that block was allocated from
1463 * flags [I] HEAP_ flags from "winnt.h"
1464 * ptr [I] Block to check
1467 * Success: TRUE. The block was allocated from heap.
1468 * Failure: FALSE, if heap is invalid or ptr was not allocated from it.
1470 BOOLEAN WINAPI RtlValidateHeap( HANDLE heap, ULONG flags, LPCVOID ptr )
1472 HEAP *heapPtr = HEAP_GetPtr( heap );
1473 if (!heapPtr) return FALSE;
1474 return HEAP_IsRealArena( heapPtr, flags, ptr, QUIET );
1478 /***********************************************************************
1479 * RtlWalkHeap (NTDLL.@)
1482 * The PROCESS_HEAP_ENTRY flag values seem different between this
1483 * function and HeapWalk(). To be checked.
1485 NTSTATUS WINAPI RtlWalkHeap( HANDLE heap, PVOID entry_ptr )
1487 LPPROCESS_HEAP_ENTRY entry = entry_ptr; /* FIXME */
1488 HEAP *heapPtr = HEAP_GetPtr(heap);
1489 SUBHEAP *sub, *currentheap = NULL;
1492 int region_index = 0;
1494 FIXME( "not fully compatible\n" );
1496 if (!heapPtr || !entry) return STATUS_INVALID_PARAMETER;
1498 if (!(heapPtr->flags & HEAP_NO_SERIALIZE)) RtlEnterCriticalSection( &heapPtr->critSection );
1500 /* set ptr to the next arena to be examined */
1502 if (!entry->lpData) /* first call (init) ? */
1504 TRACE("begin walking of heap %p.\n", heap);
1505 currentheap = &heapPtr->subheap;
1506 ptr = (char*)currentheap + currentheap->headerSize;
1510 ptr = entry->lpData;
1511 sub = &heapPtr->subheap;
1514 if (((char *)ptr >= (char *)sub) &&
1515 ((char *)ptr < (char *)sub + sub->size))
1523 if (currentheap == NULL)
1525 ERR("no matching subheap found, shouldn't happen !\n");
1526 ret = STATUS_NO_MORE_ENTRIES;
1530 ptr += entry->cbData; /* point to next arena */
1531 if (ptr > (char *)currentheap + currentheap->size - 1)
1532 { /* proceed with next subheap */
1533 if (!(currentheap = currentheap->next))
1534 { /* successfully finished */
1535 TRACE("end reached.\n");
1536 ret = STATUS_NO_MORE_ENTRIES;
1539 ptr = (char*)currentheap + currentheap->headerSize;
1544 if (*(DWORD *)ptr & ARENA_FLAG_FREE)
1546 ARENA_FREE *pArena = (ARENA_FREE *)ptr;
1548 /*TRACE("free, magic: %04x\n", pArena->magic);*/
1550 entry->lpData = pArena + 1;
1551 entry->cbData = pArena->size & ARENA_SIZE_MASK;
1552 entry->cbOverhead = sizeof(ARENA_FREE);
1553 entry->wFlags = PROCESS_HEAP_UNCOMMITTED_RANGE;
1557 ARENA_INUSE *pArena = (ARENA_INUSE *)ptr;
1559 /*TRACE("busy, magic: %04x\n", pArena->magic);*/
1561 entry->lpData = pArena + 1;
1562 entry->cbData = pArena->size & ARENA_SIZE_MASK;
1563 entry->cbOverhead = sizeof(ARENA_INUSE);
1564 entry->wFlags = PROCESS_HEAP_ENTRY_BUSY;
1565 /* FIXME: can't handle PROCESS_HEAP_ENTRY_MOVEABLE
1566 and PROCESS_HEAP_ENTRY_DDESHARE yet */
1569 entry->iRegionIndex = region_index;
1571 /* first element of heap ? */
1572 if (ptr == (char *)(currentheap + currentheap->headerSize))
1574 entry->wFlags |= PROCESS_HEAP_REGION;
1575 entry->u.Region.dwCommittedSize = currentheap->commitSize;
1576 entry->u.Region.dwUnCommittedSize =
1577 currentheap->size - currentheap->commitSize;
1578 entry->u.Region.lpFirstBlock = /* first valid block */
1579 currentheap + currentheap->headerSize;
1580 entry->u.Region.lpLastBlock = /* first invalid block */
1581 currentheap + currentheap->size;
1583 ret = STATUS_SUCCESS;
1586 if (!(heapPtr->flags & HEAP_NO_SERIALIZE)) RtlLeaveCriticalSection( &heapPtr->critSection );
1591 /***********************************************************************
1592 * RtlGetProcessHeaps (NTDLL.@)
1594 * Get the Heaps belonging to the current process.
1597 * count [I] size of heaps
1598 * heaps [O] Destination array for heap HANDLE's
1601 * Success: The number of Heaps allocated by the process.
1604 ULONG WINAPI RtlGetProcessHeaps( ULONG count, HANDLE *heaps )
1609 if (!processHeap) return 0; /* should never happen */
1610 total = 1; /* main heap */
1611 RtlLockHeap( processHeap );
1612 for (ptr = firstHeap; ptr; ptr = ptr->next) total++;
1615 *heaps++ = (HANDLE)processHeap;
1616 for (ptr = firstHeap; ptr; ptr = ptr->next) *heaps++ = (HANDLE)ptr;
1618 RtlUnlockHeap( processHeap );