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
28 #ifdef HAVE_VALGRIND_MEMCHECK_H
29 #include <valgrind/memcheck.h>
32 #define NONAMELESSUNION
33 #define NONAMELESSSTRUCT
35 #include "wine/winbase16.h"
40 #include "wine/debug.h"
42 #include "wine/server_protocol.h"
44 WINE_DEFAULT_DEBUG_CHANNEL(heap);
46 /* Note: the heap data structures are based on what Pietrek describes in his
47 * book 'Windows 95 System Programming Secrets'. The layout is not exactly
48 * the same, but could be easily adapted if it turns out some programs
52 typedef struct tagARENA_INUSE
54 DWORD size; /* Block size; must be the first field */
55 DWORD magic; /* Magic number */
58 typedef struct tagARENA_FREE
60 DWORD size; /* Block size; must be the first field */
61 DWORD magic; /* Magic number */
62 struct tagARENA_FREE *next; /* Next free arena */
63 struct tagARENA_FREE *prev; /* Prev free arena */
66 #define ARENA_FLAG_FREE 0x00000001 /* flags OR'ed with arena size */
67 #define ARENA_FLAG_PREV_FREE 0x00000002
68 #define ARENA_SIZE_MASK (~3)
69 #define ARENA_INUSE_MAGIC 0x44455355 /* Value for arena 'magic' field */
70 #define ARENA_FREE_MAGIC 0x45455246 /* Value for arena 'magic' field */
72 #define ARENA_INUSE_FILLER 0x55
73 #define ARENA_FREE_FILLER 0xaa
75 #define ALIGNMENT 8 /* everything is aligned on 8 byte boundaries */
76 #define ROUND_SIZE(size) (((size) + ALIGNMENT - 1) & ~(ALIGNMENT-1))
78 #define QUIET 1 /* Suppress messages */
79 #define NOISY 0 /* Report all errors */
81 #define HEAP_NB_FREE_LISTS 4 /* Number of free lists */
83 /* Max size of the blocks on the free lists */
84 static const DWORD HEAP_freeListSizes[HEAP_NB_FREE_LISTS] =
86 0x20, 0x80, 0x200, ~0UL
97 typedef struct tagSUBHEAP
99 DWORD size; /* Size of the whole sub-heap */
100 DWORD commitSize; /* Committed size of the sub-heap */
101 DWORD headerSize; /* Size of the heap header */
102 struct tagSUBHEAP *next; /* Next sub-heap */
103 struct tagHEAP *heap; /* Main heap structure */
104 DWORD magic; /* Magic number */
107 #define SUBHEAP_MAGIC ((DWORD)('S' | ('U'<<8) | ('B'<<16) | ('H'<<24)))
109 typedef struct tagHEAP
111 SUBHEAP subheap; /* First sub-heap */
112 struct tagHEAP *next; /* Next heap for this process */
113 CRITICAL_SECTION critSection; /* Critical section for serialization */
114 FREE_LIST_ENTRY freeList[HEAP_NB_FREE_LISTS]; /* Free lists */
115 DWORD flags; /* Heap flags */
116 DWORD magic; /* Magic number */
119 #define HEAP_MAGIC ((DWORD)('H' | ('E'<<8) | ('A'<<16) | ('P'<<24)))
121 #define HEAP_DEF_SIZE 0x110000 /* Default heap size = 1Mb + 64Kb */
122 #define HEAP_MIN_BLOCK_SIZE (8+sizeof(ARENA_FREE)) /* Min. heap block size */
123 #define COMMIT_MASK 0xffff /* bitmask for commit/decommit granularity */
125 static HANDLE processHeap; /* main process heap */
127 static HEAP *firstHeap; /* head of secondary heaps list */
129 static BOOL HEAP_IsRealArena( HEAP *heapPtr, DWORD flags, LPCVOID block, BOOL quiet );
131 /* SetLastError for ntdll */
132 inline static void set_status( NTSTATUS status )
134 #if defined(__i386__) && defined(__GNUC__)
135 /* in this case SetLastError is an inline function so we can use it */
136 SetLastError( RtlNtStatusToDosError( status ) );
138 /* cannot use SetLastError, do it manually */
139 NtCurrentTeb()->last_error = RtlNtStatusToDosError( status );
143 /* set the process main heap */
144 static void set_process_heap( HANDLE heap )
146 NtCurrentTeb()->Peb->ProcessHeap = heap;
150 /* mark a block of memory as free for debugging purposes */
151 static inline void mark_block_free( void *ptr, size_t size )
153 if (TRACE_ON(heap)) memset( ptr, ARENA_FREE_FILLER, size );
154 #ifdef VALGRIND_MAKE_NOACCESS
155 VALGRIND_DISCARD( VALGRIND_MAKE_NOACCESS( ptr, size ));
159 /* mark a block of memory as initialized for debugging purposes */
160 static inline void mark_block_initialized( void *ptr, size_t size )
162 #ifdef VALGRIND_MAKE_READABLE
163 VALGRIND_DISCARD( VALGRIND_MAKE_READABLE( ptr, size ));
167 /* mark a block of memory as uninitialized for debugging purposes */
168 static inline void mark_block_uninitialized( void *ptr, size_t size )
170 #ifdef VALGRIND_MAKE_WRITABLE
171 VALGRIND_DISCARD( VALGRIND_MAKE_WRITABLE( ptr, size ));
175 memset( ptr, ARENA_INUSE_FILLER, size );
176 #ifdef VALGRIND_MAKE_WRITABLE
177 /* make it uninitialized to valgrind again */
178 VALGRIND_DISCARD( VALGRIND_MAKE_WRITABLE( ptr, size ));
183 /* clear contents of a block of memory */
184 static inline void clear_block( void *ptr, size_t size )
186 mark_block_initialized( ptr, size );
187 memset( ptr, 0, size );
190 /***********************************************************************
193 void HEAP_Dump( HEAP *heap )
199 DPRINTF( "Heap: %08lx\n", (DWORD)heap );
200 DPRINTF( "Next: %08lx Sub-heaps: %08lx",
201 (DWORD)heap->next, (DWORD)&heap->subheap );
202 subheap = &heap->subheap;
203 while (subheap->next)
205 DPRINTF( " -> %08lx", (DWORD)subheap->next );
206 subheap = subheap->next;
209 DPRINTF( "\nFree lists:\n Block Stat Size Id\n" );
210 for (i = 0; i < HEAP_NB_FREE_LISTS; i++)
211 DPRINTF( "%08lx free %08lx prev=%08lx next=%08lx\n",
212 (DWORD)&heap->freeList[i].arena, heap->freeList[i].size,
213 (DWORD)heap->freeList[i].arena.prev,
214 (DWORD)heap->freeList[i].arena.next );
216 subheap = &heap->subheap;
219 DWORD freeSize = 0, usedSize = 0, arenaSize = subheap->headerSize;
220 DPRINTF( "\n\nSub-heap %08lx: size=%08lx committed=%08lx\n",
221 (DWORD)subheap, subheap->size, subheap->commitSize );
223 DPRINTF( "\n Block Stat Size Id\n" );
224 ptr = (char*)subheap + subheap->headerSize;
225 while (ptr < (char *)subheap + subheap->size)
227 if (*(DWORD *)ptr & ARENA_FLAG_FREE)
229 ARENA_FREE *pArena = (ARENA_FREE *)ptr;
230 DPRINTF( "%08lx free %08lx prev=%08lx next=%08lx\n",
231 (DWORD)pArena, pArena->size & ARENA_SIZE_MASK,
232 (DWORD)pArena->prev, (DWORD)pArena->next);
233 ptr += sizeof(*pArena) + (pArena->size & ARENA_SIZE_MASK);
234 arenaSize += sizeof(ARENA_FREE);
235 freeSize += pArena->size & ARENA_SIZE_MASK;
237 else if (*(DWORD *)ptr & ARENA_FLAG_PREV_FREE)
239 ARENA_INUSE *pArena = (ARENA_INUSE *)ptr;
240 DPRINTF( "%08lx Used %08lx back=%08lx\n",
241 (DWORD)pArena, pArena->size & ARENA_SIZE_MASK, *((DWORD *)pArena - 1) );
242 ptr += sizeof(*pArena) + (pArena->size & ARENA_SIZE_MASK);
243 arenaSize += sizeof(ARENA_INUSE);
244 usedSize += pArena->size & ARENA_SIZE_MASK;
248 ARENA_INUSE *pArena = (ARENA_INUSE *)ptr;
249 DPRINTF( "%08lx used %08lx\n",
250 (DWORD)pArena, pArena->size & ARENA_SIZE_MASK );
251 ptr += sizeof(*pArena) + (pArena->size & ARENA_SIZE_MASK);
252 arenaSize += sizeof(ARENA_INUSE);
253 usedSize += pArena->size & ARENA_SIZE_MASK;
256 DPRINTF( "\nTotal: Size=%08lx Committed=%08lx Free=%08lx Used=%08lx Arenas=%08lx (%ld%%)\n\n",
257 subheap->size, subheap->commitSize, freeSize, usedSize,
258 arenaSize, (arenaSize * 100) / subheap->size );
259 subheap = subheap->next;
264 /***********************************************************************
267 * Pointer to the heap
270 static HEAP *HEAP_GetPtr(
271 HANDLE heap /* [in] Handle to the heap */
273 HEAP *heapPtr = (HEAP *)heap;
274 if (!heapPtr || (heapPtr->magic != HEAP_MAGIC))
276 ERR("Invalid heap %p!\n", heap );
279 if (TRACE_ON(heap) && !HEAP_IsRealArena( heapPtr, 0, NULL, NOISY ))
281 HEAP_Dump( heapPtr );
289 /***********************************************************************
290 * HEAP_InsertFreeBlock
292 * Insert a free block into the free list.
294 static inline void HEAP_InsertFreeBlock( HEAP *heap, ARENA_FREE *pArena, BOOL last )
296 FREE_LIST_ENTRY *pEntry = heap->freeList;
297 while (pEntry->size < pArena->size) pEntry++;
300 /* insert at end of free list, i.e. before the next free list entry */
302 if (pEntry == &heap->freeList[HEAP_NB_FREE_LISTS]) pEntry = heap->freeList;
303 pArena->prev = pEntry->arena.prev;
304 pArena->prev->next = pArena;
305 pArena->next = &pEntry->arena;
306 pEntry->arena.prev = pArena;
310 /* insert at head of free list */
311 pArena->next = pEntry->arena.next;
312 pArena->next->prev = pArena;
313 pArena->prev = &pEntry->arena;
314 pEntry->arena.next = pArena;
316 pArena->size |= ARENA_FLAG_FREE;
320 /***********************************************************************
322 * Find the sub-heap containing a given address.
328 static SUBHEAP *HEAP_FindSubHeap(
329 HEAP *heap, /* [in] Heap pointer */
330 LPCVOID ptr /* [in] Address */
332 SUBHEAP *sub = &heap->subheap;
335 if (((char *)ptr >= (char *)sub) &&
336 ((char *)ptr < (char *)sub + sub->size)) return sub;
343 /***********************************************************************
346 * Make sure the heap storage is committed up to (not including) ptr.
348 static inline BOOL HEAP_Commit( SUBHEAP *subheap, void *ptr )
350 DWORD size = (DWORD)((char *)ptr - (char *)subheap);
351 size = (size + COMMIT_MASK) & ~COMMIT_MASK;
352 if (size > subheap->size) size = subheap->size;
353 if (size <= subheap->commitSize) return TRUE;
354 size -= subheap->commitSize;
355 if (NtAllocateVirtualMemory( GetCurrentProcess(), &ptr, (char *)subheap + subheap->commitSize,
356 &size, MEM_COMMIT, PAGE_EXECUTE_READWRITE))
358 WARN("Could not commit %08lx bytes at %08lx for heap %08lx\n",
359 size, (DWORD)((char *)subheap + subheap->commitSize),
360 (DWORD)subheap->heap );
363 subheap->commitSize += size;
368 /***********************************************************************
371 * If possible, decommit the heap storage from (including) 'ptr'.
373 static inline BOOL HEAP_Decommit( SUBHEAP *subheap, void *ptr )
378 DWORD size = (DWORD)((char *)ptr - (char *)subheap);
379 /* round to next block and add one full block */
380 size = ((size + COMMIT_MASK) & ~COMMIT_MASK) + COMMIT_MASK + 1;
381 if (size >= subheap->commitSize) return TRUE;
382 decommit_size = subheap->commitSize - size;
383 addr = (char *)subheap + size;
385 if (NtFreeVirtualMemory( GetCurrentProcess(), &addr, &decommit_size, MEM_DECOMMIT ))
387 WARN("Could not decommit %08lx bytes at %08lx for heap %p\n",
388 decommit_size, (DWORD)((char *)subheap + size), subheap->heap );
391 subheap->commitSize -= decommit_size;
396 /***********************************************************************
397 * HEAP_CreateFreeBlock
399 * Create a free block at a specified address. 'size' is the size of the
400 * whole block, including the new arena.
402 static void HEAP_CreateFreeBlock( SUBHEAP *subheap, void *ptr, DWORD size )
408 /* Create a free arena */
409 mark_block_uninitialized( ptr, sizeof( ARENA_FREE ) );
410 pFree = (ARENA_FREE *)ptr;
411 pFree->magic = ARENA_FREE_MAGIC;
413 /* If debugging, erase the freed block content */
415 pEnd = (char *)ptr + size;
416 if (pEnd > (char *)subheap + subheap->commitSize) pEnd = (char *)subheap + subheap->commitSize;
417 if (pEnd > (char *)(pFree + 1)) mark_block_free( pFree + 1, pEnd - (char *)(pFree + 1) );
419 /* Check if next block is free also */
421 if (((char *)ptr + size < (char *)subheap + subheap->size) &&
422 (*(DWORD *)((char *)ptr + size) & ARENA_FLAG_FREE))
424 /* Remove the next arena from the free list */
425 ARENA_FREE *pNext = (ARENA_FREE *)((char *)ptr + size);
426 pNext->next->prev = pNext->prev;
427 pNext->prev->next = pNext->next;
428 size += (pNext->size & ARENA_SIZE_MASK) + sizeof(*pNext);
429 mark_block_free( pNext, sizeof(ARENA_FREE) );
432 /* Set the next block PREV_FREE flag and pointer */
434 last = ((char *)ptr + size >= (char *)subheap + subheap->size);
437 DWORD *pNext = (DWORD *)((char *)ptr + size);
438 *pNext |= ARENA_FLAG_PREV_FREE;
439 mark_block_initialized( pNext - 1, sizeof( ARENA_FREE * ) );
440 *(ARENA_FREE **)(pNext - 1) = pFree;
443 /* Last, insert the new block into the free list */
445 pFree->size = size - sizeof(*pFree);
446 HEAP_InsertFreeBlock( subheap->heap, pFree, last );
450 /***********************************************************************
451 * HEAP_MakeInUseBlockFree
453 * Turn an in-use block into a free block. Can also decommit the end of
454 * the heap, and possibly even free the sub-heap altogether.
456 static void HEAP_MakeInUseBlockFree( SUBHEAP *subheap, ARENA_INUSE *pArena )
459 DWORD size = (pArena->size & ARENA_SIZE_MASK) + sizeof(*pArena);
461 /* Check if we can merge with previous block */
463 if (pArena->size & ARENA_FLAG_PREV_FREE)
465 pFree = *((ARENA_FREE **)pArena - 1);
466 size += (pFree->size & ARENA_SIZE_MASK) + sizeof(ARENA_FREE);
467 /* Remove it from the free list */
468 pFree->next->prev = pFree->prev;
469 pFree->prev->next = pFree->next;
471 else pFree = (ARENA_FREE *)pArena;
473 /* Create a free block */
475 HEAP_CreateFreeBlock( subheap, pFree, size );
476 size = (pFree->size & ARENA_SIZE_MASK) + sizeof(ARENA_FREE);
477 if ((char *)pFree + size < (char *)subheap + subheap->size)
478 return; /* Not the last block, so nothing more to do */
480 /* Free the whole sub-heap if it's empty and not the original one */
482 if (((char *)pFree == (char *)subheap + subheap->headerSize) &&
483 (subheap != &subheap->heap->subheap))
486 SUBHEAP *pPrev = &subheap->heap->subheap;
487 /* Remove the free block from the list */
488 pFree->next->prev = pFree->prev;
489 pFree->prev->next = pFree->next;
490 /* Remove the subheap from the list */
491 while (pPrev && (pPrev->next != subheap)) pPrev = pPrev->next;
492 if (pPrev) pPrev->next = subheap->next;
493 /* Free the memory */
495 NtFreeVirtualMemory( GetCurrentProcess(), (void **)&subheap, &size, MEM_RELEASE );
499 /* Decommit the end of the heap */
501 if (!(subheap->heap->flags & HEAP_SHARED)) HEAP_Decommit( subheap, pFree + 1 );
505 /***********************************************************************
508 * Shrink an in-use block.
510 static void HEAP_ShrinkBlock(SUBHEAP *subheap, ARENA_INUSE *pArena, DWORD size)
512 if ((pArena->size & ARENA_SIZE_MASK) >= size + HEAP_MIN_BLOCK_SIZE)
514 HEAP_CreateFreeBlock( subheap, (char *)(pArena + 1) + size,
515 (pArena->size & ARENA_SIZE_MASK) - size );
516 /* assign size plus previous arena flags */
517 pArena->size = size | (pArena->size & ~ARENA_SIZE_MASK);
521 /* Turn off PREV_FREE flag in next block */
522 char *pNext = (char *)(pArena + 1) + (pArena->size & ARENA_SIZE_MASK);
523 if (pNext < (char *)subheap + subheap->size)
524 *(DWORD *)pNext &= ~ARENA_FLAG_PREV_FREE;
528 /***********************************************************************
531 static BOOL HEAP_InitSubHeap( HEAP *heap, LPVOID address, DWORD flags,
532 DWORD commitSize, DWORD totalSize )
535 FREE_LIST_ENTRY *pEntry;
540 if (flags & HEAP_SHARED)
541 commitSize = totalSize; /* always commit everything in a shared heap */
542 if (NtAllocateVirtualMemory( GetCurrentProcess(), &address, address,
543 &commitSize, MEM_COMMIT, PAGE_EXECUTE_READWRITE))
545 WARN("Could not commit %08lx bytes for sub-heap %p\n", commitSize, address );
549 /* Fill the sub-heap structure */
551 subheap = (SUBHEAP *)address;
552 subheap->heap = heap;
553 subheap->size = totalSize;
554 subheap->commitSize = commitSize;
555 subheap->magic = SUBHEAP_MAGIC;
557 if ( subheap != (SUBHEAP *)heap )
559 /* If this is a secondary subheap, insert it into list */
561 subheap->headerSize = ROUND_SIZE( sizeof(SUBHEAP) );
562 subheap->next = heap->subheap.next;
563 heap->subheap.next = subheap;
567 /* If this is a primary subheap, initialize main heap */
569 subheap->headerSize = ROUND_SIZE( sizeof(HEAP) );
570 subheap->next = NULL;
573 heap->magic = HEAP_MAGIC;
575 /* Build the free lists */
577 for (i = 0, pEntry = heap->freeList; i < HEAP_NB_FREE_LISTS; i++, pEntry++)
579 pEntry->size = HEAP_freeListSizes[i];
580 pEntry->arena.size = 0 | ARENA_FLAG_FREE;
581 pEntry->arena.next = i < HEAP_NB_FREE_LISTS-1 ?
582 &heap->freeList[i+1].arena : &heap->freeList[0].arena;
583 pEntry->arena.prev = i ? &heap->freeList[i-1].arena :
584 &heap->freeList[HEAP_NB_FREE_LISTS-1].arena;
585 pEntry->arena.magic = ARENA_FREE_MAGIC;
588 /* Initialize critical section */
590 RtlInitializeCriticalSection( &heap->critSection );
591 if (flags & HEAP_SHARED)
593 /* let's assume that only one thread at a time will try to do this */
594 HANDLE sem = heap->critSection.LockSemaphore;
595 if (!sem) NtCreateSemaphore( &sem, SEMAPHORE_ALL_ACCESS, NULL, 0, 1 );
597 NtDuplicateObject( GetCurrentProcess(), sem, GetCurrentProcess(), &sem, 0, 0,
598 DUP_HANDLE_MAKE_GLOBAL | DUP_HANDLE_SAME_ACCESS | DUP_HANDLE_CLOSE_SOURCE );
599 heap->critSection.LockSemaphore = sem;
603 /* Create the first free block */
605 HEAP_CreateFreeBlock( subheap, (LPBYTE)subheap + subheap->headerSize,
606 subheap->size - subheap->headerSize );
611 /***********************************************************************
614 * Create a sub-heap of the given size.
615 * If heap == NULL, creates a main heap.
617 static SUBHEAP *HEAP_CreateSubHeap( HEAP *heap, void *base, DWORD flags,
618 DWORD commitSize, DWORD totalSize )
620 LPVOID address = base;
622 /* round-up sizes on a 64K boundary */
623 totalSize = (totalSize + 0xffff) & 0xffff0000;
624 commitSize = (commitSize + 0xffff) & 0xffff0000;
625 if (!commitSize) commitSize = 0x10000;
626 if (totalSize < commitSize) totalSize = commitSize;
630 /* allocate the memory block */
631 if (NtAllocateVirtualMemory( GetCurrentProcess(), &address, NULL, &totalSize,
632 MEM_RESERVE, PAGE_EXECUTE_READWRITE ))
634 WARN("Could not allocate %08lx bytes\n", totalSize );
639 /* Initialize subheap */
641 if (!HEAP_InitSubHeap( heap ? heap : (HEAP *)address,
642 address, flags, commitSize, totalSize ))
645 if (!base) NtFreeVirtualMemory( GetCurrentProcess(), &address, &size, MEM_RELEASE );
649 return (SUBHEAP *)address;
653 /***********************************************************************
656 * Find a free block at least as large as the requested size, and make sure
657 * the requested size is committed.
659 static ARENA_FREE *HEAP_FindFreeBlock( HEAP *heap, DWORD size,
660 SUBHEAP **ppSubHeap )
664 FREE_LIST_ENTRY *pEntry = heap->freeList;
666 /* Find a suitable free list, and in it find a block large enough */
668 while (pEntry->size < size) pEntry++;
669 pArena = pEntry->arena.next;
670 while (pArena != &heap->freeList[0].arena)
672 DWORD arena_size = (pArena->size & ARENA_SIZE_MASK) +
673 sizeof(ARENA_FREE) - sizeof(ARENA_INUSE);
674 if (arena_size >= size)
676 subheap = HEAP_FindSubHeap( heap, pArena );
677 if (!HEAP_Commit( subheap, (char *)pArena + sizeof(ARENA_INUSE)
678 + size + HEAP_MIN_BLOCK_SIZE))
680 *ppSubHeap = subheap;
683 pArena = pArena->next;
686 /* If no block was found, attempt to grow the heap */
688 if (!(heap->flags & HEAP_GROWABLE))
690 WARN("Not enough space in heap %08lx for %08lx bytes\n",
694 /* make sure that we have a big enough size *committed* to fit another
695 * last free arena in !
696 * So just one heap struct, one first free arena which will eventually
697 * get inuse, and HEAP_MIN_BLOCK_SIZE for the second free arena that
698 * might get assigned all remaining free space in HEAP_ShrinkBlock() */
699 size += ROUND_SIZE(sizeof(SUBHEAP)) + sizeof(ARENA_INUSE) + HEAP_MIN_BLOCK_SIZE;
700 if (!(subheap = HEAP_CreateSubHeap( heap, NULL, heap->flags, size,
701 max( HEAP_DEF_SIZE, size ) )))
704 TRACE("created new sub-heap %08lx of %08lx bytes for heap %08lx\n",
705 (DWORD)subheap, size, (DWORD)heap );
707 *ppSubHeap = subheap;
708 return (ARENA_FREE *)(subheap + 1);
712 /***********************************************************************
713 * HEAP_IsValidArenaPtr
715 * Check that the pointer is inside the range possible for arenas.
717 static BOOL HEAP_IsValidArenaPtr( HEAP *heap, void *ptr )
720 SUBHEAP *subheap = HEAP_FindSubHeap( heap, ptr );
721 if (!subheap) return FALSE;
722 if ((char *)ptr >= (char *)subheap + subheap->headerSize) return TRUE;
723 if (subheap != &heap->subheap) return FALSE;
724 for (i = 0; i < HEAP_NB_FREE_LISTS; i++)
725 if (ptr == (void *)&heap->freeList[i].arena) return TRUE;
730 /***********************************************************************
731 * HEAP_ValidateFreeArena
733 static BOOL HEAP_ValidateFreeArena( SUBHEAP *subheap, ARENA_FREE *pArena )
735 char *heapEnd = (char *)subheap + subheap->size;
737 /* Check for unaligned pointers */
738 if ( (long)pArena % ALIGNMENT != 0 )
740 ERR( "Heap %08lx: unaligned arena pointer %08lx\n",
741 (DWORD)subheap->heap, (DWORD)pArena );
745 /* Check magic number */
746 if (pArena->magic != ARENA_FREE_MAGIC)
748 ERR("Heap %08lx: invalid free arena magic for %08lx\n",
749 (DWORD)subheap->heap, (DWORD)pArena );
752 /* Check size flags */
753 if (!(pArena->size & ARENA_FLAG_FREE) ||
754 (pArena->size & ARENA_FLAG_PREV_FREE))
756 ERR("Heap %08lx: bad flags %lx for free arena %08lx\n",
757 (DWORD)subheap->heap, pArena->size & ~ARENA_SIZE_MASK, (DWORD)pArena );
759 /* Check arena size */
760 if ((char *)(pArena + 1) + (pArena->size & ARENA_SIZE_MASK) > heapEnd)
762 ERR("Heap %08lx: bad size %08lx for free arena %08lx\n",
763 (DWORD)subheap->heap, (DWORD)pArena->size & ARENA_SIZE_MASK, (DWORD)pArena );
766 /* Check that next pointer is valid */
767 if (!HEAP_IsValidArenaPtr( subheap->heap, pArena->next ))
769 ERR("Heap %08lx: bad next ptr %08lx for arena %08lx\n",
770 (DWORD)subheap->heap, (DWORD)pArena->next, (DWORD)pArena );
773 /* Check that next arena is free */
774 if (!(pArena->next->size & ARENA_FLAG_FREE) ||
775 (pArena->next->magic != ARENA_FREE_MAGIC))
777 ERR("Heap %08lx: next arena %08lx invalid for %08lx\n",
778 (DWORD)subheap->heap, (DWORD)pArena->next, (DWORD)pArena );
781 /* Check that prev pointer is valid */
782 if (!HEAP_IsValidArenaPtr( subheap->heap, pArena->prev ))
784 ERR("Heap %08lx: bad prev ptr %08lx for arena %08lx\n",
785 (DWORD)subheap->heap, (DWORD)pArena->prev, (DWORD)pArena );
788 /* Check that prev arena is free */
789 if (!(pArena->prev->size & ARENA_FLAG_FREE) ||
790 (pArena->prev->magic != ARENA_FREE_MAGIC))
792 /* this often means that the prev arena got overwritten
793 * by a memory write before that prev arena */
794 ERR("Heap %08lx: prev arena %08lx invalid for %08lx\n",
795 (DWORD)subheap->heap, (DWORD)pArena->prev, (DWORD)pArena );
798 /* Check that next block has PREV_FREE flag */
799 if ((char *)(pArena + 1) + (pArena->size & ARENA_SIZE_MASK) < heapEnd)
801 if (!(*(DWORD *)((char *)(pArena + 1) +
802 (pArena->size & ARENA_SIZE_MASK)) & ARENA_FLAG_PREV_FREE))
804 ERR("Heap %08lx: free arena %08lx next block has no PREV_FREE flag\n",
805 (DWORD)subheap->heap, (DWORD)pArena );
808 /* Check next block back pointer */
809 if (*((ARENA_FREE **)((char *)(pArena + 1) +
810 (pArena->size & ARENA_SIZE_MASK)) - 1) != pArena)
812 ERR("Heap %08lx: arena %08lx has wrong back ptr %08lx\n",
813 (DWORD)subheap->heap, (DWORD)pArena,
814 *((DWORD *)((char *)(pArena+1)+ (pArena->size & ARENA_SIZE_MASK)) - 1));
822 /***********************************************************************
823 * HEAP_ValidateInUseArena
825 static BOOL HEAP_ValidateInUseArena( SUBHEAP *subheap, ARENA_INUSE *pArena, BOOL quiet )
827 char *heapEnd = (char *)subheap + subheap->size;
829 /* Check for unaligned pointers */
830 if ( (long)pArena % ALIGNMENT != 0 )
832 if ( quiet == NOISY )
834 ERR( "Heap %08lx: unaligned arena pointer %08lx\n",
835 (DWORD)subheap->heap, (DWORD)pArena );
836 if ( TRACE_ON(heap) )
837 HEAP_Dump( subheap->heap );
839 else if ( WARN_ON(heap) )
841 WARN( "Heap %08lx: unaligned arena pointer %08lx\n",
842 (DWORD)subheap->heap, (DWORD)pArena );
843 if ( TRACE_ON(heap) )
844 HEAP_Dump( subheap->heap );
849 /* Check magic number */
850 if (pArena->magic != ARENA_INUSE_MAGIC)
852 if (quiet == NOISY) {
853 ERR("Heap %08lx: invalid in-use arena magic for %08lx\n",
854 (DWORD)subheap->heap, (DWORD)pArena );
856 HEAP_Dump( subheap->heap );
857 } else if (WARN_ON(heap)) {
858 WARN("Heap %08lx: invalid in-use arena magic for %08lx\n",
859 (DWORD)subheap->heap, (DWORD)pArena );
861 HEAP_Dump( subheap->heap );
865 /* Check size flags */
866 if (pArena->size & ARENA_FLAG_FREE)
868 ERR("Heap %08lx: bad flags %lx for in-use arena %08lx\n",
869 (DWORD)subheap->heap, pArena->size & ~ARENA_SIZE_MASK, (DWORD)pArena );
872 /* Check arena size */
873 if ((char *)(pArena + 1) + (pArena->size & ARENA_SIZE_MASK) > heapEnd)
875 ERR("Heap %08lx: bad size %08lx for in-use arena %08lx\n",
876 (DWORD)subheap->heap, (DWORD)pArena->size & ARENA_SIZE_MASK, (DWORD)pArena );
879 /* Check next arena PREV_FREE flag */
880 if (((char *)(pArena + 1) + (pArena->size & ARENA_SIZE_MASK) < heapEnd) &&
881 (*(DWORD *)((char *)(pArena + 1) + (pArena->size & ARENA_SIZE_MASK)) & ARENA_FLAG_PREV_FREE))
883 ERR("Heap %08lx: in-use arena %08lx next block has PREV_FREE flag\n",
884 (DWORD)subheap->heap, (DWORD)pArena );
887 /* Check prev free arena */
888 if (pArena->size & ARENA_FLAG_PREV_FREE)
890 ARENA_FREE *pPrev = *((ARENA_FREE **)pArena - 1);
891 /* Check prev pointer */
892 if (!HEAP_IsValidArenaPtr( subheap->heap, pPrev ))
894 ERR("Heap %08lx: bad back ptr %08lx for arena %08lx\n",
895 (DWORD)subheap->heap, (DWORD)pPrev, (DWORD)pArena );
898 /* Check that prev arena is free */
899 if (!(pPrev->size & ARENA_FLAG_FREE) ||
900 (pPrev->magic != ARENA_FREE_MAGIC))
902 ERR("Heap %08lx: prev arena %08lx invalid for in-use %08lx\n",
903 (DWORD)subheap->heap, (DWORD)pPrev, (DWORD)pArena );
906 /* Check that prev arena is really the previous block */
907 if ((char *)(pPrev + 1) + (pPrev->size & ARENA_SIZE_MASK) != (char *)pArena)
909 ERR("Heap %08lx: prev arena %08lx is not prev for in-use %08lx\n",
910 (DWORD)subheap->heap, (DWORD)pPrev, (DWORD)pArena );
918 /***********************************************************************
919 * HEAP_IsRealArena [Internal]
920 * Validates a block is a valid arena.
926 static BOOL HEAP_IsRealArena( HEAP *heapPtr, /* [in] ptr to the heap */
927 DWORD flags, /* [in] Bit flags that control access during operation */
928 LPCVOID block, /* [in] Optional pointer to memory block to validate */
929 BOOL quiet ) /* [in] Flag - if true, HEAP_ValidateInUseArena
930 * does not complain */
935 if (!heapPtr || (heapPtr->magic != HEAP_MAGIC))
937 ERR("Invalid heap %p!\n", heapPtr );
941 flags &= HEAP_NO_SERIALIZE;
942 flags |= heapPtr->flags;
943 /* calling HeapLock may result in infinite recursion, so do the critsect directly */
944 if (!(flags & HEAP_NO_SERIALIZE))
945 RtlEnterCriticalSection( &heapPtr->critSection );
949 /* Only check this single memory block */
951 if (!(subheap = HEAP_FindSubHeap( heapPtr, block )) ||
952 ((char *)block < (char *)subheap + subheap->headerSize
953 + sizeof(ARENA_INUSE)))
956 ERR("Heap %p: block %p is not inside heap\n", heapPtr, block );
957 else if (WARN_ON(heap))
958 WARN("Heap %p: block %p is not inside heap\n", heapPtr, block );
961 ret = HEAP_ValidateInUseArena( subheap, (ARENA_INUSE *)block - 1, quiet );
963 if (!(flags & HEAP_NO_SERIALIZE))
964 RtlLeaveCriticalSection( &heapPtr->critSection );
968 subheap = &heapPtr->subheap;
969 while (subheap && ret)
971 char *ptr = (char *)subheap + subheap->headerSize;
972 while (ptr < (char *)subheap + subheap->size)
974 if (*(DWORD *)ptr & ARENA_FLAG_FREE)
976 if (!HEAP_ValidateFreeArena( subheap, (ARENA_FREE *)ptr )) {
980 ptr += sizeof(ARENA_FREE) + (*(DWORD *)ptr & ARENA_SIZE_MASK);
984 if (!HEAP_ValidateInUseArena( subheap, (ARENA_INUSE *)ptr, NOISY )) {
988 ptr += sizeof(ARENA_INUSE) + (*(DWORD *)ptr & ARENA_SIZE_MASK);
991 subheap = subheap->next;
994 if (!(flags & HEAP_NO_SERIALIZE)) RtlLeaveCriticalSection( &heapPtr->critSection );
999 /***********************************************************************
1000 * RtlCreateHeap (NTDLL.@)
1002 * Create a new Heap.
1005 * flags [I] HEAP_ flags from "winnt.h"
1006 * addr [I] Desired base address
1007 * totalSize [I] Total size of the heap, or 0 for a growable heap
1008 * commitSize [I] Amount of heap space to commit
1009 * unknown [I] Not yet understood
1010 * definition [I] Heap definition
1013 * Success: A HANDLE to the newly created heap.
1014 * Failure: a NULL HANDLE.
1016 HANDLE WINAPI RtlCreateHeap( ULONG flags, PVOID addr, ULONG totalSize, ULONG commitSize,
1017 PVOID unknown, PRTL_HEAP_DEFINITION definition )
1021 /* Allocate the heap block */
1025 totalSize = HEAP_DEF_SIZE;
1026 flags |= HEAP_GROWABLE;
1029 if (!(subheap = HEAP_CreateSubHeap( NULL, addr, flags, commitSize, totalSize ))) return 0;
1031 /* link it into the per-process heap list */
1034 HEAP *heapPtr = subheap->heap;
1035 RtlLockHeap( processHeap );
1036 heapPtr->next = firstHeap;
1037 firstHeap = heapPtr;
1038 RtlUnlockHeap( processHeap );
1040 else /* assume the first heap we create is the process main heap */
1042 set_process_heap( (HANDLE)subheap->heap );
1044 return (HANDLE)subheap;
1048 /***********************************************************************
1049 * RtlDestroyHeap (NTDLL.@)
1051 * Destroy a Heap created with RtlCreateHeap().
1054 * heap [I] Heap to destroy.
1057 * Success: A NULL HANDLE, if heap is NULL or it was destroyed
1058 * Failure: The Heap handle, if heap is the process heap.
1060 HANDLE WINAPI RtlDestroyHeap( HANDLE heap )
1062 HEAP *heapPtr = HEAP_GetPtr( heap );
1065 TRACE("%p\n", heap );
1066 if (!heapPtr) return heap;
1068 if (heap == processHeap) return heap; /* cannot delete the main process heap */
1069 else /* remove it from the per-process list */
1072 RtlLockHeap( processHeap );
1074 while (*pptr && *pptr != heapPtr) pptr = &(*pptr)->next;
1075 if (*pptr) *pptr = (*pptr)->next;
1076 RtlUnlockHeap( processHeap );
1079 RtlDeleteCriticalSection( &heapPtr->critSection );
1080 subheap = &heapPtr->subheap;
1083 SUBHEAP *next = subheap->next;
1085 void *addr = subheap;
1086 NtFreeVirtualMemory( GetCurrentProcess(), &addr, &size, MEM_RELEASE );
1093 /***********************************************************************
1094 * RtlAllocateHeap (NTDLL.@)
1096 * Allocate a memory block from a Heap.
1099 * heap [I] Heap to allocate block from
1100 * flags [I] HEAP_ flags from "winnt.h"
1101 * size [I] Size of the memory block to allocate
1104 * Success: A pointer to the newly allocated block
1108 * This call does not SetLastError().
1110 PVOID WINAPI RtlAllocateHeap( HANDLE heap, ULONG flags, ULONG size )
1113 ARENA_INUSE *pInUse;
1115 HEAP *heapPtr = HEAP_GetPtr( heap );
1117 /* Validate the parameters */
1119 if (!heapPtr) return NULL;
1120 flags &= HEAP_GENERATE_EXCEPTIONS | HEAP_NO_SERIALIZE | HEAP_ZERO_MEMORY;
1121 flags |= heapPtr->flags;
1122 size = ROUND_SIZE(size);
1123 if (size < HEAP_MIN_BLOCK_SIZE) size = HEAP_MIN_BLOCK_SIZE;
1125 if (!(flags & HEAP_NO_SERIALIZE)) RtlEnterCriticalSection( &heapPtr->critSection );
1126 /* Locate a suitable free block */
1128 if (!(pArena = HEAP_FindFreeBlock( heapPtr, size, &subheap )))
1130 TRACE("(%p,%08lx,%08lx): returning NULL\n",
1131 heap, flags, size );
1132 if (!(flags & HEAP_NO_SERIALIZE)) RtlLeaveCriticalSection( &heapPtr->critSection );
1133 if (flags & HEAP_GENERATE_EXCEPTIONS) RtlRaiseStatus( STATUS_NO_MEMORY );
1137 /* Remove the arena from the free list */
1139 pArena->next->prev = pArena->prev;
1140 pArena->prev->next = pArena->next;
1142 /* Build the in-use arena */
1144 pInUse = (ARENA_INUSE *)pArena;
1146 /* in-use arena is smaller than free arena,
1147 * so we have to add the difference to the size */
1148 pInUse->size = (pInUse->size & ~ARENA_FLAG_FREE) + sizeof(ARENA_FREE) - sizeof(ARENA_INUSE);
1149 pInUse->magic = ARENA_INUSE_MAGIC;
1151 /* Shrink the block */
1153 HEAP_ShrinkBlock( subheap, pInUse, size );
1155 if (flags & HEAP_ZERO_MEMORY)
1156 clear_block( pInUse + 1, pInUse->size & ARENA_SIZE_MASK );
1158 mark_block_uninitialized( pInUse + 1, pInUse->size & ARENA_SIZE_MASK );
1160 if (!(flags & HEAP_NO_SERIALIZE)) RtlLeaveCriticalSection( &heapPtr->critSection );
1162 TRACE("(%p,%08lx,%08lx): returning %08lx\n",
1163 heap, flags, size, (DWORD)(pInUse + 1) );
1164 return (LPVOID)(pInUse + 1);
1168 /***********************************************************************
1169 * RtlFreeHeap (NTDLL.@)
1171 * Free a memory block allocated with RtlAllocateHeap().
1174 * heap [I] Heap that block was allocated from
1175 * flags [I] HEAP_ flags from "winnt.h"
1176 * ptr [I] Block to free
1179 * Success: TRUE, if ptr is NULL or was freed successfully.
1182 BOOLEAN WINAPI RtlFreeHeap( HANDLE heap, ULONG flags, PVOID ptr )
1184 ARENA_INUSE *pInUse;
1186 HEAP *heapPtr = HEAP_GetPtr( heap );
1188 /* Validate the parameters */
1190 if (!ptr) return TRUE; /* freeing a NULL ptr isn't an error in Win2k */
1193 set_status( STATUS_INVALID_HANDLE );
1197 flags &= HEAP_NO_SERIALIZE;
1198 flags |= heapPtr->flags;
1199 if (!(flags & HEAP_NO_SERIALIZE)) RtlEnterCriticalSection( &heapPtr->critSection );
1200 if (!HEAP_IsRealArena( heapPtr, HEAP_NO_SERIALIZE, ptr, QUIET ))
1202 if (!(flags & HEAP_NO_SERIALIZE)) RtlLeaveCriticalSection( &heapPtr->critSection );
1203 set_status( STATUS_INVALID_PARAMETER );
1204 TRACE("(%p,%08lx,%08lx): returning FALSE\n",
1205 heap, flags, (DWORD)ptr );
1209 /* Turn the block into a free block */
1211 pInUse = (ARENA_INUSE *)ptr - 1;
1212 subheap = HEAP_FindSubHeap( heapPtr, pInUse );
1213 HEAP_MakeInUseBlockFree( subheap, pInUse );
1215 if (!(flags & HEAP_NO_SERIALIZE)) RtlLeaveCriticalSection( &heapPtr->critSection );
1217 TRACE("(%p,%08lx,%08lx): returning TRUE\n",
1218 heap, flags, (DWORD)ptr );
1223 /***********************************************************************
1224 * RtlReAllocateHeap (NTDLL.@)
1226 * Change the size of a memory block allocated with RtlAllocateHeap().
1229 * heap [I] Heap that block was allocated from
1230 * flags [I] HEAP_ flags from "winnt.h"
1231 * ptr [I] Block to resize
1232 * size [I] Size of the memory block to allocate
1235 * Success: A pointer to the resized block (which may be different).
1238 PVOID WINAPI RtlReAllocateHeap( HANDLE heap, ULONG flags, PVOID ptr, ULONG size )
1240 ARENA_INUSE *pArena;
1245 if (!ptr) return RtlAllocateHeap( heap, flags, size ); /* FIXME: correct? */
1246 if (!(heapPtr = HEAP_GetPtr( heap )))
1248 set_status( STATUS_INVALID_HANDLE );
1252 /* Validate the parameters */
1254 flags &= HEAP_GENERATE_EXCEPTIONS | HEAP_NO_SERIALIZE | HEAP_ZERO_MEMORY |
1255 HEAP_REALLOC_IN_PLACE_ONLY;
1256 flags |= heapPtr->flags;
1257 size = ROUND_SIZE(size);
1258 if (size < HEAP_MIN_BLOCK_SIZE) size = HEAP_MIN_BLOCK_SIZE;
1260 if (!(flags & HEAP_NO_SERIALIZE)) RtlEnterCriticalSection( &heapPtr->critSection );
1261 if (!HEAP_IsRealArena( heapPtr, HEAP_NO_SERIALIZE, ptr, QUIET ))
1263 if (!(flags & HEAP_NO_SERIALIZE)) RtlLeaveCriticalSection( &heapPtr->critSection );
1264 set_status( STATUS_INVALID_PARAMETER );
1265 TRACE("(%p,%08lx,%08lx,%08lx): returning NULL\n",
1266 heap, flags, (DWORD)ptr, size );
1270 /* Check if we need to grow the block */
1272 pArena = (ARENA_INUSE *)ptr - 1;
1273 subheap = HEAP_FindSubHeap( heapPtr, pArena );
1274 oldSize = (pArena->size & ARENA_SIZE_MASK);
1277 char *pNext = (char *)(pArena + 1) + oldSize;
1278 if ((pNext < (char *)subheap + subheap->size) &&
1279 (*(DWORD *)pNext & ARENA_FLAG_FREE) &&
1280 (oldSize + (*(DWORD *)pNext & ARENA_SIZE_MASK) + sizeof(ARENA_FREE) >= size))
1282 /* The next block is free and large enough */
1283 ARENA_FREE *pFree = (ARENA_FREE *)pNext;
1284 pFree->next->prev = pFree->prev;
1285 pFree->prev->next = pFree->next;
1286 pArena->size += (pFree->size & ARENA_SIZE_MASK) + sizeof(*pFree);
1287 if (!HEAP_Commit( subheap, (char *)pArena + sizeof(ARENA_INUSE)
1288 + size + HEAP_MIN_BLOCK_SIZE))
1290 if (!(flags & HEAP_NO_SERIALIZE)) RtlLeaveCriticalSection( &heapPtr->critSection );
1291 if (flags & HEAP_GENERATE_EXCEPTIONS) RtlRaiseStatus( STATUS_NO_MEMORY );
1292 set_status( STATUS_NO_MEMORY );
1295 HEAP_ShrinkBlock( subheap, pArena, size );
1297 else /* Do it the hard way */
1300 ARENA_INUSE *pInUse;
1301 SUBHEAP *newsubheap;
1303 if ((flags & HEAP_REALLOC_IN_PLACE_ONLY) ||
1304 !(pNew = HEAP_FindFreeBlock( heapPtr, size, &newsubheap )))
1306 if (!(flags & HEAP_NO_SERIALIZE)) RtlLeaveCriticalSection( &heapPtr->critSection );
1307 if (flags & HEAP_GENERATE_EXCEPTIONS) RtlRaiseStatus( STATUS_NO_MEMORY );
1308 set_status( STATUS_NO_MEMORY );
1312 /* Build the in-use arena */
1314 pNew->next->prev = pNew->prev;
1315 pNew->prev->next = pNew->next;
1316 pInUse = (ARENA_INUSE *)pNew;
1317 pInUse->size = (pInUse->size & ~ARENA_FLAG_FREE)
1318 + sizeof(ARENA_FREE) - sizeof(ARENA_INUSE);
1319 pInUse->magic = ARENA_INUSE_MAGIC;
1320 HEAP_ShrinkBlock( newsubheap, pInUse, size );
1321 mark_block_initialized( pInUse + 1, oldSize );
1322 memcpy( pInUse + 1, pArena + 1, oldSize );
1324 /* Free the previous block */
1326 HEAP_MakeInUseBlockFree( subheap, pArena );
1327 subheap = newsubheap;
1331 else HEAP_ShrinkBlock( subheap, pArena, size ); /* Shrink the block */
1333 /* Clear the extra bytes if needed */
1337 if (flags & HEAP_ZERO_MEMORY)
1338 clear_block( (char *)(pArena + 1) + oldSize,
1339 (pArena->size & ARENA_SIZE_MASK) - oldSize );
1341 mark_block_uninitialized( (char *)(pArena + 1) + oldSize,
1342 (pArena->size & ARENA_SIZE_MASK) - oldSize );
1345 /* Return the new arena */
1347 if (!(flags & HEAP_NO_SERIALIZE)) RtlLeaveCriticalSection( &heapPtr->critSection );
1349 TRACE("(%p,%08lx,%08lx,%08lx): returning %08lx\n",
1350 heap, flags, (DWORD)ptr, size, (DWORD)(pArena + 1) );
1351 return (LPVOID)(pArena + 1);
1355 /***********************************************************************
1356 * RtlCompactHeap (NTDLL.@)
1358 * Compact the free space in a Heap.
1361 * heap [I] Heap that block was allocated from
1362 * flags [I] HEAP_ flags from "winnt.h"
1365 * The number of bytes compacted.
1368 * This function is a harmless stub.
1370 ULONG WINAPI RtlCompactHeap( HANDLE heap, ULONG flags )
1377 /***********************************************************************
1378 * RtlLockHeap (NTDLL.@)
1383 * heap [I] Heap to lock
1386 * Success: TRUE. The Heap is locked.
1387 * Failure: FALSE, if heap is invalid.
1389 BOOLEAN WINAPI RtlLockHeap( HANDLE heap )
1391 HEAP *heapPtr = HEAP_GetPtr( heap );
1392 if (!heapPtr) return FALSE;
1393 RtlEnterCriticalSection( &heapPtr->critSection );
1398 /***********************************************************************
1399 * RtlUnlockHeap (NTDLL.@)
1404 * heap [I] Heap to unlock
1407 * Success: TRUE. The Heap is unlocked.
1408 * Failure: FALSE, if heap is invalid.
1410 BOOLEAN WINAPI RtlUnlockHeap( HANDLE heap )
1412 HEAP *heapPtr = HEAP_GetPtr( heap );
1413 if (!heapPtr) return FALSE;
1414 RtlLeaveCriticalSection( &heapPtr->critSection );
1419 /***********************************************************************
1420 * RtlSizeHeap (NTDLL.@)
1422 * Get the actual size of a memory block allocated from a Heap.
1425 * heap [I] Heap that block was allocated from
1426 * flags [I] HEAP_ flags from "winnt.h"
1427 * ptr [I] Block to get the size of
1430 * Success: The size of the block.
1431 * Failure: -1, heap or ptr are invalid.
1434 * The size may be bigger than what was passed to RtlAllocateHeap().
1436 ULONG WINAPI RtlSizeHeap( HANDLE heap, ULONG flags, PVOID ptr )
1439 HEAP *heapPtr = HEAP_GetPtr( heap );
1443 set_status( STATUS_INVALID_HANDLE );
1446 flags &= HEAP_NO_SERIALIZE;
1447 flags |= heapPtr->flags;
1448 if (!(flags & HEAP_NO_SERIALIZE)) RtlEnterCriticalSection( &heapPtr->critSection );
1449 if (!HEAP_IsRealArena( heapPtr, HEAP_NO_SERIALIZE, ptr, QUIET ))
1451 set_status( STATUS_INVALID_PARAMETER );
1456 ARENA_INUSE *pArena = (ARENA_INUSE *)ptr - 1;
1457 ret = pArena->size & ARENA_SIZE_MASK;
1459 if (!(flags & HEAP_NO_SERIALIZE)) RtlLeaveCriticalSection( &heapPtr->critSection );
1461 TRACE("(%p,%08lx,%08lx): returning %08lx\n",
1462 heap, flags, (DWORD)ptr, ret );
1467 /***********************************************************************
1468 * RtlValidateHeap (NTDLL.@)
1470 * Determine if a block is a valid alloction from a heap.
1473 * heap [I] Heap that block was allocated from
1474 * flags [I] HEAP_ flags from "winnt.h"
1475 * ptr [I] Block to check
1478 * Success: TRUE. The block was allocated from heap.
1479 * Failure: FALSE, if heap is invalid or ptr was not allocated from it.
1481 BOOLEAN WINAPI RtlValidateHeap( HANDLE heap, ULONG flags, LPCVOID ptr )
1483 HEAP *heapPtr = HEAP_GetPtr( heap );
1484 if (!heapPtr) return FALSE;
1485 return HEAP_IsRealArena( heapPtr, flags, ptr, QUIET );
1489 /***********************************************************************
1490 * RtlWalkHeap (NTDLL.@)
1493 * The PROCESS_HEAP_ENTRY flag values seem different between this
1494 * function and HeapWalk(). To be checked.
1496 NTSTATUS WINAPI RtlWalkHeap( HANDLE heap, PVOID entry_ptr )
1498 LPPROCESS_HEAP_ENTRY entry = entry_ptr; /* FIXME */
1499 HEAP *heapPtr = HEAP_GetPtr(heap);
1500 SUBHEAP *sub, *currentheap = NULL;
1503 int region_index = 0;
1505 FIXME( "not fully compatible\n" );
1507 if (!heapPtr || !entry) return STATUS_INVALID_PARAMETER;
1509 if (!(heapPtr->flags & HEAP_NO_SERIALIZE)) RtlEnterCriticalSection( &heapPtr->critSection );
1511 /* set ptr to the next arena to be examined */
1513 if (!entry->lpData) /* first call (init) ? */
1515 TRACE("begin walking of heap %p.\n", heap);
1516 currentheap = &heapPtr->subheap;
1517 ptr = (char*)currentheap + currentheap->headerSize;
1521 ptr = entry->lpData;
1522 sub = &heapPtr->subheap;
1525 if (((char *)ptr >= (char *)sub) &&
1526 ((char *)ptr < (char *)sub + sub->size))
1534 if (currentheap == NULL)
1536 ERR("no matching subheap found, shouldn't happen !\n");
1537 ret = STATUS_NO_MORE_ENTRIES;
1541 ptr += entry->cbData; /* point to next arena */
1542 if (ptr > (char *)currentheap + currentheap->size - 1)
1543 { /* proceed with next subheap */
1544 if (!(currentheap = currentheap->next))
1545 { /* successfully finished */
1546 TRACE("end reached.\n");
1547 ret = STATUS_NO_MORE_ENTRIES;
1550 ptr = (char*)currentheap + currentheap->headerSize;
1555 if (*(DWORD *)ptr & ARENA_FLAG_FREE)
1557 ARENA_FREE *pArena = (ARENA_FREE *)ptr;
1559 /*TRACE("free, magic: %04x\n", pArena->magic);*/
1561 entry->lpData = pArena + 1;
1562 entry->cbData = pArena->size & ARENA_SIZE_MASK;
1563 entry->cbOverhead = sizeof(ARENA_FREE);
1564 entry->wFlags = PROCESS_HEAP_UNCOMMITTED_RANGE;
1568 ARENA_INUSE *pArena = (ARENA_INUSE *)ptr;
1570 /*TRACE("busy, magic: %04x\n", pArena->magic);*/
1572 entry->lpData = pArena + 1;
1573 entry->cbData = pArena->size & ARENA_SIZE_MASK;
1574 entry->cbOverhead = sizeof(ARENA_INUSE);
1575 entry->wFlags = PROCESS_HEAP_ENTRY_BUSY;
1576 /* FIXME: can't handle PROCESS_HEAP_ENTRY_MOVEABLE
1577 and PROCESS_HEAP_ENTRY_DDESHARE yet */
1580 entry->iRegionIndex = region_index;
1582 /* first element of heap ? */
1583 if (ptr == (char *)(currentheap + currentheap->headerSize))
1585 entry->wFlags |= PROCESS_HEAP_REGION;
1586 entry->u.Region.dwCommittedSize = currentheap->commitSize;
1587 entry->u.Region.dwUnCommittedSize =
1588 currentheap->size - currentheap->commitSize;
1589 entry->u.Region.lpFirstBlock = /* first valid block */
1590 currentheap + currentheap->headerSize;
1591 entry->u.Region.lpLastBlock = /* first invalid block */
1592 currentheap + currentheap->size;
1594 ret = STATUS_SUCCESS;
1597 if (!(heapPtr->flags & HEAP_NO_SERIALIZE)) RtlLeaveCriticalSection( &heapPtr->critSection );
1602 /***********************************************************************
1603 * RtlGetProcessHeaps (NTDLL.@)
1605 * Get the Heaps belonging to the current process.
1608 * count [I] size of heaps
1609 * heaps [O] Destination array for heap HANDLE's
1612 * Success: The number of Heaps allocated by the process.
1615 ULONG WINAPI RtlGetProcessHeaps( ULONG count, HANDLE *heaps )
1620 if (!processHeap) return 0; /* should never happen */
1621 total = 1; /* main heap */
1622 RtlLockHeap( processHeap );
1623 for (ptr = firstHeap; ptr; ptr = ptr->next) total++;
1626 *heaps++ = (HANDLE)processHeap;
1627 for (ptr = firstHeap; ptr; ptr = ptr->next) *heaps++ = (HANDLE)ptr;
1629 RtlUnlockHeap( processHeap );