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1660 lines
54 KiB
C
1660 lines
54 KiB
C
/*
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* Win32 heap functions
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*
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* Copyright 1996 Alexandre Julliard
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* Copyright 1998 Ulrich Weigand
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "config.h"
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#include <assert.h>
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#include <stdlib.h>
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#include <stdarg.h>
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#include <stdio.h>
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#include <string.h>
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#ifdef HAVE_VALGRIND_MEMCHECK_H
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#include <valgrind/memcheck.h>
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#endif
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#define NONAMELESSUNION
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#define NONAMELESSSTRUCT
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#include "ntstatus.h"
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#define WIN32_NO_STATUS
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#include "windef.h"
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#include "winternl.h"
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#include "winnt.h"
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#include "winternl.h"
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#include "wine/list.h"
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#include "wine/debug.h"
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#include "wine/server.h"
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WINE_DEFAULT_DEBUG_CHANNEL(heap);
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/* Note: the heap data structures are based on what Pietrek describes in his
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* book 'Windows 95 System Programming Secrets'. The layout is not exactly
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* the same, but could be easily adapted if it turns out some programs
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* require it.
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*/
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/* FIXME: use SIZE_T for 'size' structure members, but we need to make sure
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* that there is no unaligned accesses to structure fields.
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*/
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typedef struct tagARENA_INUSE
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{
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DWORD size; /* Block size; must be the first field */
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DWORD magic : 24; /* Magic number */
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DWORD unused_bytes : 8; /* Number of bytes in the block not used by user data (max value is HEAP_MIN_DATA_SIZE+HEAP_MIN_SHRINK_SIZE) */
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} ARENA_INUSE;
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typedef struct tagARENA_FREE
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{
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DWORD size; /* Block size; must be the first field */
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DWORD magic; /* Magic number */
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struct list entry; /* Entry in free list */
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} ARENA_FREE;
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#define ARENA_FLAG_FREE 0x00000001 /* flags OR'ed with arena size */
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#define ARENA_FLAG_PREV_FREE 0x00000002
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#define ARENA_SIZE_MASK (~3)
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#define ARENA_INUSE_MAGIC 0x455355 /* Value for arena 'magic' field */
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#define ARENA_FREE_MAGIC 0x45455246 /* Value for arena 'magic' field */
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#define ARENA_INUSE_FILLER 0x55
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#define ARENA_FREE_FILLER 0xaa
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#define ALIGNMENT 8 /* everything is aligned on 8 byte boundaries */
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#define ROUND_SIZE(size) (((size) + ALIGNMENT - 1) & ~(ALIGNMENT-1))
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#define QUIET 1 /* Suppress messages */
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#define NOISY 0 /* Report all errors */
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/* minimum data size (without arenas) of an allocated block */
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#define HEAP_MIN_DATA_SIZE 16
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/* minimum size that must remain to shrink an allocated block */
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#define HEAP_MIN_SHRINK_SIZE (HEAP_MIN_DATA_SIZE+sizeof(ARENA_FREE))
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#define HEAP_NB_FREE_LISTS 4 /* Number of free lists */
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/* Max size of the blocks on the free lists */
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static const DWORD HEAP_freeListSizes[HEAP_NB_FREE_LISTS] =
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{
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0x20, 0x80, 0x200, ~0UL
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};
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typedef struct
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{
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ARENA_FREE arena;
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} FREE_LIST_ENTRY;
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struct tagHEAP;
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typedef struct tagSUBHEAP
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{
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DWORD size; /* Size of the whole sub-heap */
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DWORD commitSize; /* Committed size of the sub-heap */
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DWORD headerSize; /* Size of the heap header */
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struct tagSUBHEAP *next; /* Next sub-heap */
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struct tagHEAP *heap; /* Main heap structure */
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DWORD magic; /* Magic number */
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} SUBHEAP;
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#define SUBHEAP_MAGIC ((DWORD)('S' | ('U'<<8) | ('B'<<16) | ('H'<<24)))
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typedef struct tagHEAP
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{
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SUBHEAP subheap; /* First sub-heap */
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struct list entry; /* Entry in process heap list */
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RTL_CRITICAL_SECTION critSection; /* Critical section for serialization */
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FREE_LIST_ENTRY freeList[HEAP_NB_FREE_LISTS]; /* Free lists */
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DWORD flags; /* Heap flags */
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DWORD magic; /* Magic number */
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} HEAP;
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#define HEAP_MAGIC ((DWORD)('H' | ('E'<<8) | ('A'<<16) | ('P'<<24)))
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#define HEAP_DEF_SIZE 0x110000 /* Default heap size = 1Mb + 64Kb */
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#define COMMIT_MASK 0xffff /* bitmask for commit/decommit granularity */
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static HEAP *processHeap; /* main process heap */
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static BOOL HEAP_IsRealArena( HEAP *heapPtr, DWORD flags, LPCVOID block, BOOL quiet );
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/* mark a block of memory as free for debugging purposes */
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static inline void mark_block_free( void *ptr, SIZE_T size )
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{
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if (TRACE_ON(heap)) memset( ptr, ARENA_FREE_FILLER, size );
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#ifdef VALGRIND_MAKE_NOACCESS
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VALGRIND_DISCARD( VALGRIND_MAKE_NOACCESS( ptr, size ));
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#endif
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}
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/* mark a block of memory as initialized for debugging purposes */
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static inline void mark_block_initialized( void *ptr, SIZE_T size )
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{
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#ifdef VALGRIND_MAKE_READABLE
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VALGRIND_DISCARD( VALGRIND_MAKE_READABLE( ptr, size ));
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#endif
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}
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/* mark a block of memory as uninitialized for debugging purposes */
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static inline void mark_block_uninitialized( void *ptr, SIZE_T size )
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{
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#ifdef VALGRIND_MAKE_WRITABLE
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VALGRIND_DISCARD( VALGRIND_MAKE_WRITABLE( ptr, size ));
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#endif
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if (TRACE_ON(heap))
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{
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memset( ptr, ARENA_INUSE_FILLER, size );
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#ifdef VALGRIND_MAKE_WRITABLE
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/* make it uninitialized to valgrind again */
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VALGRIND_DISCARD( VALGRIND_MAKE_WRITABLE( ptr, size ));
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#endif
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}
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}
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/* clear contents of a block of memory */
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static inline void clear_block( void *ptr, SIZE_T size )
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{
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mark_block_initialized( ptr, size );
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memset( ptr, 0, size );
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}
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/* locate a free list entry of the appropriate size */
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/* size is the size of the whole block including the arena header */
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static inline unsigned int get_freelist_index( SIZE_T size )
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{
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unsigned int i;
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size -= sizeof(ARENA_FREE);
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for (i = 0; i < HEAP_NB_FREE_LISTS - 1; i++) if (size <= HEAP_freeListSizes[i]) break;
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return i;
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}
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static RTL_CRITICAL_SECTION_DEBUG process_heap_critsect_debug =
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{
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0, 0, NULL, /* will be set later */
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{ &process_heap_critsect_debug.ProcessLocksList, &process_heap_critsect_debug.ProcessLocksList },
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0, 0, { (DWORD_PTR)(__FILE__ ": main process heap section") }
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};
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/***********************************************************************
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* HEAP_Dump
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*/
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static void HEAP_Dump( HEAP *heap )
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{
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int i;
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SUBHEAP *subheap;
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char *ptr;
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DPRINTF( "Heap: %p\n", heap );
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DPRINTF( "Next: %p Sub-heaps: %p",
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LIST_ENTRY( heap->entry.next, HEAP, entry ), &heap->subheap );
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subheap = &heap->subheap;
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while (subheap->next)
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{
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DPRINTF( " -> %p", subheap->next );
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subheap = subheap->next;
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}
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DPRINTF( "\nFree lists:\n Block Stat Size Id\n" );
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for (i = 0; i < HEAP_NB_FREE_LISTS; i++)
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DPRINTF( "%p free %08lx prev=%p next=%p\n",
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&heap->freeList[i].arena, HEAP_freeListSizes[i],
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LIST_ENTRY( heap->freeList[i].arena.entry.prev, ARENA_FREE, entry ),
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LIST_ENTRY( heap->freeList[i].arena.entry.next, ARENA_FREE, entry ));
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subheap = &heap->subheap;
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while (subheap)
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{
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SIZE_T freeSize = 0, usedSize = 0, arenaSize = subheap->headerSize;
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DPRINTF( "\n\nSub-heap %p: size=%08lx committed=%08lx\n",
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subheap, subheap->size, subheap->commitSize );
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DPRINTF( "\n Block Stat Size Id\n" );
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ptr = (char*)subheap + subheap->headerSize;
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while (ptr < (char *)subheap + subheap->size)
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{
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if (*(DWORD *)ptr & ARENA_FLAG_FREE)
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{
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ARENA_FREE *pArena = (ARENA_FREE *)ptr;
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DPRINTF( "%p free %08lx prev=%p next=%p\n",
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pArena, pArena->size & ARENA_SIZE_MASK,
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LIST_ENTRY( pArena->entry.prev, ARENA_FREE, entry ),
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LIST_ENTRY( pArena->entry.next, ARENA_FREE, entry ) );
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ptr += sizeof(*pArena) + (pArena->size & ARENA_SIZE_MASK);
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arenaSize += sizeof(ARENA_FREE);
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freeSize += pArena->size & ARENA_SIZE_MASK;
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}
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else if (*(DWORD *)ptr & ARENA_FLAG_PREV_FREE)
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{
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ARENA_INUSE *pArena = (ARENA_INUSE *)ptr;
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DPRINTF( "%p Used %08lx back=%p\n",
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pArena, pArena->size & ARENA_SIZE_MASK, *((ARENA_FREE **)pArena - 1) );
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ptr += sizeof(*pArena) + (pArena->size & ARENA_SIZE_MASK);
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arenaSize += sizeof(ARENA_INUSE);
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usedSize += pArena->size & ARENA_SIZE_MASK;
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}
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else
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{
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ARENA_INUSE *pArena = (ARENA_INUSE *)ptr;
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DPRINTF( "%p used %08lx\n", pArena, pArena->size & ARENA_SIZE_MASK );
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ptr += sizeof(*pArena) + (pArena->size & ARENA_SIZE_MASK);
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arenaSize += sizeof(ARENA_INUSE);
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usedSize += pArena->size & ARENA_SIZE_MASK;
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}
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}
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DPRINTF( "\nTotal: Size=%08lx Committed=%08lx Free=%08lx Used=%08lx Arenas=%08lx (%ld%%)\n\n",
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subheap->size, subheap->commitSize, freeSize, usedSize,
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arenaSize, (arenaSize * 100) / subheap->size );
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subheap = subheap->next;
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}
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}
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static void HEAP_DumpEntry( LPPROCESS_HEAP_ENTRY entry )
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{
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WORD rem_flags;
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TRACE( "Dumping entry %p\n", entry );
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TRACE( "lpData\t\t: %p\n", entry->lpData );
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TRACE( "cbData\t\t: %08lx\n", entry->cbData);
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TRACE( "cbOverhead\t: %08x\n", entry->cbOverhead);
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TRACE( "iRegionIndex\t: %08x\n", entry->iRegionIndex);
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TRACE( "WFlags\t\t: ");
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if (entry->wFlags & PROCESS_HEAP_REGION)
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TRACE( "PROCESS_HEAP_REGION ");
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if (entry->wFlags & PROCESS_HEAP_UNCOMMITTED_RANGE)
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TRACE( "PROCESS_HEAP_UNCOMMITTED_RANGE ");
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if (entry->wFlags & PROCESS_HEAP_ENTRY_BUSY)
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TRACE( "PROCESS_HEAP_ENTRY_BUSY ");
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if (entry->wFlags & PROCESS_HEAP_ENTRY_MOVEABLE)
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TRACE( "PROCESS_HEAP_ENTRY_MOVEABLE ");
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if (entry->wFlags & PROCESS_HEAP_ENTRY_DDESHARE)
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TRACE( "PROCESS_HEAP_ENTRY_DDESHARE ");
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rem_flags = entry->wFlags &
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~(PROCESS_HEAP_REGION | PROCESS_HEAP_UNCOMMITTED_RANGE |
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PROCESS_HEAP_ENTRY_BUSY | PROCESS_HEAP_ENTRY_MOVEABLE|
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PROCESS_HEAP_ENTRY_DDESHARE);
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if (rem_flags)
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TRACE( "Unknown %08x", rem_flags);
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TRACE( "\n");
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if ((entry->wFlags & PROCESS_HEAP_ENTRY_BUSY )
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&& (entry->wFlags & PROCESS_HEAP_ENTRY_MOVEABLE))
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{
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/* Treat as block */
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TRACE( "BLOCK->hMem\t\t:%p\n", entry->u.Block.hMem);
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}
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if (entry->wFlags & PROCESS_HEAP_REGION)
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{
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TRACE( "Region.dwCommittedSize\t:%08lx\n",entry->u.Region.dwCommittedSize);
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TRACE( "Region.dwUnCommittedSize\t:%08lx\n",entry->u.Region.dwUnCommittedSize);
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TRACE( "Region.lpFirstBlock\t:%p\n",entry->u.Region.lpFirstBlock);
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TRACE( "Region.lpLastBlock\t:%p\n",entry->u.Region.lpLastBlock);
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}
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}
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/***********************************************************************
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* HEAP_GetPtr
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* RETURNS
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* Pointer to the heap
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* NULL: Failure
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*/
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static HEAP *HEAP_GetPtr(
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HANDLE heap /* [in] Handle to the heap */
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) {
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HEAP *heapPtr = (HEAP *)heap;
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if (!heapPtr || (heapPtr->magic != HEAP_MAGIC))
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{
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ERR("Invalid heap %p!\n", heap );
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return NULL;
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}
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if (TRACE_ON(heap) && !HEAP_IsRealArena( heapPtr, 0, NULL, NOISY ))
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{
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HEAP_Dump( heapPtr );
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assert( FALSE );
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return NULL;
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}
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return heapPtr;
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}
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/***********************************************************************
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* HEAP_InsertFreeBlock
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*
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* Insert a free block into the free list.
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*/
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static inline void HEAP_InsertFreeBlock( HEAP *heap, ARENA_FREE *pArena, BOOL last )
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{
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FREE_LIST_ENTRY *pEntry = heap->freeList + get_freelist_index( pArena->size + sizeof(*pArena) );
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if (last)
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{
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/* insert at end of free list, i.e. before the next free list entry */
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pEntry++;
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if (pEntry == &heap->freeList[HEAP_NB_FREE_LISTS]) pEntry = heap->freeList;
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list_add_before( &pEntry->arena.entry, &pArena->entry );
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}
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else
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{
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/* insert at head of free list */
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list_add_after( &pEntry->arena.entry, &pArena->entry );
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}
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pArena->size |= ARENA_FLAG_FREE;
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}
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/***********************************************************************
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* HEAP_FindSubHeap
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* Find the sub-heap containing a given address.
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*
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* RETURNS
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* Pointer: Success
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* NULL: Failure
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*/
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static SUBHEAP *HEAP_FindSubHeap(
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const HEAP *heap, /* [in] Heap pointer */
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LPCVOID ptr /* [in] Address */
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) {
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const SUBHEAP *sub = &heap->subheap;
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while (sub)
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{
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if (((const char *)ptr >= (const char *)sub) &&
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((const char *)ptr < (const char *)sub + sub->size)) return (SUBHEAP*)sub;
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sub = sub->next;
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}
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return NULL;
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}
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/***********************************************************************
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* HEAP_Commit
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*
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* Make sure the heap storage is committed for a given size in the specified arena.
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*/
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static inline BOOL HEAP_Commit( SUBHEAP *subheap, ARENA_INUSE *pArena, SIZE_T data_size )
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{
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void *ptr = (char *)(pArena + 1) + data_size + sizeof(ARENA_FREE);
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SIZE_T size = (char *)ptr - (char *)subheap;
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size = (size + COMMIT_MASK) & ~COMMIT_MASK;
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if (size > subheap->size) size = subheap->size;
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if (size <= subheap->commitSize) return TRUE;
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size -= subheap->commitSize;
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ptr = (char *)subheap + subheap->commitSize;
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if (NtAllocateVirtualMemory( NtCurrentProcess(), &ptr, 0,
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&size, MEM_COMMIT, PAGE_READWRITE ))
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{
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WARN("Could not commit %08lx bytes at %p for heap %p\n",
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size, ptr, subheap->heap );
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return FALSE;
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}
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subheap->commitSize += size;
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return TRUE;
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}
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/***********************************************************************
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* HEAP_Decommit
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*
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* If possible, decommit the heap storage from (including) 'ptr'.
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*/
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static inline BOOL HEAP_Decommit( SUBHEAP *subheap, void *ptr )
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{
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void *addr;
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SIZE_T decommit_size;
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SIZE_T size = (char *)ptr - (char *)subheap;
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/* round to next block and add one full block */
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size = ((size + COMMIT_MASK) & ~COMMIT_MASK) + COMMIT_MASK + 1;
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if (size >= subheap->commitSize) return TRUE;
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decommit_size = subheap->commitSize - size;
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addr = (char *)subheap + size;
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if (NtFreeVirtualMemory( NtCurrentProcess(), &addr, &decommit_size, MEM_DECOMMIT ))
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{
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WARN("Could not decommit %08lx bytes at %p for heap %p\n",
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decommit_size, (char *)subheap + size, subheap->heap );
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return FALSE;
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}
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subheap->commitSize -= decommit_size;
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return TRUE;
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}
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|
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/***********************************************************************
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* HEAP_CreateFreeBlock
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*
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* Create a free block at a specified address. 'size' is the size of the
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* whole block, including the new arena.
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*/
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static void HEAP_CreateFreeBlock( SUBHEAP *subheap, void *ptr, SIZE_T size )
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{
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ARENA_FREE *pFree;
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char *pEnd;
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BOOL last;
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/* Create a free arena */
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mark_block_uninitialized( ptr, sizeof( ARENA_FREE ) );
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pFree = (ARENA_FREE *)ptr;
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pFree->magic = ARENA_FREE_MAGIC;
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/* If debugging, erase the freed block content */
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pEnd = (char *)ptr + size;
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if (pEnd > (char *)subheap + subheap->commitSize) pEnd = (char *)subheap + subheap->commitSize;
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if (pEnd > (char *)(pFree + 1)) mark_block_free( pFree + 1, pEnd - (char *)(pFree + 1) );
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/* Check if next block is free also */
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if (((char *)ptr + size < (char *)subheap + subheap->size) &&
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(*(DWORD *)((char *)ptr + size) & ARENA_FLAG_FREE))
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{
|
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/* Remove the next arena from the free list */
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|
ARENA_FREE *pNext = (ARENA_FREE *)((char *)ptr + size);
|
|
list_remove( &pNext->entry );
|
|
size += (pNext->size & ARENA_SIZE_MASK) + sizeof(*pNext);
|
|
mark_block_free( pNext, sizeof(ARENA_FREE) );
|
|
}
|
|
|
|
/* Set the next block PREV_FREE flag and pointer */
|
|
|
|
last = ((char *)ptr + size >= (char *)subheap + subheap->size);
|
|
if (!last)
|
|
{
|
|
DWORD *pNext = (DWORD *)((char *)ptr + size);
|
|
*pNext |= ARENA_FLAG_PREV_FREE;
|
|
mark_block_initialized( pNext - 1, sizeof( ARENA_FREE * ) );
|
|
*((ARENA_FREE **)pNext - 1) = pFree;
|
|
}
|
|
|
|
/* Last, insert the new block into the free list */
|
|
|
|
pFree->size = size - sizeof(*pFree);
|
|
HEAP_InsertFreeBlock( subheap->heap, pFree, last );
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* HEAP_MakeInUseBlockFree
|
|
*
|
|
* Turn an in-use block into a free block. Can also decommit the end of
|
|
* the heap, and possibly even free the sub-heap altogether.
|
|
*/
|
|
static void HEAP_MakeInUseBlockFree( SUBHEAP *subheap, ARENA_INUSE *pArena )
|
|
{
|
|
ARENA_FREE *pFree;
|
|
SIZE_T size = (pArena->size & ARENA_SIZE_MASK) + sizeof(*pArena);
|
|
|
|
/* Check if we can merge with previous block */
|
|
|
|
if (pArena->size & ARENA_FLAG_PREV_FREE)
|
|
{
|
|
pFree = *((ARENA_FREE **)pArena - 1);
|
|
size += (pFree->size & ARENA_SIZE_MASK) + sizeof(ARENA_FREE);
|
|
/* Remove it from the free list */
|
|
list_remove( &pFree->entry );
|
|
}
|
|
else pFree = (ARENA_FREE *)pArena;
|
|
|
|
/* Create a free block */
|
|
|
|
HEAP_CreateFreeBlock( subheap, pFree, size );
|
|
size = (pFree->size & ARENA_SIZE_MASK) + sizeof(ARENA_FREE);
|
|
if ((char *)pFree + size < (char *)subheap + subheap->size)
|
|
return; /* Not the last block, so nothing more to do */
|
|
|
|
/* Free the whole sub-heap if it's empty and not the original one */
|
|
|
|
if (((char *)pFree == (char *)subheap + subheap->headerSize) &&
|
|
(subheap != &subheap->heap->subheap))
|
|
{
|
|
SIZE_T size = 0;
|
|
SUBHEAP *pPrev = &subheap->heap->subheap;
|
|
/* Remove the free block from the list */
|
|
list_remove( &pFree->entry );
|
|
/* Remove the subheap from the list */
|
|
while (pPrev && (pPrev->next != subheap)) pPrev = pPrev->next;
|
|
if (pPrev) pPrev->next = subheap->next;
|
|
/* Free the memory */
|
|
subheap->magic = 0;
|
|
NtFreeVirtualMemory( NtCurrentProcess(), (void **)&subheap, &size, MEM_RELEASE );
|
|
return;
|
|
}
|
|
|
|
/* Decommit the end of the heap */
|
|
|
|
if (!(subheap->heap->flags & HEAP_SHARED)) HEAP_Decommit( subheap, pFree + 1 );
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* HEAP_ShrinkBlock
|
|
*
|
|
* Shrink an in-use block.
|
|
*/
|
|
static void HEAP_ShrinkBlock(SUBHEAP *subheap, ARENA_INUSE *pArena, SIZE_T size)
|
|
{
|
|
if ((pArena->size & ARENA_SIZE_MASK) >= size + HEAP_MIN_SHRINK_SIZE)
|
|
{
|
|
HEAP_CreateFreeBlock( subheap, (char *)(pArena + 1) + size,
|
|
(pArena->size & ARENA_SIZE_MASK) - size );
|
|
/* assign size plus previous arena flags */
|
|
pArena->size = size | (pArena->size & ~ARENA_SIZE_MASK);
|
|
}
|
|
else
|
|
{
|
|
/* Turn off PREV_FREE flag in next block */
|
|
char *pNext = (char *)(pArena + 1) + (pArena->size & ARENA_SIZE_MASK);
|
|
if (pNext < (char *)subheap + subheap->size)
|
|
*(DWORD *)pNext &= ~ARENA_FLAG_PREV_FREE;
|
|
}
|
|
}
|
|
|
|
/***********************************************************************
|
|
* HEAP_InitSubHeap
|
|
*/
|
|
static BOOL HEAP_InitSubHeap( HEAP *heap, LPVOID address, DWORD flags,
|
|
SIZE_T commitSize, SIZE_T totalSize )
|
|
{
|
|
SUBHEAP *subheap;
|
|
FREE_LIST_ENTRY *pEntry;
|
|
int i;
|
|
|
|
/* Commit memory */
|
|
|
|
if (flags & HEAP_SHARED)
|
|
commitSize = totalSize; /* always commit everything in a shared heap */
|
|
if (NtAllocateVirtualMemory( NtCurrentProcess(), &address, 0,
|
|
&commitSize, MEM_COMMIT, PAGE_READWRITE ))
|
|
{
|
|
WARN("Could not commit %08lx bytes for sub-heap %p\n", commitSize, address );
|
|
return FALSE;
|
|
}
|
|
|
|
/* Fill the sub-heap structure */
|
|
|
|
subheap = (SUBHEAP *)address;
|
|
subheap->heap = heap;
|
|
subheap->size = totalSize;
|
|
subheap->commitSize = commitSize;
|
|
subheap->magic = SUBHEAP_MAGIC;
|
|
|
|
if ( subheap != (SUBHEAP *)heap )
|
|
{
|
|
/* If this is a secondary subheap, insert it into list */
|
|
|
|
subheap->headerSize = ROUND_SIZE( sizeof(SUBHEAP) );
|
|
subheap->next = heap->subheap.next;
|
|
heap->subheap.next = subheap;
|
|
}
|
|
else
|
|
{
|
|
/* If this is a primary subheap, initialize main heap */
|
|
|
|
subheap->headerSize = ROUND_SIZE( sizeof(HEAP) );
|
|
subheap->next = NULL;
|
|
heap->flags = flags;
|
|
heap->magic = HEAP_MAGIC;
|
|
|
|
/* Build the free lists */
|
|
|
|
list_init( &heap->freeList[0].arena.entry );
|
|
for (i = 0, pEntry = heap->freeList; i < HEAP_NB_FREE_LISTS; i++, pEntry++)
|
|
{
|
|
pEntry->arena.size = 0 | ARENA_FLAG_FREE;
|
|
pEntry->arena.magic = ARENA_FREE_MAGIC;
|
|
if (i) list_add_after( &pEntry[-1].arena.entry, &pEntry->arena.entry );
|
|
}
|
|
|
|
/* Initialize critical section */
|
|
|
|
if (!processHeap) /* do it by hand to avoid memory allocations */
|
|
{
|
|
heap->critSection.DebugInfo = &process_heap_critsect_debug;
|
|
heap->critSection.LockCount = -1;
|
|
heap->critSection.RecursionCount = 0;
|
|
heap->critSection.OwningThread = 0;
|
|
heap->critSection.LockSemaphore = 0;
|
|
heap->critSection.SpinCount = 0;
|
|
process_heap_critsect_debug.CriticalSection = &heap->critSection;
|
|
}
|
|
else RtlInitializeCriticalSection( &heap->critSection );
|
|
|
|
if (flags & HEAP_SHARED)
|
|
{
|
|
/* let's assume that only one thread at a time will try to do this */
|
|
HANDLE sem = heap->critSection.LockSemaphore;
|
|
if (!sem) NtCreateSemaphore( &sem, SEMAPHORE_ALL_ACCESS, NULL, 0, 1 );
|
|
|
|
NtDuplicateObject( NtCurrentProcess(), sem, NtCurrentProcess(), &sem, 0, 0,
|
|
DUP_HANDLE_MAKE_GLOBAL | DUP_HANDLE_SAME_ACCESS | DUP_HANDLE_CLOSE_SOURCE );
|
|
heap->critSection.LockSemaphore = sem;
|
|
}
|
|
}
|
|
|
|
/* Create the first free block */
|
|
|
|
HEAP_CreateFreeBlock( subheap, (LPBYTE)subheap + subheap->headerSize,
|
|
subheap->size - subheap->headerSize );
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/***********************************************************************
|
|
* HEAP_CreateSubHeap
|
|
*
|
|
* Create a sub-heap of the given size.
|
|
* If heap == NULL, creates a main heap.
|
|
*/
|
|
static SUBHEAP *HEAP_CreateSubHeap( HEAP *heap, void *base, DWORD flags,
|
|
SIZE_T commitSize, SIZE_T totalSize )
|
|
{
|
|
LPVOID address = base;
|
|
|
|
/* round-up sizes on a 64K boundary */
|
|
totalSize = (totalSize + 0xffff) & 0xffff0000;
|
|
commitSize = (commitSize + 0xffff) & 0xffff0000;
|
|
if (!commitSize) commitSize = 0x10000;
|
|
if (totalSize < commitSize) totalSize = commitSize;
|
|
|
|
if (!address)
|
|
{
|
|
/* allocate the memory block */
|
|
if (NtAllocateVirtualMemory( NtCurrentProcess(), &address, 0, &totalSize,
|
|
MEM_RESERVE, PAGE_READWRITE ))
|
|
{
|
|
WARN("Could not allocate %08lx bytes\n", totalSize );
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
/* Initialize subheap */
|
|
|
|
if (!HEAP_InitSubHeap( heap ? heap : (HEAP *)address,
|
|
address, flags, commitSize, totalSize ))
|
|
{
|
|
SIZE_T size = 0;
|
|
if (!base) NtFreeVirtualMemory( NtCurrentProcess(), &address, &size, MEM_RELEASE );
|
|
return NULL;
|
|
}
|
|
|
|
return (SUBHEAP *)address;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* HEAP_FindFreeBlock
|
|
*
|
|
* Find a free block at least as large as the requested size, and make sure
|
|
* the requested size is committed.
|
|
*/
|
|
static ARENA_FREE *HEAP_FindFreeBlock( HEAP *heap, SIZE_T size,
|
|
SUBHEAP **ppSubHeap )
|
|
{
|
|
SUBHEAP *subheap;
|
|
struct list *ptr;
|
|
FREE_LIST_ENTRY *pEntry = heap->freeList + get_freelist_index( size + sizeof(ARENA_INUSE) );
|
|
|
|
/* Find a suitable free list, and in it find a block large enough */
|
|
|
|
ptr = &pEntry->arena.entry;
|
|
while ((ptr = list_next( &heap->freeList[0].arena.entry, ptr )))
|
|
{
|
|
ARENA_FREE *pArena = LIST_ENTRY( ptr, ARENA_FREE, entry );
|
|
SIZE_T arena_size = (pArena->size & ARENA_SIZE_MASK) +
|
|
sizeof(ARENA_FREE) - sizeof(ARENA_INUSE);
|
|
if (arena_size >= size)
|
|
{
|
|
subheap = HEAP_FindSubHeap( heap, pArena );
|
|
if (!HEAP_Commit( subheap, (ARENA_INUSE *)pArena, size )) return NULL;
|
|
*ppSubHeap = subheap;
|
|
return pArena;
|
|
}
|
|
}
|
|
|
|
/* If no block was found, attempt to grow the heap */
|
|
|
|
if (!(heap->flags & HEAP_GROWABLE))
|
|
{
|
|
WARN("Not enough space in heap %p for %08lx bytes\n", heap, size );
|
|
return NULL;
|
|
}
|
|
/* make sure that we have a big enough size *committed* to fit another
|
|
* last free arena in !
|
|
* So just one heap struct, one first free arena which will eventually
|
|
* get used, and a second free arena that might get assigned all remaining
|
|
* free space in HEAP_ShrinkBlock() */
|
|
size += ROUND_SIZE(sizeof(SUBHEAP)) + sizeof(ARENA_INUSE) + sizeof(ARENA_FREE);
|
|
if (!(subheap = HEAP_CreateSubHeap( heap, NULL, heap->flags, size,
|
|
max( HEAP_DEF_SIZE, size ) )))
|
|
return NULL;
|
|
|
|
TRACE("created new sub-heap %p of %08lx bytes for heap %p\n",
|
|
subheap, size, heap );
|
|
|
|
*ppSubHeap = subheap;
|
|
return (ARENA_FREE *)(subheap + 1);
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* HEAP_IsValidArenaPtr
|
|
*
|
|
* Check that the pointer is inside the range possible for arenas.
|
|
*/
|
|
static BOOL HEAP_IsValidArenaPtr( const HEAP *heap, const void *ptr )
|
|
{
|
|
int i;
|
|
const SUBHEAP *subheap = HEAP_FindSubHeap( heap, ptr );
|
|
if (!subheap) return FALSE;
|
|
if ((const char *)ptr >= (const char *)subheap + subheap->headerSize) return TRUE;
|
|
if (subheap != &heap->subheap) return FALSE;
|
|
for (i = 0; i < HEAP_NB_FREE_LISTS; i++)
|
|
if (ptr == (const void *)&heap->freeList[i].arena) return TRUE;
|
|
return FALSE;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* HEAP_ValidateFreeArena
|
|
*/
|
|
static BOOL HEAP_ValidateFreeArena( SUBHEAP *subheap, ARENA_FREE *pArena )
|
|
{
|
|
ARENA_FREE *prev, *next;
|
|
char *heapEnd = (char *)subheap + subheap->size;
|
|
|
|
/* Check for unaligned pointers */
|
|
if ( (ULONG_PTR)pArena % ALIGNMENT != 0 )
|
|
{
|
|
ERR("Heap %p: unaligned arena pointer %p\n", subheap->heap, pArena );
|
|
return FALSE;
|
|
}
|
|
|
|
/* Check magic number */
|
|
if (pArena->magic != ARENA_FREE_MAGIC)
|
|
{
|
|
ERR("Heap %p: invalid free arena magic for %p\n", subheap->heap, pArena );
|
|
return FALSE;
|
|
}
|
|
/* Check size flags */
|
|
if (!(pArena->size & ARENA_FLAG_FREE) ||
|
|
(pArena->size & ARENA_FLAG_PREV_FREE))
|
|
{
|
|
ERR("Heap %p: bad flags %08lx for free arena %p\n",
|
|
subheap->heap, pArena->size & ~ARENA_SIZE_MASK, pArena );
|
|
return FALSE;
|
|
}
|
|
/* Check arena size */
|
|
if ((char *)(pArena + 1) + (pArena->size & ARENA_SIZE_MASK) > heapEnd)
|
|
{
|
|
ERR("Heap %p: bad size %08lx for free arena %p\n",
|
|
subheap->heap, pArena->size & ARENA_SIZE_MASK, pArena );
|
|
return FALSE;
|
|
}
|
|
/* Check that next pointer is valid */
|
|
next = LIST_ENTRY( pArena->entry.next, ARENA_FREE, entry );
|
|
if (!HEAP_IsValidArenaPtr( subheap->heap, next ))
|
|
{
|
|
ERR("Heap %p: bad next ptr %p for arena %p\n",
|
|
subheap->heap, next, pArena );
|
|
return FALSE;
|
|
}
|
|
/* Check that next arena is free */
|
|
if (!(next->size & ARENA_FLAG_FREE) || (next->magic != ARENA_FREE_MAGIC))
|
|
{
|
|
ERR("Heap %p: next arena %p invalid for %p\n",
|
|
subheap->heap, next, pArena );
|
|
return FALSE;
|
|
}
|
|
/* Check that prev pointer is valid */
|
|
prev = LIST_ENTRY( pArena->entry.prev, ARENA_FREE, entry );
|
|
if (!HEAP_IsValidArenaPtr( subheap->heap, prev ))
|
|
{
|
|
ERR("Heap %p: bad prev ptr %p for arena %p\n",
|
|
subheap->heap, prev, pArena );
|
|
return FALSE;
|
|
}
|
|
/* Check that prev arena is free */
|
|
if (!(prev->size & ARENA_FLAG_FREE) || (prev->magic != ARENA_FREE_MAGIC))
|
|
{
|
|
/* this often means that the prev arena got overwritten
|
|
* by a memory write before that prev arena */
|
|
ERR("Heap %p: prev arena %p invalid for %p\n",
|
|
subheap->heap, prev, pArena );
|
|
return FALSE;
|
|
}
|
|
/* Check that next block has PREV_FREE flag */
|
|
if ((char *)(pArena + 1) + (pArena->size & ARENA_SIZE_MASK) < heapEnd)
|
|
{
|
|
if (!(*(DWORD *)((char *)(pArena + 1) +
|
|
(pArena->size & ARENA_SIZE_MASK)) & ARENA_FLAG_PREV_FREE))
|
|
{
|
|
ERR("Heap %p: free arena %p next block has no PREV_FREE flag\n",
|
|
subheap->heap, pArena );
|
|
return FALSE;
|
|
}
|
|
/* Check next block back pointer */
|
|
if (*((ARENA_FREE **)((char *)(pArena + 1) +
|
|
(pArena->size & ARENA_SIZE_MASK)) - 1) != pArena)
|
|
{
|
|
ERR("Heap %p: arena %p has wrong back ptr %p\n",
|
|
subheap->heap, pArena,
|
|
*((ARENA_FREE **)((char *)(pArena+1) + (pArena->size & ARENA_SIZE_MASK)) - 1));
|
|
return FALSE;
|
|
}
|
|
}
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* HEAP_ValidateInUseArena
|
|
*/
|
|
static BOOL HEAP_ValidateInUseArena( const SUBHEAP *subheap, const ARENA_INUSE *pArena, BOOL quiet )
|
|
{
|
|
const char *heapEnd = (const char *)subheap + subheap->size;
|
|
|
|
/* Check for unaligned pointers */
|
|
if ( (ULONG_PTR)pArena % ALIGNMENT != 0 )
|
|
{
|
|
if ( quiet == NOISY )
|
|
{
|
|
ERR( "Heap %p: unaligned arena pointer %p\n", subheap->heap, pArena );
|
|
if ( TRACE_ON(heap) )
|
|
HEAP_Dump( subheap->heap );
|
|
}
|
|
else if ( WARN_ON(heap) )
|
|
{
|
|
WARN( "Heap %p: unaligned arena pointer %p\n", subheap->heap, pArena );
|
|
if ( TRACE_ON(heap) )
|
|
HEAP_Dump( subheap->heap );
|
|
}
|
|
return FALSE;
|
|
}
|
|
|
|
/* Check magic number */
|
|
if (pArena->magic != ARENA_INUSE_MAGIC)
|
|
{
|
|
if (quiet == NOISY) {
|
|
ERR("Heap %p: invalid in-use arena magic for %p\n", subheap->heap, pArena );
|
|
if (TRACE_ON(heap))
|
|
HEAP_Dump( subheap->heap );
|
|
} else if (WARN_ON(heap)) {
|
|
WARN("Heap %p: invalid in-use arena magic for %p\n", subheap->heap, pArena );
|
|
if (TRACE_ON(heap))
|
|
HEAP_Dump( subheap->heap );
|
|
}
|
|
return FALSE;
|
|
}
|
|
/* Check size flags */
|
|
if (pArena->size & ARENA_FLAG_FREE)
|
|
{
|
|
ERR("Heap %p: bad flags %08lx for in-use arena %p\n",
|
|
subheap->heap, pArena->size & ~ARENA_SIZE_MASK, pArena );
|
|
return FALSE;
|
|
}
|
|
/* Check arena size */
|
|
if ((const char *)(pArena + 1) + (pArena->size & ARENA_SIZE_MASK) > heapEnd)
|
|
{
|
|
ERR("Heap %p: bad size %08lx for in-use arena %p\n",
|
|
subheap->heap, pArena->size & ARENA_SIZE_MASK, pArena );
|
|
return FALSE;
|
|
}
|
|
/* Check next arena PREV_FREE flag */
|
|
if (((const char *)(pArena + 1) + (pArena->size & ARENA_SIZE_MASK) < heapEnd) &&
|
|
(*(const DWORD *)((const char *)(pArena + 1) + (pArena->size & ARENA_SIZE_MASK)) & ARENA_FLAG_PREV_FREE))
|
|
{
|
|
ERR("Heap %p: in-use arena %p next block has PREV_FREE flag\n",
|
|
subheap->heap, pArena );
|
|
return FALSE;
|
|
}
|
|
/* Check prev free arena */
|
|
if (pArena->size & ARENA_FLAG_PREV_FREE)
|
|
{
|
|
const ARENA_FREE *pPrev = *((const ARENA_FREE * const*)pArena - 1);
|
|
/* Check prev pointer */
|
|
if (!HEAP_IsValidArenaPtr( subheap->heap, pPrev ))
|
|
{
|
|
ERR("Heap %p: bad back ptr %p for arena %p\n",
|
|
subheap->heap, pPrev, pArena );
|
|
return FALSE;
|
|
}
|
|
/* Check that prev arena is free */
|
|
if (!(pPrev->size & ARENA_FLAG_FREE) ||
|
|
(pPrev->magic != ARENA_FREE_MAGIC))
|
|
{
|
|
ERR("Heap %p: prev arena %p invalid for in-use %p\n",
|
|
subheap->heap, pPrev, pArena );
|
|
return FALSE;
|
|
}
|
|
/* Check that prev arena is really the previous block */
|
|
if ((const char *)(pPrev + 1) + (pPrev->size & ARENA_SIZE_MASK) != (const char *)pArena)
|
|
{
|
|
ERR("Heap %p: prev arena %p is not prev for in-use %p\n",
|
|
subheap->heap, pPrev, pArena );
|
|
return FALSE;
|
|
}
|
|
}
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* HEAP_IsRealArena [Internal]
|
|
* Validates a block is a valid arena.
|
|
*
|
|
* RETURNS
|
|
* TRUE: Success
|
|
* FALSE: Failure
|
|
*/
|
|
static BOOL HEAP_IsRealArena( HEAP *heapPtr, /* [in] ptr to the heap */
|
|
DWORD flags, /* [in] Bit flags that control access during operation */
|
|
LPCVOID block, /* [in] Optional pointer to memory block to validate */
|
|
BOOL quiet ) /* [in] Flag - if true, HEAP_ValidateInUseArena
|
|
* does not complain */
|
|
{
|
|
SUBHEAP *subheap;
|
|
BOOL ret = TRUE;
|
|
|
|
if (!heapPtr || (heapPtr->magic != HEAP_MAGIC))
|
|
{
|
|
ERR("Invalid heap %p!\n", heapPtr );
|
|
return FALSE;
|
|
}
|
|
|
|
flags &= HEAP_NO_SERIALIZE;
|
|
flags |= heapPtr->flags;
|
|
/* calling HeapLock may result in infinite recursion, so do the critsect directly */
|
|
if (!(flags & HEAP_NO_SERIALIZE))
|
|
RtlEnterCriticalSection( &heapPtr->critSection );
|
|
|
|
if (block)
|
|
{
|
|
/* Only check this single memory block */
|
|
|
|
if (!(subheap = HEAP_FindSubHeap( heapPtr, block )) ||
|
|
((const char *)block < (char *)subheap + subheap->headerSize
|
|
+ sizeof(ARENA_INUSE)))
|
|
{
|
|
if (quiet == NOISY)
|
|
ERR("Heap %p: block %p is not inside heap\n", heapPtr, block );
|
|
else if (WARN_ON(heap))
|
|
WARN("Heap %p: block %p is not inside heap\n", heapPtr, block );
|
|
ret = FALSE;
|
|
} else
|
|
ret = HEAP_ValidateInUseArena( subheap, (const ARENA_INUSE *)block - 1, quiet );
|
|
|
|
if (!(flags & HEAP_NO_SERIALIZE))
|
|
RtlLeaveCriticalSection( &heapPtr->critSection );
|
|
return ret;
|
|
}
|
|
|
|
subheap = &heapPtr->subheap;
|
|
while (subheap && ret)
|
|
{
|
|
char *ptr = (char *)subheap + subheap->headerSize;
|
|
while (ptr < (char *)subheap + subheap->size)
|
|
{
|
|
if (*(DWORD *)ptr & ARENA_FLAG_FREE)
|
|
{
|
|
if (!HEAP_ValidateFreeArena( subheap, (ARENA_FREE *)ptr )) {
|
|
ret = FALSE;
|
|
break;
|
|
}
|
|
ptr += sizeof(ARENA_FREE) + (*(DWORD *)ptr & ARENA_SIZE_MASK);
|
|
}
|
|
else
|
|
{
|
|
if (!HEAP_ValidateInUseArena( subheap, (ARENA_INUSE *)ptr, NOISY )) {
|
|
ret = FALSE;
|
|
break;
|
|
}
|
|
ptr += sizeof(ARENA_INUSE) + (*(DWORD *)ptr & ARENA_SIZE_MASK);
|
|
}
|
|
}
|
|
subheap = subheap->next;
|
|
}
|
|
|
|
if (!(flags & HEAP_NO_SERIALIZE)) RtlLeaveCriticalSection( &heapPtr->critSection );
|
|
return ret;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* RtlCreateHeap (NTDLL.@)
|
|
*
|
|
* Create a new Heap.
|
|
*
|
|
* PARAMS
|
|
* flags [I] HEAP_ flags from "winnt.h"
|
|
* addr [I] Desired base address
|
|
* totalSize [I] Total size of the heap, or 0 for a growable heap
|
|
* commitSize [I] Amount of heap space to commit
|
|
* unknown [I] Not yet understood
|
|
* definition [I] Heap definition
|
|
*
|
|
* RETURNS
|
|
* Success: A HANDLE to the newly created heap.
|
|
* Failure: a NULL HANDLE.
|
|
*/
|
|
HANDLE WINAPI RtlCreateHeap( ULONG flags, PVOID addr, SIZE_T totalSize, SIZE_T commitSize,
|
|
PVOID unknown, PRTL_HEAP_DEFINITION definition )
|
|
{
|
|
SUBHEAP *subheap;
|
|
|
|
/* Allocate the heap block */
|
|
|
|
if (!totalSize)
|
|
{
|
|
totalSize = HEAP_DEF_SIZE;
|
|
flags |= HEAP_GROWABLE;
|
|
}
|
|
|
|
if (!(subheap = HEAP_CreateSubHeap( NULL, addr, flags, commitSize, totalSize ))) return 0;
|
|
|
|
/* link it into the per-process heap list */
|
|
if (processHeap)
|
|
{
|
|
HEAP *heapPtr = subheap->heap;
|
|
RtlEnterCriticalSection( &processHeap->critSection );
|
|
list_add_head( &processHeap->entry, &heapPtr->entry );
|
|
RtlLeaveCriticalSection( &processHeap->critSection );
|
|
}
|
|
else
|
|
{
|
|
processHeap = subheap->heap; /* assume the first heap we create is the process main heap */
|
|
list_init( &processHeap->entry );
|
|
}
|
|
|
|
return (HANDLE)subheap;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* RtlDestroyHeap (NTDLL.@)
|
|
*
|
|
* Destroy a Heap created with RtlCreateHeap().
|
|
*
|
|
* PARAMS
|
|
* heap [I] Heap to destroy.
|
|
*
|
|
* RETURNS
|
|
* Success: A NULL HANDLE, if heap is NULL or it was destroyed
|
|
* Failure: The Heap handle, if heap is the process heap.
|
|
*/
|
|
HANDLE WINAPI RtlDestroyHeap( HANDLE heap )
|
|
{
|
|
HEAP *heapPtr = HEAP_GetPtr( heap );
|
|
SUBHEAP *subheap;
|
|
|
|
TRACE("%p\n", heap );
|
|
if (!heapPtr) return heap;
|
|
|
|
if (heap == processHeap) return heap; /* cannot delete the main process heap */
|
|
|
|
/* remove it from the per-process list */
|
|
RtlEnterCriticalSection( &processHeap->critSection );
|
|
list_remove( &heapPtr->entry );
|
|
RtlLeaveCriticalSection( &processHeap->critSection );
|
|
|
|
RtlDeleteCriticalSection( &heapPtr->critSection );
|
|
subheap = &heapPtr->subheap;
|
|
while (subheap)
|
|
{
|
|
SUBHEAP *next = subheap->next;
|
|
SIZE_T size = 0;
|
|
void *addr = subheap;
|
|
NtFreeVirtualMemory( NtCurrentProcess(), &addr, &size, MEM_RELEASE );
|
|
subheap = next;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* RtlAllocateHeap (NTDLL.@)
|
|
*
|
|
* Allocate a memory block from a Heap.
|
|
*
|
|
* PARAMS
|
|
* heap [I] Heap to allocate block from
|
|
* flags [I] HEAP_ flags from "winnt.h"
|
|
* size [I] Size of the memory block to allocate
|
|
*
|
|
* RETURNS
|
|
* Success: A pointer to the newly allocated block
|
|
* Failure: NULL.
|
|
*
|
|
* NOTES
|
|
* This call does not SetLastError().
|
|
*/
|
|
PVOID WINAPI RtlAllocateHeap( HANDLE heap, ULONG flags, SIZE_T size )
|
|
{
|
|
ARENA_FREE *pArena;
|
|
ARENA_INUSE *pInUse;
|
|
SUBHEAP *subheap;
|
|
HEAP *heapPtr = HEAP_GetPtr( heap );
|
|
SIZE_T rounded_size;
|
|
|
|
/* Validate the parameters */
|
|
|
|
if (!heapPtr) return NULL;
|
|
flags &= HEAP_GENERATE_EXCEPTIONS | HEAP_NO_SERIALIZE | HEAP_ZERO_MEMORY;
|
|
flags |= heapPtr->flags;
|
|
rounded_size = ROUND_SIZE(size);
|
|
if (rounded_size < HEAP_MIN_DATA_SIZE) rounded_size = HEAP_MIN_DATA_SIZE;
|
|
|
|
if (!(flags & HEAP_NO_SERIALIZE)) RtlEnterCriticalSection( &heapPtr->critSection );
|
|
/* Locate a suitable free block */
|
|
|
|
if (!(pArena = HEAP_FindFreeBlock( heapPtr, rounded_size, &subheap )))
|
|
{
|
|
TRACE("(%p,%08lx,%08lx): returning NULL\n",
|
|
heap, flags, size );
|
|
if (!(flags & HEAP_NO_SERIALIZE)) RtlLeaveCriticalSection( &heapPtr->critSection );
|
|
if (flags & HEAP_GENERATE_EXCEPTIONS) RtlRaiseStatus( STATUS_NO_MEMORY );
|
|
return NULL;
|
|
}
|
|
|
|
/* Remove the arena from the free list */
|
|
|
|
list_remove( &pArena->entry );
|
|
|
|
/* Build the in-use arena */
|
|
|
|
pInUse = (ARENA_INUSE *)pArena;
|
|
|
|
/* in-use arena is smaller than free arena,
|
|
* so we have to add the difference to the size */
|
|
pInUse->size = (pInUse->size & ~ARENA_FLAG_FREE) + sizeof(ARENA_FREE) - sizeof(ARENA_INUSE);
|
|
pInUse->magic = ARENA_INUSE_MAGIC;
|
|
|
|
/* Shrink the block */
|
|
|
|
HEAP_ShrinkBlock( subheap, pInUse, rounded_size );
|
|
pInUse->unused_bytes = (pInUse->size & ARENA_SIZE_MASK) - size;
|
|
|
|
if (flags & HEAP_ZERO_MEMORY)
|
|
clear_block( pInUse + 1, pInUse->size & ARENA_SIZE_MASK );
|
|
else
|
|
mark_block_uninitialized( pInUse + 1, pInUse->size & ARENA_SIZE_MASK );
|
|
|
|
if (!(flags & HEAP_NO_SERIALIZE)) RtlLeaveCriticalSection( &heapPtr->critSection );
|
|
|
|
TRACE("(%p,%08lx,%08lx): returning %p\n", heap, flags, size, pInUse + 1 );
|
|
return (LPVOID)(pInUse + 1);
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* RtlFreeHeap (NTDLL.@)
|
|
*
|
|
* Free a memory block allocated with RtlAllocateHeap().
|
|
*
|
|
* PARAMS
|
|
* heap [I] Heap that block was allocated from
|
|
* flags [I] HEAP_ flags from "winnt.h"
|
|
* ptr [I] Block to free
|
|
*
|
|
* RETURNS
|
|
* Success: TRUE, if ptr is NULL or was freed successfully.
|
|
* Failure: FALSE.
|
|
*/
|
|
BOOLEAN WINAPI RtlFreeHeap( HANDLE heap, ULONG flags, PVOID ptr )
|
|
{
|
|
ARENA_INUSE *pInUse;
|
|
SUBHEAP *subheap;
|
|
HEAP *heapPtr;
|
|
|
|
/* Validate the parameters */
|
|
|
|
if (!ptr) return TRUE; /* freeing a NULL ptr isn't an error in Win2k */
|
|
|
|
heapPtr = HEAP_GetPtr( heap );
|
|
if (!heapPtr)
|
|
{
|
|
RtlSetLastWin32ErrorAndNtStatusFromNtStatus( STATUS_INVALID_HANDLE );
|
|
return FALSE;
|
|
}
|
|
|
|
flags &= HEAP_NO_SERIALIZE;
|
|
flags |= heapPtr->flags;
|
|
if (!(flags & HEAP_NO_SERIALIZE)) RtlEnterCriticalSection( &heapPtr->critSection );
|
|
if (!HEAP_IsRealArena( heapPtr, HEAP_NO_SERIALIZE, ptr, QUIET ))
|
|
{
|
|
if (!(flags & HEAP_NO_SERIALIZE)) RtlLeaveCriticalSection( &heapPtr->critSection );
|
|
RtlSetLastWin32ErrorAndNtStatusFromNtStatus( STATUS_INVALID_PARAMETER );
|
|
TRACE("(%p,%08lx,%p): returning FALSE\n", heap, flags, ptr );
|
|
return FALSE;
|
|
}
|
|
|
|
/* Turn the block into a free block */
|
|
|
|
pInUse = (ARENA_INUSE *)ptr - 1;
|
|
subheap = HEAP_FindSubHeap( heapPtr, pInUse );
|
|
HEAP_MakeInUseBlockFree( subheap, pInUse );
|
|
|
|
if (!(flags & HEAP_NO_SERIALIZE)) RtlLeaveCriticalSection( &heapPtr->critSection );
|
|
|
|
TRACE("(%p,%08lx,%p): returning TRUE\n", heap, flags, ptr );
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* RtlReAllocateHeap (NTDLL.@)
|
|
*
|
|
* Change the size of a memory block allocated with RtlAllocateHeap().
|
|
*
|
|
* PARAMS
|
|
* heap [I] Heap that block was allocated from
|
|
* flags [I] HEAP_ flags from "winnt.h"
|
|
* ptr [I] Block to resize
|
|
* size [I] Size of the memory block to allocate
|
|
*
|
|
* RETURNS
|
|
* Success: A pointer to the resized block (which may be different).
|
|
* Failure: NULL.
|
|
*/
|
|
PVOID WINAPI RtlReAllocateHeap( HANDLE heap, ULONG flags, PVOID ptr, SIZE_T size )
|
|
{
|
|
ARENA_INUSE *pArena;
|
|
HEAP *heapPtr;
|
|
SUBHEAP *subheap;
|
|
SIZE_T oldSize, rounded_size;
|
|
|
|
if (!ptr) return NULL;
|
|
if (!(heapPtr = HEAP_GetPtr( heap )))
|
|
{
|
|
RtlSetLastWin32ErrorAndNtStatusFromNtStatus( STATUS_INVALID_HANDLE );
|
|
return NULL;
|
|
}
|
|
|
|
/* Validate the parameters */
|
|
|
|
flags &= HEAP_GENERATE_EXCEPTIONS | HEAP_NO_SERIALIZE | HEAP_ZERO_MEMORY |
|
|
HEAP_REALLOC_IN_PLACE_ONLY;
|
|
flags |= heapPtr->flags;
|
|
rounded_size = ROUND_SIZE(size);
|
|
if (rounded_size < HEAP_MIN_DATA_SIZE) rounded_size = HEAP_MIN_DATA_SIZE;
|
|
|
|
if (!(flags & HEAP_NO_SERIALIZE)) RtlEnterCriticalSection( &heapPtr->critSection );
|
|
if (!HEAP_IsRealArena( heapPtr, HEAP_NO_SERIALIZE, ptr, QUIET ))
|
|
{
|
|
if (!(flags & HEAP_NO_SERIALIZE)) RtlLeaveCriticalSection( &heapPtr->critSection );
|
|
RtlSetLastWin32ErrorAndNtStatusFromNtStatus( STATUS_INVALID_PARAMETER );
|
|
TRACE("(%p,%08lx,%p,%08lx): returning NULL\n", heap, flags, ptr, size );
|
|
return NULL;
|
|
}
|
|
|
|
/* Check if we need to grow the block */
|
|
|
|
pArena = (ARENA_INUSE *)ptr - 1;
|
|
subheap = HEAP_FindSubHeap( heapPtr, pArena );
|
|
oldSize = (pArena->size & ARENA_SIZE_MASK);
|
|
if (rounded_size > oldSize)
|
|
{
|
|
char *pNext = (char *)(pArena + 1) + oldSize;
|
|
if ((pNext < (char *)subheap + subheap->size) &&
|
|
(*(DWORD *)pNext & ARENA_FLAG_FREE) &&
|
|
(oldSize + (*(DWORD *)pNext & ARENA_SIZE_MASK) + sizeof(ARENA_FREE) >= rounded_size))
|
|
{
|
|
/* The next block is free and large enough */
|
|
ARENA_FREE *pFree = (ARENA_FREE *)pNext;
|
|
list_remove( &pFree->entry );
|
|
pArena->size += (pFree->size & ARENA_SIZE_MASK) + sizeof(*pFree);
|
|
if (!HEAP_Commit( subheap, pArena, rounded_size ))
|
|
{
|
|
if (!(flags & HEAP_NO_SERIALIZE)) RtlLeaveCriticalSection( &heapPtr->critSection );
|
|
if (flags & HEAP_GENERATE_EXCEPTIONS) RtlRaiseStatus( STATUS_NO_MEMORY );
|
|
RtlSetLastWin32ErrorAndNtStatusFromNtStatus( STATUS_NO_MEMORY );
|
|
return NULL;
|
|
}
|
|
HEAP_ShrinkBlock( subheap, pArena, rounded_size );
|
|
}
|
|
else /* Do it the hard way */
|
|
{
|
|
ARENA_FREE *pNew;
|
|
ARENA_INUSE *pInUse;
|
|
SUBHEAP *newsubheap;
|
|
|
|
if ((flags & HEAP_REALLOC_IN_PLACE_ONLY) ||
|
|
!(pNew = HEAP_FindFreeBlock( heapPtr, rounded_size, &newsubheap )))
|
|
{
|
|
if (!(flags & HEAP_NO_SERIALIZE)) RtlLeaveCriticalSection( &heapPtr->critSection );
|
|
if (flags & HEAP_GENERATE_EXCEPTIONS) RtlRaiseStatus( STATUS_NO_MEMORY );
|
|
RtlSetLastWin32ErrorAndNtStatusFromNtStatus( STATUS_NO_MEMORY );
|
|
return NULL;
|
|
}
|
|
|
|
/* Build the in-use arena */
|
|
|
|
list_remove( &pNew->entry );
|
|
pInUse = (ARENA_INUSE *)pNew;
|
|
pInUse->size = (pInUse->size & ~ARENA_FLAG_FREE)
|
|
+ sizeof(ARENA_FREE) - sizeof(ARENA_INUSE);
|
|
pInUse->magic = ARENA_INUSE_MAGIC;
|
|
HEAP_ShrinkBlock( newsubheap, pInUse, rounded_size );
|
|
mark_block_initialized( pInUse + 1, oldSize );
|
|
memcpy( pInUse + 1, pArena + 1, oldSize );
|
|
|
|
/* Free the previous block */
|
|
|
|
HEAP_MakeInUseBlockFree( subheap, pArena );
|
|
subheap = newsubheap;
|
|
pArena = pInUse;
|
|
}
|
|
}
|
|
else HEAP_ShrinkBlock( subheap, pArena, rounded_size ); /* Shrink the block */
|
|
|
|
pArena->unused_bytes = (pArena->size & ARENA_SIZE_MASK) - size;
|
|
|
|
/* Clear the extra bytes if needed */
|
|
|
|
if (rounded_size > oldSize)
|
|
{
|
|
if (flags & HEAP_ZERO_MEMORY)
|
|
clear_block( (char *)(pArena + 1) + oldSize,
|
|
(pArena->size & ARENA_SIZE_MASK) - oldSize );
|
|
else
|
|
mark_block_uninitialized( (char *)(pArena + 1) + oldSize,
|
|
(pArena->size & ARENA_SIZE_MASK) - oldSize );
|
|
}
|
|
|
|
/* Return the new arena */
|
|
|
|
if (!(flags & HEAP_NO_SERIALIZE)) RtlLeaveCriticalSection( &heapPtr->critSection );
|
|
|
|
TRACE("(%p,%08lx,%p,%08lx): returning %p\n", heap, flags, ptr, size, pArena + 1 );
|
|
return (LPVOID)(pArena + 1);
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* RtlCompactHeap (NTDLL.@)
|
|
*
|
|
* Compact the free space in a Heap.
|
|
*
|
|
* PARAMS
|
|
* heap [I] Heap that block was allocated from
|
|
* flags [I] HEAP_ flags from "winnt.h"
|
|
*
|
|
* RETURNS
|
|
* The number of bytes compacted.
|
|
*
|
|
* NOTES
|
|
* This function is a harmless stub.
|
|
*/
|
|
ULONG WINAPI RtlCompactHeap( HANDLE heap, ULONG flags )
|
|
{
|
|
FIXME( "stub\n" );
|
|
return 0;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* RtlLockHeap (NTDLL.@)
|
|
*
|
|
* Lock a Heap.
|
|
*
|
|
* PARAMS
|
|
* heap [I] Heap to lock
|
|
*
|
|
* RETURNS
|
|
* Success: TRUE. The Heap is locked.
|
|
* Failure: FALSE, if heap is invalid.
|
|
*/
|
|
BOOLEAN WINAPI RtlLockHeap( HANDLE heap )
|
|
{
|
|
HEAP *heapPtr = HEAP_GetPtr( heap );
|
|
if (!heapPtr) return FALSE;
|
|
RtlEnterCriticalSection( &heapPtr->critSection );
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* RtlUnlockHeap (NTDLL.@)
|
|
*
|
|
* Unlock a Heap.
|
|
*
|
|
* PARAMS
|
|
* heap [I] Heap to unlock
|
|
*
|
|
* RETURNS
|
|
* Success: TRUE. The Heap is unlocked.
|
|
* Failure: FALSE, if heap is invalid.
|
|
*/
|
|
BOOLEAN WINAPI RtlUnlockHeap( HANDLE heap )
|
|
{
|
|
HEAP *heapPtr = HEAP_GetPtr( heap );
|
|
if (!heapPtr) return FALSE;
|
|
RtlLeaveCriticalSection( &heapPtr->critSection );
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* RtlSizeHeap (NTDLL.@)
|
|
*
|
|
* Get the actual size of a memory block allocated from a Heap.
|
|
*
|
|
* PARAMS
|
|
* heap [I] Heap that block was allocated from
|
|
* flags [I] HEAP_ flags from "winnt.h"
|
|
* ptr [I] Block to get the size of
|
|
*
|
|
* RETURNS
|
|
* Success: The size of the block.
|
|
* Failure: -1, heap or ptr are invalid.
|
|
*
|
|
* NOTES
|
|
* The size may be bigger than what was passed to RtlAllocateHeap().
|
|
*/
|
|
SIZE_T WINAPI RtlSizeHeap( HANDLE heap, ULONG flags, PVOID ptr )
|
|
{
|
|
SIZE_T ret;
|
|
HEAP *heapPtr = HEAP_GetPtr( heap );
|
|
|
|
if (!heapPtr)
|
|
{
|
|
RtlSetLastWin32ErrorAndNtStatusFromNtStatus( STATUS_INVALID_HANDLE );
|
|
return ~0UL;
|
|
}
|
|
flags &= HEAP_NO_SERIALIZE;
|
|
flags |= heapPtr->flags;
|
|
if (!(flags & HEAP_NO_SERIALIZE)) RtlEnterCriticalSection( &heapPtr->critSection );
|
|
if (!HEAP_IsRealArena( heapPtr, HEAP_NO_SERIALIZE, ptr, QUIET ))
|
|
{
|
|
RtlSetLastWin32ErrorAndNtStatusFromNtStatus( STATUS_INVALID_PARAMETER );
|
|
ret = ~0UL;
|
|
}
|
|
else
|
|
{
|
|
ARENA_INUSE *pArena = (ARENA_INUSE *)ptr - 1;
|
|
ret = (pArena->size & ARENA_SIZE_MASK) - pArena->unused_bytes;
|
|
}
|
|
if (!(flags & HEAP_NO_SERIALIZE)) RtlLeaveCriticalSection( &heapPtr->critSection );
|
|
|
|
TRACE("(%p,%08lx,%p): returning %08lx\n", heap, flags, ptr, ret );
|
|
return ret;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* RtlValidateHeap (NTDLL.@)
|
|
*
|
|
* Determine if a block is a valid allocation from a heap.
|
|
*
|
|
* PARAMS
|
|
* heap [I] Heap that block was allocated from
|
|
* flags [I] HEAP_ flags from "winnt.h"
|
|
* ptr [I] Block to check
|
|
*
|
|
* RETURNS
|
|
* Success: TRUE. The block was allocated from heap.
|
|
* Failure: FALSE, if heap is invalid or ptr was not allocated from it.
|
|
*/
|
|
BOOLEAN WINAPI RtlValidateHeap( HANDLE heap, ULONG flags, LPCVOID ptr )
|
|
{
|
|
HEAP *heapPtr = HEAP_GetPtr( heap );
|
|
if (!heapPtr) return FALSE;
|
|
return HEAP_IsRealArena( heapPtr, flags, ptr, QUIET );
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* RtlWalkHeap (NTDLL.@)
|
|
*
|
|
* FIXME
|
|
* The PROCESS_HEAP_ENTRY flag values seem different between this
|
|
* function and HeapWalk(). To be checked.
|
|
*/
|
|
NTSTATUS WINAPI RtlWalkHeap( HANDLE heap, PVOID entry_ptr )
|
|
{
|
|
LPPROCESS_HEAP_ENTRY entry = entry_ptr; /* FIXME */
|
|
HEAP *heapPtr = HEAP_GetPtr(heap);
|
|
SUBHEAP *sub, *currentheap = NULL;
|
|
NTSTATUS ret;
|
|
char *ptr;
|
|
int region_index = 0;
|
|
|
|
if (!heapPtr || !entry) return STATUS_INVALID_PARAMETER;
|
|
|
|
if (!(heapPtr->flags & HEAP_NO_SERIALIZE)) RtlEnterCriticalSection( &heapPtr->critSection );
|
|
|
|
/* set ptr to the next arena to be examined */
|
|
|
|
if (!entry->lpData) /* first call (init) ? */
|
|
{
|
|
TRACE("begin walking of heap %p.\n", heap);
|
|
currentheap = &heapPtr->subheap;
|
|
ptr = (char*)currentheap + currentheap->headerSize;
|
|
}
|
|
else
|
|
{
|
|
ptr = entry->lpData;
|
|
sub = &heapPtr->subheap;
|
|
while (sub)
|
|
{
|
|
if (((char *)ptr >= (char *)sub) &&
|
|
((char *)ptr < (char *)sub + sub->size))
|
|
{
|
|
currentheap = sub;
|
|
break;
|
|
}
|
|
sub = sub->next;
|
|
region_index++;
|
|
}
|
|
if (currentheap == NULL)
|
|
{
|
|
ERR("no matching subheap found, shouldn't happen !\n");
|
|
ret = STATUS_NO_MORE_ENTRIES;
|
|
goto HW_end;
|
|
}
|
|
|
|
ptr += entry->cbData; /* point to next arena */
|
|
if (ptr > (char *)currentheap + currentheap->size - 1)
|
|
{ /* proceed with next subheap */
|
|
if (!(currentheap = currentheap->next))
|
|
{ /* successfully finished */
|
|
TRACE("end reached.\n");
|
|
ret = STATUS_NO_MORE_ENTRIES;
|
|
goto HW_end;
|
|
}
|
|
ptr = (char*)currentheap + currentheap->headerSize;
|
|
}
|
|
}
|
|
|
|
entry->wFlags = 0;
|
|
if (*(DWORD *)ptr & ARENA_FLAG_FREE)
|
|
{
|
|
ARENA_FREE *pArena = (ARENA_FREE *)ptr;
|
|
|
|
/*TRACE("free, magic: %04x\n", pArena->magic);*/
|
|
|
|
entry->lpData = pArena + 1;
|
|
entry->cbData = pArena->size & ARENA_SIZE_MASK;
|
|
entry->cbOverhead = sizeof(ARENA_FREE);
|
|
entry->wFlags = PROCESS_HEAP_UNCOMMITTED_RANGE;
|
|
}
|
|
else
|
|
{
|
|
ARENA_INUSE *pArena = (ARENA_INUSE *)ptr;
|
|
|
|
/*TRACE("busy, magic: %04x\n", pArena->magic);*/
|
|
|
|
entry->lpData = pArena + 1;
|
|
entry->cbData = pArena->size & ARENA_SIZE_MASK;
|
|
entry->cbOverhead = sizeof(ARENA_INUSE);
|
|
entry->wFlags = PROCESS_HEAP_ENTRY_BUSY;
|
|
/* FIXME: can't handle PROCESS_HEAP_ENTRY_MOVEABLE
|
|
and PROCESS_HEAP_ENTRY_DDESHARE yet */
|
|
}
|
|
|
|
entry->iRegionIndex = region_index;
|
|
|
|
/* first element of heap ? */
|
|
if (ptr == (char *)(currentheap + currentheap->headerSize))
|
|
{
|
|
entry->wFlags |= PROCESS_HEAP_REGION;
|
|
entry->u.Region.dwCommittedSize = currentheap->commitSize;
|
|
entry->u.Region.dwUnCommittedSize =
|
|
currentheap->size - currentheap->commitSize;
|
|
entry->u.Region.lpFirstBlock = /* first valid block */
|
|
currentheap + currentheap->headerSize;
|
|
entry->u.Region.lpLastBlock = /* first invalid block */
|
|
currentheap + currentheap->size;
|
|
}
|
|
ret = STATUS_SUCCESS;
|
|
if (TRACE_ON(heap)) HEAP_DumpEntry(entry);
|
|
|
|
HW_end:
|
|
if (!(heapPtr->flags & HEAP_NO_SERIALIZE)) RtlLeaveCriticalSection( &heapPtr->critSection );
|
|
return ret;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* RtlGetProcessHeaps (NTDLL.@)
|
|
*
|
|
* Get the Heaps belonging to the current process.
|
|
*
|
|
* PARAMS
|
|
* count [I] size of heaps
|
|
* heaps [O] Destination array for heap HANDLE's
|
|
*
|
|
* RETURNS
|
|
* Success: The number of Heaps allocated by the process.
|
|
* Failure: 0.
|
|
*/
|
|
ULONG WINAPI RtlGetProcessHeaps( ULONG count, HANDLE *heaps )
|
|
{
|
|
ULONG total = 1; /* main heap */
|
|
struct list *ptr;
|
|
|
|
RtlEnterCriticalSection( &processHeap->critSection );
|
|
LIST_FOR_EACH( ptr, &processHeap->entry ) total++;
|
|
if (total <= count)
|
|
{
|
|
*heaps++ = processHeap;
|
|
LIST_FOR_EACH( ptr, &processHeap->entry )
|
|
*heaps++ = LIST_ENTRY( ptr, HEAP, entry );
|
|
}
|
|
RtlLeaveCriticalSection( &processHeap->critSection );
|
|
return total;
|
|
}
|