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reactos/reactos/lib/ntdll/rtl/heap.c
Gé van Geldorp d842500eb1 Always return 8-byte aligned blocks 
svn path=/trunk/; revision=8226
2004-02-17 21:11:17 +00:00

1686 lines
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/*
* Win32 heap functions
*
* Copyright 1996 Alexandre Julliard
* Copyright 1998 Ulrich Weigand
*/
/* Note: the heap data structures are based on what Pietrek describes in his
* book 'Windows 95 System Programming Secrets'. The layout is not exactly
* the same, but could be easily adapted if it turns out some programs
* require it.
*/
#include <string.h>
#include <ddk/ntddk.h>
#include <ntdll/rtl.h>
#include <ntos/heap.h>
#include <ntos/minmax.h>
#define NDEBUG
#include <ntdll/ntdll.h>
#define DPRINTF DPRINT
#define ERR DPRINT
#define SetLastError(x)
#define WARN DPRINT
#define TRACE DPRINT
#define WARN_ON(x) (1)
#undef assert
#ifdef NDEBUG
#define TRACE_ON(x) (0)
#define assert(x)
#else
#define TRACE_ON(x) (1)
#define assert(x)
#endif
static CRITICAL_SECTION RtlpProcessHeapsListLock;
typedef struct tagARENA_INUSE
{
DWORD size; /* Block size; must be the first field */
WORD threadId; /* Allocating thread id */
WORD magic; /* Magic number */
} ARENA_INUSE;
typedef struct tagARENA_FREE
{
DWORD size; /* Block size; must be the first field */
WORD threadId; /* Freeing thread id */
WORD magic; /* Magic number */
struct tagARENA_FREE *next; /* Next free arena */
struct tagARENA_FREE *prev; /* Prev free arena */
} ARENA_FREE;
#define ARENA_FLAG_FREE 0x00000001 /* flags OR'ed with arena size */
#define ARENA_FLAG_PREV_FREE 0x00000002
#define ARENA_SIZE_MASK 0xfffffffc
#define ARENA_INUSE_MAGIC 0x4842 /* Value for arena 'magic' field */
#define ARENA_FREE_MAGIC 0x4846 /* Value for arena 'magic' field */
#define ARENA_INUSE_FILLER 0x55
#define ARENA_FREE_FILLER 0xaa
#define QUIET 1 /* Suppress messages */
#define NOISY 0 /* Report all errors */
#define HEAP_NB_FREE_LISTS 4 /* Number of free lists */
/* Max size of the blocks on the free lists */
static const DWORD HEAP_freeListSizes[HEAP_NB_FREE_LISTS] =
{
0x20, 0x80, 0x200, 0xffffffff
};
typedef struct
{
DWORD size;
ARENA_FREE arena;
} FREE_LIST_ENTRY;
struct tagHEAP;
typedef struct tagSUBHEAP
{
DWORD size; /* Size of the whole sub-heap */
DWORD commitSize; /* Committed size of the sub-heap */
DWORD headerSize; /* Size of the heap header */
struct tagSUBHEAP *next; /* Next sub-heap */
struct tagHEAP *heap; /* Main heap structure */
DWORD magic; /* Magic number */
} SUBHEAP, *PSUBHEAP;
#define SUBHEAP_MAGIC ((DWORD)('S' | ('U'<<8) | ('B'<<16) | ('H'<<24)))
typedef struct tagHEAP
{
SUBHEAP subheap; /* First sub-heap */
struct tagHEAP *next; /* Next heap for this process */
FREE_LIST_ENTRY freeList[HEAP_NB_FREE_LISTS]; /* Free lists */
CRITICAL_SECTION critSection; /* Critical section for serialization */
DWORD flags; /* Heap flags */
DWORD magic; /* Magic number */
BYTE filler[4]; /* Make multiple of 8 bytes */
} HEAP, *PHEAP;
#define HEAP_MAGIC ((DWORD)('H' | ('E'<<8) | ('A'<<16) | ('P'<<24)))
#define HEAP_DEF_SIZE 0x110000 /* Default heap size = 1Mb + 64Kb */
#define HEAP_MIN_BLOCK_SIZE (sizeof(ARENA_FREE) + 8) /* Min. heap block size */
#define COMMIT_MASK 0xffff /* bitmask for commit/decommit granularity */
static BOOL HEAP_IsRealArena( HANDLE heap, DWORD flags, LPCVOID block, BOOL quiet );
/***********************************************************************
* HEAP_Dump
*/
void
HEAP_Dump(PHEAP heap)
{
int i;
SUBHEAP *subheap;
char *ptr;
DPRINTF( "Heap: %08lx\n", (DWORD)heap );
DPRINTF( "Next: %08lx Sub-heaps: %08lx",
(DWORD)heap->next, (DWORD)&heap->subheap );
subheap = &heap->subheap;
while (subheap->next)
{
DPRINTF( " -> %08lx", (DWORD)subheap->next );
subheap = subheap->next;
}
DPRINTF( "\nFree lists:\n Block Stat Size Id\n" );
for (i = 0; i < HEAP_NB_FREE_LISTS; i++)
DPRINTF( "%08lx free %08lx %04x prev=%08lx next=%08lx\n",
(DWORD)&heap->freeList[i].arena, heap->freeList[i].arena.size,
heap->freeList[i].arena.threadId,
(DWORD)heap->freeList[i].arena.prev,
(DWORD)heap->freeList[i].arena.next );
subheap = &heap->subheap;
while (subheap)
{
DWORD freeSize = 0, usedSize = 0, arenaSize = subheap->headerSize;
DPRINTF( "\n\nSub-heap %08lx: size=%08lx committed=%08lx\n",
(DWORD)subheap, subheap->size, subheap->commitSize );
DPRINTF( "\n Block Stat Size Id\n" );
ptr = (char*)subheap + subheap->headerSize;
while (ptr < (char *)subheap + subheap->size)
{
if (*(DWORD *)ptr & ARENA_FLAG_FREE)
{
ARENA_FREE *pArena = (ARENA_FREE *)ptr;
DPRINTF( "%08lx free %08lx %04x prev=%08lx next=%08lx\n",
(DWORD)pArena, pArena->size & ARENA_SIZE_MASK,
pArena->threadId, (DWORD)pArena->prev,
(DWORD)pArena->next);
ptr += sizeof(*pArena) + (pArena->size & ARENA_SIZE_MASK);
arenaSize += sizeof(ARENA_FREE);
freeSize += pArena->size & ARENA_SIZE_MASK;
}
else if (*(DWORD *)ptr & ARENA_FLAG_PREV_FREE)
{
ARENA_INUSE *pArena = (ARENA_INUSE *)ptr;
DPRINTF( "%08lx Used %08lx %04x back=%08lx\n",
(DWORD)pArena, pArena->size & ARENA_SIZE_MASK,
pArena->threadId, *((DWORD *)pArena - 1));
ptr += sizeof(*pArena) + (pArena->size & ARENA_SIZE_MASK);
arenaSize += sizeof(ARENA_INUSE);
usedSize += pArena->size & ARENA_SIZE_MASK;
}
else
{
ARENA_INUSE *pArena = (ARENA_INUSE *)ptr;
DPRINTF( "%08lx used %08lx %04x\n",
(DWORD)pArena, pArena->size & ARENA_SIZE_MASK,
pArena->threadId);
ptr += sizeof(*pArena) + (pArena->size & ARENA_SIZE_MASK);
arenaSize += sizeof(ARENA_INUSE);
usedSize += pArena->size & ARENA_SIZE_MASK;
}
}
DPRINTF( "\nTotal: Size=%08lx Committed=%08lx Free=%08lx Used=%08lx Arenas=%08lx (%ld%%)\n\n",
subheap->size, subheap->commitSize, freeSize, usedSize,
arenaSize, (arenaSize * 100) / subheap->size );
subheap = subheap->next;
}
}
/***********************************************************************
* HEAP_GetPtr
* RETURNS
* Pointer to the heap
* NULL: Failure
*/
static PHEAP
HEAP_GetPtr(HANDLE heap) /* [in] Handle to the heap */
{
HEAP *heapPtr = (HEAP *)heap;
if (!heapPtr || (heapPtr->magic != HEAP_MAGIC))
{
ERR("Invalid heap %08x!\n", heap );
return NULL;
}
if (TRACE_ON(heap) && !HEAP_IsRealArena( heap, 0, NULL, NOISY ))
{
HEAP_Dump( heapPtr );
assert( FALSE );
return NULL;
}
return heapPtr;
}
/***********************************************************************
* HEAP_InsertFreeBlock
*
* Insert a free block into the free list.
*/
static VOID
HEAP_InsertFreeBlock(PHEAP heap,
ARENA_FREE *pArena,
BOOL last)
{
FREE_LIST_ENTRY *pEntry = heap->freeList;
while (pEntry->size < pArena->size) pEntry++;
if (last)
{
/* insert at end of free list, i.e. before next free list entry */
pEntry++;
if (pEntry == &heap->freeList[HEAP_NB_FREE_LISTS])
{
pEntry = heap->freeList;
}
pArena->prev = pEntry->arena.prev;
pArena->prev->next = pArena;
pArena->next = &pEntry->arena;
pEntry->arena.prev = pArena;
}
else
{
/* insert at head of free list */
pArena->next = pEntry->arena.next;
pArena->next->prev = pArena;
pArena->prev = &pEntry->arena;
pEntry->arena.next = pArena;
}
pArena->size |= ARENA_FLAG_FREE;
}
/***********************************************************************
* HEAP_FindSubHeap
* Find the sub-heap containing a given address.
*
* RETURNS
* Pointer: Success
* NULL: Failure
*/
static PSUBHEAP
HEAP_FindSubHeap(HEAP *heap, /* [in] Heap pointer */
LPCVOID ptr) /* [in] Address */
{
SUBHEAP *sub = &heap->subheap;
while (sub)
{
if (((char *)ptr >= (char *)sub) &&
((char *)ptr < (char *)sub + sub->size)) return sub;
sub = sub->next;
}
return NULL;
}
/***********************************************************************
* HEAP_Commit
*
* Make sure the heap storage is committed up to (not including) ptr.
*/
static inline BOOL
HEAP_Commit(SUBHEAP *subheap,
void *ptr,
DWORD flags)
{
DWORD size = (DWORD)((char *)ptr - (char *)subheap);
NTSTATUS Status;
PVOID address;
ULONG commitsize;
size = (size + COMMIT_MASK) & ~COMMIT_MASK;
if (size > subheap->size) size = subheap->size;
if (size <= subheap->commitSize) return TRUE;
address = (PVOID)((char *)subheap + subheap->commitSize);
commitsize = size - subheap->commitSize;
if (!(flags & HEAP_NO_VALLOC))
{
Status = NtAllocateVirtualMemory(NtCurrentProcess(),
&address,
0,
&commitsize,
MEM_COMMIT,
PAGE_EXECUTE_READWRITE);
if (!NT_SUCCESS(Status))
{
WARN("Could not commit %08lx bytes at %08lx for heap %08lx\n",
size - subheap->commitSize,
(DWORD)((char *)subheap + subheap->commitSize),
(DWORD)subheap->heap );
return FALSE;
}
}
subheap->commitSize += commitsize;
return TRUE;
}
/***********************************************************************
* HEAP_Decommit
*
* If possible, decommit the heap storage from (including) 'ptr'.
*/
static inline BOOL HEAP_Decommit( SUBHEAP *subheap, void *ptr, DWORD flags )
{
DWORD size = (DWORD)((char *)ptr - (char *)subheap);
PVOID address;
ULONG decommitsize;
NTSTATUS Status;
/* round to next block and add one full block */
size = ((size + COMMIT_MASK) & ~COMMIT_MASK) + COMMIT_MASK + 1;
if (size >= subheap->commitSize) return TRUE;
address = (PVOID)((char *)subheap + size);
decommitsize = subheap->commitSize - size;
if (!(flags & HEAP_NO_VALLOC))
{
Status = ZwFreeVirtualMemory(NtCurrentProcess(),
&address,
&decommitsize,
MEM_DECOMMIT);
if (!NT_SUCCESS(Status));
{
WARN("Could not decommit %08lx bytes at %08lx for heap %08lx\n",
subheap->commitSize - size,
(DWORD)((char *)subheap + size),
(DWORD)subheap->heap );
return FALSE;
}
}
subheap->commitSize -= decommitsize;
return TRUE;
}
/***********************************************************************
* HEAP_CreateFreeBlock
*
* Create a free block at a specified address. 'size' is the size of the
* whole block, including the new arena.
*/
static void HEAP_CreateFreeBlock( SUBHEAP *subheap, void *ptr, DWORD size )
{
ARENA_FREE *pFree;
BOOL last;
/* Create a free arena */
pFree = (ARENA_FREE *)ptr;
pFree->threadId = (DWORD)NtCurrentTeb()->Cid.UniqueThread;
pFree->magic = ARENA_FREE_MAGIC;
/* If debugging, erase the freed block content */
if (TRACE_ON(heap))
{
char *pEnd = (char *)ptr + size;
if (pEnd > (char *)subheap + subheap->commitSize)
pEnd = (char *)subheap + subheap->commitSize;
if (pEnd > (char *)(pFree + 1))
memset( pFree + 1, ARENA_FREE_FILLER, pEnd - (char *)(pFree + 1) );
}
/* Check if next block is free also */
if (((char *)ptr + size < (char *)subheap + subheap->size) &&
(*(DWORD *)((char *)ptr + size) & ARENA_FLAG_FREE))
{
/* Remove the next arena from the free list */
ARENA_FREE *pNext = (ARENA_FREE *)((char *)ptr + size);
pNext->next->prev = pNext->prev;
pNext->prev->next = pNext->next;
size += (pNext->size & ARENA_SIZE_MASK) + sizeof(*pNext);
if (TRACE_ON(heap))
memset( pNext, ARENA_FREE_FILLER, 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;
*(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,
DWORD flags)
{
ARENA_FREE *pFree;
DWORD 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 */
pFree->next->prev = pFree->prev;
pFree->prev->next = pFree->next;
}
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))
{
SUBHEAP *pPrev = &subheap->heap->subheap;
/* Remove the free block from the list */
pFree->next->prev = pFree->prev;
pFree->prev->next = pFree->next;
/* 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;
if (!(flags & HEAP_NO_VALLOC))
{
ULONG dummySize = 0;
ZwFreeVirtualMemory(NtCurrentProcess(),
(PVOID*)&subheap,
&dummySize,
MEM_RELEASE);
}
return;
}
/* Decommit the end of the heap */
}
/***********************************************************************
* HEAP_ShrinkBlock
*
* Shrink an in-use block.
*/
static void HEAP_ShrinkBlock(SUBHEAP *subheap, ARENA_INUSE *pArena, DWORD size)
{
if ((pArena->size & ARENA_SIZE_MASK) >= size + HEAP_MIN_BLOCK_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,
DWORD commitSize, DWORD totalSize )
{
SUBHEAP *subheap = (SUBHEAP *)address;
FREE_LIST_ENTRY *pEntry;
int i;
NTSTATUS Status;
/* Commit memory */
if (!(flags & HEAP_NO_VALLOC))
{
Status = ZwAllocateVirtualMemory(NtCurrentProcess(),
&address,
0,
(PULONG)&commitSize,
MEM_COMMIT,
PAGE_EXECUTE_READWRITE);
if (!NT_SUCCESS(Status))
{
WARN("Could not commit %08lx bytes for sub-heap %08lx\n",
commitSize, (DWORD)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 = sizeof(SUBHEAP);
subheap->next = heap->subheap.next;
heap->subheap.next = subheap;
}
else
{
/* If this is a primary subheap, initialize main heap */
subheap->headerSize = sizeof(HEAP);
subheap->next = NULL;
heap->next = NULL;
heap->flags = flags;
heap->magic = HEAP_MAGIC;
/* Build the free lists */
for (i = 0, pEntry = heap->freeList; i < HEAP_NB_FREE_LISTS; i++, pEntry++)
{
pEntry->size = HEAP_freeListSizes[i];
pEntry->arena.size = 0 | ARENA_FLAG_FREE;
pEntry->arena.next = i < HEAP_NB_FREE_LISTS-1 ?
&heap->freeList[i+1].arena : &heap->freeList[0].arena;
pEntry->arena.prev = i ? &heap->freeList[i-1].arena :
&heap->freeList[HEAP_NB_FREE_LISTS-1].arena;
pEntry->arena.threadId = 0;
pEntry->arena.magic = ARENA_FREE_MAGIC;
}
/* Initialize critical section */
RtlInitializeCriticalSection( &heap->critSection );
}
/* 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(PVOID BaseAddress,
HEAP *heap, DWORD flags,
DWORD commitSize, DWORD totalSize )
{
LPVOID address;
NTSTATUS Status;
/* Round-up sizes on a 64K boundary */
totalSize = (totalSize + 0xffff) & 0xffff0000;
commitSize = (commitSize + 0xffff) & 0xffff0000;
if (!commitSize) commitSize = 0x10000;
if (totalSize < commitSize) totalSize = commitSize;
/* Allocate the memory block */
address = BaseAddress;
if (!(flags & HEAP_NO_VALLOC))
{
Status = ZwAllocateVirtualMemory(NtCurrentProcess(),
&address,
0,
(PULONG)&totalSize,
MEM_RESERVE | MEM_COMMIT,
PAGE_EXECUTE_READWRITE);
if (!NT_SUCCESS(Status))
{
WARN("Could not VirtualAlloc %08lx bytes\n",
totalSize );
return NULL;
}
}
/* Initialize subheap */
if (!HEAP_InitSubHeap( heap? heap : (HEAP *)address,
address, flags, commitSize, totalSize ))
{
if (address && !(flags & HEAP_NO_VALLOC))
{
ULONG dummySize = 0;
ZwFreeVirtualMemory(NtCurrentProcess(),
&address,
&dummySize,
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, DWORD size,
SUBHEAP **ppSubHeap )
{
SUBHEAP *subheap;
ARENA_FREE *pArena;
FREE_LIST_ENTRY *pEntry = heap->freeList;
/* Find a suitable free list, and in it find a block large enough */
while (pEntry->size < size) pEntry++;
pArena = pEntry->arena.next;
while (pArena != &heap->freeList[0].arena)
{
DWORD 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, (char *)pArena + sizeof(ARENA_INUSE)
+ size + HEAP_MIN_BLOCK_SIZE,
heap->flags))
return NULL;
*ppSubHeap = subheap;
return pArena;
}
pArena = pArena->next;
}
/* If no block was found, attempt to grow the heap */
if (!(heap->flags & HEAP_GROWABLE))
{
WARN("Not enough space in heap %08lx for %08lx bytes\n",
(DWORD)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 inuse, and HEAP_MIN_BLOCK_SIZE for the second free arena that
* might get assigned all remaining free space in HEAP_ShrinkBlock() */
size += sizeof(SUBHEAP) + sizeof(ARENA_FREE) + HEAP_MIN_BLOCK_SIZE;
if (!(subheap = HEAP_CreateSubHeap( NULL, heap, heap->flags, size,
max( HEAP_DEF_SIZE, size ) )))
return NULL;
TRACE("created new sub-heap %08lx of %08lx bytes for heap %08lx\n",
(DWORD)subheap, size, (DWORD)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( HEAP *heap, void *ptr )
{
int i;
SUBHEAP *subheap = HEAP_FindSubHeap( heap, ptr );
if (!subheap) return FALSE;
if ((char *)ptr >= (char *)subheap + subheap->headerSize) return TRUE;
if (subheap != &heap->subheap) return FALSE;
for (i = 0; i < HEAP_NB_FREE_LISTS; i++)
if (ptr == (void *)&heap->freeList[i].arena) return TRUE;
return FALSE;
}
/***********************************************************************
* HEAP_ValidateFreeArena
*/
static BOOL HEAP_ValidateFreeArena( SUBHEAP *subheap, ARENA_FREE *pArena )
{
char *heapEnd = (char *)subheap + subheap->size;
/* Check magic number */
if (pArena->magic != ARENA_FREE_MAGIC)
{
ERR("Heap %08lx: invalid free arena magic for %08lx\n",
(DWORD)subheap->heap, (DWORD)pArena );
return FALSE;
}
/* Check size flags */
if (!(pArena->size & ARENA_FLAG_FREE) ||
(pArena->size & ARENA_FLAG_PREV_FREE))
{
ERR("Heap %08lx: bad flags %lx for free arena %08lx\n",
(DWORD)subheap->heap, pArena->size & ~ARENA_SIZE_MASK, (DWORD)pArena );
}
/* Check arena size */
if ((char *)(pArena + 1) + (pArena->size & ARENA_SIZE_MASK) > heapEnd)
{
ERR("Heap %08lx: bad size %08lx for free arena %08lx\n",
(DWORD)subheap->heap, (DWORD)pArena->size & ARENA_SIZE_MASK, (DWORD)pArena );
return FALSE;
}
/* Check that next pointer is valid */
if (!HEAP_IsValidArenaPtr( subheap->heap, pArena->next ))
{
ERR("Heap %08lx: bad next ptr %08lx for arena %08lx\n",
(DWORD)subheap->heap, (DWORD)pArena->next, (DWORD)pArena );
return FALSE;
}
/* Check that next arena is free */
if (!(pArena->next->size & ARENA_FLAG_FREE) ||
(pArena->next->magic != ARENA_FREE_MAGIC))
{
ERR("Heap %08lx: next arena %08lx invalid for %08lx\n",
(DWORD)subheap->heap, (DWORD)pArena->next, (DWORD)pArena );
return FALSE;
}
/* Check that prev pointer is valid */
if (!HEAP_IsValidArenaPtr( subheap->heap, pArena->prev ))
{
ERR("Heap %08lx: bad prev ptr %08lx for arena %08lx\n",
(DWORD)subheap->heap, (DWORD)pArena->prev, (DWORD)pArena );
return FALSE;
}
/* Check that prev arena is free */
if (!(pArena->prev->size & ARENA_FLAG_FREE) ||
(pArena->prev->magic != ARENA_FREE_MAGIC))
{
ERR("Heap %08lx: prev arena %08lx invalid for %08lx\n",
(DWORD)subheap->heap, (DWORD)pArena->prev, (DWORD)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 %08lx: free arena %08lx next block has no PREV_FREE flag\n",
(DWORD)subheap->heap, (DWORD)pArena );
return FALSE;
}
/* Check next block back pointer */
if (*((ARENA_FREE **)((char *)(pArena + 1) +
(pArena->size & ARENA_SIZE_MASK)) - 1) != pArena)
{
ERR("Heap %08lx: arena %08lx has wrong back ptr %08lx\n",
(DWORD)subheap->heap, (DWORD)pArena,
*((DWORD *)((char *)(pArena+1)+ (pArena->size & ARENA_SIZE_MASK)) - 1));
return FALSE;
}
}
return TRUE;
}
/***********************************************************************
* HEAP_ValidateInUseArena
*/
static BOOL HEAP_ValidateInUseArena( SUBHEAP *subheap, ARENA_INUSE *pArena, BOOL quiet )
{
char *heapEnd = (char *)subheap + subheap->size;
/* Check magic number */
if (pArena->magic != ARENA_INUSE_MAGIC)
{
if (quiet == NOISY) {
ERR("Heap %08lx: invalid in-use arena magic for %08lx\n",
(DWORD)subheap->heap, (DWORD)pArena );
if (TRACE_ON(heap))
HEAP_Dump( subheap->heap );
} else if (WARN_ON(heap)) {
WARN("Heap %08lx: invalid in-use arena magic for %08lx\n",
(DWORD)subheap->heap, (DWORD)pArena );
if (TRACE_ON(heap))
HEAP_Dump( subheap->heap );
}
return FALSE;
}
/* Check size flags */
if (pArena->size & ARENA_FLAG_FREE)
{
ERR("Heap %08lx: bad flags %lx for in-use arena %08lx\n",
(DWORD)subheap->heap, pArena->size & ~ARENA_SIZE_MASK, (DWORD)pArena );
return FALSE;
}
/* Check arena size */
if ((char *)(pArena + 1) + (pArena->size & ARENA_SIZE_MASK) > heapEnd)
{
ERR("Heap %08lx: bad size %08lx for in-use arena %08lx\n",
(DWORD)subheap->heap, (DWORD)pArena->size & ARENA_SIZE_MASK, (DWORD)pArena );
return FALSE;
}
/* Check next arena PREV_FREE flag */
if (((char *)(pArena + 1) + (pArena->size & ARENA_SIZE_MASK) < heapEnd) &&
(*(DWORD *)((char *)(pArena + 1) + (pArena->size & ARENA_SIZE_MASK)) & ARENA_FLAG_PREV_FREE))
{
ERR("Heap %08lx: in-use arena %08lx next block has PREV_FREE flag\n",
(DWORD)subheap->heap, (DWORD)pArena );
return FALSE;
}
/* Check prev free arena */
if (pArena->size & ARENA_FLAG_PREV_FREE)
{
ARENA_FREE *pPrev = *((ARENA_FREE **)pArena - 1);
/* Check prev pointer */
if (!HEAP_IsValidArenaPtr( subheap->heap, pPrev ))
{
ERR("Heap %08lx: bad back ptr %08lx for arena %08lx\n",
(DWORD)subheap->heap, (DWORD)pPrev, (DWORD)pArena );
return FALSE;
}
/* Check that prev arena is free */
if (!(pPrev->size & ARENA_FLAG_FREE) ||
(pPrev->magic != ARENA_FREE_MAGIC))
{
ERR("Heap %08lx: prev arena %08lx invalid for in-use %08lx\n",
(DWORD)subheap->heap, (DWORD)pPrev, (DWORD)pArena );
return FALSE;
}
/* Check that prev arena is really the previous block */
if ((char *)(pPrev + 1) + (pPrev->size & ARENA_SIZE_MASK) != (char *)pArena)
{
ERR("Heap %08lx: prev arena %08lx is not prev for in-use %08lx\n",
(DWORD)subheap->heap, (DWORD)pPrev, (DWORD)pArena );
return FALSE;
}
}
return TRUE;
}
/***********************************************************************
* HEAP_IsInsideHeap
* Checks whether the pointer points to a block inside a given heap.
*
* NOTES
* Should this return BOOL32?
*
* RETURNS
* !0: Success
* 0: Failure
*/
int HEAP_IsInsideHeap(
HANDLE heap, /* [in] Heap */
DWORD flags, /* [in] Flags */
LPCVOID ptr /* [in] Pointer */
) {
HEAP *heapPtr = HEAP_GetPtr( heap );
SUBHEAP *subheap;
int ret;
/* Validate the parameters */
if (!heapPtr) return 0;
flags |= heapPtr->flags;
if (!(flags & HEAP_NO_SERIALIZE)) RtlEnterCriticalSection( &heapPtr->critSection );
ret = (((subheap = HEAP_FindSubHeap( heapPtr, ptr )) != NULL) &&
(((char *)ptr >= (char *)subheap + subheap->headerSize
+ sizeof(ARENA_INUSE))));
if (!(flags & HEAP_NO_SERIALIZE)) RtlLeaveCriticalSection( &heapPtr->critSection );
return ret;
}
/***********************************************************************
* HEAP_IsRealArena [Internal]
* Validates a block is a valid arena.
*
* RETURNS
* TRUE: Success
* FALSE: Failure
*/
static BOOL HEAP_IsRealArena(
HANDLE heap, /* [in] Handle 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;
HEAP *heapPtr = (HEAP *)(heap);
BOOL ret = TRUE;
if (!heapPtr || (heapPtr->magic != HEAP_MAGIC))
{
ERR("Invalid heap %08x!\n", heap );
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 */
/* The following code is really HEAP_IsInsideHeap *
* with serialization already done. */
if (!(subheap = HEAP_FindSubHeap( heapPtr, block )) ||
((char *)block < (char *)subheap + subheap->headerSize
+ sizeof(ARENA_INUSE)))
{
if (quiet == NOISY)
{
ERR("Heap %08lx: block %08lx is not inside heap\n",
(DWORD)heap, (DWORD)block );
}
else if (WARN_ON(heap))
{
WARN("Heap %08lx: block %08lx is not inside heap\n",
(DWORD)heap, (DWORD)block );
}
ret = FALSE;
} else
ret = HEAP_ValidateInUseArena( subheap, (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;
}
/***********************************************************************
* HeapCreate (KERNEL32.336)
* RETURNS
* Handle of heap: Success
* NULL: Failure
*
* @implemented
*/
HANDLE STDCALL
RtlCreateHeap(ULONG flags,
PVOID BaseAddress,
ULONG maxSize,
ULONG initialSize,
PVOID Unknown,
PRTL_HEAP_DEFINITION Definition)
{
SUBHEAP *subheap;
ULONG i;
/* Allocate the heap block */
if (!maxSize)
{
maxSize = HEAP_DEF_SIZE;
flags |= HEAP_GROWABLE;
}
if (!(subheap = HEAP_CreateSubHeap( BaseAddress, NULL, flags, initialSize, maxSize )))
{
return 0;
}
RtlEnterCriticalSection (&RtlpProcessHeapsListLock);
for (i = 0; i < NtCurrentPeb ()->NumberOfHeaps; i++)
{
if (NtCurrentPeb ()->ProcessHeaps[i] == NULL)
{
NtCurrentPeb()->ProcessHeaps[i] = (PVOID)subheap;
break;
}
}
RtlLeaveCriticalSection (&RtlpProcessHeapsListLock);
return (HANDLE)subheap;
}
/***********************************************************************
* HeapDestroy (KERNEL32.337)
* RETURNS
* TRUE: Success
* FALSE: Failure
*
* @implemented
*/
BOOL STDCALL
RtlDestroyHeap(HANDLE heap) /* [in] Handle of heap */
{
HEAP *heapPtr = HEAP_GetPtr( heap );
SUBHEAP *subheap;
ULONG i, flags;
TRACE("%08x\n", heap );
if (!heapPtr) return FALSE;
RtlEnterCriticalSection (&RtlpProcessHeapsListLock);
for (i = 0; i < NtCurrentPeb ()->NumberOfHeaps; i++)
{
if (NtCurrentPeb ()->ProcessHeaps[i] == heap)
{
NtCurrentPeb()->ProcessHeaps[i] = NULL;
break;
}
}
RtlLeaveCriticalSection (&RtlpProcessHeapsListLock);
RtlDeleteCriticalSection( &heapPtr->critSection );
subheap = &heapPtr->subheap;
// We must save the flags. The first subheap is located after
// the heap structure. If we release the first subheap,
// we release also the heap structure.
flags = heapPtr->flags;
while (subheap)
{
SUBHEAP *next = subheap->next;
if (!(flags & HEAP_NO_VALLOC))
{
ULONG dummySize = 0;
ZwFreeVirtualMemory(NtCurrentProcess(),
(PVOID*)&subheap,
&dummySize,
MEM_RELEASE);
}
subheap = next;
}
return TRUE;
}
/***********************************************************************
* HeapAlloc (KERNEL32.334)
* RETURNS
* Pointer to allocated memory block
* NULL: Failure
* 0x7d030f60--invalid flags in RtlHeapAllocate
* @implemented
*/
PVOID STDCALL
RtlAllocateHeap(HANDLE heap, /* [in] Handle of private heap block */
ULONG flags, /* [in] Heap allocation control flags */
ULONG size) /* [in] Number of bytes to allocate */
{
ARENA_FREE *pArena;
ARENA_INUSE *pInUse;
SUBHEAP *subheap;
HEAP *heapPtr = HEAP_GetPtr( heap );
/* Validate the parameters */
if (!heapPtr)
{
if (flags & HEAP_GENERATE_EXCEPTIONS) RtlRaiseStatus( STATUS_NO_MEMORY );
return NULL;
}
flags &= HEAP_GENERATE_EXCEPTIONS | HEAP_NO_SERIALIZE | HEAP_ZERO_MEMORY;
flags |= heapPtr->flags;
if (!(flags & HEAP_NO_SERIALIZE)) RtlEnterCriticalSection( &heapPtr->critSection );
size = (size + 7) & ~7;
if (size < HEAP_MIN_BLOCK_SIZE) size = HEAP_MIN_BLOCK_SIZE;
/* Locate a suitable free block */
if (!(pArena = HEAP_FindFreeBlock( heapPtr, size, &subheap )))
{
TRACE("(%08x,%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 */
pArena->next->prev = pArena->prev;
pArena->prev->next = pArena->next;
/* Build the in-use arena */
pInUse = (ARENA_INUSE *)pArena;
pInUse->size = (pInUse->size & ~ARENA_FLAG_FREE)
+ sizeof(ARENA_FREE) - sizeof(ARENA_INUSE);
pInUse->threadId = (DWORD)NtCurrentTeb()->Cid.UniqueThread;
pInUse->magic = ARENA_INUSE_MAGIC;
/* Shrink the block */
HEAP_ShrinkBlock( subheap, pInUse, size );
if (flags & HEAP_ZERO_MEMORY)
memset( pInUse + 1, 0, pInUse->size & ARENA_SIZE_MASK );
else if (TRACE_ON(heap))
memset( pInUse + 1, ARENA_INUSE_FILLER, pInUse->size & ARENA_SIZE_MASK );
if (!(flags & HEAP_NO_SERIALIZE)) RtlLeaveCriticalSection( &heapPtr->critSection );
TRACE("(%08x,%08lx,%08lx): returning %08lx\n",
heap, flags, size, (DWORD)(pInUse + 1) );
return (LPVOID)(pInUse + 1);
}
/***********************************************************************
* HeapFree (KERNEL32.338)
* RETURNS
* TRUE: Success
* FALSE: Failure
*
* @implemented
*/
BOOLEAN STDCALL RtlFreeHeap(
HANDLE heap, /* [in] Handle of heap */
ULONG flags, /* [in] Heap freeing flags */
PVOID ptr /* [in] Address of memory to free */
) {
ARENA_INUSE *pInUse;
SUBHEAP *subheap;
HEAP *heapPtr = HEAP_GetPtr( heap );
/* Validate the parameters */
if (!heapPtr) return FALSE;
if (!ptr) /* Freeing a NULL ptr is doesn't indicate an error in Win2k */
{
WARN("(%08x,%08lx,%08lx): asked to free NULL\n",
heap, flags, (DWORD)ptr );
return TRUE;
}
flags &= HEAP_NO_SERIALIZE;
flags |= heapPtr->flags;
if (!(flags & HEAP_NO_SERIALIZE)) RtlEnterCriticalSection( &heapPtr->critSection );
if (!HEAP_IsRealArena( heap, HEAP_NO_SERIALIZE, ptr, QUIET ))
{
if (!(flags & HEAP_NO_SERIALIZE)) RtlLeaveCriticalSection( &heapPtr->critSection );
TRACE("(%08x,%08lx,%08lx): returning FALSE\n",
heap, flags, (DWORD)ptr );
return FALSE;
}
/* Turn the block into a free block */
pInUse = (ARENA_INUSE *)ptr - 1;
subheap = HEAP_FindSubHeap( heapPtr, pInUse );
HEAP_MakeInUseBlockFree( subheap, pInUse, heapPtr->flags );
if (!(flags & HEAP_NO_SERIALIZE)) RtlLeaveCriticalSection( &heapPtr->critSection );
TRACE("(%08x,%08lx,%08lx): returning TRUE\n",
heap, flags, (DWORD)ptr );
return TRUE;
}
/***********************************************************************
* HeapReAlloc (KERNEL32.340)
* RETURNS
* Pointer to reallocated memory block
* NULL: Failure
* 0x7d030f60--invalid flags in RtlHeapAllocate
* @implemented
*/
LPVOID STDCALL RtlReAllocateHeap(
HANDLE heap, /* [in] Handle of heap block */
DWORD flags, /* [in] Heap reallocation flags */
LPVOID ptr, /* [in] Address of memory to reallocate */
DWORD size /* [in] Number of bytes to reallocate */
) {
ARENA_INUSE *pArena;
DWORD oldSize;
HEAP *heapPtr;
SUBHEAP *subheap;
if (!ptr) return RtlAllocateHeap( heap, flags, size ); /* FIXME: correct? */
if (!(heapPtr = HEAP_GetPtr( heap ))) return FALSE;
/* Validate the parameters */
flags &= HEAP_GENERATE_EXCEPTIONS | HEAP_NO_SERIALIZE | HEAP_ZERO_MEMORY |
HEAP_REALLOC_IN_PLACE_ONLY;
flags |= heapPtr->flags;
size = (size + 7) & ~7;
if (size < HEAP_MIN_BLOCK_SIZE) size = HEAP_MIN_BLOCK_SIZE;
if (!(flags & HEAP_NO_SERIALIZE)) RtlEnterCriticalSection( &heapPtr->critSection );
if (!HEAP_IsRealArena( heap, HEAP_NO_SERIALIZE, ptr, QUIET ))
{
if (!(flags & HEAP_NO_SERIALIZE)) RtlLeaveCriticalSection( &heapPtr->critSection );
TRACE("(%08x,%08lx,%08lx,%08lx): returning NULL\n",
heap, flags, (DWORD)ptr, size );
if (flags & HEAP_GENERATE_EXCEPTIONS) RtlRaiseStatus( STATUS_NO_MEMORY );
return NULL;
}
/* Check if we need to grow the block */
pArena = (ARENA_INUSE *)ptr - 1;
pArena->threadId = (DWORD)NtCurrentTeb()->Cid.UniqueThread;
subheap = HEAP_FindSubHeap( heapPtr, pArena );
oldSize = (pArena->size & ARENA_SIZE_MASK);
if (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) >= size))
{
/* The next block is free and large enough */
ARENA_FREE *pFree = (ARENA_FREE *)pNext;
pFree->next->prev = pFree->prev;
pFree->prev->next = pFree->next;
pArena->size += (pFree->size & ARENA_SIZE_MASK) + sizeof(*pFree);
if (!HEAP_Commit( subheap, (char *)pArena + sizeof(ARENA_INUSE)
+ size + HEAP_MIN_BLOCK_SIZE,
heapPtr->flags))
{
if (!(flags & HEAP_NO_SERIALIZE)) RtlLeaveCriticalSection( &heapPtr->critSection );
if (flags & HEAP_GENERATE_EXCEPTIONS) RtlRaiseStatus( STATUS_NO_MEMORY );
return NULL;
}
HEAP_ShrinkBlock( subheap, pArena, 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, size, &newsubheap )))
{
if (!(flags & HEAP_NO_SERIALIZE)) RtlLeaveCriticalSection( &heapPtr->critSection );
if (flags & HEAP_GENERATE_EXCEPTIONS) RtlRaiseStatus( STATUS_NO_MEMORY );
return NULL;
}
/* Build the in-use arena */
pNew->next->prev = pNew->prev;
pNew->prev->next = pNew->next;
pInUse = (ARENA_INUSE *)pNew;
pInUse->size = (pInUse->size & ~ARENA_FLAG_FREE)
+ sizeof(ARENA_FREE) - sizeof(ARENA_INUSE);
pInUse->threadId = (DWORD)NtCurrentTeb()->Cid.UniqueThread;
pInUse->magic = ARENA_INUSE_MAGIC;
HEAP_ShrinkBlock( newsubheap, pInUse, size );
memcpy( pInUse + 1, pArena + 1, oldSize );
/* Free the previous block */
HEAP_MakeInUseBlockFree( subheap, pArena, flags );
subheap = newsubheap;
pArena = pInUse;
}
}
else HEAP_ShrinkBlock( subheap, pArena, size ); /* Shrink the block */
/* Clear the extra bytes if needed */
if (size > oldSize)
{
if (flags & HEAP_ZERO_MEMORY)
memset( (char *)(pArena + 1) + oldSize, 0,
(pArena->size & ARENA_SIZE_MASK) - oldSize );
else if (TRACE_ON(heap))
memset( (char *)(pArena + 1) + oldSize, ARENA_INUSE_FILLER,
(pArena->size & ARENA_SIZE_MASK) - oldSize );
}
/* Return the new arena */
if (!(flags & HEAP_NO_SERIALIZE)) RtlLeaveCriticalSection( &heapPtr->critSection );
TRACE("(%08x,%08lx,%08lx,%08lx): returning %08lx\n",
heap, flags, (DWORD)ptr, size, (DWORD)(pArena + 1) );
return (LPVOID)(pArena + 1);
}
/***********************************************************************
* HeapCompact (KERNEL32.335)
*
* @unimplemented
*/
DWORD STDCALL RtlCompactHeap( HANDLE heap, DWORD flags )
{
SetLastError(ERROR_CALL_NOT_IMPLEMENTED);
return 0;
}
/***********************************************************************
* HeapLock (KERNEL32.339)
* Attempts to acquire the critical section object for a specified heap.
*
* RETURNS
* TRUE: Success
* FALSE: Failure
*
* @implemented
*/
BOOL STDCALL RtlLockHeap(
HANDLE heap /* [in] Handle of heap to lock for exclusive access */
) {
HEAP *heapPtr = HEAP_GetPtr( heap );
if (!heapPtr) return FALSE;
RtlEnterCriticalSection( &heapPtr->critSection );
return TRUE;
}
/***********************************************************************
* HeapUnlock (KERNEL32.342)
* Releases ownership of the critical section object.
*
* RETURNS
* TRUE: Success
* FALSE: Failure
*
* @implemented
*/
BOOL STDCALL RtlUnlockHeap(
HANDLE heap /* [in] Handle to the heap to unlock */
) {
HEAP *heapPtr = HEAP_GetPtr( heap );
if (!heapPtr) return FALSE;
RtlLeaveCriticalSection( &heapPtr->critSection );
return TRUE;
}
/***********************************************************************
* HeapSize (KERNEL32.341)
* RETURNS
* Size in bytes of allocated memory
* 0xffffffff: Failure
*
* @implemented
*/
DWORD STDCALL RtlSizeHeap(
HANDLE heap, /* [in] Handle of heap */
DWORD flags, /* [in] Heap size control flags */
LPVOID ptr /* [in] Address of memory to return size for */
) {
DWORD ret;
HEAP *heapPtr = HEAP_GetPtr( heap );
if (!heapPtr) return FALSE;
flags &= HEAP_NO_SERIALIZE;
flags |= heapPtr->flags;
if (!(flags & HEAP_NO_SERIALIZE)) RtlEnterCriticalSection( &heapPtr->critSection );
if (!HEAP_IsRealArena( heap, HEAP_NO_SERIALIZE, ptr, QUIET ))
{
SetLastError( ERROR_INVALID_PARAMETER );
ret = 0xffffffff;
}
else
{
ARENA_INUSE *pArena = (ARENA_INUSE *)ptr - 1;
ret = pArena->size & ARENA_SIZE_MASK;
}
if (!(flags & HEAP_NO_SERIALIZE)) RtlLeaveCriticalSection( &heapPtr->critSection );
TRACE("(%08x,%08lx,%08lx): returning %08lx\n",
heap, flags, (DWORD)ptr, ret );
return ret;
}
/***********************************************************************
* HeapValidate (KERNEL32.343)
* Validates a specified heap.
*
* NOTES
* Flags is ignored.
*
* RETURNS
* TRUE: Success
* FALSE: Failure
*
* @implemented
*/
BOOL STDCALL RtlValidateHeap(
HANDLE heap, /* [in] Handle to the heap */
DWORD flags, /* [in] Bit flags that control access during operation */
PVOID block /* [in] Optional pointer to memory block to validate */
) {
HEAP *heapPtr = HEAP_GetPtr( heap );
if (!heapPtr) return FALSE;
return HEAP_IsRealArena( heapPtr, flags, block, QUIET );
}
/***********************************************************************
* HeapWalk (KERNEL32.344)
* Enumerates the memory blocks in a specified heap.
* See HEAP_Dump() for info on heap structure.
*
* TODO
* - handling of PROCESS_HEAP_ENTRY_MOVEABLE and
* PROCESS_HEAP_ENTRY_DDESHARE (needs heap.c support)
*
* RETURNS
* TRUE: Success
* FALSE: Failure
*/
#if 0
BOOL STDCALL HeapWalk(
HANDLE heap, /* [in] Handle to heap to enumerate */
LPPROCESS_HEAP_ENTRY entry /* [out] Pointer to structure of enumeration info */
) {
HEAP *heapPtr = HEAP_GetPtr(heap);
SUBHEAP *sub, *currentheap = NULL;
BOOL ret = FALSE;
char *ptr;
int region_index = 0;
if (!heapPtr || !entry)
{
SetLastError(ERROR_INVALID_PARAMETER);
return FALSE;
}
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 0x%08x.\n", heap);
/*HEAP_Dump(heapPtr);*/
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");
SetLastError(ERROR_NO_MORE_ITEMS);
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");
SetLastError(ERROR_NO_MORE_ITEMS);
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->Foo.Region.dwCommittedSize = currentheap->commitSize;
entry->Foo.Region.dwUnCommittedSize =
currentheap->size - currentheap->commitSize;
entry->Foo.Region.lpFirstBlock = /* first valid block */
currentheap + currentheap->headerSize;
entry->Foo.Region.lpLastBlock = /* first invalid block */
currentheap + currentheap->size;
}
ret = TRUE;
HW_end:
if (!(heapPtr->flags & HEAP_NO_SERIALIZE)) RtlLeaveCriticalSection( &heapPtr->critSection );
return ret;
}
#endif
VOID
RtlInitializeHeapManager(VOID)
{
PPEB Peb;
Peb = NtCurrentPeb();
Peb->NumberOfHeaps = 0;
Peb->MaximumNumberOfHeaps = (PAGE_SIZE - sizeof(PEB)) / sizeof(HANDLE);
Peb->ProcessHeaps = (PVOID)Peb + sizeof(PEB);
RtlInitializeCriticalSection(&RtlpProcessHeapsListLock);
}
/*
* @implemented
*/
NTSTATUS STDCALL
RtlEnumProcessHeaps(DWORD STDCALL_FUNC(*func)(void*,LONG),
LONG lParam)
{
NTSTATUS Status = STATUS_SUCCESS;
ULONG i;
RtlEnterCriticalSection(&RtlpProcessHeapsListLock);
for (i = 0; i < NtCurrentPeb()->NumberOfHeaps; i++)
{
Status = func(NtCurrentPeb()->ProcessHeaps[i],lParam);
if (!NT_SUCCESS(Status))
break;
}
RtlLeaveCriticalSection(&RtlpProcessHeapsListLock);
return Status;
}
/*
* @implemented
*/
ULONG STDCALL
RtlGetProcessHeaps(ULONG HeapCount,
HANDLE *HeapArray)
{
ULONG Result = 0;
RtlEnterCriticalSection(&RtlpProcessHeapsListLock);
if (NtCurrentPeb()->NumberOfHeaps <= HeapCount)
{
Result = NtCurrentPeb()->NumberOfHeaps;
memmove(HeapArray,
NtCurrentPeb()->ProcessHeaps,
Result * sizeof(HANDLE));
}
RtlLeaveCriticalSection (&RtlpProcessHeapsListLock);
return Result;
}
/*
* @implemented
*/
BOOLEAN STDCALL
RtlValidateProcessHeaps(VOID)
{
HANDLE Heaps[128];
BOOLEAN Result = TRUE;
ULONG HeapCount;
ULONG i;
HeapCount = RtlGetProcessHeaps(128, Heaps);
for (i = 0; i < HeapCount; i++)
{
if (!RtlValidateHeap(Heaps[i], 0, NULL))
Result = FALSE;
}
return Result;
}
/* EOF */
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