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Make sure allocated blocks are aligned on an 8-byte boundary.

This commit is contained in:
Alexandre Julliard 2002-07-01 18:41:47 +00:00
parent 770c33f68e
commit 82696f43ee
1 changed files with 16 additions and 18 deletions
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34
dlls/ntdll/heap.c
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@ -66,6 +66,9 @@ typedef struct tagARENA_FREE
#define ARENA_INUSE_FILLER 0x55
#define ARENA_FREE_FILLER 0xaa
#define ALIGNMENT 8 /* everything is aligned on 8 byte boundaries */
#define ROUND_SIZE(size) (((size) + ALIGNMENT - 1) & ~(ALIGNMENT-1))
#define QUIET 1 /* Suppress messages */
#define NOISY 0 /* Report all errors */
@ -495,7 +498,7 @@ static BOOL HEAP_InitSubHeap( HEAP *heap, LPVOID address, DWORD flags,
{
/* If this is a secondary subheap, insert it into list */
subheap->headerSize = sizeof(SUBHEAP);
subheap->headerSize = ROUND_SIZE( sizeof(SUBHEAP) );
subheap->next = heap->subheap.next;
heap->subheap.next = subheap;
}
@ -503,7 +506,7 @@ static BOOL HEAP_InitSubHeap( HEAP *heap, LPVOID address, DWORD flags,
{
/* If this is a primary subheap, initialize main heap */
subheap->headerSize = sizeof(HEAP);
subheap->headerSize = ROUND_SIZE( sizeof(HEAP) );
subheap->next = NULL;
heap->next = NULL;
heap->flags = flags;
@ -548,14 +551,14 @@ static SUBHEAP *HEAP_CreateSubHeap( HEAP *heap, void *base, DWORD flags,
{
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)
{
/* 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 */
if (!(address = VirtualAlloc( NULL, totalSize, MEM_RESERVE, PAGE_EXECUTE_READWRITE )))
{
@ -624,7 +627,7 @@ static ARENA_FREE *HEAP_FindFreeBlock( HEAP *heap, DWORD size,
* 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_INUSE) + HEAP_MIN_BLOCK_SIZE;
size += ROUND_SIZE(sizeof(SUBHEAP)) + sizeof(ARENA_INUSE) + HEAP_MIN_BLOCK_SIZE;
if (!(subheap = HEAP_CreateSubHeap( heap, NULL, heap->flags, size,
max( HEAP_DEF_SIZE, size ) )))
return NULL;
@ -663,7 +666,7 @@ static BOOL HEAP_ValidateFreeArena( SUBHEAP *subheap, ARENA_FREE *pArena )
char *heapEnd = (char *)subheap + subheap->size;
/* Check for unaligned pointers */
if ( (long)pArena % sizeof(void *) != 0 )
if ( (long)pArena % ALIGNMENT != 0 )
{
ERR( "Heap %08lx: unaligned arena pointer %08lx\n",
(DWORD)subheap->heap, (DWORD)pArena );
@ -755,7 +758,7 @@ static BOOL HEAP_ValidateInUseArena( SUBHEAP *subheap, ARENA_INUSE *pArena, BOOL
char *heapEnd = (char *)subheap + subheap->size;
/* Check for unaligned pointers */
if ( (long)pArena % sizeof(void *) != 0 )
if ( (long)pArena % ALIGNMENT != 0 )
{
if ( quiet == NOISY )
{
@ -938,11 +941,6 @@ HANDLE WINAPI RtlCreateHeap( ULONG flags, PVOID addr, ULONG totalSize, ULONG com
totalSize = HEAP_DEF_SIZE;
flags |= HEAP_GROWABLE;
}
/* round up sizes */
totalSize = (totalSize + 0xffff) & 0xffff0000;
commitSize = (commitSize + 0xffff) & 0xffff0000;
if (!commitSize) commitSize = 0x10000;
if (totalSize < commitSize) totalSize = commitSize;
if (!(subheap = HEAP_CreateSubHeap( NULL, addr, flags, commitSize, totalSize ))) return 0;
@ -1014,7 +1012,7 @@ PVOID WINAPI RtlAllocateHeap( HANDLE heap, ULONG flags, ULONG size )
if (!heapPtr) return NULL;
flags &= HEAP_GENERATE_EXCEPTIONS | HEAP_NO_SERIALIZE | HEAP_ZERO_MEMORY;
flags |= heapPtr->flags;
size = (size + 3) & ~3;
size = ROUND_SIZE(size);
if (size < HEAP_MIN_BLOCK_SIZE) size = HEAP_MIN_BLOCK_SIZE;
if (!(flags & HEAP_NO_SERIALIZE)) RtlEnterCriticalSection( &heapPtr->critSection );
@ -1126,7 +1124,7 @@ PVOID WINAPI RtlReAllocateHeap( HANDLE heap, ULONG flags, PVOID ptr, ULONG size
flags &= HEAP_GENERATE_EXCEPTIONS | HEAP_NO_SERIALIZE | HEAP_ZERO_MEMORY |
HEAP_REALLOC_IN_PLACE_ONLY;
flags |= heapPtr->flags;
size = (size + 3) & ~3;
size = ROUND_SIZE(size);
if (size < HEAP_MIN_BLOCK_SIZE) size = HEAP_MIN_BLOCK_SIZE;
if (!(flags & HEAP_NO_SERIALIZE)) RtlEnterCriticalSection( &heapPtr->critSection );