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Fixed a bug in RtlDestroyHeap, that will cause a page fault, if more than one subheap exist.

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svn path=/trunk/; revision=2820
This commit is contained in:
Hartmut Birr 2002-04-03 00:04:01 +00:00
parent bcde238ede
commit 224bb37961
1 changed files with 6 additions and 2 deletions
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8
reactos/lib/ntdll/rtl/heap.c
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@ -1046,7 +1046,7 @@ RtlDestroyHeap(HANDLE heap) /* [in] Handle of heap */
{ {
HEAP *heapPtr = HEAP_GetPtr( heap ); HEAP *heapPtr = HEAP_GetPtr( heap );
SUBHEAP *subheap; SUBHEAP *subheap;
ULONG i; ULONG i, flags;
TRACE("%08x\n", heap ); TRACE("%08x\n", heap );
if (!heapPtr) return FALSE; if (!heapPtr) return FALSE;
@ -1064,11 +1064,15 @@ RtlDestroyHeap(HANDLE heap) /* [in] Handle of heap */
RtlDeleteCriticalSection( &heapPtr->critSection ); RtlDeleteCriticalSection( &heapPtr->critSection );
subheap = &heapPtr->subheap; 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) while (subheap)
{ {
SUBHEAP *next = subheap->next; SUBHEAP *next = subheap->next;
if (!(heapPtr->flags & HEAP_NO_VALLOC)) if (!(flags & HEAP_NO_VALLOC))
{ {
ULONG dummySize = 0; ULONG dummySize = 0;
ZwFreeVirtualMemory(NtCurrentProcess(), ZwFreeVirtualMemory(NtCurrentProcess(),