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[RTL/DPH]

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- Zero-initialize VM allocation base.
- Don't reserve VM, just commit it right away. This was a premature optimisation. Instead, retry committing a smaller amount of memory if committing all memory fails.

svn path=/trunk/; revision=50800
This commit is contained in:
Aleksey Bragin 2011-02-18 14:45:13 +00:00
parent b58bdd0a99
commit da4ba71aee
1 changed files with 24 additions and 15 deletions
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39
reactos/lib/rtl/heappage.c
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@ -108,9 +108,6 @@ ULONG RtlpPageHeapSizeRangeStart, RtlpPageHeapSizeRangeEnd;
ULONG RtlpPageHeapDllRangeStart, RtlpPageHeapDllRangeEnd;
WCHAR RtlpDphTargetDlls[512];
ULONG RtlpDphBreakOptions;
ULONG RtlpDphDebugOptions;
LIST_ENTRY RtlpDphPageHeapList;
BOOLEAN RtlpDphPageHeapListInitialized;
RTL_CRITICAL_SECTION RtlpDphPageHeapListLock;
@ -177,6 +174,10 @@ LONG RtlpDphProtectFails;
#define POINTER_REMOVE_BIAS(ptr) ((ULONG_PTR)(ptr) & ~(ULONG_PTR)1)
#define POINTER_ADD_BIAS(ptr) ((ULONG_PTR)(ptr) & 1)
ULONG RtlpDphBreakOptions = 0;//0xFFFFFFFF;
ULONG RtlpDphDebugOptions;
/* FUNCTIONS ******************************************************************/
BOOLEAN NTAPI
@ -312,7 +313,7 @@ RtlpDphAllocateVm(PVOID *Base, SIZE_T Size, ULONG Type, ULONG Protection)
&Size,
Type,
Protection);
DPRINT1("Page heap: AllocVm (%p, %p, %x) status %x \n", Base, Size, Type, Status);
/* Check for failures */
if (!NT_SUCCESS(Status))
{
@ -348,7 +349,7 @@ RtlpDphFreeVm(PVOID Base, SIZE_T Size, ULONG Type)
/* Free the memory */
Status = RtlpSecMemFreeVirtualMemory(NtCurrentProcess(), &Base, &Size, Type);
DPRINT1("Page heap: FreeVm (%p, %p, %x) status %x \n", Base, Size, Type, Status);
/* Log/report failures */
if (!NT_SUCCESS(Status))
{
@ -811,7 +812,7 @@ RtlpDphAllocateNode(PDPH_HEAP_ROOT DphRoot)
PDPH_HEAP_BLOCK Node;
NTSTATUS Status;
SIZE_T Size = DPH_POOL_SIZE, SizeVirtual;
PVOID Ptr;
PVOID Ptr = NULL;
/* Check for the easy case */
if (DphRoot->pUnusedNodeListHead)
@ -920,7 +921,7 @@ RtlpDphGrowVirtual(PDPH_HEAP_ROOT DphRoot,
SIZE_T Size)
{
PDPH_HEAP_BLOCK Node, AvailableNode;
PVOID Base;
PVOID Base = NULL;
SIZE_T VirtualSize;
NTSTATUS Status;
@ -937,18 +938,26 @@ RtlpDphGrowVirtual(PDPH_HEAP_ROOT DphRoot,
}
/* Calculate size of VM to allocate by rounding it up */
VirtualSize = (Size + 0xFFFF) & 0xFFFF0000;
if (VirtualSize < DPH_RESERVE_SIZE)
Size = ROUND_UP(Size, 0xFFFF);
VirtualSize = Size;
if (Size < DPH_RESERVE_SIZE)
VirtualSize = DPH_RESERVE_SIZE;
/* Allocate the virtual memory */
Status = RtlpDphAllocateVm(&Base, VirtualSize, MEM_RESERVE, PAGE_NOACCESS);
// FIXME: Shouldn't it be MEM_RESERVE with later committing?
Status = RtlpDphAllocateVm(&Base, VirtualSize, MEM_COMMIT, PAGE_NOACCESS);
if (!NT_SUCCESS(Status))
{
/* Free the allocated node and return failure */
RtlpDphReturnNodeToUnusedList(DphRoot, Node);
RtlpDphReturnNodeToUnusedList(DphRoot, AvailableNode);
return FALSE;
/* Retry again with a smaller size */
VirtualSize = Size;
Status = RtlpDphAllocateVm(&Base, VirtualSize, MEM_COMMIT, PAGE_NOACCESS);
if (!NT_SUCCESS(Status))
{
/* Free the allocated node and return failure */
RtlpDphReturnNodeToUnusedList(DphRoot, Node);
RtlpDphReturnNodeToUnusedList(DphRoot, AvailableNode);
return FALSE;
}
}
/* Set up our two nodes describing this VM */
@ -1287,7 +1296,7 @@ RtlpPageHeapCreate(ULONG Flags,
PVOID Lock,
PRTL_HEAP_PARAMETERS Parameters)
{
PVOID Base;
PVOID Base = NULL;
PHEAP HeapPtr;
PDPH_HEAP_ROOT DphRoot;
PDPH_HEAP_BLOCK DphNode;