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527f2f9057
* Create a branch for some evul shell experiments. svn path=/branches/shell-experiments/; revision=61927
3960 lines
124 KiB
C
3960 lines
124 KiB
C
/* COPYRIGHT: See COPYING in the top level directory
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* PROJECT: ReactOS system libraries
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* FILE: lib/rtl/heap.c
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* PURPOSE: RTL Heap backend allocator
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* PROGRAMMERS: Copyright 2010 Aleksey Bragin
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*/
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/* Useful references:
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http://msdn.microsoft.com/en-us/library/ms810466.aspx
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http://msdn.microsoft.com/en-us/library/ms810603.aspx
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http://www.securitylab.ru/analytics/216376.php
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http://binglongx.spaces.live.com/blog/cns!142CBF6D49079DE8!596.entry
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http://www.phreedom.org/research/exploits/asn1-bitstring/
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http://illmatics.com/Understanding_the_LFH.pdf
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http://www.alex-ionescu.com/?p=18
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*/
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/* INCLUDES *****************************************************************/
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#include <rtl.h>
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#include <heap.h>
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#define NDEBUG
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#include <debug.h>
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/* Bitmaps stuff */
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/* How many least significant bits are clear */
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UCHAR RtlpBitsClearLow[] =
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{
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8,0,1,0,2,0,1,0,3,0,1,0,2,0,1,0,
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4,0,1,0,2,0,1,0,3,0,1,0,2,0,1,0,
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5,0,1,0,2,0,1,0,3,0,1,0,2,0,1,0,
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4,0,1,0,2,0,1,0,3,0,1,0,2,0,1,0,
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6,0,1,0,2,0,1,0,3,0,1,0,2,0,1,0,
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4,0,1,0,2,0,1,0,3,0,1,0,2,0,1,0,
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5,0,1,0,2,0,1,0,3,0,1,0,2,0,1,0,
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4,0,1,0,2,0,1,0,3,0,1,0,2,0,1,0,
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7,0,1,0,2,0,1,0,3,0,1,0,2,0,1,0,
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4,0,1,0,2,0,1,0,3,0,1,0,2,0,1,0,
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5,0,1,0,2,0,1,0,3,0,1,0,2,0,1,0,
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4,0,1,0,2,0,1,0,3,0,1,0,2,0,1,0,
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6,0,1,0,2,0,1,0,3,0,1,0,2,0,1,0,
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4,0,1,0,2,0,1,0,3,0,1,0,2,0,1,0,
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5,0,1,0,2,0,1,0,3,0,1,0,2,0,1,0,
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4,0,1,0,2,0,1,0,3,0,1,0,2,0,1,0
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};
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UCHAR FORCEINLINE
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RtlpFindLeastSetBit(ULONG Bits)
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{
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if (Bits & 0xFFFF)
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{
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if (Bits & 0xFF)
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return RtlpBitsClearLow[Bits & 0xFF]; /* Lowest byte */
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else
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return RtlpBitsClearLow[(Bits >> 8) & 0xFF] + 8; /* 2nd byte */
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}
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else
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{
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if ((Bits >> 16) & 0xFF)
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return RtlpBitsClearLow[(Bits >> 16) & 0xFF] + 16; /* 3rd byte */
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else
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return RtlpBitsClearLow[(Bits >> 24) & 0xFF] + 24; /* Highest byte */
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}
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}
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/* Maximum size of a tail-filling pattern used for compare operation */
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UCHAR FillPattern[HEAP_ENTRY_SIZE] =
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{
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HEAP_TAIL_FILL,
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HEAP_TAIL_FILL,
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HEAP_TAIL_FILL,
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HEAP_TAIL_FILL,
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HEAP_TAIL_FILL,
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HEAP_TAIL_FILL,
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HEAP_TAIL_FILL,
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HEAP_TAIL_FILL
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};
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/* FUNCTIONS *****************************************************************/
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NTSTATUS NTAPI
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RtlpInitializeHeap(OUT PHEAP Heap,
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IN ULONG Flags,
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IN PHEAP_LOCK Lock OPTIONAL,
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IN PRTL_HEAP_PARAMETERS Parameters)
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{
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ULONG NumUCRs = 8;
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ULONG Index;
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SIZE_T HeaderSize;
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NTSTATUS Status;
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PHEAP_UCR_DESCRIPTOR UcrDescriptor;
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/* Preconditions */
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ASSERT(Heap != NULL);
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ASSERT(Parameters != NULL);
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ASSERT(!(Flags & HEAP_LOCK_USER_ALLOCATED));
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ASSERT(!(Flags & HEAP_NO_SERIALIZE) || (Lock == NULL)); /* HEAP_NO_SERIALIZE => no lock */
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/* Start out with the size of a plain Heap header */
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HeaderSize = ROUND_UP(sizeof(HEAP), sizeof(HEAP_ENTRY));
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/* Check if space needs to be added for the Heap Lock */
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if (!(Flags & HEAP_NO_SERIALIZE))
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{
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if (Lock != NULL)
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/* The user manages the Heap Lock */
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Flags |= HEAP_LOCK_USER_ALLOCATED;
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else
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if (RtlpGetMode() == UserMode)
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{
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/* In user mode, the Heap Lock trails the Heap header */
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Lock = (PHEAP_LOCK) ((ULONG_PTR) (Heap) + HeaderSize);
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HeaderSize += ROUND_UP(sizeof(HEAP_LOCK), sizeof(HEAP_ENTRY));
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}
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}
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/* Add space for the initial Heap UnCommitted Range Descriptor list */
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UcrDescriptor = (PHEAP_UCR_DESCRIPTOR) ((ULONG_PTR) (Heap) + HeaderSize);
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HeaderSize += ROUND_UP(NumUCRs * sizeof(HEAP_UCR_DESCRIPTOR), sizeof(HEAP_ENTRY));
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/* Sanity check */
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ASSERT(HeaderSize <= PAGE_SIZE);
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/* Initialise the Heap Entry header containing the Heap header */
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Heap->Entry.Size = (USHORT)(HeaderSize >> HEAP_ENTRY_SHIFT);
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Heap->Entry.Flags = HEAP_ENTRY_BUSY;
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Heap->Entry.SmallTagIndex = LOBYTE(Heap->Entry.Size) ^ HIBYTE(Heap->Entry.Size) ^ Heap->Entry.Flags;
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Heap->Entry.PreviousSize = 0;
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Heap->Entry.SegmentOffset = 0;
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Heap->Entry.UnusedBytes = 0;
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/* Initialise the Heap header */
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Heap->Signature = HEAP_SIGNATURE;
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Heap->Flags = Flags;
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Heap->ForceFlags = (Flags & (HEAP_NO_SERIALIZE |
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HEAP_GENERATE_EXCEPTIONS |
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HEAP_ZERO_MEMORY |
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HEAP_REALLOC_IN_PLACE_ONLY |
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HEAP_VALIDATE_PARAMETERS_ENABLED |
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HEAP_VALIDATE_ALL_ENABLED |
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HEAP_TAIL_CHECKING_ENABLED |
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HEAP_CREATE_ALIGN_16 |
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HEAP_FREE_CHECKING_ENABLED));
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/* Initialise the Heap parameters */
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Heap->VirtualMemoryThreshold = ROUND_UP(Parameters->VirtualMemoryThreshold, sizeof(HEAP_ENTRY)) >> HEAP_ENTRY_SHIFT;
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Heap->SegmentReserve = Parameters->SegmentReserve;
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Heap->SegmentCommit = Parameters->SegmentCommit;
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Heap->DeCommitFreeBlockThreshold = Parameters->DeCommitFreeBlockThreshold >> HEAP_ENTRY_SHIFT;
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Heap->DeCommitTotalFreeThreshold = Parameters->DeCommitTotalFreeThreshold >> HEAP_ENTRY_SHIFT;
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Heap->MaximumAllocationSize = Parameters->MaximumAllocationSize;
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Heap->CommitRoutine = Parameters->CommitRoutine;
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/* Initialise the Heap validation info */
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Heap->HeaderValidateCopy = NULL;
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Heap->HeaderValidateLength = (USHORT)HeaderSize;
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/* Initialise the Heap Lock */
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if (!(Flags & HEAP_NO_SERIALIZE) && !(Flags & HEAP_LOCK_USER_ALLOCATED))
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{
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Status = RtlInitializeHeapLock(&Lock);
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if (!NT_SUCCESS(Status))
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return Status;
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}
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Heap->LockVariable = Lock;
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/* Initialise the Heap alignment info */
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if (Flags & HEAP_CREATE_ALIGN_16)
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{
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Heap->AlignMask = (ULONG) ~15;
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Heap->AlignRound = 15 + sizeof(HEAP_ENTRY);
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}
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else
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{
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Heap->AlignMask = (ULONG) ~(sizeof(HEAP_ENTRY) - 1);
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Heap->AlignRound = 2 * sizeof(HEAP_ENTRY) - 1;
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}
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if (Flags & HEAP_TAIL_CHECKING_ENABLED)
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Heap->AlignRound += sizeof(HEAP_ENTRY);
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/* Initialise the Heap Segment list */
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for (Index = 0; Index < HEAP_SEGMENTS; ++Index)
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Heap->Segments[Index] = NULL;
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/* Initialise the Heap Free Heap Entry lists */
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for (Index = 0; Index < HEAP_FREELISTS; ++Index)
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InitializeListHead(&Heap->FreeLists[Index]);
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/* Initialise the Heap Virtual Allocated Blocks list */
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InitializeListHead(&Heap->VirtualAllocdBlocks);
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/* Initialise the Heap UnCommitted Region lists */
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InitializeListHead(&Heap->UCRSegments);
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InitializeListHead(&Heap->UCRList);
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/* Register the initial Heap UnCommitted Region Descriptors */
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for (Index = 0; Index < NumUCRs; ++Index)
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InsertTailList(&Heap->UCRList, &UcrDescriptor[Index].ListEntry);
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return STATUS_SUCCESS;
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}
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VOID FORCEINLINE
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RtlpSetFreeListsBit(PHEAP Heap,
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PHEAP_FREE_ENTRY FreeEntry)
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{
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ULONG Index, Bit;
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ASSERT(FreeEntry->Size < HEAP_FREELISTS);
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/* Calculate offset in the free list bitmap */
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Index = FreeEntry->Size >> 3; /* = FreeEntry->Size / (sizeof(UCHAR) * 8)*/
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Bit = 1 << (FreeEntry->Size & 7);
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/* Assure it's not already set */
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ASSERT((Heap->u.FreeListsInUseBytes[Index] & Bit) == 0);
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/* Set it */
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Heap->u.FreeListsInUseBytes[Index] |= Bit;
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}
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VOID FORCEINLINE
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RtlpClearFreeListsBit(PHEAP Heap,
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PHEAP_FREE_ENTRY FreeEntry)
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{
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ULONG Index, Bit;
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ASSERT(FreeEntry->Size < HEAP_FREELISTS);
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/* Calculate offset in the free list bitmap */
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Index = FreeEntry->Size >> 3; /* = FreeEntry->Size / (sizeof(UCHAR) * 8)*/
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Bit = 1 << (FreeEntry->Size & 7);
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/* Assure it was set and the corresponding free list is empty */
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ASSERT(Heap->u.FreeListsInUseBytes[Index] & Bit);
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ASSERT(IsListEmpty(&Heap->FreeLists[FreeEntry->Size]));
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/* Clear it */
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Heap->u.FreeListsInUseBytes[Index] ^= Bit;
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}
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VOID NTAPI
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RtlpInsertFreeBlockHelper(PHEAP Heap,
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PHEAP_FREE_ENTRY FreeEntry,
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SIZE_T BlockSize,
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BOOLEAN NoFill)
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{
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PLIST_ENTRY FreeListHead, Current;
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PHEAP_FREE_ENTRY CurrentEntry;
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ASSERT(FreeEntry->Size == BlockSize);
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/* Fill if it's not denied */
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if (!NoFill)
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{
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FreeEntry->Flags &= ~(HEAP_ENTRY_FILL_PATTERN |
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HEAP_ENTRY_EXTRA_PRESENT |
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HEAP_ENTRY_BUSY);
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if (Heap->Flags & HEAP_FREE_CHECKING_ENABLED)
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{
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RtlFillMemoryUlong((PCHAR)(FreeEntry + 1),
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(BlockSize << HEAP_ENTRY_SHIFT) - sizeof(*FreeEntry),
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ARENA_FREE_FILLER);
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FreeEntry->Flags |= HEAP_ENTRY_FILL_PATTERN;
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}
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}
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else
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{
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/* Clear out all flags except the last entry one */
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FreeEntry->Flags &= HEAP_ENTRY_LAST_ENTRY;
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}
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/* Insert it either into dedicated or non-dedicated list */
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if (BlockSize < HEAP_FREELISTS)
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{
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/* Dedicated list */
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FreeListHead = &Heap->FreeLists[BlockSize];
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if (IsListEmpty(FreeListHead))
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{
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RtlpSetFreeListsBit(Heap, FreeEntry);
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}
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}
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else
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{
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/* Non-dedicated one */
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FreeListHead = &Heap->FreeLists[0];
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Current = FreeListHead->Flink;
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/* Find a position where to insert it to (the list must be sorted) */
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while (FreeListHead != Current)
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{
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CurrentEntry = CONTAINING_RECORD(Current, HEAP_FREE_ENTRY, FreeList);
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if (BlockSize <= CurrentEntry->Size)
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break;
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Current = Current->Flink;
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}
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FreeListHead = Current;
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}
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/* Actually insert it into the list */
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InsertTailList(FreeListHead, &FreeEntry->FreeList);
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}
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VOID NTAPI
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RtlpInsertFreeBlock(PHEAP Heap,
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PHEAP_FREE_ENTRY FreeEntry,
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SIZE_T BlockSize)
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{
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USHORT Size, PreviousSize;
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UCHAR SegmentOffset, Flags;
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PHEAP_SEGMENT Segment;
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DPRINT("RtlpInsertFreeBlock(%p %p %x)\n", Heap, FreeEntry, BlockSize);
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/* Increase the free size counter */
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Heap->TotalFreeSize += BlockSize;
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/* Remember certain values */
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Flags = FreeEntry->Flags;
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PreviousSize = FreeEntry->PreviousSize;
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SegmentOffset = FreeEntry->SegmentOffset;
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Segment = Heap->Segments[SegmentOffset];
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/* Process it */
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while (BlockSize)
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{
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/* Check for the max size */
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if (BlockSize > HEAP_MAX_BLOCK_SIZE)
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{
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Size = HEAP_MAX_BLOCK_SIZE;
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/* Special compensation if it goes above limit just by 1 */
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if (BlockSize == (HEAP_MAX_BLOCK_SIZE + 1))
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Size -= 16;
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FreeEntry->Flags = 0;
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}
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else
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{
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Size = (USHORT)BlockSize;
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FreeEntry->Flags = Flags;
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}
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/* Change its size and insert it into a free list */
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FreeEntry->Size = Size;
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FreeEntry->PreviousSize = PreviousSize;
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FreeEntry->SegmentOffset = SegmentOffset;
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/* Call a helper to actually insert the block */
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RtlpInsertFreeBlockHelper(Heap, FreeEntry, Size, FALSE);
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/* Update sizes */
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PreviousSize = Size;
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BlockSize -= Size;
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/* Go to the next entry */
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FreeEntry = (PHEAP_FREE_ENTRY)((PHEAP_ENTRY)FreeEntry + Size);
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/* Check if that's all */
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if ((PHEAP_ENTRY)FreeEntry >= Segment->LastValidEntry) return;
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}
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/* Update previous size if needed */
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if (!(Flags & HEAP_ENTRY_LAST_ENTRY))
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FreeEntry->PreviousSize = PreviousSize;
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}
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VOID NTAPI
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RtlpRemoveFreeBlock(PHEAP Heap,
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PHEAP_FREE_ENTRY FreeEntry,
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BOOLEAN Dedicated,
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BOOLEAN NoFill)
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{
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SIZE_T Result, RealSize;
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/* Remove the free block and update the freelists bitmap */
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if (RemoveEntryList(&FreeEntry->FreeList) &&
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(Dedicated || (!Dedicated && FreeEntry->Size < HEAP_FREELISTS)))
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{
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RtlpClearFreeListsBit(Heap, FreeEntry);
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}
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/* Fill with pattern if necessary */
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if (!NoFill &&
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(FreeEntry->Flags & HEAP_ENTRY_FILL_PATTERN))
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{
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RealSize = (FreeEntry->Size << HEAP_ENTRY_SHIFT) - sizeof(*FreeEntry);
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/* Deduct extra stuff from block's real size */
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if (FreeEntry->Flags & HEAP_ENTRY_EXTRA_PRESENT &&
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RealSize > sizeof(HEAP_FREE_ENTRY_EXTRA))
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{
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RealSize -= sizeof(HEAP_FREE_ENTRY_EXTRA);
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}
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/* Check if the free filler is intact */
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Result = RtlCompareMemoryUlong((PCHAR)(FreeEntry + 1),
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RealSize,
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ARENA_FREE_FILLER);
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if (Result != RealSize)
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{
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DPRINT1("Free heap block %p modified at %p after it was freed\n",
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FreeEntry,
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(PCHAR)(FreeEntry + 1) + Result);
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}
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}
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}
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SIZE_T NTAPI
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RtlpGetSizeOfBigBlock(PHEAP_ENTRY HeapEntry)
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{
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PHEAP_VIRTUAL_ALLOC_ENTRY VirtualEntry;
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/* Get pointer to the containing record */
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VirtualEntry = CONTAINING_RECORD(HeapEntry, HEAP_VIRTUAL_ALLOC_ENTRY, BusyBlock);
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/* Restore the real size */
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return VirtualEntry->CommitSize - HeapEntry->Size;
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}
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PHEAP_UCR_DESCRIPTOR NTAPI
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RtlpCreateUnCommittedRange(PHEAP_SEGMENT Segment)
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{
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PLIST_ENTRY Entry;
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PHEAP_UCR_DESCRIPTOR UcrDescriptor;
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PHEAP_UCR_SEGMENT UcrSegment;
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PHEAP Heap = Segment->Heap;
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SIZE_T ReserveSize = 16 * PAGE_SIZE;
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SIZE_T CommitSize = 1 * PAGE_SIZE;
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NTSTATUS Status;
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DPRINT("RtlpCreateUnCommittedRange(%p)\n", Segment);
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/* Check if we have unused UCRs */
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if (IsListEmpty(&Heap->UCRList))
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{
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/* Get a pointer to the first UCR segment */
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UcrSegment = CONTAINING_RECORD(Heap->UCRSegments.Flink, HEAP_UCR_SEGMENT, ListEntry);
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/* Check the list of UCR segments */
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if (IsListEmpty(&Heap->UCRSegments) ||
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UcrSegment->ReservedSize == UcrSegment->CommittedSize)
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{
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/* We need to create a new one. Reserve 16 pages for it */
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UcrSegment = NULL;
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Status = ZwAllocateVirtualMemory(NtCurrentProcess(),
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(PVOID *)&UcrSegment,
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0,
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&ReserveSize,
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MEM_RESERVE,
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PAGE_READWRITE);
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if (!NT_SUCCESS(Status)) return NULL;
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/* Commit one page */
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Status = ZwAllocateVirtualMemory(NtCurrentProcess(),
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(PVOID *)&UcrSegment,
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0,
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&CommitSize,
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MEM_COMMIT,
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PAGE_READWRITE);
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if (!NT_SUCCESS(Status))
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{
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/* Release reserved memory */
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ZwFreeVirtualMemory(NtCurrentProcess(),
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(PVOID *)&UcrSegment,
|
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&ReserveSize,
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MEM_RELEASE);
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return NULL;
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}
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/* Set it's data */
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UcrSegment->ReservedSize = ReserveSize;
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UcrSegment->CommittedSize = CommitSize;
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/* Add it to the head of the list */
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|
InsertHeadList(&Heap->UCRSegments, &UcrSegment->ListEntry);
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|
/* Get a pointer to the first available UCR descriptor */
|
|
UcrDescriptor = (PHEAP_UCR_DESCRIPTOR)(UcrSegment + 1);
|
|
}
|
|
else
|
|
{
|
|
/* It's possible to use existing UCR segment. Commit one more page */
|
|
UcrDescriptor = (PHEAP_UCR_DESCRIPTOR)((PCHAR)UcrSegment + UcrSegment->CommittedSize);
|
|
Status = ZwAllocateVirtualMemory(NtCurrentProcess(),
|
|
(PVOID *)&UcrDescriptor,
|
|
0,
|
|
&CommitSize,
|
|
MEM_COMMIT,
|
|
PAGE_READWRITE);
|
|
|
|
if (!NT_SUCCESS(Status)) return NULL;
|
|
|
|
/* Update sizes */
|
|
UcrSegment->CommittedSize += CommitSize;
|
|
}
|
|
|
|
/* There is a whole bunch of new UCR descriptors. Put them into the unused list */
|
|
while ((PCHAR)(UcrDescriptor + 1) <= (PCHAR)UcrSegment + UcrSegment->CommittedSize)
|
|
{
|
|
InsertTailList(&Heap->UCRList, &UcrDescriptor->ListEntry);
|
|
UcrDescriptor++;
|
|
}
|
|
}
|
|
|
|
/* There are unused UCRs, just get the first one */
|
|
Entry = RemoveHeadList(&Heap->UCRList);
|
|
UcrDescriptor = CONTAINING_RECORD(Entry, HEAP_UCR_DESCRIPTOR, ListEntry);
|
|
return UcrDescriptor;
|
|
}
|
|
|
|
VOID NTAPI
|
|
RtlpDestroyUnCommittedRange(PHEAP_SEGMENT Segment,
|
|
PHEAP_UCR_DESCRIPTOR UcrDescriptor)
|
|
{
|
|
/* Zero it out */
|
|
UcrDescriptor->Address = NULL;
|
|
UcrDescriptor->Size = 0;
|
|
|
|
/* Put it into the heap's list of unused UCRs */
|
|
InsertHeadList(&Segment->Heap->UCRList, &UcrDescriptor->ListEntry);
|
|
}
|
|
|
|
VOID NTAPI
|
|
RtlpInsertUnCommittedPages(PHEAP_SEGMENT Segment,
|
|
ULONG_PTR Address,
|
|
SIZE_T Size)
|
|
{
|
|
PLIST_ENTRY Current;
|
|
PHEAP_UCR_DESCRIPTOR UcrDescriptor;
|
|
|
|
DPRINT("RtlpInsertUnCommittedPages(%p %08Ix %Ix)\n", Segment, Address, Size);
|
|
|
|
/* Go through the list of UCR descriptors, they are sorted from lowest address
|
|
to the highest */
|
|
Current = Segment->UCRSegmentList.Flink;
|
|
while (Current != &Segment->UCRSegmentList)
|
|
{
|
|
UcrDescriptor = CONTAINING_RECORD(Current, HEAP_UCR_DESCRIPTOR, SegmentEntry);
|
|
|
|
if ((ULONG_PTR)UcrDescriptor->Address > Address)
|
|
{
|
|
/* Check for a really lucky case */
|
|
if ((Address + Size) == (ULONG_PTR)UcrDescriptor->Address)
|
|
{
|
|
/* Exact match */
|
|
UcrDescriptor->Address = (PVOID)Address;
|
|
UcrDescriptor->Size += Size;
|
|
return;
|
|
}
|
|
|
|
/* We found the block before which the new one should go */
|
|
break;
|
|
}
|
|
else if (((ULONG_PTR)UcrDescriptor->Address + UcrDescriptor->Size) == Address)
|
|
{
|
|
/* Modify this entry */
|
|
Address = (ULONG_PTR)UcrDescriptor->Address;
|
|
Size += UcrDescriptor->Size;
|
|
|
|
/* Advance to the next descriptor */
|
|
Current = Current->Flink;
|
|
|
|
/* Remove the current descriptor from the list and destroy it */
|
|
RemoveEntryList(&UcrDescriptor->SegmentEntry);
|
|
RtlpDestroyUnCommittedRange(Segment, UcrDescriptor);
|
|
|
|
Segment->NumberOfUnCommittedRanges--;
|
|
}
|
|
else
|
|
{
|
|
/* Advance to the next descriptor */
|
|
Current = Current->Flink;
|
|
}
|
|
}
|
|
|
|
/* Create a new UCR descriptor */
|
|
UcrDescriptor = RtlpCreateUnCommittedRange(Segment);
|
|
if (!UcrDescriptor) return;
|
|
|
|
UcrDescriptor->Address = (PVOID)Address;
|
|
UcrDescriptor->Size = Size;
|
|
|
|
/* "Current" is the descriptor before which our one should go */
|
|
InsertTailList(Current, &UcrDescriptor->SegmentEntry);
|
|
|
|
DPRINT("Added segment UCR with base %08Ix, size 0x%x\n", Address, Size);
|
|
|
|
/* Increase counters */
|
|
Segment->NumberOfUnCommittedRanges++;
|
|
}
|
|
|
|
PHEAP_FREE_ENTRY NTAPI
|
|
RtlpFindAndCommitPages(PHEAP Heap,
|
|
PHEAP_SEGMENT Segment,
|
|
PSIZE_T Size,
|
|
PVOID AddressRequested)
|
|
{
|
|
PLIST_ENTRY Current;
|
|
ULONG_PTR Address = 0;
|
|
PHEAP_UCR_DESCRIPTOR UcrDescriptor, PreviousUcr = NULL;
|
|
PHEAP_ENTRY FirstEntry, LastEntry;
|
|
NTSTATUS Status;
|
|
|
|
DPRINT("RtlpFindAndCommitPages(%p %p %Ix %08Ix)\n", Heap, Segment, *Size, Address);
|
|
|
|
/* Go through UCRs in a segment */
|
|
Current = Segment->UCRSegmentList.Flink;
|
|
while (Current != &Segment->UCRSegmentList)
|
|
{
|
|
UcrDescriptor = CONTAINING_RECORD(Current, HEAP_UCR_DESCRIPTOR, SegmentEntry);
|
|
|
|
/* Check if we can use that one right away */
|
|
if (UcrDescriptor->Size >= *Size &&
|
|
(UcrDescriptor->Address == AddressRequested || !AddressRequested))
|
|
{
|
|
/* Get the address */
|
|
Address = (ULONG_PTR)UcrDescriptor->Address;
|
|
|
|
/* Commit it */
|
|
if (Heap->CommitRoutine)
|
|
{
|
|
Status = Heap->CommitRoutine(Heap, (PVOID *)&Address, Size);
|
|
}
|
|
else
|
|
{
|
|
Status = ZwAllocateVirtualMemory(NtCurrentProcess(),
|
|
(PVOID *)&Address,
|
|
0,
|
|
Size,
|
|
MEM_COMMIT,
|
|
PAGE_READWRITE);
|
|
}
|
|
|
|
DPRINT("Committed %Iu bytes at base %08Ix, UCR size is %lu\n", *Size, Address, UcrDescriptor->Size);
|
|
|
|
/* Fail in unsuccessful case */
|
|
if (!NT_SUCCESS(Status))
|
|
{
|
|
DPRINT1("Committing page failed with status 0x%08X\n", Status);
|
|
return NULL;
|
|
}
|
|
|
|
/* Update tracking numbers */
|
|
Segment->NumberOfUnCommittedPages -= (ULONG)(*Size / PAGE_SIZE);
|
|
|
|
/* Calculate first and last entries */
|
|
FirstEntry = (PHEAP_ENTRY)Address;
|
|
|
|
/* Go through the entries to find the last one */
|
|
if (PreviousUcr)
|
|
LastEntry = (PHEAP_ENTRY)((ULONG_PTR)PreviousUcr->Address + PreviousUcr->Size);
|
|
else
|
|
LastEntry = &Segment->Entry;
|
|
|
|
while (!(LastEntry->Flags & HEAP_ENTRY_LAST_ENTRY))
|
|
{
|
|
ASSERT(LastEntry->Size != 0);
|
|
LastEntry += LastEntry->Size;
|
|
}
|
|
ASSERT((LastEntry + LastEntry->Size) == FirstEntry);
|
|
|
|
/* Unmark it as a last entry */
|
|
LastEntry->Flags &= ~HEAP_ENTRY_LAST_ENTRY;
|
|
|
|
/* Update UCR descriptor */
|
|
UcrDescriptor->Address = (PVOID)((ULONG_PTR)UcrDescriptor->Address + *Size);
|
|
UcrDescriptor->Size -= *Size;
|
|
|
|
DPRINT("Updating UcrDescriptor %p, new Address %p, size %lu\n",
|
|
UcrDescriptor, UcrDescriptor->Address, UcrDescriptor->Size);
|
|
|
|
/* Set various first entry fields */
|
|
FirstEntry->SegmentOffset = LastEntry->SegmentOffset;
|
|
FirstEntry->Size = (USHORT)(*Size >> HEAP_ENTRY_SHIFT);
|
|
FirstEntry->PreviousSize = LastEntry->Size;
|
|
|
|
/* Check if anything left in this UCR */
|
|
if (UcrDescriptor->Size == 0)
|
|
{
|
|
/* It's fully exhausted */
|
|
|
|
/* Check if this is the end of the segment */
|
|
if(UcrDescriptor->Address == Segment->LastValidEntry)
|
|
{
|
|
FirstEntry->Flags = HEAP_ENTRY_LAST_ENTRY;
|
|
}
|
|
else
|
|
{
|
|
FirstEntry->Flags = 0;
|
|
/* Update field of next entry */
|
|
ASSERT((FirstEntry + FirstEntry->Size)->PreviousSize == 0);
|
|
(FirstEntry + FirstEntry->Size)->PreviousSize = FirstEntry->Size;
|
|
}
|
|
|
|
/* This UCR needs to be removed because it became useless */
|
|
RemoveEntryList(&UcrDescriptor->SegmentEntry);
|
|
|
|
RtlpDestroyUnCommittedRange(Segment, UcrDescriptor);
|
|
Segment->NumberOfUnCommittedRanges--;
|
|
}
|
|
else
|
|
{
|
|
FirstEntry->Flags = HEAP_ENTRY_LAST_ENTRY;
|
|
}
|
|
|
|
/* We're done */
|
|
return (PHEAP_FREE_ENTRY)FirstEntry;
|
|
}
|
|
|
|
/* Advance to the next descriptor */
|
|
PreviousUcr = UcrDescriptor;
|
|
Current = Current->Flink;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
VOID NTAPI
|
|
RtlpDeCommitFreeBlock(PHEAP Heap,
|
|
PHEAP_FREE_ENTRY FreeEntry,
|
|
SIZE_T Size)
|
|
{
|
|
PHEAP_SEGMENT Segment;
|
|
PHEAP_ENTRY PrecedingInUseEntry = NULL, NextInUseEntry = NULL;
|
|
PHEAP_FREE_ENTRY NextFreeEntry;
|
|
PHEAP_UCR_DESCRIPTOR UcrDescriptor;
|
|
SIZE_T PrecedingSize, NextSize, DecommitSize;
|
|
ULONG_PTR DecommitBase;
|
|
NTSTATUS Status;
|
|
|
|
DPRINT("Decommitting %p %p %x\n", Heap, FreeEntry, Size);
|
|
|
|
/* We can't decommit if there is a commit routine! */
|
|
if (Heap->CommitRoutine)
|
|
{
|
|
/* Just add it back the usual way */
|
|
RtlpInsertFreeBlock(Heap, FreeEntry, Size);
|
|
return;
|
|
}
|
|
|
|
/* Get the segment */
|
|
Segment = Heap->Segments[FreeEntry->SegmentOffset];
|
|
|
|
/* Get the preceding entry */
|
|
DecommitBase = ROUND_UP(FreeEntry, PAGE_SIZE);
|
|
PrecedingSize = (PHEAP_ENTRY)DecommitBase - (PHEAP_ENTRY)FreeEntry;
|
|
|
|
if (PrecedingSize == 1)
|
|
{
|
|
/* Just 1 heap entry, increase the base/size */
|
|
DecommitBase += PAGE_SIZE;
|
|
PrecedingSize += PAGE_SIZE >> HEAP_ENTRY_SHIFT;
|
|
}
|
|
else if (FreeEntry->PreviousSize &&
|
|
(DecommitBase == (ULONG_PTR)FreeEntry))
|
|
{
|
|
PrecedingInUseEntry = (PHEAP_ENTRY)FreeEntry - FreeEntry->PreviousSize;
|
|
}
|
|
|
|
/* Get the next entry */
|
|
NextFreeEntry = (PHEAP_FREE_ENTRY)((PHEAP_ENTRY)FreeEntry + Size);
|
|
DecommitSize = ROUND_DOWN(NextFreeEntry, PAGE_SIZE);
|
|
NextSize = (PHEAP_ENTRY)NextFreeEntry - (PHEAP_ENTRY)DecommitSize;
|
|
|
|
if (NextSize == 1)
|
|
{
|
|
/* Just 1 heap entry, increase the size */
|
|
DecommitSize -= PAGE_SIZE;
|
|
NextSize += PAGE_SIZE >> HEAP_ENTRY_SHIFT;
|
|
}
|
|
else if (NextSize == 0 &&
|
|
!(FreeEntry->Flags & HEAP_ENTRY_LAST_ENTRY))
|
|
{
|
|
NextInUseEntry = (PHEAP_ENTRY)NextFreeEntry;
|
|
}
|
|
|
|
NextFreeEntry = (PHEAP_FREE_ENTRY)((PHEAP_ENTRY)NextFreeEntry - NextSize);
|
|
|
|
/* Calculate real decommit size */
|
|
if (DecommitSize > DecommitBase)
|
|
{
|
|
DecommitSize -= DecommitBase;
|
|
}
|
|
else
|
|
{
|
|
/* Nothing to decommit */
|
|
RtlpInsertFreeBlock(Heap, FreeEntry, Size);
|
|
return;
|
|
}
|
|
|
|
/* A decommit is necessary. Create a UCR descriptor */
|
|
UcrDescriptor = RtlpCreateUnCommittedRange(Segment);
|
|
if (!UcrDescriptor)
|
|
{
|
|
DPRINT1("HEAP: Failed to create UCR descriptor\n");
|
|
RtlpInsertFreeBlock(Heap, FreeEntry, PrecedingSize);
|
|
return;
|
|
}
|
|
|
|
/* Decommit the memory */
|
|
Status = ZwFreeVirtualMemory(NtCurrentProcess(),
|
|
(PVOID *)&DecommitBase,
|
|
&DecommitSize,
|
|
MEM_DECOMMIT);
|
|
|
|
/* Delete that UCR. This is needed to assure there is an unused UCR entry in the list */
|
|
RtlpDestroyUnCommittedRange(Segment, UcrDescriptor);
|
|
|
|
if (!NT_SUCCESS(Status))
|
|
{
|
|
RtlpInsertFreeBlock(Heap, FreeEntry, Size);
|
|
return;
|
|
}
|
|
|
|
/* Insert uncommitted pages */
|
|
RtlpInsertUnCommittedPages(Segment, DecommitBase, DecommitSize);
|
|
Segment->NumberOfUnCommittedPages += (ULONG)(DecommitSize / PAGE_SIZE);
|
|
|
|
if (PrecedingSize)
|
|
{
|
|
/* Adjust size of this free entry and insert it */
|
|
FreeEntry->Flags = HEAP_ENTRY_LAST_ENTRY;
|
|
FreeEntry->Size = (USHORT)PrecedingSize;
|
|
Heap->TotalFreeSize += PrecedingSize;
|
|
|
|
/* Insert it into the free list */
|
|
RtlpInsertFreeBlockHelper(Heap, FreeEntry, PrecedingSize, FALSE);
|
|
}
|
|
else if (PrecedingInUseEntry)
|
|
{
|
|
/* Adjust preceding in use entry */
|
|
PrecedingInUseEntry->Flags |= HEAP_ENTRY_LAST_ENTRY;
|
|
}
|
|
|
|
/* Now the next one */
|
|
if (NextSize)
|
|
{
|
|
/* Adjust size of this free entry and insert it */
|
|
NextFreeEntry->Flags = 0;
|
|
NextFreeEntry->PreviousSize = 0;
|
|
NextFreeEntry->SegmentOffset = Segment->Entry.SegmentOffset;
|
|
NextFreeEntry->Size = (USHORT)NextSize;
|
|
|
|
((PHEAP_FREE_ENTRY)((PHEAP_ENTRY)NextFreeEntry + NextSize))->PreviousSize = (USHORT)NextSize;
|
|
|
|
Heap->TotalFreeSize += NextSize;
|
|
RtlpInsertFreeBlockHelper(Heap, NextFreeEntry, NextSize, FALSE);
|
|
}
|
|
else if (NextInUseEntry)
|
|
{
|
|
NextInUseEntry->PreviousSize = 0;
|
|
}
|
|
}
|
|
|
|
NTSTATUS
|
|
NTAPI
|
|
RtlpInitializeHeapSegment(IN OUT PHEAP Heap,
|
|
OUT PHEAP_SEGMENT Segment,
|
|
IN UCHAR SegmentIndex,
|
|
IN ULONG SegmentFlags,
|
|
IN SIZE_T SegmentReserve,
|
|
IN SIZE_T SegmentCommit)
|
|
{
|
|
PHEAP_ENTRY HeapEntry;
|
|
|
|
/* Preconditions */
|
|
ASSERT(Heap != NULL);
|
|
ASSERT(Segment != NULL);
|
|
ASSERT(SegmentCommit >= PAGE_SIZE);
|
|
ASSERT(ROUND_DOWN(SegmentCommit, PAGE_SIZE) == SegmentCommit);
|
|
ASSERT(SegmentReserve >= SegmentCommit);
|
|
ASSERT(ROUND_DOWN(SegmentReserve, PAGE_SIZE) == SegmentReserve);
|
|
|
|
DPRINT("RtlpInitializeHeapSegment(%p %p %x %x %lx %lx)\n", Heap, Segment, SegmentIndex, SegmentFlags, SegmentReserve, SegmentCommit);
|
|
|
|
/* Initialise the Heap Entry header if this is not the first Heap Segment */
|
|
if ((PHEAP_SEGMENT) (Heap) != Segment)
|
|
{
|
|
Segment->Entry.Size = ROUND_UP(sizeof(HEAP_SEGMENT), sizeof(HEAP_ENTRY)) >> HEAP_ENTRY_SHIFT;
|
|
Segment->Entry.Flags = HEAP_ENTRY_BUSY;
|
|
Segment->Entry.SmallTagIndex = LOBYTE(Segment->Entry.Size) ^ HIBYTE(Segment->Entry.Size) ^ Segment->Entry.Flags;
|
|
Segment->Entry.PreviousSize = 0;
|
|
Segment->Entry.SegmentOffset = SegmentIndex;
|
|
Segment->Entry.UnusedBytes = 0;
|
|
}
|
|
|
|
/* Sanity check */
|
|
ASSERT((Segment->Entry.Size << HEAP_ENTRY_SHIFT) <= PAGE_SIZE);
|
|
|
|
/* Initialise the Heap Segment header */
|
|
Segment->SegmentSignature = HEAP_SEGMENT_SIGNATURE;
|
|
Segment->SegmentFlags = SegmentFlags;
|
|
Segment->Heap = Heap;
|
|
Heap->Segments[SegmentIndex] = Segment;
|
|
|
|
/* Initialise the Heap Segment location information */
|
|
Segment->BaseAddress = Segment;
|
|
Segment->NumberOfPages = (ULONG)(SegmentReserve >> PAGE_SHIFT);
|
|
|
|
/* Initialise the Heap Entries contained within the Heap Segment */
|
|
Segment->FirstEntry = &Segment->Entry + Segment->Entry.Size;
|
|
Segment->LastValidEntry = (PHEAP_ENTRY)((ULONG_PTR)Segment + SegmentReserve);
|
|
|
|
if (((SIZE_T)Segment->Entry.Size << HEAP_ENTRY_SHIFT) < SegmentCommit)
|
|
{
|
|
HeapEntry = Segment->FirstEntry;
|
|
|
|
/* Prepare a Free Heap Entry header */
|
|
HeapEntry->Flags = HEAP_ENTRY_LAST_ENTRY;
|
|
HeapEntry->PreviousSize = Segment->Entry.Size;
|
|
HeapEntry->SegmentOffset = SegmentIndex;
|
|
|
|
/* Register the Free Heap Entry */
|
|
RtlpInsertFreeBlock(Heap, (PHEAP_FREE_ENTRY) HeapEntry, (SegmentCommit >> HEAP_ENTRY_SHIFT) - Segment->Entry.Size);
|
|
}
|
|
|
|
/* Initialise the Heap Segment UnCommitted Range information */
|
|
Segment->NumberOfUnCommittedPages = (ULONG)((SegmentReserve - SegmentCommit) >> PAGE_SHIFT);
|
|
Segment->NumberOfUnCommittedRanges = 0;
|
|
InitializeListHead(&Segment->UCRSegmentList);
|
|
|
|
/* Register the UnCommitted Range of the Heap Segment */
|
|
if (Segment->NumberOfUnCommittedPages != 0)
|
|
RtlpInsertUnCommittedPages(Segment, (ULONG_PTR) (Segment) + SegmentCommit, SegmentReserve - SegmentCommit);
|
|
|
|
return STATUS_SUCCESS;
|
|
}
|
|
|
|
VOID NTAPI
|
|
RtlpDestroyHeapSegment(PHEAP_SEGMENT Segment)
|
|
{
|
|
NTSTATUS Status;
|
|
PVOID BaseAddress;
|
|
SIZE_T Size = 0;
|
|
|
|
/* Make sure it's not user allocated */
|
|
if (Segment->SegmentFlags & HEAP_USER_ALLOCATED) return;
|
|
|
|
BaseAddress = Segment->BaseAddress;
|
|
DPRINT("Destroying segment %p, BA %p\n", Segment, BaseAddress);
|
|
|
|
/* Release virtual memory */
|
|
Status = ZwFreeVirtualMemory(NtCurrentProcess(),
|
|
&BaseAddress,
|
|
&Size,
|
|
MEM_RELEASE);
|
|
|
|
if (!NT_SUCCESS(Status))
|
|
{
|
|
DPRINT1("HEAP: Failed to release segment's memory with status 0x%08X\n", Status);
|
|
}
|
|
}
|
|
|
|
PHEAP_FREE_ENTRY NTAPI
|
|
RtlpCoalesceHeap(PHEAP Heap)
|
|
{
|
|
UNIMPLEMENTED;
|
|
return NULL;
|
|
}
|
|
|
|
PHEAP_FREE_ENTRY NTAPI
|
|
RtlpCoalesceFreeBlocks (PHEAP Heap,
|
|
PHEAP_FREE_ENTRY FreeEntry,
|
|
PSIZE_T FreeSize,
|
|
BOOLEAN Remove)
|
|
{
|
|
PHEAP_FREE_ENTRY CurrentEntry, NextEntry;
|
|
|
|
/* Get the previous entry */
|
|
CurrentEntry = (PHEAP_FREE_ENTRY)((PHEAP_ENTRY)FreeEntry - FreeEntry->PreviousSize);
|
|
|
|
/* Check it */
|
|
if (CurrentEntry != FreeEntry &&
|
|
!(CurrentEntry->Flags & HEAP_ENTRY_BUSY) &&
|
|
(*FreeSize + CurrentEntry->Size) <= HEAP_MAX_BLOCK_SIZE)
|
|
{
|
|
ASSERT(FreeEntry->PreviousSize == CurrentEntry->Size);
|
|
|
|
/* Remove it if asked for */
|
|
if (Remove)
|
|
{
|
|
RtlpRemoveFreeBlock(Heap, FreeEntry, FALSE, FALSE);
|
|
Heap->TotalFreeSize -= FreeEntry->Size;
|
|
|
|
/* Remove it only once! */
|
|
Remove = FALSE;
|
|
}
|
|
|
|
/* Remove previous entry too */
|
|
RtlpRemoveFreeBlock(Heap, CurrentEntry, FALSE, FALSE);
|
|
|
|
/* Copy flags */
|
|
CurrentEntry->Flags = FreeEntry->Flags & HEAP_ENTRY_LAST_ENTRY;
|
|
|
|
/* Advance FreeEntry and update sizes */
|
|
FreeEntry = CurrentEntry;
|
|
*FreeSize = *FreeSize + CurrentEntry->Size;
|
|
Heap->TotalFreeSize -= CurrentEntry->Size;
|
|
FreeEntry->Size = (USHORT)(*FreeSize);
|
|
|
|
/* Also update previous size if needed */
|
|
if (!(FreeEntry->Flags & HEAP_ENTRY_LAST_ENTRY))
|
|
{
|
|
((PHEAP_ENTRY)FreeEntry + *FreeSize)->PreviousSize = (USHORT)(*FreeSize);
|
|
}
|
|
}
|
|
|
|
/* Check the next block if it exists */
|
|
if (!(FreeEntry->Flags & HEAP_ENTRY_LAST_ENTRY))
|
|
{
|
|
NextEntry = (PHEAP_FREE_ENTRY)((PHEAP_ENTRY)FreeEntry + *FreeSize);
|
|
|
|
if (!(NextEntry->Flags & HEAP_ENTRY_BUSY) &&
|
|
NextEntry->Size + *FreeSize <= HEAP_MAX_BLOCK_SIZE)
|
|
{
|
|
ASSERT(*FreeSize == NextEntry->PreviousSize);
|
|
|
|
/* Remove it if asked for */
|
|
if (Remove)
|
|
{
|
|
RtlpRemoveFreeBlock(Heap, FreeEntry, FALSE, FALSE);
|
|
Heap->TotalFreeSize -= FreeEntry->Size;
|
|
}
|
|
|
|
/* Copy flags */
|
|
FreeEntry->Flags = NextEntry->Flags & HEAP_ENTRY_LAST_ENTRY;
|
|
|
|
/* Remove next entry now */
|
|
RtlpRemoveFreeBlock(Heap, NextEntry, FALSE, FALSE);
|
|
|
|
/* Update sizes */
|
|
*FreeSize = *FreeSize + NextEntry->Size;
|
|
Heap->TotalFreeSize -= NextEntry->Size;
|
|
FreeEntry->Size = (USHORT)(*FreeSize);
|
|
|
|
/* Also update previous size if needed */
|
|
if (!(FreeEntry->Flags & HEAP_ENTRY_LAST_ENTRY))
|
|
{
|
|
((PHEAP_ENTRY)FreeEntry + *FreeSize)->PreviousSize = (USHORT)(*FreeSize);
|
|
}
|
|
}
|
|
}
|
|
return FreeEntry;
|
|
}
|
|
|
|
PHEAP_FREE_ENTRY NTAPI
|
|
RtlpExtendHeap(PHEAP Heap,
|
|
SIZE_T Size)
|
|
{
|
|
ULONG Pages;
|
|
UCHAR Index, EmptyIndex;
|
|
SIZE_T FreeSize, CommitSize, ReserveSize;
|
|
PHEAP_SEGMENT Segment;
|
|
PHEAP_FREE_ENTRY FreeEntry;
|
|
NTSTATUS Status;
|
|
|
|
DPRINT("RtlpExtendHeap(%p %x)\n", Heap, Size);
|
|
|
|
/* Calculate amount in pages */
|
|
Pages = (ULONG)((Size + PAGE_SIZE - 1) / PAGE_SIZE);
|
|
FreeSize = Pages * PAGE_SIZE;
|
|
DPRINT("Pages %x, FreeSize %x. Going through segments...\n", Pages, FreeSize);
|
|
|
|
/* Find an empty segment */
|
|
EmptyIndex = HEAP_SEGMENTS;
|
|
for (Index = 0; Index < HEAP_SEGMENTS; Index++)
|
|
{
|
|
Segment = Heap->Segments[Index];
|
|
|
|
if (Segment) DPRINT("Segment[%u] %p with NOUCP %x\n", Index, Segment, Segment->NumberOfUnCommittedPages);
|
|
|
|
/* Check if its size suits us */
|
|
if (Segment &&
|
|
Pages <= Segment->NumberOfUnCommittedPages)
|
|
{
|
|
DPRINT("This segment is suitable\n");
|
|
|
|
/* Commit needed amount */
|
|
FreeEntry = RtlpFindAndCommitPages(Heap, Segment, &FreeSize, NULL);
|
|
|
|
/* Coalesce it with adjacent entries */
|
|
if (FreeEntry)
|
|
{
|
|
FreeSize = FreeSize >> HEAP_ENTRY_SHIFT;
|
|
FreeEntry = RtlpCoalesceFreeBlocks(Heap, FreeEntry, &FreeSize, FALSE);
|
|
RtlpInsertFreeBlock(Heap, FreeEntry, FreeSize);
|
|
return FreeEntry;
|
|
}
|
|
}
|
|
else if (!Segment &&
|
|
EmptyIndex == HEAP_SEGMENTS)
|
|
{
|
|
/* Remember the first unused segment index */
|
|
EmptyIndex = Index;
|
|
}
|
|
}
|
|
|
|
/* No luck, need to grow the heap */
|
|
if ((Heap->Flags & HEAP_GROWABLE) &&
|
|
(EmptyIndex != HEAP_SEGMENTS))
|
|
{
|
|
Segment = NULL;
|
|
|
|
/* Reserve the memory */
|
|
if ((Size + PAGE_SIZE) <= Heap->SegmentReserve)
|
|
ReserveSize = Heap->SegmentReserve;
|
|
else
|
|
ReserveSize = Size + PAGE_SIZE;
|
|
|
|
Status = ZwAllocateVirtualMemory(NtCurrentProcess(),
|
|
(PVOID)&Segment,
|
|
0,
|
|
&ReserveSize,
|
|
MEM_RESERVE,
|
|
PAGE_READWRITE);
|
|
|
|
/* If it failed, retry again with a half division algorithm */
|
|
while (!NT_SUCCESS(Status) &&
|
|
ReserveSize != Size + PAGE_SIZE)
|
|
{
|
|
ReserveSize /= 2;
|
|
|
|
if (ReserveSize < (Size + PAGE_SIZE))
|
|
ReserveSize = Size + PAGE_SIZE;
|
|
|
|
Status = ZwAllocateVirtualMemory(NtCurrentProcess(),
|
|
(PVOID)&Segment,
|
|
0,
|
|
&ReserveSize,
|
|
MEM_RESERVE,
|
|
PAGE_READWRITE);
|
|
}
|
|
|
|
/* Proceed only if it's success */
|
|
if (NT_SUCCESS(Status))
|
|
{
|
|
Heap->SegmentReserve += ReserveSize;
|
|
|
|
/* Now commit the memory */
|
|
if ((Size + PAGE_SIZE) <= Heap->SegmentCommit)
|
|
CommitSize = Heap->SegmentCommit;
|
|
else
|
|
CommitSize = Size + PAGE_SIZE;
|
|
|
|
Status = ZwAllocateVirtualMemory(NtCurrentProcess(),
|
|
(PVOID)&Segment,
|
|
0,
|
|
&CommitSize,
|
|
MEM_COMMIT,
|
|
PAGE_READWRITE);
|
|
|
|
DPRINT("Committed %lu bytes at base %p\n", CommitSize, Segment);
|
|
|
|
/* Initialize heap segment if commit was successful */
|
|
if (NT_SUCCESS(Status))
|
|
Status = RtlpInitializeHeapSegment(Heap, Segment, EmptyIndex, 0, ReserveSize, CommitSize);
|
|
|
|
/* If everything worked - cool */
|
|
if (NT_SUCCESS(Status)) return (PHEAP_FREE_ENTRY)Segment->FirstEntry;
|
|
|
|
DPRINT1("Committing failed with status 0x%08X\n", Status);
|
|
|
|
/* Nope, we failed. Free memory */
|
|
ZwFreeVirtualMemory(NtCurrentProcess(),
|
|
(PVOID)&Segment,
|
|
&ReserveSize,
|
|
MEM_RELEASE);
|
|
}
|
|
else
|
|
{
|
|
DPRINT1("Reserving failed with status 0x%08X\n", Status);
|
|
}
|
|
}
|
|
|
|
if (RtlpGetMode() == UserMode)
|
|
{
|
|
/* If coalescing on free is disabled in usermode, then do it here */
|
|
if (Heap->Flags & HEAP_DISABLE_COALESCE_ON_FREE)
|
|
{
|
|
FreeEntry = RtlpCoalesceHeap(Heap);
|
|
|
|
/* If it's a suitable one - return it */
|
|
if (FreeEntry &&
|
|
FreeEntry->Size >= Size)
|
|
{
|
|
return FreeEntry;
|
|
}
|
|
}
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
/***********************************************************************
|
|
* RtlCreateHeap
|
|
* RETURNS
|
|
* Handle of heap: Success
|
|
* NULL: Failure
|
|
*
|
|
* @implemented
|
|
*/
|
|
HANDLE NTAPI
|
|
RtlCreateHeap(ULONG Flags,
|
|
PVOID Addr,
|
|
SIZE_T TotalSize,
|
|
SIZE_T CommitSize,
|
|
PVOID Lock,
|
|
PRTL_HEAP_PARAMETERS Parameters)
|
|
{
|
|
PVOID CommittedAddress = NULL, UncommittedAddress = NULL;
|
|
PHEAP Heap = NULL;
|
|
RTL_HEAP_PARAMETERS SafeParams = {0};
|
|
ULONG_PTR MaximumUserModeAddress;
|
|
SYSTEM_BASIC_INFORMATION SystemInformation;
|
|
MEMORY_BASIC_INFORMATION MemoryInfo;
|
|
ULONG NtGlobalFlags = RtlGetNtGlobalFlags();
|
|
ULONG HeapSegmentFlags = 0;
|
|
NTSTATUS Status;
|
|
ULONG MaxBlockSize;
|
|
|
|
/* Check for a special heap */
|
|
if (RtlpPageHeapEnabled && !Addr && !Lock)
|
|
{
|
|
Heap = RtlpPageHeapCreate(Flags, Addr, TotalSize, CommitSize, Lock, Parameters);
|
|
if (Heap) return Heap;
|
|
|
|
/* Reset a special Parameters == -1 hack */
|
|
if ((ULONG_PTR)Parameters == (ULONG_PTR)-1)
|
|
Parameters = NULL;
|
|
else
|
|
DPRINT1("Enabling page heap failed\n");
|
|
}
|
|
|
|
/* Check validation flags */
|
|
if (!(Flags & HEAP_SKIP_VALIDATION_CHECKS) && (Flags & ~HEAP_CREATE_VALID_MASK))
|
|
{
|
|
DPRINT1("Invalid flags 0x%08x, fixing...\n", Flags);
|
|
Flags &= HEAP_CREATE_VALID_MASK;
|
|
}
|
|
|
|
/* TODO: Capture parameters, once we decide to use SEH */
|
|
if (!Parameters) Parameters = &SafeParams;
|
|
|
|
/* Check global flags */
|
|
if (NtGlobalFlags & FLG_HEAP_DISABLE_COALESCING)
|
|
Flags |= HEAP_DISABLE_COALESCE_ON_FREE;
|
|
|
|
if (NtGlobalFlags & FLG_HEAP_ENABLE_FREE_CHECK)
|
|
Flags |= HEAP_FREE_CHECKING_ENABLED;
|
|
|
|
if (NtGlobalFlags & FLG_HEAP_ENABLE_TAIL_CHECK)
|
|
Flags |= HEAP_TAIL_CHECKING_ENABLED;
|
|
|
|
if (RtlpGetMode() == UserMode)
|
|
{
|
|
/* Also check these flags if in usermode */
|
|
if (NtGlobalFlags & FLG_HEAP_VALIDATE_ALL)
|
|
Flags |= HEAP_VALIDATE_ALL_ENABLED;
|
|
|
|
if (NtGlobalFlags & FLG_HEAP_VALIDATE_PARAMETERS)
|
|
Flags |= HEAP_VALIDATE_PARAMETERS_ENABLED;
|
|
|
|
if (NtGlobalFlags & FLG_USER_STACK_TRACE_DB)
|
|
Flags |= HEAP_CAPTURE_STACK_BACKTRACES;
|
|
}
|
|
|
|
/* Set tunable parameters */
|
|
RtlpSetHeapParameters(Parameters);
|
|
|
|
/* Get the max um address */
|
|
Status = ZwQuerySystemInformation(SystemBasicInformation,
|
|
&SystemInformation,
|
|
sizeof(SystemInformation),
|
|
NULL);
|
|
|
|
if (!NT_SUCCESS(Status))
|
|
{
|
|
DPRINT1("Getting max usermode address failed with status 0x%08x\n", Status);
|
|
return NULL;
|
|
}
|
|
|
|
MaximumUserModeAddress = SystemInformation.MaximumUserModeAddress;
|
|
|
|
/* Calculate max alloc size */
|
|
if (!Parameters->MaximumAllocationSize)
|
|
Parameters->MaximumAllocationSize = MaximumUserModeAddress - (ULONG_PTR)0x10000 - PAGE_SIZE;
|
|
|
|
MaxBlockSize = 0x80000 - PAGE_SIZE;
|
|
|
|
if (!Parameters->VirtualMemoryThreshold ||
|
|
Parameters->VirtualMemoryThreshold > MaxBlockSize)
|
|
{
|
|
Parameters->VirtualMemoryThreshold = MaxBlockSize;
|
|
}
|
|
|
|
/* Check reserve/commit sizes and set default values */
|
|
if (!CommitSize)
|
|
{
|
|
CommitSize = PAGE_SIZE;
|
|
if (TotalSize)
|
|
TotalSize = ROUND_UP(TotalSize, PAGE_SIZE);
|
|
else
|
|
TotalSize = 64 * PAGE_SIZE;
|
|
}
|
|
else
|
|
{
|
|
/* Round up the commit size to be at least the page size */
|
|
CommitSize = ROUND_UP(CommitSize, PAGE_SIZE);
|
|
|
|
if (TotalSize)
|
|
TotalSize = ROUND_UP(TotalSize, PAGE_SIZE);
|
|
else
|
|
TotalSize = ROUND_UP(CommitSize, 16 * PAGE_SIZE);
|
|
}
|
|
|
|
/* Call special heap */
|
|
if (RtlpHeapIsSpecial(Flags))
|
|
return RtlDebugCreateHeap(Flags, Addr, TotalSize, CommitSize, Lock, Parameters);
|
|
|
|
/* Without serialization, a lock makes no sense */
|
|
if ((Flags & HEAP_NO_SERIALIZE) && (Lock != NULL))
|
|
return NULL;
|
|
|
|
/* See if we are already provided with an address for the heap */
|
|
if (Addr)
|
|
{
|
|
if (Parameters->CommitRoutine)
|
|
{
|
|
/* There is a commit routine, so no problem here, check params */
|
|
if ((Flags & HEAP_GROWABLE) ||
|
|
!Parameters->InitialCommit ||
|
|
!Parameters->InitialReserve ||
|
|
(Parameters->InitialCommit > Parameters->InitialReserve))
|
|
{
|
|
/* Fail */
|
|
return NULL;
|
|
}
|
|
|
|
/* Calculate committed and uncommitted addresses */
|
|
CommittedAddress = Addr;
|
|
UncommittedAddress = (PCHAR)Addr + Parameters->InitialCommit;
|
|
TotalSize = Parameters->InitialReserve;
|
|
|
|
/* Zero the initial page ourselves */
|
|
RtlZeroMemory(CommittedAddress, PAGE_SIZE);
|
|
}
|
|
else
|
|
{
|
|
/* Commit routine is absent, so query how much memory caller reserved */
|
|
Status = ZwQueryVirtualMemory(NtCurrentProcess(),
|
|
Addr,
|
|
MemoryBasicInformation,
|
|
&MemoryInfo,
|
|
sizeof(MemoryInfo),
|
|
NULL);
|
|
|
|
if (!NT_SUCCESS(Status))
|
|
{
|
|
DPRINT1("Querying amount of user supplied memory failed with status 0x%08X\n", Status);
|
|
return NULL;
|
|
}
|
|
|
|
/* Validate it */
|
|
if (MemoryInfo.BaseAddress != Addr ||
|
|
MemoryInfo.State == MEM_FREE)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
/* Validation checks passed, set committed/uncommitted addresses */
|
|
CommittedAddress = Addr;
|
|
|
|
/* Check if it's committed or not */
|
|
if (MemoryInfo.State == MEM_COMMIT)
|
|
{
|
|
/* Zero it out because it's already committed */
|
|
RtlZeroMemory(CommittedAddress, PAGE_SIZE);
|
|
|
|
/* Calculate uncommitted address value */
|
|
CommitSize = MemoryInfo.RegionSize;
|
|
TotalSize = CommitSize;
|
|
UncommittedAddress = (PCHAR)Addr + CommitSize;
|
|
|
|
/* Check if uncommitted address is reserved */
|
|
Status = ZwQueryVirtualMemory(NtCurrentProcess(),
|
|
UncommittedAddress,
|
|
MemoryBasicInformation,
|
|
&MemoryInfo,
|
|
sizeof(MemoryInfo),
|
|
NULL);
|
|
|
|
if (NT_SUCCESS(Status) &&
|
|
MemoryInfo.State == MEM_RESERVE)
|
|
{
|
|
/* It is, so add it up to the reserve size */
|
|
TotalSize += MemoryInfo.RegionSize;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/* It's not committed, inform following code that a commit is necessary */
|
|
CommitSize = PAGE_SIZE;
|
|
UncommittedAddress = Addr;
|
|
}
|
|
}
|
|
|
|
/* Mark this as a user-committed mem */
|
|
HeapSegmentFlags = HEAP_USER_ALLOCATED;
|
|
Heap = (PHEAP)Addr;
|
|
}
|
|
else
|
|
{
|
|
/* Check commit routine */
|
|
if (Parameters->CommitRoutine) return NULL;
|
|
|
|
/* Reserve memory */
|
|
Status = ZwAllocateVirtualMemory(NtCurrentProcess(),
|
|
(PVOID *)&Heap,
|
|
0,
|
|
&TotalSize,
|
|
MEM_RESERVE,
|
|
PAGE_READWRITE);
|
|
|
|
if (!NT_SUCCESS(Status))
|
|
{
|
|
DPRINT1("Failed to reserve memory with status 0x%08x\n", Status);
|
|
return NULL;
|
|
}
|
|
|
|
/* Set base addresses */
|
|
CommittedAddress = Heap;
|
|
UncommittedAddress = Heap;
|
|
}
|
|
|
|
/* Check if we need to commit something */
|
|
if (CommittedAddress == UncommittedAddress)
|
|
{
|
|
/* Commit the required size */
|
|
Status = ZwAllocateVirtualMemory(NtCurrentProcess(),
|
|
&CommittedAddress,
|
|
0,
|
|
&CommitSize,
|
|
MEM_COMMIT,
|
|
PAGE_READWRITE);
|
|
|
|
DPRINT("Committed %Iu bytes at base %p\n", CommitSize, CommittedAddress);
|
|
|
|
if (!NT_SUCCESS(Status))
|
|
{
|
|
DPRINT1("Failure, Status 0x%08X\n", Status);
|
|
|
|
/* Release memory if it was reserved */
|
|
if (!Addr) ZwFreeVirtualMemory(NtCurrentProcess(),
|
|
(PVOID *)&Heap,
|
|
&TotalSize,
|
|
MEM_RELEASE);
|
|
|
|
return NULL;
|
|
}
|
|
|
|
/* Calculate new uncommitted address */
|
|
UncommittedAddress = (PCHAR)UncommittedAddress + CommitSize;
|
|
}
|
|
|
|
/* Initialize the heap */
|
|
Status = RtlpInitializeHeap(Heap, Flags, Lock, Parameters);
|
|
if (!NT_SUCCESS(Status))
|
|
{
|
|
DPRINT1("Failed to initialize heap (%x)\n", Status);
|
|
return NULL;
|
|
}
|
|
|
|
/* Initialize heap's first segment */
|
|
Status = RtlpInitializeHeapSegment(Heap, (PHEAP_SEGMENT) (Heap), 0, HeapSegmentFlags, TotalSize, CommitSize);
|
|
if (!NT_SUCCESS(Status))
|
|
{
|
|
DPRINT1("Failed to initialize heap segment (%x)\n", Status);
|
|
return NULL;
|
|
}
|
|
|
|
DPRINT("Created heap %p, CommitSize %x, ReserveSize %x\n", Heap, CommitSize, TotalSize);
|
|
|
|
/* Add heap to process list in case of usermode heap */
|
|
if (RtlpGetMode() == UserMode)
|
|
{
|
|
RtlpAddHeapToProcessList(Heap);
|
|
|
|
// FIXME: What about lookasides?
|
|
}
|
|
|
|
return Heap;
|
|
}
|
|
|
|
/***********************************************************************
|
|
* RtlDestroyHeap
|
|
* RETURNS
|
|
* TRUE: Success
|
|
* FALSE: Failure
|
|
*
|
|
* @implemented
|
|
*
|
|
* RETURNS
|
|
* Success: A NULL HANDLE, if heap is NULL or it was destroyed
|
|
* Failure: The Heap handle, if heap is the process heap.
|
|
*/
|
|
HANDLE NTAPI
|
|
RtlDestroyHeap(HANDLE HeapPtr) /* [in] Handle of heap */
|
|
{
|
|
PHEAP Heap = (PHEAP)HeapPtr;
|
|
PLIST_ENTRY Current;
|
|
PHEAP_UCR_SEGMENT UcrSegment;
|
|
PHEAP_VIRTUAL_ALLOC_ENTRY VirtualEntry;
|
|
PVOID BaseAddress;
|
|
SIZE_T Size;
|
|
LONG i;
|
|
PHEAP_SEGMENT Segment;
|
|
|
|
if (!HeapPtr) return NULL;
|
|
|
|
/* Call page heap routine if required */
|
|
if (Heap->ForceFlags & HEAP_FLAG_PAGE_ALLOCS) return RtlpPageHeapDestroy(HeapPtr);
|
|
|
|
/* Call special heap */
|
|
if (RtlpHeapIsSpecial(Heap->Flags))
|
|
{
|
|
if (!RtlDebugDestroyHeap(Heap)) return HeapPtr;
|
|
}
|
|
|
|
/* Check for a process heap */
|
|
if (RtlpGetMode() == UserMode &&
|
|
HeapPtr == NtCurrentPeb()->ProcessHeap) return HeapPtr;
|
|
|
|
/* Free up all big allocations */
|
|
Current = Heap->VirtualAllocdBlocks.Flink;
|
|
while (Current != &Heap->VirtualAllocdBlocks)
|
|
{
|
|
VirtualEntry = CONTAINING_RECORD(Current, HEAP_VIRTUAL_ALLOC_ENTRY, Entry);
|
|
BaseAddress = (PVOID)VirtualEntry;
|
|
Current = Current->Flink;
|
|
Size = 0;
|
|
ZwFreeVirtualMemory(NtCurrentProcess(),
|
|
&BaseAddress,
|
|
&Size,
|
|
MEM_RELEASE);
|
|
}
|
|
|
|
/* Delete tags and remove heap from the process heaps list in user mode */
|
|
if (RtlpGetMode() == UserMode)
|
|
{
|
|
// FIXME DestroyTags
|
|
RtlpRemoveHeapFromProcessList(Heap);
|
|
}
|
|
|
|
/* Delete the heap lock */
|
|
if (!(Heap->Flags & HEAP_NO_SERIALIZE))
|
|
{
|
|
/* Delete it if it wasn't user allocated */
|
|
if (!(Heap->Flags & HEAP_LOCK_USER_ALLOCATED))
|
|
RtlDeleteHeapLock(Heap->LockVariable);
|
|
|
|
/* Clear out the lock variable */
|
|
Heap->LockVariable = NULL;
|
|
}
|
|
|
|
/* Free UCR segments if any were created */
|
|
Current = Heap->UCRSegments.Flink;
|
|
while (Current != &Heap->UCRSegments)
|
|
{
|
|
UcrSegment = CONTAINING_RECORD(Current, HEAP_UCR_SEGMENT, ListEntry);
|
|
|
|
/* Advance to the next descriptor */
|
|
Current = Current->Flink;
|
|
|
|
BaseAddress = (PVOID)UcrSegment;
|
|
Size = 0;
|
|
|
|
/* Release that memory */
|
|
ZwFreeVirtualMemory(NtCurrentProcess(),
|
|
&BaseAddress,
|
|
&Size,
|
|
MEM_RELEASE);
|
|
}
|
|
|
|
/* Go through segments and destroy them */
|
|
for (i = HEAP_SEGMENTS - 1; i >= 0; i--)
|
|
{
|
|
Segment = Heap->Segments[i];
|
|
if (Segment) RtlpDestroyHeapSegment(Segment);
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
PHEAP_ENTRY NTAPI
|
|
RtlpSplitEntry(PHEAP Heap,
|
|
ULONG Flags,
|
|
PHEAP_FREE_ENTRY FreeBlock,
|
|
SIZE_T AllocationSize,
|
|
SIZE_T Index,
|
|
SIZE_T Size)
|
|
{
|
|
PHEAP_FREE_ENTRY SplitBlock, SplitBlock2;
|
|
UCHAR FreeFlags, EntryFlags = HEAP_ENTRY_BUSY;
|
|
PHEAP_ENTRY InUseEntry;
|
|
SIZE_T FreeSize;
|
|
|
|
/* Add extra flags in case of settable user value feature is requested,
|
|
or there is a tag (small or normal) or there is a request to
|
|
capture stack backtraces */
|
|
if ((Flags & HEAP_EXTRA_FLAGS_MASK) ||
|
|
Heap->PseudoTagEntries)
|
|
{
|
|
/* Add flag which means that the entry will have extra stuff attached */
|
|
EntryFlags |= HEAP_ENTRY_EXTRA_PRESENT;
|
|
|
|
/* NB! AllocationSize is already adjusted by RtlAllocateHeap */
|
|
}
|
|
|
|
/* Add settable user flags, if any */
|
|
EntryFlags |= (Flags & HEAP_SETTABLE_USER_FLAGS) >> 4;
|
|
|
|
/* Save flags, update total free size */
|
|
FreeFlags = FreeBlock->Flags;
|
|
Heap->TotalFreeSize -= FreeBlock->Size;
|
|
|
|
/* Make this block an in-use one */
|
|
InUseEntry = (PHEAP_ENTRY)FreeBlock;
|
|
InUseEntry->Flags = EntryFlags;
|
|
InUseEntry->SmallTagIndex = 0;
|
|
|
|
/* Calculate the extra amount */
|
|
FreeSize = InUseEntry->Size - Index;
|
|
|
|
/* Update it's size fields (we don't need their data anymore) */
|
|
InUseEntry->Size = (USHORT)Index;
|
|
InUseEntry->UnusedBytes = (UCHAR)(AllocationSize - Size);
|
|
|
|
/* If there is something to split - do the split */
|
|
if (FreeSize != 0)
|
|
{
|
|
/* Don't split if resulting entry can't contain any payload data
|
|
(i.e. being just HEAP_ENTRY_SIZE) */
|
|
if (FreeSize == 1)
|
|
{
|
|
/* Increase sizes of the in-use entry */
|
|
InUseEntry->Size++;
|
|
InUseEntry->UnusedBytes += sizeof(HEAP_ENTRY);
|
|
}
|
|
else
|
|
{
|
|
/* Calculate a pointer to the new entry */
|
|
SplitBlock = (PHEAP_FREE_ENTRY)(InUseEntry + Index);
|
|
|
|
/* Initialize it */
|
|
SplitBlock->Flags = FreeFlags;
|
|
SplitBlock->SegmentOffset = InUseEntry->SegmentOffset;
|
|
SplitBlock->Size = (USHORT)FreeSize;
|
|
SplitBlock->PreviousSize = (USHORT)Index;
|
|
|
|
/* Check if it's the last entry */
|
|
if (FreeFlags & HEAP_ENTRY_LAST_ENTRY)
|
|
{
|
|
/* Insert it to the free list if it's the last entry */
|
|
RtlpInsertFreeBlockHelper(Heap, SplitBlock, FreeSize, FALSE);
|
|
Heap->TotalFreeSize += FreeSize;
|
|
}
|
|
else
|
|
{
|
|
/* Not so easy - need to update next's previous size too */
|
|
SplitBlock2 = (PHEAP_FREE_ENTRY)((PHEAP_ENTRY)SplitBlock + FreeSize);
|
|
|
|
if (SplitBlock2->Flags & HEAP_ENTRY_BUSY)
|
|
{
|
|
SplitBlock2->PreviousSize = (USHORT)FreeSize;
|
|
RtlpInsertFreeBlockHelper(Heap, SplitBlock, FreeSize, FALSE);
|
|
Heap->TotalFreeSize += FreeSize;
|
|
}
|
|
else
|
|
{
|
|
/* Even more complex - the next entry is free, so we can merge them into one! */
|
|
SplitBlock->Flags = SplitBlock2->Flags;
|
|
|
|
/* Remove that next entry */
|
|
RtlpRemoveFreeBlock(Heap, SplitBlock2, FALSE, FALSE);
|
|
|
|
/* Update sizes */
|
|
FreeSize += SplitBlock2->Size;
|
|
Heap->TotalFreeSize -= SplitBlock2->Size;
|
|
|
|
if (FreeSize <= HEAP_MAX_BLOCK_SIZE)
|
|
{
|
|
/* Insert it back */
|
|
SplitBlock->Size = (USHORT)FreeSize;
|
|
|
|
/* Don't forget to update previous size of the next entry! */
|
|
if (!(SplitBlock->Flags & HEAP_ENTRY_LAST_ENTRY))
|
|
{
|
|
((PHEAP_FREE_ENTRY)((PHEAP_ENTRY)SplitBlock + FreeSize))->PreviousSize = (USHORT)FreeSize;
|
|
}
|
|
|
|
/* Actually insert it */
|
|
RtlpInsertFreeBlockHelper(Heap, SplitBlock, (USHORT)FreeSize, FALSE);
|
|
|
|
/* Update total size */
|
|
Heap->TotalFreeSize += FreeSize;
|
|
}
|
|
else
|
|
{
|
|
/* Resulting block is quite big */
|
|
RtlpInsertFreeBlock(Heap, SplitBlock, FreeSize);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Reset flags of the free entry */
|
|
FreeFlags = 0;
|
|
}
|
|
}
|
|
|
|
/* Set last entry flag */
|
|
if (FreeFlags & HEAP_ENTRY_LAST_ENTRY)
|
|
InUseEntry->Flags |= HEAP_ENTRY_LAST_ENTRY;
|
|
|
|
return InUseEntry;
|
|
}
|
|
|
|
PVOID NTAPI
|
|
RtlpAllocateNonDedicated(PHEAP Heap,
|
|
ULONG Flags,
|
|
SIZE_T Size,
|
|
SIZE_T AllocationSize,
|
|
SIZE_T Index,
|
|
BOOLEAN HeapLocked)
|
|
{
|
|
PLIST_ENTRY FreeListHead, Next;
|
|
PHEAP_FREE_ENTRY FreeBlock;
|
|
PHEAP_ENTRY InUseEntry;
|
|
PHEAP_ENTRY_EXTRA Extra;
|
|
EXCEPTION_RECORD ExceptionRecord;
|
|
|
|
/* Go through the zero list to find a place where to insert the new entry */
|
|
FreeListHead = &Heap->FreeLists[0];
|
|
|
|
/* Start from the largest block to reduce time */
|
|
Next = FreeListHead->Blink;
|
|
if (FreeListHead != Next)
|
|
{
|
|
FreeBlock = CONTAINING_RECORD(Next, HEAP_FREE_ENTRY, FreeList);
|
|
|
|
if (FreeBlock->Size >= Index)
|
|
{
|
|
/* Our request is smaller than the largest entry in the zero list */
|
|
|
|
/* Go through the list to find insertion place */
|
|
Next = FreeListHead->Flink;
|
|
while (FreeListHead != Next)
|
|
{
|
|
FreeBlock = CONTAINING_RECORD(Next, HEAP_FREE_ENTRY, FreeList);
|
|
|
|
if (FreeBlock->Size >= Index)
|
|
{
|
|
/* Found minimally fitting entry. Proceed to either using it as it is
|
|
or splitting it to two entries */
|
|
RemoveEntryList(&FreeBlock->FreeList);
|
|
|
|
/* Split it */
|
|
InUseEntry = RtlpSplitEntry(Heap, Flags, FreeBlock, AllocationSize, Index, Size);
|
|
|
|
/* Release the lock */
|
|
if (HeapLocked) RtlLeaveHeapLock(Heap->LockVariable);
|
|
|
|
/* Zero memory if that was requested */
|
|
if (Flags & HEAP_ZERO_MEMORY)
|
|
RtlZeroMemory(InUseEntry + 1, Size);
|
|
else if (Heap->Flags & HEAP_FREE_CHECKING_ENABLED)
|
|
{
|
|
/* Fill this block with a special pattern */
|
|
RtlFillMemoryUlong(InUseEntry + 1, Size & ~0x3, ARENA_INUSE_FILLER);
|
|
}
|
|
|
|
/* Fill tail of the block with a special pattern too if requested */
|
|
if (Heap->Flags & HEAP_TAIL_CHECKING_ENABLED)
|
|
{
|
|
RtlFillMemory((PCHAR)(InUseEntry + 1) + Size, sizeof(HEAP_ENTRY), HEAP_TAIL_FILL);
|
|
InUseEntry->Flags |= HEAP_ENTRY_FILL_PATTERN;
|
|
}
|
|
|
|
/* Prepare extra if it's present */
|
|
if (InUseEntry->Flags & HEAP_ENTRY_EXTRA_PRESENT)
|
|
{
|
|
Extra = RtlpGetExtraStuffPointer(InUseEntry);
|
|
RtlZeroMemory(Extra, sizeof(HEAP_ENTRY_EXTRA));
|
|
|
|
// TODO: Tagging
|
|
}
|
|
|
|
/* Return pointer to the */
|
|
return InUseEntry + 1;
|
|
}
|
|
|
|
/* Advance to the next entry */
|
|
Next = Next->Flink;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Extend the heap, 0 list didn't have anything suitable */
|
|
FreeBlock = RtlpExtendHeap(Heap, AllocationSize);
|
|
|
|
/* Use the new biggest entry we've got */
|
|
if (FreeBlock)
|
|
{
|
|
RemoveEntryList(&FreeBlock->FreeList);
|
|
|
|
/* Split it */
|
|
InUseEntry = RtlpSplitEntry(Heap, Flags, FreeBlock, AllocationSize, Index, Size);
|
|
|
|
/* Release the lock */
|
|
if (HeapLocked) RtlLeaveHeapLock(Heap->LockVariable);
|
|
|
|
/* Zero memory if that was requested */
|
|
if (Flags & HEAP_ZERO_MEMORY)
|
|
RtlZeroMemory(InUseEntry + 1, Size);
|
|
else if (Heap->Flags & HEAP_FREE_CHECKING_ENABLED)
|
|
{
|
|
/* Fill this block with a special pattern */
|
|
RtlFillMemoryUlong(InUseEntry + 1, Size & ~0x3, ARENA_INUSE_FILLER);
|
|
}
|
|
|
|
/* Fill tail of the block with a special pattern too if requested */
|
|
if (Heap->Flags & HEAP_TAIL_CHECKING_ENABLED)
|
|
{
|
|
RtlFillMemory((PCHAR)(InUseEntry + 1) + Size, sizeof(HEAP_ENTRY), HEAP_TAIL_FILL);
|
|
InUseEntry->Flags |= HEAP_ENTRY_FILL_PATTERN;
|
|
}
|
|
|
|
/* Prepare extra if it's present */
|
|
if (InUseEntry->Flags & HEAP_ENTRY_EXTRA_PRESENT)
|
|
{
|
|
Extra = RtlpGetExtraStuffPointer(InUseEntry);
|
|
RtlZeroMemory(Extra, sizeof(HEAP_ENTRY_EXTRA));
|
|
|
|
// TODO: Tagging
|
|
}
|
|
|
|
/* Return pointer to the */
|
|
return InUseEntry + 1;
|
|
}
|
|
|
|
/* Really unfortunate, out of memory condition */
|
|
RtlSetLastWin32ErrorAndNtStatusFromNtStatus(STATUS_NO_MEMORY);
|
|
|
|
/* Generate an exception */
|
|
if (Flags & HEAP_GENERATE_EXCEPTIONS)
|
|
{
|
|
ExceptionRecord.ExceptionCode = STATUS_NO_MEMORY;
|
|
ExceptionRecord.ExceptionRecord = NULL;
|
|
ExceptionRecord.NumberParameters = 1;
|
|
ExceptionRecord.ExceptionFlags = 0;
|
|
ExceptionRecord.ExceptionInformation[0] = AllocationSize;
|
|
|
|
RtlRaiseException(&ExceptionRecord);
|
|
}
|
|
|
|
/* Release the lock */
|
|
if (HeapLocked) RtlLeaveHeapLock(Heap->LockVariable);
|
|
DPRINT1("HEAP: Allocation failed!\n");
|
|
DPRINT1("Flags %x\n", Heap->Flags);
|
|
return NULL;
|
|
}
|
|
|
|
/***********************************************************************
|
|
* HeapAlloc (KERNEL32.334)
|
|
* RETURNS
|
|
* Pointer to allocated memory block
|
|
* NULL: Failure
|
|
* 0x7d030f60--invalid flags in RtlHeapAllocate
|
|
* @implemented
|
|
*/
|
|
PVOID NTAPI
|
|
RtlAllocateHeap(IN PVOID HeapPtr,
|
|
IN ULONG Flags,
|
|
IN SIZE_T Size)
|
|
{
|
|
PHEAP Heap = (PHEAP)HeapPtr;
|
|
PULONG FreeListsInUse;
|
|
ULONG FreeListsInUseUlong;
|
|
SIZE_T AllocationSize;
|
|
SIZE_T Index, InUseIndex, i;
|
|
PLIST_ENTRY FreeListHead;
|
|
PHEAP_ENTRY InUseEntry;
|
|
PHEAP_FREE_ENTRY FreeBlock;
|
|
UCHAR FreeFlags, EntryFlags = HEAP_ENTRY_BUSY;
|
|
EXCEPTION_RECORD ExceptionRecord;
|
|
BOOLEAN HeapLocked = FALSE;
|
|
PHEAP_VIRTUAL_ALLOC_ENTRY VirtualBlock = NULL;
|
|
PHEAP_ENTRY_EXTRA Extra;
|
|
NTSTATUS Status;
|
|
|
|
/* Force flags */
|
|
Flags |= Heap->ForceFlags;
|
|
|
|
/* Call special heap */
|
|
if (RtlpHeapIsSpecial(Flags))
|
|
return RtlDebugAllocateHeap(Heap, Flags, Size);
|
|
|
|
/* Check for the maximum size */
|
|
if (Size >= 0x80000000)
|
|
{
|
|
RtlSetLastWin32ErrorAndNtStatusFromNtStatus(STATUS_NO_MEMORY);
|
|
DPRINT1("HEAP: Allocation failed!\n");
|
|
return NULL;
|
|
}
|
|
|
|
if (Flags & (HEAP_CREATE_ENABLE_TRACING |
|
|
HEAP_CREATE_ALIGN_16))
|
|
{
|
|
DPRINT1("HEAP: RtlAllocateHeap is called with unsupported flags %x, ignoring\n", Flags);
|
|
}
|
|
|
|
//DPRINT("RtlAllocateHeap(%p %x %x)\n", Heap, Flags, Size);
|
|
|
|
/* Calculate allocation size and index */
|
|
if (Size)
|
|
AllocationSize = Size;
|
|
else
|
|
AllocationSize = 1;
|
|
AllocationSize = (AllocationSize + Heap->AlignRound) & Heap->AlignMask;
|
|
|
|
/* Add extra flags in case of settable user value feature is requested,
|
|
or there is a tag (small or normal) or there is a request to
|
|
capture stack backtraces */
|
|
if ((Flags & HEAP_EXTRA_FLAGS_MASK) ||
|
|
Heap->PseudoTagEntries)
|
|
{
|
|
/* Add flag which means that the entry will have extra stuff attached */
|
|
EntryFlags |= HEAP_ENTRY_EXTRA_PRESENT;
|
|
|
|
/* Account for extra stuff size */
|
|
AllocationSize += sizeof(HEAP_ENTRY_EXTRA);
|
|
}
|
|
|
|
/* Add settable user flags, if any */
|
|
EntryFlags |= (Flags & HEAP_SETTABLE_USER_FLAGS) >> 4;
|
|
|
|
Index = AllocationSize >> HEAP_ENTRY_SHIFT;
|
|
|
|
/* Acquire the lock if necessary */
|
|
if (!(Flags & HEAP_NO_SERIALIZE))
|
|
{
|
|
RtlEnterHeapLock(Heap->LockVariable, TRUE);
|
|
HeapLocked = TRUE;
|
|
}
|
|
|
|
/* Depending on the size, the allocation is going to be done from dedicated,
|
|
non-dedicated lists or a virtual block of memory */
|
|
if (Index < HEAP_FREELISTS)
|
|
{
|
|
FreeListHead = &Heap->FreeLists[Index];
|
|
|
|
if (!IsListEmpty(FreeListHead))
|
|
{
|
|
/* There is a free entry in this list */
|
|
FreeBlock = CONTAINING_RECORD(FreeListHead->Blink,
|
|
HEAP_FREE_ENTRY,
|
|
FreeList);
|
|
|
|
/* Save flags and remove the free entry */
|
|
FreeFlags = FreeBlock->Flags;
|
|
RtlpRemoveFreeBlock(Heap, FreeBlock, TRUE, FALSE);
|
|
|
|
/* Update the total free size of the heap */
|
|
Heap->TotalFreeSize -= Index;
|
|
|
|
/* Initialize this block */
|
|
InUseEntry = (PHEAP_ENTRY)FreeBlock;
|
|
InUseEntry->Flags = EntryFlags | (FreeFlags & HEAP_ENTRY_LAST_ENTRY);
|
|
InUseEntry->UnusedBytes = (UCHAR)(AllocationSize - Size);
|
|
InUseEntry->SmallTagIndex = 0;
|
|
}
|
|
else
|
|
{
|
|
/* Find smallest free block which this request could fit in */
|
|
InUseIndex = Index >> 5;
|
|
FreeListsInUse = &Heap->u.FreeListsInUseUlong[InUseIndex];
|
|
|
|
/* This bit magic disables all sizes which are less than the requested allocation size */
|
|
FreeListsInUseUlong = *FreeListsInUse++ & ~((1 << ((ULONG)Index & 0x1f)) - 1);
|
|
|
|
/* If size is definitily more than our lists - go directly to the non-dedicated one */
|
|
if (InUseIndex > 3)
|
|
return RtlpAllocateNonDedicated(Heap, Flags, Size, AllocationSize, Index, HeapLocked);
|
|
|
|
/* Go through the list */
|
|
for (i = InUseIndex; i < 4; i++)
|
|
{
|
|
if (FreeListsInUseUlong)
|
|
{
|
|
FreeListHead = &Heap->FreeLists[i * 32];
|
|
break;
|
|
}
|
|
|
|
if (i < 3) FreeListsInUseUlong = *FreeListsInUse++;
|
|
}
|
|
|
|
/* Nothing found, search in the non-dedicated list */
|
|
if (i == 4)
|
|
return RtlpAllocateNonDedicated(Heap, Flags, Size, AllocationSize, Index, HeapLocked);
|
|
|
|
/* That list is found, now calculate exact block */
|
|
FreeListHead += RtlpFindLeastSetBit(FreeListsInUseUlong);
|
|
|
|
/* Take this entry and remove it from the list of free blocks */
|
|
FreeBlock = CONTAINING_RECORD(FreeListHead->Blink,
|
|
HEAP_FREE_ENTRY,
|
|
FreeList);
|
|
RtlpRemoveFreeBlock(Heap, FreeBlock, TRUE, FALSE);
|
|
|
|
/* Split it */
|
|
InUseEntry = RtlpSplitEntry(Heap, Flags, FreeBlock, AllocationSize, Index, Size);
|
|
}
|
|
|
|
/* Release the lock */
|
|
if (HeapLocked) RtlLeaveHeapLock(Heap->LockVariable);
|
|
|
|
/* Zero memory if that was requested */
|
|
if (Flags & HEAP_ZERO_MEMORY)
|
|
RtlZeroMemory(InUseEntry + 1, Size);
|
|
else if (Heap->Flags & HEAP_FREE_CHECKING_ENABLED)
|
|
{
|
|
/* Fill this block with a special pattern */
|
|
RtlFillMemoryUlong(InUseEntry + 1, Size & ~0x3, ARENA_INUSE_FILLER);
|
|
}
|
|
|
|
/* Fill tail of the block with a special pattern too if requested */
|
|
if (Heap->Flags & HEAP_TAIL_CHECKING_ENABLED)
|
|
{
|
|
RtlFillMemory((PCHAR)(InUseEntry + 1) + Size, sizeof(HEAP_ENTRY), HEAP_TAIL_FILL);
|
|
InUseEntry->Flags |= HEAP_ENTRY_FILL_PATTERN;
|
|
}
|
|
|
|
/* Prepare extra if it's present */
|
|
if (InUseEntry->Flags & HEAP_ENTRY_EXTRA_PRESENT)
|
|
{
|
|
Extra = RtlpGetExtraStuffPointer(InUseEntry);
|
|
RtlZeroMemory(Extra, sizeof(HEAP_ENTRY_EXTRA));
|
|
|
|
// TODO: Tagging
|
|
}
|
|
|
|
/* User data starts right after the entry's header */
|
|
return InUseEntry + 1;
|
|
}
|
|
else if (Index <= Heap->VirtualMemoryThreshold)
|
|
{
|
|
/* The block is too large for dedicated lists, but fine for a non-dedicated one */
|
|
return RtlpAllocateNonDedicated(Heap, Flags, Size, AllocationSize, Index, HeapLocked);
|
|
}
|
|
else if (Heap->Flags & HEAP_GROWABLE)
|
|
{
|
|
/* We've got a very big allocation request, satisfy it by directly allocating virtual memory */
|
|
AllocationSize += sizeof(HEAP_VIRTUAL_ALLOC_ENTRY) - sizeof(HEAP_ENTRY);
|
|
|
|
Status = ZwAllocateVirtualMemory(NtCurrentProcess(),
|
|
(PVOID *)&VirtualBlock,
|
|
0,
|
|
&AllocationSize,
|
|
MEM_COMMIT,
|
|
PAGE_READWRITE);
|
|
|
|
if (!NT_SUCCESS(Status))
|
|
{
|
|
// Set STATUS!
|
|
/* Release the lock */
|
|
if (HeapLocked) RtlLeaveHeapLock(Heap->LockVariable);
|
|
DPRINT1("HEAP: Allocation failed!\n");
|
|
return NULL;
|
|
}
|
|
|
|
/* Initialize the newly allocated block */
|
|
VirtualBlock->BusyBlock.Size = (USHORT)(AllocationSize - Size);
|
|
VirtualBlock->BusyBlock.Flags = EntryFlags | HEAP_ENTRY_VIRTUAL_ALLOC | HEAP_ENTRY_EXTRA_PRESENT;
|
|
VirtualBlock->CommitSize = AllocationSize;
|
|
VirtualBlock->ReserveSize = AllocationSize;
|
|
|
|
/* Insert it into the list of virtual allocations */
|
|
InsertTailList(&Heap->VirtualAllocdBlocks, &VirtualBlock->Entry);
|
|
|
|
/* Release the lock */
|
|
if (HeapLocked) RtlLeaveHeapLock(Heap->LockVariable);
|
|
|
|
/* Return pointer to user data */
|
|
return VirtualBlock + 1;
|
|
}
|
|
|
|
/* Generate an exception */
|
|
if (Flags & HEAP_GENERATE_EXCEPTIONS)
|
|
{
|
|
ExceptionRecord.ExceptionCode = STATUS_NO_MEMORY;
|
|
ExceptionRecord.ExceptionRecord = NULL;
|
|
ExceptionRecord.NumberParameters = 1;
|
|
ExceptionRecord.ExceptionFlags = 0;
|
|
ExceptionRecord.ExceptionInformation[0] = AllocationSize;
|
|
|
|
RtlRaiseException(&ExceptionRecord);
|
|
}
|
|
|
|
RtlSetLastWin32ErrorAndNtStatusFromNtStatus(STATUS_BUFFER_TOO_SMALL);
|
|
|
|
/* Release the lock */
|
|
if (HeapLocked) RtlLeaveHeapLock(Heap->LockVariable);
|
|
DPRINT1("HEAP: Allocation failed!\n");
|
|
return NULL;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* HeapFree (KERNEL32.338)
|
|
* RETURNS
|
|
* TRUE: Success
|
|
* FALSE: Failure
|
|
*
|
|
* @implemented
|
|
*/
|
|
BOOLEAN NTAPI RtlFreeHeap(
|
|
HANDLE HeapPtr, /* [in] Handle of heap */
|
|
ULONG Flags, /* [in] Heap freeing flags */
|
|
PVOID Ptr /* [in] Address of memory to free */
|
|
)
|
|
{
|
|
PHEAP Heap;
|
|
PHEAP_ENTRY HeapEntry;
|
|
USHORT TagIndex = 0;
|
|
SIZE_T BlockSize;
|
|
PHEAP_VIRTUAL_ALLOC_ENTRY VirtualEntry;
|
|
BOOLEAN Locked = FALSE;
|
|
NTSTATUS Status;
|
|
|
|
/* Freeing NULL pointer is a legal operation */
|
|
if (!Ptr) return TRUE;
|
|
|
|
/* Get pointer to the heap and force flags */
|
|
Heap = (PHEAP)HeapPtr;
|
|
Flags |= Heap->ForceFlags;
|
|
|
|
/* Call special heap */
|
|
if (RtlpHeapIsSpecial(Flags))
|
|
return RtlDebugFreeHeap(Heap, Flags, Ptr);
|
|
|
|
/* Lock if necessary */
|
|
if (!(Flags & HEAP_NO_SERIALIZE))
|
|
{
|
|
RtlEnterHeapLock(Heap->LockVariable, TRUE);
|
|
Locked = TRUE;
|
|
}
|
|
|
|
/* Get pointer to the heap entry */
|
|
HeapEntry = (PHEAP_ENTRY)Ptr - 1;
|
|
|
|
/* Check this entry, fail if it's invalid */
|
|
if (!(HeapEntry->Flags & HEAP_ENTRY_BUSY) ||
|
|
(((ULONG_PTR)Ptr & 0x7) != 0) ||
|
|
(HeapEntry->SegmentOffset >= HEAP_SEGMENTS))
|
|
{
|
|
/* This is an invalid block */
|
|
DPRINT1("HEAP: Trying to free an invalid address %p!\n", Ptr);
|
|
RtlSetLastWin32ErrorAndNtStatusFromNtStatus(STATUS_INVALID_PARAMETER);
|
|
|
|
/* Release the heap lock */
|
|
if (Locked) RtlLeaveHeapLock(Heap->LockVariable);
|
|
return FALSE;
|
|
}
|
|
|
|
if (HeapEntry->Flags & HEAP_ENTRY_VIRTUAL_ALLOC)
|
|
{
|
|
/* Big allocation */
|
|
VirtualEntry = CONTAINING_RECORD(HeapEntry, HEAP_VIRTUAL_ALLOC_ENTRY, BusyBlock);
|
|
|
|
/* Remove it from the list */
|
|
RemoveEntryList(&VirtualEntry->Entry);
|
|
|
|
// TODO: Tagging
|
|
|
|
BlockSize = 0;
|
|
Status = ZwFreeVirtualMemory(NtCurrentProcess(),
|
|
(PVOID *)&VirtualEntry,
|
|
&BlockSize,
|
|
MEM_RELEASE);
|
|
|
|
if (!NT_SUCCESS(Status))
|
|
{
|
|
DPRINT1("HEAP: Failed releasing memory with Status 0x%08X. Heap %p, ptr %p, base address %p\n",
|
|
Status, Heap, Ptr, VirtualEntry);
|
|
RtlSetLastWin32ErrorAndNtStatusFromNtStatus(Status);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/* Normal allocation */
|
|
BlockSize = HeapEntry->Size;
|
|
|
|
// TODO: Tagging
|
|
|
|
/* Coalesce in kernel mode, and in usermode if it's not disabled */
|
|
if (RtlpGetMode() == KernelMode ||
|
|
(RtlpGetMode() == UserMode && !(Heap->Flags & HEAP_DISABLE_COALESCE_ON_FREE)))
|
|
{
|
|
HeapEntry = (PHEAP_ENTRY)RtlpCoalesceFreeBlocks(Heap,
|
|
(PHEAP_FREE_ENTRY)HeapEntry,
|
|
&BlockSize,
|
|
FALSE);
|
|
}
|
|
|
|
/* If there is no need to decommit the block - put it into a free list */
|
|
if (BlockSize < Heap->DeCommitFreeBlockThreshold ||
|
|
(Heap->TotalFreeSize + BlockSize < Heap->DeCommitTotalFreeThreshold))
|
|
{
|
|
/* Check if it needs to go to a 0 list */
|
|
if (BlockSize > HEAP_MAX_BLOCK_SIZE)
|
|
{
|
|
/* General-purpose 0 list */
|
|
RtlpInsertFreeBlock(Heap, (PHEAP_FREE_ENTRY)HeapEntry, BlockSize);
|
|
}
|
|
else
|
|
{
|
|
/* Usual free list */
|
|
RtlpInsertFreeBlockHelper(Heap, (PHEAP_FREE_ENTRY)HeapEntry, BlockSize, FALSE);
|
|
|
|
/* Assert sizes are consistent */
|
|
if (!(HeapEntry->Flags & HEAP_ENTRY_LAST_ENTRY))
|
|
{
|
|
ASSERT((HeapEntry + BlockSize)->PreviousSize == BlockSize);
|
|
}
|
|
|
|
/* Increase the free size */
|
|
Heap->TotalFreeSize += BlockSize;
|
|
}
|
|
|
|
|
|
if (RtlpGetMode() == UserMode &&
|
|
TagIndex != 0)
|
|
{
|
|
// FIXME: Tagging
|
|
UNIMPLEMENTED;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/* Decommit this block */
|
|
RtlpDeCommitFreeBlock(Heap, (PHEAP_FREE_ENTRY)HeapEntry, BlockSize);
|
|
}
|
|
}
|
|
|
|
/* Release the heap lock */
|
|
if (Locked) RtlLeaveHeapLock(Heap->LockVariable);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
BOOLEAN NTAPI
|
|
RtlpGrowBlockInPlace (IN PHEAP Heap,
|
|
IN ULONG Flags,
|
|
IN PHEAP_ENTRY InUseEntry,
|
|
IN SIZE_T Size,
|
|
IN SIZE_T Index)
|
|
{
|
|
UCHAR EntryFlags, RememberFlags;
|
|
PHEAP_FREE_ENTRY FreeEntry, UnusedEntry, FollowingEntry;
|
|
SIZE_T FreeSize, PrevSize, TailPart, AddedSize = 0;
|
|
PHEAP_ENTRY_EXTRA OldExtra, NewExtra;
|
|
|
|
/* We can't grow beyond specified threshold */
|
|
if (Index > Heap->VirtualMemoryThreshold)
|
|
return FALSE;
|
|
|
|
/* Get entry flags */
|
|
EntryFlags = InUseEntry->Flags;
|
|
|
|
/* Get the next free entry */
|
|
FreeEntry = (PHEAP_FREE_ENTRY)(InUseEntry + InUseEntry->Size);
|
|
|
|
if (EntryFlags & HEAP_ENTRY_LAST_ENTRY)
|
|
{
|
|
/* There is no next block, just uncommitted space. Calculate how much is needed */
|
|
FreeSize = (Index - InUseEntry->Size) << HEAP_ENTRY_SHIFT;
|
|
FreeSize = ROUND_UP(FreeSize, PAGE_SIZE);
|
|
|
|
/* Find and commit those pages */
|
|
FreeEntry = RtlpFindAndCommitPages(Heap,
|
|
Heap->Segments[InUseEntry->SegmentOffset],
|
|
&FreeSize,
|
|
FreeEntry);
|
|
|
|
/* Fail if it failed... */
|
|
if (!FreeEntry) return FALSE;
|
|
|
|
/* It was successful, perform coalescing */
|
|
FreeSize = FreeSize >> HEAP_ENTRY_SHIFT;
|
|
FreeEntry = RtlpCoalesceFreeBlocks(Heap, FreeEntry, &FreeSize, FALSE);
|
|
|
|
/* Check if it's enough */
|
|
if (FreeSize + InUseEntry->Size < Index)
|
|
{
|
|
/* Still not enough */
|
|
RtlpInsertFreeBlock(Heap, FreeEntry, FreeSize);
|
|
Heap->TotalFreeSize += FreeSize;
|
|
return FALSE;
|
|
}
|
|
|
|
/* Remember flags of this free entry */
|
|
RememberFlags = FreeEntry->Flags;
|
|
|
|
/* Sum up sizes */
|
|
FreeSize += InUseEntry->Size;
|
|
}
|
|
else
|
|
{
|
|
/* The next block indeed exists. Check if it's free or in use */
|
|
if (FreeEntry->Flags & HEAP_ENTRY_BUSY) return FALSE;
|
|
|
|
/* Next entry is free, check if it can fit the block we need */
|
|
FreeSize = InUseEntry->Size + FreeEntry->Size;
|
|
if (FreeSize < Index) return FALSE;
|
|
|
|
/* Remember flags of this free entry */
|
|
RememberFlags = FreeEntry->Flags;
|
|
|
|
/* Remove this block from the free list */
|
|
RtlpRemoveFreeBlock(Heap, FreeEntry, FALSE, FALSE);
|
|
Heap->TotalFreeSize -= FreeEntry->Size;
|
|
}
|
|
|
|
PrevSize = (InUseEntry->Size << HEAP_ENTRY_SHIFT) - InUseEntry->UnusedBytes;
|
|
FreeSize -= Index;
|
|
|
|
/* Don't produce too small blocks */
|
|
if (FreeSize <= 2)
|
|
{
|
|
Index += FreeSize;
|
|
FreeSize = 0;
|
|
}
|
|
|
|
/* Process extra stuff */
|
|
if (RememberFlags & HEAP_ENTRY_EXTRA_PRESENT)
|
|
{
|
|
/* Calculate pointers */
|
|
OldExtra = (PHEAP_ENTRY_EXTRA)(InUseEntry + InUseEntry->Size - 1);
|
|
NewExtra = (PHEAP_ENTRY_EXTRA)(InUseEntry + Index - 1);
|
|
|
|
/* Copy contents */
|
|
*NewExtra = *OldExtra;
|
|
|
|
// FIXME Tagging
|
|
}
|
|
|
|
/* Update sizes */
|
|
InUseEntry->Size = (USHORT)Index;
|
|
InUseEntry->UnusedBytes = (UCHAR)((Index << HEAP_ENTRY_SHIFT) - Size);
|
|
|
|
/* Check if there is a free space remaining after merging those blocks */
|
|
if (!FreeSize)
|
|
{
|
|
/* Update flags and sizes */
|
|
InUseEntry->Flags |= RememberFlags & HEAP_ENTRY_LAST_ENTRY;
|
|
|
|
/* Either update previous size of the next entry or mark it as a last
|
|
entry in the segment*/
|
|
if (!(RememberFlags & HEAP_ENTRY_LAST_ENTRY))
|
|
(InUseEntry + InUseEntry->Size)->PreviousSize = InUseEntry->Size;
|
|
}
|
|
else
|
|
{
|
|
/* Complex case, we need to split the block to give unused free space
|
|
back to the heap */
|
|
UnusedEntry = (PHEAP_FREE_ENTRY)(InUseEntry + Index);
|
|
UnusedEntry->PreviousSize = (USHORT)Index;
|
|
UnusedEntry->SegmentOffset = InUseEntry->SegmentOffset;
|
|
|
|
/* Update the following block or set the last entry in the segment */
|
|
if (RememberFlags & HEAP_ENTRY_LAST_ENTRY)
|
|
{
|
|
/* Set flags and size */
|
|
UnusedEntry->Flags = RememberFlags;
|
|
UnusedEntry->Size = (USHORT)FreeSize;
|
|
|
|
/* Insert it to the heap and update total size */
|
|
RtlpInsertFreeBlockHelper(Heap, UnusedEntry, FreeSize, FALSE);
|
|
Heap->TotalFreeSize += FreeSize;
|
|
}
|
|
else
|
|
{
|
|
/* There is a block after this one */
|
|
FollowingEntry = (PHEAP_FREE_ENTRY)((PHEAP_ENTRY)UnusedEntry + FreeSize);
|
|
|
|
if (FollowingEntry->Flags & HEAP_ENTRY_BUSY)
|
|
{
|
|
/* Update flags and set size of the unused space entry */
|
|
UnusedEntry->Flags = RememberFlags & (~HEAP_ENTRY_LAST_ENTRY);
|
|
UnusedEntry->Size = (USHORT)FreeSize;
|
|
|
|
/* Update previous size of the following entry */
|
|
FollowingEntry->PreviousSize = (USHORT)FreeSize;
|
|
|
|
/* Insert it to the heap and update total free size */
|
|
RtlpInsertFreeBlockHelper(Heap, UnusedEntry, FreeSize, FALSE);
|
|
Heap->TotalFreeSize += FreeSize;
|
|
}
|
|
else
|
|
{
|
|
/* That following entry is also free, what a fortune! */
|
|
RememberFlags = FollowingEntry->Flags;
|
|
|
|
/* Remove it */
|
|
RtlpRemoveFreeBlock(Heap, FollowingEntry, FALSE, FALSE);
|
|
Heap->TotalFreeSize -= FollowingEntry->Size;
|
|
|
|
/* And make up a new combined block */
|
|
FreeSize += FollowingEntry->Size;
|
|
UnusedEntry->Flags = RememberFlags;
|
|
|
|
/* Check where to put it */
|
|
if (FreeSize <= HEAP_MAX_BLOCK_SIZE)
|
|
{
|
|
/* Fine for a dedicated list */
|
|
UnusedEntry->Size = (USHORT)FreeSize;
|
|
|
|
if (!(RememberFlags & HEAP_ENTRY_LAST_ENTRY))
|
|
((PHEAP_ENTRY)UnusedEntry + FreeSize)->PreviousSize = (USHORT)FreeSize;
|
|
|
|
/* Insert it back and update total size */
|
|
RtlpInsertFreeBlockHelper(Heap, UnusedEntry, FreeSize, FALSE);
|
|
Heap->TotalFreeSize += FreeSize;
|
|
}
|
|
else
|
|
{
|
|
/* The block is very large, leave all the hassle to the insertion routine */
|
|
RtlpInsertFreeBlock(Heap, UnusedEntry, FreeSize);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Properly "zero out" (and fill!) the space */
|
|
if (Flags & HEAP_ZERO_MEMORY)
|
|
{
|
|
RtlZeroMemory((PCHAR)(InUseEntry + 1) + PrevSize, Size - PrevSize);
|
|
}
|
|
else if (Heap->Flags & HEAP_FREE_CHECKING_ENABLED)
|
|
{
|
|
/* Calculate tail part which we need to fill */
|
|
TailPart = PrevSize & (sizeof(ULONG) - 1);
|
|
|
|
/* "Invert" it as usual */
|
|
if (TailPart) TailPart = 4 - TailPart;
|
|
|
|
if (Size > (PrevSize + TailPart))
|
|
AddedSize = (Size - (PrevSize + TailPart)) & ~(sizeof(ULONG) - 1);
|
|
|
|
if (AddedSize)
|
|
{
|
|
RtlFillMemoryUlong((PCHAR)(InUseEntry + 1) + PrevSize + TailPart,
|
|
AddedSize,
|
|
ARENA_INUSE_FILLER);
|
|
}
|
|
}
|
|
|
|
/* Fill the new tail */
|
|
if (Heap->Flags & HEAP_TAIL_CHECKING_ENABLED)
|
|
{
|
|
RtlFillMemory((PCHAR)(InUseEntry + 1) + Size,
|
|
HEAP_ENTRY_SIZE,
|
|
HEAP_TAIL_FILL);
|
|
}
|
|
|
|
/* Copy user settable flags */
|
|
InUseEntry->Flags &= ~HEAP_ENTRY_SETTABLE_FLAGS;
|
|
InUseEntry->Flags |= ((Flags & HEAP_SETTABLE_USER_FLAGS) >> 4);
|
|
|
|
/* Return success */
|
|
return TRUE;
|
|
}
|
|
|
|
PHEAP_ENTRY_EXTRA NTAPI
|
|
RtlpGetExtraStuffPointer(PHEAP_ENTRY HeapEntry)
|
|
{
|
|
PHEAP_VIRTUAL_ALLOC_ENTRY VirtualEntry;
|
|
|
|
/* Check if it's a big block */
|
|
if (HeapEntry->Flags & HEAP_ENTRY_VIRTUAL_ALLOC)
|
|
{
|
|
VirtualEntry = CONTAINING_RECORD(HeapEntry, HEAP_VIRTUAL_ALLOC_ENTRY, BusyBlock);
|
|
|
|
/* Return a pointer to the extra stuff*/
|
|
return &VirtualEntry->ExtraStuff;
|
|
}
|
|
else
|
|
{
|
|
/* This is a usual entry, which means extra stuff follows this block */
|
|
return (PHEAP_ENTRY_EXTRA)(HeapEntry + HeapEntry->Size - 1);
|
|
}
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* RtlReAllocateHeap
|
|
* PARAMS
|
|
* Heap [in] Handle of heap block
|
|
* Flags [in] Heap reallocation flags
|
|
* Ptr, [in] Address of memory to reallocate
|
|
* Size [in] Number of bytes to reallocate
|
|
*
|
|
* RETURNS
|
|
* Pointer to reallocated memory block
|
|
* NULL: Failure
|
|
* 0x7d030f60--invalid flags in RtlHeapAllocate
|
|
* @implemented
|
|
*/
|
|
PVOID NTAPI
|
|
RtlReAllocateHeap(HANDLE HeapPtr,
|
|
ULONG Flags,
|
|
PVOID Ptr,
|
|
SIZE_T Size)
|
|
{
|
|
PHEAP Heap = (PHEAP)HeapPtr;
|
|
PHEAP_ENTRY InUseEntry, NewInUseEntry;
|
|
PHEAP_ENTRY_EXTRA OldExtra, NewExtra;
|
|
SIZE_T AllocationSize, FreeSize, DecommitSize;
|
|
BOOLEAN HeapLocked = FALSE;
|
|
PVOID NewBaseAddress;
|
|
PHEAP_FREE_ENTRY SplitBlock, SplitBlock2;
|
|
SIZE_T OldSize, Index, OldIndex;
|
|
UCHAR FreeFlags;
|
|
NTSTATUS Status;
|
|
PVOID DecommitBase;
|
|
SIZE_T RemainderBytes, ExtraSize;
|
|
PHEAP_VIRTUAL_ALLOC_ENTRY VirtualAllocBlock;
|
|
EXCEPTION_RECORD ExceptionRecord;
|
|
|
|
/* Return success in case of a null pointer */
|
|
if (!Ptr)
|
|
{
|
|
RtlSetLastWin32ErrorAndNtStatusFromNtStatus(STATUS_SUCCESS);
|
|
return NULL;
|
|
}
|
|
|
|
/* Force heap flags */
|
|
Flags |= Heap->ForceFlags;
|
|
|
|
/* Call special heap */
|
|
if (RtlpHeapIsSpecial(Flags))
|
|
return RtlDebugReAllocateHeap(Heap, Flags, Ptr, Size);
|
|
|
|
/* Make sure size is valid */
|
|
if (Size >= 0x80000000)
|
|
{
|
|
RtlSetLastWin32ErrorAndNtStatusFromNtStatus(STATUS_NO_MEMORY);
|
|
return NULL;
|
|
}
|
|
|
|
/* Calculate allocation size and index */
|
|
if (Size)
|
|
AllocationSize = Size;
|
|
else
|
|
AllocationSize = 1;
|
|
AllocationSize = (AllocationSize + Heap->AlignRound) & Heap->AlignMask;
|
|
|
|
/* Add up extra stuff, if it is present anywhere */
|
|
if (((((PHEAP_ENTRY)Ptr)-1)->Flags & HEAP_ENTRY_EXTRA_PRESENT) ||
|
|
(Flags & HEAP_EXTRA_FLAGS_MASK) ||
|
|
Heap->PseudoTagEntries)
|
|
{
|
|
AllocationSize += sizeof(HEAP_ENTRY_EXTRA);
|
|
}
|
|
|
|
/* Acquire the lock if necessary */
|
|
if (!(Flags & HEAP_NO_SERIALIZE))
|
|
{
|
|
RtlEnterHeapLock(Heap->LockVariable, TRUE);
|
|
HeapLocked = TRUE;
|
|
Flags &= ~HEAP_NO_SERIALIZE;
|
|
}
|
|
|
|
/* Get the pointer to the in-use entry */
|
|
InUseEntry = (PHEAP_ENTRY)Ptr - 1;
|
|
|
|
/* If that entry is not really in-use, we have a problem */
|
|
if (!(InUseEntry->Flags & HEAP_ENTRY_BUSY))
|
|
{
|
|
RtlSetLastWin32ErrorAndNtStatusFromNtStatus(STATUS_INVALID_PARAMETER);
|
|
|
|
/* Release the lock and return */
|
|
if (HeapLocked)
|
|
RtlLeaveHeapLock(Heap->LockVariable);
|
|
return Ptr;
|
|
}
|
|
|
|
if (InUseEntry->Flags & HEAP_ENTRY_VIRTUAL_ALLOC)
|
|
{
|
|
/* This is a virtually allocated block. Get its size */
|
|
OldSize = RtlpGetSizeOfBigBlock(InUseEntry);
|
|
|
|
/* Convert it to an index */
|
|
OldIndex = (OldSize + InUseEntry->Size) >> HEAP_ENTRY_SHIFT;
|
|
|
|
/* Calculate new allocation size and round it to the page size */
|
|
AllocationSize += FIELD_OFFSET(HEAP_VIRTUAL_ALLOC_ENTRY, BusyBlock);
|
|
AllocationSize = ROUND_UP(AllocationSize, PAGE_SIZE);
|
|
}
|
|
else
|
|
{
|
|
/* Usual entry */
|
|
OldIndex = InUseEntry->Size;
|
|
|
|
OldSize = (OldIndex << HEAP_ENTRY_SHIFT) - InUseEntry->UnusedBytes;
|
|
}
|
|
|
|
/* Calculate new index */
|
|
Index = AllocationSize >> HEAP_ENTRY_SHIFT;
|
|
|
|
/* Check for 4 different scenarios (old size, new size, old index, new index) */
|
|
if (Index <= OldIndex)
|
|
{
|
|
/* Difference must be greater than 1, adjust if it's not so */
|
|
if (Index + 1 == OldIndex)
|
|
{
|
|
Index++;
|
|
AllocationSize += sizeof(HEAP_ENTRY);
|
|
}
|
|
|
|
/* Calculate new size */
|
|
if (InUseEntry->Flags & HEAP_ENTRY_VIRTUAL_ALLOC)
|
|
{
|
|
/* Simple in case of a virtual alloc - just an unused size */
|
|
InUseEntry->Size = (USHORT)((AllocationSize - Size) >> HEAP_ENTRY_SHIFT);
|
|
}
|
|
else if (InUseEntry->Flags & HEAP_ENTRY_EXTRA_PRESENT)
|
|
{
|
|
/* There is extra stuff, take it into account */
|
|
OldExtra = (PHEAP_ENTRY_EXTRA)(InUseEntry + InUseEntry->Size - 1);
|
|
NewExtra = (PHEAP_ENTRY_EXTRA)(InUseEntry + Index - 1);
|
|
*NewExtra = *OldExtra;
|
|
|
|
// FIXME Tagging, TagIndex
|
|
|
|
/* Update unused bytes count */
|
|
InUseEntry->UnusedBytes = (UCHAR)(AllocationSize - Size);
|
|
}
|
|
else
|
|
{
|
|
// FIXME Tagging, SmallTagIndex
|
|
InUseEntry->UnusedBytes = (UCHAR)(AllocationSize - Size);
|
|
}
|
|
|
|
/* If new size is bigger than the old size */
|
|
if (Size > OldSize)
|
|
{
|
|
/* Zero out that additional space if required */
|
|
if (Flags & HEAP_ZERO_MEMORY)
|
|
{
|
|
RtlZeroMemory((PCHAR)Ptr + OldSize, Size - OldSize);
|
|
}
|
|
else if (Heap->Flags & HEAP_FREE_CHECKING_ENABLED)
|
|
{
|
|
/* Fill it on free if required */
|
|
RemainderBytes = OldSize & (sizeof(ULONG) - 1);
|
|
|
|
if (RemainderBytes)
|
|
RemainderBytes = 4 - RemainderBytes;
|
|
|
|
if (Size > (OldSize + RemainderBytes))
|
|
{
|
|
/* Calculate actual amount of extra bytes to fill */
|
|
ExtraSize = (Size - (OldSize + RemainderBytes)) & ~(sizeof(ULONG) - 1);
|
|
|
|
/* Fill them if there are any */
|
|
if (ExtraSize != 0)
|
|
{
|
|
RtlFillMemoryUlong((PCHAR)(InUseEntry + 1) + OldSize + RemainderBytes,
|
|
ExtraSize,
|
|
ARENA_INUSE_FILLER);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Fill tail of the heap entry if required */
|
|
if (Heap->Flags & HEAP_TAIL_CHECKING_ENABLED)
|
|
{
|
|
RtlFillMemory((PCHAR)(InUseEntry + 1) + Size,
|
|
HEAP_ENTRY_SIZE,
|
|
HEAP_TAIL_FILL);
|
|
}
|
|
|
|
/* Check if the difference is significant or not */
|
|
if (Index != OldIndex)
|
|
{
|
|
/* Save flags */
|
|
FreeFlags = InUseEntry->Flags & ~HEAP_ENTRY_BUSY;
|
|
|
|
if (FreeFlags & HEAP_ENTRY_VIRTUAL_ALLOC)
|
|
{
|
|
/* This is a virtual block allocation */
|
|
VirtualAllocBlock = CONTAINING_RECORD(InUseEntry, HEAP_VIRTUAL_ALLOC_ENTRY, BusyBlock);
|
|
|
|
// FIXME Tagging!
|
|
|
|
DecommitBase = (PCHAR)VirtualAllocBlock + AllocationSize;
|
|
DecommitSize = (OldIndex << HEAP_ENTRY_SHIFT) - AllocationSize;
|
|
|
|
/* Release the memory */
|
|
Status = ZwFreeVirtualMemory(NtCurrentProcess(),
|
|
(PVOID *)&DecommitBase,
|
|
&DecommitSize,
|
|
MEM_RELEASE);
|
|
|
|
if (!NT_SUCCESS(Status))
|
|
{
|
|
DPRINT1("HEAP: Unable to release memory (pointer %p, size 0x%x), Status %08x\n", DecommitBase, DecommitSize, Status);
|
|
}
|
|
else
|
|
{
|
|
/* Otherwise reduce the commit size */
|
|
VirtualAllocBlock->CommitSize -= DecommitSize;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/* Reduce size of the block and possibly split it */
|
|
SplitBlock = (PHEAP_FREE_ENTRY)(InUseEntry + Index);
|
|
|
|
/* Initialize this entry */
|
|
SplitBlock->Flags = FreeFlags;
|
|
SplitBlock->PreviousSize = (USHORT)Index;
|
|
SplitBlock->SegmentOffset = InUseEntry->SegmentOffset;
|
|
|
|
/* Remember free size */
|
|
FreeSize = InUseEntry->Size - Index;
|
|
|
|
/* Set new size */
|
|
InUseEntry->Size = (USHORT)Index;
|
|
InUseEntry->Flags &= ~HEAP_ENTRY_LAST_ENTRY;
|
|
|
|
/* Is that the last entry */
|
|
if (FreeFlags & HEAP_ENTRY_LAST_ENTRY)
|
|
{
|
|
/* Set its size and insert it to the list */
|
|
SplitBlock->Size = (USHORT)FreeSize;
|
|
RtlpInsertFreeBlockHelper(Heap, SplitBlock, FreeSize, FALSE);
|
|
|
|
/* Update total free size */
|
|
Heap->TotalFreeSize += FreeSize;
|
|
}
|
|
else
|
|
{
|
|
/* Get the block after that one */
|
|
SplitBlock2 = (PHEAP_FREE_ENTRY)((PHEAP_ENTRY)SplitBlock + FreeSize);
|
|
|
|
if (SplitBlock2->Flags & HEAP_ENTRY_BUSY)
|
|
{
|
|
/* It's in use, add it here*/
|
|
SplitBlock->Size = (USHORT)FreeSize;
|
|
|
|
/* Update previous size of the next entry */
|
|
((PHEAP_FREE_ENTRY)((PHEAP_ENTRY)SplitBlock + FreeSize))->PreviousSize = (USHORT)FreeSize;
|
|
|
|
/* Insert it to the list */
|
|
RtlpInsertFreeBlockHelper(Heap, SplitBlock, FreeSize, FALSE);
|
|
|
|
/* Update total size */
|
|
Heap->TotalFreeSize += FreeSize;
|
|
}
|
|
else
|
|
{
|
|
/* Next entry is free, so merge with it */
|
|
SplitBlock->Flags = SplitBlock2->Flags;
|
|
|
|
/* Remove it, update total size */
|
|
RtlpRemoveFreeBlock(Heap, SplitBlock2, FALSE, FALSE);
|
|
Heap->TotalFreeSize -= SplitBlock2->Size;
|
|
|
|
/* Calculate total free size */
|
|
FreeSize += SplitBlock2->Size;
|
|
|
|
if (FreeSize <= HEAP_MAX_BLOCK_SIZE)
|
|
{
|
|
SplitBlock->Size = (USHORT)FreeSize;
|
|
|
|
if (!(SplitBlock->Flags & HEAP_ENTRY_LAST_ENTRY))
|
|
{
|
|
/* Update previous size of the next entry */
|
|
((PHEAP_FREE_ENTRY)((PHEAP_ENTRY)SplitBlock + FreeSize))->PreviousSize = (USHORT)FreeSize;
|
|
}
|
|
|
|
/* Insert the new one back and update total size */
|
|
RtlpInsertFreeBlockHelper(Heap, SplitBlock, FreeSize, FALSE);
|
|
Heap->TotalFreeSize += FreeSize;
|
|
}
|
|
else
|
|
{
|
|
/* Just add it */
|
|
RtlpInsertFreeBlock(Heap, SplitBlock, FreeSize);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/* We're growing the block */
|
|
if ((InUseEntry->Flags & HEAP_ENTRY_VIRTUAL_ALLOC) ||
|
|
!RtlpGrowBlockInPlace(Heap, Flags, InUseEntry, Size, Index))
|
|
{
|
|
/* Growing in place failed, so growing out of place */
|
|
if (Flags & HEAP_REALLOC_IN_PLACE_ONLY)
|
|
{
|
|
DPRINT1("Realloc in place failed, but it was the only option\n");
|
|
Ptr = NULL;
|
|
}
|
|
else
|
|
{
|
|
/* Clear tag bits */
|
|
Flags &= ~HEAP_TAG_MASK;
|
|
|
|
/* Process extra stuff */
|
|
if (InUseEntry->Flags & HEAP_ENTRY_EXTRA_PRESENT)
|
|
{
|
|
/* Preserve user settable flags */
|
|
Flags &= ~HEAP_SETTABLE_USER_FLAGS;
|
|
|
|
Flags |= HEAP_SETTABLE_USER_VALUE | ((InUseEntry->Flags & HEAP_ENTRY_SETTABLE_FLAGS) << 4);
|
|
|
|
/* Get pointer to the old extra data */
|
|
OldExtra = RtlpGetExtraStuffPointer(InUseEntry);
|
|
|
|
/* Save tag index if it was set */
|
|
if (OldExtra->TagIndex &&
|
|
!(OldExtra->TagIndex & HEAP_PSEUDO_TAG_FLAG))
|
|
{
|
|
Flags |= OldExtra->TagIndex << HEAP_TAG_SHIFT;
|
|
}
|
|
}
|
|
else if (InUseEntry->SmallTagIndex)
|
|
{
|
|
/* Take small tag index into account */
|
|
Flags |= InUseEntry->SmallTagIndex << HEAP_TAG_SHIFT;
|
|
}
|
|
|
|
/* Allocate new block from the heap */
|
|
NewBaseAddress = RtlAllocateHeap(HeapPtr,
|
|
Flags & ~HEAP_ZERO_MEMORY,
|
|
Size);
|
|
|
|
/* Proceed if it didn't fail */
|
|
if (NewBaseAddress)
|
|
{
|
|
/* Get new entry pointer */
|
|
NewInUseEntry = (PHEAP_ENTRY)NewBaseAddress - 1;
|
|
|
|
/* Process extra stuff if it exists */
|
|
if (NewInUseEntry->Flags & HEAP_ENTRY_EXTRA_PRESENT)
|
|
{
|
|
NewExtra = RtlpGetExtraStuffPointer(NewInUseEntry);
|
|
|
|
if (InUseEntry->Flags & HEAP_ENTRY_EXTRA_PRESENT)
|
|
{
|
|
OldExtra = RtlpGetExtraStuffPointer(InUseEntry);
|
|
NewExtra->Settable = OldExtra->Settable;
|
|
}
|
|
else
|
|
{
|
|
RtlZeroMemory(NewExtra, sizeof(*NewExtra));
|
|
}
|
|
}
|
|
|
|
/* Copy actual user bits */
|
|
if (Size < OldSize)
|
|
RtlMoveMemory(NewBaseAddress, Ptr, Size);
|
|
else
|
|
RtlMoveMemory(NewBaseAddress, Ptr, OldSize);
|
|
|
|
/* Zero remaining part if required */
|
|
if (Size > OldSize &&
|
|
(Flags & HEAP_ZERO_MEMORY))
|
|
{
|
|
RtlZeroMemory((PCHAR)NewBaseAddress + OldSize, Size - OldSize);
|
|
}
|
|
|
|
/* Free the old block */
|
|
RtlFreeHeap(HeapPtr, Flags, Ptr);
|
|
}
|
|
|
|
Ptr = NewBaseAddress;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Did resizing fail? */
|
|
if (!Ptr && (Flags & HEAP_GENERATE_EXCEPTIONS))
|
|
{
|
|
/* Generate an exception if required */
|
|
ExceptionRecord.ExceptionCode = STATUS_NO_MEMORY;
|
|
ExceptionRecord.ExceptionRecord = NULL;
|
|
ExceptionRecord.NumberParameters = 1;
|
|
ExceptionRecord.ExceptionFlags = 0;
|
|
ExceptionRecord.ExceptionInformation[0] = AllocationSize;
|
|
|
|
RtlRaiseException(&ExceptionRecord);
|
|
}
|
|
|
|
/* Release the heap lock if it was acquired */
|
|
if (HeapLocked)
|
|
RtlLeaveHeapLock(Heap->LockVariable);
|
|
|
|
return Ptr;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* RtlCompactHeap
|
|
*
|
|
* @unimplemented
|
|
*/
|
|
ULONG NTAPI
|
|
RtlCompactHeap(HANDLE Heap,
|
|
ULONG Flags)
|
|
{
|
|
UNIMPLEMENTED;
|
|
return 0;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* RtlLockHeap
|
|
* Attempts to acquire the critical section object for a specified heap.
|
|
*
|
|
* PARAMS
|
|
* Heap [in] Handle of heap to lock for exclusive access
|
|
*
|
|
* RETURNS
|
|
* TRUE: Success
|
|
* FALSE: Failure
|
|
*
|
|
* @implemented
|
|
*/
|
|
BOOLEAN NTAPI
|
|
RtlLockHeap(IN HANDLE HeapPtr)
|
|
{
|
|
PHEAP Heap = (PHEAP)HeapPtr;
|
|
|
|
// FIXME Check for special heap
|
|
|
|
/* Check if it's really a heap */
|
|
if (Heap->Signature != HEAP_SIGNATURE) return FALSE;
|
|
|
|
/* Lock if it's lockable */
|
|
if (!(Heap->Flags & HEAP_NO_SERIALIZE))
|
|
{
|
|
RtlEnterHeapLock(Heap->LockVariable, TRUE);
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* RtlUnlockHeap
|
|
* Releases ownership of the critical section object.
|
|
*
|
|
* PARAMS
|
|
* Heap [in] Handle to the heap to unlock
|
|
*
|
|
* RETURNS
|
|
* TRUE: Success
|
|
* FALSE: Failure
|
|
*
|
|
* @implemented
|
|
*/
|
|
BOOLEAN NTAPI
|
|
RtlUnlockHeap(HANDLE HeapPtr)
|
|
{
|
|
PHEAP Heap = (PHEAP)HeapPtr;
|
|
|
|
// FIXME Check for special heap
|
|
|
|
/* Check if it's really a heap */
|
|
if (Heap->Signature != HEAP_SIGNATURE) return FALSE;
|
|
|
|
/* Unlock if it's lockable */
|
|
if (!(Heap->Flags & HEAP_NO_SERIALIZE))
|
|
{
|
|
RtlLeaveHeapLock(Heap->LockVariable);
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
/***********************************************************************
|
|
* RtlSizeHeap
|
|
* PARAMS
|
|
* Heap [in] Handle of heap
|
|
* Flags [in] Heap size control flags
|
|
* Ptr [in] Address of memory to return size for
|
|
*
|
|
* RETURNS
|
|
* Size in bytes of allocated memory
|
|
* 0xffffffff: Failure
|
|
*
|
|
* @implemented
|
|
*/
|
|
SIZE_T NTAPI
|
|
RtlSizeHeap(
|
|
HANDLE HeapPtr,
|
|
ULONG Flags,
|
|
PVOID Ptr
|
|
)
|
|
{
|
|
PHEAP Heap = (PHEAP)HeapPtr;
|
|
PHEAP_ENTRY HeapEntry;
|
|
SIZE_T EntrySize;
|
|
|
|
// FIXME This is a hack around missing SEH support!
|
|
if (!Heap)
|
|
{
|
|
RtlSetLastWin32ErrorAndNtStatusFromNtStatus(STATUS_INVALID_HANDLE);
|
|
return (SIZE_T)-1;
|
|
}
|
|
|
|
/* Force flags */
|
|
Flags |= Heap->ForceFlags;
|
|
|
|
/* Call special heap */
|
|
if (RtlpHeapIsSpecial(Flags))
|
|
return RtlDebugSizeHeap(Heap, Flags, Ptr);
|
|
|
|
/* Get the heap entry pointer */
|
|
HeapEntry = (PHEAP_ENTRY)Ptr - 1;
|
|
|
|
/* Return -1 if that entry is free */
|
|
if (!(HeapEntry->Flags & HEAP_ENTRY_BUSY))
|
|
{
|
|
RtlSetLastWin32ErrorAndNtStatusFromNtStatus(STATUS_INVALID_PARAMETER);
|
|
return (SIZE_T)-1;
|
|
}
|
|
|
|
/* Get size of this block depending if it's a usual or a big one */
|
|
if (HeapEntry->Flags & HEAP_ENTRY_VIRTUAL_ALLOC)
|
|
{
|
|
EntrySize = RtlpGetSizeOfBigBlock(HeapEntry);
|
|
}
|
|
else
|
|
{
|
|
/* Calculate it */
|
|
EntrySize = (HeapEntry->Size << HEAP_ENTRY_SHIFT) - HeapEntry->UnusedBytes;
|
|
}
|
|
|
|
/* Return calculated size */
|
|
return EntrySize;
|
|
}
|
|
|
|
BOOLEAN NTAPI
|
|
RtlpCheckInUsePattern(PHEAP_ENTRY HeapEntry)
|
|
{
|
|
SIZE_T Size, Result;
|
|
PCHAR TailPart;
|
|
|
|
/* Calculate size */
|
|
if (HeapEntry->Flags & HEAP_ENTRY_VIRTUAL_ALLOC)
|
|
Size = RtlpGetSizeOfBigBlock(HeapEntry);
|
|
else
|
|
Size = (HeapEntry->Size << HEAP_ENTRY_SHIFT) - HeapEntry->UnusedBytes;
|
|
|
|
/* Calculate pointer to the tail part of the block */
|
|
TailPart = (PCHAR)(HeapEntry + 1) + Size;
|
|
|
|
/* Compare tail pattern */
|
|
Result = RtlCompareMemory(TailPart,
|
|
FillPattern,
|
|
HEAP_ENTRY_SIZE);
|
|
|
|
if (Result != HEAP_ENTRY_SIZE)
|
|
{
|
|
DPRINT1("HEAP: Heap entry (size %x) %p tail is modified at %p\n", Size, HeapEntry, TailPart + Result);
|
|
return FALSE;
|
|
}
|
|
|
|
/* All is fine */
|
|
return TRUE;
|
|
}
|
|
|
|
BOOLEAN NTAPI
|
|
RtlpValidateHeapHeaders(
|
|
PHEAP Heap,
|
|
BOOLEAN Recalculate)
|
|
{
|
|
// We skip header validation for now
|
|
return TRUE;
|
|
}
|
|
|
|
BOOLEAN NTAPI
|
|
RtlpValidateHeapEntry(
|
|
PHEAP Heap,
|
|
PHEAP_ENTRY HeapEntry)
|
|
{
|
|
BOOLEAN BigAllocation, EntryFound = FALSE;
|
|
PHEAP_SEGMENT Segment;
|
|
ULONG SegmentOffset;
|
|
|
|
/* Perform various consistency checks of this entry */
|
|
if (!HeapEntry) goto invalid_entry;
|
|
if ((ULONG_PTR)HeapEntry & (HEAP_ENTRY_SIZE - 1)) goto invalid_entry;
|
|
if (!(HeapEntry->Flags & HEAP_ENTRY_BUSY)) goto invalid_entry;
|
|
|
|
BigAllocation = HeapEntry->Flags & HEAP_ENTRY_VIRTUAL_ALLOC;
|
|
Segment = Heap->Segments[HeapEntry->SegmentOffset];
|
|
|
|
if (BigAllocation &&
|
|
(((ULONG_PTR)HeapEntry & (PAGE_SIZE - 1)) != FIELD_OFFSET(HEAP_VIRTUAL_ALLOC_ENTRY, BusyBlock)))
|
|
goto invalid_entry;
|
|
|
|
if (!BigAllocation && (HeapEntry->SegmentOffset >= HEAP_SEGMENTS ||
|
|
!Segment ||
|
|
HeapEntry < Segment->FirstEntry ||
|
|
HeapEntry >= Segment->LastValidEntry))
|
|
goto invalid_entry;
|
|
|
|
if ((HeapEntry->Flags & HEAP_ENTRY_FILL_PATTERN) &&
|
|
!RtlpCheckInUsePattern(HeapEntry))
|
|
goto invalid_entry;
|
|
|
|
/* Checks are done, if this is a virtual entry, that's all */
|
|
if (HeapEntry->Flags & HEAP_ENTRY_VIRTUAL_ALLOC) return TRUE;
|
|
|
|
/* Go through segments and check if this entry fits into any of them */
|
|
for (SegmentOffset = 0; SegmentOffset < HEAP_SEGMENTS; SegmentOffset++)
|
|
{
|
|
Segment = Heap->Segments[SegmentOffset];
|
|
if (!Segment) continue;
|
|
|
|
if ((HeapEntry >= Segment->FirstEntry) &&
|
|
(HeapEntry < Segment->LastValidEntry))
|
|
{
|
|
/* Got it */
|
|
EntryFound = TRUE;
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* Return our result of finding entry in the segments */
|
|
return EntryFound;
|
|
|
|
invalid_entry:
|
|
DPRINT1("HEAP: Invalid heap entry %p in heap %p\n", HeapEntry, Heap);
|
|
return FALSE;
|
|
}
|
|
|
|
BOOLEAN NTAPI
|
|
RtlpValidateHeapSegment(
|
|
PHEAP Heap,
|
|
PHEAP_SEGMENT Segment,
|
|
UCHAR SegmentOffset,
|
|
PULONG FreeEntriesCount,
|
|
PSIZE_T TotalFreeSize,
|
|
PSIZE_T TagEntries,
|
|
PSIZE_T PseudoTagEntries)
|
|
{
|
|
PHEAP_UCR_DESCRIPTOR UcrDescriptor;
|
|
PLIST_ENTRY UcrEntry;
|
|
SIZE_T ByteSize, Size, Result;
|
|
PHEAP_ENTRY CurrentEntry;
|
|
ULONG UnCommittedPages;
|
|
ULONG UnCommittedRanges;
|
|
ULONG PreviousSize;
|
|
|
|
UnCommittedPages = 0;
|
|
UnCommittedRanges = 0;
|
|
|
|
if (IsListEmpty(&Segment->UCRSegmentList))
|
|
{
|
|
UcrEntry = NULL;
|
|
UcrDescriptor = NULL;
|
|
}
|
|
else
|
|
{
|
|
UcrEntry = Segment->UCRSegmentList.Flink;
|
|
UcrDescriptor = CONTAINING_RECORD(UcrEntry, HEAP_UCR_DESCRIPTOR, SegmentEntry);
|
|
}
|
|
|
|
if (Segment->BaseAddress == Heap)
|
|
CurrentEntry = &Heap->Entry;
|
|
else
|
|
CurrentEntry = &Segment->Entry;
|
|
|
|
while (CurrentEntry < Segment->LastValidEntry)
|
|
{
|
|
if (UcrDescriptor &&
|
|
((PVOID)CurrentEntry >= UcrDescriptor->Address))
|
|
{
|
|
DPRINT1("HEAP: Entry %p is not inside uncommited range [%p .. %p)\n",
|
|
CurrentEntry, UcrDescriptor->Address,
|
|
(PCHAR)UcrDescriptor->Address + UcrDescriptor->Size);
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
PreviousSize = 0;
|
|
|
|
while (CurrentEntry < Segment->LastValidEntry)
|
|
{
|
|
if (PreviousSize != CurrentEntry->PreviousSize)
|
|
{
|
|
DPRINT1("HEAP: Entry %p has incorrect PreviousSize %x instead of %x\n",
|
|
CurrentEntry, CurrentEntry->PreviousSize, PreviousSize);
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
PreviousSize = CurrentEntry->Size;
|
|
Size = CurrentEntry->Size << HEAP_ENTRY_SHIFT;
|
|
|
|
if (CurrentEntry->Flags & HEAP_ENTRY_BUSY)
|
|
{
|
|
if (TagEntries)
|
|
{
|
|
UNIMPLEMENTED;
|
|
}
|
|
|
|
/* Check fill pattern */
|
|
if (CurrentEntry->Flags & HEAP_ENTRY_FILL_PATTERN)
|
|
{
|
|
if (!RtlpCheckInUsePattern(CurrentEntry))
|
|
return FALSE;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/* The entry is free, increase free entries count and total free size */
|
|
*FreeEntriesCount = *FreeEntriesCount + 1;
|
|
*TotalFreeSize += CurrentEntry->Size;
|
|
|
|
if ((Heap->Flags & HEAP_FREE_CHECKING_ENABLED) &&
|
|
(CurrentEntry->Flags & HEAP_ENTRY_FILL_PATTERN))
|
|
{
|
|
ByteSize = Size - sizeof(HEAP_FREE_ENTRY);
|
|
|
|
if ((CurrentEntry->Flags & HEAP_ENTRY_EXTRA_PRESENT) &&
|
|
(ByteSize > sizeof(HEAP_FREE_ENTRY_EXTRA)))
|
|
{
|
|
ByteSize -= sizeof(HEAP_FREE_ENTRY_EXTRA);
|
|
}
|
|
|
|
Result = RtlCompareMemoryUlong((PCHAR)((PHEAP_FREE_ENTRY)CurrentEntry + 1),
|
|
ByteSize,
|
|
ARENA_FREE_FILLER);
|
|
|
|
if (Result != ByteSize)
|
|
{
|
|
DPRINT1("HEAP: Free heap block %p modified at %p after it was freed\n",
|
|
CurrentEntry,
|
|
(PCHAR)(CurrentEntry + 1) + Result);
|
|
|
|
return FALSE;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (CurrentEntry->SegmentOffset != SegmentOffset)
|
|
{
|
|
DPRINT1("HEAP: Heap entry %p SegmentOffset is incorrect %x (should be %x)\n",
|
|
CurrentEntry, SegmentOffset, CurrentEntry->SegmentOffset);
|
|
return FALSE;
|
|
}
|
|
|
|
/* Check if it's the last entry */
|
|
if (CurrentEntry->Flags & HEAP_ENTRY_LAST_ENTRY)
|
|
{
|
|
CurrentEntry = (PHEAP_ENTRY)((PCHAR)CurrentEntry + Size);
|
|
|
|
if (!UcrDescriptor)
|
|
{
|
|
/* Check if it's not really the last one */
|
|
if (CurrentEntry != Segment->LastValidEntry)
|
|
{
|
|
DPRINT1("HEAP: Heap entry %p is not last block in segment (%p)\n",
|
|
CurrentEntry, Segment->LastValidEntry);
|
|
return FALSE;
|
|
}
|
|
}
|
|
else if (CurrentEntry != UcrDescriptor->Address)
|
|
{
|
|
DPRINT1("HEAP: Heap entry %p does not match next uncommitted address (%p)\n",
|
|
CurrentEntry, UcrDescriptor->Address);
|
|
|
|
return FALSE;
|
|
}
|
|
else
|
|
{
|
|
UnCommittedPages += (ULONG)(UcrDescriptor->Size / PAGE_SIZE);
|
|
UnCommittedRanges++;
|
|
|
|
CurrentEntry = (PHEAP_ENTRY)((PCHAR)UcrDescriptor->Address + UcrDescriptor->Size);
|
|
|
|
/* Go to the next UCR descriptor */
|
|
UcrEntry = UcrEntry->Flink;
|
|
if (UcrEntry == &Segment->UCRSegmentList)
|
|
{
|
|
UcrEntry = NULL;
|
|
UcrDescriptor = NULL;
|
|
}
|
|
else
|
|
{
|
|
UcrDescriptor = CONTAINING_RECORD(UcrEntry, HEAP_UCR_DESCRIPTOR, SegmentEntry);
|
|
}
|
|
}
|
|
|
|
break;
|
|
}
|
|
|
|
/* Advance to the next entry */
|
|
CurrentEntry = (PHEAP_ENTRY)((PCHAR)CurrentEntry + Size);
|
|
}
|
|
}
|
|
|
|
/* Check total numbers of UCP and UCR */
|
|
if (Segment->NumberOfUnCommittedPages != UnCommittedPages)
|
|
{
|
|
DPRINT1("HEAP: Segment %p NumberOfUnCommittedPages is invalid (%x != %x)\n",
|
|
Segment, Segment->NumberOfUnCommittedPages, UnCommittedPages);
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
if (Segment->NumberOfUnCommittedRanges != UnCommittedRanges)
|
|
{
|
|
DPRINT1("HEAP: Segment %p NumberOfUnCommittedRanges is invalid (%x != %x)\n",
|
|
Segment, Segment->NumberOfUnCommittedRanges, UnCommittedRanges);
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
BOOLEAN NTAPI
|
|
RtlpValidateHeap(PHEAP Heap,
|
|
BOOLEAN ForceValidation)
|
|
{
|
|
PHEAP_SEGMENT Segment;
|
|
BOOLEAN EmptyList;
|
|
UCHAR SegmentOffset;
|
|
SIZE_T Size, TotalFreeSize;
|
|
ULONG PreviousSize;
|
|
PHEAP_VIRTUAL_ALLOC_ENTRY VirtualAllocBlock;
|
|
PLIST_ENTRY ListHead, NextEntry;
|
|
PHEAP_FREE_ENTRY FreeEntry;
|
|
ULONG FreeBlocksCount, FreeListEntriesCount;
|
|
|
|
/* Check headers */
|
|
if (!RtlpValidateHeapHeaders(Heap, FALSE))
|
|
return FALSE;
|
|
|
|
/* Skip validation if it's not needed */
|
|
if (!ForceValidation && !(Heap->Flags & HEAP_VALIDATE_ALL_ENABLED))
|
|
return TRUE;
|
|
|
|
/* Check free lists bitmaps */
|
|
FreeListEntriesCount = 0;
|
|
ListHead = &Heap->FreeLists[0];
|
|
|
|
for (Size = 0; Size < HEAP_FREELISTS; Size++)
|
|
{
|
|
if (Size)
|
|
{
|
|
/* This is a dedicated list. Check if it's empty */
|
|
EmptyList = IsListEmpty(ListHead);
|
|
|
|
if (Heap->u.FreeListsInUseBytes[Size >> 3] & (1 << (Size & 7)))
|
|
{
|
|
if (EmptyList)
|
|
{
|
|
DPRINT1("HEAP: Empty %x-free list marked as non-empty\n", Size);
|
|
return FALSE;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if (!EmptyList)
|
|
{
|
|
DPRINT1("HEAP: Non-empty %x-free list marked as empty\n", Size);
|
|
return FALSE;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Now check this list entries */
|
|
NextEntry = ListHead->Flink;
|
|
PreviousSize = 0;
|
|
|
|
while (ListHead != NextEntry)
|
|
{
|
|
FreeEntry = CONTAINING_RECORD(NextEntry, HEAP_FREE_ENTRY, FreeList);
|
|
NextEntry = NextEntry->Flink;
|
|
|
|
/* If there is an in-use entry in a free list - that's quite a big problem */
|
|
if (FreeEntry->Flags & HEAP_ENTRY_BUSY)
|
|
{
|
|
DPRINT1("HEAP: %Ix-dedicated list free element %p is marked in-use\n", Size, FreeEntry);
|
|
return FALSE;
|
|
}
|
|
|
|
/* Check sizes according to that specific list's size */
|
|
if ((Size == 0) && (FreeEntry->Size < HEAP_FREELISTS))
|
|
{
|
|
DPRINT1("HEAP: Non dedicated list free element %p has size %x which would fit a dedicated list\n", FreeEntry, FreeEntry->Size);
|
|
return FALSE;
|
|
}
|
|
else if (Size && (FreeEntry->Size != Size))
|
|
{
|
|
DPRINT1("HEAP: %Ix-dedicated list free element %p has incorrect size %x\n", Size, FreeEntry, FreeEntry->Size);
|
|
return FALSE;
|
|
}
|
|
else if ((Size == 0) && (FreeEntry->Size < PreviousSize))
|
|
{
|
|
DPRINT1("HEAP: Non dedicated list free element %p is not put in order\n", FreeEntry);
|
|
return FALSE;
|
|
}
|
|
|
|
/* Remember previous size*/
|
|
PreviousSize = FreeEntry->Size;
|
|
|
|
/* Add up to the total amount of free entries */
|
|
FreeListEntriesCount++;
|
|
}
|
|
|
|
/* Go to the head of the next free list */
|
|
ListHead++;
|
|
}
|
|
|
|
/* Check big allocations */
|
|
ListHead = &Heap->VirtualAllocdBlocks;
|
|
NextEntry = ListHead->Flink;
|
|
|
|
while (ListHead != NextEntry)
|
|
{
|
|
VirtualAllocBlock = CONTAINING_RECORD(NextEntry, HEAP_VIRTUAL_ALLOC_ENTRY, Entry);
|
|
|
|
/* We can only check the fill pattern */
|
|
if (VirtualAllocBlock->BusyBlock.Flags & HEAP_ENTRY_FILL_PATTERN)
|
|
{
|
|
if (!RtlpCheckInUsePattern(&VirtualAllocBlock->BusyBlock))
|
|
return FALSE;
|
|
}
|
|
|
|
NextEntry = NextEntry->Flink;
|
|
}
|
|
|
|
/* Check all segments */
|
|
FreeBlocksCount = 0;
|
|
TotalFreeSize = 0;
|
|
|
|
for (SegmentOffset = 0; SegmentOffset < HEAP_SEGMENTS; SegmentOffset++)
|
|
{
|
|
Segment = Heap->Segments[SegmentOffset];
|
|
|
|
/* Go to the next one if there is no segment */
|
|
if (!Segment) continue;
|
|
|
|
if (!RtlpValidateHeapSegment(Heap,
|
|
Segment,
|
|
SegmentOffset,
|
|
&FreeBlocksCount,
|
|
&TotalFreeSize,
|
|
NULL,
|
|
NULL))
|
|
{
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
if (FreeListEntriesCount != FreeBlocksCount)
|
|
{
|
|
DPRINT1("HEAP: Free blocks count in arena (%lu) does not match free blocks number in the free lists (%lu)\n", FreeBlocksCount, FreeListEntriesCount);
|
|
return FALSE;
|
|
}
|
|
|
|
if (Heap->TotalFreeSize != TotalFreeSize)
|
|
{
|
|
DPRINT1("HEAP: Total size of free blocks in arena (%Iu) does not equal to the one in heap header (%Iu)\n", TotalFreeSize, Heap->TotalFreeSize);
|
|
return FALSE;
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/***********************************************************************
|
|
* RtlValidateHeap
|
|
* Validates a specified heap.
|
|
*
|
|
* PARAMS
|
|
* Heap [in] Handle to the heap
|
|
* Flags [in] Bit flags that control access during operation
|
|
* Block [in] Optional pointer to memory block to validate
|
|
*
|
|
* NOTES
|
|
* Flags is ignored.
|
|
*
|
|
* RETURNS
|
|
* TRUE: Success
|
|
* FALSE: Failure
|
|
*
|
|
* @implemented
|
|
*/
|
|
BOOLEAN NTAPI RtlValidateHeap(
|
|
HANDLE HeapPtr,
|
|
ULONG Flags,
|
|
PVOID Block
|
|
)
|
|
{
|
|
PHEAP Heap = (PHEAP)HeapPtr;
|
|
BOOLEAN HeapLocked = FALSE;
|
|
BOOLEAN HeapValid;
|
|
|
|
/* Check for page heap */
|
|
if (Heap->ForceFlags & HEAP_FLAG_PAGE_ALLOCS)
|
|
return RtlpDebugPageHeapValidate(HeapPtr, Flags, Block);
|
|
|
|
/* Check signature */
|
|
if (Heap->Signature != HEAP_SIGNATURE)
|
|
{
|
|
DPRINT1("HEAP: Signature %lx is invalid for heap %p\n", Heap->Signature, Heap);
|
|
return FALSE;
|
|
}
|
|
|
|
/* Force flags */
|
|
Flags = Heap->ForceFlags;
|
|
|
|
/* Acquire the lock if necessary */
|
|
if (!(Flags & HEAP_NO_SERIALIZE))
|
|
{
|
|
RtlEnterHeapLock(Heap->LockVariable, TRUE);
|
|
HeapLocked = TRUE;
|
|
}
|
|
|
|
/* Either validate whole heap or just one entry */
|
|
if (!Block)
|
|
HeapValid = RtlpValidateHeap(Heap, TRUE);
|
|
else
|
|
HeapValid = RtlpValidateHeapEntry(Heap, (PHEAP_ENTRY)Block - 1);
|
|
|
|
/* Unlock if it's lockable */
|
|
if (HeapLocked)
|
|
{
|
|
RtlLeaveHeapLock(Heap->LockVariable);
|
|
}
|
|
|
|
return HeapValid;
|
|
}
|
|
|
|
/*
|
|
* @implemented
|
|
*/
|
|
NTSTATUS NTAPI
|
|
RtlEnumProcessHeaps(PHEAP_ENUMERATION_ROUTINE HeapEnumerationRoutine,
|
|
PVOID lParam)
|
|
{
|
|
UNIMPLEMENTED;
|
|
return STATUS_NOT_IMPLEMENTED;
|
|
}
|
|
|
|
|
|
/*
|
|
* @implemented
|
|
*/
|
|
ULONG NTAPI
|
|
RtlGetProcessHeaps(ULONG count,
|
|
HANDLE *heaps)
|
|
{
|
|
UNIMPLEMENTED;
|
|
return 0;
|
|
}
|
|
|
|
|
|
/*
|
|
* @implemented
|
|
*/
|
|
BOOLEAN NTAPI
|
|
RtlValidateProcessHeaps(VOID)
|
|
{
|
|
UNIMPLEMENTED;
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
/*
|
|
* @unimplemented
|
|
*/
|
|
BOOLEAN NTAPI
|
|
RtlZeroHeap(
|
|
IN PVOID HeapHandle,
|
|
IN ULONG Flags
|
|
)
|
|
{
|
|
UNIMPLEMENTED;
|
|
return FALSE;
|
|
}
|
|
|
|
/*
|
|
* @implemented
|
|
*/
|
|
BOOLEAN
|
|
NTAPI
|
|
RtlSetUserValueHeap(IN PVOID HeapHandle,
|
|
IN ULONG Flags,
|
|
IN PVOID BaseAddress,
|
|
IN PVOID UserValue)
|
|
{
|
|
PHEAP Heap = (PHEAP)HeapHandle;
|
|
PHEAP_ENTRY HeapEntry;
|
|
PHEAP_ENTRY_EXTRA Extra;
|
|
BOOLEAN HeapLocked = FALSE, ValueSet = FALSE;
|
|
|
|
/* Force flags */
|
|
Flags |= Heap->Flags;
|
|
|
|
/* Call special heap */
|
|
if (RtlpHeapIsSpecial(Flags))
|
|
return RtlDebugSetUserValueHeap(Heap, Flags, BaseAddress, UserValue);
|
|
|
|
/* Lock if it's lockable */
|
|
if (!(Heap->Flags & HEAP_NO_SERIALIZE))
|
|
{
|
|
RtlEnterHeapLock(Heap->LockVariable, TRUE);
|
|
HeapLocked = TRUE;
|
|
}
|
|
|
|
/* Get a pointer to the entry */
|
|
HeapEntry = (PHEAP_ENTRY)BaseAddress - 1;
|
|
|
|
/* If it's a free entry - return error */
|
|
if (!(HeapEntry->Flags & HEAP_ENTRY_BUSY))
|
|
{
|
|
RtlSetLastWin32ErrorAndNtStatusFromNtStatus(STATUS_INVALID_PARAMETER);
|
|
|
|
/* Release the heap lock if it was acquired */
|
|
if (HeapLocked)
|
|
RtlLeaveHeapLock(Heap->LockVariable);
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
/* Check if this entry has an extra stuff associated with it */
|
|
if (HeapEntry->Flags & HEAP_ENTRY_EXTRA_PRESENT)
|
|
{
|
|
/* Use extra to store the value */
|
|
Extra = RtlpGetExtraStuffPointer(HeapEntry);
|
|
Extra->Settable = (ULONG_PTR)UserValue;
|
|
|
|
/* Indicate that value was set */
|
|
ValueSet = TRUE;
|
|
}
|
|
|
|
/* Release the heap lock if it was acquired */
|
|
if (HeapLocked)
|
|
RtlLeaveHeapLock(Heap->LockVariable);
|
|
|
|
return ValueSet;
|
|
}
|
|
|
|
/*
|
|
* @implemented
|
|
*/
|
|
BOOLEAN
|
|
NTAPI
|
|
RtlSetUserFlagsHeap(IN PVOID HeapHandle,
|
|
IN ULONG Flags,
|
|
IN PVOID BaseAddress,
|
|
IN ULONG UserFlagsReset,
|
|
IN ULONG UserFlagsSet)
|
|
{
|
|
PHEAP Heap = (PHEAP)HeapHandle;
|
|
PHEAP_ENTRY HeapEntry;
|
|
BOOLEAN HeapLocked = FALSE;
|
|
|
|
/* Force flags */
|
|
Flags |= Heap->Flags;
|
|
|
|
/* Call special heap */
|
|
if (RtlpHeapIsSpecial(Flags))
|
|
return RtlDebugSetUserFlagsHeap(Heap, Flags, BaseAddress, UserFlagsReset, UserFlagsSet);
|
|
|
|
/* Lock if it's lockable */
|
|
if (!(Heap->Flags & HEAP_NO_SERIALIZE))
|
|
{
|
|
RtlEnterHeapLock(Heap->LockVariable, TRUE);
|
|
HeapLocked = TRUE;
|
|
}
|
|
|
|
/* Get a pointer to the entry */
|
|
HeapEntry = (PHEAP_ENTRY)BaseAddress - 1;
|
|
|
|
/* If it's a free entry - return error */
|
|
if (!(HeapEntry->Flags & HEAP_ENTRY_BUSY))
|
|
{
|
|
RtlSetLastWin32ErrorAndNtStatusFromNtStatus(STATUS_INVALID_PARAMETER);
|
|
|
|
/* Release the heap lock if it was acquired */
|
|
if (HeapLocked)
|
|
RtlLeaveHeapLock(Heap->LockVariable);
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
/* Set / reset flags */
|
|
HeapEntry->Flags &= ~(UserFlagsReset >> 4);
|
|
HeapEntry->Flags |= (UserFlagsSet >> 4);
|
|
|
|
/* Release the heap lock if it was acquired */
|
|
if (HeapLocked)
|
|
RtlLeaveHeapLock(Heap->LockVariable);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/*
|
|
* @implemented
|
|
*/
|
|
BOOLEAN
|
|
NTAPI
|
|
RtlGetUserInfoHeap(IN PVOID HeapHandle,
|
|
IN ULONG Flags,
|
|
IN PVOID BaseAddress,
|
|
OUT PVOID *UserValue,
|
|
OUT PULONG UserFlags)
|
|
{
|
|
PHEAP Heap = (PHEAP)HeapHandle;
|
|
PHEAP_ENTRY HeapEntry;
|
|
PHEAP_ENTRY_EXTRA Extra;
|
|
BOOLEAN HeapLocked = FALSE;
|
|
|
|
/* Force flags */
|
|
Flags |= Heap->Flags;
|
|
|
|
/* Call special heap */
|
|
if (RtlpHeapIsSpecial(Flags))
|
|
return RtlDebugGetUserInfoHeap(Heap, Flags, BaseAddress, UserValue, UserFlags);
|
|
|
|
/* Lock if it's lockable */
|
|
if (!(Heap->Flags & HEAP_NO_SERIALIZE))
|
|
{
|
|
RtlEnterHeapLock(Heap->LockVariable, TRUE);
|
|
HeapLocked = TRUE;
|
|
}
|
|
|
|
/* Get a pointer to the entry */
|
|
HeapEntry = (PHEAP_ENTRY)BaseAddress - 1;
|
|
|
|
/* If it's a free entry - return error */
|
|
if (!(HeapEntry->Flags & HEAP_ENTRY_BUSY))
|
|
{
|
|
RtlSetLastWin32ErrorAndNtStatusFromNtStatus(STATUS_INVALID_PARAMETER);
|
|
|
|
/* Release the heap lock if it was acquired */
|
|
if (HeapLocked)
|
|
RtlLeaveHeapLock(Heap->LockVariable);
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
/* Check if this entry has an extra stuff associated with it */
|
|
if (HeapEntry->Flags & HEAP_ENTRY_EXTRA_PRESENT)
|
|
{
|
|
/* Get pointer to extra data */
|
|
Extra = RtlpGetExtraStuffPointer(HeapEntry);
|
|
|
|
/* Pass user value */
|
|
if (UserValue)
|
|
*UserValue = (PVOID)Extra->Settable;
|
|
}
|
|
|
|
/* Decode and return user flags */
|
|
if (UserFlags)
|
|
*UserFlags = (HeapEntry->Flags & HEAP_ENTRY_SETTABLE_FLAGS) << 4;
|
|
|
|
/* Release the heap lock if it was acquired */
|
|
if (HeapLocked)
|
|
RtlLeaveHeapLock(Heap->LockVariable);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/*
|
|
* @unimplemented
|
|
*/
|
|
NTSTATUS
|
|
NTAPI
|
|
RtlUsageHeap(IN HANDLE Heap,
|
|
IN ULONG Flags,
|
|
OUT PRTL_HEAP_USAGE Usage)
|
|
{
|
|
/* TODO */
|
|
UNIMPLEMENTED;
|
|
return STATUS_NOT_IMPLEMENTED;
|
|
}
|
|
|
|
PWSTR
|
|
NTAPI
|
|
RtlQueryTagHeap(IN PVOID HeapHandle,
|
|
IN ULONG Flags,
|
|
IN USHORT TagIndex,
|
|
IN BOOLEAN ResetCounters,
|
|
OUT PRTL_HEAP_TAG_INFO HeapTagInfo)
|
|
{
|
|
/* TODO */
|
|
UNIMPLEMENTED;
|
|
return NULL;
|
|
}
|
|
|
|
ULONG
|
|
NTAPI
|
|
RtlExtendHeap(IN HANDLE Heap,
|
|
IN ULONG Flags,
|
|
IN PVOID P,
|
|
IN SIZE_T Size)
|
|
{
|
|
/* TODO */
|
|
UNIMPLEMENTED;
|
|
return 0;
|
|
}
|
|
|
|
ULONG
|
|
NTAPI
|
|
RtlCreateTagHeap(IN HANDLE HeapHandle,
|
|
IN ULONG Flags,
|
|
IN PWSTR TagName,
|
|
IN PWSTR TagSubName)
|
|
{
|
|
/* TODO */
|
|
UNIMPLEMENTED;
|
|
return 0;
|
|
}
|
|
|
|
NTSTATUS
|
|
NTAPI
|
|
RtlWalkHeap(IN HANDLE HeapHandle,
|
|
IN PVOID HeapEntry)
|
|
{
|
|
UNIMPLEMENTED;
|
|
return STATUS_NOT_IMPLEMENTED;
|
|
}
|
|
|
|
PVOID
|
|
NTAPI
|
|
RtlProtectHeap(IN PVOID HeapHandle,
|
|
IN BOOLEAN ReadOnly)
|
|
{
|
|
UNIMPLEMENTED;
|
|
return NULL;
|
|
}
|
|
|
|
NTSTATUS
|
|
NTAPI
|
|
RtlSetHeapInformation(IN HANDLE HeapHandle OPTIONAL,
|
|
IN HEAP_INFORMATION_CLASS HeapInformationClass,
|
|
IN PVOID HeapInformation,
|
|
IN SIZE_T HeapInformationLength)
|
|
{
|
|
/* Setting heap information is not really supported except for enabling LFH */
|
|
if (HeapInformationClass == HeapCompatibilityInformation)
|
|
{
|
|
/* Check buffer length */
|
|
if (HeapInformationLength < sizeof(ULONG))
|
|
{
|
|
/* The provided buffer is too small */
|
|
return STATUS_BUFFER_TOO_SMALL;
|
|
}
|
|
|
|
/* Check for a special magic value for enabling LFH */
|
|
if (*(PULONG)HeapInformation != 2)
|
|
{
|
|
return STATUS_UNSUCCESSFUL;
|
|
}
|
|
|
|
DPRINT1("RtlSetHeapInformation() needs to enable LFH\n");
|
|
return STATUS_SUCCESS;
|
|
}
|
|
|
|
return STATUS_SUCCESS;
|
|
}
|
|
|
|
NTSTATUS
|
|
NTAPI
|
|
RtlQueryHeapInformation(HANDLE HeapHandle,
|
|
HEAP_INFORMATION_CLASS HeapInformationClass,
|
|
PVOID HeapInformation,
|
|
SIZE_T HeapInformationLength,
|
|
PSIZE_T ReturnLength OPTIONAL)
|
|
{
|
|
PHEAP Heap = (PHEAP)HeapHandle;
|
|
|
|
/* Only HeapCompatibilityInformation is supported */
|
|
if (HeapInformationClass == HeapCompatibilityInformation)
|
|
{
|
|
/* Set result length */
|
|
if (ReturnLength)
|
|
*ReturnLength = sizeof(ULONG);
|
|
|
|
/* Check buffer length */
|
|
if (HeapInformationLength < sizeof(ULONG))
|
|
{
|
|
/* It's too small, return needed length */
|
|
return STATUS_BUFFER_TOO_SMALL;
|
|
}
|
|
|
|
/* Return front end heap type */
|
|
*(PULONG)HeapInformation = Heap->FrontEndHeapType;
|
|
|
|
return STATUS_SUCCESS;
|
|
}
|
|
|
|
return STATUS_UNSUCCESSFUL;
|
|
}
|
|
|
|
NTSTATUS
|
|
NTAPI
|
|
RtlMultipleAllocateHeap(IN PVOID HeapHandle,
|
|
IN ULONG Flags,
|
|
IN SIZE_T Size,
|
|
IN ULONG Count,
|
|
OUT PVOID *Array)
|
|
{
|
|
UNIMPLEMENTED;
|
|
return 0;
|
|
}
|
|
|
|
NTSTATUS
|
|
NTAPI
|
|
RtlMultipleFreeHeap(IN PVOID HeapHandle,
|
|
IN ULONG Flags,
|
|
IN ULONG Count,
|
|
OUT PVOID *Array)
|
|
{
|
|
UNIMPLEMENTED;
|
|
return 0;
|
|
}
|
|
|
|
/* EOF */
|