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Sweden-Number/memory/heap.c

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/*
* Win32 heap functions
*
* Copyright 1996 Alexandre Julliard
* Copyright 1998 Ulrich Weigand
*/
#include "config.h"
#include <assert.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include "winbase.h"
#include "wine/winbase16.h"
#include "winerror.h"
#include "winnt.h"
#include "ntddk.h"
#include "wine/unicode.h"
#include "selectors.h"
#include "global.h"
#include "thread.h"
#include "toolhelp.h"
#include "debugtools.h"
DEFAULT_DEBUG_CHANNEL(heap);
/* address where we try to map the system heap */
#define SYSTEM_HEAP_BASE ((void*)0x65430000)
#define SYSTEM_HEAP_SIZE 0x100000 /* Default heap size = 1Mb */
#define HTABLE_SIZE 0x10000
#define HTABLE_PAGESIZE 0x1000
#define HTABLE_NPAGES (HTABLE_SIZE / HTABLE_PAGESIZE)
#include "pshpack1.h"
typedef struct _LOCAL32HEADER
{
WORD freeListFirst[HTABLE_NPAGES];
WORD freeListSize[HTABLE_NPAGES];
WORD freeListLast[HTABLE_NPAGES];
DWORD selectorTableOffset;
WORD selectorTableSize;
WORD selectorDelta;
DWORD segment;
LPBYTE base;
DWORD limit;
DWORD flags;
DWORD magic;
HANDLE heap;
} LOCAL32HEADER;
#include "poppack.h"
#define LOCAL32_MAGIC ((DWORD)('L' | ('H'<<8) | ('3'<<16) | ('2'<<24)))
static HANDLE systemHeap; /* globally shared heap */
/***********************************************************************
* HEAP_CreateSystemHeap
*
* Create the system heap.
*/
inline static HANDLE HEAP_CreateSystemHeap(void)
{
int created;
void *base;
HANDLE map, event;
UNICODE_STRING event_name;
OBJECT_ATTRIBUTES event_attr;
if (!(map = CreateFileMappingA( INVALID_HANDLE_VALUE, NULL, SEC_COMMIT | PAGE_READWRITE,
0, SYSTEM_HEAP_SIZE, "__SystemHeap" ))) return 0;
created = (GetLastError() != ERROR_ALREADY_EXISTS);
if (!(base = MapViewOfFileEx( map, FILE_MAP_ALL_ACCESS, 0, 0, 0, SYSTEM_HEAP_BASE )))
{
/* pre-defined address not available */
ERR( "system heap base address %p not available\n", SYSTEM_HEAP_BASE );
return 0;
}
/* create the system heap event */
RtlCreateUnicodeStringFromAsciiz( &event_name, "__SystemHeapEvent" );
event_attr.Length = sizeof(event_attr);
event_attr.RootDirectory = 0;
event_attr.ObjectName = &event_name;
event_attr.Attributes = 0;
event_attr.SecurityDescriptor = NULL;
event_attr.SecurityQualityOfService = NULL;
NtCreateEvent( &event, EVENT_ALL_ACCESS, &event_attr, TRUE, FALSE );
if (created) /* newly created heap */
{
systemHeap = RtlCreateHeap( HEAP_SHARED, base, SYSTEM_HEAP_SIZE,
SYSTEM_HEAP_SIZE, NULL, NULL );
NtSetEvent( event, NULL );
}
else
{
/* wait for the heap to be initialized */
WaitForSingleObject( event, INFINITE );
}
CloseHandle( map );
return systemHeap;
}
/***********************************************************************
* HeapCreate (KERNEL32.@)
* RETURNS
* Handle of heap: Success
* NULL: Failure
*/
HANDLE WINAPI HeapCreate(
DWORD flags, /* [in] Heap allocation flag */
DWORD initialSize, /* [in] Initial heap size */
DWORD maxSize /* [in] Maximum heap size */
) {
HANDLE ret;
if ( flags & HEAP_SHARED )
{
if (!systemHeap) HEAP_CreateSystemHeap();
else WARN( "Shared Heap requested, returning system heap.\n" );
ret = systemHeap;
}
else
{
ret = RtlCreateHeap( flags, NULL, maxSize, initialSize, NULL, NULL );
if (!ret) SetLastError( ERROR_NOT_ENOUGH_MEMORY );
}
return ret;
}
/***********************************************************************
* HeapDestroy (KERNEL32.@)
* RETURNS
* TRUE: Success
* FALSE: Failure
*/
BOOL WINAPI HeapDestroy( HANDLE heap /* [in] Handle of heap */ )
{
if (heap == systemHeap)
{
WARN( "attempt to destroy system heap, returning TRUE!\n" );
return TRUE;
}
if (!RtlDestroyHeap( heap )) return TRUE;
SetLastError( ERROR_INVALID_HANDLE );
return FALSE;
}
/***********************************************************************
* HeapCompact (KERNEL32.@)
*/
DWORD WINAPI HeapCompact( HANDLE heap, DWORD flags )
{
return RtlCompactHeap( heap, flags );
}
/***********************************************************************
* HeapLock (KERNEL32.@)
* Attempts to acquire the critical section object for a specified heap.
*
* RETURNS
* TRUE: Success
* FALSE: Failure
*/
BOOL WINAPI HeapLock(
HANDLE heap /* [in] Handle of heap to lock for exclusive access */
) {
return RtlLockHeap( heap );
}
/***********************************************************************
* HeapUnlock (KERNEL32.@)
* Releases ownership of the critical section object.
*
* RETURNS
* TRUE: Success
* FALSE: Failure
*/
BOOL WINAPI HeapUnlock(
HANDLE heap /* [in] Handle to the heap to unlock */
) {
return RtlUnlockHeap( heap );
}
/***********************************************************************
* HeapValidate (KERNEL32.@)
* Validates a specified heap.
*
* NOTES
* Flags is ignored.
*
* RETURNS
* TRUE: Success
* FALSE: Failure
*/
BOOL WINAPI HeapValidate(
HANDLE heap, /* [in] Handle to the heap */
DWORD flags, /* [in] Bit flags that control access during operation */
LPCVOID block /* [in] Optional pointer to memory block to validate */
) {
return RtlValidateHeap( heap, flags, block );
}
/***********************************************************************
* HeapWalk (KERNEL32.@)
* Enumerates the memory blocks in a specified heap.
*
* TODO
* - handling of PROCESS_HEAP_ENTRY_MOVEABLE and
* PROCESS_HEAP_ENTRY_DDESHARE (needs heap.c support)
*
* RETURNS
* TRUE: Success
* FALSE: Failure
*/
BOOL WINAPI HeapWalk(
HANDLE heap, /* [in] Handle to heap to enumerate */
LPPROCESS_HEAP_ENTRY entry /* [out] Pointer to structure of enumeration info */
) {
NTSTATUS ret = RtlWalkHeap( heap, entry );
if (ret) SetLastError( RtlNtStatusToDosError(ret) );
return !ret;
}
/***********************************************************************
* GetProcessHeap (KERNEL32.@)
*/
HANDLE WINAPI GetProcessHeap(void)
{
HANDLE *pdb = (HANDLE *)NtCurrentTeb()->process;
return pdb[0x18 / sizeof(HANDLE)]; /* get dword at offset 0x18 in pdb */
}
/***********************************************************************
* GetProcessHeaps (KERNEL32.@)
*/
DWORD WINAPI GetProcessHeaps( DWORD count, HANDLE *heaps )
{
return RtlGetProcessHeaps( count, heaps );
}
/***********************************************************************
* 32-bit local heap functions (Win95; undocumented)
*/
/***********************************************************************
* K208 (KERNEL.208)
*/
HANDLE WINAPI Local32Init16( WORD segment, DWORD tableSize,
DWORD heapSize, DWORD flags )
{
DWORD totSize, segSize = 0;
LPBYTE base;
LOCAL32HEADER *header;
HANDLE heap;
WORD *selectorTable;
WORD selectorEven, selectorOdd;
int i, nrBlocks;
/* Determine new heap size */
if ( segment )
{
if ( (segSize = GetSelectorLimit16( segment )) == 0 )
return 0;
else
segSize++;
}
if ( heapSize == -1L )
heapSize = 1024L*1024L; /* FIXME */
heapSize = (heapSize + 0xffff) & 0xffff0000;
segSize = (segSize + 0x0fff) & 0xfffff000;
totSize = segSize + HTABLE_SIZE + heapSize;
/* Allocate memory and initialize heap */
if ( !(base = VirtualAlloc( NULL, totSize, MEM_RESERVE, PAGE_READWRITE )) )
return 0;
if ( !VirtualAlloc( base, segSize + HTABLE_PAGESIZE,
MEM_COMMIT, PAGE_READWRITE ) )
{
VirtualFree( base, 0, MEM_RELEASE );
return 0;
}
if (!(heap = RtlCreateHeap( 0, base + segSize + HTABLE_SIZE, heapSize, 0x10000, NULL, NULL )))
{
VirtualFree( base, 0, MEM_RELEASE );
return 0;
}
/* Set up header and handle table */
header = (LOCAL32HEADER *)(base + segSize);
header->base = base;
header->limit = HTABLE_PAGESIZE-1;
header->flags = 0;
header->magic = LOCAL32_MAGIC;
header->heap = heap;
header->freeListFirst[0] = sizeof(LOCAL32HEADER);
header->freeListLast[0] = HTABLE_PAGESIZE - 4;
header->freeListSize[0] = (HTABLE_PAGESIZE - sizeof(LOCAL32HEADER)) / 4;
for (i = header->freeListFirst[0]; i < header->freeListLast[0]; i += 4)
*(DWORD *)((LPBYTE)header + i) = i+4;
header->freeListFirst[1] = 0xffff;
/* Set up selector table */
nrBlocks = (totSize + 0x7fff) >> 15;
selectorTable = (LPWORD) HeapAlloc( header->heap, 0, nrBlocks * 2 );
selectorEven = SELECTOR_AllocBlock( base, totSize, WINE_LDT_FLAGS_DATA );
selectorOdd = SELECTOR_AllocBlock( base + 0x8000, totSize - 0x8000, WINE_LDT_FLAGS_DATA );
if ( !selectorTable || !selectorEven || !selectorOdd )
{
if ( selectorTable ) HeapFree( header->heap, 0, selectorTable );
if ( selectorEven ) SELECTOR_FreeBlock( selectorEven );
if ( selectorOdd ) SELECTOR_FreeBlock( selectorOdd );
HeapDestroy( header->heap );
VirtualFree( base, 0, MEM_RELEASE );
return 0;
}
header->selectorTableOffset = (LPBYTE)selectorTable - header->base;
header->selectorTableSize = nrBlocks * 4; /* ??? Win95 does it this way! */
header->selectorDelta = selectorEven - selectorOdd;
header->segment = segment? segment : selectorEven;
for (i = 0; i < nrBlocks; i++)
selectorTable[i] = (i & 1)? selectorOdd + ((i >> 1) << __AHSHIFT)
: selectorEven + ((i >> 1) << __AHSHIFT);
/* Move old segment */
if ( segment )
{
/* FIXME: This is somewhat ugly and relies on implementation
details about 16-bit global memory handles ... */
LPBYTE oldBase = (LPBYTE)GetSelectorBase( segment );
memcpy( base, oldBase, segSize );
GLOBAL_MoveBlock( segment, base, totSize );
HeapFree( GetProcessHeap(), 0, oldBase );
}
return (HANDLE)header;
}
/***********************************************************************
* Local32_SearchHandle
*/
static LPDWORD Local32_SearchHandle( LOCAL32HEADER *header, DWORD addr )
{
LPDWORD handle;
for ( handle = (LPDWORD)((LPBYTE)header + sizeof(LOCAL32HEADER));
handle < (LPDWORD)((LPBYTE)header + header->limit);
handle++)
{
if (*handle == addr)
return handle;
}
return NULL;
}
/***********************************************************************
* Local32_ToHandle
*/
static VOID Local32_ToHandle( LOCAL32HEADER *header, INT16 type,
DWORD addr, LPDWORD *handle, LPBYTE *ptr )
{
*handle = NULL;
*ptr = NULL;
switch (type)
{
case -2: /* 16:16 pointer, no handles */
*ptr = MapSL( addr );
*handle = (LPDWORD)*ptr;
break;
case -1: /* 32-bit offset, no handles */
*ptr = header->base + addr;
*handle = (LPDWORD)*ptr;
break;
case 0: /* handle */
if ( addr >= sizeof(LOCAL32HEADER)
&& addr < header->limit && !(addr & 3)
&& *(LPDWORD)((LPBYTE)header + addr) >= HTABLE_SIZE )
{
*handle = (LPDWORD)((LPBYTE)header + addr);
*ptr = header->base + **handle;
}
break;
case 1: /* 16:16 pointer */
*ptr = MapSL( addr );
*handle = Local32_SearchHandle( header, *ptr - header->base );
break;
case 2: /* 32-bit offset */
*ptr = header->base + addr;
*handle = Local32_SearchHandle( header, *ptr - header->base );
break;
}
}
/***********************************************************************
* Local32_FromHandle
*/
static VOID Local32_FromHandle( LOCAL32HEADER *header, INT16 type,
DWORD *addr, LPDWORD handle, LPBYTE ptr )
{
switch (type)
{
case -2: /* 16:16 pointer */
case 1:
{
WORD *selTable = (LPWORD)(header->base + header->selectorTableOffset);
DWORD offset = (LPBYTE)ptr - header->base;
*addr = MAKELONG( offset & 0x7fff, selTable[offset >> 15] );
}
break;
case -1: /* 32-bit offset */
case 2:
*addr = ptr - header->base;
break;
case 0: /* handle */
*addr = (LPBYTE)handle - (LPBYTE)header;
break;
}
}
/***********************************************************************
* K209 (KERNEL.209)
*/
DWORD WINAPI Local32Alloc16( HANDLE heap, DWORD size, INT16 type, DWORD flags )
{
LOCAL32HEADER *header = (LOCAL32HEADER *)heap;
LPDWORD handle;
LPBYTE ptr;
DWORD addr;
/* Allocate memory */
ptr = HeapAlloc( header->heap,
(flags & LMEM_MOVEABLE)? HEAP_ZERO_MEMORY : 0, size );
if (!ptr) return 0;
/* Allocate handle if requested */
if (type >= 0)
{
int page, i;
/* Find first page of handle table with free slots */
for (page = 0; page < HTABLE_NPAGES; page++)
if (header->freeListFirst[page] != 0)
break;
if (page == HTABLE_NPAGES)
{
WARN("Out of handles!\n" );
HeapFree( header->heap, 0, ptr );
return 0;
}
/* If virgin page, initialize it */
if (header->freeListFirst[page] == 0xffff)
{
if ( !VirtualAlloc( (LPBYTE)header + (page << 12),
0x1000, MEM_COMMIT, PAGE_READWRITE ) )
{
WARN("Cannot grow handle table!\n" );
HeapFree( header->heap, 0, ptr );
return 0;
}
header->limit += HTABLE_PAGESIZE;
header->freeListFirst[page] = 0;
header->freeListLast[page] = HTABLE_PAGESIZE - 4;
header->freeListSize[page] = HTABLE_PAGESIZE / 4;
for (i = 0; i < HTABLE_PAGESIZE; i += 4)
*(DWORD *)((LPBYTE)header + i) = i+4;
if (page < HTABLE_NPAGES-1)
header->freeListFirst[page+1] = 0xffff;
}
/* Allocate handle slot from page */
handle = (LPDWORD)((LPBYTE)header + header->freeListFirst[page]);
if (--header->freeListSize[page] == 0)
header->freeListFirst[page] = header->freeListLast[page] = 0;
else
header->freeListFirst[page] = *handle;
/* Store 32-bit offset in handle slot */
*handle = ptr - header->base;
}
else
{
handle = (LPDWORD)ptr;
header->flags |= 1;
}
/* Convert handle to requested output type */
Local32_FromHandle( header, type, &addr, handle, ptr );
return addr;
}
/***********************************************************************
* K210 (KERNEL.210)
*/
DWORD WINAPI Local32ReAlloc16( HANDLE heap, DWORD addr, INT16 type,
DWORD size, DWORD flags )
{
LOCAL32HEADER *header = (LOCAL32HEADER *)heap;
LPDWORD handle;
LPBYTE ptr;
if (!addr)
return Local32Alloc16( heap, size, type, flags );
/* Retrieve handle and pointer */
Local32_ToHandle( header, type, addr, &handle, &ptr );
if (!handle) return FALSE;
/* Reallocate memory block */
ptr = HeapReAlloc( header->heap,
(flags & LMEM_MOVEABLE)? HEAP_ZERO_MEMORY : 0,
ptr, size );
if (!ptr) return 0;
/* Modify handle */
if (type >= 0)
*handle = ptr - header->base;
else
handle = (LPDWORD)ptr;
/* Convert handle to requested output type */
Local32_FromHandle( header, type, &addr, handle, ptr );
return addr;
}
/***********************************************************************
* K211 (KERNEL.211)
*/
BOOL WINAPI Local32Free16( HANDLE heap, DWORD addr, INT16 type )
{
LOCAL32HEADER *header = (LOCAL32HEADER *)heap;
LPDWORD handle;
LPBYTE ptr;
/* Retrieve handle and pointer */
Local32_ToHandle( header, type, addr, &handle, &ptr );
if (!handle) return FALSE;
/* Free handle if necessary */
if (type >= 0)
{
int offset = (LPBYTE)handle - (LPBYTE)header;
int page = offset >> 12;
/* Return handle slot to page free list */
if (header->freeListSize[page]++ == 0)
header->freeListFirst[page] = header->freeListLast[page] = offset;
else
*(LPDWORD)((LPBYTE)header + header->freeListLast[page]) = offset,
header->freeListLast[page] = offset;
*handle = 0;
/* Shrink handle table when possible */
while (page > 0 && header->freeListSize[page] == HTABLE_PAGESIZE / 4)
{
if ( VirtualFree( (LPBYTE)header +
(header->limit & ~(HTABLE_PAGESIZE-1)),
HTABLE_PAGESIZE, MEM_DECOMMIT ) )
break;
header->limit -= HTABLE_PAGESIZE;
header->freeListFirst[page] = 0xffff;
page--;
}
}
/* Free memory */
return HeapFree( header->heap, 0, ptr );
}
/***********************************************************************
* K213 (KERNEL.213)
*/
DWORD WINAPI Local32Translate16( HANDLE heap, DWORD addr, INT16 type1, INT16 type2 )
{
LOCAL32HEADER *header = (LOCAL32HEADER *)heap;
LPDWORD handle;
LPBYTE ptr;
Local32_ToHandle( header, type1, addr, &handle, &ptr );
if (!handle) return 0;
Local32_FromHandle( header, type2, &addr, handle, ptr );
return addr;
}
/***********************************************************************
* K214 (KERNEL.214)
*/
DWORD WINAPI Local32Size16( HANDLE heap, DWORD addr, INT16 type )
{
LOCAL32HEADER *header = (LOCAL32HEADER *)heap;
LPDWORD handle;
LPBYTE ptr;
Local32_ToHandle( header, type, addr, &handle, &ptr );
if (!handle) return 0;
return HeapSize( header->heap, 0, ptr );
}
/***********************************************************************
* K215 (KERNEL.215)
*/
BOOL WINAPI Local32ValidHandle16( HANDLE heap, WORD addr )
{
LOCAL32HEADER *header = (LOCAL32HEADER *)heap;
LPDWORD handle;
LPBYTE ptr;
Local32_ToHandle( header, 0, addr, &handle, &ptr );
return handle != NULL;
}
/***********************************************************************
* K229 (KERNEL.229)
*/
WORD WINAPI Local32GetSegment16( HANDLE heap )
{
LOCAL32HEADER *header = (LOCAL32HEADER *)heap;
return header->segment;
}
/***********************************************************************
* Local32_GetHeap
*/
static LOCAL32HEADER *Local32_GetHeap( HGLOBAL16 handle )
{
WORD selector = GlobalHandleToSel16( handle );
DWORD base = GetSelectorBase( selector );
DWORD limit = GetSelectorLimit16( selector );
/* Hmmm. This is a somewhat stupid heuristic, but Windows 95 does
it this way ... */
if ( limit > 0x10000 && ((LOCAL32HEADER *)base)->magic == LOCAL32_MAGIC )
return (LOCAL32HEADER *)base;
base += 0x10000;
limit -= 0x10000;
if ( limit > 0x10000 && ((LOCAL32HEADER *)base)->magic == LOCAL32_MAGIC )
return (LOCAL32HEADER *)base;
return NULL;
}
/***********************************************************************
* Local32Info (KERNEL.444)
* Local32Info (TOOLHELP.84)
*/
BOOL16 WINAPI Local32Info16( LOCAL32INFO *pLocal32Info, HGLOBAL16 handle )
{
PROCESS_HEAP_ENTRY entry;
int i;
LOCAL32HEADER *header = Local32_GetHeap( handle );
if ( !header ) return FALSE;
if ( !pLocal32Info || pLocal32Info->dwSize < sizeof(LOCAL32INFO) )
return FALSE;
pLocal32Info->dwMemReserved = 0;
pLocal32Info->dwMemCommitted = 0;
pLocal32Info->dwTotalFree = 0;
pLocal32Info->dwLargestFreeBlock = 0;
while (HeapWalk( header->heap, &entry ))
{
if (entry.wFlags & PROCESS_HEAP_REGION)
{
pLocal32Info->dwMemReserved += entry.u.Region.dwCommittedSize
+ entry.u.Region.dwUnCommittedSize;
pLocal32Info->dwMemCommitted = entry.u.Region.dwCommittedSize;
}
else if (!(entry.wFlags & PROCESS_HEAP_ENTRY_BUSY))
{
DWORD size = entry.cbData + entry.cbOverhead;
pLocal32Info->dwTotalFree += size;
if (size > pLocal32Info->dwLargestFreeBlock) pLocal32Info->dwLargestFreeBlock = size;
}
}
pLocal32Info->dwcFreeHandles = 0;
for ( i = 0; i < HTABLE_NPAGES; i++ )
{
if ( header->freeListFirst[i] == 0xffff ) break;
pLocal32Info->dwcFreeHandles += header->freeListSize[i];
}
pLocal32Info->dwcFreeHandles += (HTABLE_NPAGES - i) * HTABLE_PAGESIZE/4;
return TRUE;
}
/***********************************************************************
* Local32First (KERNEL.445)
* Local32First (TOOLHELP.85)
*/
BOOL16 WINAPI Local32First16( LOCAL32ENTRY *pLocal32Entry, HGLOBAL16 handle )
{
FIXME("(%p, %04X): stub!\n", pLocal32Entry, handle );
return FALSE;
}
/***********************************************************************
* Local32Next (KERNEL.446)
* Local32Next (TOOLHELP.86)
*/
BOOL16 WINAPI Local32Next16( LOCAL32ENTRY *pLocal32Entry )
{
FIXME("(%p): stub!\n", pLocal32Entry );
return FALSE;
}
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