/* * Win32 heap functions * * Copyright 1996 Alexandre Julliard * Copyright 1998 Ulrich Weigand */ #include #include #include #include #include "config.h" #include "wine/winbase16.h" #include "wine/unicode.h" #include "selectors.h" #include "global.h" #include "winbase.h" #include "winerror.h" #include "winnt.h" #include "heap.h" #include "toolhelp.h" #include "debugtools.h" #include "winnls.h" DEFAULT_DEBUG_CHANNEL(heap); /* Note: the heap data structures are based on what Pietrek describes in his * book 'Windows 95 System Programming Secrets'. The layout is not exactly * the same, but could be easily adapted if it turns out some programs * require it. */ typedef struct tagARENA_INUSE { DWORD size; /* Block size; must be the first field */ WORD magic; /* Magic number */ WORD threadId; /* Allocating thread id */ void *callerEIP; /* EIP of caller upon allocation */ } ARENA_INUSE; typedef struct tagARENA_FREE { DWORD size; /* Block size; must be the first field */ WORD magic; /* Magic number */ WORD threadId; /* Freeing thread id */ struct tagARENA_FREE *next; /* Next free arena */ struct tagARENA_FREE *prev; /* Prev free arena */ } ARENA_FREE; #define ARENA_FLAG_FREE 0x00000001 /* flags OR'ed with arena size */ #define ARENA_FLAG_PREV_FREE 0x00000002 #define ARENA_SIZE_MASK 0xfffffffc #define ARENA_INUSE_MAGIC 0x4842 /* Value for arena 'magic' field */ #define ARENA_FREE_MAGIC 0x4846 /* Value for arena 'magic' field */ #define ARENA_INUSE_FILLER 0x55 #define ARENA_FREE_FILLER 0xaa #define QUIET 1 /* Suppress messages */ #define NOISY 0 /* Report all errors */ #define HEAP_NB_FREE_LISTS 4 /* Number of free lists */ /* Max size of the blocks on the free lists */ static const DWORD HEAP_freeListSizes[HEAP_NB_FREE_LISTS] = { 0x20, 0x80, 0x200, 0xffffffff }; typedef struct { DWORD size; ARENA_FREE arena; } FREE_LIST_ENTRY; struct tagHEAP; typedef struct tagSUBHEAP { DWORD size; /* Size of the whole sub-heap */ DWORD commitSize; /* Committed size of the sub-heap */ DWORD headerSize; /* Size of the heap header */ struct tagSUBHEAP *next; /* Next sub-heap */ struct tagHEAP *heap; /* Main heap structure */ DWORD magic; /* Magic number */ WORD selector; /* Selector for HEAP_WINE_SEGPTR heaps */ } SUBHEAP; #define SUBHEAP_MAGIC ((DWORD)('S' | ('U'<<8) | ('B'<<16) | ('H'<<24))) typedef struct tagHEAP { SUBHEAP subheap; /* First sub-heap */ struct tagHEAP *next; /* Next heap for this process */ FREE_LIST_ENTRY freeList[HEAP_NB_FREE_LISTS]; /* Free lists */ CRITICAL_SECTION critSection; /* Critical section for serialization */ DWORD flags; /* Heap flags */ DWORD magic; /* Magic number */ } HEAP; #define HEAP_MAGIC ((DWORD)('H' | ('E'<<8) | ('A'<<16) | ('P'<<24))) #define HEAP_DEF_SIZE 0x110000 /* Default heap size = 1Mb + 64Kb */ #define HEAP_MIN_BLOCK_SIZE (8+sizeof(ARENA_FREE)) /* Min. heap block size */ #define COMMIT_MASK 0xffff /* bitmask for commit/decommit granularity */ static HEAP *systemHeap; /* globally shared heap */ static HEAP *processHeap; /* main process heap */ static HEAP *segptrHeap; /* main segptr heap */ static HEAP *firstHeap; /* head of secondary heaps list */ /* address where we try to map the system heap */ #define SYSTEM_HEAP_BASE ((void*)0x65430000) static BOOL HEAP_IsRealArena( HEAP *heapPtr, DWORD flags, LPCVOID block, BOOL quiet ); #ifdef __GNUC__ #define GET_EIP() (__builtin_return_address(0)) #define SET_EIP(ptr) ((ARENA_INUSE*)(ptr) - 1)->callerEIP = GET_EIP() #else #define GET_EIP() 0 #define SET_EIP(ptr) /* nothing */ #endif /* __GNUC__ */ /*********************************************************************** * HEAP_Dump */ void HEAP_Dump( HEAP *heap ) { int i; SUBHEAP *subheap; char *ptr; DPRINTF( "Heap: %08lx\n", (DWORD)heap ); DPRINTF( "Next: %08lx Sub-heaps: %08lx", (DWORD)heap->next, (DWORD)&heap->subheap ); subheap = &heap->subheap; while (subheap->next) { DPRINTF( " -> %08lx", (DWORD)subheap->next ); subheap = subheap->next; } DPRINTF( "\nFree lists:\n Block Stat Size Id\n" ); for (i = 0; i < HEAP_NB_FREE_LISTS; i++) DPRINTF( "%08lx free %08lx %04x prev=%08lx next=%08lx\n", (DWORD)&heap->freeList[i].arena, heap->freeList[i].arena.size, heap->freeList[i].arena.threadId, (DWORD)heap->freeList[i].arena.prev, (DWORD)heap->freeList[i].arena.next ); subheap = &heap->subheap; while (subheap) { DWORD freeSize = 0, usedSize = 0, arenaSize = subheap->headerSize; DPRINTF( "\n\nSub-heap %08lx: size=%08lx committed=%08lx\n", (DWORD)subheap, subheap->size, subheap->commitSize ); DPRINTF( "\n Block Stat Size Id\n" ); ptr = (char*)subheap + subheap->headerSize; while (ptr < (char *)subheap + subheap->size) { if (*(DWORD *)ptr & ARENA_FLAG_FREE) { ARENA_FREE *pArena = (ARENA_FREE *)ptr; DPRINTF( "%08lx free %08lx %04x prev=%08lx next=%08lx\n", (DWORD)pArena, pArena->size & ARENA_SIZE_MASK, pArena->threadId, (DWORD)pArena->prev, (DWORD)pArena->next); ptr += sizeof(*pArena) + (pArena->size & ARENA_SIZE_MASK); arenaSize += sizeof(ARENA_FREE); freeSize += pArena->size & ARENA_SIZE_MASK; } else if (*(DWORD *)ptr & ARENA_FLAG_PREV_FREE) { ARENA_INUSE *pArena = (ARENA_INUSE *)ptr; DPRINTF( "%08lx Used %08lx %04x back=%08lx EIP=%p\n", (DWORD)pArena, pArena->size & ARENA_SIZE_MASK, pArena->threadId, *((DWORD *)pArena - 1), pArena->callerEIP ); ptr += sizeof(*pArena) + (pArena->size & ARENA_SIZE_MASK); arenaSize += sizeof(ARENA_INUSE); usedSize += pArena->size & ARENA_SIZE_MASK; } else { ARENA_INUSE *pArena = (ARENA_INUSE *)ptr; DPRINTF( "%08lx used %08lx %04x EIP=%p\n", (DWORD)pArena, pArena->size & ARENA_SIZE_MASK, pArena->threadId, pArena->callerEIP ); ptr += sizeof(*pArena) + (pArena->size & ARENA_SIZE_MASK); arenaSize += sizeof(ARENA_INUSE); usedSize += pArena->size & ARENA_SIZE_MASK; } } DPRINTF( "\nTotal: Size=%08lx Committed=%08lx Free=%08lx Used=%08lx Arenas=%08lx (%ld%%)\n\n", subheap->size, subheap->commitSize, freeSize, usedSize, arenaSize, (arenaSize * 100) / subheap->size ); subheap = subheap->next; } } /*********************************************************************** * HEAP_GetPtr * RETURNS * Pointer to the heap * NULL: Failure */ static HEAP *HEAP_GetPtr( HANDLE heap /* [in] Handle to the heap */ ) { HEAP *heapPtr = (HEAP *)heap; if (!heapPtr || (heapPtr->magic != HEAP_MAGIC)) { ERR("Invalid heap %08x!\n", heap ); SetLastError( ERROR_INVALID_HANDLE ); return NULL; } if (TRACE_ON(heap) && !HEAP_IsRealArena( heapPtr, 0, NULL, NOISY )) { HEAP_Dump( heapPtr ); assert( FALSE ); SetLastError( ERROR_INVALID_HANDLE ); return NULL; } return heapPtr; } /*********************************************************************** * HEAP_InsertFreeBlock * * Insert a free block into the free list. */ static void HEAP_InsertFreeBlock( HEAP *heap, ARENA_FREE *pArena ) { FREE_LIST_ENTRY *pEntry = heap->freeList; while (pEntry->size < pArena->size) pEntry++; pArena->size |= ARENA_FLAG_FREE; pArena->next = pEntry->arena.next; pArena->next->prev = pArena; pArena->prev = &pEntry->arena; pEntry->arena.next = pArena; } /*********************************************************************** * HEAP_FindSubHeap * Find the sub-heap containing a given address. * * RETURNS * Pointer: Success * NULL: Failure */ static SUBHEAP *HEAP_FindSubHeap( HEAP *heap, /* [in] Heap pointer */ LPCVOID ptr /* [in] Address */ ) { SUBHEAP *sub = &heap->subheap; while (sub) { if (((char *)ptr >= (char *)sub) && ((char *)ptr < (char *)sub + sub->size)) return sub; sub = sub->next; } return NULL; } /*********************************************************************** * HEAP_Commit * * Make sure the heap storage is committed up to (not including) ptr. */ static inline BOOL HEAP_Commit( SUBHEAP *subheap, void *ptr ) { DWORD size = (DWORD)((char *)ptr - (char *)subheap); size = (size + COMMIT_MASK) & ~COMMIT_MASK; if (size > subheap->size) size = subheap->size; if (size <= subheap->commitSize) return TRUE; if (!VirtualAlloc( (char *)subheap + subheap->commitSize, size - subheap->commitSize, MEM_COMMIT, PAGE_EXECUTE_READWRITE)) { WARN("Could not commit %08lx bytes at %08lx for heap %08lx\n", size - subheap->commitSize, (DWORD)((char *)subheap + subheap->commitSize), (DWORD)subheap->heap ); return FALSE; } subheap->commitSize = size; return TRUE; } /*********************************************************************** * HEAP_Decommit * * If possible, decommit the heap storage from (including) 'ptr'. */ static inline BOOL HEAP_Decommit( SUBHEAP *subheap, void *ptr ) { DWORD size = (DWORD)((char *)ptr - (char *)subheap); /* round to next block and add one full block */ size = ((size + COMMIT_MASK) & ~COMMIT_MASK) + COMMIT_MASK + 1; if (size >= subheap->commitSize) return TRUE; if (!VirtualFree( (char *)subheap + size, subheap->commitSize - size, MEM_DECOMMIT )) { WARN("Could not decommit %08lx bytes at %08lx for heap %08lx\n", subheap->commitSize - size, (DWORD)((char *)subheap + size), (DWORD)subheap->heap ); return FALSE; } subheap->commitSize = size; return TRUE; } /*********************************************************************** * HEAP_CreateFreeBlock * * Create a free block at a specified address. 'size' is the size of the * whole block, including the new arena. */ static void HEAP_CreateFreeBlock( SUBHEAP *subheap, void *ptr, DWORD size ) { ARENA_FREE *pFree; /* Create a free arena */ pFree = (ARENA_FREE *)ptr; pFree->threadId = GetCurrentTask(); pFree->magic = ARENA_FREE_MAGIC; /* If debugging, erase the freed block content */ if (TRACE_ON(heap)) { char *pEnd = (char *)ptr + size; if (pEnd > (char *)subheap + subheap->commitSize) pEnd = (char *)subheap + subheap->commitSize; if (pEnd > (char *)(pFree + 1)) memset( pFree + 1, ARENA_FREE_FILLER, pEnd - (char *)(pFree + 1) ); } /* Check if next block is free also */ if (((char *)ptr + size < (char *)subheap + subheap->size) && (*(DWORD *)((char *)ptr + size) & ARENA_FLAG_FREE)) { /* Remove the next arena from the free list */ ARENA_FREE *pNext = (ARENA_FREE *)((char *)ptr + size); pNext->next->prev = pNext->prev; pNext->prev->next = pNext->next; size += (pNext->size & ARENA_SIZE_MASK) + sizeof(*pNext); if (TRACE_ON(heap)) memset( pNext, ARENA_FREE_FILLER, sizeof(ARENA_FREE) ); } /* Set the next block PREV_FREE flag and pointer */ if ((char *)ptr + size < (char *)subheap + subheap->size) { DWORD *pNext = (DWORD *)((char *)ptr + size); *pNext |= ARENA_FLAG_PREV_FREE; *(ARENA_FREE **)(pNext - 1) = pFree; } /* Last, insert the new block into the free list */ pFree->size = size - sizeof(*pFree); HEAP_InsertFreeBlock( subheap->heap, pFree ); } /*********************************************************************** * HEAP_MakeInUseBlockFree * * Turn an in-use block into a free block. Can also decommit the end of * the heap, and possibly even free the sub-heap altogether. */ static void HEAP_MakeInUseBlockFree( SUBHEAP *subheap, ARENA_INUSE *pArena ) { ARENA_FREE *pFree; DWORD size = (pArena->size & ARENA_SIZE_MASK) + sizeof(*pArena); /* Check if we can merge with previous block */ if (pArena->size & ARENA_FLAG_PREV_FREE) { pFree = *((ARENA_FREE **)pArena - 1); size += (pFree->size & ARENA_SIZE_MASK) + sizeof(ARENA_FREE); /* Remove it from the free list */ pFree->next->prev = pFree->prev; pFree->prev->next = pFree->next; } else pFree = (ARENA_FREE *)pArena; /* Create a free block */ HEAP_CreateFreeBlock( subheap, pFree, size ); size = (pFree->size & ARENA_SIZE_MASK) + sizeof(ARENA_FREE); if ((char *)pFree + size < (char *)subheap + subheap->size) return; /* Not the last block, so nothing more to do */ /* Free the whole sub-heap if it's empty and not the original one */ if (((char *)pFree == (char *)subheap + subheap->headerSize) && (subheap != &subheap->heap->subheap)) { SUBHEAP *pPrev = &subheap->heap->subheap; /* Remove the free block from the list */ pFree->next->prev = pFree->prev; pFree->prev->next = pFree->next; /* Remove the subheap from the list */ while (pPrev && (pPrev->next != subheap)) pPrev = pPrev->next; if (pPrev) pPrev->next = subheap->next; /* Free the memory */ subheap->magic = 0; if (subheap->selector) FreeSelector16( subheap->selector ); VirtualFree( subheap, 0, MEM_RELEASE ); return; } /* Decommit the end of the heap */ if (!(subheap->heap->flags & HEAP_SHARED)) HEAP_Decommit( subheap, pFree + 1 ); } /*********************************************************************** * HEAP_ShrinkBlock * * Shrink an in-use block. */ static void HEAP_ShrinkBlock(SUBHEAP *subheap, ARENA_INUSE *pArena, DWORD size) { if ((pArena->size & ARENA_SIZE_MASK) >= size + HEAP_MIN_BLOCK_SIZE) { HEAP_CreateFreeBlock( subheap, (char *)(pArena + 1) + size, (pArena->size & ARENA_SIZE_MASK) - size ); /* assign size plus previous arena flags */ pArena->size = size | (pArena->size & ~ARENA_SIZE_MASK); } else { /* Turn off PREV_FREE flag in next block */ char *pNext = (char *)(pArena + 1) + (pArena->size & ARENA_SIZE_MASK); if (pNext < (char *)subheap + subheap->size) *(DWORD *)pNext &= ~ARENA_FLAG_PREV_FREE; } } /*********************************************************************** * HEAP_InitSubHeap */ static BOOL HEAP_InitSubHeap( HEAP *heap, LPVOID address, DWORD flags, DWORD commitSize, DWORD totalSize ) { SUBHEAP *subheap = (SUBHEAP *)address; WORD selector = 0; FREE_LIST_ENTRY *pEntry; int i; /* Commit memory */ if (flags & HEAP_SHARED) commitSize = totalSize; /* always commit everything in a shared heap */ if (!VirtualAlloc(address, commitSize, MEM_COMMIT, PAGE_EXECUTE_READWRITE)) { WARN("Could not commit %08lx bytes for sub-heap %08lx\n", commitSize, (DWORD)address ); return FALSE; } /* Allocate a selector if needed */ if (flags & HEAP_WINE_SEGPTR) { unsigned char selflags = WINE_LDT_FLAGS_DATA; if (flags & (HEAP_WINE_CODESEG | HEAP_WINE_CODE16SEG)) selflags = WINE_LDT_FLAGS_CODE; if (flags & HEAP_WINE_CODESEG) selflags |= WINE_LDT_FLAGS_32BIT; selector = SELECTOR_AllocBlock( address, totalSize, selflags ); if (!selector) { ERR("Could not allocate selector\n" ); return FALSE; } } /* Fill the sub-heap structure */ subheap->heap = heap; subheap->selector = selector; subheap->size = totalSize; subheap->commitSize = commitSize; subheap->magic = SUBHEAP_MAGIC; if ( subheap != (SUBHEAP *)heap ) { /* If this is a secondary subheap, insert it into list */ subheap->headerSize = sizeof(SUBHEAP); subheap->next = heap->subheap.next; heap->subheap.next = subheap; } else { /* If this is a primary subheap, initialize main heap */ subheap->headerSize = sizeof(HEAP); subheap->next = NULL; heap->next = NULL; heap->flags = flags; heap->magic = HEAP_MAGIC; /* Build the free lists */ for (i = 0, pEntry = heap->freeList; i < HEAP_NB_FREE_LISTS; i++, pEntry++) { pEntry->size = HEAP_freeListSizes[i]; pEntry->arena.size = 0 | ARENA_FLAG_FREE; pEntry->arena.next = i < HEAP_NB_FREE_LISTS-1 ? &heap->freeList[i+1].arena : &heap->freeList[0].arena; pEntry->arena.prev = i ? &heap->freeList[i-1].arena : &heap->freeList[HEAP_NB_FREE_LISTS-1].arena; pEntry->arena.threadId = 0; pEntry->arena.magic = ARENA_FREE_MAGIC; } /* Initialize critical section */ InitializeCriticalSection( &heap->critSection ); } /* Create the first free block */ HEAP_CreateFreeBlock( subheap, (LPBYTE)subheap + subheap->headerSize, subheap->size - subheap->headerSize ); return TRUE; } /*********************************************************************** * HEAP_CreateSubHeap * * Create a sub-heap of the given size. * If heap == NULL, creates a main heap. */ static SUBHEAP *HEAP_CreateSubHeap( HEAP *heap, DWORD flags, DWORD commitSize, DWORD totalSize ) { LPVOID address; /* Round-up sizes on a 64K boundary */ if (flags & HEAP_WINE_SEGPTR) { totalSize = commitSize = 0x10000; /* Only 64K at a time for SEGPTRs */ } else { totalSize = (totalSize + 0xffff) & 0xffff0000; commitSize = (commitSize + 0xffff) & 0xffff0000; if (!commitSize) commitSize = 0x10000; if (totalSize < commitSize) totalSize = commitSize; } /* Allocate the memory block */ if (!(address = VirtualAlloc( NULL, totalSize, MEM_RESERVE, PAGE_EXECUTE_READWRITE ))) { WARN("Could not VirtualAlloc %08lx bytes\n", totalSize ); return NULL; } /* Initialize subheap */ if (!HEAP_InitSubHeap( heap? heap : (HEAP *)address, address, flags, commitSize, totalSize )) { VirtualFree( address, 0, MEM_RELEASE ); return NULL; } return (SUBHEAP *)address; } /*********************************************************************** * HEAP_FindFreeBlock * * Find a free block at least as large as the requested size, and make sure * the requested size is committed. */ static ARENA_FREE *HEAP_FindFreeBlock( HEAP *heap, DWORD size, SUBHEAP **ppSubHeap ) { SUBHEAP *subheap; ARENA_FREE *pArena; FREE_LIST_ENTRY *pEntry = heap->freeList; /* Find a suitable free list, and in it find a block large enough */ while (pEntry->size < size) pEntry++; pArena = pEntry->arena.next; while (pArena != &heap->freeList[0].arena) { if (pArena->size > size) { subheap = HEAP_FindSubHeap( heap, pArena ); if (!HEAP_Commit( subheap, (char *)pArena + sizeof(ARENA_INUSE) + size + HEAP_MIN_BLOCK_SIZE)) return NULL; *ppSubHeap = subheap; return pArena; } pArena = pArena->next; } /* If no block was found, attempt to grow the heap */ if (!(heap->flags & HEAP_GROWABLE)) { WARN("Not enough space in heap %08lx for %08lx bytes\n", (DWORD)heap, size ); return NULL; } /* make sure that we have a big enough size *committed* to fit another * last free arena in ! * So just one heap struct, one first free arena which will eventually * get inuse, and HEAP_MIN_BLOCK_SIZE for the second free arena that * might get assigned all remaining free space in HEAP_ShrinkBlock() */ size += sizeof(SUBHEAP) + sizeof(ARENA_INUSE) + HEAP_MIN_BLOCK_SIZE; if (!(subheap = HEAP_CreateSubHeap( heap, heap->flags, size, max( HEAP_DEF_SIZE, size ) ))) return NULL; TRACE("created new sub-heap %08lx of %08lx bytes for heap %08lx\n", (DWORD)subheap, size, (DWORD)heap ); *ppSubHeap = subheap; return (ARENA_FREE *)(subheap + 1); } /*********************************************************************** * HEAP_IsValidArenaPtr * * Check that the pointer is inside the range possible for arenas. */ static BOOL HEAP_IsValidArenaPtr( HEAP *heap, void *ptr ) { int i; SUBHEAP *subheap = HEAP_FindSubHeap( heap, ptr ); if (!subheap) return FALSE; if ((char *)ptr >= (char *)subheap + subheap->headerSize) return TRUE; if (subheap != &heap->subheap) return FALSE; for (i = 0; i < HEAP_NB_FREE_LISTS; i++) if (ptr == (void *)&heap->freeList[i].arena) return TRUE; return FALSE; } /*********************************************************************** * HEAP_ValidateFreeArena */ static BOOL HEAP_ValidateFreeArena( SUBHEAP *subheap, ARENA_FREE *pArena ) { char *heapEnd = (char *)subheap + subheap->size; #if !defined(ALLOW_UNALIGNED_ACCESS) /* Check for unaligned pointers */ if ( (long)pArena % sizeof(void *) != 0 ) { ERR( "Heap %08lx: unaligned arena pointer %08lx\n", (DWORD)subheap->heap, (DWORD)pArena ); return FALSE; } #endif /* Check magic number */ if (pArena->magic != ARENA_FREE_MAGIC) { ERR("Heap %08lx: invalid free arena magic for %08lx\n", (DWORD)subheap->heap, (DWORD)pArena ); return FALSE; } /* Check size flags */ if (!(pArena->size & ARENA_FLAG_FREE) || (pArena->size & ARENA_FLAG_PREV_FREE)) { ERR("Heap %08lx: bad flags %lx for free arena %08lx\n", (DWORD)subheap->heap, pArena->size & ~ARENA_SIZE_MASK, (DWORD)pArena ); } /* Check arena size */ if ((char *)(pArena + 1) + (pArena->size & ARENA_SIZE_MASK) > heapEnd) { ERR("Heap %08lx: bad size %08lx for free arena %08lx\n", (DWORD)subheap->heap, (DWORD)pArena->size & ARENA_SIZE_MASK, (DWORD)pArena ); return FALSE; } /* Check that next pointer is valid */ if (!HEAP_IsValidArenaPtr( subheap->heap, pArena->next )) { ERR("Heap %08lx: bad next ptr %08lx for arena %08lx\n", (DWORD)subheap->heap, (DWORD)pArena->next, (DWORD)pArena ); return FALSE; } /* Check that next arena is free */ if (!(pArena->next->size & ARENA_FLAG_FREE) || (pArena->next->magic != ARENA_FREE_MAGIC)) { ERR("Heap %08lx: next arena %08lx invalid for %08lx\n", (DWORD)subheap->heap, (DWORD)pArena->next, (DWORD)pArena ); return FALSE; } /* Check that prev pointer is valid */ if (!HEAP_IsValidArenaPtr( subheap->heap, pArena->prev )) { ERR("Heap %08lx: bad prev ptr %08lx for arena %08lx\n", (DWORD)subheap->heap, (DWORD)pArena->prev, (DWORD)pArena ); return FALSE; } /* Check that prev arena is free */ if (!(pArena->prev->size & ARENA_FLAG_FREE) || (pArena->prev->magic != ARENA_FREE_MAGIC)) { /* this often means that the prev arena got overwritten * by a memory write before that prev arena */ ERR("Heap %08lx: prev arena %08lx invalid for %08lx\n", (DWORD)subheap->heap, (DWORD)pArena->prev, (DWORD)pArena ); return FALSE; } /* Check that next block has PREV_FREE flag */ if ((char *)(pArena + 1) + (pArena->size & ARENA_SIZE_MASK) < heapEnd) { if (!(*(DWORD *)((char *)(pArena + 1) + (pArena->size & ARENA_SIZE_MASK)) & ARENA_FLAG_PREV_FREE)) { ERR("Heap %08lx: free arena %08lx next block has no PREV_FREE flag\n", (DWORD)subheap->heap, (DWORD)pArena ); return FALSE; } /* Check next block back pointer */ if (*((ARENA_FREE **)((char *)(pArena + 1) + (pArena->size & ARENA_SIZE_MASK)) - 1) != pArena) { ERR("Heap %08lx: arena %08lx has wrong back ptr %08lx\n", (DWORD)subheap->heap, (DWORD)pArena, *((DWORD *)((char *)(pArena+1)+ (pArena->size & ARENA_SIZE_MASK)) - 1)); return FALSE; } } return TRUE; } /*********************************************************************** * HEAP_ValidateInUseArena */ static BOOL HEAP_ValidateInUseArena( SUBHEAP *subheap, ARENA_INUSE *pArena, BOOL quiet ) { char *heapEnd = (char *)subheap + subheap->size; #if !defined(ALLOW_UNALIGNED_ACCESS) /* Check for unaligned pointers */ if ( (long)pArena % sizeof(void *) != 0 ) { if ( quiet == NOISY ) { ERR( "Heap %08lx: unaligned arena pointer %08lx\n", (DWORD)subheap->heap, (DWORD)pArena ); if ( TRACE_ON(heap) ) HEAP_Dump( subheap->heap ); } else if ( WARN_ON(heap) ) { WARN( "Heap %08lx: unaligned arena pointer %08lx\n", (DWORD)subheap->heap, (DWORD)pArena ); if ( TRACE_ON(heap) ) HEAP_Dump( subheap->heap ); } return FALSE; } #endif /* Check magic number */ if (pArena->magic != ARENA_INUSE_MAGIC) { if (quiet == NOISY) { ERR("Heap %08lx: invalid in-use arena magic for %08lx\n", (DWORD)subheap->heap, (DWORD)pArena ); if (TRACE_ON(heap)) HEAP_Dump( subheap->heap ); } else if (WARN_ON(heap)) { WARN("Heap %08lx: invalid in-use arena magic for %08lx\n", (DWORD)subheap->heap, (DWORD)pArena ); if (TRACE_ON(heap)) HEAP_Dump( subheap->heap ); } return FALSE; } /* Check size flags */ if (pArena->size & ARENA_FLAG_FREE) { ERR("Heap %08lx: bad flags %lx for in-use arena %08lx\n", (DWORD)subheap->heap, pArena->size & ~ARENA_SIZE_MASK, (DWORD)pArena ); } /* Check arena size */ if ((char *)(pArena + 1) + (pArena->size & ARENA_SIZE_MASK) > heapEnd) { ERR("Heap %08lx: bad size %08lx for in-use arena %08lx\n", (DWORD)subheap->heap, (DWORD)pArena->size & ARENA_SIZE_MASK, (DWORD)pArena ); return FALSE; } /* Check next arena PREV_FREE flag */ if (((char *)(pArena + 1) + (pArena->size & ARENA_SIZE_MASK) < heapEnd) && (*(DWORD *)((char *)(pArena + 1) + (pArena->size & ARENA_SIZE_MASK)) & ARENA_FLAG_PREV_FREE)) { ERR("Heap %08lx: in-use arena %08lx next block has PREV_FREE flag\n", (DWORD)subheap->heap, (DWORD)pArena ); return FALSE; } /* Check prev free arena */ if (pArena->size & ARENA_FLAG_PREV_FREE) { ARENA_FREE *pPrev = *((ARENA_FREE **)pArena - 1); /* Check prev pointer */ if (!HEAP_IsValidArenaPtr( subheap->heap, pPrev )) { ERR("Heap %08lx: bad back ptr %08lx for arena %08lx\n", (DWORD)subheap->heap, (DWORD)pPrev, (DWORD)pArena ); return FALSE; } /* Check that prev arena is free */ if (!(pPrev->size & ARENA_FLAG_FREE) || (pPrev->magic != ARENA_FREE_MAGIC)) { ERR("Heap %08lx: prev arena %08lx invalid for in-use %08lx\n", (DWORD)subheap->heap, (DWORD)pPrev, (DWORD)pArena ); return FALSE; } /* Check that prev arena is really the previous block */ if ((char *)(pPrev + 1) + (pPrev->size & ARENA_SIZE_MASK) != (char *)pArena) { ERR("Heap %08lx: prev arena %08lx is not prev for in-use %08lx\n", (DWORD)subheap->heap, (DWORD)pPrev, (DWORD)pArena ); return FALSE; } } return TRUE; } /*********************************************************************** * HEAP_GetSegptr * * Transform a linear pointer into a SEGPTR. The pointer must have been * allocated from a HEAP_WINE_SEGPTR heap. */ SEGPTR HEAP_GetSegptr( HANDLE heap, DWORD flags, LPCVOID ptr ) { HEAP *heapPtr = HEAP_GetPtr( heap ); SUBHEAP *subheap; SEGPTR ret = 0; /* Validate the parameters */ if (!heapPtr) return 0; flags |= heapPtr->flags; if (!(flags & HEAP_WINE_SEGPTR)) { ERR("Heap %08x is not a SEGPTR heap\n", heap ); return 0; } if (!(flags & HEAP_NO_SERIALIZE)) EnterCriticalSection( &heapPtr->critSection ); /* Get the subheap */ if ((subheap = HEAP_FindSubHeap( heapPtr, ptr ))) ret = MAKESEGPTR(subheap->selector, (char *)ptr - (char *)subheap); if (!(flags & HEAP_NO_SERIALIZE)) LeaveCriticalSection( &heapPtr->critSection ); return ret; } /*********************************************************************** * MapLS (KERNEL32.@) * MapLS (KERNEL.358) * * Maps linear pointer to segmented. */ SEGPTR WINAPI MapLS( LPCVOID ptr ) { SUBHEAP *subheap; SEGPTR ret = 0; if (!HIWORD(ptr)) return (SEGPTR)ptr; /* check if the pointer is inside the segptr heap */ EnterCriticalSection( &segptrHeap->critSection ); if ((subheap = HEAP_FindSubHeap( segptrHeap, ptr ))) ret = MAKESEGPTR( subheap->selector, (char *)ptr - (char *)subheap ); LeaveCriticalSection( &segptrHeap->critSection ); /* otherwise, allocate a brand-new selector */ if (!ret) { WORD sel = SELECTOR_AllocBlock( ptr, 0x10000, WINE_LDT_FLAGS_DATA ); ret = MAKESEGPTR( sel, 0 ); } return ret; } /*********************************************************************** * UnMapLS (KERNEL32.@) * UnMapLS (KERNEL.359) * * Free mapped selector. */ void WINAPI UnMapLS( SEGPTR sptr ) { SUBHEAP *subheap; if (!SELECTOROF(sptr)) return; /* check if ptr is inside segptr heap */ EnterCriticalSection( &segptrHeap->critSection ); subheap = HEAP_FindSubHeap( segptrHeap, MapSL(sptr) ); if ((subheap) && (subheap->selector != SELECTOROF(sptr))) subheap = NULL; LeaveCriticalSection( &segptrHeap->critSection ); /* if not inside heap, free the selector */ if (!subheap) FreeSelector16( SELECTOROF(sptr) ); } /*********************************************************************** * HEAP_IsRealArena [Internal] * Validates a block is a valid arena. * * RETURNS * TRUE: Success * FALSE: Failure */ static BOOL HEAP_IsRealArena( HEAP *heapPtr, /* [in] ptr to the heap */ DWORD flags, /* [in] Bit flags that control access during operation */ LPCVOID block, /* [in] Optional pointer to memory block to validate */ BOOL quiet ) /* [in] Flag - if true, HEAP_ValidateInUseArena * does not complain */ { SUBHEAP *subheap; BOOL ret = TRUE; if (!heapPtr || (heapPtr->magic != HEAP_MAGIC)) { ERR("Invalid heap %p!\n", heapPtr ); return FALSE; } flags &= HEAP_NO_SERIALIZE; flags |= heapPtr->flags; /* calling HeapLock may result in infinite recursion, so do the critsect directly */ if (!(flags & HEAP_NO_SERIALIZE)) EnterCriticalSection( &heapPtr->critSection ); if (block) { /* Only check this single memory block */ if (!(subheap = HEAP_FindSubHeap( heapPtr, block )) || ((char *)block < (char *)subheap + subheap->headerSize + sizeof(ARENA_INUSE))) { if (quiet == NOISY) ERR("Heap %p: block %p is not inside heap\n", heapPtr, block ); else if (WARN_ON(heap)) WARN("Heap %p: block %p is not inside heap\n", heapPtr, block ); ret = FALSE; } else ret = HEAP_ValidateInUseArena( subheap, (ARENA_INUSE *)block - 1, quiet ); if (!(flags & HEAP_NO_SERIALIZE)) LeaveCriticalSection( &heapPtr->critSection ); return ret; } subheap = &heapPtr->subheap; while (subheap && ret) { char *ptr = (char *)subheap + subheap->headerSize; while (ptr < (char *)subheap + subheap->size) { if (*(DWORD *)ptr & ARENA_FLAG_FREE) { if (!HEAP_ValidateFreeArena( subheap, (ARENA_FREE *)ptr )) { ret = FALSE; break; } ptr += sizeof(ARENA_FREE) + (*(DWORD *)ptr & ARENA_SIZE_MASK); } else { if (!HEAP_ValidateInUseArena( subheap, (ARENA_INUSE *)ptr, NOISY )) { ret = FALSE; break; } ptr += sizeof(ARENA_INUSE) + (*(DWORD *)ptr & ARENA_SIZE_MASK); } } subheap = subheap->next; } if (!(flags & HEAP_NO_SERIALIZE)) LeaveCriticalSection( &heapPtr->critSection ); return ret; } /*********************************************************************** * HEAP_CreateSystemHeap * * Create the system heap. */ static HANDLE HEAP_CreateSystemHeap(void) { int created; HANDLE map = CreateFileMappingA( INVALID_HANDLE_VALUE, NULL, SEC_COMMIT | PAGE_READWRITE, 0, HEAP_DEF_SIZE, "__SystemHeap" ); if (!map) return 0; created = (GetLastError() != ERROR_ALREADY_EXISTS); if (!(systemHeap = MapViewOfFileEx( map, FILE_MAP_ALL_ACCESS, 0, 0, 0, SYSTEM_HEAP_BASE ))) { /* pre-defined address not available, use any one */ ERR( "system heap base address %p not available\n", SYSTEM_HEAP_BASE ); return 0; } if (created) /* newly created heap */ { HEAP_InitSubHeap( systemHeap, systemHeap, HEAP_SHARED, 0, HEAP_DEF_SIZE ); MakeCriticalSectionGlobal( &systemHeap->critSection ); } else { /* wait for the heap to be initialized */ while (!systemHeap->critSection.LockSemaphore) Sleep(1); } CloseHandle( map ); return (HANDLE)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 */ ) { SUBHEAP *subheap; if ( flags & HEAP_SHARED ) { if (!systemHeap) HEAP_CreateSystemHeap(); else WARN( "Shared Heap requested, returning system heap.\n" ); return (HANDLE)systemHeap; } /* Allocate the heap block */ if (!maxSize) { maxSize = HEAP_DEF_SIZE; flags |= HEAP_GROWABLE; } if (!(subheap = HEAP_CreateSubHeap( NULL, flags, initialSize, maxSize ))) { SetLastError( ERROR_OUTOFMEMORY ); return 0; } /* link it into the per-process heap list */ if (processHeap) { HEAP *heapPtr = subheap->heap; EnterCriticalSection( &processHeap->critSection ); heapPtr->next = firstHeap; firstHeap = heapPtr; LeaveCriticalSection( &processHeap->critSection ); } else /* assume the first heap we create is the process main heap */ { SUBHEAP *segptr; processHeap = subheap->heap; /* create the SEGPTR heap */ if (!(segptr = HEAP_CreateSubHeap( NULL, flags|HEAP_WINE_SEGPTR|HEAP_GROWABLE, 0, 0 ))) { SetLastError( ERROR_OUTOFMEMORY ); return 0; } segptrHeap = segptr->heap; } return (HANDLE)subheap; } /*********************************************************************** * HeapDestroy (KERNEL32.@) * RETURNS * TRUE: Success * FALSE: Failure */ BOOL WINAPI HeapDestroy( HANDLE heap /* [in] Handle of heap */ ) { HEAP *heapPtr = HEAP_GetPtr( heap ); SUBHEAP *subheap; TRACE("%08x\n", heap ); if (!heapPtr) return FALSE; if (heapPtr == systemHeap) { WARN( "attempt to destroy system heap, returning TRUE!\n" ); return TRUE; } if (heapPtr == processHeap) /* cannot delete the main process heap */ { SetLastError( ERROR_INVALID_PARAMETER ); return FALSE; } else /* remove it from the per-process list */ { HEAP **pptr; EnterCriticalSection( &processHeap->critSection ); pptr = &firstHeap; while (*pptr && *pptr != heapPtr) pptr = &(*pptr)->next; if (*pptr) *pptr = (*pptr)->next; LeaveCriticalSection( &processHeap->critSection ); } DeleteCriticalSection( &heapPtr->critSection ); subheap = &heapPtr->subheap; while (subheap) { SUBHEAP *next = subheap->next; if (subheap->selector) FreeSelector16( subheap->selector ); VirtualFree( subheap, 0, MEM_RELEASE ); subheap = next; } return TRUE; } /*********************************************************************** * HeapAlloc (KERNEL32.@) * RETURNS * Pointer to allocated memory block * NULL: Failure */ LPVOID WINAPI HeapAlloc( HANDLE heap, /* [in] Handle of private heap block */ DWORD flags, /* [in] Heap allocation control flags */ DWORD size /* [in] Number of bytes to allocate */ ) { ARENA_FREE *pArena; ARENA_INUSE *pInUse; SUBHEAP *subheap; HEAP *heapPtr = HEAP_GetPtr( heap ); /* Validate the parameters */ if ((flags & HEAP_WINE_SEGPTR) && size < 0x10000) heapPtr = segptrHeap; if (!heapPtr) return NULL; flags &= HEAP_GENERATE_EXCEPTIONS | HEAP_NO_SERIALIZE | HEAP_ZERO_MEMORY; flags |= heapPtr->flags; size = (size + 3) & ~3; if (size < HEAP_MIN_BLOCK_SIZE) size = HEAP_MIN_BLOCK_SIZE; if (!(flags & HEAP_NO_SERIALIZE)) EnterCriticalSection( &heapPtr->critSection ); /* Locate a suitable free block */ if (!(pArena = HEAP_FindFreeBlock( heapPtr, size, &subheap ))) { TRACE("(%08x,%08lx,%08lx): returning NULL\n", heap, flags, size ); if (!(flags & HEAP_NO_SERIALIZE)) LeaveCriticalSection( &heapPtr->critSection ); SetLastError( ERROR_COMMITMENT_LIMIT ); return NULL; } /* Remove the arena from the free list */ pArena->next->prev = pArena->prev; pArena->prev->next = pArena->next; /* Build the in-use arena */ pInUse = (ARENA_INUSE *)pArena; /* in-use arena is smaller than free arena, * so we have to add the difference to the size */ pInUse->size = (pInUse->size & ~ARENA_FLAG_FREE) + sizeof(ARENA_FREE) - sizeof(ARENA_INUSE); pInUse->callerEIP = GET_EIP(); pInUse->threadId = GetCurrentTask(); pInUse->magic = ARENA_INUSE_MAGIC; /* Shrink the block */ HEAP_ShrinkBlock( subheap, pInUse, size ); if (flags & HEAP_ZERO_MEMORY) memset( pInUse + 1, 0, pInUse->size & ARENA_SIZE_MASK ); else if (TRACE_ON(heap)) memset( pInUse + 1, ARENA_INUSE_FILLER, pInUse->size & ARENA_SIZE_MASK ); if (!(flags & HEAP_NO_SERIALIZE)) LeaveCriticalSection( &heapPtr->critSection ); TRACE("(%08x,%08lx,%08lx): returning %08lx\n", heap, flags, size, (DWORD)(pInUse + 1) ); return (LPVOID)(pInUse + 1); } /*********************************************************************** * HeapFree (KERNEL32.@) * RETURNS * TRUE: Success * FALSE: Failure */ BOOL WINAPI HeapFree( HANDLE heap, /* [in] Handle of heap */ DWORD flags, /* [in] Heap freeing flags */ LPVOID ptr /* [in] Address of memory to free */ ) { ARENA_INUSE *pInUse; SUBHEAP *subheap; HEAP *heapPtr = HEAP_GetPtr( heap ); /* Validate the parameters */ if (!ptr) return TRUE; /* freeing a NULL ptr isn't an error in Win2k */ if (flags & HEAP_WINE_SEGPTR) heapPtr = segptrHeap; if (!heapPtr) return FALSE; flags &= HEAP_NO_SERIALIZE; flags |= heapPtr->flags; if (!(flags & HEAP_NO_SERIALIZE)) EnterCriticalSection( &heapPtr->critSection ); if (!HEAP_IsRealArena( heapPtr, HEAP_NO_SERIALIZE, ptr, QUIET )) { if (!(flags & HEAP_NO_SERIALIZE)) LeaveCriticalSection( &heapPtr->critSection ); SetLastError( ERROR_INVALID_PARAMETER ); TRACE("(%08x,%08lx,%08lx): returning FALSE\n", heap, flags, (DWORD)ptr ); return FALSE; } /* Turn the block into a free block */ pInUse = (ARENA_INUSE *)ptr - 1; subheap = HEAP_FindSubHeap( heapPtr, pInUse ); HEAP_MakeInUseBlockFree( subheap, pInUse ); if (!(flags & HEAP_NO_SERIALIZE)) LeaveCriticalSection( &heapPtr->critSection ); TRACE("(%08x,%08lx,%08lx): returning TRUE\n", heap, flags, (DWORD)ptr ); return TRUE; } /*********************************************************************** * HeapReAlloc (KERNEL32.@) * RETURNS * Pointer to reallocated memory block * NULL: Failure */ LPVOID WINAPI HeapReAlloc( HANDLE heap, /* [in] Handle of heap block */ DWORD flags, /* [in] Heap reallocation flags */ LPVOID ptr, /* [in] Address of memory to reallocate */ DWORD size /* [in] Number of bytes to reallocate */ ) { ARENA_INUSE *pArena; DWORD oldSize; HEAP *heapPtr; SUBHEAP *subheap; if (!ptr) return HeapAlloc( heap, flags, size ); /* FIXME: correct? */ if ((flags & HEAP_WINE_SEGPTR) && size < 0x10000) heapPtr = segptrHeap; if (!(heapPtr = HEAP_GetPtr( heap ))) return FALSE; /* Validate the parameters */ flags &= HEAP_GENERATE_EXCEPTIONS | HEAP_NO_SERIALIZE | HEAP_ZERO_MEMORY | HEAP_REALLOC_IN_PLACE_ONLY; flags |= heapPtr->flags; size = (size + 3) & ~3; if (size < HEAP_MIN_BLOCK_SIZE) size = HEAP_MIN_BLOCK_SIZE; if (!(flags & HEAP_NO_SERIALIZE)) EnterCriticalSection( &heapPtr->critSection ); if (!HEAP_IsRealArena( heapPtr, HEAP_NO_SERIALIZE, ptr, QUIET )) { if (!(flags & HEAP_NO_SERIALIZE)) LeaveCriticalSection( &heapPtr->critSection ); SetLastError( ERROR_INVALID_PARAMETER ); TRACE("(%08x,%08lx,%08lx,%08lx): returning NULL\n", heap, flags, (DWORD)ptr, size ); return NULL; } /* Check if we need to grow the block */ pArena = (ARENA_INUSE *)ptr - 1; pArena->threadId = GetCurrentTask(); subheap = HEAP_FindSubHeap( heapPtr, pArena ); oldSize = (pArena->size & ARENA_SIZE_MASK); if (size > oldSize) { char *pNext = (char *)(pArena + 1) + oldSize; if ((pNext < (char *)subheap + subheap->size) && (*(DWORD *)pNext & ARENA_FLAG_FREE) && (oldSize + (*(DWORD *)pNext & ARENA_SIZE_MASK) + sizeof(ARENA_FREE) >= size)) { /* The next block is free and large enough */ ARENA_FREE *pFree = (ARENA_FREE *)pNext; pFree->next->prev = pFree->prev; pFree->prev->next = pFree->next; pArena->size += (pFree->size & ARENA_SIZE_MASK) + sizeof(*pFree); if (!HEAP_Commit( subheap, (char *)pArena + sizeof(ARENA_INUSE) + size + HEAP_MIN_BLOCK_SIZE)) { if (!(flags & HEAP_NO_SERIALIZE)) LeaveCriticalSection( &heapPtr->critSection ); SetLastError( ERROR_OUTOFMEMORY ); return NULL; } HEAP_ShrinkBlock( subheap, pArena, size ); } else /* Do it the hard way */ { ARENA_FREE *pNew; ARENA_INUSE *pInUse; SUBHEAP *newsubheap; if ((flags & HEAP_REALLOC_IN_PLACE_ONLY) || !(pNew = HEAP_FindFreeBlock( heapPtr, size, &newsubheap ))) { if (!(flags & HEAP_NO_SERIALIZE)) LeaveCriticalSection( &heapPtr->critSection ); SetLastError( ERROR_OUTOFMEMORY ); return NULL; } /* Build the in-use arena */ pNew->next->prev = pNew->prev; pNew->prev->next = pNew->next; pInUse = (ARENA_INUSE *)pNew; pInUse->size = (pInUse->size & ~ARENA_FLAG_FREE) + sizeof(ARENA_FREE) - sizeof(ARENA_INUSE); pInUse->threadId = GetCurrentTask(); pInUse->magic = ARENA_INUSE_MAGIC; HEAP_ShrinkBlock( newsubheap, pInUse, size ); memcpy( pInUse + 1, pArena + 1, oldSize ); /* Free the previous block */ HEAP_MakeInUseBlockFree( subheap, pArena ); subheap = newsubheap; pArena = pInUse; } } else HEAP_ShrinkBlock( subheap, pArena, size ); /* Shrink the block */ /* Clear the extra bytes if needed */ if (size > oldSize) { if (flags & HEAP_ZERO_MEMORY) memset( (char *)(pArena + 1) + oldSize, 0, (pArena->size & ARENA_SIZE_MASK) - oldSize ); else if (TRACE_ON(heap)) memset( (char *)(pArena + 1) + oldSize, ARENA_INUSE_FILLER, (pArena->size & ARENA_SIZE_MASK) - oldSize ); } /* Return the new arena */ pArena->callerEIP = GET_EIP(); if (!(flags & HEAP_NO_SERIALIZE)) LeaveCriticalSection( &heapPtr->critSection ); TRACE("(%08x,%08lx,%08lx,%08lx): returning %08lx\n", heap, flags, (DWORD)ptr, size, (DWORD)(pArena + 1) ); return (LPVOID)(pArena + 1); } /*********************************************************************** * HeapCompact (KERNEL32.@) */ DWORD WINAPI HeapCompact( HANDLE heap, DWORD flags ) { SetLastError(ERROR_CALL_NOT_IMPLEMENTED); return 0; } /*********************************************************************** * 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 */ ) { HEAP *heapPtr = HEAP_GetPtr( heap ); if (!heapPtr) return FALSE; EnterCriticalSection( &heapPtr->critSection ); return TRUE; } /*********************************************************************** * 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 */ ) { HEAP *heapPtr = HEAP_GetPtr( heap ); if (!heapPtr) return FALSE; LeaveCriticalSection( &heapPtr->critSection ); return TRUE; } /*********************************************************************** * HeapSize (KERNEL32.@) * RETURNS * Size in bytes of allocated memory * 0xffffffff: Failure */ DWORD WINAPI HeapSize( HANDLE heap, /* [in] Handle of heap */ DWORD flags, /* [in] Heap size control flags */ LPVOID ptr /* [in] Address of memory to return size for */ ) { DWORD ret; HEAP *heapPtr = HEAP_GetPtr( heap ); if (flags & HEAP_WINE_SEGPTR) heapPtr = segptrHeap; if (!heapPtr) return FALSE; flags &= HEAP_NO_SERIALIZE; flags |= heapPtr->flags; if (!(flags & HEAP_NO_SERIALIZE)) EnterCriticalSection( &heapPtr->critSection ); if (!HEAP_IsRealArena( heapPtr, HEAP_NO_SERIALIZE, ptr, QUIET )) { SetLastError( ERROR_INVALID_PARAMETER ); ret = 0xffffffff; } else { ARENA_INUSE *pArena = (ARENA_INUSE *)ptr - 1; ret = pArena->size & ARENA_SIZE_MASK; } if (!(flags & HEAP_NO_SERIALIZE)) LeaveCriticalSection( &heapPtr->critSection ); TRACE("(%08x,%08lx,%08lx): returning %08lx\n", heap, flags, (DWORD)ptr, ret ); return ret; } /*********************************************************************** * 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 */ ) { HEAP *heapPtr = HEAP_GetPtr( heap ); if (flags & HEAP_WINE_SEGPTR) heapPtr = segptrHeap; if (!heapPtr) return FALSE; return HEAP_IsRealArena( heapPtr, flags, block, QUIET ); } /*********************************************************************** * HeapWalk (KERNEL32.@) * Enumerates the memory blocks in a specified heap. * See HEAP_Dump() for info on heap structure. * * 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 */ ) { HEAP *heapPtr = HEAP_GetPtr(heap); SUBHEAP *sub, *currentheap = NULL; BOOL ret = FALSE; char *ptr; int region_index = 0; if (!heapPtr || !entry) { SetLastError(ERROR_INVALID_PARAMETER); return FALSE; } if (!(heapPtr->flags & HEAP_NO_SERIALIZE)) EnterCriticalSection( &heapPtr->critSection ); /* set ptr to the next arena to be examined */ if (!entry->lpData) /* first call (init) ? */ { TRACE("begin walking of heap 0x%08x.\n", heap); /*HEAP_Dump(heapPtr);*/ currentheap = &heapPtr->subheap; ptr = (char*)currentheap + currentheap->headerSize; } else { ptr = entry->lpData; sub = &heapPtr->subheap; while (sub) { if (((char *)ptr >= (char *)sub) && ((char *)ptr < (char *)sub + sub->size)) { currentheap = sub; break; } sub = sub->next; region_index++; } if (currentheap == NULL) { ERR("no matching subheap found, shouldn't happen !\n"); SetLastError(ERROR_NO_MORE_ITEMS); goto HW_end; } ptr += entry->cbData; /* point to next arena */ if (ptr > (char *)currentheap + currentheap->size - 1) { /* proceed with next subheap */ if (!(currentheap = currentheap->next)) { /* successfully finished */ TRACE("end reached.\n"); SetLastError(ERROR_NO_MORE_ITEMS); goto HW_end; } ptr = (char*)currentheap + currentheap->headerSize; } } entry->wFlags = 0; if (*(DWORD *)ptr & ARENA_FLAG_FREE) { ARENA_FREE *pArena = (ARENA_FREE *)ptr; /*TRACE("free, magic: %04x\n", pArena->magic);*/ entry->lpData = pArena + 1; entry->cbData = pArena->size & ARENA_SIZE_MASK; entry->cbOverhead = sizeof(ARENA_FREE); entry->wFlags = PROCESS_HEAP_UNCOMMITTED_RANGE; } else { ARENA_INUSE *pArena = (ARENA_INUSE *)ptr; /*TRACE("busy, magic: %04x\n", pArena->magic);*/ entry->lpData = pArena + 1; entry->cbData = pArena->size & ARENA_SIZE_MASK; entry->cbOverhead = sizeof(ARENA_INUSE); entry->wFlags = PROCESS_HEAP_ENTRY_BUSY; /* FIXME: can't handle PROCESS_HEAP_ENTRY_MOVEABLE and PROCESS_HEAP_ENTRY_DDESHARE yet */ } entry->iRegionIndex = region_index; /* first element of heap ? */ if (ptr == (char *)(currentheap + currentheap->headerSize)) { entry->wFlags |= PROCESS_HEAP_REGION; entry->u.Region.dwCommittedSize = currentheap->commitSize; entry->u.Region.dwUnCommittedSize = currentheap->size - currentheap->commitSize; entry->u.Region.lpFirstBlock = /* first valid block */ currentheap + currentheap->headerSize; entry->u.Region.lpLastBlock = /* first invalid block */ currentheap + currentheap->size; } ret = TRUE; HW_end: if (!(heapPtr->flags & HEAP_NO_SERIALIZE)) LeaveCriticalSection( &heapPtr->critSection ); return ret; } /*********************************************************************** * GetProcessHeap (KERNEL32.@) */ HANDLE WINAPI GetProcessHeap(void) { return (HANDLE)processHeap; } /*********************************************************************** * GetProcessHeaps (KERNEL32.@) */ DWORD WINAPI GetProcessHeaps( DWORD count, HANDLE *heaps ) { DWORD total; HEAP *ptr; if (!processHeap) return 0; /* should never happen */ total = 1; /* main heap */ EnterCriticalSection( &processHeap->critSection ); for (ptr = firstHeap; ptr; ptr = ptr->next) total++; if (total <= count) { *heaps++ = (HANDLE)processHeap; for (ptr = firstHeap; ptr; ptr = ptr->next) *heaps++ = (HANDLE)ptr; } LeaveCriticalSection( &processHeap->critSection ); return total; } /*********************************************************************** * 32-bit local heap functions (Win95; undocumented) */ #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))) /*********************************************************************** * K208 (KERNEL.208) */ HANDLE WINAPI Local32Init16( WORD segment, DWORD tableSize, DWORD heapSize, DWORD flags ) { DWORD totSize, segSize = 0; LPBYTE base; LOCAL32HEADER *header; HEAP *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; } heap = (HEAP *)(base + segSize + HTABLE_SIZE); if ( !HEAP_InitSubHeap( heap, (LPVOID)heap, 0, 0x10000, heapSize ) ) { 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 = (HANDLE)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 ) { SUBHEAP *heapPtr; LPBYTE ptr; int i; LOCAL32HEADER *header = Local32_GetHeap( handle ); if ( !header ) return FALSE; if ( !pLocal32Info || pLocal32Info->dwSize < sizeof(LOCAL32INFO) ) return FALSE; heapPtr = (SUBHEAP *)HEAP_GetPtr( header->heap ); pLocal32Info->dwMemReserved = heapPtr->size; pLocal32Info->dwMemCommitted = heapPtr->commitSize; pLocal32Info->dwTotalFree = 0L; pLocal32Info->dwLargestFreeBlock = 0L; /* Note: Local32 heaps always have only one subheap! */ ptr = (LPBYTE)heapPtr + heapPtr->headerSize; while ( ptr < (LPBYTE)heapPtr + heapPtr->size ) { if (*(DWORD *)ptr & ARENA_FLAG_FREE) { ARENA_FREE *pArena = (ARENA_FREE *)ptr; DWORD size = (pArena->size & ARENA_SIZE_MASK); ptr += sizeof(*pArena) + size; pLocal32Info->dwTotalFree += size; if ( size > pLocal32Info->dwLargestFreeBlock ) pLocal32Info->dwLargestFreeBlock = size; } else { ARENA_INUSE *pArena = (ARENA_INUSE *)ptr; DWORD size = (pArena->size & ARENA_SIZE_MASK); ptr += sizeof(*pArena) + 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; }