/* * Win32 heap functions * * Copyright 1996 Alexandre Julliard */ #include #include #include #include #include "windows.h" #include "selectors.h" #include "winbase.h" #include "winerror.h" #include "winnt.h" #include "heap.h" #include "stddebug.h" #include "debug.h" /* 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 threadId; /* Allocating thread id */ WORD magic; /* Magic number */ DWORD callerEIP; /* EIP of caller upon allocation */ } ARENA_INUSE; typedef struct tagARENA_FREE { DWORD size; /* Block size; must be the first field */ WORD threadId; /* Freeing thread id */ WORD magic; /* Magic number */ 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 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 */ HANDLE32 SystemHeap = 0; HANDLE32 SegptrHeap = 0; CRITICAL_SECTION *HEAP_SystemLock = NULL; /*********************************************************************** * HEAP_Dump */ void HEAP_Dump( HEAP *heap ) { int i; SUBHEAP *subheap; char *ptr; printf( "Heap: %08lx\n", (DWORD)heap ); printf( "Next: %08lx Sub-heaps: %08lx", (DWORD)heap->next, (DWORD)&heap->subheap ); subheap = &heap->subheap; while (subheap->next) { printf( " -> %08lx", (DWORD)subheap->next ); subheap = subheap->next; } printf( "\nFree lists:\n Block Stat Size Id\n" ); for (i = 0; i < HEAP_NB_FREE_LISTS; i++) printf( "%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; printf( "\n\nSub-heap %08lx: size=%08lx committed=%08lx\n", (DWORD)subheap, subheap->size, subheap->commitSize ); printf( "\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; printf( "%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; printf( "%08lx Used %08lx %04x back=%08lx EIP=%08lx\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; printf( "%08lx used %08lx %04x EIP=%08lx\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; } } printf( "\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 */ static HEAP *HEAP_GetPtr( HANDLE32 heap ) { HEAP *heapPtr = (HEAP *)heap; if (!heapPtr || (heapPtr->magic != HEAP_MAGIC)) { fprintf( stderr, "Invalid heap %08x!\n", heap ); SetLastError( ERROR_INVALID_HANDLE ); return NULL; } if (debugging_heap && !HeapValidate( heap, 0, NULL )) { 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. */ static SUBHEAP *HEAP_FindSubHeap( HEAP *heap, LPCVOID ptr ) { 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 BOOL32 HEAP_Commit( SUBHEAP *subheap, void *ptr ) { DWORD size = (DWORD)((char *)ptr - (char *)subheap); size = (size + 0xfff) & 0xfffff000; /* Align size on a page boundary */ 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)) { fprintf( stderr, "HEAP_Commit: 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 BOOL32 HEAP_Decommit( SUBHEAP *subheap, void *ptr ) { DWORD size = (DWORD)((char *)ptr - (char *)subheap); size = (size + 0xfff) & 0xfffff000; /* Align size on a page boundary */ if (size >= subheap->commitSize) return TRUE; if (!VirtualFree( (char *)subheap + size, subheap->commitSize - size, MEM_DECOMMIT )) { fprintf( stderr, "HEAP_Decommit: 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 (debugging_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 (debugging_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) FreeSelector( subheap->selector ); VirtualFree( subheap, 0, MEM_RELEASE ); return; } /* Decommit the end of the heap */ 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 ); pArena->size = (pArena->size & ~ARENA_SIZE_MASK) | size; } 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_CreateSubHeap * * Create a sub-heap of the given size. */ static SUBHEAP *HEAP_CreateSubHeap( DWORD flags, DWORD commitSize, DWORD totalSize ) { SUBHEAP *subheap; WORD selector = 0; /* 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 (!(subheap = VirtualAlloc( NULL, totalSize, MEM_RESERVE, PAGE_EXECUTE_READWRITE ))) { fprintf( stderr, "HEAP_CreateSubHeap: could not VirtualAlloc %08lx bytes\n", totalSize ); return NULL; } if (!VirtualAlloc(subheap, commitSize, MEM_COMMIT, PAGE_EXECUTE_READWRITE)) { fprintf( stderr, "HEAP_CreateSubHeap: could not commit %08lx bytes for sub-heap %08lx\n", commitSize, (DWORD)subheap ); VirtualFree( subheap, 0, MEM_RELEASE ); return NULL; } /* Allocate a selector if needed */ if (flags & HEAP_WINE_SEGPTR) { selector = SELECTOR_AllocBlock( subheap, totalSize, (flags & HEAP_WINE_CODESEG) ? SEGMENT_CODE : SEGMENT_DATA, (flags & HEAP_WINE_CODESEG) != 0, FALSE ); if (!selector) { fprintf( stderr, "HEAP_CreateSubHeap: could not allocate selector\n" ); VirtualFree( subheap, 0, MEM_RELEASE ); return NULL; } } /* Fill the sub-heap structure */ subheap->size = totalSize; subheap->commitSize = commitSize; subheap->headerSize = sizeof(*subheap); subheap->next = NULL; subheap->heap = NULL; subheap->magic = SUBHEAP_MAGIC; subheap->selector = selector; return subheap; } /*********************************************************************** * 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)) { fprintf( stderr, "HEAP_FindFreeBlock: Not enough space in heap %08lx for %08lx bytes\n", (DWORD)heap, size ); return NULL; } size += sizeof(SUBHEAP) + sizeof(ARENA_FREE); if (!(subheap = HEAP_CreateSubHeap( heap->flags, size, MAX( HEAP_DEF_SIZE, size ) ))) return NULL; /* Insert the new sub-heap in the list */ subheap->heap = heap; subheap->next = heap->subheap.next; heap->subheap.next = subheap; size = subheap->size; dprintf_heap( stddeb, "HEAP_FindFreeBlock: created new sub-heap %08lx of %08lx bytes for heap %08lx\n", (DWORD)subheap, size, (DWORD)heap ); HEAP_CreateFreeBlock( subheap, subheap + 1, size - sizeof(*subheap) ); *ppSubHeap = subheap; return (ARENA_FREE *)(subheap + 1); } /*********************************************************************** * HEAP_IsValidArenaPtr * * Check that the pointer is inside the range possible for arenas. */ static BOOL32 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 BOOL32 HEAP_ValidateFreeArena( SUBHEAP *subheap, ARENA_FREE *pArena ) { char *heapEnd = (char *)subheap + subheap->size; /* Check magic number */ if (pArena->magic != ARENA_FREE_MAGIC) { fprintf( stderr, "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)) { fprintf( stderr, "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) { fprintf( stderr, "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 )) { fprintf( stderr, "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)) { fprintf( stderr, "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 )) { fprintf( stderr, "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)) { fprintf( stderr, "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)) { fprintf( stderr, "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) { fprintf( stderr, "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 BOOL32 HEAP_ValidateInUseArena( SUBHEAP *subheap, ARENA_INUSE *pArena ) { char *heapEnd = (char *)subheap + subheap->size; /* Check magic number */ if (pArena->magic != ARENA_INUSE_MAGIC) { fprintf( stderr, "Heap %08lx: invalid in-use arena magic for %08lx\n", (DWORD)subheap->heap, (DWORD)pArena ); return FALSE; } /* Check size flags */ if (pArena->size & ARENA_FLAG_FREE) { fprintf( stderr, "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) { fprintf( stderr, "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)) { fprintf( stderr, "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 )) { fprintf(stderr, "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)) { fprintf( stderr, "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) { fprintf( stderr, "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_IsInsideHeap * * Check whether the pointer is to a block inside a given heap. */ int HEAP_IsInsideHeap( HANDLE32 heap, DWORD flags, LPCVOID ptr ) { HEAP *heapPtr = HEAP_GetPtr( heap ); SUBHEAP *subheap; int ret; /* Validate the parameters */ if (!heapPtr) return 0; flags |= heapPtr->flags; if (!(flags & HEAP_NO_SERIALIZE)) HeapLock( heap ); ret = (((subheap = HEAP_FindSubHeap( heapPtr, ptr )) != NULL) && (((char *)ptr >= (char *)subheap + subheap->headerSize + sizeof(ARENA_INUSE)))); if (!(flags & HEAP_NO_SERIALIZE)) HeapUnlock( heap ); return ret; } /*********************************************************************** * HEAP_GetSegptr * * Transform a linear pointer into a SEGPTR. The pointer must have been * allocated from a HEAP_WINE_SEGPTR heap. */ SEGPTR HEAP_GetSegptr( HANDLE32 heap, DWORD flags, LPCVOID ptr ) { HEAP *heapPtr = HEAP_GetPtr( heap ); SUBHEAP *subheap; SEGPTR ret; /* Validate the parameters */ if (!heapPtr) return 0; flags |= heapPtr->flags; if (!(flags & HEAP_WINE_SEGPTR)) { fprintf( stderr, "HEAP_GetSegptr: heap %08x is not a SEGPTR heap\n", heap ); return 0; } if (!(flags & HEAP_NO_SERIALIZE)) HeapLock( heap ); /* Get the subheap */ if (!(subheap = HEAP_FindSubHeap( heapPtr, ptr ))) { fprintf( stderr, "HEAP_GetSegptr: %p is not inside heap %08x\n", ptr, heap ); if (!(flags & HEAP_NO_SERIALIZE)) HeapUnlock( heap ); return 0; } /* Build the SEGPTR */ ret = PTR_SEG_OFF_TO_SEGPTR(subheap->selector, (DWORD)ptr-(DWORD)subheap); if (!(flags & HEAP_NO_SERIALIZE)) HeapUnlock( heap ); return ret; } /*********************************************************************** * HeapCreate (KERNEL32.336) */ HANDLE32 WINAPI HeapCreate( DWORD flags, DWORD initialSize, DWORD maxSize ) { int i; HEAP *heap; SUBHEAP *subheap; FREE_LIST_ENTRY *pEntry; /* Allocate the heap block */ if (!maxSize) { maxSize = HEAP_DEF_SIZE; flags |= HEAP_GROWABLE; } if (!(subheap = HEAP_CreateSubHeap( flags, initialSize, maxSize ))) { SetLastError( ERROR_OUTOFMEMORY ); return 0; } /* Fill the heap structure */ heap = (HEAP *)subheap; subheap->heap = heap; subheap->headerSize = sizeof(HEAP); 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; } /* Create the first free block */ HEAP_CreateFreeBlock( subheap, heap + 1, subheap->size - sizeof(*heap) ); /* Initialize critical section */ InitializeCriticalSection( &heap->critSection ); if (!SystemHeap) HEAP_SystemLock = &heap->critSection; /* We are done */ return (HANDLE32)heap; } /*********************************************************************** * HeapDestroy (KERNEL32.337) */ BOOL32 WINAPI HeapDestroy( HANDLE32 heap ) { HEAP *heapPtr = HEAP_GetPtr( heap ); SUBHEAP *subheap; dprintf_heap( stddeb, "HeapDestroy: %08x\n", heap ); if (!heapPtr) return FALSE; DeleteCriticalSection( &heapPtr->critSection ); subheap = &heapPtr->subheap; while (subheap) { SUBHEAP *next = subheap->next; if (subheap->selector) FreeSelector( subheap->selector ); VirtualFree( subheap, 0, MEM_RELEASE ); subheap = next; } return TRUE; } /*********************************************************************** * HeapAlloc (KERNEL32.334) */ LPVOID WINAPI HeapAlloc( HANDLE32 heap, DWORD flags, DWORD size ) { ARENA_FREE *pArena; ARENA_INUSE *pInUse; SUBHEAP *subheap; HEAP *heapPtr = HEAP_GetPtr( heap ); /* Validate the parameters */ if (!heapPtr) return NULL; flags &= HEAP_GENERATE_EXCEPTIONS | HEAP_NO_SERIALIZE | HEAP_ZERO_MEMORY; flags |= heapPtr->flags; if (!(flags & HEAP_NO_SERIALIZE)) HeapLock( heap ); size = (size + 3) & ~3; if (size < HEAP_MIN_BLOCK_SIZE) size = HEAP_MIN_BLOCK_SIZE; /* Locate a suitable free block */ if (!(pArena = HEAP_FindFreeBlock( heapPtr, size, &subheap ))) { dprintf_heap( stddeb, "HeapAlloc(%08x,%08lx,%08lx): returning NULL\n", heap, flags, size ); if (!(flags & HEAP_NO_SERIALIZE)) HeapUnlock( heap ); 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; pInUse->size = (pInUse->size & ~ARENA_FLAG_FREE) + sizeof(ARENA_FREE) - sizeof(ARENA_INUSE); pInUse->callerEIP = *((DWORD *)&heap - 1); /* hack hack */ 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, size ); else if (debugging_heap) memset( pInUse + 1, ARENA_INUSE_FILLER, size ); if (!(flags & HEAP_NO_SERIALIZE)) HeapUnlock( heap ); dprintf_heap( stddeb, "HeapAlloc(%08x,%08lx,%08lx): returning %08lx\n", heap, flags, size, (DWORD)(pInUse + 1) ); return (LPVOID)(pInUse + 1); } /*********************************************************************** * HeapFree (KERNEL32.338) */ BOOL32 WINAPI HeapFree( HANDLE32 heap, DWORD flags, LPVOID ptr ) { ARENA_INUSE *pInUse; SUBHEAP *subheap; HEAP *heapPtr = HEAP_GetPtr( heap ); /* Validate the parameters */ if (!heapPtr) return FALSE; flags &= HEAP_NO_SERIALIZE; flags |= heapPtr->flags; if (!(flags & HEAP_NO_SERIALIZE)) HeapLock( heap ); if (!ptr || !HeapValidate( heap, HEAP_NO_SERIALIZE, ptr )) { if (!(flags & HEAP_NO_SERIALIZE)) HeapUnlock( heap ); SetLastError( ERROR_INVALID_PARAMETER ); dprintf_heap( stddeb, "HeapFree(%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)) HeapUnlock( heap ); /* SetLastError( 0 ); */ dprintf_heap( stddeb, "HeapFree(%08x,%08lx,%08lx): returning TRUE\n", heap, flags, (DWORD)ptr ); return TRUE; } /*********************************************************************** * HeapReAlloc (KERNEL32.340) */ LPVOID WINAPI HeapReAlloc( HANDLE32 heap, DWORD flags, LPVOID ptr, DWORD size ) { ARENA_INUSE *pArena; DWORD oldSize; HEAP *heapPtr; SUBHEAP *subheap; if (!ptr) return HeapAlloc( heap, flags, size ); /* FIXME: correct? */ 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)) HeapLock( heap ); if (!HeapValidate( heap, HEAP_NO_SERIALIZE, ptr )) { if (!(flags & HEAP_NO_SERIALIZE)) HeapUnlock( heap ); SetLastError( ERROR_INVALID_PARAMETER ); dprintf_heap( stddeb, "HeapReAlloc(%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)) HeapUnlock( heap ); 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)) HeapUnlock( heap ); 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 (debugging_heap) memset( (char *)(pArena + 1) + oldSize, ARENA_INUSE_FILLER, (pArena->size & ARENA_SIZE_MASK) - oldSize ); } /* Return the new arena */ pArena->callerEIP = *((DWORD *)&heap - 1); /* hack hack */ if (!(flags & HEAP_NO_SERIALIZE)) HeapUnlock( heap ); dprintf_heap( stddeb, "HeapReAlloc(%08x,%08lx,%08lx,%08lx): returning %08lx\n", heap, flags, (DWORD)ptr, size, (DWORD)(pArena + 1) ); return (LPVOID)(pArena + 1); } /*********************************************************************** * HeapCompact (KERNEL32.335) */ DWORD WINAPI HeapCompact( HANDLE32 heap, DWORD flags ) { return 0; } /*********************************************************************** * HeapLock (KERNEL32.339) */ BOOL32 WINAPI HeapLock( HANDLE32 heap ) { HEAP *heapPtr = HEAP_GetPtr( heap ); if (!heapPtr) return FALSE; EnterCriticalSection( &heapPtr->critSection ); return TRUE; } /*********************************************************************** * HeapUnlock (KERNEL32.342) */ BOOL32 WINAPI HeapUnlock( HANDLE32 heap ) { HEAP *heapPtr = HEAP_GetPtr( heap ); if (!heapPtr) return FALSE; LeaveCriticalSection( &heapPtr->critSection ); return TRUE; } /*********************************************************************** * HeapSize (KERNEL32.341) */ DWORD WINAPI HeapSize( HANDLE32 heap, DWORD flags, LPVOID ptr ) { DWORD ret; HEAP *heapPtr = HEAP_GetPtr( heap ); if (!heapPtr) return FALSE; flags &= HEAP_NO_SERIALIZE; flags |= heapPtr->flags; if (!(flags & HEAP_NO_SERIALIZE)) HeapLock( heap ); if (!HeapValidate( heap, HEAP_NO_SERIALIZE, ptr )) { 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)) HeapUnlock( heap ); dprintf_heap( stddeb, "HeapSize(%08x,%08lx,%08lx): returning %08lx\n", heap, flags, (DWORD)ptr, ret ); return ret; } /*********************************************************************** * HeapValidate (KERNEL32.343) */ BOOL32 WINAPI HeapValidate( HANDLE32 heap, DWORD flags, LPCVOID block ) { SUBHEAP *subheap; HEAP *heapPtr = (HEAP *)heap; if (!heapPtr || (heapPtr->magic != HEAP_MAGIC)) { fprintf( stderr, "Invalid heap %08x!\n", heap ); return FALSE; } if (block) { if (!(subheap = HEAP_FindSubHeap( heapPtr, block )) || ((char *)block < (char *)subheap + subheap->headerSize + sizeof(ARENA_INUSE))) { fprintf( stderr, "Heap %08lx: block %08lx is not inside heap\n", (DWORD)heap, (DWORD)block ); return FALSE; } return HEAP_ValidateInUseArena( subheap, (ARENA_INUSE *)block - 1 ); } subheap = &heapPtr->subheap; while (subheap) { 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 )) return FALSE; ptr += sizeof(ARENA_FREE) + (*(DWORD *)ptr & ARENA_SIZE_MASK); } else { if (!HEAP_ValidateInUseArena( subheap, (ARENA_INUSE *)ptr )) return FALSE; ptr += sizeof(ARENA_INUSE) + (*(DWORD *)ptr & ARENA_SIZE_MASK); } } subheap = subheap->next; } return TRUE; } /*********************************************************************** * HeapWalk (KERNEL32.344) */ BOOL32 WINAPI HeapWalk( HANDLE32 heap, void *entry ) { fprintf( stderr, "HeapWalk(%08x): not implemented\n", heap ); return FALSE; } /*********************************************************************** * HEAP_xalloc * * Same as HeapAlloc(), but die on failure. */ LPVOID HEAP_xalloc( HANDLE32 heap, DWORD flags, DWORD size ) { LPVOID p = HeapAlloc( heap, flags, size ); if (!p) { fprintf( stderr, "Virtual memory exhausted.\n" ); exit(1); } return p; } /*********************************************************************** * HEAP_strdupA */ LPSTR HEAP_strdupA( HANDLE32 heap, DWORD flags, LPCSTR str ) { LPSTR p = HEAP_xalloc( heap, flags, lstrlen32A(str) + 1 ); lstrcpy32A( p, str ); return p; } /*********************************************************************** * HEAP_strdupW */ LPWSTR HEAP_strdupW( HANDLE32 heap, DWORD flags, LPCWSTR str ) { INT32 len = lstrlen32W(str) + 1; LPWSTR p = HEAP_xalloc( heap, flags, len * sizeof(WCHAR) ); lstrcpy32W( p, str ); return p; } /*********************************************************************** * HEAP_strdupAtoW */ LPWSTR HEAP_strdupAtoW( HANDLE32 heap, DWORD flags, LPCSTR str ) { LPWSTR ret; if (!str) return NULL; ret = HEAP_xalloc( heap, flags, (lstrlen32A(str)+1) * sizeof(WCHAR) ); lstrcpyAtoW( ret, str ); return ret; } /*********************************************************************** * HEAP_strdupWtoA */ LPSTR HEAP_strdupWtoA( HANDLE32 heap, DWORD flags, LPCWSTR str ) { LPSTR ret; if (!str) return NULL; ret = HEAP_xalloc( heap, flags, lstrlen32W(str) + 1 ); lstrcpyWtoA( ret, str ); return ret; }