/* * msvcrt.dll heap functions * * Copyright 2000 Jon Griffiths * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA * * Note: Win32 heap operations are MT safe. We only lock the new * handler and non atomic heap operations */ #include "msvcrt.h" #include "mtdll.h" #include "wine/debug.h" WINE_DEFAULT_DEBUG_CHANNEL(msvcrt); /* MT */ #define LOCK_HEAP _mlock( _HEAP_LOCK ) #define UNLOCK_HEAP _munlock( _HEAP_LOCK ) /* _aligned */ #define SAVED_PTR(x) ((void *)((DWORD_PTR)((char *)x - sizeof(void *)) & \ ~(sizeof(void *) - 1))) #define ALIGN_PTR(ptr, alignment, offset) ((void *) \ ((((DWORD_PTR)((char *)ptr + alignment + sizeof(void *) + offset)) & \ ~(alignment - 1)) - offset)) typedef void (CDECL *MSVCRT_new_handler_func)(MSVCRT_size_t size); static MSVCRT_new_handler_func MSVCRT_new_handler; static int MSVCRT_new_mode; /* FIXME - According to documentation it should be 8*1024, at runtime it returns 16 */ static unsigned int MSVCRT_amblksiz = 16; /* FIXME - According to documentation it should be 480 bytes, at runtime default is 0 */ static MSVCRT_size_t MSVCRT_sbh_threshold = 0; /********************************************************************* * ??2@YAPAXI@Z (MSVCRT.@) */ void* CDECL MSVCRT_operator_new(MSVCRT_size_t size) { void *retval = HeapAlloc(GetProcessHeap(), 0, size); TRACE("(%ld) returning %p\n", size, retval); if(retval) return retval; LOCK_HEAP; if(MSVCRT_new_handler) (*MSVCRT_new_handler)(size); UNLOCK_HEAP; return retval; } /********************************************************************* * ??2@YAPAXIHPBDH@Z (MSVCRT.@) */ void* CDECL MSVCRT_operator_new_dbg(MSVCRT_size_t size, int type, const char *file, int line) { return MSVCRT_operator_new( size ); } /********************************************************************* * ??3@YAXPAX@Z (MSVCRT.@) */ void CDECL MSVCRT_operator_delete(void *mem) { TRACE("(%p)\n", mem); HeapFree(GetProcessHeap(), 0, mem); } /********************************************************************* * ?_query_new_handler@@YAP6AHI@ZXZ (MSVCRT.@) */ MSVCRT_new_handler_func CDECL MSVCRT__query_new_handler(void) { return MSVCRT_new_handler; } /********************************************************************* * ?_query_new_mode@@YAHXZ (MSVCRT.@) */ int CDECL MSVCRT__query_new_mode(void) { return MSVCRT_new_mode; } /********************************************************************* * ?_set_new_handler@@YAP6AHI@ZP6AHI@Z@Z (MSVCRT.@) */ MSVCRT_new_handler_func CDECL MSVCRT__set_new_handler(MSVCRT_new_handler_func func) { MSVCRT_new_handler_func old_handler; LOCK_HEAP; old_handler = MSVCRT_new_handler; MSVCRT_new_handler = func; UNLOCK_HEAP; return old_handler; } /********************************************************************* * ?set_new_handler@@YAP6AXXZP6AXXZ@Z (MSVCRT.@) */ MSVCRT_new_handler_func CDECL MSVCRT_set_new_handler(void *func) { TRACE("(%p)\n",func); MSVCRT__set_new_handler(NULL); return NULL; } /********************************************************************* * ?_set_new_mode@@YAHH@Z (MSVCRT.@) */ int CDECL MSVCRT__set_new_mode(int mode) { int old_mode; LOCK_HEAP; old_mode = MSVCRT_new_mode; MSVCRT_new_mode = mode; UNLOCK_HEAP; return old_mode; } /********************************************************************* * _callnewh (MSVCRT.@) */ int CDECL _callnewh(MSVCRT_size_t size) { if(MSVCRT_new_handler) (*MSVCRT_new_handler)(size); return 0; } /********************************************************************* * _expand (MSVCRT.@) */ void* CDECL _expand(void* mem, MSVCRT_size_t size) { return HeapReAlloc(GetProcessHeap(), HEAP_REALLOC_IN_PLACE_ONLY, mem, size); } /********************************************************************* * _heapchk (MSVCRT.@) */ int CDECL _heapchk(void) { if (!HeapValidate( GetProcessHeap(), 0, NULL)) { msvcrt_set_errno(GetLastError()); return MSVCRT__HEAPBADNODE; } return MSVCRT__HEAPOK; } /********************************************************************* * _heapmin (MSVCRT.@) */ int CDECL _heapmin(void) { if (!HeapCompact( GetProcessHeap(), 0 )) { if (GetLastError() != ERROR_CALL_NOT_IMPLEMENTED) msvcrt_set_errno(GetLastError()); return -1; } return 0; } /********************************************************************* * _heapwalk (MSVCRT.@) */ int CDECL _heapwalk(struct MSVCRT__heapinfo* next) { PROCESS_HEAP_ENTRY phe; LOCK_HEAP; phe.lpData = next->_pentry; phe.cbData = next->_size; phe.wFlags = next->_useflag == MSVCRT__USEDENTRY ? PROCESS_HEAP_ENTRY_BUSY : 0; if (phe.lpData && phe.wFlags & PROCESS_HEAP_ENTRY_BUSY && !HeapValidate( GetProcessHeap(), 0, phe.lpData )) { UNLOCK_HEAP; msvcrt_set_errno(GetLastError()); return MSVCRT__HEAPBADNODE; } do { if (!HeapWalk( GetProcessHeap(), &phe )) { UNLOCK_HEAP; if (GetLastError() == ERROR_NO_MORE_ITEMS) return MSVCRT__HEAPEND; msvcrt_set_errno(GetLastError()); if (!phe.lpData) return MSVCRT__HEAPBADBEGIN; return MSVCRT__HEAPBADNODE; } } while (phe.wFlags & (PROCESS_HEAP_REGION|PROCESS_HEAP_UNCOMMITTED_RANGE)); UNLOCK_HEAP; next->_pentry = phe.lpData; next->_size = phe.cbData; next->_useflag = phe.wFlags & PROCESS_HEAP_ENTRY_BUSY ? MSVCRT__USEDENTRY : MSVCRT__FREEENTRY; return MSVCRT__HEAPOK; } /********************************************************************* * _heapset (MSVCRT.@) */ int CDECL _heapset(unsigned int value) { int retval; struct MSVCRT__heapinfo heap; memset( &heap, 0, sizeof(heap) ); LOCK_HEAP; while ((retval = _heapwalk(&heap)) == MSVCRT__HEAPOK) { if (heap._useflag == MSVCRT__FREEENTRY) memset(heap._pentry, value, heap._size); } UNLOCK_HEAP; return retval == MSVCRT__HEAPEND? MSVCRT__HEAPOK : retval; } /********************************************************************* * _heapadd (MSVCRT.@) */ int CDECL _heapadd(void* mem, MSVCRT_size_t size) { TRACE("(%p,%ld) unsupported in Win32\n", mem,size); *MSVCRT__errno() = MSVCRT_ENOSYS; return -1; } /********************************************************************* * _heapadd (MSVCRT.@) */ MSVCRT_intptr_t CDECL _get_heap_handle(void) { return (MSVCRT_intptr_t)GetProcessHeap(); } /********************************************************************* * _msize (MSVCRT.@) */ MSVCRT_size_t CDECL _msize(void* mem) { MSVCRT_size_t size = HeapSize(GetProcessHeap(),0,mem); if (size == ~(MSVCRT_size_t)0) { WARN(":Probably called with non wine-allocated memory, ret = -1\n"); /* At least the Win32 crtdll/msvcrt also return -1 in this case */ } return size; } /********************************************************************* * calloc (MSVCRT.@) */ void* CDECL MSVCRT_calloc(MSVCRT_size_t size, MSVCRT_size_t count) { return HeapAlloc( GetProcessHeap(), HEAP_ZERO_MEMORY, size * count ); } /********************************************************************* * free (MSVCRT.@) */ void CDECL MSVCRT_free(void* ptr) { HeapFree(GetProcessHeap(),0,ptr); } /********************************************************************* * malloc (MSVCRT.@) */ void* CDECL MSVCRT_malloc(MSVCRT_size_t size) { void *ret = HeapAlloc(GetProcessHeap(),0,size); if (!ret) *MSVCRT__errno() = MSVCRT_ENOMEM; return ret; } /********************************************************************* * realloc (MSVCRT.@) */ void* CDECL MSVCRT_realloc(void* ptr, MSVCRT_size_t size) { if (!ptr) return MSVCRT_malloc(size); if (size) return HeapReAlloc(GetProcessHeap(), 0, ptr, size); MSVCRT_free(ptr); return NULL; } /********************************************************************* * __p__amblksiz (MSVCRT.@) */ unsigned int* CDECL __p__amblksiz(void) { return &MSVCRT_amblksiz; } /********************************************************************* * _get_sbh_threshold (MSVCRT.@) */ MSVCRT_size_t CDECL _get_sbh_threshold(void) { return MSVCRT_sbh_threshold; } /********************************************************************* * _set_sbh_threshold (MSVCRT.@) */ int CDECL _set_sbh_threshold(MSVCRT_size_t threshold) { if(threshold > 1016) return 0; else MSVCRT_sbh_threshold = threshold; return 1; } /********************************************************************* * _aligned_free (MSVCRT.@) */ void CDECL _aligned_free(void *memblock) { TRACE("(%p)\n", memblock); if (memblock) { void **saved = SAVED_PTR(memblock); MSVCRT_free(*saved); } } /********************************************************************* * _aligned_offset_malloc (MSVCRT.@) */ void * CDECL _aligned_offset_malloc(MSVCRT_size_t size, MSVCRT_size_t alignment, MSVCRT_size_t offset) { void *memblock, *temp, **saved; TRACE("(%lu, %lu, %lu)\n", size, alignment, offset); /* alignment must be a power of 2 */ if ((alignment & (alignment - 1)) != 0) { *MSVCRT__errno() = MSVCRT_EINVAL; return NULL; } /* offset must be less than size */ if (offset >= size) { *MSVCRT__errno() = MSVCRT_EINVAL; return NULL; } /* don't align to less than void pointer size */ if (alignment < sizeof(void *)) alignment = sizeof(void *); /* allocate enough space for void pointer and alignment */ temp = MSVCRT_malloc(size + alignment + sizeof(void *)); if (!temp) return NULL; /* adjust pointer for proper alignment and offset */ memblock = ALIGN_PTR(temp, alignment, offset); /* Save the real allocation address below returned address */ /* so it can be found later to free. */ saved = SAVED_PTR(memblock); *saved = temp; return memblock; } /********************************************************************* * _aligned_malloc (MSVCRT.@) */ void * CDECL _aligned_malloc(MSVCRT_size_t size, MSVCRT_size_t alignment) { TRACE("(%lu, %lu)\n", size, alignment); return _aligned_offset_malloc(size, alignment, 0); } /********************************************************************* * _aligned_offset_realloc (MSVCRT.@) */ void * CDECL _aligned_offset_realloc(void *memblock, MSVCRT_size_t size, MSVCRT_size_t alignment, MSVCRT_size_t offset) { void * temp, **saved; MSVCRT_size_t old_padding, new_padding, old_size; TRACE("(%p, %lu, %lu, %lu)\n", memblock, size, alignment, offset); if (!memblock) return _aligned_offset_malloc(size, alignment, offset); /* alignment must be a power of 2 */ if ((alignment & (alignment - 1)) != 0) { *MSVCRT__errno() = MSVCRT_EINVAL; return NULL; } /* offset must be less than size */ if (offset >= size) { *MSVCRT__errno() = MSVCRT_EINVAL; return NULL; } if (size == 0) { _aligned_free(memblock); return NULL; } /* don't align to less than void pointer size */ if (alignment < sizeof(void *)) alignment = sizeof(void *); /* make sure alignment and offset didn't change */ saved = SAVED_PTR(memblock); if (memblock != ALIGN_PTR(*saved, alignment, offset)) { *MSVCRT__errno() = MSVCRT_EINVAL; return NULL; } old_padding = (char *)memblock - (char *)*saved; /* Get previous size of block */ old_size = _msize(*saved); if (old_size == -1) { /* It seems this function was called with an invalid pointer. Bail out. */ return NULL; } /* Adjust old_size to get amount of actual data in old block. */ if (old_size < old_padding) { /* Shouldn't happen. Something's weird, so bail out. */ return NULL; } old_size -= old_padding; temp = MSVCRT_realloc(*saved, size + alignment + sizeof(void *)); if (!temp) return NULL; /* adjust pointer for proper alignment and offset */ memblock = ALIGN_PTR(temp, alignment, offset); /* Save the real allocation address below returned address */ /* so it can be found later to free. */ saved = SAVED_PTR(memblock); new_padding = (char *)memblock - (char *)temp; /* Memory layout of old block is as follows: +-------+---------------------+-+--------------------------+-----------+ | ... | "old_padding" bytes | | ... "old_size" bytes ... | ... | +-------+---------------------+-+--------------------------+-----------+ ^ ^ ^ | | | *saved saved memblock Memory layout of new block is as follows: +-------+-----------------------------+-+----------------------+-------+ | ... | "new_padding" bytes | | ... "size" bytes ... | ... | +-------+-----------------------------+-+----------------------+-------+ ^ ^ ^ | | | temp saved memblock However, in the new block, actual data is still written as follows (because it was copied by MSVCRT_realloc): +-------+---------------------+--------------------------------+-------+ | ... | "old_padding" bytes | ... "old_size" bytes ... | ... | +-------+---------------------+--------------------------------+-------+ ^ ^ ^ | | | temp saved memblock Therefore, min(old_size,size) bytes of actual data have to be moved from the offset they were at in the old block (temp + old_padding), to the offset they have to be in the new block (temp + new_padding == memblock). */ if (new_padding != old_padding) memmove((char *)memblock, (char *)temp + old_padding, (old_size < size) ? old_size : size); *saved = temp; return memblock; } /********************************************************************* * _aligned_realloc (MSVCRT.@) */ void * CDECL _aligned_realloc(void *memblock, MSVCRT_size_t size, MSVCRT_size_t alignment) { TRACE("(%p, %lu, %lu)\n", memblock, size, alignment); return _aligned_offset_realloc(memblock, size, alignment, 0); } /********************************************************************* * memmove_s (MSVCRT.@) */ int CDECL memmove_s(void *dest, MSVCRT_size_t numberOfElements, const void *src, MSVCRT_size_t count) { TRACE("(%p %lu %p %lu)\n", dest, numberOfElements, src, count); if(!count) return 0; if(!dest || !src) { if(dest) memset(dest, 0, numberOfElements); *MSVCRT__errno() = MSVCRT_EINVAL; return MSVCRT_EINVAL; } if(count > numberOfElements) { memset(dest, 0, numberOfElements); *MSVCRT__errno() = MSVCRT_ERANGE; return MSVCRT_ERANGE; } memmove(dest, src, count); return 0; } /********************************************************************* * strncpy_s (MSVCRT.@) */ int CDECL strncpy_s(char *dest, MSVCRT_size_t numberOfElements, const char *src, MSVCRT_size_t count) { MSVCRT_size_t i, end; TRACE("(%s %lu %s %lu)\n", dest, numberOfElements, src, count); if(!count) return 0; if(!dest || !src || !numberOfElements) { MSVCRT__invalid_parameter(NULL, NULL, NULL, 0, 0); *MSVCRT__errno() = MSVCRT_EINVAL; return MSVCRT_EINVAL; } if(count!=_TRUNCATE && count