+++ /dev/null
-/*
- * Copyright (c) 2000-2004 Apple Computer, Inc. All Rights Reserved.
- *
- * @APPLE_LICENSE_HEADER_START@
- *
- * This file contains Original Code and/or Modifications of Original Code
- * as defined in and that are subject to the Apple Public Source License
- * Version 2.0 (the 'License'). You may not use this file except in
- * compliance with the License. Please obtain a copy of the License at
- * http://www.opensource.apple.com/apsl/ and read it before using this
- * file.
- *
- * The Original Code and all software distributed under the License are
- * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
- * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
- * Please see the License for the specific language governing rights and
- * limitations under the License.
- *
- * @APPLE_LICENSE_HEADER_END@
- */
-
-
-//
-// cssmalloc - memory allocation in the CDSA world.
-//
-// Don't eat heavily before inspecting this code.
-//
-#include <security_utilities/alloc.h>
-#include <security_utilities/memutils.h>
-#include <security_utilities/globalizer.h>
-#include <stdlib.h>
-#include <errno.h>
-
-using LowLevelMemoryUtilities::alignof;
-using LowLevelMemoryUtilities::increment;
-using LowLevelMemoryUtilities::alignUp;
-
-extern "C" size_t malloc_size(void *);
-
-
-//
-// Features of the Allocator root class
-//
-bool Allocator::operator == (const Allocator &alloc) const throw()
-{
- return this == &alloc;
-}
-
-Allocator::~Allocator()
-{
-}
-
-
-//
-// Standard Allocator variants.
-// Note that all calls to Allocator::standard(xxx) with the same xxx argument
-// must produce compatible allocators (i.e. they must be work on a common memory
-// pool). This is trivially achieved here by using singletons.
-//
-struct DefaultAllocator : public Allocator {
- void *malloc(size_t size) throw(std::bad_alloc);
- void free(void *addr) throw();
- void *realloc(void *addr, size_t size) throw(std::bad_alloc);
-};
-
-struct SensitiveAllocator : public DefaultAllocator {
- void free(void *addr) throw();
- void *realloc(void *addr, size_t size) throw(std::bad_alloc);
-};
-
-struct DefaultAllocators {
- DefaultAllocator standard;
- SensitiveAllocator sensitive;
-};
-
-static ModuleNexus<DefaultAllocators> defaultAllocators;
-
-
-Allocator &Allocator::standard(UInt32 request)
-{
- switch (request) {
- case normal:
- return defaultAllocators().standard;
- case sensitive:
- return defaultAllocators().sensitive;
- default:
- UnixError::throwMe(ENOMEM);
- }
-}
-
-void *DefaultAllocator::malloc(size_t size) throw(std::bad_alloc)
-{
- if (void *result = ::malloc(size))
- return result;
- throw std::bad_alloc();
-}
-
-void DefaultAllocator::free(void *addr) throw()
-{
- ::free(addr);
-}
-
-void *DefaultAllocator::realloc(void *addr, size_t newSize) throw(std::bad_alloc)
-{
- if (void *result = ::realloc(addr, newSize))
- return result;
- throw std::bad_alloc();
-}
-
-void SensitiveAllocator::free(void *addr) throw()
-{
- memset(addr, 0, malloc_size(addr));
- DefaultAllocator::free(addr);
-}
-
-void *SensitiveAllocator::realloc(void *addr, size_t newSize) throw(std::bad_alloc)
-{
- size_t oldSize = malloc_size(addr);
- if (newSize < oldSize)
- memset(increment(addr, newSize), 0, oldSize - newSize);
- return DefaultAllocator::realloc(addr, newSize);
-}
-
-
-//
-// Memory allocators for CssmHeap objects.
-// This implementation stores a pointer to the allocator used into memory
-// *after* the object's proper storage block. This allows the usual free()
-// functions to safely free our (hidden) pointer without knowing about it.
-// An allocator argument of NULL is interpreted as the standard allocator.
-//
-void *CssmHeap::operator new (size_t size, Allocator *alloc) throw(std::bad_alloc)
-{
- if (alloc == NULL)
- alloc = &Allocator::standard();
- size = alignUp(size, alignof<Allocator *>());
- size_t totalSize = size + sizeof(Allocator *);
- void *addr = alloc->malloc(totalSize);
- *(Allocator **)increment(addr, size) = alloc;
- return addr;
-}
-
-void CssmHeap::operator delete (void *addr, size_t size, Allocator *alloc) throw()
-{
- alloc->free(addr); // as per C++ std, called (only) if construction fails
-}
-
-void CssmHeap::operator delete (void *addr, size_t size) throw()
-{
- void *end = increment(addr, alignUp(size, alignof<Allocator *>()));
- (*(Allocator **)end)->free(addr);
-}
-
-
-//
-// CssmVector
-//