/*
* Copyright (c) 1999, 2002, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code 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 General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/*
* Debug Memory Manager
*
* - inits allocated memory to predefined byte to expose uninitialized variables
* - fills freed memory with predefined byte to expose dangling pointers
* - catches under/overwrites with 'guard' bytes around allocated blocks
* - tags blocks with the file name and line number where they were allocated
* - reports unfreed blocks to help find memory leaks
*
*/
#if !defined(_DEBUGMEM_H)
#define _DEBUGMEM_H
#if defined(__cplusplus)
extern "C" {
#endif
#if defined(DEBUG)
#include "debug_util.h"
/* prototype for allocation callback function */
typedef void * (*DMEM_ALLOCFN)(size_t size);
/* prototype for deallocation callback function */
typedef void (*DMEM_FREEFN)(void * pointer);
/* prototype for pointer validation function */
typedef dbool_t (*DMEM_CHECKPTRFN)(void * ptr, size_t size);
/* Debug memory manager global state */
/* DO NOT REFERENCE this structure in code, it is only exported */
/* to ease it's use inside a source level debugger */
typedef struct DMemState {
DMEM_ALLOCFN pfnAlloc; /* block allocate callback */
DMEM_FREEFN pfnFree; /* block free callback */
DMEM_CHECKPTRFN pfnCheckPtr; /* pointer validation callback */
size_t biggestBlock; /* largest block allocated so far */
size_t maxHeap; /* maximum size of the debug heap */
size_t totalHeapUsed; /* total memory allocated so far */
dbool_t failNextAlloc; /* whether the next allocation fails (automatically resets)*/
int totalAllocs; /* total number of allocations so far */
} DMemState;
/* Exported global var so you can view/change settings in the debugger */
extern const DMemState * DMemStatePtr;
/* General memory manager functions */
extern void DMem_Initialize();
extern void DMem_Shutdown();
extern void * DMem_AllocateBlock(size_t size, const char * filename, int linenumber);
extern void DMem_FreeBlock(void *ptr);
extern void DMem_ReportLeaks();
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