diff options
Diffstat (limited to 'src/VBox/Runtime/r3/alloc-ef.h')
| -rw-r--r-- | src/VBox/Runtime/r3/alloc-ef.h | 220 |
1 files changed, 220 insertions, 0 deletions
diff --git a/src/VBox/Runtime/r3/alloc-ef.h b/src/VBox/Runtime/r3/alloc-ef.h new file mode 100644 index 00000000..4334bee9 --- /dev/null +++ b/src/VBox/Runtime/r3/alloc-ef.h @@ -0,0 +1,220 @@ +/* $Id: alloc-ef.h $ */ +/** @file + * IPRT - Memory Allocation, electric fence. + */ + +/* + * Copyright (C) 2006-2019 Oracle Corporation + * + * This file is part of VirtualBox Open Source Edition (OSE), as + * available from http://www.virtualbox.org. This file is free software; + * you can redistribute it and/or modify it under the terms of the GNU + * General Public License (GPL) as published by the Free Software + * Foundation, in version 2 as it comes in the "COPYING" file of the + * VirtualBox OSE distribution. VirtualBox OSE is distributed in the + * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind. + * + * The contents of this file may alternatively be used under the terms + * of the Common Development and Distribution License Version 1.0 + * (CDDL) only, as it comes in the "COPYING.CDDL" file of the + * VirtualBox OSE distribution, in which case the provisions of the + * CDDL are applicable instead of those of the GPL. + * + * You may elect to license modified versions of this file under the + * terms and conditions of either the GPL or the CDDL or both. + */ + +#ifndef IPRT_INCLUDED_SRC_r3_alloc_ef_h +#define IPRT_INCLUDED_SRC_r3_alloc_ef_h +#ifndef RT_WITHOUT_PRAGMA_ONCE +# pragma once +#endif + +/******************************************************************************* +* Defined Constants And Macros * +*******************************************************************************/ +#if defined(DOXYGEN_RUNNING) +# define RTALLOC_USE_EFENCE +# define RTALLOC_EFENCE_IN_FRONT +# define RTALLOC_EFENCE_FREE_FILL 'f' +#endif + +/** @def RTALLOC_USE_EFENCE + * If defined the electric fence put up for ALL allocations by RTMemAlloc(), + * RTMemAllocZ(), RTMemRealloc(), RTMemTmpAlloc() and RTMemTmpAllocZ(). + */ +#if 0 +# define RTALLOC_USE_EFENCE +#endif + +/** @def RTALLOC_EFENCE_SIZE + * The size of the fence. This must be page aligned. + */ +#define RTALLOC_EFENCE_SIZE PAGE_SIZE + +/** @def RTALLOC_EFENCE_ALIGNMENT + * The allocation alignment, power of two of course. + * + * Use this for working around misaligned sizes, usually stemming from + * allocating a string or something after the main structure. When you + * encounter this, please fix the allocation to RTMemAllocVar or RTMemAllocZVar. + */ +#if 0 +# define RTALLOC_EFENCE_ALIGNMENT (ARCH_BITS / 8) +#else +# define RTALLOC_EFENCE_ALIGNMENT 1 +#endif + +/** @def RTALLOC_EFENCE_IN_FRONT + * Define this to put the fence up in front of the block. + * The default (when this isn't defined) is to up it up after the block. + */ +//# define RTALLOC_EFENCE_IN_FRONT + +/** @def RTALLOC_EFENCE_TRACE + * Define this to support actual free and reallocation of blocks. + */ +#define RTALLOC_EFENCE_TRACE + +/** @def RTALLOC_EFENCE_FREE_DELAYED + * This define will enable free() delay and protection of the freed data + * while it's being delayed. The value of RTALLOC_EFENCE_FREE_DELAYED defines + * the threshold of the delayed blocks. + * Delayed blocks does not consume any physical memory, only virtual address space. + * Requires RTALLOC_EFENCE_TRACE. + */ +#define RTALLOC_EFENCE_FREE_DELAYED (20 * _1M) + +/** @def RTALLOC_EFENCE_FREE_FILL + * This define will enable memset(,RTALLOC_EFENCE_FREE_FILL,)'ing the user memory + * in the block before freeing/decommitting it. This is useful in GDB since GDB + * appears to be able to read the content of the page even after it's been + * decommitted. + * Requires RTALLOC_EFENCE_TRACE. + */ +#if defined(RT_OS_LINUX) || defined(RT_OS_SOLARIS) || defined(DOXYGEN_RUNNING) +# define RTALLOC_EFENCE_FREE_FILL 'f' +#endif + +/** @def RTALLOC_EFENCE_FILLER + * This define will enable memset(,RTALLOC_EFENCE_FILLER,)'ing the allocated + * memory when the API doesn't require it to be zero'd. + */ +#define RTALLOC_EFENCE_FILLER 0xef + +/** @def RTALLOC_EFENCE_NOMAN_FILLER + * This define will enable memset(,RTALLOC_EFENCE_NOMAN_FILLER,)'ing the + * unprotected but not allocated area of memory, the so called no man's land. + */ +#define RTALLOC_EFENCE_NOMAN_FILLER 0xaa + +/** @def RTALLOC_EFENCE_FENCE_FILLER + * This define will enable memset(,RTALLOC_EFENCE_FENCE_FILLER,)'ing the + * fence itself, as debuggers can usually read them. + */ +#define RTALLOC_EFENCE_FENCE_FILLER 0xcc + +#if defined(DOXYGEN_RUNNING) +/** @def RTALLOC_EFENCE_CPP + * This define will enable the new and delete wrappers. + */ +# define RTALLOC_EFENCE_CPP +#endif + +#if defined(RUNNING_DOXYGEN) +/** @def RTALLOC_REPLACE_MALLOC + * Replaces the malloc, calloc, realloc, free and friends in libc (experimental). + * Set in LocalConfig.kmk. Requires RTALLOC_EFENCE_TRACE to work. */ +# define RTALLOC_REPLACE_MALLOC +#endif +#if defined(RTALLOC_REPLACE_MALLOC) && !defined(RTALLOC_EFENCE_TRACE) +# error "RTALLOC_REPLACE_MALLOC requires RTALLOC_EFENCE_TRACE." +#endif + + +/******************************************************************************* +* Header Files * +*******************************************************************************/ +#ifdef RT_OS_WINDOWS +# include <iprt/win/windows.h> +#else +# include <sys/mman.h> +#endif +#include <iprt/avl.h> +#include <iprt/thread.h> + + +/******************************************************************************* +* Structures and Typedefs * +*******************************************************************************/ +/** + * Allocation types. + */ +typedef enum RTMEMTYPE +{ + RTMEMTYPE_RTMEMALLOC, + RTMEMTYPE_RTMEMALLOCZ, + RTMEMTYPE_RTMEMREALLOC, + RTMEMTYPE_RTMEMFREE, + + RTMEMTYPE_NEW, + RTMEMTYPE_NEW_ARRAY, + RTMEMTYPE_DELETE, + RTMEMTYPE_DELETE_ARRAY +} RTMEMTYPE; + +#ifdef RTALLOC_EFENCE_TRACE +/** + * Node tracking a memory allocation. + */ +typedef struct RTMEMBLOCK +{ + /** Avl node code, key is the user block pointer. */ + AVLPVNODECORE Core; + /** Allocation type. */ + RTMEMTYPE enmType; + /** The unaligned size of the block. */ + size_t cbUnaligned; + /** The aligned size of the block. */ + size_t cbAligned; + /** The allocation tag (read-only string). */ + const char *pszTag; + /** The return address of the allocator function. */ + void *pvCaller; + /** Line number of the alloc call. */ + unsigned iLine; + /** File from within the allocation was made. */ + const char *pszFile; + /** Function from within the allocation was made. */ + const char *pszFunction; +} RTMEMBLOCK, *PRTMEMBLOCK; + +#endif + + +/******************************************************************************* +* Internal Functions * +******************************************************************************/ +RT_C_DECLS_BEGIN +RTDECL(void *) rtR3MemAlloc(const char *pszOp, RTMEMTYPE enmType, size_t cbUnaligned, size_t cbAligned, + const char *pszTag, void *pvCaller, RT_SRC_POS_DECL); +RTDECL(void *) rtR3MemRealloc(const char *pszOp, RTMEMTYPE enmType, void *pvOld, size_t cbNew, + const char *pszTag, void *pvCaller, RT_SRC_POS_DECL); +RTDECL(void) rtR3MemFree(const char *pszOp, RTMEMTYPE enmType, void *pv, void *pvCaller, RT_SRC_POS_DECL); +RT_C_DECLS_END + + +/******************************************************************************* +* Global Variables * +*******************************************************************************/ +#ifdef RTALLOC_REPLACE_MALLOC +RT_C_DECLS_BEGIN +extern void * (*g_pfnOrgMalloc)(size_t); +extern void * (*g_pfnOrgCalloc)(size_t, size_t); +extern void * (*g_pfnOrgRealloc)(void *, size_t); +extern void (*g_pfnOrgFree)(void *); +RT_C_DECLS_END +#endif + +#endif /* !IPRT_INCLUDED_SRC_r3_alloc_ef_h */ + |