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/* $Id: alloc.cpp $ */
/** @file
* IPRT - Memory Allocation.
*/
/*
* Copyright (C) 2006-2023 Oracle and/or its affiliates.
*
* This file is part of VirtualBox base platform packages, as
* available from https://www.virtualbox.org.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation, in version 3 of the
* License.
*
* This program 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 for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <https://www.gnu.org/licenses>.
*
* The contents of this file may alternatively be used under the terms
* of the Common Development and Distribution License Version 1.0
* (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
* in the VirtualBox 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.
*
* SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
*/
/*********************************************************************************************************************************
* Defined Constants And Macros *
*********************************************************************************************************************************/
#if defined(RTMEM_WRAP_TO_EF_APIS) && !defined(RTMEM_NO_WRAP_TO_EF_APIS)
# undef RTMEM_WRAP_TO_EF_APIS
# define RTALLOC_USE_EFENCE 1
#endif
/*#define RTMEMALLOC_USE_TRACKER*/
/* Don't enable the tracker when building the minimal IPRT. */
#ifdef RT_MINI
# undef RTMEMALLOC_USE_TRACKER
#endif
#if defined(RTMEMALLOC_USE_TRACKER) && defined(RTALLOC_USE_EFENCE)
# error "Cannot define both RTMEMALLOC_USE_TRACKER and RTALLOC_USE_EFENCE!"
#endif
/*********************************************************************************************************************************
* Header Files *
*********************************************************************************************************************************/
#include "alloc-ef.h"
#include <iprt/mem.h>
#include <iprt/asm.h>
#include <iprt/assert.h>
#ifdef RTMEMALLOC_USE_TRACKER
# include <iprt/memtracker.h>
#endif
#include <iprt/param.h>
#include <iprt/string.h>
#include "internal/mem.h"
#include <stdlib.h>
#undef RTMemTmpAlloc
#undef RTMemTmpAllocTag
#undef RTMemTmpAllocZ
#undef RTMemTmpAllocZTag
#undef RTMemTmpFree
#undef RTMemTmpFreeZ
#undef RTMemAlloc
#undef RTMemAllocTag
#undef RTMemAllocZ
#undef RTMemAllocZTag
#undef RTMemAllocVar
#undef RTMemAllocVarTag
#undef RTMemAllocZVar
#undef RTMemAllocZVarTag
#undef RTMemRealloc
#undef RTMemReallocTag
#undef RTMemFree
#undef RTMemFreeZ
#undef RTMemDup
#undef RTMemDupTag
#undef RTMemDupEx
#undef RTMemDupExTag
#undef RTALLOC_USE_EFENCE
#ifdef IPRT_WITH_GCC_SANITIZER
/**
* Checks if @a pszTag is a leak tag.
*
* @returns true if leak tag, false if not.
* @param pszTag Tage to inspect.
*/
DECLINLINE(bool) rtMemIsLeakTag(const char *pszTag)
{
char ch = *pszTag;
if (ch != 'w')
{ /* likely */ }
else
return pszTag[1] == 'i'
&& pszTag[2] == 'l'
&& pszTag[3] == 'l'
&& pszTag[4] == '-'
&& pszTag[5] == 'l'
&& pszTag[6] == 'e'
&& pszTag[7] == 'a'
&& pszTag[8] == 'k';
if (ch != 'm')
return false;
return pszTag[1] == 'm'
&& pszTag[2] == 'a'
&& pszTag[3] == 'y'
&& pszTag[4] == '-'
&& pszTag[5] == 'l'
&& pszTag[6] == 'e'
&& pszTag[7] == 'a'
&& pszTag[8] == 'k';
}
#endif /* IPRT_WITH_GCC_SANITIZER */
RTDECL(void *) RTMemTmpAllocTag(size_t cb, const char *pszTag) RT_NO_THROW_DEF
{
return RTMemAllocTag(cb, pszTag);
}
RTDECL(void *) RTMemTmpAllocZTag(size_t cb, const char *pszTag) RT_NO_THROW_DEF
{
return RTMemAllocZTag(cb, pszTag);
}
RTDECL(void) RTMemTmpFree(void *pv) RT_NO_THROW_DEF
{
RTMemFree(pv);
}
RTDECL(void) RTMemTmpFreeZ(void *pv, size_t cb) RT_NO_THROW_DEF
{
RTMemFreeZ(pv, cb);
}
RTDECL(void *) RTMemAllocTag(size_t cb, const char *pszTag) RT_NO_THROW_DEF
{
#ifdef RTALLOC_USE_EFENCE
void *pv = rtR3MemAlloc("Alloc", RTMEMTYPE_RTMEMALLOC, cb, cb, pszTag, ASMReturnAddress(), NULL, 0, NULL);
#else /* !RTALLOC_USE_EFENCE */
AssertMsg(cb, ("Allocating ZERO bytes is really not a good idea! Good luck with the next assertion!\n"));
# ifdef RTMEMALLOC_USE_TRACKER
void *pv = RTMemTrackerHdrAlloc(malloc(cb + sizeof(RTMEMTRACKERHDR)), cb, pszTag, ASMReturnAddress(), RTMEMTRACKERMETHOD_ALLOC);
# else
void *pv = malloc(cb); NOREF(pszTag);
# endif
AssertMsg(pv, ("malloc(%#zx) failed!!!\n", cb));
AssertMsg( cb < RTMEM_ALIGNMENT
|| !((uintptr_t)pv & (RTMEM_ALIGNMENT - 1))
|| ( (cb & RTMEM_ALIGNMENT) + ((uintptr_t)pv & RTMEM_ALIGNMENT)) == RTMEM_ALIGNMENT
, ("pv=%p RTMEM_ALIGNMENT=%#x\n", pv, RTMEM_ALIGNMENT));
#endif /* !RTALLOC_USE_EFENCE */
#ifdef IPRT_WITH_GCC_SANITIZER
if (rtMemIsLeakTag(pszTag))
__lsan_ignore_object(pv);
#endif
return pv;
}
RTDECL(void *) RTMemAllocZTag(size_t cb, const char *pszTag) RT_NO_THROW_DEF
{
#ifdef RTALLOC_USE_EFENCE
void *pv = rtR3MemAlloc("AllocZ", RTMEMTYPE_RTMEMALLOCZ, cb, cb, pszTag, ASMReturnAddress(), NULL, 0, NULL);
#else /* !RTALLOC_USE_EFENCE */
AssertMsg(cb, ("Allocating ZERO bytes is really not a good idea! Good luck with the next assertion!\n"));
# ifdef RTMEMALLOC_USE_TRACKER
void *pv = RTMemTrackerHdrAlloc(calloc(1, cb + sizeof(RTMEMTRACKERHDR)), cb, pszTag, ASMReturnAddress(), RTMEMTRACKERMETHOD_ALLOCZ);
#else
void *pv = calloc(1, cb); NOREF(pszTag);
#endif
AssertMsg(pv, ("calloc(1,%#zx) failed!!!\n", cb));
AssertMsg( cb < RTMEM_ALIGNMENT
|| !((uintptr_t)pv & (RTMEM_ALIGNMENT - 1))
|| ( (cb & RTMEM_ALIGNMENT) + ((uintptr_t)pv & RTMEM_ALIGNMENT)) == RTMEM_ALIGNMENT
, ("pv=%p RTMEM_ALIGNMENT=%#x\n", pv, RTMEM_ALIGNMENT));
#endif /* !RTALLOC_USE_EFENCE */
#ifdef IPRT_WITH_GCC_SANITIZER
if (rtMemIsLeakTag(pszTag))
__lsan_ignore_object(pv);
#endif
return pv;
}
RTDECL(void *) RTMemAllocVarTag(size_t cbUnaligned, const char *pszTag) RT_NO_THROW_DEF
{
size_t cbAligned;
if (cbUnaligned >= 16)
cbAligned = RT_ALIGN_Z(cbUnaligned, 16);
else
cbAligned = RT_ALIGN_Z(cbUnaligned, sizeof(void *));
#ifdef RTALLOC_USE_EFENCE
void *pv = rtR3MemAlloc("AllocVar", RTMEMTYPE_RTMEMALLOC, cbUnaligned, cbAligned, pszTag, ASMReturnAddress(), NULL, 0, NULL);
#else
void *pv = RTMemAllocTag(cbAligned, pszTag);
#endif
return pv;
}
RTDECL(void *) RTMemAllocZVarTag(size_t cbUnaligned, const char *pszTag) RT_NO_THROW_DEF
{
size_t cbAligned;
if (cbUnaligned >= 16)
cbAligned = RT_ALIGN_Z(cbUnaligned, 16);
else
cbAligned = RT_ALIGN_Z(cbUnaligned, sizeof(void *));
#ifdef RTALLOC_USE_EFENCE
void *pv = rtR3MemAlloc("AllocZVar", RTMEMTYPE_RTMEMALLOCZ, cbUnaligned, cbAligned, pszTag, ASMReturnAddress(), NULL, 0, NULL);
#else
void *pv = RTMemAllocZTag(cbAligned, pszTag);
#endif
return pv;
}
RTDECL(void *) RTMemReallocTag(void *pvOld, size_t cbNew, const char *pszTag) RT_NO_THROW_DEF
{
#ifdef RTALLOC_USE_EFENCE
void *pv = rtR3MemRealloc("Realloc", RTMEMTYPE_RTMEMREALLOC, pvOld, cbNew, pszTag, ASMReturnAddress(), NULL, 0, NULL);
#else /* !RTALLOC_USE_EFENCE */
# ifdef RT_STRICT
const uintptr_t uOld = (uintptr_t)pvOld; /* overzealous gcc 12 complains it's used over realloc */
# endif
# ifdef RTMEMALLOC_USE_TRACKER
void *pvRealOld = RTMemTrackerHdrReallocPrep(pvOld, 0, pszTag, ASMReturnAddress());
size_t cbRealNew = cbNew || !pvRealOld ? cbNew + sizeof(RTMEMTRACKERHDR) : 0;
void *pvNew = realloc(pvRealOld, cbRealNew);
void *pv = RTMemTrackerHdrReallocDone(pvNew, cbNew, pvOld, pszTag, ASMReturnAddress());
# else
void *pv = realloc(pvOld, cbNew); NOREF(pszTag);
# endif
AssertMsg(pv || !cbNew, ("realloc(%p, %#zx) failed!!!\n", uOld, cbNew));
AssertMsg( cbNew < RTMEM_ALIGNMENT
|| !((uintptr_t)pv & (RTMEM_ALIGNMENT - 1))
|| ( (cbNew & RTMEM_ALIGNMENT) + ((uintptr_t)pv & RTMEM_ALIGNMENT)) == RTMEM_ALIGNMENT
, ("pv=%p RTMEM_ALIGNMENT=%#x\n", pv, RTMEM_ALIGNMENT));
#endif /* !RTALLOC_USE_EFENCE */
return pv;
}
RTDECL(void) RTMemFree(void *pv) RT_NO_THROW_DEF
{
if (pv)
#ifdef RTALLOC_USE_EFENCE
rtR3MemFree("Free", RTMEMTYPE_RTMEMFREE, pv, 0, ASMReturnAddress(), NULL, 0, NULL);
#else
# ifdef RTMEMALLOC_USE_TRACKER
pv = RTMemTrackerHdrFree(pv, 0, NULL, ASMReturnAddress(), RTMEMTRACKERMETHOD_FREE);
# endif
free(pv);
#endif
}
RTDECL(void) RTMemFreeZ(void *pv, size_t cb) RT_NO_THROW_DEF
{
if (pv)
{
#ifdef RTALLOC_USE_EFENCE
rtR3MemFree("Free", RTMEMTYPE_RTMEMFREEZ, pv, cb, ASMReturnAddress(), NULL, 0, NULL);
#else
# ifdef RTMEMALLOC_USE_TRACKER
pv = RTMemTrackerHdrFree(pv, cb, NULL, ASMReturnAddress(), RTMEMTRACKERMETHOD_FREE);
# endif
RT_BZERO(pv, cb);
free(pv);
#endif
}
}
DECLHIDDEN(void *) rtMemBaseAlloc(size_t cb)
{
Assert(cb > 0 && cb < _1M);
return malloc(cb);
}
DECLHIDDEN(void) rtMemBaseFree(void *pv)
{
free(pv);
}
|
