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/* $Id: alloc-win.cpp $ */
/** @file
* IPRT - Memory Allocation, Windows.
*/
/*
* Copyright (C) 2006-2022 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
*/
/*********************************************************************************************************************************
* Header Files *
*********************************************************************************************************************************/
#ifdef IPRT_NO_CRT
# define USE_VIRTUAL_ALLOC
#endif
#define LOG_GROUP RTLOGGROUP_MEM
#include <iprt/win/windows.h>
#include <iprt/alloc.h>
#include <iprt/assert.h>
#include <iprt/param.h>
#include <iprt/string.h>
#include <iprt/errcore.h>
#ifndef USE_VIRTUAL_ALLOC
# include <malloc.h>
#endif
RTDECL(void *) RTMemPageAllocTag(size_t cb, const char *pszTag) RT_NO_THROW_DEF
{
RT_NOREF_PV(pszTag);
#ifdef USE_VIRTUAL_ALLOC
void *pv = VirtualAlloc(NULL, RT_ALIGN_Z(cb, PAGE_SIZE), MEM_COMMIT, PAGE_READWRITE);
#else
void *pv = _aligned_malloc(RT_ALIGN_Z(cb, PAGE_SIZE), PAGE_SIZE);
#endif
AssertMsg(pv, ("cb=%d lasterr=%d\n", cb, GetLastError()));
return pv;
}
RTDECL(void *) RTMemPageAllocExTag(size_t cb, uint32_t fFlags, const char *pszTag) RT_NO_THROW_DEF
{
size_t const cbAligned = RT_ALIGN_Z(cb, PAGE_SIZE);
RT_NOREF_PV(pszTag);
AssertReturn(!(fFlags & ~RTMEMPAGEALLOC_F_VALID_MASK), NULL);
#ifdef USE_VIRTUAL_ALLOC
void *pv = VirtualAlloc(NULL, cbAligned, MEM_COMMIT, PAGE_READWRITE);
#else
void *pv = _aligned_malloc(cbAligned, PAGE_SIZE);
#endif
AssertMsgReturn(pv, ("cb=%d lasterr=%d\n", cb, GetLastError()), NULL);
if (fFlags & RTMEMPAGEALLOC_F_ADVISE_LOCKED)
{
/** @todo check why we get ERROR_WORKING_SET_QUOTA here. */
BOOL const fOkay = VirtualLock(pv, cbAligned);
AssertMsg(fOkay || GetLastError() == ERROR_WORKING_SET_QUOTA, ("pv=%p cb=%d lasterr=%d\n", pv, cb, GetLastError()));
NOREF(fOkay);
}
if (fFlags & RTMEMPAGEALLOC_F_ZERO)
RT_BZERO(pv, cbAligned);
return pv;
}
RTDECL(void *) RTMemPageAllocZTag(size_t cb, const char *pszTag) RT_NO_THROW_DEF
{
RT_NOREF_PV(pszTag);
#ifdef USE_VIRTUAL_ALLOC
void *pv = VirtualAlloc(NULL, RT_ALIGN_Z(cb, PAGE_SIZE), MEM_COMMIT, PAGE_READWRITE);
#else
void *pv = _aligned_malloc(RT_ALIGN_Z(cb, PAGE_SIZE), PAGE_SIZE);
#endif
if (pv)
{
memset(pv, 0, RT_ALIGN_Z(cb, PAGE_SIZE));
return pv;
}
AssertMsgFailed(("cb=%d lasterr=%d\n", cb, GetLastError()));
return NULL;
}
RTDECL(void) RTMemPageFree(void *pv, size_t cb) RT_NO_THROW_DEF
{
RT_NOREF_PV(cb);
if (pv)
{
#ifdef USE_VIRTUAL_ALLOC
if (!VirtualFree(pv, 0, MEM_RELEASE))
AssertMsgFailed(("pv=%p lasterr=%d\n", pv, GetLastError()));
#else
_aligned_free(pv);
#endif
}
}
RTDECL(int) RTMemProtect(void *pv, size_t cb, unsigned fProtect) RT_NO_THROW_DEF
{
/*
* Validate input.
*/
if (cb == 0)
{
AssertMsgFailed(("!cb\n"));
return VERR_INVALID_PARAMETER;
}
if (fProtect & ~(RTMEM_PROT_NONE | RTMEM_PROT_READ | RTMEM_PROT_WRITE | RTMEM_PROT_EXEC))
{
AssertMsgFailed(("fProtect=%#x\n", fProtect));
return VERR_INVALID_PARAMETER;
}
/*
* Convert the flags.
*/
int fProt;
Assert(!RTMEM_PROT_NONE);
switch (fProtect & (RTMEM_PROT_NONE | RTMEM_PROT_READ | RTMEM_PROT_WRITE | RTMEM_PROT_EXEC))
{
case RTMEM_PROT_NONE:
fProt = PAGE_NOACCESS;
break;
case RTMEM_PROT_READ:
fProt = PAGE_READONLY;
break;
case RTMEM_PROT_READ | RTMEM_PROT_WRITE:
fProt = PAGE_READWRITE;
break;
case RTMEM_PROT_READ | RTMEM_PROT_WRITE | RTMEM_PROT_EXEC:
fProt = PAGE_EXECUTE_READWRITE;
break;
case RTMEM_PROT_READ | RTMEM_PROT_EXEC:
fProt = PAGE_EXECUTE_READWRITE;
break;
case RTMEM_PROT_WRITE:
fProt = PAGE_READWRITE;
break;
case RTMEM_PROT_WRITE | RTMEM_PROT_EXEC:
fProt = PAGE_EXECUTE_READWRITE;
break;
case RTMEM_PROT_EXEC:
fProt = PAGE_EXECUTE_READWRITE;
break;
/* If the compiler had any brains it would warn about this case. */
default:
AssertMsgFailed(("fProtect=%#x\n", fProtect));
return VERR_INTERNAL_ERROR;
}
/*
* Align the request.
*/
cb += (uintptr_t)pv & PAGE_OFFSET_MASK;
pv = (void *)((uintptr_t)pv & ~(uintptr_t)PAGE_OFFSET_MASK);
/*
* Change the page attributes.
*/
DWORD fFlags = 0;
if (VirtualProtect(pv, cb, fProt, &fFlags))
return VINF_SUCCESS;
return RTErrConvertFromWin32(GetLastError());
}
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