diff options
Diffstat (limited to 'src/VBox/Runtime/r3/win/alloc-win.cpp')
| -rw-r--r-- | src/VBox/Runtime/r3/win/alloc-win.cpp | 210 |
1 files changed, 210 insertions, 0 deletions
diff --git a/src/VBox/Runtime/r3/win/alloc-win.cpp b/src/VBox/Runtime/r3/win/alloc-win.cpp new file mode 100644 index 00000000..2f6f1efd --- /dev/null +++ b/src/VBox/Runtime/r3/win/alloc-win.cpp @@ -0,0 +1,210 @@ +/* $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()); +} + |