1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
|
/* $Id: alloc-win.cpp $ */
/** @file
* IPRT - Memory Allocation, Windows.
*/
/*
* 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
*/
/*********************************************************************************************************************************
* 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());
}
|
