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699 lines
16 KiB
699 lines
16 KiB
/*
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* Copyright (C) 2008 Sourcefire, Inc.
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*
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* Authors: aCaB <acab@clamav.net>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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* MA 02110-1301, USA.
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*/
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/* a naive pool allocator */
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#if HAVE_CONFIG_H
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#include "clamav-config.h"
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#endif
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#ifdef USE_MPOOL
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#if HAVE_STRING_H
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#include <string.h>
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#endif
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#include <sys/mman.h>
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#include <stddef.h>
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#include "others.h"
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#include "str.h"
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#include "readdb.h"
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#ifdef CL_DEBUG
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#include <assert.h>
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#define MPOOLMAGIC 0x5adeada5
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#define ALLOCPOISON 0x5a
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#define FREEPOISON 0xde
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#endif
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/* #define DEBUGMPOOL /\* DO NOT define *\/ */
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#ifdef DEBUGMPOOL
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#define spam(...) cli_warnmsg( __VA_ARGS__)
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#else
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static inline void spam(const char *fmt, ...) { fmt = fmt; } /* gcc STFU */
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#endif
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#include "mpool.h"
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/* #define MIN_FRAGSIZE 4096 /\* 1m2.282s *\/ */
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/* #define MIN_FRAGSIZE 8192 /\* 0m46.652s *\/ */
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/* #define MIN_FRAGSIZE 16384 /\* 0m8.365s *\/ */
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/* #define MIN_FRAGSIZE 32768 /\* 0m3.788s *\/ */
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/* #define MIN_FRAGSIZE 65536 /\* 0m2.759s *\/ */
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/* #define MIN_FRAGSIZE 131072 /\* 0m2.445s *\/ */
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#define MIN_FRAGSIZE 262144 /* 0m2.343s */
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/* #define MIN_FRAGSIZE 524288 /\* 0m2.387s *\/ */
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/* #define MIN_FRAGSIZE 1048576 /\* 0m2.392s *\/ */
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/* #define MIN_FRAGSIZE 2097152 /\* 0m2.402s *\/ */
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/* #define MIN_FRAGSIZE 99688128 */
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#if SIZEOF_VOID_P==8
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static const unsigned int fragsz[] = {
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16, /* 34660 */
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24, /* 99132 */
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32, /* 935424 */
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40, /* 20825 */
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48, /* 7338 */
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56, /* 536414 */
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64, /* 2853 */
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72, /* 2355 */
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80, /* 3701 */
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88, /* 2665 */
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96, /* 3719 */
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104, /* 3739 */
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112, /* 4104 */
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120, /* 5151 */
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128, /* 25576 */
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136, /* 4340 */
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144, /* 4308 */
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152, /* 12219 */
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160, /* 18013 */
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168, /* 329 */
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176, /* 343 */
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184, /* 207 */
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192, /* 227 */
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200, /* 169 */
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208, /* 188 */
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216, /* 231 */
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224, /* 175 */
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232, /* 154 */
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240, /* 179 */
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248, /* 140 */
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256, /* 141 */
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264, /* 142 */
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272, /* 163 */
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280, /* 125 */
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288, /* 142 */
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296, /* 102 */
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304, /* 96 */
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312, /* 67 */
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320, /* 15 */
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328, /* 21 */
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336, /* 21 */
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344, /* 12 */
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352, /* 11 */
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360, /* 6 */
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368, /* 15 */
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376, /* 5 */
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384, /* 5 */
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392, /* 4 */
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400, /* 3 */
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408, /* 8 */
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416, /* 5 */
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424, /* 4 */
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432, /* 4 */
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440, /* 3 */
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456, /* 1 */
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464, /* 8 */
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472, /* 3 */
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488, /* 1 */
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496, /* 4 */
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504, /* 3 */
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512, /* 1 */
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520, /* 1 */
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528, /* 6 */
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536, /* 2 */
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544, /* 1 */
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560, /* 4 */
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576, /* 2 */
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592, /* 10 */
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616, /* 2 */
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624, /* 6 */
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656, /* 1 */
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680, /* 1 */
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704, /* 1 */
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720, /* 1 */
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776, /* 1 */
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2056, /* 8545 */
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63504, /* 9 */
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144760, /* 1 */
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507976, /* 9 */
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525800, /* 1 */
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1051032, /* (0) */
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2097152
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/* ^^ This shouldn't be reached but it's a good fall back
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* MAX_ALLOCATION is 184549376 but that's really not need here */
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};
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#else
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static const unsigned int fragsz[] = {
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8, /* 2268 */
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12, /* 32386 */
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16, /* 59865 */
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20, /* 58019 */
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24, /* 789268 */
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28, /* 127523 */
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32, /* 539890 */
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36, /* 11729 */
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40, /* 1840 */
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44, /* 5492 */
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48, /* 1662 */
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52, /* 3855 */
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56, /* 1781 */
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60, /* 990 */
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64, /* 984 */
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68, /* 1370 */
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72, /* 1923 */
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76, /* 1778 */
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80, /* 1076 */
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84, /* 1591 */
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88, /* 2084 */
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92, /* 23812 */
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96, /* 1873 */
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100, /* 1863 */
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104, /* 1923 */
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108, /* 2177 */
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112, /* 1724 */
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116, /* 3424 */
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120, /* 2098 */
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124, /* 1308 */
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128, /* 2291 */
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132, /* 2032 */
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136, /* 2825 */
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140, /* 1477 */
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144, /* 1594 */
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148, /* 10617 */
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152, /* 2696 */
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156, /* 15313 */
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160, /* 182 */
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164, /* 144 */
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168, /* 197 */
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172, /* 144 */
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176, /* 118 */
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180, /* 85 */
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184, /* 121 */
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188, /* 105 */
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192, /* 84 */
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196, /* 85 */
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200, /* 97 */
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204, /* 90 */
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208, /* 149 */
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212, /* 83 */
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216, /* 75 */
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220, /* 98 */
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224, /* 83 */
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228, /* 73 */
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232, /* 114 */
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236, /* 63 */
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240, /* 75 */
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244, /* 65 */
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248, /* 72 */
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252, /* 67 */
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256, /* 69 */
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260, /* 73 */
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264, /* 93 */
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268, /* 69 */
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272, /* 56 */
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276, /* 68 */
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280, /* 71 */
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284, /* 72 */
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288, /* 61 */
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292, /* 41 */
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296, /* 53 */
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300, /* 42 */
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304, /* 37 */
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308, /* 30 */
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312, /* 9 */
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316, /* 5 */
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320, /* 6 */
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324, /* 13 */
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328, /* 13 */
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332, /* 8 */
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336, /* 5 */
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340, /* 5 */
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344, /* 3 */
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348, /* 7 */
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352, /* 1 */
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356, /* 4 */
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360, /* 14 */
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364, /* 2 */
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368, /* 3 */
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372, /* 2 */
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376, /* 4 */
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388, /* 4 */
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392, /* 3 */
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400, /* 3 */
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404, /* 3 */
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408, /* 3 */
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412, /* 2 */
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416, /* 3 */
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420, /* 1 */
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428, /* 4 */
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432, /* 1 */
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436, /* 2 */
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452, /* 2 */
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456, /* 8 */
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464, /* 1 */
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468, /* 2 */
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480, /* 1 */
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488, /* 4 */
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496, /* 1 */
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500, /* 1 */
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504, /* 1 */
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512, /* 1 */
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520, /* 6 */
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532, /* 1 */
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536, /* 1 */
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552, /* 4 */
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572, /* 3 */
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584, /* 9 */
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588, /* 1 */
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608, /* 1 */
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612, /* 1 */
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616, /* 6 */
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644, /* 1 */
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648, /* 1 */
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676, /* 1 */
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700, /* 1 */
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712, /* 1 */
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768, /* 1 */
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772, /* 1 */
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1028, /* 8545 */
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63500, /* 9 */
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144752, /* 1 */
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253988, /* 9 */
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525628, /* 1 */
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1051032, /* (0) */
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2097152
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};
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#endif
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#define FRAGSBITS (sizeof(fragsz)/sizeof(fragsz[0]))
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struct MPMAP {
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struct MPMAP *next;
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unsigned int size;
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unsigned int usize;
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};
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struct MP {
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unsigned int psize;
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struct FRAG *avail[FRAGSBITS];
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struct MPMAP mpm;
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};
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struct FRAG {
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union {
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struct FRAG *next;
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unsigned int sbits;
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} u;
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#ifdef CL_DEBUG
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unsigned int magic;
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#endif
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void *fake;
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};
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#define FRAG_OVERHEAD (offsetof(struct FRAG, fake))
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#define align_to_voidptr(size) (((size) / sizeof(void *) + ((size) % sizeof(void *) != 0)) * sizeof(void *))
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#define mpool_roundup(size) (FRAG_OVERHEAD + align_to_voidptr(size))
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static unsigned int align_to_pagesize(struct MP *mp, unsigned int size) {
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return (size / mp->psize + (size % mp->psize != 0)) * mp->psize;
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}
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static unsigned int to_bits(unsigned int size) {
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unsigned int i;
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for(i=0; i<FRAGSBITS; i++)
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if(fragsz[i] >= size) return i;
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return FRAGSBITS;
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}
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static unsigned int from_bits(unsigned int bits) {
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if (bits >= FRAGSBITS) return 0;
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return fragsz[bits];
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}
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struct MP *mpool_create() {
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struct MP mp, *mpool_p;
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unsigned int sz;
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memset(&mp, 0, sizeof(mp));
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mp.psize = cli_getpagesize();
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sz = align_to_pagesize(&mp, MIN_FRAGSIZE);
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mp.mpm.usize = align_to_voidptr(sizeof(struct MPMAP));
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mp.mpm.size = sz - align_to_voidptr(sizeof(mp));
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if ((mpool_p = (struct MP *)mmap(NULL, sz, PROT_READ | PROT_WRITE, MAP_PRIVATE|ANONYMOUS_MAP, -1, 0)) == MAP_FAILED)
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return NULL;
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#ifdef CL_DEBUG
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memset(mpool_p, ALLOCPOISON, sz);
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#endif
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memcpy(mpool_p, &mp, sizeof(mp));
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spam("Map created @ %p->%p - size %u out of %u\n", mpool_p, (char *)mpool_p + mp.mpm.size, mp.mpm.usize, mp.mpm.size);
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return mpool_p;
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}
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void mpool_destroy(struct MP *mp) {
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struct MPMAP *mpm_next = mp->mpm.next, *mpm;
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unsigned int mpmsize;
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while((mpm = mpm_next)) {
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mpmsize = mpm->size;
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mpm_next = mpm->next;
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#ifdef CL_DEBUG
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memset(mpm, FREEPOISON, mpmsize);
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#endif
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munmap((void *)mpm, mpmsize);
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}
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mpmsize = mp->mpm.size;
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#ifdef CL_DEBUG
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memset(mp, FREEPOISON, mpmsize + align_to_voidptr(sizeof(*mp)));
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#endif
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munmap((void *)mp, mpmsize + align_to_voidptr(sizeof(*mp)));
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spam("Map destroyed @ %p\n", mp);
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}
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void mpool_flush(struct MP *mp) {
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size_t used = 0, mused;
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struct MPMAP *mpm_next = mp->mpm.next, *mpm;
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while((mpm = mpm_next)) {
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mpm_next = mpm->next;
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#ifdef CL_DEBUG
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memset((char *)mpm + align_to_pagesize(mp, mpm->usize), FREEPOISON, mpm->size - align_to_pagesize(mp, mpm->usize));
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#endif
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munmap((char *)mpm + align_to_pagesize(mp, mpm->usize), mpm->size - align_to_pagesize(mp, mpm->usize));
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mpm->size = align_to_pagesize(mp, mpm->usize);
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used += mpm->size;
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}
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mused = align_to_pagesize(mp, mp->mpm.usize + align_to_voidptr(sizeof(*mp)));
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if (mused < mp->mpm.size) {
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#ifdef CL_DEBUG
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memset((char *)&mp->mpm + mused, FREEPOISON, mp->mpm.size - mused);
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#endif
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munmap((char *)&mp->mpm + mused, mp->mpm.size - mused);
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mp->mpm.size = mused;
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}
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used += mp->mpm.size;
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spam("Map flushed @ %p, in use: %lu\n", mp, used);
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}
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int mpool_getstats(const struct cl_engine *eng, size_t *used, size_t *total)
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{
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size_t sum_used = 0, sum_total = 0;
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const struct MPMAP *mpm;
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const mpool_t *mp;
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/* checking refcount is not necessary, but safer */
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if (!eng || !eng->refcount)
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return -1;
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mp = eng->mempool;
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if (!mp)
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return -1;
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for(mpm = &mp->mpm; mpm; mpm = mpm->next) {
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sum_used += mpm->usize;
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sum_total += mpm->size;
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}
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*used = sum_used;
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*total = sum_total;
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return 0;
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}
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void *mpool_malloc(struct MP *mp, size_t size) {
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unsigned int i, needed = align_to_voidptr(size + FRAG_OVERHEAD);
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const unsigned int sbits = to_bits(needed);
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struct FRAG *f = NULL;
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struct MPMAP *mpm = &mp->mpm;
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/* check_all(mp); */
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if (!size || sbits == FRAGSBITS) {
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cli_errmsg("mpool_malloc(): Attempt to allocate %lu bytes. Please report to http://bugs.clamav.net\n", (unsigned long int) size);
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return NULL;
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}
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/* Case 1: We have a free'd frag */
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if((f = mp->avail[sbits])) {
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spam("malloc %p size %u (freed)\n", f, mpool_roundup(size));
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mp->avail[sbits] = f->u.next;
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f->u.sbits = sbits;
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#ifdef CL_DEBUG
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f->magic = MPOOLMAGIC;
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memset(&f->fake, ALLOCPOISON, size);
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#endif
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return &f->fake;
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}
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if (!(needed = from_bits(sbits))) {
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cli_errmsg("mpool_malloc(): Attempt to allocate %lu bytes. Please report to http://bugs.clamav.net\n", (unsigned long int) size);
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return NULL;
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}
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/* Case 2: We have nuff room available for this frag already */
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while(mpm) {
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if(mpm->size - mpm->usize >= needed) {
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f = (struct FRAG *)((char *)mpm + mpm->usize);
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spam("malloc %p size %u (hole)\n", f, mpool_roundup(size));
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mpm->usize += needed;
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f->u.sbits = sbits;
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#ifdef CL_DEBUG
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f->magic = MPOOLMAGIC;
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memset(&f->fake, ALLOCPOISON, size);
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#endif
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return &f->fake;
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}
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mpm = mpm->next;
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}
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/* Case 3: We allocate more */
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if (needed + align_to_voidptr(sizeof(*mpm)) > MIN_FRAGSIZE)
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i = align_to_pagesize(mp, needed + align_to_voidptr(sizeof(*mpm)));
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else
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i = align_to_pagesize(mp, MIN_FRAGSIZE);
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if ((mpm = (struct MPMAP *)mmap(NULL, i, PROT_READ | PROT_WRITE, MAP_PRIVATE|ANONYMOUS_MAP, -1, 0)) == MAP_FAILED) {
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cli_errmsg("mpool_malloc(): Can't allocate memory (%lu bytes).\n", (unsigned long int)i);
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spam("failed to alloc %u bytes (%u requested)\n", i, size);
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return NULL;
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}
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#ifdef CL_DEBUG
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memset(mpm, ALLOCPOISON, i);
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#endif
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mpm->size = i;
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mpm->usize = needed + align_to_voidptr(sizeof(*mpm));
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mpm->next = mp->mpm.next;
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mp->mpm.next = mpm;
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f = (struct FRAG *)((char *)mpm + align_to_voidptr(sizeof(*mpm)));
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spam("malloc %p size %u (new map)\n", f, mpool_roundup(size));
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f->u.sbits = sbits;
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#ifdef CL_DEBUG
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f->magic = MPOOLMAGIC;
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#endif
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return &f->fake;
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}
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void mpool_free(struct MP *mp, void *ptr) {
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struct FRAG *f = (struct FRAG *)((char *)ptr - FRAG_OVERHEAD);
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unsigned int sbits;
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if (!ptr) return;
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#ifdef CL_DEBUG
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assert(f->magic == MPOOLMAGIC && "Attempt to mpool_free a pointer we did not allocate!");
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memset(ptr, FREEPOISON, from_bits(f->u.sbits) - FRAG_OVERHEAD);
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#endif
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sbits = f->u.sbits;
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f->u.next = mp->avail[sbits];
|
|
mp->avail[sbits] = f;
|
|
spam("free @ %p\n", f);
|
|
}
|
|
|
|
void *mpool_calloc(struct MP *mp, size_t nmemb, size_t size) {
|
|
unsigned int needed = nmemb*size;
|
|
void *ptr;
|
|
|
|
if(!needed) return NULL;
|
|
if((ptr = mpool_malloc(mp, needed)))
|
|
memset(ptr, 0, needed);
|
|
return ptr;
|
|
}
|
|
|
|
void *mpool_realloc(struct MP *mp, void *ptr, size_t size) {
|
|
struct FRAG *f = (struct FRAG *)((char *)ptr - FRAG_OVERHEAD);
|
|
unsigned int csize;
|
|
void *new_ptr;
|
|
if (!ptr) return mpool_malloc(mp, size);
|
|
|
|
spam("realloc @ %p (size %u -> %u))\n", f, from_bits(f->u.sbits), size);
|
|
if(!size || !(csize = from_bits(f->u.sbits))) {
|
|
cli_errmsg("mpool_realloc(): Attempt to allocate %lu bytes. Please report to http://bugs.clamav.net\n", (unsigned long int) size);
|
|
return NULL;
|
|
}
|
|
csize -= FRAG_OVERHEAD;
|
|
if (csize >= size && (!f->u.sbits || from_bits(f->u.sbits-1)-FRAG_OVERHEAD < size))
|
|
return ptr;
|
|
if (!(new_ptr = mpool_malloc(mp, size)))
|
|
return NULL;
|
|
memcpy(new_ptr, ptr, csize <= size ? csize : size);
|
|
mpool_free(mp, ptr);
|
|
return new_ptr;
|
|
}
|
|
|
|
void *mpool_realloc2(struct MP *mp, void *ptr, size_t size) {
|
|
struct FRAG *f = (struct FRAG *)((char *)ptr - FRAG_OVERHEAD);
|
|
unsigned int csize;
|
|
void *new_ptr;
|
|
|
|
if (!ptr) return mpool_malloc(mp, size);
|
|
|
|
spam("realloc @ %p (size %u -> %u))\n", f, from_bits(f->u.sbits), size);
|
|
if(!size || !(csize = from_bits(f->u.sbits))) {
|
|
cli_errmsg("mpool_realloc2(): Attempt to allocate %lu bytes. Please report to http://bugs.clamav.net\n", (unsigned long int) size);
|
|
mpool_free(mp, ptr);
|
|
return NULL;
|
|
}
|
|
csize -= FRAG_OVERHEAD;
|
|
if (csize >= size && (!f->u.sbits || from_bits(f->u.sbits-1)-FRAG_OVERHEAD < size))
|
|
return ptr;
|
|
if ((new_ptr = mpool_malloc(mp, size)))
|
|
memcpy(new_ptr, ptr, csize);
|
|
mpool_free(mp, ptr);
|
|
return new_ptr;
|
|
}
|
|
|
|
unsigned char *cli_mpool_hex2str(mpool_t *mp, const unsigned char *hex) {
|
|
unsigned char *str;
|
|
size_t len = strlen((const char*)hex);
|
|
|
|
if (len&1) {
|
|
cli_errmsg("cli_hex2str(): Malformed hexstring: %s (length: %u)\n", hex, (unsigned)len);
|
|
return NULL;
|
|
}
|
|
|
|
str = mpool_malloc(mp, (len/2) + 1);
|
|
if (cli_hex2str_to(hex, str, len) == -1) {
|
|
mpool_free(mp, str);
|
|
return NULL;
|
|
}
|
|
str[len/2] = '\0';
|
|
return str;
|
|
}
|
|
|
|
char *cli_mpool_strdup(mpool_t *mp, const char *s) {
|
|
char *alloc;
|
|
unsigned int strsz;
|
|
|
|
if(s == NULL) {
|
|
cli_errmsg("cli_mpool_strdup(): s == NULL. Please report to http://bugs.clamav.net\n");
|
|
return NULL;
|
|
}
|
|
|
|
strsz = strlen(s) + 1;
|
|
alloc = mpool_malloc(mp, strsz);
|
|
if(!alloc)
|
|
cli_errmsg("cli_mpool_strdup(): Can't allocate memory (%u bytes).\n", (unsigned int) strsz);
|
|
else
|
|
memcpy(alloc, s, strsz);
|
|
return alloc;
|
|
}
|
|
|
|
char *cli_mpool_virname(mpool_t *mp, const char *virname, unsigned int official) {
|
|
char *newname, *pt;
|
|
if(!virname)
|
|
return NULL;
|
|
|
|
if((pt = strchr(virname, ' ')))
|
|
if((pt = strstr(pt, " (Clam)")))
|
|
*pt='\0';
|
|
|
|
if(!virname[0]) {
|
|
cli_errmsg("cli_virname: Empty virus name\n");
|
|
return NULL;
|
|
}
|
|
|
|
if(official)
|
|
return cli_mpool_strdup(mp, virname);
|
|
|
|
newname = (char *)mpool_malloc(mp, strlen(virname) + 11 + 1);
|
|
if(!newname) {
|
|
cli_errmsg("cli_virname: Can't allocate memory for newname\n");
|
|
return NULL;
|
|
}
|
|
sprintf(newname, "%s.UNOFFICIAL", virname);
|
|
return newname;
|
|
}
|
|
|
|
|
|
uint16_t *cli_mpool_hex2ui(mpool_t *mp, const char *hex) {
|
|
uint16_t *str;
|
|
unsigned int len;
|
|
|
|
len = strlen(hex);
|
|
|
|
if(len % 2 != 0) {
|
|
cli_errmsg("cli_hex2si(): Malformed hexstring: %s (length: %u)\n", hex, len);
|
|
return NULL;
|
|
}
|
|
|
|
str = mpool_calloc(mp, (len / 2) + 1, sizeof(uint16_t));
|
|
if(!str)
|
|
return NULL;
|
|
|
|
if(cli_realhex2ui(hex, str, len))
|
|
return str;
|
|
|
|
mpool_free(mp, str);
|
|
return NULL;
|
|
}
|
|
|
|
|
|
#ifdef DEBUGMPOOL
|
|
void mpool_stats(struct MP *mp) {
|
|
unsigned int i=0, ta=0, tu=0;
|
|
struct MPMAP *mpm = &mp->mpm;
|
|
|
|
cli_warnmsg("MEMORY POOL STATISTICS\n map \tsize\tused\t%\n");
|
|
while(mpm) {
|
|
cli_warnmsg("- %u\t%u\t%u\t%f%%\n", i, mpm->size, mpm->usize, (float)mpm->usize/(float)mpm->size*100);
|
|
ta+=mpm->size;
|
|
tu+=mpm->usize;
|
|
i++;
|
|
mpm = mpm->next;
|
|
}
|
|
cli_warnmsg("MEMORY POOL SUMMARY\nMaps: %u\nTotal: %u\nUsed: %u (%f%%)\n", i, ta, tu, (float)tu/(float)ta*100);
|
|
}
|
|
|
|
void check_all(struct MP *mp) {
|
|
struct MPMAP *mpm = &mp->mpm;
|
|
while(mpm) {
|
|
volatile unsigned char *c = (unsigned char *)mpm;
|
|
unsigned int len = mpm->size;
|
|
spam("checking object %p - size %u\n", mpm, len);
|
|
while (len--) {
|
|
c[len];
|
|
}
|
|
mpm=mpm->next;
|
|
}
|
|
}
|
|
#endif /* DEBUGMPOOL */
|
|
|
|
|
|
#else
|
|
/* dummy definitions to make Solaris linker happy.
|
|
* these symbols are declared in libclamav.map */
|
|
void mpool_free() {}
|
|
void mpool_create() {}
|
|
void mpool_destroy() {}
|
|
void mpool_getstats() {}
|
|
|
|
#endif /* USE_MPOOL */
|
|
|
|
|