Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 1 | /* xmalloc.c -- safe versions of malloc and realloc */ |
| 2 | |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 3 | /* Copyright (C) 1991-2009 Free Software Foundation, Inc. |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 4 | |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 5 | This file is part of GNU Bash, the GNU Bourne Again SHell. |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 6 | |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 7 | Bash is free software: you can redistribute it and/or modify |
| 8 | it under the terms of the GNU General Public License as published by |
| 9 | the Free Software Foundation, either version 3 of the License, or |
| 10 | (at your option) any later version. |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 11 | |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 12 | Bash is distributed in the hope that it will be useful, |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | GNU General Public License for more details. |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 16 | |
| 17 | You should have received a copy of the GNU General Public License |
Jari Aalto | 3185942 | 2009-01-12 13:36:28 +0000 | [diff] [blame] | 18 | along with Bash. If not, see <http://www.gnu.org/licenses/>. |
| 19 | */ |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 20 | |
| 21 | #if defined (HAVE_CONFIG_H) |
| 22 | #include <config.h> |
| 23 | #endif |
| 24 | |
Jari Aalto | d166f04 | 1997-06-05 14:59:13 +0000 | [diff] [blame] | 25 | #include "bashtypes.h" |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 26 | #include <stdio.h> |
| 27 | |
| 28 | #if defined (HAVE_UNISTD_H) |
| 29 | # include <unistd.h> |
| 30 | #endif |
| 31 | |
| 32 | #if defined (HAVE_STDLIB_H) |
| 33 | # include <stdlib.h> |
| 34 | #else |
| 35 | # include "ansi_stdlib.h" |
| 36 | #endif /* HAVE_STDLIB_H */ |
| 37 | |
| 38 | #include "error.h" |
| 39 | |
Jari Aalto | b80f644 | 2004-07-27 13:29:18 +0000 | [diff] [blame] | 40 | #include "bashintl.h" |
| 41 | |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 42 | #if !defined (PTR_T) |
| 43 | # if defined (__STDC__) |
| 44 | # define PTR_T void * |
| 45 | # else |
| 46 | # define PTR_T char * |
| 47 | # endif /* !__STDC__ */ |
| 48 | #endif /* !PTR_T */ |
| 49 | |
Jari Aalto | f73dda0 | 2001-11-13 17:56:06 +0000 | [diff] [blame] | 50 | #if defined (HAVE_SBRK) && !HAVE_DECL_SBRK |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 51 | extern char *sbrk(); |
| 52 | #endif |
| 53 | |
| 54 | static PTR_T lbreak; |
| 55 | static int brkfound; |
| 56 | static size_t allocated; |
| 57 | |
| 58 | /* **************************************************************** */ |
| 59 | /* */ |
| 60 | /* Memory Allocation and Deallocation. */ |
| 61 | /* */ |
| 62 | /* **************************************************************** */ |
| 63 | |
Jari Aalto | b72432f | 1999-02-19 17:11:39 +0000 | [diff] [blame] | 64 | #if defined (HAVE_SBRK) |
Chet Ramey | 0001803 | 2011-11-21 20:51:19 -0500 | [diff] [blame] | 65 | #define FINDBRK() \ |
| 66 | do { \ |
| 67 | if (brkfound == 0) \ |
| 68 | { \ |
| 69 | lbreak = (PTR_T)sbrk (0); \ |
| 70 | brkfound++; \ |
| 71 | } \ |
| 72 | } while (0) |
| 73 | |
Jari Aalto | b72432f | 1999-02-19 17:11:39 +0000 | [diff] [blame] | 74 | static size_t |
| 75 | findbrk () |
| 76 | { |
Chet Ramey | 0001803 | 2011-11-21 20:51:19 -0500 | [diff] [blame] | 77 | FINDBRK(); |
Jari Aalto | b72432f | 1999-02-19 17:11:39 +0000 | [diff] [blame] | 78 | return (char *)sbrk (0) - (char *)lbreak; |
| 79 | } |
Chet Ramey | 0001803 | 2011-11-21 20:51:19 -0500 | [diff] [blame] | 80 | #else |
| 81 | #define FINDBRK() |
Jari Aalto | b72432f | 1999-02-19 17:11:39 +0000 | [diff] [blame] | 82 | #endif |
| 83 | |
Chet Ramey | 0001803 | 2011-11-21 20:51:19 -0500 | [diff] [blame] | 84 | static void |
| 85 | allocerr (func, bytes) |
| 86 | const char *func; |
| 87 | size_t bytes; |
| 88 | { |
| 89 | #if defined (HAVE_SBRK) |
| 90 | allocated = findbrk (); |
| 91 | fatal_error (_("%s: cannot allocate %lu bytes (%lu bytes allocated)"), func, (unsigned long)bytes, (unsigned long)allocated); |
| 92 | #else |
| 93 | fatal_error (_("%s: cannot allocate %lu bytes"), func, (unsigned long)bytes); |
| 94 | #endif /* !HAVE_SBRK */ |
| 95 | } |
| 96 | |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 97 | /* Return a pointer to free()able block of memory large enough |
| 98 | to hold BYTES number of bytes. If the memory cannot be allocated, |
| 99 | print an error message and abort. */ |
Jari Aalto | f73dda0 | 2001-11-13 17:56:06 +0000 | [diff] [blame] | 100 | PTR_T |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 101 | xmalloc (bytes) |
| 102 | size_t bytes; |
| 103 | { |
Jari Aalto | f73dda0 | 2001-11-13 17:56:06 +0000 | [diff] [blame] | 104 | PTR_T temp; |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 105 | |
Chet Ramey | 0001803 | 2011-11-21 20:51:19 -0500 | [diff] [blame] | 106 | #if defined (DEBUG) |
| 107 | if (bytes == 0) |
| 108 | internal_warning("xmalloc: size argument is 0"); |
| 109 | #endif |
| 110 | |
| 111 | FINDBRK(); |
Jari Aalto | f73dda0 | 2001-11-13 17:56:06 +0000 | [diff] [blame] | 112 | temp = malloc (bytes); |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 113 | |
| 114 | if (temp == 0) |
Chet Ramey | 0001803 | 2011-11-21 20:51:19 -0500 | [diff] [blame] | 115 | allocerr ("xmalloc", bytes); |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 116 | |
| 117 | return (temp); |
| 118 | } |
| 119 | |
Jari Aalto | f73dda0 | 2001-11-13 17:56:06 +0000 | [diff] [blame] | 120 | PTR_T |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 121 | xrealloc (pointer, bytes) |
| 122 | PTR_T pointer; |
| 123 | size_t bytes; |
| 124 | { |
Jari Aalto | f73dda0 | 2001-11-13 17:56:06 +0000 | [diff] [blame] | 125 | PTR_T temp; |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 126 | |
Chet Ramey | 0001803 | 2011-11-21 20:51:19 -0500 | [diff] [blame] | 127 | #if defined (DEBUG) |
| 128 | if (bytes == 0) |
| 129 | internal_warning("xrealloc: size argument is 0"); |
| 130 | #endif |
| 131 | |
| 132 | FINDBRK(); |
Jari Aalto | f73dda0 | 2001-11-13 17:56:06 +0000 | [diff] [blame] | 133 | temp = pointer ? realloc (pointer, bytes) : malloc (bytes); |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 134 | |
| 135 | if (temp == 0) |
Chet Ramey | 0001803 | 2011-11-21 20:51:19 -0500 | [diff] [blame] | 136 | allocerr ("xrealloc", bytes); |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 137 | |
| 138 | return (temp); |
| 139 | } |
| 140 | |
| 141 | /* Use this as the function to call when adding unwind protects so we |
| 142 | don't need to know what free() returns. */ |
| 143 | void |
| 144 | xfree (string) |
Jari Aalto | bb70624 | 2000-03-17 21:46:59 +0000 | [diff] [blame] | 145 | PTR_T string; |
Jari Aalto | ccc6cda | 1996-12-23 17:02:34 +0000 | [diff] [blame] | 146 | { |
| 147 | if (string) |
| 148 | free (string); |
| 149 | } |
Jari Aalto | f73dda0 | 2001-11-13 17:56:06 +0000 | [diff] [blame] | 150 | |
| 151 | #ifdef USING_BASH_MALLOC |
| 152 | #include <malloc/shmalloc.h> |
| 153 | |
Chet Ramey | 0001803 | 2011-11-21 20:51:19 -0500 | [diff] [blame] | 154 | static void |
| 155 | sh_allocerr (func, bytes, file, line) |
| 156 | const char *func; |
| 157 | size_t bytes; |
| 158 | char *file; |
| 159 | int line; |
| 160 | { |
| 161 | #if defined (HAVE_SBRK) |
| 162 | allocated = findbrk (); |
| 163 | fatal_error (_("%s: %s:%d: cannot allocate %lu bytes (%lu bytes allocated)"), func, file, line, (unsigned long)bytes, (unsigned long)allocated); |
| 164 | #else |
| 165 | fatal_error (_("%s: %s:%d: cannot allocate %lu bytes"), func, file, line, (unsigned long)bytes); |
| 166 | #endif /* !HAVE_SBRK */ |
| 167 | } |
| 168 | |
Jari Aalto | f73dda0 | 2001-11-13 17:56:06 +0000 | [diff] [blame] | 169 | PTR_T |
| 170 | sh_xmalloc (bytes, file, line) |
| 171 | size_t bytes; |
| 172 | char *file; |
| 173 | int line; |
| 174 | { |
| 175 | PTR_T temp; |
| 176 | |
Chet Ramey | 0001803 | 2011-11-21 20:51:19 -0500 | [diff] [blame] | 177 | #if defined (DEBUG) |
| 178 | if (bytes == 0) |
| 179 | internal_warning("xmalloc: %s:%d: size argument is 0", file, line); |
| 180 | #endif |
| 181 | |
| 182 | FINDBRK(); |
Jari Aalto | f73dda0 | 2001-11-13 17:56:06 +0000 | [diff] [blame] | 183 | temp = sh_malloc (bytes, file, line); |
| 184 | |
| 185 | if (temp == 0) |
Chet Ramey | 0001803 | 2011-11-21 20:51:19 -0500 | [diff] [blame] | 186 | sh_allocerr ("xmalloc", bytes, file, line); |
Jari Aalto | f73dda0 | 2001-11-13 17:56:06 +0000 | [diff] [blame] | 187 | |
| 188 | return (temp); |
| 189 | } |
| 190 | |
| 191 | PTR_T |
| 192 | sh_xrealloc (pointer, bytes, file, line) |
| 193 | PTR_T pointer; |
| 194 | size_t bytes; |
| 195 | char *file; |
| 196 | int line; |
| 197 | { |
| 198 | PTR_T temp; |
| 199 | |
Chet Ramey | 0001803 | 2011-11-21 20:51:19 -0500 | [diff] [blame] | 200 | #if defined (DEBUG) |
| 201 | if (bytes == 0) |
| 202 | internal_warning("xrealloc: %s:%d: size argument is 0", file, line); |
| 203 | #endif |
| 204 | |
| 205 | FINDBRK(); |
Jari Aalto | f73dda0 | 2001-11-13 17:56:06 +0000 | [diff] [blame] | 206 | temp = pointer ? sh_realloc (pointer, bytes, file, line) : sh_malloc (bytes, file, line); |
| 207 | |
| 208 | if (temp == 0) |
Chet Ramey | 0001803 | 2011-11-21 20:51:19 -0500 | [diff] [blame] | 209 | sh_allocerr ("xrealloc", bytes, file, line); |
Jari Aalto | f73dda0 | 2001-11-13 17:56:06 +0000 | [diff] [blame] | 210 | |
| 211 | return (temp); |
| 212 | } |
| 213 | |
| 214 | void |
| 215 | sh_xfree (string, file, line) |
| 216 | PTR_T string; |
| 217 | char *file; |
| 218 | int line; |
| 219 | { |
| 220 | if (string) |
| 221 | sh_free (string, file, line); |
| 222 | } |
| 223 | #endif |