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ccc6cda3 JA |
1 | /* xmalloc.c -- safe versions of malloc and realloc */ |
2 | ||
a0c0a00f | 3 | /* Copyright (C) 1991-2016 Free Software Foundation, Inc. |
ccc6cda3 | 4 | |
3185942a | 5 | This file is part of GNU Bash, the GNU Bourne Again SHell. |
ccc6cda3 | 6 | |
3185942a JA |
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. | |
ccc6cda3 | 11 | |
3185942a JA |
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. | |
ccc6cda3 JA |
16 | |
17 | You should have received a copy of the GNU General Public License | |
3185942a JA |
18 | along with Bash. If not, see <http://www.gnu.org/licenses/>. |
19 | */ | |
ccc6cda3 JA |
20 | |
21 | #if defined (HAVE_CONFIG_H) | |
22 | #include <config.h> | |
23 | #endif | |
24 | ||
d166f048 | 25 | #include "bashtypes.h" |
ccc6cda3 JA |
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 | ||
b80f6443 JA |
40 | #include "bashintl.h" |
41 | ||
ccc6cda3 JA |
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 | ||
f73dda09 | 50 | #if defined (HAVE_SBRK) && !HAVE_DECL_SBRK |
ccc6cda3 JA |
51 | extern char *sbrk(); |
52 | #endif | |
53 | ||
d233b485 | 54 | #if defined (HAVE_SBRK) && defined (USING_BASH_MALLOC) |
ccc6cda3 JA |
55 | static PTR_T lbreak; |
56 | static int brkfound; | |
57 | static size_t allocated; | |
d233b485 | 58 | #endif |
ccc6cda3 JA |
59 | |
60 | /* **************************************************************** */ | |
61 | /* */ | |
62 | /* Memory Allocation and Deallocation. */ | |
63 | /* */ | |
64 | /* **************************************************************** */ | |
65 | ||
a0c0a00f | 66 | #if defined (HAVE_SBRK) && defined (USING_BASH_MALLOC) |
0001803f CR |
67 | #define FINDBRK() \ |
68 | do { \ | |
69 | if (brkfound == 0) \ | |
70 | { \ | |
71 | lbreak = (PTR_T)sbrk (0); \ | |
72 | brkfound++; \ | |
73 | } \ | |
74 | } while (0) | |
75 | ||
b72432fd JA |
76 | static size_t |
77 | findbrk () | |
78 | { | |
0001803f | 79 | FINDBRK(); |
b72432fd JA |
80 | return (char *)sbrk (0) - (char *)lbreak; |
81 | } | |
0001803f CR |
82 | #else |
83 | #define FINDBRK() | |
b72432fd JA |
84 | #endif |
85 | ||
0001803f CR |
86 | static void |
87 | allocerr (func, bytes) | |
88 | const char *func; | |
89 | size_t bytes; | |
90 | { | |
a0c0a00f | 91 | #if defined (HAVE_SBRK) && defined (USING_BASH_MALLOC) |
0001803f CR |
92 | allocated = findbrk (); |
93 | fatal_error (_("%s: cannot allocate %lu bytes (%lu bytes allocated)"), func, (unsigned long)bytes, (unsigned long)allocated); | |
94 | #else | |
95 | fatal_error (_("%s: cannot allocate %lu bytes"), func, (unsigned long)bytes); | |
96 | #endif /* !HAVE_SBRK */ | |
97 | } | |
98 | ||
ccc6cda3 JA |
99 | /* Return a pointer to free()able block of memory large enough |
100 | to hold BYTES number of bytes. If the memory cannot be allocated, | |
101 | print an error message and abort. */ | |
f73dda09 | 102 | PTR_T |
ccc6cda3 JA |
103 | xmalloc (bytes) |
104 | size_t bytes; | |
105 | { | |
f73dda09 | 106 | PTR_T temp; |
ccc6cda3 | 107 | |
0001803f CR |
108 | #if defined (DEBUG) |
109 | if (bytes == 0) | |
110 | internal_warning("xmalloc: size argument is 0"); | |
111 | #endif | |
112 | ||
113 | FINDBRK(); | |
f73dda09 | 114 | temp = malloc (bytes); |
ccc6cda3 JA |
115 | |
116 | if (temp == 0) | |
0001803f | 117 | allocerr ("xmalloc", bytes); |
ccc6cda3 JA |
118 | |
119 | return (temp); | |
120 | } | |
121 | ||
f73dda09 | 122 | PTR_T |
ccc6cda3 JA |
123 | xrealloc (pointer, bytes) |
124 | PTR_T pointer; | |
125 | size_t bytes; | |
126 | { | |
f73dda09 | 127 | PTR_T temp; |
ccc6cda3 | 128 | |
0001803f CR |
129 | #if defined (DEBUG) |
130 | if (bytes == 0) | |
131 | internal_warning("xrealloc: size argument is 0"); | |
132 | #endif | |
133 | ||
134 | FINDBRK(); | |
f73dda09 | 135 | temp = pointer ? realloc (pointer, bytes) : malloc (bytes); |
ccc6cda3 JA |
136 | |
137 | if (temp == 0) | |
0001803f | 138 | allocerr ("xrealloc", bytes); |
ccc6cda3 JA |
139 | |
140 | return (temp); | |
141 | } | |
142 | ||
143 | /* Use this as the function to call when adding unwind protects so we | |
144 | don't need to know what free() returns. */ | |
145 | void | |
146 | xfree (string) | |
bb70624e | 147 | PTR_T string; |
ccc6cda3 JA |
148 | { |
149 | if (string) | |
150 | free (string); | |
151 | } | |
f73dda09 JA |
152 | |
153 | #ifdef USING_BASH_MALLOC | |
154 | #include <malloc/shmalloc.h> | |
155 | ||
0001803f CR |
156 | static void |
157 | sh_allocerr (func, bytes, file, line) | |
158 | const char *func; | |
159 | size_t bytes; | |
160 | char *file; | |
161 | int line; | |
162 | { | |
163 | #if defined (HAVE_SBRK) | |
164 | allocated = findbrk (); | |
165 | fatal_error (_("%s: %s:%d: cannot allocate %lu bytes (%lu bytes allocated)"), func, file, line, (unsigned long)bytes, (unsigned long)allocated); | |
166 | #else | |
167 | fatal_error (_("%s: %s:%d: cannot allocate %lu bytes"), func, file, line, (unsigned long)bytes); | |
168 | #endif /* !HAVE_SBRK */ | |
169 | } | |
170 | ||
f73dda09 JA |
171 | PTR_T |
172 | sh_xmalloc (bytes, file, line) | |
173 | size_t bytes; | |
174 | char *file; | |
175 | int line; | |
176 | { | |
177 | PTR_T temp; | |
178 | ||
0001803f CR |
179 | #if defined (DEBUG) |
180 | if (bytes == 0) | |
181 | internal_warning("xmalloc: %s:%d: size argument is 0", file, line); | |
182 | #endif | |
183 | ||
184 | FINDBRK(); | |
f73dda09 JA |
185 | temp = sh_malloc (bytes, file, line); |
186 | ||
187 | if (temp == 0) | |
0001803f | 188 | sh_allocerr ("xmalloc", bytes, file, line); |
f73dda09 JA |
189 | |
190 | return (temp); | |
191 | } | |
192 | ||
193 | PTR_T | |
194 | sh_xrealloc (pointer, bytes, file, line) | |
195 | PTR_T pointer; | |
196 | size_t bytes; | |
197 | char *file; | |
198 | int line; | |
199 | { | |
200 | PTR_T temp; | |
201 | ||
0001803f CR |
202 | #if defined (DEBUG) |
203 | if (bytes == 0) | |
204 | internal_warning("xrealloc: %s:%d: size argument is 0", file, line); | |
205 | #endif | |
206 | ||
207 | FINDBRK(); | |
f73dda09 JA |
208 | temp = pointer ? sh_realloc (pointer, bytes, file, line) : sh_malloc (bytes, file, line); |
209 | ||
210 | if (temp == 0) | |
0001803f | 211 | sh_allocerr ("xrealloc", bytes, file, line); |
f73dda09 JA |
212 | |
213 | return (temp); | |
214 | } | |
215 | ||
216 | void | |
217 | sh_xfree (string, file, line) | |
218 | PTR_T string; | |
219 | char *file; | |
220 | int line; | |
221 | { | |
222 | if (string) | |
223 | sh_free (string, file, line); | |
224 | } | |
225 | #endif |