source: trunk/cscrypt/mem.c@ 3181

Last change on this file since 3181 was 3181, checked in by dingo35, 10 years ago

Adding threadsafety FIXMEs, feel free to join checking..

File size: 8.8 KB
Line 
1//FIXME Not checked on threadsafety yet; after checking please remove this line
2/* crypto/mem.c */
3/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
4 * All rights reserved.
5 *
6 * This package is an SSL implementation written
7 * by Eric Young (eay@cryptsoft.com).
8 * The implementation was written so as to conform with Netscapes SSL.
9 *
10 * This library is free for commercial and non-commercial use as long as
11 * the following conditions are aheared to. The following conditions
12 * apply to all code found in this distribution, be it the RC4, RSA,
13 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
14 * included with this distribution is covered by the same copyright terms
15 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
16 *
17 * Copyright remains Eric Young's, and as such any Copyright notices in
18 * the code are not to be removed.
19 * If this package is used in a product, Eric Young should be given attribution
20 * as the author of the parts of the library used.
21 * This can be in the form of a textual message at program startup or
22 * in documentation (online or textual) provided with the package.
23 *
24 * Redistribution and use in source and binary forms, with or without
25 * modification, are permitted provided that the following conditions
26 * are met:
27 * 1. Redistributions of source code must retain the copyright
28 * notice, this list of conditions and the following disclaimer.
29 * 2. Redistributions in binary form must reproduce the above copyright
30 * notice, this list of conditions and the following disclaimer in the
31 * documentation and/or other materials provided with the distribution.
32 * 3. All advertising materials mentioning features or use of this software
33 * must display the following acknowledgement:
34 * "This product includes cryptographic software written by
35 * Eric Young (eay@cryptsoft.com)"
36 * The word 'cryptographic' can be left out if the rouines from the library
37 * being used are not cryptographic related :-).
38 * 4. If you include any Windows specific code (or a derivative thereof) from
39 * the apps directory (application code) you must include an acknowledgement:
40 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
41 *
42 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
43 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
44 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
45 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
46 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
47 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
48 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
49 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
50 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
51 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
52 * SUCH DAMAGE.
53 *
54 * The licence and distribution terms for any publically available version or
55 * derivative of this code cannot be changed. i.e. this code cannot simply be
56 * copied and put under another distribution licence
57 * [including the GNU Public Licence.]
58 */
59
60#include <stdio.h>
61#include <stdlib.h>
62#include "openssl_mods.h"
63
64
65static int allow_customize = 1; /* we provide flexible functions for */
66static int allow_customize_debug = 1;/* exchanging memory-related functions at
67 * run-time, but this must be done
68 * before any blocks are actually
69 * allocated; or we'll run into huge
70 * problems when malloc/free pairs
71 * don't match etc. */
72
73/* may be changed as long as `allow_customize' is set */
74static void *(*malloc_locked_func)(size_t) = malloc;
75static void (*free_locked_func)(void *) = free;
76static void *(*malloc_func)(size_t) = malloc;
77static void *(*realloc_func)(void *, size_t)= realloc;
78static void (*free_func)(void *) = free;
79
80/* may be changed as long as `allow_customize_debug' is set */
81/* XXX use correct function pointer types */
82#ifdef CRYPTO_MDEBUG
83/* use default functions from mem_dbg.c */
84static void (*malloc_debug_func)(void *,int,const char *,int,int)
85 = CRYPTO_dbg_malloc;
86static void (*realloc_debug_func)(void *,void *,int,const char *,int,int)
87 = CRYPTO_dbg_realloc;
88static void (*free_debug_func)(void *,int) = CRYPTO_dbg_free;
89static void (*set_debug_options_func)(long) = CRYPTO_dbg_set_options;
90static long (*get_debug_options_func)(void) = CRYPTO_dbg_get_options;
91#else
92/* applications can use CRYPTO_malloc_debug_init() to select above case
93 * at run-time */
94static void (*malloc_debug_func)(void *,int,const char *,int,int) = NULL;
95static void (*realloc_debug_func)(void *,void *,int,const char *,int,int)
96 = NULL;
97static void (*free_debug_func)(void *,int) = NULL;
98static void (*set_debug_options_func)(long) = NULL;
99static long (*get_debug_options_func)(void) = NULL;
100#endif
101
102
103int CRYPTO_set_mem_functions(void *(*m)(size_t), void *(*r)(void *, size_t),
104 void (*f)(void *))
105 {
106 if (!allow_customize)
107 return 0;
108 if ((m == NULL) || (r == NULL) || (f == NULL))
109 return 0;
110 malloc_func=m;
111 realloc_func=r;
112 free_func=f;
113 malloc_locked_func=m;
114 free_locked_func=f;
115 return 1;
116 }
117
118int CRYPTO_set_locked_mem_functions(void *(*m)(size_t), void (*f)(void *))
119 {
120 if (!allow_customize)
121 return 0;
122 if ((m == NULL) || (f == NULL))
123 return 0;
124 malloc_locked_func=m;
125 free_locked_func=f;
126 return 1;
127 }
128
129int CRYPTO_set_mem_debug_functions(void (*m)(void *,int,const char *,int,int),
130 void (*r)(void *,void *,int,const char *,int,int),
131 void (*f)(void *,int),
132 void (*so)(long),
133 long (*go)(void))
134 {
135 if (!allow_customize_debug)
136 return 0;
137 malloc_debug_func=m;
138 realloc_debug_func=r;
139 free_debug_func=f;
140 set_debug_options_func=so;
141 get_debug_options_func=go;
142 return 1;
143 }
144
145void CRYPTO_get_mem_functions(void *(**m)(size_t), void *(**r)(void *, size_t),
146 void (**f)(void *))
147 {
148 if (m != NULL) *m=malloc_func;
149 if (r != NULL) *r=realloc_func;
150 if (f != NULL) *f=free_func;
151 }
152
153void CRYPTO_get_locked_mem_functions(void *(**m)(size_t), void (**f)(void *))
154 {
155 if (m != NULL) *m=malloc_locked_func;
156 if (f != NULL) *f=free_locked_func;
157 }
158
159void CRYPTO_get_mem_debug_functions(void (**m)(void *,int,const char *,int,int),
160 void (**r)(void *,void *,int,const char *,int,int),
161 void (**f)(void *,int),
162 void (**so)(long),
163 long (**go)(void))
164 {
165 if (m != NULL) *m=malloc_debug_func;
166 if (r != NULL) *r=realloc_debug_func;
167 if (f != NULL) *f=free_debug_func;
168 if (so != NULL) *so=set_debug_options_func;
169 if (go != NULL) *go=get_debug_options_func;
170 }
171
172
173void *CRYPTO_malloc_locked(int num, const char *file, int line)
174 {
175 void *ret = NULL;
176
177 allow_customize = 0;
178 if (malloc_debug_func != NULL)
179 {
180 allow_customize_debug = 0;
181 malloc_debug_func(NULL, num, file, line, 0);
182 }
183 ret = malloc_locked_func(num);
184#ifdef LEVITTE_DEBUG
185 fprintf(stderr, "LEVITTE_DEBUG: > 0x%p (%d)\n", ret, num);
186#endif
187 if (malloc_debug_func != NULL)
188 malloc_debug_func(ret, num, file, line, 1);
189
190 return ret;
191 }
192
193void CRYPTO_free_locked(void *str)
194 {
195 if (free_debug_func != NULL)
196 free_debug_func(str, 0);
197#ifdef LEVITTE_DEBUG
198 fprintf(stderr, "LEVITTE_DEBUG: < 0x%p\n", str);
199#endif
200 free_locked_func(str);
201 if (free_debug_func != NULL)
202 free_debug_func(NULL, 1);
203 }
204
205void *CRYPTO_malloc(int num, const char *file, int line)
206 {
207 void *ret = NULL;
208
209 allow_customize = 0;
210 if (malloc_debug_func != NULL)
211 {
212 allow_customize_debug = 0;
213 malloc_debug_func(NULL, num, file, line, 0);
214 }
215 ret = malloc_func(num);
216#ifdef LEVITTE_DEBUG
217 fprintf(stderr, "LEVITTE_DEBUG: > 0x%p (%d)\n", ret, num);
218#endif
219 if (malloc_debug_func != NULL)
220 malloc_debug_func(ret, num, file, line, 1);
221
222 return ret;
223 }
224
225void *CRYPTO_realloc(void *str, int num, const char *file, int line)
226 {
227 void *ret = NULL;
228
229 if (realloc_debug_func != NULL)
230 realloc_debug_func(str, NULL, num, file, line, 0);
231 ret = realloc_func(str,num);
232#ifdef LEVITTE_DEBUG
233 fprintf(stderr, "LEVITTE_DEBUG: | 0x%p -> 0x%p (%d)\n", str, ret, num);
234#endif
235 if (realloc_debug_func != NULL)
236 realloc_debug_func(str, ret, num, file, line, 1);
237
238 return ret;
239 }
240
241void CRYPTO_free(void *str)
242 {
243 if (free_debug_func != NULL)
244 free_debug_func(str, 0);
245#ifdef LEVITTE_DEBUG
246 fprintf(stderr, "LEVITTE_DEBUG: < 0x%p\n", str);
247#endif
248 free_func(str);
249 if (free_debug_func != NULL)
250 free_debug_func(NULL, 1);
251 }
252
253void *CRYPTO_remalloc(void *a, int num)
254 {
255 if (a != NULL) OPENSSL_free(a);
256 a=(char *)OPENSSL_malloc(num);
257 return(a);
258 }
259
260
261void CRYPTO_set_mem_debug_options(long bits)
262 {
263 if (set_debug_options_func != NULL)
264 set_debug_options_func(bits);
265 }
266
267long CRYPTO_get_mem_debug_options(void)
268 {
269 if (get_debug_options_func != NULL)
270 return get_debug_options_func();
271 return 0;
272 }
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