2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com).
7 * The implementation was written so as to conform with Netscapes SSL.
9 * This library is free for commercial and non-commercial use as long as
10 * the following conditions are aheared to. The following conditions
11 * apply to all code found in this distribution, be it the RC4, RSA,
12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13 * included with this distribution is covered by the same copyright terms
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
16 * Copyright remains Eric Young's, and as such any Copyright notices in
17 * the code are not to be removed.
18 * If this package is used in a product, Eric Young should be given attribution
19 * as the author of the parts of the library used.
20 * This can be in the form of a textual message at program startup or
21 * in documentation (online or textual) provided with the package.
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
26 * 1. Redistributions of source code must retain the copyright
27 * notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 * notice, this list of conditions and the following disclaimer in the
30 * documentation and/or other materials provided with the distribution.
31 * 3. All advertising materials mentioning features or use of this software
32 * must display the following acknowledgement:
33 * "This product includes cryptographic software written by
34 * Eric Young (eay@cryptsoft.com)"
35 * The word 'cryptographic' can be left out if the rouines from the library
36 * being used are not cryptographic related :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 * the apps directory (application code) you must include an acknowledgement:
39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
53 * The licence and distribution terms for any publically available version or
54 * derivative of this code cannot be changed. i.e. this code cannot simply be
55 * copied and put under another distribution licence
56 * [including the GNU Public Licence.]
61 #include <openssl/buffer.h>
62 #include <openssl/bio.h>
63 #include <openssl/lhash.h>
66 /* #ifdef CRYPTO_MDEBUG */
67 /* static int mh_mode=CRYPTO_MEM_CHECK_ON; */
69 static int mh_mode=CRYPTO_MEM_CHECK_OFF;
71 /* State CRYPTO_MEM_CHECK_ON exists only temporarily when the library
72 * thinks that certain allocations should not be checked (e.g. the data
73 * structures used for memory checking). It is not suitable as an initial
74 * state: the library will unexpectedly enable memory checking when it
75 * executes one of those sections that want to disable checking
78 * State CRYPTO_MEM_CHECK_ENABLE without ..._ON makes no sense whatsoever.
81 static unsigned long order=0;
83 static LHASH *mh=NULL;
94 int CRYPTO_mem_ctrl(int mode)
98 CRYPTO_w_lock(CRYPTO_LOCK_MALLOC);
101 /* for applications: */
102 case CRYPTO_MEM_CHECK_ON: /* aka MemCheck_start() */
103 mh_mode = CRYPTO_MEM_CHECK_ON|CRYPTO_MEM_CHECK_ENABLE;
105 case CRYPTO_MEM_CHECK_OFF: /* aka MemCheck_stop() */
109 /* switch off temporarily (for library-internal use): */
110 case CRYPTO_MEM_CHECK_DISABLE: /* aka MemCheck_off() */
111 mh_mode&= ~CRYPTO_MEM_CHECK_ENABLE;
113 case CRYPTO_MEM_CHECK_ENABLE: /* aka MemCheck_on() */
114 if (mh_mode&CRYPTO_MEM_CHECK_ON)
115 mh_mode|=CRYPTO_MEM_CHECK_ENABLE;
121 CRYPTO_w_unlock(CRYPTO_LOCK_MALLOC);
125 static int mem_cmp(MEM *a, MEM *b)
127 return(a->addr - b->addr);
130 static unsigned long mem_hash(MEM *a)
134 ret=(unsigned long)a->addr;
136 ret=ret*17851+(ret>>14)*7+(ret>>4)*251;
140 static char *(*malloc_locked_func)()=(char *(*)())malloc;
141 static void (*free_locked_func)()=(void (*)())free;
142 static char *(*malloc_func)()= (char *(*)())malloc;
143 static char *(*realloc_func)()= (char *(*)())realloc;
144 static void (*free_func)()= (void (*)())free;
146 void CRYPTO_set_mem_functions(char *(*m)(), char *(*r)(), void (*f)())
148 if ((m == NULL) || (r == NULL) || (f == NULL)) return;
152 malloc_locked_func=m;
156 void CRYPTO_set_locked_mem_functions(char *(*m)(), void (*f)())
158 if ((m == NULL) || (f == NULL)) return;
159 malloc_locked_func=m;
163 void CRYPTO_get_mem_functions(char *(**m)(), char *(**r)(), void (**f)())
165 if (m != NULL) *m=malloc_func;
166 if (r != NULL) *r=realloc_func;
167 if (f != NULL) *f=free_func;
170 void CRYPTO_get_locked_mem_functions(char *(**m)(), void (**f)())
172 if (m != NULL) *m=malloc_locked_func;
173 if (f != NULL) *f=free_locked_func;
176 void *CRYPTO_malloc_locked(int num)
178 return(malloc_locked_func(num));
181 void CRYPTO_free_locked(void *str)
183 free_locked_func(str);
186 void *CRYPTO_malloc(int num)
188 return(malloc_func(num));
191 void *CRYPTO_realloc(void *str, int num)
193 return(realloc_func(str,num));
196 void CRYPTO_free(void *str)
201 static unsigned long break_order_num=0;
202 void *CRYPTO_dbg_malloc(int num, const char *file, int line)
207 if ((ret=malloc_func(num)) == NULL)
210 if (mh_mode & CRYPTO_MEM_CHECK_ENABLE)
213 if ((m=(MEM *)Malloc(sizeof(MEM))) == NULL)
219 CRYPTO_w_lock(CRYPTO_LOCK_MALLOC);
222 if ((mh=lh_new(mem_hash,mem_cmp)) == NULL)
235 if (order == break_order_num)
241 if ((mm=(MEM *)lh_insert(mh,(char *)m)) != NULL)
243 /* Not good, but don't sweat it */
247 CRYPTO_w_unlock(CRYPTO_LOCK_MALLOC);
253 void CRYPTO_dbg_free(void *addr)
257 if ((mh_mode & CRYPTO_MEM_CHECK_ENABLE) && (mh != NULL))
260 CRYPTO_w_lock(CRYPTO_LOCK_MALLOC);
262 mp=(MEM *)lh_delete(mh,(char *)&m);
265 CRYPTO_w_unlock(CRYPTO_LOCK_MALLOC);
271 void *CRYPTO_dbg_realloc(void *addr, int num, const char *file, int line)
276 ret=realloc_func(addr,num);
277 if (ret == addr) return(ret);
279 if (mh_mode & CRYPTO_MEM_CHECK_ENABLE)
282 if (ret == NULL) return(NULL);
284 CRYPTO_w_lock(CRYPTO_LOCK_MALLOC);
285 mp=(MEM *)lh_delete(mh,(char *)&m);
289 lh_insert(mh,(char *)mp);
291 CRYPTO_w_unlock(CRYPTO_LOCK_MALLOC);
297 void *CRYPTO_remalloc(void *a, int n)
299 if (a != NULL) Free(a);
304 void *CRYPTO_dbg_remalloc(void *a, int n, const char *file, int line)
306 if (a != NULL) CRYPTO_dbg_free(a);
307 a=(char *)CRYPTO_dbg_malloc(n,file,line);
312 typedef struct mem_leak_st
319 static void print_leak(MEM *m, MEM_LEAK *l)
323 if(m->addr == (char *)l->bio)
325 sprintf(buf,"%5lu file=%s, line=%d, number=%d, address=%08lX\n",
326 m->order,m->file,m->line,m->num,(unsigned long)m->addr);
327 BIO_puts(l->bio,buf);
332 void CRYPTO_mem_leaks(BIO *b)
337 if (mh == NULL) return;
341 CRYPTO_w_lock(CRYPTO_LOCK_MALLOC);
342 lh_doall_arg(mh,(void (*)())print_leak,(char *)&ml);
343 CRYPTO_w_unlock(CRYPTO_LOCK_MALLOC);
346 sprintf(buf,"%ld bytes leaked in %d chunks\n",
353 lh_node_stats_bio(mh,b);
354 lh_node_usage_stats_bio(mh,b);
358 static void (*mem_cb)()=NULL;
360 static void cb_leak(MEM *m, char *cb)
362 void (*mem_callback)()=(void (*)())cb;
363 mem_callback(m->order,m->file,m->line,m->num,m->addr);
366 void CRYPTO_mem_leaks_cb(void (*cb)())
368 if (mh == NULL) return;
369 CRYPTO_w_lock(CRYPTO_LOCK_MALLOC);
371 lh_doall_arg(mh,(void (*)())cb_leak,(char *)mem_cb);
373 CRYPTO_w_unlock(CRYPTO_LOCK_MALLOC);
377 void CRYPTO_mem_leaks_fp(FILE *fp)
381 if (mh == NULL) return;
382 if ((b=BIO_new(BIO_s_file())) == NULL)
384 BIO_set_fp(b,fp,BIO_NOCLOSE);