Line data Source code
1 : /* crypto/mem_dbg.c */
2 : /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3 : * All rights reserved.
4 : *
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.
8 : *
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).
15 : *
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.
22 : *
23 : * Redistribution and use in source and binary forms, with or without
24 : * modification, are permitted provided that the following conditions
25 : * are met:
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)"
40 : *
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
51 : * SUCH DAMAGE.
52 : *
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.]
57 : */
58 : /* ====================================================================
59 : * Copyright (c) 1998-2006 The OpenSSL Project. All rights reserved.
60 : *
61 : * Redistribution and use in source and binary forms, with or without
62 : * modification, are permitted provided that the following conditions
63 : * are met:
64 : *
65 : * 1. Redistributions of source code must retain the above copyright
66 : * notice, this list of conditions and the following disclaimer.
67 : *
68 : * 2. Redistributions in binary form must reproduce the above copyright
69 : * notice, this list of conditions and the following disclaimer in
70 : * the documentation and/or other materials provided with the
71 : * distribution.
72 : *
73 : * 3. All advertising materials mentioning features or use of this
74 : * software must display the following acknowledgment:
75 : * "This product includes software developed by the OpenSSL Project
76 : * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
77 : *
78 : * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
79 : * endorse or promote products derived from this software without
80 : * prior written permission. For written permission, please contact
81 : * openssl-core@openssl.org.
82 : *
83 : * 5. Products derived from this software may not be called "OpenSSL"
84 : * nor may "OpenSSL" appear in their names without prior written
85 : * permission of the OpenSSL Project.
86 : *
87 : * 6. Redistributions of any form whatsoever must retain the following
88 : * acknowledgment:
89 : * "This product includes software developed by the OpenSSL Project
90 : * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
91 : *
92 : * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
93 : * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
94 : * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
95 : * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
96 : * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
97 : * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
98 : * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
99 : * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
100 : * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
101 : * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
102 : * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
103 : * OF THE POSSIBILITY OF SUCH DAMAGE.
104 : * ====================================================================
105 : *
106 : * This product includes cryptographic software written by Eric Young
107 : * (eay@cryptsoft.com). This product includes software written by Tim
108 : * Hudson (tjh@cryptsoft.com).
109 : *
110 : */
111 :
112 : #include <stdio.h>
113 : #include <stdlib.h>
114 : #include <time.h>
115 : #include "cryptlib.h"
116 : #include <openssl/crypto.h>
117 : #include <openssl/buffer.h>
118 : #include <openssl/bio.h>
119 : #include <openssl/lhash.h>
120 :
121 : static int mh_mode = CRYPTO_MEM_CHECK_OFF;
122 : /*
123 : * The state changes to CRYPTO_MEM_CHECK_ON | CRYPTO_MEM_CHECK_ENABLE when
124 : * the application asks for it (usually after library initialisation for
125 : * which no book-keeping is desired). State CRYPTO_MEM_CHECK_ON exists only
126 : * temporarily when the library thinks that certain allocations should not be
127 : * checked (e.g. the data structures used for memory checking). It is not
128 : * suitable as an initial state: the library will unexpectedly enable memory
129 : * checking when it executes one of those sections that want to disable
130 : * checking temporarily. State CRYPTO_MEM_CHECK_ENABLE without ..._ON makes
131 : * no sense whatsoever.
132 : */
133 :
134 : static unsigned long order = 0; /* number of memory requests */
135 :
136 : DECLARE_LHASH_OF(MEM);
137 : static LHASH_OF(MEM) *mh = NULL; /* hash-table of memory requests (address as
138 : * key); access requires MALLOC2 lock */
139 :
140 : typedef struct app_mem_info_st
141 : /*-
142 : * For application-defined information (static C-string `info')
143 : * to be displayed in memory leak list.
144 : * Each thread has its own stack. For applications, there is
145 : * CRYPTO_push_info("...") to push an entry,
146 : * CRYPTO_pop_info() to pop an entry,
147 : * CRYPTO_remove_all_info() to pop all entries.
148 : */
149 : {
150 : CRYPTO_THREADID threadid;
151 : const char *file;
152 : int line;
153 : const char *info;
154 : struct app_mem_info_st *next; /* tail of thread's stack */
155 : int references;
156 : } APP_INFO;
157 :
158 : static void app_info_free(APP_INFO *);
159 :
160 : DECLARE_LHASH_OF(APP_INFO);
161 : static LHASH_OF(APP_INFO) *amih = NULL; /* hash-table with those
162 : * app_mem_info_st's that are at the
163 : * top of their thread's stack (with
164 : * `thread' as key); access requires
165 : * MALLOC2 lock */
166 :
167 : typedef struct mem_st
168 : /* memory-block description */
169 : {
170 : void *addr;
171 : int num;
172 : const char *file;
173 : int line;
174 : CRYPTO_THREADID threadid;
175 : unsigned long order;
176 : time_t time;
177 : APP_INFO *app_info;
178 : } MEM;
179 :
180 : static long options = /* extra information to be recorded */
181 : #if defined(CRYPTO_MDEBUG_TIME) || defined(CRYPTO_MDEBUG_ALL)
182 : V_CRYPTO_MDEBUG_TIME |
183 : #endif
184 : #if defined(CRYPTO_MDEBUG_THREAD) || defined(CRYPTO_MDEBUG_ALL)
185 : V_CRYPTO_MDEBUG_THREAD |
186 : #endif
187 : 0;
188 :
189 : static unsigned int num_disable = 0; /* num_disable > 0 iff mh_mode ==
190 : * CRYPTO_MEM_CHECK_ON (w/o ..._ENABLE) */
191 :
192 : /*
193 : * Valid iff num_disable > 0. CRYPTO_LOCK_MALLOC2 is locked exactly in this
194 : * case (by the thread named in disabling_thread).
195 : */
196 : static CRYPTO_THREADID disabling_threadid;
197 :
198 0 : static void app_info_free(APP_INFO *inf)
199 : {
200 0 : if (--(inf->references) <= 0) {
201 0 : if (inf->next != NULL) {
202 0 : app_info_free(inf->next);
203 : }
204 0 : OPENSSL_free(inf);
205 : }
206 0 : }
207 :
208 484 : int CRYPTO_mem_ctrl(int mode)
209 : {
210 484 : int ret = mh_mode;
211 :
212 484 : CRYPTO_w_lock(CRYPTO_LOCK_MALLOC);
213 484 : switch (mode) {
214 : /*
215 : * for applications (not to be called while multiple threads use the
216 : * library):
217 : */
218 : case CRYPTO_MEM_CHECK_ON: /* aka MemCheck_start() */
219 0 : mh_mode = CRYPTO_MEM_CHECK_ON | CRYPTO_MEM_CHECK_ENABLE;
220 0 : num_disable = 0;
221 0 : break;
222 : case CRYPTO_MEM_CHECK_OFF: /* aka MemCheck_stop() */
223 0 : mh_mode = 0;
224 0 : num_disable = 0; /* should be true *before* MemCheck_stop is
225 : * used, or there'll be a lot of confusion */
226 0 : break;
227 :
228 : /* switch off temporarily (for library-internal use): */
229 : case CRYPTO_MEM_CHECK_DISABLE: /* aka MemCheck_off() */
230 242 : if (mh_mode & CRYPTO_MEM_CHECK_ON) {
231 : CRYPTO_THREADID cur;
232 0 : CRYPTO_THREADID_current(&cur);
233 : /* see if we don't have the MALLOC2 lock already */
234 0 : if (!num_disable
235 0 : || CRYPTO_THREADID_cmp(&disabling_threadid, &cur)) {
236 : /*
237 : * Long-time lock CRYPTO_LOCK_MALLOC2 must not be claimed
238 : * while we're holding CRYPTO_LOCK_MALLOC, or we'll deadlock
239 : * if somebody else holds CRYPTO_LOCK_MALLOC2 (and cannot
240 : * release it because we block entry to this function). Give
241 : * them a chance, first, and then claim the locks in
242 : * appropriate order (long-time lock first).
243 : */
244 0 : CRYPTO_w_unlock(CRYPTO_LOCK_MALLOC);
245 : /*
246 : * Note that after we have waited for CRYPTO_LOCK_MALLOC2 and
247 : * CRYPTO_LOCK_MALLOC, we'll still be in the right "case" and
248 : * "if" branch because MemCheck_start and MemCheck_stop may
249 : * never be used while there are multiple OpenSSL threads.
250 : */
251 0 : CRYPTO_w_lock(CRYPTO_LOCK_MALLOC2);
252 0 : CRYPTO_w_lock(CRYPTO_LOCK_MALLOC);
253 0 : mh_mode &= ~CRYPTO_MEM_CHECK_ENABLE;
254 0 : CRYPTO_THREADID_cpy(&disabling_threadid, &cur);
255 : }
256 0 : num_disable++;
257 : }
258 : break;
259 : case CRYPTO_MEM_CHECK_ENABLE: /* aka MemCheck_on() */
260 242 : if (mh_mode & CRYPTO_MEM_CHECK_ON) {
261 0 : if (num_disable) { /* always true, or something is going wrong */
262 0 : num_disable--;
263 0 : if (num_disable == 0) {
264 0 : mh_mode |= CRYPTO_MEM_CHECK_ENABLE;
265 0 : CRYPTO_w_unlock(CRYPTO_LOCK_MALLOC2);
266 : }
267 : }
268 : }
269 : break;
270 :
271 : default:
272 : break;
273 : }
274 484 : CRYPTO_w_unlock(CRYPTO_LOCK_MALLOC);
275 484 : return (ret);
276 : }
277 :
278 486 : int CRYPTO_is_mem_check_on(void)
279 : {
280 : int ret = 0;
281 :
282 486 : if (mh_mode & CRYPTO_MEM_CHECK_ON) {
283 : CRYPTO_THREADID cur;
284 0 : CRYPTO_THREADID_current(&cur);
285 0 : CRYPTO_r_lock(CRYPTO_LOCK_MALLOC);
286 :
287 0 : ret = (mh_mode & CRYPTO_MEM_CHECK_ENABLE)
288 0 : || CRYPTO_THREADID_cmp(&disabling_threadid, &cur);
289 :
290 0 : CRYPTO_r_unlock(CRYPTO_LOCK_MALLOC);
291 : }
292 486 : return (ret);
293 : }
294 :
295 0 : void CRYPTO_dbg_set_options(long bits)
296 : {
297 0 : options = bits;
298 0 : }
299 :
300 0 : long CRYPTO_dbg_get_options(void)
301 : {
302 0 : return options;
303 : }
304 :
305 : static int mem_cmp(const MEM *a, const MEM *b)
306 : {
307 : #ifdef _WIN64
308 : const char *ap = (const char *)a->addr, *bp = (const char *)b->addr;
309 : if (ap == bp)
310 : return 0;
311 : else if (ap > bp)
312 : return 1;
313 : else
314 : return -1;
315 : #else
316 0 : return (const char *)a->addr - (const char *)b->addr;
317 : #endif
318 : }
319 :
320 0 : static IMPLEMENT_LHASH_COMP_FN(mem, MEM)
321 :
322 : static unsigned long mem_hash(const MEM *a)
323 : {
324 : unsigned long ret;
325 :
326 0 : ret = (unsigned long)a->addr;
327 :
328 0 : ret = ret * 17851 + (ret >> 14) * 7 + (ret >> 4) * 251;
329 : return (ret);
330 : }
331 :
332 0 : static IMPLEMENT_LHASH_HASH_FN(mem, MEM)
333 :
334 : /* static int app_info_cmp(APP_INFO *a, APP_INFO *b) */
335 : static int app_info_cmp(const void *a_void, const void *b_void)
336 : {
337 0 : return CRYPTO_THREADID_cmp(&((const APP_INFO *)a_void)->threadid,
338 : &((const APP_INFO *)b_void)->threadid);
339 : }
340 :
341 0 : static IMPLEMENT_LHASH_COMP_FN(app_info, APP_INFO)
342 :
343 0 : static unsigned long app_info_hash(const APP_INFO *a)
344 : {
345 : unsigned long ret;
346 :
347 0 : ret = CRYPTO_THREADID_hash(&a->threadid);
348 : /* This is left in as a "who am I to question legacy?" measure */
349 0 : ret = ret * 17851 + (ret >> 14) * 7 + (ret >> 4) * 251;
350 0 : return (ret);
351 : }
352 :
353 0 : static IMPLEMENT_LHASH_HASH_FN(app_info, APP_INFO)
354 :
355 0 : static APP_INFO *pop_info(void)
356 : {
357 : APP_INFO tmp;
358 : APP_INFO *ret = NULL;
359 :
360 0 : if (amih != NULL) {
361 0 : CRYPTO_THREADID_current(&tmp.threadid);
362 0 : if ((ret = lh_APP_INFO_delete(amih, &tmp)) != NULL) {
363 0 : APP_INFO *next = ret->next;
364 :
365 0 : if (next != NULL) {
366 0 : next->references++;
367 0 : (void)lh_APP_INFO_insert(amih, next);
368 : }
369 : #ifdef LEVITTE_DEBUG_MEM
370 : if (CRYPTO_THREADID_cmp(&ret->threadid, &tmp.threadid)) {
371 : fprintf(stderr,
372 : "pop_info(): deleted info has other thread ID (%lu) than the current thread (%lu)!!!!\n",
373 : CRYPTO_THREADID_hash(&ret->threadid),
374 : CRYPTO_THREADID_hash(&tmp.threadid));
375 : abort();
376 : }
377 : #endif
378 0 : if (--(ret->references) <= 0) {
379 0 : ret->next = NULL;
380 0 : if (next != NULL)
381 0 : next->references--;
382 0 : OPENSSL_free(ret);
383 : }
384 : }
385 : }
386 0 : return (ret);
387 : }
388 :
389 243 : int CRYPTO_push_info_(const char *info, const char *file, int line)
390 : {
391 : APP_INFO *ami, *amim;
392 : int ret = 0;
393 :
394 243 : if (is_MemCheck_on()) {
395 0 : MemCheck_off(); /* obtain MALLOC2 lock */
396 :
397 0 : if ((ami = (APP_INFO *)OPENSSL_malloc(sizeof(APP_INFO))) == NULL) {
398 : ret = 0;
399 : goto err;
400 : }
401 0 : if (amih == NULL) {
402 0 : if ((amih = lh_APP_INFO_new()) == NULL) {
403 0 : OPENSSL_free(ami);
404 : ret = 0;
405 0 : goto err;
406 : }
407 : }
408 :
409 0 : CRYPTO_THREADID_current(&ami->threadid);
410 0 : ami->file = file;
411 0 : ami->line = line;
412 0 : ami->info = info;
413 0 : ami->references = 1;
414 0 : ami->next = NULL;
415 :
416 0 : if ((amim = lh_APP_INFO_insert(amih, ami)) != NULL) {
417 : #ifdef LEVITTE_DEBUG_MEM
418 : if (CRYPTO_THREADID_cmp(&ami->threadid, &amim->threadid)) {
419 : fprintf(stderr,
420 : "CRYPTO_push_info(): previous info has other thread ID (%lu) than the current thread (%lu)!!!!\n",
421 : CRYPTO_THREADID_hash(&amim->threadid),
422 : CRYPTO_THREADID_hash(&ami->threadid));
423 : abort();
424 : }
425 : #endif
426 0 : ami->next = amim;
427 : }
428 : err:
429 0 : MemCheck_on(); /* release MALLOC2 lock */
430 : }
431 :
432 243 : return (ret);
433 : }
434 :
435 243 : int CRYPTO_pop_info(void)
436 : {
437 : int ret = 0;
438 :
439 243 : if (is_MemCheck_on()) { /* _must_ be true, or something went severely
440 : * wrong */
441 0 : MemCheck_off(); /* obtain MALLOC2 lock */
442 :
443 0 : ret = (pop_info() != NULL);
444 :
445 0 : MemCheck_on(); /* release MALLOC2 lock */
446 : }
447 243 : return (ret);
448 : }
449 :
450 0 : int CRYPTO_remove_all_info(void)
451 : {
452 : int ret = 0;
453 :
454 0 : if (is_MemCheck_on()) { /* _must_ be true */
455 0 : MemCheck_off(); /* obtain MALLOC2 lock */
456 :
457 0 : while (pop_info() != NULL)
458 0 : ret++;
459 :
460 0 : MemCheck_on(); /* release MALLOC2 lock */
461 : }
462 0 : return (ret);
463 : }
464 :
465 : static unsigned long break_order_num = 0;
466 0 : void CRYPTO_dbg_malloc(void *addr, int num, const char *file, int line,
467 : int before_p)
468 : {
469 : MEM *m, *mm;
470 : APP_INFO tmp, *amim;
471 :
472 0 : switch (before_p & 127) {
473 : case 0:
474 : break;
475 : case 1:
476 0 : if (addr == NULL)
477 : break;
478 :
479 0 : if (is_MemCheck_on()) {
480 0 : MemCheck_off(); /* make sure we hold MALLOC2 lock */
481 0 : if ((m = (MEM *)OPENSSL_malloc(sizeof(MEM))) == NULL) {
482 0 : OPENSSL_free(addr);
483 0 : MemCheck_on(); /* release MALLOC2 lock if num_disabled drops
484 : * to 0 */
485 0 : return;
486 : }
487 0 : if (mh == NULL) {
488 0 : if ((mh = lh_MEM_new()) == NULL) {
489 0 : OPENSSL_free(addr);
490 0 : OPENSSL_free(m);
491 : addr = NULL;
492 0 : goto err;
493 : }
494 : }
495 :
496 0 : m->addr = addr;
497 0 : m->file = file;
498 0 : m->line = line;
499 0 : m->num = num;
500 0 : if (options & V_CRYPTO_MDEBUG_THREAD)
501 0 : CRYPTO_THREADID_current(&m->threadid);
502 : else
503 0 : memset(&m->threadid, 0, sizeof(m->threadid));
504 :
505 0 : if (order == break_order_num) {
506 : /* BREAK HERE */
507 0 : m->order = order;
508 : }
509 0 : m->order = order++;
510 : #ifdef LEVITTE_DEBUG_MEM
511 : fprintf(stderr, "LEVITTE_DEBUG_MEM: [%5ld] %c 0x%p (%d)\n",
512 : m->order, (before_p & 128) ? '*' : '+', m->addr, m->num);
513 : #endif
514 0 : if (options & V_CRYPTO_MDEBUG_TIME)
515 0 : m->time = time(NULL);
516 : else
517 0 : m->time = 0;
518 :
519 0 : CRYPTO_THREADID_current(&tmp.threadid);
520 0 : m->app_info = NULL;
521 0 : if (amih != NULL
522 0 : && (amim = lh_APP_INFO_retrieve(amih, &tmp)) != NULL) {
523 0 : m->app_info = amim;
524 0 : amim->references++;
525 : }
526 :
527 0 : if ((mm = lh_MEM_insert(mh, m)) != NULL) {
528 : /* Not good, but don't sweat it */
529 0 : if (mm->app_info != NULL) {
530 0 : mm->app_info->references--;
531 : }
532 0 : OPENSSL_free(mm);
533 : }
534 : err:
535 0 : MemCheck_on(); /* release MALLOC2 lock if num_disabled drops
536 : * to 0 */
537 : }
538 : break;
539 : }
540 : return;
541 : }
542 :
543 0 : void CRYPTO_dbg_free(void *addr, int before_p)
544 : {
545 : MEM m, *mp;
546 :
547 0 : switch (before_p) {
548 : case 0:
549 0 : if (addr == NULL)
550 : break;
551 :
552 0 : if (is_MemCheck_on() && (mh != NULL)) {
553 0 : MemCheck_off(); /* make sure we hold MALLOC2 lock */
554 :
555 0 : m.addr = addr;
556 0 : mp = lh_MEM_delete(mh, &m);
557 0 : if (mp != NULL) {
558 : #ifdef LEVITTE_DEBUG_MEM
559 : fprintf(stderr, "LEVITTE_DEBUG_MEM: [%5ld] - 0x%p (%d)\n",
560 : mp->order, mp->addr, mp->num);
561 : #endif
562 0 : if (mp->app_info != NULL)
563 0 : app_info_free(mp->app_info);
564 0 : OPENSSL_free(mp);
565 : }
566 :
567 0 : MemCheck_on(); /* release MALLOC2 lock if num_disabled drops
568 : * to 0 */
569 : }
570 : break;
571 : case 1:
572 : break;
573 : }
574 0 : }
575 :
576 0 : void CRYPTO_dbg_realloc(void *addr1, void *addr2, int num,
577 : const char *file, int line, int before_p)
578 : {
579 : MEM m, *mp;
580 :
581 : #ifdef LEVITTE_DEBUG_MEM
582 : fprintf(stderr,
583 : "LEVITTE_DEBUG_MEM: --> CRYPTO_dbg_malloc(addr1 = %p, addr2 = %p, num = %d, file = \"%s\", line = %d, before_p = %d)\n",
584 : addr1, addr2, num, file, line, before_p);
585 : #endif
586 :
587 0 : switch (before_p) {
588 : case 0:
589 : break;
590 : case 1:
591 0 : if (addr2 == NULL)
592 : break;
593 :
594 0 : if (addr1 == NULL) {
595 0 : CRYPTO_dbg_malloc(addr2, num, file, line, 128 | before_p);
596 0 : break;
597 : }
598 :
599 0 : if (is_MemCheck_on()) {
600 0 : MemCheck_off(); /* make sure we hold MALLOC2 lock */
601 :
602 0 : m.addr = addr1;
603 0 : mp = lh_MEM_delete(mh, &m);
604 0 : if (mp != NULL) {
605 : #ifdef LEVITTE_DEBUG_MEM
606 : fprintf(stderr,
607 : "LEVITTE_DEBUG_MEM: [%5ld] * 0x%p (%d) -> 0x%p (%d)\n",
608 : mp->order, mp->addr, mp->num, addr2, num);
609 : #endif
610 0 : mp->addr = addr2;
611 0 : mp->num = num;
612 0 : (void)lh_MEM_insert(mh, mp);
613 : }
614 :
615 0 : MemCheck_on(); /* release MALLOC2 lock if num_disabled drops
616 : * to 0 */
617 : }
618 : break;
619 : }
620 0 : return;
621 : }
622 :
623 : typedef struct mem_leak_st {
624 : BIO *bio;
625 : int chunks;
626 : long bytes;
627 : } MEM_LEAK;
628 :
629 0 : static void print_leak_doall_arg(const MEM *m, MEM_LEAK *l)
630 : {
631 : char buf[1024];
632 : char *bufp = buf;
633 : APP_INFO *amip;
634 : int ami_cnt;
635 : struct tm *lcl = NULL;
636 : CRYPTO_THREADID ti;
637 :
638 : #define BUF_REMAIN (sizeof buf - (size_t)(bufp - buf))
639 :
640 0 : if (m->addr == (char *)l->bio)
641 0 : return;
642 :
643 0 : if (options & V_CRYPTO_MDEBUG_TIME) {
644 0 : lcl = localtime(&m->time);
645 :
646 0 : BIO_snprintf(bufp, BUF_REMAIN, "[%02d:%02d:%02d] ",
647 : lcl->tm_hour, lcl->tm_min, lcl->tm_sec);
648 0 : bufp += strlen(bufp);
649 : }
650 :
651 0 : BIO_snprintf(bufp, BUF_REMAIN, "%5lu file=%s, line=%d, ",
652 : m->order, m->file, m->line);
653 0 : bufp += strlen(bufp);
654 :
655 0 : if (options & V_CRYPTO_MDEBUG_THREAD) {
656 0 : BIO_snprintf(bufp, BUF_REMAIN, "thread=%lu, ",
657 : CRYPTO_THREADID_hash(&m->threadid));
658 0 : bufp += strlen(bufp);
659 : }
660 :
661 0 : BIO_snprintf(bufp, BUF_REMAIN, "number=%d, address=%08lX\n",
662 0 : m->num, (unsigned long)m->addr);
663 : bufp += strlen(bufp);
664 :
665 0 : BIO_puts(l->bio, buf);
666 :
667 0 : l->chunks++;
668 0 : l->bytes += m->num;
669 :
670 0 : amip = m->app_info;
671 : ami_cnt = 0;
672 0 : if (!amip)
673 : return;
674 0 : CRYPTO_THREADID_cpy(&ti, &amip->threadid);
675 :
676 : do {
677 : int buf_len;
678 : int info_len;
679 :
680 0 : ami_cnt++;
681 0 : memset(buf, '>', ami_cnt);
682 0 : BIO_snprintf(buf + ami_cnt, sizeof buf - ami_cnt,
683 : " thread=%lu, file=%s, line=%d, info=\"",
684 0 : CRYPTO_THREADID_hash(&amip->threadid), amip->file,
685 : amip->line);
686 0 : buf_len = strlen(buf);
687 0 : info_len = strlen(amip->info);
688 0 : if (128 - buf_len - 3 < info_len) {
689 0 : memcpy(buf + buf_len, amip->info, 128 - buf_len - 3);
690 : buf_len = 128 - 3;
691 : } else {
692 0 : BUF_strlcpy(buf + buf_len, amip->info, sizeof buf - buf_len);
693 0 : buf_len = strlen(buf);
694 : }
695 0 : BIO_snprintf(buf + buf_len, sizeof buf - buf_len, "\"\n");
696 :
697 0 : BIO_puts(l->bio, buf);
698 :
699 0 : amip = amip->next;
700 : }
701 0 : while (amip && !CRYPTO_THREADID_cmp(&amip->threadid, &ti));
702 :
703 : #ifdef LEVITTE_DEBUG_MEM
704 : if (amip) {
705 : fprintf(stderr, "Thread switch detected in backtrace!!!!\n");
706 : abort();
707 : }
708 : #endif
709 : }
710 :
711 0 : static IMPLEMENT_LHASH_DOALL_ARG_FN(print_leak, const MEM, MEM_LEAK)
712 :
713 0 : void CRYPTO_mem_leaks(BIO *b)
714 : {
715 : MEM_LEAK ml;
716 :
717 0 : if (mh == NULL && amih == NULL)
718 0 : return;
719 :
720 0 : MemCheck_off(); /* obtain MALLOC2 lock */
721 :
722 0 : ml.bio = b;
723 0 : ml.bytes = 0;
724 0 : ml.chunks = 0;
725 0 : if (mh != NULL)
726 0 : lh_MEM_doall_arg(mh, LHASH_DOALL_ARG_FN(print_leak), MEM_LEAK, &ml);
727 0 : if (ml.chunks != 0) {
728 0 : BIO_printf(b, "%ld bytes leaked in %d chunks\n", ml.bytes, ml.chunks);
729 : #ifdef CRYPTO_MDEBUG_ABORT
730 : abort();
731 : #endif
732 : } else {
733 : /*
734 : * Make sure that, if we found no leaks, memory-leak debugging itself
735 : * does not introduce memory leaks (which might irritate external
736 : * debugging tools). (When someone enables leak checking, but does not
737 : * call this function, we declare it to be their fault.) XXX This
738 : * should be in CRYPTO_mem_leaks_cb, and CRYPTO_mem_leaks should be
739 : * implemented by using CRYPTO_mem_leaks_cb. (Also there should be a
740 : * variant of lh_doall_arg that takes a function pointer instead of a
741 : * void *; this would obviate the ugly and illegal void_fn_to_char
742 : * kludge in CRYPTO_mem_leaks_cb. Otherwise the code police will come
743 : * and get us.)
744 : */
745 : int old_mh_mode;
746 :
747 0 : CRYPTO_w_lock(CRYPTO_LOCK_MALLOC);
748 :
749 : /*
750 : * avoid deadlock when lh_free() uses CRYPTO_dbg_free(), which uses
751 : * CRYPTO_is_mem_check_on
752 : */
753 0 : old_mh_mode = mh_mode;
754 0 : mh_mode = CRYPTO_MEM_CHECK_OFF;
755 :
756 0 : if (mh != NULL) {
757 0 : lh_MEM_free(mh);
758 0 : mh = NULL;
759 : }
760 0 : if (amih != NULL) {
761 0 : if (lh_APP_INFO_num_items(amih) == 0) {
762 0 : lh_APP_INFO_free(amih);
763 0 : amih = NULL;
764 : }
765 : }
766 :
767 0 : mh_mode = old_mh_mode;
768 0 : CRYPTO_w_unlock(CRYPTO_LOCK_MALLOC);
769 : }
770 0 : MemCheck_on(); /* release MALLOC2 lock */
771 : }
772 :
773 : #ifndef OPENSSL_NO_FP_API
774 0 : void CRYPTO_mem_leaks_fp(FILE *fp)
775 : {
776 : BIO *b;
777 :
778 0 : if (mh == NULL)
779 : return;
780 : /*
781 : * Need to turn off memory checking when allocated BIOs ... especially as
782 : * we're creating them at a time when we're trying to check we've not
783 : * left anything un-free()'d!!
784 : */
785 0 : MemCheck_off();
786 0 : b = BIO_new(BIO_s_file());
787 0 : MemCheck_on();
788 0 : if (!b)
789 : return;
790 0 : BIO_set_fp(b, fp, BIO_NOCLOSE);
791 0 : CRYPTO_mem_leaks(b);
792 0 : BIO_free(b);
793 : }
794 : #endif
795 :
796 : /*
797 : * FIXME: We really don't allow much to the callback. For example, it has no
798 : * chance of reaching the info stack for the item it processes. Should it
799 : * really be this way? -- Richard Levitte
800 : */
801 : /*
802 : * NB: The prototypes have been typedef'd to CRYPTO_MEM_LEAK_CB inside
803 : * crypto.h If this code is restructured, remove the callback type if it is
804 : * no longer needed. -- Geoff Thorpe
805 : */
806 :
807 : /*
808 : * Can't pass CRYPTO_MEM_LEAK_CB directly to lh_MEM_doall_arg because it is a
809 : * function pointer and conversion to void * is prohibited. Instead pass its
810 : * address
811 : */
812 :
813 : typedef CRYPTO_MEM_LEAK_CB *PCRYPTO_MEM_LEAK_CB;
814 :
815 : static void cb_leak_doall_arg(const MEM *m, PCRYPTO_MEM_LEAK_CB *cb)
816 : {
817 0 : (*cb) (m->order, m->file, m->line, m->num, m->addr);
818 : }
819 :
820 0 : static IMPLEMENT_LHASH_DOALL_ARG_FN(cb_leak, const MEM, PCRYPTO_MEM_LEAK_CB)
821 :
822 0 : void CRYPTO_mem_leaks_cb(CRYPTO_MEM_LEAK_CB *cb)
823 : {
824 0 : if (mh == NULL)
825 0 : return;
826 0 : CRYPTO_w_lock(CRYPTO_LOCK_MALLOC2);
827 0 : lh_MEM_doall_arg(mh, LHASH_DOALL_ARG_FN(cb_leak), PCRYPTO_MEM_LEAK_CB,
828 : &cb);
829 0 : CRYPTO_w_unlock(CRYPTO_LOCK_MALLOC2);
830 : }
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