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