lib/libcrypto/mem_dbg.c

/* crypto/mem_dbg.c */
/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
 * All rights reserved.
 *
 * This package is an SSL implementation written
 * by Eric Young (eay@cryptsoft.com).
 * The implementation was written so as to conform with Netscapes SSL.
 *
 * This library is free for commercial and non-commercial use as long as
 * the following conditions are aheared to.  The following conditions
 * apply to all code found in this distribution, be it the RC4, RSA,
 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
 * included with this distribution is covered by the same copyright terms
 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
 *
 * Copyright remains Eric Young's, and as such any Copyright notices in
 * the code are not to be removed.
 * If this package is used in a product, Eric Young should be given attribution
 * as the author of the parts of the library used.
 * This can be in the form of a textual message at program startup or
 * in documentation (online or textual) provided with the package.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *    "This product includes cryptographic software written by
 *     Eric Young (eay@cryptsoft.com)"
 *    The word 'cryptographic' can be left out if the rouines from the library
 *    being used are not cryptographic related :-).
 * 4. If you include any Windows specific code (or a derivative thereof) from
 *    the apps directory (application code) you must include an acknowledgement:
 *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
 *
 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * The licence and distribution terms for any publically available version or
 * derivative of this code cannot be changed.  i.e. this code cannot simply be
 * copied and put under another distribution licence
 * [including the GNU Public Licence.]
 */
/* ====================================================================
 * Copyright (c) 1998-2006 The OpenSSL Project.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. All advertising materials mentioning features or use of this
 *    software must display the following acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
 *
 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
 *    endorse or promote products derived from this software without
 *    prior written permission. For written permission, please contact
 *    openssl-core@openssl.org.
 *
 * 5. Products derived from this software may not be called "OpenSSL"
 *    nor may "OpenSSL" appear in their names without prior written
 *    permission of the OpenSSL Project.
 *
 * 6. Redistributions of any form whatsoever must retain the following
 *    acknowledgment:
 *    "This product includes software developed by the OpenSSL Project
 *    for use in the OpenSSL Toolkit (http://www.openssl.org/)"
 *
 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 * ====================================================================
 *
 * This product includes cryptographic software written by Eric Young
 * (eay@cryptsoft.com).  This product includes software written by Tim
 * Hudson (tjh@cryptsoft.com).
 *
 */

#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include "cryptlib.h"
#include <openssl/crypto.h>
#include <openssl/buffer.h>
#include <openssl/bio.h>
#include <openssl/lhash.h>

static int mh_mode = CRYPTO_MEM_CHECK_OFF;
/* The state changes to CRYPTO_MEM_CHECK_ON | CRYPTO_MEM_CHECK_ENABLE
 * when the application asks for it (usually after library initialisation
 * for which no book-keeping is desired).
 *
 * State CRYPTO_MEM_CHECK_ON exists only temporarily when the library
 * thinks that certain allocations should not be checked (e.g. the data
 * structures used for memory checking).  It is not suitable as an initial
 * state: the library will unexpectedly enable memory checking when it
 * executes one of those sections that want to disable checking
 * temporarily.
 *
 * State CRYPTO_MEM_CHECK_ENABLE without ..._ON makes no sense whatsoever.
 */

static unsigned long order = 0; /* number of memory requests */

DECLARE_LHASH_OF(MEM);
static LHASH_OF(MEM) *mh = NULL; /* hash - table of memory requests
				  * (address as key); access requires
				  * MALLOC2 lock */

typedef struct app_mem_info_st
/* For application-defined information (static C-string `info')
 * to be displayed in memory leak list.
 * Each thread has its own stack.  For applications, there is
 *   CRYPTO_push_info("...")     to push an entry,
 *   CRYPTO_pop_info()           to pop an entry,
 *   CRYPTO_remove_all_info()    to pop all entries.
 */
{
	CRYPTO_THREADID threadid;
	const char *file;
	int line;
	const char *info;
	struct app_mem_info_st *next; /* tail of thread's stack */
	int references;
} APP_INFO;

static void app_info_free(APP_INFO *);

DECLARE_LHASH_OF(APP_INFO);
static LHASH_OF(APP_INFO) *amih = NULL; /* hash - table with those
					 * app_mem_info_st's that are at
					 * the top of their thread's
					 * stack (with `thread' as key);
					 * access requires MALLOC2
					 * lock */

typedef struct mem_st
/* memory-block description */
{
	void *addr;
	int num;
	const char *file;
	int line;
	CRYPTO_THREADID threadid;
	unsigned long order;
	time_t time;
	APP_INFO *app_info;
} MEM;

static long options =             /* extra information to be recorded */
#if defined(CRYPTO_MDEBUG_TIME) || defined(CRYPTO_MDEBUG_ALL)
V_CRYPTO_MDEBUG_TIME |
#endif
#if defined(CRYPTO_MDEBUG_THREAD) || defined(CRYPTO_MDEBUG_ALL)
V_CRYPTO_MDEBUG_THREAD |
#endif
0;


static unsigned int num_disable = 0; /* num_disable > 0
				      *     iff
				      * mh_mode == CRYPTO_MEM_CHECK_ON (w/o ..._ENABLE)
				      */

/* Valid iff num_disable > 0.  CRYPTO_LOCK_MALLOC2 is locked exactly in this
 * case (by the thread named in disabling_thread).
 */
static CRYPTO_THREADID disabling_threadid;

static void
app_info_free(APP_INFO *inf)
{
	if (--(inf->references) <= 0) {
		if (inf->next != NULL) {
			app_info_free(inf->next);
		}
		OPENSSL_free(inf);
	}
}

int
CRYPTO_mem_ctrl(int mode)
{
	int ret = mh_mode;

	CRYPTO_w_lock(CRYPTO_LOCK_MALLOC);
	switch (mode) {
	/* for applications (not to be called while multiple threads
	 * use the library): */
	case CRYPTO_MEM_CHECK_ON: /* aka MemCheck_start() */
		mh_mode = CRYPTO_MEM_CHECK_ON|CRYPTO_MEM_CHECK_ENABLE;
		num_disable = 0;
		break;
	case CRYPTO_MEM_CHECK_OFF: /* aka MemCheck_stop() */
		mh_mode = 0;
		num_disable = 0; /* should be true *before* MemCheck_stop is used,
		                    or there'll be a lot of confusion */
		break;

		/* switch off temporarily (for library-internal use): */
	case CRYPTO_MEM_CHECK_DISABLE: /* aka MemCheck_off() */
		if (mh_mode & CRYPTO_MEM_CHECK_ON) {
			CRYPTO_THREADID cur;
			CRYPTO_THREADID_current(&cur);
			if (!num_disable || CRYPTO_THREADID_cmp(&disabling_threadid, &cur)) /* otherwise we already have the MALLOC2 lock */
			{
				/* Long-time lock CRYPTO_LOCK_MALLOC2 must not be claimed while
				 * we're holding CRYPTO_LOCK_MALLOC, or we'll deadlock if
				 * somebody else holds CRYPTO_LOCK_MALLOC2 (and cannot release
				 * it because we block entry to this function).
				 * Give them a chance, first, and then claim the locks in
				 * appropriate order (long-time lock first).
				 */
				CRYPTO_w_unlock(CRYPTO_LOCK_MALLOC);
				/* Note that after we have waited for CRYPTO_LOCK_MALLOC2
				 * and CRYPTO_LOCK_MALLOC, we'll still be in the right
				 * "case" and "if" branch because MemCheck_start and
				 * MemCheck_stop may never be used while there are multiple
				 * OpenSSL threads. */
				CRYPTO_w_lock(CRYPTO_LOCK_MALLOC2);
				CRYPTO_w_lock(CRYPTO_LOCK_MALLOC);
				mh_mode &= ~CRYPTO_MEM_CHECK_ENABLE;
				CRYPTO_THREADID_cpy(&disabling_threadid, &cur);
			}
			num_disable++;
		}
		break;
	case CRYPTO_MEM_CHECK_ENABLE: /* aka MemCheck_on() */
		if (mh_mode & CRYPTO_MEM_CHECK_ON) {
			if (num_disable) /* always true, or something is going wrong */
			{
				num_disable--;
				if (num_disable == 0) {
					mh_mode|=CRYPTO_MEM_CHECK_ENABLE;
					CRYPTO_w_unlock(CRYPTO_LOCK_MALLOC2);
				}
			}
		}
		break;

	default:
		break;
	}
	CRYPTO_w_unlock(CRYPTO_LOCK_MALLOC);
	return (ret);
}

int
CRYPTO_is_mem_check_on(void)
{
	int ret = 0;

	if (mh_mode & CRYPTO_MEM_CHECK_ON) {
		CRYPTO_THREADID cur;
		CRYPTO_THREADID_current(&cur);
		CRYPTO_r_lock(CRYPTO_LOCK_MALLOC);

		ret = (mh_mode & CRYPTO_MEM_CHECK_ENABLE) ||
		    CRYPTO_THREADID_cmp(&disabling_threadid, &cur);

		CRYPTO_r_unlock(CRYPTO_LOCK_MALLOC);
	}
	return (ret);
}


void
CRYPTO_dbg_set_options(long bits)
{
	options = bits;
}

long
CRYPTO_dbg_get_options(void)
{
	return options;
}

static int
mem_cmp(const MEM *a, const MEM *b)
{
#ifdef _WIN64
	const char *ap = (const char *)a->addr,
	*bp = (const char *)b->addr;
	if (ap == bp)
		return 0;
	else if (ap > bp)	return 1;
		else		return -1;
#else
	return (const char *)a->addr - (const char *)b->addr;
#endif
}

static IMPLEMENT_LHASH_COMP_FN(mem, MEM)

static unsigned long
mem_hash(const MEM *a)
{
	unsigned long ret;

	ret = (unsigned long)a->addr;

	ret = ret * 17851 + (ret >> 14) * 7 + (ret >> 4) * 251;
	return (ret);
}

static
IMPLEMENT_LHASH_HASH_FN(mem, MEM)

/* static int app_info_cmp(APP_INFO *a, APP_INFO *b) */
static int
app_info_cmp(const void *a_void, const void *b_void)
{
	return CRYPTO_THREADID_cmp(&((const APP_INFO *)a_void)->threadid,
	    &((const APP_INFO *)b_void)->threadid);
}

static IMPLEMENT_LHASH_COMP_FN(app_info, APP_INFO)

static unsigned long
app_info_hash(const APP_INFO *a)
{
	unsigned long ret;

	ret = CRYPTO_THREADID_hash(&a->threadid);
	/* This is left in as a "who am I to question legacy?" measure */
	ret = ret * 17851 + (ret >> 14) * 7 + (ret >> 4) * 251;
	return (ret);
}

static IMPLEMENT_LHASH_HASH_FN(app_info, APP_INFO)

static APP_INFO
*pop_info(void)
{
	APP_INFO tmp;
	APP_INFO *ret = NULL;

	if (amih != NULL) {
		CRYPTO_THREADID_current(&tmp.threadid);
		if ((ret = lh_APP_INFO_delete(amih, &tmp)) != NULL) {
			APP_INFO *next = ret->next;

			if (next != NULL) {
				next->references++;
				(void)lh_APP_INFO_insert(amih, next);
			}
#ifdef LEVITTE_DEBUG_MEM
			if (CRYPTO_THREADID_cmp(&ret->threadid, &tmp.threadid)) {
				fprintf(stderr, "pop_info(): deleted info has other thread ID (%lu) than the current thread (%lu)!!!!\n",
				CRYPTO_THREADID_hash(&ret->threadid),
				CRYPTO_THREADID_hash(&tmp.threadid));
				abort();
			}
#endif
			if (--(ret->references) <= 0) {
				ret->next = NULL;
				if (next != NULL)
					next->references--;
				OPENSSL_free(ret);
			}
		}
	}
	return (ret);
}

int
CRYPTO_push_info_(const char *info, const char *file, int line)
{
	APP_INFO *ami, *amim;
	int ret = 0;

	if (is_MemCheck_on()) {
		MemCheck_off(); /* obtain MALLOC2 lock */

		if ((ami = (APP_INFO *)OPENSSL_malloc(sizeof(APP_INFO))) == NULL) {
			ret = 0;
			goto err;
		}
		if (amih == NULL) {
			if ((amih = lh_APP_INFO_new()) == NULL) {
				OPENSSL_free(ami);
				ret = 0;
				goto err;
			}
		}

		CRYPTO_THREADID_current(&ami->threadid);
		ami->file = file;
		ami->line = line;
		ami->info = info;
		ami->references = 1;
		ami->next = NULL;

		if ((amim = lh_APP_INFO_insert(amih, ami)) != NULL) {
#ifdef LEVITTE_DEBUG_MEM
			if (CRYPTO_THREADID_cmp(&ami->threadid, &amim->threadid)) {
				fprintf(stderr, "CRYPTO_push_info(): previous info has other thread ID (%lu) than the current thread (%lu)!!!!\n",
				CRYPTO_THREADID_hash(&amim->threadid),
				CRYPTO_THREADID_hash(&ami->threadid));
				abort();
			}
#endif
			ami->next = amim;
		}
		err:
		MemCheck_on(); /* release MALLOC2 lock */
	}

	return (ret);
}

int
CRYPTO_pop_info(void)
{
	int ret = 0;

	if (is_MemCheck_on()) /* _must_ be true, or something went severely wrong */
	{
		MemCheck_off(); /* obtain MALLOC2 lock */

		ret = (pop_info() != NULL);

		MemCheck_on(); /* release MALLOC2 lock */
	}
	return (ret);
}

int
CRYPTO_remove_all_info(void)
{
	int ret = 0;

	if (is_MemCheck_on()) /* _must_ be true */
	{
		MemCheck_off(); /* obtain MALLOC2 lock */

		while (pop_info() != NULL)
		ret++;

		MemCheck_on(); /* release MALLOC2 lock */
	}
	return (ret);
}


static unsigned long break_order_num = 0;
void
CRYPTO_dbg_malloc(void *addr, int num, const char *file, int line,
    int before_p)
{
	MEM *m, *mm;
	APP_INFO tmp, *amim;

	switch (before_p & 127) {
	case 0:
		break;
	case 1:
		if (addr == NULL)
			break;

		if (is_MemCheck_on()) {
			MemCheck_off(); /* make sure we hold MALLOC2 lock */
			if ((m = (MEM *)OPENSSL_malloc(sizeof(MEM))) == NULL) {
				OPENSSL_free(addr);
				MemCheck_on(); /* release MALLOC2 lock
				                * if num_disabled drops to 0 */
				return;
			}
			if (mh == NULL) {
				if ((mh = lh_MEM_new()) == NULL) {
					OPENSSL_free(addr);
					OPENSSL_free(m);
					addr = NULL;
					goto err;
				}
			}

			m->addr = addr;
			m->file = file;
			m->line = line;
			m->num = num;
			if (options & V_CRYPTO_MDEBUG_THREAD)
				CRYPTO_THREADID_current(&m->threadid);
			else
				memset(&m->threadid, 0, sizeof(m->threadid));

			if (order == break_order_num) {
				/* BREAK HERE */
				m->order = order;
			}
			m->order = order++;
#ifdef LEVITTE_DEBUG_MEM
			fprintf(stderr, "LEVITTE_DEBUG_MEM: [%5ld] %c 0x%p (%d)\n",
			    m->order,
			    (before_p & 128) ? '*' : '+',
			    m->addr, m->num);
#endif
			if (options & V_CRYPTO_MDEBUG_TIME)
				m->time = time(NULL);
			else
				m->time = 0;

			CRYPTO_THREADID_current(&tmp.threadid);
			m->app_info = NULL;
			if (amih != NULL &&
			    (amim = lh_APP_INFO_retrieve(amih, &tmp)) != NULL) {
				m->app_info = amim;
				amim->references++;
			}

			if ((mm = lh_MEM_insert(mh, m)) != NULL) {
				/* Not good, but don't sweat it */
				if (mm->app_info != NULL) {
					mm->app_info->references--;
				}
				OPENSSL_free(mm);
			}
err:
			MemCheck_on(); /* release MALLOC2 lock
			                * if num_disabled drops to 0 */
		}
		break;
	}
	return;
}

void
CRYPTO_dbg_free(void *addr, int before_p)
{
	MEM m, *mp;

	switch (before_p) {
	case 0:
		if (addr == NULL)
			break;

		if (is_MemCheck_on() && (mh != NULL)) {
			MemCheck_off(); /* make sure we hold MALLOC2 lock */

			m.addr = addr;
			mp = lh_MEM_delete(mh, &m);
			if (mp != NULL) {
#ifdef LEVITTE_DEBUG_MEM
				fprintf(stderr, "LEVITTE_DEBUG_MEM: [%5ld] - 0x%p (%d)\n",
				mp->order, mp->addr, mp->num);
#endif
				if (mp->app_info != NULL)
					app_info_free(mp->app_info);
				OPENSSL_free(mp);
			}

			MemCheck_on(); /* release MALLOC2 lock
			                * if num_disabled drops to 0 */
		}
		break;
	case 1:
		break;
	}
}

void
CRYPTO_dbg_realloc(void *addr1, void *addr2, int num,
    const char *file, int line, int before_p)
{
	MEM m, *mp;

#ifdef LEVITTE_DEBUG_MEM
	fprintf(stderr, "LEVITTE_DEBUG_MEM: --> CRYPTO_dbg_malloc(addr1 = %p, addr2 = %p, num = %d, file = \"%s\", line = %d, before_p = %d)\n",
	addr1, addr2, num, file, line, before_p);
#endif

	switch (before_p) {
	case 0:
		break;
	case 1:
		if (addr2 == NULL)
			break;

		if (addr1 == NULL) {
			CRYPTO_dbg_malloc(addr2, num, file, line, 128 | before_p);
			break;
		}

		if (is_MemCheck_on()) {
			MemCheck_off(); /* make sure we hold MALLOC2 lock */

			m.addr = addr1;
			mp = lh_MEM_delete(mh, &m);
			if (mp != NULL) {
#ifdef LEVITTE_DEBUG_MEM
				fprintf(stderr, "LEVITTE_DEBUG_MEM: [%5ld] * 0x%p (%d) -> 0x%p (%d)\n",
				    mp->order,
				    mp->addr, mp->num,
				    addr2, num);
#endif
				mp->addr = addr2;
				mp->num = num;
				(void)lh_MEM_insert(mh, mp);
			}

			MemCheck_on(); /* release MALLOC2 lock
			                * if num_disabled drops to 0 */
		}
		break;
	}
	return;
}


typedef struct mem_leak_st {
	BIO *bio;
	int chunks;
	long bytes;
} MEM_LEAK;

static void
print_leak_doall_arg(const MEM *m, MEM_LEAK *l)
{
	char buf[1024];
	char *bufp = buf;
	APP_INFO *amip;
	int ami_cnt;
	struct tm *lcl = NULL;
	CRYPTO_THREADID ti;

#define BUF_REMAIN (sizeof buf - (size_t)(bufp - buf))

	if (m->addr == (char *)l->bio)
		return;

	if (options & V_CRYPTO_MDEBUG_TIME) {
		lcl = localtime(&m->time);

		BIO_snprintf(bufp, BUF_REMAIN, "[%02d:%02d:%02d] ",
		lcl->tm_hour, lcl->tm_min, lcl->tm_sec);
		bufp += strlen(bufp);
	}

	BIO_snprintf(bufp, BUF_REMAIN, "%5lu file=%s, line=%d, ",
	m->order, m->file, m->line);
	bufp += strlen(bufp);

	if (options & V_CRYPTO_MDEBUG_THREAD) {
		BIO_snprintf(bufp, BUF_REMAIN, "thread=%lu, ",
		CRYPTO_THREADID_hash(&m->threadid));
		bufp += strlen(bufp);
	}

	BIO_snprintf(bufp, BUF_REMAIN, "number=%d, address=%08lX\n",
	m->num,(unsigned long)m->addr);
	bufp += strlen(bufp);

	BIO_puts(l->bio, buf);

	l->chunks++;
	l->bytes += m->num;

	amip = m->app_info;
	ami_cnt = 0;
	if (!amip)
		return;
	CRYPTO_THREADID_cpy(&ti, &amip->threadid);

	do {
		int buf_len;
		int info_len;

		ami_cnt++;
		memset(buf, '>', ami_cnt);
		BIO_snprintf(buf + ami_cnt, sizeof buf - ami_cnt,
		" thread=%lu, file=%s, line=%d, info=\"",
		CRYPTO_THREADID_hash(&amip->threadid), amip->file,
		amip->line);
		buf_len = strlen(buf);
		info_len = strlen(amip->info);
		if (128 - buf_len - 3 < info_len) {
			memcpy(buf + buf_len, amip->info, 128 - buf_len - 3);
			buf_len = 128 - 3;
		} else {
			BUF_strlcpy(buf + buf_len, amip->info,
			sizeof buf - buf_len);
			buf_len = strlen(buf);
		}
		BIO_snprintf(buf + buf_len, sizeof buf - buf_len, "\"\n");

		BIO_puts(l->bio, buf);

		amip = amip->next;
	} while (amip && !CRYPTO_THREADID_cmp(&amip->threadid, &ti));

#ifdef LEVITTE_DEBUG_MEM
	if (amip) {
		fprintf(stderr, "Thread switch detected in backtrace!!!!\n");
		abort();
	}
#endif
}

static
IMPLEMENT_LHASH_DOALL_ARG_FN(print_leak, const MEM, MEM_LEAK)

void
CRYPTO_mem_leaks(BIO *b)
{
	MEM_LEAK ml;

	if (mh == NULL && amih == NULL)
		return;

	MemCheck_off(); /* obtain MALLOC2 lock */

	ml.bio = b;
	ml.bytes = 0;
	ml.chunks = 0;
	if (mh != NULL)
		lh_MEM_doall_arg(mh, LHASH_DOALL_ARG_FN(print_leak),
		    MEM_LEAK, &ml);
	if (ml.chunks != 0) {
		BIO_printf(b, "%ld bytes leaked in %d chunks\n",
		ml.bytes, ml.chunks);
#ifdef CRYPTO_MDEBUG_ABORT
		abort();
#endif
	} else {
		/* Make sure that, if we found no leaks, memory-leak debugging itself
		 * does not introduce memory leaks (which might irritate
		 * external debugging tools).
		 * (When someone enables leak checking, but does not call
		 * this function, we declare it to be their fault.)
		 *
		 * XXX    This should be in CRYPTO_mem_leaks_cb,
		 * and CRYPTO_mem_leaks should be implemented by
		 * using CRYPTO_mem_leaks_cb.
		 * (Also there should be a variant of lh_doall_arg
		 * that takes a function pointer instead of a void *;
		 * this would obviate the ugly and illegal
		 * void_fn_to_char kludge in CRYPTO_mem_leaks_cb.
		 * Otherwise the code police will come and get us.)
		 */
		int old_mh_mode;

		CRYPTO_w_lock(CRYPTO_LOCK_MALLOC);

		/* avoid deadlock when lh_free() uses CRYPTO_dbg_free(),
		 * which uses CRYPTO_is_mem_check_on */
		old_mh_mode = mh_mode;
		mh_mode = CRYPTO_MEM_CHECK_OFF;

		if (mh != NULL) {
			lh_MEM_free(mh);
			mh = NULL;
		}
		if (amih != NULL) {
			if (lh_APP_INFO_num_items(amih) == 0) {
				lh_APP_INFO_free(amih);
				amih = NULL;
			}
		}

		mh_mode = old_mh_mode;
		CRYPTO_w_unlock(CRYPTO_LOCK_MALLOC);
	}
	MemCheck_on(); /* release MALLOC2 lock */
}

#ifndef OPENSSL_NO_FP_API
void
CRYPTO_mem_leaks_fp(FILE *fp)
{
	BIO *b;

	if (mh == NULL)
		return;
	/* Need to turn off memory checking when allocated BIOs ... especially
	 * as we're creating them at a time when we're trying to check we've not
	 * left anything un-free()'d!! */
	MemCheck_off();
	b = BIO_new(BIO_s_file());
	MemCheck_on();
	if (!b)
		return;
	BIO_set_fp(b, fp, BIO_NOCLOSE);
	CRYPTO_mem_leaks(b);
	BIO_free(b);
}
#endif


/* FIXME: We really don't allow much to the callback.  For example, it has
   no chance of reaching the info stack for the item it processes.  Should
   it really be this way?  -- Richard Levitte */
/* NB: The prototypes have been typedef'd to CRYPTO_MEM_LEAK_CB inside crypto.h
 * If this code is restructured, remove the callback type if it is no longer
 * needed. -- Geoff Thorpe */

/* Can't pass CRYPTO_MEM_LEAK_CB directly to lh_MEM_doall_arg because it
 * is a function pointer and conversion to void * is prohibited. Instead
 * pass its address
 */

typedef CRYPTO_MEM_LEAK_CB *PCRYPTO_MEM_LEAK_CB;

static void
cb_leak_doall_arg(const MEM *m, PCRYPTO_MEM_LEAK_CB *cb)
{
	(*cb)(m->order, m->file, m->line, m->num, m->addr);
}

static IMPLEMENT_LHASH_DOALL_ARG_FN(cb_leak, const MEM, PCRYPTO_MEM_LEAK_CB)

void
CRYPTO_mem_leaks_cb(CRYPTO_MEM_LEAK_CB *cb)
{
	if (mh == NULL)
		return;
	CRYPTO_w_lock(CRYPTO_LOCK_MALLOC2);
	lh_MEM_doall_arg(mh, LHASH_DOALL_ARG_FN(cb_leak), PCRYPTO_MEM_LEAK_CB,
	&cb);
	CRYPTO_w_unlock(CRYPTO_LOCK_MALLOC2);
}