/* 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.]

  */

 /*

  © Portions copyright (c) 2006 Nokia Corporation.  All rights reserved.

  */

 #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>

 #if (defined(SYMBIAN) && (defined(__WINSCW__) || defined(__WINS__)))

 #include "libcrypto_wsd_macros.h"

 #include "libcrypto_wsd.h"

 #endif

 #ifndef EMULATOR

 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 */

 static LHASH *mh=NULL; /* hash-table of memory requests (address as key);

                        * access requires MALLOC2 lock */

 #endif                        

 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.

  */

 	{	

 	unsigned long thread;

 	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 *);

 #ifndef EMULATOR

 static LHASH *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 */

 #else

  GET_STATIC_VAR_FROM_TLS(amih,mem_dbg,LHASH *)

  #define amih (*GET_WSD_VAR_NAME(amih,mem_dbg,s)())

 #endif                           

 typedef struct mem_st

 /* memory-block description */

 	{

 	void *addr;

 	int num;

 	const char *file;

 	int line;

 	unsigned long thread;

 	unsigned long iorder;

 	time_t time;

 	APP_INFO *app_info;

 	} MEM;

 #ifdef EMULATOR

  GET_STATIC_VAR_FROM_TLS(mh_mode,mem_dbg,int)

  #define mh_mode (*GET_WSD_VAR_NAME(mh_mode,mem_dbg,s)())

  GET_STATIC_VAR_FROM_TLS(order,mem_dbg,unsigned long)

  #define order (*GET_WSD_VAR_NAME(order,mem_dbg,s)())

  GET_STATIC_VAR_FROM_TLS(mh,mem_dbg,LHASH*)

  #define mh (*GET_WSD_VAR_NAME(mh,mem_dbg,s)())

 #endif 

 #ifndef EMULATOR

 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)

                                       */

 static unsigned long disabling_thread = 0; /* Valid iff num_disable > 0.

                                             * CRYPTO_LOCK_MALLOC2 is locked

                                             * exactly in this case (by the

                                             * thread named in disabling_thread).

                                             */

 #else

  GET_STATIC_VAR_FROM_TLS(options,mem_dbg,unsigned long)

  #define options (*GET_WSD_VAR_NAME(options,mem_dbg,s)())

  GET_STATIC_VAR_FROM_TLS(num_disable,mem_dbg,unsigned int)

  #define num_disable (*GET_WSD_VAR_NAME(num_disable,mem_dbg,s)())

  GET_STATIC_VAR_FROM_TLS(disabling_thread,mem_dbg,unsigned long)

  #define disabling_thread (*GET_WSD_VAR_NAME(disabling_thread,mem_dbg,s)())

 #endif	

 static void app_info_free(APP_INFO *inf)

 	{

 	if (--(inf->references) <= 0)

 		{

 		if (inf->next != NULL)

 			{

 			app_info_free(inf->next);

 			}

 		OPENSSL_free(inf);

 		}

 	}

 EXPORT_C 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)

 			{

 			if (!num_disable || (disabling_thread != CRYPTO_thread_id())) /* 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;

 				disabling_thread=CRYPTO_thread_id();

 				}

 			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);

 	}

 EXPORT_C int CRYPTO_is_mem_check_on(void)

 	{

 	int ret = 0;

 	if (mh_mode & CRYPTO_MEM_CHECK_ON)

 		{

 		CRYPTO_r_lock(CRYPTO_LOCK_MALLOC);

 		ret = (mh_mode & CRYPTO_MEM_CHECK_ENABLE)

 			|| (disabling_thread != CRYPTO_thread_id());

 		CRYPTO_r_unlock(CRYPTO_LOCK_MALLOC);

 		}

 	return(ret);

 	}	

 EXPORT_C void CRYPTO_dbg_set_options(long bits)

 	{

 	options = bits;

 	}

 EXPORT_C long CRYPTO_dbg_get_options(void)

 	{

 	return options;

 	}

 /* static int mem_cmp(MEM *a, MEM *b) */

 static int mem_cmp(const void *a_void, const void *b_void)

 	{

 #ifdef _WIN64

 	const char *a=(const char *)((const MEM *)a_void)->addr,

 		   *b=(const char *)((const MEM *)b_void)->addr;

 	if (a==b)	return 0;

 	else if (a>b)	return 1;

 	else		return -1;

 #else

 	return((const char *)((const MEM *)a_void)->addr

 		- (const char *)((const MEM *)b_void)->addr);

 #endif

 	}

 /* static unsigned long mem_hash(MEM *a) */

 static unsigned long mem_hash(const void *a_void)

 	{

 	unsigned long ret;

 	ret=(unsigned long)((const MEM *)a_void)->addr;

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

 	return(ret);

 	}

 /* 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(((const APP_INFO *)a_void)->thread

 		!= ((const APP_INFO *)b_void)->thread);

 	}

 /* static unsigned long app_info_hash(APP_INFO *a) */

 static unsigned long app_info_hash(const void *a_void)

 	{

 	unsigned long ret;

 	ret=(unsigned long)((const APP_INFO *)a_void)->thread;

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

 	return(ret);

 	}

 static APP_INFO *pop_info(void)

 	{

 	APP_INFO tmp;

 	APP_INFO *ret = NULL;

 	if (amih != NULL)

 		{

 		tmp.thread=CRYPTO_thread_id();

 		if ((ret=(APP_INFO *)lh_delete(amih,&tmp)) != NULL)

 			{

 			APP_INFO *next=ret->next;

 			if (next != NULL)

 				{

 				next->references++;

 				lh_insert(amih,(char *)next);

 				}

 #ifdef LEVITTE_DEBUG_MEM

 			if (ret->thread != tmp.thread)

 				{

 				fprintf(stderr, "pop_info(): deleted info has other thread ID (%lu) than the current thread (%lu)!!!!\n",

 					ret->thread, tmp.thread);

 				abort();

 				}

 #endif

 			if (--(ret->references) <= 0)

 				{

 				ret->next = NULL;

 				if (next != NULL)

 					next->references--;

 				OPENSSL_free(ret);

 				}

 			}

 		}

 	return(ret);

 	}

 EXPORT_C int CRYPTO_push_info_(const char *info, const char *file, int line)

 	{

 	APP_INFO *ami=NULL, *amim=NULL;

 	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_new(app_info_hash, app_info_cmp)) == NULL)

 				{

 				OPENSSL_free(ami);

 				ret=0;

 				goto err;

 				}

 			}

 		ami->thread=CRYPTO_thread_id();

 		ami->file=file;

 		ami->line=line;

 		ami->info=info;

 		ami->references=1;

 		ami->next=NULL;

 		if ((amim=(APP_INFO *)lh_insert(amih,(char *)ami)) != NULL)

 			{

 #ifdef LEVITTE_DEBUG_MEM

 			if (ami->thread != amim->thread)

 				{

 				fprintf(stderr, "CRYPTO_push_info(): previous info has other thread ID (%lu) than the current thread (%lu)!!!!\n",

 					amim->thread, ami->thread);

 				abort();

 				}

 #endif

 			ami->next=amim;

 			}

  err:

 		MemCheck_on(); /* release MALLOC2 lock */

 		}

 	return(ret);

 	}

 EXPORT_C 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);

 	}

 EXPORT_C 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);

 	}

 #ifndef EMULATOR

 static unsigned long break_order_num=0;

 #else

 static const unsigned long break_order_num=0;

 #endif

 EXPORT_C void CRYPTO_dbg_malloc(void *addr, int num, const char *file, int line,

 	int before_p)

 	{

 	MEM *m=NULL,*mm=NULL;

 	APP_INFO tmp,*amim=NULL;

 	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_new(mem_hash, mem_cmp)) == 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)

 				m->thread=CRYPTO_thread_id();

 			else

 				m->thread=0;

 			if (order == break_order_num)

 				{

 				/* BREAK HERE */

 				m->iorder=order;

 				}

 			m->iorder=order++;

 #ifdef LEVITTE_DEBUG_MEM

 			fprintf(stderr, "LEVITTE_DEBUG_MEM: [%5d] %c 0x%p (%d)\n",

 				m->iorder,

 				(before_p & 128) ? '*' : '+',

 				m->addr, m->num);

 #endif

 			if (options & V_CRYPTO_MDEBUG_TIME)

 				m->time=time(NULL);

 			else

 				m->time=0;

 			tmp.thread=CRYPTO_thread_id();

 			m->app_info=NULL;

 			if (amih != NULL

 				&& (amim=(APP_INFO *)lh_retrieve(amih,(char *)&tmp)) != NULL)

 				{

 				m->app_info = amim;

 				amim->references++;

 				}

 			if ((mm=(MEM *)lh_insert(mh,(char *)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;

 	}

 EXPORT_C void CRYPTO_dbg_free(void *addr, int before_p)

 	{

 	MEM m,*mp=NULL;

 	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=(MEM *)lh_delete(mh,(char *)&m);

 			if (mp != NULL)

 				{

 #ifdef LEVITTE_DEBUG_MEM

 			fprintf(stderr, "LEVITTE_DEBUG_MEM: [%5d] - 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;

 		}

 	}

 EXPORT_C 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=(MEM *)lh_delete(mh,(char *)&m);

 			if (mp != NULL)

 				{

 #ifdef LEVITTE_DEBUG_MEM

 				fprintf(stderr, "LEVITTE_DEBUG_MEM: [%5d] * 0x%p (%d) -> 0x%p (%d)\n",

 					mp->order,

 					mp->addr, mp->num,

 					addr2, num);

 #endif

 				mp->addr=addr2;

 				mp->num=num;

 				lh_insert(mh,(char *)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(const MEM *m, MEM_LEAK *l)

 	{

 #ifndef SYMBIAN		

 	char buf[1024];

 #else

   char buf[512];

 #endif	

 	char *bufp = buf;

 	APP_INFO *amip;

 	int ami_cnt;

 	struct tm *lcl = NULL;

 	unsigned long 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->iorder,m->file,m->line);

 	bufp += strlen(bufp);

 	if (options & V_CRYPTO_MDEBUG_THREAD)

 		{

 		BIO_snprintf(bufp, BUF_REMAIN, "thread=%lu, ", m->thread);

 		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;

 	ti=amip->thread;

 	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=\"",

 			amip->thread, 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 && amip->thread == 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 *)

 EXPORT_C 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_doall_arg(mh, LHASH_DOALL_ARG_FN(print_leak),

 				(char *)&ml);

 	if (ml.chunks != 0)

 		{

 		BIO_printf(b,"%ld bytes leaked in %d chunks\n",

 			   ml.bytes,ml.chunks);

 		}

 	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 their 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_free(mh);

 			mh = NULL;

 			}

 		if (amih != NULL)

 			{

 			if (lh_num_items(amih) == 0) 

 				{

 				lh_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

 EXPORT_C void CRYPTO_mem_leaks_fp(FILE *fp)

 	{

 	BIO *b=NULL;

 	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 */

 static void cb_leak(const MEM *m, CRYPTO_MEM_LEAK_CB **cb)

 	{

 	(**cb)(m->iorder,m->file,m->line,m->num,m->addr);

 	}

 static IMPLEMENT_LHASH_DOALL_ARG_FN(cb_leak, const MEM *, CRYPTO_MEM_LEAK_CB **)

 EXPORT_C void CRYPTO_mem_leaks_cb(CRYPTO_MEM_LEAK_CB *cb)

 	{

 	if (mh == NULL) return;

 	CRYPTO_w_lock(CRYPTO_LOCK_MALLOC2);

 	lh_doall_arg(mh, LHASH_DOALL_ARG_FN(cb_leak), &cb);

 	CRYPTO_w_unlock(CRYPTO_LOCK_MALLOC2);

 	}