mem_dbg.c

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/* crypto/mem_dbg.c */
/* Copyright (C) 1995-1998 Eric Young ([email protected])
 * All rights reserved.
 *
 * This package is an SSL implementation written
 * by Eric Young ([email protected]).
 * 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 ([email protected]).
 * 
 * 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 ([email protected])"
 *    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 ([email protected])"
 * 
 * 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
 *    [email protected].
 *
 * 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
 * ([email protected]).  This product includes software written by Tim
 * Hudson ([email protected]).
 *
 */

#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);
    }