+++ /dev/null
-/*
- * Copyright 1995-2017 The OpenSSL Project Authors. All Rights Reserved.
- *
- * Licensed under the OpenSSL license (the "License"). You may not use
- * this file except in compliance with the License. You can obtain a copy
- * in the file LICENSE in the source distribution or at
- * https://www.openssl.org/source/license.html
- */
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <time.h>
-#include "internal/cryptlib.h"
-#include "internal/thread_once.h"
-#include <openssl/crypto.h>
-#include <openssl/buffer.h>
-#include "internal/bio.h"
-#include <openssl/lhash.h>
-
-#ifndef OPENSSL_NO_CRYPTO_MDEBUG_BACKTRACE
-# include <execinfo.h>
-#endif
-
-/*
- * 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.
- */
-#ifndef OPENSSL_NO_CRYPTO_MDEBUG
-static int mh_mode = CRYPTO_MEM_CHECK_OFF;
-#endif
-
-#ifndef OPENSSL_NO_CRYPTO_MDEBUG
-static unsigned long order = 0; /* number of memory requests */
-
-/*-
- * 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
- * OPENSSL_mem_debug_push("...") to push an entry,
- * OPENSSL_mem_debug_pop() to pop an entry,
- */
-struct app_mem_info_st {
- CRYPTO_THREAD_ID threadid;
- const char *file;
- int line;
- const char *info;
- struct app_mem_info_st *next; /* tail of thread's stack */
- int references;
-};
-
-static CRYPTO_ONCE memdbg_init = CRYPTO_ONCE_STATIC_INIT;
-CRYPTO_RWLOCK *memdbg_lock;
-static CRYPTO_RWLOCK *long_memdbg_lock;
-static CRYPTO_THREAD_LOCAL appinfokey;
-
-/* memory-block description */
-struct mem_st {
- void *addr;
- int num;
- const char *file;
- int line;
- CRYPTO_THREAD_ID threadid;
- unsigned long order;
- time_t time;
- APP_INFO *app_info;
-#ifndef OPENSSL_NO_CRYPTO_MDEBUG_BACKTRACE
- void *array[30];
- size_t array_siz;
-#endif
-};
-
-/*
- * hash-table of memory requests (address as * key); access requires
- * long_memdbg_lock lock
- */
-static LHASH_OF(MEM) *mh = NULL;
-
-/* num_disable > 0 iff mh_mode == CRYPTO_MEM_CHECK_ON (w/o ..._ENABLE) */
-static unsigned int num_disable = 0;
-
-/*
- * Valid iff num_disable > 0. long_memdbg_lock is locked exactly in this
- * case (by the thread named in disabling_thread).
- */
-static CRYPTO_THREAD_ID disabling_threadid;
-
-DEFINE_RUN_ONCE_STATIC(do_memdbg_init)
-{
- memdbg_lock = CRYPTO_THREAD_glock_new("malloc");
- long_memdbg_lock = CRYPTO_THREAD_glock_new("long_malloc");
- if (memdbg_lock == NULL
- || long_memdbg_lock == NULL
- || !CRYPTO_THREAD_init_local(&appinfokey, NULL)) {
- CRYPTO_THREAD_lock_free(memdbg_lock);
- memdbg_lock = NULL;
- CRYPTO_THREAD_lock_free(long_memdbg_lock);
- long_memdbg_lock = NULL;
- return 0;
- }
- return 1;
-}
-
-static void app_info_free(APP_INFO *inf)
-{
- if (inf == NULL)
- return;
- if (--(inf->references) <= 0) {
- app_info_free(inf->next);
- OPENSSL_free(inf);
- }
-}
-#endif
-
-int CRYPTO_mem_ctrl(int mode)
-{
-#ifdef OPENSSL_NO_CRYPTO_MDEBUG
- return mode - mode;
-#else
- int ret = mh_mode;
-
- if (!RUN_ONCE(&memdbg_init, do_memdbg_init))
- return -1;
-
- CRYPTO_THREAD_write_lock(memdbg_lock);
- switch (mode) {
- default:
- break;
-
- case CRYPTO_MEM_CHECK_ON:
- mh_mode = CRYPTO_MEM_CHECK_ON | CRYPTO_MEM_CHECK_ENABLE;
- num_disable = 0;
- break;
-
- case CRYPTO_MEM_CHECK_OFF:
- mh_mode = 0;
- num_disable = 0;
- break;
-
- /* switch off temporarily (for library-internal use): */
- case CRYPTO_MEM_CHECK_DISABLE:
- if (mh_mode & CRYPTO_MEM_CHECK_ON) {
- CRYPTO_THREAD_ID cur = CRYPTO_THREAD_get_current_id();
- /* see if we don't have long_memdbg_lock already */
- if (!num_disable
- || !CRYPTO_THREAD_compare_id(disabling_threadid, cur)) {
- /*
- * Long-time lock long_memdbg_lock must not be claimed
- * while we're holding memdbg_lock, or we'll deadlock
- * if somebody else holds long_memdbg_lock (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_THREAD_unlock(memdbg_lock);
- /*
- * Note that after we have waited for long_memdbg_lock and
- * memdbg_lock, 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_THREAD_write_lock(long_memdbg_lock);
- CRYPTO_THREAD_write_lock(memdbg_lock);
- mh_mode &= ~CRYPTO_MEM_CHECK_ENABLE;
- disabling_threadid = cur;
- }
- num_disable++;
- }
- break;
-
- case CRYPTO_MEM_CHECK_ENABLE:
- 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_THREAD_unlock(long_memdbg_lock);
- }
- }
- }
- break;
- }
- CRYPTO_THREAD_unlock(memdbg_lock);
- return ret;
-#endif
-}
-
-#ifndef OPENSSL_NO_CRYPTO_MDEBUG
-
-static int mem_check_on(void)
-{
- int ret = 0;
- CRYPTO_THREAD_ID cur;
-
- if (mh_mode & CRYPTO_MEM_CHECK_ON) {
- if (!RUN_ONCE(&memdbg_init, do_memdbg_init))
- return 0;
-
- cur = CRYPTO_THREAD_get_current_id();
- CRYPTO_THREAD_read_lock(memdbg_lock);
-
- ret = (mh_mode & CRYPTO_MEM_CHECK_ENABLE)
- || !CRYPTO_THREAD_compare_id(disabling_threadid, cur);
-
- CRYPTO_THREAD_unlock(memdbg_lock);
- }
- return ret;
-}
-
-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 unsigned long mem_hash(const MEM *a)
-{
- size_t ret;
-
- ret = (size_t)a->addr;
-
- ret = ret * 17851 + (ret >> 14) * 7 + (ret >> 4) * 251;
- return ret;
-}
-
-/* returns 1 if there was an info to pop, 0 if the stack was empty. */
-static int pop_info(void)
-{
- APP_INFO *current = NULL;
-
- if (!RUN_ONCE(&memdbg_init, do_memdbg_init))
- return 0;
-
- current = (APP_INFO *)CRYPTO_THREAD_get_local(&appinfokey);
- if (current != NULL) {
- APP_INFO *next = current->next;
-
- if (next != NULL) {
- next->references++;
- CRYPTO_THREAD_set_local(&appinfokey, next);
- } else {
- CRYPTO_THREAD_set_local(&appinfokey, NULL);
- }
- if (--(current->references) <= 0) {
- current->next = NULL;
- if (next != NULL)
- next->references--;
- OPENSSL_free(current);
- }
- return 1;
- }
- return 0;
-}
-
-int CRYPTO_mem_debug_push(const char *info, const char *file, int line)
-{
- APP_INFO *ami, *amim;
- int ret = 0;
-
- if (mem_check_on()) {
- CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_DISABLE);
-
- if (!RUN_ONCE(&memdbg_init, do_memdbg_init)
- || (ami = OPENSSL_malloc(sizeof(*ami))) == NULL)
- goto err;
-
- ami->threadid = CRYPTO_THREAD_get_current_id();
- ami->file = file;
- ami->line = line;
- ami->info = info;
- ami->references = 1;
- ami->next = NULL;
-
- amim = (APP_INFO *)CRYPTO_THREAD_get_local(&appinfokey);
- CRYPTO_THREAD_set_local(&appinfokey, ami);
-
- if (amim != NULL)
- ami->next = amim;
- ret = 1;
- err:
- CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_ENABLE);
- }
-
- return ret;
-}
-
-int CRYPTO_mem_debug_pop(void)
-{
- int ret = 0;
-
- if (mem_check_on()) {
- CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_DISABLE);
- ret = pop_info();
- CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_ENABLE);
- }
- return ret;
-}
-
-static unsigned long break_order_num = 0;
-
-void CRYPTO_mem_debug_malloc(void *addr, size_t num, int before_p,
- const char *file, int line)
-{
- MEM *m, *mm;
- APP_INFO *amim;
-
- switch (before_p & 127) {
- case 0:
- break;
- case 1:
- if (addr == NULL)
- break;
-
- if (mem_check_on()) {
- CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_DISABLE);
-
- if (!RUN_ONCE(&memdbg_init, do_memdbg_init)
- || (m = OPENSSL_malloc(sizeof(*m))) == NULL) {
- OPENSSL_free(addr);
- CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_ENABLE);
- return;
- }
- if (mh == NULL) {
- if ((mh = lh_MEM_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;
- m->threadid = CRYPTO_THREAD_get_current_id();
-
- if (order == break_order_num) {
- /* BREAK HERE */
- m->order = order;
- }
- m->order = order++;
-# ifndef OPENSSL_NO_CRYPTO_MDEBUG_BACKTRACE
- m->array_siz = backtrace(m->array, OSSL_NELEM(m->array));
-# endif
- m->time = time(NULL);
-
- amim = (APP_INFO *)CRYPTO_THREAD_get_local(&appinfokey);
- m->app_info = amim;
- if (amim != NULL)
- 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:
- CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_ENABLE);
- }
- break;
- }
- return;
-}
-
-void CRYPTO_mem_debug_free(void *addr, int before_p,
- const char *file, int line)
-{
- MEM m, *mp;
-
- switch (before_p) {
- case 0:
- if (addr == NULL)
- break;
-
- if (mem_check_on() && (mh != NULL)) {
- CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_DISABLE);
-
- m.addr = addr;
- mp = lh_MEM_delete(mh, &m);
- if (mp != NULL) {
- app_info_free(mp->app_info);
- OPENSSL_free(mp);
- }
-
- CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_ENABLE);
- }
- break;
- case 1:
- break;
- }
-}
-
-void CRYPTO_mem_debug_realloc(void *addr1, void *addr2, size_t num,
- int before_p, const char *file, int line)
-{
- MEM m, *mp;
-
- switch (before_p) {
- case 0:
- break;
- case 1:
- if (addr2 == NULL)
- break;
-
- if (addr1 == NULL) {
- CRYPTO_mem_debug_malloc(addr2, num, 128 | before_p, file, line);
- break;
- }
-
- if (mem_check_on()) {
- CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_DISABLE);
-
- m.addr = addr1;
- mp = lh_MEM_delete(mh, &m);
- if (mp != NULL) {
- mp->addr = addr2;
- mp->num = num;
-#ifndef OPENSSL_NO_CRYPTO_MDEBUG_BACKTRACE
- mp->array_siz = backtrace(mp->array, OSSL_NELEM(mp->array));
-#endif
- (void)lh_MEM_insert(mh, mp);
- }
-
- CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_ENABLE);
- }
- break;
- }
- return;
-}
-
-typedef struct mem_leak_st {
- int (*print_cb) (const char *str, size_t len, void *u);
- void *print_cb_arg;
- int chunks;
- long bytes;
-} MEM_LEAK;
-
-static void print_leak(const MEM *m, MEM_LEAK *l)
-{
- char buf[1024];
- char *bufp = buf;
- size_t len = sizeof(buf), ami_cnt;
- APP_INFO *amip;
- int n;
- struct tm *lcl = NULL;
- /*
- * Convert between CRYPTO_THREAD_ID (which could be anything at all) and
- * a long. This may not be meaningful depending on what CRYPTO_THREAD_ID is
- * but hopefully should give something sensible on most platforms
- */
- union {
- CRYPTO_THREAD_ID tid;
- unsigned long ltid;
- } tid;
- CRYPTO_THREAD_ID ti;
-
- lcl = localtime(&m->time);
- n = BIO_snprintf(bufp, len, "[%02d:%02d:%02d] ",
- lcl->tm_hour, lcl->tm_min, lcl->tm_sec);
- if (n <= 0) {
- bufp[0] = '\0';
- return;
- }
- bufp += n;
- len -= n;
-
- n = BIO_snprintf(bufp, len, "%5lu file=%s, line=%d, ",
- m->order, m->file, m->line);
- if (n <= 0)
- return;
- bufp += n;
- len -= n;
-
- tid.ltid = 0;
- tid.tid = m->threadid;
- n = BIO_snprintf(bufp, len, "thread=%lu, ", tid.ltid);
- if (n <= 0)
- return;
- bufp += n;
- len -= n;
-
- n = BIO_snprintf(bufp, len, "number=%d, address=%p\n", m->num, m->addr);
- if (n <= 0)
- return;
- bufp += n;
- len -= n;
-
- l->print_cb(buf, (size_t)(bufp - buf), l->print_cb_arg);
-
- l->chunks++;
- l->bytes += m->num;
-
- amip = m->app_info;
- ami_cnt = 0;
-
- if (amip) {
- ti = amip->threadid;
-
- do {
- int buf_len;
- int info_len;
-
- ami_cnt++;
- if (ami_cnt >= sizeof(buf) - 1)
- break;
- memset(buf, '>', ami_cnt);
- buf[ami_cnt] = '\0';
- tid.ltid = 0;
- tid.tid = amip->threadid;
- n = BIO_snprintf(buf + ami_cnt, sizeof(buf) - ami_cnt,
- " thread=%lu, file=%s, line=%d, info=\"",
- tid.ltid, amip->file, amip->line);
- if (n <= 0)
- break;
- buf_len = ami_cnt + n;
- 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 {
- n = BIO_snprintf(buf + buf_len, sizeof(buf) - buf_len, "%s",
- amip->info);
- if (n < 0)
- break;
- buf_len += n;
- }
- n = BIO_snprintf(buf + buf_len, sizeof(buf) - buf_len, "\"\n");
- if (n <= 0)
- break;
-
- l->print_cb(buf, buf_len + n, l->print_cb_arg);
-
- amip = amip->next;
- }
- while (amip && CRYPTO_THREAD_compare_id(amip->threadid, ti));
- }
-
-#ifndef OPENSSL_NO_CRYPTO_MDEBUG_BACKTRACE
- {
- size_t i;
- char **strings = backtrace_symbols(m->array, m->array_siz);
-
- for (i = 0; i < m->array_siz; i++)
- fprintf(stderr, "##> %s\n", strings[i]);
- free(strings);
- }
-#endif
-}
-
-IMPLEMENT_LHASH_DOALL_ARG_CONST(MEM, MEM_LEAK);
-
-int CRYPTO_mem_leaks_cb(int (*cb) (const char *str, size_t len, void *u),
- void *u)
-{
- MEM_LEAK ml;
-
- /* Ensure all resources are released */
- OPENSSL_cleanup();
-
- if (!RUN_ONCE(&memdbg_init, do_memdbg_init))
- return -1;
-
- CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_DISABLE);
-
- ml.print_cb = cb;
- ml.print_cb_arg = u;
- ml.bytes = 0;
- ml.chunks = 0;
- if (mh != NULL)
- lh_MEM_doall_MEM_LEAK(mh, print_leak, &ml);
-
- if (ml.chunks != 0) {
- char buf[256];
-
- BIO_snprintf(buf, sizeof(buf), "%ld bytes leaked in %d chunks\n",
- ml.bytes, ml.chunks);
- cb(buf, strlen(buf), u);
- } 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.)
- */
- int old_mh_mode;
-
- CRYPTO_THREAD_write_lock(memdbg_lock);
-
- /*
- * avoid deadlock when lh_free() uses CRYPTO_mem_debug_free(), which uses
- * mem_check_on
- */
- old_mh_mode = mh_mode;
- mh_mode = CRYPTO_MEM_CHECK_OFF;
-
- lh_MEM_free(mh);
- mh = NULL;
-
- mh_mode = old_mh_mode;
- CRYPTO_THREAD_unlock(memdbg_lock);
- }
- CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_OFF);
-
- /* Clean up locks etc */
- CRYPTO_THREAD_cleanup_local(&appinfokey);
- CRYPTO_THREAD_lock_free(memdbg_lock);
- CRYPTO_THREAD_lock_free(long_memdbg_lock);
- memdbg_lock = NULL;
- long_memdbg_lock = NULL;
-
- return ml.chunks == 0 ? 1 : 0;
-}
-
-static int print_bio(const char *str, size_t len, void *b)
-{
- return BIO_write((BIO *)b, str, len);
-}
-
-int CRYPTO_mem_leaks(BIO *b)
-{
- /*
- * OPENSSL_cleanup() will free the ex_data locks so we can't have any
- * ex_data hanging around
- */
- bio_free_ex_data(b);
-
- return CRYPTO_mem_leaks_cb(print_bio, b);
-}
-
-# ifndef OPENSSL_NO_STDIO
-int CRYPTO_mem_leaks_fp(FILE *fp)
-{
- BIO *b;
- int ret;
-
- /*
- * 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!!
- */
- CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_DISABLE);
- b = BIO_new(BIO_s_file());
- CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_ENABLE);
- if (b == NULL)
- return -1;
- BIO_set_fp(b, fp, BIO_NOCLOSE);
- ret = CRYPTO_mem_leaks_cb(print_bio, b);
- BIO_free(b);
- return ret;
-}
-# endif
-
-#endif
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