2 * Copyright 2016-2018 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the OpenSSL license (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
11 #include "internal/cryptlib_int.h"
12 #include <openssl/err.h>
13 #include "internal/rand_int.h"
14 #include "internal/bio.h"
15 #include <openssl/evp.h>
16 #include "internal/evp_int.h"
17 #include "internal/conf.h"
18 #include "internal/async.h"
19 #include "internal/engine.h"
20 #include "internal/comp.h"
21 #include "internal/err.h"
22 #include "internal/err_int.h"
23 #include "internal/objects.h"
26 #include "internal/thread_once.h"
27 #include "internal/dso_conf.h"
28 #include "internal/dso.h"
29 #include "internal/store.h"
31 static int stopped = 0;
34 * Since per-thread-specific-data destructors are not universally
35 * available, i.e. not on Windows, only below CRYPTO_THREAD_LOCAL key
36 * is assumed to have destructor associated. And then an effort is made
37 * to call this single destructor on non-pthread platform[s].
39 * Initial value is "impossible". It is used as guard value to shortcut
40 * destructor for threads terminating before libcrypto is initialized or
41 * after it's de-initialized. Access to the key doesn't have to be
42 * serialized for the said threads, because they didn't use libcrypto
43 * and it doesn't matter if they pick "impossible" or derefernce real
44 * key value and pull NULL past initialization in the first thread that
45 * intends to use libcrypto.
49 CRYPTO_THREAD_LOCAL value;
50 } destructor_key = { -1 };
52 static void ossl_init_thread_stop(struct thread_local_inits_st *locals);
54 static void ossl_init_thread_destructor(void *local)
56 ossl_init_thread_stop((struct thread_local_inits_st *)local);
59 static struct thread_local_inits_st *ossl_init_get_thread_local(int alloc)
61 struct thread_local_inits_st *local =
62 CRYPTO_THREAD_get_local(&destructor_key.value);
66 && (local = OPENSSL_zalloc(sizeof(*local))) != NULL
67 && !CRYPTO_THREAD_set_local(&destructor_key.value, local)) {
72 CRYPTO_THREAD_set_local(&destructor_key.value, NULL);
78 typedef struct ossl_init_stop_st OPENSSL_INIT_STOP;
79 struct ossl_init_stop_st {
80 void (*handler)(void);
81 OPENSSL_INIT_STOP *next;
84 static OPENSSL_INIT_STOP *stop_handlers = NULL;
85 static CRYPTO_RWLOCK *init_lock = NULL;
87 static CRYPTO_ONCE base = CRYPTO_ONCE_STATIC_INIT;
88 static int base_inited = 0;
89 DEFINE_RUN_ONCE_STATIC(ossl_init_base)
91 CRYPTO_THREAD_LOCAL key;
93 #ifdef OPENSSL_INIT_DEBUG
94 fprintf(stderr, "OPENSSL_INIT: ossl_init_base: Setting up stop handlers\n");
96 #ifndef OPENSSL_NO_CRYPTO_MDEBUG
97 ossl_malloc_setup_failures();
99 if (!CRYPTO_THREAD_init_local(&key, ossl_init_thread_destructor))
101 if ((init_lock = CRYPTO_THREAD_lock_new()) == NULL)
103 OPENSSL_cpuid_setup();
105 destructor_key.value = key;
110 #ifdef OPENSSL_INIT_DEBUG
111 fprintf(stderr, "OPENSSL_INIT: ossl_init_base not ok!\n");
113 CRYPTO_THREAD_lock_free(init_lock);
116 CRYPTO_THREAD_cleanup_local(&key);
120 static CRYPTO_ONCE register_atexit = CRYPTO_ONCE_STATIC_INIT;
121 DEFINE_RUN_ONCE_STATIC(ossl_init_register_atexit)
123 # ifdef OPENSSL_INIT_DEBUG
124 fprintf(stderr, "OPENSSL_INIT: ossl_init_register_atexit()\n");
126 #ifndef OPENSSL_SYS_UEFI
127 if (atexit(OPENSSL_cleanup) != 0)
134 DEFINE_RUN_ONCE_STATIC_ALT(ossl_init_no_register_atexit,
135 ossl_init_register_atexit)
137 #ifdef OPENSSL_INIT_DEBUG
138 fprintf(stderr, "OPENSSL_INIT: ossl_init_no_register_atexit ok!\n");
140 /* Do nothing in this case */
144 static CRYPTO_ONCE load_crypto_nodelete = CRYPTO_ONCE_STATIC_INIT;
145 DEFINE_RUN_ONCE_STATIC(ossl_init_load_crypto_nodelete)
147 #ifdef OPENSSL_INIT_DEBUG
148 fprintf(stderr, "OPENSSL_INIT: ossl_init_load_crypto_nodelete()\n");
150 #if !defined(OPENSSL_NO_DSO) && !defined(OPENSSL_USE_NODELETE)
153 HMODULE handle = NULL;
156 /* We don't use the DSO route for WIN32 because there is a better way */
157 ret = GetModuleHandleEx(GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS
158 | GET_MODULE_HANDLE_EX_FLAG_PIN,
159 (void *)&base_inited, &handle);
161 # ifdef OPENSSL_INIT_DEBUG
162 fprintf(stderr, "OPENSSL_INIT: obtained DSO reference? %s\n",
163 (ret == TRUE ? "No!" : "Yes."));
165 return (ret == TRUE) ? 1 : 0;
169 * Deliberately leak a reference to ourselves. This will force the library
170 * to remain loaded until the atexit() handler is run at process exit.
176 if (!err_shelve_state(&err))
179 dso = DSO_dsobyaddr(&base_inited, DSO_FLAG_NO_UNLOAD_ON_FREE);
180 # ifdef OPENSSL_INIT_DEBUG
181 fprintf(stderr, "OPENSSL_INIT: obtained DSO reference? %s\n",
182 (dso == NULL ? "No!" : "Yes."));
184 * In case of No!, it is uncertain our exit()-handlers can still be
185 * called. After dlclose() the whole library might have been unloaded
190 err_unshelve_state(err);
198 static CRYPTO_ONCE load_crypto_strings = CRYPTO_ONCE_STATIC_INIT;
199 static int load_crypto_strings_inited = 0;
200 DEFINE_RUN_ONCE_STATIC(ossl_init_load_crypto_strings)
204 * OPENSSL_NO_AUTOERRINIT is provided here to prevent at compile time
205 * pulling in all the error strings during static linking
207 #if !defined(OPENSSL_NO_ERR) && !defined(OPENSSL_NO_AUTOERRINIT)
208 # ifdef OPENSSL_INIT_DEBUG
209 fprintf(stderr, "OPENSSL_INIT: ossl_init_load_crypto_strings: "
210 "err_load_crypto_strings_int()\n");
212 ret = err_load_crypto_strings_int();
213 load_crypto_strings_inited = 1;
218 DEFINE_RUN_ONCE_STATIC_ALT(ossl_init_no_load_crypto_strings,
219 ossl_init_load_crypto_strings)
221 /* Do nothing in this case */
225 static CRYPTO_ONCE add_all_ciphers = CRYPTO_ONCE_STATIC_INIT;
226 DEFINE_RUN_ONCE_STATIC(ossl_init_add_all_ciphers)
229 * OPENSSL_NO_AUTOALGINIT is provided here to prevent at compile time
230 * pulling in all the ciphers during static linking
232 #ifndef OPENSSL_NO_AUTOALGINIT
233 # ifdef OPENSSL_INIT_DEBUG
234 fprintf(stderr, "OPENSSL_INIT: ossl_init_add_all_ciphers: "
235 "openssl_add_all_ciphers_int()\n");
237 openssl_add_all_ciphers_int();
242 DEFINE_RUN_ONCE_STATIC_ALT(ossl_init_no_add_all_ciphers,
243 ossl_init_add_all_ciphers)
249 static CRYPTO_ONCE add_all_digests = CRYPTO_ONCE_STATIC_INIT;
250 DEFINE_RUN_ONCE_STATIC(ossl_init_add_all_digests)
253 * OPENSSL_NO_AUTOALGINIT is provided here to prevent at compile time
254 * pulling in all the ciphers during static linking
256 #ifndef OPENSSL_NO_AUTOALGINIT
257 # ifdef OPENSSL_INIT_DEBUG
258 fprintf(stderr, "OPENSSL_INIT: ossl_init_add_all_digests: "
259 "openssl_add_all_digests()\n");
261 openssl_add_all_digests_int();
266 DEFINE_RUN_ONCE_STATIC_ALT(ossl_init_no_add_all_digests,
267 ossl_init_add_all_digests)
273 static CRYPTO_ONCE config = CRYPTO_ONCE_STATIC_INIT;
274 static int config_inited = 0;
275 static const char *appname;
276 DEFINE_RUN_ONCE_STATIC(ossl_init_config)
278 #ifdef OPENSSL_INIT_DEBUG
280 "OPENSSL_INIT: ossl_init_config: openssl_config(%s)\n",
281 appname == NULL ? "NULL" : appname);
283 openssl_config_int(appname);
287 DEFINE_RUN_ONCE_STATIC_ALT(ossl_init_no_config, ossl_init_config)
289 #ifdef OPENSSL_INIT_DEBUG
291 "OPENSSL_INIT: ossl_init_config: openssl_no_config_int()\n");
293 openssl_no_config_int();
298 static CRYPTO_ONCE async = CRYPTO_ONCE_STATIC_INIT;
299 static int async_inited = 0;
300 DEFINE_RUN_ONCE_STATIC(ossl_init_async)
302 #ifdef OPENSSL_INIT_DEBUG
303 fprintf(stderr, "OPENSSL_INIT: ossl_init_async: async_init()\n");
311 #ifndef OPENSSL_NO_ENGINE
312 static CRYPTO_ONCE engine_openssl = CRYPTO_ONCE_STATIC_INIT;
313 DEFINE_RUN_ONCE_STATIC(ossl_init_engine_openssl)
315 # ifdef OPENSSL_INIT_DEBUG
316 fprintf(stderr, "OPENSSL_INIT: ossl_init_engine_openssl: "
317 "engine_load_openssl_int()\n");
319 engine_load_openssl_int();
322 # ifndef OPENSSL_NO_DEVCRYPTOENG
323 static CRYPTO_ONCE engine_devcrypto = CRYPTO_ONCE_STATIC_INIT;
324 DEFINE_RUN_ONCE_STATIC(ossl_init_engine_devcrypto)
326 # ifdef OPENSSL_INIT_DEBUG
327 fprintf(stderr, "OPENSSL_INIT: ossl_init_engine_devcrypto: "
328 "engine_load_devcrypto_int()\n");
330 engine_load_devcrypto_int();
335 # ifndef OPENSSL_NO_RDRAND
336 static CRYPTO_ONCE engine_rdrand = CRYPTO_ONCE_STATIC_INIT;
337 DEFINE_RUN_ONCE_STATIC(ossl_init_engine_rdrand)
339 # ifdef OPENSSL_INIT_DEBUG
340 fprintf(stderr, "OPENSSL_INIT: ossl_init_engine_rdrand: "
341 "engine_load_rdrand_int()\n");
343 engine_load_rdrand_int();
347 static CRYPTO_ONCE engine_dynamic = CRYPTO_ONCE_STATIC_INIT;
348 DEFINE_RUN_ONCE_STATIC(ossl_init_engine_dynamic)
350 # ifdef OPENSSL_INIT_DEBUG
351 fprintf(stderr, "OPENSSL_INIT: ossl_init_engine_dynamic: "
352 "engine_load_dynamic_int()\n");
354 engine_load_dynamic_int();
357 # ifndef OPENSSL_NO_STATIC_ENGINE
358 # if !defined(OPENSSL_NO_HW) && !defined(OPENSSL_NO_HW_PADLOCK)
359 static CRYPTO_ONCE engine_padlock = CRYPTO_ONCE_STATIC_INIT;
360 DEFINE_RUN_ONCE_STATIC(ossl_init_engine_padlock)
362 # ifdef OPENSSL_INIT_DEBUG
363 fprintf(stderr, "OPENSSL_INIT: ossl_init_engine_padlock: "
364 "engine_load_padlock_int()\n");
366 engine_load_padlock_int();
370 # if defined(OPENSSL_SYS_WIN32) && !defined(OPENSSL_NO_CAPIENG)
371 static CRYPTO_ONCE engine_capi = CRYPTO_ONCE_STATIC_INIT;
372 DEFINE_RUN_ONCE_STATIC(ossl_init_engine_capi)
374 # ifdef OPENSSL_INIT_DEBUG
375 fprintf(stderr, "OPENSSL_INIT: ossl_init_engine_capi: "
376 "engine_load_capi_int()\n");
378 engine_load_capi_int();
382 # if !defined(OPENSSL_NO_AFALGENG)
383 static CRYPTO_ONCE engine_afalg = CRYPTO_ONCE_STATIC_INIT;
384 DEFINE_RUN_ONCE_STATIC(ossl_init_engine_afalg)
386 # ifdef OPENSSL_INIT_DEBUG
387 fprintf(stderr, "OPENSSL_INIT: ossl_init_engine_afalg: "
388 "engine_load_afalg_int()\n");
390 engine_load_afalg_int();
397 #ifndef OPENSSL_NO_COMP
398 static CRYPTO_ONCE zlib = CRYPTO_ONCE_STATIC_INIT;
400 static int zlib_inited = 0;
401 DEFINE_RUN_ONCE_STATIC(ossl_init_zlib)
403 /* Do nothing - we need to know about this for the later cleanup */
409 static void ossl_init_thread_stop(struct thread_local_inits_st *locals)
411 /* Can't do much about this */
416 #ifdef OPENSSL_INIT_DEBUG
417 fprintf(stderr, "OPENSSL_INIT: ossl_init_thread_stop: "
418 "async_delete_thread_state()\n");
420 async_delete_thread_state();
423 if (locals->err_state) {
424 #ifdef OPENSSL_INIT_DEBUG
425 fprintf(stderr, "OPENSSL_INIT: ossl_init_thread_stop: "
426 "err_delete_thread_state()\n");
428 err_delete_thread_state();
432 #ifdef OPENSSL_INIT_DEBUG
433 fprintf(stderr, "OPENSSL_INIT: ossl_init_thread_stop: "
434 "drbg_delete_thread_state()\n");
436 drbg_delete_thread_state();
439 OPENSSL_free(locals);
442 void OPENSSL_thread_stop(void)
444 if (destructor_key.sane != -1)
445 ossl_init_thread_stop(ossl_init_get_thread_local(0));
448 int ossl_init_thread_start(uint64_t opts)
450 struct thread_local_inits_st *locals;
452 if (!OPENSSL_init_crypto(0, NULL))
455 locals = ossl_init_get_thread_local(1);
460 if (opts & OPENSSL_INIT_THREAD_ASYNC) {
461 #ifdef OPENSSL_INIT_DEBUG
462 fprintf(stderr, "OPENSSL_INIT: ossl_init_thread_start: "
463 "marking thread for async\n");
468 if (opts & OPENSSL_INIT_THREAD_ERR_STATE) {
469 #ifdef OPENSSL_INIT_DEBUG
470 fprintf(stderr, "OPENSSL_INIT: ossl_init_thread_start: "
471 "marking thread for err_state\n");
473 locals->err_state = 1;
476 if (opts & OPENSSL_INIT_THREAD_RAND) {
477 #ifdef OPENSSL_INIT_DEBUG
478 fprintf(stderr, "OPENSSL_INIT: ossl_init_thread_start: "
479 "marking thread for rand\n");
487 void OPENSSL_cleanup(void)
489 OPENSSL_INIT_STOP *currhandler, *lasthandler;
490 CRYPTO_THREAD_LOCAL key;
492 /* If we've not been inited then no need to deinit */
496 /* Might be explicitly called and also by atexit */
502 * Thread stop may not get automatically called by the thread library for
503 * the very last thread in some situations, so call it directly.
505 ossl_init_thread_stop(ossl_init_get_thread_local(0));
507 currhandler = stop_handlers;
508 while (currhandler != NULL) {
509 currhandler->handler();
510 lasthandler = currhandler;
511 currhandler = currhandler->next;
512 OPENSSL_free(lasthandler);
514 stop_handlers = NULL;
516 CRYPTO_THREAD_lock_free(init_lock);
520 * We assume we are single-threaded for this function, i.e. no race
521 * conditions for the various "*_inited" vars below.
524 #ifndef OPENSSL_NO_COMP
526 #ifdef OPENSSL_INIT_DEBUG
527 fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
528 "comp_zlib_cleanup_int()\n");
530 comp_zlib_cleanup_int();
535 # ifdef OPENSSL_INIT_DEBUG
536 fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
542 if (load_crypto_strings_inited) {
543 #ifdef OPENSSL_INIT_DEBUG
544 fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
545 "err_free_strings_int()\n");
547 err_free_strings_int();
550 key = destructor_key.value;
551 destructor_key.sane = -1;
552 CRYPTO_THREAD_cleanup_local(&key);
554 #ifdef OPENSSL_INIT_DEBUG
555 fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
556 "rand_cleanup_int()\n");
557 fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
558 "conf_modules_free_int()\n");
559 #ifndef OPENSSL_NO_ENGINE
560 fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
561 "engine_cleanup_int()\n");
563 fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
564 "crypto_cleanup_all_ex_data_int()\n");
565 fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
566 "bio_sock_cleanup_int()\n");
567 fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
569 fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
570 "evp_cleanup_int()\n");
571 fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
572 "obj_cleanup_int()\n");
573 fprintf(stderr, "OPENSSL_INIT: OPENSSL_cleanup: "
577 * Note that cleanup order is important:
578 * - rand_cleanup_int could call an ENGINE's RAND cleanup function so
579 * must be called before engine_cleanup_int()
580 * - ENGINEs use CRYPTO_EX_DATA and therefore, must be cleaned up
581 * before the ex data handlers are wiped in CRYPTO_cleanup_all_ex_data().
582 * - conf_modules_free_int() can end up in ENGINE code so must be called
583 * before engine_cleanup_int()
584 * - ENGINEs and additional EVP algorithms might use added OIDs names so
585 * obj_cleanup_int() must be called last
588 rand_drbg_cleanup_int();
589 conf_modules_free_int();
590 #ifndef OPENSSL_NO_ENGINE
591 engine_cleanup_int();
593 ossl_store_cleanup_int();
594 crypto_cleanup_all_ex_data_int();
600 CRYPTO_secure_malloc_done();
606 * If this function is called with a non NULL settings value then it must be
607 * called prior to any threads making calls to any OpenSSL functions,
608 * i.e. passing a non-null settings value is assumed to be single-threaded.
610 int OPENSSL_init_crypto(uint64_t opts, const OPENSSL_INIT_SETTINGS *settings)
613 if (!(opts & OPENSSL_INIT_BASE_ONLY))
614 CRYPTOerr(CRYPTO_F_OPENSSL_INIT_CRYPTO, ERR_R_INIT_FAIL);
618 if (!RUN_ONCE(&base, ossl_init_base))
621 if ((opts & OPENSSL_INIT_NO_ATEXIT) != 0) {
622 if (!RUN_ONCE_ALT(®ister_atexit, ossl_init_no_register_atexit,
623 ossl_init_register_atexit))
625 } else if (!RUN_ONCE(®ister_atexit, ossl_init_register_atexit)) {
629 if (!(opts & OPENSSL_INIT_BASE_ONLY)
630 && !RUN_ONCE(&load_crypto_nodelete,
631 ossl_init_load_crypto_nodelete))
634 if ((opts & OPENSSL_INIT_NO_LOAD_CRYPTO_STRINGS)
635 && !RUN_ONCE_ALT(&load_crypto_strings,
636 ossl_init_no_load_crypto_strings,
637 ossl_init_load_crypto_strings))
640 if ((opts & OPENSSL_INIT_LOAD_CRYPTO_STRINGS)
641 && !RUN_ONCE(&load_crypto_strings, ossl_init_load_crypto_strings))
644 if ((opts & OPENSSL_INIT_NO_ADD_ALL_CIPHERS)
645 && !RUN_ONCE_ALT(&add_all_ciphers, ossl_init_no_add_all_ciphers,
646 ossl_init_add_all_ciphers))
649 if ((opts & OPENSSL_INIT_ADD_ALL_CIPHERS)
650 && !RUN_ONCE(&add_all_ciphers, ossl_init_add_all_ciphers))
653 if ((opts & OPENSSL_INIT_NO_ADD_ALL_DIGESTS)
654 && !RUN_ONCE_ALT(&add_all_digests, ossl_init_no_add_all_digests,
655 ossl_init_add_all_digests))
658 if ((opts & OPENSSL_INIT_ADD_ALL_DIGESTS)
659 && !RUN_ONCE(&add_all_digests, ossl_init_add_all_digests))
662 if ((opts & OPENSSL_INIT_ATFORK)
663 && !openssl_init_fork_handlers())
666 if ((opts & OPENSSL_INIT_NO_LOAD_CONFIG)
667 && !RUN_ONCE_ALT(&config, ossl_init_no_config, ossl_init_config))
670 if (opts & OPENSSL_INIT_LOAD_CONFIG) {
672 CRYPTO_THREAD_write_lock(init_lock);
673 appname = (settings == NULL) ? NULL : settings->appname;
674 ret = RUN_ONCE(&config, ossl_init_config);
675 CRYPTO_THREAD_unlock(init_lock);
680 if ((opts & OPENSSL_INIT_ASYNC)
681 && !RUN_ONCE(&async, ossl_init_async))
684 #ifndef OPENSSL_NO_ENGINE
685 if ((opts & OPENSSL_INIT_ENGINE_OPENSSL)
686 && !RUN_ONCE(&engine_openssl, ossl_init_engine_openssl))
688 # if !defined(OPENSSL_NO_HW) && !defined(OPENSSL_NO_DEVCRYPTOENG)
689 if ((opts & OPENSSL_INIT_ENGINE_CRYPTODEV)
690 && !RUN_ONCE(&engine_devcrypto, ossl_init_engine_devcrypto))
693 # ifndef OPENSSL_NO_RDRAND
694 if ((opts & OPENSSL_INIT_ENGINE_RDRAND)
695 && !RUN_ONCE(&engine_rdrand, ossl_init_engine_rdrand))
698 if ((opts & OPENSSL_INIT_ENGINE_DYNAMIC)
699 && !RUN_ONCE(&engine_dynamic, ossl_init_engine_dynamic))
701 # ifndef OPENSSL_NO_STATIC_ENGINE
702 # if !defined(OPENSSL_NO_HW) && !defined(OPENSSL_NO_HW_PADLOCK)
703 if ((opts & OPENSSL_INIT_ENGINE_PADLOCK)
704 && !RUN_ONCE(&engine_padlock, ossl_init_engine_padlock))
707 # if defined(OPENSSL_SYS_WIN32) && !defined(OPENSSL_NO_CAPIENG)
708 if ((opts & OPENSSL_INIT_ENGINE_CAPI)
709 && !RUN_ONCE(&engine_capi, ossl_init_engine_capi))
712 # if !defined(OPENSSL_NO_AFALGENG)
713 if ((opts & OPENSSL_INIT_ENGINE_AFALG)
714 && !RUN_ONCE(&engine_afalg, ossl_init_engine_afalg))
718 if (opts & (OPENSSL_INIT_ENGINE_ALL_BUILTIN
719 | OPENSSL_INIT_ENGINE_OPENSSL
720 | OPENSSL_INIT_ENGINE_AFALG)) {
721 ENGINE_register_all_complete();
725 #ifndef OPENSSL_NO_COMP
726 if ((opts & OPENSSL_INIT_ZLIB)
727 && !RUN_ONCE(&zlib, ossl_init_zlib))
734 int OPENSSL_atexit(void (*handler)(void))
736 OPENSSL_INIT_STOP *newhand;
738 #if !defined(OPENSSL_NO_DSO) && !defined(OPENSSL_USE_NODELETE)
745 handlersym.func = handler;
748 HMODULE handle = NULL;
752 * We don't use the DSO route for WIN32 because there is a better
755 ret = GetModuleHandleEx(GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS
756 | GET_MODULE_HANDLE_EX_FLAG_PIN,
757 handlersym.sym, &handle);
764 * Deliberately leak a reference to the handler. This will force the
765 * library/code containing the handler to remain loaded until we run the
766 * atexit handler. If -znodelete has been used then this is
773 dso = DSO_dsobyaddr(handlersym.sym, DSO_FLAG_NO_UNLOAD_ON_FREE);
774 # ifdef OPENSSL_INIT_DEBUG
776 "OPENSSL_INIT: OPENSSL_atexit: obtained DSO reference? %s\n",
777 (dso == NULL ? "No!" : "Yes."));
778 /* See same code above in ossl_init_base() for an explanation. */
787 if ((newhand = OPENSSL_malloc(sizeof(*newhand))) == NULL) {
788 CRYPTOerr(CRYPTO_F_OPENSSL_ATEXIT, ERR_R_MALLOC_FAILURE);
792 newhand->handler = handler;
793 newhand->next = stop_handlers;
794 stop_handlers = newhand;
799 #ifdef OPENSSL_SYS_UNIX
801 * The following three functions are for OpenSSL developers. This is
802 * where we set/reset state across fork (called via pthread_atfork when
803 * it exists, or manually by the application when it doesn't).
805 * WARNING! If you put code in either OPENSSL_fork_parent or
806 * OPENSSL_fork_child, you MUST MAKE SURE that they are async-signal-
807 * safe. See this link, for example:
808 * http://man7.org/linux/man-pages/man7/signal-safety.7.html
811 void OPENSSL_fork_prepare(void)
815 void OPENSSL_fork_parent(void)
819 void OPENSSL_fork_child(void)