2 * Copyright 1995-2018 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
13 #include "internal/cryptlib_int.h"
14 #include "internal/err.h"
15 #include "internal/err_int.h"
16 #include <openssl/err.h>
17 #include <openssl/crypto.h>
18 #include <openssl/buffer.h>
19 #include <openssl/bio.h>
20 #include <openssl/opensslconf.h>
21 #include "internal/thread_once.h"
23 static int err_load_strings(const ERR_STRING_DATA *str);
25 static void ERR_STATE_free(ERR_STATE *s);
26 #ifndef OPENSSL_NO_ERR
27 static ERR_STRING_DATA ERR_str_libraries[] = {
28 {ERR_PACK(ERR_LIB_NONE, 0, 0), "unknown library"},
29 {ERR_PACK(ERR_LIB_SYS, 0, 0), "system library"},
30 {ERR_PACK(ERR_LIB_BN, 0, 0), "bignum routines"},
31 {ERR_PACK(ERR_LIB_RSA, 0, 0), "rsa routines"},
32 {ERR_PACK(ERR_LIB_DH, 0, 0), "Diffie-Hellman routines"},
33 {ERR_PACK(ERR_LIB_EVP, 0, 0), "digital envelope routines"},
34 {ERR_PACK(ERR_LIB_BUF, 0, 0), "memory buffer routines"},
35 {ERR_PACK(ERR_LIB_OBJ, 0, 0), "object identifier routines"},
36 {ERR_PACK(ERR_LIB_PEM, 0, 0), "PEM routines"},
37 {ERR_PACK(ERR_LIB_DSA, 0, 0), "dsa routines"},
38 {ERR_PACK(ERR_LIB_X509, 0, 0), "x509 certificate routines"},
39 {ERR_PACK(ERR_LIB_ASN1, 0, 0), "asn1 encoding routines"},
40 {ERR_PACK(ERR_LIB_CONF, 0, 0), "configuration file routines"},
41 {ERR_PACK(ERR_LIB_CRYPTO, 0, 0), "common libcrypto routines"},
42 {ERR_PACK(ERR_LIB_EC, 0, 0), "elliptic curve routines"},
43 {ERR_PACK(ERR_LIB_ECDSA, 0, 0), "ECDSA routines"},
44 {ERR_PACK(ERR_LIB_ECDH, 0, 0), "ECDH routines"},
45 {ERR_PACK(ERR_LIB_SSL, 0, 0), "SSL routines"},
46 {ERR_PACK(ERR_LIB_BIO, 0, 0), "BIO routines"},
47 {ERR_PACK(ERR_LIB_PKCS7, 0, 0), "PKCS7 routines"},
48 {ERR_PACK(ERR_LIB_X509V3, 0, 0), "X509 V3 routines"},
49 {ERR_PACK(ERR_LIB_PKCS12, 0, 0), "PKCS12 routines"},
50 {ERR_PACK(ERR_LIB_RAND, 0, 0), "random number generator"},
51 {ERR_PACK(ERR_LIB_DSO, 0, 0), "DSO support routines"},
52 {ERR_PACK(ERR_LIB_TS, 0, 0), "time stamp routines"},
53 {ERR_PACK(ERR_LIB_ENGINE, 0, 0), "engine routines"},
54 {ERR_PACK(ERR_LIB_OCSP, 0, 0), "OCSP routines"},
55 {ERR_PACK(ERR_LIB_UI, 0, 0), "UI routines"},
56 {ERR_PACK(ERR_LIB_FIPS, 0, 0), "FIPS routines"},
57 {ERR_PACK(ERR_LIB_CMS, 0, 0), "CMS routines"},
58 {ERR_PACK(ERR_LIB_HMAC, 0, 0), "HMAC routines"},
59 {ERR_PACK(ERR_LIB_CT, 0, 0), "CT routines"},
60 {ERR_PACK(ERR_LIB_ASYNC, 0, 0), "ASYNC routines"},
61 {ERR_PACK(ERR_LIB_KDF, 0, 0), "KDF routines"},
62 {ERR_PACK(ERR_LIB_OSSL_STORE, 0, 0), "STORE routines"},
63 {ERR_PACK(ERR_LIB_SM2, 0, 0), "SM2 routines"},
67 static ERR_STRING_DATA ERR_str_functs[] = {
68 {ERR_PACK(0, SYS_F_FOPEN, 0), "fopen"},
69 {ERR_PACK(0, SYS_F_CONNECT, 0), "connect"},
70 {ERR_PACK(0, SYS_F_GETSERVBYNAME, 0), "getservbyname"},
71 {ERR_PACK(0, SYS_F_SOCKET, 0), "socket"},
72 {ERR_PACK(0, SYS_F_IOCTLSOCKET, 0), "ioctlsocket"},
73 {ERR_PACK(0, SYS_F_BIND, 0), "bind"},
74 {ERR_PACK(0, SYS_F_LISTEN, 0), "listen"},
75 {ERR_PACK(0, SYS_F_ACCEPT, 0), "accept"},
76 # ifdef OPENSSL_SYS_WINDOWS
77 {ERR_PACK(0, SYS_F_WSASTARTUP, 0), "WSAstartup"},
79 {ERR_PACK(0, SYS_F_OPENDIR, 0), "opendir"},
80 {ERR_PACK(0, SYS_F_FREAD, 0), "fread"},
81 {ERR_PACK(0, SYS_F_GETADDRINFO, 0), "getaddrinfo"},
82 {ERR_PACK(0, SYS_F_GETNAMEINFO, 0), "getnameinfo"},
83 {ERR_PACK(0, SYS_F_SETSOCKOPT, 0), "setsockopt"},
84 {ERR_PACK(0, SYS_F_GETSOCKOPT, 0), "getsockopt"},
85 {ERR_PACK(0, SYS_F_GETSOCKNAME, 0), "getsockname"},
86 {ERR_PACK(0, SYS_F_GETHOSTBYNAME, 0), "gethostbyname"},
87 {ERR_PACK(0, SYS_F_FFLUSH, 0), "fflush"},
88 {ERR_PACK(0, SYS_F_OPEN, 0), "open"},
89 {ERR_PACK(0, SYS_F_CLOSE, 0), "close"},
90 {ERR_PACK(0, SYS_F_IOCTL, 0), "ioctl"},
91 {ERR_PACK(0, SYS_F_STAT, 0), "stat"},
92 {ERR_PACK(0, SYS_F_FCNTL, 0), "fcntl"},
93 {ERR_PACK(0, SYS_F_FSTAT, 0), "fstat"},
97 static ERR_STRING_DATA ERR_str_reasons[] = {
98 {ERR_R_SYS_LIB, "system lib"},
99 {ERR_R_BN_LIB, "BN lib"},
100 {ERR_R_RSA_LIB, "RSA lib"},
101 {ERR_R_DH_LIB, "DH lib"},
102 {ERR_R_EVP_LIB, "EVP lib"},
103 {ERR_R_BUF_LIB, "BUF lib"},
104 {ERR_R_OBJ_LIB, "OBJ lib"},
105 {ERR_R_PEM_LIB, "PEM lib"},
106 {ERR_R_DSA_LIB, "DSA lib"},
107 {ERR_R_X509_LIB, "X509 lib"},
108 {ERR_R_ASN1_LIB, "ASN1 lib"},
109 {ERR_R_EC_LIB, "EC lib"},
110 {ERR_R_BIO_LIB, "BIO lib"},
111 {ERR_R_PKCS7_LIB, "PKCS7 lib"},
112 {ERR_R_X509V3_LIB, "X509V3 lib"},
113 {ERR_R_ENGINE_LIB, "ENGINE lib"},
114 {ERR_R_UI_LIB, "UI lib"},
115 {ERR_R_OSSL_STORE_LIB, "STORE lib"},
116 {ERR_R_ECDSA_LIB, "ECDSA lib"},
118 {ERR_R_NESTED_ASN1_ERROR, "nested asn1 error"},
119 {ERR_R_MISSING_ASN1_EOS, "missing asn1 eos"},
121 {ERR_R_FATAL, "fatal"},
122 {ERR_R_MALLOC_FAILURE, "malloc failure"},
123 {ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED,
124 "called a function you should not call"},
125 {ERR_R_PASSED_NULL_PARAMETER, "passed a null parameter"},
126 {ERR_R_INTERNAL_ERROR, "internal error"},
127 {ERR_R_DISABLED, "called a function that was disabled at compile-time"},
128 {ERR_R_INIT_FAIL, "init fail"},
129 {ERR_R_OPERATION_FAIL, "operation fail"},
135 static CRYPTO_ONCE err_init = CRYPTO_ONCE_STATIC_INIT;
136 static int set_err_thread_local;
137 static CRYPTO_THREAD_LOCAL err_thread_local;
139 static CRYPTO_ONCE err_string_init = CRYPTO_ONCE_STATIC_INIT;
140 static CRYPTO_RWLOCK *err_string_lock;
142 static ERR_STRING_DATA *int_err_get_item(const ERR_STRING_DATA *);
148 static LHASH_OF(ERR_STRING_DATA) *int_error_hash = NULL;
149 static int int_err_library_number = ERR_LIB_USER;
151 static unsigned long get_error_values(int inc, int top, const char **file,
152 int *line, const char **data,
155 static unsigned long err_string_data_hash(const ERR_STRING_DATA *a)
157 unsigned long ret, l;
160 ret = l ^ ERR_GET_LIB(l) ^ ERR_GET_FUNC(l);
161 return (ret ^ ret % 19 * 13);
164 static int err_string_data_cmp(const ERR_STRING_DATA *a,
165 const ERR_STRING_DATA *b)
167 if (a->error == b->error)
169 return a->error > b->error ? 1 : -1;
172 static ERR_STRING_DATA *int_err_get_item(const ERR_STRING_DATA *d)
174 ERR_STRING_DATA *p = NULL;
176 CRYPTO_THREAD_read_lock(err_string_lock);
177 p = lh_ERR_STRING_DATA_retrieve(int_error_hash, d);
178 CRYPTO_THREAD_unlock(err_string_lock);
183 #ifndef OPENSSL_NO_ERR
184 # define NUM_SYS_STR_REASONS 127
185 # define LEN_SYS_STR_REASON 32
187 static ERR_STRING_DATA SYS_str_reasons[NUM_SYS_STR_REASONS + 1];
189 * SYS_str_reasons is filled with copies of strerror() results at
190 * initialization. 'errno' values up to 127 should cover all usual errors,
191 * others will be displayed numerically by ERR_error_string. It is crucial
192 * that we have something for each reason code that occurs in
193 * ERR_str_reasons, or bogus reason strings will be returned for SYSerr(),
194 * which always gets an errno value and never one of those 'standard' reason
198 static void build_SYS_str_reasons(void)
200 /* OPENSSL_malloc cannot be used here, use static storage instead */
201 static char strerror_tab[NUM_SYS_STR_REASONS][LEN_SYS_STR_REASON];
205 CRYPTO_THREAD_write_lock(err_string_lock);
207 CRYPTO_THREAD_unlock(err_string_lock);
211 for (i = 1; i <= NUM_SYS_STR_REASONS; i++) {
212 ERR_STRING_DATA *str = &SYS_str_reasons[i - 1];
214 str->error = ERR_PACK(ERR_LIB_SYS, 0, i);
215 if (str->string == NULL) {
216 char (*dest)[LEN_SYS_STR_REASON] = &(strerror_tab[i - 1]);
217 if (openssl_strerror_r(i, *dest, sizeof(*dest)))
220 if (str->string == NULL)
221 str->string = "unknown";
225 * Now we still have SYS_str_reasons[NUM_SYS_STR_REASONS] = {0, NULL}, as
226 * required by ERR_load_strings.
231 CRYPTO_THREAD_unlock(err_string_lock);
232 err_load_strings(SYS_str_reasons);
236 #define err_clear_data(p, i) \
238 if ((p)->err_data_flags[i] & ERR_TXT_MALLOCED) {\
239 OPENSSL_free((p)->err_data[i]); \
240 (p)->err_data[i] = NULL; \
242 (p)->err_data_flags[i] = 0; \
245 #define err_clear(p, i) \
247 err_clear_data(p, i); \
248 (p)->err_flags[i] = 0; \
249 (p)->err_buffer[i] = 0; \
250 (p)->err_file[i] = NULL; \
251 (p)->err_line[i] = -1; \
254 static void ERR_STATE_free(ERR_STATE *s)
260 for (i = 0; i < ERR_NUM_ERRORS; i++) {
261 err_clear_data(s, i);
266 DEFINE_RUN_ONCE_STATIC(do_err_strings_init)
268 if (!OPENSSL_init_crypto(0, NULL))
270 err_string_lock = CRYPTO_THREAD_lock_new();
271 if (err_string_lock == NULL)
273 int_error_hash = lh_ERR_STRING_DATA_new(err_string_data_hash,
274 err_string_data_cmp);
275 if (int_error_hash == NULL) {
276 CRYPTO_THREAD_lock_free(err_string_lock);
277 err_string_lock = NULL;
283 void err_cleanup(void)
285 if (set_err_thread_local != 0)
286 CRYPTO_THREAD_cleanup_local(&err_thread_local);
287 CRYPTO_THREAD_lock_free(err_string_lock);
288 err_string_lock = NULL;
289 lh_ERR_STRING_DATA_free(int_error_hash);
290 int_error_hash = NULL;
294 * Legacy; pack in the library.
296 static void err_patch(int lib, ERR_STRING_DATA *str)
298 unsigned long plib = ERR_PACK(lib, 0, 0);
300 for (; str->error != 0; str++)
305 * Hash in |str| error strings. Assumes the URN_ONCE was done.
307 static int err_load_strings(const ERR_STRING_DATA *str)
309 CRYPTO_THREAD_write_lock(err_string_lock);
310 for (; str->error; str++)
311 (void)lh_ERR_STRING_DATA_insert(int_error_hash,
312 (ERR_STRING_DATA *)str);
313 CRYPTO_THREAD_unlock(err_string_lock);
317 int ERR_load_ERR_strings(void)
319 #ifndef OPENSSL_NO_ERR
320 if (!RUN_ONCE(&err_string_init, do_err_strings_init))
323 err_load_strings(ERR_str_libraries);
324 err_load_strings(ERR_str_reasons);
325 err_patch(ERR_LIB_SYS, ERR_str_functs);
326 err_load_strings(ERR_str_functs);
327 build_SYS_str_reasons();
332 int ERR_load_strings(int lib, ERR_STRING_DATA *str)
334 if (ERR_load_ERR_strings() == 0)
338 err_load_strings(str);
342 int ERR_load_strings_const(const ERR_STRING_DATA *str)
344 if (ERR_load_ERR_strings() == 0)
346 err_load_strings(str);
350 int ERR_unload_strings(int lib, ERR_STRING_DATA *str)
352 if (!RUN_ONCE(&err_string_init, do_err_strings_init))
355 CRYPTO_THREAD_write_lock(err_string_lock);
357 * We don't need to ERR_PACK the lib, since that was done (to
358 * the table) when it was loaded.
360 for (; str->error; str++)
361 (void)lh_ERR_STRING_DATA_delete(int_error_hash, str);
362 CRYPTO_THREAD_unlock(err_string_lock);
367 void err_free_strings_int(void)
369 if (!RUN_ONCE(&err_string_init, do_err_strings_init))
373 /********************************************************/
375 void ERR_put_error(int lib, int func, int reason, const char *file, int line)
381 * In the BS2000-OSD POSIX subsystem, the compiler generates path names
382 * in the form "*POSIX(/etc/passwd)". This dirty hack strips them to
383 * something sensible. @@@ We shouldn't modify a const string, though.
385 if (strncmp(file, "*POSIX(", sizeof("*POSIX(") - 1) == 0) {
388 /* Skip the "*POSIX(" prefix */
389 file += sizeof("*POSIX(") - 1;
390 end = &file[strlen(file) - 1];
393 /* Optional: use the basename of the path only. */
394 if ((end = strrchr(file, '/')) != NULL)
398 es = ERR_get_state();
402 es->top = (es->top + 1) % ERR_NUM_ERRORS;
403 if (es->top == es->bottom)
404 es->bottom = (es->bottom + 1) % ERR_NUM_ERRORS;
405 es->err_flags[es->top] = 0;
406 es->err_buffer[es->top] = ERR_PACK(lib, func, reason);
407 es->err_file[es->top] = file;
408 es->err_line[es->top] = line;
409 err_clear_data(es, es->top);
412 void ERR_clear_error(void)
417 es = ERR_get_state();
421 for (i = 0; i < ERR_NUM_ERRORS; i++) {
424 es->top = es->bottom = 0;
427 unsigned long ERR_get_error(void)
429 return get_error_values(1, 0, NULL, NULL, NULL, NULL);
432 unsigned long ERR_get_error_line(const char **file, int *line)
434 return get_error_values(1, 0, file, line, NULL, NULL);
437 unsigned long ERR_get_error_line_data(const char **file, int *line,
438 const char **data, int *flags)
440 return get_error_values(1, 0, file, line, data, flags);
443 unsigned long ERR_peek_error(void)
445 return get_error_values(0, 0, NULL, NULL, NULL, NULL);
448 unsigned long ERR_peek_error_line(const char **file, int *line)
450 return get_error_values(0, 0, file, line, NULL, NULL);
453 unsigned long ERR_peek_error_line_data(const char **file, int *line,
454 const char **data, int *flags)
456 return get_error_values(0, 0, file, line, data, flags);
459 unsigned long ERR_peek_last_error(void)
461 return get_error_values(0, 1, NULL, NULL, NULL, NULL);
464 unsigned long ERR_peek_last_error_line(const char **file, int *line)
466 return get_error_values(0, 1, file, line, NULL, NULL);
469 unsigned long ERR_peek_last_error_line_data(const char **file, int *line,
470 const char **data, int *flags)
472 return get_error_values(0, 1, file, line, data, flags);
475 static unsigned long get_error_values(int inc, int top, const char **file,
476 int *line, const char **data,
483 es = ERR_get_state();
497 return ERR_R_INTERNAL_ERROR;
500 if (es->bottom == es->top)
503 i = es->top; /* last error */
505 i = (es->bottom + 1) % ERR_NUM_ERRORS; /* first error */
507 ret = es->err_buffer[i];
510 es->err_buffer[i] = 0;
513 if (file != NULL && line != NULL) {
514 if (es->err_file[i] == NULL) {
518 *file = es->err_file[i];
519 *line = es->err_line[i];
525 err_clear_data(es, i);
528 if (es->err_data[i] == NULL) {
533 *data = es->err_data[i];
535 *flags = es->err_data_flags[i];
541 void ERR_error_string_n(unsigned long e, char *buf, size_t len)
543 char lsbuf[64], fsbuf[64], rsbuf[64];
544 const char *ls, *fs, *rs;
545 unsigned long l, f, r;
551 ls = ERR_lib_error_string(e);
553 BIO_snprintf(lsbuf, sizeof(lsbuf), "lib(%lu)", l);
557 fs = ERR_func_error_string(e);
560 BIO_snprintf(fsbuf, sizeof(fsbuf), "func(%lu)", f);
564 rs = ERR_reason_error_string(e);
565 r = ERR_GET_REASON(e);
567 BIO_snprintf(rsbuf, sizeof(rsbuf), "reason(%lu)", r);
571 BIO_snprintf(buf, len, "error:%08lX:%s:%s:%s", e, ls, fs, rs);
572 if (strlen(buf) == len - 1) {
573 /* Didn't fit; use a minimal format. */
574 BIO_snprintf(buf, len, "err:%lx:%lx:%lx:%lx", e, l, f, r);
579 * ERR_error_string_n should be used instead for ret != NULL as
580 * ERR_error_string cannot know how large the buffer is
582 char *ERR_error_string(unsigned long e, char *ret)
584 static char buf[256];
588 ERR_error_string_n(e, ret, (int)sizeof(buf));
592 const char *ERR_lib_error_string(unsigned long e)
594 ERR_STRING_DATA d, *p;
597 if (!RUN_ONCE(&err_string_init, do_err_strings_init)) {
602 d.error = ERR_PACK(l, 0, 0);
603 p = int_err_get_item(&d);
604 return ((p == NULL) ? NULL : p->string);
607 const char *ERR_func_error_string(unsigned long e)
609 ERR_STRING_DATA d, *p;
612 if (!RUN_ONCE(&err_string_init, do_err_strings_init)) {
618 d.error = ERR_PACK(l, f, 0);
619 p = int_err_get_item(&d);
620 return ((p == NULL) ? NULL : p->string);
623 const char *ERR_reason_error_string(unsigned long e)
625 ERR_STRING_DATA d, *p = NULL;
628 if (!RUN_ONCE(&err_string_init, do_err_strings_init)) {
633 r = ERR_GET_REASON(e);
634 d.error = ERR_PACK(l, 0, r);
635 p = int_err_get_item(&d);
637 d.error = ERR_PACK(0, 0, r);
638 p = int_err_get_item(&d);
640 return ((p == NULL) ? NULL : p->string);
643 void err_delete_thread_state(void)
645 ERR_STATE *state = CRYPTO_THREAD_get_local(&err_thread_local);
649 CRYPTO_THREAD_set_local(&err_thread_local, NULL);
650 ERR_STATE_free(state);
653 #if OPENSSL_API_COMPAT < 0x10100000L
654 void ERR_remove_thread_state(void *dummy)
659 #if OPENSSL_API_COMPAT < 0x10000000L
660 void ERR_remove_state(unsigned long pid)
665 DEFINE_RUN_ONCE_STATIC(err_do_init)
667 set_err_thread_local = 1;
668 return CRYPTO_THREAD_init_local(&err_thread_local, NULL);
671 ERR_STATE *ERR_get_state(void)
675 if (!OPENSSL_init_crypto(OPENSSL_INIT_BASE_ONLY, NULL))
678 if (!RUN_ONCE(&err_init, err_do_init))
681 state = CRYPTO_THREAD_get_local(&err_thread_local);
682 if (state == (ERR_STATE*)-1)
686 if (!CRYPTO_THREAD_set_local(&err_thread_local, (ERR_STATE*)-1))
689 if ((state = OPENSSL_zalloc(sizeof(*state))) == NULL) {
690 CRYPTO_THREAD_set_local(&err_thread_local, NULL);
694 if (!ossl_init_thread_start(OPENSSL_INIT_THREAD_ERR_STATE)
695 || !CRYPTO_THREAD_set_local(&err_thread_local, state)) {
696 ERR_STATE_free(state);
697 CRYPTO_THREAD_set_local(&err_thread_local, NULL);
701 /* Ignore failures from these */
702 OPENSSL_init_crypto(OPENSSL_INIT_LOAD_CRYPTO_STRINGS, NULL);
709 * err_shelve_state returns the current thread local error state
710 * and freezes the error module until err_unshelve_state is called.
712 int err_shelve_state(void **state)
714 if (!OPENSSL_init_crypto(OPENSSL_INIT_BASE_ONLY, NULL))
717 if (!RUN_ONCE(&err_init, err_do_init))
720 *state = CRYPTO_THREAD_get_local(&err_thread_local);
721 if (!CRYPTO_THREAD_set_local(&err_thread_local, (ERR_STATE*)-1))
728 * err_unshelve_state restores the error state that was returned
729 * by err_shelve_state previously.
731 void err_unshelve_state(void* state)
733 if (state != (void*)-1)
734 CRYPTO_THREAD_set_local(&err_thread_local, (ERR_STATE*)state);
737 int ERR_get_next_error_library(void)
741 if (!RUN_ONCE(&err_string_init, do_err_strings_init))
744 CRYPTO_THREAD_write_lock(err_string_lock);
745 ret = int_err_library_number++;
746 CRYPTO_THREAD_unlock(err_string_lock);
750 void ERR_set_error_data(char *data, int flags)
755 es = ERR_get_state();
761 err_clear_data(es, i);
762 es->err_data[i] = data;
763 es->err_data_flags[i] = flags;
766 void ERR_add_error_data(int num, ...)
770 ERR_add_error_vdata(num, args);
774 void ERR_add_error_vdata(int num, va_list args)
780 if ((str = OPENSSL_malloc(s + 1)) == NULL) {
781 /* ERRerr(ERR_F_ERR_ADD_ERROR_VDATA, ERR_R_MALLOC_FAILURE); */
787 for (i = 0; i < num; i++) {
788 a = va_arg(args, char *);
794 p = OPENSSL_realloc(str, s + 1);
801 OPENSSL_strlcat(str, a, (size_t)s + 1);
803 ERR_set_error_data(str, ERR_TXT_MALLOCED | ERR_TXT_STRING);
806 int ERR_set_mark(void)
810 es = ERR_get_state();
814 if (es->bottom == es->top)
816 es->err_flags[es->top] |= ERR_FLAG_MARK;
820 int ERR_pop_to_mark(void)
824 es = ERR_get_state();
828 while (es->bottom != es->top
829 && (es->err_flags[es->top] & ERR_FLAG_MARK) == 0) {
830 err_clear(es, es->top);
831 es->top = es->top > 0 ? es->top - 1 : ERR_NUM_ERRORS - 1;
834 if (es->bottom == es->top)
836 es->err_flags[es->top] &= ~ERR_FLAG_MARK;
840 int ERR_clear_last_mark(void)
845 es = ERR_get_state();
850 while (es->bottom != top
851 && (es->err_flags[top] & ERR_FLAG_MARK) == 0) {
852 top = top > 0 ? top - 1 : ERR_NUM_ERRORS - 1;
855 if (es->bottom == top)
857 es->err_flags[top] &= ~ERR_FLAG_MARK;