29b186736c
Previously, error strings were kept in arrays for each subdirectory and err.c would iterate over them all and insert them at init time to a hash table. This means that, even if you have a shared library and lots of processes using that, each process has ~30KB of private memory from building that hash table. This this change, all the error strings are built into a sorted list and are thus static data. This means that processes can share the error information and it actually saves binary space because of all the pointer overhead in the old scheme. Also it saves the time taken building the hash table at startup. This removes support for externally-supplied error string data. Change-Id: Ifca04f335c673a048e1a3e76ff2b69c7264635be
241 lines
8.9 KiB
C
241 lines
8.9 KiB
C
/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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* All rights reserved.
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*
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* This package is an SSL implementation written
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* by Eric Young (eay@cryptsoft.com).
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* The implementation was written so as to conform with Netscapes SSL.
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*
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* This library is free for commercial and non-commercial use as long as
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* the following conditions are aheared to. The following conditions
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* apply to all code found in this distribution, be it the RC4, RSA,
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* lhash, DES, etc., code; not just the SSL code. The SSL documentation
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* included with this distribution is covered by the same copyright terms
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* except that the holder is Tim Hudson (tjh@cryptsoft.com).
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*
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* Copyright remains Eric Young's, and as such any Copyright notices in
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* the code are not to be removed.
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* If this package is used in a product, Eric Young should be given attribution
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* as the author of the parts of the library used.
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* This can be in the form of a textual message at program startup or
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* in documentation (online or textual) provided with the package.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* "This product includes cryptographic software written by
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* Eric Young (eay@cryptsoft.com)"
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* The word 'cryptographic' can be left out if the rouines from the library
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* being used are not cryptographic related :-).
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* 4. If you include any Windows specific code (or a derivative thereof) from
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* the apps directory (application code) you must include an acknowledgement:
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* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
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*
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* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* The licence and distribution terms for any publically available version or
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* derivative of this code cannot be changed. i.e. this code cannot simply be
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* copied and put under another distribution licence
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* [including the GNU Public Licence.]
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*/
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/* ====================================================================
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* Copyright (c) 1998-2006 The OpenSSL Project. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* 3. All advertising materials mentioning features or use of this
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* software must display the following acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
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*
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* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
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* endorse or promote products derived from this software without
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* prior written permission. For written permission, please contact
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* openssl-core@openssl.org.
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*
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* 5. Products derived from this software may not be called "OpenSSL"
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* nor may "OpenSSL" appear in their names without prior written
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* permission of the OpenSSL Project.
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*
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* 6. Redistributions of any form whatsoever must retain the following
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* acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit (http://www.openssl.org/)"
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*
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* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
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* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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* ====================================================================
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*
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* This product includes cryptographic software written by Eric Young
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* (eay@cryptsoft.com). This product includes software written by Tim
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* Hudson (tjh@cryptsoft.com). */
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#include <openssl/err.h>
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#include <assert.h>
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#include <string.h>
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#include <openssl/lhash.h>
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#include <openssl/mem.h>
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DEFINE_LHASH_OF(ERR_STATE);
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DEFINE_LHASH_OF(ERR_STRING_DATA);
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/* state_hash is a map from thread ID to ERR_STATE. It works like thread-local
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* storage. */
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static LHASH_OF(ERR_STATE) *state_hash = NULL;
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/* global_next_library contains the next custom library value to return. */
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static int global_next_library = ERR_NUM_LIBS;
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/* err_state_hash is an lhash hash function for ERR_STATE. */
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static uint32_t err_state_hash(const ERR_STATE *a) {
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return CRYPTO_THREADID_hash(&a->tid);
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}
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/* err_state_cmp is an lhash compare function for ERR_STATE. */
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static int err_state_cmp(const ERR_STATE *a, const ERR_STATE *b) {
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return CRYPTO_THREADID_cmp(&a->tid, &b->tid);
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}
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static ERR_STATE *err_get_state(void) {
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CRYPTO_THREADID tid;
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ERR_STATE pattern, *state, *race_state;
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int insert_result;
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static ERR_STATE fallback;
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CRYPTO_THREADID_current(&tid);
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memset(&pattern, 0, sizeof(pattern));
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CRYPTO_THREADID_cpy(&pattern.tid, &tid);
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CRYPTO_r_lock(CRYPTO_LOCK_ERR);
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if (state_hash == NULL) {
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CRYPTO_r_unlock(CRYPTO_LOCK_ERR);
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CRYPTO_w_lock(CRYPTO_LOCK_ERR);
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if (state_hash == NULL) {
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state_hash = lh_ERR_STATE_new(err_state_hash, err_state_cmp);
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}
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CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
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CRYPTO_r_lock(CRYPTO_LOCK_ERR);
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}
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if (state_hash == NULL) {
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CRYPTO_r_unlock(CRYPTO_LOCK_ERR);
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return NULL;
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}
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state = lh_ERR_STATE_retrieve(state_hash, &pattern);
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CRYPTO_r_unlock(CRYPTO_LOCK_ERR);
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if (state != NULL) {
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return state;
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}
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state = OPENSSL_malloc(sizeof(ERR_STATE));
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if (state == NULL) {
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CRYPTO_r_unlock(CRYPTO_LOCK_ERR);
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/* The other error functions don't cope with a failure to get the error
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* state, so we return a dummy value. */
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return &fallback;
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}
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memset(state, 0, sizeof(ERR_STATE));
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CRYPTO_THREADID_cpy(&state->tid, &tid);
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CRYPTO_w_lock(CRYPTO_LOCK_ERR);
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insert_result = lh_ERR_STATE_insert(state_hash, &race_state, state);
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CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
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if (!insert_result) {
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/* Insertion failed because of malloc failure. */
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OPENSSL_free(state);
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return &fallback;
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}
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/* We cannot have raced with another thread to insert an ERR_STATE because no
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* other thread should be inserting values for this thread. */
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assert(race_state == NULL);
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return state;
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}
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static ERR_STATE *err_release_state(const CRYPTO_THREADID *tid) {
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ERR_STATE pattern, *state;
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CRYPTO_THREADID_cpy(&pattern.tid, tid);
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CRYPTO_r_lock(CRYPTO_LOCK_ERR);
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if (state_hash == NULL) {
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CRYPTO_r_unlock(CRYPTO_LOCK_ERR);
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return NULL;
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}
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state = lh_ERR_STATE_delete(state_hash, &pattern);
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CRYPTO_r_unlock(CRYPTO_LOCK_ERR);
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return state;
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}
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static void err_shutdown(void (*err_state_free_cb)(ERR_STATE*)) {
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CRYPTO_w_lock(CRYPTO_LOCK_ERR);
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if (state_hash) {
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lh_ERR_STATE_doall(state_hash, err_state_free_cb);
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lh_ERR_STATE_free(state_hash);
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state_hash = NULL;
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}
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CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
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}
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static int err_get_next_library(void) {
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int ret;
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CRYPTO_w_lock(CRYPTO_LOCK_ERR);
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ret = global_next_library++;
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CRYPTO_w_unlock(CRYPTO_LOCK_ERR);
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return ret;
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}
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const struct ERR_FNS_st openssl_err_default_impl = {
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err_shutdown,
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err_get_state,
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err_release_state,
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err_get_next_library,
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};
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