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https://github.com/isc-projects/bind9.git
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091d738c72
Remove the complicated mechanism that could be (in theory) used by external libraries to register new categories and modules with statically defined lists in <isc/log.h>. This is similar to what we have done for <isc/result.h> result codes. All the libraries are now internal to BIND 9, so we don't need to provide a mechanism to register extra categories and modules.
117 lines
2.3 KiB
C
117 lines
2.3 KiB
C
/*
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* Copyright (C) Internet Systems Consortium, Inc. ("ISC")
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*
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* SPDX-License-Identifier: MPL-2.0
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, you can obtain one at https://mozilla.org/MPL/2.0/.
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*
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* See the COPYRIGHT file distributed with this work for additional
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* information regarding copyright ownership.
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*/
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/*! \file */
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#include <stdlib.h>
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#include <string.h>
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#ifdef HAVE_BACKTRACE_SYMBOLS
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#include <execinfo.h>
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#endif /* HAVE_BACKTRACE_SYMBOLS */
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#include <isc/backtrace.h>
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#include <isc/log.h>
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#include <isc/result.h>
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#include <isc/util.h>
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#if HAVE_BACKTRACE_SYMBOLS
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int
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isc_backtrace(void **addrs, int maxaddrs) {
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int n;
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/*
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* Validate the arguments: intentionally avoid using REQUIRE().
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* See notes in backtrace.h.
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*/
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if (addrs == NULL || maxaddrs <= 0) {
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return (-1);
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}
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/*
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* backtrace(3) includes this function itself in the address array,
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* which should be eliminated from the returned sequence.
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*/
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n = backtrace(addrs, maxaddrs);
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if (n < 2) {
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return (-1);
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}
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n--;
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memmove(addrs, &addrs[1], sizeof(addrs[0]) * n);
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return (n);
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}
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char **
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isc_backtrace_symbols(void *const *buffer, int size) {
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return (backtrace_symbols(buffer, size));
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}
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void
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isc_backtrace_symbols_fd(void *const *buffer, int size, int fd) {
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backtrace_symbols_fd(buffer, size, fd);
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}
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void
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isc_backtrace_log(isc_logcategory_t category, isc_logmodule_t module,
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int level) {
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void *tracebuf[ISC_BACKTRACE_MAXFRAME];
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int nframes;
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char **strs;
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nframes = isc_backtrace(tracebuf, ISC_BACKTRACE_MAXFRAME);
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if (nframes <= 0) {
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return;
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}
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strs = isc_backtrace_symbols(tracebuf, nframes);
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if (strs == NULL) {
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return;
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}
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for (int i = 0; i < nframes; i++) {
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isc_log_write(category, module, level, "%s", strs[i]);
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}
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}
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#else /* HAVE_BACKTRACE_SYMBOLS */
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int
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isc_backtrace(void **addrs, int maxaddrs) {
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UNUSED(addrs);
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UNUSED(maxaddrs);
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return (-1);
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}
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char **
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isc_backtrace_symbols(void *const *buffer, int size) {
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UNUSED(buffer);
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UNUSED(size);
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return (NULL);
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}
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void
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isc_backtrace_symbols_fd(void *const *buffer, int size, int fd) {
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UNUSED(buffer);
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UNUSED(size);
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UNUSED(fd);
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}
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void
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isc_backtrace_log(isc_logcategory_t category, isc_logmodule_t module,
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int level) {
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UNUSED(category);
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UNUSED(module);
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UNUSED(level);
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}
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#endif /* HAVE_BACKTRACE_SYMBOLS */
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