ASTERISK_REGISTER_FILE no longer has any purpose so this commit removes all traces of it. Previously exported symbols removed: * __ast_register_file * __ast_unregister_file * ast_complete_source_filename This also removes the mtx_prof static variable that was declared when MTX_PROFILE was enabled. This variable was only used in lock.c so it is now initialized in that file only. ASTERISK-26480 #close Change-Id: I1074af07d71f9e159c48ef36631aa432c86f9966
225 lines
5.5 KiB
C
225 lines
5.5 KiB
C
/*
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* Asterisk -- An open source telephony toolkit.
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*
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* Copyright (C) 1999 - 2013, Digium, Inc.
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*
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* Matt Jordan <mjordan@digium.com>
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*
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* See http://www.asterisk.org for more information about
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* the Asterisk project. Please do not directly contact
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* any of the maintainers of this project for assistance;
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* the project provides a web site, mailing lists and IRC
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* channels for your use.
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*
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* This program is free software, distributed under the terms of
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* the GNU General Public License Version 2. See the LICENSE file
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* at the top of the source tree.
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*/
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/*! \file
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* \brief Asterisk backtrace generation
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*
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* This file provides backtrace generation utilities
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*/
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/*** MODULEINFO
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<support_level>core</support_level>
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***/
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#include "asterisk.h"
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#include "asterisk/backtrace.h"
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#include "asterisk/utils.h"
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#include "asterisk/strings.h"
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#ifdef HAVE_BKTR
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#include <execinfo.h>
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#if defined(HAVE_DLADDR) && defined(HAVE_BFD) && defined(BETTER_BACKTRACES)
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#include <dlfcn.h>
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#include <bfd.h>
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#endif
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struct ast_bt *__ast_bt_create(void)
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{
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struct ast_bt *bt = ast_std_calloc(1, sizeof(*bt));
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if (!bt) {
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return NULL;
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}
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bt->alloced = 1;
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ast_bt_get_addresses(bt);
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return bt;
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}
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int __ast_bt_get_addresses(struct ast_bt *bt)
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{
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bt->num_frames = backtrace(bt->addresses, AST_MAX_BT_FRAMES);
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return 0;
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}
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void *__ast_bt_destroy(struct ast_bt *bt)
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{
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if (bt && bt->alloced) {
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ast_std_free(bt);
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}
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return NULL;
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}
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char **__ast_bt_get_symbols(void **addresses, size_t num_frames)
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{
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char **strings;
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#if defined(BETTER_BACKTRACES)
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int stackfr;
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bfd *bfdobj; /* bfd.h */
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Dl_info dli; /* dlfcn.h */
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long allocsize;
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asymbol **syms = NULL; /* bfd.h */
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bfd_vma offset; /* bfd.h */
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const char *lastslash;
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asection *section;
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const char *file, *func;
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unsigned int line;
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char address_str[128];
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char msg[1024];
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size_t strings_size;
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size_t *eachlen;
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#endif
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#if defined(BETTER_BACKTRACES)
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strings_size = num_frames * sizeof(*strings);
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eachlen = ast_std_calloc(num_frames, sizeof(*eachlen));
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strings = ast_std_calloc(num_frames, sizeof(*strings));
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if (!eachlen || !strings) {
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ast_std_free(eachlen);
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ast_std_free(strings);
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return NULL;
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}
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for (stackfr = 0; stackfr < num_frames; stackfr++) {
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int found = 0, symbolcount;
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msg[0] = '\0';
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if (!dladdr(addresses[stackfr], &dli)) {
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continue;
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}
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if (strcmp(dli.dli_fname, "asterisk") == 0) {
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char asteriskpath[256];
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if (!(dli.dli_fname = ast_utils_which("asterisk", asteriskpath, sizeof(asteriskpath)))) {
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/* This will fail to find symbols */
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dli.dli_fname = "asterisk";
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}
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}
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lastslash = strrchr(dli.dli_fname, '/');
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if ((bfdobj = bfd_openr(dli.dli_fname, NULL)) &&
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bfd_check_format(bfdobj, bfd_object) &&
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(allocsize = bfd_get_symtab_upper_bound(bfdobj)) > 0 &&
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(syms = ast_std_malloc(allocsize)) &&
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(symbolcount = bfd_canonicalize_symtab(bfdobj, syms))) {
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if (bfdobj->flags & DYNAMIC) {
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offset = addresses[stackfr] - dli.dli_fbase;
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} else {
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offset = addresses[stackfr] - (void *) 0;
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}
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for (section = bfdobj->sections; section; section = section->next) {
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if (!bfd_get_section_flags(bfdobj, section) & SEC_ALLOC ||
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section->vma > offset ||
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section->size + section->vma < offset) {
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continue;
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}
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if (!bfd_find_nearest_line(bfdobj, section, syms, offset - section->vma, &file, &func, &line)) {
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continue;
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}
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/* file can possibly be null even with a success result from bfd_find_nearest_line */
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file = file ? file : "";
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/* Stack trace output */
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found++;
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if ((lastslash = strrchr(file, '/'))) {
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const char *prevslash;
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for (prevslash = lastslash - 1; *prevslash != '/' && prevslash >= file; prevslash--) {
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}
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if (prevslash >= file) {
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lastslash = prevslash;
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}
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}
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if (dli.dli_saddr == NULL) {
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address_str[0] = '\0';
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} else {
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snprintf(address_str, sizeof(address_str), " (%p+%lX)",
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dli.dli_saddr,
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(unsigned long) (addresses[stackfr] - dli.dli_saddr));
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}
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snprintf(msg, sizeof(msg), "%s:%u %s()%s",
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lastslash ? lastslash + 1 : file, line,
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S_OR(func, "???"),
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address_str);
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break; /* out of section iteration */
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}
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}
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if (bfdobj) {
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bfd_close(bfdobj);
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ast_std_free(syms);
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}
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/* Default output, if we cannot find the information within BFD */
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if (!found) {
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if (dli.dli_saddr == NULL) {
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address_str[0] = '\0';
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} else {
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snprintf(address_str, sizeof(address_str), " (%p+%lX)",
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dli.dli_saddr,
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(unsigned long) (addresses[stackfr] - dli.dli_saddr));
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}
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snprintf(msg, sizeof(msg), "%s %s()%s",
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lastslash ? lastslash + 1 : dli.dli_fname,
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S_OR(dli.dli_sname, "<unknown>"),
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address_str);
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}
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if (!ast_strlen_zero(msg)) {
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char **tmp;
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eachlen[stackfr] = strlen(msg) + 1;
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if (!(tmp = ast_std_realloc(strings, strings_size + eachlen[stackfr]))) {
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ast_std_free(strings);
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strings = NULL;
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break; /* out of stack frame iteration */
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}
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strings = tmp;
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strings[stackfr] = (char *) strings + strings_size;
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strcpy(strings[stackfr], msg);/* Safe since we just allocated the room. */
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strings_size += eachlen[stackfr];
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}
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}
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if (strings) {
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/* Recalculate the offset pointers because of the reallocs. */
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strings[0] = (char *) strings + num_frames * sizeof(*strings);
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for (stackfr = 1; stackfr < num_frames; stackfr++) {
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strings[stackfr] = strings[stackfr - 1] + eachlen[stackfr - 1];
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}
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}
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ast_std_free(eachlen);
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#else /* !defined(BETTER_BACKTRACES) */
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strings = backtrace_symbols(addresses, num_frames);
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#endif /* defined(BETTER_BACKTRACES) */
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return strings;
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}
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#endif /* HAVE_BKTR */
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