101 lines
2.9 KiB
C
101 lines
2.9 KiB
C
/* Return list with names for address in backtrace.
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Copyright (C) 1998, 1999, 2000 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include <execinfo.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <ldsodefs.h>
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#if __ELF_NATIVE_CLASS == 32
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# define WORD_WIDTH 8
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#else
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/* We assyme 64bits. */
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# define WORD_WIDTH 16
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#endif
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char **
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__backtrace_symbols (array, size)
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void *const *array;
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int size;
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{
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Dl_info info[size];
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int status[size];
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int cnt;
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size_t total = 0;
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char **result;
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/* Fill in the information we can get from `dladdr'. */
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for (cnt = 0; cnt < size; ++cnt)
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{
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status[cnt] = _dl_addr (array[cnt], &info[cnt]);
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if (status[cnt] && info[cnt].dli_fname && info[cnt].dli_fname[0] != '\0')
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/* We have some info, compute the length of the string which will be
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"<fct-name>(<sym-name>)[+offset]. */
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total += (strlen (info[cnt].dli_fname ?: "")
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+ (info[cnt].dli_sname
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? strlen (info[cnt].dli_sname) + 3 + WORD_WIDTH + 3
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: 1)
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+ WORD_WIDTH + 5);
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else
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total += 5 + WORD_WIDTH;
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}
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/* Allocate memory for the result. */
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result = malloc (size * sizeof (char *) + total);
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if (result != NULL)
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{
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char *last = (char *) (result + size);
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for (cnt = 0; cnt < size; ++cnt)
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{
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result[cnt] = last;
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if (status[cnt] && info[cnt].dli_fname
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&& info[cnt].dli_fname[0] != '\0')
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{
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char buf[20];
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if (array[cnt] >= (void *) info[cnt].dli_saddr)
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sprintf (buf, "+%#lx",
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(unsigned long)(array[cnt] - info[cnt].dli_saddr));
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else
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sprintf (buf, "-%#lx",
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(unsigned long)(info[cnt].dli_saddr - array[cnt]));
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last += 1 + sprintf (last, "%s%s%s%s%s[%p]",
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info[cnt].dli_fname ?: "",
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info[cnt].dli_sname ? "(" : "",
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info[cnt].dli_sname ?: "",
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info[cnt].dli_sname ? buf : "",
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info[cnt].dli_sname ? ") " : " ",
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array[cnt]);
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}
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else
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last += 1 + sprintf (last, "[%p]", array[cnt]);
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}
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}
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return result;
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}
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weak_alias (__backtrace_symbols, backtrace_symbols)
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