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/* Return list with names for address in backtrace.
Copyright (C) 1998, 1999, 2000, 2001 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include <assert.h>
#include <execinfo.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ldsodefs.h>
#if __ELF_NATIVE_CLASS == 32
# define WORD_WIDTH 8
#else
/* We assyme 64bits. */
# define WORD_WIDTH 16
#endif
char **
__backtrace_symbols (array, size)
void *const *array;
int size;
{
Dl_info info[size];
int status[size];
int cnt;
size_t total = 0;
char **result;
/* Fill in the information we can get from `dladdr'. */
for (cnt = 0; cnt < size; ++cnt)
{
status[cnt] = _dl_addr (array[cnt], &info[cnt]);
if (status[cnt] && info[cnt].dli_fname && info[cnt].dli_fname[0] != '\0')
/* We have some info, compute the length of the string which will be
"<file-name>(<sym-name>) [+offset]. */
total += (strlen (info[cnt].dli_fname ?: "")
+ (info[cnt].dli_sname
? strlen (info[cnt].dli_sname) + 3 + WORD_WIDTH + 3
: 1)
+ WORD_WIDTH + 5);
else
total += 5 + WORD_WIDTH;
}
/* Allocate memory for the result. */
result = (char **) malloc (size * sizeof (char *) + total);
if (result != NULL)
{
char *last = (char *) (result + size);
for (cnt = 0; cnt < size; ++cnt)
{
result[cnt] = last;
if (status[cnt] && info[cnt].dli_fname
&& info[cnt].dli_fname[0] != '\0')
{
char buf[20];
if (array[cnt] >= (void *) info[cnt].dli_saddr)
sprintf (buf, "+%#lx",
(unsigned long)(array[cnt] - info[cnt].dli_saddr));
else
sprintf (buf, "-%#lx",
(unsigned long)(info[cnt].dli_saddr - array[cnt]));
last += 1 + sprintf (last, "%s%s%s%s%s[%p]",
info[cnt].dli_fname ?: "",
info[cnt].dli_sname ? "(" : "",
info[cnt].dli_sname ?: "",
info[cnt].dli_sname ? buf : "",
info[cnt].dli_sname ? ") " : " ",
array[cnt]);
}
else
last += 1 + sprintf (last, "[%p]", array[cnt]);
}
assert (last <= (char *) result + size * sizeof (char *) + total);
}
return result;
}
weak_alias (__backtrace_symbols, backtrace_symbols)
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