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/* Return list with names for address in backtrace.
Copyright (C) 1998,1999,2000,2001,2003 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 Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; see the file COPYING.LIB. If
not, see <http://www.gnu.org/licenses/>.
Based on glibc/sysdeps/generic/elf/backtracesyms.c
Copyright (C) 2010 STMicroelectronics Ltd
Author(s): Carmelo Amoroso <carmelo.amoroso@st.com>
* Modified to work with uClibc
- updated headers inclusion
- updated formatting and style
- updated to use dladdr from libdl */
#include <execinfo.h>
#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <dlfcn.h>
#include <link.h> /* required for __ELF_NATIVE_CLASS */
#if __ELF_NATIVE_CLASS == 32
# define WORD_WIDTH 8
#else
/* We assyme 64bits. */
# define WORD_WIDTH 16
#endif
char ** backtrace_symbols (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] = dladdr (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;
}
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