/* Obtain a backtrace and print it.
   Copyright (C) 1991-2020 Free Software Foundation, Inc.

   This program is free software; you can redistribute it and/or
   modify it under the terms of the GNU General Public License
   as published by the Free Software Foundation; either version 2
   of the License, or (at your option) any later version.

   This program 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 General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, see <https://www.gnu.org/licenses/>.
*/

#include <execinfo.h>
#include <stdio.h>
#include <stdlib.h>

/* Obtain a backtrace and print it to @code{stdout}. */
void
print_trace (void)
{
  void *array[10];
  char **strings;
  int size, i;

  size = backtrace (array, 10);
  strings = backtrace_symbols (array, size);
  if (strings != NULL)
  {

    printf ("Obtained %d stack frames.\n", size);
    for (i = 0; i < size; i++)
      printf ("%s\n", strings[i]);
  }

  free (strings);
}

/* A dummy function to make the backtrace more interesting. */
void
dummy_function (void)
{
  print_trace ();
}

int
main (void)
{
  dummy_function ();
  return 0;
}