1  /* Obtain a backtrace and print it.
       2     Copyright (C) 1991-2023 Free Software Foundation, Inc.
       3  
       4     This program is free software; you can redistribute it and/or
       5     modify it under the terms of the GNU General Public License
       6     as published by the Free Software Foundation; either version 2
       7     of the License, or (at your option) any later version.
       8  
       9     This program is distributed in the hope that it will be useful,
      10     but WITHOUT ANY WARRANTY; without even the implied warranty of
      11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      12     GNU General Public License for more details.
      13  
      14     You should have received a copy of the GNU General Public License
      15     along with this program; if not, see <https://www.gnu.org/licenses/>.
      16  */
      17  
      18  #include <execinfo.h>
      19  #include <stdio.h>
      20  #include <stdlib.h>
      21  
      22  /* Obtain a backtrace and print it to @code{stdout}. */
      23  void
      24  print_trace (void)
      25  {
      26    void *array[10];
      27    char **strings;
      28    int size, i;
      29  
      30    size = backtrace (array, 10);
      31    strings = backtrace_symbols (array, size);
      32    if (strings != NULL)
      33    {
      34  
      35      printf ("Obtained %d stack frames.\n", size);
      36      for (i = 0; i < size; i++)
      37        printf ("%s\n", strings[i]);
      38    }
      39  
      40    free (strings);
      41  }
      42  
      43  /* A dummy function to make the backtrace more interesting. */
      44  void
      45  dummy_function (void)
      46  {
      47    print_trace ();
      48  }
      49  
      50  int
      51  main (void)
      52  {
      53    dummy_function ();
      54    return 0;
      55  }