manual/examples/execinfo.c

   1 /* Obtain a backtrace and print it.
   2    Copyright (C) 1991-2019 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 <http://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   size_t size;
  28   char **strings;
  29   size_t i;
  30
  31   size = backtrace (array, 10);
  32   strings = backtrace_symbols (array, size);
  33
  34   printf ("Obtained %zd stack frames.\n", size);
  35
  36   for (i = 0; i < size; i++)
  37      printf ("%s\n", strings[i]);
  38
  39   free (strings);
  40 }
  41
  42 /* A dummy function to make the backtrace more interesting. */
  43 void
  44 dummy_function (void)
  45 {
  46   print_trace ();
  47 }
  48
  49 int
  50 main (void)
  51 {
  52   dummy_function ();
  53   return 0;
  54 }