common/backtrace.c

   1 /*
   2  * common/backtrace.c - Backtrace handling functions
   3  *
   4  * Copyright © 2009 Julien Danjou <julien@danjou.info>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License along
  17  * with this program; if not, write to the Free Software Foundation, Inc.,
  18  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  19  *
  20  */
  21
  22 #include "config.h"
  23 #include "common/backtrace.h"
  24
  25 #ifdef HAS_EXECINFO
  26 #include <execinfo.h>
  27 #endif
  28
  29 #define MAX_STACK_SIZE 32
  30
  31 /** Get a backtrace.
  32   * \param buf The buffer to fill with backtrace.
  33   */
  34 void
  35 backtrace_get(buffer_t *buf)
  36 {
  37     buffer_init(buf);
  38
  39 #ifdef HAS_EXECINFO
  40     void *stack[MAX_STACK_SIZE];
  41     char **bt;
  42     int stack_size;
  43
  44     stack_size = backtrace(stack, countof(stack));
  45     bt = backtrace_symbols(stack, stack_size);
  46
  47     if(bt)
  48     {
  49         for(int i = 0; i < stack_size; i++)
  50         {
  51             if(i > 0)
  52                 buffer_addsl(buf, "\n");
  53             buffer_adds(buf, bt[i]);
  54         }
  55         p_delete(&bt);
  56     }
  57     else
  58 #endif
  59         buffer_addsl(buf, "Cannot get backtrace symbols.");
  60 }
  61
  62 // vim: filetype=c:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:textwidth=80