source/lib/fault.c

   1 /*
   2    Unix SMB/Netbios implementation.
   3    Version 1.9.
   4    Critical Fault handling
   5    Copyright (C) Andrew Tridgell 1992-1995
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 2 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program; if not, write to the Free Software
  19    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  20 */
  21
  22 #ifdef LINUX
  23 #define __KERNEL__
  24 #endif
  25
  26 #include "includes.h"
  27 extern int DEBUGLEVEL;
  28
  29
  30 static void (*cont_fn)();
  31
  32
  33 /*******************************************************************
  34 report a fault
  35 ********************************************************************/
  36 static void fault_report(int sig)
  37 {
  38   DEBUG(0,("===============================================================\n"));
  39   DEBUG(0,("INTERNAL ERROR: Signal %d in pid %d (%s)",sig,(int)getpid(),VERSION));
  40   DEBUG(0,("\nPlease read the file BUGS.txt in the distribution\n"));
  41   DEBUG(0,("===============================================================\n"));
  42
  43 #if AJT
  44   ajt_panic();
  45 #endif
  46
  47   if (cont_fn)
  48     {
  49       fault_setup(cont_fn);
  50       cont_fn(NULL);
  51 #ifdef SIGSEGV
  52       signal(SIGSEGV,SIGNAL_CAST SIG_DFL);
  53 #endif
  54 #ifdef SIGBUS
  55       signal(SIGBUS,SIGNAL_CAST SIG_DFL);
  56 #endif
  57       return; /* this should cause a core dump */
  58     }
  59   exit(1);
  60 }
  61
  62 /****************************************************************************
  63 catch serious errors
  64 ****************************************************************************/
  65 static void sig_fault(int sig)
  66 {
  67   fault_report(sig);
  68 }
  69
  70 /*******************************************************************
  71 setup our fault handlers
  72 ********************************************************************/
  73 void fault_setup(void (*fn)())
  74 {
  75   cont_fn = fn;
  76
  77 #ifdef SIGSEGV
  78   signal(SIGSEGV,SIGNAL_CAST sig_fault);
  79 #endif
  80 #ifdef SIGBUS
  81   signal(SIGBUS,SIGNAL_CAST sig_fault);
  82 #endif
  83 }
  84
  85
  86