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/*

 * Project: S.Ha.R.K.

 *

 * Coordinators:

 *   Giorgio Buttazzo    <giorgio@sssup.it>

 *   Paolo Gai           <pj@gandalf.sssup.it>

 *

 * Authors     :

 *   Paolo Gai           <pj@gandalf.sssup.it>

 *   (see the web pages for full authors list)

 *

 * ReTiS Lab (Scuola Superiore S.Anna - Pisa - Italy)

 *

 * http://www.sssup.it

 * http://retis.sssup.it

 * http://shark.sssup.it

 */

/**

 ------------

 CVS :        $Id: exchand.c,v 1.9 2005-01-08 14:48:59 pj Exp $

 File:        $File$

 Revision:    $Revision: 1.9 $

 Last update: $Date: 2005-01-08 14:48:59 $

 ------------

**/

/*

 * Copyright (C) 2000-2003 Paolo Gai

 *

 * 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, write to the Free Software

 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

 *

 */

#include <kernel/kern.h>

#include <stdlib.h>

#include <string.h>

#include <tracer.h>

static int             myflag;

static siginfo_t       myinfo;

static struct timespec mytime;

static void thehandler(int signo, siginfo_t *info, void *extra);

static void theend(void *arg);

const char *const _sys_exclist[] = {

  "not used",

  "not used",

  "invalid kill of a task with a shadow pointer set",          /* 2 */

  "cleanup push: no more cleanups handlers",

  "invalid operation for a task",

  "not used",

  "no more OSLib events posted (see oslib/kl/event.c)",

  "deadline miss",

  "wcet violation",

  "task activated at a wrong time (too early?)",

  "mutex owner killed",                                        /* 10 */

  "SRP: invalid lock",

  "Dummy task: invalid operation",

  "Sporadic Server: invalid replenishment",

  "ARP: table full",

  "Netbuff: init",

  "Netbuff: get",

  "Netbuff: already free",

  "Netbuff: release",

  "UDP: Bad checksum"

};

#define SHUTDOWN_BUFFER 1000

static char shutdown_message_buffer[SHUTDOWN_BUFFER];

static int myflag_shutdown = 0;

/*

   This exception handler should be good for text applications that do NOT

   use graphics

*/

int set_default_exception_handler(void)

{

  struct sigaction action;

  int i;

  myflag = 0;

  for(i=0;i<SHUTDOWN_BUFFER;i++) shutdown_message_buffer[i] = 0;

  sys_atrunlevel(theend, NULL, RUNLEVEL_AFTER_EXIT);

  /* Init the standard S.Ha.R.K. exception handler */

  action.sa_flags = SA_SIGINFO;            /* Set the signal action */

  action.sa_sigaction = thehandler;

  action.sa_handler = 0;

  sigfillset(&action.sa_mask); /* we block all the other signals... */

  return sigaction(SIGHEXC, &action, NULL); /* set the signal */

}

int remove_default_exception_handler(void)

{

  struct sigaction action;

  action.sa_flags = 0;

  action.sa_sigaction = NULL;

  action.sa_handler = SIG_IGN;

  sigfillset(&action.sa_mask);

  return sigaction(SIGHEXC, &action, NULL); /* set the signal */

}

int sys_shutdown_message(char *fmt,...)

{

  char temp[100];

  va_list parms;

  int result = -1;

  myflag_shutdown = 1;

  va_start(parms,fmt);

  result = vsprintf(temp,fmt,parms);

  va_end(parms);

  if ((strlen(shutdown_message_buffer) + strlen(temp)) < SHUTDOWN_BUFFER)

        strcat(shutdown_message_buffer,temp);

  return(result);

}

static void thehandler(int signo, siginfo_t *info, void *extra)

{

  if (!myflag) {

    myflag = 1;

    myinfo = *info;

    sys_gettime(&mytime),

    exit(AHEXC);

  }

}

static void theend(void *arg)

{

  if (myflag) {

    cprintf("S.Ha.R.K. Exception raised!!!\n");

    cprintf("Time (s:ns)     :%ld:%ld\n", mytime.tv_sec, mytime.tv_nsec);

    cprintf("Exception number:%d (%s)\n", myinfo.si_value.sival_int,

            _sys_exclist[myinfo.si_value.sival_int]);

    cprintf("PID             :%d (%s)\n", myinfo.si_task,

            proc_table[myinfo.si_task].name);

    cprintf("Avail time      : %d\n", proc_table[myinfo.si_task].avail_time);

  }

  if (myflag_shutdown) {

    cprintf("\nShutdown message:\n%s\n", shutdown_message_buffer);

  }

}