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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 1.3 2004-02-10 17:50:03 giacomo Exp $

 File:        $File$

 Revision:    $Revision: 1.3 $

 Last update: $Date: 2004-02-10 17:50:03 $

 ------------

**/

/*

 * 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 <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"

};

static char shutdown_message_buffer[500];

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;

  myflag = 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 sys_shutdown_message(char *fmt,...)

{

  va_list parms;

  int result = -1;

  if (!myflag_shutdown) {

    myflag_shutdown = 1;

    va_start(parms,fmt);

    result = vsprintf(shutdown_message_buffer,fmt,parms);

    va_end(parms);

  }

  return(result);

}

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

{

  if (!myflag) {

    myflag = 1;

    myinfo = *info;

    sys_gettime(&mytime),

    sys_abort(AHEXC);

  }

}

extern void *StartTracerBuffer; // Buffer Start 0

extern void *EndTracerBuffer; // Buffer End 4

extern void *LastBeforeEndTracerBuffer; //8

extern void *CurrentTracerBuffer; //The Actual Write Point For The Next Event 12

extern void *FirstTracerBuffer; //The First Valid Event 16

extern int TracerActive; //20

extern int TracerOutputType; //24

extern unsigned long long TracerEventsRecorded; //28

extern unsigned int TracerEventsPresent; //36

static void theend(void *arg)

{

  #ifdef __NEW_TRACER__

    void *save_tracer_pointer;

  #endif

  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);

    #ifdef __NEW_TRACER__

      save_tracer_pointer = malloc(48);

      *(void **)(save_tracer_pointer) = StartTracerBuffer; // Buffer Start 0

      *(void **)(save_tracer_pointer+4) = EndTracerBuffer; // Buffer End 4

      *(void **)(save_tracer_pointer+8) = LastBeforeEndTracerBuffer; //8

      *(void **)(save_tracer_pointer+12) = CurrentTracerBuffer; //The Actual Write Point For The Next Event 12

      *(void **)(save_tracer_pointer+16) = FirstTracerBuffer; //The First Valid Event 16

      *(int *)(save_tracer_pointer+20) = 0; //20

      *(int *)(save_tracer_pointer+24) = TRACER_UDP_OUTPUT; //24

      *(unsigned long long *)(save_tracer_pointer+28) = TracerEventsRecorded; //28

      *(unsigned int *)(save_tracer_pointer+36) = TracerEventsPresent; //36 

      cprintf("Dumper Magic Number = %u\n",(int)save_tracer_pointer);

    #endif

  }

  if (myflag_shutdown) {

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

  }

}