WebSVN - shark - Blame - Rev 567 - /shark/trunk/kernel/exchand.c

Rev	Author	Line No.	Line
38	pj	1	/*
		2	* Project: S.Ha.R.K.
		3	*
		4	* Coordinators:
		5	* Giorgio Buttazzo <giorgio@sssup.it>
		6	* Paolo Gai <pj@gandalf.sssup.it>
		7	*
		8	* Authors :
		9	* Paolo Gai <pj@gandalf.sssup.it>
		10	* (see the web pages for full authors list)
		11	*
		12	* ReTiS Lab (Scuola Superiore S.Anna - Pisa - Italy)
		13	*
		14	* http://www.sssup.it
		15	* http://retis.sssup.it
		16	* http://shark.sssup.it
		17	*/
		18
		19	/**
		20	------------
567	giacomo	21	CVS : $Id: exchand.c,v 1.6 2004-04-18 20:18:21 giacomo Exp $
38	pj	22
		23	File: $File$
567	giacomo	24	Revision: $Revision: 1.6 $
		25	Last update: $Date: 2004-04-18 20:18:21 $
38	pj	26	------------
		27	**/
		28
		29	/*
157	pj	30	* Copyright (C) 2000-2003 Paolo Gai
38	pj	31	*
		32	* This program is free software; you can redistribute it and/or modify
		33	* it under the terms of the GNU General Public License as published by
		34	* the Free Software Foundation; either version 2 of the License, or
		35	* (at your option) any later version.
		36	*
		37	* This program is distributed in the hope that it will be useful,
		38	* but WITHOUT ANY WARRANTY; without even the implied warranty of
		39	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
		40	* GNU General Public License for more details.
		41	*
		42	* You should have received a copy of the GNU General Public License
		43	* along with this program; if not, write to the Free Software
		44	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
		45	*
		46	*/
		47
		48	#include <kernel/kern.h>
445	giacomo	49	#include <stdlib.h>
564	giacomo	50	#include <string.h>
445	giacomo	51	#include <tracer.h>
38	pj	52
		53	static int myflag;
		54	static siginfo_t myinfo;
		55	static struct timespec mytime;
		56
		57	static void thehandler(int signo, siginfo_t info, void extra);
		58	static void theend(void *arg);
		59
157	pj	60	const char *const _sys_exclist[] = {
		61	"not used",
		62	"not used",
		63	"invalid kill of a task with a shadow pointer set", /* 2 */
		64	"cleanup push: no more cleanups handlers",
		65	"invalid operation for a task",
		66	"not used",
		67	"no more OSLib events posted (see oslib/kl/event.c)",
		68	"deadline miss",
		69	"wcet violation",
		70	"task activated at a wrong time (too early?)",
		71	"mutex owner killed", /* 10 */
		72	"SRP: invalid lock",
		73	"Dummy task: invalid operation",
		74	"Sporadic Server: invalid replenishment",
		75	"ARP: table full",
		76	"Netbuff: init",
		77	"Netbuff: get",
		78	"Netbuff: already free",
		79	"Netbuff: release",
		80	"UDP: Bad checksum"
		81	};
		82
		83	static char shutdown_message_buffer[500];
		84	static int myflag_shutdown = 0;
		85
38	pj	86	/*
		87	This exception handler should be good for text applications that do NOT
		88	use graphics
		89	*/
		90	int set_default_exception_handler(void)
		91	{
		92	struct sigaction action;
564	giacomo	93	int i;
38	pj	94
		95	myflag = 0;
		96
564	giacomo	97	for(i=0;i<500;i++) shutdown_message_buffer[i] = 0;
		98
38	pj	99	sys_atrunlevel(theend, NULL, RUNLEVEL_AFTER_EXIT);
		100
		101	/* Init the standard S.Ha.R.K. exception handler */
		102	action.sa_flags = SA_SIGINFO; /* Set the signal action */
		103	action.sa_sigaction = thehandler;
		104	action.sa_handler = 0;
		105	sigfillset(&action.sa_mask); /* we block all the other signals... */
		106
		107	return sigaction(SIGHEXC, &action, NULL); /* set the signal */
		108	}
		109
567	giacomo	110	int remove_default_exception_handler(void)
		111	{
		112	struct sigaction action;
		113
		114	action.sa_flags = SA_SIGINFO;
		115	action.sa_sigaction = NULL;
		116	action.sa_handler = SIG_IGN;
		117	sigfillset(&action.sa_mask);
		118
		119	return sigaction(SIGHEXC, &action, NULL); /* set the signal */
		120	}
		121
157	pj	122	int sys_shutdown_message(char *fmt,...)
		123	{
		124	va_list parms;
		125	int result = -1;
		126
564	giacomo	127	myflag_shutdown = 1;
		128	va_start(parms,fmt);
		129	result = vsprintf(shutdown_message_buffer+strlen(shutdown_message_buffer),fmt,parms);
		130	va_end(parms);
		131
157	pj	132	return(result);
564	giacomo	133
157	pj	134	}
		135
38	pj	136	static void thehandler(int signo, siginfo_t info, void extra)
		137	{
		138	if (!myflag) {
		139	myflag = 1;
		140	myinfo = *info;
		141	sys_gettime(&mytime),
		142	sys_abort(AHEXC);
		143	}
		144	}
		145
		146	static void theend(void *arg)
		147	{
445	giacomo	148
38	pj	149	if (myflag) {
157	pj	150	cprintf("S.Ha.R.K. Exception raised!!!\n");
		151	cprintf("Time (s:ns) :%ld:%ld\n", mytime.tv_sec, mytime.tv_nsec);
		152	cprintf("Exception number:%d (%s)\n", myinfo.si_value.sival_int,
		153	_sys_exclist[myinfo.si_value.sival_int]);
		154	cprintf("PID :%d (%s)\n", myinfo.si_task,
		155	proc_table[myinfo.si_task].name);
		156	cprintf("Avail time : %d\n", proc_table[myinfo.si_task].avail_time);
445	giacomo	157
38	pj	158	}
157	pj	159	if (myflag_shutdown) {
		160	cprintf("\nShutdown message:\n%s\n", shutdown_message_buffer);
		161	}
		162
38	pj	163	}
		164
		165
		166

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