WebSVN - shark - Blame - Rev 1621 - /shark/branches/xen/tracer/oldtrace/trcdfix.c

Rev	Author	Line No.	Line
352	giacomo	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	* Massimiliano Giorgi <massy@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
1063	tullio	19	/*
		20	* This program is free software; you can redistribute it and/or modify
		21	* it under the terms of the GNU General Public License as published by
		22	* the Free Software Foundation; either version 2 of the License, or
		23	* (at your option) any later version.
		24	*
		25	* This program is distributed in the hope that it will be useful,
		26	* but WITHOUT ANY WARRANTY; without even the implied warranty of
		27	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
		28	* GNU General Public License for more details.
		29	*
		30	* You should have received a copy of the GNU General Public License
		31	* along with this program; if not, write to the Free Software
		32	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
		33	*
		34	*/
		35
352	giacomo	36	#include <ll/sys/types.h>
1621	fabio	37	#include <arch/stdlib.h>
352	giacomo	38
		39	#include <kernel/func.h>
		40	#include <kernel/mem.h>
		41	#include <kernel/log.h>
		42
		43	#include <types.h>
		44	#include <trace.h>
		45	#include <queues.h>
		46
		47	#include <ll/i386/x-dos.h>
		48
		49	/* this file implement a fixed queue, that is simply an array that
		50	is filled with the events until it is full. After that, all the other
		51	events are discarded. It uses the DOSFS Filesystem to write all the data
		52
		53	This file is derived from the trcfixed.c file; I used a different file
		54	because including trcfixed.c in the executable would have implied the
		55	linking of all the filesystem...
		56	*/
		57
		58
		59
		60
		61	typedef struct TAGfixed_queue_t {
		62	int size;
		63	int index;
		64	char *filename;
		65	int uniq;
		66
		67	trc_event_t table[0];
		68	/* Yes, 0!... the elements are allocated
		69	in a dirty way into the kern_alloc into fixed_create */
		70	} dosfs_fixed_queue_t;
		71
		72	/* This function simply return an event to fill (only if the fixed table
		73	is not yet full) */
		74	static trc_event_t dosfs_fixed_get(dosfs_fixed_queue_t queue)
		75	{
		76	if (queue->index>=queue->size) return NULL;
		77	return &queue->table[queue->index++];
		78	}
		79
		80	/* since get returns the correct event address,
		81	the post function does nothing... */
		82	static int dosfs_fixed_post(dosfs_fixed_queue_t *queue)
		83	{
		84	return 0;
		85	}
		86
		87	static TRC_FIXED_PARMS defaultargs;
		88	static int once=0;
		89
		90	static void dosfs_fixed_flush(void *arg);
		91
		92	static int dosfs_fixed_create(trc_queue_t queue, TRC_FIXED_PARMS args)
		93	{
		94	dosfs_fixed_queue_t *ptr;
		95
		96	/* initialize the default arguments for the fixed queue */
		97	if (!once) {
		98	/* well... this func is called when the system is not running! */
		99	once=1;
		100	trc_fixed_default_parms(defaultargs);
		101	}
		102	if (args==NULL) args=&defaultargs;
		103
		104	/* allocate the fixed queue data structure plus the array of events */
		105	ptr=(dosfs_fixed_queue_t*)kern_alloc(sizeof(dosfs_fixed_queue_t)+
		106	sizeof(trc_event_t)*(args->size+1));
		107	if (ptr==NULL) return -1;
		108
		109	/* set the current queue pointers and data */
		110	queue->get=(trc_event_t()(void*))dosfs_fixed_get;
		111	queue->post=(int()(void))dosfs_fixed_post;
		112	queue->data=ptr;
		113
		114	ptr->size=args->size;
		115	ptr->index=0;
		116	ptr->filename=args->filename;
		117
		118	/* prepare for shutdown ;-) */
		119	sys_atrunlevel(dosfs_fixed_flush, (void *)ptr, RUNLEVEL_AFTER_EXIT);
		120
		121	return 0;
		122	}
		123
		124	static void dosfs_fixed_flush(void *arg)
		125	{
		126	DOS_FILE *f;
		127	dosfs_fixed_queue_t queue = (dosfs_fixed_queue_t )arg;
		128
		129	char pathname[100]; /* it should be PATH_MAX, but we do not use the
		130	filesystem, so the symbol is not defined */
		131
		132	if (queue->filename==NULL) trc_create_name("fix",queue->uniq,pathname);
		133	else trc_create_name(queue->filename,0,pathname);
		134
		135	printk(KERN_DEBUG "tracer flush index= %d pathname=%s\n",
		136	queue->index, pathname);
		137
		138	f = DOS_fopen(pathname,"w");
		139
		140	DOS_fwrite(queue->table,1,queue->index*sizeof(trc_event_t),f);
		141
		142	DOS_fclose(f);
		143
		144	}
		145
		146	static int dosfs_fixed_activate(dosfs_fixed_queue_t *queue, int uniq)
		147	{
		148	queue->uniq=uniq;
		149	return 0;
		150	}
		151
		152	static int dosfs_fixed_terminate(dosfs_fixed_queue_t *queue)
		153	{
		154	return 0;
		155	}
		156
		157	int trc_register_dosfs_fixed_queue(void)
		158	{
		159	int res;
		160
		161	res=trc_register_queuetype(TRC_DOSFS_FIXED_QUEUE,
		162	(int()(trc_queue_t,void*))dosfs_fixed_create,
		163	(int()(void,int))dosfs_fixed_activate,
		164	(int()(void))dosfs_fixed_terminate
		165	);
		166
		167	if (res!=0) printk(KERN_WARNING "can't register tracer DOSFS fixed queue");
		168	return res;
		169	}

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(root)/shark/branches/xen/tracer/oldtrace/trcdfix.c - Rev 1621