Source to bsd/sys/trace.h


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/*
 * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
 *
 * @[email protected]
 * 
 * "Portions Copyright (c) 1999 Apple Computer, Inc.  All Rights
 * Reserved.  This file contains Original Code and/or Modifications of
 * Original Code as defined in and that are subject to the Apple Public
 * Source License Version 1.0 (the 'License').  You may not use this file
 * except in compliance with the License.  Please obtain a copy of the
 * License at http://www.apple.com/publicsource and read it before using
 * this file.
 * 
 * The Original Code and all software distributed under the License are
 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
 * License for the specific language governing rights and limitations
 * under the License."
 * 
 * @[email protected]
 */

/* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
/*-
 * Copyright (c) 1982, 1986, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *	@(#)trace.h	8.1 (Berkeley) 6/2/93
 */

#ifndef _SYS_TRACE_H_
#define	_SYS_TRACE_H_

/*
 * File system buffer tracing points; all trace <pack(dev, size), bn>
 */
#define	TR_BREADHIT	0	/* buffer read found in cache */
#define	TR_BREADMISS	1	/* buffer read not in cache */
#define	TR_BWRITE	2	/* buffer written */
#define	TR_BREADHITRA	3	/* buffer read-ahead found in cache */
#define	TR_BREADMISSRA	4	/* buffer read-ahead not in cache */
#define	TR_XFODMISS	5	/* exe fod read */
#define	TR_XFODHIT	6	/* exe fod read */
#define	TR_BRELSE	7	/* brelse */
#define	TR_BREALLOC	8	/* expand/contract a buffer */

/*
 * Memory allocator trace points; all trace the amount of memory involved
 */
#define	TR_MALL		10	/* memory allocated */

/*
 * Paging trace points: all are <vaddr, pid>
 */
#define	TR_INTRANS	20	/* page intransit block */
#define	TR_EINTRANS	21	/* page intransit wait done */
#define	TR_FRECLAIM	22	/* reclaim from free list */
#define	TR_RECLAIM	23	/* reclaim from loop */
#define	TR_XSFREC	24	/* reclaim from free list instead of drum */
#define	TR_XIFREC	25	/* reclaim from free list instead of fsys */
#define	TR_WAITMEM	26	/* wait for memory in pagein */
#define	TR_EWAITMEM	27	/* end memory wait in pagein */
#define	TR_ZFOD		28	/* zfod page fault */
#define	TR_EXFOD	29	/* exec fod page fault */
#define	TR_VRFOD	30	/* vread fod page fault */
#define	TR_CACHEFOD	31	/* fod in file system cache */
#define	TR_SWAPIN	32	/* drum page fault */
#define	TR_PGINDONE	33	/* page in done */
#define	TR_SWAPIO	34	/* swap i/o request arrives */

/*
 * System call trace points.
 */
#define	TR_VADVISE	40	/* vadvise occurred with <arg, pid> */

/*
 * Miscellaneous
 */
#define	TR_STAMP	45	/* user said vtrace(VTR_STAMP, value); */

/*
 * This defines the size of the trace flags array.
 */
#define	TR_NFLAGS	100	/* generous */

#define	TRCSIZ		4096

/*
 * Specifications of the vtrace() system call, which takes one argument.
 */
#define	VTRACE		64+51

#define	VTR_DISABLE	0		/* set a trace flag to 0 */
#define	VTR_ENABLE	1		/* set a trace flag to 1 */
#define	VTR_VALUE	2		/* return value of a trace flag */
#define	VTR_UALARM	3		/* set alarm to go off (sig 16) */
					/* in specified number of hz */
#define	VTR_STAMP	4		/* user specified stamp */

#ifdef _KERNEL
#if TRACE
extern struct	proc *traceproc;
extern int	tracewhich, tracebuf[TRCSIZ];
extern u_int	tracex;
extern char	traceflags[TR_NFLAGS];
#define	pack(v,b)	(((v)->v_mount->mnt_stat.f_fsid.val[0])<<16)|(b)
void microboot(struct timeval * tvp);
#define trace1(a, b, c) { \
	struct timeval t; \
	microboot(&t); \
        tracebuf[tracex++] = t.tv_usec; \
        tracebuf[tracex++] = (a); \
        tracebuf[tracex++] = (b); \
        tracebuf[tracex++] = (c); \
        tracex %= TRCSIZ; \
}
#define	trace(a,b,c) {							\
	if (traceflags[a])						\
		trace1(a,b,c);						\
}
#else
#define	trace(a,b,c)
#endif
#endif /* _KERNEL */
#endif /* !_SYS_TRACE_H_ */