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      1 /*	$NetBSD: trace.h,v 1.12 2017/12/19 18:47:58 kamil Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 1982, 1986, 1993
      5  *	The Regents of the University of California.  All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  * 3. Neither the name of the University nor the names of its contributors
     16  *    may be used to endorse or promote products derived from this software
     17  *    without specific prior written permission.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     29  * SUCH DAMAGE.
     30  *
     31  *	@(#)trace.h	8.1 (Berkeley) 6/2/93
     32  */
     33 
     34 #ifndef _SYS_TRACE_H_
     35 #define _SYS_TRACE_H_
     36 
     37 /*
     38  * File system buffer tracing points; all trace <pack(dev, size), bn>
     39  */
     40 #define	TR_BREADHIT	0	/* buffer read found in cache */
     41 #define	TR_BREADMISS	1	/* buffer read not in cache */
     42 #define	TR_BWRITE	2	/* buffer written */
     43 #define	TR_BREADHITRA	3	/* buffer read-ahead found in cache */
     44 #define	TR_BREADMISSRA	4	/* buffer read-ahead not in cache */
     45 #define	TR_XFODMISS	5	/* exe fod read */
     46 #define	TR_XFODHIT	6	/* exe fod read */
     47 #define	TR_BRELSE	7	/* brelse */
     48 #define	TR_BREALLOC	8	/* expand/contract a buffer */
     49 
     50 /*
     51  * Memory allocator trace points; all trace the amount of memory involved
     52  */
     53 #define	TR_MALL		10	/* memory allocated */
     54 
     55 /*
     56  * Paging trace points: all are <vaddr, pid>
     57  */
     58 #define	TR_INTRANS	20	/* page intransit block */
     59 #define	TR_EINTRANS	21	/* page intransit wait done */
     60 #define	TR_FRECLAIM	22	/* reclaim from free list */
     61 #define	TR_RECLAIM	23	/* reclaim from loop */
     62 #define	TR_XSFREC	24	/* reclaim from free list instead of drum */
     63 #define	TR_XIFREC	25	/* reclaim from free list instead of fsys */
     64 #define	TR_WAITMEM	26	/* wait for memory in pagein */
     65 #define	TR_EWAITMEM	27	/* end memory wait in pagein */
     66 #define	TR_ZFOD		28	/* zfod page fault */
     67 #define	TR_EXFOD	29	/* exec fod page fault */
     68 #define	TR_VRFOD	30	/* vread fod page fault */
     69 #define	TR_CACHEFOD	31	/* fod in file system cache */
     70 #define	TR_SWAPIN	32	/* drum page fault */
     71 #define	TR_PGINDONE	33	/* page in done */
     72 #define	TR_SWAPIO	34	/* swap i/o request arrives */
     73 
     74 /*
     75  * Miscellaneous
     76  */
     77 #define	TR_STAMP	45	/* user said vtrace(VTR_STAMP, value); */
     78 
     79 /*
     80  * This defines the size of the trace flags array.
     81  */
     82 #define	TR_NFLAGS	100	/* generous */
     83 
     84 #define	TRCSIZ		4096
     85 
     86 /*
     87  * Specifications of the vtrace() system call, which takes one argument.
     88  */
     89 #define	VTRACE		64+51
     90 
     91 #define	VTR_DISABLE	0		/* set a trace flag to 0 */
     92 #define	VTR_ENABLE	1		/* set a trace flag to 1 */
     93 #define	VTR_VALUE	2		/* return value of a trace flag */
     94 #define	VTR_UALARM	3		/* set alarm to go off (sig 16) */
     95 					/* in specified number of hz */
     96 #define	VTR_STAMP	4		/* user specified stamp */
     97 
     98 #ifdef _KERNEL
     99 #ifdef TRACE
    100 struct	proc *traceproc;
    101 int	tracewhich, tracebuf[TRCSIZ];
    102 u_int	tracex;
    103 char	traceflags[TR_NFLAGS];
    104 #define	pack(v,b)	(((v)->v_mount->mnt_stat.f_fsidx.__fsid_val[0])<<16)|(b)
    105 #define	trace(a,b,c) {							\
    106 	if (traceflags[a])						\
    107 		trace1(a,b,c);						\
    108 }
    109 #else
    110 #define	trace(a,b,c)
    111 #endif /* TRACE */
    112 #endif /* _KERNEL */
    113 
    114 #endif /* !_SYS_TRACE_H_ */
    115