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
100struct proc *traceproc;
101int tracewhich, tracebuf[TRCSIZ];
102u_int tracex;
103char 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_ */