xref: /freebsd/usr.bin/ktrace/subr.c (revision a2f733abcff64628b7771a47089628b7327a88bd)
1 /*-
2  * SPDX-License-Identifier: BSD-3-Clause
3  *
4  * Copyright (c) 1988, 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 
32 #if 0
33 #endif
34 
35 #include <sys/cdefs.h>
36 #include <sys/param.h>
37 #include <sys/file.h>
38 #include <sys/proc.h>
39 #include <sys/time.h>
40 #include <sys/uio.h>
41 #include <sys/ktrace.h>
42 
43 #include <stdio.h>
44 
45 #include "ktrace.h"
46 
47 void timevaladd(struct timeval *, struct timeval *);
48 void timevalsub(struct timeval *, struct timeval *);
49 void timevalfix(struct timeval *);
50 
51 int
52 getpoints(char *s)
53 {
54 	int facs = 0;
55 
56 	while (*s) {
57 		switch(*s) {
58 		case 'c':
59 			facs |= KTRFAC_SYSCALL | KTRFAC_SYSRET;
60 			break;
61 		case 'i':
62 			facs |= KTRFAC_GENIO;
63 			break;
64 		case 'f':
65 			facs |= KTRFAC_FAULT | KTRFAC_FAULTEND;
66 			break;
67 		case 'n':
68 			facs |= KTRFAC_NAMEI;
69 			break;
70 		case 'p':
71 			facs |= KTRFAC_CAPFAIL;
72 			break;
73 		case 's':
74 			facs |= KTRFAC_PSIG;
75 			break;
76 		case 't':
77 			facs |= KTRFAC_STRUCT;
78 			break;
79 		case 'u':
80 			facs |= KTRFAC_USER;
81 			break;
82 		case 'w':
83 			facs |= KTRFAC_CSW;
84 			break;
85 		case 'y':
86 			facs |= KTRFAC_SYSCTL;
87 			break;
88 		case '+':
89 			facs |= DEF_POINTS;
90 			break;
91 		default:
92 			return (-1);
93 		}
94 		s++;
95 	}
96 	return (facs);
97 }
98 
99 void
100 timevaladd(struct timeval *t1, struct timeval *t2)
101 {
102 	t1->tv_sec += t2->tv_sec;
103 	t1->tv_usec += t2->tv_usec;
104 	timevalfix(t1);
105 }
106 
107 void
108 timevalsub(struct timeval *t1, struct timeval *t2)
109 {
110 	t1->tv_sec -= t2->tv_sec;
111 	t1->tv_usec -= t2->tv_usec;
112 	timevalfix(t1);
113 }
114 
115 void
116 timevalfix(struct timeval *t1)
117 {
118 	if (t1->tv_usec < 0) {
119 		t1->tv_sec--;
120 		t1->tv_usec += 1000000;
121 	}
122 	if (t1->tv_usec >= 1000000) {
123 		t1->tv_sec++;
124 		t1->tv_usec -= 1000000;
125 	}
126 }
127