1/* $NetBSD: nlist.c,v 1.27 2016/11/28 08:19:23 rin Exp $ */
2
3/*
4 * Copyright (c) 2000 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Simon Burge.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32/*
33 * Copyright (c) 1990, 1993, 1994
34 * The Regents of the University of California. All rights reserved.
35 *
36 * Redistribution and use in source and binary forms, with or without
37 * modification, are permitted provided that the following conditions
38 * are met:
39 * 1. Redistributions of source code must retain the above copyright
40 * notice, this list of conditions and the following disclaimer.
41 * 2. Redistributions in binary form must reproduce the above copyright
42 * notice, this list of conditions and the following disclaimer in the
43 * documentation and/or other materials provided with the distribution.
44 * 3. Neither the name of the University nor the names of its contributors
45 * may be used to endorse or promote products derived from this software
46 * without specific prior written permission.
47 *
48 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
49 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
50 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
51 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
52 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
53 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
54 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
55 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
56 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
57 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
58 * SUCH DAMAGE.
59 */
60
61#include <sys/cdefs.h>
62#ifndef lint
63#if 0
64static char sccsid[] = "@(#)nlist.c 8.4 (Berkeley) 4/2/94";
65#else
66__RCSID("$NetBSD: nlist.c,v 1.27 2016/11/28 08:19:23 rin Exp $");
67#endif
68#endif /* not lint */
69
70#include <sys/param.h>
71#include <sys/time.h>
72#include <sys/lwp.h>
73#include <sys/proc.h>
74#include <sys/resource.h>
75#include <sys/sysctl.h>
76
77#include <err.h>
78#include <errno.h>
79#include <kvm.h>
80#include <math.h>
81#include <nlist.h>
82#include <stdio.h>
83#include <string.h>
84#include <unistd.h>
85
86#include "ps.h"
87
88struct nlist psnl[] = {
89 { .n_name = "_fscale" },
90#define X_FSCALE 0
91 { .n_name = "_ccpu" },
92#define X_CCPU 1
93 { .n_name = "_physmem" },
94#define X_PHYSMEM 2
95 { .n_name = "_maxslp" },
96#define X_MAXSLP 3
97 { .n_name = NULL }
98};
99
100double log_ccpu; /* log of kernel _ccpu variable */
101int nlistread; /* if nlist already read. */
102int mempages; /* number of pages of phys. memory */
103int fscale; /* kernel _fscale variable */
104int maxslp; /* kernel _maxslp variable */
105int uspace; /* kernel USPACE value */
106
107/* XXX Hopefully reasonable default */
108#define MEMPAGES 0
109#ifndef FSCALE
110#define FSCALE (1 << 8)
111#endif
112#define LOG_CCPU (-1.0 / 20.0)
113#ifndef MAXSLP
114#define MAXSLP 20
115#endif
116#ifndef USPACE
117#define USPACE (getpagesize())
118#endif
119
120#define kread(x, v) \
121 kvm_read(kd, psnl[x].n_value, (char *)&v, sizeof v) != sizeof(v)
122
123void
124donlist(void)
125{
126 fixpt_t xccpu;
127
128 nlistread = 1;
129
130 if (kvm_nlist(kd, psnl)) {
131 nlisterr(psnl);
132 eval = 1;
133 fscale = FSCALE;
134 mempages = MEMPAGES;
135 log_ccpu = LOG_CCPU;
136 maxslp = MAXSLP;
137 return;
138 }
139
140 if (kread(X_FSCALE, fscale)) {
141 warnx("fscale: %s", kvm_geterr(kd));
142 eval = 1;
143 fscale = FSCALE;
144 }
145
146 if (kread(X_PHYSMEM, mempages)) {
147 warnx("avail_start: %s", kvm_geterr(kd));
148 eval = 1;
149 mempages = MEMPAGES;
150 }
151
152 if (kread(X_CCPU, xccpu)) {
153 warnx("ccpu: %s", kvm_geterr(kd));
154 eval = 1;
155 log_ccpu = LOG_CCPU;
156 } else
157 log_ccpu = log((double)xccpu / fscale);
158
159 if (kread(X_MAXSLP, maxslp)) {
160 warnx("maxslp: %s", kvm_geterr(kd));
161 eval = 1;
162 maxslp = MAXSLP;
163 }
164}
165
166void
167donlist_sysctl(void)
168{
169 int mib[2];
170 size_t size;
171 fixpt_t xccpu;
172 uint64_t memsize;
173
174 nlistread = 1;
175
176 mib[0] = CTL_KERN;
177 mib[1] = KERN_FSCALE;
178 size = sizeof(fscale);
179 if (sysctl(mib, 2, &fscale, &size, NULL, 0)) {
180 warn("fscale");
181 eval = 1;
182 fscale = FSCALE;
183 }
184
185 mib[0] = CTL_HW;
186 mib[1] = HW_PHYSMEM64;
187 size = sizeof(memsize);
188 if (sysctl(mib, 2, &memsize, &size, NULL, 0)) {
189 warn("avail_start");
190 eval = 1;
191 mempages = MEMPAGES;
192 } else
193 mempages = memsize / getpagesize();
194
195 mib[0] = CTL_KERN;
196 mib[1] = KERN_CCPU;
197 size = sizeof(xccpu);
198 if (sysctl(mib, 2, &xccpu, &size, NULL, 0)) {
199 warn("ccpu");
200 eval = 1;
201 log_ccpu = LOG_CCPU;
202 } else
203 log_ccpu = log((double)xccpu / fscale);
204
205 mib[0] = CTL_VM;
206 mib[1] = VM_MAXSLP;
207 size = sizeof(maxslp);
208 if (sysctl(mib, 2, &maxslp, &size, NULL, 0)) {
209 warn("maxslp");
210 eval = 1;
211 maxslp = MAXSLP;
212 }
213
214 mib[0] = CTL_VM;
215 mib[1] = VM_USPACE;
216 size = sizeof(uspace);
217 if (sysctl(mib, 2, &uspace, &size, NULL, 0)) {
218 warn("uspace");
219 eval = 1;
220 uspace = USPACE;
221 }
222}
223
224void
225nlisterr(struct nlist nl[])
226{
227 int i;
228
229 (void)fprintf(stderr, "ps: nlist: can't find following symbols:");
230 for (i = 0; nl[i].n_name != NULL; i++)
231 if (nl[i].n_value == 0)
232 (void)fprintf(stderr, " %s", nl[i].n_name);
233 (void)fprintf(stderr, "\n");
234}
235