1/* $NetBSD: nlist.c,v 1.25 2006/10/16 00:31:47 christos 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 1.25 2006/10/16 00:31:47 christos 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 ccpu; /* 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#define kread(x, v) \ 108 kvm_read(kd, psnl[x].n_value, (char *)&v, sizeof v) != sizeof(v) 109 110int 111donlist(void) 112{ 113 int rval; 114 fixpt_t xccpu; 115 116 rval = 0; 117 nlistread = 1; 118 if (kvm_nlist(kd, psnl)) { 119 nlisterr(psnl); 120 eval = 1; 121 return (1); 122 } 123 if (kread(X_FSCALE, fscale)) { 124 warnx("fscale: %s", kvm_geterr(kd)); 125 eval = rval = 1; 126 } 127 if (kread(X_PHYSMEM, mempages)) { 128 warnx("avail_start: %s", kvm_geterr(kd)); 129 eval = rval = 1; 130 } 131 if (kread(X_CCPU, xccpu)) { 132 warnx("ccpu: %s", kvm_geterr(kd)); 133 eval = rval = 1; 134 } 135 if (kread(X_MAXSLP, maxslp)) { 136 warnx("maxslp: %s", kvm_geterr(kd)); 137 eval = rval = 1; 138 } 139 ccpu = (double)xccpu / fscale; 140 return (rval); 141} 142 143int 144donlist_sysctl(void) 145{ 146 int mib[2]; 147 size_t size; 148 fixpt_t xccpu; 149 uint64_t memsize; 150 151 nlistread = 1; 152 mib[0] = CTL_HW; 153 mib[1] = HW_PHYSMEM64; 154 size = sizeof(memsize); 155 if (sysctl(mib, 2, &memsize, &size, NULL, 0) == 0) 156 mempages = memsize / getpagesize(); 157 else 158 mempages = 0; 159 160 mib[0] = CTL_KERN; 161 mib[1] = KERN_FSCALE; 162 size = sizeof(fscale); 163 if (sysctl(mib, 2, &fscale, &size, NULL, 0) == -1) 164 fscale = (1 << 8); /* XXX Hopefully reasonable default */ 165 166 mib[0] = CTL_KERN; 167 mib[1] = KERN_CCPU; 168 size = sizeof(xccpu); 169 if (sysctl(mib, 2, &xccpu, &size, NULL, 0) == -1) 170 ccpu = exp(-1.0 / 20.0); /* XXX Hopefully reasonable default */ 171 else 172 ccpu = (double)xccpu / fscale; 173 174 mib[0] = CTL_VM; 175 mib[1] = VM_MAXSLP; 176 size = sizeof(maxslp); 177 if (sysctl(mib, 2, &maxslp, &size, NULL, 0) == -1) 178#ifdef MAXSLP 179 maxslp = MAXSLP; 180#else 181 maxslp = 20; /* XXX Hopefully reasonable default */ 182#endif 183 184 mib[0] = CTL_VM; 185 mib[1] = VM_USPACE; 186 size = sizeof(uspace); 187 if (sysctl(mib, 2, &uspace, &size, NULL, 0) == -1) 188#ifdef USPACE 189 uspace = USPACE; 190#else 191 uspace = getpagesize(); /* XXX Hopefully reasonable default */ 192#endif 193 194 return 0; 195} 196 197void 198nlisterr(struct nlist nl[]) 199{ 200 int i; 201 202 (void)fprintf(stderr, "ps: nlist: can't find following symbols:"); 203 for (i = 0; nl[i].n_name != NULL; i++) 204 if (nl[i].n_value == 0) 205 (void)fprintf(stderr, " %s", nl[i].n_name); 206 (void)fprintf(stderr, "\n"); 207} 208