208 lines
6.1 KiB
C
208 lines
6.1 KiB
C
/* $NetBSD: nlist.c,v 1.26 2008/04/28 20:22:51 martin Exp $ */
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/*
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* Copyright (c) 2000 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Simon Burge.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Copyright (c) 1990, 1993, 1994
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)nlist.c 8.4 (Berkeley) 4/2/94";
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#else
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__RCSID("$NetBSD: nlist.c,v 1.26 2008/04/28 20:22:51 martin Exp $");
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#endif
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#endif /* not lint */
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#include <sys/param.h>
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#include <sys/time.h>
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#include <sys/lwp.h>
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#include <sys/proc.h>
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#include <sys/resource.h>
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#include <sys/sysctl.h>
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#include <err.h>
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#include <errno.h>
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#include <kvm.h>
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#include <math.h>
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#include <nlist.h>
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#include <stdio.h>
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#include <string.h>
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#include <unistd.h>
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#include "ps.h"
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struct nlist psnl[] = {
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{ .n_name = "_fscale" },
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#define X_FSCALE 0
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{ .n_name = "_ccpu" },
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#define X_CCPU 1
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{ .n_name = "_physmem" },
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#define X_PHYSMEM 2
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{ .n_name = "_maxslp" },
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#define X_MAXSLP 3
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{ .n_name = NULL }
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};
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double ccpu; /* kernel _ccpu variable */
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int nlistread; /* if nlist already read. */
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int mempages; /* number of pages of phys. memory */
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int fscale; /* kernel _fscale variable */
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int maxslp; /* kernel _maxslp variable */
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int uspace; /* kernel USPACE value */
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#define kread(x, v) \
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kvm_read(kd, psnl[x].n_value, (char *)&v, sizeof v) != sizeof(v)
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int
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donlist(void)
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{
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int rval;
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fixpt_t xccpu;
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rval = 0;
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nlistread = 1;
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if (kvm_nlist(kd, psnl)) {
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nlisterr(psnl);
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eval = 1;
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return (1);
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}
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if (kread(X_FSCALE, fscale)) {
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warnx("fscale: %s", kvm_geterr(kd));
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eval = rval = 1;
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}
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if (kread(X_PHYSMEM, mempages)) {
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warnx("avail_start: %s", kvm_geterr(kd));
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eval = rval = 1;
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}
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if (kread(X_CCPU, xccpu)) {
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warnx("ccpu: %s", kvm_geterr(kd));
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eval = rval = 1;
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}
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if (kread(X_MAXSLP, maxslp)) {
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warnx("maxslp: %s", kvm_geterr(kd));
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eval = rval = 1;
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}
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ccpu = (double)xccpu / fscale;
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return (rval);
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}
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int
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donlist_sysctl(void)
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{
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int mib[2];
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size_t size;
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fixpt_t xccpu;
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uint64_t memsize;
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nlistread = 1;
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mib[0] = CTL_HW;
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mib[1] = HW_PHYSMEM64;
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size = sizeof(memsize);
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if (sysctl(mib, 2, &memsize, &size, NULL, 0) == 0)
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mempages = memsize / getpagesize();
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else
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mempages = 0;
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mib[0] = CTL_KERN;
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mib[1] = KERN_FSCALE;
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size = sizeof(fscale);
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if (sysctl(mib, 2, &fscale, &size, NULL, 0) == -1)
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fscale = (1 << 8); /* XXX Hopefully reasonable default */
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mib[0] = CTL_KERN;
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mib[1] = KERN_CCPU;
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size = sizeof(xccpu);
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if (sysctl(mib, 2, &xccpu, &size, NULL, 0) == -1)
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ccpu = exp(-1.0 / 20.0); /* XXX Hopefully reasonable default */
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else
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ccpu = (double)xccpu / fscale;
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mib[0] = CTL_VM;
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mib[1] = VM_MAXSLP;
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size = sizeof(maxslp);
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if (sysctl(mib, 2, &maxslp, &size, NULL, 0) == -1)
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#ifdef MAXSLP
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maxslp = MAXSLP;
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#else
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maxslp = 20; /* XXX Hopefully reasonable default */
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#endif
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mib[0] = CTL_VM;
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mib[1] = VM_USPACE;
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size = sizeof(uspace);
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if (sysctl(mib, 2, &uspace, &size, NULL, 0) == -1)
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#ifdef USPACE
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uspace = USPACE;
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#else
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uspace = getpagesize(); /* XXX Hopefully reasonable default */
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#endif
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return 0;
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}
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void
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nlisterr(struct nlist nl[])
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{
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int i;
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(void)fprintf(stderr, "ps: nlist: can't find following symbols:");
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for (i = 0; nl[i].n_name != NULL; i++)
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if (nl[i].n_value == 0)
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(void)fprintf(stderr, " %s", nl[i].n_name);
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(void)fprintf(stderr, "\n");
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}
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