GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: lib/libkvm/kvm_getloadavg.c Lines: 0 18 0.0 %
Date: 2017-11-13 Branches: 0 12 0.0 %

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/*	$OpenBSD: kvm_getloadavg.c,v 1.9 2009/10/27 23:59:28 deraadt Exp $ */
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/*	$NetBSD: kvm_getloadavg.c,v 1.2 1996/03/18 22:33:31 thorpej Exp $	*/
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/*-
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 * Copyright (c) 1993
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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/param.h>
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#include <sys/time.h>
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#include <sys/resource.h>
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#include <sys/proc.h>
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#include <sys/sysctl.h>
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#include <db.h>
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#include <fcntl.h>
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#include <limits.h>
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#include <nlist.h>
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#include <stdlib.h>
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#include <kvm.h>
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#include "kvm_private.h"
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static struct nlist nl[] = {
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	{ "_averunnable" },
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#define	X_AVERUNNABLE	0
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	{ "_fscale" },
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#define	X_FSCALE	1
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	{ "" },
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};
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/*
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 * kvm_getloadavg() -- Get system load averages, from live or dead kernels.
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 *
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 * Put `nelem' samples into `loadavg' array.
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 * Return number of samples retrieved, or -1 on error.
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 */
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int
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kvm_getloadavg(kvm_t *kd, double loadavg[], int nelem)
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{
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	struct loadavg loadinfo;
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	struct nlist *p;
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	int fscale, i;
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	if (ISALIVE(kd))
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		return (getloadavg(loadavg, nelem));
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	if (kvm_nlist(kd, nl) != 0) {
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		for (p = nl; p->n_type != 0; ++p)
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			;
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		_kvm_err(kd, kd->program,
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		    "%s: no such symbol", p->n_name);
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		return (-1);
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	}
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	if (KREAD(kd, nl[X_AVERUNNABLE].n_value, &loadinfo)) {
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		_kvm_err(kd, kd->program, "can't read averunnable");
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		return (-1);
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	}
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	/*
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	 * Old kernels have fscale separately; if not found assume
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	 * running new format.
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	 */
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	if (!KREAD(kd, nl[X_FSCALE].n_value, &fscale))
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		loadinfo.fscale = fscale;
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	nelem = MIN(nelem, sizeof(loadinfo.ldavg) / sizeof(fixpt_t));
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	for (i = 0; i < nelem; i++)
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		loadavg[i] = (double) loadinfo.ldavg[i] / loadinfo.fscale;
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	return (nelem);
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}