BSD 4.4 Lite usr.sbin Sources

3 files changed, 656 insertions, 0 deletions

diff --git a/usr.sbin/kgmon/Makefile b/usr.sbin/kgmon/Makefile
new file mode 100644
index 0000000..e0ef616
--- /dev/null
+++ b/usr.sbin/kgmon/Makefile
@@ -0,0 +1,14 @@
+#	@(#)Makefile	8.1 (Berkeley) 6/6/93
+
+PROG=	kgmon
+MAN8=	kgmon.0
+DPADD=	${LIBKVM}
+LDADD=	-lkvm
+#
+# This program may safely be run setuid-root to allow non-root
+# users to start, stop, and reset profiling buffers.
+#
+#BINOWN=root
+#BINMODE=4555
+
+.include <bsd.prog.mk>
diff --git a/usr.sbin/kgmon/kgmon.8 b/usr.sbin/kgmon/kgmon.8
new file mode 100644
index 0000000..060ed2e
--- /dev/null
+++ b/usr.sbin/kgmon/kgmon.8
@@ -0,0 +1,122 @@
+.\" Copyright (c) 1983, 1991, 1993
+.\"	The Regents of the University of California.  All rights reserved.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\"    notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\"    notice, this list of conditions and the following disclaimer in the
+.\"    documentation and/or other materials provided with the distribution.
+.\" 3. All advertising materials mentioning features or use of this software
+.\"    must display the following acknowledgement:
+.\"	This product includes software developed by the University of
+.\"	California, Berkeley and its contributors.
+.\" 4. Neither the name of the University nor the names of its contributors
+.\"    may be used to endorse or promote products derived from this software
+.\"    without specific prior written permission.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+.\" SUCH DAMAGE.
+.\"
+.\"     @(#)kgmon.8	8.1 (Berkeley) 6/6/93
+.\"
+.Dd June 6, 1993
+.Dt KGMON 8
+.Os BSD 4.2
+.Sh NAME
+.Nm kgmon
+.Nd generate a dump of the operating system's profile buffers
+.Sh SYNOPSIS
+.Nm kgmon
+.Op Fl bhpr
+.Op Fl M core
+.Op Fl N system
+.Sh DESCRIPTION
+.Nm Kgmon
+is a tool used when profiling the operating system.
+When no arguments are supplied,
+.Nm kgmon
+indicates the state of operating system profiling as running,
+off, or not configured.
+(see
+.Xr config 8 )
+If the
+.Fl p
+flag is specified,
+.Nm kgmon
+extracts profile data from the operating system and produces a
+.Pa gmon.out
+file suitable for later analysis by
+.Xr gprof 1 .
+.Pp
+The options are as follows:
+.Bl -tag -width Ds
+.It Fl b
+Resume the collection of profile data.
+.It Fl h
+Stop the collection of profile data.
+.It Fl p
+Dump the contents of the profile buffers into a
+.Pa gmon.out
+file.
+.It Fl r
+Reset all the profile buffers. 
+If the
+.Fl p
+flag is also specified, the
+.Pa gmon.out
+file is generated before the buffers are reset.
+.It Fl M
+Extract values associated with the name list from the specified core
+instead of the default ``/dev/kmem''.
+.It Fl N
+Extract the name list from the specified system instead of the
+default ``/vmunix''.
+.El
+.Pp
+If neither 
+.Fl b
+nor
+.Fl h
+is specified, the state of profiling collection remains unchanged.
+For example, if the
+.Fl p
+flag is specified and profile data is being collected,
+profiling will be momentarily suspended,
+the operating system profile buffers will be dumped,
+and profiling will be immediately resumed.
+.Sh FILES
+.Bl -tag -width /dev/kmemx -compact
+.It Pa /vmunix
+the default system
+.It Pa /dev/kmem
+the default memory
+.El
+.Sh SEE ALSO
+.Xr gprof 1 ,
+.Xr config 8
+.Sh DIAGNOSTICS
+Users with only read permission on
+.Pa /dev/kmem
+cannot change the state
+of profiling collection. 
+They can get a 
+.Pa gmon.out
+file with the warning that the data may be
+inconsistent if profiling is in progress.
+.Sh HISTORY
+The
+.Nm
+command appeared in
+.Bx 4.2 .
diff --git a/usr.sbin/kgmon/kgmon.c b/usr.sbin/kgmon/kgmon.c
new file mode 100644
index 0000000..1265ce2
--- /dev/null
+++ b/usr.sbin/kgmon/kgmon.c
@@ -0,0 +1,520 @@
+/*
+ * Copyright (c) 1983, 1992, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef lint
+static char copyright[] =
+"@(#) Copyright (c) 1983, 1992, 1993\n\
+	The Regents of the University of California.  All rights reserved.\n";
+#endif /* not lint */
+
+#ifndef lint
+static char sccsid[] = "@(#)kgmon.c	8.1 (Berkeley) 6/6/93";
+#endif /* not lint */
+
+#include <sys/param.h>
+#include <sys/file.h>
+#include <sys/sysctl.h>
+#include <sys/gmon.h>
+#include <errno.h>
+#include <kvm.h>
+#include <limits.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <nlist.h>
+#include <ctype.h>
+#include <paths.h>
+
+struct nlist nl[] = {
+#define	N_GMONPARAM	0
+	{ "__gmonparam" },
+#define	N_PROFHZ	1
+	{ "_profhz" },
+	0,
+};
+
+struct kvmvars {
+	kvm_t	*kd;
+	struct gmonparam gpm;
+};
+
+int	bflag, hflag, kflag, rflag, pflag;
+int	debug = 0;
+void	setprof __P((struct kvmvars *kvp, int state));
+void	dumpstate __P((struct kvmvars *kvp));
+void	reset __P((struct kvmvars *kvp));
+
+int
+main(int argc, char **argv)
+{
+	extern char *optarg;
+	extern int optind;
+	int ch, mode, disp, accessmode;
+	struct kvmvars kvmvars;
+	char *system, *kmemf;
+
+	seteuid(getuid());
+	kmemf = NULL;
+	system = NULL;
+	while ((ch = getopt(argc, argv, "M:N:bhpr")) != EOF) {
+		switch((char)ch) {
+
+		case 'M':
+			kmemf = optarg;
+			kflag = 1;
+			break;
+
+		case 'N':
+			system = optarg;
+			break;
+
+		case 'b':
+			bflag = 1;
+			break;
+
+		case 'h':
+			hflag = 1;
+			break;
+
+		case 'p':
+			pflag = 1;
+			break;
+
+		case 'r':
+			rflag = 1;
+			break;
+
+		default:
+			(void)fprintf(stderr,
+			    "usage: kgmon [-bhrp] [-M core] [-N system]\n");
+			exit(1);
+		}
+	}
+	argc -= optind;
+	argv += optind;
+
+#define BACKWARD_COMPATIBILITY
+#ifdef	BACKWARD_COMPATIBILITY
+	if (*argv) {
+		system = *argv;
+		if (*++argv) {
+			kmemf = *argv;
+			++kflag;
+		}
+	}
+#endif
+	if (system == NULL)
+		system = _PATH_UNIX;
+	accessmode = openfiles(system, kmemf, &kvmvars);
+	mode = getprof(&kvmvars);
+	if (hflag)
+		disp = GMON_PROF_OFF;
+	else if (bflag)
+		disp = GMON_PROF_ON;
+	else
+		disp = mode;
+	if (pflag)
+		dumpstate(&kvmvars);
+	if (rflag)
+		reset(&kvmvars);
+	if (accessmode == O_RDWR)
+		setprof(&kvmvars, disp);
+	(void)fprintf(stdout, "kgmon: kernel profiling is %s.\n",
+		      disp == GMON_PROF_OFF ? "off" : "running");
+	return (0);
+}
+
+/*
+ * Check that profiling is enabled and open any ncessary files.
+ */
+openfiles(system, kmemf, kvp)
+	char *system;
+	char *kmemf;
+	struct kvmvars *kvp;
+{
+	int mib[3], state, size, openmode;
+	char errbuf[_POSIX2_LINE_MAX];
+
+	if (!kflag) {
+		mib[0] = CTL_KERN;
+		mib[1] = KERN_PROF;
+		mib[2] = GPROF_STATE;
+		size = sizeof state;
+		if (sysctl(mib, 3, &state, &size, NULL, 0) < 0) {
+			(void)fprintf(stderr,
+			    "kgmon: profiling not defined in kernel.\n");
+			exit(20);
+		}
+		if (!(bflag || hflag || rflag ||
+		    (pflag && state == GMON_PROF_ON)))
+			return (O_RDONLY);
+		(void)seteuid(0);
+		if (sysctl(mib, 3, NULL, NULL, &state, size) >= 0)
+			return (O_RDWR);
+		(void)seteuid(getuid());
+		kern_readonly(state);
+		return (O_RDONLY);
+	}
+	openmode = (bflag || hflag || pflag || rflag) ? O_RDWR : O_RDONLY;
+	kvp->kd = kvm_openfiles(system, kmemf, NULL, openmode, errbuf);
+	if (kvp->kd == NULL) {
+		if (openmode == O_RDWR) {
+			openmode = O_RDONLY;
+			kvp->kd = kvm_openfiles(system, kmemf, NULL, O_RDONLY,
+			    errbuf);
+		}
+		if (kvp->kd == NULL) {
+			(void)fprintf(stderr, "kgmon: kvm_openfiles: %s\n",
+			    errbuf);
+			exit(2);
+		}
+		kern_readonly(GMON_PROF_ON);
+	}
+	if (kvm_nlist(kvp->kd, nl) < 0) {
+		(void)fprintf(stderr, "kgmon: %s: no namelist\n", system);
+		exit(3);
+	}
+	if (!nl[N_GMONPARAM].n_value) {
+		(void)fprintf(stderr,
+		    "kgmon: profiling not defined in kernel.\n");
+		exit(20);
+	}
+	return (openmode);
+}
+
+/*
+ * Suppress options that require a writable kernel.
+ */
+kern_readonly(mode)
+	int mode;
+{
+
+	(void)fprintf(stderr, "kgmon: kernel read-only: ");
+	if (pflag && mode == GMON_PROF_ON)
+		(void)fprintf(stderr, "data may be inconsistent\n");
+	if (rflag)
+		(void)fprintf(stderr, "-r supressed\n");
+	if (bflag)
+		(void)fprintf(stderr, "-b supressed\n");
+	if (hflag)
+		(void)fprintf(stderr, "-h supressed\n");
+	rflag = bflag = hflag = 0;
+}
+
+/*
+ * Get the state of kernel profiling.
+ */
+getprof(kvp)
+	struct kvmvars *kvp;
+{
+	int mib[3], size;
+
+	if (kflag) {
+		size = kvm_read(kvp->kd, nl[N_GMONPARAM].n_value, &kvp->gpm,
+		    sizeof kvp->gpm);
+	} else {
+		mib[0] = CTL_KERN;
+		mib[1] = KERN_PROF;
+		mib[2] = GPROF_GMONPARAM;
+		size = sizeof kvp->gpm;
+		if (sysctl(mib, 3, &kvp->gpm, &size, NULL, 0) < 0)
+			size = 0;
+	}
+	if (size != sizeof kvp->gpm) {
+		(void)fprintf(stderr, "kgmon: cannot get gmonparam: %s\n",
+		    kflag ? kvm_geterr(kvp->kd) : strerror(errno));
+		exit (4);
+	}
+	return (kvp->gpm.state);
+}
+
+/*
+ * Enable or disable kernel profiling according to the state variable.
+ */
+void
+setprof(kvp, state)
+	struct kvmvars *kvp;
+	int state;
+{
+	struct gmonparam *p = (struct gmonparam *)nl[N_GMONPARAM].n_value;
+	int mib[3], sz, oldstate;
+
+	sz = sizeof(state);
+	if (!kflag) {
+		mib[0] = CTL_KERN;
+		mib[1] = KERN_PROF;
+		mib[2] = GPROF_STATE;
+		if (sysctl(mib, 3, &oldstate, &sz, NULL, 0) < 0)
+			goto bad;
+		if (oldstate == state)
+			return;
+		(void)seteuid(0);
+		if (sysctl(mib, 3, NULL, NULL, &state, sz) >= 0) {
+			(void)seteuid(getuid());
+			return;
+		}
+		(void)seteuid(getuid());
+	} else if (kvm_write(kvp->kd, (u_long)&p->state, (void *)&state, sz) 
+	    == sz)
+		return;
+bad:
+	(void)fprintf(stderr, "kgmon: warning: cannot turn profiling %s\n",
+	    state == GMON_PROF_OFF ? "off" : "on");
+}
+
+/*
+ * Build the gmon.out file.
+ */
+void
+dumpstate(kvp)
+	struct kvmvars *kvp;
+{
+	register FILE *fp;
+	struct rawarc rawarc;
+	struct tostruct *tos;
+	u_long frompc, addr;
+	u_short *froms, *tickbuf;
+	int mib[3], i;
+	struct gmonhdr h;
+	int fromindex, endfrom, toindex;
+
+	setprof(kvp, GMON_PROF_OFF);
+	fp = fopen("gmon.out", "w");
+	if (fp == 0) {
+		perror("gmon.out");
+		return;
+	}
+
+	/*
+	 * Build the gmon header and write it to a file.
+	 */
+	bzero(&h, sizeof(h));
+	h.lpc = kvp->gpm.lowpc;
+	h.hpc = kvp->gpm.highpc;
+	h.ncnt = kvp->gpm.kcountsize + sizeof(h);
+	h.version = GMONVERSION;
+	h.profrate = getprofhz(kvp);
+	fwrite((char *)&h, sizeof(h), 1, fp);
+
+	/*
+	 * Write out the tick buffer.
+	 */
+	mib[0] = CTL_KERN;
+	mib[1] = KERN_PROF;
+	if ((tickbuf = (u_short *)malloc(kvp->gpm.kcountsize)) == NULL) {
+		fprintf(stderr, "kgmon: cannot allocate kcount space\n");
+		exit (5);
+	}
+	if (kflag) {
+		i = kvm_read(kvp->kd, (u_long)kvp->gpm.kcount, (void *)tickbuf,
+		    kvp->gpm.kcountsize);
+	} else {
+		mib[2] = GPROF_COUNT;
+		i = kvp->gpm.kcountsize;
+		if (sysctl(mib, 3, tickbuf, &i, NULL, 0) < 0)
+			i = 0;
+	}
+	if (i != kvp->gpm.kcountsize) {
+		(void)fprintf(stderr, "kgmon: read ticks: read %u, got %d: %s",
+		    kvp->gpm.kcountsize, i,
+		    kflag ? kvm_geterr(kvp->kd) : strerror(errno));
+		exit(6);
+	}
+	if ((fwrite(tickbuf, kvp->gpm.kcountsize, 1, fp)) != 1) {
+		perror("kgmon: writing tocks to gmon.out");
+		exit(7);
+	}
+	free(tickbuf);
+
+	/*
+	 * Write out the arc info.
+	 */
+	if ((froms = (u_short *)malloc(kvp->gpm.fromssize)) == NULL) {
+		fprintf(stderr, "kgmon: cannot allocate froms space\n");
+		exit (8);
+	}
+	if (kflag) {
+		i = kvm_read(kvp->kd, (u_long)kvp->gpm.froms, (void *)froms,
+		    kvp->gpm.fromssize);
+	} else {
+		mib[2] = GPROF_FROMS;
+		i = kvp->gpm.fromssize;
+		if (sysctl(mib, 3, froms, &i, NULL, 0) < 0)
+			i = 0;
+	}
+	if (i != kvp->gpm.fromssize) {
+		(void)fprintf(stderr, "kgmon: read froms: read %u, got %d: %s",
+		    kvp->gpm.fromssize, i,
+		    kflag ? kvm_geterr(kvp->kd) : strerror(errno));
+		exit(9);
+	}
+	if ((tos = (struct tostruct *)malloc(kvp->gpm.tossize)) == NULL) {
+		fprintf(stderr, "kgmon: cannot allocate tos space\n");
+		exit(10);
+	}
+	if (kflag) {
+		i = kvm_read(kvp->kd, (u_long)kvp->gpm.tos, (void *)tos,
+		    kvp->gpm.tossize);
+	} else {
+		mib[2] = GPROF_TOS;
+		i = kvp->gpm.tossize;
+		if (sysctl(mib, 3, tos, &i, NULL, 0) < 0)
+			i = 0;
+	}
+	if (i != kvp->gpm.tossize) {
+		(void)fprintf(stderr, "kgmon: read tos: read %u, got %d: %s",
+		    kvp->gpm.tossize, i,
+		    kflag ? kvm_geterr(kvp->kd) : strerror(errno));
+		exit(11);
+	}
+	if (debug)
+		(void)fprintf(stderr, "kgmon: lowpc 0x%x, textsize 0x%x\n",
+			      kvp->gpm.lowpc, kvp->gpm.textsize);
+	endfrom = kvp->gpm.fromssize / sizeof(*froms);
+	for (fromindex = 0; fromindex < endfrom; ++fromindex) {
+		if (froms[fromindex] == 0)
+			continue;
+		frompc = (u_long)kvp->gpm.lowpc +
+		    (fromindex * kvp->gpm.hashfraction * sizeof(*froms));
+		for (toindex = froms[fromindex]; toindex != 0;
+		   toindex = tos[toindex].link) {
+			if (debug)
+			    (void)fprintf(stderr,
+			    "%s: [mcleanup] frompc 0x%x selfpc 0x%x count %d\n",
+			    "kgmon", frompc, tos[toindex].selfpc,
+			    tos[toindex].count);
+			rawarc.raw_frompc = frompc;
+			rawarc.raw_selfpc = (u_long)tos[toindex].selfpc;
+			rawarc.raw_count = tos[toindex].count;
+			fwrite((char *)&rawarc, sizeof(rawarc), 1, fp);
+		}
+	}
+	fclose(fp);
+}
+
+/*
+ * Get the profiling rate.
+ */
+int
+getprofhz(kvp)
+	struct kvmvars *kvp;
+{
+	int mib[2], size, profrate;
+	struct clockinfo clockrate;
+
+	if (kflag) {
+		profrate = 1;
+		if (kvm_read(kvp->kd, nl[N_PROFHZ].n_value, &profrate,
+		    sizeof profrate) != sizeof profrate)
+			(void)fprintf(stderr, "kgmon: get clockrate: %s\n",
+				kvm_geterr(kvp->kd));
+		return (profrate);
+	}
+	mib[0] = CTL_KERN;
+	mib[1] = KERN_CLOCKRATE;
+	clockrate.profhz = 1;
+	size = sizeof clockrate;
+	if (sysctl(mib, 2, &clockrate, &size, NULL, 0) < 0)
+		(void)fprintf(stderr, "kgmon: get clockrate: %s\n",
+			strerror(errno));
+	return (clockrate.profhz);
+}
+
+/*
+ * Reset the kernel profiling date structures.
+ */
+void
+reset(kvp)
+	struct kvmvars *kvp;
+{
+	char *zbuf;
+	u_long biggest;
+	int mib[3];
+
+	setprof(kvp, GMON_PROF_OFF);
+
+	biggest = kvp->gpm.kcountsize;
+	if (kvp->gpm.fromssize > biggest)
+		biggest = kvp->gpm.fromssize;
+	if (kvp->gpm.tossize > biggest)
+		biggest = kvp->gpm.tossize;
+	if ((zbuf = (char *)malloc(biggest)) == NULL) {
+		fprintf(stderr, "kgmon: cannot allocate zbuf space\n");
+		exit(12);
+	}
+	bzero(zbuf, biggest);
+	if (kflag) {
+		if (kvm_write(kvp->kd, (u_long)kvp->gpm.kcount, zbuf,
+		    kvp->gpm.kcountsize) != kvp->gpm.kcountsize) {
+			(void)fprintf(stderr, "kgmon: tickbuf zero: %s\n",
+			    kvm_geterr(kvp->kd));
+			exit(13);
+		}
+		if (kvm_write(kvp->kd, (u_long)kvp->gpm.froms, zbuf,
+		    kvp->gpm.fromssize) != kvp->gpm.fromssize) {
+			(void)fprintf(stderr, "kgmon: froms zero: %s\n",
+			    kvm_geterr(kvp->kd));
+			exit(14);
+		}
+		if (kvm_write(kvp->kd, (u_long)kvp->gpm.tos, zbuf,
+		    kvp->gpm.tossize) != kvp->gpm.tossize) {
+			(void)fprintf(stderr, "kgmon: tos zero: %s\n",
+			    kvm_geterr(kvp->kd));
+			exit(15);
+		}
+		return;
+	}
+	(void)seteuid(0);
+	mib[0] = CTL_KERN;
+	mib[1] = KERN_PROF;
+	mib[2] = GPROF_COUNT;
+	if (sysctl(mib, 3, NULL, NULL, zbuf, kvp->gpm.kcountsize) < 0) {
+		(void)fprintf(stderr, "kgmon: tickbuf zero: %s\n",
+		    strerror(errno));
+		exit(13);
+	}
+	mib[2] = GPROF_FROMS;
+	if (sysctl(mib, 3, NULL, NULL, zbuf, kvp->gpm.fromssize) < 0) {
+		(void)fprintf(stderr, "kgmon: froms zero: %s\n",
+		    strerror(errno));
+		exit(14);
+	}
+	mib[2] = GPROF_TOS;
+	if (sysctl(mib, 3, NULL, NULL, zbuf, kvp->gpm.tossize) < 0) {
+		(void)fprintf(stderr, "kgmon: tos zero: %s\n",
+		    strerror(errno));
+		exit(15);
+	}
+	(void)seteuid(getuid());
+	free(zbuf);
+}