8a16b7a18f
Mainly focus on files that use BSD 3-Clause license. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts. Special thanks to Wind River for providing access to "The Duke of Highlander" tool: an older (2014) run over FreeBSD tree was useful as a starting point.
531 lines
14 KiB
C
531 lines
14 KiB
C
/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (c) 1983, 1992, 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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#ifndef lint
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static const char copyright[] =
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"@(#) Copyright (c) 1983, 1992, 1993\n\
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The Regents of the University of California. All rights reserved.\n";
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#endif /* not lint */
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)kgmon.c 8.1 (Berkeley) 6/6/93";
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#endif
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#endif /* not lint */
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/file.h>
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#include <sys/time.h>
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#include <sys/sysctl.h>
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#include <sys/gmon.h>
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#include <ctype.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 <limits.h>
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#include <nlist.h>
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#include <paths.h>
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#include <stddef.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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struct nlist nl[] = {
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#define N_GMONPARAM 0
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{ "__gmonparam" },
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#define N_PROFHZ 1
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{ "_profhz" },
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{ NULL },
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};
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struct kvmvars {
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kvm_t *kd;
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struct gmonparam gpm;
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};
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int Bflag, bflag, hflag, kflag, rflag, pflag;
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int debug = 0;
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int getprof(struct kvmvars *);
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int getprofhz(struct kvmvars *);
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void kern_readonly(int);
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int openfiles(const char *, char *, struct kvmvars *);
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void setprof(struct kvmvars *kvp, int state);
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void dumpstate(struct kvmvars *kvp);
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void reset(struct kvmvars *kvp);
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static void usage(void);
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int
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main(int argc, char **argv)
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{
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int ch, mode, disp, accessmode;
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struct kvmvars kvmvars;
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const char *systemname;
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char *kmemf;
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if (seteuid(getuid()) != 0) {
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err(1, "seteuid failed\n");
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}
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kmemf = NULL;
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systemname = NULL;
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while ((ch = getopt(argc, argv, "M:N:Bbhpr")) != -1) {
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switch((char)ch) {
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case 'M':
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kmemf = optarg;
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kflag = 1;
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break;
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case 'N':
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systemname = optarg;
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break;
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case 'B':
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Bflag = 1;
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break;
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case 'b':
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bflag = 1;
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break;
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case 'h':
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hflag = 1;
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break;
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case 'p':
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pflag = 1;
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break;
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case 'r':
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rflag = 1;
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break;
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default:
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usage();
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}
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}
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argc -= optind;
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argv += optind;
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#define BACKWARD_COMPATIBILITY
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#ifdef BACKWARD_COMPATIBILITY
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if (*argv) {
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systemname = *argv;
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if (*++argv) {
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kmemf = *argv;
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++kflag;
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}
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}
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#endif
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if (systemname == NULL)
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systemname = getbootfile();
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accessmode = openfiles(systemname, kmemf, &kvmvars);
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mode = getprof(&kvmvars);
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if (hflag)
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disp = GMON_PROF_OFF;
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else if (Bflag)
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disp = GMON_PROF_HIRES;
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else if (bflag)
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disp = GMON_PROF_ON;
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else
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disp = mode;
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if (pflag)
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dumpstate(&kvmvars);
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if (rflag)
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reset(&kvmvars);
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if (accessmode == O_RDWR)
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setprof(&kvmvars, disp);
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(void)fprintf(stdout, "kgmon: kernel profiling is %s.\n",
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disp == GMON_PROF_OFF ? "off" :
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disp == GMON_PROF_HIRES ? "running (high resolution)" :
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disp == GMON_PROF_ON ? "running" :
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disp == GMON_PROF_BUSY ? "busy" :
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disp == GMON_PROF_ERROR ? "off (error)" :
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"in an unknown state");
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return (0);
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}
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static void
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usage(void)
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{
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fprintf(stderr, "usage: kgmon [-Bbhrp] [-M core] [-N system]\n");
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exit(1);
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}
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/*
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* Check that profiling is enabled and open any necessary files.
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*/
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int
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openfiles(const char *systemname, char *kmemf, struct kvmvars *kvp)
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{
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size_t size;
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int mib[3], state, openmode;
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char errbuf[_POSIX2_LINE_MAX];
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if (!kflag) {
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mib[0] = CTL_KERN;
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mib[1] = KERN_PROF;
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mib[2] = GPROF_STATE;
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size = sizeof state;
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if (sysctl(mib, 3, &state, &size, NULL, 0) < 0)
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errx(20, "profiling not defined in kernel");
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if (!(Bflag || bflag || hflag || rflag ||
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(pflag &&
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(state == GMON_PROF_HIRES || state == GMON_PROF_ON))))
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return (O_RDONLY);
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(void)seteuid(0);
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if (sysctl(mib, 3, NULL, NULL, &state, size) >= 0)
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return (O_RDWR);
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(void)seteuid(getuid());
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kern_readonly(state);
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return (O_RDONLY);
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}
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openmode = (Bflag || bflag || hflag || pflag || rflag)
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? O_RDWR : O_RDONLY;
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kvp->kd = kvm_openfiles(systemname, kmemf, NULL, openmode, errbuf);
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if (kvp->kd == NULL) {
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if (openmode == O_RDWR) {
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openmode = O_RDONLY;
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kvp->kd = kvm_openfiles(systemname, kmemf, NULL, O_RDONLY,
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errbuf);
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}
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if (kvp->kd == NULL)
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errx(2, "kvm_openfiles: %s", errbuf);
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kern_readonly(GMON_PROF_ON);
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}
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if (kvm_nlist(kvp->kd, nl) < 0)
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errx(3, "%s: no namelist", systemname);
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if (!nl[N_GMONPARAM].n_value)
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errx(20, "profiling not defined in kernel");
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return (openmode);
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}
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/*
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* Suppress options that require a writable kernel.
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*/
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void
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kern_readonly(int mode)
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{
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(void)fprintf(stderr, "kgmon: kernel read-only: ");
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if (pflag && (mode == GMON_PROF_HIRES || mode == GMON_PROF_ON))
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(void)fprintf(stderr, "data may be inconsistent\n");
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if (rflag)
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(void)fprintf(stderr, "-r suppressed\n");
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if (Bflag)
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(void)fprintf(stderr, "-B suppressed\n");
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if (bflag)
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(void)fprintf(stderr, "-b suppressed\n");
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if (hflag)
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(void)fprintf(stderr, "-h suppressed\n");
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rflag = Bflag = bflag = hflag = 0;
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}
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/*
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* Get the state of kernel profiling.
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*/
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int
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getprof(struct kvmvars *kvp)
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{
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size_t size;
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int mib[3];
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if (kflag) {
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size = kvm_read(kvp->kd, nl[N_GMONPARAM].n_value, &kvp->gpm,
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sizeof kvp->gpm);
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} else {
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mib[0] = CTL_KERN;
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mib[1] = KERN_PROF;
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mib[2] = GPROF_GMONPARAM;
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size = sizeof kvp->gpm;
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if (sysctl(mib, 3, &kvp->gpm, &size, NULL, 0) < 0)
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size = 0;
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}
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/*
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* Accept certain undersized "structs" from old kernels. We need
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* everything up to hashfraction, and want profrate and
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* histcounter_type. Assume that the kernel doesn't put garbage
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* in any padding that is returned instead of profrate and
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* histcounter_type. This is a bad assumption for dead kernels,
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* since kvm_read() will normally return garbage for bytes beyond
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* the end of the actual kernel struct, if any.
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*/
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if (size < offsetof(struct gmonparam, hashfraction) +
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sizeof(kvp->gpm.hashfraction) || size > sizeof(kvp->gpm))
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errx(4, "cannot get gmonparam: %s",
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kflag ? kvm_geterr(kvp->kd) : strerror(errno));
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bzero((char *)&kvp->gpm + size, sizeof(kvp->gpm) - size);
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if (kvp->gpm.profrate == 0)
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kvp->gpm.profrate = getprofhz(kvp);
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#ifdef __i386__
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if (kvp->gpm.histcounter_type == 0) {
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/*
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* This fixup only works for not-so-old i386 kernels. The
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* magic 16 is the kernel FUNCTION_ALIGNMENT. 64-bit
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* counters are signed; smaller counters are unsigned.
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*/
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kvp->gpm.histcounter_type = 16 /
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(kvp->gpm.textsize / kvp->gpm.kcountsize) * CHAR_BIT;
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if (kvp->gpm.histcounter_type == 64)
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kvp->gpm.histcounter_type = -64;
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}
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#endif
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return (kvp->gpm.state);
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}
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/*
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* Enable or disable kernel profiling according to the state variable.
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*/
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void
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setprof(struct kvmvars *kvp, int state)
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{
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struct gmonparam *p = (struct gmonparam *)nl[N_GMONPARAM].n_value;
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size_t sz;
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int mib[3], oldstate;
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sz = sizeof(state);
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if (!kflag) {
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mib[0] = CTL_KERN;
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mib[1] = KERN_PROF;
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mib[2] = GPROF_STATE;
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if (sysctl(mib, 3, &oldstate, &sz, NULL, 0) < 0)
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goto bad;
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if (oldstate == state)
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return;
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(void)seteuid(0);
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if (sysctl(mib, 3, NULL, NULL, &state, sz) >= 0) {
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(void)seteuid(getuid());
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return;
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}
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(void)seteuid(getuid());
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} else if (kvm_write(kvp->kd, (u_long)&p->state, (void *)&state, sz)
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== (ssize_t)sz)
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return;
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bad:
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warnx("warning: cannot turn profiling %s",
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state == GMON_PROF_OFF ? "off" : "on");
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}
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/*
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* Build the gmon.out file.
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*/
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void
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dumpstate(struct kvmvars *kvp)
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{
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register FILE *fp;
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struct rawarc rawarc;
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struct tostruct *tos;
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u_long frompc;
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u_short *froms, *tickbuf;
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size_t i;
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int mib[3];
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struct gmonhdr h;
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int fromindex, endfrom, toindex;
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setprof(kvp, GMON_PROF_OFF);
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fp = fopen("gmon.out", "w");
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if (fp == NULL) {
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warn("gmon.out");
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return;
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}
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/*
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* Build the gmon header and write it to a file.
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*/
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bzero(&h, sizeof(h));
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h.lpc = kvp->gpm.lowpc;
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h.hpc = kvp->gpm.highpc;
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h.ncnt = kvp->gpm.kcountsize + sizeof(h);
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h.version = GMONVERSION;
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h.profrate = kvp->gpm.profrate;
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h.histcounter_type = kvp->gpm.histcounter_type;
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fwrite((char *)&h, sizeof(h), 1, fp);
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/*
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* Write out the tick buffer.
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*/
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mib[0] = CTL_KERN;
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mib[1] = KERN_PROF;
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if ((tickbuf = (u_short *)malloc(kvp->gpm.kcountsize)) == NULL)
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errx(5, "cannot allocate kcount space");
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if (kflag) {
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i = kvm_read(kvp->kd, (u_long)kvp->gpm.kcount, (void *)tickbuf,
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kvp->gpm.kcountsize);
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} else {
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mib[2] = GPROF_COUNT;
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i = kvp->gpm.kcountsize;
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if (sysctl(mib, 3, tickbuf, &i, NULL, 0) < 0)
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i = 0;
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}
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if (i != kvp->gpm.kcountsize)
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errx(6, "read ticks: read %lu, got %ld: %s",
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kvp->gpm.kcountsize, (long)i,
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kflag ? kvm_geterr(kvp->kd) : strerror(errno));
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if ((fwrite(tickbuf, kvp->gpm.kcountsize, 1, fp)) != 1)
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err(7, "writing tocks to gmon.out");
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free(tickbuf);
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/*
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* Write out the arc info.
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*/
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if ((froms = (u_short *)malloc(kvp->gpm.fromssize)) == NULL)
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errx(8, "cannot allocate froms space");
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if (kflag) {
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i = kvm_read(kvp->kd, (u_long)kvp->gpm.froms, (void *)froms,
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kvp->gpm.fromssize);
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} else {
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mib[2] = GPROF_FROMS;
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i = kvp->gpm.fromssize;
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if (sysctl(mib, 3, froms, &i, NULL, 0) < 0)
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i = 0;
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}
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if (i != kvp->gpm.fromssize)
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errx(9, "read froms: read %lu, got %ld: %s",
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kvp->gpm.fromssize, (long)i,
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kflag ? kvm_geterr(kvp->kd) : strerror(errno));
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if ((tos = (struct tostruct *)malloc(kvp->gpm.tossize)) == NULL)
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errx(10, "cannot allocate tos space");
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if (kflag) {
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i = kvm_read(kvp->kd, (u_long)kvp->gpm.tos, (void *)tos,
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kvp->gpm.tossize);
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} else {
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mib[2] = GPROF_TOS;
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i = kvp->gpm.tossize;
|
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if (sysctl(mib, 3, tos, &i, NULL, 0) < 0)
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i = 0;
|
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}
|
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if (i != kvp->gpm.tossize)
|
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errx(11, "read tos: read %lu, got %ld: %s",
|
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kvp->gpm.tossize, (long)i,
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kflag ? kvm_geterr(kvp->kd) : strerror(errno));
|
|
if (debug)
|
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warnx("lowpc 0x%lx, textsize 0x%lx",
|
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(unsigned long)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 +
|
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(fromindex * kvp->gpm.hashfraction * sizeof(*froms));
|
|
for (toindex = froms[fromindex]; toindex != 0;
|
|
toindex = tos[toindex].link) {
|
|
if (debug)
|
|
warnx("[mcleanup] frompc 0x%lx selfpc 0x%lx "
|
|
"count %ld", 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);
|
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}
|
|
}
|
|
fclose(fp);
|
|
}
|
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|
|
/*
|
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* Get the profiling rate.
|
|
*/
|
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int
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getprofhz(struct kvmvars *kvp)
|
|
{
|
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size_t size;
|
|
int mib[2], profrate;
|
|
struct clockinfo clockrate;
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|
|
|
if (kflag) {
|
|
profrate = 1;
|
|
if (kvm_read(kvp->kd, nl[N_PROFHZ].n_value, &profrate,
|
|
sizeof profrate) != sizeof profrate)
|
|
warnx("get clockrate: %s", 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)
|
|
warn("get clockrate");
|
|
return (clockrate.profhz);
|
|
}
|
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|
|
/*
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* Reset the kernel profiling date structures.
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*/
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void
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reset(struct kvmvars *kvp)
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{
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char *zbuf;
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u_long biggest;
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int mib[3];
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setprof(kvp, GMON_PROF_OFF);
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biggest = kvp->gpm.kcountsize;
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if (kvp->gpm.fromssize > biggest)
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biggest = kvp->gpm.fromssize;
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if (kvp->gpm.tossize > biggest)
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biggest = kvp->gpm.tossize;
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if ((zbuf = (char *)malloc(biggest)) == NULL)
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errx(12, "cannot allocate zbuf space");
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bzero(zbuf, biggest);
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if (kflag) {
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if (kvm_write(kvp->kd, (u_long)kvp->gpm.kcount, zbuf,
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kvp->gpm.kcountsize) != (ssize_t)kvp->gpm.kcountsize)
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errx(13, "tickbuf zero: %s", kvm_geterr(kvp->kd));
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if (kvm_write(kvp->kd, (u_long)kvp->gpm.froms, zbuf,
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kvp->gpm.fromssize) != (ssize_t)kvp->gpm.fromssize)
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errx(14, "froms zero: %s", kvm_geterr(kvp->kd));
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if (kvm_write(kvp->kd, (u_long)kvp->gpm.tos, zbuf,
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kvp->gpm.tossize) != (ssize_t)kvp->gpm.tossize)
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errx(15, "tos zero: %s", kvm_geterr(kvp->kd));
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return;
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}
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(void)seteuid(0);
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mib[0] = CTL_KERN;
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mib[1] = KERN_PROF;
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mib[2] = GPROF_COUNT;
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if (sysctl(mib, 3, NULL, NULL, zbuf, kvp->gpm.kcountsize) < 0)
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err(13, "tickbuf zero");
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mib[2] = GPROF_FROMS;
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if (sysctl(mib, 3, NULL, NULL, zbuf, kvp->gpm.fromssize) < 0)
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err(14, "froms zero");
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mib[2] = GPROF_TOS;
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if (sysctl(mib, 3, NULL, NULL, zbuf, kvp->gpm.tossize) < 0)
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err(15, "tos zero");
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(void)seteuid(getuid());
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free(zbuf);
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}
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