128 lines
3.8 KiB
Groff
128 lines
3.8 KiB
Groff
.\" $NetBSD: kdump.1,v 1.30 2020/04/02 08:35:12 wiz Exp $
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.\"
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.\" Copyright (c) 1990, 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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.\" @(#)kdump.1 8.1 (Berkeley) 6/6/93
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.\"
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.Dd April 2, 2020
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.Dt KDUMP 1
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.Os
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.Sh NAME
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.Nm kdump
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.Nd display kernel trace data
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.Sh SYNOPSIS
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.Nm
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.Op Fl dElNnRT
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.Op Fl e Ar emulation
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.Op Fl f Ar file
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.Op Fl m Ar maxdata
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.Op Fl p Ar pid
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.Op Fl t Ar trstr
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.Op Fl x | Fl X Ar size
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.Op Ar file
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.Sh DESCRIPTION
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.Nm
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displays the kernel trace files produced with
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.Xr ktrace 1
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in human readable format.
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The file
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.Pa ktrace.out
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in the current directory is displayed, unless either the
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.Fl f
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option is used, or a file name is supplied as the last argument.
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.Pp
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The options are as follows:
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.Bl -tag -width Fl
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.It Fl d
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Display all numbers in decimal.
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.It Fl E
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Display elapsed timestamps (time since beginning of trace).
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.It Fl e Ar emulation
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If an emulation of a process is unknown,
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interpret system call maps assuming the named emulation instead of
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default "netbsd".
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.It Fl f Ar file
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Display the specified file instead of
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.Pa ktrace.out .
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.It Fl l
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Loop reading the trace file, once the end-of-file is reached, waiting for
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more data.
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.It Fl m Ar maxdata
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Display at most
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.Ar maxdata
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bytes when decoding I/O.
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.It Fl N
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Suppress system call number-to-name translation.
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.It Fl n
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Suppress ad hoc translations.
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Normally
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.Nm
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tries to decode many system calls into a more human readable format.
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For example,
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.Xr ioctl 2
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values are replaced with the macro name and
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.Va errno
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values are replaced with the
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.Xr strerror 3
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string.
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Suppressing this feature yields a more consistent output format and is
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easily amenable to further processing.
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.It Fl p Ar pid
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Only display records from the trace file that are for the indicated pid.
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.It Fl R
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Display relative timestamps (time since previous entry).
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.It Fl T
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Display absolute timestamps for each entry (seconds since epoch).
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.It Fl t Ar trstr
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Restrict display to the specified set of kernel trace points.
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The default is to display everything in the file.
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See the
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.Fl t
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option of
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.Xr ktrace 1 .
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.It Fl x
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Display GIO data in hex and ascii instead of
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.Xr vis 3
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format.
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.It Fl X Ar size
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Same as
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.Fl x
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but display hex values by groups of
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.Ar size
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bytes.
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Supported values are 1, 2, 4, 8, and 16.
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.El
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.Sh SEE ALSO
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.Xr ioctlprint 1 ,
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.Xr ktrace 1
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.Sh HISTORY
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The
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.Nm
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command appears in
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.Bx 4.4 .
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