d6fb489498
system call information such as system call arguments. Initially this will consist of pulling duplicated code out of truss and kdump though it may prove useful for other utilities in the future. This commit moves the shared utrace(2) record parser out of kdump into the library and updates kdump and truss to use it. One difference from the previous version is that the library version treats unknown events that start with the "RTLD" signature as unknown events. This simplifies the interface and allows the consumer to decide how to handle all non-recognized events. Instead, this function only generates a string description for known malloc() and RTLD records. Reviewed by: bdrewery Differential Revision: https://reviews.freebsd.org/D4537
81 lines
2.4 KiB
Groff
81 lines
2.4 KiB
Groff
.\" $NetBSD: utrace.2,v 1.11 2003/04/24 12:17:49 wiz 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 Gregory McGarry <g.mcgarry@ieee.org>.
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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 AUTHOR ``AS IS'' AND ANY EXPRESS OR
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.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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.\"
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.\" $FreeBSD$
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.\"
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.Dd December 11, 2015
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.Dt UTRACE 2
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.Os
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.Sh NAME
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.Nm utrace
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.Nd insert user record in ktrace log
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.Sh LIBRARY
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.Lb libc
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.Sh SYNOPSIS
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.In sys/param.h
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.In sys/time.h
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.In sys/uio.h
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.In sys/ktrace.h
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.Ft int
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.Fn utrace "const void *addr" "size_t len"
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.Sh DESCRIPTION
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Adds a record to the process trace with information supplied by user.
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The record contains
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.Fa len
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bytes from memory pointed to by
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.Fa addr .
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This call only has an effect if the calling process is being traced.
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.Sh RETURN VALUES
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.Rv -std
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.Sh ERRORS
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.Bl -tag -width Er
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.It Bq Er EINVAL
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Specified data length
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.Fa len
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was bigger than
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.Dv KTR_USER_MAXLEN .
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.It Bq Er ENOMEM
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Insufficient memory to honor the request.
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.It Bq Er ENOSYS
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Currently running kernel was compiled without
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.Xr ktrace 2
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support
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.Pq Cd "options KTRACE" .
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.El
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.Sh SEE ALSO
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.Xr kdump 1 ,
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.Xr ktrace 1 ,
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.Xr ktrace 2 ,
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.Xr truss 1 ,
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.Xr sysdecode_utrace 3
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.Sh HISTORY
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The
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.Fn utrace
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system call first appeared in
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.Fx 2.2 .
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