1.\" $NetBSD: utrace.2,v 1.11 2003/04/24 12:17:49 wiz Exp $ 2.\" 3.\" Copyright (c) 2000 The NetBSD Foundation, Inc. 4.\" All rights reserved. 5.\" 6.\" This code is derived from software contributed to The NetBSD Foundation 7.\" by Gregory McGarry <g.mcgarry@ieee.org>. 8.\" 9.\" Redistribution and use in source and binary forms, with or without 10.\" modification, are permitted provided that the following conditions 11.\" are met: 12.\" 1. Redistributions of source code must retain the above copyright 13.\" notice, this list of conditions and the following disclaimer. 14.\" 2. Redistributions in binary form must reproduce the above copyright 15.\" notice, this list of conditions and the following disclaimer in the 16.\" documentation and/or other materials provided with the distribution. 17.\" 3. All advertising materials mentioning features or use of this software 18.\" must display the following acknowledgement: 19.\" This product includes software developed by the NetBSD 20.\" Foundation, Inc. and its contributors. 21.\" 4. Neither the name of The NetBSD Foundation nor the names of its 22.\" contributors may be used to endorse or promote products derived 23.\" from this software without specific prior written permission. 24.\" 25.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 26.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 27.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 28.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 29.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 30.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 31.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 32.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 33.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 34.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 35.\" 36.\" $FreeBSD: src/lib/libc/sys/utrace.2,v 1.3 2004/07/03 23:14:34 ru Exp $ 37.\" 38.Dd November 24, 2019 39.Dt UTRACE 2 40.Os 41.Sh NAME 42.Nm utrace 43.Nd insert user record in ktrace log 44.Sh LIBRARY 45.Lb libc 46.Sh SYNOPSIS 47.In sys/types.h 48.In sys/param.h 49.In sys/time.h 50.In sys/ktrace.h 51.Ft int 52.Fn utrace "const void *addr" "size_t len" 53.Sh DESCRIPTION 54Adds a record to the process trace with information supplied by user. 55The record contains 56.Fa len 57bytes from memory pointed to by 58.Fa addr . 59This call only has an effect if the calling process is being traced. 60.Sh RETURN VALUES 61.Rv -std 62.Sh ERRORS 63.Bl -tag -width Er 64.It Bq Er EINVAL 65Specified data length 66.Fa len 67was bigger than 68.Dv KTR_USER_MAXLEN . 69.It Bq Er ENOSYS 70Currently running kernel was compiled without 71.Xr ktrace 2 72support 73.Pq Cd "options KTRACE" . 74.El 75.Sh SEE ALSO 76.Xr kdump 1 , 77.Xr ktrace 1 , 78.Xr ktrace 2 79.Sh HISTORY 80The 81.Fn utrace 82system call first appeared in 83.Fx 2.2 . 84