From owner-freebsd-dtrace@freebsd.org  Fri Sep 11 08:33:03 2015
Return-Path: <owner-freebsd-dtrace@freebsd.org>
Delivered-To: freebsd-dtrace@mailman.ysv.freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org
 [IPv6:2001:1900:2254:206a::19:1])
 by mailman.ysv.freebsd.org (Postfix) with ESMTP id C767B9BFA13
 for <freebsd-dtrace@mailman.ysv.freebsd.org>;
 Fri, 11 Sep 2015 08:33:03 +0000 (UTC) (envelope-from avg@FreeBSD.org)
Received: from citadel.icyb.net.ua (citadel.icyb.net.ua [212.40.38.140])
 by mx1.freebsd.org (Postfix) with ESMTP id D8D0319A7;
 Fri, 11 Sep 2015 08:32:59 +0000 (UTC) (envelope-from avg@FreeBSD.org)
Received: from porto.starpoint.kiev.ua (porto-e.starpoint.kiev.ua
 [212.40.38.100])
 by citadel.icyb.net.ua (8.8.8p3/ICyb-2.3exp) with ESMTP id LAA00800;
 Fri, 11 Sep 2015 11:32:55 +0300 (EEST)
 (envelope-from avg@FreeBSD.org)
Received: from localhost ([127.0.0.1])
 by porto.starpoint.kiev.ua with esmtp (Exim 4.34 (FreeBSD))
 id 1ZaJlP-000KLk-5z; Fri, 11 Sep 2015 11:32:55 +0300
Subject: Re: Dtrace in a jail
To: "freebsd-dtrace@freebsd.org" <freebsd-dtrace@FreeBSD.org>
References: <CAOc73CAOVcbD8KXGA5S6jkx4MqX-zRWWWh0h1PDCFeF7dCbhqQ@mail.gmail.com>
 <CAFMmRNzOjDM1dcUF3rHfDRBzyfuZAqNB4=AuhT0wmGZ-uLALYw@mail.gmail.com>
 <20150911045446.GA55832@raichu>
From: Andriy Gapon <avg@FreeBSD.org>
X-Enigmail-Draft-Status: N1110
Message-ID: <55F29179.7030305@FreeBSD.org>
Date: Fri, 11 Sep 2015 11:31:53 +0300
User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:38.0) Gecko/20100101
 Thunderbird/38.2.0
MIME-Version: 1.0
In-Reply-To: <20150911045446.GA55832@raichu>
Content-Type: text/plain; charset=windows-1252
Content-Transfer-Encoding: 7bit
X-BeenThere: freebsd-dtrace@freebsd.org
X-Mailman-Version: 2.1.20
Precedence: list
List-Id: "A discussion list for developers working on DTrace in FreeBSD."
 <freebsd-dtrace.freebsd.org>
List-Unsubscribe: <https://lists.freebsd.org/mailman/options/freebsd-dtrace>, 
 <mailto:freebsd-dtrace-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-dtrace/>
List-Post: <mailto:freebsd-dtrace@freebsd.org>
List-Help: <mailto:freebsd-dtrace-request@freebsd.org?subject=help>
List-Subscribe: <https://lists.freebsd.org/mailman/listinfo/freebsd-dtrace>,
 <mailto:freebsd-dtrace-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Fri, 11 Sep 2015 08:33:03 -0000

On 11/09/2015 07:54, Mark Johnston wrote:
> A copy of the kernel binary needs to be available too: the kernel's CTF
> section is not automatically mapped into memory during boot, but is
> loaded upon first use. CTF isn't strictly needed to use DTrace, though.

[Off-topic]

Pity that we do not have /dev/ksyms that exposes the actual (in-memory) kernel
layout as an ELF object.
Also, it's a pity that our crashdump format does not provide for saving a kernel
along a memory dump (esp. given that a size of the former << a size of the latter).

-- 
Andriy Gapon