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From: Tejun Heo <tj@kernel.org>
To: Pavel Emelyanov <xemul@parallels.com>,
	Nathan Lynch <ntl@pobox.com>, Oren Laadan <orenl@cs.columbia.edu>,
	Daniel Lezcano <dlezcano@fr.ibm.com>,
	Serge Hallyn <serue@us.ibm.com>,
	Cyrill Gorcunov <gorcunov@gmail.com>,
	Glauber Costa <glommer@parallels.com>,
	Oleg Nesterov <oleg@redhat.com>,
	Andrew Morton <akpm@linux-foundation.org>
Cc: Linux Containers <containers@lists.osdl.org>,
	linux-kernel@vger.kernel.org
Subject: Re: [EXAMPLE CODE] Parasite thread injection using PTRACE_SEIZE and friends
Date: Wed, 20 Jul 2011 16:03:35 +0200	[thread overview]
Message-ID: <20110720140335.GN3455@htj.dyndns.org> (raw)
In-Reply-To: <20110720140037.GM3455@htj.dyndns.org>

On Wed, Jul 20, 2011 at 04:00:37PM +0200, Tejun Heo wrote:
> With new ptrace requests, a process can be captured and manipulated
> practically transparently.  Other than syscall retry or -EINTR failure
> in special cases and timing difference, everything including job
> control stop state stays transparent across ptrace operations.

Ooh, forgot to mention something.  The ptracer can also reliably
determine whether job control stop is in effect or not, so the whole
job control state can be captured.

Thanks.

-- 
tejun

  reply	other threads:[~2011-07-20 14:03 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-07-20 14:00 Tejun Heo
2011-07-20 14:03 ` Tejun Heo [this message]
2011-07-20 14:21   ` Serge Hallyn
2011-07-20 14:23     ` Tejun Heo
2011-07-22 23:19 ` Matt Helsley
2011-07-23  2:10   ` Tejun Heo

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