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Date: Wed, 2 Mar 2011 08:28:48 +0100
From: Tejun Heo <tj@kernel.org>
To: Denys Vlasenko <vda.linux@googlemail.com>
Cc: Jan Kratochvil <jan.kratochvil@redhat.com>,
        Oleg Nesterov <oleg@redhat.com>, Roland McGrath <roland@redhat.com>,
        linux-kernel@vger.kernel.org, torvalds@linux-foundation.org,
        akpm@linux-foundation.org
Subject: Re: [RFC] Proposal for ptrace improvements
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Hello,

On Tue, Mar 01, 2011 at 11:14:14PM +0100, Denys Vlasenko wrote:
> There may be reasons to have PTRACE_SEIZE operation split like that.
> For one, this allows debugger to do PTRACE_CONT, and later issue
> PTRACE_INTERRUPT to stop the tracee again. PTRACE_INTERRUPT stop may
> be better for some scenarios where debugger wants to make the stop
> invisible to the parent, or when debugger wants to stop just one
> thread of the process.

PTRACE_SEIZE can be used like PTRACE_INTERRUPT.  It works whether the
tracee is attached or not.

Thanks.

-- 
tejun
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