From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 21628 invoked by alias); 16 Feb 2011 20:32:08 -0000 Mailing-List: contact archer-help@sourceware.org; run by ezmlm Sender: Precedence: bulk List-Post: List-Help: List-Subscribe: List-Id: Received: (qmail 21619 invoked by uid 22791); 16 Feb 2011 20:32:07 -0000 X-SWARE-Spam-Status: No, hits=-6.4 required=5.0 tests=AWL,BAYES_00,RCVD_IN_DNSWL_HI,SPF_HELO_PASS,T_RP_MATCHES_RCVD X-Spam-Check-By: sourceware.org Date: Wed, 16 Feb 2011 20:32:00 -0000 From: Oleg Nesterov To: Roland McGrath Cc: Jan Kratochvil , Project Archer Subject: Re: ptrace improvement: PTRACE_O_INHERIT Message-ID: <20110216202354.GA18694@redhat.com> References: <20110214193052.3EC8D1814BA@magilla.sf.frob.com> <20110214193812.GA20765@redhat.com> <20110215003551.BC1EA1802A2@magilla.sf.frob.com> <20110215130805.GA30742@redhat.com> <20110215214333.GA18086@host1.dyn.jankratochvil.net> <20110215220153.470031806E0@magilla.sf.frob.com> <20110216160209.GA19339@host1.dyn.jankratochvil.net> <20110216182807.CA9491806E0@magilla.sf.frob.com> <20110216195213.GD15576@redhat.com> <20110216200714.C420A18020E@magilla.sf.frob.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20110216200714.C420A18020E@magilla.sf.frob.com> User-Agent: Mutt/1.5.18 (2008-05-17) X-SW-Source: 2011-q1/txt/msg00075.txt.bz2 On 02/16, Roland McGrath wrote: > > > Could you spell please? > > Say a debugger has two threads. > > Thread A calls wait*. > Thread B calls PTRACE_DETACH. > > Thread A can perceive a wait result from tracee T to be simultaneous with, > or after, thread B has detached from T. Ah, yes, sure. I thought you meant that do_wait() (in kernel) can somehow see the tracee after it was already detached. Thanks. Oleg.