From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 379 invoked by alias); 25 Mar 2004 20:22:18 -0000 Mailing-List: contact gdb-patches-help@sources.redhat.com; run by ezmlm Precedence: bulk List-Subscribe: List-Archive: List-Post: List-Help: , Sender: gdb-patches-owner@sources.redhat.com Received: (qmail 371 invoked from network); 25 Mar 2004 20:22:17 -0000 Received: from unknown (HELO mx1.redhat.com) (66.187.233.31) by sources.redhat.com with SMTP; 25 Mar 2004 20:22:17 -0000 Received: from int-mx1.corp.redhat.com (int-mx1.corp.redhat.com [172.16.52.254]) by mx1.redhat.com (8.12.10/8.12.10) with ESMTP id i2PKMHWA007556 for ; Thu, 25 Mar 2004 15:22:17 -0500 Received: from pobox.toronto.redhat.com (pobox.toronto.redhat.com [172.16.14.4]) by int-mx1.corp.redhat.com (8.11.6/8.11.6) with ESMTP id i2PKMGj10674; Thu, 25 Mar 2004 15:22:16 -0500 Received: from touchme.toronto.redhat.com (IDENT:postfix@touchme.toronto.redhat.com [172.16.14.9]) by pobox.toronto.redhat.com (8.12.8/8.12.8) with ESMTP id i2PKMEf7012197; Thu, 25 Mar 2004 15:22:16 -0500 Received: from redhat.com (toocool.toronto.redhat.com [172.16.14.72]) by touchme.toronto.redhat.com (Postfix) with ESMTP id 08F8E8000DA; Thu, 25 Mar 2004 15:22:14 -0500 (EST) Message-ID: <40633F75.5010908@redhat.com> Date: Thu, 25 Mar 2004 20:22:00 -0000 From: Jeff Johnston User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.4) Gecko/20030624 Netscape/7.1 MIME-Version: 1.0 To: Daniel Jacobowitz Cc: gdb-patches@sources.redhat.com Subject: Re: [RFC]: fix for recycled thread ids References: <405B3F83.4030503@redhat.com> <20040319190126.GA16950@nevyn.them.org> <405B4B8C.2060801@redhat.com> <20040319194011.GA18776@nevyn.them.org> <405B66F4.4090101@redhat.com> <20040324155130.GA27748@nevyn.them.org> <20040324165625.GA10256@nevyn.them.org> <4062041F.1010302@redhat.com> <40622BEF.8030403@redhat.com> <20040325043950.GA13188@nevyn.them.org> <20040325163437.GA15238@nevyn.them.org> In-Reply-To: <20040325163437.GA15238@nevyn.them.org> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit X-SW-Source: 2004-03/txt/msg00632.txt.bz2 Daniel Jacobowitz wrote: > On Wed, Mar 24, 2004 at 11:39:50PM -0500, Daniel Jacobowitz wrote: > >>Do you have any code for PTRACE_EVENT_CLONE yet, or should I put >>something together in the morning to verify whether that's the problem? > > > Here you go. Again, this patch is obviously not ready to go into GDB, > but I have not been able to make it misbehave yet. I don't know if all > the bits it needs work right in RHEL3, or if my testing was conclusive. > > The highlights: > - Includes most of the previous patch > - Uses PTRACE_EVENT_CLONE to attach to new threads > - Moves handling of events closer to the waitpid call > > There are some potential races but I haven't hit any of them in > practice. I suspect that with a heavy fork or vfork load (not clone) > you could produce interesting failure modes. > > Give it a try, please. If it works I'll clean it up. > Works great. I was unable to get it to misbehave on RHEL3. Please go ahead cleaning it up. -- Jeff J.