From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gdb-patches-return-63829-listarch-gdb-patches=sources.redhat.com@sourceware.org>
Received: (qmail 17628 invoked by alias); 19 May 2009 06:26:16 -0000
Received: (qmail 17619 invoked by uid 22791); 19 May 2009 06:26:16 -0000
X-SWARE-Spam-Status: No, hits=-1.8 required=5.0 	tests=AWL,BAYES_00,SARE_MSGID_LONG40,SPF_PASS
X-Spam-Check-By: sourceware.org
Received: from smtp-out.google.com (HELO smtp-out.google.com) (216.239.45.13)     by sourceware.org (qpsmtpd/0.43rc1) with ESMTP; Tue, 19 May 2009 06:26:11 +0000
Received: from zps77.corp.google.com (zps77.corp.google.com [172.25.146.77]) 	by smtp-out.google.com with ESMTP id n4J6Q9UZ028841 	for <gdb-patches@sourceware.org>; Mon, 18 May 2009 23:26:09 -0700
Received: from yw-out-2324.google.com (ywt2.prod.google.com [10.192.20.2]) 	by zps77.corp.google.com with ESMTP id n4J6Q7CK005279 	for <gdb-patches@sourceware.org>; Mon, 18 May 2009 23:26:08 -0700
Received: by yw-out-2324.google.com with SMTP id 2so2182065ywt.47         for <gdb-patches@sourceware.org>; Mon, 18 May 2009 23:26:07 -0700 (PDT)
MIME-Version: 1.0
Received: by 10.90.71.16 with SMTP id t16mr3779535aga.58.1242714367407; Mon,  	18 May 2009 23:26:07 -0700 (PDT)
In-Reply-To: <200905181813.48596.pedro@codesourcery.com>
References: <200905181813.48596.pedro@codesourcery.com>
Date: Tue, 19 May 2009 06:26:00 -0000
Message-ID: <e394668d0905182326r7e481761o28d5445c9362bc05@mail.gmail.com>
Subject: Re: Workaround for glibc/BZ5983: following a child fork shows stale  	parent threads in the child.
From: Doug Evans <dje@google.com>
To: Pedro Alves <pedro@codesourcery.com>
Cc: gdb-patches@sourceware.org
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: quoted-printable
X-System-Of-Record: true
X-IsSubscribed: yes
Mailing-List: contact gdb-patches-help@sourceware.org; run by ezmlm
Precedence: bulk
List-Id: <gdb-patches.sourceware.org>
List-Subscribe: <mailto:gdb-patches-subscribe@sourceware.org>
List-Archive: <http://sourceware.org/ml/gdb-patches/>
List-Post: <mailto:gdb-patches@sourceware.org>
List-Help: <mailto:gdb-patches-help@sourceware.org>, <http://sourceware.org/ml/#faqs>
Sender: gdb-patches-owner@sourceware.org
X-SW-Source: 2009-05/txt/msg00392.txt.bz2

On Mon, May 18, 2009 at 10:13 AM, Pedro Alves <pedro@codesourcery.com> wrot=
e:
> [...]
> + =A0 =A0 =A0while (fgets (buf, sizeof (buf), status_file))
> + =A0 =A0 =A0 {
> + =A0 =A0 =A0 =A0 if (strncmp (buf, "Tgid:", 5) =3D=3D 0)
> + =A0 =A0 =A0 =A0 =A0 {
> + =A0 =A0 =A0 =A0 =A0 =A0 tgid =3D strtoul (buf + strlen ("Tgid:"), NULL,=
 10);
> + =A0 =A0 =A0 =A0 =A0 =A0 break;
> + =A0 =A0 =A0 =A0 =A0 }
> + =A0 =A0 =A0 }

This works, but only because of an assumption of the strlen including
the trailing NUL in "Tgid:" consuming the TAB between "Tgid:" and the
number.
We should probably document that (or make the parsing more robust).