From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gcc-return-155960-listarch-gcc=gcc.gnu.org@gcc.gnu.org>
Received: (qmail 10772 invoked by alias); 15 Aug 2009 07:31:44 -0000
Received: (qmail 10691 invoked by uid 22791); 15 Aug 2009 07:31:42 -0000
X-SWARE-Spam-Status: No, hits=-2.4 required=5.0 	tests=AWL,BAYES_00
X-Spam-Check-By: sourceware.org
Received: from smtp22.services.sfr.fr (HELO smtp22.services.sfr.fr) (93.17.128.11)     by sourceware.org (qpsmtpd/0.43rc1) with ESMTP; Sat, 15 Aug 2009 07:31:37 +0000
Received: from filter.sfr.fr (localhost [127.0.0.1]) 	by msfrf2223.sfr.fr (SMTP Server) with ESMTP id 6D63F7000087; 	Sat, 15 Aug 2009 09:31:34 +0200 (CEST)
Received: from [192.168.1.101] (197.156.90-79.rev.gaoland.net [79.90.156.197]) 	by msfrf2223.sfr.fr (SMTP Server) with ESMTP id DA8827000084; 	Sat, 15 Aug 2009 09:31:33 +0200 (CEST)
X-SFR-UUID: 20090815073133895.DA8827000084@msfrf2223.sfr.fr
Subject: Re: Need some Unix and /bin/sh expertise for GCC testsuite
From: Laurent GUERBY <laurent@guerby.net>
Reply-To: laurent@guerby.net
To: Ralf Wildenhues <Ralf.Wildenhues@gmx.de>
Cc: gcc <gcc@gcc.gnu.org>, Paolo Bonzini <bonzini@gnu.org>, Arnaud Charlet <charlet@adacore.com>, Eric Botcazou <ebotcazou@adacore.com>, Dave Korn <dave.korn.cygwin@googlemail.com>
In-Reply-To: <20090815055330.GA30643@gmx.de>
References: <1250283155.20287.116.camel@localhost> 	 <20090814212503.GA1032@gmx.de> <1250285509.20287.129.camel@localhost> 	 <20090815055330.GA30643@gmx.de>
Content-Type: text/plain
Date: Sat, 15 Aug 2009 14:12:00 -0000
Message-Id: <1250321492.20287.157.camel@localhost>
Mime-Version: 1.0
Content-Transfer-Encoding: 7bit
X-IsSubscribed: yes
Mailing-List: contact gcc-help@gcc.gnu.org; run by ezmlm
Precedence: bulk
List-Id: <gcc.gcc.gnu.org>
List-Archive: <http://gcc.gnu.org/ml/gcc/>
List-Post: <mailto:gcc@gcc.gnu.org>
List-Help: <http://gcc.gnu.org/ml/>
Sender: gcc-owner@gcc.gnu.org
X-SW-Source: 2009-08/txt/msg00258.txt.bz2

On Sat, 2009-08-15 at 07:53 +0200, Ralf Wildenhues wrote:
> > > * Laurent GUERBY wrote on Fri, Aug 14, 2009 at 10:52:35PM CEST:
> > > > => gcc/testsuite/ada/acats/run_all.sh
> > > 
> > > > 3/ Here is the point I find surprising: the "ps fauxww" run in the
> > > > second "if" show that even if the script is fully sequential
> > > > at least one gnatmake subprocess (collect-ld) is still marked as running 
> > > > *in parallel* with the ps command in the subsequent "if" of the script!
> 
> Sounds like http://thread.gmane.org/gmane.comp.shells.bash.bugs/11990
> and the NEWS for bash-3.2 contains this entry:
> 
> l.  Several fixes to the code that manages the list of terminated jobs and
>     their exit statuses, and the list of active and recently-terminated jobs
>     to avoid pid aliasing/wraparound and allocation errors.
> 
> I'd try out a newer bash version.

Good catch! The script shown in the discussion is just like mine and the
order of magnitude of occurrence is the same.

Since upgrading bash will not be an option for everyone, I will propose
a patch that "sleep" a bit if gnatmake succeeds and the executable is
still not present or empty, I'm testing:

      # workaround bash process management bug
      trycount=0
      while [ $trycount -le 30 ]; do
          trycount=$(expr $trycount + 1)
          if [ -s $dir/tests/$chapter/$i/$binmain -a -x $dir/tests/$chapter/$i/$binmain ]; then
             break
          else
             sleep 1
          fi
      done

Thanks again for your help,

Laurent