From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 81231 invoked by alias); 12 Mar 2015 00:08:31 -0000 Mailing-List: contact gdb-patches-help@sourceware.org; run by ezmlm Precedence: bulk List-Id: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: gdb-patches-owner@sourceware.org Received: (qmail 81214 invoked by uid 89); 12 Mar 2015 00:08:31 -0000 Authentication-Results: sourceware.org; auth=none X-Virus-Found: No X-Spam-SWARE-Status: No, score=0.4 required=5.0 tests=AWL,BAYES_00,FREEMAIL_FROM,KAM_FROM_URIBL_PCCC,RCVD_IN_DNSWL_LOW,SPF_PASS autolearn=no version=3.3.2 X-Spam-User: qpsmtpd, 2 recipients X-HELO: mail-pa0-f46.google.com Received: from mail-pa0-f46.google.com (HELO mail-pa0-f46.google.com) (209.85.220.46) by sourceware.org (qpsmtpd/0.93/v0.84-503-g423c35a) with (AES128-GCM-SHA256 encrypted) ESMTPS; Thu, 12 Mar 2015 00:08:30 +0000 Received: by padfa1 with SMTP id fa1so15553510pad.3; Wed, 11 Mar 2015 17:08:28 -0700 (PDT) X-Received: by 10.70.136.34 with SMTP id px2mr83116459pdb.126.1426118908609; Wed, 11 Mar 2015 17:08:28 -0700 (PDT) Received: from bubble.grove.modra.org (CPE-58-160-155-134.oycza5.sa.bigpond.net.au. [58.160.155.134]) by mx.google.com with ESMTPSA id kn5sm7836821pdb.42.2015.03.11.17.08.27 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 11 Mar 2015 17:08:27 -0700 (PDT) Received: by bubble.grove.modra.org (Postfix, from userid 1000) id 9B5B8EA0139; Thu, 12 Mar 2015 10:38:22 +1030 (ACDT) Date: Thu, 12 Mar 2015 00:08:00 -0000 From: Alan Modra To: Michael Eager Cc: "gdb-patches@sourceware.org" , binutils Subject: Re: [PATCH] Support gzip compressed exec and core files in gdb Message-ID: <20150312000822.GA8533@bubble.grove.modra.org> Mail-Followup-To: Michael Eager , "gdb-patches@sourceware.org" , binutils References: <54FF77D6.7010400@eagerm.com> <20150311081454.GK11451@bubble.grove.modra.org> <5500579E.50706@eagerm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <5500579E.50706@eagerm.com> User-Agent: Mutt/1.5.23 (2014-03-12) X-SW-Source: 2015-03/txt/msg00328.txt.bz2 On Wed, Mar 11, 2015 at 07:56:30AM -0700, Michael Eager wrote: > On 03/11/15 01:14, Alan Modra wrote: > >On Tue, Mar 10, 2015 at 04:01:42PM -0700, Michael Eager wrote: > >>This operation cannot be done completely by BFD because BFD allows an opened > >>file to be passed to it for processing. GDB uses this functionality. > > > >I'd prefer you do this entirely outside of BFD, without adding another > >field to struct bfd. I think that can be done by simply clearing > >abfd->cacheable on files you uncompress. This prevents BFD from > >closing the file, so you won't need to open it again. > > GDB closes the exec file, then uses BFD to seek (I think when reading > syms). BFD then re-opens the file, so it needs the name of the > uncompressed file. Really? I think it quite unclean if gdb expects BFD to reopen a file that gdb has closed! -- Alan Modra Australia Development Lab, IBM