From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 16364 invoked by alias); 24 Oct 2013 19:55:28 -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 16350 invoked by uid 89); 24 Oct 2013 19:55:27 -0000 Authentication-Results: sourceware.org; auth=none X-Virus-Found: No X-Spam-SWARE-Status: No, score=-3.6 required=5.0 tests=AWL,BAYES_00,RP_MATCHES_RCVD,SPF_HELO_PASS,SPF_PASS autolearn=ham version=3.3.2 X-HELO: mx1.redhat.com Received: from mx1.redhat.com (HELO mx1.redhat.com) (209.132.183.28) by sourceware.org (qpsmtpd/0.93/v0.84-503-g423c35a) with ESMTP; Thu, 24 Oct 2013 19:55:26 +0000 Received: from int-mx11.intmail.prod.int.phx2.redhat.com (int-mx11.intmail.prod.int.phx2.redhat.com [10.5.11.24]) by mx1.redhat.com (8.14.4/8.14.4) with ESMTP id r9OJtAij016619 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK); Thu, 24 Oct 2013 15:55:10 -0400 Received: from barimba (ovpn-113-54.phx2.redhat.com [10.3.113.54]) by int-mx11.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id r9OJt9G6011657 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES128-SHA bits=128 verify=NO); Thu, 24 Oct 2013 15:55:10 -0400 From: Tom Tromey To: Sanimir Agovic Cc: gdb-patches@sourceware.org Subject: Re: [PATCH 05/10] vla: allow side effects for sizeof argument References: <1382366424-21010-1-git-send-email-sanimir.agovic@intel.com> <1382366424-21010-6-git-send-email-sanimir.agovic@intel.com> Date: Thu, 24 Oct 2013 19:55:00 -0000 In-Reply-To: <1382366424-21010-6-git-send-email-sanimir.agovic@intel.com> (Sanimir Agovic's message of "Mon, 21 Oct 2013 16:40:19 +0200") Message-ID: <87d2mua1gi.fsf@fleche.redhat.com> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.3 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain X-SW-Source: 2013-10/txt/msg00769.txt.bz2 >>>>> "Sanimir" == Sanimir Agovic writes: Sanimir> C99 requires the sizeof operator to be evaluated at runtime to compute Sanimir> the size of the vla, reflect this behavior in gdb. Sanimir> - val = evaluate_subexp (NULL_TYPE, exp, pos, EVAL_AVOID_SIDE_EFFECTS); Sanimir> + val = evaluate_subexp (NULL_TYPE, exp, pos, EVAL_NORMAL); I think this will do the wrong thing for cases like (assuming "int x"): (gdb) print sizeof (x++) I think some other approach will be needed for this patch. Tom