From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 4943 invoked by alias); 30 Jul 2018 21:10:44 -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 4918 invoked by uid 89); 30 Jul 2018 21:10:44 -0000 Authentication-Results: sourceware.org; auth=none X-Spam-SWARE-Status: No, score=-3.1 required=5.0 tests=AWL,BAYES_00,RCVD_IN_DNSWL_NONE,SPF_HELO_PASS autolearn=ham version=3.3.2 spammy=Hx-languages-length:1186, our X-HELO: gateway30.websitewelcome.com Received: from gateway30.websitewelcome.com (HELO gateway30.websitewelcome.com) (192.185.150.24) by sourceware.org (qpsmtpd/0.93/v0.84-503-g423c35a) with ESMTP; Mon, 30 Jul 2018 21:10:42 +0000 Received: from cm13.websitewelcome.com (cm13.websitewelcome.com [100.42.49.6]) by gateway30.websitewelcome.com (Postfix) with ESMTP id 677B01CB9A for ; Mon, 30 Jul 2018 16:08:10 -0500 (CDT) Received: from box5379.bluehost.com ([162.241.216.53]) by cmsmtp with SMTP id kFOkfRbQs79N3kFOkflbhn; Mon, 30 Jul 2018 16:08:10 -0500 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=tromey.com; s=default; h=Content-Type:MIME-Version:Message-ID:In-Reply-To:Date: References:Subject:Cc:To:From:Sender:Reply-To:Content-Transfer-Encoding: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help:List-Unsubscribe: List-Subscribe:List-Post:List-Owner:List-Archive; bh=inbcrW65GtL1S4FJxAgl2aMo4qPcMiXLO1bQTzB3OEc=; b=E0UQyNH76x9CyFjRx+spujV3S5 HI502NeEUTbEz9N6K8cRtCd7bExdbXcYETDP6Fbf6jAjXi6rrHOnL4sR5aX3usyeRqJvb0mBvL1lh UXmiMpdogMyPaKI0qDmTDY2b0; Received: from 75-166-85-72.hlrn.qwest.net ([75.166.85.72]:33750 helo=bapiya) by box5379.bluehost.com with esmtpsa (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.91) (envelope-from ) id 1fkFOk-004HRo-5V; Mon, 30 Jul 2018 16:08:10 -0500 From: Tom Tromey To: Joel Brobecker Cc: Philippe Waroquiers , gdb-patches@sourceware.org Subject: Re: [RFA_v4 1/8] Add helper functions parse_flags and parse_flags_qcs References: <20180710213926.32240-1-philippe.waroquiers@skynet.be> <20180710213926.32240-2-philippe.waroquiers@skynet.be> <20180730201556.GA19069@adacore.com> Date: Mon, 30 Jul 2018 21:10:00 -0000 In-Reply-To: <20180730201556.GA19069@adacore.com> (Joel Brobecker's message of "Mon, 30 Jul 2018 13:15:56 -0700") Message-ID: <87pnz4o2iu.fsf@tromey.com> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/26.1.50 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain X-SW-Source: 2018-07/txt/msg00794.txt.bz2 >>>>> "Joel" == Joel Brobecker writes: Joel> | (gdb) command 1 Joel> | Type commands for breakpoint(s) 1, one per line. Joel> | End with a line saying just "end". Joel> | >end Joel> | ==119811== Invalid read of size 1 Joel> | [snip] Joel> | ==119811== Address 0x65c1349 is 9 bytes inside a block of size 10 free'd Joel> Before this patch, no such valgrind error. Joel> We detected this issue, because, with one of our Ada testcase, we actually Joel> get an error: Joel> I will look into tomorrow - this is just a heads up so someone else Joel> doesn't spend time investigating the same issue. Hi Joel. I also found this bug this weekend, while trying out -fsanitize=address. I have a patch for this one. I haven't written the ChangeLog yet but I will try to do it as soon as possible. Actually I have patches to make gdb nearly -fsanitize=address clean; or at least, the ordinary test suite on my machine is down to 1 failure (there are some additional gdbserver failures in bugzilla that I haven't looked at yet). My series also addresses much of -fsanitize=undefined as well. Tom