From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from gproxy3-pub.mail.unifiedlayer.com (gproxy3-pub.mail.unifiedlayer.com [69.89.30.42]) by sourceware.org (Postfix) with ESMTPS id 179423858414 for ; Fri, 10 Feb 2023 21:12:04 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.2 sourceware.org 179423858414 Authentication-Results: sourceware.org; dmarc=none (p=none dis=none) header.from=tromey.com Authentication-Results: sourceware.org; spf=pass smtp.mailfrom=tromey.com Received: from cmgw13.mail.unifiedlayer.com (unknown [10.0.90.128]) by progateway5.mail.pro1.eigbox.com (Postfix) with ESMTP id 85ACA100482A7 for ; Fri, 10 Feb 2023 21:12:03 +0000 (UTC) Received: from box5379.bluehost.com ([162.241.216.53]) by cmsmtp with ESMTP id QagdpWkJ4NX2aQagdpHewo; Fri, 10 Feb 2023 21:12:03 +0000 X-Authority-Reason: nr=8 X-Authority-Analysis: v=2.4 cv=NMAQR22g c=1 sm=1 tr=0 ts=63e6b323 a=ApxJNpeYhEAb1aAlGBBbmA==:117 a=ApxJNpeYhEAb1aAlGBBbmA==:17 a=dLZJa+xiwSxG16/P+YVxDGlgEgI=:19 a=m04uMKEZRckA:10:nop_rcvd_month_year a=Qbun_eYptAEA:10:endurance_base64_authed_username_1 a=13KGAo4DAAAA:8 a=06c6244JRIxToZlZNWAA:9 a=DdAeqqNASC6T8jxox_Jq:22 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=vOZnnGElzueRWHF2XekfdaenvYJfuoIzKzezRH5o8EY=; b=WYoMZiaOKP7hwvdQMPPtf8e65d RMdwgzYGSNKtGklAqyW71EaGUoa2to2mKkFmFUrYkMUAji2MZqM5bY10cSyANvuhXmb6dCk0EY7H7 kIsTQvlALk+G0YiCo0EqsAy+J; Received: from 75-166-130-93.hlrn.qwest.net ([75.166.130.93]:38942 helo=murgatroyd) by box5379.bluehost.com with esmtpsa (TLS1.2) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.95) (envelope-from ) id 1pQagd-004OUK-3y; Fri, 10 Feb 2023 14:12:03 -0700 From: Tom Tromey To: "Maciej W. Rozycki" Cc: Tom Tromey , gdb-patches@sourceware.org, Andrew Burgess , Richard Bunt Subject: Re: [PATCH v3 3/5] GDB: Only make data actually retrieved into value history available References: <87fsbqlewl.fsf@tromey.com> X-Attribution: Tom Date: Fri, 10 Feb 2023 14:11:58 -0700 In-Reply-To: (Maciej W. Rozycki's message of "Fri, 10 Feb 2023 14:18:14 +0000 (GMT)") Message-ID: <87357dxm1t.fsf@tromey.com> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/28.2 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - box5379.bluehost.com X-AntiAbuse: Original Domain - sourceware.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - tromey.com X-BWhitelist: no X-Source-IP: 75.166.130.93 X-Source-L: No X-Exim-ID: 1pQagd-004OUK-3y X-Source: X-Source-Args: X-Source-Dir: X-Source-Sender: 75-166-130-93.hlrn.qwest.net (murgatroyd) [75.166.130.93]:38942 X-Source-Auth: tom+tromey.com X-Email-Count: 3 X-Source-Cap: ZWx5bnJvYmk7ZWx5bnJvYmk7Ym94NTM3OS5ibHVlaG9zdC5jb20= X-Local-Domain: yes X-Spam-Status: No, score=-3021.4 required=5.0 tests=BAYES_00,DKIM_SIGNED,DKIM_VALID,JMQ_SPF_NEUTRAL,RCVD_IN_DNSWL_NONE,RCVD_IN_MSPIKE_H2,SPF_HELO_NONE,SPF_PASS,TXREP autolearn=no autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on server2.sourceware.org List-Id: >>>>> "Maciej" == Maciej W Rozycki writes: >> I'm struggling to understand why this is needed. >> Like it seems to me that a value should always report that bytes outside >> of its content range are unavailable. Maciej> I have investigated whether a check based solely on the length of the Maciej> data type associated with the value recorded would do, but that triggered Maciej> Python regressions: Interesting, thanks. I guess the issue here is we don't know how big the value should be in the "struct hack" case. Tom