From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from outbound-ss-761.bluehost.com (outbound-ss-761.bluehost.com [74.220.211.250]) by sourceware.org (Postfix) with ESMTPS id 4C92A3853791 for ; Fri, 9 Dec 2022 18:18:38 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.1 sourceware.org 4C92A3853791 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 cmgw12.mail.unifiedlayer.com (unknown [10.0.90.127]) by progateway8.mail.pro1.eigbox.com (Postfix) with ESMTP id B598A1003F8F3 for ; Fri, 9 Dec 2022 18:18:22 +0000 (UTC) Received: from box5379.bluehost.com ([162.241.216.53]) by cmsmtp with ESMTP id 3hx0p9xjL81Zd3hx0pg2mu; Fri, 09 Dec 2022 18:18:22 +0000 X-Authority-Reason: nr=8 X-Authority-Analysis: v=2.4 cv=ZJoSJV3b c=1 sm=1 tr=0 ts=63937bee a=ApxJNpeYhEAb1aAlGBBbmA==:117 a=ApxJNpeYhEAb1aAlGBBbmA==:17 a=dLZJa+xiwSxG16/P+YVxDGlgEgI=:19 a=sHyYjHe8cH0A:10:nop_rcvd_month_year a=Qbun_eYptAEA:10:endurance_base64_authed_username_1 a=CCpqsmhAAAAA:8 a=Ksc0_JRsq7DtuDs3eOgA:9 a=ul9cdbp4aOFLsgKbc677:22 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=FzH80KvQajYTm/eaXFL5vvMOxZhsa/L+rsttAb1Rnec=; b=S88P3NBdmgcUgY9qOTrolpenf1 ZvUvx0HODLdyY1t7Y/KWb+WGJnNUbaDqwFjITgtbQUcnWmmTaGzOTBlEZFGwvNDLEm6/m2oSSY8pS kgfoy4DeGAojzdR1vaod9ZP/G; Received: from 97-122-76-186.hlrn.qwest.net ([97.122.76.186]:56954 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 1p3hx0-004NLH-Cv; Fri, 09 Dec 2022 11:18:22 -0700 From: Tom Tromey To: Andrew Burgess via Gdb-patches Cc: Andrew Burgess , Tom Tromey Subject: Re: [PATCH 2/2] gdb/testsuite: new test for recent dwarf reader issue References: X-Attribution: Tom Date: Fri, 09 Dec 2022 11:18:19 -0700 In-Reply-To: (Andrew Burgess via Gdb-patches's message of "Thu, 8 Dec 2022 15:38:33 +0000") Message-ID: <87lengh250.fsf@tromey.com> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/27.2 (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: 97.122.76.186 X-Source-L: No X-Exim-ID: 1p3hx0-004NLH-Cv X-Source: X-Source-Args: X-Source-Dir: X-Source-Sender: 97-122-76-186.hlrn.qwest.net (murgatroyd) [97.122.76.186]:56954 X-Source-Auth: tom+tromey.com X-Email-Count: 1 X-Source-Cap: ZWx5bnJvYmk7ZWx5bnJvYmk7Ym94NTM3OS5ibHVlaG9zdC5jb20= X-Local-Domain: yes X-Spam-Status: No, score=-3022.3 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: >>>>> "Andrew" == Andrew Burgess via Gdb-patches writes: Thank you for doing this. Andrew> - However, GDB checks each partial symbol using multiple languages, Andrew> not just the current language (C in this case), so, when GDB Andrew> checks using the C++ language, the symbol name is first demangled, Andrew> the code that does this can be found Andrew> lookup_name_info::language_lookup_name. As the demangled form of Andrew> 'signed int' is just 'int', GDB then looks for any symbols with Andrew> the name 'int', most partial symtabs will contain such a symbol, Andrew> so GDB ends up expanding pretty much every symtab. It's a pedantic point but what happens here is name canonicalization, not demangling. Demangling is just used to refer to the translation from a name like "_Zmumble" to "something::else" -- that is, the input is a linkage name and the output is a C++ name. Canonicalization takes a C++ name as input and returns the standard form, basically dealing with the fact that C++ (and as we discovered, C) has multiple possible spellings for some symbols. Tom