From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from simark.ca by simark.ca with LMTP id GKOwKdI2z2AcIAAAWB0awg (envelope-from ) for ; Sun, 20 Jun 2021 08:38:42 -0400 Received: by simark.ca (Postfix, from userid 112) id 9AF971F1F2; Sun, 20 Jun 2021 08:38:42 -0400 (EDT) X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on simark.ca X-Spam-Level: X-Spam-Status: No, score=-1.1 required=5.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,MAILING_LIST_MULTI,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.2 Received: from sourceware.org (server2.sourceware.org [8.43.85.97]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by simark.ca (Postfix) with ESMTPS id 891A61E939 for ; Sun, 20 Jun 2021 08:38:41 -0400 (EDT) Received: from server2.sourceware.org (localhost [IPv6:::1]) by sourceware.org (Postfix) with ESMTP id CD58F385781B for ; Sun, 20 Jun 2021 12:38:40 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org CD58F385781B DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sourceware.org; s=default; t=1624192720; bh=y1kkbumiWM46/4BUoiom0mmKKVTJdj0nQYdBYL8Wxfw=; h=Subject:To:References:Date:In-Reply-To:List-Id:List-Unsubscribe: List-Archive:List-Post:List-Help:List-Subscribe:From:Reply-To:Cc: From; b=BMmPnfUKoQkPFy/pgp29JJRvC0xqAZGEQAduhLsOSbH0ZpQmUanhAFFWV5QDdpRJR ay5BG2PmflXbp+/N+ac7Hsnd+tRQYBtlsrlOi57Ujm408mtiDw3LM8vgOQvy/jpt0y lXLqXvmRDi7WDFxsOd0yjbEp6Kc0KNSyIGKP9DTI= Received: from smtp.polymtl.ca (smtp.polymtl.ca [132.207.4.11]) by sourceware.org (Postfix) with ESMTPS id 7D261385802A; Sun, 20 Jun 2021 12:38:15 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.1 sourceware.org 7D261385802A Received: from simark.ca (simark.ca [158.69.221.121]) (authenticated bits=0) by smtp.polymtl.ca (8.14.7/8.14.7) with ESMTP id 15KCc8S2029447 (version=TLSv1/SSLv3 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Sun, 20 Jun 2021 08:38:13 -0400 DKIM-Filter: OpenDKIM Filter v2.11.0 smtp.polymtl.ca 15KCc8S2029447 Received: from [10.0.0.11] (192-222-157-6.qc.cable.ebox.net [192.222.157.6]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by simark.ca (Postfix) with ESMTPSA id 5C7BE1E939; Sun, 20 Jun 2021 08:38:08 -0400 (EDT) Subject: Re: [PATCH] nptl: Export libthread_db-used symbols under GLIBC_PRIVATE To: Florian Weimer , libc-alpha@sourceware.org References: <877disuwfq.fsf@oldenburg.str.redhat.com> Message-ID: <4df1e03a-eead-82b2-289f-b6cb7ddc0159@polymtl.ca> Date: Sun, 20 Jun 2021 08:38:07 -0400 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.11.0 MIME-Version: 1.0 In-Reply-To: <877disuwfq.fsf@oldenburg.str.redhat.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit X-Poly-FromMTA: (simark.ca [158.69.221.121]) at Sun, 20 Jun 2021 12:38:08 +0000 X-BeenThere: gdb@sourceware.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Gdb mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , From: Simon Marchi via Gdb Reply-To: Simon Marchi Cc: gdb@sourceware.org Errors-To: gdb-bounces+public-inbox=simark.ca@sourceware.org Sender: "Gdb" On 2021-06-17 3:23 p.m., Florian Weimer via Gdb wrote: > Kevin, this *almost* gives us the perfect debugging experience with your > patched GDB in Fedora 35, according to my preliminary tests. A build > with the patch is running here: > > > > However, it seems that GDB still needs pthread_create in the .symtab to > trigger loading of libpthread_db. A fully stripped libc.so.6 without > .symtab does not trigger loading in my experiments. (The other symbols > we preserve for valgrind's sake and are immaterial to GDB.) In other > words, Stupid question, but: since pthread_create is a function exposed by the libc.so shared library, won't there still be an entry for it in .dynsym? And if so, shouldn't GDB see it? Simon