From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by sourceware.org (Postfix) with ESMTPS id 5BBB93858C60 for ; Mon, 20 Dec 2021 16:52:56 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.1 sourceware.org 5BBB93858C60 Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-504-s5gSoPlmMSWV5ZtjQhLE0A-1; Mon, 20 Dec 2021 11:52:54 -0500 X-MC-Unique: s5gSoPlmMSWV5ZtjQhLE0A-1 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.phx2.redhat.com [10.5.11.13]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id F04F4801AAB; Mon, 20 Dec 2021 16:52:53 +0000 (UTC) Received: from oldenburg.str.redhat.com (unknown [10.39.192.104]) by smtp.corp.redhat.com (Postfix) with ESMTPS id B1A725E481; Mon, 20 Dec 2021 16:52:52 +0000 (UTC) From: Florian Weimer To: Adhemerval Zanella Cc: libc-alpha@sourceware.org, John Mellor-Crummey , Ben Woodard Subject: Re: [PATCH v6 15/20] elf: Run constructors if executable has a soname of a dependency References: <20211115183734.531155-1-adhemerval.zanella@linaro.org> <20211115183734.531155-16-adhemerval.zanella@linaro.org> <874k75he1l.fsf@oldenburg.str.redhat.com> Date: Mon, 20 Dec 2021 17:52:50 +0100 In-Reply-To: (Adhemerval Zanella's message of "Mon, 20 Dec 2021 13:49:10 -0300") Message-ID: <87v8zjfcbh.fsf@oldenburg.str.redhat.com> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/27.2 (gnu/linux) MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain X-Spam-Status: No, score=-6.3 required=5.0 tests=BAYES_00, DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, RCVD_IN_DNSWL_LOW, RCVD_IN_MSPIKE_H3, RCVD_IN_MSPIKE_WL, SPF_HELO_NONE, SPF_NONE, TXREP autolearn=ham autolearn_force=no version=3.4.4 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on server2.sourceware.org X-BeenThere: libc-alpha@sourceware.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Libc-alpha mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 20 Dec 2021 16:52:57 -0000 * Adhemerval Zanella: >> But if the main program has a soname, wouldn't we stop loading it as a >> dependency, too? So that the expected ouptut turns into: >> >> b>a>{}> >> because the separate c is not actually loaded. > > Right, so if the idea is indeed to not load an dependency that matches the > binary SONAME current behavior is indeed what is expected. Not sure if > this the expected behavior, if so I will drop this patch. Is it the current behavior? I can see some value in preserving that, e.g. for scripting language interpreters which historically avoided DSOs for the core interpreter, preferring position-dependent code for it (but still offering a DSO for embedding). They may even set DT_SONAME on the main program; I haven't checked. Thanks, Florian