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 [170.10.129.124]) by sourceware.org (Postfix) with ESMTPS id C044A38582B6 for ; Mon, 15 Aug 2022 14:30:33 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.1 sourceware.org C044A38582B6 Received: from mimecast-mx02.redhat.com (mx3-rdu2.redhat.com [66.187.233.73]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-93-kZDMcB34MaK2ztd0wZjPsQ-1; Mon, 15 Aug 2022 10:30:31 -0400 X-MC-Unique: kZDMcB34MaK2ztd0wZjPsQ-1 Received: from smtp.corp.redhat.com (int-mx10.intmail.prod.int.rdu2.redhat.com [10.11.54.10]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 861A73C0ED43 for ; Mon, 15 Aug 2022 14:30:31 +0000 (UTC) Received: from oldenburg.str.redhat.com (unknown [10.39.192.36]) by smtp.corp.redhat.com (Postfix) with ESMTPS id E081E492C3B for ; Mon, 15 Aug 2022 14:30:30 +0000 (UTC) From: Florian Weimer To: libc-alpha@sourceware.org Subject: [PATCH 0/3] Forced ordering for DFS ELF dependency sorting (bug 28937) X-From-Line: a95aec1afdeead3d59ab1b8a71b4224fb490321f Mon Sep 17 00:00:00 2001 Message-Id: Date: Mon, 15 Aug 2022 16:30:29 +0200 User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/27.2 (gnu/linux) MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.85 on 10.11.54.10 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain X-Spam-Status: No, score=-5.6 required=5.0 tests=BAYES_00, DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, RCVD_IN_DNSWL_LOW, SPF_HELO_NONE, SPF_NONE, TXREP, T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) 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, 15 Aug 2022 14:30:35 -0000 An Arch Linux test case showed that in some cases, dlclose could unload mappings that are still in use. Triggering this requires dependency cycles, which is why I think this is somewhat rare. Tested on i686-linux-gnu and x86_64-linux-gnu. Thanks, Florian Florian Weimer (3): scripts/dso-ordering-test.py: Generate program run-time dependencies elf: Rename _dl_sort_maps parameter from skip to force_first elf: Implement force_first handling in _dl_sort_maps_dfs elf/dl-sort-maps.c | 47 ++++++++++++++++++++++++------------ elf/dso-sort-tests-1.def | 7 ++++++ scripts/dso-ordering-test.py | 14 +++++------ sysdeps/generic/ldsodefs.h | 6 +++-- 4 files changed, 50 insertions(+), 24 deletions(-) base-commit: 453b88efe6fa79f5c7c6fccc3a520c75fdd43074 -- 2.37.1