From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on dcvr.yhbt.net X-Spam-Level: X-Spam-ASN: AS3215 2.6.0.0/16 X-Spam-Status: No, score=-4.3 required=3.0 tests=AWL,BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI,SPF_HELO_PASS,SPF_PASS shortcircuit=no autolearn=ham autolearn_force=no version=3.4.2 Received: from sourceware.org (server2.sourceware.org [IPv6:2620:52:3:1:0:246e:9693:128c]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by dcvr.yhbt.net (Postfix) with ESMTPS id 1E0371F8C6 for ; Thu, 26 Aug 2021 10:08:37 +0000 (UTC) Received: from server2.sourceware.org (localhost [IPv6:::1]) by sourceware.org (Postfix) with ESMTP id 1F888385800B for ; Thu, 26 Aug 2021 10:08:36 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 1F888385800B DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sourceware.org; s=default; t=1629972516; bh=qcbgz82nzLhlv3T4dRo6vCKQKeQkubPN4jnKhcqb51o=; h=To:Subject:References:Date:In-Reply-To:List-Id:List-Unsubscribe: List-Archive:List-Post:List-Help:List-Subscribe:From:Reply-To:Cc: From; b=izp7kXVvgstokxDIyV+PtUMWxG2yfo1K2du1gX+D5COZARi24+hZ64I2p1U9xtZ7a W2OLu1AT3mTIHgKZnGKZN2CV+ypr3CMCLRskn6YA/OTpESfE5qykNP5fQeoHKoBa8X AOuDB5C1mvqIMCXIP7LbEjfzrq8aupRGLr+w/QJY= Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by sourceware.org (Postfix) with ESMTP id 52DCE3858C27 for ; Thu, 26 Aug 2021 10:03:59 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.1 sourceware.org 52DCE3858C27 Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-170-xIQ-oSusMVWn11CxC_o4Og-1; Thu, 26 Aug 2021 06:03:57 -0400 X-MC-Unique: xIQ-oSusMVWn11CxC_o4Og-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 F362F801A92; Thu, 26 Aug 2021 10:03:56 +0000 (UTC) Received: from oldenburg.str.redhat.com (unknown [10.39.194.140]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 2622A60877; Thu, 26 Aug 2021 10:03:55 +0000 (UTC) To: Adhemerval Zanella Subject: Re: [PATCH v2 08/19] nptl: pthread_kill, pthread_cancel should fail after exit (bug 19193) References: <20210823195047.543237-1-adhemerval.zanella@linaro.org> <20210823195047.543237-9-adhemerval.zanella@linaro.org> Date: Thu, 26 Aug 2021 12:03:54 +0200 In-Reply-To: <20210823195047.543237-9-adhemerval.zanella@linaro.org> (Adhemerval Zanella's message of "Mon, 23 Aug 2021 16:50:36 -0300") Message-ID: <8735qw8qut.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; charset=utf-8 Content-Transfer-Encoding: quoted-printable 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: , From: Florian Weimer via Libc-alpha Reply-To: Florian Weimer Cc: libc-alpha@sourceware.org Errors-To: libc-alpha-bounces+e=80x24.org@sourceware.org Sender: "Libc-alpha" * Adhemerval Zanella: > From: Florian Weimer > > This closes one remaining race condition related to bug 12889: if > the thread already exited on the kernel side, returning ESRCH > is not correct because that error is reserved for the thread IDs > (pthread_t values) whose lifetime has ended. In case of a > kernel-side exit and a valid thread ID, no signal needs to be sent > and cancellation does not have an effect, so just return 0. > > sysdeps/pthread/tst-kill4.c triggers undefined behavior and is > removed with this commit. Wrong commit subject: =E2=80=9Cshould [not] fail=E2=80=9D Thanks, Florian