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 377973857BBF for ; Tue, 12 Jul 2022 14:45:26 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.1 sourceware.org 377973857BBF Authentication-Results: sourceware.org; dmarc=pass (p=none dis=none) header.from=redhat.com Authentication-Results: sourceware.org; spf=pass smtp.mailfrom=redhat.com DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1657637125; h=from:from:reply-to:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:mime-version:mime-version: content-type:content-type:in-reply-to:in-reply-to: references:references; bh=p7nUwvJeTZ/nHZf13CvG26ZGGP7l7ESLzwJeX1+zWiA=; b=CiCGzeGF1Cs1gO1yniTJ08ZNGWjmc9UFxymBS7XS6R/S9E+i1c69c/iB32pLVimCsDoOnD /M1J18uVFwOzFJwCxumisXy0EVqm9xXhTxNlDCNWstcVmZlUBrpxdyuxGWtV2vFjrks0vP +3dQeMPm3l9vHV2R/6ZMcuLeXw/xccc= 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-42-TNFptwXGNtirdMGcwsRr1Q-1; Tue, 12 Jul 2022 10:45:24 -0400 X-MC-Unique: TNFptwXGNtirdMGcwsRr1Q-1 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.rdu2.redhat.com [10.11.54.4]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 562BC1C1976A for ; Tue, 12 Jul 2022 14:45:24 +0000 (UTC) Received: from calimero.vinschen.de (unknown [10.39.193.50]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 31EAD2026D07 for ; Tue, 12 Jul 2022 14:45:24 +0000 (UTC) Received: by calimero.vinschen.de (Postfix, from userid 500) id 981E7A80772; Tue, 12 Jul 2022 16:45:22 +0200 (CEST) Date: Tue, 12 Jul 2022 16:45:22 +0200 From: Corinna Vinschen To: newlib@sourceware.org Subject: Re: [PATCH 00/14] Add --enable-newlib-reent-thread-local option Message-ID: Reply-To: newlib@sourceware.org Mail-Followup-To: newlib@sourceware.org References: <20220621124931.36450-1-sebastian.huber@embedded-brains.de> MIME-Version: 1.0 In-Reply-To: X-Scanned-By: MIMEDefang 2.78 on 10.11.54.4 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=vinschen@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=utf-8 Content-Disposition: inline X-Spam-Status: No, score=-5.7 required=5.0 tests=BAYES_00, DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, RCVD_IN_DNSWL_NONE, 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: newlib@sourceware.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Newlib mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 12 Jul 2022 14:45:27 -0000 On Jul 12 13:18, Sebastian Huber wrote: > On 21/06/2022 14:49, Sebastian Huber wrote: > > By default, Newlib uses a huge object of type struct _reent to store > > thread-specific data. This object is returned by __getreent() if the > > __DYNAMIC_REENT__ Newlib configuration option is defined. > > > > The reentrancy structure contains for example errno and the standard input, > > output, and error file streams. This means that if an application only uses > > errno it has a dependency on the file stream support even if it does not use > > it. This is an issue for lower end targets and applications which need to > > qualify the software according to safety standards (for example ECSS-E-ST-40C, > > ECSS-Q-ST-80C, IEC 61508, ISO 26262, DO-178, DO-330, DO-333). > > > > If the new _REENT_THREAD_LOCAL configuration option is enabled, then struct > > _reent is replaced by dedicated thread-local objects for each struct _reent > > member. The thread-local objects are defined in translation units which use > > the corresponding object. > > > > Patches 1 to 13 contain no functional changes (hopefully). They just introduce > > macros to be able to use struct _reent members or thread-local objects > > depending on the new _REENT_THREAD_LOCAL option. Patch 14 adds the new > > configuration option. > > Are there any general objections to integrate this patch set? Only that neither Jeff nor I reviewed the patchset yet. Corinna