From nobody Mon Feb 27 20:40:05 2023 X-Original-To: dev-commits-src-all@mlmmj.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mlmmj.nyi.freebsd.org (Postfix) with ESMTP id 4PQXSL4LBBz3t6fv; Mon, 27 Feb 2023 20:40:18 +0000 (UTC) (envelope-from carpeddiem@gmail.com) Received: from mail-lj1-f171.google.com (mail-lj1-f171.google.com [209.85.208.171]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (2048 bits) client-digest SHA256) (Client CN "smtp.gmail.com", Issuer "GTS CA 1D4" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4PQXSK6YKMz4MFB; Mon, 27 Feb 2023 20:40:17 +0000 (UTC) (envelope-from carpeddiem@gmail.com) Authentication-Results: mx1.freebsd.org; dkim=none; spf=pass (mx1.freebsd.org: domain of carpeddiem@gmail.com designates 209.85.208.171 as permitted sender) smtp.mailfrom=carpeddiem@gmail.com; dmarc=none Received: by mail-lj1-f171.google.com with SMTP id h3so7815828lja.12; Mon, 27 Feb 2023 12:40:17 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=to:subject:message-id:date:from:in-reply-to:references:mime-version :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=qN2o8VnvRaDsszbEVwOGxG2c+mkXp9EPRg7ucNpRdus=; b=LnakfB/WvtIUjuGHEh/cw7oB5ZktrbJ4E1LXIPdnHhlG+7by+nQCHAK/FtAHdfs3JH IT+oIP+flxtAJdfz0QMNpU3yymIHR4u6b0Rs4bdRl3Dgdjq+xr/ZoVh3uLGSBXFdtx6u Yv6pwlIZHrmQb+SadvKOPSmnBv/RQKChbkAM7Typmo+94SesoR8mMUxsqAiQ6x6Qvv0t 89A58HS7YcKuWU89dvVUeKTwMyPdXI1v6MBazFmKymCI59k9y5VUEkFh9R34dRnhWqi4 /wPo6+Ht3YkUpb4NyV1Krn5minUx6JxtiiZ2CMCIdYpD1jtugORb4vLEgF20SDi2S1t8 gAeg== X-Gm-Message-State: AO0yUKW4XNjgfD0VDA66MpLy5pAVJrSy+RpkuFtW8yQOR5KoyOJwf743 rleuOw4iReK62hmoykNPQStO5YO9wuwumAVqqwjT4nLK X-Google-Smtp-Source: AK7set/ubcBH/QX5ezczc32aMO5gmrx6wShKl+1aVIc0wjFdSbqvf7QoN/GKArwWWhSBq9CWRX8xEDLqqXa+wZHT1+o= X-Received: by 2002:a2e:bc16:0:b0:295:acea:5875 with SMTP id b22-20020a2ebc16000000b00295acea5875mr402964ljf.2.1677530415323; Mon, 27 Feb 2023 12:40:15 -0800 (PST) List-Id: Commit messages for all branches of the src repository List-Archive: https://lists.freebsd.org/archives/dev-commits-src-all List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-dev-commits-src-all@freebsd.org X-BeenThere: dev-commits-src-all@freebsd.org MIME-Version: 1.0 References: <202302241821.31OIL4ux075893@gitrepo.freebsd.org> <20230224205001.Fbn1A%steffen@sdaoden.eu> <20230225012736.PT3cH%steffen@sdaoden.eu> <20230225222952.t3oH3%steffen@sdaoden.eu> In-Reply-To: <20230225222952.t3oH3%steffen@sdaoden.eu> From: Ed Maste Date: Mon, 27 Feb 2023 15:40:05 -0500 Message-ID: Subject: Re: git: 2c709ee70ade - main - libc: handle zero alignment in memalign() To: Ed Maste , src-committers@freebsd.org, dev-commits-src-all@freebsd.org, dev-commits-src-main@freebsd.org Content-Type: text/plain; charset="UTF-8" X-Spamd-Result: default: False [-2.98 / 15.00]; NEURAL_HAM_LONG(-1.00)[-1.000]; NEURAL_HAM_MEDIUM(-1.00)[-1.000]; NEURAL_HAM_SHORT(-0.98)[-0.979]; FORGED_SENDER(0.30)[emaste@freebsd.org,carpeddiem@gmail.com]; R_SPF_ALLOW(-0.20)[+ip4:209.85.128.0/17:c]; MIME_GOOD(-0.10)[text/plain]; RCVD_IN_DNSWL_NONE(0.00)[209.85.208.171:from]; MLMMJ_DEST(0.00)[dev-commits-src-all@freebsd.org,dev-commits-src-main@freebsd.org]; RWL_MAILSPIKE_POSSIBLE(0.00)[209.85.208.171:from]; FREEMAIL_ENVFROM(0.00)[gmail.com]; R_DKIM_NA(0.00)[]; ASN(0.00)[asn:15169, ipnet:209.85.128.0/17, country:US]; RCVD_TLS_LAST(0.00)[]; ARC_NA(0.00)[]; TO_DN_SOME(0.00)[]; FROM_HAS_DN(0.00)[]; FREEFALL_USER(0.00)[carpeddiem]; FROM_NEQ_ENVFROM(0.00)[emaste@freebsd.org,carpeddiem@gmail.com]; RCPT_COUNT_THREE(0.00)[4]; MIME_TRACE(0.00)[0:+]; TO_MATCH_ENVRCPT_ALL(0.00)[]; DMARC_NA(0.00)[freebsd.org]; RCVD_COUNT_TWO(0.00)[2] X-Rspamd-Queue-Id: 4PQXSK6YKMz4MFB X-Spamd-Bar: -- X-ThisMailContainsUnwantedMimeParts: N On Sat, 25 Feb 2023 at 17:29, Steffen Nurpmeso wrote: > > Ed Maste wrote in > : > |On Fri, 24 Feb 2023 at 20:27, Steffen Nurpmeso wrote: > |> Me too. 'Was just thinking of allocators which give back valid > |> but inaccessible memory for 0 bytes so that each access would > |> fault. > | > |The size is not (necessarily) zero though. The alignment requested is. > > I personally would fail EINVAL for 0: something really must be > bogus if you reqest an alignment of 0. The standard says > > Upon successful completion, posix_memalign( ) shall return zero; This is not posix_memalign, this is memalign which is provided for glibc compatibility (and which accepts align == 0). This came up only because Valgrind's tests triggered this case.