From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: martin rudalics Newsgroups: gmane.emacs.devel Subject: Re: Opportunistic GC Date: Mon, 8 Mar 2021 09:26:52 +0100 Message-ID: <666da624-2f59-2eb4-8e56-f0ad20dd900c@gmx.at> References: Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="17615"; mail-complaints-to="usenet@ciao.gmane.io" Cc: emacs-devel@gnu.org To: Pip Cet , Stefan Monnier , eliz@gnu.org Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Mon Mar 08 09:28:16 2021 Return-path: Envelope-to: ged-emacs-devel@m.gmane-mx.org Original-Received: from lists.gnu.org ([209.51.188.17]) by ciao.gmane.io with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1lJBFQ-0004XO-N9 for ged-emacs-devel@m.gmane-mx.org; Mon, 08 Mar 2021 09:28:16 +0100 Original-Received: from localhost ([::1]:50176 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lJBFP-0004KI-Pn for ged-emacs-devel@m.gmane-mx.org; Mon, 08 Mar 2021 03:28:15 -0500 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:40584) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lJBEC-0003JI-4a for emacs-devel@gnu.org; Mon, 08 Mar 2021 03:27:00 -0500 Original-Received: from mout.gmx.net ([212.227.15.18]:44297) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lJBEA-0000ao-IV; Mon, 08 Mar 2021 03:26:59 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=gmx.net; s=badeba3b8450; t=1615192013; bh=U49LwGWzARt4QtjHJ/HUr1U6b/WPUBlscgxpj2L/BBo=; h=X-UI-Sender-Class:Subject:To:Cc:References:From:Date:In-Reply-To; b=KRtnbIC5F4HxYE4xujaTnU71sX9AvAlZ3nL9Af5orRmqCFq4MHL/3NhOHx4B2zdJb aykniFub7rcNNkPoP0RHn9fPPsPHKyhJ/KtLo+bRtq7HTegJG8Nk3wMRuBDaVTdioN ka5sBD7ZH5GflT2ZmfHGriDg3hpXZenx0tkK+NTU= X-UI-Sender-Class: 01bb95c1-4bf8-414a-932a-4f6e2808ef9c Original-Received: from [192.168.1.100] ([212.95.5.150]) by mail.gmx.net (mrgmx004 [212.227.17.190]) with ESMTPSA (Nemesis) id 1M4JqV-1lIu6u29rN-000P4b; Mon, 08 Mar 2021 09:26:53 +0100 In-Reply-To: Content-Language: en-US X-Provags-ID: V03:K1:kZHR9wlUkRq1Pata1rSTQxtBu2S5Or6Pp0UtrvvY5n9FuE0bzc0 cllQMtta8dBgKyJNAh1nm6ARC+zNrIor0gLwTM+AL2OU2cM+fms8/9dPi9aq1rSScM30gcs V8SBc3qdWu+n0eOAGYU8R7NeZ/a8B38XIqOu5Nl19oN9QOokL4ALIpkj5n2c9TRu9jJHUjF ZGYAfR5KUeonp2JSkZIgA== X-UI-Out-Filterresults: notjunk:1;V03:K0:X8Za4PJdv3U=:s0Oqn77/+QnjSiE/muo4c8 8KwSF7P8mHp2UFIazbfxLr3mpEVxAxFU5kSywq97dCq00GrEk/tzQLSPfoBMoQspUt28m8N1I 59o24mW+yAAJSwCosZcC2fUHTe53tjle/CsqWhXRIbds6X67zQJIvFay1DERPk8rYcgbqeE3L lldMZkJ5A6wO1lUuud7vFfxuMNfsihlhnZtTj+0o7gVyx69vqWPrs90szUfAxsw+t8escstNO h5+NGIda1ykFZz+3dQ3d+S2ymy1MygMLAg/Jy59hWiE+motyUK/c00ZdHXamy/84OuChDqoj8 7na2DAPsZ1eMyW8B/fm6DGy2ORCU1MVK6qB2YvJuvOsVZ1dDhtMQPfwmwx80qHq3XrFYP2CkO 22G0/A9nnL5dVQDTmk1ASh+zAuWzHxxkXQYnEeBiq2vwcsMYAi2QKvSiXd9UQqTrvw3YBGAFM LGpb07bQmvn3RLE4cpufJ+rBRESxYvm+PUOGlV66+oxl2Nm2+uSqNGd7AT0I7mXor0sRQJ4eh LDw0x40xrU5jXpkQGB6otXQBu1XhdUhVmFd6zw2TL/cT3QcwzEJkgk47Q/EZ1qLJ0cX834/zm SSl+HlSP6qOyHWOpf/QAsvsjI0/xhRL26byz/SXV9EpwjfgCmnQQncaLMrYnUnsWTwgqWuzKc pge7RuxoawnPCE3W1Uz+eqsWAIAxYZaPbi0FXHScU4N6rQ+MXkuxxOTtXAl8xsssdFxTmNy6U ZzY9rzWgBLOY4hPWbTNUzMg19X42bCH1+vrAf8DVcCe5PW6Kv1qgDiVxieQVEbF6IOXLlg7s Received-SPF: pass client-ip=212.227.15.18; envelope-from=rudalics@gmx.at; helo=mout.gmx.net X-Spam_score_int: -25 X-Spam_score: -2.6 X-Spam_bar: -- X-Spam_report: (-2.6 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H2=-0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Original-Sender: "Emacs-devel" Xref: news.gmane.io gmane.emacs.devel:266164 Archived-At: > For me, it was a bit difficult to see that this would indeed be safe, > but I'm now pretty convinced it would be: objects that are unreachable > in the child Emacs cannot become reachable in the parent Emacs (they > might show up on the stack, but that's a false positive). How would this handle the standard problem of the Lisp thread storing a pointer to an unmarked object A in an already marked object B and releasing all other pointers to A? martin