From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: Chong Yidong Newsgroups: gmane.emacs.devel Subject: Memory leak in keyboard variables? Date: Wed, 10 Dec 2008 22:03:39 -0500 Message-ID: <87d4fzh0qc.fsf@cyd.mit.edu> NNTP-Posting-Host: lo.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Trace: ger.gmane.org 1228964635 25959 80.91.229.12 (11 Dec 2008 03:03:55 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Thu, 11 Dec 2008 03:03:55 +0000 (UTC) To: emacs-devel@gnu.org Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Thu Dec 11 04:04:55 2008 Return-path: Envelope-to: ged-emacs-devel@m.gmane.org Original-Received: from lists.gnu.org ([199.232.76.165]) by lo.gmane.org with esmtp (Exim 4.50) id 1LAbrC-0001wE-IK for ged-emacs-devel@m.gmane.org; Thu, 11 Dec 2008 04:04:54 +0100 Original-Received: from localhost ([127.0.0.1]:35431 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1LAbq1-0005AR-Bd for ged-emacs-devel@m.gmane.org; Wed, 10 Dec 2008 22:03:41 -0500 Original-Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1LAbpv-00059r-NO for emacs-devel@gnu.org; Wed, 10 Dec 2008 22:03:35 -0500 Original-Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43) id 1LAbpu-00059f-Mv for emacs-devel@gnu.org; Wed, 10 Dec 2008 22:03:35 -0500 Original-Received: from [199.232.76.173] (port=55268 helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1LAbpu-00059c-Im for emacs-devel@gnu.org; Wed, 10 Dec 2008 22:03:34 -0500 Original-Received: from cyd.mit.edu ([18.115.2.24]:35715) by monty-python.gnu.org with esmtp (Exim 4.60) (envelope-from ) id 1LAbpu-0003E3-4e for emacs-devel@gnu.org; Wed, 10 Dec 2008 22:03:34 -0500 Original-Received: by cyd.mit.edu (Postfix, from userid 1000) id 620DC57E1C8; Wed, 10 Dec 2008 22:03:39 -0500 (EST) X-detected-operating-system: by monty-python.gnu.org: Genre and OS details not recognized. X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Original-Sender: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.devel:106787 Archived-At: I've been looking into the memory leak that occurs when terminal frames are killed. From Markus Triska's recipe: emacs -nw -f server-start for i in {1..100}; do emacsclient -t -e "(save-buffers-kill-terminal)"; done I think at least some of this leakage is due to unfreed Lisp objects. For instance, this code in xterm.el leads to ~ 1000 unfreed conses per terminal created and destroyed: (let ((map (copy-keymap xterm-function-map))) ... (set-keymap-parent map (keymap-parent input-decode-map)) (set-keymap-parent input-decode-map map))) Now, input-decode-map is defined in keyboard.c, using DEFVAR_KBOARD. It is a Lisp_Misc_Kboard_Objfwd object, and if I'm not mistaken, such objects are not garbage-collected. When the terminal is killed, are its keyboard's Lisp_Misc_Kboard_Objfwd objects freed? As far as I can tell, they are not freed. But I am no expert in this part of the code, so maybe someone else can clue me in.