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Memory leaks in font objects

From: Dmitry Antipov
Subject: Memory leaks in font objects
Date: Thu, 24 Oct 2013 10:31:55 +0400
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.0.1

On my system, (length (x-list-fonts "*")) is 3007, and this function:

(defun bloat-font ()
  (let ((fonts (x-list-fonts "*")))
    (while fonts
      (condition-case nil (set-frame-font (car fonts)) (error nil))
      (setq fonts (cdr fonts))

causes Emacs (default GTK3 build) to grow up to ~360M RSS, mostly
because a lot of font resources aren't freed when font objects are
reclaimed.  Proper reclamation reduces RSS to ~150M.  This is the
most giant memory leak I've ever seen.  I'm trying to fix this by
adding simple finalization support for Lisp_Vectors; comments are


Attachment: font_finalize.patch
Description: Text Data

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