From: Chetan Pandya <pandyacus@sbcglobal.net>
To: Chong Yidong <cyd@stupidchicken.com>, Kenichi Handa <handa@m17n.org>
Cc: emacs-devel@gnu.org
Subject: Re: Memory leak in keyboard variables?
Date: Mon, 15 Dec 2008 18:14:20 -0800 (PST) [thread overview]
Message-ID: <964372.27721.qm@web83201.mail.mud.yahoo.com> (raw)
Although not related, spotted while looking at the code in font.c: font_update_drivers
for (list = f->font_driver_list; list; list = list->next)
if (! list->on)
- list_table[i] = list;
+ list_table[i++] = list;
list_table[i] = NULL;
Chetan
--- On Mon, 12/15/08, Chong Yidong <cyd@stupidchicken.com> wrote:
> From: Chong Yidong <cyd@stupidchicken.com>
> > The strategy is to record all font-objects in
> font-entities, and
> > record all font-entities in a cache of each
> font-backend. The caches
> > are freed when `delete-frame' calls
> font_update_drivers with
> > new_drivers as nil
>
> Thanks for the explanation. It was very helpful.
>
> I think the problem is that font_clear_cache is incorrectly
> written.
> For some reason, it assumes that the font cache entries
> have the form
>
> (font-spec [entity1 entity2...])
>
> when in fact, they have the form
>
> (font-spec entity1 entity2...)
>
> The following patch to font_clear_cache frees 60-70k of
> memory per
> terminal.
>
> Do you know why font_clear_cache was written this way, and
> whether there
> could be any other places in the font code that make this
> incorrect
> assumption?
>
> *** trunk/src/font.c.~1.99.~ 2008-12-13 10:39:30.000000000
> -0500
> --- trunk/src/font.c 2008-12-14 22:06:26.000000000 -0500
> ***************
> *** 2651,2671 ****
> struct font_driver *driver;
> {
> Lisp_Object tail, elt;
>
> /* CACHE = (DRIVER-TYPE NUM-FRAMES FONT-CACHE-DATA ...)
> */
> for (tail = XCDR (XCDR (cache)); CONSP (tail); tail =
> XCDR (tail))
> {
> elt = XCAR (tail);
> ! if (CONSP (elt) && FONT_SPEC_P (XCAR (elt))
> && VECTORP (XCDR (elt)))
> {
> ! Lisp_Object vec = XCDR (elt);
> ! int i;
> !
> ! for (i = 0; i < ASIZE (vec); i++)
> {
> ! Lisp_Object entity = AREF (vec, i);
>
> ! if (EQ (driver->type, AREF (entity,
> FONT_TYPE_INDEX)))
> {
> Lisp_Object objlist = AREF (entity,
> FONT_OBJLIST_INDEX);
>
> --- 2651,2671 ----
> struct font_driver *driver;
> {
> Lisp_Object tail, elt;
> + Lisp_Object tail2, entity;
>
> /* CACHE = (DRIVER-TYPE NUM-FRAMES FONT-CACHE-DATA ...)
> */
> for (tail = XCDR (XCDR (cache)); CONSP (tail); tail =
> XCDR (tail))
> {
> elt = XCAR (tail);
> ! /* elt should have the form (FONT-SPEC FONT-ENTITY
> ...) */
> ! if (CONSP (elt) && FONT_SPEC_P (XCAR
> (elt)))
> {
> ! for (tail2 = XCDR (elt); CONSP (tail2); tail2 = XCDR
> (tail2))
> {
> ! entity = XCAR (tail2);
>
> ! if (FONT_ENTITY_P (entity)
> ! && EQ (driver->type, AREF (entity,
> FONT_TYPE_INDEX)))
> {
> Lisp_Object objlist = AREF (entity,
> FONT_OBJLIST_INDEX);
next reply other threads:[~2008-12-16 2:14 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-12-16 2:14 Chetan Pandya [this message]
2008-12-16 3:33 ` Memory leak in keyboard variables? Chong Yidong
-- strict thread matches above, loose matches on Subject: below --
2008-12-15 1:26 Kenichi Handa
2008-12-15 3:16 ` Chong Yidong
2008-12-16 4:31 ` Kenichi Handa
2008-12-11 3:03 Chong Yidong
2008-12-11 9:30 ` Andreas Schwab
2008-12-11 15:09 ` Chong Yidong
2008-12-11 20:43 ` Chong Yidong
2008-12-13 14:19 ` Markus Triska
2008-12-13 19:09 ` Chong Yidong
2008-12-16 14:11 ` Chong Yidong
2008-12-17 4:40 ` Stephen J. Turnbull
2008-12-20 1:50 ` Chong Yidong
2008-12-20 15:34 ` Jan Djärv
2008-12-20 17:09 ` Markus Triska
2008-12-20 17:45 ` Dan Nicolaescu
2008-12-20 18:37 ` Dan Nicolaescu
2008-12-20 20:41 ` Chong Yidong
2008-12-11 15:59 ` Stefan Monnier
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