From: Dmitry Antipov <dmantipov@yandex.ru>
To: martin rudalics <rudalics@gmx.at>
Cc: Stefan Monnier <monnier@iro.umontreal.ca>, emacs-devel@gnu.org
Subject: Re: [Emacs-diffs] /srv/bzr/emacs/trunk r109890: Do not mark objects from deleted buffers, windows and frames.
Date: Thu, 06 Sep 2012 13:57:50 +0400 [thread overview]
Message-ID: <5048739E.80005@yandex.ru> (raw)
In-Reply-To: <504850B4.7020002@gmx.at>
On 09/06/2012 11:28 AM, martin rudalics wrote:
> > Since we can't implement this just now, I'm reverting window marking;
> > but I think that I'll spent more time on this :-).
>
> ... and please tell the people from bug 12251 about it ;-)
OK
> > Hm. For example, killed buffers may sit in all_buffers for a while, and
> > still
> > have from tens to thousands reachable objects per buffer (although I didn't
> > check whether these objects are reachable only from this dead buffer).
>
> Could you elaborate?
Elaborate what? I tried to count calls to mark_object needed to mark the buffer
and all data referenced from it, and it may be from 60-70 to a few thousands or
even more; some of these calls are no-ops since corresponding objects may be
marked already or doesn't need marking at all.
> Marker objects belong to the buffer.
Not all - make_window attaches two new markers to W->start and W->pointm; when W
is set up to display the buffer B (set_window_buffer or maybe somewhere else),
these markers are changed from 'point to nowhere' to 'point into B'.
> The start and pointm fields are
> regenerated from the saved window structure.
Their member values are regenerated assuming that W->start and W->pointm itself
are valid marker objects:
Fset_window_configuration:
...
else if (!NILP (BVAR (XBUFFER (p->buffer), name)))
/* If saved buffer is alive, install it. */
{
wset_buffer (w, p->buffer);
w->start_at_line_beg = !NILP (p->start_at_line_beg);
set_marker_restricted (w->start, p->start, w->buffer); /* here */
set_marker_restricted (w->pointm, p->pointm, /* and here */
w->buffer);
Fset_marker (BVAR (XBUFFER (w->buffer), mark),
p->mark, w->buffer);
This will throw an error if start/pointm aren't markers, or crash
if they're invalid or uninitialized; if we can't trust the values
stored in W's fields, we should use Fcopy_marker instead.
Dmitry
next prev parent reply other threads:[~2012-09-06 9:57 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <E1T9II0-0005q4-Gh@vcs.savannah.gnu.org>
2012-09-05 18:24 ` [Emacs-diffs] /srv/bzr/emacs/trunk r109890: Do not mark objects from deleted buffers, windows and frames Stefan Monnier
2012-09-05 19:15 ` Stefan Monnier
2012-09-06 6:55 ` Dmitry Antipov
2012-09-06 7:00 ` Herring, Davis
2012-09-06 7:28 ` martin rudalics
2012-09-06 9:57 ` Dmitry Antipov [this message]
2012-09-06 14:42 ` martin rudalics
2012-09-06 12:53 ` Stefan Monnier
2012-09-06 14:42 ` martin rudalics
2012-09-06 12:52 ` Stefan Monnier
2012-09-06 14:42 ` martin rudalics
2012-09-06 17:33 ` Stefan Monnier
2012-09-07 9:52 ` martin rudalics
2012-09-06 17:06 ` Dmitry Antipov
2012-09-06 17:37 ` Stefan Monnier
2012-09-07 9:53 ` martin rudalics
2012-09-07 15:19 ` Stefan Monnier
2012-09-10 9:46 ` Reachable killed buffers [Was: Re: [Emacs-diffs] /srv/bzr/emacs/trunk r109890: Do not mark objects from deleted buffers, windows and frames] Dmitry Antipov
2012-09-10 13:25 ` Stefan Monnier
2012-09-10 15:15 ` Reachable killed buffers Dmitry Antipov
2012-09-10 20:15 ` Stefan Monnier
2012-09-10 21:10 ` Stefan Monnier
2012-09-11 5:25 ` Dmitry Antipov
2012-09-11 13:06 ` Stefan Monnier
2012-09-12 8:09 ` martin rudalics
2012-09-12 13:47 ` Paul Eggert
2012-09-12 13:59 ` Dmitry Antipov
2012-09-12 14:05 ` Paul Eggert
2012-09-12 14:15 ` martin rudalics
2012-09-12 15:59 ` Dmitry Antipov
2012-09-12 17:37 ` martin rudalics
2012-09-12 17:55 ` Paul Eggert
2012-09-13 3:29 ` Stefan Monnier
2012-09-13 4:43 ` Paul Eggert
2012-09-13 5:00 ` Dmitry Antipov
2012-09-13 5:18 ` Paul Eggert
2012-09-13 12:47 ` Stefan Monnier
2012-09-13 16:49 ` martin rudalics
2012-09-13 17:11 ` Paul Eggert
2012-09-13 17:30 ` martin rudalics
2012-09-14 12:10 ` Dmitry Antipov
2012-09-14 13:29 ` Stefan Monnier
2012-09-14 13:38 ` martin rudalics
2012-09-13 18:01 ` Dmitry Antipov
2012-09-06 7:20 ` [Emacs-diffs] /srv/bzr/emacs/trunk r109890: Do not mark objects from deleted buffers, windows and frames martin rudalics
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