From: Dmitry Antipov <dmantipov@yandex.ru>
To: Eli Zaretskii <eliz@gnu.org>
Cc: fabrice.popineau@gmail.com,
Stefan Monnier <monnier@iro.umontreal.ca>,
emacs-devel@gnu.org
Subject: Re: GC and stack marking
Date: Wed, 21 May 2014 20:06:55 +0400 [thread overview]
Message-ID: <537CCF1F.4040807@yandex.ru> (raw)
In-Reply-To: <537CCCF6.6020509@yandex.ru>
On 05/21/2014 07:57 PM, Dmitry Antipov wrote:
> 1) Yes, but you need ABI- and machine-specific tricks to find the stack frame boundaries. I.e.
> while in mark_stack, there is no easy way to find start and end of Fgarbage_collect's stack frame.
>
> 2) But see GCC's __builtin_frame_address, https://gcc.gnu.org/onlinedocs/gcc/Return-Address.html.
>
> 3) But even if 2) works on all platforms we have to support, I don't see a reasons to complicate
> GC just to avoid scanning a few tens of bytes of an extra stack frame.
4) mark_stack calls __builtin_unwind_init to save registers onto the stack. So if you stop
at Fgarbage_collect's stack frame, you don't scan the frame of mark_stack too and may
loose Lisp_Objects accessible from registers.
Dmitry
next prev parent reply other threads:[~2014-05-21 16:06 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-05-19 16:31 GC and stack marking Eli Zaretskii
2014-05-19 18:47 ` Paul Eggert
2014-05-19 19:14 ` Eli Zaretskii
2014-05-19 19:58 ` Paul Eggert
2014-05-19 20:03 ` Eli Zaretskii
2014-05-19 20:17 ` Paul Eggert
2014-05-20 16:37 ` Eli Zaretskii
2014-05-20 13:44 ` Stefan Monnier
2014-05-20 16:57 ` Eli Zaretskii
2014-05-20 17:54 ` Stefan Monnier
2014-05-20 19:28 ` Eli Zaretskii
2014-05-20 22:01 ` Stefan Monnier
2014-05-21 2:48 ` Eli Zaretskii
2014-05-21 3:01 ` Stefan Monnier
2014-05-21 15:39 ` Eli Zaretskii
2014-05-21 15:57 ` Dmitry Antipov
2014-05-21 16:06 ` Dmitry Antipov [this message]
2014-05-21 16:55 ` Eli Zaretskii
2014-05-21 16:53 ` Eli Zaretskii
2014-05-21 17:40 ` Stefan Monnier
2014-05-21 17:58 ` Eli Zaretskii
2014-05-22 15:20 ` Eli Zaretskii
2014-05-22 16:14 ` Stefan Monnier
2014-05-24 12:03 ` Eli Zaretskii
2014-05-20 19:12 ` Daniel Colascione
2014-05-20 19:43 ` Eli Zaretskii
2014-05-20 22:03 ` Stefan Monnier
2014-05-21 2:51 ` Eli Zaretskii
2014-05-31 6:31 ` Florian Weimer
2014-05-31 14:24 ` Stefan Monnier
-- strict thread matches above, loose matches on Subject: below --
2014-05-21 19:31 Barry OReilly
2014-05-21 20:13 ` Eli Zaretskii
2014-05-21 20:49 ` Barry OReilly
2014-05-22 2:43 ` Eli Zaretskii
2014-05-22 3:12 ` Daniel Colascione
2014-05-22 5:37 ` David Kastrup
2014-05-22 13:57 ` Stefan Monnier
2014-05-22 15:49 ` Eli Zaretskii
2014-05-22 14:59 ` Barry OReilly
2014-05-22 17:03 ` Eli Zaretskii
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=537CCF1F.4040807@yandex.ru \
--to=dmantipov@yandex.ru \
--cc=eliz@gnu.org \
--cc=emacs-devel@gnu.org \
--cc=fabrice.popineau@gmail.com \
--cc=monnier@iro.umontreal.ca \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
Code repositories for project(s) associated with this external index
https://git.savannah.gnu.org/cgit/emacs.git
https://git.savannah.gnu.org/cgit/emacs/org-mode.git
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.