From: storm@cua.dk (Kim F. Storm)
Cc: Luc Teirlinck <teirllm@dms.auburn.edu>, rms@gnu.org, emacs-devel@gnu.org
Subject: Re: Fix to long-standing crashes in GC
Date: 20 May 2004 00:37:31 +0200 [thread overview]
Message-ID: <m3k6z882ms.fsf@kfs-l.imdomain.dk> (raw)
In-Reply-To: <jwv3c5wrrql.fsf-monnier+emacs@gnu.org>
Stefan Monnier <monnier@iro.umontreal.ca> writes:
> > I have now found two different cases where a pointer on the stack
> > points to GC-managed memory (mem_find finds it), to a cons cell with a
> > Lisp_Misc_Free in the car and a bogus list in the cdr. I suspect there
> > are many more such cases.
>
> Right. And it should never happen.
>
> > I included one such list in my previous mail.
>
> Yes, I've seen it. Thank you.
>
> >> So I think w need to look further.
> > Looking for what?
>
> For what causes Lisp_Misc_Free cells to appear in the car of cons cells that
> are apparently live. I'm not sure how best to do that. Maybe we should
> write a GC-sanity-check routine (scan all cons blocks looking for live cells
> with misc free objects in them) that we could call at GC-entry and GC-exit,
> this way we could at least see whether the problem happens during GC or
> between GC.
Yesterday, I did a partial test where I wrote a fun to check all
Lisp_Misc blocks for invalid misc types (except Lisp_Misc_Free) for
every call to Fcons -- and no such problems occurred, i.e. the bad
misc cells pointed to from some cons cells were NOT in the marker
block chain...
I will make another test to check the cons blocks in a similar way.
--
Kim F. Storm <storm@cua.dk> http://www.cua.dk
next prev parent reply other threads:[~2004-05-19 22:37 UTC|newest]
Thread overview: 55+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-05-13 18:19 Fix to long-standing crashes in GC Lars Hansen
2004-05-13 19:09 ` Luc Teirlinck
2004-05-13 19:29 ` Luc Teirlinck
2004-05-13 19:30 ` Lars Hansen
2004-05-13 19:19 ` Stefan Monnier
2004-05-13 22:16 ` Luc Teirlinck
2004-05-13 23:04 ` Stefan Monnier
2004-05-14 11:42 ` Kai Grossjohann
2004-05-14 14:53 ` Luc Teirlinck
2004-05-14 20:48 ` Kai Grossjohann
2004-05-16 9:27 ` Kai Grossjohann
2004-05-14 18:39 ` Luc Teirlinck
2004-05-14 20:54 ` Kim F. Storm
2004-05-14 21:02 ` Richard Stallman
2004-05-22 18:09 ` Lars Hansen
2004-05-23 16:33 ` Eli Zaretskii
2004-05-23 16:32 ` Luc Teirlinck
2004-05-23 17:11 ` Lars Hansen
2004-05-24 5:30 ` Eli Zaretskii
2004-05-25 3:03 ` Luc Teirlinck
2004-05-25 7:07 ` Eli Zaretskii
2004-05-15 4:39 ` Robert Marshall
2004-05-17 14:39 ` Kim F. Storm
2004-05-17 17:42 ` Robert Marshall
2004-05-17 14:43 ` Kim F. Storm
2004-05-18 0:13 ` Luc Teirlinck
2004-05-19 1:26 ` Richard Stallman
2004-05-19 12:11 ` Kim F. Storm
2004-05-19 19:32 ` Stefan Monnier
2004-05-19 22:33 ` Kim F. Storm
2004-05-20 13:17 ` Richard Stallman
2004-05-19 12:52 ` Kim F. Storm
2004-05-19 16:48 ` Stefan Monnier
2004-05-19 22:04 ` Kim F. Storm
2004-05-19 22:25 ` Stefan Monnier
2004-05-19 22:37 ` Kim F. Storm [this message]
2004-05-19 22:50 ` Stefan Monnier
2004-05-20 0:44 ` Kim F. Storm
2004-05-21 23:43 ` Kim F. Storm
2004-05-23 1:14 ` Stefan Monnier
2004-05-23 18:28 ` Richard Stallman
2004-05-24 11:57 ` Kim F. Storm
2004-05-28 21:51 ` Stefan Monnier
2004-05-28 23:40 ` Kim F. Storm
2004-05-28 23:49 ` Stefan Monnier
2004-05-29 23:15 ` Kim F. Storm
2004-05-30 20:44 ` Stefan Monnier
2004-05-31 20:21 ` Kim F. Storm
2004-06-08 20:03 ` Lars Hansen
2004-05-20 7:08 ` Richard Stallman
2004-05-21 22:58 ` Stefan Monnier
-- strict thread matches above, loose matches on Subject: below --
2004-05-13 23:34 Robert Anderson
2004-05-12 13:19 Kim F. Storm
2004-05-13 13:06 ` Kenichi Handa
2004-05-13 15:45 ` Richard Stallman
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
List information: https://www.gnu.org/software/emacs/
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=m3k6z882ms.fsf@kfs-l.imdomain.dk \
--to=storm@cua.dk \
--cc=emacs-devel@gnu.org \
--cc=rms@gnu.org \
--cc=teirllm@dms.auburn.edu \
/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 public inbox
https://git.savannah.gnu.org/cgit/emacs.git
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).