From: Russ Cox <rsc@swtch.com>
To: Fans of the OS Plan 9 from Bell Labs <9fans@9fans.net>
Subject: Re: [9fans] validateaddress
Date: Wed, 12 Aug 2009 07:59:31 -0700 [thread overview]
Message-ID: <dd6fe68a0908120759x71e8dfcet668e2d084f6f4a58@mail.gmail.com> (raw)
In-Reply-To: <1B2326AB-19A1-4C73-9BA6-0033FA0191F8@ar.aichi-u.ac.jp>
so strcmp is being called a lot but klook isn't.
that means that klook is looping inside, which
basically means the p->next pointer is pointing
at itself.
final script:
kw
mem(kw, "30X") // dumps hash table
*(kw+25*4)
mem(*(kw+25*4), "16X") // dumps entry for 'in'
*(**(kw+25*4)\s) // should print 'in'
i expect that the value printed for *(kw+25*4)
in the third line will also be the third value printed
by the mem on the fourth line, meaning that
the hash table entry in question has a next
pointer pointing at itself. assuming that is true,
i think we're close to the end of what can be done.
the hash table list isn't supposed to loop back
on itself but it is. that means some kind of dangling
pointer or other memory corruption error, which
we're not likely to find retroactively.
russ
next prev parent reply other threads:[~2009-08-12 14:59 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-08-10 6:11 Kenji Arisawa
2009-08-10 17:13 ` erik quanstrom
2009-08-11 3:57 ` Kenji Arisawa
2009-08-11 4:07 ` erik quanstrom
2009-08-11 5:26 ` Kenji Arisawa
2009-08-11 15:27 ` Russ Cox
2009-08-12 6:48 ` Kenji Arisawa
2009-08-12 14:59 ` Russ Cox [this message]
2009-08-13 1:39 ` Kenji Arisawa
2009-08-13 2:15 ` Russ Cox
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=dd6fe68a0908120759x71e8dfcet668e2d084f6f4a58@mail.gmail.com \
--to=rsc@swtch.com \
--cc=9fans@9fans.net \
/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.
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 NNTP newsgroup(s).