Debian Bug report logs - #46859
hurd_thread_cancel trips assertion

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Message #5 received at submit@bugs.debian.org (full text, mbox, reply):

From: Mark Kettenis <kettenis@wins.uva.nl>

To: submit@bugs.debian.org

Subject: hurd_thread_cancel trips assertion

Date: Thu, 7 Oct 1999 17:46:53 +0200 (CEST)

Package: libc0.2
Version: N/A
Severity: critical

Note: I'm sending this report such that this bug will enter the Debian
BTS.  The bug has been discussed before on bug-hurd and Roland will
(eventually) look into it.  I don't think any immedeate action needs
to be taken by any other party.  A summary of the discussion on
bug-hurd follows.


I caught the term server on /dev/console failing the following
assertion in hurd_thread_cancel() (hurd/thread-cancel.c:46):

  assert (! __spin_lock_locked (&ss->critical_section_lock));

Since there is no guarantee that the target thread is not in a
critical section, there is obviously something wrong here.

Thomas suggested that there is no need to take the critical section
lock.  I believe that taking the critical section lock is necessary to
prevent the target thread from entering a signal handler.  Roland will
look into the problem.


Mark

Message #14 received at 46859-submitter@bugs.debian.org (full text, mbox, reply):

From: Jeff Bailey <jbailey@nisa.net>

To: 46859-submitter@bugs.debian.org

Subject: Hurd bug

Date: Mon, 21 Oct 2002 19:11:56 -0700

Mark, (Heya, long time)

I'm just cleaning out the glibc BTS.  I pinged Roland about this bug
earlier today, and he indicated that he had no intention of touching
this code until he did a massive overhaul on it.

At a minimum, I'd like to downgrade this bug to 'normal'.  Ideally,
I'd like to close it, since it 1) Will never be fixed in a way that's
meaningful to this bug and 2) it's not in a place that Roland ever
looks anyway.

It might be best to submit this in upstreams gnats database to meet
your original need.

Lemme know.


-- 
learning from failures is nice in theory...
but in practice, it sucks :)
 - Wolfgang Jaehrling

Message #27 received at 46859-done@bugs.debian.org (full text, mbox, reply):

From: Samuel Thibault <sthibault@debian.org>

To: 46859-done@bugs.debian.org

Subject: Re: hurd_thread_cancel trips assertion

Date: Wed, 27 Aug 2014 21:27:09 +0200

Version: 2.9-27

This was fixed a long time ago, by
patches/hurd-i386/tg-thread-cancel.diff.

Samuel

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