Re: [kde-freebsd] unkillable multithreaded processes stuck in `STOP' state

From: Sam Leffler <sam_at_errno.com>
Date: Thu, 21 Oct 2004 18:47:43 -0700
Robert Watson wrote:
> On Thu, 21 Oct 2004, Michael Nottebrock wrote:
> 
> 
>>On Thursday, 21. October 2004 21:23, Mikhail Teterin wrote:
>>
>>>Hello!
>>>
>>>This happened twice already -- first with KMail and now with Kontact.
>>>A process crashes as usual (KDE's 3.3.0 release was of unusually low
>>>quality), and seems to go away, except it does not. It stays in the
>>>`STOP' (according to top(1)) or in the `T' (as per ps(1)) state and
>>>can not be killed -- neither with -CONT, nor with -KILL.
>>
>>[...]
>>
>>
>>>This is all, probably, due to something in KDE's attempts to capture
>>>crashes and collect backtraces for better bug reports. But whatever bugs
>>>they may have there, having an unkillable process -- of any kind -- worries
>>>me greatly. Is this a known issue, or is a PR warranted?
>>
>>There have been no similar reports (to my knowledge) and I haven't seen
>>anything similar on either 4.x or 5.x (I don't run 6-CURRENT). 
> 
> 
> Actually, I recall seeing a similar problem about 14 months ago on
> 5-CURRENT.  I believe that when a program crashed, its SIGSEGV handler
> would fork and attach gdb to its parent in order to generate a stack
> trace.  I didn't have the opportunity to try and track it down, but I also
> don't remember seeing it in the last six months.  It could be because KDE
> programs crash less for me as opposed to that the bug leading to the wedge
> has been fixed.

On my recent -current laptop (updated last week) I can reliably run gdb 
on a program, break main, and quit.  The process being debugged is left 
in STOP state and is unkillable.

	Sam
Received on Thu Oct 21 2004 - 23:47:29 UTC

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