launchpad-dev team mailing list archive

[Maris Fogels <maris.fogels@xxxxxxxxxxxxx>]

On 04/27/2010 09:10 AM, Max Bowsher wrote:
> On 27/04/10 13:44, Gavin Panella wrote:
> > I have a hung test process on my local machine.
> >
> > Command: bin/test -vvct 'check-?watch|bug-?watch|bug-?track'
> > Michael Hudson Trace: http://pastebin.ubuntu.com/423333/
>
> Judging by the presence of spawn_layer_in_subprocess and the general
> appearance of the stacks to be that of waiting on stdio, I'd suggest
> that this process is just waiting for communications from the subprocess?
>
> > GDB Trace: http://pastebin.ubuntu.com/423334/
>
> Only for the main thread - remember to do 'thread apply all backtrace'
> (or 'thr a a bt').
>
> > In gdb, pystack and pystackv never completed (they hung too).
>
> I've never got these to work, either. I'd be interested to know if they
> ever work.
>
>
> Max.

Thank you for the tips.  I've added info about threaded backtraces and macro 
hangs to https://dev.launchpad.net/Debugging/GDB

Are the raw GDB backtraces of any value for this?  Michael's tool produces far 
more readable output.


Maris