[ECOS] Debug eCos kernel

[Deroo Stijn]

Ok, I enabled CYGPKG_INFRA_DEBUG and can see a lot of extra info, but I'm still not able to see what I need.  I looked further into http://ecos.sourceware.org/docs-latest/user-guide/debugging-techniques.html but don't see how this will enable the CYGIMPL_TRACE_SPLX flag.

I need to know which thread/process is blocking the mutex 'splx_mutex' in synch.c (spl_any()), because at a certain time, the thread 'Network alarm support' is blocking on this mutex.

Enabling CYGIMPL_TRACE_SPLX and calling show_sched_events() should answer this, but I really can't find where to enable this?

Kind regards,
Stijn.

> -----Original Message-----
> From: Andrew Lunn [mailto:andrew@lunn.ch]
> Sent: dinsdag 10 februari 2009 8:38
> To: Deroo Stijn
> Cc: ecos-discuss@sourceware.org
> Subject: Re: [ECOS] Debug eCos kernel
>
> On Tue, Feb 10, 2009 at 08:18:56AM +0100, Deroo Stijn wrote:
>
> > Ok, sorry about that, but I want indeed investigate the mutual
> > exclusion to see where it goes wrong for my application.  So I still
> > don't know how to enable these debugging?
>
> Are you trying to debug problems with the eCos kernel, or the eCos
> networking stack. They are two very different things.
>
> Deadloads and things like that can be very hard to debug since they
> are very timing dependent. Changing the code changes the timing and
> the problem goes away...
>
> Anyway, first thing is to make sure you have asserts enabled:
>
> CYGPKG_INFRA_DEBUG
>
> and asserts will automatically be enabled.
>
> Then take a look at:
>
> http://ecos.sourceware.org/docs-latest/user-guide/debugging-
> techniques.html
>
>         Andrew

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