Re: [uml-devel] debug uml

[Blaisorblade <blaisorblade@yahoo.it>]

On Thursday 18 May 2006 17:50, Nikola Knezevic wrote:
> Hi all,
> any solutions how to debug uml while it is booting?
> I can trace 

You mean single-step?

> it to process.c:start_userspace and a call to clone. After 
> that, I can't do anything,

Ah, you can't trace the cloned process... or maybe the main one!

> until I send HUP from another console, 
> which is a bit slow.

How that HUP works? I.e. you kill -HUP the main thread and you re-get control 
inside GDB?

> Any suggestions?
Put a pause() call where you want to stop and recompile. Jeff Dike usually 
does so to workaround gdb problems (breakpoints not working)

I'm re-reading your email now and I'm dubious - I often see that breakpoints 
work up to a certain point.

I.e. I set a breakpoint, start UML, it works up to a certain point, afterwards 
it doesn't any more, until I restop it (I use SIGINT but I now understand 
it's the same thing).

I guess GDB doesn't handle well some UML's calls.
-- 
Inform me of my mistakes, so I can keep imitating Homer Simpson's "Doh!".
Paolo Giarrusso, aka Blaisorblade (Skype ID "PaoloGiarrusso", ICQ 215621894)
http://www.user-mode-linux.org/~blaisorblade


	
	
		
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