[news.eclipse.technology.linuxtools] Re: OProfile on openSUSE 11.1

[Kent Sebastian <ksebasti@xxxxxxxxxx>]

> OpModelRoot#refreshModel() is calling Oprofile.getEvents(). The getEvents() 
> call returns an empty array, therefor (I guess) nothing is shown. Some where 
> down, "opxml sessions" is executed. This is returning an empty list too, but 
> (I guess) it shouldn't?
>
> ...
> x86_64> ./opxml sessions
> <?xml version="1.0" encoding="UTF-8"?>
> <sessions>
> </sessions>
> ...
>
> Thanks,
> Uwe Stieber, Wind River 

Hmm odd..  the code for getting the session names simply reads the 
samples directory (/var/lib/oprofile/samples), and loops through the 
struct dirent*s for dir names. To match the events to the samples it 
builds up some info from the sample files on disk and matches event 
names to session names.

I would say that perhaps the files aren't readable but there's a stat 
which should catch it, and otherwise I don't see where it would fail.. 
I'll admit I'm not too familiar with this part of the code, it was 
written by the previous maintainer of the plugin.

If you're willing to debug through opxml.. :) some breakpoints would be:

opxml.cc:412 (jump into get_sessions, also check if opinfo info has 
appropriate data)
opxml.cc:426 (jump into session::get_events() and see what session 
events are inserted, if any)

and related code paths


Thanks,

Kent