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Re: is_defined() again [Was: Follow up on profiler development]


From: Daniel Kraft
Subject: Re: is_defined() again [Was: Follow up on profiler development]
Date: Wed, 10 Aug 2011 18:47:42 +0200
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On 08/10/11 17:18, John W. Eaton wrote:
> On 10-Aug-2011, Daniel Kraft wrote:
> 
> | I just observed an "interesting" segfault while working on
> hierarchical | profiling (but it happens as well with the version
> without my work in | progress): | | Running "demo profshow" three
> times in a row makes Octave segfault -- | but GDB shows that the
> segfault happens not inside some profiler data | collection routine
> (which I first thought, since I reworked them for | hierarchical
> profiling) but rather with is_defined().  This routine | becomes more
> and more mystical to me over time! :D | | Any ideas?  But until the
> problem occurs in a more "direct" situation, | I'll defer this to
> later.  (Of course, maybe it is still a problem with | my profiler
> code which corrupts some memory but leads only later to a | segfault
> ... or something.  Maybe I'll try to run Octave through | valgrind to
> find that out -- any experience with that?  Does it work?)
> 
> I can duplicate the problem.
> 
> You can run Octave with valgrind using
> 
> ./run-octave -valgrind

Ah, that's a nice thing to know!  Thanks for the hint! :)

And I take your other message that it is nothing I have to worry about
at the moment for the profiler.  That's good news for me. ;)

Cheers,
Daniel

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