Re: [rvm-research] [rvm-core] Regarding Exception thrown in RefCount Implementation.

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On 24/12/13 01:21, Erik Brangs wrote:
> Hi,
> 
> On 19.12.2013 01:45, Hari Krishnan wrote:
>> I cannot figure out why this error pops up.
> 
> Based on your previous mails, I assume that you've already read the
> documentation. I'm not proficient in MMTk so I can't give you any
> specific advice. However, my experience is that it is a good idea
> to read a book about debugging if you never had any formal
> education in debugging.
> 
> You can also take a look at rdb ( http://sape.inf.usi.ch/rdb ), a
> Jikes RVM specific debugger that's being developed by Dmitri
> Makarov and Matthias Hauswirth at the University of Lugano. AFAIK
> you'll need to use Mac OS if you want to attach to a running Jikes
> RVM. If you don't use Mac OS, you can still use rdb to examine the
> bootimage.
> 
>> I am attaching the patch here that reproduced that error. The
>> error that produced is following:
> 
> I can confirm that the patch reproduces the problem on hg tip for
> the BaseBaseRefCount configuration. I'm not sure whether it's a
> MMTk problem or a problem in the interaction of MMTk and Jikes RVM.
> Perhaps the MMTk test harness can be used to determine that?

There isn't an issue under the MMTk Harness - it's going to be a Jikes
RVM problem.

Have you tried making this change against an earlier stable release ?
 Maybe a regression has crept in recently ?

> 
> Kind regards,
> 
> Erik Brangs
> 
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