On Mon, Jan 30, 2012 at 7:05 PM, Eliot Miranda <eliot.miranda@gmail.com> wrote:

Hi Mariano,

On Mon, Jan 30, 2012 at 9:57 AM, Mariano Martinez Peck <marianopeck@gmail.com> wrote:

On Mon, Jan 30, 2012 at 6:47 PM, Stefan Marr <smalltalk@stefan-marr.de> wrote:

Hi:

On 30 Jan 2012, at 18:30, Mariano Martinez Peck wrote:

> If with this piece of data, together with what I mentioned in the first email, you have a hint, please tell me :)

Wild guess: did you invalidate all the caches that a GC usually invalidates? Thinks like primitive caches etc? Not sure what is there in Cog that could be problematic.

Thanks Stefan. I tried to do a Object flush after each graph I swap out, but still, same problem :(
Thanks for the hint anyway.

While it may be difficult for Cog to get this right, since there are two copies of a jitted method, the original and the machine-code version, it would be great if Cog could have it right. So give than you have a reproducible case could you do me a huge favour and create an image that reproduces the bug? Please create the image as a doit that saves the image and then continues to runt to the crash. e.g. if the code that provokes the crash is "MyTest crash" evaluate this in a workspace, and then verify when you start-up the resulting snapshot that the image crashes:

SmalltalkImage current snapshot: true andQuit: true.

MyTest crash

Hi Eliot. While trying to make the image for you, I found that if the test is run from the image start, as suggested above, the crash doesn't happen. If I do the same but from a "DoIt" in a workspace, then it happens. So I think that maybe I am becoming some contexts/compiledMethods from the executor (the DoIt) of the test...kind of shooting my own feets. But it is difficult for me to know whether a context or a method or whatever comes from the executor of the test or not....

If you think that even if you have to do a do-it from a workspace it helps, then I am happy to upload an image. Otherwise I will continue investigate what is wrong...

THanks!

or

SmalltalkImage current
garbageCollect;

snapshot: true andQuit: true.
MyTest crash

etc

Best regards
Stefan

--
Stefan Marr
Software Languages Lab
Vrije Universiteit Brussel
Pleinlaan 2 / B-1050 Brussels / Belgium
http://soft.vub.ac.be/~smarr
Phone: +32 2 629 2974
Fax: +32 2 629 3525

--
Mariano
http://marianopeck.wordpress.com

--
best,
Eliot