[Vm-dev] SystemTracing: SystemTracing-dtl.23.mcz

[Luc Fabresse]

Hi Guys,

 I am certainly doing something wrong while using SystemTracer.
 I tried SystemTracing-StephaneDucasse.25 (on ss in PharoTaskForces) both
in a Pharo 1.3 and 1.4.
 I did:
 SystemTracer2 writeImage: 'test.image'
 tracing and writing work well but the when I launch the resulting
test.image, UI is not responsive. It seems that it is just a UI  problem.

 Any hint?

 Thanks,

#Luc



2011/12/12 stephane ducasse <stephane.ducasse at gmail.com>

>
> excllent I will add that in the class comments.
>
> Stef
>
> On Dec 12, 2011, at 12:43 PM, David T. Lewis wrote:
>
> >
> > On Mon, Dec 12, 2011 at 08:18:41AM +0100, stephane ducasse wrote:
> >>
> >> Thanks I committed it.
> >
> > Thanks, next time I will do it myself :)
> >
> >> Now I have a question
> >>
> >> SystemTracer64 is to run on 64
> >>
> >> How do I say to SystemTracer or SystemTracer2 that I want to convert or
> not to 64 bits?
> >> Because I thought (stupidly) that SystemTracer2 was for 32->32
> >
> > No, you are correct. SystemTracer2 is for 32->32. SystemTracer is
> > the original version, which IMO is useful for education to understand
> > how these things work, but is not useful with current images.
> >
> > SystemTracer64 is for converting an existing (32-bit format) image
> > to the experimental 64-bit object format. It is a subclass of
> > SystemTracer2 with methods for converting headers, oops, and fields
> > from the normal 32-bit format to the 64-bit format.
> >
> > This is sometimes confusing, because people may assume that a
> > 64-bit image is for 64-bit platforms, but actually it is only
> > about the internal data formats. You can run a 32-bit image on
> > a 64-bit platform, so for example there is no reason that you
> > could not run a 64-bit image on a 32-bit Cog VM (this would
> > require some development in the oscog VMMaker but no reason
> > it cannot be done). I say this because people may assume that
> > 32-bit Cog could not be used for 64-bit images, but this is
> > not really true.
> >
> > If you invent a new object format (as I expect that Eliot will
> > do), then you might create a new subclass of SystemTracer2 that
> > would know how to convert to that format.
> >
> > Dave
> >
>
>
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