[squeak-dev] Where can I find details on the Squeak image format?

Hi,

where can I find detailed Information on the Squeak image format?

As well as information on the difference between Squeak 2.2 and Squeak 3.9 (3.10) image formats.

thanks in advance
robert

On 25.04.2008, at 10:57, Robert Wierschke wrote:

> Hi,
>
> where can I find detailed Information on the Squeak image format?

See Interpreter>>writeImageFile:

Or do you mean the object memory layout?

> As well as information on the difference between Squeak 2.2 and  
> Squeak 3.9 (3.10) image formats.


I believe there are none. Or very insignificant ones if at all.

- Bert -

Hi Robert,

on Fri, 25 Apr 2008 10:57:24 +0200, Robert Wierschke you wrote:

> Hi,
>
> where can I find detailed Information on the Squeak image format?

Traditionally a new .image (+/- format changes) is born as the result of  
running SystemTracer, a recent one is mentioned in

-  
http://lists.squeakfoundation.org/pipermail/squeak-dev/2007-November/122816.html

which also points to a corresponding wiki page.

/Klaus

> As well as information on the difference between Squeak 2.2 and Squeak  
> 3.9 (3.10) image formats.
>
> thanks in advance
> robert

Sorry but is "Interpreter" the correct name? I can't find such a class in my Squeak 3.9, Squeak 3.9 dev or my old Squeak 2.2 image.

On 25.04.2008, at 12:07, Robert Wierschke wrote:

> Sorry but is "Interpreter" the correct name? I can't find such a  
> class in my Squeak 3.9, Squeak 3.9 dev or my old Squeak 2.2 image.
>
> 2008/4/25 Bert Freudenberg <[hidden email]>:
>
> See Interpreter>>writeImageFile:


It's in the VMMaker package now. 2.2 should have it though, unless it  
was stripped out.

- Bert -

El 4/25/08 7:15 AM, "Bert Freudenberg" <[hidden email]> escribió:

I add VMMaker (of 3.8) in the FunSqueak.6 (3.10 based) image, but no
extensive test, only the packages load and seems to work.
So here you could have some for play and send feedback.

Anyway , IMHO driving other image only could work if the target image is
very small.

Maybe Pavel kernel is a good candidate...
Or the Dan mini 2.2

Edgar

Certainly here:
http://www.rowledge.org/tim/squeak/OE-Tour.html


On Apr 25, 2008, at 11:12 AM, Bert Freudenberg wrote:

        Mth

Can you tell us (if not secret what you want to do).
Because once you read the image you should run it ;)

Stef


On Apr 25, 2008, at 12:07 PM, Robert Wierschke wrote:

I don't find the VMMaker package in the Squeak3.9 final or Squak3.9 dev image. Is there a way to load these packages into the image?

2008/4/25 Robert Wierschke <[hidden email]>:
> I don't find the VMMaker package in the Squeak3.9 final or Squak3.9 dev
> image. Is there a way to load these packages into the image?
>
Yes, these packages can be found at http://www.squeaksource.com/VMMaker



--
Best regards,
Igor Stasenko AKA sig.

On 25.04.2008, at 17:05, Igor Stasenko wrote:

> 2008/4/25 Robert Wierschke <[hidden email]>:
>> I don't find the VMMaker package in the Squeak3.9 final or Squak3.9  
>> dev
>> image. Is there a way to load these packages into the image?
>>
> Yes, these packages can be found at http://www.squeaksource.com/ 
> VMMaker


Well, the versions there are severely outdated, but for the image  
format question that is no problem indeed.

- Bert -

On 25-Apr-08, at 7:58 AM, Robert Wierschke wrote:

> I don't find the VMMaker package in the Squeak3.9 final or Squak3.9  
> dev image. Is there a way to load these packages into the image?

I hope I don't sound rude here, but if you're so new to using Squeak  
that you haven't yet had to learn about loading packages etc. you may  
have quite a bit of trouble understanding enough of the system to  
start hacking image formats.

There is already an image reader and writer, as well as the  
SystemTracer for writing a differently formatted image. Once you have  
the VMMaker package you will find it includes all you need (well, I  
won't promise there aren't bugs) to read an image into a simulation of  
the VM, run it and write it. IIRC Craig has probably been the most  
recent user of simulation so hopefully he can chime in with more info.  
When you have an image loaded into the simulator it is possible to  
find out all sorts of things about it, though more tools might be  
interesting.

I vaguely remember reading of some code to remotely access image files  
being mentioned some time ago; perhaps Yoshiki or Takashi can help?

It would be very helpful if you could explain what you want to do with  
the image.


tim
--
tim Rowledge; [hidden email]; http://www.rowledge.org/tim
How was Thomas J. Watson buried?  9 edge down.

> > I don't find the VMMaker package in the Squeak3.9 final or Squak3.9  
> > dev image. Is there a way to load these packages into the image?
>
> I hope I don't sound rude here, but if you're so new to using Squeak  
> that you haven't yet had to learn about loading packages etc. you may  
> have quite a bit of trouble understanding enough of the system to  
> start hacking image formats.

  Back in 2.3 era, I didn't know anything about Smalltalk/Squeak
internal (and I thought that it was a dead language) but managed to
port Squeak VM to a platform.  If there modules and packages,
etc. existed, I wouldn't be able to pull that off^^;

  That is my ImageBrowser thing.  That does use some knowledge
in CompiledMethod, MethodDictonary, etc.

> It would be very helpful if you could explain what you want to do with  
> the image.

  Me, too.

-- Yoshiki