[Vm-dev] Simulating the Cog V3 VM

[Laura Perez Cerrato]

Thanks a lot for the quick and helpful responses! I'll keep you updated if
I find any other oddities.
I'm currently trying to add 8-bit depth support to the JPEGReadWriter
plugin in order to be able to write 8-bit deep images to disk. I'm using
the Cog VM since I'm running Cuis (it provides some very helpful image
processing related packages), which is based on a non-Spur Squeak image.
On 11 May 2016 15:54, "Clément Bera" <bera.clement at gmail.com> wrote:

>
> Hi,
>
> The VM developers mostly develop using the Spur memory manager, so it
> could be one of us broke the V3 simulator. Sorry about that. Have you
> reached the point in the simulator where the display screen was shown ?
>
> In general, I run first the StackVM simulator, then the Cog VM simulator,
> then in-image compilation to have a stable system.
>
> Why are you using V3 ? Is it required for what you are trying to do ? Spur
> is generally better unless you need to use V3 for some reason.
>
> For the specific error you have, it seems it's a dispatch problem. All the
> JIT classes are merged into a single C file during Slang translation. For
> simulation, there are methods to automatically dispatch between the
> different objects. I think the method missing shuould look like:
> InLineLiteralsManager >> backEnd
>     <doNotGenerate>
>     ^ cogit backEnd
> Or something like that.
>
> Regards,
>
> On Wed, May 11, 2016 at 7:39 PM, Laura Perez Cerrato <
> lauraperezcerrato at gmail.com> wrote:
>
>>
>> Hello, everyone,
>>
>> I've been trying to simulate the Cog V3 VM using the snippets provided
>> in the VMMaker image with no success. The VM seems to start up fine
>> until it tries to perform a full GC, which raises a debugger with the
>> following message: 'MessageNotUnderstood:
>> InLineLiteralsManager>>backEnd'
>>
>> The image built using the provided scripts shows a lot of messages
>> related with undelcared variables and some of the snippets in the
>> different workspaces include unimplemented messages (e.g.
>> #removeUnneededBuiltins, present in the Slang test workspace, lacks
>> implementors in this image). I suspect something could've gone wrong
>> during the automatic package loading process. However, I seem to have
>> all the necessary changesets installed (telling from a quick
>> inspection of the repository using Monticello).
>>
>> I'm not familiar with the inner workings of the VM and have been
>> working on this only very recently, so my apologies if I seem to be
>> asking something obvious.
>>
>> Thanks in advance,
>>
>> -Laura Perez Cerrato
>>
>
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.squeakfoundation.org/pipermail/vm-dev/attachments/20160511/4ca3fa09/attachment.htm