[Vm-dev] Works in SqueakVM but not Cog

Igor Stasenko siguctua at gmail.com
Tue Dec 14 10:17:39 UTC 2010

On 13 December 2010 21:30, Eliot Miranda <eliot.miranda at gmail.com> wrote:
> On Mon, Dec 13, 2010 at 12:01 PM, Andreas Raab <andreas.raab at gmx.de> wrote:
>> On 12/13/2010 11:52 AM, Igor Stasenko wrote:
>>> The problem i that we want to swap special objects array. And there
>>> are two approaches:
>>> 1  - create a full object memory , which is a copy of existing objects
>>> (but not everything, just selected pieces). This means that there will
>>> be two 'nils' and therefore need a working #become: for swapping.
>>> 2  - mark a set of objects for inclusion in 'new' image, and throw
>>> away the rest via stubbing. So, this approach avoids copying, but also
>>> it doesn't allows to hold two object memories in object memory at same
>>> time (host and baby one).
>> There are at least two more options:
>> (3) Write a primitive that replaces the special objects array and includes a set of classes to be updated (this would include all the literals).
> which would give Cog the opportunity to void its code cache, hence  avoiding its limitations w.r.t. nil true false and the character table.
> good approach

Yep. But this requires modifying VM, which guys trying to avoid right now.

@Benjamin, i hope you watching this thread.
It would be good if you leave a comment(s) , because i don't know much
details about it and your current needs.
And only want to help.

Best regards,
Igor Stasenko AKA sig.

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