[Vm-beginners] Haiku OS VM

[Eliot Miranda]

Hi Kuszi,

On Fri, May 10, 2019 at 3:07 AM kuszi <kuszinger at giscom.hu> wrote:

> Hello! I'm interested *how difficult it could be to create a viable
> smalltalk VM (squeak)* to be run on Haiku. I've realized that there was a
> version for BeOS once but I checked (also with the maintainer) and it seems
> to be stopped. I wonder what I need to cimpile a current version and bind
> to haiku (BeOS) infrastructure (net - graphics - audio). I used to build
> software on linux for myself with minor changes or configuration only,
> however I'm curious...


To get the StackInterpreter version of opensmalltalk-vm working on any OS
one needs
- a C compiler
- threads, specifically the ability to spawn a high-priority thread that
can block on a short delay, from which is constructed a heartbeat
- platform support for file access, display access etc

I can't imagine that Haiku, if it is a successor or variant of BeOS, would
lack any of these facilities.

To get the high-performance Cog (JIT) version of opensmalltalk-vm working
on any OS one needs the additional facility of
- marking a read/writable part of the address space as also executable

Again I can't imagine BeOS lacking this/


So I can't see any serious road blocks.  I wonder does anyone know where
the BeOS files for Squeak are?  This would be a good starting point.


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-- 
_,,,^..^,,,_
best, Eliot
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