Re: [omr-dev] Is the project still alive?

["Mark Stoodley" <mstoodle@xxxxxxxxxx>]

Hi Raffaello,

Documentation is certainly one of this project's current
weak spots :( .

We have mostly high level "fluffy" docs
at our web site
(https://www.eclipse.org/omr)
and a very small amount of low level
documentation on a few specific areas in the repo
(see
https://github.com/eclipse/omr/tree/master/doc).
In some areas (e.g.
JitBuilder APIs) we have been trying to incrementally
improve
documentation alongside the code itself, and there
are parts of the
code base that have been historically well documented
(see code in
e.g. gc and port directories), even if we don't always
have the high
level picture documented.

We also have a number of blog articles on different
topics you can
find at our DeveloperWorks Open site:
https://developer.ibm.com/code/open-source-ibm/eclipse-omr/

None of this is what you're looking for, sadly, and
its lack is something
we've regretted for a long time (without, somehow,
doing much about
it :( ).

In lieu of more comprehensive documentation, we do
have a number of
open source language ports that show how some of the
integration
should work. Here are a list of some other open source
projects
currently leveraging Eclipse OMR components, not all
of which you
may have heard about:

1) The simplest one is an integer calculator language
called Base9,
written in a day with a JitBuilder based JIT written
on the second
day. We have a short workshop designed around this
project, which
has received positive feedback (you can find in the
repo too):
        https://github.com/youngar/Base9

We have some thoughts for how the GC and other components
should be
introduced as part of this Base9 project, but we haven't
yet got that
out there, I'm afraid.

2) The Ruby+OMR Tech Preview is something we've talked
quite a bit about.
The current work on this language port resides here:
        https://github.com/rubyomr-preview/ruby

3) Lua Vermelha is a JIT written for Lua 5.3, also
based on the JitBuilder
library. You can find it here:
        https://github.com/Leonardo2718/lua-vermelha

4) The Rosie Pattern Language, at its core, uses a
small pattern matching
engine called "lpeg" which I wrote a small
JitBuilder based JIT for.
Probably the most interesting part for people interested
in Eclipse
OMR is in this repo:
        https://github.com/mstoodle/rosie-lpeg

If you have questions about these, it's probably best
that you reach out
at each of the projects, but those people are also
listening on this
mailing list.


There are at least three other language ports that
I know of that
aren't (yet, I hope) available as open source right
now, and I know of
several academic projects that have started up using
the Eclipse OMR
project.

5) Finally, IBM announced at Java One last year that
it would open source
the J9 Java Virtual Machine, which is built from (and
pulls commits every
hour) from Eclipse OMR. Although there are no promises
in these things,
and I want to be clear that I am *not* speaking for
IBM (despite my
email address), I think it's likely you'll be able
to see that J9 code
before the end of the year.


I know that's not exactly what you were asked for,
but hopefully it gives
you some places to poke around if you're interested
to learn more. 

And please do not hesitate to ask more questions if
there's something
specific you would like to understand better.

--mark




From:      
 raffaello.giulietti@xxxxxxxx
To:      
 omr-dev@xxxxxxxxxxx
Date:      
 2017/05/05 01:19 PM
Subject:    
   Re: [omr-dev]
Is the project still alive?
Sent by:    
   omr-dev-bounces@xxxxxxxxxxx

---

Hi Dorra, hi Mark,

thanks for the quick replies.

Rather than asking for specific questions, I'm more eager to see a
higher level documentation on how the various OMR components interact
and how to exploit them correctly. In addition, it would be immensely
helpful and informative to have a concrete example of a simple language
using them all (or almost all). In this sense, the "competing"
Graal/Truffle team did a good job of popularizing their technologies.

I know that Charlie Gracie did some initial work on SOM++ (Smalltalk),
which is a language simple enough to play the role of a case study, but
I don't know if he evolved it to make it more performing [1].

Greetings
Raffaello

----

[1] http://dev.eclipse.org/mhonarc/lists/omr-dev/msg00102.html




On 05/05/17 18:21, Mark Stoodley wrote:
> Hi Raffaello,
> 
> If you have a question, we're all listening and willing to help :)
. As
> Dorra said,
> though, most of the project activity has been driven via issues and
PRs.
> 
> Thanks for asking rather than assuming :) .
> 
> --mark
> 
> 
> 
> From:        raffaello.giulietti@xxxxxxxx
> To:        omr-dev@xxxxxxxxxxx
> Date:        2017/05/05 11:27 AM
> Subject:        [omr-dev] Is the project still
alive?
> Sent by:        omr-dev-bounces@xxxxxxxxxxx
> ------------------------------------------------------------------------
> 
> 
> 
> Hello,
> 
> may I ask if the OMR is still alive & kicking?
> 
> Judging from the volume on this mailing list, it seems unfortunately
> quite silent.
> 
> Greetings
> Raffaello
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