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From Tim Ellison <t.p.elli...@gmail.com>
Subject Re: [classlib] moving to 1.5 for real - discuss
Date Thu, 08 Jun 2006 12:11:31 GMT
Geir Magnusson Jr wrote:
> I'm +1 except I'd like to see us get to the point where we can
> 
> - produce a full snapshot of classlib + VM (using DRLVM or JCHEVM or
> whatever)

Absolutely, so how close are we to doing that?

> - understand the timing of getting said VMs far enough that code will
> continue to run

I hope it will not be too much work for said VMs to grok the new class
file format, without doing all the TI, instrument, reflection, ... stuff.

Can people in the know tell me if said VMs can grok LDC CONSTANT_class,
Synthetic access specifiers, etc?  If so we can run what we have got
built with the 1.5 compiler target.

> While I'm stunningly grateful for the support IBM is providing with J9,
> and am looking forward to continuing support being very valuable and
> useful for us, we need to get the point of basic self-reliance wrt VM,
> and I'd at least like to understand what the 1.5 implications are, and
> the timelines for doing it.

Understood -- and me too.  Time line is important since doing things
like concurrent and annotation will depend upon further VM support.

Regards,
Tim

> Tim Ellison wrote:
>> Thanks to many stellar contributions all round we are pretty much
>> exhausting the work we can do with the temporary solution we adopted of
>> source=1.5 target=jsr14|1.4 compiler flags.
>>
>> How do you feel about moving to 1.5 for real?  It would be simple to
>> change the Java compiler build options to generate 1.5 class files.
>>
>> AIUI there is at least some 1.5 awareness in DRLVM and JCHEVM (and
>> SableVM?) which would allow the current functionality to work, and IBM
>> can provide a 1.5 version of the IBM VME to run on.
>>
>> Thoughts?
>>
>> Tim
>>
> 
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> 

-- 

Tim Ellison (t.p.ellison@gmail.com)
IBM Java technology centre, UK.

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