RE: [aspectj-dev] JDK 1.6

["Eric Bodden" <eric.bodden@xxxxxxxxxxxxxx>]

Hi, Ron.

A few weeks ago I read in the specs that the upcoming bytecode version still allows to fallback to the "old" verification mechanism, *unless* you state a special commandline parameter when starting up the JVM. With the bytecode version that follows the upcoming one, the new scheme is then mandatory.

Generally, I think that for the necessary stackframe attributes should most definitely go into the bytecode manipulation kit and not in the AspectJ code base, since it is not at all specific to AspectJ.

--
Eric Bodden
Sable Research Group, McGill University
Montréal, Québec, Canada


> -----Original Message-----
> From: aspectj-dev-bounces@xxxxxxxxxxx [mailto:aspectj-dev-
> bounces@xxxxxxxxxxx] On Behalf Of Ron Bodkin
> Sent: Friday, July 28, 2006 3:21 PM
> To: 'AspectJ developer discussions'
> Subject: RE: [aspectj-dev] JDK 1.6
> 
> How will AspectJ support split bytecode verification (JSR 202)? I'm not
> sure under what circumstances compiled code has to support it
> (presumably for
> -1.6 code?). If I remember right, I understood that code defined by a -
> javaagent will be verified with this change in Mustang: if that's
> right, then it would impose a need for AspectJ load-time weaving to
> construct verification proofs when weaving (just what we need: another
> time-consuming operation for LTW :-/). I know that Eugene Kuleshov and
> the ASM team spent a fair bit of time working on supporting split
> verification in ASM...
> 
> -----Original Message-----
> From: aspectj-dev-bounces@xxxxxxxxxxx
> [mailto:aspectj-dev-bounces@xxxxxxxxxxx] On Behalf Of Andy Clement
> Sent: Friday, July 28, 2006 11:43 AM
> To: AspectJ developer discussions
> Subject: Re: [aspectj-dev] JDK 1.6
> 
> Not quite true. The AspectJ 1.5.x compiler inside AJDT is based on the
> Eclipse 3.1.0 compiler.  In the next couple of months we will move to
> the 3.2 compiler and gain some of its support for 1.6.  There are
> further things that need doing for weaving 1.6 bytecode.
> 
> Andy.
> 
> On 28/07/06, Alexandru Popescu <the.mindstorm.mailinglist@xxxxxxxxx>
> wrote:
> > On 7/28/06, Berry, Eric <Eric_Berry@xxxxxxxxxxxxxxxxx> wrote:
> > >
> > > What are the plans for AspectJ to support JDK 1.6?  Can it be
> > > supported
> now
> > > or will there be so lag time after JDK 1.6 is released?
> >
> > The Eclipse compiler delivered with Eclipse 3.2 is already supporting
> > JDK1.6, so AJDT compiler which is based on Eclipse compiler is able
> to
> > make steps towards JDK1.6. At least this is what I know.
> >
> > ./alex
> > --
> > .w( the_mindstorm )p.
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