Isolated Methods JEP

[Michael Haupt]

Hi John,

> Am 13.08.2016 um 01:48 schrieb John Rose <john.r.rose at oracle.com>:
> This does lead me to an extra thought:  I think IM's could be given the capability to have multiple entry points.  This would allow a number of interesting applications, starting with exception handling that appeals to a helper object, instead of a handler table and some special verifier rules.
> 
> Immediately beyond that, although now I'm being a Mission Creep, if an IM has multiple entry points for exception handling, it could also use these entry points for frame resumption, as described by Ron Pressler in a previous JVMLS, and Andrey Breslav this year.  (That leads to the question of how an IM can yield to an suspension point, a very good question.  And something that a helper object can help with.  And so on.  This might help us do fibers experiments more quickly.)

multiple entry points would also, FWIW, enable OSR.

How to invoke a method with a specific entry point? Via Indy, with an extra argument?

The handler table that would go away if exception handling was conveniently pushed to a helper object would make a proud reappearance in the form of a valid entry point table. We don't want arbitrary jumps into the middle of things. :-)

Best,

Michael

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