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Re: [DotGNU]Re: J2EE Support in VRS

From: Rhys Weatherley
Subject: Re: [DotGNU]Re: J2EE Support in VRS
Date: Sat, 06 Apr 2002 10:08:44 +1000

Open Source wrote:

> Instead of developing separate code for JVM and CLI.
> Why not have a small footprint VM which convers Java
> byte codes to CLI and let pnet handle the rest of the
> issue? This will help us in maintaining different VMs
> for different languages. This approach will help us
> moving other languages such as perl, python to CLI.

There are people working on JVM->CLI converters,
and CLI->JVM converters already, with varying levels
of success.  The semantic gap between the two engines
can make such conversion difficult.

The other approach, with Gopal is starting work on,
is to build a verifier for JVM that slots into the existing
pnet core.  This will allow pnet to run side by side in
the same engine, sharing all of the class handling, GC,
and interpreter/JIT code.

The verifier approach is easier than the conversion
approach, because the verifier is down-converting to
a much simpler instruction set (e.g. CVM), rather than
cross-converting to a semantically-rich instruction
set (JVM or CLI).



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