[Sablevm-developer] Re: Odonata+SableVM+Classpath works! (and bootclasspath question)

[David <db...@cs...>]

On Mon, Apr 05, 2004 at 10:14:11AM +0100, S. Meslin-Weber wrote:
> Hi everyone,
>=20
> As reported on #sablevm I'm happy to say that Odonata[1] runs well unde=
r
> SableVM. I haven't measured any speeds or memory usage but with regards
> to visual output SableVM is on a par with GIJ (both use GNU Classpath,
> I know, but I didn't want to assume that all JVM using GNU Classpath
> would give the same results). I believe that the GNUClasspath AWT is th=
e
> cause of any visual/behavioural discrepancies I see when running Odonat=
a
> on SableVM (and GIJ) and on Sun's 1.4.2 Java2 SDK.
>=20

Hi,

Good work!

> On a related note, I develop Odonata against Sun's 1.4.2 Java2 SDK and
> make use of the -Xbootclasspath/p feature to prepend my classes ahead o=
f
> the JVM's own classes so that mine will be loaded in preference to any
> default ones.
>=20
> With SableVM I had to resort to extracting my jar file *over* SableVM's
> core classpath installation. This is due to the bootclasspath argument
> in SableVM seemingly not being able to take more than one path. Ideally=
,
> Sun-like arguments to override, append or prepend to the bootclasspath
> would be highly beneficial.
>=20

Yes, this functionality is currently not in SableVM.

In case you or some SableVM developer is interested, it should
be relatively easy to change the code in:
function _svmh_bootcl_internal_load_class_file
in file src/libsablevm/class_loader.c
to parse the boot class path property for multiple paths.

This will allow an override but with multiple paths.  Ex:
your_path:sablevm_boot_classpath

The next step will consist of playing with src/sablevm/sablevm.c
to add append, prepend options.



David

---

David B=E9langer
Graduate Student
School of Computer Science
McGill University
Office: MC226

Web page:   http://www.cs.mcgill.ca/~dbelan2/
Public key: http://www.cs.mcgill.ca/~dbelan2/public_key.txt