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Re: GCJ not using java.lang.Exception in libgcj.jar??
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Tom Tromey <firstname.lastname@example.org> writes:
> >>>>> "Kevin" == Kevin A Burton <email@example.com> writes:
> Kevin> If you look at the UML on the website you can see visually how
> Kevin> JavaCore installs into the JVM. Basically it replace
> Kevin> java.lang.Exception with its own version.
> When you do this with the JVM I assume you have to edit their `rt.jar'
> or whatever it is called. Right?
yeah... you just run jar to update the rt.jar. It works with all classloaders
and JVMs so I haven't had a problem :). I think the default mechanism for GCJ
installation woudl be just to patch the source (JavaCore is GPL also) and then
> Kevin> Basically this means that java.lang.Exception is not getting
> Kevin> instantiated as bytecode but instead is native... correct?
> Yes. The entire runtime and all the default class libraries are
> compiled, not interpreted. We install the class files because the
> compiler needs to read them in order to compile other Java programs.
yeah... after sending my e-mail out that makes more sense. I will have to
investigate building a .so from a .jar and linking against it... hm...
> Kevin> Could this be the problem? java.lang.Exception under GCJ is
> Kevin> native and contained in libgcj.so? If so this is strange... I
> Kevin> can't see any advantage to doing this and I think it might be a
> Kevin> Bad Thing. There might be a speed advantage!?
> I doubt there is a noticeable speed advantage for Exception. However,
> I don't see how having this class be compiled could be considered a
> `Bad Thing'. I think what you're trying to do isn't really guaranteed
> to work. Also, libgcj is primarily a compiled Java environment. So
> compiling Exception is in line with our goals.
yeah... I don't know either... just bugs me a little. This could make dynamic
class loading wierd... maybe not. Need to think about it.
> Why do you need to reimplement Exception, anyway? That seems weird.
... I would just say read http://javacore.sourceforge.net ... this explains
Kevin A. Burton ( firstname.lastname@example.org, email@example.com, firstname.lastname@example.org )
Cell: 408-910-6145 URL: http://relativity.yi.org ICQ: 73488596
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