Which classes need to be supplied by any JVM?
martinrb at google.com
Thu Aug 20 10:32:44 PDT 2009
The set of all public APIs that must be part of the java se platform
are tested by the platform tck, in particular by the "signature test",
and you can get the sources for that test (for research only)
and from that it should be possible (with work) to get a list of
all required classes. But that's a very large list, so is probably not
what you want. In practice, the subset of rt.jar of public classes
matching java.* or javax.* is a pretty good approximation.
On Thu, Aug 20, 2009 at 08:26, Carsten Otto
<otto at informatik.rwth-aachen.de>wrote:
> I am working on automated termination analysis of Java Bytecode and I am
> missing an important bit of information in the Java Virtual Machine
> Specification (JVMS). I'd be happy to get some help from you!
> Every JVM needs to provide certain classes including code for their native
> methods, e.g. java.lang.Object (obvious) and java.io.Serializable (because
> every array implements it). The list of such classes can easily be
> extended, but I have huge problems finding a lower bound to keep this list
> as small as allowed according to the JVMS.
> Is there some part of the specification that states which classes need to
> be provided? I can only see references to the API (e.g. "reflective APIs"),
> but no clear definition of the classes that need to exist. In the current
> draft for JVMS 3rd edition, the necessity to include java.io.Serializable
> is not even part of the JVMS, this is only visible by looking at the
> definition of arrays in the Java Language Specification (JLS).
> Some hints in this direction are also appreciated. So far I can only guess,
> that sun.awt.* is not part of the language defined in the JVMS - but who
> : Sadly, just using whatever Sun or OpenJDK provide in rt.jar does not
> Thanks a lot,
> Carsten Otto otto at informatik.rwth-aachen.de
> LuFG Informatik 2 http://verify.rwth-aachen.de/otto/
> RWTH Aachen phone: +49 241 80-21211
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