JVMDI: No mechanism for handling more than one VM

Access to JVMDI in JDK1.2beta4 is through global entry points. Thus access
to multiple VMs is difficult or impossible. This global approach also
disallows a VM from providing more than one version of the JVMDI.

JNI solves these problems by using access through a function table.
JVMDI should adopt a similiar approach. This would also make it more
stylistically compatible with JNI, on which JVMDI is built.
robert.field@Eng 1998-08-03