Expose heap metadata via tables

[vlsi]

For instance:

• list of classes
  Partially covered with select * from java.lang.Class
• list of class fields
• static field values

[dgroup]

@vlsi is it possible to do it in oracle-way tables like user_objects, user_tab_columns ?
It will be more familiar/clear for developers.

[vlsi]

I'm not sure user_objects / user_tab_columns can represent class/classloader/interface hierarchy.