7031614: jmap -permstat fails with java.lang.InternalError in sun.jvm.hotspot.oops.OopField.getValue
Reviewed-by: kvn, dcubed
There were some places that were finding static fields by iterating
over the InstanceKlass object which I missed in my original changes.
I added an iterateStaticFields that hides the owner the static fields
and uses the OopVisitor.getObj to return the proper object. I
inspected all the iterateFields call sites to make sure I didn't miss
any. Additionally iteration of the mirror wasn't visiting the static
fields so some roots might be missed by the reverse pointers analysis.
There is heap iteration code in the SA and the InstanceMirrorKlass
wasn't plugged into the the oop sizing logic in the SA which caused
some searches to fail. I needed to add access to oop_size so I moved
the java_lang_Class style utilities into their own class and made them
like normal SA style classes. Tested with the full tmtools suite that
showed these issues plus some other which don't appear to have been