Hi,
                                                                           
there is a problem when a breakpoint is set in an empty finalize()
method. Consider the following situation:
                                                                           
Class A has an empty finalize() method, so it would not take part in the
 finalizing game (no Finalizer refs allocated for objects of that class)
. Now a user sets a breakpoint in the finalize() method and after that
we load Class B, which has Class A as its superklass. Class B does not
overrides finalize(), so we would expect objects of Class B not to take
part in the finalizer game too.
                                                                           
But in ClassFileParser::set_precomputed_flags(), where it is detected if
 a class has a non-empty finalize() method, methodOopDesc::
is_empty_method() is called, which just checks the first bytecode of the
 method. But now we have the breakpoint bytecode at this place, so
methodOopDesc::is_empty_method() thinks the method is not empty and
objects of Class B are treated as having a non-empty finalize method.