In jdk8 the option to jmap "-permstat" should be removed. In jdk8 there is no longer
a perm gen so the option is not appropriate. Some new option and implementation for
class metadata (native memory allocation of some of the data previously in perm gen)
may be needed.

If the jdk8 jmap works with previous versions of the jdk/jre, some action when the
jdk8 jmap is operating on an earlier jdk/jre will need to be defined.