Summary: Remove PermGen, allocate meta-data in metaspace linked to class loaders, rewrite GC walking, rewrite and rename metadata to be C++ classes
Reviewed-by: jmasa, stefank, never, coleenp, kvn, brutisso, mgerdin, dholmes, jrose, twisti, roland
Contributed-by: Njmasa &lt;jon.masamitsu@oracle.com&gt;, stefank &lt;stefan.karlsson@oracle.com&gt;, mgerdin &lt;mikael.gerdin@oracle.com&gt;, never <tom.rodriguez@oracle.com>

7151532: DCmd for hotspot native memory tracking
Summary: Implementation of native memory tracking phase 1, which tracks VM native memory usage, and related DCmd
Reviewed-by: acorn, coleenp, fparain

Reviewed-by: acorn, dcubed, rbackman

Reviewed-by: dholmes, dcubed, kamg

Summary: Make GCStatInfo a resource object
Reviewed-by: phh, coleenp

Summary: Handlize MemoryUsage klass oop in createGCInfo routine
Reviewed-by: tonyp, fparain, ysr, jcoomes

Summary: Add a notification to the GarbageCollectorMXBeans
Reviewed-by: acorn, mchung