8160399: is_oop_or_null involves undefined behavior
8164984: Improper use of is_oop in production code
Summary: replace oop->is_oop*() with oopDesc::is_oop*(oop) so this pointer can be verified
Reviewed-by: iklam, kvn, dholmes

8184994: Add Dictionary size logging and jcmd
Summary: added dcmd for printing system dictionary like the stringtable and symboltable and making print functions go to outputstream rather than tty
Reviewed-by: shade, hseigel

7133093: Improve system dictionary performance
Summary: implement one dictionary per ClassLoaderData for faster lookup and removal during class unloading
Reviewed-by: iklam, acorn, jiangli

8181917: Refactor UL LogStreams to avoid using resource area
Reviewed-by: ehelin, mlarsson

8166848: Performance bug: SystemDictionary - optimization
Summary: Check instead that a bucket isn't 10x the average
Reviewed-by: iklam, gziemski, sspitsyn

8178336: Unnecessary SystemDictionary walk for Protection domain liveness
Summary: remove system dictionary walk and pass strong closure for !ClassUnloading
Reviewed-by: jiangli, iklam