Summary: Add Darwin like Linux to shell scripts
Reviewed-by: kvn, kamg, dholmes

Summary: Added test that checks humongous object allocation path also check the heap occupancy and initiate a marking cycle when / if needed.
Reviewed-by: brutisso, jwilhelm

Reviewed-by: kvn

Summary: Avoid overcounting when CMS has concurrent mode failure.
Reviewed-by: ysr
Contributed-by: rednaxelafx@gmail.com

Summary: supply optinal flags to realize gc log rotation
Reviewed-by: ysr, jwilhelm

Summary: simple correction in testcase
Reviewed-by: mchung

Summary: Management code enabled for use by a concurrent collector.
Reviewed-by: mchung, ysr

Reviewed-by: iveresov

Reviewed-by: jmasa, iveresov