6942771: SEGV in ParScanThreadState::take_from_overflow_stack
Reviewed-by: apetrusenko, ysr, pbk

Summary: Re-enable use of the lock-free versions of region stack push() and pop() by recording aborted regions in a thread-local structure, which are then processed when scanning of the region stack restarts. The previous locking versions of these routines are retained for diagnostic purposes.
Reviewed-by: tonyp, ysr

Reviewed-by: ohair

Summary: Associate number of GC workers with the workgang as opposed to the task.
Reviewed-by: johnc, ysr

Reviewed-by: ohair, kvn

Summary: Pass correct value for length to NumberSeq constructor. Guard dereferences of "body_summary" pointer with a NULL check.
Reviewed-by: tonyp, ysr

Summary: Emit a fake frame that makes it look like the thread is in the OutOfMemoryError zero-parameter constructor
Reviewed-by: dcubed

Summary: Fixed comment/documentation typos; converted some guarantee()s to assert()s.
Reviewed-by: jmasa

Summary: Update the Major and Build numbers for HS20
Reviewed-by: jcoomes

Summary: Use javac's @filename construct to avoid long compile lines
Reviewed-by: ohair, twisti, never
Contributed-by: doko@ubuntu.com

Summary: See synopsis
Reviewed-by: ohair

Summary: Must check locals for null when processing chop frame
Reviewed-by: dholmes, dcubed

Summary: Implementation of a nonproduct boolean flag XX:PrintFlagsWithComments
Reviewed-by: kamg, dholmes, dsamersoff

Reviewed-by: kvn

Summary: Fix code in TypeAryPtr::xmeet() for constant array.
Reviewed-by: never

Reviewed-by: kvn

Summary: Use resource memory instead of c-heap for the exception message
Reviewed-by: phh, jmasa

Summary: An assert in the management.cpp is too strong and assumes the max size is always defined on memory pools, even when we don't need to use it.
Reviewed-by: mchung, johnc

Summary: simple correction in testcase
Reviewed-by: mchung

Summary: This is a preparation for 6961690.
Reviewed-by: kvn, never

Summary: Use NULL as klass for TypeAryPtr::RANGE. Add klass verification into TypeAryPtr ctor.
Reviewed-by: never

Summary: Disable stack bounds checks in product mode other than for the initial thread
Reviewed-by: coleenp, jcoomes, aph

Reviewed-by: tonyp, ysr

Summary: The way we were caluclating the max value meant that it might fluctuate during the run and this broke some assumptions inside the MBeans framework. This change sets the max value of each pool to -1, which means undefined according to the spec.
Reviewed-by: mchung, johnc

Summary: This is the renaming part of 6961697 to keep the actual changes small for review.
Reviewed-by: kvn, never