Summary: If and when the reference handler thread is able to use the discovered field to link reference objects in its pending list, so will GC. In that case, GC will scan through this field once a reference object has been placed on the pending list, but not scan that field before that stage, as the field is used by the concurrent GC thread to link discovered objects. When ReferenceHandleR thread does not use the discovered field for the purpose of linking the elements in the pending list, as would be the case in older JDKs, the JVM will fall back to the old behaviour of using the next field for that purpose.
Reviewed-by: jcoomes, mchung, stefank

Summary: Implement a more accurate is_scavengable()
Reviewed-by: stefank, jcoomes, ysr

Summary: Removed.
Reviewed-by: jcoomes, brutisso

Summary: missing null check in owns_pending_list_lock() because this can be called before pending_list_lock is initialized.
Reviewed-by: never, kvn

Summary: Don't acquire methodData_lock while holding pending list lock
Reviewed-by: kvn, never, ysr

Summary: Replaced MakeDeps and the includeDB files with more standardized solutions.
Reviewed-by: coleenp, kvn, kamg

Summary: Remove the breadth-first copying order from ParallelScavenge and use depth-first by default.
Reviewed-by: jcoomes, ysr, johnc

Summary: Change all the Sun copyrights to Oracle copyright
Reviewed-by: ohair

Reviewed-by: kvn, twisti

Summary: Source changes for older compilers plus makefile changes.
Reviewed-by: xlu

Summary: Update copyright for files that have been modified in 2009 through Septermber
Reviewed-by: tbell, ohair

Reviewed-by: jmasa, iveresov

Reviewed-by: tonyp, iveresov

Summary: Modifications to G1 so as to allow the use of compressed oops.
Reviewed-by: apetrusenko, coleenp, jmasa, kvn, never, phh, tonyp

Summary: Update copyright year for files that have been modified in 2008
Reviewed-by: ohair, tbell

Summary: First mercurial integration of the code for the Garbage-First garbage collector.
Reviewed-by: apetrusenko, iveresov, jmasa, sgoldman, tonyp, ysr

Summary: Compressed oops in instances, arrays, and headers. Code contributors are coleenp, phh, never, swamyv
Reviewed-by: jmasa, kamg, acorn, tbell, kvn, rasbold