Summary: G1 now uses two reference processors - one is used by concurrent marking and the other is used by STW GCs (both full and incremental evacuation pauses). In an evacuation pause, the reference processor is embedded into the closures used to scan objects. Doing so causes causes reference objects to be 'discovered' by the reference processor. At the end of the evacuation pause, these discovered reference objects are processed - preserving (and copying) referent objects (and their reachable graphs) as appropriate.
Reviewed-by: ysr, jwilhelm, brutisso, stefank, tonyp

Reviewed-by: jcoomes, johnc

Summary: Cast HeapRegion::GrainBytes to size_t in output statement.
Reviewed-by: ysr, brutisso, pbk, tonyp

Summary: The desired min / max heap sizes are miscalculated at initialization when NewRatio is used. The changeset also includes an additional small change to turn a print statement into a warning.
Reviewed-by: johnc, jmasa, ysr, brutisso

Summary: Displays the elapsed time taken to perform reference processing during remark as part of the PrintGCDetails output.
Reviewed-by: ysr

Summary: Make sure the eden and survivor pools have "Space" in their name.
Reviewed-by: jmasa, ysr

Summary: As a result of the changes for 7080389, an evacuation failure during an initial mark pause may result in some root objects not being marked. Pass whether the caller is a root scanning closure into the evacuation failure handling code so that the thread that successfully forwards an object to itself also marks the object.
Reviewed-by: ysr, brutisso, tonyp

Summary: Extend the SA to recognize the G1CollectedHeap and implement any code that's needed by our serviceability tools (jmap, jinfo, jstack, etc.) that depend on the SA.
Reviewed-by: never, poonam, johnc

Reviewed-by: jmasa, ysr, kvn

Reviewed-by: kvn

Summary: shared fix necessary for ARM/PPC
Reviewed-by: twisti, roland

Summary: ARM only, avoid assertion failures for huge constants generated by C1 shared code
Reviewed-by: never, vladidan

Summary: Fixed warnings which prevent building VM with old compilers.
Reviewed-by: never

Summary: Replace assert with check to delete MachTemp nodes only when they are really dead.
Reviewed-by: never

Summary: When refactoring the code for a previous fix, a condition was not correctly negated which prevents the G1 policy from adding the correct number of old regions to the CSet when the young gen size is fixed. The changeset also fixes a small syntactical issue in g1ErgoVerbose.hpp which is causing compiler warnings.
Reviewed-by: brutisso, ysr

Reviewed-by: kvn, twisti

Reviewed-by: kvn

Reviewed-by: jrose, twisti, kvn, coleenp

Reviewed-by: kvn, twisti

Summary: Revert changes which caused regression.
Reviewed-by: never

Reviewed-by: brutisso, ysr

Summary: Make G1 handle young gen size command line flags more consistently
Reviewed-by: tonyp, jwilhelm

Summary: Fixed inconsistencies and mistakes in the young list target length calculations so that a) the calculated target length is optimal (before, it was not), b) other parameters like max survivor size and max gc locker eden expansion are always consistent with the calculated target length (before, they were not always), and c) the resulting target length was always bound by desired min and max values (before, it was not).
Reviewed-by: brutisso, johnc

Summary: PhaseChaitin::yank_if_dead() should be able to handle MachTemp inputs as a special case and yank them.
Reviewed-by: never, kvn

Reviewed-by: jrose, never

Summary: changes necessary for some JSR292 ports
Reviewed-by: jrose, dholmes

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: restore unrolling code for CaffeineMark.
Reviewed-by: never

Summary: It introduces ergonomic decision logging in G1 for the following heuristics: heap sizing, collection set construction, concurrent cycle initiation, and partially-young GC start/end. The code has a bit of refactoring in a few places to make the decision logging possible. It also replaces alternative ad-hoc logging that we have under different parameters and switches (G1_DEBUG, G1PolicyVerbose).
Reviewed-by: johnc, ysr

Summary: InterpreterRuntime::popframe_move_outgoing_args() is required for the ARM interpreter.
Reviewed-by: kvn, twisti

Summary: ARM has instructions to move data directly between the fpu and integer registers.
Reviewed-by: kvn, never

Reviewed-by: kvn

Summary: Add check that ciEnv::_CallSite_klass is initialized.
Reviewed-by: jrose

Reviewed-by: twisti, roland, kvn, iveresov

Summary: Use BIS and prefetch in arraycopy stubs for Sparc (BIS for T4 only).
Reviewed-by: never, iveresov

Reviewed-by: never

Reviewed-by: never, kvn

Summary: Remove the sentinelRef and let the last Reference in a discovered chain point back to itself.
Reviewed-by: ysr, jmasa

Reviewed-by: never

Reviewed-by: iveresov, kvn