RFR: Upstream merge to jdk-12+14

[Aleksey Shipilev]

On 10/04/2018 12:50 PM, Roman Kennke wrote:
> Now that jdk/jdk is stable again, let's merge it, up to tage jdk-12+14.
> It brings a lot of goodies:
> 
> - 8210829: Modularize allocations in C2
> - 8210879: ClassLoaderStatsClosure does raw oop comparison
> - 8210857: Allow retiring TLABs and collecting statistics in parallel
> - 8210752: Remaining explicit barriers for C2
> - 8132849: Increased stop time in cleanup phase because of
> single-threaded walk of thread stacks in
> NMethodSweeper::mark_active_nmethods()
> - 8210885: Convert left over loads/stores to access api
> - 8211269: Make declaration of Allocation protected in MemAllocator
> - 8211241: Missing obj equals in TemplateTable::fast_aldc
> - 8211231: BarrierSetC1::generate_referent_check() confuses register
> allocator
> - 8210887: Tweak C2 gc api for arraycopy
> - 8211384: Obsolete -XX:+/-MonitorInUseLists option
> 
> Most of it reduces our upstream-diff. We shall pick up parallel TLAB
> retiring soon.
> 
> http://cr.openjdk.java.net/~rkennke/upstream-jdk12-merge-2018-10-04/outgoing.txt
> 
> Testing: tier3_gc_shenandoah ok
> 
> Ok to push?

OK.

-Aleksey