8199417: Modularize interpreter GC barriers Reviewed-by: coleenp, rkennke

8201265: Native memory leak in ClassLoader::add_to_exploded_build_list Summary: Allocate from temporary thread local memory instead of C heap memory. Reviewed-by: coleenp, dholmes, lfoltan

8201427: Fix Minimal VM builds on Linux x64 Reviewed-by: shade

8201370: GC specific data is referred from common precompiled headers and defNewGeneration.cpp Reviewed-by: stefank, shade, dholmes Contributed-by: boris.ulasevich@bell-sw.com

8200233: Simple G1 evacuation path performance enhancements Summary: Implement some minor performance optimizations in the evacuation path including changing some stores to be OOP_NOT_NULL, specializing the compressed/uncompressed oops path and delay some load of the current heapregion until absolutely necessary. Reviewed-by: kbarrett, sjohanss

8201365: Remove G1Policy::should_process_references() Reviewed-by: shade

8201247: Various cleanups in the attach framework Reviewed-by: goetz, cjplummer

8200228: Change default value of HeapSizePerGCThread Reviewed-by: tschatzl, shade, jwilhelm

8200195: serviceability/jvmti/FieldAccessWatch/FieldAccessWatch.java crashes with "assert(thread->thread_state() == _thread_in_native) failed: coming from wrong thread state" Reviewed-by: sspitsyn, cjplummer

8194812: Extend class-data sharing to support the module path 8199360: Rework the support for the 'ignored' module options in CDS Reviewed-by: jiangli, lfoltan, iklam, mseledtsov

8198313: Wrap holder object for ClassLoaderData in a WeakHandle Summary: Use WeakHandle for ClassLoaderData::_holder so that is_alive closure is not needed Reviewed-by: rehn, kbarrett

8201321: NMT: Unnecessary re-recording thread stack and size when attaching listener to JavaThread Summary: Replaced recoding thread stack and size with assertion Reviewed-by: dholmes, coleenp

8201334: Move runtime/NMT/MallocStressTest.java to hotspot_tier3_runtime Reviewed-by: lfoltan, mseledtsov, mikael

8201217: Split specialized_oop_closures.hpp into GC specific files Reviewed-by: sjohanss, eosterlund

8201244: Clean out unnecessary includes of heap headers Reviewed-by: coleenp, shade

8201209: Separate out CMS specific functions into CMSCardTable Reviewed-by: eosterlund, sjohanss

8201175: Move FilteringClosure::do_oop to genOopClosures Reviewed-by: tschatzl, sjohanss

8201168: Move GC command line constraint functions to GC specific files Reviewed-by: gziemski, sjohanss

8200759: Move GC entries in vmStructs.cpp to GC specific files Reviewed-by: sjohanss, shade

8201359: Incorrect header guards after JDK-8198949 (Modularize arraycopy stub routine GC barriers) Reviewed-by: stefank, dholmes

8201218: PPC64: Avoid use of yield instruction on spinlock Reviewed-by: mdoerr, goetz

8200385: Eagerly reclaimed humongous objects leave mark in prev bitmap Summary: Also clear marks on prev bitmap on eager reclaim Reviewed-by: sangheki, sjohanss

8199736: Define WIN32_LEAN_AND_MEAN before including windows.h Reviewed-by: erikj, ihse, kbarrett, dholmes

8200550: Xcode 9.3 produce warning -Wexpansion-to-defined Summary: Removed problem macros. Reviewed-by: tschatzl, dholmes, coleenp

8187472: AARCH64: array_equals intrinsic doesn't use prefetch for large arrays Reviewed-by: dsamersoff

8201185: AARCH64: bfm instruction encoding hits assert on zero register Reviewed-by: dsamersoff

8199735: Mark word updates need to use Access API Reviewed-by: shade, eosterlund

8201242: Include source file/line number when reporting native call stack on supported platforms Summary: Added source file/line number to native call stack reporting on supported platforms Reviewed-by: adinn, stuefe, dcubed

8201167: Remove MacroAssembler::cmp_heap_oop on x86 Reviewed-by: kvn, tschatzl

8201171: Cleanup in g1CollectedHeap, change CamelCase to snake_case Reviewed-by: sjohanss, tschatzl

8200697: Add utility for spin wait with fallback to yield/sleep Summary: Added SpinYield utility class. Reviewed-by: dcubed, coleenp, dholmes Contributed-by: kim.barrett@oracle.com, robbin.ehn@oracle.com

Merge