Merge

8151653: Hotspot build does not respect --enable-openjdk-only
Reviewed-by: tbell, dholmes

8136458: Remove "marked for reclamation" nmethod state
Summary: Removed "marked for reclamation" nmethod state because only sweeper sets nmethods to zombie.
Reviewed-by: kvn, neliasso

8143226: Minor updates to Event Based tracing
Reviewed-by: jbachorik, egahlin

8149650: Create a trace event for G1 heap region type transitions
Reviewed-by: jwilhelm, sjohanss

8009538: [Event Request] Want events for tenuring distribution
Reviewed-by: jwilhelm, sjohanss

8149648: Add number of regions to the G1HeapSummary event
Reviewed-by: sjohanss, jwilhelm

8138562: Event based tracing should cover monitor inflation
Reviewed-by: dcubed, egahlin, mgronlun

8065331: Add trace events for failed allocations
Reviewed-by: brutisso, ehelin

8068394: Trace event for concurrent GC phases
Summary: Add concurrent phase events for CMS and G1
Reviewed-by: brutisso, stefank

8046936: JEP 270: Reserved Stack Areas for Critical Sections
Reviewed-by: acorn, dcubed

8136679: JFR event for adaptive IHOP
Reviewed-by: tbenson, mgerdin, sangheki, ehelin

8133530: Add JFR event for evacuation statistics
Summary: Introduce two new JFR events for young/old generation allocation statistics based on previous changes.
Reviewed-by: ehelin, mgerdin

8078901: Add trace event for G1 MMU information
Reviewed-by: ehelin, mlarsson

8025608: GC trace events missing nursery size information
Reviewed-by: sjohanss, mgerdin

8080947: Add uint as a valid VM flag type
Reviewed-by: brutisso, ddmitriev

8073607: add trace events for inlining
Reviewed-by: kvn, fzhinkin, mgronlun

8066441: Add PLAB trace event
Reviewed-by: tschatzl, ehelin, egahlin

8046809: vm/mlvm/meth/stress/compiler/deoptimize CodeCache is full.
Summary: Use separate sweeper thread; enables more aggressive sweeping.
Reviewed-by: kvn, jrose

8015774: Add support for multiple code heaps
Summary: Support for segmentation of the code cache. Separate code heaps are created and used to store code of different types.
Reviewed-by: kvn, iveresov, roland, anoll, egahlin, sla

8035667: EventMetaspaceSummary doesn't report committed Metaspace memory
Reviewed-by: jmasa, stefank

8036703: Add trace event with statistics for the metaspace chunk free lists
Reviewed-by: stefank, mgerdin, coleenp, egahlin

8036701: Add trace event when a metaspace throws out of memory error
Reviewed-by: stefank, mgerdin

8036699: Add trace event when a metaspace allocation fails
Reviewed-by: jmasa, stefank

8036698: Add trace event for updates to metaspace gc threshold
Reviewed-by: stefank, mgerdin

8036696: Add metaspace gc threshold to metaspace summary trace event
Reviewed-by: jmasa, stefank, mgerdin

8032250: Add trace event for VM flag changes
Reviewed-by: coleenp, ehelin, egahlin, mgronlun

8028128: Add a type safe alternative for working with counter based data
Reviewed-by: dholmes, egahlin

8020151: PSR:PERF Large performance regressions when code cache is filled
Summary: Code cache sweeping based on method hotness; removed speculatively disconnect
Reviewed-by: kvn, iveresov

8016331: Minor issues in event tracing metadata
Reviewed-by: stefank, brutisso, mgronlun

8005849: JEP 167: Event-Based JVM Tracing
Reviewed-by: acorn, coleenp, sla
Contributed-by: Karen Kinnear <karen.kinnear@oracle.com>, Bengt Rutisson <bengt.rutisson@oracle.com>, Calvin Cheung <calvin.cheung@oracle.com>, Erik Gahlin <erik.gahlin@oracle.com>, Erik Helin <erik.helin@oracle.com>, Jesper Wilhelmsson <jesper.wilhelmsson@oracle.com>, Keith McGuigan <keith.mcguigan@oracle.com>, Mattias Tobiasson <mattias.tobiasson@oracle.com>, Markus Gronlund <markus.gronlund@oracle.com>, Mikael Auno <mikael.auno@oracle.com>, Nils Eliasson <nils.eliasson@oracle.com>, Nils Loodin <nils.loodin@oracle.com>, Rickard Backman <rickard.backman@oracle.com>, Staffan Larsen <staffan.larsen@oracle.com>, Stefan Karlsson <stefan.karlsson@oracle.com>, Yekaterina Kantserova <yekaterina.kantserova@oracle.com>