Merge

8210561: Command-line help wrong for javac --module Reviewed-by: darcy

8213299: runtime/appcds/jigsaw/classpathtests/EmptyClassInBootClassPath.java failed with java.lang.NoSuchMethodException Reviewed-by: dholmes

8215648: remove equals and hashCode implementations from j.l.i.VarHandle Reviewed-by: mchung

8216482: Shenandoah: typo in ShenandoahBarrierSetC2::clone_barrier_at_expansion() causes failed compilations Reviewed-by: thartmann, shade, rkennke

8215754: ZGC: nmethod is not unlinked from Method before rendezvous handshake Reviewed-by: pliden, neliasso

8216376: [PPC64] Possibly unreliable stack frame resizing in template interpreter Reviewed-by: goetz, gromero

8215244: jdk/jshell/ToolBasicTest.java testHistoryReference failed Summary: Mark history entries from previous sessions with timestamp that is definitelly in the past. Reviewed-by: rfield

8211841: [testbug] sun/nio/cs/OLD/TestIBMDB.java does not compile (aix) Reviewed-by: alanb, goetz

8215889: assert(!_unloading) failed: This oop is not available to unloading class loader data with ZGC Reviewed-by: coleenp, neliasso

8216401: Allow "file:" URLs in Class-Path of local JARs Reviewed-by: alanb, mchung

8215549: Shenandoah deduplication cleans up table/queue twice Reviewed-by: rkennke

8215482: check for cycles in type variables can provoke NPE Reviewed-by: mcimadamore

8216308: StackTraceElement::fill_in can use injected Class source-file Reviewed-by: coleenp, dholmes

8216265: [testbug] Introduce Platform.sharedLibraryPathVariableName() and adapt all tests. Summary: Also cleanup some switches over OSes and use File.pathSeparator. Reviewed-by: dholmes, mdoerr

8216973: Kick up cleanup phases in the right places Reviewed-by: shade

8216478: Cleanup HttpResponseImpl back reference to HttpConnection Summary: Retain a reference to Exchange and HttpConnection only when necessary, i.e. for WebSocket initial connection. Reviewed-by: chegar

8199892: Missing landmarks when generating docs using html sources Reviewed-by: jjg

8213249: compiler/graalunit/HotspotTest.java failed in ExplicitExceptionTest Summary: Added -XX:-OmitStackTraceInFastThrow to test flags to avoid empty exception message. Reviewed-by: epavlova, iignatyev, dlong, kvn

8216560: gtest build broken on PPC64 and aarch64 Reviewed-by: shade

8215544: SA: Modify ClhsdbLauncher to add sudo privileges to enable MacOS tests on Mach5 Summary: Check if 'sudo' privileges can be added for executing macOS tests, and if so, add these privileges before executing the tests Reviewed-by: jcbeyler, phh, sballal

8214816: os::read() should not transition to _thread_blocked with safepoint check on Solaris Reviewed-by: jiangli, mgronlun

8216595: Fix broken builds after JDK-8216424 Reviewed-by: redestad, alanb

8216424: Remove TimeLivenessAnalysis Reviewed-by: kvn, thartmann

8216589: s390x build failures after JDK-8216167 (Update include guards to reflect correct directories) Reviewed-by: dholmes

8216140: Correct UnicodeDecoder U+FFFE handling Reviewed-by: rriggs

8216184: CDS/appCDS tests failed on Windows due to long path to a classlist file Summary: use os::open() instead of fopen() Reviewed-by: iklam, dholmes

8216559: [JFR] Native libraries not correctly parsed from /proc/self/maps Summary: Use %7s for the dev scan format as major:minor may be up to that length Reviewed-by: mgronlun, jwilhelm