8215034: Remove old HOTSWAP conditionals Reviewed-by: dcubed, jiangli, sspitsyn

8214972: Uses of klass_holder() except GC need to apply GC barriers Summary: Fix klass_holder() and make all callers use it, remove holder_phantom(). Reviewed-by: eosterlund, dlong

8214148: [TESTBUG] serviceability/tmtools/jstack/WaitNotifyThreadTest.java is not doing what is expected Summary: Fixed the logic for checking method name and added checks for thread status Reviewed-by: dholmes, coleenp

8204947: Port ShenandoahTaskTerminator to mainline and make it default Reviewed-by: tschatzl, rkennke

8213224: Move code related to GC threads calculation out of AdaptiveSizePolicy Summary: Consolidate code related to GC threads calculation into a single class Reviewed-by: tschatzl, pliden

8213421: Line number information for execution samples always 0 Reviewed-by: mgronlun

8214971: Replace use of string.equals("") with isEmpty() Reviewed-by: jlaskey, prappo, lancea, dfuchs, redestad

8212232: Wrong metadata for the configuration of the cutoff for old object sample events Reviewed-by: mgronlun

8214376: Don't use memset to initialize array of Bundle in output.cpp Reviewed-by: thartmann, shade

8207829: FlightRecorderMXBeanImpl is leaking the first classloader which calls it Reviewed-by: mgronlun

8214840: runtime/NMT/MallocStressTest.java timed out Summary: Add volatile to declaration of static field shared by multiple threads Reviewed-by: dcubed, dholmes, coleenp

8213890: Implementation of JEP 344: Abortable Mixed Collections for G1 Reviewed-by: tschatzl, kbarrett Contributed-by: erik.helin@oracle.com, stefan.johansson@oracle.com

8214936: assert(_needs_refill == 0) failed: Forgot to handle a failed IC transition requiring IC stubs Reviewed-by: kvn, thartmann, pliden

8215005: Missing include of runtime/os.hpp in zError.cpp after JDK-8214925 breaks build without precompiled headers Reviewed-by: shade

8214773: Replace use of thread unsafe strtok Reviewed-by: thartmann, dholmes

8212137: Remove JrtFileSystem finalize method Reviewed-by: alanb