Summary:
- From http://hg.openjdk.java.net/mlvm/mlvm/hotspot/file/4cd7d914b0e3/coro-simple.patch.
- Resolve trivial conflicts in: systemDictionary.hpp, thread.cpp, debug.hpp.
- Add an option "EnableCoroutine".

Test Plan: run jtreg tests

Reviewed-by: yuleil, shiyuexw, sanhong

Issue: https://github.com/alibaba/dragonwell8/issues/113

Summary: ported heap throttling feature of MultiTenant to Dragonwell8

Test Plan: hotspot/test/multi-tenant/

Reviewed-by: luchsh, mmyxym

Issue: https://github.com/alibaba/dragonwell8/issues/91

Summary: ported heap isolation feature of MultiTenant to Dragonwell8

Test Plan: hotspot/test/multi-tenant/

Reviewed-by: luchsh, mmyxym

Issue: https://github.com/alibaba/dragonwell8/issues/90

Summary: ported HotSpot interfaces to Dragonwell8 to support MultiTenant framework

Test Plan: jdk/test/multi-tenant

Reviewed-by: yuleil, sanhong

Issue: https://github.com/alibaba/dragonwell8/issues/84

Summary: G1ElasticHeap to support heap shrink/expansion in runtime

Test Plan:
test/elastic-heap/

Reviewers:

Issue:
https://github.com/alibaba/dragonwell8/issues/46

CR:
https://github.com/alibaba/dragonwell8_hotspot/pull/12

Summary:
  Port jwarmup to dragonwell 8u hotspot

ref T19299187

Test Plan:
test/hotspot/jtreg/jwarmup/Issue11272598.java
test/hotspot/jtreg/jwarmup/TestDisableNCE.java
test/hotspot/jtreg/jwarmup/TestNotDeoptJITMethod.sh
test/hotspot/jtreg/jwarmup/issue9780156.sh
test/hotspot/jtreg/jwarmup/TestEagerCompilation.java
test/hotspot/jtreg/jwarmup/TestNotifyDeopt.sh
test/hotspot/jtreg/jwarmup/TestCheckIfCompilationIsComplete.sh
test/hotspot/jtreg/jwarmup/TestFlagAssertion.java
test/hotspot/jtreg/jwarmup/TestReadLogfile.java
test/hotspot/jtreg/jwarmup/TestClassInitChain.java
test/hotspot/jtreg/jwarmup/TestLogFlush.java
test/hotspot/jtreg/jwarmup/TestRecordNullMethodCounter.java
test/hotspot/jtreg/jwarmup/TestThrowInitializaitonException.java
test/hotspot/jtreg/jwarmup/TestDisableMethodData.sh
test/hotspot/jtreg/jwarmup/TestMethodRecorder.java
test/hotspot/jtreg/jwarmup/TestTieredCompilationInRecording.sh

Reviewers: 传胜, 三红, yumin.qi

Reviewed By: 传胜, 三红

Subscribers: 麦庶

Differential Revision: https://aone.alibaba-inc.com/code/D852146

Reviewed-by: dholmes, alanb, rriggs

8199712: Flight Recorder
8203346: JFR: Inconsistent signature of jfr_add_string_constant
8195817: JFR.stop should require name of recording
8195818: JFR.start should increase autogenerated name by one
8195819: Remove recording=x from jcmd JFR.check output
8203921: JFR thread sampling is missing fixes from JDK-8194552
8203929: Limit amount of data for JFR.dump
8203664: JFR start failure after AppCDS archive created with JFR StartFlightRecording
8003209: JFR events for network utilization
8207392: [PPC64] Implement JFR profiling
8202835: jfr/event/os/TestSystemProcess.java fails on missing events
Summary: Backport JFR from JDK11. Initial integration
Reviewed-by: neugens

Summary: Introduce alignment-safe Copy::conjoint_swap and JVM_CopySwapMemory
Reviewed-by: mikael, dholmes

Reviewed-by: acorn, hseigel, ahgross, rhalade

Reviewed-by: coleenp, eosterlund, mchung, ahgross, rhalade

Reviewed-by: coleenp, eosterlund, mchung, ahgross, rhalade

Reviewed-by: acorn, ahgross, rhalade
Contributed-by: harold.seigel@oracle.com

Reviewed-by: chegar, acorn

Summary: Re-application of the change in JDK-8152271.
Reviewed-by: coleenp, sspitsyn

Summary: Re-application of the change in JDK-8152271.
Reviewed-by: coleenp, sspitsyn

Summary: Fix method searches to handle static, private instance and overpass
Reviewed-by: acorn

Summary: Add os::vsnprintf and os::snprintf.
Reviewed-by: kbarrett, lfoltan, stuefe, mlarsson

Summary: Under error conditions, always return -1 and perform null termination regardless of the behavior of underlying vsnprintf() implementation.
Reviewed-by: dholmes, cjplummer

Reviewed-by: jrose, hseigel, vlivanov, bmoloden, ctornqvi, mschoene

Reviewed-by: jrose, hseigel, vlivanov, bmoloden, ctornqvi, mschoene

Summary: Under error conditions, always return -1 and perform null termination regardless of the behavior of underlying vsnprintf() implementation.
Reviewed-by: dholmes, cjplummer

Summary: note all MemberNames created on internal list for adjusting method entries.
Reviewed-by: sspitsyn, dcubed, lfoltan

Summary: Implemented the interface in sun.misc.URLClassPath and corresponding JVM_XXX APIs
Reviewed-by: mchung, acorn, jiangli, dholmes

Summary: Cleaned up CDS to be more configurable, maintainable and extensible
Reviewed-by: dholmes, coleenp, acorn, mchung

8036630: Null ProtectionDomain in JVM can cause NPE because principals field is not initialized to an empty array
Summary: Call ProtectionDomain constructor instead of making all fields null.
Reviewed-by: fparain, zgu

Summary: Improve protection domain check in forName()
Reviewed-by: mchung, acorn, jdn

8043029: Change 8037816 breaks HS build with older GCC versions which don't support diagnostic pragmas
8043164: Format warning in traceStream.hpp
Summary: Backport of main fix + two corrections, enables clang compilation, turns on format attributes, corrects/mutes warnings
Reviewed-by: kvn, coleenp, iveresov, twisti

Reviewed-by: mgronlun, kamg

Reviewed-by: sla, zgu

4505697: nsk/jdi/ExceptionEvent/_itself_/exevent006 and exevent008 tests fail with InvocationTargetException
Reviewed-by: dcubed, dholmes, sspitsyn

8033150: invokestatic: IncompatibleClassChangeError trying to invoke static method from a parent in presence of conflicting defaults.
Summary: A static method should be preferred during method resolution over an overpass, search the current class as well as its superclasses.
Reviewed-by: acorn, coleenp, kamg

Summary: Move redo of ParkEvent.unpark() after JVMTI_EVENT_MONITOR_WAITED event handler is called.
Reviewed-by: rdurbin, acorn, sspitsyn, dsimms, dholmes

Summary: Introduce alignment-safe Copy::conjoint_swap and JVM_CopySwapMemory
Reviewed-by: mikael, dholmes

Reviewed-by: dholmes, kvn, stefank, twisti

Reviewed-by: alanb, dholmes, twisti
Contributed-by: mandy.chung@oracle.com

Summary: The two functions were used to support JDK 1.3 but are no longer in use
Reviewed-by: coleenp, ctornqvi, twisti, dsamersoff

Reviewed-by: dholmes, kvn

Summary: Need to refetch each method from InstanceKlass after all safepoints.  Removed leaky PreviousVersionInfo code.
Reviewed-by: dcubed, sspitsyn

Summary: Enhance method resolution and resulting data structures, plus some refactoring.
Reviewed-by: twisti, acorn, jrose