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

This reverts commit 5382b8e0.

This reverts commit 174fa73f.

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: Various small fixes around strncpy and strncat
Reviewed-by: andrew

Test Plan: existing test cases

Reviewed-by: shiyue, kuaiwei

Issue: https://github.com/alibaba/dragonwell8/issues/52

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

Reviewers: 效山, 芳玺, 传胜, 三红, yumin.qi

Reviewed By: 三红, 芳玺, 效山, 卓仁

Differential Revision: https://aone.alibaba-inc.com/code/D815657

Reviewed-by: aph

Summary: Synchronize gcLogFileStream::write/rotate_log
Reviewed-by: adinn, phh, snazarki
Contributed-by: xxinliu@amazon.com

Reviewed-by: mdoerr, kbarrett, tschatzl

Reviewed-by: tschatzl, kbarrett

Reviewed-by: stuefe, zgu

Reviewed-by: shade, mdoerr

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

Reviewed-by: sla, kbarrett, gziemski

Reviewed-by: stuefe, tschatzl

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

Summary: Correction of failed backport of JDK-8211394 via JDK-8212696.
Reviewed-by: dholmes, coffeys

Reviewed-by: dbuck

Summary: Backport from JDK12
Reviewed-by: dholmes

Summary: Backport from JDK9
Reviewed-by: dholmes, coffeys

Reviewed-by: stuefe, stefank

Reviewed-by: ctornqvi, coleenp, gtriantafill, dholmes

Summary: Make appending found dead BasicHashtableEntrys to the free list atomic.
Reviewed-by: ehelin, shade

Summary: Use the Events::log function to save redefined classes for output to the hs_err file
Reviewed-by: dholmes

Summary: Made EMPTY_STACK non-const, so it will not be placed in read-only BSS section.
Reviewed-by: stuefe, martin
Contributed-by: zhaixiang@loongson.cn

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

Summary: Before processing an element in the non-shared overflow buffer, try to push it into the local shared buffer to keep it full.
Reviewed-by: jmasa, ehelin, sjohanss

Summary: Track initialized final field updates; disable constant folding if an update is detected.
Reviewed-by: vlivanov, dnsimon, forax, never, kvn, coleenp

Summary: Before processing an element in the non-shared overflow buffer, try to push it into the local shared buffer to keep it full.
Reviewed-by: jmasa, ehelin, sjohanss

Reviewed-by: coleenp, roland

Summary: Thread id is now displayed as a hex number in error report.
Reviewed-by: dholmes, hseigel, stuefe

Reviewed-by: stuefe, dsamersoff, dcubed

Summary: Instead of 'fpclass', use cast float->int and double->long to check if value is +0.0f and +0.0d, respectively.
Reviewed-by: kvn, simonis, dlong

Summary: Relax the guaranty for deleted methods
Reviewed-by: dcubed, coleenp

Summary: Force all Solaris builds to use the same version of the DIR structure.
Reviewed-by: dcubed, dholmes, kvn

Reviewed-by: dholmes
Contributed-by: cheleswer.sahu@oracle.com

Summary: Make appending found dead BasicHashtableEntrys to the free list atomic.
Reviewed-by: ehelin, shade

Summary: refactor close to remove references to closed ports
Reviewed-by: kvn, simonis, sgehwolf, dholmes