Summary:
Port 8202353 from lastest jdk, in order to fix compatibility of 8u232 api change instead of the origin openjdk8 patch
Buglist ref: https://bugs.openjdk.java.net/browse/JDK-8202353
Fix ref: http://hg.openjdk.java.net/jdk/jdk/rev/f605c91e5219

Test Plan:
Successfully build Dragonwell8, and pass jfr tests.

Reviewed-by: D-D-H,luchsh,sanhong

Issue: https://github.com/alibaba/dragonwell8/issues/73

Summary: add support for opto object allocations sampling

Test Plan: test/jfr/event/objectsprofiling/TestOptoObjectAllocationsSampling.java

Reviewers: zhengxiaolinX, luchsh, sanhong

Issue: https://github.com/alibaba/dragonwell8/issues/64

Summary: Fix build issues on Windows/Mac from G1ElasticHeap

Test Plan:
test/elastic_heap/

Reviewers:
shiyuexw, sanhong

Issue:
https://github.com/alibaba/dragonwell8/issues/54

CR:

Summary: add jwarmup symbols to mapfile

Test Plan: build successful

Reviewers: shiyue, sanhong

Issue: https://github.com/alibaba/dragonwell8/issues/53

CR: https://github.com/alibaba/dragonwell8_hotspot/pull/18

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

Test Plan: existing test cases

Reviewed-by: shiyue

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

Test Plan: existing test cases

Reviewed-by: shiyue, kuaiwei

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

Summary:
  change build script and to code to support windows platform

Test Plan:
  existing test cases

Reviewers:
  shiyue, chuansheng

Issue:
  https://aone.alibaba-inc.com/task/22514166

CR:

Summary: Invoke JWarmup APIs via jcmd

Test Plan: test/jwarmup/jcmd/TestInvokeJWarmupViaJcmd.java

Reviewers: kuaiwei, luchsh

Issue: https://aone.alibaba-inc.com/task/22023553

CR: https://aone.alibaba-inc.com/task/22023553

Summary: _mini_dump is not initialized for all paths

Test Plan: test/serviceability/

Reviewed-by: D-D-H, kuaiwei

Issue: https://github.com/alibaba/dragonwell8/issues/45

[C2] Backport JDK-8010500: Possible null pointer dereference at hotspot/src/share/vm/opto/loopnode.hpp

Summary:  Added NULL check for loopnode() in get_pre_loop_end()
Backport the fix for JDK-8010500 (https://hg.openjdk.java.net/jdk9/jdk9/hotspot/rev/4e7ee57b57bf) from OpenJDK.

Test Plan: none

Reviewed-by: kuaiwei, luchsh

Issue: https://github.com/alibaba/dragonwell8/issues/13

Summary: add compatibility for UnlockCommercialFeatures

Test Plan: test/jfr/test_unlockCommercialFeatures_compatibility.sh

Reviewed-by: yfxhust, luchsh

Issue: https://github.com/alibaba/dragonwell8_hotspot/issues/6

Summary: remove useless fields of ThreadAllocationStatistics

Test Plan: jdk/test/jdk/jfr/event/runtime/TestThreadAllocationEvent.java

Reviewed-by: yfxhust, luchsh

Issue: https://github.com/alibaba/dragonwell8_hotspot/issues/5

Summary:
fix typo error in test case

Test Plan: test/jwarmup/TestClassInitChain.java

Reviewed-by: luchsh

Issue: https://github.com/alibaba/dragonwell8/issues/16

Summary: whitebox library is missing in TestThrowInitializaitonException.java

Test Plan: hotspot/test/jwarmup/TestThrowInitializaitonException.java

Reviewers: 三红, 传胜

Reviewed By: 三红, 传胜

Subscribers: 麦庶

Differential Revision: https://aone.alibaba-inc.com/code/D855652

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

Summary:
- add a warning of large array allocation
- port D3674 to dragonwell

Test Plan: test/runtime/memory/TestArrayAllocationWarning.java

Reviewers: 传胜

Differential Revision: https://aone.alibaba-inc.com/code/D851704

Summary:
- The original GC printing did not change in the gc log after a full gc, this patch will fix this printing problem
- port D65612 to dragonwell

Test Plan: hotspot/test/gc/metaspace/TestMetaspaceGCLogSize.java

Reviewers: 传胜

Differential Revision: https://aone.alibaba-inc.com/code/D851703

Summary:
- port D64010 to dragonwell
- print the detail time when doing root processing in generational heap collection

Test Plan:
hotspot/test/gc/TestPrintGCRootsTraceTime.java
hotspot/test/gc/

Reviewers: 传胜

Differential Revision: https://aone.alibaba-inc.com/code/D851700

Summary:
- Port D65580 to dragonwell
- Print the young generation histogram once after parnew gc with the manageable flag: PrintYoungGenHistoAfterParNewGC

Test Plan: hotspot/test/gc/parNew/testPrintYoungGenHisto.sh

Reviewers: 传胜

Differential Revision: https://aone.alibaba-inc.com/code/D849729

Summary:
- port D1840 to Dragonwell
- add AJVM_FLAGS extension flag

Test Plan: the other patches which add new VM flags will definitely cover this code change

Reviewers: 传胜

Differential Revision: https://aone.alibaba-inc.com/code/D849610

Summary:
- Port D336179 mini-heapdump support to Dragonwell
- Enable HotSpot to skip dumping content of primitive type arrays

Test Plan: hotspot/test/serviceability, jdk/test/ras

Reviewers: 井桐

Reviewed By: 井桐

Differential Revision: https://aone.alibaba-inc.com/code/D849312

Summary:
- Port fix D2553 to Dragonwell
- Change default GC policy to UseConcMarkSweepGC

Test Plan: hotspot/test/gc/TestDefaultGC.sh

Reviewers: 井桐

Reviewed By: 井桐

Subscribers:

Differential Revision: https://aone.alibaba-inc.com/code/D849276

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: andrew

Summary: Updated the info based on MUSCLE v1.8.24
Reviewed-by: ascarpino

Summary: Better parsing of /proc/pid/maps in sa
Reviewed-by: sspitsyn, sla

Reviewed-by: prr, jdv, kcr

Summary: Don't double-free cached class bytes on redefinition loading failure.
Reviewed-by: sspitsyn, jiangli

Reviewed-by: mgerdin, tschatzl

8155951: VM crash in nsk/jvmti/RedefineClasses/StressRedefine: assert failed: Corrupted constant pool
8151066: assert(0 <= i && i < length()) failed: index out of bounds
Summary: lock classes for redefinition because constant pool merging isn't thread safe, use method constant pool because constant pool merging doesn't make equivalent cpCaches because of invokedynamic
Reviewed-by: shade, andrew

Summary: Prepare Zero build for backport of JDK-8062808.
Reviewed-by: sgehwolf

8226798: JVM crash in klassItable::initialize_itable_for_interface(int, InstanceKlass*, bool, Thread*)
Summary: When calculating vtable size at class load time, do not look for miranda method if matching package private method is found in a super class.
Reviewed-by: acorn, lfoltan

Summary: increase code_size2 for stubs
Reviewed-by: iveresov

Reviewed-by: kvn

Summary: convert the assert into compilation check which will skip superword optimization
Reviewed-by: roland, thartmann