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

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

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

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

Reviewed-by: mgronlun, kamg

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

Summary: JVM_SetProtectionDomain has been deprecated since 1.5 and is being removed
Reviewed-by: coleenp, hseigel
Contributed-by: eric.mccorkle@oracle.com

Reviewed-by: dcubed, rbackman
Contributed-by: NJoel Borggren-Franck <joel.franck@oracle.com>

Summary: Recognize VM generated method in old verifier
Reviewed-by: acorn, coleenp
Contributed-by: bharadwaj.yadavelli@oracle.com

Summary: Remove Method* from backtrace but save version so redefine classes doesn't give inaccurate line numbers.  Removed old Merlin API with duplicate code.
Reviewed-by: dholmes, sspitsyn

Summary: Add hotspot support for parameter reflection
Reviewed-by: acorn, jrose, coleenp
Contributed-by: eric.mccorkle@oracle.com

Reviewed-by: dholmes, coleenp
Contributed-by: joel.franck@oracle.com

Summary: Added JVM_SetNativeThreadName to linker mapfiles on Solaris and Linux.
Reviewed-by: dcubed, dholmes
Contributed-by: michael.x.mcmahon@oracle.com

Reviewed-by: kvn, dholmes, stefank, coleenp

7010070: Update all 2010 Oracle-changed OpenJDK files to have the proper copyright dates - second pass
Summary: Update the copyright to be 2010 on all changed files in OpenJDK
Reviewed-by: ohair

Summary: Add option for gcc 4 and above, define JNIEXPORT and JNIIMPORT to visibility=default, add for jio_snprintf and others since -fvisibility=hidden overrides --version-script definitions.
Reviewed-by: kamg, never

7010068: Update all 2010 Oracle-changed OpenJDK files to have the proper copyright dates - first pass
Summary: Update the copyright to be 2010 on all changed files in OpenJDK
Reviewed-by: jcoomes

Summary: Change all the Sun copyrights to Oracle copyright
Reviewed-by: ohair

Reviewed-by: never
Contributed-by: NAndrew Haley <aph@redhat.com>

Reviewed-by: kamg, phh

Summary: Update copyright year for files that have been modified in 2008
Reviewed-by: ohair, tbell

Summary: adds JVM_FindClassFromBootLoader entry point, for jdk's use
Reviewed-by: dholmes, acorn

Summary: Initial checkin of JSDT code
Reviewed-by: acorn, sbohne

Summary: Moved makefiles out of build and build/closed into make/
Reviewed-by: kvn, ohair