Summary: G1ElasticHeap to support heap shrink/expansion in runtime

Test Plan:
test/elastic-heap/

Reviewers:
luchsh, sanhong

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

CR:
https://github.com/alibaba/dragonwell8_jdk/pull/1

Test Plan: existing test cases

Reviewed-by: shiyue, kuaiwei

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

Summary: port http://phabricator.alibaba.net/D2815 to Dragonwell8

Test Plan: test/tools/pack200/

Reviewers: 麦庶, 三红

Reviewed By: 麦庶, 三红

Differential Revision: https://aone.alibaba-inc.com/code/D856287

Summary:
port jwarmup to dragonwell 8u
ref T19299187

Test Plan: see hotspot part

Reviewers: 三红, yumin.qi

Reviewed By: 三红, yumin.qi

Subscribers: 麦庶

Differential Revision: https://aone.alibaba-inc.com/code/D852150

Summary:
Backport of JFR(jdk part) to dragonwell based on JFR preview version(JDK11).
Link:
http://cr.openjdk.java.net/~mgronlun/JEP328_FlightRecorder/Preview/webrev/index.html

Test Plan: test/jdk/jfr/

Reviewers: 卓昂, 传胜, 麦庶, yumin.qi, 三红, 芳玺

Reviewed By: 三红, 芳玺, 卓昂, yumin.qi

Differential Revision: https://aone.alibaba-inc.com/code/D818249

Summary: add distro name and version in java version string

Reviewers: 传胜

Subscribers: 麦庶

Differential Revision: https://aone.alibaba-inc.com/code/D796935

8215982: (tz) Upgrade time-zone data to tzdata2018i
8225580: tzdata2018i integration causes test failures on jdk-13
Reviewed-by: andrew, naoto

Reviewed-by: rriggs, naoto

Reviewed-by: naoto

Reviewed-by: naoto

Reviewed-by: naoto
Contributed-by: nishit.jain@oracle.com

Reviewed-by: naoto, rriggs, tbell, phh
Contributed-by: nishit.jain@oracle.com

Reviewed-by: vinnie

Reviewed-by: andrew

Summary: Compile fdlibm with -O3 and relevant C flags on gcc arches.
Reviewed-by: mbaesken, andrew

Summary: Also brings in some cleanups from JDK-8048123
Reviewed-by: rriggs, chegar, phh, clanger, aph

Reviewed-by: rriggs, chegar

Reviewed-by: erikj, dholmes

Reviewed-by: naoto, andrew
Contributed-by: deepak.kejriwal@oracle.com

Reviewed-by: serb, erikj

8207152: Placeholder for Japanese new era should be two characters
8211398: Square character support for the Japanese new era
8180469: Wrong short form text for supplemental Japanese era
8206120: Add test cases for lenient Japanese era parsing
8218915: Change isJavaIdentifierStart and isJavaIdentifierPart to handle new code points
8217710: Add 5 currency code points to Java SE 8uX
Reviewed-by: coffeys, naoto
Contributed-by: deepak.kejriwal@oracle.com

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

Summary: Create separate launchers for clhsdb and hsdb since JDK 8 uses separate launchers for SA tools
Reviewed-by: kevinw, andrew

Reviewed-by: martin, naoto

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

Reviewed-by: tbell, erikj

Reviewed-by: prr, ssadetsky

Reviewed-by: chegar, dfuchs, mschoene, igerasim

Reviewed-by: coffeys

Summary: The AWT Robot X11 code that takes screenshots uses the default root window, which may not contain the final composited desktop.
Reviewed-by: alexsch, ssadetsky, prr, dbuck

Reviewed-by: erikj

Reviewed-by: martin, naoto

Reviewed-by: martin, naoto

Reviewed-by: erikj, ihse, ddehaven, billyh

Reviewed-by: naoto

Reviewed-by: naoto

Summary: Fixes build failures on some sustems with custom LDFLAGS settings.
Reviewed-by: erikj, ihse

Reviewed-by: prr, serb

Reviewed-by: naoto

Reviewed-by: billyh, aefimov, erikj, rhalade