RFR(S): 8205615: Start of release updates for JDK 12 / 8205619: Bump maximum recognized class file version to 56 for JDK 12

[Mikael Vidstedt]

All,

Shamelessly stealing the background/intro from Joe’s email to build-dev[1] earlier today:

With the JDK 11 and 12 split fast approaching [1], it is time to work on the various start of release update tasks for JDK 12. Those tasks are being tracked under the umbrella bug JDK-8205615: "Start of release updates for JDK 12".

This thread is to review the hotspot-related portions of the work including JDK-8205619: "Bump maximum recognized class file version to 56 for JDK 12”.

Bug: https://bugs.openjdk.java.net/browse/JDK-8205619
CSR: https://bugs.openjdk.java.net/browse/JDK-8205642
Webrev: http://cr.openjdk.java.net/~darcy/8205615.4/ <http://cr.openjdk.java.net/~darcy/8205615.4/>


Of specific interest for hotspot are the following files:


* src/hotspot/share/classfile/classFileParser.cpp

Added a JAVA_12_VERSION definition which is, for now, unused.


* src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.replacements/src/org/graalvm/compiler/replacements/classfile/Classfile.java

Bumped the maximum recognized version. Doug has promised to help upstream this to Graal.


* test/hotspot/jtreg/runtime/CommandLine/VMDeprecatedOptions.java

Removed verification of the previously deprecated, now obsolete, VM flags.


* test/jdk/com/sun/management/HotSpotDiagnosticMXBean/CheckOrigin.java

Removed the use of the previously deprecated, now obsolete, PrintSafepointStatistics flag.


Testing:

The webrev as a whole has been tested using tier1-3. There are no hotspot related failures.

Cheers,
Mikael

[1] http://mail.openjdk.java.net/pipermail/build-dev/2018-June/022528.html
[2] http://mail.openjdk.java.net/pipermail/jdk-dev/2018-June/001462.html <http://mail.openjdk.java.net/pipermail/jdk-dev/2018-June/001462.html>