Support Java 11

[andre15silva]

Currently Java >8 support is limited due to the tools.jar dependency.

It would be important to fix these compatibility issues as Nopol's usage in https://github.com/eclipse/repairnator will be limited when it moves to Java 11.

[monperrus]

Per the discussion in Repairnator, the blocking factor is the need of JDI for Dynamoth.

As solution, we will likely move on to Java 11 by only keeping the SMT-based synthesis (the one described in the TSE paper). The users of Dynamoth would then use a past commit.

[monperrus]

The question is: where is com.sun.jdi in Java 11? by default in the JVM? Somewhere else?

[andre15silva]

The change was made in https://openjdk.java.net/jeps/220

Removed: rt.jar and tools.jar

The class and resource files previously stored in lib/rt.jar, lib/tools.jar, lib/dt.jar, and various other internal JAR files are now stored in a more efficient format in implementation-specific files in the lib directory. The format of these files is not specified and is subject to change without notice.

I have to dig more into it, but it's still in jdk11 https://docs.oracle.com/en/java/javase/11/docs/api/jdk.jdi/com/sun/jdi/package-summary.html

[monperrus]

Does it mean that it is available by default (no need to add another jar as before)?

[andre15silva]

Does it mean that it is available by default (no need to add another jar as before)?

I think so. There are probably changes in the behaviour/API that impact Nopol, so I have to experiment to be sure it's that straightforward.

[monperrus]

have to experiment to be sure it's that straightforward.

great, looking forward to the results

[monperrus]

FTR, @Twonki @martinezmatias the tools.jar problem is fixed, see #214 (comment) thanks @andre15silva

GZoltar is the remaining problem. André, we have an ongoing effort to replace Gzoltar, by a new project called flacoco, see eclipse-repairnator/repairnator#1029 We may soon give Flacoco a high priority.

[monperrus]

FYI @gynther-k is able to use GZoltar with Java 11, with the latest version as of commit gynther-k/TBar@d1b1555

[andre15silva]

FYI @gynther-k is able to use GZoltar with Java 11, with the latest version as of commit gynther-k/TBar@d1b1555

I will take a look and update the PR

[gynther-k]

@monperrus @andre15silva
The modified Java11 .jar files is not used by default in my project but are located here: https://github.com/gynther-k/TBar/tree/test-1/lib/java11modified

I have made a PR to gzoltar with a more detailed description GZoltar/gzoltar#41 . I have no previous experience of gzoltar so please come with suggestions .

[monperrus]

Thanks for the PR!

[monperrus]

@martinezmatias @andre15silva FYI PR merged in GZoltar GZoltar/gzoltar#41

[andre15silva]

Nice. Thanks @gynther-k !