Currently JITTester only generates common, instance classes. This PR suggests a value classes support for the tool.
Specifically, it: - adds a ValueKlass and ValueKlassFactory to produce the necessary entities in the AST. - makes sure that we don't generate mutable fields in the value classes - blocks synchronized usage on value-class methods - value classes get increased probability to be abstract - to check deeper hierarchies. - adds a parameter governing the balance between instance and value classes. --------- - [x] I confirm that I make this contribution in accordance with the [OpenJDK Interim AI Policy](https://openjdk.org/legal/ai). ------------- Commit messages: - 8382603: [lworld] [jittester] Add Value Classes support in generated tests Changes: https://git.openjdk.org/valhalla/pull/2346/files Webrev: https://webrevs.openjdk.org/?repo=valhalla&pr=2346&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8382603 Stats: 881 lines in 15 files changed: 626 ins; 212 del; 43 mod Patch: https://git.openjdk.org/valhalla/pull/2346.diff Fetch: git fetch https://git.openjdk.org/valhalla.git pull/2346/head:pull/2346 PR: https://git.openjdk.org/valhalla/pull/2346
