On Thu, 8 May 2025 11:22:30 GMT, Alan Bateman <[email protected]> wrote:
> Implementation changes for [JEP 500: Prepare to Make Final Mean > Final](https://openjdk.org/jeps/500). > > Field.set (and Lookup.unreflectSetter) are changed to allow/warn/debug/deny > when mutating a final instance field. JFR event recorded if final field > mutated. Spec updates to Field.set, Field.setAccessible and Module.addOpens > to align with the proposal in the JEP. > > HotSpot is updated to add support for the new command line options. To aid > diagnosability, -Xcheck:jni reports a warning and -Xlog:jni=debug logs a > message to help identity JNI code that mutates finals. For now, JNI code is > allowed to set the "write-protected" fields System.in/out/err without a > warning, we can re-visit once we change the System.setIn/setOut/setErr > methods to not use JNI (I prefer to keep this separate to this PR because > there is a small startup regression to address when changing System.setXXX). > > There are many new tests. A small number of existing tests are changed to run > /othervm as reflectively opening a package isn't sufficient. Changing the > tests to /othervm means that jtreg will launch the agent with the command > line options to open the package. > > Testing: tier1-6 This pull request has now been integrated. Changeset: 26460b6f Author: Alan Bateman <[email protected]> URL: https://git.openjdk.org/jdk/commit/26460b6f12ce0763b79acfd98fca260b509a82c5 Stats: 5365 lines in 76 files changed: 5170 ins; 55 del; 140 mod 8353835: Implement JEP 500: Prepare to Make Final Mean Final Reviewed-by: liach, vlivanov, dholmes, vyazici ------------- PR: https://git.openjdk.org/jdk/pull/25115
