> 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 fatal error when a mutating a final > field with JNI, and -Xlog:jni=debug can help identity when JNI code mutates > finals. For now, JNI code is allowed to set the "write-protected" fields > System.in/out/err, 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
Alan Bateman has updated the pull request incrementally with one additional commit since the last revision: RemoveFields(duration) and filter internal frames ------------- Changes: - all: https://git.openjdk.org/jdk/pull/25115/files - new: https://git.openjdk.org/jdk/pull/25115/files/545557d9..0041ef4a Webrevs: - full: https://webrevs.openjdk.org/?repo=jdk&pr=25115&range=03 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=25115&range=02-03 Stats: 57 lines in 5 files changed: 46 ins; 4 del; 7 mod Patch: https://git.openjdk.org/jdk/pull/25115.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/25115/head:pull/25115 PR: https://git.openjdk.org/jdk/pull/25115
