On Tue, 21 May 2024 07:26:17 GMT, Alan Bateman <al...@openjdk.org> wrote:
>> This is the implementation changes for JEP 471. >> >> The methods in sun.misc.Unsafe for on-heap and off-heap access are >> deprecated for removal. This means a removal warning at compile time. No >> methods have been removed. A deprecated message is added to each of the >> methods but unlikely to be seen as the JDK does not generate or publish the >> API docs for this class. >> >> A new command line option --sun-misc-unsafe-memory-access=$value is >> introduced to allow or deny access to these methods. The default proposed >> for JDK 23 is "allow" so no change in behavior compared to JDK 22 or >> previous releases. >> >> A new test is added to test the command line option settings. The existing >> micros for FFM that use Unsafe are updated to suppress the removal warning >> at compile time. A new micro is introduced with a small sample of methods to >> ensure the changes doesn't cause any perf regressions ([sample >> results](https://cr.openjdk.org/~alanb/8331670-results.txt)). >> >> For now, the changes include the update to the man page for the "java" >> command. It might be that this has to be separated out so that it goes with >> other updates in the release. > > Alan Bateman has updated the pull request with a new target base due to a > merge or a rebase. The pull request now contains 10 commits: > > - Merge > - Add removal to DISABLED_WARNINGS > Fail at startup if bad value specified to option > - Merge > - Update man page > - Update man page > - Fix comment > - Merge > - Merge > - Whitespace > - Initial commit src/jdk.unsupported/share/classes/sun/misc/Unsafe.java line 1750: > 1748: } > 1749: > 1750: // Instructure for --sun-misc-unsafe-memory-access=<value> command > line option. Suggestion: // Infrastructure for --sun-misc-unsafe-memory-access=<value> command line option. ------------- PR Review Comment: https://git.openjdk.org/jdk/pull/19174#discussion_r1613644783
