On Thu, 10 Sep 2026 13:08:11 GMT, Kieran Farrell <[email protected]> wrote:

>> This patch adds a new jcmd diagnostic command, `VM.show_settings`, to make 
>> the existing -`XshowSettings` output available from a running VM. The 
>> command accepts the same sections as`XshowSettings` (all, vm, properties, 
>> locale, security, system, security:all, security:properties, 
>> security:providers, security:tls). 
>> 
>> HotSpot registers the new diagnostic command, validates the requested 
>> section, then calls into `sun.launcher.LauncherHelper` to reuse the existing 
>> show settings formatting and return the result as bytes for the jcmd stream. 
>> The VM settings path also passes hotspots `InitialHeapSize`, `MaxHeapSize`, 
>> and Java thread stack size into the Java helper. A new jcmd test covers VM, 
>> properties, security TLS, and invalid-input output.
>> 
>> ---------
>> - [x] I confirm that I make this contribution in accordance with the 
>> [OpenJDK Interim AI Policy](https://openjdk.org/legal/ai).
>
> Kieran Farrell has updated the pull request with a new target base due to a 
> merge or a rebase. The pull request now contains 12 commits:
> 
>  - Merge master
>  - refactor
>  - split to internal method
>  - revert mistaken change
>  - add comment and update print_properties to use CHECK
>  - remove validation
>  - extend test coverage and code clean up
>  - updates
>  - clean up and add test
>  - synthax alignmnet
>  - ... and 2 more: https://git.openjdk.org/jdk/compare/010428f5...f29804f0

Would it be possible to get a hotspot and core-libs review on this? CSR review 
also required.

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PR Comment: https://git.openjdk.org/jdk/pull/31742#issuecomment-5619192423

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