RFR: 8364182: Add jcmd VM.security_properties command [v10]

[Kevin Walls]

On Wed, 18 Feb 2026 17:55:54 GMT, Kieran Farrell <kfarrell at openjdk.org> wrote:

>> The goal of this PR is to add a means of exposing security properties at runtime to aid the debugging security related issues/misconfigurations etc. Currently, only initial security properties set at start up can be exposed via the `InitialSecurityProperty` JFR event. 
>> 
>> This patch introduces a new jcmd diagnostic command `VM.properties`, which enables developers to print either the current system properties or security properties of a running Java process via command-line arguments (-system or -security). To avoid clutter within the jcmd command list, the old `VM.system_properties` command is hidden, but not removed so will not break existing usages. The implementation of each is shared to reduce duplication.
>
> Kieran Farrell has updated the pull request incrementally with one additional commit since the last revision:
> 
>   newline

src/hotspot/share/services/diagnosticCommand.cpp line 344:

> 342:   InstanceKlass* ik = InstanceKlass::cast(k);
> 343:   if (ik->should_be_initialized()) {
> 344:       ik->initialize(THREAD);

These two space indents are hotspot C++style, we can't change them all to 4 space indents.  If you can revert the spaces, it will also make it clearer what the real changes are.

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PR Review Comment: https://git.openjdk.org/jdk/pull/29124#discussion_r2827284568