RFR: 8364182: Add jcmd VM.security_properties command [v11]

[Sean Coffey]

On Fri, 20 Feb 2026 09:45:38 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:
> 
>   update test to jtreg, indent changes

test/hotspot/jtreg/serviceability/dcmd/vm/SecurityPropertiesTest.java line 34:

> 32: /*
> 33:  * @test
> 34:  * @bug 8376134

should be 8364182

-------------

PR Review Comment: https://git.openjdk.org/jdk/pull/29124#discussion_r2832664575