RFR: 8357828: Add a timestamp to jcmd diagnostic commands

[Laurence Cable]

On 9/25/25 12:00 AM, Alan Bateman wrote:
> On Wed, 24 Sep 2025 09:09:22 GMT, Ivan Bereziuk <duke at openjdk.org> wrote:
>
>> Do you think we would need a CSR for this kind of change?
> The output from several commands have changed over many releases/years, the output from Thread.dump in particular. AFAIK, none of these changes has a CSR, there were only CSRs when new commands were added. That said, if there is some evidence that the output is being parsed then there is a compatibility concern so creating a CSR and RN would prudent.

I am personally aware of at least one cloud svc that parses jcmd o/p 
that may be affected by such a change

>
> -------------
>
> PR Comment: https://git.openjdk.org/jdk/pull/27368#issuecomment-3332451741