RFR: 8344149: Remove usage of Security Manager from java.rmi

[Stuart Marks]

On Mon, 18 Nov 2024 17:39:44 GMT, Aleksei Efimov <aefimov at openjdk.org> wrote:

>> First cut at removal of Security Manager stuff from RMI.
>> 
>> This covers just about every SM-related case in RMI, except for a bit of package checking in MarshalInputStream. This will be handled separately. It's covered by [JDK-8344329](https://bugs.openjdk.org/browse/JDK-8344329).
>> 
>> Further simplifications could be done in RuntimeUtil and NewThreadAction. However, those changes started to become somewhat more intrusive than I'd like for this PR, which is focused on removing security-related stuff.
>
> src/java.rmi/share/classes/sun/rmi/runtime/NewThreadAction.java line 65:
> 
>> 63:     /**
>> 64:      * special child of the system thread group for running tasks that
>> 65:      * may execute user code, so that the security policy for threads in
> 
> Do we still want to mention `security policy` here?

Yeah, I should probably edit that. I don't want to change the thread group behavior, so the justification for the thread group might mention the (historical) effect on security policy.

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PR Review Comment: https://git.openjdk.org/jdk/pull/22129#discussion_r1847310716