RFR: 8316694: Implement relocation of nmethod within CodeCache [v38]

[Vladimir Kozlov]

On Mon, 21 Jul 2025 23:49:14 GMT, Chad Rakoczy <duke at openjdk.org> wrote:

>> You did not answered my question adout using `memcpy
>
> I had changed the implementation to use `memcpy()` instead but as @fisk pointed out in https://github.com/openjdk/jdk/pull/23573#issuecomment-2797120660 it was easier to accidentally copy a value unintentionally so I reverted that change
> 
>> > >  I'm worried about copying the nmethod epoch counters  
>> >
>> > We should clear them. If not, it is a bug.
>>
>> I'd like to change copying from opt-out to opt-in instead; that would make me feel more comfortable.

Okay. We may look later to optimize it.

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PR Review Comment: https://git.openjdk.org/jdk/pull/23573#discussion_r2220602281