RFR: 8337217: Port VirtualMemoryTracker to use VMATree [v32]

[Johan Sjölen]

On Mon, 24 Feb 2025 17:48:07 GMT, Gerard Ziemski <gziemski at openjdk.org> wrote:

>> Done.
>
> 2 questions:
> 
> 1st, I must be misunderstanding something here. Johan asked to change the API from:
> 
> `visit_committed_regions(ReservedMemoryRegion& committed_rgn)`
> 
> to
> 
> `visit_committed_regions(position start, size size)`
> 
> but I still see the old way.
> 
> 2nd, why are we asking for this change?

We want to remove `ReservedMemoryRegion` in a follow up PR to this one. Another step is to remove the `CommittedMemoryRegion` class as well.

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PR Review Comment: https://git.openjdk.org/jdk/pull/20425#discussion_r1973584029