RFR: 8337217: Port VirtualMemoryTracker to use VMATree

[Afshin Zafari]

On Fri, 9 Aug 2024 09:05:37 GMT, Johan Sjölen <jsjolen at openjdk.org> wrote:

>> Done.
>> For my curiosity, what is the advantage?
>
> 1. No malloc
> 2. No indirection, so no cache misses
> 3. A clear lifetime and clear ownership, both are bound to the `RegionsTree` object

OK. Thanks for your description.

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PR Review Comment: https://git.openjdk.org/jdk/pull/20425#discussion_r1713371752