RFR: 8366457: Add ResourceArea and Arena allocators for the RBTree

[Casper Norrbin]

On Mon, 12 Jan 2026 14:34:23 GMT, Johan Sjölen <jsjolen at openjdk.org> wrote:

>> src/hotspot/share/utilities/rbTree.hpp line 35:
>> 
>>> 33: #include "nmt/memTag.hpp"
>>> 34: #include "runtime/os.hpp"
>>> 35: #include "runtime/thread.hpp"
>> 
>> Do we need to include `allocation.hpp` and `thread.hpp`? I can't find what's using these and it builds fine for me with those includes removed.
>
> We need `allocation.hpp` as that provides AllocFailStrategy, etc. `thread.hpp` isn't needed, that was unfortunate left overs from my first draft.

Ah ok! Interesting that it worked before as `RBTreeCHeap` also uses `AllocFailStrategy`.

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PR Review Comment: https://git.openjdk.org/jdk/pull/29082#discussion_r2686309353