RFR: 8366474: Rename MetaspaceObj::is_shared() to MetaspaceObj::in_aot_cache()

[Vladimir Kozlov]

On Sat, 30 Aug 2025 02:13:20 GMT, Ioi Lam <iklam at openjdk.org> wrote:

> Rename `is_shared()` in `Metaspace` (and various other classes) to `in_aot_cache()` to reflect its true meaning:
> - tests if an object is inside the AOT cache's metaspace region.
> 
> Also various forms of  "shared metaspace" are updated to "aot metaspace"
> 
> Please start your review with allocations.hpp

Good. In few places you used `AOTMetaspace` in comments and messages. But I think it is fine. I assume you push this first.

test/hotspot/jtreg/runtime/cds/SpaceUtilizationCheck.java line 62:

> 60:         WhiteBox wb = WhiteBox.getWhiteBox();
> 61:         long reserve_alignment = wb.metaspaceSharedRegionAlignment();
> 62:         System.out.println("AOTMetaspace::core_region_alignment() = " + reserve_alignment);

Here too.

-------------

Marked as reviewed by kvn (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/27016#pullrequestreview-3171054693
PR Review Comment: https://git.openjdk.org/jdk/pull/27016#discussion_r2311956105