RFR: 8315131: Clarify VarHandle set/get access on 32-bit platforms

Thu Jul 10 23:45:14 UTC 2025

On 32 bit platforms, when an access to long/double is aligned, it is supported but not atomic. The original wording in `MethodHandles::byteBufferViewVarHandle` sounds as if it is not supported at all. We can fix that by borrowing the improved specification from `MemoryLayout::varHandle`.

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Commit messages:
 - 8315131: Clarify VarHandle set/get access on 32-bit platforms

Changes: https://git.openjdk.org/jdk/pull/26258/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=26258&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8315131
  Stats: 4 lines in 1 file changed: 1 ins; 0 del; 3 mod
  Patch: https://git.openjdk.org/jdk/pull/26258.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/26258/head:pull/26258

PR: https://git.openjdk.org/jdk/pull/26258