RFR: 8335217: Fix memory ordering in ClassLoaderData::ChunkedHandleList [v2]

[Zhengyu Gu]

> ClassLoaderData::ChunkedHandleList's head is installed via Atomic::release_store(). Therefore, readers need Atomic::Atomic::load_acquire() barrier to access its members safely.

Zhengyu Gu has updated the pull request incrementally with one additional commit since the last revision:

  stefank's comments

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Changes:
  - all: https://git.openjdk.org/jdk/pull/19919/files
  - new: https://git.openjdk.org/jdk/pull/19919/files/84a7d1cf..9b01ab0f

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=19919&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=19919&range=00-01

  Stats: 7 lines in 1 file changed: 2 ins; 0 del; 5 mod
  Patch: https://git.openjdk.org/jdk/pull/19919.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/19919/head:pull/19919

PR: https://git.openjdk.org/jdk/pull/19919