[jdk21u-dev] RFR: 8364235: Fix for JDK-8361447 breaks the alignment requirements for GuardedMemory [v2]

[Goetz Lindenmaier]

> I backport this for parity with 21.0.10-oracle.

Goetz Lindenmaier has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains three additional commits since the last revision:

 - Merge branch 'master' into goetz_backport_8364235
 - backport 078d0d4968e26bb7a15417f1c4e891869c69dc6c
 - backport f67e4354316dcec185eac66adec2395e20b62579

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

Changes:
  - all: https://git.openjdk.org/jdk21u-dev/pull/2180/files
  - new: https://git.openjdk.org/jdk21u-dev/pull/2180/files/bff6f55b..489ef4a3

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=2180&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=2180&range=00-01

  Stats: 3552 lines in 170 files changed: 1878 ins; 1284 del; 390 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/2180.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/2180/head:pull/2180

PR: https://git.openjdk.org/jdk21u-dev/pull/2180