RFR: 8335007: Inline OopMapCache table [v2]

[Thomas Stuefe]

> OopMapCache uses a (closed hashing) table. The table is C-heap allocated. OopMapCache itself is also C-heap allocated. Since table size is fixed, we can just inline the table to OopMapCache and save one unnecessary pointer-hop on lookup.

Thomas Stuefe has updated the pull request incrementally with one additional commit since the last revision:

  review feedback

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Changes:
  - all: https://git.openjdk.org/jdk/pull/19882/files
  - new: https://git.openjdk.org/jdk/pull/19882/files/bb427211..0bb70c06

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=19882&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=19882&range=00-01

  Stats: 11 lines in 2 files changed: 0 ins; 1 del; 10 mod
  Patch: https://git.openjdk.org/jdk/pull/19882.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/19882/head:pull/19882

PR: https://git.openjdk.org/jdk/pull/19882