RFR: 8304393: Provide method to iterate over regions of humongous object in G1 [v4]

[Thomas Schatzl]

> Hi all,
> 
>   please review this refactoring that introduces a method to iterate over all regions of a humongous object and apply a function to it to decrease the five times code duplication.
> 
> Testing: gha
> 
> Thanks,
>   Thomas

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

  ayang review

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/13080/files
  - new: https://git.openjdk.org/jdk/pull/13080/files/0ffe355e..bd89cbc9

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=13080&range=03
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=13080&range=02-03

  Stats: 19 lines in 4 files changed: 0 ins; 10 del; 9 mod
  Patch: https://git.openjdk.org/jdk/pull/13080.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/13080/head:pull/13080

PR: https://git.openjdk.org/jdk/pull/13080