RFR: 8330027: Identity hashes of archived objects must be based on a reproducible random seed [v5]

[Thomas Stuefe]

> CDS archive contains archived objects with identity hashes.
> 
> These hashes are deliberately preserved or even generated during dumping. They are generated based on a seed that is initialized randomly on a per-thread basis. These generations precede CDS dump initialization, so they are not affected by the init_random call there, nor would they be affected by [JDK-8323900](https://bugs.openjdk.org/browse/JDK-8323900).
> 
> A random seed will not work for dumping archives since it prevents reproducible archive generation. Therefore, when dumping, these seeds must be initiated in a reproducible way.

Thomas Stuefe has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains one commit:

  JDK-8330027-cds-ihash-reproducability.patch

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Changes: https://git.openjdk.org/jdk/pull/18735/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=18735&range=04
  Stats: 35 lines in 4 files changed: 24 ins; 8 del; 3 mod
  Patch: https://git.openjdk.org/jdk/pull/18735.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/18735/head:pull/18735

PR: https://git.openjdk.org/jdk/pull/18735