Integrated: 8273152: Refactor CDS FileMapHeader loading code

[Yumin Qi]

On Thu, 30 Sep 2021 05:43:40 GMT, Yumin Qi <minqi at openjdk.org> wrote:

> Please review,
>   Refactor fundamental CDS FileMapHeader code for reliable reading of basic info from shared archive.
>   With the change, it makes it possible to read an archive generated by different version of hotspot. Also it is possible to automatically generate a CDS archive If the archive supplied is not readable or fails to pass the check.
> 
>   Tests: tier1-4
>    jtreg on sa.
> 
> Thanks
> Yumin

This pull request has now been integrated.

Changeset: 8de77634
Author:    Yumin Qi <minqi at openjdk.org>
URL:       https://git.openjdk.java.net/jdk/commit/8de77634c414cc348a6eb7b28fd6339befdb12d7
Stats:     566 lines in 11 files changed: 333 ins; 100 del; 133 mod

8273152: Refactor CDS FileMapHeader loading code

Reviewed-by: ccheung, iklam

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PR: https://git.openjdk.java.net/jdk/pull/5768