RFR: 8224509: Incorrect alignment in CDS related allocation code on 32-bit platforms [v2]

[Thomas Stuefe]

On Fri, 2 Oct 2020 16:20:00 GMT, Calvin Cheung <ccheung at openjdk.org> wrote:

>> CDS aligns pointers and sizes to BytesPerWord. On 64-bit, BytesPerWord = 8. On 32-bit, BytesPerWord = 4.
>> 
>> To make the alignment consistent between 64- and 32-bit platforms, this patch changes the alignment value to 8.
>> 
>> Testing: tiers 1 - 4
>>                built linux-x86-debug.
>
> Calvin Cheung 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' of github.com:calvinccheung/jdk into 8224509
>  - set SharedSpaceObjectAlignment to KlassAlignmentInBytes
>  - 8224509 (initial commit)

Marked as reviewed by stuefe (Reviewer).

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PR: https://git.openjdk.java.net/jdk/pull/476