RFR: 8271870: G1: Add objArray splitting when scanning object with evacuation failure [v2]

[Ivan Walulya]

On Thu, 3 Apr 2025 11:33:45 GMT, Thomas Schatzl <tschatzl at openjdk.org> wrote:

>> Hi all,
>> 
>>   please review this change that makes the object iteration path for evacuation failed objects the same as the one for regular objects (and indeed make both use the same code).
>> 
>> This has been made possible with the refactoring of object array task queues.
>> 
>> At the same time this also covers [JDK-8271871](https://bugs.openjdk.org/browse/JDK-8271871).
>> 
>> Testing: tier1-5, some perf testing with no differences
>> 
>> Thanks,
>>   Thomas
>
> Thomas Schatzl has updated the pull request incrementally with one additional commit since the last revision:
> 
>   * some additional assert to make sure the scanner is initialized correctly.

LGTM!

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Marked as reviewed by iwalulya (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/24222#pullrequestreview-2739853788