RFR: 8331398: G1: HRPrinter reclamation events should print the original region type [v3]

[Albert Mingkun Yang]

On Thu, 23 May 2024 11:42:28 GMT, Thomas Schatzl <tschatzl at openjdk.org> wrote:

>> Hi all,
>> 
>>    currently, the various reclamation events always print `FREE` as the region type in the event string because the methods are always called after freeing.
>> 
>> This is kind of useless information (obviously reclaimed regions are `FREE` after reclaiming), so this CR suggests to use the original type to understand what region has been reclaimed.
>> 
>> It helped at least me a bit when debugging crashes after some refinement changes.
>> 
>> This is based on PR#19013, so please have a look at it as well.
>> 
>> Testing: local compilation, local testing
>> 
>> Thanks,
>>   Thomas
>
> Thomas Schatzl has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains four commits:
> 
>  - Merge fixes
>  - Merge branch 'master' into 8331398-hrprinter-print-original-region-type
>  - 8331398
>    
>       Currently, the various reclamation events always print FREE as the region type in the event string because the methods are always called after freeing.
>    
>    This is kind of useless information (obviously reclaimed regions are FREE after reclaiming), so this CR suggests to use the original type to understand what region has been reclaimed.
>    
>    Testing: local compilation, local testing
>    
>    Thanks,
>      Thomas
>  - 8331392
>    
>    Use different descriptions for different reclamation reasons

Marked as reviewed by ayang (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/19017#pullrequestreview-2073715384