RFR: Enhancements for Shenandoah's generational mode [v6]

[William Kemper]

On Thu, 30 Mar 2023 10:21:55 GMT, Aleksey Shipilev <shade at openjdk.org> wrote:

>> William Kemper has updated the pull request incrementally with 51 additional commits since the last revision:
>> 
>>  - Fix comment formatting
>>  - Update copyrights
>>  - WIP: Fix issues for live mode
>>  - WIP: Use a fixed size buffer for events
>>  - Show initial logFile argument in toolbar
>>  - Do not load log files on event loop thread
>>  - Factor visualizer frame setup out of main function
>>  - Fix weird 3-space indentation
>>  - Layout improvements
>>  - WIP: Fix warnings
>>  - ... and 41 more: https://git.openjdk.org/shenandoah-visualizer/compare/dadfaff6...06abcd90
>
> src/main/java/org/openjdk/shenandoah/CircularBuffer.java line 79:
> 
>> 77: 
>> 78:     public int size() {
>> 79:         return Math.min(count, elements.length);
> 
> Why not just `return count`?

The code uses `count` to detect when the write index has wrapped (count itself does not wrap). This is mostly to support counted loop iteration.

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PR Review Comment: https://git.openjdk.org/shenandoah-visualizer/pull/1#discussion_r1153837878