RFR: 8211238: @Deprecated JFR event [v16]

[Markus Grönlund]

On Tue, 5 Dec 2023 17:43:41 GMT, Jaroslav Bachorik <jbachorik at openjdk.org> wrote:

>> Markus Grönlund has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   update event description
>
> src/hotspot/share/jfr/support/jfrNativeLibraryLoadEvent.cpp line 37:
> 
>> 35:   if (_start_time != nullptr) {
>> 36:     delete _start_time;
>> 37:   }
> 
> This should not be necessary. Delete should not fail on `nullptr`.

start_time is a JfrCHeapObj, which is an allocator that hooks allocations and deallocations. With a direct delete, it will account for the size of the object even though its null. It should probably be fixed in the allocator, but I needed this to get the accounting back on track.

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PR Review Comment: https://git.openjdk.org/jdk/pull/16931#discussion_r1416064517