RFR: 8323159: Consider adding some text re. memory zeroing in Arena::allocate [v5]

[Per Minborg]

On Sun, 28 Jan 2024 00:57:24 GMT, ExE Boss <duke at openjdk.org> wrote:

>> Per Minborg has updated the pull request incrementally with two additional commits since the last revision:
>> 
>>  - Update copyright year
>>  - Add test for zero-out
>
> test/jdk/java/foreign/TestScope.java line 150:
> 
>> 148:     }
>> 149: 
>> 150:     private static final MemorySegment ZEROED_MEMORY = MemorySegment.ofArray(new byte[8102]);
> 
> The nearest power of two is 8192 (2<sup>13</sup>):
> Suggestion:
> 
>     private static final MemorySegment ZEROED_MEMORY = MemorySegment.ofArray(new byte[8192]);

Good catch. This was a typo. However, the test works as intended and the PR is already integrated.

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PR Review Comment: https://git.openjdk.org/jdk/pull/17308#discussion_r1469525320