[foreign-memaccess+abi] RFR: 8313238: Improve the performance of strlen for null-terminated strings [v3]

[Per Minborg]

On Mon, 7 Aug 2023 10:58:05 GMT, Per Minborg <pminborg at openjdk.org> wrote:

>> src/java.base/share/classes/jdk/internal/foreign/StringSupport.java line 123:
>> 
>>> 121:                 segment = segment.asSlice(start);
>>> 122:             }
>>> 123:             long len = segment.byteSize() < MAX_TRIVIAL_SIZE
>> 
>> When calling `strlen` should it be considered if segments is heap or off-heap?
>
> The linker can call native methods where the segment is heap-based too.

Or, no. You are right. We have to handle this separately.

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PR Review Comment: https://git.openjdk.org/panama-foreign/pull/857#discussion_r1285723294