RFR: 8369564: Provide a MemorySegment API to read strings with known lengths [v8]

[Liam Miller-Cushon]

On Thu, 20 Nov 2025 15:55:30 GMT, Jorn Vernee <jvernee at openjdk.org> wrote:

>> src/java.base/share/classes/jdk/internal/foreign/StringSupport.java line 68:
>> 
>>> 66:     @ForceInline
>>> 67:     public static String readBytes(AbstractMemorySegmentImpl segment, long offset, Charset charset, long length) {
>>> 68:         final int lengthBytes = (int) length;
>> 
>> I think we should do something more here than just ignore the upper bits. We probably need to throw an exception when the value is > Integer.MAX_VALUE
>
> Looks like we are already specified to throw IAE if 'the size of the string is greater than the largest string supported by the platform'

Done, and I added a test to cover the IAE

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PR Review Comment: https://git.openjdk.org/jdk/pull/28043#discussion_r2549317693