RFR: 8361842: Validate input in both Java and C++ for java.lang.StringCoding intrinsics

[Volkan Yazici]

On Fri, 4 Jul 2025 15:03:33 GMT, Volkan Yazici <vyazici at openjdk.org> wrote:

>> Maybe use `jdk.internal.util.Preconditions` directly instead?
>> Suggestion:
>> 
>>         Preconditions.checkFromIndexSize(off, len, ba.length, null);
>
> @ExE-Boss, I consulted this internally and decided to stick to using public APIs, unless there is a reason not to do so. In short, given `Objects::checkFromIndexSize` directly delegates to `Preconditions::checkFromIndexSize`, I expect that C2 will do its magic. Note my remark above that, prior to promoting this draft to a PR, a comprehensive benchmark suite run will be performed when all intrinsics of concern are addressed.

Doh! I've just noticed `Objects::checkFromIndexSize` throws `IndexOutOfBoundsException`, though we need `ArrayIndexOutOfBoundsException`. `Objects::checkFromIndexSize` doesn't accept an exception supplier, replacing it with `Preconditions::checkFromIndexSize`.

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PR Review Comment: https://git.openjdk.org/jdk/pull/25998#discussion_r2185930404