RFR: 8374382: (aio) AsynchronousFileChannel writes wrong content using heap ByteBuffer when position != 0

[Jaikiran Pai]

On Wed, 31 Dec 2025 07:08:40 GMT, Alan Bateman <alanb at openjdk.org> wrote:

> On Windows only, if AsynchronousFileChannel is used with a heap ByteBuffer with a non-0 buffer position then the AsynchronousFileChannel read/write methods don't work correctly when the buffer is "substituted" for the underlying I/O operation.
> 
> This is a regression in JDK 26 after JDK-8357847, missed as we didn't have tests that exercise this scenario.

This looks good to me.

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Marked as reviewed by jpai (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/29010#pullrequestreview-3621058146