RFR: 8358537: (bf) JavaNioAccess::getBufferAddress bypasses direct buffer MemorySession state check

[Jorn Vernee]

On Tue, 3 Jun 2025 20:46:49 GMT, Brian Burkhalter <bpb at openjdk.org> wrote:

> Add package-scope `long java.nio.Buffer::address()` to simply return the value of the `address` instance variable; use this method in `JavaNioAccess::getBufferAddress`.

test/jdk/java/nio/channels/etc/MemorySegments.java line 61:

> 59:      */
> 60:     static Stream<Supplier<Arena>> arenaSuppliers() {
> 61:         return Stream.of(Arena::global, Arena::ofAuto, Arena::ofConfined);

Why is using a shared arena causing the UOE to be thrown? I'd think that would be triggered by the use of heap buffers, but shared arena is for off-heap memory.

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PR Review Comment: https://git.openjdk.org/jdk/pull/25631#discussion_r2124976750