RFR: 8371637: allocateNativeInternal sometimes return incorrectly aligned memory

[Kurt Miller]

On Wed, 12 Nov 2025 12:15:56 GMT, Harald Eilertsen <haraldei at openjdk.org> wrote:

> > Would it make sense to add `OperatingSystem.BSD` to consolidate any such predicates?
> 
> I think so, but for this case we would also need `OperatingSystem.FreeBSD`, as I am uncerain if OpenBSD has the same issue. (NetBSD seems to also use jemalloc, and should behave like FreeBSD, though.)

OpenBSD's malloc smallest arena is 16 bytes so it matches the current assumption `MAX_MALLOC_ALIGN` makes and does not exhibit a problem with the tests.

-------------

PR Comment: https://git.openjdk.org/jdk/pull/28235#issuecomment-3522593168