RFR: 8198540: Dynalink leaks memory when generating type converters [v7]

[Attila Szegedi]

On Fri, 8 Jan 2021 18:58:03 GMT, Peter Levart <plevart at openjdk.org> wrote:

>> So, are you saying the solution where I kept the fields volatile and initialized them with `Map.of()` is safe? If so, that'd be good news; I'm inclined these days to write as much null-free code as possible :-)
>
> Yes, the pre-initialized fields to Map.of() are safe regardless of whether they are volatile or not (so I would keep them non-volatile to optimize fast-path). Because the BiClassValues instance is published safely to other threads via ClassValue and because you never assign null to the fields later on.

Alright, I made a new hybrid of non-volatile fields and never null fields. Hopefully we're getting to the ideal. Again, I really appreciate all the advice and direction you provided here.

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PR: https://git.openjdk.java.net/jdk/pull/1918