On Sat, 28 Mar 2026 02:24:14 GMT, Yasumasa Suenaga <[email protected]> wrote:

> On the review for [JDK-8380955](https://bugs.openjdk.org/browse/JDK-8380955) 
> (#30443), `Linker` and `FunctionDescriptor` do not need to be value based 
> class because they would not be treated as "value".
> `Linker` is defined as providing a way to look up the canonical layouts 
> associated with the data types used by the ABI. `FunctionDescriptor` 
> represents the signature of a foreign function. They are not "value".
> 
> Actually they and their child (final) classes do not have `@ValueBased`, thus 
> `javac` and `-XX:DiagnoseSyncOnValueBasedClasses` cannot identify if they are 
> used in anti-pattern of value based class. Thus this change does not change 
> behavior, just documentation updates.

Can someone review this?
I'm still thinking this change is reasonable. I want to apply this into JDK 27, 
so I think we have to reach the conclusion within a month because RDP 1 is 
approaching. Comments are welcome.

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PR Comment: https://git.openjdk.org/jdk/pull/30481#issuecomment-4384524290

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