On Mon, 28 Mar 2022 18:09:29 GMT, Jim Laskey <jlas...@openjdk.org> wrote:

>> We propose to provide a runtime anonymous carrier class object generator; 
>> java.lang.runtime.Carrier. This generator class is designed to share 
>> anonymous classes when shapes are similar. For example, if several clients 
>> require objects containing two integer fields, then Carrier will ensure that 
>> each client generates carrier objects using the same underlying anonymous 
>> class. 
>> 
>> See JBS for details.
>
> Jim Laskey has updated the pull request incrementally with one additional 
> commit since the last revision:
> 
>   Clean up @return

src/java.base/share/classes/java/lang/runtime/Carrier.java line 330:

> 328:              * Constructor.
> 329:              *
> 330:              * @param primitiveCount  slot count required for primitives

This isn’t the slot count, but the `long[]` array length, which is half the 
slot count for `long`s.

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PR: https://git.openjdk.java.net/jdk/pull/7744

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