On Thu, 7 May 2026 16:16:18 GMT, Markus Grönlund <[email protected]> wrote:

>> I don't have any other comments, thanks for taking this on.
>
>> I don't have any other comments, thanks for taking this on.
> 
> Many thanks for reviewing this, @AlanBateman. Cheers.

> @mgronlun how important `jdk.jfr.internal.JVM::getClassId`?
> 
> While looking on external addresses referenced in C2 intrinsics we noticed 
> that JFR's `getClassId` is not generated:
> 
> ```
> 1214  456    b    4       jdk.jfr.jvm.TestJFRIntrinsic::getClassIdIntrinsic 
> (22 bytes)
>                               @ 1   jdk.jfr.internal.JVM::getClassId (0 
> bytes)   failed to inline: native method
> ```
> 
> `_getClassId` is missing in LibraryCallKit::try_to_inline() and 
> C2Compiler::is_intrinsic_supported(). Even so we have 
> `LibraryCallKit::inline_native_classID()`.

Hi @vnkozlov , it was removed as part of:

[8284161: Implementation of Virtual Threads 
(Preview)](https://bugs.openjdk.org/browse/JDK-8284161)

Now, if I can only remember why that was the case...

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

PR Comment: https://git.openjdk.org/jdk/pull/30922#issuecomment-4409279858

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