[jdk25u] RFR: 8367953: JFR sampler threads does not appear in thread dump

[Aleksey Shipilev]

On Fri, 10 Oct 2025 14:07:13 GMT, Aleksey Shipilev <shade at openjdk.org> wrote:

> Fixes another minor bug in new JFR feature added in JDK 24/25.
> 
> Additional testing:
>  - [x] macos-aarch64-server-fastdebug, `jdk_jfr`

Push approval granted.

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PR Comment: https://git.openjdk.org/jdk25u/pull/291#issuecomment-3398093230