RFR: 8362379: Test serviceability/HeapDump/UnmountedVThreadNativeMethodAtTop.java should mark as /native

[Serguei Spitsyn]

On Fri, 18 Jul 2025 08:46:59 GMT, SendaoYan <syan at openjdk.org> wrote:

> Hi all,
> 
>   Test serviceability/HeapDump/UnmountedVThreadNativeMethodAtTop.java call native libary 'UnmountedVThreadNativeMethodAtTop' with System.loadLibrary. If run this test without jtreg option '-nativepath', jtreg will report 'JUnit test failure'. After this PR, we add jtreg directive `/native` to test header, run this test without jtreg option '-nativepath', jtreg will report 'Error. Use -nativepath to specify the location of native code'. So add `/native` directive will make this test more friendly.
> 
> Change has been verified locally, test-fix only, no risk.

Looks good.

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

Marked as reviewed by sspitsyn (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/26384#pullrequestreview-3034228165