RFR: 8336284: Test TestClhsdbJstackLock.java/TestJhsdbJstackLock.java fails with -Xcomp after JDK-8335743

[SendaoYan]

On Fri, 12 Jul 2024 03:24:42 GMT, SendaoYan <syan at openjdk.org> wrote:

> Hi all,
> Test TestClhsdbJstackLock.java/TestJhsdbJstackLock.java fails with -Xcomp after [JDK-8335743](https://bugs.openjdk.org/browse/JDK-8335743). I think the new failures was testcase bug.
> 
> https://github.com/openjdk/jdk/blob/627a32d6722c92f814c1ddd1c2fdf9a3b28cd655/src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/runtime/JavaVFrame.java#L112
> Locals are not always available, e.g., compiled native frames have no scope so there are no locals. So the output `- waiting on <no object reference available>` also acceptable.
> 
> The change has been verified by -Xmixed/-Xcomp(c2)/-Xcomp -XX:TieredStopAtLevel=1(c1), only change the testcase, no risk.

> I just want to clarify that the "" message is coming from the SA JavaVFrame.java file, not the vframe.cpp code you mention in the PR description.

Thanks for the correction. The PR description has been updated.

Fix the testcase bug, I think it's not need the 2rd reviewer.

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PR Comment: https://git.openjdk.org/jdk/pull/20151#issuecomment-2224890815
PR Comment: https://git.openjdk.org/jdk/pull/20151#issuecomment-2224894273