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

[Chris Plummer]

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/0db4f21ce22a5700d6d2a29efc1289c8231266bb/hotspot/src/share/vm/runtime/vframe.cpp#L185
> 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.

Marked as reviewed by cjplummer (Reviewer).

I just want to clarify that the "<no object reference available>" message is coming from the SA JavaVFrame.java file, not the vframe.cpp code you mention in the PR description.

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PR Review: https://git.openjdk.org/jdk/pull/20151#pullrequestreview-2173821723
PR Comment: https://git.openjdk.org/jdk/pull/20151#issuecomment-2224526136