RFR: 8376269: Mixed jstack cannot find function in vDSO [v3]

[Yasumasa Suenaga]

On Thu, 29 Jan 2026 03:39:18 GMT, Chris Plummer <cjplummer at openjdk.org> wrote:

>> Yasumasa Suenaga has updated the pull request incrementally with three additional commits since the last revision:
>> 
>>  - Add new function to handle vDSO
>>  - Remove unneeded change
>>  - Remove 32 bit support
>
> This PR needs a test so I would not suggest dropping TestJhsdbJstackMixedWithVDSOCallCore.java. Regarding our CI, we aren't seeing failures with serviceability/sa/TestJhsdbJstackMixedCore.java, but then our CI does not cover Alpine Linux or Fedora. However, others do test these platforms and likely would not want to see another test failure introduced. I would suggest resolving [JDK-8376284](https://bugs.openjdk.org/browse/JDK-8376284) and apply the same fix here to TestJhsdbJstackMixedWithVDSOCallCore.java.

@plummercj @kevinjwalls 
Thanks a lot for your review! I got your review, but I updated testcase to skip if it runs on musl libc. It will fail due to same reason (cannot unwind musl libc library) which reported in [JDK-8376284](https://bugs.openjdk.org/browse/JDK-8376284).

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PR Comment: https://git.openjdk.org/jdk/pull/29400#issuecomment-3854112242