RFR: 8376284: New test serviceability/sa/TestJhsdbJstackMixedCore.java from JDK-8374482 fails on Linux Alpine [v4]

[Matthias Baesken]

On Tue, 3 Feb 2026 00:29:16 GMT, Yasumasa Suenaga <ysuenaga at openjdk.org> wrote:

>> TestJhsdbJstackMixedCore.java introduced in [JDK-8374482](https://bugs.openjdk.org/browse/JDK-8374482) failed on Alpine because musl-c does not provide the symbol of signal trampoline (`__restore_rt` on Linux Kernel for AMD64) as following:
>> 
>> 
>> java.lang.RuntimeException: '<signal handler called>' missing from stdout/stderr
>> at jdk.test.lib.process.OutputAnalyzer.shouldContain(OutputAnalyzer.java:253)
>> at TestJhsdbJstackMixedCore.runJstackMixed(TestJhsdbJstackMixedCore.java:62)
>> at TestJhsdbJstackMixedCore.main(TestJhsdbJstackMixedCore.java:74)
>> at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:104)
>> at java.base/java.lang.reflect.Method.invoke(Method.java:565)
>> at com.sun.javatest.regtest.agent.MainActionHelper$AgentVMRunnable.run(MainActionHelper.java:335)
>> at java.base/java.lang.Thread.run(Thread.java:1516)
>> 
>> 
>> It would success if debuginfo is installed, but it should be skipped if the symbol is not available.
>> See JBS for details.
>
> Yasumasa Suenaga has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Update the symbol for signal trampoline

Marked as reviewed by mbaesken (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/29480#pullrequestreview-3743787665