RFR: 8376284: New test serviceability/sa/TestJhsdbJstackMixedCore.java from JDK-8374482 fails on Linux Alpine [v3]

[Chris Plummer]

On Mon, 2 Feb 2026 19:11:41 GMT, Chris Plummer <cjplummer at openjdk.org> wrote:

>> Yasumasa Suenaga has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Clarify comments regarding debuginfo retrieval
>
> test/hotspot/jtreg/serviceability/sa/TestJhsdbJstackMixedCore.java line 72:
> 
>> 70:         var libc = SATestUtils.getLibCPath();
>> 71:         if (!SATestUtils.isSymbolAvailable(libc, "__restore_rt")) {
>> 72:             throw new SkippedException("Signal trampoline (__restore_rt) not found in libc.");
> 
> I think you should clarify with a comment here that the presence of the __restore_rt trampoline is what triggers SA to generate the frame with the name "`<signal handler called>`", and if the __restore_rt symbol does not exist, then SA will not know to call the frame  "`<signal handler called>`".

...and maybe SA should generate the frame as "__restore_rt <signal handler called\>" or "__restore_rt <signal handler trampoline\>".

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PR Review Comment: https://git.openjdk.org/jdk/pull/29480#discussion_r2755914781