RFR: JDK-8322163: runtime/Unsafe/InternalErrorTest.java fails on Alpine after JDK-8320886 [v2]

[Martin Doerr]

On Fri, 22 Dec 2023 08:12:56 GMT, Matthias Baesken <mbaesken at openjdk.org> wrote:

>> We notice failures/crashes on Alpine Linux, maybe after [JDK-8320886](https://bugs.openjdk.org/browse/JDK-8320886).
>> test runtime/Unsafe/InternalErrorTest.java crashes on Alpine (works fine on other test OS/CPU platforms) :
>> 
>> 
>> #
>> # SIGSEGV (0xb) at pc=0x00007fd3c080064f, pid=7075, tid=7161
>> #
>> # JRE version: OpenJDK Runtime Environment (23.0) (build 23-internal-adhoc.jenkinsi.jdk)
>> # Java VM: OpenJDK 64-Bit Server VM (23-internal-adhoc.jenkinsi.jdk, mixed mode, sharing, tiered, compressed oops, compressed class ptrs, g1 gc, linux-amd64)
>> # Problematic frame:
>> # C [ld-musl-x86_64.so.1+0x5464f] memset+0xa7
>> #
>> 
>> 
>> Looks like the Alpine memset triggers unexpected SIGSEGV  (not the expected SIGBUS).  So we switch to a loop instead of memset.    However I noticed that on Linux aarch64  the test starts to fail when the loop is used instead of the memset, so I keep the old coding on this platform .
>
> Matthias Baesken has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Do loop only on Alpine/MUSL

I think this is an acceptable solution.

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Marked as reviewed by mdoerr (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/17175#pullrequestreview-1794210054