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

[Matthias Baesken]

On Thu, 21 Dec 2023 09:12:33 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 .

Hi Martin,
> If we only want to do a simple fix for Alpine x86_64, I suggest to use the new code only on that platform.

I adjusted the code so that the loop is only done on Alpine/MUSL .

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PR Comment: https://git.openjdk.org/jdk/pull/17175#issuecomment-1867370002