Memory Corruption in JDK-21 on x86_64 with AVX-512

[Carter Kozak]

Thank you for such a quick diagnosis, I really appreciate it!

While I don't have a good sense of the mapping between bug severity and backport/release criteria,
I suspect this issue may be a strong candidate for an out-of-band jdk-21 release. I'm certainly biased
because I had invalid bytes silently persisted, and defer to folks closer to the process.

Best,
Carter Kozak

On Wed, Sep 27, 2023, at 02:57, Xiaohong Gong wrote:
> Hi Carter,
>  
> Thanks for reporting this issue!
>  
> It seems the issue is caused by the calling of the super class’s “Ideal()” method in “LoadVectorMaskedNode::Ideal()” (code is: 8286941: Add mask IR for partial vector operations for ARM SVE by XiaohongGong · Pull Request #9037 · openjdk/jdk (github.com) <https://github.com/openjdk/jdk/pull/9037/files#diff-692826251cae892bc4737919579c6afbd317551cd507f99c7bd29d585c1282e2R1028>).
> Some optimization applied on “LoadNode” is not suitable for “LoadVectorMaskedNode” now. Reverting it back to “return nullptr” can make your benchmark pass.
>  
> I will look at this issue and try to fix it next. Thanks!