RFR: 8320886: Unsafe_SetMemory0 is not guarded

Tue Nov 28 19:01:19 UTC 2023

On Tue, 28 Nov 2023 12:09:12 GMT, Jorn Vernee <jvernee at openjdk.org> wrote:

> See JBS issue.
> 
> Guard the memory access done in Unsafe_SetMemory0 to prevent a SIGBUS error from crashing the VM when a truncated memory mapped file is accessed.
> 
> Testing: local `InternalErrorTest`, Tier 1-5 (ongoing)

https://github.com/openjdk/jdk/pull/16760 Looks more performance focused, so I think that should be addressed separately.

I'm looking into the crash on mac

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PR Comment: https://git.openjdk.org/jdk/pull/16848#issuecomment-1830488963
PR Comment: https://git.openjdk.org/jdk/pull/16848#issuecomment-1830491876