[lworld] RFR: 8371604: [lworld] SIGSEGV in InlineKlass::is_payload_marked_as_null

[Paul Hübner]

On Fri, 21 Nov 2025 14:07:32 GMT, Frederic Parain <fparain at openjdk.org> wrote:

>> Hi all,
>> 
>> This patch fixes several `int` overflows relating to flat array element loads/stores. 
>> I've included some gtests that address a subset of these changes.  We should test flat arrays larger than 16GB in size, which is not something we can feasibly do in our tier1 jtreg tests. I've filed [JDK-8372261](https://bugs.openjdk.org/browse/JDK-8372261) as a follow-up RFE to investigate this.
>> 
>> Testing: tiers 1-4, [`LocalityCheck.java`](https://bugs.openjdk.org/secure/attachment/117136/LocalityCheck.java) run locally 100 times.
>
> Correction, the possible overflow is in DelayedLoadIndexed, not DelayedFieldAccess, thank you Paul for figuring this out.

Thanks for the reviews and help, @fparain, @coleenp and @TobiHartmann.

-------------

PR Comment: https://git.openjdk.org/valhalla/pull/1752#issuecomment-3569605132