[aarch64-port-dev ] JDK 13 AArch64 issues to backport

[Andrew Haley]

Please note: my comments were not about whether the patches should be
applied but whether they would have a critical impact, and by this I
mean impact on users. This line got snipped.

On 6/19/19 7:16 PM, Aleksey Shipilev wrote:
> On 6/19/19 6:54 PM, Andrew Haley wrote:
>> On 6/19/19 5:37 PM, Andrew Dinn wrote:
>>> Am I supposed to backport them now or is anyone else going to step in?
> 
>>   8215879: Aarch64: ReservedStackAccess may leave stack guard in inconsistent state
>>
>> No: obscure runtime option
> 
> This is not a runtime option, but the special annotation @ReservedStackAccess. But that annotation
> is only available since 9 via JEP 270. So it is not applicable to 8u. Removed the affected versions.
>>   8209413: AArch64: NPE in clhsdb jstack command
>>
>> No: debugging only
> 
> I remember you were telling me that the first thing you want to always work is the debugger. It
> seems to fix it, plus resolves a FIXME.

Sure, should be fixed, not critical.

>>   8219993: AArch64: Compiled CI stubs are unsafely modified
>>
>> No: theoretical memory-model issue, never seen in the wild
> 
> Well, kinda, do we want to bet it would not ever show up?

No, indeed not, but probably not critical.

>>   8219006: AArch64: Register corruption in slow subtype check
>>
>> No: debug mode only
> 
> Same reasoning about debugging capabilities as for 8209413.

Sam response as above.

-- 
Andrew Haley
Java Platform Lead Engineer
Red Hat UK Ltd. <https://www.redhat.com>
https://keybase.io/andrewhaley
EAC8 43EB D3EF DB98 CC77 2FAD A5CD 6035 332F A671