RFR: 8209120: Archive the Integer.IntegerCache

Claes Redestad claes.redestad at oracle.com
Thu Aug 9 16:52:38 UTC 2018

On 2018-08-09 18:38, Peter Levart wrote:
> On 08/09/2018 06:28 PM, Claes Redestad wrote:
>> On 2018-08-09 17:41, Peter Levart wrote:
>>> There's danger when you overwrite a non-null @Stable field with 
>>> another value that this new value will not be seen. Or is <clinit> 
>>> code an exception where @Stable is not honored yet...
>> Typically IntegerCache::<clinit> runs before JIT has even started, so 
>> I think we're OK even though the double-assignment is undefined. But 
>> it's a good question what happens in cases we're running AOTd code, 
>> so perhaps this pattern might be problematic in some future..
> What if you run it with -Xcomp ? 


> Would still be run by interpreter at startup?

Yes, -Xcomp doesn't change when JIT threads start running; verified on a 
debug build that IntegerCache.<clinit> is executed by the interpreter 
even with -Xcomp


More information about the hotspot-runtime-dev mailing list