RFR: 8209120: Archive the Integer.IntegerCache
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
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