RFR(L): JDK-8046936 : JEP 270: Reserved Stack Areas for Critical Sections

Doug Lea dl at cs.oswego.edu
Thu Nov 12 01:09:00 UTC 2015

On 11/10/2015 12:38 PM, frederic parain wrote:

>> If I put on some extra-strength rose-coloured glasses I think I can
>> almost read that as "something is better than nothing". ;-)

Yeah, that's what I meant :-) It is good to at least have the
@ReservedStackAccess annotation and mechanism in place. Finding
the best way to use it will take more thought and empirical evaluation.

So I suggest that the hotspot support part of the webrev be put into place,
and that we incorporate j.u.c updates using it after further exploration
and evaluation -- we do have a lot of tests using locks etc, so are in
a better position to make better decisions about alternative placement
strategies after trying them.

>> But note that it is not the finally part that need be at issue.

Right. But given the existence of @ReservedStackAccess, we might be
able to rework some code so as to use it more sparingly.


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