RFR (S) 8232788: Move biased locking initalization

David Holmes david.holmes at oracle.com
Wed Oct 23 02:29:46 UTC 2019

Hi Coleen,

On 23/10/2019 5:54 am, coleen.phillimore at oracle.com wrote:
> Summary: Move from before adding to the dictionary to during 
> InstanceKlass construction, which occurs right before.

Right before? I had trouble seeing where the IK was created relative to 
the call to SD::update_dictionary. But I don't think it really matters 
as long as the biased locking state is set before the new IK gets added 
to the SD.

But I don't understand the change to restore_shareableinfo. Where would 
the biased locking state get set on that code path today?


> Tested with tier1 all Oracle platforms, tier 2-3, linux-x64-debug, tier1 
> with -XX:BiasedLockingDelay=100, and gtest with -XX:-UseBiasedLocking.
> open webrev at http://cr.openjdk.java.net/~coleenp/2019/8232788.01/webrev
> bug link https://bugs.openjdk.java.net/browse/JDK-8232788
> Thanks,
> Coleen

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