RFR: 8229169: False failure of GenericTaskQueue::pop_local on architectures with weak memory model
martin.doerr at sap.com
Tue Aug 6 14:12:20 UTC 2019
thanks for the new webrev.
> The writer calls GenericTaskQueue<E, F, N>::pop_global to update
> _age._top with _age.cmpxchg(newAge, oldAge)  .
> I think it already contains the release (or storestore) barrier semantic.
Yes. I agree.
> What do you think?
Looks reasonable to me, but somebody from GC team should also take a look.
> Here is my reproducer to debug this issue:
Maybe I didn't figure out how to run it correctly. Where's the source code for ClassLoaderGenerator.class?
Did you get the error while running javac?
It didn't crash on PPC64.
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