RFR (S) 8206471: Race with ConcurrentHashTable deleting items on insert with cleanup thread

[Harold David Seigel]

Looks good.

Thanks, Harold


On 7/6/2018 3:41 PM, coleen.phillimore at oracle.com wrote:
> Summary: Only fetch Node::next once and use that result.
>
> A racing thread could NULL next->next()->next().  The Node itself is 
> stable until the write_synchronize() but the pointers may be updated.  
> See bug for more detail.
>
> open webrev at http://cr.openjdk.java.net/~coleenp/8206471.01/webrev
> bug link https://bugs.openjdk.java.net/browse/JDK-8206471
>
> Tested with SymbolTable changes and tests that failed.  Also tested 
> with mach5 hs-tier1-5 (in progress).
>
> This is actually Robbin's fix, and my review is that it looks good.
>
> Thanks,
> Coleen