RFR: 8158946 - btree009 fails with assert(s > 0) failed: Bad size calculated

[Joseph Provino]

Looks good.

joe

On 6/21/2016 2:46 PM, Derek White wrote:
> https://bugs.openjdk.java.net/browse/JDK-8158946
>
> This bug is a race between an assertion in the CMS sweeper and a Java 
> thread loading a class. See the bug report for full description of the 
> race.
>
> The fix is to bypass the assertion in CMS for this case, and add extra 
> assertions to catch similar data races in the future.
>
> Webrev: http://cr.openjdk.java.net/~drwhite/8158946/webrev.01
>
> Tests: jprt
>
> - Derek
>