review(XS): 7145345: Code cache sweeper must cooperate with safepoints

[Vladimir Kozlov]

Looks good.

Was it enough? I don't see code for going into safepoint after bailing out from 
sweeper.

Thanks,
Vladimir

Igor Veresov wrote:
>   Code cache sweeper must yield to safepoint. With high numbers of 
> methods sweeping can block the safepoint from happening.
> 
> Webrev: http://cr.openjdk.java.net/~iveresov/7145345/webrev.00/
> 
> 
> igor
>