RFR(S): 8141585: CompilerDirectivesDCMDTest intermittently SEGVs in MethodMatcher::matcher

[Christian Thalinger]

Looks good.

> On Nov 12, 2015, at 3:10 AM, Nils Eliasson <nils.eliasson at oracle.com> wrote:
> 
> Hi,
> 
> Please review this small fix.
> 
> Two issues where identified when investigating this crash:
> 1) In CompileBroker a methodHandle was not used when looking up the directive
> 2) In DirectivesStack::getMatchingDirective the directivesStack::_top was accessed before taking the DirectivesStack_lock
> 
> bug: https://bugs.openjdk.java.net/browse/JDK-8141585 <https://bugs.openjdk.java.net/browse/JDK-8141585>
> webrev: http://cr.openjdk.java.net/~neliasso/8141585/webrev.01/ <http://cr.openjdk.java.net/~neliasso/8141585/webrev.01/>
> 
> Regards,
> Nils Eliasson
> 

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