[9] RFR 8149740: NPEs when executing some HotSpotConstantReflectionProvider with null args

[Christian Thalinger]

Looks good.

> On Feb 12, 2016, at 3:20 AM, Konstantin Shefov <konstantin.shefov at oracle.com> wrote:
> 
> Hello
> 
> Please review a bug fix for jdk.vm.ci.hotspot.HotSpotConstantReflectionProvider methods. 
> 
> A NullPointerException is thrown, when one calls some methods of this calss with the argument equal to null. 
> 
> 1) readArrayLength(null); 
> 2) readArrayElement(null, someIndex); 
> 3) boxPrimitive(null); 
> 4) unboxPrimitive(null); 
> 
> According to javadoc of these methods, NPE should not be thrown in such cases.
> 
> Additional check should be added for null as the first argument.
> 
> Bug: https://bugs.openjdk.java.net/browse/JDK-8149740 <https://bugs.openjdk.java.net/browse/JDK-8149740> 
> Webrev: http://cr.openjdk.java.net/~kshefov/8149740/webrev.00/ <http://cr.openjdk.java.net/~kshefov/8149740/webrev.00/>
> 
> Thanks
> -Konstantin

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