RFR 8176147: JVM should throw CFE for duplicate Signature attributes

[George Triantafillou]

Hi Harold,

Looks good!

-George

On 3/7/2017 8:52 AM, harold seigel wrote:
> Hi,
>
> Please review this JDK-9 fix to throw a ClassFormatError exception if 
> the attributes table for a class, field, or method contains more than 
> one Signature attribute.
>
> Open webrev: http://cr.openjdk.java.net/~hseigel/bug_8176147/webrev/
>
> JBS Bug: https://bugs.openjdk.java.net/browse/JDK-8176147
>
> The fix was tested with the JCK lang and vm tests, the JTreg hotspot, 
> java/io, java/lang, java/util and other tests, the RBT tier2 -tier5 
> tests, the colocated and non-colocated NSK tests, and with JPRT.
>
> Thanks, Harold
>