RFR 8207779: Method::is_valid_method() compares 'this' with NULL

[Lois Foltan]

Looks good.
Lois

On 7/25/2018 11:47 AM, Harold David Seigel wrote:
> Hi,
>
> Please review this JDK-12 fix for bug JDK-8207779.  The fix changes 
> function is_valid_method() into a static function to avoid comparisons 
> between 'this' and NULL and to avoid accessing the validating method 
> through the Method being validated.
>
> Open Webrev: 
> http://cr.openjdk.java.net/~hseigel/bug_8207779/webrev/index.html
>
> JBS Bug:  https://bugs.openjdk.java.net/browse/JDK-8207779
>
> This fix was regression tested by running Mach5 tiers 1 and 2 tests 
> and builds on Linux-X64, Windows, Solaris Sparc, and Mac OS X, running 
> tiers 3-5 tests on Linux-x64, and by running JCK-11 Lang and VM tests 
> on Linux-x64.
>
> Thanks, Harold
>