RFR(S) 8151342: Add module name/version to class histogram output

[George Triantafillou]

Hi Harold,

Looks good!

-George

On 4/27/2016 8:34 AM, harold seigel wrote:
> Hi,
>
> Please review this small change to add module information to the class 
> histogram displayed by tools such as jmap and jcmd.  The module name 
> and version will follow the class name and be enclosed in 
> parentheses.  Classes not in modules will not contain module 
> information.  For example:
>
>  num     #instances         #bytes  class name (module)
> -------------------------------------------------------
>    1:          7892        1575952  [B (java.base at 9-internal)
>    2:          1783         214672  java.lang.Class 
> (java.base at 9-internal)
>    3:          5749         183968  java.util.HashMap$Node 
> (java.base at 9-internal)
>    4:          7081         169944  java.lang.String 
> (java.base at 9-internal)
>    5:          1881          95312  [Ljava.lang.Object; 
> (java.base at 9-internal)
>    6:           785          90832  [I (java.base at 9-internal)
>                           ...
>   16:          1024          16384  ClassHistogramTest$TestClass
>                           ...
>
>
> Open webrev: http://cr.openjdk.java.net/~hseigel/bug_8151342/
>
> JBS bug:  https://bugs.openjdk.java.net/browse/JDK-8151342
>
> The fix was tested with JCK Lang, and VM tests, the UTE colocated and 
> non-colocated quick tests, and the JTreg jdk_svc, hotspot, JDK 
> java/io, java/lang, java/util, and java/security tests.
>
> Thanks, Harold
>