RFR: JDK-8133818: Additional number of processed references printed with -XX:+PrintReferenceGC after JDK-8047125

[Bengt Rutisson]

Hi everyone,

Could I have a couple of reviews for this patch contributed by Ramki?

http://cr.openjdk.java.net/~brutisso/8133818/webrev.00/
https://bugs.openjdk.java.net/browse/JDK-8133818

This changes the log format to print Cleaners separately from 
PhantomReferences.

Old logging:

#0: [PhantomReference, 0 refs, 0 refs, 0,0000433 secs]

New logigng:

#0: [PhantomReference, 0 refs, 0,0000797 secs]#0: [Cleaners, 0 refs, 
0,0000527 secs]

It also adds the number of references processed for the JNI Weak 
References section.

Old logging:

#0: [JNI Weak Reference, 0,0000211 secs]

New logging:

#0: [JNI Weak Reference, 0 refs, 0,0000401 secs]

Here are full log entry examples with -XX:+PrintGCDetails 
-XX:+PrintReferenceGC:

Old logging:

#0: [GC (System.gc()) #0: [SoftReference, 0 refs, 0,0000713 secs]#0: 
[WeakReference, 8 refs, 0,0000306 secs]#0: [FinalReference, 7 refs, 
0,0000445 secs]#0: [PhantomReference, 0 refs, 0 refs, 0,0000433 secs]#0: 
[JNI Weak Reference, 0,0000211 secs][PSYoungGen: 7741K->912K(150016K)] 
7741K->920K(493056K), 0,0053059 secs] [Times: user=0,05 sys=0,00 
real=0,00 secs]


New logging:

#0: [GC (System.gc()) #0: [SoftReference, 0 refs, 0,0001244 secs]#0: 
[WeakReference, 8 refs, 0,0001069 secs]#0: [FinalReference, 5 refs, 
0,0001086 secs]#0: [PhantomReference, 0 refs, 0,0000797 secs]#0: 
[Cleaners, 0 refs, 0,0000527 secs]#0: [JNI Weak Reference, 0 refs, 
0,0000401 secs][PSYoungGen: 2580K->768K(150016K)] 2580K->776K(493056K), 
0,0130553 secs] [Times: user=0,16 sys=0,01 real=0,01 secs]


Unless there are larger changes suggested to this patch I will push this 
with Ramki as author.

Thanks,
Bengt