RFR (S) JDK-8014912 Restore PrintSharedSpaces after NPG

[Ioi Lam]

Please review:

http://cr.openjdk.java.net/~iklam/8014912/print_sharedspc_001/

Bug: Restore PrintSharedSpaces functionality after NPG

http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=8014912
     https://jbs.oracle.com/bugs/browse/JDK-8014912

Summary of fix:

I added a new enum, MetaspaceObj::Type, which is passed to

     Metaspace::allocate(ClassLoaderData* loader_data, size_t word_size,
                         bool read_only, MetaspaceObj::Type type, TRAPS);

During CDS dumping, all allocations are logged in a linked list to
be processed later by metaspaceShared.cpp to generate statistics for
objects in the CDS archive. See sample output below.

* No such logging is doneat normal VM execution time so there
   is no performance impact.

* I verified that the patch can be applied cleanly on Jon's
   recentpatch for JDK-8014862 "Add fast Metasapce capacity and
   used per MetadataType"

http://hg.openjdk.java.net/hsx/hotspot-gc/hotspot/rev/2b1a9d972fc2

Testing:

     JPRT, UTE (vm.quick.testlist)

Sample output:

                         ro_cnt   ro_bytes     % | rw_cnt   rw_bytes     
% |  all_cnt  all_bytes     %
--------------------+---------------------------+---------------------------+--------------------------
Unknown             :        1         64   0.0 | 1         64   0.0 
|        2        128   0.0
Class               :        0          0   0.0 | 2364    2006080  14.7 
|     2364    2006080   9.2
Symbol              :    49858    2507168  30.9 | 0          0   0.0 
|    49858    2507168  11.5
TypeArrayU1         :    13264     608336   7.5 | 2365     428784   3.1 
|    15629    1037120   4.8
TypeArrayU2         :     4796     341952   4.2 | 0          0   0.0 
|     4796     341952   1.6
TypeArrayU4         :     2371     178528   2.2 | 0          0   0.0 
|     2371     178528   0.8
TypeArrayU8         :     3708     365920   4.5 | 0          0   0.0 
|     3708     365920   1.7
TypeArrayOther      :        0          0   0.0 | 0          0   0.0 
|        0          0   0.0
Method              :        0          0   0.0 | 32552    3659888  26.8 
|    32552    3659888  16.8
ConstMethod         :    32552    4099008  50.6 | 0          0   0.0 
|    32552    4099008  18.8
MethodData          :        0          0   0.0 | 0          0   0.0 
|        0          0   0.0
ConstantPool        :        0          0   0.0 | 2365    3225600  23.6 
|     2365    3225600  14.8
ConstantPoolCache   :        0          0   0.0 | 2350    2212320  16.2 
|     2350    2212320  10.2
Annotation          :       26       1248   0.0 | 0          0   0.0 
|       26       1248   0.0
MethodCounters      :        0          0   0.0 | 0          0   0.0 
|        0          0   0.0
SymbolHashentry     :        0          0   0.0 | 49858    1595456  11.7 
|    49858    1595456   7.3
SymbolBuckets       :        0          0   0.0 | 20011     320176   2.3 
|    20011     320176   1.5
Other               :        0          0   0.0 | 0     203893   1.5 
|        0     203893   0.9
--------------------+---------------------------+---------------------------+--------------------------
Total               :   106576    8102224 100.0 | 111866   13652261 
100.0 |   218442   21754485 100.0


Thanks,
Ioi