--- a/hotspot/src/share/vm/services/diagnosticCommand.cpp	Thu Jan 24 23:30:45 2013 -0800
+++ b/hotspot/src/share/vm/services/diagnosticCommand.cpp	Fri Jan 25 15:06:18 2013 -0500
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2011, 2012, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2011, 2013, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -43,12 +43,12 @@
   DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<VMUptimeDCmd>(true, false));
   DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<SystemGCDCmd>(true, false));
   DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<RunFinalizationDCmd>(true, false));
-#if INCLUDE_SERVICES // Heap dumping supported
+#if INCLUDE_SERVICES // Heap dumping/inspection supported
   DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<HeapDumpDCmd>(true, false));
+  DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<ClassHistogramDCmd>(true, false));
+  DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<ClassStatsDCmd>(true, false));
 #endif // INCLUDE_SERVICES
-  DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<ClassHistogramDCmd>(true, false));
   DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<ThreadDumpDCmd>(true, false));
-
   //Enhanced JMX Agent Support
   DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<JMXStartRemoteDCmd>(true,false));
   DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<JMXStartLocalDCmd>(true,false));
@@ -252,7 +252,7 @@
                          vmSymbols::void_method_signature(), CHECK);
 }
 
-#if INCLUDE_SERVICES // Heap dumping supported
+#if INCLUDE_SERVICES // Heap dumping/inspection supported
 HeapDumpDCmd::HeapDumpDCmd(outputStream* output, bool heap) :
                            DCmdWithParser(output, heap),
   _filename("filename","Name of the dump file", "STRING",true),
@@ -292,7 +292,6 @@
     return 0;
   }
 }
-#endif // INCLUDE_SERVICES
 
 ClassHistogramDCmd::ClassHistogramDCmd(outputStream* output, bool heap) :
                                        DCmdWithParser(output, heap),
@@ -319,6 +318,65 @@
   }
 }
 
+#define DEFAULT_COLUMNS "InstBytes,KlassBytes,CpAll,annotations,MethodCount,Bytecodes,MethodAll,ROAll,RWAll,Total"
+ClassStatsDCmd::ClassStatsDCmd(outputStream* output, bool heap) :
+                                       DCmdWithParser(output, heap),
+  _csv("-csv", "Print in CSV (comma-separated values) format for spreadsheets",
+       "BOOLEAN", false, "false"),
+  _all("-all", "Show all columns",
+       "BOOLEAN", false, "false"),
+  _help("-help", "Show meaning of all the columns",
+       "BOOLEAN", false, "false"),
+  _columns("columns", "Comma-separated list of all the columns to show. "
+           "If not specified, the following columns are shown: " DEFAULT_COLUMNS,
+           "STRING", false) {
+  _dcmdparser.add_dcmd_option(&_all);
+  _dcmdparser.add_dcmd_option(&_csv);
+  _dcmdparser.add_dcmd_option(&_help);
+  _dcmdparser.add_dcmd_argument(&_columns);
+}
+
+void ClassStatsDCmd::execute(TRAPS) {
+  if (!UnlockDiagnosticVMOptions) {
+    output()->print_cr("GC.class_stats command requires -XX:+UnlockDiagnosticVMOptions");
+    return;
+  }
+
+  VM_GC_HeapInspection heapop(output(),
+                              true, /* request_full_gc */
+                              true /* need_prologue */);
+  heapop.set_csv_format(_csv.value());
+  heapop.set_print_help(_help.value());
+  heapop.set_print_class_stats(true);
+  if (_all.value()) {
+    if (_columns.has_value()) {
+      output()->print_cr("Cannot specify -all and individual columns at the same time");
+      return;
+    } else {
+      heapop.set_columns(NULL);
+    }
+  } else {
+    if (_columns.has_value()) {
+      heapop.set_columns(_columns.value());
+    } else {
+      heapop.set_columns(DEFAULT_COLUMNS);
+    }
+  }
+  VMThread::execute(&heapop);
+}
+
+int ClassStatsDCmd::num_arguments() {
+  ResourceMark rm;
+  ClassStatsDCmd* dcmd = new ClassStatsDCmd(NULL, false);
+  if (dcmd != NULL) {
+    DCmdMark mark(dcmd);
+    return dcmd->_dcmdparser.num_arguments();
+  } else {
+    return 0;
+  }
+}
+#endif // INCLUDE_SERVICES
+
 ThreadDumpDCmd::ThreadDumpDCmd(outputStream* output, bool heap) :
                                DCmdWithParser(output, heap),
   _locks("-l", "print java.util.concurrent locks", "BOOLEAN", false, "false") {