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src/hotspot/share/services/diagnosticCommand.cpp

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@@ -94,10 +94,11 @@
   DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<SystemDictionaryDCmd>(full_export, true, false));
   DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<ClassHierarchyDCmd>(full_export, true, false));
   DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<SymboltableDCmd>(full_export, true, false));
   DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<StringtableDCmd>(full_export, true, false));
   DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<metaspace::MetaspaceDCmd>(full_export, true, false));
+  DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<PrintClassLayoutDCmd>(full_export, true, false));
   DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<EventLogDCmd>(full_export, true, false));
 #if INCLUDE_JVMTI // Both JVMTI and SERVICES have to be enabled to have this dcmd
   DCmdFactory::register_DCmdFactory(new DCmdFactoryImpl<JVMTIAgentLoadDCmd>(full_export, true, false));
 #endif // INCLUDE_JVMTI
 #endif // INCLUDE_SERVICES

@@ -1075,10 +1076,33 @@
   }
 }
 
 #endif
 
+PrintClassLayoutDCmd::PrintClassLayoutDCmd(outputStream* output, bool heap) :
+                                       DCmdWithParser(output, heap),
+  _classname("classname", "Name of class whose layout should be printed. ",
+             "STRING", true) {
+  _dcmdparser.add_dcmd_argument(&_classname);
+}
+
+void PrintClassLayoutDCmd::execute(DCmdSource source, TRAPS) {
+  VM_PrintClassLayout printClassLayoutOp(output(), _classname.value());
+  VMThread::execute(&printClassLayoutOp);
+}
+
+int PrintClassLayoutDCmd::num_arguments() {
+  ResourceMark rm;
+  PrintClassLayoutDCmd* dcmd = new PrintClassLayoutDCmd(NULL, false);
+  if (dcmd != NULL) {
+    DCmdMark mark(dcmd);
+    return dcmd->_dcmdparser.num_arguments();
+  } else {
+    return 0;
+  }
+}
+
 class VM_DumpTouchedMethods : public VM_Operation {
 private:
   outputStream* _out;
 public:
   VM_DumpTouchedMethods(outputStream* out) {
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