src/hotspot/share/services/diagnosticCommand.hpp
changeset 47216 71c04702a3d5
parent 46742 24ec8a039c90
child 49053 0b61efd5a439
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/hotspot/share/services/diagnosticCommand.hpp	Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,842 @@
+/*
+ * Copyright (c) 2011, 2017, 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
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ *
+ */
+
+#ifndef SHARE_VM_SERVICES_DIAGNOSTICCOMMAND_HPP
+#define SHARE_VM_SERVICES_DIAGNOSTICCOMMAND_HPP
+
+#include "classfile/stringTable.hpp"
+#include "classfile/symbolTable.hpp"
+#include "classfile/systemDictionary.hpp"
+#include "classfile/vmSymbols.hpp"
+#include "runtime/arguments.hpp"
+#include "runtime/os.hpp"
+#include "runtime/vmThread.hpp"
+#include "services/diagnosticArgument.hpp"
+#include "services/diagnosticCommand.hpp"
+#include "services/diagnosticCommand_ext.hpp"
+#include "services/diagnosticFramework.hpp"
+#include "utilities/macros.hpp"
+#include "utilities/ostream.hpp"
+#include "oops/method.hpp"
+
+class HelpDCmd : public DCmdWithParser {
+protected:
+  DCmdArgument<bool> _all;
+  DCmdArgument<char*> _cmd;
+public:
+  HelpDCmd(outputStream* output, bool heap);
+  static const char* name() { return "help"; }
+  static const char* description() {
+    return "For more information about a specific command use 'help <command>'. "
+           "With no argument this will show a list of available commands. "
+           "'help all' will show help for all commands.";
+  }
+  static const char* impact() { return "Low"; }
+  static int num_arguments();
+  virtual void execute(DCmdSource source, TRAPS);
+};
+
+class VersionDCmd : public DCmd {
+public:
+  VersionDCmd(outputStream* output, bool heap) : DCmd(output,heap) { }
+  static const char* name() { return "VM.version"; }
+  static const char* description() {
+    return "Print JVM version information.";
+  }
+  static const char* impact() { return "Low"; }
+  static const JavaPermission permission() {
+    JavaPermission p = {"java.util.PropertyPermission",
+                        "java.vm.version", "read"};
+    return p;
+  }
+  static int num_arguments() { return 0; }
+  virtual void execute(DCmdSource source, TRAPS);
+};
+
+class CommandLineDCmd : public DCmd {
+public:
+  CommandLineDCmd(outputStream* output, bool heap) : DCmd(output, heap) { }
+  static const char* name() { return "VM.command_line"; }
+  static const char* description() {
+    return "Print the command line used to start this VM instance.";
+  }
+  static const char* impact() { return "Low"; }
+  static const JavaPermission permission() {
+    JavaPermission p = {"java.lang.management.ManagementPermission",
+                        "monitor", NULL};
+    return p;
+  }
+  static int num_arguments() { return 0; }
+  virtual void execute(DCmdSource source, TRAPS) {
+    Arguments::print_on(_output);
+  }
+};
+
+// See also: get_system_properties in attachListener.cpp
+class PrintSystemPropertiesDCmd : public DCmd {
+public:
+  PrintSystemPropertiesDCmd(outputStream* output, bool heap) : DCmd(output, heap) { }
+    static const char* name() { return "VM.system_properties"; }
+    static const char* description() {
+      return "Print system properties.";
+    }
+    static const char* impact() {
+      return "Low";
+    }
+    static const JavaPermission permission() {
+      JavaPermission p = {"java.util.PropertyPermission",
+                          "*", "read"};
+      return p;
+    }
+    static int num_arguments() { return 0; }
+    virtual void execute(DCmdSource source, TRAPS);
+};
+
+// See also: print_flag in attachListener.cpp
+class PrintVMFlagsDCmd : public DCmdWithParser {
+protected:
+  DCmdArgument<bool> _all;
+public:
+  PrintVMFlagsDCmd(outputStream* output, bool heap);
+  static const char* name() { return "VM.flags"; }
+  static const char* description() {
+    return "Print VM flag options and their current values.";
+  }
+  static const char* impact() {
+    return "Low";
+  }
+  static const JavaPermission permission() {
+    JavaPermission p = {"java.lang.management.ManagementPermission",
+                        "monitor", NULL};
+    return p;
+  }
+  static int num_arguments();
+  virtual void execute(DCmdSource source, TRAPS);
+};
+
+class SetVMFlagDCmd : public DCmdWithParser {
+protected:
+  DCmdArgument<char*> _flag;
+  DCmdArgument<char*> _value;
+
+public:
+  SetVMFlagDCmd(outputStream* output, bool heap);
+  static const char* name() { return "VM.set_flag"; }
+  static const char* description() {
+    return "Sets VM flag option using the provided value.";
+  }
+  static const char* impact() {
+    return "Low";
+  }
+  static const JavaPermission permission() {
+    JavaPermission p = {"java.lang.management.ManagementPermission",
+                        "control", NULL};
+    return p;
+  }
+  static int num_arguments();
+  virtual void execute(DCmdSource source, TRAPS);
+};
+
+class JVMTIDataDumpDCmd : public DCmd {
+public:
+  JVMTIDataDumpDCmd(outputStream* output, bool heap) : DCmd(output, heap) { }
+  static const char* name() { return "JVMTI.data_dump"; }
+  static const char* description() {
+    return "Signal the JVM to do a data-dump request for JVMTI.";
+  }
+  static const char* impact() {
+    return "High";
+  }
+  static const JavaPermission permission() {
+    JavaPermission p = {"java.lang.management.ManagementPermission",
+                        "monitor", NULL};
+    return p;
+  }
+  static int num_arguments() { return 0; }
+  virtual void execute(DCmdSource source, TRAPS);
+};
+
+#if INCLUDE_SERVICES
+#if INCLUDE_JVMTI
+class JVMTIAgentLoadDCmd : public DCmdWithParser {
+protected:
+  DCmdArgument<char*> _libpath;
+  DCmdArgument<char*> _option;
+public:
+  JVMTIAgentLoadDCmd(outputStream* output, bool heap);
+  static const char* name() { return "JVMTI.agent_load"; }
+  static const char* description() {
+    return "Load JVMTI native agent.";
+  }
+  static const char* impact() { return "Low"; }
+  static const JavaPermission permission() {
+    JavaPermission p = {"java.lang.management.ManagementPermission",
+                        "control", NULL};
+    return p;
+  }
+  static int num_arguments();
+  virtual void execute(DCmdSource source, TRAPS);
+};
+#endif // INCLUDE_JVMTI
+#endif // INCLUDE_SERVICES
+
+class VMDynamicLibrariesDCmd : public DCmd {
+public:
+  VMDynamicLibrariesDCmd(outputStream* output, bool heap);
+  static const char* name() {
+    return "VM.dynlibs";
+  }
+  static const char* description() {
+    return "Print loaded dynamic libraries.";
+  }
+  static const char* impact() {
+    return "Low";
+  }
+  static const JavaPermission permission() {
+    JavaPermission p = {"java.lang.management.ManagementPermission",
+                        "monitor", NULL};
+    return p;
+  }
+  static int num_arguments() {
+    return 0;
+  };
+  virtual void execute(DCmdSource source, TRAPS);
+};
+
+class VMUptimeDCmd : public DCmdWithParser {
+protected:
+  DCmdArgument<bool> _date;
+public:
+  VMUptimeDCmd(outputStream* output, bool heap);
+  static const char* name() { return "VM.uptime"; }
+  static const char* description() {
+    return "Print VM uptime.";
+  }
+  static const char* impact() {
+    return "Low";
+  }
+  static int num_arguments();
+  virtual void execute(DCmdSource source, TRAPS);
+};
+
+class VMInfoDCmd : public DCmd {
+public:
+  VMInfoDCmd(outputStream* output, bool heap) : DCmd(output, heap) { }
+  static const char* name() { return "VM.info"; }
+  static const char* description() {
+    return "Print information about JVM environment and status.";
+  }
+  static const char* impact() { return "Low"; }
+  static const JavaPermission permission() {
+    JavaPermission p = {"java.lang.management.ManagementPermission",
+                        "monitor", NULL};
+    return p;
+  }
+  static int num_arguments() { return 0; }
+  virtual void execute(DCmdSource source, TRAPS);
+};
+
+class SystemGCDCmd : public DCmd {
+public:
+  SystemGCDCmd(outputStream* output, bool heap) : DCmd(output, heap) { }
+    static const char* name() { return "GC.run"; }
+    static const char* description() {
+      return "Call java.lang.System.gc().";
+    }
+    static const char* impact() {
+      return "Medium: Depends on Java heap size and content.";
+    }
+    static int num_arguments() { return 0; }
+    virtual void execute(DCmdSource source, TRAPS);
+};
+
+class RunFinalizationDCmd : public DCmd {
+public:
+  RunFinalizationDCmd(outputStream* output, bool heap) : DCmd(output, heap) { }
+    static const char* name() { return "GC.run_finalization"; }
+    static const char* description() {
+      return "Call java.lang.System.runFinalization().";
+    }
+    static const char* impact() {
+      return "Medium: Depends on Java content.";
+    }
+    static int num_arguments() { return 0; }
+    virtual void execute(DCmdSource source, TRAPS);
+};
+
+class HeapInfoDCmd : public DCmd {
+public:
+  HeapInfoDCmd(outputStream* output, bool heap) : DCmd(output, heap) { }
+  static const char* name() { return "GC.heap_info"; }
+  static const char* description() {
+    return "Provide generic Java heap information.";
+  }
+  static const char* impact() {
+    return "Medium";
+  }
+  static int num_arguments() { return 0; }
+  static const JavaPermission permission() {
+    JavaPermission p = {"java.lang.management.ManagementPermission",
+      "monitor", NULL};
+      return p;
+  }
+
+  virtual void execute(DCmdSource source, TRAPS);
+};
+
+class FinalizerInfoDCmd : public DCmd {
+public:
+  FinalizerInfoDCmd(outputStream* output, bool heap) : DCmd(output, heap) { }
+  static const char* name() { return "GC.finalizer_info"; }
+  static const char* description() {
+    return "Provide information about Java finalization queue.";
+  }
+  static const char* impact() {
+    return "Medium";
+  }
+  static int num_arguments() { return 0; }
+  static const JavaPermission permission() {
+    JavaPermission p = {"java.lang.management.ManagementPermission",
+      "monitor", NULL};
+      return p;
+  }
+
+  virtual void execute(DCmdSource source, TRAPS);
+};
+
+#if INCLUDE_SERVICES   // Heap dumping supported
+// See also: dump_heap in attachListener.cpp
+class HeapDumpDCmd : public DCmdWithParser {
+protected:
+  DCmdArgument<char*> _filename;
+  DCmdArgument<bool>  _all;
+public:
+  HeapDumpDCmd(outputStream* output, bool heap);
+  static const char* name() {
+    return "GC.heap_dump";
+  }
+  static const char* description() {
+    return "Generate a HPROF format dump of the Java heap.";
+  }
+  static const char* impact() {
+    return "High: Depends on Java heap size and content. "
+           "Request a full GC unless the '-all' option is specified.";
+  }
+  static const JavaPermission permission() {
+    JavaPermission p = {"java.lang.management.ManagementPermission",
+                        "monitor", NULL};
+    return p;
+  }
+  static int num_arguments();
+  virtual void execute(DCmdSource source, TRAPS);
+};
+#endif // INCLUDE_SERVICES
+
+// See also: inspectheap in attachListener.cpp
+class ClassHistogramDCmd : public DCmdWithParser {
+protected:
+  DCmdArgument<bool> _all;
+public:
+  ClassHistogramDCmd(outputStream* output, bool heap);
+  static const char* name() {
+    return "GC.class_histogram";
+  }
+  static const char* description() {
+    return "Provide statistics about the Java heap usage.";
+  }
+  static const char* impact() {
+    return "High: Depends on Java heap size and content.";
+  }
+  static const JavaPermission permission() {
+    JavaPermission p = {"java.lang.management.ManagementPermission",
+                        "monitor", NULL};
+    return p;
+  }
+  static int num_arguments();
+  virtual void execute(DCmdSource source, TRAPS);
+};
+
+class ClassStatsDCmd : public DCmdWithParser {
+protected:
+  DCmdArgument<bool> _all;
+  DCmdArgument<bool> _csv;
+  DCmdArgument<bool> _help;
+  DCmdArgument<char*> _columns;
+public:
+  ClassStatsDCmd(outputStream* output, bool heap);
+  static const char* name() {
+    return "GC.class_stats";
+  }
+  static const char* description() {
+    return "Provide statistics about Java class meta data.";
+  }
+  static const char* impact() {
+    return "High: Depends on Java heap size and content.";
+  }
+  static int num_arguments();
+  virtual void execute(DCmdSource source, TRAPS);
+};
+
+
+class ClassHierarchyDCmd : public DCmdWithParser {
+protected:
+  DCmdArgument<bool> _print_interfaces; // true if inherited interfaces should be printed.
+  DCmdArgument<bool> _print_subclasses; // true if subclasses of the specified classname should be printed.
+  DCmdArgument<char*> _classname; // Optional single class name whose hierarchy should be printed.
+public:
+  ClassHierarchyDCmd(outputStream* output, bool heap);
+  static const char* name() {
+    return "VM.class_hierarchy";
+  }
+  static const char* description() {
+    return "Print a list of all loaded classes, indented to show the class hiearchy. "
+           "The name of each class is followed by the ClassLoaderData* of its ClassLoader, "
+           "or \"null\" if loaded by the bootstrap class loader.";
+  }
+  static const char* impact() {
+      return "Medium: Depends on number of loaded classes.";
+  }
+  static const JavaPermission permission() {
+    JavaPermission p = {"java.lang.management.ManagementPermission",
+                        "monitor", NULL};
+    return p;
+  }
+  static int num_arguments();
+  virtual void execute(DCmdSource source, TRAPS);
+};
+
+class TouchedMethodsDCmd : public DCmdWithParser {
+public:
+  TouchedMethodsDCmd(outputStream* output, bool heap);
+  static const char* name() {
+    return "VM.print_touched_methods";
+  }
+  static const char* description() {
+    return "Print all methods that have ever been touched during the lifetime of this JVM.";
+  }
+  static const char* impact() {
+    return "Medium: Depends on Java content.";
+  }
+  static int num_arguments();
+  virtual void execute(DCmdSource source, TRAPS);
+};
+
+// See also: thread_dump in attachListener.cpp
+class ThreadDumpDCmd : public DCmdWithParser {
+protected:
+  DCmdArgument<bool> _locks;
+public:
+  ThreadDumpDCmd(outputStream* output, bool heap);
+  static const char* name() { return "Thread.print"; }
+  static const char* description() {
+    return "Print all threads with stacktraces.";
+  }
+  static const char* impact() {
+    return "Medium: Depends on the number of threads.";
+  }
+  static const JavaPermission permission() {
+    JavaPermission p = {"java.lang.management.ManagementPermission",
+                        "monitor", NULL};
+    return p;
+  }
+  static int num_arguments();
+  virtual void execute(DCmdSource source, TRAPS);
+};
+
+// Enhanced JMX Agent support
+
+class JMXStartRemoteDCmd : public DCmdWithParser {
+
+  // Explicitly list all properties that could be
+  // passed to Agent.startRemoteManagementAgent()
+  // com.sun.management is omitted
+
+  DCmdArgument<char *> _config_file;
+  DCmdArgument<char *> _jmxremote_host;
+  DCmdArgument<char *> _jmxremote_port;
+  DCmdArgument<char *> _jmxremote_rmi_port;
+  DCmdArgument<char *> _jmxremote_ssl;
+  DCmdArgument<char *> _jmxremote_registry_ssl;
+  DCmdArgument<char *> _jmxremote_authenticate;
+  DCmdArgument<char *> _jmxremote_password_file;
+  DCmdArgument<char *> _jmxremote_access_file;
+  DCmdArgument<char *> _jmxremote_login_config;
+  DCmdArgument<char *> _jmxremote_ssl_enabled_cipher_suites;
+  DCmdArgument<char *> _jmxremote_ssl_enabled_protocols;
+  DCmdArgument<char *> _jmxremote_ssl_need_client_auth;
+  DCmdArgument<char *> _jmxremote_ssl_config_file;
+
+  // JDP support
+  // Keep autodiscovery char* not bool to pass true/false
+  // as property value to java level.
+  DCmdArgument<char *> _jmxremote_autodiscovery;
+  DCmdArgument<jlong>  _jdp_port;
+  DCmdArgument<char *> _jdp_address;
+  DCmdArgument<char *> _jdp_source_addr;
+  DCmdArgument<jlong>  _jdp_ttl;
+  DCmdArgument<jlong>  _jdp_pause;
+  DCmdArgument<char *> _jdp_name;
+
+public:
+  JMXStartRemoteDCmd(outputStream *output, bool heap_allocated);
+
+  static const char *name() {
+    return "ManagementAgent.start";
+  }
+
+  static const char *description() {
+    return "Start remote management agent.";
+  }
+
+  static int num_arguments();
+
+  virtual void execute(DCmdSource source, TRAPS);
+
+};
+
+class JMXStartLocalDCmd : public DCmd {
+
+  // Explicitly request start of local agent,
+  // it will not be started by start dcmd
+
+
+public:
+  JMXStartLocalDCmd(outputStream *output, bool heap_allocated);
+
+  static const char *name() {
+    return "ManagementAgent.start_local";
+  }
+
+  static const char *description() {
+    return "Start local management agent.";
+  }
+
+  virtual void execute(DCmdSource source, TRAPS);
+
+};
+
+class JMXStopRemoteDCmd : public DCmd {
+public:
+  JMXStopRemoteDCmd(outputStream *output, bool heap_allocated) :
+  DCmd(output, heap_allocated) {
+    // Do Nothing
+  }
+
+  static const char *name() {
+    return "ManagementAgent.stop";
+  }
+
+  static const char *description() {
+    return "Stop remote management agent.";
+  }
+
+  virtual void execute(DCmdSource source, TRAPS);
+};
+
+// Print the JMX system status
+class JMXStatusDCmd : public DCmd {
+public:
+  JMXStatusDCmd(outputStream *output, bool heap_allocated);
+
+  static const char *name() {
+    return "ManagementAgent.status";
+  }
+
+  static const char *description() {
+    return "Print the management agent status.";
+  }
+
+  static const JavaPermission permission() {
+    JavaPermission p = {"java.lang.management.ManagementPermission",
+                        "monitor", NULL};
+    return p;
+  }
+
+  virtual void execute(DCmdSource source, TRAPS);
+
+};
+
+class CompileQueueDCmd : public DCmd {
+public:
+  CompileQueueDCmd(outputStream* output, bool heap) : DCmd(output, heap) {}
+  static const char* name() {
+    return "Compiler.queue";
+  }
+  static const char* description() {
+    return "Print methods queued for compilation.";
+  }
+  static const char* impact() {
+    return "Low";
+  }
+  static const JavaPermission permission() {
+    JavaPermission p = {"java.lang.management.ManagementPermission",
+                        "monitor", NULL};
+    return p;
+  }
+  static int num_arguments() { return 0; }
+  virtual void execute(DCmdSource source, TRAPS);
+};
+
+class CodeListDCmd : public DCmd {
+public:
+  CodeListDCmd(outputStream* output, bool heap) : DCmd(output, heap) {}
+  static const char* name() {
+    return "Compiler.codelist";
+  }
+  static const char* description() {
+    return "Print all compiled methods in code cache that are alive";
+  }
+  static const char* impact() {
+    return "Medium";
+  }
+  static const JavaPermission permission() {
+    JavaPermission p = {"java.lang.management.ManagementPermission",
+                        "monitor", NULL};
+    return p;
+  }
+  static int num_arguments() { return 0; }
+  virtual void execute(DCmdSource source, TRAPS);
+};
+
+
+class CodeCacheDCmd : public DCmd {
+public:
+  CodeCacheDCmd(outputStream* output, bool heap) : DCmd(output, heap) {}
+  static const char* name() {
+    return "Compiler.codecache";
+  }
+  static const char* description() {
+    return "Print code cache layout and bounds.";
+  }
+  static const char* impact() {
+    return "Low";
+  }
+  static const JavaPermission permission() {
+    JavaPermission p = {"java.lang.management.ManagementPermission",
+                        "monitor", NULL};
+    return p;
+  }
+  static int num_arguments() { return 0; }
+  virtual void execute(DCmdSource source, TRAPS);
+};
+
+class CompilerDirectivesPrintDCmd : public DCmd {
+public:
+  CompilerDirectivesPrintDCmd(outputStream* output, bool heap) : DCmd(output, heap) {}
+  static const char* name() {
+    return "Compiler.directives_print";
+  }
+  static const char* description() {
+    return "Print all active compiler directives.";
+  }
+  static const char* impact() {
+    return "Low";
+  }
+  static const JavaPermission permission() {
+    JavaPermission p = {"java.lang.management.ManagementPermission",
+                        "monitor", NULL};
+    return p;
+  }
+  static int num_arguments() { return 0; }
+  virtual void execute(DCmdSource source, TRAPS);
+};
+
+class CompilerDirectivesRemoveDCmd : public DCmd {
+public:
+  CompilerDirectivesRemoveDCmd(outputStream* output, bool heap) : DCmd(output, heap) {}
+  static const char* name() {
+    return "Compiler.directives_remove";
+  }
+  static const char* description() {
+    return "Remove latest added compiler directive.";
+  }
+  static const char* impact() {
+    return "Low";
+  }
+  static const JavaPermission permission() {
+    JavaPermission p = {"java.lang.management.ManagementPermission",
+                        "monitor", NULL};
+    return p;
+  }
+  static int num_arguments() { return 0; }
+  virtual void execute(DCmdSource source, TRAPS);
+};
+
+class CompilerDirectivesAddDCmd : public DCmdWithParser {
+protected:
+  DCmdArgument<char*> _filename;
+public:
+  CompilerDirectivesAddDCmd(outputStream* output, bool heap);
+  static const char* name() {
+    return "Compiler.directives_add";
+  }
+  static const char* description() {
+    return "Add compiler directives from file.";
+  }
+  static const char* impact() {
+    return "Low";
+  }
+  static const JavaPermission permission() {
+    JavaPermission p = {"java.lang.management.ManagementPermission",
+                        "monitor", NULL};
+    return p;
+  }
+  static int num_arguments();
+  virtual void execute(DCmdSource source, TRAPS);
+};
+
+class CompilerDirectivesClearDCmd : public DCmd {
+public:
+  CompilerDirectivesClearDCmd(outputStream* output, bool heap) : DCmd(output, heap) {}
+  static const char* name() {
+    return "Compiler.directives_clear";
+  }
+  static const char* description() {
+    return "Remove all compiler directives.";
+  }
+  static const char* impact() {
+    return "Low";
+  }
+  static const JavaPermission permission() {
+    JavaPermission p = {"java.lang.management.ManagementPermission",
+                        "monitor", NULL};
+    return p;
+  }
+  static int num_arguments() { return 0; }
+  virtual void execute(DCmdSource source, TRAPS);
+};
+
+///////////////////////////////////////////////////////////////////////
+//
+// jcmd command support for symbol table, string table and system dictionary dumping:
+//   VM.symboltable -verbose: for dumping the symbol table
+//   VM.stringtable -verbose: for dumping the string table
+//   VM.systemdictionary -verbose: for dumping the system dictionary table
+//
+class VM_DumpHashtable : public VM_Operation {
+private:
+  outputStream* _out;
+  int _which;
+  bool _verbose;
+public:
+  enum {
+    DumpSymbols = 1 << 0,
+    DumpStrings = 1 << 1,
+    DumpSysDict = 1 << 2  // not implemented yet
+  };
+  VM_DumpHashtable(outputStream* out, int which, bool verbose) {
+    _out = out;
+    _which = which;
+    _verbose = verbose;
+  }
+
+  virtual VMOp_Type type() const { return VMOp_DumpHashtable; }
+
+  virtual void doit() {
+    switch (_which) {
+    case DumpSymbols:
+      SymbolTable::dump(_out, _verbose);
+      break;
+    case DumpStrings:
+      StringTable::dump(_out, _verbose);
+      break;
+    case DumpSysDict:
+      SystemDictionary::dump(_out, _verbose);
+      break;
+    default:
+      ShouldNotReachHere();
+    }
+  }
+};
+
+class SymboltableDCmd : public DCmdWithParser {
+protected:
+  DCmdArgument<bool> _verbose;
+public:
+  SymboltableDCmd(outputStream* output, bool heap);
+  static const char* name() {
+    return "VM.symboltable";
+  }
+  static const char* description() {
+    return "Dump symbol table.";
+  }
+  static const char* impact() {
+    return "Medium: Depends on Java content.";
+  }
+  static const JavaPermission permission() {
+    JavaPermission p = {"java.lang.management.ManagementPermission",
+                        "monitor", NULL};
+    return p;
+  }
+  static int num_arguments();
+  virtual void execute(DCmdSource source, TRAPS);
+};
+
+class StringtableDCmd : public DCmdWithParser {
+protected:
+  DCmdArgument<bool> _verbose;
+public:
+  StringtableDCmd(outputStream* output, bool heap);
+  static const char* name() {
+    return "VM.stringtable";
+  }
+  static const char* description() {
+    return "Dump string table.";
+  }
+  static const char* impact() {
+    return "Medium: Depends on Java content.";
+  }
+  static const JavaPermission permission() {
+    JavaPermission p = {"java.lang.management.ManagementPermission",
+                        "monitor", NULL};
+    return p;
+  }
+  static int num_arguments();
+  virtual void execute(DCmdSource source, TRAPS);
+};
+
+class SystemDictionaryDCmd : public DCmdWithParser {
+protected:
+  DCmdArgument<bool> _verbose;
+public:
+  SystemDictionaryDCmd(outputStream* output, bool heap);
+  static const char* name() {
+    return "VM.systemdictionary";
+  }
+  static const char* description() {
+    return "Prints the statistics for dictionary hashtable sizes and bucket length";
+  }
+  static const char* impact() {
+      return "Medium: Depends on Java content.";
+  }
+  static const JavaPermission permission() {
+    JavaPermission p = {"java.lang.management.ManagementPermission",
+                        "monitor", NULL};
+    return p;
+  }
+  static int num_arguments();
+  virtual void execute(DCmdSource source, TRAPS);
+};
+
+#endif // SHARE_VM_SERVICES_DIAGNOSTICCOMMAND_HPP