hotspot/src/share/vm/services/management.hpp
author dsamersoff
Wed, 25 Jan 2012 21:10:08 +0400
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7132515: Add dcmd to manage UnlockingCommercialFeature flag Summary: Added dcmd to unlock or check status of UnlockingCommercialFeature flag Reviewed-by: fparain, rottenha
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/*
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 * Copyright (c) 2003, 2011, Oracle and/or its affiliates. All rights reserved.
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * This code is free software; you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License version 2 only, as
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 * published by the Free Software Foundation.
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 *
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * accompanied this code).
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 *
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 * You should have received a copy of the GNU General Public License version
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 *
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 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 * or visit www.oracle.com if you need additional information or have any
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 * questions.
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 *
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 */
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#ifndef SHARE_VM_SERVICES_MANAGEMENT_HPP
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#define SHARE_VM_SERVICES_MANAGEMENT_HPP
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#include "memory/allocation.hpp"
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#include "runtime/handles.hpp"
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#include "runtime/timer.hpp"
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#include "services/jmm.h"
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class OopClosure;
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class ThreadSnapshot;
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class Management : public AllStatic {
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private:
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  static PerfVariable*      _begin_vm_creation_time;
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  static PerfVariable*      _end_vm_creation_time;
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  static PerfVariable*      _vm_init_done_time;
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  static jmmOptionalSupport _optional_support;
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  static TimeStamp          _stamp; // Timestamp since vm init done time
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  // Management klasses
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  static klassOop           _sensor_klass;
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  static klassOop           _threadInfo_klass;
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  static klassOop           _memoryUsage_klass;
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  static klassOop           _memoryPoolMXBean_klass;
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  static klassOop           _memoryManagerMXBean_klass;
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  static klassOop           _garbageCollectorMXBean_klass;
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  static klassOop           _managementFactory_klass;
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  static klassOop           _garbageCollectorImpl_klass;
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  static klassOop           _gcInfo_klass;
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  static klassOop load_and_initialize_klass(Symbol* sh, TRAPS);
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public:
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  static void init();
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  static void initialize(TRAPS);
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  static jlong ticks_to_ms(jlong ticks);
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  static jlong timestamp();
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  static void  oops_do(OopClosure* f);
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  static void* get_jmm_interface(int version);
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  static void  get_optional_support(jmmOptionalSupport* support);
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  static void get_loaded_classes(JavaThread* cur_thread, GrowableArray<KlassHandle>* klass_handle_array);
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  static void  record_vm_startup_time(jlong begin, jlong duration);
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  static void  record_vm_init_completed() {
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    // Initialize the timestamp to get the current time
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    _vm_init_done_time->set_value(os::javaTimeMillis());
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    // Update the timestamp to the vm init done time
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    _stamp.update();
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  }
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  static jlong begin_vm_creation_time() {
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    return _begin_vm_creation_time->get_value();
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  }
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  static jlong vm_init_done_time() {
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    return _vm_init_done_time->get_value();
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  }
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  // methods to return a klassOop.
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  static klassOop java_lang_management_ThreadInfo_klass(TRAPS);
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  static klassOop java_lang_management_MemoryUsage_klass(TRAPS);
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  static klassOop java_lang_management_MemoryPoolMXBean_klass(TRAPS);
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  static klassOop java_lang_management_MemoryManagerMXBean_klass(TRAPS);
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  static klassOop java_lang_management_GarbageCollectorMXBean_klass(TRAPS);
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  static klassOop sun_management_Sensor_klass(TRAPS);
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  static klassOop sun_management_ManagementFactory_klass(TRAPS);
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  static klassOop sun_management_GarbageCollectorImpl_klass(TRAPS);
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  static klassOop com_sun_management_GcInfo_klass(TRAPS);
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  static instanceOop create_thread_info_instance(ThreadSnapshot* snapshot, TRAPS);
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  static instanceOop create_thread_info_instance(ThreadSnapshot* snapshot, objArrayHandle monitors_array, typeArrayHandle depths_array, objArrayHandle synchronizers_array, TRAPS);
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};
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class TraceVmCreationTime : public StackObj {
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private:
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  TimeStamp _timer;
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  jlong     _begin_time;
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public:
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  TraceVmCreationTime() {}
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  ~TraceVmCreationTime() {}
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  void start()
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  { _timer.update_to(0); _begin_time = os::javaTimeMillis(); }
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  /**
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   * Only call this if initialization completes successfully; it will
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   * crash if PerfMemory_exit() has already been called (usually by
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   * os::shutdown() when there was an initialization failure).
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   */
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  void end()
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  { Management::record_vm_startup_time(_begin_time, _timer.milliseconds()); }
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};
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#endif // SHARE_VM_SERVICES_MANAGEMENT_HPP