1 /*
   2  * Copyright (c) 2003, 2012, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #ifndef SHARE_VM_SERVICES_MANAGEMENT_HPP
  26 #define SHARE_VM_SERVICES_MANAGEMENT_HPP
  27 
  28 #include "memory/allocation.hpp"
  29 #include "runtime/handles.hpp"
  30 #include "runtime/timer.hpp"
  31 #include "services/jmm.h"
  32 
  33 class OopClosure;
  34 class ThreadSnapshot;
  35 
  36 class Management : public AllStatic {
  37 private:
  38   static PerfVariable*      _begin_vm_creation_time;
  39   static PerfVariable*      _end_vm_creation_time;
  40   static PerfVariable*      _vm_init_done_time;
  41   static jmmOptionalSupport _optional_support;
  42   static TimeStamp          _stamp; // Timestamp since vm init done time
  43 
  44   // Management klasses
  45   static Klass*             _sensor_klass;
  46   static Klass*             _threadInfo_klass;
  47   static Klass*             _memoryUsage_klass;
  48   static Klass*             _memoryPoolMXBean_klass;
  49   static Klass*             _memoryManagerMXBean_klass;
  50   static Klass*             _garbageCollectorMXBean_klass;
  51   static Klass*             _managementFactory_klass;
  52   static Klass*             _garbageCollectorImpl_klass;
  53   static Klass*             _diagnosticCommandImpl_klass;
  54   static Klass*             _managementFactoryHelper_klass;
  55   static Klass*             _gcInfo_klass;
  56 
  57 
  58   static Klass* load_and_initialize_klass(Symbol* sh, TRAPS);
  59 
  60 public:
  61   static void init();
  62   static void initialize(TRAPS);
  63 
  64   static jlong ticks_to_ms(jlong ticks) NOT_MANAGEMENT_RETURN_(0L);
  65   static jlong timestamp() NOT_MANAGEMENT_RETURN_(0L);
  66 
  67   static void  oops_do(OopClosure* f) NOT_MANAGEMENT_RETURN;
  68   static void* get_jmm_interface(int version);
  69   static void  get_optional_support(jmmOptionalSupport* support);
  70 
  71   static void get_loaded_classes(JavaThread* cur_thread, GrowableArray<KlassHandle>* klass_handle_array);
  72 
  73   static void  record_vm_startup_time(jlong begin, jlong duration)
  74       NOT_MANAGEMENT_RETURN;
  75   static void  record_vm_init_completed() {
  76     // Initialize the timestamp to get the current time
  77     _vm_init_done_time->set_value(os::javaTimeMillis());
  78 
  79     // Update the timestamp to the vm init done time
  80     _stamp.update();
  81   }
  82 
  83   static jlong begin_vm_creation_time() {
  84     return _begin_vm_creation_time->get_value();
  85   }
  86   static jlong vm_init_done_time() {
  87     return _vm_init_done_time->get_value();
  88   }
  89 
  90   // methods to return a Klass*.
  91   static Klass* java_lang_management_ThreadInfo_klass(TRAPS);
  92   static Klass* java_lang_management_MemoryUsage_klass(TRAPS)
  93       NOT_MANAGEMENT_RETURN_(NULL);
  94   static Klass* java_lang_management_MemoryPoolMXBean_klass(TRAPS);
  95   static Klass* java_lang_management_MemoryManagerMXBean_klass(TRAPS);
  96   static Klass* java_lang_management_GarbageCollectorMXBean_klass(TRAPS);
  97   static Klass* sun_management_Sensor_klass(TRAPS)
  98       NOT_MANAGEMENT_RETURN_(NULL);
  99   static Klass* sun_management_ManagementFactory_klass(TRAPS)
 100       NOT_MANAGEMENT_RETURN_(NULL);
 101   static Klass* sun_management_GarbageCollectorImpl_klass(TRAPS)
 102       NOT_MANAGEMENT_RETURN_(NULL);
 103   static Klass* com_sun_management_GcInfo_klass(TRAPS)
 104       NOT_MANAGEMENT_RETURN_(NULL);
 105   static Klass* sun_management_DiagnosticCommandImpl_klass(TRAPS);
 106   static Klass* sun_management_ManagementFactoryHelper_klass(TRAPS);
 107 
 108   static instanceOop create_thread_info_instance(ThreadSnapshot* snapshot, TRAPS);
 109   static instanceOop create_thread_info_instance(ThreadSnapshot* snapshot, objArrayHandle monitors_array, typeArrayHandle depths_array, objArrayHandle synchronizers_array, TRAPS);
 110 };
 111 
 112 class TraceVmCreationTime : public StackObj {
 113 private:
 114   TimeStamp _timer;
 115   jlong     _begin_time;
 116 
 117 public:
 118   TraceVmCreationTime() {}
 119   ~TraceVmCreationTime() {}
 120 
 121   void start()
 122   { _timer.update_to(0); _begin_time = os::javaTimeMillis(); }
 123 
 124   /**
 125    * Only call this if initialization completes successfully; it will
 126    * crash if PerfMemory_exit() has already been called (usually by
 127    * os::shutdown() when there was an initialization failure).
 128    */
 129   void end()
 130   { Management::record_vm_startup_time(_begin_time, _timer.milliseconds()); }
 131 
 132 };
 133 
 134 #endif // SHARE_VM_SERVICES_MANAGEMENT_HPP