management.hpp revision 1472:c18cbe5936b8 
1/*
2 * Copyright (c) 2003, 2005, 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
25class OopClosure;
26class ThreadSnapshot;
27
28class Management : public AllStatic {
29private:
30  static PerfVariable*      _begin_vm_creation_time;
31  static PerfVariable*      _end_vm_creation_time;
32  static PerfVariable*      _vm_init_done_time;
33  static jmmOptionalSupport _optional_support;
34  static TimeStamp          _stamp; // Timestamp since vm init done time
35
36  // Management klasses
37  static klassOop           _sensor_klass;
38  static klassOop           _threadInfo_klass;
39  static klassOop           _memoryUsage_klass;
40  static klassOop           _memoryPoolMXBean_klass;
41  static klassOop           _memoryManagerMXBean_klass;
42  static klassOop           _garbageCollectorMXBean_klass;
43  static klassOop           _managementFactory_klass;
44
45  static klassOop load_and_initialize_klass(symbolHandle sh, TRAPS);
46
47public:
48  static void init();
49  static void initialize(TRAPS);
50
51  static jlong ticks_to_ms(jlong ticks);
52  static jlong timestamp();
53
54  static void  oops_do(OopClosure* f);
55  static void* get_jmm_interface(int version);
56  static void  get_optional_support(jmmOptionalSupport* support);
57
58  static void get_loaded_classes(JavaThread* cur_thread, GrowableArray<KlassHandle>* klass_handle_array);
59
60  static void  record_vm_startup_time(jlong begin, jlong duration);
61  static void  record_vm_init_completed() {
62    // Initialize the timestamp to get the current time
63    _vm_init_done_time->set_value(os::javaTimeMillis());
64
65    // Update the timestamp to the vm init done time
66    _stamp.update();
67  }
68
69  static jlong vm_init_done_time() {
70    return _vm_init_done_time->get_value();
71  }
72
73  // methods to return a klassOop.
74  static klassOop java_lang_management_ThreadInfo_klass(TRAPS);
75  static klassOop java_lang_management_MemoryUsage_klass(TRAPS);
76  static klassOop java_lang_management_MemoryPoolMXBean_klass(TRAPS);
77  static klassOop java_lang_management_MemoryManagerMXBean_klass(TRAPS);
78  static klassOop java_lang_management_GarbageCollectorMXBean_klass(TRAPS);
79  static klassOop sun_management_Sensor_klass(TRAPS);
80  static klassOop sun_management_ManagementFactory_klass(TRAPS);
81
82  static instanceOop create_thread_info_instance(ThreadSnapshot* snapshot, TRAPS);
83  static instanceOop create_thread_info_instance(ThreadSnapshot* snapshot, objArrayHandle monitors_array, typeArrayHandle depths_array, objArrayHandle synchronizers_array, TRAPS);
84};
85
86class TraceVmCreationTime : public StackObj {
87private:
88  TimeStamp _timer;
89  jlong     _begin_time;
90
91public:
92  TraceVmCreationTime() {}
93  ~TraceVmCreationTime() {}
94
95  void start()
96  { _timer.update_to(0); _begin_time = os::javaTimeMillis(); }
97
98  /**
99   * Only call this if initialization completes successfully; it will
100   * crash if PerfMemory_exit() has already been called (usually by
101   * os::shutdown() when there was an initialization failure).
102   */
103  void end()
104  { Management::record_vm_startup_time(_begin_time, _timer.milliseconds()); }
105
106};
107