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* _gcInfo_klass;
54
55 static Klass* load_and_initialize_klass(Symbol* sh, TRAPS);
56
57 public:
58 static void init();
59 static void initialize(TRAPS);
60
61 static jlong ticks_to_ms(jlong ticks);
62 static jlong timestamp();
63
64 static void oops_do(OopClosure* f);
65 static void* get_jmm_interface(int version);
66 static void get_optional_support(jmmOptionalSupport* support);
67
68 static void get_loaded_classes(JavaThread* cur_thread, GrowableArray<KlassHandle>* klass_handle_array);
69
70 static void record_vm_startup_time(jlong begin, jlong duration);
71 static void record_vm_init_completed() {
72 // Initialize the timestamp to get the current time
73 _vm_init_done_time->set_value(os::javaTimeMillis());
74
75 // Update the timestamp to the vm init done time
76 _stamp.update();
77 }
78
79 static jlong begin_vm_creation_time() {
80 return _begin_vm_creation_time->get_value();
81 }
82 static jlong vm_init_done_time() {
83 return _vm_init_done_time->get_value();
84 }
85
86 // methods to return a Klass*.
87 static Klass* java_lang_management_ThreadInfo_klass(TRAPS);
88 static Klass* java_lang_management_MemoryUsage_klass(TRAPS);
89 static Klass* java_lang_management_MemoryPoolMXBean_klass(TRAPS);
90 static Klass* java_lang_management_MemoryManagerMXBean_klass(TRAPS);
91 static Klass* java_lang_management_GarbageCollectorMXBean_klass(TRAPS);
92 static Klass* sun_management_Sensor_klass(TRAPS);
93 static Klass* sun_management_ManagementFactory_klass(TRAPS);
94 static Klass* sun_management_GarbageCollectorImpl_klass(TRAPS);
95 static Klass* com_sun_management_GcInfo_klass(TRAPS);
96
97 static instanceOop create_thread_info_instance(ThreadSnapshot* snapshot, TRAPS);
98 static instanceOop create_thread_info_instance(ThreadSnapshot* snapshot, objArrayHandle monitors_array, typeArrayHandle depths_array, objArrayHandle synchronizers_array, TRAPS);
99 };
100
101 class TraceVmCreationTime : public StackObj {
102 private:
103 TimeStamp _timer;
104 jlong _begin_time;
105
106 public:
107 TraceVmCreationTime() {}
108 ~TraceVmCreationTime() {}
109
110 void start()
111 { _timer.update_to(0); _begin_time = os::javaTimeMillis(); }
112
113 /**
114 * Only call this if initialization completes successfully; it will
115 * crash if PerfMemory_exit() has already been called (usually by
116 * os::shutdown() when there was an initialization failure).
117 */
118 void end()
119 { Management::record_vm_startup_time(_begin_time, _timer.milliseconds()); }
120
121 };
122
123 #endif // SHARE_VM_SERVICES_MANAGEMENT_HPP