1 /*
2 * Copyright (c) 2003, 2023, 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_SERVICES_MANAGEMENT_HPP
26 #define SHARE_SERVICES_MANAGEMENT_HPP
27
28 #include "jmm.h"
29 #include "memory/allocation.hpp"
30 #include "runtime/handles.hpp"
31 #include "runtime/os.hpp"
32 #include "runtime/perfData.hpp"
33 #include "runtime/timer.hpp"
34
35 class OopClosure;
36 class ThreadSnapshot;
37
38 class Management : public AllStatic {
39 private:
40 static PerfVariable* _begin_vm_creation_time;
41 static PerfVariable* _end_vm_creation_time;
42 static PerfVariable* _vm_init_done_time;
43 static jmmOptionalSupport _optional_support;
44 static TimeStamp _stamp; // Timestamp since vm init done time
45
46 // Management klasses
47 static InstanceKlass* _diagnosticCommandImpl_klass;
48 static InstanceKlass* _garbageCollectorExtImpl_klass;
49 static InstanceKlass* _garbageCollectorMXBean_klass;
50 static InstanceKlass* _gcInfo_klass;
51 static InstanceKlass* _managementFactoryHelper_klass;
52 static InstanceKlass* _memoryManagerMXBean_klass;
53 static InstanceKlass* _memoryPoolMXBean_klass;
54 static InstanceKlass* _memoryUsage_klass;
55 static InstanceKlass* _sensor_klass;
56 static InstanceKlass* _threadInfo_klass;
57 static InstanceKlass* load_and_initialize_klass(Symbol* sh, TRAPS);
58 static InstanceKlass* load_and_initialize_klass_or_null(Symbol* sh, TRAPS);
59 static InstanceKlass* initialize_klass(Klass* k, TRAPS);
60
61 public:
62 static void init();
63 static void initialize(TRAPS);
64
65 static jlong ticks_to_ms(jlong ticks) NOT_MANAGEMENT_RETURN_(0L);
66 static jlong ticks_to_us(jlong ticks) NOT_MANAGEMENT_RETURN_(0L);
67 static jlong timestamp() NOT_MANAGEMENT_RETURN_(0L);
68
69 static void* get_jmm_interface(int version);
70 static void get_optional_support(jmmOptionalSupport* support);
71
72 static void record_vm_startup_time(jlong begin, jlong duration)
73 NOT_MANAGEMENT_RETURN;
74 static void record_vm_init_completed() NOT_MANAGEMENT_RETURN;
75
76 static jlong begin_vm_creation_time() NOT_MANAGEMENT_RETURN_(0L);
77 static jlong vm_init_done_time() NOT_MANAGEMENT_RETURN_(0L);
78
79 // methods to return a Klass*.
80 static InstanceKlass* java_lang_management_ThreadInfo_klass(TRAPS);
81 static InstanceKlass* java_lang_management_MemoryUsage_klass(TRAPS)
82 NOT_MANAGEMENT_RETURN_(nullptr);
83 static InstanceKlass* java_lang_management_MemoryPoolMXBean_klass(TRAPS);
84 static InstanceKlass* java_lang_management_MemoryManagerMXBean_klass(TRAPS);
85 static InstanceKlass* java_lang_management_GarbageCollectorMXBean_klass(TRAPS);
86 static InstanceKlass* sun_management_ManagementFactoryHelper_klass(TRAPS)
87 NOT_MANAGEMENT_RETURN_(nullptr);
88 static InstanceKlass* sun_management_Sensor_klass(TRAPS)
89 NOT_MANAGEMENT_RETURN_(nullptr);
90 static InstanceKlass* com_sun_management_internal_GarbageCollectorExtImpl_klass(TRAPS)
91 NOT_MANAGEMENT_RETURN_(nullptr);
92 static InstanceKlass* com_sun_management_GcInfo_klass(TRAPS)
93 NOT_MANAGEMENT_RETURN_(nullptr);
94 static InstanceKlass* com_sun_management_internal_DiagnosticCommandImpl_klass(TRAPS)
95 NOT_MANAGEMENT_RETURN_(nullptr);
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 jlong begin_time() const {
114 return _begin_time;
115 }
116
117 /**
118 * Only call this if initialization completes successfully; it will
119 * crash if PerfMemory_exit() has already been called (usually by
120 * os::shutdown() when there was an initialization failure).
121 */
122 void end()
123 { Management::record_vm_startup_time(_begin_time, _timer.milliseconds()); }
124
125 };
126
127 #endif // SHARE_SERVICES_MANAGEMENT_HPP