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annotate src/share/vm/services/management.hpp @ 8733:9def4075da6d

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8008079: G1: Add nextObject routine to CMBitMapRO and replace nextWord Summary: Update the task local finger to the start of the next object when marking aborts, in order to avoid the redundant scanning of all 0's when the marking task restarts, if otherwise updating to the next word. In addition, reuse the routine nextObject() in routine iterate(). Reviewed-by: johnc, ysr Contributed-by: tamao <tao.mao@oracle.com>
author tamao
date Tue, 05 Mar 2013 15:36:56 -0800
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children 31a4e55f8c9d
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1 /*
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2 * Copyright (c) 2003, 2012, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 *
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23 */
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24
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25 #ifndef SHARE_VM_SERVICES_MANAGEMENT_HPP
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26 #define SHARE_VM_SERVICES_MANAGEMENT_HPP
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27
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28 #include "memory/allocation.hpp"
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29 #include "runtime/handles.hpp"
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30 #include "runtime/timer.hpp"
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31 #include "services/jmm.h"
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32
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33 class OopClosure;
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34 class ThreadSnapshot;
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35
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36 class Management : public AllStatic {
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37 private:
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38 static PerfVariable* _begin_vm_creation_time;
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39 static PerfVariable* _end_vm_creation_time;
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40 static PerfVariable* _vm_init_done_time;
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41 static jmmOptionalSupport _optional_support;
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42 static TimeStamp _stamp; // Timestamp since vm init done time
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43
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44 // Management klasses
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45 static Klass* _sensor_klass;
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46 static Klass* _threadInfo_klass;
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47 static Klass* _memoryUsage_klass;
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48 static Klass* _memoryPoolMXBean_klass;
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49 static Klass* _memoryManagerMXBean_klass;
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50 static Klass* _garbageCollectorMXBean_klass;
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51 static Klass* _managementFactory_klass;
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52 static Klass* _garbageCollectorImpl_klass;
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53 static Klass* _gcInfo_klass;
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54
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55 static Klass* load_and_initialize_klass(Symbol* sh, TRAPS);
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56
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57 public:
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58 static void init();
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59 static void initialize(TRAPS);
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60
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61 static jlong ticks_to_ms(jlong ticks) NOT_MANAGEMENT_RETURN_(0L);
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62 static jlong timestamp() NOT_MANAGEMENT_RETURN_(0L);
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63
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64 static void oops_do(OopClosure* f) NOT_MANAGEMENT_RETURN;
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65 static void* get_jmm_interface(int version);
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66 static void get_optional_support(jmmOptionalSupport* support);
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67
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68 static void get_loaded_classes(JavaThread* cur_thread, GrowableArray<KlassHandle>* klass_handle_array);
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69
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70 static void record_vm_startup_time(jlong begin, jlong duration)
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71 NOT_MANAGEMENT_RETURN;
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72 static void record_vm_init_completed() {
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73 // Initialize the timestamp to get the current time
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74 _vm_init_done_time->set_value(os::javaTimeMillis());
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75
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76 // Update the timestamp to the vm init done time
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77 _stamp.update();
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78 }
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79
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80 static jlong begin_vm_creation_time() {
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81 return _begin_vm_creation_time->get_value();
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82 }
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83 static jlong vm_init_done_time() {
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84 return _vm_init_done_time->get_value();
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85 }
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86
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87 // methods to return a Klass*.
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88 static Klass* java_lang_management_ThreadInfo_klass(TRAPS);
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89 static Klass* java_lang_management_MemoryUsage_klass(TRAPS)
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90 NOT_MANAGEMENT_RETURN_(NULL);
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91 static Klass* java_lang_management_MemoryPoolMXBean_klass(TRAPS);
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92 static Klass* java_lang_management_MemoryManagerMXBean_klass(TRAPS);
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93 static Klass* java_lang_management_GarbageCollectorMXBean_klass(TRAPS);
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94 static Klass* sun_management_Sensor_klass(TRAPS)
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95 NOT_MANAGEMENT_RETURN_(NULL);
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96 static Klass* sun_management_ManagementFactory_klass(TRAPS)
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97 NOT_MANAGEMENT_RETURN_(NULL);
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98 static Klass* sun_management_GarbageCollectorImpl_klass(TRAPS)
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99 NOT_MANAGEMENT_RETURN_(NULL);
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100 static Klass* com_sun_management_GcInfo_klass(TRAPS)
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101 NOT_MANAGEMENT_RETURN_(NULL);
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102
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103 static instanceOop create_thread_info_instance(ThreadSnapshot* snapshot, TRAPS);
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104 static instanceOop create_thread_info_instance(ThreadSnapshot* snapshot, objArrayHandle monitors_array, typeArrayHandle depths_array, objArrayHandle synchronizers_array, TRAPS);
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105 };
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106
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107 class TraceVmCreationTime : public StackObj {
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108 private:
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109 TimeStamp _timer;
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110 jlong _begin_time;
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111
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112 public:
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113 TraceVmCreationTime() {}
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114 ~TraceVmCreationTime() {}
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115
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116 void start()
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117 { _timer.update_to(0); _begin_time = os::javaTimeMillis(); }
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118
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119 /**
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120 * Only call this if initialization completes successfully; it will
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121 * crash if PerfMemory_exit() has already been called (usually by
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122 * os::shutdown() when there was an initialization failure).
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123 */
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124 void end()
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125 { Management::record_vm_startup_time(_begin_time, _timer.milliseconds()); }
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126
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127 };
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128
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129 #endif // SHARE_VM_SERVICES_MANAGEMENT_HPP