1 /* 2 * Copyright (c) 2003, 2010, 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 klassOop _sensor_klass; 46 static klassOop _threadInfo_klass; 47 static klassOop _memoryUsage_klass; 48 static klassOop _memoryPoolMXBean_klass; 49 static klassOop _memoryManagerMXBean_klass; 50 static klassOop _garbageCollectorMXBean_klass; 51 static klassOop _managementFactory_klass; 52 53 static klassOop load_and_initialize_klass(symbolHandle sh, TRAPS); 54 55 public: 56 static void init(); 57 static void initialize(TRAPS); 58 59 static jlong ticks_to_ms(jlong ticks); 60 static jlong timestamp(); 61 62 static void oops_do(OopClosure* f); 63 static void* get_jmm_interface(int version); 64 static void get_optional_support(jmmOptionalSupport* support); 65 66 static void get_loaded_classes(JavaThread* cur_thread, GrowableArray<KlassHandle>* klass_handle_array); 67 68 static void record_vm_startup_time(jlong begin, jlong duration); 69 static void record_vm_init_completed() { 70 // Initialize the timestamp to get the current time 71 _vm_init_done_time->set_value(os::javaTimeMillis()); 72 73 // Update the timestamp to the vm init done time 74 _stamp.update(); 75 } 76 77 static jlong vm_init_done_time() { 78 return _vm_init_done_time->get_value(); 79 } 80 81 // methods to return a klassOop. 82 static klassOop java_lang_management_ThreadInfo_klass(TRAPS); 83 static klassOop java_lang_management_MemoryUsage_klass(TRAPS); 84 static klassOop java_lang_management_MemoryPoolMXBean_klass(TRAPS); 85 static klassOop java_lang_management_MemoryManagerMXBean_klass(TRAPS); 86 static klassOop java_lang_management_GarbageCollectorMXBean_klass(TRAPS); 87 static klassOop sun_management_Sensor_klass(TRAPS); 88 static klassOop sun_management_ManagementFactory_klass(TRAPS); 89 90 static instanceOop create_thread_info_instance(ThreadSnapshot* snapshot, TRAPS); 91 static instanceOop create_thread_info_instance(ThreadSnapshot* snapshot, objArrayHandle monitors_array, typeArrayHandle depths_array, objArrayHandle synchronizers_array, TRAPS); 92 }; 93 94 class TraceVmCreationTime : public StackObj { 95 private: 96 TimeStamp _timer; 97 jlong _begin_time; 98 99 public: 100 TraceVmCreationTime() {} 101 ~TraceVmCreationTime() {} 102 103 void start() 104 { _timer.update_to(0); _begin_time = os::javaTimeMillis(); } 105 106 /** 107 * Only call this if initialization completes successfully; it will 108 * crash if PerfMemory_exit() has already been called (usually by 109 * os::shutdown() when there was an initialization failure). 110 */ 111 void end() 112 { Management::record_vm_startup_time(_begin_time, _timer.milliseconds()); } 113 114 }; 115 116 #endif // SHARE_VM_SERVICES_MANAGEMENT_HPP