Mercurial > hg > truffle
annotate src/share/vm/services/gcNotifier.cpp @ 3758:e2ce15aa3daf
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author | never |
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date | Tue, 14 Jun 2011 15:20:55 -0700 |
parents | 78542e2b5e35 |
children | 87e40b34bc2b |
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1 /* |
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2 * Copyright (c) 2011, 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 #include "precompiled.hpp" |
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26 #include "classfile/systemDictionary.hpp" |
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27 #include "classfile/vmSymbols.hpp" |
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28 #include "oops/oop.inline.hpp" |
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29 #include "runtime/interfaceSupport.hpp" |
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30 #include "runtime/java.hpp" |
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31 #include "runtime/javaCalls.hpp" |
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32 #include "runtime/mutex.hpp" |
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33 #include "runtime/mutexLocker.hpp" |
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34 #include "services/gcNotifier.hpp" |
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35 #include "services/management.hpp" |
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36 #include "services/memoryService.hpp" |
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37 #include "memoryManager.hpp" |
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38 #include "memory/oopFactory.hpp" |
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39 |
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40 GCNotificationRequest *GCNotifier::first_request = NULL; |
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41 GCNotificationRequest *GCNotifier::last_request = NULL; |
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42 |
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43 void GCNotifier::pushNotification(GCMemoryManager *mgr, const char *action, const char *cause) { |
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44 // Make a copy of the last GC statistics |
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45 // GC may occur between now and the creation of the notification |
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46 int num_pools = MemoryService::num_memory_pools(); |
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47 GCStatInfo* stat = new GCStatInfo(num_pools); |
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48 mgr->get_last_gc_stat(stat); |
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49 GCNotificationRequest *request = new GCNotificationRequest(os::javaTimeMillis(),mgr,action,cause,stat); |
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50 addRequest(request); |
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51 } |
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52 |
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53 void GCNotifier::addRequest(GCNotificationRequest *request) { |
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54 MutexLockerEx ml(Service_lock, Mutex::_no_safepoint_check_flag); |
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55 if(first_request == NULL) { |
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56 first_request = request; |
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57 } else { |
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58 last_request->next = request; |
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59 } |
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60 last_request = request; |
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61 Service_lock->notify_all(); |
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62 } |
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63 |
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64 GCNotificationRequest *GCNotifier::getRequest() { |
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65 MutexLockerEx ml(Service_lock, Mutex::_no_safepoint_check_flag); |
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66 GCNotificationRequest *request = first_request; |
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67 if(first_request != NULL) { |
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68 first_request = first_request->next; |
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69 } |
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70 return request; |
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71 } |
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72 |
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73 bool GCNotifier::has_event() { |
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74 return first_request != NULL; |
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75 } |
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76 |
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77 static Handle getGcInfoBuilder(GCMemoryManager *gcManager,TRAPS) { |
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78 |
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79 klassOop k = Management::sun_management_GarbageCollectorImpl_klass(CHECK_NH); |
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80 instanceKlassHandle gcMBeanKlass (THREAD, k); |
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81 |
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82 instanceOop i = gcManager->get_memory_manager_instance(THREAD); |
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83 instanceHandle ih(THREAD, i); |
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84 |
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85 JavaValue result(T_OBJECT); |
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86 JavaCallArguments args(ih); |
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87 |
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88 JavaCalls::call_virtual(&result, |
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89 gcMBeanKlass, |
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90 vmSymbols::getGcInfoBuilder_name(), |
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91 vmSymbols::getGcInfoBuilder_signature(), |
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92 &args, |
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93 CHECK_NH); |
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94 return Handle(THREAD,(oop)result.get_jobject()); |
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95 |
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96 } |
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97 |
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98 static Handle createGcInfo(GCMemoryManager *gcManager, GCStatInfo *gcStatInfo,TRAPS) { |
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99 |
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100 // Fill the arrays of MemoryUsage objects with before and after GC |
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101 // per pool memory usage |
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102 |
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103 klassOop muKlass = Management::java_lang_management_MemoryUsage_klass(CHECK_NH); objArrayOop bu = oopFactory::new_objArray( muKlass,MemoryService::num_memory_pools(), CHECK_NH); |
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104 objArrayHandle usage_before_gc_ah(THREAD, bu); |
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105 objArrayOop au = oopFactory::new_objArray(muKlass,MemoryService::num_memory_pools(), CHECK_NH); |
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106 objArrayHandle usage_after_gc_ah(THREAD, au); |
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107 |
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108 for (int i = 0; i < MemoryService::num_memory_pools(); i++) { |
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109 Handle before_usage = MemoryService::create_MemoryUsage_obj(gcStatInfo->before_gc_usage_for_pool(i), CHECK_NH); |
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110 Handle after_usage; |
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111 |
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112 MemoryUsage u = gcStatInfo->after_gc_usage_for_pool(i); |
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113 if (u.max_size() == 0 && u.used() > 0) { |
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114 // If max size == 0, this pool is a survivor space. |
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115 // Set max size = -1 since the pools will be swapped after GC. |
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116 MemoryUsage usage(u.init_size(), u.used(), u.committed(), (size_t)-1); |
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117 after_usage = MemoryService::create_MemoryUsage_obj(usage, CHECK_NH); |
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118 } else { |
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119 after_usage = MemoryService::create_MemoryUsage_obj(u, CHECK_NH); |
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120 } |
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121 usage_before_gc_ah->obj_at_put(i, before_usage()); |
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122 usage_after_gc_ah->obj_at_put(i, after_usage()); |
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123 } |
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124 |
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125 // Current implementation only has 1 attribute (number of GC threads) |
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126 // The type is 'I' |
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127 objArrayOop extra_args_array = oopFactory::new_objArray(SystemDictionary::Integer_klass(), 1, CHECK_NH); |
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128 objArrayHandle extra_array (THREAD, extra_args_array); |
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129 klassOop itKlass= SystemDictionary::Integer_klass(); |
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130 instanceKlassHandle intK(THREAD, itKlass); |
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131 |
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132 instanceHandle extra_arg_val = intK->allocate_instance_handle(CHECK_NH); |
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133 |
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134 { |
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135 JavaValue res(T_VOID); |
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136 JavaCallArguments argsInt; |
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137 argsInt.push_oop(extra_arg_val); |
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138 argsInt.push_int(gcManager->num_gc_threads()); |
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139 |
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140 JavaCalls::call_special(&res, |
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141 intK, |
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142 vmSymbols::object_initializer_name(), |
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143 vmSymbols::int_void_signature(), |
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144 &argsInt, |
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145 CHECK_NH); |
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146 } |
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147 extra_array->obj_at_put(0,extra_arg_val()); |
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148 |
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149 klassOop gcInfoklass = Management::com_sun_management_GcInfo_klass(CHECK_NH); |
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150 instanceKlassHandle ik (THREAD,gcInfoklass); |
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151 |
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152 Handle gcInfo_instance = ik->allocate_instance_handle(CHECK_NH); |
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153 |
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154 JavaValue constructor_result(T_VOID); |
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155 JavaCallArguments constructor_args(16); |
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156 constructor_args.push_oop(gcInfo_instance); |
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157 constructor_args.push_oop(getGcInfoBuilder(gcManager,THREAD)); |
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158 constructor_args.push_long(gcStatInfo->gc_index()); |
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159 constructor_args.push_long(gcStatInfo->start_time()); |
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160 constructor_args.push_long(gcStatInfo->end_time()); |
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161 constructor_args.push_oop(usage_before_gc_ah); |
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162 constructor_args.push_oop(usage_after_gc_ah); |
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163 constructor_args.push_oop(extra_array); |
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164 |
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165 JavaCalls::call_special(&constructor_result, |
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166 ik, |
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167 vmSymbols::object_initializer_name(), |
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168 vmSymbols::com_sun_management_GcInfo_constructor_signature(), |
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169 &constructor_args, |
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170 CHECK_NH); |
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171 |
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172 return Handle(gcInfo_instance()); |
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173 } |
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174 |
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175 void GCNotifier::sendNotification(TRAPS) { |
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176 ResourceMark rm(THREAD); |
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177 GCNotificationRequest *request = getRequest(); |
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178 if(request != NULL) { |
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179 Handle objGcInfo = createGcInfo(request->gcManager,request->gcStatInfo,THREAD); |
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180 |
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181 Handle objName = java_lang_String::create_from_platform_dependent_str(request->gcManager->name(), CHECK); |
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182 Handle objAction = java_lang_String::create_from_platform_dependent_str(request->gcAction, CHECK); |
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183 Handle objCause = java_lang_String::create_from_platform_dependent_str(request->gcCause, CHECK); |
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184 |
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185 klassOop k = Management::sun_management_GarbageCollectorImpl_klass(CHECK); |
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186 instanceKlassHandle gc_mbean_klass (THREAD, k); |
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187 |
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188 instanceOop gc_mbean = request->gcManager->get_memory_manager_instance(THREAD); |
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189 instanceHandle gc_mbean_h(THREAD, gc_mbean); |
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190 if (!gc_mbean_h->is_a(k)) { |
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191 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), |
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192 "This GCMemoryManager doesn't have a GarbageCollectorMXBean"); |
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193 } |
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194 |
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195 JavaValue result(T_VOID); |
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196 JavaCallArguments args(gc_mbean_h); |
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197 args.push_long(request->timestamp); |
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198 args.push_oop(objName); |
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199 args.push_oop(objAction); |
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200 args.push_oop(objCause); |
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201 args.push_oop(objGcInfo); |
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202 |
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203 JavaCalls::call_virtual(&result, |
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204 gc_mbean_klass, |
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205 vmSymbols::createGCNotification_name(), |
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206 vmSymbols::createGCNotification_signature(), |
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207 &args, |
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208 CHECK); |
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209 if (HAS_PENDING_EXCEPTION) { |
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210 CLEAR_PENDING_EXCEPTION; |
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211 } |
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212 |
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213 delete request; |
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214 } |
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215 } |
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216 |