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1 /* |
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2 * Copyright 2003-2007 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
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20 * CA 95054 USA or visit www.sun.com if you need additional information or |
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21 * have any questions. |
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22 * |
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23 */ |
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24 |
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25 # include "incls/_precompiled.incl" |
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26 # include "incls/_management.cpp.incl" |
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27 |
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28 PerfVariable* Management::_begin_vm_creation_time = NULL; |
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29 PerfVariable* Management::_end_vm_creation_time = NULL; |
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30 PerfVariable* Management::_vm_init_done_time = NULL; |
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31 |
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32 klassOop Management::_sensor_klass = NULL; |
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33 klassOop Management::_threadInfo_klass = NULL; |
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34 klassOop Management::_memoryUsage_klass = NULL; |
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35 klassOop Management::_memoryPoolMXBean_klass = NULL; |
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36 klassOop Management::_memoryManagerMXBean_klass = NULL; |
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37 klassOop Management::_garbageCollectorMXBean_klass = NULL; |
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38 klassOop Management::_managementFactory_klass = NULL; |
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39 |
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40 jmmOptionalSupport Management::_optional_support = {0}; |
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41 TimeStamp Management::_stamp; |
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42 |
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43 void management_init() { |
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44 Management::init(); |
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45 ThreadService::init(); |
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46 RuntimeService::init(); |
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47 ClassLoadingService::init(); |
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48 } |
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49 |
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50 void Management::init() { |
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51 EXCEPTION_MARK; |
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52 |
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53 // These counters are for java.lang.management API support. |
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54 // They are created even if -XX:-UsePerfData is set and in |
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55 // that case, they will be allocated on C heap. |
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56 |
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57 _begin_vm_creation_time = |
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58 PerfDataManager::create_variable(SUN_RT, "createVmBeginTime", |
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59 PerfData::U_None, CHECK); |
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60 |
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61 _end_vm_creation_time = |
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62 PerfDataManager::create_variable(SUN_RT, "createVmEndTime", |
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63 PerfData::U_None, CHECK); |
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64 |
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65 _vm_init_done_time = |
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66 PerfDataManager::create_variable(SUN_RT, "vmInitDoneTime", |
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67 PerfData::U_None, CHECK); |
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68 |
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69 // Initialize optional support |
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70 _optional_support.isLowMemoryDetectionSupported = 1; |
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71 _optional_support.isCompilationTimeMonitoringSupported = 1; |
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72 _optional_support.isThreadContentionMonitoringSupported = 1; |
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73 |
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74 if (os::is_thread_cpu_time_supported()) { |
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75 _optional_support.isCurrentThreadCpuTimeSupported = 1; |
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76 _optional_support.isOtherThreadCpuTimeSupported = 1; |
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77 } else { |
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78 _optional_support.isCurrentThreadCpuTimeSupported = 0; |
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79 _optional_support.isOtherThreadCpuTimeSupported = 0; |
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80 } |
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81 _optional_support.isBootClassPathSupported = 1; |
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82 _optional_support.isObjectMonitorUsageSupported = 1; |
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83 #ifndef SERVICES_KERNEL |
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84 // This depends on the heap inspector |
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85 _optional_support.isSynchronizerUsageSupported = 1; |
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86 #endif // SERVICES_KERNEL |
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87 } |
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88 |
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89 void Management::initialize(TRAPS) { |
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90 // Start the low memory detector thread |
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91 LowMemoryDetector::initialize(); |
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92 |
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93 if (ManagementServer) { |
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94 ResourceMark rm(THREAD); |
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95 HandleMark hm(THREAD); |
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96 |
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97 // Load and initialize the sun.management.Agent class |
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98 // invoke startAgent method to start the management server |
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99 Handle loader = Handle(THREAD, SystemDictionary::java_system_loader()); |
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100 klassOop k = SystemDictionary::resolve_or_fail(vmSymbolHandles::sun_management_Agent(), |
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101 loader, |
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102 Handle(), |
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103 true, |
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104 CHECK); |
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105 instanceKlassHandle ik (THREAD, k); |
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106 |
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107 JavaValue result(T_VOID); |
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108 JavaCalls::call_static(&result, |
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109 ik, |
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110 vmSymbolHandles::startAgent_name(), |
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111 vmSymbolHandles::void_method_signature(), |
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112 CHECK); |
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113 } |
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114 } |
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115 |
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116 void Management::get_optional_support(jmmOptionalSupport* support) { |
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117 memcpy(support, &_optional_support, sizeof(jmmOptionalSupport)); |
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118 } |
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119 |
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120 klassOop Management::load_and_initialize_klass(symbolHandle sh, TRAPS) { |
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121 klassOop k = SystemDictionary::resolve_or_fail(sh, true, CHECK_NULL); |
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122 instanceKlassHandle ik (THREAD, k); |
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123 if (ik->should_be_initialized()) { |
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124 ik->initialize(CHECK_NULL); |
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125 } |
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126 return ik(); |
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127 } |
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128 |
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129 void Management::record_vm_startup_time(jlong begin, jlong duration) { |
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130 // if the performance counter is not initialized, |
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131 // then vm initialization failed; simply return. |
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132 if (_begin_vm_creation_time == NULL) return; |
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133 |
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134 _begin_vm_creation_time->set_value(begin); |
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135 _end_vm_creation_time->set_value(begin + duration); |
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136 PerfMemory::set_accessible(true); |
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137 } |
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138 |
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139 jlong Management::timestamp() { |
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140 TimeStamp t; |
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141 t.update(); |
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142 return t.ticks() - _stamp.ticks(); |
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143 } |
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144 |
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145 void Management::oops_do(OopClosure* f) { |
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146 MemoryService::oops_do(f); |
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147 ThreadService::oops_do(f); |
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148 |
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149 f->do_oop((oop*) &_sensor_klass); |
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150 f->do_oop((oop*) &_threadInfo_klass); |
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151 f->do_oop((oop*) &_memoryUsage_klass); |
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152 f->do_oop((oop*) &_memoryPoolMXBean_klass); |
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153 f->do_oop((oop*) &_memoryManagerMXBean_klass); |
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154 f->do_oop((oop*) &_garbageCollectorMXBean_klass); |
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155 f->do_oop((oop*) &_managementFactory_klass); |
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156 } |
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157 |
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158 klassOop Management::java_lang_management_ThreadInfo_klass(TRAPS) { |
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159 if (_threadInfo_klass == NULL) { |
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160 _threadInfo_klass = load_and_initialize_klass(vmSymbolHandles::java_lang_management_ThreadInfo(), CHECK_NULL); |
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161 } |
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162 return _threadInfo_klass; |
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163 } |
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164 |
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165 klassOop Management::java_lang_management_MemoryUsage_klass(TRAPS) { |
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166 if (_memoryUsage_klass == NULL) { |
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167 _memoryUsage_klass = load_and_initialize_klass(vmSymbolHandles::java_lang_management_MemoryUsage(), CHECK_NULL); |
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168 } |
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169 return _memoryUsage_klass; |
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170 } |
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171 |
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172 klassOop Management::java_lang_management_MemoryPoolMXBean_klass(TRAPS) { |
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173 if (_memoryPoolMXBean_klass == NULL) { |
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174 _memoryPoolMXBean_klass = load_and_initialize_klass(vmSymbolHandles::java_lang_management_MemoryPoolMXBean(), CHECK_NULL); |
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175 } |
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176 return _memoryPoolMXBean_klass; |
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177 } |
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178 |
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179 klassOop Management::java_lang_management_MemoryManagerMXBean_klass(TRAPS) { |
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180 if (_memoryManagerMXBean_klass == NULL) { |
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181 _memoryManagerMXBean_klass = load_and_initialize_klass(vmSymbolHandles::java_lang_management_MemoryManagerMXBean(), CHECK_NULL); |
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182 } |
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183 return _memoryManagerMXBean_klass; |
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184 } |
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185 |
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186 klassOop Management::java_lang_management_GarbageCollectorMXBean_klass(TRAPS) { |
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187 if (_garbageCollectorMXBean_klass == NULL) { |
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188 _garbageCollectorMXBean_klass = load_and_initialize_klass(vmSymbolHandles::java_lang_management_GarbageCollectorMXBean(), CHECK_NULL); |
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189 } |
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190 return _garbageCollectorMXBean_klass; |
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191 } |
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192 |
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193 klassOop Management::sun_management_Sensor_klass(TRAPS) { |
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194 if (_sensor_klass == NULL) { |
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195 _sensor_klass = load_and_initialize_klass(vmSymbolHandles::sun_management_Sensor(), CHECK_NULL); |
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196 } |
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197 return _sensor_klass; |
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198 } |
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199 |
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200 klassOop Management::sun_management_ManagementFactory_klass(TRAPS) { |
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201 if (_managementFactory_klass == NULL) { |
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202 _managementFactory_klass = load_and_initialize_klass(vmSymbolHandles::sun_management_ManagementFactory(), CHECK_NULL); |
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203 } |
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204 return _managementFactory_klass; |
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205 } |
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206 |
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207 static void initialize_ThreadInfo_constructor_arguments(JavaCallArguments* args, ThreadSnapshot* snapshot, TRAPS) { |
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208 Handle snapshot_thread(THREAD, snapshot->threadObj()); |
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209 |
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210 jlong contended_time; |
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211 jlong waited_time; |
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212 if (ThreadService::is_thread_monitoring_contention()) { |
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213 contended_time = Management::ticks_to_ms(snapshot->contended_enter_ticks()); |
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214 waited_time = Management::ticks_to_ms(snapshot->monitor_wait_ticks() + snapshot->sleep_ticks()); |
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215 } else { |
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216 // set them to -1 if thread contention monitoring is disabled. |
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217 contended_time = max_julong; |
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218 waited_time = max_julong; |
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219 } |
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220 |
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221 int thread_status = snapshot->thread_status(); |
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222 assert((thread_status & JMM_THREAD_STATE_FLAG_MASK) == 0, "Flags already set in thread_status in Thread object"); |
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223 if (snapshot->is_ext_suspended()) { |
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224 thread_status |= JMM_THREAD_STATE_FLAG_SUSPENDED; |
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225 } |
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226 if (snapshot->is_in_native()) { |
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227 thread_status |= JMM_THREAD_STATE_FLAG_NATIVE; |
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228 } |
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229 |
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230 ThreadStackTrace* st = snapshot->get_stack_trace(); |
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231 Handle stacktrace_h; |
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232 if (st != NULL) { |
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233 stacktrace_h = st->allocate_fill_stack_trace_element_array(CHECK); |
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234 } else { |
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235 stacktrace_h = Handle(); |
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236 } |
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237 |
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238 args->push_oop(snapshot_thread); |
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239 args->push_int(thread_status); |
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240 args->push_oop(Handle(THREAD, snapshot->blocker_object())); |
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241 args->push_oop(Handle(THREAD, snapshot->blocker_object_owner())); |
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242 args->push_long(snapshot->contended_enter_count()); |
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243 args->push_long(contended_time); |
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244 args->push_long(snapshot->monitor_wait_count() + snapshot->sleep_count()); |
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245 args->push_long(waited_time); |
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246 args->push_oop(stacktrace_h); |
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247 } |
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248 |
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249 // Helper function to construct a ThreadInfo object |
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250 instanceOop Management::create_thread_info_instance(ThreadSnapshot* snapshot, TRAPS) { |
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251 klassOop k = Management::java_lang_management_ThreadInfo_klass(CHECK_NULL); |
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252 instanceKlassHandle ik (THREAD, k); |
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253 |
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254 JavaValue result(T_VOID); |
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255 JavaCallArguments args(14); |
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256 |
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257 // First allocate a ThreadObj object and |
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258 // push the receiver as the first argument |
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259 Handle element = ik->allocate_instance_handle(CHECK_NULL); |
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260 args.push_oop(element); |
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261 |
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262 // initialize the arguments for the ThreadInfo constructor |
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263 initialize_ThreadInfo_constructor_arguments(&args, snapshot, CHECK_NULL); |
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264 |
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265 // Call ThreadInfo constructor with no locked monitors and synchronizers |
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266 JavaCalls::call_special(&result, |
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267 ik, |
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268 vmSymbolHandles::object_initializer_name(), |
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269 vmSymbolHandles::java_lang_management_ThreadInfo_constructor_signature(), |
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270 &args, |
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271 CHECK_NULL); |
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272 |
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273 return (instanceOop) element(); |
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274 } |
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275 |
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276 instanceOop Management::create_thread_info_instance(ThreadSnapshot* snapshot, |
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277 objArrayHandle monitors_array, |
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278 typeArrayHandle depths_array, |
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279 objArrayHandle synchronizers_array, |
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280 TRAPS) { |
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281 klassOop k = Management::java_lang_management_ThreadInfo_klass(CHECK_NULL); |
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282 instanceKlassHandle ik (THREAD, k); |
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283 |
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284 JavaValue result(T_VOID); |
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285 JavaCallArguments args(17); |
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286 |
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287 // First allocate a ThreadObj object and |
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288 // push the receiver as the first argument |
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289 Handle element = ik->allocate_instance_handle(CHECK_NULL); |
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290 args.push_oop(element); |
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291 |
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292 // initialize the arguments for the ThreadInfo constructor |
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293 initialize_ThreadInfo_constructor_arguments(&args, snapshot, CHECK_NULL); |
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294 |
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295 // push the locked monitors and synchronizers in the arguments |
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296 args.push_oop(monitors_array); |
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297 args.push_oop(depths_array); |
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298 args.push_oop(synchronizers_array); |
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299 |
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300 // Call ThreadInfo constructor with locked monitors and synchronizers |
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301 JavaCalls::call_special(&result, |
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302 ik, |
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303 vmSymbolHandles::object_initializer_name(), |
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304 vmSymbolHandles::java_lang_management_ThreadInfo_with_locks_constructor_signature(), |
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305 &args, |
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306 CHECK_NULL); |
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307 |
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308 return (instanceOop) element(); |
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309 } |
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310 |
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311 // Helper functions |
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312 static JavaThread* find_java_thread_from_id(jlong thread_id) { |
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313 assert(Threads_lock->owned_by_self(), "Must hold Threads_lock"); |
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314 |
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315 JavaThread* java_thread = NULL; |
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316 // Sequential search for now. Need to do better optimization later. |
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317 for (JavaThread* thread = Threads::first(); thread != NULL; thread = thread->next()) { |
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318 oop tobj = thread->threadObj(); |
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319 if (!thread->is_exiting() && |
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320 tobj != NULL && |
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321 thread_id == java_lang_Thread::thread_id(tobj)) { |
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322 java_thread = thread; |
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323 break; |
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324 } |
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325 } |
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326 return java_thread; |
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327 } |
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328 |
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329 static GCMemoryManager* get_gc_memory_manager_from_jobject(jobject mgr, TRAPS) { |
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330 if (mgr == NULL) { |
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331 THROW_(vmSymbols::java_lang_NullPointerException(), NULL); |
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332 } |
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333 oop mgr_obj = JNIHandles::resolve(mgr); |
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334 instanceHandle h(THREAD, (instanceOop) mgr_obj); |
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335 |
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336 klassOop k = Management::java_lang_management_GarbageCollectorMXBean_klass(CHECK_NULL); |
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337 if (!h->is_a(k)) { |
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338 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), |
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339 "the object is not an instance of java.lang.management.GarbageCollectorMXBean class", |
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340 NULL); |
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341 } |
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342 |
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343 MemoryManager* gc = MemoryService::get_memory_manager(h); |
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344 if (gc == NULL || !gc->is_gc_memory_manager()) { |
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345 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), |
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346 "Invalid GC memory manager", |
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347 NULL); |
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348 } |
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349 return (GCMemoryManager*) gc; |
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350 } |
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351 |
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352 static MemoryPool* get_memory_pool_from_jobject(jobject obj, TRAPS) { |
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353 if (obj == NULL) { |
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354 THROW_(vmSymbols::java_lang_NullPointerException(), NULL); |
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355 } |
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356 |
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357 oop pool_obj = JNIHandles::resolve(obj); |
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358 assert(pool_obj->is_instance(), "Should be an instanceOop"); |
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359 instanceHandle ph(THREAD, (instanceOop) pool_obj); |
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360 |
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361 return MemoryService::get_memory_pool(ph); |
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362 } |
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363 |
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364 static void validate_thread_id_array(typeArrayHandle ids_ah, TRAPS) { |
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365 int num_threads = ids_ah->length(); |
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366 // should be non-empty array |
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367 if (num_threads == 0) { |
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368 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), |
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369 "Empty array of thread IDs"); |
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370 } |
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371 |
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372 // Validate input thread IDs |
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373 int i = 0; |
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374 for (i = 0; i < num_threads; i++) { |
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375 jlong tid = ids_ah->long_at(i); |
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376 if (tid <= 0) { |
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377 // throw exception if invalid thread id. |
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378 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), |
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379 "Invalid thread ID entry"); |
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380 } |
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381 } |
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382 |
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383 } |
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384 |
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385 static void validate_thread_info_array(objArrayHandle infoArray_h, TRAPS) { |
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386 |
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387 // check if the element of infoArray is of type ThreadInfo class |
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388 klassOop threadinfo_klass = Management::java_lang_management_ThreadInfo_klass(CHECK); |
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389 klassOop element_klass = objArrayKlass::cast(infoArray_h->klass())->element_klass(); |
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390 if (element_klass != threadinfo_klass) { |
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391 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), |
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392 "infoArray element type is not ThreadInfo class"); |
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393 } |
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394 |
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395 } |
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396 |
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397 |
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398 static MemoryManager* get_memory_manager_from_jobject(jobject obj, TRAPS) { |
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399 if (obj == NULL) { |
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400 THROW_(vmSymbols::java_lang_NullPointerException(), NULL); |
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401 } |
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402 |
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403 oop mgr_obj = JNIHandles::resolve(obj); |
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404 assert(mgr_obj->is_instance(), "Should be an instanceOop"); |
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405 instanceHandle mh(THREAD, (instanceOop) mgr_obj); |
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406 |
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407 return MemoryService::get_memory_manager(mh); |
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408 } |
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409 |
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410 // Returns a version string and sets major and minor version if |
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411 // the input parameters are non-null. |
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412 JVM_LEAF(jint, jmm_GetVersion(JNIEnv *env)) |
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413 return JMM_VERSION; |
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414 JVM_END |
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415 |
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416 // Gets the list of VM monitoring and management optional supports |
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417 // Returns 0 if succeeded; otherwise returns non-zero. |
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418 JVM_LEAF(jint, jmm_GetOptionalSupport(JNIEnv *env, jmmOptionalSupport* support)) |
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419 if (support == NULL) { |
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420 return -1; |
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421 } |
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422 Management::get_optional_support(support); |
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423 return 0; |
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424 JVM_END |
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425 |
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426 // Returns a java.lang.String object containing the input arguments to the VM. |
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427 JVM_ENTRY(jobject, jmm_GetInputArguments(JNIEnv *env)) |
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428 ResourceMark rm(THREAD); |
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429 |
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430 if (Arguments::num_jvm_args() == 0 && Arguments::num_jvm_flags() == 0) { |
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431 return NULL; |
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432 } |
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433 |
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434 char** vm_flags = Arguments::jvm_flags_array(); |
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435 char** vm_args = Arguments::jvm_args_array(); |
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436 int num_flags = Arguments::num_jvm_flags(); |
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437 int num_args = Arguments::num_jvm_args(); |
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438 |
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439 size_t length = 1; // null terminator |
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440 int i; |
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441 for (i = 0; i < num_flags; i++) { |
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442 length += strlen(vm_flags[i]); |
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443 } |
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444 for (i = 0; i < num_args; i++) { |
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445 length += strlen(vm_args[i]); |
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446 } |
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447 // add a space between each argument |
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448 length += num_flags + num_args - 1; |
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449 |
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450 // Return the list of input arguments passed to the VM |
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451 // and preserve the order that the VM processes. |
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452 char* args = NEW_RESOURCE_ARRAY(char, length); |
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453 args[0] = '\0'; |
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454 // concatenate all jvm_flags |
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455 if (num_flags > 0) { |
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456 strcat(args, vm_flags[0]); |
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457 for (i = 1; i < num_flags; i++) { |
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458 strcat(args, " "); |
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459 strcat(args, vm_flags[i]); |
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460 } |
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461 } |
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462 |
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463 if (num_args > 0 && num_flags > 0) { |
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464 // append a space if args already contains one or more jvm_flags |
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465 strcat(args, " "); |
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466 } |
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467 |
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468 // concatenate all jvm_args |
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469 if (num_args > 0) { |
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470 strcat(args, vm_args[0]); |
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471 for (i = 1; i < num_args; i++) { |
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472 strcat(args, " "); |
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473 strcat(args, vm_args[i]); |
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474 } |
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475 } |
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476 |
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477 Handle hargs = java_lang_String::create_from_platform_dependent_str(args, CHECK_NULL); |
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478 return JNIHandles::make_local(env, hargs()); |
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479 JVM_END |
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480 |
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481 // Returns an array of java.lang.String object containing the input arguments to the VM. |
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482 JVM_ENTRY(jobjectArray, jmm_GetInputArgumentArray(JNIEnv *env)) |
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483 ResourceMark rm(THREAD); |
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484 |
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485 if (Arguments::num_jvm_args() == 0 && Arguments::num_jvm_flags() == 0) { |
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486 return NULL; |
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487 } |
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488 |
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489 char** vm_flags = Arguments::jvm_flags_array(); |
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490 char** vm_args = Arguments::jvm_args_array(); |
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491 int num_flags = Arguments::num_jvm_flags(); |
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492 int num_args = Arguments::num_jvm_args(); |
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493 |
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494 instanceKlassHandle ik (THREAD, SystemDictionary::string_klass()); |
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495 objArrayOop r = oopFactory::new_objArray(ik(), num_args + num_flags, CHECK_NULL); |
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496 objArrayHandle result_h(THREAD, r); |
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497 |
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498 int index = 0; |
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499 for (int j = 0; j < num_flags; j++, index++) { |
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500 Handle h = java_lang_String::create_from_platform_dependent_str(vm_flags[j], CHECK_NULL); |
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501 result_h->obj_at_put(index, h()); |
|
502 } |
|
503 for (int i = 0; i < num_args; i++, index++) { |
|
504 Handle h = java_lang_String::create_from_platform_dependent_str(vm_args[i], CHECK_NULL); |
|
505 result_h->obj_at_put(index, h()); |
|
506 } |
|
507 return (jobjectArray) JNIHandles::make_local(env, result_h()); |
|
508 JVM_END |
|
509 |
|
510 // Returns an array of java/lang/management/MemoryPoolMXBean object |
|
511 // one for each memory pool if obj == null; otherwise returns |
|
512 // an array of memory pools for a given memory manager if |
|
513 // it is a valid memory manager. |
|
514 JVM_ENTRY(jobjectArray, jmm_GetMemoryPools(JNIEnv* env, jobject obj)) |
|
515 ResourceMark rm(THREAD); |
|
516 |
|
517 int num_memory_pools; |
|
518 MemoryManager* mgr = NULL; |
|
519 if (obj == NULL) { |
|
520 num_memory_pools = MemoryService::num_memory_pools(); |
|
521 } else { |
|
522 mgr = get_memory_manager_from_jobject(obj, CHECK_NULL); |
|
523 if (mgr == NULL) { |
|
524 return NULL; |
|
525 } |
|
526 num_memory_pools = mgr->num_memory_pools(); |
|
527 } |
|
528 |
|
529 // Allocate the resulting MemoryPoolMXBean[] object |
|
530 klassOop k = Management::java_lang_management_MemoryPoolMXBean_klass(CHECK_NULL); |
|
531 instanceKlassHandle ik (THREAD, k); |
|
532 objArrayOop r = oopFactory::new_objArray(ik(), num_memory_pools, CHECK_NULL); |
|
533 objArrayHandle poolArray(THREAD, r); |
|
534 |
|
535 if (mgr == NULL) { |
|
536 // Get all memory pools |
|
537 for (int i = 0; i < num_memory_pools; i++) { |
|
538 MemoryPool* pool = MemoryService::get_memory_pool(i); |
|
539 instanceOop p = pool->get_memory_pool_instance(CHECK_NULL); |
|
540 instanceHandle ph(THREAD, p); |
|
541 poolArray->obj_at_put(i, ph()); |
|
542 } |
|
543 } else { |
|
544 // Get memory pools managed by a given memory manager |
|
545 for (int i = 0; i < num_memory_pools; i++) { |
|
546 MemoryPool* pool = mgr->get_memory_pool(i); |
|
547 instanceOop p = pool->get_memory_pool_instance(CHECK_NULL); |
|
548 instanceHandle ph(THREAD, p); |
|
549 poolArray->obj_at_put(i, ph()); |
|
550 } |
|
551 } |
|
552 return (jobjectArray) JNIHandles::make_local(env, poolArray()); |
|
553 JVM_END |
|
554 |
|
555 // Returns an array of java/lang/management/MemoryManagerMXBean object |
|
556 // one for each memory manager if obj == null; otherwise returns |
|
557 // an array of memory managers for a given memory pool if |
|
558 // it is a valid memory pool. |
|
559 JVM_ENTRY(jobjectArray, jmm_GetMemoryManagers(JNIEnv* env, jobject obj)) |
|
560 ResourceMark rm(THREAD); |
|
561 |
|
562 int num_mgrs; |
|
563 MemoryPool* pool = NULL; |
|
564 if (obj == NULL) { |
|
565 num_mgrs = MemoryService::num_memory_managers(); |
|
566 } else { |
|
567 pool = get_memory_pool_from_jobject(obj, CHECK_NULL); |
|
568 if (pool == NULL) { |
|
569 return NULL; |
|
570 } |
|
571 num_mgrs = pool->num_memory_managers(); |
|
572 } |
|
573 |
|
574 // Allocate the resulting MemoryManagerMXBean[] object |
|
575 klassOop k = Management::java_lang_management_MemoryManagerMXBean_klass(CHECK_NULL); |
|
576 instanceKlassHandle ik (THREAD, k); |
|
577 objArrayOop r = oopFactory::new_objArray(ik(), num_mgrs, CHECK_NULL); |
|
578 objArrayHandle mgrArray(THREAD, r); |
|
579 |
|
580 if (pool == NULL) { |
|
581 // Get all memory managers |
|
582 for (int i = 0; i < num_mgrs; i++) { |
|
583 MemoryManager* mgr = MemoryService::get_memory_manager(i); |
|
584 instanceOop p = mgr->get_memory_manager_instance(CHECK_NULL); |
|
585 instanceHandle ph(THREAD, p); |
|
586 mgrArray->obj_at_put(i, ph()); |
|
587 } |
|
588 } else { |
|
589 // Get memory managers for a given memory pool |
|
590 for (int i = 0; i < num_mgrs; i++) { |
|
591 MemoryManager* mgr = pool->get_memory_manager(i); |
|
592 instanceOop p = mgr->get_memory_manager_instance(CHECK_NULL); |
|
593 instanceHandle ph(THREAD, p); |
|
594 mgrArray->obj_at_put(i, ph()); |
|
595 } |
|
596 } |
|
597 return (jobjectArray) JNIHandles::make_local(env, mgrArray()); |
|
598 JVM_END |
|
599 |
|
600 |
|
601 // Returns a java/lang/management/MemoryUsage object containing the memory usage |
|
602 // of a given memory pool. |
|
603 JVM_ENTRY(jobject, jmm_GetMemoryPoolUsage(JNIEnv* env, jobject obj)) |
|
604 ResourceMark rm(THREAD); |
|
605 |
|
606 MemoryPool* pool = get_memory_pool_from_jobject(obj, CHECK_NULL); |
|
607 if (pool != NULL) { |
|
608 MemoryUsage usage = pool->get_memory_usage(); |
|
609 Handle h = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL); |
|
610 return JNIHandles::make_local(env, h()); |
|
611 } else { |
|
612 return NULL; |
|
613 } |
|
614 JVM_END |
|
615 |
|
616 // Returns a java/lang/management/MemoryUsage object containing the memory usage |
|
617 // of a given memory pool. |
|
618 JVM_ENTRY(jobject, jmm_GetPeakMemoryPoolUsage(JNIEnv* env, jobject obj)) |
|
619 ResourceMark rm(THREAD); |
|
620 |
|
621 MemoryPool* pool = get_memory_pool_from_jobject(obj, CHECK_NULL); |
|
622 if (pool != NULL) { |
|
623 MemoryUsage usage = pool->get_peak_memory_usage(); |
|
624 Handle h = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL); |
|
625 return JNIHandles::make_local(env, h()); |
|
626 } else { |
|
627 return NULL; |
|
628 } |
|
629 JVM_END |
|
630 |
|
631 // Returns a java/lang/management/MemoryUsage object containing the memory usage |
|
632 // of a given memory pool after most recent GC. |
|
633 JVM_ENTRY(jobject, jmm_GetPoolCollectionUsage(JNIEnv* env, jobject obj)) |
|
634 ResourceMark rm(THREAD); |
|
635 |
|
636 MemoryPool* pool = get_memory_pool_from_jobject(obj, CHECK_NULL); |
|
637 if (pool != NULL && pool->is_collected_pool()) { |
|
638 MemoryUsage usage = pool->get_last_collection_usage(); |
|
639 Handle h = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL); |
|
640 return JNIHandles::make_local(env, h()); |
|
641 } else { |
|
642 return NULL; |
|
643 } |
|
644 JVM_END |
|
645 |
|
646 // Sets the memory pool sensor for a threshold type |
|
647 JVM_ENTRY(void, jmm_SetPoolSensor(JNIEnv* env, jobject obj, jmmThresholdType type, jobject sensorObj)) |
|
648 if (obj == NULL || sensorObj == NULL) { |
|
649 THROW(vmSymbols::java_lang_NullPointerException()); |
|
650 } |
|
651 |
|
652 klassOop sensor_klass = Management::sun_management_Sensor_klass(CHECK); |
|
653 oop s = JNIHandles::resolve(sensorObj); |
|
654 assert(s->is_instance(), "Sensor should be an instanceOop"); |
|
655 instanceHandle sensor_h(THREAD, (instanceOop) s); |
|
656 if (!sensor_h->is_a(sensor_klass)) { |
|
657 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), |
|
658 "Sensor is not an instance of sun.management.Sensor class"); |
|
659 } |
|
660 |
|
661 MemoryPool* mpool = get_memory_pool_from_jobject(obj, CHECK); |
|
662 assert(mpool != NULL, "MemoryPool should exist"); |
|
663 |
|
664 switch (type) { |
|
665 case JMM_USAGE_THRESHOLD_HIGH: |
|
666 case JMM_USAGE_THRESHOLD_LOW: |
|
667 // have only one sensor for threshold high and low |
|
668 mpool->set_usage_sensor_obj(sensor_h); |
|
669 break; |
|
670 case JMM_COLLECTION_USAGE_THRESHOLD_HIGH: |
|
671 case JMM_COLLECTION_USAGE_THRESHOLD_LOW: |
|
672 // have only one sensor for threshold high and low |
|
673 mpool->set_gc_usage_sensor_obj(sensor_h); |
|
674 break; |
|
675 default: |
|
676 assert(false, "Unrecognized type"); |
|
677 } |
|
678 |
|
679 JVM_END |
|
680 |
|
681 |
|
682 // Sets the threshold of a given memory pool. |
|
683 // Returns the previous threshold. |
|
684 // |
|
685 // Input parameters: |
|
686 // pool - the MemoryPoolMXBean object |
|
687 // type - threshold type |
|
688 // threshold - the new threshold (must not be negative) |
|
689 // |
|
690 JVM_ENTRY(jlong, jmm_SetPoolThreshold(JNIEnv* env, jobject obj, jmmThresholdType type, jlong threshold)) |
|
691 if (threshold < 0) { |
|
692 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), |
|
693 "Invalid threshold value", |
|
694 -1); |
|
695 } |
|
696 |
|
697 if (threshold > max_intx) { |
|
698 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), |
|
699 "Invalid threshold value > max value of size_t", |
|
700 -1); |
|
701 } |
|
702 |
|
703 MemoryPool* pool = get_memory_pool_from_jobject(obj, CHECK_(0L)); |
|
704 assert(pool != NULL, "MemoryPool should exist"); |
|
705 |
|
706 jlong prev = 0; |
|
707 switch (type) { |
|
708 case JMM_USAGE_THRESHOLD_HIGH: |
|
709 if (!pool->usage_threshold()->is_high_threshold_supported()) { |
|
710 return -1; |
|
711 } |
|
712 prev = pool->usage_threshold()->set_high_threshold((size_t) threshold); |
|
713 break; |
|
714 |
|
715 case JMM_USAGE_THRESHOLD_LOW: |
|
716 if (!pool->usage_threshold()->is_low_threshold_supported()) { |
|
717 return -1; |
|
718 } |
|
719 prev = pool->usage_threshold()->set_low_threshold((size_t) threshold); |
|
720 break; |
|
721 |
|
722 case JMM_COLLECTION_USAGE_THRESHOLD_HIGH: |
|
723 if (!pool->gc_usage_threshold()->is_high_threshold_supported()) { |
|
724 return -1; |
|
725 } |
|
726 // return and the new threshold is effective for the next GC |
|
727 return pool->gc_usage_threshold()->set_high_threshold((size_t) threshold); |
|
728 |
|
729 case JMM_COLLECTION_USAGE_THRESHOLD_LOW: |
|
730 if (!pool->gc_usage_threshold()->is_low_threshold_supported()) { |
|
731 return -1; |
|
732 } |
|
733 // return and the new threshold is effective for the next GC |
|
734 return pool->gc_usage_threshold()->set_low_threshold((size_t) threshold); |
|
735 |
|
736 default: |
|
737 assert(false, "Unrecognized type"); |
|
738 return -1; |
|
739 } |
|
740 |
|
741 // When the threshold is changed, reevaluate if the low memory |
|
742 // detection is enabled. |
|
743 if (prev != threshold) { |
|
744 LowMemoryDetector::recompute_enabled_for_collected_pools(); |
|
745 LowMemoryDetector::detect_low_memory(pool); |
|
746 } |
|
747 return prev; |
|
748 JVM_END |
|
749 |
|
750 // Returns a java/lang/management/MemoryUsage object representing |
|
751 // the memory usage for the heap or non-heap memory. |
|
752 JVM_ENTRY(jobject, jmm_GetMemoryUsage(JNIEnv* env, jboolean heap)) |
|
753 ResourceMark rm(THREAD); |
|
754 |
|
755 // Calculate the memory usage |
|
756 size_t total_init = 0; |
|
757 size_t total_used = 0; |
|
758 size_t total_committed = 0; |
|
759 size_t total_max = 0; |
|
760 bool has_undefined_init_size = false; |
|
761 bool has_undefined_max_size = false; |
|
762 |
|
763 for (int i = 0; i < MemoryService::num_memory_pools(); i++) { |
|
764 MemoryPool* pool = MemoryService::get_memory_pool(i); |
|
765 if ((heap && pool->is_heap()) || (!heap && pool->is_non_heap())) { |
|
766 MemoryUsage u = pool->get_memory_usage(); |
|
767 total_used += u.used(); |
|
768 total_committed += u.committed(); |
|
769 |
|
770 // if any one of the memory pool has undefined init_size or max_size, |
|
771 // set it to -1 |
|
772 if (u.init_size() == (size_t)-1) { |
|
773 has_undefined_init_size = true; |
|
774 } |
|
775 if (!has_undefined_init_size) { |
|
776 total_init += u.init_size(); |
|
777 } |
|
778 |
|
779 if (u.max_size() == (size_t)-1) { |
|
780 has_undefined_max_size = true; |
|
781 } |
|
782 if (!has_undefined_max_size) { |
|
783 total_max += u.max_size(); |
|
784 } |
|
785 } |
|
786 } |
|
787 |
|
788 // In our current implementation, all pools should have |
|
789 // defined init and max size |
|
790 assert(!has_undefined_init_size, "Undefined init size"); |
|
791 assert(!has_undefined_max_size, "Undefined max size"); |
|
792 |
|
793 MemoryUsage usage((heap ? Arguments::initial_heap_size() : total_init), |
|
794 total_used, |
|
795 total_committed, |
|
796 (heap ? Universe::heap()->max_capacity() : total_max)); |
|
797 |
|
798 Handle obj = MemoryService::create_MemoryUsage_obj(usage, CHECK_NULL); |
|
799 return JNIHandles::make_local(env, obj()); |
|
800 JVM_END |
|
801 |
|
802 // Returns the boolean value of a given attribute. |
|
803 JVM_LEAF(jboolean, jmm_GetBoolAttribute(JNIEnv *env, jmmBoolAttribute att)) |
|
804 switch (att) { |
|
805 case JMM_VERBOSE_GC: |
|
806 return MemoryService::get_verbose(); |
|
807 case JMM_VERBOSE_CLASS: |
|
808 return ClassLoadingService::get_verbose(); |
|
809 case JMM_THREAD_CONTENTION_MONITORING: |
|
810 return ThreadService::is_thread_monitoring_contention(); |
|
811 case JMM_THREAD_CPU_TIME: |
|
812 return ThreadService::is_thread_cpu_time_enabled(); |
|
813 default: |
|
814 assert(0, "Unrecognized attribute"); |
|
815 return false; |
|
816 } |
|
817 JVM_END |
|
818 |
|
819 // Sets the given boolean attribute and returns the previous value. |
|
820 JVM_ENTRY(jboolean, jmm_SetBoolAttribute(JNIEnv *env, jmmBoolAttribute att, jboolean flag)) |
|
821 switch (att) { |
|
822 case JMM_VERBOSE_GC: |
|
823 return MemoryService::set_verbose(flag != 0); |
|
824 case JMM_VERBOSE_CLASS: |
|
825 return ClassLoadingService::set_verbose(flag != 0); |
|
826 case JMM_THREAD_CONTENTION_MONITORING: |
|
827 return ThreadService::set_thread_monitoring_contention(flag != 0); |
|
828 case JMM_THREAD_CPU_TIME: |
|
829 return ThreadService::set_thread_cpu_time_enabled(flag != 0); |
|
830 default: |
|
831 assert(0, "Unrecognized attribute"); |
|
832 return false; |
|
833 } |
|
834 JVM_END |
|
835 |
|
836 |
|
837 static jlong get_gc_attribute(GCMemoryManager* mgr, jmmLongAttribute att) { |
|
838 switch (att) { |
|
839 case JMM_GC_TIME_MS: |
|
840 return mgr->gc_time_ms(); |
|
841 |
|
842 case JMM_GC_COUNT: |
|
843 return mgr->gc_count(); |
|
844 |
|
845 case JMM_GC_EXT_ATTRIBUTE_INFO_SIZE: |
|
846 // current implementation only has 1 ext attribute |
|
847 return 1; |
|
848 |
|
849 default: |
|
850 assert(0, "Unrecognized GC attribute"); |
|
851 return -1; |
|
852 } |
|
853 } |
|
854 |
|
855 class VmThreadCountClosure: public ThreadClosure { |
|
856 private: |
|
857 int _count; |
|
858 public: |
|
859 VmThreadCountClosure() : _count(0) {}; |
|
860 void do_thread(Thread* thread); |
|
861 int count() { return _count; } |
|
862 }; |
|
863 |
|
864 void VmThreadCountClosure::do_thread(Thread* thread) { |
|
865 // exclude externally visible JavaThreads |
|
866 if (thread->is_Java_thread() && !thread->is_hidden_from_external_view()) { |
|
867 return; |
|
868 } |
|
869 |
|
870 _count++; |
|
871 } |
|
872 |
|
873 static jint get_vm_thread_count() { |
|
874 VmThreadCountClosure vmtcc; |
|
875 { |
|
876 MutexLockerEx ml(Threads_lock); |
|
877 Threads::threads_do(&vmtcc); |
|
878 } |
|
879 |
|
880 return vmtcc.count(); |
|
881 } |
|
882 |
|
883 static jint get_num_flags() { |
|
884 // last flag entry is always NULL, so subtract 1 |
|
885 int nFlags = (int) Flag::numFlags - 1; |
|
886 int count = 0; |
|
887 for (int i = 0; i < nFlags; i++) { |
|
888 Flag* flag = &Flag::flags[i]; |
|
889 // Exclude the diagnostic flags |
|
890 if (flag->is_unlocked() || flag->is_unlocker()) { |
|
891 count++; |
|
892 } |
|
893 } |
|
894 return count; |
|
895 } |
|
896 |
|
897 static jlong get_long_attribute(jmmLongAttribute att) { |
|
898 switch (att) { |
|
899 case JMM_CLASS_LOADED_COUNT: |
|
900 return ClassLoadingService::loaded_class_count(); |
|
901 |
|
902 case JMM_CLASS_UNLOADED_COUNT: |
|
903 return ClassLoadingService::unloaded_class_count(); |
|
904 |
|
905 case JMM_THREAD_TOTAL_COUNT: |
|
906 return ThreadService::get_total_thread_count(); |
|
907 |
|
908 case JMM_THREAD_LIVE_COUNT: |
|
909 return ThreadService::get_live_thread_count(); |
|
910 |
|
911 case JMM_THREAD_PEAK_COUNT: |
|
912 return ThreadService::get_peak_thread_count(); |
|
913 |
|
914 case JMM_THREAD_DAEMON_COUNT: |
|
915 return ThreadService::get_daemon_thread_count(); |
|
916 |
|
917 case JMM_JVM_INIT_DONE_TIME_MS: |
|
918 return Management::vm_init_done_time(); |
|
919 |
|
920 case JMM_COMPILE_TOTAL_TIME_MS: |
|
921 return Management::ticks_to_ms(CompileBroker::total_compilation_ticks()); |
|
922 |
|
923 case JMM_OS_PROCESS_ID: |
|
924 return os::current_process_id(); |
|
925 |
|
926 // Hotspot-specific counters |
|
927 case JMM_CLASS_LOADED_BYTES: |
|
928 return ClassLoadingService::loaded_class_bytes(); |
|
929 |
|
930 case JMM_CLASS_UNLOADED_BYTES: |
|
931 return ClassLoadingService::unloaded_class_bytes(); |
|
932 |
|
933 case JMM_SHARED_CLASS_LOADED_COUNT: |
|
934 return ClassLoadingService::loaded_shared_class_count(); |
|
935 |
|
936 case JMM_SHARED_CLASS_UNLOADED_COUNT: |
|
937 return ClassLoadingService::unloaded_shared_class_count(); |
|
938 |
|
939 |
|
940 case JMM_SHARED_CLASS_LOADED_BYTES: |
|
941 return ClassLoadingService::loaded_shared_class_bytes(); |
|
942 |
|
943 case JMM_SHARED_CLASS_UNLOADED_BYTES: |
|
944 return ClassLoadingService::unloaded_shared_class_bytes(); |
|
945 |
|
946 case JMM_TOTAL_CLASSLOAD_TIME_MS: |
|
947 return ClassLoader::classloader_time_ms(); |
|
948 |
|
949 case JMM_VM_GLOBAL_COUNT: |
|
950 return get_num_flags(); |
|
951 |
|
952 case JMM_SAFEPOINT_COUNT: |
|
953 return RuntimeService::safepoint_count(); |
|
954 |
|
955 case JMM_TOTAL_SAFEPOINTSYNC_TIME_MS: |
|
956 return RuntimeService::safepoint_sync_time_ms(); |
|
957 |
|
958 case JMM_TOTAL_STOPPED_TIME_MS: |
|
959 return RuntimeService::safepoint_time_ms(); |
|
960 |
|
961 case JMM_TOTAL_APP_TIME_MS: |
|
962 return RuntimeService::application_time_ms(); |
|
963 |
|
964 case JMM_VM_THREAD_COUNT: |
|
965 return get_vm_thread_count(); |
|
966 |
|
967 case JMM_CLASS_INIT_TOTAL_COUNT: |
|
968 return ClassLoader::class_init_count(); |
|
969 |
|
970 case JMM_CLASS_INIT_TOTAL_TIME_MS: |
|
971 return ClassLoader::class_init_time_ms(); |
|
972 |
|
973 case JMM_CLASS_VERIFY_TOTAL_TIME_MS: |
|
974 return ClassLoader::class_verify_time_ms(); |
|
975 |
|
976 case JMM_METHOD_DATA_SIZE_BYTES: |
|
977 return ClassLoadingService::class_method_data_size(); |
|
978 |
|
979 case JMM_OS_MEM_TOTAL_PHYSICAL_BYTES: |
|
980 return os::physical_memory(); |
|
981 |
|
982 default: |
|
983 return -1; |
|
984 } |
|
985 } |
|
986 |
|
987 |
|
988 // Returns the long value of a given attribute. |
|
989 JVM_ENTRY(jlong, jmm_GetLongAttribute(JNIEnv *env, jobject obj, jmmLongAttribute att)) |
|
990 if (obj == NULL) { |
|
991 return get_long_attribute(att); |
|
992 } else { |
|
993 GCMemoryManager* mgr = get_gc_memory_manager_from_jobject(obj, CHECK_(0L)); |
|
994 if (mgr != NULL) { |
|
995 return get_gc_attribute(mgr, att); |
|
996 } |
|
997 } |
|
998 return -1; |
|
999 JVM_END |
|
1000 |
|
1001 // Gets the value of all attributes specified in the given array |
|
1002 // and sets the value in the result array. |
|
1003 // Returns the number of attributes found. |
|
1004 JVM_ENTRY(jint, jmm_GetLongAttributes(JNIEnv *env, |
|
1005 jobject obj, |
|
1006 jmmLongAttribute* atts, |
|
1007 jint count, |
|
1008 jlong* result)) |
|
1009 |
|
1010 int num_atts = 0; |
|
1011 if (obj == NULL) { |
|
1012 for (int i = 0; i < count; i++) { |
|
1013 result[i] = get_long_attribute(atts[i]); |
|
1014 if (result[i] != -1) { |
|
1015 num_atts++; |
|
1016 } |
|
1017 } |
|
1018 } else { |
|
1019 GCMemoryManager* mgr = get_gc_memory_manager_from_jobject(obj, CHECK_0); |
|
1020 for (int i = 0; i < count; i++) { |
|
1021 result[i] = get_gc_attribute(mgr, atts[i]); |
|
1022 if (result[i] != -1) { |
|
1023 num_atts++; |
|
1024 } |
|
1025 } |
|
1026 } |
|
1027 return num_atts; |
|
1028 JVM_END |
|
1029 |
|
1030 // Helper function to do thread dump for a specific list of threads |
|
1031 static void do_thread_dump(ThreadDumpResult* dump_result, |
|
1032 typeArrayHandle ids_ah, // array of thread ID (long[]) |
|
1033 int num_threads, |
|
1034 int max_depth, |
|
1035 bool with_locked_monitors, |
|
1036 bool with_locked_synchronizers, |
|
1037 TRAPS) { |
|
1038 |
|
1039 // First get an array of threadObj handles. |
|
1040 // A JavaThread may terminate before we get the stack trace. |
|
1041 GrowableArray<instanceHandle>* thread_handle_array = new GrowableArray<instanceHandle>(num_threads); |
|
1042 { |
|
1043 MutexLockerEx ml(Threads_lock); |
|
1044 for (int i = 0; i < num_threads; i++) { |
|
1045 jlong tid = ids_ah->long_at(i); |
|
1046 JavaThread* jt = find_java_thread_from_id(tid); |
|
1047 oop thread_obj = (jt != NULL ? jt->threadObj() : (oop)NULL); |
|
1048 instanceHandle threadObj_h(THREAD, (instanceOop) thread_obj); |
|
1049 thread_handle_array->append(threadObj_h); |
|
1050 } |
|
1051 } |
|
1052 |
|
1053 // Obtain thread dumps and thread snapshot information |
|
1054 VM_ThreadDump op(dump_result, |
|
1055 thread_handle_array, |
|
1056 num_threads, |
|
1057 max_depth, /* stack depth */ |
|
1058 with_locked_monitors, |
|
1059 with_locked_synchronizers); |
|
1060 VMThread::execute(&op); |
|
1061 } |
|
1062 |
|
1063 // Gets an array of ThreadInfo objects. Each element is the ThreadInfo |
|
1064 // for the thread ID specified in the corresponding entry in |
|
1065 // the given array of thread IDs; or NULL if the thread does not exist |
|
1066 // or has terminated. |
|
1067 // |
|
1068 // Input parameters: |
|
1069 // ids - array of thread IDs |
|
1070 // maxDepth - the maximum depth of stack traces to be dumped: |
|
1071 // maxDepth == -1 requests to dump entire stack trace. |
|
1072 // maxDepth == 0 requests no stack trace. |
|
1073 // infoArray - array of ThreadInfo objects |
|
1074 // |
|
1075 JVM_ENTRY(jint, jmm_GetThreadInfo(JNIEnv *env, jlongArray ids, jint maxDepth, jobjectArray infoArray)) |
|
1076 // Check if threads is null |
|
1077 if (ids == NULL || infoArray == NULL) { |
|
1078 THROW_(vmSymbols::java_lang_NullPointerException(), -1); |
|
1079 } |
|
1080 |
|
1081 if (maxDepth < -1) { |
|
1082 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), |
|
1083 "Invalid maxDepth", -1); |
|
1084 } |
|
1085 |
|
1086 ResourceMark rm(THREAD); |
|
1087 typeArrayOop ta = typeArrayOop(JNIHandles::resolve_non_null(ids)); |
|
1088 typeArrayHandle ids_ah(THREAD, ta); |
|
1089 |
|
1090 oop infoArray_obj = JNIHandles::resolve_non_null(infoArray); |
|
1091 objArrayOop oa = objArrayOop(infoArray_obj); |
|
1092 objArrayHandle infoArray_h(THREAD, oa); |
|
1093 |
|
1094 // validate the thread id array |
|
1095 validate_thread_id_array(ids_ah, CHECK_0); |
|
1096 |
|
1097 // validate the ThreadInfo[] parameters |
|
1098 validate_thread_info_array(infoArray_h, CHECK_0); |
|
1099 |
|
1100 // infoArray must be of the same length as the given array of thread IDs |
|
1101 int num_threads = ids_ah->length(); |
|
1102 if (num_threads != infoArray_h->length()) { |
|
1103 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), |
|
1104 "The length of the given ThreadInfo array does not match the length of the given array of thread IDs", -1); |
|
1105 } |
|
1106 |
|
1107 if (JDK_Version::is_gte_jdk16x_version()) { |
|
1108 // make sure the AbstractOwnableSynchronizer klass is loaded before taking thread snapshots |
|
1109 java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(CHECK_0); |
|
1110 } |
|
1111 |
|
1112 // Must use ThreadDumpResult to store the ThreadSnapshot. |
|
1113 // GC may occur after the thread snapshots are taken but before |
|
1114 // this function returns. The threadObj and other oops kept |
|
1115 // in the ThreadSnapshot are marked and adjusted during GC. |
|
1116 ThreadDumpResult dump_result(num_threads); |
|
1117 |
|
1118 if (maxDepth == 0) { |
|
1119 // no stack trace dumped - do not need to stop the world |
|
1120 { |
|
1121 MutexLockerEx ml(Threads_lock); |
|
1122 for (int i = 0; i < num_threads; i++) { |
|
1123 jlong tid = ids_ah->long_at(i); |
|
1124 JavaThread* jt = find_java_thread_from_id(tid); |
|
1125 ThreadSnapshot* ts; |
|
1126 if (jt == NULL) { |
|
1127 // if the thread does not exist or now it is terminated, |
|
1128 // create dummy snapshot |
|
1129 ts = new ThreadSnapshot(); |
|
1130 } else { |
|
1131 ts = new ThreadSnapshot(jt); |
|
1132 } |
|
1133 dump_result.add_thread_snapshot(ts); |
|
1134 } |
|
1135 } |
|
1136 } else { |
|
1137 // obtain thread dump with the specific list of threads with stack trace |
|
1138 |
|
1139 do_thread_dump(&dump_result, |
|
1140 ids_ah, |
|
1141 num_threads, |
|
1142 maxDepth, |
|
1143 false, /* no locked monitor */ |
|
1144 false, /* no locked synchronizers */ |
|
1145 CHECK_0); |
|
1146 } |
|
1147 |
|
1148 int num_snapshots = dump_result.num_snapshots(); |
|
1149 assert(num_snapshots == num_threads, "Must match the number of thread snapshots"); |
|
1150 int index = 0; |
|
1151 for (ThreadSnapshot* ts = dump_result.snapshots(); ts != NULL; index++, ts = ts->next()) { |
|
1152 // For each thread, create an java/lang/management/ThreadInfo object |
|
1153 // and fill with the thread information |
|
1154 |
|
1155 if (ts->threadObj() == NULL) { |
|
1156 // if the thread does not exist or now it is terminated, set threadinfo to NULL |
|
1157 infoArray_h->obj_at_put(index, NULL); |
|
1158 continue; |
|
1159 } |
|
1160 |
|
1161 // Create java.lang.management.ThreadInfo object |
|
1162 instanceOop info_obj = Management::create_thread_info_instance(ts, CHECK_0); |
|
1163 infoArray_h->obj_at_put(index, info_obj); |
|
1164 } |
|
1165 return 0; |
|
1166 JVM_END |
|
1167 |
|
1168 // Dump thread info for the specified threads. |
|
1169 // It returns an array of ThreadInfo objects. Each element is the ThreadInfo |
|
1170 // for the thread ID specified in the corresponding entry in |
|
1171 // the given array of thread IDs; or NULL if the thread does not exist |
|
1172 // or has terminated. |
|
1173 // |
|
1174 // Input parameter: |
|
1175 // ids - array of thread IDs; NULL indicates all live threads |
|
1176 // locked_monitors - if true, dump locked object monitors |
|
1177 // locked_synchronizers - if true, dump locked JSR-166 synchronizers |
|
1178 // |
|
1179 JVM_ENTRY(jobjectArray, jmm_DumpThreads(JNIEnv *env, jlongArray thread_ids, jboolean locked_monitors, jboolean locked_synchronizers)) |
|
1180 ResourceMark rm(THREAD); |
|
1181 |
|
1182 if (JDK_Version::is_gte_jdk16x_version()) { |
|
1183 // make sure the AbstractOwnableSynchronizer klass is loaded before taking thread snapshots |
|
1184 java_util_concurrent_locks_AbstractOwnableSynchronizer::initialize(CHECK_NULL); |
|
1185 } |
|
1186 |
|
1187 typeArrayOop ta = typeArrayOop(JNIHandles::resolve(thread_ids)); |
|
1188 int num_threads = (ta != NULL ? ta->length() : 0); |
|
1189 typeArrayHandle ids_ah(THREAD, ta); |
|
1190 |
|
1191 ThreadDumpResult dump_result(num_threads); // can safepoint |
|
1192 |
|
1193 if (ids_ah() != NULL) { |
|
1194 |
|
1195 // validate the thread id array |
|
1196 validate_thread_id_array(ids_ah, CHECK_NULL); |
|
1197 |
|
1198 // obtain thread dump of a specific list of threads |
|
1199 do_thread_dump(&dump_result, |
|
1200 ids_ah, |
|
1201 num_threads, |
|
1202 -1, /* entire stack */ |
|
1203 (locked_monitors ? true : false), /* with locked monitors */ |
|
1204 (locked_synchronizers ? true : false), /* with locked synchronizers */ |
|
1205 CHECK_NULL); |
|
1206 } else { |
|
1207 // obtain thread dump of all threads |
|
1208 VM_ThreadDump op(&dump_result, |
|
1209 -1, /* entire stack */ |
|
1210 (locked_monitors ? true : false), /* with locked monitors */ |
|
1211 (locked_synchronizers ? true : false) /* with locked synchronizers */); |
|
1212 VMThread::execute(&op); |
|
1213 } |
|
1214 |
|
1215 int num_snapshots = dump_result.num_snapshots(); |
|
1216 |
|
1217 // create the result ThreadInfo[] object |
|
1218 klassOop k = Management::java_lang_management_ThreadInfo_klass(CHECK_NULL); |
|
1219 instanceKlassHandle ik (THREAD, k); |
|
1220 objArrayOop r = oopFactory::new_objArray(ik(), num_snapshots, CHECK_NULL); |
|
1221 objArrayHandle result_h(THREAD, r); |
|
1222 |
|
1223 int index = 0; |
|
1224 for (ThreadSnapshot* ts = dump_result.snapshots(); ts != NULL; ts = ts->next(), index++) { |
|
1225 if (ts->threadObj() == NULL) { |
|
1226 // if the thread does not exist or now it is terminated, set threadinfo to NULL |
|
1227 result_h->obj_at_put(index, NULL); |
|
1228 continue; |
|
1229 } |
|
1230 |
|
1231 |
|
1232 |
|
1233 ThreadStackTrace* stacktrace = ts->get_stack_trace(); |
|
1234 assert(stacktrace != NULL, "Must have a stack trace dumped"); |
|
1235 |
|
1236 // Create Object[] filled with locked monitors |
|
1237 // Create int[] filled with the stack depth where a monitor was locked |
|
1238 int num_frames = stacktrace->get_stack_depth(); |
|
1239 int num_locked_monitors = stacktrace->num_jni_locked_monitors(); |
|
1240 |
|
1241 // Count the total number of locked monitors |
|
1242 for (int i = 0; i < num_frames; i++) { |
|
1243 StackFrameInfo* frame = stacktrace->stack_frame_at(i); |
|
1244 num_locked_monitors += frame->num_locked_monitors(); |
|
1245 } |
|
1246 |
|
1247 objArrayHandle monitors_array; |
|
1248 typeArrayHandle depths_array; |
|
1249 objArrayHandle synchronizers_array; |
|
1250 |
|
1251 if (locked_monitors) { |
|
1252 // Constructs Object[] and int[] to contain the object monitor and the stack depth |
|
1253 // where the thread locked it |
|
1254 objArrayOop array = oopFactory::new_system_objArray(num_locked_monitors, CHECK_NULL); |
|
1255 objArrayHandle mh(THREAD, array); |
|
1256 monitors_array = mh; |
|
1257 |
|
1258 typeArrayOop tarray = oopFactory::new_typeArray(T_INT, num_locked_monitors, CHECK_NULL); |
|
1259 typeArrayHandle dh(THREAD, tarray); |
|
1260 depths_array = dh; |
|
1261 |
|
1262 int count = 0; |
|
1263 int j = 0; |
|
1264 for (int depth = 0; depth < num_frames; depth++) { |
|
1265 StackFrameInfo* frame = stacktrace->stack_frame_at(depth); |
|
1266 int len = frame->num_locked_monitors(); |
|
1267 GrowableArray<oop>* locked_monitors = frame->locked_monitors(); |
|
1268 for (j = 0; j < len; j++) { |
|
1269 oop monitor = locked_monitors->at(j); |
|
1270 assert(monitor != NULL && monitor->is_instance(), "must be a Java object"); |
|
1271 monitors_array->obj_at_put(count, monitor); |
|
1272 depths_array->int_at_put(count, depth); |
|
1273 count++; |
|
1274 } |
|
1275 } |
|
1276 |
|
1277 GrowableArray<oop>* jni_locked_monitors = stacktrace->jni_locked_monitors(); |
|
1278 for (j = 0; j < jni_locked_monitors->length(); j++) { |
|
1279 oop object = jni_locked_monitors->at(j); |
|
1280 assert(object != NULL && object->is_instance(), "must be a Java object"); |
|
1281 monitors_array->obj_at_put(count, object); |
|
1282 // Monitor locked via JNI MonitorEnter call doesn't have stack depth info |
|
1283 depths_array->int_at_put(count, -1); |
|
1284 count++; |
|
1285 } |
|
1286 assert(count == num_locked_monitors, "number of locked monitors doesn't match"); |
|
1287 } |
|
1288 |
|
1289 if (locked_synchronizers) { |
|
1290 // Create Object[] filled with locked JSR-166 synchronizers |
|
1291 assert(ts->threadObj() != NULL, "Must be a valid JavaThread"); |
|
1292 ThreadConcurrentLocks* tcl = ts->get_concurrent_locks(); |
|
1293 GrowableArray<instanceOop>* locks = (tcl != NULL ? tcl->owned_locks() : NULL); |
|
1294 int num_locked_synchronizers = (locks != NULL ? locks->length() : 0); |
|
1295 |
|
1296 objArrayOop array = oopFactory::new_system_objArray(num_locked_synchronizers, CHECK_NULL); |
|
1297 objArrayHandle sh(THREAD, array); |
|
1298 synchronizers_array = sh; |
|
1299 |
|
1300 for (int k = 0; k < num_locked_synchronizers; k++) { |
|
1301 synchronizers_array->obj_at_put(k, locks->at(k)); |
|
1302 } |
|
1303 } |
|
1304 |
|
1305 // Create java.lang.management.ThreadInfo object |
|
1306 instanceOop info_obj = Management::create_thread_info_instance(ts, |
|
1307 monitors_array, |
|
1308 depths_array, |
|
1309 synchronizers_array, |
|
1310 CHECK_NULL); |
|
1311 result_h->obj_at_put(index, info_obj); |
|
1312 } |
|
1313 |
|
1314 return (jobjectArray) JNIHandles::make_local(env, result_h()); |
|
1315 JVM_END |
|
1316 |
|
1317 // Returns an array of Class objects. |
|
1318 JVM_ENTRY(jobjectArray, jmm_GetLoadedClasses(JNIEnv *env)) |
|
1319 ResourceMark rm(THREAD); |
|
1320 |
|
1321 LoadedClassesEnumerator lce(THREAD); // Pass current Thread as parameter |
|
1322 |
|
1323 int num_classes = lce.num_loaded_classes(); |
|
1324 objArrayOop r = oopFactory::new_objArray(SystemDictionary::class_klass(), num_classes, CHECK_0); |
|
1325 objArrayHandle classes_ah(THREAD, r); |
|
1326 |
|
1327 for (int i = 0; i < num_classes; i++) { |
|
1328 KlassHandle kh = lce.get_klass(i); |
|
1329 oop mirror = Klass::cast(kh())->java_mirror(); |
|
1330 classes_ah->obj_at_put(i, mirror); |
|
1331 } |
|
1332 |
|
1333 return (jobjectArray) JNIHandles::make_local(env, classes_ah()); |
|
1334 JVM_END |
|
1335 |
|
1336 // Reset statistic. Return true if the requested statistic is reset. |
|
1337 // Otherwise, return false. |
|
1338 // |
|
1339 // Input parameters: |
|
1340 // obj - specify which instance the statistic associated with to be reset |
|
1341 // For PEAK_POOL_USAGE stat, obj is required to be a memory pool object. |
|
1342 // For THREAD_CONTENTION_COUNT and TIME stat, obj is required to be a thread ID. |
|
1343 // type - the type of statistic to be reset |
|
1344 // |
|
1345 JVM_ENTRY(jboolean, jmm_ResetStatistic(JNIEnv *env, jvalue obj, jmmStatisticType type)) |
|
1346 ResourceMark rm(THREAD); |
|
1347 |
|
1348 switch (type) { |
|
1349 case JMM_STAT_PEAK_THREAD_COUNT: |
|
1350 ThreadService::reset_peak_thread_count(); |
|
1351 return true; |
|
1352 |
|
1353 case JMM_STAT_THREAD_CONTENTION_COUNT: |
|
1354 case JMM_STAT_THREAD_CONTENTION_TIME: { |
|
1355 jlong tid = obj.j; |
|
1356 if (tid < 0) { |
|
1357 THROW_(vmSymbols::java_lang_IllegalArgumentException(), JNI_FALSE); |
|
1358 } |
|
1359 |
|
1360 // Look for the JavaThread of this given tid |
|
1361 MutexLockerEx ml(Threads_lock); |
|
1362 if (tid == 0) { |
|
1363 // reset contention statistics for all threads if tid == 0 |
|
1364 for (JavaThread* java_thread = Threads::first(); java_thread != NULL; java_thread = java_thread->next()) { |
|
1365 if (type == JMM_STAT_THREAD_CONTENTION_COUNT) { |
|
1366 ThreadService::reset_contention_count_stat(java_thread); |
|
1367 } else { |
|
1368 ThreadService::reset_contention_time_stat(java_thread); |
|
1369 } |
|
1370 } |
|
1371 } else { |
|
1372 // reset contention statistics for a given thread |
|
1373 JavaThread* java_thread = find_java_thread_from_id(tid); |
|
1374 if (java_thread == NULL) { |
|
1375 return false; |
|
1376 } |
|
1377 |
|
1378 if (type == JMM_STAT_THREAD_CONTENTION_COUNT) { |
|
1379 ThreadService::reset_contention_count_stat(java_thread); |
|
1380 } else { |
|
1381 ThreadService::reset_contention_time_stat(java_thread); |
|
1382 } |
|
1383 } |
|
1384 return true; |
|
1385 break; |
|
1386 } |
|
1387 case JMM_STAT_PEAK_POOL_USAGE: { |
|
1388 jobject o = obj.l; |
|
1389 if (o == NULL) { |
|
1390 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE); |
|
1391 } |
|
1392 |
|
1393 oop pool_obj = JNIHandles::resolve(o); |
|
1394 assert(pool_obj->is_instance(), "Should be an instanceOop"); |
|
1395 instanceHandle ph(THREAD, (instanceOop) pool_obj); |
|
1396 |
|
1397 MemoryPool* pool = MemoryService::get_memory_pool(ph); |
|
1398 if (pool != NULL) { |
|
1399 pool->reset_peak_memory_usage(); |
|
1400 return true; |
|
1401 } |
|
1402 break; |
|
1403 } |
|
1404 case JMM_STAT_GC_STAT: { |
|
1405 jobject o = obj.l; |
|
1406 if (o == NULL) { |
|
1407 THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE); |
|
1408 } |
|
1409 |
|
1410 GCMemoryManager* mgr = get_gc_memory_manager_from_jobject(o, CHECK_0); |
|
1411 if (mgr != NULL) { |
|
1412 mgr->reset_gc_stat(); |
|
1413 return true; |
|
1414 } |
|
1415 break; |
|
1416 } |
|
1417 default: |
|
1418 assert(0, "Unknown Statistic Type"); |
|
1419 } |
|
1420 return false; |
|
1421 JVM_END |
|
1422 |
|
1423 // Returns the fast estimate of CPU time consumed by |
|
1424 // a given thread (in nanoseconds). |
|
1425 // If thread_id == 0, return CPU time for the current thread. |
|
1426 JVM_ENTRY(jlong, jmm_GetThreadCpuTime(JNIEnv *env, jlong thread_id)) |
|
1427 if (!os::is_thread_cpu_time_supported()) { |
|
1428 return -1; |
|
1429 } |
|
1430 |
|
1431 if (thread_id < 0) { |
|
1432 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), |
|
1433 "Invalid thread ID", -1); |
|
1434 } |
|
1435 |
|
1436 JavaThread* java_thread = NULL; |
|
1437 if (thread_id == 0) { |
|
1438 // current thread |
|
1439 return os::current_thread_cpu_time(); |
|
1440 } else { |
|
1441 MutexLockerEx ml(Threads_lock); |
|
1442 java_thread = find_java_thread_from_id(thread_id); |
|
1443 if (java_thread != NULL) { |
|
1444 return os::thread_cpu_time((Thread*) java_thread); |
|
1445 } |
|
1446 } |
|
1447 return -1; |
|
1448 JVM_END |
|
1449 |
|
1450 // Returns the CPU time consumed by a given thread (in nanoseconds). |
|
1451 // If thread_id == 0, CPU time for the current thread is returned. |
|
1452 // If user_sys_cpu_time = true, user level and system CPU time of |
|
1453 // a given thread is returned; otherwise, only user level CPU time |
|
1454 // is returned. |
|
1455 JVM_ENTRY(jlong, jmm_GetThreadCpuTimeWithKind(JNIEnv *env, jlong thread_id, jboolean user_sys_cpu_time)) |
|
1456 if (!os::is_thread_cpu_time_supported()) { |
|
1457 return -1; |
|
1458 } |
|
1459 |
|
1460 if (thread_id < 0) { |
|
1461 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), |
|
1462 "Invalid thread ID", -1); |
|
1463 } |
|
1464 |
|
1465 JavaThread* java_thread = NULL; |
|
1466 if (thread_id == 0) { |
|
1467 // current thread |
|
1468 return os::current_thread_cpu_time(user_sys_cpu_time != 0); |
|
1469 } else { |
|
1470 MutexLockerEx ml(Threads_lock); |
|
1471 java_thread = find_java_thread_from_id(thread_id); |
|
1472 if (java_thread != NULL) { |
|
1473 return os::thread_cpu_time((Thread*) java_thread, user_sys_cpu_time != 0); |
|
1474 } |
|
1475 } |
|
1476 return -1; |
|
1477 JVM_END |
|
1478 |
|
1479 // Returns a String array of all VM global flag names |
|
1480 JVM_ENTRY(jobjectArray, jmm_GetVMGlobalNames(JNIEnv *env)) |
|
1481 // last flag entry is always NULL, so subtract 1 |
|
1482 int nFlags = (int) Flag::numFlags - 1; |
|
1483 // allocate a temp array |
|
1484 objArrayOop r = oopFactory::new_objArray(SystemDictionary::string_klass(), |
|
1485 nFlags, CHECK_0); |
|
1486 objArrayHandle flags_ah(THREAD, r); |
|
1487 int num_entries = 0; |
|
1488 for (int i = 0; i < nFlags; i++) { |
|
1489 Flag* flag = &Flag::flags[i]; |
|
1490 // Exclude the diagnostic flags |
|
1491 if (flag->is_unlocked() || flag->is_unlocker()) { |
|
1492 Handle s = java_lang_String::create_from_str(flag->name, CHECK_0); |
|
1493 flags_ah->obj_at_put(num_entries, s()); |
|
1494 num_entries++; |
|
1495 } |
|
1496 } |
|
1497 |
|
1498 if (num_entries < nFlags) { |
|
1499 // Return array of right length |
|
1500 objArrayOop res = oopFactory::new_objArray(SystemDictionary::string_klass(), num_entries, CHECK_0); |
|
1501 for(int i = 0; i < num_entries; i++) { |
|
1502 res->obj_at_put(i, flags_ah->obj_at(i)); |
|
1503 } |
|
1504 return (jobjectArray)JNIHandles::make_local(env, res); |
|
1505 } |
|
1506 |
|
1507 return (jobjectArray)JNIHandles::make_local(env, flags_ah()); |
|
1508 JVM_END |
|
1509 |
|
1510 // utility function used by jmm_GetVMGlobals |
|
1511 void add_global_entry(JNIEnv* env, Handle name, jmmVMGlobal *global, Flag *flag, TRAPS) { |
|
1512 Handle flag_name; |
|
1513 if (name() == NULL) { |
|
1514 flag_name = java_lang_String::create_from_str(flag->name, CHECK); |
|
1515 } else { |
|
1516 flag_name = name; |
|
1517 } |
|
1518 global->name = (jstring)JNIHandles::make_local(env, flag_name()); |
|
1519 global->type = JMM_VMGLOBAL_TYPE_UNKNOWN; |
|
1520 |
|
1521 if (flag->is_bool()) { |
|
1522 global->value.z = flag->get_bool() ? JNI_TRUE : JNI_FALSE; |
|
1523 global->type = JMM_VMGLOBAL_TYPE_JBOOLEAN; |
|
1524 } else if (flag->is_intx()) { |
|
1525 global->value.j = (jlong)flag->get_intx(); |
|
1526 global->type = JMM_VMGLOBAL_TYPE_JLONG; |
|
1527 } else if (flag->is_uintx()) { |
|
1528 global->value.j = (jlong)flag->get_uintx(); |
|
1529 global->type = JMM_VMGLOBAL_TYPE_JLONG; |
|
1530 } else if (flag->is_ccstr()) { |
|
1531 Handle str = java_lang_String::create_from_str(flag->get_ccstr(), CHECK); |
|
1532 global->value.l = (jobject)JNIHandles::make_local(env, str()); |
|
1533 global->type = JMM_VMGLOBAL_TYPE_JSTRING; |
|
1534 } |
|
1535 |
|
1536 global->writeable = flag->is_writeable(); |
|
1537 global->external = flag->is_external(); |
|
1538 switch (flag->origin) { |
|
1539 case DEFAULT: |
|
1540 global->origin = JMM_VMGLOBAL_ORIGIN_DEFAULT; |
|
1541 break; |
|
1542 case COMMAND_LINE: |
|
1543 global->origin = JMM_VMGLOBAL_ORIGIN_COMMAND_LINE; |
|
1544 break; |
|
1545 case ENVIRON_VAR: |
|
1546 global->origin = JMM_VMGLOBAL_ORIGIN_ENVIRON_VAR; |
|
1547 break; |
|
1548 case CONFIG_FILE: |
|
1549 global->origin = JMM_VMGLOBAL_ORIGIN_CONFIG_FILE; |
|
1550 break; |
|
1551 case MANAGEMENT: |
|
1552 global->origin = JMM_VMGLOBAL_ORIGIN_MANAGEMENT; |
|
1553 break; |
|
1554 case ERGONOMIC: |
|
1555 global->origin = JMM_VMGLOBAL_ORIGIN_ERGONOMIC; |
|
1556 break; |
|
1557 default: |
|
1558 global->origin = JMM_VMGLOBAL_ORIGIN_OTHER; |
|
1559 } |
|
1560 } |
|
1561 |
|
1562 // Fill globals array of count length with jmmVMGlobal entries |
|
1563 // specified by names. If names == NULL, fill globals array |
|
1564 // with all Flags. Return value is number of entries |
|
1565 // created in globals. |
|
1566 // If a Flag with a given name in an array element does not |
|
1567 // exist, globals[i].name will be set to NULL. |
|
1568 JVM_ENTRY(jint, jmm_GetVMGlobals(JNIEnv *env, |
|
1569 jobjectArray names, |
|
1570 jmmVMGlobal *globals, |
|
1571 jint count)) |
|
1572 |
|
1573 |
|
1574 if (globals == NULL) { |
|
1575 THROW_(vmSymbols::java_lang_NullPointerException(), 0); |
|
1576 } |
|
1577 |
|
1578 ResourceMark rm(THREAD); |
|
1579 |
|
1580 if (names != NULL) { |
|
1581 // return the requested globals |
|
1582 objArrayOop ta = objArrayOop(JNIHandles::resolve_non_null(names)); |
|
1583 objArrayHandle names_ah(THREAD, ta); |
|
1584 // Make sure we have a String array |
|
1585 klassOop element_klass = objArrayKlass::cast(names_ah->klass())->element_klass(); |
|
1586 if (element_klass != SystemDictionary::string_klass()) { |
|
1587 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), |
|
1588 "Array element type is not String class", 0); |
|
1589 } |
|
1590 |
|
1591 int names_length = names_ah->length(); |
|
1592 int num_entries = 0; |
|
1593 for (int i = 0; i < names_length && i < count; i++) { |
|
1594 oop s = names_ah->obj_at(i); |
|
1595 if (s == NULL) { |
|
1596 THROW_(vmSymbols::java_lang_NullPointerException(), 0); |
|
1597 } |
|
1598 |
|
1599 Handle sh(THREAD, s); |
|
1600 char* str = java_lang_String::as_utf8_string(s); |
|
1601 Flag* flag = Flag::find_flag(str, strlen(str)); |
|
1602 if (flag != NULL) { |
|
1603 add_global_entry(env, sh, &globals[i], flag, THREAD); |
|
1604 num_entries++; |
|
1605 } else { |
|
1606 globals[i].name = NULL; |
|
1607 } |
|
1608 } |
|
1609 return num_entries; |
|
1610 } else { |
|
1611 // return all globals if names == NULL |
|
1612 |
|
1613 // last flag entry is always NULL, so subtract 1 |
|
1614 int nFlags = (int) Flag::numFlags - 1; |
|
1615 Handle null_h; |
|
1616 int num_entries = 0; |
|
1617 for (int i = 0; i < nFlags && num_entries < count; i++) { |
|
1618 Flag* flag = &Flag::flags[i]; |
|
1619 // Exclude the diagnostic flags |
|
1620 if (flag->is_unlocked() || flag->is_unlocker()) { |
|
1621 add_global_entry(env, null_h, &globals[num_entries], flag, THREAD); |
|
1622 num_entries++; |
|
1623 } |
|
1624 } |
|
1625 return num_entries; |
|
1626 } |
|
1627 JVM_END |
|
1628 |
|
1629 JVM_ENTRY(void, jmm_SetVMGlobal(JNIEnv *env, jstring flag_name, jvalue new_value)) |
|
1630 ResourceMark rm(THREAD); |
|
1631 |
|
1632 oop fn = JNIHandles::resolve_external_guard(flag_name); |
|
1633 if (fn == NULL) { |
|
1634 THROW_MSG(vmSymbols::java_lang_NullPointerException(), |
|
1635 "The flag name cannot be null."); |
|
1636 } |
|
1637 char* name = java_lang_String::as_utf8_string(fn); |
|
1638 Flag* flag = Flag::find_flag(name, strlen(name)); |
|
1639 if (flag == NULL) { |
|
1640 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), |
|
1641 "Flag does not exist."); |
|
1642 } |
|
1643 if (!flag->is_writeable()) { |
|
1644 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(), |
|
1645 "This flag is not writeable."); |
|
1646 } |
|
1647 |
|
1648 bool succeed; |
|
1649 if (flag->is_bool()) { |
|
1650 bool bvalue = (new_value.z == JNI_TRUE ? true : false); |
|
1651 succeed = CommandLineFlags::boolAtPut(name, &bvalue, MANAGEMENT); |
|
1652 } else if (flag->is_intx()) { |
|
1653 intx ivalue = new_value.j; |
|
1654 succeed = CommandLineFlags::intxAtPut(name, &ivalue, MANAGEMENT); |
|
1655 } else if (flag->is_uintx()) { |
|
1656 uintx uvalue = new_value.j; |
|
1657 succeed = CommandLineFlags::uintxAtPut(name, &uvalue, MANAGEMENT); |
|
1658 } else if (flag->is_ccstr()) { |
|
1659 oop str = JNIHandles::resolve_external_guard(new_value.l); |
|
1660 if (str == NULL) { |
|
1661 THROW(vmSymbols::java_lang_NullPointerException()); |
|
1662 } |
|
1663 ccstr svalue = java_lang_String::as_utf8_string(str); |
|
1664 succeed = CommandLineFlags::ccstrAtPut(name, &svalue, MANAGEMENT); |
|
1665 } |
|
1666 assert(succeed, "Setting flag should succeed"); |
|
1667 JVM_END |
|
1668 |
|
1669 class ThreadTimesClosure: public ThreadClosure { |
|
1670 private: |
|
1671 objArrayOop _names; |
|
1672 typeArrayOop _times; |
|
1673 int _names_len; |
|
1674 int _times_len; |
|
1675 int _count; |
|
1676 |
|
1677 public: |
|
1678 ThreadTimesClosure(objArrayOop names, typeArrayOop times); |
|
1679 virtual void do_thread(Thread* thread); |
|
1680 int count() { return _count; } |
|
1681 }; |
|
1682 |
|
1683 ThreadTimesClosure::ThreadTimesClosure(objArrayOop names, |
|
1684 typeArrayOop times) { |
|
1685 assert(names != NULL, "names was NULL"); |
|
1686 assert(times != NULL, "times was NULL"); |
|
1687 _names = names; |
|
1688 _names_len = names->length(); |
|
1689 _times = times; |
|
1690 _times_len = times->length(); |
|
1691 _count = 0; |
|
1692 } |
|
1693 |
|
1694 void ThreadTimesClosure::do_thread(Thread* thread) { |
|
1695 Handle s; |
|
1696 assert(thread != NULL, "thread was NULL"); |
|
1697 |
|
1698 // exclude externally visible JavaThreads |
|
1699 if (thread->is_Java_thread() && !thread->is_hidden_from_external_view()) { |
|
1700 return; |
|
1701 } |
|
1702 |
|
1703 if (_count >= _names_len || _count >= _times_len) { |
|
1704 // skip if the result array is not big enough |
|
1705 return; |
|
1706 } |
|
1707 |
|
1708 EXCEPTION_MARK; |
|
1709 |
|
1710 assert(thread->name() != NULL, "All threads should have a name"); |
|
1711 s = java_lang_String::create_from_str(thread->name(), CHECK); |
|
1712 _names->obj_at_put(_count, s()); |
|
1713 |
|
1714 _times->long_at_put(_count, os::is_thread_cpu_time_supported() ? |
|
1715 os::thread_cpu_time(thread) : -1); |
|
1716 _count++; |
|
1717 } |
|
1718 |
|
1719 // Fills names with VM internal thread names and times with the corresponding |
|
1720 // CPU times. If names or times is NULL, a NullPointerException is thrown. |
|
1721 // If the element type of names is not String, an IllegalArgumentException is |
|
1722 // thrown. |
|
1723 // If an array is not large enough to hold all the entries, only the entries |
|
1724 // that fit will be returned. Return value is the number of VM internal |
|
1725 // threads entries. |
|
1726 JVM_ENTRY(jint, jmm_GetInternalThreadTimes(JNIEnv *env, |
|
1727 jobjectArray names, |
|
1728 jlongArray times)) |
|
1729 if (names == NULL || times == NULL) { |
|
1730 THROW_(vmSymbols::java_lang_NullPointerException(), 0); |
|
1731 } |
|
1732 objArrayOop na = objArrayOop(JNIHandles::resolve_non_null(names)); |
|
1733 objArrayHandle names_ah(THREAD, na); |
|
1734 |
|
1735 // Make sure we have a String array |
|
1736 klassOop element_klass = objArrayKlass::cast(names_ah->klass())->element_klass(); |
|
1737 if (element_klass != SystemDictionary::string_klass()) { |
|
1738 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), |
|
1739 "Array element type is not String class", 0); |
|
1740 } |
|
1741 |
|
1742 typeArrayOop ta = typeArrayOop(JNIHandles::resolve_non_null(times)); |
|
1743 typeArrayHandle times_ah(THREAD, ta); |
|
1744 |
|
1745 ThreadTimesClosure ttc(names_ah(), times_ah()); |
|
1746 { |
|
1747 MutexLockerEx ml(Threads_lock); |
|
1748 Threads::threads_do(&ttc); |
|
1749 } |
|
1750 |
|
1751 return ttc.count(); |
|
1752 JVM_END |
|
1753 |
|
1754 static Handle find_deadlocks(bool object_monitors_only, TRAPS) { |
|
1755 ResourceMark rm(THREAD); |
|
1756 |
|
1757 VM_FindDeadlocks op(!object_monitors_only /* also check concurrent locks? */); |
|
1758 VMThread::execute(&op); |
|
1759 |
|
1760 DeadlockCycle* deadlocks = op.result(); |
|
1761 if (deadlocks == NULL) { |
|
1762 // no deadlock found and return |
|
1763 return Handle(); |
|
1764 } |
|
1765 |
|
1766 int num_threads = 0; |
|
1767 DeadlockCycle* cycle; |
|
1768 for (cycle = deadlocks; cycle != NULL; cycle = cycle->next()) { |
|
1769 num_threads += cycle->num_threads(); |
|
1770 } |
|
1771 |
|
1772 objArrayOop r = oopFactory::new_objArray(SystemDictionary::thread_klass(), num_threads, CHECK_NH); |
|
1773 objArrayHandle threads_ah(THREAD, r); |
|
1774 |
|
1775 int index = 0; |
|
1776 for (cycle = deadlocks; cycle != NULL; cycle = cycle->next()) { |
|
1777 GrowableArray<JavaThread*>* deadlock_threads = cycle->threads(); |
|
1778 int len = deadlock_threads->length(); |
|
1779 for (int i = 0; i < len; i++) { |
|
1780 threads_ah->obj_at_put(index, deadlock_threads->at(i)->threadObj()); |
|
1781 index++; |
|
1782 } |
|
1783 } |
|
1784 return threads_ah; |
|
1785 } |
|
1786 |
|
1787 // Finds cycles of threads that are deadlocked involved in object monitors |
|
1788 // and JSR-166 synchronizers. |
|
1789 // Returns an array of Thread objects which are in deadlock, if any. |
|
1790 // Otherwise, returns NULL. |
|
1791 // |
|
1792 // Input parameter: |
|
1793 // object_monitors_only - if true, only check object monitors |
|
1794 // |
|
1795 JVM_ENTRY(jobjectArray, jmm_FindDeadlockedThreads(JNIEnv *env, jboolean object_monitors_only)) |
|
1796 Handle result = find_deadlocks(object_monitors_only != 0, CHECK_0); |
|
1797 return (jobjectArray) JNIHandles::make_local(env, result()); |
|
1798 JVM_END |
|
1799 |
|
1800 // Finds cycles of threads that are deadlocked on monitor locks |
|
1801 // Returns an array of Thread objects which are in deadlock, if any. |
|
1802 // Otherwise, returns NULL. |
|
1803 JVM_ENTRY(jobjectArray, jmm_FindMonitorDeadlockedThreads(JNIEnv *env)) |
|
1804 Handle result = find_deadlocks(true, CHECK_0); |
|
1805 return (jobjectArray) JNIHandles::make_local(env, result()); |
|
1806 JVM_END |
|
1807 |
|
1808 // Gets the information about GC extension attributes including |
|
1809 // the name of the attribute, its type, and a short description. |
|
1810 // |
|
1811 // Input parameters: |
|
1812 // mgr - GC memory manager |
|
1813 // info - caller allocated array of jmmExtAttributeInfo |
|
1814 // count - number of elements of the info array |
|
1815 // |
|
1816 // Returns the number of GC extension attributes filled in the info array; or |
|
1817 // -1 if info is not big enough |
|
1818 // |
|
1819 JVM_ENTRY(jint, jmm_GetGCExtAttributeInfo(JNIEnv *env, jobject mgr, jmmExtAttributeInfo* info, jint count)) |
|
1820 // All GC memory managers have 1 attribute (number of GC threads) |
|
1821 if (count == 0) { |
|
1822 return 0; |
|
1823 } |
|
1824 |
|
1825 if (info == NULL) { |
|
1826 THROW_(vmSymbols::java_lang_NullPointerException(), 0); |
|
1827 } |
|
1828 |
|
1829 info[0].name = "GcThreadCount"; |
|
1830 info[0].type = 'I'; |
|
1831 info[0].description = "Number of GC threads"; |
|
1832 return 1; |
|
1833 JVM_END |
|
1834 |
|
1835 // verify the given array is an array of java/lang/management/MemoryUsage objects |
|
1836 // of a given length and return the objArrayOop |
|
1837 static objArrayOop get_memory_usage_objArray(jobjectArray array, int length, TRAPS) { |
|
1838 if (array == NULL) { |
|
1839 THROW_(vmSymbols::java_lang_NullPointerException(), 0); |
|
1840 } |
|
1841 |
|
1842 objArrayOop oa = objArrayOop(JNIHandles::resolve_non_null(array)); |
|
1843 objArrayHandle array_h(THREAD, oa); |
|
1844 |
|
1845 // array must be of the given length |
|
1846 if (length != array_h->length()) { |
|
1847 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), |
|
1848 "The length of the given MemoryUsage array does not match the number of memory pools.", 0); |
|
1849 } |
|
1850 |
|
1851 // check if the element of array is of type MemoryUsage class |
|
1852 klassOop usage_klass = Management::java_lang_management_MemoryUsage_klass(CHECK_0); |
|
1853 klassOop element_klass = objArrayKlass::cast(array_h->klass())->element_klass(); |
|
1854 if (element_klass != usage_klass) { |
|
1855 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(), |
|
1856 "The element type is not MemoryUsage class", 0); |
|
1857 } |
|
1858 |
|
1859 return array_h(); |
|
1860 } |
|
1861 |
|
1862 // Gets the statistics of the last GC of a given GC memory manager. |
|
1863 // Input parameters: |
|
1864 // obj - GarbageCollectorMXBean object |
|
1865 // gc_stat - caller allocated jmmGCStat where: |
|
1866 // a. before_gc_usage - array of MemoryUsage objects |
|
1867 // b. after_gc_usage - array of MemoryUsage objects |
|
1868 // c. gc_ext_attributes_values_size is set to the |
|
1869 // gc_ext_attribute_values array allocated |
|
1870 // d. gc_ext_attribute_values is a caller allocated array of jvalue. |
|
1871 // |
|
1872 // On return, |
|
1873 // gc_index == 0 indicates no GC statistics available |
|
1874 // |
|
1875 // before_gc_usage and after_gc_usage - filled with per memory pool |
|
1876 // before and after GC usage in the same order as the memory pools |
|
1877 // returned by GetMemoryPools for a given GC memory manager. |
|
1878 // num_gc_ext_attributes indicates the number of elements in |
|
1879 // the gc_ext_attribute_values array is filled; or |
|
1880 // -1 if the gc_ext_attributes_values array is not big enough |
|
1881 // |
|
1882 JVM_ENTRY(void, jmm_GetLastGCStat(JNIEnv *env, jobject obj, jmmGCStat *gc_stat)) |
|
1883 ResourceMark rm(THREAD); |
|
1884 |
|
1885 if (gc_stat->gc_ext_attribute_values_size > 0 && gc_stat->gc_ext_attribute_values == NULL) { |
|
1886 THROW(vmSymbols::java_lang_NullPointerException()); |
|
1887 } |
|
1888 |
|
1889 // Get the GCMemoryManager |
|
1890 GCMemoryManager* mgr = get_gc_memory_manager_from_jobject(obj, CHECK); |
|
1891 if (mgr->last_gc_stat() == NULL) { |
|
1892 gc_stat->gc_index = 0; |
|
1893 return; |
|
1894 } |
|
1895 |
|
1896 // Make a copy of the last GC statistics |
|
1897 // GC may occur while constructing the last GC information |
|
1898 int num_pools = MemoryService::num_memory_pools(); |
|
1899 GCStatInfo* stat = new GCStatInfo(num_pools); |
|
1900 stat->copy_stat(mgr->last_gc_stat()); |
|
1901 |
|
1902 gc_stat->gc_index = stat->gc_index(); |
|
1903 gc_stat->start_time = Management::ticks_to_ms(stat->start_time()); |
|
1904 gc_stat->end_time = Management::ticks_to_ms(stat->end_time()); |
|
1905 |
|
1906 // Current implementation does not have GC extension attributes |
|
1907 gc_stat->num_gc_ext_attributes = 0; |
|
1908 |
|
1909 // Fill the arrays of MemoryUsage objects with before and after GC |
|
1910 // per pool memory usage |
|
1911 objArrayOop bu = get_memory_usage_objArray(gc_stat->usage_before_gc, |
|
1912 num_pools, |
|
1913 CHECK); |
|
1914 objArrayHandle usage_before_gc_ah(THREAD, bu); |
|
1915 |
|
1916 objArrayOop au = get_memory_usage_objArray(gc_stat->usage_after_gc, |
|
1917 num_pools, |
|
1918 CHECK); |
|
1919 objArrayHandle usage_after_gc_ah(THREAD, au); |
|
1920 |
|
1921 for (int i = 0; i < num_pools; i++) { |
|
1922 Handle before_usage = MemoryService::create_MemoryUsage_obj(stat->before_gc_usage_for_pool(i), CHECK); |
|
1923 Handle after_usage; |
|
1924 |
|
1925 MemoryUsage u = stat->after_gc_usage_for_pool(i); |
|
1926 if (u.max_size() == 0 && u.used() > 0) { |
|
1927 // If max size == 0, this pool is a survivor space. |
|
1928 // Set max size = -1 since the pools will be swapped after GC. |
|
1929 MemoryUsage usage(u.init_size(), u.used(), u.committed(), (size_t)-1); |
|
1930 after_usage = MemoryService::create_MemoryUsage_obj(usage, CHECK); |
|
1931 } else { |
|
1932 after_usage = MemoryService::create_MemoryUsage_obj(stat->after_gc_usage_for_pool(i), CHECK); |
|
1933 } |
|
1934 usage_before_gc_ah->obj_at_put(i, before_usage()); |
|
1935 usage_after_gc_ah->obj_at_put(i, after_usage()); |
|
1936 } |
|
1937 |
|
1938 if (gc_stat->gc_ext_attribute_values_size > 0) { |
|
1939 // Current implementation only has 1 attribute (number of GC threads) |
|
1940 // The type is 'I' |
|
1941 gc_stat->gc_ext_attribute_values[0].i = mgr->num_gc_threads(); |
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1942 } |
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1943 JVM_END |
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1944 |
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1945 // Dump heap - Returns 0 if succeeds. |
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1946 JVM_ENTRY(jint, jmm_DumpHeap0(JNIEnv *env, jstring outputfile, jboolean live)) |
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1947 #ifndef SERVICES_KERNEL |
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1948 ResourceMark rm(THREAD); |
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1949 oop on = JNIHandles::resolve_external_guard(outputfile); |
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1950 if (on == NULL) { |
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1951 THROW_MSG_(vmSymbols::java_lang_NullPointerException(), |
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1952 "Output file name cannot be null.", -1); |
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1953 } |
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1954 char* name = java_lang_String::as_utf8_string(on); |
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1955 if (name == NULL) { |
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1956 THROW_MSG_(vmSymbols::java_lang_NullPointerException(), |
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1957 "Output file name cannot be null.", -1); |
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1958 } |
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1959 HeapDumper dumper(live ? true : false); |
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1960 if (dumper.dump(name) != 0) { |
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1961 const char* errmsg = dumper.error_as_C_string(); |
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1962 THROW_MSG_(vmSymbols::java_io_IOException(), errmsg, -1); |
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1963 } |
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1964 return 0; |
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1965 #else // SERVICES_KERNEL |
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1966 return -1; |
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1967 #endif // SERVICES_KERNEL |
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1968 JVM_END |
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1969 |
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1970 jlong Management::ticks_to_ms(jlong ticks) { |
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1971 assert(os::elapsed_frequency() > 0, "Must be non-zero"); |
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1972 return (jlong)(((double)ticks / (double)os::elapsed_frequency()) |
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1973 * (double)1000.0); |
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1974 } |
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1975 |
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1976 const struct jmmInterface_1_ jmm_interface = { |
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1977 NULL, |
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1978 NULL, |
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1979 jmm_GetVersion, |
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1980 jmm_GetOptionalSupport, |
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1981 jmm_GetInputArguments, |
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1982 jmm_GetThreadInfo, |
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1983 jmm_GetInputArgumentArray, |
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1984 jmm_GetMemoryPools, |
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1985 jmm_GetMemoryManagers, |
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1986 jmm_GetMemoryPoolUsage, |
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1987 jmm_GetPeakMemoryPoolUsage, |
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1988 NULL, |
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1989 jmm_GetMemoryUsage, |
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1990 jmm_GetLongAttribute, |
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1991 jmm_GetBoolAttribute, |
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1992 jmm_SetBoolAttribute, |
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1993 jmm_GetLongAttributes, |
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1994 jmm_FindMonitorDeadlockedThreads, |
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1995 jmm_GetThreadCpuTime, |
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1996 jmm_GetVMGlobalNames, |
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1997 jmm_GetVMGlobals, |
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1998 jmm_GetInternalThreadTimes, |
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1999 jmm_ResetStatistic, |
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2000 jmm_SetPoolSensor, |
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2001 jmm_SetPoolThreshold, |
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2002 jmm_GetPoolCollectionUsage, |
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2003 jmm_GetGCExtAttributeInfo, |
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2004 jmm_GetLastGCStat, |
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2005 jmm_GetThreadCpuTimeWithKind, |
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2006 NULL, |
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2007 jmm_DumpHeap0, |
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2008 jmm_FindDeadlockedThreads, |
|
2009 jmm_SetVMGlobal, |
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2010 NULL, |
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2011 jmm_DumpThreads |
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2012 }; |
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2013 |
|
2014 void* Management::get_jmm_interface(int version) { |
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2015 if (version == JMM_VERSION_1_0) { |
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2016 return (void*) &jmm_interface; |
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2017 } |
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2018 return NULL; |
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2019 } |