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annotate test/testlibrary/whitebox/sun/hotspot/WhiteBox.java @ 21384:30fe503e1c46

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author Christian Wimmer <christian.wimmer@oracle.com>
date Thu, 14 May 2015 16:09:15 -0700
parents 887a7cedb892
children
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1 /*
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2 * Copyright (c) 2012, 2014, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 *
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23 */
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24
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25 package sun.hotspot;
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26
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27 import java.lang.reflect.Executable;
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28 import java.util.Arrays;
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29 import java.util.List;
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30 import java.util.function.Function;
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31 import java.util.stream.Stream;
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32 import java.security.BasicPermission;
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33 import java.net.URL;
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34
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35 import sun.hotspot.parser.DiagnosticCommand;
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36
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37 public class WhiteBox {
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38
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39 @SuppressWarnings("serial")
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40 public static class WhiteBoxPermission extends BasicPermission {
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41 public WhiteBoxPermission(String s) {
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42 super(s);
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43 }
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44 }
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45
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46 private WhiteBox() {}
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47 private static final WhiteBox instance = new WhiteBox();
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48 private static native void registerNatives();
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49
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50 /**
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51 * Returns the singleton WhiteBox instance.
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52 *
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53 * The returned WhiteBox object should be carefully guarded
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54 * by the caller, since it can be used to read and write data
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55 * at arbitrary memory addresses. It must never be passed to
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56 * untrusted code.
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57 */
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58 public synchronized static WhiteBox getWhiteBox() {
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59 SecurityManager sm = System.getSecurityManager();
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60 if (sm != null) {
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61 sm.checkPermission(new WhiteBoxPermission("getInstance"));
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62 }
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63 return instance;
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64 }
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65
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66 static {
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67 registerNatives();
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68 }
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69
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70 // Get the maximum heap size supporting COOPs
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71 public native long getCompressedOopsMaxHeapSize();
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72 // Arguments
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73 public native void printHeapSizes();
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74
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75 // Memory
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76 public native long getObjectAddress(Object o);
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77 public native int getHeapOopSize();
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78 public native boolean isObjectInOldGen(Object o);
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79 public native long getObjectSize(Object o);
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80
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81 // Runtime
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82 // Make sure class name is in the correct format
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83 public boolean isClassAlive(String name) {
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84 return isClassAlive0(name.replace('.', '/'));
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85 }
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86 private native boolean isClassAlive0(String name);
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87
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88 // Resource/Class Lookup Cache
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89 public native boolean classKnownToNotExist(ClassLoader loader, String name);
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90 public native URL[] getLookupCacheURLs(ClassLoader loader);
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91 public native int[] getLookupCacheMatches(ClassLoader loader, String name);
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92
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93 // JVMTI
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94 public native void addToBootstrapClassLoaderSearch(String segment);
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95 public native void addToSystemClassLoaderSearch(String segment);
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96
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97 // G1
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98 public native boolean g1InConcurrentMark();
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99 public native boolean g1IsHumongous(Object o);
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100 public native long g1NumFreeRegions();
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101 public native int g1RegionSize();
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102 public native Object[] parseCommandLine(String commandline, DiagnosticCommand[] args);
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103
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104 // NMT
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105 public native long NMTMalloc(long size);
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106 public native void NMTFree(long mem);
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107 public native long NMTReserveMemory(long size);
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108 public native void NMTCommitMemory(long addr, long size);
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109 public native void NMTUncommitMemory(long addr, long size);
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110 public native void NMTReleaseMemory(long addr, long size);
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111 public native long NMTMallocWithPseudoStack(long size, int index);
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112 public native boolean NMTIsDetailSupported();
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113 public native boolean NMTChangeTrackingLevel();
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114 public native int NMTGetHashSize();
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115
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116 // Compiler
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117 public native void deoptimizeAll();
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118 public boolean isMethodCompiled(Executable method) {
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119 return isMethodCompiled(method, false /*not osr*/);
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120 }
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121 public native boolean isMethodCompiled(Executable method, boolean isOsr);
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122 public boolean isMethodCompilable(Executable method) {
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123 return isMethodCompilable(method, -1 /*any*/);
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124 }
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125 public boolean isMethodCompilable(Executable method, int compLevel) {
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126 return isMethodCompilable(method, compLevel, false /*not osr*/);
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127 }
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128 public native boolean isMethodCompilable(Executable method, int compLevel, boolean isOsr);
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129 public native boolean isMethodQueuedForCompilation(Executable method);
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130 public int deoptimizeMethod(Executable method) {
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131 return deoptimizeMethod(method, false /*not osr*/);
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132 }
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133 public native int deoptimizeMethod(Executable method, boolean isOsr);
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134 public void makeMethodNotCompilable(Executable method) {
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135 makeMethodNotCompilable(method, -1 /*any*/);
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136 }
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137 public void makeMethodNotCompilable(Executable method, int compLevel) {
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138 makeMethodNotCompilable(method, compLevel, false /*not osr*/);
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139 }
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140 public native void makeMethodNotCompilable(Executable method, int compLevel, boolean isOsr);
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141 public int getMethodCompilationLevel(Executable method) {
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142 return getMethodCompilationLevel(method, false /*not ost*/);
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143 }
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144 public native int getMethodCompilationLevel(Executable method, boolean isOsr);
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145 public native boolean testSetDontInlineMethod(Executable method, boolean value);
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146 public int getCompileQueuesSize() {
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147 return getCompileQueueSize(-1 /*any*/);
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148 }
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149 public native int getCompileQueueSize(int compLevel);
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150 public native boolean testSetForceInlineMethod(Executable method, boolean value);
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151 public boolean enqueueMethodForCompilation(Executable method, int compLevel) {
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152 return enqueueMethodForCompilation(method, compLevel, -1 /*InvocationEntryBci*/);
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153 }
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154 public native boolean enqueueMethodForCompilation(Executable method, int compLevel, int entry_bci);
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155 public native void clearMethodState(Executable method);
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156 public native int getMethodEntryBci(Executable method);
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157 public native Object[] getNMethod(Executable method, boolean isOsr);
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158
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159 // Intered strings
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160 public native boolean isInStringTable(String str);
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161
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162 // Memory
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163 public native void readReservedMemory();
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164 public native long allocateMetaspace(ClassLoader classLoader, long size);
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165 public native void freeMetaspace(ClassLoader classLoader, long addr, long size);
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166 public native long incMetaspaceCapacityUntilGC(long increment);
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167 public native long metaspaceCapacityUntilGC();
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168
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169 // force Young GC
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170 public native void youngGC();
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171
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172 // force Full GC
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173 public native void fullGC();
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174
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175 // Tests on ReservedSpace/VirtualSpace classes
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176 public native int stressVirtualSpaceResize(long reservedSpaceSize, long magnitude, long iterations);
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177 public native void runMemoryUnitTests();
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178 public native void readFromNoaccessArea();
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179 public native long getThreadStackSize();
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180 public native long getThreadRemainingStackSize();
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181
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182 // CPU features
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183 public native String getCPUFeatures();
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184
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185 // Native extensions
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186 public native long getHeapUsageForContext(int context);
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187 public native long getHeapRegionCountForContext(int context);
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188 public native int getContextForObject(Object obj);
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189 public native void printRegionInfo(int context);
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190
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191 // VM flags
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192 public native void setBooleanVMFlag(String name, boolean value);
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193 public native void setIntxVMFlag(String name, long value);
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194 public native void setUintxVMFlag(String name, long value);
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195 public native void setUint64VMFlag(String name, long value);
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196 public native void setStringVMFlag(String name, String value);
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197 public native void setDoubleVMFlag(String name, double value);
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198 public native Boolean getBooleanVMFlag(String name);
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199 public native Long getIntxVMFlag(String name);
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200 public native Long getUintxVMFlag(String name);
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201 public native Long getUint64VMFlag(String name);
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202 public native String getStringVMFlag(String name);
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203 public native Double getDoubleVMFlag(String name);
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204 private final List<Function<String,Object>> flagsGetters = Arrays.asList(
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205 this::getBooleanVMFlag, this::getIntxVMFlag, this::getUintxVMFlag,
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206 this::getUint64VMFlag, this::getStringVMFlag, this::getDoubleVMFlag);
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207
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208 public Object getVMFlag(String name) {
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209 return flagsGetters.stream()
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210 .map(f -> f.apply(name))
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211 .filter(x -> x != null)
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212 .findAny()
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213 .orElse(null);
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214 }
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215 public native int getOffsetForName0(String name);
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216 public int getOffsetForName(String name) throws Exception {
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217 int offset = getOffsetForName0(name);
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218 if (offset == -1) {
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219 throw new RuntimeException(name + " not found");
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220 }
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221 return offset;
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222 }
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223
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224 }