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1 /* |
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2 * Copyright (c) 2016, 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 import sun.jvm.hotspot.memory.SymbolTable; |
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25 import sun.jvm.hotspot.oops.Symbol; |
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26 import sun.jvm.hotspot.runtime.VM; |
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27 import sun.jvm.hotspot.tools.Tool; |
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28 |
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29 /** |
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30 * This class is launched in a sub-process by the main test, |
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31 * SASymbolTableTest.java. |
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32 * |
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33 * It uses SA to connect to another JVM process, whose PID is specified in args[]. |
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34 * The purpose of the test is to validate that we can walk the SymbolTable |
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35 * and CompactHashTable of the other process. Everything should work regardless |
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36 * of whether the other process runs in CDS mode or not. |
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37 * |
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38 * Note: CompactHashTable is used only when CDS is enabled. |
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39 */ |
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40 public class SASymbolTableTestAgent extends Tool { |
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41 public SASymbolTableTestAgent() { |
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42 super(); |
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43 } |
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44 public static void main(String args[]) { |
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45 SASymbolTableTestAgent tool = new SASymbolTableTestAgent(); |
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46 tool.execute(args); |
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47 } |
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48 |
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49 static String[] commonNames = { |
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50 "java/lang/Object", |
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51 "java/lang/String", |
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52 "java/lang/Class", |
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53 "java/lang/Cloneable", |
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54 "java/lang/ClassLoader", |
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55 "java/io/Serializable", |
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56 "java/lang/System", |
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57 "java/lang/Throwable", |
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58 "java/lang/Error", |
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59 "java/lang/ThreadDeath", |
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60 "java/lang/Exception", |
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61 "java/lang/RuntimeException", |
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62 "java/lang/SecurityManager", |
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63 "java/security/ProtectionDomain", |
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64 "java/security/AccessControlContext", |
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65 "java/security/SecureClassLoader", |
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66 "java/lang/ClassNotFoundException", |
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67 "java/lang/NoClassDefFoundError", |
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68 "java/lang/LinkageError", |
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69 "java/lang/ClassCastException", |
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70 "java/lang/ArrayStoreException", |
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71 "java/lang/VirtualMachineError", |
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72 "java/lang/OutOfMemoryError", |
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73 "java/lang/StackOverflowError", |
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74 "java/lang/IllegalMonitorStateException", |
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75 "java/lang/ref/Reference", |
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76 "java/lang/ref/SoftReference", |
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77 "java/lang/ref/WeakReference", |
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78 "java/lang/ref/FinalReference", |
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79 "java/lang/ref/PhantomReference", |
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80 "java/lang/ref/Finalizer", |
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81 "java/lang/Thread", |
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82 "java/lang/ThreadGroup", |
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83 "java/util/Properties", |
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84 "java/lang/reflect/AccessibleObject", |
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85 "java/lang/reflect/Field", |
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86 "java/lang/reflect/Method", |
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87 "java/lang/reflect/Constructor", |
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88 "java/lang/invoke/MethodHandle", |
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89 "java/lang/invoke/MemberName", |
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90 "java/lang/invoke/MethodHandleNatives", |
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91 "java/lang/invoke/MethodType", |
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92 "java/lang/BootstrapMethodError", |
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93 "java/lang/invoke/CallSite", |
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94 "java/lang/invoke/ConstantCallSite", |
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95 "java/lang/invoke/MutableCallSite", |
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96 "java/lang/invoke/VolatileCallSite", |
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97 "java/lang/StringBuffer", |
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98 "java/lang/StringBuilder", |
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99 "java/io/ByteArrayInputStream", |
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100 "java/io/File", |
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101 "java/net/URLClassLoader", |
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102 "java/net/URL", |
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103 "java/util/jar/Manifest", |
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104 "java/security/CodeSource", |
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105 }; |
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106 |
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107 static String[] badNames = { |
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108 "java/lang/badbadbad", |
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109 "java/io/badbadbadbad", |
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110 "this*symbol*must*not*exist" |
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111 }; |
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112 |
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113 public void run() { |
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114 System.out.println("SASymbolTableTestAgent: starting"); |
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115 VM vm = VM.getVM(); |
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116 SymbolTable table = vm.getSymbolTable(); |
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117 |
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118 // (a) These are names that are likely to exist in the symbol table |
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119 // of a JVM after start-up. They were taken from vmSymbols.hpp |
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120 // during the middle of JDK9 development. |
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121 // |
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122 // The purpose is not to check that each name must exist (a future |
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123 // version of JDK may not preload some of the classes). |
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124 // |
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125 // The purpose of this loops is to ensure that we check a lot of symbols, |
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126 // so we will (most likely) hit on both VALUE_ONLY_BUCKET_TYPE and normal bucket type |
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127 // in CompactHashTable.probe(). |
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128 for (String n : commonNames) { |
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129 Symbol s = table.probe(n); |
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130 System.out.format("%-40s = %s\n", n, s); |
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131 } |
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132 |
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133 System.out.println("======================================================================"); |
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134 |
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135 // (b) Also test a few strings that are known to not exist in the table. This will |
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136 // both the compact table (if it exists) and the regular table to be walked. |
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137 for (String n : badNames) { |
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138 Symbol s = table.probe(n); |
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139 System.out.format("%-40s = %s\n", n, s); |
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140 } |
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141 } |
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142 } |