Mercurial > hg > graal-compiler
annotate agent/src/share/classes/sun/jvm/hotspot/memory/SystemDictionary.java @ 4864:b2cd0ee8f778
7114376: Make system dictionary hashtable bucket array size configurable
Summary: 7u4 new experimental flag -XX:PredictedClassLoadedCount=#
Reviewed-by: dholmes, phh, dcubed
| author | acorn |
|---|---|
| date | Mon, 30 Jan 2012 23:27:30 -0500 |
| parents | 7588156f5cf9 |
| children | da91efe96a93 |
| rev | line source |
|---|---|
| 0 | 1 /* |
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7114376: Make system dictionary hashtable bucket array size configurable
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2 * Copyright (c) 2001, 2012, Oracle and/or its affiliates. All rights reserved. |
| 0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
|
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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. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 25 package sun.jvm.hotspot.memory; | |
| 26 | |
| 27 import java.util.*; | |
| 28 import sun.jvm.hotspot.debugger.*; | |
| 29 import sun.jvm.hotspot.oops.*; | |
| 30 import sun.jvm.hotspot.runtime.*; | |
| 31 import sun.jvm.hotspot.types.*; | |
| 32 | |
| 33 public class SystemDictionary { | |
| 34 private static AddressField dictionaryField; | |
| 35 private static AddressField sharedDictionaryField; | |
| 36 private static AddressField placeholdersField; | |
| 37 private static AddressField loaderConstraintTableField; | |
| 147 | 38 private static sun.jvm.hotspot.types.OopField javaSystemLoaderField; |
| 0 | 39 |
| 147 | 40 private static sun.jvm.hotspot.types.OopField objectKlassField; |
| 41 private static sun.jvm.hotspot.types.OopField classLoaderKlassField; | |
| 42 private static sun.jvm.hotspot.types.OopField stringKlassField; | |
| 43 private static sun.jvm.hotspot.types.OopField systemKlassField; | |
| 44 private static sun.jvm.hotspot.types.OopField threadKlassField; | |
| 45 private static sun.jvm.hotspot.types.OopField threadGroupKlassField; | |
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46 private static sun.jvm.hotspot.types.OopField methodHandleKlassField; |
| 0 | 47 |
| 48 static { | |
| 49 VM.registerVMInitializedObserver(new Observer() { | |
| 50 public void update(Observable o, Object data) { | |
| 51 initialize(VM.getVM().getTypeDataBase()); | |
| 52 } | |
| 53 }); | |
| 54 } | |
| 55 | |
| 56 private static synchronized void initialize(TypeDataBase db) { | |
| 57 Type type = db.lookupType("SystemDictionary"); | |
| 58 | |
| 59 dictionaryField = type.getAddressField("_dictionary"); | |
| 60 sharedDictionaryField = type.getAddressField("_shared_dictionary"); | |
| 61 placeholdersField = type.getAddressField("_placeholders"); | |
| 62 loaderConstraintTableField = type.getAddressField("_loader_constraints"); | |
| 63 javaSystemLoaderField = type.getOopField("_java_system_loader"); | |
| 64 | |
| 1142 | 65 objectKlassField = type.getOopField(WK_KLASS("Object_klass")); |
| 66 classLoaderKlassField = type.getOopField(WK_KLASS("ClassLoader_klass")); | |
| 67 stringKlassField = type.getOopField(WK_KLASS("String_klass")); | |
| 68 systemKlassField = type.getOopField(WK_KLASS("System_klass")); | |
| 69 threadKlassField = type.getOopField(WK_KLASS("Thread_klass")); | |
| 70 threadGroupKlassField = type.getOopField(WK_KLASS("ThreadGroup_klass")); | |
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71 methodHandleKlassField = type.getOopField(WK_KLASS("MethodHandle_klass")); |
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72 } |
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73 |
| 147 | 74 // This WK functions must follow the definitions in systemDictionary.hpp: |
| 75 private static String WK_KLASS(String name) { | |
| 76 //#define WK_KLASS(name) _well_known_klasses[SystemDictionary::WK_KLASS_ENUM_NAME(name)] | |
| 77 return ("_well_known_klasses[SystemDictionary::"+WK_KLASS_ENUM_NAME(name)+"]"); | |
| 78 } | |
| 79 private static String WK_KLASS_ENUM_NAME(String kname) { | |
| 80 //#define WK_KLASS_ENUM_NAME(kname) kname##_knum | |
| 81 return (kname+"_knum"); | |
| 0 | 82 } |
| 83 | |
| 84 public Dictionary dictionary() { | |
| 85 Address tmp = dictionaryField.getValue(); | |
| 86 return (Dictionary) VMObjectFactory.newObject(Dictionary.class, tmp); | |
| 87 } | |
| 88 | |
| 89 public Dictionary sharedDictionary() { | |
| 90 Address tmp = sharedDictionaryField.getValue(); | |
| 91 return (Dictionary) VMObjectFactory.newObject(Dictionary.class, tmp); | |
| 92 } | |
| 93 | |
| 94 public PlaceholderTable placeholders() { | |
| 95 Address tmp = placeholdersField.getValue(); | |
| 96 return (PlaceholderTable) VMObjectFactory.newObject(PlaceholderTable.class, tmp); | |
| 97 } | |
| 98 | |
| 99 public LoaderConstraintTable constraints() { | |
| 100 Address tmp = placeholdersField.getValue(); | |
| 101 return (LoaderConstraintTable) VMObjectFactory.newObject(LoaderConstraintTable.class, tmp); | |
| 102 } | |
| 103 | |
| 104 // few well known classes -- not all are added here. | |
| 105 // add more if needed. | |
| 106 public static InstanceKlass getThreadKlass() { | |
| 107 return (InstanceKlass) newOop(threadKlassField.getValue()); | |
| 108 } | |
| 109 | |
| 110 public static InstanceKlass getThreadGroupKlass() { | |
| 111 return (InstanceKlass) newOop(threadGroupKlassField.getValue()); | |
| 112 } | |
| 113 | |
| 114 public static InstanceKlass getObjectKlass() { | |
| 115 return (InstanceKlass) newOop(objectKlassField.getValue()); | |
| 116 } | |
| 117 | |
| 118 public static InstanceKlass getStringKlass() { | |
| 119 return (InstanceKlass) newOop(stringKlassField.getValue()); | |
| 120 } | |
| 121 | |
| 122 public static InstanceKlass getClassLoaderKlass() { | |
| 123 return (InstanceKlass) newOop(classLoaderKlassField.getValue()); | |
| 124 } | |
| 125 | |
| 126 public static InstanceKlass getSystemKlass() { | |
| 127 return (InstanceKlass) newOop(systemKlassField.getValue()); | |
| 128 } | |
| 129 | |
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130 public static InstanceKlass getMethodHandleKlass() { |
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131 return (InstanceKlass) newOop(methodHandleKlassField.getValue()); |
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132 } |
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133 |
| 0 | 134 public InstanceKlass getAbstractOwnableSynchronizerKlass() { |
| 135 return (InstanceKlass) find("java/util/concurrent/locks/AbstractOwnableSynchronizer", | |
| 136 null, null); | |
| 137 } | |
| 138 | |
| 139 public static Oop javaSystemLoader() { | |
| 140 return newOop(javaSystemLoaderField.getValue()); | |
| 141 } | |
| 142 | |
| 143 private static Oop newOop(OopHandle handle) { | |
| 144 return VM.getVM().getObjectHeap().newOop(handle); | |
| 145 } | |
| 146 | |
| 147 /** Lookup an already loaded class. If not found null is returned. */ | |
| 148 public Klass find(String className, Oop classLoader, Oop protectionDomain) { | |
| 149 Symbol sym = VM.getVM().getSymbolTable().probe(className); | |
| 150 if (sym == null) return null; | |
| 151 return find(sym, classLoader, protectionDomain); | |
| 152 } | |
| 153 | |
| 154 /** Lookup an already loaded class. If not found null is returned. */ | |
| 155 public Klass find(Symbol className, Oop classLoader, Oop protectionDomain) { | |
| 156 Dictionary dict = dictionary(); | |
| 157 long hash = dict.computeHash(className, classLoader); | |
| 158 int index = dict.hashToIndex(hash); | |
| 159 return dict.find(index, hash, className, classLoader, protectionDomain); | |
| 160 } | |
| 161 | |
| 162 /** Interface for iterating through all classes in dictionary */ | |
| 163 public static interface ClassVisitor { | |
| 164 public void visit(Klass k); | |
| 165 } | |
| 166 | |
| 167 /** Interface for iterating through all classes and their class | |
| 168 loaders in dictionary */ | |
| 169 public static interface ClassAndLoaderVisitor { | |
| 170 public void visit(Klass k, Oop loader); | |
| 171 } | |
| 172 | |
| 173 /** Iterate over all klasses - including object, primitive | |
| 174 array klasses */ | |
| 175 public void allClassesDo(final ClassVisitor v) { | |
| 176 ClassVisitor visitor = new ClassVisitor() { | |
| 177 public void visit(Klass k) { | |
| 178 for (Klass l = k; l != null; l = l.arrayKlassOrNull()) { | |
| 179 v.visit(l); | |
| 180 } | |
| 181 } | |
| 182 }; | |
| 183 classesDo(visitor); | |
| 184 VM.getVM().getUniverse().basicTypeClassesDo(visitor); | |
| 185 } | |
| 186 | |
| 187 /** Iterate over all klasses in dictionary; just the classes from | |
| 188 declaring class loaders */ | |
| 189 public void classesDo(ClassVisitor v) { | |
| 190 dictionary().classesDo(v); | |
| 191 } | |
| 192 | |
| 193 /** All classes, and their class loaders */ | |
| 194 public void classesDo(ClassAndLoaderVisitor v) { | |
| 195 dictionary().classesDo(v); | |
| 196 } | |
| 197 | |
| 198 /** All array classes of primitive type, and their class loaders */ | |
| 199 public void primArrayClassesDo(ClassAndLoaderVisitor v) { | |
| 200 placeholders().primArrayClassesDo(v); | |
| 201 } | |
| 202 } |