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comparison agent/src/share/classes/sun/jvm/hotspot/memory/SystemDictionary.java @ 4864:b2cd0ee8f778

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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
comparison
equal deleted inserted replaced
4863:d96c130c9399 4864:b2cd0ee8f778
1 /* 1 /*
2 * Copyright (c) 2001, 2010, Oracle and/or its affiliates. All rights reserved. 2 * Copyright (c) 2001, 2012, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 * 4 *
5 * This code is free software; you can redistribute it and/or modify it 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 6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. 7 * published by the Free Software Foundation.
34 private static AddressField dictionaryField; 34 private static AddressField dictionaryField;
35 private static AddressField sharedDictionaryField; 35 private static AddressField sharedDictionaryField;
36 private static AddressField placeholdersField; 36 private static AddressField placeholdersField;
37 private static AddressField loaderConstraintTableField; 37 private static AddressField loaderConstraintTableField;
38 private static sun.jvm.hotspot.types.OopField javaSystemLoaderField; 38 private static sun.jvm.hotspot.types.OopField javaSystemLoaderField;
39 private static int nofBuckets;
40 39
41 private static sun.jvm.hotspot.types.OopField objectKlassField; 40 private static sun.jvm.hotspot.types.OopField objectKlassField;
42 private static sun.jvm.hotspot.types.OopField classLoaderKlassField; 41 private static sun.jvm.hotspot.types.OopField classLoaderKlassField;
43 private static sun.jvm.hotspot.types.OopField stringKlassField; 42 private static sun.jvm.hotspot.types.OopField stringKlassField;
44 private static sun.jvm.hotspot.types.OopField systemKlassField; 43 private static sun.jvm.hotspot.types.OopField systemKlassField;
60 dictionaryField = type.getAddressField("_dictionary"); 59 dictionaryField = type.getAddressField("_dictionary");
61 sharedDictionaryField = type.getAddressField("_shared_dictionary"); 60 sharedDictionaryField = type.getAddressField("_shared_dictionary");
62 placeholdersField = type.getAddressField("_placeholders"); 61 placeholdersField = type.getAddressField("_placeholders");
63 loaderConstraintTableField = type.getAddressField("_loader_constraints"); 62 loaderConstraintTableField = type.getAddressField("_loader_constraints");
64 javaSystemLoaderField = type.getOopField("_java_system_loader"); 63 javaSystemLoaderField = type.getOopField("_java_system_loader");
65 nofBuckets = db.lookupIntConstant("SystemDictionary::_nof_buckets").intValue();
66 64
67 objectKlassField = type.getOopField(WK_KLASS("Object_klass")); 65 objectKlassField = type.getOopField(WK_KLASS("Object_klass"));
68 classLoaderKlassField = type.getOopField(WK_KLASS("ClassLoader_klass")); 66 classLoaderKlassField = type.getOopField(WK_KLASS("ClassLoader_klass"));
69 stringKlassField = type.getOopField(WK_KLASS("String_klass")); 67 stringKlassField = type.getOopField(WK_KLASS("String_klass"));
70 systemKlassField = type.getOopField(WK_KLASS("System_klass")); 68 systemKlassField = type.getOopField(WK_KLASS("System_klass"));
138 null, null); 136 null, null);
139 } 137 }
140 138
141 public static Oop javaSystemLoader() { 139 public static Oop javaSystemLoader() {
142 return newOop(javaSystemLoaderField.getValue()); 140 return newOop(javaSystemLoaderField.getValue());
143 }
144
145 public static int getNumOfBuckets() {
146 return nofBuckets;
147 } 141 }
148 142
149 private static Oop newOop(OopHandle handle) { 143 private static Oop newOop(OopHandle handle) {
150 return VM.getVM().getObjectHeap().newOop(handle); 144 return VM.getVM().getObjectHeap().newOop(handle);
151 } 145 }