Mercurial > hg > truffle
annotate agent/src/share/classes/sun/jvm/hotspot/memory/Dictionary.java @ 6725:da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
Summary: Remove PermGen, allocate meta-data in metaspace linked to class loaders, rewrite GC walking, rewrite and rename metadata to be C++ classes
Reviewed-by: jmasa, stefank, never, coleenp, kvn, brutisso, mgerdin, dholmes, jrose, twisti, roland
Contributed-by: jmasa <jon.masamitsu@oracle.com>, stefank <stefan.karlsson@oracle.com>, mgerdin <mikael.gerdin@oracle.com>, never <tom.rodriguez@oracle.com>
| author | coleenp |
|---|---|
| date | Sat, 01 Sep 2012 13:25:18 -0400 |
| parents | c18cbe5936b8 |
| children |
| rev | line source |
|---|---|
| 0 | 1 /* |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
1552
diff
changeset
|
2 * Copyright (c) 2003, 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 * | |
|
1552
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
0
diff
changeset
|
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
|
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
0
diff
changeset
|
20 * or visit www.oracle.com if you need additional information or have any |
|
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
0
diff
changeset
|
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.types.*; | |
| 31 import sun.jvm.hotspot.runtime.*; | |
| 32 import sun.jvm.hotspot.utilities.*; | |
| 33 | |
| 34 public class Dictionary extends TwoOopHashtable { | |
| 35 static { | |
| 36 VM.registerVMInitializedObserver(new Observer() { | |
| 37 public void update(Observable o, Object data) { | |
| 38 initialize(VM.getVM().getTypeDataBase()); | |
| 39 } | |
| 40 }); | |
| 41 } | |
| 42 | |
| 43 private static synchronized void initialize(TypeDataBase db) { | |
| 44 // just checking that the type exists | |
| 45 Type type = db.lookupType("Dictionary"); | |
| 46 } | |
| 47 | |
| 48 public Dictionary(Address addr) { | |
| 49 super(addr); | |
| 50 } | |
| 51 | |
| 52 // this is overriden here so that Hashtable.bucket will return | |
| 53 // object of DictionaryEntry.class | |
| 54 protected Class getHashtableEntryClass() { | |
| 55 return DictionaryEntry.class; | |
| 56 } | |
| 57 | |
| 58 /** Iterate over all klasses in dictionary; just the classes from | |
| 59 declaring class loaders */ | |
| 60 public void classesDo(SystemDictionary.ClassVisitor v) { | |
| 61 ObjectHeap heap = VM.getVM().getObjectHeap(); | |
| 62 int tblSize = tableSize(); | |
| 63 for (int index = 0; index < tblSize; index++) { | |
| 64 for (DictionaryEntry probe = (DictionaryEntry) bucket(index); probe != null; | |
| 65 probe = (DictionaryEntry) probe.next()) { | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
1552
diff
changeset
|
66 Klass k = probe.klass(); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
1552
diff
changeset
|
67 if (heap.equal(probe.loader(), ((InstanceKlass) k).getClassLoader())) { |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
1552
diff
changeset
|
68 v.visit(k); |
| 0 | 69 } |
| 70 } | |
| 71 } | |
| 72 } | |
| 73 | |
| 74 /** All classes, and their class loaders */ | |
| 75 public void classesDo(SystemDictionary.ClassAndLoaderVisitor v) { | |
| 76 int tblSize = tableSize(); | |
| 77 for (int index = 0; index < tblSize; index++) { | |
| 78 for (DictionaryEntry probe = (DictionaryEntry) bucket(index); probe != null; | |
| 79 probe = (DictionaryEntry) probe.next()) { | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
1552
diff
changeset
|
80 Klass k = probe.klass(); |
|
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
1552
diff
changeset
|
81 v.visit(k, probe.loader()); |
| 0 | 82 } |
| 83 } | |
| 84 } | |
| 85 | |
| 86 public Klass find(int index, long hash, Symbol className, Oop classLoader, Oop protectionDomain) { | |
| 87 DictionaryEntry entry = getEntry(index, hash, className, classLoader); | |
| 88 if (entry != null && entry.isValidProtectionDomain(protectionDomain)) { | |
| 89 return entry.klass(); | |
| 90 } | |
| 91 return null; | |
| 92 } | |
| 93 | |
| 94 // - Internals only below this point | |
| 95 | |
| 96 private DictionaryEntry getEntry(int index, long hash, Symbol className, Oop classLoader) { | |
| 97 for (DictionaryEntry entry = (DictionaryEntry) bucket(index); entry != null; | |
| 98 entry = (DictionaryEntry) entry.next()) { | |
| 99 if (entry.hash() == hash && entry.equals(className, classLoader)) { | |
| 100 return entry; | |
| 101 } | |
| 102 } | |
| 103 return null; | |
| 104 } | |
| 105 } |