Mercurial > hg > graal-compiler
annotate agent/src/share/classes/sun/jvm/hotspot/memory/SymbolTable.java @ 1552:c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
Summary: Change all the Sun copyrights to Oracle copyright
Reviewed-by: ohair
| author | trims |
|---|---|
| date | Thu, 27 May 2010 19:08:38 -0700 |
| parents | a61af66fc99e |
| children | 3582bf76420e |
| rev | line source |
|---|---|
| 0 | 1 /* |
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6941466: Oracle rebranding changes for Hotspot repositories
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2 * Copyright (c) 2001, 2005, 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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6941466: Oracle rebranding changes for Hotspot repositories
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
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20 * or visit www.oracle.com if you need additional information or have any |
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6941466: Oracle rebranding changes for Hotspot repositories
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 25 package sun.jvm.hotspot.memory; | |
| 26 | |
| 27 import java.io.*; | |
| 28 import java.util.*; | |
| 29 import sun.jvm.hotspot.debugger.*; | |
| 30 import sun.jvm.hotspot.oops.*; | |
| 31 import sun.jvm.hotspot.types.*; | |
| 32 import sun.jvm.hotspot.runtime.*; | |
| 33 import sun.jvm.hotspot.utilities.*; | |
| 34 | |
| 35 public class SymbolTable extends sun.jvm.hotspot.utilities.Hashtable { | |
| 36 static { | |
| 37 VM.registerVMInitializedObserver(new Observer() { | |
| 38 public void update(Observable o, Object data) { | |
| 39 initialize(VM.getVM().getTypeDataBase()); | |
| 40 } | |
| 41 }); | |
| 42 } | |
| 43 | |
| 44 private static synchronized void initialize(TypeDataBase db) { | |
| 45 Type type = db.lookupType("SymbolTable"); | |
| 46 theTableField = type.getAddressField("_the_table"); | |
| 47 symbolTableSize = db.lookupIntConstant("SymbolTable::symbol_table_size").intValue(); | |
| 48 } | |
| 49 | |
| 50 // Fields | |
| 51 private static AddressField theTableField; | |
| 52 private static int symbolTableSize; | |
| 53 | |
| 54 // Accessors | |
| 55 public static SymbolTable getTheTable() { | |
| 56 Address tmp = theTableField.getValue(); | |
| 57 return (SymbolTable) VMObjectFactory.newObject(SymbolTable.class, tmp); | |
| 58 } | |
| 59 | |
| 60 public static int getSymbolTableSize() { | |
| 61 return symbolTableSize; | |
| 62 } | |
| 63 | |
| 64 public SymbolTable(Address addr) { | |
| 65 super(addr); | |
| 66 } | |
| 67 | |
| 68 /** Clone of VM's "temporary" probe routine, as the SA currently | |
| 69 does not support mutation so lookup() would have no effect | |
| 70 anyway. Returns null if the given string is not in the symbol | |
| 71 table. */ | |
| 72 public Symbol probe(String name) { | |
| 73 try { | |
| 74 return probe(toModifiedUTF8Bytes(name)); | |
| 75 } catch (IOException e) { | |
| 76 return null; | |
| 77 } | |
| 78 } | |
| 79 | |
| 80 /** Clone of VM's "temporary" probe routine, as the SA currently | |
| 81 does not support mutation so lookup() would have no effect | |
| 82 anyway. Returns null if the given string is not in the symbol | |
| 83 table. */ | |
| 84 public Symbol probe(byte[] name) { | |
| 85 long hashValue = hashSymbol(name); | |
| 86 for (HashtableEntry e = (HashtableEntry) bucket(hashToIndex(hashValue)); e != null; e = (HashtableEntry) e.next()) { | |
| 87 if (e.hash() == hashValue) { | |
| 88 Symbol sym = (Symbol) e.literal(); | |
| 89 if (sym.equals(name)) { | |
| 90 return sym; | |
| 91 } | |
| 92 } | |
| 93 } | |
| 94 return null; | |
| 95 } | |
| 96 | |
| 97 public interface SymbolVisitor { | |
| 98 public void visit(Symbol sym); | |
| 99 } | |
| 100 | |
| 101 public void symbolsDo(SymbolVisitor visitor) { | |
| 102 int numBuckets = tableSize(); | |
| 103 for (int i = 0; i < numBuckets; i++) { | |
| 104 for (HashtableEntry e = (HashtableEntry) bucket(i); e != null; | |
| 105 e = (HashtableEntry) e.next()) { | |
| 106 visitor.visit((Symbol) e.literal()); | |
| 107 } | |
| 108 } | |
| 109 } | |
| 110 | |
| 111 private static byte[] toModifiedUTF8Bytes(String name) throws IOException { | |
| 112 ByteArrayOutputStream baos = new ByteArrayOutputStream(); | |
| 113 DataOutputStream dos = new DataOutputStream(baos); | |
| 114 dos.writeUTF(name); | |
| 115 dos.flush(); | |
| 116 byte[] buf = baos.toByteArray(); | |
| 117 byte[] res = new byte[buf.length - 2]; | |
| 118 // skip the length part | |
| 119 System.arraycopy(buf, 2, res, 0, res.length); | |
| 120 return res; | |
| 121 } | |
| 122 } |