Mercurial > hg > truffle
annotate agent/src/share/classes/sun/jvm/hotspot/utilities/Hashtable.java @ 3945:8ed53447f690
Merge
author | iveresov |
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date | Thu, 15 Sep 2011 12:44:09 -0700 |
parents | 1d1603768966 |
children | d2a62e0f25eb |
rev | line source |
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0 | 1 /* |
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7010070: Update all 2010 Oracle-changed OpenJDK files to have the proper copyright dates - second pass
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2 * Copyright (c) 2003, 2011, 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.utilities; | |
26 | |
27 import java.util.*; | |
28 import sun.jvm.hotspot.debugger.*; | |
29 import sun.jvm.hotspot.types.*; | |
30 import sun.jvm.hotspot.runtime.*; | |
31 | |
32 public class Hashtable extends BasicHashtable { | |
33 static { | |
34 VM.registerVMInitializedObserver(new Observer() { | |
35 public void update(Observable o, Object data) { | |
36 initialize(VM.getVM().getTypeDataBase()); | |
37 } | |
38 }); | |
39 } | |
40 | |
41 private static synchronized void initialize(TypeDataBase db) { | |
42 // just to confirm that type exists | |
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43 Type type = db.lookupType("Hashtable<intptr_t>"); |
0 | 44 } |
45 | |
46 // derived class may return Class<? extends HashtableEntry> | |
47 protected Class getHashtableEntryClass() { | |
48 return HashtableEntry.class; | |
49 } | |
50 | |
51 public int hashToIndex(long fullHash) { | |
52 return (int) (fullHash % tableSize()); | |
53 } | |
54 | |
55 public Hashtable(Address addr) { | |
56 super(addr); | |
57 } | |
58 | |
59 // VM's Hashtable::hash_symbol | |
60 protected static long hashSymbol(byte[] buf) { | |
61 long h = 0; | |
62 int s = 0; | |
63 int len = buf.length; | |
64 while (len-- > 0) { | |
65 h = 31*h + (0xFFL & buf[s]); | |
66 s++; | |
67 } | |
68 return h & 0xFFFFFFFFL; | |
69 } | |
70 } |