Mercurial > hg > graal-compiler
annotate agent/src/share/classes/sun/jvm/hotspot/oops/ObjArray.java @ 132:60b728ec77c1
6652736: well known classes in system dictionary are inefficiently processed
Summary: combine many scalar variables into a single enum-indexed array in SystemDictionary.
Reviewed-by: kvn
author | jrose |
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date | Tue, 29 Apr 2008 19:45:22 -0700 |
parents | ba764ed4b6f2 |
children | d1605aabd0a1 |
rev | line source |
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0 | 1 /* |
2 * Copyright 2000-2004 Sun Microsystems, Inc. All Rights Reserved. | |
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 * | |
19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
21 * have any questions. | |
22 * | |
23 */ | |
24 | |
25 package sun.jvm.hotspot.oops; | |
26 | |
27 import java.io.*; | |
28 import java.util.*; | |
29 import sun.jvm.hotspot.debugger.*; | |
30 import sun.jvm.hotspot.runtime.*; | |
31 import sun.jvm.hotspot.types.*; | |
32 | |
33 // An ObjArray is an array containing oops | |
34 | |
35 public class ObjArray extends Array { | |
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) throws WrongTypeException { | |
45 Type type = db.lookupType("objArrayOopDesc"); | |
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46 elementSize = VM.getVM().getHeapOopSize(); |
0 | 47 } |
48 | |
49 ObjArray(OopHandle handle, ObjectHeap heap) { | |
50 super(handle, heap); | |
51 } | |
52 | |
53 public boolean isObjArray() { return true; } | |
54 | |
55 private static long elementSize; | |
56 | |
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57 public OopHandle getOopHandleAt(long index) { |
0 | 58 long offset = baseOffsetInBytes(BasicType.T_OBJECT) + (index * elementSize); |
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59 if (VM.getVM().isCompressedOopsEnabled()) { |
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60 return getHandle().getCompOopHandleAt(offset); |
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61 } else { |
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62 return getHandle().getOopHandleAt(offset); |
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63 } |
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64 } |
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65 |
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66 public Oop getObjAt(long index) { |
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67 return getHeap().newOop(getOopHandleAt(index)); |
0 | 68 } |
69 | |
70 public void printValueOn(PrintStream tty) { | |
71 tty.print("ObjArray"); | |
72 } | |
73 | |
74 public void iterateFields(OopVisitor visitor, boolean doVMFields) { | |
75 super.iterateFields(visitor, doVMFields); | |
76 int length = (int) getLength(); | |
77 long baseOffset = baseOffsetInBytes(BasicType.T_OBJECT); | |
78 for (int index = 0; index < length; index++) { | |
79 long offset = baseOffset + (index * elementSize); | |
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80 OopField field; |
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81 if (VM.getVM().isCompressedOopsEnabled()) { |
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82 field = new NarrowOopField(new IndexableFieldIdentifier(index), offset, false); |
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83 } else { |
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84 field = new OopField(new IndexableFieldIdentifier(index), offset, false); |
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85 } |
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86 visitor.doOop(field, false); |
0 | 87 } |
88 } | |
89 } |