Mercurial > hg > graal-compiler
annotate agent/src/share/classes/sun/jvm/hotspot/oops/Array.java @ 17524:89152779163c
Merge with jdk8-b132
author | Gilles Duboscq <duboscq@ssw.jku.at> |
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date | Wed, 15 Oct 2014 11:59:32 +0200 |
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2 * Copyright (c) 2000, 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 * | |
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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.oops; | |
26 | |
27 import java.util.*; | |
28 import sun.jvm.hotspot.debugger.*; | |
29 import sun.jvm.hotspot.memory.*; | |
30 import sun.jvm.hotspot.runtime.*; | |
31 import sun.jvm.hotspot.types.*; | |
32 | |
33 // Array is an abstract superclass for TypeArray and ObjArray | |
34 | |
35 public class Array extends Oop { | |
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 Array(OopHandle handle, ObjectHeap heap) { | |
45 super(handle, heap); | |
46 } | |
47 | |
48 private static void initialize(TypeDataBase db) throws WrongTypeException { | |
49 Type type = db.lookupType("arrayOopDesc"); | |
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50 typeSize = (int)type.getSize(); |
0 | 51 } |
52 | |
53 // Size of the arrayOopDesc | |
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54 private static long headerSize=0; |
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55 private static long lengthOffsetInBytes=0; |
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56 private static long typeSize; |
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57 |
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58 private static long headerSizeInBytes() { |
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59 if (headerSize != 0) { |
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60 return headerSize; |
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61 } |
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62 if (VM.getVM().isCompressedKlassPointersEnabled()) { |
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63 headerSize = typeSize; |
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64 } else { |
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65 headerSize = VM.getVM().alignUp(typeSize + VM.getVM().getIntSize(), |
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66 VM.getVM().getHeapWordSize()); |
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67 } |
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68 return headerSize; |
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69 } |
0 | 70 |
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71 private static long headerSize(BasicType type) { |
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72 if (Universe.elementTypeShouldBeAligned(type)) { |
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73 return alignObjectSize(headerSizeInBytes())/VM.getVM().getHeapWordSize(); |
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74 } else { |
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75 return headerSizeInBytes()/VM.getVM().getHeapWordSize(); |
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76 } |
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77 } |
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78 |
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79 private long lengthOffsetInBytes() { |
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80 if (lengthOffsetInBytes != 0) { |
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81 return lengthOffsetInBytes; |
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82 } |
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83 if (VM.getVM().isCompressedKlassPointersEnabled()) { |
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84 lengthOffsetInBytes = typeSize - VM.getVM().getIntSize(); |
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85 } else { |
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86 lengthOffsetInBytes = typeSize; |
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87 } |
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88 return lengthOffsetInBytes; |
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89 } |
0 | 90 |
91 // Accessors for declared fields | |
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92 public long getLength() { |
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93 boolean isUnsigned = true; |
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94 return this.getHandle().getCIntegerAt(lengthOffsetInBytes(), VM.getVM().getIntSize(), isUnsigned); |
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95 } |
0 | 96 |
97 public long getObjectSize() { | |
98 ArrayKlass klass = (ArrayKlass) getKlass(); | |
99 // We have to fetch the length of the array, shift (multiply) it | |
100 // appropriately, up to wordSize, add the header, and align to | |
101 // object size. | |
102 long s = getLength() << klass.getLog2ElementSize(); | |
103 s += klass.getArrayHeaderInBytes(); | |
104 s = Oop.alignObjectSize(s); | |
105 return s; | |
106 } | |
107 | |
108 public static long baseOffsetInBytes(BasicType type) { | |
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109 return headerSize(type) * VM.getVM().getHeapWordSize(); |
0 | 110 } |
111 | |
112 public boolean isArray() { return true; } | |
113 | |
114 public void iterateFields(OopVisitor visitor, boolean doVMFields) { | |
115 super.iterateFields(visitor, doVMFields); | |
116 } | |
117 } |