Mercurial > hg > truffle
annotate agent/src/share/classes/sun/jvm/hotspot/memory/FreeChunk.java @ 13705:ac5b0f31f7a2
Truffle API-change: FrameDescriptors are now stored in the RootNode in a final field instead of the CallTarget.
author | Christian Humer <christian.humer@gmail.com> |
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date | Fri, 17 Jan 2014 17:06:08 +0100 |
parents | c18cbe5936b8 |
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rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 2003, 2009, Oracle and/or its affiliates. All rights reserved. |
0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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5 * This code is free software; you can redistribute it and/or modify it | |
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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). | |
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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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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.types.*; | |
30 import sun.jvm.hotspot.runtime.*; | |
187 | 31 import sun.jvm.hotspot.oops.*; |
0 | 32 |
33 public class FreeChunk extends VMObject { | |
34 static { | |
35 VM.registerVMInitializedObserver(new Observer() { | |
36 public void update(Observable o, Object data) { | |
37 initialize(VM.getVM().getTypeDataBase()); | |
38 } | |
39 }); | |
40 } | |
41 | |
42 private static synchronized void initialize(TypeDataBase db) { | |
43 Type type = db.lookupType("FreeChunk"); | |
44 nextField = type.getAddressField("_next"); | |
45 prevField = type.getAddressField("_prev"); | |
187 | 46 sizeField = type.getAddressField("_size"); |
0 | 47 } |
48 | |
49 // Fields | |
50 private static AddressField nextField; | |
51 private static AddressField prevField; | |
187 | 52 private static AddressField sizeField; |
0 | 53 |
54 // Accessors | |
55 public FreeChunk next() { | |
56 return (FreeChunk) VMObjectFactory.newObject(FreeChunk.class, nextField.getValue(addr)); | |
57 } | |
58 | |
59 public FreeChunk prev() { | |
60 Address prev = prevField.getValue(addr).andWithMask(~0x3); | |
61 return (FreeChunk) VMObjectFactory.newObject(FreeChunk.class, prev); | |
62 } | |
63 | |
64 public long size() { | |
187 | 65 if (VM.getVM().isCompressedOopsEnabled()) { |
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66 Mark mark = new Mark(addr.addOffsetTo(sizeField.getOffset())); |
187 | 67 return mark.getSize(); |
68 } else { | |
69 Address size = sizeField.getValue(addr); | |
70 Debugger dbg = VM.getVM().getDebugger(); | |
71 return dbg.getAddressValue(size); | |
72 } | |
0 | 73 } |
74 | |
75 public FreeChunk(Address addr) { | |
76 super(addr); | |
77 } | |
78 | |
187 | 79 public static boolean indicatesFreeChunk(Address cur) { |
80 FreeChunk f = new FreeChunk(cur); | |
81 return f.isFree(); | |
0 | 82 } |
83 | |
84 public boolean isFree() { | |
187 | 85 if (VM.getVM().isCompressedOopsEnabled()) { |
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86 Mark mark = new Mark(addr.addOffsetTo(sizeField.getOffset())); |
187 | 87 return mark.isCmsFreeChunk(); |
88 } else { | |
89 Address prev = prevField.getValue(addr); | |
90 Debugger dbg = VM.getVM().getDebugger(); | |
91 long word = dbg.getAddressValue(prev); | |
92 return (word & 0x1L) == 0x1L; | |
93 } | |
0 | 94 } |
95 } |