Mercurial > hg > graal-jvmci-8
annotate agent/src/share/classes/sun/jvm/hotspot/gc_implementation/g1/HeapRegionSeq.java @ 20336:6701abbc4441
8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
Summary: Let HeapRegionSeq manage the heap region and auxiliary data to decrease the amount of responsibilities of G1CollectedHeap, and encapsulate this work from other code.
Reviewed-by: jwilhelm, jmasa, mgerdin, brutisso
author | tschatzl |
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date | Tue, 19 Aug 2014 10:50:27 +0200 |
parents | 50287b659eb8 |
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rev | line source |
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3972 | 1 /* |
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2 * Copyright (c) 2011, 2013, Oracle and/or its affiliates. All rights reserved. |
3972 | 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | |
20 * or visit www.oracle.com if you need additional information or have any | |
21 * questions. | |
22 * | |
23 */ | |
24 | |
25 package sun.jvm.hotspot.gc_implementation.g1; | |
26 | |
27 import java.util.Iterator; | |
28 import java.util.Observable; | |
29 import java.util.Observer; | |
30 | |
31 import sun.jvm.hotspot.debugger.Address; | |
32 import sun.jvm.hotspot.runtime.VM; | |
33 import sun.jvm.hotspot.runtime.VMObject; | |
34 import sun.jvm.hotspot.runtime.VMObjectFactory; | |
35 import sun.jvm.hotspot.types.AddressField; | |
36 import sun.jvm.hotspot.types.CIntegerField; | |
37 import sun.jvm.hotspot.types.Type; | |
38 import sun.jvm.hotspot.types.TypeDataBase; | |
39 | |
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40 // Mirror class for HeapRegionSeq. It essentially encapsulates the G1HeapRegionTable. |
3972 | 41 |
42 public class HeapRegionSeq extends VMObject { | |
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43 // G1HeapRegionTable _regions |
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44 static private long regionsFieldOffset; |
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45 // uint _committed_length |
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46 static private CIntegerField numCommittedField; |
3972 | 47 |
48 static { | |
49 VM.registerVMInitializedObserver(new Observer() { | |
50 public void update(Observable o, Object data) { | |
51 initialize(VM.getVM().getTypeDataBase()); | |
52 } | |
53 }); | |
54 } | |
55 | |
56 static private synchronized void initialize(TypeDataBase db) { | |
57 Type type = db.lookupType("HeapRegionSeq"); | |
58 | |
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tschatzl
parents:
6010
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59 regionsFieldOffset = type.getField("_regions").getOffset(); |
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60 numCommittedField = type.getCIntegerField("_num_committed"); |
3972 | 61 } |
62 | |
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63 private G1HeapRegionTable regions() { |
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64 Address regionsAddr = addr.addOffsetTo(regionsFieldOffset); |
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65 return (G1HeapRegionTable) VMObjectFactory.newObject(G1HeapRegionTable.class, |
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tschatzl
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66 regionsAddr); |
3972 | 67 } |
68 | |
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69 public long capacity() { |
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70 return length() * HeapRegion.grainBytes(); |
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71 } |
6701abbc4441
8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
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72 |
3972 | 73 public long length() { |
12904
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tschatzl
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74 return regions().length(); |
3972 | 75 } |
76 | |
13419
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8029329: tmtools tests fail with NPE (in the tool) when run with G1 and FlightRecorder
sjohanss
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77 public long committedLength() { |
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8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
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78 return numCommittedField.getValue(addr); |
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50287b659eb8
8029329: tmtools tests fail with NPE (in the tool) when run with G1 and FlightRecorder
sjohanss
parents:
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79 } |
50287b659eb8
8029329: tmtools tests fail with NPE (in the tool) when run with G1 and FlightRecorder
sjohanss
parents:
12904
diff
changeset
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80 |
3972 | 81 public Iterator<HeapRegion> heapRegionIterator() { |
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8054818: Refactor HeapRegionSeq to manage heap region and auxiliary data
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82 return regions().heapRegionIterator(length()); |
3972 | 83 } |
84 | |
85 public HeapRegionSeq(Address addr) { | |
86 super(addr); | |
87 } | |
88 } |