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comparison agent/src/share/classes/sun/jvm/hotspot/gc_implementation/g1/G1CollectedHeap.java @ 3972:4f93f0d00802

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7059019: G1: add G1 support to the SA Summary: Extend the SA to recognize the G1CollectedHeap and implement any code that's needed by our serviceability tools (jmap, jinfo, jstack, etc.) that depend on the SA. Reviewed-by: never, poonam, johnc
author tonyp
date Tue, 20 Sep 2011 09:59:59 -0400
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children 81aa07130d30
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3953:77e1a9153757 3972:4f93f0d00802
1 /*
2 * Copyright (c) 2011, Oracle and/or its affiliates. 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 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.gc_interface.CollectedHeapName;
33 import sun.jvm.hotspot.memory.MemRegion;
34 import sun.jvm.hotspot.memory.SharedHeap;
35 import sun.jvm.hotspot.memory.SpaceClosure;
36 import sun.jvm.hotspot.runtime.VM;
37 import sun.jvm.hotspot.runtime.VMObjectFactory;
38 import sun.jvm.hotspot.types.CIntegerField;
39 import sun.jvm.hotspot.types.Type;
40 import sun.jvm.hotspot.types.TypeDataBase;
41
42 // Mirror class for G1CollectedHeap.
43
44 public class G1CollectedHeap extends SharedHeap {
45 // HeapRegionSeq _seq;
46 static private long hrsFieldOffset;
47 // MemRegion _g1_committed;
48 static private long g1CommittedFieldOffset;
49 // size_t _summary_bytes_used;
50 static private CIntegerField summaryBytesUsedField;
51
52 static {
53 VM.registerVMInitializedObserver(new Observer() {
54 public void update(Observable o, Object data) {
55 initialize(VM.getVM().getTypeDataBase());
56 }
57 });
58 }
59
60 static private synchronized void initialize(TypeDataBase db) {
61 Type type = db.lookupType("G1CollectedHeap");
62
63 hrsFieldOffset = type.getField("_hrs").getOffset();
64 g1CommittedFieldOffset = type.getField("_g1_committed").getOffset();
65 summaryBytesUsedField = type.getCIntegerField("_summary_bytes_used");
66 }
67
68 public long capacity() {
69 Address g1CommittedAddr = addr.addOffsetTo(g1CommittedFieldOffset);
70 MemRegion g1_committed = new MemRegion(g1CommittedAddr);
71 return g1_committed.byteSize();
72 }
73
74 public long used() {
75 return summaryBytesUsedField.getValue(addr);
76 }
77
78 public long n_regions() {
79 return hrs().length();
80 }
81
82 private HeapRegionSeq hrs() {
83 Address hrsAddr = addr.addOffsetTo(hrsFieldOffset);
84 return (HeapRegionSeq) VMObjectFactory.newObject(HeapRegionSeq.class,
85 hrsAddr);
86 }
87
88 private Iterator<HeapRegion> heapRegionIterator() {
89 return hrs().heapRegionIterator();
90 }
91
92 public void heapRegionIterate(SpaceClosure scl) {
93 Iterator<HeapRegion> iter = heapRegionIterator();
94 while (iter.hasNext()) {
95 HeapRegion hr = iter.next();
96 scl.doSpace(hr);
97 }
98 }
99
100 public CollectedHeapName kind() {
101 return CollectedHeapName.G1_COLLECTED_HEAP;
102 }
103
104 public G1CollectedHeap(Address addr) {
105 super(addr);
106 }
107 }