1 /*
2 * Copyright (c) 2013, 2015, 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.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
40 // Mirror class for G1HeapRegionTable. It's essentially an index -> HeapRegion map.
41
42 public class G1HeapRegionTable extends VMObject {
43 // HeapRegion** _base;
44 static private AddressField baseField;
45 // uint _length;
46 static private CIntegerField lengthField;
47 // HeapRegion** _biased_base
48 static private AddressField biasedBaseField;
49 // size_t _bias
50 static private CIntegerField biasField;
51 // uint _shift_by
52 static private CIntegerField shiftByField;
53
54 static {
55 VM.registerVMInitializedObserver(new Observer() {
56 public void update(Observable o, Object data) {
57 initialize(VM.getVM().getTypeDataBase());
58 }
114
115 @Override
116 public HeapRegion next() { return positionToNext(); }
117
118 @Override
119 public void remove() { /* not supported */ }
120
121 HeapRegionIterator(long totalLength) {
122 index = 0;
123 length = totalLength;
124 positionToNext();
125 }
126 }
127
128 public Iterator<HeapRegion> heapRegionIterator(long committedLength) {
129 return new HeapRegionIterator(committedLength);
130 }
131
132 public G1HeapRegionTable(Address addr) {
133 super(addr);
134 }
135 }
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1 /*
2 * Copyright (c) 2013, 2017, 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.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.debugger.OopHandle;
33 import sun.jvm.hotspot.runtime.VM;
34 import sun.jvm.hotspot.runtime.VMObject;
35 import sun.jvm.hotspot.runtime.VMObjectFactory;
36 import sun.jvm.hotspot.types.AddressField;
37 import sun.jvm.hotspot.types.CIntegerField;
38 import sun.jvm.hotspot.types.Type;
39 import sun.jvm.hotspot.types.TypeDataBase;
40 import sun.jvm.hotspot.utilities.Assert;
41
42 // Mirror class for G1HeapRegionTable. It's essentially an index -> HeapRegion map.
43
44 public class G1HeapRegionTable extends VMObject {
45 // HeapRegion** _base;
46 static private AddressField baseField;
47 // uint _length;
48 static private CIntegerField lengthField;
49 // HeapRegion** _biased_base
50 static private AddressField biasedBaseField;
51 // size_t _bias
52 static private CIntegerField biasField;
53 // uint _shift_by
54 static private CIntegerField shiftByField;
55
56 static {
57 VM.registerVMInitializedObserver(new Observer() {
58 public void update(Observable o, Object data) {
59 initialize(VM.getVM().getTypeDataBase());
60 }
116
117 @Override
118 public HeapRegion next() { return positionToNext(); }
119
120 @Override
121 public void remove() { /* not supported */ }
122
123 HeapRegionIterator(long totalLength) {
124 index = 0;
125 length = totalLength;
126 positionToNext();
127 }
128 }
129
130 public Iterator<HeapRegion> heapRegionIterator(long committedLength) {
131 return new HeapRegionIterator(committedLength);
132 }
133
134 public G1HeapRegionTable(Address addr) {
135 super(addr);
136 }
137
138 public HeapRegion getByAddress(Address addr) {
139 if (Assert.ASSERTS_ENABLED) {
140 Assert.that(addr instanceof OopHandle, "addr should be OopHandle");
141 }
142
143 long biasedIndex = addr.asLongValue() >>> shiftBy();
144 return new HeapRegion(addr.addOffsetToAsOopHandle(
145 biasedIndex * HeapRegion.getPointerSize()));
146 }
147 }
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