1 /*
2 * Copyright (c) 2000, 2016, 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 *
34 // ConstantPoolCache : A constant pool cache (ConstantPoolCache).
35 // See cpCache.hpp for details about this class.
36 //
37 public class ConstantPoolCache extends Metadata {
38 static {
39 VM.registerVMInitializedObserver(new Observer() {
40 public void update(Observable o, Object data) {
41 initialize(VM.getVM().getTypeDataBase());
42 }
43 });
44 }
45
46 private static synchronized void initialize(TypeDataBase db) throws WrongTypeException {
47 Type type = db.lookupType("ConstantPoolCache");
48 constants = new MetadataField(type.getAddressField("_constant_pool"), 0);
49 baseOffset = type.getSize();
50 Type elType = db.lookupType("ConstantPoolCacheEntry");
51 elementSize = elType.getSize();
52 length = new CIntField(type.getCIntegerField("_length"), 0);
53 intSize = VM.getVM().getObjectHeap().getIntSize();
54 }
55
56 public ConstantPoolCache(Address addr) {
57 super(addr);
58 }
59
60 public boolean isConstantPoolCache() { return true; }
61
62 private static MetadataField constants;
63
64 private static long baseOffset;
65 private static long elementSize;
66 private static CIntField length;
67 private static long intSize;
68
69
70 public ConstantPool getConstants() { return (ConstantPool) constants.getValue(this); }
71
72 public long getSize() {
73 return alignSize(baseOffset + getLength() * elementSize);
74 }
75
76 public ConstantPoolCacheEntry getEntryAt(int i) {
77 if (i < 0 || i >= getLength()) throw new IndexOutOfBoundsException(i + " " + getLength());
78 return new ConstantPoolCacheEntry(this, i);
79 }
80
81 public int getIntAt(int entry, int fld) {
82 long offset = baseOffset + entry * elementSize + fld * intSize;
83 return (int) getAddress().getCIntegerAt(offset, intSize, true );
84 }
85
86
87 public void printValueOn(PrintStream tty) {
88 tty.print("ConstantPoolCache for " + getConstants().getPoolHolder().getName().asString() + " address = " + getAddress() + " offset = " + baseOffset);
89 }
90
91 public int getLength() {
92 return (int) length.getValue(getAddress());
93 }
94
95 public void iterateFields(MetadataVisitor visitor) {
96 super.iterateFields(visitor);
97 visitor.doMetadata(constants, true);
98 for (int i = 0; i < getLength(); i++) {
99 ConstantPoolCacheEntry entry = getEntryAt(i);
100 entry.iterateFields(visitor);
101 }
102 }
103 };
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1 /*
2 * Copyright (c) 2000, 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 *
34 // ConstantPoolCache : A constant pool cache (ConstantPoolCache).
35 // See cpCache.hpp for details about this class.
36 //
37 public class ConstantPoolCache extends Metadata {
38 static {
39 VM.registerVMInitializedObserver(new Observer() {
40 public void update(Observable o, Object data) {
41 initialize(VM.getVM().getTypeDataBase());
42 }
43 });
44 }
45
46 private static synchronized void initialize(TypeDataBase db) throws WrongTypeException {
47 Type type = db.lookupType("ConstantPoolCache");
48 constants = new MetadataField(type.getAddressField("_constant_pool"), 0);
49 baseOffset = type.getSize();
50 Type elType = db.lookupType("ConstantPoolCacheEntry");
51 elementSize = elType.getSize();
52 length = new CIntField(type.getCIntegerField("_length"), 0);
53 intSize = VM.getVM().getObjectHeap().getIntSize();
54 resolvedReferences = type.getAddressField("_resolved_references");
55 referenceMap = type.getAddressField("_reference_map");
56 }
57
58 public ConstantPoolCache(Address addr) {
59 super(addr);
60 }
61
62 public boolean isConstantPoolCache() { return true; }
63
64 private static MetadataField constants;
65
66 private static long baseOffset;
67 private static long elementSize;
68 private static CIntField length;
69 private static long intSize;
70 private static AddressField resolvedReferences;
71 private static AddressField referenceMap;
72
73 public ConstantPool getConstants() { return (ConstantPool) constants.getValue(this); }
74
75 public long getSize() {
76 return alignSize(baseOffset + getLength() * elementSize);
77 }
78
79 public ConstantPoolCacheEntry getEntryAt(int i) {
80 if (i < 0 || i >= getLength()) throw new IndexOutOfBoundsException(i + " " + getLength());
81 return new ConstantPoolCacheEntry(this, i);
82 }
83
84 public int getIntAt(int entry, int fld) {
85 long offset = baseOffset + entry * elementSize + fld * intSize;
86 return (int) getAddress().getCIntegerAt(offset, intSize, true );
87 }
88
89
90 public void printValueOn(PrintStream tty) {
91 tty.print("ConstantPoolCache for " + getConstants().getPoolHolder().getName().asString() + " address = " + getAddress() + " offset = " + baseOffset);
92 }
93
94 public int getLength() {
95 return (int) length.getValue(getAddress());
96 }
97
98 public void iterateFields(MetadataVisitor visitor) {
99 super.iterateFields(visitor);
100 visitor.doMetadata(constants, true);
101 for (int i = 0; i < getLength(); i++) {
102 ConstantPoolCacheEntry entry = getEntryAt(i);
103 entry.iterateFields(visitor);
104 }
105 }
106
107 public Oop getResolvedReferences() {
108 Address handle = resolvedReferences.getValue(getAddress());
109 if (handle != null) {
110 // Load through the handle
111 OopHandle refs = handle.getOopHandleAt(0);
112 return VM.getVM().getObjectHeap().newOop(refs);
113 }
114 return null;
115 }
116
117 public U2Array referenceMap() {
118 return new U2Array(referenceMap.getValue(getAddress()));
119 }
120 };
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