Mon, 28 Feb 2011 11:48:53 +0000
7015430: Incorrect thrown type determined for unchecked invocations
Summary: Thrown types do not get updated after 15.12.2.8, and do not get erased as per 15.12.2.6
Reviewed-by: jjg, dlsmith
1 /*
2 * Copyright (c) 2007, 2009, 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. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
26 package com.sun.tools.classfile;
28 import java.io.IOException;
29 import java.util.Iterator;
30 import java.util.NoSuchElementException;
32 /**
33 * See JVMS3, section 4.8.3.
34 *
35 * <p><b>This is NOT part of any supported API.
36 * If you write code that depends on this, you do so at your own risk.
37 * This code and its internal interfaces are subject to change or
38 * deletion without notice.</b>
39 */
40 public class Code_attribute extends Attribute {
41 public class InvalidIndex extends AttributeException {
42 private static final long serialVersionUID = -8904527774589382802L;
43 InvalidIndex(int index) {
44 this.index = index;
45 }
47 @Override
48 public String getMessage() {
49 // i18n
50 return "invalid index " + index + " in Code attribute";
51 }
53 public final int index;
54 }
56 Code_attribute(ClassReader cr, int name_index, int length)
57 throws IOException, ConstantPoolException {
58 super(name_index, length);
59 max_stack = cr.readUnsignedShort();
60 max_locals = cr.readUnsignedShort();
61 code_length = cr.readInt();
62 code = new byte[code_length];
63 cr.readFully(code);
64 exception_table_langth = cr.readUnsignedShort();
65 exception_table = new Exception_data[exception_table_langth];
66 for (int i = 0; i < exception_table_langth; i++)
67 exception_table[i] = new Exception_data(cr);
68 attributes = new Attributes(cr);
69 }
71 public int getByte(int offset) throws InvalidIndex {
72 if (offset < 0 || offset >= code.length)
73 throw new InvalidIndex(offset);
74 return code[offset];
75 }
77 public int getUnsignedByte(int offset) throws InvalidIndex {
78 if (offset < 0 || offset >= code.length)
79 throw new InvalidIndex(offset);
80 return code[offset] & 0xff;
81 }
83 public int getShort(int offset) throws InvalidIndex {
84 if (offset < 0 || offset + 1 >= code.length)
85 throw new InvalidIndex(offset);
86 return (code[offset] << 8) | (code[offset + 1] & 0xFF);
87 }
89 public int getUnsignedShort(int offset) throws InvalidIndex {
90 if (offset < 0 || offset + 1 >= code.length)
91 throw new InvalidIndex(offset);
92 return ((code[offset] << 8) | (code[offset + 1] & 0xFF)) & 0xFFFF;
93 }
95 public int getInt(int offset) throws InvalidIndex {
96 if (offset < 0 || offset + 3 >= code.length)
97 throw new InvalidIndex(offset);
98 return (getShort(offset) << 16) | (getShort(offset + 2) & 0xFFFF);
99 }
101 public <R, D> R accept(Visitor<R, D> visitor, D data) {
102 return visitor.visitCode(this, data);
103 }
105 public Iterable<Instruction> getInstructions() {
106 return new Iterable<Instruction>() {
107 public Iterator<Instruction> iterator() {
108 return new Iterator<Instruction>() {
110 public boolean hasNext() {
111 return (next != null);
112 }
114 public Instruction next() {
115 if (next == null)
116 throw new NoSuchElementException();
118 current = next;
119 pc += current.length();
120 next = (pc < code.length ? new Instruction(code, pc) : null);
121 return current;
122 }
124 public void remove() {
125 throw new UnsupportedOperationException("Not supported.");
126 }
128 Instruction current = null;
129 int pc = 0;
130 Instruction next = new Instruction(code, pc);
132 };
133 }
135 };
136 }
138 public final int max_stack;
139 public final int max_locals;
140 public final int code_length;
141 public final byte[] code;
142 public final int exception_table_langth;
143 public final Exception_data[] exception_table;
144 public final Attributes attributes;
146 public class Exception_data {
147 Exception_data(ClassReader cr) throws IOException {
148 start_pc = cr.readUnsignedShort();
149 end_pc = cr.readUnsignedShort();
150 handler_pc = cr.readUnsignedShort();
151 catch_type = cr.readUnsignedShort();
152 }
154 public final int start_pc;
155 public final int end_pc;
156 public final int handler_pc;
157 public final int catch_type;
158 }
159 }