Sun, 16 Dec 2012 11:09:36 +0100
8005098: Provide isSynthesized() information on Attribute.Compound
Reviewed-by: jjg
jjg@46 | 1 | /* |
ohair@554 | 2 | * Copyright (c) 2007, 2009, Oracle and/or its affiliates. All rights reserved. |
jjg@46 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
jjg@46 | 4 | * |
jjg@46 | 5 | * This code is free software; you can redistribute it and/or modify it |
jjg@46 | 6 | * under the terms of the GNU General Public License version 2 only, as |
ohair@554 | 7 | * published by the Free Software Foundation. Oracle designates this |
jjg@46 | 8 | * particular file as subject to the "Classpath" exception as provided |
ohair@554 | 9 | * by Oracle in the LICENSE file that accompanied this code. |
jjg@46 | 10 | * |
jjg@46 | 11 | * This code is distributed in the hope that it will be useful, but WITHOUT |
jjg@46 | 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
jjg@46 | 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
jjg@46 | 14 | * version 2 for more details (a copy is included in the LICENSE file that |
jjg@46 | 15 | * accompanied this code). |
jjg@46 | 16 | * |
jjg@46 | 17 | * You should have received a copy of the GNU General Public License version |
jjg@46 | 18 | * 2 along with this work; if not, write to the Free Software Foundation, |
jjg@46 | 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
jjg@46 | 20 | * |
ohair@554 | 21 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
ohair@554 | 22 | * or visit www.oracle.com if you need additional information or have any |
ohair@554 | 23 | * questions. |
jjg@46 | 24 | */ |
jjg@46 | 25 | |
jjg@46 | 26 | package com.sun.tools.classfile; |
jjg@46 | 27 | |
jjg@46 | 28 | import java.io.IOException; |
jjg@255 | 29 | import java.util.Iterator; |
jjg@255 | 30 | import java.util.NoSuchElementException; |
jjg@46 | 31 | |
jjg@46 | 32 | /** |
jjh@972 | 33 | * See JVMS, section 4.8.3. |
jjg@46 | 34 | * |
jjg@581 | 35 | * <p><b>This is NOT part of any supported API. |
jjg@581 | 36 | * If you write code that depends on this, you do so at your own risk. |
jjg@46 | 37 | * This code and its internal interfaces are subject to change or |
jjg@46 | 38 | * deletion without notice.</b> |
jjg@46 | 39 | */ |
jjg@46 | 40 | public class Code_attribute extends Attribute { |
jjg@46 | 41 | public class InvalidIndex extends AttributeException { |
jjg@198 | 42 | private static final long serialVersionUID = -8904527774589382802L; |
jjg@46 | 43 | InvalidIndex(int index) { |
jjg@46 | 44 | this.index = index; |
jjg@46 | 45 | } |
jjg@46 | 46 | |
jjg@46 | 47 | @Override |
jjg@46 | 48 | public String getMessage() { |
jjg@46 | 49 | // i18n |
jjg@46 | 50 | return "invalid index " + index + " in Code attribute"; |
jjg@46 | 51 | } |
jjg@46 | 52 | |
jjg@46 | 53 | public final int index; |
jjg@46 | 54 | } |
jjg@46 | 55 | |
jjg@46 | 56 | Code_attribute(ClassReader cr, int name_index, int length) |
jjg@46 | 57 | throws IOException, ConstantPoolException { |
jjg@46 | 58 | super(name_index, length); |
jjg@46 | 59 | max_stack = cr.readUnsignedShort(); |
jjg@46 | 60 | max_locals = cr.readUnsignedShort(); |
jjg@46 | 61 | code_length = cr.readInt(); |
jjg@46 | 62 | code = new byte[code_length]; |
jjg@46 | 63 | cr.readFully(code); |
jjg@46 | 64 | exception_table_langth = cr.readUnsignedShort(); |
jjg@46 | 65 | exception_table = new Exception_data[exception_table_langth]; |
jjg@46 | 66 | for (int i = 0; i < exception_table_langth; i++) |
jjg@46 | 67 | exception_table[i] = new Exception_data(cr); |
jjg@46 | 68 | attributes = new Attributes(cr); |
jjg@46 | 69 | } |
jjg@46 | 70 | |
jjg@46 | 71 | public int getByte(int offset) throws InvalidIndex { |
jjg@46 | 72 | if (offset < 0 || offset >= code.length) |
jjg@46 | 73 | throw new InvalidIndex(offset); |
jjg@46 | 74 | return code[offset]; |
jjg@46 | 75 | } |
jjg@46 | 76 | |
jjg@46 | 77 | public int getUnsignedByte(int offset) throws InvalidIndex { |
jjg@46 | 78 | if (offset < 0 || offset >= code.length) |
jjg@46 | 79 | throw new InvalidIndex(offset); |
jjg@46 | 80 | return code[offset] & 0xff; |
jjg@46 | 81 | } |
jjg@46 | 82 | |
jjg@46 | 83 | public int getShort(int offset) throws InvalidIndex { |
jjg@46 | 84 | if (offset < 0 || offset + 1 >= code.length) |
jjg@46 | 85 | throw new InvalidIndex(offset); |
jjg@46 | 86 | return (code[offset] << 8) | (code[offset + 1] & 0xFF); |
jjg@46 | 87 | } |
jjg@46 | 88 | |
jjg@46 | 89 | public int getUnsignedShort(int offset) throws InvalidIndex { |
jjg@46 | 90 | if (offset < 0 || offset + 1 >= code.length) |
jjg@46 | 91 | throw new InvalidIndex(offset); |
jjg@46 | 92 | return ((code[offset] << 8) | (code[offset + 1] & 0xFF)) & 0xFFFF; |
jjg@46 | 93 | } |
jjg@46 | 94 | |
jjg@46 | 95 | public int getInt(int offset) throws InvalidIndex { |
jjg@46 | 96 | if (offset < 0 || offset + 3 >= code.length) |
jjg@46 | 97 | throw new InvalidIndex(offset); |
jjg@46 | 98 | return (getShort(offset) << 16) | (getShort(offset + 2) & 0xFFFF); |
jjg@46 | 99 | } |
jjg@46 | 100 | |
jjg@46 | 101 | public <R, D> R accept(Visitor<R, D> visitor, D data) { |
jjg@46 | 102 | return visitor.visitCode(this, data); |
jjg@46 | 103 | } |
jjg@46 | 104 | |
jjg@255 | 105 | public Iterable<Instruction> getInstructions() { |
jjg@255 | 106 | return new Iterable<Instruction>() { |
jjg@255 | 107 | public Iterator<Instruction> iterator() { |
jjg@255 | 108 | return new Iterator<Instruction>() { |
jjg@255 | 109 | |
jjg@255 | 110 | public boolean hasNext() { |
jjg@255 | 111 | return (next != null); |
jjg@255 | 112 | } |
jjg@255 | 113 | |
jjg@255 | 114 | public Instruction next() { |
jjg@255 | 115 | if (next == null) |
jjg@255 | 116 | throw new NoSuchElementException(); |
jjg@255 | 117 | |
jjg@255 | 118 | current = next; |
jjg@255 | 119 | pc += current.length(); |
jjg@255 | 120 | next = (pc < code.length ? new Instruction(code, pc) : null); |
jjg@255 | 121 | return current; |
jjg@255 | 122 | } |
jjg@255 | 123 | |
jjg@255 | 124 | public void remove() { |
jjg@255 | 125 | throw new UnsupportedOperationException("Not supported."); |
jjg@255 | 126 | } |
jjg@255 | 127 | |
jjg@255 | 128 | Instruction current = null; |
jjg@255 | 129 | int pc = 0; |
jjg@255 | 130 | Instruction next = new Instruction(code, pc); |
jjg@255 | 131 | |
jjg@255 | 132 | }; |
jjg@255 | 133 | } |
jjg@255 | 134 | |
jjg@255 | 135 | }; |
jjg@255 | 136 | } |
jjg@255 | 137 | |
jjg@46 | 138 | public final int max_stack; |
jjg@46 | 139 | public final int max_locals; |
jjg@46 | 140 | public final int code_length; |
jjg@46 | 141 | public final byte[] code; |
jjg@46 | 142 | public final int exception_table_langth; |
jjg@46 | 143 | public final Exception_data[] exception_table; |
jjg@46 | 144 | public final Attributes attributes; |
jjg@46 | 145 | |
jjg@46 | 146 | public class Exception_data { |
jjg@46 | 147 | Exception_data(ClassReader cr) throws IOException { |
jjg@46 | 148 | start_pc = cr.readUnsignedShort(); |
jjg@46 | 149 | end_pc = cr.readUnsignedShort(); |
jjg@46 | 150 | handler_pc = cr.readUnsignedShort(); |
jjg@46 | 151 | catch_type = cr.readUnsignedShort(); |
jjg@46 | 152 | } |
jjg@46 | 153 | |
jjg@46 | 154 | public final int start_pc; |
jjg@46 | 155 | public final int end_pc; |
jjg@46 | 156 | public final int handler_pc; |
jjg@46 | 157 | public final int catch_type; |
jjg@46 | 158 | } |
jjg@46 | 159 | } |