author | mkos |
Sun, 30 Dec 2012 00:00:00 +0100 | |
changeset 22678 | ac1ea46be942 |
parent 12009 | 4abb694f273a |
permissions | -rw-r--r-- |
12009 | 1 |
/* |
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ac1ea46be942
8029237: Update copyright year to match last edit in jaxws repository for 2012
mkos
parents:
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diff
changeset
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* Copyright (c) 2005, 2012, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. Oracle designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Oracle in the LICENSE file that accompanied this code. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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/* |
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* This file is available under and governed by the GNU General Public |
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* License version 2 only, as published by the Free Software Foundation. |
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* However, the following notice accompanied the original version of this |
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* file: |
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* |
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* ASM: a very small and fast Java bytecode manipulation framework |
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* Copyright (c) 2000-2007 INRIA, France Telecom |
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* All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* 3. Neither the name of the copyright holders nor the names of its |
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* contributors may be used to endorse or promote products derived from |
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* this software without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE |
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF |
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* THE POSSIBILITY OF SUCH DAMAGE. |
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*/ |
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package com.sun.xml.internal.ws.org.objectweb.asm; |
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import java.io.InputStream; |
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import java.io.IOException; |
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/** |
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* A Java class parser to make a {@link ClassVisitor} visit an existing class. |
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* This class parses a byte array conforming to the Java class file format and |
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* calls the appropriate visit methods of a given class visitor for each field, |
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* method and bytecode instruction encountered. |
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* |
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* @author Eric Bruneton |
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* @author Eugene Kuleshov |
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*/ |
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public class ClassReader { |
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/** |
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* True to enable signatures support. |
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*/ |
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static final boolean SIGNATURES = true; |
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/** |
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* True to enable annotations support. |
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*/ |
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static final boolean ANNOTATIONS = true; |
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/** |
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* True to enable stack map frames support. |
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*/ |
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static final boolean FRAMES = true; |
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/** |
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* True to enable bytecode writing support. |
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*/ |
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static final boolean WRITER = true; |
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/** |
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* True to enable JSR_W and GOTO_W support. |
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*/ |
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static final boolean RESIZE = true; |
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/** |
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* Flag to skip method code. If this class is set <code>CODE</code> |
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* attribute won't be visited. This can be used, for example, to retrieve |
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* annotations for methods and method parameters. |
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*/ |
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public static final int SKIP_CODE = 1; |
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/** |
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* Flag to skip the debug information in the class. If this flag is set the |
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* debug information of the class is not visited, i.e. the |
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* {@link MethodVisitor#visitLocalVariable visitLocalVariable} and |
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* {@link MethodVisitor#visitLineNumber visitLineNumber} methods will not be |
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* called. |
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*/ |
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public static final int SKIP_DEBUG = 2; |
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/** |
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* Flag to skip the stack map frames in the class. If this flag is set the |
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* stack map frames of the class is not visited, i.e. the |
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* {@link MethodVisitor#visitFrame visitFrame} method will not be called. |
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* This flag is useful when the {@link ClassWriter#COMPUTE_FRAMES} option is |
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* used: it avoids visiting frames that will be ignored and recomputed from |
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* scratch in the class writer. |
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*/ |
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public static final int SKIP_FRAMES = 4; |
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/** |
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* Flag to expand the stack map frames. By default stack map frames are |
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* visited in their original format (i.e. "expanded" for classes whose |
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* version is less than V1_6, and "compressed" for the other classes). If |
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* this flag is set, stack map frames are always visited in expanded format |
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* (this option adds a decompression/recompression step in ClassReader and |
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* ClassWriter which degrades performances quite a lot). |
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*/ |
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public static final int EXPAND_FRAMES = 8; |
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/** |
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* The class to be parsed. <i>The content of this array must not be |
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* modified. This field is intended for {@link Attribute} sub classes, and |
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* is normally not needed by class generators or adapters.</i> |
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*/ |
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public final byte[] b; |
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/** |
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* The start index of each constant pool item in {@link #b b}, plus one. |
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* The one byte offset skips the constant pool item tag that indicates its |
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* type. |
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*/ |
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private final int[] items; |
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/** |
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* The String objects corresponding to the CONSTANT_Utf8 items. This cache |
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* avoids multiple parsing of a given CONSTANT_Utf8 constant pool item, |
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* which GREATLY improves performances (by a factor 2 to 3). This caching |
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* strategy could be extended to all constant pool items, but its benefit |
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* would not be so great for these items (because they are much less |
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* expensive to parse than CONSTANT_Utf8 items). |
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*/ |
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private final String[] strings; |
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/** |
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* Maximum length of the strings contained in the constant pool of the |
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* class. |
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*/ |
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private final int maxStringLength; |
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/** |
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* Start index of the class header information (access, name...) in |
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* {@link #b b}. |
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*/ |
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public final int header; |
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// ------------------------------------------------------------------------ |
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// Constructors |
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// ------------------------------------------------------------------------ |
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/** |
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* Constructs a new {@link ClassReader} object. |
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* |
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* @param b the bytecode of the class to be read. |
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*/ |
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public ClassReader(final byte[] b) { |
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this(b, 0, b.length); |
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} |
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/** |
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* Constructs a new {@link ClassReader} object. |
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* |
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* @param b the bytecode of the class to be read. |
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* @param off the start offset of the class data. |
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* @param len the length of the class data. |
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*/ |
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public ClassReader(final byte[] b, final int off, final int len) { |
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this.b = b; |
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// parses the constant pool |
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items = new int[readUnsignedShort(off + 8)]; |
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int n = items.length; |
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strings = new String[n]; |
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int max = 0; |
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int index = off + 10; |
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for (int i = 1; i < n; ++i) { |
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items[i] = index + 1; |
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int size; |
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switch (b[index]) { |
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case ClassWriter.FIELD: |
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case ClassWriter.METH: |
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case ClassWriter.IMETH: |
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case ClassWriter.INT: |
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case ClassWriter.FLOAT: |
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case ClassWriter.NAME_TYPE: |
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size = 5; |
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break; |
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case ClassWriter.LONG: |
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case ClassWriter.DOUBLE: |
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size = 9; |
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++i; |
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break; |
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case ClassWriter.UTF8: |
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size = 3 + readUnsignedShort(index + 1); |
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if (size > max) { |
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max = size; |
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} |
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break; |
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// case ClassWriter.CLASS: |
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// case ClassWriter.STR: |
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default: |
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size = 3; |
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break; |
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} |
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index += size; |
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} |
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maxStringLength = max; |
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// the class header information starts just after the constant pool |
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header = index; |
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} |
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/** |
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* Returns the class's access flags (see {@link Opcodes}). This value may |
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* not reflect Deprecated and Synthetic flags when bytecode is before 1.5 |
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* and those flags are represented by attributes. |
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* |
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* @return the class access flags |
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* |
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* @see ClassVisitor#visit(int, int, String, String, String, String[]) |
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*/ |
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public int getAccess() { |
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return readUnsignedShort(header); |
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} |
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/** |
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* Returns the internal name of the class (see |
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* {@link Type#getInternalName() getInternalName}). |
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* |
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* @return the internal class name |
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* |
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* @see ClassVisitor#visit(int, int, String, String, String, String[]) |
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*/ |
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public String getClassName() { |
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return readClass(header + 2, new char[maxStringLength]); |
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} |
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/** |
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* Returns the internal of name of the super class (see |
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* {@link Type#getInternalName() getInternalName}). For interfaces, the |
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* super class is {@link Object}. |
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* |
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* @return the internal name of super class, or <tt>null</tt> for |
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* {@link Object} class. |
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* |
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* @see ClassVisitor#visit(int, int, String, String, String, String[]) |
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*/ |
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public String getSuperName() { |
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int n = items[readUnsignedShort(header + 4)]; |
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return n == 0 ? null : readUTF8(n, new char[maxStringLength]); |
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} |
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/** |
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* Returns the internal names of the class's interfaces (see |
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* {@link Type#getInternalName() getInternalName}). |
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* |
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* @return the array of internal names for all implemented interfaces or |
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* <tt>null</tt>. |
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* |
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* @see ClassVisitor#visit(int, int, String, String, String, String[]) |
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*/ |
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public String[] getInterfaces() { |
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int index = header + 6; |
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int n = readUnsignedShort(index); |
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String[] interfaces = new String[n]; |
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if (n > 0) { |
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char[] buf = new char[maxStringLength]; |
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for (int i = 0; i < n; ++i) { |
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index += 2; |
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interfaces[i] = readClass(index, buf); |
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} |
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} |
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return interfaces; |
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} |
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299 |
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300 |
/** |
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* Copies the constant pool data into the given {@link ClassWriter}. Should |
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* be called before the {@link #accept(ClassVisitor,int)} method. |
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* |
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* @param classWriter the {@link ClassWriter} to copy constant pool into. |
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*/ |
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void copyPool(final ClassWriter classWriter) { |
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char[] buf = new char[maxStringLength]; |
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int ll = items.length; |
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309 |
Item[] items2 = new Item[ll]; |
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for (int i = 1; i < ll; i++) { |
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int index = items[i]; |
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int tag = b[index - 1]; |
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Item item = new Item(i); |
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int nameType; |
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switch (tag) { |
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case ClassWriter.FIELD: |
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case ClassWriter.METH: |
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case ClassWriter.IMETH: |
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nameType = items[readUnsignedShort(index + 2)]; |
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item.set(tag, |
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readClass(index, buf), |
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readUTF8(nameType, buf), |
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readUTF8(nameType + 2, buf)); |
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break; |
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325 |
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326 |
case ClassWriter.INT: |
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item.set(readInt(index)); |
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break; |
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329 |
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330 |
case ClassWriter.FLOAT: |
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item.set(Float.intBitsToFloat(readInt(index))); |
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break; |
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333 |
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334 |
case ClassWriter.NAME_TYPE: |
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item.set(tag, |
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readUTF8(index, buf), |
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337 |
readUTF8(index + 2, buf), |
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null); |
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break; |
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340 |
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341 |
case ClassWriter.LONG: |
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item.set(readLong(index)); |
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++i; |
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344 |
break; |
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345 |
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346 |
case ClassWriter.DOUBLE: |
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347 |
item.set(Double.longBitsToDouble(readLong(index))); |
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348 |
++i; |
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349 |
break; |
|
350 |
||
351 |
case ClassWriter.UTF8: { |
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352 |
String s = strings[i]; |
|
353 |
if (s == null) { |
|
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index = items[i]; |
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355 |
s = strings[i] = readUTF(index + 2, |
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356 |
readUnsignedShort(index), |
|
357 |
buf); |
|
358 |
} |
|
359 |
item.set(tag, s, null, null); |
|
360 |
} |
|
361 |
break; |
|
362 |
||
363 |
// case ClassWriter.STR: |
|
364 |
// case ClassWriter.CLASS: |
|
365 |
default: |
|
366 |
item.set(tag, readUTF8(index, buf), null, null); |
|
367 |
break; |
|
368 |
} |
|
369 |
||
370 |
int index2 = item.hashCode % items2.length; |
|
371 |
item.next = items2[index2]; |
|
372 |
items2[index2] = item; |
|
373 |
} |
|
374 |
||
375 |
int off = items[1] - 1; |
|
376 |
classWriter.pool.putByteArray(b, off, header - off); |
|
377 |
classWriter.items = items2; |
|
378 |
classWriter.threshold = (int) (0.75d * ll); |
|
379 |
classWriter.index = ll; |
|
380 |
} |
|
381 |
||
382 |
/** |
|
383 |
* Constructs a new {@link ClassReader} object. |
|
384 |
* |
|
385 |
* @param is an input stream from which to read the class. |
|
386 |
* @throws IOException if a problem occurs during reading. |
|
387 |
*/ |
|
388 |
public ClassReader(final InputStream is) throws IOException { |
|
389 |
this(readClass(is)); |
|
390 |
} |
|
391 |
||
392 |
/** |
|
393 |
* Constructs a new {@link ClassReader} object. |
|
394 |
* |
|
395 |
* @param name the fully qualified name of the class to be read. |
|
396 |
* @throws IOException if an exception occurs during reading. |
|
397 |
*/ |
|
398 |
public ClassReader(final String name) throws IOException { |
|
399 |
this(ClassLoader.getSystemResourceAsStream(name.replace('.', '/') |
|
400 |
+ ".class")); |
|
401 |
} |
|
402 |
||
403 |
/** |
|
404 |
* Reads the bytecode of a class. |
|
405 |
* |
|
406 |
* @param is an input stream from which to read the class. |
|
407 |
* @return the bytecode read from the given input stream. |
|
408 |
* @throws IOException if a problem occurs during reading. |
|
409 |
*/ |
|
410 |
private static byte[] readClass(final InputStream is) throws IOException { |
|
411 |
if (is == null) { |
|
412 |
throw new IOException("Class not found"); |
|
413 |
} |
|
414 |
byte[] b = new byte[is.available()]; |
|
415 |
int len = 0; |
|
416 |
while (true) { |
|
417 |
int n = is.read(b, len, b.length - len); |
|
418 |
if (n == -1) { |
|
419 |
if (len < b.length) { |
|
420 |
byte[] c = new byte[len]; |
|
421 |
System.arraycopy(b, 0, c, 0, len); |
|
422 |
b = c; |
|
423 |
} |
|
424 |
return b; |
|
425 |
} |
|
426 |
len += n; |
|
427 |
if (len == b.length) { |
|
428 |
byte[] c = new byte[b.length + 1000]; |
|
429 |
System.arraycopy(b, 0, c, 0, len); |
|
430 |
b = c; |
|
431 |
} |
|
432 |
} |
|
433 |
} |
|
434 |
||
435 |
// ------------------------------------------------------------------------ |
|
436 |
// Public methods |
|
437 |
// ------------------------------------------------------------------------ |
|
438 |
||
439 |
/** |
|
440 |
* Makes the given visitor visit the Java class of this {@link ClassReader}. |
|
441 |
* This class is the one specified in the constructor (see |
|
442 |
* {@link #ClassReader(byte[]) ClassReader}). |
|
443 |
* |
|
444 |
* @param classVisitor the visitor that must visit this class. |
|
445 |
* @param flags option flags that can be used to modify the default behavior |
|
446 |
* of this class. See {@link #SKIP_DEBUG}, {@link #EXPAND_FRAMES}, |
|
447 |
* {@link #SKIP_FRAMES}, {@link #SKIP_CODE}. |
|
448 |
*/ |
|
449 |
public void accept(final ClassVisitor classVisitor, final int flags) { |
|
450 |
accept(classVisitor, new Attribute[0], flags); |
|
451 |
} |
|
452 |
||
453 |
/** |
|
454 |
* Makes the given visitor visit the Java class of this {@link ClassReader}. |
|
455 |
* This class is the one specified in the constructor (see |
|
456 |
* {@link #ClassReader(byte[]) ClassReader}). |
|
457 |
* |
|
458 |
* @param classVisitor the visitor that must visit this class. |
|
459 |
* @param attrs prototypes of the attributes that must be parsed during the |
|
460 |
* visit of the class. Any attribute whose type is not equal to the |
|
461 |
* type of one the prototypes will not be parsed: its byte array |
|
462 |
* value will be passed unchanged to the ClassWriter. <i>This may |
|
463 |
* corrupt it if this value contains references to the constant pool, |
|
464 |
* or has syntactic or semantic links with a class element that has |
|
465 |
* been transformed by a class adapter between the reader and the |
|
466 |
* writer</i>. |
|
467 |
* @param flags option flags that can be used to modify the default behavior |
|
468 |
* of this class. See {@link #SKIP_DEBUG}, {@link #EXPAND_FRAMES}, |
|
469 |
* {@link #SKIP_FRAMES}, {@link #SKIP_CODE}. |
|
470 |
*/ |
|
471 |
public void accept( |
|
472 |
final ClassVisitor classVisitor, |
|
473 |
final Attribute[] attrs, |
|
474 |
final int flags) |
|
475 |
{ |
|
476 |
byte[] b = this.b; // the bytecode array |
|
477 |
char[] c = new char[maxStringLength]; // buffer used to read strings |
|
478 |
int i, j, k; // loop variables |
|
479 |
int u, v, w; // indexes in b |
|
480 |
Attribute attr; |
|
481 |
||
482 |
int access; |
|
483 |
String name; |
|
484 |
String desc; |
|
485 |
String attrName; |
|
486 |
String signature; |
|
487 |
int anns = 0; |
|
488 |
int ianns = 0; |
|
489 |
Attribute cattrs = null; |
|
490 |
||
491 |
// visits the header |
|
492 |
u = header; |
|
493 |
access = readUnsignedShort(u); |
|
494 |
name = readClass(u + 2, c); |
|
495 |
v = items[readUnsignedShort(u + 4)]; |
|
496 |
String superClassName = v == 0 ? null : readUTF8(v, c); |
|
497 |
String[] implementedItfs = new String[readUnsignedShort(u + 6)]; |
|
498 |
w = 0; |
|
499 |
u += 8; |
|
500 |
for (i = 0; i < implementedItfs.length; ++i) { |
|
501 |
implementedItfs[i] = readClass(u, c); |
|
502 |
u += 2; |
|
503 |
} |
|
504 |
||
505 |
boolean skipCode = (flags & SKIP_CODE) != 0; |
|
506 |
boolean skipDebug = (flags & SKIP_DEBUG) != 0; |
|
507 |
boolean unzip = (flags & EXPAND_FRAMES) != 0; |
|
508 |
||
509 |
// skips fields and methods |
|
510 |
v = u; |
|
511 |
i = readUnsignedShort(v); |
|
512 |
v += 2; |
|
513 |
for (; i > 0; --i) { |
|
514 |
j = readUnsignedShort(v + 6); |
|
515 |
v += 8; |
|
516 |
for (; j > 0; --j) { |
|
517 |
v += 6 + readInt(v + 2); |
|
518 |
} |
|
519 |
} |
|
520 |
i = readUnsignedShort(v); |
|
521 |
v += 2; |
|
522 |
for (; i > 0; --i) { |
|
523 |
j = readUnsignedShort(v + 6); |
|
524 |
v += 8; |
|
525 |
for (; j > 0; --j) { |
|
526 |
v += 6 + readInt(v + 2); |
|
527 |
} |
|
528 |
} |
|
529 |
// reads the class's attributes |
|
530 |
signature = null; |
|
531 |
String sourceFile = null; |
|
532 |
String sourceDebug = null; |
|
533 |
String enclosingOwner = null; |
|
534 |
String enclosingName = null; |
|
535 |
String enclosingDesc = null; |
|
536 |
||
537 |
i = readUnsignedShort(v); |
|
538 |
v += 2; |
|
539 |
for (; i > 0; --i) { |
|
540 |
attrName = readUTF8(v, c); |
|
541 |
// tests are sorted in decreasing frequency order |
|
542 |
// (based on frequencies observed on typical classes) |
|
543 |
if ("SourceFile".equals(attrName)) { |
|
544 |
sourceFile = readUTF8(v + 6, c); |
|
545 |
} else if ("InnerClasses".equals(attrName)) { |
|
546 |
w = v + 6; |
|
547 |
} else if ("EnclosingMethod".equals(attrName)) { |
|
548 |
enclosingOwner = readClass(v + 6, c); |
|
549 |
int item = readUnsignedShort(v + 8); |
|
550 |
if (item != 0) { |
|
551 |
enclosingName = readUTF8(items[item], c); |
|
552 |
enclosingDesc = readUTF8(items[item] + 2, c); |
|
553 |
} |
|
554 |
} else if (SIGNATURES && "Signature".equals(attrName)) { |
|
555 |
signature = readUTF8(v + 6, c); |
|
556 |
} else if (ANNOTATIONS && "RuntimeVisibleAnnotations".equals(attrName)) { |
|
557 |
anns = v + 6; |
|
558 |
} else if ("Deprecated".equals(attrName)) { |
|
559 |
access |= Opcodes.ACC_DEPRECATED; |
|
560 |
} else if ("Synthetic".equals(attrName)) { |
|
561 |
access |= Opcodes.ACC_SYNTHETIC; |
|
562 |
} else if ("SourceDebugExtension".equals(attrName)) { |
|
563 |
int len = readInt(v + 2); |
|
564 |
sourceDebug = readUTF(v + 6, len, new char[len]); |
|
565 |
} else if (ANNOTATIONS && "RuntimeInvisibleAnnotations".equals(attrName)) { |
|
566 |
ianns = v + 6; |
|
567 |
} else { |
|
568 |
attr = readAttribute(attrs, |
|
569 |
attrName, |
|
570 |
v + 6, |
|
571 |
readInt(v + 2), |
|
572 |
c, |
|
573 |
-1, |
|
574 |
null); |
|
575 |
if (attr != null) { |
|
576 |
attr.next = cattrs; |
|
577 |
cattrs = attr; |
|
578 |
} |
|
579 |
} |
|
580 |
v += 6 + readInt(v + 2); |
|
581 |
} |
|
582 |
// calls the visit method |
|
583 |
classVisitor.visit(readInt(4), |
|
584 |
access, |
|
585 |
name, |
|
586 |
signature, |
|
587 |
superClassName, |
|
588 |
implementedItfs); |
|
589 |
||
590 |
// calls the visitSource method |
|
591 |
if (!skipDebug && (sourceFile != null || sourceDebug != null)) { |
|
592 |
classVisitor.visitSource(sourceFile, sourceDebug); |
|
593 |
} |
|
594 |
||
595 |
// calls the visitOuterClass method |
|
596 |
if (enclosingOwner != null) { |
|
597 |
classVisitor.visitOuterClass(enclosingOwner, |
|
598 |
enclosingName, |
|
599 |
enclosingDesc); |
|
600 |
} |
|
601 |
||
602 |
// visits the class annotations |
|
603 |
if (ANNOTATIONS) { |
|
604 |
for (i = 1; i >= 0; --i) { |
|
605 |
v = i == 0 ? ianns : anns; |
|
606 |
if (v != 0) { |
|
607 |
j = readUnsignedShort(v); |
|
608 |
v += 2; |
|
609 |
for (; j > 0; --j) { |
|
610 |
v = readAnnotationValues(v + 2, |
|
611 |
c, |
|
612 |
true, |
|
613 |
classVisitor.visitAnnotation(readUTF8(v, c), i != 0)); |
|
614 |
} |
|
615 |
} |
|
616 |
} |
|
617 |
} |
|
618 |
||
619 |
// visits the class attributes |
|
620 |
while (cattrs != null) { |
|
621 |
attr = cattrs.next; |
|
622 |
cattrs.next = null; |
|
623 |
classVisitor.visitAttribute(cattrs); |
|
624 |
cattrs = attr; |
|
625 |
} |
|
626 |
||
627 |
// calls the visitInnerClass method |
|
628 |
if (w != 0) { |
|
629 |
i = readUnsignedShort(w); |
|
630 |
w += 2; |
|
631 |
for (; i > 0; --i) { |
|
632 |
classVisitor.visitInnerClass(readUnsignedShort(w) == 0 |
|
633 |
? null |
|
634 |
: readClass(w, c), readUnsignedShort(w + 2) == 0 |
|
635 |
? null |
|
636 |
: readClass(w + 2, c), readUnsignedShort(w + 4) == 0 |
|
637 |
? null |
|
638 |
: readUTF8(w + 4, c), readUnsignedShort(w + 6)); |
|
639 |
w += 8; |
|
640 |
} |
|
641 |
} |
|
642 |
||
643 |
// visits the fields |
|
644 |
i = readUnsignedShort(u); |
|
645 |
u += 2; |
|
646 |
for (; i > 0; --i) { |
|
647 |
access = readUnsignedShort(u); |
|
648 |
name = readUTF8(u + 2, c); |
|
649 |
desc = readUTF8(u + 4, c); |
|
650 |
// visits the field's attributes and looks for a ConstantValue |
|
651 |
// attribute |
|
652 |
int fieldValueItem = 0; |
|
653 |
signature = null; |
|
654 |
anns = 0; |
|
655 |
ianns = 0; |
|
656 |
cattrs = null; |
|
657 |
||
658 |
j = readUnsignedShort(u + 6); |
|
659 |
u += 8; |
|
660 |
for (; j > 0; --j) { |
|
661 |
attrName = readUTF8(u, c); |
|
662 |
// tests are sorted in decreasing frequency order |
|
663 |
// (based on frequencies observed on typical classes) |
|
664 |
if ("ConstantValue".equals(attrName)) { |
|
665 |
fieldValueItem = readUnsignedShort(u + 6); |
|
666 |
} else if (SIGNATURES && "Signature".equals(attrName)) { |
|
667 |
signature = readUTF8(u + 6, c); |
|
668 |
} else if ("Deprecated".equals(attrName)) { |
|
669 |
access |= Opcodes.ACC_DEPRECATED; |
|
670 |
} else if ("Synthetic".equals(attrName)) { |
|
671 |
access |= Opcodes.ACC_SYNTHETIC; |
|
672 |
} else if (ANNOTATIONS && "RuntimeVisibleAnnotations".equals(attrName)) { |
|
673 |
anns = u + 6; |
|
674 |
} else if (ANNOTATIONS && "RuntimeInvisibleAnnotations".equals(attrName)) { |
|
675 |
ianns = u + 6; |
|
676 |
} else { |
|
677 |
attr = readAttribute(attrs, |
|
678 |
attrName, |
|
679 |
u + 6, |
|
680 |
readInt(u + 2), |
|
681 |
c, |
|
682 |
-1, |
|
683 |
null); |
|
684 |
if (attr != null) { |
|
685 |
attr.next = cattrs; |
|
686 |
cattrs = attr; |
|
687 |
} |
|
688 |
} |
|
689 |
u += 6 + readInt(u + 2); |
|
690 |
} |
|
691 |
// visits the field |
|
692 |
FieldVisitor fv = classVisitor.visitField(access, |
|
693 |
name, |
|
694 |
desc, |
|
695 |
signature, |
|
696 |
fieldValueItem == 0 ? null : readConst(fieldValueItem, c)); |
|
697 |
// visits the field annotations and attributes |
|
698 |
if (fv != null) { |
|
699 |
if (ANNOTATIONS) { |
|
700 |
for (j = 1; j >= 0; --j) { |
|
701 |
v = j == 0 ? ianns : anns; |
|
702 |
if (v != 0) { |
|
703 |
k = readUnsignedShort(v); |
|
704 |
v += 2; |
|
705 |
for (; k > 0; --k) { |
|
706 |
v = readAnnotationValues(v + 2, |
|
707 |
c, |
|
708 |
true, |
|
709 |
fv.visitAnnotation(readUTF8(v, c), j != 0)); |
|
710 |
} |
|
711 |
} |
|
712 |
} |
|
713 |
} |
|
714 |
while (cattrs != null) { |
|
715 |
attr = cattrs.next; |
|
716 |
cattrs.next = null; |
|
717 |
fv.visitAttribute(cattrs); |
|
718 |
cattrs = attr; |
|
719 |
} |
|
720 |
fv.visitEnd(); |
|
721 |
} |
|
722 |
} |
|
723 |
||
724 |
// visits the methods |
|
725 |
i = readUnsignedShort(u); |
|
726 |
u += 2; |
|
727 |
for (; i > 0; --i) { |
|
728 |
int u0 = u + 6; |
|
729 |
access = readUnsignedShort(u); |
|
730 |
name = readUTF8(u + 2, c); |
|
731 |
desc = readUTF8(u + 4, c); |
|
732 |
signature = null; |
|
733 |
anns = 0; |
|
734 |
ianns = 0; |
|
735 |
int dann = 0; |
|
736 |
int mpanns = 0; |
|
737 |
int impanns = 0; |
|
738 |
cattrs = null; |
|
739 |
v = 0; |
|
740 |
w = 0; |
|
741 |
||
742 |
// looks for Code and Exceptions attributes |
|
743 |
j = readUnsignedShort(u + 6); |
|
744 |
u += 8; |
|
745 |
for (; j > 0; --j) { |
|
746 |
attrName = readUTF8(u, c); |
|
747 |
int attrSize = readInt(u + 2); |
|
748 |
u += 6; |
|
749 |
// tests are sorted in decreasing frequency order |
|
750 |
// (based on frequencies observed on typical classes) |
|
751 |
if ("Code".equals(attrName)) { |
|
752 |
if (!skipCode) { |
|
753 |
v = u; |
|
754 |
} |
|
755 |
} else if ("Exceptions".equals(attrName)) { |
|
756 |
w = u; |
|
757 |
} else if (SIGNATURES && "Signature".equals(attrName)) { |
|
758 |
signature = readUTF8(u, c); |
|
759 |
} else if ("Deprecated".equals(attrName)) { |
|
760 |
access |= Opcodes.ACC_DEPRECATED; |
|
761 |
} else if (ANNOTATIONS && "RuntimeVisibleAnnotations".equals(attrName)) { |
|
762 |
anns = u; |
|
763 |
} else if (ANNOTATIONS && "AnnotationDefault".equals(attrName)) { |
|
764 |
dann = u; |
|
765 |
} else if ("Synthetic".equals(attrName)) { |
|
766 |
access |= Opcodes.ACC_SYNTHETIC; |
|
767 |
} else if (ANNOTATIONS && "RuntimeInvisibleAnnotations".equals(attrName)) { |
|
768 |
ianns = u; |
|
769 |
} else if (ANNOTATIONS && "RuntimeVisibleParameterAnnotations".equals(attrName)) |
|
770 |
{ |
|
771 |
mpanns = u; |
|
772 |
} else if (ANNOTATIONS && "RuntimeInvisibleParameterAnnotations".equals(attrName)) |
|
773 |
{ |
|
774 |
impanns = u; |
|
775 |
} else { |
|
776 |
attr = readAttribute(attrs, |
|
777 |
attrName, |
|
778 |
u, |
|
779 |
attrSize, |
|
780 |
c, |
|
781 |
-1, |
|
782 |
null); |
|
783 |
if (attr != null) { |
|
784 |
attr.next = cattrs; |
|
785 |
cattrs = attr; |
|
786 |
} |
|
787 |
} |
|
788 |
u += attrSize; |
|
789 |
} |
|
790 |
// reads declared exceptions |
|
791 |
String[] exceptions; |
|
792 |
if (w == 0) { |
|
793 |
exceptions = null; |
|
794 |
} else { |
|
795 |
exceptions = new String[readUnsignedShort(w)]; |
|
796 |
w += 2; |
|
797 |
for (j = 0; j < exceptions.length; ++j) { |
|
798 |
exceptions[j] = readClass(w, c); |
|
799 |
w += 2; |
|
800 |
} |
|
801 |
} |
|
802 |
||
803 |
// visits the method's code, if any |
|
804 |
MethodVisitor mv = classVisitor.visitMethod(access, |
|
805 |
name, |
|
806 |
desc, |
|
807 |
signature, |
|
808 |
exceptions); |
|
809 |
||
810 |
if (mv != null) { |
|
811 |
/* |
|
812 |
* if the returned MethodVisitor is in fact a MethodWriter, it |
|
813 |
* means there is no method adapter between the reader and the |
|
814 |
* writer. If, in addition, the writer's constant pool was |
|
815 |
* copied from this reader (mw.cw.cr == this), and the signature |
|
816 |
* and exceptions of the method have not been changed, then it |
|
817 |
* is possible to skip all visit events and just copy the |
|
818 |
* original code of the method to the writer (the access, name |
|
819 |
* and descriptor can have been changed, this is not important |
|
820 |
* since they are not copied as is from the reader). |
|
821 |
*/ |
|
822 |
if (WRITER && mv instanceof MethodWriter) { |
|
823 |
MethodWriter mw = (MethodWriter) mv; |
|
824 |
if (mw.cw.cr == this) { |
|
825 |
if (signature == mw.signature) { |
|
826 |
boolean sameExceptions = false; |
|
827 |
if (exceptions == null) { |
|
828 |
sameExceptions = mw.exceptionCount == 0; |
|
829 |
} else { |
|
830 |
if (exceptions.length == mw.exceptionCount) { |
|
831 |
sameExceptions = true; |
|
832 |
for (j = exceptions.length - 1; j >= 0; --j) |
|
833 |
{ |
|
834 |
w -= 2; |
|
835 |
if (mw.exceptions[j] != readUnsignedShort(w)) |
|
836 |
{ |
|
837 |
sameExceptions = false; |
|
838 |
break; |
|
839 |
} |
|
840 |
} |
|
841 |
} |
|
842 |
} |
|
843 |
if (sameExceptions) { |
|
844 |
/* |
|
845 |
* we do not copy directly the code into |
|
846 |
* MethodWriter to save a byte array copy |
|
847 |
* operation. The real copy will be done in |
|
848 |
* ClassWriter.toByteArray(). |
|
849 |
*/ |
|
850 |
mw.classReaderOffset = u0; |
|
851 |
mw.classReaderLength = u - u0; |
|
852 |
continue; |
|
853 |
} |
|
854 |
} |
|
855 |
} |
|
856 |
} |
|
857 |
||
858 |
if (ANNOTATIONS && dann != 0) { |
|
859 |
AnnotationVisitor dv = mv.visitAnnotationDefault(); |
|
860 |
readAnnotationValue(dann, c, null, dv); |
|
861 |
if (dv != null) { |
|
862 |
dv.visitEnd(); |
|
863 |
} |
|
864 |
} |
|
865 |
if (ANNOTATIONS) { |
|
866 |
for (j = 1; j >= 0; --j) { |
|
867 |
w = j == 0 ? ianns : anns; |
|
868 |
if (w != 0) { |
|
869 |
k = readUnsignedShort(w); |
|
870 |
w += 2; |
|
871 |
for (; k > 0; --k) { |
|
872 |
w = readAnnotationValues(w + 2, |
|
873 |
c, |
|
874 |
true, |
|
875 |
mv.visitAnnotation(readUTF8(w, c), j != 0)); |
|
876 |
} |
|
877 |
} |
|
878 |
} |
|
879 |
} |
|
880 |
if (ANNOTATIONS && mpanns != 0) { |
|
881 |
readParameterAnnotations(mpanns, desc, c, true, mv); |
|
882 |
} |
|
883 |
if (ANNOTATIONS && impanns != 0) { |
|
884 |
readParameterAnnotations(impanns, desc, c, false, mv); |
|
885 |
} |
|
886 |
while (cattrs != null) { |
|
887 |
attr = cattrs.next; |
|
888 |
cattrs.next = null; |
|
889 |
mv.visitAttribute(cattrs); |
|
890 |
cattrs = attr; |
|
891 |
} |
|
892 |
} |
|
893 |
||
894 |
if (mv != null && v != 0) { |
|
895 |
int maxStack = readUnsignedShort(v); |
|
896 |
int maxLocals = readUnsignedShort(v + 2); |
|
897 |
int codeLength = readInt(v + 4); |
|
898 |
v += 8; |
|
899 |
||
900 |
int codeStart = v; |
|
901 |
int codeEnd = v + codeLength; |
|
902 |
||
903 |
mv.visitCode(); |
|
904 |
||
905 |
// 1st phase: finds the labels |
|
906 |
int label; |
|
907 |
Label[] labels = new Label[codeLength + 2]; |
|
908 |
readLabel(codeLength + 1, labels); |
|
909 |
while (v < codeEnd) { |
|
910 |
w = v - codeStart; |
|
911 |
int opcode = b[v] & 0xFF; |
|
912 |
switch (ClassWriter.TYPE[opcode]) { |
|
913 |
case ClassWriter.NOARG_INSN: |
|
914 |
case ClassWriter.IMPLVAR_INSN: |
|
915 |
v += 1; |
|
916 |
break; |
|
917 |
case ClassWriter.LABEL_INSN: |
|
918 |
readLabel(w + readShort(v + 1), labels); |
|
919 |
v += 3; |
|
920 |
break; |
|
921 |
case ClassWriter.LABELW_INSN: |
|
922 |
readLabel(w + readInt(v + 1), labels); |
|
923 |
v += 5; |
|
924 |
break; |
|
925 |
case ClassWriter.WIDE_INSN: |
|
926 |
opcode = b[v + 1] & 0xFF; |
|
927 |
if (opcode == Opcodes.IINC) { |
|
928 |
v += 6; |
|
929 |
} else { |
|
930 |
v += 4; |
|
931 |
} |
|
932 |
break; |
|
933 |
case ClassWriter.TABL_INSN: |
|
934 |
// skips 0 to 3 padding bytes* |
|
935 |
v = v + 4 - (w & 3); |
|
936 |
// reads instruction |
|
937 |
readLabel(w + readInt(v), labels); |
|
938 |
j = readInt(v + 8) - readInt(v + 4) + 1; |
|
939 |
v += 12; |
|
940 |
for (; j > 0; --j) { |
|
941 |
readLabel(w + readInt(v), labels); |
|
942 |
v += 4; |
|
943 |
} |
|
944 |
break; |
|
945 |
case ClassWriter.LOOK_INSN: |
|
946 |
// skips 0 to 3 padding bytes* |
|
947 |
v = v + 4 - (w & 3); |
|
948 |
// reads instruction |
|
949 |
readLabel(w + readInt(v), labels); |
|
950 |
j = readInt(v + 4); |
|
951 |
v += 8; |
|
952 |
for (; j > 0; --j) { |
|
953 |
readLabel(w + readInt(v + 4), labels); |
|
954 |
v += 8; |
|
955 |
} |
|
956 |
break; |
|
957 |
case ClassWriter.VAR_INSN: |
|
958 |
case ClassWriter.SBYTE_INSN: |
|
959 |
case ClassWriter.LDC_INSN: |
|
960 |
v += 2; |
|
961 |
break; |
|
962 |
case ClassWriter.SHORT_INSN: |
|
963 |
case ClassWriter.LDCW_INSN: |
|
964 |
case ClassWriter.FIELDORMETH_INSN: |
|
965 |
case ClassWriter.TYPE_INSN: |
|
966 |
case ClassWriter.IINC_INSN: |
|
967 |
v += 3; |
|
968 |
break; |
|
969 |
case ClassWriter.ITFMETH_INSN: |
|
970 |
v += 5; |
|
971 |
break; |
|
972 |
// case MANA_INSN: |
|
973 |
default: |
|
974 |
v += 4; |
|
975 |
break; |
|
976 |
} |
|
977 |
} |
|
978 |
// parses the try catch entries |
|
979 |
j = readUnsignedShort(v); |
|
980 |
v += 2; |
|
981 |
for (; j > 0; --j) { |
|
982 |
Label start = readLabel(readUnsignedShort(v), labels); |
|
983 |
Label end = readLabel(readUnsignedShort(v + 2), labels); |
|
984 |
Label handler = readLabel(readUnsignedShort(v + 4), labels); |
|
985 |
int type = readUnsignedShort(v + 6); |
|
986 |
if (type == 0) { |
|
987 |
mv.visitTryCatchBlock(start, end, handler, null); |
|
988 |
} else { |
|
989 |
mv.visitTryCatchBlock(start, |
|
990 |
end, |
|
991 |
handler, |
|
992 |
readUTF8(items[type], c)); |
|
993 |
} |
|
994 |
v += 8; |
|
995 |
} |
|
996 |
// parses the local variable, line number tables, and code |
|
997 |
// attributes |
|
998 |
int varTable = 0; |
|
999 |
int varTypeTable = 0; |
|
1000 |
int stackMap = 0; |
|
1001 |
int frameCount = 0; |
|
1002 |
int frameMode = 0; |
|
1003 |
int frameOffset = 0; |
|
1004 |
int frameLocalCount = 0; |
|
1005 |
int frameLocalDiff = 0; |
|
1006 |
int frameStackCount = 0; |
|
1007 |
Object[] frameLocal = null; |
|
1008 |
Object[] frameStack = null; |
|
1009 |
boolean zip = true; |
|
1010 |
cattrs = null; |
|
1011 |
j = readUnsignedShort(v); |
|
1012 |
v += 2; |
|
1013 |
for (; j > 0; --j) { |
|
1014 |
attrName = readUTF8(v, c); |
|
1015 |
if ("LocalVariableTable".equals(attrName)) { |
|
1016 |
if (!skipDebug) { |
|
1017 |
varTable = v + 6; |
|
1018 |
k = readUnsignedShort(v + 6); |
|
1019 |
w = v + 8; |
|
1020 |
for (; k > 0; --k) { |
|
1021 |
label = readUnsignedShort(w); |
|
1022 |
if (labels[label] == null) { |
|
1023 |
readLabel(label, labels).status |= Label.DEBUG; |
|
1024 |
} |
|
1025 |
label += readUnsignedShort(w + 2); |
|
1026 |
if (labels[label] == null) { |
|
1027 |
readLabel(label, labels).status |= Label.DEBUG; |
|
1028 |
} |
|
1029 |
w += 10; |
|
1030 |
} |
|
1031 |
} |
|
1032 |
} else if ("LocalVariableTypeTable".equals(attrName)) { |
|
1033 |
varTypeTable = v + 6; |
|
1034 |
} else if ("LineNumberTable".equals(attrName)) { |
|
1035 |
if (!skipDebug) { |
|
1036 |
k = readUnsignedShort(v + 6); |
|
1037 |
w = v + 8; |
|
1038 |
for (; k > 0; --k) { |
|
1039 |
label = readUnsignedShort(w); |
|
1040 |
if (labels[label] == null) { |
|
1041 |
readLabel(label, labels).status |= Label.DEBUG; |
|
1042 |
} |
|
1043 |
labels[label].line = readUnsignedShort(w + 2); |
|
1044 |
w += 4; |
|
1045 |
} |
|
1046 |
} |
|
1047 |
} else if (FRAMES && "StackMapTable".equals(attrName)) { |
|
1048 |
if ((flags & SKIP_FRAMES) == 0) { |
|
1049 |
stackMap = v + 8; |
|
1050 |
frameCount = readUnsignedShort(v + 6); |
|
1051 |
} |
|
1052 |
/* |
|
1053 |
* here we do not extract the labels corresponding to |
|
1054 |
* the attribute content. This would require a full |
|
1055 |
* parsing of the attribute, which would need to be |
|
1056 |
* repeated in the second phase (see below). Instead the |
|
1057 |
* content of the attribute is read one frame at a time |
|
1058 |
* (i.e. after a frame has been visited, the next frame |
|
1059 |
* is read), and the labels it contains are also |
|
1060 |
* extracted one frame at a time. Thanks to the ordering |
|
1061 |
* of frames, having only a "one frame lookahead" is not |
|
1062 |
* a problem, i.e. it is not possible to see an offset |
|
1063 |
* smaller than the offset of the current insn and for |
|
1064 |
* which no Label exist. |
|
1065 |
*/ |
|
1066 |
// TODO true for frame offsets, |
|
1067 |
// but for UNINITIALIZED type offsets? |
|
1068 |
} else if (FRAMES && "StackMap".equals(attrName)) { |
|
1069 |
if ((flags & SKIP_FRAMES) == 0) { |
|
1070 |
stackMap = v + 8; |
|
1071 |
frameCount = readUnsignedShort(v + 6); |
|
1072 |
zip = false; |
|
1073 |
} |
|
1074 |
/* |
|
1075 |
* IMPORTANT! here we assume that the frames are |
|
1076 |
* ordered, as in the StackMapTable attribute, although |
|
1077 |
* this is not guaranteed by the attribute format. |
|
1078 |
*/ |
|
1079 |
} else { |
|
1080 |
for (k = 0; k < attrs.length; ++k) { |
|
1081 |
if (attrs[k].type.equals(attrName)) { |
|
1082 |
attr = attrs[k].read(this, |
|
1083 |
v + 6, |
|
1084 |
readInt(v + 2), |
|
1085 |
c, |
|
1086 |
codeStart - 8, |
|
1087 |
labels); |
|
1088 |
if (attr != null) { |
|
1089 |
attr.next = cattrs; |
|
1090 |
cattrs = attr; |
|
1091 |
} |
|
1092 |
} |
|
1093 |
} |
|
1094 |
} |
|
1095 |
v += 6 + readInt(v + 2); |
|
1096 |
} |
|
1097 |
||
1098 |
// 2nd phase: visits each instruction |
|
1099 |
if (FRAMES && stackMap != 0) { |
|
1100 |
// creates the very first (implicit) frame from the method |
|
1101 |
// descriptor |
|
1102 |
frameLocal = new Object[maxLocals]; |
|
1103 |
frameStack = new Object[maxStack]; |
|
1104 |
if (unzip) { |
|
1105 |
int local = 0; |
|
1106 |
if ((access & Opcodes.ACC_STATIC) == 0) { |
|
1107 |
if ("<init>".equals(name)) { |
|
1108 |
frameLocal[local++] = Opcodes.UNINITIALIZED_THIS; |
|
1109 |
} else { |
|
1110 |
frameLocal[local++] = readClass(header + 2, c); |
|
1111 |
} |
|
1112 |
} |
|
1113 |
j = 1; |
|
1114 |
loop: while (true) { |
|
1115 |
k = j; |
|
1116 |
switch (desc.charAt(j++)) { |
|
1117 |
case 'Z': |
|
1118 |
case 'C': |
|
1119 |
case 'B': |
|
1120 |
case 'S': |
|
1121 |
case 'I': |
|
1122 |
frameLocal[local++] = Opcodes.INTEGER; |
|
1123 |
break; |
|
1124 |
case 'F': |
|
1125 |
frameLocal[local++] = Opcodes.FLOAT; |
|
1126 |
break; |
|
1127 |
case 'J': |
|
1128 |
frameLocal[local++] = Opcodes.LONG; |
|
1129 |
break; |
|
1130 |
case 'D': |
|
1131 |
frameLocal[local++] = Opcodes.DOUBLE; |
|
1132 |
break; |
|
1133 |
case '[': |
|
1134 |
while (desc.charAt(j) == '[') { |
|
1135 |
++j; |
|
1136 |
} |
|
1137 |
if (desc.charAt(j) == 'L') { |
|
1138 |
++j; |
|
1139 |
while (desc.charAt(j) != ';') { |
|
1140 |
++j; |
|
1141 |
} |
|
1142 |
} |
|
1143 |
frameLocal[local++] = desc.substring(k, ++j); |
|
1144 |
break; |
|
1145 |
case 'L': |
|
1146 |
while (desc.charAt(j) != ';') { |
|
1147 |
++j; |
|
1148 |
} |
|
1149 |
frameLocal[local++] = desc.substring(k + 1, |
|
1150 |
j++); |
|
1151 |
break; |
|
1152 |
default: |
|
1153 |
break loop; |
|
1154 |
} |
|
1155 |
} |
|
1156 |
frameLocalCount = local; |
|
1157 |
} |
|
1158 |
/* |
|
1159 |
* for the first explicit frame the offset is not |
|
1160 |
* offset_delta + 1 but only offset_delta; setting the |
|
1161 |
* implicit frame offset to -1 allow the use of the |
|
1162 |
* "offset_delta + 1" rule in all cases |
|
1163 |
*/ |
|
1164 |
frameOffset = -1; |
|
1165 |
} |
|
1166 |
v = codeStart; |
|
1167 |
Label l; |
|
1168 |
while (v < codeEnd) { |
|
1169 |
w = v - codeStart; |
|
1170 |
||
1171 |
l = labels[w]; |
|
1172 |
if (l != null) { |
|
1173 |
mv.visitLabel(l); |
|
1174 |
if (!skipDebug && l.line > 0) { |
|
1175 |
mv.visitLineNumber(l.line, l); |
|
1176 |
} |
|
1177 |
} |
|
1178 |
||
1179 |
while (FRAMES && frameLocal != null |
|
1180 |
&& (frameOffset == w || frameOffset == -1)) |
|
1181 |
{ |
|
1182 |
// if there is a frame for this offset, |
|
1183 |
// makes the visitor visit it, |
|
1184 |
// and reads the next frame if there is one. |
|
1185 |
if (!zip || unzip) { |
|
1186 |
mv.visitFrame(Opcodes.F_NEW, |
|
1187 |
frameLocalCount, |
|
1188 |
frameLocal, |
|
1189 |
frameStackCount, |
|
1190 |
frameStack); |
|
1191 |
} else if (frameOffset != -1) { |
|
1192 |
mv.visitFrame(frameMode, |
|
1193 |
frameLocalDiff, |
|
1194 |
frameLocal, |
|
1195 |
frameStackCount, |
|
1196 |
frameStack); |
|
1197 |
} |
|
1198 |
||
1199 |
if (frameCount > 0) { |
|
1200 |
int tag, delta, n; |
|
1201 |
if (zip) { |
|
1202 |
tag = b[stackMap++] & 0xFF; |
|
1203 |
} else { |
|
1204 |
tag = MethodWriter.FULL_FRAME; |
|
1205 |
frameOffset = -1; |
|
1206 |
} |
|
1207 |
frameLocalDiff = 0; |
|
1208 |
if (tag < MethodWriter.SAME_LOCALS_1_STACK_ITEM_FRAME) |
|
1209 |
{ |
|
1210 |
delta = tag; |
|
1211 |
frameMode = Opcodes.F_SAME; |
|
1212 |
frameStackCount = 0; |
|
1213 |
} else if (tag < MethodWriter.RESERVED) { |
|
1214 |
delta = tag |
|
1215 |
- MethodWriter.SAME_LOCALS_1_STACK_ITEM_FRAME; |
|
1216 |
stackMap = readFrameType(frameStack, |
|
1217 |
0, |
|
1218 |
stackMap, |
|
1219 |
c, |
|
1220 |
labels); |
|
1221 |
frameMode = Opcodes.F_SAME1; |
|
1222 |
frameStackCount = 1; |
|
1223 |
} else { |
|
1224 |
delta = readUnsignedShort(stackMap); |
|
1225 |
stackMap += 2; |
|
1226 |
if (tag == MethodWriter.SAME_LOCALS_1_STACK_ITEM_FRAME_EXTENDED) |
|
1227 |
{ |
|
1228 |
stackMap = readFrameType(frameStack, |
|
1229 |
0, |
|
1230 |
stackMap, |
|
1231 |
c, |
|
1232 |
labels); |
|
1233 |
frameMode = Opcodes.F_SAME1; |
|
1234 |
frameStackCount = 1; |
|
1235 |
} else if (tag >= MethodWriter.CHOP_FRAME |
|
1236 |
&& tag < MethodWriter.SAME_FRAME_EXTENDED) |
|
1237 |
{ |
|
1238 |
frameMode = Opcodes.F_CHOP; |
|
1239 |
frameLocalDiff = MethodWriter.SAME_FRAME_EXTENDED |
|
1240 |
- tag; |
|
1241 |
frameLocalCount -= frameLocalDiff; |
|
1242 |
frameStackCount = 0; |
|
1243 |
} else if (tag == MethodWriter.SAME_FRAME_EXTENDED) |
|
1244 |
{ |
|
1245 |
frameMode = Opcodes.F_SAME; |
|
1246 |
frameStackCount = 0; |
|
1247 |
} else if (tag < MethodWriter.FULL_FRAME) { |
|
1248 |
j = unzip ? frameLocalCount : 0; |
|
1249 |
for (k = tag |
|
1250 |
- MethodWriter.SAME_FRAME_EXTENDED; k > 0; k--) |
|
1251 |
{ |
|
1252 |
stackMap = readFrameType(frameLocal, |
|
1253 |
j++, |
|
1254 |
stackMap, |
|
1255 |
c, |
|
1256 |
labels); |
|
1257 |
} |
|
1258 |
frameMode = Opcodes.F_APPEND; |
|
1259 |
frameLocalDiff = tag |
|
1260 |
- MethodWriter.SAME_FRAME_EXTENDED; |
|
1261 |
frameLocalCount += frameLocalDiff; |
|
1262 |
frameStackCount = 0; |
|
1263 |
} else { // if (tag == FULL_FRAME) { |
|
1264 |
frameMode = Opcodes.F_FULL; |
|
1265 |
n = frameLocalDiff = frameLocalCount = readUnsignedShort(stackMap); |
|
1266 |
stackMap += 2; |
|
1267 |
for (j = 0; n > 0; n--) { |
|
1268 |
stackMap = readFrameType(frameLocal, |
|
1269 |
j++, |
|
1270 |
stackMap, |
|
1271 |
c, |
|
1272 |
labels); |
|
1273 |
} |
|
1274 |
n = frameStackCount = readUnsignedShort(stackMap); |
|
1275 |
stackMap += 2; |
|
1276 |
for (j = 0; n > 0; n--) { |
|
1277 |
stackMap = readFrameType(frameStack, |
|
1278 |
j++, |
|
1279 |
stackMap, |
|
1280 |
c, |
|
1281 |
labels); |
|
1282 |
} |
|
1283 |
} |
|
1284 |
} |
|
1285 |
frameOffset += delta + 1; |
|
1286 |
readLabel(frameOffset, labels); |
|
1287 |
||
1288 |
--frameCount; |
|
1289 |
} else { |
|
1290 |
frameLocal = null; |
|
1291 |
} |
|
1292 |
} |
|
1293 |
||
1294 |
int opcode = b[v] & 0xFF; |
|
1295 |
switch (ClassWriter.TYPE[opcode]) { |
|
1296 |
case ClassWriter.NOARG_INSN: |
|
1297 |
mv.visitInsn(opcode); |
|
1298 |
v += 1; |
|
1299 |
break; |
|
1300 |
case ClassWriter.IMPLVAR_INSN: |
|
1301 |
if (opcode > Opcodes.ISTORE) { |
|
1302 |
opcode -= 59; // ISTORE_0 |
|
1303 |
mv.visitVarInsn(Opcodes.ISTORE + (opcode >> 2), |
|
1304 |
opcode & 0x3); |
|
1305 |
} else { |
|
1306 |
opcode -= 26; // ILOAD_0 |
|
1307 |
mv.visitVarInsn(Opcodes.ILOAD + (opcode >> 2), |
|
1308 |
opcode & 0x3); |
|
1309 |
} |
|
1310 |
v += 1; |
|
1311 |
break; |
|
1312 |
case ClassWriter.LABEL_INSN: |
|
1313 |
mv.visitJumpInsn(opcode, labels[w |
|
1314 |
+ readShort(v + 1)]); |
|
1315 |
v += 3; |
|
1316 |
break; |
|
1317 |
case ClassWriter.LABELW_INSN: |
|
1318 |
mv.visitJumpInsn(opcode - 33, labels[w |
|
1319 |
+ readInt(v + 1)]); |
|
1320 |
v += 5; |
|
1321 |
break; |
|
1322 |
case ClassWriter.WIDE_INSN: |
|
1323 |
opcode = b[v + 1] & 0xFF; |
|
1324 |
if (opcode == Opcodes.IINC) { |
|
1325 |
mv.visitIincInsn(readUnsignedShort(v + 2), |
|
1326 |
readShort(v + 4)); |
|
1327 |
v += 6; |
|
1328 |
} else { |
|
1329 |
mv.visitVarInsn(opcode, |
|
1330 |
readUnsignedShort(v + 2)); |
|
1331 |
v += 4; |
|
1332 |
} |
|
1333 |
break; |
|
1334 |
case ClassWriter.TABL_INSN: |
|
1335 |
// skips 0 to 3 padding bytes |
|
1336 |
v = v + 4 - (w & 3); |
|
1337 |
// reads instruction |
|
1338 |
label = w + readInt(v); |
|
1339 |
int min = readInt(v + 4); |
|
1340 |
int max = readInt(v + 8); |
|
1341 |
v += 12; |
|
1342 |
Label[] table = new Label[max - min + 1]; |
|
1343 |
for (j = 0; j < table.length; ++j) { |
|
1344 |
table[j] = labels[w + readInt(v)]; |
|
1345 |
v += 4; |
|
1346 |
} |
|
1347 |
mv.visitTableSwitchInsn(min, |
|
1348 |
max, |
|
1349 |
labels[label], |
|
1350 |
table); |
|
1351 |
break; |
|
1352 |
case ClassWriter.LOOK_INSN: |
|
1353 |
// skips 0 to 3 padding bytes |
|
1354 |
v = v + 4 - (w & 3); |
|
1355 |
// reads instruction |
|
1356 |
label = w + readInt(v); |
|
1357 |
j = readInt(v + 4); |
|
1358 |
v += 8; |
|
1359 |
int[] keys = new int[j]; |
|
1360 |
Label[] values = new Label[j]; |
|
1361 |
for (j = 0; j < keys.length; ++j) { |
|
1362 |
keys[j] = readInt(v); |
|
1363 |
values[j] = labels[w + readInt(v + 4)]; |
|
1364 |
v += 8; |
|
1365 |
} |
|
1366 |
mv.visitLookupSwitchInsn(labels[label], |
|
1367 |
keys, |
|
1368 |
values); |
|
1369 |
break; |
|
1370 |
case ClassWriter.VAR_INSN: |
|
1371 |
mv.visitVarInsn(opcode, b[v + 1] & 0xFF); |
|
1372 |
v += 2; |
|
1373 |
break; |
|
1374 |
case ClassWriter.SBYTE_INSN: |
|
1375 |
mv.visitIntInsn(opcode, b[v + 1]); |
|
1376 |
v += 2; |
|
1377 |
break; |
|
1378 |
case ClassWriter.SHORT_INSN: |
|
1379 |
mv.visitIntInsn(opcode, readShort(v + 1)); |
|
1380 |
v += 3; |
|
1381 |
break; |
|
1382 |
case ClassWriter.LDC_INSN: |
|
1383 |
mv.visitLdcInsn(readConst(b[v + 1] & 0xFF, c)); |
|
1384 |
v += 2; |
|
1385 |
break; |
|
1386 |
case ClassWriter.LDCW_INSN: |
|
1387 |
mv.visitLdcInsn(readConst(readUnsignedShort(v + 1), |
|
1388 |
c)); |
|
1389 |
v += 3; |
|
1390 |
break; |
|
1391 |
case ClassWriter.FIELDORMETH_INSN: |
|
1392 |
case ClassWriter.ITFMETH_INSN: |
|
1393 |
int cpIndex = items[readUnsignedShort(v + 1)]; |
|
1394 |
String iowner = readClass(cpIndex, c); |
|
1395 |
cpIndex = items[readUnsignedShort(cpIndex + 2)]; |
|
1396 |
String iname = readUTF8(cpIndex, c); |
|
1397 |
String idesc = readUTF8(cpIndex + 2, c); |
|
1398 |
if (opcode < Opcodes.INVOKEVIRTUAL) { |
|
1399 |
mv.visitFieldInsn(opcode, iowner, iname, idesc); |
|
1400 |
} else { |
|
1401 |
mv.visitMethodInsn(opcode, iowner, iname, idesc); |
|
1402 |
} |
|
1403 |
if (opcode == Opcodes.INVOKEINTERFACE) { |
|
1404 |
v += 5; |
|
1405 |
} else { |
|
1406 |
v += 3; |
|
1407 |
} |
|
1408 |
break; |
|
1409 |
case ClassWriter.TYPE_INSN: |
|
1410 |
mv.visitTypeInsn(opcode, readClass(v + 1, c)); |
|
1411 |
v += 3; |
|
1412 |
break; |
|
1413 |
case ClassWriter.IINC_INSN: |
|
1414 |
mv.visitIincInsn(b[v + 1] & 0xFF, b[v + 2]); |
|
1415 |
v += 3; |
|
1416 |
break; |
|
1417 |
// case MANA_INSN: |
|
1418 |
default: |
|
1419 |
mv.visitMultiANewArrayInsn(readClass(v + 1, c), |
|
1420 |
b[v + 3] & 0xFF); |
|
1421 |
v += 4; |
|
1422 |
break; |
|
1423 |
} |
|
1424 |
} |
|
1425 |
l = labels[codeEnd - codeStart]; |
|
1426 |
if (l != null) { |
|
1427 |
mv.visitLabel(l); |
|
1428 |
} |
|
1429 |
// visits the local variable tables |
|
1430 |
if (!skipDebug && varTable != 0) { |
|
1431 |
int[] typeTable = null; |
|
1432 |
if (varTypeTable != 0) { |
|
1433 |
k = readUnsignedShort(varTypeTable) * 3; |
|
1434 |
w = varTypeTable + 2; |
|
1435 |
typeTable = new int[k]; |
|
1436 |
while (k > 0) { |
|
1437 |
typeTable[--k] = w + 6; // signature |
|
1438 |
typeTable[--k] = readUnsignedShort(w + 8); // index |
|
1439 |
typeTable[--k] = readUnsignedShort(w); // start |
|
1440 |
w += 10; |
|
1441 |
} |
|
1442 |
} |
|
1443 |
k = readUnsignedShort(varTable); |
|
1444 |
w = varTable + 2; |
|
1445 |
for (; k > 0; --k) { |
|
1446 |
int start = readUnsignedShort(w); |
|
1447 |
int length = readUnsignedShort(w + 2); |
|
1448 |
int index = readUnsignedShort(w + 8); |
|
1449 |
String vsignature = null; |
|
1450 |
if (typeTable != null) { |
|
1451 |
for (int a = 0; a < typeTable.length; a += 3) { |
|
1452 |
if (typeTable[a] == start |
|
1453 |
&& typeTable[a + 1] == index) |
|
1454 |
{ |
|
1455 |
vsignature = readUTF8(typeTable[a + 2], c); |
|
1456 |
break; |
|
1457 |
} |
|
1458 |
} |
|
1459 |
} |
|
1460 |
mv.visitLocalVariable(readUTF8(w + 4, c), |
|
1461 |
readUTF8(w + 6, c), |
|
1462 |
vsignature, |
|
1463 |
labels[start], |
|
1464 |
labels[start + length], |
|
1465 |
index); |
|
1466 |
w += 10; |
|
1467 |
} |
|
1468 |
} |
|
1469 |
// visits the other attributes |
|
1470 |
while (cattrs != null) { |
|
1471 |
attr = cattrs.next; |
|
1472 |
cattrs.next = null; |
|
1473 |
mv.visitAttribute(cattrs); |
|
1474 |
cattrs = attr; |
|
1475 |
} |
|
1476 |
// visits the max stack and max locals values |
|
1477 |
mv.visitMaxs(maxStack, maxLocals); |
|
1478 |
} |
|
1479 |
||
1480 |
if (mv != null) { |
|
1481 |
mv.visitEnd(); |
|
1482 |
} |
|
1483 |
} |
|
1484 |
||
1485 |
// visits the end of the class |
|
1486 |
classVisitor.visitEnd(); |
|
1487 |
} |
|
1488 |
||
1489 |
/** |
|
1490 |
* Reads parameter annotations and makes the given visitor visit them. |
|
1491 |
* |
|
1492 |
* @param v start offset in {@link #b b} of the annotations to be read. |
|
1493 |
* @param desc the method descriptor. |
|
1494 |
* @param buf buffer to be used to call {@link #readUTF8 readUTF8}, |
|
1495 |
* {@link #readClass(int,char[]) readClass} or |
|
1496 |
* {@link #readConst readConst}. |
|
1497 |
* @param visible <tt>true</tt> if the annotations to be read are visible |
|
1498 |
* at runtime. |
|
1499 |
* @param mv the visitor that must visit the annotations. |
|
1500 |
*/ |
|
1501 |
private void readParameterAnnotations( |
|
1502 |
int v, |
|
1503 |
final String desc, |
|
1504 |
final char[] buf, |
|
1505 |
final boolean visible, |
|
1506 |
final MethodVisitor mv) |
|
1507 |
{ |
|
1508 |
int i; |
|
1509 |
int n = b[v++] & 0xFF; |
|
1510 |
// workaround for a bug in javac (javac compiler generates a parameter |
|
1511 |
// annotation array whose size is equal to the number of parameters in |
|
1512 |
// the Java source file, while it should generate an array whose size is |
|
1513 |
// equal to the number of parameters in the method descriptor - which |
|
1514 |
// includes the synthetic parameters added by the compiler). This work- |
|
1515 |
// around supposes that the synthetic parameters are the first ones. |
|
1516 |
int synthetics = Type.getArgumentTypes(desc).length - n; |
|
1517 |
AnnotationVisitor av; |
|
1518 |
for (i = 0; i < synthetics; ++i) { |
|
1519 |
// virtual annotation to detect synthetic parameters in MethodWriter |
|
1520 |
av = mv.visitParameterAnnotation(i, "Ljava/lang/Synthetic;", false); |
|
1521 |
if (av != null) { |
|
1522 |
av.visitEnd(); |
|
1523 |
} |
|
1524 |
} |
|
1525 |
for (; i < n + synthetics; ++i) { |
|
1526 |
int j = readUnsignedShort(v); |
|
1527 |
v += 2; |
|
1528 |
for (; j > 0; --j) { |
|
1529 |
av = mv.visitParameterAnnotation(i, readUTF8(v, buf), visible); |
|
1530 |
v = readAnnotationValues(v + 2, buf, true, av); |
|
1531 |
} |
|
1532 |
} |
|
1533 |
} |
|
1534 |
||
1535 |
/** |
|
1536 |
* Reads the values of an annotation and makes the given visitor visit them. |
|
1537 |
* |
|
1538 |
* @param v the start offset in {@link #b b} of the values to be read |
|
1539 |
* (including the unsigned short that gives the number of values). |
|
1540 |
* @param buf buffer to be used to call {@link #readUTF8 readUTF8}, |
|
1541 |
* {@link #readClass(int,char[]) readClass} or |
|
1542 |
* {@link #readConst readConst}. |
|
1543 |
* @param named if the annotation values are named or not. |
|
1544 |
* @param av the visitor that must visit the values. |
|
1545 |
* @return the end offset of the annotation values. |
|
1546 |
*/ |
|
1547 |
private int readAnnotationValues( |
|
1548 |
int v, |
|
1549 |
final char[] buf, |
|
1550 |
final boolean named, |
|
1551 |
final AnnotationVisitor av) |
|
1552 |
{ |
|
1553 |
int i = readUnsignedShort(v); |
|
1554 |
v += 2; |
|
1555 |
if (named) { |
|
1556 |
for (; i > 0; --i) { |
|
1557 |
v = readAnnotationValue(v + 2, buf, readUTF8(v, buf), av); |
|
1558 |
} |
|
1559 |
} else { |
|
1560 |
for (; i > 0; --i) { |
|
1561 |
v = readAnnotationValue(v, buf, null, av); |
|
1562 |
} |
|
1563 |
} |
|
1564 |
if (av != null) { |
|
1565 |
av.visitEnd(); |
|
1566 |
} |
|
1567 |
return v; |
|
1568 |
} |
|
1569 |
||
1570 |
/** |
|
1571 |
* Reads a value of an annotation and makes the given visitor visit it. |
|
1572 |
* |
|
1573 |
* @param v the start offset in {@link #b b} of the value to be read (<i>not |
|
1574 |
* including the value name constant pool index</i>). |
|
1575 |
* @param buf buffer to be used to call {@link #readUTF8 readUTF8}, |
|
1576 |
* {@link #readClass(int,char[]) readClass} or |
|
1577 |
* {@link #readConst readConst}. |
|
1578 |
* @param name the name of the value to be read. |
|
1579 |
* @param av the visitor that must visit the value. |
|
1580 |
* @return the end offset of the annotation value. |
|
1581 |
*/ |
|
1582 |
private int readAnnotationValue( |
|
1583 |
int v, |
|
1584 |
final char[] buf, |
|
1585 |
final String name, |
|
1586 |
final AnnotationVisitor av) |
|
1587 |
{ |
|
1588 |
int i; |
|
1589 |
if (av == null) { |
|
1590 |
switch (b[v] & 0xFF) { |
|
1591 |
case 'e': // enum_const_value |
|
1592 |
return v + 5; |
|
1593 |
case '@': // annotation_value |
|
1594 |
return readAnnotationValues(v + 3, buf, true, null); |
|
1595 |
case '[': // array_value |
|
1596 |
return readAnnotationValues(v + 1, buf, false, null); |
|
1597 |
default: |
|
1598 |
return v + 3; |
|
1599 |
} |
|
1600 |
} |
|
1601 |
switch (b[v++] & 0xFF) { |
|
1602 |
case 'I': // pointer to CONSTANT_Integer |
|
1603 |
case 'J': // pointer to CONSTANT_Long |
|
1604 |
case 'F': // pointer to CONSTANT_Float |
|
1605 |
case 'D': // pointer to CONSTANT_Double |
|
1606 |
av.visit(name, readConst(readUnsignedShort(v), buf)); |
|
1607 |
v += 2; |
|
1608 |
break; |
|
1609 |
case 'B': // pointer to CONSTANT_Byte |
|
1610 |
av.visit(name, |
|
1611 |
new Byte((byte) readInt(items[readUnsignedShort(v)]))); |
|
1612 |
v += 2; |
|
1613 |
break; |
|
1614 |
case 'Z': // pointer to CONSTANT_Boolean |
|
1615 |
av.visit(name, readInt(items[readUnsignedShort(v)]) == 0 |
|
1616 |
? Boolean.FALSE |
|
1617 |
: Boolean.TRUE); |
|
1618 |
v += 2; |
|
1619 |
break; |
|
1620 |
case 'S': // pointer to CONSTANT_Short |
|
1621 |
av.visit(name, |
|
1622 |
new Short((short) readInt(items[readUnsignedShort(v)]))); |
|
1623 |
v += 2; |
|
1624 |
break; |
|
1625 |
case 'C': // pointer to CONSTANT_Char |
|
1626 |
av.visit(name, |
|
1627 |
new Character((char) readInt(items[readUnsignedShort(v)]))); |
|
1628 |
v += 2; |
|
1629 |
break; |
|
1630 |
case 's': // pointer to CONSTANT_Utf8 |
|
1631 |
av.visit(name, readUTF8(v, buf)); |
|
1632 |
v += 2; |
|
1633 |
break; |
|
1634 |
case 'e': // enum_const_value |
|
1635 |
av.visitEnum(name, readUTF8(v, buf), readUTF8(v + 2, buf)); |
|
1636 |
v += 4; |
|
1637 |
break; |
|
1638 |
case 'c': // class_info |
|
1639 |
av.visit(name, Type.getType(readUTF8(v, buf))); |
|
1640 |
v += 2; |
|
1641 |
break; |
|
1642 |
case '@': // annotation_value |
|
1643 |
v = readAnnotationValues(v + 2, |
|
1644 |
buf, |
|
1645 |
true, |
|
1646 |
av.visitAnnotation(name, readUTF8(v, buf))); |
|
1647 |
break; |
|
1648 |
case '[': // array_value |
|
1649 |
int size = readUnsignedShort(v); |
|
1650 |
v += 2; |
|
1651 |
if (size == 0) { |
|
1652 |
return readAnnotationValues(v - 2, |
|
1653 |
buf, |
|
1654 |
false, |
|
1655 |
av.visitArray(name)); |
|
1656 |
} |
|
1657 |
switch (this.b[v++] & 0xFF) { |
|
1658 |
case 'B': |
|
1659 |
byte[] bv = new byte[size]; |
|
1660 |
for (i = 0; i < size; i++) { |
|
1661 |
bv[i] = (byte) readInt(items[readUnsignedShort(v)]); |
|
1662 |
v += 3; |
|
1663 |
} |
|
1664 |
av.visit(name, bv); |
|
1665 |
--v; |
|
1666 |
break; |
|
1667 |
case 'Z': |
|
1668 |
boolean[] zv = new boolean[size]; |
|
1669 |
for (i = 0; i < size; i++) { |
|
1670 |
zv[i] = readInt(items[readUnsignedShort(v)]) != 0; |
|
1671 |
v += 3; |
|
1672 |
} |
|
1673 |
av.visit(name, zv); |
|
1674 |
--v; |
|
1675 |
break; |
|
1676 |
case 'S': |
|
1677 |
short[] sv = new short[size]; |
|
1678 |
for (i = 0; i < size; i++) { |
|
1679 |
sv[i] = (short) readInt(items[readUnsignedShort(v)]); |
|
1680 |
v += 3; |
|
1681 |
} |
|
1682 |
av.visit(name, sv); |
|
1683 |
--v; |
|
1684 |
break; |
|
1685 |
case 'C': |
|
1686 |
char[] cv = new char[size]; |
|
1687 |
for (i = 0; i < size; i++) { |
|
1688 |
cv[i] = (char) readInt(items[readUnsignedShort(v)]); |
|
1689 |
v += 3; |
|
1690 |
} |
|
1691 |
av.visit(name, cv); |
|
1692 |
--v; |
|
1693 |
break; |
|
1694 |
case 'I': |
|
1695 |
int[] iv = new int[size]; |
|
1696 |
for (i = 0; i < size; i++) { |
|
1697 |
iv[i] = readInt(items[readUnsignedShort(v)]); |
|
1698 |
v += 3; |
|
1699 |
} |
|
1700 |
av.visit(name, iv); |
|
1701 |
--v; |
|
1702 |
break; |
|
1703 |
case 'J': |
|
1704 |
long[] lv = new long[size]; |
|
1705 |
for (i = 0; i < size; i++) { |
|
1706 |
lv[i] = readLong(items[readUnsignedShort(v)]); |
|
1707 |
v += 3; |
|
1708 |
} |
|
1709 |
av.visit(name, lv); |
|
1710 |
--v; |
|
1711 |
break; |
|
1712 |
case 'F': |
|
1713 |
float[] fv = new float[size]; |
|
1714 |
for (i = 0; i < size; i++) { |
|
1715 |
fv[i] = Float.intBitsToFloat(readInt(items[readUnsignedShort(v)])); |
|
1716 |
v += 3; |
|
1717 |
} |
|
1718 |
av.visit(name, fv); |
|
1719 |
--v; |
|
1720 |
break; |
|
1721 |
case 'D': |
|
1722 |
double[] dv = new double[size]; |
|
1723 |
for (i = 0; i < size; i++) { |
|
1724 |
dv[i] = Double.longBitsToDouble(readLong(items[readUnsignedShort(v)])); |
|
1725 |
v += 3; |
|
1726 |
} |
|
1727 |
av.visit(name, dv); |
|
1728 |
--v; |
|
1729 |
break; |
|
1730 |
default: |
|
1731 |
v = readAnnotationValues(v - 3, |
|
1732 |
buf, |
|
1733 |
false, |
|
1734 |
av.visitArray(name)); |
|
1735 |
} |
|
1736 |
} |
|
1737 |
return v; |
|
1738 |
} |
|
1739 |
||
1740 |
private int readFrameType( |
|
1741 |
final Object[] frame, |
|
1742 |
final int index, |
|
1743 |
int v, |
|
1744 |
final char[] buf, |
|
1745 |
final Label[] labels) |
|
1746 |
{ |
|
1747 |
int type = b[v++] & 0xFF; |
|
1748 |
switch (type) { |
|
1749 |
case 0: |
|
1750 |
frame[index] = Opcodes.TOP; |
|
1751 |
break; |
|
1752 |
case 1: |
|
1753 |
frame[index] = Opcodes.INTEGER; |
|
1754 |
break; |
|
1755 |
case 2: |
|
1756 |
frame[index] = Opcodes.FLOAT; |
|
1757 |
break; |
|
1758 |
case 3: |
|
1759 |
frame[index] = Opcodes.DOUBLE; |
|
1760 |
break; |
|
1761 |
case 4: |
|
1762 |
frame[index] = Opcodes.LONG; |
|
1763 |
break; |
|
1764 |
case 5: |
|
1765 |
frame[index] = Opcodes.NULL; |
|
1766 |
break; |
|
1767 |
case 6: |
|
1768 |
frame[index] = Opcodes.UNINITIALIZED_THIS; |
|
1769 |
break; |
|
1770 |
case 7: // Object |
|
1771 |
frame[index] = readClass(v, buf); |
|
1772 |
v += 2; |
|
1773 |
break; |
|
1774 |
default: // Uninitialized |
|
1775 |
frame[index] = readLabel(readUnsignedShort(v), labels); |
|
1776 |
v += 2; |
|
1777 |
} |
|
1778 |
return v; |
|
1779 |
} |
|
1780 |
||
1781 |
/** |
|
1782 |
* Returns the label corresponding to the given offset. The default |
|
1783 |
* implementation of this method creates a label for the given offset if it |
|
1784 |
* has not been already created. |
|
1785 |
* |
|
1786 |
* @param offset a bytecode offset in a method. |
|
1787 |
* @param labels the already created labels, indexed by their offset. If a |
|
1788 |
* label already exists for offset this method must not create a new |
|
1789 |
* one. Otherwise it must store the new label in this array. |
|
1790 |
* @return a non null Label, which must be equal to labels[offset]. |
|
1791 |
*/ |
|
1792 |
protected Label readLabel(int offset, Label[] labels) { |
|
1793 |
if (labels[offset] == null) { |
|
1794 |
labels[offset] = new Label(); |
|
1795 |
} |
|
1796 |
return labels[offset]; |
|
1797 |
} |
|
1798 |
||
1799 |
/** |
|
1800 |
* Reads an attribute in {@link #b b}. |
|
1801 |
* |
|
1802 |
* @param attrs prototypes of the attributes that must be parsed during the |
|
1803 |
* visit of the class. Any attribute whose type is not equal to the |
|
1804 |
* type of one the prototypes is ignored (i.e. an empty |
|
1805 |
* {@link Attribute} instance is returned). |
|
1806 |
* @param type the type of the attribute. |
|
1807 |
* @param off index of the first byte of the attribute's content in |
|
1808 |
* {@link #b b}. The 6 attribute header bytes, containing the type |
|
1809 |
* and the length of the attribute, are not taken into account here |
|
1810 |
* (they have already been read). |
|
1811 |
* @param len the length of the attribute's content. |
|
1812 |
* @param buf buffer to be used to call {@link #readUTF8 readUTF8}, |
|
1813 |
* {@link #readClass(int,char[]) readClass} or |
|
1814 |
* {@link #readConst readConst}. |
|
1815 |
* @param codeOff index of the first byte of code's attribute content in |
|
1816 |
* {@link #b b}, or -1 if the attribute to be read is not a code |
|
1817 |
* attribute. The 6 attribute header bytes, containing the type and |
|
1818 |
* the length of the attribute, are not taken into account here. |
|
1819 |
* @param labels the labels of the method's code, or <tt>null</tt> if the |
|
1820 |
* attribute to be read is not a code attribute. |
|
1821 |
* @return the attribute that has been read, or <tt>null</tt> to skip this |
|
1822 |
* attribute. |
|
1823 |
*/ |
|
1824 |
private Attribute readAttribute( |
|
1825 |
final Attribute[] attrs, |
|
1826 |
final String type, |
|
1827 |
final int off, |
|
1828 |
final int len, |
|
1829 |
final char[] buf, |
|
1830 |
final int codeOff, |
|
1831 |
final Label[] labels) |
|
1832 |
{ |
|
1833 |
for (int i = 0; i < attrs.length; ++i) { |
|
1834 |
if (attrs[i].type.equals(type)) { |
|
1835 |
return attrs[i].read(this, off, len, buf, codeOff, labels); |
|
1836 |
} |
|
1837 |
} |
|
1838 |
return new Attribute(type).read(this, off, len, null, -1, null); |
|
1839 |
} |
|
1840 |
||
1841 |
// ------------------------------------------------------------------------ |
|
1842 |
// Utility methods: low level parsing |
|
1843 |
// ------------------------------------------------------------------------ |
|
1844 |
||
1845 |
/** |
|
1846 |
* Returns the start index of the constant pool item in {@link #b b}, plus |
|
1847 |
* one. <i>This method is intended for {@link Attribute} sub classes, and is |
|
1848 |
* normally not needed by class generators or adapters.</i> |
|
1849 |
* |
|
1850 |
* @param item the index a constant pool item. |
|
1851 |
* @return the start index of the constant pool item in {@link #b b}, plus |
|
1852 |
* one. |
|
1853 |
*/ |
|
1854 |
public int getItem(final int item) { |
|
1855 |
return items[item]; |
|
1856 |
} |
|
1857 |
||
1858 |
/** |
|
1859 |
* Reads a byte value in {@link #b b}. <i>This method is intended for |
|
1860 |
* {@link Attribute} sub classes, and is normally not needed by class |
|
1861 |
* generators or adapters.</i> |
|
1862 |
* |
|
1863 |
* @param index the start index of the value to be read in {@link #b b}. |
|
1864 |
* @return the read value. |
|
1865 |
*/ |
|
1866 |
public int readByte(final int index) { |
|
1867 |
return b[index] & 0xFF; |
|
1868 |
} |
|
1869 |
||
1870 |
/** |
|
1871 |
* Reads an unsigned short value in {@link #b b}. <i>This method is |
|
1872 |
* intended for {@link Attribute} sub classes, and is normally not needed by |
|
1873 |
* class generators or adapters.</i> |
|
1874 |
* |
|
1875 |
* @param index the start index of the value to be read in {@link #b b}. |
|
1876 |
* @return the read value. |
|
1877 |
*/ |
|
1878 |
public int readUnsignedShort(final int index) { |
|
1879 |
byte[] b = this.b; |
|
1880 |
return ((b[index] & 0xFF) << 8) | (b[index + 1] & 0xFF); |
|
1881 |
} |
|
1882 |
||
1883 |
/** |
|
1884 |
* Reads a signed short value in {@link #b b}. <i>This method is intended |
|
1885 |
* for {@link Attribute} sub classes, and is normally not needed by class |
|
1886 |
* generators or adapters.</i> |
|
1887 |
* |
|
1888 |
* @param index the start index of the value to be read in {@link #b b}. |
|
1889 |
* @return the read value. |
|
1890 |
*/ |
|
1891 |
public short readShort(final int index) { |
|
1892 |
byte[] b = this.b; |
|
1893 |
return (short) (((b[index] & 0xFF) << 8) | (b[index + 1] & 0xFF)); |
|
1894 |
} |
|
1895 |
||
1896 |
/** |
|
1897 |
* Reads a signed int value in {@link #b b}. <i>This method is intended for |
|
1898 |
* {@link Attribute} sub classes, and is normally not needed by class |
|
1899 |
* generators or adapters.</i> |
|
1900 |
* |
|
1901 |
* @param index the start index of the value to be read in {@link #b b}. |
|
1902 |
* @return the read value. |
|
1903 |
*/ |
|
1904 |
public int readInt(final int index) { |
|
1905 |
byte[] b = this.b; |
|
1906 |
return ((b[index] & 0xFF) << 24) | ((b[index + 1] & 0xFF) << 16) |
|
1907 |
| ((b[index + 2] & 0xFF) << 8) | (b[index + 3] & 0xFF); |
|
1908 |
} |
|
1909 |
||
1910 |
/** |
|
1911 |
* Reads a signed long value in {@link #b b}. <i>This method is intended |
|
1912 |
* for {@link Attribute} sub classes, and is normally not needed by class |
|
1913 |
* generators or adapters.</i> |
|
1914 |
* |
|
1915 |
* @param index the start index of the value to be read in {@link #b b}. |
|
1916 |
* @return the read value. |
|
1917 |
*/ |
|
1918 |
public long readLong(final int index) { |
|
1919 |
long l1 = readInt(index); |
|
1920 |
long l0 = readInt(index + 4) & 0xFFFFFFFFL; |
|
1921 |
return (l1 << 32) | l0; |
|
1922 |
} |
|
1923 |
||
1924 |
/** |
|
1925 |
* Reads an UTF8 string constant pool item in {@link #b b}. <i>This method |
|
1926 |
* is intended for {@link Attribute} sub classes, and is normally not needed |
|
1927 |
* by class generators or adapters.</i> |
|
1928 |
* |
|
1929 |
* @param index the start index of an unsigned short value in {@link #b b}, |
|
1930 |
* whose value is the index of an UTF8 constant pool item. |
|
1931 |
* @param buf buffer to be used to read the item. This buffer must be |
|
1932 |
* sufficiently large. It is not automatically resized. |
|
1933 |
* @return the String corresponding to the specified UTF8 item. |
|
1934 |
*/ |
|
1935 |
public String readUTF8(int index, final char[] buf) { |
|
1936 |
int item = readUnsignedShort(index); |
|
1937 |
String s = strings[item]; |
|
1938 |
if (s != null) { |
|
1939 |
return s; |
|
1940 |
} |
|
1941 |
index = items[item]; |
|
1942 |
return strings[item] = readUTF(index + 2, readUnsignedShort(index), buf); |
|
1943 |
} |
|
1944 |
||
1945 |
/** |
|
1946 |
* Reads UTF8 string in {@link #b b}. |
|
1947 |
* |
|
1948 |
* @param index start offset of the UTF8 string to be read. |
|
1949 |
* @param utfLen length of the UTF8 string to be read. |
|
1950 |
* @param buf buffer to be used to read the string. This buffer must be |
|
1951 |
* sufficiently large. It is not automatically resized. |
|
1952 |
* @return the String corresponding to the specified UTF8 string. |
|
1953 |
*/ |
|
1954 |
private String readUTF(int index, final int utfLen, final char[] buf) { |
|
1955 |
int endIndex = index + utfLen; |
|
1956 |
byte[] b = this.b; |
|
1957 |
int strLen = 0; |
|
1958 |
int c, d, e; |
|
1959 |
while (index < endIndex) { |
|
1960 |
c = b[index++] & 0xFF; |
|
1961 |
switch (c >> 4) { |
|
1962 |
case 0: |
|
1963 |
case 1: |
|
1964 |
case 2: |
|
1965 |
case 3: |
|
1966 |
case 4: |
|
1967 |
case 5: |
|
1968 |
case 6: |
|
1969 |
case 7: |
|
1970 |
// 0xxxxxxx |
|
1971 |
buf[strLen++] = (char) c; |
|
1972 |
break; |
|
1973 |
case 12: |
|
1974 |
case 13: |
|
1975 |
// 110x xxxx 10xx xxxx |
|
1976 |
d = b[index++]; |
|
1977 |
buf[strLen++] = (char) (((c & 0x1F) << 6) | (d & 0x3F)); |
|
1978 |
break; |
|
1979 |
default: |
|
1980 |
// 1110 xxxx 10xx xxxx 10xx xxxx |
|
1981 |
d = b[index++]; |
|
1982 |
e = b[index++]; |
|
1983 |
buf[strLen++] = (char) (((c & 0x0F) << 12) |
|
1984 |
| ((d & 0x3F) << 6) | (e & 0x3F)); |
|
1985 |
break; |
|
1986 |
} |
|
1987 |
} |
|
1988 |
return new String(buf, 0, strLen); |
|
1989 |
} |
|
1990 |
||
1991 |
/** |
|
1992 |
* Reads a class constant pool item in {@link #b b}. <i>This method is |
|
1993 |
* intended for {@link Attribute} sub classes, and is normally not needed by |
|
1994 |
* class generators or adapters.</i> |
|
1995 |
* |
|
1996 |
* @param index the start index of an unsigned short value in {@link #b b}, |
|
1997 |
* whose value is the index of a class constant pool item. |
|
1998 |
* @param buf buffer to be used to read the item. This buffer must be |
|
1999 |
* sufficiently large. It is not automatically resized. |
|
2000 |
* @return the String corresponding to the specified class item. |
|
2001 |
*/ |
|
2002 |
public String readClass(final int index, final char[] buf) { |
|
2003 |
// computes the start index of the CONSTANT_Class item in b |
|
2004 |
// and reads the CONSTANT_Utf8 item designated by |
|
2005 |
// the first two bytes of this CONSTANT_Class item |
|
2006 |
return readUTF8(items[readUnsignedShort(index)], buf); |
|
2007 |
} |
|
2008 |
||
2009 |
/** |
|
2010 |
* Reads a numeric or string constant pool item in {@link #b b}. <i>This |
|
2011 |
* method is intended for {@link Attribute} sub classes, and is normally not |
|
2012 |
* needed by class generators or adapters.</i> |
|
2013 |
* |
|
2014 |
* @param item the index of a constant pool item. |
|
2015 |
* @param buf buffer to be used to read the item. This buffer must be |
|
2016 |
* sufficiently large. It is not automatically resized. |
|
2017 |
* @return the {@link Integer}, {@link Float}, {@link Long}, |
|
2018 |
* {@link Double}, {@link String} or {@link Type} corresponding to |
|
2019 |
* the given constant pool item. |
|
2020 |
*/ |
|
2021 |
public Object readConst(final int item, final char[] buf) { |
|
2022 |
int index = items[item]; |
|
2023 |
switch (b[index - 1]) { |
|
2024 |
case ClassWriter.INT: |
|
2025 |
return new Integer(readInt(index)); |
|
2026 |
case ClassWriter.FLOAT: |
|
2027 |
return new Float(Float.intBitsToFloat(readInt(index))); |
|
2028 |
case ClassWriter.LONG: |
|
2029 |
return new Long(readLong(index)); |
|
2030 |
case ClassWriter.DOUBLE: |
|
2031 |
return new Double(Double.longBitsToDouble(readLong(index))); |
|
2032 |
case ClassWriter.CLASS: |
|
2033 |
return Type.getObjectType(readUTF8(index, buf)); |
|
2034 |
// case ClassWriter.STR: |
|
2035 |
default: |
|
2036 |
return readUTF8(index, buf); |
|
2037 |
} |
|
2038 |
} |
|
2039 |
} |