1 /*
   2  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   3  *
   4  * This code is free software; you can redistribute it and/or modify it
   5  * under the terms of the GNU General Public License version 2 only, as
   6  * published by the Free Software Foundation.  Oracle designates this
   7  * particular file as subject to the "Classpath" exception as provided
   8  * by Oracle in the LICENSE file that accompanied this code.
   9  *
  10  * This code is distributed in the hope that it will be useful, but WITHOUT
  11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  13  * version 2 for more details (a copy is included in the LICENSE file that
  14  * accompanied this code).
  15  *
  16  * You should have received a copy of the GNU General Public License version
  17  * 2 along with this work; if not, write to the Free Software Foundation,
  18  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  19  *
  20  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  21  * or visit www.oracle.com if you need additional information or have any
  22  * questions.
  23  */
  24 
  25 /*
  26  * This file is available under and governed by the GNU General Public
  27  * License version 2 only, as published by the Free Software Foundation.
  28  * However, the following notice accompanied the original version of this
  29  * file:
  30  *
  31  * ASM: a very small and fast Java bytecode manipulation framework
  32  * Copyright (c) 2000-2011 INRIA, France Telecom
  33  * All rights reserved.
  34  *
  35  * Redistribution and use in source and binary forms, with or without
  36  * modification, are permitted provided that the following conditions
  37  * are met:
  38  * 1. Redistributions of source code must retain the above copyright
  39  *    notice, this list of conditions and the following disclaimer.
  40  * 2. Redistributions in binary form must reproduce the above copyright
  41  *    notice, this list of conditions and the following disclaimer in the
  42  *    documentation and/or other materials provided with the distribution.
  43  * 3. Neither the name of the copyright holders nor the names of its
  44  *    contributors may be used to endorse or promote products derived from
  45  *    this software without specific prior written permission.
  46  *
  47  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  48  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  49  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  50  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  51  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  52  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  53  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  54  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  55  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  56  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
  57  * THE POSSIBILITY OF SUCH DAMAGE.
  58  */
  59 
  60 package jdk.internal.org.objectweb.asm.commons;
  61 
  62 import jdk.internal.org.objectweb.asm.AnnotationVisitor;
  63 import jdk.internal.org.objectweb.asm.Handle;
  64 import jdk.internal.org.objectweb.asm.Label;
  65 import jdk.internal.org.objectweb.asm.MethodVisitor;
  66 import jdk.internal.org.objectweb.asm.Opcodes;
  67 import jdk.internal.org.objectweb.asm.TypePath;
  68 
  69 /**
  70  * A {@link LocalVariablesSorter} for type mapping.
  71  *
  72  * @author Eugene Kuleshov
  73  */
  74 public class MethodRemapper extends MethodVisitor {
  75 
  76     protected final Remapper remapper;
  77 
  78     public MethodRemapper(final MethodVisitor mv, final Remapper remapper) {
  79         this(Opcodes.ASM5, mv, remapper);
  80     }
  81 
  82     protected MethodRemapper(final int api, final MethodVisitor mv,
  83             final Remapper remapper) {
  84         super(api, mv);
  85         this.remapper = remapper;
  86     }
  87 
  88     @Override
  89     public AnnotationVisitor visitAnnotationDefault() {
  90         AnnotationVisitor av = super.visitAnnotationDefault();
  91         return av == null ? av : new AnnotationRemapper(av, remapper);
  92     }
  93 
  94     @Override
  95     public AnnotationVisitor visitAnnotation(String desc, boolean visible) {
  96         AnnotationVisitor av = super.visitAnnotation(remapper.mapDesc(desc),
  97                 visible);
  98         return av == null ? av : new AnnotationRemapper(av, remapper);
  99     }
 100 
 101     @Override
 102     public AnnotationVisitor visitTypeAnnotation(int typeRef,
 103             TypePath typePath, String desc, boolean visible) {
 104         AnnotationVisitor av = super.visitTypeAnnotation(typeRef, typePath,
 105                 remapper.mapDesc(desc), visible);
 106         return av == null ? av : new AnnotationRemapper(av, remapper);
 107     }
 108 
 109     @Override
 110     public AnnotationVisitor visitParameterAnnotation(int parameter,
 111             String desc, boolean visible) {
 112         AnnotationVisitor av = super.visitParameterAnnotation(parameter,
 113                 remapper.mapDesc(desc), visible);
 114         return av == null ? av : new AnnotationRemapper(av, remapper);
 115     }
 116 
 117     @Override
 118     public void visitFrame(int type, int nLocal, Object[] local, int nStack,
 119             Object[] stack) {
 120         super.visitFrame(type, nLocal, remapEntries(nLocal, local), nStack,
 121                 remapEntries(nStack, stack));
 122     }
 123 
 124     private Object[] remapEntries(int n, Object[] entries) {
 125         for (int i = 0; i < n; i++) {
 126             if (entries[i] instanceof String) {
 127                 Object[] newEntries = new Object[n];
 128                 if (i > 0) {
 129                     System.arraycopy(entries, 0, newEntries, 0, i);
 130                 }
 131                 do {
 132                     Object t = entries[i];
 133                     newEntries[i++] = t instanceof String ? remapper
 134                             .mapType((String) t) : t;
 135                 } while (i < n);
 136                 return newEntries;
 137             }
 138         }
 139         return entries;
 140     }
 141 
 142     @Override
 143     public void visitFieldInsn(int opcode, String owner, String name,
 144             String desc) {
 145         super.visitFieldInsn(opcode, remapper.mapType(owner),
 146                 remapper.mapFieldName(owner, name, desc),
 147                 remapper.mapDesc(desc));
 148     }
 149 
 150     @Deprecated
 151     @Override
 152     public void visitMethodInsn(final int opcode, final String owner,
 153             final String name, final String desc) {
 154         if (api >= Opcodes.ASM5) {
 155             super.visitMethodInsn(opcode, owner, name, desc);
 156             return;
 157         }
 158         doVisitMethodInsn(opcode, owner, name, desc,
 159                 opcode == Opcodes.INVOKEINTERFACE);
 160     }
 161 
 162     @Override
 163     public void visitMethodInsn(final int opcode, final String owner,
 164             final String name, final String desc, final boolean itf) {
 165         if (api < Opcodes.ASM5) {
 166             super.visitMethodInsn(opcode, owner, name, desc, itf);
 167             return;
 168         }
 169         doVisitMethodInsn(opcode, owner, name, desc, itf);
 170     }
 171 
 172     private void doVisitMethodInsn(int opcode, String owner, String name,
 173             String desc, boolean itf) {
 174         // Calling super.visitMethodInsn requires to call the correct version
 175         // depending on this.api (otherwise infinite loops can occur). To
 176         // simplify and to make it easier to automatically remove the backward
 177         // compatibility code, we inline the code of the overridden method here.
 178         // IMPORTANT: THIS ASSUMES THAT visitMethodInsn IS NOT OVERRIDDEN IN
 179         // LocalVariableSorter.
 180         if (mv != null) {
 181             mv.visitMethodInsn(opcode, remapper.mapType(owner),
 182                     remapper.mapMethodName(owner, name, desc),
 183                     remapper.mapMethodDesc(desc), itf);
 184         }
 185     }
 186 
 187     @Override
 188     public void visitInvokeDynamicInsn(String name, String desc, Handle bsm,
 189             Object... bsmArgs) {
 190         for (int i = 0; i < bsmArgs.length; i++) {
 191             bsmArgs[i] = remapper.mapValue(bsmArgs[i]);
 192         }
 193         super.visitInvokeDynamicInsn(
 194                 remapper.mapInvokeDynamicMethodName(name, desc),
 195                 remapper.mapMethodDesc(desc), (Handle) remapper.mapValue(bsm),
 196                 bsmArgs);
 197     }
 198 
 199     @Override
 200     public void visitTypeInsn(int opcode, String type) {
 201         super.visitTypeInsn(opcode, remapper.mapType(type));
 202     }
 203 
 204     @Override
 205     public void visitLdcInsn(Object cst) {
 206         super.visitLdcInsn(remapper.mapValue(cst));
 207     }
 208 
 209     @Override
 210     public void visitMultiANewArrayInsn(String desc, int dims) {
 211         super.visitMultiANewArrayInsn(remapper.mapDesc(desc), dims);
 212     }
 213 
 214     @Override
 215     public AnnotationVisitor visitInsnAnnotation(int typeRef,
 216             TypePath typePath, String desc, boolean visible) {
 217         AnnotationVisitor av = super.visitInsnAnnotation(typeRef, typePath,
 218                 remapper.mapDesc(desc), visible);
 219         return av == null ? av : new AnnotationRemapper(av, remapper);
 220     }
 221 
 222     @Override
 223     public void visitTryCatchBlock(Label start, Label end, Label handler,
 224             String type) {
 225         super.visitTryCatchBlock(start, end, handler, type == null ? null
 226                 : remapper.mapType(type));
 227     }
 228 
 229     @Override
 230     public AnnotationVisitor visitTryCatchAnnotation(int typeRef,
 231             TypePath typePath, String desc, boolean visible) {
 232         AnnotationVisitor av = super.visitTryCatchAnnotation(typeRef, typePath,
 233                 remapper.mapDesc(desc), visible);
 234         return av == null ? av : new AnnotationRemapper(av, remapper);
 235     }
 236 
 237     @Override
 238     public void visitLocalVariable(String name, String desc, String signature,
 239             Label start, Label end, int index) {
 240         super.visitLocalVariable(name, remapper.mapDesc(desc),
 241                 remapper.mapSignature(signature, true), start, end, index);
 242     }
 243 
 244     @Override
 245     public AnnotationVisitor visitLocalVariableAnnotation(int typeRef,
 246             TypePath typePath, Label[] start, Label[] end, int[] index,
 247             String desc, boolean visible) {
 248         AnnotationVisitor av = super.visitLocalVariableAnnotation(typeRef,
 249                 typePath, start, end, index, remapper.mapDesc(desc), visible);
 250         return av == null ? av : new AnnotationRemapper(av, remapper);
 251     }
 252 }