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      1 /*
      2  * [The "BSD licence"]
      3  * Copyright (c) 2010 Ben Gruver (JesusFreke)
      4  * All rights reserved.
      5  *
      6  * Redistribution and use in source and binary forms, with or without
      7  * modification, are permitted provided that the following conditions
      8  * are met:
      9  * 1. Redistributions of source code must retain the above copyright
     10  *    notice, this list of conditions and the following disclaimer.
     11  * 2. Redistributions in binary form must reproduce the above copyright
     12  *    notice, this list of conditions and the following disclaimer in the
     13  *    documentation and/or other materials provided with the distribution.
     14  * 3. The name of the author may not be used to endorse or promote products
     15  *    derived from this software without specific prior written permission.
     16  *
     17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     19  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     20  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     21  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     22  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     25  * INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     27  */
     28 
     29 package org.jf.baksmali.Adaptors;
     30 
     31 import org.jf.util.IndentingWriter;
     32 import org.jf.dexlib.TypeIdItem;
     33 
     34 import java.io.IOException;
     35 
     36 public class CatchMethodItem extends MethodItem {
     37     private final TypeIdItem exceptionType;
     38 
     39     private final LabelMethodItem tryStartLabel;
     40     private final LabelMethodItem tryEndLabel;
     41     private final LabelMethodItem handlerLabel;
     42 
     43     public CatchMethodItem(MethodDefinition.LabelCache labelCache, int codeAddress, TypeIdItem exceptionType,
     44                            int startAddress, int endAddress, int handlerAddress) {
     45         super(codeAddress);
     46         this.exceptionType = exceptionType;
     47 
     48         tryStartLabel = labelCache.internLabel(new LabelMethodItem(startAddress, "try_start_"));
     49 
     50         //use the address from the last covered instruction, but make the label
     51         //name refer to the address of the next instruction
     52         tryEndLabel = labelCache.internLabel(new EndTryLabelMethodItem(codeAddress, endAddress));
     53 
     54         if (exceptionType == null) {
     55             handlerLabel = labelCache.internLabel(new LabelMethodItem(handlerAddress, "catchall_"));
     56         } else {
     57             handlerLabel = labelCache.internLabel(new LabelMethodItem(handlerAddress, "catch_"));
     58         }
     59     }
     60 
     61     public LabelMethodItem getTryStartLabel() {
     62         return tryStartLabel;
     63     }
     64 
     65     public LabelMethodItem getTryEndLabel() {
     66         return tryEndLabel;
     67     }
     68 
     69     public LabelMethodItem getHandlerLabel() {
     70         return handlerLabel;
     71     }
     72 
     73     public double getSortOrder() {
     74         //sort after instruction and end_try label
     75         return 102;
     76     }
     77 
     78     @Override
     79     public boolean writeTo(IndentingWriter writer) throws IOException {
     80         if (exceptionType == null) {
     81             writer.write(".catchall");
     82         } else {
     83             writer.write(".catch ");
     84             ReferenceFormatter.writeTypeReference(writer, exceptionType);
     85         }
     86         writer.write(" {");
     87         tryStartLabel.writeTo(writer);
     88         writer.write(" .. ");
     89         tryEndLabel.writeTo(writer);
     90         writer.write("} ");
     91         handlerLabel.writeTo(writer);
     92         return true;
     93     }
     94 }
     95