Home | History | Annotate | Download | only in Adaptors 
      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.baksmali.BaksmaliOptions;
     32 import org.jf.util.IndentingWriter;
     33 
     34 import javax.annotation.Nonnull;
     35 import javax.annotation.Nullable;
     36 import java.io.IOException;
     37 
     38 public class CatchMethodItem extends MethodItem {
     39     private final String exceptionType;
     40 
     41     private final LabelMethodItem tryStartLabel;
     42     private final LabelMethodItem tryEndLabel;
     43     private final LabelMethodItem handlerLabel;
     44 
     45     public CatchMethodItem(@Nonnull BaksmaliOptions options, @Nonnull MethodDefinition.LabelCache labelCache,
     46                            int codeAddress, @Nullable String exceptionType, int startAddress, int endAddress,
     47                            int handlerAddress) {
     48         super(codeAddress);
     49         this.exceptionType = exceptionType;
     50 
     51         tryStartLabel = labelCache.internLabel(new LabelMethodItem(options, startAddress, "try_start_"));
     52 
     53         //use the address from the last covered instruction, but make the label
     54         //name refer to the address of the next instruction
     55         tryEndLabel = labelCache.internLabel(new EndTryLabelMethodItem(options, codeAddress, endAddress));
     56 
     57         if (exceptionType == null) {
     58             handlerLabel = labelCache.internLabel(new LabelMethodItem(options, handlerAddress, "catchall_"));
     59         } else {
     60             handlerLabel = labelCache.internLabel(new LabelMethodItem(options, handlerAddress, "catch_"));
     61         }
     62     }
     63 
     64     public LabelMethodItem getTryStartLabel() {
     65         return tryStartLabel;
     66     }
     67 
     68     public LabelMethodItem getTryEndLabel() {
     69         return tryEndLabel;
     70     }
     71 
     72     public LabelMethodItem getHandlerLabel() {
     73         return handlerLabel;
     74     }
     75 
     76     public double getSortOrder() {
     77         //sort after instruction and end_try label
     78         return 102;
     79     }
     80 
     81     @Override
     82     public boolean writeTo(IndentingWriter writer) throws IOException {
     83         if (exceptionType == null) {
     84             writer.write(".catchall");
     85         } else {
     86             writer.write(".catch ");
     87             writer.write(exceptionType);
     88         }
     89         writer.write(" {");
     90         tryStartLabel.writeTo(writer);
     91         writer.write(" .. ");
     92         tryEndLabel.writeTo(writer);
     93         writer.write("} ");
     94         handlerLabel.writeTo(writer);
     95         return true;
     96     }
     97 }
     98