jdk8-mips64-public/langtools: src/share/classes/com/sun/tools/javap/TryBlockWriter.java@ae3acbf63943 (annotated)

src/share/classes/com/sun/tools/javap/TryBlockWriter.java@ae3acbf63943 (annotated)

src/share/classes/com/sun/tools/javap/TryBlockWriter.java

Thu, 26 Aug 2010 16:13:33 -0700

author: jjg
date: Thu, 26 Aug 2010 16:13:33 -0700
changeset 660: ae3acbf63943
parent 581: f2fdd52e4e87
child 2525: 2eb010b6cb22
permissions: -rw-r--r--

6980017: javap -XDdetail:source behaves badly if source not available.
Reviewed-by: ksrini

 /*
  * Copyright (c) 2009, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.  Oracle designates this
  * particular file as subject to the "Classpath" exception as provided
  * by Oracle in the LICENSE file that accompanied this code.
  *
  * This code is distributed in the hope that it will be useful, but WITHOUT
  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  * version 2 for more details (a copy is included in the LICENSE file that
  * accompanied this code).
  *
  * You should have received a copy of the GNU General Public License version
  * 2 along with this work; if not, write to the Free Software Foundation,
  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  *
  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  */
 package com.sun.tools.javap;
 import com.sun.tools.classfile.Code_attribute;
 import com.sun.tools.classfile.Code_attribute.Exception_data;
 import com.sun.tools.classfile.Instruction;
 import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.List;
 import java.util.ListIterator;
 import java.util.Map;
 /**
  * Annotate instructions with details about try blocks.
  *
  *  <p><b>This is NOT part of any supported API.
  *  If you write code that depends on this, you do so at your own risk.
  *  This code and its internal interfaces are subject to change or
  *  deletion without notice.</b>
  */
 public class TryBlockWriter extends InstructionDetailWriter {
     public enum NoteKind {
         START("try") {
             public boolean match(Exception_data entry, int pc) {
                 return (pc == entry.start_pc);
             }
         },
         END("end try") {
             public boolean match(Exception_data entry, int pc) {
                 return (pc == entry.end_pc);
             }
         },
         HANDLER("catch") {
             public boolean match(Exception_data entry, int pc) {
                 return (pc == entry.handler_pc);
             }
         };
         NoteKind(String text) {
             this.text = text;
         }
         public abstract boolean match(Exception_data entry, int pc);
         public final String text;
     };
     static TryBlockWriter instance(Context context) {
         TryBlockWriter instance = context.get(TryBlockWriter.class);
         if (instance == null)
             instance = new TryBlockWriter(context);
         return instance;
     }
     protected TryBlockWriter(Context context) {
         super(context);
         context.put(TryBlockWriter.class, this);
         constantWriter = ConstantWriter.instance(context);
     }
     public void reset(Code_attribute attr) {
         indexMap = new HashMap<Exception_data, Integer>();
         pcMap = new HashMap<Integer, List<Exception_data>>();
         for (int i = 0; i < attr.exception_table.length; i++) {
             Exception_data entry = attr.exception_table[i];
             indexMap.put(entry, i);
             put(entry.start_pc, entry);
             put(entry.end_pc, entry);
             put(entry.handler_pc, entry);
         }
     }
     public void writeDetails(Instruction instr) {
         writeTrys(instr, NoteKind.END);
         writeTrys(instr, NoteKind.START);
         writeTrys(instr, NoteKind.HANDLER);
     }
     public void writeTrys(Instruction instr, NoteKind kind) {
         String indent = space(2); // get from Options?
         int pc = instr.getPC();
         List<Exception_data> entries = pcMap.get(pc);
         if (entries != null) {
             for (ListIterator<Exception_data> iter =
                     entries.listIterator(kind == NoteKind.END ? entries.size() : 0);
                     kind == NoteKind.END ? iter.hasPrevious() : iter.hasNext() ; ) {
                 Exception_data entry =
                         kind == NoteKind.END ? iter.previous() : iter.next();
                 if (kind.match(entry, pc)) {
                     print(indent);
                     print(kind.text);
                     print("[");
                     print(indexMap.get(entry));
                     print("] ");
                     if (entry.catch_type == 0)
                         print("finally");
                     else {
                         print("#" + entry.catch_type);
                         print(" // ");
                         constantWriter.write(entry.catch_type);
                     }
                     println();
                 }
             }
         }
     }
     private void put(int pc, Exception_data entry) {
         List<Exception_data> list = pcMap.get(pc);
         if (list == null) {
             list = new ArrayList<Exception_data>();
             pcMap.put(pc, list);
         }
         if (!list.contains(entry))
             list.add(entry);
     }
     private Map<Integer, List<Exception_data>> pcMap;
     private Map<Exception_data, Integer> indexMap;
     private ConstantWriter constantWriter;
 }

Mercurial > jdk8-mips64-public > langtools / annotate

src/share/classes/com/sun/tools/javap/TryBlockWriter.java@ae3acbf63943 (annotated)

src/share/classes/com/sun/tools/javap/TryBlockWriter.java