jdk8-mips64-public/langtools: src/share/classes/com/sun/tools/javap/LocalVariableTableWriter.java@4868a36f6fd8 (annotated)

src/share/classes/com/sun/tools/javap/LocalVariableTableWriter.java@4868a36f6fd8 (annotated)

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

Tue, 28 Dec 2010 15:54:52 -0800

author: ohair
date: Tue, 28 Dec 2010 15:54:52 -0800
changeset 798: 4868a36f6fd8
parent 581: f2fdd52e4e87
child 2525: 2eb010b6cb22
permissions: -rw-r--r--

6962318: Update copyright year
Reviewed-by: xdono

 /*
  * 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.Attribute;
 import com.sun.tools.classfile.Code_attribute;
 import com.sun.tools.classfile.ConstantPool;
 import com.sun.tools.classfile.ConstantPoolException;
 import com.sun.tools.classfile.Descriptor;
 import com.sun.tools.classfile.Descriptor.InvalidDescriptor;
 import com.sun.tools.classfile.Instruction;
 import com.sun.tools.classfile.LocalVariableTable_attribute;
 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 local variables.
  *
  *  <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 LocalVariableTableWriter extends  InstructionDetailWriter {
     public enum NoteKind {
         START("start") {
             public boolean match(LocalVariableTable_attribute.Entry entry, int pc) {
                 return (pc == entry.start_pc);
             }
         },
         END("end") {
             public boolean match(LocalVariableTable_attribute.Entry entry, int pc) {
                 return (pc == entry.start_pc + entry.length);
             }
         };
         NoteKind(String text) {
             this.text = text;
         }
         public abstract boolean match(LocalVariableTable_attribute.Entry entry, int pc);
         public final String text;
     };
     static LocalVariableTableWriter instance(Context context) {
         LocalVariableTableWriter instance = context.get(LocalVariableTableWriter.class);
         if (instance == null)
             instance = new LocalVariableTableWriter(context);
         return instance;
     }
     protected LocalVariableTableWriter(Context context) {
         super(context);
         context.put(LocalVariableTableWriter.class, this);
         classWriter = ClassWriter.instance(context);
     }
     public void reset(Code_attribute attr) {
         codeAttr = attr;
         pcMap = new HashMap<Integer, List<LocalVariableTable_attribute.Entry>>();
         LocalVariableTable_attribute lvt =
                 (LocalVariableTable_attribute) (attr.attributes.get(Attribute.LocalVariableTable));
         if (lvt == null)
             return;
         for (int i = 0; i < lvt.local_variable_table.length; i++) {
             LocalVariableTable_attribute.Entry entry = lvt.local_variable_table[i];
             put(entry.start_pc, entry);
             put(entry.start_pc + entry.length, entry);
         }
     }
     public void writeDetails(Instruction instr) {
         int pc = instr.getPC();
         writeLocalVariables(pc, NoteKind.END);
         writeLocalVariables(pc, NoteKind.START);
     }
     @Override
     public void flush() {
         int pc = codeAttr.code_length;
         writeLocalVariables(pc, NoteKind.END);
     }
     public void writeLocalVariables(int pc, NoteKind kind) {
         ConstantPool constant_pool = classWriter.getClassFile().constant_pool;
         String indent = space(2); // get from Options?
         List<LocalVariableTable_attribute.Entry> entries = pcMap.get(pc);
         if (entries != null) {
             for (ListIterator<LocalVariableTable_attribute.Entry> iter =
                     entries.listIterator(kind == NoteKind.END ? entries.size() : 0);
                     kind == NoteKind.END ? iter.hasPrevious() : iter.hasNext() ; ) {
                 LocalVariableTable_attribute.Entry entry =
                         kind == NoteKind.END ? iter.previous() : iter.next();
                 if (kind.match(entry, pc)) {
                     print(indent);
                     print(kind.text);
                     print(" local ");
                     print(entry.index);
                     print(" // ");
                     Descriptor d = new Descriptor(entry.descriptor_index);
                     try {
                         print(d.getFieldType(constant_pool));
                     } catch (InvalidDescriptor e) {
                         print(report(e));
                     } catch (ConstantPoolException e) {
                         print(report(e));
                     }
                     print(" ");
                     try {
                         print(constant_pool.getUTF8Value(entry.name_index));
                     } catch (ConstantPoolException e) {
                         print(report(e));
                     }
                     println();
                 }
             }
         }
     }
     private void put(int pc, LocalVariableTable_attribute.Entry entry) {
         List<LocalVariableTable_attribute.Entry> list = pcMap.get(pc);
         if (list == null) {
             list = new ArrayList<LocalVariableTable_attribute.Entry>();
             pcMap.put(pc, list);
         }
         if (!list.contains(entry))
             list.add(entry);
     }
     private ClassWriter classWriter;
     private Code_attribute codeAttr;
     private Map<Integer, List<LocalVariableTable_attribute.Entry>> pcMap;
 }

Mercurial > jdk8-mips64-public > langtools / annotate

src/share/classes/com/sun/tools/javap/LocalVariableTableWriter.java@4868a36f6fd8 (annotated)

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