Mercurial > jdk8-mips64-public > langtools / file comparison
comparison: src/share/classes/com/sun/tools/javap/TryBlockWriter.java
src/share/classes/com/sun/tools/javap/TryBlockWriter.java
- changeset 283
- cd0630109de5
- child 554
- 9d9f26857129
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| 282:fc634a593812 | 283:cd0630109de5 |
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| 1 /* | |
| 2 * Copyright 2009 Sun Microsystems, Inc. All Rights Reserved. | |
| 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. Sun designates this | |
| 8 * particular file as subject to the "Classpath" exception as provided | |
| 9 * by Sun in the LICENSE file that accompanied this code. | |
| 10 * | |
| 11 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 14 * version 2 for more details (a copy is included in the LICENSE file that | |
| 15 * accompanied this code). | |
| 16 * | |
| 17 * You should have received a copy of the GNU General Public License version | |
| 18 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 20 * | |
| 21 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
| 22 * CA 95054 USA or visit www.sun.com if you need additional information or | |
| 23 * have any questions. | |
| 24 */ | |
| 25 | |
| 26 package com.sun.tools.javap; | |
| 27 | |
| 28 import com.sun.tools.classfile.Code_attribute; | |
| 29 import com.sun.tools.classfile.Code_attribute.Exception_data; | |
| 30 import com.sun.tools.classfile.Instruction; | |
| 31 import java.util.ArrayList; | |
| 32 import java.util.HashMap; | |
| 33 import java.util.List; | |
| 34 import java.util.ListIterator; | |
| 35 import java.util.Map; | |
| 36 | |
| 37 /** | |
| 38 * Annotate instructions with details about try blocks. | |
| 39 * | |
| 40 * <p><b>This is NOT part of any API supported by Sun Microsystems. If | |
| 41 * you write code that depends on this, you do so at your own risk. | |
| 42 * This code and its internal interfaces are subject to change or | |
| 43 * deletion without notice.</b> | |
| 44 */ | |
| 45 public class TryBlockWriter extends InstructionDetailWriter { | |
| 46 public enum NoteKind { | |
| 47 START("try") { | |
| 48 public boolean match(Exception_data entry, int pc) { | |
| 49 return (pc == entry.start_pc); | |
| 50 } | |
| 51 }, | |
| 52 END("end try") { | |
| 53 public boolean match(Exception_data entry, int pc) { | |
| 54 return (pc == entry.end_pc); | |
| 55 } | |
| 56 }, | |
| 57 HANDLER("catch") { | |
| 58 public boolean match(Exception_data entry, int pc) { | |
| 59 return (pc == entry.handler_pc); | |
| 60 } | |
| 61 }; | |
| 62 NoteKind(String text) { | |
| 63 this.text = text; | |
| 64 } | |
| 65 public abstract boolean match(Exception_data entry, int pc); | |
| 66 public final String text; | |
| 67 }; | |
| 68 | |
| 69 static TryBlockWriter instance(Context context) { | |
| 70 TryBlockWriter instance = context.get(TryBlockWriter.class); | |
| 71 if (instance == null) | |
| 72 instance = new TryBlockWriter(context); | |
| 73 return instance; | |
| 74 } | |
| 75 | |
| 76 protected TryBlockWriter(Context context) { | |
| 77 super(context); | |
| 78 context.put(TryBlockWriter.class, this); | |
| 79 constantWriter = ConstantWriter.instance(context); | |
| 80 } | |
| 81 | |
| 82 public void reset(Code_attribute attr) { | |
| 83 indexMap = new HashMap<Exception_data, Integer>(); | |
| 84 pcMap = new HashMap<Integer, List<Exception_data>>(); | |
| 85 for (int i = 0; i < attr.exception_table.length; i++) { | |
| 86 Exception_data entry = attr.exception_table[i]; | |
| 87 indexMap.put(entry, i); | |
| 88 put(entry.start_pc, entry); | |
| 89 put(entry.end_pc, entry); | |
| 90 put(entry.handler_pc, entry); | |
| 91 } | |
| 92 } | |
| 93 | |
| 94 public void writeDetails(Instruction instr) { | |
| 95 writeTrys(instr, NoteKind.END); | |
| 96 writeTrys(instr, NoteKind.START); | |
| 97 writeTrys(instr, NoteKind.HANDLER); | |
| 98 } | |
| 99 | |
| 100 public void writeTrys(Instruction instr, NoteKind kind) { | |
| 101 String indent = space(2); // get from Options? | |
| 102 int pc = instr.getPC(); | |
| 103 List<Exception_data> entries = pcMap.get(pc); | |
| 104 if (entries != null) { | |
| 105 for (ListIterator<Exception_data> iter = | |
| 106 entries.listIterator(kind == NoteKind.END ? entries.size() : 0); | |
| 107 kind == NoteKind.END ? iter.hasPrevious() : iter.hasNext() ; ) { | |
| 108 Exception_data entry = | |
| 109 kind == NoteKind.END ? iter.previous() : iter.next(); | |
| 110 if (kind.match(entry, pc)) { | |
| 111 print(indent); | |
| 112 print(kind.text); | |
| 113 print("["); | |
| 114 print(indexMap.get(entry)); | |
| 115 print("] "); | |
| 116 if (entry.catch_type == 0) | |
| 117 print("finally"); | |
| 118 else { | |
| 119 print("#" + entry.catch_type); | |
| 120 print(" // "); | |
| 121 constantWriter.write(entry.catch_type); | |
| 122 } | |
| 123 println(); | |
| 124 } | |
| 125 } | |
| 126 } | |
| 127 } | |
| 128 | |
| 129 private void put(int pc, Exception_data entry) { | |
| 130 List<Exception_data> list = pcMap.get(pc); | |
| 131 if (list == null) { | |
| 132 list = new ArrayList<Exception_data>(); | |
| 133 pcMap.put(pc, list); | |
| 134 } | |
| 135 if (!list.contains(entry)) | |
| 136 list.add(entry); | |
| 137 } | |
| 138 | |
| 139 private Map<Integer, List<Exception_data>> pcMap; | |
| 140 private Map<Exception_data, Integer> indexMap; | |
| 141 private ConstantWriter constantWriter; | |
| 142 } |
