Wed, 17 Nov 2010 15:07:43 -0800
7000973: isBogus needs to be called on the to-be-returned entry, not on the current entry
Reviewed-by: jjg
Contributed-by: jan.lahoda@oracle.com
1 /*
2 * Copyright (c) 2009, Oracle and/or its affiliates. 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. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
26 package com.sun.tools.javap;
28 import java.io.BufferedReader;
29 import java.io.IOException;
30 import java.io.StringReader;
31 import java.util.ArrayList;
32 import java.util.List;
33 import java.util.Set;
34 import java.util.SortedMap;
35 import java.util.SortedSet;
36 import java.util.TreeMap;
37 import java.util.TreeSet;
38 import javax.tools.JavaFileManager;
39 import javax.tools.JavaFileManager.Location;
40 import javax.tools.JavaFileObject;
41 import javax.tools.StandardLocation;
43 import com.sun.tools.classfile.Attribute;
44 import com.sun.tools.classfile.ClassFile;
45 import com.sun.tools.classfile.Code_attribute;
46 import com.sun.tools.classfile.ConstantPoolException;
47 import com.sun.tools.classfile.Instruction;
48 import com.sun.tools.classfile.LineNumberTable_attribute;
49 import com.sun.tools.classfile.SourceFile_attribute;
52 /**
53 * Annotate instructions with source code.
54 *
55 * <p><b>This is NOT part of any supported API.
56 * If you write code that depends on this, you do so at your own risk.
57 * This code and its internal interfaces are subject to change or
58 * deletion without notice.</b>
59 */
60 public class SourceWriter extends InstructionDetailWriter {
61 static SourceWriter instance(Context context) {
62 SourceWriter instance = context.get(SourceWriter.class);
63 if (instance == null)
64 instance = new SourceWriter(context);
65 return instance;
66 }
68 protected SourceWriter(Context context) {
69 super(context);
70 context.put(SourceWriter.class, this);
71 }
73 void setFileManager(JavaFileManager fileManager) {
74 this.fileManager = fileManager;
75 }
77 public void reset(ClassFile cf, Code_attribute attr) {
78 setSource(cf);
79 setLineMap(attr);
80 }
82 public void writeDetails(Instruction instr) {
83 String indent = space(40); // could get from Options?
84 Set<Integer> lines = lineMap.get(instr.getPC());
85 if (lines != null) {
86 for (int line: lines) {
87 print(indent);
88 print(String.format(" %4d ", line));
89 if (line < sourceLines.length)
90 print(sourceLines[line]);
91 println();
92 int nextLine = nextLine(line);
93 for (int i = line + 1; i < nextLine; i++) {
94 print(indent);
95 print(String.format("(%4d)", i));
96 if (i < sourceLines.length)
97 print(sourceLines[i]);
98 println();
99 }
100 }
101 }
102 }
104 public boolean hasSource() {
105 return (sourceLines.length > 0);
106 }
108 private void setLineMap(Code_attribute attr) {
109 SortedMap<Integer, SortedSet<Integer>> map =
110 new TreeMap<Integer, SortedSet<Integer>>();
111 SortedSet<Integer> allLines = new TreeSet<Integer>();
112 for (Attribute a: attr.attributes) {
113 if (a instanceof LineNumberTable_attribute) {
114 LineNumberTable_attribute t = (LineNumberTable_attribute) a;
115 for (LineNumberTable_attribute.Entry e: t.line_number_table) {
116 int start_pc = e.start_pc;
117 int line = e.line_number;
118 SortedSet<Integer> pcLines = map.get(start_pc);
119 if (pcLines == null) {
120 pcLines = new TreeSet<Integer>();
121 map.put(start_pc, pcLines);
122 }
123 pcLines.add(line);
124 allLines.add(line);
125 }
126 }
127 }
128 lineMap = map;
129 lineList = new ArrayList<Integer>(allLines);
130 }
132 private void setSource(ClassFile cf) {
133 if (cf != classFile) {
134 classFile = cf;
135 sourceLines = splitLines(readSource(cf));
136 }
137 }
139 private String readSource(ClassFile cf) {
140 if (fileManager == null)
141 return null;
143 Location location;
144 if (fileManager.hasLocation((StandardLocation.SOURCE_PATH)))
145 location = StandardLocation.SOURCE_PATH;
146 else
147 location = StandardLocation.CLASS_PATH;
149 // Guess the source file for a class from the package name for this
150 // class and the base of the source file. This avoids having to read
151 // additional classes to determine the outmost class from any
152 // InnerClasses and EnclosingMethod attributes.
153 try {
154 String className = cf.getName();
155 SourceFile_attribute sf =
156 (SourceFile_attribute) cf.attributes.get(Attribute.SourceFile);
157 if (sf == null) {
158 report(messages.getMessage("err.no.SourceFile.attribute"));
159 return null;
160 }
161 String sourceFile = sf.getSourceFile(cf.constant_pool);
162 String fileBase = sourceFile.endsWith(".java")
163 ? sourceFile.substring(0, sourceFile.length() - 5) : sourceFile;
164 int sep = className.lastIndexOf("/");
165 String pkgName = (sep == -1 ? "" : className.substring(0, sep+1));
166 String topClassName = (pkgName + fileBase).replace('/', '.');
167 JavaFileObject fo =
168 fileManager.getJavaFileForInput(location,
169 topClassName,
170 JavaFileObject.Kind.SOURCE);
171 if (fo == null) {
172 report(messages.getMessage("err.source.file.not.found"));
173 return null;
174 }
175 return fo.getCharContent(true).toString();
176 } catch (ConstantPoolException e) {
177 report(e);
178 return null;
179 } catch (IOException e) {
180 report(e.getLocalizedMessage());
181 return null;
182 }
183 }
185 private static String[] splitLines(String text) {
186 if (text == null)
187 return new String[0];
189 List<String> lines = new ArrayList<String>();
190 lines.add(""); // dummy line 0
191 try {
192 BufferedReader r = new BufferedReader(new StringReader(text));
193 String line;
194 while ((line = r.readLine()) != null)
195 lines.add(line);
196 } catch (IOException ignore) {
197 }
198 return lines.toArray(new String[lines.size()]);
199 }
201 private int nextLine(int line) {
202 int i = lineList.indexOf(line);
203 if (i == -1 || i == lineList.size() - 1)
204 return - 1;
205 return lineList.get(i + 1);
206 }
208 private JavaFileManager fileManager;
209 private ClassFile classFile;
210 private SortedMap<Integer, SortedSet<Integer>> lineMap;
211 private List<Integer> lineList;
212 private String[] sourceLines;
213 }