1 /* |
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2 * Copyright 2002-2008 Sun Microsystems, Inc. All Rights Reserved. |
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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4 * |
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5 * This code is free software; you can redistribute it and/or modify it |
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6 * under the terms of the GNU General Public License version 2 only, as |
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7 * published by the Free Software Foundation. Sun designates this |
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8 * particular file as subject to the "Classpath" exception as provided |
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9 * by Sun in the LICENSE file that accompanied this code. |
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10 * |
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11 * This code is distributed in the hope that it will be useful, but WITHOUT |
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12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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14 * version 2 for more details (a copy is included in the LICENSE file that |
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15 * accompanied this code). |
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16 * |
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17 * You should have received a copy of the GNU General Public License version |
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18 * 2 along with this work; if not, write to the Free Software Foundation, |
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19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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20 * |
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21 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
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22 * CA 95054 USA or visit www.sun.com if you need additional information or |
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23 * have any questions. |
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24 */ |
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25 |
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26 |
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27 |
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28 package sun.tools.javap; |
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29 |
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30 import java.util.*; |
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31 import java.io.*; |
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32 |
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33 /** |
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34 * Entry point for javap, class file disassembler. |
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35 * |
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36 * @author Sucheta Dambalkar (Adopted code from old javap) |
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37 */ |
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38 public class Main { |
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39 |
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40 private Vector<String> classList = new Vector<String>(); |
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41 private PrintWriter out; |
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42 JavapEnvironment env = new JavapEnvironment(); |
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43 private static boolean errorOccurred = false; |
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44 private static final String progname = "javap"; |
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45 |
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46 |
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47 public Main(PrintWriter out){ |
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48 this.out = out; |
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49 } |
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50 |
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51 public static void main(String argv[]) { |
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52 // unless first arg is -Xold, use new javap |
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53 if (!(argv.length >= 1 && argv[0].equals("-Xold"))) { |
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54 com.sun.tools.javap.Main.main(argv); |
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55 return; |
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56 } |
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57 |
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58 entry(argv); |
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59 if (errorOccurred) { |
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60 System.exit(1); |
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61 } |
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62 } |
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63 |
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64 |
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65 /** |
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66 * Entry point for tool if you don't want System.exit() called. |
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67 */ |
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68 public static void entry(String argv[]) { |
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69 PrintWriter out = new PrintWriter(new OutputStreamWriter(System.out)); |
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70 try { |
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71 |
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72 Main jpmain = new Main(out); |
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73 jpmain.perform(argv); |
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74 |
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75 } finally { |
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76 out.close(); |
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77 } |
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78 } |
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79 |
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80 /** |
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81 * Process the arguments and perform the desired action |
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82 */ |
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83 private void perform(String argv[]) { |
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84 if (parseArguments(argv)) { |
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85 displayResults(); |
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86 |
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87 } |
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88 } |
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89 |
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90 private void error(String msg) { |
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91 errorOccurred = true; |
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92 System.err.println(msg); |
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93 System.err.flush(); |
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94 } |
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95 |
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96 /** |
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97 * Print usage information |
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98 */ |
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99 private void usage() { |
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100 java.io.PrintStream out = System.out; |
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101 out.println("Usage: " + progname + " <options> <classes>..."); |
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102 out.println(); |
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103 out.println("where options include:"); |
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104 out.println(" -c Disassemble the code"); |
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105 out.println(" -classpath <pathlist> Specify where to find user class files"); |
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106 out.println(" -extdirs <dirs> Override location of installed extensions"); |
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107 out.println(" -help Print this usage message"); |
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108 out.println(" -J<flag> Pass <flag> directly to the runtime system"); |
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109 out.println(" -l Print line number and local variable tables"); |
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110 out.println(" -public Show only public classes and members"); |
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111 out.println(" -protected Show protected/public classes and members"); |
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112 out.println(" -package Show package/protected/public classes"); |
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113 out.println(" and members (default)"); |
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114 out.println(" -private Show all classes and members"); |
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115 out.println(" -s Print internal type signatures"); |
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116 out.println(" -bootclasspath <pathlist> Override location of class files loaded"); |
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117 out.println(" by the bootstrap class loader"); |
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118 out.println(" -verbose Print stack size, number of locals and args for methods"); |
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119 out.println(" If verifying, print reasons for failure"); |
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120 out.println(); |
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121 } |
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122 |
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123 /** |
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124 * Parse the command line arguments. |
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125 * Set flags, construct the class list and create environment. |
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126 */ |
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127 private boolean parseArguments(String argv[]) { |
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128 for (int i = 0 ; i < argv.length ; i++) { |
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129 String arg = argv[i]; |
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130 if (arg.startsWith("-")) { |
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131 if (arg.equals("-l")) { |
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132 env.showLineAndLocal = true; |
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133 } else if (arg.equals("-private") || arg.equals("-p")) { |
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134 env.showAccess = env.PRIVATE; |
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135 } else if (arg.equals("-package")) { |
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136 env.showAccess = env.PACKAGE; |
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137 } else if (arg.equals("-protected")) { |
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138 env.showAccess = env.PROTECTED; |
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139 } else if (arg.equals("-public")) { |
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140 env.showAccess = env.PUBLIC; |
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141 } else if (arg.equals("-c")) { |
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142 env.showDisassembled = true; |
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143 } else if (arg.equals("-s")) { |
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144 env.showInternalSigs = true; |
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145 } else if (arg.equals("-verbose")) { |
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146 env.showVerbose = true; |
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147 } else if (arg.equals("-v")) { |
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148 env.showVerbose = true; |
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149 } else if (arg.equals("-h")) { |
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150 error("-h is no longer available - use the 'javah' program"); |
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151 return false; |
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152 } else if (arg.equals("-verify")) { |
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153 error("-verify is no longer available - use 'java -verify'"); |
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154 return false; |
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155 } else if (arg.equals("-verify-verbose")) { |
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156 error("-verify is no longer available - use 'java -verify'"); |
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157 return false; |
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158 } else if (arg.equals("-help")) { |
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159 usage(); |
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160 return false; |
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161 } else if (arg.equals("-classpath")) { |
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162 if ((i + 1) < argv.length) { |
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163 env.classPathString = argv[++i]; |
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164 } else { |
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165 error("-classpath requires argument"); |
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166 usage(); |
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167 return false; |
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168 } |
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169 } else if (arg.equals("-bootclasspath")) { |
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170 if ((i + 1) < argv.length) { |
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171 env.bootClassPathString = argv[++i]; |
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172 } else { |
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173 error("-bootclasspath requires argument"); |
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174 usage(); |
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175 return false; |
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176 } |
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177 } else if (arg.equals("-extdirs")) { |
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178 if ((i + 1) < argv.length) { |
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179 env.extDirsString = argv[++i]; |
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180 } else { |
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181 error("-extdirs requires argument"); |
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182 usage(); |
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183 return false; |
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184 } |
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185 } else if (arg.equals("-all")) { |
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186 env.showallAttr = true; |
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187 } else if (arg.equals("-Xold")) { |
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188 // ignore: this is old javap |
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189 } else { |
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190 error("invalid flag: " + arg); |
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191 usage(); |
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192 return false; |
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193 } |
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194 } else { |
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195 classList.addElement(arg); |
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196 env.nothingToDo = false; |
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197 } |
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198 } |
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199 if (env.nothingToDo) { |
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200 System.out.println("No classes were specified on the command line. Try -help."); |
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201 errorOccurred = true; |
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202 return false; |
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203 } |
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204 return true; |
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205 } |
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206 |
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207 /** |
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208 * Display results |
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209 */ |
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210 private void displayResults() { |
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211 for (int i = 0; i < classList.size() ; i++ ) { |
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212 String Name = classList.elementAt(i); |
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213 InputStream classin = env.getFileInputStream(Name); |
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214 |
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215 try { |
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216 JavapPrinter printer = new JavapPrinter(classin, out, env); |
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217 printer.print(); // actual do display |
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218 |
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219 } catch (IllegalArgumentException exc) { |
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220 error(exc.getMessage()); |
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221 } |
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222 } |
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223 } |
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224 } |
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