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1 /*
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2 * Copyright 2003-2005 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.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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20 * CA 95054 USA or visit www.sun.com if you need additional information or
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21 * have any questions.
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22 *
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23 */
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24
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25 import java.io.*;
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26 import java.util.*;
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27
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28 class jvmtiEnvFill {
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29
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30 public static void main(String[] args) throws IOException {
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31 if (args.length != 3) {
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32 System.err.println("usage: <filledFile> <stubFile> <resultFile>");
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33 System.exit(1);
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34 }
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35 String filledFN = args[0];
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36 String stubFN = args[1];
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37 String resultFN = args[2];
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38
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39 SourceFile filledSF = new SourceFile(filledFN);
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40 SourceFile stubSF = new SourceFile(stubFN);
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41
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42
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43 stubSF.fill(filledSF);
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44
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45 PrintWriter out = new PrintWriter(new FileWriter(resultFN));
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46 stubSF.output(out);
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47 out.close();
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48 }
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49 }
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50
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51 class SourceFile {
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52
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53 static final String endFilePrefix = "// end file prefix";
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54 static final String functionPrefix = "JvmtiEnv::";
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55
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56 final String fn;
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57 LineNumberReader in;
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58 String line;
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59 List<String> top = new ArrayList<String>();
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60 List<String> before = new ArrayList<String>();
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61 boolean inFilePrefix = true;
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62 List<Function> functions = new ArrayList<Function>();
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63 Map<String, Function> functionMap = new HashMap<String, Function>();
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64
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65 class Function {
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66 String name;
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67 String args;
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68 String compareArgs;
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69 List comment;
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70 List<String> body = new ArrayList<String>();
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71
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72 Function() throws IOException {
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73 line = in.readLine();
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74 String trimmed = line.trim();
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75 if (!trimmed.startsWith(functionPrefix)) {
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76 error("expected '" + functionPrefix + "'");
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77 }
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78 int index = trimmed.indexOf('(', functionPrefix.length());
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79 if (index == -1) {
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80 error("missing open paren");
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81 }
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82 name = trimmed.substring(functionPrefix.length(), index);
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83 int index2 = trimmed.indexOf(')', index);
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84 if (index2 == -1) {
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85 error("missing close paren - must be on same line");
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86 }
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87 args = trimmed.substring(index+1, index2);
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88 compareArgs = args.replaceAll("\\s", "");
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89 String tail = trimmed.substring(index2+1).trim();
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90 if (!tail.equals("{")) {
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91 error("function declaration first line must end with open bracket '{', instead got '" +
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92 tail + "'");
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93 }
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94 while(true) {
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95 line = in.readLine();
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96 if (line == null) {
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97 line = ""; // so error does not look wierd
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98 error("unexpected end of file");
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99 }
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100 if (line.startsWith("}")) {
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101 break;
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102 }
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103 body.add(line);
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104 }
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105 String expected = "} /* end " + name + " */";
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106 trimmed = line.replaceAll("\\s","");
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107 if (!trimmed.equals(expected.replaceAll("\\s",""))) {
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108 error("function end is malformed - should be: " + expected);
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109 }
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110 // copy over the comment prefix
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111 comment = before;
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112 before = new ArrayList<String>();
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113 }
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114
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115 void remove() {
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116 functionMap.remove(name);
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117 }
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118
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119 String fileName() {
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120 return fn;
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121 }
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122
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123 void fill(Function filledFunc) {
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124 if (filledFunc == null) {
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125 System.err.println("Warning: function " + name + " missing from filled file");
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126 body.add(0, " /*** warning: function added and not filled in ***/");
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127 } else {
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128 int fbsize = filledFunc.body.size();
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129 int bsize = body.size();
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130 if (fbsize > bsize || !body.subList(bsize-fbsize,bsize).equals(filledFunc.body)) {
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131 // it has actually been filled in
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132 body = filledFunc.body;
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133 if (!compareArgs.equals(filledFunc.compareArgs)) {
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134 System.err.println("Warning: function " + name +
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135 ": filled and stub arguments differ");
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136 System.err.println(" old (filled): " + filledFunc.args);
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137 System.err.println(" new (stub): " + args);
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138 body.add(0, " /*** warning: arguments changed, were: " +
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139 filledFunc.args + " ***/");
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140 }
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141 }
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142 filledFunc.remove(); // mark used
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143 }
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144 }
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145
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146 void output(PrintWriter out) {
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147 Iterator it = comment.iterator();
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148 while (it.hasNext()) {
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149 out.println(it.next());
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150 }
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151 out.println("jvmtiError");
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152 out.print(functionPrefix);
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153 out.print(name);
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154 out.print('(');
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155 out.print(args);
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156 out.println(") {");
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157 it = body.iterator();
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158 while (it.hasNext()) {
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159 out.println(it.next());
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160 }
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161 out.print("} /* end ");
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162 out.print(name);
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163 out.println(" */");
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164 }
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165 }
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166
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167 SourceFile(String fn) throws IOException {
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168 this.fn = fn;
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169 Reader reader = new FileReader(fn);
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170 in = new LineNumberReader(reader);
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171
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172 while (readGaps()) {
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173 Function func = new Function();
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174 functionMap.put(func.name, func);
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175 functions.add(func);
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176 }
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177
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178 in.close();
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179 }
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180
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181 void error(String msg) {
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182 System.err.println("Fatal error parsing file: " + fn);
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183 System.err.println("Line number: " + in.getLineNumber());
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184 System.err.println("Error message: " + msg);
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185 System.err.println("Source line: " + line);
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186 System.exit(1);
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187 }
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188
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189 boolean readGaps() throws IOException {
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190 while(true) {
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191 line = in.readLine();
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192 if (line == null) {
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193 return false; // end of file
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194 }
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195 if (!inFilePrefix && line.startsWith("}")) {
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196 error("unexpected close bracket in first column, outside of function.\n");
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197 }
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198 String trimmed = line.trim();
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199 if (line.startsWith("jvmtiError")) {
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200 if (trimmed.equals("jvmtiError")) {
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201 if (inFilePrefix) {
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202 error("unexpected 'jvmtiError' line in file prefix.\n" +
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203 "is '" + endFilePrefix + "'... line missing?");
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204 }
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205 return true; // beginning of a function
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206 } else {
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207 error("extra characters at end of 'jvmtiError'");
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208 }
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209 }
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210 if (inFilePrefix) {
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211 top.add(line);
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212 } else {
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213 trimmed = line.trim();
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214 if (!trimmed.equals("") && !trimmed.startsWith("//") && !trimmed.startsWith("#")) {
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215 error("only comments and blank lines allowed between functions");
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216 }
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217 before.add(line);
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218 }
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219 if (line.replaceAll("\\s","").toLowerCase().startsWith(endFilePrefix.replaceAll("\\s",""))) {
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220 if (!inFilePrefix) {
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221 error("excess '" + endFilePrefix + "'");
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222 }
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223 inFilePrefix = false;
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224 }
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225 }
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226 }
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227
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228 void fill(SourceFile filledSF) {
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229 // copy beginning of file straight from filled file
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230 top = filledSF.top;
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231
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232 // file in functions
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233 Iterator it = functions.iterator();
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234 while (it.hasNext()) {
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235 Function stubFunc = (Function)(it.next());
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236 Function filledFunc = (Function)filledSF.functionMap.get(stubFunc.name);
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237 stubFunc.fill(filledFunc);
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238 }
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239 if (filledSF.functionMap.size() > 0) {
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240 System.err.println("Warning: the following functions were present in the " +
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241 "filled file but missing in the stub file and thus not copied:");
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242 it = filledSF.functionMap.values().iterator();
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243 while (it.hasNext()) {
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244 System.err.println(" " + ((Function)(it.next())).name);
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245 }
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246 }
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247 }
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248
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249 void output(PrintWriter out) {
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250 Iterator it = top.iterator();
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251 while (it.hasNext()) {
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252 out.println(it.next());
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253 }
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254 it = functions.iterator();
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255 while (it.hasNext()) {
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256 Function stubFunc = (Function)(it.next());
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257 stubFunc.output(out);
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258 }
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259 }
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260 }
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