1/* 2 * Copyright (c) 2010, 2015, 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. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24/* 25 * @test 26 * @bug 8041648 27 * @summary Verify that end positions are sane if semicolons are missing. 28 * @modules jdk.compiler/com.sun.tools.javac.api 29 * jdk.compiler/com.sun.tools.javac.file 30 * jdk.compiler/com.sun.tools.javac.parser 31 * jdk.compiler/com.sun.tools.javac.tree 32 * jdk.compiler/com.sun.tools.javac.util 33 * @run main MissingSemicolonTest MissingSemicolonTest.java 34 */ 35 36import java.io.File; 37import java.io.IOException; 38import java.net.URI; 39import java.nio.file.Files; 40import java.util.*; 41 42import javax.tools.*; 43 44import com.sun.source.tree.*; 45import com.sun.source.tree.Tree.Kind; 46import com.sun.source.util.*; 47import com.sun.tools.javac.api.JavacTool; 48import com.sun.tools.javac.parser.Scanner; 49import com.sun.tools.javac.parser.ScannerFactory; 50import com.sun.tools.javac.tree.JCTree; 51import com.sun.tools.javac.tree.JCTree.JCCompilationUnit; 52import com.sun.tools.javac.util.Context; 53 54public class MissingSemicolonTest { 55 public static void main(String... args) throws IOException { 56 String testSrc = System.getProperty("test.src"); 57 File baseDir = new File(testSrc); 58 boolean ok = new MissingSemicolonTest().run(baseDir, args); 59 if (!ok) { 60 throw new Error("failed"); 61 } 62 } 63 64 boolean run(File baseDir, String... args) throws IOException { 65 try { 66 if (args.length == 0) { 67 throw new IllegalStateException("Needs input files."); 68 } 69 70 for (String arg : args) { 71 File file = new File(baseDir, arg); 72 if (file.exists()) 73 test(file); 74 else 75 error("File not found: " + file); 76 } 77 78 System.err.println(fileCount + " files read"); 79 if (errors > 0) 80 System.err.println(errors + " errors"); 81 82 return errors == 0; 83 } finally { 84 fm.close(); 85 } 86 } 87 88 void test(File file) { 89 if (file.isFile() && file.getName().endsWith(".java")) { 90 try { 91 fileCount++; 92 String content = new String(Files.readAllBytes(file.toPath())); 93 List<int[]> spans = gatherTreeSpans(file, content); 94 int nextSemicolon = -1; 95 96 //remove semicolons, one at a time, and verify the positions are still meaningful: 97 while ((nextSemicolon = content.indexOf(';', nextSemicolon + 1)) != (-1)) { 98 String updatedContent = 99 content.substring(0, nextSemicolon) + 100 " " + 101 content.substring(nextSemicolon + 1); 102 verifyTreeSpans(file, spans, updatedContent, nextSemicolon); 103 } 104 } catch (IOException e) { 105 error("Error reading " + file + ": " + e); 106 } 107 } 108 } 109 110 public List<int[]> gatherTreeSpans(File file, String content) throws IOException { 111 JCCompilationUnit unit = read(file.toURI(), content); 112 List<int[]> spans = new ArrayList<>(); 113 new TreePathScanner<Void, Void>() { 114 @Override 115 public Void scan(Tree tree, Void p) { 116 if (tree != null) { 117 int start = ((JCTree) tree).getStartPosition(); 118 int end = ((JCTree) tree).getEndPosition(unit.endPositions); 119 120 spans.add(new int[] {start, end}); 121 } 122 return super.scan(tree, p); 123 } 124 }.scan(unit, null); 125 return spans; 126 } 127 128 public void verifyTreeSpans(File file, List<int[]> spans, 129 String updatedContent, int semicolon) throws IOException { 130 JCCompilationUnit updated = read(file.toURI(), updatedContent); 131 Iterator<int[]> nextSpan = spans.iterator(); 132 new TreePathScanner<Void, Void>() { 133 @Override 134 public Void scan(Tree tree, Void p) { 135 if (tree != null) { 136 int start = ((JCTree) tree).getStartPosition(); 137 int end = ((JCTree) tree).getEndPosition(updated.endPositions); 138 139 if (tree.getKind() != Kind.ERRONEOUS) { 140 int[] expected = nextSpan.next(); 141 int expectedEnd = expected[1]; 142 143 if (expectedEnd == semicolon + 1) { 144 Scanner scanner = scannerFactory.newScanner(updatedContent, true); 145 scanner.nextToken(); 146 while (scanner.token().pos < expectedEnd) 147 scanner.nextToken(); 148 expectedEnd = scanner.token().pos; 149 } 150 151 if (expected[0] != start || expectedEnd != end) { 152 error(updatedContent + "; semicolon: " + semicolon + "; expected: " + 153 expected[0] + "-" + expectedEnd + "; found=" + start + "-" + end + 154 ";" + tree); 155 } 156 } 157 } 158 return super.scan(tree, p); 159 } 160 }.scan(updated, null); 161 } 162 163 DiagnosticListener<JavaFileObject> devNull = (d) -> {}; 164 JavacTool tool = JavacTool.create(); 165 StandardJavaFileManager fm = tool.getStandardFileManager(devNull, null, null); 166 ScannerFactory scannerFactory = ScannerFactory.instance(new Context()); 167 168 /** 169 * Read a file. 170 * @param file the file to be read 171 * @return the tree for the content of the file 172 * @throws IOException if any IO errors occur 173 * @throws MissingSemicolonTest.ParseException if any errors occur while parsing the file 174 */ 175 JCCompilationUnit read(URI uri, String content) throws IOException { 176 JavacTool tool = JavacTool.create(); 177 JavacTask task = tool.getTask(null, fm, devNull, Collections.<String>emptyList(), null, 178 Arrays.<JavaFileObject>asList(new JavaSource(uri, content))); 179 Iterable<? extends CompilationUnitTree> trees = task.parse(); 180 Iterator<? extends CompilationUnitTree> iter = trees.iterator(); 181 if (!iter.hasNext()) 182 throw new Error("no trees found"); 183 JCCompilationUnit t = (JCCompilationUnit) iter.next(); 184 if (iter.hasNext()) 185 throw new Error("too many trees found"); 186 return t; 187 } 188 189 class JavaSource extends SimpleJavaFileObject { 190 191 private final String content; 192 public JavaSource(URI uri, String content) { 193 super(uri, JavaFileObject.Kind.SOURCE); 194 this.content = content; 195 } 196 197 @Override 198 public CharSequence getCharContent(boolean ignoreEncodingErrors) { 199 return content; 200 } 201 } 202 203 /** 204 * Report an error. When the program is complete, the program will either 205 * exit or throw an Error if any errors have been reported. 206 * @param msg the error message 207 */ 208 void error(String msg) { 209 System.err.println(msg); 210 errors++; 211 } 212 213 /** Number of files that have been analyzed. */ 214 int fileCount; 215 /** Number of errors reported. */ 216 int errors; 217 218} 219 220class TestCase { 221 String str1; 222 String str2; 223 public TestCase() { 224 super(); 225 super.hashCode(); 226 } 227 public TestCase(String str1, String str2) { 228 super(); 229 this.str1 = str1; 230 this.str2 = str2; 231 assert true; 232 } 233 234 void newClass() { 235 new String(); 236 new String(); 237 } 238 239 void localVars() { 240 String str1 = ""; 241 String str2; 242 String str3; 243 final String str4; 244 } 245 246 void throwsException() { 247 throw new IllegalStateException(); 248 } 249 250 int returnWithExpression() { 251 return 1; 252 } 253 254 void returnWithoutExpression() { 255 return ; 256 } 257 258 void doWhileBreakContinue() { 259 do { 260 if (true) 261 break; 262 if (false) 263 continue; 264 } while(true); 265 } 266 267 void labelled() { 268 LABEL: doWhileBreakContinue(); 269 } 270 271} 272