272 lines
9.1 KiB
Java
272 lines
9.1 KiB
Java
/*
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* Copyright (c) 2010, 2015, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*
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* @test
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* @bug 8041648
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* @summary Verify that end positions are sane if semicolons are missing.
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* @modules jdk.compiler/com.sun.tools.javac.api
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* jdk.compiler/com.sun.tools.javac.file
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* jdk.compiler/com.sun.tools.javac.parser
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* jdk.compiler/com.sun.tools.javac.tree
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* jdk.compiler/com.sun.tools.javac.util
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* @run main MissingSemicolonTest MissingSemicolonTest.java
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*/
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import java.io.File;
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import java.io.IOException;
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import java.net.URI;
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import java.nio.file.Files;
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import java.util.*;
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import javax.tools.*;
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import com.sun.source.tree.*;
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import com.sun.source.tree.Tree.Kind;
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import com.sun.source.util.*;
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import com.sun.tools.javac.api.JavacTool;
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import com.sun.tools.javac.parser.Scanner;
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import com.sun.tools.javac.parser.ScannerFactory;
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import com.sun.tools.javac.tree.JCTree;
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import com.sun.tools.javac.tree.JCTree.JCCompilationUnit;
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import com.sun.tools.javac.util.Context;
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public class MissingSemicolonTest {
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public static void main(String... args) throws IOException {
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String testSrc = System.getProperty("test.src");
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File baseDir = new File(testSrc);
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boolean ok = new MissingSemicolonTest().run(baseDir, args);
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if (!ok) {
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throw new Error("failed");
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}
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}
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boolean run(File baseDir, String... args) throws IOException {
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try {
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if (args.length == 0) {
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throw new IllegalStateException("Needs input files.");
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}
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for (String arg : args) {
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File file = new File(baseDir, arg);
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if (file.exists())
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test(file);
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else
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error("File not found: " + file);
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}
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System.err.println(fileCount + " files read");
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if (errors > 0)
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System.err.println(errors + " errors");
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return errors == 0;
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} finally {
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fm.close();
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}
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}
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void test(File file) {
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if (file.isFile() && file.getName().endsWith(".java")) {
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try {
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fileCount++;
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String content = new String(Files.readAllBytes(file.toPath()));
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List<int[]> spans = gatherTreeSpans(file, content);
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int nextSemicolon = -1;
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//remove semicolons, one at a time, and verify the positions are still meaningful:
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while ((nextSemicolon = content.indexOf(';', nextSemicolon + 1)) != (-1)) {
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String updatedContent =
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content.substring(0, nextSemicolon) +
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" " +
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content.substring(nextSemicolon + 1);
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verifyTreeSpans(file, spans, updatedContent, nextSemicolon);
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}
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} catch (IOException e) {
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error("Error reading " + file + ": " + e);
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}
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}
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}
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public List<int[]> gatherTreeSpans(File file, String content) throws IOException {
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JCCompilationUnit unit = read(file.toURI(), content);
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List<int[]> spans = new ArrayList<>();
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new TreePathScanner<Void, Void>() {
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@Override
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public Void scan(Tree tree, Void p) {
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if (tree != null) {
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int start = ((JCTree) tree).getStartPosition();
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int end = ((JCTree) tree).getEndPosition(unit.endPositions);
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spans.add(new int[] {start, end});
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}
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return super.scan(tree, p);
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}
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}.scan(unit, null);
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return spans;
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}
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public void verifyTreeSpans(File file, List<int[]> spans,
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String updatedContent, int semicolon) throws IOException {
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JCCompilationUnit updated = read(file.toURI(), updatedContent);
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Iterator<int[]> nextSpan = spans.iterator();
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new TreePathScanner<Void, Void>() {
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@Override
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public Void scan(Tree tree, Void p) {
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if (tree != null) {
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int start = ((JCTree) tree).getStartPosition();
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int end = ((JCTree) tree).getEndPosition(updated.endPositions);
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if (tree.getKind() != Kind.ERRONEOUS) {
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int[] expected = nextSpan.next();
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int expectedEnd = expected[1];
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if (expectedEnd == semicolon + 1) {
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Scanner scanner = scannerFactory.newScanner(updatedContent, true);
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scanner.nextToken();
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while (scanner.token().pos < expectedEnd)
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scanner.nextToken();
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expectedEnd = scanner.token().pos;
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}
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if (expected[0] != start || expectedEnd != end) {
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error(updatedContent + "; semicolon: " + semicolon + "; expected: " +
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expected[0] + "-" + expectedEnd + "; found=" + start + "-" + end +
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";" + tree);
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}
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}
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}
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return super.scan(tree, p);
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}
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}.scan(updated, null);
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}
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DiagnosticListener<JavaFileObject> devNull = (d) -> {};
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JavacTool tool = JavacTool.create();
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StandardJavaFileManager fm = tool.getStandardFileManager(devNull, null, null);
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ScannerFactory scannerFactory = ScannerFactory.instance(new Context());
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/**
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* Read a file.
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* @param file the file to be read
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* @return the tree for the content of the file
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* @throws IOException if any IO errors occur
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* @throws MissingSemicolonTest.ParseException if any errors occur while parsing the file
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*/
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JCCompilationUnit read(URI uri, String content) throws IOException {
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JavacTool tool = JavacTool.create();
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JavacTask task = tool.getTask(null, fm, devNull, Collections.<String>emptyList(), null,
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Arrays.<JavaFileObject>asList(new JavaSource(uri, content)));
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Iterable<? extends CompilationUnitTree> trees = task.parse();
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Iterator<? extends CompilationUnitTree> iter = trees.iterator();
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if (!iter.hasNext())
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throw new Error("no trees found");
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JCCompilationUnit t = (JCCompilationUnit) iter.next();
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if (iter.hasNext())
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throw new Error("too many trees found");
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return t;
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}
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class JavaSource extends SimpleJavaFileObject {
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private final String content;
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public JavaSource(URI uri, String content) {
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super(uri, JavaFileObject.Kind.SOURCE);
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this.content = content;
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}
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@Override
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public CharSequence getCharContent(boolean ignoreEncodingErrors) {
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return content;
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}
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}
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/**
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* Report an error. When the program is complete, the program will either
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* exit or throw an Error if any errors have been reported.
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* @param msg the error message
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*/
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void error(String msg) {
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System.err.println(msg);
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errors++;
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}
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/** Number of files that have been analyzed. */
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int fileCount;
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/** Number of errors reported. */
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int errors;
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}
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class TestCase {
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String str1;
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String str2;
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public TestCase() {
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super();
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super.hashCode();
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}
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public TestCase(String str1, String str2) {
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super();
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this.str1 = str1;
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this.str2 = str2;
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assert true;
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}
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void newClass() {
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new String();
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new String();
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}
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void localVars() {
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String str1 = "";
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String str2;
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String str3;
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final String str4;
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}
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void throwsException() {
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throw new IllegalStateException();
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}
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int returnWithExpression() {
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return 1;
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}
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void returnWithoutExpression() {
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return ;
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}
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void doWhileBreakContinue() {
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do {
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if (true)
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break;
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if (false)
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continue;
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} while(true);
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}
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void labelled() {
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LABEL: doWhileBreakContinue();
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}
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}
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