123 lines
4.4 KiB
Java
123 lines
4.4 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 6567415
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* @summary Test to ensure javac does not go into an infinite loop, while
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* reading a classfile of a specific length.
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* @modules jdk.compiler/com.sun.tools.javac.jvm
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* @compile -XDignore.symbol.file T6567415.java
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* @run main T6567415
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* @author ksrini
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*/
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import java.io.File;
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import java.io.FileInputStream;
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import java.io.FileOutputStream;
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import java.io.IOException;
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import java.io.PrintStream;
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import java.io.RandomAccessFile;
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import java.nio.ByteBuffer;
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import java.nio.MappedByteBuffer;
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import java.nio.channels.FileChannel;
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/*
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* this test compiles Bar.java into a classfile and enlarges the file to the
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* magic file length, then use this mutated file on the classpath to compile
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* Foo.java which references Bar.java and Ka-boom. QED.
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*/
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public class T6567415 {
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final static String TEST_FILE_NAME = "Bar";
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final static String TEST_JAVA = TEST_FILE_NAME + ".java";
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final static String TEST_CLASS = TEST_FILE_NAME + ".class";
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final static String TEST2_FILE_NAME = "Foo";
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final static String TEST2_JAVA = TEST2_FILE_NAME + ".java";
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/*
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* the following is the initial buffer length set in ClassReader.java
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* thus this value needs to change if ClassReader buf length changes.
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*/
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final static int BAD_FILE_LENGTH =
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com.sun.tools.javac.jvm.ClassReader.INITIAL_BUFFER_SIZE;
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static void createClassFile() throws IOException {
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try (PrintStream ps = new PrintStream(new FileOutputStream(TEST_JAVA))) {
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ps.println("public class " + TEST_FILE_NAME + " {}");
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}
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String cmds[] = {TEST_JAVA};
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com.sun.tools.javac.Main.compile(cmds);
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}
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static void enlargeClassFile() throws IOException {
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File f = new File(TEST_CLASS);
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if (!f.exists()) {
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System.out.println("file not found: " + TEST_CLASS);
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System.exit(1);
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}
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File tfile = new File(f.getAbsolutePath() + ".tmp");
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f.renameTo(tfile);
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try (
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FileChannel wfc = new RandomAccessFile(f, "rw").getChannel();
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FileChannel rfc = new FileInputStream(tfile).getChannel()) {
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ByteBuffer bb = MappedByteBuffer.allocate(BAD_FILE_LENGTH);
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rfc.read(bb);
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bb.rewind();
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wfc.write(bb);
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wfc.truncate(BAD_FILE_LENGTH);
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}
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System.out.println("file length = " + f.length());
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}
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static void createJavaFile() throws IOException {
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try (PrintStream ps = new PrintStream(new FileOutputStream(TEST2_JAVA))) {
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ps.println("public class " + TEST2_FILE_NAME +
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" {" + TEST_FILE_NAME + " b = new " +
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TEST_FILE_NAME + " ();}");
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}
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}
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public static void main(String... args) throws Exception {
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createClassFile();
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enlargeClassFile();
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createJavaFile();
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Thread t = new Thread () {
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@Override
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public void run() {
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String cmds[] = {"-verbose", "-cp", ".", TEST2_JAVA};
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int ret = com.sun.tools.javac.Main.compile(cmds);
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System.out.println("test compilation returns: " + ret);
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}
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};
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t.start();
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t.join(1000*60);
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System.out.println(t.getState());
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if (t.isAlive()) {
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throw new RuntimeException("Error: compilation is looping");
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}
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}
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}
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