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test/tools/javac/6567415/T6567415.java@2eb010b6cb22 (annotated)

test/tools/javac/6567415/T6567415.java

Thu, 31 Aug 2017 15:17:03 +0800

author

aoqi

date

Thu, 31 Aug 2017 15:17:03 +0800

changeset 2525

2eb010b6cb22

parent 1847

988aef3a8c3a

parent 0

959103a6100f

permissions

-rw-r--r--

merge

aoqi@0	1	/*
aoqi@0	2	* Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved.
aoqi@0	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0	4	*
aoqi@0	5	* This code is free software; you can redistribute it and/or modify it
aoqi@0	6	* under the terms of the GNU General Public License version 2 only, as
aoqi@0	7	* published by the Free Software Foundation.
aoqi@0	8	*
aoqi@0	9	* This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
aoqi@0	12	* version 2 for more details (a copy is included in the LICENSE file that
aoqi@0	13	* accompanied this code).
aoqi@0	14	*
aoqi@0	15	* You should have received a copy of the GNU General Public License version
aoqi@0	16	* 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0	17	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0	18	*
aoqi@0	19	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0	20	* or visit www.oracle.com if you need additional information or have any
aoqi@0	21	* questions.
aoqi@0	22	*/
aoqi@0	23
aoqi@0	24	/*
aoqi@0	25	* @test
aoqi@0	26	* @bug 6567415
aoqi@0	27	* @summary Test to ensure javac does not go into an infinite loop, while
aoqi@0	28	* reading a classfile of a specific length.
aoqi@0	29	* @compile -XDignore.symbol.file T6567415.java
aoqi@0	30	* @run main T6567415
aoqi@0	31	* @author ksrini
aoqi@0	32	*/
aoqi@0	33
aoqi@0	34	import java.io.File;
aoqi@0	35	import java.io.FileInputStream;
aoqi@0	36	import java.io.FileOutputStream;
aoqi@0	37	import java.io.IOException;
aoqi@0	38	import java.io.PrintStream;
aoqi@0	39	import java.io.RandomAccessFile;
aoqi@0	40	import java.nio.ByteBuffer;
aoqi@0	41	import java.nio.MappedByteBuffer;
aoqi@0	42	import java.nio.channels.FileChannel;
aoqi@0	43
aoqi@0	44	/*
aoqi@0	45	* this test compiles Bar.java into a classfile and enlarges the file to the
aoqi@0	46	* magic file length, then use this mutated file on the classpath to compile
aoqi@0	47	* Foo.java which references Bar.java and Ka-boom. QED.
aoqi@0	48	*/
aoqi@0	49	public class T6567415 {
aoqi@0	50	final static String TEST_FILE_NAME = "Bar";
aoqi@0	51	final static String TEST_JAVA = TEST_FILE_NAME + ".java";
aoqi@0	52	final static String TEST_CLASS = TEST_FILE_NAME + ".class";
aoqi@0	53
aoqi@0	54	final static String TEST2_FILE_NAME = "Foo";
aoqi@0	55	final static String TEST2_JAVA = TEST2_FILE_NAME + ".java";
aoqi@0	56
aoqi@0	57	/*
aoqi@0	58	* the following is the initial buffer length set in ClassReader.java
aoqi@0	59	* thus this value needs to change if ClassReader buf length changes.
aoqi@0	60	*/
aoqi@0	61
aoqi@0	62	final static int BAD_FILE_LENGTH =
aoqi@0	63	com.sun.tools.javac.jvm.ClassReader.INITIAL_BUFFER_SIZE;
aoqi@0	64
aoqi@0	65	static void createClassFile() throws IOException {
aoqi@0	66	FileOutputStream fos = null;
aoqi@0	67	try {
aoqi@0	68	fos = new FileOutputStream(TEST_JAVA);
aoqi@0	69	PrintStream ps = new PrintStream(fos);
aoqi@0	70	ps.println("public class " + TEST_FILE_NAME + " {}");
aoqi@0	71	} finally {
aoqi@0	72	fos.close();
aoqi@0	73	}
aoqi@0	74	String cmds[] = {TEST_JAVA};
aoqi@0	75	com.sun.tools.javac.Main.compile(cmds);
aoqi@0	76	}
aoqi@0	77
aoqi@0	78	static void enlargeClassFile() throws IOException {
aoqi@0	79	File f = new File(TEST_CLASS);
aoqi@0	80	if (!f.exists()) {
aoqi@0	81	System.out.println("file not found: " + TEST_CLASS);
aoqi@0	82	System.exit(1);
aoqi@0	83	}
aoqi@0	84	File tfile = new File(f.getAbsolutePath() + ".tmp");
aoqi@0	85	f.renameTo(tfile);
aoqi@0	86
aoqi@0	87	RandomAccessFile raf = null;
aoqi@0	88	FileChannel wfc = null;
aoqi@0	89
aoqi@0	90	FileInputStream fis = null;
aoqi@0	91	FileChannel rfc = null;
aoqi@0	92
aoqi@0	93	try {
aoqi@0	94	raf = new RandomAccessFile(f, "rw");
aoqi@0	95	wfc = raf.getChannel();
aoqi@0	96
aoqi@0	97	fis = new FileInputStream(tfile);
aoqi@0	98	rfc = fis.getChannel();
aoqi@0	99
aoqi@0	100	ByteBuffer bb = MappedByteBuffer.allocate(BAD_FILE_LENGTH);
aoqi@0	101	rfc.read(bb);
aoqi@0	102	bb.rewind();
aoqi@0	103	wfc.write(bb);
aoqi@0	104	wfc.truncate(BAD_FILE_LENGTH);
aoqi@0	105	} finally {
aoqi@0	106	wfc.close();
aoqi@0	107	raf.close();
aoqi@0	108	rfc.close();
aoqi@0	109	fis.close();
aoqi@0	110	}
aoqi@0	111	System.out.println("file length = " + f.length());
aoqi@0	112	}
aoqi@0	113
aoqi@0	114	static void createJavaFile() throws IOException {
aoqi@0	115	FileOutputStream fos = null;
aoqi@0	116	try {
aoqi@0	117	fos = new FileOutputStream(TEST2_JAVA);
aoqi@0	118	PrintStream ps = new PrintStream(fos);
aoqi@0	119	ps.println("public class " + TEST2_FILE_NAME +
aoqi@0	120	" {" + TEST_FILE_NAME + " b = new " +
aoqi@0	121	TEST_FILE_NAME + " ();}");
aoqi@0	122	} finally {
aoqi@0	123	fos.close();
aoqi@0	124	}
aoqi@0	125	}
aoqi@0	126
aoqi@0	127	public static void main(String... args) throws Exception {
aoqi@0	128	createClassFile();
aoqi@0	129	enlargeClassFile();
aoqi@0	130	createJavaFile();
aoqi@0	131	Thread t = new Thread () {
aoqi@0	132	@Override
aoqi@0	133	public void run() {
aoqi@0	134	String cmds[] = {"-verbose", "-cp", ".", TEST2_JAVA};
aoqi@0	135	int ret = com.sun.tools.javac.Main.compile(cmds);
aoqi@0	136	System.out.println("test compilation returns: " + ret);
aoqi@0	137	}
aoqi@0	138	};
aoqi@0	139	t.start();
aoqi@0	140	t.join(1000*60);
aoqi@0	141	System.out.println(t.getState());
aoqi@0	142	if (t.isAlive()) {
aoqi@0	143	throw new RuntimeException("Error: compilation is looping");
aoqi@0	144	}
aoqi@0	145	}
aoqi@0	146	}