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test/tools/javac/T6999210.java@7909abb85562 (annotated)

test/tools/javac/T6999210.java

Wed, 14 Nov 2018 10:18:25 -0800

author

diazhou

date

Wed, 14 Nov 2018 10:18:25 -0800

changeset 3762

7909abb85562

parent 0

959103a6100f

permissions

-rw-r--r--

Added tag jdk8u201-b04 for changeset a7f48b9dfb82

aoqi@0	1	/*
aoqi@0	2	* Copyright (c) 2010, 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 6999210
aoqi@0	27	* @summary javac should be able to warn of anomalous conditions in classfiles
aoqi@0	28	*/
aoqi@0	29
aoqi@0	30	import java.io.*;
aoqi@0	31	import java.util.*;
aoqi@0	32
aoqi@0	33	public class T6999210 {
aoqi@0	34	public static void main(String... args) throws Exception {
aoqi@0	35	new T6999210().run();
aoqi@0	36	}
aoqi@0	37
aoqi@0	38	void run() throws Exception {
aoqi@0	39	File srcDir = new File("src");
aoqi@0	40	File classesDir = new File("classes");
aoqi@0	41	classesDir.mkdirs();
aoqi@0	42
aoqi@0	43	File c_java = writeFile(srcDir, "C.java", "class C<T> { }");
aoqi@0	44	compile("-d", classesDir.getPath(), c_java.getPath());
aoqi@0	45	File c_class = new File(classesDir, "C.class");
aoqi@0	46	setMajorVersion(c_class, 48);
aoqi@0	47	File d_java = writeFile(srcDir, "D.java", "class D { C c; }");
aoqi@0	48
aoqi@0	49	// verify no warning if -Xlint:classfile not enabled
aoqi@0	50	String out1 = compile(
aoqi@0	51	"-d", classesDir.getPath(),
aoqi@0	52	"-classpath", classesDir.getPath(),
aoqi@0	53	d_java.getPath());
aoqi@0	54	if (out1.length() > 0)
aoqi@0	55	error("unexpected output from javac");
aoqi@0	56
aoqi@0	57	// sanity check of warning when -XDrawDiagnostics not used
aoqi@0	58	String out2 = compile(
aoqi@0	59	"-d", classesDir.getPath(),
aoqi@0	60	"-classpath", classesDir.getPath(),
aoqi@0	61	"-Xlint:classfile",
aoqi@0	62	d_java.getPath());
aoqi@0	63	if (!out2.contains("[classfile]"))
aoqi@0	64	error("expected output \"[classfile]\" not found");
aoqi@0	65
aoqi@0	66	// check specific details, using -XDrawDiagnostics
aoqi@0	67	String out3 = compile(
aoqi@0	68	"-d", classesDir.getPath(),
aoqi@0	69	"-classpath", classesDir.getPath(),
aoqi@0	70	"-Xlint:classfile", "-XDrawDiagnostics",
aoqi@0	71	d_java.getPath());
aoqi@0	72	String expect = "C.class:-:-: compiler.warn.future.attr: Signature, 49, 0, 48, 0";
aoqi@0	73	if (!out3.contains(expect))
aoqi@0	74	error("expected output \"" + expect + "\" not found");
aoqi@0	75
aoqi@0	76	if (errors > 0)
aoqi@0	77	throw new Exception(errors + " errors occurred");
aoqi@0	78	}
aoqi@0	79
aoqi@0	80	String compile(String... args) throws Exception {
aoqi@0	81	System.err.println("compile: " + Arrays.asList(args));
aoqi@0	82	StringWriter sw = new StringWriter();
aoqi@0	83	PrintWriter pw = new PrintWriter(sw);
aoqi@0	84	int rc = com.sun.tools.javac.Main.compile(args, pw);
aoqi@0	85	pw.close();
aoqi@0	86	String out = sw.toString();
aoqi@0	87	if (out.length() > 0)
aoqi@0	88	System.err.println(out);
aoqi@0	89	if (rc != 0)
aoqi@0	90	throw new Exception("compilation failed, rc=" + rc);
aoqi@0	91	return out;
aoqi@0	92	}
aoqi@0	93
aoqi@0	94	void setMajorVersion(File f, int major) throws IOException {
aoqi@0	95	int len = (int) f.length();
aoqi@0	96	byte[] data = new byte[len];
aoqi@0	97	try (DataInputStream in = new DataInputStream(new FileInputStream(f))) {
aoqi@0	98	in.readFully(data);
aoqi@0	99	}
aoqi@0	100	// u4 magic
aoqi@0	101	// u2 minor
aoqi@0	102	data[6] = (byte) (major >> 8);
aoqi@0	103	data[7] = (byte) (major & 0xff);
aoqi@0	104	try (FileOutputStream out = new FileOutputStream(f)) {
aoqi@0	105	out.write(data);
aoqi@0	106	}
aoqi@0	107	}
aoqi@0	108
aoqi@0	109	File writeFile(File dir, String path, String body) throws IOException {
aoqi@0	110	File f = new File(dir, path);
aoqi@0	111	f.getParentFile().mkdirs();
aoqi@0	112	try (FileWriter out = new FileWriter(f)) {
aoqi@0	113	out.write(body);
aoqi@0	114	}
aoqi@0	115	return f;
aoqi@0	116	}
aoqi@0	117
aoqi@0	118	void error(String msg) {
aoqi@0	119	System.err.println("Error: " + msg);
aoqi@0	120	errors++;
aoqi@0	121	}
aoqi@0	122
aoqi@0	123	int errors;
aoqi@0	124	}