T6330997.java revision 3552:467ad69d5948 
1/*
2 * Copyright (c) 2006, 2016, 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     6330997 7025789 8000961
27 * @summary javac should accept class files with major version of the next release
28 * @author  Wei Tao
29 * @modules jdk.compiler/com.sun.tools.javac.api
30 *          jdk.compiler/com.sun.tools.javac.code
31 *          jdk.compiler/com.sun.tools.javac.comp
32 *          jdk.compiler/com.sun.tools.javac.main
33 *          jdk.compiler/com.sun.tools.javac.util
34 * @clean T1 T2
35 * @compile -source 9 -target 9 T1.java
36 * @compile -source 9 -target 9 T2.java
37 * @run main/othervm T6330997
38 */
39
40import java.nio.*;
41import java.io.*;
42import java.nio.channels.*;
43
44import com.sun.tools.javac.api.JavacTaskImpl;
45import com.sun.tools.javac.code.ClassFinder.BadClassFile;
46import com.sun.tools.javac.code.Symtab;
47import com.sun.tools.javac.main.JavaCompiler;
48import javax.tools.ToolProvider;
49
50public class T6330997 {
51    public static void main(String... args) {
52        increaseMajor("T1.class", 1);
53        increaseMajor("T2.class", 2);
54        javax.tools.JavaCompiler tool = ToolProvider.getSystemJavaCompiler();
55        JavacTaskImpl task = (JavacTaskImpl)tool.getTask(null, null, null, null, null, null);
56        JavaCompiler compiler = JavaCompiler.instance(task.getContext());
57        Symtab syms = Symtab.instance(task.getContext());
58        task.ensureEntered();
59        try {
60            compiler.resolveIdent(syms.unnamedModule, "T1").complete();
61        } catch (Exception e) {
62            e.printStackTrace();
63            throw new RuntimeException("Failed: unexpected exception while reading class T1");
64        }
65        try {
66            compiler.resolveIdent(syms.unnamedModule, "T2").complete();
67        } catch (BadClassFile e) {
68            System.err.println("Passed: expected completion failure " + e.getClass().getName());
69            return;
70        } catch (Exception e) {
71            e.printStackTrace();
72            throw new RuntimeException("Failed: unexpected exception while reading class T2");
73        }
74        throw new RuntimeException("Failed: no error reported");
75    }
76
77    // Increase class file cfile's major version by delta
78    static void increaseMajor(String cfile, int delta) {
79        try (RandomAccessFile cls =
80             new RandomAccessFile(new File(System.getProperty("test.classes", "."), cfile), "rw");
81             FileChannel fc = cls.getChannel()) {
82            ByteBuffer rbuf = ByteBuffer.allocate(2);
83            fc.read(rbuf, 6);
84            ByteBuffer wbuf = ByteBuffer.allocate(2);
85            wbuf.putShort(0, (short)(rbuf.getShort(0) + delta));
86            fc.write(wbuf, 6);
87            fc.force(false);
88        } catch (Exception e){
89            throw new RuntimeException("Failed: unexpected exception");
90         }
91     }
92}
93