1 /*
   2  * Copyright (c) 2006, 2017, 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 8188870
  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 10 -target 11 T1.java
  36  * @compile -source 10 -target 11 T2.java
  37  * @run main/othervm T6330997
  38  */
  39 
  40 import java.nio.*;
  41 import java.io.*;
  42 import java.nio.channels.*;
  43 
  44 import com.sun.tools.javac.api.JavacTaskImpl;
  45 import com.sun.tools.javac.code.ClassFinder.BadClassFile;
  46 import com.sun.tools.javac.code.Symtab;
  47 import com.sun.tools.javac.main.JavaCompiler;
  48 import javax.tools.ToolProvider;
  49 
  50 public 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 }