1 /*

     2  * Copyright (c) 2018, 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 8198908

    27  * @summary Check that preview minor version and --enable-preview are handled

    28  *          correctly.

    29  * @modules java.base/jdk.internal.misc

    30  * @library /test/lib

    31  * @run main PreviewVersion

    32  */

    33 

    34 import java.io.File;

    35 import jdk.test.lib.compiler.InMemoryJavaCompiler;

    36 import jdk.test.lib.ByteCodeLoader;

    37 import jdk.test.lib.process.OutputAnalyzer;

    38 import jdk.test.lib.process.ProcessTools;

    39 

    40 public class PreviewVersion {

    41 

    42     public static void main(String args[]) throws Throwable {

    43         System.out.println("Regression test for bug 8198908");

    44 

    45         byte klassbuf[] = InMemoryJavaCompiler.compile("PVTest",

    46             "public class PVTest { " +

    47                 "public static void main(String argv[]) { " +

    48                     "System.out.println(\"Hi!\"); } }");

    49 

    50         // Set class's minor version to 65535.

    51         klassbuf[4] = -1;

    52         klassbuf[5] = -1;

    53 

    54         // Run the test. This should fail because --enable-preview is not specified.

    55         ClassFileInstaller.writeClassToDisk("PVTest", klassbuf, System.getProperty("test.classes"));

    56         ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(

    57             "-cp", "." + File.pathSeparator + System.getProperty("test.classes"), "PVTest");

    58         OutputAnalyzer oa = new OutputAnalyzer(pb.start());

    59         oa.shouldContain("Preview features are not enabled");

    60         oa.shouldHaveExitValue(1);

    61 

    62         // This should be successful because --enable-preview is specified.

    63         pb = ProcessTools.createJavaProcessBuilder("--enable-preview",

    64             "-cp", "." + File.pathSeparator + System.getProperty("test.classes"), "PVTest");

    65         oa = new OutputAnalyzer(pb.start());

    66         oa.shouldContain("Hi!");

    67 

    68         // Test -Xlog:class+preview

    69         pb = ProcessTools.createJavaProcessBuilder("--enable-preview", "-Xlog:class+preview",

    70             "-cp", "." + File.pathSeparator + System.getProperty("test.classes"), "PVTest");

    71         oa = new OutputAnalyzer(pb.start());

    72         oa.shouldContain("[info][class,preview] Loading preview feature type PVTest");

    73 

    74         // Subtract 1 from class's major version.  The class should fail to load

    75         // because its major_version does not match the JVM current version.

    76         int prev_major_version = Runtime.version().feature() - 1;

    77         klassbuf[6] = (byte)((prev_major_version >> 8) & 0xff);

    78         klassbuf[7] = (byte)(prev_major_version & 0xff);

    79         try {

    80             ByteCodeLoader.load("PVTest", klassbuf);

    81             throw new RuntimeException("UnsupportedClassVersionError exception not thrown");

    82         } catch (java.lang.UnsupportedClassVersionError e) {

    83             if (!e.getMessage().contains("compiled with preview features that are unsupported")) {

    84                 throw new RuntimeException(

    85                     "Wrong UnsupportedClassVersionError exception: " + e.getMessage());

    86             }

    87         }

    88 

    89         // Set class's major version to 45.  The class should load because class

    90         // version 45.65535 is valid.

    91         klassbuf[6] = 0;

    92         klassbuf[7] = 45;

    93         try {

    94             ByteCodeLoader.load("PVTest", klassbuf);

    95         } catch (java.lang.UnsupportedClassVersionError e) {

    96             throw new RuntimeException(

    97                 "Unexpected UnsupportedClassVersionError exception thrown: " + e.getMessage());

    98         }

    99 

   100         // Check that a class with a recent older major version and a non-zero

   101         // minor version fails to load.

   102         klassbuf[6] = 0;

   103         klassbuf[7] = 53;

   104         klassbuf[4] = 0;

   105         klassbuf[5] = 2;

   106         try {

   107             ByteCodeLoader.load("PVTest", klassbuf);

   108             throw new RuntimeException("UnsupportedClassVersionError exception not thrown");

   109         } catch (java.lang.UnsupportedClassVersionError e) {

   110             if (!e.getMessage().contains("was compiled with an invalid non-zero minor version")) {

   111                 throw new RuntimeException(

   112                     "Wrong UnsupportedClassVersionError exception: " + e.getMessage());

   113             }

   114         }

   115     }

   116 }