/*

 * Copyright (c) 2007, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

/**

 * @test

 * @bug 6490436

 * @summary Verify that protected constructor calls are not allowed for classfile version >= 50 (but that they are allowed for lesser versions).

 * @author Keith McGuigan

 */

public class VerifyProtectedConstructor extends ClassLoader {

  public static void main(String argv[]) throws Exception {

    VerifyProtectedConstructor t = new VerifyProtectedConstructor();

    t.loadSuperClass();

    try {

      t.checkClassVersion(49); // should not throw VerifyError

    }

    catch(VerifyError e) {

       throw new Exception("FAIL: should be no VerifyError for CF version 49");

    }

    try {

      t.checkClassVersion(50); // should throw VerifyError

      throw new Exception("FAIL: should be a VerifyError for CF version 50");

    }

    catch(VerifyError e) {

       System.out.println("PASS");

    }

  }

  private void loadSuperClass() {

    /* -- code for super class A.A --

       package A;

       public class A {

         protected A() {}

       }

    */

    long[] cls_data = {

      0xcafebabe00000032L, 0x000a0a0003000707L,

      0x0008070009010006L, 0x3c696e69743e0100L,

      0x0328295601000443L, 0x6f64650c00040005L,

      0x010003412f410100L, 0x106a6176612f6c61L,

      0x6e672f4f626a6563L, 0x7400210002000300L,

      0x0000000001000400L, 0x0400050001000600L,

      0x0000110001000100L, 0x0000052ab70001b1L,

      0x0000000000000000L // 2 bytes extra

    };

    final int EXTRA = 2;

    byte cf_bytes[] = toByteArray(cls_data);

    defineClass("A.A", cf_bytes, 0, cf_bytes.length - EXTRA);

  }

  private int num_calls;

  private static String classNames[] = { "B.B", "C.C" };

  private void checkClassVersion(int version) throws VerifyError {

    // This class is in violation of the spec since it accesses

    // a protected constructor of a superclass while not being in the

    // same package.

    /* -- code for test class --

        package B;

        public class B extends A.A {

          public static void f() { new A.A(); }

        }

    */

    long[] cls_data = {

      0xcafebabe00000032L, 0x000b0a0002000807L,

      0x000907000a010006L, 0x3c696e69743e0100L,

      0x0328295601000443L, 0x6f6465010001660cL,

      0x0004000501000341L, 0x2f41010003422f42L,

      0x0021000300020000L, 0x0000000200010004L,

      0x0005000100060000L, 0x0011000100010000L,

      0x00052ab70001b100L, 0x0000000009000700L,

      0x0500010006000000L, 0x1500020000000000L,

      0x09bb000259b70001L, 0x57b1000000000000L // no extra bytes

    };

    final int EXTRA = 0;

    byte cf_bytes[] = toByteArray(cls_data);

    // set version

    cf_bytes[7] = (byte)version;

    // Change B.B to C.C, D.D, ... for subsequent calls so we can call this

    // multiple times and define different classes.

    cf_bytes[61] += num_calls;

    cf_bytes[63] += num_calls;

    String name = classNames[num_calls];

    num_calls++;

    Class c = defineClass(name, cf_bytes, 0, cf_bytes.length - EXTRA);

    try { c.newInstance(); } // to force linking, thus verification

    catch(InstantiationException e) {}

    catch(IllegalAccessException e) {}

  }

  static private byte[] toByteArray(long arr[]) {

    // convert long array to byte array

    java.nio.ByteBuffer bbuf = java.nio.ByteBuffer.allocate(arr.length * 8);

    bbuf.asLongBuffer().put(java.nio.LongBuffer.wrap(arr));

    return bbuf.array();

  }

}