/*

 * Copyright (c) 2015, 2016, 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.

 *

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 */

/*

 * @test

 * @summary Verifies the behaviour of Unsafe.defineClass

 * @library /test/lib

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

 *          java.compiler

 *          java.management

 * @run main DefineClass

 */

import java.security.ProtectionDomain;

import java.io.InputStream;

import jdk.test.lib.InMemoryJavaCompiler;

import jdk.internal.misc.Unsafe;

import static jdk.test.lib.Asserts.*;

public class DefineClass {

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

        Unsafe unsafe = Unsafe.getUnsafe();

        TestClassLoader classloader = new TestClassLoader();

        ProtectionDomain pd = new ProtectionDomain(null, null);

        byte klassbuf[] = InMemoryJavaCompiler.compile("TestClass", "class TestClass { }");

        // Invalid class data

        try {

            unsafe.defineClass(null, klassbuf, 4, klassbuf.length - 4, classloader, pd);

            throw new RuntimeException("defineClass did not throw expected ClassFormatError");

        } catch (ClassFormatError e) {

            // Expected

        }

        // Negative offset

        try {

            unsafe.defineClass(null, klassbuf, -1, klassbuf.length, classloader, pd);

            throw new RuntimeException("defineClass did not throw expected IndexOutOfBoundsException");

        } catch (IndexOutOfBoundsException e) {

            // Expected

        }

        // Negative length

        try {

            unsafe.defineClass(null, klassbuf, 0, -1, classloader, pd);

            throw new RuntimeException("defineClass did not throw expected IndexOutOfBoundsException");

        } catch (IndexOutOfBoundsException e) {

            // Expected

        }

        // Offset greater than klassbuf.length

        try {

            unsafe.defineClass(null, klassbuf, klassbuf.length + 1, klassbuf.length, classloader, pd);

            throw new RuntimeException("defineClass did not throw expected IndexOutOfBoundsException");

        } catch (IndexOutOfBoundsException e) {

            // Expected

        }

        // Length greater than klassbuf.length

        try {

            unsafe.defineClass(null, klassbuf, 0, klassbuf.length + 1, classloader, pd);

            throw new RuntimeException("defineClass did not throw expected IndexOutOfBoundsException");

        } catch (IndexOutOfBoundsException e) {

            // Expected

        }

        Class klass = unsafe.defineClass(null, klassbuf, 0, klassbuf.length, classloader, pd);

        assertEquals(klass.getClassLoader(), classloader);

        assertEquals(klass.getProtectionDomain(), pd);

    }

    private static class TestClassLoader extends ClassLoader {

        public TestClassLoader(ClassLoader parent) {

            super(parent);

        }

        public TestClassLoader() {

            super();

        }

    }

}