/*

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 * 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

 * @bug 6331574

 * @summary test isModifiableClass

 * @author Robert Field, Sun Microsystems

 *

 * @run build IsModifiableClassApp IsModifiableClassAgent

 * @run shell MakeJAR3.sh IsModifiableClassAgent 'Can-Retransform-Classes: true'

 * @run main/othervm -javaagent:IsModifiableClassAgent.jar IsModifiableClassApp

 */

import java.lang.instrument.*;

public class IsModifiableClassAgent

{

    public static boolean fail = false;

    public static boolean completed = false;

    public static void

    premain(    String agentArgs,

                Instrumentation instrumentation)

        {

            System.out.println("IsModifiableClassAgent started");

            Class[] allClasses = instrumentation.getAllLoadedClasses();

            int modCount = 0;

            int unmodCount = 0;

            for (int i = 0; i < allClasses.length; i++)

                {

                    Class klass = allClasses[i];

                    boolean isMod = instrumentation.isModifiableClass(klass);

                    if (isMod && klass.isArray()) {

                        System.err.println("Error: array class returned as modifiable: " + klass);

                        fail = true;

                    }

                    if (isMod && klass.isPrimitive()) {

                        System.err.println("Error: primitive class returned as modifiable: " + klass);

                        fail = true;

                    }

                    try {

                        instrumentation.retransformClasses(klass);

                        if (!isMod) {

                            System.err.println("Error: unmodifiable class retransformable: " + klass);

                            fail = true;

                        }

                    } catch (UnmodifiableClassException e) {

                        if (isMod) {

                            System.err.println("Error: modifiable class not retransformable: " + klass);

                            System.err.println("  exception: " + e);

                            fail = true;

                        }

                    } catch (Throwable e) {

                        System.err.println("Error: bad return from retransform: " + klass);

                        System.err.println("  ERROR: " + e);

                        fail = true;

                    }

                    if (isMod) {

                        ++modCount;

                    } else {

                        ++unmodCount;

                    }

                }

            System.out.println("modifiable: " + modCount + ". unmodifiable: " + unmodCount);

            completed = true;

        }

}