/*

 * Copyright (c) 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.

 *

 * 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

 * @library /test/lib

 * @summary Test that retransforming and redefining anonymous classes gets UnmodifiableClassException

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

 * @modules java.instrument

 *          jdk.jartool/sun.tools.jar

 * @run main ModifyAnonymous buildagent

 * @run main/othervm -javaagent:redefineagent.jar ModifyAnonymous

 */

import java.io.FileNotFoundException;

import java.io.PrintWriter;

import java.lang.RuntimeException;

import java.lang.instrument.ClassDefinition;

import java.lang.instrument.ClassFileTransformer;

import java.lang.instrument.IllegalClassFormatException;

import java.lang.instrument.Instrumentation;

import java.security.ProtectionDomain;

import jdk.test.lib.compiler.InMemoryJavaCompiler;

public class ModifyAnonymous {

    public static class LambdaTransformer implements ClassFileTransformer {

        @Override

        public byte[] transform(ClassLoader loader, String className, Class<?> classBeingRedefined,

                                ProtectionDomain protectionDomain, byte[] classfileBuffer)

        throws IllegalClassFormatException {

            return null;

        }

    }

    static Instrumentation inst = null;

    static volatile boolean done = false;

    public static void premain(String args, Instrumentation instrumentation) {

        inst = instrumentation;

        System.out.println("javaagent in da house!");

        instrumentation.addTransformer(new LambdaTransformer());

    }

    private static void buildAgent() {

        try {

            ClassFileInstaller.main("ModifyAnonymous");

        } catch (Exception e) {

            throw new RuntimeException("Could not write agent classfile", e);

        }

        try {

            PrintWriter pw = new PrintWriter("MANIFEST.MF");

            pw.println("Premain-Class: ModifyAnonymous");

            pw.println("Agent-Class: ModifyAnonymous");

            pw.println("Can-Retransform-Classes: true");

            pw.println("Can-Redefine-Classes: true");

            pw.close();

        } catch (FileNotFoundException e) {

            throw new RuntimeException("Could not write manifest file for the agent", e);

        }

        sun.tools.jar.Main jarTool = new sun.tools.jar.Main(System.out, System.err, "jar");

        if (!jarTool.run(new String[] { "-cmf", "MANIFEST.MF", "redefineagent.jar", "ModifyAnonymous.class" })) {

            throw new RuntimeException("Could not write the agent jar file");

        }

    }

    public static class InstanceMethodCallSiteApp {

        public static void test() throws InterruptedException {

            for (int i = 0; i < 2; i++) {

                InstanceMethodCallSiteApp app = new InstanceMethodCallSiteApp();

                Runnable r = app::doWork;   // this creates an anonymous class

                while (!done) {

                    r.run();

                    Thread.sleep(10);

                }

            }

        }

        public void doWork() {

            System.out.print(".");

        }

    }

    static void runTest() {

        while (!done) {

            Class[] allLoadedClasses = inst.getAllLoadedClasses();

            for (Class clazz : allLoadedClasses) {

                final String name = clazz.getName();

                if (name.contains("$$Lambda$") && name.contains("App")) {

                    if (inst.isModifiableClass(clazz)) {

                        throw new RuntimeException ("Class should not be modifiable");

                    }

                    // Try to modify them anyway.

                    try {

                        System.out.println("retransform called for " + name);

                        inst.retransformClasses(clazz);

                    } catch(java.lang.instrument.UnmodifiableClassException t) {

                        System.out.println("PASSED: expecting UnmodifiableClassException");

                        t.printStackTrace();

                    }

                    try {

                        System.out.println("redefine called for " + name);

                        String newclass = "class Dummy {}";

                        byte[] bytecode = InMemoryJavaCompiler.compile("Dummy", newclass);

                        ClassDefinition cld = new ClassDefinition(clazz, bytecode);

                        inst.redefineClasses(new ClassDefinition[] { cld });

                    } catch(java.lang.instrument.UnmodifiableClassException t) {

                        System.out.println("PASSED: expecting UnmodifiableClassException");

                        t.printStackTrace();

                    } catch(java.lang.ClassNotFoundException e) {

                        throw new RuntimeException ("ClassNotFoundException thrown");

                    }

                    done = true;

                }

            }

        }

    }

    public static void main(String argv[]) throws InterruptedException, RuntimeException {

        if (argv.length == 1 && argv[0].equals("buildagent")) {

            buildAgent();

            return;

        }

        if (inst == null) {

            throw new RuntimeException("Instrumentation object was null");

        }

        new Thread() {

            public void run() {

                runTest();

            }

        }.start();

        // Test that NCDFE is not thrown for anonymous class:

        // ModifyAnonymous$InstanceMethodCallSiteApp$$Lambda$18

        try {

            ModifyAnonymous test = new ModifyAnonymous();

            InstanceMethodCallSiteApp.test();

        } catch (NoClassDefFoundError e) {

            throw new RuntimeException("FAILED: NoClassDefFoundError thrown for " + e.getMessage());

        }

        System.out.println("PASSED: NoClassDefFound error not thrown");

    }

}