/*

 * 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.

 *

 */

import java.lang.instrument.ClassDefinition;

import java.lang.instrument.Instrumentation;

import java.lang.instrument.UnmodifiableClassException;

import java.net.URL;

import java.net.URLClassLoader;

import java.io.File;

import java.security.CodeSigner;

import java.security.CodeSource;

import java.security.ProtectionDomain;

import sun.hotspot.WhiteBox;

public class RedefineClassApp {

    static WhiteBox wb = WhiteBox.getWhiteBox();

    public static interface Intf {            // Loaded from Boot class loader (-Xbootclasspath/a).

        public String get();

    }

    public static class Bar implements Intf { // Loaded from Boot class loader.

        public String get() {

            return "buzz";

        }

    }

    public static class Foo implements Intf { // Loaded from AppClassLoader

        public String get() {

            return "buzz";

        }

    }

    static int numTests = 0;

    static int failed = 0;

    static Instrumentation instrumentation;

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

        if (wb.areSharedStringsIgnored()) {

          System.out.println("Shared strings are ignored.");

          return;

        }

        File bootJar = new File(args[0]);

        File appJar  = new File(args[1]);

        instrumentation = InstrumentationRegisterClassFileTransformer.getInstrumentation();

        System.out.println("INFO: instrumentation = " + instrumentation);

        testBootstrapCDS("Bootstrap Loader", bootJar);

        testAppCDSv1("Application Loader", appJar);

        if (failed > 0) {

            throw new RuntimeException("FINAL RESULT: " + failed + " out of " + numTests + " test case(s) have failed");

        } else {

            System.out.println("FINAL RESULT: All " + numTests + " test case(s) have passed!");

        }

        // Full GC. The cached objects in adjustable archive heap regions are

        // scanned. The archive regions are verified. No error should be

        // reported.

        wb.fullGC();

    }

    static void testBootstrapCDS(String group, File jar) throws Throwable {

        doTest(group, new Bar(), jar);

    }

    static void testAppCDSv1(String group, File jar) throws Throwable {

        doTest(group, new Foo(), jar);

    }

    static void checkArchivedMirrorObject(Class klass) {

        if (wb.areOpenArchiveHeapObjectsMapped()) {

            if (!wb.isShared(klass)) {

                failed ++;

                System.out.println("FAILED. " + klass + " mirror object is not archived");

                return;

            }

        }

    }

    static void doTest(String group, Intf object, File jar) throws Throwable {

        numTests ++;

        Class klass = object.getClass();

        System.out.println();

        System.out.println("++++++++++++++++++++++++++");

        System.out.println("Test group: " + group);

        System.out.println("Testing with classloader = " + klass.getClassLoader());

        System.out.println("Testing with class       = " + klass);

        System.out.println("Test is shared           = " + wb.isSharedClass(klass));

        System.out.println("++++++++++++++++++++++++++");

        // Check archived mirror object before redefine

        checkArchivedMirrorObject(klass);

        // Call get() before redefine. All strings in archived classes are shared.

        String res = object.get();

        System.out.println("get() returns " + res);

        if (res.equals("buzz") && wb.isShared(res)) {

            System.out.println("get() returns " + res + ", string is shared");

        } else {

            if (!res.equals("buzz")) {

                System.out.println("FAILED. buzz is expected but got " + res);

            } else {

                System.out.println("FAILED. " + res + " is not shared");

            }

            failed ++;

            return;

        }

        res = null; // release the local reference to the string

        // Run GC

        System.gc();

        System.gc();

        System.gc();

        // Redefine the shared class

        byte[] buff = Util.getClassFileFromJar(jar, klass.getName());

        Util.replace(buff, "buzz", "huzz");

        String f = "(failed)";

        try {

            instrumentation.redefineClasses(new ClassDefinition(klass, buff));

            f = object.get();

        } catch (UnmodifiableClassException|UnsupportedOperationException e) {

            e.printStackTrace();

        }

        if (f.equals("huzz")) {

            System.out.println("PASSED: object.get() after redefinition returns " + f);

        } else {

            System.out.println("FAILED: object.get() after redefinition returns " + f);

            failed ++;

        }

        // Run GC. Should not crash.

        System.gc();

        System.gc();

        System.gc();

        // Check archived mirror object after redefine and GC

        checkArchivedMirrorObject(klass);

        System.out.println("++++++++++++++++++++++++++++++++++++++++++++++++ (done)\n\n");

    }

}