/*

 * Copyright (c) 2018, Amazon and/or its affiliates. All rights reserved.

 * Copyright (c) 2019, Azul Systems, Inc. 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 8231584

 * @library /test/lib

 * @run main/othervm LoadLibraryTest

 */

import java.nio.file.FileSystems;

import java.nio.file.Files;

import java.nio.file.Paths;

import java.nio.file.Path;

import java.net.MalformedURLException;

import java.net.URLClassLoader;

import java.net.URL;

import jdk.test.lib.compiler.CompilerUtils;

public class LoadLibraryTest {

    static Thread thread1 = null;

    static Thread thread2 = null;

    static volatile boolean thread1Ready = false;

    private static final String TEST_SRC = System.getProperty("test.src");

    private static final Path SRC_DIR = Paths.get(TEST_SRC, "src");

    private static final Path CLS_DIR = Paths.get("classes");

    static TestClassLoader loader;

    static void someLibLoad() {

        try {

/*

            FileSystems.getDefault();

            // jdk/jdk: loads directly from Bootstrap Classloader (doesn't take lock on Runtime)

            java.net.NetworkInterface.getNetworkInterfaces();

            System.out.println(jdk.net.ExtendedSocketOptions.SO_FLOW_SLA);

*/

            Class c = Class.forName("Target2", true, loader);

        } catch (Exception e) {

            throw new RuntimeException(e);

        }

    }

    static class TestClassLoader extends URLClassLoader {

        boolean passed = false;

        public boolean passed() {

            return passed;

        }

        TestClassLoader() throws MalformedURLException {

            super(new URL[] { new URL("file://" + CLS_DIR.toAbsolutePath().toString() + '/') });

        }

        public String findLibrary(String name) {

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

            if ("someLibrary".equals(name)) {

                try {

                    synchronized(thread1) {

                        while(!thread1Ready) {

                            thread1.wait();

                        }

                        thread1.notifyAll();

                    }

                    Thread.sleep(10000);

                    System.out.println("Thread2 load");

                    someLibLoad();

                    // no deadlock happened

                    passed = true;

                } catch (Exception e) {

                    throw new RuntimeException(e);

                }

                return null;

            }

            return super.findLibrary(name);

        }

    }

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

        loader = new TestClassLoader();

        if (!CompilerUtils.compile(SRC_DIR, CLS_DIR)) {

            throw new Exception("Can't compile");

        }

        thread1 = new Thread() {

            public void run() {

                try {

                    synchronized(this) {

                        thread1Ready = true;

                        thread1.notifyAll();

                        thread1.wait();

                    }

                } catch(InterruptedException e) {

                    throw new RuntimeException(e);

                }

                System.out.println("Thread1 load");

                someLibLoad();

            };

        };

        thread2 = new Thread() {

            public void run() {

                try {

                    Class c = Class.forName("Target", true, loader);

                    System.out.println(c);

                } catch (Exception e) {

                    throw new RuntimeException(e);

                }

            };

        };

        thread1.setDaemon(true);

        thread2.setDaemon(true);

        thread1.start();

        thread2.start();

        thread1.join();

        thread2.join();

        if (!loader.passed()) {

            throw new RuntimeException("FAIL");

        }

    }

}