/*

 * Copyright (c) 2013, 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

 * @bug 8027572

 * @summary class unloading resets profile, method compiled after the profile is

 * first set and before class loading sets unknown bit with not recorded class

 * @library /

 * @build compiler.profiling.unloadingconflict.B

 * @run main/othervm -XX:TypeProfileLevel=222 -XX:-BackgroundCompilation

 *                   compiler.profiling.unloadingconflict.TestProfileConflictClassUnloading

 *

 */

package compiler.profiling.unloadingconflict;

import java.net.MalformedURLException;

import java.net.URL;

import java.net.URLClassLoader;

import java.nio.file.Paths;

public class TestProfileConflictClassUnloading {

    static class A {

    }

    static void m1(Object o) {

    }

    static void m2(Object o) {

        m1(o);

    }

    static void m3(A a, boolean do_call) {

        if (!do_call) {

            return;

        }

        m2(a);

    }

    public static ClassLoader newClassLoader() {

        try {

            return new URLClassLoader(new URL[] {

                    Paths.get(System.getProperty("test.classes",".")).toUri().toURL(),

            }, null);

        } catch (MalformedURLException e){

            throw new RuntimeException("Unexpected URL conversion failure", e);

        }

    }

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

        ClassLoader loader = newClassLoader();

        Object o = loader.loadClass("compiler.profiling.unloadingconflict.B").newInstance();

        // collect conflicting profiles

        for (int i = 0; i < 5000; i++) {

            m2(o);

        }

        // prepare for conflict

        A a = new A();

        for (int i = 0; i < 5000; i++) {

            m3(a, false);

        }

        // unload class in profile

        o = null;

        loader = null;

        System.gc();

        // record the conflict

        m3(a, true);

        // trigger another GC

        System.gc();

    }

}