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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

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 * 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 ClassLoadUnloadTest

 * @bug 8142506

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

 * @library /test/lib /runtime/testlibrary

 * @library classes

 * @build test.Empty

 * @run driver ClassLoadUnloadTest

 */

import jdk.test.lib.process.ProcessTools;

import jdk.test.lib.process.OutputAnalyzer;

import java.lang.ref.WeakReference;

import java.lang.reflect.Method;

import java.util.ArrayList;

import java.util.Collections;

import java.util.List;

public class ClassLoadUnloadTest {

    private static OutputAnalyzer out;

    private static ProcessBuilder pb;

    private static class ClassUnloadTestMain {

        public static void main(String... args) throws Exception {

            String className = "test.Empty";

            ClassLoader cl = ClassUnloadCommon.newClassLoader();

            Class<?> c = cl.loadClass(className);

            cl = null; c = null;

            ClassUnloadCommon.triggerUnloading();

        }

    }

    static void checkFor(String... outputStrings) throws Exception {

        out = new OutputAnalyzer(pb.start());

        for (String s: outputStrings) {

            out.shouldContain(s);

        }

        out.shouldHaveExitValue(0);

    }

    static void checkAbsent(String... outputStrings) throws Exception {

        out = new OutputAnalyzer(pb.start());

        for (String s: outputStrings) {

            out.shouldNotContain(s);

        }

        out.shouldHaveExitValue(0);

    }

    // Use the same command-line heap size setting as ../ClassUnload/UnloadTest.java

    static ProcessBuilder exec(String... args) throws Exception {

        List<String> argsList = new ArrayList<>();

        Collections.addAll(argsList, args);

        Collections.addAll(argsList, "-Xmn8m");

        Collections.addAll(argsList, "-Dtest.classes=" + System.getProperty("test.classes","."));

        Collections.addAll(argsList, ClassUnloadTestMain.class.getName());

        return ProcessTools.createJavaProcessBuilder(argsList.toArray(new String[argsList.size()]));

    }

    public static void main(String... args) throws Exception {

        //  -Xlog:class+unload=info

        pb = exec("-Xlog:class+unload=info");

        checkFor("[class,unload]", "unloading class");

        //  -Xlog:class+unload=off

        pb = exec("-Xlog:class+unload=off");

        checkAbsent("[class,unload]");

        //  -XX:+TraceClassUnloading

        pb = exec("-XX:+TraceClassUnloading");

        checkFor("[class,unload]", "unloading class");

        //  -XX:-TraceClassUnloading

        pb = exec("-XX:-TraceClassUnloading");

        checkAbsent("[class,unload]");

        //  -Xlog:class+load=info

        pb = exec("-Xlog:class+load=info");

        checkFor("[class,load]", "java.lang.Object", "source:");

        //  -Xlog:class+load=debug

        pb = exec("-Xlog:class+load=debug");

        checkFor("[class,load]", "java.lang.Object", "source:", "klass:", "super:", "loader:", "bytes:");

        //  -Xlog:class+load=off

        pb = exec("-Xlog:class+load=off");

        checkAbsent("[class,load]");

        //  -XX:+TraceClassLoading

        pb = exec("-XX:+TraceClassLoading");

        checkFor("[class,load]", "java.lang.Object", "source:");

        //  -XX:-TraceClassLoading

        pb = exec("-XX:-TraceClassLoading");

        checkAbsent("[class,load]");

        //  -verbose:class

        pb = exec("-verbose:class");

        checkFor("[class,load]", "java.lang.Object", "source:");

        checkFor("[class,unload]", "unloading class");

        //  -Xlog:class+loader+data=trace

        pb = exec("-Xlog:class+loader+data=trace");

        checkFor("[class,loader,data]", "create class loader data");

    }

}