/*

 * Copyright (c) 2015, 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.

 */

import java.util.ArrayList;

import java.util.List;

import jdk.test.lib.Platform;

import jdk.test.lib.ProcessTools;

import jdk.test.lib.OutputAnalyzer;

import jdk.test.lib.Utils;

import jdk.test.lib.apps.LingeredApp;

/*

 * @test

 * @library /testlibrary

 * @build jdk.test.lib.*

 * @build jdk.test.lib.apps.*

 * @run main TestClassLoaderStats

 */

public class TestClassLoaderStats {

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

        if (!Platform.shouldSAAttach()) {

            System.out.println("SA attach not expected to work - test skipped.");

            return;

        }

        LingeredApp app = null;

        try {

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

            vmArgs.add("-XX:+UsePerfData");

            vmArgs.addAll(Utils.getVmOptions());

            app = LingeredApp.startApp(vmArgs);

            System.out.println("Attaching sun.jvm.hotspot.tools.ClassLoaderStats to " + app.getPid());

            ProcessBuilder processBuilder = ProcessTools.createJavaProcessBuilder(

                    "-XX:+UsePerfData",

                    "sun.jvm.hotspot.tools.ClassLoaderStats",

                    Long.toString(app.getPid()));

            OutputAnalyzer output = ProcessTools.executeProcess(processBuilder);

            System.out.println(output.getOutput());

            output.shouldHaveExitValue(0);

            output.shouldContain("Debugger attached successfully.");

            // The class loader stats header needs to be presented in the output:

            output.shouldMatch("class_loader\\W+classes\\W+bytes\\W+parent_loader\\W+alive?\\W+type");

            output.stderrShouldNotMatch("[E|e]xception");

            output.stderrShouldNotMatch("[E|e]rror");

        } finally {

            LingeredApp.stopApp(app);

        }

    }

}