/*

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

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 * 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

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/**

 * @test

 * @bug 8214892

 * @summary Test that the onjcmd option of the jdwp agent works.

 *

 * @author Ralf Schmelter

 *

 * @library /test/lib

 * @run compile --add-exports java.base/jdk.internal.vm=ALL-UNNAMED -g OnJcmdTest.java

 * @run main/othervm --add-exports java.base/jdk.internal.vm=ALL-UNNAMED -agentlib:jdwp=transport=dt_socket,address=localhost:0,onjcmd=y,server=y OnJcmdTest

 */

import java.lang.reflect.Method;

import java.util.Properties;

import jdk.internal.vm.VMSupport;

import jdk.test.lib.JDKToolFinder;

import jdk.test.lib.process.OutputAnalyzer;

import jdk.test.lib.process.ProcessTools;

public class OnJcmdTest {

    private static String getListenerAddress() throws Exception {

        Properties props = VMSupport.getAgentProperties();

        return props.getProperty("sun.jdwp.listenerAddress", null);

    }

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

        // First check if we get the expected errors.

        OutputAnalyzer output = ProcessTools.executeTestJvm(

                "-agentlib:jdwp=transport=dt_socket,address=any,onjcmd=y");

        output.shouldContain("Can only use onjcmd with server=y");

        output.shouldHaveExitValue(1);

        output = ProcessTools.executeTestJvm(

                "-agentlib:jdwp=transport=dt_socket,address=any,onjcmd=y,onthrow=a,launch=a");

        output.shouldContain("Cannot combine onjcmd and launch suboptions");

        output.shouldHaveExitValue(1);

        // Make sure debugging is not yet started.

        String prop = getListenerAddress();

        if (prop != null) {

            throw new RuntimeException("Listener address was set to " + prop);

        }

        // Now start it (test that it is OK to do this more than once).

        for (int i = 0; i < 3; ++i) {

            String jcmd = JDKToolFinder.getJDKTool("jcmd");

            output = ProcessTools.executeProcess(jcmd,

                    Long.toString(ProcessTools.getProcessId()),

                    "VM.start_java_debugging");

            String exp_str = i == 0 ? "Debugging has been started." :

                                      "Debugging is already active.";

            output.shouldContain(exp_str);

            output.shouldContain("Transport : dt_socket");

            output.shouldHaveExitValue(0);

        }

        // Now the property should be set, as the jdwp agent waits for a

        // connection.

        long t1 = System.currentTimeMillis();

        long t2 = t1;

        while(t2 - t1 < 4000) {

            prop = getListenerAddress();

            if (prop != null) {

                if (prop.equals("localhost:0")) {

                    throw new RuntimeException("Port was not expanded");

                } else if (!prop.startsWith("dt_socket:")) {

                    throw new RuntimeException("Invalid transport prop " + prop);

                }

                return;

            }

            Thread.sleep(50);

            t2 = System.currentTimeMillis();

        }

        throw new RuntimeException("Debugging backend didn't start");

    }

}