/*

 * Copyright (c) 2016, 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.

 *

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 */

/*

 * @test

 * @summary Checks that the jshdb debugd utility sucessfully starts

 *          and tries to attach to a running process

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

 * @library /test/lib/share/classes

 *

 * @run main/othervm SADebugDTest

 */

import java.io.File;

import java.util.concurrent.CountDownLatch;

import java.io.InputStreamReader;

import java.io.BufferedReader;

import java.io.Reader;

import java.util.concurrent.TimeUnit;

import java.util.function.Predicate;

import static jdk.test.lib.Asserts.assertTrue;

import static jdk.test.lib.Platform.shouldSAAttach;

import static jdk.test.lib.process.ProcessTools.startProcess;

public class SADebugDTest {

    private static final String GOLDEN = "Attaching to process ID %d and starting RMI services, please wait...";

    private static final String JAVA_HOME = (System.getProperty("test.jdk") != null)

            ? System.getProperty("test.jdk") : System.getProperty("java.home");

    private static final String JAVA_BIN_DIR

            = JAVA_HOME + File.separator + "bin" + File.separator;

    private static final String JHSDB = JAVA_BIN_DIR + "jhsdb";

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

        if (!shouldSAAttach()) {

            log("Not possible to attach the SA. Skipping the test");

            return;

        }

        long ourPid = ProcessHandle.current().getPid();

        // The string we are expecting in the debugd ouput

        String golden = String.format(GOLDEN, ourPid);

        // We are going to run 'jhsdb debugd <our pid>'

        // The startProcess will block untl the 'golden' string appears in either process' stdout or stderr

        // In case of timeout startProcess kills the debugd process

        ProcessBuilder pb = new ProcessBuilder();

        pb.command(JHSDB, "debugd", String.valueOf(ourPid));

        Process debugd = startProcess("debugd", pb, null, (line) -> line.trim().contains(golden), 0, TimeUnit.SECONDS);

        // If we are here, this means we have received the golden line and the test has passed

        // The debugd remains running, we have to kill it

        debugd.destroy();

    }

    private static void log(String string) {

        System.out.println(string);

    }

}