1 /*

     2  * Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved.

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

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

    21  * questions.

    22  */

    23 

    24 import java.io.BufferedReader;

    25 import java.io.InputStreamReader;

    26 import java.io.IOException;

    27 

    28 import jdk.test.lib.JDKToolLauncher;

    29 

    30 

    31 public class DebugdUtils {

    32 

    33     private static final String GOLDEN = "Debugger attached";

    34 

    35     private final String id;

    36 

    37     private Process debugdProcess;

    38 

    39     public DebugdUtils(String id) {

    40         this.id = id;

    41         debugdProcess = null;

    42     }

    43 

    44     public void attach(long pid) throws IOException {

    45         JDKToolLauncher jhsdbLauncher = JDKToolLauncher.createUsingTestJDK("jhsdb");

    46         jhsdbLauncher.addToolArg("debugd");

    47         jhsdbLauncher.addToolArg("--pid");

    48         jhsdbLauncher.addToolArg(Long.toString(pid));

    49         if (id != null) {

    50             jhsdbLauncher.addToolArg("--serverid");

    51             jhsdbLauncher.addToolArg(id);

    52         }

    53         debugdProcess = (new ProcessBuilder(jhsdbLauncher.getCommand())).start();

    54 

    55         // Wait until debug server attached

    56         try (BufferedReader reader = new BufferedReader(new InputStreamReader(debugdProcess.getErrorStream()))) {

    57             String line;

    58             while ((line = reader.readLine()) != null) {

    59                 if (line.contains(GOLDEN)) {

    60                     break;

    61                 }

    62             }

    63         }

    64     }

    65 

    66     public void detach() throws InterruptedException {

    67         if (debugdProcess != null) {

    68             debugdProcess.destroy();

    69             debugdProcess.waitFor();

    70         }

    71     }

    72 }