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 }