1 /*
   2  * Copyright (c) 2013, 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 package jdk.testlibrary;
  25 
  26 import java.util.ArrayList;
  27 
  28 public class JcmdBase {
  29 
  30     private static ProcessBuilder processBuilder = new ProcessBuilder();
  31 
  32     /**
  33      * Attach jcmd to the current process
  34      *
  35      * @param commandArgs
  36      *            jcmd command line parameters, e.g. JFR.start
  37      * @return jcmd output
  38      * @throws Exception
  39      */
  40     public final static OutputAnalyzer jcmd(String... commandArgs)
  41             throws Exception {
  42         ArrayList<String> cmd = new ArrayList<String>();
  43         String cmdString = "";
  44 
  45         // jcmd from the jdk to be tested
  46         String jcmdPath = JdkFinder.getTool("jcmd", false);
  47         cmd.add(jcmdPath);
  48         cmdString += jcmdPath;
  49 
  50         String pid = Integer.toString(ProcessTools.getProcessId());
  51         cmd.add(pid);
  52         cmdString += " " + pid;
  53 
  54         for (int i = 0; i < commandArgs.length; i++) {
  55             cmd.add(commandArgs[i]);
  56             cmdString += " " + commandArgs[i];
  57         }
  58 
  59         // Log command line for debugging purpose
  60         System.out.println("Command line:");
  61         System.out.println(cmdString);
  62 
  63         processBuilder.command(cmd);
  64         OutputAnalyzer output = new OutputAnalyzer(processBuilder.start());
  65 
  66         // Log output for debugging purpose
  67         System.out.println("Command output:");
  68         System.out.println(output.getOutput());
  69 
  70         if (output.getExitValue() != 0) {
  71             throw new Exception(processBuilder.command()
  72                     + " resulted in exit value " + output.getExitValue()
  73                     + " , expected to get 0");
  74         }
  75 
  76         return output;
  77     }
  78 
  79 }