1 /*
   2  * Copyright (c) 2018, 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.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package jdk.jfr.jvm;
  27 
  28 import static jdk.test.lib.Asserts.assertEquals;
  29 import java.lang.management.ManagementFactory;
  30 
  31 import jdk.jfr.internal.JVM;
  32 
  33 /**
  34  * @test TestPid
  35  * @key jfr
  36  * 
  37  * @library /lib /
  38  * 
  39  * @run main/othervm jdk.jfr.jvm.TestPid
  40  */
  41 public class TestPid {
  42 
  43     private static long getProcessId() {
  44 
  45         // something like '<pid>@<hostname>', at least in SUN / Oracle JVMs
  46         final String jvmName = ManagementFactory.getRuntimeMXBean().getName();
  47 
  48         final int index = jvmName.indexOf('@');
  49 
  50         if (index < 1) {
  51             // part before '@' empty (index = 0) / '@' not found (index = -1)
  52             return 42;
  53         }
  54 
  55         try {
  56             return Long.parseLong(jvmName.substring(0, index));
  57         } catch (NumberFormatException e) {
  58             // ignore
  59         }
  60         return 42;
  61     }
  62 
  63     public static void main(String... args) throws InterruptedException {
  64 
  65         JVM jvm = JVM.getJVM();
  66         String pid = jvm.getPid();
  67 
  68         try {
  69             String managementPid = String.valueOf(getProcessId());
  70             assertEquals(pid, managementPid, "Pid doesn't match value returned by RuntimeMXBean");
  71         } catch (NumberFormatException nfe) {
  72             throw new AssertionError("Pid must be numeric, but was '" + pid + "'");
  73         }
  74     }
  75 
  76 }