1 /*
   2  * Copyright (c) 2017, 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.
   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 /*
  25  * @test PlainRead
  26  * @requires os.family == "linux"
  27  * @library /testlibrary /test/lib
  28  * @build sun.hotspot.WhiteBox
  29  * @run driver ClassFileInstaller sun.hotspot.WhiteBox
  30  *                              sun.hotspot.WhiteBox$WhiteBoxPermission
  31  * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI PlainRead
  32  */
  33 
  34 import jdk.test.lib.process.ProcessTools;
  35 import jdk.test.lib.process.OutputAnalyzer;
  36 import jdk.test.lib.Platform;
  37 import sun.hotspot.WhiteBox;
  38 
  39 public class PlainRead {
  40 
  41     static public void match(OutputAnalyzer oa, String what, String value) {
  42        oa.shouldMatch("^.*" + what + " *" + value + ".*$");
  43     }
  44 
  45     static public void noMatch(OutputAnalyzer oa, String what, String value) {
  46        oa.shouldNotMatch("^.*" + what + " *" + value + ".*$");
  47     }
  48 
  49     static final String good_value = "(\\d+|-1|Unlimited)";
  50     static final String bad_value = "(failed)";
  51 
  52     static final String[] variables = {"Memory Limit is:", "CPU Shares is:", "CPU Quota is:", "CPU Period is:", "active_processor_count:"};
  53 
  54     static public void isContainer(OutputAnalyzer oa) {
  55         for (String v: variables) {
  56             match(oa, v, good_value);
  57         }
  58         for (String v: variables) {
  59             noMatch(oa, v, bad_value);
  60         }
  61     }
  62 
  63     static public void isNotContainer(OutputAnalyzer oa) {
  64        oa.shouldMatch("^.*Can't open /proc/self/mountinfo.*$");
  65     }
  66 
  67     public static void main(String[] args) throws Exception {
  68         WhiteBox wb = WhiteBox.getWhiteBox();
  69         ProcessBuilder pb = ProcessTools.createJavaProcessBuilder("-Xlog:os+container=trace", "-version");
  70         OutputAnalyzer output = new OutputAnalyzer(pb.start());
  71 
  72         if (wb.isContainerized()) {
  73             System.out.println("Inside a cgroup, testing...");
  74             isContainer(output);
  75         }
  76     }
  77 }