1 /*
   2  * Copyright (c) 2003, 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
  26  * @bug     4858522
  27  * @summary Basic unit test of OperatingSystemMXBean.getTotalSwapSpaceSize()
  28  * @author  Steve Bohne
  29  * @author  Jaroslav Bachorik
  30  *
  31  * @library /test/lib
  32  *
  33  * @run main TestTotalSwap
  34  */
  35 
  36 /*
  37  * This test tests the actual swap size on linux and solaris.
  38  * The correct value should be checked manually:
  39  * Solaris:
  40  *   1. In a shell, enter the command: "swap -l"
  41  *   2. The value (reported in blocks) is in the "blocks" column.
  42  * Linux:
  43  *   1. In a shell, enter the command: "cat /proc/meminfo"
  44  *   2. The value (reported in bytes) is in "Swap" entry, "total" column.
  45  * Windows NT/XP/2000:
  46  *   1. Run Start->Accessories->System Tools->System Information.
  47  *   2. The value (reported in Kbytes) is in the "Page File Space" entry
  48  * Windows 98/ME:
  49  *   Unknown.
  50  *
  51  * Usage: GetTotalSwapSpaceSize <expected swap size | "sanity-only"> [trace]
  52  */
  53 
  54 import com.sun.management.OperatingSystemMXBean;
  55 import java.lang.management.*;
  56 
  57 import jdk.test.lib.Platform;
  58 import jdk.test.lib.process.ProcessTools;
  59 import jdk.test.lib.process.OutputAnalyzer;
  60 
  61 public class TestTotalSwap {
  62 
  63     private static final OperatingSystemMXBean mbean =
  64         (com.sun.management.OperatingSystemMXBean)
  65         ManagementFactory.getOperatingSystemMXBean();
  66 
  67     // Careful with these values.
  68     // Min size for pass dynamically determined below.
  69     // zero if no swap space is configured.
  70     private static long       min_size_for_pass = 0;
  71     private static final long MAX_SIZE_FOR_PASS = Long.MAX_VALUE;
  72 
  73     public static void main(String args[]) throws Throwable {
  74         // yocto might ignore the request to report swap size in bytes
  75         boolean swapInKB = mbean.getVersion().contains("yocto");
  76 
  77         long expected_swap_size = getSwapSizeFromOs();
  78 
  79         long min_size = mbean.getFreeSwapSpaceSize();
  80         if (min_size > 0) {
  81             min_size_for_pass = min_size;
  82         }
  83 
  84         long size = mbean.getTotalSwapSpaceSize();
  85 
  86         System.out.println("Total swap space size in bytes: " + size);
  87 
  88         if (expected_swap_size > -1) {
  89             if (size != expected_swap_size) {
  90                 // try the expected size in kiloBytes
  91                 if (!(swapInKB && expected_swap_size * 1024 == size)) {
  92                     throw new RuntimeException("Expected total swap size      : " +
  93                                                expected_swap_size +
  94                                                " but getTotalSwapSpaceSize returned: " +
  95                                                size);
  96                 }
  97             }
  98         }
  99 
 100         // sanity check
 101         if (size < min_size_for_pass || size > MAX_SIZE_FOR_PASS) {
 102             throw new RuntimeException("Total swap space size " +
 103                                        "illegal value: " + size + " bytes " +
 104                                        "(MIN = " + min_size_for_pass + "; " +
 105                                        "MAX = " + MAX_SIZE_FOR_PASS + ")");
 106         }
 107 
 108         System.out.println("Test passed.");
 109     }
 110 
 111     private static long getSwapSizeFromOs() throws Throwable {
 112         if (Platform.isLinux()) {
 113             // total       used       free     shared    buffers     cached
 114             // Mem:    16533540864 13638467584 2895073280  534040576 1630248960 6236909568
 115             // -/+ buffers/cache: 5771309056 10762231808
 116             // Swap:   15999168512          0 15999168512
 117             String swapSizeStr = ProcessTools.executeCommand("free", "-b")
 118                                              .firstMatch("Swap:\\s+([0-9]+)\\s+.*", 1);
 119             return Long.parseLong(swapSizeStr);
 120         } else if (Platform.isSolaris()) {
 121             // swapfile             dev   swaplo blocks   free
 122             // /dev/dsk/c0t0d0s1   136,1      16 1638608 1600528
 123             OutputAnalyzer out= ProcessTools.executeCommand(
 124                     "/usr/sbin/swap",
 125                     "-l"
 126             );
 127 
 128             long swapSize = 0;
 129 
 130             for (String line : out.asLines()) {
 131                 if (line.contains("swapfile")) continue;
 132 
 133                 String[] vals = line.split("\\s+");
 134                 if (vals.length == 5) {
 135                     swapSize += Long.parseLong(vals[3]) * 512; // size is reported in 512b blocks
 136                 }
 137             }
 138 
 139             return swapSize;
 140         } else if (Platform.isOSX()) {
 141             // total = 8192.00M used = 7471.11M free = 720.89M (encrypted)
 142             String swapSizeStr = ProcessTools.executeCommand(
 143                     "/usr/sbin/sysctl",
 144                     "-n",
 145                     "vm.swapusage"
 146             ).firstMatch("total\\s+=\\s+([0-9]+(\\.[0-9]+)?[Mm]?).*", 1);
 147             if (swapSizeStr.toLowerCase().endsWith("m")) {
 148                 swapSizeStr = swapSizeStr.substring(0, swapSizeStr.length() - 1);
 149                 return (long)(Double.parseDouble(swapSizeStr) * 1024 * 1024); // size in MB
 150             }
 151             return (long)(Double.parseDouble(swapSizeStr) * 1024 * 1024);
 152         } else {
 153             System.err.println("Unsupported operating system: " + Platform.getOsName());
 154         }
 155 
 156         return -1;
 157     }
 158 }