1 /*

     2  * Copyright (c) 2015, 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.IOException;

    25 import java.math.BigDecimal;

    26 import java.util.ArrayList;

    27 import java.util.HashMap;

    28 import java.util.List;

    29 import java.util.Map;

    30 

    31 import jdk.test.lib.apps.LingeredApp;

    32 import jdk.testlibrary.Utils;

    33 import jdk.testlibrary.Platform;

    34 

    35 /*

    36  * @test

    37  * @bug 8042397

    38  * @summary Unit test for jmap utility test heap configuration reader

    39  * @library /test/lib/share/classes

    40  * @library /lib/testlibrary

    41  * @modules java.management

    42  * @build jdk.testlibrary.*

    43  * @build jdk.test.lib.apps.*

    44  * @build JMapHeapConfigTest TmtoolTestScenario

    45  * @run main JMapHeapConfigTest

    46  */

    47 public class JMapHeapConfigTest {

    48 

    49     static final String expectedJMapValues[] = {

    50         "MinHeapFreeRatio",

    51         "MaxHeapFreeRatio",

    52         "MaxHeapSize",

    53         "NewSize",

    54         "MaxNewSize",

    55         "OldSize",

    56         "NewRatio",

    57         "SurvivorRatio",

    58         "MetaspaceSize",

    59         "CompressedClassSpaceSize",

    60         "G1HeapRegionSize"};

    61 

    62     // ignoring MaxMetaspaceSize

    63 

    64     static final String desiredMaxHeapSize = "-Xmx128m";

    65 

    66     private static Map<String, String> parseJMapOutput(List<String> jmapOutput) {

    67         Map<String, String> heapConfigMap = new HashMap<String, String>();

    68         boolean shouldParse = false;

    69 

    70         for (String line : jmapOutput) {

    71             line = line.trim();

    72 

    73             if (line.startsWith("Heap Configuration:")) {

    74                 shouldParse = true;

    75                 continue;

    76             }

    77 

    78             if (line.startsWith("Heap Usage:")) {

    79                 shouldParse = false;

    80                 continue;

    81             }

    82 

    83             if (shouldParse && !line.equals("")) {

    84                 String[] lv = line.split("\\s+");

    85                 try {

    86                     heapConfigMap.put(lv[0], lv[2]);

    87                 } catch (ArrayIndexOutOfBoundsException ex) {

    88                     // Ignore mailformed lines

    89                 }

    90             }

    91         }

    92         return heapConfigMap;

    93     }

    94 

    95     // Compare stored values

    96     private static void compareValues(Map<String, String> parsedJMapOutput, Map<String, String> parsedVmOutput) {

    97         for (String key : expectedJMapValues) {

    98             try {

    99                 String jmapVal = parsedJMapOutput.get(key);

   100                 if (jmapVal == null) {

   101                     throw new RuntimeException("Key '" + key + "' doesn't exists in jmap output");

   102                 }

   103 

   104                 String vmVal = parsedVmOutput.get(key);

   105                 if (vmVal == null) {

   106                     throw new RuntimeException("Key '" + key + "' doesn't exists in vm output");

   107                 }

   108 

   109                 if (new BigDecimal(jmapVal).compareTo(new BigDecimal(vmVal)) != 0) {

   110                     throw new RuntimeException(String.format("Key %s doesn't match %s vs %s", key, vmVal, jmapVal));

   111                 }

   112             } catch (NumberFormatException ex) {

   113                 throw new RuntimeException("Unexpected key '" + key + "' value", ex);

   114             }

   115         }

   116     }

   117 

   118     public static void main(String[] args) throws Exception {

   119         System.out.println("Starting JMapHeapConfigTest");

   120 

   121         if (!Platform.shouldSAAttach()) {

   122             // Silently skip the test if we don't have enough permissions to attach

   123             System.err.println("Error! Insufficient permissions to attach.");

   124             return;

   125         }

   126 

   127         if (!LingeredApp.isLastModifiedWorking()) {

   128             // Exact behaviour of the test depends to operating system and the test nature,

   129             // so just print the warning and continue

   130             System.err.println("Warning! Last modified time doesn't work.");

   131         }

   132 

   133         boolean mx_found = false;

   134         List<String> jvmOptions = Utils.getVmOptions();

   135         for (String option : jvmOptions) {

   136             if (option.startsWith("-Xmx")) {

   137                System.out.println("INFO: maximum heap size set by JTREG as " + option);

   138                mx_found = true;

   139                break;

   140            }

   141         }

   142 

   143         // Forward vm options to LingeredApp

   144         ArrayList<String> cmd = new ArrayList();

   145         cmd.addAll(Utils.getVmOptions());

   146         if (!mx_found) {

   147             cmd.add(desiredMaxHeapSize);

   148             System.out.println("INFO: maximum heap size set explicitly as " + desiredMaxHeapSize);

   149         }

   150         cmd.add("-XX:+PrintFlagsFinal");

   151 

   152         TmtoolTestScenario tmt = TmtoolTestScenario.create("jmap", "-heap");

   153         int exitcode = tmt.launch(cmd);

   154         if (exitcode != 0) {

   155             throw new RuntimeException("Test FAILED jmap exits with non zero exit code " + exitcode);

   156         }

   157 

   158         Map<String,String> parsedJmapOutput = parseJMapOutput(tmt.getToolOutput());

   159         Map<String,String> parsedVMOutput = tmt.parseFlagsFinal();

   160 

   161         compareValues(parsedJmapOutput, parsedVMOutput);

   162 

   163         // If test fails it throws RuntimeException

   164         System.out.println("Test PASSED");

   165     }

   166 }