1 /*

     2  * Copyright (c) 2015, 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 /*

    26  * @test

    27  * @summary Run multiple processes with the same archive, ensure they share

    28  *

    29  * @requires vm.cds

    30  * @library /test/lib

    31  * @modules java.base/jdk.internal.misc

    32  *          java.management

    33  *          jdk.jartool/sun.tools.jar

    34  * @build sun.hotspot.WhiteBox

    35  * @run driver ClassFileInstaller sun.hotspot.WhiteBox

    36  * @compile test-classes/MultiProcClass.java

    37  * @run driver MultiProcessSharing

    38  */

    39 

    40 import java.io.File;

    41 import jdk.test.lib.Asserts;

    42 import jdk.test.lib.Platform;

    43 import jdk.test.lib.process.OutputAnalyzer;

    44 import sun.hotspot.WhiteBox;

    45 

    46 

    47 public class MultiProcessSharing {

    48     static String useWbJar;

    49     static String sharedClass1Jar;

    50     static boolean checkPmap = false;

    51 

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

    53         String wbJar = JarBuilder.build(true, "WhiteBox", "sun/hotspot/WhiteBox");

    54         useWbJar = "-Xbootclasspath/a:" + wbJar;

    55         sharedClass1Jar = JarBuilder.build("shared_class1", "MultiProcClass");

    56 

    57         // create an archive

    58         OutputAnalyzer out = TestCommon.dump(sharedClass1Jar,

    59             TestCommon.list("MultiProcClass"), useWbJar);

    60         TestCommon.checkDump(out);

    61 

    62         // determine whether OK to use pmap for extra test verification

    63         long myPid = ProcessHandle.current().pid();

    64         checkPmap = (Platform.isLinux() && (MultiProcClass.runPmap(myPid, false) == 0));

    65         System.out.println("MultiProcessSharing: checkPmap is " + checkPmap);

    66 

    67         // use an archive in several processes concurrently

    68         int numProcesses = 3;

    69         Thread[] threads = new Thread[numProcesses];

    70         ProcessHandler[] processHandlers = new ProcessHandler[numProcesses];

    71         for (int i = 0; i < numProcesses; i++) {

    72             processHandlers[i] = new ProcessHandler(i);

    73             threads[i] = new Thread(processHandlers[i]);

    74         }

    75 

    76         for (Thread t : threads) {

    77             t.start();

    78         }

    79 

    80         for (Thread t : threads) {

    81             try {

    82                 t.join();

    83             } catch (InterruptedException ie) {

    84                 throw ie;

    85             }

    86         }

    87 

    88         // check results

    89         for (ProcessHandler ph : processHandlers) {

    90             TestCommon.checkExec(ph.out);

    91             if (checkPmap && !TestCommon.isUnableToMap(ph.out)) {

    92                 checkPmapOutput(ph.out.getOutput());

    93             }

    94         }

    95     }

    96 

    97 

    98     static class ProcessHandler implements Runnable {

    99         int processNumber;

   100         OutputAnalyzer out;

   101 

   102         ProcessHandler(int processNumber) {

   103             this.processNumber = processNumber;

   104         }

   105 

   106         @Override

   107         public void run() {

   108             try {

   109                 out = TestCommon.exec(sharedClass1Jar,

   110                    "-XX:+UnlockDiagnosticVMOptions", "-XX:+WhiteBoxAPI", useWbJar,

   111                    "MultiProcClass", "" + processNumber, "" + checkPmap);

   112             } catch (Exception e) {

   113                 throw new RuntimeException("Error occurred when using archive, exec()" + e);

   114             }

   115         }

   116     }

   117 

   118 

   119     private static void checkPmapOutput(String stdio) {

   120         System.out.println("Checking pmap output ...");

   121         String[] lines = stdio.split("\n");

   122 

   123         boolean foundJsa = false;

   124         boolean foundReadOnlyJsaSection = false;

   125 

   126         for (String line : lines) {

   127             if (line.contains(TestCommon.getCurrentArchiveName()))

   128                 System.out.println(line);

   129                 foundJsa = true;

   130                 if (line.contains("r--")) {

   131                     foundReadOnlyJsaSection = true;

   132                 }

   133 

   134                 // On certain ARM platforms system maps r/o memory mapped files

   135                 // as r/x; see JDK-8145694 for details

   136                 if ( (Platform.isARM() || Platform.isAArch64()) && line.contains("r-x") ) {

   137                     foundReadOnlyJsaSection = true;

   138                 }

   139         }

   140 

   141         Asserts.assertTrue(foundJsa && foundReadOnlyJsaSection);

   142     }

   143 

   144 }