1 /*

     2  * Copyright (c) 2015, 2019, 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 jdk.jartool/sun.tools.jar

    32  * @build sun.hotspot.WhiteBox

    33  * @run driver ClassFileInstaller sun.hotspot.WhiteBox

    34  * @compile test-classes/MultiProcClass.java

    35  * @run driver MultiProcessSharing

    36  */

    37 

    38 import java.io.File;

    39 import jdk.test.lib.Asserts;

    40 import jdk.test.lib.Platform;

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

    42 import sun.hotspot.WhiteBox;

    43 

    44 

    45 public class MultiProcessSharing {

    46     static String useWbJar;

    47     static String sharedClass1Jar;

    48     static boolean checkPmap = false;

    49 

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

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

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

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

    54 

    55         // create an archive

    56         OutputAnalyzer out = TestCommon.dump(sharedClass1Jar,

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

    58         TestCommon.checkDump(out);

    59 

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

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

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

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

    64 

    65         // use an archive in several processes concurrently

    66         int numProcesses = 3;

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

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

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

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

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

    72         }

    73 

    74         for (Thread t : threads) {

    75             t.start();

    76         }

    77 

    78         for (Thread t : threads) {

    79             try {

    80                 t.join();

    81             } catch (InterruptedException ie) {

    82                 throw ie;

    83             }

    84         }

    85 

    86         // check results

    87         for (ProcessHandler ph : processHandlers) {

    88             TestCommon.checkExec(ph.out);

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

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

    91             }

    92         }

    93     }

    94 

    95 

    96     static class ProcessHandler implements Runnable {

    97         int processNumber;

    98         OutputAnalyzer out;

    99 

   100         ProcessHandler(int processNumber) {

   101             this.processNumber = processNumber;

   102         }

   103 

   104         @Override

   105         public void run() {

   106             try {

   107                 out = TestCommon.exec(sharedClass1Jar,

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

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

   110             } catch (Exception e) {

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

   112             }

   113         }

   114     }

   115 

   116 

   117     private static void checkPmapOutput(String stdio) {

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

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

   120 

   121         boolean foundJsa = false;

   122         boolean foundReadOnlyJsaSection = false;

   123 

   124         for (String line : lines) {

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

   126                 System.out.println(line);

   127                 foundJsa = true;

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

   129                     foundReadOnlyJsaSection = true;

   130                 }

   131 

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

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

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

   135                     foundReadOnlyJsaSection = true;

   136                 }

   137         }

   138 

   139         Asserts.assertTrue(foundJsa && foundReadOnlyJsaSection);

   140     }

   141 

   142 }