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  * @test
  26  * @summary Check to make sure that shared strings in the bootstrap CDS archive
  27  *          are actually shared
  28  * @requires vm.cds.archived.java.heap
  29  * @library /test/lib
  30  * @modules java.base/jdk.internal.misc
  31  *          java.management
  32  * @build SharedStringsWb sun.hotspot.WhiteBox
  33  * @run driver ClassFileInstaller -jar whitebox.jar sun.hotspot.WhiteBox
  34  * @run driver SharedStrings
  35  */
  36 
  37 import jdk.test.lib.cds.CDSTestUtils;
  38 import jdk.test.lib.process.ProcessTools;
  39 import jdk.test.lib.process.OutputAnalyzer;
  40 
  41 public class SharedStrings {
  42     public static void main(String[] args) throws Exception {
  43         // Note: This is a basic sanity test for Shared Strings feature.
  44         // This also serves as a reference on how to use this feature,
  45         // hence the command lines are spelled out instead of using the
  46         // test utils methods.
  47         ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
  48             "-XX:+UnlockDiagnosticVMOptions",
  49             "-XX:SharedArchiveFile=./SharedStrings.jsa",
  50             "-Xlog:cds,cds+hashtables",
  51             // Needed for bootclasspath match, for CDS to work with WhiteBox API
  52             "-Xbootclasspath/a:" + ClassFileInstaller.getJarPath("whitebox.jar"),
  53             "-Xshare:dump");
  54 
  55         OutputAnalyzer out = CDSTestUtils.executeAndLog(pb, "dump");
  56         CDSTestUtils.checkDump(out, "Shared string table stats");
  57 
  58 
  59         pb = ProcessTools.createJavaProcessBuilder(
  60                 "-XX:+UnlockDiagnosticVMOptions",
  61                 "-XX:SharedArchiveFile=./SharedStrings.jsa",
  62                 // needed for access to white box test API
  63                 "-Xbootclasspath/a:" + ClassFileInstaller.getJarPath("whitebox.jar"),
  64                 "-XX:+UnlockDiagnosticVMOptions", "-XX:+WhiteBoxAPI",
  65                 "-Xshare:on", "-showversion", "SharedStringsWb");
  66 
  67         out = CDSTestUtils.executeAndLog(pb, "exec");
  68         CDSTestUtils.checkExec(out);
  69     }
  70 }