1 /*
   2 * Copyright (c) 2016, 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 TestG1PercentageOptions
  26  * @key gc
  27  * @bug 8068942
  28  * @requires vm.gc.G1
  29  * @summary Test argument processing of various percentage options
  30  * @library /test/lib
  31  * @modules java.base/jdk.internal.misc
  32  *          java.management
  33  * @run driver TestG1PercentageOptions
  34  */
  35 
  36 import jdk.test.lib.process.OutputAnalyzer;
  37 import jdk.test.lib.process.ProcessTools;
  38 
  39 public class TestG1PercentageOptions {
  40 
  41     private static final class OptionDescription {
  42         public final String name;
  43         public final String[] valid;
  44         public final String[] invalid;
  45 
  46         OptionDescription(String name_, String[] valid_, String[] invalid_) {
  47             name = name_;
  48             valid = valid_;
  49             invalid = invalid_;
  50         }
  51     }
  52 
  53     private static final String[] defaultValid = new String[] {
  54         "0", "1", "50", "95", "100" };
  55     private static final String[] defaultInvalid = new String[] {
  56         "-10", "110", "bad" };
  57 
  58     // All of the G1 product arguments that are percentages.
  59     private static final OptionDescription[] percentOptions = new OptionDescription[] {
  60         new OptionDescription("G1ConfidencePercent", defaultValid, defaultInvalid)
  61         // Other percentage options are not yet validated by argument processing.
  62     };
  63 
  64     private static void check(String flag, boolean is_valid) throws Exception {
  65         String[] flags = new String[] { "-XX:+UseG1GC", flag, "-version" };
  66         ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(flags);
  67         OutputAnalyzer output = new OutputAnalyzer(pb.start());
  68         if (is_valid) {
  69             output.shouldHaveExitValue(0);
  70         } else {
  71             output.shouldHaveExitValue(1);
  72         }
  73     }
  74 
  75     private static
  76     void check(String name, String value, boolean is_valid) throws Exception {
  77         check("-XX:" + name + "=" + value, is_valid);
  78     }
  79 
  80     public static void main(String args[]) throws Exception {
  81         for (OptionDescription option : percentOptions) {
  82             for (String value : option.valid) {
  83                 check(option.name, value, true);
  84             }
  85             for (String value : option.invalid) {
  86                 check(option.name, value, false);
  87             }
  88             check("-XX:" + option.name, false);
  89             check("-XX:+" + option.name, false);
  90             check("-XX:-" + option.name, false);
  91         }
  92     }
  93 }