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