hotspot/test/gc/arguments/TestG1PercentageOptions.java
author kbarrett
Thu, 29 Jan 2015 00:08:38 -0500
changeset 28832 4c2704386850
child 29678 dd2f3932c21e
permissions -rw-r--r--
8068942: Improve validation of -XX:G1ConfidencePercent value Summary: Validate during argument processing and simplify usage by assuming validated. Reviewed-by: jmasa, tschatzl
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/*
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* Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*
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 * @test TestG1PercentageOptions
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 * @key gc
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 * @bug 8068942
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 * @summary Test argument processing of various percentage options
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 * @library /testlibrary
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 * @run driver TestG1PercentageOptions
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 */
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import com.oracle.java.testlibrary.*;
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public class TestG1PercentageOptions {
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    private static final class OptionDescription {
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        public final String name;
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        public final String[] valid;
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        public final String[] invalid;
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        OptionDescription(String name_, String[] valid_, String[] invalid_) {
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            name = name_;
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            valid = valid_;
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            invalid = invalid_;
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        }
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    }
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    private static final String[] defaultValid = new String[] {
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        "0", "1", "50", "95", "100" };
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    private static final String[] defaultInvalid = new String[] {
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        "-10", "110", "bad" };
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    // All of the G1 product arguments that are percentages.
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    private static final OptionDescription[] percentOptions = new OptionDescription[] {
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        new OptionDescription("G1ConfidencePercent", defaultValid, defaultInvalid)
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        // Other percentage options are not yet validated by argument processing.
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    };
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    private static void check(String flag, boolean is_valid) throws Exception {
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        String[] flags = new String[] { "-XX:+UseG1GC", flag, "-version" };
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        ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(flags);
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        OutputAnalyzer output = new OutputAnalyzer(pb.start());
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        if (is_valid) {
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            output.shouldHaveExitValue(0);
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        } else {
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            output.shouldHaveExitValue(1);
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        }
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    }
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    private static
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    void check(String name, String value, boolean is_valid) throws Exception {
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        check("-XX:" + name + "=" + value, is_valid);
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    }
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    public static void main(String args[]) throws Exception {
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        for (OptionDescription option : percentOptions) {
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            for (String value : option.valid) {
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                check(option.name, value, true);
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            }
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            for (String value : option.invalid) {
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                check(option.name, value, false);
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            }
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            check("-XX:" + option.name, false);
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            check("-XX:+" + option.name, false);
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            check("-XX:-" + option.name, false);
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        }
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    }
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}