1 /*

     2 * Copyright (c) 2014, 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 TestG1ConcRefinementThreads

    26  * @key gc

    27  * @bug 8047976

    28  * @summary Tests argument processing for G1ConcRefinementThreads

    29  * @library /testlibrary

    30  */

    31 

    32 import com.oracle.java.testlibrary.*;

    33 import java.util.*;

    34 import java.util.regex.*;

    35 

    36 public class TestG1ConcRefinementThreads {

    37 

    38   static final int AUTO_SELECT_THREADS_COUNT = 0;

    39   static final int PASSED_THREADS_COUNT = 11;

    40 

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

    42     // default case

    43     runG1ConcRefinementThreadsTest(

    44         new String[]{}, // automatically selected

    45         AUTO_SELECT_THREADS_COUNT /* use default setting */);

    46 

    47     // zero setting case

    48     runG1ConcRefinementThreadsTest(

    49         new String[]{"-XX:G1ConcRefinementThreads=0"}, // automatically selected

    50         AUTO_SELECT_THREADS_COUNT /* set to zero */);

    51 

    52     // non-zero sestting case

    53     runG1ConcRefinementThreadsTest(

    54         new String[]{"-XX:G1ConcRefinementThreads="+Integer.toString(PASSED_THREADS_COUNT)},

    55         PASSED_THREADS_COUNT);

    56   }

    57 

    58   private static void runG1ConcRefinementThreadsTest(String[] passedOpts,

    59           int expectedValue) throws Exception {

    60     List<String> vmOpts = new ArrayList<>();

    61     if (passedOpts.length > 0) {

    62       Collections.addAll(vmOpts, passedOpts);

    63     }

    64     Collections.addAll(vmOpts, "-XX:+UseG1GC", "-XX:+PrintFlagsFinal", "-version");

    65 

    66     ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(vmOpts.toArray(new String[vmOpts.size()]));

    67     OutputAnalyzer output = new OutputAnalyzer(pb.start());

    68 

    69     output.shouldHaveExitValue(0);

    70     String stdout = output.getStdout();

    71     checkG1ConcRefinementThreadsConsistency(stdout, expectedValue);

    72   }

    73 

    74   private static void checkG1ConcRefinementThreadsConsistency(String output, int expectedValue) {

    75     int actualValue = getIntValue("G1ConcRefinementThreads", output);

    76 

    77     if (expectedValue == 0) {

    78       // If expectedValue is automatically selected, set it same as ParallelGCThreads.

    79       expectedValue = getIntValue("ParallelGCThreads", output);

    80     }

    81 

    82     if (expectedValue != actualValue) {

    83       throw new RuntimeException(

    84             "Actual G1ConcRefinementThreads(" + Integer.toString(actualValue)

    85             + ") is not equal to expected value(" + Integer.toString(expectedValue) + ")");

    86     }

    87   }

    88 

    89   public static int getIntValue(String flag, String where) {

    90     Matcher m = Pattern.compile(flag + "\\s+:?=\\s+\\d+").matcher(where);

    91     if (!m.find()) {

    92       throw new RuntimeException("Could not find value for flag " + flag + " in output string");

    93     }

    94     String match = m.group();

    95     return Integer.parseInt(match.substring(match.lastIndexOf(" ") + 1, match.length()));

    96   }

    97 }