1 /*

     2  * Copyright (c) 2017, 2018, Red Hat, Inc. All rights reserved.

     3  *

     4  * This code is free software; you can redistribute it and/or modify it

     5  * under the terms of the GNU General Public License version 2 only, as

     6  * published by the Free Software Foundation.

     7  *

     8  * This code is distributed in the hope that it will be useful, but WITHOUT

     9  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    10  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    11  * version 2 for more details (a copy is included in the LICENSE file that

    12  * accompanied this code).

    13  *

    14  * You should have received a copy of the GNU General Public License version

    15  * 2 along with this work; if not, write to the Free Software Foundation,

    16  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    17  *

    18  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    19  * or visit www.oracle.com if you need additional information or have any

    20  * questions.

    21  *

    22  */

    23 

    24 /*

    25  * @test TestLoopMiningArguments

    26  * @summary Test that loop mining arguments are sane

    27  * @key gc

    28  * @requires vm.gc.Shenandoah

    29  * @library /test/lib

    30  * @run driver TestLoopMiningArguments

    31  */

    32 

    33 import java.util.*;

    34 

    35 import jdk.test.lib.Asserts;

    36 import jdk.test.lib.process.ProcessTools;

    37 import jdk.test.lib.process.OutputAnalyzer;

    38 

    39 public class TestLoopMiningArguments {

    40 

    41     public static void testWith(String msg, boolean cls, int iters, String... args) throws Exception {

    42         String[] cmds = Arrays.copyOf(args, args.length + 2);

    43         cmds[args.length] = "-XX:+PrintFlagsFinal";

    44         cmds[args.length + 1] = "-version";

    45         ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(cmds);

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

    47         output.shouldHaveExitValue(0);

    48         output.shouldContain("UseCountedLoopSafepoints");

    49         output.shouldContain("LoopStripMiningIter");

    50 

    51         Asserts.assertEQ(output.firstMatch("(.+?) UseCountedLoopSafepoints.+?= (.+?) (.+?)", 2), Boolean.toString(cls), msg + ", but got wrong CLS");

    52         Asserts.assertEQ(output.firstMatch("(.+?) LoopStripMiningIter.+?= (.+?) (.+?)", 2), String.valueOf(iters), msg + ", but got wrong LSM");

    53     }

    54 

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

    56         testDefaultGC();

    57         testShenandoah();

    58     }

    59 

    60     public static void testDefaultGC() throws Exception {

    61         testWith("Default GC should have CLS enabled, LSM = 1000",

    62                 true, 1000);

    63 

    64         testWith("Default GC with +CLS should set LSM = 1",

    65                 true, 1,

    66                 "-XX:+UseCountedLoopSafepoints"

    67         );

    68 

    69         testWith("Default GC with +CLS should not override LSM>1",

    70                 true, 10,

    71                 "-XX:LoopStripMiningIter=10",

    72                 "-XX:+UseCountedLoopSafepoints"

    73         );

    74 

    75         testWith("Default GC with +CLS should not override LSM=1",

    76                 true, 1,

    77                 "-XX:LoopStripMiningIter=1",

    78                 "-XX:+UseCountedLoopSafepoints"

    79         );

    80 

    81         testWith("Default GC with +CLS should override LSM=0 to 1",

    82                 true, 1,

    83                 "-XX:LoopStripMiningIter=0",

    84                 "-XX:+UseCountedLoopSafepoints"

    85         );

    86 

    87         testWith("Default GC with -CLS should set LSM = 0",

    88                 false, 0,

    89                 "-XX:-UseCountedLoopSafepoints"

    90         );

    91 

    92         testWith("Default GC with -CLS should override LSM to 0",

    93                 false, 0,

    94                 "-XX:LoopStripMiningIter=10",

    95                 "-XX:-UseCountedLoopSafepoints"

    96         );

    97     }

    98 

    99     public static void testShenandoah() throws Exception {

   100         testWith("Shenandoah should have CLS and LSM enabled",

   101                 true, 1000,

   102                 "-XX:+UnlockExperimentalVMOptions",

   103                 "-XX:+UseShenandoahGC"

   104         );

   105 

   106         testWith("Shenandoah with +CLS should set LSM = 1",

   107                 true, 1,

   108                 "-XX:+UnlockExperimentalVMOptions",

   109                 "-XX:+UseShenandoahGC",

   110                 "-XX:+UseCountedLoopSafepoints"

   111         );

   112 

   113         testWith("Shenandoah GC with +CLS should not override LSM>1",

   114                 true, 10,

   115                 "-XX:+UnlockExperimentalVMOptions",

   116                 "-XX:+UseShenandoahGC",

   117                 "-XX:LoopStripMiningIter=10",

   118                 "-XX:+UseCountedLoopSafepoints"

   119         );

   120 

   121         testWith("Shenandoah GC with +CLS should not override LSM=1",

   122                 true, 1,

   123                 "-XX:+UnlockExperimentalVMOptions",

   124                 "-XX:+UseShenandoahGC",

   125                 "-XX:LoopStripMiningIter=1",

   126                 "-XX:+UseCountedLoopSafepoints"

   127         );

   128 

   129         testWith("Shenandoah GC with +CLS should override LSM=0 to 1",

   130                 true, 1,

   131                 "-XX:+UnlockExperimentalVMOptions",

   132                 "-XX:+UseShenandoahGC",

   133                 "-XX:LoopStripMiningIter=0",

   134                 "-XX:+UseCountedLoopSafepoints"

   135         );

   136 

   137         testWith("Shenandoah GC with -CLS should set LSM = 0",

   138                 false, 0,

   139                 "-XX:+UnlockExperimentalVMOptions",

   140                 "-XX:+UseShenandoahGC",

   141                 "-XX:-UseCountedLoopSafepoints"

   142         );

   143 

   144         testWith("Shenandoah GC with -CLS should override LSM to 0",

   145                 false, 0,

   146                 "-XX:+UnlockExperimentalVMOptions",

   147                 "-XX:+UseShenandoahGC",

   148                 "-XX:LoopStripMiningIter=10",

   149                 "-XX:-UseCountedLoopSafepoints"

   150         );

   151     }

   152 

   153 }