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 }