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  * @library /test/lib
  29  * @run driver TestLoopMiningArguments
  30  */
  31 
  32 import java.util.*;
  33 
  34 import jdk.test.lib.Asserts;
  35 import jdk.test.lib.process.ProcessTools;
  36 import jdk.test.lib.process.OutputAnalyzer;
  37 
  38 public class TestLoopMiningArguments {
  39 
  40     public static void testWith(String msg, boolean cls, int iters, String... args) throws Exception {
  41         String[] cmds = Arrays.copyOf(args, args.length + 2);
  42         cmds[args.length] = "-XX:+PrintFlagsFinal";
  43         cmds[args.length + 1] = "-version";
  44         ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(cmds);
  45         OutputAnalyzer output = new OutputAnalyzer(pb.start());
  46         output.shouldHaveExitValue(0);
  47         output.shouldContain("UseCountedLoopSafepoints");
  48         output.shouldContain("LoopStripMiningIter");
  49 
  50         Asserts.assertEQ(output.firstMatch("(.+?) UseCountedLoopSafepoints.+?= (.+?) (.+?)", 2), Boolean.toString(cls), msg + ", but got wrong CLS");
  51         Asserts.assertEQ(output.firstMatch("(.+?) LoopStripMiningIter.+?= (.+?) (.+?)", 2), String.valueOf(iters), msg + ", but got wrong LSM");
  52     }
  53 
  54     public static void main(String[] args) throws Exception {
  55         testDefaultGC();
  56         testShenandoah();
  57     }
  58 
  59     public static void testDefaultGC() throws Exception {
  60         testWith("Default GC should have CLS enabled, LSM = 1000",
  61             true, 1000);
  62 
  63         testWith("Default GC with +CLS should set LSM = 1",
  64             true, 1,
  65             "-XX:+UseCountedLoopSafepoints"
  66         );
  67 
  68         testWith("Default GC with +CLS should not override LSM>1",
  69             true, 10,
  70             "-XX:LoopStripMiningIter=10",
  71             "-XX:+UseCountedLoopSafepoints"
  72         );
  73 
  74         testWith("Default GC with +CLS should not override LSM=1",
  75             true, 1,
  76             "-XX:LoopStripMiningIter=1",
  77             "-XX:+UseCountedLoopSafepoints"
  78         );
  79 
  80         testWith("Default GC with +CLS should override LSM=0 to 1",
  81             true, 1,
  82             "-XX:LoopStripMiningIter=0",
  83             "-XX:+UseCountedLoopSafepoints"
  84         );
  85 
  86         testWith("Default GC with -CLS should set LSM = 0",
  87             false, 0,
  88             "-XX:-UseCountedLoopSafepoints"
  89         );
  90 
  91         testWith("Default GC with -CLS should override LSM to 0",
  92             false, 0,
  93             "-XX:LoopStripMiningIter=10",
  94             "-XX:-UseCountedLoopSafepoints"
  95         );
  96     }
  97 
  98     public static void testShenandoah() throws Exception {
  99         testWith("Shenandoah should have CLS and LSM enabled",
 100             true, 1000,
 101             "-XX:+UnlockExperimentalVMOptions",
 102             "-XX:+UseShenandoahGC"
 103         );
 104 
 105         testWith("Shenandoah with +CLS should set LSM = 1",
 106             true, 1,
 107             "-XX:+UnlockExperimentalVMOptions",
 108             "-XX:+UseShenandoahGC",
 109             "-XX:+UseCountedLoopSafepoints"
 110         );
 111 
 112         testWith("Shenandoah GC with +CLS should not override LSM>1",
 113             true, 10,
 114             "-XX:+UnlockExperimentalVMOptions",
 115             "-XX:+UseShenandoahGC",
 116             "-XX:LoopStripMiningIter=10",
 117             "-XX:+UseCountedLoopSafepoints"
 118         );
 119 
 120         testWith("Shenandoah GC with +CLS should not override LSM=1",
 121             true, 1,
 122             "-XX:+UnlockExperimentalVMOptions",
 123             "-XX:+UseShenandoahGC",
 124             "-XX:LoopStripMiningIter=1",
 125             "-XX:+UseCountedLoopSafepoints"
 126         );
 127 
 128         testWith("Shenandoah GC with +CLS should override LSM=0 to 1",
 129             true, 1,
 130             "-XX:+UnlockExperimentalVMOptions",
 131             "-XX:+UseShenandoahGC",
 132             "-XX:LoopStripMiningIter=0",
 133             "-XX:+UseCountedLoopSafepoints"
 134         );
 135 
 136         testWith("Shenandoah GC with -CLS should set LSM = 0",
 137             false, 0,
 138             "-XX:+UnlockExperimentalVMOptions",
 139             "-XX:+UseShenandoahGC",
 140             "-XX:-UseCountedLoopSafepoints"
 141         );
 142 
 143         testWith("Shenandoah GC with -CLS should override LSM to 0",
 144             false, 0,
 145             "-XX:+UnlockExperimentalVMOptions",
 146             "-XX:+UseShenandoahGC",
 147             "-XX:LoopStripMiningIter=10",
 148             "-XX:-UseCountedLoopSafepoints"
 149         );
 150     }
 151 
 152 }