1 /*
   2  * Copyright (c) 2017, 2019, Red Hat, Inc. 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 /*
  26  * @test TestLoopMiningArguments
  27  * @summary Test that loop mining arguments are sane
  28  * @requires vm.gc.Shenandoah & !vm.graal.enabled
  29  * @requires vm.flavor == "server"
  30  * @library /test/lib
  31  * @run driver TestLoopMiningArguments
  32  */
  33 
  34 import java.util.*;
  35 
  36 import jdk.test.lib.Asserts;
  37 import jdk.test.lib.process.ProcessTools;
  38 import jdk.test.lib.process.OutputAnalyzer;
  39 
  40 public class TestLoopMiningArguments {
  41 
  42     public static void testWith(String msg, boolean cls, int iters, String... args) throws Exception {
  43         String[] cmds = Arrays.copyOf(args, args.length + 3);
  44         cmds[args.length] = "-Xmx128m";
  45         cmds[args.length + 1] = "-XX:+PrintFlagsFinal";
  46         cmds[args.length + 2] = "-version";
  47         ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(cmds);
  48         OutputAnalyzer output = new OutputAnalyzer(pb.start());
  49         output.shouldHaveExitValue(0);
  50         output.shouldContain("UseCountedLoopSafepoints");
  51         output.shouldContain("LoopStripMiningIter");
  52 
  53         Asserts.assertEQ(output.firstMatch("(.+?) UseCountedLoopSafepoints.+?= (.+?) (.+?)", 2), Boolean.toString(cls), msg + ", but got wrong CLS");
  54         Asserts.assertEQ(output.firstMatch("(.+?) LoopStripMiningIter.+?= (.+?) (.+?)", 2), String.valueOf(iters), msg + ", but got wrong LSM");
  55     }
  56 
  57     public static void main(String[] args) throws Exception {
  58         testWith("Shenandoah should have CLS and LSM enabled",
  59                 true, 1000,
  60                 "-XX:+UnlockExperimentalVMOptions",
  61                 "-XX:+UseShenandoahGC"
  62         );
  63 
  64         testWith("Shenandoah with +CLS should set LSM = 1",
  65                 true, 1,
  66                 "-XX:+UnlockExperimentalVMOptions",
  67                 "-XX:+UseShenandoahGC",
  68                 "-XX:+UseCountedLoopSafepoints"
  69         );
  70 
  71         testWith("Shenandoah GC with +CLS should not override LSM>1",
  72                 true, 10,
  73                 "-XX:+UnlockExperimentalVMOptions",
  74                 "-XX:+UseShenandoahGC",
  75                 "-XX:LoopStripMiningIter=10",
  76                 "-XX:+UseCountedLoopSafepoints"
  77         );
  78 
  79         testWith("Shenandoah GC with +CLS should not override LSM=1",
  80                 true, 1,
  81                 "-XX:+UnlockExperimentalVMOptions",
  82                 "-XX:+UseShenandoahGC",
  83                 "-XX:LoopStripMiningIter=1",
  84                 "-XX:+UseCountedLoopSafepoints"
  85         );
  86 
  87         testWith("Shenandoah GC with +CLS should override LSM=0 to 1",
  88                 true, 1,
  89                 "-XX:+UnlockExperimentalVMOptions",
  90                 "-XX:+UseShenandoahGC",
  91                 "-XX:LoopStripMiningIter=0",
  92                 "-XX:+UseCountedLoopSafepoints"
  93         );
  94 
  95         testWith("Shenandoah GC with -CLS should set LSM = 0",
  96                 false, 0,
  97                 "-XX:+UnlockExperimentalVMOptions",
  98                 "-XX:+UseShenandoahGC",
  99                 "-XX:-UseCountedLoopSafepoints"
 100         );
 101 
 102         testWith("Shenandoah GC with -CLS should override LSM to 0",
 103                 false, 0,
 104                 "-XX:+UnlockExperimentalVMOptions",
 105                 "-XX:+UseShenandoahGC",
 106                 "-XX:LoopStripMiningIter=10",
 107                 "-XX:-UseCountedLoopSafepoints"
 108         );
 109     }
 110 
 111 }