1 /*
   2  * Copyright (c) 2014, 2015, 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 package compiler.testlibrary;
  25 

  26 import jdk.test.lib.Asserts;
  27 import jdk.test.lib.Platform;
  28 import java.util.stream.IntStream;
  29 import sun.hotspot.WhiteBox;
  30 
  31 public class CompilerUtils {
  32 
  33     private CompilerUtils() {
  34         // to prevent from instantiation
  35     }
  36 
  37     /**
  38      * Returns available compilation levels
  39      *
  40      * @return int array with compilation levels
  41      */
  42     public static int[] getAvailableCompilationLevels() {
  43         if (!WhiteBox.getWhiteBox().getBooleanVMFlag("UseCompiler")) {
  44             return new int[0];
  45         }
  46         if (WhiteBox.getWhiteBox().getBooleanVMFlag("TieredCompilation")) {
  47             Long flagValue = WhiteBox.getWhiteBox()
  48                     .getIntxVMFlag("TieredStopAtLevel");
  49             int maxLevel = flagValue.intValue();
  50             Asserts.assertEQ(new Long(maxLevel), flagValue,
  51                     "TieredStopAtLevel has value out of int capacity");
  52             return IntStream.rangeClosed(1, maxLevel).toArray();
  53         } else {
  54             if (Platform.isServer()) {
  55                 return new int[]{4};
  56             }
  57             if (Platform.isClient() || Platform.isMinimal()) {
  58                 return new int[]{1};
  59             }
  60         }
  61         return new int[0];










  62     }
  63 }
--- EOF ---