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 package compiler.testlibrary; 24 25 import jdk.test.lib.Asserts; 26 import jdk.test.lib.Platform; 27 import java.util.stream.IntStream; 28 import sun.hotspot.WhiteBox; 29 30 public class CompilerUtils { 31 32 private CompilerUtils() { 33 // to prevent from instantiation 34 } 35 36 /** 37 * Returns available compilation levels 38 * 39 * @return int array with compilation levels 40 */ 41 public static int[] getAvailableCompilationLevels() { 42 if (!WhiteBox.getWhiteBox().getBooleanVMFlag("UseCompiler")) { 43 return new int[0]; 44 } 45 if (WhiteBox.getWhiteBox().getBooleanVMFlag("TieredCompilation")) { 46 Long flagValue = WhiteBox.getWhiteBox() 47 .getIntxVMFlag("TieredStopAtLevel"); 48 int maxLevel = flagValue.intValue(); 49 Asserts.assertEQ(new Long(maxLevel), flagValue, 50 "TieredStopAtLevel has value out of int capacity"); 51 return IntStream.rangeClosed(1, maxLevel).toArray(); 52 } else { 53 if (Platform.isServer()) { 54 return new int[]{4}; 55 } 56 if (Platform.isClient() || Platform.isMinimal()) { 57 return new int[]{1}; 58 } 59 } 60 return new int[0]; 61 } 62 }