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 java.util.Arrays; 27 import jdk.test.lib.Asserts; 28 import jdk.test.lib.Platform; 29 import java.util.stream.IntStream; 30 import sun.hotspot.WhiteBox; 31 32 public class CompilerUtils { 33 34 private CompilerUtils() { 35 // to prevent from instantiation 36 } 37 38 /** 39 * Returns available compilation levels 40 * 41 * @return int array with compilation levels 42 */ 43 public static int[] getAvailableCompilationLevels() { 44 if (!WhiteBox.getWhiteBox().getBooleanVMFlag("UseCompiler")) { 45 return new int[0]; 46 } 47 if (WhiteBox.getWhiteBox().getBooleanVMFlag("TieredCompilation")) { 48 Long flagValue = WhiteBox.getWhiteBox() 49 .getIntxVMFlag("TieredStopAtLevel"); 50 int maxLevel = flagValue.intValue(); 51 Asserts.assertEQ(new Long(maxLevel), flagValue, 52 "TieredStopAtLevel has value out of int capacity"); 53 return IntStream.rangeClosed(1, maxLevel).toArray(); 54 } else { 55 if (Platform.isServer()) { 56 return new int[]{4}; 57 } 58 if (Platform.isClient() || Platform.isMinimal()) { 59 return new int[]{1}; 60 } 61 } 62 return new int[0]; 63 } 64 65 /** 66 * Returns maximum compilation level available 67 * @return an int value representing maximum compilation level available 68 */ 69 public static int getMaxCompilationLevel() { 70 return Arrays.stream(getAvailableCompilationLevels()) 71 .max() 72 .getAsInt(); 73 } 74 }