1 /* 2 * Copyright (c) 2014, 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 import com.oracle.java.testlibrary.Asserts; 25 import com.oracle.java.testlibrary.Platform; 26 import java.util.stream.IntStream; 27 import sun.hotspot.WhiteBox; 28 29 public class CompilerUtils { 30 31 private CompilerUtils() { 32 // to prevent from instantiation 33 } 34 35 /** 36 * Returns available compilation levels 37 * 38 * @return int array with compilation levels 39 */ 40 public static int[] getAvailableCompilationLevels() { 41 if (System.getProperty("java.vm.info").startsWith("interpreted ")) { 42 return new int[0]; 43 } 44 if (WhiteBox.getWhiteBox().getBooleanVMFlag("TieredCompilation")) { 45 Long flagValue = WhiteBox.getWhiteBox() 46 .getIntxVMFlag("TieredStopAtLevel"); 47 int maxLevel = flagValue.intValue(); 48 Asserts.assertEQ(new Long(maxLevel), flagValue, 49 "TieredStopAtLevel has value out of int capacity"); 50 return IntStream.rangeClosed(1, maxLevel).toArray(); 51 } else { 52 if (Platform.isServer()) { 53 return new int[]{4}; 54 } 55 if (Platform.isClient() || Platform.isMinimal()) { 56 return new int[]{1}; 57 } 58 } 59 return new int[0]; 60 } 61 }