1 /* 2 * Copyright (c) 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 25 package gc.g1.humongousObjects; 26 27 import gc.testlibrary.Helpers; 28 import sun.hotspot.WhiteBox; 29 30 import java.io.IOException; 31 import java.nio.file.Path; 32 33 /** 34 * Provides generated and compiled sample classes and theirs expected sizes. 35 */ 36 public enum G1SampleClass { 37 38 LARGEST_NON_HUMONGOUS { 39 @Override 40 public long expectedInstanceSize() { 41 return HALF_G1_REGION_SIZE; 42 } 43 }, 44 SMALLEST_HUMONGOUS { 45 @Override 46 public long expectedInstanceSize() { 47 return HALF_G1_REGION_SIZE + Helpers.SIZE_OF_LONG; 48 } 49 }, 50 ONE_REGION_HUMONGOUS { 51 @Override 52 public long expectedInstanceSize() { 53 return G1_REGION_SIZE; 54 } 55 }, 56 TWO_REGION_HUMONGOUS { 57 @Override 58 public long expectedInstanceSize() { 59 return G1_REGION_SIZE + Helpers.SIZE_OF_LONG; 60 } 61 }, 62 MORE_THAN_TWO_REGION_HUMONGOUS { 63 @Override 64 public long expectedInstanceSize() { 65 return G1_REGION_SIZE * 2 + Helpers.SIZE_OF_LONG; 66 } 67 }; 68 69 private static final long G1_REGION_SIZE = WhiteBox.getWhiteBox().g1RegionSize(); 70 private static final long HALF_G1_REGION_SIZE = G1_REGION_SIZE / 2; 71 72 /** 73 * Generates and compiles class with instance of specified size and loads it in specified class loader 74 * 75 * @param classLoader class loader which will be used to load class 76 * @param wrkDir working dir where generated classes are put and compiled 77 * @param classNamePrefix prefix for service classes (ones we use to create chain of inheritance) 78 * @return a class of specified size loaded in specified class loader 79 * @throws IOException 80 * @throws ClassNotFoundException 81 */ 82 83 public Class<?> getCls(ClassLoader classLoader, Path wrkDir, String classNamePrefix) 84 throws IOException, ClassNotFoundException { 85 return Helpers.generateCompileAndLoad(classLoader, Helpers.enumNameToClassName(name()) + "Class", 86 expectedInstanceSize(), wrkDir, classNamePrefix); 87 } 88 89 /** 90 * @return G1SampleClass instance expected size 91 */ 92 public abstract long expectedInstanceSize(); 93 }