1 /* 2 * Copyright (C) 2015 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 import java.util.TreeMap; 18 19 public class Main { 20 private static TreeMap treeMap = new TreeMap(); 21 22 public static void main(String[] args) { 23 System.loadLibrary(args[0]); 24 testHomogeneousCompaction(); 25 testCollectorTransitions(); 26 System.out.println("Done."); 27 } 28 29 private static void allocateStuff() { 30 for (int i = 0; i < 1000; ++i) { 31 Object o = new Object(); 32 treeMap.put(o.hashCode(), o); 33 } 34 } 35 36 public static void testHomogeneousCompaction() { 37 System.out.println("Attempting homogeneous compaction"); 38 final boolean supportHSC = supportHomogeneousSpaceCompact(); 39 Object o = new Object(); 40 long addressBefore = objectAddress(o); 41 long addressAfter; 42 allocateStuff(); 43 final boolean success = performHomogeneousSpaceCompact(); 44 allocateStuff(); 45 System.out.println("Homogeneous compaction support=" + supportHSC + " success=" + success); 46 if (supportHSC != success) { 47 System.out.println("error: Expected " + supportHSC + " but got " + success); 48 } 49 if (success) { 50 allocateStuff(); 51 addressAfter = objectAddress(o); 52 // This relies on the compaction copying from one space to another space and there being no 53 // overlap. 54 if (addressBefore == addressAfter) { 55 System.out.println("error: Expected different adddress " + addressBefore + " vs " + 56 addressAfter); 57 } 58 } 59 if (supportHSC) { 60 incrementDisableMovingGC(); 61 if (performHomogeneousSpaceCompact()) { 62 System.out.println("error: Compaction succeeded when moving GC is disabled"); 63 } 64 decrementDisableMovingGC(); 65 if (!performHomogeneousSpaceCompact()) { 66 System.out.println("error: Compaction failed when moving GC is enabled"); 67 } 68 } 69 } 70 71 private static void testCollectorTransitions() { 72 if (supportCollectorTransition()) { 73 Object o = new Object(); 74 // Transition to semi-space collector. 75 allocateStuff(); 76 transitionToSS(); 77 allocateStuff(); 78 long addressBefore = objectAddress(o); 79 Runtime.getRuntime().gc(); 80 long addressAfter = objectAddress(o); 81 if (addressBefore == addressAfter) { 82 System.out.println("error: Expected different adddress " + addressBefore + " vs " + 83 addressAfter); 84 } 85 // Transition back to CMS. 86 transitionToCMS(); 87 allocateStuff(); 88 addressBefore = objectAddress(o); 89 Runtime.getRuntime().gc(); 90 addressAfter = objectAddress(o); 91 if (addressBefore != addressAfter) { 92 System.out.println("error: Expected same adddress " + addressBefore + " vs " + 93 addressAfter); 94 } 95 } 96 } 97 98 // Methods to get access to ART internals. 99 private static native boolean supportHomogeneousSpaceCompact(); 100 private static native boolean performHomogeneousSpaceCompact(); 101 private static native void incrementDisableMovingGC(); 102 private static native void decrementDisableMovingGC(); 103 private static native long objectAddress(Object object); 104 private static native boolean supportCollectorTransition(); 105 private static native void transitionToSS(); 106 private static native void transitionToCMS(); 107 } 108
