/*
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* Copyright (C) 2016 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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import java.util.TreeMap;
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public class MovingGCThread implements Runnable {
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private static TreeMap treeMap = new TreeMap();
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public void run() {
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for (int i = 0; i < 20; i++) {
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testHomogeneousCompaction();
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}
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}
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public static void testHomogeneousCompaction() {
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final boolean supportHSC = supportHomogeneousSpaceCompact();
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if (!supportHSC) {
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return;
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}
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Object o = new Object();
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long addressBefore = objectAddress(o);
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allocateStuff();
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final boolean success = performHomogeneousSpaceCompact();
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allocateStuff();
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if (!success) {
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System.out.println("error: Expected " + supportHSC + " but got " + success);
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}
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allocateStuff();
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long addressAfter = objectAddress(o);
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// This relies on the compaction copying from one space to another space and there being
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// no overlap.
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if (addressBefore == addressAfter) {
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System.out.println("error: Expected different adddress " + addressBefore + " vs " +
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addressAfter);
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}
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}
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private static void allocateStuff() {
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for (int i = 0; i < 1000; ++i) {
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Object o = new Object();
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treeMap.put(o.hashCode(), o);
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}
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}
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// Methods to get access to ART internals.
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private static native boolean supportHomogeneousSpaceCompact();
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private static native boolean performHomogeneousSpaceCompact();
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private static native long objectAddress(Object object);
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}
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