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