blob: 03038a67c524864d931c22c2099052395624336c [file] [log] [blame]
/*
* 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.
*/
package art;
import java.lang.reflect.Field;
import java.util.Arrays;
public class Test920 {
public static void run() throws Exception {
doTest();
}
public static void doTest() throws Exception {
testObjectSize(new Object());
testObjectSize(new Object());
testObjectSize(new int[0]);
testObjectSize(new int[1]);
testObjectSize(new int[2]);
testObjectSize(new double[0]);
testObjectSize(new double[1]);
testObjectSize(new double[2]);
testObjectSize(new String("abc"));
testObjectSize(new String("wxyz"));
testObjectHash();
}
private static void testObjectSize(Object o) {
System.out.println(o.getClass() + " " + getObjectSize(o));
}
private static void testObjectHash() {
Object[] objects = new Object[] {
new Object(),
new Object(),
new MyHash(1),
new MyHash(1),
new MyHash(2)
};
int hashes[] = new int[objects.length];
for (int i = 0; i < objects.length; i++) {
hashes[i] = getObjectHashCode(objects[i]);
}
// Implementation detail: we use the identity hashcode, for simplicity.
for (int i = 0; i < objects.length; i++) {
int ihash = System.identityHashCode(objects[i]);
if (hashes[i] != ihash) {
throw new RuntimeException(objects[i] + ": " + hashes[i] + " vs " + ihash);
}
}
Runtime.getRuntime().gc();
Runtime.getRuntime().gc();
for (int i = 0; i < objects.length; i++) {
int newhash = getObjectHashCode(objects[i]);
if (hashes[i] != newhash) {
throw new RuntimeException(objects[i] + ": " + hashes[i] + " vs " + newhash);
}
}
}
private static native long getObjectSize(Object o);
private static native int getObjectHashCode(Object o);
private static class MyHash {
private int hash;
public MyHash(int h) {
hash = h;
}
public int hashCode() {
return hash;
}
}
}