/*
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* Copyright (C) 2014 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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public class Main {
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public static void main(String[] args) {
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Object o = new Object();
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// Generate a hashcode and put it in the lock word.
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int hashOrig = o.hashCode();
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int hashInflated = 0;
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int hashSystemOrig = System.identityHashCode(o);
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int hashSystemInflated = 0;
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// Inflate the monitor to move the hash from the lock word to the Monitor.
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synchronized (o) {
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hashInflated = o.hashCode();
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hashSystemInflated = System.identityHashCode(o);
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}
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// Make sure that all the hashes agree.
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if (hashOrig != hashInflated || hashOrig != hashSystemOrig ||
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hashSystemOrig != hashSystemInflated) {
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System.out.println("hash codes dont match: " + hashOrig + " " + hashInflated + " " +
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hashSystemOrig + " " + hashSystemInflated);
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}
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System.out.println("Done.");
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}
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}
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