/*
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* Copyright (C) 2015 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.lang.reflect.Field;
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import sun.misc.Unsafe;
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public class Main {
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private static void assertLongEquals(long expected, long result) {
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if (expected != result) {
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throw new Error("Expected: " + expected + ", found: " + result);
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}
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}
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private static Unsafe getUnsafe() throws Exception {
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Class<?> unsafeClass = Class.forName("sun.misc.Unsafe");
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Field f = unsafeClass.getDeclaredField("theUnsafe");
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f.setAccessible(true);
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return (Unsafe) f.get(null);
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}
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public static void main(String[] args) throws Exception {
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System.loadLibrary(args[0]);
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Unsafe unsafe = getUnsafe();
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testUnsafeGetLong(unsafe);
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}
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public static void testUnsafeGetLong(Unsafe unsafe) throws Exception {
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TestClass test = new TestClass();
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Field longField = TestClass.class.getDeclaredField("longVar");
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long lvar = unsafe.objectFieldOffset(longField);
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lvar = unsafe.getLong(test, lvar);
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assertLongEquals(1122334455667788L, lvar);
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}
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private static class TestClass {
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public long longVar = 1122334455667788L;
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}
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}
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