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/*
* Copyright (C) 2014 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.lang.reflect.Field;
import sun.misc.Unsafe;
public class Main {
static {
System.loadLibrary("arttest");
}
private static void check(int actual, int expected, String msg) {
if (actual != expected) {
System.out.println(msg + " : " + actual + " != " + expected);
System.exit(1);
}
}
private static void check(long actual, long expected, String msg) {
if (actual != expected) {
System.out.println(msg + " : " + actual + " != " + expected);
System.exit(1);
}
}
private static Unsafe getUnsafe() throws Exception {
Class<?> unsafeClass = Class.forName("sun.misc.Unsafe");
Field f = unsafeClass.getDeclaredField("theUnsafe");
f.setAccessible(true);
return (Unsafe) f.get(null);
}
public static void main(String[] args) throws Exception {
Unsafe unsafe = getUnsafe();
check(unsafe.arrayBaseOffset(boolean[].class), vmArrayBaseOffset(boolean[].class),
"Unsafe.arrayBaseOffset(boolean[])");
check(unsafe.arrayBaseOffset(byte[].class), vmArrayBaseOffset(byte[].class),
"Unsafe.arrayBaseOffset(byte[])");
check(unsafe.arrayBaseOffset(char[].class), vmArrayBaseOffset(char[].class),
"Unsafe.arrayBaseOffset(char[])");
check(unsafe.arrayBaseOffset(double[].class), vmArrayBaseOffset(double[].class),
"Unsafe.arrayBaseOffset(double[])");
check(unsafe.arrayBaseOffset(float[].class), vmArrayBaseOffset(float[].class),
"Unsafe.arrayBaseOffset(float[])");
check(unsafe.arrayBaseOffset(int[].class), vmArrayBaseOffset(int[].class),
"Unsafe.arrayBaseOffset(int[])");
check(unsafe.arrayBaseOffset(long[].class), vmArrayBaseOffset(long[].class),
"Unsafe.arrayBaseOffset(long[])");
check(unsafe.arrayBaseOffset(Object[].class), vmArrayBaseOffset(Object[].class),
"Unsafe.arrayBaseOffset(Object[])");
check(unsafe.arrayIndexScale(boolean[].class), vmArrayIndexScale(boolean[].class),
"Unsafe.arrayIndexScale(boolean[])");
check(unsafe.arrayIndexScale(byte[].class), vmArrayIndexScale(byte[].class),
"Unsafe.arrayIndexScale(byte[])");
check(unsafe.arrayIndexScale(char[].class), vmArrayIndexScale(char[].class),
"Unsafe.arrayIndexScale(char[])");
check(unsafe.arrayIndexScale(double[].class), vmArrayIndexScale(double[].class),
"Unsafe.arrayIndexScale(double[])");
check(unsafe.arrayIndexScale(float[].class), vmArrayIndexScale(float[].class),
"Unsafe.arrayIndexScale(float[])");
check(unsafe.arrayIndexScale(int[].class), vmArrayIndexScale(int[].class),
"Unsafe.arrayIndexScale(int[])");
check(unsafe.arrayIndexScale(long[].class), vmArrayIndexScale(long[].class),
"Unsafe.arrayIndexScale(long[])");
check(unsafe.arrayIndexScale(Object[].class), vmArrayIndexScale(Object[].class),
"Unsafe.arrayIndexScale(Object[])");
TestClass t = new TestClass();
int intValue = 12345678;
Field intField = TestClass.class.getDeclaredField("intVar");
long intOffset = unsafe.objectFieldOffset(intField);
check(unsafe.getInt(t, intOffset), 0, "Unsafe.getInt(Object, long) - initial");
unsafe.putInt(t, intOffset, intValue);
check(t.intVar, intValue, "Unsafe.putInt(Object, long, int)");
check(unsafe.getInt(t, intOffset), intValue, "Unsafe.getInt(Object, long)");
Field longField = TestClass.class.getDeclaredField("longVar");
long longOffset = unsafe.objectFieldOffset(longField);
long longValue = 1234567887654321L;
check(unsafe.getLong(t, longOffset), 0, "Unsafe.getLong(Object, long) - initial");
unsafe.putLong(t, longOffset, longValue);
check(t.longVar, longValue, "Unsafe.putLong(Object, long, long)");
check(unsafe.getLong(t, longOffset), longValue, "Unsafe.getLong(Object, long)");
}
private static class TestClass {
public int intVar = 0;
public long longVar = 0;
}
private static native int vmArrayBaseOffset(Class clazz);
private static native int vmArrayIndexScale(Class clazz);
}
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