/*
* Copyright (c) 2016 SAP SE. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/*
* @test
* @bug 8158260
* @summary Test unaligned Unsafe accesses
* @modules java.base/jdk.internal.misc:+open
*
* @run main/othervm -Diters=20000 -XX:-UseOnStackReplacement -XX:-BackgroundCompilation
* compiler.unsafe.JdkInternalMiscUnsafeUnalignedAccess
* @author volker.simonis@gmail.com
*/
package compiler.unsafe;
import jdk.internal.misc.Unsafe;
import java.lang.reflect.Field;
import java.nio.ByteOrder;
public class JdkInternalMiscUnsafeUnalignedAccess {
static final int ITERS = Integer.getInteger("iters", 20_000);
private static final boolean BIG_ENDIAN = ByteOrder.nativeOrder().equals(ByteOrder.BIG_ENDIAN);
private static final Unsafe UNSAFE;
private static final int SIZE = 1024;
private static long memory;
static {
try {
Field unsafeField = Unsafe.class.getDeclaredField("theUnsafe");
unsafeField.setAccessible(true);
UNSAFE = (Unsafe) unsafeField.get(null);
}
catch (Exception e) {
throw new RuntimeException("Unable to get Unsafe instance.", e);
}
}
static int getInt_0() {
return UNSAFE.getInt(memory + 0);
}
static int getInt_1() {
return UNSAFE.getInt(memory + 1);
}
static int getInt_4() {
return UNSAFE.getInt(memory + 4);
}
static int getInt_17() {
return UNSAFE.getInt(memory + 17);
}
static long getIntAsLong_0() {
return UNSAFE.getInt(memory + 0);
}
static long getIntAsLong_1() {
return UNSAFE.getInt(memory + 1);
}
static long getIntAsLong_4() {
return UNSAFE.getInt(memory + 4);
}
static long getIntAsLong_17() {
return UNSAFE.getInt(memory + 17);
}
static long getLong_0() {
return UNSAFE.getLong(memory + 0);
}
static long getLong_1() {
return UNSAFE.getLong(memory + 1);
}
static long getLong_4() {
return UNSAFE.getLong(memory + 4);
}
static long getLong_8() {
return UNSAFE.getLong(memory + 8);
}
static long getLong_17() {
return UNSAFE.getLong(memory + 17);
}
static void putInt_0(int i) {
UNSAFE.putInt(memory + 0, i);
}
static void putInt_1(int i) {
UNSAFE.putInt(memory + 1, i);
}
static void putInt_4(int i) {
UNSAFE.putInt(memory + 4, i);
}
static void putInt_17(int i) {
UNSAFE.putInt(memory + 17, i);
}
static void putLong_0(long l) {
UNSAFE.putLong(memory + 0, l);
}
static void putLong_1(long l) {
UNSAFE.putLong(memory + 1, l);
}
static void putLong_4(long l) {
UNSAFE.putLong(memory + 4, l);
}
static void putLong_8(long l) {
UNSAFE.putLong(memory + 8, l);
}
static void putLong_17(long l) {
UNSAFE.putLong(memory + 17, l);
}
public static void main(String[] args) throws Exception {
if (!UNSAFE.unalignedAccess()) {
System.out.println("Platform is not supporting unaligned access - nothing to test.");
return;
}
memory = UNSAFE.allocateMemory(SIZE);
UNSAFE.putInt(memory + 0, 0x00112233);
UNSAFE.putInt(memory + 4, 0x44556677);
UNSAFE.putInt(memory + 8, 0x8899aabb);
UNSAFE.putInt(memory + 12, 0xccddeeff);
UNSAFE.putInt(memory + 16, 0x01234567);
UNSAFE.putInt(memory + 20, 0x89abcdef);
UNSAFE.putInt(memory + 24, 0x01234567);
// Unsafe.getInt()
int res;
for (int i = 0; i < ITERS; i++) {
res = getInt_0();
if (res != 0x00112233) {
throw new Exception(res + " != 0x00112233");
}
}
for (int i = 0; i < ITERS; i++) {
res = getInt_1();
if (res != (BIG_ENDIAN ? 0x11223344 : 0x77001122)) {
throw new Exception(res + " != " + (BIG_ENDIAN ? 0x11223344 : 0x77001122));
}
}
for (int i = 0; i < ITERS; i++) {
res = getInt_4();
if (res != 0x44556677) {
throw new Exception(res + " != 0x44556677");
}
}
for (int i = 0; i < ITERS; i++) {
res = getInt_17();
if (res != (BIG_ENDIAN ? 0x23456789 : 0xef012345)) {
throw new Exception(res + " != " + (BIG_ENDIAN ? 0x23456789 : 0xef012345));
}
}
// (long)Unsafe.getInt()
long lres;
for (int i = 0; i < ITERS; i++) {
lres = getIntAsLong_0();
if (lres != (long)0x00112233) {
throw new Exception(lres + " != 0x00112233");
}
}
for (int i = 0; i < ITERS; i++) {
lres = getIntAsLong_1();
if (lres != (BIG_ENDIAN ? (long)0x11223344 : (long)0x77001122)) {
throw new Exception(lres + " != " + (BIG_ENDIAN ? (long)0x11223344 : (long)0x77001122));
}
}
for (int i = 0; i < ITERS; i++) {
lres = getIntAsLong_4();
if (lres != (long)0x44556677) {
throw new Exception(lres + " != 0x44556677");
}
}
for (int i = 0; i < ITERS; i++) {
lres = getIntAsLong_17();
if (lres != (BIG_ENDIAN ? (long)0x23456789 : (long)0xef012345)) {
throw new Exception(lres + " != " + (BIG_ENDIAN ? (long)0x23456789 : (long)0xef012345));
}
}
// Unsafe.getLong()
for (int i = 0; i < ITERS; i++) {
lres = getLong_0();
if (lres != (BIG_ENDIAN ? 0x0011223344556677L : 0x4455667700112233L)) {
throw new Exception(lres + " != " + (BIG_ENDIAN ? 0x0011223344556677L : 0x4455667700112233L));
}
}
for (int i = 0; i < ITERS; i++) {
lres = getLong_1();
if (lres != (BIG_ENDIAN ? 0x1122334455667788L : 0xbb44556677001122L)) {
throw new Exception(lres + " != " + (BIG_ENDIAN ? 0x1122334455667788L : 0xbb44556677001122L));
}
}
for (int i = 0; i < ITERS; i++) {
lres = getLong_4();
if (lres != (BIG_ENDIAN ? 0x445566778899aabbL : 0x8899aabb44556677L)) {
throw new Exception(lres + " != " + (BIG_ENDIAN ? 0x445566778899aabbL : 0x8899aabb44556677L));
}
}
for (int i = 0; i < ITERS; i++) {
lres = getLong_8();
if (lres != (BIG_ENDIAN ? 0x8899aabbccddeeffL : 0xccddeeff8899aabbL)) {
throw new Exception(lres + " != " + (BIG_ENDIAN ? 0x8899aabbccddeeffL : 0xccddeeff8899aabbL));
}
}
for (int i = 0; i < ITERS; i++) {
lres = getLong_17();
if (lres != (BIG_ENDIAN ? 0x23456789abcdef01L : 0x6789abcdef012345L)) {
throw new Exception(lres + " != " + (BIG_ENDIAN ? 0x23456789abcdef01L : 0x6789abcdef012345L));
}
}
// Unsafe.putInt()
for (int i = 0; i < ITERS; i++) {
putInt_0(0x00112233);
res = getInt_0();
if (res != 0x00112233) {
throw new Exception(res + " != 0x00112233");
}
}
for (int i = 0; i < ITERS; i++) {
putInt_1(BIG_ENDIAN ? 0x11223344 : 0x77001122);
res = getInt_1();
if (res != (BIG_ENDIAN ? 0x11223344 : 0x77001122)) {
throw new Exception(res + " != " + (BIG_ENDIAN ? 0x11223344 : 0x77001122));
}
}
for (int i = 0; i < ITERS; i++) {
putInt_4(0x44556677);
res = getInt_4();
if (res != 0x44556677) {
throw new Exception(res + " != 0x44556677");
}
}
for (int i = 0; i < ITERS; i++) {
putInt_17(BIG_ENDIAN ? 0x23456789 : 0xef012345);
res = getInt_17();
if (res != (BIG_ENDIAN ? 0x23456789 : 0xef012345)) {
throw new Exception(res + " != " + (BIG_ENDIAN ? 0x23456789 : 0xef012345));
}
}
// Unsafe.putLong()
for (int i = 0; i < ITERS; i++) {
putLong_0(BIG_ENDIAN ? 0x0011223344556677L : 0x4455667700112233L);
lres = getLong_0();
if (lres != (BIG_ENDIAN ? 0x0011223344556677L : 0x4455667700112233L)) {
throw new Exception(lres + " != " + (BIG_ENDIAN ? 0x0011223344556677L : 0x4455667700112233L));
}
}
for (int i = 0; i < ITERS; i++) {
putLong_1(BIG_ENDIAN ? 0x1122334455667788L : 0xbb44556677001122L);
lres = getLong_1();
if (lres != (BIG_ENDIAN ? 0x1122334455667788L : 0xbb44556677001122L)) {
throw new Exception(lres + " != " + (BIG_ENDIAN ? 0x1122334455667788L : 0xbb44556677001122L));
}
}
for (int i = 0; i < ITERS; i++) {
putLong_4(BIG_ENDIAN ? 0x445566778899aabbL : 0x8899aabb44556677L);
lres = getLong_4();
if (lres != (BIG_ENDIAN ? 0x445566778899aabbL : 0x8899aabb44556677L)) {
throw new Exception(lres + " != " + (BIG_ENDIAN ? 0x445566778899aabbL : 0x8899aabb44556677L));
}
}
for (int i = 0; i < ITERS; i++) {
putLong_8(BIG_ENDIAN ? 0x8899aabbccddeeffL : 0xccddeeff8899aabbL);
lres = getLong_8();
if (lres != (BIG_ENDIAN ? 0x8899aabbccddeeffL : 0xccddeeff8899aabbL)) {
throw new Exception(lres + " != " + (BIG_ENDIAN ? 0x8899aabbccddeeffL : 0xccddeeff8899aabbL));
}
}
for (int i = 0; i < ITERS; i++) {
putLong_17(BIG_ENDIAN ? 0x23456789abcdef01L : 0x6789abcdef012345L);
lres = getLong_17();
if (lres != (BIG_ENDIAN ? 0x23456789abcdef01L : 0x6789abcdef012345L)) {
throw new Exception(lres + " != " + (BIG_ENDIAN ? 0x23456789abcdef01L : 0x6789abcdef012345L));
}
}
}
}