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/*
* @test
* @bug 8143628
* @summary Test unsafe access for short
*
* @modules java.base/jdk.internal.misc:+open
* @run testng/othervm -Diters=100 -Xint compiler.unsafe.JdkInternalMiscUnsafeAccessTestShort
* @run testng/othervm -Diters=20000 -XX:TieredStopAtLevel=1 compiler.unsafe.JdkInternalMiscUnsafeAccessTestShort
* @run testng/othervm -Diters=20000 -XX:-TieredCompilation compiler.unsafe.JdkInternalMiscUnsafeAccessTestShort
* @run testng/othervm -Diters=20000 compiler.unsafe.JdkInternalMiscUnsafeAccessTestShort
*/
package compiler.unsafe;
import org.testng.annotations.Test;
import java.lang.reflect.Field;
import static org.testng.Assert.*;
public class JdkInternalMiscUnsafeAccessTestShort {
static final int ITERS = Integer.getInteger("iters", 1);
static final int WEAK_ATTEMPTS = Integer.getInteger("weakAttempts", 10);
static final jdk.internal.misc.Unsafe UNSAFE;
static final long V_OFFSET;
static final Object STATIC_V_BASE;
static final long STATIC_V_OFFSET;
static int ARRAY_OFFSET;
static int ARRAY_SHIFT;
static {
try {
Field f = jdk.internal.misc.Unsafe.class.getDeclaredField("theUnsafe");
f.setAccessible(true);
UNSAFE = (jdk.internal.misc.Unsafe) f.get(null);
} catch (Exception e) {
throw new RuntimeException("Unable to get Unsafe instance.", e);
}
try {
Field staticVField = JdkInternalMiscUnsafeAccessTestShort.class.getDeclaredField("static_v");
STATIC_V_BASE = UNSAFE.staticFieldBase(staticVField);
STATIC_V_OFFSET = UNSAFE.staticFieldOffset(staticVField);
} catch (Exception e) {
throw new RuntimeException(e);
}
try {
Field vField = JdkInternalMiscUnsafeAccessTestShort.class.getDeclaredField("v");
V_OFFSET = UNSAFE.objectFieldOffset(vField);
} catch (Exception e) {
throw new RuntimeException(e);
}
ARRAY_OFFSET = UNSAFE.arrayBaseOffset(short[].class);
int ascale = UNSAFE.arrayIndexScale(short[].class);
ARRAY_SHIFT = 31 - Integer.numberOfLeadingZeros(ascale);
}
static short static_v;
short v;
@Test
public void testFieldInstance() {
JdkInternalMiscUnsafeAccessTestShort t = new JdkInternalMiscUnsafeAccessTestShort();
for (int c = 0; c < ITERS; c++) {
testAccess(t, V_OFFSET);
}
}
@Test
public void testFieldStatic() {
for (int c = 0; c < ITERS; c++) {
testAccess(STATIC_V_BASE, STATIC_V_OFFSET);
}
}
@Test
public void testArray() {
short[] array = new short[10];
for (int c = 0; c < ITERS; c++) {
for (int i = 0; i < array.length; i++) {
testAccess(array, (((long) i) << ARRAY_SHIFT) + ARRAY_OFFSET);
}
}
}
@Test
public void testArrayOffHeap() {
int size = 10;
long address = UNSAFE.allocateMemory(size << ARRAY_SHIFT);
try {
for (int c = 0; c < ITERS; c++) {
for (int i = 0; i < size; i++) {
testAccess(null, (((long) i) << ARRAY_SHIFT) + address);
}
}
} finally {
UNSAFE.freeMemory(address);
}
}
@Test
public void testArrayOffHeapDirect() {
int size = 10;
long address = UNSAFE.allocateMemory(size << ARRAY_SHIFT);
try {
for (int c = 0; c < ITERS; c++) {
for (int i = 0; i < size; i++) {
testAccess((((long) i) << ARRAY_SHIFT) + address);
}
}
} finally {
UNSAFE.freeMemory(address);
}
}
static void testAccess(Object base, long offset) {
// Plain
{
UNSAFE.putShort(base, offset, (short)0x0123);
short x = UNSAFE.getShort(base, offset);
assertEquals(x, (short)0x0123, "set short value");
}
// Volatile
{
UNSAFE.putShortVolatile(base, offset, (short)0x4567);
short x = UNSAFE.getShortVolatile(base, offset);
assertEquals(x, (short)0x4567, "putVolatile short value");
}
// Lazy
{
UNSAFE.putShortRelease(base, offset, (short)0x0123);
short x = UNSAFE.getShortAcquire(base, offset);
assertEquals(x, (short)0x0123, "putRelease short value");
}
// Opaque
{
UNSAFE.putShortOpaque(base, offset, (short)0x4567);
short x = UNSAFE.getShortOpaque(base, offset);
assertEquals(x, (short)0x4567, "putOpaque short value");
}
// Unaligned
{
UNSAFE.putShortUnaligned(base, offset, (short)0x4567);
short x = UNSAFE.getShortUnaligned(base, offset);
assertEquals(x, (short)0x4567, "putUnaligned short value");
}
{
UNSAFE.putShortUnaligned(base, offset, (short)0x0123, true);
short x = UNSAFE.getShortUnaligned(base, offset, true);
assertEquals(x, (short)0x0123, "putUnaligned big endian short value");
}
{
UNSAFE.putShortUnaligned(base, offset, (short)0x4567, false);
short x = UNSAFE.getShortUnaligned(base, offset, false);
assertEquals(x, (short)0x4567, "putUnaligned little endian short value");
}
UNSAFE.putShort(base, offset, (short)0x0123);
// Compare
{
boolean r = UNSAFE.compareAndSwapShort(base, offset, (short)0x0123, (short)0x4567);
assertEquals(r, true, "success compareAndSwap short");
short x = UNSAFE.getShort(base, offset);
assertEquals(x, (short)0x4567, "success compareAndSwap short value");
}
{
boolean r = UNSAFE.compareAndSwapShort(base, offset, (short)0x0123, (short)0x89AB);
assertEquals(r, false, "failing compareAndSwap short");
short x = UNSAFE.getShort(base, offset);
assertEquals(x, (short)0x4567, "failing compareAndSwap short value");
}
// Advanced compare
{
short r = UNSAFE.compareAndExchangeShortVolatile(base, offset, (short)0x4567, (short)0x0123);
assertEquals(r, (short)0x4567, "success compareAndExchangeVolatile short");
short x = UNSAFE.getShort(base, offset);
assertEquals(x, (short)0x0123, "success compareAndExchangeVolatile short value");
}
{
short r = UNSAFE.compareAndExchangeShortVolatile(base, offset, (short)0x4567, (short)0x89AB);
assertEquals(r, (short)0x0123, "failing compareAndExchangeVolatile short");
short x = UNSAFE.getShort(base, offset);
assertEquals(x, (short)0x0123, "failing compareAndExchangeVolatile short value");
}
{
short r = UNSAFE.compareAndExchangeShortAcquire(base, offset, (short)0x0123, (short)0x4567);
assertEquals(r, (short)0x0123, "success compareAndExchangeAcquire short");
short x = UNSAFE.getShort(base, offset);
assertEquals(x, (short)0x4567, "success compareAndExchangeAcquire short value");
}
{
short r = UNSAFE.compareAndExchangeShortAcquire(base, offset, (short)0x0123, (short)0x89AB);
assertEquals(r, (short)0x4567, "failing compareAndExchangeAcquire short");
short x = UNSAFE.getShort(base, offset);
assertEquals(x, (short)0x4567, "failing compareAndExchangeAcquire short value");
}
{
short r = UNSAFE.compareAndExchangeShortRelease(base, offset, (short)0x4567, (short)0x0123);
assertEquals(r, (short)0x4567, "success compareAndExchangeRelease short");
short x = UNSAFE.getShort(base, offset);
assertEquals(x, (short)0x0123, "success compareAndExchangeRelease short value");
}
{
short r = UNSAFE.compareAndExchangeShortRelease(base, offset, (short)0x4567, (short)0x89AB);
assertEquals(r, (short)0x0123, "failing compareAndExchangeRelease short");
short x = UNSAFE.getShort(base, offset);
assertEquals(x, (short)0x0123, "failing compareAndExchangeRelease short value");
}
{
boolean success = false;
for (int c = 0; c < WEAK_ATTEMPTS && !success; c++) {
success = UNSAFE.weakCompareAndSwapShort(base, offset, (short)0x0123, (short)0x4567);
}
assertEquals(success, true, "weakCompareAndSwap short");
short x = UNSAFE.getShort(base, offset);
assertEquals(x, (short)0x4567, "weakCompareAndSwap short value");
}
{
boolean success = false;
for (int c = 0; c < WEAK_ATTEMPTS && !success; c++) {
success = UNSAFE.weakCompareAndSwapShortAcquire(base, offset, (short)0x4567, (short)0x0123);
}
assertEquals(success, true, "weakCompareAndSwapAcquire short");
short x = UNSAFE.getShort(base, offset);
assertEquals(x, (short)0x0123, "weakCompareAndSwapAcquire short");
}
{
boolean success = false;
for (int c = 0; c < WEAK_ATTEMPTS && !success; c++) {
success = UNSAFE.weakCompareAndSwapShortRelease(base, offset, (short)0x0123, (short)0x4567);
}
assertEquals(success, true, "weakCompareAndSwapRelease short");
short x = UNSAFE.getShort(base, offset);
assertEquals(x, (short)0x4567, "weakCompareAndSwapRelease short");
}
{
boolean success = false;
for (int c = 0; c < WEAK_ATTEMPTS && !success; c++) {
success = UNSAFE.weakCompareAndSwapShortVolatile(base, offset, (short)0x4567, (short)0x0123);
}
assertEquals(success, true, "weakCompareAndSwapVolatile short");
short x = UNSAFE.getShort(base, offset);
assertEquals(x, (short)0x0123, "weakCompareAndSwapVolatile short");
}
UNSAFE.putShort(base, offset, (short)0x4567);
// Compare set and get
{
short o = UNSAFE.getAndSetShort(base, offset, (short)0x0123);
assertEquals(o, (short)0x4567, "getAndSet short");
short x = UNSAFE.getShort(base, offset);
assertEquals(x, (short)0x0123, "getAndSet short value");
}
UNSAFE.putShort(base, offset, (short)0x0123);
// get and add, add and get
{
short o = UNSAFE.getAndAddShort(base, offset, (short)0x4567);
assertEquals(o, (short)0x0123, "getAndAdd short");
short x = UNSAFE.getShort(base, offset);
assertEquals(x, (short)((short)0x0123 + (short)0x4567), "getAndAdd short");
}
}
static void testAccess(long address) {
// Plain
{
UNSAFE.putShort(address, (short)0x0123);
short x = UNSAFE.getShort(address);
assertEquals(x, (short)0x0123, "set short value");
}
}
}