--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/test/hotspot/jtreg/compiler/unsafe/OpaqueAccesses.java Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,191 @@
+/*
+ * Copyright (c) 2016, Oracle and/or its affiliates. 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. Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * 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 8155781
+ * @modules java.base/jdk.internal.misc
+ *
+ * @run main/bootclasspath/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:+UnlockDiagnosticVMOptions
+ * -XX:-TieredCompilation -Xbatch
+ * -XX:+UseCompressedOops -XX:+UseCompressedClassPointers
+ * -XX:CompileCommand=dontinline,compiler.unsafe.OpaqueAccesses::test*
+ * compiler.unsafe.OpaqueAccesses
+ * @run main/bootclasspath/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:+UnlockDiagnosticVMOptions
+ * -XX:-TieredCompilation -Xbatch
+ * -XX:+UseCompressedOops -XX:-UseCompressedClassPointers
+ * -XX:CompileCommand=dontinline,compiler.unsafe.OpaqueAccesses::test*
+ * compiler.unsafe.OpaqueAccesses
+ * @run main/bootclasspath/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:+UnlockDiagnosticVMOptions
+ * -XX:-TieredCompilation -Xbatch
+ * -XX:-UseCompressedOops -XX:+UseCompressedClassPointers
+ * -XX:CompileCommand=dontinline,compiler.unsafe.OpaqueAccesses::test*
+ * compiler.unsafe.OpaqueAccesses
+ * @run main/bootclasspath/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:+UnlockDiagnosticVMOptions
+ * -XX:-TieredCompilation -Xbatch
+ * -XX:-UseCompressedOops -XX:-UseCompressedClassPointers
+ * -XX:CompileCommand=dontinline,compiler.unsafe.OpaqueAccesses::test*
+ * compiler.unsafe.OpaqueAccesses
+ */
+package compiler.unsafe;
+
+import jdk.internal.misc.Unsafe;
+
+import java.lang.reflect.Field;
+
+public class OpaqueAccesses {
+ private static final Unsafe UNSAFE = Unsafe.getUnsafe();
+
+ private static final Object INSTANCE = new OpaqueAccesses();
+
+ private static final Object[] ARRAY = new Object[10];
+
+ private static final long F_OFFSET;
+ private static final long E_OFFSET;
+
+ static {
+ try {
+ Field field = OpaqueAccesses.class.getDeclaredField("f");
+ F_OFFSET = UNSAFE.objectFieldOffset(field);
+
+ E_OFFSET = UNSAFE.arrayBaseOffset(ARRAY.getClass());
+ } catch (NoSuchFieldException e) {
+ throw new Error(e);
+ }
+ }
+
+ private Object f = new Object();
+ private long l1, l2;
+
+ static Object testFixedOffsetField(Object o) {
+ return UNSAFE.getObject(o, F_OFFSET);
+ }
+
+ static int testFixedOffsetHeader0(Object o) {
+ return UNSAFE.getInt(o, 0);
+ }
+
+ static int testFixedOffsetHeader4(Object o) {
+ return UNSAFE.getInt(o, 4);
+ }
+
+ static int testFixedOffsetHeader8(Object o) {
+ return UNSAFE.getInt(o, 8);
+ }
+
+ static int testFixedOffsetHeader12(Object o) {
+ return UNSAFE.getInt(o, 12);
+ }
+
+ static int testFixedOffsetHeader16(Object o) {
+ return UNSAFE.getInt(o, 16);
+ }
+
+ static int testFixedOffsetHeader17(Object o) {
+ return UNSAFE.getIntUnaligned(o, 17);
+ }
+
+ static Object testFixedBase(long off) {
+ return UNSAFE.getObject(INSTANCE, off);
+ }
+
+ static Object testOpaque(Object o, long off) {
+ return UNSAFE.getObject(o, off);
+ }
+
+ static int testFixedOffsetHeaderArray0(Object[] arr) {
+ return UNSAFE.getInt(arr, 0);
+ }
+
+ static int testFixedOffsetHeaderArray4(Object[] arr) {
+ return UNSAFE.getInt(arr, 4);
+ }
+
+ static int testFixedOffsetHeaderArray8(Object[] arr) {
+ return UNSAFE.getInt(arr, 8);
+ }
+
+ static int testFixedOffsetHeaderArray12(Object[] arr) {
+ return UNSAFE.getInt(arr, 12);
+ }
+
+ static int testFixedOffsetHeaderArray16(Object[] arr) {
+ return UNSAFE.getInt(arr, 16);
+ }
+
+ static int testFixedOffsetHeaderArray17(Object[] arr) {
+ return UNSAFE.getIntUnaligned(arr, 17);
+ }
+
+ static Object testFixedOffsetArray(Object[] arr) {
+ return UNSAFE.getObject(arr, E_OFFSET);
+ }
+
+ static Object testFixedBaseArray(long off) {
+ return UNSAFE.getObject(ARRAY, off);
+ }
+
+ static Object testOpaqueArray(Object[] o, long off) {
+ return UNSAFE.getObject(o, off);
+ }
+
+ static final long ADDR = UNSAFE.allocateMemory(10);
+ static boolean flag;
+
+ static int testMixedAccess() {
+ flag = !flag;
+ Object o = (flag ? INSTANCE : null);
+ long off = (flag ? F_OFFSET : ADDR);
+ return UNSAFE.getInt(o, off);
+ }
+
+ public static void main(String[] args) {
+ for (int i = 0; i < 20_000; i++) {
+ // Instance
+ testFixedOffsetField(INSTANCE);
+ testFixedOffsetHeader0(INSTANCE);
+ testFixedOffsetHeader4(INSTANCE);
+ testFixedOffsetHeader8(INSTANCE);
+ testFixedOffsetHeader12(INSTANCE);
+ testFixedOffsetHeader16(INSTANCE);
+ testFixedOffsetHeader17(INSTANCE);
+ testFixedBase(F_OFFSET);
+ testOpaque(INSTANCE, F_OFFSET);
+ testMixedAccess();
+
+ // Array
+ testFixedOffsetHeaderArray0(ARRAY);
+ testFixedOffsetHeaderArray4(ARRAY);
+ testFixedOffsetHeaderArray8(ARRAY);
+ testFixedOffsetHeaderArray12(ARRAY);
+ testFixedOffsetHeaderArray16(ARRAY);
+ testFixedOffsetHeaderArray17(ARRAY);
+ testFixedOffsetArray(ARRAY);
+ testFixedBaseArray(E_OFFSET);
+ testOpaqueArray(ARRAY, E_OFFSET);
+ }
+ System.out.println("TEST PASSED");
+ }
+}