1 /*
   2  * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 /*
  25  * @test
  26  * @run testng/othervm -Xverify:none -XX:+EnableMVT -XX:+ValueArrayFlatten MVTAccessCheck
  27  * @run testng/othervm -Xverify:none -XX:+EnableMVT -XX:-ValueArrayFlatten MVTAccessCheck
  28  * @run testng/othervm -Xverify:none -XX:+EnableMVT -Dvalhalla.enableValueLambdaForms=true MVTAccessCheck
  29  * @run testng/othervm -Xverify:none -XX:+EnableMVT -Dvalhalla.enableValueLambdaForms=true -Dvalhalla.enablePoolPatches=true MVTAccessCheck
  30  */
  31 
  32 import jdk.experimental.value.ValueType;
  33 import org.testng.Assert;
  34 import org.testng.annotations.Test;
  35 
  36 import java.lang.invoke.MethodHandle;
  37 import java.lang.invoke.MethodHandles;
  38 
  39 import static org.testng.Assert.assertEquals;
  40 import static org.testng.Assert.assertTrue;
  41 
  42 @Test
  43 public class MVTAccessCheck {
  44 
  45     static final ValueType<?> VT_Point = ValueType.forClass(Point.class);
  46     static final ValueType<?> VT_PrivatePoint = ValueType.forClass(PrivatePoint.class);
  47 
  48     static final String[] FIELD_NAMES = {"x", "y", "z"};
  49     static final  Class<?>[] FIELD_TYPES = {int.class, short.class, short.class};
  50 
  51     public void testGetter() throws Throwable {
  52         for (int i = 0; i < FIELD_NAMES.length; i++) {
  53             final int offset = i;
  54             assertThrow(() -> VT_PrivatePoint.findGetter(
  55                     MethodHandles.lookup(), FIELD_NAMES[offset], FIELD_TYPES[offset]), IllegalAccessException.class);
  56         }
  57     }
  58 
  59     public void testWither() throws Throwable {
  60         testWither(VT_Point);
  61         testWither(VT_PrivatePoint);
  62     }
  63 
  64     void testWither(ValueType<?> vt) throws Throwable {
  65         for (int i = 0; i < FIELD_NAMES.length; i++) {
  66             final int offset = i;
  67             assertThrow(() -> vt.findWither(
  68                     MethodHandles.lookup(), FIELD_NAMES[offset], FIELD_TYPES[offset]), IllegalAccessException.class);
  69         }
  70     }
  71 
  72     public void testSubstitutability() throws Throwable {
  73         PrivatePoint[] pts = {new PrivatePoint(1, (short) 6, (short) 3), new PrivatePoint(1, (short) 2, (short) 3)};
  74 
  75         MethodHandle substTest = VT_PrivatePoint.substitutabilityTest();
  76         for (PrivatePoint p1 : pts) {
  77             for (PrivatePoint p2 : pts) {
  78                 boolean b1 = (boolean) substTest.invoke(p1, p2);
  79                 boolean b2 = p1.equals(p2);
  80                 assertEquals(b1, b2);
  81             }
  82         }
  83 
  84         MethodHandle hash = VT_PrivatePoint.substitutabilityHashCode();
  85         for (PrivatePoint p1 : pts) {
  86             for (PrivatePoint p2 : pts) {
  87                 boolean vHashEq = (int) hash.invoke(p1) == (int) hash.invoke(p2);
  88                 boolean rHashEq = p1.hashCode() == p2.hashCode();
  89                 assertEquals(vHashEq, rHashEq);
  90             }
  91         }
  92     }
  93 
  94     interface MHAction {
  95         void run() throws Throwable;
  96     }
  97 
  98     static void assertThrow(MHAction action, Class<? extends Throwable> ex) {
  99         try {
 100             action.run();
 101             Assert.fail();
 102         } catch (Throwable t) {
 103             assertTrue(ex.isAssignableFrom(t.getClass()));
 104         }
 105     }
 106 }
--- EOF ---