1 /*
   2  * Copyright (c) 2015, 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.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package jdk.dynalink.support.test;
  27 
  28 import static jdk.dynalink.StandardNamespace.PROPERTY;
  29 import static jdk.dynalink.StandardOperation.GET;
  30 
  31 import java.lang.invoke.CallSite;
  32 import java.lang.invoke.MethodHandle;
  33 import java.lang.invoke.MethodHandles;
  34 import java.lang.invoke.MethodType;
  35 import java.util.ArrayList;
  36 import jdk.dynalink.CallSiteDescriptor;
  37 import jdk.dynalink.DynamicLinker;
  38 import jdk.dynalink.DynamicLinkerFactory;
  39 import jdk.dynalink.Operation;
  40 import jdk.dynalink.linker.GuardedInvocation;
  41 import jdk.dynalink.support.SimpleRelinkableCallSite;
  42 import org.testng.Assert;
  43 import org.testng.annotations.Test;
  44 
  45 public class CallSiteTest {
  46     private static final Operation GET_PROPERTY = GET.withNamespace(PROPERTY);
  47 
  48     @Test
  49     public void testInitialize() {
  50         final DynamicLinkerFactory factory = new DynamicLinkerFactory();
  51         final DynamicLinker linker = factory.createLinker();
  52         final MethodType mt = MethodType.methodType(Object.class, Object.class);
  53         final boolean[] initializeCalled = { Boolean.FALSE };
  54         linker.link(new SimpleRelinkableCallSite(new CallSiteDescriptor(
  55             MethodHandles.publicLookup(), GET_PROPERTY.named("DO_NOT_CARE"), mt)) {
  56                 @Override
  57                 public void initialize(final MethodHandle relinkAndInvoke) {
  58                     initializeCalled[0] = Boolean.TRUE;
  59                     super.initialize(relinkAndInvoke);
  60                 }
  61             });
  62 
  63         Assert.assertTrue(initializeCalled[0]);
  64     }
  65 
  66     @Test
  67     public void testRelink() {
  68         final DynamicLinkerFactory factory = new DynamicLinkerFactory();
  69         final DynamicLinker linker = factory.createLinker();
  70         final MethodType mt = MethodType.methodType(Object.class, Object.class);
  71         final boolean[] relinkCalled = { Boolean.FALSE };
  72         final CallSite cs = linker.link(new SimpleRelinkableCallSite(new CallSiteDescriptor(
  73             MethodHandles.publicLookup(), GET_PROPERTY.named("class"), mt)) {
  74                 @Override
  75                 public void relink(final GuardedInvocation guardedInvocation, final MethodHandle relinkAndInvoke) {
  76                     relinkCalled[0] = Boolean.TRUE;
  77                     super.relink(guardedInvocation, relinkAndInvoke);
  78                 }
  79             });
  80 
  81         Assert.assertFalse(relinkCalled[0]);
  82         try {
  83             cs.getTarget().invoke(new Object());
  84         } catch (final Throwable th) {}
  85 
  86         Assert.assertTrue(relinkCalled[0]);
  87     }
  88 
  89     @Test
  90     public void testResetAndRelink() {
  91         final DynamicLinkerFactory factory = new DynamicLinkerFactory();
  92         factory.setUnstableRelinkThreshold(1);
  93         final DynamicLinker linker = factory.createLinker();
  94         final MethodType mt = MethodType.methodType(Object.class, Object.class);
  95         final boolean[] resetAndRelinkCalled = { Boolean.FALSE };
  96         final CallSite cs = linker.link(new SimpleRelinkableCallSite(new CallSiteDescriptor(
  97             MethodHandles.publicLookup(), GET_PROPERTY.named("length"), mt)) {
  98                 @Override
  99                 public void resetAndRelink(final GuardedInvocation guardedInvocation, final MethodHandle relinkAndInvoke) {
 100                     resetAndRelinkCalled[0] = Boolean.TRUE;
 101                     super.resetAndRelink(guardedInvocation, relinkAndInvoke);
 102                 }
 103             });
 104 
 105         Assert.assertFalse(resetAndRelinkCalled[0]);
 106         try {
 107             cs.getTarget().invoke(new Object[] {});
 108         } catch (final Throwable th) {}
 109 
 110         Assert.assertFalse(resetAndRelinkCalled[0]);
 111         try {
 112             cs.getTarget().invoke(new ArrayList<Object>());
 113         } catch (final Throwable th) {}
 114 
 115         Assert.assertTrue(resetAndRelinkCalled[0]);
 116     }
 117 }