Merge

nashorn/src/jdk.dynalink/share/classes/jdk/dynalink/CallSiteDescriptor.java

@@ -83,7 +83,6 @@
 
 package jdk.dynalink;
 
-import java.lang.invoke.MethodHandles;
 import java.lang.invoke.MethodHandles.Lookup;
 import java.lang.invoke.MethodType;
 import java.util.Objects;
@@ -105,28 +104,28 @@ import java.util.Objects;
  * descriptors (typically, values passed in additional parameters to the
  * bootstrap method. Since the descriptors must be immutable, you can set up a
  * cache for equivalent descriptors to have the call sites share them.
+ * <p>
+ * The class extends {@link SecureLookupSupplier} for security-checked access to
+ * the {@code MethodHandles.Lookup} object it carries. This lookup should be used
+ * to find method handles to set as targets of the call site described by this
+ * descriptor.
  */
-public class CallSiteDescriptor {
-    private final MethodHandles.Lookup lookup;
+public class CallSiteDescriptor extends SecureLookupSupplier {
     private final Operation operation;
     private final MethodType methodType;
 
-    /**
-     * The name of a runtime permission to invoke the {@link #getLookup()}
-     * method.
-     */
-    public static final String GET_LOOKUP_PERMISSION_NAME = "dynalink.getLookup";
-
-    private static final RuntimePermission GET_LOOKUP_PERMISSION = new RuntimePermission(GET_LOOKUP_PERMISSION_NAME);
-
     /**
      * Creates a new call site descriptor.
      * @param lookup the lookup object describing the class the call site belongs to.
+     * When creating descriptors from a {@link java.lang.invoke} bootstrap method,
+     * it should be the lookup passed to the bootstrap.
      * @param operation the dynamic operation at the call site.
-     * @param methodType the method type of the call site.
+     * @param methodType the method type of the call site. When creating
+     * descriptors from a {@link java.lang.invoke} bootstrap method, it should be
+     * the method type passed to the bootstrap.
      */
     public CallSiteDescriptor(final Lookup lookup, final Operation operation, final MethodType methodType) {
-        this.lookup = Objects.requireNonNull(lookup, "lookup");
+        super(lookup);
         this.operation = Objects.requireNonNull(operation, "name");
         this.methodType = Objects.requireNonNull(methodType, "methodType");
     }
@@ -148,34 +147,6 @@ public class CallSiteDescriptor {
         return methodType;
     }
 
-    /**
-     * Returns the lookup that should be used to find method handles to set as
-     * targets of the call site described by this descriptor. When creating
-     * descriptors from a {@link java.lang.invoke} bootstrap method, it should
-     * be the lookup passed to the bootstrap.
-     * @return the lookup that should be used to find method handles to set as
-     * targets of the call site described by this descriptor.
-     * @throws SecurityException if the lookup isn't the
-     * {@link MethodHandles#publicLookup()} and a security manager is present,
-     * and a check for {@code RuntimePermission("dynalink.getLookup")} fails.
-     */
-    public final Lookup getLookup() {
-        final SecurityManager sm = System.getSecurityManager();
-        if (sm != null && lookup != MethodHandles.publicLookup()) {
-            sm.checkPermission(GET_LOOKUP_PERMISSION);
-        }
-        return lookup;
-    }
-
-    /**
-     * Returns the value of {@link #getLookup()} without a security check. Can
-     * be used by subclasses to access the lookup quickly.
-     * @return same as returned value of {@link #getLookup()}.
-     */
-    protected final Lookup getLookupPrivileged() {
-        return lookup;
-    }
-
     /**
      * Creates a new call site descriptor from this descriptor, which is
      * identical to this, except it changes the method type. Invokes
@@ -211,7 +182,7 @@ public class CallSiteDescriptor {
      * @return a new call site descriptor, with the method type changed.
      */
     protected CallSiteDescriptor changeMethodTypeInternal(final MethodType newMethodType) {
-        return new CallSiteDescriptor(lookup, operation, newMethodType);
+        return new CallSiteDescriptor(getLookupPrivileged(), operation, newMethodType);
     }
 
     /**
@@ -233,7 +204,7 @@ public class CallSiteDescriptor {
         final CallSiteDescriptor other = (CallSiteDescriptor)obj;
         return operation.equals(other.operation) &&
                methodType.equals(other.methodType) &&
-               lookupsEqual(lookup, other.lookup);
+               lookupsEqual(getLookupPrivileged(), other.getLookupPrivileged());
     }
 
     /**
@@ -257,7 +228,7 @@ public class CallSiteDescriptor {
      */
     @Override
     public int hashCode() {
-        return operation.hashCode() + 31 * methodType.hashCode() + 31 * 31 * lookupHashCode(lookup);
+        return operation.hashCode() + 31 * methodType.hashCode() + 31 * 31 * lookupHashCode(getLookupPrivileged());
     }
 
     /**
@@ -279,7 +250,7 @@ public class CallSiteDescriptor {
     @Override
     public String toString() {
         final String mt = methodType.toString();
-        final String l = lookup.toString();
+        final String l = getLookupPrivileged().toString();
         final String o = operation.toString();
         final StringBuilder b = new StringBuilder(o.length() + mt.length() + 1 + l.length());
         return b.append(o).append(mt).append('@').append(l).toString();

nashorn/src/jdk.dynalink/share/classes/jdk/dynalink/LinkerServicesImpl.java

@@ -85,7 +85,10 @@ package jdk.dynalink;
 
 import java.lang.invoke.MethodHandle;
 import java.lang.invoke.MethodHandles;
+import java.lang.invoke.MethodHandles.Lookup;
 import java.lang.invoke.MethodType;
+import java.util.Objects;
+import java.util.function.Supplier;
 import jdk.dynalink.linker.ConversionComparator.Comparison;
 import jdk.dynalink.linker.GuardedInvocation;
 import jdk.dynalink.linker.GuardingDynamicLinker;
@@ -97,7 +100,7 @@ import jdk.dynalink.linker.MethodHandleTransformer;
  * Default implementation of the {@link LinkerServices} interface.
  */
 final class LinkerServicesImpl implements LinkerServices {
-    private static final ThreadLocal<LinkRequest> threadLinkRequest = new ThreadLocal<>();
+    private static final ThreadLocal<SecureLookupSupplier> threadLookupSupplier = new ThreadLocal<>();
 
     private final TypeConverterFactory typeConverterFactory;
     private final GuardingDynamicLinker topLevelLinker;
@@ -138,14 +141,31 @@ final class LinkerServicesImpl implements LinkerServices {
         return typeConverterFactory.compareConversion(sourceType, targetType1, targetType2);
     }
 
+    /**
+     * Used to marshal a checked exception out of Supplier.get() in getGuardedInvocation.
+     */
+    private static class LinkerException extends RuntimeException {
+        private static final long serialVersionUID = 1L;
+
+        public LinkerException(final Exception cause) {
+            super(null, cause, true, false);
+        }
+    }
+
     @Override
     public GuardedInvocation getGuardedInvocation(final LinkRequest linkRequest) throws Exception {
-        final LinkRequest prevLinkRequest = threadLinkRequest.get();
-        threadLinkRequest.set(linkRequest);
         try {
-            return topLevelLinker.getGuardedInvocation(linkRequest, this);
-        } finally {
-            threadLinkRequest.set(prevLinkRequest);
+            return getWithLookupInternal(() -> {
+                try {
+                    return topLevelLinker.getGuardedInvocation(linkRequest, this);
+                } catch (final RuntimeException e) {
+                    throw e;
+                } catch (final Exception e) {
+                    throw new LinkerException(e);
+                }
+            }, linkRequest.getCallSiteDescriptor());
+        } catch (final LinkerException e) {
+            throw (Exception)e.getCause();
         }
     }
 
@@ -154,10 +174,32 @@ final class LinkerServicesImpl implements LinkerServices {
         return internalObjectsFilter != null ? internalObjectsFilter.transform(target) : target;
     }
 
-    static MethodHandles.Lookup getCurrentLookup() {
-        final LinkRequest currentRequest = threadLinkRequest.get();
-        if (currentRequest != null) {
-            return currentRequest.getCallSiteDescriptor().getLookup();
+    @Override
+    public <T> T getWithLookup(final Supplier<T> operation, final SecureLookupSupplier lookupSupplier) {
+        return getWithLookupInternal(
+                Objects.requireNonNull(operation, "action"),
+                Objects.requireNonNull(lookupSupplier, "lookupSupplier"));
+    }
+
+    private static <T> T getWithLookupInternal(final Supplier<T> operation, final SecureLookupSupplier lookupSupplier) {
+        final SecureLookupSupplier prevLookupSupplier = threadLookupSupplier.get();
+        final boolean differ = prevLookupSupplier != lookupSupplier;
+        if (differ) {
+            threadLookupSupplier.set(lookupSupplier);
+        }
+        try {
+            return operation.get();
+        } finally {
+            if (differ) {
+                threadLookupSupplier.set(prevLookupSupplier);
+            }
+        }
+    }
+
+    static Lookup getCurrentLookup() {
+        final SecureLookupSupplier lookupSupplier = threadLookupSupplier.get();
+        if (lookupSupplier != null) {
+            return lookupSupplier.getLookup();
         }
         return MethodHandles.publicLookup();
     }

nashorn/src/jdk.dynalink/share/classes/jdk/dynalink/SecureLookupSupplier.java

@@ -0,0 +1,79 @@
+/*
+ * 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.
+ */
+
+package jdk.dynalink;
+
+import java.lang.invoke.MethodHandles;
+import java.lang.invoke.MethodHandles.Lookup;
+import java.util.Objects;
+
+/**
+ * Provides security-checked access to a {@code MethodHandles.Lookup} object.
+ * See {@link #getLookup()} for details.
+ */
+public class SecureLookupSupplier {
+    /**
+     * The name of a runtime permission required to successfully invoke the
+     * {@link #getLookup()} method.
+     */
+    public static final String GET_LOOKUP_PERMISSION_NAME = "dynalink.getLookup";
+
+    private static final RuntimePermission GET_LOOKUP_PERMISSION = new RuntimePermission(SecureLookupSupplier.GET_LOOKUP_PERMISSION_NAME);
+
+    private final MethodHandles.Lookup lookup;
+
+    /**
+     * Creates a new secure lookup supplier, securing the passed lookup.
+     * @param lookup the lookup to secure. Can not be null.
+     * @throws NullPointerException if null is passed.
+     */
+    public SecureLookupSupplier(final MethodHandles.Lookup lookup) {
+        this.lookup = Objects.requireNonNull(lookup, "lookup");
+    }
+
+    /**
+     * Returns the lookup secured by this {@code SecureLookupSupplier}.
+     * @return the lookup secured by this {@code SecureLookupSupplier}.
+     * @throws SecurityException if the secured lookup isn't the
+     * {@link MethodHandles#publicLookup()}, and a security manager is present,
+     * and a check for {@code RuntimePermission("dynalink.getLookup")} fails.
+     */
+    public final Lookup getLookup() {
+        final SecurityManager sm = System.getSecurityManager();
+        if (sm != null && lookup != MethodHandles.publicLookup()) {
+            sm.checkPermission(GET_LOOKUP_PERMISSION);
+        }
+        return lookup;
+    }
+
+    /**
+     * Returns the value of {@link #getLookup()} without a security check. Can
+     * be used by subclasses to access the lookup quickly.
+     * @return same as returned value of {@link #getLookup()}.
+     */
+    protected final Lookup getLookupPrivileged() {
+        return lookup;
+    }
+}

nashorn/src/jdk.dynalink/share/classes/jdk/dynalink/beans/CallerSensitiveDynamicMethod.java

@@ -95,6 +95,7 @@ import java.security.AccessControlContext;
 import java.security.AccessController;
 import java.security.PrivilegedAction;
 import jdk.dynalink.CallSiteDescriptor;
+import jdk.dynalink.SecureLookupSupplier;
 import jdk.dynalink.internal.AccessControlContextFactory;
 import jdk.dynalink.linker.support.Lookup;
 
@@ -107,7 +108,7 @@ import jdk.dynalink.linker.support.Lookup;
 class CallerSensitiveDynamicMethod extends SingleDynamicMethod {
     private static final AccessControlContext GET_LOOKUP_CONTEXT =
             AccessControlContextFactory.createAccessControlContext(
-                    CallSiteDescriptor.GET_LOOKUP_PERMISSION_NAME);
+                    SecureLookupSupplier.GET_LOOKUP_PERMISSION_NAME);
 
     // Typed as "AccessibleObject" as it can be either a method or a constructor.
     // If we were Java8-only, we could use java.lang.reflect.Executable

nashorn/src/jdk.dynalink/share/classes/jdk/dynalink/beans/ClassLinker.java

@@ -84,7 +84,6 @@
 package jdk.dynalink.beans;
 
 import java.lang.invoke.MethodHandle;
-import java.lang.invoke.MethodHandles;
 import java.lang.invoke.MethodType;
 import jdk.dynalink.beans.GuardedInvocationComponent.ValidationType;
 import jdk.dynalink.linker.support.Lookup;

nashorn/src/jdk.dynalink/share/classes/jdk/dynalink/beans/LinkerServicesWithMissingMemberHandlerFactory.java

@@ -27,6 +27,8 @@ package jdk.dynalink.beans;
 
 import java.lang.invoke.MethodHandle;
 import java.lang.invoke.MethodType;
+import java.util.function.Supplier;
+import jdk.dynalink.SecureLookupSupplier;
 import jdk.dynalink.linker.ConversionComparator.Comparison;
 import jdk.dynalink.linker.GuardedInvocation;
 import jdk.dynalink.linker.LinkRequest;
@@ -77,4 +79,9 @@ final class LinkerServicesWithMissingMemberHandlerFactory implements LinkerServi
     public MethodHandle filterInternalObjects(final MethodHandle target) {
         return linkerServices.filterInternalObjects(target);
     }
+
+    @Override
+    public <T> T getWithLookup(final Supplier<T> operation, final SecureLookupSupplier lookupSupplier) {
+        return linkerServices.getWithLookup(operation, lookupSupplier);
+    }
 }

nashorn/src/jdk.dynalink/share/classes/jdk/dynalink/beans/OverloadedDynamicMethod.java

@@ -98,6 +98,7 @@ import java.util.List;
 import java.util.Map;
 import java.util.Set;
 import jdk.dynalink.CallSiteDescriptor;
+import jdk.dynalink.SecureLookupSupplier;
 import jdk.dynalink.beans.ApplicableOverloadedMethods.ApplicabilityTest;
 import jdk.dynalink.internal.AccessControlContextFactory;
 import jdk.dynalink.internal.InternalTypeUtilities;
@@ -148,7 +149,7 @@ class OverloadedDynamicMethod extends DynamicMethod {
     }
 
     @Override
-    public MethodHandle getInvocation(final CallSiteDescriptor callSiteDescriptor, final LinkerServices linkerServices) {
+    MethodHandle getInvocation(final CallSiteDescriptor callSiteDescriptor, final LinkerServices linkerServices) {
         final MethodType callSiteType = callSiteDescriptor.getMethodType();
         // First, find all methods applicable to the call site by subtyping (JLS 15.12.2.2)
         final ApplicableOverloadedMethods subtypingApplicables = getApplicables(callSiteType,
@@ -218,14 +219,14 @@ class OverloadedDynamicMethod extends DynamicMethod {
                 for(final SingleDynamicMethod method: invokables) {
                     methodHandles.add(method.getTarget(callSiteDescriptor));
                 }
-                return new OverloadedMethod(methodHandles, this, getCallSiteClassLoader(callSiteDescriptor), callSiteType, linkerServices).getInvoker();
+                return new OverloadedMethod(methodHandles, this, getCallSiteClassLoader(callSiteDescriptor), callSiteType, linkerServices, callSiteDescriptor).getInvoker();
             }
         }
     }
 
     private static final AccessControlContext GET_CALL_SITE_CLASS_LOADER_CONTEXT =
             AccessControlContextFactory.createAccessControlContext(
-                    "getClassLoader", CallSiteDescriptor.GET_LOOKUP_PERMISSION_NAME);
+                    "getClassLoader", SecureLookupSupplier.GET_LOOKUP_PERMISSION_NAME);
 
     private static ClassLoader getCallSiteClassLoader(final CallSiteDescriptor callSiteDescriptor) {
         return AccessController.doPrivileged(new PrivilegedAction<ClassLoader>() {

nashorn/src/jdk.dynalink/share/classes/jdk/dynalink/beans/OverloadedMethod.java

@@ -91,6 +91,7 @@ import java.util.Iterator;
 import java.util.List;
 import java.util.Map;
 import java.util.concurrent.ConcurrentHashMap;
+import jdk.dynalink.SecureLookupSupplier;
 import jdk.dynalink.internal.InternalTypeUtilities;
 import jdk.dynalink.linker.LinkerServices;
 import jdk.dynalink.linker.support.Lookup;
@@ -108,6 +109,7 @@ class OverloadedMethod {
     private final MethodType callSiteType;
     private final MethodHandle invoker;
     private final LinkerServices linkerServices;
+    private final SecureLookupSupplier lookupSupplier;
     private final ArrayList<MethodHandle> fixArgMethods;
     private final ArrayList<MethodHandle> varArgMethods;
 
@@ -115,12 +117,14 @@ class OverloadedMethod {
             final OverloadedDynamicMethod parent,
             final ClassLoader callSiteClassLoader,
             final MethodType callSiteType,
-            final LinkerServices linkerServices) {
+            final LinkerServices linkerServices,
+            final SecureLookupSupplier lookupSupplier) {
         this.parent = parent;
         this.callSiteClassLoader = callSiteClassLoader;
         final Class<?> commonRetType = getCommonReturnType(methodHandles);
         this.callSiteType = callSiteType.changeReturnType(commonRetType);
         this.linkerServices = linkerServices;
+        this.lookupSupplier = lookupSupplier;
 
         fixArgMethods = new ArrayList<>(methodHandles.size());
         varArgMethods = new ArrayList<>(methodHandles.size());
@@ -173,11 +177,14 @@ class OverloadedMethod {
                     break;
                 }
                 case 1: {
-                    method = SingleDynamicMethod.getInvocation(methods.get(0), callSiteType, linkerServices);
+                    final List<MethodHandle> fmethods = methods;
+                    method = linkerServices.getWithLookup(
+                            ()->SingleDynamicMethod.getInvocation(fmethods.get(0), callSiteType, linkerServices),
+                            lookupSupplier);
                     break;
                 }
                 default: {
-                    // This is unfortunate - invocation time ambiguity. We can still save the day if
+                    // This is unfortunate - invocation time ambiguity.
                     method = getAmbiguousMethodThrower(argTypes, methods);
                     break;
                 }

nashorn/src/jdk.dynalink/share/classes/jdk/dynalink/beans/SingleDynamicMethod.java

@@ -99,7 +99,6 @@ import jdk.dynalink.linker.support.Lookup;
  * arity).
  */
 abstract class SingleDynamicMethod extends DynamicMethod {
-
     private static final MethodHandle CAN_CONVERT_TO = Lookup.findOwnStatic(MethodHandles.lookup(), "canConvertTo", boolean.class, LinkerServices.class, Class.class, Object.class);
 
     SingleDynamicMethod(final String name) {
@@ -129,8 +128,8 @@ abstract class SingleDynamicMethod extends DynamicMethod {
 
     @Override
     MethodHandle getInvocation(final CallSiteDescriptor callSiteDescriptor, final LinkerServices linkerServices) {
-        return getInvocation(getTarget(callSiteDescriptor), callSiteDescriptor.getMethodType(),
-                linkerServices);
+        return linkerServices.getWithLookup(()->getInvocation(getTarget(callSiteDescriptor),
+                callSiteDescriptor.getMethodType(), linkerServices), callSiteDescriptor);
     }
 
     @Override

nashorn/src/jdk.dynalink/share/classes/jdk/dynalink/beans/messages.properties

@@ -1,25 +0,0 @@
-#  Copyright 2009-2013 Attila Szegedi
-#
-#  Licensed under either the Apache License, Version 2.0 (the "Apache 
-#  License") or the BSD License (the "BSD License"), with licensee
-#  being free to choose either of the two at their discretion.
-#
-#  You may not use this file except in compliance with either the Apache 
-#  License or the BSD License.
-#
-#  A copy of the BSD License is available in the root directory of the 
-#  source distribution of the project under the file name
-#  "Dynalink-License-BSD.txt".
-#
-#  A copy of the Apache License is available in the root directory of the
-#  source distribution of the project under the file name 
-#  "Dynalink-License-Apache-2.0.txt". Alternatively, you may obtain a 
-#  copy of the Apache License at <http://www.apache.org/licenses/LICENSE-2.0>
-#
-#  Unless required by applicable law or agreed to in writing, software
-#  distributed under the License is distributed on an "AS IS" BASIS,
-#  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-#  See your chosen License for the specific language governing permissions
-#  and limitations under that License.
-
-couldNotDiscoverAccessibleMethods=Could not discover accessible methods of class {0}, trying its superclasses and interfaces.

nashorn/src/jdk.dynalink/share/classes/jdk/dynalink/linker/GuardingTypeConverterFactory.java

@@ -85,7 +85,7 @@ package jdk.dynalink.linker;
 
 import java.lang.invoke.MethodHandles;
 import java.util.function.Supplier;
-import jdk.dynalink.CallSiteDescriptor;
+import jdk.dynalink.SecureLookupSupplier;
 import jdk.dynalink.beans.BeansLinker;
 import jdk.dynalink.linker.support.TypeUtilities;
 
@@ -132,7 +132,7 @@ public interface GuardingTypeConverterFactory {
      * (e.g. to convert some object from the dynamic language into a Java
      * interface for interoperability). Invoking the {@link Supplier#get()}
      * method on the passed supplier will be subject to the same security checks
-     * as {@link CallSiteDescriptor#getLookup()}. An implementation should avoid
+     * as {@link SecureLookupSupplier#getLookup()}. An implementation should avoid
      * retrieving the lookup if it is not needed so as to avoid the expense of
      * {@code AccessController.doPrivileged} call.
      * @return a guarded invocation that can take an object (if it passes guard)
@@ -142,6 +142,7 @@ public interface GuardingTypeConverterFactory {
      * can always handle the conversion, it can return an unconditional
      * invocation (one whose guard is null).
      * @throws Exception if there was an error during creation of the converter
+     * @see LinkerServices#getWithLookup(Supplier, SecureLookupSupplier)
      */
     public GuardedInvocation convertToType(Class<?> sourceType, Class<?> targetType, Supplier<MethodHandles.Lookup> lookupSupplier) throws Exception;
 }

nashorn/src/jdk.dynalink/share/classes/jdk/dynalink/linker/LinkerServices.java

@@ -86,8 +86,10 @@ package jdk.dynalink.linker;
 import java.lang.invoke.MethodHandle;
 import java.lang.invoke.MethodHandles;
 import java.lang.invoke.MethodType;
+import java.util.function.Supplier;
 import jdk.dynalink.DynamicLinker;
 import jdk.dynalink.DynamicLinkerFactory;
+import jdk.dynalink.SecureLookupSupplier;
 import jdk.dynalink.linker.ConversionComparator.Comparison;
 import jdk.dynalink.linker.support.TypeUtilities;
 
@@ -217,4 +219,34 @@ public interface LinkerServices {
      * filtered for wrapping and unwrapping.
      */
     public MethodHandle filterInternalObjects(final MethodHandle target);
+
+    /**
+     * Executes an operation within the context of a particular
+     * {@code MethodHandles.Lookup} lookup object. Normally, methods on
+     * {@code LinkerServices} are invoked as part of the linking mechanism in
+     * which case Dynalink internally maintains a per-thread current lookup
+     * (the one belonging to the descriptor of the call site being linked). This
+     * lookup can be retrieved by any {@link GuardingTypeConverterFactory}
+     * involved in linking if it needs to generate lookup-sensitive converters.
+     * However, linker services' methods can be invoked outside the linking
+     * process too when implementing invocation-time dispatch schemes, invoking
+     * conversions at runtime, etc. If it becomes necessary to use any type
+     * converter in this situation, and it needs a lookup, it will normally only
+     * get {@link MethodHandles#publicLookup()} as the thread is not engaged in
+     * a linking operation. If there is a way to meaningfully associate the
+     * operation to the context of some caller class, consider performing it
+     * within an invocation of this method and passing a full-strength lookup
+     * for that class, as it will associate that lookup with the current thread
+     * for the duration of the operation. Note that since you are passing a
+     * {@link SecureLookupSupplier}, any invoked type converter factories will
+     * still need to hold the necessary runtime permission to be able to get the
+     * lookup should they need it.
+     * @param <T> the type of the return value provided by the passed-in supplier.
+     * @param operation the operation to execute in context of the specified lookup.
+     * @param lookupSupplier secure supplier of the lookup
+     * @return the return value of the action
+     * @throws NullPointerException if either action or lookupSupplier are null.
+     * @see GuardingTypeConverterFactory#convertToType(Class, Class, Supplier)
+     */
+    public <T> T getWithLookup(final Supplier<T> operation, final SecureLookupSupplier lookupSupplier);
 }

nashorn/src/jdk.scripting.nashorn/share/classes/jdk/nashorn/api/scripting/ScriptUtils.java

@@ -171,7 +171,7 @@ public final class ScriptUtils {
 
         final LinkerServices linker = Bootstrap.getLinkerServices();
         final Object objToConvert = unwrap(obj);
-        final MethodHandle converter = linker.getTypeConverter(objToConvert.getClass(),  clazz);
+        final MethodHandle converter = linker.getTypeConverter(objToConvert.getClass(), clazz);
         if (converter == null) {
             // no supported conversion!
             throw new UnsupportedOperationException("conversion not supported");

nashorn/src/jdk.scripting.nashorn/share/classes/jdk/nashorn/internal/objects/Global.java

@@ -1057,6 +1057,9 @@ public final class Global extends Scope {
     private ScriptObject   builtinArrayIteratorPrototype;
     private ScriptObject   builtinStringIteratorPrototype;
 
+    private ScriptFunction builtInJavaExtend;
+    private ScriptFunction builtInJavaTo;
+
     /*
      * ECMA section 13.2.3 The [[ThrowTypeError]] Function Object
      */
@@ -2085,10 +2088,39 @@ public final class Global extends Scope {
     private synchronized ScriptObject getBuiltinJavaApi() {
         if (this.builtinJavaApi == null) {
             this.builtinJavaApi = initConstructor("Java", ScriptObject.class);
+            this.builtInJavaExtend = (ScriptFunction)builtinJavaApi.get("extend");
+            this.builtInJavaTo = (ScriptFunction)builtinJavaApi.get("to");
         }
         return this.builtinJavaApi;
     }
 
+    /**
+     * Returns true if the passed function is the built-in "Java.extend".
+     * @param fn the function in question
+     * @return true if the function is built-in "Java.extend"
+     */
+    public static boolean isBuiltInJavaExtend(final ScriptFunction fn) {
+        if(!"extend".equals(fn.getName())) {
+            // Avoid hitting the thread local if the name doesn't match.
+            return false;
+        }
+        return fn == Context.getGlobal().builtInJavaExtend;
+    }
+
+    /**
+     * Returns true if the passed function is the built-in "Java.to".
+     * @param fn the function in question
+     * @return true if the function is built-in "Java.to"
+     */
+    public static boolean isBuiltInJavaTo(final ScriptFunction fn) {
+        if(!"to".equals(fn.getName())) {
+            // Avoid hitting the thread local if the name doesn't match.
+            return false;
+        }
+        return fn == Context.getGlobal().builtInJavaTo;
+    }
+
+
     private synchronized ScriptFunction getBuiltinRangeError() {
         if (this.builtinRangeError == null) {
             this.builtinRangeError = initErrorSubtype("RangeError", getErrorPrototype());

nashorn/src/jdk.scripting.nashorn/share/classes/jdk/nashorn/internal/objects/NativeJava.java

@@ -37,6 +37,7 @@ import java.util.Deque;
 import java.util.List;
 import java.util.Map;
 import java.util.Queue;
+import jdk.dynalink.SecureLookupSupplier;
 import jdk.dynalink.beans.BeansLinker;
 import jdk.dynalink.beans.StaticClass;
 import jdk.dynalink.linker.support.TypeUtilities;
@@ -64,7 +65,6 @@ import jdk.nashorn.internal.runtime.linker.JavaAdapterFactory;
  */
 @ScriptClass("Java")
 public final class NativeJava {
-
     // initialized by nasgen
     @SuppressWarnings("unused")
     private static PropertyMap $nasgenmap$;
@@ -391,6 +391,9 @@ public final class NativeJava {
 
         if(targetClass.isArray()) {
             try {
+                if (self instanceof SecureLookupSupplier) {
+                    return JSType.toJavaArrayWithLookup(obj, targetClass.getComponentType(), (SecureLookupSupplier)self);
+                }
                 return JSType.toJavaArray(obj, targetClass.getComponentType());
             } catch (final Exception exp) {
                 throw typeError(exp, "java.array.conversion.failed", targetClass.getName());
@@ -468,7 +471,7 @@ public final class NativeJava {
                 // Usually writable properties are a subset as 'write-only' properties are rare
                 props.addAll(BeansLinker.getReadableStaticPropertyNames(clazz));
                 props.addAll(BeansLinker.getStaticMethodNames(clazz));
-            } catch (Exception ignored) {}
+            } catch (final Exception ignored) {}
             return props;
         } else if (object instanceof JSObject) {
             final JSObject jsObj = ((JSObject)object);
@@ -484,7 +487,7 @@ public final class NativeJava {
                 // Usually writable properties are a subset as 'write-only' properties are rare
                 props.addAll(BeansLinker.getReadableInstancePropertyNames(clazz));
                 props.addAll(BeansLinker.getInstanceMethodNames(clazz));
-            } catch (Exception ignored) {}
+            } catch (final Exception ignored) {}
             return props;
         }
 

nashorn/src/jdk.scripting.nashorn/share/classes/jdk/nashorn/internal/runtime/JSType.java

@@ -35,6 +35,7 @@ import java.lang.reflect.Array;
 import java.util.Arrays;
 import java.util.Collections;
 import java.util.List;
+import jdk.dynalink.SecureLookupSupplier;
 import jdk.dynalink.beans.StaticClass;
 import jdk.nashorn.api.scripting.JSObject;
 import jdk.nashorn.internal.codegen.CompilerConstants.Call;
@@ -175,6 +176,9 @@ public enum JSType {
     /** Method handle to convert a JS Object to a Java array. */
     public static final Call TO_JAVA_ARRAY = staticCall(JSTYPE_LOOKUP, JSType.class, "toJavaArray", Object.class, Object.class, Class.class);
 
+    /** Method handle to convert a JS Object to a Java array. */
+    public static final Call TO_JAVA_ARRAY_WITH_LOOKUP = staticCall(JSTYPE_LOOKUP, JSType.class, "toJavaArrayWithLookup", Object.class, Object.class, Class.class, SecureLookupSupplier.class);
+
     /** Method handle for void returns. */
     public static final Call VOID_RETURN = staticCall(JSTYPE_LOOKUP, JSType.class, "voidReturn", void.class);
 
@@ -798,7 +802,7 @@ public enum JSType {
      * @return the value converted to Integer or Double
      */
     public static Number toNarrowestNumber(final long l) {
-        return isRepresentableAsInt(l) ? Integer.valueOf((int) l) : Double.valueOf((double) l);
+        return isRepresentableAsInt(l) ? Integer.valueOf((int) l) : Double.valueOf(l);
     }
 
     /**
@@ -1108,7 +1112,7 @@ public enum JSType {
      * @return the uint32 value as double
      */
     public static double toUint32Double(final int num) {
-        return (double) toUint32(num);
+        return toUint32(num);
     }
 
     /**
@@ -1318,6 +1322,20 @@ public enum JSType {
         }
     }
 
+    /**
+     * Script object to Java array conversion.
+     *
+     * @param obj script object to be converted to Java array
+     * @param componentType component type of the destination array required
+     * @param lookupSupplier supplier for the lookup of the class invoking the
+     * conversion. Can be used to use protection-domain specific converters
+     * if the target type is a SAM.
+     * @return converted Java array
+     */
+    public static Object toJavaArrayWithLookup(final Object obj, final Class<?> componentType, final SecureLookupSupplier lookupSupplier) {
+        return Bootstrap.getLinkerServices().getWithLookup(()->toJavaArray(obj, componentType), lookupSupplier);
+    }
+
     /**
      * Java array to java array conversion - but using type conversions implemented by linker.
      *
@@ -1744,9 +1762,9 @@ public enum JSType {
     public static MethodHandle unboxConstant(final Object o) {
         if (o != null) {
             if (o.getClass() == Integer.class) {
-                return MH.constant(int.class, ((Integer)o));
+                return MH.constant(int.class, o);
             } else if (o.getClass() == Double.class) {
-                return MH.constant(double.class, ((Double)o));
+                return MH.constant(double.class, o);
             }
         }
         return MH.constant(Object.class, o);

nashorn/src/jdk.scripting.nashorn/share/classes/jdk/nashorn/internal/runtime/ScriptFunction.java

@@ -29,6 +29,7 @@ import static jdk.nashorn.internal.lookup.Lookup.MH;
 import static jdk.nashorn.internal.runtime.ECMAErrors.typeError;
 import static jdk.nashorn.internal.runtime.ScriptRuntime.UNDEFINED;
 import static jdk.nashorn.internal.runtime.UnwarrantedOptimismException.INVALID_PROGRAM_POINT;
+
 import java.lang.invoke.MethodHandle;
 import java.lang.invoke.MethodHandles;
 import java.lang.invoke.MethodHandles.Lookup;
@@ -45,6 +46,7 @@ import java.util.HashSet;
 import java.util.List;
 import java.util.concurrent.atomic.LongAdder;
 import jdk.dynalink.CallSiteDescriptor;
+import jdk.dynalink.SecureLookupSupplier;
 import jdk.dynalink.linker.GuardedInvocation;
 import jdk.dynalink.linker.LinkRequest;
 import jdk.dynalink.linker.support.Guards;
@@ -129,7 +131,7 @@ public class ScriptFunction extends ScriptObject {
     private static final Object LAZY_PROTOTYPE = new Object();
 
     private static final AccessControlContext GET_LOOKUP_PERMISSION_CONTEXT =
-            AccessControlContextFactory.createAccessControlContext(CallSiteDescriptor.GET_LOOKUP_PERMISSION_NAME);
+            AccessControlContextFactory.createAccessControlContext(SecureLookupSupplier.GET_LOOKUP_PERMISSION_NAME);
 
     private static PropertyMap createStrictModeMap(final PropertyMap map) {
         final int flags = Property.NOT_ENUMERABLE | Property.NOT_CONFIGURABLE;
@@ -955,10 +957,14 @@ public class ScriptFunction extends ScriptObject {
                 // It's already (callee, this, args...), just what we need
                 boundHandle = callHandle;
             }
-        } else if (data.isBuiltin() && "extend".equals(data.getName())) {
-            // NOTE: the only built-in named "extend" is NativeJava.extend. As a special-case we're binding the
-            // current lookup as its "this" so it can do security-sensitive creation of adapter classes.
+        } else if (data.isBuiltin() && Global.isBuiltInJavaExtend(this)) {
+            // We're binding the current lookup as "self" so the function can do
+            // security-sensitive creation of adapter classes.
             boundHandle = MH.dropArguments(MH.bindTo(callHandle, getLookupPrivileged(desc)), 0, type.parameterType(0), type.parameterType(1));
+        } else if (data.isBuiltin() && Global.isBuiltInJavaTo(this)) {
+            // We're binding the current call site descriptor as "self" so the function can do
+            // security-sensitive creation of adapter classes.
+            boundHandle = MH.dropArguments(MH.bindTo(callHandle, desc), 0, type.parameterType(0), type.parameterType(1));
         } else if (scopeCall && needsWrappedThis()) {
             // Make a handle that drops the passed "this" argument and substitutes either Global or Undefined
             // (this, args...) => ([this], args...)

nashorn/src/jdk.scripting.nashorn/share/classes/jdk/nashorn/internal/runtime/linker/NashornBeansLinker.java

@@ -32,8 +32,10 @@ import java.lang.invoke.MethodHandles;
 import java.lang.invoke.MethodType;
 import java.lang.reflect.Method;
 import java.lang.reflect.Modifier;
+import java.util.function.Supplier;
 import jdk.dynalink.CallSiteDescriptor;
 import jdk.dynalink.NamedOperation;
+import jdk.dynalink.SecureLookupSupplier;
 import jdk.dynalink.StandardOperation;
 import jdk.dynalink.beans.BeansLinker;
 import jdk.dynalink.linker.ConversionComparator.Comparison;
@@ -153,7 +155,7 @@ public class NashornBeansLinker implements GuardingDynamicLinker {
         if (arg instanceof ConsString) {
             return arg.toString();
         } else if (mirrorAlways && arg instanceof ScriptObject) {
-            return ScriptUtils.wrap((ScriptObject)arg);
+            return ScriptUtils.wrap(arg);
         } else {
             return arg;
         }
@@ -250,5 +252,10 @@ public class NashornBeansLinker implements GuardingDynamicLinker {
         public MethodHandle filterInternalObjects(final MethodHandle target) {
             return linkerServices.filterInternalObjects(target);
         }
+
+        @Override
+        public <T> T getWithLookup(final Supplier<T> operation, final SecureLookupSupplier lookupSupplier) {
+            return linkerServices.getWithLookup(operation, lookupSupplier);
+        }
     }
 }

nashorn/src/jdk.scripting.nashorn/share/classes/jdk/nashorn/internal/runtime/linker/NashornCallSiteDescriptor.java

@@ -43,6 +43,7 @@ import jdk.dynalink.CallSiteDescriptor;
 import jdk.dynalink.CompositeOperation;
 import jdk.dynalink.NamedOperation;
 import jdk.dynalink.Operation;
+import jdk.dynalink.SecureLookupSupplier;
 import jdk.dynalink.StandardOperation;
 import jdk.nashorn.internal.ir.debug.NashornTextifier;
 import jdk.nashorn.internal.runtime.AccessControlContextFactory;
@@ -161,7 +162,7 @@ public final class NashornCallSiteDescriptor extends CallSiteDescriptor {
     };
 
     private static final AccessControlContext GET_LOOKUP_PERMISSION_CONTEXT =
-            AccessControlContextFactory.createAccessControlContext(CallSiteDescriptor.GET_LOOKUP_PERMISSION_NAME);
+            AccessControlContextFactory.createAccessControlContext(SecureLookupSupplier.GET_LOOKUP_PERMISSION_NAME);
 
     @SuppressWarnings("unchecked")
     private static final Map<String, Reference<NamedOperation>>[] NAMED_OPERATIONS =

nashorn/src/jdk.scripting.nashorn/share/classes/jdk/nashorn/internal/runtime/linker/NashornLinker.java

@@ -42,6 +42,7 @@ import java.util.Queue;
 import java.util.function.Supplier;
 import javax.script.Bindings;
 import jdk.dynalink.CallSiteDescriptor;
+import jdk.dynalink.SecureLookupSupplier;
 import jdk.dynalink.linker.ConversionComparator;
 import jdk.dynalink.linker.GuardedInvocation;
 import jdk.dynalink.linker.GuardingTypeConverterFactory;
@@ -53,6 +54,7 @@ import jdk.dynalink.linker.support.Lookup;
 import jdk.nashorn.api.scripting.JSObject;
 import jdk.nashorn.api.scripting.ScriptObjectMirror;
 import jdk.nashorn.api.scripting.ScriptUtils;
+import jdk.nashorn.internal.codegen.CompilerConstants.Call;
 import jdk.nashorn.internal.objects.NativeArray;
 import jdk.nashorn.internal.runtime.AccessControlContextFactory;
 import jdk.nashorn.internal.runtime.JSType;
@@ -67,7 +69,7 @@ import jdk.nashorn.internal.runtime.Undefined;
  */
 final class NashornLinker implements TypeBasedGuardingDynamicLinker, GuardingTypeConverterFactory, ConversionComparator {
     private static final AccessControlContext GET_LOOKUP_PERMISSION_CONTEXT =
-            AccessControlContextFactory.createAccessControlContext(CallSiteDescriptor.GET_LOOKUP_PERMISSION_NAME);
+            AccessControlContextFactory.createAccessControlContext(SecureLookupSupplier.GET_LOOKUP_PERMISSION_NAME);
 
     private static final ClassValue<MethodHandle> ARRAY_CONVERTERS = new ClassValue<MethodHandle>() {
         @Override
@@ -111,7 +113,7 @@ final class NashornLinker implements TypeBasedGuardingDynamicLinker, GuardingTyp
 
     @Override
     public GuardedInvocation convertToType(final Class<?> sourceType, final Class<?> targetType, final Supplier<MethodHandles.Lookup> lookupSupplier) throws Exception {
-        GuardedInvocation gi = convertToTypeNoCast(sourceType, targetType);
+        GuardedInvocation gi = convertToTypeNoCast(sourceType, targetType, lookupSupplier);
         if(gi == null) {
             gi = getSamTypeConverter(sourceType, targetType, lookupSupplier);
         }
@@ -128,13 +130,13 @@ final class NashornLinker implements TypeBasedGuardingDynamicLinker, GuardingTyp
      * @return a guarded invocation that converts from the source type to the target type.
      * @throws Exception if something goes wrong
      */
-    private static GuardedInvocation convertToTypeNoCast(final Class<?> sourceType, final Class<?> targetType) throws Exception {
+    private static GuardedInvocation convertToTypeNoCast(final Class<?> sourceType, final Class<?> targetType, final Supplier<MethodHandles.Lookup> lookupSupplier) throws Exception {
         final MethodHandle mh = JavaArgumentConverters.getConverter(targetType);
         if (mh != null) {
             return new GuardedInvocation(mh, canLinkTypeStatic(sourceType) ? null : IS_NASHORN_OR_UNDEFINED_TYPE);
         }
 
-        final GuardedInvocation arrayConverter = getArrayConverter(sourceType, targetType);
+        final GuardedInvocation arrayConverter = getArrayConverter(sourceType, targetType, lookupSupplier);
         if(arrayConverter != null) {
             return arrayConverter;
         }
@@ -183,7 +185,7 @@ final class NashornLinker implements TypeBasedGuardingDynamicLinker, GuardingTyp
      * either the source type is neither NativeArray, nor a superclass of it, or if the target type is not an array
      * type, List, Queue, Deque, or Collection.
      */
-    private static GuardedInvocation getArrayConverter(final Class<?> sourceType, final Class<?> targetType) {
+    private static GuardedInvocation getArrayConverter(final Class<?> sourceType, final Class<?> targetType, final Supplier<MethodHandles.Lookup> lookupSupplier) {
         final boolean isSourceTypeNativeArray = sourceType == NativeArray.class;
         // If source type is more generic than NativeArray class, we'll need to use a guard
         final boolean isSourceTypeGeneric = !isSourceTypeNativeArray && sourceType.isAssignableFrom(NativeArray.class);
@@ -191,7 +193,25 @@ final class NashornLinker implements TypeBasedGuardingDynamicLinker, GuardingTyp
         if (isSourceTypeNativeArray || isSourceTypeGeneric) {
             final MethodHandle guard = isSourceTypeGeneric ? IS_NATIVE_ARRAY : null;
             if(targetType.isArray()) {
-                return new GuardedInvocation(ARRAY_CONVERTERS.get(targetType), guard);
+                final MethodHandle mh = ARRAY_CONVERTERS.get(targetType);
+                final MethodHandle mhWithLookup;
+                if (mh.type().parameterCount() == 2) {
+                    assert mh.type().parameterType(1) == SecureLookupSupplier.class;
+                    // We enter this branch when the array's ultimate component
+                    // type is a SAM type; we use a handle to JSType.toJavaArrayWithLookup
+                    // for these in the converter MH and must bind it here with
+                    // a secure supplier for the current lookup. By retrieving
+                    // the lookup, we'll also (correctly) inform the type
+                    // converter that this array converter is lookup specific.
+                    // We then need to wrap the returned lookup into a
+                    // new SecureLookupSupplier in order to bind it to the
+                    // JSType.toJavaArrayWithLookup() parameter.
+                    mhWithLookup = MH.insertArguments(mh, 1,
+                            new SecureLookupSupplier(getCurrentLookup(lookupSupplier)));
+                } else {
+                    mhWithLookup = mh;
+                }
+                return new GuardedInvocation(mhWithLookup, guard);
             } else if(targetType == List.class) {
                 return new GuardedInvocation(TO_LIST, guard);
             } else if(targetType == Deque.class) {
@@ -207,8 +227,24 @@ final class NashornLinker implements TypeBasedGuardingDynamicLinker, GuardingTyp
 
     private static MethodHandle createArrayConverter(final Class<?> type) {
         assert type.isArray();
-        final MethodHandle converter = MH.insertArguments(JSType.TO_JAVA_ARRAY.methodHandle(), 1, type.getComponentType());
-        return MH.asType(converter, converter.type().changeReturnType(type));
+
+        final Class<?> componentType = type.getComponentType();
+        final Call converterCall;
+        // Is the ultimate component type of this array a SAM type?
+        if (isComponentTypeAutoConvertibleFromFunction(componentType)) {
+            converterCall = JSType.TO_JAVA_ARRAY_WITH_LOOKUP;
+        } else {
+            converterCall = JSType.TO_JAVA_ARRAY;
+        }
+        final MethodHandle typeBoundConverter = MH.insertArguments(converterCall.methodHandle(), 1, componentType);
+        return MH.asType(typeBoundConverter, typeBoundConverter.type().changeReturnType(type));
+    }
+
+    private static boolean isComponentTypeAutoConvertibleFromFunction(final Class<?> targetType) {
+        if (targetType.isArray()) {
+            return isComponentTypeAutoConvertibleFromFunction(targetType.getComponentType());
+        }
+        return isAutoConvertibleFromFunction(targetType);
     }
 
     private static GuardedInvocation getMirrorConverter(final Class<?> sourceType, final Class<?> targetType) {

nashorn/test/script/basic/JDK-8150218.js

@@ -0,0 +1,63 @@
+/*
+ * 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.
+ * 
+ * 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.
+ */
+
+/**
+ * JDK-8150218: Autoconversion SAM adapters sometimes don't get privileges
+ *
+ * @test
+ * @run
+ */
+
+function f() {
+    java.lang.System.getProperty("user.dir")
+}
+
+java.security.AccessController.doPrivileged(new java.security.PrivilegedAction(function () {
+    // Control: this used to work even before this improvement
+    new java.lang.Runnable(f).run()
+
+    // SAM type explicitly created through an array needs to get the right permissions too
+    Java.to([f], Java.type("java.lang.Runnable[]"))[0].run()
+
+    // Even when more deeply nested
+    Java.to([[[f]]], Java.type("java.lang.Runnable[][][]"))[0][0][0].run()
+
+    var rt = new (Java.type("jdk.dynalink.test.ArrayRunnableTest"))
+    var n = "runnables"
+
+    // Explicit array passed to vararg setter chosen at run time
+    rt[n] = [f]
+    rt.firstRunnable.run()
+
+    // Automatically packed one-element array passed to vararg setter chosen at run time
+    rt[n] = f
+    rt.firstRunnable.run()
+
+    // Explicit array passed to vararg method overload chosen at run time
+    rt.setRunnablesOverloaded([f])
+    rt.firstRunnable.run()
+
+    // Automatically packed one-element array passed to vararg method overload chosen at run time
+    rt.setRunnablesOverloaded(f)
+    rt.firstRunnable.run()
+}))

nashorn/test/src/jdk/dynalink/test/ArrayRunnableTest.java

@@ -0,0 +1,45 @@
+/*
+ * 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.
+ */
+
+package jdk.dynalink.test;
+
+public class ArrayRunnableTest {
+    private Runnable[] r;
+    public void setRunnables(final Runnable... r) {
+        this.r = r;
+    }
+
+    public Runnable getFirstRunnable() {
+        return r[0];
+    }
+
+    public void setRunnablesOverloaded(final Runnable... r) {
+        this.r = r;
+    }
+
+    public void setRunnablesOverloaded(final Object... r) {
+        throw new UnsupportedOperationException();
+    }
+}