Merge

nashorn/make/project.properties

@@ -223,9 +223,9 @@ run.test.user.language=tr
 run.test.user.country=TR
 
 #  -XX:+PrintCompilation -XX:+UnlockDiagnosticVMOptions -XX:+PrintNMethods
-run.test.jvmargs.main=-server -Xmx${run.test.xmx} -XX:+TieredCompilation -ea -Dfile.encoding=UTF-8 -Duser.language=${run.test.user.language} -Duser.country=${run.test.user.country}
+run.test.jvmargs.main=-server -Xmx${run.test.xmx} -XX:+TieredCompilation -ea -Dfile.encoding=UTF-8 -Duser.language=${run.test.user.language} -Duser.country=${run.test.user.country} -XX:+HeapDumpOnOutOfMemoryError
 
-#-XX:+HeapDumpOnOutOfMemoryError -XX:-UseCompressedKlassPointers -XX:+PrintHeapAtGC -XX:ClassMetaspaceSize=300M  
+#-XX:-UseCompressedKlassPointers -XX:+PrintHeapAtGC -XX:ClassMetaspaceSize=300M  
 run.test.jvmargs.octane.main=-Xms${run.test.xms} ${run.test.jvmargs.main}
 
 run.test.jvmsecurityargs=-Xverify:all -Djava.security.properties=${basedir}/make/java.security.override -Djava.security.manager -Djava.security.policy=${basedir}/build/nashorn.policy

nashorn/src/jdk/internal/dynalink/ChainedCallSite.java

@@ -85,12 +85,12 @@ package jdk.internal.dynalink;
 
 import java.lang.invoke.MethodHandle;
 import java.lang.invoke.MethodHandles;
-import java.lang.invoke.MethodType;
 import java.util.Iterator;
 import java.util.LinkedList;
 import java.util.concurrent.atomic.AtomicReference;
 import jdk.internal.dynalink.linker.GuardedInvocation;
 import jdk.internal.dynalink.support.AbstractRelinkableCallSite;
+import jdk.internal.dynalink.support.Lookup;
 
 /**
  * A relinkable call site that maintains a chain of linked method handles. In the default implementation, up to 8 method
@@ -103,6 +103,9 @@ import jdk.internal.dynalink.support.AbstractRelinkableCallSite;
  * handle is always at the start of the chain.
  */
 public class ChainedCallSite extends AbstractRelinkableCallSite {
+    private static final MethodHandle PRUNE = Lookup.findOwnSpecial(MethodHandles.lookup(), "prune", MethodHandle.class,
+            MethodHandle.class);
+
     private final AtomicReference<LinkedList<GuardedInvocation>> invocations = new AtomicReference<>();
 
     /**
@@ -194,18 +197,4 @@ public class ChainedCallSite extends AbstractRelinkableCallSite {
     private MethodHandle prune(MethodHandle relink) {
         return relinkInternal(null, relink, false);
     }
-
-    private static final MethodHandle PRUNE;
-    static {
-        try {
-            PRUNE = MethodHandles.lookup().findSpecial(ChainedCallSite.class, "prune", MethodType.methodType(
-                    MethodHandle.class, MethodHandle.class), ChainedCallSite.class);
-        // NOTE: using two catch blocks so we don't introduce a reference to 1.7 ReflectiveOperationException, allowing
-        // Dynalink to be used on 1.6 JVMs with Remi's backport library.
-        } catch(IllegalAccessException e) {
-            throw new AssertionError(e.getMessage(), e); // Can not happen
-        } catch(NoSuchMethodException e) {
-            throw new AssertionError(e.getMessage(), e); // Can not happen
-        }
-    }
 }

nashorn/src/jdk/internal/dynalink/DynamicLinkerFactory.java

@@ -84,6 +84,8 @@
 package jdk.internal.dynalink;
 
 import java.lang.invoke.MutableCallSite;
+import java.security.AccessController;
+import java.security.PrivilegedAction;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collections;
@@ -117,7 +119,9 @@ public class DynamicLinkerFactory {
      */
     public static final int DEFAULT_UNSTABLE_RELINK_THRESHOLD = 8;
 
-    private ClassLoader classLoader = Thread.currentThread().getContextClassLoader();
+    private boolean classLoaderExplicitlySet = false;
+    private ClassLoader classLoader;
+
     private List<? extends GuardingDynamicLinker> prioritizedLinkers;
     private List<? extends GuardingDynamicLinker> fallbackLinkers;
     private int runtimeContextArgCount = 0;
@@ -126,12 +130,13 @@ public class DynamicLinkerFactory {
 
     /**
      * Sets the class loader for automatic discovery of available linkers. If not set explicitly, then the thread
-     * context class loader at the time of the constructor invocation will be used.
+     * context class loader at the time of {@link #createLinker()} invocation will be used.
      *
      * @param classLoader the class loader used for the autodiscovery of available linkers.
      */
     public void setClassLoader(ClassLoader classLoader) {
         this.classLoader = classLoader;
+        classLoaderExplicitlySet = true;
     }
 
     /**
@@ -260,7 +265,8 @@ public class DynamicLinkerFactory {
         addClasses(knownLinkerClasses, prioritizedLinkers);
         addClasses(knownLinkerClasses, fallbackLinkers);
 
-        final List<GuardingDynamicLinker> discovered = AutoDiscovery.loadLinkers(classLoader);
+        final ClassLoader effectiveClassLoader = classLoaderExplicitlySet ? classLoader : getThreadContextClassLoader();
+        final List<GuardingDynamicLinker> discovered = AutoDiscovery.loadLinkers(effectiveClassLoader);
         // Now, concatenate ...
         final List<GuardingDynamicLinker> linkers =
                 new ArrayList<>(prioritizedLinkers.size() + discovered.size()
@@ -303,6 +309,15 @@ public class DynamicLinkerFactory {
                 runtimeContextArgCount, syncOnRelink, unstableRelinkThreshold);
     }
 
+    private static ClassLoader getThreadContextClassLoader() {
+        return AccessController.doPrivileged(new PrivilegedAction<ClassLoader>() {
+            @Override
+            public ClassLoader run() {
+                return Thread.currentThread().getContextClassLoader();
+            }
+        });
+    }
+
     private static void addClasses(Set<Class<? extends GuardingDynamicLinker>> knownLinkerClasses,
             List<? extends GuardingDynamicLinker> linkers) {
         for(GuardingDynamicLinker linker: linkers) {

nashorn/src/jdk/internal/dynalink/beans/ClassString.java

@@ -112,10 +112,6 @@ final class ClassString {
         this(type.parameterArray());
     }
 
-    Class<?>[] getClasses() {
-        return classes;
-    }
-
     @Override
     public boolean equals(Object other) {
         if(!(other instanceof ClassString)) {

nashorn/src/jdk/internal/dynalink/beans/StaticClassLinker.java

@@ -189,15 +189,17 @@ class StaticClassLinker implements TypeBasedGuardingDynamicLinker {
         return type == StaticClass.class;
     }
 
-    /*private*/ static final MethodHandle GET_CLASS = new Lookup(MethodHandles.lookup()).findVirtual(StaticClass.class,
+    /*private*/ static final MethodHandle GET_CLASS;
-            "getRepresentedClass", MethodType.methodType(Class.class));
+    /*private*/ static final MethodHandle IS_CLASS;
-
-    /*private*/ static final MethodHandle IS_CLASS = new Lookup(MethodHandles.lookup()).findStatic(StaticClassLinker.class,
-            "isClass", MethodType.methodType(Boolean.TYPE, Class.class, Object.class));
-
     /*private*/ static final MethodHandle ARRAY_CTOR = Lookup.PUBLIC.findStatic(Array.class, "newInstance",
             MethodType.methodType(Object.class, Class.class, int.class));
 
+    static {
+        final Lookup lookup = new Lookup(MethodHandles.lookup());
+        GET_CLASS = lookup.findVirtual(StaticClass.class, "getRepresentedClass", MethodType.methodType(Class.class));
+        IS_CLASS = lookup.findOwnStatic("isClass", Boolean.TYPE, Class.class, Object.class);
+    }
+
     @SuppressWarnings("unused")
     private static boolean isClass(Class<?> clazz, Object obj) {
         return obj instanceof StaticClass && ((StaticClass)obj).getRepresentedClass() == clazz;

nashorn/src/jdk/internal/dynalink/support/Backport.java

@@ -1,99 +0,0 @@
-/*
- * Copyright (c) 2010, 2013, 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.
- */
-
-/*
- * This file is available under and governed by the GNU General Public
- * License version 2 only, as published by the Free Software Foundation.
- * However, the following notice accompanied the original version of this
- * file, and Oracle licenses the original version of this file under the BSD
- * license:
- */
-/*
-   Copyright 2009-2013 Attila Szegedi
-
-   Licensed under both the Apache License, Version 2.0 (the "Apache License")
-   and 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.
-
-   If you choose to use this file in compliance with the Apache License, the
-   following notice applies to you:
-
-       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 the License for the specific language governing
-       permissions and limitations under the License.
-
-   If you choose to use this file in compliance with the BSD License, the
-   following notice applies to you:
-
-       Redistribution and use in source and binary forms, with or without
-       modification, are permitted provided that the following conditions are
-       met:
-       * Redistributions of source code must retain the above copyright
-         notice, this list of conditions and the following disclaimer.
-       * Redistributions in binary form must reproduce the above copyright
-         notice, this list of conditions and the following disclaimer in the
-         documentation and/or other materials provided with the distribution.
-       * Neither the name of the copyright holder nor the names of
-         contributors may be used to endorse or promote products derived from
-         this software without specific prior written permission.
-
-       THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
-       IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
-       TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
-       PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDER
-       BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
-       CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
-       SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
-       BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
-       WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
-       OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
-       ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-*/
-
-package jdk.internal.dynalink.support;
-
-import java.lang.invoke.MethodHandles;
-
-/**
- * @author Attila Szegedi
- */
-public class Backport {
-    /**
-     * True if Remi's JSR-292 backport agent is active; false if we're using native OpenJDK JSR-292 support.
-     */
-    public static final boolean inUse = MethodHandles.class.getName().startsWith("jsr292");
-
-    private Backport() {
-    }
-}

nashorn/src/jdk/internal/dynalink/support/ClassMap.java

@@ -85,6 +85,8 @@ package jdk.internal.dynalink.support;
 
 import java.lang.ref.Reference;
 import java.lang.ref.SoftReference;
+import java.security.AccessController;
+import java.security.PrivilegedAction;
 import java.util.Map;
 import java.util.WeakHashMap;
 import java.util.concurrent.ConcurrentHashMap;
@@ -121,22 +123,13 @@ public abstract class ClassMap<T> {
      */
     protected abstract T computeValue(Class<?> clazz);
 
-    /**
-     * Returns the class loader that governs the strong referenceability of this class map.
-     *
-     * @return the class loader that governs the strong referenceability of this class map.
-     */
-    public ClassLoader getClassLoader() {
-        return classLoader;
-    }
-
     /**
      * Returns the value associated with the class
      *
      * @param clazz the class
      * @return the value associated with the class
      */
-    public T get(Class<?> clazz) {
+    public T get(final Class<?> clazz) {
         // Check in fastest first - objects we're allowed to strongly reference
         final T v = map.get(clazz);
         if(v != null) {
@@ -156,8 +149,16 @@ public abstract class ClassMap<T> {
         // Not found in either place; create a new value
         final T newV = computeValue(clazz);
         assert newV != null;
+
+        final ClassLoader clazzLoader = AccessController.doPrivileged(new PrivilegedAction<ClassLoader>() {
+            @Override
+            public ClassLoader run() {
+                return clazz.getClassLoader();
+            }
+        });
+
         // If allowed to strongly reference, put it in the fast map
-        if(Guards.canReferenceDirectly(classLoader, clazz.getClassLoader())) {
+        if(Guards.canReferenceDirectly(classLoader, clazzLoader)) {
             final T oldV = map.putIfAbsent(clazz, newV);
             return oldV != null ? oldV : newV;
         }

nashorn/src/jdk/internal/dynalink/support/Guards.java

@@ -258,23 +258,24 @@ public class Guards {
                 type.changeReturnType(Boolean.TYPE), new int[] { pos });
     }
 
-    private static final MethodHandle IS_OF_CLASS = new Lookup(MethodHandles.lookup()).findStatic(Guards.class,
-            "isOfClass", MethodType.methodType(Boolean.TYPE, Class.class, Object.class));
-
     private static final MethodHandle IS_INSTANCE = Lookup.PUBLIC.findVirtual(Class.class, "isInstance",
             MethodType.methodType(Boolean.TYPE, Object.class));
 
-    private static final MethodHandle IS_ARRAY = new Lookup(MethodHandles.lookup()).findStatic(Guards.class, "isArray",
+    private static final MethodHandle IS_OF_CLASS;
-            MethodType.methodType(Boolean.TYPE, Object.class));
+    private static final MethodHandle IS_ARRAY;
+    private static final MethodHandle IS_IDENTICAL;
+    private static final MethodHandle IS_NULL;
+    private static final MethodHandle IS_NOT_NULL;
 
-    private static final MethodHandle IS_IDENTICAL = new Lookup(MethodHandles.lookup()).findStatic(Guards.class,
+    static {
-            "isIdentical", MethodType.methodType(Boolean.TYPE, Object.class, Object.class));
+        final Lookup lookup = new Lookup(MethodHandles.lookup());
 
-    private static final MethodHandle IS_NULL = new Lookup(MethodHandles.lookup()).findStatic(Guards.class,
+        IS_OF_CLASS  = lookup.findOwnStatic("isOfClass",   Boolean.TYPE, Class.class, Object.class);
-            "isNull", MethodType.methodType(Boolean.TYPE, Object.class));
+        IS_ARRAY     = lookup.findOwnStatic("isArray",     Boolean.TYPE, Object.class);
-
+        IS_IDENTICAL = lookup.findOwnStatic("isIdentical", Boolean.TYPE, Object.class, Object.class);
-    private static final MethodHandle IS_NOT_NULL = new Lookup(MethodHandles.lookup()).findStatic(Guards.class,
+        IS_NULL      = lookup.findOwnStatic("isNull",      Boolean.TYPE, Object.class);
-            "isNotNull", MethodType.methodType(Boolean.TYPE, Object.class));
+        IS_NOT_NULL  = lookup.findOwnStatic("isNotNull",   Boolean.TYPE, Object.class);
+    }
 
     /**
      * Creates a guard method that tests its only argument for being of an exact particular class.

nashorn/src/jdk/internal/dynalink/support/Lookup.java

@@ -89,7 +89,6 @@ import java.lang.invoke.MethodType;
 import java.lang.reflect.Constructor;
 import java.lang.reflect.Field;
 import java.lang.reflect.Method;
-import java.lang.reflect.Modifier;
 
 /**
  * A wrapper around MethodHandles.Lookup that masks checked exceptions in those cases when you're looking up methods
@@ -235,9 +234,8 @@ public class Lookup {
     }
 
     /**
-     * Performs a findSpecial on the underlying lookup, except for the backport where it rather uses unreflect. Converts
+     * Performs a findSpecial on the underlying lookup. Converts any encountered {@link IllegalAccessException} into an
-     * any encountered {@link IllegalAccessException} into an {@link IllegalAccessError} and a
+     * {@link IllegalAccessError} and a {@link NoSuchMethodException} into a {@link NoSuchMethodError}.
-     * {@link NoSuchMethodException} into a {@link NoSuchMethodError}.
      *
      * @param declaringClass class declaring the method
      * @param name the name of the method
@@ -248,13 +246,6 @@ public class Lookup {
      */
     public MethodHandle findSpecial(Class<?> declaringClass, String name, MethodType type) {
         try {
-            if(Backport.inUse) {
-                final Method m = declaringClass.getDeclaredMethod(name, type.parameterArray());
-                if(!Modifier.isPublic(declaringClass.getModifiers()) || !Modifier.isPublic(m.getModifiers())) {
-                    m.setAccessible(true);
-                }
-                return unreflect(m);
-            }
             return lookup.findSpecial(declaringClass, name, type, declaringClass);
         } catch(IllegalAccessException e) {
             final IllegalAccessError ee = new IllegalAccessError("Failed to access special method " + methodDescription(

nashorn/src/jdk/internal/dynalink/support/TypeConverterFactory.java

@@ -87,6 +87,8 @@ import java.lang.invoke.MethodHandle;
 import java.lang.invoke.MethodHandles;
 import java.lang.invoke.MethodType;
 import java.lang.invoke.WrongMethodTypeException;
+import java.security.AccessController;
+import java.security.PrivilegedAction;
 import java.util.LinkedList;
 import java.util.List;
 import jdk.internal.dynalink.linker.ConversionComparator;
@@ -110,7 +112,7 @@ public class TypeConverterFactory {
     private final ClassValue<ClassMap<MethodHandle>> converterMap = new ClassValue<ClassMap<MethodHandle>>() {
         @Override
         protected ClassMap<MethodHandle> computeValue(final Class<?> sourceType) {
-            return new ClassMap<MethodHandle>(sourceType.getClassLoader()) {
+            return new ClassMap<MethodHandle>(getClassLoader(sourceType)) {
                 @Override
                 protected MethodHandle computeValue(Class<?> targetType) {
                     try {
@@ -128,7 +130,7 @@ public class TypeConverterFactory {
     private final ClassValue<ClassMap<MethodHandle>> converterIdentityMap = new ClassValue<ClassMap<MethodHandle>>() {
         @Override
         protected ClassMap<MethodHandle> computeValue(final Class<?> sourceType) {
-            return new ClassMap<MethodHandle>(sourceType.getClassLoader()) {
+            return new ClassMap<MethodHandle>(getClassLoader(sourceType)) {
                 @Override
                 protected MethodHandle computeValue(Class<?> targetType) {
                     if(!canAutoConvert(sourceType, targetType)) {
@@ -143,6 +145,15 @@ public class TypeConverterFactory {
         }
     };
 
+    private static final ClassLoader getClassLoader(final Class<?> clazz) {
+        return AccessController.doPrivileged(new PrivilegedAction<ClassLoader>() {
+            @Override
+            public ClassLoader run() {
+                return clazz.getClassLoader();
+            }
+        });
+    }
+
     /**
      * Creates a new type converter factory from the available {@link GuardingTypeConverterFactory} instances.
      *

nashorn/src/jdk/nashorn/internal/codegen/CompileUnit.java

@@ -33,7 +33,7 @@ public class CompileUnit {
     private final String className;
 
     /** Current class generator */
-    private final ClassEmitter classEmitter;
+    private ClassEmitter classEmitter;
 
     private long weight;
 
@@ -64,7 +64,11 @@ public class CompileUnit {
      * @param clazz class with code for this compile unit
      */
     void setCode(final Class<?> clazz) {
+        clazz.getClass(); // null check
         this.clazz = clazz;
+        // Revisit this - refactor to avoid null-ed out non-final fields
+        // null out emitter
+        this.classEmitter = null;
     }
 
     /**

nashorn/src/jdk/nashorn/internal/objects/Global.java

@@ -41,6 +41,8 @@ import java.util.Arrays;
 import java.util.LinkedHashMap;
 import java.util.List;
 import java.util.Map;
+import java.util.concurrent.Callable;
+import java.util.concurrent.ConcurrentHashMap;
 import jdk.internal.dynalink.linker.GuardedInvocation;
 import jdk.internal.dynalink.linker.LinkRequest;
 import jdk.nashorn.internal.objects.annotations.Attribute;
@@ -72,8 +74,8 @@ import jdk.nashorn.internal.scripts.JO;
  */
 @ScriptClass("Global")
 public final class Global extends ScriptObject implements GlobalObject, Scope {
-    private static final InvokeByName TO_STRING = new InvokeByName("toString", ScriptObject.class);
+    private final InvokeByName TO_STRING = new InvokeByName("toString", ScriptObject.class);
-    private static final InvokeByName VALUE_OF  = new InvokeByName("valueOf",  ScriptObject.class);
+    private final InvokeByName VALUE_OF  = new InvokeByName("valueOf",  ScriptObject.class);
 
     /** ECMA 15.1.2.2 parseInt (string , radix) */
     @Property(attributes = Attribute.NOT_ENUMERABLE)
@@ -709,6 +711,35 @@ public final class Global extends ScriptObject implements GlobalObject, Scope {
         classCache.put(source, new SoftReference<Class<?>>(clazz));
     }
 
+    private static <T> T getLazilyCreatedValue(final Object key, final Callable<T> creator, final Map<Object, T> map) {
+        final T obj = map.get(key);
+        if (obj != null) {
+            return obj;
+        }
+
+        try {
+            final T newObj = creator.call();
+            final T existingObj = map.putIfAbsent(key, newObj);
+            return existingObj != null ? existingObj : newObj;
+        } catch (final Exception exp) {
+            throw new RuntimeException(exp);
+        }
+    }
+
+    private final Map<Object, InvokeByName> namedInvokers = new ConcurrentHashMap<>();
+
+    @Override
+    public InvokeByName getInvokeByName(final Object key, final Callable<InvokeByName> creator) {
+        return getLazilyCreatedValue(key, creator, namedInvokers);
+    }
+
+    private final Map<Object, MethodHandle> dynamicInvokers = new ConcurrentHashMap<>();
+
+    @Override
+    public MethodHandle getDynamicInvoker(final Object key, final Callable<MethodHandle> creator) {
+        return getLazilyCreatedValue(key, creator, dynamicInvokers);
+    }
+
     /**
      * This is the eval used when 'indirect' eval call is made.
      *

nashorn/src/jdk/nashorn/internal/objects/NativeArray.java

@@ -39,6 +39,7 @@ import java.util.Collections;
 import java.util.Comparator;
 import java.util.Iterator;
 import java.util.List;
+import java.util.concurrent.Callable;
 import jdk.nashorn.api.scripting.ScriptObjectMirror;
 import jdk.nashorn.internal.objects.annotations.Attribute;
 import jdk.nashorn.internal.objects.annotations.Constructor;
@@ -68,20 +69,88 @@ import jdk.nashorn.internal.runtime.linker.InvokeByName;
  */
 @ScriptClass("Array")
 public final class NativeArray extends ScriptObject {
-    private static final InvokeByName JOIN = new InvokeByName("join", ScriptObject.class);
+    private static final Object JOIN                     = new Object();
+    private static final Object EVERY_CALLBACK_INVOKER   = new Object();
+    private static final Object SOME_CALLBACK_INVOKER    = new Object();
+    private static final Object FOREACH_CALLBACK_INVOKER = new Object();
+    private static final Object MAP_CALLBACK_INVOKER     = new Object();
+    private static final Object FILTER_CALLBACK_INVOKER  = new Object();
+    private static final Object REDUCE_CALLBACK_INVOKER  = new Object();
+    private static final Object CALL_CMP                 = new Object();
+    private static final Object TO_LOCALE_STRING         = new Object();
 
-    private static final MethodHandle EVERY_CALLBACK_INVOKER   = createIteratorCallbackInvoker(boolean.class);
+    private static InvokeByName getJOIN() {
-    private static final MethodHandle SOME_CALLBACK_INVOKER    = createIteratorCallbackInvoker(boolean.class);
+        return Global.instance().getInvokeByName(JOIN,
-    private static final MethodHandle FOREACH_CALLBACK_INVOKER = createIteratorCallbackInvoker(void.class);
+                new Callable<InvokeByName>() {
-    private static final MethodHandle MAP_CALLBACK_INVOKER     = createIteratorCallbackInvoker(Object.class);
+                    @Override
-    private static final MethodHandle FILTER_CALLBACK_INVOKER  = createIteratorCallbackInvoker(boolean.class);
+                    public InvokeByName call() {
+                        return new InvokeByName("join", ScriptObject.class);
+                    }
+                });
+    }
 
-    private static final MethodHandle REDUCE_CALLBACK_INVOKER = Bootstrap.createDynamicInvoker("dyn:call", Object.class,
+    private static MethodHandle createIteratorCallbackInvoker(final Object key, final Class<?> rtype) {
-            Object.class, Undefined.class, Object.class, Object.class, long.class, Object.class);
+        return Global.instance().getDynamicInvoker(key,
-    private static final MethodHandle CALL_CMP                = Bootstrap.createDynamicInvoker("dyn:call", double.class,
+            new Callable<MethodHandle>() {
+                @Override
+                public MethodHandle call() {
+                    return Bootstrap.createDynamicInvoker("dyn:call", rtype, Object.class, Object.class, Object.class,
+                        long.class, Object.class);
+                }
+            });
+    }
+
+    private static MethodHandle getEVERY_CALLBACK_INVOKER() {
+        return createIteratorCallbackInvoker(EVERY_CALLBACK_INVOKER, boolean.class);
+    }
+
+    private static MethodHandle getSOME_CALLBACK_INVOKER() {
+        return createIteratorCallbackInvoker(SOME_CALLBACK_INVOKER, boolean.class);
+    }
+
+    private static MethodHandle getFOREACH_CALLBACK_INVOKER() {
+        return createIteratorCallbackInvoker(FOREACH_CALLBACK_INVOKER, void.class);
+    }
+
+    private static MethodHandle getMAP_CALLBACK_INVOKER() {
+        return createIteratorCallbackInvoker(MAP_CALLBACK_INVOKER, Object.class);
+    }
+
+    private static MethodHandle getFILTER_CALLBACK_INVOKER() {
+        return createIteratorCallbackInvoker(FILTER_CALLBACK_INVOKER, boolean.class);
+    }
+
+    private static MethodHandle getREDUCE_CALLBACK_INVOKER() {
+        return Global.instance().getDynamicInvoker(REDUCE_CALLBACK_INVOKER,
+                new Callable<MethodHandle>() {
+                    @Override
+                    public MethodHandle call() {
+                        return Bootstrap.createDynamicInvoker("dyn:call", Object.class, Object.class,
+                             Undefined.class, Object.class, Object.class, long.class, Object.class);
+                    }
+                });
+    }
+
+    private static MethodHandle getCALL_CMP() {
+        return Global.instance().getDynamicInvoker(CALL_CMP,
+                new Callable<MethodHandle>() {
+                    @Override
+                    public MethodHandle call() {
+                        return Bootstrap.createDynamicInvoker("dyn:call", double.class,
                             ScriptFunction.class, Object.class, Object.class, Object.class);
+                    }
+                });
+    }
 
-    private static final InvokeByName TO_LOCALE_STRING = new InvokeByName("toLocaleString", ScriptObject.class, String.class);
+    private static InvokeByName getTO_LOCALE_STRING() {
+        return Global.instance().getInvokeByName(TO_LOCALE_STRING,
+                new Callable<InvokeByName>() {
+                    @Override
+                    public InvokeByName call() {
+                        return new InvokeByName("toLocaleString", ScriptObject.class, String.class);
+                    }
+                });
+    }
 
     // initialized by nasgen
     private static PropertyMap $nasgenmap$;
@@ -357,11 +426,12 @@ public final class NativeArray extends ScriptObject {
     public static Object toString(final Object self) {
         final Object obj = Global.toObject(self);
         if (obj instanceof ScriptObject) {
+            final InvokeByName joinInvoker = getJOIN();
             final ScriptObject sobj = (ScriptObject)obj;
             try {
-                final Object join = JOIN.getGetter().invokeExact(sobj);
+                final Object join = joinInvoker.getGetter().invokeExact(sobj);
                 if (Bootstrap.isCallable(join)) {
-                    return JOIN.getInvoker().invokeExact(join, sobj);
+                    return joinInvoker.getInvoker().invokeExact(join, sobj);
                 }
             } catch (final RuntimeException | Error e) {
                 throw e;
@@ -393,11 +463,12 @@ public final class NativeArray extends ScriptObject {
 
                 try {
                     if (val instanceof ScriptObject) {
+                        final InvokeByName localeInvoker = getTO_LOCALE_STRING();
                         final ScriptObject sobj           = (ScriptObject)val;
-                        final Object       toLocaleString = TO_LOCALE_STRING.getGetter().invokeExact(sobj);
+                        final Object       toLocaleString = localeInvoker.getGetter().invokeExact(sobj);
 
                         if (Bootstrap.isCallable(toLocaleString)) {
-                            sb.append((String)TO_LOCALE_STRING.getInvoker().invokeExact(toLocaleString, sobj));
+                            sb.append((String)localeInvoker.getInvoker().invokeExact(toLocaleString, sobj));
                         } else {
                             throw typeError("not.a.function", "toLocaleString");
                         }
@@ -814,6 +885,7 @@ public final class NativeArray extends ScriptObject {
         final Object cmpThis = cmp == null || cmp.isStrict() ? ScriptRuntime.UNDEFINED : Global.instance();
 
         Collections.sort(list, new Comparator<Object>() {
+            private final MethodHandle call_cmp = getCALL_CMP();
             @Override
             public int compare(final Object x, final Object y) {
                 if (x == ScriptRuntime.UNDEFINED && y == ScriptRuntime.UNDEFINED) {
@@ -826,7 +898,7 @@ public final class NativeArray extends ScriptObject {
 
                 if (cmp != null) {
                     try {
-                        return (int)Math.signum((double)CALL_CMP.invokeExact(cmp, cmpThis, x, y));
+                        return (int)Math.signum((double)call_cmp.invokeExact(cmp, cmpThis, x, y));
                     } catch (final RuntimeException | Error e) {
                         throw e;
                     } catch (final Throwable t) {
@@ -1103,9 +1175,11 @@ public final class NativeArray extends ScriptObject {
 
     private static boolean applyEvery(final Object self, final Object callbackfn, final Object thisArg) {
         return new IteratorAction<Boolean>(Global.toObject(self), callbackfn, thisArg, true) {
+            private final MethodHandle everyInvoker = getEVERY_CALLBACK_INVOKER();
+
             @Override
             protected boolean forEach(final Object val, final long i) throws Throwable {
-                return (result = (boolean)EVERY_CALLBACK_INVOKER.invokeExact(callbackfn, thisArg, val, i, self));
+                return (result = (boolean)everyInvoker.invokeExact(callbackfn, thisArg, val, i, self));
             }
         }.apply();
     }
@@ -1121,9 +1195,11 @@ public final class NativeArray extends ScriptObject {
     @Function(attributes = Attribute.NOT_ENUMERABLE, arity = 1)
     public static Object some(final Object self, final Object callbackfn, final Object thisArg) {
         return new IteratorAction<Boolean>(Global.toObject(self), callbackfn, thisArg, false) {
+            private final MethodHandle someInvoker = getSOME_CALLBACK_INVOKER();
+
             @Override
             protected boolean forEach(final Object val, final long i) throws Throwable {
-                return !(result = (boolean)SOME_CALLBACK_INVOKER.invokeExact(callbackfn, thisArg, val, i, self));
+                return !(result = (boolean)someInvoker.invokeExact(callbackfn, thisArg, val, i, self));
             }
         }.apply();
     }
@@ -1139,9 +1215,11 @@ public final class NativeArray extends ScriptObject {
     @Function(attributes = Attribute.NOT_ENUMERABLE, arity = 1)
     public static Object forEach(final Object self, final Object callbackfn, final Object thisArg) {
         return new IteratorAction<Object>(Global.toObject(self), callbackfn, thisArg, ScriptRuntime.UNDEFINED) {
+            private final MethodHandle forEachInvoker = getFOREACH_CALLBACK_INVOKER();
+
             @Override
             protected boolean forEach(final Object val, final long i) throws Throwable {
-                FOREACH_CALLBACK_INVOKER.invokeExact(callbackfn, thisArg, val, i, self);
+                forEachInvoker.invokeExact(callbackfn, thisArg, val, i, self);
                 return true;
             }
         }.apply();
@@ -1158,9 +1236,11 @@ public final class NativeArray extends ScriptObject {
     @Function(attributes = Attribute.NOT_ENUMERABLE, arity = 1)
     public static Object map(final Object self, final Object callbackfn, final Object thisArg) {
         return new IteratorAction<NativeArray>(Global.toObject(self), callbackfn, thisArg, null) {
+            private final MethodHandle mapInvoker = getMAP_CALLBACK_INVOKER();
+
             @Override
             protected boolean forEach(final Object val, final long i) throws Throwable {
-                final Object r = MAP_CALLBACK_INVOKER.invokeExact(callbackfn, thisArg, val, i, self);
+                final Object r = mapInvoker.invokeExact(callbackfn, thisArg, val, i, self);
                 result.defineOwnProperty(ArrayIndex.getArrayIndex(index), r);
                 return true;
             }
@@ -1186,10 +1266,11 @@ public final class NativeArray extends ScriptObject {
     public static Object filter(final Object self, final Object callbackfn, final Object thisArg) {
         return new IteratorAction<NativeArray>(Global.toObject(self), callbackfn, thisArg, new NativeArray()) {
             private long to = 0;
+            private final MethodHandle filterInvoker = getFILTER_CALLBACK_INVOKER();
 
             @Override
             protected boolean forEach(final Object val, final long i) throws Throwable {
-                if ((boolean)FILTER_CALLBACK_INVOKER.invokeExact(callbackfn, thisArg, val, i, self)) {
+                if ((boolean)filterInvoker.invokeExact(callbackfn, thisArg, val, i, self)) {
                     result.defineOwnProperty(ArrayIndex.getArrayIndex(to++), val);
                 }
                 return true;
@@ -1217,10 +1298,12 @@ public final class NativeArray extends ScriptObject {
 
         //if initial value is ScriptRuntime.UNDEFINED - step forward once.
         return new IteratorAction<Object>(Global.toObject(self), callbackfn, ScriptRuntime.UNDEFINED, initialValue, iter) {
+            private final MethodHandle reduceInvoker = getREDUCE_CALLBACK_INVOKER();
+
             @Override
             protected boolean forEach(final Object val, final long i) throws Throwable {
                 // TODO: why can't I declare the second arg as Undefined.class?
-                result = REDUCE_CALLBACK_INVOKER.invokeExact(callbackfn, ScriptRuntime.UNDEFINED, result, val, i, self);
+                result = reduceInvoker.invokeExact(callbackfn, ScriptRuntime.UNDEFINED, result, val, i, self);
                 return true;
             }
         }.apply();
@@ -1273,10 +1356,4 @@ public final class NativeArray extends ScriptObject {
 
         return false;
     }
-
-    private static MethodHandle createIteratorCallbackInvoker(final Class<?> rtype) {
-        return Bootstrap.createDynamicInvoker("dyn:call", rtype, Object.class, Object.class, Object.class,
-                long.class, Object.class);
-
-    }
 }

nashorn/src/jdk/nashorn/internal/objects/NativeDate.java

@@ -33,6 +33,7 @@ import static jdk.nashorn.internal.runtime.ECMAErrors.typeError;
 
 import java.util.Locale;
 import java.util.TimeZone;
+import java.util.concurrent.Callable;
 import jdk.nashorn.internal.objects.annotations.Attribute;
 import jdk.nashorn.internal.objects.annotations.Constructor;
 import jdk.nashorn.internal.objects.annotations.Function;
@@ -95,8 +96,17 @@ public final class NativeDate extends ScriptObject {
             "Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
     };
 
-    private static final InvokeByName TO_ISO_STRING = new InvokeByName("toISOString", ScriptObject.class, Object.class,
+    private static final Object TO_ISO_STRING = new Object();
-            Object.class);
+
+    private static InvokeByName getTO_ISO_STRING() {
+        return Global.instance().getInvokeByName(TO_ISO_STRING,
+                new Callable<InvokeByName>() {
+                    @Override
+                    public InvokeByName call() {
+                        return new InvokeByName("toISOString", ScriptObject.class, Object.class, Object.class);
+                    }
+                });
+    }
 
     private double time;
     private final TimeZone timezone;
@@ -861,9 +871,10 @@ public final class NativeDate extends ScriptObject {
         }
 
         try {
-            final Object func = TO_ISO_STRING.getGetter().invokeExact(sobj);
+            final InvokeByName toIsoString = getTO_ISO_STRING();
+            final Object func = toIsoString.getGetter().invokeExact(sobj);
             if (Bootstrap.isCallable(func)) {
-                return TO_ISO_STRING.getInvoker().invokeExact(func, sobj, key);
+                return toIsoString.getInvoker().invokeExact(func, sobj, key);
             }
             throw typeError("not.a.function", ScriptRuntime.safeToString(func));
         } catch (final RuntimeException | Error e) {

nashorn/src/jdk/nashorn/internal/objects/NativeJSON.java

@@ -35,6 +35,7 @@ import java.util.IdentityHashMap;
 import java.util.Iterator;
 import java.util.List;
 import java.util.Map;
+import java.util.concurrent.Callable;
 import jdk.nashorn.internal.objects.annotations.Attribute;
 import jdk.nashorn.internal.objects.annotations.Function;
 import jdk.nashorn.internal.objects.annotations.ScriptClass;
@@ -55,9 +56,31 @@ import jdk.nashorn.internal.runtime.linker.InvokeByName;
  */
 @ScriptClass("JSON")
 public final class NativeJSON extends ScriptObject {
-    private static final InvokeByName TO_JSON = new InvokeByName("toJSON", ScriptObject.class, Object.class, Object.class);
+    private static final Object TO_JSON = new Object();
-    private static final MethodHandle REPLACER_INVOKER = Bootstrap.createDynamicInvoker("dyn:call", Object.class,
+
+    private static InvokeByName getTO_JSON() {
+        return Global.instance().getInvokeByName(TO_JSON,
+                new Callable<InvokeByName>() {
+                    @Override
+                    public InvokeByName call() {
+                        return new InvokeByName("toJSON", ScriptObject.class, Object.class, Object.class);
+                    }
+                });
+    }
+
+
+    private static final Object REPLACER_INVOKER = new Object();
+
+    private static MethodHandle getREPLACER_INVOKER() {
+        return Global.instance().getDynamicInvoker(REPLACER_INVOKER,
+                new Callable<MethodHandle>() {
+                    @Override
+                    public MethodHandle call() {
+                        return Bootstrap.createDynamicInvoker("dyn:call", Object.class,
                             ScriptFunction.class, ScriptObject.class, Object.class, Object.class);
+                    }
+                });
+    }
 
     // initialized by nasgen
     @SuppressWarnings("unused")
@@ -187,15 +210,16 @@ public final class NativeJSON extends ScriptObject {
 
         try {
             if (value instanceof ScriptObject) {
+                final InvokeByName toJSONInvoker = getTO_JSON();
                 final ScriptObject svalue = (ScriptObject)value;
-                final Object toJSON = TO_JSON.getGetter().invokeExact(svalue);
+                final Object toJSON = toJSONInvoker.getGetter().invokeExact(svalue);
                 if (Bootstrap.isCallable(toJSON)) {
-                    value = TO_JSON.getInvoker().invokeExact(toJSON, svalue, key);
+                    value = toJSONInvoker.getInvoker().invokeExact(toJSON, svalue, key);
                 }
             }
 
             if (state.replacerFunction != null) {
-                value = REPLACER_INVOKER.invokeExact(state.replacerFunction, holder, key, value);
+                value = getREPLACER_INVOKER().invokeExact(state.replacerFunction, holder, key, value);
             }
         } catch(Error|RuntimeException t) {
             throw t;

nashorn/src/jdk/nashorn/internal/objects/NativeObject.java

@@ -36,6 +36,7 @@ import java.util.Collection;
 import java.util.HashSet;
 import java.util.List;
 import java.util.Set;
+import java.util.concurrent.Callable;
 import jdk.internal.dynalink.beans.BeansLinker;
 import jdk.internal.dynalink.beans.StaticClass;
 import jdk.internal.dynalink.linker.GuardedInvocation;
@@ -70,7 +71,18 @@ import jdk.nashorn.internal.runtime.linker.InvokeByName;
  */
 @ScriptClass("Object")
 public final class NativeObject {
-    private static final InvokeByName TO_STRING = new InvokeByName("toString", ScriptObject.class);
+    private static final Object TO_STRING = new Object();
+
+    private static InvokeByName getTO_STRING() {
+        return Global.instance().getInvokeByName(TO_STRING,
+                new Callable<InvokeByName>() {
+                    @Override
+                    public InvokeByName call() {
+                        return new InvokeByName("toString", ScriptObject.class);
+                    }
+                });
+    }
+
     private static final MethodType MIRROR_GETTER_TYPE = MethodType.methodType(Object.class, ScriptObjectMirror.class);
     private static final MethodType MIRROR_SETTER_TYPE = MethodType.methodType(Object.class, ScriptObjectMirror.class, Object.class);
 
@@ -402,12 +414,13 @@ public final class NativeObject {
     public static Object toLocaleString(final Object self) {
         final Object obj = JSType.toScriptObject(self);
         if (obj instanceof ScriptObject) {
+            final InvokeByName toStringInvoker = getTO_STRING();
             final ScriptObject sobj = (ScriptObject)self;
             try {
-                final Object toString = TO_STRING.getGetter().invokeExact(sobj);
+                final Object toString = toStringInvoker.getGetter().invokeExact(sobj);
 
                 if (Bootstrap.isCallable(toString)) {
-                    return TO_STRING.getInvoker().invokeExact(toString, sobj);
+                    return toStringInvoker.getInvoker().invokeExact(toString, sobj);
                 }
             } catch (final RuntimeException | Error e) {
                 throw e;

nashorn/src/jdk/nashorn/internal/runtime/GlobalObject.java

@@ -26,8 +26,10 @@
 package jdk.nashorn.internal.runtime;
 
 import java.lang.invoke.MethodHandle;
+import java.util.concurrent.Callable;
 import jdk.internal.dynalink.linker.GuardedInvocation;
 import jdk.internal.dynalink.linker.LinkRequest;
+import jdk.nashorn.internal.runtime.linker.InvokeByName;
 
 /**
  * Runtime interface to the global scope objects.
@@ -210,4 +212,20 @@ public interface GlobalObject {
      * @param clazz compiled Class object for the source
      */
     public void cacheClass(Source source, Class<?> clazz);
+
+    /**
+     * Get cached InvokeByName object for the given key
+     * @param key key to be associated with InvokeByName object
+     * @param creator if InvokeByName is absent 'creator' is called to make one (lazy init)
+     * @return InvokeByName object associated with the key.
+     */
+    public InvokeByName getInvokeByName(final Object key, final Callable<InvokeByName> creator);
+
+    /**
+     * Get cached dynamic method handle for the given key
+     * @param key key to be associated with dynamic method handle
+     * @param creator if method handle is absent 'creator' is called to make one (lazy init)
+     * @return dynamic method handle associated with the key.
+     */
+    public MethodHandle getDynamicInvoker(final Object key, final Callable<MethodHandle> creator);
 }

nashorn/src/jdk/nashorn/internal/runtime/JSONFunctions.java

@@ -27,6 +27,7 @@ package jdk.nashorn.internal.runtime;
 
 import java.lang.invoke.MethodHandle;
 import java.util.Iterator;
+import java.util.concurrent.Callable;
 import jdk.nashorn.internal.ir.LiteralNode;
 import jdk.nashorn.internal.ir.Node;
 import jdk.nashorn.internal.ir.ObjectNode;
@@ -42,8 +43,19 @@ import jdk.nashorn.internal.runtime.linker.Bootstrap;
  */
 public final class JSONFunctions {
     private JSONFunctions() {}
-    private static final MethodHandle REVIVER_INVOKER = Bootstrap.createDynamicInvoker("dyn:call", Object.class,
+
+    private static final Object REVIVER_INVOKER = new Object();
+
+    private static MethodHandle getREVIVER_INVOKER() {
+        return ((GlobalObject)Context.getGlobal()).getDynamicInvoker(REVIVER_INVOKER,
+                new Callable<MethodHandle>() {
+                    @Override
+                    public MethodHandle call() {
+                        return Bootstrap.createDynamicInvoker("dyn:call", Object.class,
                             ScriptFunction.class, ScriptObject.class, String.class, Object.class);
+                    }
+                });
+    }
 
     /**
      * Returns JSON-compatible quoted version of the given string.
@@ -117,7 +129,7 @@ public final class JSONFunctions {
 
         try {
              // Object.class, ScriptFunction.class, ScriptObject.class, String.class, Object.class);
-             return REVIVER_INVOKER.invokeExact(reviver, holder, JSType.toString(name), val);
+             return getREVIVER_INVOKER().invokeExact(reviver, holder, JSType.toString(name), val);
         } catch(Error|RuntimeException t) {
             throw t;
         } catch(final Throwable t) {

nashorn/src/jdk/nashorn/internal/runtime/ListAdapter.java

@@ -31,6 +31,7 @@ import java.util.Iterator;
 import java.util.ListIterator;
 import java.util.NoSuchElementException;
 import java.util.RandomAccess;
+import java.util.concurrent.Callable;
 import jdk.nashorn.internal.runtime.linker.Bootstrap;
 import jdk.nashorn.internal.runtime.linker.InvokeByName;
 
@@ -49,16 +50,73 @@ import jdk.nashorn.internal.runtime.linker.InvokeByName;
  */
 public final class ListAdapter extends AbstractList<Object> implements RandomAccess, Deque<Object> {
     // These add to the back and front of the list
-    private static final InvokeByName PUSH    = new InvokeByName("push",    ScriptObject.class, void.class, Object.class);
+    private static final Object PUSH    = new Object();
-    private static final InvokeByName UNSHIFT = new InvokeByName("unshift", ScriptObject.class, void.class, Object.class);
+    private static InvokeByName getPUSH() {
+        return ((GlobalObject)Context.getGlobal()).getInvokeByName(PUSH,
+                new Callable<InvokeByName>() {
+                    @Override
+                    public InvokeByName call() {
+                        return new InvokeByName("push", ScriptObject.class, void.class, Object.class);
+                    }
+                });
+    }
+
+    private static final Object UNSHIFT = new Object();
+    private static InvokeByName getUNSHIFT() {
+        return ((GlobalObject)Context.getGlobal()).getInvokeByName(UNSHIFT,
+                new Callable<InvokeByName>() {
+                    @Override
+                    public InvokeByName call() {
+                        return new InvokeByName("unshift", ScriptObject.class, void.class, Object.class);
+                    }
+                });
+    }
 
     // These remove from the back and front of the list
-    private static final InvokeByName POP   = new InvokeByName("pop",   ScriptObject.class, Object.class);
+    private static final Object POP = new Object();
-    private static final InvokeByName SHIFT = new InvokeByName("shift", ScriptObject.class, Object.class);
+    private static InvokeByName getPOP() {
+        return ((GlobalObject)Context.getGlobal()).getInvokeByName(POP,
+                new Callable<InvokeByName>() {
+                    @Override
+                    public InvokeByName call() {
+                        return new InvokeByName("pop", ScriptObject.class, Object.class);
+                    }
+                });
+    }
+
+    private static final Object SHIFT = new Object();
+    private static InvokeByName getSHIFT() {
+        return ((GlobalObject)Context.getGlobal()).getInvokeByName(SHIFT,
+                new Callable<InvokeByName>() {
+                    @Override
+                    public InvokeByName call() {
+                        return new InvokeByName("shift", ScriptObject.class, Object.class);
+                    }
+                });
+    }
 
     // These insert and remove in the middle of the list
-    private static final InvokeByName SPLICE_ADD    = new InvokeByName("splice", ScriptObject.class, void.class, int.class, int.class, Object.class);
+    private static final Object SPLICE_ADD = new Object();
-    private static final InvokeByName SPLICE_REMOVE = new InvokeByName("splice", ScriptObject.class, void.class, int.class, int.class);
+    private static InvokeByName getSPLICE_ADD() {
+        return ((GlobalObject)Context.getGlobal()).getInvokeByName(SPLICE_ADD,
+                new Callable<InvokeByName>() {
+                    @Override
+                    public InvokeByName call() {
+                        return new InvokeByName("splice", ScriptObject.class, void.class, int.class, int.class, Object.class);
+                    }
+                });
+    }
+
+    private static final Object SPLICE_REMOVE = new Object();
+    private static InvokeByName getSPLICE_REMOVE() {
+        return ((GlobalObject)Context.getGlobal()).getInvokeByName(SPLICE_REMOVE,
+                new Callable<InvokeByName>() {
+                    @Override
+                    public InvokeByName call() {
+                        return new InvokeByName("splice", ScriptObject.class, void.class, int.class, int.class);
+                    }
+                });
+    }
 
     private final ScriptObject obj;
 
@@ -109,9 +167,10 @@ public final class ListAdapter extends AbstractList<Object> implements RandomAcc
     @Override
     public void addFirst(Object e) {
         try {
-            final Object fn = UNSHIFT.getGetter().invokeExact(obj);
+            final InvokeByName unshiftInvoker = getUNSHIFT();
-            checkFunction(fn, UNSHIFT);
+            final Object fn = unshiftInvoker.getGetter().invokeExact(obj);
-            UNSHIFT.getInvoker().invokeExact(fn, obj, e);
+            checkFunction(fn, unshiftInvoker);
+            unshiftInvoker.getInvoker().invokeExact(fn, obj, e);
         } catch(RuntimeException | Error ex) {
             throw ex;
         } catch(Throwable t) {
@@ -122,9 +181,10 @@ public final class ListAdapter extends AbstractList<Object> implements RandomAcc
     @Override
     public void addLast(Object e) {
         try {
-            final Object fn = PUSH.getGetter().invokeExact(obj);
+            final InvokeByName pushInvoker = getPUSH();
-            checkFunction(fn, PUSH);
+            final Object fn = pushInvoker.getGetter().invokeExact(obj);
-            PUSH.getInvoker().invokeExact(fn, obj, e);
+            checkFunction(fn, pushInvoker);
+            pushInvoker.getInvoker().invokeExact(fn, obj, e);
         } catch(RuntimeException | Error ex) {
             throw ex;
         } catch(Throwable t) {
@@ -142,9 +202,10 @@ public final class ListAdapter extends AbstractList<Object> implements RandomAcc
             } else {
                 final int size = size();
                 if(index < size) {
-                    final Object fn = SPLICE_ADD.getGetter().invokeExact(obj);
+                    final InvokeByName spliceAddInvoker = getSPLICE_ADD();
-                    checkFunction(fn, SPLICE_ADD);
+                    final Object fn = spliceAddInvoker.getGetter().invokeExact(obj);
-                    SPLICE_ADD.getInvoker().invokeExact(fn, obj, index, 0, e);
+                    checkFunction(fn, spliceAddInvoker);
+                    spliceAddInvoker.getInvoker().invokeExact(fn, obj, index, 0, e);
                 } else if(index == size) {
                     addLast(e);
                 } else {
@@ -234,9 +295,10 @@ public final class ListAdapter extends AbstractList<Object> implements RandomAcc
 
     private Object invokeShift() {
         try {
-            final Object fn = SHIFT.getGetter().invokeExact(obj);
+            final InvokeByName shiftInvoker = getSHIFT();
-            checkFunction(fn, SHIFT);
+            final Object fn = shiftInvoker.getGetter().invokeExact(obj);
-            return SHIFT.getInvoker().invokeExact(fn, obj);
+            checkFunction(fn, shiftInvoker);
+            return shiftInvoker.getInvoker().invokeExact(fn, obj);
         } catch(RuntimeException | Error ex) {
             throw ex;
         } catch(Throwable t) {
@@ -246,9 +308,10 @@ public final class ListAdapter extends AbstractList<Object> implements RandomAcc
 
     private Object invokePop() {
         try {
-            final Object fn = POP.getGetter().invokeExact(obj);
+            final InvokeByName popInvoker = getPOP();
-            checkFunction(fn, POP);
+            final Object fn = popInvoker.getGetter().invokeExact(obj);
-            return POP.getInvoker().invokeExact(fn, obj);
+            checkFunction(fn, popInvoker);
+            return popInvoker.getInvoker().invokeExact(fn, obj);
         } catch(RuntimeException | Error ex) {
             throw ex;
         } catch(Throwable t) {
@@ -263,9 +326,10 @@ public final class ListAdapter extends AbstractList<Object> implements RandomAcc
 
     private void invokeSpliceRemove(int fromIndex, int count) {
         try {
-            final Object fn = SPLICE_REMOVE.getGetter().invokeExact(obj);
+            final InvokeByName spliceRemoveInvoker = getSPLICE_REMOVE();
-            checkFunction(fn, SPLICE_REMOVE);
+            final Object fn = spliceRemoveInvoker.getGetter().invokeExact(obj);
-            SPLICE_REMOVE.getInvoker().invokeExact(fn, obj, fromIndex, count);
+            checkFunction(fn, spliceRemoveInvoker);
+            spliceRemoveInvoker.getInvoker().invokeExact(fn, obj, fromIndex, count);
         } catch(RuntimeException | Error ex) {
             throw ex;
         } catch(Throwable t) {

nashorn/src/jdk/nashorn/internal/runtime/RecompilableScriptFunctionData.java

@@ -52,13 +52,19 @@ import jdk.nashorn.internal.parser.TokenType;
 public final class RecompilableScriptFunctionData extends ScriptFunctionData {
 
     /** FunctionNode with the code for this ScriptFunction */
-    private FunctionNode functionNode;
+    private volatile FunctionNode functionNode;
+
+    /** Source from which FunctionNode was parsed. */
+    private final Source source;
+
+    /** Token of this function within the source. */
+    private final long token;
 
     /** Allocator map from makeMap() */
     private final PropertyMap allocatorMap;
 
     /** Code installer used for all further recompilation/specialization of this ScriptFunction */
-    private final CodeInstaller<ScriptEnvironment> installer;
+    private volatile CodeInstaller<ScriptEnvironment> installer;
 
     /** Name of class where allocator function resides */
     private final String allocatorClassName;
@@ -103,6 +109,8 @@ public final class RecompilableScriptFunctionData extends ScriptFunctionData {
               true);
 
         this.functionNode       = functionNode;
+        this.source             = functionNode.getSource();
+        this.token              = tokenFor(functionNode);
         this.installer          = installer;
         this.allocatorClassName = allocatorClassName;
         this.allocatorMap       = allocatorMap;
@@ -110,9 +118,6 @@ public final class RecompilableScriptFunctionData extends ScriptFunctionData {
 
     @Override
     String toSource() {
-        final Source source = functionNode.getSource();
-        final long   token  = tokenFor(functionNode);
-
         if (source != null && token != 0) {
             return source.getString(Token.descPosition(token), Token.descLength(token));
         }
@@ -123,8 +128,6 @@ public final class RecompilableScriptFunctionData extends ScriptFunctionData {
     @Override
     public String toString() {
         final StringBuilder sb = new StringBuilder();
-        final Source source = functionNode.getSource();
-        final long   token  = tokenFor(functionNode);
 
         if (source != null) {
             sb.append(source.getName())
@@ -190,6 +193,12 @@ public final class RecompilableScriptFunctionData extends ScriptFunctionData {
 
          // code exists - look it up and add it into the automatically sorted invoker list
          addCode(functionNode);
+
+         if (! functionNode.canSpecialize()) {
+             // allow GC to claim IR stuff that is not needed anymore
+             functionNode = null;
+             installer = null;
+         }
     }
 
     private MethodHandle addCode(final FunctionNode fn) {
@@ -325,7 +334,7 @@ public final class RecompilableScriptFunctionData extends ScriptFunctionData {
          * footprint too large to store a parse snapshot, or if it is meaningless
          * to do so, such as e.g. for runScript
          */
-        if (!functionNode.canSpecialize()) {
+        if (functionNode == null || !functionNode.canSpecialize()) {
             return mh;
         }
 

nashorn/src/jdk/nashorn/internal/runtime/ScriptFunction.java

@@ -496,32 +496,24 @@ public abstract class ScriptFunction extends ScriptObject {
         MethodHandle boundHandle;
         MethodHandle guard = null;
 
+        final boolean scopeCall = NashornCallSiteDescriptor.isScope(desc);
+
         if (data.needsCallee()) {
             final MethodHandle callHandle = getBestInvoker(type, request.getArguments());
-            if (NashornCallSiteDescriptor.isScope(desc)) {
+            if (scopeCall) {
                 // Make a handle that drops the passed "this" argument and substitutes either Global or Undefined
                 // (callee, this, args...) => (callee, args...)
                 boundHandle = MH.insertArguments(callHandle, 1, needsWrappedThis() ? Context.getGlobalTrusted() : ScriptRuntime.UNDEFINED);
                 // (callee, args...) => (callee, [this], args...)
                 boundHandle = MH.dropArguments(boundHandle, 1, Object.class);
+
             } else {
                 // It's already (callee, this, args...), just what we need
                 boundHandle = callHandle;
-
-                // For non-strict functions, check whether this-object is primitive type.
-                // If so add a to-object-wrapper argument filter.
-                // Else install a guard that will trigger a relink when the argument becomes primitive.
-                if (needsWrappedThis()) {
-                    if (ScriptFunctionData.isPrimitiveThis(request.getArguments()[1])) {
-                        boundHandle = MH.filterArguments(boundHandle, 1, WRAPFILTER);
-                    } else {
-                        guard = getNonStrictFunctionGuard(this);
-                    }
-                }
             }
         } else {
             final MethodHandle callHandle = getBestInvoker(type.dropParameterTypes(0, 1), request.getArguments());
-            if (NashornCallSiteDescriptor.isScope(desc)) {
+            if (scopeCall) {
                 // Make a handle that drops the passed "this" argument and substitutes either Global or Undefined
                 // (this, args...) => (args...)
                 boundHandle = MH.bindTo(callHandle, needsWrappedThis() ? Context.getGlobalTrusted() : ScriptRuntime.UNDEFINED);
@@ -533,6 +525,17 @@ public abstract class ScriptFunction extends ScriptObject {
             }
         }
 
+        // For non-strict functions, check whether this-object is primitive type.
+        // If so add a to-object-wrapper argument filter.
+        // Else install a guard that will trigger a relink when the argument becomes primitive.
+        if (!scopeCall && needsWrappedThis()) {
+            if (ScriptFunctionData.isPrimitiveThis(request.getArguments()[1])) {
+                boundHandle = MH.filterArguments(boundHandle, 1, WRAPFILTER);
+            } else {
+                guard = getNonStrictFunctionGuard(this);
+            }
+        }
+
         boundHandle = pairArguments(boundHandle, type);
 
         return new GuardedInvocation(boundHandle, guard == null ? getFunctionGuard(this) : guard);

nashorn/src/jdk/nashorn/internal/runtime/UserAccessorProperty.java

@@ -27,6 +27,7 @@ package jdk.nashorn.internal.runtime;
 
 import java.lang.invoke.MethodHandle;
 import java.lang.invoke.MethodHandles;
+import java.util.concurrent.Callable;
 
 import jdk.nashorn.internal.codegen.CompilerConstants;
 import jdk.nashorn.internal.lookup.Lookup;
@@ -68,12 +69,32 @@ public final class UserAccessorProperty extends Property {
             "userAccessorSetter", void.class, ScriptObject.class, int.class, String.class, Object.class, Object.class);
 
     /** Dynamic invoker for getter */
-    private static final MethodHandle INVOKE_UA_GETTER = Bootstrap.createDynamicInvoker("dyn:call", Object.class,
+    private static final Object INVOKE_UA_GETTER = new Object();
+
+    private static MethodHandle getINVOKE_UA_GETTER() {
+
+        return ((GlobalObject)Context.getGlobal()).getDynamicInvoker(INVOKE_UA_GETTER,
+                new Callable<MethodHandle>() {
+                    @Override
+                    public MethodHandle call() {
+                        return Bootstrap.createDynamicInvoker("dyn:call", Object.class,
                             Object.class, Object.class);
+                    }
+                });
+    }
 
     /** Dynamic invoker for setter */
-    private static final MethodHandle INVOKE_UA_SETTER = Bootstrap.createDynamicInvoker("dyn:call", void.class,
+    private static Object INVOKE_UA_SETTER = new Object();
+    private static MethodHandle getINVOKE_UA_SETTER() {
+        return ((GlobalObject)Context.getGlobal()).getDynamicInvoker(INVOKE_UA_SETTER,
+                new Callable<MethodHandle>() {
+                    @Override
+                    public MethodHandle call() {
+                        return Bootstrap.createDynamicInvoker("dyn:call", void.class,
                             Object.class, Object.class, Object.class);
+                    }
+                });
+    }
 
     /**
      * Constructor
@@ -191,7 +212,7 @@ public final class UserAccessorProperty extends Property {
 
         if (func instanceof ScriptFunction) {
             try {
-                return INVOKE_UA_GETTER.invokeExact(func, self);
+                return getINVOKE_UA_GETTER().invokeExact(func, self);
             } catch(final Error|RuntimeException t) {
                 throw t;
             } catch(final Throwable t) {
@@ -208,7 +229,7 @@ public final class UserAccessorProperty extends Property {
 
         if (func instanceof ScriptFunction) {
             try {
-                INVOKE_UA_SETTER.invokeExact(func, self, value);
+                getINVOKE_UA_SETTER().invokeExact(func, self, value);
             } catch(final Error|RuntimeException t) {
                 throw t;
             } catch(final Throwable t) {

nashorn/src/jdk/nashorn/internal/runtime/linker/Bootstrap.java

@@ -68,6 +68,10 @@ public final class Bootstrap {
         if (relinkThreshold > -1) {
             factory.setUnstableRelinkThreshold(relinkThreshold);
         }
+
+        // Linkers for any additional language runtimes deployed alongside Nashorn will be picked up by the factory.
+        factory.setClassLoader(Bootstrap.class.getClassLoader());
+
         dynamicLinker = factory.createLinker();
     }
 

nashorn/src/jdk/nashorn/internal/runtime/linker/JavaAdapterClassLoader.java

@@ -48,13 +48,20 @@ final class JavaAdapterClassLoader {
     private static final ProtectionDomain GENERATED_PROTECTION_DOMAIN = createGeneratedProtectionDomain();
 
     private final String className;
-    private final byte[] classBytes;
+    private volatile byte[] classBytes;
 
     JavaAdapterClassLoader(String className, byte[] classBytes) {
         this.className = className.replace('/', '.');
         this.classBytes = classBytes;
     }
 
+    /**
+     * clear classBytes after loading class.
+     */
+    void clearClassBytes() {
+       this.classBytes = null;
+    }
+
     /**
      * Loads the generated adapter class into the JVM.
      * @param parentLoader the parent class loader for the generated class loader
@@ -103,6 +110,7 @@ final class JavaAdapterClassLoader {
             @Override
             protected Class<?> findClass(final String name) throws ClassNotFoundException {
                 if(name.equals(className)) {
+                    assert classBytes != null : "what? already cleared .class bytes!!";
                     return defineClass(name, classBytes, 0, classBytes.length, GENERATED_PROTECTION_DOMAIN);
                 } else {
                     throw new ClassNotFoundException(name);

nashorn/src/jdk/nashorn/internal/runtime/linker/JavaAdapterFactory.java

@@ -224,7 +224,10 @@ public final class JavaAdapterFactory {
             this.commonLoader = findCommonLoader(definingLoader);
             final JavaAdapterBytecodeGenerator gen = new JavaAdapterBytecodeGenerator(superClass, interfaces, commonLoader, false);
             this.autoConvertibleFromFunction = gen.isAutoConvertibleFromFunction();
-            this.instanceAdapterClass = gen.createAdapterClassLoader().generateClass(commonLoader);
+            final JavaAdapterClassLoader jacl = gen.createAdapterClassLoader();
+            this.instanceAdapterClass = jacl.generateClass(commonLoader);
+            // loaded Class - no need to keep class bytes around
+            jacl.clearClassBytes();
             this.adapterGenerator = new JavaAdapterBytecodeGenerator(superClass, interfaces, commonLoader, true).createAdapterClassLoader();
             this.adaptationResult = AdaptationResult.SUCCESSFUL_RESULT;
         }

nashorn/test/script/basic/JDK-8020357.js

@@ -33,17 +33,6 @@ var BYTES_PER_INT_32  =  4
 
 var limit = Math.pow(2, UNSIGNED_INT_BITS)/BYTES_PER_INT_32
 
-try {
-    // A value at or under the limit should either succeed if we have
-    // enough heap, or throw an OutOfMemoryError if we don't.
-    Int32Array(limit - 1)
-} catch(e) {
-    if(!(e instanceof java.lang.OutOfMemoryError)) {
-        // Only print an unexpected result; OutOfMemoryError is expected
-        print(e)
-    }
-}
-
 // A value over the limit should throw a RangeError.
 try {
     Int32Array(limit)

nashorn/test/src/jdk/nashorn/api/javaaccess/BooleanAccessTest.java

@@ -33,6 +33,7 @@ import javax.script.ScriptEngine;
 import javax.script.ScriptEngineManager;
 import javax.script.ScriptException;
 import org.testng.TestNG;
+import org.testng.annotations.AfterClass;
 import org.testng.annotations.BeforeClass;
 import org.testng.annotations.Test;
 
@@ -44,7 +45,7 @@ import org.testng.annotations.Test;
 public class BooleanAccessTest {
 
     private static ScriptEngine e = null;
-    private static SharedObject o = new SharedObject();
+    private static SharedObject o = null;
 
     public static void main(final String[] args) {
         TestNG.main(args);
@@ -54,10 +55,17 @@ public class BooleanAccessTest {
     public static void setUpClass() throws ScriptException {
         final ScriptEngineManager m = new ScriptEngineManager();
         e = m.getEngineByName("nashorn");
+        o = new SharedObject();
         e.put("o", o);
         e.eval("var SharedObject = Packages.jdk.nashorn.api.javaaccess.SharedObject;");
     }
 
+    @AfterClass
+    public static void tearDownClass() {
+        e = null;
+        o = null;
+    }
+
     @Test
     public void accessFieldBoolean() throws ScriptException {
         e.eval("var p_boolean = o.publicBoolean;");

nashorn/test/src/jdk/nashorn/api/javaaccess/MethodAccessTest.java

@@ -36,6 +36,7 @@ import javax.script.ScriptEngine;
 import javax.script.ScriptEngineManager;
 import javax.script.ScriptException;
 import org.testng.TestNG;
+import org.testng.annotations.AfterClass;
 import org.testng.annotations.BeforeClass;
 import org.testng.annotations.Test;
 
@@ -47,7 +48,7 @@ import org.testng.annotations.Test;
 public class MethodAccessTest {
 
     private static ScriptEngine e = null;
-    private static SharedObject o = new SharedObject();
+    private static SharedObject o = null;
 
     public static void main(final String[] args) {
         TestNG.main(args);
@@ -57,12 +58,19 @@ public class MethodAccessTest {
     public static void setUpClass() throws ScriptException {
         final ScriptEngineManager m = new ScriptEngineManager();
         e = m.getEngineByName("nashorn");
+        o = new SharedObject();
         o.setEngine(e);
         e.put("o", o);
         e.eval("var SharedObject = Packages.jdk.nashorn.api.javaaccess.SharedObject;");
         e.eval("var Person = Packages.jdk.nashorn.api.javaaccess.Person;");
     }
 
+    @AfterClass
+    public static void tearDownClass() {
+        e = null;
+        o = null;
+    }
+
     @Test
     public void accessMethodthrowsCheckedException() throws ScriptException {
         e.eval("try {" +

nashorn/test/src/jdk/nashorn/api/javaaccess/NumberAccessTest.java

@@ -33,6 +33,7 @@ import javax.script.ScriptEngine;
 import javax.script.ScriptEngineManager;
 import javax.script.ScriptException;
 import org.testng.TestNG;
+import org.testng.annotations.AfterClass;
 import org.testng.annotations.BeforeClass;
 import org.testng.annotations.Test;
 
@@ -44,7 +45,7 @@ import org.testng.annotations.Test;
 public class NumberAccessTest {
 
     private static ScriptEngine e = null;
-    private static SharedObject o = new SharedObject();
+    private static SharedObject o = null;
 
     public static void main(final String[] args) {
         TestNG.main(args);
@@ -54,10 +55,17 @@ public class NumberAccessTest {
     public static void setUpClass() throws ScriptException {
         final ScriptEngineManager m = new ScriptEngineManager();
         e = m.getEngineByName("nashorn");
+        o = new SharedObject();
         e.put("o", o);
         e.eval("var SharedObject = Packages.jdk.nashorn.api.javaaccess.SharedObject;");
     }
 
+    @AfterClass
+    public static void tearDownClass() {
+        e = null;
+        o = null;
+    }
+
     // --------------------------------long
     // tests------------------------------------
     @Test

nashorn/test/src/jdk/nashorn/api/javaaccess/NumberBoxingTest.java

@@ -32,6 +32,7 @@ import javax.script.ScriptEngine;
 import javax.script.ScriptEngineManager;
 import javax.script.ScriptException;
 import org.testng.TestNG;
+import org.testng.annotations.AfterClass;
 import org.testng.annotations.BeforeClass;
 import org.testng.annotations.Test;
 
@@ -43,7 +44,7 @@ import org.testng.annotations.Test;
 public class NumberBoxingTest {
 
     private static ScriptEngine e = null;
-    private static SharedObject o = new SharedObject();
+    private static SharedObject o = null;
 
     public static void main(final String[] args) {
         TestNG.main(args);
@@ -53,10 +54,17 @@ public class NumberBoxingTest {
     public static void setUpClass() throws ScriptException {
         final ScriptEngineManager m = new ScriptEngineManager();
         e = m.getEngineByName("nashorn");
+        o = new SharedObject();
         e.put("o", o);
         e.eval("var SharedObject = Packages.jdk.nashorn.api.javaaccess.SharedObject;");
     }
 
+    @AfterClass
+    public static void tearDownClass() {
+        e = null;
+        o = null;
+    }
+
     // --------------------------------long
     // tests------------------------------------
     @Test

nashorn/test/src/jdk/nashorn/api/javaaccess/ObjectAccessTest.java

@@ -32,6 +32,7 @@ import javax.script.ScriptEngine;
 import javax.script.ScriptEngineManager;
 import javax.script.ScriptException;
 import org.testng.TestNG;
+import org.testng.annotations.AfterClass;
 import org.testng.annotations.BeforeClass;
 import org.testng.annotations.Test;
 
@@ -43,7 +44,7 @@ import org.testng.annotations.Test;
 public class ObjectAccessTest {
 
     private static ScriptEngine e = null;
-    private static SharedObject o = new SharedObject();
+    private static SharedObject o = null;
 
     public static void main(final String[] args) {
         TestNG.main(args);
@@ -53,11 +54,18 @@ public class ObjectAccessTest {
     public static void setUpClass() throws ScriptException {
         final ScriptEngineManager m = new ScriptEngineManager();
         e = m.getEngineByName("nashorn");
+        o = new SharedObject();
         e.put("o", o);
         e.eval("var SharedObject = Packages.jdk.nashorn.api.javaaccess.SharedObject;");
         e.eval("var Person = Packages.jdk.nashorn.api.javaaccess.Person;");
     }
 
+    @AfterClass
+    public static void tearDownClass() {
+        e = null;
+        o = null;
+    }
+
     @Test
     public void accessFieldObject() throws ScriptException {
         e.eval("var p_object = o.publicObject;");

nashorn/test/src/jdk/nashorn/api/javaaccess/StringAccessTest.java

@@ -32,6 +32,7 @@ import javax.script.ScriptEngine;
 import javax.script.ScriptEngineManager;
 import javax.script.ScriptException;
 import org.testng.TestNG;
+import org.testng.annotations.AfterClass;
 import org.testng.annotations.BeforeClass;
 import org.testng.annotations.Test;
 
@@ -43,7 +44,7 @@ import org.testng.annotations.Test;
 public class StringAccessTest {
 
     private static ScriptEngine e = null;
-    private static SharedObject o = new SharedObject();
+    private static SharedObject o = null;
 
     public static void main(final String[] args) {
         TestNG.main(args);
@@ -53,10 +54,17 @@ public class StringAccessTest {
     public static void setUpClass() throws ScriptException {
         final ScriptEngineManager m = new ScriptEngineManager();
         e = m.getEngineByName("nashorn");
+        o = new SharedObject();
         e.put("o", o);
         e.eval("var SharedObject = Packages.jdk.nashorn.api.javaaccess.SharedObject;");
     }
 
+    @AfterClass
+    public static void tearDownClass() {
+        e = null;
+        o = null;
+    }
+
     @Test
     public void accessFieldString() throws ScriptException {
         e.eval("var p_string = o.publicString;");

nashorn/test/src/jdk/nashorn/internal/codegen/CompilerTest.java

@@ -35,6 +35,8 @@ import jdk.nashorn.internal.runtime.ScriptObject;
 import jdk.nashorn.internal.runtime.Source;
 import jdk.nashorn.internal.runtime.options.Options;
 import org.testng.Assert;
+import org.testng.annotations.AfterClass;
+import org.testng.annotations.BeforeClass;
 import org.testng.annotations.Test;
 
 /**
@@ -58,7 +60,8 @@ public class CompilerTest {
     private Context context;
     private ScriptObject global;
 
-    public CompilerTest() {
+    @BeforeClass
+    public void setupTest() {
         final Options options = new Options("nashorn");
         options.set("anon.functions", true);
         options.set("compile.only", true);
@@ -79,6 +82,12 @@ public class CompilerTest {
         this.global = context.createGlobal();
     }
 
+    @AfterClass
+    public void tearDownTest() {
+        this.context = null;
+        this.global = null;
+    }
+
     @Test
     public void compileAllTests() {
         if (TEST262) {

nashorn/test/src/jdk/nashorn/internal/parser/ParserTest.java

@@ -28,10 +28,11 @@ package jdk.nashorn.internal.parser;
 import java.io.File;
 import jdk.nashorn.internal.runtime.Context;
 import jdk.nashorn.internal.runtime.ErrorManager;
-import jdk.nashorn.internal.runtime.ScriptObject;
 import jdk.nashorn.internal.runtime.Source;
 import jdk.nashorn.internal.runtime.options.Options;
 import org.testng.Assert;
+import org.testng.annotations.AfterClass;
+import org.testng.annotations.BeforeClass;
 import org.testng.annotations.Test;
 
 /**
@@ -54,9 +55,9 @@ public class ParserTest {
     }
 
     private Context context;
-    private ScriptObject global;
 
-    public ParserTest() {
+    @BeforeClass
+    public void setupTest() {
         final Options options = new Options("nashorn");
         options.set("anon.functions", true);
         options.set("parse.only", true);
@@ -64,7 +65,11 @@ public class ParserTest {
 
         ErrorManager errors = new ErrorManager();
         this.context = new Context(options, errors, Thread.currentThread().getContextClassLoader());
-        this.global = context.createGlobal();
+    }
+
+    @AfterClass
+    public void tearDownTest() {
+        this.context = null;
     }
 
     @Test
@@ -125,8 +130,6 @@ public class ParserTest {
             log("Begin parsing " + file.getAbsolutePath());
         }
 
-        final ScriptObject oldGlobal = Context.getGlobal();
-        final boolean globalChanged = (oldGlobal != global);
         try {
             final char[] buffer = Source.readFully(file);
             boolean excluded = false;
@@ -150,9 +153,6 @@ public class ParserTest {
                 }
             };
             errors.setLimit(0);
-            if (globalChanged) {
-                Context.setGlobal(global);
-            }
             final Source   source   = new Source(file.getAbsolutePath(), buffer);
             new Parser(context.getEnv(), source, errors).parse();
             if (errors.getNumberOfErrors() > 0) {
@@ -167,10 +167,6 @@ public class ParserTest {
                 exp.printStackTrace(System.out);
             }
             failed++;
-        } finally {
-            if (globalChanged) {
-                Context.setGlobal(oldGlobal);
-            }
         }
 
         if (VERBOSE) {