Mercurial > jdk8-mips64-public > nashorn / file revision

 /*

  * 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.

  */

 package jdk.nashorn.internal.objects;

 import static jdk.nashorn.internal.runtime.ScriptRuntime.UNDEFINED;

 import java.io.PrintWriter;

 import java.util.Objects;

 import jdk.nashorn.internal.objects.annotations.Attribute;

 import jdk.nashorn.internal.objects.annotations.Function;

 import jdk.nashorn.internal.objects.annotations.ScriptClass;

 import jdk.nashorn.internal.objects.annotations.Where;

 import jdk.nashorn.internal.runtime.Context;

 import jdk.nashorn.internal.runtime.PropertyListenerManager;

 import jdk.nashorn.internal.runtime.PropertyMap;

 import jdk.nashorn.internal.runtime.ScriptFunction;

 import jdk.nashorn.internal.runtime.ScriptObject;

 import jdk.nashorn.internal.runtime.linker.LinkerCallSite;

 /**

  * Nashorn specific debug utils. This is meant for Nashorn developers.

  * The interface is subject to change without notice!!

  *

  */

 @ScriptClass("Debug")

 public final class NativeDebug extends ScriptObject {

     NativeDebug() {

         this.setProto(Global.objectPrototype());

     }

     @Override

     public String getClassName() {

         return "Debug";

     }

     /**

      * Nashorn extension: get context, context utility

      *

      * @param self self reference

      * @return context

      */

     @Function(attributes = Attribute.NOT_ENUMERABLE, where = Where.CONSTRUCTOR)

     public static Object getContext(final Object self) {

         final SecurityManager sm = System.getSecurityManager();

         if (sm != null) {

             sm.checkPermission(new RuntimePermission("nashorn.getContext"));

         }

         return Global.getThisContext();

     }

     /**

      * Nashorn extension: get map from {@link ScriptObject}

      *

      * @param self self reference

      * @param obj script object

      * @return the map for the current ScriptObject

      */

     @Function(attributes = Attribute.NOT_ENUMERABLE, where = Where.CONSTRUCTOR)

     public static Object map(final Object self, final Object obj) {

         if (obj instanceof ScriptObject) {

             return ((ScriptObject)obj).getMap();

         }

         return UNDEFINED;

     }

     /**

      * Nashorn extension: get spill vector from {@link ScriptObject}

      *

      * @param self self reference

      * @param obj script object

      * @return the spill vector for the given ScriptObject

      */

     @Function(attributes = Attribute.NOT_ENUMERABLE, where = Where.CONSTRUCTOR)

     public static Object spill(final Object self, final Object obj) {

         if (obj instanceof ScriptObject) {

             return ((ScriptObject)obj).spill;

         }

         return UNDEFINED;

     }

     /**

      * Check object identity comparison regardless of type

      *

      * @param self self reference

      * @param obj1 first object in comparison

      * @param obj2 second object in comparison

      * @return true if reference identity

      */

     @Function(attributes = Attribute.NOT_ENUMERABLE, where = Where.CONSTRUCTOR)

     public static Object identical(final Object self, final Object obj1, final Object obj2) {

         return obj1 == obj2;

     }

     /**

      * Object util - getClass

      *

      * @param self self reference

      * @param obj  object

      * @return class of {@code obj}

      */

     @Function(attributes = Attribute.NOT_ENUMERABLE, where = Where.CONSTRUCTOR)

     public static Object getClass(final Object self, final Object obj) {

         if (obj != null) {

             return obj.getClass();

         }

         return UNDEFINED;

     }

     /**

      * Object util - equals

      *

      * @param self self reference

      * @param obj1 first object in comparison

      * @param obj2 second object in comparison

      * @return return {@link Object#equals(Object)} for objects.

      */

     @Function(attributes = Attribute.NOT_ENUMERABLE, where = Where.CONSTRUCTOR)

     public static Object equals(final Object self, final Object obj1, final Object obj2) {

         return (obj1 != null) ? obj1.equals(obj2) : false;

     }

     /**

      * Object util - toJavaString

      *

      * @param self self reference

      * @param obj  object to represent as a string

      * @return Java string representation of {@code obj}

      */

     @Function(attributes = Attribute.NOT_ENUMERABLE, where = Where.CONSTRUCTOR)

     public static Object toJavaString(final Object self, final Object obj) {

         return Objects.toString(obj);

     }

     /**

      * Do not call overridden toString -- use default toString impl

      *

      * @param self self reference

      * @param obj  object to represent as a string

      * @return string representation

      */

     @Function(attributes = Attribute.NOT_ENUMERABLE, where = Where.CONSTRUCTOR)

     public static Object toIdentString(final Object self, final Object obj) {

         if (obj == null) {

             return "null";

         }

         final int hash = System.identityHashCode(obj);

         return obj.getClass() + "@" + Integer.toHexString(hash);

     }

     /**

      * Dump all Nashorn debug mode counters. Calling this may be better if

      * you want to print all counters. This way you can avoid too many callsites

      * due to counter access itself!!

      * @param self self reference

      * @return undefined

      */

     @SuppressWarnings("resource")

     @Function(attributes = Attribute.NOT_ENUMERABLE, where = Where.CONSTRUCTOR)

     public static Object dumpCounters(final Object self) {

         final PrintWriter out = Context.getCurrentErr();

         out.println("ScriptObject count " + ScriptObject.getCount());

         out.println("Scope count " + ScriptObject.getScopeCount());

         out.println("ScriptObject listeners added " + PropertyListenerManager.getListenersAdded());

         out.println("ScriptObject listeners removed " + PropertyListenerManager.getListenersRemoved());

         out.println("ScriptFunction count " + ScriptObject.getCount());

         out.println("ScriptFunction invokes " + ScriptFunction.getInvokes());

         out.println("ScriptFunction allocations " + ScriptFunction.getAllocations());

         out.println("PropertyMap count " + PropertyMap.getCount());

         out.println("PropertyMap cloned " + PropertyMap.getClonedCount());

         out.println("PropertyMap history hit " + PropertyMap.getHistoryHit());

         out.println("PropertyMap proto invalidations " + PropertyMap.getProtoInvalidations());

         out.println("PropertyMap proto history hit " + PropertyMap.getProtoHistoryHit());

         out.println("PropertyMap setProtoNewMapCount " + PropertyMap.getSetProtoNewMapCount());

         out.println("Callsite count " + LinkerCallSite.getCount());

         out.println("Callsite misses " + LinkerCallSite.getMissCount());

         out.println("Callsite misses by site at " + LinkerCallSite.getMissSamplingPercentage() + "%");

         LinkerCallSite.getMissCounts(out);

         return UNDEFINED;

     }

 }