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/*
* 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 {
// initialized by nasgen
@SuppressWarnings("unused")
private static PropertyMap $nasgenmap$;
private NativeDebug() {
// don't create me!
throw new UnsupportedOperationException();
}
@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 Objects.equals(obj1, obj2);
}
/**
* 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);
}
/**
* Returns the property listener count for a script object
*
* @param self self reference
* @param obj script object whose listener count is returned
* @return listener count
*/
@Function(attributes = Attribute.NOT_ENUMERABLE, where = Where.CONSTRUCTOR)
public static Object getListenerCount(final Object self, final Object obj) {
return (obj instanceof ScriptObject)? ((ScriptObject)obj).getListenerCount() : 0;
}
/**
* 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 constructor calls " + ScriptFunction.getConstructorCount());
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 shared " + PropertyMap.getSharedCount());
out.println("PropertyMap duplicated " + PropertyMap.getDuplicatedCount());
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;
}
}
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