jdk8-mips64-public/nashorn: src/jdk/nashorn/internal/runtime/FindProperty.java@43e32b36153c (annotated)

src/jdk/nashorn/internal/runtime/FindProperty.java@43e32b36153c (annotated)

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

Thu, 14 Feb 2013 13:01:52 +0100

author: lagergren
date: Thu, 14 Feb 2013 13:01:52 +0100
changeset 89: 43e32b36153c
parent 80: 8742be332c8a
child 96: e478708faa22
permissions: -rw-r--r--

8008199: Lazy compilation and trampoline implementation
Summary: The code pipeline now supports lazy compilation, which can be used to only compile certain FunctionNodes and leave others be, saving startup time. When these uncompiled nodes are hit, a trampoline will force them to be recompiled. This can also be used to specialize compilation fixing parameter types and return types to a callsite specific compilation. This will give performance.
Reviewed-by: attila, sundar

 /*
  * 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.runtime;
 import static jdk.nashorn.internal.runtime.linker.Lookup.MH;
 import java.lang.invoke.MethodHandle;
 import jdk.nashorn.internal.codegen.objects.ObjectClassGenerator;
 /**
  * This class represents the result from a find property search.
  */
 public final class FindProperty {
     /** Object where search began. */
     private final ScriptObject self;
     /** Object where search finish. */
     private final ScriptObject prototype;
     /** Found property. */
     private final Property     property;
     /**
      * Constructor
      *
      * @param self      script object where search began
      * @param prototype prototype where property was found, may be {@code self} if not inherited
      * @param property  property that was search result
      */
     public FindProperty(final ScriptObject self, final ScriptObject prototype, final Property property) {
         this.self      = self;
         this.prototype = prototype;
         this.property  = property;
     }
     /**
      * Ask for a getter that returns the given type. The type has nothing to do with the
      * internal representation of the property. It may be an Object (boxing primitives) or
      * a primitive (primitive fields with -Dnashorn.fields.dual=true)
      * @see ObjectClassGenerator
      *
      * @param type type of getter, e.g. int.class if we want a function with {@code get()I} signature
      * @return method handle for the getter
      */
     public MethodHandle getGetter(final Class<?> type) {
         MethodHandle getter = property.getGetter(type);
         if (property instanceof UserAccessorProperty) {
             final UserAccessorProperty uc = (UserAccessorProperty)property;
             getter = MH.insertArguments(getter, 0, isInherited() ? getOwner() : null, uc.getGetterSlot());
         }
         return getter;
     }
     /**
      * Ask for a setter that sets the given type. The type has nothing to do with the
      * internal representation of the property. It may be an Object (boxing primitives) or
      * a primitive (primitive fields with -Dnashorn.fields.dual=true)
      * @see ObjectClassGenerator
      *
      * @param type type of setter, e.g. int.class if we want a function with {@code set(I)V} signature
      * @param strict are we in strict mode
      *
      * @return method handle for the getter
      */
     public MethodHandle getSetter(final Class<?> type, final boolean strict) {
         MethodHandle setter = property.getSetter(type, getOwner().getMap());
         if (property instanceof UserAccessorProperty) {
             final UserAccessorProperty uc = (UserAccessorProperty) property;
             setter = MH.insertArguments(setter, 0, (isInherited() ? getOwner() : null),
                     uc.getSetterSlot(), strict? property.getKey() : null);
         }
         return setter;
     }
     /**
      * Return the {@code ScriptObject} owning of the property:  this means the prototype.
      * @return owner of property
      */
     public ScriptObject getOwner() {
         return prototype;
     }
     /**
      * Return the property that was found
      * @return property
      */
     public Property getProperty() {
         return property;
     }
     /**
      * Check if the property found was inherited, i.e. not directly in the self
      * @return true if inherited property
      */
     public boolean isInherited() {
         return self != prototype;
     }
     /**
      * Check if the property found was NOT inherited, i.e. defined in the script
      * object, rather than in the prototype
      * @return true if not inherited
      */
     public boolean isSelf() {
         return self == prototype;
     }
     /**
      * Check if the property is in the scope
      * @return true if on scope
      */
     public boolean isScope() {
         return prototype.isScope();
     }
 }

Mercurial > jdk8-mips64-public > nashorn / annotate

src/jdk/nashorn/internal/runtime/FindProperty.java@43e32b36153c (annotated)

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