[runtime] support new Proxy() instead of Proxy.create and install getPrototypeOf trap

src/objects.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_OBJECTS_H_
 #define V8_OBJECTS_H_
 
 #include <iosfwd>
 
 #include "src/allocation.h"
@@ skipping 1288 matching lines @@
 
   MUST_USE_RESULT static inline MaybeHandle<Object> GetElement(
       Isolate* isolate, Handle<Object> object, uint32_t index,
       LanguageMode language_mode = SLOPPY);
 
   MUST_USE_RESULT static inline MaybeHandle<Object> SetElement(
       Isolate* isolate, Handle<Object> object, uint32_t index,
       Handle<Object> value, LanguageMode language_mode);
 
   // Get the first non-hidden prototype.
-  static inline Handle<Object> GetPrototype(Isolate* isolate,
-                                            Handle<Object> receiver);
+  static inline MaybeHandle<Object> GetPrototype(Isolate* isolate,
+                                                 Handle<Object> receiver);
 
   bool HasInPrototypeChain(Isolate* isolate, Object* object);
 
   // Returns the permanent hash code associated with this object. May return
   // undefined if not yet created.
   Object* GetHash();
 
   // Returns undefined for JSObjects, but returns the hash code for simple
   // objects.  This avoids a double lookup in the cases where we know we will
   // add the hash to the JSObject if it does not already exist.
@@ skipping 589 matching lines @@
                                        Handle<Object> key,
                                        PropertyDescriptor* desc);
   static bool GetOwnPropertyDescriptor(LookupIterator* it,
                                        PropertyDescriptor* desc);
 
   // Disallow further properties to be added to the object.  This is
   // ES6's [[PreventExtensions]] when passed DONT_THROW.
   MUST_USE_RESULT static Maybe<bool> PreventExtensions(
       Handle<JSReceiver> object, ShouldThrow should_throw);
 
+  MUST_USE_RESULT static Maybe<bool> IsExtensible(Handle<JSReceiver> object);
+
   // Tests for the fast common case for property enumeration.
   bool IsSimpleEnum();
 
   // Returns the class name ([[Class]] property in the specification).
   String* class_name();
 
   // Returns the constructor name (the name (possibly, inferred name) of the
   // function that was used to instantiate the object).
   String* constructor_name();
 
@@ skipping 7628 matching lines @@
   typedef FixedBodyDescriptor<kValueOffset, kSize, kSize> BodyDescriptor;
 
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(WeakCell);
 };
 
 
 // The JSProxy describes EcmaScript Harmony proxies
 class JSProxy: public JSReceiver {
  public:
+  // [handler]: The handler property.
+  DECL_ACCESSORS(handler, Object)
   // [target]: The target property.
   DECL_ACCESSORS(target, Object)
-
-  // [handler]: The handler property.
-  DECL_ACCESSORS(handler, Object)
-
   // [hash]: The hash code property (undefined if not initialized yet).
   DECL_ACCESSORS(hash, Object)
 
+  inline bool has_handler();
+
   DECLARE_CAST(JSProxy)
 
+  static MaybeHandle<Object> GetPrototype(Handle<JSProxy> receiver);
+
   MUST_USE_RESULT static MaybeHandle<Object> GetPropertyWithHandler(
       Handle<JSProxy> proxy,
       Handle<Object> receiver,
       Handle<Name> name);
 
   // If the handler defines an accessor property with a setter, invoke it.
   // If it defines an accessor property without a setter, or a data property
   // that is read-only, fail.  In all these cases set '*done' to true.
   // Otherwise set it to false, in which case the return value is not
   // meaningful.
@@ skipping 17 matching lines @@
   // Layout description. We add padding so that a proxy has the same
   // size as a virgin JSObject. This is essential for becoming a JSObject
   // upon freeze.
   static const int kTargetOffset = HeapObject::kHeaderSize;
   static const int kHandlerOffset = kTargetOffset + kPointerSize;
   static const int kHashOffset = kHandlerOffset + kPointerSize;
   static const int kSize = kHashOffset + kPointerSize;
 
   typedef FixedBodyDescriptor<kTargetOffset, kSize, kSize> BodyDescriptor;
 
+  MUST_USE_RESULT Object* GetIdentityHash();
+
+  static Handle<Smi> GetOrCreateIdentityHash(Handle<JSProxy> proxy);
+
  private:
   friend class JSReceiver;
 
   // Invoke a trap by name. If the trap does not exist on this's handler,
   // but derived_trap is non-NULL, invoke that instead.  May cause GC.
   MUST_USE_RESULT static MaybeHandle<Object> CallTrap(
       Handle<JSProxy> proxy, const char* name, Handle<Object> derived_trap,
       int argc, Handle<Object> args[]);
 
   MUST_USE_RESULT static Maybe<bool> HasPropertyWithHandler(
       Handle<JSProxy> proxy, Handle<Name> name);
 
   MUST_USE_RESULT static MaybeHandle<Object> DeletePropertyWithHandler(
       Handle<JSProxy> proxy, Handle<Name> name, LanguageMode language_mode);
 
-  MUST_USE_RESULT Object* GetIdentityHash();
-
-  static Handle<Smi> GetOrCreateIdentityHash(Handle<JSProxy> proxy);
-
   DISALLOW_IMPLICIT_CONSTRUCTORS(JSProxy);
 };
 
 
 class JSFunctionProxy: public JSProxy {
  public:
   // [call_trap]: The call trap.
   DECL_ACCESSORS(call_trap, JSReceiver)
 
   // [construct_trap]: The construct trap.
@@ skipping 1125 matching lines @@
     }
     return value;
   }
 };
 
 
 }  // NOLINT, false-positive due to second-order macros.
 }  // NOLINT, false-positive due to second-order macros.
 
 #endif  // V8_OBJECTS_H_