Make 'name' property on functions configurable.

src/bootstrapper.cc

 // Copyright 2014 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.
 
 #include "bootstrapper.h"
 
 #include "accessors.h"
 #include "isolate-inl.h"
 #include "natives.h"
 #include "snapshot.h"
@@ skipping 368 matching lines @@
   function->shared()->set_native(true);
   return function;
 }
 
 
 void Genesis::SetFunctionInstanceDescriptor(
     Handle<Map> map, PrototypePropertyMode prototypeMode) {
   int size = (prototypeMode == DONT_ADD_PROTOTYPE) ? 4 : 5;
   Map::EnsureDescriptorSlack(map, size);
 
-  PropertyAttributes attribs = static_cast<PropertyAttributes>(
-      DONT_ENUM | DONT_DELETE | READ_ONLY);
+  PropertyAttributes ro_attribs =
+      static_cast<PropertyAttributes>(DONT_ENUM | DONT_DELETE | READ_ONLY);
+  PropertyAttributes roc_attribs =
+      static_cast<PropertyAttributes>(DONT_ENUM | READ_ONLY);
 
   Handle<AccessorInfo> length =
-      Accessors::FunctionLengthInfo(isolate(), attribs);
+      Accessors::FunctionLengthInfo(isolate(), ro_attribs);
   {  // Add length.
     CallbacksDescriptor d(Handle<Name>(Name::cast(length->name())),
-                          length, attribs);
+                          length, ro_attribs);
     map->AppendDescriptor(&d);
   }
   Handle<AccessorInfo> name =
-      Accessors::FunctionNameInfo(isolate(), attribs);
+      Accessors::FunctionNameInfo(isolate(), roc_attribs);
   {  // Add name.
     CallbacksDescriptor d(Handle<Name>(Name::cast(name->name())),
-                          name, attribs);
+                          name, roc_attribs);
     map->AppendDescriptor(&d);
   }
   Handle<AccessorInfo> args =
-      Accessors::FunctionArgumentsInfo(isolate(), attribs);
+      Accessors::FunctionArgumentsInfo(isolate(), ro_attribs);
   {  // Add arguments.
     CallbacksDescriptor d(Handle<Name>(Name::cast(args->name())),
-                          args, attribs);
+                          args, ro_attribs);
     map->AppendDescriptor(&d);
   }
   Handle<AccessorInfo> caller =
-      Accessors::FunctionCallerInfo(isolate(), attribs);
+      Accessors::FunctionCallerInfo(isolate(), ro_attribs);
   {  // Add caller.
     CallbacksDescriptor d(Handle<Name>(Name::cast(caller->name())),
-                          caller, attribs);
+                          caller, ro_attribs);
     map->AppendDescriptor(&d);
   }
   if (prototypeMode != DONT_ADD_PROTOTYPE) {
     if (prototypeMode == ADD_WRITEABLE_PROTOTYPE) {
-      attribs = static_cast<PropertyAttributes>(attribs & ~READ_ONLY);
+      ro_attribs = static_cast<PropertyAttributes>(ro_attribs & ~READ_ONLY);
     }
     Handle<AccessorInfo> prototype =
-        Accessors::FunctionPrototypeInfo(isolate(), attribs);
+        Accessors::FunctionPrototypeInfo(isolate(), ro_attribs);
     CallbacksDescriptor d(Handle<Name>(Name::cast(prototype->name())),
-                          prototype, attribs);
+                          prototype, ro_attribs);
     map->AppendDescriptor(&d);
   }
 }
 
 
 Handle<Map> Genesis::CreateFunctionMap(PrototypePropertyMode prototype_mode) {
   Handle<Map> map = factory()->NewMap(JS_FUNCTION_TYPE, JSFunction::kSize);
   SetFunctionInstanceDescriptor(map, prototype_mode);
   map->set_function_with_prototype(prototype_mode != DONT_ADD_PROTOTYPE);
   return map;
@@ skipping 88 matching lines @@
     Handle<Map> map, PrototypePropertyMode prototypeMode) {
   int size = (prototypeMode == DONT_ADD_PROTOTYPE) ? 4 : 5;
   Map::EnsureDescriptorSlack(map, size);
 
   Handle<AccessorPair> arguments(factory()->NewAccessorPair());
   Handle<AccessorPair> caller(factory()->NewAccessorPair());
   PropertyAttributes rw_attribs =
       static_cast<PropertyAttributes>(DONT_ENUM | DONT_DELETE);
   PropertyAttributes ro_attribs =
       static_cast<PropertyAttributes>(DONT_ENUM | DONT_DELETE | READ_ONLY);
+  PropertyAttributes roc_attribs =
+      static_cast<PropertyAttributes>(DONT_ENUM | READ_ONLY);
 
   Handle<AccessorInfo> length =
       Accessors::FunctionLengthInfo(isolate(), ro_attribs);
   {  // Add length.
     CallbacksDescriptor d(Handle<Name>(Name::cast(length->name())),
                           length, ro_attribs);
     map->AppendDescriptor(&d);
   }
   Handle<AccessorInfo> name =
-      Accessors::FunctionNameInfo(isolate(), ro_attribs);
+      Accessors::FunctionNameInfo(isolate(), roc_attribs);
   {  // Add name.
     CallbacksDescriptor d(Handle<Name>(Name::cast(name->name())),
-                          name, ro_attribs);
+                          name, roc_attribs);
     map->AppendDescriptor(&d);
   }
   {  // Add arguments.
     CallbacksDescriptor d(factory()->arguments_string(), arguments,
                           rw_attribs);
     map->AppendDescriptor(&d);
   }
   {  // Add caller.
     CallbacksDescriptor d(factory()->caller_string(), caller, rw_attribs);
     map->AppendDescriptor(&d);
@@ skipping 2142 matching lines @@
   return from + sizeof(NestingCounterType);
 }
 
 
 // Called when the top-level V8 mutex is destroyed.
 void Bootstrapper::FreeThreadResources() {
   ASSERT(!IsActive());
 }
 
 } }  // namespace v8::internal