Wrap JSFunction bindings in a helper object

src/objects.cc

 // Copyright 2013 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 "src/objects.h"
 
 #include <cmath>
 #include <iomanip>
 #include <sstream>
 
@@ skipping 8777 matching lines @@
                                          int number_of_literals,
                                          PretenureFlag pretenure) {
   Handle<FixedArray> literals = isolate->factory()->NewFixedArray(
       number_of_literals + kFirstLiteralIndex, pretenure);
   Handle<LiteralsArray> casted_literals = Handle<LiteralsArray>::cast(literals);
   casted_literals->set_feedback_vector(*vector);
   return casted_literals;
 }
 
 
+// static
+Handle<BindingsArray> BindingsArray::New(Isolate* isolate,
+                                         Handle<TypeFeedbackVector> vector,
+                                         Handle<JSReceiver> bound_function,
+                                         Handle<Object> bound_this,
+                                         int number_of_bindings) {
+  Handle<FixedArray> bindings = isolate->factory()->NewFixedArray(
+      number_of_bindings + kFirstBindingIndex);
+  Handle<BindingsArray> casted_bindings = Handle<BindingsArray>::cast(bindings);
+  casted_bindings->set_feedback_vector(*vector);
+  casted_bindings->set_bound_function(*bound_function);
+  casted_bindings->set_bound_this(*bound_this);
+  return casted_bindings;
+}
+
+
+// static
+Handle<JSArray> BindingsArray::CreateBoundArguments(
+    Handle<BindingsArray> bindings) {
+  int bound_argument_count = bindings->bindings_count();
+  Factory* factory = bindings->GetIsolate()->factory();
+  Handle<FixedArray> arguments = factory->NewFixedArray(bound_argument_count);
+  bindings->CopyTo(kFirstBindingIndex, *arguments, 0, bound_argument_count);
+  return factory->NewJSArrayWithElements(arguments);
+}
+
+
+// static
+Handle<JSArray> BindingsArray::CreateRuntimeBindings(
+    Handle<BindingsArray> bindings) {
+  Factory* factory = bindings->GetIsolate()->factory();
+  // A runtime bindings array consists of
+  // [bound function, bound this, [arg0, arg1, ...]].
+  Handle<FixedArray> runtime_bindings =
+      factory->NewFixedArray(2 + bindings->bindings_count());
+  bindings->CopyTo(kBoundFunctionIndex, *runtime_bindings, 0,
+                   2 + bindings->bindings_count());
+  return factory->NewJSArrayWithElements(runtime_bindings);
+}
+
+
 int HandlerTable::LookupRange(int pc_offset, int* stack_depth_out,
                               CatchPrediction* prediction_out) {
   int innermost_handler = -1, innermost_start = -1;
   for (int i = 0; i < length(); i += kRangeEntrySize) {
     int start_offset = Smi::cast(get(i + kRangeStartIndex))->value();
     int end_offset = Smi::cast(get(i + kRangeEndIndex))->value();
     int handler_field = Smi::cast(get(i + kRangeHandlerIndex))->value();
     int handler_offset = HandlerOffsetField::decode(handler_field);
     CatchPrediction prediction = HandlerPredictionField::decode(handler_field);
     int stack_depth = Smi::cast(get(i + kRangeDepthIndex))->value();
@@ skipping 7993 matching lines @@
   if (cell->value() != *new_value) {
     cell->set_value(*new_value);
     Isolate* isolate = cell->GetIsolate();
     cell->dependent_code()->DeoptimizeDependentCodeGroup(
         isolate, DependentCode::kPropertyCellChangedGroup);
   }
 }
 
 }  // namespace internal
 }  // namespace v8