Implement function proxies (except for their use as constructors).

src/execution.cc

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 131 matching lines @@
   }
 
   return Handle<Object>(value->ToObjectUnchecked(), isolate);
 }
 
 
 Handle<Object> Execution::Call(Handle<Object> callable,
                                Handle<Object> receiver,
                                int argc,
                                Object*** args,
-                               bool* pending_exception) {
+                               bool* pending_exception,
+                               bool convert_receiver) {
   if (!callable->IsJSFunction()) {
     callable = TryGetFunctionDelegate(callable, pending_exception);
     if (*pending_exception) return callable;
   }
   Handle<JSFunction> func = Handle<JSFunction>::cast(callable);
+
+  // In non-strict mode, convert receiver.
+  if (convert_receiver && !receiver->IsJSReceiver() &&
+      !func->shared()->native() && !func->shared()->strict_mode()) {
+    if (receiver->IsUndefined() || receiver->IsNull()) {
+      // Careful, func->context()->global()->global_receiver() gives
+      // the JSBuiltinsObject if func is a builtin. Not what we want here.
+      receiver =
+          Handle<Object>(func->GetIsolate()->global()->global_receiver());
+    } else {
+      receiver = ToObject(receiver, pending_exception);
+    }
+    if (*pending_exception) return callable;
+  }
+
   return Invoke(false, func, receiver, argc, args, pending_exception);
 }
 
 
 Handle<Object> Execution::New(Handle<JSFunction> func, int argc,
                               Object*** args, bool* pending_exception) {
   return Invoke(true, func, Isolate::Current()->global(), argc, args,
                 pending_exception);
 }
 
@@ skipping 35 matching lines @@
 
 
 Handle<Object> Execution::GetFunctionDelegate(Handle<Object> object) {
   ASSERT(!object->IsJSFunction());
   Isolate* isolate = Isolate::Current();
   Factory* factory = isolate->factory();
 
   // If you return a function from here, it will be called when an
   // attempt is made to call the given object as a function.
 
+  // If object is a function proxies, get its handler. Iterate if necessary.
+  Object* fun = *object;
+  while (fun->IsJSFunctionProxy()) {
+    fun = JSFunctionProxy::cast(fun)->call_trap();
+  }
+  if (fun->IsJSFunction()) return Handle<Object>(fun);
+
   // Objects created through the API can have an instance-call handler
   // that should be used when calling the object as a function.
-  if (object->IsHeapObject() &&
-      HeapObject::cast(*object)->map()->has_instance_call_handler()) {
+  if (fun->IsHeapObject() &&
+      HeapObject::cast(fun)->map()->has_instance_call_handler()) {
     return Handle<JSFunction>(
         isolate->global_context()->call_as_function_delegate());
   }
 
   return factory->undefined_value();
 }
 
 
 Handle<Object> Execution::TryGetFunctionDelegate(Handle<Object> object,
                                                  bool* has_pending_exception) {
   ASSERT(!object->IsJSFunction());
   Isolate* isolate = Isolate::Current();
 
+  // If object is a function proxies, get its handler. Iterate if necessary.
+  Object* fun = *object;
+  while (fun->IsJSFunctionProxy()) {
+    fun = JSFunctionProxy::cast(fun)->call_trap();
+  }
+  if (fun->IsJSFunction()) return Handle<Object>(fun);
+
   // Objects created through the API can have an instance-call handler
   // that should be used when calling the object as a function.
-  if (object->IsHeapObject() &&
-      HeapObject::cast(*object)->map()->has_instance_call_handler()) {
+  if (fun->IsHeapObject() &&
+      HeapObject::cast(fun)->map()->has_instance_call_handler()) {
     return Handle<JSFunction>(
         isolate->global_context()->call_as_function_delegate());
   }
 
   // If the Object doesn't have an instance-call handler we should
   // throw a non-callable exception.
   i::Handle<i::Object> error_obj = isolate->factory()->NewTypeError(
       "called_non_callable", i::HandleVector<i::Object>(&object, 1));
   isolate->Throw(*error_obj);
   *has_pending_exception = true;
 
   return isolate->factory()->undefined_value();
 }
 
 
 Handle<Object> Execution::GetConstructorDelegate(Handle<Object> object) {
   ASSERT(!object->IsJSFunction());
   Isolate* isolate = Isolate::Current();
 
   // If you return a function from here, it will be called when an
   // attempt is made to call the given object as a constructor.
 
+  // If object is a function proxies, get its handler. Iterate if necessary.
+  Object* fun = *object;
+  while (fun->IsJSFunctionProxy()) {
+    fun = JSFunctionProxy::cast(fun)->call_trap();
+  }
+  if (fun->IsJSFunction()) return Handle<Object>(fun);
+
   // Objects created through the API can have an instance-call handler
   // that should be used when calling the object as a function.
-  if (object->IsHeapObject() &&
-      HeapObject::cast(*object)->map()->has_instance_call_handler()) {
+  if (fun->IsHeapObject() &&
+      HeapObject::cast(fun)->map()->has_instance_call_handler()) {
     return Handle<JSFunction>(
         isolate->global_context()->call_as_constructor_delegate());
   }
 
   return isolate->factory()->undefined_value();
 }
 
 
 Handle<Object> Execution::TryGetConstructorDelegate(
     Handle<Object> object,
     bool* has_pending_exception) {
   ASSERT(!object->IsJSFunction());
   Isolate* isolate = Isolate::Current();
 
   // If you return a function from here, it will be called when an
   // attempt is made to call the given object as a constructor.
 
+  // If object is a function proxies, get its handler. Iterate if necessary.
+  Object* fun = *object;
+  while (fun->IsJSFunctionProxy()) {
+    fun = JSFunctionProxy::cast(fun)->call_trap();
+  }
+  if (fun->IsJSFunction()) return Handle<Object>(fun);
+
   // Objects created through the API can have an instance-call handler
   // that should be used when calling the object as a function.
-  if (object->IsHeapObject() &&
-      HeapObject::cast(*object)->map()->has_instance_call_handler()) {
+  if (fun->IsHeapObject() &&
+      HeapObject::cast(fun)->map()->has_instance_call_handler()) {
     return Handle<JSFunction>(
         isolate->global_context()->call_as_constructor_delegate());
   }
 
   // If the Object doesn't have an instance-call handler we should
   // throw a non-callable exception.
   i::Handle<i::Object> error_obj = isolate->factory()->NewTypeError(
       "called_non_callable", i::HandleVector<i::Object>(&object, 1));
   isolate->Throw(*error_obj);
   *has_pending_exception = true;
@@ skipping 255 matching lines @@
   RETURN_NATIVE_CALL(to_string, 1, { obj.location() }, exc);
 }
 
 
 Handle<Object> Execution::ToDetailString(Handle<Object> obj, bool* exc) {
   RETURN_NATIVE_CALL(to_detail_string, 1, { obj.location() }, exc);
 }
 
 
 Handle<Object> Execution::ToObject(Handle<Object> obj, bool* exc) {
-  if (obj->IsJSObject()) return obj;
+  if (obj->IsSpecObject()) return obj;
   RETURN_NATIVE_CALL(to_object, 1, { obj.location() }, exc);
 }
 
 
 Handle<Object> Execution::ToInteger(Handle<Object> obj, bool* exc) {
   RETURN_NATIVE_CALL(to_integer, 1, { obj.location() }, exc);
 }
 
 
 Handle<Object> Execution::ToUint32(Handle<Object> obj, bool* exc) {
@@ skipping 257 matching lines @@
     return isolate->TerminateExecution();
   }
   if (stack_guard->IsInterrupted()) {
     stack_guard->Continue(INTERRUPT);
     return isolate->StackOverflow();
   }
   return isolate->heap()->undefined_value();
 }
 
 } }  // namespace v8::internal