Esempio n. 1
0
/**
 * Function object creation operation.
 *
 * See also: ECMA-262 v5, 13.2
 *
 * @return pointer to newly created Function object
 */
ecma_object_t *
ecma_op_create_function_object (ecma_object_t *scope_p, /**< function's scope */
                                const ecma_compiled_code_t *bytecode_data_p) /**< byte-code array */
{
  /* 1., 4., 13. */
  ecma_object_t *prototype_obj_p = ecma_builtin_get (ECMA_BUILTIN_ID_FUNCTION_PROTOTYPE);

  ecma_object_t *func_p = ecma_create_object (prototype_obj_p,
                                              sizeof (ecma_extended_object_t),
                                              ECMA_OBJECT_TYPE_FUNCTION);

  ecma_deref_object (prototype_obj_p);

  /* 2., 6., 7., 8. */
  /*
   * We don't setup [[Get]], [[Call]], [[Construct]], [[HasInstance]] for each function object.
   * Instead we set the object's type to ECMA_OBJECT_TYPE_FUNCTION
   * that defines which version of the routine should be used on demand.
   */

  /* 3. */
  /*
   * [[Class]] property is not stored explicitly for objects of ECMA_OBJECT_TYPE_FUNCTION type.
   *
   * See also: ecma_object_get_class_name
   */

  ecma_extended_object_t *ext_func_p = (ecma_extended_object_t *) func_p;

  /* 9. */
  ECMA_SET_INTERNAL_VALUE_POINTER (ext_func_p->u.function.scope_cp, scope_p);

  /* 10., 11., 12. */
  ECMA_SET_INTERNAL_VALUE_POINTER (ext_func_p->u.function.bytecode_cp, bytecode_data_p);
  ecma_bytecode_ref ((ecma_compiled_code_t *) bytecode_data_p);

  /* 14., 15., 16., 17., 18. */
  /*
   * 'length' and 'prototype' properties are instantiated lazily
   *
   * See also: ecma_op_function_try_to_lazy_instantiate_property
   */

  return func_p;
} /* ecma_op_create_function_object */
Esempio n. 2
0
/**
 * Function object creation operation.
 *
 * See also: ECMA-262 v5, 13.2
 *
 * @return pointer to newly created Function object
 */
ecma_object_t *
ecma_op_create_function_object (ecma_object_t *scope_p, /**< function's scope */
                                bool is_decl_in_strict_mode, /**< is function declared in strict mode code? */
                                const ecma_compiled_code_t *bytecode_data_p) /**< byte-code array */
{
  bool is_strict_mode_code = is_decl_in_strict_mode;

  if (bytecode_data_p->status_flags & CBC_CODE_FLAGS_STRICT_MODE)
  {
    is_strict_mode_code = true;
  }

  // 1., 4., 13.
  ecma_object_t *prototype_obj_p = ecma_builtin_get (ECMA_BUILTIN_ID_FUNCTION_PROTOTYPE);

  ecma_object_t *func_p = ecma_create_object (prototype_obj_p,
                                              sizeof (ecma_extended_object_t),
                                              ECMA_OBJECT_TYPE_FUNCTION);

  ecma_deref_object (prototype_obj_p);

  // 2., 6., 7., 8.
  /*
   * We don't setup [[Get]], [[Call]], [[Construct]], [[HasInstance]] for each function object.
   * Instead we set the object's type to ECMA_OBJECT_TYPE_FUNCTION
   * that defines which version of the routine should be used on demand.
   */

  // 3.
  /*
   * [[Class]] property is not stored explicitly for objects of ECMA_OBJECT_TYPE_FUNCTION type.
   *
   * See also: ecma_object_get_class_name
   */

  ecma_extended_object_t *ext_func_p = (ecma_extended_object_t *) func_p;

  // 9.
  ECMA_SET_INTERNAL_VALUE_POINTER (ext_func_p->u.function.scope_cp, scope_p);

  // 10., 11., 12.
  ECMA_SET_INTERNAL_VALUE_POINTER (ext_func_p->u.function.bytecode_cp, bytecode_data_p);
  ecma_bytecode_ref ((ecma_compiled_code_t *) bytecode_data_p);

  // 14., 15., 16., 17., 18.
  /*
   * 'length' and 'prototype' properties are instantiated lazily
   *
   * See also: ecma_op_function_try_lazy_instantiate_property
   */

  // 19.
  if (is_strict_mode_code)
  {
    ecma_object_t *thrower_p = ecma_builtin_get (ECMA_BUILTIN_ID_TYPE_ERROR_THROWER);

    ecma_property_descriptor_t prop_desc = ecma_make_empty_property_descriptor ();
    {
      prop_desc.is_enumerable_defined = true;
      prop_desc.is_enumerable = false;

      prop_desc.is_configurable_defined = true;
      prop_desc.is_configurable = false;

      prop_desc.is_get_defined = true;
      prop_desc.get_p = thrower_p;

      prop_desc.is_set_defined = true;
      prop_desc.set_p = thrower_p;
    }

    ecma_string_t *magic_string_caller_p = ecma_get_magic_string (LIT_MAGIC_STRING_CALLER);
    ecma_op_object_define_own_property (func_p,
                                        magic_string_caller_p,
                                        &prop_desc,
                                        false);
    ecma_deref_ecma_string (magic_string_caller_p);

    ecma_string_t *magic_string_arguments_p = ecma_get_magic_string (LIT_MAGIC_STRING_ARGUMENTS);
    ecma_op_object_define_own_property (func_p,
                                        magic_string_arguments_p,
                                        &prop_desc,
                                        false);
    ecma_deref_ecma_string (magic_string_arguments_p);

    ecma_deref_object (thrower_p);
  }

  return func_p;
} /* ecma_op_create_function_object */