Implement cross-origin attributes using access check interceptors.

third_party/WebKit/Source/bindings/scripts/v8_interface.py

 # Copyright (C) 2013 Google Inc. All rights reserved.
 # coding=utf-8
 #
 # 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
@@ skipping 358 matching lines @@
     if has_conditional_attributes and interface.is_partial:
         raise Exception('Conditional attributes between partial interfaces in modules and the original interfaces(%s) in core are not allowed.' % interface.name)
 
     context.update({
         'attributes': attributes,
     })
 
     # Methods
     methods, iterator_method = methods_context(interface)
     context.update({
-        'has_origin_safe_method_setter': is_global and any(
-            method['is_check_security_for_receiver'] and not method['is_unforgeable']
+        'has_origin_safe_method_setter': any(method['is_cross_origin'] and not method['is_unforgeable']
             for method in methods),
         'has_private_script': (any(attribute['is_implemented_in_private_script'] for attribute in attributes) or
                                any(method['is_implemented_in_private_script'] for method in methods)),
         'iterator_method': iterator_method,
         'methods': methods,
     })
 
     # Window.idl in Blink has indexed properties, but the spec says Window
     # interface doesn't have indexed properties, instead the WindowProxy exotic
     # object has indexed properties.  Thus, Window interface must not support
@@ skipping 25 matching lines @@
         'named_property_deleter': property_deleter(interface.named_property_deleter),
     })
     context.update({
         'has_named_properties_object': is_global and context['named_property_getter'],
     })
 
     # Origin Trials
     context.update({
         'origin_trial_features': origin_trial_features(interface, context['constants'], context['attributes'], context['methods']),
     })
+
+    # Cross-origin interceptors
+    has_cross_origin_named_getter = False
+    has_cross_origin_named_setter = False
+    has_cross_origin_indexed_getter = False
+
+    for attribute in attributes:
+        if attribute['has_cross_origin_getter']:
+            has_cross_origin_named_getter = True
+        if attribute['has_cross_origin_setter']:
+            has_cross_origin_named_setter = True
+
+    # Methods are exposed as getter attributes on the interface: e.g.
+    # window.location gets the location attribute on the Window interface. For
+    # the cross-origin case, this attribute getter is guaranteed to only return
+    # a Function object, which the actual call is dispatched against.
+    for method in methods:
+        if method['is_cross_origin']:
+            has_cross_origin_named_getter = True
+
+    has_cross_origin_named_enumerator = has_cross_origin_named_getter or has_cross_origin_named_setter  # pylint: disable=invalid-name
+
+    if context['named_property_getter'] and context['named_property_getter']['is_cross_origin']:
+        has_cross_origin_named_getter = True
+
+    if context['indexed_property_getter'] and context['indexed_property_getter']['is_cross_origin']:
+        has_cross_origin_indexed_getter = True
+
+    context.update({
+        'has_cross_origin_named_getter': has_cross_origin_named_getter,
+        'has_cross_origin_named_setter': has_cross_origin_named_setter,
+        'has_cross_origin_named_enumerator': has_cross_origin_named_enumerator,
+        'has_cross_origin_indexed_getter': has_cross_origin_indexed_getter,
+    })
+
     return context
 
 
 def methods_context(interface):
     """Creates a list of Jinja template contexts for methods of an interface.
 
     Args:
         interface: An interface to create contexts for
 
     Returns:
@@ skipping 355 matching lines @@
                     if method.get('runtime_enabled_function'))
                 if not runtime_enabled_functions:
                     # This "length" is unconditionally enabled, so stop here.
                     runtime_determined_maxargs.append((length, [None]))
                     break
                 runtime_determined_maxargs.append(
                     (length, sorted(runtime_enabled_functions)))
             maxarg = ('%sV8Internal::%sMethodMaxArg()'
                       % (cpp_name_or_partial(interface), name))
 
-    # Check and fail if overloads disagree on any of the extended attributes
-    # that affect how the method should be registered.
-    # Skip the check for overloaded constructors, since they don't support any
-    # of the extended attributes in question.
-    if not overloads[0].get('is_constructor'):
-        overload_extended_attributes = [
-            method['custom_registration_extended_attributes']
-            for method in overloads]
-        for extended_attribute in v8_methods.CUSTOM_REGISTRATION_EXTENDED_ATTRIBUTES:
-            if common_key(overload_extended_attributes, extended_attribute) is None:
-                raise ValueError('Overloads of %s have conflicting extended attribute %s'
-                                 % (name, extended_attribute))
-
     # Check and fail if overloads disagree about whether the return type
     # is a Promise or not.
     promise_overload_count = sum(1 for method in overloads if method.get('returns_promise'))
     if promise_overload_count not in (0, len(overloads)):
         raise ValueError('Overloads of %s have conflicting Promise/non-Promise types'
                          % (name))
 
     has_overload_visible = False
     has_overload_not_visible = False
     for overload in overloads:
         if overload.get('visible', True):
             # If there exists an overload which is visible, need to generate
             # overload_resolution, i.e. overlods_visible should be True.
             has_overload_visible = True
         else:
             has_overload_not_visible = True
 
     # If some overloads are not visible and others are visible,
     # the method is overloaded between core and modules.
     has_partial_overloads = has_overload_visible and has_overload_not_visible
 
     return {
         'deprecate_all_as': common_value(overloads, 'deprecate_as'),  # [DeprecateAs]
         'exposed_test_all': common_value(overloads, 'exposed_test'),  # [Exposed]
-        'has_custom_registration_all': common_value(overloads, 'has_custom_registration'),
         'length': function_length,
         'length_tests_methods': length_tests_methods(effective_overloads_by_length),
         # 1. Let maxarg be the length of the longest type list of the
         # entries in S.
         'maxarg': maxarg,
         'measure_all_as': common_value(overloads, 'measure_as'),  # [MeasureAs]
         'returns_promise_all': promise_overload_count > 0,
         'runtime_determined_lengths': runtime_determined_lengths,
         'runtime_determined_maxargs': runtime_determined_maxargs,
         'runtime_enabled_function_all': common_value(overloads, 'runtime_enabled_function'),  # [RuntimeEnabled]
@@ skipping 549 matching lines @@
     if is_raises_exception:
         cpp_arguments.append('exceptionState')
     if use_output_parameter_for_result:
         cpp_arguments.append('result')
 
     cpp_value = '%s(%s)' % (cpp_method_name, ', '.join(cpp_arguments))
 
     return {
         'cpp_type': idl_type.cpp_type,
         'cpp_value': cpp_value,
-        'do_not_check_security': 'DoNotCheckSecurity' in extended_attributes,
         'is_call_with_script_state': is_call_with_script_state,
+        'is_cross_origin': 'CrossOrigin' in extended_attributes,
         'is_custom':
             'Custom' in extended_attributes and
             (not extended_attributes['Custom'] or
              has_extended_attribute_value(getter, 'Custom', 'PropertyGetter')),
         'is_custom_property_enumerator': has_extended_attribute_value(
             getter, 'Custom', 'PropertyEnumerator'),
         'is_custom_property_query': has_extended_attribute_value(
             getter, 'Custom', 'PropertyQuery'),
         'is_enumerable': 'NotEnumerable' not in extended_attributes,
         'is_null_expression': is_null_expression(idl_type),
@@ skipping 43 matching lines @@
     extended_attributes = deleter.extended_attributes
     is_call_with_script_state = v8_utilities.has_extended_attribute_value(deleter, 'CallWith', 'ScriptState')
     is_ce_reactions = 'CEReactions' in extended_attributes
     return {
         'is_call_with_script_state': is_call_with_script_state,
         'is_ce_reactions': is_ce_reactions,
         'is_custom': 'Custom' in extended_attributes,
         'is_raises_exception': 'RaisesException' in extended_attributes,
         'name': cpp_name(deleter),
     }