[strong] Make functions and generators non-extensible non-constructors

src/contexts.h

 // Copyright 2012 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.
 
 #ifndef V8_CONTEXTS_H_
 #define V8_CONTEXTS_H_
 
 #include "src/heap/heap.h"
 #include "src/objects.h"
 
@@ skipping 107 matching lines @@
   V(UINT32_ARRAY_EXTERNAL_MAP_INDEX, Map, uint32_array_external_map)           \
   V(FLOAT32_ARRAY_EXTERNAL_MAP_INDEX, Map, float32_array_external_map)         \
   V(FLOAT64_ARRAY_EXTERNAL_MAP_INDEX, Map, float64_array_external_map)         \
   V(UINT8_CLAMPED_ARRAY_EXTERNAL_MAP_INDEX, Map,                               \
     uint8_clamped_array_external_map)                                          \
   V(DATA_VIEW_FUN_INDEX, JSFunction, data_view_fun)                            \
   V(SLOPPY_FUNCTION_MAP_INDEX, Map, sloppy_function_map)                       \
   V(SLOPPY_FUNCTION_WITH_READONLY_PROTOTYPE_MAP_INDEX, Map,                    \
     sloppy_function_with_readonly_prototype_map)                               \
   V(STRICT_FUNCTION_MAP_INDEX, Map, strict_function_map)                       \
+  V(STRONG_FUNCTION_MAP_INDEX, Map, strong_function_map)                       \
   V(SLOPPY_FUNCTION_WITHOUT_PROTOTYPE_MAP_INDEX, Map,                          \
     sloppy_function_without_prototype_map)                                     \
   V(STRICT_FUNCTION_WITHOUT_PROTOTYPE_MAP_INDEX, Map,                          \
     strict_function_without_prototype_map)                                     \
+  V(STRONG_CONSTRUCTOR_MAP_INDEX, Map, strong_constructor_map)                 \
   V(BOUND_FUNCTION_MAP_INDEX, Map, bound_function_map)                         \
   V(REGEXP_RESULT_MAP_INDEX, Map, regexp_result_map)                           \
   V(SLOPPY_ARGUMENTS_MAP_INDEX, Map, sloppy_arguments_map)                     \
   V(ALIASED_ARGUMENTS_MAP_INDEX, Map, aliased_arguments_map)                   \
   V(STRICT_ARGUMENTS_MAP_INDEX, Map, strict_arguments_map)                     \
   V(MESSAGE_LISTENERS_INDEX, JSObject, message_listeners)                      \
   V(MAKE_MESSAGE_FUN_INDEX, JSFunction, make_message_fun)                      \
   V(GET_STACK_TRACE_LINE_INDEX, JSFunction, get_stack_trace_line_fun)          \
   V(CONFIGURE_GLOBAL_INDEX, JSFunction, configure_global_fun)                  \
   V(FUNCTION_CACHE_INDEX, FixedArray, function_cache)                          \
@@ skipping 27 matching lines @@
   V(OBSERVERS_NOTIFY_CHANGE_INDEX, JSFunction, observers_notify_change)        \
   V(OBSERVERS_ENQUEUE_SPLICE_INDEX, JSFunction, observers_enqueue_splice)      \
   V(OBSERVERS_BEGIN_SPLICE_INDEX, JSFunction, observers_begin_perform_splice)  \
   V(OBSERVERS_END_SPLICE_INDEX, JSFunction, observers_end_perform_splice)      \
   V(NATIVE_OBJECT_OBSERVE_INDEX, JSFunction, native_object_observe)            \
   V(NATIVE_OBJECT_GET_NOTIFIER_INDEX, JSFunction, native_object_get_notifier)  \
   V(NATIVE_OBJECT_NOTIFIER_PERFORM_CHANGE, JSFunction,                         \
     native_object_notifier_perform_change)                                     \
   V(SLOPPY_GENERATOR_FUNCTION_MAP_INDEX, Map, sloppy_generator_function_map)   \
   V(STRICT_GENERATOR_FUNCTION_MAP_INDEX, Map, strict_generator_function_map)   \
+  V(STRONG_GENERATOR_FUNCTION_MAP_INDEX, Map, strong_generator_function_map)   \
   V(GENERATOR_OBJECT_PROTOTYPE_MAP_INDEX, Map, generator_object_prototype_map) \
   V(ITERATOR_RESULT_MAP_INDEX, Map, iterator_result_map)                       \
   V(MAP_ITERATOR_MAP_INDEX, Map, map_iterator_map)                             \
   V(SET_ITERATOR_MAP_INDEX, Map, set_iterator_map)                             \
   V(ARRAY_VALUES_ITERATOR_INDEX, JSFunction, array_values_iterator)            \
   V(SCRIPT_CONTEXT_TABLE_INDEX, ScriptContextTable, script_context_table)
 
 
 // A table of all script contexts. Every loaded top-level script with top-level
 // lexical declarations contributes its ScriptContext into this table.
@@ skipping 123 matching lines @@
     // These slots are only in native contexts.
     GLOBAL_PROXY_INDEX = MIN_CONTEXT_SLOTS,
     SECURITY_TOKEN_INDEX,
     SLOPPY_ARGUMENTS_MAP_INDEX,
     ALIASED_ARGUMENTS_MAP_INDEX,
     STRICT_ARGUMENTS_MAP_INDEX,
     REGEXP_RESULT_MAP_INDEX,
     SLOPPY_FUNCTION_MAP_INDEX,
     SLOPPY_FUNCTION_WITH_READONLY_PROTOTYPE_MAP_INDEX,
     STRICT_FUNCTION_MAP_INDEX,
+    STRONG_FUNCTION_MAP_INDEX,
     SLOPPY_FUNCTION_WITHOUT_PROTOTYPE_MAP_INDEX,
     STRICT_FUNCTION_WITHOUT_PROTOTYPE_MAP_INDEX,
+    STRONG_CONSTRUCTOR_MAP_INDEX,
     BOUND_FUNCTION_MAP_INDEX,
     INITIAL_OBJECT_PROTOTYPE_INDEX,
     INITIAL_ARRAY_PROTOTYPE_INDEX,
     BOOLEAN_FUNCTION_INDEX,
     NUMBER_FUNCTION_INDEX,
     STRING_FUNCTION_INDEX,
     STRING_FUNCTION_PROTOTYPE_MAP_INDEX,
     SYMBOL_FUNCTION_INDEX,
     OBJECT_FUNCTION_INDEX,
     INTERNAL_ARRAY_FUNCTION_INDEX,
@@ skipping 65 matching lines @@
     PROXY_ENUMERATE_INDEX,
     OBSERVERS_NOTIFY_CHANGE_INDEX,
     OBSERVERS_ENQUEUE_SPLICE_INDEX,
     OBSERVERS_BEGIN_SPLICE_INDEX,
     OBSERVERS_END_SPLICE_INDEX,
     NATIVE_OBJECT_OBSERVE_INDEX,
     NATIVE_OBJECT_GET_NOTIFIER_INDEX,
     NATIVE_OBJECT_NOTIFIER_PERFORM_CHANGE,
     SLOPPY_GENERATOR_FUNCTION_MAP_INDEX,
     STRICT_GENERATOR_FUNCTION_MAP_INDEX,
+    STRONG_GENERATOR_FUNCTION_MAP_INDEX,
     GENERATOR_OBJECT_PROTOTYPE_MAP_INDEX,
     ITERATOR_RESULT_MAP_INDEX,
     MAP_ITERATOR_MAP_INDEX,
     SET_ITERATOR_MAP_INDEX,
     ARRAY_VALUES_ITERATOR_INDEX,
     SCRIPT_CONTEXT_TABLE_INDEX,
     MAP_CACHE_INDEX,
     TO_LENGTH_FUN_INDEX,
 
     // Properties from here are treated as weak references by the full GC.
@@ skipping 144 matching lines @@
                         PropertyAttributes* attributes,
                         BindingFlags* binding_flags);
 
   // Code generation support.
   static int SlotOffset(int index) {
     return kHeaderSize + index * kPointerSize - kHeapObjectTag;
   }
 
   static int FunctionMapIndex(LanguageMode language_mode, FunctionKind kind) {
     if (IsGeneratorFunction(kind)) {
-      return is_strict(language_mode) ? STRICT_GENERATOR_FUNCTION_MAP_INDEX
+      return is_strong(language_mode) ? STRONG_GENERATOR_FUNCTION_MAP_INDEX :
+             is_strict(language_mode) ? STRICT_GENERATOR_FUNCTION_MAP_INDEX
                                       : SLOPPY_GENERATOR_FUNCTION_MAP_INDEX;
     }
 
+    if (IsConstructor(kind)) {
+      return is_strong(language_mode) ? STRONG_CONSTRUCTOR_MAP_INDEX :
+             is_strict(language_mode) ? STRICT_FUNCTION_MAP_INDEX
+                                      : SLOPPY_FUNCTION_MAP_INDEX;
+    }
+
     if (IsArrowFunction(kind) || IsConciseMethod(kind) ||
         IsAccessorFunction(kind)) {
-      return is_strict(language_mode)
-                 ? STRICT_FUNCTION_WITHOUT_PROTOTYPE_MAP_INDEX
-                 : SLOPPY_FUNCTION_WITHOUT_PROTOTYPE_MAP_INDEX;
+      return is_strong(language_mode) ? STRONG_FUNCTION_MAP_INDEX :
+             is_strict(language_mode) ?
+                 STRICT_FUNCTION_WITHOUT_PROTOTYPE_MAP_INDEX :
+                 SLOPPY_FUNCTION_WITHOUT_PROTOTYPE_MAP_INDEX;
     }
 
-    return is_strict(language_mode) ? STRICT_FUNCTION_MAP_INDEX
+    return is_strong(language_mode) ? STRONG_FUNCTION_MAP_INDEX :
+           is_strict(language_mode) ? STRICT_FUNCTION_MAP_INDEX
                                     : SLOPPY_FUNCTION_MAP_INDEX;
   }
 
   static const int kSize = kHeaderSize + NATIVE_CONTEXT_SLOTS * kPointerSize;
 
   // GC support.
   typedef FixedBodyDescriptor<
       kHeaderSize, kSize, kSize> ScavengeBodyDescriptor;
 
   typedef FixedBodyDescriptor<
@@ skipping 11 matching lines @@
   static bool IsBootstrappingOrGlobalObject(Isolate* isolate, Object* object);
 #endif
 
   STATIC_ASSERT(kHeaderSize == Internals::kContextHeaderSize);
   STATIC_ASSERT(EMBEDDER_DATA_INDEX == Internals::kContextEmbedderDataIndex);
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_CONTEXTS_H_