LCOV - code coverage report
Current view: top level - src - contexts.h (source / functions) Hit Total Coverage
Test: app.info Lines: 6 6 100.0 %
Date: 2019-02-19 Functions: 3 3 100.0 %

          Line data    Source code
       1             : // Copyright 2012 the V8 project authors. All rights reserved.
       2             : // Use of this source code is governed by a BSD-style license that can be
       3             : // found in the LICENSE file.
       4             : 
       5             : #ifndef V8_CONTEXTS_H_
       6             : #define V8_CONTEXTS_H_
       7             : 
       8             : #include "src/function-kind.h"
       9             : #include "src/objects/fixed-array.h"
      10             : // Has to be the last include (doesn't have include guards):
      11             : #include "src/objects/object-macros.h"
      12             : 
      13             : namespace v8 {
      14             : namespace internal {
      15             : 
      16             : class JSGlobalObject;
      17             : class JSGlobalProxy;
      18             : class MicrotaskQueue;
      19             : class NativeContext;
      20             : class RegExpMatchInfo;
      21             : 
      22             : enum ContextLookupFlags {
      23             :   FOLLOW_CONTEXT_CHAIN = 1 << 0,
      24             :   FOLLOW_PROTOTYPE_CHAIN = 1 << 1,
      25             : 
      26             :   DONT_FOLLOW_CHAINS = 0,
      27             :   FOLLOW_CHAINS = FOLLOW_CONTEXT_CHAIN | FOLLOW_PROTOTYPE_CHAIN,
      28             : };
      29             : 
      30             : // Heap-allocated activation contexts.
      31             : //
      32             : // Contexts are implemented as FixedArray-like objects having a fixed
      33             : // header with a set of common fields.
      34             : //
      35             : // Note: Context must have no virtual functions and Context objects
      36             : // must always be allocated via Heap::AllocateContext() or
      37             : // Factory::NewContext.
      38             : 
      39             : #define NATIVE_CONTEXT_INTRINSIC_FUNCTIONS(V)                           \
      40             :   V(ASYNC_FUNCTION_PROMISE_CREATE_INDEX, JSFunction,                    \
      41             :     async_function_promise_create)                                      \
      42             :   V(IS_ARRAYLIKE, JSFunction, is_arraylike)                             \
      43             :   V(GENERATOR_NEXT_INTERNAL, JSFunction, generator_next_internal)       \
      44             :   V(MAKE_ERROR_INDEX, JSFunction, make_error)                           \
      45             :   V(MAKE_RANGE_ERROR_INDEX, JSFunction, make_range_error)               \
      46             :   V(MAKE_SYNTAX_ERROR_INDEX, JSFunction, make_syntax_error)             \
      47             :   V(MAKE_TYPE_ERROR_INDEX, JSFunction, make_type_error)                 \
      48             :   V(MAKE_URI_ERROR_INDEX, JSFunction, make_uri_error)                   \
      49             :   V(OBJECT_CREATE, JSFunction, object_create)                           \
      50             :   V(OBJECT_DEFINE_PROPERTIES, JSFunction, object_define_properties)     \
      51             :   V(OBJECT_DEFINE_PROPERTY, JSFunction, object_define_property)         \
      52             :   V(OBJECT_GET_PROTOTYPE_OF, JSFunction, object_get_prototype_of)       \
      53             :   V(OBJECT_IS_EXTENSIBLE, JSFunction, object_is_extensible)             \
      54             :   V(OBJECT_IS_FROZEN, JSFunction, object_is_frozen)                     \
      55             :   V(OBJECT_IS_SEALED, JSFunction, object_is_sealed)                     \
      56             :   V(OBJECT_KEYS, JSFunction, object_keys)                               \
      57             :   V(REFLECT_APPLY_INDEX, JSFunction, reflect_apply)                     \
      58             :   V(REFLECT_CONSTRUCT_INDEX, JSFunction, reflect_construct)             \
      59             :   V(REFLECT_DEFINE_PROPERTY_INDEX, JSFunction, reflect_define_property) \
      60             :   V(REFLECT_DELETE_PROPERTY_INDEX, JSFunction, reflect_delete_property) \
      61             :   V(MATH_FLOOR_INDEX, JSFunction, math_floor)                           \
      62             :   V(MATH_POW_INDEX, JSFunction, math_pow)                               \
      63             :   V(NEW_PROMISE_CAPABILITY_INDEX, JSFunction, new_promise_capability)   \
      64             :   V(PROMISE_INTERNAL_CONSTRUCTOR_INDEX, JSFunction,                     \
      65             :     promise_internal_constructor)                                       \
      66             :   V(IS_PROMISE_INDEX, JSFunction, is_promise)                           \
      67             :   V(PROMISE_THEN_INDEX, JSFunction, promise_then)
      68             : 
      69             : #define NATIVE_CONTEXT_FIELDS(V)                                               \
      70             :   V(GLOBAL_PROXY_INDEX, JSGlobalProxy, global_proxy_object)                    \
      71             :   /* TODO(ishell): Actually we store exactly EmbedderDataArray here but */     \
      72             :   /* it's already UBSan-fiendly and doesn't require a star... So declare */    \
      73             :   /* it as a HeapObject for now. */                                            \
      74             :   V(EMBEDDER_DATA_INDEX, HeapObject, embedder_data)                            \
      75             :   /* Below is alpha-sorted */                                                  \
      76             :   V(ACCESSOR_PROPERTY_DESCRIPTOR_MAP_INDEX, Map,                               \
      77             :     accessor_property_descriptor_map)                                          \
      78             :   V(ALLOW_CODE_GEN_FROM_STRINGS_INDEX, Object, allow_code_gen_from_strings)    \
      79             :   V(ARRAY_BUFFER_FUN_INDEX, JSFunction, array_buffer_fun)                      \
      80             :   V(ARRAY_BUFFER_MAP_INDEX, Map, array_buffer_map)                             \
      81             :   V(ARRAY_BUFFER_NOINIT_FUN_INDEX, JSFunction, array_buffer_noinit_fun)        \
      82             :   V(ARRAY_FUNCTION_INDEX, JSFunction, array_function)                          \
      83             :   V(ARRAY_JOIN_STACK_INDEX, HeapObject, array_join_stack)                      \
      84             :   V(ASYNC_FROM_SYNC_ITERATOR_MAP_INDEX, Map, async_from_sync_iterator_map)     \
      85             :   V(ASYNC_FUNCTION_AWAIT_REJECT_SHARED_FUN, SharedFunctionInfo,                \
      86             :     async_function_await_reject_shared_fun)                                    \
      87             :   V(ASYNC_FUNCTION_AWAIT_RESOLVE_SHARED_FUN, SharedFunctionInfo,               \
      88             :     async_function_await_resolve_shared_fun)                                   \
      89             :   V(ASYNC_FUNCTION_FUNCTION_INDEX, JSFunction, async_function_constructor)     \
      90             :   V(ASYNC_FUNCTION_OBJECT_MAP_INDEX, Map, async_function_object_map)           \
      91             :   V(ASYNC_GENERATOR_FUNCTION_FUNCTION_INDEX, JSFunction,                       \
      92             :     async_generator_function_function)                                         \
      93             :   V(ASYNC_ITERATOR_VALUE_UNWRAP_SHARED_FUN, SharedFunctionInfo,                \
      94             :     async_iterator_value_unwrap_shared_fun)                                    \
      95             :   V(ASYNC_GENERATOR_AWAIT_REJECT_SHARED_FUN, SharedFunctionInfo,               \
      96             :     async_generator_await_reject_shared_fun)                                   \
      97             :   V(ASYNC_GENERATOR_AWAIT_RESOLVE_SHARED_FUN, SharedFunctionInfo,              \
      98             :     async_generator_await_resolve_shared_fun)                                  \
      99             :   V(ASYNC_GENERATOR_YIELD_RESOLVE_SHARED_FUN, SharedFunctionInfo,              \
     100             :     async_generator_yield_resolve_shared_fun)                                  \
     101             :   V(ASYNC_GENERATOR_RETURN_RESOLVE_SHARED_FUN, SharedFunctionInfo,             \
     102             :     async_generator_return_resolve_shared_fun)                                 \
     103             :   V(ASYNC_GENERATOR_RETURN_CLOSED_RESOLVE_SHARED_FUN, SharedFunctionInfo,      \
     104             :     async_generator_return_closed_resolve_shared_fun)                          \
     105             :   V(ASYNC_GENERATOR_RETURN_CLOSED_REJECT_SHARED_FUN, SharedFunctionInfo,       \
     106             :     async_generator_return_closed_reject_shared_fun)                           \
     107             :   V(ATOMICS_OBJECT, JSObject, atomics_object)                                  \
     108             :   V(BIGINT_FUNCTION_INDEX, JSFunction, bigint_function)                        \
     109             :   V(BIGINT64_ARRAY_FUN_INDEX, JSFunction, bigint64_array_fun)                  \
     110             :   V(BIGUINT64_ARRAY_FUN_INDEX, JSFunction, biguint64_array_fun)                \
     111             :   V(BOOLEAN_FUNCTION_INDEX, JSFunction, boolean_function)                      \
     112             :   V(BOUND_FUNCTION_WITH_CONSTRUCTOR_MAP_INDEX, Map,                            \
     113             :     bound_function_with_constructor_map)                                       \
     114             :   V(BOUND_FUNCTION_WITHOUT_CONSTRUCTOR_MAP_INDEX, Map,                         \
     115             :     bound_function_without_constructor_map)                                    \
     116             :   V(CALL_AS_CONSTRUCTOR_DELEGATE_INDEX, JSFunction,                            \
     117             :     call_as_constructor_delegate)                                              \
     118             :   V(CALL_AS_FUNCTION_DELEGATE_INDEX, JSFunction, call_as_function_delegate)    \
     119             :   V(CALLSITE_FUNCTION_INDEX, JSFunction, callsite_function)                    \
     120             :   V(CONTEXT_EXTENSION_FUNCTION_INDEX, JSFunction, context_extension_function)  \
     121             :   V(DATA_PROPERTY_DESCRIPTOR_MAP_INDEX, Map, data_property_descriptor_map)     \
     122             :   V(DATA_VIEW_FUN_INDEX, JSFunction, data_view_fun)                            \
     123             :   V(DATE_FUNCTION_INDEX, JSFunction, date_function)                            \
     124             :   V(DEBUG_CONTEXT_ID_INDEX, Object, debug_context_id)                          \
     125             :   V(EMPTY_FUNCTION_INDEX, JSFunction, empty_function)                          \
     126             :   V(ERROR_MESSAGE_FOR_CODE_GEN_FROM_STRINGS_INDEX, Object,                     \
     127             :     error_message_for_code_gen_from_strings)                                   \
     128             :   V(ERRORS_THROWN_INDEX, Smi, errors_thrown)                                   \
     129             :   V(EXTRAS_EXPORTS_OBJECT_INDEX, JSObject, extras_binding_object)              \
     130             :   V(EXTRAS_UTILS_OBJECT_INDEX, Object, extras_utils_object)                    \
     131             :   V(FAST_ALIASED_ARGUMENTS_MAP_INDEX, Map, fast_aliased_arguments_map)         \
     132             :   V(FAST_TEMPLATE_INSTANTIATIONS_CACHE_INDEX, FixedArray,                      \
     133             :     fast_template_instantiations_cache)                                        \
     134             :   V(FLOAT32_ARRAY_FUN_INDEX, JSFunction, float32_array_fun)                    \
     135             :   V(FLOAT64_ARRAY_FUN_INDEX, JSFunction, float64_array_fun)                    \
     136             :   V(FUNCTION_FUNCTION_INDEX, JSFunction, function_function)                    \
     137             :   V(GENERATOR_FUNCTION_FUNCTION_INDEX, JSFunction,                             \
     138             :     generator_function_function)                                               \
     139             :   V(GENERATOR_OBJECT_PROTOTYPE_MAP_INDEX, Map, generator_object_prototype_map) \
     140             :   V(ASYNC_GENERATOR_OBJECT_PROTOTYPE_MAP_INDEX, Map,                           \
     141             :     async_generator_object_prototype_map)                                      \
     142             :   V(INITIAL_ARRAY_ITERATOR_MAP_INDEX, Map, initial_array_iterator_map)         \
     143             :   V(INITIAL_ARRAY_ITERATOR_PROTOTYPE_INDEX, JSObject,                          \
     144             :     initial_array_iterator_prototype)                                          \
     145             :   V(INITIAL_ARRAY_PROTOTYPE_INDEX, JSObject, initial_array_prototype)          \
     146             :   V(INITIAL_ERROR_PROTOTYPE_INDEX, JSObject, initial_error_prototype)          \
     147             :   V(INITIAL_GENERATOR_PROTOTYPE_INDEX, JSObject, initial_generator_prototype)  \
     148             :   V(INITIAL_ASYNC_GENERATOR_PROTOTYPE_INDEX, JSObject,                         \
     149             :     initial_async_generator_prototype)                                         \
     150             :   V(INITIAL_ITERATOR_PROTOTYPE_INDEX, JSObject, initial_iterator_prototype)    \
     151             :   V(INITIAL_MAP_ITERATOR_PROTOTYPE_INDEX, JSObject,                            \
     152             :     initial_map_iterator_prototype)                                            \
     153             :   V(INITIAL_MAP_PROTOTYPE_MAP_INDEX, Map, initial_map_prototype_map)           \
     154             :   V(INITIAL_OBJECT_PROTOTYPE_INDEX, JSObject, initial_object_prototype)        \
     155             :   V(INITIAL_SET_ITERATOR_PROTOTYPE_INDEX, JSObject,                            \
     156             :     initial_set_iterator_prototype)                                            \
     157             :   V(INITIAL_SET_PROTOTYPE_INDEX, JSObject, initial_set_prototype)              \
     158             :   V(INITIAL_SET_PROTOTYPE_MAP_INDEX, Map, initial_set_prototype_map)           \
     159             :   V(INITIAL_STRING_ITERATOR_MAP_INDEX, Map, initial_string_iterator_map)       \
     160             :   V(INITIAL_STRING_ITERATOR_PROTOTYPE_INDEX, JSObject,                         \
     161             :     initial_string_iterator_prototype)                                         \
     162             :   V(INITIAL_STRING_PROTOTYPE_INDEX, JSObject, initial_string_prototype)        \
     163             :   V(INITIAL_WEAKMAP_PROTOTYPE_MAP_INDEX, Map, initial_weakmap_prototype_map)   \
     164             :   V(INITIAL_WEAKSET_PROTOTYPE_MAP_INDEX, Map, initial_weakset_prototype_map)   \
     165             :   V(INT16_ARRAY_FUN_INDEX, JSFunction, int16_array_fun)                        \
     166             :   V(INT32_ARRAY_FUN_INDEX, JSFunction, int32_array_fun)                        \
     167             :   V(INT8_ARRAY_FUN_INDEX, JSFunction, int8_array_fun)                          \
     168             :   V(INTL_COLLATOR_FUNCTION_INDEX, JSFunction, intl_collator_function)          \
     169             :   V(INTL_DATE_TIME_FORMAT_FUNCTION_INDEX, JSFunction,                          \
     170             :     intl_date_time_format_function)                                            \
     171             :   V(INTL_NUMBER_FORMAT_FUNCTION_INDEX, JSFunction,                             \
     172             :     intl_number_format_function)                                               \
     173             :   V(INTL_LOCALE_FUNCTION_INDEX, JSFunction, intl_locale_function)              \
     174             :   V(INTL_SEGMENT_ITERATOR_MAP_INDEX, Map, intl_segment_iterator_map)           \
     175             :   V(ITERATOR_RESULT_MAP_INDEX, Map, iterator_result_map)                       \
     176             :   V(JS_ARRAY_PACKED_SMI_ELEMENTS_MAP_INDEX, Map,                               \
     177             :     js_array_packed_smi_elements_map)                                          \
     178             :   V(JS_ARRAY_HOLEY_SMI_ELEMENTS_MAP_INDEX, Map,                                \
     179             :     js_array_holey_smi_elements_map)                                           \
     180             :   V(JS_ARRAY_PACKED_ELEMENTS_MAP_INDEX, Map, js_array_packed_elements_map)     \
     181             :   V(JS_ARRAY_HOLEY_ELEMENTS_MAP_INDEX, Map, js_array_holey_elements_map)       \
     182             :   V(JS_ARRAY_PACKED_DOUBLE_ELEMENTS_MAP_INDEX, Map,                            \
     183             :     js_array_packed_double_elements_map)                                       \
     184             :   V(JS_ARRAY_HOLEY_DOUBLE_ELEMENTS_MAP_INDEX, Map,                             \
     185             :     js_array_holey_double_elements_map)                                        \
     186             :   V(JS_MAP_FUN_INDEX, JSFunction, js_map_fun)                                  \
     187             :   V(JS_MAP_MAP_INDEX, Map, js_map_map)                                         \
     188             :   V(JS_MODULE_NAMESPACE_MAP, Map, js_module_namespace_map)                     \
     189             :   V(JS_SET_FUN_INDEX, JSFunction, js_set_fun)                                  \
     190             :   V(JS_SET_MAP_INDEX, Map, js_set_map)                                         \
     191             :   V(WEAK_CELL_MAP_INDEX, Map, weak_cell_map)                                   \
     192             :   V(JS_FINALIZATION_GROUP_CLEANUP_ITERATOR_MAP_INDEX, Map,                     \
     193             :     js_finalization_group_cleanup_iterator_map)                                \
     194             :   V(JS_WEAK_MAP_FUN_INDEX, JSFunction, js_weak_map_fun)                        \
     195             :   V(JS_WEAK_REF_MAP_INDEX, Map, js_weak_ref_map)                               \
     196             :   V(JS_WEAK_SET_FUN_INDEX, JSFunction, js_weak_set_fun)                        \
     197             :   V(MAP_CACHE_INDEX, Object, map_cache)                                        \
     198             :   V(MAP_KEY_ITERATOR_MAP_INDEX, Map, map_key_iterator_map)                     \
     199             :   V(MAP_KEY_VALUE_ITERATOR_MAP_INDEX, Map, map_key_value_iterator_map)         \
     200             :   V(MAP_VALUE_ITERATOR_MAP_INDEX, Map, map_value_iterator_map)                 \
     201             :   V(MATH_RANDOM_INDEX_INDEX, Smi, math_random_index)                           \
     202             :   V(MATH_RANDOM_STATE_INDEX, ByteArray, math_random_state)                     \
     203             :   V(MATH_RANDOM_CACHE_INDEX, FixedDoubleArray, math_random_cache)              \
     204             :   V(MESSAGE_LISTENERS_INDEX, TemplateList, message_listeners)                  \
     205             :   V(NORMALIZED_MAP_CACHE_INDEX, Object, normalized_map_cache)                  \
     206             :   V(NUMBER_FUNCTION_INDEX, JSFunction, number_function)                        \
     207             :   V(OBJECT_FUNCTION_INDEX, JSFunction, object_function)                        \
     208             :   V(OBJECT_FUNCTION_PROTOTYPE_MAP_INDEX, Map, object_function_prototype_map)   \
     209             :   V(OPAQUE_REFERENCE_FUNCTION_INDEX, JSFunction, opaque_reference_function)    \
     210             :   V(PROXY_CALLABLE_MAP_INDEX, Map, proxy_callable_map)                         \
     211             :   V(PROXY_CONSTRUCTOR_MAP_INDEX, Map, proxy_constructor_map)                   \
     212             :   V(PROXY_FUNCTION_INDEX, JSFunction, proxy_function)                          \
     213             :   V(PROXY_MAP_INDEX, Map, proxy_map)                                           \
     214             :   V(PROXY_REVOCABLE_RESULT_MAP_INDEX, Map, proxy_revocable_result_map)         \
     215             :   V(PROXY_REVOKE_SHARED_FUN, SharedFunctionInfo, proxy_revoke_shared_fun)      \
     216             :   V(PROMISE_GET_CAPABILITIES_EXECUTOR_SHARED_FUN, SharedFunctionInfo,          \
     217             :     promise_get_capabilities_executor_shared_fun)                              \
     218             :   V(PROMISE_CAPABILITY_DEFAULT_REJECT_SHARED_FUN_INDEX, SharedFunctionInfo,    \
     219             :     promise_capability_default_reject_shared_fun)                              \
     220             :   V(PROMISE_CAPABILITY_DEFAULT_RESOLVE_SHARED_FUN_INDEX, SharedFunctionInfo,   \
     221             :     promise_capability_default_resolve_shared_fun)                             \
     222             :   V(PROMISE_THEN_FINALLY_SHARED_FUN, SharedFunctionInfo,                       \
     223             :     promise_then_finally_shared_fun)                                           \
     224             :   V(PROMISE_CATCH_FINALLY_SHARED_FUN, SharedFunctionInfo,                      \
     225             :     promise_catch_finally_shared_fun)                                          \
     226             :   V(PROMISE_VALUE_THUNK_FINALLY_SHARED_FUN, SharedFunctionInfo,                \
     227             :     promise_value_thunk_finally_shared_fun)                                    \
     228             :   V(PROMISE_THROWER_FINALLY_SHARED_FUN, SharedFunctionInfo,                    \
     229             :     promise_thrower_finally_shared_fun)                                        \
     230             :   V(PROMISE_ALL_RESOLVE_ELEMENT_SHARED_FUN, SharedFunctionInfo,                \
     231             :     promise_all_resolve_element_shared_fun)                                    \
     232             :   V(PROMISE_PROTOTYPE_INDEX, JSObject, promise_prototype)                      \
     233             :   V(REGEXP_EXEC_FUNCTION_INDEX, JSFunction, regexp_exec_function)              \
     234             :   V(REGEXP_FUNCTION_INDEX, JSFunction, regexp_function)                        \
     235             :   V(REGEXP_LAST_MATCH_INFO_INDEX, RegExpMatchInfo, regexp_last_match_info)     \
     236             :   V(REGEXP_PROTOTYPE_MAP_INDEX, Map, regexp_prototype_map)                     \
     237             :   V(INITIAL_REGEXP_STRING_ITERATOR_PROTOTYPE_MAP_INDEX, Map,                   \
     238             :     initial_regexp_string_iterator_prototype_map)                              \
     239             :   V(REGEXP_RESULT_MAP_INDEX, Map, regexp_result_map)                           \
     240             :   V(REGEXP_PROTOTYPE_INDEX, JSObject, regexp_prototype)                        \
     241             :   V(SCRIPT_CONTEXT_TABLE_INDEX, ScriptContextTable, script_context_table)      \
     242             :   V(SECURITY_TOKEN_INDEX, Object, security_token)                              \
     243             :   V(SERIALIZED_OBJECTS, FixedArray, serialized_objects)                        \
     244             :   V(SET_VALUE_ITERATOR_MAP_INDEX, Map, set_value_iterator_map)                 \
     245             :   V(SET_KEY_VALUE_ITERATOR_MAP_INDEX, Map, set_key_value_iterator_map)         \
     246             :   V(SHARED_ARRAY_BUFFER_FUN_INDEX, JSFunction, shared_array_buffer_fun)        \
     247             :   V(SLOPPY_ARGUMENTS_MAP_INDEX, Map, sloppy_arguments_map)                     \
     248             :   V(SLOW_ALIASED_ARGUMENTS_MAP_INDEX, Map, slow_aliased_arguments_map)         \
     249             :   V(STRICT_ARGUMENTS_MAP_INDEX, Map, strict_arguments_map)                     \
     250             :   V(SLOW_OBJECT_WITH_NULL_PROTOTYPE_MAP, Map,                                  \
     251             :     slow_object_with_null_prototype_map)                                       \
     252             :   V(SLOW_OBJECT_WITH_OBJECT_PROTOTYPE_MAP, Map,                                \
     253             :     slow_object_with_object_prototype_map)                                     \
     254             :   V(SLOW_TEMPLATE_INSTANTIATIONS_CACHE_INDEX, SimpleNumberDictionary,          \
     255             :     slow_template_instantiations_cache)                                        \
     256             :   /* All *_FUNCTION_MAP_INDEX definitions used by Context::FunctionMapIndex */ \
     257             :   /* must remain together. */                                                  \
     258             :   V(SLOPPY_FUNCTION_MAP_INDEX, Map, sloppy_function_map)                       \
     259             :   V(SLOPPY_FUNCTION_WITH_NAME_MAP_INDEX, Map, sloppy_function_with_name_map)   \
     260             :   V(SLOPPY_FUNCTION_WITHOUT_PROTOTYPE_MAP_INDEX, Map,                          \
     261             :     sloppy_function_without_prototype_map)                                     \
     262             :   V(SLOPPY_FUNCTION_WITH_READONLY_PROTOTYPE_MAP_INDEX, Map,                    \
     263             :     sloppy_function_with_readonly_prototype_map)                               \
     264             :   V(STRICT_FUNCTION_MAP_INDEX, Map, strict_function_map)                       \
     265             :   V(STRICT_FUNCTION_WITH_NAME_MAP_INDEX, Map, strict_function_with_name_map)   \
     266             :   V(STRICT_FUNCTION_WITH_READONLY_PROTOTYPE_MAP_INDEX, Map,                    \
     267             :     strict_function_with_readonly_prototype_map)                               \
     268             :   V(STRICT_FUNCTION_WITHOUT_PROTOTYPE_MAP_INDEX, Map,                          \
     269             :     strict_function_without_prototype_map)                                     \
     270             :   V(METHOD_WITH_NAME_MAP_INDEX, Map, method_with_name_map)                     \
     271             :   V(METHOD_WITH_HOME_OBJECT_MAP_INDEX, Map, method_with_home_object_map)       \
     272             :   V(METHOD_WITH_NAME_AND_HOME_OBJECT_MAP_INDEX, Map,                           \
     273             :     method_with_name_and_home_object_map)                                      \
     274             :   V(ASYNC_FUNCTION_MAP_INDEX, Map, async_function_map)                         \
     275             :   V(ASYNC_FUNCTION_WITH_NAME_MAP_INDEX, Map, async_function_with_name_map)     \
     276             :   V(ASYNC_FUNCTION_WITH_HOME_OBJECT_MAP_INDEX, Map,                            \
     277             :     async_function_with_home_object_map)                                       \
     278             :   V(ASYNC_FUNCTION_WITH_NAME_AND_HOME_OBJECT_MAP_INDEX, Map,                   \
     279             :     async_function_with_name_and_home_object_map)                              \
     280             :   V(GENERATOR_FUNCTION_MAP_INDEX, Map, generator_function_map)                 \
     281             :   V(GENERATOR_FUNCTION_WITH_NAME_MAP_INDEX, Map,                               \
     282             :     generator_function_with_name_map)                                          \
     283             :   V(GENERATOR_FUNCTION_WITH_HOME_OBJECT_MAP_INDEX, Map,                        \
     284             :     generator_function_with_home_object_map)                                   \
     285             :   V(GENERATOR_FUNCTION_WITH_NAME_AND_HOME_OBJECT_MAP_INDEX, Map,               \
     286             :     generator_function_with_name_and_home_object_map)                          \
     287             :   V(ASYNC_GENERATOR_FUNCTION_MAP_INDEX, Map, async_generator_function_map)     \
     288             :   V(ASYNC_GENERATOR_FUNCTION_WITH_NAME_MAP_INDEX, Map,                         \
     289             :     async_generator_function_with_name_map)                                    \
     290             :   V(ASYNC_GENERATOR_FUNCTION_WITH_HOME_OBJECT_MAP_INDEX, Map,                  \
     291             :     async_generator_function_with_home_object_map)                             \
     292             :   V(ASYNC_GENERATOR_FUNCTION_WITH_NAME_AND_HOME_OBJECT_MAP_INDEX, Map,         \
     293             :     async_generator_function_with_name_and_home_object_map)                    \
     294             :   V(CLASS_FUNCTION_MAP_INDEX, Map, class_function_map)                         \
     295             :   V(STRING_FUNCTION_INDEX, JSFunction, string_function)                        \
     296             :   V(STRING_FUNCTION_PROTOTYPE_MAP_INDEX, Map, string_function_prototype_map)   \
     297             :   V(SYMBOL_FUNCTION_INDEX, JSFunction, symbol_function)                        \
     298             :   V(NATIVE_FUNCTION_MAP_INDEX, Map, native_function_map)                       \
     299             :   V(WASM_EXCEPTION_CONSTRUCTOR_INDEX, JSFunction, wasm_exception_constructor)  \
     300             :   V(WASM_GLOBAL_CONSTRUCTOR_INDEX, JSFunction, wasm_global_constructor)        \
     301             :   V(WASM_INSTANCE_CONSTRUCTOR_INDEX, JSFunction, wasm_instance_constructor)    \
     302             :   V(WASM_MEMORY_CONSTRUCTOR_INDEX, JSFunction, wasm_memory_constructor)        \
     303             :   V(WASM_MODULE_CONSTRUCTOR_INDEX, JSFunction, wasm_module_constructor)        \
     304             :   V(WASM_TABLE_CONSTRUCTOR_INDEX, JSFunction, wasm_table_constructor)          \
     305             :   V(TYPED_ARRAY_FUN_INDEX, JSFunction, typed_array_function)                   \
     306             :   V(TYPED_ARRAY_PROTOTYPE_INDEX, JSObject, typed_array_prototype)              \
     307             :   V(UINT16_ARRAY_FUN_INDEX, JSFunction, uint16_array_fun)                      \
     308             :   V(UINT32_ARRAY_FUN_INDEX, JSFunction, uint32_array_fun)                      \
     309             :   V(UINT8_ARRAY_FUN_INDEX, JSFunction, uint8_array_fun)                        \
     310             :   V(UINT8_CLAMPED_ARRAY_FUN_INDEX, JSFunction, uint8_clamped_array_fun)        \
     311             :   V(ARRAY_ENTRIES_ITERATOR_INDEX, JSFunction, array_entries_iterator)          \
     312             :   V(ARRAY_FOR_EACH_ITERATOR_INDEX, JSFunction, array_for_each_iterator)        \
     313             :   V(ARRAY_KEYS_ITERATOR_INDEX, JSFunction, array_keys_iterator)                \
     314             :   V(ARRAY_VALUES_ITERATOR_INDEX, JSFunction, array_values_iterator)            \
     315             :   V(ERROR_FUNCTION_INDEX, JSFunction, error_function)                          \
     316             :   V(ERROR_TO_STRING, JSFunction, error_to_string)                              \
     317             :   V(EVAL_ERROR_FUNCTION_INDEX, JSFunction, eval_error_function)                \
     318             :   V(GLOBAL_EVAL_FUN_INDEX, JSFunction, global_eval_fun)                        \
     319             :   V(GLOBAL_PROXY_FUNCTION_INDEX, JSFunction, global_proxy_function)            \
     320             :   V(MAP_DELETE_INDEX, JSFunction, map_delete)                                  \
     321             :   V(MAP_GET_INDEX, JSFunction, map_get)                                        \
     322             :   V(MAP_HAS_INDEX, JSFunction, map_has)                                        \
     323             :   V(MAP_SET_INDEX, JSFunction, map_set)                                        \
     324             :   V(FUNCTION_HAS_INSTANCE_INDEX, JSFunction, function_has_instance)            \
     325             :   V(OBJECT_TO_STRING, JSFunction, object_to_string)                            \
     326             :   V(PROMISE_ALL_INDEX, JSFunction, promise_all)                                \
     327             :   V(PROMISE_CATCH_INDEX, JSFunction, promise_catch)                            \
     328             :   V(PROMISE_FUNCTION_INDEX, JSFunction, promise_function)                      \
     329             :   V(RANGE_ERROR_FUNCTION_INDEX, JSFunction, range_error_function)              \
     330             :   V(REFERENCE_ERROR_FUNCTION_INDEX, JSFunction, reference_error_function)      \
     331             :   V(SET_ADD_INDEX, JSFunction, set_add)                                        \
     332             :   V(SET_DELETE_INDEX, JSFunction, set_delete)                                  \
     333             :   V(SET_HAS_INDEX, JSFunction, set_has)                                        \
     334             :   V(SYNTAX_ERROR_FUNCTION_INDEX, JSFunction, syntax_error_function)            \
     335             :   V(TYPE_ERROR_FUNCTION_INDEX, JSFunction, type_error_function)                \
     336             :   V(URI_ERROR_FUNCTION_INDEX, JSFunction, uri_error_function)                  \
     337             :   V(WASM_COMPILE_ERROR_FUNCTION_INDEX, JSFunction,                             \
     338             :     wasm_compile_error_function)                                               \
     339             :   V(WASM_LINK_ERROR_FUNCTION_INDEX, JSFunction, wasm_link_error_function)      \
     340             :   V(WASM_RUNTIME_ERROR_FUNCTION_INDEX, JSFunction,                             \
     341             :     wasm_runtime_error_function)                                               \
     342             :   V(WEAKMAP_SET_INDEX, JSFunction, weakmap_set)                                \
     343             :   V(WEAKMAP_GET_INDEX, JSFunction, weakmap_get)                                \
     344             :   V(WEAKSET_ADD_INDEX, JSFunction, weakset_add)                                \
     345             :   NATIVE_CONTEXT_INTRINSIC_FUNCTIONS(V)
     346             : 
     347             : // A table of all script contexts. Every loaded top-level script with top-level
     348             : // lexical declarations contributes its ScriptContext into this table.
     349             : //
     350             : // The table is a fixed array, its first slot is the current used count and
     351             : // the subsequent slots 1..used contain ScriptContexts.
     352             : class ScriptContextTable : public FixedArray {
     353             :  public:
     354             :   DECL_CAST(ScriptContextTable)
     355             : 
     356             :   struct LookupResult {
     357             :     int context_index;
     358             :     int slot_index;
     359             :     VariableMode mode;
     360             :     InitializationFlag init_flag;
     361             :     MaybeAssignedFlag maybe_assigned_flag;
     362             :   };
     363             : 
     364             :   inline int used() const;
     365             :   inline void set_used(int used);
     366             : 
     367             :   static inline Handle<Context> GetContext(Isolate* isolate,
     368             :                                            Handle<ScriptContextTable> table,
     369             :                                            int i);
     370             :   inline Context get_context(int i) const;
     371             : 
     372             :   // Lookup a variable `name` in a ScriptContextTable.
     373             :   // If it returns true, the variable is found and `result` contains
     374             :   // valid information about its location.
     375             :   // If it returns false, `result` is untouched.
     376             :   V8_WARN_UNUSED_RESULT
     377             :   static bool Lookup(Isolate* isolate, ScriptContextTable table, String name,
     378             :                      LookupResult* result);
     379             : 
     380             :   V8_WARN_UNUSED_RESULT
     381             :   static Handle<ScriptContextTable> Extend(Handle<ScriptContextTable> table,
     382             :                                            Handle<Context> script_context);
     383             : 
     384             :   static const int kUsedSlotIndex = 0;
     385             :   static const int kFirstContextSlotIndex = 1;
     386             :   static const int kMinLength = kFirstContextSlotIndex;
     387             : 
     388             :   OBJECT_CONSTRUCTORS(ScriptContextTable, FixedArray);
     389             : };
     390             : 
     391             : // JSFunctions are pairs (context, function code), sometimes also called
     392             : // closures. A Context object is used to represent function contexts and
     393             : // dynamically pushed 'with' contexts (or 'scopes' in ECMA-262 speak).
     394             : //
     395             : // At runtime, the contexts build a stack in parallel to the execution
     396             : // stack, with the top-most context being the current context. All contexts
     397             : // have the following slots:
     398             : //
     399             : // [ scope_info     ]  This is the scope info describing the current context. It
     400             : //                     contains the names of statically allocated context slots,
     401             : //                     and stack-allocated locals.  The names are needed for
     402             : //                     dynamic lookups in the presence of 'with' or 'eval', and
     403             : //                     for the debugger.
     404             : //
     405             : // [ previous       ]  A pointer to the previous context.
     406             : //
     407             : // [ extension      ]  Additional data.
     408             : //
     409             : //                     For native contexts, it contains the global object.
     410             : //                     For module contexts, it contains the module object.
     411             : //                     For await contexts, it contains the generator object.
     412             : //                     For block contexts, it may contain an "extension object".
     413             : //                     For with contexts, it contains an "extension object".
     414             : //
     415             : //                     An "extension object" is used to dynamically extend a
     416             : //                     context with additional variables, namely in the
     417             : //                     implementation of the 'with' construct and the 'eval'
     418             : //                     construct.  For instance, Context::Lookup also searches
     419             : //                     the extension object for properties.  (Storing the
     420             : //                     extension object is the original purpose of this context
     421             : //                     slot, hence the name.)
     422             : //
     423             : // [ native_context ]  A pointer to the native context.
     424             : //
     425             : // In addition, function contexts may have statically allocated context slots
     426             : // to store local variables/functions that are accessed from inner functions
     427             : // (via static context addresses) or through 'eval' (dynamic context lookups).
     428             : // The native context contains additional slots for fast access to native
     429             : // properties.
     430             : //
     431             : // Finally, with Harmony scoping, the JSFunction representing a top level
     432             : // script will have the ScriptContext rather than a FunctionContext.
     433             : // Script contexts from all top-level scripts are gathered in
     434             : // ScriptContextTable.
     435             : 
     436             : class Context : public HeapObject {
     437             :  public:
     438             :   NEVER_READ_ONLY_SPACE
     439             : 
     440             :   DECL_CAST(Context)
     441             : 
     442             :   // [length]: length of the context.
     443             :   V8_INLINE int length() const;
     444             :   V8_INLINE void set_length(int value);
     445             : 
     446             :   // Setter and getter for elements.
     447             :   V8_INLINE Object get(int index) const;
     448             :   V8_INLINE void set(int index, Object value);
     449             :   // Setter with explicit barrier mode.
     450             :   V8_INLINE void set(int index, Object value, WriteBarrierMode mode);
     451             : 
     452             :   // Layout description.
     453             : #define CONTEXT_FIELDS(V)                                             \
     454             :   V(kLengthOffset, kTaggedSize)                                       \
     455             :   /* TODO(ishell): remove this fixedArray-like header size. */        \
     456             :   V(kHeaderSize, 0)                                                   \
     457             :   V(kStartOfTaggedFieldsOffset, 0)                                    \
     458             :   V(kStartOfStrongFieldsOffset, 0)                                    \
     459             :   /* Tagged fields. */                                                \
     460             :   V(kScopeInfoOffset, kTaggedSize)                                    \
     461             :   V(kPreviousOffset, kTaggedSize)                                     \
     462             :   V(kExtensionOffset, kTaggedSize)                                    \
     463             :   V(kNativeContextOffset, kTaggedSize)                                \
     464             :   /* Header size. */                                                  \
     465             :   /* TODO(ishell): use this as header size once MIN_CONTEXT_SLOTS */  \
     466             :   /* is removed in favour of offset-based access to common fields. */ \
     467             :   V(kTodoHeaderSize, 0)
     468             : 
     469             :   DEFINE_FIELD_OFFSET_CONSTANTS(HeapObject::kHeaderSize, CONTEXT_FIELDS)
     470             : #undef CONTEXT_FIELDS
     471             : 
     472             :   // Garbage collection support.
     473             :   V8_INLINE static constexpr int SizeFor(int length) {
     474             :     // TODO(ishell): switch to kTodoHeaderSize based approach once we no longer
     475             :     // reference common Context fields via index
     476    56254753 :     return kHeaderSize + length * kTaggedSize;
     477             :   }
     478             : 
     479             :   // Code Generation support.
     480             :   // Offset of the element from the beginning of object.
     481             :   V8_INLINE static constexpr int OffsetOfElementAt(int index) {
     482             :     return SizeFor(index);
     483             :   }
     484             :   // Offset of the element from the heap object pointer.
     485             :   V8_INLINE static constexpr int SlotOffset(int index) {
     486       89772 :     return SizeFor(index) - kHeapObjectTag;
     487             :   }
     488             : 
     489             :   // TODO(ishell): eventually migrate to the offset based access instead of
     490             :   // index-based.
     491             :   // The default context slot layout; indices are FixedArray slot indices.
     492             :   enum Field {
     493             :     // TODO(shell): use offset-based approach for accessing common values.
     494             :     // These slots are in all contexts.
     495             :     SCOPE_INFO_INDEX,
     496             :     PREVIOUS_INDEX,
     497             :     EXTENSION_INDEX,
     498             :     NATIVE_CONTEXT_INDEX,
     499             : 
     500             : // These slots are only in native contexts.
     501             : #define NATIVE_CONTEXT_SLOT(index, type, name) index,
     502             :     NATIVE_CONTEXT_FIELDS(NATIVE_CONTEXT_SLOT)
     503             : #undef NATIVE_CONTEXT_SLOT
     504             : 
     505             :     // Properties from here are treated as weak references by the full GC.
     506             :     // Scavenge treats them as strong references.
     507             :     OPTIMIZED_CODE_LIST,    // Weak.
     508             :     DEOPTIMIZED_CODE_LIST,  // Weak.
     509             :     NEXT_CONTEXT_LINK,      // Weak.
     510             : 
     511             :     // Total number of slots.
     512             :     NATIVE_CONTEXT_SLOTS,
     513             :     FIRST_WEAK_SLOT = OPTIMIZED_CODE_LIST,
     514             :     FIRST_JS_ARRAY_MAP_SLOT = JS_ARRAY_PACKED_SMI_ELEMENTS_MAP_INDEX,
     515             : 
     516             :     // TODO(shell): Remove, once it becomes zero
     517             :     MIN_CONTEXT_SLOTS = GLOBAL_PROXY_INDEX,
     518             : 
     519             :     // This slot holds the thrown value in catch contexts.
     520             :     THROWN_OBJECT_INDEX = MIN_CONTEXT_SLOTS,
     521             : 
     522             :     // These slots hold values in debug evaluate contexts.
     523             :     WRAPPED_CONTEXT_INDEX = MIN_CONTEXT_SLOTS,
     524             :     WHITE_LIST_INDEX = MIN_CONTEXT_SLOTS + 1
     525             :   };
     526             : 
     527             :   // A region of native context entries containing maps for functions created
     528             :   // by Builtins::kFastNewClosure.
     529             :   static const int FIRST_FUNCTION_MAP_INDEX = SLOPPY_FUNCTION_MAP_INDEX;
     530             :   static const int LAST_FUNCTION_MAP_INDEX = CLASS_FUNCTION_MAP_INDEX;
     531             : 
     532             :   static const int kNoContext = 0;
     533             :   static const int kInvalidContext = 1;
     534             : 
     535             :   void ResetErrorsThrown();
     536             :   void IncrementErrorsThrown();
     537             :   int GetErrorsThrown();
     538             : 
     539             :   // Direct slot access.
     540             :   inline void set_scope_info(ScopeInfo scope_info);
     541             :   inline Context previous();
     542             :   inline void set_previous(Context context);
     543             : 
     544             :   inline Object next_context_link();
     545             : 
     546             :   inline bool has_extension();
     547             :   inline HeapObject extension();
     548             :   inline void set_extension(HeapObject object);
     549             :   JSObject extension_object();
     550             :   JSReceiver extension_receiver();
     551             :   ScopeInfo scope_info();
     552             : 
     553             :   // Find the module context (assuming there is one) and return the associated
     554             :   // module object.
     555             :   Module module();
     556             : 
     557             :   // Get the context where var declarations will be hoisted to, which
     558             :   // may be the context itself.
     559             :   Context declaration_context();
     560             :   bool is_declaration_context();
     561             : 
     562             :   // Get the next closure's context on the context chain.
     563             :   Context closure_context();
     564             : 
     565             :   // Returns a JSGlobalProxy object or null.
     566             :   JSGlobalProxy global_proxy();
     567             :   void set_global_proxy(JSGlobalProxy global);
     568             : 
     569             :   // Get the JSGlobalObject object.
     570             :   V8_EXPORT_PRIVATE JSGlobalObject global_object();
     571             : 
     572             :   // Get the script context by traversing the context chain.
     573             :   Context script_context();
     574             : 
     575             :   // Compute the native context.
     576             :   inline NativeContext native_context() const;
     577             :   inline void set_native_context(NativeContext context);
     578             : 
     579             :   // Predicates for context types.  IsNativeContext is already defined on
     580             :   // Object.
     581             :   inline bool IsFunctionContext() const;
     582             :   inline bool IsCatchContext() const;
     583             :   inline bool IsWithContext() const;
     584             :   inline bool IsDebugEvaluateContext() const;
     585             :   inline bool IsAwaitContext() const;
     586             :   inline bool IsBlockContext() const;
     587             :   inline bool IsModuleContext() const;
     588             :   inline bool IsEvalContext() const;
     589             :   inline bool IsScriptContext() const;
     590             : 
     591             :   inline bool HasSameSecurityTokenAs(Context that) const;
     592             : 
     593             :   // The native context also stores a list of all optimized code and a
     594             :   // list of all deoptimized code, which are needed by the deoptimizer.
     595             :   void AddOptimizedCode(Code code);
     596             :   void SetOptimizedCodeListHead(Object head);
     597             :   Object OptimizedCodeListHead();
     598             :   void SetDeoptimizedCodeListHead(Object head);
     599             :   Object DeoptimizedCodeListHead();
     600             : 
     601             :   Handle<Object> ErrorMessageForCodeGenerationFromStrings();
     602             : 
     603             :   static int IntrinsicIndexForName(Handle<String> name);
     604             :   static int IntrinsicIndexForName(const unsigned char* name, int length);
     605             : 
     606             : #define NATIVE_CONTEXT_FIELD_ACCESSORS(index, type, name) \
     607             :   inline void set_##name(type value);                     \
     608             :   inline bool is_##name(type value) const;                \
     609             :   inline type name() const;
     610             :   NATIVE_CONTEXT_FIELDS(NATIVE_CONTEXT_FIELD_ACCESSORS)
     611             : #undef NATIVE_CONTEXT_FIELD_ACCESSORS
     612             : 
     613             :   // Lookup the slot called name, starting with the current context.
     614             :   // There are three possibilities:
     615             :   //
     616             :   // 1) result->IsContext():
     617             :   //    The binding was found in a context.  *index is always the
     618             :   //    non-negative slot index.  *attributes is NONE for var and let
     619             :   //    declarations, READ_ONLY for const declarations (never ABSENT).
     620             :   //
     621             :   // 2) result->IsJSObject():
     622             :   //    The binding was found as a named property in a context extension
     623             :   //    object (i.e., was introduced via eval), as a property on the subject
     624             :   //    of with, or as a property of the global object.  *index is -1 and
     625             :   //    *attributes is not ABSENT.
     626             :   //
     627             :   // 3) result->IsModule():
     628             :   //    The binding was found in module imports or exports.
     629             :   //     *attributes is never ABSENT. imports are READ_ONLY.
     630             :   //
     631             :   // 4) result.is_null():
     632             :   //    There was no binding found, *index is always -1 and *attributes is
     633             :   //    always ABSENT.
     634             :   static Handle<Object> Lookup(Handle<Context> context, Handle<String> name,
     635             :                                ContextLookupFlags flags, int* index,
     636             :                                PropertyAttributes* attributes,
     637             :                                InitializationFlag* init_flag,
     638             :                                VariableMode* variable_mode,
     639             :                                bool* is_sloppy_function_name = nullptr);
     640             : 
     641             :   static inline int FunctionMapIndex(LanguageMode language_mode,
     642             :                                      FunctionKind kind, bool has_shared_name,
     643             :                                      bool needs_home_object);
     644             : 
     645        9968 :   static int ArrayMapIndex(ElementsKind elements_kind) {
     646             :     DCHECK(IsFastElementsKind(elements_kind));
     647     3165025 :     return elements_kind + FIRST_JS_ARRAY_MAP_SLOT;
     648             :   }
     649             : 
     650             :   inline Map GetInitialJSArrayMap(ElementsKind kind) const;
     651             : 
     652             :   static const int kNotFound = -1;
     653             : 
     654             :   // Dispatched behavior.
     655             :   DECL_PRINTER(Context)
     656             :   DECL_VERIFIER(Context)
     657             : 
     658             :   typedef FlexibleBodyDescriptor<kStartOfTaggedFieldsOffset> BodyDescriptor;
     659             : 
     660             :  private:
     661             : #ifdef DEBUG
     662             :   // Bootstrapping-aware type checks.
     663             :   V8_EXPORT_PRIVATE static bool IsBootstrappingOrNativeContext(Isolate* isolate,
     664             :                                                                Object object);
     665             :   static bool IsBootstrappingOrValidParentContext(Object object, Context kid);
     666             : #endif
     667             : 
     668    12123222 :   OBJECT_CONSTRUCTORS(Context, HeapObject);
     669             : };
     670             : 
     671             : class NativeContext : public Context {
     672             :  public:
     673             :   DECL_CAST(NativeContext)
     674             :   // TODO(neis): Move some stuff from Context here.
     675             : 
     676             :   // [microtask_queue]: pointer to the MicrotaskQueue object.
     677             :   DECL_PRIMITIVE_ACCESSORS(microtask_queue, MicrotaskQueue*)
     678             : 
     679             :   // Dispatched behavior.
     680             :   DECL_PRINTER(NativeContext)
     681             :   DECL_VERIFIER(NativeContext)
     682             : 
     683             :   // Layout description.
     684             : #define NATIVE_CONTEXT_FIELDS_DEF(V)                                        \
     685             :   /* TODO(ishell): move definition of common context offsets to Context. */ \
     686             :   V(kStartOfNativeContextFieldsOffset,                                      \
     687             :     (FIRST_WEAK_SLOT - MIN_CONTEXT_SLOTS) * kTaggedSize)                    \
     688             :   V(kEndOfStrongFieldsOffset, 0)                                            \
     689             :   V(kStartOfWeakFieldsOffset,                                               \
     690             :     (NATIVE_CONTEXT_SLOTS - FIRST_WEAK_SLOT) * kTaggedSize)                 \
     691             :   V(kEndOfWeakFieldsOffset, 0)                                              \
     692             :   V(kEndOfNativeContextFieldsOffset, 0)                                     \
     693             :   V(kEndOfTaggedFieldsOffset, 0)                                            \
     694             :   /* Raw data. */                                                           \
     695             :   V(kMicrotaskQueueOffset, kSystemPointerSize)                              \
     696             :   /* Total size. */                                                         \
     697             :   V(kSize, 0)
     698             : 
     699             :   DEFINE_FIELD_OFFSET_CONSTANTS(Context::kTodoHeaderSize,
     700             :                                 NATIVE_CONTEXT_FIELDS_DEF)
     701             : #undef NATIVE_CONTEXT_FIELDS_DEF
     702             : 
     703             :   class BodyDescriptor;
     704             : 
     705             :  private:
     706             :   STATIC_ASSERT(OffsetOfElementAt(EMBEDDER_DATA_INDEX) ==
     707             :                 Internals::kNativeContextEmbedderDataOffset);
     708             : 
     709     2677618 :   OBJECT_CONSTRUCTORS(NativeContext, Context);
     710             : };
     711             : 
     712             : typedef Context::Field ContextField;
     713             : 
     714             : }  // namespace internal
     715             : }  // namespace v8
     716             : 
     717             : #include "src/objects/object-macros-undef.h"
     718             : 
     719             : #endif  // V8_CONTEXTS_H_

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