LCOV - code coverage report
Current view: top level - src - contexts.h (source / functions) Hit Total Coverage
Test: app.info Lines: 5 5 100.0 %
Date: 2019-01-20 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/objects/fixed-array.h"
       9             : 
      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(REGEXP_INTERNAL_MATCH, JSFunction, regexp_internal_match)           \
      58             :   V(REFLECT_APPLY_INDEX, JSFunction, reflect_apply)                     \
      59             :   V(REFLECT_CONSTRUCT_INDEX, JSFunction, reflect_construct)             \
      60             :   V(REFLECT_DEFINE_PROPERTY_INDEX, JSFunction, reflect_define_property) \
      61             :   V(REFLECT_DELETE_PROPERTY_INDEX, JSFunction, reflect_delete_property) \
      62             :   V(MATH_FLOOR_INDEX, JSFunction, math_floor)                           \
      63             :   V(MATH_POW_INDEX, JSFunction, math_pow)                               \
      64             :   V(NEW_PROMISE_CAPABILITY_INDEX, JSFunction, new_promise_capability)   \
      65             :   V(PROMISE_INTERNAL_CONSTRUCTOR_INDEX, JSFunction,                     \
      66             :     promise_internal_constructor)                                       \
      67             :   V(IS_PROMISE_INDEX, JSFunction, is_promise)                           \
      68             :   V(PROMISE_THEN_INDEX, JSFunction, promise_then)
      69             : 
      70             : #define NATIVE_CONTEXT_FIELDS(V)                                               \
      71             :   V(GLOBAL_PROXY_INDEX, JSGlobalProxy, global_proxy_object)                    \
      72             :   /* TODO(ishell): Actually we store exactly EmbedderDataArray here but */     \
      73             :   /* it's already UBSan-fiendly and doesn't require a star... So declare */    \
      74             :   /* it as a HeapObject for now. */                                            \
      75             :   V(EMBEDDER_DATA_INDEX, HeapObject, embedder_data)                            \
      76             :   /* Below is alpha-sorted */                                                  \
      77             :   V(ACCESSOR_PROPERTY_DESCRIPTOR_MAP_INDEX, Map,                               \
      78             :     accessor_property_descriptor_map)                                          \
      79             :   V(ALLOW_CODE_GEN_FROM_STRINGS_INDEX, Object, allow_code_gen_from_strings)    \
      80             :   V(ARRAY_BUFFER_FUN_INDEX, JSFunction, array_buffer_fun)                      \
      81             :   V(ARRAY_BUFFER_MAP_INDEX, Map, array_buffer_map)                             \
      82             :   V(ARRAY_BUFFER_NOINIT_FUN_INDEX, JSFunction, array_buffer_noinit_fun)        \
      83             :   V(ARRAY_FUNCTION_INDEX, JSFunction, array_function)                          \
      84             :   V(ARRAY_JOIN_STACK_INDEX, HeapObject, array_join_stack)                      \
      85             :   V(ASYNC_FROM_SYNC_ITERATOR_MAP_INDEX, Map, async_from_sync_iterator_map)     \
      86             :   V(ASYNC_FUNCTION_AWAIT_REJECT_SHARED_FUN, SharedFunctionInfo,                \
      87             :     async_function_await_reject_shared_fun)                                    \
      88             :   V(ASYNC_FUNCTION_AWAIT_RESOLVE_SHARED_FUN, SharedFunctionInfo,               \
      89             :     async_function_await_resolve_shared_fun)                                   \
      90             :   V(ASYNC_FUNCTION_FUNCTION_INDEX, JSFunction, async_function_constructor)     \
      91             :   V(ASYNC_FUNCTION_OBJECT_MAP_INDEX, Map, async_function_object_map)           \
      92             :   V(ASYNC_GENERATOR_FUNCTION_FUNCTION_INDEX, JSFunction,                       \
      93             :     async_generator_function_function)                                         \
      94             :   V(ASYNC_ITERATOR_VALUE_UNWRAP_SHARED_FUN, SharedFunctionInfo,                \
      95             :     async_iterator_value_unwrap_shared_fun)                                    \
      96             :   V(ASYNC_GENERATOR_AWAIT_REJECT_SHARED_FUN, SharedFunctionInfo,               \
      97             :     async_generator_await_reject_shared_fun)                                   \
      98             :   V(ASYNC_GENERATOR_AWAIT_RESOLVE_SHARED_FUN, SharedFunctionInfo,              \
      99             :     async_generator_await_resolve_shared_fun)                                  \
     100             :   V(ASYNC_GENERATOR_YIELD_RESOLVE_SHARED_FUN, SharedFunctionInfo,              \
     101             :     async_generator_yield_resolve_shared_fun)                                  \
     102             :   V(ASYNC_GENERATOR_RETURN_RESOLVE_SHARED_FUN, SharedFunctionInfo,             \
     103             :     async_generator_return_resolve_shared_fun)                                 \
     104             :   V(ASYNC_GENERATOR_RETURN_CLOSED_RESOLVE_SHARED_FUN, SharedFunctionInfo,      \
     105             :     async_generator_return_closed_resolve_shared_fun)                          \
     106             :   V(ASYNC_GENERATOR_RETURN_CLOSED_REJECT_SHARED_FUN, SharedFunctionInfo,       \
     107             :     async_generator_return_closed_reject_shared_fun)                           \
     108             :   V(ATOMICS_OBJECT, JSObject, atomics_object)                                  \
     109             :   V(BIGINT_FUNCTION_INDEX, JSFunction, bigint_function)                        \
     110             :   V(BIGINT64_ARRAY_FUN_INDEX, JSFunction, bigint64_array_fun)                  \
     111             :   V(BIGUINT64_ARRAY_FUN_INDEX, JSFunction, biguint64_array_fun)                \
     112             :   V(BOOLEAN_FUNCTION_INDEX, JSFunction, boolean_function)                      \
     113             :   V(BOUND_FUNCTION_WITH_CONSTRUCTOR_MAP_INDEX, Map,                            \
     114             :     bound_function_with_constructor_map)                                       \
     115             :   V(BOUND_FUNCTION_WITHOUT_CONSTRUCTOR_MAP_INDEX, Map,                         \
     116             :     bound_function_without_constructor_map)                                    \
     117             :   V(CALL_AS_CONSTRUCTOR_DELEGATE_INDEX, JSFunction,                            \
     118             :     call_as_constructor_delegate)                                              \
     119             :   V(CALL_AS_FUNCTION_DELEGATE_INDEX, JSFunction, call_as_function_delegate)    \
     120             :   V(CALLSITE_FUNCTION_INDEX, JSFunction, callsite_function)                    \
     121             :   V(CONTEXT_EXTENSION_FUNCTION_INDEX, JSFunction, context_extension_function)  \
     122             :   V(DATA_PROPERTY_DESCRIPTOR_MAP_INDEX, Map, data_property_descriptor_map)     \
     123             :   V(DATA_VIEW_FUN_INDEX, JSFunction, data_view_fun)                            \
     124             :   V(DATE_FUNCTION_INDEX, JSFunction, date_function)                            \
     125             :   V(DEBUG_CONTEXT_ID_INDEX, Object, debug_context_id)                          \
     126             :   V(EMPTY_FUNCTION_INDEX, JSFunction, empty_function)                          \
     127             :   V(ERROR_MESSAGE_FOR_CODE_GEN_FROM_STRINGS_INDEX, Object,                     \
     128             :     error_message_for_code_gen_from_strings)                                   \
     129             :   V(ERRORS_THROWN_INDEX, Smi, errors_thrown)                                   \
     130             :   V(EXTRAS_EXPORTS_OBJECT_INDEX, JSObject, extras_binding_object)              \
     131             :   V(EXTRAS_UTILS_OBJECT_INDEX, Object, extras_utils_object)                    \
     132             :   V(FAST_ALIASED_ARGUMENTS_MAP_INDEX, Map, fast_aliased_arguments_map)         \
     133             :   V(FAST_TEMPLATE_INSTANTIATIONS_CACHE_INDEX, FixedArray,                      \
     134             :     fast_template_instantiations_cache)                                        \
     135             :   V(FLOAT32_ARRAY_FUN_INDEX, JSFunction, float32_array_fun)                    \
     136             :   V(FLOAT64_ARRAY_FUN_INDEX, JSFunction, float64_array_fun)                    \
     137             :   V(FUNCTION_FUNCTION_INDEX, JSFunction, function_function)                    \
     138             :   V(GENERATOR_FUNCTION_FUNCTION_INDEX, JSFunction,                             \
     139             :     generator_function_function)                                               \
     140             :   V(GENERATOR_OBJECT_PROTOTYPE_MAP_INDEX, Map, generator_object_prototype_map) \
     141             :   V(ASYNC_GENERATOR_OBJECT_PROTOTYPE_MAP_INDEX, Map,                           \
     142             :     async_generator_object_prototype_map)                                      \
     143             :   V(INITIAL_ARRAY_ITERATOR_MAP_INDEX, Map, initial_array_iterator_map)         \
     144             :   V(INITIAL_ARRAY_ITERATOR_PROTOTYPE_INDEX, JSObject,                          \
     145             :     initial_array_iterator_prototype)                                          \
     146             :   V(INITIAL_ARRAY_PROTOTYPE_INDEX, JSObject, initial_array_prototype)          \
     147             :   V(INITIAL_ERROR_PROTOTYPE_INDEX, JSObject, initial_error_prototype)          \
     148             :   V(INITIAL_GENERATOR_PROTOTYPE_INDEX, JSObject, initial_generator_prototype)  \
     149             :   V(INITIAL_ASYNC_GENERATOR_PROTOTYPE_INDEX, JSObject,                         \
     150             :     initial_async_generator_prototype)                                         \
     151             :   V(INITIAL_ITERATOR_PROTOTYPE_INDEX, JSObject, initial_iterator_prototype)    \
     152             :   V(INITIAL_MAP_ITERATOR_PROTOTYPE_INDEX, JSObject,                            \
     153             :     initial_map_iterator_prototype)                                            \
     154             :   V(INITIAL_MAP_PROTOTYPE_MAP_INDEX, Map, initial_map_prototype_map)           \
     155             :   V(INITIAL_OBJECT_PROTOTYPE_INDEX, JSObject, initial_object_prototype)        \
     156             :   V(INITIAL_SET_ITERATOR_PROTOTYPE_INDEX, JSObject,                            \
     157             :     initial_set_iterator_prototype)                                            \
     158             :   V(INITIAL_SET_PROTOTYPE_INDEX, JSObject, initial_set_prototype)              \
     159             :   V(INITIAL_SET_PROTOTYPE_MAP_INDEX, Map, initial_set_prototype_map)           \
     160             :   V(INITIAL_STRING_ITERATOR_MAP_INDEX, Map, initial_string_iterator_map)       \
     161             :   V(INITIAL_STRING_ITERATOR_PROTOTYPE_INDEX, JSObject,                         \
     162             :     initial_string_iterator_prototype)                                         \
     163             :   V(INITIAL_STRING_PROTOTYPE_INDEX, JSObject, initial_string_prototype)        \
     164             :   V(INITIAL_WEAKMAP_PROTOTYPE_MAP_INDEX, Map, initial_weakmap_prototype_map)   \
     165             :   V(INITIAL_WEAKSET_PROTOTYPE_MAP_INDEX, Map, initial_weakset_prototype_map)   \
     166             :   V(INT16_ARRAY_FUN_INDEX, JSFunction, int16_array_fun)                        \
     167             :   V(INT32_ARRAY_FUN_INDEX, JSFunction, int32_array_fun)                        \
     168             :   V(INT8_ARRAY_FUN_INDEX, JSFunction, int8_array_fun)                          \
     169             :   V(INTL_COLLATOR_FUNCTION_INDEX, JSFunction, intl_collator_function)          \
     170             :   V(INTL_DATE_TIME_FORMAT_FUNCTION_INDEX, JSFunction,                          \
     171             :     intl_date_time_format_function)                                            \
     172             :   V(INTL_NUMBER_FORMAT_FUNCTION_INDEX, JSFunction,                             \
     173             :     intl_number_format_function)                                               \
     174             :   V(INTL_LOCALE_FUNCTION_INDEX, JSFunction, intl_locale_function)              \
     175             :   V(INTL_SEGMENT_ITERATOR_MAP_INDEX, Map, intl_segment_iterator_map)           \
     176             :   V(ITERATOR_RESULT_MAP_INDEX, Map, iterator_result_map)                       \
     177             :   V(JS_ARRAY_PACKED_SMI_ELEMENTS_MAP_INDEX, Map,                               \
     178             :     js_array_packed_smi_elements_map)                                          \
     179             :   V(JS_ARRAY_HOLEY_SMI_ELEMENTS_MAP_INDEX, Map,                                \
     180             :     js_array_holey_smi_elements_map)                                           \
     181             :   V(JS_ARRAY_PACKED_ELEMENTS_MAP_INDEX, Map, js_array_packed_elements_map)     \
     182             :   V(JS_ARRAY_HOLEY_ELEMENTS_MAP_INDEX, Map, js_array_holey_elements_map)       \
     183             :   V(JS_ARRAY_PACKED_DOUBLE_ELEMENTS_MAP_INDEX, Map,                            \
     184             :     js_array_packed_double_elements_map)                                       \
     185             :   V(JS_ARRAY_HOLEY_DOUBLE_ELEMENTS_MAP_INDEX, Map,                             \
     186             :     js_array_holey_double_elements_map)                                        \
     187             :   V(JS_MAP_FUN_INDEX, JSFunction, js_map_fun)                                  \
     188             :   V(JS_MAP_MAP_INDEX, Map, js_map_map)                                         \
     189             :   V(JS_MODULE_NAMESPACE_MAP, Map, js_module_namespace_map)                     \
     190             :   V(JS_SET_FUN_INDEX, JSFunction, js_set_fun)                                  \
     191             :   V(JS_SET_MAP_INDEX, Map, js_set_map)                                         \
     192             :   V(JS_WEAK_CELL_MAP_INDEX, Map, js_weak_cell_map)                             \
     193             :   V(JS_WEAK_FACTORY_CLEANUP_ITERATOR_MAP_INDEX, Map,                           \
     194             :     js_weak_factory_cleanup_iterator_map)                                      \
     195             :   V(JS_WEAK_MAP_FUN_INDEX, JSFunction, js_weak_map_fun)                        \
     196             :   V(JS_WEAK_REF_MAP_INDEX, Map, js_weak_ref_map)                               \
     197             :   V(JS_WEAK_SET_FUN_INDEX, JSFunction, js_weak_set_fun)                        \
     198             :   V(MAP_CACHE_INDEX, Object, map_cache)                                        \
     199             :   V(MAP_KEY_ITERATOR_MAP_INDEX, Map, map_key_iterator_map)                     \
     200             :   V(MAP_KEY_VALUE_ITERATOR_MAP_INDEX, Map, map_key_value_iterator_map)         \
     201             :   V(MAP_VALUE_ITERATOR_MAP_INDEX, Map, map_value_iterator_map)                 \
     202             :   V(MATH_RANDOM_INDEX_INDEX, Smi, math_random_index)                           \
     203             :   V(MATH_RANDOM_STATE_INDEX, ByteArray, math_random_state)                     \
     204             :   V(MATH_RANDOM_CACHE_INDEX, FixedDoubleArray, math_random_cache)              \
     205             :   V(MESSAGE_LISTENERS_INDEX, TemplateList, message_listeners)                  \
     206             :   V(NORMALIZED_MAP_CACHE_INDEX, Object, normalized_map_cache)                  \
     207             :   V(NUMBER_FUNCTION_INDEX, JSFunction, number_function)                        \
     208             :   V(OBJECT_FUNCTION_INDEX, JSFunction, object_function)                        \
     209             :   V(OBJECT_FUNCTION_PROTOTYPE_MAP_INDEX, Map, object_function_prototype_map)   \
     210             :   V(OPAQUE_REFERENCE_FUNCTION_INDEX, JSFunction, opaque_reference_function)    \
     211             :   V(PROXY_CALLABLE_MAP_INDEX, Map, proxy_callable_map)                         \
     212             :   V(PROXY_CONSTRUCTOR_MAP_INDEX, Map, proxy_constructor_map)                   \
     213             :   V(PROXY_FUNCTION_INDEX, JSFunction, proxy_function)                          \
     214             :   V(PROXY_MAP_INDEX, Map, proxy_map)                                           \
     215             :   V(PROXY_REVOCABLE_RESULT_MAP_INDEX, Map, proxy_revocable_result_map)         \
     216             :   V(PROXY_REVOKE_SHARED_FUN, SharedFunctionInfo, proxy_revoke_shared_fun)      \
     217             :   V(PROMISE_GET_CAPABILITIES_EXECUTOR_SHARED_FUN, SharedFunctionInfo,          \
     218             :     promise_get_capabilities_executor_shared_fun)                              \
     219             :   V(PROMISE_CAPABILITY_DEFAULT_REJECT_SHARED_FUN_INDEX, SharedFunctionInfo,    \
     220             :     promise_capability_default_reject_shared_fun)                              \
     221             :   V(PROMISE_CAPABILITY_DEFAULT_RESOLVE_SHARED_FUN_INDEX, SharedFunctionInfo,   \
     222             :     promise_capability_default_resolve_shared_fun)                             \
     223             :   V(PROMISE_THEN_FINALLY_SHARED_FUN, SharedFunctionInfo,                       \
     224             :     promise_then_finally_shared_fun)                                           \
     225             :   V(PROMISE_CATCH_FINALLY_SHARED_FUN, SharedFunctionInfo,                      \
     226             :     promise_catch_finally_shared_fun)                                          \
     227             :   V(PROMISE_VALUE_THUNK_FINALLY_SHARED_FUN, SharedFunctionInfo,                \
     228             :     promise_value_thunk_finally_shared_fun)                                    \
     229             :   V(PROMISE_THROWER_FINALLY_SHARED_FUN, SharedFunctionInfo,                    \
     230             :     promise_thrower_finally_shared_fun)                                        \
     231             :   V(PROMISE_ALL_RESOLVE_ELEMENT_SHARED_FUN, SharedFunctionInfo,                \
     232             :     promise_all_resolve_element_shared_fun)                                    \
     233             :   V(PROMISE_PROTOTYPE_INDEX, JSObject, promise_prototype)                      \
     234             :   V(REGEXP_EXEC_FUNCTION_INDEX, JSFunction, regexp_exec_function)              \
     235             :   V(REGEXP_FUNCTION_INDEX, JSFunction, regexp_function)                        \
     236             :   V(REGEXP_LAST_MATCH_INFO_INDEX, RegExpMatchInfo, regexp_last_match_info)     \
     237             :   V(REGEXP_INTERNAL_MATCH_INFO_INDEX, RegExpMatchInfo,                         \
     238             :     regexp_internal_match_info)                                                \
     239             :   V(REGEXP_PROTOTYPE_MAP_INDEX, Map, regexp_prototype_map)                     \
     240             :   V(INITIAL_REGEXP_STRING_ITERATOR_PROTOTYPE_MAP_INDEX, Map,                   \
     241             :     initial_regexp_string_iterator_prototype_map)                              \
     242             :   V(REGEXP_RESULT_MAP_INDEX, Map, regexp_result_map)                           \
     243             :   V(REGEXP_PROTOTYPE_INDEX, JSObject, regexp_prototype)                        \
     244             :   V(SCRIPT_CONTEXT_TABLE_INDEX, ScriptContextTable, script_context_table)      \
     245             :   V(SECURITY_TOKEN_INDEX, Object, security_token)                              \
     246             :   V(SERIALIZED_OBJECTS, FixedArray, serialized_objects)                        \
     247             :   V(SET_VALUE_ITERATOR_MAP_INDEX, Map, set_value_iterator_map)                 \
     248             :   V(SET_KEY_VALUE_ITERATOR_MAP_INDEX, Map, set_key_value_iterator_map)         \
     249             :   V(SHARED_ARRAY_BUFFER_FUN_INDEX, JSFunction, shared_array_buffer_fun)        \
     250             :   V(SLOPPY_ARGUMENTS_MAP_INDEX, Map, sloppy_arguments_map)                     \
     251             :   V(SLOW_ALIASED_ARGUMENTS_MAP_INDEX, Map, slow_aliased_arguments_map)         \
     252             :   V(STRICT_ARGUMENTS_MAP_INDEX, Map, strict_arguments_map)                     \
     253             :   V(SLOW_OBJECT_WITH_NULL_PROTOTYPE_MAP, Map,                                  \
     254             :     slow_object_with_null_prototype_map)                                       \
     255             :   V(SLOW_OBJECT_WITH_OBJECT_PROTOTYPE_MAP, Map,                                \
     256             :     slow_object_with_object_prototype_map)                                     \
     257             :   V(SLOW_TEMPLATE_INSTANTIATIONS_CACHE_INDEX, SimpleNumberDictionary,          \
     258             :     slow_template_instantiations_cache)                                        \
     259             :   /* All *_FUNCTION_MAP_INDEX definitions used by Context::FunctionMapIndex */ \
     260             :   /* must remain together. */                                                  \
     261             :   V(SLOPPY_FUNCTION_MAP_INDEX, Map, sloppy_function_map)                       \
     262             :   V(SLOPPY_FUNCTION_WITH_NAME_MAP_INDEX, Map, sloppy_function_with_name_map)   \
     263             :   V(SLOPPY_FUNCTION_WITHOUT_PROTOTYPE_MAP_INDEX, Map,                          \
     264             :     sloppy_function_without_prototype_map)                                     \
     265             :   V(SLOPPY_FUNCTION_WITH_READONLY_PROTOTYPE_MAP_INDEX, Map,                    \
     266             :     sloppy_function_with_readonly_prototype_map)                               \
     267             :   V(STRICT_FUNCTION_MAP_INDEX, Map, strict_function_map)                       \
     268             :   V(STRICT_FUNCTION_WITH_NAME_MAP_INDEX, Map, strict_function_with_name_map)   \
     269             :   V(STRICT_FUNCTION_WITH_READONLY_PROTOTYPE_MAP_INDEX, Map,                    \
     270             :     strict_function_with_readonly_prototype_map)                               \
     271             :   V(STRICT_FUNCTION_WITHOUT_PROTOTYPE_MAP_INDEX, Map,                          \
     272             :     strict_function_without_prototype_map)                                     \
     273             :   V(METHOD_WITH_NAME_MAP_INDEX, Map, method_with_name_map)                     \
     274             :   V(METHOD_WITH_HOME_OBJECT_MAP_INDEX, Map, method_with_home_object_map)       \
     275             :   V(METHOD_WITH_NAME_AND_HOME_OBJECT_MAP_INDEX, Map,                           \
     276             :     method_with_name_and_home_object_map)                                      \
     277             :   V(ASYNC_FUNCTION_MAP_INDEX, Map, async_function_map)                         \
     278             :   V(ASYNC_FUNCTION_WITH_NAME_MAP_INDEX, Map, async_function_with_name_map)     \
     279             :   V(ASYNC_FUNCTION_WITH_HOME_OBJECT_MAP_INDEX, Map,                            \
     280             :     async_function_with_home_object_map)                                       \
     281             :   V(ASYNC_FUNCTION_WITH_NAME_AND_HOME_OBJECT_MAP_INDEX, Map,                   \
     282             :     async_function_with_name_and_home_object_map)                              \
     283             :   V(GENERATOR_FUNCTION_MAP_INDEX, Map, generator_function_map)                 \
     284             :   V(GENERATOR_FUNCTION_WITH_NAME_MAP_INDEX, Map,                               \
     285             :     generator_function_with_name_map)                                          \
     286             :   V(GENERATOR_FUNCTION_WITH_HOME_OBJECT_MAP_INDEX, Map,                        \
     287             :     generator_function_with_home_object_map)                                   \
     288             :   V(GENERATOR_FUNCTION_WITH_NAME_AND_HOME_OBJECT_MAP_INDEX, Map,               \
     289             :     generator_function_with_name_and_home_object_map)                          \
     290             :   V(ASYNC_GENERATOR_FUNCTION_MAP_INDEX, Map, async_generator_function_map)     \
     291             :   V(ASYNC_GENERATOR_FUNCTION_WITH_NAME_MAP_INDEX, Map,                         \
     292             :     async_generator_function_with_name_map)                                    \
     293             :   V(ASYNC_GENERATOR_FUNCTION_WITH_HOME_OBJECT_MAP_INDEX, Map,                  \
     294             :     async_generator_function_with_home_object_map)                             \
     295             :   V(ASYNC_GENERATOR_FUNCTION_WITH_NAME_AND_HOME_OBJECT_MAP_INDEX, Map,         \
     296             :     async_generator_function_with_name_and_home_object_map)                    \
     297             :   V(CLASS_FUNCTION_MAP_INDEX, Map, class_function_map)                         \
     298             :   V(STRING_FUNCTION_INDEX, JSFunction, string_function)                        \
     299             :   V(STRING_FUNCTION_PROTOTYPE_MAP_INDEX, Map, string_function_prototype_map)   \
     300             :   V(SYMBOL_FUNCTION_INDEX, JSFunction, symbol_function)                        \
     301             :   V(NATIVE_FUNCTION_MAP_INDEX, Map, native_function_map)                       \
     302             :   V(WASM_EXCEPTION_CONSTRUCTOR_INDEX, JSFunction, wasm_exception_constructor)  \
     303             :   V(WASM_GLOBAL_CONSTRUCTOR_INDEX, JSFunction, wasm_global_constructor)        \
     304             :   V(WASM_INSTANCE_CONSTRUCTOR_INDEX, JSFunction, wasm_instance_constructor)    \
     305             :   V(WASM_MEMORY_CONSTRUCTOR_INDEX, JSFunction, wasm_memory_constructor)        \
     306             :   V(WASM_MODULE_CONSTRUCTOR_INDEX, JSFunction, wasm_module_constructor)        \
     307             :   V(WASM_TABLE_CONSTRUCTOR_INDEX, JSFunction, wasm_table_constructor)          \
     308             :   V(TYPED_ARRAY_FUN_INDEX, JSFunction, typed_array_function)                   \
     309             :   V(TYPED_ARRAY_PROTOTYPE_INDEX, JSObject, typed_array_prototype)              \
     310             :   V(UINT16_ARRAY_FUN_INDEX, JSFunction, uint16_array_fun)                      \
     311             :   V(UINT32_ARRAY_FUN_INDEX, JSFunction, uint32_array_fun)                      \
     312             :   V(UINT8_ARRAY_FUN_INDEX, JSFunction, uint8_array_fun)                        \
     313             :   V(UINT8_CLAMPED_ARRAY_FUN_INDEX, JSFunction, uint8_clamped_array_fun)        \
     314             :   V(ARRAY_ENTRIES_ITERATOR_INDEX, JSFunction, array_entries_iterator)          \
     315             :   V(ARRAY_FOR_EACH_ITERATOR_INDEX, JSFunction, array_for_each_iterator)        \
     316             :   V(ARRAY_KEYS_ITERATOR_INDEX, JSFunction, array_keys_iterator)                \
     317             :   V(ARRAY_VALUES_ITERATOR_INDEX, JSFunction, array_values_iterator)            \
     318             :   V(ERROR_FUNCTION_INDEX, JSFunction, error_function)                          \
     319             :   V(ERROR_TO_STRING, JSFunction, error_to_string)                              \
     320             :   V(EVAL_ERROR_FUNCTION_INDEX, JSFunction, eval_error_function)                \
     321             :   V(GLOBAL_EVAL_FUN_INDEX, JSFunction, global_eval_fun)                        \
     322             :   V(GLOBAL_PROXY_FUNCTION_INDEX, JSFunction, global_proxy_function)            \
     323             :   V(MAP_DELETE_INDEX, JSFunction, map_delete)                                  \
     324             :   V(MAP_GET_INDEX, JSFunction, map_get)                                        \
     325             :   V(MAP_HAS_INDEX, JSFunction, map_has)                                        \
     326             :   V(MAP_SET_INDEX, JSFunction, map_set)                                        \
     327             :   V(FUNCTION_HAS_INSTANCE_INDEX, JSFunction, function_has_instance)            \
     328             :   V(OBJECT_TO_STRING, JSFunction, object_to_string)                            \
     329             :   V(PROMISE_ALL_INDEX, JSFunction, promise_all)                                \
     330             :   V(PROMISE_CATCH_INDEX, JSFunction, promise_catch)                            \
     331             :   V(PROMISE_FUNCTION_INDEX, JSFunction, promise_function)                      \
     332             :   V(RANGE_ERROR_FUNCTION_INDEX, JSFunction, range_error_function)              \
     333             :   V(REFERENCE_ERROR_FUNCTION_INDEX, JSFunction, reference_error_function)      \
     334             :   V(SET_ADD_INDEX, JSFunction, set_add)                                        \
     335             :   V(SET_DELETE_INDEX, JSFunction, set_delete)                                  \
     336             :   V(SET_HAS_INDEX, JSFunction, set_has)                                        \
     337             :   V(SYNTAX_ERROR_FUNCTION_INDEX, JSFunction, syntax_error_function)            \
     338             :   V(TYPE_ERROR_FUNCTION_INDEX, JSFunction, type_error_function)                \
     339             :   V(URI_ERROR_FUNCTION_INDEX, JSFunction, uri_error_function)                  \
     340             :   V(WASM_COMPILE_ERROR_FUNCTION_INDEX, JSFunction,                             \
     341             :     wasm_compile_error_function)                                               \
     342             :   V(WASM_LINK_ERROR_FUNCTION_INDEX, JSFunction, wasm_link_error_function)      \
     343             :   V(WASM_RUNTIME_ERROR_FUNCTION_INDEX, JSFunction,                             \
     344             :     wasm_runtime_error_function)                                               \
     345             :   V(WEAKMAP_SET_INDEX, JSFunction, weakmap_set)                                \
     346             :   V(WEAKMAP_GET_INDEX, JSFunction, weakmap_get)                                \
     347             :   V(WEAKSET_ADD_INDEX, JSFunction, weakset_add)                                \
     348             :   NATIVE_CONTEXT_INTRINSIC_FUNCTIONS(V)
     349             : 
     350             : // A table of all script contexts. Every loaded top-level script with top-level
     351             : // lexical declarations contributes its ScriptContext into this table.
     352             : //
     353             : // The table is a fixed array, its first slot is the current used count and
     354             : // the subsequent slots 1..used contain ScriptContexts.
     355             : class ScriptContextTable : public FixedArray {
     356             :  public:
     357             :   DECL_CAST(ScriptContextTable)
     358             : 
     359             :   struct LookupResult {
     360             :     int context_index;
     361             :     int slot_index;
     362             :     VariableMode mode;
     363             :     InitializationFlag init_flag;
     364             :     MaybeAssignedFlag maybe_assigned_flag;
     365             :   };
     366             : 
     367             :   inline int used() const;
     368             :   inline void set_used(int used);
     369             : 
     370             :   static inline Handle<Context> GetContext(Isolate* isolate,
     371             :                                            Handle<ScriptContextTable> table,
     372             :                                            int i);
     373             : 
     374             :   // Lookup a variable `name` in a ScriptContextTable.
     375             :   // If it returns true, the variable is found and `result` contains
     376             :   // valid information about its location.
     377             :   // If it returns false, `result` is untouched.
     378             :   V8_WARN_UNUSED_RESULT
     379             :   static bool Lookup(Isolate* isolate, Handle<ScriptContextTable> table,
     380             :                      Handle<String> name, LookupResult* result);
     381             : 
     382             :   V8_WARN_UNUSED_RESULT
     383             :   static Handle<ScriptContextTable> Extend(Handle<ScriptContextTable> table,
     384             :                                            Handle<Context> script_context);
     385             : 
     386             :   static const int kUsedSlotIndex = 0;
     387             :   static const int kFirstContextSlotIndex = 1;
     388             :   static const int kMinLength = kFirstContextSlotIndex;
     389             : 
     390             :   OBJECT_CONSTRUCTORS(ScriptContextTable, FixedArray);
     391             : };
     392             : 
     393             : // JSFunctions are pairs (context, function code), sometimes also called
     394             : // closures. A Context object is used to represent function contexts and
     395             : // dynamically pushed 'with' contexts (or 'scopes' in ECMA-262 speak).
     396             : //
     397             : // At runtime, the contexts build a stack in parallel to the execution
     398             : // stack, with the top-most context being the current context. All contexts
     399             : // have the following slots:
     400             : //
     401             : // [ scope_info     ]  This is the scope info describing the current context. It
     402             : //                     contains the names of statically allocated context slots,
     403             : //                     and stack-allocated locals.  The names are needed for
     404             : //                     dynamic lookups in the presence of 'with' or 'eval', and
     405             : //                     for the debugger.
     406             : //
     407             : // [ previous       ]  A pointer to the previous context.
     408             : //
     409             : // [ extension      ]  Additional data.
     410             : //
     411             : //                     For native contexts, it contains the global object.
     412             : //                     For module contexts, it contains the module object.
     413             : //                     For await contexts, it contains the generator object.
     414             : //                     For block contexts, it may contain an "extension object".
     415             : //                     For with contexts, it contains an "extension object".
     416             : //
     417             : //                     An "extension object" is used to dynamically extend a
     418             : //                     context with additional variables, namely in the
     419             : //                     implementation of the 'with' construct and the 'eval'
     420             : //                     construct.  For instance, Context::Lookup also searches
     421             : //                     the extension object for properties.  (Storing the
     422             : //                     extension object is the original purpose of this context
     423             : //                     slot, hence the name.)
     424             : //
     425             : // [ native_context ]  A pointer to the native context.
     426             : //
     427             : // In addition, function contexts may have statically allocated context slots
     428             : // to store local variables/functions that are accessed from inner functions
     429             : // (via static context addresses) or through 'eval' (dynamic context lookups).
     430             : // The native context contains additional slots for fast access to native
     431             : // properties.
     432             : //
     433             : // Finally, with Harmony scoping, the JSFunction representing a top level
     434             : // script will have the ScriptContext rather than a FunctionContext.
     435             : // Script contexts from all top-level scripts are gathered in
     436             : // ScriptContextTable.
     437             : 
     438             : class Context : public HeapObject {
     439             :  public:
     440             :   NEVER_READ_ONLY_SPACE
     441             : 
     442             :   DECL_CAST(Context)
     443             : 
     444             :   // [length]: length of the context.
     445             :   V8_INLINE int length() const;
     446             :   V8_INLINE void set_length(int value);
     447             : 
     448             :   // Setter and getter for elements.
     449             :   V8_INLINE Object get(int index) const;
     450             :   V8_INLINE void set(int index, Object value);
     451             :   // Setter with explicit barrier mode.
     452             :   V8_INLINE void set(int index, Object value, WriteBarrierMode mode);
     453             : 
     454             :   // Layout description.
     455             : #define CONTEXT_FIELDS(V)                                             \
     456             :   V(kLengthOffset, kTaggedSize)                                       \
     457             :   /* TODO(ishell): remove this fixedArray-like header size. */        \
     458             :   V(kHeaderSize, 0)                                                   \
     459             :   V(kStartOfTaggedFieldsOffset, 0)                                    \
     460             :   V(kStartOfStrongFieldsOffset, 0)                                    \
     461             :   /* Tagged fields. */                                                \
     462             :   V(kScopeInfoOffset, kTaggedSize)                                    \
     463             :   V(kPreviousOffset, kTaggedSize)                                     \
     464             :   V(kExtensionOffset, kTaggedSize)                                    \
     465             :   V(kNativeContextOffset, kTaggedSize)                                \
     466             :   /* Header size. */                                                  \
     467             :   /* TODO(ishell): use this as header size once MIN_CONTEXT_SLOTS */  \
     468             :   /* is removed in favour of offset-based access to common fields. */ \
     469             :   V(kTodoHeaderSize, 0)
     470             : 
     471             :   DEFINE_FIELD_OFFSET_CONSTANTS(HeapObject::kHeaderSize, CONTEXT_FIELDS)
     472             : #undef CONTEXT_FIELDS
     473             : 
     474             :   // Garbage collection support.
     475             :   V8_INLINE static constexpr int SizeFor(int length) {
     476             :     // TODO(ishell): switch to kTodoHeaderSize based approach once we no longer
     477             :     // reference common Context fields via index
     478    60320853 :     return kHeaderSize + length * kTaggedSize;
     479             :   }
     480             : 
     481             :   // Code Generation support.
     482             :   // Offset of the element from the beginning of object.
     483             :   V8_INLINE static constexpr int OffsetOfElementAt(int index) {
     484             :     return SizeFor(index);
     485             :   }
     486             :   // Offset of the element from the heap object pointer.
     487             :   V8_INLINE static constexpr int SlotOffset(int index) {
     488       82707 :     return SizeFor(index) - kHeapObjectTag;
     489             :   }
     490             : 
     491             :   // TODO(ishell): eventually migrate to the offset based access instead of
     492             :   // index-based.
     493             :   // The default context slot layout; indices are FixedArray slot indices.
     494             :   enum Field {
     495             :     // TODO(shell): use offset-based approach for accessing common values.
     496             :     // These slots are in all contexts.
     497             :     SCOPE_INFO_INDEX,
     498             :     PREVIOUS_INDEX,
     499             :     EXTENSION_INDEX,
     500             :     NATIVE_CONTEXT_INDEX,
     501             : 
     502             : // These slots are only in native contexts.
     503             : #define NATIVE_CONTEXT_SLOT(index, type, name) index,
     504             :     NATIVE_CONTEXT_FIELDS(NATIVE_CONTEXT_SLOT)
     505             : #undef NATIVE_CONTEXT_SLOT
     506             : 
     507             :     // Properties from here are treated as weak references by the full GC.
     508             :     // Scavenge treats them as strong references.
     509             :     OPTIMIZED_CODE_LIST,    // Weak.
     510             :     DEOPTIMIZED_CODE_LIST,  // Weak.
     511             :     NEXT_CONTEXT_LINK,      // Weak.
     512             : 
     513             :     // Total number of slots.
     514             :     NATIVE_CONTEXT_SLOTS,
     515             :     FIRST_WEAK_SLOT = OPTIMIZED_CODE_LIST,
     516             :     FIRST_JS_ARRAY_MAP_SLOT = JS_ARRAY_PACKED_SMI_ELEMENTS_MAP_INDEX,
     517             : 
     518             :     // TODO(shell): Remove, once it becomes zero
     519             :     MIN_CONTEXT_SLOTS = GLOBAL_PROXY_INDEX,
     520             : 
     521             :     // This slot holds the thrown value in catch contexts.
     522             :     THROWN_OBJECT_INDEX = MIN_CONTEXT_SLOTS,
     523             : 
     524             :     // These slots hold values in debug evaluate contexts.
     525             :     WRAPPED_CONTEXT_INDEX = MIN_CONTEXT_SLOTS,
     526             :     WHITE_LIST_INDEX = MIN_CONTEXT_SLOTS + 1
     527             :   };
     528             : 
     529             :   // A region of native context entries containing maps for functions created
     530             :   // by Builtins::kFastNewClosure.
     531             :   static const int FIRST_FUNCTION_MAP_INDEX = SLOPPY_FUNCTION_MAP_INDEX;
     532             :   static const int LAST_FUNCTION_MAP_INDEX = CLASS_FUNCTION_MAP_INDEX;
     533             : 
     534             :   static const int kNoContext = 0;
     535             :   static const int kInvalidContext = 1;
     536             : 
     537             :   void ResetErrorsThrown();
     538             :   void IncrementErrorsThrown();
     539             :   int GetErrorsThrown();
     540             : 
     541             :   // Direct slot access.
     542             :   inline void set_scope_info(ScopeInfo scope_info);
     543             :   inline Context previous();
     544             :   inline void set_previous(Context context);
     545             : 
     546             :   inline Object next_context_link();
     547             : 
     548             :   inline bool has_extension();
     549             :   inline HeapObject extension();
     550             :   inline void set_extension(HeapObject object);
     551             :   JSObject extension_object();
     552             :   JSReceiver extension_receiver();
     553             :   ScopeInfo scope_info();
     554             : 
     555             :   // Find the module context (assuming there is one) and return the associated
     556             :   // module object.
     557             :   Module module();
     558             : 
     559             :   // Get the context where var declarations will be hoisted to, which
     560             :   // may be the context itself.
     561             :   Context declaration_context();
     562             :   bool is_declaration_context();
     563             : 
     564             :   // Get the next closure's context on the context chain.
     565             :   Context closure_context();
     566             : 
     567             :   // Returns a JSGlobalProxy object or null.
     568             :   JSGlobalProxy global_proxy();
     569             :   void set_global_proxy(JSGlobalProxy global);
     570             : 
     571             :   // Get the JSGlobalObject object.
     572             :   V8_EXPORT_PRIVATE JSGlobalObject global_object();
     573             : 
     574             :   // Get the script context by traversing the context chain.
     575             :   Context script_context();
     576             : 
     577             :   // Compute the native context.
     578             :   inline NativeContext native_context() const;
     579             :   inline void set_native_context(NativeContext context);
     580             : 
     581             :   // Predicates for context types.  IsNativeContext is already defined on
     582             :   // Object.
     583             :   inline bool IsFunctionContext() const;
     584             :   inline bool IsCatchContext() const;
     585             :   inline bool IsWithContext() const;
     586             :   inline bool IsDebugEvaluateContext() const;
     587             :   inline bool IsAwaitContext() const;
     588             :   inline bool IsBlockContext() const;
     589             :   inline bool IsModuleContext() const;
     590             :   inline bool IsEvalContext() const;
     591             :   inline bool IsScriptContext() const;
     592             : 
     593             :   inline bool HasSameSecurityTokenAs(Context that) const;
     594             : 
     595             :   // The native context also stores a list of all optimized code and a
     596             :   // list of all deoptimized code, which are needed by the deoptimizer.
     597             :   void AddOptimizedCode(Code code);
     598             :   void SetOptimizedCodeListHead(Object head);
     599             :   Object OptimizedCodeListHead();
     600             :   void SetDeoptimizedCodeListHead(Object head);
     601             :   Object DeoptimizedCodeListHead();
     602             : 
     603             :   Handle<Object> ErrorMessageForCodeGenerationFromStrings();
     604             : 
     605             :   static int IntrinsicIndexForName(Handle<String> name);
     606             :   static int IntrinsicIndexForName(const unsigned char* name, int length);
     607             : 
     608             : #define NATIVE_CONTEXT_FIELD_ACCESSORS(index, type, name) \
     609             :   inline void set_##name(type value);                     \
     610             :   inline bool is_##name(type value) const;                \
     611             :   inline type name() const;
     612             :   NATIVE_CONTEXT_FIELDS(NATIVE_CONTEXT_FIELD_ACCESSORS)
     613             : #undef NATIVE_CONTEXT_FIELD_ACCESSORS
     614             : 
     615             :   // Lookup the slot called name, starting with the current context.
     616             :   // There are three possibilities:
     617             :   //
     618             :   // 1) result->IsContext():
     619             :   //    The binding was found in a context.  *index is always the
     620             :   //    non-negative slot index.  *attributes is NONE for var and let
     621             :   //    declarations, READ_ONLY for const declarations (never ABSENT).
     622             :   //
     623             :   // 2) result->IsJSObject():
     624             :   //    The binding was found as a named property in a context extension
     625             :   //    object (i.e., was introduced via eval), as a property on the subject
     626             :   //    of with, or as a property of the global object.  *index is -1 and
     627             :   //    *attributes is not ABSENT.
     628             :   //
     629             :   // 3) result->IsModule():
     630             :   //    The binding was found in module imports or exports.
     631             :   //     *attributes is never ABSENT. imports are READ_ONLY.
     632             :   //
     633             :   // 4) result.is_null():
     634             :   //    There was no binding found, *index is always -1 and *attributes is
     635             :   //    always ABSENT.
     636             :   static Handle<Object> Lookup(Handle<Context> context, Handle<String> name,
     637             :                                ContextLookupFlags flags, int* index,
     638             :                                PropertyAttributes* attributes,
     639             :                                InitializationFlag* init_flag,
     640             :                                VariableMode* variable_mode,
     641             :                                bool* is_sloppy_function_name = nullptr);
     642             : 
     643             :   static inline int FunctionMapIndex(LanguageMode language_mode,
     644             :                                      FunctionKind kind, bool has_prototype_slot,
     645             :                                      bool has_shared_name,
     646             :                                      bool needs_home_object);
     647             : 
     648             :   static int ArrayMapIndex(ElementsKind elements_kind) {
     649             :     DCHECK(IsFastElementsKind(elements_kind));
     650     4351283 :     return elements_kind + FIRST_JS_ARRAY_MAP_SLOT;
     651             :   }
     652             : 
     653             :   inline Map GetInitialJSArrayMap(ElementsKind kind) const;
     654             : 
     655             :   static const int kNotFound = -1;
     656             : 
     657             :   // Dispatched behavior.
     658             :   DECL_PRINTER(Context)
     659             :   DECL_VERIFIER(Context)
     660             : 
     661             :   typedef FlexibleBodyDescriptor<kStartOfTaggedFieldsOffset> BodyDescriptor;
     662             : 
     663             :  private:
     664             : #ifdef DEBUG
     665             :   // Bootstrapping-aware type checks.
     666             :   V8_EXPORT_PRIVATE static bool IsBootstrappingOrNativeContext(Isolate* isolate,
     667             :                                                                Object object);
     668             :   static bool IsBootstrappingOrValidParentContext(Object object, Context kid);
     669             : #endif
     670             : 
     671   427177168 :   OBJECT_CONSTRUCTORS(Context, HeapObject)
     672             : };
     673             : 
     674             : class NativeContext : public Context {
     675             :  public:
     676             :   DECL_CAST(NativeContext)
     677             :   // TODO(neis): Move some stuff from Context here.
     678             : 
     679             :   // [microtask_queue]: pointer to the MicrotaskQueue object.
     680             :   DECL_PRIMITIVE_ACCESSORS(microtask_queue, MicrotaskQueue*)
     681             : 
     682             :   // Dispatched behavior.
     683             :   DECL_PRINTER(NativeContext)
     684             :   DECL_VERIFIER(NativeContext)
     685             : 
     686             :   // Layout description.
     687             : #define NATIVE_CONTEXT_FIELDS_DEF(V)                                        \
     688             :   /* TODO(ishell): move definition of common context offsets to Context. */ \
     689             :   V(kStartOfNativeContextFieldsOffset,                                      \
     690             :     (FIRST_WEAK_SLOT - MIN_CONTEXT_SLOTS) * kTaggedSize)                    \
     691             :   V(kEndOfStrongFieldsOffset, 0)                                            \
     692             :   V(kStartOfWeakFieldsOffset,                                               \
     693             :     (NATIVE_CONTEXT_SLOTS - FIRST_WEAK_SLOT) * kTaggedSize)                 \
     694             :   V(kEndOfWeakFieldsOffset, 0)                                              \
     695             :   V(kEndOfNativeContextFieldsOffset, 0)                                     \
     696             :   V(kEndOfTaggedFieldsOffset, 0)                                            \
     697             :   /* Raw data. */                                                           \
     698             :   V(kMicrotaskQueueOffset, kSystemPointerSize)                              \
     699             :   /* Total size. */                                                         \
     700             :   V(kSize, 0)
     701             : 
     702             :   DEFINE_FIELD_OFFSET_CONSTANTS(Context::kTodoHeaderSize,
     703             :                                 NATIVE_CONTEXT_FIELDS_DEF)
     704             : #undef NATIVE_CONTEXT_FIELDS_DEF
     705             : 
     706             :   class BodyDescriptor;
     707             : 
     708             :  private:
     709             :   STATIC_ASSERT(OffsetOfElementAt(EMBEDDER_DATA_INDEX) ==
     710             :                 Internals::kNativeContextEmbedderDataOffset);
     711             : 
     712     2565441 :   OBJECT_CONSTRUCTORS(NativeContext, Context);
     713             : };
     714             : 
     715             : typedef Context::Field ContextField;
     716             : 
     717             : }  // namespace internal
     718             : }  // namespace v8
     719             : 
     720             : #include "src/objects/object-macros-undef.h"
     721             : 
     722             : #endif  // V8_CONTEXTS_H_

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