| // Copyright 2012 the V8 project authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef V8_OBJECTS_CONTEXTS_H_ |
| #define V8_OBJECTS_CONTEXTS_H_ |
| |
| #include "src/objects/fixed-array.h" |
| #include "src/objects/function-kind.h" |
| #include "src/objects/ordered-hash-table.h" |
| #include "src/objects/osr-optimized-code-cache.h" |
| #include "torque-generated/field-offsets.h" |
| // Has to be the last include (doesn't have include guards): |
| #include "src/objects/object-macros.h" |
| |
| namespace v8 { |
| namespace internal { |
| |
| class JSGlobalObject; |
| class JSGlobalProxy; |
| class MicrotaskQueue; |
| class NativeContext; |
| class RegExpMatchInfo; |
| |
| enum ContextLookupFlags { |
| FOLLOW_CONTEXT_CHAIN = 1 << 0, |
| FOLLOW_PROTOTYPE_CHAIN = 1 << 1, |
| |
| DONT_FOLLOW_CHAINS = 0, |
| FOLLOW_CHAINS = FOLLOW_CONTEXT_CHAIN | FOLLOW_PROTOTYPE_CHAIN, |
| }; |
| |
| // Heap-allocated activation contexts. |
| // |
| // Contexts are implemented as FixedArray-like objects having a fixed |
| // header with a set of common fields. |
| // |
| // Note: Context must have no virtual functions and Context objects |
| // must always be allocated via Heap::AllocateContext() or |
| // Factory::NewContext. |
| |
| #define NATIVE_CONTEXT_INTRINSIC_FUNCTIONS(V) \ |
| V(GENERATOR_NEXT_INTERNAL, JSFunction, generator_next_internal) \ |
| V(ASYNC_MODULE_EVALUATE_INTERNAL, JSFunction, \ |
| async_module_evaluate_internal) \ |
| V(OBJECT_CREATE, JSFunction, object_create) \ |
| V(REFLECT_APPLY_INDEX, JSFunction, reflect_apply) \ |
| V(REFLECT_CONSTRUCT_INDEX, JSFunction, reflect_construct) \ |
| V(MATH_FLOOR_INDEX, JSFunction, math_floor) \ |
| V(MATH_POW_INDEX, JSFunction, math_pow) \ |
| V(PROMISE_INTERNAL_CONSTRUCTOR_INDEX, JSFunction, \ |
| promise_internal_constructor) \ |
| V(PROMISE_THEN_INDEX, JSFunction, promise_then) |
| |
| #define NATIVE_CONTEXT_FIELDS(V) \ |
| V(GLOBAL_PROXY_INDEX, JSGlobalProxy, global_proxy_object) \ |
| /* TODO(ishell): Actually we store exactly EmbedderDataArray here but */ \ |
| /* it's already UBSan-fiendly and doesn't require a star... So declare */ \ |
| /* it as a HeapObject for now. */ \ |
| V(EMBEDDER_DATA_INDEX, HeapObject, embedder_data) \ |
| V(CONTINUATION_PRESERVED_EMBEDDER_DATA_INDEX, HeapObject, \ |
| continuation_preserved_embedder_data) \ |
| NATIVE_CONTEXT_INTRINSIC_FUNCTIONS(V) \ |
| /* Below is alpha-sorted */ \ |
| V(ACCESSOR_PROPERTY_DESCRIPTOR_MAP_INDEX, Map, \ |
| accessor_property_descriptor_map) \ |
| V(ALLOW_CODE_GEN_FROM_STRINGS_INDEX, Object, allow_code_gen_from_strings) \ |
| V(ARRAY_BUFFER_FUN_INDEX, JSFunction, array_buffer_fun) \ |
| V(ARRAY_BUFFER_MAP_INDEX, Map, array_buffer_map) \ |
| V(ARRAY_BUFFER_NOINIT_FUN_INDEX, JSFunction, array_buffer_noinit_fun) \ |
| V(ARRAY_FUNCTION_INDEX, JSFunction, array_function) \ |
| V(ARRAY_JOIN_STACK_INDEX, HeapObject, array_join_stack) \ |
| V(ASYNC_FROM_SYNC_ITERATOR_MAP_INDEX, Map, async_from_sync_iterator_map) \ |
| V(ASYNC_FUNCTION_FUNCTION_INDEX, JSFunction, async_function_constructor) \ |
| V(ASYNC_FUNCTION_OBJECT_MAP_INDEX, Map, async_function_object_map) \ |
| V(ASYNC_GENERATOR_FUNCTION_FUNCTION_INDEX, JSFunction, \ |
| async_generator_function_function) \ |
| V(ATOMICS_OBJECT, JSObject, atomics_object) \ |
| V(BIGINT_FUNCTION_INDEX, JSFunction, bigint_function) \ |
| V(BIGINT64_ARRAY_FUN_INDEX, JSFunction, bigint64_array_fun) \ |
| V(BIGUINT64_ARRAY_FUN_INDEX, JSFunction, biguint64_array_fun) \ |
| V(BOOLEAN_FUNCTION_INDEX, JSFunction, boolean_function) \ |
| V(BOUND_FUNCTION_WITH_CONSTRUCTOR_MAP_INDEX, Map, \ |
| bound_function_with_constructor_map) \ |
| V(BOUND_FUNCTION_WITHOUT_CONSTRUCTOR_MAP_INDEX, Map, \ |
| bound_function_without_constructor_map) \ |
| V(CALL_AS_CONSTRUCTOR_DELEGATE_INDEX, JSFunction, \ |
| call_as_constructor_delegate) \ |
| V(CALL_AS_FUNCTION_DELEGATE_INDEX, JSFunction, call_as_function_delegate) \ |
| V(CALL_ASYNC_MODULE_FULFILLED, JSFunction, call_async_module_fulfilled) \ |
| V(CALL_ASYNC_MODULE_REJECTED, JSFunction, call_async_module_rejected) \ |
| V(CALLSITE_FUNCTION_INDEX, JSFunction, callsite_function) \ |
| V(CONTEXT_EXTENSION_FUNCTION_INDEX, JSFunction, context_extension_function) \ |
| V(DATA_PROPERTY_DESCRIPTOR_MAP_INDEX, Map, data_property_descriptor_map) \ |
| V(DATA_VIEW_FUN_INDEX, JSFunction, data_view_fun) \ |
| V(DATE_FUNCTION_INDEX, JSFunction, date_function) \ |
| V(DEBUG_CONTEXT_ID_INDEX, Object, debug_context_id) \ |
| V(EMPTY_FUNCTION_INDEX, JSFunction, empty_function) \ |
| V(ERROR_MESSAGE_FOR_CODE_GEN_FROM_STRINGS_INDEX, Object, \ |
| error_message_for_code_gen_from_strings) \ |
| V(ERRORS_THROWN_INDEX, Smi, errors_thrown) \ |
| V(EXTRAS_BINDING_OBJECT_INDEX, JSObject, extras_binding_object) \ |
| V(FAST_ALIASED_ARGUMENTS_MAP_INDEX, Map, fast_aliased_arguments_map) \ |
| V(FAST_TEMPLATE_INSTANTIATIONS_CACHE_INDEX, FixedArray, \ |
| fast_template_instantiations_cache) \ |
| V(FLOAT32_ARRAY_FUN_INDEX, JSFunction, float32_array_fun) \ |
| V(FLOAT64_ARRAY_FUN_INDEX, JSFunction, float64_array_fun) \ |
| V(FUNCTION_FUNCTION_INDEX, JSFunction, function_function) \ |
| V(GENERATOR_FUNCTION_FUNCTION_INDEX, JSFunction, \ |
| generator_function_function) \ |
| V(GENERATOR_OBJECT_PROTOTYPE_MAP_INDEX, Map, generator_object_prototype_map) \ |
| V(ASYNC_GENERATOR_OBJECT_PROTOTYPE_MAP_INDEX, Map, \ |
| async_generator_object_prototype_map) \ |
| V(INITIAL_ARRAY_ITERATOR_MAP_INDEX, Map, initial_array_iterator_map) \ |
| V(INITIAL_ARRAY_ITERATOR_PROTOTYPE_INDEX, JSObject, \ |
| initial_array_iterator_prototype) \ |
| V(INITIAL_ARRAY_PROTOTYPE_INDEX, JSObject, initial_array_prototype) \ |
| V(INITIAL_ERROR_PROTOTYPE_INDEX, JSObject, initial_error_prototype) \ |
| V(INITIAL_GENERATOR_PROTOTYPE_INDEX, JSObject, initial_generator_prototype) \ |
| V(INITIAL_ASYNC_ITERATOR_PROTOTYPE_INDEX, JSObject, \ |
| initial_async_iterator_prototype) \ |
| V(INITIAL_ASYNC_GENERATOR_PROTOTYPE_INDEX, JSObject, \ |
| initial_async_generator_prototype) \ |
| V(INITIAL_ITERATOR_PROTOTYPE_INDEX, JSObject, initial_iterator_prototype) \ |
| V(INITIAL_MAP_ITERATOR_PROTOTYPE_INDEX, JSObject, \ |
| initial_map_iterator_prototype) \ |
| V(INITIAL_MAP_PROTOTYPE_MAP_INDEX, Map, initial_map_prototype_map) \ |
| V(INITIAL_OBJECT_PROTOTYPE_INDEX, JSObject, initial_object_prototype) \ |
| V(INITIAL_SET_ITERATOR_PROTOTYPE_INDEX, JSObject, \ |
| initial_set_iterator_prototype) \ |
| V(INITIAL_SET_PROTOTYPE_INDEX, JSObject, initial_set_prototype) \ |
| V(INITIAL_SET_PROTOTYPE_MAP_INDEX, Map, initial_set_prototype_map) \ |
| V(INITIAL_STRING_ITERATOR_MAP_INDEX, Map, initial_string_iterator_map) \ |
| V(INITIAL_STRING_ITERATOR_PROTOTYPE_INDEX, JSObject, \ |
| initial_string_iterator_prototype) \ |
| V(INITIAL_STRING_PROTOTYPE_INDEX, JSObject, initial_string_prototype) \ |
| V(INITIAL_WEAKMAP_PROTOTYPE_MAP_INDEX, Map, initial_weakmap_prototype_map) \ |
| V(INITIAL_WEAKSET_PROTOTYPE_MAP_INDEX, Map, initial_weakset_prototype_map) \ |
| V(INT16_ARRAY_FUN_INDEX, JSFunction, int16_array_fun) \ |
| V(INT32_ARRAY_FUN_INDEX, JSFunction, int32_array_fun) \ |
| V(INT8_ARRAY_FUN_INDEX, JSFunction, int8_array_fun) \ |
| V(INTL_COLLATOR_FUNCTION_INDEX, JSFunction, intl_collator_function) \ |
| V(INTL_DATE_TIME_FORMAT_FUNCTION_INDEX, JSFunction, \ |
| intl_date_time_format_function) \ |
| V(INTL_DISPLAY_NAMES_FUNCTION_INDEX, JSFunction, \ |
| intl_display_names_function) \ |
| V(INTL_NUMBER_FORMAT_FUNCTION_INDEX, JSFunction, \ |
| intl_number_format_function) \ |
| V(INTL_LOCALE_FUNCTION_INDEX, JSFunction, intl_locale_function) \ |
| V(INTL_LIST_FORMAT_FUNCTION_INDEX, JSFunction, intl_list_format_function) \ |
| V(INTL_PLURAL_RULES_FUNCTION_INDEX, JSFunction, intl_plural_rules_function) \ |
| V(INTL_RELATIVE_TIME_FORMAT_FUNCTION_INDEX, JSFunction, \ |
| intl_relative_time_format_function) \ |
| V(INTL_SEGMENTER_FUNCTION_INDEX, JSFunction, intl_segmenter_function) \ |
| V(INTL_SEGMENTS_MAP_INDEX, Map, intl_segments_map) \ |
| V(INTL_SEGMENT_ITERATOR_MAP_INDEX, Map, intl_segment_iterator_map) \ |
| V(ITERATOR_RESULT_MAP_INDEX, Map, iterator_result_map) \ |
| V(JS_ARRAY_PACKED_SMI_ELEMENTS_MAP_INDEX, Map, \ |
| js_array_packed_smi_elements_map) \ |
| V(JS_ARRAY_HOLEY_SMI_ELEMENTS_MAP_INDEX, Map, \ |
| js_array_holey_smi_elements_map) \ |
| V(JS_ARRAY_PACKED_ELEMENTS_MAP_INDEX, Map, js_array_packed_elements_map) \ |
| V(JS_ARRAY_HOLEY_ELEMENTS_MAP_INDEX, Map, js_array_holey_elements_map) \ |
| V(JS_ARRAY_PACKED_DOUBLE_ELEMENTS_MAP_INDEX, Map, \ |
| js_array_packed_double_elements_map) \ |
| V(JS_ARRAY_HOLEY_DOUBLE_ELEMENTS_MAP_INDEX, Map, \ |
| js_array_holey_double_elements_map) \ |
| V(JS_MAP_FUN_INDEX, JSFunction, js_map_fun) \ |
| V(JS_MAP_MAP_INDEX, Map, js_map_map) \ |
| V(JS_MODULE_NAMESPACE_MAP, Map, js_module_namespace_map) \ |
| V(JS_SET_FUN_INDEX, JSFunction, js_set_fun) \ |
| V(JS_SET_MAP_INDEX, Map, js_set_map) \ |
| V(JS_WEAK_MAP_FUN_INDEX, JSFunction, js_weak_map_fun) \ |
| V(JS_WEAK_SET_FUN_INDEX, JSFunction, js_weak_set_fun) \ |
| V(JS_WEAK_REF_FUNCTION_INDEX, JSFunction, js_weak_ref_fun) \ |
| V(JS_FINALIZATION_REGISTRY_FUNCTION_INDEX, JSFunction, \ |
| js_finalization_registry_fun) \ |
| /* Context maps */ \ |
| V(NATIVE_CONTEXT_MAP_INDEX, Map, native_context_map) \ |
| V(FUNCTION_CONTEXT_MAP_INDEX, Map, function_context_map) \ |
| V(MODULE_CONTEXT_MAP_INDEX, Map, module_context_map) \ |
| V(EVAL_CONTEXT_MAP_INDEX, Map, eval_context_map) \ |
| V(SCRIPT_CONTEXT_MAP_INDEX, Map, script_context_map) \ |
| V(AWAIT_CONTEXT_MAP_INDEX, Map, await_context_map) \ |
| V(BLOCK_CONTEXT_MAP_INDEX, Map, block_context_map) \ |
| V(CATCH_CONTEXT_MAP_INDEX, Map, catch_context_map) \ |
| V(WITH_CONTEXT_MAP_INDEX, Map, with_context_map) \ |
| V(DEBUG_EVALUATE_CONTEXT_MAP_INDEX, Map, debug_evaluate_context_map) \ |
| V(MAP_CACHE_INDEX, Object, map_cache) \ |
| V(MAP_KEY_ITERATOR_MAP_INDEX, Map, map_key_iterator_map) \ |
| V(MAP_KEY_VALUE_ITERATOR_MAP_INDEX, Map, map_key_value_iterator_map) \ |
| V(MAP_VALUE_ITERATOR_MAP_INDEX, Map, map_value_iterator_map) \ |
| V(MATH_RANDOM_INDEX_INDEX, Smi, math_random_index) \ |
| V(MATH_RANDOM_STATE_INDEX, ByteArray, math_random_state) \ |
| V(MATH_RANDOM_CACHE_INDEX, FixedDoubleArray, math_random_cache) \ |
| V(MESSAGE_LISTENERS_INDEX, TemplateList, message_listeners) \ |
| V(NORMALIZED_MAP_CACHE_INDEX, Object, normalized_map_cache) \ |
| V(NUMBER_FUNCTION_INDEX, JSFunction, number_function) \ |
| V(OBJECT_FUNCTION_INDEX, JSFunction, object_function) \ |
| V(OBJECT_FUNCTION_PROTOTYPE_MAP_INDEX, Map, object_function_prototype_map) \ |
| V(PROXY_CALLABLE_MAP_INDEX, Map, proxy_callable_map) \ |
| V(PROXY_CONSTRUCTOR_MAP_INDEX, Map, proxy_constructor_map) \ |
| V(PROXY_FUNCTION_INDEX, JSFunction, proxy_function) \ |
| V(PROXY_MAP_INDEX, Map, proxy_map) \ |
| V(PROXY_REVOCABLE_RESULT_MAP_INDEX, Map, proxy_revocable_result_map) \ |
| V(PROMISE_PROTOTYPE_INDEX, JSObject, promise_prototype) \ |
| V(RECORDER_CONTEXT_ID, Object, recorder_context_id) \ |
| V(REGEXP_EXEC_FUNCTION_INDEX, JSFunction, regexp_exec_function) \ |
| V(REGEXP_FUNCTION_INDEX, JSFunction, regexp_function) \ |
| V(REGEXP_LAST_MATCH_INFO_INDEX, RegExpMatchInfo, regexp_last_match_info) \ |
| V(REGEXP_MATCH_ALL_FUNCTION_INDEX, JSFunction, regexp_match_all_function) \ |
| V(REGEXP_MATCH_FUNCTION_INDEX, JSFunction, regexp_match_function) \ |
| V(REGEXP_PROTOTYPE_INDEX, JSObject, regexp_prototype) \ |
| V(REGEXP_PROTOTYPE_MAP_INDEX, Map, regexp_prototype_map) \ |
| V(REGEXP_REPLACE_FUNCTION_INDEX, JSFunction, regexp_replace_function) \ |
| V(REGEXP_RESULT_MAP_INDEX, Map, regexp_result_map) \ |
| V(REGEXP_RESULT_INDICES_MAP_INDEX, Map, regexp_result_indices_map) \ |
| V(REGEXP_SEARCH_FUNCTION_INDEX, JSFunction, regexp_search_function) \ |
| V(REGEXP_SPLIT_FUNCTION_INDEX, JSFunction, regexp_split_function) \ |
| V(INITIAL_REGEXP_STRING_ITERATOR_PROTOTYPE_MAP_INDEX, Map, \ |
| initial_regexp_string_iterator_prototype_map) \ |
| V(SCRIPT_CONTEXT_TABLE_INDEX, ScriptContextTable, script_context_table) \ |
| V(SCRIPT_EXECUTION_CALLBACK_INDEX, Object, script_execution_callback) \ |
| V(SECURITY_TOKEN_INDEX, Object, security_token) \ |
| V(SERIALIZED_OBJECTS, FixedArray, serialized_objects) \ |
| V(SET_VALUE_ITERATOR_MAP_INDEX, Map, set_value_iterator_map) \ |
| V(SET_KEY_VALUE_ITERATOR_MAP_INDEX, Map, set_key_value_iterator_map) \ |
| V(SHARED_ARRAY_BUFFER_FUN_INDEX, JSFunction, shared_array_buffer_fun) \ |
| V(SLOPPY_ARGUMENTS_MAP_INDEX, Map, sloppy_arguments_map) \ |
| V(SLOW_ALIASED_ARGUMENTS_MAP_INDEX, Map, slow_aliased_arguments_map) \ |
| V(STRICT_ARGUMENTS_MAP_INDEX, Map, strict_arguments_map) \ |
| V(SLOW_OBJECT_WITH_NULL_PROTOTYPE_MAP, Map, \ |
| slow_object_with_null_prototype_map) \ |
| V(SLOW_OBJECT_WITH_OBJECT_PROTOTYPE_MAP, Map, \ |
| slow_object_with_object_prototype_map) \ |
| V(SLOW_TEMPLATE_INSTANTIATIONS_CACHE_INDEX, SimpleNumberDictionary, \ |
| slow_template_instantiations_cache) \ |
| V(ATOMICS_WAITASYNC_PROMISES, OrderedHashSet, atomics_waitasync_promises) \ |
| /* Fast Path Protectors */ \ |
| V(REGEXP_SPECIES_PROTECTOR_INDEX, PropertyCell, regexp_species_protector) \ |
| /* All *_FUNCTION_MAP_INDEX definitions used by Context::FunctionMapIndex */ \ |
| /* must remain together. */ \ |
| V(SLOPPY_FUNCTION_MAP_INDEX, Map, sloppy_function_map) \ |
| V(SLOPPY_FUNCTION_WITH_NAME_MAP_INDEX, Map, sloppy_function_with_name_map) \ |
| V(SLOPPY_FUNCTION_WITHOUT_PROTOTYPE_MAP_INDEX, Map, \ |
| sloppy_function_without_prototype_map) \ |
| V(SLOPPY_FUNCTION_WITH_READONLY_PROTOTYPE_MAP_INDEX, Map, \ |
| sloppy_function_with_readonly_prototype_map) \ |
| V(STRICT_FUNCTION_MAP_INDEX, Map, strict_function_map) \ |
| V(STRICT_FUNCTION_WITH_NAME_MAP_INDEX, Map, strict_function_with_name_map) \ |
| V(STRICT_FUNCTION_WITH_READONLY_PROTOTYPE_MAP_INDEX, Map, \ |
| strict_function_with_readonly_prototype_map) \ |
| V(STRICT_FUNCTION_WITHOUT_PROTOTYPE_MAP_INDEX, Map, \ |
| strict_function_without_prototype_map) \ |
| V(METHOD_WITH_NAME_MAP_INDEX, Map, method_with_name_map) \ |
| V(METHOD_WITH_HOME_OBJECT_MAP_INDEX, Map, method_with_home_object_map) \ |
| V(METHOD_WITH_NAME_AND_HOME_OBJECT_MAP_INDEX, Map, \ |
| method_with_name_and_home_object_map) \ |
| V(ASYNC_FUNCTION_MAP_INDEX, Map, async_function_map) \ |
| V(ASYNC_FUNCTION_WITH_NAME_MAP_INDEX, Map, async_function_with_name_map) \ |
| V(ASYNC_FUNCTION_WITH_HOME_OBJECT_MAP_INDEX, Map, \ |
| async_function_with_home_object_map) \ |
| V(ASYNC_FUNCTION_WITH_NAME_AND_HOME_OBJECT_MAP_INDEX, Map, \ |
| async_function_with_name_and_home_object_map) \ |
| V(GENERATOR_FUNCTION_MAP_INDEX, Map, generator_function_map) \ |
| V(GENERATOR_FUNCTION_WITH_NAME_MAP_INDEX, Map, \ |
| generator_function_with_name_map) \ |
| V(GENERATOR_FUNCTION_WITH_HOME_OBJECT_MAP_INDEX, Map, \ |
| generator_function_with_home_object_map) \ |
| V(GENERATOR_FUNCTION_WITH_NAME_AND_HOME_OBJECT_MAP_INDEX, Map, \ |
| generator_function_with_name_and_home_object_map) \ |
| V(ASYNC_GENERATOR_FUNCTION_MAP_INDEX, Map, async_generator_function_map) \ |
| V(ASYNC_GENERATOR_FUNCTION_WITH_NAME_MAP_INDEX, Map, \ |
| async_generator_function_with_name_map) \ |
| V(ASYNC_GENERATOR_FUNCTION_WITH_HOME_OBJECT_MAP_INDEX, Map, \ |
| async_generator_function_with_home_object_map) \ |
| V(ASYNC_GENERATOR_FUNCTION_WITH_NAME_AND_HOME_OBJECT_MAP_INDEX, Map, \ |
| async_generator_function_with_name_and_home_object_map) \ |
| V(CLASS_FUNCTION_MAP_INDEX, Map, class_function_map) \ |
| V(STRING_FUNCTION_INDEX, JSFunction, string_function) \ |
| V(STRING_FUNCTION_PROTOTYPE_MAP_INDEX, Map, string_function_prototype_map) \ |
| V(SYMBOL_FUNCTION_INDEX, JSFunction, symbol_function) \ |
| V(WASM_EXPORTED_FUNCTION_MAP_INDEX, Map, wasm_exported_function_map) \ |
| V(WASM_EXCEPTION_CONSTRUCTOR_INDEX, JSFunction, wasm_exception_constructor) \ |
| V(WASM_GLOBAL_CONSTRUCTOR_INDEX, JSFunction, wasm_global_constructor) \ |
| V(WASM_INSTANCE_CONSTRUCTOR_INDEX, JSFunction, wasm_instance_constructor) \ |
| V(WASM_MEMORY_CONSTRUCTOR_INDEX, JSFunction, wasm_memory_constructor) \ |
| V(WASM_MODULE_CONSTRUCTOR_INDEX, JSFunction, wasm_module_constructor) \ |
| V(WASM_TABLE_CONSTRUCTOR_INDEX, JSFunction, wasm_table_constructor) \ |
| V(TEMPLATE_WEAKMAP_INDEX, HeapObject, template_weakmap) \ |
| V(TYPED_ARRAY_FUN_INDEX, JSFunction, typed_array_function) \ |
| V(TYPED_ARRAY_PROTOTYPE_INDEX, JSObject, typed_array_prototype) \ |
| V(UINT16_ARRAY_FUN_INDEX, JSFunction, uint16_array_fun) \ |
| V(UINT32_ARRAY_FUN_INDEX, JSFunction, uint32_array_fun) \ |
| V(UINT8_ARRAY_FUN_INDEX, JSFunction, uint8_array_fun) \ |
| V(UINT8_CLAMPED_ARRAY_FUN_INDEX, JSFunction, uint8_clamped_array_fun) \ |
| V(ARRAY_ENTRIES_ITERATOR_INDEX, JSFunction, array_entries_iterator) \ |
| V(ARRAY_FOR_EACH_ITERATOR_INDEX, JSFunction, array_for_each_iterator) \ |
| V(ARRAY_KEYS_ITERATOR_INDEX, JSFunction, array_keys_iterator) \ |
| V(ARRAY_VALUES_ITERATOR_INDEX, JSFunction, array_values_iterator) \ |
| V(ERROR_FUNCTION_INDEX, JSFunction, error_function) \ |
| V(ERROR_TO_STRING, JSFunction, error_to_string) \ |
| V(EVAL_ERROR_FUNCTION_INDEX, JSFunction, eval_error_function) \ |
| V(AGGREGATE_ERROR_FUNCTION_INDEX, JSFunction, aggregate_error_function) \ |
| V(GLOBAL_EVAL_FUN_INDEX, JSFunction, global_eval_fun) \ |
| V(GLOBAL_PROXY_FUNCTION_INDEX, JSFunction, global_proxy_function) \ |
| V(MAP_DELETE_INDEX, JSFunction, map_delete) \ |
| V(MAP_GET_INDEX, JSFunction, map_get) \ |
| V(MAP_HAS_INDEX, JSFunction, map_has) \ |
| V(MAP_SET_INDEX, JSFunction, map_set) \ |
| V(FINALIZATION_REGISTRY_CLEANUP_SOME, JSFunction, \ |
| finalization_registry_cleanup_some) \ |
| V(FUNCTION_HAS_INSTANCE_INDEX, JSFunction, function_has_instance) \ |
| V(FUNCTION_TO_STRING_INDEX, JSFunction, function_to_string) \ |
| V(OBJECT_TO_STRING, JSFunction, object_to_string) \ |
| V(OBJECT_VALUE_OF_FUNCTION_INDEX, JSFunction, object_value_of_function) \ |
| V(PROMISE_ALL_INDEX, JSFunction, promise_all) \ |
| V(PROMISE_ANY_INDEX, JSFunction, promise_any) \ |
| V(PROMISE_CATCH_INDEX, JSFunction, promise_catch) \ |
| V(PROMISE_FUNCTION_INDEX, JSFunction, promise_function) \ |
| V(RANGE_ERROR_FUNCTION_INDEX, JSFunction, range_error_function) \ |
| V(REFERENCE_ERROR_FUNCTION_INDEX, JSFunction, reference_error_function) \ |
| V(SET_ADD_INDEX, JSFunction, set_add) \ |
| V(SET_DELETE_INDEX, JSFunction, set_delete) \ |
| V(SET_HAS_INDEX, JSFunction, set_has) \ |
| V(SYNTAX_ERROR_FUNCTION_INDEX, JSFunction, syntax_error_function) \ |
| V(TYPE_ERROR_FUNCTION_INDEX, JSFunction, type_error_function) \ |
| V(URI_ERROR_FUNCTION_INDEX, JSFunction, uri_error_function) \ |
| V(WASM_COMPILE_ERROR_FUNCTION_INDEX, JSFunction, \ |
| wasm_compile_error_function) \ |
| V(WASM_LINK_ERROR_FUNCTION_INDEX, JSFunction, wasm_link_error_function) \ |
| V(WASM_RUNTIME_ERROR_FUNCTION_INDEX, JSFunction, \ |
| wasm_runtime_error_function) \ |
| V(WEAKMAP_SET_INDEX, JSFunction, weakmap_set) \ |
| V(WEAKMAP_GET_INDEX, JSFunction, weakmap_get) \ |
| V(WEAKSET_ADD_INDEX, JSFunction, weakset_add) \ |
| V(RETAINED_MAPS, WeakArrayList, retained_maps) \ |
| V(OSR_CODE_CACHE_INDEX, WeakFixedArray, osr_code_cache) |
| |
| // A table of all script contexts. Every loaded top-level script with top-level |
| // lexical declarations contributes its ScriptContext into this table. |
| // |
| // The table is a fixed array, its first slot is the current used count and |
| // the subsequent slots 1..used contain ScriptContexts. |
| class ScriptContextTable : public FixedArray { |
| public: |
| DECL_CAST(ScriptContextTable) |
| |
| struct LookupResult { |
| int context_index; |
| int slot_index; |
| VariableMode mode; |
| InitializationFlag init_flag; |
| MaybeAssignedFlag maybe_assigned_flag; |
| }; |
| |
| inline int synchronized_used() const; |
| inline void synchronized_set_used(int used); |
| |
| static inline Handle<Context> GetContext(Isolate* isolate, |
| Handle<ScriptContextTable> table, |
| int i); |
| inline Context get_context(int i) const; |
| |
| // Lookup a variable `name` in a ScriptContextTable. |
| // If it returns true, the variable is found and `result` contains |
| // valid information about its location. |
| // If it returns false, `result` is untouched. |
| V8_WARN_UNUSED_RESULT |
| V8_EXPORT_PRIVATE static bool Lookup(Isolate* isolate, |
| ScriptContextTable table, String name, |
| LookupResult* result); |
| |
| V8_WARN_UNUSED_RESULT |
| V8_EXPORT_PRIVATE static Handle<ScriptContextTable> Extend( |
| Handle<ScriptContextTable> table, Handle<Context> script_context); |
| |
| static const int kUsedSlotIndex = 0; |
| static const int kFirstContextSlotIndex = 1; |
| static const int kMinLength = kFirstContextSlotIndex; |
| |
| OBJECT_CONSTRUCTORS(ScriptContextTable, FixedArray); |
| }; |
| |
| // JSFunctions are pairs (context, function code), sometimes also called |
| // closures. A Context object is used to represent function contexts and |
| // dynamically pushed 'with' contexts (or 'scopes' in ECMA-262 speak). |
| // |
| // At runtime, the contexts build a stack in parallel to the execution |
| // stack, with the top-most context being the current context. All contexts |
| // have the following slots: |
| // |
| // [ scope_info ] This is the scope info describing the current context. It |
| // contains the names of statically allocated context slots, |
| // and stack-allocated locals. The names are needed for |
| // dynamic lookups in the presence of 'with' or 'eval', and |
| // for the debugger. |
| // |
| // [ previous ] A pointer to the previous context. |
| // |
| // [ extension ] Additional data. This slot is only available when |
| // extension_bit is set. Check using has_extension. |
| // |
| // For native contexts, it contains the global object. |
| // For module contexts, it contains the module object. |
| // For await contexts, it contains the generator object. |
| // For var block contexts, it may contain an "extension |
| // object". |
| // For with contexts, it contains an "extension object". |
| // |
| // An "extension object" is used to dynamically extend a |
| // context with additional variables, namely in the |
| // implementation of the 'with' construct and the 'eval' |
| // construct. For instance, Context::Lookup also searches |
| // the extension object for properties. (Storing the |
| // extension object is the original purpose of this context |
| // slot, hence the name.) |
| // |
| // In addition, function contexts with sloppy eval may have statically |
| // allocated context slots to store local variables/functions that are accessed |
| // from inner functions (via static context addresses) or through 'eval' |
| // (dynamic context lookups). |
| // The native context contains additional slots for fast access to native |
| // properties. |
| // |
| // Finally, with Harmony scoping, the JSFunction representing a top level |
| // script will have the ScriptContext rather than a FunctionContext. |
| // Script contexts from all top-level scripts are gathered in |
| // ScriptContextTable. |
| |
| class Context : public HeapObject { |
| public: |
| NEVER_READ_ONLY_SPACE |
| |
| DECL_CAST(Context) |
| // [length]: length of the context. |
| V8_INLINE int length() const; |
| V8_INLINE void set_length(int value); |
| |
| // Setter and getter for elements. |
| V8_INLINE Object get(int index) const; |
| V8_INLINE Object get(IsolateRoot isolate, int index) const; |
| V8_INLINE void set(int index, Object value); |
| // Setter with explicit barrier mode. |
| V8_INLINE void set(int index, Object value, WriteBarrierMode mode); |
| // Setter and getter with synchronization semantics. |
| V8_INLINE Object synchronized_get(int index) const; |
| V8_INLINE Object synchronized_get(IsolateRoot isolate, int index) const; |
| V8_INLINE void synchronized_set(int index, Object value); |
| |
| DEFINE_FIELD_OFFSET_CONSTANTS(HeapObject::kHeaderSize, |
| TORQUE_GENERATED_CONTEXT_FIELDS) |
| static const int kScopeInfoOffset = kHeaderSize; |
| static const int kPreviousOffset = kScopeInfoOffset + kTaggedSize; |
| |
| // TODO(v8:8989): [torque] Support marker constants |
| /* TODO(ishell): remove this fixedArray-like header size. */ |
| static const int kFixedArrayLikeHeaderSize = kScopeInfoOffset; |
| static const int kStartOfTaggedFieldsOffset = kScopeInfoOffset; |
| /* Header size. */ \ |
| /* TODO(ishell): use this as header size once MIN_CONTEXT_SLOTS */ \ |
| /* is removed in favour of offset-based access to common fields. */ \ |
| static const int kTodoHeaderSize = kPreviousOffset + kTaggedSize; |
| |
| // If the extension slot exists, it is the first slot after the header. |
| static const int kExtensionOffset = kTodoHeaderSize; |
| |
| // Garbage collection support. |
| V8_INLINE static constexpr int SizeFor(int length) { |
| return kFixedArrayLikeHeaderSize + length * kTaggedSize; |
| } |
| |
| // Code Generation support. |
| // Offset of the element from the beginning of object. |
| V8_INLINE static constexpr int OffsetOfElementAt(int index) { |
| return SizeFor(index); |
| } |
| // Offset of the element from the heap object pointer. |
| V8_INLINE static constexpr int SlotOffset(int index) { |
| return SizeFor(index) - kHeapObjectTag; |
| } |
| |
| // Initializes the variable slots of the context. Lexical variables that need |
| // initialization are filled with the hole. |
| void Initialize(Isolate* isolate); |
| |
| // TODO(ishell): eventually migrate to the offset based access instead of |
| // index-based. |
| // The default context slot layout; indices are FixedArray slot indices. |
| enum Field { |
| // TODO(shell): use offset-based approach for accessing common values. |
| // These slots are in all contexts. |
| SCOPE_INFO_INDEX, |
| PREVIOUS_INDEX, |
| |
| // This slot only exists if the extension_flag bit is set. |
| EXTENSION_INDEX, |
| |
| // These slots are only in native contexts. |
| #define NATIVE_CONTEXT_SLOT(index, type, name) index, |
| NATIVE_CONTEXT_FIELDS(NATIVE_CONTEXT_SLOT) |
| #undef NATIVE_CONTEXT_SLOT |
| |
| // Properties from here are treated as weak references by the full GC. |
| // Scavenge treats them as strong references. |
| OPTIMIZED_CODE_LIST, // Weak. |
| DEOPTIMIZED_CODE_LIST, // Weak. |
| NEXT_CONTEXT_LINK, // Weak. |
| |
| // Total number of slots. |
| NATIVE_CONTEXT_SLOTS, |
| FIRST_WEAK_SLOT = OPTIMIZED_CODE_LIST, |
| FIRST_JS_ARRAY_MAP_SLOT = JS_ARRAY_PACKED_SMI_ELEMENTS_MAP_INDEX, |
| |
| // TODO(shell): Remove, once it becomes zero |
| MIN_CONTEXT_SLOTS = EXTENSION_INDEX, |
| MIN_CONTEXT_EXTENDED_SLOTS = EXTENSION_INDEX + 1, |
| |
| // This slot holds the thrown value in catch contexts. |
| THROWN_OBJECT_INDEX = MIN_CONTEXT_SLOTS, |
| |
| // These slots hold values in debug evaluate contexts. |
| WRAPPED_CONTEXT_INDEX = MIN_CONTEXT_EXTENDED_SLOTS, |
| BLOCK_LIST_INDEX = MIN_CONTEXT_EXTENDED_SLOTS + 1 |
| }; |
| |
| static const int kExtensionSize = |
| (MIN_CONTEXT_EXTENDED_SLOTS - MIN_CONTEXT_SLOTS) * kTaggedSize; |
| static const int kExtendedHeaderSize = kTodoHeaderSize + kExtensionSize; |
| |
| // A region of native context entries containing maps for functions created |
| // by Builtins::kFastNewClosure. |
| static const int FIRST_FUNCTION_MAP_INDEX = SLOPPY_FUNCTION_MAP_INDEX; |
| static const int LAST_FUNCTION_MAP_INDEX = CLASS_FUNCTION_MAP_INDEX; |
| |
| static const int kNoContext = 0; |
| static const int kInvalidContext = 1; |
| |
| // Direct slot access. |
| inline void set_scope_info(ScopeInfo scope_info); |
| |
| inline Object unchecked_previous(); |
| inline Context previous(); |
| inline void set_previous(Context context); |
| |
| inline Object next_context_link(); |
| |
| inline bool has_extension(); |
| inline HeapObject extension(); |
| inline void set_extension(HeapObject object); |
| JSObject extension_object(); |
| JSReceiver extension_receiver(); |
| V8_EXPORT_PRIVATE ScopeInfo scope_info(); |
| |
| // Find the module context (assuming there is one) and return the associated |
| // module object. |
| SourceTextModule module(); |
| |
| // Get the context where var declarations will be hoisted to, which |
| // may be the context itself. |
| Context declaration_context(); |
| bool is_declaration_context(); |
| |
| // Get the next closure's context on the context chain. |
| Context closure_context(); |
| |
| // Returns a JSGlobalProxy object or null. |
| V8_EXPORT_PRIVATE JSGlobalProxy global_proxy(); |
| |
| // Get the JSGlobalObject object. |
| V8_EXPORT_PRIVATE JSGlobalObject global_object(); |
| |
| // Get the script context by traversing the context chain. |
| Context script_context(); |
| |
| // Compute the native context. |
| inline NativeContext native_context() const; |
| |
| // Predicates for context types. IsNativeContext is already defined on |
| // Object. |
| inline bool IsFunctionContext() const; |
| inline bool IsCatchContext() const; |
| inline bool IsWithContext() const; |
| inline bool IsDebugEvaluateContext() const; |
| inline bool IsAwaitContext() const; |
| inline bool IsBlockContext() const; |
| inline bool IsModuleContext() const; |
| inline bool IsEvalContext() const; |
| inline bool IsScriptContext() const; |
| |
| inline bool HasSameSecurityTokenAs(Context that) const; |
| |
| Handle<Object> ErrorMessageForCodeGenerationFromStrings(); |
| |
| static int IntrinsicIndexForName(Handle<String> name); |
| static int IntrinsicIndexForName(const unsigned char* name, int length); |
| |
| #define NATIVE_CONTEXT_FIELD_ACCESSORS(index, type, name) \ |
| inline void set_##name(type value); \ |
| inline bool is_##name(type value) const; \ |
| inline type name() const; |
| NATIVE_CONTEXT_FIELDS(NATIVE_CONTEXT_FIELD_ACCESSORS) |
| #undef NATIVE_CONTEXT_FIELD_ACCESSORS |
| |
| // Lookup the slot called name, starting with the current context. |
| // There are three possibilities: |
| // |
| // 1) result->IsContext(): |
| // The binding was found in a context. *index is always the |
| // non-negative slot index. *attributes is NONE for var and let |
| // declarations, READ_ONLY for const declarations (never ABSENT). |
| // |
| // 2) result->IsJSObject(): |
| // The binding was found as a named property in a context extension |
| // object (i.e., was introduced via eval), as a property on the subject |
| // of with, or as a property of the global object. *index is -1 and |
| // *attributes is not ABSENT. |
| // |
| // 3) result->IsModule(): |
| // The binding was found in module imports or exports. |
| // *attributes is never ABSENT. imports are READ_ONLY. |
| // |
| // 4) result.is_null(): |
| // There was no binding found, *index is always -1 and *attributes is |
| // always ABSENT. |
| static Handle<Object> Lookup(Handle<Context> context, Handle<String> name, |
| ContextLookupFlags flags, int* index, |
| PropertyAttributes* attributes, |
| InitializationFlag* init_flag, |
| VariableMode* variable_mode, |
| bool* is_sloppy_function_name = nullptr); |
| |
| static inline int FunctionMapIndex(LanguageMode language_mode, |
| FunctionKind kind, bool has_shared_name, |
| bool needs_home_object); |
| |
| static int ArrayMapIndex(ElementsKind elements_kind) { |
| DCHECK(IsFastElementsKind(elements_kind)); |
| return elements_kind + FIRST_JS_ARRAY_MAP_SLOT; |
| } |
| |
| inline Map GetInitialJSArrayMap(ElementsKind kind) const; |
| |
| static const int kNotFound = -1; |
| |
| // Dispatched behavior. |
| DECL_PRINTER(Context) |
| DECL_VERIFIER(Context) |
| |
| using BodyDescriptor = FlexibleBodyDescriptor<kStartOfTaggedFieldsOffset>; |
| |
| private: |
| #ifdef DEBUG |
| // Bootstrapping-aware type checks. |
| static bool IsBootstrappingOrValidParentContext(Object object, Context kid); |
| #endif |
| |
| OBJECT_CONSTRUCTORS(Context, HeapObject); |
| }; |
| |
| class NativeContext : public Context { |
| public: |
| DECL_CAST(NativeContext) |
| // TODO(neis): Move some stuff from Context here. |
| |
| inline void AllocateExternalPointerEntries(Isolate* isolate); |
| |
| // [microtask_queue]: pointer to the MicrotaskQueue object. |
| DECL_GETTER(microtask_queue, MicrotaskQueue*) |
| inline void set_microtask_queue(Isolate* isolate, MicrotaskQueue* queue); |
| |
| inline void synchronized_set_script_context_table( |
| ScriptContextTable script_context_table); |
| inline ScriptContextTable synchronized_script_context_table() const; |
| |
| // Dispatched behavior. |
| DECL_PRINTER(NativeContext) |
| DECL_VERIFIER(NativeContext) |
| |
| // Layout description. |
| #define NATIVE_CONTEXT_FIELDS_DEF(V) \ |
| /* TODO(ishell): move definition of common context offsets to Context. */ \ |
| V(kStartOfNativeContextFieldsOffset, \ |
| (FIRST_WEAK_SLOT - MIN_CONTEXT_EXTENDED_SLOTS) * kTaggedSize) \ |
| V(kEndOfStrongFieldsOffset, 0) \ |
| V(kStartOfWeakFieldsOffset, \ |
| (NATIVE_CONTEXT_SLOTS - FIRST_WEAK_SLOT) * kTaggedSize) \ |
| V(kEndOfWeakFieldsOffset, 0) \ |
| V(kEndOfNativeContextFieldsOffset, 0) \ |
| V(kEndOfTaggedFieldsOffset, 0) \ |
| /* Raw data. */ \ |
| V(kMicrotaskQueueOffset, kSystemPointerSize) \ |
| /* Total size. */ \ |
| V(kSize, 0) |
| |
| DEFINE_FIELD_OFFSET_CONSTANTS(Context::kExtendedHeaderSize, |
| NATIVE_CONTEXT_FIELDS_DEF) |
| #undef NATIVE_CONTEXT_FIELDS_DEF |
| |
| class BodyDescriptor; |
| |
| // The native context stores a list of all optimized code and a list of all |
| // deoptimized code, which are needed by the deoptimizer. |
| V8_EXPORT_PRIVATE void AddOptimizedCode(Code code); |
| void SetOptimizedCodeListHead(Object head); |
| Object OptimizedCodeListHead(); |
| void SetDeoptimizedCodeListHead(Object head); |
| Object DeoptimizedCodeListHead(); |
| |
| inline OSROptimizedCodeCache GetOSROptimizedCodeCache(); |
| |
| void ResetErrorsThrown(); |
| void IncrementErrorsThrown(); |
| int GetErrorsThrown(); |
| |
| private: |
| STATIC_ASSERT(OffsetOfElementAt(EMBEDDER_DATA_INDEX) == |
| Internals::kNativeContextEmbedderDataOffset); |
| |
| OBJECT_CONSTRUCTORS(NativeContext, Context); |
| }; |
| |
| using ContextField = Context::Field; |
| |
| } // namespace internal |
| } // namespace v8 |
| |
| #include "src/objects/object-macros-undef.h" |
| |
| #endif // V8_OBJECTS_CONTEXTS_H_ |
