| // Copyright 2012 the V8 project authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef V8_CONTEXTS_H_ |
| #define V8_CONTEXTS_H_ |
| |
| #include "src/objects/fixed-array.h" |
| |
| namespace v8 { |
| namespace internal { |
| |
| class RegExpMatchInfo; |
| |
| enum ContextLookupFlags { |
| FOLLOW_CONTEXT_CHAIN = 1 << 0, |
| FOLLOW_PROTOTYPE_CHAIN = 1 << 1, |
| STOP_AT_DECLARATION_SCOPE = 1 << 2, |
| SKIP_WITH_CONTEXT = 1 << 3, |
| |
| DONT_FOLLOW_CHAINS = 0, |
| FOLLOW_CHAINS = FOLLOW_CONTEXT_CHAIN | FOLLOW_PROTOTYPE_CHAIN, |
| }; |
| |
| |
| // Heap-allocated activation contexts. |
| // |
| // Contexts are implemented as FixedArray objects; the Context |
| // class is a convenience interface casted on a FixedArray object. |
| // |
| // 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(ASYNC_FUNCTION_AWAIT_CAUGHT_INDEX, JSFunction, \ |
| async_function_await_caught) \ |
| V(ASYNC_FUNCTION_AWAIT_UNCAUGHT_INDEX, JSFunction, \ |
| async_function_await_uncaught) \ |
| V(ASYNC_FUNCTION_PROMISE_CREATE_INDEX, JSFunction, \ |
| async_function_promise_create) \ |
| V(ASYNC_FUNCTION_PROMISE_RELEASE_INDEX, JSFunction, \ |
| async_function_promise_release) \ |
| V(IS_ARRAYLIKE, JSFunction, is_arraylike) \ |
| V(GENERATOR_NEXT_INTERNAL, JSFunction, generator_next_internal) \ |
| V(MAKE_ERROR_INDEX, JSFunction, make_error) \ |
| V(MAKE_RANGE_ERROR_INDEX, JSFunction, make_range_error) \ |
| V(MAKE_SYNTAX_ERROR_INDEX, JSFunction, make_syntax_error) \ |
| V(MAKE_TYPE_ERROR_INDEX, JSFunction, make_type_error) \ |
| V(MAKE_URI_ERROR_INDEX, JSFunction, make_uri_error) \ |
| V(OBJECT_CREATE, JSFunction, object_create) \ |
| V(OBJECT_DEFINE_PROPERTIES, JSFunction, object_define_properties) \ |
| V(OBJECT_DEFINE_PROPERTY, JSFunction, object_define_property) \ |
| V(OBJECT_GET_PROTOTYPE_OF, JSFunction, object_get_prototype_of) \ |
| V(OBJECT_IS_EXTENSIBLE, JSFunction, object_is_extensible) \ |
| V(OBJECT_IS_FROZEN, JSFunction, object_is_frozen) \ |
| V(OBJECT_IS_SEALED, JSFunction, object_is_sealed) \ |
| V(OBJECT_KEYS, JSFunction, object_keys) \ |
| V(REGEXP_INTERNAL_MATCH, JSFunction, regexp_internal_match) \ |
| V(REFLECT_APPLY_INDEX, JSFunction, reflect_apply) \ |
| V(REFLECT_CONSTRUCT_INDEX, JSFunction, reflect_construct) \ |
| V(REFLECT_DEFINE_PROPERTY_INDEX, JSFunction, reflect_define_property) \ |
| V(REFLECT_DELETE_PROPERTY_INDEX, JSFunction, reflect_delete_property) \ |
| V(SPREAD_ARGUMENTS_INDEX, JSFunction, spread_arguments) \ |
| V(SPREAD_ITERABLE_INDEX, JSFunction, spread_iterable) \ |
| V(TYPED_ARRAY_CONSTRUCT_BY_ARRAY_BUFFER_INDEX, JSFunction, \ |
| typed_array_construct_by_array_buffer) \ |
| V(TYPED_ARRAY_CONSTRUCT_BY_ARRAY_LIKE_INDEX, JSFunction, \ |
| typed_array_construct_by_array_like) \ |
| V(TYPED_ARRAY_CONSTRUCT_BY_LENGTH_INDEX, JSFunction, \ |
| typed_array_construct_by_length) \ |
| V(MATH_FLOOR_INDEX, JSFunction, math_floor) \ |
| V(MATH_POW_INDEX, JSFunction, math_pow) \ |
| V(NEW_PROMISE_CAPABILITY_INDEX, JSFunction, new_promise_capability) \ |
| V(PROMISE_INTERNAL_CONSTRUCTOR_INDEX, JSFunction, \ |
| promise_internal_constructor) \ |
| V(PROMISE_INTERNAL_REJECT_INDEX, JSFunction, promise_internal_reject) \ |
| V(IS_PROMISE_INDEX, JSFunction, is_promise) \ |
| V(PROMISE_RESOLVE_INDEX, JSFunction, promise_resolve) \ |
| V(PROMISE_THEN_INDEX, JSFunction, promise_then) \ |
| V(PROMISE_HANDLE_INDEX, JSFunction, promise_handle) \ |
| V(PROMISE_HANDLE_REJECT_INDEX, JSFunction, promise_handle_reject) \ |
| V(ASYNC_GENERATOR_AWAIT_CAUGHT, JSFunction, async_generator_await_caught) \ |
| V(ASYNC_GENERATOR_AWAIT_UNCAUGHT, JSFunction, async_generator_await_uncaught) |
| |
| #define NATIVE_CONTEXT_IMPORTED_FIELDS(V) \ |
| V(ARRAY_CONCAT_INDEX, JSFunction, array_concat) \ |
| V(ARRAY_POP_INDEX, JSFunction, array_pop) \ |
| V(ARRAY_PUSH_INDEX, JSFunction, array_push) \ |
| V(ARRAY_SHIFT_INDEX, JSFunction, array_shift) \ |
| V(ARRAY_SPLICE_INDEX, JSFunction, array_splice) \ |
| V(ARRAY_SLICE_INDEX, JSFunction, array_slice) \ |
| V(ARRAY_UNSHIFT_INDEX, JSFunction, array_unshift) \ |
| 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(DERIVED_GET_TRAP_INDEX, JSFunction, derived_get_trap) \ |
| 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(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(FUNCTION_HAS_INSTANCE_INDEX, JSFunction, function_has_instance) \ |
| V(OBJECT_VALUE_OF, JSFunction, object_value_of) \ |
| V(OBJECT_TO_STRING, JSFunction, object_to_string) \ |
| 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) |
| |
| #define NATIVE_CONTEXT_JS_ARRAY_ITERATOR_MAPS(V) \ |
| V(TYPED_ARRAY_KEY_ITERATOR_MAP_INDEX, Map, typed_array_key_iterator_map) \ |
| V(FAST_ARRAY_KEY_ITERATOR_MAP_INDEX, Map, fast_array_key_iterator_map) \ |
| V(GENERIC_ARRAY_KEY_ITERATOR_MAP_INDEX, Map, array_key_iterator_map) \ |
| \ |
| V(UINT8_ARRAY_KEY_VALUE_ITERATOR_MAP_INDEX, Map, \ |
| uint8_array_key_value_iterator_map) \ |
| V(INT8_ARRAY_KEY_VALUE_ITERATOR_MAP_INDEX, Map, \ |
| int8_array_key_value_iterator_map) \ |
| V(UINT16_ARRAY_KEY_VALUE_ITERATOR_MAP_INDEX, Map, \ |
| uint16_array_key_value_iterator_map) \ |
| V(INT16_ARRAY_KEY_VALUE_ITERATOR_MAP_INDEX, Map, \ |
| int16_array_key_value_iterator_map) \ |
| V(UINT32_ARRAY_KEY_VALUE_ITERATOR_MAP_INDEX, Map, \ |
| uint32_array_key_value_iterator_map) \ |
| V(INT32_ARRAY_KEY_VALUE_ITERATOR_MAP_INDEX, Map, \ |
| int32_array_key_value_iterator_map) \ |
| V(FLOAT32_ARRAY_KEY_VALUE_ITERATOR_MAP_INDEX, Map, \ |
| float32_array_key_value_iterator_map) \ |
| V(FLOAT64_ARRAY_KEY_VALUE_ITERATOR_MAP_INDEX, Map, \ |
| float64_array_key_value_iterator_map) \ |
| V(UINT8_CLAMPED_ARRAY_KEY_VALUE_ITERATOR_MAP_INDEX, Map, \ |
| uint8_clamped_array_key_value_iterator_map) \ |
| \ |
| V(FAST_SMI_ARRAY_KEY_VALUE_ITERATOR_MAP_INDEX, Map, \ |
| fast_smi_array_key_value_iterator_map) \ |
| V(FAST_HOLEY_SMI_ARRAY_KEY_VALUE_ITERATOR_MAP_INDEX, Map, \ |
| fast_holey_smi_array_key_value_iterator_map) \ |
| V(FAST_ARRAY_KEY_VALUE_ITERATOR_MAP_INDEX, Map, \ |
| fast_array_key_value_iterator_map) \ |
| V(FAST_HOLEY_ARRAY_KEY_VALUE_ITERATOR_MAP_INDEX, Map, \ |
| fast_holey_array_key_value_iterator_map) \ |
| V(FAST_DOUBLE_ARRAY_KEY_VALUE_ITERATOR_MAP_INDEX, Map, \ |
| fast_double_array_key_value_iterator_map) \ |
| V(FAST_HOLEY_DOUBLE_ARRAY_KEY_VALUE_ITERATOR_MAP_INDEX, Map, \ |
| fast_holey_double_array_key_value_iterator_map) \ |
| V(GENERIC_ARRAY_KEY_VALUE_ITERATOR_MAP_INDEX, Map, \ |
| array_key_value_iterator_map) \ |
| \ |
| V(UINT8_ARRAY_VALUE_ITERATOR_MAP_INDEX, Map, uint8_array_value_iterator_map) \ |
| V(INT8_ARRAY_VALUE_ITERATOR_MAP_INDEX, Map, int8_array_value_iterator_map) \ |
| V(UINT16_ARRAY_VALUE_ITERATOR_MAP_INDEX, Map, \ |
| uint16_array_value_iterator_map) \ |
| V(INT16_ARRAY_VALUE_ITERATOR_MAP_INDEX, Map, int16_array_value_iterator_map) \ |
| V(UINT32_ARRAY_VALUE_ITERATOR_MAP_INDEX, Map, \ |
| uint32_array_value_iterator_map) \ |
| V(INT32_ARRAY_VALUE_ITERATOR_MAP_INDEX, Map, int32_array_value_iterator_map) \ |
| V(FLOAT32_ARRAY_VALUE_ITERATOR_MAP_INDEX, Map, \ |
| float32_array_value_iterator_map) \ |
| V(FLOAT64_ARRAY_VALUE_ITERATOR_MAP_INDEX, Map, \ |
| float64_array_value_iterator_map) \ |
| V(UINT8_CLAMPED_ARRAY_VALUE_ITERATOR_MAP_INDEX, Map, \ |
| uint8_clamped_array_value_iterator_map) \ |
| \ |
| V(FAST_SMI_ARRAY_VALUE_ITERATOR_MAP_INDEX, Map, \ |
| fast_smi_array_value_iterator_map) \ |
| V(FAST_HOLEY_SMI_ARRAY_VALUE_ITERATOR_MAP_INDEX, Map, \ |
| fast_holey_smi_array_value_iterator_map) \ |
| V(FAST_ARRAY_VALUE_ITERATOR_MAP_INDEX, Map, fast_array_value_iterator_map) \ |
| V(FAST_HOLEY_ARRAY_VALUE_ITERATOR_MAP_INDEX, Map, \ |
| fast_holey_array_value_iterator_map) \ |
| V(FAST_DOUBLE_ARRAY_VALUE_ITERATOR_MAP_INDEX, Map, \ |
| fast_double_array_value_iterator_map) \ |
| V(FAST_HOLEY_DOUBLE_ARRAY_VALUE_ITERATOR_MAP_INDEX, Map, \ |
| fast_holey_double_array_value_iterator_map) \ |
| V(GENERIC_ARRAY_VALUE_ITERATOR_MAP_INDEX, Map, array_value_iterator_map) |
| |
| #define NATIVE_CONTEXT_FIELDS(V) \ |
| V(GLOBAL_PROXY_INDEX, JSObject, global_proxy_object) \ |
| V(EMBEDDER_DATA_INDEX, FixedArray, embedder_data) \ |
| /* 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(ALLOW_WASM_EVAL_INDEX, Object, allow_wasm_eval) \ |
| 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(ASYNC_FROM_SYNC_ITERATOR_MAP_INDEX, Map, async_from_sync_iterator_map) \ |
| V(ASYNC_FUNCTION_AWAIT_REJECT_SHARED_FUN, SharedFunctionInfo, \ |
| async_function_await_reject_shared_fun) \ |
| V(ASYNC_FUNCTION_AWAIT_RESOLVE_SHARED_FUN, SharedFunctionInfo, \ |
| async_function_await_resolve_shared_fun) \ |
| V(ASYNC_FUNCTION_FUNCTION_INDEX, JSFunction, async_function_constructor) \ |
| V(ASYNC_GENERATOR_FUNCTION_FUNCTION_INDEX, JSFunction, \ |
| async_generator_function_function) \ |
| V(ASYNC_ITERATOR_VALUE_UNWRAP_SHARED_FUN, SharedFunctionInfo, \ |
| async_iterator_value_unwrap_shared_fun) \ |
| V(ASYNC_GENERATOR_AWAIT_REJECT_SHARED_FUN, SharedFunctionInfo, \ |
| async_generator_await_reject_shared_fun) \ |
| V(ASYNC_GENERATOR_AWAIT_RESOLVE_SHARED_FUN, SharedFunctionInfo, \ |
| async_generator_await_resolve_shared_fun) \ |
| V(ASYNC_GENERATOR_YIELD_RESOLVE_SHARED_FUN, SharedFunctionInfo, \ |
| async_generator_yield_resolve_shared_fun) \ |
| V(ASYNC_GENERATOR_RETURN_RESOLVE_SHARED_FUN, SharedFunctionInfo, \ |
| async_generator_return_resolve_shared_fun) \ |
| V(ASYNC_GENERATOR_RETURN_CLOSED_RESOLVE_SHARED_FUN, SharedFunctionInfo, \ |
| async_generator_return_closed_resolve_shared_fun) \ |
| V(ASYNC_GENERATOR_RETURN_CLOSED_REJECT_SHARED_FUN, SharedFunctionInfo, \ |
| async_generator_return_closed_reject_shared_fun) \ |
| V(ATOMICS_OBJECT, JSObject, atomics_object) \ |
| V(BIGINT_FUNCTION_INDEX, JSFunction, bigint_function) \ |
| 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(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(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_EXPORTS_OBJECT_INDEX, JSObject, extras_binding_object) \ |
| V(EXTRAS_UTILS_OBJECT_INDEX, Object, extras_utils_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_PROTOTYPE_INDEX, JSObject, \ |
| initial_array_iterator_prototype) \ |
| V(INITIAL_ARRAY_ITERATOR_PROTOTYPE_MAP_INDEX, Map, \ |
| initial_array_iterator_prototype_map) \ |
| 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_GENERATOR_PROTOTYPE_INDEX, JSObject, \ |
| initial_async_generator_prototype) \ |
| V(INITIAL_ITERATOR_PROTOTYPE_INDEX, JSObject, initial_iterator_prototype) \ |
| V(INITIAL_OBJECT_PROTOTYPE_INDEX, JSObject, initial_object_prototype) \ |
| V(INITIAL_STRING_PROTOTYPE_INDEX, JSObject, initial_string_prototype) \ |
| 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(INTERNAL_ARRAY_FUNCTION_INDEX, JSFunction, internal_array_function) \ |
| V(ITERATOR_RESULT_MAP_INDEX, Map, iterator_result_map) \ |
| V(INTL_DATE_TIME_FORMAT_FUNCTION_INDEX, JSFunction, \ |
| intl_date_time_format_function) \ |
| V(INTL_NUMBER_FORMAT_FUNCTION_INDEX, JSFunction, \ |
| intl_number_format_function) \ |
| V(INTL_COLLATOR_FUNCTION_INDEX, JSFunction, intl_collator_function) \ |
| V(INTL_PLURAL_RULES_FUNCTION_INDEX, JSFunction, intl_plural_rules_function) \ |
| V(INTL_V8_BREAK_ITERATOR_FUNCTION_INDEX, JSFunction, \ |
| intl_v8_break_iterator_function) \ |
| V(JS_ARRAY_PACKED_SMI_ELEMENTS_MAP_INDEX, Map, \ |
| js_array_fast_smi_elements_map_index) \ |
| V(JS_ARRAY_HOLEY_SMI_ELEMENTS_MAP_INDEX, Map, \ |
| js_array_fast_holey_smi_elements_map_index) \ |
| V(JS_ARRAY_PACKED_ELEMENTS_MAP_INDEX, Map, js_array_fast_elements_map_index) \ |
| V(JS_ARRAY_HOLEY_ELEMENTS_MAP_INDEX, Map, \ |
| js_array_fast_holey_elements_map_index) \ |
| V(JS_ARRAY_PACKED_DOUBLE_ELEMENTS_MAP_INDEX, Map, \ |
| js_array_fast_double_elements_map_index) \ |
| V(JS_ARRAY_HOLEY_DOUBLE_ELEMENTS_MAP_INDEX, Map, \ |
| js_array_fast_holey_double_elements_map_index) \ |
| 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(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_CACHE_INDEX, Object, math_random_cache) \ |
| V(MESSAGE_LISTENERS_INDEX, TemplateList, message_listeners) \ |
| V(NATIVES_UTILS_OBJECT_INDEX, Object, natives_utils_object) \ |
| 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(OPAQUE_REFERENCE_FUNCTION_INDEX, JSFunction, opaque_reference_function) \ |
| 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(PROXY_REVOKE_SHARED_FUN, SharedFunctionInfo, proxy_revoke_shared_fun) \ |
| V(PROMISE_GET_CAPABILITIES_EXECUTOR_SHARED_FUN, SharedFunctionInfo, \ |
| promise_get_capabilities_executor_shared_fun) \ |
| V(PROMISE_RESOLVE_SHARED_FUN, SharedFunctionInfo, \ |
| promise_resolve_shared_fun) \ |
| V(PROMISE_REJECT_SHARED_FUN, SharedFunctionInfo, promise_reject_shared_fun) \ |
| V(PROMISE_THEN_FINALLY_SHARED_FUN, SharedFunctionInfo, \ |
| promise_then_finally_shared_fun) \ |
| V(PROMISE_CATCH_FINALLY_SHARED_FUN, SharedFunctionInfo, \ |
| promise_catch_finally_shared_fun) \ |
| V(PROMISE_VALUE_THUNK_FINALLY_SHARED_FUN, SharedFunctionInfo, \ |
| promise_value_thunk_finally_shared_fun) \ |
| V(PROMISE_THROWER_FINALLY_SHARED_FUN, SharedFunctionInfo, \ |
| promise_thrower_finally_shared_fun) \ |
| V(PROMISE_ALL_RESOLVE_ELEMENT_SHARED_FUN, SharedFunctionInfo, \ |
| promise_all_resolve_element_shared_fun) \ |
| V(PROMISE_PROTOTYPE_MAP_INDEX, Map, promise_prototype_map) \ |
| 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_INTERNAL_MATCH_INFO_INDEX, RegExpMatchInfo, \ |
| regexp_internal_match_info) \ |
| V(REGEXP_PROTOTYPE_MAP_INDEX, Map, regexp_prototype_map) \ |
| V(REGEXP_RESULT_MAP_INDEX, Map, regexp_result_map) \ |
| V(SCRIPT_CONTEXT_TABLE_INDEX, ScriptContextTable, script_context_table) \ |
| V(SCRIPT_FUNCTION_INDEX, JSFunction, script_function) \ |
| V(SECURITY_TOKEN_INDEX, Object, security_token) \ |
| V(SELF_WEAK_CELL_INDEX, WeakCell, self_weak_cell) \ |
| 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, NumberDictionary, \ |
| slow_template_instantiations_cache) \ |
| /* 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(STRING_ITERATOR_MAP_INDEX, Map, string_iterator_map) \ |
| V(SYMBOL_FUNCTION_INDEX, JSFunction, symbol_function) \ |
| V(NATIVE_FUNCTION_MAP_INDEX, Map, native_function_map) \ |
| 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_MAP_INDEX, HeapObject, template_map) \ |
| 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) \ |
| NATIVE_CONTEXT_INTRINSIC_FUNCTIONS(V) \ |
| NATIVE_CONTEXT_IMPORTED_FIELDS(V) \ |
| NATIVE_CONTEXT_JS_ARRAY_ITERATOR_MAPS(V) |
| |
| // 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: |
| // Conversions. |
| static inline ScriptContextTable* cast(Object* context); |
| |
| struct LookupResult { |
| int context_index; |
| int slot_index; |
| VariableMode mode; |
| InitializationFlag init_flag; |
| MaybeAssignedFlag maybe_assigned_flag; |
| }; |
| |
| inline int used() const; |
| inline void set_used(int used); |
| |
| static inline Handle<Context> GetContext(Handle<ScriptContextTable> table, |
| int i); |
| |
| // 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. |
| MUST_USE_RESULT |
| static bool Lookup(Handle<ScriptContextTable> table, Handle<String> name, |
| LookupResult* result); |
| |
| MUST_USE_RESULT |
| static Handle<ScriptContextTable> Extend(Handle<ScriptContextTable> table, |
| Handle<Context> script_context); |
| |
| static const int kUsedSlotIndex = 0; |
| static const int kFirstContextSlotIndex = 1; |
| |
| DISALLOW_IMPLICIT_CONSTRUCTORS(ScriptContextTable); |
| }; |
| |
| // 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: |
| // |
| // [ closure ] This is the current function. It is the same for all |
| // contexts inside a function. It provides access to the |
| // incoming context (i.e., the outer context, which may |
| // or may not become the current function's context), and |
| // it provides access to the functions code and thus it's |
| // scope information, which in turn contains the names of |
| // statically allocated context slots. The names are needed |
| // for dynamic lookups in the presence of 'with' or 'eval'. |
| // |
| // [ previous ] A pointer to the previous context. |
| // |
| // [ extension ] Additional data. |
| // |
| // For script contexts, it contains the respective ScopeInfo. |
| // |
| // For catch contexts, it contains a ContextExtension object |
| // consisting of the ScopeInfo and the name of the catch |
| // variable. |
| // |
| // For module contexts, it contains the module object. |
| // |
| // For block contexts, it contains either the respective |
| // ScopeInfo or a ContextExtension object consisting of the |
| // ScopeInfo and an "extension object" (see below). |
| // |
| // For with contexts, it contains a ContextExtension object |
| // consisting of the ScopeInfo and 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.) |
| // |
| // [ native_context ] A pointer to the native context. |
| // |
| // In addition, function contexts 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 FixedArray { |
| public: |
| // Conversions. |
| static inline Context* cast(Object* context); |
| |
| // The default context slot layout; indices are FixedArray slot indices. |
| enum Field { |
| // These slots are in all contexts. |
| CLOSURE_INDEX, |
| PREVIOUS_INDEX, |
| // The extension slot is used for either the global object (in native |
| // contexts), eval extension object (function contexts), subject of with |
| // (with contexts), or the variable name (catch contexts), the serialized |
| // scope info (block contexts), or the module instance (module contexts). |
| EXTENSION_INDEX, |
| NATIVE_CONTEXT_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, |
| |
| MIN_CONTEXT_SLOTS = GLOBAL_PROXY_INDEX, |
| // 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_SLOTS, |
| WHITE_LIST_INDEX = MIN_CONTEXT_SLOTS + 1 |
| }; |
| |
| // 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; |
| |
| void ResetErrorsThrown(); |
| void IncrementErrorsThrown(); |
| int GetErrorsThrown(); |
| |
| // Direct slot access. |
| inline JSFunction* closure(); |
| inline void set_closure(JSFunction* closure); |
| |
| 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(); |
| ScopeInfo* scope_info(); |
| String* catch_name(); |
| |
| // Find the module context (assuming there is one) and return the associated |
| // module object. |
| Module* 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. |
| JSObject* global_proxy(); |
| void set_global_proxy(JSObject* global); |
| |
| // 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 Context* native_context() const; |
| inline void set_native_context(Context* context); |
| |
| // Predicates for context types. IsNativeContext is also defined on Object |
| // because we frequently have to know if arbitrary objects are natives |
| // contexts. |
| inline bool IsNativeContext() const; |
| inline bool IsFunctionContext() const; |
| inline bool IsCatchContext() const; |
| inline bool IsWithContext() const; |
| inline bool IsDebugEvaluateContext() const; |
| inline bool IsBlockContext() const; |
| inline bool IsModuleContext() const; |
| inline bool IsEvalContext() const; |
| inline bool IsScriptContext() const; |
| |
| inline bool HasSameSecurityTokenAs(Context* that) const; |
| |
| // The native context also stores a list of all optimized code and a |
| // list of all deoptimized code, which are needed by the deoptimizer. |
| void AddOptimizedCode(Code* code); |
| void SetOptimizedCodeListHead(Object* head); |
| Object* OptimizedCodeListHead(); |
| void SetDeoptimizedCodeListHead(Object* head); |
| Object* DeoptimizedCodeListHead(); |
| |
| Handle<Object> ErrorMessageForCodeGenerationFromStrings(); |
| |
| static int ImportedFieldIndexForName(Handle<String> name); |
| 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. |
| Handle<Object> Lookup(Handle<String> name, ContextLookupFlags flags, |
| int* index, PropertyAttributes* attributes, |
| InitializationFlag* init_flag, |
| VariableMode* variable_mode, |
| bool* is_sloppy_function_name = nullptr); |
| |
| // Code generation support. |
| static int SlotOffset(int index) { |
| return kHeaderSize + index * kPointerSize - kHeapObjectTag; |
| } |
| |
| static inline int FunctionMapIndex(LanguageMode language_mode, |
| FunctionKind kind, bool has_prototype_slot, |
| 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 kSize = kHeaderSize + NATIVE_CONTEXT_SLOTS * kPointerSize; |
| static const int kNotFound = -1; |
| |
| // GC support. |
| typedef FixedBodyDescriptor<kHeaderSize, kSize, kSize> BodyDescriptor; |
| |
| typedef FixedBodyDescriptor< |
| kHeaderSize, kHeaderSize + FIRST_WEAK_SLOT * kPointerSize, kSize> |
| BodyDescriptorWeak; |
| |
| private: |
| #ifdef DEBUG |
| // Bootstrapping-aware type checks. |
| V8_EXPORT_PRIVATE static bool IsBootstrappingOrNativeContext(Isolate* isolate, |
| Object* object); |
| static bool IsBootstrappingOrValidParentContext(Object* object, Context* kid); |
| #endif |
| |
| STATIC_ASSERT(kHeaderSize == Internals::kContextHeaderSize); |
| STATIC_ASSERT(EMBEDDER_DATA_INDEX == Internals::kContextEmbedderDataIndex); |
| }; |
| |
| typedef Context::Field ContextField; |
| |
| } // namespace internal |
| } // namespace v8 |
| |
| #endif // V8_CONTEXTS_H_ |
