| // Copyright 2018 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_ROOTS_H_ |
| #define V8_ROOTS_H_ |
| |
| #include "src/handles.h" |
| #include "src/heap-symbols.h" |
| #include "src/objects-definitions.h" |
| |
| namespace v8 { |
| |
| namespace internal { |
| |
| // Defines all the read-only roots in Heap. |
| #define STRONG_READ_ONLY_ROOT_LIST(V) \ |
| /* Cluster the most popular ones in a few cache lines here at the top. */ \ |
| /* The first 32 entries are most often used in the startup snapshot and */ \ |
| /* can use a shorter representation in the serialization format. */ \ |
| V(Map, free_space_map, FreeSpaceMap) \ |
| V(Map, one_pointer_filler_map, OnePointerFillerMap) \ |
| V(Map, two_pointer_filler_map, TwoPointerFillerMap) \ |
| V(Oddball, uninitialized_value, UninitializedValue) \ |
| V(Oddball, undefined_value, UndefinedValue) \ |
| V(Oddball, the_hole_value, TheHoleValue) \ |
| V(Oddball, null_value, NullValue) \ |
| V(Oddball, true_value, TrueValue) \ |
| V(Oddball, false_value, FalseValue) \ |
| V(String, empty_string, empty_string) \ |
| V(Map, meta_map, MetaMap) \ |
| V(Map, byte_array_map, ByteArrayMap) \ |
| V(Map, fixed_array_map, FixedArrayMap) \ |
| V(Map, fixed_cow_array_map, FixedCOWArrayMap) \ |
| V(Map, hash_table_map, HashTableMap) \ |
| V(Map, symbol_map, SymbolMap) \ |
| V(Map, one_byte_string_map, OneByteStringMap) \ |
| V(Map, one_byte_internalized_string_map, OneByteInternalizedStringMap) \ |
| V(Map, scope_info_map, ScopeInfoMap) \ |
| V(Map, shared_function_info_map, SharedFunctionInfoMap) \ |
| V(Map, code_map, CodeMap) \ |
| V(Map, function_context_map, FunctionContextMap) \ |
| V(Map, cell_map, CellMap) \ |
| V(Map, global_property_cell_map, GlobalPropertyCellMap) \ |
| V(Map, foreign_map, ForeignMap) \ |
| V(Map, heap_number_map, HeapNumberMap) \ |
| V(Map, transition_array_map, TransitionArrayMap) \ |
| V(Map, feedback_vector_map, FeedbackVectorMap) \ |
| V(ScopeInfo, empty_scope_info, EmptyScopeInfo) \ |
| V(FixedArray, empty_fixed_array, EmptyFixedArray) \ |
| V(DescriptorArray, empty_descriptor_array, EmptyDescriptorArray) \ |
| /* Entries beyond the first 32 */ \ |
| /* The roots above this line should be boring from a GC point of view. */ \ |
| /* This means they are never in new space and never on a page that is */ \ |
| /* being compacted.*/ \ |
| /* Oddballs */ \ |
| V(Oddball, arguments_marker, ArgumentsMarker) \ |
| V(Oddball, exception, Exception) \ |
| V(Oddball, termination_exception, TerminationException) \ |
| V(Oddball, optimized_out, OptimizedOut) \ |
| V(Oddball, stale_register, StaleRegister) \ |
| /* Context maps */ \ |
| V(Map, native_context_map, NativeContextMap) \ |
| V(Map, module_context_map, ModuleContextMap) \ |
| V(Map, eval_context_map, EvalContextMap) \ |
| V(Map, script_context_map, ScriptContextMap) \ |
| V(Map, block_context_map, BlockContextMap) \ |
| V(Map, catch_context_map, CatchContextMap) \ |
| V(Map, with_context_map, WithContextMap) \ |
| V(Map, debug_evaluate_context_map, DebugEvaluateContextMap) \ |
| V(Map, script_context_table_map, ScriptContextTableMap) \ |
| /* Maps */ \ |
| V(Map, feedback_metadata_map, FeedbackMetadataArrayMap) \ |
| V(Map, array_list_map, ArrayListMap) \ |
| V(Map, bigint_map, BigIntMap) \ |
| V(Map, object_boilerplate_description_map, ObjectBoilerplateDescriptionMap) \ |
| V(Map, bytecode_array_map, BytecodeArrayMap) \ |
| V(Map, code_data_container_map, CodeDataContainerMap) \ |
| V(Map, descriptor_array_map, DescriptorArrayMap) \ |
| V(Map, fixed_double_array_map, FixedDoubleArrayMap) \ |
| V(Map, global_dictionary_map, GlobalDictionaryMap) \ |
| V(Map, many_closures_cell_map, ManyClosuresCellMap) \ |
| V(Map, module_info_map, ModuleInfoMap) \ |
| V(Map, mutable_heap_number_map, MutableHeapNumberMap) \ |
| V(Map, name_dictionary_map, NameDictionaryMap) \ |
| V(Map, no_closures_cell_map, NoClosuresCellMap) \ |
| V(Map, number_dictionary_map, NumberDictionaryMap) \ |
| V(Map, one_closure_cell_map, OneClosureCellMap) \ |
| V(Map, ordered_hash_map_map, OrderedHashMapMap) \ |
| V(Map, ordered_hash_set_map, OrderedHashSetMap) \ |
| V(Map, pre_parsed_scope_data_map, PreParsedScopeDataMap) \ |
| V(Map, property_array_map, PropertyArrayMap) \ |
| V(Map, side_effect_call_handler_info_map, SideEffectCallHandlerInfoMap) \ |
| V(Map, side_effect_free_call_handler_info_map, \ |
| SideEffectFreeCallHandlerInfoMap) \ |
| V(Map, next_call_side_effect_free_call_handler_info_map, \ |
| NextCallSideEffectFreeCallHandlerInfoMap) \ |
| V(Map, simple_number_dictionary_map, SimpleNumberDictionaryMap) \ |
| V(Map, sloppy_arguments_elements_map, SloppyArgumentsElementsMap) \ |
| V(Map, small_ordered_hash_map_map, SmallOrderedHashMapMap) \ |
| V(Map, small_ordered_hash_set_map, SmallOrderedHashSetMap) \ |
| V(Map, string_table_map, StringTableMap) \ |
| V(Map, uncompiled_data_without_pre_parsed_scope_map, \ |
| UncompiledDataWithoutPreParsedScopeMap) \ |
| V(Map, uncompiled_data_with_pre_parsed_scope_map, \ |
| UncompiledDataWithPreParsedScopeMap) \ |
| V(Map, weak_fixed_array_map, WeakFixedArrayMap) \ |
| V(Map, weak_array_list_map, WeakArrayListMap) \ |
| V(Map, ephemeron_hash_table_map, EphemeronHashTableMap) \ |
| /* String maps */ \ |
| V(Map, native_source_string_map, NativeSourceStringMap) \ |
| V(Map, string_map, StringMap) \ |
| V(Map, cons_one_byte_string_map, ConsOneByteStringMap) \ |
| V(Map, cons_string_map, ConsStringMap) \ |
| V(Map, thin_one_byte_string_map, ThinOneByteStringMap) \ |
| V(Map, thin_string_map, ThinStringMap) \ |
| V(Map, sliced_string_map, SlicedStringMap) \ |
| V(Map, sliced_one_byte_string_map, SlicedOneByteStringMap) \ |
| V(Map, external_string_map, ExternalStringMap) \ |
| V(Map, external_string_with_one_byte_data_map, \ |
| ExternalStringWithOneByteDataMap) \ |
| V(Map, external_one_byte_string_map, ExternalOneByteStringMap) \ |
| V(Map, uncached_external_string_map, UncachedExternalStringMap) \ |
| V(Map, uncached_external_string_with_one_byte_data_map, \ |
| UncachedExternalStringWithOneByteDataMap) \ |
| V(Map, internalized_string_map, InternalizedStringMap) \ |
| V(Map, external_internalized_string_map, ExternalInternalizedStringMap) \ |
| V(Map, external_internalized_string_with_one_byte_data_map, \ |
| ExternalInternalizedStringWithOneByteDataMap) \ |
| V(Map, external_one_byte_internalized_string_map, \ |
| ExternalOneByteInternalizedStringMap) \ |
| V(Map, uncached_external_internalized_string_map, \ |
| UncachedExternalInternalizedStringMap) \ |
| V(Map, uncached_external_internalized_string_with_one_byte_data_map, \ |
| UncachedExternalInternalizedStringWithOneByteDataMap) \ |
| V(Map, uncached_external_one_byte_internalized_string_map, \ |
| UncachedExternalOneByteInternalizedStringMap) \ |
| V(Map, uncached_external_one_byte_string_map, \ |
| UncachedExternalOneByteStringMap) \ |
| /* Array element maps */ \ |
| V(Map, fixed_uint8_array_map, FixedUint8ArrayMap) \ |
| V(Map, fixed_int8_array_map, FixedInt8ArrayMap) \ |
| V(Map, fixed_uint16_array_map, FixedUint16ArrayMap) \ |
| V(Map, fixed_int16_array_map, FixedInt16ArrayMap) \ |
| V(Map, fixed_uint32_array_map, FixedUint32ArrayMap) \ |
| V(Map, fixed_int32_array_map, FixedInt32ArrayMap) \ |
| V(Map, fixed_float32_array_map, FixedFloat32ArrayMap) \ |
| V(Map, fixed_float64_array_map, FixedFloat64ArrayMap) \ |
| V(Map, fixed_uint8_clamped_array_map, FixedUint8ClampedArrayMap) \ |
| V(Map, fixed_biguint64_array_map, FixedBigUint64ArrayMap) \ |
| V(Map, fixed_bigint64_array_map, FixedBigInt64ArrayMap) \ |
| /* Oddball maps */ \ |
| V(Map, undefined_map, UndefinedMap) \ |
| V(Map, the_hole_map, TheHoleMap) \ |
| V(Map, null_map, NullMap) \ |
| V(Map, boolean_map, BooleanMap) \ |
| V(Map, uninitialized_map, UninitializedMap) \ |
| V(Map, arguments_marker_map, ArgumentsMarkerMap) \ |
| V(Map, exception_map, ExceptionMap) \ |
| V(Map, termination_exception_map, TerminationExceptionMap) \ |
| V(Map, optimized_out_map, OptimizedOutMap) \ |
| V(Map, stale_register_map, StaleRegisterMap) \ |
| V(Map, self_reference_marker_map, SelfReferenceMarkerMap) \ |
| /* Canonical empty values */ \ |
| V(EnumCache, empty_enum_cache, EmptyEnumCache) \ |
| V(PropertyArray, empty_property_array, EmptyPropertyArray) \ |
| V(ByteArray, empty_byte_array, EmptyByteArray) \ |
| V(ObjectBoilerplateDescription, empty_object_boilerplate_description, \ |
| EmptyObjectBoilerplateDescription) \ |
| V(ArrayBoilerplateDescription, empty_array_boilerplate_description, \ |
| EmptyArrayBoilerplateDescription) \ |
| V(FixedTypedArrayBase, empty_fixed_uint8_array, EmptyFixedUint8Array) \ |
| V(FixedTypedArrayBase, empty_fixed_int8_array, EmptyFixedInt8Array) \ |
| V(FixedTypedArrayBase, empty_fixed_uint16_array, EmptyFixedUint16Array) \ |
| V(FixedTypedArrayBase, empty_fixed_int16_array, EmptyFixedInt16Array) \ |
| V(FixedTypedArrayBase, empty_fixed_uint32_array, EmptyFixedUint32Array) \ |
| V(FixedTypedArrayBase, empty_fixed_int32_array, EmptyFixedInt32Array) \ |
| V(FixedTypedArrayBase, empty_fixed_float32_array, EmptyFixedFloat32Array) \ |
| V(FixedTypedArrayBase, empty_fixed_float64_array, EmptyFixedFloat64Array) \ |
| V(FixedTypedArrayBase, empty_fixed_uint8_clamped_array, \ |
| EmptyFixedUint8ClampedArray) \ |
| V(FixedTypedArrayBase, empty_fixed_biguint64_array, \ |
| EmptyFixedBigUint64Array) \ |
| V(FixedTypedArrayBase, empty_fixed_bigint64_array, EmptyFixedBigInt64Array) \ |
| V(FixedArray, empty_sloppy_arguments_elements, EmptySloppyArgumentsElements) \ |
| V(NumberDictionary, empty_slow_element_dictionary, \ |
| EmptySlowElementDictionary) \ |
| V(FixedArray, empty_ordered_hash_map, EmptyOrderedHashMap) \ |
| V(FixedArray, empty_ordered_hash_set, EmptyOrderedHashSet) \ |
| V(FeedbackMetadata, empty_feedback_metadata, EmptyFeedbackMetadata) \ |
| V(PropertyCell, empty_property_cell, EmptyPropertyCell) \ |
| V(InterceptorInfo, noop_interceptor_info, NoOpInterceptorInfo) \ |
| V(WeakFixedArray, empty_weak_fixed_array, EmptyWeakFixedArray) \ |
| V(WeakArrayList, empty_weak_array_list, EmptyWeakArrayList) \ |
| /* Special numbers */ \ |
| V(HeapNumber, nan_value, NanValue) \ |
| V(HeapNumber, hole_nan_value, HoleNanValue) \ |
| V(HeapNumber, infinity_value, InfinityValue) \ |
| V(HeapNumber, minus_zero_value, MinusZeroValue) \ |
| V(HeapNumber, minus_infinity_value, MinusInfinityValue) \ |
| /* Marker for self-references during code-generation */ \ |
| V(HeapObject, self_reference_marker, SelfReferenceMarker) |
| |
| #define STRONG_MUTABLE_ROOT_LIST(V) \ |
| /* Maps */ \ |
| V(Map, external_map, ExternalMap) \ |
| V(Map, message_object_map, JSMessageObjectMap) \ |
| /* Canonical empty values */ \ |
| V(Script, empty_script, EmptyScript) \ |
| V(FeedbackCell, many_closures_cell, ManyClosuresCell) \ |
| V(Cell, invalid_prototype_validity_cell, InvalidPrototypeValidityCell) \ |
| /* Protectors */ \ |
| V(Cell, array_constructor_protector, ArrayConstructorProtector) \ |
| V(PropertyCell, no_elements_protector, NoElementsProtector) \ |
| V(Cell, is_concat_spreadable_protector, IsConcatSpreadableProtector) \ |
| V(PropertyCell, array_species_protector, ArraySpeciesProtector) \ |
| V(PropertyCell, typed_array_species_protector, TypedArraySpeciesProtector) \ |
| V(PropertyCell, promise_species_protector, PromiseSpeciesProtector) \ |
| V(Cell, string_length_protector, StringLengthProtector) \ |
| V(PropertyCell, array_iterator_protector, ArrayIteratorProtector) \ |
| V(PropertyCell, array_buffer_neutering_protector, \ |
| ArrayBufferNeuteringProtector) \ |
| V(PropertyCell, promise_hook_protector, PromiseHookProtector) \ |
| V(Cell, promise_resolve_protector, PromiseResolveProtector) \ |
| V(PropertyCell, promise_then_protector, PromiseThenProtector) \ |
| /* Caches */ \ |
| V(FixedArray, number_string_cache, NumberStringCache) \ |
| V(FixedArray, single_character_string_cache, SingleCharacterStringCache) \ |
| V(FixedArray, string_split_cache, StringSplitCache) \ |
| V(FixedArray, regexp_multiple_cache, RegExpMultipleCache) \ |
| /* Lists and dictionaries */ \ |
| V(NameDictionary, empty_property_dictionary, EmptyPropertyDictionary) \ |
| V(NameDictionary, public_symbol_table, PublicSymbolTable) \ |
| V(NameDictionary, api_symbol_table, ApiSymbolTable) \ |
| V(NameDictionary, api_private_symbol_table, ApiPrivateSymbolTable) \ |
| V(WeakArrayList, script_list, ScriptList) \ |
| V(SimpleNumberDictionary, code_stubs, CodeStubs) \ |
| V(FixedArray, materialized_objects, MaterializedObjects) \ |
| V(FixedArray, microtask_queue, MicrotaskQueue) \ |
| V(WeakArrayList, detached_contexts, DetachedContexts) \ |
| V(WeakArrayList, retaining_path_targets, RetainingPathTargets) \ |
| V(WeakArrayList, retained_maps, RetainedMaps) \ |
| /* Indirection lists for isolate-independent builtins */ \ |
| V(FixedArray, builtins_constants_table, BuiltinsConstantsTable) \ |
| /* Feedback vectors that we need for code coverage or type profile */ \ |
| V(Object, feedback_vectors_for_profiling_tools, \ |
| FeedbackVectorsForProfilingTools) \ |
| V(WeakArrayList, noscript_shared_function_infos, \ |
| NoScriptSharedFunctionInfos) \ |
| V(FixedArray, serialized_objects, SerializedObjects) \ |
| V(FixedArray, serialized_global_proxy_sizes, SerializedGlobalProxySizes) \ |
| V(TemplateList, message_listeners, MessageListeners) \ |
| /* DeserializeLazy handlers for lazy bytecode deserialization */ \ |
| V(Object, deserialize_lazy_handler, DeserializeLazyHandler) \ |
| V(Object, deserialize_lazy_handler_wide, DeserializeLazyHandlerWide) \ |
| V(Object, deserialize_lazy_handler_extra_wide, \ |
| DeserializeLazyHandlerExtraWide) \ |
| /* Hash seed */ \ |
| V(ByteArray, hash_seed, HashSeed) \ |
| /* JS Entries */ \ |
| V(Code, js_entry_code, JsEntryCode) \ |
| V(Code, js_construct_entry_code, JsConstructEntryCode) \ |
| V(Code, js_run_microtasks_entry_code, JsRunMicrotasksEntryCode) |
| |
| #define STRONG_ROOT_LIST(V) \ |
| STRONG_READ_ONLY_ROOT_LIST(V) \ |
| STRONG_MUTABLE_ROOT_LIST(V) |
| |
| // Entries in this list are limited to Smis and are not visited during GC. |
| #define SMI_ROOT_LIST(V) \ |
| V(Smi, stack_limit, StackLimit) \ |
| V(Smi, real_stack_limit, RealStackLimit) \ |
| V(Smi, last_script_id, LastScriptId) \ |
| V(Smi, last_debugging_id, LastDebuggingId) \ |
| /* To distinguish the function templates, so that we can find them in the */ \ |
| /* function cache of the native context. */ \ |
| V(Smi, next_template_serial_number, NextTemplateSerialNumber) \ |
| V(Smi, arguments_adaptor_deopt_pc_offset, ArgumentsAdaptorDeoptPCOffset) \ |
| V(Smi, construct_stub_create_deopt_pc_offset, \ |
| ConstructStubCreateDeoptPCOffset) \ |
| V(Smi, construct_stub_invoke_deopt_pc_offset, \ |
| ConstructStubInvokeDeoptPCOffset) \ |
| V(Smi, interpreter_entry_return_pc_offset, InterpreterEntryReturnPCOffset) |
| |
| #define MUTABLE_ROOT_LIST(V) \ |
| STRONG_MUTABLE_ROOT_LIST(V) \ |
| SMI_ROOT_LIST(V) \ |
| V(StringTable, string_table, StringTable) |
| |
| #define ROOT_LIST(V) \ |
| MUTABLE_ROOT_LIST(V) \ |
| STRONG_READ_ONLY_ROOT_LIST(V) |
| |
| class FixedTypedArrayBase; |
| class Heap; |
| class Isolate; |
| class Map; |
| class String; |
| class Symbol; |
| |
| class ReadOnlyRoots { |
| public: |
| explicit ReadOnlyRoots(Heap* heap) : heap_(heap) {} |
| inline explicit ReadOnlyRoots(Isolate* isolate); |
| |
| #define ROOT_ACCESSOR(type, name, camel_name) \ |
| inline class type* name(); \ |
| inline Handle<type> name##_handle(); |
| STRONG_READ_ONLY_ROOT_LIST(ROOT_ACCESSOR) |
| #undef ROOT_ACCESSOR |
| |
| #define STRING_ACCESSOR(name, str) \ |
| inline String* name(); \ |
| inline Handle<String> name##_handle(); |
| INTERNALIZED_STRING_LIST(STRING_ACCESSOR) |
| #undef STRING_ACCESSOR |
| |
| #define SYMBOL_ACCESSOR(name) \ |
| inline Symbol* name(); \ |
| inline Handle<Symbol> name##_handle(); |
| PRIVATE_SYMBOL_LIST(SYMBOL_ACCESSOR) |
| #undef SYMBOL_ACCESSOR |
| |
| #define SYMBOL_ACCESSOR(name, description) \ |
| inline Symbol* name(); \ |
| inline Handle<Symbol> name##_handle(); |
| PUBLIC_SYMBOL_LIST(SYMBOL_ACCESSOR) |
| WELL_KNOWN_SYMBOL_LIST(SYMBOL_ACCESSOR) |
| #undef SYMBOL_ACCESSOR |
| |
| // Utility type maps. |
| #define STRUCT_MAP_ACCESSOR(NAME, Name, name) \ |
| inline Map* name##_map(); \ |
| inline class Handle<Map> name##_map_handle(); |
| STRUCT_LIST(STRUCT_MAP_ACCESSOR) |
| #undef STRUCT_MAP_ACCESSOR |
| |
| #define ALLOCATION_SITE_MAP_ACCESSOR(NAME, Name, Size, name) \ |
| inline Map* name##_map(); \ |
| inline class Handle<Map> name##_map_handle(); |
| ALLOCATION_SITE_LIST(ALLOCATION_SITE_MAP_ACCESSOR) |
| #undef ALLOCATION_SITE_MAP_ACCESSOR |
| |
| inline FixedTypedArrayBase* EmptyFixedTypedArrayForMap(const Map* map); |
| |
| private: |
| Heap* heap_; |
| }; |
| |
| } // namespace internal |
| } // namespace v8 |
| |
| #endif // V8_ROOTS_H_ |
