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// 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, short_external_string_map, ShortExternalStringMap) \
V(Map, short_external_string_with_one_byte_data_map, \
ShortExternalStringWithOneByteDataMap) \
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, short_external_internalized_string_map, \
ShortExternalInternalizedStringMap) \
V(Map, short_external_internalized_string_with_one_byte_data_map, \
ShortExternalInternalizedStringWithOneByteDataMap) \
V(Map, short_external_one_byte_internalized_string_map, \
ShortExternalOneByteInternalizedStringMap) \
V(Map, short_external_one_byte_string_map, ShortExternalOneByteStringMap) \
/* 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(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_