diff options
Diffstat (limited to 'deps/v8/src/contexts.h')
| -rw-r--r-- | deps/v8/src/contexts.h | 384 |
1 files changed, 229 insertions, 155 deletions
diff --git a/deps/v8/src/contexts.h b/deps/v8/src/contexts.h index f33c8b16bc..dec66691d5 100644 --- a/deps/v8/src/contexts.h +++ b/deps/v8/src/contexts.h @@ -7,19 +7,21 @@ #include "src/objects/fixed-array.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, - STOP_AT_DECLARATION_SCOPE = 1 << 2, - SKIP_WITH_CONTEXT = 1 << 3, DONT_FOLLOW_CHAINS = 0, FOLLOW_CHAINS = FOLLOW_CONTEXT_CHAIN | FOLLOW_PROTOTYPE_CHAIN, @@ -27,96 +29,50 @@ enum ContextLookupFlags { // Heap-allocated activation contexts. // -// Contexts are implemented as FixedArray objects; the Context -// class is a convenience interface casted on a FixedArray object. +// 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(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(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(IS_PROMISE_INDEX, JSFunction, is_promise) \ - V(PROMISE_THEN_INDEX, JSFunction, promise_then) \ - 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_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(CANONICALIZE_LOCALE_LIST_FUNCTION_INDEX, JSFunction, \ - canonicalize_locale_list) \ - 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(CACHED_OR_NEW_SERVICE_LOCALE_FUNCTION_INDEX, JSFunction, \ - cached_or_new_service) \ - V(RESOLVE_LOCALE_FUNCTION_INDEX, JSFunction, resolve_locale) \ - 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) +#define NATIVE_CONTEXT_INTRINSIC_FUNCTIONS(V) \ + V(ASYNC_FUNCTION_PROMISE_CREATE_INDEX, JSFunction, \ + async_function_promise_create) \ + 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(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(IS_PROMISE_INDEX, JSFunction, is_promise) \ + V(PROMISE_THEN_INDEX, JSFunction, promise_then) #define NATIVE_CONTEXT_FIELDS(V) \ V(GLOBAL_PROXY_INDEX, JSGlobalProxy, global_proxy_object) \ - V(EMBEDDER_DATA_INDEX, FixedArray, embedder_data) \ + /* 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) \ /* Below is alpha-sorted */ \ V(ACCESSOR_PROPERTY_DESCRIPTOR_MAP_INDEX, Map, \ accessor_property_descriptor_map) \ @@ -125,12 +81,14 @@ enum ContextLookupFlags { 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_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_FUNCTION_OBJECT_MAP_INDEX, Map, async_function_object_map) \ V(ASYNC_GENERATOR_FUNCTION_FUNCTION_INDEX, JSFunction, \ async_generator_function_function) \ V(ASYNC_ITERATOR_VALUE_UNWRAP_SHARED_FUN, SharedFunctionInfo, \ @@ -191,8 +149,13 @@ enum ContextLookupFlags { 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, \ @@ -203,17 +166,14 @@ enum ContextLookupFlags { 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_COLLATOR_FUNCTION_INDEX, JSFunction, intl_collator_function) \ 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_LOCALE_FUNCTION_INDEX, JSFunction, intl_locale_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(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, \ @@ -229,7 +189,11 @@ enum ContextLookupFlags { 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_CELL_MAP_INDEX, Map, js_weak_cell_map) \ + V(JS_WEAK_FACTORY_CLEANUP_ITERATOR_MAP_INDEX, Map, \ + js_weak_factory_cleanup_iterator_map) \ V(JS_WEAK_MAP_FUN_INDEX, JSFunction, js_weak_map_fun) \ + V(JS_WEAK_REF_MAP_INDEX, Map, js_weak_ref_map) \ 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) \ @@ -239,7 +203,6 @@ enum ContextLookupFlags { 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(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) \ @@ -277,6 +240,7 @@ enum ContextLookupFlags { V(INITIAL_REGEXP_STRING_ITERATOR_PROTOTYPE_MAP_INDEX, Map, \ initial_regexp_string_iterator_prototype_map) \ V(REGEXP_RESULT_MAP_INDEX, Map, regexp_result_map) \ + V(REGEXP_PROTOTYPE_INDEX, JSObject, regexp_prototype) \ V(SCRIPT_CONTEXT_TABLE_INDEX, ScriptContextTable, script_context_table) \ V(SECURITY_TOKEN_INDEX, Object, security_token) \ V(SERIALIZED_OBJECTS, FixedArray, serialized_objects) \ @@ -347,8 +311,41 @@ enum ContextLookupFlags { 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) + 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(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_TO_STRING, JSFunction, object_to_string) \ + V(PROMISE_ALL_INDEX, JSFunction, promise_all) \ + 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) \ + NATIVE_CONTEXT_INTRINSIC_FUNCTIONS(V) // A table of all script contexts. Every loaded top-level script with top-level // lexical declarations contributes its ScriptContext into this table. @@ -357,8 +354,7 @@ enum ContextLookupFlags { // the subsequent slots 1..used contain ScriptContexts. class ScriptContextTable : public FixedArray { public: - // Conversions. - static inline ScriptContextTable* cast(Object* context); + DECL_CAST(ScriptContextTable) struct LookupResult { int context_index; @@ -391,7 +387,7 @@ class ScriptContextTable : public FixedArray { static const int kFirstContextSlotIndex = 1; static const int kMinLength = kFirstContextSlotIndex; - DISALLOW_IMPLICIT_CONSTRUCTORS(ScriptContextTable); + OBJECT_CONSTRUCTORS(ScriptContextTable, FixedArray); }; // JSFunctions are pairs (context, function code), sometimes also called @@ -412,11 +408,10 @@ class ScriptContextTable : public FixedArray { // // [ extension ] Additional data. // +// For native contexts, it contains the global object. // For module contexts, it contains the module object. -// -// For block contexts, it may contain an "extension object" -// (see below). -// +// For await contexts, it contains the generator object. +// For 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 @@ -440,21 +435,67 @@ class ScriptContextTable : public FixedArray { // Script contexts from all top-level scripts are gathered in // ScriptContextTable. -class Context : public FixedArray, public NeverReadOnlySpaceObject { +class Context : public HeapObject { public: - // Conversions. - static inline Context* cast(Object* context); + 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 void set(int index, Object value); + // Setter with explicit barrier mode. + V8_INLINE void set(int index, Object value, WriteBarrierMode mode); + + // Layout description. +#define CONTEXT_FIELDS(V) \ + V(kLengthOffset, kTaggedSize) \ + /* TODO(ishell): remove this fixedArray-like header size. */ \ + V(kHeaderSize, 0) \ + V(kStartOfTaggedFieldsOffset, 0) \ + V(kStartOfStrongFieldsOffset, 0) \ + /* Tagged fields. */ \ + V(kScopeInfoOffset, kTaggedSize) \ + V(kPreviousOffset, kTaggedSize) \ + V(kExtensionOffset, kTaggedSize) \ + V(kNativeContextOffset, kTaggedSize) \ + /* Header size. */ \ + /* TODO(ishell): use this as header size once MIN_CONTEXT_SLOTS */ \ + /* is removed in favour of offset-based access to common fields. */ \ + V(kTodoHeaderSize, 0) + + DEFINE_FIELD_OFFSET_CONSTANTS(HeapObject::kHeaderSize, CONTEXT_FIELDS) +#undef CONTEXT_FIELDS + + // Garbage collection support. + V8_INLINE static constexpr int SizeFor(int length) { + // TODO(ishell): switch to kTodoHeaderSize based approach once we no longer + // reference common Context fields via index + return kHeaderSize + 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; + } + // 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, - // 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), the module instance (module contexts), or - // the generator object (await contexts). EXTENSION_INDEX, NATIVE_CONTEXT_INDEX, @@ -474,7 +515,9 @@ class Context : public FixedArray, public NeverReadOnlySpaceObject { 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 = GLOBAL_PROXY_INDEX, + // This slot holds the thrown value in catch contexts. THROWN_OBJECT_INDEX = MIN_CONTEXT_SLOTS, @@ -496,44 +539,44 @@ class Context : public FixedArray, public NeverReadOnlySpaceObject { int GetErrorsThrown(); // Direct slot access. - inline void set_scope_info(ScopeInfo* scope_info); - inline Context* previous(); - inline void set_previous(Context* context); + inline void set_scope_info(ScopeInfo scope_info); + inline Context previous(); + inline void set_previous(Context context); - inline Object* next_context_link(); + 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(); + inline HeapObject extension(); + inline void set_extension(HeapObject object); + JSObject extension_object(); + JSReceiver extension_receiver(); + ScopeInfo scope_info(); // Find the module context (assuming there is one) and return the associated // module object. - Module* module(); + Module module(); // Get the context where var declarations will be hoisted to, which // may be the context itself. - Context* declaration_context(); + Context declaration_context(); bool is_declaration_context(); // Get the next closure's context on the context chain. - Context* closure_context(); + Context closure_context(); // Returns a JSGlobalProxy object or null. - JSGlobalProxy* global_proxy(); - void set_global_proxy(JSGlobalProxy* global); + JSGlobalProxy global_proxy(); + void set_global_proxy(JSGlobalProxy global); // Get the JSGlobalObject object. - V8_EXPORT_PRIVATE JSGlobalObject* global_object(); + V8_EXPORT_PRIVATE JSGlobalObject global_object(); // Get the script context by traversing the context chain. - Context* script_context(); + Context script_context(); // Compute the native context. - inline NativeContext* native_context() const; - inline void set_native_context(NativeContext* context); + inline NativeContext native_context() const; + inline void set_native_context(NativeContext context); // Predicates for context types. IsNativeContext is already defined on // Object. @@ -547,26 +590,25 @@ class Context : public FixedArray, public NeverReadOnlySpaceObject { inline bool IsEvalContext() const; inline bool IsScriptContext() const; - inline bool HasSameSecurityTokenAs(Context* that) 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(); + 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; + 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 @@ -591,16 +633,12 @@ class Context : public FixedArray, public NeverReadOnlySpaceObject { // 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 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_prototype_slot, @@ -612,32 +650,66 @@ class Context : public FixedArray, public NeverReadOnlySpaceObject { return elements_kind + FIRST_JS_ARRAY_MAP_SLOT; } - inline Map* GetInitialJSArrayMap(ElementsKind kind) const; + inline Map GetInitialJSArrayMap(ElementsKind kind) const; - static const int kSize = kHeaderSize + NATIVE_CONTEXT_SLOTS * kPointerSize; static const int kNotFound = -1; - class BodyDescriptor; + // Dispatched behavior. + DECL_PRINTER(Context) + DECL_VERIFIER(Context) + + typedef FlexibleBodyDescriptor<kStartOfTaggedFieldsOffset> BodyDescriptor; private: #ifdef DEBUG // Bootstrapping-aware type checks. V8_EXPORT_PRIVATE static bool IsBootstrappingOrNativeContext(Isolate* isolate, - Object* object); - static bool IsBootstrappingOrValidParentContext(Object* object, Context* kid); + Object object); + static bool IsBootstrappingOrValidParentContext(Object object, Context kid); #endif - STATIC_ASSERT(kHeaderSize == Internals::kContextHeaderSize); - STATIC_ASSERT(EMBEDDER_DATA_INDEX == Internals::kContextEmbedderDataIndex); + OBJECT_CONSTRUCTORS(Context, HeapObject) }; class NativeContext : public Context { public: - static inline NativeContext* cast(Object* context); + DECL_CAST(NativeContext) // TODO(neis): Move some stuff from Context here. + // [microtask_queue]: pointer to the MicrotaskQueue object. + DECL_PRIMITIVE_ACCESSORS(microtask_queue, MicrotaskQueue*) + + // 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_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::kTodoHeaderSize, + NATIVE_CONTEXT_FIELDS_DEF) +#undef NATIVE_CONTEXT_FIELDS_DEF + + class BodyDescriptor; + private: - DISALLOW_IMPLICIT_CONSTRUCTORS(NativeContext); + STATIC_ASSERT(OffsetOfElementAt(EMBEDDER_DATA_INDEX) == + Internals::kNativeContextEmbedderDataOffset); + + OBJECT_CONSTRUCTORS(NativeContext, Context); }; typedef Context::Field ContextField; @@ -645,4 +717,6 @@ typedef Context::Field ContextField; } // namespace internal } // namespace v8 +#include "src/objects/object-macros-undef.h" + #endif // V8_CONTEXTS_H_ |