text: // 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_OBJECTS_OBJECTS_DEFINITIONS_H_
  #define V8_OBJECTS_OBJECTS_DEFINITIONS_H_
  
  #include "src/init/heap-symbols.h"
  #include "torque-generated/instance-types.h"
  
  namespace v8 {
  
  namespace internal {
  
  // All Maps have a field instance_type containing a InstanceType.
  // It describes the type of the instances.
  //
  // As an example, a JavaScript object is a heap object and its map
  // instance_type is JS_OBJECT_TYPE.
  //
  // The names of the string instance types are intended to systematically
  // mirror their encoding in the instance_type field of the map.  The default
  // encoding is considered TWO_BYTE.  It is not mentioned in the name.  ONE_BYTE
  // encoding is mentioned explicitly in the name.  Likewise, the default
  // representation is considered sequential.  It is not mentioned in the
  // name.  The other representations (e.g. CONS, EXTERNAL) are explicitly
  // mentioned.  Finally, the string is either a STRING_TYPE (if it is a normal
  // string) or a INTERNALIZED_STRING_TYPE (if it is a internalized string).
  //
  // NOTE: The following things are some that depend on the string types having
  // instance_types that are less than those of all other types:
  // HeapObject::Size, HeapObject::IterateBody, the typeof operator, and
  // Object::IsString.
  #define INSTANCE_TYPE_LIST_BASE(V)                       \
    V(INTERNALIZED_STRING_TYPE)                            \
    V(EXTERNAL_INTERNALIZED_STRING_TYPE)                   \
    V(ONE_BYTE_INTERNALIZED_STRING_TYPE)                   \
    V(EXTERNAL_ONE_BYTE_INTERNALIZED_STRING_TYPE)          \
    V(UNCACHED_EXTERNAL_INTERNALIZED_STRING_TYPE)          \
    V(UNCACHED_EXTERNAL_ONE_BYTE_INTERNALIZED_STRING_TYPE) \
    V(STRING_TYPE)                                         \
    V(CONS_STRING_TYPE)                                    \
    V(EXTERNAL_STRING_TYPE)                                \
    V(SLICED_STRING_TYPE)                                  \
    V(THIN_STRING_TYPE)                                    \
    V(ONE_BYTE_STRING_TYPE)                                \
    V(CONS_ONE_BYTE_STRING_TYPE)                           \
    V(EXTERNAL_ONE_BYTE_STRING_TYPE)                       \
    V(SLICED_ONE_BYTE_STRING_TYPE)                         \
    V(THIN_ONE_BYTE_STRING_TYPE)                           \
    V(UNCACHED_EXTERNAL_STRING_TYPE)                       \
    V(UNCACHED_EXTERNAL_ONE_BYTE_STRING_TYPE)
  
  #define INSTANCE_TYPE_LIST(V) \
    INSTANCE_TYPE_LIST_BASE(V)  \
    TORQUE_ASSIGNED_INSTANCE_TYPE_LIST(V)
  
  // Since string types are not consecutive, this macro is used to
  // iterate over them.
  #define STRING_TYPE_LIST(V)                                                    \
    V(STRING_TYPE, kVariableSizeSentinel, string, String)                        \
    V(ONE_BYTE_STRING_TYPE, kVariableSizeSentinel, one_byte_string,              \
      OneByteString)                                                             \
    V(CONS_STRING_TYPE, ConsString::kSize, cons_string, ConsString)              \
    V(CONS_ONE_BYTE_STRING_TYPE, ConsString::kSize, cons_one_byte_string,        \
      ConsOneByteString)                                                         \
    V(SLICED_STRING_TYPE, SlicedString::kSize, sliced_string, SlicedString)      \
    V(SLICED_ONE_BYTE_STRING_TYPE, SlicedString::kSize, sliced_one_byte_string,  \
      SlicedOneByteString)                                                       \
    V(EXTERNAL_STRING_TYPE, ExternalTwoByteString::kSize, external_string,       \
      ExternalString)                                                            \
    V(EXTERNAL_ONE_BYTE_STRING_TYPE, ExternalOneByteString::kSize,               \
      external_one_byte_string, ExternalOneByteString)                           \
    V(UNCACHED_EXTERNAL_STRING_TYPE, ExternalTwoByteString::kUncachedSize,       \
      uncached_external_string, UncachedExternalString)                          \
    V(UNCACHED_EXTERNAL_ONE_BYTE_STRING_TYPE,                                    \
      ExternalOneByteString::kUncachedSize, uncached_external_one_byte_string,   \
      UncachedExternalOneByteString)                                             \
                                                                                 \
    V(INTERNALIZED_STRING_TYPE, kVariableSizeSentinel, internalized_string,      \
      InternalizedString)                                                        \
    V(ONE_BYTE_INTERNALIZED_STRING_TYPE, kVariableSizeSentinel,                  \
      one_byte_internalized_string, OneByteInternalizedString)                   \
    V(EXTERNAL_INTERNALIZED_STRING_TYPE, ExternalTwoByteString::kSize,           \
      external_internalized_string, ExternalInternalizedString)                  \
    V(EXTERNAL_ONE_BYTE_INTERNALIZED_STRING_TYPE, ExternalOneByteString::kSize,  \
      external_one_byte_internalized_string, ExternalOneByteInternalizedString)  \
    V(UNCACHED_EXTERNAL_INTERNALIZED_STRING_TYPE,                                \
      ExternalTwoByteString::kUncachedSize,                                      \
      uncached_external_internalized_string, UncachedExternalInternalizedString) \
    V(UNCACHED_EXTERNAL_ONE_BYTE_INTERNALIZED_STRING_TYPE,                       \
      ExternalOneByteString::kUncachedSize,                                      \
      uncached_external_one_byte_internalized_string,                            \
      UncachedExternalOneByteInternalizedString)                                 \
    V(THIN_STRING_TYPE, ThinString::kSize, thin_string, ThinString)              \
    V(THIN_ONE_BYTE_STRING_TYPE, ThinString::kSize, thin_one_byte_string,        \
      ThinOneByteString)
  
  // A struct is a simple object a set of object-valued fields.  Including an
  // object type in this causes the compiler to generate most of the boilerplate
  // code for the class including allocation and garbage collection routines,
  // casts and predicates.  All you need to define is the class, methods and
  // object verification routines.  Easy, no?
  #define STRUCT_LIST_GENERATOR_BASE(V, _)                                      \
    V(_, PROMISE_FULFILL_REACTION_JOB_TASK_TYPE, PromiseFulfillReactionJobTask, \
      promise_fulfill_reaction_job_task)                                        \
    V(_, PROMISE_REJECT_REACTION_JOB_TASK_TYPE, PromiseRejectReactionJobTask,   \
      promise_reject_reaction_job_task)                                         \
    V(_, CALLABLE_TASK_TYPE, CallableTask, callable_task)                       \
    V(_, CALLBACK_TASK_TYPE, CallbackTask, callback_task)                       \
    V(_, PROMISE_RESOLVE_THENABLE_JOB_TASK_TYPE, PromiseResolveThenableJobTask, \
      promise_resolve_thenable_job_task)                                        \
    V(_, FUNCTION_TEMPLATE_INFO_TYPE, FunctionTemplateInfo,                     \
      function_template_info)                                                   \
    V(_, OBJECT_TEMPLATE_INFO_TYPE, ObjectTemplateInfo, object_template_info)   \
    V(_, ACCESS_CHECK_INFO_TYPE, AccessCheckInfo, access_check_info)            \
    V(_, ACCESSOR_INFO_TYPE, AccessorInfo, accessor_info)                       \
    V(_, ACCESSOR_PAIR_TYPE, AccessorPair, accessor_pair)                       \
    V(_, ALIASED_ARGUMENTS_ENTRY_TYPE, AliasedArgumentsEntry,                   \
      aliased_arguments_entry)                                                  \
    V(_, ALLOCATION_MEMENTO_TYPE, AllocationMemento, allocation_memento)        \
    V(_, ARRAY_BOILERPLATE_DESCRIPTION_TYPE, ArrayBoilerplateDescription,       \
      array_boilerplate_description)                                            \
    V(_, ASM_WASM_DATA_TYPE, AsmWasmData, asm_wasm_data)                        \
    V(_, ASYNC_GENERATOR_REQUEST_TYPE, AsyncGeneratorRequest,                   \
      async_generator_request)                                                  \
    V(_, BREAK_POINT_TYPE, BreakPoint, break_point)                             \
    V(_, BREAK_POINT_INFO_TYPE, BreakPointInfo, break_point_info)               \
    V(_, CACHED_TEMPLATE_OBJECT_TYPE, CachedTemplateObject,                     \
      cached_template_object)                                                   \
    V(_, CLASS_POSITIONS_TYPE, ClassPositions, class_positions)                 \
    V(_, DEBUG_INFO_TYPE, DebugInfo, debug_info)                                \
    V(_, ENUM_CACHE_TYPE, EnumCache, enum_cache)                                \
    V(_, FUNCTION_TEMPLATE_RARE_DATA_TYPE, FunctionTemplateRareData,            \
      function_template_rare_data)                                              \
    V(_, INTERCEPTOR_INFO_TYPE, InterceptorInfo, interceptor_info)              \
    V(_, INTERPRETER_DATA_TYPE, InterpreterData, interpreter_data)              \
    V(_, PROMISE_CAPABILITY_TYPE, PromiseCapability, promise_capability)        \
    V(_, PROMISE_REACTION_TYPE, PromiseReaction, promise_reaction)              \
    V(_, PROPERTY_DESCRIPTOR_OBJECT_TYPE, PropertyDescriptorObject,             \
      property_descriptor_object)                                               \
    V(_, PROTOTYPE_INFO_TYPE, PrototypeInfo, prototype_info)                    \
    V(_, SCRIPT_TYPE, Script, script)                                           \
    V(_, SOURCE_TEXT_MODULE_INFO_ENTRY_TYPE, SourceTextModuleInfoEntry,         \
      module_info_entry)                                                        \
    V(_, STACK_FRAME_INFO_TYPE, StackFrameInfo, stack_frame_info)               \
    V(_, STACK_TRACE_FRAME_TYPE, StackTraceFrame, stack_trace_frame)            \
    V(_, TEMPLATE_OBJECT_DESCRIPTION_TYPE, TemplateObjectDescription,           \
      template_object_description)                                              \
    V(_, TUPLE2_TYPE, Tuple2, tuple2)                                           \
    V(_, WASM_EXCEPTION_TAG_TYPE, WasmExceptionTag, wasm_exception_tag)         \
    V(_, WASM_EXPORTED_FUNCTION_DATA_TYPE, WasmExportedFunctionData,            \
      wasm_exported_function_data)                                              \
    V(_, WASM_INDIRECT_FUNCTION_TABLE_TYPE, WasmIndirectFunctionTable,          \
      wasm_indirect_function_table)                                             \
    V(_, WASM_JS_FUNCTION_DATA_TYPE, WasmJSFunctionData, wasm_js_function_data) \
    V(_, WASM_VALUE_TYPE, WasmValue, wasm_value)
  
  #define STRUCT_LIST_GENERATOR(V, _) STRUCT_LIST_GENERATOR_BASE(V, _)
  
  // Adapts one STRUCT_LIST_GENERATOR entry to the STRUCT_LIST entry
  #define STRUCT_LIST_ADAPTER(V, NAME, Name, name) V(NAME, Name, name)
  
  // Produces (NAME, Name, name) entries.
  #define STRUCT_LIST(V) STRUCT_LIST_GENERATOR(STRUCT_LIST_ADAPTER, V)
  
  // Adapts one STRUCT_LIST_GENERATOR entry to the STRUCT_MAPS_LIST entry
  #define STRUCT_MAPS_LIST_ADAPTER(V, NAME, Name, name) \
    V(Map, name##_map, Name##Map)
  
  // Produces (Map, struct_name_map, StructNameMap) entries
  #define STRUCT_MAPS_LIST(V) STRUCT_LIST_GENERATOR(STRUCT_MAPS_LIST_ADAPTER, V)
  
  //
  // The following macros define list of allocation size objects and list of
  // their maps.
  //
  #define ALLOCATION_SITE_LIST(V, _)                                          \
    V(_, ALLOCATION_SITE_TYPE, AllocationSite, WithWeakNext, allocation_site) \
    V(_, ALLOCATION_SITE_TYPE, AllocationSite, WithoutWeakNext,               \
      allocation_site_without_weaknext)
  
  // Adapts one ALLOCATION_SITE_LIST entry to the ALLOCATION_SITE_MAPS_LIST entry
  #define ALLOCATION_SITE_MAPS_LIST_ADAPTER(V, TYPE, Name, Size, name_size) \
    V(Map, name_size##_map, Name##Size##Map)
  
  // Produces (Map, allocation_site_name_map, AllocationSiteNameMap) entries
  #define ALLOCATION_SITE_MAPS_LIST(V) \
    ALLOCATION_SITE_LIST(ALLOCATION_SITE_MAPS_LIST_ADAPTER, V)
  
  //
  // The following macros define list of data handler objects and list of their
  // maps.
  //
  #define DATA_HANDLER_LIST(V, _)                             \
    V(_, LOAD_HANDLER_TYPE, LoadHandler, 1, load_handler1)    \
    V(_, LOAD_HANDLER_TYPE, LoadHandler, 2, load_handler2)    \
    V(_, LOAD_HANDLER_TYPE, LoadHandler, 3, load_handler3)    \
    V(_, STORE_HANDLER_TYPE, StoreHandler, 0, store_handler0) \
    V(_, STORE_HANDLER_TYPE, StoreHandler, 1, store_handler1) \
    V(_, STORE_HANDLER_TYPE, StoreHandler, 2, store_handler2) \
    V(_, STORE_HANDLER_TYPE, StoreHandler, 3, store_handler3)
  
  // Adapts one DATA_HANDLER_LIST entry to the DATA_HANDLER_MAPS_LIST entry.
  #define DATA_HANDLER_MAPS_LIST_ADAPTER(V, TYPE, Name, Size, name_size) \
    V(Map, name_size##_map, Name##Size##Map)
  
  // Produces (Map, handler_name_map, HandlerNameMap) entries
  #define DATA_HANDLER_MAPS_LIST(V) \
    DATA_HANDLER_LIST(DATA_HANDLER_MAPS_LIST_ADAPTER, V)
  
  }  // namespace internal
  }  // namespace v8
  
  #endif  // V8_OBJECTS_OBJECTS_DEFINITIONS_H_
  