dart-sdk/runtime/vm/object_store.h
Ryan Macnak f9b7ed74dc [vm] Remove dead library references from the object store.
- dart:_builtin is only available in the standalone embedder, and should have never been referenced by the VM proper.
 - dart:profiler was long ago renamed to dart:developer.

TEST=build
Change-Id: I0743f52efc3331a8500494b2d87f621190566b62
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/212680
Commit-Queue: Ryan Macnak <rmacnak@google.com>
Reviewed-by: Ben Konyi <bkonyi@google.com>
Reviewed-by: Siva Annamalai <asiva@google.com>
2021-09-08 16:29:19 +00:00

534 lines
32 KiB
C++

// Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
#ifndef RUNTIME_VM_OBJECT_STORE_H_
#define RUNTIME_VM_OBJECT_STORE_H_
#include "vm/object.h"
namespace dart {
// Forward declarations.
class Isolate;
class ObjectPointerVisitor;
// A list of the bootstrap libraries including CamelName and name.
//
// These are listed in the order that they are compiled (see vm/bootstrap.cc).
#define FOR_EACH_BOOTSTRAP_LIBRARY(M) \
M(Core, core) \
M(Async, async) \
M(Collection, collection) \
M(Convert, convert) \
M(Developer, developer) \
M(Ffi, ffi) \
M(Internal, _internal) \
M(Isolate, isolate) \
M(Math, math) \
M(Mirrors, mirrors) \
M(TypedData, typed_data) \
M(VMService, _vmservice)
// TODO(liama): Once NNBD is enabled, *_type will be deleted and all uses will
// be replaced with *_type_non_nullable. Later, once we drop support for opted
// out code, *_type_legacy will be deleted.
//
// R_ - needs getter only
// RW - needs getter and setter
// ARW_RELAXED - needs getter and setter with relaxed atomic access
// ARW_AR - needs getter and setter with acq/rel atomic access
// LAZY_CORE - needs lazy init getter for a "dart:core" member
// LAZY_ASYNC - needs lazy init getter for a "dart:async" member
// LAZY_ISOLATE - needs lazy init getter for a "dart:isolate" member
// LAZY_INTERNAL - needs lazy init getter for a "dart:_internal" member
#define OBJECT_STORE_FIELD_LIST(R_, RW, ARW_RELAXED, ARW_AR, LAZY_CORE, \
LAZY_ASYNC, LAZY_ISOLATE, LAZY_INTERNAL) \
LAZY_CORE(Class, list_class) \
LAZY_CORE(Type, non_nullable_list_rare_type) \
LAZY_CORE(Type, non_nullable_map_rare_type) \
LAZY_CORE(Function, _object_equals_function) \
LAZY_CORE(Function, _object_hash_code_function) \
LAZY_CORE(Function, _object_to_string_function) \
LAZY_INTERNAL(Class, symbol_class) \
LAZY_INTERNAL(Field, symbol_name_field) \
LAZY_ASYNC(Type, non_nullable_future_rare_type) \
LAZY_ASYNC(Type, non_nullable_future_never_type) \
LAZY_ASYNC(Type, nullable_future_null_type) \
LAZY_ISOLATE(Function, lookup_port_handler) \
LAZY_ISOLATE(Function, lookup_open_ports) \
LAZY_ISOLATE(Function, handle_message_function) \
RW(Class, object_class) \
RW(Type, object_type) \
RW(Type, legacy_object_type) \
RW(Type, non_nullable_object_type) \
RW(Type, nullable_object_type) \
RW(Class, null_class) \
RW(Type, null_type) \
RW(Class, never_class) \
RW(Type, never_type) \
RW(Type, function_type) \
RW(Type, type_type) \
RW(Class, closure_class) \
RW(Type, number_type) \
RW(Type, int_type) \
RW(Type, legacy_int_type) \
RW(Type, non_nullable_int_type) \
RW(Type, nullable_int_type) \
RW(Class, integer_implementation_class) \
RW(Type, int64_type) \
RW(Class, smi_class) \
RW(Type, smi_type) \
RW(Class, mint_class) \
RW(Type, mint_type) \
RW(Class, double_class) \
RW(Type, double_type) \
RW(Type, nullable_double_type) \
RW(Type, float32x4_type) \
RW(Type, int32x4_type) \
RW(Type, float64x2_type) \
RW(Type, string_type) \
RW(Type, legacy_string_type) \
RW(TypeArguments, type_argument_int) \
RW(TypeArguments, type_argument_legacy_int) \
RW(TypeArguments, type_argument_double) \
RW(TypeArguments, type_argument_string) \
RW(TypeArguments, type_argument_legacy_string) \
RW(TypeArguments, type_argument_string_dynamic) \
RW(TypeArguments, type_argument_string_string) \
RW(Class, compiletime_error_class) \
RW(Class, pragma_class) \
RW(Field, pragma_name) \
RW(Field, pragma_options) \
RW(Class, future_class) \
RW(Class, completer_class) \
RW(Class, one_byte_string_class) \
RW(Class, two_byte_string_class) \
RW(Class, external_one_byte_string_class) \
RW(Class, external_two_byte_string_class) \
RW(Type, bool_type) \
RW(Class, bool_class) \
RW(Class, array_class) \
RW(Type, array_type) \
RW(Class, immutable_array_class) \
RW(Class, growable_object_array_class) \
RW(Class, linked_hash_map_class) \
RW(Class, immutable_linked_hash_map_class) \
RW(Class, linked_hash_set_class) \
RW(Class, immutable_linked_hash_set_class) \
RW(Class, float32x4_class) \
RW(Class, int32x4_class) \
RW(Class, float64x2_class) \
RW(Class, error_class) \
RW(Class, expando_class) \
RW(Class, weak_property_class) \
ARW_AR(Array, symbol_table) \
RW(Array, canonical_types) \
RW(Array, canonical_function_types) \
RW(Array, canonical_type_parameters) \
RW(Array, canonical_type_arguments) \
RW(Library, async_library) \
RW(Library, core_library) \
RW(Library, collection_library) \
RW(Library, convert_library) \
RW(Library, developer_library) \
RW(Library, ffi_library) \
RW(Library, _internal_library) \
RW(Library, isolate_library) \
RW(Library, math_library) \
RW(Library, mirrors_library) \
RW(Library, native_wrappers_library) \
RW(Library, root_library) \
RW(Library, typed_data_library) \
RW(Library, _vmservice_library) \
RW(GrowableObjectArray, libraries) \
RW(Array, libraries_map) \
RW(Array, loading_units) \
RW(GrowableObjectArray, closure_functions) \
RW(GrowableObjectArray, pending_classes) \
RW(Instance, stack_overflow) \
RW(Instance, out_of_memory) \
RW(Function, growable_list_factory) \
RW(Function, simple_instance_of_function) \
RW(Function, simple_instance_of_true_function) \
RW(Function, simple_instance_of_false_function) \
RW(Function, async_star_move_next_helper) \
RW(Function, complete_on_async_return) \
RW(Function, complete_on_async_error) \
RW(Class, async_star_stream_controller) \
ARW_RELAXED(Smi, future_timeout_future_index) \
ARW_RELAXED(Smi, future_wait_future_index) \
RW(CompressedStackMaps, canonicalized_stack_map_entries) \
RW(ObjectPool, global_object_pool) \
RW(Array, unique_dynamic_targets) \
RW(GrowableObjectArray, megamorphic_cache_table) \
RW(Code, build_generic_method_extractor_code) \
RW(Code, build_nongeneric_method_extractor_code) \
RW(Code, dispatch_table_null_error_stub) \
RW(Code, late_initialization_error_stub_with_fpu_regs_stub) \
RW(Code, late_initialization_error_stub_without_fpu_regs_stub) \
RW(Code, null_error_stub_with_fpu_regs_stub) \
RW(Code, null_error_stub_without_fpu_regs_stub) \
RW(Code, null_arg_error_stub_with_fpu_regs_stub) \
RW(Code, null_arg_error_stub_without_fpu_regs_stub) \
RW(Code, null_cast_error_stub_with_fpu_regs_stub) \
RW(Code, null_cast_error_stub_without_fpu_regs_stub) \
RW(Code, range_error_stub_with_fpu_regs_stub) \
RW(Code, range_error_stub_without_fpu_regs_stub) \
RW(Code, allocate_mint_with_fpu_regs_stub) \
RW(Code, allocate_mint_without_fpu_regs_stub) \
RW(Code, stack_overflow_stub_with_fpu_regs_stub) \
RW(Code, stack_overflow_stub_without_fpu_regs_stub) \
RW(Code, allocate_array_stub) \
RW(Code, allocate_mint_stub) \
RW(Code, allocate_double_stub) \
RW(Code, allocate_float32x4_stub) \
RW(Code, allocate_float64x2_stub) \
RW(Code, allocate_int32x4_stub) \
RW(Code, allocate_int8_array_stub) \
RW(Code, allocate_uint8_array_stub) \
RW(Code, allocate_uint8_clamped_array_stub) \
RW(Code, allocate_int16_array_stub) \
RW(Code, allocate_uint16_array_stub) \
RW(Code, allocate_int32_array_stub) \
RW(Code, allocate_uint32_array_stub) \
RW(Code, allocate_int64_array_stub) \
RW(Code, allocate_uint64_array_stub) \
RW(Code, allocate_float32_array_stub) \
RW(Code, allocate_float64_array_stub) \
RW(Code, allocate_float32x4_array_stub) \
RW(Code, allocate_int32x4_array_stub) \
RW(Code, allocate_float64x2_array_stub) \
RW(Code, allocate_closure_stub) \
RW(Code, allocate_context_stub) \
RW(Code, allocate_object_stub) \
RW(Code, allocate_object_parametrized_stub) \
RW(Code, allocate_unhandled_exception_stub) \
RW(Code, clone_context_stub) \
RW(Code, write_barrier_wrappers_stub) \
RW(Code, array_write_barrier_stub) \
RW(Code, throw_stub) \
RW(Code, re_throw_stub) \
RW(Code, assert_boolean_stub) \
RW(Code, instance_of_stub) \
RW(Code, init_static_field_stub) \
RW(Code, init_instance_field_stub) \
RW(Code, init_late_instance_field_stub) \
RW(Code, init_late_final_instance_field_stub) \
RW(Code, call_closure_no_such_method_stub) \
RW(Code, default_tts_stub) \
RW(Code, default_nullable_tts_stub) \
RW(Code, top_type_tts_stub) \
RW(Code, nullable_type_parameter_tts_stub) \
RW(Code, type_parameter_tts_stub) \
RW(Code, unreachable_tts_stub) \
RW(Code, slow_tts_stub) \
RW(Array, dispatch_table_code_entries) \
RW(GrowableObjectArray, instructions_tables) \
RW(Array, obfuscation_map) \
RW(GrowableObjectArray, ffi_callback_functions) \
RW(Class, ffi_pointer_class) \
RW(Class, ffi_native_type_class) \
RW(Object, ffi_as_function_internal) \
// Please remember the last entry must be referred in the 'to' function below.
#define OBJECT_STORE_STUB_CODE_LIST(DO) \
DO(dispatch_table_null_error_stub, DispatchTableNullError) \
DO(late_initialization_error_stub_with_fpu_regs_stub, \
LateInitializationErrorSharedWithFPURegs) \
DO(late_initialization_error_stub_without_fpu_regs_stub, \
LateInitializationErrorSharedWithoutFPURegs) \
DO(null_error_stub_with_fpu_regs_stub, NullErrorSharedWithFPURegs) \
DO(null_error_stub_without_fpu_regs_stub, NullErrorSharedWithoutFPURegs) \
DO(null_arg_error_stub_with_fpu_regs_stub, NullArgErrorSharedWithFPURegs) \
DO(null_arg_error_stub_without_fpu_regs_stub, \
NullArgErrorSharedWithoutFPURegs) \
DO(null_cast_error_stub_with_fpu_regs_stub, NullCastErrorSharedWithFPURegs) \
DO(null_cast_error_stub_without_fpu_regs_stub, \
NullCastErrorSharedWithoutFPURegs) \
DO(range_error_stub_with_fpu_regs_stub, RangeErrorSharedWithFPURegs) \
DO(range_error_stub_without_fpu_regs_stub, RangeErrorSharedWithoutFPURegs) \
DO(allocate_mint_with_fpu_regs_stub, AllocateMintSharedWithFPURegs) \
DO(allocate_mint_without_fpu_regs_stub, AllocateMintSharedWithoutFPURegs) \
DO(stack_overflow_stub_with_fpu_regs_stub, StackOverflowSharedWithFPURegs) \
DO(stack_overflow_stub_without_fpu_regs_stub, \
StackOverflowSharedWithoutFPURegs) \
DO(allocate_array_stub, AllocateArray) \
DO(allocate_mint_stub, AllocateMint) \
DO(allocate_double_stub, AllocateDouble) \
DO(allocate_float32x4_stub, AllocateFloat32x4) \
DO(allocate_float64x2_stub, AllocateFloat64x2) \
DO(allocate_int32x4_stub, AllocateInt32x4) \
DO(allocate_int8_array_stub, AllocateInt8Array) \
DO(allocate_uint8_array_stub, AllocateUint8Array) \
DO(allocate_uint8_clamped_array_stub, AllocateUint8ClampedArray) \
DO(allocate_int16_array_stub, AllocateInt16Array) \
DO(allocate_uint16_array_stub, AllocateUint16Array) \
DO(allocate_int32_array_stub, AllocateInt32Array) \
DO(allocate_uint32_array_stub, AllocateUint32Array) \
DO(allocate_int64_array_stub, AllocateInt64Array) \
DO(allocate_uint64_array_stub, AllocateUint64Array) \
DO(allocate_float32_array_stub, AllocateFloat32Array) \
DO(allocate_float64_array_stub, AllocateFloat64Array) \
DO(allocate_float32x4_array_stub, AllocateFloat32x4Array) \
DO(allocate_int32x4_array_stub, AllocateInt32x4Array) \
DO(allocate_float64x2_array_stub, AllocateFloat64x2Array) \
DO(allocate_closure_stub, AllocateClosure) \
DO(allocate_context_stub, AllocateContext) \
DO(allocate_object_stub, AllocateObject) \
DO(allocate_object_parametrized_stub, AllocateObjectParameterized) \
DO(allocate_unhandled_exception_stub, AllocateUnhandledException) \
DO(clone_context_stub, CloneContext) \
DO(call_closure_no_such_method_stub, CallClosureNoSuchMethod) \
DO(default_tts_stub, DefaultTypeTest) \
DO(default_nullable_tts_stub, DefaultNullableTypeTest) \
DO(top_type_tts_stub, TopTypeTypeTest) \
DO(nullable_type_parameter_tts_stub, NullableTypeParameterTypeTest) \
DO(type_parameter_tts_stub, TypeParameterTypeTest) \
DO(unreachable_tts_stub, UnreachableTypeTest) \
DO(slow_tts_stub, SlowTypeTest) \
DO(write_barrier_wrappers_stub, WriteBarrierWrappers) \
DO(array_write_barrier_stub, ArrayWriteBarrier) \
DO(throw_stub, Throw) \
DO(re_throw_stub, ReThrow) \
DO(assert_boolean_stub, AssertBoolean) \
DO(init_static_field_stub, InitStaticField) \
DO(init_instance_field_stub, InitInstanceField) \
DO(init_late_instance_field_stub, InitLateInstanceField) \
DO(init_late_final_instance_field_stub, InitLateFinalInstanceField) \
DO(instance_of_stub, InstanceOf)
#define ISOLATE_OBJECT_STORE_FIELD_LIST(R_, RW) \
RW(UnhandledException, preallocated_unhandled_exception) \
RW(StackTrace, preallocated_stack_trace) \
RW(Array, dart_args_1) \
RW(Array, dart_args_2) \
R_(GrowableObjectArray, resume_capabilities) \
R_(GrowableObjectArray, exit_listeners) \
R_(GrowableObjectArray, error_listeners)
// Please remember the last entry must be referred in the 'to' function below.
class IsolateObjectStore {
public:
IsolateObjectStore() {}
~IsolateObjectStore() {}
#define DECLARE_GETTER(Type, name) \
Type##Ptr name() const { return name##_; } \
static intptr_t name##_offset() { \
return OFFSET_OF(IsolateObjectStore, name##_); \
}
#define DECLARE_GETTER_AND_SETTER(Type, name) \
DECLARE_GETTER(Type, name) \
void set_##name(const Type& value) { name##_ = value.ptr(); }
ISOLATE_OBJECT_STORE_FIELD_LIST(DECLARE_GETTER, DECLARE_GETTER_AND_SETTER)
#undef DECLARE_GETTER
#undef DECLARE_GETTER_AND_SETTER
// Visit all object pointers.
void VisitObjectPointers(ObjectPointerVisitor* visitor);
// Called to initialize objects required by the vm but which invoke
// dart code. If an error occurs the error object is returned otherwise
// a null object is returned.
ErrorPtr PreallocateObjects(const Object& out_of_memory);
void Init();
void PostLoad();
#ifndef PRODUCT
void PrintToJSONObject(JSONObject* jsobj);
#endif
private:
// Finds a core library private method in Object.
FunctionPtr PrivateObjectLookup(const String& name);
ObjectPtr* from() {
return reinterpret_cast<ObjectPtr*>(&preallocated_unhandled_exception_);
}
#define DECLARE_OBJECT_STORE_FIELD(type, name) type##Ptr name##_;
ISOLATE_OBJECT_STORE_FIELD_LIST(DECLARE_OBJECT_STORE_FIELD,
DECLARE_OBJECT_STORE_FIELD)
#undef DECLARE_OBJECT_STORE_FIELD
ObjectPtr* to() { return reinterpret_cast<ObjectPtr*>(&error_listeners_); }
friend class Serializer;
friend class Deserializer;
DISALLOW_COPY_AND_ASSIGN(IsolateObjectStore);
};
// The object store is a per isolate group instance which stores references to
// objects used by the VM shared by all isolates in a group.
class ObjectStore {
public:
enum BootstrapLibraryId {
#define MAKE_ID(Name, _) k##Name,
FOR_EACH_BOOTSTRAP_LIBRARY(MAKE_ID)
#undef MAKE_ID
};
ObjectStore();
~ObjectStore();
#define DECLARE_OFFSET(name) \
static intptr_t name##_offset() { return OFFSET_OF(ObjectStore, name##_); }
#define DECLARE_GETTER(Type, name) \
Type##Ptr name() const { return name##_; } \
DECLARE_OFFSET(name)
#define DECLARE_GETTER_AND_SETTER(Type, name) \
DECLARE_GETTER(Type, name) \
void set_##name(const Type& value) { name##_ = value.ptr(); }
#define DECLARE_RELAXED_ATOMIC_GETTER_AND_SETTER(Type, name) \
template <std::memory_order order = std::memory_order_relaxed> \
Type##Ptr name() const { \
return name##_.load(order); \
} \
template <std::memory_order order = std::memory_order_relaxed> \
void set_##name(const Type& value) { \
name##_.store(value.ptr(), order); \
} \
DECLARE_OFFSET(name)
#define DECLARE_ACQREL_ATOMIC_GETTER_AND_SETTER(Type, name) \
Type##Ptr name() const { return name##_.load(); } \
void set_##name(const Type& value) { name##_.store(value.ptr()); } \
DECLARE_OFFSET(name)
#define DECLARE_LAZY_INIT_GETTER(Type, name, init) \
Type##Ptr name() { \
if (name##_.load() == Type::null()) { \
init(); \
} \
return name##_.load(); \
} \
DECLARE_OFFSET(name)
#define DECLARE_LAZY_INIT_CORE_GETTER(Type, name) \
DECLARE_LAZY_INIT_GETTER(Type, name, LazyInitCoreMembers)
#define DECLARE_LAZY_INIT_ASYNC_GETTER(Type, name) \
DECLARE_LAZY_INIT_GETTER(Type, name, LazyInitAsyncMembers)
#define DECLARE_LAZY_INIT_ISOLATE_GETTER(Type, name) \
DECLARE_LAZY_INIT_GETTER(Type, name, LazyInitIsolateMembers)
#define DECLARE_LAZY_INIT_INTERNAL_GETTER(Type, name) \
DECLARE_LAZY_INIT_GETTER(Type, name, LazyInitInternalMembers)
OBJECT_STORE_FIELD_LIST(DECLARE_GETTER,
DECLARE_GETTER_AND_SETTER,
DECLARE_RELAXED_ATOMIC_GETTER_AND_SETTER,
DECLARE_ACQREL_ATOMIC_GETTER_AND_SETTER,
DECLARE_LAZY_INIT_CORE_GETTER,
DECLARE_LAZY_INIT_ASYNC_GETTER,
DECLARE_LAZY_INIT_ISOLATE_GETTER,
DECLARE_LAZY_INIT_INTERNAL_GETTER)
#undef DECLARE_OFFSET
#undef DECLARE_GETTER
#undef DECLARE_GETTER_AND_SETTER
#undef DECLARE_RELAXED_ATOMIC_GETTER_AND_SETTER
#undef DECLARE_ACQREL_ATOMIC_GETTER_AND_SETTER
#undef DECLARE_LAZY_INIT_GETTER
#undef DECLARE_LAZY_INIT_CORE_GETTER
#undef DECLARE_LAZY_INIT_ASYNC_GETTER
#undef DECLARE_LAZY_INIT_ISOLATE_GETTER
#undef DECLARE_LAZY_INIT_INTERNAL_GETTER
LibraryPtr bootstrap_library(BootstrapLibraryId index) {
switch (index) {
#define MAKE_CASE(CamelName, name) \
case k##CamelName: \
return name##_library_;
FOR_EACH_BOOTSTRAP_LIBRARY(MAKE_CASE)
#undef MAKE_CASE
default:
UNREACHABLE();
return Library::null();
}
}
void set_bootstrap_library(BootstrapLibraryId index, const Library& value) {
switch (index) {
#define MAKE_CASE(CamelName, name) \
case k##CamelName: \
name##_library_ = value.ptr(); \
break;
FOR_EACH_BOOTSTRAP_LIBRARY(MAKE_CASE)
#undef MAKE_CASE
default:
UNREACHABLE();
}
}
// Visit all object pointers.
void VisitObjectPointers(ObjectPointerVisitor* visitor);
// Called to initialize objects required by the vm but which invoke
// dart code. If an error occurs the error object is returned otherwise
// a null object is returned.
ErrorPtr PreallocateObjects();
void InitKnownObjects();
void InitStubs();
#ifndef PRODUCT
void PrintToJSONObject(JSONObject* jsobj);
#endif
private:
void LazyInitCoreMembers();
void LazyInitAsyncMembers();
void LazyInitIsolateMembers();
void LazyInitInternalMembers();
// Finds a core library private method in Object.
FunctionPtr PrivateObjectLookup(const String& name);
ObjectPtr* from() { return reinterpret_cast<ObjectPtr*>(&list_class_); }
#define DECLARE_OBJECT_STORE_FIELD(type, name) type##Ptr name##_;
#define DECLARE_ATOMIC_OBJECT_STORE_FIELD(type, name) \
std::atomic<type##Ptr> name##_;
#define DECLARE_LAZY_OBJECT_STORE_FIELD(type, name) \
AcqRelAtomic<type##Ptr> name##_;
OBJECT_STORE_FIELD_LIST(DECLARE_OBJECT_STORE_FIELD,
DECLARE_OBJECT_STORE_FIELD,
DECLARE_ATOMIC_OBJECT_STORE_FIELD,
DECLARE_LAZY_OBJECT_STORE_FIELD,
DECLARE_LAZY_OBJECT_STORE_FIELD,
DECLARE_LAZY_OBJECT_STORE_FIELD,
DECLARE_LAZY_OBJECT_STORE_FIELD,
DECLARE_LAZY_OBJECT_STORE_FIELD)
#undef DECLARE_OBJECT_STORE_FIELD
#undef DECLARE_ATOMIC_OBJECT_STORE_FIELD
#undef DECLARE_LAZY_OBJECT_STORE_FIELD
ObjectPtr* to() {
return reinterpret_cast<ObjectPtr*>(&ffi_as_function_internal_);
}
ObjectPtr* to_snapshot(Snapshot::Kind kind) {
switch (kind) {
case Snapshot::kFull:
case Snapshot::kFullCore:
return reinterpret_cast<ObjectPtr*>(&global_object_pool_);
case Snapshot::kFullJIT:
case Snapshot::kFullAOT:
return reinterpret_cast<ObjectPtr*>(&slow_tts_stub_);
case Snapshot::kNone:
case Snapshot::kInvalid:
break;
}
UNREACHABLE();
return NULL;
}
uword unused_field_;
friend class ProgramSerializationRoots;
friend class ProgramDeserializationRoots;
friend class ProgramVisitor;
DISALLOW_COPY_AND_ASSIGN(ObjectStore);
};
} // namespace dart
#endif // RUNTIME_VM_OBJECT_STORE_H_