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dart-sdk/runtime/vm/object_store.h
Vyacheslav Egorov a52f2b9617 [vm] Rework awaiter stack unwinding. 
The main contribution of this CL is unification of disparate
handling of various functions like `Future.timeout`,
`Future.wait`, `_SuspendState.createAsyncCallbacks` and
`_SuspendState._createAsyncStarCallback` into a single
`@pragma('vm:awaiter-link')` which allows Dart developers
to specify where awaiter unwinder should look for the next
awaiter.

For example this allows unwinding to succeed for the code like this:

    Future<int> outer(Future<int> inner) {
      @pragma('vm:awaiter-link')
      final completer = Completer<int>();

      inner.then((v) => completer.complete(v));

      return completer.future;
   }

This refactoring also ensures that we preserve information
(including Function & Code objects) required for awaiter
unwinding across all modes (JIT, AOT and AOT with DWARF stack
traces). This guarantees users will get the same information
no matter which mode they are running in. Previously
we have been disabling awaiter_stacks tests in some AOT
modes - which led to regressions in the quality of produced
stacks.

This CL also cleans up relationship between debugger and awaiter
stack returned by StackTrace.current - which makes stack trace
displayed by debugger (used for stepping out and determinining
whether exception is caught or not) and `StackTrace.current`
consistent.

Finally we make one user visible change to the stack trace:
awaiter stack will no always include intermediate listeners
created through `Future.then`. Previously we would sometimes
include these listeners at the tail of the stack trace,
which was inconsistent.

Ultimately this means that code like this:

    Future<int> inner() async {
      await null;  // asynchronous gap
      print(StackTrace.current); // (*)
      return 0;
    }

    Future<int> outer() async {
      int process(int v) {
        return v + 1;
      }

      return await inner().then(process);
    }

    void main() async {
      await outer();
    }

Produces stack trace like this:

    inner
    <asynchronous suspension>
    outer.process
    <asynchronous suspension>
    outer
    <asynchronous suspension>
    main
    <asynchronous suspension>

And when stepping out of `inner` execution will stop at `outer.process`
first and the next step out will bring execution to `outer` next.

Fixes https://github.com/dart-lang/sdk/issues/52797
Fixes https://github.com/dart-lang/sdk/issues/52203
Issue https://github.com/dart-lang/sdk/issues/47985

TEST=ci

Bug: b/279929839
CoreLibraryReviewExempt: CL just adds @pragma to facilitate unwinding
Cq-Include-Trybots: luci.dart.try:vm-aot-linux-product-x64-try,vm-aot-linux-debug-x64-try,vm-aot-linux-release-x64-try,vm-aot-obfuscate-linux-release-x64-try,vm-aot-dwarf-linux-product-x64-try
Change-Id: If377d5329d6a11c86effb9369dc603a7ae616fe7
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/311680
Reviewed-by: Alexander Markov <alexmarkov@google.com>
Commit-Queue: Slava Egorov <vegorov@google.com>
2023-06-30 14:03:03 +00:00

632 lines
39 KiB
C++
Raw Blame History

// 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_FFI) \
LAZY_CORE(Class, list_class) \
LAZY_CORE(Class, map_class) \
LAZY_CORE(Class, set_class) \
LAZY_CORE(Type, non_nullable_list_rare_type) \
LAZY_CORE(Type, non_nullable_map_rare_type) \
LAZY_CORE(Field, enum_index_field) \
LAZY_CORE(Field, enum_name_field) \
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_FFI(Class, varargs_class) \
LAZY_FFI(Function, handle_finalizer_message_function) \
LAZY_FFI(Function, handle_native_finalizer_message_function) \
LAZY_ASYNC(Type, non_nullable_future_never_type) \
LAZY_ASYNC(Type, nullable_future_null_type) \
LAZY_ISOLATE(Class, send_port_class) \
LAZY_ISOLATE(Class, capability_class) \
LAZY_ISOLATE(Class, transferable_class) \
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(Class, record_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_never) \
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, future_or_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, map_impl_class) \
RW(Class, const_map_impl_class) \
RW(Class, set_impl_class) \
RW(Class, const_set_impl_class) \
RW(Class, float32x4_class) \
RW(Class, int32x4_class) \
RW(Class, float64x2_class) \
RW(Class, error_class) \
RW(Class, expando_class) \
RW(Class, iterable_class) \
RW(Class, weak_property_class) \
RW(Class, weak_reference_class) \
RW(Class, finalizer_class) \
RW(Class, finalizer_entry_class) \
RW(Class, native_finalizer_class) \
ARW_AR(WeakArray, symbol_table) \
ARW_AR(WeakArray, regexp_table) \
RW(Array, canonical_types) \
RW(Array, canonical_function_types) \
RW(Array, canonical_record_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(Library, native_assets_library) \
RW(Array, native_assets_map) \
RW(GrowableObjectArray, libraries) \
RW(Array, libraries_map) \
RW(Array, uri_to_resolved_uri_map) \
RW(Array, resolved_uri_to_uri_map) \
RW(Smi, last_libraries_count) \
RW(Array, loading_units) \
RW(GrowableObjectArray, closure_functions) \
RW(Array, closure_functions_table) \
RW(GrowableObjectArray, pending_classes) \
RW(Array, record_field_names_map) \
ARW_RELAXED(Array, record_field_names) \
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_stream_controller_add) \
RW(Function, async_star_stream_controller_add_stream) \
RW(Function, suspend_state_init_async) \
RW(Function, suspend_state_await) \
RW(Function, suspend_state_await_with_type_check) \
RW(Function, suspend_state_return_async) \
RW(Function, suspend_state_return_async_not_future) \
RW(Function, suspend_state_init_async_star) \
RW(Function, suspend_state_yield_async_star) \
RW(Function, suspend_state_return_async_star) \
RW(Function, suspend_state_init_sync_star) \
RW(Function, suspend_state_suspend_sync_star_at_start) \
RW(Function, suspend_state_handle_exception) \
RW(Class, async_star_stream_controller) \
RW(Class, stream_class) \
RW(Class, sync_star_iterator_class) \
RW(Field, async_star_stream_controller_async_star_body) \
RW(Field, sync_star_iterator_current) \
RW(Field, sync_star_iterator_state) \
RW(Field, sync_star_iterator_yield_star_iterable) \
RW(CompressedStackMaps, canonicalized_stack_map_entries) \
RW(ObjectPool, global_object_pool) \
RW(Array, unique_dynamic_targets) \
RW(GrowableObjectArray, megamorphic_cache_table) \
RW(GrowableObjectArray, ffi_callback_code) \
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, write_error_stub_with_fpu_regs_stub) \
RW(Code, write_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_growable_array_stub) \
RW(Code, allocate_object_stub) \
RW(Code, allocate_object_parametrized_stub) \
RW(Code, allocate_record_stub) \
RW(Code, allocate_record2_stub) \
RW(Code, allocate_record2_named_stub) \
RW(Code, allocate_record3_stub) \
RW(Code, allocate_record3_named_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_late_static_field_stub) \
RW(Code, init_late_final_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(Array, ffi_callback_functions) \
RW(Code, slow_tts_stub) \
/* Roots for JIT/AOT snapshots are up until here (see to_snapshot() below)*/ \
RW(Code, await_stub) \
RW(Code, await_with_type_check_stub) \
RW(Code, clone_suspend_state_stub) \
RW(Code, ffi_async_callback_send_stub) \
RW(Code, init_async_stub) \
RW(Code, resume_stub) \
RW(Code, return_async_stub) \
RW(Code, return_async_not_future_stub) \
RW(Code, init_async_star_stub) \
RW(Code, yield_async_star_stub) \
RW(Code, return_async_star_stub) \
RW(Code, init_sync_star_stub) \
RW(Code, suspend_sync_star_at_start_stub) \
RW(Code, suspend_sync_star_at_yield_stub) \
RW(Array, dispatch_table_code_entries) \
RW(GrowableObjectArray, instructions_tables) \
RW(Array, obfuscation_map) \
RW(Array, loading_unit_uris) \
RW(Class, ffi_pointer_class) \
RW(Class, ffi_native_type_class) \
// 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(write_error_stub_with_fpu_regs_stub, WriteErrorSharedWithFPURegs) \
DO(write_error_stub_without_fpu_regs_stub, WriteErrorSharedWithoutFPURegs) \
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_growable_array_stub, AllocateGrowableArray) \
DO(allocate_object_stub, AllocateObject) \
DO(allocate_object_parametrized_stub, AllocateObjectParameterized) \
DO(allocate_record_stub, AllocateRecord) \
DO(allocate_record2_stub, AllocateRecord2) \
DO(allocate_record2_named_stub, AllocateRecord2Named) \
DO(allocate_record3_stub, AllocateRecord3) \
DO(allocate_record3_named_stub, AllocateRecord3Named) \
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_late_static_field_stub, InitLateStaticField) \
DO(init_late_final_static_field_stub, InitLateFinalStaticField) \
DO(init_instance_field_stub, InitInstanceField) \
DO(init_late_instance_field_stub, InitLateInstanceField) \
DO(init_late_final_instance_field_stub, InitLateFinalInstanceField) \
DO(await_stub, Await) \
DO(await_with_type_check_stub, AwaitWithTypeCheck) \
DO(clone_suspend_state_stub, CloneSuspendState) \
DO(ffi_async_callback_send_stub, FfiAsyncCallbackSend) \
DO(init_async_stub, InitAsync) \
DO(resume_stub, Resume) \
DO(return_async_stub, ReturnAsync) \
DO(return_async_not_future_stub, ReturnAsyncNotFuture) \
DO(init_async_star_stub, InitAsyncStar) \
DO(yield_async_star_stub, YieldAsyncStar) \
DO(return_async_star_stub, ReturnAsyncStar) \
DO(init_sync_star_stub, InitSyncStar) \
DO(suspend_sync_star_at_start_stub, SuspendSyncStarAtStart) \
DO(suspend_sync_star_at_yield_stub, SuspendSyncStarAtYield) \
DO(instance_of_stub, InstanceOf)
#define ISOLATE_OBJECT_STORE_FIELD_LIST(R_, RW) \
RW(UnhandledException, preallocated_unhandled_exception) \
RW(StackTrace, preallocated_stack_trace) \
RW(UnwindError, preallocated_unwind_error) \
R_(Array, dart_args_1) \
R_(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)
#define DECLARE_LAZY_INIT_FFI_GETTER(Type, name) \
DECLARE_LAZY_INIT_GETTER(Type, name, LazyInitFfiMembers)
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,
DECLARE_LAZY_INIT_FFI_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 LazyInitFfiMembers();
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,
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_native_type_class_);
}
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 nullptr;
}
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_
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