dart::SlowObjectCopy Class Reference

Inheritance diagram for dart::SlowObjectCopy:

Public Member Functions
	SlowObjectCopy (Thread *thread, IdentityMap *map)
	~SlowObjectCopy ()
ObjectPtr	ContinueCopyGraphSlow (const Object &root, const Object &fast_root_copy)
ArrayPtr	BuildArrayOfObjectsToRehash (const GrowableArray< const Object * > &objects_to_rehash)
Public Member Functions inherited from dart::ObjectCopy< SlowObjectCopyBase >
	ObjectCopy (Thread *thread, IdentityMap *map)
void	CopyPredefinedInstance (typename Types::Object from, typename Types::Object to, intptr_t cid)
void	CopyUserdefinedInstance (typename Types::Object from, typename Types::Object to, UnboxedFieldBitmap bitmap)
void	CopyUserdefinedInstanceWithoutUnboxedFields (typename Types::Object from, typename Types::Object to)
void	CopyClosure (typename Types::Closure from, typename Types::Closure to)
void	CopyContext (typename Types::Context from, typename Types::Context to)
void	CopyArray (typename Types::Array from, typename Types::Array to)
void	CopyGrowableObjectArray (typename Types::GrowableObjectArray from, typename Types::GrowableObjectArray to)
void	CopyRecord (typename Types::Record from, typename Types::Record to)
void	CopyLinkedHashBase (T from, T to, UntaggedLinkedHashBase *from_untagged, UntaggedLinkedHashBase *to_untagged)
void	CopyMap (typename Types::Map from, typename Types::Map to)
void	CopySet (typename Types::Set from, typename Types::Set to)
void	CopyDouble (typename Types::Double from, typename Types::Double to)
void	CopyFloat32x4 (typename Types::Float32x4 from, typename Types::Float32x4 to)
void	CopyFloat64x2 (typename Types::Float64x2 from, typename Types::Float64x2 to)
void	CopyTypedData (TypedDataPtr from, TypedDataPtr to)
void	CopyTypedData (const TypedData &from, const TypedData &to)
void	CopyTypedDataView (typename Types::TypedDataView from, typename Types::TypedDataView to)
void	CopyExternalTypedData (typename Types::ExternalTypedData from, typename Types::ExternalTypedData to)
void	CopyTransferableTypedData (typename Types::TransferableTypedData from, typename Types::TransferableTypedData to)
void	CopyWeakProperty (typename Types::WeakProperty from, typename Types::WeakProperty to)
void	CopyWeakReference (typename Types::WeakReference from, typename Types::WeakReference to)
UntaggedObject *	UntagObject (typename Types::Object obj)
Public Member Functions inherited from dart::SlowObjectCopyBase
	SlowObjectCopyBase (Thread *thread, IdentityMap *map)
Public Member Functions inherited from dart::ObjectCopyBase
	ObjectCopyBase (Thread *thread)
	~ObjectCopyBase ()

Friends
class	ObjectGraphCopier

Additional Inherited Members
Public Types inherited from dart::ObjectCopy< SlowObjectCopyBase >
using	Types = typename Base::Types
Public Types inherited from dart::SlowObjectCopyBase
using	Types = HandleTypes
Protected Member Functions inherited from dart::SlowObjectCopyBase
DART_FORCE_INLINE void	ForwardCompressedPointers (const Object &src, const Object &dst, intptr_t offset, intptr_t end_offset)
DART_FORCE_INLINE void	ForwardCompressedPointers (const Object &src, const Object &dst, intptr_t offset, intptr_t end_offset, UnboxedFieldBitmap bitmap)
void	ForwardCompressedArrayPointers (intptr_t array_length, const Object &src, const Object &dst, intptr_t offset, intptr_t end_offset)
void	ForwardCompressedContextPointers (intptr_t context_length, const Object &src, const Object &dst, intptr_t offset, intptr_t end_offset)
DART_FORCE_INLINE void	ForwardCompressedLargeArrayPointer (const Object &src, const Object &dst, intptr_t offset)
DART_FORCE_INLINE void	ForwardCompressedPointer (const Object &src, const Object &dst, intptr_t offset)
ObjectPtr	Forward (uword tags, const Object &from)
void	EnqueueTransferable (const TransferableTypedData &from, const TransferableTypedData &to)
void	EnqueueWeakProperty (const WeakProperty &from)
void	EnqueueWeakReference (const WeakReference &from)
void	EnqueueObjectToRehash (const Object &to)
void	EnqueueExpandoToRehash (const Object &to)
void	StoreCompressedArrayPointers (intptr_t array_length, const Object &src, const Object &dst, intptr_t offset, intptr_t end_offset)
void	StoreCompressedPointers (const Object &src, const Object &dst, intptr_t offset, intptr_t end_offset)
Protected Member Functions inherited from dart::ObjectCopyBase
void	StoreCompressedLargeArrayPointerBarrier (ObjectPtr obj, intptr_t offset, ObjectPtr value)
DART_FORCE_INLINE bool	CanCopyObject (uword tags, ObjectPtr object)
Static Protected Member Functions inherited from dart::SlowObjectCopyBase
static void	StoreCompressedPointersNoBarrier (const Object &src, const Object &dst, intptr_t offset, intptr_t end_offset)
Static Protected Member Functions inherited from dart::ObjectCopyBase
static ObjectPtr	LoadPointer (ObjectPtr src, intptr_t offset)
static CompressedObjectPtr	LoadCompressedPointer (ObjectPtr src, intptr_t offset)
static compressed_uword	LoadCompressedNonPointerWord (ObjectPtr src, intptr_t offset)
static void	StorePointerBarrier (ObjectPtr obj, intptr_t offset, ObjectPtr value)
static void	StoreCompressedPointerBarrier (ObjectPtr obj, intptr_t offset, ObjectPtr value)
static void	StorePointerNoBarrier (ObjectPtr obj, intptr_t offset, ObjectPtr value)
template<typename T = ObjectPtr>
static void	StoreCompressedPointerNoBarrier (ObjectPtr obj, intptr_t offset, T value)
static void	StoreCompressedNonPointerWord (ObjectPtr obj, intptr_t offset, compressed_uword value)
Protected Attributes inherited from dart::SlowObjectCopyBase
SlowForwardMap	slow_forward_map_
Protected Attributes inherited from dart::ObjectCopyBase
Thread *	thread_
uword	heap_base_
Zone *	zone_
Heap *	heap_
ClassTable *	class_table_
Scavenger *	new_space_
Object &	tmp_
Object &	to_
intptr_t	expando_cid_
const char *	exception_msg_ = nullptr
Object &	exception_unexpected_object_

Detailed Description

Definition at line 2291 of file object_graph_copy.cc.

Constructor & Destructor Documentation

SlowObjectCopy()

dart::SlowObjectCopy::SlowObjectCopy ( Thread *  thread, IdentityMap *  map  )

inline

Definition at line 2293 of file object_graph_copy.cc.

      : ObjectCopy(thread, map),
        objects_to_rehash_(Array::Handle(thread->zone())),
        expandos_to_rehash_(Array::Handle(thread->zone())) {}

~SlowObjectCopy()

dart::SlowObjectCopy::~SlowObjectCopy ( )

inline

Definition at line 2297 of file object_graph_copy.cc.

{}

Member Function Documentation

BuildArrayOfObjectsToRehash()

ArrayPtr dart::SlowObjectCopy::BuildArrayOfObjectsToRehash ( const GrowableArray< const Object * > &  objects_to_rehash )

inline

Definition at line 2386 of file object_graph_copy.cc.

                                                             {
    const intptr_t length = objects_to_rehash.length();
    if (length == 0) return Array::null();
 
    const auto& array = Array::Handle(zone_, Array::New(length));
    for (intptr_t i = 0; i < length; ++i) {
      array.SetAt(i, *objects_to_rehash[i]);
    }
    return array.ptr();
  }

ContinueCopyGraphSlow()

ObjectPtr dart::SlowObjectCopy::ContinueCopyGraphSlow ( const Object &  root, const Object &  fast_root_copy  )

inline

Definition at line 2299 of file object_graph_copy.cc.

                                                                {
    auto& root_copy = Object::Handle(Z, fast_root_copy.ptr());
    if (root_copy.ptr() == Marker()) {
      root_copy = Forward(TagsFromUntaggedObject(root.ptr().untag()), root);
    }
 
    WeakProperty& weak_property = WeakProperty::Handle(Z);
    Object& from = Object::Handle(Z);
    Object& to = Object::Handle(Z);
    while (true) {
      if (slow_forward_map_.fill_cursor_ ==
          slow_forward_map_.from_to_.Length()) {
        break;
      }
 
      // Run fixpoint to copy all objects.
      while (slow_forward_map_.fill_cursor_ <
             slow_forward_map_.from_to_.Length()) {
        const intptr_t index = slow_forward_map_.fill_cursor_;
        from = slow_forward_map_.from_to_.At(index);
        to = slow_forward_map_.from_to_.At(index + 1);
        CopyObject(from, to);
        slow_forward_map_.fill_cursor_ += 2;
        if (exception_msg_ != nullptr) {
          return Marker();
        }
        // To maintain responsiveness we regularly check whether safepoints are
        // requested.
        thread_->CheckForSafepoint();
      }
 
      // Possibly forward values of [WeakProperty]s if keys became reachable.
      intptr_t i = 0;
      auto& weak_properties = slow_forward_map_.weak_properties_;
      while (i < weak_properties.length()) {
        const auto& from_weak_property = *weak_properties[i];
        to = slow_forward_map_.ForwardedObject(from_weak_property.key());
        if (to.ptr() != Marker()) {
          weak_property ^=
              slow_forward_map_.ForwardedObject(from_weak_property.ptr());
 
          // The key became reachable so we'll change the forwarded
          // [WeakProperty]'s key to the new key (it is `null` at this point).
          weak_property.set_key(to);
 
          // Since the key has become strongly reachable in the copied graph,
          // we'll also need to forward the value.
          ForwardCompressedPointer(from_weak_property, weak_property,
                                   OFFSET_OF(UntaggedWeakProperty, value_));
 
          // We don't need to process this [WeakProperty] again.
          const intptr_t last = weak_properties.length() - 1;
          if (i < last) {
            weak_properties[i] = weak_properties[last];
            weak_properties.SetLength(last);
            continue;
          }
        }
        i++;
      }
    }
 
    // After the fix point with [WeakProperty]s do [WeakReference]s.
    WeakReference& weak_reference = WeakReference::Handle(Z);
    auto& weak_references = slow_forward_map_.weak_references_;
    for (intptr_t i = 0; i < weak_references.length(); i++) {
      const auto& from_weak_reference = *weak_references[i];
      to = slow_forward_map_.ForwardedObject(from_weak_reference.target());
      if (to.ptr() != Marker()) {
        weak_reference ^=
            slow_forward_map_.ForwardedObject(from_weak_reference.ptr());
 
        // The target became reachable so we'll change the forwarded
        // [WeakReference]'s target to the new target (it is `null` at this
        // point).
        weak_reference.set_target(to);
      }
    }
 
    objects_to_rehash_ =
        BuildArrayOfObjectsToRehash(slow_forward_map_.objects_to_rehash_);
    expandos_to_rehash_ =
        BuildArrayOfObjectsToRehash(slow_forward_map_.expandos_to_rehash_);
    return root_copy.ptr();
  }

Friends And Related Symbol Documentation

ObjectGraphCopier

friend class ObjectGraphCopier

friend

Definition at line 2399 of file object_graph_copy.cc.

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The documentation for this class was generated from the following file:

• third_party/dart-lang/sdk/runtime/vm/object_graph_copy.cc