dart::InstanceSerializationCluster Class Reference

Inheritance diagram for dart::InstanceSerializationCluster:

Public Member Functions
	InstanceSerializationCluster (bool is_canonical, intptr_t cid)
	~InstanceSerializationCluster ()
void	Trace (Serializer *s, ObjectPtr object)
void	WriteAlloc (Serializer *s)
void	WriteFill (Serializer *s)
Public Member Functions inherited from dart::SerializationCluster
	SerializationCluster (const char *name, intptr_t cid, intptr_t target_instance_size=kSizeVaries, bool is_canonical=false)
virtual	~SerializationCluster ()
virtual void	Trace (Serializer *serializer, ObjectPtr object)=0
virtual void	WriteAlloc (Serializer *serializer)=0
virtual void	WriteFill (Serializer *serializer)=0
void	WriteAndMeasureAlloc (Serializer *serializer)
void	WriteAndMeasureFill (Serializer *serializer)
const char *	name () const
intptr_t	cid () const
bool	is_canonical () const
bool	is_immutable () const
intptr_t	size () const
intptr_t	num_objects () const
intptr_t	target_memory_size () const
Public Member Functions inherited from dart::ZoneAllocated
	ZoneAllocated ()
void *	operator new (size_t size)
void *	operator new (size_t size, Zone *zone)
void	operator delete (void *pointer)

Additional Inherited Members
Static Public Attributes inherited from dart::SerializationCluster
static constexpr intptr_t	kSizeVaries = -1
Protected Attributes inherited from dart::SerializationCluster
const char *const	name_
const intptr_t	cid_
const intptr_t	target_instance_size_
const bool	is_canonical_
const bool	is_immutable_
intptr_t	size_ = 0
intptr_t	num_objects_ = 0
intptr_t	target_memory_size_ = 0

Detailed Description

Definition at line 4452 of file app_snapshot.cc.

Constructor & Destructor Documentation

InstanceSerializationCluster()

dart::InstanceSerializationCluster::InstanceSerializationCluster ( bool  is_canonical, intptr_t  cid  )

inline

Definition at line 4454 of file app_snapshot.cc.

      : SerializationCluster("Instance", cid, kSizeVaries, is_canonical) {
    ClassPtr cls = IsolateGroup::Current()->class_table()->At(cid);
    host_next_field_offset_in_words_ =
        cls->untag()->host_next_field_offset_in_words_;
    ASSERT(host_next_field_offset_in_words_ > 0);
#if defined(DART_PRECOMPILER)
    target_next_field_offset_in_words_ =
        cls->untag()->target_next_field_offset_in_words_;
    target_instance_size_in_words_ =
        cls->untag()->target_instance_size_in_words_;
#else
    target_next_field_offset_in_words_ =
        cls->untag()->host_next_field_offset_in_words_;
    target_instance_size_in_words_ = cls->untag()->host_instance_size_in_words_;
#endif  // defined(DART_PRECOMPILER)
    ASSERT(target_next_field_offset_in_words_ > 0);
    ASSERT(target_instance_size_in_words_ > 0);
  }

~InstanceSerializationCluster()

dart::InstanceSerializationCluster::~InstanceSerializationCluster ( )

inline

Definition at line 4473 of file app_snapshot.cc.

{}

Member Function Documentation

Trace()

void dart::InstanceSerializationCluster::Trace ( Serializer *  s, ObjectPtr  object  )

inlinevirtual

Implements dart::SerializationCluster.

Definition at line 4475 of file app_snapshot.cc.

                                              {
    InstancePtr instance = Instance::RawCast(object);
    objects_.Add(instance);
    const intptr_t next_field_offset = host_next_field_offset_in_words_
                                       << kCompressedWordSizeLog2;
    const auto unboxed_fields_bitmap =
        s->isolate_group()->class_table()->GetUnboxedFieldsMapAt(cid_);
    intptr_t offset = Instance::NextFieldOffset();
    while (offset < next_field_offset) {
      // Skips unboxed fields
      if (!unboxed_fields_bitmap.Get(offset / kCompressedWordSize)) {
        ObjectPtr raw_obj =
            reinterpret_cast<CompressedObjectPtr*>(
                reinterpret_cast<uword>(instance->untag()) + offset)
                ->Decompress(instance->untag()->heap_base());
        s->Push(raw_obj);
      }
      offset += kCompressedWordSize;
    }
  }

WriteAlloc()

void dart::InstanceSerializationCluster::WriteAlloc ( Serializer *  s )

inlinevirtual

Implements dart::SerializationCluster.

Definition at line 4496 of file app_snapshot.cc.

                                 {
    const intptr_t count = objects_.length();
    s->WriteUnsigned(count);
 
    s->Write<int32_t>(target_next_field_offset_in_words_);
    s->Write<int32_t>(target_instance_size_in_words_);
 
    for (intptr_t i = 0; i < count; i++) {
      InstancePtr instance = objects_[i];
      s->AssignRef(instance);
    }
 
    const intptr_t instance_size = compiler::target::RoundedAllocationSize(
        target_instance_size_in_words_ * compiler::target::kCompressedWordSize);
    target_memory_size_ += instance_size * count;
  }

WriteFill()

void dart::InstanceSerializationCluster::WriteFill ( Serializer *  s )

inlinevirtual

Implements dart::SerializationCluster.

Definition at line 4513 of file app_snapshot.cc.

                                {
    intptr_t next_field_offset = host_next_field_offset_in_words_
                                 << kCompressedWordSizeLog2;
    const intptr_t count = objects_.length();
    s->WriteUnsigned64(CalculateTargetUnboxedFieldsBitmap(s, cid_).Value());
    const auto unboxed_fields_bitmap =
        s->isolate_group()->class_table()->GetUnboxedFieldsMapAt(cid_);
 
    for (intptr_t i = 0; i < count; i++) {
      InstancePtr instance = objects_[i];
      AutoTraceObject(instance);
#if defined(DART_PRECOMPILER)
      if (FLAG_write_v8_snapshot_profile_to != nullptr) {
        ClassPtr cls = s->isolate_group()->class_table()->At(cid_);
        s->AttributePropertyRef(cls, "<class>");
      }
#endif
      intptr_t offset = Instance::NextFieldOffset();
      while (offset < next_field_offset) {
        if (unboxed_fields_bitmap.Get(offset / kCompressedWordSize)) {
          // Writes 32 bits of the unboxed value at a time.
          const compressed_uword value = *reinterpret_cast<compressed_uword*>(
              reinterpret_cast<uword>(instance->untag()) + offset);
          s->WriteWordWith32BitWrites(value);
        } else {
          ObjectPtr raw_obj =
              reinterpret_cast<CompressedObjectPtr*>(
                  reinterpret_cast<uword>(instance->untag()) + offset)
                  ->Decompress(instance->untag()->heap_base());
          s->WriteElementRef(raw_obj, offset);
        }
        offset += kCompressedWordSize;
      }
    }
  }

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

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