dart::ForwardingCorpse Class Reference

#include <become.h>

Classes
class	FakeInstance

Public Member Functions
ObjectPtr	target () const
void	set_target (ObjectPtr target)
intptr_t	HeapSize ()
intptr_t	HeapSize (uword tags)

Static Public Member Functions
static ForwardingCorpse *	AsForwarder (uword addr, intptr_t size)
static void	Init ()

Detailed Description

Definition at line 25 of file become.h.

Member Function Documentation

AsForwarder()

ForwardingCorpse * dart::ForwardingCorpse::AsForwarder ( uword  addr, intptr_t  size  )

static

Definition at line 20 of file become.cc.

                                                                         {
  ASSERT(size >= kObjectAlignment);
  ASSERT(Utils::IsAligned(size, kObjectAlignment));
 
  ForwardingCorpse* result = reinterpret_cast<ForwardingCorpse*>(addr);
 
  uword tags = result->tags_;  // Carry-over any identity hash.
  tags = UntaggedObject::SizeTag::update(size, tags);
  tags = UntaggedObject::ClassIdTag::update(kForwardingCorpse, tags);
  bool is_old = (addr & kNewObjectAlignmentOffset) == kOldObjectAlignmentOffset;
  tags = UntaggedObject::NotMarkedBit::update(true, tags);
  tags = UntaggedObject::OldAndNotRememberedBit::update(is_old, tags);
  tags = UntaggedObject::NewBit::update(!is_old, tags);
 
  result->tags_ = tags;
  if (size > UntaggedObject::SizeTag::kMaxSizeTag) {
    *result->SizeAddress() = size;
  }
  result->set_target(Object::null());
  return result;
}

HeapSize() [1/2]

intptr_t dart::ForwardingCorpse::HeapSize ( )

inline

Definition at line 30 of file become.h.

{ return HeapSize(tags_); }

HeapSize() [2/2]

intptr_t dart::ForwardingCorpse::HeapSize ( uword  tags )

inline

Definition at line 31 of file become.h.

                                {
    intptr_t size = UntaggedObject::SizeTag::decode(tags);
    if (size != 0) return size;
    return *SizeAddress();
  }

Init()

void dart::ForwardingCorpse::Init ( )

static

Definition at line 42 of file become.cc.

                            {
  ASSERT(sizeof(ForwardingCorpse) == kObjectAlignment);
  ASSERT(OFFSET_OF(ForwardingCorpse, tags_) == Object::tags_offset());
}

set_target()

void dart::ForwardingCorpse::set_target ( ObjectPtr  target )

inline

Definition at line 28 of file become.h.

{ target_ = target; }

target()

ObjectPtr dart::ForwardingCorpse::target ( ) const

inline

Definition at line 27 of file become.h.

{ return target_; }

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

• third_party/dart-lang/sdk/runtime/vm/heap/become.h
• third_party/dart-lang/sdk/runtime/vm/heap/become.cc