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PagedSpace Class Reference

#include <spaces.h>

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Public Member Functions

 PagedSpace (Heap *heap, intptr_t max_capacity, AllocationSpace id, Executability executable)
 
virtual ~PagedSpace ()
 
bool SetUp ()
 
bool HasBeenSetUp ()
 
void TearDown ()
 
bool Contains (Address a)
 
bool Contains (HeapObject *o)
 
MUST_USE_RESULT MaybeObject * FindObject (Address addr)
 
virtual void PrepareForMarkCompact ()
 
intptr_t Capacity ()
 
intptr_t CommittedMemory ()
 
void ClearStats ()
 
intptr_t Available ()
 
virtual intptr_t Size ()
 
virtual intptr_t SizeOfObjects ()
 
virtual intptr_t Waste ()
 
Address top ()
 
Address limit ()
 
MUST_USE_RESULT MaybeObject * AllocateRaw (int size_in_bytes)
 
virtual bool ReserveSpace (int bytes)
 
int Free (Address start, int size_in_bytes)
 
void ResetFreeList ()
 
void SetTop (Address top, Address limit)
 
void Allocate (int bytes)
 
void IncreaseCapacity (int size)
 
void ReleasePage (Page *page)
 
void ReleaseAllUnusedPages ()
 
Page * anchor ()
 
bool was_swept_conservatively ()
 
void set_was_swept_conservatively (bool b)
 
void SetPagesToSweep (Page *first)
 
void IncrementUnsweptFreeBytes (int by)
 
void IncreaseUnsweptFreeBytes (Page *p)
 
void DecreaseUnsweptFreeBytes (Page *p)
 
bool AdvanceSweeper (intptr_t bytes_to_sweep)
 
bool IsSweepingComplete ()
 
Page * FirstPage ()
 
Page * LastPage ()
 
void CountFreeListItems (Page *p, FreeList::SizeStats *sizes)
 
void EvictEvacuationCandidatesFromFreeLists ()
 
bool CanExpand ()
 
int CountTotalPages ()
 
int AreaSize ()
 
- Public Member Functions inherited from Space
 Space (Heap *heap, AllocationSpace id, Executability executable)
 
virtual ~Space ()
 
Heap * heap () const
 
Executability executable ()
 
AllocationSpace identity ()
 
virtual int RoundSizeDownToObjectAlignment (int size)
 
- Public Member Functions inherited from Malloced
void * operator new (size_t size)
 
void operator delete (void *p)
 

Static Public Member Functions

static bool ShouldBeSweptLazily (Page *p)
 
- Static Public Member Functions inherited from Malloced
static void FatalProcessOutOfMemory ()
 
static void * New (size_t size)
 
static void Delete (void *p)
 

Protected Member Functions

intptr_t SizeOfFirstPage ()
 
bool Expand ()
 
HeapObject * AllocateLinearly (int size_in_bytes)
 
virtual MUST_USE_RESULT
HeapObject * 		SlowAllocateRaw (int size_in_bytes)
 

Protected Attributes

int area_size_
 
intptr_t max_capacity_
 
AllocationStats accounting_stats_
 
Page anchor_
 
FreeList free_list_
 
AllocationInfo allocation_info_
 
int page_extra_
 
bool was_swept_conservatively_
 
Page * first_unswept_page_
 
intptr_t unswept_free_bytes_
 

Friends

class PageIterator
 

Detailed Description

Definition at line 1429 of file spaces.h.

Constructor & Destructor Documentation

PagedSpace ( Heap *  heap,
intptr_t  max_capacity,
AllocationSpace  id,
Executability  executable 
)

Definition at line 775 of file spaces.cc.

References PagedSpace::accounting_stats_, PagedSpace::allocation_info_, PagedSpace::anchor_, PagedSpace::area_size_, PagedSpace::AreaSize(), v8::internal::CODE_SPACE, Page::InitializeAsAnchor(), Heap::isolate(), MemoryChunk::kObjectStartOffset, Page::kPageSize, AllocationInfo::limit, PagedSpace::max_capacity_, Isolate::memory_allocator(), v8::internal::NULL, v8::internal::RoundDown(), and AllocationInfo::top.

virtual ~PagedSpace ( )
inlinevirtual

Definition at line 1437 of file spaces.h.

Member Function Documentation

bool AdvanceSweeper ( intptr_t  bytes_to_sweep)

Definition at line 2274 of file spaces.cc.

References PagedSpace::anchor(), PagedSpace::DecreaseUnsweptFreeBytes(), PagedSpace::first_unswept_page_, Heap::FreeQueuedChunks(), MemoryChunk::FromAddress(), Space::heap(), PagedSpace::IsSweepingComplete(), Page::next_page(), v8::internal::NULL, v8::internal::PrintF(), PagedSpace::ShouldBeSweptLazily(), MarkCompactCollector::SweepConservatively(), and V8PRIxPTR.

Referenced by Heap::AdvanceSweepers(), and PagedSpace::SlowAllocateRaw().

void Allocate ( int  bytes)
inline

Definition at line 1537 of file spaces.h.

References PagedSpace::accounting_stats_.

Referenced by PagedSpace::ReserveSpace().

HeapObject * AllocateLinearly ( int  size_in_bytes)
inlineprotected

Definition at line 252 of file spaces-inl.h.

References PagedSpace::allocation_info_, HeapObject::FromAddress(), AllocationInfo::limit, v8::internal::NULL, and AllocationInfo::top.

Referenced by PagedSpace::AllocateRaw().

MaybeObject * AllocateRaw ( int  size_in_bytes)
inline

Definition at line 263 of file spaces-inl.h.

References HeapObject::address(), PagedSpace::AllocateLinearly(), v8::internal::CODE_SPACE, PagedSpace::free_list_, Space::identity(), v8::internal::NULL, Failure::RetryAfterGC(), PagedSpace::SlowAllocateRaw(), and SkipList::Update().

Referenced by Heap::AllocateAsciiSymbol(), Heap::AllocateByteArray(), Heap::AllocateInternalSymbol(), Heap::AllocateRaw(), Heap::AllocateTwoByteSymbol(), Heap::CopyCode(), Heap::CreateCode(), TEST(), and MarkCompactCollector::TryPromoteObject().

Page* anchor ( )
inline

Definition at line 1552 of file spaces.h.

References PagedSpace::anchor_.

Referenced by PagedSpace::AdvanceSweeper(), PagedSpace::PrepareForMarkCompact(), and PagedSpace::ReleasePage().

int AreaSize ( )
inline

Definition at line 1626 of file spaces.h.

References PagedSpace::area_size_.

Referenced by PagedSpace::CanExpand(), MarkCompactCollector::CollectEvacuationCandidates(), Heap::CopyCode(), PagedSpace::Expand(), PagedSpace::PagedSpace(), PagedSpace::ReleaseAllUnusedPages(), PagedSpace::ReleasePage(), PagedSpace::ReserveSpace(), and PagedSpace::SizeOfFirstPage().

intptr_t Available ( )
inline

Definition at line 1486 of file spaces.h.

References PagedSpace::free_list_.

Referenced by Heap::Available(), Heap::PrintShortHeapStatistics(), and TEST().

bool CanExpand ( )

Definition at line 840 of file spaces.cc.

References PagedSpace::AreaSize(), ASSERT, PagedSpace::Capacity(), and PagedSpace::max_capacity_.

Referenced by PagedSpace::Expand().

intptr_t Capacity ( )
inline

Definition at line 1467 of file spaces.h.

References PagedSpace::accounting_stats_.

Referenced by PagedSpace::CanExpand(), Heap::Capacity(), PagedSpace::CommittedMemory(), PagedSpace::Expand(), Heap::RecordStats(), and PagedSpace::ReleasePage().

void ClearStats ( )
inline

Definition at line 1478 of file spaces.h.

References PagedSpace::accounting_stats_.

intptr_t CommittedMemory ( )
inline

Definition at line 1471 of file spaces.h.

References PagedSpace::Capacity().

Referenced by Heap::CommittedMemory().

bool Contains ( Address  a)
inline

Definition at line 178 of file spaces-inl.h.

References MemoryChunk::FromAddress(), MemoryChunk::is_valid(), and MemoryChunk::owner().

Referenced by StoreBuffer::Compact(), Heap::Contains(), StoreBuffer::EnterDirectlyIntoStoreBuffer(), PagedSpace::FindObject(), Heap::InSpace(), and StoreBuffer::Mark().

bool Contains ( HeapObject *  o)
inline

Definition at line 1455 of file spaces.h.

References HeapObject::address(), and PagedSpace::Contains().

Referenced by PagedSpace::Contains().

void CountFreeListItems ( Page *  p,
FreeList::SizeStats *  sizes 
)
inline

Definition at line 1614 of file spaces.h.

References PagedSpace::free_list_.

Referenced by MarkCompactCollector::CollectEvacuationCandidates().

int CountTotalPages ( )

Definition at line 906 of file spaces.cc.

References PagedSpace::PageIterator.

Referenced by MarkCompactCollector::CollectEvacuationCandidates().

void DecreaseUnsweptFreeBytes ( Page *  p)
inline

Definition at line 1600 of file spaces.h.

References MemoryChunk::area_size(), ASSERT, MemoryChunk::LiveBytes(), PagedSpace::ShouldBeSweptLazily(), and PagedSpace::unswept_free_bytes_.

Referenced by PagedSpace::AdvanceSweeper(), and PagedSpace::ReleasePage().

void EvictEvacuationCandidatesFromFreeLists ( )

Definition at line 2304 of file spaces.cc.

References PagedSpace::allocation_info_, Heap::CreateFillerObjectAt(), Space::heap(), AllocationInfo::limit, v8::internal::NULL, and AllocationInfo::top.

Referenced by MarkCompactCollector::StartCompaction().

bool Expand ( )
protected

Definition at line 853 of file spaces.cc.

References MemoryAllocator::AllocatePage(), PagedSpace::anchor_, PagedSpace::AreaSize(), ASSERT, PagedSpace::CanExpand(), PagedSpace::Capacity(), Space::executable(), Space::heap(), MemoryChunk::InsertAfter(), Heap::isolate(), PagedSpace::max_capacity_, Isolate::memory_allocator(), Page::next_page(), v8::internal::NULL, Page::prev_page(), and PagedSpace::SizeOfFirstPage().

Referenced by PagedSpace::SlowAllocateRaw().

MaybeObject * FindObject ( Address  addr)

Definition at line 822 of file spaces.cc.

References ASSERT, PagedSpace::Contains(), Failure::Exception(), MemoryChunk::FromAddress(), Space::heap(), HeapObjectIterator::Next(), v8::internal::NULL, and UNREACHABLE.

Page* FirstPage ( )
inline

Definition at line 1611 of file spaces.h.

References PagedSpace::anchor_, and Page::next_page().

Referenced by TEST().

int Free ( Address  start,
int  size_in_bytes 
)
inline

Definition at line 1519 of file spaces.h.

References PagedSpace::accounting_stats_, and PagedSpace::free_list_.

Referenced by Page::Initialize(), PagedSpace::PrepareForMarkCompact(), PagedSpace::ReserveSpace(), and MarkCompactCollector::SweepConservatively().

bool HasBeenSetUp ( )

Definition at line 806 of file spaces.cc.

void IncreaseCapacity ( int  size)
inline

Definition at line 1541 of file spaces.h.

References PagedSpace::accounting_stats_.

Referenced by Page::Initialize().

void IncreaseUnsweptFreeBytes ( Page *  p)
inline

Definition at line 1595 of file spaces.h.

References MemoryChunk::area_size(), ASSERT, MemoryChunk::LiveBytes(), PagedSpace::ShouldBeSweptLazily(), and PagedSpace::unswept_free_bytes_.

void IncrementUnsweptFreeBytes ( int  by)
inline

Definition at line 1591 of file spaces.h.

References PagedSpace::unswept_free_bytes_.

bool IsSweepingComplete ( )
inline

Definition at line 1607 of file spaces.h.

References PagedSpace::first_unswept_page_, and MemoryChunk::is_valid().

Referenced by PagedSpace::AdvanceSweeper(), Heap::IsSweepingComplete(), PagedSpace::SizeOfObjects(), PagedSpace::SlowAllocateRaw(), and IncrementalMarking::Start().

Page* LastPage ( )
inline

Definition at line 1612 of file spaces.h.

References PagedSpace::anchor_, and Page::prev_page().

Referenced by TEST().

Address limit ( )
inline

Definition at line 1507 of file spaces.h.

References PagedSpace::allocation_info_, and AllocationInfo::limit.

Referenced by InnerPointerToCodeCache::GcSafeFindCodeForInnerPointer(), PagedSpace::PrepareForMarkCompact(), PagedSpace::ReserveSpace(), PagedSpace::SetTop(), and PagedSpace::SizeOfObjects().

void PrepareForMarkCompact ( )
virtual

Reimplemented in FixedSpace.

Definition at line 2208 of file spaces.cc.

References PagedSpace::anchor(), Bitmap::Clear(), PagedSpace::first_unswept_page_, PagedSpace::Free(), PagedSpace::free_list_, MemoryChunk::FromAddress(), PagedSpace::limit(), Page::next_page(), v8::internal::NULL, v8::internal::PrintF(), PagedSpace::SetTop(), PagedSpace::top(), PagedSpace::unswept_free_bytes_, V8PRIxPTR, and Page::WasSwept().

Referenced by FixedSpace::PrepareForMarkCompact().

void ReleaseAllUnusedPages ( )

Definition at line 953 of file spaces.cc.

References MemoryChunk::area_start(), PagedSpace::AreaSize(), FreeSpace::cast(), PagedSpace::free_list_, Heap::FreeQueuedChunks(), HeapObject::FromAddress(), Space::heap(), MemoryChunk::LiveBytes(), PagedSpace::PageIterator, PagedSpace::ReleasePage(), FreeSpace::size(), and Page::WasSwept().

void ReleasePage ( Page *  page)

Definition at line 917 of file spaces.cc.

References PagedSpace::accounting_stats_, PagedSpace::allocation_info_, PagedSpace::anchor(), MemoryChunk::area_size(), PagedSpace::AreaSize(), ASSERT, ASSERT_EQ, PagedSpace::Capacity(), MemoryChunk::CONTAINS_ONLY_DATA, PagedSpace::DecreaseUnsweptFreeBytes(), PagedSpace::first_unswept_page_, MemoryAllocator::Free(), PagedSpace::free_list_, MemoryChunk::FromAddress(), Space::heap(), MemoryChunk::IsFlagSet(), Heap::isolate(), AllocationInfo::limit, MemoryChunk::LiveBytes(), Isolate::memory_allocator(), Page::next_page(), v8::internal::NULL, Heap::QueueMemoryChunkForFree(), AllocationInfo::top, MemoryChunk::Unlink(), and Page::WasSwept().

Referenced by PagedSpace::ReleaseAllUnusedPages().

bool ReserveSpace ( int  bytes)
virtual

Implements Space.

Definition at line 2242 of file spaces.cc.

References HeapObject::address(), PagedSpace::Allocate(), PagedSpace::allocation_info_, PagedSpace::AreaSize(), ASSERT, PagedSpace::Free(), PagedSpace::free_list_, AllocationInfo::limit, PagedSpace::limit(), v8::internal::NULL, Space::RoundSizeDownToObjectAlignment(), PagedSpace::SetTop(), PagedSpace::SlowAllocateRaw(), AllocationInfo::top, and PagedSpace::top().

Referenced by Heap::ReserveSpace().

void ResetFreeList ( )
inline

Definition at line 1525 of file spaces.h.

References PagedSpace::free_list_.

void set_was_swept_conservatively ( bool  b)
inline

Definition at line 1575 of file spaces.h.

References PagedSpace::was_swept_conservatively_.

void SetPagesToSweep ( Page *  first)
inline

Definition at line 1585 of file spaces.h.

References PagedSpace::anchor_, ASSERT, PagedSpace::first_unswept_page_, v8::internal::NULL, and PagedSpace::unswept_free_bytes_.

void SetTop ( Address  top,
Address  limit 
)
inline

Definition at line 1530 of file spaces.h.

References PagedSpace::allocation_info_, ASSERT, MemoryChunk::FromAddress(), AllocationInfo::limit, PagedSpace::limit(), AllocationInfo::top, and PagedSpace::top().

Referenced by PagedSpace::PrepareForMarkCompact(), and PagedSpace::ReserveSpace().

bool SetUp ( )

Definition at line 801 of file spaces.cc.

Referenced by Heap::SetUp(), and TEST().

static bool ShouldBeSweptLazily ( Page *  p)
inlinestatic

Definition at line 1579 of file spaces.h.

References MemoryChunk::IsEvacuationCandidate(), MemoryChunk::IsFlagSet(), MemoryChunk::RESCAN_ON_EVACUATION, and Page::WasSweptPrecisely().

Referenced by PagedSpace::AdvanceSweeper(), PagedSpace::DecreaseUnsweptFreeBytes(), and PagedSpace::IncreaseUnsweptFreeBytes().

virtual intptr_t Size ( )
inlinevirtual

Implements Space.

Definition at line 1491 of file spaces.h.

References PagedSpace::accounting_stats_.

Referenced by Heap::PrintShortHeapStatistics(), and PagedSpace::SizeOfObjects().

intptr_t SizeOfFirstPage ( )
protected

Definition at line 874 of file spaces.cc.

References PagedSpace::AreaSize(), v8::internal::CELL_SPACE, v8::internal::CODE_SPACE, Space::identity(), v8::internal::KB, v8::internal::kPointerSize, v8::internal::MAP_SPACE, v8::internal::Min(), v8::internal::OLD_DATA_SPACE, v8::internal::OLD_POINTER_SPACE, and UNREACHABLE.

Referenced by PagedSpace::Expand().

virtual intptr_t SizeOfObjects ( )
inlinevirtual

Reimplemented from Space.

Definition at line 1495 of file spaces.h.

References ASSERT, PagedSpace::IsSweepingComplete(), PagedSpace::limit(), PagedSpace::Size(), PagedSpace::top(), and PagedSpace::unswept_free_bytes_.

Referenced by MarkCompactCollector::CollectEvacuationCandidates(), Heap::PromotedSpaceSizeOfObjects(), and Heap::RecordStats().

HeapObject * SlowAllocateRaw ( int  size_in_bytes)
protectedvirtual

Definition at line 2319 of file spaces.cc.

References PagedSpace::AdvanceSweeper(), PagedSpace::Expand(), PagedSpace::first_unswept_page_, PagedSpace::free_list_, Space::heap(), MemoryChunk::is_valid(), PagedSpace::IsSweepingComplete(), v8::internal::kMaxInt, and v8::internal::NULL.

Referenced by PagedSpace::AllocateRaw(), and PagedSpace::ReserveSpace().

void TearDown ( )

Definition at line 811 of file spaces.cc.

References PagedSpace::accounting_stats_, PagedSpace::anchor_, MemoryAllocator::Free(), Space::heap(), Heap::isolate(), Isolate::memory_allocator(), PagedSpace::PageIterator, Page::set_next_page(), and Page::set_prev_page().

Referenced by Heap::TearDown(), and TEST().

Address top ( )
inline

Definition at line 1506 of file spaces.h.

References PagedSpace::allocation_info_, and AllocationInfo::top.

Referenced by InnerPointerToCodeCache::GcSafeFindCodeForInnerPointer(), PagedSpace::PrepareForMarkCompact(), PagedSpace::ReserveSpace(), PagedSpace::SetTop(), and PagedSpace::SizeOfObjects().

bool was_swept_conservatively ( )
inline

Definition at line 1574 of file spaces.h.

References PagedSpace::was_swept_conservatively_.

Referenced by HeapSnapshotGenerator::GenerateSnapshot().

virtual intptr_t Waste ( )
inlinevirtual

Definition at line 1503 of file spaces.h.

References PagedSpace::accounting_stats_.

Referenced by Heap::PrintShortHeapStatistics().

Friends And Related Function Documentation

friend class PageIterator
friend

Definition at line 1679 of file spaces.h.

Referenced by PagedSpace::CountTotalPages(), PagedSpace::ReleaseAllUnusedPages(), and PagedSpace::TearDown().

Field Documentation

AllocationStats accounting_stats_
protected

Definition at line 1639 of file spaces.h.

Referenced by PagedSpace::Allocate(), PagedSpace::Capacity(), PagedSpace::ClearStats(), PagedSpace::Free(), PagedSpace::IncreaseCapacity(), PagedSpace::PagedSpace(), FixedSpace::PrepareForMarkCompact(), PagedSpace::ReleasePage(), PagedSpace::Size(), PagedSpace::TearDown(), and PagedSpace::Waste().

AllocationInfo allocation_info_
protected

Definition at line 1648 of file spaces.h.

Referenced by PagedSpace::AllocateLinearly(), PagedSpace::EvictEvacuationCandidatesFromFreeLists(), PagedSpace::limit(), PagedSpace::PagedSpace(), PagedSpace::ReleasePage(), PagedSpace::ReserveSpace(), PagedSpace::SetTop(), and PagedSpace::top().

Page anchor_
protected

Definition at line 1642 of file spaces.h.

Referenced by PagedSpace::anchor(), PagedSpace::Expand(), PagedSpace::FirstPage(), PagedSpace::LastPage(), PagedSpace::PagedSpace(), PagedSpace::SetPagesToSweep(), and PagedSpace::TearDown().

int area_size_
protected

Definition at line 1631 of file spaces.h.

Referenced by PagedSpace::AreaSize(), and PagedSpace::PagedSpace().

Page* first_unswept_page_
protected

Definition at line 1660 of file spaces.h.

Referenced by PagedSpace::AdvanceSweeper(), PagedSpace::IsSweepingComplete(), PagedSpace::PrepareForMarkCompact(), PagedSpace::ReleasePage(), PagedSpace::SetPagesToSweep(), and PagedSpace::SlowAllocateRaw().

FreeList free_list_
protected

Definition at line 1645 of file spaces.h.

Referenced by PagedSpace::AllocateRaw(), PagedSpace::Available(), PagedSpace::CountFreeListItems(), PagedSpace::Free(), PagedSpace::PrepareForMarkCompact(), FixedSpace::PrepareForMarkCompact(), PagedSpace::ReleaseAllUnusedPages(), PagedSpace::ReleasePage(), PagedSpace::ReserveSpace(), PagedSpace::ResetFreeList(), and PagedSpace::SlowAllocateRaw().

intptr_t max_capacity_
protected

Definition at line 1634 of file spaces.h.

Referenced by PagedSpace::CanExpand(), PagedSpace::Expand(), and PagedSpace::PagedSpace().

int page_extra_
protected

Definition at line 1654 of file spaces.h.

Referenced by FixedSpace::FixedSpace(), OldSpace::OldSpace(), and FixedSpace::PageAllocationLimit().

intptr_t unswept_free_bytes_
protected

Definition at line 1665 of file spaces.h.

Referenced by PagedSpace::DecreaseUnsweptFreeBytes(), PagedSpace::IncreaseUnsweptFreeBytes(), PagedSpace::IncrementUnsweptFreeBytes(), PagedSpace::PrepareForMarkCompact(), PagedSpace::SetPagesToSweep(), and PagedSpace::SizeOfObjects().

bool was_swept_conservatively_
protected

Definition at line 1656 of file spaces.h.

Referenced by PagedSpace::set_was_swept_conservatively(), and PagedSpace::was_swept_conservatively().

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