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Unified Diff: src/heap/mark-compact.cc

Issue 1343043002: [heap] Move slots buffer into a separate file. (Closed) Base URL: https://chromium.googlesource.com/v8/v8.git@master
Patch Set: Created 5 years, 3 months ago
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Index: src/heap/mark-compact.cc
diff --git a/src/heap/mark-compact.cc b/src/heap/mark-compact.cc
index 7757b2cef5adbf10559a02f29b297fd80559bde0..aa8b39894797b84af0524089cc65f1f01e7c928c 100644
--- a/src/heap/mark-compact.cc
+++ b/src/heap/mark-compact.cc
@@ -21,6 +21,7 @@
#include "src/heap/object-stats.h"
#include "src/heap/objects-visiting.h"
#include "src/heap/objects-visiting-inl.h"
+#include "src/heap/slots-buffer.h"
#include "src/heap/spaces-inl.h"
#include "src/heap-profiler.h"
#include "src/ic/ic.h"
@@ -58,6 +59,7 @@ MarkCompactCollector::MarkCompactCollector(Heap* heap)
pending_sweeper_jobs_semaphore_(0),
pending_compaction_jobs_semaphore_(0),
evacuation_(false),
+ slots_buffer_allocator_(NULL),
migration_slots_buffer_(NULL),
heap_(heap),
marking_deque_memory_(NULL),
@@ -239,12 +241,14 @@ void MarkCompactCollector::SetUp() {
free_list_map_space_.Reset(new FreeList(heap_->map_space()));
EnsureMarkingDequeIsReserved();
EnsureMarkingDequeIsCommitted(kMinMarkingDequeSize);
+ slots_buffer_allocator_ = new SlotsBufferAllocator();
}
void MarkCompactCollector::TearDown() {
AbortCompaction();
delete marking_deque_memory_;
+ delete slots_buffer_allocator_;
}
@@ -791,7 +795,7 @@ void MarkCompactCollector::AbortCompaction() {
int npages = evacuation_candidates_.length();
for (int i = 0; i < npages; i++) {
Page* p = evacuation_candidates_[i];
- slots_buffer_allocator_.DeallocateChain(p->slots_buffer_address());
+ slots_buffer_allocator_->DeallocateChain(p->slots_buffer_address());
p->ClearEvacuationCandidate();
p->ClearFlag(MemoryChunk::RESCAN_ON_EVACUATION);
}
@@ -2565,11 +2569,11 @@ void MarkCompactCollector::RecordMigratedSlot(Object* value, Address slot) {
} else if (value->IsHeapObject() && IsOnEvacuationCandidate(value)) {
if (parallel_compaction_in_progress_) {
SlotsBuffer::AddToSynchronized(
- &slots_buffer_allocator_, &migration_slots_buffer_,
+ slots_buffer_allocator_, &migration_slots_buffer_,
&migration_slots_buffer_mutex_, reinterpret_cast<Object**>(slot),
SlotsBuffer::IGNORE_OVERFLOW);
} else {
- SlotsBuffer::AddTo(&slots_buffer_allocator_, &migration_slots_buffer_,
+ SlotsBuffer::AddTo(slots_buffer_allocator_, &migration_slots_buffer_,
reinterpret_cast<Object**>(slot),
SlotsBuffer::IGNORE_OVERFLOW);
}
@@ -2577,16 +2581,42 @@ void MarkCompactCollector::RecordMigratedSlot(Object* value, Address slot) {
}
+void MarkCompactCollector::RecordSlot(HeapObject* object, Object** slot,
+ Object* target) {
+ Page* target_page = Page::FromAddress(reinterpret_cast<Address>(target));
+ if (target_page->IsEvacuationCandidate() &&
+ !ShouldSkipEvacuationSlotRecording(object)) {
+ if (!SlotsBuffer::AddTo(slots_buffer_allocator_,
+ target_page->slots_buffer_address(), slot,
+ SlotsBuffer::FAIL_ON_OVERFLOW)) {
+ EvictPopularEvacuationCandidate(target_page);
+ }
+ }
+}
+
+
+void MarkCompactCollector::ForceRecordSlot(HeapObject* object, Object** slot,
+ Object* target) {
+ Page* target_page = Page::FromAddress(reinterpret_cast<Address>(target));
+ if (target_page->IsEvacuationCandidate() &&
+ !ShouldSkipEvacuationSlotRecording(object)) {
+ SlotsBuffer::AddTo(slots_buffer_allocator_,
+ target_page->slots_buffer_address(), slot,
+ SlotsBuffer::IGNORE_OVERFLOW);
+ }
+}
+
+
void MarkCompactCollector::RecordMigratedCodeEntrySlot(
Address code_entry, Address code_entry_slot) {
if (Page::FromAddress(code_entry)->IsEvacuationCandidate()) {
if (parallel_compaction_in_progress_) {
SlotsBuffer::AddToSynchronized(
- &slots_buffer_allocator_, &migration_slots_buffer_,
+ slots_buffer_allocator_, &migration_slots_buffer_,
&migration_slots_buffer_mutex_, SlotsBuffer::CODE_ENTRY_SLOT,
code_entry_slot, SlotsBuffer::IGNORE_OVERFLOW);
} else {
- SlotsBuffer::AddTo(&slots_buffer_allocator_, &migration_slots_buffer_,
+ SlotsBuffer::AddTo(slots_buffer_allocator_, &migration_slots_buffer_,
SlotsBuffer::CODE_ENTRY_SLOT, code_entry_slot,
SlotsBuffer::IGNORE_OVERFLOW);
}
@@ -2597,17 +2627,65 @@ void MarkCompactCollector::RecordMigratedCodeEntrySlot(
void MarkCompactCollector::RecordMigratedCodeObjectSlot(Address code_object) {
if (parallel_compaction_in_progress_) {
SlotsBuffer::AddToSynchronized(
- &slots_buffer_allocator_, &migration_slots_buffer_,
+ slots_buffer_allocator_, &migration_slots_buffer_,
&migration_slots_buffer_mutex_, SlotsBuffer::RELOCATED_CODE_OBJECT,
code_object, SlotsBuffer::IGNORE_OVERFLOW);
} else {
- SlotsBuffer::AddTo(&slots_buffer_allocator_, &migration_slots_buffer_,
+ SlotsBuffer::AddTo(slots_buffer_allocator_, &migration_slots_buffer_,
SlotsBuffer::RELOCATED_CODE_OBJECT, code_object,
SlotsBuffer::IGNORE_OVERFLOW);
}
}
+static inline SlotsBuffer::SlotType SlotTypeForRMode(RelocInfo::Mode rmode) {
+ if (RelocInfo::IsCodeTarget(rmode)) {
+ return SlotsBuffer::CODE_TARGET_SLOT;
+ } else if (RelocInfo::IsCell(rmode)) {
+ return SlotsBuffer::CELL_TARGET_SLOT;
+ } else if (RelocInfo::IsEmbeddedObject(rmode)) {
+ return SlotsBuffer::EMBEDDED_OBJECT_SLOT;
+ } else if (RelocInfo::IsDebugBreakSlot(rmode)) {
+ return SlotsBuffer::DEBUG_TARGET_SLOT;
+ }
+ UNREACHABLE();
+ return SlotsBuffer::NUMBER_OF_SLOT_TYPES;
+}
+
+
+static inline SlotsBuffer::SlotType DecodeSlotType(
+ SlotsBuffer::ObjectSlot slot) {
+ return static_cast<SlotsBuffer::SlotType>(reinterpret_cast<intptr_t>(slot));
+}
+
+
+void MarkCompactCollector::RecordRelocSlot(RelocInfo* rinfo, Object* target) {
+ Page* target_page = Page::FromAddress(reinterpret_cast<Address>(target));
+ RelocInfo::Mode rmode = rinfo->rmode();
+ if (target_page->IsEvacuationCandidate() &&
+ (rinfo->host() == NULL ||
+ !ShouldSkipEvacuationSlotRecording(rinfo->host()))) {
+ Address addr = rinfo->pc();
+ SlotsBuffer::SlotType slot_type = SlotTypeForRMode(rmode);
+ if (rinfo->IsInConstantPool()) {
+ addr = rinfo->constant_pool_entry_address();
+ if (RelocInfo::IsCodeTarget(rmode)) {
+ slot_type = SlotsBuffer::CODE_ENTRY_SLOT;
+ } else {
+ DCHECK(RelocInfo::IsEmbeddedObject(rmode));
+ slot_type = SlotsBuffer::OBJECT_SLOT;
+ }
+ }
+ bool success = SlotsBuffer::AddTo(
+ slots_buffer_allocator_, target_page->slots_buffer_address(), slot_type,
+ addr, SlotsBuffer::FAIL_ON_OVERFLOW);
+ if (!success) {
+ EvictPopularEvacuationCandidate(target_page);
+ }
+ }
+}
+
+
// We scavenge new space simultaneously with sweeping. This is done in two
// passes.
//
@@ -2722,6 +2800,49 @@ void MarkCompactCollector::MigrateObjectRaw(HeapObject* dst, HeapObject* src,
}
+static inline void UpdateSlot(Isolate* isolate, ObjectVisitor* v,
+ SlotsBuffer::SlotType slot_type, Address addr) {
+ switch (slot_type) {
+ case SlotsBuffer::CODE_TARGET_SLOT: {
+ RelocInfo rinfo(addr, RelocInfo::CODE_TARGET, 0, NULL);
+ rinfo.Visit(isolate, v);
+ break;
+ }
+ case SlotsBuffer::CELL_TARGET_SLOT: {
+ RelocInfo rinfo(addr, RelocInfo::CELL, 0, NULL);
+ rinfo.Visit(isolate, v);
+ break;
+ }
+ case SlotsBuffer::CODE_ENTRY_SLOT: {
+ v->VisitCodeEntry(addr);
+ break;
+ }
+ case SlotsBuffer::RELOCATED_CODE_OBJECT: {
+ HeapObject* obj = HeapObject::FromAddress(addr);
+ Code::cast(obj)->CodeIterateBody(v);
+ break;
+ }
+ case SlotsBuffer::DEBUG_TARGET_SLOT: {
+ RelocInfo rinfo(addr, RelocInfo::DEBUG_BREAK_SLOT_AT_POSITION, 0, NULL);
+ if (rinfo.IsPatchedDebugBreakSlotSequence()) rinfo.Visit(isolate, v);
+ break;
+ }
+ case SlotsBuffer::EMBEDDED_OBJECT_SLOT: {
+ RelocInfo rinfo(addr, RelocInfo::EMBEDDED_OBJECT, 0, NULL);
+ rinfo.Visit(isolate, v);
+ break;
+ }
+ case SlotsBuffer::OBJECT_SLOT: {
+ v->VisitPointer(reinterpret_cast<Object**>(addr));
+ break;
+ }
+ default:
+ UNREACHABLE();
+ break;
+ }
+}
+
+
// Visitor for updating pointers from live objects in old spaces to new space.
// It does not expect to encounter pointers to dead objects.
class PointersUpdatingVisitor : public ObjectVisitor {
@@ -2914,6 +3035,32 @@ void PointersUpdatingVisitor::CheckLayoutDescriptorAndDie(Heap* heap,
#endif
+void MarkCompactCollector::UpdateSlots(SlotsBuffer* buffer) {
+ PointersUpdatingVisitor v(heap_);
+ size_t buffer_size = buffer->Size();
+
+ for (size_t slot_idx = 0; slot_idx < buffer_size; ++slot_idx) {
+ SlotsBuffer::ObjectSlot slot = buffer->Get(slot_idx);
+ if (!SlotsBuffer::IsTypedSlot(slot)) {
+ PointersUpdatingVisitor::UpdateSlot(heap_, slot);
+ } else {
+ ++slot_idx;
+ DCHECK(slot_idx < buffer_size);
+ UpdateSlot(heap_->isolate(), &v, DecodeSlotType(slot),
+ reinterpret_cast<Address>(buffer->Get(slot_idx)));
+ }
+ }
+}
+
+
+void MarkCompactCollector::UpdateSlotsRecordedIn(SlotsBuffer* buffer) {
+ while (buffer != NULL) {
+ UpdateSlots(buffer);
+ buffer = buffer->next();
+ }
+}
+
+
static void UpdatePointer(HeapObject** address, HeapObject* object) {
MapWord map_word = object->map_word();
// The store buffer can still contain stale pointers in dead large objects.
@@ -3267,7 +3414,8 @@ void MarkCompactCollector::EvacuatePages() {
// Pessimistically abandon unevacuated pages.
for (int j = i; j < npages; j++) {
Page* page = evacuation_candidates_[j];
- slots_buffer_allocator_.DeallocateChain(page->slots_buffer_address());
+ slots_buffer_allocator_->DeallocateChain(
+ page->slots_buffer_address());
page->ClearEvacuationCandidate();
page->SetFlag(Page::RESCAN_ON_EVACUATION);
}
@@ -3314,49 +3462,6 @@ class EvacuationWeakObjectRetainer : public WeakObjectRetainer {
};
-static inline void UpdateSlot(Isolate* isolate, ObjectVisitor* v,
- SlotsBuffer::SlotType slot_type, Address addr) {
- switch (slot_type) {
- case SlotsBuffer::CODE_TARGET_SLOT: {
- RelocInfo rinfo(addr, RelocInfo::CODE_TARGET, 0, NULL);
- rinfo.Visit(isolate, v);
- break;
- }
- case SlotsBuffer::CELL_TARGET_SLOT: {
- RelocInfo rinfo(addr, RelocInfo::CELL, 0, NULL);
- rinfo.Visit(isolate, v);
- break;
- }
- case SlotsBuffer::CODE_ENTRY_SLOT: {
- v->VisitCodeEntry(addr);
- break;
- }
- case SlotsBuffer::RELOCATED_CODE_OBJECT: {
- HeapObject* obj = HeapObject::FromAddress(addr);
- Code::cast(obj)->CodeIterateBody(v);
- break;
- }
- case SlotsBuffer::DEBUG_TARGET_SLOT: {
- RelocInfo rinfo(addr, RelocInfo::DEBUG_BREAK_SLOT_AT_POSITION, 0, NULL);
- if (rinfo.IsPatchedDebugBreakSlotSequence()) rinfo.Visit(isolate, v);
- break;
- }
- case SlotsBuffer::EMBEDDED_OBJECT_SLOT: {
- RelocInfo rinfo(addr, RelocInfo::EMBEDDED_OBJECT, 0, NULL);
- rinfo.Visit(isolate, v);
- break;
- }
- case SlotsBuffer::OBJECT_SLOT: {
- v->VisitPointer(reinterpret_cast<Object**>(addr));
- break;
- }
- default:
- UNREACHABLE();
- break;
- }
-}
-
-
enum SweepingMode { SWEEP_ONLY, SWEEP_AND_VISIT_LIVE_OBJECTS };
@@ -3469,24 +3574,6 @@ static int Sweep(PagedSpace* space, FreeList* free_list, Page* p,
}
-static bool IsOnInvalidatedCodeObject(Address addr) {
Hannes Payer (out of office) 2015/09/15 09:42:53 unused.
- // We did not record any slots in large objects thus
- // we can safely go to the page from the slot address.
- Page* p = Page::FromAddress(addr);
-
- // First check owner's identity because old space is swept concurrently or
- // lazily and might still have non-zero mark-bits on some pages.
- if (p->owner()->identity() != CODE_SPACE) return false;
-
- // In code space only bits on evacuation candidates (but we don't record
- // any slots on them) and under invalidated code objects are non-zero.
- MarkBit mark_bit =
- p->markbits()->MarkBitFromIndex(Page::FastAddressToMarkbitIndex(addr));
-
- return Marking::IsBlackOrGrey(mark_bit);
-}
-
-
void MarkCompactCollector::InvalidateCode(Code* code) {
if (heap_->incremental_marking()->IsCompacting() &&
!ShouldSkipEvacuationSlotRecording(code)) {
@@ -3584,7 +3671,7 @@ void MarkCompactCollector::EvacuateNewSpaceAndCandidates() {
{
GCTracer::Scope gc_scope(heap()->tracer(),
GCTracer::Scope::MC_UPDATE_POINTERS_TO_EVACUATED);
- SlotsBuffer::UpdateSlotsRecordedIn(heap_, migration_slots_buffer_);
+ UpdateSlotsRecordedIn(migration_slots_buffer_);
if (FLAG_trace_fragmentation_verbose) {
PrintF(" migration slots buffer: %d\n",
SlotsBuffer::SizeOfChain(migration_slots_buffer_));
@@ -3602,7 +3689,7 @@ void MarkCompactCollector::EvacuateNewSpaceAndCandidates() {
p->IsFlagSet(Page::RESCAN_ON_EVACUATION));
if (p->IsEvacuationCandidate()) {
- SlotsBuffer::UpdateSlotsRecordedIn(heap_, p->slots_buffer());
+ UpdateSlotsRecordedIn(p->slots_buffer());
if (FLAG_trace_fragmentation_verbose) {
PrintF(" page %p slots buffer: %d\n", reinterpret_cast<void*>(p),
SlotsBuffer::SizeOfChain(p->slots_buffer()));
@@ -3660,7 +3747,7 @@ void MarkCompactCollector::EvacuateNewSpaceAndCandidates() {
heap_->isolate()->inner_pointer_to_code_cache()->Flush();
- slots_buffer_allocator_.DeallocateChain(&migration_slots_buffer_);
+ slots_buffer_allocator_->DeallocateChain(&migration_slots_buffer_);
DCHECK(migration_slots_buffer_ == NULL);
// The hashing of weak_object_to_code_table is no longer valid.
@@ -3689,7 +3776,7 @@ void MarkCompactCollector::ReleaseEvacuationCandidates() {
PagedSpace* space = static_cast<PagedSpace*>(p->owner());
space->Free(p->area_start(), p->area_size());
p->set_scan_on_scavenge(false);
- slots_buffer_allocator_.DeallocateChain(p->slots_buffer_address());
+ slots_buffer_allocator_->DeallocateChain(p->slots_buffer_address());
p->ResetLiveBytes();
space->ReleasePage(p);
}
@@ -4382,183 +4469,6 @@ void MarkCompactCollector::Initialize() {
}
-bool SlotsBuffer::IsTypedSlot(ObjectSlot slot) {
- return reinterpret_cast<uintptr_t>(slot) < NUMBER_OF_SLOT_TYPES;
-}
-
-
-bool SlotsBuffer::AddToSynchronized(SlotsBufferAllocator* allocator,
- SlotsBuffer** buffer_address,
- base::Mutex* buffer_mutex, SlotType type,
- Address addr, AdditionMode mode) {
- base::LockGuard<base::Mutex> lock_guard(buffer_mutex);
- return AddTo(allocator, buffer_address, type, addr, mode);
-}
-
-
-bool SlotsBuffer::AddTo(SlotsBufferAllocator* allocator,
- SlotsBuffer** buffer_address, SlotType type,
- Address addr, AdditionMode mode) {
- SlotsBuffer* buffer = *buffer_address;
- if (buffer == NULL || !buffer->HasSpaceForTypedSlot()) {
- if (mode == FAIL_ON_OVERFLOW && ChainLengthThresholdReached(buffer)) {
- allocator->DeallocateChain(buffer_address);
- return false;
- }
- buffer = allocator->AllocateBuffer(buffer);
- *buffer_address = buffer;
- }
- DCHECK(buffer->HasSpaceForTypedSlot());
- buffer->Add(reinterpret_cast<ObjectSlot>(type));
- buffer->Add(reinterpret_cast<ObjectSlot>(addr));
- return true;
-}
-
-
-void SlotsBuffer::RemoveInvalidSlots(Heap* heap, SlotsBuffer* buffer) {
- // Remove entries by replacing them with an old-space slot containing a smi
- // that is located in an unmovable page.
- const ObjectSlot kRemovedEntry = HeapObject::RawField(
- heap->empty_fixed_array(), FixedArrayBase::kLengthOffset);
- DCHECK(Page::FromAddress(reinterpret_cast<Address>(kRemovedEntry))
- ->NeverEvacuate());
-
- while (buffer != NULL) {
- SlotsBuffer::ObjectSlot* slots = buffer->slots_;
- intptr_t slots_count = buffer->idx_;
-
- for (int slot_idx = 0; slot_idx < slots_count; ++slot_idx) {
- ObjectSlot slot = slots[slot_idx];
- if (!IsTypedSlot(slot)) {
- Object* object = *slot;
- // Slots are invalid when they currently:
- // - do not point to a heap object (SMI)
- // - point to a heap object in new space
- // - are not within a live heap object on a valid pointer slot
- // - point to a heap object not on an evacuation candidate
- if (!object->IsHeapObject() || heap->InNewSpace(object) ||
- !heap->mark_compact_collector()->IsSlotInLiveObject(
- reinterpret_cast<Address>(slot)) ||
- !Page::FromAddress(reinterpret_cast<Address>(object))
- ->IsEvacuationCandidate()) {
- // TODO(hpayer): Instead of replacing slots with kRemovedEntry we
- // could shrink the slots buffer in-place.
- slots[slot_idx] = kRemovedEntry;
- }
- } else {
- ++slot_idx;
- DCHECK(slot_idx < slots_count);
- }
- }
- buffer = buffer->next();
- }
-}
-
-
-void SlotsBuffer::RemoveObjectSlots(Heap* heap, SlotsBuffer* buffer,
- Address start_slot, Address end_slot) {
- // Remove entries by replacing them with an old-space slot containing a smi
- // that is located in an unmovable page.
- const ObjectSlot kRemovedEntry = HeapObject::RawField(
- heap->empty_fixed_array(), FixedArrayBase::kLengthOffset);
- DCHECK(Page::FromAddress(reinterpret_cast<Address>(kRemovedEntry))
- ->NeverEvacuate());
-
- while (buffer != NULL) {
- SlotsBuffer::ObjectSlot* slots = buffer->slots_;
- intptr_t slots_count = buffer->idx_;
- bool is_typed_slot = false;
-
- for (int slot_idx = 0; slot_idx < slots_count; ++slot_idx) {
- ObjectSlot slot = slots[slot_idx];
- if (!IsTypedSlot(slot)) {
- Address slot_address = reinterpret_cast<Address>(slot);
- if (slot_address >= start_slot && slot_address < end_slot) {
- // TODO(hpayer): Instead of replacing slots with kRemovedEntry we
- // could shrink the slots buffer in-place.
- slots[slot_idx] = kRemovedEntry;
- if (is_typed_slot) {
- slots[slot_idx - 1] = kRemovedEntry;
- }
- }
- is_typed_slot = false;
- } else {
- is_typed_slot = true;
- DCHECK(slot_idx < slots_count);
- }
- }
- buffer = buffer->next();
- }
-}
-
-
-void SlotsBuffer::VerifySlots(Heap* heap, SlotsBuffer* buffer) {
- while (buffer != NULL) {
- SlotsBuffer::ObjectSlot* slots = buffer->slots_;
- intptr_t slots_count = buffer->idx_;
-
- for (int slot_idx = 0; slot_idx < slots_count; ++slot_idx) {
- ObjectSlot slot = slots[slot_idx];
- if (!IsTypedSlot(slot)) {
- Object* object = *slot;
- if (object->IsHeapObject()) {
- HeapObject* heap_object = HeapObject::cast(object);
- CHECK(!heap->InNewSpace(object));
- heap->mark_compact_collector()->VerifyIsSlotInLiveObject(
- reinterpret_cast<Address>(slot), heap_object);
- }
- } else {
- ++slot_idx;
- DCHECK(slot_idx < slots_count);
- }
- }
- buffer = buffer->next();
- }
-}
-
-
-static inline SlotsBuffer::SlotType SlotTypeForRMode(RelocInfo::Mode rmode) {
- if (RelocInfo::IsCodeTarget(rmode)) {
- return SlotsBuffer::CODE_TARGET_SLOT;
- } else if (RelocInfo::IsCell(rmode)) {
- return SlotsBuffer::CELL_TARGET_SLOT;
- } else if (RelocInfo::IsEmbeddedObject(rmode)) {
- return SlotsBuffer::EMBEDDED_OBJECT_SLOT;
- } else if (RelocInfo::IsDebugBreakSlot(rmode)) {
- return SlotsBuffer::DEBUG_TARGET_SLOT;
- }
- UNREACHABLE();
- return SlotsBuffer::NUMBER_OF_SLOT_TYPES;
-}
-
-
-void MarkCompactCollector::RecordRelocSlot(RelocInfo* rinfo, Object* target) {
- Page* target_page = Page::FromAddress(reinterpret_cast<Address>(target));
- RelocInfo::Mode rmode = rinfo->rmode();
- if (target_page->IsEvacuationCandidate() &&
- (rinfo->host() == NULL ||
- !ShouldSkipEvacuationSlotRecording(rinfo->host()))) {
- Address addr = rinfo->pc();
- SlotsBuffer::SlotType slot_type = SlotTypeForRMode(rmode);
- if (rinfo->IsInConstantPool()) {
- addr = rinfo->constant_pool_entry_address();
- if (RelocInfo::IsCodeTarget(rmode)) {
- slot_type = SlotsBuffer::CODE_ENTRY_SLOT;
- } else {
- DCHECK(RelocInfo::IsEmbeddedObject(rmode));
- slot_type = SlotsBuffer::OBJECT_SLOT;
- }
- }
- bool success = SlotsBuffer::AddTo(
- &slots_buffer_allocator_, target_page->slots_buffer_address(),
- slot_type, addr, SlotsBuffer::FAIL_ON_OVERFLOW);
- if (!success) {
- EvictPopularEvacuationCandidate(target_page);
- }
- }
-}
-
-
void MarkCompactCollector::EvictPopularEvacuationCandidate(Page* page) {
if (FLAG_trace_fragmentation) {
PrintF("Page %p is too popular. Disabling evacuation.\n",
@@ -4587,7 +4497,7 @@ void MarkCompactCollector::RecordCodeEntrySlot(HeapObject* object, Address slot,
Page* target_page = Page::FromAddress(reinterpret_cast<Address>(target));
if (target_page->IsEvacuationCandidate() &&
!ShouldSkipEvacuationSlotRecording(object)) {
- if (!SlotsBuffer::AddTo(&slots_buffer_allocator_,
+ if (!SlotsBuffer::AddTo(slots_buffer_allocator_,
target_page->slots_buffer_address(),
SlotsBuffer::CODE_ENTRY_SLOT, slot,
SlotsBuffer::FAIL_ON_OVERFLOW)) {
@@ -4611,70 +4521,5 @@ void MarkCompactCollector::RecordCodeTargetPatch(Address pc, Code* target) {
}
}
-
-static inline SlotsBuffer::SlotType DecodeSlotType(
- SlotsBuffer::ObjectSlot slot) {
- return static_cast<SlotsBuffer::SlotType>(reinterpret_cast<intptr_t>(slot));
-}
-
-
-void SlotsBuffer::UpdateSlots(Heap* heap) {
- PointersUpdatingVisitor v(heap);
-
- for (int slot_idx = 0; slot_idx < idx_; ++slot_idx) {
- ObjectSlot slot = slots_[slot_idx];
- if (!IsTypedSlot(slot)) {
- PointersUpdatingVisitor::UpdateSlot(heap, slot);
- } else {
- ++slot_idx;
- DCHECK(slot_idx < idx_);
- UpdateSlot(heap->isolate(), &v, DecodeSlotType(slot),
- reinterpret_cast<Address>(slots_[slot_idx]));
- }
- }
-}
-
-
-void SlotsBuffer::UpdateSlotsWithFilter(Heap* heap) {
Hannes Payer (out of office) 2015/09/15 09:42:53 Unused.
- PointersUpdatingVisitor v(heap);
-
- for (int slot_idx = 0; slot_idx < idx_; ++slot_idx) {
- ObjectSlot slot = slots_[slot_idx];
- if (!IsTypedSlot(slot)) {
- if (!IsOnInvalidatedCodeObject(reinterpret_cast<Address>(slot))) {
- PointersUpdatingVisitor::UpdateSlot(heap, slot);
- }
- } else {
- ++slot_idx;
- DCHECK(slot_idx < idx_);
- Address pc = reinterpret_cast<Address>(slots_[slot_idx]);
- if (!IsOnInvalidatedCodeObject(pc)) {
- UpdateSlot(heap->isolate(), &v, DecodeSlotType(slot),
- reinterpret_cast<Address>(slots_[slot_idx]));
- }
- }
- }
-}
-
-
-SlotsBuffer* SlotsBufferAllocator::AllocateBuffer(SlotsBuffer* next_buffer) {
- return new SlotsBuffer(next_buffer);
-}
-
-
-void SlotsBufferAllocator::DeallocateBuffer(SlotsBuffer* buffer) {
- delete buffer;
-}
-
-
-void SlotsBufferAllocator::DeallocateChain(SlotsBuffer** buffer_address) {
- SlotsBuffer* buffer = *buffer_address;
- while (buffer != NULL) {
- SlotsBuffer* next_buffer = buffer->next();
- DeallocateBuffer(buffer);
- buffer = next_buffer;
- }
- *buffer_address = NULL;
-}
} // namespace internal
} // namespace v8
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