Line data    Source code

       1             : // Copyright 2017 the V8 project authors. All rights reserved.
       2             : // Use of this source code is governed by a BSD-style license that can be
       3             : // found in the LICENSE file.
       4             : 
       5             : #include "src/heap/invalidated-slots.h"
       6             : #include "src/heap/spaces.h"
       7             : 
       8             : namespace v8 {
       9             : namespace internal {
      10             : 
      11       19470 : InvalidatedSlotsFilter::InvalidatedSlotsFilter(MemoryChunk* chunk) {
      12             :   DCHECK_IMPLIES(chunk->invalidated_slots() != nullptr,
      13             :                  chunk->owner()->identity() == OLD_SPACE);
      14             :   InvalidatedSlots* invalidated_slots =
      15        6490 :       chunk->invalidated_slots() ? chunk->invalidated_slots() : &empty_;
      16        6490 :   iterator_ = invalidated_slots->begin();
      17        6490 :   iterator_end_ = invalidated_slots->end();
      18        6490 :   sentinel_ = chunk->area_end();
      19        6490 :   if (iterator_ != iterator_end_) {
      20         170 :     invalidated_start_ = iterator_->first->address();
      21         170 :     invalidated_end_ = invalidated_start_ + iterator_->second;
      22             :   } else {
      23        6320 :     invalidated_start_ = sentinel_;
      24        6320 :     invalidated_end_ = sentinel_;
      25             :   }
      26             :   // These values will be lazily set when needed.
      27        6490 :   invalidated_object_ = nullptr;
      28        6490 :   invalidated_object_size_ = 0;
      29             : #ifdef DEBUG
      30             :   last_slot_ = chunk->area_start();
      31             : #endif
      32        6490 : }
      33             : 
      34             : }  // namespace internal
      35             : }  // namespace v8