188       region_space_(nullptr),  in Heap()
355     region_space_ = space::RegionSpace::Create("Region space", capacity_ * 2, request_begin);  in Heap()
356     AddSpace(region_space_);  in Heap()
810     DCHECK(region_space_ == nullptr);  in VisitObjects()
827   if (region_space_ != nullptr) {  in VisitObjectsInternalRegionSpace()
836     region_space_->Walk(callback, arg);  in VisitObjectsInternalRegionSpace()
1156       space = region_space_;  in ThrowOutOfMemoryError()
1269   if (region_space_ != nullptr) {  in TrimSpaces()
1270     total_alloc_space_allocated -= region_space_->GetBytesAllocated();  in TrimSpaces()
1344   if (region_space_ != nullptr && region_space_->HasAddress(obj)) {  in IsLiveObjectLocked()
2222         zygote_collector.SetFromSpace(region_space_);  in PreZygoteFork()
2249         region_space_->GetMemMap()->Protect(PROT_READ | PROT_WRITE);  in PreZygoteFork()
2437         concurrent_copying_collector_->SetRegionSpace(region_space_);  in CollectGarbageInternal()
3548   if (region_space_ != nullptr) {  in RevokeThreadLocalBuffers()
3549     CHECK_EQ(region_space_->RevokeThreadLocalBuffers(thread), 0U);  in RevokeThreadLocalBuffers()
3574   if (region_space_ != nullptr) {  in RevokeAllThreadLocalBuffers()
3575     CHECK_EQ(region_space_->RevokeAllThreadLocalBuffers(), 0U);  in RevokeAllThreadLocalBuffers()