[heap] Pause black allocation during GCs

src/heap/heap-inl.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_HEAP_HEAP_INL_H_
 #define V8_HEAP_HEAP_INL_H_
 
 #include <cmath>
 
 #include "src/base/platform/platform.h"
@@ skipping 20 matching lines @@
 AllocationSpace AllocationResult::RetrySpace() {
   DCHECK(IsRetry());
   return static_cast<AllocationSpace>(Smi::cast(object_)->value());
 }
 
 HeapObject* AllocationResult::ToObjectChecked() {
   CHECK(!IsRetry());
   return HeapObject::cast(object_);
 }
 
-void PromotionQueue::insert(HeapObject* target, int32_t size,
-                            bool was_marked_black) {
+void PromotionQueue::insert(HeapObject* target, int32_t size) {
   if (emergency_stack_ != NULL) {
-    emergency_stack_->Add(Entry(target, size, was_marked_black));
+    emergency_stack_->Add(Entry(target, size));
     return;
   }
 
   if ((rear_ - 1) < limit_) {
     RelocateQueueHead();
-    emergency_stack_->Add(Entry(target, size, was_marked_black));
+    emergency_stack_->Add(Entry(target, size));
     return;
   }
 
   struct Entry* entry = reinterpret_cast<struct Entry*>(--rear_);
   entry->obj_ = target;
   entry->size_ = size;
-  entry->was_marked_black_ = was_marked_black;
 
 // Assert no overflow into live objects.
 #ifdef DEBUG
   SemiSpace::AssertValidRange(target->GetIsolate()->heap()->new_space()->top(),
                               reinterpret_cast<Address>(rear_));
 #endif
 }
 
-void PromotionQueue::remove(HeapObject** target, int32_t* size,
-                            bool* was_marked_black) {
+void PromotionQueue::remove(HeapObject** target, int32_t* size) {
   DCHECK(!is_empty());
   if (front_ == rear_) {
     Entry e = emergency_stack_->RemoveLast();
     *target = e.obj_;
     *size = e.size_;
-    *was_marked_black = e.was_marked_black_;
     return;
   }
 
   struct Entry* entry = reinterpret_cast<struct Entry*>(--front_);
   *target = entry->obj_;
   *size = entry->size_;
-  *was_marked_black = entry->was_marked_black_;
 
   // Assert no underflow.
   SemiSpace::AssertValidRange(reinterpret_cast<Address>(rear_),
                               reinterpret_cast<Address>(front_));
 }
 
 Page* PromotionQueue::GetHeadPage() {
   return Page::FromAllocationAreaAddress(reinterpret_cast<Address>(rear_));
 }
 
@@ skipping 791 matching lines @@
 void VerifySmisVisitor::VisitRootPointers(Root root, Object** start,
                                           Object** end) {
   for (Object** current = start; current < end; current++) {
     CHECK((*current)->IsSmi());
   }
 }
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_HEAP_HEAP_INL_H_