[heap] Ensure consistency between store buffer mode and moving all entries to remembered set.

src/heap/store-buffer.cc

 // Copyright 2011 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.
 
 #include "src/heap/store-buffer.h"
 
 #include <algorithm>
 
 #include "src/counters.h"
 #include "src/heap/incremental-marking.h"
 #include "src/isolate.h"
 #include "src/objects-inl.h"
 #include "src/v8.h"
 
 namespace v8 {
 namespace internal {
 
 StoreBuffer::StoreBuffer(Heap* heap)
-    : heap_(heap), top_(nullptr), current_(0), virtual_memory_(nullptr) {
+    : heap_(heap),
+      top_(nullptr),
+      current_(0),
+      mode_(NOT_IN_GC),
+      virtual_memory_(nullptr) {
   for (int i = 0; i < kStoreBuffers; i++) {
     start_[i] = nullptr;
     limit_[i] = nullptr;
     lazy_top_[i] = nullptr;
   }
   task_running_ = false;
   insertion_callback = &InsertDuringRuntime;
   deletion_callback = &DeleteDuringRuntime;
 }
 
@@ skipping 107 matching lines @@
 
 void StoreBuffer::ConcurrentlyProcessStoreBuffer() {
   base::LockGuard<base::Mutex> guard(&mutex_);
   int other = (current_ + 1) % kStoreBuffers;
   MoveEntriesToRememberedSet(other);
   task_running_ = false;
 }
 
 }  // namespace internal
 }  // namespace v8