[heap] Add debug code for investigating store buffer crasher.

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"
@@ skipping 83 matching lines @@
         task, v8::Platform::kShortRunningTask);
   }
 }
 
 void StoreBuffer::MoveEntriesToRememberedSet(int index) {
   if (!lazy_top_[index]) return;
   DCHECK_GE(index, 0);
   DCHECK_LT(index, kStoreBuffers);
   for (Address* current = start_[index]; current < lazy_top_[index];
        current++) {
-    DCHECK(!heap_->code_space()->Contains(*current));
+    CHECK(!heap_->code_space()->Contains(*current));
+    CHECK(heap_->old_space()->Contains(*current) ||
+          heap_->map_space()->Contains(*current) ||
+          heap_->lo_space()->ContainsSlow(*current));
     Address addr = *current;
     Page* page = Page::FromAnyPointerAddress(heap_, addr);
     if (IsDeletionAddress(addr)) {
       current++;
       Address end = *current;
       DCHECK(!IsDeletionAddress(end));
       addr = UnmarkDeletionAddress(addr);
       if (end) {
         RememberedSet<OLD_TO_NEW>::RemoveRange(page, addr, end,
                                                SlotSet::PREFREE_EMPTY_BUCKETS);
@@ skipping 19 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