Check whether the marking deque overflowed in ProcessEphemeralMarking

src/heap/mark-compact.cc

 // 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.
 
 #include "src/v8.h"
 
 #include "src/base/atomicops.h"
 #include "src/base/bits.h"
 #include "src/code-stubs.h"
 #include "src/compilation-cache.h"
@@ skipping 2223 matching lines @@
     // are marked. Objects pointed to only by weak global handles cannot be
     // immediately reclaimed. Instead, we have to mark them as pending and mark
     // objects reachable from them.
     //
     // First we identify nonlive weak handles and mark them as pending
     // destruction.
     heap()->isolate()->global_handles()->IdentifyWeakHandles(
         &IsUnmarkedHeapObject);
     // Then we mark the objects.
     heap()->isolate()->global_handles()->IterateWeakRoots(&root_visitor);
+    ProcessMarkingDeque();
 
     // Repeat Harmony weak maps marking to mark unmarked objects reachable from
     // the weak roots we just marked as pending destruction.
     //
     // We only process harmony collections, as all object groups have been fully
     // processed and no weakly reachable node can discover new objects groups.
     ProcessEphemeralMarking(&root_visitor, true);
   }
 
   AfterMarking();
@@ skipping 2185 matching lines @@
   SlotsBuffer* buffer = *buffer_address;
   while (buffer != NULL) {
     SlotsBuffer* next_buffer = buffer->next();
     DeallocateBuffer(buffer);
     buffer = next_buffer;
   }
   *buffer_address = NULL;
 }
 }
 }  // namespace v8::internal