Do not update survival rate if the new space size is zero.

src/heap.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 889 matching lines @@
         Context::cast(context)->get(Context::NORMALIZED_MAP_CACHE_INDEX);
     if (!cache->IsUndefined()) {
       NormalizedMapCache::cast(cache)->Clear();
     }
     context = Context::cast(context)->get(Context::NEXT_CONTEXT_LINK);
   }
 }
 
 
 void Heap::UpdateSurvivalRateTrend(int start_new_space_size) {
+  if (start_new_space_size == 0) return;
+
   double survival_rate =
       (static_cast<double>(young_survivors_after_last_gc_) * 100) /
       start_new_space_size;
 
   if (survival_rate > kYoungSurvivalRateHighThreshold) {
     high_survival_rate_period_length_++;
   } else {
     high_survival_rate_period_length_ = 0;
   }
 
@@ skipping 7047 matching lines @@
   if (FLAG_concurrent_recompilation) {
     heap_->relocation_mutex_->Lock();
 #ifdef DEBUG
     heap_->relocation_mutex_locked_by_optimizer_thread_ =
         heap_->isolate()->optimizing_compiler_thread()->IsOptimizerThread();
 #endif  // DEBUG
   }
 }
 
 } }  // namespace v8::internal