Make sure that the overflow store buffer size is always larger or equals than the regular store buf…

src/store-buffer.cc

Index: src/store-buffer.cc
diff --git a/src/store-buffer.cc b/src/store-buffer.cc
index a7575ae32822344c7c626e81daa9a122a4e614f4..0e4fd6429bce7b7a103b907b9eebcfd712b1bf96 100644
--- a/src/store-buffer.cc
+++ b/src/store-buffer.cc
@@ -11,6 +11,7 @@
 #include "src/base/atomicops.h"
 #include "src/counters.h"
 #include "src/store-buffer-inl.h"
+#include "src/utils.h"
 
 namespace v8 {
 namespace internal {
@@ -51,7 +52,9 @@ void StoreBuffer::SetUp() {
   // The store buffer may reach this limit during a full garbage collection.
   // Note that half of the semi-space should be good enough since half of the
   // memory in the semi-space are not object pointers.
-  old_store_buffer_length_ = heap_->MaxSemiSpaceSize() / sizeof(Address);
+  old_store_buffer_length_ =
+      Max(static_cast<int>(heap_->MaxSemiSpaceSize() / sizeof(Address)),
+          kOldRegularStoreBufferLength);
 
   old_virtual_memory_ =
       new base::VirtualMemory(old_store_buffer_length_ * kPointerSize);