Make sure that the overflow store buffer size is always larger or equals than...

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

BUG=
R=bmeurer@chromium.org

Review URL: https://codereview.chromium.org/372983005

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22278 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

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);