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

src/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/store-buffer.h"
 
 #include <algorithm>
 
 #include "src/v8.h"
 
 #include "src/base/atomicops.h"
 #include "src/counters.h"
 #include "src/store-buffer-inl.h"
+#include "src/utils.h"
 
 namespace v8 {
 namespace internal {
 
 StoreBuffer::StoreBuffer(Heap* heap)
     : heap_(heap),
       start_(NULL),
       limit_(NULL),
       old_start_(NULL),
       old_limit_(NULL),
@@ skipping 20 matching lines @@
   uintptr_t start_as_int =
       reinterpret_cast<uintptr_t>(virtual_memory_->address());
   start_ =
       reinterpret_cast<Address*>(RoundUp(start_as_int, kStoreBufferSize * 2));
   limit_ = start_ + (kStoreBufferSize / kPointerSize);
 
   // We set the maximum store buffer size to the maximum size of a semi-space.
   // 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);
   old_top_ = old_start_ =
       reinterpret_cast<Address*>(old_virtual_memory_->address());
   // Don't know the alignment requirements of the OS, but it is certainly not
   // less than 0xfff.
   ASSERT((reinterpret_cast<uintptr_t>(old_start_) & 0xfff) == 0);
   int initial_length =
       static_cast<int>(base::OS::CommitPageSize() / kPointerSize);
@@ skipping 528 matching lines @@
     }
     old_buffer_is_sorted_ = false;
     old_buffer_is_filtered_ = false;
     *old_top_++ = reinterpret_cast<Address>(int_addr << kPointerSizeLog2);
     ASSERT(old_top_ <= old_limit_);
   }
   heap_->isolate()->counters()->store_buffer_compactions()->Increment();
 }
 
 } }  // namespace v8::internal