RegExp stack and zone limits.

src/zone-inl.h

 // Copyright 2006-2008 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 30 matching lines @@
   // Check if the requested size is available without expanding.
   Address result = position_;
   if ((position_ += size) > limit_) result = NewExpand(size);
 
   // Check that the result has the proper alignment and return it.
   ASSERT(IsAddressAligned(result, kAlignment, 0));
   return reinterpret_cast<void*>(result);
 }
 
 
+bool Zone::excess_allocation() {
+  return segment_bytes_allocated_ > zone_excess_limit_;
+}
+
+
 } }  // namespace v8::internal
 
 #endif  // V8_ZONE_INL_H_