Ensure integrity of ASCII strings.

src/objects.h

 // 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 7224 matching lines @@
   static const int kMaxLength = (kMaxSize - kHeaderSize);
 
   // Support for StringInputBuffer.
   inline void SeqAsciiStringReadBlockIntoBuffer(ReadBlockBuffer* buffer,
                                                 unsigned* offset,
                                                 unsigned chars);
   inline const unibrow::byte* SeqAsciiStringReadBlock(unsigned* remaining,
                                                       unsigned* offset,
                                                       unsigned chars);
 
+#ifdef DEBUG
+  void SeqAsciiStringVerify();
+#endif
+
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(SeqAsciiString);
 };
 
 
 // The TwoByteString class captures sequential unicode string objects.
 // Each character in the TwoByteString is a two-byte uint16_t.
 class SeqTwoByteString: public SeqString {
  public:
   static const bool kHasAsciiEncoding = false;
@@ skipping 1392 matching lines @@
     } else {
       value &= ~(1 << bit_position);
     }
     return value;
   }
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_H_