[stubs] Extend HasProperty stub with dictionary-mode and double-elements objects support.

src/objects.h

 // Copyright 2015 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.
 
 #ifndef V8_OBJECTS_H_
 #define V8_OBJECTS_H_
 
 #include <iosfwd>
 
 #include "src/assert-scope.h"
@@ skipping 3168 matching lines @@
   inline static uint32_t NextProbe(
       uint32_t last, uint32_t number, uint32_t size) {
     return (last + number) & (size - 1);
   }
 };
 
 
 template <typename Derived, typename Shape, typename Key>
 class HashTable : public HashTableBase {
  public:
+  typedef Shape ShapeT;
+
   // Wrapper methods
   inline uint32_t Hash(Key key) {
     if (Shape::UsesSeed) {
       return Shape::SeededHash(key, GetHeap()->HashSeed());
     } else {
       return Shape::Hash(key);
     }
   }
 
   inline uint32_t HashForObject(Key key, Object* object) {
@@ skipping 266 matching lines @@
       int at_least_space_for,
       PretenureFlag pretenure = NOT_TENURED);
 
   // Ensures that a new dictionary is created when the capacity is checked.
   void SetRequiresCopyOnCapacityChange();
 
   // Ensure enough space for n additional elements.
   static Handle<Derived> EnsureCapacity(Handle<Derived> obj, int n, Key key);
 
 #ifdef OBJECT_PRINT
+  // For our gdb macros, we should perhaps change these in the future.
+  void Print();
+
   void Print(std::ostream& os);  // NOLINT
 #endif
   // Returns the key (slow).
   Object* SlowReverseLookup(Object* value);
 
   // Sets the entry to (key, value) pair.
   inline void SetEntry(int entry,
                        Handle<Object> key,
                        Handle<Object> value);
   inline void SetEntry(int entry,
@@ skipping 5059 matching lines @@
   // Shift constant retrieving hash code from hash field.
   static const int kHashShift = kNofHashBitFields;
 
   // Only these bits are relevant in the hash, since the top two are shifted
   // out.
   static const uint32_t kHashBitMask = 0xffffffffu >> kHashShift;
 
   // Array index strings this short can keep their index in the hash field.
   static const int kMaxCachedArrayIndexLength = 7;
 
+  // Maximum number of characters to consider when trying to convert a string
+  // value into an array index.
+  static const int kMaxArrayIndexSize = 10;
+
   // For strings which are array indexes the hash value has the string length
   // mixed into the hash, mainly to avoid a hash value of zero which would be
   // the case for the string '0'. 24 bits are used for the array index value.
   static const int kArrayIndexValueBits = 24;
   static const int kArrayIndexLengthBits =
       kBitsPerInt - kArrayIndexValueBits - kNofHashBitFields;
 
-  STATIC_ASSERT((kArrayIndexLengthBits > 0));
+  STATIC_ASSERT(kArrayIndexLengthBits > 0);
+  STATIC_ASSERT(kMaxArrayIndexSize < (1 << kArrayIndexLengthBits));
 
   class ArrayIndexValueBits : public BitField<unsigned int, kNofHashBitFields,
       kArrayIndexValueBits> {};  // NOLINT
   class ArrayIndexLengthBits : public BitField<unsigned int,
       kNofHashBitFields + kArrayIndexValueBits,
       kArrayIndexLengthBits> {};  // NOLINT
 
   // Check that kMaxCachedArrayIndexLength + 1 is a power of two so we
   // could use a mask to test if the length of string is less than or equal to
   // kMaxCachedArrayIndexLength.
@@ skipping 69 matching lines @@
 // Ecma-262:
 //  4.3.16 String Value
 //    A string value is a member of the type String and is a finite
 //    ordered sequence of zero or more 16-bit unsigned integer values.
 //
 // All string values have a length field.
 class String: public Name {
  public:
   enum Encoding { ONE_BYTE_ENCODING, TWO_BYTE_ENCODING };
 
-  // Array index strings this short can keep their index in the hash field.
-  static const int kMaxCachedArrayIndexLength = 7;
-
-  // For strings which are array indexes the hash value has the string length
-  // mixed into the hash, mainly to avoid a hash value of zero which would be
-  // the case for the string '0'. 24 bits are used for the array index value.
-  static const int kArrayIndexValueBits = 24;
-  static const int kArrayIndexLengthBits =
-      kBitsPerInt - kArrayIndexValueBits - kNofHashBitFields;
-
-  STATIC_ASSERT((kArrayIndexLengthBits > 0));
-
-  class ArrayIndexValueBits : public BitField<unsigned int, kNofHashBitFields,
-      kArrayIndexValueBits> {};  // NOLINT
-  class ArrayIndexLengthBits : public BitField<unsigned int,
-      kNofHashBitFields + kArrayIndexValueBits,
-      kArrayIndexLengthBits> {};  // NOLINT
-
-  // Check that kMaxCachedArrayIndexLength + 1 is a power of two so we
-  // could use a mask to test if the length of string is less than or equal to
-  // kMaxCachedArrayIndexLength.
-  STATIC_ASSERT(IS_POWER_OF_TWO(kMaxCachedArrayIndexLength + 1));
-
-  static const unsigned int kContainsCachedArrayIndexMask =
-      (~static_cast<unsigned>(kMaxCachedArrayIndexLength)
-       << ArrayIndexLengthBits::kShift) |
-      kIsNotArrayIndexMask;
-
   class SubStringRange {
    public:
     explicit inline SubStringRange(String* string, int first = 0,
                                    int length = -1);
     class iterator;
     inline iterator begin();
     inline iterator end();
 
    private:
     String* string_;
@@ skipping 191 matching lines @@
 #endif
   DECLARE_PRINTER(String)
   DECLARE_VERIFIER(String)
 
   inline bool IsFlat();
 
   // Layout description.
   static const int kLengthOffset = Name::kSize;
   static const int kSize = kLengthOffset + kPointerSize;
 
-  // Maximum number of characters to consider when trying to convert a string
-  // value into an array index.
-  static const int kMaxArrayIndexSize = 10;
-  STATIC_ASSERT(kMaxArrayIndexSize < (1 << kArrayIndexLengthBits));
-
   // Max char codes.
   static const int32_t kMaxOneByteCharCode = unibrow::Latin1::kMaxChar;
   static const uint32_t kMaxOneByteCharCodeU = unibrow::Latin1::kMaxChar;
   static const int kMaxUtf16CodeUnit = 0xffff;
   static const uint32_t kMaxUtf16CodeUnitU = kMaxUtf16CodeUnit;
   static const uc32 kMaxCodePoint = 0x10ffff;
 
   // Maximal string length.
   static const int kMaxLength = (1 << 28) - 16;
 
@@ skipping 1885 matching lines @@
     }
     return value;
   }
 };
 
 
 }  // NOLINT, false-positive due to second-order macros.
 }  // NOLINT, false-positive due to second-order macros.
 
 #endif  // V8_OBJECTS_H_