Merge isolates to bleeding_edge.

src/objects.h

Index: src/objects.h
===================================================================
--- src/objects.h	(revision 7267)
+++ src/objects.h	(working copy)
@@ -729,6 +729,7 @@
   // Oddball testing.
   INLINE(bool IsUndefined());
   INLINE(bool IsNull());
+  INLINE(bool IsTheHole());  // Shadows MaybeObject's implementation.
   INLINE(bool IsTrue());
   INLINE(bool IsFalse());
   inline bool IsArgumentsMarker();
@@ -885,7 +886,7 @@
   enum Type {
     RETRY_AFTER_GC = 0,
     EXCEPTION = 1,       // Returning this marker tells the real exception
-                         // is in Top::pending_exception.
+                         // is in Isolate::pending_exception.
     INTERNAL_ERROR = 2,
     OUT_OF_MEMORY_EXCEPTION = 3
   };
@@ -1073,6 +1074,14 @@
   inline MapWord map_word();
   inline void set_map_word(MapWord map_word);
 
+  // The Heap the object was allocated in. Used also to access Isolate.
+  // This method can not be used during GC, it ASSERTs this.
+  inline Heap* GetHeap();
+  // Convenience method to get current isolate. This method can be
+  // accessed only when its result is the same as
+  // Isolate::Current(), it ASSERTs this. See also comment for GetHeap.
+  inline Isolate* GetIsolate();
+
   // Converts an address to a HeapObject pointer.
   static inline HeapObject* FromAddress(Address address);
 
@@ -1892,13 +1901,18 @@
 
   // Setters for frequently used oddballs located in old space.
   inline void set_undefined(int index);
+  // TODO(isolates): duplicate.
+  inline void set_undefined(Heap* heap, int index);
   inline void set_null(int index);
+  // TODO(isolates): duplicate.
+  inline void set_null(Heap* heap, int index);
   inline void set_the_hole(int index);
 
   // Setters with less debug checks for the GC to use.
   inline void set_unchecked(int index, Smi* value);
-  inline void set_null_unchecked(int index);
-  inline void set_unchecked(int index, Object* value, WriteBarrierMode mode);
+  inline void set_null_unchecked(Heap* heap, int index);
+  inline void set_unchecked(Heap* heap, int index, Object* value,
+                            WriteBarrierMode mode);
 
   // Gives access to raw memory which stores the array's data.
   inline Object** data_start();
@@ -1993,7 +2007,9 @@
 
   // Returns the number of descriptors in the array.
   int number_of_descriptors() {
-    return IsEmpty() ? 0 : length() - kFirstIndex;
+    ASSERT(length() > kFirstIndex || IsEmpty());
+    int len = length();
+    return len <= kFirstIndex ? 0 : len - kFirstIndex;
   }
 
   int NextEnumerationIndex() {
@@ -2285,7 +2301,8 @@
       (FixedArray::kMaxLength - kElementsStartOffset) / kEntrySize;
 
   // Find entry for key otherwise return kNotFound.
-  int FindEntry(Key key);
+  inline int FindEntry(Key key);
+  int FindEntry(Isolate* isolate, Key key);
 
  protected:
 
@@ -2357,16 +2374,16 @@
 
 class SymbolTableShape {
  public:
-  static bool IsMatch(HashTableKey* key, Object* value) {
+  static inline bool IsMatch(HashTableKey* key, Object* value) {
     return key->IsMatch(value);
   }
-  static uint32_t Hash(HashTableKey* key) {
+  static inline uint32_t Hash(HashTableKey* key) {
     return key->Hash();
   }
-  static uint32_t HashForObject(HashTableKey* key, Object* object) {
+  static inline uint32_t HashForObject(HashTableKey* key, Object* object) {
     return key->HashForObject(object);
   }
-  MUST_USE_RESULT static MaybeObject* AsObject(HashTableKey* key) {
+  MUST_USE_RESULT static inline MaybeObject* AsObject(HashTableKey* key) {
     return key->AsObject();
   }
 
@@ -2409,18 +2426,18 @@
 
 class MapCacheShape {
  public:
-  static bool IsMatch(HashTableKey* key, Object* value) {
+  static inline bool IsMatch(HashTableKey* key, Object* value) {
     return key->IsMatch(value);
   }
-  static uint32_t Hash(HashTableKey* key) {
+  static inline uint32_t Hash(HashTableKey* key) {
     return key->Hash();
   }
 
-  static uint32_t HashForObject(HashTableKey* key, Object* object) {
+  static inline uint32_t HashForObject(HashTableKey* key, Object* object) {
     return key->HashForObject(object);
   }
 
-  MUST_USE_RESULT static MaybeObject* AsObject(HashTableKey* key) {
+  MUST_USE_RESULT static inline MaybeObject* AsObject(HashTableKey* key) {
     return key->AsObject();
   }
 
@@ -3430,7 +3447,7 @@
   inline void CodeIterateBody(ObjectVisitor* v);
 
   template<typename StaticVisitor>
-  inline void CodeIterateBody();
+  inline void CodeIterateBody(Heap* heap);
 #ifdef OBJECT_PRINT
   inline void CodePrint() {
     CodePrint(stdout);
@@ -3718,7 +3735,7 @@
   // Code cache operations.
 
   // Clears the code cache.
-  inline void ClearCodeCache();
+  inline void ClearCodeCache(Heap* heap);
 
   // Update code cache.
   MUST_USE_RESULT MaybeObject* UpdateCodeCache(String* name, Code* code);
@@ -3742,7 +3759,7 @@
   // Also, restore the original prototype on the targets of these
   // transitions, so that we do not process this map again while
   // following back pointers.
-  void ClearNonLiveTransitions(Object* real_prototype);
+  void ClearNonLiveTransitions(Heap* heap, Object* real_prototype);
 
   // Dispatched behavior.
 #ifdef OBJECT_PRINT
@@ -3759,6 +3776,9 @@
   inline int visitor_id();
   inline void set_visitor_id(int visitor_id);
 
+  // Returns the heap this map belongs to.
+  inline Heap* heap();
+
   typedef void (*TraverseCallback)(Map* map, void* data);
 
   void TraverseTransitionTree(TraverseCallback callback, void* data);
@@ -5804,11 +5824,8 @@
 // iterating or updating after gc.
 class Relocatable BASE_EMBEDDED {
  public:
-  inline Relocatable() : prev_(top_) { top_ = this; }
-  virtual ~Relocatable() {
-    ASSERT_EQ(top_, this);
-    top_ = prev_;
-  }
+  explicit inline Relocatable(Isolate* isolate);
+  inline virtual ~Relocatable();
   virtual void IterateInstance(ObjectVisitor* v) { }
   virtual void PostGarbageCollection() { }
 
@@ -5820,7 +5837,7 @@
   static void Iterate(ObjectVisitor* v, Relocatable* top);
   static char* Iterate(ObjectVisitor* v, char* t);
  private:
-  static Relocatable* top_;
+  Isolate* isolate_;
   Relocatable* prev_;
 };
 
@@ -5830,8 +5847,8 @@
 // must be valid as long as the reader is being used.
 class FlatStringReader : public Relocatable {
  public:
-  explicit FlatStringReader(Handle<String> str);
-  explicit FlatStringReader(Vector<const char> input);
+  FlatStringReader(Isolate* isolate, Handle<String> str);
+  FlatStringReader(Isolate* isolate, Vector<const char> input);
   void PostGarbageCollection();
   inline uc32 Get(int index);
   int length() { return length_; }
@@ -5894,6 +5911,9 @@
   // [to_number]: Cached to_number computed at startup.
   DECL_ACCESSORS(to_number, Object)
 
+  inline byte kind();
+  inline void set_kind(byte kind);
+
   // Casting.
   static inline Oddball* cast(Object* obj);
 
@@ -5904,13 +5924,24 @@
 
   // Initialize the fields.
   MUST_USE_RESULT MaybeObject* Initialize(const char* to_string,
-                                          Object* to_number);
+                                          Object* to_number,
+                                          byte kind);
 
   // Layout description.
   static const int kToStringOffset = HeapObject::kHeaderSize;
   static const int kToNumberOffset = kToStringOffset + kPointerSize;
-  static const int kSize = kToNumberOffset + kPointerSize;
+  static const int kKindOffset = kToNumberOffset + kPointerSize;
+  static const int kSize = kKindOffset + kPointerSize;
 
+  static const byte kFalse = 0;
+  static const byte kTrue = 1;
+  static const byte kNotBooleanMask = ~1;
+  static const byte kTheHole = 2;
+  static const byte kNull = 3;
+  static const byte kArgumentMarker = 4;
+  static const byte kUndefined = 5;
+  static const byte kOther = 6;
+
   typedef FixedBodyDescriptor<kToStringOffset,
                               kToNumberOffset + kPointerSize,
                               kSize> BodyDescriptor;