Track allocation info

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index 0d1a69cb9882985fa282c4e2f3dc4a5fa98c9523..db5c4b7d12dcaf9e43690944fd48075ea96a300c 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -279,6 +279,7 @@ const int kStubMinorKeyBits = kBitsPerInt - kSmiTagSize - kStubMajorKeyBits;
   V(OBJECT_TEMPLATE_INFO_TYPE)                                                 \
   V(SIGNATURE_INFO_TYPE)                                                       \
   V(TYPE_SWITCH_INFO_TYPE)                                                     \
+  V(ALLOCATION_SITE_INFO_TYPE)                                                 \
   V(SCRIPT_TYPE)                                                               \
   V(CODE_CACHE_TYPE)                                                           \
   V(POLYMORPHIC_CODE_CACHE_TYPE)                                               \
@@ -432,6 +433,7 @@ const int kStubMinorKeyBits = kBitsPerInt - kSmiTagSize - kStubMajorKeyBits;
   V(SIGNATURE_INFO, SignatureInfo, signature_info)                             \
   V(TYPE_SWITCH_INFO, TypeSwitchInfo, type_switch_info)                        \
   V(SCRIPT, Script, script)                                                    \
+  V(ALLOCATION_SITE_INFO, AllocationSiteInfo, allocation_site_info)            \
   V(CODE_CACHE, CodeCache, code_cache)                                         \
   V(POLYMORPHIC_CODE_CACHE, PolymorphicCodeCache, polymorphic_code_cache)      \
   V(TYPE_FEEDBACK_INFO, TypeFeedbackInfo, type_feedback_info)                  \
@@ -587,6 +589,7 @@ enum InstanceType {
   OBJECT_TEMPLATE_INFO_TYPE,
   SIGNATURE_INFO_TYPE,
   TYPE_SWITCH_INFO_TYPE,
+  ALLOCATION_SITE_INFO_TYPE,
   SCRIPT_TYPE,
   CODE_CACHE_TYPE,
   POLYMORPHIC_CODE_CACHE_TYPE,
@@ -4156,6 +4159,11 @@ class TypeFeedbackCells: public FixedArray {
   // The object that indicates a megamorphic state.
   static inline Handle<Object> MegamorphicSentinel(Isolate* isolate);
 
+  // The object that indicates a monomorphic state of Array with a specific
+  // ElementsKind.
+  static inline Handle<Object> MonomorphicArraySentinel(
+      ElementsKind elements_kind);
+
   // A raw version of the uninitialized sentinel that's safe to read during
   // garbage collection (e.g., for patching the cache).
   static inline Object* RawUninitializedSentinel(Heap* heap);
@@ -8715,6 +8723,30 @@ class TypeSwitchInfo: public Struct {
 };
 
 
+class AllocationSiteInfo: public Struct {
+ public:
+  DECL_ACCESSORS(payload, Object)
+
+  static inline AllocationSiteInfo* cast(Object* obj);
+
+#ifdef OBJECT_PRINT
+  inline void AllocationSiteInfoPrint() {
+    AllocationSiteInfoPrint(stdout);
+  }
+  void AllocationSiteInfoPrint(FILE* out);
+#endif
+#ifdef DEBUG
+  void AllocationSiteInfoVerify();
+#endif
+
+  static const int kPayloadOffset  = HeapObject::kHeaderSize;
+  static const int kSize           = kPayloadOffset + kPointerSize;
+
+ private:
+  DISALLOW_IMPLICIT_CONSTRUCTORS(AllocationSiteInfo);
+};
+
+
 #ifdef ENABLE_DEBUGGER_SUPPORT
 // The DebugInfo class holds additional information for a function being
 // debugged.