[Isolates] Merge from bleeding_edge to isolates, revisions 6100-6300.

src/objects.h

 // Copyright 2010 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 692 matching lines @@
 #define DECLARE_STRUCT_PREDICATE(NAME, Name, name) inline bool Is##Name();
   STRUCT_LIST(DECLARE_STRUCT_PREDICATE)
 #undef DECLARE_STRUCT_PREDICATE
 
   // Oddball testing.
   INLINE(bool IsUndefined());
   INLINE(bool IsNull());
   INLINE(bool IsTheHole());  // Shadows MaybeObject's implementation.
   INLINE(bool IsTrue());
   INLINE(bool IsFalse());
+  inline bool IsArgumentsMarker();
 
   // Extract the number.
   inline double Number();
 
   inline bool HasSpecificClassOf(String* name);
 
   MUST_USE_RESULT MaybeObject* ToObject();             // ECMA-262 9.9.
   Object* ToBoolean();                                 // ECMA-262 9.2.
 
   // Convert to a JSObject if needed.
@@ skipping 620 matching lines @@
   MUST_USE_RESULT MaybeObject* SetProperty(String* key,
                                            Object* value,
                                            PropertyAttributes attributes);
   MUST_USE_RESULT MaybeObject* SetProperty(LookupResult* result,
                                            String* key,
                                            Object* value,
                                            PropertyAttributes attributes);
   MUST_USE_RESULT MaybeObject* SetPropertyWithFailedAccessCheck(
       LookupResult* result,
       String* name,
-      Object* value);
+      Object* value,
+      bool check_prototype);
   MUST_USE_RESULT MaybeObject* SetPropertyWithCallback(Object* structure,
                                                        String* name,
                                                        Object* value,
                                                        JSObject* holder);
   MUST_USE_RESULT MaybeObject* SetPropertyWithDefinedSetter(JSFunction* setter,
                                                             Object* value);
   MUST_USE_RESULT MaybeObject* SetPropertyWithInterceptor(
       String* name,
       Object* value,
       PropertyAttributes attributes);
   MUST_USE_RESULT MaybeObject* SetPropertyPostInterceptor(
       String* name,
       Object* value,
       PropertyAttributes attributes);
-  MUST_USE_RESULT MaybeObject* IgnoreAttributesAndSetLocalProperty(
+  MUST_USE_RESULT MaybeObject* SetLocalPropertyIgnoreAttributes(
       String* key,
       Object* value,
       PropertyAttributes attributes);
 
   // Retrieve a value in a normalized object given a lookup result.
   // Handles the special representation of JS global objects.
   Object* GetNormalizedProperty(LookupResult* result);
 
   // Sets the property value in a normalized object given a lookup result.
   // Handles the special representation of JS global objects.
@@ skipping 128 matching lines @@
 
     // Element with given index is stored in slow backing store.
     DICTIONARY_ELEMENT
   };
 
   LocalElementType HasLocalElement(uint32_t index);
 
   bool HasElementWithInterceptor(JSObject* receiver, uint32_t index);
   bool HasElementPostInterceptor(JSObject* receiver, uint32_t index);
 
-  MUST_USE_RESULT MaybeObject* SetFastElement(uint32_t index, Object* value);
+  MUST_USE_RESULT MaybeObject* SetFastElement(uint32_t index,
+                                              Object* value,
+                                              bool check_prototype = true);
 
   // Set the index'th array element.
   // A Failure object is returned if GC is needed.
-  MUST_USE_RESULT MaybeObject* SetElement(uint32_t index, Object* value);
+  MUST_USE_RESULT MaybeObject* SetElement(uint32_t index,
+                                          Object* value,
+                                          bool check_prototype = true);
 
   // Returns the index'th element.
   // The undefined object if index is out of bounds.
   MaybeObject* GetElementWithReceiver(JSObject* receiver, uint32_t index);
   MaybeObject* GetElementWithInterceptor(JSObject* receiver, uint32_t index);
 
   MUST_USE_RESULT MaybeObject* SetFastElementsCapacityAndLength(int capacity,
                                                                 int length);
   MUST_USE_RESULT MaybeObject* SetSlowElements(Object* length);
 
@@ skipping 233 matching lines @@
  private:
   MUST_USE_RESULT MaybeObject* GetElementWithCallback(Object* receiver,
                                                       Object* structure,
                                                       uint32_t index,
                                                       Object* holder);
   MaybeObject* SetElementWithCallback(Object* structure,
                                       uint32_t index,
                                       Object* value,
                                       JSObject* holder);
   MUST_USE_RESULT MaybeObject* SetElementWithInterceptor(uint32_t index,
-                                                         Object* value);
-  MUST_USE_RESULT MaybeObject* SetElementWithoutInterceptor(uint32_t index,
-                                                            Object* value);
+                                                         Object* value,
+                                                         bool check_prototype);
+  MUST_USE_RESULT MaybeObject* SetElementWithoutInterceptor(
+      uint32_t index,
+      Object* value,
+      bool check_prototype);
 
   MaybeObject* GetElementPostInterceptor(JSObject* receiver, uint32_t index);
 
   MUST_USE_RESULT MaybeObject* DeletePropertyPostInterceptor(String* name,
                                                              DeleteMode mode);
   MUST_USE_RESULT MaybeObject* DeletePropertyWithInterceptor(String* name);
 
   MUST_USE_RESULT MaybeObject* DeleteElementPostInterceptor(uint32_t index,
                                                             DeleteMode mode);
   MUST_USE_RESULT MaybeObject* DeleteElementWithInterceptor(uint32_t index);
@@ skipping 549 matching lines @@
 //
 // No special elements in the prefix and the element size is 1
 // because only the symbol itself (the key) needs to be stored.
 class SymbolTable: public HashTable<SymbolTableShape, HashTableKey*> {
  public:
   // Find symbol in the symbol table.  If it is not there yet, it is
   // added.  The return value is the symbol table which might have
   // been enlarged.  If the return value is not a failure, the symbol
   // pointer *s is set to the symbol found.
   MUST_USE_RESULT MaybeObject* LookupSymbol(Vector<const char> str, Object** s);
+  MUST_USE_RESULT MaybeObject* LookupAsciiSymbol(Vector<const char> str,
+                                                 Object** s);
+  MUST_USE_RESULT MaybeObject* LookupTwoByteSymbol(Vector<const uc16> str,
+                                                   Object** s);
   MUST_USE_RESULT MaybeObject* LookupString(String* key, Object** s);
 
   // Looks up a symbol that is equal to the given string and returns
   // true if it is found, assigning the symbol to the given output
   // parameter.
   bool LookupSymbolIfExists(String* str, String** symbol);
   bool LookupTwoCharsSymbolIfExists(uint32_t c1, uint32_t c2, String** symbol);
 
   // Casting.
   static inline SymbolTable* cast(Object* obj);
@@ skipping 761 matching lines @@
 
   // Casting.
   static inline DeoptimizationOutputData* cast(Object* obj);
 
 #ifdef OBJECT_PRINT
   void DeoptimizationOutputDataPrint(FILE* out);
 #endif
 };
 
 
+class SafepointEntry;
+
+
 // Code describes objects with on-the-fly generated machine code.
 class Code: public HeapObject {
  public:
   // Opaque data type for encapsulating code flags like kind, inline
   // cache state, and arguments count.
   // FLAGS_MIN_VALUE and FLAGS_MAX_VALUE are specified to ensure that
   // enumeration type has correct value range (see Issue 830 for more details).
   enum Flags {
     FLAGS_MIN_VALUE = kMinInt,
     FLAGS_MAX_VALUE = kMaxInt
@@ skipping 127 matching lines @@
   inline byte type_recording_binary_op_type();
   inline void set_type_recording_binary_op_type(byte value);
   inline byte type_recording_binary_op_result_type();
   inline void set_type_recording_binary_op_result_type(byte value);
 
   // [compare state]: For kind compare IC stubs, tells what state the
   // stub is in.
   inline byte compare_state();
   inline void set_compare_state(byte value);
 
-  // Get the safepoint entry for the given pc. Returns NULL for
-  // non-safepoint pcs.
-  uint8_t* GetSafepointEntry(Address pc);
+  // Get the safepoint entry for the given pc.
+  SafepointEntry GetSafepointEntry(Address pc);
 
   // Mark this code object as not having a stack check table.  Assumes kind
   // is FUNCTION.
   void SetNoStackCheckTable();
 
   // Find the first map in an IC stub.
   Map* FindFirstMap();
 
   // Flags operations.
   static inline Flags ComputeFlags(Kind kind,
@@ skipping 1799 matching lines @@
   bool MarkAsUndetectable();
 
   // Return a substring.
   MUST_USE_RESULT MaybeObject* SubString(int from,
                                          int to,
                                          PretenureFlag pretenure = NOT_TENURED);
 
   // String equality operations.
   inline bool Equals(String* other);
   bool IsEqualTo(Vector<const char> str);
+  bool IsAsciiEqualTo(Vector<const char> str);
+  bool IsTwoByteEqualTo(Vector<const uc16> str);
 
   // Return a UTF8 representation of the string.  The string is null
   // terminated but may optionally contain nulls.  Length is returned
   // in length_output if length_output is not a null pointer  The string
   // should be nearly flat, otherwise the performance of this method may
   // be very slow (quadratic in the length).  Setting robustness_flag to
   // ROBUST_STRING_TRAVERSAL invokes behaviour that is robust  This means it
   // handles unexpected data without causing assert failures and it does not
   // do any heap allocations.  This is useful when printing stack traces.
   SmartPointer<char> ToCString(AllowNullsFlag allow_nulls,
@@ skipping 151 matching lines @@
                                         unsigned* remaining,
                                         unsigned* offset);
 
   // Helper function for flattening strings.
   template <typename sinkchar>
   static void WriteToFlat(String* source,
                           sinkchar* sink,
                           int from,
                           int to);
 
+  static inline bool IsAscii(const char* chars, int length) {
+    const char* limit = chars + length;
+#ifdef V8_HOST_CAN_READ_UNALIGNED
+    ASSERT(kMaxAsciiCharCode == 0x7F);
+    const uintptr_t non_ascii_mask = kUintptrAllBitsSet / 0xFF * 0x80;
+    while (chars <= limit - sizeof(uintptr_t)) {
+      if (*reinterpret_cast<const uintptr_t*>(chars) & non_ascii_mask) {
+        return false;
+      }
+      chars += sizeof(uintptr_t);
+    }
+#endif
+    while (chars < limit) {
+      if (static_cast<uint8_t>(*chars) > kMaxAsciiCharCodeU) return false;
+      ++chars;
+    }
+    return true;
+  }
+
+  static inline bool IsAscii(const uc16* chars, int length) {
+    const uc16* limit = chars + length;
+    while (chars < limit) {
+      if (*chars > kMaxAsciiCharCodeU) return false;
+      ++chars;
+    }
+    return true;
+  }
+
  protected:
   class ReadBlockBuffer {
    public:
     ReadBlockBuffer(unibrow::byte* util_buffer_,
                     unsigned cursor_,
                     unsigned capacity_,
                     unsigned remaining_) :
       util_buffer(util_buffer_),
       cursor(cursor_),
       capacity(capacity_),
@@ skipping 418 matching lines @@
   static const int kToStringOffset = HeapObject::kHeaderSize;
   static const int kToNumberOffset = kToStringOffset + 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 kUndefined = 4;
-  static const byte kOther = 5;
+  static const byte kArgumentMarker = 4;
+  static const byte kUndefined = 5;
+  static const byte kOther = 6;
 
   typedef FixedBodyDescriptor<kToStringOffset,
                               kToNumberOffset + kPointerSize,
                               kSize> BodyDescriptor;
 
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(Oddball);
 };
 
 
@@ skipping 660 matching lines @@
     } else {
       value &= ~(1 << bit_position);
     }
     return value;
   }
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_H_