(early draft) Strict mode - throw exception on assignment to read only property.

src/objects-inl.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 2597 matching lines @@
                                InlineCacheState ic_state,
                                ExtraICState extra_ic_state,
                                PropertyType type,
                                int argc,
                                InlineCacheHolderFlag holder) {
   // Extra IC state is only allowed for monomorphic call IC stubs
   // or for store IC stubs.
   ASSERT(extra_ic_state == kNoExtraICState ||
          (kind == CALL_IC && (ic_state == MONOMORPHIC ||
                               ic_state == MONOMORPHIC_PROTOTYPE_FAILURE)) ||
-         (kind == STORE_IC));
+         (kind == STORE_IC) ||
+         (kind == KEYED_STORE_IC));
   // Compute the bit mask.
   int bits = kind << kFlagsKindShift;
   if (in_loop) bits |= kFlagsICInLoopMask;
   bits |= ic_state << kFlagsICStateShift;
   bits |= type << kFlagsTypeShift;
   bits |= extra_ic_state << kFlagsExtraICStateShift;
   bits |= argc << kFlagsArgumentsCountShift;
   if (holder == PROTOTYPE_MAP) bits |= kFlagsCacheInPrototypeMapMask;
   // Cast to flags and validate result before returning it.
   Flags result = static_cast<Flags>(bits);
@@ skipping 1101 matching lines @@
                                       Heap::hidden_symbol(),
                                       &attributes)->ToObjectUnchecked();
   return result;
 }
 
 
 MaybeObject* JSObject::SetHiddenPropertiesObject(Object* hidden_obj) {
   ASSERT(!IsJSGlobalProxy());
   return SetPropertyPostInterceptor(Heap::hidden_symbol(),
                                     hidden_obj,
-                                    DONT_ENUM);
+                                    DONT_ENUM,
+                                    kNonStrictMode);
 }
 
 
 bool JSObject::HasElement(uint32_t index) {
   return HasElementWithReceiver(this, index);
 }
 
 
 bool AccessorInfo::all_can_read() {
   return BooleanBit::get(flag(), kAllCanReadBit);
@@ skipping 180 matching lines @@
 #undef WRITE_INT_FIELD
 #undef READ_SHORT_FIELD
 #undef WRITE_SHORT_FIELD
 #undef READ_BYTE_FIELD
 #undef WRITE_BYTE_FIELD
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_INL_H_