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

src/x64/stub-cache-x64.cc

Index: src/x64/stub-cache-x64.cc
diff --git a/src/x64/stub-cache-x64.cc b/src/x64/stub-cache-x64.cc
index 774de718444a3935af93004c0eb1c3c236941147..89e959f513ab5b74fb5bca53fd6aa68d3f61b9cb 100644
--- a/src/x64/stub-cache-x64.cc
+++ b/src/x64/stub-cache-x64.cc
@@ -2408,12 +2408,13 @@ MaybeObject* StoreStubCompiler::CompileStoreInterceptor(JSObject* receiver,
   __ push(rdx);  // receiver
   __ push(rcx);  // name
   __ push(rax);  // value
+  __ Push(Smi::FromInt(strict_mode_));
   __ push(rbx);  // restore return address
 
   // Do tail-call to the runtime system.
   ExternalReference store_ic_property =
       ExternalReference(IC_Utility(IC::kStoreInterceptorProperty));
-  __ TailCallExternalReference(store_ic_property, 3, 1);
+  __ TailCallExternalReference(store_ic_property, 4, 1);
 
   // Handle store cache miss.
   __ bind(&miss);
@@ -3490,10 +3491,15 @@ MaybeObject* ExternalArrayStubCompiler::CompileKeyedStoreStub(
   __ push(rdx);  // receiver
   __ push(rcx);  // key
   __ push(rax);  // value
+  __ Push(Smi::FromInt(NONE));   // PropertyAttributes
+  __ Push(Smi::FromInt(
+      Code::ExtractExtraICStateFromFlags(flags) == kStrictMode
+        ? kStrictMode
+        : kNonStrictMode));
   __ push(rbx);  // return address
 
   // Do tail-call to runtime routine.
-  __ TailCallRuntime(Runtime::kSetProperty, 3, 1);
+  __ TailCallRuntime(Runtime::kSetProperty, 5, 1);
 
   return GetCode(flags);
 }