Generate code for store buffer updates in open-coded object field stores.

runtime/vm/code_generator.cc

Index: runtime/vm/code_generator.cc
diff --git a/runtime/vm/code_generator.cc b/runtime/vm/code_generator.cc
index 42b0f13c4f34416fcc5bb89728ca89fb4bddc3a7..4b7203ed72dcec74ea953e4a8dd39350e50c9394 100644
--- a/runtime/vm/code_generator.cc
+++ b/runtime/vm/code_generator.cc
@@ -1561,4 +1561,14 @@ RawCode* FunctionsCache::LookupCode(const String& function_name,
   return Code::null();
 }
 
+
+// Adds a pointer to the store buffer.
+// Arg0: pointer
+DEFINE_RUNTIME_ENTRY(StoreBuffer, 1) {
+  ASSERT(arguments.Count() == kStoreBufferRuntimeEntry.argument_count());
+  RawObject* dest = arguments.At(0);

[srdjan, 2012/06/12 06:57:08]

I would use the CheckedHandle thus verifying that an object is being passed.

[cshapiro, 2012/06/12 21:41:01]

This is not an object, just a field address.  I think you made the same
observation in the previous round.  I will remove the assignment to RawObject
(casting directly to a uword) and add a comment.

+  uword ptr = reinterpret_cast<uword>(dest);
+  isolate->store_buffer()->AddPointer(ptr);
+}
+
 }  // namespace dart