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..30b51e0d819e72fc5dc0fab611a26555a97d8304 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) {

[Ivan Posva, 2012/06/08 14:39:55]

This then would be StoreBuffer_Process.

+  ASSERT(arguments.Count() == kStoreBufferRuntimeEntry.argument_count());
+  RawObject* dest = arguments.At(0);

[srdjan, 2012/06/08 05:46:59]

You may want to do Object::CheckedHandle so that you guarantee that the object
is a an object?

[cshapiro, 2012/06/08 23:48:04]

Unfortunately, I cannot.  dest is not an object, it is just a field address.

+  uword ptr = reinterpret_cast<uword>(dest);
+  Isolate::Current()->store_buffer()->AddPointer(ptr);

[siva, 2012/06/08 17:26:01]

isolate->store_buffer()....

isolate is a param to runtime entry calls and is already set up.

[cshapiro, 2012/06/08 23:48:04]

Fixed.

+}
+
 }  // namespace dart