[wasm] Use more precise types for some WASM objects.

src/runtime/runtime-test.cc

Index: src/runtime/runtime-test.cc
diff --git a/src/runtime/runtime-test.cc b/src/runtime/runtime-test.cc
index 7054192a0f688aae0ece10d2c114aaa15dcdf802..199c423971195f571103b52cfb7813eebcdb36ae 100644
--- a/src/runtime/runtime-test.cc
+++ b/src/runtime/runtime-test.cc
@@ -736,15 +736,18 @@ RUNTIME_FUNCTION(Runtime_SpeciesProtector) {
   return isolate->heap()->ToBoolean(isolate->IsArraySpeciesLookupChainIntact());
 }
 
+#define CONVERT_ARG_HANDLE_CHECKED_2(Type, name, index) \
+  CHECK(Type::Is##Type(args[index]));                   \
+  Handle<Type> name = args.at<Type>(index);
+
 // Take a compiled wasm module, serialize it and copy the buffer into an array
 // buffer, which is then returned.
 RUNTIME_FUNCTION(Runtime_SerializeWasmModule) {
   HandleScope shs(isolate);
   DCHECK(args.length() == 1);
-  CONVERT_ARG_HANDLE_CHECKED(JSObject, module_obj, 0);
+  CONVERT_ARG_HANDLE_CHECKED_2(WasmModuleObject, module_obj, 0);
 
-  Handle<FixedArray> orig =
-      handle(FixedArray::cast(module_obj->GetInternalField(0)));
+  Handle<WasmCompiledModule> orig = handle(module_obj->get_compiled_module());
   std::unique_ptr<ScriptData> data =
       WasmCompiledModuleSerializer::SerializeWasmModule(isolate, orig);
   void* buff = isolate->array_buffer_allocator()->Allocate(data->length());
@@ -794,7 +797,7 @@ RUNTIME_FUNCTION(Runtime_DeserializeWasmModule) {
 RUNTIME_FUNCTION(Runtime_ValidateWasmInstancesChain) {
   HandleScope shs(isolate);
   DCHECK(args.length() == 2);
-  CONVERT_ARG_HANDLE_CHECKED(JSObject, module_obj, 0);
+  CONVERT_ARG_HANDLE_CHECKED_2(WasmModuleObject, module_obj, 0);
   CONVERT_ARG_HANDLE_CHECKED(Smi, instance_count, 1);
   wasm::testing::ValidateInstancesChain(isolate, module_obj,
                                         instance_count->value());
@@ -804,7 +807,7 @@ RUNTIME_FUNCTION(Runtime_ValidateWasmInstancesChain) {
 RUNTIME_FUNCTION(Runtime_ValidateWasmModuleState) {
   HandleScope shs(isolate);
   DCHECK(args.length() == 1);
-  CONVERT_ARG_HANDLE_CHECKED(JSObject, module_obj, 0);
+  CONVERT_ARG_HANDLE_CHECKED_2(WasmModuleObject, module_obj, 0);
   wasm::testing::ValidateModuleState(isolate, module_obj);
   return isolate->heap()->ToBoolean(true);
 }
@@ -812,8 +815,8 @@ RUNTIME_FUNCTION(Runtime_ValidateWasmModuleState) {
 RUNTIME_FUNCTION(Runtime_ValidateWasmOrphanedInstance) {
   HandleScope shs(isolate);
   DCHECK(args.length() == 1);
-  CONVERT_ARG_HANDLE_CHECKED(JSObject, instance_obj, 0);
-  wasm::testing::ValidateOrphanedInstance(isolate, instance_obj);
+  CONVERT_ARG_HANDLE_CHECKED_2(WasmInstanceObject, instance, 0);
+  wasm::testing::ValidateOrphanedInstance(isolate, instance);
   return isolate->heap()->ToBoolean(true);
 }