[wasm] cleanup wasm-module.cc

src/runtime/runtime-wasm.cc

 // Copyright 2016 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/runtime/runtime-utils.h"
 
 #include "src/arguments.h"
 #include "src/assembler.h"
 #include "src/compiler/wasm-compiler.h"
 #include "src/conversions.h"
@@ skipping 14 matching lines @@
   Handle<JSObject> module_instance;
 
   {
     // Get the module JSObject
     DisallowHeapAllocation no_allocation;
     const Address entry = Isolate::c_entry_fp(isolate->thread_local_top());
     Address pc =
         Memory::Address_at(entry + StandardFrameConstants::kCallerPCOffset);
     Code* code =
         isolate->inner_pointer_to_code_cache()->GetCacheEntry(pc)->code;
-    Object* undefined = *isolate->factory()->undefined_value();
-    Object* owning_instance = wasm::GetOwningWasmInstance(undefined, code);
+    Object* owning_instance = wasm::GetOwningWasmInstance(code);
     CHECK_NOT_NULL(owning_instance);
-    CHECK_NE(owning_instance, undefined);
     module_instance = handle(JSObject::cast(owning_instance), isolate);
   }
 
   Address old_mem_start, new_mem_start;
   uint32_t old_size, new_size;
 
   // Get mem buffer associated with module object
   MaybeHandle<JSArrayBuffer> maybe_mem_buffer =
       wasm::GetInstanceMemory(isolate, module_instance);
   Handle<JSArrayBuffer> old_buffer;
@@ skipping 86 matching lines @@
   Object* exception = args[0];
   // The unwinder will only deliver exceptions to wasm if the exception is a
   // Number or a Smi (which we have just converted to a Number.) This logic
   // lives in Isolate::is_catchable_by_wasm(Object*).
   CHECK(exception->IsNumber());
   return exception;
 }
 
 }  // namespace internal
 }  // namespace v8