[wasm] reuse the first compiled module

src/wasm/wasm-module.h

Index: src/wasm/wasm-module.h
diff --git a/src/wasm/wasm-module.h b/src/wasm/wasm-module.h
index f3b9b8c15c68784dfabd493e0ee7826a6ce0234e..4d97f6ca99d43dde4edb4623045ca077632d2ec8 100644
--- a/src/wasm/wasm-module.h
+++ b/src/wasm/wasm-module.h
@@ -415,6 +415,10 @@ MaybeHandle<JSObject> CreateModuleObjectFromBytes(Isolate* isolate,
 // was collected, or the instance object owning the Code object
 Object* GetOwningWasmInstance(Object* undefined, Code* code);
 
+MaybeHandle<JSArrayBuffer> GetInstanceMemory(Isolate* isolate,
+                                             Handle<JSObject> instance);
+void SetInstanceMemory(Handle<JSObject> instance, JSArrayBuffer* buffer);
+
 namespace testing {
 
 // Decode, verify, and run the function labeled "main" in the
@@ -425,6 +429,12 @@ int32_t CompileAndRunWasmModule(Isolate* isolate, const byte* module_start,
 int32_t CallFunction(Isolate* isolate, Handle<JSObject> instance,
                      ErrorThrower* thrower, const char* name, int argc,
                      Handle<Object> argv[], bool asm_js = false);
+
+void ValidateInstancesChain(Isolate* isolate, Handle<JSObject> module_obj,
+                            int instance_count);
+void ValidateModuleState(Isolate* isolate, Handle<JSObject> module_obj);
+void ValidateOrphanedInstance(Isolate* isolate, Handle<JSObject> instance);
+
 }  // namespace testing
 }  // namespace wasm
 }  // namespace internal