src: use JS inheritance for AsyncWrap

For all classes descending from `AsyncWrap`, use JS inheritance instead of manually adding methods to the individual classes. This allows cleanup of some code around transferring handles over IPC. Backport-PR-URL: #23247 PR-URL: #23094 Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com> Reviewed-By: Daniel Bevenius <daniel.bevenius@gmail.com> Reviewed-By: James M Snell <jasnell@gmail.com>
nodejs · Oct 7, 2018 · 5a83967 · 5a83967
1 parent 11c6745
commit 5a83967
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Showing 32 changed files with 141 additions and 204 deletions.
diff --git a/lib/internal/worker.js b/lib/internal/worker.js
@@ -73,7 +73,8 @@ Object.setPrototypeOf(MessagePort.prototype, EventEmitter.prototype);
 delete MessagePort.prototype.stop;
 delete MessagePort.prototype.drain;
 delete MessagePort.prototype.hasRef;
-delete MessagePort.prototype.getAsyncId;
+MessagePort.prototype.ref = MessagePortPrototype.ref;
+MessagePort.prototype.unref = MessagePortPrototype.unref;
 
 // A communication channel consisting of a handle (that wraps around an
 // uv_async_t) which can receive information from other threads and emits

diff --git a/node.gyp b/node.gyp
@@ -426,7 +426,6 @@
         'src/node_root_certs.h',
         'src/node_version.h',
         'src/node_watchdog.h',
-        'src/node_wrap.h',
         'src/node_revert.h',
         'src/node_i18n.h',
         'src/node_worker.h',

diff --git a/src/async_wrap.cc b/src/async_wrap.cc
@@ -63,7 +63,7 @@ struct AsyncWrapObject : public AsyncWrap {
   static inline void New(const FunctionCallbackInfo<Value>& args) {
     Environment* env = Environment::GetCurrent(args);
     CHECK(args.IsConstructCall());
-    CHECK(env->async_wrap_constructor_template()->HasInstance(args.This()));
+    CHECK(env->async_wrap_object_ctor_template()->HasInstance(args.This()));
     CHECK(args[0]->IsUint32());
     auto type = static_cast<ProviderType>(args[0].As<Uint32>()->Value());
     new AsyncWrapObject(env, args.This(), type);
@@ -423,12 +423,16 @@ void AsyncWrap::QueueDestroyAsyncId(const FunctionCallbackInfo<Value>& args) {
       args[0].As<Number>()->Value());
 }
 
-void AsyncWrap::AddWrapMethods(Environment* env,
-                               Local<FunctionTemplate> constructor,
-                               int flag) {
-  env->SetProtoMethod(constructor, "getAsyncId", AsyncWrap::GetAsyncId);
-  if (flag & kFlagHasReset)
-    env->SetProtoMethod(constructor, "asyncReset", AsyncWrap::AsyncReset);
+Local<FunctionTemplate> AsyncWrap::GetConstructorTemplate(Environment* env) {
+  Local<FunctionTemplate> tmpl = env->async_wrap_ctor_template();
+  if (tmpl.IsEmpty()) {
+    tmpl = env->NewFunctionTemplate(nullptr);
+    tmpl->SetClassName(FIXED_ONE_BYTE_STRING(env->isolate(), "AsyncWrap"));
+    env->SetProtoMethod(tmpl, "getAsyncId", AsyncWrap::GetAsyncId);
+    env->SetProtoMethod(tmpl, "asyncReset", AsyncWrap::AsyncReset);
+    env->set_async_wrap_ctor_template(tmpl);
+  }
+  return tmpl;
 }
 
 void AsyncWrap::Initialize(Local<Object> target,
@@ -524,17 +528,20 @@ void AsyncWrap::Initialize(Local<Object> target,
   env->set_async_hooks_promise_resolve_function(Local<Function>());
   env->set_async_hooks_binding(target);
 
+  // TODO(addaleax): This block might better work as a
+  // AsyncWrapObject::Initialize() or AsyncWrapObject::GetConstructorTemplate()
+  // function.
   {
     auto class_name = FIXED_ONE_BYTE_STRING(env->isolate(), "AsyncWrap");
     auto function_template = env->NewFunctionTemplate(AsyncWrapObject::New);
     function_template->SetClassName(class_name);
-    AsyncWrap::AddWrapMethods(env, function_template);
+    function_template->Inherit(AsyncWrap::GetConstructorTemplate(env));
     auto instance_template = function_template->InstanceTemplate();
     instance_template->SetInternalFieldCount(1);
     auto function =
         function_template->GetFunction(env->context()).ToLocalChecked();
     target->Set(env->context(), class_name, function).FromJust();
-    env->set_async_wrap_constructor_template(function_template);
+    env->set_async_wrap_object_ctor_template(function_template);
   }
 }
 

diff --git a/src/async_wrap.h b/src/async_wrap.h
@@ -105,21 +105,15 @@ class AsyncWrap : public BaseObject {
     PROVIDERS_LENGTH,
   };
 
-  enum Flags {
-    kFlagNone = 0x0,
-    kFlagHasReset = 0x1
-  };
-
   AsyncWrap(Environment* env,
             v8::Local<v8::Object> object,
             ProviderType provider,
             double execution_async_id = -1);
 
   virtual ~AsyncWrap();
 
-  static void AddWrapMethods(Environment* env,
-                             v8::Local<v8::FunctionTemplate> constructor,
-                             int flags = kFlagNone);
+  static v8::Local<v8::FunctionTemplate> GetConstructorTemplate(
+      Environment* env);
 
   static void Initialize(v8::Local<v8::Object> target,
                          v8::Local<v8::Value> unused,

diff --git a/src/cares_wrap.cc b/src/cares_wrap.cc
@@ -2220,23 +2220,23 @@ void Initialize(Local<Object> target,
 
   Local<FunctionTemplate> aiw =
       BaseObject::MakeLazilyInitializedJSTemplate(env);
-  AsyncWrap::AddWrapMethods(env, aiw);
+  aiw->Inherit(AsyncWrap::GetConstructorTemplate(env));
   Local<String> addrInfoWrapString =
       FIXED_ONE_BYTE_STRING(env->isolate(), "GetAddrInfoReqWrap");
   aiw->SetClassName(addrInfoWrapString);
   target->Set(addrInfoWrapString, aiw->GetFunction(context).ToLocalChecked());
 
   Local<FunctionTemplate> niw =
       BaseObject::MakeLazilyInitializedJSTemplate(env);
-  AsyncWrap::AddWrapMethods(env, niw);
+  niw->Inherit(AsyncWrap::GetConstructorTemplate(env));
   Local<String> nameInfoWrapString =
       FIXED_ONE_BYTE_STRING(env->isolate(), "GetNameInfoReqWrap");
   niw->SetClassName(nameInfoWrapString);
   target->Set(nameInfoWrapString, niw->GetFunction(context).ToLocalChecked());
 
   Local<FunctionTemplate> qrw =
       BaseObject::MakeLazilyInitializedJSTemplate(env);
-  AsyncWrap::AddWrapMethods(env, qrw);
+  qrw->Inherit(AsyncWrap::GetConstructorTemplate(env));
   Local<String> queryWrapString =
       FIXED_ONE_BYTE_STRING(env->isolate(), "QueryReqWrap");
   qrw->SetClassName(queryWrapString);
@@ -2245,7 +2245,7 @@ void Initialize(Local<Object> target,
   Local<FunctionTemplate> channel_wrap =
       env->NewFunctionTemplate(ChannelWrap::New);
   channel_wrap->InstanceTemplate()->SetInternalFieldCount(1);
-  AsyncWrap::AddWrapMethods(env, channel_wrap);
+  channel_wrap->Inherit(AsyncWrap::GetConstructorTemplate(env));
 
   env->SetProtoMethod(channel_wrap, "queryAny", Query<QueryAnyWrap>);
   env->SetProtoMethod(channel_wrap, "queryA", Query<QueryAWrap>);

diff --git a/src/env.h b/src/env.h
@@ -319,7 +319,8 @@ struct PackageConfig {
   V(async_hooks_destroy_function, v8::Function)                               \
   V(async_hooks_init_function, v8::Function)                                  \
   V(async_hooks_promise_resolve_function, v8::Function)                       \
-  V(async_wrap_constructor_template, v8::FunctionTemplate)                    \
+  V(async_wrap_object_ctor_template, v8::FunctionTemplate)                    \
+  V(async_wrap_ctor_template, v8::FunctionTemplate)                           \
   V(buffer_prototype_object, v8::Object)                                      \
   V(context, v8::Context)                                                     \
   V(domain_callback, v8::Function)                                            \
@@ -329,13 +330,15 @@ struct PackageConfig {
   V(filehandlereadwrap_template, v8::ObjectTemplate)                          \
   V(fsreqpromise_constructor_template, v8::ObjectTemplate)                    \
   V(fs_use_promises_symbol, v8::Symbol)                                       \
+  V(handle_wrap_ctor_template, v8::FunctionTemplate)                          \
   V(host_import_module_dynamically_callback, v8::Function)                    \
   V(host_initialize_import_meta_object_callback, v8::Function)                \
   V(http2ping_constructor_template, v8::ObjectTemplate)                       \
   V(http2settings_constructor_template, v8::ObjectTemplate)                   \
   V(http2stream_constructor_template, v8::ObjectTemplate)                     \
   V(immediate_callback_function, v8::Function)                                \
   V(inspector_console_api_object, v8::Object)                                 \
+  V(libuv_stream_wrap_ctor_template, v8::FunctionTemplate)                    \
   V(message_port, v8::Object)                                                 \
   V(message_port_constructor_template, v8::FunctionTemplate)                  \
   V(pipe_constructor_template, v8::FunctionTemplate)                          \

diff --git a/src/fs_event_wrap.cc b/src/fs_event_wrap.cc
@@ -105,7 +105,7 @@ void FSEventWrap::Initialize(Local<Object> target,
   t->InstanceTemplate()->SetInternalFieldCount(1);
   t->SetClassName(fsevent_string);
 
-  AsyncWrap::AddWrapMethods(env, t);
+  t->Inherit(AsyncWrap::GetConstructorTemplate(env));
   env->SetProtoMethod(t, "start", Start);
   env->SetProtoMethod(t, "close", Close);
 

diff --git a/src/handle_wrap.cc b/src/handle_wrap.cc
@@ -130,13 +130,19 @@ void HandleWrap::OnClose(uv_handle_t* handle) {
   }
 }
 
-
-void HandleWrap::AddWrapMethods(Environment* env,
-                                Local<FunctionTemplate> t) {
-  env->SetProtoMethod(t, "close", HandleWrap::Close);
-  env->SetProtoMethodNoSideEffect(t, "hasRef", HandleWrap::HasRef);
-  env->SetProtoMethod(t, "ref", HandleWrap::Ref);
-  env->SetProtoMethod(t, "unref", HandleWrap::Unref);
+Local<FunctionTemplate> HandleWrap::GetConstructorTemplate(Environment* env) {
+  Local<FunctionTemplate> tmpl = env->handle_wrap_ctor_template();
+  if (tmpl.IsEmpty()) {
+    tmpl = env->NewFunctionTemplate(nullptr);
+    tmpl->SetClassName(FIXED_ONE_BYTE_STRING(env->isolate(), "HandleWrap"));
+    tmpl->Inherit(AsyncWrap::GetConstructorTemplate(env));
+    env->SetProtoMethod(tmpl, "close", HandleWrap::Close);
+    env->SetProtoMethodNoSideEffect(tmpl, "hasRef", HandleWrap::HasRef);
+    env->SetProtoMethod(tmpl, "ref", HandleWrap::Ref);
+    env->SetProtoMethod(tmpl, "unref", HandleWrap::Unref);
+    env->set_handle_wrap_ctor_template(tmpl);
+  }
+  return tmpl;
 }
 
 

diff --git a/src/handle_wrap.h b/src/handle_wrap.h
@@ -73,8 +73,8 @@ class HandleWrap : public AsyncWrap {
   virtual void Close(
       v8::Local<v8::Value> close_callback = v8::Local<v8::Value>());
 
-  static void AddWrapMethods(Environment* env,
-                             v8::Local<v8::FunctionTemplate> constructor);
+  static v8::Local<v8::FunctionTemplate> GetConstructorTemplate(
+      Environment* env);
 
  protected:
   HandleWrap(Environment* env,

diff --git a/src/inspector_js_api.cc b/src/inspector_js_api.cc
@@ -307,7 +307,7 @@ void Initialize(Local<Object> target, Local<Value> unused,
       env->NewFunctionTemplate(JSBindingsConnection::New);
   tmpl->InstanceTemplate()->SetInternalFieldCount(1);
   tmpl->SetClassName(conn_str);
-  AsyncWrap::AddWrapMethods(env, tmpl);
+  tmpl->Inherit(AsyncWrap::GetConstructorTemplate(env));
   env->SetProtoMethod(tmpl, "dispatch", JSBindingsConnection::Dispatch);
   env->SetProtoMethod(tmpl, "disconnect", JSBindingsConnection::Disconnect);
   target

diff --git a/src/js_stream.cc b/src/js_stream.cc
@@ -202,8 +202,7 @@ void JSStream::Initialize(Local<Object> target,
       FIXED_ONE_BYTE_STRING(env->isolate(), "JSStream");
   t->SetClassName(jsStreamString);
   t->InstanceTemplate()->SetInternalFieldCount(1);
-
-  AsyncWrap::AddWrapMethods(env, t);
+  t->Inherit(AsyncWrap::GetConstructorTemplate(env));
 
   env->SetProtoMethod(t, "finishWrite", Finish<WriteWrap>);
   env->SetProtoMethod(t, "finishShutdown", Finish<ShutdownWrap>);

diff --git a/src/node_file.cc b/src/node_file.cc
@@ -2250,7 +2250,7 @@ void Initialize(Local<Object> target,
   // Create FunctionTemplate for FSReqCallback
   Local<FunctionTemplate> fst = env->NewFunctionTemplate(NewFSReqWrap);
   fst->InstanceTemplate()->SetInternalFieldCount(1);
-  AsyncWrap::AddWrapMethods(env, fst);
+  fst->Inherit(AsyncWrap::GetConstructorTemplate(env));
   Local<String> wrapString = FIXED_ONE_BYTE_STRING(isolate, "FSReqWrap");
   fst->SetClassName(wrapString);
   target
@@ -2262,7 +2262,7 @@ void Initialize(Local<Object> target,
   // to do anything in the constructor, so we only store the instance template.
   Local<FunctionTemplate> fh_rw = FunctionTemplate::New(isolate);
   fh_rw->InstanceTemplate()->SetInternalFieldCount(1);
-  AsyncWrap::AddWrapMethods(env, fh_rw);
+  fh_rw->Inherit(AsyncWrap::GetConstructorTemplate(env));
   Local<String> fhWrapString =
       FIXED_ONE_BYTE_STRING(isolate, "FileHandleReqWrap");
   fh_rw->SetClassName(fhWrapString);
@@ -2271,7 +2271,7 @@ void Initialize(Local<Object> target,
 
   // Create Function Template for FSReqPromise
   Local<FunctionTemplate> fpt = FunctionTemplate::New(isolate);
-  AsyncWrap::AddWrapMethods(env, fpt);
+  fpt->Inherit(AsyncWrap::GetConstructorTemplate(env));
   Local<String> promiseString =
       FIXED_ONE_BYTE_STRING(isolate, "FSReqPromise");
   fpt->SetClassName(promiseString);
@@ -2281,7 +2281,7 @@ void Initialize(Local<Object> target,
 
   // Create FunctionTemplate for FileHandle
   Local<FunctionTemplate> fd = env->NewFunctionTemplate(FileHandle::New);
-  AsyncWrap::AddWrapMethods(env, fd);
+  fd->Inherit(AsyncWrap::GetConstructorTemplate(env));
   env->SetProtoMethod(fd, "close", FileHandle::Close);
   env->SetProtoMethod(fd, "releaseFD", FileHandle::ReleaseFD);
   Local<ObjectTemplate> fdt = fd->InstanceTemplate();
@@ -2300,7 +2300,7 @@ void Initialize(Local<Object> target,
   Local<FunctionTemplate> fdclose = FunctionTemplate::New(isolate);
   fdclose->SetClassName(FIXED_ONE_BYTE_STRING(isolate,
                         "FileHandleCloseReq"));
-  AsyncWrap::AddWrapMethods(env, fdclose);
+  fdclose->Inherit(AsyncWrap::GetConstructorTemplate(env));
   Local<ObjectTemplate> fdcloset = fdclose->InstanceTemplate();
   fdcloset->SetInternalFieldCount(1);
   env->set_fdclose_constructor_template(fdcloset);

diff --git a/src/node_http2.cc b/src/node_http2.cc
@@ -2960,14 +2960,14 @@ void Initialize(Local<Object> target,
 
   Local<FunctionTemplate> ping = FunctionTemplate::New(env->isolate());
   ping->SetClassName(FIXED_ONE_BYTE_STRING(env->isolate(), "Http2Ping"));
-  AsyncWrap::AddWrapMethods(env, ping);
+  ping->Inherit(AsyncWrap::GetConstructorTemplate(env));
   Local<ObjectTemplate> pingt = ping->InstanceTemplate();
   pingt->SetInternalFieldCount(1);
   env->set_http2ping_constructor_template(pingt);
 
   Local<FunctionTemplate> setting = FunctionTemplate::New(env->isolate());
   setting->SetClassName(FIXED_ONE_BYTE_STRING(env->isolate(), "Http2Setting"));
-  AsyncWrap::AddWrapMethods(env, setting);
+  setting->Inherit(AsyncWrap::GetConstructorTemplate(env));
   Local<ObjectTemplate> settingt = setting->InstanceTemplate();
   settingt->SetInternalFieldCount(1);
   env->set_http2settings_constructor_template(settingt);
@@ -2984,7 +2984,7 @@ void Initialize(Local<Object> target,
   env->SetProtoMethod(stream, "respond", Http2Stream::Respond);
   env->SetProtoMethod(stream, "rstStream", Http2Stream::RstStream);
   env->SetProtoMethod(stream, "refreshState", Http2Stream::RefreshState);
-  AsyncWrap::AddWrapMethods(env, stream);
+  stream->Inherit(AsyncWrap::GetConstructorTemplate(env));
   StreamBase::AddMethods<Http2Stream>(env, stream);
   Local<ObjectTemplate> streamt = stream->InstanceTemplate();
   streamt->SetInternalFieldCount(1);
@@ -2997,7 +2997,7 @@ void Initialize(Local<Object> target,
       env->NewFunctionTemplate(Http2Session::New);
   session->SetClassName(http2SessionClassName);
   session->InstanceTemplate()->SetInternalFieldCount(1);
-  AsyncWrap::AddWrapMethods(env, session);
+  session->Inherit(AsyncWrap::GetConstructorTemplate(env));
   env->SetProtoMethod(session, "origin", Http2Session::Origin);
   env->SetProtoMethod(session, "altsvc", Http2Session::AltSvc);
   env->SetProtoMethod(session, "ping", Http2Session::Ping);

diff --git a/src/node_http_parser.cc b/src/node_http_parser.cc
@@ -763,7 +763,7 @@ void Initialize(Local<Object> target,
 #undef V
   target->Set(FIXED_ONE_BYTE_STRING(env->isolate(), "methods"), methods);
 
-  AsyncWrap::AddWrapMethods(env, t);
+  t->Inherit(AsyncWrap::GetConstructorTemplate(env));
   env->SetProtoMethod(t, "close", Parser::Close);
   env->SetProtoMethod(t, "free", Parser::Free);
   env->SetProtoMethod(t, "execute", Parser::Execute);

diff --git a/src/node_messaging.cc b/src/node_messaging.cc
@@ -722,9 +722,7 @@ MaybeLocal<Function> GetMessagePortConstructor(
     Local<FunctionTemplate> m = env->NewFunctionTemplate(MessagePort::New);
     m->SetClassName(env->message_port_constructor_string());
     m->InstanceTemplate()->SetInternalFieldCount(1);
-
-    AsyncWrap::AddWrapMethods(env, m);
-    HandleWrap::AddWrapMethods(env, m);
+    m->Inherit(HandleWrap::GetConstructorTemplate(env));
 
     env->SetProtoMethod(m, "postMessage", MessagePort::PostMessage);
     env->SetProtoMethod(m, "start", MessagePort::Start);

diff --git a/src/node_stat_watcher.cc b/src/node_stat_watcher.cc
@@ -50,9 +50,7 @@ void StatWatcher::Initialize(Environment* env, Local<Object> target) {
   Local<String> statWatcherString =
       FIXED_ONE_BYTE_STRING(env->isolate(), "StatWatcher");
   t->SetClassName(statWatcherString);
-
-  AsyncWrap::AddWrapMethods(env, t);
-  HandleWrap::AddWrapMethods(env, t);
+  t->Inherit(HandleWrap::GetConstructorTemplate(env));
 
   env->SetProtoMethod(t, "start", StatWatcher::Start);
 

diff --git a/src/node_worker.cc b/src/node_worker.cc
@@ -481,8 +481,8 @@ void InitWorker(Local<Object> target,
     Local<FunctionTemplate> w = env->NewFunctionTemplate(Worker::New);
 
     w->InstanceTemplate()->SetInternalFieldCount(1);
+    w->Inherit(AsyncWrap::GetConstructorTemplate(env));
 
-    AsyncWrap::AddWrapMethods(env, w);
     env->SetProtoMethod(w, "startThread", Worker::StartThread);
     env->SetProtoMethod(w, "stopThread", Worker::StopThread);
     env->SetProtoMethod(w, "ref", Worker::Ref);