src: move env init logic into Environment class

PR-URL: https://github.com/nodejs/node/pull/7090
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Trevor Norris <trev.norris@gmail.com>

src/env-inl.h

@@ -260,23 +260,6 @@ inline uv_idle_t* Environment::immediate_idle_handle() {
   return &immediate_idle_handle_;
 }
 
-inline Environment* Environment::from_idle_prepare_handle(
-    uv_prepare_t* handle) {
-  return ContainerOf(&Environment::idle_prepare_handle_, handle);
-}
-
-inline uv_prepare_t* Environment::idle_prepare_handle() {
-  return &idle_prepare_handle_;
-}
-
-inline Environment* Environment::from_idle_check_handle(uv_check_t* handle) {
-  return ContainerOf(&Environment::idle_check_handle_, handle);
-}
-
-inline uv_check_t* Environment::idle_check_handle() {
-  return &idle_check_handle_;
-}
-
 inline void Environment::RegisterHandleCleanup(uv_handle_t* handle,
                                                HandleCleanupCb cb,
                                                void *arg) {

src/env.cc

@@ -1,6 +1,8 @@
 #include "env.h"
 #include "env-inl.h"
+#include "async-wrap.h"
 #include "v8.h"
+#include "v8-profiler.h"
 
 #if defined(_MSC_VER)
 #define getpid GetCurrentProcessId
@@ -12,6 +14,8 @@
 
 namespace node {
 
+using v8::Context;
+using v8::FunctionTemplate;
 using v8::HandleScope;
 using v8::Local;
 using v8::Message;
@@ -19,6 +23,92 @@ using v8::StackFrame;
 using v8::StackTrace;
 using v8::Value;
 
+void Environment::Start(int argc,
+                        const char* const* argv,
+                        int exec_argc,
+                        const char* const* exec_argv,
+                        bool start_profiler_idle_notifier) {
+  HandleScope handle_scope(isolate());
+  Context::Scope context_scope(context());
+
+  isolate()->SetAutorunMicrotasks(false);
+
+  uv_check_init(event_loop(), immediate_check_handle());
+  uv_unref(reinterpret_cast<uv_handle_t*>(immediate_check_handle()));
+
+  uv_idle_init(event_loop(), immediate_idle_handle());
+
+  // Inform V8's CPU profiler when we're idle.  The profiler is sampling-based
+  // but not all samples are created equal; mark the wall clock time spent in
+  // epoll_wait() and friends so profiling tools can filter it out.  The samples
+  // still end up in v8.log but with state=IDLE rather than state=EXTERNAL.
+  // TODO(bnoordhuis) Depends on a libuv implementation detail that we should
+  // probably fortify in the API contract, namely that the last started prepare
+  // or check watcher runs first.  It's not 100% foolproof; if an add-on starts
+  // a prepare or check watcher after us, any samples attributed to its callback
+  // will be recorded with state=IDLE.
+  uv_prepare_init(event_loop(), &idle_prepare_handle_);
+  uv_check_init(event_loop(), &idle_check_handle_);
+  uv_unref(reinterpret_cast<uv_handle_t*>(&idle_prepare_handle_));
+  uv_unref(reinterpret_cast<uv_handle_t*>(&idle_check_handle_));
+
+  auto close_and_finish = [](Environment* env, uv_handle_t* handle, void* arg) {
+    handle->data = env;
+
+    uv_close(handle, [](uv_handle_t* handle) {
+      static_cast<Environment*>(handle->data)->FinishHandleCleanup(handle);
+    });
+  };
+
+  RegisterHandleCleanup(
+      reinterpret_cast<uv_handle_t*>(immediate_check_handle()),
+      close_and_finish,
+      nullptr);
+  RegisterHandleCleanup(
+      reinterpret_cast<uv_handle_t*>(immediate_idle_handle()),
+      close_and_finish,
+      nullptr);
+  RegisterHandleCleanup(
+      reinterpret_cast<uv_handle_t*>(&idle_prepare_handle_),
+      close_and_finish,
+      nullptr);
+  RegisterHandleCleanup(
+      reinterpret_cast<uv_handle_t*>(&idle_check_handle_),
+      close_and_finish,
+      nullptr);
+
+  if (start_profiler_idle_notifier) {
+    StartProfilerIdleNotifier();
+  }
+
+  auto process_template = FunctionTemplate::New(isolate());
+  process_template->SetClassName(FIXED_ONE_BYTE_STRING(isolate(), "process"));
+
+  auto process_object =
+      process_template->GetFunction()->NewInstance(context()).ToLocalChecked();
+  set_process_object(process_object);
+
+  SetupProcessObject(this, argc, argv, exec_argc, exec_argv);
+  LoadAsyncWrapperInfo(this);
+}
+
+void Environment::StartProfilerIdleNotifier() {
+  uv_prepare_start(&idle_prepare_handle_, [](uv_prepare_t* handle) {
+    Environment* env = ContainerOf(&Environment::idle_prepare_handle_, handle);
+    env->isolate()->GetCpuProfiler()->SetIdle(true);
+  });
+
+  uv_check_start(&idle_check_handle_, [](uv_check_t* handle) {
+    Environment* env = ContainerOf(&Environment::idle_check_handle_, handle);
+    env->isolate()->GetCpuProfiler()->SetIdle(false);
+  });
+}
+
+void Environment::StopProfilerIdleNotifier() {
+  uv_prepare_stop(&idle_prepare_handle_);
+  uv_check_stop(&idle_check_handle_);
+}
+
 void Environment::PrintSyncTrace() const {
   if (!trace_sync_io_)
     return;

src/env.h

@@ -449,11 +449,19 @@ class Environment {
   // See CreateEnvironment() in src/node.cc.
   static inline Environment* New(IsolateData* isolate_data,
                                  v8::Local<v8::Context> context);
+  void Start(int argc,
+             const char* const* argv,
+             int exec_argc,
+             const char* const* exec_argv,
+             bool start_profiler_idle_notifier);
   inline void CleanupHandles();
   inline void Dispose();
 
   void AssignToContext(v8::Local<v8::Context> context);
 
+  void StartProfilerIdleNotifier();
+  void StopProfilerIdleNotifier();
+
   inline v8::Isolate* isolate() const;
   inline uv_loop_t* event_loop() const;
   inline bool async_wrap_callbacks_enabled() const;
@@ -464,12 +472,6 @@ class Environment {
   inline uv_check_t* immediate_check_handle();
   inline uv_idle_t* immediate_idle_handle();
 
-  static inline Environment* from_idle_prepare_handle(uv_prepare_t* handle);
-  inline uv_prepare_t* idle_prepare_handle();
-
-  static inline Environment* from_idle_check_handle(uv_check_t* handle);
-  inline uv_check_t* idle_check_handle();
-
   // Register clean-up cb to be called on env->Dispose()
   inline void RegisterHandleCleanup(uv_handle_t* handle,
                                     HandleCleanupCb cb,

src/node.cc

@@ -101,7 +101,6 @@ using v8::Exception;
 using v8::Float64Array;
 using v8::Function;
 using v8::FunctionCallbackInfo;
-using v8::FunctionTemplate;
 using v8::HandleScope;
 using v8::HeapStatistics;
 using v8::Integer;
@@ -2864,39 +2863,15 @@ static void NeedImmediateCallbackSetter(
 }
 
 
-void SetIdle(uv_prepare_t* handle) {
-  Environment* env = Environment::from_idle_prepare_handle(handle);
-  env->isolate()->GetCpuProfiler()->SetIdle(true);
-}
-
-
-void ClearIdle(uv_check_t* handle) {
-  Environment* env = Environment::from_idle_check_handle(handle);
-  env->isolate()->GetCpuProfiler()->SetIdle(false);
-}
-
-
-void StartProfilerIdleNotifier(Environment* env) {
-  uv_prepare_start(env->idle_prepare_handle(), SetIdle);
-  uv_check_start(env->idle_check_handle(), ClearIdle);
-}
-
-
-void StopProfilerIdleNotifier(Environment* env) {
-  uv_prepare_stop(env->idle_prepare_handle());
-  uv_check_stop(env->idle_check_handle());
-}
-
-
 void StartProfilerIdleNotifier(const FunctionCallbackInfo<Value>& args) {
   Environment* env = Environment::GetCurrent(args);
-  StartProfilerIdleNotifier(env);
+  env->StartProfilerIdleNotifier();
 }
 
 
 void StopProfilerIdleNotifier(const FunctionCallbackInfo<Value>& args) {
   Environment* env = Environment::GetCurrent(args);
-  StopProfilerIdleNotifier(env);
+  env->StopProfilerIdleNotifier();
 }
 
 
@@ -4262,20 +4237,6 @@ int EmitExit(Environment* env) {
 }
 
 
-static void HandleCloseCb(uv_handle_t* handle) {
-  Environment* env = reinterpret_cast<Environment*>(handle->data);
-  env->FinishHandleCleanup(handle);
-}
-
-
-static void HandleCleanup(Environment* env,
-                          uv_handle_t* handle,
-                          void* arg) {
-  handle->data = env;
-  uv_close(handle, HandleCloseCb);
-}
-
-
 IsolateData* CreateIsolateData(Isolate* isolate, uv_loop_t* loop) {
   return new IsolateData(isolate, loop);
 }
@@ -4294,64 +4255,9 @@ Environment* CreateEnvironment(IsolateData* isolate_data,
                                const char* const* exec_argv) {
   Isolate* isolate = context->GetIsolate();
   HandleScope handle_scope(isolate);
-
   Context::Scope context_scope(context);
   Environment* env = Environment::New(isolate_data, context);
-
-  isolate->SetAutorunMicrotasks(false);
-
-  uv_check_init(env->event_loop(), env->immediate_check_handle());
-  uv_unref(
-      reinterpret_cast<uv_handle_t*>(env->immediate_check_handle()));
-
-  uv_idle_init(env->event_loop(), env->immediate_idle_handle());
-
-  // Inform V8's CPU profiler when we're idle.  The profiler is sampling-based
-  // but not all samples are created equal; mark the wall clock time spent in
-  // epoll_wait() and friends so profiling tools can filter it out.  The samples
-  // still end up in v8.log but with state=IDLE rather than state=EXTERNAL.
-  // TODO(bnoordhuis) Depends on a libuv implementation detail that we should
-  // probably fortify in the API contract, namely that the last started prepare
-  // or check watcher runs first.  It's not 100% foolproof; if an add-on starts
-  // a prepare or check watcher after us, any samples attributed to its callback
-  // will be recorded with state=IDLE.
-  uv_prepare_init(env->event_loop(), env->idle_prepare_handle());
-  uv_check_init(env->event_loop(), env->idle_check_handle());
-  uv_unref(reinterpret_cast<uv_handle_t*>(env->idle_prepare_handle()));
-  uv_unref(reinterpret_cast<uv_handle_t*>(env->idle_check_handle()));
-
-  // Register handle cleanups
-  env->RegisterHandleCleanup(
-      reinterpret_cast<uv_handle_t*>(env->immediate_check_handle()),
-      HandleCleanup,
-      nullptr);
-  env->RegisterHandleCleanup(
-      reinterpret_cast<uv_handle_t*>(env->immediate_idle_handle()),
-      HandleCleanup,
-      nullptr);
-  env->RegisterHandleCleanup(
-      reinterpret_cast<uv_handle_t*>(env->idle_prepare_handle()),
-      HandleCleanup,
-      nullptr);
-  env->RegisterHandleCleanup(
-      reinterpret_cast<uv_handle_t*>(env->idle_check_handle()),
-      HandleCleanup,
-      nullptr);
-
-  if (v8_is_profiling) {
-    StartProfilerIdleNotifier(env);
-  }
-
-  Local<FunctionTemplate> process_template = FunctionTemplate::New(isolate);
-  process_template->SetClassName(FIXED_ONE_BYTE_STRING(isolate, "process"));
-
-  Local<Object> process_object =
-      process_template->GetFunction()->NewInstance(context).ToLocalChecked();
-  env->set_process_object(process_object);
-
-  SetupProcessObject(env, argc, argv, exec_argc, exec_argv);
-  LoadAsyncWrapperInfo(env);
-
+  env->Start(argc, argv, exec_argc, exec_argv, v8_is_profiling);
   return env;
 }
 

src/node_internals.h

@@ -145,6 +145,12 @@ NO_RETURN void FatalError(const char* location, const char* message);
 
 v8::Local<v8::Value> BuildStatsObject(Environment* env, const uv_stat_t* s);
 
+void SetupProcessObject(Environment* env,
+                        int argc,
+                        const char* const* argv,
+                        int exec_argc,
+                        const char* const* exec_argv);
+
 enum Endianness {
   kLittleEndian,  // _Not_ LITTLE_ENDIAN, clashes with endian.h.
   kBigEndian