fixup: use inlined typed array

Signed-off-by: Daeyeon Jeong <daeyeon.dev@gmail.com>

lib/internal/bootstrap/node.js

@@ -80,7 +80,6 @@ const {
   validateInteger,
 } = require('internal/validators');
 const {
-  exiting_aliased_Uint32Array,
   exit_info_private_symbol,
   getHiddenValue,
 } = internalBinding('util');
@@ -91,31 +90,28 @@ setupGlobalProxy();
 setupBuffer();
 
 process.domain = null;
+
+// process._exiting and process.exitCode
 {
-  const exitingAliasedUint32Array =
-    getHiddenValue(process, exiting_aliased_Uint32Array);
+  // Must match `Environment::ExitInfoFields` in `src/env.h`.
+  const kExiting = 0;
+  const kExitCode = 1;
+  const kHasExitCode = 2;
+  const fields = getHiddenValue(process, exit_info_private_symbol);
+
   ObjectDefineProperty(process, '_exiting', {
     __proto__: null,
     get() {
-      return exitingAliasedUint32Array[0] === 1;
+      return fields[kExiting] === 1;
     },
     set(value) {
-      exitingAliasedUint32Array[0] = value ? 1 : 0;
+      fields[kExiting] = value ? 1 : 0;
     },
     enumerable: true,
     configurable: true,
   });
-}
-process._exiting = false;
-
-{
-  // Must match `Environment::ExitInfo::Fields` in `src/env.h`.
-  const kExitCode = 0;
-  const kHasExitCode = 1;
-  const fields = getHiddenValue(process, exit_info_private_symbol);
 
   let exitCode;
-
   ObjectDefineProperty(process, 'exitCode', {
     __proto__: null,
     get() {
@@ -140,6 +136,7 @@ process._exiting = false;
     configurable: false,
   });
 }
+process._exiting = false;
 
 // process.config is serialized config.gypi
 const nativeModule = internalBinding('builtins');

src/api/hooks.cc

@@ -39,7 +39,7 @@ Maybe<bool> EmitProcessBeforeExit(Environment* env) {
   HandleScope handle_scope(isolate);
   Context::Scope context_scope(env->context());
 
-  Local<Integer> exit_code = v8::Integer::New(
+  Local<Integer> exit_code = Integer::New(
       isolate,
       env->maybe_exit_code(static_cast<int32_t>(ExitCode::kNoFailure)));
 

src/env-inl.h

@@ -171,18 +171,6 @@ inline bool TickInfo::has_rejection_to_warn() const {
   return fields_[kHasRejectionToWarn] == 1;
 }
 
-inline const AliasedInt32Array& ExitInfo::fields() {
-  return fields_;
-}
-
-inline bool ExitInfo::has_exit_code() const {
-  return fields_[kHasExitCode] == 1;
-}
-
-inline int32_t ExitInfo::exit_code() const {
-  return fields_[kExitCode];
-}
-
 inline Environment* Environment::GetCurrent(v8::Isolate* isolate) {
   if (UNLIKELY(!isolate->InContext())) return nullptr;
   v8::HandleScope handle_scope(isolate);
@@ -339,14 +327,6 @@ inline TickInfo* Environment::tick_info() {
   return &tick_info_;
 }
 
-inline ExitInfo* Environment::exit_info() {
-  return &exit_info_;
-}
-
-inline int32_t Environment::maybe_exit_code(const int32_t default_code) const {
-  return exit_info_.has_exit_code() ? exit_info_.exit_code() : default_code;
-}
-
 inline uint64_t Environment::timer_base() const {
   return timer_base_;
 }
@@ -384,11 +364,15 @@ inline bool Environment::force_context_aware() const {
 }
 
 inline void Environment::set_exiting(bool value) {
-  exiting_[0] = value ? 1 : 0;
+  exit_info_[kExiting] = value ? 1 : 0;
+}
+
+inline int32_t Environment::maybe_exit_code(const int32_t default_code) const {
+  return exit_info_[kHasExitCode] == 0 ? default_code : exit_info_[kExitCode];
 }
 
-inline AliasedUint32Array& Environment::exiting() {
-  return exiting_;
+inline AliasedInt32Array& Environment::exit_info() {
+  return exit_info_;
 }
 
 inline void Environment::set_abort_on_uncaught_exception(bool value) {

src/env.cc

@@ -640,12 +640,11 @@ Environment::Environment(IsolateData* isolate_data,
       async_hooks_(isolate, MAYBE_FIELD_PTR(env_info, async_hooks)),
       immediate_info_(isolate, MAYBE_FIELD_PTR(env_info, immediate_info)),
       tick_info_(isolate, MAYBE_FIELD_PTR(env_info, tick_info)),
-      exit_info_(isolate, MAYBE_FIELD_PTR(env_info, exit_info)),
       timer_base_(uv_now(isolate_data->event_loop())),
       exec_argv_(exec_args),
       argv_(args),
       exec_path_(GetExecPath(args)),
-      exiting_(isolate_, 1, MAYBE_FIELD_PTR(env_info, exiting)),
+      exit_info_(isolate_, 3, MAYBE_FIELD_PTR(env_info, exit_info)),
       should_abort_on_uncaught_toggle_(
           isolate_,
           1,
@@ -1508,29 +1507,6 @@ void AsyncHooks::FailWithCorruptedAsyncStack(double expected_async_id) {
   ABORT_NO_BACKTRACE();
 }
 
-ExitInfo::SerializeInfo ExitInfo::Serialize(Local<Context> context,
-                                            SnapshotCreator* creator) {
-  return {fields_.Serialize(context, creator)};
-}
-
-void ExitInfo::Deserialize(Local<Context> context) {
-  fields_.Deserialize(context);
-}
-
-std::ostream& operator<<(std::ostream& output,
-                         const ExitInfo::SerializeInfo& i) {
-  output << "{ " << i.fields << " }";
-  return output;
-}
-
-void ExitInfo::MemoryInfo(MemoryTracker* tracker) const {
-  tracker->TrackField("fields", fields_);
-}
-
-ExitInfo::ExitInfo(Isolate* isolate, const SerializeInfo* info)
-    : fields_(
-          isolate, kFieldsCount, info == nullptr ? nullptr : &(info->fields)) {}
-
 void Environment::Exit(ExitCode exit_code) {
   if (options()->trace_exit) {
     HandleScope handle_scope(isolate());
@@ -1619,9 +1595,8 @@ EnvSerializeInfo Environment::Serialize(SnapshotCreator* creator) {
   info.async_hooks = async_hooks_.Serialize(ctx, creator);
   info.immediate_info = immediate_info_.Serialize(ctx, creator);
   info.tick_info = tick_info_.Serialize(ctx, creator);
-  info.exit_info = exit_info_.Serialize(ctx, creator);
   info.performance_state = performance_state_->Serialize(ctx, creator);
-  info.exiting = exiting_.Serialize(ctx, creator);
+  info.exit_info = exit_info_.Serialize(ctx, creator);
   info.stream_base_state = stream_base_state_.Serialize(ctx, creator);
   info.should_abort_on_uncaught_toggle =
       should_abort_on_uncaught_toggle_.Serialize(ctx, creator);
@@ -1662,9 +1637,8 @@ void Environment::DeserializeProperties(const EnvSerializeInfo* info) {
   async_hooks_.Deserialize(ctx);
   immediate_info_.Deserialize(ctx);
   tick_info_.Deserialize(ctx);
-  exit_info_.Deserialize(ctx);
   performance_state_->Deserialize(ctx);
-  exiting_.Deserialize(ctx);
+  exit_info_.Deserialize(ctx);
   stream_base_state_.Deserialize(ctx);
   should_abort_on_uncaught_toggle_.Deserialize(ctx);
 
@@ -1851,15 +1825,14 @@ void Environment::MemoryInfo(MemoryTracker* tracker) const {
   tracker->TrackField("builtins_without_cache", builtins_without_cache);
   tracker->TrackField("destroy_async_id_list", destroy_async_id_list_);
   tracker->TrackField("exec_argv", exec_argv_);
-  tracker->TrackField("exiting", exiting_);
+  tracker->TrackField("exit_info", exit_info_);
   tracker->TrackField("should_abort_on_uncaught_toggle",
                       should_abort_on_uncaught_toggle_);
   tracker->TrackField("stream_base_state", stream_base_state_);
   tracker->TrackField("cleanup_queue", cleanup_queue_);
   tracker->TrackField("async_hooks", async_hooks_);
   tracker->TrackField("immediate_info", immediate_info_);
   tracker->TrackField("tick_info", tick_info_);
-  tracker->TrackField("exit_info", exit_info_);
   tracker->TrackField("principal_realm", principal_realm_);
 
   // FIXME(joyeecheung): track other fields in Environment.

src/env.h

@@ -459,40 +459,8 @@ class TickInfo : public MemoryRetainer {
   AliasedUint8Array fields_;
 };
 
-class ExitInfo : public MemoryRetainer {
- public:
-  inline const AliasedInt32Array& fields();
-  inline bool has_exit_code() const;
-  inline int32_t exit_code() const;
-
-  SET_MEMORY_INFO_NAME(ExitInfo)
-  SET_SELF_SIZE(ExitInfo)
-  void MemoryInfo(MemoryTracker* tracker) const override;
-
-  ExitInfo(const ExitInfo&) = delete;
-  ExitInfo& operator=(const ExitInfo&) = delete;
-  ExitInfo(ExitInfo&&) = delete;
-  ExitInfo& operator=(ExitInfo&&) = delete;
-  ~ExitInfo() = default;
-
-  struct SerializeInfo {
-    AliasedBufferIndex fields;
-  };
-  SerializeInfo Serialize(v8::Local<v8::Context> context,
-                          v8::SnapshotCreator* creator);
-  void Deserialize(v8::Local<v8::Context> context);
-
-  enum Fields { kExitCode = 0, kHasExitCode, kFieldsCount };
-
- private:
-  friend class Environment;  // So we can call the constructor.
-  explicit ExitInfo(v8::Isolate* isolate, const SerializeInfo* info);
-
-  AliasedInt32Array fields_;
-};
-
-class TrackingTraceStateObserver :
-    public v8::TracingController::TraceStateObserver {
+class TrackingTraceStateObserver
+    : public v8::TracingController::TraceStateObserver {
  public:
   explicit TrackingTraceStateObserver(Environment* env) : env_(env) {}
 
@@ -546,8 +514,7 @@ struct EnvSerializeInfo {
   TickInfo::SerializeInfo tick_info;
   ImmediateInfo::SerializeInfo immediate_info;
   performance::PerformanceState::SerializeInfo performance_state;
-  ExitInfo::SerializeInfo exit_info;
-  AliasedBufferIndex exiting;
+  AliasedBufferIndex exit_info;
   AliasedBufferIndex stream_base_state;
   AliasedBufferIndex should_abort_on_uncaught_toggle;
 
@@ -759,8 +726,6 @@ class Environment : public MemoryRetainer {
   inline AsyncHooks* async_hooks();
   inline ImmediateInfo* immediate_info();
   inline TickInfo* tick_info();
-  inline ExitInfo* exit_info();
-  inline int32_t maybe_exit_code(const int32_t default_code) const;
   inline uint64_t timer_base() const;
   inline std::shared_ptr<KVStore> env_vars();
   inline void set_env_vars(std::shared_ptr<KVStore> env_vars);
@@ -776,10 +741,12 @@ class Environment : public MemoryRetainer {
   inline void set_force_context_aware(bool value);
   inline bool force_context_aware() const;
 
-  // This is a pseudo-boolean that keeps track of whether the process is
-  // exiting.
+  // This contains fields that are a pseudo-boolean that keeps track of whether
+  // the process is exiting, an integer representing the process exit code, and
+  // a pseudo-boolean to indicate whether the exit code is undefined.
+  inline AliasedInt32Array& exit_info();
   inline void set_exiting(bool value);
-  inline AliasedUint32Array& exiting();
+  inline int32_t maybe_exit_code(const int32_t default_code) const;
 
   // This stores whether the --abort-on-uncaught-exception flag was passed
   // to Node.
@@ -1089,7 +1056,6 @@ class Environment : public MemoryRetainer {
   AsyncHooks async_hooks_;
   ImmediateInfo immediate_info_;
   TickInfo tick_info_;
-  ExitInfo exit_info_;
   const uint64_t timer_base_;
   std::shared_ptr<KVStore> env_vars_;
   bool printed_error_ = false;
@@ -1137,8 +1103,8 @@ class Environment : public MemoryRetainer {
   uint32_t script_id_counter_ = 0;
   uint32_t function_id_counter_ = 0;
 
-  // TODO(daeyeon): merge into `exit_info_`
-  AliasedUint32Array exiting_;
+  enum ExitInfoFields { kExiting = 0, kExitCode, kHasExitCode };
+  AliasedInt32Array exit_info_;
 
   AliasedUint32Array should_abort_on_uncaught_toggle_;
   int should_not_abort_scope_counter_ = 0;

src/env_properties.h

@@ -25,7 +25,6 @@
   V(napi_type_tag, "node:napi:type_tag")                                       \
   V(napi_wrapper, "node:napi:wrapper")                                         \
   V(untransferable_object_private_symbol, "node:untransferableObject")         \
-  V(exiting_aliased_Uint32Array, "node:exiting_aliased_Uint32Array")           \
   V(exit_info_private_symbol, "node:exit_info_private_symbol")
 
 // Symbols are per-isolate primitives but Environment proxies them

src/node_internals.h

@@ -414,8 +414,6 @@ std::ostream& operator<<(std::ostream& output,
 std::ostream& operator<<(std::ostream& output,
                          const AsyncHooks::SerializeInfo& d);
 std::ostream& operator<<(std::ostream& output, const SnapshotMetadata& d);
-std::ostream& operator<<(std::ostream& output,
-                         const ExitInfo::SerializeInfo& d);
 
 namespace performance {
 std::ostream& operator<<(std::ostream& output,

src/node_process_object.cc

@@ -92,20 +92,11 @@ MaybeLocal<Object> CreateProcessObject(Realm* realm) {
     return MaybeLocal<Object>();
   }
 
-  // process[exiting_aliased_Uint32Array]
-  if (process
-          ->SetPrivate(context,
-                       realm->env()->exiting_aliased_Uint32Array(),
-                       realm->env()->exiting().GetJSArray())
-          .IsNothing()) {
-    return {};
-  }
-
   // process[exit_info_private_symbol]
   if (process
           ->SetPrivate(context,
                        realm->env()->exit_info_private_symbol(),
-                       realm->env()->exit_info()->fields().GetJSArray())
+                       realm->env()->exit_info().GetJSArray())
           .IsNothing()) {
     return {};
   }