inspector: stop dragging platform pointer

It is now easily accessible from the Environment

Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Ali Ijaz Sheikh <ofrobots@google.com>

src/inspector_agent.cc

@@ -328,8 +328,7 @@ class InspectorTimerHandle {
 
 class NodeInspectorClient : public V8InspectorClient {
  public:
-  NodeInspectorClient(node::Environment* env, node::NodePlatform* platform)
-      : env_(env), platform_(platform) {
+  explicit NodeInspectorClient(node::Environment* env) : env_(env) {
     client_ = V8Inspector::create(env->isolate(), this);
     // TODO(bnoordhuis) Make name configurable from src/node.cc.
     ContextInfo info(GetHumanReadableProcessName());
@@ -346,8 +345,9 @@ class NodeInspectorClient : public V8InspectorClient {
       return;
     terminated_ = false;
     running_nested_loop_ = true;
+    MultiIsolatePlatform* platform = env_->isolate_data()->platform();
     while ((ignore_terminated || !terminated_) && waitForFrontendEvent()) {
-      while (platform_->FlushForegroundTasks(env_->isolate())) {}
+      while (platform->FlushForegroundTasks(env_->isolate())) {}
     }
     terminated_ = false;
     running_nested_loop_ = false;
@@ -514,7 +514,6 @@ class NodeInspectorClient : public V8InspectorClient {
 
  private:
   node::Environment* env_;
-  node::NodePlatform* platform_;
   bool terminated_ = false;
   bool running_nested_loop_ = false;
   std::unique_ptr<V8Inspector> client_;
@@ -524,25 +523,17 @@ class NodeInspectorClient : public V8InspectorClient {
   bool events_dispatched_ = false;
 };
 
-Agent::Agent(Environment* env) : parent_env_(env),
-                                 client_(nullptr),
-                                 platform_(nullptr),
-                                 pending_enable_async_hook_(false),
-                                 pending_disable_async_hook_(false) {}
+Agent::Agent(Environment* env) : parent_env_(env) {}
 
 // Destructor needs to be defined here in implementation file as the header
 // does not have full definition of some classes.
 Agent::~Agent() {
 }
 
-bool Agent::Start(node::NodePlatform* platform, const char* path,
-                  const DebugOptions& options) {
+bool Agent::Start(const char* path, const DebugOptions& options) {
   path_ = path == nullptr ? "" : path;
   debug_options_ = options;
-  client_ =
-      std::shared_ptr<NodeInspectorClient>(
-          new NodeInspectorClient(parent_env_, platform));
-  platform_ = platform;
+  client_ = std::make_shared<NodeInspectorClient>(parent_env_);
   CHECK_EQ(0, uv_async_init(uv_default_loop(),
                             &start_io_thread_async,
                             StartIoThreadAsyncCallback));
@@ -565,8 +556,7 @@ bool Agent::StartIoThread(bool wait_for_connect) {
   CHECK_NOT_NULL(client_);
 
   io_ = std::unique_ptr<InspectorIo>(
-      new InspectorIo(parent_env_, platform_, path_, debug_options_,
-                      wait_for_connect));
+      new InspectorIo(parent_env_, path_, debug_options_, wait_for_connect));
   if (!io_->Start()) {
     client_.reset();
     return false;
@@ -716,7 +706,8 @@ void Agent::RequestIoThreadStart() {
   // for IO events)
   uv_async_send(&start_io_thread_async);
   v8::Isolate* isolate = parent_env_->isolate();
-  platform_->CallOnForegroundThread(isolate, new StartIoTask(this));
+  v8::Platform* platform = parent_env_->isolate_data()->platform();
+  platform->CallOnForegroundThread(isolate, new StartIoTask(this));
   isolate->RequestInterrupt(StartIoInterrupt, this);
   uv_async_send(&start_io_thread_async);
 }

src/inspector_agent.h

@@ -50,8 +50,7 @@ class Agent {
   ~Agent();
 
   // Create client_, may create io_ if option enabled
-  bool Start(node::NodePlatform* platform, const char* path,
-             const DebugOptions& options);
+  bool Start(const char* path, const DebugOptions& options);
   // Stop and destroy io_
   void Stop();
 
@@ -108,12 +107,11 @@ class Agent {
   node::Environment* parent_env_;
   std::shared_ptr<NodeInspectorClient> client_;
   std::unique_ptr<InspectorIo> io_;
-  v8::Platform* platform_;
   std::string path_;
   DebugOptions debug_options_;
 
-  bool pending_enable_async_hook_;
-  bool pending_disable_async_hook_;
+  bool pending_enable_async_hook_ = false;
+  bool pending_disable_async_hook_ = false;
   node::Persistent<v8::Function> enable_async_hook_function_;
   node::Persistent<v8::Function> disable_async_hook_function_;
 };

src/inspector_io.cc

@@ -162,11 +162,11 @@ class DispatchMessagesTask : public v8::Task {
   Agent* agent_;
 };
 
-InspectorIo::InspectorIo(Environment* env, v8::Platform* platform,
-                         const std::string& path, const DebugOptions& options,
-                         bool wait_for_connect)
+InspectorIo::InspectorIo(Environment* env, const std::string& path,
+                         const DebugOptions& options, bool wait_for_connect)
                          : options_(options), thread_(), state_(State::kNew),
-                           parent_env_(env), thread_req_(), platform_(platform),
+                           parent_env_(env), thread_req_(),
+                           platform_(parent_env_->isolate_data()->platform()),
                            dispatching_messages_(false), script_name_(path),
                            wait_for_connect_(wait_for_connect), port_(-1),
                            id_(GenerateID()) {

src/inspector_io.h

@@ -53,9 +53,8 @@ enum class TransportAction {
 
 class InspectorIo {
  public:
-  InspectorIo(node::Environment* env, v8::Platform* platform,
-              const std::string& path, const DebugOptions& options,
-              bool wait_for_connect);
+  InspectorIo(node::Environment* env, const std::string& path,
+              const DebugOptions& options, bool wait_for_connect);
 
   ~InspectorIo();
   // Start the inspector agent thread, waiting for it to initialize,
@@ -142,7 +141,8 @@ class InspectorIo {
   // Note that this will live while the async is being closed - likely, past
   // the parent object lifespan
   std::pair<uv_async_t, Agent*>* main_thread_req_;
-  v8::Platform* platform_;
+  // Will be used to post tasks from another thread
+  v8::Platform* const platform_;
 
   // Message queues
   ConditionVariable incoming_message_cond_;

src/node.cc

@@ -320,7 +320,7 @@ static struct {
     // Inspector agent can't fail to start, but if it was configured to listen
     // right away on the websocket port and fails to bind/etc, this will return
     // false.
-    return env->inspector_agent()->Start(platform_, script_path, options);
+    return env->inspector_agent()->Start(script_path, options);
   }
 
   bool InspectorStarted(Environment* env) {

src/node.h

@@ -225,6 +225,10 @@ class Environment;
 class MultiIsolatePlatform : public v8::Platform {
  public:
   virtual ~MultiIsolatePlatform() { }
+  // Returns true if work was dispatched or executed. New tasks that are
+  // posted during flushing of the queue are postponed until the next
+  // flushing.
+  virtual bool FlushForegroundTasks(v8::Isolate* isolate) = 0;
   virtual void DrainBackgroundTasks(v8::Isolate* isolate) = 0;
   virtual void CancelPendingDelayedTasks(v8::Isolate* isolate) = 0;
 

src/node_platform.h

@@ -133,11 +133,7 @@ class NodePlatform : public MultiIsolatePlatform {
   double MonotonicallyIncreasingTime() override;
   double CurrentClockTimeMillis() override;
   v8::TracingController* GetTracingController() override;
-
-  // Returns true if work was dispatched or executed. New tasks that are
-  // posted during flushing of the queue are postponed until the next
-  // flushing.
-  bool FlushForegroundTasks(v8::Isolate* isolate);
+  bool FlushForegroundTasks(v8::Isolate* isolate) override;
 
   void RegisterIsolate(IsolateData* isolate_data, uv_loop_t* loop) override;
   void UnregisterIsolate(IsolateData* isolate_data) override;