inspector: workers debugging

Introduce a NodeTarget inspector domain modelled after ChromeDevTools
Target domain. It notifies inspector frontend attached to a main V8
isolate when workers are starting and allows passing messages to
inspectors on their isolates. All inspector functionality is enabled on
worker isolates.

PR-URL: https://github.com/nodejs/node/pull/21364
Reviewed-By: Aleksei Koziatinskii <ak239spb@gmail.com>
Reviewed-By: Jan Krems <jan.krems@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>

1 files changed, 8 insertions, 0 deletions

diff --git a/src/inspector_agent.h b/src/inspector_agent.h
index 79ae8d4cd9..e926ccaa92 100644
--- a/src/inspector_agent.h
+++ b/src/inspector_agent.h
@@ -26,7 +26,9 @@ struct ContextInfo;
 
 namespace inspector {
 class InspectorIo;
+class ParentInspectorHandle;
 class NodeInspectorClient;
+class WorkerManager;
 
 class InspectorSession {
  public:
@@ -82,6 +84,8 @@ class Agent {
   void EnableAsyncHook();
   void DisableAsyncHook();
 
+  void AddWorkerInspector(int thread_id, const std::string& url, Agent* agent);
+
   // Called to create inspector sessions that can be used from the main thread.
   // The inspector responds by using the delegate to send messages back.
   std::unique_ptr<InspectorSession> Connect(
@@ -103,6 +107,9 @@ class Agent {
   std::shared_ptr<DebugOptions> options() { return debug_options_; }
   void ContextCreated(v8::Local<v8::Context> context, const ContextInfo& info);
 
+  // Interface for interacting with inspectors in worker threads
+  std::shared_ptr<WorkerManager> GetWorkerManager();
+
  private:
   void ToggleAsyncHook(v8::Isolate* isolate,
                        const node::Persistent<v8::Function>& fn);
@@ -112,6 +119,7 @@ class Agent {
   std::shared_ptr<NodeInspectorClient> client_;
   // Interface for transports, e.g. WebSocket server
   std::unique_ptr<InspectorIo> io_;
+  std::unique_ptr<ParentInspectorHandle> parent_handle_;
   std::string path_;
   std::shared_ptr<DebugOptions> debug_options_;