inspector: new API - Session.connectToMainThread

This API is designed to enable worker threads use Inspector protocol
on main thread (and other workers through NodeWorker domain).

Note that worker can cause dead lock by suspending itself. I will
work on a new API that will allow workers to be hidden from the
inspector.

Fixes: https://github.com/nodejs/node/issues/28828
PR-URL: https://github.com/nodejs/node/pull/28870
Reviewed-By: Aleksei Koziatinskii <ak239spb@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>

1 files changed, 11 insertions, 0 deletions

diff --git a/src/inspector_agent.cc b/src/inspector_agent.cc
index 1f4c42d62ca..424b09d6e1d 100644
--- a/src/inspector_agent.cc
+++ b/src/inspector_agent.cc
@@ -828,6 +828,17 @@ std::unique_ptr<InspectorSession> Agent::Connect(
       new SameThreadInspectorSession(session_id, client_));
 }
 
+std::unique_ptr<InspectorSession> Agent::ConnectToMainThread(
+    std::unique_ptr<InspectorSessionDelegate> delegate,
+    bool prevent_shutdown) {
+  CHECK_NOT_NULL(parent_handle_);
+  CHECK_NOT_NULL(client_);
+  auto thread_safe_delegate =
+      client_->getThreadHandle()->MakeDelegateThreadSafe(std::move(delegate));
+  return parent_handle_->Connect(std::move(thread_safe_delegate),
+                                 prevent_shutdown);
+}
+
 void Agent::WaitForDisconnect() {
   CHECK_NOT_NULL(client_);
   bool is_worker = parent_handle_ != nullptr;