inspector: supported NodeRuntime domain in worker

NodeRuntime domain was introduced to give inspector client way to
fetch captured information before Node process is gone. We need
similar capability for work.

With current protocol inspector client can force worker to wait
on start by passing waitForDebuggerOnStart flag to NodeWorker.enable
method. So client has some time to setup environment, e.g. start
profiler. At the same time there is no way to prevent worker from
being terminated. So we can start capturing profile but we can not
reliably get captured data back.

This PR implemented NodeRuntime.notifyWhenWaitingForDisconnect
method for worker. When NodeRuntime.waitingForDisconnect notification
is enabled, worker will wait for explicit NodeWorker.detach call.

With this PR worker tooling story is nicely aligned with main thread
tooling story. The only difference is that main thread by default is
waiting for disconnect but worker thread is not waiting.

Issue: https://github.com/nodejs/node/issues/27677

PR-URL: https://github.com/nodejs/node/pull/27706
Reviewed-By: Eugene Ostroukhov <eostroukhov@google.com>

1 files changed, 12 insertions, 6 deletions

diff --git a/src/inspector_agent.cc b/src/inspector_agent.cc
index 12e62d3e2b2..09593297e05 100644
--- a/src/inspector_agent.cc
+++ b/src/inspector_agent.cc
@@ -472,8 +472,8 @@ class NodeInspectorClient : public V8InspectorClient {
     runMessageLoop();
   }
 
-  void waitForIoShutdown() {
-    waiting_for_io_shutdown_ = true;
+  void waitForSessionsDisconnect() {
+    waiting_for_sessions_disconnect_ = true;
     runMessageLoop();
   }
 
@@ -548,6 +548,8 @@ class NodeInspectorClient : public V8InspectorClient {
       }
       contextDestroyed(env_->context());
     }
+    if (waiting_for_sessions_disconnect_ && !is_main_)
+      waiting_for_sessions_disconnect_ = false;
   }
 
   void dispatchMessageFromFrontend(int session_id, const StringView& message) {
@@ -678,8 +680,9 @@ class NodeInspectorClient : public V8InspectorClient {
   bool shouldRunMessageLoop() {
     if (waiting_for_frontend_)
       return true;
-    if (waiting_for_io_shutdown_ || waiting_for_resume_)
+    if (waiting_for_sessions_disconnect_ || waiting_for_resume_) {
       return hasConnectedSessions();
+    }
     return false;
   }
 
@@ -723,7 +726,7 @@ class NodeInspectorClient : public V8InspectorClient {
   int next_session_id_ = 1;
   bool waiting_for_resume_ = false;
   bool waiting_for_frontend_ = false;
-  bool waiting_for_io_shutdown_ = false;
+  bool waiting_for_sessions_disconnect_ = false;
   // Allows accessing Inspector from non-main threads
   std::unique_ptr<MainThreadInterface> interface_;
   std::shared_ptr<WorkerManager> worker_manager_;
@@ -819,11 +822,14 @@ void Agent::WaitForDisconnect() {
     fprintf(stderr, "Waiting for the debugger to disconnect...\n");
     fflush(stderr);
   }
-  if (!client_->notifyWaitingForDisconnect())
+  if (!client_->notifyWaitingForDisconnect()) {
     client_->contextDestroyed(parent_env_->context());
+  } else if (is_worker) {
+    client_->waitForSessionsDisconnect();
+  }
   if (io_ != nullptr) {
     io_->StopAcceptingNewConnections();
-    client_->waitForIoShutdown();
+    client_->waitForSessionsDisconnect();
   }
 }