[12/30] gdb: add interp::on_thread_exited method

diff --git a/gdb/interps.c b/gdb/interps.c
index 896484530aad..be11fd835189 100644
--- a/gdb/interps.c
+++ b/gdb/interps.c
@@ -454,6 +454,14 @@  interps_notify_new_thread (thread_info *t)
   interps_notify (&interp::on_new_thread, t);
 }
 
+/* See interps.h.  */
+
+void
+interps_notify_thread_exited (thread_info *t, int silent)
+{
+  interps_notify (&interp::on_thread_exited, t, silent);
+}
+
 /* This just adds the "interpreter-exec" command.  */
 void _initialize_interpreter ();
 void
diff --git a/gdb/interps.h b/gdb/interps.h
index 05ea91e0cdaa..cd099381d002 100644
--- a/gdb/interps.h
+++ b/gdb/interps.h
@@ -118,6 +118,9 @@  class interp : public intrusive_list_node<interp>
   /* Notify the interpreter that thread T has been created.  */
   virtual void on_new_thread (thread_info *t) {}
 
+  /* Notify the interpreter that thread T has exited.  */
+  virtual void on_thread_exited (thread_info *, int silent) {}
+
 private:
   /* The memory for this is static, it comes from literal strings (e.g. "cli").  */
   const char *m_name;
@@ -232,6 +235,9 @@  extern void interps_notify_user_selected_context_changed
 /* Notify all interpreters that thread T has been created.  */
 extern void interps_notify_new_thread (thread_info *t);
 
+/* Notify all interpreters that thread T has exited.  */
+extern void interps_notify_thread_exited (thread_info *t, int silent);
+
 /* well-known interpreters */
 #define INTERP_CONSOLE		"console"
 #define INTERP_MI2             "mi2"
diff --git a/gdb/mi/mi-interp.c b/gdb/mi/mi-interp.c
index 42ec1a7b522e..a1960b14046d 100644
--- a/gdb/mi/mi-interp.c
+++ b/gdb/mi/mi-interp.c
@@ -60,7 +60,6 @@  static int mi_interp_query_hook (const char *ctlstr, va_list ap)
 static void mi_insert_notify_hooks (void);
 static void mi_remove_notify_hooks (void);
 
-static void mi_thread_exit (struct thread_info *t, int silent);
 static void mi_record_changed (struct inferior*, int, const char *,
 			       const char *);
 static void mi_inferior_added (struct inferior *inf);
@@ -316,23 +315,14 @@  mi_interp::on_new_thread (thread_info *t)
   gdb_flush (this->event_channel);
 }
 
-static void
-mi_thread_exit (struct thread_info *t, int silent)
+void
+mi_interp::on_thread_exited (thread_info *t, int silent)
 {
-  SWITCH_THRU_ALL_UIS ()
-    {
-      struct mi_interp *mi = as_mi_interp (top_level_interpreter ());
-
-      if (mi == NULL)
-	continue;
-
-      target_terminal::scoped_restore_terminal_state term_state;
-      target_terminal::ours_for_output ();
-      gdb_printf (mi->event_channel,
-		  "thread-exited,id=\"%d\",group-id=\"i%d\"",
-		  t->global_num, t->inf->num);
-      gdb_flush (mi->event_channel);
-    }
+  target_terminal::scoped_restore_terminal_state term_state;
+  target_terminal::ours_for_output ();
+  gdb_printf (this->event_channel, "thread-exited,id=\"%d\",group-id=\"i%d\"",
+	      t->global_num, t->inf->num);
+  gdb_flush (this->event_channel);
 }
 
 /* Emit notification on changing the state of record.  */
@@ -1178,7 +1168,6 @@  _initialize_mi_interp ()
   interp_factory_register (INTERP_MI4, mi_interp_factory);
   interp_factory_register (INTERP_MI, mi_interp_factory);
 
-  gdb::observers::thread_exit.attach (mi_thread_exit, "mi-interp");
   gdb::observers::inferior_added.attach (mi_inferior_added, "mi-interp");
   gdb::observers::inferior_appeared.attach (mi_inferior_appeared, "mi-interp");
   gdb::observers::inferior_exit.attach (mi_inferior_exit, "mi-interp");
diff --git a/gdb/mi/mi-interp.h b/gdb/mi/mi-interp.h
index 77fa708397ac..443ec03465a7 100644
--- a/gdb/mi/mi-interp.h
+++ b/gdb/mi/mi-interp.h
@@ -51,6 +51,7 @@  class mi_interp final : public interp
   void on_command_error () override;
   void on_user_selected_context_changed (user_selected_what selection) override;
   void on_new_thread (thread_info *t) override;
+  void on_thread_exited (thread_info *t, int silent) override;
 
   /* MI's output channels */
   mi_console_file *out;
diff --git a/gdb/thread.c b/gdb/thread.c
index 223ba1df96d9..b7b5d9fdd993 100644
--- a/gdb/thread.c
+++ b/gdb/thread.c
@@ -191,6 +191,15 @@  clear_thread_inferior_resources (struct thread_info *tp)
   clear_inline_frame_state (tp);
 }
 
+/* Notify interpreters and observers that thread T has exited.  */
+
+static void
+notify_thread_exited (thread_info *t, int silent)
+{
+  interps_notify_thread_exited (t, silent);
+  gdb::observers::thread_exit.notify (t, silent);
+}
+
 /* See gdbthread.h.  */
 
 void
@@ -213,7 +222,7 @@  set_thread_exited (thread_info *tp, bool silent)
       if (proc_target != nullptr)
 	proc_target->maybe_remove_resumed_with_pending_wait_status (tp);
 
-      gdb::observers::thread_exit.notify (tp, silent);
+      notify_thread_exited (tp, silent);
 
       /* Tag it as exited.  */
       tp->state = THREAD_EXITED;