[14/30] gdb: add interp::on_inferior_appeared method

diff --git a/gdb/inferior.c b/gdb/inferior.c
index a70bbe412471..46d418a2be39 100644
--- a/gdb/inferior.c
+++ b/gdb/inferior.c
@@ -345,6 +345,15 @@  detach_inferior (inferior *inf)
 		target_pid_to_str (ptid_t (pid)).c_str ());
 }
 
+/* Notify interpreters and observers that inferior INF appeared.  */
+
+static void
+notify_inferior_appeared (inferior *inf)
+{
+  interps_notify_inferior_appeared (inf);
+  gdb::observers::inferior_appeared.notify (inf);
+}
+
 void
 inferior_appeared (struct inferior *inf, int pid)
 {
@@ -358,7 +367,7 @@  inferior_appeared (struct inferior *inf, int pid)
   inf->has_exit_code = false;
   inf->exit_code = 0;
 
-  gdb::observers::inferior_appeared.notify (inf);
+  notify_inferior_appeared (inf);
 }
 
 struct inferior *
diff --git a/gdb/interps.c b/gdb/interps.c
index f64869953088..ed33df2efd4c 100644
--- a/gdb/interps.c
+++ b/gdb/interps.c
@@ -470,6 +470,14 @@  interps_notify_inferior_added (inferior *inf)
   interps_notify (&interp::on_inferior_added, inf);
 }
 
+/* See interps.h.  */
+
+void
+interps_notify_inferior_appeared (inferior *inf)
+{
+  interps_notify (&interp::on_inferior_appeared, inf);
+}
+
 /* This just adds the "interpreter-exec" command.  */
 void _initialize_interpreter ();
 void
diff --git a/gdb/interps.h b/gdb/interps.h
index 0c73a1a7ce8a..09edaaeb0036 100644
--- a/gdb/interps.h
+++ b/gdb/interps.h
@@ -122,9 +122,12 @@  class interp : public intrusive_list_node<interp>
   /* Notify the interpreter that thread T has exited.  */
   virtual void on_thread_exited (thread_info *, int silent) {}
 
-  /* Notify the intepreter that inferior INF was added.  */
+  /* Notify the interpreter that inferior INF was added.  */
   virtual void on_inferior_added (inferior *inf) {}
 
+  /* Notify the interpreter that inferior INF was started or attached.  */
+  virtual void on_inferior_appeared (inferior *inf) {}
+
 private:
   /* The memory for this is static, it comes from literal strings (e.g. "cli").  */
   const char *m_name;
@@ -242,9 +245,12 @@  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);
 
-/* Notify all intepreters that inferior INF was added.  */
+/* Notify all interpreters that inferior INF was added.  */
 extern void interps_notify_inferior_added (inferior *inf);
 
+/* Notify all interpreters that inferior INF was started or attached.  */
+extern void interps_notify_inferior_appeared (inferior *inf);
+
 /* 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 c4903d7db3b7..3f0aaa7702a5 100644
--- a/gdb/mi/mi-interp.c
+++ b/gdb/mi/mi-interp.c
@@ -62,7 +62,6 @@  static void mi_remove_notify_hooks (void);
 
 static void mi_record_changed (struct inferior*, int, const char *,
 			       const char *);
-static void mi_inferior_appeared (struct inferior *inf);
 static void mi_inferior_exit (struct inferior *inf);
 static void mi_inferior_removed (struct inferior *inf);
 static void mi_on_resume (ptid_t ptid);
@@ -368,24 +367,15 @@  mi_interp::on_inferior_added (inferior *inf)
   gdb_flush (this->event_channel);
 }
 
-static void
-mi_inferior_appeared (struct inferior *inf)
+void
+mi_interp::on_inferior_appeared (inferior *inf)
 {
-  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 ();
+  target_terminal::scoped_restore_terminal_state term_state;
+  target_terminal::ours_for_output ();
 
-      gdb_printf (mi->event_channel,
-		  "thread-group-started,id=\"i%d\",pid=\"%d\"",
-		  inf->num, inf->pid);
-      gdb_flush (mi->event_channel);
-    }
+  gdb_printf (this->event_channel, "thread-group-started,id=\"i%d\",pid=\"%d\"",
+	      inf->num, inf->pid);
+  gdb_flush (this->event_channel);
 }
 
 static void
@@ -1139,7 +1129,6 @@  _initialize_mi_interp ()
   interp_factory_register (INTERP_MI4, mi_interp_factory);
   interp_factory_register (INTERP_MI, mi_interp_factory);
 
-  gdb::observers::inferior_appeared.attach (mi_inferior_appeared, "mi-interp");
   gdb::observers::inferior_exit.attach (mi_inferior_exit, "mi-interp");
   gdb::observers::inferior_removed.attach (mi_inferior_removed, "mi-interp");
   gdb::observers::record_changed.attach (mi_record_changed, "mi-interp");
diff --git a/gdb/mi/mi-interp.h b/gdb/mi/mi-interp.h
index 1be0d8771cf5..3872577121cf 100644
--- a/gdb/mi/mi-interp.h
+++ b/gdb/mi/mi-interp.h
@@ -53,6 +53,7 @@  class mi_interp final : public interp
   void on_new_thread (thread_info *t) override;
   void on_thread_exited (thread_info *t, int silent) override;
   void on_inferior_added (inferior *inf) override;
+  void on_inferior_appeared (inferior *inf) override;
 
   /* MI's output channels */
   mi_console_file *out;