[23/30] gdb: add interp::on_tsv_created method

diff --git a/gdb/interps.c b/gdb/interps.c
index 01fa44ceddcf..9d736fc4fcf2 100644
--- a/gdb/interps.c
+++ b/gdb/interps.c
@@ -535,6 +535,14 @@  interps_notify_traceframe_changed (int tfnum, int tpnum)
   interps_notify (&interp::on_traceframe_changed, tfnum, tpnum);
 }
 
+/* See interps.h.  */
+
+void
+interps_notify_tsv_created (const trace_state_variable *tsv)
+{
+  interps_notify (&interp::on_tsv_created, tsv);
+}
+
 /* This just adds the "interpreter-exec" command.  */
 void _initialize_interpreter ();
 void
diff --git a/gdb/interps.h b/gdb/interps.h
index 3b8814616964..de1af0708b47 100644
--- a/gdb/interps.h
+++ b/gdb/interps.h
@@ -32,6 +32,7 @@  class completion_tracker;
 struct thread_info;
 struct inferior;
 struct so_list;
+struct trace_state_variable;
 
 typedef struct interp *(*interp_factory_func) (const char *name);
 
@@ -156,6 +157,9 @@  class interp : public intrusive_list_node<interp>
   /* Notify the interpreter that the selected traceframe changed.  */
   virtual void on_traceframe_changed (int tfnum, int tpnum) {}
 
+  /* Notify the interpreter that trace state variable TSV was created.  */
+  virtual void on_tsv_created (const trace_state_variable *tsv) {}
+
 private:
   /* The memory for this is static, it comes from literal strings (e.g. "cli").  */
   const char *m_name;
@@ -314,6 +318,9 @@  extern void interps_notify_solib_unloaded (so_list *so);
    the tracepoint associated with this traceframe is TPNUM.  */
 extern void interps_notify_traceframe_changed (int tfnum, int tpnum);
 
+/* Notify all interpreters that trace state variable TSV was created.  */
+extern void interps_notify_tsv_created (const trace_state_variable *tsv);
+
 /* 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 832199d8cd97..509f84d82a13 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_tsv_created (const struct trace_state_variable *tsv);
 static void mi_tsv_deleted (const struct trace_state_variable *tsv);
 static void mi_tsv_modified (const struct trace_state_variable *tsv);
 static void mi_breakpoint_created (struct breakpoint *b);
@@ -512,27 +511,17 @@  mi_interp::on_traceframe_changed (int tfnum, int tpnum)
   gdb_flush (this->event_channel);
 }
 
-/* Emit notification on creating a trace state variable.  */
-
-static void
-mi_tsv_created (const struct trace_state_variable *tsv)
+void
+mi_interp::on_tsv_created (const trace_state_variable *tsv)
 {
-  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, "tsv-created,"
-		  "name=\"%s\",initial=\"%s\"",
-		  tsv->name.c_str (), plongest (tsv->initial_value));
+  gdb_printf (this->event_channel, "tsv-created,"
+	      "name=\"%s\",initial=\"%s\"",
+	      tsv->name.c_str (), plongest (tsv->initial_value));
 
-      gdb_flush (mi->event_channel);
-    }
+  gdb_flush (this->event_channel);
 }
 
 /* Emit notification on deleting a trace state variable.  */
@@ -1043,7 +1032,6 @@  _initialize_mi_interp ()
   interp_factory_register (INTERP_MI4, mi_interp_factory);
   interp_factory_register (INTERP_MI, mi_interp_factory);
 
-  gdb::observers::tsv_created.attach (mi_tsv_created, "mi-interp");
   gdb::observers::tsv_deleted.attach (mi_tsv_deleted, "mi-interp");
   gdb::observers::tsv_modified.attach (mi_tsv_modified, "mi-interp");
   gdb::observers::breakpoint_created.attach (mi_breakpoint_created,
diff --git a/gdb/mi/mi-interp.h b/gdb/mi/mi-interp.h
index af335df8344c..ee4807b93f4b 100644
--- a/gdb/mi/mi-interp.h
+++ b/gdb/mi/mi-interp.h
@@ -63,6 +63,7 @@  class mi_interp final : public interp
   void on_solib_unloaded (so_list *so) override;
   void on_about_to_proceed () override;
   void on_traceframe_changed (int tfnum, int tpnum) override;
+  void on_tsv_created (const trace_state_variable *tsv) override;
 
   /* MI's output channels */
   mi_console_file *out;
diff --git a/gdb/observable.c b/gdb/observable.c
index 4e9967f5637a..0715b6eb696d 100644
--- a/gdb/observable.c
+++ b/gdb/observable.c
@@ -62,7 +62,6 @@  DEFINE_OBSERVABLE (memory_changed);
 DEFINE_OBSERVABLE (before_prompt);
 DEFINE_OBSERVABLE (gdb_datadir_changed);
 DEFINE_OBSERVABLE (command_param_changed);
-DEFINE_OBSERVABLE (tsv_created);
 DEFINE_OBSERVABLE (tsv_deleted);
 DEFINE_OBSERVABLE (tsv_modified);
 DEFINE_OBSERVABLE (inferior_call_pre);
diff --git a/gdb/observable.h b/gdb/observable.h
index ee70f2bd4dee..46a027979e75 100644
--- a/gdb/observable.h
+++ b/gdb/observable.h
@@ -190,9 +190,6 @@  extern observable<> gdb_datadir_changed;
 extern observable<const char */* param */, const char */* value */>
     command_param_changed;
 
-/* The new trace state variable TSV is created.  */
-extern observable<const struct trace_state_variable */* tsv */> tsv_created;
-
 /* The trace state variable TSV is deleted.  If TSV is NULL, all
    trace state variables are deleted.  */
 extern observable<const struct trace_state_variable */* tsv */> tsv_deleted;
diff --git a/gdb/tracepoint.c b/gdb/tracepoint.c
index 9517d144ccee..a32651cf5cc6 100644
--- a/gdb/tracepoint.c
+++ b/gdb/tracepoint.c
@@ -373,7 +373,7 @@  trace_variable_command (const char *args, int from_tty)
   tsv = create_trace_state_variable (name.c_str ());
   tsv->initial_value = initval;
 
-  gdb::observers::tsv_created.notify (tsv);
+  interps_notify_tsv_created (tsv);
 
   gdb_printf (_("Trace state variable $%s "
 		"created, with initial value %s.\n"),
@@ -3184,7 +3184,7 @@  create_tsv_from_upload (struct uploaded_tsv *utsv)
   tsv->initial_value = utsv->initial_value;
   tsv->builtin = utsv->builtin;
 
-  gdb::observers::tsv_created.notify (tsv);
+  interps_notify_tsv_created (tsv);
 
   return tsv;
 }