gdbsupport, gdb: give names to observers

Give a name to each observer, this will help produce more meaningful
debug message.

gdbsupport/ChangeLog:

	* observable.h (class observable) <struct observer> <observer>:
	Add name parameter.
	<name>: New field.
	<attach>: Add name parameter, update all callers.

Change-Id: Ie0cc4664925215b8d2b09e026011b7803549fba0

4 files changed, 16 insertions, 14 deletions

diff --git a/gdb/tui/tui-hooks.c b/gdb/tui/tui-hooks.c
index 2d7660acade..52519aecf17 100644
--- a/gdb/tui/tui-hooks.c
+++ b/gdb/tui/tui-hooks.c
@@ -222,7 +222,7 @@ static void
 attach_or_detach (T &observable, typename T::func_type func, bool attach)
 {
   if (attach)
-    observable.attach (func, tui_observers_token);
+    observable.attach (func, tui_observers_token, "tui-hooks");
   else
     observable.detach (tui_observers_token);
 }
@@ -282,5 +282,5 @@ void
 _initialize_tui_hooks ()
 {
   /* Install the permanent hooks.  */
-  gdb::observers::new_objfile.attach (tui_new_objfile_hook);
+  gdb::observers::new_objfile.attach (tui_new_objfile_hook, "tui-hooks");
 }
diff --git a/gdb/tui/tui-interp.c b/gdb/tui/tui-interp.c
index f70e1a7b4c2..aaa353c5146 100644
--- a/gdb/tui/tui-interp.c
+++ b/gdb/tui/tui-interp.c
@@ -343,14 +343,16 @@ _initialize_tui_interp ()
     }
 
   /* If changing this, remember to update cli-interp.c as well.  */
-  gdb::observers::normal_stop.attach (tui_on_normal_stop);
-  gdb::observers::signal_received.attach (tui_on_signal_received);
-  gdb::observers::end_stepping_range.attach (tui_on_end_stepping_range);
-  gdb::observers::signal_exited.attach (tui_on_signal_exited);
-  gdb::observers::exited.attach (tui_on_exited);
-  gdb::observers::no_history.attach (tui_on_no_history);
-  gdb::observers::sync_execution_done.attach (tui_on_sync_execution_done);
-  gdb::observers::command_error.attach (tui_on_command_error);
+  gdb::observers::normal_stop.attach (tui_on_normal_stop, "tui-interp");
+  gdb::observers::signal_received.attach (tui_on_signal_received, "tui-interp");
+  gdb::observers::end_stepping_range.attach (tui_on_end_stepping_range,
+					     "tui-interp");
+  gdb::observers::signal_exited.attach (tui_on_signal_exited, "tui-interp");
+  gdb::observers::exited.attach (tui_on_exited, "tui-interp");
+  gdb::observers::no_history.attach (tui_on_no_history, "tui-interp");
+  gdb::observers::sync_execution_done.attach (tui_on_sync_execution_done,
+					      "tui-interp");
+  gdb::observers::command_error.attach (tui_on_command_error, "tui-interp");
   gdb::observers::user_selected_context_changed.attach
-    (tui_on_user_selected_context_changed);
+    (tui_on_user_selected_context_changed, "tui-interp");
 }
diff --git a/gdb/tui/tui-win.c b/gdb/tui/tui-win.c
index c73d129d1c7..17682b022a3 100644
--- a/gdb/tui/tui-win.c
+++ b/gdb/tui/tui-win.c
@@ -1120,6 +1120,6 @@ the line numbers and uses less horizontal space."),
 			   tui_set_compact_source, tui_show_compact_source,
 			   &tui_setlist, &tui_showlist);
 
-  tui_border_style.changed.attach (tui_rehighlight_all);
-  tui_active_border_style.changed.attach (tui_rehighlight_all);
+  tui_border_style.changed.attach (tui_rehighlight_all, "tui-win");
+  tui_active_border_style.changed.attach (tui_rehighlight_all, "tui-win");
 }
diff --git a/gdb/tui/tui-winsource.c b/gdb/tui/tui-winsource.c
index 058079e208a..908d9015bf1 100644
--- a/gdb/tui/tui-winsource.c
+++ b/gdb/tui/tui-winsource.c
@@ -294,7 +294,7 @@ tui_source_window_base::tui_source_window_base ()
 
   gdb::observers::source_styling_changed.attach
     (std::bind (&tui_source_window::style_changed, this),
-     m_observable);
+     m_observable, "tui-winsource");
 }
 
 tui_source_window_base::~tui_source_window_base ()