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, 29 insertions, 18 deletions

diff --git a/gdb/python/py-breakpoint.c b/gdb/python/py-breakpoint.c
index 9650bd0..b414071 100644
--- a/gdb/python/py-breakpoint.c
+++ b/gdb/python/py-breakpoint.c
@@ -1125,9 +1125,12 @@ gdbpy_initialize_breakpoints (void)
 			      (PyObject *) &breakpoint_object_type) < 0)
     return -1;
 
-  gdb::observers::breakpoint_created.attach (gdbpy_breakpoint_created);
-  gdb::observers::breakpoint_deleted.attach (gdbpy_breakpoint_deleted);
-  gdb::observers::breakpoint_modified.attach (gdbpy_breakpoint_modified);
+  gdb::observers::breakpoint_created.attach (gdbpy_breakpoint_created,
+					     "py-breakpoint");
+  gdb::observers::breakpoint_deleted.attach (gdbpy_breakpoint_deleted,
+					     "py-breakpoint");
+  gdb::observers::breakpoint_modified.attach (gdbpy_breakpoint_modified,
+					      "py-breakpoint");
 
   /* Add breakpoint types constants.  */
   for (i = 0; pybp_codes[i].name; ++i)
diff --git a/gdb/python/py-finishbreakpoint.c b/gdb/python/py-finishbreakpoint.c
index 38b4cc6..d2a1ec4 100644
--- a/gdb/python/py-finishbreakpoint.c
+++ b/gdb/python/py-finishbreakpoint.c
@@ -417,8 +417,10 @@ gdbpy_initialize_finishbreakpoints (void)
 			      (PyObject *) &finish_breakpoint_object_type) < 0)
     return -1;
 
-  gdb::observers::normal_stop.attach (bpfinishpy_handle_stop);
-  gdb::observers::inferior_exit.attach (bpfinishpy_handle_exit);
+  gdb::observers::normal_stop.attach (bpfinishpy_handle_stop,
+				      "py-finishbreakpoint");
+  gdb::observers::inferior_exit.attach (bpfinishpy_handle_exit,
+					"py-finishbreakpoint");
 
   return 0;
 }
diff --git a/gdb/python/py-inferior.c b/gdb/python/py-inferior.c
index a3d5952..c2861cc 100644
--- a/gdb/python/py-inferior.c
+++ b/gdb/python/py-inferior.c
@@ -904,18 +904,23 @@ gdbpy_initialize_inferior (void)
   infpy_inf_data_key =
     register_inferior_data_with_cleanup (NULL, py_free_inferior);
 
-  gdb::observers::new_thread.attach (add_thread_object);
-  gdb::observers::thread_exit.attach (delete_thread_object);
-  gdb::observers::normal_stop.attach (python_on_normal_stop);
-  gdb::observers::target_resumed.attach (python_on_resume);
-  gdb::observers::inferior_call_pre.attach (python_on_inferior_call_pre);
-  gdb::observers::inferior_call_post.attach (python_on_inferior_call_post);
-  gdb::observers::memory_changed.attach (python_on_memory_change);
-  gdb::observers::register_changed.attach (python_on_register_change);
-  gdb::observers::inferior_exit.attach (python_inferior_exit);
-  gdb::observers::new_objfile.attach (python_new_objfile);
-  gdb::observers::inferior_added.attach (python_new_inferior);
-  gdb::observers::inferior_removed.attach (python_inferior_deleted);
+  gdb::observers::new_thread.attach (add_thread_object, "py-inferior");
+  gdb::observers::thread_exit.attach (delete_thread_object, "py-inferior");
+  gdb::observers::normal_stop.attach (python_on_normal_stop, "py-inferior");
+  gdb::observers::target_resumed.attach (python_on_resume, "py-inferior");
+  gdb::observers::inferior_call_pre.attach (python_on_inferior_call_pre,
+					    "py-inferior");
+  gdb::observers::inferior_call_post.attach (python_on_inferior_call_post,
+					     "py-inferior");
+  gdb::observers::memory_changed.attach (python_on_memory_change,
+					 "py-inferior");
+  gdb::observers::register_changed.attach (python_on_register_change,
+					   "py-inferior");
+  gdb::observers::inferior_exit.attach (python_inferior_exit, "py-inferior");
+  gdb::observers::new_objfile.attach (python_new_objfile, "py-inferior");
+  gdb::observers::inferior_added.attach (python_new_inferior, "py-inferior");
+  gdb::observers::inferior_removed.attach (python_inferior_deleted,
+					   "py-inferior");
 
   membuf_object_type.tp_new = PyType_GenericNew;
   if (PyType_Ready (&membuf_object_type) < 0)
diff --git a/gdb/python/py-unwind.c b/gdb/python/py-unwind.c
index f0574eb..5dc8d33 100644
--- a/gdb/python/py-unwind.c
+++ b/gdb/python/py-unwind.c
@@ -630,7 +630,8 @@ gdbpy_initialize_unwind (void)
 	&setdebuglist, &showdebuglist);
   pyuw_gdbarch_data
       = gdbarch_data_register_post_init (pyuw_gdbarch_data_init);
-  gdb::observers::architecture_changed.attach (pyuw_on_new_gdbarch);
+  gdb::observers::architecture_changed.attach (pyuw_on_new_gdbarch,
+					       "py-unwind");
 
   if (PyType_Ready (&pending_frame_object_type) < 0)
     return -1;