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

1 files changed, 3 insertions, 3 deletions

diff --git a/gdb/auxv.c b/gdb/auxv.c
index 6507df1..2bcf9f4 100644
--- a/gdb/auxv.c
+++ b/gdb/auxv.c
@@ -600,7 +600,7 @@ _initialize_auxv ()
 This is information provided by the operating system at program startup."));
 
   /* Observers used to invalidate the auxv cache when needed.  */
-  gdb::observers::inferior_exit.attach (invalidate_auxv_cache_inf);
-  gdb::observers::inferior_appeared.attach (invalidate_auxv_cache_inf);
-  gdb::observers::executable_changed.attach (invalidate_auxv_cache);
+  gdb::observers::inferior_exit.attach (invalidate_auxv_cache_inf, "auxv");
+  gdb::observers::inferior_appeared.attach (invalidate_auxv_cache_inf, "auxv");
+  gdb::observers::executable_changed.attach (invalidate_auxv_cache, "auxv");
 }