[PATCH] Warn users about mismatched PID namespaces

[Pedro Alves]

On 10/30/2014 03:07 AM, Daniel Colascione wrote:

> diff --git a/gdb/linux-thread-db.c b/gdb/linux-thread-db.c
> index 352fac1..4089417 100644
> - --- a/gdb/linux-thread-db.c
> +++ b/gdb/linux-thread-db.c
> @@ -1223,6 +1223,25 @@ thread_db_new_objfile (struct objfile *objfile)
>  static void
>  thread_db_inferior_created (struct target_ops *target, int from_tty)
>  {
> +  /* If the child is in a different PID namespace, its idea of its PID
> +     will differ from our idea of its PID.  When we scan the child's
> +     thread list, we'll mistakenly think it has no threads since the
> +     thread PID fields won't match the PID we give to
> +     libthread_db.  */

Why not give libthread_db the right PID then?

Thanks,
Pedro Alves