check_for_thread_db ();
}
+static void
+check_pid_namespace_match (void)
+{
+ /* Check is only relevant for local targets targets. */
+ if (target_can_run (¤t_target))
+ {
+ /* 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. */
+ char *our_pid_ns = linux_proc_pid_get_ns (getpid (), "pid");
+ char *inferior_pid_ns = linux_proc_pid_get_ns (
+ ptid_get_pid (inferior_ptid), "pid");
+
+ if (our_pid_ns != NULL && inferior_pid_ns != NULL
+ && strcmp (our_pid_ns, inferior_pid_ns) != 0)
+ {
+ warning (_ ("Target and debugger are in different PID "
+ "namespaces; thread lists and other data are "
+ "likely unreliable"));
+ }
+
+ xfree (our_pid_ns);
+ xfree (inferior_pid_ns);
+ }
+}
+
/* This function is called via the inferior_created observer.
This handles the case of debugging statically linked executables. */
static void
thread_db_inferior_created (struct target_ops *target, int from_tty)
{
+ check_pid_namespace_match ();
check_for_thread_db ();
}