Make sure target supports non-stop.

        * infcmd.c (run_command_1, attach_command): If non-stop mode
        is requested, verify the target supports it.
        * linux-nat.c (linux_nat_supports_non_stop): New.
        (linux_nat_add_target): Register the above.
        * target.c (find_default_supports_non_stop)
        (target_supports_non_stop): New.
        (init_dummy_target): Register find_default_supports_non_stop.
        * target.h (struct target_ops): New field to_supports_non_stop.
        (target_supports_non_stop): New.

1 files changed, 6 insertions, 0 deletions

diff --git a/gdb/infcmd.c b/gdb/infcmd.c
index 82d4710..02ec980 100644
--- a/gdb/infcmd.c
+++ b/gdb/infcmd.c
@@ -503,6 +503,9 @@ run_command_1 (char *args, int from_tty, int tbreak_at_main)
 
   exec_file = (char *) get_exec_file (0);
 
+  if (non_stop && !target_supports_non_stop ())
+    error (_("The target does not support running in non-stop mode."));
+
   /* We keep symbols from add-symbol-file, on the grounds that the
      user might want to add some symbols before running the program
      (right?).  But sometimes (dynamic loading where the user manually
@@ -2020,6 +2023,9 @@ attach_command (char *args, int from_tty)
      this function should probably be moved into target_pre_inferior.  */
   target_pre_inferior (from_tty);
 
+  if (non_stop && !target_supports_non_stop ())
+    error (_("Cannot attach to this target in non-stop mode"));
+
   if (args)
     {
       async_exec = strip_bg_char (&args);