Remove unused support for target-based exception catching.

* target.h (struct target_ops): Delete
to_enable_exception_callback and to_get_current_exception_event
members.
(target_enable_exception_callback)
(target_get_current_exception_event): Delete macros.
* target.c (update_current_target): Remove code to inherit and
default those members.
(debug_to_enable_exception_callback)
(debug_to_get_current_exception_event): Delete functions.
(setup_target_debug): Don't install those methods.
* inf-child.c (inf_child_enable_exception_callback)
(inf_child_get_current_exception_event): Delete dummy functions.
(inf_child_target): Don't install them in the target vector.
* breakpoint.h (enum bptype): Delete bp_catch_catch,
bp_catch_throw.
* breakpoint.c (cover_target_enable_exception_callback)
(ep_is_exception_catchpoint, create_exception_catchpoint): Delete
functions.
(insert_bp_location, update_breakpoints_after_exec)
(remove_breakpoint, ep_is_catchpoint, print_it_typical)
(bpstat_stop_status, bpstat_what)
(bpstat_get_triggered_catchpoints, print_one_breakpoint_location)
(user_settable_breakpoint, allocate_bp_location)
(disable_watchpoints_before_interactive_call_start)
(enable_watchpoints_after_interactive_call_stop, mention)
(delete_breakpoint, breakpoint_re_set_one, disable_command)
(enable_command): Remove exception catchpoint cases.
(catch_exception_command_1): Don't try target-based exception
handling.
* stack.c (catch_info): Call print_frame_label_vars
unconditionally.

1 files changed, 3 insertions, 16 deletions

diff --git a/gdb/stack.c b/gdb/stack.c
index c23529f..f09283f 100644
--- a/gdb/stack.c
+++ b/gdb/stack.c
@@ -1549,22 +1549,9 @@ catch_info (char *ignore, int from_tty)
 {
   struct symtab_and_line *sal;
 
-  /* Check for target support for exception handling */
-  sal = target_enable_exception_callback (EX_EVENT_CATCH, 1);
-  if (sal)
-    {
-      /* Currently not handling this.  Ideally, here we should
-         interact with the C++ runtime system to find the list of
-         active handlers, etc.  */
-      fprintf_filtered (gdb_stdout, _("\
-Info catch not supported with this target/compiler combination.\n"));
-    }
-  else
-    {
-      /* Assume g++ compiled code; old GDB 4.16 behaviour.  */
-      print_frame_label_vars (get_selected_frame (_("No frame selected.")),
-			      0, gdb_stdout);
-    }
+  /* Assume g++ compiled code; old GDB 4.16 behaviour.  */
+  print_frame_label_vars (get_selected_frame (_("No frame selected.")),
+                          0, gdb_stdout);
 }
 
 static void