| /* Handling of inferior events for the event loop for GDB, the GNU debugger. |
| Copyright 1999 Free Software Foundation, Inc. |
| Written by Elena Zannoni <ezannoni@cygnus.com> of Cygnus Solutions. |
| |
| This file is part of GDB. |
| |
| This program is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2 of the License, or |
| (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program; if not, write to the Free Software |
| Foundation, Inc., 59 Temple Place - Suite 330, |
| Boston, MA 02111-1307, USA. */ |
| |
| #include "defs.h" |
| #include "inferior.h" /* For fetch_inferior_event. */ |
| #include "target.h" /* For enum inferior_event_type. */ |
| #include "event-loop.h" |
| #include "event-top.h" |
| #include "inf-loop.h" |
| #include "remote.h" |
| |
| static int fetch_inferior_event_wrapper (gdb_client_data client_data); |
| static void complete_execution (void); |
| |
| void |
| inferior_event_handler_wrapper (gdb_client_data client_data) |
| { |
| inferior_event_handler (INF_QUIT_REQ, client_data); |
| } |
| |
| /* General function to handle events in the inferior. So far it just |
| takes care of detecting errors reported by select() or poll(), |
| otherwise it assumes that all is OK, and goes on reading data from |
| the fd. This however may not always be what we want to do. */ |
| void |
| inferior_event_handler (enum inferior_event_type event_type, |
| gdb_client_data client_data) |
| { |
| switch (event_type) |
| { |
| case INF_ERROR: |
| printf_unfiltered ("error detected from target.\n"); |
| target_async (NULL, 0); |
| pop_target (); |
| discard_all_continuations (); |
| do_exec_error_cleanups (ALL_CLEANUPS); |
| break; |
| |
| case INF_REG_EVENT: |
| /* Use catch errors for now, until the inner layers of |
| fetch_inferior_event (i.e. readchar) can return meaningful |
| error status. If an error occurs while getting an event from |
| the target, just get rid of the target. */ |
| if (!catch_errors (fetch_inferior_event_wrapper, |
| client_data, "", RETURN_MASK_ALL)) |
| { |
| target_async (NULL, 0); |
| pop_target (); |
| discard_all_continuations (); |
| do_exec_error_cleanups (ALL_CLEANUPS); |
| display_gdb_prompt (0); |
| } |
| break; |
| |
| case INF_EXEC_COMPLETE: |
| /* Is there anything left to do for the command issued to |
| complete? */ |
| do_all_continuations (); |
| /* Reset things after target has stopped for the async commands. */ |
| complete_execution (); |
| break; |
| |
| case INF_EXEC_CONTINUE: |
| /* Is there anything left to do for the command issued to |
| complete? */ |
| do_all_intermediate_continuations (); |
| break; |
| |
| case INF_QUIT_REQ: |
| /* FIXME: ezannoni 1999-10-04. This call should really be a |
| target vector entry, so that it can be used for any kind of |
| targets. */ |
| async_remote_interrupt_twice (NULL); |
| break; |
| |
| case INF_TIMER: |
| default: |
| printf_unfiltered ("Event type not recognized.\n"); |
| break; |
| } |
| } |
| |
| static int |
| fetch_inferior_event_wrapper (gdb_client_data client_data) |
| { |
| fetch_inferior_event (client_data); |
| return 1; |
| } |
| |
| /* Reset proper settings after an asynchronous command has finished. |
| If the execution command was in synchronous mode, register stdin |
| with the event loop, and reset the prompt. */ |
| |
| static void |
| complete_execution (void) |
| { |
| target_executing = 0; |
| |
| /* Unregister the inferior from the event loop. This is done so that |
| when the inferior is not running we don't get distracted by |
| spurious inferior output. */ |
| target_async (NULL, 0); |
| |
| if (sync_execution) |
| { |
| do_exec_error_cleanups (ALL_CLEANUPS); |
| display_gdb_prompt (0); |
| } |
| else |
| { |
| if (exec_done_display_p) |
| printf_unfiltered ("completed.\n"); |
| } |
| } |