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jeremybenn |
/* Handling of inferior events for the event loop for GDB, the GNU debugger.
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Copyright (C) 1999, 2007, 2008 Free Software Foundation, Inc.
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Written by Elena Zannoni <ezannoni@cygnus.com> of Cygnus Solutions.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include "defs.h"
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#include "inferior.h" /* For fetch_inferior_event. */
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#include "target.h" /* For enum inferior_event_type. */
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#include "event-loop.h"
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#include "event-top.h"
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#include "inf-loop.h"
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#include "remote.h"
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#include "exceptions.h"
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static int fetch_inferior_event_wrapper (gdb_client_data client_data);
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static void complete_execution (void);
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void
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inferior_event_handler_wrapper (gdb_client_data client_data)
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{
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inferior_event_handler (INF_QUIT_REQ, client_data);
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}
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/* General function to handle events in the inferior. So far it just
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takes care of detecting errors reported by select() or poll(),
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otherwise it assumes that all is OK, and goes on reading data from
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the fd. This however may not always be what we want to do. */
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void
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inferior_event_handler (enum inferior_event_type event_type,
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gdb_client_data client_data)
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{
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switch (event_type)
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{
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case INF_ERROR:
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printf_unfiltered (_("error detected from target.\n"));
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target_async (NULL, 0);
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pop_target ();
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discard_all_continuations ();
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do_exec_error_cleanups (ALL_CLEANUPS);
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break;
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case INF_REG_EVENT:
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/* Use catch errors for now, until the inner layers of
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fetch_inferior_event (i.e. readchar) can return meaningful
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error status. If an error occurs while getting an event from
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the target, just get rid of the target. */
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if (!catch_errors (fetch_inferior_event_wrapper,
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client_data, "", RETURN_MASK_ALL))
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{
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target_async (NULL, 0);
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pop_target ();
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discard_all_continuations ();
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do_exec_error_cleanups (ALL_CLEANUPS);
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display_gdb_prompt (0);
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}
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break;
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case INF_EXEC_COMPLETE:
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/* Is there anything left to do for the command issued to
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complete? */
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do_all_continuations ();
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/* Reset things after target has stopped for the async commands. */
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complete_execution ();
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break;
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case INF_EXEC_CONTINUE:
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/* Is there anything left to do for the command issued to
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complete? */
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do_all_intermediate_continuations ();
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break;
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case INF_QUIT_REQ:
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/* FIXME: ezannoni 1999-10-04. This call should really be a
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target vector entry, so that it can be used for any kind of
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targets. */
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async_remote_interrupt_twice (NULL);
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break;
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case INF_TIMER:
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default:
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printf_unfiltered (_("Event type not recognized.\n"));
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break;
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}
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}
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static int
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fetch_inferior_event_wrapper (gdb_client_data client_data)
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{
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fetch_inferior_event (client_data);
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return 1;
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}
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/* Reset proper settings after an asynchronous command has finished.
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If the execution command was in synchronous mode, register stdin
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with the event loop, and reset the prompt. */
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static void
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complete_execution (void)
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{
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target_executing = 0;
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/* Unregister the inferior from the event loop. This is done so that
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when the inferior is not running we don't get distracted by
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spurious inferior output. */
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target_async (NULL, 0);
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if (sync_execution)
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{
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do_exec_error_cleanups (ALL_CLEANUPS);
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display_gdb_prompt (0);
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}
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else
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{
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if (exec_done_display_p)
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printf_unfiltered (_("completed.\n"));
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}
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}
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