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[/] [openrisc/] [trunk/] [gnu-src/] [gdb-6.8/] [gdb/] [inf-loop.c] - Blame information for rev 157

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1 24 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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