gdb/inf-loop.c

   1 /* Handling of inferior events for the event loop for GDB, the GNU debugger.
   2    Copyright (C) 1999-2017 Free Software Foundation, Inc.
   3    Written by Elena Zannoni <ezannoni@cygnus.com> of Cygnus Solutions.
   4
   5    This file is part of GDB.
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  19
  20 #include "defs.h"
  21 #include "inferior.h"
  22 #include "infrun.h"
  23 #include "event-loop.h"
  24 #include "event-top.h"
  25 #include "inf-loop.h"
  26 #include "remote.h"
  27 #include "language.h"
  28 #include "gdbthread.h"
  29 #include "continuations.h"
  30 #include "interps.h"
  31 #include "top.h"
  32 #include "observer.h"
  33
  34 /* General function to handle events in the inferior.  */
  35
  36 void
  37 inferior_event_handler (enum inferior_event_type event_type,
  38                         gdb_client_data client_data)
  39 {
  40   switch (event_type)
  41     {
  42     case INF_REG_EVENT:
  43       fetch_inferior_event (client_data);
  44       break;
  45
  46     case INF_EXEC_COMPLETE:
  47       if (!non_stop)
  48         {
  49           /* Unregister the inferior from the event loop.  This is done
  50              so that when the inferior is not running we don't get
  51              distracted by spurious inferior output.  */
  52           if (target_has_execution && target_can_async_p ())
  53             target_async (0);
  54         }
  55
  56       /* Do all continuations associated with the whole inferior (not
  57          a particular thread).  */
  58       if (!ptid_equal (inferior_ptid, null_ptid))
  59         do_all_inferior_continuations (0);
  60
  61       /* When running a command list (from a user command, say), these
  62          are only run when the command list is all done.  */
  63       if (current_ui->async)
  64         {
  65           check_frame_language_change ();
  66
  67           /* Don't propagate breakpoint commands errors.  Either we're
  68              stopping or some command resumes the inferior.  The user will
  69              be informed.  */
  70           TRY
  71             {
  72               bpstat_do_actions ();
  73             }
  74           CATCH (e, RETURN_MASK_ALL)
  75             {
  76               exception_print (gdb_stderr, e);
  77             }
  78           END_CATCH
  79         }
  80       break;
  81
  82     default:
  83       printf_unfiltered (_("Event type not recognized.\n"));
  84       break;
  85     }
  86 }