gdb/inf-loop.c

   1 /* Handling of inferior events for the event loop for GDB, the GNU debugger.
   2    Copyright (C) 1999-2016 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 "target.h"             /* For enum inferior_event_type.  */
  24 #include "event-loop.h"
  25 #include "event-top.h"
  26 #include "inf-loop.h"
  27 #include "remote.h"
  28 #include "language.h"
  29 #include "gdbthread.h"
  30 #include "continuations.h"
  31 #include "interps.h"
  32 #include "top.h"
  33 #include "observer.h"
  34
  35 /* General function to handle events in the inferior.  */
  36
  37 void
  38 inferior_event_handler (enum inferior_event_type event_type,
  39                         gdb_client_data client_data)
  40 {
  41   switch (event_type)
  42     {
  43     case INF_REG_EVENT:
  44       fetch_inferior_event (client_data);
  45       break;
  46
  47     case INF_EXEC_COMPLETE:
  48       if (!non_stop)
  49         {
  50           /* Unregister the inferior from the event loop.  This is done
  51              so that when the inferior is not running we don't get
  52              distracted by spurious inferior output.  */
  53           if (target_has_execution && target_can_async_p ())
  54             target_async (0);
  55         }
  56
  57       /* Do all continuations associated with the whole inferior (not
  58          a particular thread).  */
  59       if (!ptid_equal (inferior_ptid, null_ptid))
  60         do_all_inferior_continuations (0);
  61
  62       /* When running a command list (from a user command, say), these
  63          are only run when the command list is all done.  */
  64       if (interpreter_async)
  65         {
  66           check_frame_language_change ();
  67
  68           /* Don't propagate breakpoint commands errors.  Either we're
  69              stopping or some command resumes the inferior.  The user will
  70              be informed.  */
  71           TRY
  72             {
  73               bpstat_do_actions ();
  74             }
  75           CATCH (e, RETURN_MASK_ALL)
  76             {
  77               exception_print (gdb_stderr, e);
  78             }
  79           END_CATCH
  80         }
  81       break;
  82
  83     default:
  84       printf_unfiltered (_("Event type not recognized.\n"));
  85       break;
  86     }
  87 }