gdb/inf-loop.c

   1 /* Handling of inferior events for the event loop for GDB, the GNU debugger.
   2    Copyright (C) 1999-2025 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 "exceptions.h"
  21 #include "inferior.h"
  22 #include "infrun.h"
  23 #include "gdbsupport/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 "interps.h"
  30 #include "top.h"
  31 #include "ui.h"
  32 #include "observable.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 {
  39   switch (event_type)
  40     {
  41     case INF_REG_EVENT:
  42       fetch_inferior_event ();
  43       break;
  44
  45     case INF_EXEC_COMPLETE:
  46       if (!non_stop)
  47         {
  48           /* Unregister the inferior from the event loop.  This is done
  49              so that when the inferior is not running we don't get
  50              distracted by spurious inferior output.  */
  51           if (target_has_execution () && target_can_async_p ())
  52             target_async (false);
  53         }
  54
  55       /* Do all continuations associated with the whole inferior (not
  56          a particular thread).  */
  57       if (inferior_ptid != null_ptid)
  58         current_inferior ()->do_all_continuations ();
  59
  60       /* When running a command list (from a user command, say), these
  61          are only run when the command list is all done.  */
  62       if (current_ui->async)
  63         {
  64           check_frame_language_change ();
  65
  66           /* Don't propagate breakpoint commands errors.  Either we're
  67              stopping or some command resumes the inferior.  The user will
  68              be informed.  */
  69           try
  70             {
  71               bpstat_do_actions ();
  72             }
  73           catch (const gdb_exception_error &e)
  74             {
  75               /* If the user was running a foreground execution
  76                  command, then propagate the error so that the prompt
  77                  can be re-enabled.  Otherwise, the user already has
  78                  the prompt and is typing some unrelated command, so
  79                  just inform the user and swallow the exception.  */
  80               if (current_ui->prompt_state == PROMPT_BLOCKED)
  81                 throw;
  82               else
  83                 exception_print (gdb_stderr, e);
  84             }
  85         }
  86       break;
  87
  88     default:
  89       gdb_printf (gdb_stderr, _("Event type not recognized.\n"));
  90       break;
  91     }
  92 }