1 /* Handling of inferior events for the event loop for GDB, the GNU debugger.
2 Copyright (C) 1999, 2007, 2008 Free Software Foundation, Inc.
3 Written by Elena Zannoni <ezannoni@cygnus.com> of Cygnus Solutions.
5 This file is part of GDB.
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.
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.
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/>. */
21 #include "inferior.h" /* For fetch_inferior_event. */
22 #include "target.h" /* For enum inferior_event_type. */
23 #include "event-loop.h"
24 #include "event-top.h"
27 #include "exceptions.h"
30 static int fetch_inferior_event_wrapper (gdb_client_data client_data
);
33 inferior_event_handler_wrapper (gdb_client_data client_data
)
35 inferior_event_handler (INF_QUIT_REQ
, client_data
);
38 /* General function to handle events in the inferior. So far it just
39 takes care of detecting errors reported by select() or poll(),
40 otherwise it assumes that all is OK, and goes on reading data from
41 the fd. This however may not always be what we want to do. */
43 inferior_event_handler (enum inferior_event_type event_type
,
44 gdb_client_data client_data
)
46 struct gdb_exception e
;
51 printf_unfiltered (_("error detected from target.\n"));
52 target_async (NULL
, 0);
54 do_all_continuations (1);
55 async_enable_stdin ();
59 /* Use catch errors for now, until the inner layers of
60 fetch_inferior_event (i.e. readchar) can return meaningful
61 error status. If an error occurs while getting an event from
62 the target, just get rid of the target. */
63 if (!catch_errors (fetch_inferior_event_wrapper
,
64 client_data
, "", RETURN_MASK_ALL
))
66 target_async (NULL
, 0);
68 do_all_continuations (1);
69 async_enable_stdin ();
70 display_gdb_prompt (0);
74 case INF_EXEC_COMPLETE
:
76 /* This is the first thing to do -- so that continuations know that
77 the target is stopped. For example, command_line_handler_continuation
78 will run breakpoint commands, and if we think that the target is
79 running, we'll refuse to execute most commands. MI continuation
80 presently uses target_executing to either print or not print *stopped. */
83 /* Unregister the inferior from the event loop. This is done so that
84 when the inferior is not running we don't get distracted by
85 spurious inferior output. */
86 if (target_has_execution
)
87 target_async (NULL
, 0);
89 /* The call to async_enable_stdin below resets 'sync_execution'.
90 However, if sync_execution is 1 now, we also need to show the
91 prompt below, so save the current value. */
92 was_sync
= sync_execution
;
93 async_enable_stdin ();
95 /* If there's an error doing breakpoint commands, we don't
96 want to throw -- continuation might still do something. */
97 TRY_CATCH (e
, RETURN_MASK_ALL
)
99 bpstat_do_actions (&stop_bpstat
);
101 /* If we were doing a multi-step (eg: step n, next n), but it
102 got interrupted by a breakpoint, still do the pending
103 continuations. The continuation itself is responsible for
104 distinguishing the cases. */
105 do_all_intermediate_continuations (0);
107 do_all_continuations (0);
109 if (current_language
!= expected_language
)
111 if (language_mode
== language_mode_auto
)
113 language_info (1); /* Print what changed. */
117 /* If the continuation did not start the target again,
118 prepare for interation with the user. */
119 if (!target_executing
)
123 display_gdb_prompt (0);
127 if (exec_done_display_p
)
128 printf_unfiltered (_("completed.\n"));
133 case INF_EXEC_CONTINUE
:
134 /* Is there anything left to do for the command issued to
136 do_all_intermediate_continuations (0);
140 /* FIXME: ezannoni 1999-10-04. This call should really be a
141 target vector entry, so that it can be used for any kind of
143 async_remote_interrupt_twice (NULL
);
148 printf_unfiltered (_("Event type not recognized.\n"));
154 fetch_inferior_event_wrapper (gdb_client_data client_data
)
156 fetch_inferior_event (client_data
);