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2acceee2 | 1 | /* Handling of inferior events for the event loop for GDB, the GNU debugger. |
9b254dd1 | 2 | Copyright (C) 1999, 2007, 2008 Free Software Foundation, Inc. |
2acceee2 JM |
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 | |
a9762ec7 | 9 | the Free Software Foundation; either version 3 of the License, or |
2acceee2 JM |
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 | |
a9762ec7 | 18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
2acceee2 JM |
19 | |
20 | #include "defs.h" | |
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" | |
25 | #include "inf-loop.h" | |
b18392ef | 26 | #include "remote.h" |
60250e8b | 27 | #include "exceptions.h" |
32c1e744 | 28 | #include "language.h" |
8ea051c5 | 29 | #include "gdbthread.h" |
2acceee2 JM |
30 | |
31 | static int fetch_inferior_event_wrapper (gdb_client_data client_data); | |
2acceee2 | 32 | |
2df3850c JM |
33 | void |
34 | inferior_event_handler_wrapper (gdb_client_data client_data) | |
35 | { | |
36 | inferior_event_handler (INF_QUIT_REQ, client_data); | |
37 | } | |
38 | ||
2acceee2 JM |
39 | /* General function to handle events in the inferior. So far it just |
40 | takes care of detecting errors reported by select() or poll(), | |
41 | otherwise it assumes that all is OK, and goes on reading data from | |
42 | the fd. This however may not always be what we want to do. */ | |
43 | void | |
44 | inferior_event_handler (enum inferior_event_type event_type, | |
45 | gdb_client_data client_data) | |
46 | { | |
fcfb8b02 | 47 | struct gdb_exception e; |
32c1e744 | 48 | int was_sync = 0; |
2acceee2 JM |
49 | switch (event_type) |
50 | { | |
51 | case INF_ERROR: | |
a3f17187 | 52 | printf_unfiltered (_("error detected from target.\n")); |
2acceee2 JM |
53 | target_async (NULL, 0); |
54 | pop_target (); | |
f107f563 | 55 | do_all_continuations (1); |
712af3be | 56 | async_enable_stdin (); |
2acceee2 JM |
57 | break; |
58 | ||
59 | case INF_REG_EVENT: | |
60 | /* Use catch errors for now, until the inner layers of | |
61 | fetch_inferior_event (i.e. readchar) can return meaningful | |
62 | error status. If an error occurs while getting an event from | |
63 | the target, just get rid of the target. */ | |
64 | if (!catch_errors (fetch_inferior_event_wrapper, | |
65 | client_data, "", RETURN_MASK_ALL)) | |
66 | { | |
67 | target_async (NULL, 0); | |
68 | pop_target (); | |
f107f563 | 69 | do_all_continuations (1); |
712af3be | 70 | async_enable_stdin (); |
2acceee2 JM |
71 | display_gdb_prompt (0); |
72 | } | |
73 | break; | |
74 | ||
75 | case INF_EXEC_COMPLETE: | |
94cc34af PA |
76 | |
77 | if (!non_stop) | |
78 | { | |
79 | /* Unregister the inferior from the event loop. This is done | |
80 | so that when the inferior is not running we don't get | |
81 | distracted by spurious inferior output. */ | |
82 | if (target_has_execution) | |
83 | target_async (NULL, 0); | |
84 | } | |
32c1e744 | 85 | |
712af3be VP |
86 | /* The call to async_enable_stdin below resets 'sync_execution'. |
87 | However, if sync_execution is 1 now, we also need to show the | |
88 | prompt below, so save the current value. */ | |
32c1e744 | 89 | was_sync = sync_execution; |
712af3be | 90 | async_enable_stdin (); |
32c1e744 | 91 | |
0a320680 PA |
92 | /* If we were doing a multi-step (eg: step n, next n), but it |
93 | got interrupted by a breakpoint, still do the pending | |
94 | continuations. The continuation itself is responsible for | |
02b19d84 PA |
95 | distinguishing the cases. The continuations are allowed to |
96 | touch the inferior memory, e.g. to remove breakpoints, so run | |
97 | them before running breakpoint commands, which may resume the | |
98 | target. */ | |
f107f563 | 99 | do_all_intermediate_continuations (0); |
0a320680 | 100 | |
02b19d84 PA |
101 | /* Always finish the previous command before running any |
102 | breakpoint commands. Any stop cancels the previous command. | |
103 | E.g. a "finish" or "step-n" command interrupted by an | |
104 | unrelated breakpoint is canceled. */ | |
f107f563 | 105 | do_all_continuations (0); |
32c1e744 | 106 | |
02b19d84 PA |
107 | if (current_language != expected_language |
108 | && language_mode == language_mode_auto) | |
109 | language_info (1); /* Print what changed. */ | |
110 | ||
111 | /* Don't propagate breakpoint commands errors. Either we're | |
112 | stopping or some command resumes the inferior. The user will | |
113 | be informed. */ | |
114 | TRY_CATCH (e, RETURN_MASK_ALL) | |
32c1e744 | 115 | { |
02b19d84 | 116 | bpstat_do_actions (&stop_bpstat); |
32c1e744 VP |
117 | } |
118 | ||
4f8d22e3 PA |
119 | if (!was_sync && !is_running (inferior_ptid) && exec_done_display_p) |
120 | printf_unfiltered (_("completed.\n")); | |
2acceee2 JM |
121 | break; |
122 | ||
c2d11a7d JM |
123 | case INF_EXEC_CONTINUE: |
124 | /* Is there anything left to do for the command issued to | |
125 | complete? */ | |
f107f563 | 126 | do_all_intermediate_continuations (0); |
c2d11a7d JM |
127 | break; |
128 | ||
b18392ef PA |
129 | case INF_QUIT_REQ: |
130 | /* FIXME: ezannoni 1999-10-04. This call should really be a | |
131 | target vector entry, so that it can be used for any kind of | |
132 | targets. */ | |
133 | async_remote_interrupt_twice (NULL); | |
2df3850c JM |
134 | break; |
135 | ||
2acceee2 JM |
136 | case INF_TIMER: |
137 | default: | |
a3f17187 | 138 | printf_unfiltered (_("Event type not recognized.\n")); |
2acceee2 JM |
139 | break; |
140 | } | |
141 | } | |
142 | ||
143 | static int | |
144 | fetch_inferior_event_wrapper (gdb_client_data client_data) | |
145 | { | |
146 | fetch_inferior_event (client_data); | |
147 | return 1; | |
148 | } |