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2acceee2 | 1 | /* Handling of inferior events for the event loop for GDB, the GNU debugger. |
4c38e0a4 | 2 | Copyright (C) 1999, 2007, 2008, 2009, 2010 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")); |
d3fd5342 | 53 | pop_all_targets_above (file_stratum, 0); |
604ead4a PA |
54 | discard_all_intermediate_continuations (); |
55 | discard_all_continuations (); | |
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 | { | |
d3fd5342 | 67 | pop_all_targets_above (file_stratum, 0); |
604ead4a PA |
68 | discard_all_intermediate_continuations (); |
69 | discard_all_continuations (); | |
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 | |
e0ba6746 PA |
92 | /* Do all continuations associated with the whole inferior (not |
93 | a particular thread). */ | |
94 | if (!ptid_equal (inferior_ptid, null_ptid)) | |
95 | do_all_inferior_continuations (); | |
96 | ||
0a320680 PA |
97 | /* If we were doing a multi-step (eg: step n, next n), but it |
98 | got interrupted by a breakpoint, still do the pending | |
99 | continuations. The continuation itself is responsible for | |
02b19d84 PA |
100 | distinguishing the cases. The continuations are allowed to |
101 | touch the inferior memory, e.g. to remove breakpoints, so run | |
102 | them before running breakpoint commands, which may resume the | |
103 | target. */ | |
95e54da7 PA |
104 | if (non_stop |
105 | && target_has_execution | |
106 | && !ptid_equal (inferior_ptid, null_ptid)) | |
107 | do_all_intermediate_continuations_thread (inferior_thread ()); | |
108 | else | |
109 | do_all_intermediate_continuations (); | |
0a320680 | 110 | |
02b19d84 PA |
111 | /* Always finish the previous command before running any |
112 | breakpoint commands. Any stop cancels the previous command. | |
113 | E.g. a "finish" or "step-n" command interrupted by an | |
114 | unrelated breakpoint is canceled. */ | |
95e54da7 PA |
115 | if (non_stop |
116 | && target_has_execution | |
117 | && !ptid_equal (inferior_ptid, null_ptid)) | |
118 | do_all_continuations_thread (inferior_thread ()); | |
119 | else | |
120 | do_all_continuations (); | |
32c1e744 | 121 | |
02b19d84 PA |
122 | if (current_language != expected_language |
123 | && language_mode == language_mode_auto) | |
124 | language_info (1); /* Print what changed. */ | |
125 | ||
126 | /* Don't propagate breakpoint commands errors. Either we're | |
127 | stopping or some command resumes the inferior. The user will | |
128 | be informed. */ | |
129 | TRY_CATCH (e, RETURN_MASK_ALL) | |
32c1e744 | 130 | { |
347bddb7 | 131 | bpstat_do_actions (); |
32c1e744 VP |
132 | } |
133 | ||
7b0e8051 PA |
134 | if (!was_sync |
135 | && exec_done_display_p | |
136 | && (ptid_equal (inferior_ptid, null_ptid) | |
137 | || !is_running (inferior_ptid))) | |
4f8d22e3 | 138 | printf_unfiltered (_("completed.\n")); |
2acceee2 JM |
139 | break; |
140 | ||
c2d11a7d JM |
141 | case INF_EXEC_CONTINUE: |
142 | /* Is there anything left to do for the command issued to | |
143 | complete? */ | |
95e54da7 PA |
144 | |
145 | if (non_stop) | |
146 | do_all_intermediate_continuations_thread (inferior_thread ()); | |
147 | else | |
148 | do_all_intermediate_continuations (); | |
c2d11a7d JM |
149 | break; |
150 | ||
b18392ef PA |
151 | case INF_QUIT_REQ: |
152 | /* FIXME: ezannoni 1999-10-04. This call should really be a | |
153 | target vector entry, so that it can be used for any kind of | |
154 | targets. */ | |
155 | async_remote_interrupt_twice (NULL); | |
2df3850c JM |
156 | break; |
157 | ||
2acceee2 JM |
158 | case INF_TIMER: |
159 | default: | |
a3f17187 | 160 | printf_unfiltered (_("Event type not recognized.\n")); |
2acceee2 JM |
161 | break; |
162 | } | |
163 | } | |
164 | ||
165 | static int | |
166 | fetch_inferior_event_wrapper (gdb_client_data client_data) | |
167 | { | |
168 | fetch_inferior_event (client_data); | |
169 | return 1; | |
170 | } |