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2acceee2 | 1 | /* Handling of inferior events for the event loop for GDB, the GNU debugger. |
7b6bb8da JB |
2 | Copyright (C) 1999, 2007, 2008, 2009, 2010, 2011 |
3 | Free Software Foundation, Inc. | |
2acceee2 JM |
4 | Written by Elena Zannoni <ezannoni@cygnus.com> of Cygnus Solutions. |
5 | ||
6 | This file is part of GDB. | |
7 | ||
8 | This program is free software; you can redistribute it and/or modify | |
9 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 10 | the Free Software Foundation; either version 3 of the License, or |
2acceee2 JM |
11 | (at your option) any later version. |
12 | ||
13 | This program is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
1777feb0 | 19 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
2acceee2 JM |
20 | |
21 | #include "defs.h" | |
1777feb0 MS |
22 | #include "inferior.h" /* For fetch_inferior_event. */ |
23 | #include "target.h" /* For enum inferior_event_type. */ | |
2acceee2 JM |
24 | #include "event-loop.h" |
25 | #include "event-top.h" | |
26 | #include "inf-loop.h" | |
b18392ef | 27 | #include "remote.h" |
60250e8b | 28 | #include "exceptions.h" |
32c1e744 | 29 | #include "language.h" |
8ea051c5 | 30 | #include "gdbthread.h" |
2acceee2 JM |
31 | |
32 | static int fetch_inferior_event_wrapper (gdb_client_data client_data); | |
2acceee2 | 33 | |
2df3850c JM |
34 | void |
35 | inferior_event_handler_wrapper (gdb_client_data client_data) | |
36 | { | |
37 | inferior_event_handler (INF_QUIT_REQ, client_data); | |
38 | } | |
39 | ||
1777feb0 | 40 | /* General function to handle events in the inferior. So far it just |
2acceee2 JM |
41 | takes care of detecting errors reported by select() or poll(), |
42 | otherwise it assumes that all is OK, and goes on reading data from | |
1777feb0 | 43 | the fd. This however may not always be what we want to do. */ |
2acceee2 JM |
44 | void |
45 | inferior_event_handler (enum inferior_event_type event_type, | |
46 | gdb_client_data client_data) | |
47 | { | |
fcfb8b02 | 48 | struct gdb_exception e; |
32c1e744 | 49 | int was_sync = 0; |
abbb1732 | 50 | |
2acceee2 JM |
51 | switch (event_type) |
52 | { | |
53 | case INF_ERROR: | |
a3f17187 | 54 | printf_unfiltered (_("error detected from target.\n")); |
d3fd5342 | 55 | pop_all_targets_above (file_stratum, 0); |
604ead4a PA |
56 | discard_all_intermediate_continuations (); |
57 | discard_all_continuations (); | |
712af3be | 58 | async_enable_stdin (); |
2acceee2 JM |
59 | break; |
60 | ||
61 | case INF_REG_EVENT: | |
62 | /* Use catch errors for now, until the inner layers of | |
63 | fetch_inferior_event (i.e. readchar) can return meaningful | |
64 | error status. If an error occurs while getting an event from | |
1777feb0 | 65 | the target, just get rid of the target. */ |
2acceee2 JM |
66 | if (!catch_errors (fetch_inferior_event_wrapper, |
67 | client_data, "", RETURN_MASK_ALL)) | |
68 | { | |
d3fd5342 | 69 | pop_all_targets_above (file_stratum, 0); |
604ead4a PA |
70 | discard_all_intermediate_continuations (); |
71 | discard_all_continuations (); | |
712af3be | 72 | async_enable_stdin (); |
2acceee2 JM |
73 | display_gdb_prompt (0); |
74 | } | |
75 | break; | |
76 | ||
77 | case INF_EXEC_COMPLETE: | |
94cc34af PA |
78 | |
79 | if (!non_stop) | |
80 | { | |
1777feb0 | 81 | /* Unregister the inferior from the event loop. This is done |
94cc34af PA |
82 | so that when the inferior is not running we don't get |
83 | distracted by spurious inferior output. */ | |
84 | if (target_has_execution) | |
85 | target_async (NULL, 0); | |
86 | } | |
32c1e744 | 87 | |
712af3be VP |
88 | /* The call to async_enable_stdin below resets 'sync_execution'. |
89 | However, if sync_execution is 1 now, we also need to show the | |
90 | prompt below, so save the current value. */ | |
32c1e744 | 91 | was_sync = sync_execution; |
712af3be | 92 | async_enable_stdin (); |
32c1e744 | 93 | |
e0ba6746 PA |
94 | /* Do all continuations associated with the whole inferior (not |
95 | a particular thread). */ | |
96 | if (!ptid_equal (inferior_ptid, null_ptid)) | |
97 | do_all_inferior_continuations (); | |
98 | ||
0a320680 PA |
99 | /* If we were doing a multi-step (eg: step n, next n), but it |
100 | got interrupted by a breakpoint, still do the pending | |
101 | continuations. The continuation itself is responsible for | |
02b19d84 PA |
102 | distinguishing the cases. The continuations are allowed to |
103 | touch the inferior memory, e.g. to remove breakpoints, so run | |
104 | them before running breakpoint commands, which may resume the | |
105 | target. */ | |
95e54da7 PA |
106 | if (non_stop |
107 | && target_has_execution | |
108 | && !ptid_equal (inferior_ptid, null_ptid)) | |
109 | do_all_intermediate_continuations_thread (inferior_thread ()); | |
110 | else | |
111 | do_all_intermediate_continuations (); | |
0a320680 | 112 | |
02b19d84 PA |
113 | /* Always finish the previous command before running any |
114 | breakpoint commands. Any stop cancels the previous command. | |
115 | E.g. a "finish" or "step-n" command interrupted by an | |
116 | unrelated breakpoint is canceled. */ | |
95e54da7 PA |
117 | if (non_stop |
118 | && target_has_execution | |
119 | && !ptid_equal (inferior_ptid, null_ptid)) | |
120 | do_all_continuations_thread (inferior_thread ()); | |
121 | else | |
122 | do_all_continuations (); | |
32c1e744 | 123 | |
02b19d84 PA |
124 | if (current_language != expected_language |
125 | && language_mode == language_mode_auto) | |
126 | language_info (1); /* Print what changed. */ | |
127 | ||
128 | /* Don't propagate breakpoint commands errors. Either we're | |
129 | stopping or some command resumes the inferior. The user will | |
130 | be informed. */ | |
131 | TRY_CATCH (e, RETURN_MASK_ALL) | |
32c1e744 | 132 | { |
347bddb7 | 133 | bpstat_do_actions (); |
32c1e744 VP |
134 | } |
135 | ||
7b0e8051 PA |
136 | if (!was_sync |
137 | && exec_done_display_p | |
138 | && (ptid_equal (inferior_ptid, null_ptid) | |
139 | || !is_running (inferior_ptid))) | |
4f8d22e3 | 140 | printf_unfiltered (_("completed.\n")); |
2acceee2 JM |
141 | break; |
142 | ||
c2d11a7d JM |
143 | case INF_EXEC_CONTINUE: |
144 | /* Is there anything left to do for the command issued to | |
1777feb0 | 145 | complete? */ |
95e54da7 PA |
146 | |
147 | if (non_stop) | |
148 | do_all_intermediate_continuations_thread (inferior_thread ()); | |
149 | else | |
150 | do_all_intermediate_continuations (); | |
c2d11a7d JM |
151 | break; |
152 | ||
b18392ef | 153 | case INF_QUIT_REQ: |
1777feb0 | 154 | /* FIXME: ezannoni 1999-10-04. This call should really be a |
b18392ef | 155 | target vector entry, so that it can be used for any kind of |
1777feb0 | 156 | targets. */ |
b18392ef | 157 | async_remote_interrupt_twice (NULL); |
2df3850c JM |
158 | break; |
159 | ||
2acceee2 JM |
160 | case INF_TIMER: |
161 | default: | |
a3f17187 | 162 | printf_unfiltered (_("Event type not recognized.\n")); |
2acceee2 JM |
163 | break; |
164 | } | |
165 | } | |
166 | ||
167 | static int | |
168 | fetch_inferior_event_wrapper (gdb_client_data client_data) | |
169 | { | |
170 | fetch_inferior_event (client_data); | |
171 | return 1; | |
172 | } |