Commit | Line | Data |
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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" |
be34f849 | 31 | #include "continuations.h" |
b4a14fd0 | 32 | #include "interps.h" |
77cce10f | 33 | #include "top.h" |
2acceee2 JM |
34 | |
35 | static int fetch_inferior_event_wrapper (gdb_client_data client_data); | |
2acceee2 | 36 | |
1777feb0 | 37 | /* General function to handle events in the inferior. So far it just |
2acceee2 JM |
38 | takes care of detecting errors reported by select() or poll(), |
39 | otherwise it assumes that all is OK, and goes on reading data from | |
1777feb0 | 40 | the fd. This however may not always be what we want to do. */ |
2acceee2 JM |
41 | void |
42 | inferior_event_handler (enum inferior_event_type event_type, | |
43 | gdb_client_data client_data) | |
44 | { | |
353d1d73 | 45 | struct cleanup *cleanup_if_error = make_bpstat_clear_actions_cleanup (); |
abbb1732 | 46 | |
2acceee2 JM |
47 | switch (event_type) |
48 | { | |
2acceee2 JM |
49 | case INF_REG_EVENT: |
50 | /* Use catch errors for now, until the inner layers of | |
51 | fetch_inferior_event (i.e. readchar) can return meaningful | |
52 | error status. If an error occurs while getting an event from | |
fa4cd53f | 53 | the target, just cancel the current command. */ |
2acceee2 JM |
54 | if (!catch_errors (fetch_inferior_event_wrapper, |
55 | client_data, "", RETURN_MASK_ALL)) | |
56 | { | |
353d1d73 | 57 | bpstat_clear_actions (); |
fa4cd53f PA |
58 | do_all_intermediate_continuations (1); |
59 | do_all_continuations (1); | |
712af3be | 60 | async_enable_stdin (); |
2acceee2 JM |
61 | display_gdb_prompt (0); |
62 | } | |
63 | break; | |
64 | ||
65 | case INF_EXEC_COMPLETE: | |
94cc34af PA |
66 | if (!non_stop) |
67 | { | |
1777feb0 | 68 | /* Unregister the inferior from the event loop. This is done |
94cc34af PA |
69 | so that when the inferior is not running we don't get |
70 | distracted by spurious inferior output. */ | |
71 | if (target_has_execution) | |
72 | target_async (NULL, 0); | |
73 | } | |
32c1e744 | 74 | |
e0ba6746 PA |
75 | /* Do all continuations associated with the whole inferior (not |
76 | a particular thread). */ | |
77 | if (!ptid_equal (inferior_ptid, null_ptid)) | |
fa4cd53f | 78 | do_all_inferior_continuations (0); |
e0ba6746 | 79 | |
0a320680 PA |
80 | /* If we were doing a multi-step (eg: step n, next n), but it |
81 | got interrupted by a breakpoint, still do the pending | |
82 | continuations. The continuation itself is responsible for | |
02b19d84 PA |
83 | distinguishing the cases. The continuations are allowed to |
84 | touch the inferior memory, e.g. to remove breakpoints, so run | |
85 | them before running breakpoint commands, which may resume the | |
86 | target. */ | |
95e54da7 PA |
87 | if (non_stop |
88 | && target_has_execution | |
89 | && !ptid_equal (inferior_ptid, null_ptid)) | |
fa4cd53f | 90 | do_all_intermediate_continuations_thread (inferior_thread (), 0); |
95e54da7 | 91 | else |
fa4cd53f | 92 | do_all_intermediate_continuations (0); |
0a320680 | 93 | |
02b19d84 PA |
94 | /* Always finish the previous command before running any |
95 | breakpoint commands. Any stop cancels the previous command. | |
96 | E.g. a "finish" or "step-n" command interrupted by an | |
97 | unrelated breakpoint is canceled. */ | |
95e54da7 PA |
98 | if (non_stop |
99 | && target_has_execution | |
100 | && !ptid_equal (inferior_ptid, null_ptid)) | |
fa4cd53f | 101 | do_all_continuations_thread (inferior_thread (), 0); |
95e54da7 | 102 | else |
fa4cd53f | 103 | do_all_continuations (0); |
32c1e744 | 104 | |
b4a14fd0 PA |
105 | /* When running a command list (from a user command, say), these |
106 | are only run when the command list is all done. */ | |
107 | if (interpreter_async) | |
32c1e744 | 108 | { |
b4a14fd0 PA |
109 | volatile struct gdb_exception e; |
110 | ||
77cce10f | 111 | check_frame_language_change (); |
b4a14fd0 PA |
112 | |
113 | /* Don't propagate breakpoint commands errors. Either we're | |
114 | stopping or some command resumes the inferior. The user will | |
115 | be informed. */ | |
116 | TRY_CATCH (e, RETURN_MASK_ALL) | |
117 | { | |
118 | bpstat_do_actions (); | |
119 | } | |
120 | exception_print (gdb_stderr, e); | |
32c1e744 | 121 | } |
2acceee2 JM |
122 | break; |
123 | ||
c2d11a7d JM |
124 | case INF_EXEC_CONTINUE: |
125 | /* Is there anything left to do for the command issued to | |
1777feb0 | 126 | complete? */ |
95e54da7 PA |
127 | |
128 | if (non_stop) | |
fa4cd53f | 129 | do_all_intermediate_continuations_thread (inferior_thread (), 0); |
95e54da7 | 130 | else |
fa4cd53f | 131 | do_all_intermediate_continuations (0); |
c2d11a7d JM |
132 | break; |
133 | ||
2acceee2 JM |
134 | case INF_TIMER: |
135 | default: | |
a3f17187 | 136 | printf_unfiltered (_("Event type not recognized.\n")); |
2acceee2 JM |
137 | break; |
138 | } | |
353d1d73 JK |
139 | |
140 | discard_cleanups (cleanup_if_error); | |
2acceee2 JM |
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 | } |