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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" |
2acceee2 JM |
29 | |
30 | static int fetch_inferior_event_wrapper (gdb_client_data client_data); | |
2acceee2 | 31 | |
2df3850c JM |
32 | void |
33 | inferior_event_handler_wrapper (gdb_client_data client_data) | |
34 | { | |
35 | inferior_event_handler (INF_QUIT_REQ, client_data); | |
36 | } | |
37 | ||
2acceee2 JM |
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. */ | |
42 | void | |
43 | inferior_event_handler (enum inferior_event_type event_type, | |
44 | gdb_client_data client_data) | |
45 | { | |
32c1e744 | 46 | int was_sync = 0; |
2acceee2 JM |
47 | switch (event_type) |
48 | { | |
49 | case INF_ERROR: | |
a3f17187 | 50 | printf_unfiltered (_("error detected from target.\n")); |
2acceee2 JM |
51 | target_async (NULL, 0); |
52 | pop_target (); | |
53 | discard_all_continuations (); | |
54 | do_exec_error_cleanups (ALL_CLEANUPS); | |
55 | break; | |
56 | ||
57 | case INF_REG_EVENT: | |
58 | /* Use catch errors for now, until the inner layers of | |
59 | fetch_inferior_event (i.e. readchar) can return meaningful | |
60 | error status. If an error occurs while getting an event from | |
61 | the target, just get rid of the target. */ | |
62 | if (!catch_errors (fetch_inferior_event_wrapper, | |
63 | client_data, "", RETURN_MASK_ALL)) | |
64 | { | |
65 | target_async (NULL, 0); | |
66 | pop_target (); | |
67 | discard_all_continuations (); | |
68 | do_exec_error_cleanups (ALL_CLEANUPS); | |
69 | display_gdb_prompt (0); | |
70 | } | |
71 | break; | |
72 | ||
73 | case INF_EXEC_COMPLETE: | |
32c1e744 VP |
74 | |
75 | /* This is the first thing to do -- so that continuations know that | |
76 | the target is stopped. For example, command_line_handler_continuation | |
77 | will run breakpoint commands, and if we think that the target is | |
78 | running, we'll refuse to execute most commands. MI continuation | |
79 | presently uses target_executing to either print or not print *stopped. */ | |
80 | target_executing = 0; | |
81 | ||
82 | /* Unregister the inferior from the event loop. This is done so that | |
83 | when the inferior is not running we don't get distracted by | |
84 | spurious inferior output. */ | |
85 | if (target_has_execution) | |
86 | target_async (NULL, 0); | |
87 | ||
88 | /* Calls to do_exec_error_cleanup below will call async_enable_stdin, | |
89 | and that resets 'sync_execution'. However, if we were running | |
90 | in sync execution mode, we also need to display the prompt. */ | |
91 | was_sync = sync_execution; | |
92 | ||
93 | if (was_sync) | |
94 | do_exec_error_cleanups (ALL_CLEANUPS); | |
95 | ||
2acceee2 | 96 | do_all_continuations (); |
32c1e744 VP |
97 | |
98 | if (current_language != expected_language) | |
99 | { | |
100 | if (language_mode == language_mode_auto) | |
101 | { | |
102 | language_info (1); /* Print what changed. */ | |
103 | } | |
104 | } | |
105 | ||
106 | /* If the continuation did not start the target again, | |
107 | prepare for interation with the user. */ | |
108 | if (!target_executing) | |
109 | { | |
110 | if (was_sync) | |
111 | { | |
112 | display_gdb_prompt (0); | |
113 | } | |
114 | else | |
115 | { | |
116 | if (exec_done_display_p) | |
117 | printf_unfiltered (_("completed.\n")); | |
118 | } | |
119 | } | |
2acceee2 JM |
120 | break; |
121 | ||
c2d11a7d JM |
122 | case INF_EXEC_CONTINUE: |
123 | /* Is there anything left to do for the command issued to | |
124 | complete? */ | |
125 | do_all_intermediate_continuations (); | |
126 | break; | |
127 | ||
b18392ef PA |
128 | case INF_QUIT_REQ: |
129 | /* FIXME: ezannoni 1999-10-04. This call should really be a | |
130 | target vector entry, so that it can be used for any kind of | |
131 | targets. */ | |
132 | async_remote_interrupt_twice (NULL); | |
2df3850c JM |
133 | break; |
134 | ||
2acceee2 JM |
135 | case INF_TIMER: |
136 | default: | |
a3f17187 | 137 | printf_unfiltered (_("Event type not recognized.\n")); |
2acceee2 JM |
138 | break; |
139 | } | |
140 | } | |
141 | ||
142 | static int | |
143 | fetch_inferior_event_wrapper (gdb_client_data client_data) | |
144 | { | |
145 | fetch_inferior_event (client_data); | |
146 | return 1; | |
147 | } |