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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 | { | |
fcfb8b02 | 46 | struct gdb_exception e; |
32c1e744 | 47 | int was_sync = 0; |
2acceee2 JM |
48 | switch (event_type) |
49 | { | |
50 | case INF_ERROR: | |
a3f17187 | 51 | printf_unfiltered (_("error detected from target.\n")); |
2acceee2 JM |
52 | target_async (NULL, 0); |
53 | pop_target (); | |
f107f563 | 54 | do_all_continuations (1); |
712af3be | 55 | async_enable_stdin (); |
2acceee2 JM |
56 | break; |
57 | ||
58 | case INF_REG_EVENT: | |
59 | /* Use catch errors for now, until the inner layers of | |
60 | fetch_inferior_event (i.e. readchar) can return meaningful | |
61 | error status. If an error occurs while getting an event from | |
62 | the target, just get rid of the target. */ | |
63 | if (!catch_errors (fetch_inferior_event_wrapper, | |
64 | client_data, "", RETURN_MASK_ALL)) | |
65 | { | |
66 | target_async (NULL, 0); | |
67 | pop_target (); | |
f107f563 | 68 | do_all_continuations (1); |
712af3be | 69 | async_enable_stdin (); |
2acceee2 JM |
70 | display_gdb_prompt (0); |
71 | } | |
72 | break; | |
73 | ||
74 | case INF_EXEC_COMPLETE: | |
32c1e744 VP |
75 | |
76 | /* This is the first thing to do -- so that continuations know that | |
77 | the target is stopped. For example, command_line_handler_continuation | |
78 | will run breakpoint commands, and if we think that the target is | |
79 | running, we'll refuse to execute most commands. MI continuation | |
80 | presently uses target_executing to either print or not print *stopped. */ | |
81 | target_executing = 0; | |
82 | ||
83 | /* Unregister the inferior from the event loop. This is done so that | |
84 | when the inferior is not running we don't get distracted by | |
85 | spurious inferior output. */ | |
86 | if (target_has_execution) | |
87 | target_async (NULL, 0); | |
88 | ||
712af3be VP |
89 | /* The call to async_enable_stdin below resets 'sync_execution'. |
90 | However, if sync_execution is 1 now, we also need to show the | |
91 | prompt below, so save the current value. */ | |
32c1e744 | 92 | was_sync = sync_execution; |
712af3be | 93 | async_enable_stdin (); |
32c1e744 | 94 | |
fcfb8b02 VP |
95 | /* If there's an error doing breakpoint commands, we don't |
96 | want to throw -- continuation might still do something. */ | |
97 | TRY_CATCH (e, RETURN_MASK_ALL) | |
98 | { | |
99 | bpstat_do_actions (&stop_bpstat); | |
100 | } | |
0a320680 PA |
101 | /* If we were doing a multi-step (eg: step n, next n), but it |
102 | got interrupted by a breakpoint, still do the pending | |
103 | continuations. The continuation itself is responsible for | |
104 | distinguishing the cases. */ | |
f107f563 | 105 | do_all_intermediate_continuations (0); |
0a320680 | 106 | |
f107f563 | 107 | do_all_continuations (0); |
32c1e744 VP |
108 | |
109 | if (current_language != expected_language) | |
110 | { | |
111 | if (language_mode == language_mode_auto) | |
112 | { | |
113 | language_info (1); /* Print what changed. */ | |
114 | } | |
115 | } | |
116 | ||
117 | /* If the continuation did not start the target again, | |
118 | prepare for interation with the user. */ | |
119 | if (!target_executing) | |
120 | { | |
121 | if (was_sync) | |
122 | { | |
123 | display_gdb_prompt (0); | |
124 | } | |
125 | else | |
126 | { | |
127 | if (exec_done_display_p) | |
128 | printf_unfiltered (_("completed.\n")); | |
129 | } | |
130 | } | |
2acceee2 JM |
131 | break; |
132 | ||
c2d11a7d JM |
133 | case INF_EXEC_CONTINUE: |
134 | /* Is there anything left to do for the command issued to | |
135 | complete? */ | |
f107f563 | 136 | do_all_intermediate_continuations (0); |
c2d11a7d JM |
137 | break; |
138 | ||
b18392ef PA |
139 | case INF_QUIT_REQ: |
140 | /* FIXME: ezannoni 1999-10-04. This call should really be a | |
141 | target vector entry, so that it can be used for any kind of | |
142 | targets. */ | |
143 | async_remote_interrupt_twice (NULL); | |
2df3850c JM |
144 | break; |
145 | ||
2acceee2 JM |
146 | case INF_TIMER: |
147 | default: | |
a3f17187 | 148 | printf_unfiltered (_("Event type not recognized.\n")); |
2acceee2 JM |
149 | break; |
150 | } | |
151 | } | |
152 | ||
153 | static int | |
154 | fetch_inferior_event_wrapper (gdb_client_data client_data) | |
155 | { | |
156 | fetch_inferior_event (client_data); | |
157 | return 1; | |
158 | } |