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c906108c | 1 | /* Top level stuff for GDB, the GNU debugger. |
637537d0 | 2 | |
61baf725 | 3 | Copyright (C) 1986-2017 Free Software Foundation, Inc. |
c906108c | 4 | |
c5aa993b | 5 | This file is part of GDB. |
c906108c | 6 | |
c5aa993b JM |
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 |
c5aa993b | 10 | (at your option) any later version. |
c906108c | 11 | |
c5aa993b JM |
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. | |
c906108c | 16 | |
c5aa993b | 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/>. */ |
c906108c | 19 | |
17732724 AC |
20 | #ifndef TOP_H |
21 | #define TOP_H | |
22 | ||
a74e1786 PA |
23 | #include "buffer.h" |
24 | #include "event-loop.h" | |
25 | ||
cb814510 PA |
26 | struct tl_interp_info; |
27 | ||
3b12939d PA |
28 | /* Prompt state. */ |
29 | ||
30 | enum prompt_state | |
31 | { | |
32 | /* The command line is blocked simulating synchronous execution. | |
33 | This is used to implement the foreground execution commands | |
34 | ('run', 'continue', etc.). We won't display the prompt and | |
35 | accept further commands until the execution is actually over. */ | |
36 | PROMPT_BLOCKED, | |
37 | ||
38 | /* The command finished; display the prompt before returning back to | |
39 | the top level. */ | |
40 | PROMPT_NEEDED, | |
41 | ||
42 | /* We've displayed the prompt already, ready for input. */ | |
43 | PROMPTED, | |
44 | }; | |
45 | ||
a74e1786 PA |
46 | /* All about a user interface instance. Each user interface has its |
47 | own I/O files/streams, readline state, its own top level | |
48 | interpreter (for the main UI, this is the interpreter specified | |
49 | with -i on the command line) and secondary interpreters (for | |
50 | interpreter-exec ...), etc. There's always one UI associated with | |
51 | stdin/stdout/stderr, but the user can create secondary UIs, for | |
52 | example, to create a separate MI channel on its own stdio | |
53 | streams. */ | |
54 | ||
55 | struct ui | |
56 | { | |
895b8f30 TT |
57 | /* Create a new UI. */ |
58 | ui (FILE *instream, FILE *outstream, FILE *errstream); | |
59 | ~ui (); | |
60 | ||
61 | DISABLE_COPY_AND_ASSIGN (ui); | |
62 | ||
73ab01a0 PA |
63 | /* Pointer to next in singly-linked list. */ |
64 | struct ui *next; | |
65 | ||
98d9f24e PA |
66 | /* Convenient handle (UI number). Unique across all UIs. */ |
67 | int num; | |
68 | ||
a74e1786 PA |
69 | /* The UI's command line buffer. This is to used to accumulate |
70 | input until we have a whole command line. */ | |
71 | struct buffer line_buffer; | |
72 | ||
73 | /* The callback used by the event loop whenever an event is detected | |
74 | on the UI's input file descriptor. This function incrementally | |
75 | builds a buffer where it accumulates the line read up to the | |
76 | point of invocation. In the special case in which the character | |
77 | read is newline, the function invokes the INPUT_HANDLER callback | |
78 | (see below). */ | |
79 | void (*call_readline) (gdb_client_data); | |
80 | ||
81 | /* The function to invoke when a complete line of input is ready for | |
82 | processing. */ | |
83 | void (*input_handler) (char *); | |
79aa2fe8 | 84 | |
3c216924 PA |
85 | /* True if this UI is using the readline library for command |
86 | editing; false if using GDB's own simple readline emulation, with | |
87 | no editing support. */ | |
88 | int command_editing; | |
89 | ||
cb814510 PA |
90 | /* Each UI has its own independent set of interpreters. */ |
91 | struct ui_interp_info *interp_info; | |
92 | ||
93 | /* True if the UI is in async mode, false if in sync mode. If in | |
94 | sync mode, a synchronous execution command (e.g, "next") does not | |
95 | return until the command is finished. If in async mode, then | |
96 | running a synchronous command returns right after resuming the | |
97 | target. Waiting for the command's completion is later done on | |
98 | the top event loop. For the main UI, this starts out disabled, | |
99 | until all the explicit command line arguments (e.g., `gdb -ex | |
100 | "start" -ex "next"') are processed. */ | |
101 | int async; | |
102 | ||
dbf30ca3 PA |
103 | /* The number of nested readline secondary prompts that are |
104 | currently active. */ | |
105 | int secondary_prompt_depth; | |
106 | ||
268a799a PA |
107 | /* The UI's stdin. Set to stdin for the main UI. */ |
108 | FILE *stdin_stream; | |
109 | ||
f38d3ad1 PA |
110 | /* stdio stream that command input is being read from. Set to stdin |
111 | normally. Set by source_command to the file we are sourcing. | |
112 | Set to NULL if we are executing a user-defined command or | |
113 | interacting via a GUI. */ | |
114 | FILE *instream; | |
694ec099 PA |
115 | /* Standard output stream. */ |
116 | FILE *outstream; | |
117 | /* Standard error stream. */ | |
118 | FILE *errstream; | |
f38d3ad1 | 119 | |
41fd2b0f PA |
120 | /* The file descriptor for the input stream, so that we can register |
121 | it with the event loop. */ | |
122 | int input_fd; | |
123 | ||
268a799a PA |
124 | /* Whether ISATTY returns true on input_fd. Cached here because |
125 | quit_force needs to know this _after_ input_fd might be | |
126 | closed. */ | |
127 | int input_interactive_p; | |
128 | ||
3b12939d PA |
129 | /* See enum prompt_state's description. */ |
130 | enum prompt_state prompt_state; | |
131 | ||
79aa2fe8 PA |
132 | /* The fields below that start with "m_" are "private". They're |
133 | meant to be accessed through wrapper macros that make them look | |
134 | like globals. */ | |
135 | ||
136 | /* The ui_file streams. */ | |
137 | /* Normal results */ | |
138 | struct ui_file *m_gdb_stdout; | |
139 | /* Input stream */ | |
140 | struct ui_file *m_gdb_stdin; | |
141 | /* Serious error notifications */ | |
142 | struct ui_file *m_gdb_stderr; | |
143 | /* Log/debug/trace messages that should bypass normal stdout/stderr | |
144 | filtering. For moment, always call this stream using | |
145 | *_unfiltered. In the very near future that restriction shall be | |
146 | removed - either call shall be unfiltered. (cagney 1999-06-13). */ | |
147 | struct ui_file *m_gdb_stdlog; | |
b6dcde57 PA |
148 | |
149 | /* The current ui_out. */ | |
150 | struct ui_out *m_current_uiout; | |
a74e1786 PA |
151 | }; |
152 | ||
7c36c34e PA |
153 | /* The main UI. This is the UI that is bound to stdin/stdout/stderr. |
154 | It always exists and is created automatically when GDB starts | |
155 | up. */ | |
156 | extern struct ui *main_ui; | |
157 | ||
73ab01a0 | 158 | /* The current UI. */ |
a74e1786 | 159 | extern struct ui *current_ui; |
b69d38af | 160 | |
73ab01a0 PA |
161 | /* The list of all UIs. */ |
162 | extern struct ui *ui_list; | |
163 | ||
0e454242 TT |
164 | /* State for SWITCH_THRU_ALL_UIS. */ |
165 | class switch_thru_all_uis | |
73ab01a0 | 166 | { |
0e454242 TT |
167 | public: |
168 | ||
169 | switch_thru_all_uis () : m_iter (ui_list), m_save_ui (¤t_ui) | |
170 | { | |
171 | current_ui = ui_list; | |
172 | } | |
173 | ||
174 | /* If done iterating, return true; otherwise return false. */ | |
175 | bool done () const | |
176 | { | |
177 | return m_iter == NULL; | |
178 | } | |
179 | ||
180 | /* Move to the next UI, setting current_ui if iteration is not yet | |
181 | complete. */ | |
182 | void next () | |
183 | { | |
184 | m_iter = m_iter->next; | |
185 | if (m_iter != NULL) | |
186 | current_ui = m_iter; | |
187 | } | |
188 | ||
189 | private: | |
190 | ||
191 | /* No need for these. They are intentionally not defined | |
192 | anywhere. */ | |
193 | switch_thru_all_uis &operator= (const switch_thru_all_uis &); | |
194 | switch_thru_all_uis (const switch_thru_all_uis &); | |
195 | ||
196 | /* Used to iterate through the UIs. */ | |
197 | struct ui *m_iter; | |
198 | ||
199 | /* Save and restore current_ui. */ | |
200 | scoped_restore_tmpl<struct ui *> m_save_ui; | |
73ab01a0 PA |
201 | }; |
202 | ||
73ab01a0 PA |
203 | /* Traverse through all UI, and switch the current UI to the one |
204 | being iterated. */ | |
0e454242 TT |
205 | #define SWITCH_THRU_ALL_UIS() \ |
206 | for (switch_thru_all_uis stau_state; !stau_state.done (); stau_state.next ()) | |
73ab01a0 | 207 | |
3b12939d PA |
208 | /* Traverse over all UIs. */ |
209 | #define ALL_UIS(UI) \ | |
210 | for (UI = ui_list; UI; UI = UI->next) \ | |
211 | ||
3eb7562a PA |
212 | /* Register the UI's input file descriptor in the event loop. */ |
213 | extern void ui_register_input_event_handler (struct ui *ui); | |
214 | ||
215 | /* Unregister the UI's input file descriptor from the event loop. */ | |
216 | extern void ui_unregister_input_event_handler (struct ui *ui); | |
217 | ||
c906108c | 218 | /* From top.c. */ |
dc7eb48e | 219 | extern char *saved_command_line; |
e360902b | 220 | extern int confirm; |
c906108c | 221 | extern int inhibit_gdbinit; |
e655c1a2 | 222 | extern const char gdbinit[]; |
c906108c | 223 | |
d9fcf2fb | 224 | extern void print_gdb_version (struct ui_file *); |
6eaaf48b | 225 | extern void print_gdb_configuration (struct ui_file *); |
c906108c | 226 | |
a14ed312 KB |
227 | extern void read_command_file (FILE *); |
228 | extern void init_history (void); | |
229 | extern void command_loop (void); | |
a14ed312 | 230 | extern int quit_confirm (void); |
36cf1806 | 231 | extern void quit_force (int *, int); |
a14ed312 | 232 | extern void quit_command (char *, int); |
b2cd6b29 | 233 | extern void quit_cover (void); |
a14ed312 | 234 | extern void execute_command (char *, int); |
c906108c | 235 | |
98880d46 PA |
236 | /* If the interpreter is in sync mode (we're running a user command's |
237 | list, running command hooks or similars), and we just ran a | |
238 | synchronous command that started the target, wait for that command | |
239 | to end. WAS_SYNC indicates whether sync_execution was set before | |
240 | the command was run. */ | |
241 | ||
242 | extern void maybe_wait_sync_command_done (int was_sync); | |
243 | ||
0b333c5e PA |
244 | /* Wait for a synchronous execution command to end. */ |
245 | extern void wait_sync_command_done (void); | |
246 | ||
77cce10f PA |
247 | extern void check_frame_language_change (void); |
248 | ||
4e5d721f | 249 | /* Prepare for execution of a command. |
028d0ed5 TJB |
250 | Call this before every command, CLI or MI. |
251 | Returns a cleanup to be run after the command is completed. */ | |
252 | extern struct cleanup *prepare_execute_command (void); | |
4e5d721f | 253 | |
c906108c | 254 | /* This function returns a pointer to the string that is used |
371d5dec | 255 | by gdb for its command prompt. */ |
ab821bc6 | 256 | extern char *get_prompt (void); |
95298e72 PM |
257 | |
258 | /* This function returns a pointer to the string that is used | |
ab821bc6 PA |
259 | by gdb for its command prompt. */ |
260 | extern void set_prompt (const char *s); | |
c906108c | 261 | |
dbf30ca3 PA |
262 | /* Return 1 if UI's current input handler is a secondary prompt, 0 |
263 | otherwise. */ | |
948578a9 | 264 | |
dbf30ca3 | 265 | extern int gdb_in_secondary_prompt_p (struct ui *ui); |
948578a9 | 266 | |
c906108c | 267 | /* From random places. */ |
c906108c | 268 | extern int readnow_symbol_files; |
392a587b | 269 | |
371d5dec | 270 | /* Perform _initialize initialization. */ |
a14ed312 | 271 | extern void gdb_init (char *); |
0f71a2f6 | 272 | |
371d5dec MS |
273 | /* For use by event-top.c. */ |
274 | /* Variables from top.c. */ | |
0f71a2f6 | 275 | extern int source_line_number; |
05159abe | 276 | extern const char *source_file_name; |
0f71a2f6 JM |
277 | extern int history_expansion_p; |
278 | extern int server_command; | |
6dd77b81 | 279 | extern char *lim_at_start; |
17732724 | 280 | |
08b13bdd PP |
281 | extern void gdb_add_history (const char *); |
282 | ||
b9362cc7 AC |
283 | extern void show_commands (char *args, int from_tty); |
284 | ||
981a3fb3 | 285 | extern void set_history (const char *, int); |
b9362cc7 | 286 | |
981a3fb3 | 287 | extern void show_history (const char *, int); |
b9362cc7 AC |
288 | |
289 | extern void set_verbose (char *, int, struct cmd_list_element *); | |
290 | ||
b69d38af PA |
291 | extern char *handle_line_of_input (struct buffer *cmd_line_buffer, |
292 | char *rl, int repeat, | |
a121b7c1 | 293 | const char *annotation_suffix); |
b69d38af | 294 | |
17732724 | 295 | #endif |