1 /* Top level stuff for GDB, the GNU debugger.
3 Copyright (C) 1986-2016 Free Software Foundation, Inc.
5 This file is part of GDB.
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
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
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.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
24 #include "event-loop.h"
26 struct tl_interp_info;
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. */
38 /* The command finished; display the prompt before returning back to
42 /* We've displayed the prompt already, ready for input. */
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
57 /* Pointer to next in singly-linked list. */
60 /* The UI's command line buffer. This is to used to accumulate
61 input until we have a whole command line. */
62 struct buffer line_buffer;
64 /* The callback used by the event loop whenever an event is detected
65 on the UI's input file descriptor. This function incrementally
66 builds a buffer where it accumulates the line read up to the
67 point of invocation. In the special case in which the character
68 read is newline, the function invokes the INPUT_HANDLER callback
70 void (*call_readline) (gdb_client_data);
72 /* The function to invoke when a complete line of input is ready for
74 void (*input_handler) (char *);
76 /* True if this UI is using the readline library for command
77 editing; false if using GDB's own simple readline emulation, with
78 no editing support. */
81 /* Each UI has its own independent set of interpreters. */
82 struct ui_interp_info *interp_info;
84 /* True if the UI is in async mode, false if in sync mode. If in
85 sync mode, a synchronous execution command (e.g, "next") does not
86 return until the command is finished. If in async mode, then
87 running a synchronous command returns right after resuming the
88 target. Waiting for the command's completion is later done on
89 the top event loop. For the main UI, this starts out disabled,
90 until all the explicit command line arguments (e.g., `gdb -ex
91 "start" -ex "next"') are processed. */
94 /* The number of nested readline secondary prompts that are
96 int secondary_prompt_depth;
98 /* stdio stream that command input is being read from. Set to stdin
99 normally. Set by source_command to the file we are sourcing.
100 Set to NULL if we are executing a user-defined command or
101 interacting via a GUI. */
103 /* Standard output stream. */
105 /* Standard error stream. */
108 /* The file descriptor for the input stream, so that we can register
109 it with the event loop. */
112 /* See enum prompt_state's description. */
113 enum prompt_state prompt_state;
115 /* The fields below that start with "m_" are "private". They're
116 meant to be accessed through wrapper macros that make them look
119 /* The ui_file streams. */
121 struct ui_file *m_gdb_stdout;
123 struct ui_file *m_gdb_stdin;
124 /* Serious error notifications */
125 struct ui_file *m_gdb_stderr;
126 /* Log/debug/trace messages that should bypass normal stdout/stderr
127 filtering. For moment, always call this stream using
128 *_unfiltered. In the very near future that restriction shall be
129 removed - either call shall be unfiltered. (cagney 1999-06-13). */
130 struct ui_file *m_gdb_stdlog;
132 /* The current ui_out. */
133 struct ui_out *m_current_uiout;
136 /* The main UI. This is the UI that is bound to stdin/stdout/stderr.
137 It always exists and is created automatically when GDB starts
139 extern struct ui *main_ui;
141 /* The current UI. */
142 extern struct ui *current_ui;
144 /* The list of all UIs. */
145 extern struct ui *ui_list;
147 /* State for SWITCH_THRU_ALL_UIS. Declared here because it is meant
148 to be created on the stack, but should be treated as opaque. */
149 struct switch_thru_all_uis
152 struct cleanup *old_chain;
155 /* Functions to drive SWITCH_THRU_ALL_UIS. Though declared here by
156 necessity, these functions should not be used other than via the
157 SWITCH_THRU_ALL_UIS macro defined below. */
158 extern void switch_thru_all_uis_init (struct switch_thru_all_uis *state);
159 extern int switch_thru_all_uis_cond (struct switch_thru_all_uis *state);
160 extern void switch_thru_all_uis_next (struct switch_thru_all_uis *state);
162 /* Traverse through all UI, and switch the current UI to the one
164 #define SWITCH_THRU_ALL_UIS(STATE) \
165 for (switch_thru_all_uis_init (&STATE); \
166 switch_thru_all_uis_cond (&STATE); \
167 switch_thru_all_uis_next (&STATE))
169 /* Traverse over all UIs. */
170 #define ALL_UIS(UI) \
171 for (UI = ui_list; UI; UI = UI->next) \
173 /* Cleanup that restores the current UI. */
174 extern void restore_ui_cleanup (void *data);
177 extern char *saved_command_line;
178 extern int in_user_command;
180 extern char gdb_dirbuf[1024];
181 extern int inhibit_gdbinit;
182 extern const char gdbinit[];
184 extern void print_gdb_version (struct ui_file *);
185 extern void print_gdb_configuration (struct ui_file *);
187 extern void read_command_file (FILE *);
188 extern void init_history (void);
189 extern void command_loop (void);
190 extern int quit_confirm (void);
191 extern void quit_force (char *, int);
192 extern void quit_command (char *, int);
193 extern void quit_cover (void);
194 extern void execute_command (char *, int);
196 /* If the interpreter is in sync mode (we're running a user command's
197 list, running command hooks or similars), and we just ran a
198 synchronous command that started the target, wait for that command
199 to end. WAS_SYNC indicates whether sync_execution was set before
200 the command was run. */
202 extern void maybe_wait_sync_command_done (int was_sync);
204 /* Wait for a synchronous execution command to end. */
205 extern void wait_sync_command_done (void);
207 extern void check_frame_language_change (void);
209 /* Prepare for execution of a command.
210 Call this before every command, CLI or MI.
211 Returns a cleanup to be run after the command is completed. */
212 extern struct cleanup *prepare_execute_command (void);
214 /* This function returns a pointer to the string that is used
215 by gdb for its command prompt. */
216 extern char *get_prompt (void);
218 /* This function returns a pointer to the string that is used
219 by gdb for its command prompt. */
220 extern void set_prompt (const char *s);
222 /* Return 1 if UI's current input handler is a secondary prompt, 0
225 extern int gdb_in_secondary_prompt_p (struct ui *ui);
227 /* From random places. */
228 extern int readnow_symbol_files;
230 /* Perform _initialize initialization. */
231 extern void gdb_init (char *);
233 /* For use by event-top.c. */
234 /* Variables from top.c. */
235 extern int source_line_number;
236 extern const char *source_file_name;
237 extern int history_expansion_p;
238 extern int server_command;
239 extern char *lim_at_start;
241 extern void gdb_add_history (const char *);
243 extern void show_commands (char *args, int from_tty);
245 extern void set_history (char *, int);
247 extern void show_history (char *, int);
249 extern void set_verbose (char *, int, struct cmd_list_element *);
251 extern void do_restore_instream_cleanup (void *stream);
253 extern char *handle_line_of_input (struct buffer *cmd_line_buffer,
254 char *rl, int repeat,
255 char *annotation_suffix);