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;
28 /* All about a user interface instance. Each user interface has its
29 own I/O files/streams, readline state, its own top level
30 interpreter (for the main UI, this is the interpreter specified
31 with -i on the command line) and secondary interpreters (for
32 interpreter-exec ...), etc. There's always one UI associated with
33 stdin/stdout/stderr, but the user can create secondary UIs, for
34 example, to create a separate MI channel on its own stdio
39 /* Pointer to next in singly-linked list. */
42 /* The UI's command line buffer. This is to used to accumulate
43 input until we have a whole command line. */
44 struct buffer line_buffer;
46 /* The callback used by the event loop whenever an event is detected
47 on the UI's input file descriptor. This function incrementally
48 builds a buffer where it accumulates the line read up to the
49 point of invocation. In the special case in which the character
50 read is newline, the function invokes the INPUT_HANDLER callback
52 void (*call_readline) (gdb_client_data);
54 /* The function to invoke when a complete line of input is ready for
56 void (*input_handler) (char *);
58 /* Each UI has its own independent set of interpreters. */
59 struct ui_interp_info *interp_info;
61 /* True if the UI is in async mode, false if in sync mode. If in
62 sync mode, a synchronous execution command (e.g, "next") does not
63 return until the command is finished. If in async mode, then
64 running a synchronous command returns right after resuming the
65 target. Waiting for the command's completion is later done on
66 the top event loop. For the main UI, this starts out disabled,
67 until all the explicit command line arguments (e.g., `gdb -ex
68 "start" -ex "next"') are processed. */
71 /* The fields below that start with "m_" are "private". They're
72 meant to be accessed through wrapper macros that make them look
75 /* The ui_file streams. */
77 struct ui_file *m_gdb_stdout;
79 struct ui_file *m_gdb_stdin;
80 /* Serious error notifications */
81 struct ui_file *m_gdb_stderr;
82 /* Log/debug/trace messages that should bypass normal stdout/stderr
83 filtering. For moment, always call this stream using
84 *_unfiltered. In the very near future that restriction shall be
85 removed - either call shall be unfiltered. (cagney 1999-06-13). */
86 struct ui_file *m_gdb_stdlog;
89 /* The main UI. This is the UI that is bound to stdin/stdout/stderr.
90 It always exists and is created automatically when GDB starts
92 extern struct ui *main_ui;
95 extern struct ui *current_ui;
97 /* The list of all UIs. */
98 extern struct ui *ui_list;
100 /* State for SWITCH_THRU_ALL_UIS. Declared here because it is meant
101 to be created on the stack, but should be treated as opaque. */
102 struct switch_thru_all_uis
105 struct cleanup *old_chain;
108 /* Functions to drive SWITCH_THRU_ALL_UIS. Though declared here by
109 necessity, these functions should not be used other than via the
110 SWITCH_THRU_ALL_UIS macro defined below. */
111 extern void switch_thru_all_uis_init (struct switch_thru_all_uis *state);
112 extern int switch_thru_all_uis_cond (struct switch_thru_all_uis *state);
113 extern void switch_thru_all_uis_next (struct switch_thru_all_uis *state);
115 /* Traverse through all UI, and switch the current UI to the one
117 #define SWITCH_THRU_ALL_UIS(STATE) \
118 for (switch_thru_all_uis_init (&STATE); \
119 switch_thru_all_uis_cond (&STATE); \
120 switch_thru_all_uis_next (&STATE))
123 extern char *saved_command_line;
124 extern FILE *instream;
125 extern int in_user_command;
127 extern char gdb_dirbuf[1024];
128 extern int inhibit_gdbinit;
129 extern const char gdbinit[];
131 extern void print_gdb_version (struct ui_file *);
132 extern void print_gdb_configuration (struct ui_file *);
134 extern void read_command_file (FILE *);
135 extern void init_history (void);
136 extern void command_loop (void);
137 extern int quit_confirm (void);
138 extern void quit_force (char *, int);
139 extern void quit_command (char *, int);
140 extern void quit_cover (void);
141 extern void execute_command (char *, int);
143 /* If the interpreter is in sync mode (we're running a user command's
144 list, running command hooks or similars), and we just ran a
145 synchronous command that started the target, wait for that command
146 to end. WAS_SYNC indicates whether sync_execution was set before
147 the command was run. */
149 extern void maybe_wait_sync_command_done (int was_sync);
151 /* Wait for a synchronous execution command to end. */
152 extern void wait_sync_command_done (void);
154 extern void check_frame_language_change (void);
156 /* Prepare for execution of a command.
157 Call this before every command, CLI or MI.
158 Returns a cleanup to be run after the command is completed. */
159 extern struct cleanup *prepare_execute_command (void);
161 /* This function returns a pointer to the string that is used
162 by gdb for its command prompt. */
163 extern char *get_prompt (void);
165 /* This function returns a pointer to the string that is used
166 by gdb for its command prompt. */
167 extern void set_prompt (const char *s);
169 /* Return 1 if the current input handler is a secondary prompt, 0 otherwise. */
171 extern int gdb_in_secondary_prompt_p (void);
173 /* From random places. */
174 extern int readnow_symbol_files;
176 /* Perform _initialize initialization. */
177 extern void gdb_init (char *);
179 /* For use by event-top.c. */
180 /* Variables from top.c. */
181 extern int source_line_number;
182 extern const char *source_file_name;
183 extern int history_expansion_p;
184 extern int server_command;
185 extern char *lim_at_start;
187 extern void gdb_add_history (const char *);
189 extern void show_commands (char *args, int from_tty);
191 extern void set_history (char *, int);
193 extern void show_history (char *, int);
195 extern void set_verbose (char *, int, struct cmd_list_element *);
197 extern void do_restore_instream_cleanup (void *stream);
199 extern char *handle_line_of_input (struct buffer *cmd_line_buffer,
200 char *rl, int repeat,
201 char *annotation_suffix);