1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
|
/* TUI Interpreter definitions for GDB, the GNU debugger.
Copyright 2003 Free Software Foundation, Inc.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include "defs.h"
#include "interps.h"
#include "top.h"
#include "event-top.h"
#include "event-loop.h"
#include "ui-out.h"
#include "cli-out.h"
#include "tui/tui-data.h"
#include "readline/readline.h"
#include "tui/tui-win.h"
#include "tui/tui.h"
#include "tui/tui-io.h"
#include "exceptions.h"
/* Set to 1 when the TUI mode must be activated when we first start gdb. */
static int tui_start_enabled = 0;
/* Cleanup the tui before exiting. */
static void
tui_exit (void)
{
/* Disable the tui. Curses mode is left leaving the screen
in a clean state (see endwin()). */
tui_disable ();
}
/* These implement the TUI interpreter. */
static void *
tui_init (void)
{
/* Install exit handler to leave the screen in a good shape. */
atexit (tui_exit);
tui_initialize_static_data ();
tui_initialize_io ();
tui_initialize_readline ();
return NULL;
}
static int
tui_resume (void *data)
{
struct ui_file *stream;
/* gdb_setup_readline will change gdb_stdout. If the TUI was previously
writing to gdb_stdout, then set it to the new gdb_stdout afterwards. */
stream = cli_out_set_stream (tui_old_uiout, gdb_stdout);
if (stream != gdb_stdout)
{
cli_out_set_stream (tui_old_uiout, stream);
stream = NULL;
}
gdb_setup_readline ();
if (stream != NULL)
cli_out_set_stream (tui_old_uiout, gdb_stdout);
if (tui_start_enabled)
tui_enable ();
return 1;
}
static int
tui_suspend (void *data)
{
tui_start_enabled = tui_active;
tui_disable ();
return 1;
}
/* Display the prompt if we are silent. */
static int
tui_display_prompt_p (void *data)
{
if (interp_quiet_p (NULL))
return 0;
else
return 1;
}
static int
tui_exec (void *data, const char *command_str)
{
internal_error (__FILE__, __LINE__, "tui_exec called");
}
/* Initialize all the necessary variables, start the event loop,
register readline, and stdin, start the loop. */
static void
tui_command_loop (void *data)
{
int length;
char *a_prompt;
char *gdb_prompt = get_prompt ();
/* If we are using readline, set things up and display the first
prompt, otherwise just print the prompt. */
if (async_command_editing_p)
{
/* Tell readline what the prompt to display is and what function
it will need to call after a whole line is read. This also
displays the first prompt. */
length = strlen (PREFIX (0)) + strlen (gdb_prompt) + strlen (SUFFIX (0)) + 1;
a_prompt = (char *) xmalloc (length);
strcpy (a_prompt, PREFIX (0));
strcat (a_prompt, gdb_prompt);
strcat (a_prompt, SUFFIX (0));
rl_callback_handler_install (a_prompt, input_handler);
}
else
display_gdb_prompt (0);
/* Loop until there is nothing to do. This is the entry point to the
event loop engine. gdb_do_one_event, called via catch_errors()
will process one event for each invocation. It blocks waits for
an event and then processes it. >0 when an event is processed, 0
when catch_errors() caught an error and <0 when there are no
longer any event sources registered. */
while (1)
{
int result = catch_errors (gdb_do_one_event, 0, "", RETURN_MASK_ALL);
if (result < 0)
break;
/* Update gdb output according to TUI mode. Since catch_errors
preserves the uiout from changing, this must be done at top
level of event loop. */
if (tui_active)
uiout = tui_out;
else
uiout = tui_old_uiout;
if (result == 0)
{
/* FIXME: this should really be a call to a hook that is
interface specific, because interfaces can display the
prompt in their own way. */
display_gdb_prompt (0);
/* This call looks bizarre, but it is required. If the user
entered a command that caused an error,
after_char_processing_hook won't be called from
rl_callback_read_char_wrapper. Using a cleanup there
won't work, since we want this function to be called
after a new prompt is printed. */
if (after_char_processing_hook)
(*after_char_processing_hook) ();
/* Maybe better to set a flag to be checked somewhere as to
whether display the prompt or not. */
}
}
/* We are done with the event loop. There are no more event sources
to listen to. So we exit GDB. */
return;
}
void
_initialize_tui_interp (void)
{
static const struct interp_procs procs = {
tui_init,
tui_resume,
tui_suspend,
tui_exec,
tui_display_prompt_p,
tui_command_loop,
};
struct interp *tui_interp;
/* Create a default uiout builder for the TUI. */
tui_out = tui_out_new (gdb_stdout);
interp_add (interp_new ("tui", NULL, tui_out, &procs));
if (interpreter_p && strcmp (interpreter_p, "tui") == 0)
tui_start_enabled = 1;
if (interpreter_p && strcmp (interpreter_p, INTERP_CONSOLE) == 0)
{
xfree (interpreter_p);
interpreter_p = xstrdup ("tui");
}
}
|
