aboutsummaryrefslogtreecommitdiff
path: root/gdb/cli/cli-interp.c
blob: ce43a4aa477d2ebc413904d3926a186968fdcc74 (plain)
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
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
/* CLI Definitions for GDB, the GNU debugger.

   Copyright (C) 2002-2015 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 3 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, see <http://www.gnu.org/licenses/>.  */

#include "defs.h"
#include "interps.h"
#include "event-top.h"
#include "ui-out.h"
#include "cli-out.h"
#include "top.h"		/* for "execute_command" */
#include "infrun.h"
#include "observer.h"

/* These are the ui_out and the interpreter for the console
   interpreter.  */
struct ui_out *cli_uiout;
static struct interp *cli_interp;

/* Longjmp-safe wrapper for "execute_command".  */
static struct gdb_exception safe_execute_command (struct ui_out *uiout,
						  char *command, 
						  int from_tty);

/* Observers for several run control events.  If the interpreter is
   quiet (i.e., another interpreter is being run with
   interpreter-exec), print nothing.  */

/* Observer for the signal_received notification.  */

static void
cli_on_signal_received (enum gdb_signal siggnal)
{
  if (!interp_quiet_p (cli_interp))
    print_signal_received_reason (cli_uiout, siggnal);
}

/* Observer for the end_stepping_range notification.  */

static void
cli_on_end_stepping_range (void)
{
  if (!interp_quiet_p (cli_interp))
    print_end_stepping_range_reason (cli_uiout);
}

/* Observer for the signalled notification.  */

static void
cli_on_signal_exited (enum gdb_signal siggnal)
{
  if (!interp_quiet_p (cli_interp))
    print_signal_exited_reason (cli_uiout, siggnal);
}

/* Observer for the exited notification.  */

static void
cli_on_exited (int exitstatus)
{
  if (!interp_quiet_p (cli_interp))
    print_exited_reason (cli_uiout, exitstatus);
}

/* Observer for the no_history notification.  */

static void
cli_on_no_history (void)
{
  if (!interp_quiet_p (cli_interp))
    print_no_history_reason (cli_uiout);
}

/* Observer for the sync_execution_done notification.  */

static void
cli_on_sync_execution_done (void)
{
  if (!interp_quiet_p (cli_interp))
    display_gdb_prompt (NULL);
}

/* Observer for the command_error notification.  */

static void
cli_on_command_error (void)
{
  if (!interp_quiet_p (cli_interp))
    display_gdb_prompt (NULL);
}

/* These implement the cli out interpreter: */

static void *
cli_interpreter_init (struct interp *self, int top_level)
{
  /* If changing this, remember to update tui-interp.c as well.  */
  observer_attach_end_stepping_range (cli_on_end_stepping_range);
  observer_attach_signal_received (cli_on_signal_received);
  observer_attach_signal_exited (cli_on_signal_exited);
  observer_attach_exited (cli_on_exited);
  observer_attach_no_history (cli_on_no_history);
  observer_attach_sync_execution_done (cli_on_sync_execution_done);
  observer_attach_command_error (cli_on_command_error);

  return NULL;
}

static int
cli_interpreter_resume (void *data)
{
  struct ui_file *stream;

  /*sync_execution = 1; */

  /* gdb_setup_readline will change gdb_stdout.  If the CLI was
     previously writing to gdb_stdout, then set it to the new
     gdb_stdout afterwards.  */

  stream = cli_out_set_stream (cli_uiout, gdb_stdout);
  if (stream != gdb_stdout)
    {
      cli_out_set_stream (cli_uiout, stream);
      stream = NULL;
    }

  gdb_setup_readline ();

  if (stream != NULL)
    cli_out_set_stream (cli_uiout, gdb_stdout);

  return 1;
}

static int
cli_interpreter_suspend (void *data)
{
  gdb_disable_readline ();
  return 1;
}

static struct gdb_exception
cli_interpreter_exec (void *data, const char *command_str)
{
  struct ui_file *old_stream;
  struct gdb_exception result;

  /* FIXME: cagney/2003-02-01: Need to const char *propogate
     safe_execute_command.  */
  char *str = strcpy (alloca (strlen (command_str) + 1), command_str);

  /* gdb_stdout could change between the time cli_uiout was
     initialized and now.  Since we're probably using a different
     interpreter which has a new ui_file for gdb_stdout, use that one
     instead of the default.

     It is important that it gets reset everytime, since the user
     could set gdb to use a different interpreter.  */
  old_stream = cli_out_set_stream (cli_uiout, gdb_stdout);
  result = safe_execute_command (cli_uiout, str, 1);
  cli_out_set_stream (cli_uiout, old_stream);
  return result;
}

static struct gdb_exception
safe_execute_command (struct ui_out *command_uiout, char *command, int from_tty)
{
  struct gdb_exception e = exception_none;
  struct ui_out *saved_uiout;

  /* Save and override the global ``struct ui_out'' builder.  */
  saved_uiout = current_uiout;
  current_uiout = command_uiout;

  TRY
    {
      execute_command (command, from_tty);
    }
  CATCH (exception, RETURN_MASK_ALL)
    {
      e = exception;
    }
  END_CATCH

  /* Restore the global builder.  */
  current_uiout = saved_uiout;

  /* FIXME: cagney/2005-01-13: This shouldn't be needed.  Instead the
     caller should print the exception.  */
  exception_print (gdb_stderr, e);
  return e;
}

static struct ui_out *
cli_ui_out (struct interp *self)
{
  return cli_uiout;
}

/* Standard gdb initialization hook.  */
extern initialize_file_ftype _initialize_cli_interp; /* -Wmissing-prototypes */

void
_initialize_cli_interp (void)
{
  static const struct interp_procs procs = {
    cli_interpreter_init,	/* init_proc */
    cli_interpreter_resume,	/* resume_proc */
    cli_interpreter_suspend,	/* suspend_proc */
    cli_interpreter_exec,	/* exec_proc */
    cli_ui_out,			/* ui_out_proc */
    NULL,                       /* set_logging_proc */
    cli_command_loop            /* command_loop_proc */
  };

  /* Create a default uiout builder for the CLI.  */
  cli_uiout = cli_out_new (gdb_stdout);
  cli_interp = interp_new (INTERP_CONSOLE, &procs);

  interp_add (cli_interp);
}