1 /* MI Interpreter Definitions and Commands for GDB, the GNU debugger.
3 Copyright (C) 2002, 2003, 2004, 2005, 2007, 2008
4 Free Software Foundation, Inc.
6 This file is part of GDB.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>. */
22 #include "gdb_string.h"
24 #include "event-top.h"
25 #include "event-loop.h"
29 #include "exceptions.h"
33 #include "mi-console.h"
35 #include "gdbthread.h"
39 /* MI's output channels */
44 struct ui_file *event_channel;
46 /* This is the interpreter for the mi... */
47 struct interp *mi2_interp;
48 struct interp *mi1_interp;
49 struct interp *mi_interp;
52 /* These are the interpreter setup, etc. functions for the MI interpreter */
53 static void mi_execute_command_wrapper (char *cmd);
54 static void mi_command_loop (int mi_version);
56 /* These are hooks that we put in place while doing interpreter_exec
57 so we can report interesting things that happened "behind the mi's
58 back" in this command */
59 static int mi_interp_query_hook (const char *ctlstr, va_list ap)
60 ATTR_FORMAT (printf, 1, 0);
62 static void mi3_command_loop (void);
63 static void mi2_command_loop (void);
64 static void mi1_command_loop (void);
66 static void mi_insert_notify_hooks (void);
67 static void mi_remove_notify_hooks (void);
68 static void mi_on_normal_stop (struct bpstats *bs);
70 static void mi_new_thread (struct thread_info *t);
71 static void mi_thread_exit (struct thread_info *t);
72 static void mi_on_resume (ptid_t ptid);
75 mi_interpreter_init (int top_level)
77 struct mi_interp *mi = XMALLOC (struct mi_interp);
79 /* HACK: We need to force stdout/stderr to point at the console. This avoids
80 any potential side effects caused by legacy code that is still
81 using the TUI / fputs_unfiltered_hook. So we set up output channels for
82 this now, and swap them in when we are run. */
84 raw_stdout = stdio_fileopen (stdout);
86 /* Create MI channels */
87 mi->out = mi_console_file_new (raw_stdout, "~", '"');
88 mi->err = mi_console_file_new (raw_stdout, "&", '"');
90 mi->targ = mi_console_file_new (raw_stdout, "@", '"');
91 mi->event_channel = mi_console_file_new (raw_stdout, "=", 0);
95 observer_attach_new_thread (mi_new_thread);
96 observer_attach_thread_exit (mi_thread_exit);
97 observer_attach_normal_stop (mi_on_normal_stop);
98 observer_attach_target_resumed (mi_on_resume);
105 mi_interpreter_resume (void *data)
107 struct mi_interp *mi = data;
108 /* As per hack note in mi_interpreter_init, swap in the output channels... */
110 gdb_setup_readline ();
112 /* These overwrite some of the initialization done in
113 _intialize_event_loop. */
114 call_readline = gdb_readline2;
115 input_handler = mi_execute_command_wrapper;
116 add_file_handler (input_fd, stdin_event_handler, 0);
117 async_command_editing_p = 0;
118 /* FIXME: This is a total hack for now. PB's use of the MI
119 implicitly relies on a bug in the async support which allows
120 asynchronous commands to leak through the commmand loop. The bug
121 involves (but is not limited to) the fact that sync_execution was
122 erroneously initialized to 0. Duplicate by initializing it thus
126 gdb_stdout = mi->out;
127 /* Route error and log output through the MI */
128 gdb_stderr = mi->err;
129 gdb_stdlog = mi->log;
130 /* Route target output through the MI. */
131 gdb_stdtarg = mi->targ;
132 /* Route target error through the MI as well. */
133 gdb_stdtargerr = mi->targ;
135 /* Replace all the hooks that we know about. There really needs to
136 be a better way of doing this... */
137 clear_interpreter_hooks ();
139 deprecated_show_load_progress = mi_load_progress;
141 /* If we're _the_ interpreter, take control. */
142 if (current_interp_named_p (INTERP_MI1))
143 deprecated_command_loop_hook = mi1_command_loop;
144 else if (current_interp_named_p (INTERP_MI2))
145 deprecated_command_loop_hook = mi2_command_loop;
146 else if (current_interp_named_p (INTERP_MI3))
147 deprecated_command_loop_hook = mi3_command_loop;
149 deprecated_command_loop_hook = mi2_command_loop;
155 mi_interpreter_suspend (void *data)
157 gdb_disable_readline ();
161 static struct gdb_exception
162 mi_interpreter_exec (void *data, const char *command)
164 static struct gdb_exception ok;
165 char *tmp = alloca (strlen (command) + 1);
166 strcpy (tmp, command);
167 mi_execute_command_wrapper (tmp);
168 return exception_none;
171 /* Never display the default gdb prompt in mi case. */
173 mi_interpreter_prompt_p (void *data)
179 mi_cmd_interpreter_exec (char *command, char **argv, int argc)
181 struct interp *interp_to_use;
183 struct interp_procs *procs;
184 char *mi_error_message = NULL;
185 struct cleanup *old_chain;
188 error ("mi_cmd_interpreter_exec: Usage: -interpreter-exec interp command");
190 interp_to_use = interp_lookup (argv[0]);
191 if (interp_to_use == NULL)
192 error ("mi_cmd_interpreter_exec: could not find interpreter \"%s\"", argv[0]);
194 if (!interp_exec_p (interp_to_use))
195 error ("mi_cmd_interpreter_exec: interpreter \"%s\" does not support command execution",
198 /* Insert the MI out hooks, making sure to also call the interpreter's hooks
200 /* KRS: We shouldn't need this... Events should be installed and they should
201 just ALWAYS fire something out down the MI channel... */
202 mi_insert_notify_hooks ();
204 /* Now run the code... */
206 old_chain = make_cleanup (null_cleanup, 0);
207 for (i = 1; i < argc; i++)
209 struct gdb_exception e = interp_exec (interp_to_use, argv[i]);
212 mi_error_message = xstrdup (e.message);
213 make_cleanup (xfree, mi_error_message);
218 mi_remove_notify_hooks ();
220 if (mi_error_message != NULL)
221 error ("%s", mi_error_message);
222 do_cleanups (old_chain);
226 * mi_insert_notify_hooks - This inserts a number of hooks that are meant to produce
227 * async-notify ("=") MI messages while running commands in another interpreter
228 * using mi_interpreter_exec. The canonical use for this is to allow access to
229 * the gdb CLI interpreter from within the MI, while still producing MI style output
230 * when actions in the CLI command change gdb's state.
234 mi_insert_notify_hooks (void)
236 deprecated_query_hook = mi_interp_query_hook;
240 mi_remove_notify_hooks (void)
242 deprecated_query_hook = NULL;
246 mi_interp_query_hook (const char *ctlstr, va_list ap)
252 mi_execute_command_wrapper (char *cmd)
254 mi_execute_command (cmd, stdin == instream);
258 mi1_command_loop (void)
264 mi2_command_loop (void)
270 mi3_command_loop (void)
276 mi_command_loop (int mi_version)
278 /* Turn off 8 bit strings in quoted output. Any character with the
279 high bit set is printed using C's octal format. */
280 sevenbit_strings = 1;
281 /* Tell the world that we're alive */
282 fputs_unfiltered ("(gdb) \n", raw_stdout);
283 gdb_flush (raw_stdout);
288 mi_new_thread (struct thread_info *t)
290 struct mi_interp *mi = top_level_interpreter_data ();
292 fprintf_unfiltered (mi->event_channel, "thread-created,id=\"%d\"", t->num);
293 gdb_flush (mi->event_channel);
297 mi_thread_exit (struct thread_info *t)
299 struct mi_interp *mi = top_level_interpreter_data ();
300 target_terminal_ours ();
301 fprintf_unfiltered (mi->event_channel, "thread-exited,id=\"%d\"", t->num);
302 gdb_flush (mi->event_channel);
306 mi_on_normal_stop (struct bpstats *bs)
308 /* Since this can be called when CLI command is executing,
309 using cli interpreter, be sure to use MI uiout for output,
310 not the current one. */
311 struct ui_out *uiout = interp_ui_out (top_level_interpreter ());
312 struct mi_interp *mi = top_level_interpreter_data ();
314 fputs_unfiltered ("*stopped", raw_stdout);
315 mi_out_put (uiout, raw_stdout);
316 mi_out_rewind (uiout);
317 fputs_unfiltered ("\n", raw_stdout);
318 gdb_flush (raw_stdout);
322 mi_on_resume (ptid_t ptid)
324 /* To cater for older frontends, emit ^running, but do it only once
325 per each command. We do it here, since at this point we know
326 that the target was successfully resumed, and in non-async mode,
327 we won't return back to MI interpreter code until the target
328 is done running, so delaying the output of "^running" until then
329 will make it impossible for frontend to know what's going on.
331 In future (MI3), we'll be outputting "^done" here. */
332 if (!running_result_record_printed)
335 fputs_unfiltered (current_token, raw_stdout);
336 fputs_unfiltered ("^running\n", raw_stdout);
339 if (PIDGET (ptid) == -1)
340 fprintf_unfiltered (raw_stdout, "*running,thread-id=\"all\"\n");
341 else if (thread_count () == 0)
343 /* This is a target where for single-threaded programs the thread
344 table has zero threads. Don't print any thread-id field. */
345 fprintf_unfiltered (raw_stdout, "*running\n");
349 struct thread_info *ti = find_thread_pid (ptid);
351 fprintf_unfiltered (raw_stdout, "*running,thread-id=\"%d\"\n", ti->num);
354 if (!running_result_record_printed)
356 running_result_record_printed = 1;
357 /* This is what gdb used to do historically -- printing prompt even if
358 it cannot actually accept any input. This will be surely removed
359 for MI3, and may be removed even earler. */
360 /* FIXME: review the use of target_is_async_p here -- is that
362 if (!target_is_async_p ())
363 fputs_unfiltered ("(gdb) \n", raw_stdout);
367 extern initialize_file_ftype _initialize_mi_interp; /* -Wmissing-prototypes */
370 _initialize_mi_interp (void)
372 static const struct interp_procs procs =
374 mi_interpreter_init, /* init_proc */
375 mi_interpreter_resume, /* resume_proc */
376 mi_interpreter_suspend, /* suspend_proc */
377 mi_interpreter_exec, /* exec_proc */
378 mi_interpreter_prompt_p /* prompt_proc_p */
381 /* The various interpreter levels. */
382 interp_add (interp_new (INTERP_MI1, NULL, mi_out_new (1), &procs));
383 interp_add (interp_new (INTERP_MI2, NULL, mi_out_new (2), &procs));
384 interp_add (interp_new (INTERP_MI3, NULL, mi_out_new (3), &procs));
386 /* "mi" selects the most recent released version. "mi2" was
387 released as part of GDB 6.0. */
388 interp_add (interp_new (INTERP_MI, NULL, mi_out_new (2), &procs));