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4a8f6654 AC |
1 | /* MI Interpreter Definitions and Commands for GDB, the GNU debugger. |
2 | ||
9b254dd1 DJ |
3 | Copyright (C) 2002, 2003, 2004, 2005, 2007, 2008 |
4 | Free Software Foundation, Inc. | |
4a8f6654 AC |
5 | |
6 | This file is part of GDB. | |
7 | ||
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 | |
a9762ec7 | 10 | the Free Software Foundation; either version 3 of the License, or |
4a8f6654 AC |
11 | (at your option) any later version. |
12 | ||
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. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
a9762ec7 | 19 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
4a8f6654 AC |
20 | |
21 | #include "defs.h" | |
22 | #include "gdb_string.h" | |
23 | #include "interps.h" | |
24 | #include "event-top.h" | |
25 | #include "event-loop.h" | |
26 | #include "inferior.h" | |
27 | #include "ui-out.h" | |
28 | #include "top.h" | |
c1043fc2 | 29 | #include "exceptions.h" |
4a8f6654 AC |
30 | #include "mi-main.h" |
31 | #include "mi-cmds.h" | |
32 | #include "mi-out.h" | |
33 | #include "mi-console.h" | |
683f2885 VP |
34 | #include "observer.h" |
35 | #include "gdbthread.h" | |
4a8f6654 AC |
36 | |
37 | struct mi_interp | |
38 | { | |
39 | /* MI's output channels */ | |
40 | struct ui_file *out; | |
41 | struct ui_file *err; | |
42 | struct ui_file *log; | |
43 | struct ui_file *targ; | |
44 | struct ui_file *event_channel; | |
45 | ||
46 | /* This is the interpreter for the mi... */ | |
47 | struct interp *mi2_interp; | |
48 | struct interp *mi1_interp; | |
49 | struct interp *mi_interp; | |
50 | }; | |
51 | ||
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); | |
4a8f6654 AC |
55 | |
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 */ | |
bee0189a DJ |
59 | static int mi_interp_query_hook (const char *ctlstr, va_list ap) |
60 | ATTR_FORMAT (printf, 1, 0); | |
4a8f6654 | 61 | |
f786f615 | 62 | static void mi3_command_loop (void); |
4a8f6654 AC |
63 | static void mi2_command_loop (void); |
64 | static void mi1_command_loop (void); | |
65 | ||
66 | static void mi_insert_notify_hooks (void); | |
67 | static void mi_remove_notify_hooks (void); | |
68 | ||
683f2885 | 69 | static void mi_new_thread (struct thread_info *t); |
063bfe2e | 70 | static void mi_thread_exit (struct thread_info *t); |
683f2885 | 71 | |
4a8f6654 | 72 | static void * |
683f2885 | 73 | mi_interpreter_init (int top_level) |
4a8f6654 AC |
74 | { |
75 | struct mi_interp *mi = XMALLOC (struct mi_interp); | |
76 | ||
4a8f6654 AC |
77 | /* HACK: We need to force stdout/stderr to point at the console. This avoids |
78 | any potential side effects caused by legacy code that is still | |
79 | using the TUI / fputs_unfiltered_hook. So we set up output channels for | |
80 | this now, and swap them in when we are run. */ | |
81 | ||
82 | raw_stdout = stdio_fileopen (stdout); | |
83 | ||
84 | /* Create MI channels */ | |
85 | mi->out = mi_console_file_new (raw_stdout, "~", '"'); | |
86 | mi->err = mi_console_file_new (raw_stdout, "&", '"'); | |
87 | mi->log = mi->err; | |
88 | mi->targ = mi_console_file_new (raw_stdout, "@", '"'); | |
89 | mi->event_channel = mi_console_file_new (raw_stdout, "=", 0); | |
90 | ||
683f2885 | 91 | if (top_level) |
063bfe2e VP |
92 | { |
93 | observer_attach_new_thread (mi_new_thread); | |
94 | observer_attach_thread_exit (mi_thread_exit); | |
95 | } | |
683f2885 | 96 | |
4a8f6654 AC |
97 | return mi; |
98 | } | |
99 | ||
100 | static int | |
101 | mi_interpreter_resume (void *data) | |
102 | { | |
103 | struct mi_interp *mi = data; | |
104 | /* As per hack note in mi_interpreter_init, swap in the output channels... */ | |
105 | ||
106 | gdb_setup_readline (); | |
107 | ||
362646f5 AC |
108 | /* These overwrite some of the initialization done in |
109 | _intialize_event_loop. */ | |
110 | call_readline = gdb_readline2; | |
111 | input_handler = mi_execute_command_wrapper; | |
112 | add_file_handler (input_fd, stdin_event_handler, 0); | |
113 | async_command_editing_p = 0; | |
114 | /* FIXME: This is a total hack for now. PB's use of the MI | |
115 | implicitly relies on a bug in the async support which allows | |
116 | asynchronous commands to leak through the commmand loop. The bug | |
117 | involves (but is not limited to) the fact that sync_execution was | |
118 | erroneously initialized to 0. Duplicate by initializing it thus | |
119 | here... */ | |
120 | sync_execution = 0; | |
4a8f6654 AC |
121 | |
122 | gdb_stdout = mi->out; | |
123 | /* Route error and log output through the MI */ | |
124 | gdb_stderr = mi->err; | |
125 | gdb_stdlog = mi->log; | |
126 | /* Route target output through the MI. */ | |
127 | gdb_stdtarg = mi->targ; | |
1f20321b FR |
128 | /* Route target error through the MI as well. */ |
129 | gdb_stdtargerr = mi->targ; | |
4a8f6654 AC |
130 | |
131 | /* Replace all the hooks that we know about. There really needs to | |
132 | be a better way of doing this... */ | |
133 | clear_interpreter_hooks (); | |
134 | ||
9a4105ab | 135 | deprecated_show_load_progress = mi_load_progress; |
4a8f6654 AC |
136 | |
137 | /* If we're _the_ interpreter, take control. */ | |
138 | if (current_interp_named_p (INTERP_MI1)) | |
9a4105ab | 139 | deprecated_command_loop_hook = mi1_command_loop; |
f786f615 | 140 | else if (current_interp_named_p (INTERP_MI2)) |
9a4105ab | 141 | deprecated_command_loop_hook = mi2_command_loop; |
f786f615 | 142 | else if (current_interp_named_p (INTERP_MI3)) |
9a4105ab | 143 | deprecated_command_loop_hook = mi3_command_loop; |
4a8f6654 | 144 | else |
9a4105ab | 145 | deprecated_command_loop_hook = mi2_command_loop; |
4a8f6654 AC |
146 | |
147 | return 1; | |
148 | } | |
149 | ||
150 | static int | |
151 | mi_interpreter_suspend (void *data) | |
152 | { | |
153 | gdb_disable_readline (); | |
154 | return 1; | |
155 | } | |
156 | ||
71fff37b | 157 | static struct gdb_exception |
4a8f6654 AC |
158 | mi_interpreter_exec (void *data, const char *command) |
159 | { | |
71fff37b | 160 | static struct gdb_exception ok; |
4a8f6654 AC |
161 | char *tmp = alloca (strlen (command) + 1); |
162 | strcpy (tmp, command); | |
163 | mi_execute_command_wrapper (tmp); | |
c1043fc2 | 164 | return exception_none; |
4a8f6654 AC |
165 | } |
166 | ||
167 | /* Never display the default gdb prompt in mi case. */ | |
168 | static int | |
169 | mi_interpreter_prompt_p (void *data) | |
170 | { | |
171 | return 0; | |
172 | } | |
173 | ||
174 | static void | |
f107f563 | 175 | mi_interpreter_exec_continuation (struct continuation_arg *arg, int error_p) |
4a8f6654 AC |
176 | { |
177 | bpstat_do_actions (&stop_bpstat); | |
f107f563 VP |
178 | /* It's not clear what to do in the case of errror -- should we assume that |
179 | the target is stopped, or that it still runs? */ | |
4a8f6654 AC |
180 | if (!target_executing) |
181 | { | |
182 | fputs_unfiltered ("*stopped", raw_stdout); | |
183 | mi_out_put (uiout, raw_stdout); | |
184 | fputs_unfiltered ("\n", raw_stdout); | |
185 | fputs_unfiltered ("(gdb) \n", raw_stdout); | |
186 | gdb_flush (raw_stdout); | |
4a8f6654 AC |
187 | } |
188 | else if (target_can_async_p ()) | |
189 | { | |
190 | add_continuation (mi_interpreter_exec_continuation, NULL); | |
191 | } | |
192 | } | |
193 | ||
194 | enum mi_cmd_result | |
195 | mi_cmd_interpreter_exec (char *command, char **argv, int argc) | |
196 | { | |
197 | struct interp *interp_to_use; | |
4a8f6654 AC |
198 | int i; |
199 | struct interp_procs *procs; | |
a13e061a PA |
200 | char *mi_error_message = NULL; |
201 | struct cleanup *old_chain; | |
4a8f6654 AC |
202 | |
203 | if (argc < 2) | |
a13e061a | 204 | error ("mi_cmd_interpreter_exec: Usage: -interpreter-exec interp command"); |
4a8f6654 AC |
205 | |
206 | interp_to_use = interp_lookup (argv[0]); | |
207 | if (interp_to_use == NULL) | |
a13e061a | 208 | error ("mi_cmd_interpreter_exec: could not find interpreter \"%s\"", argv[0]); |
4a8f6654 AC |
209 | |
210 | if (!interp_exec_p (interp_to_use)) | |
a13e061a PA |
211 | error ("mi_cmd_interpreter_exec: interpreter \"%s\" does not support command execution", |
212 | argv[0]); | |
4a8f6654 AC |
213 | |
214 | /* Insert the MI out hooks, making sure to also call the interpreter's hooks | |
215 | if it has any. */ | |
216 | /* KRS: We shouldn't need this... Events should be installed and they should | |
217 | just ALWAYS fire something out down the MI channel... */ | |
218 | mi_insert_notify_hooks (); | |
219 | ||
220 | /* Now run the code... */ | |
221 | ||
a13e061a | 222 | old_chain = make_cleanup (null_cleanup, 0); |
4a8f6654 AC |
223 | for (i = 1; i < argc; i++) |
224 | { | |
32c1e744 VP |
225 | struct gdb_exception e = interp_exec (interp_to_use, argv[i]); |
226 | if (e.reason < 0) | |
227 | { | |
228 | mi_error_message = xstrdup (e.message); | |
a13e061a | 229 | make_cleanup (xfree, mi_error_message); |
32c1e744 VP |
230 | break; |
231 | } | |
4a8f6654 AC |
232 | } |
233 | ||
234 | mi_remove_notify_hooks (); | |
235 | ||
236 | /* Okay, now let's see if the command set the inferior going... | |
237 | Tricky point - have to do this AFTER resetting the interpreter, since | |
238 | changing the interpreter will clear out all the continuations for | |
239 | that interpreter... */ | |
240 | ||
241 | if (target_can_async_p () && target_executing) | |
242 | { | |
243 | fputs_unfiltered ("^running\n", raw_stdout); | |
244 | add_continuation (mi_interpreter_exec_continuation, NULL); | |
245 | } | |
246 | ||
a13e061a PA |
247 | if (mi_error_message != NULL) |
248 | error ("%s", mi_error_message); | |
249 | do_cleanups (old_chain); | |
250 | return MI_CMD_DONE; | |
4a8f6654 AC |
251 | } |
252 | ||
253 | /* | |
254 | * mi_insert_notify_hooks - This inserts a number of hooks that are meant to produce | |
255 | * async-notify ("=") MI messages while running commands in another interpreter | |
256 | * using mi_interpreter_exec. The canonical use for this is to allow access to | |
257 | * the gdb CLI interpreter from within the MI, while still producing MI style output | |
258 | * when actions in the CLI command change gdb's state. | |
259 | */ | |
260 | ||
261 | static void | |
262 | mi_insert_notify_hooks (void) | |
263 | { | |
9a4105ab | 264 | deprecated_query_hook = mi_interp_query_hook; |
4a8f6654 AC |
265 | } |
266 | ||
267 | static void | |
11308a41 | 268 | mi_remove_notify_hooks (void) |
4a8f6654 | 269 | { |
9a4105ab | 270 | deprecated_query_hook = NULL; |
4a8f6654 AC |
271 | } |
272 | ||
273 | static int | |
274 | mi_interp_query_hook (const char *ctlstr, va_list ap) | |
275 | { | |
276 | return 1; | |
277 | } | |
278 | ||
4a8f6654 AC |
279 | static void |
280 | mi_execute_command_wrapper (char *cmd) | |
281 | { | |
282 | mi_execute_command (cmd, stdin == instream); | |
283 | } | |
284 | ||
285 | static void | |
286 | mi1_command_loop (void) | |
287 | { | |
288 | mi_command_loop (1); | |
289 | } | |
290 | ||
291 | static void | |
292 | mi2_command_loop (void) | |
293 | { | |
294 | mi_command_loop (2); | |
295 | } | |
296 | ||
f786f615 AC |
297 | static void |
298 | mi3_command_loop (void) | |
299 | { | |
300 | mi_command_loop (3); | |
301 | } | |
302 | ||
4a8f6654 AC |
303 | static void |
304 | mi_command_loop (int mi_version) | |
305 | { | |
4a8f6654 AC |
306 | /* Turn off 8 bit strings in quoted output. Any character with the |
307 | high bit set is printed using C's octal format. */ | |
308 | sevenbit_strings = 1; | |
309 | /* Tell the world that we're alive */ | |
310 | fputs_unfiltered ("(gdb) \n", raw_stdout); | |
311 | gdb_flush (raw_stdout); | |
362646f5 | 312 | start_event_loop (); |
4a8f6654 AC |
313 | } |
314 | ||
683f2885 VP |
315 | static void |
316 | mi_new_thread (struct thread_info *t) | |
317 | { | |
318 | struct mi_interp *mi = top_level_interpreter_data (); | |
319 | ||
c6446539 | 320 | fprintf_unfiltered (mi->event_channel, "thread-created,id=\"%d\"", t->num); |
683f2885 VP |
321 | gdb_flush (mi->event_channel); |
322 | } | |
323 | ||
063bfe2e VP |
324 | static void |
325 | mi_thread_exit (struct thread_info *t) | |
326 | { | |
327 | struct mi_interp *mi = top_level_interpreter_data (); | |
328 | ||
329 | target_terminal_ours (); | |
330 | fprintf_unfiltered (mi->event_channel, "thread-exited,id=\"%d\"", t->num); | |
331 | gdb_flush (mi->event_channel); | |
332 | } | |
333 | ||
b9362cc7 AC |
334 | extern initialize_file_ftype _initialize_mi_interp; /* -Wmissing-prototypes */ |
335 | ||
4a8f6654 AC |
336 | void |
337 | _initialize_mi_interp (void) | |
338 | { | |
339 | static const struct interp_procs procs = | |
340 | { | |
341 | mi_interpreter_init, /* init_proc */ | |
342 | mi_interpreter_resume, /* resume_proc */ | |
343 | mi_interpreter_suspend, /* suspend_proc */ | |
344 | mi_interpreter_exec, /* exec_proc */ | |
345 | mi_interpreter_prompt_p /* prompt_proc_p */ | |
346 | }; | |
347 | ||
2fcf52f0 | 348 | /* The various interpreter levels. */ |
4a8f6654 | 349 | interp_add (interp_new (INTERP_MI1, NULL, mi_out_new (1), &procs)); |
2fcf52f0 AC |
350 | interp_add (interp_new (INTERP_MI2, NULL, mi_out_new (2), &procs)); |
351 | interp_add (interp_new (INTERP_MI3, NULL, mi_out_new (3), &procs)); | |
4a8f6654 | 352 | |
2fcf52f0 AC |
353 | /* "mi" selects the most recent released version. "mi2" was |
354 | released as part of GDB 6.0. */ | |
355 | interp_add (interp_new (INTERP_MI, NULL, mi_out_new (2), &procs)); | |
4a8f6654 | 356 | } |