Commit | Line | Data |
---|---|---|
d318976c | 1 | /* GDB CLI command scripting. |
8926118c | 2 | |
6aba47ca | 3 | Copyright (c) 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, |
0fb0cc75 | 4 | 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2004, 2005, 2006, 2007, 2008, |
4c38e0a4 | 5 | 2009, 2010 Free Software Foundation, Inc. |
d318976c FN |
6 | |
7 | This file is part of GDB. | |
8 | ||
9 | This program is free software; you can redistribute it and/or modify | |
10 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 11 | the Free Software Foundation; either version 3 of the License, or |
d318976c FN |
12 | (at your option) any later version. |
13 | ||
14 | This program is distributed in the hope that it will be useful, | |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
18 | ||
19 | You should have received a copy of the GNU General Public License | |
a9762ec7 | 20 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
d318976c FN |
21 | |
22 | #include "defs.h" | |
23 | #include "value.h" | |
24 | #include "language.h" /* For value_true */ | |
25 | #include <ctype.h> | |
26 | ||
d318976c | 27 | #include "ui-out.h" |
5f8a3188 | 28 | #include "gdb_string.h" |
17d92a02 | 29 | #include "exceptions.h" |
d318976c | 30 | #include "top.h" |
40c03ae8 | 31 | #include "breakpoint.h" |
d318976c FN |
32 | #include "cli/cli-cmds.h" |
33 | #include "cli/cli-decode.h" | |
34 | #include "cli/cli-script.h" | |
c03c782f | 35 | #include "gdb_assert.h" |
d318976c | 36 | |
d57a3c85 TJB |
37 | #include "python/python.h" |
38 | ||
d318976c FN |
39 | /* Prototypes for local functions */ |
40 | ||
d318976c | 41 | static enum command_control_type |
a58d7472 | 42 | recurse_read_control_structure (char * (*read_next_line_func) (void), |
a7bdde9e VP |
43 | struct command_line *current_cmd, |
44 | void (*validator)(char *, void *), | |
45 | void *closure); | |
d318976c FN |
46 | |
47 | static char *insert_args (char *line); | |
48 | ||
49 | static struct cleanup * setup_user_args (char *p); | |
50 | ||
a58d7472 | 51 | static char *read_next_line (void); |
3c1179ff | 52 | |
16026cd7 | 53 | /* Level of control structure when reading. */ |
d318976c FN |
54 | static int control_level; |
55 | ||
16026cd7 AS |
56 | /* Level of control structure when executing. */ |
57 | static int command_nest_depth = 1; | |
58 | ||
59 | /* This is to prevent certain commands being printed twice. */ | |
60 | static int suppress_next_print_command_trace = 0; | |
61 | ||
d318976c FN |
62 | /* Structure for arguments to user defined functions. */ |
63 | #define MAXUSERARGS 10 | |
64 | struct user_args | |
65 | { | |
66 | struct user_args *next; | |
e28493f2 AS |
67 | /* It is necessary to store a malloced copy of the command line to |
68 | ensure that the arguments are not overwritten before they are used. */ | |
69 | char *command; | |
d318976c FN |
70 | struct |
71 | { | |
72 | char *arg; | |
73 | int len; | |
74 | } | |
75 | a[MAXUSERARGS]; | |
76 | int count; | |
77 | } | |
78 | *user_args; | |
79 | ||
80 | \f | |
81 | /* Allocate, initialize a new command line structure for one of the | |
82 | control commands (if/while). */ | |
83 | ||
84 | static struct command_line * | |
85 | build_command_line (enum command_control_type type, char *args) | |
86 | { | |
87 | struct command_line *cmd; | |
88 | ||
40c03ae8 | 89 | if (args == NULL && (type == if_control || type == while_control)) |
8a3fe4f8 | 90 | error (_("if/while commands require arguments.")); |
c8c12293 | 91 | gdb_assert (args != NULL); |
d318976c FN |
92 | |
93 | cmd = (struct command_line *) xmalloc (sizeof (struct command_line)); | |
94 | cmd->next = NULL; | |
95 | cmd->control_type = type; | |
96 | ||
97 | cmd->body_count = 1; | |
98 | cmd->body_list | |
99 | = (struct command_line **) xmalloc (sizeof (struct command_line *) | |
100 | * cmd->body_count); | |
101 | memset (cmd->body_list, 0, sizeof (struct command_line *) * cmd->body_count); | |
1b36a34b | 102 | cmd->line = xstrdup (args); |
dd3526aa | 103 | |
d318976c FN |
104 | return cmd; |
105 | } | |
106 | ||
107 | /* Build and return a new command structure for the control commands | |
108 | such as "if" and "while". */ | |
109 | ||
d57a3c85 | 110 | struct command_line * |
d318976c FN |
111 | get_command_line (enum command_control_type type, char *arg) |
112 | { | |
113 | struct command_line *cmd; | |
114 | struct cleanup *old_chain = NULL; | |
115 | ||
116 | /* Allocate and build a new command line structure. */ | |
117 | cmd = build_command_line (type, arg); | |
118 | ||
119 | old_chain = make_cleanup_free_command_lines (&cmd); | |
120 | ||
121 | /* Read in the body of this command. */ | |
a7bdde9e VP |
122 | if (recurse_read_control_structure (read_next_line, cmd, 0, 0) |
123 | == invalid_control) | |
d318976c | 124 | { |
40c03ae8 | 125 | warning (_("Error reading in canned sequence of commands.")); |
d318976c FN |
126 | do_cleanups (old_chain); |
127 | return NULL; | |
128 | } | |
129 | ||
130 | discard_cleanups (old_chain); | |
131 | return cmd; | |
132 | } | |
133 | ||
134 | /* Recursively print a command (including full control structures). */ | |
8926118c | 135 | |
d318976c FN |
136 | void |
137 | print_command_lines (struct ui_out *uiout, struct command_line *cmd, | |
138 | unsigned int depth) | |
139 | { | |
140 | struct command_line *list; | |
141 | ||
142 | list = cmd; | |
143 | while (list) | |
144 | { | |
145 | ||
146 | if (depth) | |
147 | ui_out_spaces (uiout, 2 * depth); | |
148 | ||
149 | /* A simple command, print it and continue. */ | |
150 | if (list->control_type == simple_control) | |
151 | { | |
152 | ui_out_field_string (uiout, NULL, list->line); | |
153 | ui_out_text (uiout, "\n"); | |
154 | list = list->next; | |
155 | continue; | |
156 | } | |
157 | ||
158 | /* loop_continue to jump to the start of a while loop, print it | |
159 | and continue. */ | |
160 | if (list->control_type == continue_control) | |
161 | { | |
162 | ui_out_field_string (uiout, NULL, "loop_continue"); | |
163 | ui_out_text (uiout, "\n"); | |
164 | list = list->next; | |
165 | continue; | |
166 | } | |
167 | ||
168 | /* loop_break to break out of a while loop, print it and continue. */ | |
169 | if (list->control_type == break_control) | |
170 | { | |
171 | ui_out_field_string (uiout, NULL, "loop_break"); | |
172 | ui_out_text (uiout, "\n"); | |
173 | list = list->next; | |
174 | continue; | |
175 | } | |
176 | ||
177 | /* A while command. Recursively print its subcommands and continue. */ | |
a7bdde9e VP |
178 | if (list->control_type == while_control |
179 | || list->control_type == while_stepping_control) | |
d318976c | 180 | { |
a7bdde9e VP |
181 | /* For while-stepping, the line includes the 'while-stepping' token. |
182 | See comment in process_next_line for explanation. Here, | |
183 | take care not print 'while-stepping' twice. */ | |
184 | if (list->control_type == while_control) | |
185 | ui_out_field_fmt (uiout, NULL, "while %s", list->line); | |
186 | else | |
187 | ui_out_field_string (uiout, NULL, list->line); | |
d318976c FN |
188 | ui_out_text (uiout, "\n"); |
189 | print_command_lines (uiout, *list->body_list, depth + 1); | |
d318976c FN |
190 | if (depth) |
191 | ui_out_spaces (uiout, 2 * depth); | |
e6ccd35f JSC |
192 | ui_out_field_string (uiout, NULL, "end"); |
193 | ui_out_text (uiout, "\n"); | |
d318976c FN |
194 | list = list->next; |
195 | continue; | |
196 | } | |
197 | ||
198 | /* An if command. Recursively print both arms before continueing. */ | |
199 | if (list->control_type == if_control) | |
200 | { | |
d318976c FN |
201 | ui_out_field_fmt (uiout, NULL, "if %s", list->line); |
202 | ui_out_text (uiout, "\n"); | |
203 | /* The true arm. */ | |
204 | print_command_lines (uiout, list->body_list[0], depth + 1); | |
205 | ||
206 | /* Show the false arm if it exists. */ | |
207 | if (list->body_count == 2) | |
208 | { | |
209 | if (depth) | |
210 | ui_out_spaces (uiout, 2 * depth); | |
211 | ui_out_field_string (uiout, NULL, "else"); | |
e6ccd35f | 212 | ui_out_text (uiout, "\n"); |
d318976c FN |
213 | print_command_lines (uiout, list->body_list[1], depth + 1); |
214 | } | |
215 | ||
d318976c FN |
216 | if (depth) |
217 | ui_out_spaces (uiout, 2 * depth); | |
e6ccd35f JSC |
218 | ui_out_field_string (uiout, NULL, "end"); |
219 | ui_out_text (uiout, "\n"); | |
d318976c FN |
220 | list = list->next; |
221 | continue; | |
222 | } | |
223 | ||
40c03ae8 EZ |
224 | /* A commands command. Print the breakpoint commands and continue. */ |
225 | if (list->control_type == commands_control) | |
226 | { | |
227 | if (*(list->line)) | |
228 | ui_out_field_fmt (uiout, NULL, "commands %s", list->line); | |
229 | else | |
230 | ui_out_field_string (uiout, NULL, "commands"); | |
231 | ui_out_text (uiout, "\n"); | |
232 | print_command_lines (uiout, *list->body_list, depth + 1); | |
233 | if (depth) | |
234 | ui_out_spaces (uiout, 2 * depth); | |
235 | ui_out_field_string (uiout, NULL, "end"); | |
236 | ui_out_text (uiout, "\n"); | |
237 | list = list->next; | |
238 | continue; | |
239 | } | |
240 | ||
d57a3c85 TJB |
241 | if (list->control_type == python_control) |
242 | { | |
243 | ui_out_field_string (uiout, NULL, "python"); | |
244 | ui_out_text (uiout, "\n"); | |
245 | /* Don't indent python code at all. */ | |
246 | print_command_lines (uiout, *list->body_list, 0); | |
247 | if (depth) | |
248 | ui_out_spaces (uiout, 2 * depth); | |
249 | ui_out_field_string (uiout, NULL, "end"); | |
250 | ui_out_text (uiout, "\n"); | |
251 | list = list->next; | |
252 | continue; | |
253 | } | |
254 | ||
d318976c FN |
255 | /* ignore illegal command type and try next */ |
256 | list = list->next; | |
257 | } /* while (list) */ | |
258 | } | |
d318976c | 259 | |
5913bcb0 AC |
260 | /* Handle pre-post hooks. */ |
261 | ||
b9362cc7 | 262 | static void |
5913bcb0 AC |
263 | clear_hook_in_cleanup (void *data) |
264 | { | |
265 | struct cmd_list_element *c = data; | |
266 | c->hook_in = 0; /* Allow hook to work again once it is complete */ | |
267 | } | |
268 | ||
269 | void | |
270 | execute_cmd_pre_hook (struct cmd_list_element *c) | |
271 | { | |
272 | if ((c->hook_pre) && (!c->hook_in)) | |
273 | { | |
274 | struct cleanup *cleanups = make_cleanup (clear_hook_in_cleanup, c); | |
275 | c->hook_in = 1; /* Prevent recursive hooking */ | |
276 | execute_user_command (c->hook_pre, (char *) 0); | |
277 | do_cleanups (cleanups); | |
278 | } | |
279 | } | |
280 | ||
281 | void | |
282 | execute_cmd_post_hook (struct cmd_list_element *c) | |
283 | { | |
284 | if ((c->hook_post) && (!c->hook_in)) | |
285 | { | |
286 | struct cleanup *cleanups = make_cleanup (clear_hook_in_cleanup, c); | |
287 | c->hook_in = 1; /* Prevent recursive hooking */ | |
288 | execute_user_command (c->hook_post, (char *) 0); | |
289 | do_cleanups (cleanups); | |
290 | } | |
291 | } | |
292 | ||
d318976c | 293 | /* Execute the command in CMD. */ |
b9362cc7 | 294 | static void |
20f01a46 DH |
295 | do_restore_user_call_depth (void * call_depth) |
296 | { | |
297 | int * depth = call_depth; | |
698ba934 DJ |
298 | (*depth)--; |
299 | if ((*depth) == 0) | |
300 | in_user_command = 0; | |
20f01a46 DH |
301 | } |
302 | ||
d318976c FN |
303 | |
304 | void | |
305 | execute_user_command (struct cmd_list_element *c, char *args) | |
306 | { | |
d5b5ac79 | 307 | struct command_line *cmdlines; |
d318976c FN |
308 | struct cleanup *old_chain; |
309 | enum command_control_type ret; | |
20f01a46 DH |
310 | static int user_call_depth = 0; |
311 | extern int max_user_call_depth; | |
d318976c FN |
312 | |
313 | old_chain = setup_user_args (args); | |
314 | ||
315 | cmdlines = c->user_commands; | |
316 | if (cmdlines == 0) | |
317 | /* Null command */ | |
318 | return; | |
319 | ||
20f01a46 | 320 | if (++user_call_depth > max_user_call_depth) |
8a3fe4f8 | 321 | error (_("Max user call depth exceeded -- command aborted.")); |
20f01a46 | 322 | |
698ba934 | 323 | make_cleanup (do_restore_user_call_depth, &user_call_depth); |
20f01a46 | 324 | |
d318976c FN |
325 | /* Set the instream to 0, indicating execution of a |
326 | user-defined function. */ | |
698ba934 | 327 | make_cleanup (do_restore_instream_cleanup, instream); |
d318976c | 328 | instream = (FILE *) 0; |
698ba934 DJ |
329 | |
330 | /* Also set the global in_user_command, so that NULL instream is | |
331 | not confused with Insight. */ | |
332 | in_user_command = 1; | |
333 | ||
8625200f | 334 | command_nest_depth++; |
d318976c FN |
335 | while (cmdlines) |
336 | { | |
337 | ret = execute_control_command (cmdlines); | |
338 | if (ret != simple_control && ret != break_control) | |
339 | { | |
40c03ae8 | 340 | warning (_("Error executing canned sequence of commands.")); |
d318976c FN |
341 | break; |
342 | } | |
343 | cmdlines = cmdlines->next; | |
344 | } | |
8625200f | 345 | command_nest_depth--; |
d318976c FN |
346 | do_cleanups (old_chain); |
347 | } | |
348 | ||
16026cd7 AS |
349 | /* This function is called every time GDB prints a prompt. |
350 | It ensures that errors and the like to not confuse the command tracing. */ | |
351 | ||
352 | void | |
353 | reset_command_nest_depth (void) | |
354 | { | |
355 | command_nest_depth = 1; | |
356 | ||
357 | /* Just in case. */ | |
358 | suppress_next_print_command_trace = 0; | |
359 | } | |
360 | ||
361 | /* Print the command, prefixed with '+' to represent the call depth. | |
362 | This is slightly complicated because this function may be called | |
363 | from execute_command and execute_control_command. Unfortunately | |
364 | execute_command also prints the top level control commands. | |
365 | In these cases execute_command will call execute_control_command | |
366 | via while_command or if_command. Inner levels of 'if' and 'while' | |
367 | are dealt with directly. Therefore we can use these functions | |
368 | to determine whether the command has been printed already or not. */ | |
369 | void | |
370 | print_command_trace (const char *cmd) | |
371 | { | |
372 | int i; | |
373 | ||
374 | if (suppress_next_print_command_trace) | |
375 | { | |
376 | suppress_next_print_command_trace = 0; | |
377 | return; | |
378 | } | |
379 | ||
380 | if (!source_verbose && !trace_commands) | |
381 | return; | |
382 | ||
383 | for (i=0; i < command_nest_depth; i++) | |
384 | printf_filtered ("+"); | |
385 | ||
386 | printf_filtered ("%s\n", cmd); | |
387 | } | |
388 | ||
d318976c FN |
389 | enum command_control_type |
390 | execute_control_command (struct command_line *cmd) | |
391 | { | |
392 | struct expression *expr; | |
393 | struct command_line *current; | |
4d2acc65 | 394 | struct cleanup *old_chain = make_cleanup (null_cleanup, 0); |
f976f6d4 AC |
395 | struct value *val; |
396 | struct value *val_mark; | |
d318976c FN |
397 | int loop; |
398 | enum command_control_type ret; | |
399 | char *new_line; | |
400 | ||
4d2acc65 AC |
401 | /* Start by assuming failure, if a problem is detected, the code |
402 | below will simply "break" out of the switch. */ | |
403 | ret = invalid_control; | |
404 | ||
d318976c FN |
405 | switch (cmd->control_type) |
406 | { | |
407 | case simple_control: | |
408 | /* A simple command, execute it and return. */ | |
409 | new_line = insert_args (cmd->line); | |
410 | if (!new_line) | |
4d2acc65 AC |
411 | break; |
412 | make_cleanup (free_current_contents, &new_line); | |
d318976c FN |
413 | execute_command (new_line, 0); |
414 | ret = cmd->control_type; | |
415 | break; | |
416 | ||
417 | case continue_control: | |
16026cd7 AS |
418 | print_command_trace ("loop_continue"); |
419 | ||
420 | /* Return for "continue", and "break" so we can either | |
421 | continue the loop at the top, or break out. */ | |
422 | ret = cmd->control_type; | |
423 | break; | |
424 | ||
d318976c | 425 | case break_control: |
16026cd7 AS |
426 | print_command_trace ("loop_break"); |
427 | ||
d318976c FN |
428 | /* Return for "continue", and "break" so we can either |
429 | continue the loop at the top, or break out. */ | |
430 | ret = cmd->control_type; | |
431 | break; | |
432 | ||
433 | case while_control: | |
434 | { | |
16026cd7 AS |
435 | char *buffer = alloca (strlen (cmd->line) + 7); |
436 | sprintf (buffer, "while %s", cmd->line); | |
437 | print_command_trace (buffer); | |
438 | ||
d318976c FN |
439 | /* Parse the loop control expression for the while statement. */ |
440 | new_line = insert_args (cmd->line); | |
441 | if (!new_line) | |
4d2acc65 AC |
442 | break; |
443 | make_cleanup (free_current_contents, &new_line); | |
d318976c FN |
444 | expr = parse_expression (new_line); |
445 | make_cleanup (free_current_contents, &expr); | |
446 | ||
447 | ret = simple_control; | |
448 | loop = 1; | |
449 | ||
450 | /* Keep iterating so long as the expression is true. */ | |
451 | while (loop == 1) | |
452 | { | |
453 | int cond_result; | |
454 | ||
455 | QUIT; | |
456 | ||
457 | /* Evaluate the expression. */ | |
458 | val_mark = value_mark (); | |
459 | val = evaluate_expression (expr); | |
460 | cond_result = value_true (val); | |
461 | value_free_to_mark (val_mark); | |
462 | ||
463 | /* If the value is false, then break out of the loop. */ | |
464 | if (!cond_result) | |
465 | break; | |
466 | ||
467 | /* Execute the body of the while statement. */ | |
468 | current = *cmd->body_list; | |
469 | while (current) | |
470 | { | |
16026cd7 | 471 | command_nest_depth++; |
d318976c | 472 | ret = execute_control_command (current); |
16026cd7 | 473 | command_nest_depth--; |
d318976c FN |
474 | |
475 | /* If we got an error, or a "break" command, then stop | |
476 | looping. */ | |
477 | if (ret == invalid_control || ret == break_control) | |
478 | { | |
479 | loop = 0; | |
480 | break; | |
481 | } | |
482 | ||
483 | /* If we got a "continue" command, then restart the loop | |
484 | at this point. */ | |
485 | if (ret == continue_control) | |
486 | break; | |
487 | ||
488 | /* Get the next statement. */ | |
489 | current = current->next; | |
490 | } | |
491 | } | |
492 | ||
493 | /* Reset RET so that we don't recurse the break all the way down. */ | |
494 | if (ret == break_control) | |
495 | ret = simple_control; | |
496 | ||
497 | break; | |
498 | } | |
499 | ||
500 | case if_control: | |
501 | { | |
16026cd7 AS |
502 | char *buffer = alloca (strlen (cmd->line) + 4); |
503 | sprintf (buffer, "if %s", cmd->line); | |
504 | print_command_trace (buffer); | |
505 | ||
d318976c FN |
506 | new_line = insert_args (cmd->line); |
507 | if (!new_line) | |
4d2acc65 AC |
508 | break; |
509 | make_cleanup (free_current_contents, &new_line); | |
d318976c FN |
510 | /* Parse the conditional for the if statement. */ |
511 | expr = parse_expression (new_line); | |
512 | make_cleanup (free_current_contents, &expr); | |
513 | ||
514 | current = NULL; | |
515 | ret = simple_control; | |
516 | ||
517 | /* Evaluate the conditional. */ | |
518 | val_mark = value_mark (); | |
519 | val = evaluate_expression (expr); | |
520 | ||
521 | /* Choose which arm to take commands from based on the value of the | |
522 | conditional expression. */ | |
523 | if (value_true (val)) | |
524 | current = *cmd->body_list; | |
525 | else if (cmd->body_count == 2) | |
526 | current = *(cmd->body_list + 1); | |
527 | value_free_to_mark (val_mark); | |
528 | ||
529 | /* Execute commands in the given arm. */ | |
530 | while (current) | |
531 | { | |
16026cd7 | 532 | command_nest_depth++; |
d318976c | 533 | ret = execute_control_command (current); |
16026cd7 | 534 | command_nest_depth--; |
d318976c FN |
535 | |
536 | /* If we got an error, get out. */ | |
537 | if (ret != simple_control) | |
538 | break; | |
539 | ||
540 | /* Get the next statement in the body. */ | |
541 | current = current->next; | |
542 | } | |
543 | ||
544 | break; | |
545 | } | |
40c03ae8 EZ |
546 | case commands_control: |
547 | { | |
548 | /* Breakpoint commands list, record the commands in the breakpoint's | |
549 | command list and return. */ | |
550 | new_line = insert_args (cmd->line); | |
551 | if (!new_line) | |
552 | break; | |
553 | make_cleanup (free_current_contents, &new_line); | |
554 | ret = commands_from_control_command (new_line, cmd); | |
555 | break; | |
556 | } | |
d57a3c85 TJB |
557 | case python_control: |
558 | { | |
559 | eval_python_from_control_command (cmd); | |
560 | ret = simple_control; | |
561 | break; | |
562 | } | |
d318976c FN |
563 | |
564 | default: | |
40c03ae8 | 565 | warning (_("Invalid control type in canned commands structure.")); |
4d2acc65 | 566 | break; |
d318976c FN |
567 | } |
568 | ||
4d2acc65 | 569 | do_cleanups (old_chain); |
d318976c FN |
570 | |
571 | return ret; | |
572 | } | |
573 | ||
d57a3c85 TJB |
574 | /* Like execute_control_command, but first set |
575 | suppress_next_print_command_trace. */ | |
576 | ||
577 | enum command_control_type | |
578 | execute_control_command_untraced (struct command_line *cmd) | |
579 | { | |
580 | suppress_next_print_command_trace = 1; | |
581 | return execute_control_command (cmd); | |
582 | } | |
583 | ||
584 | ||
d318976c FN |
585 | /* "while" command support. Executes a body of statements while the |
586 | loop condition is nonzero. */ | |
587 | ||
588 | void | |
589 | while_command (char *arg, int from_tty) | |
590 | { | |
591 | struct command_line *command = NULL; | |
592 | ||
593 | control_level = 1; | |
594 | command = get_command_line (while_control, arg); | |
595 | ||
596 | if (command == NULL) | |
597 | return; | |
598 | ||
d57a3c85 | 599 | execute_control_command_untraced (command); |
d318976c FN |
600 | free_command_lines (&command); |
601 | } | |
602 | ||
603 | /* "if" command support. Execute either the true or false arm depending | |
604 | on the value of the if conditional. */ | |
605 | ||
606 | void | |
607 | if_command (char *arg, int from_tty) | |
608 | { | |
609 | struct command_line *command = NULL; | |
610 | ||
611 | control_level = 1; | |
612 | command = get_command_line (if_control, arg); | |
613 | ||
614 | if (command == NULL) | |
615 | return; | |
616 | ||
d57a3c85 | 617 | execute_control_command_untraced (command); |
d318976c FN |
618 | free_command_lines (&command); |
619 | } | |
620 | ||
621 | /* Cleanup */ | |
622 | static void | |
623 | arg_cleanup (void *ignore) | |
624 | { | |
625 | struct user_args *oargs = user_args; | |
626 | if (!user_args) | |
8e65ff28 | 627 | internal_error (__FILE__, __LINE__, |
e2e0b3e5 | 628 | _("arg_cleanup called with no user args.\n")); |
d318976c FN |
629 | |
630 | user_args = user_args->next; | |
e28493f2 | 631 | xfree (oargs->command); |
b8c9b27d | 632 | xfree (oargs); |
d318976c FN |
633 | } |
634 | ||
635 | /* Bind the incomming arguments for a user defined command to | |
636 | $arg0, $arg1 ... $argMAXUSERARGS. */ | |
637 | ||
638 | static struct cleanup * | |
639 | setup_user_args (char *p) | |
640 | { | |
641 | struct user_args *args; | |
642 | struct cleanup *old_chain; | |
643 | unsigned int arg_count = 0; | |
644 | ||
645 | args = (struct user_args *) xmalloc (sizeof (struct user_args)); | |
646 | memset (args, 0, sizeof (struct user_args)); | |
647 | ||
648 | args->next = user_args; | |
649 | user_args = args; | |
650 | ||
651 | old_chain = make_cleanup (arg_cleanup, 0/*ignored*/); | |
652 | ||
653 | if (p == NULL) | |
654 | return old_chain; | |
655 | ||
e28493f2 AS |
656 | user_args->command = p = xstrdup (p); |
657 | ||
d318976c FN |
658 | while (*p) |
659 | { | |
660 | char *start_arg; | |
661 | int squote = 0; | |
662 | int dquote = 0; | |
663 | int bsquote = 0; | |
664 | ||
665 | if (arg_count >= MAXUSERARGS) | |
666 | { | |
8a3fe4f8 | 667 | error (_("user defined function may only have %d arguments."), |
d318976c FN |
668 | MAXUSERARGS); |
669 | return old_chain; | |
670 | } | |
671 | ||
672 | /* Strip whitespace. */ | |
673 | while (*p == ' ' || *p == '\t') | |
674 | p++; | |
675 | ||
676 | /* P now points to an argument. */ | |
677 | start_arg = p; | |
678 | user_args->a[arg_count].arg = p; | |
679 | ||
680 | /* Get to the end of this argument. */ | |
681 | while (*p) | |
682 | { | |
683 | if (((*p == ' ' || *p == '\t')) && !squote && !dquote && !bsquote) | |
684 | break; | |
685 | else | |
686 | { | |
687 | if (bsquote) | |
688 | bsquote = 0; | |
689 | else if (*p == '\\') | |
690 | bsquote = 1; | |
691 | else if (squote) | |
692 | { | |
693 | if (*p == '\'') | |
694 | squote = 0; | |
695 | } | |
696 | else if (dquote) | |
697 | { | |
698 | if (*p == '"') | |
699 | dquote = 0; | |
700 | } | |
701 | else | |
702 | { | |
703 | if (*p == '\'') | |
704 | squote = 1; | |
705 | else if (*p == '"') | |
706 | dquote = 1; | |
707 | } | |
708 | p++; | |
709 | } | |
710 | } | |
711 | ||
712 | user_args->a[arg_count].len = p - start_arg; | |
713 | arg_count++; | |
714 | user_args->count++; | |
715 | } | |
716 | return old_chain; | |
717 | } | |
718 | ||
719 | /* Given character string P, return a point to the first argument ($arg), | |
720 | or NULL if P contains no arguments. */ | |
721 | ||
722 | static char * | |
723 | locate_arg (char *p) | |
724 | { | |
725 | while ((p = strchr (p, '$'))) | |
726 | { | |
c03c782f AS |
727 | if (strncmp (p, "$arg", 4) == 0 |
728 | && (isdigit (p[4]) || p[4] == 'c')) | |
d318976c FN |
729 | return p; |
730 | p++; | |
731 | } | |
732 | return NULL; | |
733 | } | |
734 | ||
735 | /* Insert the user defined arguments stored in user_arg into the $arg | |
736 | arguments found in line, with the updated copy being placed into nline. */ | |
737 | ||
738 | static char * | |
739 | insert_args (char *line) | |
740 | { | |
741 | char *p, *save_line, *new_line; | |
742 | unsigned len, i; | |
743 | ||
61d9b92f DJ |
744 | /* If we are not in a user-defined function, treat $argc, $arg0, et |
745 | cetera as normal convenience variables. */ | |
746 | if (user_args == NULL) | |
747 | return xstrdup (line); | |
748 | ||
d318976c FN |
749 | /* First we need to know how much memory to allocate for the new line. */ |
750 | save_line = line; | |
751 | len = 0; | |
752 | while ((p = locate_arg (line))) | |
753 | { | |
754 | len += p - line; | |
755 | i = p[4] - '0'; | |
756 | ||
c03c782f AS |
757 | if (p[4] == 'c') |
758 | { | |
759 | /* $argc. Number will be <=10. */ | |
760 | len += user_args->count == 10 ? 2 : 1; | |
761 | } | |
762 | else if (i >= user_args->count) | |
d318976c | 763 | { |
8a3fe4f8 | 764 | error (_("Missing argument %d in user function."), i); |
d318976c FN |
765 | return NULL; |
766 | } | |
c03c782f AS |
767 | else |
768 | { | |
769 | len += user_args->a[i].len; | |
770 | } | |
d318976c FN |
771 | line = p + 5; |
772 | } | |
773 | ||
774 | /* Don't forget the tail. */ | |
775 | len += strlen (line); | |
776 | ||
777 | /* Allocate space for the new line and fill it in. */ | |
778 | new_line = (char *) xmalloc (len + 1); | |
779 | if (new_line == NULL) | |
780 | return NULL; | |
781 | ||
782 | /* Restore pointer to beginning of old line. */ | |
783 | line = save_line; | |
784 | ||
785 | /* Save pointer to beginning of new line. */ | |
786 | save_line = new_line; | |
787 | ||
788 | while ((p = locate_arg (line))) | |
789 | { | |
790 | int i, len; | |
791 | ||
792 | memcpy (new_line, line, p - line); | |
793 | new_line += p - line; | |
d318976c | 794 | |
c03c782f AS |
795 | if (p[4] == 'c') |
796 | { | |
797 | gdb_assert (user_args->count >= 0 && user_args->count <= 10); | |
798 | if (user_args->count == 10) | |
799 | { | |
800 | *(new_line++) = '1'; | |
801 | *(new_line++) = '0'; | |
802 | } | |
803 | else | |
804 | *(new_line++) = user_args->count + '0'; | |
805 | } | |
806 | else | |
d318976c | 807 | { |
c03c782f AS |
808 | i = p[4] - '0'; |
809 | len = user_args->a[i].len; | |
810 | if (len) | |
811 | { | |
812 | memcpy (new_line, user_args->a[i].arg, len); | |
813 | new_line += len; | |
814 | } | |
d318976c FN |
815 | } |
816 | line = p + 5; | |
817 | } | |
818 | /* Don't forget the tail. */ | |
819 | strcpy (new_line, line); | |
820 | ||
821 | /* Return a pointer to the beginning of the new line. */ | |
822 | return save_line; | |
823 | } | |
824 | ||
825 | \f | |
826 | /* Expand the body_list of COMMAND so that it can hold NEW_LENGTH | |
827 | code bodies. This is typically used when we encounter an "else" | |
828 | clause for an "if" command. */ | |
829 | ||
830 | static void | |
831 | realloc_body_list (struct command_line *command, int new_length) | |
832 | { | |
833 | int n; | |
834 | struct command_line **body_list; | |
835 | ||
836 | n = command->body_count; | |
837 | ||
838 | /* Nothing to do? */ | |
839 | if (new_length <= n) | |
840 | return; | |
841 | ||
842 | body_list = (struct command_line **) | |
843 | xmalloc (sizeof (struct command_line *) * new_length); | |
844 | ||
845 | memcpy (body_list, command->body_list, sizeof (struct command_line *) * n); | |
42b575e5 | 846 | memset (body_list + n, 0, sizeof (struct command_line *) * (new_length - n)); |
d318976c | 847 | |
b8c9b27d | 848 | xfree (command->body_list); |
d318976c FN |
849 | command->body_list = body_list; |
850 | command->body_count = new_length; | |
851 | } | |
852 | ||
3c1179ff VP |
853 | /* Read next line from stdout. Passed to read_command_line_1 and |
854 | recurse_read_control_structure whenever we need to read commands | |
855 | from stdout. */ | |
d318976c | 856 | |
3c1179ff | 857 | static char * |
a58d7472 | 858 | read_next_line (void) |
d318976c | 859 | { |
3c1179ff | 860 | char *prompt_ptr, control_prompt[256]; |
d318976c FN |
861 | int i = 0; |
862 | ||
863 | if (control_level >= 254) | |
8a3fe4f8 | 864 | error (_("Control nesting too deep!")); |
d318976c FN |
865 | |
866 | /* Set a prompt based on the nesting of the control commands. */ | |
9a4105ab | 867 | if (instream == stdin || (instream == 0 && deprecated_readline_hook != NULL)) |
d318976c FN |
868 | { |
869 | for (i = 0; i < control_level; i++) | |
870 | control_prompt[i] = ' '; | |
871 | control_prompt[i] = '>'; | |
872 | control_prompt[i + 1] = '\0'; | |
873 | prompt_ptr = (char *) &control_prompt[0]; | |
874 | } | |
875 | else | |
876 | prompt_ptr = NULL; | |
877 | ||
3c1179ff VP |
878 | return command_line_input (prompt_ptr, instream == stdin, "commands"); |
879 | } | |
880 | ||
881 | /* Process one input line. If the command is an "end", | |
882 | return such an indication to the caller. If PARSE_COMMANDS is true, | |
883 | strip leading whitespace (trailing whitespace is always stripped) | |
884 | in the line, attempt to recognize GDB control commands, and also | |
885 | return an indication if the command is an "else" or a nop. | |
886 | Otherwise, only "end" is recognized. */ | |
887 | ||
888 | static enum misc_command_type | |
a7bdde9e VP |
889 | process_next_line (char *p, struct command_line **command, int parse_commands, |
890 | void (*validator)(char *, void *), void *closure) | |
3c1179ff | 891 | { |
50cb2941 JK |
892 | char *p_end; |
893 | char *p_start; | |
3c1179ff | 894 | int not_handled = 0; |
d318976c FN |
895 | |
896 | /* Not sure what to do here. */ | |
897 | if (p == NULL) | |
898 | return end_command; | |
899 | ||
311a4e6b | 900 | /* Strip trailing whitespace. */ |
50cb2941 JK |
901 | p_end = p + strlen (p); |
902 | while (p_end > p && (p_end[-1] == ' ' || p_end[-1] == '\t')) | |
903 | p_end--; | |
d318976c | 904 | |
50cb2941 | 905 | p_start = p; |
3630a92d | 906 | /* Strip leading whitespace. */ |
50cb2941 JK |
907 | while (p_start < p_end && (*p_start == ' ' || *p_start == '\t')) |
908 | p_start++; | |
d318976c | 909 | |
3630a92d VP |
910 | /* 'end' is always recognized, regardless of parse_commands value. |
911 | We also permit whitespace before end and after. */ | |
50cb2941 | 912 | if (p_end - p_start == 3 && !strncmp (p_start, "end", 3)) |
3630a92d VP |
913 | return end_command; |
914 | ||
311a4e6b | 915 | if (parse_commands) |
d318976c | 916 | { |
3630a92d VP |
917 | /* If commands are parsed, we skip initial spaces. Otherwise, |
918 | which is the case for Python commands and documentation | |
919 | (see the 'document' command), spaces are preserved. */ | |
50cb2941 | 920 | p = p_start; |
3630a92d | 921 | |
311a4e6b TJB |
922 | /* Blanks and comments don't really do anything, but we need to |
923 | distinguish them from else, end and other commands which can be | |
924 | executed. */ | |
50cb2941 | 925 | if (p_end == p || p[0] == '#') |
311a4e6b TJB |
926 | return nop_command; |
927 | ||
928 | /* Is the else clause of an if control structure? */ | |
50cb2941 | 929 | if (p_end - p == 4 && !strncmp (p, "else", 4)) |
311a4e6b TJB |
930 | return else_command; |
931 | ||
932 | /* Check for while, if, break, continue, etc and build a new command | |
933 | line structure for them. */ | |
a7bdde9e VP |
934 | if ((p_end - p >= 14 && !strncmp (p, "while-stepping", 14)) |
935 | || (p_end -p >= 2 && !strncmp (p, "ws", 2))) | |
936 | { | |
937 | /* Because validate_actionline and encode_action lookup | |
938 | command's line as command, we need the line to | |
939 | include 'while-stepping'. | |
940 | ||
941 | For 'ws' alias, the command will have 'ws', not expanded | |
942 | to 'while-stepping'. This is intentional -- we don't | |
943 | really want frontend to send a command list with 'ws', | |
944 | and next break-info returning command line with 'while-stepping'. | |
945 | This should work, but might cause the breakpoint to be marked as | |
946 | changed while it's actually not. */ | |
947 | *command = build_command_line (while_stepping_control, p); | |
948 | } | |
949 | else if (p_end - p > 5 && !strncmp (p, "while", 5)) | |
311a4e6b TJB |
950 | { |
951 | char *first_arg; | |
952 | first_arg = p + 5; | |
50cb2941 | 953 | while (first_arg < p_end && isspace (*first_arg)) |
311a4e6b TJB |
954 | first_arg++; |
955 | *command = build_command_line (while_control, first_arg); | |
956 | } | |
50cb2941 | 957 | else if (p_end - p > 2 && !strncmp (p, "if", 2)) |
311a4e6b TJB |
958 | { |
959 | char *first_arg; | |
960 | first_arg = p + 2; | |
50cb2941 | 961 | while (first_arg < p_end && isspace (*first_arg)) |
311a4e6b TJB |
962 | first_arg++; |
963 | *command = build_command_line (if_control, first_arg); | |
964 | } | |
50cb2941 | 965 | else if (p_end - p >= 8 && !strncmp (p, "commands", 8)) |
311a4e6b TJB |
966 | { |
967 | char *first_arg; | |
968 | first_arg = p + 8; | |
50cb2941 | 969 | while (first_arg < p_end && isspace (*first_arg)) |
311a4e6b TJB |
970 | first_arg++; |
971 | *command = build_command_line (commands_control, first_arg); | |
972 | } | |
50cb2941 | 973 | else if (p_end - p == 6 && !strncmp (p, "python", 6)) |
311a4e6b TJB |
974 | { |
975 | /* Note that we ignore the inline "python command" form | |
976 | here. */ | |
977 | *command = build_command_line (python_control, ""); | |
978 | } | |
50cb2941 | 979 | else if (p_end - p == 10 && !strncmp (p, "loop_break", 10)) |
311a4e6b TJB |
980 | { |
981 | *command = (struct command_line *) | |
982 | xmalloc (sizeof (struct command_line)); | |
983 | (*command)->next = NULL; | |
984 | (*command)->line = NULL; | |
985 | (*command)->control_type = break_control; | |
986 | (*command)->body_count = 0; | |
987 | (*command)->body_list = NULL; | |
988 | } | |
50cb2941 | 989 | else if (p_end - p == 13 && !strncmp (p, "loop_continue", 13)) |
311a4e6b TJB |
990 | { |
991 | *command = (struct command_line *) | |
992 | xmalloc (sizeof (struct command_line)); | |
993 | (*command)->next = NULL; | |
994 | (*command)->line = NULL; | |
995 | (*command)->control_type = continue_control; | |
996 | (*command)->body_count = 0; | |
997 | (*command)->body_list = NULL; | |
998 | } | |
999 | else | |
1000 | not_handled = 1; | |
d318976c | 1001 | } |
311a4e6b TJB |
1002 | |
1003 | if (!parse_commands || not_handled) | |
d318976c FN |
1004 | { |
1005 | /* A normal command. */ | |
1006 | *command = (struct command_line *) | |
1007 | xmalloc (sizeof (struct command_line)); | |
1008 | (*command)->next = NULL; | |
50cb2941 | 1009 | (*command)->line = savestring (p, p_end - p); |
d318976c FN |
1010 | (*command)->control_type = simple_control; |
1011 | (*command)->body_count = 0; | |
1012 | (*command)->body_list = NULL; | |
1013 | } | |
1014 | ||
a7bdde9e VP |
1015 | if (validator) |
1016 | { | |
1017 | volatile struct gdb_exception ex; | |
1018 | TRY_CATCH (ex, RETURN_MASK_ALL) | |
1019 | { | |
1020 | validator ((*command)->line, closure); | |
1021 | } | |
1022 | if (ex.reason < 0) | |
1023 | { | |
1024 | xfree (*command); | |
1025 | throw_exception (ex); | |
1026 | } | |
1027 | } | |
1028 | ||
d318976c FN |
1029 | /* Nothing special. */ |
1030 | return ok_command; | |
1031 | } | |
1032 | ||
1033 | /* Recursively read in the control structures and create a command_line | |
3c1179ff VP |
1034 | structure from them. Use read_next_line_func to obtain lines of |
1035 | the command. | |
d318976c | 1036 | |
3c1179ff | 1037 | */ |
d318976c FN |
1038 | |
1039 | static enum command_control_type | |
a58d7472 | 1040 | recurse_read_control_structure (char * (*read_next_line_func) (void), |
a7bdde9e VP |
1041 | struct command_line *current_cmd, |
1042 | void (*validator)(char *, void *), | |
1043 | void *closure) | |
d318976c FN |
1044 | { |
1045 | int current_body, i; | |
1046 | enum misc_command_type val; | |
1047 | enum command_control_type ret; | |
1048 | struct command_line **body_ptr, *child_tail, *next; | |
3c1179ff | 1049 | char *p; |
d318976c FN |
1050 | |
1051 | child_tail = NULL; | |
1052 | current_body = 1; | |
1053 | ||
1054 | /* Sanity checks. */ | |
1055 | if (current_cmd->control_type == simple_control) | |
8a3fe4f8 | 1056 | error (_("Recursed on a simple control type.")); |
d318976c FN |
1057 | |
1058 | if (current_body > current_cmd->body_count) | |
8a3fe4f8 | 1059 | error (_("Allocated body is smaller than this command type needs.")); |
d318976c FN |
1060 | |
1061 | /* Read lines from the input stream and build control structures. */ | |
1062 | while (1) | |
1063 | { | |
1064 | dont_repeat (); | |
1065 | ||
1066 | next = NULL; | |
3c1179ff | 1067 | val = process_next_line (read_next_line_func (), &next, |
a7bdde9e VP |
1068 | current_cmd->control_type != python_control, |
1069 | validator, closure); | |
d318976c FN |
1070 | |
1071 | /* Just skip blanks and comments. */ | |
1072 | if (val == nop_command) | |
1073 | continue; | |
1074 | ||
1075 | if (val == end_command) | |
1076 | { | |
1077 | if (current_cmd->control_type == while_control | |
a7bdde9e | 1078 | || current_cmd->control_type == while_stepping_control |
40c03ae8 | 1079 | || current_cmd->control_type == if_control |
d57a3c85 | 1080 | || current_cmd->control_type == python_control |
40c03ae8 | 1081 | || current_cmd->control_type == commands_control) |
d318976c | 1082 | { |
40c03ae8 | 1083 | /* Success reading an entire canned sequence of commands. */ |
d318976c FN |
1084 | ret = simple_control; |
1085 | break; | |
1086 | } | |
1087 | else | |
1088 | { | |
1089 | ret = invalid_control; | |
1090 | break; | |
1091 | } | |
1092 | } | |
1093 | ||
1094 | /* Not the end of a control structure. */ | |
1095 | if (val == else_command) | |
1096 | { | |
1097 | if (current_cmd->control_type == if_control | |
1098 | && current_body == 1) | |
1099 | { | |
1100 | realloc_body_list (current_cmd, 2); | |
1101 | current_body = 2; | |
1102 | child_tail = NULL; | |
1103 | continue; | |
1104 | } | |
1105 | else | |
1106 | { | |
1107 | ret = invalid_control; | |
1108 | break; | |
1109 | } | |
1110 | } | |
1111 | ||
1112 | if (child_tail) | |
1113 | { | |
1114 | child_tail->next = next; | |
1115 | } | |
1116 | else | |
1117 | { | |
1118 | body_ptr = current_cmd->body_list; | |
1119 | for (i = 1; i < current_body; i++) | |
1120 | body_ptr++; | |
1121 | ||
1122 | *body_ptr = next; | |
1123 | ||
1124 | } | |
1125 | ||
1126 | child_tail = next; | |
1127 | ||
1128 | /* If the latest line is another control structure, then recurse | |
1129 | on it. */ | |
1130 | if (next->control_type == while_control | |
a7bdde9e | 1131 | || next->control_type == while_stepping_control |
40c03ae8 | 1132 | || next->control_type == if_control |
d57a3c85 | 1133 | || next->control_type == python_control |
40c03ae8 | 1134 | || next->control_type == commands_control) |
d318976c FN |
1135 | { |
1136 | control_level++; | |
a7bdde9e VP |
1137 | ret = recurse_read_control_structure (read_next_line_func, next, |
1138 | validator, closure); | |
d318976c FN |
1139 | control_level--; |
1140 | ||
1141 | if (ret != simple_control) | |
1142 | break; | |
1143 | } | |
1144 | } | |
1145 | ||
1146 | dont_repeat (); | |
1147 | ||
1148 | return ret; | |
1149 | } | |
1150 | ||
1151 | /* Read lines from the input stream and accumulate them in a chain of | |
1152 | struct command_line's, which is then returned. For input from a | |
1153 | terminal, the special command "end" is used to mark the end of the | |
311a4e6b TJB |
1154 | input, and is not included in the returned chain of commands. |
1155 | ||
1156 | If PARSE_COMMANDS is true, strip leading whitespace (trailing whitespace | |
1157 | is always stripped) in the line and attempt to recognize GDB control | |
1158 | commands. Otherwise, only "end" is recognized. */ | |
d318976c FN |
1159 | |
1160 | #define END_MESSAGE "End with a line saying just \"end\"." | |
1161 | ||
1162 | struct command_line * | |
a7bdde9e VP |
1163 | read_command_lines (char *prompt_arg, int from_tty, int parse_commands, |
1164 | void (*validator)(char *, void *), void *closure) | |
d318976c | 1165 | { |
3c1179ff | 1166 | struct command_line *head; |
698ba934 DJ |
1167 | |
1168 | if (from_tty && input_from_terminal_p ()) | |
d318976c | 1169 | { |
698ba934 DJ |
1170 | if (deprecated_readline_begin_hook) |
1171 | { | |
1172 | /* Note - intentional to merge messages with no newline */ | |
1173 | (*deprecated_readline_begin_hook) ("%s %s\n", prompt_arg, END_MESSAGE); | |
1174 | } | |
1175 | else | |
1176 | { | |
1177 | printf_unfiltered ("%s\n%s\n", prompt_arg, END_MESSAGE); | |
1178 | gdb_flush (gdb_stdout); | |
1179 | } | |
d318976c FN |
1180 | } |
1181 | ||
a7bdde9e VP |
1182 | head = read_command_lines_1 (read_next_line, parse_commands, |
1183 | validator, closure); | |
3c1179ff VP |
1184 | |
1185 | if (deprecated_readline_end_hook && from_tty && input_from_terminal_p ()) | |
1186 | { | |
1187 | (*deprecated_readline_end_hook) (); | |
1188 | } | |
1189 | return (head); | |
1190 | } | |
1191 | ||
1192 | /* Act the same way as read_command_lines, except that each new line is | |
1193 | obtained using READ_NEXT_LINE_FUNC. */ | |
1194 | ||
1195 | struct command_line * | |
a7bdde9e VP |
1196 | read_command_lines_1 (char * (*read_next_line_func) (void), int parse_commands, |
1197 | void (*validator)(char *, void *), void *closure) | |
3c1179ff VP |
1198 | { |
1199 | struct command_line *head, *tail, *next; | |
1200 | struct cleanup *old_chain; | |
1201 | enum command_control_type ret; | |
1202 | enum misc_command_type val; | |
1203 | ||
1204 | control_level = 0; | |
d318976c FN |
1205 | head = tail = NULL; |
1206 | old_chain = NULL; | |
1207 | ||
1208 | while (1) | |
1209 | { | |
f429d7d0 | 1210 | dont_repeat (); |
a7bdde9e VP |
1211 | val = process_next_line (read_next_line_func (), &next, parse_commands, |
1212 | validator, closure); | |
d318976c FN |
1213 | |
1214 | /* Ignore blank lines or comments. */ | |
1215 | if (val == nop_command) | |
1216 | continue; | |
1217 | ||
1218 | if (val == end_command) | |
1219 | { | |
1220 | ret = simple_control; | |
1221 | break; | |
1222 | } | |
1223 | ||
1224 | if (val != ok_command) | |
1225 | { | |
1226 | ret = invalid_control; | |
1227 | break; | |
1228 | } | |
1229 | ||
1230 | if (next->control_type == while_control | |
40c03ae8 | 1231 | || next->control_type == if_control |
d57a3c85 | 1232 | || next->control_type == python_control |
a7bdde9e VP |
1233 | || next->control_type == commands_control |
1234 | || next->control_type == while_stepping_control) | |
d318976c FN |
1235 | { |
1236 | control_level++; | |
a7bdde9e VP |
1237 | ret = recurse_read_control_structure (read_next_line_func, next, |
1238 | validator, closure); | |
d318976c FN |
1239 | control_level--; |
1240 | ||
1241 | if (ret == invalid_control) | |
1242 | break; | |
1243 | } | |
1244 | ||
1245 | if (tail) | |
1246 | { | |
1247 | tail->next = next; | |
1248 | } | |
1249 | else | |
1250 | { | |
1251 | head = next; | |
1252 | old_chain = make_cleanup_free_command_lines (&head); | |
1253 | } | |
1254 | tail = next; | |
1255 | } | |
1256 | ||
1257 | dont_repeat (); | |
1258 | ||
1259 | if (head) | |
1260 | { | |
1261 | if (ret != invalid_control) | |
1262 | { | |
1263 | discard_cleanups (old_chain); | |
1264 | } | |
1265 | else | |
1266 | do_cleanups (old_chain); | |
1267 | } | |
1268 | ||
3c1179ff | 1269 | return head; |
d318976c FN |
1270 | } |
1271 | ||
1272 | /* Free a chain of struct command_line's. */ | |
1273 | ||
1274 | void | |
1275 | free_command_lines (struct command_line **lptr) | |
1276 | { | |
d5b5ac79 AC |
1277 | struct command_line *l = *lptr; |
1278 | struct command_line *next; | |
d318976c FN |
1279 | struct command_line **blist; |
1280 | int i; | |
1281 | ||
1282 | while (l) | |
1283 | { | |
1284 | if (l->body_count > 0) | |
1285 | { | |
1286 | blist = l->body_list; | |
1287 | for (i = 0; i < l->body_count; i++, blist++) | |
1288 | free_command_lines (blist); | |
1289 | } | |
1290 | next = l->next; | |
b8c9b27d KB |
1291 | xfree (l->line); |
1292 | xfree (l); | |
d318976c FN |
1293 | l = next; |
1294 | } | |
0d70f41b | 1295 | *lptr = NULL; |
d318976c FN |
1296 | } |
1297 | ||
1298 | static void | |
1299 | do_free_command_lines_cleanup (void *arg) | |
1300 | { | |
1301 | free_command_lines (arg); | |
1302 | } | |
1303 | ||
6c50ab1c | 1304 | struct cleanup * |
d318976c FN |
1305 | make_cleanup_free_command_lines (struct command_line **arg) |
1306 | { | |
1307 | return make_cleanup (do_free_command_lines_cleanup, arg); | |
1308 | } | |
c2b8ed2c MS |
1309 | |
1310 | struct command_line * | |
1311 | copy_command_lines (struct command_line *cmds) | |
1312 | { | |
1313 | struct command_line *result = NULL; | |
1314 | ||
1315 | if (cmds) | |
1316 | { | |
1317 | result = (struct command_line *) xmalloc (sizeof (struct command_line)); | |
1318 | ||
1319 | result->next = copy_command_lines (cmds->next); | |
1320 | result->line = xstrdup (cmds->line); | |
1321 | result->control_type = cmds->control_type; | |
1322 | result->body_count = cmds->body_count; | |
1323 | if (cmds->body_count > 0) | |
1324 | { | |
1325 | int i; | |
1326 | ||
1327 | result->body_list = (struct command_line **) | |
1328 | xmalloc (sizeof (struct command_line *) * cmds->body_count); | |
1329 | ||
1330 | for (i = 0; i < cmds->body_count; i++) | |
1331 | result->body_list[i] = copy_command_lines (cmds->body_list[i]); | |
1332 | } | |
1333 | else | |
1334 | result->body_list = NULL; | |
1335 | } | |
1336 | ||
1337 | return result; | |
1338 | } | |
d318976c | 1339 | \f |
adb483fe DJ |
1340 | /* Validate that *COMNAME is a valid name for a command. Return the |
1341 | containing command list, in case it starts with a prefix command. | |
1342 | The prefix must already exist. *COMNAME is advanced to point after | |
1343 | any prefix, and a NUL character overwrites the space after the | |
1344 | prefix. */ | |
1345 | ||
1346 | static struct cmd_list_element ** | |
1347 | validate_comname (char **comname) | |
d318976c | 1348 | { |
adb483fe DJ |
1349 | struct cmd_list_element **list = &cmdlist; |
1350 | char *p, *last_word; | |
d318976c | 1351 | |
adb483fe | 1352 | if (*comname == 0) |
e2e0b3e5 | 1353 | error_no_arg (_("name of command to define")); |
d318976c | 1354 | |
adb483fe DJ |
1355 | /* Find the last word of the argument. */ |
1356 | p = *comname + strlen (*comname); | |
1357 | while (p > *comname && isspace (p[-1])) | |
1358 | p--; | |
1359 | while (p > *comname && !isspace (p[-1])) | |
1360 | p--; | |
1361 | last_word = p; | |
1362 | ||
1363 | /* Find the corresponding command list. */ | |
1364 | if (last_word != *comname) | |
1365 | { | |
1366 | struct cmd_list_element *c; | |
1367 | char saved_char, *tem = *comname; | |
1368 | ||
1369 | /* Separate the prefix and the command. */ | |
1370 | saved_char = last_word[-1]; | |
1371 | last_word[-1] = '\0'; | |
1372 | ||
1373 | c = lookup_cmd (&tem, cmdlist, "", 0, 1); | |
1374 | if (c->prefixlist == NULL) | |
1375 | error (_("\"%s\" is not a prefix command."), *comname); | |
1376 | ||
1377 | list = c->prefixlist; | |
1378 | last_word[-1] = saved_char; | |
1379 | *comname = last_word; | |
1380 | } | |
1381 | ||
1382 | p = *comname; | |
d318976c FN |
1383 | while (*p) |
1384 | { | |
1385 | if (!isalnum (*p) && *p != '-' && *p != '_') | |
8a3fe4f8 | 1386 | error (_("Junk in argument list: \"%s\""), p); |
d318976c FN |
1387 | p++; |
1388 | } | |
adb483fe DJ |
1389 | |
1390 | return list; | |
d318976c FN |
1391 | } |
1392 | ||
1393 | /* This is just a placeholder in the command data structures. */ | |
1394 | static void | |
1395 | user_defined_command (char *ignore, int from_tty) | |
1396 | { | |
1397 | } | |
1398 | ||
1399 | void | |
1400 | define_command (char *comname, int from_tty) | |
1401 | { | |
1402 | #define MAX_TMPBUF 128 | |
1403 | enum cmd_hook_type | |
1404 | { | |
1405 | CMD_NO_HOOK = 0, | |
1406 | CMD_PRE_HOOK, | |
1407 | CMD_POST_HOOK | |
1408 | }; | |
d5b5ac79 | 1409 | struct command_line *cmds; |
adb483fe DJ |
1410 | struct cmd_list_element *c, *newc, *oldc, *hookc = 0, **list; |
1411 | char *tem, *tem2, *comfull; | |
d318976c FN |
1412 | char tmpbuf[MAX_TMPBUF]; |
1413 | int hook_type = CMD_NO_HOOK; | |
1414 | int hook_name_size = 0; | |
1415 | ||
1416 | #define HOOK_STRING "hook-" | |
1417 | #define HOOK_LEN 5 | |
1418 | #define HOOK_POST_STRING "hookpost-" | |
1419 | #define HOOK_POST_LEN 9 | |
1420 | ||
adb483fe DJ |
1421 | comfull = comname; |
1422 | list = validate_comname (&comname); | |
d318976c FN |
1423 | |
1424 | /* Look it up, and verify that we got an exact match. */ | |
adb483fe DJ |
1425 | tem = comname; |
1426 | c = lookup_cmd (&tem, *list, "", -1, 1); | |
5cb316ef | 1427 | if (c && strcmp (comname, c->name) != 0) |
d318976c FN |
1428 | c = 0; |
1429 | ||
1430 | if (c) | |
1431 | { | |
ab4e3d93 | 1432 | int q; |
d318976c | 1433 | if (c->class == class_user || c->class == class_alias) |
e2e0b3e5 | 1434 | q = query (_("Redefine command \"%s\"? "), c->name); |
d318976c | 1435 | else |
e2e0b3e5 | 1436 | q = query (_("Really redefine built-in command \"%s\"? "), c->name); |
ab4e3d93 | 1437 | if (!q) |
8a3fe4f8 | 1438 | error (_("Command \"%s\" not redefined."), c->name); |
d318976c FN |
1439 | } |
1440 | ||
1441 | /* If this new command is a hook, then mark the command which it | |
1442 | is hooking. Note that we allow hooking `help' commands, so that | |
1443 | we can hook the `stop' pseudo-command. */ | |
1444 | ||
1445 | if (!strncmp (comname, HOOK_STRING, HOOK_LEN)) | |
1446 | { | |
1447 | hook_type = CMD_PRE_HOOK; | |
1448 | hook_name_size = HOOK_LEN; | |
1449 | } | |
1450 | else if (!strncmp (comname, HOOK_POST_STRING, HOOK_POST_LEN)) | |
1451 | { | |
1452 | hook_type = CMD_POST_HOOK; | |
1453 | hook_name_size = HOOK_POST_LEN; | |
1454 | } | |
1455 | ||
1456 | if (hook_type != CMD_NO_HOOK) | |
1457 | { | |
1458 | /* Look up cmd it hooks, and verify that we got an exact match. */ | |
1459 | tem = comname + hook_name_size; | |
adb483fe | 1460 | hookc = lookup_cmd (&tem, *list, "", -1, 0); |
5cb316ef | 1461 | if (hookc && strcmp (comname + hook_name_size, hookc->name) != 0) |
d318976c FN |
1462 | hookc = 0; |
1463 | if (!hookc) | |
1464 | { | |
8a3fe4f8 | 1465 | warning (_("Your new `%s' command does not hook any existing command."), |
adb483fe | 1466 | comfull); |
9e2f0ad4 | 1467 | if (!query (_("Proceed? "))) |
8a3fe4f8 | 1468 | error (_("Not confirmed.")); |
d318976c FN |
1469 | } |
1470 | } | |
1471 | ||
1b36a34b | 1472 | comname = xstrdup (comname); |
d318976c FN |
1473 | |
1474 | /* If the rest of the commands will be case insensitive, this one | |
1475 | should behave in the same manner. */ | |
1476 | for (tem = comname; *tem; tem++) | |
1477 | if (isupper (*tem)) | |
1478 | *tem = tolower (*tem); | |
1479 | ||
adb483fe | 1480 | sprintf (tmpbuf, "Type commands for definition of \"%s\".", comfull); |
a7bdde9e | 1481 | cmds = read_command_lines (tmpbuf, from_tty, 1, 0, 0); |
d318976c FN |
1482 | |
1483 | if (c && c->class == class_user) | |
1484 | free_command_lines (&c->user_commands); | |
1485 | ||
1486 | newc = add_cmd (comname, class_user, user_defined_command, | |
1487 | (c && c->class == class_user) | |
1b36a34b | 1488 | ? c->doc : xstrdup ("User-defined."), list); |
d318976c FN |
1489 | newc->user_commands = cmds; |
1490 | ||
1491 | /* If this new command is a hook, then mark both commands as being | |
1492 | tied. */ | |
1493 | if (hookc) | |
1494 | { | |
1495 | switch (hook_type) | |
1496 | { | |
1497 | case CMD_PRE_HOOK: | |
1498 | hookc->hook_pre = newc; /* Target gets hooked. */ | |
1499 | newc->hookee_pre = hookc; /* We are marked as hooking target cmd. */ | |
1500 | break; | |
1501 | case CMD_POST_HOOK: | |
f48ff60a FN |
1502 | hookc->hook_post = newc; /* Target gets hooked. */ |
1503 | newc->hookee_post = hookc; /* We are marked as hooking target cmd. */ | |
d318976c FN |
1504 | break; |
1505 | default: | |
1506 | /* Should never come here as hookc would be 0. */ | |
e2e0b3e5 | 1507 | internal_error (__FILE__, __LINE__, _("bad switch")); |
d318976c FN |
1508 | } |
1509 | } | |
1510 | } | |
1511 | ||
1512 | void | |
1513 | document_command (char *comname, int from_tty) | |
1514 | { | |
1515 | struct command_line *doclines; | |
adb483fe DJ |
1516 | struct cmd_list_element *c, **list; |
1517 | char *tem, *comfull; | |
d318976c FN |
1518 | char tmpbuf[128]; |
1519 | ||
adb483fe DJ |
1520 | comfull = comname; |
1521 | list = validate_comname (&comname); | |
d318976c | 1522 | |
adb483fe DJ |
1523 | tem = comname; |
1524 | c = lookup_cmd (&tem, *list, "", 0, 1); | |
d318976c FN |
1525 | |
1526 | if (c->class != class_user) | |
adb483fe | 1527 | error (_("Command \"%s\" is built-in."), comfull); |
d318976c | 1528 | |
adb483fe | 1529 | sprintf (tmpbuf, "Type documentation for \"%s\".", comfull); |
a7bdde9e | 1530 | doclines = read_command_lines (tmpbuf, from_tty, 0, 0, 0); |
d318976c FN |
1531 | |
1532 | if (c->doc) | |
b8c9b27d | 1533 | xfree (c->doc); |
d318976c FN |
1534 | |
1535 | { | |
d5b5ac79 AC |
1536 | struct command_line *cl1; |
1537 | int len = 0; | |
d318976c FN |
1538 | |
1539 | for (cl1 = doclines; cl1; cl1 = cl1->next) | |
1540 | len += strlen (cl1->line) + 1; | |
1541 | ||
1542 | c->doc = (char *) xmalloc (len + 1); | |
1543 | *c->doc = 0; | |
1544 | ||
1545 | for (cl1 = doclines; cl1; cl1 = cl1->next) | |
1546 | { | |
1547 | strcat (c->doc, cl1->line); | |
1548 | if (cl1->next) | |
1549 | strcat (c->doc, "\n"); | |
1550 | } | |
1551 | } | |
1552 | ||
1553 | free_command_lines (&doclines); | |
1554 | } | |
1555 | \f | |
1556 | struct source_cleanup_lines_args | |
1557 | { | |
1558 | int old_line; | |
1559 | char *old_file; | |
d318976c FN |
1560 | }; |
1561 | ||
1562 | static void | |
4efb68b1 | 1563 | source_cleanup_lines (void *args) |
d318976c FN |
1564 | { |
1565 | struct source_cleanup_lines_args *p = | |
1566 | (struct source_cleanup_lines_args *) args; | |
1567 | source_line_number = p->old_line; | |
1568 | source_file_name = p->old_file; | |
d318976c FN |
1569 | } |
1570 | ||
17d92a02 AC |
1571 | struct wrapped_read_command_file_args |
1572 | { | |
1573 | FILE *stream; | |
1574 | }; | |
1575 | ||
1576 | static void | |
1577 | wrapped_read_command_file (struct ui_out *uiout, void *data) | |
1578 | { | |
1579 | struct wrapped_read_command_file_args *args = data; | |
1580 | read_command_file (args->stream); | |
1581 | } | |
1582 | ||
d318976c FN |
1583 | /* Used to implement source_command */ |
1584 | ||
1585 | void | |
1586 | script_from_file (FILE *stream, char *file) | |
1587 | { | |
1588 | struct cleanup *old_cleanups; | |
1589 | struct source_cleanup_lines_args old_lines; | |
1590 | int needed_length; | |
1591 | ||
1592 | if (stream == NULL) | |
e2e0b3e5 | 1593 | internal_error (__FILE__, __LINE__, _("called with NULL file pointer!")); |
d318976c | 1594 | |
7c8a8b04 | 1595 | old_cleanups = make_cleanup_fclose (stream); |
d318976c FN |
1596 | |
1597 | old_lines.old_line = source_line_number; | |
1598 | old_lines.old_file = source_file_name; | |
d318976c FN |
1599 | make_cleanup (source_cleanup_lines, &old_lines); |
1600 | source_line_number = 0; | |
1601 | source_file_name = file; | |
d318976c FN |
1602 | /* This will get set every time we read a line. So it won't stay "" for |
1603 | long. */ | |
1604 | error_pre_print = ""; | |
1605 | ||
17d92a02 | 1606 | { |
71fff37b | 1607 | struct gdb_exception e; |
17d92a02 AC |
1608 | struct wrapped_read_command_file_args args; |
1609 | args.stream = stream; | |
1610 | e = catch_exception (uiout, wrapped_read_command_file, &args, | |
1611 | RETURN_MASK_ERROR); | |
1612 | switch (e.reason) | |
1613 | { | |
1614 | case 0: | |
1615 | break; | |
1616 | case RETURN_ERROR: | |
1617 | /* Re-throw the error, but with the file name information | |
1618 | prepended. */ | |
109c3e39 AC |
1619 | throw_error (e.error, |
1620 | _("%s:%d: Error in sourced command file:\n%s"), | |
637537d0 | 1621 | source_file_name, source_line_number, e.message); |
17d92a02 | 1622 | default: |
e2e0b3e5 | 1623 | internal_error (__FILE__, __LINE__, _("bad reason")); |
17d92a02 AC |
1624 | } |
1625 | } | |
d318976c FN |
1626 | |
1627 | do_cleanups (old_cleanups); | |
1628 | } | |
1629 | ||
adb483fe DJ |
1630 | /* Print the definition of user command C to STREAM. Or, if C is a |
1631 | prefix command, show the definitions of all user commands under C | |
1632 | (recursively). PREFIX and NAME combined are the name of the | |
1633 | current command. */ | |
d318976c | 1634 | void |
adb483fe DJ |
1635 | show_user_1 (struct cmd_list_element *c, char *prefix, char *name, |
1636 | struct ui_file *stream) | |
d318976c | 1637 | { |
d5b5ac79 | 1638 | struct command_line *cmdlines; |
d318976c | 1639 | |
adb483fe DJ |
1640 | if (c->prefixlist != NULL) |
1641 | { | |
1642 | char *prefixname = c->prefixname; | |
1643 | for (c = *c->prefixlist; c != NULL; c = c->next) | |
1644 | if (c->class == class_user || c->prefixlist != NULL) | |
1645 | show_user_1 (c, prefixname, c->name, gdb_stdout); | |
1646 | return; | |
1647 | } | |
1648 | ||
d318976c FN |
1649 | cmdlines = c->user_commands; |
1650 | if (!cmdlines) | |
1651 | return; | |
adb483fe | 1652 | fprintf_filtered (stream, "User command \"%s%s\":\n", prefix, name); |
d318976c | 1653 | |
d318976c FN |
1654 | print_command_lines (uiout, cmdlines, 1); |
1655 | fputs_filtered ("\n", stream); | |
d318976c FN |
1656 | } |
1657 |