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 | ||
ebcd3b23 | 39 | /* Prototypes for local functions. */ |
d318976c | 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 | 67 | /* It is necessary to store a malloced copy of the command line to |
ebcd3b23 MS |
68 | ensure that the arguments are not overwritten before they are |
69 | used. */ | |
e28493f2 | 70 | char *command; |
d318976c FN |
71 | struct |
72 | { | |
73 | char *arg; | |
74 | int len; | |
75 | } | |
76 | a[MAXUSERARGS]; | |
77 | int count; | |
78 | } | |
79 | *user_args; | |
80 | ||
81 | \f | |
82 | /* Allocate, initialize a new command line structure for one of the | |
83 | control commands (if/while). */ | |
84 | ||
85 | static struct command_line * | |
86 | build_command_line (enum command_control_type type, char *args) | |
87 | { | |
88 | struct command_line *cmd; | |
89 | ||
40c03ae8 | 90 | if (args == NULL && (type == if_control || type == while_control)) |
8a3fe4f8 | 91 | error (_("if/while commands require arguments.")); |
c8c12293 | 92 | gdb_assert (args != NULL); |
d318976c FN |
93 | |
94 | cmd = (struct command_line *) xmalloc (sizeof (struct command_line)); | |
95 | cmd->next = NULL; | |
96 | cmd->control_type = type; | |
97 | ||
98 | cmd->body_count = 1; | |
99 | cmd->body_list | |
100 | = (struct command_line **) xmalloc (sizeof (struct command_line *) | |
101 | * cmd->body_count); | |
102 | memset (cmd->body_list, 0, sizeof (struct command_line *) * cmd->body_count); | |
1b36a34b | 103 | cmd->line = xstrdup (args); |
dd3526aa | 104 | |
d318976c FN |
105 | return cmd; |
106 | } | |
107 | ||
108 | /* Build and return a new command structure for the control commands | |
109 | such as "if" and "while". */ | |
110 | ||
d57a3c85 | 111 | struct command_line * |
d318976c FN |
112 | get_command_line (enum command_control_type type, char *arg) |
113 | { | |
114 | struct command_line *cmd; | |
115 | struct cleanup *old_chain = NULL; | |
116 | ||
117 | /* Allocate and build a new command line structure. */ | |
118 | cmd = build_command_line (type, arg); | |
119 | ||
120 | old_chain = make_cleanup_free_command_lines (&cmd); | |
121 | ||
122 | /* Read in the body of this command. */ | |
a7bdde9e VP |
123 | if (recurse_read_control_structure (read_next_line, cmd, 0, 0) |
124 | == invalid_control) | |
d318976c | 125 | { |
40c03ae8 | 126 | warning (_("Error reading in canned sequence of commands.")); |
d318976c FN |
127 | do_cleanups (old_chain); |
128 | return NULL; | |
129 | } | |
130 | ||
131 | discard_cleanups (old_chain); | |
132 | return cmd; | |
133 | } | |
134 | ||
135 | /* Recursively print a command (including full control structures). */ | |
8926118c | 136 | |
d318976c FN |
137 | void |
138 | print_command_lines (struct ui_out *uiout, struct command_line *cmd, | |
139 | unsigned int depth) | |
140 | { | |
141 | struct command_line *list; | |
142 | ||
143 | list = cmd; | |
144 | while (list) | |
145 | { | |
d318976c FN |
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 | ||
ebcd3b23 MS |
168 | /* loop_break to break out of a while loop, print it and |
169 | continue. */ | |
d318976c FN |
170 | if (list->control_type == break_control) |
171 | { | |
172 | ui_out_field_string (uiout, NULL, "loop_break"); | |
173 | ui_out_text (uiout, "\n"); | |
174 | list = list->next; | |
175 | continue; | |
176 | } | |
177 | ||
ebcd3b23 MS |
178 | /* A while command. Recursively print its subcommands and |
179 | continue. */ | |
a7bdde9e VP |
180 | if (list->control_type == while_control |
181 | || list->control_type == while_stepping_control) | |
d318976c | 182 | { |
ebcd3b23 MS |
183 | /* For while-stepping, the line includes the 'while-stepping' |
184 | token. See comment in process_next_line for explanation. | |
185 | Here, take care not print 'while-stepping' twice. */ | |
a7bdde9e VP |
186 | if (list->control_type == while_control) |
187 | ui_out_field_fmt (uiout, NULL, "while %s", list->line); | |
188 | else | |
189 | ui_out_field_string (uiout, NULL, list->line); | |
d318976c FN |
190 | ui_out_text (uiout, "\n"); |
191 | print_command_lines (uiout, *list->body_list, depth + 1); | |
d318976c FN |
192 | if (depth) |
193 | ui_out_spaces (uiout, 2 * depth); | |
e6ccd35f JSC |
194 | ui_out_field_string (uiout, NULL, "end"); |
195 | ui_out_text (uiout, "\n"); | |
d318976c FN |
196 | list = list->next; |
197 | continue; | |
198 | } | |
199 | ||
ebcd3b23 MS |
200 | /* An if command. Recursively print both arms before |
201 | continueing. */ | |
d318976c FN |
202 | if (list->control_type == if_control) |
203 | { | |
d318976c FN |
204 | ui_out_field_fmt (uiout, NULL, "if %s", list->line); |
205 | ui_out_text (uiout, "\n"); | |
ebcd3b23 | 206 | /* The true arm. */ |
d318976c FN |
207 | print_command_lines (uiout, list->body_list[0], depth + 1); |
208 | ||
209 | /* Show the false arm if it exists. */ | |
210 | if (list->body_count == 2) | |
211 | { | |
212 | if (depth) | |
213 | ui_out_spaces (uiout, 2 * depth); | |
214 | ui_out_field_string (uiout, NULL, "else"); | |
e6ccd35f | 215 | ui_out_text (uiout, "\n"); |
d318976c FN |
216 | print_command_lines (uiout, list->body_list[1], depth + 1); |
217 | } | |
218 | ||
d318976c FN |
219 | if (depth) |
220 | ui_out_spaces (uiout, 2 * depth); | |
e6ccd35f JSC |
221 | ui_out_field_string (uiout, NULL, "end"); |
222 | ui_out_text (uiout, "\n"); | |
d318976c FN |
223 | list = list->next; |
224 | continue; | |
225 | } | |
226 | ||
ebcd3b23 MS |
227 | /* A commands command. Print the breakpoint commands and |
228 | continue. */ | |
40c03ae8 EZ |
229 | if (list->control_type == commands_control) |
230 | { | |
231 | if (*(list->line)) | |
232 | ui_out_field_fmt (uiout, NULL, "commands %s", list->line); | |
233 | else | |
234 | ui_out_field_string (uiout, NULL, "commands"); | |
235 | ui_out_text (uiout, "\n"); | |
236 | print_command_lines (uiout, *list->body_list, depth + 1); | |
237 | if (depth) | |
238 | ui_out_spaces (uiout, 2 * depth); | |
239 | ui_out_field_string (uiout, NULL, "end"); | |
240 | ui_out_text (uiout, "\n"); | |
241 | list = list->next; | |
242 | continue; | |
243 | } | |
244 | ||
d57a3c85 TJB |
245 | if (list->control_type == python_control) |
246 | { | |
247 | ui_out_field_string (uiout, NULL, "python"); | |
248 | ui_out_text (uiout, "\n"); | |
249 | /* Don't indent python code at all. */ | |
250 | print_command_lines (uiout, *list->body_list, 0); | |
251 | if (depth) | |
252 | ui_out_spaces (uiout, 2 * depth); | |
253 | ui_out_field_string (uiout, NULL, "end"); | |
254 | ui_out_text (uiout, "\n"); | |
255 | list = list->next; | |
256 | continue; | |
257 | } | |
258 | ||
ebcd3b23 | 259 | /* Ignore illegal command type and try next. */ |
d318976c FN |
260 | list = list->next; |
261 | } /* while (list) */ | |
262 | } | |
d318976c | 263 | |
5913bcb0 AC |
264 | /* Handle pre-post hooks. */ |
265 | ||
b9362cc7 | 266 | static void |
5913bcb0 AC |
267 | clear_hook_in_cleanup (void *data) |
268 | { | |
269 | struct cmd_list_element *c = data; | |
cdb27c12 | 270 | |
ebcd3b23 | 271 | c->hook_in = 0; /* Allow hook to work again once it is complete. */ |
5913bcb0 AC |
272 | } |
273 | ||
274 | void | |
275 | execute_cmd_pre_hook (struct cmd_list_element *c) | |
276 | { | |
277 | if ((c->hook_pre) && (!c->hook_in)) | |
278 | { | |
279 | struct cleanup *cleanups = make_cleanup (clear_hook_in_cleanup, c); | |
ebcd3b23 | 280 | c->hook_in = 1; /* Prevent recursive hooking. */ |
5913bcb0 AC |
281 | execute_user_command (c->hook_pre, (char *) 0); |
282 | do_cleanups (cleanups); | |
283 | } | |
284 | } | |
285 | ||
286 | void | |
287 | execute_cmd_post_hook (struct cmd_list_element *c) | |
288 | { | |
289 | if ((c->hook_post) && (!c->hook_in)) | |
290 | { | |
291 | struct cleanup *cleanups = make_cleanup (clear_hook_in_cleanup, c); | |
cdb27c12 | 292 | |
ebcd3b23 | 293 | c->hook_in = 1; /* Prevent recursive hooking. */ |
5913bcb0 AC |
294 | execute_user_command (c->hook_post, (char *) 0); |
295 | do_cleanups (cleanups); | |
296 | } | |
297 | } | |
298 | ||
d318976c | 299 | /* Execute the command in CMD. */ |
b9362cc7 | 300 | static void |
20f01a46 DH |
301 | do_restore_user_call_depth (void * call_depth) |
302 | { | |
cdb27c12 MS |
303 | int *depth = call_depth; |
304 | ||
698ba934 DJ |
305 | (*depth)--; |
306 | if ((*depth) == 0) | |
307 | in_user_command = 0; | |
20f01a46 DH |
308 | } |
309 | ||
d318976c FN |
310 | |
311 | void | |
312 | execute_user_command (struct cmd_list_element *c, char *args) | |
313 | { | |
d5b5ac79 | 314 | struct command_line *cmdlines; |
d318976c FN |
315 | struct cleanup *old_chain; |
316 | enum command_control_type ret; | |
20f01a46 DH |
317 | static int user_call_depth = 0; |
318 | extern int max_user_call_depth; | |
d318976c FN |
319 | |
320 | old_chain = setup_user_args (args); | |
321 | ||
322 | cmdlines = c->user_commands; | |
323 | if (cmdlines == 0) | |
324 | /* Null command */ | |
325 | return; | |
326 | ||
20f01a46 | 327 | if (++user_call_depth > max_user_call_depth) |
8a3fe4f8 | 328 | error (_("Max user call depth exceeded -- command aborted.")); |
20f01a46 | 329 | |
698ba934 | 330 | make_cleanup (do_restore_user_call_depth, &user_call_depth); |
20f01a46 | 331 | |
d318976c FN |
332 | /* Set the instream to 0, indicating execution of a |
333 | user-defined function. */ | |
698ba934 | 334 | make_cleanup (do_restore_instream_cleanup, instream); |
d318976c | 335 | instream = (FILE *) 0; |
698ba934 DJ |
336 | |
337 | /* Also set the global in_user_command, so that NULL instream is | |
338 | not confused with Insight. */ | |
339 | in_user_command = 1; | |
340 | ||
8625200f | 341 | command_nest_depth++; |
d318976c FN |
342 | while (cmdlines) |
343 | { | |
344 | ret = execute_control_command (cmdlines); | |
345 | if (ret != simple_control && ret != break_control) | |
346 | { | |
40c03ae8 | 347 | warning (_("Error executing canned sequence of commands.")); |
d318976c FN |
348 | break; |
349 | } | |
350 | cmdlines = cmdlines->next; | |
351 | } | |
8625200f | 352 | command_nest_depth--; |
d318976c FN |
353 | do_cleanups (old_chain); |
354 | } | |
355 | ||
ebcd3b23 MS |
356 | /* This function is called every time GDB prints a prompt. It ensures |
357 | that errors and the like do not confuse the command tracing. */ | |
16026cd7 AS |
358 | |
359 | void | |
360 | reset_command_nest_depth (void) | |
361 | { | |
362 | command_nest_depth = 1; | |
363 | ||
364 | /* Just in case. */ | |
365 | suppress_next_print_command_trace = 0; | |
366 | } | |
367 | ||
368 | /* Print the command, prefixed with '+' to represent the call depth. | |
369 | This is slightly complicated because this function may be called | |
370 | from execute_command and execute_control_command. Unfortunately | |
371 | execute_command also prints the top level control commands. | |
372 | In these cases execute_command will call execute_control_command | |
373 | via while_command or if_command. Inner levels of 'if' and 'while' | |
374 | are dealt with directly. Therefore we can use these functions | |
375 | to determine whether the command has been printed already or not. */ | |
376 | void | |
377 | print_command_trace (const char *cmd) | |
378 | { | |
379 | int i; | |
380 | ||
381 | if (suppress_next_print_command_trace) | |
382 | { | |
383 | suppress_next_print_command_trace = 0; | |
384 | return; | |
385 | } | |
386 | ||
387 | if (!source_verbose && !trace_commands) | |
388 | return; | |
389 | ||
390 | for (i=0; i < command_nest_depth; i++) | |
391 | printf_filtered ("+"); | |
392 | ||
393 | printf_filtered ("%s\n", cmd); | |
394 | } | |
395 | ||
d318976c FN |
396 | enum command_control_type |
397 | execute_control_command (struct command_line *cmd) | |
398 | { | |
399 | struct expression *expr; | |
400 | struct command_line *current; | |
4d2acc65 | 401 | struct cleanup *old_chain = make_cleanup (null_cleanup, 0); |
f976f6d4 AC |
402 | struct value *val; |
403 | struct value *val_mark; | |
d318976c FN |
404 | int loop; |
405 | enum command_control_type ret; | |
406 | char *new_line; | |
407 | ||
4d2acc65 AC |
408 | /* Start by assuming failure, if a problem is detected, the code |
409 | below will simply "break" out of the switch. */ | |
410 | ret = invalid_control; | |
411 | ||
d318976c FN |
412 | switch (cmd->control_type) |
413 | { | |
414 | case simple_control: | |
415 | /* A simple command, execute it and return. */ | |
416 | new_line = insert_args (cmd->line); | |
417 | if (!new_line) | |
4d2acc65 AC |
418 | break; |
419 | make_cleanup (free_current_contents, &new_line); | |
d318976c FN |
420 | execute_command (new_line, 0); |
421 | ret = cmd->control_type; | |
422 | break; | |
423 | ||
424 | case continue_control: | |
16026cd7 AS |
425 | print_command_trace ("loop_continue"); |
426 | ||
427 | /* Return for "continue", and "break" so we can either | |
428 | continue the loop at the top, or break out. */ | |
429 | ret = cmd->control_type; | |
430 | break; | |
431 | ||
d318976c | 432 | case break_control: |
16026cd7 AS |
433 | print_command_trace ("loop_break"); |
434 | ||
d318976c FN |
435 | /* Return for "continue", and "break" so we can either |
436 | continue the loop at the top, or break out. */ | |
437 | ret = cmd->control_type; | |
438 | break; | |
439 | ||
440 | case while_control: | |
441 | { | |
16026cd7 | 442 | char *buffer = alloca (strlen (cmd->line) + 7); |
cdb27c12 | 443 | |
16026cd7 AS |
444 | sprintf (buffer, "while %s", cmd->line); |
445 | print_command_trace (buffer); | |
446 | ||
d318976c FN |
447 | /* Parse the loop control expression for the while statement. */ |
448 | new_line = insert_args (cmd->line); | |
449 | if (!new_line) | |
4d2acc65 AC |
450 | break; |
451 | make_cleanup (free_current_contents, &new_line); | |
d318976c FN |
452 | expr = parse_expression (new_line); |
453 | make_cleanup (free_current_contents, &expr); | |
454 | ||
455 | ret = simple_control; | |
456 | loop = 1; | |
457 | ||
458 | /* Keep iterating so long as the expression is true. */ | |
459 | while (loop == 1) | |
460 | { | |
461 | int cond_result; | |
462 | ||
463 | QUIT; | |
464 | ||
465 | /* Evaluate the expression. */ | |
466 | val_mark = value_mark (); | |
467 | val = evaluate_expression (expr); | |
468 | cond_result = value_true (val); | |
469 | value_free_to_mark (val_mark); | |
470 | ||
471 | /* If the value is false, then break out of the loop. */ | |
472 | if (!cond_result) | |
473 | break; | |
474 | ||
475 | /* Execute the body of the while statement. */ | |
476 | current = *cmd->body_list; | |
477 | while (current) | |
478 | { | |
16026cd7 | 479 | command_nest_depth++; |
d318976c | 480 | ret = execute_control_command (current); |
16026cd7 | 481 | command_nest_depth--; |
d318976c FN |
482 | |
483 | /* If we got an error, or a "break" command, then stop | |
484 | looping. */ | |
485 | if (ret == invalid_control || ret == break_control) | |
486 | { | |
487 | loop = 0; | |
488 | break; | |
489 | } | |
490 | ||
491 | /* If we got a "continue" command, then restart the loop | |
492 | at this point. */ | |
493 | if (ret == continue_control) | |
494 | break; | |
495 | ||
496 | /* Get the next statement. */ | |
497 | current = current->next; | |
498 | } | |
499 | } | |
500 | ||
501 | /* Reset RET so that we don't recurse the break all the way down. */ | |
502 | if (ret == break_control) | |
503 | ret = simple_control; | |
504 | ||
505 | break; | |
506 | } | |
507 | ||
508 | case if_control: | |
509 | { | |
16026cd7 | 510 | char *buffer = alloca (strlen (cmd->line) + 4); |
cdb27c12 | 511 | |
16026cd7 AS |
512 | sprintf (buffer, "if %s", cmd->line); |
513 | print_command_trace (buffer); | |
514 | ||
d318976c FN |
515 | new_line = insert_args (cmd->line); |
516 | if (!new_line) | |
4d2acc65 AC |
517 | break; |
518 | make_cleanup (free_current_contents, &new_line); | |
d318976c FN |
519 | /* Parse the conditional for the if statement. */ |
520 | expr = parse_expression (new_line); | |
521 | make_cleanup (free_current_contents, &expr); | |
522 | ||
523 | current = NULL; | |
524 | ret = simple_control; | |
525 | ||
526 | /* Evaluate the conditional. */ | |
527 | val_mark = value_mark (); | |
528 | val = evaluate_expression (expr); | |
529 | ||
ebcd3b23 MS |
530 | /* Choose which arm to take commands from based on the value |
531 | of the conditional expression. */ | |
d318976c FN |
532 | if (value_true (val)) |
533 | current = *cmd->body_list; | |
534 | else if (cmd->body_count == 2) | |
535 | current = *(cmd->body_list + 1); | |
536 | value_free_to_mark (val_mark); | |
537 | ||
538 | /* Execute commands in the given arm. */ | |
539 | while (current) | |
540 | { | |
16026cd7 | 541 | command_nest_depth++; |
d318976c | 542 | ret = execute_control_command (current); |
16026cd7 | 543 | command_nest_depth--; |
d318976c FN |
544 | |
545 | /* If we got an error, get out. */ | |
546 | if (ret != simple_control) | |
547 | break; | |
548 | ||
549 | /* Get the next statement in the body. */ | |
550 | current = current->next; | |
551 | } | |
552 | ||
553 | break; | |
554 | } | |
40c03ae8 EZ |
555 | case commands_control: |
556 | { | |
ebcd3b23 MS |
557 | /* Breakpoint commands list, record the commands in the |
558 | breakpoint's command list and return. */ | |
40c03ae8 EZ |
559 | new_line = insert_args (cmd->line); |
560 | if (!new_line) | |
561 | break; | |
562 | make_cleanup (free_current_contents, &new_line); | |
563 | ret = commands_from_control_command (new_line, cmd); | |
564 | break; | |
565 | } | |
d57a3c85 TJB |
566 | case python_control: |
567 | { | |
568 | eval_python_from_control_command (cmd); | |
569 | ret = simple_control; | |
570 | break; | |
571 | } | |
d318976c FN |
572 | |
573 | default: | |
40c03ae8 | 574 | warning (_("Invalid control type in canned commands structure.")); |
4d2acc65 | 575 | break; |
d318976c FN |
576 | } |
577 | ||
4d2acc65 | 578 | do_cleanups (old_chain); |
d318976c FN |
579 | |
580 | return ret; | |
581 | } | |
582 | ||
d57a3c85 | 583 | /* Like execute_control_command, but first set |
ebcd3b23 | 584 | suppress_next_print_command_trace. */ |
d57a3c85 TJB |
585 | |
586 | enum command_control_type | |
587 | execute_control_command_untraced (struct command_line *cmd) | |
588 | { | |
589 | suppress_next_print_command_trace = 1; | |
590 | return execute_control_command (cmd); | |
591 | } | |
592 | ||
593 | ||
d318976c FN |
594 | /* "while" command support. Executes a body of statements while the |
595 | loop condition is nonzero. */ | |
596 | ||
597 | void | |
598 | while_command (char *arg, int from_tty) | |
599 | { | |
600 | struct command_line *command = NULL; | |
601 | ||
602 | control_level = 1; | |
603 | command = get_command_line (while_control, arg); | |
604 | ||
605 | if (command == NULL) | |
606 | return; | |
607 | ||
d57a3c85 | 608 | execute_control_command_untraced (command); |
d318976c FN |
609 | free_command_lines (&command); |
610 | } | |
611 | ||
612 | /* "if" command support. Execute either the true or false arm depending | |
613 | on the value of the if conditional. */ | |
614 | ||
615 | void | |
616 | if_command (char *arg, int from_tty) | |
617 | { | |
618 | struct command_line *command = NULL; | |
619 | ||
620 | control_level = 1; | |
621 | command = get_command_line (if_control, arg); | |
622 | ||
623 | if (command == NULL) | |
624 | return; | |
625 | ||
d57a3c85 | 626 | execute_control_command_untraced (command); |
d318976c FN |
627 | free_command_lines (&command); |
628 | } | |
629 | ||
630 | /* Cleanup */ | |
631 | static void | |
632 | arg_cleanup (void *ignore) | |
633 | { | |
634 | struct user_args *oargs = user_args; | |
cdb27c12 | 635 | |
d318976c | 636 | if (!user_args) |
8e65ff28 | 637 | internal_error (__FILE__, __LINE__, |
e2e0b3e5 | 638 | _("arg_cleanup called with no user args.\n")); |
d318976c FN |
639 | |
640 | user_args = user_args->next; | |
e28493f2 | 641 | xfree (oargs->command); |
b8c9b27d | 642 | xfree (oargs); |
d318976c FN |
643 | } |
644 | ||
645 | /* Bind the incomming arguments for a user defined command to | |
646 | $arg0, $arg1 ... $argMAXUSERARGS. */ | |
647 | ||
648 | static struct cleanup * | |
649 | setup_user_args (char *p) | |
650 | { | |
651 | struct user_args *args; | |
652 | struct cleanup *old_chain; | |
653 | unsigned int arg_count = 0; | |
654 | ||
655 | args = (struct user_args *) xmalloc (sizeof (struct user_args)); | |
656 | memset (args, 0, sizeof (struct user_args)); | |
657 | ||
658 | args->next = user_args; | |
659 | user_args = args; | |
660 | ||
661 | old_chain = make_cleanup (arg_cleanup, 0/*ignored*/); | |
662 | ||
663 | if (p == NULL) | |
664 | return old_chain; | |
665 | ||
e28493f2 AS |
666 | user_args->command = p = xstrdup (p); |
667 | ||
d318976c FN |
668 | while (*p) |
669 | { | |
670 | char *start_arg; | |
671 | int squote = 0; | |
672 | int dquote = 0; | |
673 | int bsquote = 0; | |
674 | ||
675 | if (arg_count >= MAXUSERARGS) | |
676 | { | |
8a3fe4f8 | 677 | error (_("user defined function may only have %d arguments."), |
d318976c FN |
678 | MAXUSERARGS); |
679 | return old_chain; | |
680 | } | |
681 | ||
682 | /* Strip whitespace. */ | |
683 | while (*p == ' ' || *p == '\t') | |
684 | p++; | |
685 | ||
686 | /* P now points to an argument. */ | |
687 | start_arg = p; | |
688 | user_args->a[arg_count].arg = p; | |
689 | ||
690 | /* Get to the end of this argument. */ | |
691 | while (*p) | |
692 | { | |
693 | if (((*p == ' ' || *p == '\t')) && !squote && !dquote && !bsquote) | |
694 | break; | |
695 | else | |
696 | { | |
697 | if (bsquote) | |
698 | bsquote = 0; | |
699 | else if (*p == '\\') | |
700 | bsquote = 1; | |
701 | else if (squote) | |
702 | { | |
703 | if (*p == '\'') | |
704 | squote = 0; | |
705 | } | |
706 | else if (dquote) | |
707 | { | |
708 | if (*p == '"') | |
709 | dquote = 0; | |
710 | } | |
711 | else | |
712 | { | |
713 | if (*p == '\'') | |
714 | squote = 1; | |
715 | else if (*p == '"') | |
716 | dquote = 1; | |
717 | } | |
718 | p++; | |
719 | } | |
720 | } | |
721 | ||
722 | user_args->a[arg_count].len = p - start_arg; | |
723 | arg_count++; | |
724 | user_args->count++; | |
725 | } | |
726 | return old_chain; | |
727 | } | |
728 | ||
ebcd3b23 MS |
729 | /* Given character string P, return a point to the first argument |
730 | ($arg), or NULL if P contains no arguments. */ | |
d318976c FN |
731 | |
732 | static char * | |
733 | locate_arg (char *p) | |
734 | { | |
735 | while ((p = strchr (p, '$'))) | |
736 | { | |
c03c782f AS |
737 | if (strncmp (p, "$arg", 4) == 0 |
738 | && (isdigit (p[4]) || p[4] == 'c')) | |
d318976c FN |
739 | return p; |
740 | p++; | |
741 | } | |
742 | return NULL; | |
743 | } | |
744 | ||
745 | /* Insert the user defined arguments stored in user_arg into the $arg | |
ebcd3b23 MS |
746 | arguments found in line, with the updated copy being placed into |
747 | nline. */ | |
d318976c FN |
748 | |
749 | static char * | |
750 | insert_args (char *line) | |
751 | { | |
752 | char *p, *save_line, *new_line; | |
753 | unsigned len, i; | |
754 | ||
61d9b92f DJ |
755 | /* If we are not in a user-defined function, treat $argc, $arg0, et |
756 | cetera as normal convenience variables. */ | |
757 | if (user_args == NULL) | |
758 | return xstrdup (line); | |
759 | ||
ebcd3b23 MS |
760 | /* First we need to know how much memory to allocate for the new |
761 | line. */ | |
d318976c FN |
762 | save_line = line; |
763 | len = 0; | |
764 | while ((p = locate_arg (line))) | |
765 | { | |
766 | len += p - line; | |
767 | i = p[4] - '0'; | |
768 | ||
c03c782f AS |
769 | if (p[4] == 'c') |
770 | { | |
771 | /* $argc. Number will be <=10. */ | |
772 | len += user_args->count == 10 ? 2 : 1; | |
773 | } | |
774 | else if (i >= user_args->count) | |
d318976c | 775 | { |
8a3fe4f8 | 776 | error (_("Missing argument %d in user function."), i); |
d318976c FN |
777 | return NULL; |
778 | } | |
c03c782f AS |
779 | else |
780 | { | |
781 | len += user_args->a[i].len; | |
782 | } | |
d318976c FN |
783 | line = p + 5; |
784 | } | |
785 | ||
786 | /* Don't forget the tail. */ | |
787 | len += strlen (line); | |
788 | ||
789 | /* Allocate space for the new line and fill it in. */ | |
790 | new_line = (char *) xmalloc (len + 1); | |
791 | if (new_line == NULL) | |
792 | return NULL; | |
793 | ||
794 | /* Restore pointer to beginning of old line. */ | |
795 | line = save_line; | |
796 | ||
797 | /* Save pointer to beginning of new line. */ | |
798 | save_line = new_line; | |
799 | ||
800 | while ((p = locate_arg (line))) | |
801 | { | |
802 | int i, len; | |
803 | ||
804 | memcpy (new_line, line, p - line); | |
805 | new_line += p - line; | |
d318976c | 806 | |
c03c782f AS |
807 | if (p[4] == 'c') |
808 | { | |
809 | gdb_assert (user_args->count >= 0 && user_args->count <= 10); | |
810 | if (user_args->count == 10) | |
811 | { | |
812 | *(new_line++) = '1'; | |
813 | *(new_line++) = '0'; | |
814 | } | |
815 | else | |
816 | *(new_line++) = user_args->count + '0'; | |
817 | } | |
818 | else | |
d318976c | 819 | { |
c03c782f AS |
820 | i = p[4] - '0'; |
821 | len = user_args->a[i].len; | |
822 | if (len) | |
cdb27c12 MS |
823 | { |
824 | memcpy (new_line, user_args->a[i].arg, len); | |
825 | new_line += len; | |
826 | } | |
d318976c FN |
827 | } |
828 | line = p + 5; | |
829 | } | |
830 | /* Don't forget the tail. */ | |
831 | strcpy (new_line, line); | |
832 | ||
833 | /* Return a pointer to the beginning of the new line. */ | |
834 | return save_line; | |
835 | } | |
836 | ||
837 | \f | |
838 | /* Expand the body_list of COMMAND so that it can hold NEW_LENGTH | |
839 | code bodies. This is typically used when we encounter an "else" | |
840 | clause for an "if" command. */ | |
841 | ||
842 | static void | |
843 | realloc_body_list (struct command_line *command, int new_length) | |
844 | { | |
845 | int n; | |
846 | struct command_line **body_list; | |
847 | ||
848 | n = command->body_count; | |
849 | ||
850 | /* Nothing to do? */ | |
851 | if (new_length <= n) | |
852 | return; | |
853 | ||
854 | body_list = (struct command_line **) | |
855 | xmalloc (sizeof (struct command_line *) * new_length); | |
856 | ||
857 | memcpy (body_list, command->body_list, sizeof (struct command_line *) * n); | |
42b575e5 | 858 | memset (body_list + n, 0, sizeof (struct command_line *) * (new_length - n)); |
d318976c | 859 | |
b8c9b27d | 860 | xfree (command->body_list); |
d318976c FN |
861 | command->body_list = body_list; |
862 | command->body_count = new_length; | |
863 | } | |
864 | ||
3c1179ff VP |
865 | /* Read next line from stdout. Passed to read_command_line_1 and |
866 | recurse_read_control_structure whenever we need to read commands | |
867 | from stdout. */ | |
d318976c | 868 | |
3c1179ff | 869 | static char * |
a58d7472 | 870 | read_next_line (void) |
d318976c | 871 | { |
3c1179ff | 872 | char *prompt_ptr, control_prompt[256]; |
d318976c FN |
873 | int i = 0; |
874 | ||
875 | if (control_level >= 254) | |
8a3fe4f8 | 876 | error (_("Control nesting too deep!")); |
d318976c FN |
877 | |
878 | /* Set a prompt based on the nesting of the control commands. */ | |
9a4105ab | 879 | if (instream == stdin || (instream == 0 && deprecated_readline_hook != NULL)) |
d318976c FN |
880 | { |
881 | for (i = 0; i < control_level; i++) | |
882 | control_prompt[i] = ' '; | |
883 | control_prompt[i] = '>'; | |
884 | control_prompt[i + 1] = '\0'; | |
885 | prompt_ptr = (char *) &control_prompt[0]; | |
886 | } | |
887 | else | |
888 | prompt_ptr = NULL; | |
889 | ||
3c1179ff VP |
890 | return command_line_input (prompt_ptr, instream == stdin, "commands"); |
891 | } | |
892 | ||
ebcd3b23 MS |
893 | /* Process one input line. If the command is an "end", return such an |
894 | indication to the caller. If PARSE_COMMANDS is true, strip leading | |
895 | whitespace (trailing whitespace is always stripped) in the line, | |
896 | attempt to recognize GDB control commands, and also return an | |
897 | indication if the command is an "else" or a nop. | |
898 | ||
3c1179ff VP |
899 | Otherwise, only "end" is recognized. */ |
900 | ||
901 | static enum misc_command_type | |
a7bdde9e VP |
902 | process_next_line (char *p, struct command_line **command, int parse_commands, |
903 | void (*validator)(char *, void *), void *closure) | |
3c1179ff | 904 | { |
50cb2941 JK |
905 | char *p_end; |
906 | char *p_start; | |
3c1179ff | 907 | int not_handled = 0; |
d318976c FN |
908 | |
909 | /* Not sure what to do here. */ | |
910 | if (p == NULL) | |
911 | return end_command; | |
912 | ||
311a4e6b | 913 | /* Strip trailing whitespace. */ |
50cb2941 JK |
914 | p_end = p + strlen (p); |
915 | while (p_end > p && (p_end[-1] == ' ' || p_end[-1] == '\t')) | |
916 | p_end--; | |
d318976c | 917 | |
50cb2941 | 918 | p_start = p; |
3630a92d | 919 | /* Strip leading whitespace. */ |
50cb2941 JK |
920 | while (p_start < p_end && (*p_start == ' ' || *p_start == '\t')) |
921 | p_start++; | |
d318976c | 922 | |
ebcd3b23 | 923 | /* 'end' is always recognized, regardless of parse_commands value. |
3630a92d | 924 | We also permit whitespace before end and after. */ |
50cb2941 | 925 | if (p_end - p_start == 3 && !strncmp (p_start, "end", 3)) |
3630a92d VP |
926 | return end_command; |
927 | ||
311a4e6b | 928 | if (parse_commands) |
d318976c | 929 | { |
ebcd3b23 | 930 | /* If commands are parsed, we skip initial spaces. Otherwise, |
3630a92d VP |
931 | which is the case for Python commands and documentation |
932 | (see the 'document' command), spaces are preserved. */ | |
50cb2941 | 933 | p = p_start; |
3630a92d | 934 | |
311a4e6b | 935 | /* Blanks and comments don't really do anything, but we need to |
ebcd3b23 MS |
936 | distinguish them from else, end and other commands which can |
937 | be executed. */ | |
50cb2941 | 938 | if (p_end == p || p[0] == '#') |
311a4e6b TJB |
939 | return nop_command; |
940 | ||
941 | /* Is the else clause of an if control structure? */ | |
50cb2941 | 942 | if (p_end - p == 4 && !strncmp (p, "else", 4)) |
311a4e6b TJB |
943 | return else_command; |
944 | ||
ebcd3b23 MS |
945 | /* Check for while, if, break, continue, etc and build a new |
946 | command line structure for them. */ | |
a7bdde9e | 947 | if ((p_end - p >= 14 && !strncmp (p, "while-stepping", 14)) |
d350db38 PA |
948 | || (p_end - p >= 8 && !strncmp (p, "stepping", 8)) |
949 | || (p_end - p >= 2 && !strncmp (p, "ws", 2))) | |
a7bdde9e VP |
950 | { |
951 | /* Because validate_actionline and encode_action lookup | |
952 | command's line as command, we need the line to | |
953 | include 'while-stepping'. | |
954 | ||
955 | For 'ws' alias, the command will have 'ws', not expanded | |
ebcd3b23 | 956 | to 'while-stepping'. This is intentional -- we don't |
a7bdde9e | 957 | really want frontend to send a command list with 'ws', |
ebcd3b23 MS |
958 | and next break-info returning command line with |
959 | 'while-stepping'. This should work, but might cause the | |
960 | breakpoint to be marked as changed while it's actually | |
961 | not. */ | |
a7bdde9e VP |
962 | *command = build_command_line (while_stepping_control, p); |
963 | } | |
964 | else if (p_end - p > 5 && !strncmp (p, "while", 5)) | |
311a4e6b TJB |
965 | { |
966 | char *first_arg; | |
cdb27c12 | 967 | |
311a4e6b | 968 | first_arg = p + 5; |
50cb2941 | 969 | while (first_arg < p_end && isspace (*first_arg)) |
311a4e6b TJB |
970 | first_arg++; |
971 | *command = build_command_line (while_control, first_arg); | |
972 | } | |
50cb2941 | 973 | else if (p_end - p > 2 && !strncmp (p, "if", 2)) |
311a4e6b TJB |
974 | { |
975 | char *first_arg; | |
cdb27c12 | 976 | |
311a4e6b | 977 | first_arg = p + 2; |
50cb2941 | 978 | while (first_arg < p_end && isspace (*first_arg)) |
311a4e6b TJB |
979 | first_arg++; |
980 | *command = build_command_line (if_control, first_arg); | |
981 | } | |
50cb2941 | 982 | else if (p_end - p >= 8 && !strncmp (p, "commands", 8)) |
311a4e6b TJB |
983 | { |
984 | char *first_arg; | |
cdb27c12 | 985 | |
311a4e6b | 986 | first_arg = p + 8; |
50cb2941 | 987 | while (first_arg < p_end && isspace (*first_arg)) |
311a4e6b TJB |
988 | first_arg++; |
989 | *command = build_command_line (commands_control, first_arg); | |
990 | } | |
50cb2941 | 991 | else if (p_end - p == 6 && !strncmp (p, "python", 6)) |
311a4e6b TJB |
992 | { |
993 | /* Note that we ignore the inline "python command" form | |
994 | here. */ | |
995 | *command = build_command_line (python_control, ""); | |
996 | } | |
50cb2941 | 997 | else if (p_end - p == 10 && !strncmp (p, "loop_break", 10)) |
311a4e6b TJB |
998 | { |
999 | *command = (struct command_line *) | |
1000 | xmalloc (sizeof (struct command_line)); | |
1001 | (*command)->next = NULL; | |
1002 | (*command)->line = NULL; | |
1003 | (*command)->control_type = break_control; | |
1004 | (*command)->body_count = 0; | |
1005 | (*command)->body_list = NULL; | |
1006 | } | |
50cb2941 | 1007 | else if (p_end - p == 13 && !strncmp (p, "loop_continue", 13)) |
311a4e6b TJB |
1008 | { |
1009 | *command = (struct command_line *) | |
1010 | xmalloc (sizeof (struct command_line)); | |
1011 | (*command)->next = NULL; | |
1012 | (*command)->line = NULL; | |
1013 | (*command)->control_type = continue_control; | |
1014 | (*command)->body_count = 0; | |
1015 | (*command)->body_list = NULL; | |
1016 | } | |
1017 | else | |
1018 | not_handled = 1; | |
d318976c | 1019 | } |
311a4e6b TJB |
1020 | |
1021 | if (!parse_commands || not_handled) | |
d318976c FN |
1022 | { |
1023 | /* A normal command. */ | |
1024 | *command = (struct command_line *) | |
1025 | xmalloc (sizeof (struct command_line)); | |
1026 | (*command)->next = NULL; | |
50cb2941 | 1027 | (*command)->line = savestring (p, p_end - p); |
d318976c FN |
1028 | (*command)->control_type = simple_control; |
1029 | (*command)->body_count = 0; | |
1030 | (*command)->body_list = NULL; | |
1031 | } | |
1032 | ||
a7bdde9e VP |
1033 | if (validator) |
1034 | { | |
1035 | volatile struct gdb_exception ex; | |
cdb27c12 | 1036 | |
a7bdde9e VP |
1037 | TRY_CATCH (ex, RETURN_MASK_ALL) |
1038 | { | |
1039 | validator ((*command)->line, closure); | |
1040 | } | |
1041 | if (ex.reason < 0) | |
1042 | { | |
1043 | xfree (*command); | |
1044 | throw_exception (ex); | |
1045 | } | |
1046 | } | |
1047 | ||
d318976c FN |
1048 | /* Nothing special. */ |
1049 | return ok_command; | |
1050 | } | |
1051 | ||
ebcd3b23 MS |
1052 | /* Recursively read in the control structures and create a |
1053 | command_line structure from them. Use read_next_line_func to | |
1054 | obtain lines of the command. */ | |
d318976c FN |
1055 | |
1056 | static enum command_control_type | |
a58d7472 | 1057 | recurse_read_control_structure (char * (*read_next_line_func) (void), |
a7bdde9e VP |
1058 | struct command_line *current_cmd, |
1059 | void (*validator)(char *, void *), | |
1060 | void *closure) | |
d318976c FN |
1061 | { |
1062 | int current_body, i; | |
1063 | enum misc_command_type val; | |
1064 | enum command_control_type ret; | |
1065 | struct command_line **body_ptr, *child_tail, *next; | |
1066 | ||
1067 | child_tail = NULL; | |
1068 | current_body = 1; | |
1069 | ||
1070 | /* Sanity checks. */ | |
1071 | if (current_cmd->control_type == simple_control) | |
8a3fe4f8 | 1072 | error (_("Recursed on a simple control type.")); |
d318976c FN |
1073 | |
1074 | if (current_body > current_cmd->body_count) | |
8a3fe4f8 | 1075 | error (_("Allocated body is smaller than this command type needs.")); |
d318976c FN |
1076 | |
1077 | /* Read lines from the input stream and build control structures. */ | |
1078 | while (1) | |
1079 | { | |
1080 | dont_repeat (); | |
1081 | ||
1082 | next = NULL; | |
3c1179ff | 1083 | val = process_next_line (read_next_line_func (), &next, |
a7bdde9e VP |
1084 | current_cmd->control_type != python_control, |
1085 | validator, closure); | |
d318976c FN |
1086 | |
1087 | /* Just skip blanks and comments. */ | |
1088 | if (val == nop_command) | |
1089 | continue; | |
1090 | ||
1091 | if (val == end_command) | |
1092 | { | |
1093 | if (current_cmd->control_type == while_control | |
a7bdde9e | 1094 | || current_cmd->control_type == while_stepping_control |
40c03ae8 | 1095 | || current_cmd->control_type == if_control |
d57a3c85 | 1096 | || current_cmd->control_type == python_control |
40c03ae8 | 1097 | || current_cmd->control_type == commands_control) |
d318976c | 1098 | { |
40c03ae8 | 1099 | /* Success reading an entire canned sequence of commands. */ |
d318976c FN |
1100 | ret = simple_control; |
1101 | break; | |
1102 | } | |
1103 | else | |
1104 | { | |
1105 | ret = invalid_control; | |
1106 | break; | |
1107 | } | |
1108 | } | |
1109 | ||
1110 | /* Not the end of a control structure. */ | |
1111 | if (val == else_command) | |
1112 | { | |
1113 | if (current_cmd->control_type == if_control | |
1114 | && current_body == 1) | |
1115 | { | |
1116 | realloc_body_list (current_cmd, 2); | |
1117 | current_body = 2; | |
1118 | child_tail = NULL; | |
1119 | continue; | |
1120 | } | |
1121 | else | |
1122 | { | |
1123 | ret = invalid_control; | |
1124 | break; | |
1125 | } | |
1126 | } | |
1127 | ||
1128 | if (child_tail) | |
1129 | { | |
1130 | child_tail->next = next; | |
1131 | } | |
1132 | else | |
1133 | { | |
1134 | body_ptr = current_cmd->body_list; | |
1135 | for (i = 1; i < current_body; i++) | |
1136 | body_ptr++; | |
1137 | ||
1138 | *body_ptr = next; | |
1139 | ||
1140 | } | |
1141 | ||
1142 | child_tail = next; | |
1143 | ||
1144 | /* If the latest line is another control structure, then recurse | |
1145 | on it. */ | |
1146 | if (next->control_type == while_control | |
a7bdde9e | 1147 | || next->control_type == while_stepping_control |
40c03ae8 | 1148 | || next->control_type == if_control |
d57a3c85 | 1149 | || next->control_type == python_control |
40c03ae8 | 1150 | || next->control_type == commands_control) |
d318976c FN |
1151 | { |
1152 | control_level++; | |
a7bdde9e VP |
1153 | ret = recurse_read_control_structure (read_next_line_func, next, |
1154 | validator, closure); | |
d318976c FN |
1155 | control_level--; |
1156 | ||
1157 | if (ret != simple_control) | |
1158 | break; | |
1159 | } | |
1160 | } | |
1161 | ||
1162 | dont_repeat (); | |
1163 | ||
1164 | return ret; | |
1165 | } | |
1166 | ||
1167 | /* Read lines from the input stream and accumulate them in a chain of | |
1168 | struct command_line's, which is then returned. For input from a | |
1169 | terminal, the special command "end" is used to mark the end of the | |
311a4e6b TJB |
1170 | input, and is not included in the returned chain of commands. |
1171 | ||
1172 | If PARSE_COMMANDS is true, strip leading whitespace (trailing whitespace | |
1173 | is always stripped) in the line and attempt to recognize GDB control | |
1174 | commands. Otherwise, only "end" is recognized. */ | |
d318976c FN |
1175 | |
1176 | #define END_MESSAGE "End with a line saying just \"end\"." | |
1177 | ||
1178 | struct command_line * | |
a7bdde9e VP |
1179 | read_command_lines (char *prompt_arg, int from_tty, int parse_commands, |
1180 | void (*validator)(char *, void *), void *closure) | |
d318976c | 1181 | { |
3c1179ff | 1182 | struct command_line *head; |
698ba934 DJ |
1183 | |
1184 | if (from_tty && input_from_terminal_p ()) | |
d318976c | 1185 | { |
698ba934 DJ |
1186 | if (deprecated_readline_begin_hook) |
1187 | { | |
ebcd3b23 | 1188 | /* Note - intentional to merge messages with no newline. */ |
698ba934 DJ |
1189 | (*deprecated_readline_begin_hook) ("%s %s\n", prompt_arg, END_MESSAGE); |
1190 | } | |
1191 | else | |
1192 | { | |
1193 | printf_unfiltered ("%s\n%s\n", prompt_arg, END_MESSAGE); | |
1194 | gdb_flush (gdb_stdout); | |
1195 | } | |
d318976c FN |
1196 | } |
1197 | ||
a7bdde9e VP |
1198 | head = read_command_lines_1 (read_next_line, parse_commands, |
1199 | validator, closure); | |
3c1179ff VP |
1200 | |
1201 | if (deprecated_readline_end_hook && from_tty && input_from_terminal_p ()) | |
1202 | { | |
1203 | (*deprecated_readline_end_hook) (); | |
1204 | } | |
1205 | return (head); | |
1206 | } | |
1207 | ||
1208 | /* Act the same way as read_command_lines, except that each new line is | |
1209 | obtained using READ_NEXT_LINE_FUNC. */ | |
1210 | ||
1211 | struct command_line * | |
a7bdde9e VP |
1212 | read_command_lines_1 (char * (*read_next_line_func) (void), int parse_commands, |
1213 | void (*validator)(char *, void *), void *closure) | |
3c1179ff VP |
1214 | { |
1215 | struct command_line *head, *tail, *next; | |
1216 | struct cleanup *old_chain; | |
1217 | enum command_control_type ret; | |
1218 | enum misc_command_type val; | |
1219 | ||
1220 | control_level = 0; | |
d318976c FN |
1221 | head = tail = NULL; |
1222 | old_chain = NULL; | |
1223 | ||
1224 | while (1) | |
1225 | { | |
f429d7d0 | 1226 | dont_repeat (); |
a7bdde9e VP |
1227 | val = process_next_line (read_next_line_func (), &next, parse_commands, |
1228 | validator, closure); | |
d318976c FN |
1229 | |
1230 | /* Ignore blank lines or comments. */ | |
1231 | if (val == nop_command) | |
1232 | continue; | |
1233 | ||
1234 | if (val == end_command) | |
1235 | { | |
1236 | ret = simple_control; | |
1237 | break; | |
1238 | } | |
1239 | ||
1240 | if (val != ok_command) | |
1241 | { | |
1242 | ret = invalid_control; | |
1243 | break; | |
1244 | } | |
1245 | ||
1246 | if (next->control_type == while_control | |
40c03ae8 | 1247 | || next->control_type == if_control |
d57a3c85 | 1248 | || next->control_type == python_control |
a7bdde9e VP |
1249 | || next->control_type == commands_control |
1250 | || next->control_type == while_stepping_control) | |
d318976c FN |
1251 | { |
1252 | control_level++; | |
a7bdde9e VP |
1253 | ret = recurse_read_control_structure (read_next_line_func, next, |
1254 | validator, closure); | |
d318976c FN |
1255 | control_level--; |
1256 | ||
1257 | if (ret == invalid_control) | |
1258 | break; | |
1259 | } | |
1260 | ||
1261 | if (tail) | |
1262 | { | |
1263 | tail->next = next; | |
1264 | } | |
1265 | else | |
1266 | { | |
1267 | head = next; | |
1268 | old_chain = make_cleanup_free_command_lines (&head); | |
1269 | } | |
1270 | tail = next; | |
1271 | } | |
1272 | ||
1273 | dont_repeat (); | |
1274 | ||
1275 | if (head) | |
1276 | { | |
1277 | if (ret != invalid_control) | |
1278 | { | |
1279 | discard_cleanups (old_chain); | |
1280 | } | |
1281 | else | |
1282 | do_cleanups (old_chain); | |
1283 | } | |
1284 | ||
3c1179ff | 1285 | return head; |
d318976c FN |
1286 | } |
1287 | ||
1288 | /* Free a chain of struct command_line's. */ | |
1289 | ||
1290 | void | |
1291 | free_command_lines (struct command_line **lptr) | |
1292 | { | |
d5b5ac79 AC |
1293 | struct command_line *l = *lptr; |
1294 | struct command_line *next; | |
d318976c FN |
1295 | struct command_line **blist; |
1296 | int i; | |
1297 | ||
1298 | while (l) | |
1299 | { | |
1300 | if (l->body_count > 0) | |
1301 | { | |
1302 | blist = l->body_list; | |
1303 | for (i = 0; i < l->body_count; i++, blist++) | |
1304 | free_command_lines (blist); | |
1305 | } | |
1306 | next = l->next; | |
b8c9b27d KB |
1307 | xfree (l->line); |
1308 | xfree (l); | |
d318976c FN |
1309 | l = next; |
1310 | } | |
0d70f41b | 1311 | *lptr = NULL; |
d318976c FN |
1312 | } |
1313 | ||
1314 | static void | |
1315 | do_free_command_lines_cleanup (void *arg) | |
1316 | { | |
1317 | free_command_lines (arg); | |
1318 | } | |
1319 | ||
6c50ab1c | 1320 | struct cleanup * |
d318976c FN |
1321 | make_cleanup_free_command_lines (struct command_line **arg) |
1322 | { | |
1323 | return make_cleanup (do_free_command_lines_cleanup, arg); | |
1324 | } | |
c2b8ed2c MS |
1325 | |
1326 | struct command_line * | |
1327 | copy_command_lines (struct command_line *cmds) | |
1328 | { | |
1329 | struct command_line *result = NULL; | |
1330 | ||
1331 | if (cmds) | |
1332 | { | |
1333 | result = (struct command_line *) xmalloc (sizeof (struct command_line)); | |
1334 | ||
1335 | result->next = copy_command_lines (cmds->next); | |
1336 | result->line = xstrdup (cmds->line); | |
1337 | result->control_type = cmds->control_type; | |
1338 | result->body_count = cmds->body_count; | |
1339 | if (cmds->body_count > 0) | |
1340 | { | |
1341 | int i; | |
1342 | ||
1343 | result->body_list = (struct command_line **) | |
1344 | xmalloc (sizeof (struct command_line *) * cmds->body_count); | |
1345 | ||
1346 | for (i = 0; i < cmds->body_count; i++) | |
1347 | result->body_list[i] = copy_command_lines (cmds->body_list[i]); | |
1348 | } | |
1349 | else | |
1350 | result->body_list = NULL; | |
1351 | } | |
1352 | ||
1353 | return result; | |
1354 | } | |
d318976c | 1355 | \f |
adb483fe DJ |
1356 | /* Validate that *COMNAME is a valid name for a command. Return the |
1357 | containing command list, in case it starts with a prefix command. | |
1358 | The prefix must already exist. *COMNAME is advanced to point after | |
1359 | any prefix, and a NUL character overwrites the space after the | |
1360 | prefix. */ | |
1361 | ||
1362 | static struct cmd_list_element ** | |
1363 | validate_comname (char **comname) | |
d318976c | 1364 | { |
adb483fe DJ |
1365 | struct cmd_list_element **list = &cmdlist; |
1366 | char *p, *last_word; | |
d318976c | 1367 | |
adb483fe | 1368 | if (*comname == 0) |
e2e0b3e5 | 1369 | error_no_arg (_("name of command to define")); |
d318976c | 1370 | |
adb483fe DJ |
1371 | /* Find the last word of the argument. */ |
1372 | p = *comname + strlen (*comname); | |
1373 | while (p > *comname && isspace (p[-1])) | |
1374 | p--; | |
1375 | while (p > *comname && !isspace (p[-1])) | |
1376 | p--; | |
1377 | last_word = p; | |
1378 | ||
1379 | /* Find the corresponding command list. */ | |
1380 | if (last_word != *comname) | |
1381 | { | |
1382 | struct cmd_list_element *c; | |
1383 | char saved_char, *tem = *comname; | |
1384 | ||
1385 | /* Separate the prefix and the command. */ | |
1386 | saved_char = last_word[-1]; | |
1387 | last_word[-1] = '\0'; | |
1388 | ||
1389 | c = lookup_cmd (&tem, cmdlist, "", 0, 1); | |
1390 | if (c->prefixlist == NULL) | |
1391 | error (_("\"%s\" is not a prefix command."), *comname); | |
1392 | ||
1393 | list = c->prefixlist; | |
1394 | last_word[-1] = saved_char; | |
1395 | *comname = last_word; | |
1396 | } | |
1397 | ||
1398 | p = *comname; | |
d318976c FN |
1399 | while (*p) |
1400 | { | |
1401 | if (!isalnum (*p) && *p != '-' && *p != '_') | |
8a3fe4f8 | 1402 | error (_("Junk in argument list: \"%s\""), p); |
d318976c FN |
1403 | p++; |
1404 | } | |
adb483fe DJ |
1405 | |
1406 | return list; | |
d318976c FN |
1407 | } |
1408 | ||
1409 | /* This is just a placeholder in the command data structures. */ | |
1410 | static void | |
1411 | user_defined_command (char *ignore, int from_tty) | |
1412 | { | |
1413 | } | |
1414 | ||
1415 | void | |
1416 | define_command (char *comname, int from_tty) | |
1417 | { | |
1418 | #define MAX_TMPBUF 128 | |
1419 | enum cmd_hook_type | |
1420 | { | |
1421 | CMD_NO_HOOK = 0, | |
1422 | CMD_PRE_HOOK, | |
1423 | CMD_POST_HOOK | |
1424 | }; | |
d5b5ac79 | 1425 | struct command_line *cmds; |
d36fc00b MS |
1426 | struct cmd_list_element *c, *newc, *hookc = 0, **list; |
1427 | char *tem, *comfull; | |
d318976c FN |
1428 | char tmpbuf[MAX_TMPBUF]; |
1429 | int hook_type = CMD_NO_HOOK; | |
1430 | int hook_name_size = 0; | |
1431 | ||
1432 | #define HOOK_STRING "hook-" | |
1433 | #define HOOK_LEN 5 | |
1434 | #define HOOK_POST_STRING "hookpost-" | |
1435 | #define HOOK_POST_LEN 9 | |
1436 | ||
adb483fe DJ |
1437 | comfull = comname; |
1438 | list = validate_comname (&comname); | |
d318976c FN |
1439 | |
1440 | /* Look it up, and verify that we got an exact match. */ | |
adb483fe DJ |
1441 | tem = comname; |
1442 | c = lookup_cmd (&tem, *list, "", -1, 1); | |
5cb316ef | 1443 | if (c && strcmp (comname, c->name) != 0) |
d318976c FN |
1444 | c = 0; |
1445 | ||
1446 | if (c) | |
1447 | { | |
ab4e3d93 | 1448 | int q; |
cdb27c12 | 1449 | |
d318976c | 1450 | if (c->class == class_user || c->class == class_alias) |
e2e0b3e5 | 1451 | q = query (_("Redefine command \"%s\"? "), c->name); |
d318976c | 1452 | else |
e2e0b3e5 | 1453 | q = query (_("Really redefine built-in command \"%s\"? "), c->name); |
ab4e3d93 | 1454 | if (!q) |
8a3fe4f8 | 1455 | error (_("Command \"%s\" not redefined."), c->name); |
d318976c FN |
1456 | } |
1457 | ||
1458 | /* If this new command is a hook, then mark the command which it | |
1459 | is hooking. Note that we allow hooking `help' commands, so that | |
1460 | we can hook the `stop' pseudo-command. */ | |
1461 | ||
1462 | if (!strncmp (comname, HOOK_STRING, HOOK_LEN)) | |
1463 | { | |
1464 | hook_type = CMD_PRE_HOOK; | |
1465 | hook_name_size = HOOK_LEN; | |
1466 | } | |
1467 | else if (!strncmp (comname, HOOK_POST_STRING, HOOK_POST_LEN)) | |
1468 | { | |
1469 | hook_type = CMD_POST_HOOK; | |
1470 | hook_name_size = HOOK_POST_LEN; | |
1471 | } | |
1472 | ||
1473 | if (hook_type != CMD_NO_HOOK) | |
1474 | { | |
1475 | /* Look up cmd it hooks, and verify that we got an exact match. */ | |
1476 | tem = comname + hook_name_size; | |
adb483fe | 1477 | hookc = lookup_cmd (&tem, *list, "", -1, 0); |
5cb316ef | 1478 | if (hookc && strcmp (comname + hook_name_size, hookc->name) != 0) |
d318976c FN |
1479 | hookc = 0; |
1480 | if (!hookc) | |
1481 | { | |
8a3fe4f8 | 1482 | warning (_("Your new `%s' command does not hook any existing command."), |
adb483fe | 1483 | comfull); |
9e2f0ad4 | 1484 | if (!query (_("Proceed? "))) |
8a3fe4f8 | 1485 | error (_("Not confirmed.")); |
d318976c FN |
1486 | } |
1487 | } | |
1488 | ||
1b36a34b | 1489 | comname = xstrdup (comname); |
d318976c FN |
1490 | |
1491 | /* If the rest of the commands will be case insensitive, this one | |
ebcd3b23 | 1492 | should behave in the same manner. */ |
d318976c FN |
1493 | for (tem = comname; *tem; tem++) |
1494 | if (isupper (*tem)) | |
1495 | *tem = tolower (*tem); | |
1496 | ||
adb483fe | 1497 | sprintf (tmpbuf, "Type commands for definition of \"%s\".", comfull); |
a7bdde9e | 1498 | cmds = read_command_lines (tmpbuf, from_tty, 1, 0, 0); |
d318976c FN |
1499 | |
1500 | if (c && c->class == class_user) | |
1501 | free_command_lines (&c->user_commands); | |
1502 | ||
1503 | newc = add_cmd (comname, class_user, user_defined_command, | |
1504 | (c && c->class == class_user) | |
1b36a34b | 1505 | ? c->doc : xstrdup ("User-defined."), list); |
d318976c FN |
1506 | newc->user_commands = cmds; |
1507 | ||
1508 | /* If this new command is a hook, then mark both commands as being | |
1509 | tied. */ | |
1510 | if (hookc) | |
1511 | { | |
1512 | switch (hook_type) | |
1513 | { | |
1514 | case CMD_PRE_HOOK: | |
1515 | hookc->hook_pre = newc; /* Target gets hooked. */ | |
ebcd3b23 | 1516 | newc->hookee_pre = hookc; /* We are marked as hooking target cmd. */ |
d318976c FN |
1517 | break; |
1518 | case CMD_POST_HOOK: | |
f48ff60a | 1519 | hookc->hook_post = newc; /* Target gets hooked. */ |
ebcd3b23 | 1520 | newc->hookee_post = hookc; /* We are marked as hooking target cmd. */ |
d318976c FN |
1521 | break; |
1522 | default: | |
ebcd3b23 | 1523 | /* Should never come here as hookc would be 0. */ |
e2e0b3e5 | 1524 | internal_error (__FILE__, __LINE__, _("bad switch")); |
d318976c FN |
1525 | } |
1526 | } | |
1527 | } | |
1528 | ||
1529 | void | |
1530 | document_command (char *comname, int from_tty) | |
1531 | { | |
1532 | struct command_line *doclines; | |
adb483fe DJ |
1533 | struct cmd_list_element *c, **list; |
1534 | char *tem, *comfull; | |
d318976c FN |
1535 | char tmpbuf[128]; |
1536 | ||
adb483fe DJ |
1537 | comfull = comname; |
1538 | list = validate_comname (&comname); | |
d318976c | 1539 | |
adb483fe DJ |
1540 | tem = comname; |
1541 | c = lookup_cmd (&tem, *list, "", 0, 1); | |
d318976c FN |
1542 | |
1543 | if (c->class != class_user) | |
adb483fe | 1544 | error (_("Command \"%s\" is built-in."), comfull); |
d318976c | 1545 | |
adb483fe | 1546 | sprintf (tmpbuf, "Type documentation for \"%s\".", comfull); |
a7bdde9e | 1547 | doclines = read_command_lines (tmpbuf, from_tty, 0, 0, 0); |
d318976c FN |
1548 | |
1549 | if (c->doc) | |
b8c9b27d | 1550 | xfree (c->doc); |
d318976c FN |
1551 | |
1552 | { | |
d5b5ac79 AC |
1553 | struct command_line *cl1; |
1554 | int len = 0; | |
d318976c FN |
1555 | |
1556 | for (cl1 = doclines; cl1; cl1 = cl1->next) | |
1557 | len += strlen (cl1->line) + 1; | |
1558 | ||
1559 | c->doc = (char *) xmalloc (len + 1); | |
1560 | *c->doc = 0; | |
1561 | ||
1562 | for (cl1 = doclines; cl1; cl1 = cl1->next) | |
1563 | { | |
1564 | strcat (c->doc, cl1->line); | |
1565 | if (cl1->next) | |
1566 | strcat (c->doc, "\n"); | |
1567 | } | |
1568 | } | |
1569 | ||
1570 | free_command_lines (&doclines); | |
1571 | } | |
1572 | \f | |
1573 | struct source_cleanup_lines_args | |
1574 | { | |
1575 | int old_line; | |
05159abe | 1576 | const char *old_file; |
d318976c FN |
1577 | }; |
1578 | ||
1579 | static void | |
4efb68b1 | 1580 | source_cleanup_lines (void *args) |
d318976c FN |
1581 | { |
1582 | struct source_cleanup_lines_args *p = | |
cdb27c12 MS |
1583 | (struct source_cleanup_lines_args *) args; |
1584 | ||
d318976c FN |
1585 | source_line_number = p->old_line; |
1586 | source_file_name = p->old_file; | |
d318976c FN |
1587 | } |
1588 | ||
17d92a02 AC |
1589 | struct wrapped_read_command_file_args |
1590 | { | |
1591 | FILE *stream; | |
1592 | }; | |
1593 | ||
1594 | static void | |
1595 | wrapped_read_command_file (struct ui_out *uiout, void *data) | |
1596 | { | |
1597 | struct wrapped_read_command_file_args *args = data; | |
cdb27c12 | 1598 | |
17d92a02 AC |
1599 | read_command_file (args->stream); |
1600 | } | |
1601 | ||
ebcd3b23 | 1602 | /* Used to implement source_command. */ |
d318976c FN |
1603 | |
1604 | void | |
05159abe | 1605 | script_from_file (FILE *stream, const char *file) |
d318976c FN |
1606 | { |
1607 | struct cleanup *old_cleanups; | |
1608 | struct source_cleanup_lines_args old_lines; | |
d318976c FN |
1609 | |
1610 | if (stream == NULL) | |
e2e0b3e5 | 1611 | internal_error (__FILE__, __LINE__, _("called with NULL file pointer!")); |
d318976c | 1612 | |
7c8a8b04 | 1613 | old_cleanups = make_cleanup_fclose (stream); |
d318976c FN |
1614 | |
1615 | old_lines.old_line = source_line_number; | |
1616 | old_lines.old_file = source_file_name; | |
d318976c FN |
1617 | make_cleanup (source_cleanup_lines, &old_lines); |
1618 | source_line_number = 0; | |
1619 | source_file_name = file; | |
ebcd3b23 MS |
1620 | /* This will get set every time we read a line. So it won't stay "" |
1621 | for long. */ | |
d318976c FN |
1622 | error_pre_print = ""; |
1623 | ||
17d92a02 | 1624 | { |
71fff37b | 1625 | struct gdb_exception e; |
17d92a02 | 1626 | struct wrapped_read_command_file_args args; |
cdb27c12 | 1627 | |
17d92a02 AC |
1628 | args.stream = stream; |
1629 | e = catch_exception (uiout, wrapped_read_command_file, &args, | |
1630 | RETURN_MASK_ERROR); | |
1631 | switch (e.reason) | |
1632 | { | |
1633 | case 0: | |
1634 | break; | |
1635 | case RETURN_ERROR: | |
1636 | /* Re-throw the error, but with the file name information | |
1637 | prepended. */ | |
109c3e39 AC |
1638 | throw_error (e.error, |
1639 | _("%s:%d: Error in sourced command file:\n%s"), | |
637537d0 | 1640 | source_file_name, source_line_number, e.message); |
17d92a02 | 1641 | default: |
e2e0b3e5 | 1642 | internal_error (__FILE__, __LINE__, _("bad reason")); |
17d92a02 AC |
1643 | } |
1644 | } | |
d318976c FN |
1645 | |
1646 | do_cleanups (old_cleanups); | |
1647 | } | |
1648 | ||
adb483fe DJ |
1649 | /* Print the definition of user command C to STREAM. Or, if C is a |
1650 | prefix command, show the definitions of all user commands under C | |
1651 | (recursively). PREFIX and NAME combined are the name of the | |
1652 | current command. */ | |
d318976c | 1653 | void |
adb483fe DJ |
1654 | show_user_1 (struct cmd_list_element *c, char *prefix, char *name, |
1655 | struct ui_file *stream) | |
d318976c | 1656 | { |
d5b5ac79 | 1657 | struct command_line *cmdlines; |
d318976c | 1658 | |
adb483fe DJ |
1659 | if (c->prefixlist != NULL) |
1660 | { | |
1661 | char *prefixname = c->prefixname; | |
cdb27c12 | 1662 | |
adb483fe DJ |
1663 | for (c = *c->prefixlist; c != NULL; c = c->next) |
1664 | if (c->class == class_user || c->prefixlist != NULL) | |
1665 | show_user_1 (c, prefixname, c->name, gdb_stdout); | |
1666 | return; | |
1667 | } | |
1668 | ||
d318976c FN |
1669 | cmdlines = c->user_commands; |
1670 | if (!cmdlines) | |
1671 | return; | |
adb483fe | 1672 | fprintf_filtered (stream, "User command \"%s%s\":\n", prefix, name); |
d318976c | 1673 | |
d318976c FN |
1674 | print_command_lines (uiout, cmdlines, 1); |
1675 | fputs_filtered ("\n", stream); | |
d318976c FN |
1676 | } |
1677 |