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d318976c | 1 | /* GDB CLI command scripting. |
8926118c | 2 | |
e2882c85 | 3 | Copyright (C) 1986-2018 Free Software Foundation, Inc. |
d318976c FN |
4 | |
5 | This file is part of GDB. | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 9 | the Free Software Foundation; either version 3 of the License, or |
d318976c FN |
10 | (at your option) any later version. |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
a9762ec7 | 18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
d318976c FN |
19 | |
20 | #include "defs.h" | |
21 | #include "value.h" | |
22 | #include "language.h" /* For value_true */ | |
23 | #include <ctype.h> | |
24 | ||
d318976c | 25 | #include "ui-out.h" |
d318976c | 26 | #include "top.h" |
40c03ae8 | 27 | #include "breakpoint.h" |
d318976c FN |
28 | #include "cli/cli-cmds.h" |
29 | #include "cli/cli-decode.h" | |
30 | #include "cli/cli-script.h" | |
31 | ||
6dddc817 | 32 | #include "extension.h" |
b4a14fd0 | 33 | #include "interps.h" |
bb2ec1b3 | 34 | #include "compile/compile.h" |
d57a3c85 | 35 | |
df3ee9ca PA |
36 | #include <vector> |
37 | ||
ebcd3b23 | 38 | /* Prototypes for local functions. */ |
d318976c | 39 | |
d318976c | 40 | static enum command_control_type |
a58d7472 | 41 | recurse_read_control_structure (char * (*read_next_line_func) (void), |
a7bdde9e VP |
42 | struct command_line *current_cmd, |
43 | void (*validator)(char *, void *), | |
44 | void *closure); | |
d318976c | 45 | |
a58d7472 | 46 | static char *read_next_line (void); |
3c1179ff | 47 | |
16026cd7 | 48 | /* Level of control structure when reading. */ |
d318976c FN |
49 | static int control_level; |
50 | ||
16026cd7 AS |
51 | /* Level of control structure when executing. */ |
52 | static int command_nest_depth = 1; | |
53 | ||
54 | /* This is to prevent certain commands being printed twice. */ | |
55 | static int suppress_next_print_command_trace = 0; | |
56 | ||
df3ee9ca PA |
57 | /* A non-owning slice of a string. */ |
58 | ||
59 | struct string_view | |
60 | { | |
61 | string_view (const char *str_, size_t len_) | |
62 | : str (str_), len (len_) | |
63 | {} | |
64 | ||
65 | const char *str; | |
66 | size_t len; | |
67 | }; | |
68 | ||
d318976c | 69 | /* Structure for arguments to user defined functions. */ |
df3ee9ca PA |
70 | |
71 | class user_args | |
72 | { | |
73 | public: | |
74 | /* Save the command line and store the locations of arguments passed | |
75 | to the user defined function. */ | |
76 | explicit user_args (const char *line); | |
77 | ||
78 | /* Insert the stored user defined arguments into the $arg arguments | |
79 | found in LINE. */ | |
80 | std::string insert_args (const char *line) const; | |
81 | ||
82 | private: | |
83 | /* Disable copy/assignment. (Since the elements of A point inside | |
84 | COMMAND, copying would need to reconstruct the A vector in the | |
85 | new copy.) */ | |
86 | user_args (const user_args &) =delete; | |
87 | user_args &operator= (const user_args &) =delete; | |
88 | ||
89 | /* It is necessary to store a copy of the command line to ensure | |
90 | that the arguments are not overwritten before they are used. */ | |
91 | std::string m_command_line; | |
92 | ||
93 | /* The arguments. Each element points inside M_COMMAND_LINE. */ | |
94 | std::vector<string_view> m_args; | |
95 | }; | |
96 | ||
97 | /* The stack of arguments passed to user defined functions. We need a | |
98 | stack because user-defined functions can call other user-defined | |
99 | functions. */ | |
100 | static std::vector<std::unique_ptr<user_args>> user_args_stack; | |
101 | ||
102 | /* An RAII-base class used to push/pop args on the user args | |
103 | stack. */ | |
104 | struct scoped_user_args_level | |
105 | { | |
106 | /* Parse the command line and push the arguments in the user args | |
107 | stack. */ | |
108 | explicit scoped_user_args_level (const char *line) | |
d318976c | 109 | { |
df3ee9ca | 110 | user_args_stack.emplace_back (new user_args (line)); |
d318976c | 111 | } |
df3ee9ca PA |
112 | |
113 | /* Pop the current user arguments from the stack. */ | |
114 | ~scoped_user_args_level () | |
115 | { | |
116 | user_args_stack.pop_back (); | |
117 | } | |
118 | }; | |
d318976c FN |
119 | |
120 | \f | |
1e9c71b8 DE |
121 | /* Return non-zero if TYPE is a multi-line command (i.e., is terminated |
122 | by "end"). */ | |
123 | ||
124 | static int | |
125 | multi_line_command_p (enum command_control_type type) | |
126 | { | |
127 | switch (type) | |
128 | { | |
129 | case if_control: | |
130 | case while_control: | |
131 | case while_stepping_control: | |
132 | case commands_control: | |
bb2ec1b3 | 133 | case compile_control: |
1e9c71b8 | 134 | case python_control: |
ed3ef339 | 135 | case guile_control: |
1e9c71b8 DE |
136 | return 1; |
137 | default: | |
138 | return 0; | |
139 | } | |
140 | } | |
141 | ||
d318976c FN |
142 | /* Allocate, initialize a new command line structure for one of the |
143 | control commands (if/while). */ | |
144 | ||
145 | static struct command_line * | |
604c4576 | 146 | build_command_line (enum command_control_type type, const char *args) |
d318976c FN |
147 | { |
148 | struct command_line *cmd; | |
149 | ||
80a65e9b SM |
150 | if ((args == NULL || *args == '\0') |
151 | && (type == if_control || type == while_control)) | |
8a3fe4f8 | 152 | error (_("if/while commands require arguments.")); |
c8c12293 | 153 | gdb_assert (args != NULL); |
d318976c | 154 | |
8d749320 | 155 | cmd = XNEW (struct command_line); |
d318976c FN |
156 | cmd->next = NULL; |
157 | cmd->control_type = type; | |
158 | ||
159 | cmd->body_count = 1; | |
8d749320 | 160 | cmd->body_list = XCNEWVEC (struct command_line *, cmd->body_count); |
1b36a34b | 161 | cmd->line = xstrdup (args); |
dd3526aa | 162 | |
d318976c FN |
163 | return cmd; |
164 | } | |
165 | ||
166 | /* Build and return a new command structure for the control commands | |
167 | such as "if" and "while". */ | |
168 | ||
93921405 | 169 | command_line_up |
a121b7c1 | 170 | get_command_line (enum command_control_type type, const char *arg) |
d318976c | 171 | { |
d318976c | 172 | /* Allocate and build a new command line structure. */ |
93921405 | 173 | command_line_up cmd (build_command_line (type, arg)); |
d318976c FN |
174 | |
175 | /* Read in the body of this command. */ | |
93921405 | 176 | if (recurse_read_control_structure (read_next_line, cmd.get (), 0, 0) |
a7bdde9e | 177 | == invalid_control) |
d318976c | 178 | { |
40c03ae8 | 179 | warning (_("Error reading in canned sequence of commands.")); |
d318976c FN |
180 | return NULL; |
181 | } | |
182 | ||
d318976c FN |
183 | return cmd; |
184 | } | |
185 | ||
186 | /* Recursively print a command (including full control structures). */ | |
8926118c | 187 | |
d318976c FN |
188 | void |
189 | print_command_lines (struct ui_out *uiout, struct command_line *cmd, | |
190 | unsigned int depth) | |
191 | { | |
192 | struct command_line *list; | |
193 | ||
194 | list = cmd; | |
195 | while (list) | |
196 | { | |
d318976c | 197 | if (depth) |
112e8700 | 198 | uiout->spaces (2 * depth); |
d318976c FN |
199 | |
200 | /* A simple command, print it and continue. */ | |
201 | if (list->control_type == simple_control) | |
202 | { | |
112e8700 SM |
203 | uiout->field_string (NULL, list->line); |
204 | uiout->text ("\n"); | |
d318976c FN |
205 | list = list->next; |
206 | continue; | |
207 | } | |
208 | ||
209 | /* loop_continue to jump to the start of a while loop, print it | |
210 | and continue. */ | |
211 | if (list->control_type == continue_control) | |
212 | { | |
112e8700 SM |
213 | uiout->field_string (NULL, "loop_continue"); |
214 | uiout->text ("\n"); | |
d318976c FN |
215 | list = list->next; |
216 | continue; | |
217 | } | |
218 | ||
ebcd3b23 MS |
219 | /* loop_break to break out of a while loop, print it and |
220 | continue. */ | |
d318976c FN |
221 | if (list->control_type == break_control) |
222 | { | |
112e8700 SM |
223 | uiout->field_string (NULL, "loop_break"); |
224 | uiout->text ("\n"); | |
d318976c FN |
225 | list = list->next; |
226 | continue; | |
227 | } | |
228 | ||
ebcd3b23 MS |
229 | /* A while command. Recursively print its subcommands and |
230 | continue. */ | |
a7bdde9e VP |
231 | if (list->control_type == while_control |
232 | || list->control_type == while_stepping_control) | |
d318976c | 233 | { |
ebcd3b23 MS |
234 | /* For while-stepping, the line includes the 'while-stepping' |
235 | token. See comment in process_next_line for explanation. | |
236 | Here, take care not print 'while-stepping' twice. */ | |
a7bdde9e | 237 | if (list->control_type == while_control) |
112e8700 | 238 | uiout->field_fmt (NULL, "while %s", list->line); |
a7bdde9e | 239 | else |
112e8700 SM |
240 | uiout->field_string (NULL, list->line); |
241 | uiout->text ("\n"); | |
d318976c | 242 | print_command_lines (uiout, *list->body_list, depth + 1); |
d318976c | 243 | if (depth) |
112e8700 SM |
244 | uiout->spaces (2 * depth); |
245 | uiout->field_string (NULL, "end"); | |
246 | uiout->text ("\n"); | |
d318976c FN |
247 | list = list->next; |
248 | continue; | |
249 | } | |
250 | ||
ebcd3b23 MS |
251 | /* An if command. Recursively print both arms before |
252 | continueing. */ | |
d318976c FN |
253 | if (list->control_type == if_control) |
254 | { | |
112e8700 SM |
255 | uiout->field_fmt (NULL, "if %s", list->line); |
256 | uiout->text ("\n"); | |
ebcd3b23 | 257 | /* The true arm. */ |
d318976c FN |
258 | print_command_lines (uiout, list->body_list[0], depth + 1); |
259 | ||
260 | /* Show the false arm if it exists. */ | |
261 | if (list->body_count == 2) | |
262 | { | |
263 | if (depth) | |
112e8700 SM |
264 | uiout->spaces (2 * depth); |
265 | uiout->field_string (NULL, "else"); | |
266 | uiout->text ("\n"); | |
d318976c FN |
267 | print_command_lines (uiout, list->body_list[1], depth + 1); |
268 | } | |
269 | ||
d318976c | 270 | if (depth) |
112e8700 SM |
271 | uiout->spaces (2 * depth); |
272 | uiout->field_string (NULL, "end"); | |
273 | uiout->text ("\n"); | |
d318976c FN |
274 | list = list->next; |
275 | continue; | |
276 | } | |
277 | ||
ebcd3b23 MS |
278 | /* A commands command. Print the breakpoint commands and |
279 | continue. */ | |
40c03ae8 EZ |
280 | if (list->control_type == commands_control) |
281 | { | |
282 | if (*(list->line)) | |
112e8700 | 283 | uiout->field_fmt (NULL, "commands %s", list->line); |
40c03ae8 | 284 | else |
112e8700 SM |
285 | uiout->field_string (NULL, "commands"); |
286 | uiout->text ("\n"); | |
40c03ae8 EZ |
287 | print_command_lines (uiout, *list->body_list, depth + 1); |
288 | if (depth) | |
112e8700 SM |
289 | uiout->spaces (2 * depth); |
290 | uiout->field_string (NULL, "end"); | |
291 | uiout->text ("\n"); | |
40c03ae8 EZ |
292 | list = list->next; |
293 | continue; | |
294 | } | |
295 | ||
d57a3c85 TJB |
296 | if (list->control_type == python_control) |
297 | { | |
112e8700 SM |
298 | uiout->field_string (NULL, "python"); |
299 | uiout->text ("\n"); | |
d57a3c85 TJB |
300 | /* Don't indent python code at all. */ |
301 | print_command_lines (uiout, *list->body_list, 0); | |
302 | if (depth) | |
112e8700 SM |
303 | uiout->spaces (2 * depth); |
304 | uiout->field_string (NULL, "end"); | |
305 | uiout->text ("\n"); | |
d57a3c85 TJB |
306 | list = list->next; |
307 | continue; | |
308 | } | |
309 | ||
bb2ec1b3 TT |
310 | if (list->control_type == compile_control) |
311 | { | |
112e8700 SM |
312 | uiout->field_string (NULL, "compile expression"); |
313 | uiout->text ("\n"); | |
bb2ec1b3 TT |
314 | print_command_lines (uiout, *list->body_list, 0); |
315 | if (depth) | |
112e8700 SM |
316 | uiout->spaces (2 * depth); |
317 | uiout->field_string (NULL, "end"); | |
318 | uiout->text ("\n"); | |
bb2ec1b3 TT |
319 | list = list->next; |
320 | continue; | |
321 | } | |
322 | ||
ed3ef339 DE |
323 | if (list->control_type == guile_control) |
324 | { | |
112e8700 SM |
325 | uiout->field_string (NULL, "guile"); |
326 | uiout->text ("\n"); | |
ed3ef339 DE |
327 | print_command_lines (uiout, *list->body_list, depth + 1); |
328 | if (depth) | |
112e8700 SM |
329 | uiout->spaces (2 * depth); |
330 | uiout->field_string (NULL, "end"); | |
331 | uiout->text ("\n"); | |
ed3ef339 DE |
332 | list = list->next; |
333 | continue; | |
334 | } | |
335 | ||
ebcd3b23 | 336 | /* Ignore illegal command type and try next. */ |
d318976c FN |
337 | list = list->next; |
338 | } /* while (list) */ | |
339 | } | |
d318976c | 340 | |
5913bcb0 AC |
341 | /* Handle pre-post hooks. */ |
342 | ||
a9921622 | 343 | class scoped_restore_hook_in |
5913bcb0 | 344 | { |
a9921622 | 345 | public: |
cdb27c12 | 346 | |
a9921622 TT |
347 | scoped_restore_hook_in (struct cmd_list_element *c) |
348 | : m_cmd (c) | |
349 | { | |
350 | } | |
351 | ||
352 | ~scoped_restore_hook_in () | |
353 | { | |
354 | m_cmd->hook_in = 0; | |
355 | } | |
356 | ||
357 | scoped_restore_hook_in (const scoped_restore_hook_in &) = delete; | |
358 | scoped_restore_hook_in &operator= (const scoped_restore_hook_in &) = delete; | |
359 | ||
360 | private: | |
361 | ||
362 | struct cmd_list_element *m_cmd; | |
363 | }; | |
5913bcb0 AC |
364 | |
365 | void | |
366 | execute_cmd_pre_hook (struct cmd_list_element *c) | |
367 | { | |
368 | if ((c->hook_pre) && (!c->hook_in)) | |
369 | { | |
a9921622 | 370 | scoped_restore_hook_in restore_hook (c); |
ebcd3b23 | 371 | c->hook_in = 1; /* Prevent recursive hooking. */ |
95a6b0a1 | 372 | execute_user_command (c->hook_pre, nullptr); |
5913bcb0 AC |
373 | } |
374 | } | |
375 | ||
376 | void | |
377 | execute_cmd_post_hook (struct cmd_list_element *c) | |
378 | { | |
379 | if ((c->hook_post) && (!c->hook_in)) | |
380 | { | |
a9921622 | 381 | scoped_restore_hook_in restore_hook (c); |
ebcd3b23 | 382 | c->hook_in = 1; /* Prevent recursive hooking. */ |
95a6b0a1 | 383 | execute_user_command (c->hook_post, nullptr); |
5913bcb0 AC |
384 | } |
385 | } | |
386 | ||
d318976c | 387 | void |
95a6b0a1 | 388 | execute_user_command (struct cmd_list_element *c, const char *args) |
d318976c | 389 | { |
f38d3ad1 | 390 | struct ui *ui = current_ui; |
d5b5ac79 | 391 | struct command_line *cmdlines; |
d318976c | 392 | enum command_control_type ret; |
883b9c6c | 393 | extern unsigned int max_user_call_depth; |
d318976c | 394 | |
d318976c FN |
395 | cmdlines = c->user_commands; |
396 | if (cmdlines == 0) | |
397 | /* Null command */ | |
398 | return; | |
399 | ||
df3ee9ca | 400 | scoped_user_args_level push_user_args (args); |
5fe41fbf | 401 | |
ac991630 | 402 | if (user_args_stack.size () > max_user_call_depth) |
8a3fe4f8 | 403 | error (_("Max user call depth exceeded -- command aborted.")); |
20f01a46 | 404 | |
d318976c FN |
405 | /* Set the instream to 0, indicating execution of a |
406 | user-defined function. */ | |
3c9ebddd TT |
407 | scoped_restore restore_instream |
408 | = make_scoped_restore (&ui->instream, nullptr); | |
698ba934 | 409 | |
b7b633e9 | 410 | scoped_restore save_async = make_scoped_restore (¤t_ui->async, 0); |
b4a14fd0 | 411 | |
b51b225e TT |
412 | scoped_restore save_nesting |
413 | = make_scoped_restore (&command_nest_depth, command_nest_depth + 1); | |
d318976c FN |
414 | while (cmdlines) |
415 | { | |
416 | ret = execute_control_command (cmdlines); | |
417 | if (ret != simple_control && ret != break_control) | |
418 | { | |
40c03ae8 | 419 | warning (_("Error executing canned sequence of commands.")); |
d318976c FN |
420 | break; |
421 | } | |
422 | cmdlines = cmdlines->next; | |
423 | } | |
d318976c FN |
424 | } |
425 | ||
ebcd3b23 MS |
426 | /* This function is called every time GDB prints a prompt. It ensures |
427 | that errors and the like do not confuse the command tracing. */ | |
16026cd7 AS |
428 | |
429 | void | |
430 | reset_command_nest_depth (void) | |
431 | { | |
432 | command_nest_depth = 1; | |
433 | ||
434 | /* Just in case. */ | |
435 | suppress_next_print_command_trace = 0; | |
436 | } | |
437 | ||
438 | /* Print the command, prefixed with '+' to represent the call depth. | |
439 | This is slightly complicated because this function may be called | |
440 | from execute_command and execute_control_command. Unfortunately | |
441 | execute_command also prints the top level control commands. | |
442 | In these cases execute_command will call execute_control_command | |
443 | via while_command or if_command. Inner levels of 'if' and 'while' | |
444 | are dealt with directly. Therefore we can use these functions | |
445 | to determine whether the command has been printed already or not. */ | |
446 | void | |
447 | print_command_trace (const char *cmd) | |
448 | { | |
449 | int i; | |
450 | ||
451 | if (suppress_next_print_command_trace) | |
452 | { | |
453 | suppress_next_print_command_trace = 0; | |
454 | return; | |
455 | } | |
456 | ||
457 | if (!source_verbose && !trace_commands) | |
458 | return; | |
459 | ||
460 | for (i=0; i < command_nest_depth; i++) | |
461 | printf_filtered ("+"); | |
462 | ||
463 | printf_filtered ("%s\n", cmd); | |
464 | } | |
465 | ||
3a87ae65 SM |
466 | /* Helper for execute_control_command. */ |
467 | ||
468 | static enum command_control_type | |
469 | execute_control_command_1 (struct command_line *cmd) | |
d318976c | 470 | { |
d318976c | 471 | struct command_line *current; |
f976f6d4 AC |
472 | struct value *val; |
473 | struct value *val_mark; | |
d318976c FN |
474 | int loop; |
475 | enum command_control_type ret; | |
d318976c | 476 | |
4d2acc65 AC |
477 | /* Start by assuming failure, if a problem is detected, the code |
478 | below will simply "break" out of the switch. */ | |
479 | ret = invalid_control; | |
480 | ||
d318976c FN |
481 | switch (cmd->control_type) |
482 | { | |
483 | case simple_control: | |
b0646401 PA |
484 | { |
485 | /* A simple command, execute it and return. */ | |
01770bbd | 486 | std::string new_line = insert_user_defined_cmd_args (cmd->line); |
95a6b0a1 | 487 | execute_command (new_line.c_str (), 0); |
b0646401 PA |
488 | ret = cmd->control_type; |
489 | break; | |
490 | } | |
d318976c FN |
491 | |
492 | case continue_control: | |
16026cd7 AS |
493 | print_command_trace ("loop_continue"); |
494 | ||
495 | /* Return for "continue", and "break" so we can either | |
496 | continue the loop at the top, or break out. */ | |
497 | ret = cmd->control_type; | |
498 | break; | |
499 | ||
d318976c | 500 | case break_control: |
16026cd7 AS |
501 | print_command_trace ("loop_break"); |
502 | ||
d318976c FN |
503 | /* Return for "continue", and "break" so we can either |
504 | continue the loop at the top, or break out. */ | |
505 | ret = cmd->control_type; | |
506 | break; | |
507 | ||
508 | case while_control: | |
509 | { | |
8c042590 | 510 | int len = strlen (cmd->line) + 7; |
224c3ddb | 511 | char *buffer = (char *) alloca (len); |
cdb27c12 | 512 | |
8c042590 | 513 | xsnprintf (buffer, len, "while %s", cmd->line); |
16026cd7 AS |
514 | print_command_trace (buffer); |
515 | ||
d318976c | 516 | /* Parse the loop control expression for the while statement. */ |
01770bbd | 517 | std::string new_line = insert_user_defined_cmd_args (cmd->line); |
4d01a485 | 518 | expression_up expr = parse_expression (new_line.c_str ()); |
d318976c FN |
519 | |
520 | ret = simple_control; | |
521 | loop = 1; | |
522 | ||
523 | /* Keep iterating so long as the expression is true. */ | |
524 | while (loop == 1) | |
525 | { | |
526 | int cond_result; | |
527 | ||
528 | QUIT; | |
529 | ||
530 | /* Evaluate the expression. */ | |
531 | val_mark = value_mark (); | |
4d01a485 | 532 | val = evaluate_expression (expr.get ()); |
d318976c FN |
533 | cond_result = value_true (val); |
534 | value_free_to_mark (val_mark); | |
535 | ||
536 | /* If the value is false, then break out of the loop. */ | |
537 | if (!cond_result) | |
538 | break; | |
539 | ||
540 | /* Execute the body of the while statement. */ | |
541 | current = *cmd->body_list; | |
542 | while (current) | |
543 | { | |
b51b225e TT |
544 | scoped_restore save_nesting |
545 | = make_scoped_restore (&command_nest_depth, command_nest_depth + 1); | |
3a87ae65 | 546 | ret = execute_control_command_1 (current); |
d318976c FN |
547 | |
548 | /* If we got an error, or a "break" command, then stop | |
549 | looping. */ | |
550 | if (ret == invalid_control || ret == break_control) | |
551 | { | |
552 | loop = 0; | |
553 | break; | |
554 | } | |
555 | ||
556 | /* If we got a "continue" command, then restart the loop | |
557 | at this point. */ | |
558 | if (ret == continue_control) | |
559 | break; | |
560 | ||
561 | /* Get the next statement. */ | |
562 | current = current->next; | |
563 | } | |
564 | } | |
565 | ||
566 | /* Reset RET so that we don't recurse the break all the way down. */ | |
567 | if (ret == break_control) | |
568 | ret = simple_control; | |
569 | ||
570 | break; | |
571 | } | |
572 | ||
573 | case if_control: | |
574 | { | |
8c042590 | 575 | int len = strlen (cmd->line) + 4; |
224c3ddb | 576 | char *buffer = (char *) alloca (len); |
cdb27c12 | 577 | |
8c042590 | 578 | xsnprintf (buffer, len, "if %s", cmd->line); |
16026cd7 AS |
579 | print_command_trace (buffer); |
580 | ||
d318976c | 581 | /* Parse the conditional for the if statement. */ |
01770bbd | 582 | std::string new_line = insert_user_defined_cmd_args (cmd->line); |
4d01a485 | 583 | expression_up expr = parse_expression (new_line.c_str ()); |
d318976c FN |
584 | |
585 | current = NULL; | |
586 | ret = simple_control; | |
587 | ||
588 | /* Evaluate the conditional. */ | |
589 | val_mark = value_mark (); | |
4d01a485 | 590 | val = evaluate_expression (expr.get ()); |
d318976c | 591 | |
ebcd3b23 MS |
592 | /* Choose which arm to take commands from based on the value |
593 | of the conditional expression. */ | |
d318976c FN |
594 | if (value_true (val)) |
595 | current = *cmd->body_list; | |
596 | else if (cmd->body_count == 2) | |
597 | current = *(cmd->body_list + 1); | |
598 | value_free_to_mark (val_mark); | |
599 | ||
600 | /* Execute commands in the given arm. */ | |
601 | while (current) | |
602 | { | |
b51b225e TT |
603 | scoped_restore save_nesting |
604 | = make_scoped_restore (&command_nest_depth, command_nest_depth + 1); | |
3a87ae65 | 605 | ret = execute_control_command_1 (current); |
d318976c FN |
606 | |
607 | /* If we got an error, get out. */ | |
608 | if (ret != simple_control) | |
609 | break; | |
610 | ||
611 | /* Get the next statement in the body. */ | |
612 | current = current->next; | |
613 | } | |
614 | ||
615 | break; | |
616 | } | |
1e9c71b8 | 617 | |
40c03ae8 EZ |
618 | case commands_control: |
619 | { | |
ebcd3b23 MS |
620 | /* Breakpoint commands list, record the commands in the |
621 | breakpoint's command list and return. */ | |
01770bbd | 622 | std::string new_line = insert_user_defined_cmd_args (cmd->line); |
b0646401 | 623 | ret = commands_from_control_command (new_line.c_str (), cmd); |
40c03ae8 EZ |
624 | break; |
625 | } | |
1e9c71b8 | 626 | |
bb2ec1b3 | 627 | case compile_control: |
5c65b58a JK |
628 | eval_compile_command (cmd, NULL, cmd->control_u.compile.scope, |
629 | cmd->control_u.compile.scope_data); | |
bb2ec1b3 TT |
630 | ret = simple_control; |
631 | break; | |
632 | ||
d57a3c85 | 633 | case python_control: |
ed3ef339 | 634 | case guile_control: |
d57a3c85 | 635 | { |
6dddc817 | 636 | eval_ext_lang_from_control_command (cmd); |
d57a3c85 TJB |
637 | ret = simple_control; |
638 | break; | |
639 | } | |
d318976c FN |
640 | |
641 | default: | |
40c03ae8 | 642 | warning (_("Invalid control type in canned commands structure.")); |
4d2acc65 | 643 | break; |
d318976c FN |
644 | } |
645 | ||
d318976c FN |
646 | return ret; |
647 | } | |
648 | ||
3a87ae65 SM |
649 | enum command_control_type |
650 | execute_control_command (struct command_line *cmd) | |
651 | { | |
652 | /* Make sure we use the console uiout. It's possible that we are executing | |
653 | breakpoint commands while running the MI interpreter. */ | |
654 | interp *console = interp_lookup (current_ui, INTERP_CONSOLE); | |
655 | scoped_restore save_uiout | |
656 | = make_scoped_restore (¤t_uiout, interp_ui_out (console)); | |
657 | ||
658 | return execute_control_command_1 (cmd); | |
659 | } | |
660 | ||
d57a3c85 | 661 | /* Like execute_control_command, but first set |
ebcd3b23 | 662 | suppress_next_print_command_trace. */ |
d57a3c85 TJB |
663 | |
664 | enum command_control_type | |
665 | execute_control_command_untraced (struct command_line *cmd) | |
666 | { | |
667 | suppress_next_print_command_trace = 1; | |
668 | return execute_control_command (cmd); | |
669 | } | |
670 | ||
671 | ||
d318976c FN |
672 | /* "while" command support. Executes a body of statements while the |
673 | loop condition is nonzero. */ | |
674 | ||
2370e853 | 675 | static void |
0b39b52e | 676 | while_command (const char *arg, int from_tty) |
d318976c | 677 | { |
d318976c | 678 | control_level = 1; |
93921405 | 679 | command_line_up command = get_command_line (while_control, arg); |
d318976c FN |
680 | |
681 | if (command == NULL) | |
682 | return; | |
683 | ||
b7b633e9 | 684 | scoped_restore save_async = make_scoped_restore (¤t_ui->async, 0); |
b4a14fd0 | 685 | |
93921405 | 686 | execute_control_command_untraced (command.get ()); |
d318976c FN |
687 | } |
688 | ||
689 | /* "if" command support. Execute either the true or false arm depending | |
690 | on the value of the if conditional. */ | |
691 | ||
2370e853 | 692 | static void |
0b39b52e | 693 | if_command (const char *arg, int from_tty) |
d318976c | 694 | { |
d318976c | 695 | control_level = 1; |
93921405 | 696 | command_line_up command = get_command_line (if_control, arg); |
d318976c FN |
697 | |
698 | if (command == NULL) | |
699 | return; | |
700 | ||
b7b633e9 | 701 | scoped_restore save_async = make_scoped_restore (¤t_ui->async, 0); |
b4a14fd0 | 702 | |
93921405 | 703 | execute_control_command_untraced (command.get ()); |
d318976c FN |
704 | } |
705 | ||
df3ee9ca PA |
706 | /* Bind the incoming arguments for a user defined command to $arg0, |
707 | $arg1 ... $argN. */ | |
d318976c | 708 | |
df3ee9ca | 709 | user_args::user_args (const char *command_line) |
d318976c | 710 | { |
df3ee9ca | 711 | const char *p; |
d318976c | 712 | |
df3ee9ca PA |
713 | if (command_line == NULL) |
714 | return; | |
d318976c | 715 | |
df3ee9ca PA |
716 | m_command_line = command_line; |
717 | p = m_command_line.c_str (); | |
e28493f2 | 718 | |
d318976c FN |
719 | while (*p) |
720 | { | |
df3ee9ca | 721 | const char *start_arg; |
d318976c FN |
722 | int squote = 0; |
723 | int dquote = 0; | |
724 | int bsquote = 0; | |
725 | ||
d318976c FN |
726 | /* Strip whitespace. */ |
727 | while (*p == ' ' || *p == '\t') | |
728 | p++; | |
729 | ||
730 | /* P now points to an argument. */ | |
731 | start_arg = p; | |
d318976c FN |
732 | |
733 | /* Get to the end of this argument. */ | |
734 | while (*p) | |
735 | { | |
736 | if (((*p == ' ' || *p == '\t')) && !squote && !dquote && !bsquote) | |
737 | break; | |
738 | else | |
739 | { | |
740 | if (bsquote) | |
741 | bsquote = 0; | |
742 | else if (*p == '\\') | |
743 | bsquote = 1; | |
744 | else if (squote) | |
745 | { | |
746 | if (*p == '\'') | |
747 | squote = 0; | |
748 | } | |
749 | else if (dquote) | |
750 | { | |
751 | if (*p == '"') | |
752 | dquote = 0; | |
753 | } | |
754 | else | |
755 | { | |
756 | if (*p == '\'') | |
757 | squote = 1; | |
758 | else if (*p == '"') | |
759 | dquote = 1; | |
760 | } | |
761 | p++; | |
762 | } | |
763 | } | |
764 | ||
df3ee9ca | 765 | m_args.emplace_back (start_arg, p - start_arg); |
d318976c | 766 | } |
d318976c FN |
767 | } |
768 | ||
ebcd3b23 MS |
769 | /* Given character string P, return a point to the first argument |
770 | ($arg), or NULL if P contains no arguments. */ | |
d318976c | 771 | |
b0646401 PA |
772 | static const char * |
773 | locate_arg (const char *p) | |
d318976c FN |
774 | { |
775 | while ((p = strchr (p, '$'))) | |
776 | { | |
61012eef | 777 | if (startswith (p, "$arg") |
c03c782f | 778 | && (isdigit (p[4]) || p[4] == 'c')) |
d318976c FN |
779 | return p; |
780 | p++; | |
781 | } | |
782 | return NULL; | |
783 | } | |
784 | ||
01770bbd | 785 | /* See cli-script.h. */ |
d318976c | 786 | |
01770bbd PA |
787 | std::string |
788 | insert_user_defined_cmd_args (const char *line) | |
d318976c | 789 | { |
01770bbd | 790 | /* If we are not in a user-defined command, treat $argc, $arg0, et |
61d9b92f | 791 | cetera as normal convenience variables. */ |
df3ee9ca | 792 | if (user_args_stack.empty ()) |
b0646401 | 793 | return line; |
61d9b92f | 794 | |
df3ee9ca PA |
795 | const std::unique_ptr<user_args> &args = user_args_stack.back (); |
796 | return args->insert_args (line); | |
797 | } | |
798 | ||
799 | /* Insert the user defined arguments stored in user_args into the $arg | |
800 | arguments found in line. */ | |
801 | ||
802 | std::string | |
803 | user_args::insert_args (const char *line) const | |
804 | { | |
b0646401 PA |
805 | std::string new_line; |
806 | const char *p; | |
d318976c FN |
807 | |
808 | while ((p = locate_arg (line))) | |
809 | { | |
b0646401 | 810 | new_line.append (line, p - line); |
d318976c | 811 | |
c03c782f AS |
812 | if (p[4] == 'c') |
813 | { | |
df3ee9ca PA |
814 | new_line += std::to_string (m_args.size ()); |
815 | line = p + 5; | |
c03c782f AS |
816 | } |
817 | else | |
d318976c | 818 | { |
df3ee9ca PA |
819 | char *tmp; |
820 | unsigned long i; | |
821 | ||
822 | errno = 0; | |
823 | i = strtoul (p + 4, &tmp, 10); | |
824 | if ((i == 0 && tmp == p + 4) || errno != 0) | |
825 | line = p + 4; | |
826 | else if (i >= m_args.size ()) | |
827 | error (_("Missing argument %ld in user function."), i); | |
828 | else | |
829 | { | |
830 | new_line.append (m_args[i].str, m_args[i].len); | |
831 | line = tmp; | |
832 | } | |
d318976c | 833 | } |
d318976c FN |
834 | } |
835 | /* Don't forget the tail. */ | |
b0646401 | 836 | new_line.append (line); |
d318976c | 837 | |
b0646401 | 838 | return new_line; |
d318976c FN |
839 | } |
840 | ||
841 | \f | |
842 | /* Expand the body_list of COMMAND so that it can hold NEW_LENGTH | |
843 | code bodies. This is typically used when we encounter an "else" | |
844 | clause for an "if" command. */ | |
845 | ||
846 | static void | |
847 | realloc_body_list (struct command_line *command, int new_length) | |
848 | { | |
849 | int n; | |
850 | struct command_line **body_list; | |
851 | ||
852 | n = command->body_count; | |
853 | ||
854 | /* Nothing to do? */ | |
855 | if (new_length <= n) | |
856 | return; | |
857 | ||
8d749320 | 858 | body_list = XCNEWVEC (struct command_line *, new_length); |
d318976c FN |
859 | |
860 | memcpy (body_list, command->body_list, sizeof (struct command_line *) * n); | |
861 | ||
b8c9b27d | 862 | xfree (command->body_list); |
d318976c FN |
863 | command->body_list = body_list; |
864 | command->body_count = new_length; | |
865 | } | |
866 | ||
2181a6c6 | 867 | /* Read next line from stdin. Passed to read_command_line_1 and |
3c1179ff | 868 | recurse_read_control_structure whenever we need to read commands |
2181a6c6 | 869 | from stdin. */ |
d318976c | 870 | |
3c1179ff | 871 | static char * |
a58d7472 | 872 | read_next_line (void) |
d318976c | 873 | { |
f38d3ad1 | 874 | struct ui *ui = current_ui; |
3c1179ff | 875 | char *prompt_ptr, control_prompt[256]; |
d318976c | 876 | int i = 0; |
268a799a | 877 | int from_tty = ui->instream == ui->stdin_stream; |
d318976c FN |
878 | |
879 | if (control_level >= 254) | |
8a3fe4f8 | 880 | error (_("Control nesting too deep!")); |
d318976c FN |
881 | |
882 | /* Set a prompt based on the nesting of the control commands. */ | |
268a799a | 883 | if (from_tty |
f38d3ad1 | 884 | || (ui->instream == 0 && deprecated_readline_hook != NULL)) |
d318976c FN |
885 | { |
886 | for (i = 0; i < control_level; i++) | |
887 | control_prompt[i] = ' '; | |
888 | control_prompt[i] = '>'; | |
889 | control_prompt[i + 1] = '\0'; | |
890 | prompt_ptr = (char *) &control_prompt[0]; | |
891 | } | |
892 | else | |
893 | prompt_ptr = NULL; | |
894 | ||
268a799a | 895 | return command_line_input (prompt_ptr, from_tty, "commands"); |
3c1179ff VP |
896 | } |
897 | ||
604c4576 JG |
898 | /* Return true if CMD's name is NAME. */ |
899 | ||
900 | static bool | |
901 | command_name_equals (struct cmd_list_element *cmd, const char *name) | |
902 | { | |
903 | return (cmd != NULL | |
904 | && cmd != CMD_LIST_AMBIGUOUS | |
905 | && strcmp (cmd->name, name) == 0); | |
906 | } | |
907 | ||
908 | /* Given an input line P, skip the command and return a pointer to the | |
909 | first argument. */ | |
910 | ||
911 | static const char * | |
912 | line_first_arg (const char *p) | |
913 | { | |
914 | const char *first_arg = p + find_command_name_length (p); | |
915 | ||
f1735a53 | 916 | return skip_spaces (first_arg); |
604c4576 JG |
917 | } |
918 | ||
ebcd3b23 MS |
919 | /* Process one input line. If the command is an "end", return such an |
920 | indication to the caller. If PARSE_COMMANDS is true, strip leading | |
921 | whitespace (trailing whitespace is always stripped) in the line, | |
922 | attempt to recognize GDB control commands, and also return an | |
923 | indication if the command is an "else" or a nop. | |
924 | ||
3c1179ff VP |
925 | Otherwise, only "end" is recognized. */ |
926 | ||
927 | static enum misc_command_type | |
a7bdde9e VP |
928 | process_next_line (char *p, struct command_line **command, int parse_commands, |
929 | void (*validator)(char *, void *), void *closure) | |
3c1179ff | 930 | { |
50cb2941 JK |
931 | char *p_end; |
932 | char *p_start; | |
3c1179ff | 933 | int not_handled = 0; |
d318976c FN |
934 | |
935 | /* Not sure what to do here. */ | |
936 | if (p == NULL) | |
937 | return end_command; | |
938 | ||
311a4e6b | 939 | /* Strip trailing whitespace. */ |
50cb2941 JK |
940 | p_end = p + strlen (p); |
941 | while (p_end > p && (p_end[-1] == ' ' || p_end[-1] == '\t')) | |
942 | p_end--; | |
d318976c | 943 | |
50cb2941 | 944 | p_start = p; |
3630a92d | 945 | /* Strip leading whitespace. */ |
50cb2941 JK |
946 | while (p_start < p_end && (*p_start == ' ' || *p_start == '\t')) |
947 | p_start++; | |
d318976c | 948 | |
ebcd3b23 | 949 | /* 'end' is always recognized, regardless of parse_commands value. |
3630a92d | 950 | We also permit whitespace before end and after. */ |
61012eef | 951 | if (p_end - p_start == 3 && startswith (p_start, "end")) |
3630a92d | 952 | return end_command; |
604c4576 | 953 | |
311a4e6b | 954 | if (parse_commands) |
d318976c | 955 | { |
604c4576 JG |
956 | /* Resolve command abbreviations (e.g. 'ws' for 'while-stepping'). */ |
957 | const char *cmd_name = p; | |
958 | struct cmd_list_element *cmd | |
959 | = lookup_cmd_1 (&cmd_name, cmdlist, NULL, 1); | |
f1735a53 | 960 | cmd_name = skip_spaces (cmd_name); |
dc4bde35 | 961 | bool inline_cmd = *cmd_name != '\0'; |
604c4576 | 962 | |
ebcd3b23 | 963 | /* If commands are parsed, we skip initial spaces. Otherwise, |
3630a92d VP |
964 | which is the case for Python commands and documentation |
965 | (see the 'document' command), spaces are preserved. */ | |
50cb2941 | 966 | p = p_start; |
3630a92d | 967 | |
311a4e6b | 968 | /* Blanks and comments don't really do anything, but we need to |
ebcd3b23 MS |
969 | distinguish them from else, end and other commands which can |
970 | be executed. */ | |
50cb2941 | 971 | if (p_end == p || p[0] == '#') |
311a4e6b TJB |
972 | return nop_command; |
973 | ||
974 | /* Is the else clause of an if control structure? */ | |
61012eef | 975 | if (p_end - p == 4 && startswith (p, "else")) |
311a4e6b TJB |
976 | return else_command; |
977 | ||
ebcd3b23 MS |
978 | /* Check for while, if, break, continue, etc and build a new |
979 | command line structure for them. */ | |
604c4576 | 980 | if (command_name_equals (cmd, "while-stepping")) |
a7bdde9e VP |
981 | { |
982 | /* Because validate_actionline and encode_action lookup | |
983 | command's line as command, we need the line to | |
984 | include 'while-stepping'. | |
985 | ||
986 | For 'ws' alias, the command will have 'ws', not expanded | |
ebcd3b23 | 987 | to 'while-stepping'. This is intentional -- we don't |
a7bdde9e | 988 | really want frontend to send a command list with 'ws', |
ebcd3b23 MS |
989 | and next break-info returning command line with |
990 | 'while-stepping'. This should work, but might cause the | |
991 | breakpoint to be marked as changed while it's actually | |
992 | not. */ | |
a7bdde9e VP |
993 | *command = build_command_line (while_stepping_control, p); |
994 | } | |
604c4576 | 995 | else if (command_name_equals (cmd, "while")) |
311a4e6b | 996 | { |
604c4576 | 997 | *command = build_command_line (while_control, line_first_arg (p)); |
311a4e6b | 998 | } |
604c4576 | 999 | else if (command_name_equals (cmd, "if")) |
311a4e6b | 1000 | { |
604c4576 | 1001 | *command = build_command_line (if_control, line_first_arg (p)); |
311a4e6b | 1002 | } |
604c4576 | 1003 | else if (command_name_equals (cmd, "commands")) |
311a4e6b | 1004 | { |
604c4576 | 1005 | *command = build_command_line (commands_control, line_first_arg (p)); |
311a4e6b | 1006 | } |
dc4bde35 | 1007 | else if (command_name_equals (cmd, "python") && !inline_cmd) |
311a4e6b TJB |
1008 | { |
1009 | /* Note that we ignore the inline "python command" form | |
1010 | here. */ | |
1011 | *command = build_command_line (python_control, ""); | |
1012 | } | |
dc4bde35 | 1013 | else if (command_name_equals (cmd, "compile") && !inline_cmd) |
bb2ec1b3 TT |
1014 | { |
1015 | /* Note that we ignore the inline "compile command" form | |
1016 | here. */ | |
1017 | *command = build_command_line (compile_control, ""); | |
1018 | (*command)->control_u.compile.scope = COMPILE_I_INVALID_SCOPE; | |
1019 | } | |
dc4bde35 | 1020 | else if (command_name_equals (cmd, "guile") && !inline_cmd) |
ed3ef339 DE |
1021 | { |
1022 | /* Note that we ignore the inline "guile command" form here. */ | |
1023 | *command = build_command_line (guile_control, ""); | |
1024 | } | |
61012eef | 1025 | else if (p_end - p == 10 && startswith (p, "loop_break")) |
311a4e6b | 1026 | { |
8d749320 | 1027 | *command = XNEW (struct command_line); |
311a4e6b TJB |
1028 | (*command)->next = NULL; |
1029 | (*command)->line = NULL; | |
1030 | (*command)->control_type = break_control; | |
1031 | (*command)->body_count = 0; | |
1032 | (*command)->body_list = NULL; | |
1033 | } | |
61012eef | 1034 | else if (p_end - p == 13 && startswith (p, "loop_continue")) |
311a4e6b | 1035 | { |
8d749320 | 1036 | *command = XNEW (struct command_line); |
311a4e6b TJB |
1037 | (*command)->next = NULL; |
1038 | (*command)->line = NULL; | |
1039 | (*command)->control_type = continue_control; | |
1040 | (*command)->body_count = 0; | |
1041 | (*command)->body_list = NULL; | |
1042 | } | |
1043 | else | |
1044 | not_handled = 1; | |
d318976c | 1045 | } |
311a4e6b TJB |
1046 | |
1047 | if (!parse_commands || not_handled) | |
d318976c FN |
1048 | { |
1049 | /* A normal command. */ | |
8d749320 | 1050 | *command = XNEW (struct command_line); |
d318976c | 1051 | (*command)->next = NULL; |
50cb2941 | 1052 | (*command)->line = savestring (p, p_end - p); |
d318976c FN |
1053 | (*command)->control_type = simple_control; |
1054 | (*command)->body_count = 0; | |
1055 | (*command)->body_list = NULL; | |
1056 | } | |
1057 | ||
a7bdde9e VP |
1058 | if (validator) |
1059 | { | |
cdb27c12 | 1060 | |
492d29ea | 1061 | TRY |
a7bdde9e VP |
1062 | { |
1063 | validator ((*command)->line, closure); | |
1064 | } | |
492d29ea | 1065 | CATCH (ex, RETURN_MASK_ALL) |
a7bdde9e VP |
1066 | { |
1067 | xfree (*command); | |
1068 | throw_exception (ex); | |
1069 | } | |
492d29ea | 1070 | END_CATCH |
a7bdde9e VP |
1071 | } |
1072 | ||
d318976c FN |
1073 | /* Nothing special. */ |
1074 | return ok_command; | |
1075 | } | |
1076 | ||
ebcd3b23 MS |
1077 | /* Recursively read in the control structures and create a |
1078 | command_line structure from them. Use read_next_line_func to | |
1079 | obtain lines of the command. */ | |
d318976c FN |
1080 | |
1081 | static enum command_control_type | |
a58d7472 | 1082 | recurse_read_control_structure (char * (*read_next_line_func) (void), |
a7bdde9e VP |
1083 | struct command_line *current_cmd, |
1084 | void (*validator)(char *, void *), | |
1085 | void *closure) | |
d318976c FN |
1086 | { |
1087 | int current_body, i; | |
1088 | enum misc_command_type val; | |
1089 | enum command_control_type ret; | |
1090 | struct command_line **body_ptr, *child_tail, *next; | |
1091 | ||
1092 | child_tail = NULL; | |
1093 | current_body = 1; | |
1094 | ||
1095 | /* Sanity checks. */ | |
1096 | if (current_cmd->control_type == simple_control) | |
8a3fe4f8 | 1097 | error (_("Recursed on a simple control type.")); |
d318976c FN |
1098 | |
1099 | if (current_body > current_cmd->body_count) | |
8a3fe4f8 | 1100 | error (_("Allocated body is smaller than this command type needs.")); |
d318976c FN |
1101 | |
1102 | /* Read lines from the input stream and build control structures. */ | |
1103 | while (1) | |
1104 | { | |
1105 | dont_repeat (); | |
1106 | ||
1107 | next = NULL; | |
3c1179ff | 1108 | val = process_next_line (read_next_line_func (), &next, |
ed3ef339 | 1109 | current_cmd->control_type != python_control |
bb2ec1b3 TT |
1110 | && current_cmd->control_type != guile_control |
1111 | && current_cmd->control_type != compile_control, | |
a7bdde9e | 1112 | validator, closure); |
d318976c FN |
1113 | |
1114 | /* Just skip blanks and comments. */ | |
1115 | if (val == nop_command) | |
1116 | continue; | |
1117 | ||
1118 | if (val == end_command) | |
1119 | { | |
1e9c71b8 | 1120 | if (multi_line_command_p (current_cmd->control_type)) |
d318976c | 1121 | { |
40c03ae8 | 1122 | /* Success reading an entire canned sequence of commands. */ |
d318976c FN |
1123 | ret = simple_control; |
1124 | break; | |
1125 | } | |
1126 | else | |
1127 | { | |
1128 | ret = invalid_control; | |
1129 | break; | |
1130 | } | |
1131 | } | |
1132 | ||
1133 | /* Not the end of a control structure. */ | |
1134 | if (val == else_command) | |
1135 | { | |
1136 | if (current_cmd->control_type == if_control | |
1137 | && current_body == 1) | |
1138 | { | |
1139 | realloc_body_list (current_cmd, 2); | |
1140 | current_body = 2; | |
1141 | child_tail = NULL; | |
1142 | continue; | |
1143 | } | |
1144 | else | |
1145 | { | |
1146 | ret = invalid_control; | |
1147 | break; | |
1148 | } | |
1149 | } | |
1150 | ||
1151 | if (child_tail) | |
1152 | { | |
1153 | child_tail->next = next; | |
1154 | } | |
1155 | else | |
1156 | { | |
1157 | body_ptr = current_cmd->body_list; | |
1158 | for (i = 1; i < current_body; i++) | |
1159 | body_ptr++; | |
1160 | ||
1161 | *body_ptr = next; | |
1162 | ||
1163 | } | |
1164 | ||
1165 | child_tail = next; | |
1166 | ||
1167 | /* If the latest line is another control structure, then recurse | |
1168 | on it. */ | |
1e9c71b8 | 1169 | if (multi_line_command_p (next->control_type)) |
d318976c FN |
1170 | { |
1171 | control_level++; | |
a7bdde9e VP |
1172 | ret = recurse_read_control_structure (read_next_line_func, next, |
1173 | validator, closure); | |
d318976c FN |
1174 | control_level--; |
1175 | ||
1176 | if (ret != simple_control) | |
1177 | break; | |
1178 | } | |
1179 | } | |
1180 | ||
1181 | dont_repeat (); | |
1182 | ||
1183 | return ret; | |
1184 | } | |
1185 | ||
1186 | /* Read lines from the input stream and accumulate them in a chain of | |
1187 | struct command_line's, which is then returned. For input from a | |
1188 | terminal, the special command "end" is used to mark the end of the | |
311a4e6b TJB |
1189 | input, and is not included in the returned chain of commands. |
1190 | ||
1191 | If PARSE_COMMANDS is true, strip leading whitespace (trailing whitespace | |
1192 | is always stripped) in the line and attempt to recognize GDB control | |
1193 | commands. Otherwise, only "end" is recognized. */ | |
d318976c FN |
1194 | |
1195 | #define END_MESSAGE "End with a line saying just \"end\"." | |
1196 | ||
93921405 | 1197 | command_line_up |
a7bdde9e VP |
1198 | read_command_lines (char *prompt_arg, int from_tty, int parse_commands, |
1199 | void (*validator)(char *, void *), void *closure) | |
d318976c | 1200 | { |
268a799a | 1201 | if (from_tty && input_interactive_p (current_ui)) |
d318976c | 1202 | { |
698ba934 DJ |
1203 | if (deprecated_readline_begin_hook) |
1204 | { | |
ebcd3b23 | 1205 | /* Note - intentional to merge messages with no newline. */ |
9a2b4c1b MS |
1206 | (*deprecated_readline_begin_hook) ("%s %s\n", prompt_arg, |
1207 | END_MESSAGE); | |
698ba934 DJ |
1208 | } |
1209 | else | |
1210 | { | |
1211 | printf_unfiltered ("%s\n%s\n", prompt_arg, END_MESSAGE); | |
1212 | gdb_flush (gdb_stdout); | |
1213 | } | |
d318976c FN |
1214 | } |
1215 | ||
c41535fd EZ |
1216 | |
1217 | /* Reading commands assumes the CLI behavior, so temporarily | |
1218 | override the current interpreter with CLI. */ | |
93921405 | 1219 | command_line_up head; |
c41535fd EZ |
1220 | if (current_interp_named_p (INTERP_CONSOLE)) |
1221 | head = read_command_lines_1 (read_next_line, parse_commands, | |
1222 | validator, closure); | |
1223 | else | |
1224 | { | |
be0d7abb | 1225 | scoped_restore_interp interp_restorer (INTERP_CONSOLE); |
c41535fd EZ |
1226 | |
1227 | head = read_command_lines_1 (read_next_line, parse_commands, | |
1228 | validator, closure); | |
c41535fd | 1229 | } |
3c1179ff | 1230 | |
268a799a PA |
1231 | if (from_tty && input_interactive_p (current_ui) |
1232 | && deprecated_readline_end_hook) | |
3c1179ff VP |
1233 | { |
1234 | (*deprecated_readline_end_hook) (); | |
1235 | } | |
1236 | return (head); | |
1237 | } | |
1238 | ||
1239 | /* Act the same way as read_command_lines, except that each new line is | |
1240 | obtained using READ_NEXT_LINE_FUNC. */ | |
1241 | ||
93921405 | 1242 | command_line_up |
a7bdde9e VP |
1243 | read_command_lines_1 (char * (*read_next_line_func) (void), int parse_commands, |
1244 | void (*validator)(char *, void *), void *closure) | |
3c1179ff | 1245 | { |
93921405 TT |
1246 | struct command_line *tail, *next; |
1247 | command_line_up head; | |
3c1179ff VP |
1248 | enum command_control_type ret; |
1249 | enum misc_command_type val; | |
1250 | ||
1251 | control_level = 0; | |
93921405 | 1252 | tail = NULL; |
d318976c FN |
1253 | |
1254 | while (1) | |
1255 | { | |
f429d7d0 | 1256 | dont_repeat (); |
a7bdde9e VP |
1257 | val = process_next_line (read_next_line_func (), &next, parse_commands, |
1258 | validator, closure); | |
d318976c FN |
1259 | |
1260 | /* Ignore blank lines or comments. */ | |
1261 | if (val == nop_command) | |
1262 | continue; | |
1263 | ||
1264 | if (val == end_command) | |
1265 | { | |
1266 | ret = simple_control; | |
1267 | break; | |
1268 | } | |
1269 | ||
1270 | if (val != ok_command) | |
1271 | { | |
1272 | ret = invalid_control; | |
1273 | break; | |
1274 | } | |
1275 | ||
1e9c71b8 | 1276 | if (multi_line_command_p (next->control_type)) |
d318976c FN |
1277 | { |
1278 | control_level++; | |
a7bdde9e VP |
1279 | ret = recurse_read_control_structure (read_next_line_func, next, |
1280 | validator, closure); | |
d318976c FN |
1281 | control_level--; |
1282 | ||
1283 | if (ret == invalid_control) | |
1284 | break; | |
1285 | } | |
1286 | ||
1287 | if (tail) | |
1288 | { | |
1289 | tail->next = next; | |
1290 | } | |
1291 | else | |
1292 | { | |
93921405 | 1293 | head.reset (next); |
d318976c FN |
1294 | } |
1295 | tail = next; | |
1296 | } | |
1297 | ||
1298 | dont_repeat (); | |
1299 | ||
93921405 TT |
1300 | if (ret == invalid_control) |
1301 | return NULL; | |
d318976c | 1302 | |
3c1179ff | 1303 | return head; |
d318976c FN |
1304 | } |
1305 | ||
1306 | /* Free a chain of struct command_line's. */ | |
1307 | ||
1308 | void | |
1309 | free_command_lines (struct command_line **lptr) | |
1310 | { | |
d5b5ac79 AC |
1311 | struct command_line *l = *lptr; |
1312 | struct command_line *next; | |
d318976c FN |
1313 | struct command_line **blist; |
1314 | int i; | |
1315 | ||
1316 | while (l) | |
1317 | { | |
1318 | if (l->body_count > 0) | |
1319 | { | |
1320 | blist = l->body_list; | |
1321 | for (i = 0; i < l->body_count; i++, blist++) | |
1322 | free_command_lines (blist); | |
1323 | } | |
1324 | next = l->next; | |
b8c9b27d KB |
1325 | xfree (l->line); |
1326 | xfree (l); | |
d318976c FN |
1327 | l = next; |
1328 | } | |
0d70f41b | 1329 | *lptr = NULL; |
d318976c FN |
1330 | } |
1331 | ||
93921405 | 1332 | command_line_up |
c2b8ed2c MS |
1333 | copy_command_lines (struct command_line *cmds) |
1334 | { | |
1335 | struct command_line *result = NULL; | |
1336 | ||
1337 | if (cmds) | |
1338 | { | |
8d749320 | 1339 | result = XNEW (struct command_line); |
c2b8ed2c | 1340 | |
93921405 | 1341 | result->next = copy_command_lines (cmds->next).release (); |
c2b8ed2c MS |
1342 | result->line = xstrdup (cmds->line); |
1343 | result->control_type = cmds->control_type; | |
1344 | result->body_count = cmds->body_count; | |
1345 | if (cmds->body_count > 0) | |
1346 | { | |
1347 | int i; | |
1348 | ||
8d749320 | 1349 | result->body_list = XNEWVEC (struct command_line *, cmds->body_count); |
c2b8ed2c MS |
1350 | |
1351 | for (i = 0; i < cmds->body_count; i++) | |
93921405 TT |
1352 | result->body_list[i] |
1353 | = copy_command_lines (cmds->body_list[i]).release (); | |
c2b8ed2c MS |
1354 | } |
1355 | else | |
1356 | result->body_list = NULL; | |
1357 | } | |
1358 | ||
93921405 | 1359 | return command_line_up (result); |
c2b8ed2c | 1360 | } |
d318976c | 1361 | \f |
adb483fe DJ |
1362 | /* Validate that *COMNAME is a valid name for a command. Return the |
1363 | containing command list, in case it starts with a prefix command. | |
1364 | The prefix must already exist. *COMNAME is advanced to point after | |
1365 | any prefix, and a NUL character overwrites the space after the | |
1366 | prefix. */ | |
1367 | ||
1368 | static struct cmd_list_element ** | |
0b39b52e | 1369 | validate_comname (const char **comname) |
d318976c | 1370 | { |
adb483fe | 1371 | struct cmd_list_element **list = &cmdlist; |
0b39b52e | 1372 | const char *p, *last_word; |
d318976c | 1373 | |
adb483fe | 1374 | if (*comname == 0) |
e2e0b3e5 | 1375 | error_no_arg (_("name of command to define")); |
d318976c | 1376 | |
adb483fe DJ |
1377 | /* Find the last word of the argument. */ |
1378 | p = *comname + strlen (*comname); | |
1379 | while (p > *comname && isspace (p[-1])) | |
1380 | p--; | |
1381 | while (p > *comname && !isspace (p[-1])) | |
1382 | p--; | |
1383 | last_word = p; | |
1384 | ||
1385 | /* Find the corresponding command list. */ | |
1386 | if (last_word != *comname) | |
1387 | { | |
1388 | struct cmd_list_element *c; | |
adb483fe DJ |
1389 | |
1390 | /* Separate the prefix and the command. */ | |
0b39b52e TT |
1391 | std::string prefix (*comname, last_word - 1); |
1392 | const char *tem = prefix.c_str (); | |
adb483fe DJ |
1393 | |
1394 | c = lookup_cmd (&tem, cmdlist, "", 0, 1); | |
1395 | if (c->prefixlist == NULL) | |
0b39b52e | 1396 | error (_("\"%s\" is not a prefix command."), prefix.c_str ()); |
adb483fe DJ |
1397 | |
1398 | list = c->prefixlist; | |
adb483fe DJ |
1399 | *comname = last_word; |
1400 | } | |
1401 | ||
1402 | p = *comname; | |
d318976c FN |
1403 | while (*p) |
1404 | { | |
1405 | if (!isalnum (*p) && *p != '-' && *p != '_') | |
8a3fe4f8 | 1406 | error (_("Junk in argument list: \"%s\""), p); |
d318976c FN |
1407 | p++; |
1408 | } | |
adb483fe DJ |
1409 | |
1410 | return list; | |
d318976c FN |
1411 | } |
1412 | ||
1413 | /* This is just a placeholder in the command data structures. */ | |
1414 | static void | |
898241a5 | 1415 | user_defined_command (const char *ignore, int from_tty) |
d318976c FN |
1416 | { |
1417 | } | |
1418 | ||
2370e853 | 1419 | static void |
0b39b52e | 1420 | define_command (const char *comname, int from_tty) |
d318976c FN |
1421 | { |
1422 | #define MAX_TMPBUF 128 | |
1423 | enum cmd_hook_type | |
1424 | { | |
1425 | CMD_NO_HOOK = 0, | |
1426 | CMD_PRE_HOOK, | |
1427 | CMD_POST_HOOK | |
1428 | }; | |
d36fc00b | 1429 | struct cmd_list_element *c, *newc, *hookc = 0, **list; |
0b39b52e | 1430 | const char *tem, *comfull; |
d318976c FN |
1431 | char tmpbuf[MAX_TMPBUF]; |
1432 | int hook_type = CMD_NO_HOOK; | |
1433 | int hook_name_size = 0; | |
1434 | ||
1435 | #define HOOK_STRING "hook-" | |
1436 | #define HOOK_LEN 5 | |
1437 | #define HOOK_POST_STRING "hookpost-" | |
1438 | #define HOOK_POST_LEN 9 | |
1439 | ||
adb483fe DJ |
1440 | comfull = comname; |
1441 | list = validate_comname (&comname); | |
d318976c FN |
1442 | |
1443 | /* Look it up, and verify that we got an exact match. */ | |
0b39b52e TT |
1444 | tem = comname; |
1445 | c = lookup_cmd (&tem, *list, "", -1, 1); | |
5cb316ef | 1446 | if (c && strcmp (comname, c->name) != 0) |
d318976c FN |
1447 | c = 0; |
1448 | ||
1449 | if (c) | |
1450 | { | |
ab4e3d93 | 1451 | int q; |
cdb27c12 | 1452 | |
fe978cb0 | 1453 | if (c->theclass == class_user || c->theclass == class_alias) |
e2e0b3e5 | 1454 | q = query (_("Redefine command \"%s\"? "), c->name); |
d318976c | 1455 | else |
e2e0b3e5 | 1456 | q = query (_("Really redefine built-in command \"%s\"? "), c->name); |
ab4e3d93 | 1457 | if (!q) |
8a3fe4f8 | 1458 | error (_("Command \"%s\" not redefined."), c->name); |
d318976c FN |
1459 | } |
1460 | ||
1461 | /* If this new command is a hook, then mark the command which it | |
1462 | is hooking. Note that we allow hooking `help' commands, so that | |
1463 | we can hook the `stop' pseudo-command. */ | |
1464 | ||
1465 | if (!strncmp (comname, HOOK_STRING, HOOK_LEN)) | |
1466 | { | |
1467 | hook_type = CMD_PRE_HOOK; | |
1468 | hook_name_size = HOOK_LEN; | |
1469 | } | |
1470 | else if (!strncmp (comname, HOOK_POST_STRING, HOOK_POST_LEN)) | |
1471 | { | |
1472 | hook_type = CMD_POST_HOOK; | |
1473 | hook_name_size = HOOK_POST_LEN; | |
1474 | } | |
1475 | ||
1476 | if (hook_type != CMD_NO_HOOK) | |
1477 | { | |
1478 | /* Look up cmd it hooks, and verify that we got an exact match. */ | |
0b39b52e TT |
1479 | tem = comname + hook_name_size; |
1480 | hookc = lookup_cmd (&tem, *list, "", -1, 0); | |
5cb316ef | 1481 | if (hookc && strcmp (comname + hook_name_size, hookc->name) != 0) |
d318976c FN |
1482 | hookc = 0; |
1483 | if (!hookc) | |
1484 | { | |
9a2b4c1b MS |
1485 | warning (_("Your new `%s' command does not " |
1486 | "hook any existing command."), | |
adb483fe | 1487 | comfull); |
9e2f0ad4 | 1488 | if (!query (_("Proceed? "))) |
8a3fe4f8 | 1489 | error (_("Not confirmed.")); |
d318976c FN |
1490 | } |
1491 | } | |
1492 | ||
1b36a34b | 1493 | comname = xstrdup (comname); |
d318976c | 1494 | |
8c042590 PM |
1495 | xsnprintf (tmpbuf, sizeof (tmpbuf), |
1496 | "Type commands for definition of \"%s\".", comfull); | |
93921405 | 1497 | command_line_up cmds = read_command_lines (tmpbuf, from_tty, 1, 0, 0); |
d318976c | 1498 | |
fe978cb0 | 1499 | if (c && c->theclass == class_user) |
d318976c FN |
1500 | free_command_lines (&c->user_commands); |
1501 | ||
1502 | newc = add_cmd (comname, class_user, user_defined_command, | |
fe978cb0 | 1503 | (c && c->theclass == class_user) |
1b36a34b | 1504 | ? c->doc : xstrdup ("User-defined."), list); |
93921405 | 1505 | newc->user_commands = cmds.release (); |
d318976c FN |
1506 | |
1507 | /* If this new command is a hook, then mark both commands as being | |
1508 | tied. */ | |
1509 | if (hookc) | |
1510 | { | |
1511 | switch (hook_type) | |
1512 | { | |
1513 | case CMD_PRE_HOOK: | |
1514 | hookc->hook_pre = newc; /* Target gets hooked. */ | |
ebcd3b23 | 1515 | newc->hookee_pre = hookc; /* We are marked as hooking target cmd. */ |
d318976c FN |
1516 | break; |
1517 | case CMD_POST_HOOK: | |
f48ff60a | 1518 | hookc->hook_post = newc; /* Target gets hooked. */ |
9a2b4c1b MS |
1519 | newc->hookee_post = hookc; /* We are marked as hooking |
1520 | 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 | ||
2370e853 | 1529 | static void |
0b39b52e | 1530 | document_command (const char *comname, int from_tty) |
d318976c | 1531 | { |
adb483fe | 1532 | struct cmd_list_element *c, **list; |
6f937416 | 1533 | const char *tem; |
0b39b52e | 1534 | const char *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 | 1542 | |
fe978cb0 | 1543 | if (c->theclass != class_user) |
adb483fe | 1544 | error (_("Command \"%s\" is built-in."), comfull); |
d318976c | 1545 | |
8c042590 PM |
1546 | xsnprintf (tmpbuf, sizeof (tmpbuf), "Type documentation for \"%s\".", |
1547 | comfull); | |
93921405 | 1548 | command_line_up doclines = read_command_lines (tmpbuf, from_tty, 0, 0, 0); |
d318976c FN |
1549 | |
1550 | if (c->doc) | |
1947513d | 1551 | xfree ((char *) c->doc); |
d318976c FN |
1552 | |
1553 | { | |
d5b5ac79 AC |
1554 | struct command_line *cl1; |
1555 | int len = 0; | |
1947513d | 1556 | char *doc; |
d318976c | 1557 | |
93921405 | 1558 | for (cl1 = doclines.get (); cl1; cl1 = cl1->next) |
d318976c FN |
1559 | len += strlen (cl1->line) + 1; |
1560 | ||
1947513d TT |
1561 | doc = (char *) xmalloc (len + 1); |
1562 | *doc = 0; | |
d318976c | 1563 | |
93921405 | 1564 | for (cl1 = doclines.get (); cl1; cl1 = cl1->next) |
d318976c | 1565 | { |
1947513d | 1566 | strcat (doc, cl1->line); |
d318976c | 1567 | if (cl1->next) |
1947513d | 1568 | strcat (doc, "\n"); |
d318976c | 1569 | } |
1947513d TT |
1570 | |
1571 | c->doc = doc; | |
d318976c | 1572 | } |
d318976c FN |
1573 | } |
1574 | \f | |
ebcd3b23 | 1575 | /* Used to implement source_command. */ |
d318976c FN |
1576 | |
1577 | void | |
05159abe | 1578 | script_from_file (FILE *stream, const char *file) |
d318976c | 1579 | { |
d318976c | 1580 | if (stream == NULL) |
e2e0b3e5 | 1581 | internal_error (__FILE__, __LINE__, _("called with NULL file pointer!")); |
d318976c | 1582 | |
2ec845e7 TT |
1583 | scoped_restore restore_line_number |
1584 | = make_scoped_restore (&source_line_number, 0); | |
1585 | scoped_restore resotre_file | |
1586 | = make_scoped_restore (&source_file_name, file); | |
cdb27c12 | 1587 | |
2ec845e7 | 1588 | scoped_restore save_async = make_scoped_restore (¤t_ui->async, 0); |
d318976c | 1589 | |
2ec845e7 TT |
1590 | TRY |
1591 | { | |
1592 | read_command_file (stream); | |
1593 | } | |
1594 | CATCH (e, RETURN_MASK_ERROR) | |
1595 | { | |
1596 | /* Re-throw the error, but with the file name information | |
1597 | prepended. */ | |
1598 | throw_error (e.error, | |
1599 | _("%s:%d: Error in sourced command file:\n%s"), | |
1600 | source_file_name, source_line_number, e.message); | |
1601 | } | |
1602 | END_CATCH | |
d318976c FN |
1603 | } |
1604 | ||
adb483fe DJ |
1605 | /* Print the definition of user command C to STREAM. Or, if C is a |
1606 | prefix command, show the definitions of all user commands under C | |
1607 | (recursively). PREFIX and NAME combined are the name of the | |
1608 | current command. */ | |
d318976c | 1609 | void |
6f937416 | 1610 | show_user_1 (struct cmd_list_element *c, const char *prefix, const char *name, |
adb483fe | 1611 | struct ui_file *stream) |
d318976c | 1612 | { |
d5b5ac79 | 1613 | struct command_line *cmdlines; |
d318976c | 1614 | |
adb483fe DJ |
1615 | if (c->prefixlist != NULL) |
1616 | { | |
64e61d29 | 1617 | const char *prefixname = c->prefixname; |
cdb27c12 | 1618 | |
adb483fe | 1619 | for (c = *c->prefixlist; c != NULL; c = c->next) |
fe978cb0 | 1620 | if (c->theclass == class_user || c->prefixlist != NULL) |
adb483fe DJ |
1621 | show_user_1 (c, prefixname, c->name, gdb_stdout); |
1622 | return; | |
1623 | } | |
1624 | ||
d318976c | 1625 | cmdlines = c->user_commands; |
adb483fe | 1626 | fprintf_filtered (stream, "User command \"%s%s\":\n", prefix, name); |
d318976c | 1627 | |
a9f116cb GKB |
1628 | if (!cmdlines) |
1629 | return; | |
79a45e25 | 1630 | print_command_lines (current_uiout, cmdlines, 1); |
d318976c | 1631 | fputs_filtered ("\n", stream); |
d318976c FN |
1632 | } |
1633 | ||
2370e853 TT |
1634 | void |
1635 | _initialize_cli_script (void) | |
1636 | { | |
1637 | add_com ("document", class_support, document_command, _("\ | |
1638 | Document a user-defined command.\n\ | |
1639 | Give command name as argument. Give documentation on following lines.\n\ | |
1640 | End with a line of just \"end\".")); | |
1641 | add_com ("define", class_support, define_command, _("\ | |
1642 | Define a new command name. Command name is argument.\n\ | |
1643 | Definition appears on following lines, one command per line.\n\ | |
1644 | End with a line of just \"end\".\n\ | |
1645 | Use the \"document\" command to give documentation for the new command.\n\ | |
1646 | Commands defined in this way may have up to ten arguments.")); | |
1647 | ||
1648 | add_com ("while", class_support, while_command, _("\ | |
1649 | Execute nested commands WHILE the conditional expression is non zero.\n\ | |
1650 | The conditional expression must follow the word `while' and must in turn be\n\ | |
1651 | followed by a new line. The nested commands must be entered one per line,\n\ | |
1652 | and should be terminated by the word `end'.")); | |
1653 | ||
1654 | add_com ("if", class_support, if_command, _("\ | |
1655 | Execute nested commands once IF the conditional expression is non zero.\n\ | |
1656 | The conditional expression must follow the word `if' and must in turn be\n\ | |
1657 | followed by a new line. The nested commands must be entered one per line,\n\ | |
1658 | and should be terminated by the word 'else' or `end'. If an else clause\n\ | |
1659 | is used, the same rules apply to its nested commands as to the first ones.")); | |
1660 | } |