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172559ec JK |
1 | /* Top level stuff for GDB, the GNU debugger. |
2 | Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994 | |
3 | Free Software Foundation, Inc. | |
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 | |
9 | the Free Software Foundation; either version 2 of the License, or | |
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 | |
18 | along with this program; if not, write to the Free Software | |
19 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
20 | ||
21 | #include "defs.h" | |
22 | #include "gdbcmd.h" | |
23 | #include "call-cmds.h" | |
24 | #include "symtab.h" | |
25 | #include "inferior.h" | |
26 | #include "signals.h" | |
27 | #include "target.h" | |
28 | #include "breakpoint.h" | |
29 | #include "gdbtypes.h" | |
30 | #include "expression.h" | |
e52bfe0c | 31 | #include "value.h" |
172559ec JK |
32 | #include "language.h" |
33 | #include "terminal.h" /* For job_control. */ | |
34 | #include "annotate.h" | |
35 | #include <setjmp.h> | |
36 | #include "top.h" | |
37 | ||
38 | /* readline include files */ | |
39 | #include "readline.h" | |
40 | #include "history.h" | |
41 | ||
42 | /* readline defines this. */ | |
43 | #undef savestring | |
44 | ||
45 | #include <sys/types.h> | |
46 | #ifdef USG | |
47 | /* What is this for? X_OK? */ | |
48 | #include <unistd.h> | |
49 | #endif | |
50 | ||
51 | #include <string.h> | |
52 | #ifndef NO_SYS_FILE | |
53 | #include <sys/file.h> | |
54 | #endif | |
55 | #include <sys/param.h> | |
56 | #include <sys/stat.h> | |
57 | #include <ctype.h> | |
58 | ||
59 | /* Prototypes for local functions */ | |
60 | ||
e52bfe0c | 61 | static char * symbol_completion_function PARAMS ((char *, int)); |
172559ec | 62 | |
e52bfe0c | 63 | static void command_loop_marker PARAMS ((int)); |
172559ec | 64 | |
e52bfe0c | 65 | static void while_command PARAMS ((char *, int)); |
172559ec | 66 | |
e52bfe0c | 67 | static void if_command PARAMS ((char *, int)); |
172559ec | 68 | |
e52bfe0c JL |
69 | static enum command_control_type |
70 | execute_control_command PARAMS ((struct command_line *)); | |
172559ec | 71 | |
e52bfe0c JL |
72 | static struct command_line * |
73 | build_command_line PARAMS ((enum command_control_type, char *)); | |
172559ec | 74 | |
e52bfe0c JL |
75 | static struct command_line * |
76 | get_command_line PARAMS ((enum command_control_type, char *)); | |
172559ec | 77 | |
e52bfe0c | 78 | static void realloc_body_list PARAMS ((struct command_line *, int)); |
172559ec | 79 | |
e52bfe0c | 80 | static enum misc_command_type read_next_line PARAMS ((struct command_line **)); |
172559ec | 81 | |
e52bfe0c JL |
82 | static enum command_control_type |
83 | recurse_read_control_structure PARAMS ((struct command_line *)); | |
172559ec | 84 | |
e52bfe0c | 85 | static void init_main PARAMS ((void)); |
172559ec | 86 | |
e52bfe0c | 87 | static void init_cmd_lists PARAMS ((void)); |
172559ec | 88 | |
e52bfe0c | 89 | static void float_handler PARAMS ((int)); |
172559ec | 90 | |
e52bfe0c | 91 | static void init_signals PARAMS ((void)); |
172559ec | 92 | |
e52bfe0c | 93 | static void set_verbose PARAMS ((char *, int, struct cmd_list_element *)); |
172559ec | 94 | |
e52bfe0c | 95 | static void show_history PARAMS ((char *, int)); |
172559ec | 96 | |
e52bfe0c | 97 | static void set_history PARAMS ((char *, int)); |
172559ec | 98 | |
e52bfe0c JL |
99 | static void set_history_size_command PARAMS ((char *, int, |
100 | struct cmd_list_element *)); | |
172559ec | 101 | |
e52bfe0c | 102 | static void show_commands PARAMS ((char *, int)); |
172559ec | 103 | |
e52bfe0c | 104 | static void echo_command PARAMS ((char *, int)); |
172559ec | 105 | |
e52bfe0c | 106 | static void pwd_command PARAMS ((char *, int)); |
172559ec | 107 | |
e52bfe0c | 108 | static void show_version PARAMS ((char *, int)); |
172559ec | 109 | |
e52bfe0c | 110 | static void document_command PARAMS ((char *, int)); |
172559ec | 111 | |
e52bfe0c | 112 | static void define_command PARAMS ((char *, int)); |
172559ec | 113 | |
e52bfe0c JL |
114 | static void validate_comname PARAMS ((char *)); |
115 | ||
116 | static void help_command PARAMS ((char *, int)); | |
117 | ||
118 | static void show_command PARAMS ((char *, int)); | |
119 | ||
120 | static void info_command PARAMS ((char *, int)); | |
121 | ||
122 | static void complete_command PARAMS ((char *, int)); | |
123 | ||
124 | static void do_nothing PARAMS ((int)); | |
125 | ||
126 | static int quit_cover PARAMS ((char *)); | |
127 | ||
128 | static void disconnect PARAMS ((int)); | |
129 | ||
130 | static void source_cleanup PARAMS ((FILE *)); | |
172559ec JK |
131 | |
132 | /* If this definition isn't overridden by the header files, assume | |
133 | that isatty and fileno exist on this system. */ | |
134 | #ifndef ISATTY | |
135 | #define ISATTY(FP) (isatty (fileno (FP))) | |
136 | #endif | |
137 | ||
138 | /* Initialization file name for gdb. This is overridden in some configs. */ | |
139 | ||
140 | #ifndef GDBINIT_FILENAME | |
141 | #define GDBINIT_FILENAME ".gdbinit" | |
142 | #endif | |
143 | char gdbinit[] = GDBINIT_FILENAME; | |
144 | int inhibit_gdbinit = 0; | |
145 | ||
754e5da2 SG |
146 | /* Disable windows if non-zero */ |
147 | ||
148 | int no_windows = 0; | |
149 | ||
172559ec JK |
150 | /* Version number of GDB, as a string. */ |
151 | ||
152 | extern char *version; | |
153 | ||
154 | /* Canonical host name as a string. */ | |
155 | ||
156 | extern char *host_name; | |
157 | ||
158 | /* Canonical target name as a string. */ | |
159 | ||
160 | extern char *target_name; | |
161 | ||
162 | extern char lang_frame_mismatch_warn[]; /* language.c */ | |
163 | ||
164 | /* Flag for whether we want all the "from_tty" gubbish printed. */ | |
165 | ||
166 | int caution = 1; /* Default is yes, sigh. */ | |
167 | ||
168 | /* | |
169 | * Define all cmd_list_element's | |
170 | */ | |
171 | ||
172 | /* Chain containing all defined commands. */ | |
173 | ||
174 | struct cmd_list_element *cmdlist; | |
175 | ||
176 | /* Chain containing all defined info subcommands. */ | |
177 | ||
178 | struct cmd_list_element *infolist; | |
179 | ||
180 | /* Chain containing all defined enable subcommands. */ | |
181 | ||
182 | struct cmd_list_element *enablelist; | |
183 | ||
184 | /* Chain containing all defined disable subcommands. */ | |
185 | ||
186 | struct cmd_list_element *disablelist; | |
187 | ||
188 | /* Chain containing all defined delete subcommands. */ | |
189 | ||
190 | struct cmd_list_element *deletelist; | |
191 | ||
192 | /* Chain containing all defined "enable breakpoint" subcommands. */ | |
193 | ||
194 | struct cmd_list_element *enablebreaklist; | |
195 | ||
196 | /* Chain containing all defined set subcommands */ | |
197 | ||
198 | struct cmd_list_element *setlist; | |
199 | ||
200 | /* Chain containing all defined unset subcommands */ | |
201 | ||
202 | struct cmd_list_element *unsetlist; | |
203 | ||
204 | /* Chain containing all defined show subcommands. */ | |
205 | ||
206 | struct cmd_list_element *showlist; | |
207 | ||
208 | /* Chain containing all defined \"set history\". */ | |
209 | ||
210 | struct cmd_list_element *sethistlist; | |
211 | ||
212 | /* Chain containing all defined \"show history\". */ | |
213 | ||
214 | struct cmd_list_element *showhistlist; | |
215 | ||
216 | /* Chain containing all defined \"unset history\". */ | |
217 | ||
218 | struct cmd_list_element *unsethistlist; | |
219 | ||
220 | /* Chain containing all defined maintenance subcommands. */ | |
221 | ||
222 | #if MAINTENANCE_CMDS | |
223 | struct cmd_list_element *maintenancelist; | |
224 | #endif | |
225 | ||
226 | /* Chain containing all defined "maintenance info" subcommands. */ | |
227 | ||
228 | #if MAINTENANCE_CMDS | |
229 | struct cmd_list_element *maintenanceinfolist; | |
230 | #endif | |
231 | ||
232 | /* Chain containing all defined "maintenance print" subcommands. */ | |
233 | ||
234 | #if MAINTENANCE_CMDS | |
235 | struct cmd_list_element *maintenanceprintlist; | |
236 | #endif | |
237 | ||
238 | struct cmd_list_element *setprintlist; | |
239 | ||
240 | struct cmd_list_element *showprintlist; | |
241 | ||
242 | struct cmd_list_element *setchecklist; | |
243 | ||
244 | struct cmd_list_element *showchecklist; | |
245 | ||
246 | /* stdio stream that command input is being read from. Set to stdin normally. | |
247 | Set by source_command to the file we are sourcing. Set to NULL if we are | |
248 | executing a user-defined command. */ | |
249 | ||
250 | FILE *instream; | |
251 | ||
252 | /* Current working directory. */ | |
253 | ||
254 | char *current_directory; | |
255 | ||
256 | /* The directory name is actually stored here (usually). */ | |
b7ec5b8d | 257 | char gdb_dirbuf[1024]; |
172559ec JK |
258 | |
259 | /* Function to call before reading a command, if nonzero. | |
260 | The function receives two args: an input stream, | |
261 | and a prompt string. */ | |
262 | ||
263 | void (*window_hook) PARAMS ((FILE *, char *)); | |
264 | ||
265 | int epoch_interface; | |
266 | int xgdb_verbose; | |
267 | ||
268 | /* gdb prints this when reading a command interactively */ | |
269 | static char *prompt; | |
270 | ||
271 | /* Buffer used for reading command lines, and the size | |
272 | allocated for it so far. */ | |
273 | ||
274 | char *line; | |
275 | int linesize = 100; | |
276 | ||
277 | /* Nonzero if the current command is modified by "server ". This | |
278 | affects things like recording into the command history, comamnds | |
279 | repeating on RETURN, etc. This is so a user interface (emacs, GUI, | |
280 | whatever) can issue its own commands and also send along commands | |
281 | from the user, and have the user not notice that the user interface | |
282 | is issuing commands too. */ | |
283 | int server_command; | |
284 | ||
285 | /* Baud rate specified for talking to serial target systems. Default | |
286 | is left as -1, so targets can choose their own defaults. */ | |
287 | /* FIXME: This means that "show remotebaud" and gr_files_info can print -1 | |
288 | or (unsigned int)-1. This is a Bad User Interface. */ | |
289 | ||
290 | int baud_rate = -1; | |
291 | ||
292 | /* Non-zero tells remote* modules to output debugging info. */ | |
293 | ||
294 | int remote_debug = 0; | |
295 | ||
e52bfe0c JL |
296 | /* Level of control structure. */ |
297 | static int control_level; | |
298 | ||
172559ec JK |
299 | /* Signal to catch ^Z typed while reading a command: SIGTSTP or SIGCONT. */ |
300 | ||
301 | #ifndef STOP_SIGNAL | |
302 | #ifdef SIGTSTP | |
303 | #define STOP_SIGNAL SIGTSTP | |
304 | static void stop_sig PARAMS ((int)); | |
305 | #endif | |
306 | #endif | |
307 | ||
308 | /* Some System V have job control but not sigsetmask(). */ | |
309 | #if !defined (HAVE_SIGSETMASK) | |
310 | #if !defined (USG) | |
311 | #define HAVE_SIGSETMASK 1 | |
312 | #else | |
313 | #define HAVE_SIGSETMASK 0 | |
314 | #endif | |
315 | #endif | |
316 | ||
317 | #if 0 == (HAVE_SIGSETMASK) | |
318 | #define sigsetmask(n) | |
319 | #endif | |
8164ec2e SG |
320 | |
321 | /* Hooks for alternate command interfaces. */ | |
322 | ||
323 | /* Called after most modules have been initialized, but before taking users | |
324 | command file. */ | |
325 | ||
326 | void (*init_ui_hook) PARAMS ((void)); | |
327 | ||
328 | /* Called instead of command_loop at top level. Can be invoked via | |
329 | return_to_top_level. */ | |
330 | ||
331 | void (*command_loop_hook) PARAMS ((void)); | |
332 | ||
333 | /* Called instead of fputs for all output. */ | |
334 | ||
335 | void (*fputs_unfiltered_hook) PARAMS ((const char *linebuffer)); | |
336 | ||
337 | /* Called from print_frame_info to list the line we stopped in. */ | |
338 | ||
339 | void (*print_frame_info_listing_hook) PARAMS ((struct symtab *s, int line, | |
340 | int stopline, int noerror)); | |
341 | /* Replaces most of query. */ | |
342 | ||
343 | int (*query_hook) PARAMS (()); | |
344 | ||
345 | /* Called from gdb_flush to flush output. */ | |
346 | ||
347 | void (*flush_hook) PARAMS ((FILE *stream)); | |
348 | ||
349 | /* Called as appropriate to notify the interface of the specified breakpoint | |
350 | conditions. */ | |
351 | ||
352 | void (*create_breakpoint_hook) PARAMS ((struct breakpoint *b)); | |
353 | void (*delete_breakpoint_hook) PARAMS ((struct breakpoint *bpt)); | |
354 | void (*enable_breakpoint_hook) PARAMS ((struct breakpoint *bpt)); | |
355 | void (*disable_breakpoint_hook) PARAMS ((struct breakpoint *bpt)); | |
172559ec JK |
356 | \f |
357 | /* Where to go for return_to_top_level (RETURN_ERROR). */ | |
358 | jmp_buf error_return; | |
359 | /* Where to go for return_to_top_level (RETURN_QUIT). */ | |
360 | jmp_buf quit_return; | |
361 | ||
362 | /* Return for reason REASON. This generally gets back to the command | |
363 | loop, but can be caught via catch_errors. */ | |
364 | ||
365 | NORETURN void | |
366 | return_to_top_level (reason) | |
367 | enum return_reason reason; | |
368 | { | |
369 | quit_flag = 0; | |
370 | immediate_quit = 0; | |
371 | ||
372 | /* Perhaps it would be cleaner to do this via the cleanup chain (not sure | |
373 | I can think of a reason why that is vital, though). */ | |
374 | bpstat_clear_actions(stop_bpstat); /* Clear queued breakpoint commands */ | |
375 | ||
376 | disable_current_display (); | |
377 | do_cleanups (ALL_CLEANUPS); | |
378 | ||
379 | if (annotation_level > 1) | |
380 | switch (reason) | |
381 | { | |
382 | case RETURN_QUIT: | |
383 | annotate_quit (); | |
384 | break; | |
385 | case RETURN_ERROR: | |
386 | annotate_error (); | |
387 | break; | |
388 | } | |
389 | ||
390 | (NORETURN void) longjmp | |
391 | (reason == RETURN_ERROR ? error_return : quit_return, 1); | |
392 | } | |
393 | ||
394 | /* Call FUNC with arg ARGS, catching any errors. If there is no | |
395 | error, return the value returned by FUNC. If there is an error, | |
396 | print ERRSTRING, print the specific error message, then return | |
397 | zero. | |
398 | ||
399 | Must not be called with immediate_quit in effect (bad things might | |
400 | happen, say we got a signal in the middle of a memcpy to quit_return). | |
401 | This is an OK restriction; with very few exceptions immediate_quit can | |
402 | be replaced by judicious use of QUIT. | |
403 | ||
404 | MASK specifies what to catch; it is normally set to | |
405 | RETURN_MASK_ALL, if for no other reason than that the code which | |
406 | calls catch_errors might not be set up to deal with a quit which | |
407 | isn't caught. But if the code can deal with it, it generally | |
408 | should be RETURN_MASK_ERROR, unless for some reason it is more | |
409 | useful to abort only the portion of the operation inside the | |
410 | catch_errors. Note that quit should return to the command line | |
411 | fairly quickly, even if some further processing is being done. */ | |
412 | ||
413 | int | |
414 | catch_errors (func, args, errstring, mask) | |
415 | int (*func) PARAMS ((char *)); | |
416 | PTR args; | |
417 | char *errstring; | |
418 | return_mask mask; | |
419 | { | |
420 | jmp_buf saved_error; | |
421 | jmp_buf saved_quit; | |
422 | jmp_buf tmp_jmp; | |
423 | int val; | |
424 | struct cleanup *saved_cleanup_chain; | |
425 | char *saved_error_pre_print; | |
426 | ||
427 | saved_cleanup_chain = save_cleanups (); | |
428 | saved_error_pre_print = error_pre_print; | |
429 | ||
430 | if (mask & RETURN_MASK_ERROR) | |
431 | memcpy ((char *)saved_error, (char *)error_return, sizeof (jmp_buf)); | |
432 | if (mask & RETURN_MASK_QUIT) | |
433 | memcpy (saved_quit, quit_return, sizeof (jmp_buf)); | |
434 | error_pre_print = errstring; | |
435 | ||
436 | if (setjmp (tmp_jmp) == 0) | |
437 | { | |
438 | if (mask & RETURN_MASK_ERROR) | |
439 | memcpy (error_return, tmp_jmp, sizeof (jmp_buf)); | |
440 | if (mask & RETURN_MASK_QUIT) | |
441 | memcpy (quit_return, tmp_jmp, sizeof (jmp_buf)); | |
442 | val = (*func) (args); | |
443 | } | |
444 | else | |
445 | val = 0; | |
446 | ||
447 | restore_cleanups (saved_cleanup_chain); | |
448 | ||
449 | error_pre_print = saved_error_pre_print; | |
450 | if (mask & RETURN_MASK_ERROR) | |
451 | memcpy (error_return, saved_error, sizeof (jmp_buf)); | |
452 | if (mask & RETURN_MASK_QUIT) | |
453 | memcpy (quit_return, saved_quit, sizeof (jmp_buf)); | |
454 | return val; | |
455 | } | |
456 | ||
457 | /* Handler for SIGHUP. */ | |
458 | ||
459 | static void | |
460 | disconnect (signo) | |
461 | int signo; | |
462 | { | |
463 | catch_errors (quit_cover, NULL, | |
464 | "Could not kill the program being debugged", RETURN_MASK_ALL); | |
465 | signal (SIGHUP, SIG_DFL); | |
466 | kill (getpid (), SIGHUP); | |
467 | } | |
468 | ||
469 | /* Just a little helper function for disconnect(). */ | |
470 | ||
471 | static int | |
472 | quit_cover (s) | |
473 | char *s; | |
474 | { | |
475 | caution = 0; /* Throw caution to the wind -- we're exiting. | |
476 | This prevents asking the user dumb questions. */ | |
477 | quit_command((char *)0, 0); | |
478 | return 0; | |
479 | } | |
480 | \f | |
481 | /* Line number we are currently in in a file which is being sourced. */ | |
482 | static int source_line_number; | |
483 | ||
484 | /* Name of the file we are sourcing. */ | |
485 | static char *source_file_name; | |
486 | ||
487 | /* Buffer containing the error_pre_print used by the source stuff. | |
488 | Malloc'd. */ | |
489 | static char *source_error; | |
490 | static int source_error_allocated; | |
491 | ||
492 | /* Something to glom on to the start of error_pre_print if source_file_name | |
493 | is set. */ | |
494 | static char *source_pre_error; | |
495 | ||
496 | /* Clean up on error during a "source" command (or execution of a | |
497 | user-defined command). */ | |
498 | ||
499 | static void | |
500 | source_cleanup (stream) | |
501 | FILE *stream; | |
502 | { | |
503 | /* Restore the previous input stream. */ | |
504 | instream = stream; | |
505 | } | |
506 | ||
507 | /* Read commands from STREAM. */ | |
508 | void | |
509 | read_command_file (stream) | |
510 | FILE *stream; | |
511 | { | |
512 | struct cleanup *cleanups; | |
513 | ||
514 | cleanups = make_cleanup (source_cleanup, instream); | |
515 | instream = stream; | |
516 | command_loop (); | |
517 | do_cleanups (cleanups); | |
518 | } | |
519 | \f | |
520 | extern void init_proc (); | |
521 | ||
522 | void | |
523 | gdb_init () | |
524 | { | |
525 | /* Run the init function of each source file */ | |
526 | ||
b7ec5b8d FF |
527 | getcwd (gdb_dirbuf, sizeof (gdb_dirbuf)); |
528 | current_directory = gdb_dirbuf; | |
f36b58b1 | 529 | |
172559ec | 530 | init_cmd_lists (); /* This needs to be done first */ |
754e5da2 SG |
531 | initialize_targets (); /* Setup target_terminal macros for utils.c */ |
532 | initialize_utils (); /* Make errors and warnings possible */ | |
172559ec JK |
533 | initialize_all_files (); |
534 | init_main (); /* But that omits this file! Do it now */ | |
535 | init_signals (); | |
536 | ||
537 | init_proc (); | |
538 | ||
539 | /* We need a default language for parsing expressions, so simple things like | |
540 | "set width 0" won't fail if no language is explicitly set in a config file | |
541 | or implicitly set by reading an executable during startup. */ | |
542 | set_language (language_c); | |
543 | expected_language = current_language; /* don't warn about the change. */ | |
754e5da2 SG |
544 | |
545 | if (init_ui_hook) | |
546 | init_ui_hook (); | |
172559ec JK |
547 | } |
548 | ||
e52bfe0c JL |
549 | /* Allocate, initialize a new command line structure for one of the |
550 | control commands (if/while). */ | |
551 | ||
552 | static struct command_line * | |
553 | build_command_line (type, args) | |
554 | enum command_control_type type; | |
555 | char *args; | |
556 | { | |
557 | struct command_line *cmd; | |
558 | ||
559 | cmd = (struct command_line *)xmalloc (sizeof (struct command_line)); | |
560 | cmd->next = NULL; | |
561 | cmd->control_type = type; | |
562 | ||
563 | cmd->body_count = 1; | |
564 | cmd->body_list | |
565 | = (struct command_line **)xmalloc (sizeof (struct command_line *) | |
566 | * cmd->body_count); | |
567 | memset (cmd->body_list, 0, sizeof (struct command_line *) * cmd->body_count); | |
568 | cmd->line = savestring (args, strlen (args)); | |
569 | return cmd; | |
570 | } | |
571 | ||
572 | /* Build and return a new command structure for the control commands | |
573 | such as "if" and "while". */ | |
574 | ||
575 | static struct command_line * | |
576 | get_command_line (type, arg) | |
577 | enum command_control_type type; | |
578 | char *arg; | |
579 | { | |
580 | struct command_line *cmd; | |
581 | struct cleanup *old_chain = NULL; | |
582 | ||
583 | /* Allocate and build a new command line structure. */ | |
584 | cmd = build_command_line (type, arg); | |
585 | ||
586 | old_chain = make_cleanup (free_command_lines, &cmd); | |
587 | ||
588 | /* Read in the body of this command. */ | |
589 | if (recurse_read_control_structure (cmd) == invalid_control) | |
590 | { | |
591 | warning ("error reading in control structure\n"); | |
592 | do_cleanups (old_chain); | |
593 | return NULL; | |
594 | } | |
595 | ||
596 | discard_cleanups (old_chain); | |
597 | return cmd; | |
598 | } | |
599 | ||
600 | /* Execute the command in CMD. */ | |
601 | ||
602 | static enum command_control_type | |
603 | execute_control_command (cmd) | |
604 | struct command_line *cmd; | |
605 | { | |
606 | struct expression *expr; | |
607 | struct command_line *current; | |
608 | struct cleanup *old_chain = 0; | |
609 | struct cleanup *tmp_chain; | |
610 | value_ptr val; | |
611 | int loop; | |
612 | enum command_control_type ret; | |
613 | ||
614 | switch (cmd->control_type) | |
615 | { | |
616 | case simple_control: | |
617 | /* A simple command, execute it and return. */ | |
618 | execute_command (cmd->line, 0); | |
619 | return cmd->control_type; | |
620 | ||
621 | case continue_control: | |
622 | case break_control: | |
623 | /* Return for "continue", and "break" so we can either | |
624 | continue the loop at the top, or break out. */ | |
625 | return cmd->control_type; | |
626 | ||
627 | case while_control: | |
628 | { | |
629 | /* Parse the loop control expression for the while statement. */ | |
630 | expr = parse_expression (cmd->line); | |
631 | tmp_chain = make_cleanup (free_current_contents, &expr); | |
632 | if (!old_chain) | |
633 | old_chain = tmp_chain; | |
634 | ||
635 | ret = simple_control; | |
636 | loop = true; | |
637 | ||
638 | /* Keep iterating so long as the expression is true. */ | |
639 | while (loop == true) | |
640 | { | |
641 | /* Evaluate the expression. */ | |
642 | val = evaluate_expression (expr); | |
643 | ||
644 | /* If the value is false, then break out of the loop. */ | |
645 | if (!value_true (val)) | |
646 | break; | |
647 | ||
648 | /* Execute the body of the while statement. */ | |
649 | current = *cmd->body_list; | |
650 | while (current) | |
651 | { | |
652 | ret = execute_control_command (current); | |
653 | ||
654 | /* If we got an error, or a "break" command, then stop | |
655 | looping. */ | |
656 | if (ret == invalid_control || ret == break_control) | |
657 | { | |
658 | loop = false; | |
659 | break; | |
660 | } | |
661 | ||
662 | /* If we got a "continue" command, then restart the loop | |
663 | at this point. */ | |
664 | if (ret == continue_control) | |
665 | break; | |
666 | ||
667 | /* Get the next statement. */ | |
668 | current = current->next; | |
669 | } | |
670 | } | |
671 | ||
672 | /* Reset RET so that we don't recurse the break all the way down. */ | |
673 | if (ret == break_control) | |
674 | ret = simple_control; | |
675 | ||
676 | break; | |
677 | } | |
678 | ||
679 | case if_control: | |
680 | { | |
681 | /* Parse the conditional for the if statement. */ | |
682 | expr = parse_expression (cmd->line); | |
683 | old_chain = make_cleanup (free_current_contents, &expr); | |
684 | ||
685 | current = NULL; | |
686 | ret = simple_control; | |
687 | ||
688 | /* Evaluate the conditional. */ | |
689 | val = evaluate_expression (expr); | |
690 | ||
691 | /* Choose which arm to take commands from based on the value of the | |
692 | conditional expression. */ | |
693 | if (value_true (val)) | |
694 | current = *cmd->body_list; | |
695 | else if (cmd->body_count == 2) | |
696 | current = *(cmd->body_list + 1); | |
697 | ||
698 | /* Execute commands in the given arm. */ | |
699 | while (current) | |
700 | { | |
701 | ret = execute_control_command (current); | |
702 | ||
703 | /* If we got an error, get out. */ | |
704 | if (ret != simple_control) | |
705 | break; | |
706 | ||
707 | /* Get the next statement in the body. */ | |
708 | current = current->next; | |
709 | } | |
710 | break; | |
711 | } | |
712 | ||
713 | default: | |
714 | warning ("Invalid control type in command structure."); | |
715 | return invalid_control; | |
716 | } | |
717 | ||
718 | if (old_chain) | |
719 | do_cleanups (old_chain); | |
720 | ||
721 | return ret; | |
722 | } | |
723 | ||
724 | /* "while" command support. Executes a body of statements while the | |
725 | loop condition is nonzero. */ | |
726 | ||
727 | static void | |
728 | while_command (arg, from_tty) | |
729 | char *arg; | |
730 | int from_tty; | |
731 | { | |
732 | struct command_line *command = NULL; | |
733 | ||
734 | control_level = 1; | |
735 | command = get_command_line (while_control, arg); | |
736 | ||
737 | if (command == NULL) | |
738 | return; | |
739 | ||
740 | execute_control_command (command); | |
741 | free_command_lines (&command); | |
742 | } | |
743 | ||
744 | /* "if" command support. Execute either the true or false arm depending | |
745 | on the value of the if conditional. */ | |
746 | ||
747 | static void | |
748 | if_command (arg, from_tty) | |
749 | char *arg; | |
750 | int from_tty; | |
751 | { | |
752 | struct command_line *command = NULL; | |
753 | ||
754 | control_level = 1; | |
755 | command = get_command_line (if_control, arg); | |
756 | ||
757 | if (command == NULL) | |
758 | return; | |
759 | ||
760 | execute_control_command (command); | |
761 | free_command_lines (&command); | |
762 | } | |
763 | ||
172559ec JK |
764 | void |
765 | execute_user_command (c, args) | |
766 | struct cmd_list_element *c; | |
767 | char *args; | |
768 | { | |
769 | register struct command_line *cmdlines; | |
770 | struct cleanup *old_chain; | |
e52bfe0c JL |
771 | enum command_control_type ret; |
772 | ||
172559ec JK |
773 | if (args) |
774 | error ("User-defined commands cannot take arguments."); | |
775 | ||
776 | cmdlines = c->user_commands; | |
777 | if (cmdlines == 0) | |
778 | /* Null command */ | |
779 | return; | |
780 | ||
781 | /* Set the instream to 0, indicating execution of a | |
782 | user-defined function. */ | |
783 | old_chain = make_cleanup (source_cleanup, instream); | |
784 | instream = (FILE *) 0; | |
785 | while (cmdlines) | |
786 | { | |
e52bfe0c JL |
787 | ret = execute_control_command (cmdlines); |
788 | if (ret != simple_control && ret != break_control) | |
789 | { | |
790 | warning ("Error in control structure.\n"); | |
791 | break; | |
792 | } | |
172559ec JK |
793 | cmdlines = cmdlines->next; |
794 | } | |
795 | do_cleanups (old_chain); | |
796 | } | |
797 | ||
798 | /* Execute the line P as a command. | |
799 | Pass FROM_TTY as second argument to the defining function. */ | |
800 | ||
801 | void | |
802 | execute_command (p, from_tty) | |
803 | char *p; | |
804 | int from_tty; | |
805 | { | |
806 | register struct cmd_list_element *c; | |
807 | register enum language flang; | |
808 | static int warned = 0; | |
809 | ||
810 | free_all_values (); | |
811 | ||
812 | /* This can happen when command_line_input hits end of file. */ | |
813 | if (p == NULL) | |
814 | return; | |
e52bfe0c | 815 | |
172559ec JK |
816 | while (*p == ' ' || *p == '\t') p++; |
817 | if (*p) | |
818 | { | |
819 | char *arg; | |
e52bfe0c | 820 | |
172559ec JK |
821 | c = lookup_cmd (&p, cmdlist, "", 0, 1); |
822 | /* Pass null arg rather than an empty one. */ | |
823 | arg = *p ? p : 0; | |
824 | ||
825 | /* If this command has been hooked, run the hook first. */ | |
826 | if (c->hook) | |
827 | execute_user_command (c->hook, (char *)0); | |
828 | ||
829 | if (c->class == class_user) | |
830 | execute_user_command (c, arg); | |
831 | else if (c->type == set_cmd || c->type == show_cmd) | |
832 | do_setshow_command (arg, from_tty & caution, c); | |
833 | else if (c->function.cfunc == NO_FUNCTION) | |
834 | error ("That is not a command, just a help topic."); | |
835 | else | |
836 | (*c->function.cfunc) (arg, from_tty & caution); | |
837 | } | |
838 | ||
839 | /* Tell the user if the language has changed (except first time). */ | |
840 | if (current_language != expected_language) | |
841 | { | |
842 | if (language_mode == language_mode_auto) { | |
843 | language_info (1); /* Print what changed. */ | |
844 | } | |
845 | warned = 0; | |
846 | } | |
847 | ||
848 | /* Warn the user if the working language does not match the | |
849 | language of the current frame. Only warn the user if we are | |
850 | actually running the program, i.e. there is a stack. */ | |
851 | /* FIXME: This should be cacheing the frame and only running when | |
852 | the frame changes. */ | |
853 | if (target_has_stack) | |
854 | { | |
855 | flang = get_frame_language (); | |
856 | if (!warned | |
857 | && flang != language_unknown | |
858 | && flang != current_language->la_language) | |
859 | { | |
860 | printf_filtered ("%s\n", lang_frame_mismatch_warn); | |
861 | warned = 1; | |
862 | } | |
863 | } | |
864 | } | |
865 | ||
866 | /* ARGSUSED */ | |
867 | static void | |
868 | command_loop_marker (foo) | |
869 | int foo; | |
870 | { | |
871 | } | |
872 | ||
873 | /* Read commands from `instream' and execute them | |
874 | until end of file or error reading instream. */ | |
875 | void | |
876 | command_loop () | |
877 | { | |
878 | struct cleanup *old_chain; | |
879 | char *command; | |
880 | int stdin_is_tty = ISATTY (stdin); | |
881 | ||
882 | while (!feof (instream)) | |
883 | { | |
884 | if (window_hook && instream == stdin) | |
885 | (*window_hook) (instream, prompt); | |
886 | ||
887 | quit_flag = 0; | |
888 | if (instream == stdin && stdin_is_tty) | |
889 | reinitialize_more_filter (); | |
890 | old_chain = make_cleanup (command_loop_marker, 0); | |
891 | command = command_line_input (instream == stdin ? prompt : (char *) NULL, | |
892 | instream == stdin, "prompt"); | |
893 | if (command == 0) | |
894 | return; | |
895 | execute_command (command, instream == stdin); | |
896 | /* Do any commands attached to breakpoint we stopped at. */ | |
897 | bpstat_do_actions (&stop_bpstat); | |
898 | do_cleanups (old_chain); | |
899 | } | |
900 | } | |
901 | \f | |
902 | /* Commands call this if they do not want to be repeated by null lines. */ | |
903 | ||
904 | void | |
905 | dont_repeat () | |
906 | { | |
907 | if (server_command) | |
908 | return; | |
909 | ||
910 | /* If we aren't reading from standard input, we are saving the last | |
911 | thing read from stdin in line and don't want to delete it. Null lines | |
912 | won't repeat here in any case. */ | |
913 | if (instream == stdin) | |
914 | *line = 0; | |
915 | } | |
916 | \f | |
917 | /* Read a line from the stream "instream" without command line editing. | |
918 | ||
919 | It prints PRROMPT once at the start. | |
e52bfe0c | 920 | Action is compatible with "readline", e.g. space for the result is |
172559ec JK |
921 | malloc'd and should be freed by the caller. |
922 | ||
923 | A NULL return means end of file. */ | |
924 | char * | |
925 | gdb_readline (prrompt) | |
926 | char *prrompt; | |
927 | { | |
928 | int c; | |
929 | char *result; | |
930 | int input_index = 0; | |
931 | int result_size = 80; | |
932 | ||
933 | if (prrompt) | |
934 | { | |
935 | /* Don't use a _filtered function here. It causes the assumed | |
936 | character position to be off, since the newline we read from | |
937 | the user is not accounted for. */ | |
938 | fputs_unfiltered (prrompt, gdb_stdout); | |
939 | /* start-sanitize-mpw */ | |
940 | #ifdef MPW | |
941 | /* Move to a new line so the entered line doesn't have a prompt | |
942 | on the front of it. */ | |
943 | fputs_unfiltered ("\n", gdb_stdout); | |
944 | #endif /* MPW */ | |
945 | /* end-sanitize-mpw */ | |
946 | gdb_flush (gdb_stdout); | |
947 | } | |
e52bfe0c | 948 | |
172559ec JK |
949 | result = (char *) xmalloc (result_size); |
950 | ||
951 | while (1) | |
952 | { | |
953 | /* Read from stdin if we are executing a user defined command. | |
954 | This is the right thing for prompt_for_continue, at least. */ | |
955 | c = fgetc (instream ? instream : stdin); | |
956 | ||
957 | if (c == EOF) | |
958 | { | |
959 | if (input_index > 0) | |
960 | /* The last line does not end with a newline. Return it, and | |
961 | if we are called again fgetc will still return EOF and | |
962 | we'll return NULL then. */ | |
963 | break; | |
964 | free (result); | |
965 | return NULL; | |
966 | } | |
967 | ||
968 | if (c == '\n') | |
969 | break; | |
970 | ||
971 | result[input_index++] = c; | |
972 | while (input_index >= result_size) | |
973 | { | |
974 | result_size *= 2; | |
975 | result = (char *) xrealloc (result, result_size); | |
976 | } | |
977 | } | |
978 | ||
979 | result[input_index++] = '\0'; | |
980 | return result; | |
981 | } | |
982 | ||
983 | /* Variables which control command line editing and history | |
984 | substitution. These variables are given default values at the end | |
985 | of this file. */ | |
986 | static int command_editing_p; | |
987 | static int history_expansion_p; | |
988 | static int write_history_p; | |
989 | static int history_size; | |
990 | static char *history_filename; | |
991 | ||
992 | /* readline uses the word breaks for two things: | |
993 | (1) In figuring out where to point the TEXT parameter to the | |
994 | rl_completion_entry_function. Since we don't use TEXT for much, | |
995 | it doesn't matter a lot what the word breaks are for this purpose, but | |
996 | it does affect how much stuff M-? lists. | |
997 | (2) If one of the matches contains a word break character, readline | |
998 | will quote it. That's why we switch between | |
999 | gdb_completer_word_break_characters and | |
1000 | gdb_completer_command_word_break_characters. I'm not sure when | |
1001 | we need this behavior (perhaps for funky characters in C++ symbols?). */ | |
1002 | ||
1003 | /* Variables which are necessary for fancy command line editing. */ | |
1004 | char *gdb_completer_word_break_characters = | |
1005 | " \t\n!@#$%^&*()+=|~`}{[]\"';:?/>.<,-"; | |
1006 | ||
1007 | /* When completing on command names, we remove '-' from the list of | |
1008 | word break characters, since we use it in command names. If the | |
1009 | readline library sees one in any of the current completion strings, | |
1010 | it thinks that the string needs to be quoted and automatically supplies | |
1011 | a leading quote. */ | |
1012 | char *gdb_completer_command_word_break_characters = | |
1013 | " \t\n!@#$%^&*()+=|~`}{[]\"';:?/>.<,"; | |
1014 | ||
1015 | /* Characters that can be used to quote completion strings. Note that we | |
1016 | can't include '"' because the gdb C parser treats such quoted sequences | |
1017 | as strings. */ | |
1018 | char *gdb_completer_quote_characters = | |
1019 | "'"; | |
1020 | ||
1021 | /* Functions that are used as part of the fancy command line editing. */ | |
1022 | ||
1023 | /* This can be used for functions which don't want to complete on symbols | |
1024 | but don't want to complete on anything else either. */ | |
1025 | /* ARGSUSED */ | |
1026 | char ** | |
1027 | noop_completer (text, prefix) | |
1028 | char *text; | |
1029 | char *prefix; | |
1030 | { | |
1031 | return NULL; | |
1032 | } | |
1033 | ||
1034 | /* Complete on filenames. */ | |
1035 | char ** | |
1036 | filename_completer (text, word) | |
1037 | char *text; | |
1038 | char *word; | |
1039 | { | |
1040 | /* From readline. */ | |
1041 | extern char *filename_completion_function (); | |
1042 | int subsequent_name; | |
1043 | char **return_val; | |
1044 | int return_val_used; | |
1045 | int return_val_alloced; | |
1046 | ||
1047 | return_val_used = 0; | |
1048 | /* Small for testing. */ | |
1049 | return_val_alloced = 1; | |
1050 | return_val = (char **) xmalloc (return_val_alloced * sizeof (char *)); | |
1051 | ||
1052 | subsequent_name = 0; | |
1053 | while (1) | |
1054 | { | |
1055 | char *p; | |
1056 | p = filename_completion_function (text, subsequent_name); | |
1057 | if (return_val_used >= return_val_alloced) | |
1058 | { | |
1059 | return_val_alloced *= 2; | |
1060 | return_val = | |
1061 | (char **) xrealloc (return_val, | |
1062 | return_val_alloced * sizeof (char *)); | |
1063 | } | |
1064 | if (p == NULL) | |
1065 | { | |
1066 | return_val[return_val_used++] = p; | |
1067 | break; | |
1068 | } | |
1069 | /* Like emacs, don't complete on old versions. Especially useful | |
1070 | in the "source" command. */ | |
1071 | if (p[strlen (p) - 1] == '~') | |
1072 | continue; | |
1073 | ||
1074 | { | |
1075 | char *q; | |
1076 | if (word == text) | |
1077 | /* Return exactly p. */ | |
1078 | return_val[return_val_used++] = p; | |
1079 | else if (word > text) | |
1080 | { | |
1081 | /* Return some portion of p. */ | |
1082 | q = xmalloc (strlen (p) + 5); | |
1083 | strcpy (q, p + (word - text)); | |
1084 | return_val[return_val_used++] = q; | |
1085 | free (p); | |
1086 | } | |
1087 | else | |
1088 | { | |
1089 | /* Return some of TEXT plus p. */ | |
1090 | q = xmalloc (strlen (p) + (text - word) + 5); | |
1091 | strncpy (q, word, text - word); | |
1092 | q[text - word] = '\0'; | |
1093 | strcat (q, p); | |
1094 | return_val[return_val_used++] = q; | |
1095 | free (p); | |
1096 | } | |
1097 | } | |
1098 | subsequent_name = 1; | |
1099 | } | |
1100 | #if 0 | |
1101 | /* There is no way to do this just long enough to affect quote inserting | |
1102 | without also affecting the next completion. This should be fixed in | |
1103 | readline. FIXME. */ | |
1104 | /* Insure that readline does the right thing | |
1105 | with respect to inserting quotes. */ | |
1106 | rl_completer_word_break_characters = ""; | |
1107 | #endif | |
1108 | return return_val; | |
1109 | } | |
1110 | ||
1111 | /* Here are some useful test cases for completion. FIXME: These should | |
1112 | be put in the test suite. They should be tested with both M-? and TAB. | |
1113 | ||
1114 | "show output-" "radix" | |
1115 | "show output" "-radix" | |
1116 | "p" ambiguous (commands starting with p--path, print, printf, etc.) | |
1117 | "p " ambiguous (all symbols) | |
1118 | "info t foo" no completions | |
1119 | "info t " no completions | |
1120 | "info t" ambiguous ("info target", "info terminal", etc.) | |
1121 | "info ajksdlfk" no completions | |
1122 | "info ajksdlfk " no completions | |
1123 | "info" " " | |
1124 | "info " ambiguous (all info commands) | |
1125 | "p \"a" no completions (string constant) | |
1126 | "p 'a" ambiguous (all symbols starting with a) | |
1127 | "p b-a" ambiguous (all symbols starting with a) | |
1128 | "p b-" ambiguous (all symbols) | |
1129 | "file Make" "file" (word break hard to screw up here) | |
1130 | "file ../gdb.stabs/we" "ird" (needs to not break word at slash) | |
1131 | */ | |
1132 | ||
1133 | /* Generate completions one by one for the completer. Each time we are | |
1134 | called return another potential completion to the caller. The function | |
1135 | is misnamed; it just completes on commands or passes the buck to the | |
1136 | command's completer function; the stuff specific to symbol completion | |
1137 | is in make_symbol_completion_list. | |
1138 | ||
1139 | TEXT is readline's idea of the "word" we are looking at; we don't really | |
1140 | like readline's ideas about word breaking so we ignore it. | |
1141 | ||
1142 | MATCHES is the number of matches that have currently been collected from | |
1143 | calling this completion function. When zero, then we need to initialize, | |
1144 | otherwise the initialization has already taken place and we can just | |
1145 | return the next potential completion string. | |
1146 | ||
1147 | Returns NULL if there are no more completions, else a pointer to a string | |
1148 | which is a possible completion. | |
1149 | ||
1150 | RL_LINE_BUFFER is available to be looked at; it contains the entire text | |
1151 | of the line. RL_POINT is the offset in that line of the cursor. You | |
1152 | should pretend that the line ends at RL_POINT. */ | |
1153 | ||
1154 | static char * | |
1155 | symbol_completion_function (text, matches) | |
1156 | char *text; | |
1157 | int matches; | |
1158 | { | |
1159 | static char **list = (char **)NULL; /* Cache of completions */ | |
1160 | static int index; /* Next cached completion */ | |
1161 | char *output = NULL; | |
1162 | char *tmp_command, *p; | |
1163 | /* Pointer within tmp_command which corresponds to text. */ | |
1164 | char *word; | |
1165 | struct cmd_list_element *c, *result_list; | |
1166 | ||
1167 | if (matches == 0) | |
1168 | { | |
1169 | /* The caller is beginning to accumulate a new set of completions, so | |
1170 | we need to find all of them now, and cache them for returning one at | |
1171 | a time on future calls. */ | |
1172 | ||
1173 | if (list) | |
1174 | { | |
1175 | /* Free the storage used by LIST, but not by the strings inside. | |
1176 | This is because rl_complete_internal () frees the strings. */ | |
1177 | free ((PTR)list); | |
1178 | } | |
1179 | list = 0; | |
1180 | index = 0; | |
1181 | ||
1182 | /* Choose the default set of word break characters to break completions. | |
1183 | If we later find out that we are doing completions on command strings | |
1184 | (as opposed to strings supplied by the individual command completer | |
1185 | functions, which can be any string) then we will switch to the | |
1186 | special word break set for command strings, which leaves out the | |
1187 | '-' character used in some commands. */ | |
1188 | ||
1189 | rl_completer_word_break_characters = | |
1190 | gdb_completer_word_break_characters; | |
1191 | ||
1192 | /* Decide whether to complete on a list of gdb commands or on symbols. */ | |
1193 | tmp_command = (char *) alloca (rl_point + 1); | |
1194 | p = tmp_command; | |
1195 | ||
1196 | strncpy (tmp_command, rl_line_buffer, rl_point); | |
1197 | tmp_command[rl_point] = '\0'; | |
1198 | /* Since text always contains some number of characters leading up | |
1199 | to rl_point, we can find the equivalent position in tmp_command | |
1200 | by subtracting that many characters from the end of tmp_command. */ | |
1201 | word = tmp_command + rl_point - strlen (text); | |
1202 | ||
1203 | if (rl_point == 0) | |
1204 | { | |
1205 | /* An empty line we want to consider ambiguous; that is, it | |
1206 | could be any command. */ | |
1207 | c = (struct cmd_list_element *) -1; | |
1208 | result_list = 0; | |
1209 | } | |
1210 | else | |
1211 | { | |
1212 | c = lookup_cmd_1 (&p, cmdlist, &result_list, 1); | |
1213 | } | |
1214 | ||
1215 | /* Move p up to the next interesting thing. */ | |
1216 | while (*p == ' ' || *p == '\t') | |
1217 | { | |
1218 | p++; | |
1219 | } | |
1220 | ||
1221 | if (!c) | |
1222 | { | |
1223 | /* It is an unrecognized command. So there are no | |
1224 | possible completions. */ | |
1225 | list = NULL; | |
1226 | } | |
1227 | else if (c == (struct cmd_list_element *) -1) | |
1228 | { | |
1229 | char *q; | |
1230 | ||
1231 | /* lookup_cmd_1 advances p up to the first ambiguous thing, but | |
1232 | doesn't advance over that thing itself. Do so now. */ | |
1233 | q = p; | |
1234 | while (*q && (isalnum (*q) || *q == '-' || *q == '_')) | |
1235 | ++q; | |
1236 | if (q != tmp_command + rl_point) | |
1237 | { | |
1238 | /* There is something beyond the ambiguous | |
1239 | command, so there are no possible completions. For | |
1240 | example, "info t " or "info t foo" does not complete | |
1241 | to anything, because "info t" can be "info target" or | |
1242 | "info terminal". */ | |
1243 | list = NULL; | |
1244 | } | |
1245 | else | |
1246 | { | |
1247 | /* We're trying to complete on the command which was ambiguous. | |
1248 | This we can deal with. */ | |
1249 | if (result_list) | |
1250 | { | |
1251 | list = complete_on_cmdlist (*result_list->prefixlist, p, | |
1252 | word); | |
1253 | } | |
1254 | else | |
1255 | { | |
1256 | list = complete_on_cmdlist (cmdlist, p, word); | |
1257 | } | |
1258 | /* Insure that readline does the right thing with respect to | |
1259 | inserting quotes. */ | |
1260 | rl_completer_word_break_characters = | |
1261 | gdb_completer_command_word_break_characters; | |
1262 | } | |
1263 | } | |
1264 | else | |
1265 | { | |
1266 | /* We've recognized a full command. */ | |
1267 | ||
1268 | if (p == tmp_command + rl_point) | |
1269 | { | |
1270 | /* There is no non-whitespace in the line beyond the command. */ | |
1271 | ||
1272 | if (p[-1] == ' ' || p[-1] == '\t') | |
1273 | { | |
1274 | /* The command is followed by whitespace; we need to complete | |
1275 | on whatever comes after command. */ | |
1276 | if (c->prefixlist) | |
1277 | { | |
1278 | /* It is a prefix command; what comes after it is | |
1279 | a subcommand (e.g. "info "). */ | |
1280 | list = complete_on_cmdlist (*c->prefixlist, p, word); | |
1281 | ||
1282 | /* Insure that readline does the right thing | |
1283 | with respect to inserting quotes. */ | |
1284 | rl_completer_word_break_characters = | |
1285 | gdb_completer_command_word_break_characters; | |
1286 | } | |
1287 | else | |
1288 | { | |
1289 | /* It is a normal command; what comes after it is | |
1290 | completed by the command's completer function. */ | |
1291 | list = (*c->completer) (p, word); | |
1292 | } | |
1293 | } | |
1294 | else | |
1295 | { | |
1296 | /* The command is not followed by whitespace; we need to | |
1297 | complete on the command itself. e.g. "p" which is a | |
1298 | command itself but also can complete to "print", "ptype" | |
1299 | etc. */ | |
1300 | char *q; | |
1301 | ||
1302 | /* Find the command we are completing on. */ | |
1303 | q = p; | |
1304 | while (q > tmp_command) | |
1305 | { | |
1306 | if (isalnum (q[-1]) || q[-1] == '-' || q[-1] == '_') | |
1307 | --q; | |
1308 | else | |
1309 | break; | |
1310 | } | |
1311 | ||
1312 | list = complete_on_cmdlist (result_list, q, word); | |
1313 | ||
1314 | /* Insure that readline does the right thing | |
1315 | with respect to inserting quotes. */ | |
1316 | rl_completer_word_break_characters = | |
1317 | gdb_completer_command_word_break_characters; | |
1318 | } | |
1319 | } | |
1320 | else | |
1321 | { | |
1322 | /* There is non-whitespace beyond the command. */ | |
1323 | ||
1324 | if (c->prefixlist && !c->allow_unknown) | |
1325 | { | |
1326 | /* It is an unrecognized subcommand of a prefix command, | |
1327 | e.g. "info adsfkdj". */ | |
1328 | list = NULL; | |
1329 | } | |
1330 | else | |
1331 | { | |
1332 | /* It is a normal command. */ | |
1333 | list = (*c->completer) (p, word); | |
1334 | } | |
1335 | } | |
1336 | } | |
1337 | } | |
1338 | ||
1339 | /* If we found a list of potential completions during initialization then | |
1340 | dole them out one at a time. The vector of completions is NULL | |
1341 | terminated, so after returning the last one, return NULL (and continue | |
1342 | to do so) each time we are called after that, until a new list is | |
1343 | available. */ | |
1344 | ||
1345 | if (list) | |
1346 | { | |
1347 | output = list[index]; | |
1348 | if (output) | |
1349 | { | |
1350 | index++; | |
1351 | } | |
1352 | } | |
1353 | ||
1354 | #if 0 | |
1355 | /* Can't do this because readline hasn't yet checked the word breaks | |
1356 | for figuring out whether to insert a quote. */ | |
1357 | if (output == NULL) | |
1358 | /* Make sure the word break characters are set back to normal for the | |
1359 | next time that readline tries to complete something. */ | |
1360 | rl_completer_word_break_characters = | |
1361 | gdb_completer_word_break_characters; | |
1362 | #endif | |
1363 | ||
1364 | return (output); | |
1365 | } | |
1366 | ||
1367 | /* Skip over a possibly quoted word (as defined by the quote characters | |
1368 | and word break characters the completer uses). Returns pointer to the | |
1369 | location after the "word". */ | |
1370 | ||
1371 | char * | |
1372 | skip_quoted (str) | |
1373 | char *str; | |
1374 | { | |
1375 | char quote_char = '\0'; | |
1376 | char *scan; | |
1377 | ||
1378 | for (scan = str; *scan != '\0'; scan++) | |
1379 | { | |
1380 | if (quote_char != '\0') | |
1381 | { | |
1382 | /* Ignore everything until the matching close quote char */ | |
1383 | if (*scan == quote_char) | |
1384 | { | |
1385 | /* Found matching close quote. */ | |
1386 | scan++; | |
1387 | break; | |
1388 | } | |
1389 | } | |
1390 | else if (strchr (gdb_completer_quote_characters, *scan)) | |
1391 | { | |
1392 | /* Found start of a quoted string. */ | |
1393 | quote_char = *scan; | |
1394 | } | |
1395 | else if (strchr (gdb_completer_word_break_characters, *scan)) | |
1396 | { | |
1397 | break; | |
1398 | } | |
1399 | } | |
1400 | return (scan); | |
1401 | } | |
1402 | ||
1403 | \f | |
1404 | #ifdef STOP_SIGNAL | |
1405 | static void | |
1406 | stop_sig (signo) | |
1407 | int signo; | |
1408 | { | |
1409 | #if STOP_SIGNAL == SIGTSTP | |
1410 | signal (SIGTSTP, SIG_DFL); | |
1411 | sigsetmask (0); | |
1412 | kill (getpid (), SIGTSTP); | |
1413 | signal (SIGTSTP, stop_sig); | |
1414 | #else | |
1415 | signal (STOP_SIGNAL, stop_sig); | |
1416 | #endif | |
1417 | printf_unfiltered ("%s", prompt); | |
1418 | gdb_flush (gdb_stdout); | |
1419 | ||
1420 | /* Forget about any previous command -- null line now will do nothing. */ | |
1421 | dont_repeat (); | |
1422 | } | |
1423 | #endif /* STOP_SIGNAL */ | |
1424 | ||
1425 | /* Initialize signal handlers. */ | |
1426 | static void | |
1427 | do_nothing (signo) | |
1428 | int signo; | |
1429 | { | |
1430 | } | |
1431 | ||
1432 | static void | |
1433 | init_signals () | |
1434 | { | |
1435 | signal (SIGINT, request_quit); | |
1436 | ||
1437 | /* If we initialize SIGQUIT to SIG_IGN, then the SIG_IGN will get | |
1438 | passed to the inferior, which we don't want. It would be | |
1439 | possible to do a "signal (SIGQUIT, SIG_DFL)" after we fork, but | |
1440 | on BSD4.3 systems using vfork, that can affect the | |
1441 | GDB process as well as the inferior (the signal handling tables | |
1442 | might be in memory, shared between the two). Since we establish | |
1443 | a handler for SIGQUIT, when we call exec it will set the signal | |
1444 | to SIG_DFL for us. */ | |
1445 | signal (SIGQUIT, do_nothing); | |
1446 | if (signal (SIGHUP, do_nothing) != SIG_IGN) | |
1447 | signal (SIGHUP, disconnect); | |
1448 | signal (SIGFPE, float_handler); | |
1449 | ||
1450 | #if defined(SIGWINCH) && defined(SIGWINCH_HANDLER) | |
1451 | signal (SIGWINCH, SIGWINCH_HANDLER); | |
1452 | #endif | |
1453 | } | |
1454 | \f | |
1455 | /* Read one line from the command input stream `instream' | |
1456 | into the local static buffer `linebuffer' (whose current length | |
1457 | is `linelength'). | |
1458 | The buffer is made bigger as necessary. | |
1459 | Returns the address of the start of the line. | |
1460 | ||
1461 | NULL is returned for end of file. | |
1462 | ||
1463 | *If* the instream == stdin & stdin is a terminal, the line read | |
1464 | is copied into the file line saver (global var char *line, | |
1465 | length linesize) so that it can be duplicated. | |
1466 | ||
1467 | This routine either uses fancy command line editing or | |
1468 | simple input as the user has requested. */ | |
1469 | ||
1470 | char * | |
1471 | command_line_input (prrompt, repeat, annotation_suffix) | |
1472 | char *prrompt; | |
1473 | int repeat; | |
1474 | char *annotation_suffix; | |
1475 | { | |
1476 | static char *linebuffer = 0; | |
1477 | static unsigned linelength = 0; | |
1478 | register char *p; | |
1479 | char *p1; | |
1480 | char *rl; | |
1481 | char *local_prompt = prrompt; | |
1482 | register int c; | |
1483 | char *nline; | |
1484 | char got_eof = 0; | |
1485 | ||
1486 | if (annotation_level > 1 && instream == stdin) | |
1487 | { | |
1488 | local_prompt = alloca ((prrompt == NULL ? 0 : strlen (prrompt)) | |
1489 | + strlen (annotation_suffix) + 40); | |
1490 | if (prrompt == NULL) | |
1491 | local_prompt[0] = '\0'; | |
1492 | else | |
1493 | strcpy (local_prompt, prrompt); | |
1494 | strcat (local_prompt, "\n\032\032"); | |
1495 | strcat (local_prompt, annotation_suffix); | |
1496 | strcat (local_prompt, "\n"); | |
1497 | } | |
1498 | ||
1499 | if (linebuffer == 0) | |
1500 | { | |
1501 | linelength = 80; | |
1502 | linebuffer = (char *) xmalloc (linelength); | |
1503 | } | |
1504 | ||
1505 | p = linebuffer; | |
1506 | ||
1507 | /* Control-C quits instantly if typed while in this loop | |
1508 | since it should not wait until the user types a newline. */ | |
1509 | immediate_quit++; | |
1510 | #ifdef STOP_SIGNAL | |
1511 | if (job_control) | |
1512 | signal (STOP_SIGNAL, stop_sig); | |
1513 | #endif | |
1514 | ||
1515 | while (1) | |
1516 | { | |
1517 | /* Make sure that all output has been output. Some machines may let | |
1518 | you get away with leaving out some of the gdb_flush, but not all. */ | |
1519 | wrap_here (""); | |
1520 | gdb_flush (gdb_stdout); | |
1521 | gdb_flush (gdb_stderr); | |
1522 | ||
1523 | if (source_file_name != NULL) | |
1524 | { | |
1525 | ++source_line_number; | |
1526 | sprintf (source_error, | |
1527 | "%s%s:%d: Error in sourced command file:\n", | |
1528 | source_pre_error, | |
1529 | source_file_name, | |
1530 | source_line_number); | |
1531 | error_pre_print = source_error; | |
1532 | } | |
1533 | ||
1534 | if (annotation_level > 1 && instream == stdin) | |
1535 | { | |
1536 | printf_unfiltered ("\n\032\032pre-"); | |
1537 | printf_unfiltered (annotation_suffix); | |
1538 | printf_unfiltered ("\n"); | |
1539 | } | |
1540 | ||
1541 | /* Don't use fancy stuff if not talking to stdin. */ | |
1542 | if (command_editing_p && instream == stdin | |
1543 | && ISATTY (instream)) | |
1544 | rl = readline (local_prompt); | |
1545 | else | |
1546 | rl = gdb_readline (local_prompt); | |
1547 | ||
1548 | if (annotation_level > 1 && instream == stdin) | |
1549 | { | |
1550 | printf_unfiltered ("\n\032\032post-"); | |
1551 | printf_unfiltered (annotation_suffix); | |
1552 | printf_unfiltered ("\n"); | |
1553 | } | |
1554 | ||
1555 | if (!rl || rl == (char *) EOF) | |
1556 | { | |
1557 | got_eof = 1; | |
1558 | break; | |
1559 | } | |
1560 | if (strlen(rl) + 1 + (p - linebuffer) > linelength) | |
1561 | { | |
1562 | linelength = strlen(rl) + 1 + (p - linebuffer); | |
1563 | nline = (char *) xrealloc (linebuffer, linelength); | |
1564 | p += nline - linebuffer; | |
1565 | linebuffer = nline; | |
1566 | } | |
1567 | p1 = rl; | |
1568 | /* Copy line. Don't copy null at end. (Leaves line alone | |
1569 | if this was just a newline) */ | |
1570 | while (*p1) | |
1571 | *p++ = *p1++; | |
1572 | ||
1573 | free (rl); /* Allocated in readline. */ | |
1574 | ||
1575 | if (p == linebuffer || *(p - 1) != '\\') | |
1576 | break; | |
1577 | ||
1578 | p--; /* Put on top of '\'. */ | |
1579 | local_prompt = (char *) 0; | |
1580 | } | |
1581 | ||
1582 | #ifdef STOP_SIGNAL | |
1583 | if (job_control) | |
1584 | signal (STOP_SIGNAL, SIG_DFL); | |
1585 | #endif | |
1586 | immediate_quit--; | |
1587 | ||
1588 | if (got_eof) | |
1589 | return NULL; | |
1590 | ||
1591 | #define SERVER_COMMAND_LENGTH 7 | |
1592 | server_command = | |
1593 | (p - linebuffer > SERVER_COMMAND_LENGTH) | |
1594 | && STREQN (linebuffer, "server ", SERVER_COMMAND_LENGTH); | |
1595 | if (server_command) | |
1596 | { | |
1597 | /* Note that we don't set `line'. Between this and the check in | |
1598 | dont_repeat, this insures that repeating will still do the | |
1599 | right thing. */ | |
1600 | *p = '\0'; | |
1601 | return linebuffer + SERVER_COMMAND_LENGTH; | |
1602 | } | |
1603 | ||
1604 | /* Do history expansion if that is wished. */ | |
1605 | if (history_expansion_p && instream == stdin | |
1606 | && ISATTY (instream)) | |
1607 | { | |
1608 | char *history_value; | |
1609 | int expanded; | |
1610 | ||
1611 | *p = '\0'; /* Insert null now. */ | |
1612 | expanded = history_expand (linebuffer, &history_value); | |
1613 | if (expanded) | |
1614 | { | |
1615 | /* Print the changes. */ | |
1616 | printf_unfiltered ("%s\n", history_value); | |
1617 | ||
1618 | /* If there was an error, call this function again. */ | |
1619 | if (expanded < 0) | |
1620 | { | |
1621 | free (history_value); | |
1622 | return command_line_input (prrompt, repeat, annotation_suffix); | |
1623 | } | |
1624 | if (strlen (history_value) > linelength) | |
1625 | { | |
1626 | linelength = strlen (history_value) + 1; | |
1627 | linebuffer = (char *) xrealloc (linebuffer, linelength); | |
1628 | } | |
1629 | strcpy (linebuffer, history_value); | |
1630 | p = linebuffer + strlen(linebuffer); | |
1631 | free (history_value); | |
1632 | } | |
1633 | } | |
1634 | ||
1635 | /* If we just got an empty line, and that is supposed | |
1636 | to repeat the previous command, return the value in the | |
1637 | global buffer. */ | |
1638 | if (repeat) | |
1639 | { | |
1640 | if (p == linebuffer) | |
1641 | return line; | |
1642 | p1 = linebuffer; | |
1643 | while (*p1 == ' ' || *p1 == '\t') | |
1644 | p1++; | |
1645 | if (!*p1) | |
1646 | return line; | |
1647 | } | |
1648 | ||
1649 | *p = 0; | |
1650 | ||
1651 | /* Add line to history if appropriate. */ | |
1652 | if (instream == stdin | |
1653 | && ISATTY (stdin) && *linebuffer) | |
1654 | add_history (linebuffer); | |
1655 | ||
1656 | /* Note: lines consisting solely of comments are added to the command | |
1657 | history. This is useful when you type a command, and then | |
1658 | realize you don't want to execute it quite yet. You can comment | |
1659 | out the command and then later fetch it from the value history | |
1660 | and remove the '#'. The kill ring is probably better, but some | |
1661 | people are in the habit of commenting things out. */ | |
1662 | p1 = linebuffer; | |
1663 | while ((c = *p1++) != '\0') | |
1664 | { | |
1665 | if (c == '"') | |
1666 | while ((c = *p1++) != '"') | |
1667 | { | |
1668 | /* Make sure an escaped '"' doesn't make us think the string | |
1669 | is ended. */ | |
1670 | if (c == '\\') | |
1671 | parse_escape (&p1); | |
1672 | if (c == '\0') | |
1673 | break; | |
1674 | } | |
1675 | else if (c == '\'') | |
1676 | while ((c = *p1++) != '\'') | |
1677 | { | |
1678 | /* Make sure an escaped '\'' doesn't make us think the string | |
1679 | is ended. */ | |
1680 | if (c == '\\') | |
1681 | parse_escape (&p1); | |
1682 | if (c == '\0') | |
1683 | break; | |
1684 | } | |
1685 | else if (c == '#') | |
1686 | { | |
1687 | /* Found a comment. */ | |
1688 | p1[-1] = '\0'; | |
1689 | break; | |
1690 | } | |
1691 | } | |
1692 | ||
1693 | /* Save into global buffer if appropriate. */ | |
1694 | if (repeat) | |
1695 | { | |
1696 | if (linelength > linesize) | |
1697 | { | |
1698 | line = xrealloc (line, linelength); | |
1699 | linesize = linelength; | |
1700 | } | |
1701 | strcpy (line, linebuffer); | |
1702 | return line; | |
1703 | } | |
1704 | ||
1705 | return linebuffer; | |
1706 | } | |
1707 | \f | |
e52bfe0c JL |
1708 | |
1709 | /* Expand the body_list of COMMAND so that it can hold NEW_LENGTH | |
1710 | code bodies. This is typically used when we encounter an "else" | |
1711 | clause for an "if" command. */ | |
1712 | ||
1713 | static void | |
1714 | realloc_body_list (command, new_length) | |
1715 | struct command_line *command; | |
1716 | int new_length; | |
1717 | { | |
1718 | int n; | |
1719 | struct command_line **body_list; | |
1720 | ||
1721 | n = command->body_count; | |
1722 | ||
1723 | /* Nothing to do? */ | |
1724 | if (new_length <= n) | |
1725 | return; | |
1726 | ||
1727 | body_list = (struct command_line **) | |
1728 | xmalloc (sizeof (struct command_line *) * new_length); | |
1729 | ||
1730 | memcpy (body_list, command->body_list, sizeof (struct command_line *) * n); | |
1731 | ||
1732 | free (command->body_list); | |
1733 | command->body_list = body_list; | |
1734 | command->body_count = new_length; | |
1735 | } | |
1736 | ||
1737 | /* Read one line from the input stream. If the command is an "else" or | |
1738 | "end", return such an indication to the caller. */ | |
1739 | ||
1740 | static enum misc_command_type | |
1741 | read_next_line (command) | |
1742 | struct command_line **command; | |
1743 | { | |
1744 | char *p, *p1, *prompt_ptr, control_prompt[256]; | |
1745 | int i = 0; | |
1746 | ||
1747 | if (control_level >= 254) | |
1748 | error ("Control nesting too deep!\n"); | |
1749 | ||
1750 | /* Set a prompt based on the nesting of the control commands. */ | |
1751 | if (instream == stdin) | |
1752 | { | |
1753 | for (i = 0; i < control_level; i++) | |
1754 | control_prompt[i] = ' '; | |
1755 | control_prompt[i] = '>'; | |
1756 | control_prompt[i+1] = '\0'; | |
1757 | prompt_ptr = (char *)&control_prompt[0]; | |
1758 | } | |
1759 | else | |
1760 | prompt_ptr = NULL; | |
1761 | ||
1762 | p = command_line_input (prompt_ptr, instream == stdin, NULL); | |
1763 | ||
1764 | /* Not sure what to do here. */ | |
1765 | if (p == NULL) | |
1766 | return end_command; | |
1767 | ||
1768 | /* Strip leading and trailing whitespace. */ | |
1769 | while (*p == ' ' || *p == '\t') | |
1770 | p++; | |
1771 | ||
1772 | p1 = p + strlen (p); | |
1773 | while (p1 != p && (p1[-1] == ' ' || p1[-1] == '\t')) | |
1774 | p1--; | |
1775 | ||
1776 | /* Blanks and comments don't really do anything, but we need to | |
1777 | distinguish them from else, end and other commands which can be | |
1778 | executed. */ | |
1779 | if (p1 == p || p[0] == '#') | |
1780 | return nop_command; | |
1781 | ||
1782 | /* Is this the end of a simple, while, or if control structure? */ | |
1783 | if (p1 - p == 3 && !strncmp (p, "end", 3)) | |
1784 | return end_command; | |
1785 | ||
1786 | /* Is the else clause of an if control structure? */ | |
1787 | if (p1 - p == 4 && !strncmp (p, "else", 4)) | |
1788 | return else_command; | |
1789 | ||
1790 | /* Check for while, if, break, continue, etc and build a new command | |
1791 | line structure for them. */ | |
1792 | if (p1 - p > 5 && !strncmp (p, "while", 5)) | |
1793 | *command = build_command_line (while_control, p + 6); | |
1794 | else if (p1 - p > 2 && !strncmp (p, "if", 2)) | |
1795 | *command = build_command_line (if_control, p + 3); | |
1796 | else if (p1 - p == 5 && !strncmp (p, "loop_break", 5)) | |
1797 | { | |
1798 | *command = (struct command_line *) | |
1799 | xmalloc (sizeof (struct command_line)); | |
1800 | (*command)->next = NULL; | |
1801 | (*command)->line = NULL; | |
1802 | (*command)->control_type = break_control; | |
1803 | (*command)->body_count = 0; | |
1804 | (*command)->body_list = NULL; | |
1805 | } | |
1806 | else if (p1 - p == 8 && !strncmp (p, "loop_continue", 8)) | |
1807 | { | |
1808 | *command = (struct command_line *) | |
1809 | xmalloc (sizeof (struct command_line)); | |
1810 | (*command)->next = NULL; | |
1811 | (*command)->line = NULL; | |
1812 | (*command)->control_type = continue_control; | |
1813 | (*command)->body_count = 0; | |
1814 | (*command)->body_list = NULL; | |
1815 | } | |
1816 | else | |
1817 | { | |
1818 | /* A normal command. */ | |
1819 | *command = (struct command_line *) | |
1820 | xmalloc (sizeof (struct command_line)); | |
1821 | (*command)->next = NULL; | |
1822 | (*command)->line = savestring (p, p1 - p); | |
1823 | (*command)->control_type = simple_control; | |
1824 | (*command)->body_count = 0; | |
1825 | (*command)->body_list = NULL; | |
1826 | } | |
1827 | ||
1828 | /* Nothing special. */ | |
1829 | return ok_command; | |
1830 | } | |
1831 | ||
1832 | /* Recursively read in the control structures and create a command_line | |
1833 | tructure from them. | |
1834 | ||
1835 | The parent_control parameter is the control structure in which the | |
1836 | following commands are nested. */ | |
1837 | ||
1838 | static enum command_control_type | |
1839 | recurse_read_control_structure (current_cmd) | |
1840 | struct command_line *current_cmd; | |
1841 | { | |
1842 | int current_body, i; | |
1843 | enum misc_command_type val; | |
1844 | enum command_control_type ret; | |
1845 | struct command_line **body_ptr, *child_tail, *next; | |
1846 | struct cleanup *old_chains, *tmp_chains; | |
1847 | ||
1848 | old_chains = NULL; | |
1849 | child_tail = NULL; | |
1850 | current_body = 1; | |
1851 | ||
1852 | /* Sanity checks. */ | |
1853 | if (current_cmd->control_type == simple_control) | |
1854 | { | |
1855 | error ("Recursed on a simple control type\n"); | |
1856 | return invalid_control; | |
1857 | } | |
1858 | ||
1859 | if (current_body > current_cmd->body_count) | |
1860 | { | |
1861 | error ("Allocated body is smaller than this command type needs\n"); | |
1862 | return invalid_control; | |
1863 | } | |
1864 | ||
1865 | /* Read lines from the input stream and build control structures. */ | |
1866 | while (1) | |
1867 | { | |
1868 | dont_repeat (); | |
1869 | ||
1870 | next = NULL; | |
1871 | val = read_next_line (&next); | |
1872 | ||
1873 | /* Just skip blanks and comments. */ | |
1874 | if (val == nop_command) | |
1875 | continue; | |
1876 | ||
1877 | if (val == end_command) | |
1878 | { | |
1879 | if (current_cmd->control_type == while_control | |
1880 | || current_cmd->control_type == if_control) | |
1881 | { | |
1882 | /* Success reading an entire control structure. */ | |
1883 | ret = simple_control; | |
1884 | break; | |
1885 | } | |
1886 | else | |
1887 | { | |
1888 | ret = invalid_control; | |
1889 | break; | |
1890 | } | |
1891 | } | |
1892 | ||
1893 | /* Not the end of a control structure. */ | |
1894 | if (val == else_command) | |
1895 | { | |
1896 | if (current_cmd->control_type == if_control | |
1897 | && current_body == 1) | |
1898 | { | |
1899 | realloc_body_list (current_cmd, 2); | |
1900 | current_body = 2; | |
1901 | child_tail = NULL; | |
1902 | continue; | |
1903 | } | |
1904 | else | |
1905 | { | |
1906 | ret = invalid_control; | |
1907 | break; | |
1908 | } | |
1909 | } | |
1910 | ||
1911 | if (child_tail) | |
1912 | { | |
1913 | child_tail->next = next; | |
1914 | } | |
1915 | else | |
1916 | { | |
1917 | /* We have just read the first line of the child's control | |
1918 | structure. From now on, arrange to throw away the line | |
1919 | we have if we quit or get an error. */ | |
1920 | body_ptr = current_cmd->body_list; | |
1921 | for (i = 1; i < current_body; i++) | |
1922 | body_ptr++; | |
1923 | ||
1924 | *body_ptr = next; | |
1925 | ||
1926 | tmp_chains = make_cleanup (free_command_lines, body_ptr); | |
1927 | ||
1928 | if (!old_chains) | |
1929 | old_chains = tmp_chains; | |
1930 | } | |
1931 | ||
1932 | child_tail = next; | |
1933 | ||
1934 | /* If the latest line is another control structure, then recurse | |
1935 | on it. */ | |
1936 | if (next->control_type == while_control | |
1937 | || next->control_type == if_control) | |
1938 | { | |
1939 | control_level++; | |
1940 | ret = recurse_read_control_structure (next); | |
1941 | control_level--; | |
1942 | ||
1943 | if (ret != simple_control) | |
1944 | break; | |
1945 | } | |
1946 | } | |
1947 | ||
1948 | dont_repeat (); | |
1949 | if (ret == invalid_control && old_chains) | |
1950 | do_cleanups (old_chains); | |
1951 | else if (old_chains) | |
1952 | discard_cleanups (old_chains); | |
1953 | ||
1954 | return ret; | |
1955 | } | |
1956 | ||
1957 | ||
172559ec JK |
1958 | /* Read lines from the input stream |
1959 | and accumulate them in a chain of struct command_line's | |
1960 | which is then returned. */ | |
1961 | ||
1962 | struct command_line * | |
1963 | read_command_lines () | |
1964 | { | |
e52bfe0c JL |
1965 | struct command_line *head, *tail, *next; |
1966 | struct cleanup *old_chain; | |
1967 | enum command_control_type ret; | |
1968 | enum misc_command_type val; | |
1969 | ||
1970 | head = tail = NULL; | |
1971 | old_chain = NULL; | |
172559ec JK |
1972 | |
1973 | while (1) | |
1974 | { | |
e52bfe0c | 1975 | val = read_next_line (&next); |
172559ec | 1976 | |
e52bfe0c JL |
1977 | /* Ignore blank lines or comments. */ |
1978 | if (val == nop_command) | |
1979 | continue; | |
1980 | ||
1981 | if (val == end_command) | |
1982 | { | |
1983 | ret = simple_control; | |
1984 | break; | |
1985 | } | |
1986 | ||
1987 | if (val != ok_command) | |
1988 | { | |
1989 | ret = invalid_control; | |
1990 | break; | |
1991 | } | |
1992 | ||
1993 | if (next->control_type == while_control | |
1994 | || next->control_type == if_control) | |
1995 | { | |
1996 | control_level++; | |
1997 | ret = recurse_read_control_structure (next); | |
1998 | control_level--; | |
172559ec | 1999 | |
e52bfe0c JL |
2000 | if (ret == invalid_control) |
2001 | break; | |
2002 | } | |
2003 | ||
172559ec JK |
2004 | if (tail) |
2005 | { | |
2006 | tail->next = next; | |
2007 | } | |
2008 | else | |
2009 | { | |
e52bfe0c JL |
2010 | head = next; |
2011 | old_chain = make_cleanup (free_command_lines, &head); | |
172559ec JK |
2012 | } |
2013 | tail = next; | |
2014 | } | |
2015 | ||
2016 | dont_repeat (); | |
2017 | ||
e52bfe0c JL |
2018 | if (head) |
2019 | { | |
2020 | if (ret != invalid_control) | |
2021 | { | |
2022 | discard_cleanups (old_chain); | |
2023 | return head; | |
2024 | } | |
2025 | else | |
2026 | do_cleanups (old_chain); | |
2027 | } | |
2028 | ||
2029 | return NULL; | |
172559ec JK |
2030 | } |
2031 | ||
2032 | /* Free a chain of struct command_line's. */ | |
2033 | ||
2034 | void | |
2035 | free_command_lines (lptr) | |
2036 | struct command_line **lptr; | |
2037 | { | |
2038 | register struct command_line *l = *lptr; | |
2039 | register struct command_line *next; | |
e52bfe0c JL |
2040 | struct command_line **blist; |
2041 | int i; | |
172559ec JK |
2042 | |
2043 | while (l) | |
2044 | { | |
e52bfe0c JL |
2045 | if (l->body_count > 0) |
2046 | { | |
2047 | blist = l->body_list; | |
2048 | for (i = 0; i < l->body_count; i++, blist++) | |
2049 | free_command_lines (blist); | |
2050 | } | |
172559ec JK |
2051 | next = l->next; |
2052 | free (l->line); | |
2053 | free ((PTR)l); | |
2054 | l = next; | |
2055 | } | |
2056 | } | |
2057 | \f | |
2058 | /* Add an element to the list of info subcommands. */ | |
2059 | ||
2060 | void | |
2061 | add_info (name, fun, doc) | |
2062 | char *name; | |
2063 | void (*fun) PARAMS ((char *, int)); | |
2064 | char *doc; | |
2065 | { | |
2066 | add_cmd (name, no_class, fun, doc, &infolist); | |
2067 | } | |
2068 | ||
2069 | /* Add an alias to the list of info subcommands. */ | |
2070 | ||
2071 | void | |
2072 | add_info_alias (name, oldname, abbrev_flag) | |
2073 | char *name; | |
2074 | char *oldname; | |
2075 | int abbrev_flag; | |
2076 | { | |
2077 | add_alias_cmd (name, oldname, 0, abbrev_flag, &infolist); | |
2078 | } | |
2079 | ||
2080 | /* The "info" command is defined as a prefix, with allow_unknown = 0. | |
2081 | Therefore, its own definition is called only for "info" with no args. */ | |
2082 | ||
2083 | /* ARGSUSED */ | |
2084 | static void | |
2085 | info_command (arg, from_tty) | |
2086 | char *arg; | |
2087 | int from_tty; | |
2088 | { | |
2089 | printf_unfiltered ("\"info\" must be followed by the name of an info command.\n"); | |
2090 | help_list (infolist, "info ", -1, gdb_stdout); | |
2091 | } | |
2092 | ||
2093 | /* The "complete" command is used by Emacs to implement completion. */ | |
2094 | ||
2095 | /* ARGSUSED */ | |
2096 | static void | |
2097 | complete_command (arg, from_tty) | |
2098 | char *arg; | |
2099 | int from_tty; | |
2100 | { | |
2101 | int i; | |
2102 | char *completion; | |
2103 | ||
2104 | dont_repeat (); | |
2105 | ||
2106 | if (arg == NULL) | |
2107 | { | |
2108 | rl_line_buffer[0] = '\0'; | |
2109 | rl_point = 0; | |
2110 | } | |
2111 | else | |
2112 | { | |
2113 | strcpy (rl_line_buffer, arg); | |
2114 | rl_point = strlen (arg); | |
2115 | } | |
2116 | ||
2117 | for (completion = symbol_completion_function (rl_line_buffer, i = 0); | |
2118 | completion; | |
2119 | completion = symbol_completion_function (rl_line_buffer, ++i)) | |
2120 | printf_unfiltered ("%s\n", completion); | |
2121 | } | |
2122 | ||
2123 | /* The "show" command with no arguments shows all the settings. */ | |
2124 | ||
2125 | /* ARGSUSED */ | |
2126 | static void | |
2127 | show_command (arg, from_tty) | |
2128 | char *arg; | |
2129 | int from_tty; | |
2130 | { | |
2131 | cmd_show_list (showlist, from_tty, ""); | |
2132 | } | |
2133 | \f | |
2134 | /* Add an element to the list of commands. */ | |
2135 | ||
2136 | void | |
2137 | add_com (name, class, fun, doc) | |
2138 | char *name; | |
2139 | enum command_class class; | |
2140 | void (*fun) PARAMS ((char *, int)); | |
2141 | char *doc; | |
2142 | { | |
2143 | add_cmd (name, class, fun, doc, &cmdlist); | |
2144 | } | |
2145 | ||
2146 | /* Add an alias or abbreviation command to the list of commands. */ | |
2147 | ||
2148 | void | |
2149 | add_com_alias (name, oldname, class, abbrev_flag) | |
2150 | char *name; | |
2151 | char *oldname; | |
2152 | enum command_class class; | |
2153 | int abbrev_flag; | |
2154 | { | |
2155 | add_alias_cmd (name, oldname, class, abbrev_flag, &cmdlist); | |
2156 | } | |
2157 | ||
2158 | void | |
2159 | error_no_arg (why) | |
2160 | char *why; | |
2161 | { | |
2162 | error ("Argument required (%s).", why); | |
2163 | } | |
2164 | ||
2165 | /* ARGSUSED */ | |
2166 | static void | |
2167 | help_command (command, from_tty) | |
2168 | char *command; | |
2169 | int from_tty; /* Ignored */ | |
2170 | { | |
2171 | help_cmd (command, gdb_stdout); | |
2172 | } | |
2173 | \f | |
2174 | static void | |
2175 | validate_comname (comname) | |
2176 | char *comname; | |
2177 | { | |
2178 | register char *p; | |
2179 | ||
2180 | if (comname == 0) | |
2181 | error_no_arg ("name of command to define"); | |
2182 | ||
2183 | p = comname; | |
2184 | while (*p) | |
2185 | { | |
2186 | if (!isalnum(*p) && *p != '-') | |
2187 | error ("Junk in argument list: \"%s\"", p); | |
2188 | p++; | |
2189 | } | |
2190 | } | |
2191 | ||
2192 | /* This is just a placeholder in the command data structures. */ | |
2193 | static void | |
2194 | user_defined_command (ignore, from_tty) | |
2195 | char *ignore; | |
2196 | int from_tty; | |
2197 | { | |
2198 | } | |
2199 | ||
2200 | static void | |
2201 | define_command (comname, from_tty) | |
2202 | char *comname; | |
2203 | int from_tty; | |
2204 | { | |
2205 | register struct command_line *cmds; | |
2206 | register struct cmd_list_element *c, *newc, *hookc = 0; | |
2207 | char *tem = comname; | |
2208 | #define HOOK_STRING "hook-" | |
2209 | #define HOOK_LEN 5 | |
2210 | ||
2211 | validate_comname (comname); | |
2212 | ||
2213 | /* Look it up, and verify that we got an exact match. */ | |
2214 | c = lookup_cmd (&tem, cmdlist, "", -1, 1); | |
2215 | if (c && !STREQ (comname, c->name)) | |
2216 | c = 0; | |
e52bfe0c | 2217 | |
172559ec JK |
2218 | if (c) |
2219 | { | |
2220 | if (c->class == class_user || c->class == class_alias) | |
2221 | tem = "Redefine command \"%s\"? "; | |
2222 | else | |
2223 | tem = "Really redefine built-in command \"%s\"? "; | |
2224 | if (!query (tem, c->name)) | |
2225 | error ("Command \"%s\" not redefined.", c->name); | |
2226 | } | |
2227 | ||
2228 | /* If this new command is a hook, then mark the command which it | |
2229 | is hooking. Note that we allow hooking `help' commands, so that | |
2230 | we can hook the `stop' pseudo-command. */ | |
2231 | ||
2232 | if (!strncmp (comname, HOOK_STRING, HOOK_LEN)) | |
2233 | { | |
2234 | /* Look up cmd it hooks, and verify that we got an exact match. */ | |
2235 | tem = comname+HOOK_LEN; | |
2236 | hookc = lookup_cmd (&tem, cmdlist, "", -1, 0); | |
2237 | if (hookc && !STREQ (comname+HOOK_LEN, hookc->name)) | |
2238 | hookc = 0; | |
2239 | if (!hookc) | |
2240 | { | |
2241 | warning ("Your new `%s' command does not hook any existing command.", | |
2242 | comname); | |
2243 | if (!query ("Proceed? ", (char *)0)) | |
2244 | error ("Not confirmed."); | |
2245 | } | |
2246 | } | |
2247 | ||
2248 | comname = savestring (comname, strlen (comname)); | |
2249 | ||
e52bfe0c | 2250 | /* If the rest of the commands will be case insensitive, this one |
172559ec JK |
2251 | should behave in the same manner. */ |
2252 | for (tem = comname; *tem; tem++) | |
2253 | if (isupper(*tem)) *tem = tolower(*tem); | |
2254 | ||
2255 | if (from_tty) | |
2256 | { | |
2257 | printf_unfiltered ("Type commands for definition of \"%s\".\n\ | |
2258 | End with a line saying just \"end\".\n", comname); | |
2259 | gdb_flush (gdb_stdout); | |
2260 | } | |
2261 | ||
e52bfe0c | 2262 | control_level = 0; |
172559ec JK |
2263 | cmds = read_command_lines (); |
2264 | ||
2265 | if (c && c->class == class_user) | |
2266 | free_command_lines (&c->user_commands); | |
2267 | ||
2268 | newc = add_cmd (comname, class_user, user_defined_command, | |
2269 | (c && c->class == class_user) | |
2270 | ? c->doc : savestring ("User-defined.", 13), &cmdlist); | |
2271 | newc->user_commands = cmds; | |
2272 | ||
2273 | /* If this new command is a hook, then mark both commands as being | |
2274 | tied. */ | |
2275 | if (hookc) | |
2276 | { | |
2277 | hookc->hook = newc; /* Target gets hooked. */ | |
2278 | newc->hookee = hookc; /* We are marked as hooking target cmd. */ | |
2279 | } | |
2280 | } | |
2281 | ||
2282 | static void | |
2283 | document_command (comname, from_tty) | |
2284 | char *comname; | |
2285 | int from_tty; | |
2286 | { | |
2287 | struct command_line *doclines; | |
2288 | register struct cmd_list_element *c; | |
2289 | char *tem = comname; | |
2290 | ||
2291 | validate_comname (comname); | |
2292 | ||
2293 | c = lookup_cmd (&tem, cmdlist, "", 0, 1); | |
2294 | ||
2295 | if (c->class != class_user) | |
2296 | error ("Command \"%s\" is built-in.", comname); | |
2297 | ||
2298 | if (from_tty) | |
2299 | printf_unfiltered ("Type documentation for \"%s\".\n\ | |
2300 | End with a line saying just \"end\".\n", comname); | |
2301 | ||
2302 | doclines = read_command_lines (); | |
2303 | ||
2304 | if (c->doc) free (c->doc); | |
2305 | ||
2306 | { | |
2307 | register struct command_line *cl1; | |
2308 | register int len = 0; | |
2309 | ||
2310 | for (cl1 = doclines; cl1; cl1 = cl1->next) | |
2311 | len += strlen (cl1->line) + 1; | |
2312 | ||
2313 | c->doc = (char *) xmalloc (len + 1); | |
2314 | *c->doc = 0; | |
2315 | ||
2316 | for (cl1 = doclines; cl1; cl1 = cl1->next) | |
2317 | { | |
2318 | strcat (c->doc, cl1->line); | |
2319 | if (cl1->next) | |
2320 | strcat (c->doc, "\n"); | |
2321 | } | |
2322 | } | |
2323 | ||
2324 | free_command_lines (&doclines); | |
2325 | } | |
2326 | \f | |
2327 | void | |
2328 | print_gnu_advertisement () | |
2329 | { | |
2330 | printf_unfiltered ("\ | |
2331 | GDB is free software and you are welcome to distribute copies of it\n\ | |
2332 | under certain conditions; type \"show copying\" to see the conditions.\n\ | |
2333 | There is absolutely no warranty for GDB; type \"show warranty\" for details.\n\ | |
2334 | "); | |
2335 | } | |
2336 | ||
2337 | void | |
2338 | print_gdb_version (stream) | |
2339 | GDB_FILE *stream; | |
2340 | { | |
2341 | fprintf_filtered (stream, "\ | |
2342 | GDB %s (%s", version, host_name); | |
2343 | ||
2344 | if (!STREQ (host_name, target_name)) | |
2345 | fprintf_filtered (stream, " --target %s", target_name); | |
2346 | ||
2347 | fprintf_filtered (stream, "), "); | |
2348 | wrap_here(""); | |
2349 | fprintf_filtered (stream, "Copyright 1994 Free Software Foundation, Inc."); | |
2350 | } | |
2351 | ||
2352 | /* ARGSUSED */ | |
2353 | static void | |
2354 | show_version (args, from_tty) | |
2355 | char *args; | |
2356 | int from_tty; | |
2357 | { | |
2358 | immediate_quit++; | |
2359 | print_gnu_advertisement (); | |
2360 | print_gdb_version (gdb_stdout); | |
2361 | printf_filtered ("\n"); | |
2362 | immediate_quit--; | |
2363 | } | |
2364 | \f | |
2365 | /* xgdb calls this to reprint the usual GDB prompt. Obsolete now that xgdb | |
2366 | is obsolete. */ | |
2367 | ||
2368 | void | |
2369 | print_prompt () | |
2370 | { | |
2371 | printf_unfiltered ("%s", prompt); | |
2372 | gdb_flush (gdb_stdout); | |
2373 | } | |
2374 | \f | |
2375 | void | |
2376 | quit_command (args, from_tty) | |
2377 | char *args; | |
2378 | int from_tty; | |
2379 | { | |
2380 | if (inferior_pid != 0 && target_has_execution) | |
2381 | { | |
2382 | if (attach_flag) | |
2383 | { | |
2384 | if (query ("The program is running. Quit anyway (and detach it)? ")) | |
2385 | target_detach (args, from_tty); | |
2386 | else | |
2387 | error ("Not confirmed."); | |
2388 | } | |
2389 | else | |
2390 | { | |
2391 | if (query ("The program is running. Quit anyway (and kill it)? ")) | |
2392 | target_kill (); | |
2393 | else | |
2394 | error ("Not confirmed."); | |
2395 | } | |
2396 | } | |
2397 | /* UDI wants this, to kill the TIP. */ | |
2398 | target_close (1); | |
2399 | ||
2400 | /* Save the history information if it is appropriate to do so. */ | |
2401 | if (write_history_p && history_filename) | |
2402 | write_history (history_filename); | |
2403 | ||
2404 | exit (0); | |
2405 | } | |
2406 | ||
2407 | /* Returns whether GDB is running on a terminal and whether the user | |
2408 | desires that questions be asked of them on that terminal. */ | |
2409 | ||
2410 | int | |
2411 | input_from_terminal_p () | |
2412 | { | |
2413 | return gdb_has_a_terminal () && (instream == stdin) & caution; | |
2414 | } | |
2415 | \f | |
2416 | /* ARGSUSED */ | |
2417 | static void | |
2418 | pwd_command (args, from_tty) | |
2419 | char *args; | |
2420 | int from_tty; | |
2421 | { | |
2422 | if (args) error ("The \"pwd\" command does not take an argument: %s", args); | |
b7ec5b8d | 2423 | getcwd (gdb_dirbuf, sizeof (gdb_dirbuf)); |
172559ec | 2424 | |
b7ec5b8d | 2425 | if (!STREQ (gdb_dirbuf, current_directory)) |
172559ec | 2426 | printf_unfiltered ("Working directory %s\n (canonically %s).\n", |
b7ec5b8d | 2427 | current_directory, gdb_dirbuf); |
172559ec JK |
2428 | else |
2429 | printf_unfiltered ("Working directory %s.\n", current_directory); | |
2430 | } | |
2431 | ||
2432 | void | |
2433 | cd_command (dir, from_tty) | |
2434 | char *dir; | |
2435 | int from_tty; | |
2436 | { | |
2437 | int len; | |
2438 | /* Found something other than leading repetitions of "/..". */ | |
2439 | int found_real_path; | |
2440 | char *p; | |
2441 | ||
2442 | /* If the new directory is absolute, repeat is a no-op; if relative, | |
2443 | repeat might be useful but is more likely to be a mistake. */ | |
2444 | dont_repeat (); | |
2445 | ||
2446 | if (dir == 0) | |
2447 | error_no_arg ("new working directory"); | |
2448 | ||
2449 | dir = tilde_expand (dir); | |
2450 | make_cleanup (free, dir); | |
2451 | ||
2452 | if (chdir (dir) < 0) | |
2453 | perror_with_name (dir); | |
2454 | ||
2455 | len = strlen (dir); | |
2456 | dir = savestring (dir, len - (len > 1 && dir[len-1] == '/')); | |
2457 | if (dir[0] == '/') | |
2458 | current_directory = dir; | |
2459 | else | |
2460 | { | |
2461 | if (current_directory[0] == '/' && current_directory[1] == '\0') | |
2462 | current_directory = concat (current_directory, dir, NULL); | |
2463 | else | |
2464 | current_directory = concat (current_directory, "/", dir, NULL); | |
2465 | free (dir); | |
2466 | } | |
2467 | ||
2468 | /* Now simplify any occurrences of `.' and `..' in the pathname. */ | |
2469 | ||
2470 | found_real_path = 0; | |
2471 | for (p = current_directory; *p;) | |
2472 | { | |
2473 | if (p[0] == '/' && p[1] == '.' && (p[2] == 0 || p[2] == '/')) | |
2474 | strcpy (p, p + 2); | |
2475 | else if (p[0] == '/' && p[1] == '.' && p[2] == '.' | |
2476 | && (p[3] == 0 || p[3] == '/')) | |
2477 | { | |
2478 | if (found_real_path) | |
2479 | { | |
2480 | /* Search backwards for the directory just before the "/.." | |
2481 | and obliterate it and the "/..". */ | |
2482 | char *q = p; | |
2483 | while (q != current_directory && q[-1] != '/') | |
2484 | --q; | |
2485 | ||
2486 | if (q == current_directory) | |
2487 | /* current_directory is | |
2488 | a relative pathname ("can't happen"--leave it alone). */ | |
2489 | ++p; | |
2490 | else | |
2491 | { | |
2492 | strcpy (q - 1, p + 3); | |
2493 | p = q - 1; | |
2494 | } | |
2495 | } | |
2496 | else | |
2497 | /* We are dealing with leading repetitions of "/..", for example | |
2498 | "/../..", which is the Mach super-root. */ | |
2499 | p += 3; | |
2500 | } | |
2501 | else | |
2502 | { | |
2503 | found_real_path = 1; | |
2504 | ++p; | |
2505 | } | |
2506 | } | |
2507 | ||
2508 | forget_cached_source_info (); | |
2509 | ||
2510 | if (from_tty) | |
2511 | pwd_command ((char *) 0, 1); | |
2512 | } | |
2513 | \f | |
2514 | struct source_cleanup_lines_args { | |
2515 | int old_line; | |
2516 | char *old_file; | |
2517 | char *old_pre_error; | |
2518 | char *old_error_pre_print; | |
2519 | }; | |
2520 | ||
2521 | static void | |
2522 | source_cleanup_lines (args) | |
2523 | PTR args; | |
2524 | { | |
2525 | struct source_cleanup_lines_args *p = | |
2526 | (struct source_cleanup_lines_args *)args; | |
2527 | source_line_number = p->old_line; | |
2528 | source_file_name = p->old_file; | |
2529 | source_pre_error = p->old_pre_error; | |
2530 | error_pre_print = p->old_error_pre_print; | |
2531 | } | |
2532 | ||
2533 | /* ARGSUSED */ | |
2534 | void | |
2535 | source_command (args, from_tty) | |
2536 | char *args; | |
2537 | int from_tty; | |
2538 | { | |
2539 | FILE *stream; | |
2540 | struct cleanup *old_cleanups; | |
2541 | char *file = args; | |
2542 | struct source_cleanup_lines_args old_lines; | |
2543 | int needed_length; | |
2544 | ||
2545 | if (file == NULL) | |
2546 | { | |
2547 | error ("source command requires pathname of file to source."); | |
2548 | } | |
2549 | ||
2550 | file = tilde_expand (file); | |
2551 | old_cleanups = make_cleanup (free, file); | |
2552 | ||
2553 | stream = fopen (file, FOPEN_RT); | |
2554 | if (stream == 0) | |
2555 | perror_with_name (file); | |
2556 | ||
2557 | make_cleanup (fclose, stream); | |
2558 | ||
2559 | old_lines.old_line = source_line_number; | |
2560 | old_lines.old_file = source_file_name; | |
2561 | old_lines.old_pre_error = source_pre_error; | |
2562 | old_lines.old_error_pre_print = error_pre_print; | |
2563 | make_cleanup (source_cleanup_lines, &old_lines); | |
2564 | source_line_number = 0; | |
2565 | source_file_name = file; | |
2566 | source_pre_error = error_pre_print == NULL ? "" : error_pre_print; | |
2567 | source_pre_error = savestring (source_pre_error, strlen (source_pre_error)); | |
2568 | make_cleanup (free, source_pre_error); | |
2569 | /* This will get set every time we read a line. So it won't stay "" for | |
2570 | long. */ | |
2571 | error_pre_print = ""; | |
2572 | ||
2573 | needed_length = strlen (source_file_name) + strlen (source_pre_error) + 80; | |
2574 | if (source_error_allocated < needed_length) | |
2575 | { | |
2576 | source_error_allocated *= 2; | |
2577 | if (source_error_allocated < needed_length) | |
2578 | source_error_allocated = needed_length; | |
2579 | if (source_error == NULL) | |
2580 | source_error = xmalloc (source_error_allocated); | |
2581 | else | |
2582 | source_error = xrealloc (source_error, source_error_allocated); | |
2583 | } | |
2584 | ||
2585 | read_command_file (stream); | |
2586 | ||
2587 | do_cleanups (old_cleanups); | |
2588 | } | |
2589 | ||
2590 | /* ARGSUSED */ | |
2591 | static void | |
2592 | echo_command (text, from_tty) | |
2593 | char *text; | |
2594 | int from_tty; | |
2595 | { | |
2596 | char *p = text; | |
2597 | register int c; | |
2598 | ||
2599 | if (text) | |
2600 | while ((c = *p++) != '\0') | |
2601 | { | |
2602 | if (c == '\\') | |
2603 | { | |
2604 | /* \ at end of argument is used after spaces | |
2605 | so they won't be lost. */ | |
2606 | if (*p == 0) | |
2607 | return; | |
2608 | ||
2609 | c = parse_escape (&p); | |
2610 | if (c >= 0) | |
2611 | printf_filtered ("%c", c); | |
2612 | } | |
2613 | else | |
2614 | printf_filtered ("%c", c); | |
2615 | } | |
2616 | ||
2617 | /* Force this output to appear now. */ | |
2618 | wrap_here (""); | |
2619 | gdb_flush (gdb_stdout); | |
2620 | } | |
2621 | ||
2622 | \f | |
2623 | /* Functions to manipulate command line editing control variables. */ | |
2624 | ||
2625 | /* Number of commands to print in each call to show_commands. */ | |
2626 | #define Hist_print 10 | |
2627 | static void | |
2628 | show_commands (args, from_tty) | |
2629 | char *args; | |
2630 | int from_tty; | |
2631 | { | |
2632 | /* Index for history commands. Relative to history_base. */ | |
2633 | int offset; | |
2634 | ||
2635 | /* Number of the history entry which we are planning to display next. | |
2636 | Relative to history_base. */ | |
2637 | static int num = 0; | |
2638 | ||
2639 | /* The first command in the history which doesn't exist (i.e. one more | |
2640 | than the number of the last command). Relative to history_base. */ | |
2641 | int hist_len; | |
2642 | ||
2643 | extern HIST_ENTRY *history_get PARAMS ((int)); | |
2644 | ||
2645 | /* Print out some of the commands from the command history. */ | |
2646 | /* First determine the length of the history list. */ | |
2647 | hist_len = history_size; | |
2648 | for (offset = 0; offset < history_size; offset++) | |
2649 | { | |
2650 | if (!history_get (history_base + offset)) | |
2651 | { | |
2652 | hist_len = offset; | |
2653 | break; | |
2654 | } | |
2655 | } | |
2656 | ||
2657 | if (args) | |
2658 | { | |
2659 | if (args[0] == '+' && args[1] == '\0') | |
2660 | /* "info editing +" should print from the stored position. */ | |
2661 | ; | |
2662 | else | |
2663 | /* "info editing <exp>" should print around command number <exp>. */ | |
2664 | num = (parse_and_eval_address (args) - history_base) - Hist_print / 2; | |
2665 | } | |
2666 | /* "show commands" means print the last Hist_print commands. */ | |
2667 | else | |
2668 | { | |
2669 | num = hist_len - Hist_print; | |
2670 | } | |
2671 | ||
2672 | if (num < 0) | |
2673 | num = 0; | |
2674 | ||
2675 | /* If there are at least Hist_print commands, we want to display the last | |
2676 | Hist_print rather than, say, the last 6. */ | |
2677 | if (hist_len - num < Hist_print) | |
2678 | { | |
2679 | num = hist_len - Hist_print; | |
2680 | if (num < 0) | |
2681 | num = 0; | |
2682 | } | |
2683 | ||
2684 | for (offset = num; offset < num + Hist_print && offset < hist_len; offset++) | |
2685 | { | |
2686 | printf_filtered ("%5d %s\n", history_base + offset, | |
2687 | (history_get (history_base + offset))->line); | |
2688 | } | |
2689 | ||
2690 | /* The next command we want to display is the next one that we haven't | |
2691 | displayed yet. */ | |
2692 | num += Hist_print; | |
e52bfe0c | 2693 | |
172559ec JK |
2694 | /* If the user repeats this command with return, it should do what |
2695 | "show commands +" does. This is unnecessary if arg is null, | |
2696 | because "show commands +" is not useful after "show commands". */ | |
2697 | if (from_tty && args) | |
2698 | { | |
2699 | args[0] = '+'; | |
2700 | args[1] = '\0'; | |
2701 | } | |
2702 | } | |
2703 | ||
2704 | /* Called by do_setshow_command. */ | |
2705 | /* ARGSUSED */ | |
2706 | static void | |
2707 | set_history_size_command (args, from_tty, c) | |
2708 | char *args; | |
2709 | int from_tty; | |
2710 | struct cmd_list_element *c; | |
2711 | { | |
2712 | if (history_size == INT_MAX) | |
2713 | unstifle_history (); | |
2714 | else if (history_size >= 0) | |
2715 | stifle_history (history_size); | |
2716 | else | |
2717 | { | |
2718 | history_size = INT_MAX; | |
2719 | error ("History size must be non-negative"); | |
2720 | } | |
2721 | } | |
2722 | ||
2723 | /* ARGSUSED */ | |
2724 | static void | |
2725 | set_history (args, from_tty) | |
2726 | char *args; | |
2727 | int from_tty; | |
2728 | { | |
2729 | printf_unfiltered ("\"set history\" must be followed by the name of a history subcommand.\n"); | |
2730 | help_list (sethistlist, "set history ", -1, gdb_stdout); | |
2731 | } | |
2732 | ||
2733 | /* ARGSUSED */ | |
2734 | static void | |
2735 | show_history (args, from_tty) | |
2736 | char *args; | |
2737 | int from_tty; | |
2738 | { | |
2739 | cmd_show_list (showhistlist, from_tty, ""); | |
2740 | } | |
2741 | ||
2742 | int info_verbose = 0; /* Default verbose msgs off */ | |
2743 | ||
2744 | /* Called by do_setshow_command. An elaborate joke. */ | |
2745 | /* ARGSUSED */ | |
e52bfe0c | 2746 | static void |
172559ec JK |
2747 | set_verbose (args, from_tty, c) |
2748 | char *args; | |
2749 | int from_tty; | |
2750 | struct cmd_list_element *c; | |
2751 | { | |
2752 | char *cmdname = "verbose"; | |
2753 | struct cmd_list_element *showcmd; | |
e52bfe0c | 2754 | |
172559ec JK |
2755 | showcmd = lookup_cmd_1 (&cmdname, showlist, NULL, 1); |
2756 | ||
2757 | if (info_verbose) | |
2758 | { | |
2759 | c->doc = "Set verbose printing of informational messages."; | |
2760 | showcmd->doc = "Show verbose printing of informational messages."; | |
2761 | } | |
2762 | else | |
2763 | { | |
2764 | c->doc = "Set verbosity."; | |
2765 | showcmd->doc = "Show verbosity."; | |
2766 | } | |
2767 | } | |
2768 | ||
2769 | static void | |
2770 | float_handler (signo) | |
2771 | int signo; | |
2772 | { | |
2773 | /* This message is based on ANSI C, section 4.7. Note that integer | |
2774 | divide by zero causes this, so "float" is a misnomer. */ | |
2775 | signal (SIGFPE, float_handler); | |
2776 | error ("Erroneous arithmetic operation."); | |
2777 | } | |
2778 | ||
172559ec JK |
2779 | \f |
2780 | static void | |
2781 | init_cmd_lists () | |
2782 | { | |
2783 | cmdlist = NULL; | |
2784 | infolist = NULL; | |
2785 | enablelist = NULL; | |
2786 | disablelist = NULL; | |
2787 | deletelist = NULL; | |
2788 | enablebreaklist = NULL; | |
2789 | setlist = NULL; | |
2790 | unsetlist = NULL; | |
2791 | showlist = NULL; | |
2792 | sethistlist = NULL; | |
2793 | showhistlist = NULL; | |
2794 | unsethistlist = NULL; | |
2795 | #if MAINTENANCE_CMDS | |
2796 | maintenancelist = NULL; | |
2797 | maintenanceinfolist = NULL; | |
2798 | maintenanceprintlist = NULL; | |
2799 | #endif | |
2800 | setprintlist = NULL; | |
2801 | showprintlist = NULL; | |
2802 | setchecklist = NULL; | |
2803 | showchecklist = NULL; | |
2804 | } | |
2805 | ||
2806 | /* Init the history buffer. Note that we are called after the init file(s) | |
2807 | * have been read so that the user can change the history file via his | |
2808 | * .gdbinit file (for instance). The GDBHISTFILE environment variable | |
2809 | * overrides all of this. | |
2810 | */ | |
2811 | ||
2812 | void | |
2813 | init_history() | |
2814 | { | |
2815 | char *tmpenv; | |
2816 | ||
2817 | tmpenv = getenv ("HISTSIZE"); | |
2818 | if (tmpenv) | |
2819 | history_size = atoi (tmpenv); | |
2820 | else if (!history_size) | |
2821 | history_size = 256; | |
2822 | ||
2823 | stifle_history (history_size); | |
2824 | ||
2825 | tmpenv = getenv ("GDBHISTFILE"); | |
2826 | if (tmpenv) | |
2827 | history_filename = savestring (tmpenv, strlen(tmpenv)); | |
2828 | else if (!history_filename) { | |
2829 | /* We include the current directory so that if the user changes | |
2830 | directories the file written will be the same as the one | |
2831 | that was read. */ | |
2832 | history_filename = concat (current_directory, "/.gdb_history", NULL); | |
2833 | } | |
2834 | read_history (history_filename); | |
2835 | } | |
2836 | ||
2837 | static void | |
2838 | init_main () | |
2839 | { | |
2840 | struct cmd_list_element *c; | |
e52bfe0c | 2841 | |
172559ec JK |
2842 | #ifdef DEFAULT_PROMPT |
2843 | prompt = savestring (DEFAULT_PROMPT, strlen(DEFAULT_PROMPT)); | |
2844 | #else | |
2845 | prompt = savestring ("(gdb) ", 6); | |
2846 | #endif | |
2847 | ||
2848 | /* Set the important stuff up for command editing. */ | |
2849 | command_editing_p = 1; | |
2850 | history_expansion_p = 0; | |
2851 | write_history_p = 0; | |
e52bfe0c | 2852 | |
172559ec JK |
2853 | /* Setup important stuff for command line editing. */ |
2854 | rl_completion_entry_function = (int (*)()) symbol_completion_function; | |
2855 | rl_completer_word_break_characters = gdb_completer_word_break_characters; | |
2856 | rl_completer_quote_characters = gdb_completer_quote_characters; | |
2857 | rl_readline_name = "gdb"; | |
2858 | ||
2859 | /* Define the classes of commands. | |
2860 | They will appear in the help list in the reverse of this order. */ | |
2861 | ||
2862 | add_cmd ("internals", class_maintenance, NO_FUNCTION, | |
2863 | "Maintenance commands.\n\ | |
2864 | Some gdb commands are provided just for use by gdb maintainers.\n\ | |
2865 | These commands are subject to frequent change, and may not be as\n\ | |
2866 | well documented as user commands.", | |
2867 | &cmdlist); | |
2868 | add_cmd ("obscure", class_obscure, NO_FUNCTION, "Obscure features.", &cmdlist); | |
2869 | add_cmd ("aliases", class_alias, NO_FUNCTION, "Aliases of other commands.", &cmdlist); | |
2870 | add_cmd ("user-defined", class_user, NO_FUNCTION, "User-defined commands.\n\ | |
2871 | The commands in this class are those defined by the user.\n\ | |
2872 | Use the \"define\" command to define a command.", &cmdlist); | |
2873 | add_cmd ("support", class_support, NO_FUNCTION, "Support facilities.", &cmdlist); | |
2874 | add_cmd ("status", class_info, NO_FUNCTION, "Status inquiries.", &cmdlist); | |
2875 | add_cmd ("files", class_files, NO_FUNCTION, "Specifying and examining files.", &cmdlist); | |
2876 | add_cmd ("breakpoints", class_breakpoint, NO_FUNCTION, "Making program stop at certain points.", &cmdlist); | |
2877 | add_cmd ("data", class_vars, NO_FUNCTION, "Examining data.", &cmdlist); | |
2878 | add_cmd ("stack", class_stack, NO_FUNCTION, "Examining the stack.\n\ | |
2879 | The stack is made up of stack frames. Gdb assigns numbers to stack frames\n\ | |
2880 | counting from zero for the innermost (currently executing) frame.\n\n\ | |
2881 | At any time gdb identifies one frame as the \"selected\" frame.\n\ | |
2882 | Variable lookups are done with respect to the selected frame.\n\ | |
2883 | When the program being debugged stops, gdb selects the innermost frame.\n\ | |
2884 | The commands below can be used to select other frames by number or address.", | |
2885 | &cmdlist); | |
2886 | add_cmd ("running", class_run, NO_FUNCTION, "Running the program.", &cmdlist); | |
2887 | ||
2888 | add_com ("pwd", class_files, pwd_command, | |
2889 | "Print working directory. This is used for your program as well."); | |
2890 | c = add_cmd ("cd", class_files, cd_command, | |
2891 | "Set working directory to DIR for debugger and program being debugged.\n\ | |
2892 | The change does not take effect for the program being debugged\n\ | |
2893 | until the next time it is started.", &cmdlist); | |
2894 | c->completer = filename_completer; | |
2895 | ||
2896 | add_show_from_set | |
2897 | (add_set_cmd ("prompt", class_support, var_string, (char *)&prompt, | |
2898 | "Set gdb's prompt", | |
2899 | &setlist), | |
2900 | &showlist); | |
e52bfe0c | 2901 | |
172559ec JK |
2902 | add_com ("echo", class_support, echo_command, |
2903 | "Print a constant string. Give string as argument.\n\ | |
2904 | C escape sequences may be used in the argument.\n\ | |
2905 | No newline is added at the end of the argument;\n\ | |
2906 | use \"\\n\" if you want a newline to be printed.\n\ | |
2907 | Since leading and trailing whitespace are ignored in command arguments,\n\ | |
2908 | if you want to print some you must use \"\\\" before leading whitespace\n\ | |
2909 | to be printed or after trailing whitespace."); | |
2910 | add_com ("document", class_support, document_command, | |
2911 | "Document a user-defined command.\n\ | |
2912 | Give command name as argument. Give documentation on following lines.\n\ | |
2913 | End with a line of just \"end\"."); | |
2914 | add_com ("define", class_support, define_command, | |
2915 | "Define a new command name. Command name is argument.\n\ | |
2916 | Definition appears on following lines, one command per line.\n\ | |
2917 | End with a line of just \"end\".\n\ | |
2918 | Use the \"document\" command to give documentation for the new command.\n\ | |
2919 | Commands defined in this way do not take arguments."); | |
2920 | ||
2921 | #ifdef __STDC__ | |
2922 | c = add_cmd ("source", class_support, source_command, | |
2923 | "Read commands from a file named FILE.\n\ | |
2924 | Note that the file \"" GDBINIT_FILENAME "\" is read automatically in this way\n\ | |
2925 | when gdb is started.", &cmdlist); | |
2926 | #else | |
2927 | /* Punt file name, we can't help it easily. */ | |
2928 | c = add_cmd ("source", class_support, source_command, | |
2929 | "Read commands from a file named FILE.\n\ | |
2930 | Note that the file \".gdbinit\" is read automatically in this way\n\ | |
2931 | when gdb is started.", &cmdlist); | |
2932 | #endif | |
2933 | c->completer = filename_completer; | |
2934 | ||
2935 | add_com ("quit", class_support, quit_command, "Exit gdb."); | |
2936 | add_com ("help", class_support, help_command, "Print list of commands."); | |
2937 | add_com_alias ("q", "quit", class_support, 1); | |
2938 | add_com_alias ("h", "help", class_support, 1); | |
2939 | ||
2940 | ||
2941 | c = add_set_cmd ("verbose", class_support, var_boolean, (char *)&info_verbose, | |
2942 | "Set ", | |
2943 | &setlist), | |
2944 | add_show_from_set (c, &showlist); | |
2945 | c->function.sfunc = set_verbose; | |
2946 | set_verbose (NULL, 0, c); | |
e52bfe0c | 2947 | |
172559ec JK |
2948 | add_show_from_set |
2949 | (add_set_cmd ("editing", class_support, var_boolean, (char *)&command_editing_p, | |
2950 | "Set editing of command lines as they are typed.\n\ | |
2951 | Use \"on\" to enable to enable the editing, and \"off\" to disable it.\n\ | |
2952 | Without an argument, command line editing is enabled. To edit, use\n\ | |
2953 | EMACS-like or VI-like commands like control-P or ESC.", &setlist), | |
2954 | &showlist); | |
2955 | ||
2956 | add_prefix_cmd ("history", class_support, set_history, | |
2957 | "Generic command for setting command history parameters.", | |
2958 | &sethistlist, "set history ", 0, &setlist); | |
2959 | add_prefix_cmd ("history", class_support, show_history, | |
2960 | "Generic command for showing command history parameters.", | |
2961 | &showhistlist, "show history ", 0, &showlist); | |
2962 | ||
2963 | add_show_from_set | |
2964 | (add_set_cmd ("expansion", no_class, var_boolean, (char *)&history_expansion_p, | |
2965 | "Set history expansion on command input.\n\ | |
2966 | Without an argument, history expansion is enabled.", &sethistlist), | |
2967 | &showhistlist); | |
2968 | ||
2969 | add_show_from_set | |
2970 | (add_set_cmd ("save", no_class, var_boolean, (char *)&write_history_p, | |
2971 | "Set saving of the history record on exit.\n\ | |
2972 | Use \"on\" to enable to enable the saving, and \"off\" to disable it.\n\ | |
2973 | Without an argument, saving is enabled.", &sethistlist), | |
2974 | &showhistlist); | |
2975 | ||
2976 | c = add_set_cmd ("size", no_class, var_integer, (char *)&history_size, | |
2977 | "Set the size of the command history, \n\ | |
2978 | ie. the number of previous commands to keep a record of.", &sethistlist); | |
2979 | add_show_from_set (c, &showhistlist); | |
2980 | c->function.sfunc = set_history_size_command; | |
2981 | ||
2982 | add_show_from_set | |
2983 | (add_set_cmd ("filename", no_class, var_filename, (char *)&history_filename, | |
2984 | "Set the filename in which to record the command history\n\ | |
2985 | (the list of previous commands of which a record is kept).", &sethistlist), | |
2986 | &showhistlist); | |
2987 | ||
2988 | add_show_from_set | |
2989 | (add_set_cmd ("confirm", class_support, var_boolean, | |
2990 | (char *)&caution, | |
2991 | "Set whether to confirm potentially dangerous operations.", | |
2992 | &setlist), | |
2993 | &showlist); | |
2994 | ||
2995 | add_prefix_cmd ("info", class_info, info_command, | |
2996 | "Generic command for showing things about the program being debugged.", | |
2997 | &infolist, "info ", 0, &cmdlist); | |
2998 | add_com_alias ("i", "info", class_info, 1); | |
2999 | ||
3000 | add_com ("complete", class_obscure, complete_command, | |
3001 | "List the completions for the rest of the line as a command."); | |
3002 | ||
3003 | add_prefix_cmd ("show", class_info, show_command, | |
3004 | "Generic command for showing things about the debugger.", | |
3005 | &showlist, "show ", 0, &cmdlist); | |
3006 | /* Another way to get at the same thing. */ | |
3007 | add_info ("set", show_command, "Show all GDB settings."); | |
3008 | ||
3009 | add_cmd ("commands", no_class, show_commands, | |
3010 | "Show the the history of commands you typed.\n\ | |
3011 | You can supply a command number to start with, or a `+' to start after\n\ | |
3012 | the previous command number shown.", | |
3013 | &showlist); | |
3014 | ||
3015 | add_cmd ("version", no_class, show_version, | |
3016 | "Show what version of GDB this is.", &showlist); | |
3017 | ||
e52bfe0c JL |
3018 | add_com ("while", class_support, while_command, |
3019 | "Execute nested commands WHILE the conditional expression is non zero.\n\ | |
3020 | The conditional expression must follow the word `while' and must in turn be\ | |
3021 | followed by a new line. The nested commands must be entered one per line,\ | |
3022 | and should be terminated by the word `end'."); | |
3023 | ||
3024 | add_com ("if", class_support, if_command, | |
3025 | "Execute nested commands once IF the conditional expression is non zero.\n\ | |
3026 | The conditional expression must follow the word `if' and must in turn be\ | |
3027 | followed by a new line. The nested commands must be entered one per line,\ | |
3028 | and should be terminated by the word 'else' or `end'. If an else clause\ | |
3029 | is used, the same rules apply to its nested commands as to the first ones."); | |
3030 | ||
172559ec JK |
3031 | /* If target is open when baud changes, it doesn't take effect until the |
3032 | next open (I think, not sure). */ | |
3033 | add_show_from_set (add_set_cmd ("remotebaud", no_class, | |
3034 | var_zinteger, (char *)&baud_rate, | |
3035 | "Set baud rate for remote serial I/O.\n\ | |
3036 | This value is used to set the speed of the serial port when debugging\n\ | |
3037 | using remote targets.", &setlist), | |
3038 | &showlist); | |
3039 | ||
3040 | add_show_from_set ( | |
3041 | add_set_cmd ("remotedebug", no_class, var_zinteger, (char *)&remote_debug, | |
3042 | "Set debugging of remote protocol.\n\ | |
3043 | When enabled, each packet sent or received with the remote target\n\ | |
3044 | is displayed.", &setlist), | |
3045 | &showlist); | |
3046 | } |