Commit | Line | Data |
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7d9884b9 JG |
1 | /* Top level `main' program for GDB, the GNU debugger. |
2 | Copyright 1986, 1987, 1988, 1989, 1990, 1991 Free Software Foundation, Inc. | |
bd5635a1 RP |
3 | |
4 | This file is part of GDB. | |
5 | ||
e522fb52 | 6 | This program is free software; you can redistribute it and/or modify |
bd5635a1 | 7 | it under the terms of the GNU General Public License as published by |
e522fb52 JG |
8 | the Free Software Foundation; either version 2 of the License, or |
9 | (at your option) any later version. | |
bd5635a1 | 10 | |
e522fb52 | 11 | This program is distributed in the hope that it will be useful, |
bd5635a1 RP |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
e522fb52 JG |
17 | along with this program; if not, write to the Free Software |
18 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
bd5635a1 RP |
19 | |
20 | #include <stdio.h> | |
21 | int fclose (); | |
22 | #include "defs.h" | |
23 | #include "gdbcmd.h" | |
bd5635a1 RP |
24 | #include "symtab.h" |
25 | #include "inferior.h" | |
26 | #include "signals.h" | |
27 | #include "target.h" | |
28 | #include "breakpoint.h" | |
bd099407 | 29 | #include "language.h" |
bd5635a1 | 30 | |
e522fb52 JG |
31 | #include "getopt.h" |
32 | ||
33 | /* readline include files */ | |
34 | #include "readline.h" | |
35 | #include "history.h" | |
bd5635a1 RP |
36 | |
37 | /* readline defines this. */ | |
38 | #undef savestring | |
39 | ||
40 | #ifdef USG | |
41 | #include <sys/types.h> | |
42 | #include <unistd.h> | |
43 | #endif | |
44 | ||
45 | #include <string.h> | |
46 | #include <sys/file.h> | |
47 | #include <setjmp.h> | |
48 | #include <sys/param.h> | |
49 | #include <sys/stat.h> | |
e522fb52 | 50 | #include <ctype.h> |
bd5635a1 RP |
51 | |
52 | #ifdef SET_STACK_LIMIT_HUGE | |
53 | #include <sys/time.h> | |
54 | #include <sys/resource.h> | |
bd5635a1 RP |
55 | |
56 | int original_stack_limit; | |
57 | #endif | |
58 | ||
59 | ||
60 | /* If this definition isn't overridden by the header files, assume | |
61 | that isatty and fileno exist on this system. */ | |
62 | #ifndef ISATTY | |
63 | #define ISATTY(FP) (isatty (fileno (FP))) | |
64 | #endif | |
65 | ||
66 | /* Initialization file name for gdb. This is overridden in some configs. */ | |
67 | ||
68 | #ifndef GDBINIT_FILENAME | |
69 | #define GDBINIT_FILENAME ".gdbinit" | |
70 | #endif | |
71 | char gdbinit[] = GDBINIT_FILENAME; | |
72 | ||
f266e564 JK |
73 | #define ALL_CLEANUPS ((struct cleanup *)0) |
74 | ||
bd5635a1 RP |
75 | /* Version number of GDB, as a string. */ |
76 | ||
77 | extern char *version; | |
78 | ||
81066208 JG |
79 | /* Message to be printed before the error message, when an error occurs. */ |
80 | ||
81 | extern char *error_pre_print; | |
82 | ||
bd099407 JG |
83 | extern char lang_frame_mismatch_warn[]; /* language.c */ |
84 | ||
bd5635a1 RP |
85 | /* Flag for whether we want all the "from_tty" gubbish printed. */ |
86 | ||
87 | int caution = 1; /* Default is yes, sigh. */ | |
88 | ||
89 | /* | |
90 | * Define all cmd_list_element's | |
91 | */ | |
92 | ||
93 | /* Chain containing all defined commands. */ | |
94 | ||
95 | struct cmd_list_element *cmdlist; | |
96 | ||
97 | /* Chain containing all defined info subcommands. */ | |
98 | ||
99 | struct cmd_list_element *infolist; | |
100 | ||
101 | /* Chain containing all defined enable subcommands. */ | |
102 | ||
103 | struct cmd_list_element *enablelist; | |
104 | ||
105 | /* Chain containing all defined disable subcommands. */ | |
106 | ||
107 | struct cmd_list_element *disablelist; | |
108 | ||
109 | /* Chain containing all defined delete subcommands. */ | |
110 | ||
111 | struct cmd_list_element *deletelist; | |
112 | ||
113 | /* Chain containing all defined "enable breakpoint" subcommands. */ | |
114 | ||
115 | struct cmd_list_element *enablebreaklist; | |
116 | ||
117 | /* Chain containing all defined set subcommands */ | |
118 | ||
119 | struct cmd_list_element *setlist; | |
120 | ||
121 | /* Chain containing all defined show subcommands. */ | |
122 | struct cmd_list_element *showlist; | |
123 | ||
124 | /* Chain containing all defined \"set history\". */ | |
125 | ||
126 | struct cmd_list_element *sethistlist; | |
127 | ||
128 | /* Chain containing all defined \"show history\". */ | |
129 | struct cmd_list_element *showhistlist; | |
130 | ||
131 | /* Chain containing all defined \"unset history\". */ | |
132 | ||
133 | struct cmd_list_element *unsethistlist; | |
134 | ||
135 | /* stdio stream that command input is being read from. */ | |
136 | ||
137 | FILE *instream; | |
138 | ||
139 | /* Current working directory. */ | |
140 | ||
141 | char *current_directory; | |
142 | ||
143 | /* The directory name is actually stored here (usually). */ | |
f7402c04 | 144 | static char dirbuf[1024]; |
bd5635a1 RP |
145 | |
146 | /* Function to call before reading a command, if nonzero. | |
147 | The function receives two args: an input stream, | |
148 | and a prompt string. */ | |
bd099407 | 149 | |
bd5635a1 RP |
150 | void (*window_hook) (); |
151 | ||
152 | extern int frame_file_full_name; | |
153 | int epoch_interface; | |
154 | int xgdb_verbose; | |
155 | ||
156 | /* The external commands we call... */ | |
157 | extern void init_source_path (); | |
158 | extern void directory_command (); | |
159 | extern void exec_file_command (); | |
160 | extern void symbol_file_command (); | |
161 | extern void core_file_command (); | |
162 | extern void tty_command (); | |
163 | ||
164 | extern void help_list (); | |
165 | extern void initialize_all_files (); | |
166 | extern void init_malloc (); | |
167 | ||
168 | /* Forward declarations for this file */ | |
169 | void free_command_lines (); | |
170 | char *gdb_readline (); | |
171 | char *command_line_input (); | |
8b3c897a | 172 | static void initialize_history (); |
bd5635a1 RP |
173 | static void initialize_main (); |
174 | static void initialize_cmd_lists (); | |
175 | static void init_signals (); | |
176 | static void quit_command (); | |
177 | void command_loop (); | |
178 | static void source_command (); | |
179 | static void print_gdb_version (); | |
81066208 | 180 | static void print_gnu_advertisement (); |
bd5635a1 RP |
181 | static void float_handler (); |
182 | static void cd_command (); | |
183 | static void read_command_file (); | |
184 | ||
185 | char *getenv (); | |
186 | ||
187 | /* gdb prints this when reading a command interactively */ | |
188 | static char *prompt; | |
189 | ||
190 | /* Buffer used for reading command lines, and the size | |
191 | allocated for it so far. */ | |
192 | ||
193 | char *line; | |
194 | int linesize = 100; | |
195 | ||
196 | /* Baud rate specified for talking to serial target systems. Default | |
197 | is left as a zero pointer, so targets can choose their own defaults. */ | |
198 | ||
199 | char *baud_rate; | |
200 | ||
201 | /* Signal to catch ^Z typed while reading a command: SIGTSTP or SIGCONT. */ | |
202 | ||
203 | #ifndef STOP_SIGNAL | |
204 | #ifdef SIGTSTP | |
205 | #define STOP_SIGNAL SIGTSTP | |
206 | #endif | |
207 | #endif | |
d566d62a JK |
208 | |
209 | /* Some System V have job control but not sigsetmask(). */ | |
210 | #if !defined (HAVE_SIGSETMASK) | |
211 | #define HAVE_SIGSETMASK !defined (USG) | |
212 | #endif | |
213 | ||
8b3c897a | 214 | #if 0 == (HAVE_SIGSETMASK) |
d566d62a JK |
215 | #define sigsetmask(n) |
216 | #endif | |
bd5635a1 RP |
217 | \f |
218 | /* This is how `error' returns to command level. */ | |
219 | ||
220 | jmp_buf to_top_level; | |
221 | ||
222 | void | |
223 | return_to_top_level () | |
224 | { | |
225 | quit_flag = 0; | |
226 | immediate_quit = 0; | |
227 | bpstat_clear_actions(stop_bpstat); /* Clear queued breakpoint commands */ | |
228 | clear_momentary_breakpoints (); | |
229 | disable_current_display (); | |
f266e564 | 230 | do_cleanups (ALL_CLEANUPS); |
bd5635a1 RP |
231 | longjmp (to_top_level, 1); |
232 | } | |
233 | ||
234 | /* Call FUNC with arg ARGS, catching any errors. | |
235 | If there is no error, return the value returned by FUNC. | |
81066208 JG |
236 | If there is an error, print ERRSTRING, print the specific error message, |
237 | then return zero. */ | |
bd5635a1 RP |
238 | |
239 | int | |
240 | catch_errors (func, args, errstring) | |
241 | int (*func) (); | |
bdbd5f50 | 242 | char *args; |
bd5635a1 RP |
243 | char *errstring; |
244 | { | |
245 | jmp_buf saved; | |
246 | int val; | |
247 | struct cleanup *saved_cleanup_chain; | |
81066208 | 248 | char *saved_error_pre_print; |
bd5635a1 RP |
249 | |
250 | saved_cleanup_chain = save_cleanups (); | |
81066208 | 251 | saved_error_pre_print = error_pre_print; |
bd5635a1 RP |
252 | |
253 | bcopy (to_top_level, saved, sizeof (jmp_buf)); | |
81066208 | 254 | error_pre_print = errstring; |
bd5635a1 RP |
255 | |
256 | if (setjmp (to_top_level) == 0) | |
257 | val = (*func) (args); | |
258 | else | |
81066208 | 259 | val = 0; |
bd5635a1 RP |
260 | |
261 | restore_cleanups (saved_cleanup_chain); | |
262 | ||
81066208 | 263 | error_pre_print = saved_error_pre_print; |
bd5635a1 RP |
264 | bcopy (saved, to_top_level, sizeof (jmp_buf)); |
265 | return val; | |
266 | } | |
267 | ||
268 | /* Handler for SIGHUP. */ | |
269 | ||
270 | static void | |
271 | disconnect () | |
272 | { | |
273 | kill_inferior_fast (); | |
274 | signal (SIGHUP, SIG_DFL); | |
275 | kill (getpid (), SIGHUP); | |
276 | } | |
277 | \f | |
278 | /* Clean up on error during a "source" command (or execution of a | |
279 | user-defined command). */ | |
280 | ||
281 | static void | |
282 | source_cleanup (stream) | |
283 | FILE *stream; | |
284 | { | |
285 | /* Restore the previous input stream. */ | |
286 | instream = stream; | |
287 | } | |
288 | ||
289 | /* Read commands from STREAM. */ | |
290 | static void | |
291 | read_command_file (stream) | |
292 | FILE *stream; | |
293 | { | |
294 | struct cleanup *cleanups; | |
295 | ||
296 | cleanups = make_cleanup (source_cleanup, instream); | |
297 | instream = stream; | |
298 | command_loop (); | |
299 | do_cleanups (cleanups); | |
300 | } | |
301 | \f | |
302 | int | |
303 | main (argc, argv) | |
304 | int argc; | |
305 | char **argv; | |
306 | { | |
307 | int count; | |
308 | static int inhibit_gdbinit = 0; | |
309 | static int quiet = 0; | |
310 | static int batch = 0; | |
311 | ||
312 | /* Pointers to various arguments from command line. */ | |
313 | char *symarg = NULL; | |
314 | char *execarg = NULL; | |
315 | char *corearg = NULL; | |
316 | char *cdarg = NULL; | |
317 | char *ttyarg = NULL; | |
318 | ||
319 | /* Pointers to all arguments of +command option. */ | |
320 | char **cmdarg; | |
321 | /* Allocated size of cmdarg. */ | |
322 | int cmdsize; | |
323 | /* Number of elements of cmdarg used. */ | |
324 | int ncmd; | |
325 | ||
326 | /* Indices of all arguments of +directory option. */ | |
327 | char **dirarg; | |
328 | /* Allocated size. */ | |
329 | int dirsize; | |
330 | /* Number of elements used. */ | |
331 | int ndir; | |
332 | ||
333 | register int i; | |
334 | ||
335 | /* This needs to happen before the first use of malloc. */ | |
336 | init_malloc (); | |
337 | ||
338 | #if defined (ALIGN_STACK_ON_STARTUP) | |
339 | i = (int) &count & 0x3; | |
340 | if (i != 0) | |
341 | alloca (4 - i); | |
342 | #endif | |
343 | ||
bd099407 JG |
344 | /* If error() is called from initialization code, just exit */ |
345 | if (setjmp (to_top_level)) { | |
346 | exit(1); | |
347 | } | |
348 | ||
bd5635a1 RP |
349 | cmdsize = 1; |
350 | cmdarg = (char **) xmalloc (cmdsize * sizeof (*cmdarg)); | |
351 | ncmd = 0; | |
352 | dirsize = 1; | |
353 | dirarg = (char **) xmalloc (dirsize * sizeof (*dirarg)); | |
354 | ndir = 0; | |
355 | ||
356 | quit_flag = 0; | |
357 | line = (char *) xmalloc (linesize); | |
358 | line[0] = '\0'; /* Terminate saved (now empty) cmd line */ | |
359 | instream = stdin; | |
360 | ||
f7402c04 | 361 | getcwd (dirbuf, sizeof (dirbuf)); |
bd5635a1 RP |
362 | current_directory = dirbuf; |
363 | ||
364 | #ifdef SET_STACK_LIMIT_HUGE | |
365 | { | |
366 | struct rlimit rlim; | |
367 | ||
368 | /* Set the stack limit huge so that alloca (particularly stringtab | |
369 | * in dbxread.c) does not fail. */ | |
370 | getrlimit (RLIMIT_STACK, &rlim); | |
371 | original_stack_limit = rlim.rlim_cur; | |
372 | rlim.rlim_cur = rlim.rlim_max; | |
373 | setrlimit (RLIMIT_STACK, &rlim); | |
374 | } | |
375 | #endif /* SET_STACK_LIMIT_HUGE */ | |
376 | ||
377 | /* Parse arguments and options. */ | |
378 | { | |
379 | int c; | |
380 | static int print_help; | |
381 | /* When var field is 0, use flag field to record the equivalent | |
382 | short option (or arbitrary numbers starting at 10 for those | |
383 | with no equivalent). */ | |
384 | static struct option long_options[] = | |
385 | { | |
386 | {"quiet", 0, &quiet, 1}, | |
387 | {"nx", 0, &inhibit_gdbinit, 1}, | |
388 | {"batch", 0, &batch, 1}, | |
389 | {"epoch", 0, &epoch_interface, 1}, | |
390 | {"fullname", 0, &frame_file_full_name, 1}, | |
391 | {"help", 0, &print_help, 1}, | |
392 | {"se", 1, 0, 10}, | |
393 | {"symbols", 1, 0, 's'}, | |
394 | {"s", 1, 0, 's'}, | |
395 | {"exec", 1, 0, 'e'}, | |
396 | {"core", 1, 0, 'c'}, | |
397 | {"c", 1, 0, 'c'}, | |
398 | {"command", 1, 0, 'x'}, | |
399 | {"x", 1, 0, 'x'}, | |
400 | {"directory", 1, 0, 'd'}, | |
401 | {"cd", 1, 0, 11}, | |
402 | {"tty", 1, 0, 't'}, | |
403 | {"b", 1, 0, 'b'}, | |
404 | /* Allow machine descriptions to add more options... */ | |
405 | #ifdef ADDITIONAL_OPTIONS | |
406 | ADDITIONAL_OPTIONS | |
407 | #endif | |
bdbd5f50 | 408 | {0, 0, 0, 0}, |
bd5635a1 RP |
409 | }; |
410 | ||
411 | while (1) | |
412 | { | |
413 | c = getopt_long_only (argc, argv, "", | |
414 | long_options, &option_index); | |
415 | if (c == EOF) | |
416 | break; | |
417 | ||
418 | /* Long option that takes an argument. */ | |
419 | if (c == 0 && long_options[option_index].flag == 0) | |
420 | c = long_options[option_index].val; | |
421 | ||
422 | switch (c) | |
423 | { | |
424 | case 0: | |
425 | /* Long option that just sets a flag. */ | |
426 | break; | |
427 | case 10: | |
428 | symarg = optarg; | |
429 | execarg = optarg; | |
430 | break; | |
431 | case 11: | |
432 | cdarg = optarg; | |
433 | break; | |
434 | case 's': | |
435 | symarg = optarg; | |
436 | break; | |
437 | case 'e': | |
438 | execarg = optarg; | |
439 | break; | |
440 | case 'c': | |
441 | corearg = optarg; | |
442 | break; | |
443 | case 'x': | |
444 | cmdarg[ncmd++] = optarg; | |
445 | if (ncmd >= cmdsize) | |
446 | { | |
447 | cmdsize *= 2; | |
448 | cmdarg = (char **) xrealloc ((char *)cmdarg, | |
449 | cmdsize * sizeof (*cmdarg)); | |
450 | } | |
451 | break; | |
452 | case 'd': | |
453 | dirarg[ndir++] = optarg; | |
454 | if (ndir >= dirsize) | |
455 | { | |
456 | dirsize *= 2; | |
457 | dirarg = (char **) xrealloc ((char *)dirarg, | |
458 | dirsize * sizeof (*dirarg)); | |
459 | } | |
460 | break; | |
461 | case 't': | |
462 | ttyarg = optarg; | |
463 | break; | |
464 | case 'q': | |
465 | quiet = 1; | |
466 | break; | |
467 | case 'b': | |
468 | baud_rate = optarg; | |
469 | break; | |
470 | #ifdef ADDITIONAL_OPTION_CASES | |
471 | ADDITIONAL_OPTION_CASES | |
472 | #endif | |
473 | case '?': | |
474 | fprintf (stderr, | |
475 | "Use `%s +help' for a complete list of options.\n", | |
476 | argv[0]); | |
477 | exit (1); | |
478 | } | |
479 | ||
480 | } | |
481 | if (print_help) | |
482 | { | |
483 | fputs ("\ | |
484 | This is GDB, the GNU debugger. Use the command\n\ | |
485 | gdb [options] [executable [core-file]]\n\ | |
486 | to enter the debugger.\n\ | |
487 | \n\ | |
488 | Options available are:\n\ | |
489 | -help Print this message.\n\ | |
490 | -quiet Do not print version number on startup.\n\ | |
491 | -fullname Output information used by emacs-GDB interface.\n\ | |
492 | -epoch Output information used by epoch emacs-GDB interface.\n\ | |
493 | -batch Exit after processing options.\n\ | |
494 | -nx Do not read .gdbinit file.\n\ | |
495 | -tty=TTY Use TTY for input/output by the program being debugged.\n\ | |
496 | -cd=DIR Change current directory to DIR.\n\ | |
497 | -directory=DIR Search for source files in DIR.\n\ | |
498 | -command=FILE Execute GDB commands from FILE.\n\ | |
499 | -symbols=SYMFILE Read symbols from SYMFILE.\n\ | |
500 | -exec=EXECFILE Use EXECFILE as the executable.\n\ | |
501 | -se=FILE Use FILE as symbol file and executable file.\n\ | |
502 | -core=COREFILE Analyze the core dump COREFILE.\n\ | |
503 | -b BAUDRATE Set serial port baud rate used for remote debugging\n\ | |
504 | ", stderr); | |
505 | #ifdef ADDITIONAL_OPTION_HELP | |
506 | fputs (ADDITIONAL_OPTION_HELP, stderr); | |
507 | #endif | |
508 | fputs ("\n\ | |
509 | For more information, type \"help\" from within GDB, or consult the\n\ | |
510 | GDB manual (available as on-line info or a printed manual).\n", stderr); | |
511 | /* Exiting after printing this message seems like | |
512 | the most useful thing to do. */ | |
513 | exit (0); | |
514 | } | |
515 | ||
516 | /* OK, that's all the options. The other arguments are filenames. */ | |
517 | count = 0; | |
518 | for (; optind < argc; optind++) | |
519 | switch (++count) | |
520 | { | |
521 | case 1: | |
522 | symarg = argv[optind]; | |
523 | execarg = argv[optind]; | |
524 | break; | |
525 | case 2: | |
526 | corearg = argv[optind]; | |
527 | break; | |
528 | case 3: | |
529 | fprintf (stderr, | |
530 | "Excess command line arguments ignored. (%s%s)\n", | |
531 | argv[optind], (optind == argc - 1) ? "" : " ..."); | |
532 | break; | |
533 | } | |
534 | if (batch) | |
535 | quiet = 1; | |
536 | } | |
537 | ||
538 | /* Run the init function of each source file */ | |
539 | ||
540 | initialize_cmd_lists (); /* This needs to be done first */ | |
541 | initialize_all_files (); | |
542 | initialize_main (); /* But that omits this file! Do it now */ | |
543 | init_signals (); | |
544 | ||
545 | if (!quiet) | |
546 | { | |
81066208 JG |
547 | /* Print all the junk at the top, with trailing "..." if we are about |
548 | to read a symbol file (possibly slowly). */ | |
549 | print_gnu_advertisement (); | |
550 | print_gdb_version (); | |
551 | if (symarg) | |
552 | printf_filtered (".."); | |
bd099407 | 553 | wrap_here(""); |
81066208 | 554 | fflush (stdout); /* Force to screen during slow operations */ |
bd5635a1 RP |
555 | } |
556 | ||
81066208 JG |
557 | error_pre_print = "\n\n"; |
558 | ||
bd5635a1 RP |
559 | /* Now perform all the actions indicated by the arguments. */ |
560 | if (cdarg != NULL) | |
561 | { | |
562 | if (!setjmp (to_top_level)) | |
563 | { | |
564 | cd_command (cdarg, 0); | |
565 | init_source_path (); | |
566 | } | |
567 | } | |
f266e564 JK |
568 | do_cleanups (ALL_CLEANUPS); |
569 | ||
bd5635a1 RP |
570 | for (i = 0; i < ndir; i++) |
571 | if (!setjmp (to_top_level)) | |
572 | directory_command (dirarg[i], 0); | |
573 | free (dirarg); | |
f266e564 JK |
574 | do_cleanups (ALL_CLEANUPS); |
575 | ||
bd5635a1 RP |
576 | if (execarg != NULL |
577 | && symarg != NULL | |
578 | && strcmp (execarg, symarg) == 0) | |
579 | { | |
580 | /* The exec file and the symbol-file are the same. If we can't open | |
581 | it, better only print one error message. */ | |
582 | if (!setjmp (to_top_level)) | |
583 | { | |
584 | exec_file_command (execarg, !batch); | |
81066208 | 585 | symbol_file_command (symarg, 0); |
bd5635a1 RP |
586 | } |
587 | } | |
588 | else | |
589 | { | |
590 | if (execarg != NULL) | |
591 | if (!setjmp (to_top_level)) | |
592 | exec_file_command (execarg, !batch); | |
593 | if (symarg != NULL) | |
594 | if (!setjmp (to_top_level)) | |
81066208 | 595 | symbol_file_command (symarg, 0); |
bd5635a1 | 596 | } |
f266e564 JK |
597 | do_cleanups (ALL_CLEANUPS); |
598 | ||
81066208 JG |
599 | /* After the symbol file has been read, print a newline to get us |
600 | beyond the copyright line... But errors should still set off | |
601 | the error message with a (single) blank line. */ | |
afe4ca15 JG |
602 | if (!quiet) |
603 | printf_filtered ("\n"); | |
81066208 JG |
604 | error_pre_print = "\n"; |
605 | ||
7d9884b9 JG |
606 | /* Set the initial language. */ |
607 | { | |
608 | extern enum language deduce_language_from_filename (); | |
609 | extern struct partial_symtab *find_main_psymtab (); | |
610 | struct partial_symtab *pst = find_main_psymtab (); | |
611 | enum language lang = language_unknown; | |
612 | if (pst == NULL) ; | |
613 | #if 0 | |
614 | /* A better solution would set the language when reading the psymtab. | |
615 | This would win for symbol file formats that encode the langauge, | |
616 | such as dwarf. But, we don't do that yet. FIXME */ | |
617 | else if (pst->language != language_unknown) | |
618 | lang = pst->language; | |
619 | #endif | |
620 | else if (pst->filename != NULL) | |
621 | lang = deduce_language_from_filename (pst->filename); | |
622 | if (lang == language_unknown) /* Make C the default language */ | |
623 | lang = language_c; | |
624 | set_language (lang); | |
625 | } | |
626 | ||
bd5635a1 RP |
627 | if (corearg != NULL) |
628 | if (!setjmp (to_top_level)) | |
629 | core_file_command (corearg, !batch); | |
e522fb52 | 630 | else if (isdigit (corearg[0]) && !setjmp (to_top_level)) |
bd5635a1 | 631 | attach_command (corearg, !batch); |
f266e564 | 632 | do_cleanups (ALL_CLEANUPS); |
bd5635a1 RP |
633 | |
634 | if (ttyarg != NULL) | |
635 | if (!setjmp (to_top_level)) | |
636 | tty_command (ttyarg, !batch); | |
f266e564 | 637 | do_cleanups (ALL_CLEANUPS); |
bd5635a1 RP |
638 | |
639 | #ifdef ADDITIONAL_OPTION_HANDLER | |
640 | ADDITIONAL_OPTION_HANDLER; | |
641 | #endif | |
642 | ||
81066208 JG |
643 | /* Error messages should no longer be distinguished with extra output. */ |
644 | error_pre_print = 0; | |
645 | ||
bd5635a1 RP |
646 | { |
647 | struct stat homebuf, cwdbuf; | |
648 | char *homedir, *homeinit; | |
649 | ||
650 | /* Read init file, if it exists in home directory */ | |
651 | homedir = getenv ("HOME"); | |
652 | if (homedir) | |
653 | { | |
654 | homeinit = (char *) alloca (strlen (getenv ("HOME")) + | |
655 | strlen (gdbinit) + 10); | |
656 | strcpy (homeinit, getenv ("HOME")); | |
657 | strcat (homeinit, "/"); | |
658 | strcat (homeinit, gdbinit); | |
659 | if (!inhibit_gdbinit && access (homeinit, R_OK) == 0) | |
660 | if (!setjmp (to_top_level)) | |
661 | source_command (homeinit, 0); | |
f266e564 | 662 | do_cleanups (ALL_CLEANUPS); |
bd5635a1 RP |
663 | |
664 | /* Do stats; no need to do them elsewhere since we'll only | |
665 | need them if homedir is set. Make sure that they are | |
666 | zero in case one of them fails (this guarantees that they | |
667 | won't match if either exists). */ | |
668 | ||
669 | bzero (&homebuf, sizeof (struct stat)); | |
670 | bzero (&cwdbuf, sizeof (struct stat)); | |
671 | ||
672 | stat (homeinit, &homebuf); | |
673 | stat (gdbinit, &cwdbuf); /* We'll only need this if | |
674 | homedir was set. */ | |
675 | } | |
676 | ||
677 | /* Read the input file in the current directory, *if* it isn't | |
678 | the same file (it should exist, also). */ | |
679 | ||
680 | if (!homedir | |
681 | || bcmp ((char *) &homebuf, | |
682 | (char *) &cwdbuf, | |
683 | sizeof (struct stat))) | |
684 | if (!inhibit_gdbinit && access (gdbinit, R_OK) == 0) | |
685 | if (!setjmp (to_top_level)) | |
686 | source_command (gdbinit, 0); | |
f266e564 | 687 | do_cleanups (ALL_CLEANUPS); |
bd5635a1 RP |
688 | } |
689 | ||
690 | for (i = 0; i < ncmd; i++) | |
691 | if (!setjmp (to_top_level)) | |
692 | { | |
693 | if (cmdarg[i][0] == '-' && cmdarg[i][1] == '\0') | |
694 | read_command_file (stdin); | |
695 | else | |
696 | source_command (cmdarg[i], !batch); | |
f266e564 | 697 | do_cleanups (ALL_CLEANUPS); |
bd5635a1 RP |
698 | } |
699 | free (cmdarg); | |
700 | ||
8b3c897a SG |
701 | /* Read in the old history after all the command files have been read. */ |
702 | initialize_history(); | |
703 | ||
bd5635a1 RP |
704 | if (batch) |
705 | { | |
706 | /* We have hit the end of the batch file. */ | |
707 | exit (0); | |
708 | } | |
709 | ||
710 | /* Do any host- or target-specific hacks. This is used for i960 targets | |
711 | to force the user to set a nindy target and spec its parameters. */ | |
712 | ||
713 | #ifdef BEFORE_MAIN_LOOP_HOOK | |
714 | BEFORE_MAIN_LOOP_HOOK; | |
715 | #endif | |
716 | ||
717 | /* The command loop. */ | |
718 | ||
719 | while (1) | |
720 | { | |
721 | if (!setjmp (to_top_level)) | |
722 | { | |
f266e564 | 723 | do_cleanups (ALL_CLEANUPS); /* Do complete cleanup */ |
bd5635a1 RP |
724 | command_loop (); |
725 | quit_command ((char *)0, instream == stdin); | |
726 | } | |
727 | } | |
728 | /* No exit -- exit is through quit_command. */ | |
729 | } | |
730 | ||
731 | /* Execute the line P as a command. | |
732 | Pass FROM_TTY as second argument to the defining function. */ | |
733 | ||
734 | void | |
735 | execute_command (p, from_tty) | |
736 | char *p; | |
737 | int from_tty; | |
738 | { | |
739 | register struct cmd_list_element *c; | |
740 | register struct command_line *cmdlines; | |
bd099407 | 741 | register enum language flang; |
afe4ca15 | 742 | static struct language_defn *saved_language = 0; |
bd099407 | 743 | static int warned = 0; |
bd5635a1 RP |
744 | |
745 | free_all_values (); | |
746 | ||
747 | /* This can happen when command_line_input hits end of file. */ | |
748 | if (p == NULL) | |
749 | return; | |
750 | ||
751 | while (*p == ' ' || *p == '\t') p++; | |
752 | if (*p) | |
753 | { | |
754 | char *arg; | |
755 | ||
756 | c = lookup_cmd (&p, cmdlist, "", 0, 1); | |
757 | /* Pass null arg rather than an empty one. */ | |
758 | arg = *p ? p : 0; | |
759 | if (c->class == class_user) | |
760 | { | |
761 | struct cleanup *old_chain; | |
762 | ||
763 | if (*p) | |
764 | error ("User-defined commands cannot take arguments."); | |
765 | cmdlines = c->user_commands; | |
766 | if (cmdlines == 0) | |
767 | /* Null command */ | |
768 | return; | |
769 | ||
770 | /* Set the instream to 0, indicating execution of a | |
771 | user-defined function. */ | |
772 | old_chain = make_cleanup (source_cleanup, instream); | |
773 | instream = (FILE *) 0; | |
774 | while (cmdlines) | |
775 | { | |
776 | execute_command (cmdlines->line, 0); | |
777 | cmdlines = cmdlines->next; | |
778 | } | |
779 | do_cleanups (old_chain); | |
780 | } | |
781 | else if (c->type == set_cmd || c->type == show_cmd) | |
782 | do_setshow_command (arg, from_tty & caution, c); | |
783 | else if (c->function == NO_FUNCTION) | |
784 | error ("That is not a command, just a help topic."); | |
785 | else | |
786 | (*c->function) (arg, from_tty & caution); | |
bd099407 JG |
787 | } |
788 | ||
afe4ca15 JG |
789 | /* Tell the user if the language has changed (except first time). */ |
790 | if (current_language != saved_language) | |
bd099407 JG |
791 | { |
792 | if (language_mode == language_mode_auto) { | |
afe4ca15 | 793 | if (saved_language) |
bd099407 | 794 | language_info (); |
bd5635a1 | 795 | } |
afe4ca15 | 796 | saved_language = current_language; |
bd099407 JG |
797 | warned = 0; |
798 | } | |
799 | ||
800 | /* Warn the user if the working language does not match the | |
801 | language of the current frame. Only warn the user if we are | |
802 | actually running the program, i.e. there is a stack. */ | |
afe4ca15 JG |
803 | /* FIXME: This should be cacheing the frame and only running when |
804 | the frame changes. */ | |
bd099407 JG |
805 | if (target_has_stack) |
806 | { | |
afe4ca15 JG |
807 | flang = get_frame_language (); |
808 | if (!warned | |
809 | && flang != language_unknown | |
810 | && flang != current_language->la_language) | |
bd099407 JG |
811 | { |
812 | printf_filtered ("%s\n", lang_frame_mismatch_warn); | |
813 | warned = 1; | |
814 | } | |
815 | } | |
bd5635a1 RP |
816 | } |
817 | ||
818 | /* ARGSUSED */ | |
f266e564 JK |
819 | void |
820 | command_loop_marker (foo) | |
bd5635a1 RP |
821 | int foo; |
822 | { | |
823 | } | |
824 | ||
825 | /* Read commands from `instream' and execute them | |
826 | until end of file or error reading instream. */ | |
827 | void | |
828 | command_loop () | |
829 | { | |
830 | struct cleanup *old_chain; | |
831 | char *command; | |
832 | int stdin_is_tty = ISATTY (stdin); | |
833 | ||
834 | while (!feof (instream)) | |
835 | { | |
836 | if (window_hook && instream == stdin) | |
837 | (*window_hook) (instream, prompt); | |
838 | ||
839 | quit_flag = 0; | |
840 | if (instream == stdin && stdin_is_tty) | |
841 | reinitialize_more_filter (); | |
f266e564 | 842 | old_chain = make_cleanup (command_loop_marker, 0); |
bd5635a1 RP |
843 | command = command_line_input (instream == stdin ? prompt : 0, |
844 | instream == stdin); | |
845 | if (command == 0) | |
846 | return; | |
847 | execute_command (command, instream == stdin); | |
848 | /* Do any commands attached to breakpoint we stopped at. */ | |
849 | bpstat_do_actions (&stop_bpstat); | |
850 | do_cleanups (old_chain); | |
851 | } | |
852 | } | |
853 | \f | |
854 | /* Commands call this if they do not want to be repeated by null lines. */ | |
855 | ||
856 | void | |
857 | dont_repeat () | |
858 | { | |
859 | /* If we aren't reading from standard input, we are saving the last | |
860 | thing read from stdin in line and don't want to delete it. Null lines | |
861 | won't repeat here in any case. */ | |
862 | if (instream == stdin) | |
863 | *line = 0; | |
864 | } | |
865 | \f | |
866 | /* Read a line from the stream "instream" without command line editing. | |
867 | ||
868 | It prints PRROMPT once at the start. | |
bdbd5f50 JG |
869 | Action is compatible with "readline", e.g. space for the result is |
870 | malloc'd and should be freed by the caller. | |
bd5635a1 | 871 | |
bdbd5f50 | 872 | A NULL return means end of file. */ |
bd5635a1 | 873 | char * |
bdbd5f50 | 874 | gdb_readline (prrompt) |
bd5635a1 | 875 | char *prrompt; |
bd5635a1 RP |
876 | { |
877 | int c; | |
878 | char *result; | |
879 | int input_index = 0; | |
880 | int result_size = 80; | |
881 | ||
882 | if (prrompt) | |
883 | { | |
884 | printf (prrompt); | |
885 | fflush (stdout); | |
886 | } | |
887 | ||
bdbd5f50 | 888 | result = (char *) xmalloc (result_size); |
bd5635a1 RP |
889 | |
890 | while (1) | |
891 | { | |
892 | /* Read from stdin if we are executing a user defined command. | |
893 | This is the right thing for prompt_for_continue, at least. */ | |
894 | c = fgetc (instream ? instream : stdin); | |
bdbd5f50 JG |
895 | |
896 | if (c == EOF) | |
bd5635a1 | 897 | { |
bdbd5f50 JG |
898 | free (result); |
899 | return NULL; | |
bd5635a1 | 900 | } |
bd5635a1 | 901 | |
bdbd5f50 JG |
902 | if (c == '\n') |
903 | break; | |
bd5635a1 | 904 | |
bdbd5f50 JG |
905 | result[input_index++] = c; |
906 | while (input_index >= result_size) | |
907 | { | |
908 | result_size *= 2; | |
909 | result = (char *) xrealloc (result, result_size); | |
910 | } | |
bd5635a1 | 911 | } |
bdbd5f50 JG |
912 | |
913 | result[input_index++] = '\0'; | |
914 | return result; | |
bd5635a1 RP |
915 | } |
916 | ||
917 | /* Declaration for fancy readline with command line editing. */ | |
918 | char *readline (); | |
919 | ||
920 | /* Variables which control command line editing and history | |
921 | substitution. These variables are given default values at the end | |
922 | of this file. */ | |
923 | static int command_editing_p; | |
924 | static int history_expansion_p; | |
925 | static int write_history_p; | |
926 | static int history_size; | |
927 | static char *history_filename; | |
928 | ||
929 | /* Variables which are necessary for fancy command line editing. */ | |
930 | char *gdb_completer_word_break_characters = | |
931 | " \t\n!@#$%^&*()-+=|~`}{[]\"';:?/>.<,"; | |
932 | ||
933 | /* Functions that are used as part of the fancy command line editing. */ | |
934 | ||
935 | /* This can be used for functions which don't want to complete on symbols | |
936 | but don't want to complete on anything else either. */ | |
937 | /* ARGSUSED */ | |
938 | char ** | |
939 | noop_completer (text) | |
940 | char *text; | |
941 | { | |
942 | return NULL; | |
943 | } | |
944 | ||
945 | /* Generate symbol names one by one for the completer. If STATE is | |
946 | zero, then we need to initialize, otherwise the initialization has | |
947 | already taken place. TEXT is what we expect the symbol to start | |
948 | with. RL_LINE_BUFFER is available to be looked at; it contains the | |
949 | entire text of the line. RL_POINT is the offset in that line of | |
950 | the cursor. You should pretend that the line ends at RL_POINT. | |
951 | The result is NULL if there are no more completions, else a char | |
952 | string which is a possible completion. */ | |
953 | char * | |
954 | symbol_completion_function (text, state) | |
955 | char *text; | |
956 | int state; | |
957 | { | |
958 | static char **list = (char **)NULL; | |
959 | static int index; | |
960 | char *output; | |
961 | extern char *rl_line_buffer; | |
962 | extern int rl_point; | |
963 | char *tmp_command, *p; | |
964 | struct cmd_list_element *c, *result_list; | |
965 | ||
966 | if (!state) | |
967 | { | |
968 | /* Free the storage used by LIST, but not by the strings inside. This is | |
969 | because rl_complete_internal () frees the strings. */ | |
970 | if (list) | |
971 | free (list); | |
972 | list = 0; | |
973 | index = 0; | |
974 | ||
975 | /* Decide whether to complete on a list of gdb commands or on | |
976 | symbols. */ | |
977 | tmp_command = (char *) alloca (rl_point + 1); | |
978 | p = tmp_command; | |
979 | ||
980 | strncpy (tmp_command, rl_line_buffer, rl_point); | |
981 | tmp_command[rl_point] = '\0'; | |
982 | ||
983 | if (rl_point == 0) | |
984 | { | |
985 | /* An empty line we want to consider ambiguous; that is, | |
986 | it could be any command. */ | |
987 | c = (struct cmd_list_element *) -1; | |
988 | result_list = 0; | |
989 | } | |
990 | else | |
991 | c = lookup_cmd_1 (&p, cmdlist, &result_list, 1); | |
992 | ||
993 | /* Move p up to the next interesting thing. */ | |
994 | while (*p == ' ' || *p == '\t') | |
995 | p++; | |
996 | ||
997 | if (!c) | |
998 | /* He's typed something unrecognizable. Sigh. */ | |
999 | list = (char **) 0; | |
1000 | else if (c == (struct cmd_list_element *) -1) | |
1001 | { | |
1002 | /* If we didn't recognize everything up to the thing that | |
1003 | needs completing, and we don't know what command it is | |
1004 | yet, we are in trouble. Part of the trouble might be | |
1005 | that the list of delimiters used by readline includes | |
1006 | '-', which we use in commands. Check for this. */ | |
1007 | if (p + strlen(text) != tmp_command + rl_point) { | |
1008 | if (tmp_command[rl_point - strlen(text) - 1] == '-') | |
1009 | text = p; | |
1010 | else { | |
1011 | /* This really should not produce an error. Better would | |
1012 | be to pretend to hit RETURN here; this would produce a | |
1013 | response like "Ambiguous command: foo, foobar, etc", | |
1014 | and leave the line available for re-entry with ^P. Instead, | |
1015 | this error blows away the user's typed input without | |
1016 | any way to get it back. */ | |
1017 | error (" Unrecognized command."); | |
1018 | } | |
1019 | } | |
1020 | ||
1021 | /* He's typed something ambiguous. This is easier. */ | |
1022 | if (result_list) | |
1023 | list = complete_on_cmdlist (*result_list->prefixlist, text); | |
1024 | else | |
1025 | list = complete_on_cmdlist (cmdlist, text); | |
1026 | } | |
1027 | else | |
1028 | { | |
1029 | /* If we've gotten this far, gdb has recognized a full | |
1030 | command. There are several possibilities: | |
1031 | ||
1032 | 1) We need to complete on the command. | |
1033 | 2) We need to complete on the possibilities coming after | |
1034 | the command. | |
1035 | 2) We need to complete the text of what comes after the | |
1036 | command. */ | |
1037 | ||
1038 | if (!*p && *text) | |
1039 | /* Always (might be longer versions of thie command). */ | |
1040 | list = complete_on_cmdlist (result_list, text); | |
1041 | else if (!*p && !*text) | |
1042 | { | |
1043 | if (c->prefixlist) | |
1044 | list = complete_on_cmdlist (*c->prefixlist, ""); | |
1045 | else | |
1046 | list = (*c->completer) (""); | |
1047 | } | |
1048 | else | |
1049 | { | |
1050 | if (c->prefixlist && !c->allow_unknown) | |
1051 | { | |
1052 | #if 0 | |
1053 | /* Something like "info adsfkdj". But error() is not | |
1054 | the proper response; just return no completions | |
1055 | instead. */ | |
1056 | *p = '\0'; | |
1057 | error ("\"%s\" command requires a subcommand.", | |
1058 | tmp_command); | |
1059 | #else | |
1060 | list = NULL; | |
1061 | #endif | |
1062 | } | |
1063 | else | |
1064 | list = (*c->completer) (text); | |
1065 | } | |
1066 | } | |
1067 | } | |
1068 | ||
1069 | /* If the debugged program wasn't compiled with symbols, or if we're | |
1070 | clearly completing on a command and no command matches, return | |
1071 | NULL. */ | |
1072 | if (!list) | |
1073 | return ((char *)NULL); | |
1074 | ||
1075 | output = list[index]; | |
1076 | if (output) | |
1077 | index++; | |
1078 | ||
1079 | return (output); | |
1080 | } | |
1081 | \f | |
1082 | #ifdef STOP_SIGNAL | |
1083 | static void | |
1084 | stop_sig () | |
1085 | { | |
1086 | #if STOP_SIGNAL == SIGTSTP | |
1087 | signal (SIGTSTP, SIG_DFL); | |
1088 | sigsetmask (0); | |
1089 | kill (getpid (), SIGTSTP); | |
1090 | signal (SIGTSTP, stop_sig); | |
1091 | #else | |
1092 | signal (STOP_SIGNAL, stop_sig); | |
1093 | #endif | |
1094 | printf ("%s", prompt); | |
1095 | fflush (stdout); | |
1096 | ||
1097 | /* Forget about any previous command -- null line now will do nothing. */ | |
1098 | dont_repeat (); | |
1099 | } | |
1100 | #endif /* STOP_SIGNAL */ | |
1101 | ||
bd5635a1 | 1102 | /* Initialize signal handlers. */ |
f266e564 JK |
1103 | static void |
1104 | do_nothing () | |
1105 | { | |
1106 | } | |
1107 | ||
bd5635a1 RP |
1108 | static void |
1109 | init_signals () | |
1110 | { | |
1111 | extern void request_quit (); | |
bd5635a1 RP |
1112 | |
1113 | signal (SIGINT, request_quit); | |
1114 | ||
1115 | /* If we initialize SIGQUIT to SIG_IGN, then the SIG_IGN will get | |
1116 | passed to the inferior, which we don't want. It would be | |
1117 | possible to do a "signal (SIGQUIT, SIG_DFL)" after we fork, but | |
bdbd5f50 | 1118 | on BSD4.3 systems using vfork, that can affect the |
bd5635a1 | 1119 | GDB process as well as the inferior (the signal handling tables |
bdbd5f50 | 1120 | might be in memory, shared between the two). Since we establish |
bd5635a1 RP |
1121 | a handler for SIGQUIT, when we call exec it will set the signal |
1122 | to SIG_DFL for us. */ | |
1123 | signal (SIGQUIT, do_nothing); | |
1124 | if (signal (SIGHUP, do_nothing) != SIG_IGN) | |
1125 | signal (SIGHUP, disconnect); | |
1126 | signal (SIGFPE, float_handler); | |
1127 | } | |
1128 | \f | |
1129 | /* Read one line from the command input stream `instream' | |
1130 | into the local static buffer `linebuffer' (whose current length | |
1131 | is `linelength'). | |
1132 | The buffer is made bigger as necessary. | |
1133 | Returns the address of the start of the line. | |
1134 | ||
1135 | NULL is returned for end of file. | |
1136 | ||
1137 | *If* the instream == stdin & stdin is a terminal, the line read | |
1138 | is copied into the file line saver (global var char *line, | |
1139 | length linesize) so that it can be duplicated. | |
1140 | ||
1141 | This routine either uses fancy command line editing or | |
1142 | simple input as the user has requested. */ | |
1143 | ||
1144 | char * | |
1145 | command_line_input (prrompt, repeat) | |
1146 | char *prrompt; | |
1147 | int repeat; | |
1148 | { | |
1149 | static char *linebuffer = 0; | |
1150 | static int linelength = 0; | |
1151 | register char *p; | |
1152 | char *p1; | |
1153 | char *rl; | |
1154 | char *local_prompt = prrompt; | |
1155 | register int c; | |
1156 | char *nline; | |
1157 | char got_eof = 0; | |
1158 | ||
1159 | if (linebuffer == 0) | |
1160 | { | |
1161 | linelength = 80; | |
1162 | linebuffer = (char *) xmalloc (linelength); | |
1163 | } | |
1164 | ||
1165 | p = linebuffer; | |
1166 | ||
1167 | /* Control-C quits instantly if typed while in this loop | |
1168 | since it should not wait until the user types a newline. */ | |
1169 | immediate_quit++; | |
1170 | #ifdef STOP_SIGNAL | |
1171 | signal (STOP_SIGNAL, stop_sig); | |
1172 | #endif | |
1173 | ||
1174 | while (1) | |
1175 | { | |
e522fb52 JG |
1176 | /* Reports are that some Sys V's don't flush stdout/err on reads |
1177 | from stdin, when stdin/out are sockets rather than ttys. So we | |
1178 | have to do it ourselves, to make emacs-gdb and xxgdb work. | |
1179 | On other machines, doing this once per input should be a cheap nop. */ | |
1180 | fflush (stdout); | |
1181 | fflush (stderr); | |
1182 | ||
bd5635a1 RP |
1183 | /* Don't use fancy stuff if not talking to stdin. */ |
1184 | if (command_editing_p && instream == stdin | |
1185 | && ISATTY (instream)) | |
1186 | rl = readline (local_prompt); | |
1187 | else | |
bdbd5f50 | 1188 | rl = gdb_readline (local_prompt); |
bd5635a1 RP |
1189 | |
1190 | if (!rl || rl == (char *) EOF) | |
1191 | { | |
1192 | got_eof = 1; | |
1193 | break; | |
1194 | } | |
1195 | if (strlen(rl) + 1 + (p - linebuffer) > linelength) | |
1196 | { | |
1197 | linelength = strlen(rl) + 1 + (p - linebuffer); | |
1198 | nline = (char *) xrealloc (linebuffer, linelength); | |
1199 | p += nline - linebuffer; | |
1200 | linebuffer = nline; | |
1201 | } | |
1202 | p1 = rl; | |
1203 | /* Copy line. Don't copy null at end. (Leaves line alone | |
1204 | if this was just a newline) */ | |
1205 | while (*p1) | |
1206 | *p++ = *p1++; | |
1207 | ||
1208 | free (rl); /* Allocated in readline. */ | |
1209 | ||
1210 | if (p == linebuffer || *(p - 1) != '\\') | |
1211 | break; | |
1212 | ||
1213 | p--; /* Put on top of '\'. */ | |
1214 | local_prompt = (char *) 0; | |
1215 | } | |
1216 | ||
1217 | #ifdef STOP_SIGNAL | |
1218 | signal (SIGTSTP, SIG_DFL); | |
1219 | #endif | |
1220 | immediate_quit--; | |
1221 | ||
1222 | if (got_eof) | |
1223 | return NULL; | |
1224 | ||
1225 | /* Do history expansion if that is wished. */ | |
1226 | if (history_expansion_p && instream == stdin | |
1227 | && ISATTY (instream)) | |
1228 | { | |
1229 | char *history_value; | |
1230 | int expanded; | |
1231 | ||
1232 | *p = '\0'; /* Insert null now. */ | |
1233 | expanded = history_expand (linebuffer, &history_value); | |
1234 | if (expanded) | |
1235 | { | |
1236 | /* Print the changes. */ | |
1237 | printf ("%s\n", history_value); | |
1238 | ||
1239 | /* If there was an error, call this function again. */ | |
1240 | if (expanded < 0) | |
1241 | { | |
1242 | free (history_value); | |
1243 | return command_line_input (prrompt, repeat); | |
1244 | } | |
1245 | if (strlen (history_value) > linelength) | |
1246 | { | |
1247 | linelength = strlen (history_value) + 1; | |
1248 | linebuffer = (char *) xrealloc (linebuffer, linelength); | |
1249 | } | |
1250 | strcpy (linebuffer, history_value); | |
1251 | p = linebuffer + strlen(linebuffer); | |
1252 | free (history_value); | |
1253 | } | |
1254 | } | |
1255 | ||
1256 | /* If we just got an empty line, and that is supposed | |
1257 | to repeat the previous command, return the value in the | |
1258 | global buffer. */ | |
1259 | if (repeat) | |
1260 | { | |
1261 | if (p == linebuffer) | |
1262 | return line; | |
1263 | p1 = linebuffer; | |
1264 | while (*p1 == ' ' || *p1 == '\t') | |
1265 | p1++; | |
1266 | if (!*p1) | |
1267 | return line; | |
1268 | } | |
1269 | ||
1270 | *p = 0; | |
1271 | ||
1272 | /* Add line to history if appropriate. */ | |
1273 | if (instream == stdin | |
1274 | && ISATTY (stdin) && *linebuffer) | |
1275 | add_history (linebuffer); | |
1276 | ||
1277 | /* Note: lines consisting soley of comments are added to the command | |
1278 | history. This is useful when you type a command, and then | |
1279 | realize you don't want to execute it quite yet. You can comment | |
1280 | out the command and then later fetch it from the value history | |
1281 | and remove the '#'. The kill ring is probably better, but some | |
1282 | people are in the habit of commenting things out. */ | |
1283 | p1 = linebuffer; | |
1284 | while ((c = *p1++) != '\0') | |
1285 | { | |
1286 | if (c == '"') | |
1287 | while ((c = *p1++) != '"') | |
1288 | { | |
1289 | /* Make sure an escaped '"' doesn't make us think the string | |
1290 | is ended. */ | |
1291 | if (c == '\\') | |
1292 | parse_escape (&p1); | |
1293 | if (c == '\0') | |
1294 | break; | |
1295 | } | |
1296 | else if (c == '\'') | |
1297 | while ((c = *p1++) != '\'') | |
1298 | { | |
1299 | /* Make sure an escaped '\'' doesn't make us think the string | |
1300 | is ended. */ | |
1301 | if (c == '\\') | |
1302 | parse_escape (&p1); | |
1303 | if (c == '\0') | |
1304 | break; | |
1305 | } | |
1306 | else if (c == '#') | |
1307 | { | |
1308 | /* Found a comment. */ | |
1309 | p1[-1] = '\0'; | |
1310 | break; | |
1311 | } | |
1312 | } | |
1313 | ||
1314 | /* Save into global buffer if appropriate. */ | |
1315 | if (repeat) | |
1316 | { | |
1317 | if (linelength > linesize) | |
1318 | { | |
1319 | line = xrealloc (line, linelength); | |
1320 | linesize = linelength; | |
1321 | } | |
1322 | strcpy (line, linebuffer); | |
1323 | return line; | |
1324 | } | |
1325 | ||
1326 | return linebuffer; | |
1327 | } | |
1328 | \f | |
1329 | /* Read lines from the input stream | |
1330 | and accumulate them in a chain of struct command_line's | |
1331 | which is then returned. */ | |
1332 | ||
1333 | struct command_line * | |
1334 | read_command_lines () | |
1335 | { | |
1336 | struct command_line *first = 0; | |
1337 | register struct command_line *next, *tail = 0; | |
1338 | register char *p, *p1; | |
1339 | struct cleanup *old_chain = 0; | |
1340 | ||
1341 | while (1) | |
1342 | { | |
1343 | dont_repeat (); | |
1344 | p = command_line_input (0, instream == stdin); | |
1345 | if (p == NULL) | |
1346 | /* Treat end of file like "end". */ | |
1347 | break; | |
1348 | ||
1349 | /* Remove leading and trailing blanks. */ | |
1350 | while (*p == ' ' || *p == '\t') p++; | |
1351 | p1 = p + strlen (p); | |
1352 | while (p1 != p && (p1[-1] == ' ' || p1[-1] == '\t')) p1--; | |
1353 | ||
1354 | /* Is this "end"? */ | |
1355 | if (p1 - p == 3 && !strncmp (p, "end", 3)) | |
1356 | break; | |
1357 | ||
1358 | /* No => add this line to the chain of command lines. */ | |
1359 | next = (struct command_line *) xmalloc (sizeof (struct command_line)); | |
1360 | next->line = savestring (p, p1 - p); | |
1361 | next->next = 0; | |
1362 | if (tail) | |
1363 | { | |
1364 | tail->next = next; | |
1365 | } | |
1366 | else | |
1367 | { | |
1368 | /* We just read the first line. | |
1369 | From now on, arrange to throw away the lines we have | |
1370 | if we quit or get an error while inside this function. */ | |
1371 | first = next; | |
1372 | old_chain = make_cleanup (free_command_lines, &first); | |
1373 | } | |
1374 | tail = next; | |
1375 | } | |
1376 | ||
1377 | dont_repeat (); | |
1378 | ||
1379 | /* Now we are about to return the chain to our caller, | |
1380 | so freeing it becomes his responsibility. */ | |
1381 | if (first) | |
1382 | discard_cleanups (old_chain); | |
1383 | return first; | |
1384 | } | |
1385 | ||
1386 | /* Free a chain of struct command_line's. */ | |
1387 | ||
1388 | void | |
1389 | free_command_lines (lptr) | |
1390 | struct command_line **lptr; | |
1391 | { | |
1392 | register struct command_line *l = *lptr; | |
1393 | register struct command_line *next; | |
1394 | ||
1395 | while (l) | |
1396 | { | |
1397 | next = l->next; | |
1398 | free (l->line); | |
1399 | free (l); | |
1400 | l = next; | |
1401 | } | |
1402 | } | |
1403 | \f | |
1404 | /* Add an element to the list of info subcommands. */ | |
1405 | ||
1406 | void | |
1407 | add_info (name, fun, doc) | |
1408 | char *name; | |
1409 | void (*fun) (); | |
1410 | char *doc; | |
1411 | { | |
1412 | add_cmd (name, no_class, fun, doc, &infolist); | |
1413 | } | |
1414 | ||
1415 | /* Add an alias to the list of info subcommands. */ | |
1416 | ||
1417 | void | |
1418 | add_info_alias (name, oldname, abbrev_flag) | |
1419 | char *name; | |
1420 | char *oldname; | |
1421 | int abbrev_flag; | |
1422 | { | |
1423 | add_alias_cmd (name, oldname, 0, abbrev_flag, &infolist); | |
1424 | } | |
1425 | ||
1426 | /* The "info" command is defined as a prefix, with allow_unknown = 0. | |
1427 | Therefore, its own definition is called only for "info" with no args. */ | |
1428 | ||
1429 | /* ARGSUSED */ | |
1430 | static void | |
1431 | info_command (arg, from_tty) | |
1432 | char *arg; | |
1433 | int from_tty; | |
1434 | { | |
1435 | printf ("\"info\" must be followed by the name of an info command.\n"); | |
1436 | help_list (infolist, "info ", -1, stdout); | |
1437 | } | |
1438 | ||
1439 | /* The "show" command with no arguments shows all the settings. */ | |
1440 | ||
1441 | /* ARGSUSED */ | |
1442 | static void | |
1443 | show_command (arg, from_tty) | |
1444 | char *arg; | |
1445 | int from_tty; | |
1446 | { | |
1447 | cmd_show_list (showlist, from_tty, ""); | |
1448 | } | |
1449 | \f | |
1450 | /* Add an element to the list of commands. */ | |
1451 | ||
1452 | void | |
1453 | add_com (name, class, fun, doc) | |
1454 | char *name; | |
1455 | enum command_class class; | |
1456 | void (*fun) (); | |
1457 | char *doc; | |
1458 | { | |
1459 | add_cmd (name, class, fun, doc, &cmdlist); | |
1460 | } | |
1461 | ||
1462 | /* Add an alias or abbreviation command to the list of commands. */ | |
1463 | ||
1464 | void | |
1465 | add_com_alias (name, oldname, class, abbrev_flag) | |
1466 | char *name; | |
1467 | char *oldname; | |
1468 | enum command_class class; | |
1469 | int abbrev_flag; | |
1470 | { | |
1471 | add_alias_cmd (name, oldname, class, abbrev_flag, &cmdlist); | |
1472 | } | |
1473 | ||
1474 | void | |
1475 | error_no_arg (why) | |
1476 | char *why; | |
1477 | { | |
1478 | error ("Argument required (%s).", why); | |
1479 | } | |
1480 | ||
e1ce8aa5 | 1481 | /* ARGSUSED */ |
bd5635a1 RP |
1482 | static void |
1483 | help_command (command, from_tty) | |
1484 | char *command; | |
1485 | int from_tty; /* Ignored */ | |
1486 | { | |
1487 | help_cmd (command, stdout); | |
1488 | } | |
1489 | \f | |
1490 | static void | |
1491 | validate_comname (comname) | |
1492 | char *comname; | |
1493 | { | |
1494 | register char *p; | |
1495 | ||
1496 | if (comname == 0) | |
1497 | error_no_arg ("name of command to define"); | |
1498 | ||
1499 | p = comname; | |
1500 | while (*p) | |
1501 | { | |
1502 | if (!(*p >= 'A' && *p <= 'Z') | |
1503 | && !(*p >= 'a' && *p <= 'z') | |
1504 | && !(*p >= '0' && *p <= '9') | |
1505 | && *p != '-') | |
1506 | error ("Junk in argument list: \"%s\"", p); | |
1507 | p++; | |
1508 | } | |
1509 | } | |
1510 | ||
1511 | static void | |
1512 | define_command (comname, from_tty) | |
1513 | char *comname; | |
1514 | int from_tty; | |
1515 | { | |
1516 | register struct command_line *cmds; | |
1517 | register struct cmd_list_element *c, *newc; | |
1518 | char *tem = comname; | |
1519 | extern void not_just_help_class_command (); | |
1520 | ||
1521 | validate_comname (comname); | |
1522 | ||
afe4ca15 | 1523 | /* Look it up, and verify that we got an exact match. */ |
bd5635a1 | 1524 | c = lookup_cmd (&tem, cmdlist, "", -1, 1); |
afe4ca15 JG |
1525 | if (c && 0 != strcmp (comname, c->name)) |
1526 | c = 0; | |
1527 | ||
bd5635a1 RP |
1528 | if (c) |
1529 | { | |
1530 | if (c->class == class_user || c->class == class_alias) | |
1531 | tem = "Redefine command \"%s\"? "; | |
1532 | else | |
1533 | tem = "Really redefine built-in command \"%s\"? "; | |
1534 | if (!query (tem, comname)) | |
1535 | error ("Command \"%s\" not redefined.", comname); | |
1536 | } | |
1537 | ||
1538 | if (from_tty) | |
1539 | { | |
1540 | printf ("Type commands for definition of \"%s\".\n\ | |
1541 | End with a line saying just \"end\".\n", comname); | |
1542 | fflush (stdout); | |
1543 | } | |
1544 | comname = savestring (comname, strlen (comname)); | |
1545 | ||
1546 | cmds = read_command_lines (); | |
1547 | ||
1548 | if (c && c->class == class_user) | |
1549 | free_command_lines (&c->user_commands); | |
1550 | ||
1551 | newc = add_cmd (comname, class_user, not_just_help_class_command, | |
1552 | (c && c->class == class_user) | |
1553 | ? c->doc : savestring ("User-defined.", 13), &cmdlist); | |
1554 | newc->user_commands = cmds; | |
1555 | } | |
1556 | ||
1557 | static void | |
1558 | document_command (comname, from_tty) | |
1559 | char *comname; | |
1560 | int from_tty; | |
1561 | { | |
1562 | struct command_line *doclines; | |
1563 | register struct cmd_list_element *c; | |
1564 | char *tem = comname; | |
1565 | ||
1566 | validate_comname (comname); | |
1567 | ||
1568 | c = lookup_cmd (&tem, cmdlist, "", 0, 1); | |
1569 | ||
1570 | if (c->class != class_user) | |
1571 | error ("Command \"%s\" is built-in.", comname); | |
1572 | ||
1573 | if (from_tty) | |
1574 | printf ("Type documentation for \"%s\".\n\ | |
1575 | End with a line saying just \"end\".\n", comname); | |
1576 | ||
1577 | doclines = read_command_lines (); | |
1578 | ||
1579 | if (c->doc) free (c->doc); | |
1580 | ||
1581 | { | |
1582 | register struct command_line *cl1; | |
1583 | register int len = 0; | |
1584 | ||
1585 | for (cl1 = doclines; cl1; cl1 = cl1->next) | |
1586 | len += strlen (cl1->line) + 1; | |
1587 | ||
1588 | c->doc = (char *) xmalloc (len + 1); | |
1589 | *c->doc = 0; | |
1590 | ||
1591 | for (cl1 = doclines; cl1; cl1 = cl1->next) | |
1592 | { | |
1593 | strcat (c->doc, cl1->line); | |
1594 | if (cl1->next) | |
1595 | strcat (c->doc, "\n"); | |
1596 | } | |
1597 | } | |
1598 | ||
1599 | free_command_lines (&doclines); | |
1600 | } | |
1601 | \f | |
1602 | static void | |
81066208 | 1603 | print_gnu_advertisement() |
bd5635a1 | 1604 | { |
bd5635a1 | 1605 | printf ("\ |
bd5635a1 | 1606 | GDB is free software and you are welcome to distribute copies of it\n\ |
afe4ca15 JG |
1607 | under certain conditions; type \"show copying\" to see the conditions.\n\ |
1608 | There is absolutely no warranty for GDB; type \"show warranty\" for details.\n\ | |
81066208 JG |
1609 | "); |
1610 | } | |
1611 | ||
1612 | static void | |
1613 | print_gdb_version () | |
1614 | { | |
1615 | printf_filtered ("\ | |
1616 | GDB %s, Copyright 1991 Free Software Foundation, Inc.", | |
1617 | version); | |
bd5635a1 RP |
1618 | } |
1619 | ||
e1ce8aa5 | 1620 | /* ARGSUSED */ |
bd5635a1 | 1621 | static void |
f266e564 | 1622 | show_version (args, from_tty) |
bd5635a1 RP |
1623 | char *args; |
1624 | int from_tty; | |
1625 | { | |
1626 | immediate_quit++; | |
81066208 JG |
1627 | print_gnu_advertisement (); |
1628 | print_gdb_version (); | |
1629 | printf_filtered ("\n"); | |
bd5635a1 RP |
1630 | immediate_quit--; |
1631 | } | |
1632 | \f | |
1633 | /* xgdb calls this to reprint the usual GDB prompt. */ | |
1634 | ||
1635 | void | |
1636 | print_prompt () | |
1637 | { | |
1638 | printf ("%s", prompt); | |
1639 | fflush (stdout); | |
1640 | } | |
1641 | \f | |
1642 | static void | |
1643 | quit_command (args, from_tty) | |
1644 | char *args; | |
1645 | int from_tty; | |
1646 | { | |
f266e564 | 1647 | if (inferior_pid != 0 && target_has_execution) |
bd5635a1 RP |
1648 | { |
1649 | if (query ("The program is running. Quit anyway? ")) | |
1650 | { | |
1651 | target_kill (args, from_tty); | |
1652 | } | |
1653 | else | |
1654 | error ("Not confirmed."); | |
1655 | } | |
1656 | /* Save the history information if it is appropriate to do so. */ | |
1657 | if (write_history_p && history_filename) | |
1658 | write_history (history_filename); | |
1659 | exit (0); | |
1660 | } | |
1661 | ||
1662 | int | |
1663 | input_from_terminal_p () | |
1664 | { | |
1665 | return (instream == stdin) & caution; | |
1666 | } | |
1667 | \f | |
e1ce8aa5 | 1668 | /* ARGSUSED */ |
bd5635a1 RP |
1669 | static void |
1670 | pwd_command (args, from_tty) | |
1671 | char *args; | |
1672 | int from_tty; | |
1673 | { | |
1674 | if (args) error ("The \"pwd\" command does not take an argument: %s", args); | |
f7402c04 | 1675 | getcwd (dirbuf, sizeof (dirbuf)); |
bd5635a1 RP |
1676 | |
1677 | if (strcmp (dirbuf, current_directory)) | |
1678 | printf ("Working directory %s\n (canonically %s).\n", | |
1679 | current_directory, dirbuf); | |
1680 | else | |
1681 | printf ("Working directory %s.\n", current_directory); | |
1682 | } | |
1683 | ||
1684 | static void | |
1685 | cd_command (dir, from_tty) | |
1686 | char *dir; | |
1687 | int from_tty; | |
1688 | { | |
1689 | int len; | |
1690 | int change; | |
1691 | ||
9107291d JK |
1692 | /* If the new directory is absolute, repeat is a no-op; if relative, |
1693 | repeat might be useful but is more likely to be a mistake. */ | |
1694 | dont_repeat (); | |
1695 | ||
bd5635a1 RP |
1696 | if (dir == 0) |
1697 | error_no_arg ("new working directory"); | |
1698 | ||
1699 | dir = tilde_expand (dir); | |
1700 | make_cleanup (free, dir); | |
1701 | ||
1702 | len = strlen (dir); | |
1703 | dir = savestring (dir, len - (len > 1 && dir[len-1] == '/')); | |
1704 | if (dir[0] == '/') | |
1705 | current_directory = dir; | |
1706 | else | |
1707 | { | |
7d9884b9 | 1708 | current_directory = concat (current_directory, "/", dir, NULL); |
bd5635a1 RP |
1709 | free (dir); |
1710 | } | |
1711 | ||
1712 | /* Now simplify any occurrences of `.' and `..' in the pathname. */ | |
1713 | ||
1714 | change = 1; | |
1715 | while (change) | |
1716 | { | |
1717 | char *p; | |
1718 | change = 0; | |
1719 | ||
1720 | for (p = current_directory; *p;) | |
1721 | { | |
1722 | if (!strncmp (p, "/./", 2) | |
1723 | && (p[2] == 0 || p[2] == '/')) | |
1724 | strcpy (p, p + 2); | |
1725 | else if (!strncmp (p, "/..", 3) | |
1726 | && (p[3] == 0 || p[3] == '/') | |
1727 | && p != current_directory) | |
1728 | { | |
1729 | char *q = p; | |
1730 | while (q != current_directory && q[-1] != '/') q--; | |
1731 | if (q != current_directory) | |
1732 | { | |
1733 | strcpy (q-1, p+3); | |
1734 | p = q-1; | |
1735 | } | |
1736 | } | |
1737 | else p++; | |
1738 | } | |
1739 | } | |
1740 | ||
1741 | if (chdir (dir) < 0) | |
1742 | perror_with_name (dir); | |
1743 | ||
1744 | forget_cached_source_info (); | |
1745 | ||
1746 | if (from_tty) | |
1747 | pwd_command ((char *) 0, 1); | |
1748 | } | |
1749 | \f | |
e1ce8aa5 | 1750 | /* ARGSUSED */ |
bd5635a1 RP |
1751 | static void |
1752 | source_command (args, from_tty) | |
1753 | char *args; | |
1754 | int from_tty; | |
1755 | { | |
1756 | FILE *stream; | |
1757 | struct cleanup *cleanups; | |
1758 | char *file = args; | |
1759 | ||
1760 | if (file == 0) | |
1761 | /* Let source without arguments read .gdbinit. */ | |
1762 | file = gdbinit; | |
1763 | ||
1764 | file = tilde_expand (file); | |
1765 | make_cleanup (free, file); | |
1766 | ||
1767 | stream = fopen (file, "r"); | |
1768 | if (stream == 0) | |
1769 | perror_with_name (file); | |
1770 | ||
1771 | cleanups = make_cleanup (fclose, stream); | |
1772 | ||
1773 | read_command_file (stream); | |
1774 | ||
1775 | do_cleanups (cleanups); | |
1776 | } | |
1777 | ||
1778 | /* ARGSUSED */ | |
1779 | static void | |
1780 | echo_command (text, from_tty) | |
1781 | char *text; | |
1782 | int from_tty; | |
1783 | { | |
1784 | char *p = text; | |
1785 | register int c; | |
1786 | ||
1787 | if (text) | |
1788 | while (c = *p++) | |
1789 | { | |
1790 | if (c == '\\') | |
1791 | { | |
1792 | /* \ at end of argument is used after spaces | |
1793 | so they won't be lost. */ | |
1794 | if (*p == 0) | |
1795 | return; | |
1796 | ||
1797 | c = parse_escape (&p); | |
1798 | if (c >= 0) | |
afe4ca15 | 1799 | printf_filtered ("%c", c); |
bd5635a1 RP |
1800 | } |
1801 | else | |
afe4ca15 | 1802 | printf_filtered ("%c", c); |
bd5635a1 | 1803 | } |
afe4ca15 JG |
1804 | |
1805 | /* Force this output to appear now. */ | |
1806 | wrap_here (""); | |
f266e564 | 1807 | fflush (stdout); |
bd5635a1 RP |
1808 | } |
1809 | ||
1810 | /* ARGSUSED */ | |
1811 | static void | |
1812 | dump_me_command (args, from_tty) | |
1813 | char *args; | |
1814 | int from_tty; | |
1815 | { | |
1816 | if (query ("Should GDB dump core? ")) | |
1817 | { | |
1818 | signal (SIGQUIT, SIG_DFL); | |
1819 | kill (getpid (), SIGQUIT); | |
1820 | } | |
1821 | } | |
1822 | \f | |
1823 | /* Functions to manipulate command line editing control variables. */ | |
1824 | ||
f266e564 | 1825 | /* Number of commands to print in each call to show_commands. */ |
bd5635a1 RP |
1826 | #define Hist_print 10 |
1827 | static void | |
f266e564 | 1828 | show_commands (args, from_tty) |
bd5635a1 RP |
1829 | char *args; |
1830 | int from_tty; | |
1831 | { | |
1832 | /* Index for history commands. Relative to history_base. */ | |
1833 | int offset; | |
1834 | ||
1835 | /* Number of the history entry which we are planning to display next. | |
1836 | Relative to history_base. */ | |
1837 | static int num = 0; | |
1838 | ||
1839 | /* The first command in the history which doesn't exist (i.e. one more | |
1840 | than the number of the last command). Relative to history_base. */ | |
1841 | int hist_len; | |
1842 | ||
1843 | struct _hist_entry *history_get(); | |
1844 | extern int history_base; | |
1845 | ||
1846 | #if 0 | |
1847 | /* This is all reported by individual "show" commands. */ | |
1848 | printf_filtered ("Interactive command editing is %s.\n", | |
1849 | command_editing_p ? "on" : "off"); | |
1850 | ||
1851 | printf_filtered ("History expansion of command input is %s.\n", | |
1852 | history_expansion_p ? "on" : "off"); | |
1853 | printf_filtered ("Writing of a history record upon exit is %s.\n", | |
1854 | write_history_p ? "enabled" : "disabled"); | |
1855 | printf_filtered ("The size of the history list (number of stored commands) is %d.\n", | |
1856 | history_size); | |
1857 | printf_filtered ("The name of the history record is \"%s\".\n\n", | |
1858 | history_filename ? history_filename : ""); | |
1859 | #endif /* 0 */ | |
1860 | ||
1861 | /* Print out some of the commands from the command history. */ | |
1862 | /* First determine the length of the history list. */ | |
1863 | hist_len = history_size; | |
1864 | for (offset = 0; offset < history_size; offset++) | |
1865 | { | |
1866 | if (!history_get (history_base + offset)) | |
1867 | { | |
1868 | hist_len = offset; | |
1869 | break; | |
1870 | } | |
1871 | } | |
1872 | ||
1873 | if (args) | |
1874 | { | |
1875 | if (args[0] == '+' && args[1] == '\0') | |
1876 | /* "info editing +" should print from the stored position. */ | |
1877 | ; | |
1878 | else | |
1879 | /* "info editing <exp>" should print around command number <exp>. */ | |
1880 | num = (parse_and_eval_address (args) - history_base) - Hist_print / 2; | |
1881 | } | |
1882 | /* "info editing" means print the last Hist_print commands. */ | |
1883 | else | |
1884 | { | |
1885 | num = hist_len - Hist_print; | |
1886 | } | |
1887 | ||
1888 | if (num < 0) | |
1889 | num = 0; | |
1890 | ||
1891 | /* If there are at least Hist_print commands, we want to display the last | |
1892 | Hist_print rather than, say, the last 6. */ | |
1893 | if (hist_len - num < Hist_print) | |
1894 | { | |
1895 | num = hist_len - Hist_print; | |
1896 | if (num < 0) | |
1897 | num = 0; | |
1898 | } | |
1899 | ||
1900 | #if 0 | |
1901 | /* No need for a header now that "info editing" only prints one thing. */ | |
1902 | if (num == hist_len - Hist_print) | |
1903 | printf_filtered ("The list of the last %d commands is:\n\n", Hist_print); | |
1904 | else | |
1905 | printf_filtered ("Some of the stored commands are:\n\n"); | |
1906 | #endif /* 0 */ | |
1907 | ||
1908 | for (offset = num; offset < num + Hist_print && offset < hist_len; offset++) | |
1909 | { | |
1910 | printf_filtered ("%5d %s\n", history_base + offset, | |
1911 | (history_get (history_base + offset))->line); | |
1912 | } | |
1913 | ||
1914 | /* The next command we want to display is the next one that we haven't | |
1915 | displayed yet. */ | |
1916 | num += Hist_print; | |
1917 | ||
1918 | /* If the user repeats this command with return, it should do what | |
1919 | "info editing +" does. This is unnecessary if arg is null, | |
1920 | because "info editing +" is not useful after "info editing". */ | |
1921 | if (from_tty && args) | |
1922 | { | |
1923 | args[0] = '+'; | |
1924 | args[1] = '\0'; | |
1925 | } | |
1926 | } | |
1927 | ||
1928 | /* Called by do_setshow_command. */ | |
e1ce8aa5 | 1929 | /* ARGSUSED */ |
bd5635a1 RP |
1930 | static void |
1931 | set_history_size_command (args, from_tty, c) | |
1932 | char *args; | |
1933 | int from_tty; | |
1934 | struct cmd_list_element *c; | |
1935 | { | |
1936 | if (history_size == UINT_MAX) | |
1937 | unstifle_history (); | |
1938 | else | |
1939 | stifle_history (history_size); | |
1940 | } | |
1941 | ||
e1ce8aa5 | 1942 | /* ARGSUSED */ |
bd5635a1 RP |
1943 | static void |
1944 | set_history (args, from_tty) | |
1945 | char *args; | |
1946 | int from_tty; | |
1947 | { | |
1948 | printf ("\"set history\" must be followed by the name of a history subcommand.\n"); | |
1949 | help_list (sethistlist, "set history ", -1, stdout); | |
1950 | } | |
1951 | ||
e1ce8aa5 | 1952 | /* ARGSUSED */ |
bd5635a1 RP |
1953 | static void |
1954 | show_history (args, from_tty) | |
1955 | char *args; | |
1956 | int from_tty; | |
1957 | { | |
f266e564 | 1958 | cmd_show_list (showhistlist, from_tty, ""); |
bd5635a1 RP |
1959 | } |
1960 | ||
1961 | int info_verbose = 0; /* Default verbose msgs off */ | |
1962 | ||
1963 | /* Called by do_setshow_command. An elaborate joke. */ | |
e1ce8aa5 | 1964 | /* ARGSUSED */ |
bd5635a1 RP |
1965 | static void |
1966 | set_verbose (args, from_tty, c) | |
1967 | char *args; | |
1968 | int from_tty; | |
1969 | struct cmd_list_element *c; | |
1970 | { | |
1971 | char *cmdname = "verbose"; | |
1972 | struct cmd_list_element *showcmd; | |
1973 | ||
1974 | showcmd = lookup_cmd_1 (&cmdname, showlist, NULL, 1); | |
1975 | ||
1976 | if (info_verbose) | |
1977 | { | |
1978 | c->doc = "Set verbose printing of informational messages."; | |
1979 | showcmd->doc = "Show verbose printing of informational messages."; | |
1980 | } | |
1981 | else | |
1982 | { | |
1983 | c->doc = "Set verbosity."; | |
1984 | showcmd->doc = "Show verbosity."; | |
1985 | } | |
1986 | } | |
1987 | ||
1988 | static void | |
1989 | float_handler () | |
1990 | { | |
1991 | /* This message is based on ANSI C, section 4.7. Note that integer | |
1992 | divide by zero causes this, so "float" is a misnomer. */ | |
1993 | error ("Erroneous arithmetic operation."); | |
1994 | } | |
1995 | ||
1996 | /* Return whether we are running a batch file or from terminal. */ | |
1997 | int | |
1998 | batch_mode () | |
1999 | { | |
2000 | return !(instream == stdin && ISATTY (stdin)); | |
2001 | } | |
2002 | ||
2003 | \f | |
2004 | static void | |
2005 | initialize_cmd_lists () | |
2006 | { | |
2007 | cmdlist = (struct cmd_list_element *) 0; | |
2008 | infolist = (struct cmd_list_element *) 0; | |
2009 | enablelist = (struct cmd_list_element *) 0; | |
2010 | disablelist = (struct cmd_list_element *) 0; | |
2011 | deletelist = (struct cmd_list_element *) 0; | |
2012 | enablebreaklist = (struct cmd_list_element *) 0; | |
2013 | setlist = (struct cmd_list_element *) 0; | |
2014 | showlist = NULL; | |
2015 | sethistlist = (struct cmd_list_element *) 0; | |
2016 | showhistlist = NULL; | |
2017 | unsethistlist = (struct cmd_list_element *) 0; | |
2018 | } | |
2019 | ||
8b3c897a SG |
2020 | /* Init the history buffer. Note that we are called after the init file(s) |
2021 | * have been read so that the user can change the history file via his | |
2022 | * .gdbinit file (for instance). The GDBHISTFILE environment variable | |
2023 | * overrides all of this. | |
2024 | */ | |
2025 | ||
bd5635a1 | 2026 | static void |
8b3c897a | 2027 | initialize_history() |
bd5635a1 | 2028 | { |
bd5635a1 | 2029 | char *tmpenv; |
bd5635a1 | 2030 | |
bd5635a1 RP |
2031 | if (tmpenv = getenv ("HISTSIZE")) |
2032 | history_size = atoi (tmpenv); | |
8b3c897a | 2033 | else if (!history_size) |
bd5635a1 RP |
2034 | history_size = 256; |
2035 | ||
2036 | stifle_history (history_size); | |
2037 | ||
2038 | if (tmpenv = getenv ("GDBHISTFILE")) | |
2039 | history_filename = savestring (tmpenv, strlen(tmpenv)); | |
8b3c897a | 2040 | else if (!history_filename) { |
bd5635a1 RP |
2041 | /* We include the current directory so that if the user changes |
2042 | directories the file written will be the same as the one | |
2043 | that was read. */ | |
7d9884b9 | 2044 | history_filename = concat (current_directory, "/.gdb_history", NULL); |
8b3c897a | 2045 | } |
bd5635a1 | 2046 | read_history (history_filename); |
8b3c897a | 2047 | } |
bd5635a1 | 2048 | |
8b3c897a SG |
2049 | static void |
2050 | initialize_main () | |
2051 | { | |
2052 | struct cmd_list_element *c; | |
2053 | ||
2054 | #ifdef DEFAULT_PROMPT | |
2055 | prompt = savestring (DEFAULT_PROMPT, strlen(DEFAULT_PROMPT)); | |
2056 | #else | |
2057 | prompt = savestring ("(gdb) ", 6); | |
2058 | #endif | |
2059 | ||
2060 | /* Set the important stuff up for command editing. */ | |
2061 | command_editing_p = 1; | |
2062 | history_expansion_p = 0; | |
2063 | write_history_p = 0; | |
2064 | ||
bd5635a1 RP |
2065 | /* Setup important stuff for command line editing. */ |
2066 | rl_completion_entry_function = (int (*)()) symbol_completion_function; | |
2067 | rl_completer_word_break_characters = gdb_completer_word_break_characters; | |
2068 | rl_readline_name = "gdb"; | |
2069 | ||
2070 | /* Define the classes of commands. | |
2071 | They will appear in the help list in the reverse of this order. */ | |
2072 | ||
2073 | add_cmd ("obscure", class_obscure, NO_FUNCTION, "Obscure features.", &cmdlist); | |
2074 | add_cmd ("aliases", class_alias, NO_FUNCTION, "Aliases of other commands.", &cmdlist); | |
2075 | add_cmd ("user-defined", class_user, NO_FUNCTION, "User-defined commands.\n\ | |
2076 | The commands in this class are those defined by the user.\n\ | |
2077 | Use the \"define\" command to define a command.", &cmdlist); | |
2078 | add_cmd ("support", class_support, NO_FUNCTION, "Support facilities.", &cmdlist); | |
2079 | add_cmd ("status", class_info, NO_FUNCTION, "Status inquiries.", &cmdlist); | |
2080 | add_cmd ("files", class_files, NO_FUNCTION, "Specifying and examining files.", &cmdlist); | |
2081 | add_cmd ("breakpoints", class_breakpoint, NO_FUNCTION, "Making program stop at certain points.", &cmdlist); | |
2082 | add_cmd ("data", class_vars, NO_FUNCTION, "Examining data.", &cmdlist); | |
2083 | add_cmd ("stack", class_stack, NO_FUNCTION, "Examining the stack.\n\ | |
2084 | The stack is made up of stack frames. Gdb assigns numbers to stack frames\n\ | |
2085 | counting from zero for the innermost (currently executing) frame.\n\n\ | |
2086 | At any time gdb identifies one frame as the \"selected\" frame.\n\ | |
2087 | Variable lookups are done with respect to the selected frame.\n\ | |
2088 | When the program being debugged stops, gdb selects the innermost frame.\n\ | |
2089 | The commands below can be used to select other frames by number or address.", | |
2090 | &cmdlist); | |
2091 | add_cmd ("running", class_run, NO_FUNCTION, "Running the program.", &cmdlist); | |
2092 | ||
2093 | add_com ("pwd", class_files, pwd_command, | |
2094 | "Print working directory. This is used for your program as well."); | |
2095 | add_com ("cd", class_files, cd_command, | |
2096 | "Set working directory to DIR for debugger and program being debugged.\n\ | |
2097 | The change does not take effect for the program being debugged\n\ | |
2098 | until the next time it is started."); | |
2099 | ||
2100 | add_show_from_set | |
2101 | (add_set_cmd ("prompt", class_support, var_string, (char *)&prompt, | |
2102 | "Set gdb's prompt", | |
2103 | &setlist), | |
2104 | &showlist); | |
2105 | ||
2106 | add_com ("echo", class_support, echo_command, | |
2107 | "Print a constant string. Give string as argument.\n\ | |
2108 | C escape sequences may be used in the argument.\n\ | |
2109 | No newline is added at the end of the argument;\n\ | |
2110 | use \"\\n\" if you want a newline to be printed.\n\ | |
2111 | Since leading and trailing whitespace are ignored in command arguments,\n\ | |
2112 | if you want to print some you must use \"\\\" before leading whitespace\n\ | |
2113 | to be printed or after trailing whitespace."); | |
2114 | add_com ("document", class_support, document_command, | |
2115 | "Document a user-defined command.\n\ | |
2116 | Give command name as argument. Give documentation on following lines.\n\ | |
2117 | End with a line of just \"end\"."); | |
2118 | add_com ("define", class_support, define_command, | |
2119 | "Define a new command name. Command name is argument.\n\ | |
2120 | Definition appears on following lines, one command per line.\n\ | |
2121 | End with a line of just \"end\".\n\ | |
2122 | Use the \"document\" command to give documentation for the new command.\n\ | |
2123 | Commands defined in this way do not take arguments."); | |
2124 | ||
2125 | #ifdef __STDC__ | |
2126 | add_com ("source", class_support, source_command, | |
2127 | "Read commands from a file named FILE.\n\ | |
2128 | Note that the file \"" GDBINIT_FILENAME "\" is read automatically in this way\n\ | |
2129 | when gdb is started."); | |
2130 | #else | |
2131 | /* Punt file name, we can't help it easily. */ | |
2132 | add_com ("source", class_support, source_command, | |
2133 | "Read commands from a file named FILE.\n\ | |
2134 | Note that the file \".gdbinit\" is read automatically in this way\n\ | |
2135 | when gdb is started."); | |
2136 | #endif | |
2137 | ||
2138 | add_com ("quit", class_support, quit_command, "Exit gdb."); | |
2139 | add_com ("help", class_support, help_command, "Print list of commands."); | |
2140 | add_com_alias ("q", "quit", class_support, 1); | |
2141 | add_com_alias ("h", "help", class_support, 1); | |
2142 | ||
2143 | ||
2144 | c = add_set_cmd ("verbose", class_support, var_boolean, (char *)&info_verbose, | |
2145 | "Set ", | |
2146 | &setlist), | |
2147 | add_show_from_set (c, &showlist); | |
2148 | c->function = set_verbose; | |
2149 | set_verbose (NULL, 0, c); | |
2150 | ||
2151 | add_com ("dump-me", class_obscure, dump_me_command, | |
2152 | "Get fatal error; make debugger dump its core."); | |
2153 | ||
2154 | add_show_from_set | |
2155 | (add_set_cmd ("editing", class_support, var_boolean, (char *)&command_editing_p, | |
2156 | "Set command line editing.\n\ | |
2157 | Use \"on\" to enable to enable the editing, and \"off\" to disable it.\n\ | |
2158 | Without an argument, command line editing is enabled.", &setlist), | |
2159 | &showlist); | |
2160 | ||
2161 | add_prefix_cmd ("history", class_support, set_history, | |
2162 | "Generic command for setting command history parameters.", | |
2163 | &sethistlist, "set history ", 0, &setlist); | |
2164 | add_prefix_cmd ("history", class_support, show_history, | |
2165 | "Generic command for showing command history parameters.", | |
2166 | &showhistlist, "show history ", 0, &showlist); | |
2167 | ||
2168 | add_show_from_set | |
2169 | (add_set_cmd ("expansion", no_class, var_boolean, (char *)&history_expansion_p, | |
2170 | "Set history expansion on command input.\n\ | |
2171 | Without an argument, history expansion is enabled.", &sethistlist), | |
2172 | &showhistlist); | |
2173 | ||
2174 | add_show_from_set | |
f266e564 | 2175 | (add_set_cmd ("save", no_class, var_boolean, (char *)&write_history_p, |
bd5635a1 RP |
2176 | "Set saving of the history record on exit.\n\ |
2177 | Use \"on\" to enable to enable the saving, and \"off\" to disable it.\n\ | |
2178 | Without an argument, saving is enabled.", &sethistlist), | |
2179 | &showhistlist); | |
2180 | ||
2181 | c = add_set_cmd ("size", no_class, var_uinteger, (char *)&history_size, | |
2182 | "Set the size of the command history, \n\ | |
2183 | ie. the number of previous commands to keep a record of.", &sethistlist); | |
2184 | add_show_from_set (c, &showhistlist); | |
2185 | c->function = set_history_size_command; | |
2186 | ||
2187 | add_show_from_set | |
2188 | (add_set_cmd ("filename", no_class, var_filename, (char *)&history_filename, | |
2189 | "Set the filename in which to record the command history\n\ | |
2190 | (the list of previous commands of which a record is kept).", &sethistlist), | |
2191 | &showhistlist); | |
2192 | ||
2193 | add_show_from_set | |
f266e564 | 2194 | (add_set_cmd ("confirm", class_support, var_boolean, |
bd5635a1 | 2195 | (char *)&caution, |
f266e564 JK |
2196 | "Set whether to confirm potentially dangerous operations.", |
2197 | &setlist), | |
bd5635a1 RP |
2198 | &showlist); |
2199 | ||
2200 | add_prefix_cmd ("info", class_info, info_command, | |
2201 | "Generic command for printing status.", | |
2202 | &infolist, "info ", 0, &cmdlist); | |
2203 | add_com_alias ("i", "info", class_info, 1); | |
2204 | ||
2205 | add_prefix_cmd ("show", class_info, show_command, | |
2206 | "Generic command for showing things set with \"set\".", | |
2207 | &showlist, "show ", 0, &cmdlist); | |
2208 | /* Another way to get at the same thing. */ | |
2209 | add_info ("set", show_command, "Show all GDB settings."); | |
2210 | ||
f266e564 JK |
2211 | add_cmd ("commands", no_class, show_commands, "Status of command editor.", |
2212 | &showlist); | |
bd5635a1 | 2213 | |
f266e564 JK |
2214 | add_cmd ("version", no_class, show_version, |
2215 | "Report what version of GDB this is.", &showlist); | |
bd5635a1 | 2216 | } |