Commit | Line | Data |
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172559ec | 1 | /* Top level stuff for GDB, the GNU debugger. |
16041d53 | 2 | Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995 |
172559ec JK |
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 | ||
e3be225e SS |
59 | extern void initialize_targets PARAMS ((void)); |
60 | ||
61 | extern void initialize_utils PARAMS ((void)); | |
62 | ||
172559ec JK |
63 | /* Prototypes for local functions */ |
64 | ||
9ed8604f PS |
65 | static char * line_completion_function PARAMS ((char *, int, char *, int)); |
66 | ||
67 | static char * readline_line_completion_function PARAMS ((char *, int)); | |
172559ec | 68 | |
e52bfe0c | 69 | static void command_loop_marker PARAMS ((int)); |
172559ec | 70 | |
e52bfe0c | 71 | static void while_command PARAMS ((char *, int)); |
172559ec | 72 | |
e52bfe0c | 73 | static void if_command PARAMS ((char *, int)); |
172559ec | 74 | |
e52bfe0c JL |
75 | static struct command_line * |
76 | build_command_line PARAMS ((enum command_control_type, char *)); | |
172559ec | 77 | |
e52bfe0c JL |
78 | static struct command_line * |
79 | get_command_line PARAMS ((enum command_control_type, char *)); | |
172559ec | 80 | |
e52bfe0c | 81 | static void realloc_body_list PARAMS ((struct command_line *, int)); |
172559ec | 82 | |
e52bfe0c | 83 | static enum misc_command_type read_next_line PARAMS ((struct command_line **)); |
172559ec | 84 | |
e52bfe0c JL |
85 | static enum command_control_type |
86 | recurse_read_control_structure PARAMS ((struct command_line *)); | |
172559ec | 87 | |
0f8cdd9b JL |
88 | static struct cleanup * setup_user_args PARAMS ((char *)); |
89 | ||
90 | static char * locate_arg PARAMS ((char *)); | |
91 | ||
92 | static char * insert_args PARAMS ((char *)); | |
93 | ||
94 | static void arg_cleanup PARAMS ((void)); | |
95 | ||
e52bfe0c | 96 | static void init_main PARAMS ((void)); |
172559ec | 97 | |
e52bfe0c | 98 | static void init_cmd_lists PARAMS ((void)); |
172559ec | 99 | |
e52bfe0c | 100 | static void float_handler PARAMS ((int)); |
172559ec | 101 | |
e52bfe0c | 102 | static void init_signals PARAMS ((void)); |
172559ec | 103 | |
e52bfe0c | 104 | static void set_verbose PARAMS ((char *, int, struct cmd_list_element *)); |
172559ec | 105 | |
b8176214 ILT |
106 | #ifdef TARGET_BYTE_ORDER_SELECTABLE |
107 | ||
108 | static void set_endian PARAMS ((char *, int)); | |
109 | ||
110 | static void set_endian_big PARAMS ((char *, int)); | |
111 | ||
112 | static void set_endian_little PARAMS ((char *, int)); | |
113 | ||
b83ed019 ILT |
114 | static void set_endian_auto PARAMS ((char *, int)); |
115 | ||
b8176214 ILT |
116 | static void show_endian PARAMS ((char *, int)); |
117 | ||
118 | #endif | |
119 | ||
e52bfe0c | 120 | static void show_history PARAMS ((char *, int)); |
172559ec | 121 | |
e52bfe0c | 122 | static void set_history PARAMS ((char *, int)); |
172559ec | 123 | |
e52bfe0c JL |
124 | static void set_history_size_command PARAMS ((char *, int, |
125 | struct cmd_list_element *)); | |
172559ec | 126 | |
e52bfe0c | 127 | static void show_commands PARAMS ((char *, int)); |
172559ec | 128 | |
e52bfe0c | 129 | static void echo_command PARAMS ((char *, int)); |
172559ec | 130 | |
e52bfe0c | 131 | static void pwd_command PARAMS ((char *, int)); |
172559ec | 132 | |
e52bfe0c | 133 | static void show_version PARAMS ((char *, int)); |
172559ec | 134 | |
e52bfe0c | 135 | static void document_command PARAMS ((char *, int)); |
172559ec | 136 | |
e52bfe0c | 137 | static void define_command PARAMS ((char *, int)); |
172559ec | 138 | |
e52bfe0c JL |
139 | static void validate_comname PARAMS ((char *)); |
140 | ||
141 | static void help_command PARAMS ((char *, int)); | |
142 | ||
143 | static void show_command PARAMS ((char *, int)); | |
144 | ||
145 | static void info_command PARAMS ((char *, int)); | |
146 | ||
147 | static void complete_command PARAMS ((char *, int)); | |
148 | ||
149 | static void do_nothing PARAMS ((int)); | |
150 | ||
151 | static int quit_cover PARAMS ((char *)); | |
152 | ||
153 | static void disconnect PARAMS ((int)); | |
154 | ||
155 | static void source_cleanup PARAMS ((FILE *)); | |
172559ec JK |
156 | |
157 | /* If this definition isn't overridden by the header files, assume | |
158 | that isatty and fileno exist on this system. */ | |
159 | #ifndef ISATTY | |
160 | #define ISATTY(FP) (isatty (fileno (FP))) | |
161 | #endif | |
162 | ||
163 | /* Initialization file name for gdb. This is overridden in some configs. */ | |
164 | ||
165 | #ifndef GDBINIT_FILENAME | |
166 | #define GDBINIT_FILENAME ".gdbinit" | |
167 | #endif | |
168 | char gdbinit[] = GDBINIT_FILENAME; | |
f22661ee | 169 | |
172559ec JK |
170 | int inhibit_gdbinit = 0; |
171 | ||
f22661ee SS |
172 | /* If nonzero, and GDB has been configured to be able to use windows, |
173 | attempt to open them upon startup. */ | |
754e5da2 | 174 | |
f22661ee | 175 | int use_windows = 1; |
754e5da2 | 176 | |
172559ec JK |
177 | /* Version number of GDB, as a string. */ |
178 | ||
179 | extern char *version; | |
180 | ||
181 | /* Canonical host name as a string. */ | |
182 | ||
183 | extern char *host_name; | |
184 | ||
185 | /* Canonical target name as a string. */ | |
186 | ||
187 | extern char *target_name; | |
188 | ||
189 | extern char lang_frame_mismatch_warn[]; /* language.c */ | |
190 | ||
191 | /* Flag for whether we want all the "from_tty" gubbish printed. */ | |
192 | ||
193 | int caution = 1; /* Default is yes, sigh. */ | |
194 | ||
f22661ee | 195 | /* Define all cmd_list_elements. */ |
172559ec JK |
196 | |
197 | /* Chain containing all defined commands. */ | |
198 | ||
199 | struct cmd_list_element *cmdlist; | |
200 | ||
201 | /* Chain containing all defined info subcommands. */ | |
202 | ||
203 | struct cmd_list_element *infolist; | |
204 | ||
205 | /* Chain containing all defined enable subcommands. */ | |
206 | ||
207 | struct cmd_list_element *enablelist; | |
208 | ||
209 | /* Chain containing all defined disable subcommands. */ | |
210 | ||
211 | struct cmd_list_element *disablelist; | |
212 | ||
213 | /* Chain containing all defined delete subcommands. */ | |
214 | ||
215 | struct cmd_list_element *deletelist; | |
216 | ||
217 | /* Chain containing all defined "enable breakpoint" subcommands. */ | |
218 | ||
219 | struct cmd_list_element *enablebreaklist; | |
220 | ||
221 | /* Chain containing all defined set subcommands */ | |
222 | ||
223 | struct cmd_list_element *setlist; | |
224 | ||
225 | /* Chain containing all defined unset subcommands */ | |
226 | ||
227 | struct cmd_list_element *unsetlist; | |
228 | ||
229 | /* Chain containing all defined show subcommands. */ | |
230 | ||
231 | struct cmd_list_element *showlist; | |
232 | ||
b8176214 ILT |
233 | #ifdef TARGET_BYTE_ORDER_SELECTABLE |
234 | /* Chain containing the \"set endian\" commands. */ | |
235 | ||
236 | struct cmd_list_element *endianlist; | |
237 | #endif | |
238 | ||
172559ec JK |
239 | /* Chain containing all defined \"set history\". */ |
240 | ||
241 | struct cmd_list_element *sethistlist; | |
242 | ||
243 | /* Chain containing all defined \"show history\". */ | |
244 | ||
245 | struct cmd_list_element *showhistlist; | |
246 | ||
247 | /* Chain containing all defined \"unset history\". */ | |
248 | ||
249 | struct cmd_list_element *unsethistlist; | |
250 | ||
251 | /* Chain containing all defined maintenance subcommands. */ | |
252 | ||
253 | #if MAINTENANCE_CMDS | |
254 | struct cmd_list_element *maintenancelist; | |
255 | #endif | |
256 | ||
257 | /* Chain containing all defined "maintenance info" subcommands. */ | |
258 | ||
259 | #if MAINTENANCE_CMDS | |
260 | struct cmd_list_element *maintenanceinfolist; | |
261 | #endif | |
262 | ||
263 | /* Chain containing all defined "maintenance print" subcommands. */ | |
264 | ||
265 | #if MAINTENANCE_CMDS | |
266 | struct cmd_list_element *maintenanceprintlist; | |
267 | #endif | |
268 | ||
269 | struct cmd_list_element *setprintlist; | |
270 | ||
271 | struct cmd_list_element *showprintlist; | |
272 | ||
273 | struct cmd_list_element *setchecklist; | |
274 | ||
275 | struct cmd_list_element *showchecklist; | |
276 | ||
277 | /* stdio stream that command input is being read from. Set to stdin normally. | |
278 | Set by source_command to the file we are sourcing. Set to NULL if we are | |
279 | executing a user-defined command. */ | |
280 | ||
281 | FILE *instream; | |
282 | ||
283 | /* Current working directory. */ | |
284 | ||
285 | char *current_directory; | |
286 | ||
287 | /* The directory name is actually stored here (usually). */ | |
b7ec5b8d | 288 | char gdb_dirbuf[1024]; |
172559ec JK |
289 | |
290 | /* Function to call before reading a command, if nonzero. | |
291 | The function receives two args: an input stream, | |
292 | and a prompt string. */ | |
293 | ||
294 | void (*window_hook) PARAMS ((FILE *, char *)); | |
295 | ||
296 | int epoch_interface; | |
297 | int xgdb_verbose; | |
298 | ||
299 | /* gdb prints this when reading a command interactively */ | |
300 | static char *prompt; | |
301 | ||
302 | /* Buffer used for reading command lines, and the size | |
303 | allocated for it so far. */ | |
304 | ||
305 | char *line; | |
306 | int linesize = 100; | |
307 | ||
308 | /* Nonzero if the current command is modified by "server ". This | |
309 | affects things like recording into the command history, comamnds | |
310 | repeating on RETURN, etc. This is so a user interface (emacs, GUI, | |
311 | whatever) can issue its own commands and also send along commands | |
312 | from the user, and have the user not notice that the user interface | |
313 | is issuing commands too. */ | |
314 | int server_command; | |
315 | ||
316 | /* Baud rate specified for talking to serial target systems. Default | |
317 | is left as -1, so targets can choose their own defaults. */ | |
318 | /* FIXME: This means that "show remotebaud" and gr_files_info can print -1 | |
319 | or (unsigned int)-1. This is a Bad User Interface. */ | |
320 | ||
321 | int baud_rate = -1; | |
322 | ||
323 | /* Non-zero tells remote* modules to output debugging info. */ | |
324 | ||
325 | int remote_debug = 0; | |
326 | ||
e52bfe0c JL |
327 | /* Level of control structure. */ |
328 | static int control_level; | |
329 | ||
0f8cdd9b JL |
330 | /* Structure for arguments to user defined functions. */ |
331 | #define MAXUSERARGS 10 | |
332 | struct user_args | |
333 | { | |
334 | struct user_args *next; | |
335 | struct | |
336 | { | |
337 | char *arg; | |
338 | int len; | |
339 | } a[MAXUSERARGS]; | |
340 | int count; | |
341 | } *user_args; | |
342 | ||
172559ec JK |
343 | /* Signal to catch ^Z typed while reading a command: SIGTSTP or SIGCONT. */ |
344 | ||
345 | #ifndef STOP_SIGNAL | |
346 | #ifdef SIGTSTP | |
347 | #define STOP_SIGNAL SIGTSTP | |
348 | static void stop_sig PARAMS ((int)); | |
349 | #endif | |
350 | #endif | |
351 | ||
352 | /* Some System V have job control but not sigsetmask(). */ | |
353 | #if !defined (HAVE_SIGSETMASK) | |
354 | #if !defined (USG) | |
355 | #define HAVE_SIGSETMASK 1 | |
356 | #else | |
357 | #define HAVE_SIGSETMASK 0 | |
358 | #endif | |
359 | #endif | |
360 | ||
361 | #if 0 == (HAVE_SIGSETMASK) | |
362 | #define sigsetmask(n) | |
363 | #endif | |
8164ec2e SG |
364 | |
365 | /* Hooks for alternate command interfaces. */ | |
366 | ||
367 | /* Called after most modules have been initialized, but before taking users | |
368 | command file. */ | |
369 | ||
370 | void (*init_ui_hook) PARAMS ((void)); | |
371 | ||
372 | /* Called instead of command_loop at top level. Can be invoked via | |
373 | return_to_top_level. */ | |
374 | ||
375 | void (*command_loop_hook) PARAMS ((void)); | |
376 | ||
377 | /* Called instead of fputs for all output. */ | |
378 | ||
86db943c | 379 | void (*fputs_unfiltered_hook) PARAMS ((const char *linebuffer, FILE *stream)); |
8164ec2e SG |
380 | |
381 | /* Called from print_frame_info to list the line we stopped in. */ | |
382 | ||
383 | void (*print_frame_info_listing_hook) PARAMS ((struct symtab *s, int line, | |
384 | int stopline, int noerror)); | |
385 | /* Replaces most of query. */ | |
386 | ||
387 | int (*query_hook) PARAMS (()); | |
388 | ||
389 | /* Called from gdb_flush to flush output. */ | |
390 | ||
391 | void (*flush_hook) PARAMS ((FILE *stream)); | |
392 | ||
393 | /* Called as appropriate to notify the interface of the specified breakpoint | |
394 | conditions. */ | |
395 | ||
637b1661 | 396 | void (*create_breakpoint_hook) PARAMS ((struct breakpoint *bpt)); |
8164ec2e | 397 | void (*delete_breakpoint_hook) PARAMS ((struct breakpoint *bpt)); |
6131622e | 398 | void (*modify_breakpoint_hook) PARAMS ((struct breakpoint *bpt)); |
637b1661 SG |
399 | |
400 | /* Called during long calculations to allow GUI to repair window damage, and to | |
401 | check for stop buttons, etc... */ | |
402 | ||
403 | void (*interactive_hook) PARAMS ((void)); | |
404 | ||
16041d53 SC |
405 | /* Called when the registers have changed, as a hint to a GUI |
406 | to minimize window update. */ | |
407 | ||
408 | void (*registers_changed_hook) PARAMS ((void)); | |
409 | ||
479f0f18 SG |
410 | /* Called when going to wait for the target. Usually allows the GUI to run |
411 | while waiting for target events. */ | |
412 | ||
413 | int (*target_wait_hook) PARAMS ((int pid, struct target_waitstatus *status)); | |
414 | ||
415 | /* Used by UI as a wrapper around command execution. May do various things | |
416 | like enabling/disabling buttons, etc... */ | |
417 | ||
418 | void (*call_command_hook) PARAMS ((struct cmd_list_element *c, char *cmd, | |
419 | int from_tty)); | |
86db943c SG |
420 | |
421 | /* Takes control from error (). Typically used to prevent longjmps out of the | |
422 | middle of the GUI. Usually used in conjunction with a catch routine. */ | |
423 | ||
424 | NORETURN void (*error_hook) PARAMS (()); | |
425 | ||
172559ec JK |
426 | \f |
427 | /* Where to go for return_to_top_level (RETURN_ERROR). */ | |
428 | jmp_buf error_return; | |
429 | /* Where to go for return_to_top_level (RETURN_QUIT). */ | |
430 | jmp_buf quit_return; | |
431 | ||
432 | /* Return for reason REASON. This generally gets back to the command | |
433 | loop, but can be caught via catch_errors. */ | |
434 | ||
435 | NORETURN void | |
436 | return_to_top_level (reason) | |
437 | enum return_reason reason; | |
438 | { | |
439 | quit_flag = 0; | |
440 | immediate_quit = 0; | |
441 | ||
442 | /* Perhaps it would be cleaner to do this via the cleanup chain (not sure | |
443 | I can think of a reason why that is vital, though). */ | |
444 | bpstat_clear_actions(stop_bpstat); /* Clear queued breakpoint commands */ | |
445 | ||
446 | disable_current_display (); | |
447 | do_cleanups (ALL_CLEANUPS); | |
448 | ||
449 | if (annotation_level > 1) | |
450 | switch (reason) | |
451 | { | |
452 | case RETURN_QUIT: | |
453 | annotate_quit (); | |
454 | break; | |
455 | case RETURN_ERROR: | |
456 | annotate_error (); | |
457 | break; | |
458 | } | |
459 | ||
460 | (NORETURN void) longjmp | |
461 | (reason == RETURN_ERROR ? error_return : quit_return, 1); | |
462 | } | |
463 | ||
464 | /* Call FUNC with arg ARGS, catching any errors. If there is no | |
465 | error, return the value returned by FUNC. If there is an error, | |
466 | print ERRSTRING, print the specific error message, then return | |
467 | zero. | |
468 | ||
469 | Must not be called with immediate_quit in effect (bad things might | |
470 | happen, say we got a signal in the middle of a memcpy to quit_return). | |
471 | This is an OK restriction; with very few exceptions immediate_quit can | |
472 | be replaced by judicious use of QUIT. | |
473 | ||
474 | MASK specifies what to catch; it is normally set to | |
475 | RETURN_MASK_ALL, if for no other reason than that the code which | |
476 | calls catch_errors might not be set up to deal with a quit which | |
477 | isn't caught. But if the code can deal with it, it generally | |
478 | should be RETURN_MASK_ERROR, unless for some reason it is more | |
479 | useful to abort only the portion of the operation inside the | |
480 | catch_errors. Note that quit should return to the command line | |
481 | fairly quickly, even if some further processing is being done. */ | |
482 | ||
483 | int | |
484 | catch_errors (func, args, errstring, mask) | |
485 | int (*func) PARAMS ((char *)); | |
486 | PTR args; | |
487 | char *errstring; | |
488 | return_mask mask; | |
489 | { | |
490 | jmp_buf saved_error; | |
491 | jmp_buf saved_quit; | |
492 | jmp_buf tmp_jmp; | |
493 | int val; | |
494 | struct cleanup *saved_cleanup_chain; | |
495 | char *saved_error_pre_print; | |
496 | ||
497 | saved_cleanup_chain = save_cleanups (); | |
498 | saved_error_pre_print = error_pre_print; | |
499 | ||
500 | if (mask & RETURN_MASK_ERROR) | |
501 | memcpy ((char *)saved_error, (char *)error_return, sizeof (jmp_buf)); | |
502 | if (mask & RETURN_MASK_QUIT) | |
503 | memcpy (saved_quit, quit_return, sizeof (jmp_buf)); | |
504 | error_pre_print = errstring; | |
505 | ||
506 | if (setjmp (tmp_jmp) == 0) | |
507 | { | |
508 | if (mask & RETURN_MASK_ERROR) | |
509 | memcpy (error_return, tmp_jmp, sizeof (jmp_buf)); | |
510 | if (mask & RETURN_MASK_QUIT) | |
511 | memcpy (quit_return, tmp_jmp, sizeof (jmp_buf)); | |
512 | val = (*func) (args); | |
513 | } | |
514 | else | |
515 | val = 0; | |
516 | ||
517 | restore_cleanups (saved_cleanup_chain); | |
518 | ||
519 | error_pre_print = saved_error_pre_print; | |
520 | if (mask & RETURN_MASK_ERROR) | |
521 | memcpy (error_return, saved_error, sizeof (jmp_buf)); | |
522 | if (mask & RETURN_MASK_QUIT) | |
523 | memcpy (quit_return, saved_quit, sizeof (jmp_buf)); | |
524 | return val; | |
525 | } | |
526 | ||
527 | /* Handler for SIGHUP. */ | |
528 | ||
529 | static void | |
530 | disconnect (signo) | |
531 | int signo; | |
532 | { | |
533 | catch_errors (quit_cover, NULL, | |
534 | "Could not kill the program being debugged", RETURN_MASK_ALL); | |
535 | signal (SIGHUP, SIG_DFL); | |
536 | kill (getpid (), SIGHUP); | |
537 | } | |
538 | ||
539 | /* Just a little helper function for disconnect(). */ | |
540 | ||
541 | static int | |
542 | quit_cover (s) | |
543 | char *s; | |
544 | { | |
545 | caution = 0; /* Throw caution to the wind -- we're exiting. | |
546 | This prevents asking the user dumb questions. */ | |
547 | quit_command((char *)0, 0); | |
548 | return 0; | |
549 | } | |
550 | \f | |
551 | /* Line number we are currently in in a file which is being sourced. */ | |
552 | static int source_line_number; | |
553 | ||
554 | /* Name of the file we are sourcing. */ | |
555 | static char *source_file_name; | |
556 | ||
557 | /* Buffer containing the error_pre_print used by the source stuff. | |
558 | Malloc'd. */ | |
559 | static char *source_error; | |
560 | static int source_error_allocated; | |
561 | ||
562 | /* Something to glom on to the start of error_pre_print if source_file_name | |
563 | is set. */ | |
564 | static char *source_pre_error; | |
565 | ||
566 | /* Clean up on error during a "source" command (or execution of a | |
567 | user-defined command). */ | |
568 | ||
569 | static void | |
570 | source_cleanup (stream) | |
571 | FILE *stream; | |
572 | { | |
573 | /* Restore the previous input stream. */ | |
574 | instream = stream; | |
575 | } | |
576 | ||
577 | /* Read commands from STREAM. */ | |
578 | void | |
579 | read_command_file (stream) | |
580 | FILE *stream; | |
581 | { | |
582 | struct cleanup *cleanups; | |
583 | ||
584 | cleanups = make_cleanup (source_cleanup, instream); | |
585 | instream = stream; | |
586 | command_loop (); | |
587 | do_cleanups (cleanups); | |
588 | } | |
589 | \f | |
590 | extern void init_proc (); | |
591 | ||
43ab4ba5 SS |
592 | void (*pre_init_ui_hook) PARAMS ((void)); |
593 | ||
172559ec JK |
594 | void |
595 | gdb_init () | |
596 | { | |
43ab4ba5 SS |
597 | if (pre_init_ui_hook) |
598 | pre_init_ui_hook (); | |
599 | ||
172559ec JK |
600 | /* Run the init function of each source file */ |
601 | ||
b7ec5b8d FF |
602 | getcwd (gdb_dirbuf, sizeof (gdb_dirbuf)); |
603 | current_directory = gdb_dirbuf; | |
f36b58b1 | 604 | |
172559ec | 605 | init_cmd_lists (); /* This needs to be done first */ |
754e5da2 SG |
606 | initialize_targets (); /* Setup target_terminal macros for utils.c */ |
607 | initialize_utils (); /* Make errors and warnings possible */ | |
172559ec JK |
608 | initialize_all_files (); |
609 | init_main (); /* But that omits this file! Do it now */ | |
610 | init_signals (); | |
611 | ||
612 | init_proc (); | |
613 | ||
614 | /* We need a default language for parsing expressions, so simple things like | |
615 | "set width 0" won't fail if no language is explicitly set in a config file | |
616 | or implicitly set by reading an executable during startup. */ | |
617 | set_language (language_c); | |
618 | expected_language = current_language; /* don't warn about the change. */ | |
754e5da2 SG |
619 | |
620 | if (init_ui_hook) | |
621 | init_ui_hook (); | |
172559ec JK |
622 | } |
623 | ||
e52bfe0c JL |
624 | /* Allocate, initialize a new command line structure for one of the |
625 | control commands (if/while). */ | |
626 | ||
627 | static struct command_line * | |
628 | build_command_line (type, args) | |
629 | enum command_control_type type; | |
630 | char *args; | |
631 | { | |
632 | struct command_line *cmd; | |
633 | ||
634 | cmd = (struct command_line *)xmalloc (sizeof (struct command_line)); | |
635 | cmd->next = NULL; | |
636 | cmd->control_type = type; | |
637 | ||
638 | cmd->body_count = 1; | |
639 | cmd->body_list | |
640 | = (struct command_line **)xmalloc (sizeof (struct command_line *) | |
641 | * cmd->body_count); | |
642 | memset (cmd->body_list, 0, sizeof (struct command_line *) * cmd->body_count); | |
643 | cmd->line = savestring (args, strlen (args)); | |
644 | return cmd; | |
645 | } | |
646 | ||
647 | /* Build and return a new command structure for the control commands | |
648 | such as "if" and "while". */ | |
649 | ||
650 | static struct command_line * | |
651 | get_command_line (type, arg) | |
652 | enum command_control_type type; | |
653 | char *arg; | |
654 | { | |
655 | struct command_line *cmd; | |
656 | struct cleanup *old_chain = NULL; | |
657 | ||
658 | /* Allocate and build a new command line structure. */ | |
659 | cmd = build_command_line (type, arg); | |
660 | ||
661 | old_chain = make_cleanup (free_command_lines, &cmd); | |
662 | ||
663 | /* Read in the body of this command. */ | |
664 | if (recurse_read_control_structure (cmd) == invalid_control) | |
665 | { | |
666 | warning ("error reading in control structure\n"); | |
667 | do_cleanups (old_chain); | |
668 | return NULL; | |
669 | } | |
670 | ||
671 | discard_cleanups (old_chain); | |
672 | return cmd; | |
673 | } | |
674 | ||
0f8cdd9b JL |
675 | /* Recursively print a command (including full control structures). */ |
676 | void | |
677 | print_command_line (cmd, depth) | |
678 | struct command_line *cmd; | |
679 | unsigned int depth; | |
680 | { | |
681 | unsigned int i; | |
682 | ||
683 | if (depth) | |
684 | { | |
685 | for (i = 0; i < depth; i++) | |
686 | fputs_filtered (" ", gdb_stdout); | |
687 | } | |
688 | ||
689 | /* A simple command, print it and return. */ | |
690 | if (cmd->control_type == simple_control) | |
691 | { | |
692 | fputs_filtered (cmd->line, gdb_stdout); | |
693 | fputs_filtered ("\n", gdb_stdout); | |
694 | return; | |
695 | } | |
696 | ||
697 | /* loop_continue to jump to the start of a while loop, print it | |
698 | and return. */ | |
699 | if (cmd->control_type == continue_control) | |
700 | { | |
701 | fputs_filtered ("loop_continue\n", gdb_stdout); | |
702 | return; | |
703 | } | |
704 | ||
705 | /* loop_break to break out of a while loop, print it and return. */ | |
706 | if (cmd->control_type == break_control) | |
707 | { | |
708 | fputs_filtered ("loop_break\n", gdb_stdout); | |
709 | return; | |
710 | } | |
711 | ||
712 | /* A while command. Recursively print its subcommands before returning. */ | |
713 | if (cmd->control_type == while_control) | |
714 | { | |
715 | struct command_line *list; | |
716 | fputs_filtered ("while ", gdb_stdout); | |
717 | fputs_filtered (cmd->line, gdb_stdout); | |
718 | fputs_filtered ("\n", gdb_stdout); | |
719 | list = *cmd->body_list; | |
720 | while (list) | |
721 | { | |
722 | print_command_line (list, depth + 1); | |
723 | list = list->next; | |
724 | } | |
725 | } | |
726 | ||
727 | /* An if command. Recursively print both arms before returning. */ | |
728 | if (cmd->control_type == if_control) | |
729 | { | |
730 | fputs_filtered ("if ", gdb_stdout); | |
731 | fputs_filtered (cmd->line, gdb_stdout); | |
732 | fputs_filtered ("\n", gdb_stdout); | |
733 | /* The true arm. */ | |
734 | print_command_line (cmd->body_list[0], depth + 1); | |
735 | ||
736 | /* Show the false arm if it exists. */ | |
737 | if (cmd->body_count == 2) | |
738 | { | |
739 | if (depth) | |
740 | { | |
741 | for (i = 0; i < depth; i++) | |
742 | fputs_filtered (" ", gdb_stdout); | |
743 | } | |
744 | fputs_filtered ("else\n", gdb_stdout); | |
745 | print_command_line (cmd->body_list[1], depth + 1); | |
746 | } | |
747 | if (depth) | |
748 | { | |
749 | for (i = 0; i < depth; i++) | |
750 | fputs_filtered (" ", gdb_stdout); | |
751 | } | |
752 | fputs_filtered ("end\n", gdb_stdout); | |
753 | } | |
754 | } | |
755 | ||
e52bfe0c JL |
756 | /* Execute the command in CMD. */ |
757 | ||
0f8cdd9b | 758 | enum command_control_type |
e52bfe0c JL |
759 | execute_control_command (cmd) |
760 | struct command_line *cmd; | |
761 | { | |
762 | struct expression *expr; | |
763 | struct command_line *current; | |
764 | struct cleanup *old_chain = 0; | |
e52bfe0c JL |
765 | value_ptr val; |
766 | int loop; | |
767 | enum command_control_type ret; | |
0f8cdd9b | 768 | char *new_line; |
e52bfe0c JL |
769 | |
770 | switch (cmd->control_type) | |
771 | { | |
772 | case simple_control: | |
773 | /* A simple command, execute it and return. */ | |
0f8cdd9b JL |
774 | new_line = insert_args (cmd->line); |
775 | if (!new_line) | |
776 | return invalid_control; | |
777 | old_chain = make_cleanup (free_current_contents, &new_line); | |
778 | execute_command (new_line, 0); | |
779 | ret = cmd->control_type; | |
780 | break; | |
e52bfe0c JL |
781 | |
782 | case continue_control: | |
783 | case break_control: | |
784 | /* Return for "continue", and "break" so we can either | |
785 | continue the loop at the top, or break out. */ | |
0f8cdd9b JL |
786 | ret = cmd->control_type; |
787 | break; | |
e52bfe0c JL |
788 | |
789 | case while_control: | |
790 | { | |
791 | /* Parse the loop control expression for the while statement. */ | |
0f8cdd9b JL |
792 | new_line = insert_args (cmd->line); |
793 | if (!new_line) | |
794 | return invalid_control; | |
795 | old_chain = make_cleanup (free_current_contents, &new_line); | |
796 | expr = parse_expression (new_line); | |
797 | make_cleanup (free_current_contents, &expr); | |
798 | ||
e52bfe0c JL |
799 | ret = simple_control; |
800 | loop = true; | |
801 | ||
802 | /* Keep iterating so long as the expression is true. */ | |
803 | while (loop == true) | |
804 | { | |
805 | /* Evaluate the expression. */ | |
806 | val = evaluate_expression (expr); | |
807 | ||
808 | /* If the value is false, then break out of the loop. */ | |
809 | if (!value_true (val)) | |
810 | break; | |
811 | ||
812 | /* Execute the body of the while statement. */ | |
813 | current = *cmd->body_list; | |
814 | while (current) | |
815 | { | |
816 | ret = execute_control_command (current); | |
817 | ||
818 | /* If we got an error, or a "break" command, then stop | |
819 | looping. */ | |
820 | if (ret == invalid_control || ret == break_control) | |
821 | { | |
822 | loop = false; | |
823 | break; | |
824 | } | |
825 | ||
826 | /* If we got a "continue" command, then restart the loop | |
827 | at this point. */ | |
828 | if (ret == continue_control) | |
829 | break; | |
830 | ||
831 | /* Get the next statement. */ | |
832 | current = current->next; | |
833 | } | |
834 | } | |
835 | ||
836 | /* Reset RET so that we don't recurse the break all the way down. */ | |
837 | if (ret == break_control) | |
838 | ret = simple_control; | |
839 | ||
840 | break; | |
841 | } | |
842 | ||
843 | case if_control: | |
844 | { | |
0f8cdd9b JL |
845 | new_line = insert_args (cmd->line); |
846 | if (!new_line) | |
847 | return invalid_control; | |
848 | old_chain = make_cleanup (free_current_contents, &new_line); | |
e52bfe0c | 849 | /* Parse the conditional for the if statement. */ |
0f8cdd9b JL |
850 | expr = parse_expression (new_line); |
851 | make_cleanup (free_current_contents, &expr); | |
e52bfe0c JL |
852 | |
853 | current = NULL; | |
854 | ret = simple_control; | |
855 | ||
856 | /* Evaluate the conditional. */ | |
857 | val = evaluate_expression (expr); | |
858 | ||
859 | /* Choose which arm to take commands from based on the value of the | |
860 | conditional expression. */ | |
861 | if (value_true (val)) | |
862 | current = *cmd->body_list; | |
863 | else if (cmd->body_count == 2) | |
864 | current = *(cmd->body_list + 1); | |
865 | ||
866 | /* Execute commands in the given arm. */ | |
867 | while (current) | |
868 | { | |
869 | ret = execute_control_command (current); | |
870 | ||
871 | /* If we got an error, get out. */ | |
872 | if (ret != simple_control) | |
873 | break; | |
874 | ||
875 | /* Get the next statement in the body. */ | |
876 | current = current->next; | |
877 | } | |
0f8cdd9b | 878 | |
e52bfe0c JL |
879 | break; |
880 | } | |
881 | ||
882 | default: | |
883 | warning ("Invalid control type in command structure."); | |
884 | return invalid_control; | |
885 | } | |
886 | ||
887 | if (old_chain) | |
888 | do_cleanups (old_chain); | |
889 | ||
890 | return ret; | |
891 | } | |
892 | ||
893 | /* "while" command support. Executes a body of statements while the | |
894 | loop condition is nonzero. */ | |
895 | ||
896 | static void | |
897 | while_command (arg, from_tty) | |
898 | char *arg; | |
899 | int from_tty; | |
900 | { | |
901 | struct command_line *command = NULL; | |
902 | ||
903 | control_level = 1; | |
904 | command = get_command_line (while_control, arg); | |
905 | ||
906 | if (command == NULL) | |
907 | return; | |
908 | ||
909 | execute_control_command (command); | |
910 | free_command_lines (&command); | |
911 | } | |
912 | ||
913 | /* "if" command support. Execute either the true or false arm depending | |
914 | on the value of the if conditional. */ | |
915 | ||
916 | static void | |
917 | if_command (arg, from_tty) | |
918 | char *arg; | |
919 | int from_tty; | |
920 | { | |
921 | struct command_line *command = NULL; | |
922 | ||
923 | control_level = 1; | |
924 | command = get_command_line (if_control, arg); | |
925 | ||
926 | if (command == NULL) | |
927 | return; | |
928 | ||
929 | execute_control_command (command); | |
930 | free_command_lines (&command); | |
931 | } | |
932 | ||
0f8cdd9b JL |
933 | /* Cleanup */ |
934 | static void | |
935 | arg_cleanup () | |
936 | { | |
937 | struct user_args *oargs = user_args; | |
938 | if (!user_args) | |
939 | fatal ("Internal error, arg_cleanup called with no user args.\n"); | |
940 | ||
941 | user_args = user_args->next; | |
942 | free (oargs); | |
943 | } | |
944 | ||
945 | /* Bind the incomming arguments for a user defined command to | |
946 | $arg0, $arg1 ... $argMAXUSERARGS. */ | |
947 | ||
948 | static struct cleanup * | |
949 | setup_user_args (p) | |
950 | char *p; | |
951 | { | |
952 | struct user_args *args; | |
953 | struct cleanup *old_chain; | |
954 | unsigned int arg_count = 0; | |
955 | ||
956 | args = (struct user_args *)xmalloc (sizeof (struct user_args)); | |
957 | memset (args, 0, sizeof (struct user_args)); | |
958 | ||
959 | args->next = user_args; | |
960 | user_args = args; | |
961 | ||
962 | old_chain = make_cleanup (arg_cleanup, 0); | |
963 | ||
964 | if (p == NULL) | |
965 | return old_chain; | |
966 | ||
967 | while (*p) | |
968 | { | |
969 | char *start_arg; | |
970 | ||
971 | if (arg_count >= MAXUSERARGS) | |
972 | { | |
973 | error ("user defined function may only have %d arguments.\n", | |
974 | MAXUSERARGS); | |
975 | return old_chain; | |
976 | } | |
977 | ||
978 | /* Strip whitespace. */ | |
979 | while (*p == ' ' || *p == '\t') | |
980 | p++; | |
981 | ||
982 | /* P now points to an argument. */ | |
983 | start_arg = p; | |
984 | user_args->a[arg_count].arg = p; | |
985 | ||
986 | /* Get to the end of this argument. */ | |
987 | while (*p && *p != ' ' && *p != '\t') | |
988 | p++; | |
989 | ||
990 | user_args->a[arg_count].len = p - start_arg; | |
991 | arg_count++; | |
992 | user_args->count++; | |
993 | } | |
994 | return old_chain; | |
995 | } | |
996 | ||
997 | /* Given character string P, return a point to the first argument ($arg), | |
998 | or NULL if P contains no arguments. */ | |
999 | ||
1000 | static char * | |
1001 | locate_arg (p) | |
1002 | char *p; | |
1003 | { | |
e3be225e | 1004 | while ((p = strchr (p, '$'))) |
0f8cdd9b JL |
1005 | { |
1006 | if (strncmp (p, "$arg", 4) == 0 && isdigit (p[4])) | |
1007 | return p; | |
1008 | p++; | |
1009 | } | |
1010 | return NULL; | |
1011 | } | |
1012 | ||
1013 | /* Insert the user defined arguments stored in user_arg into the $arg | |
1014 | arguments found in line, with the updated copy being placed into nline. */ | |
1015 | ||
1016 | static char * | |
1017 | insert_args (line) | |
1018 | char *line; | |
1019 | { | |
1020 | char *p, *save_line, *new_line; | |
1021 | unsigned len, i; | |
1022 | ||
1023 | /* First we need to know how much memory to allocate for the new line. */ | |
1024 | save_line = line; | |
1025 | len = 0; | |
e3be225e | 1026 | while ((p = locate_arg (line))) |
0f8cdd9b JL |
1027 | { |
1028 | len += p - line; | |
1029 | i = p[4] - '0'; | |
1030 | ||
1031 | if (i >= user_args->count) | |
1032 | { | |
1033 | error ("Missing argument %d in user function.\n", i); | |
1034 | return NULL; | |
1035 | } | |
1036 | len += user_args->a[i].len; | |
1037 | line = p + 5; | |
1038 | } | |
1039 | ||
1040 | /* Don't forget the tail. */ | |
1041 | len += strlen (line); | |
1042 | ||
1043 | /* Allocate space for the new line and fill it in. */ | |
1044 | new_line = (char *)xmalloc (len + 1); | |
1045 | if (new_line == NULL) | |
1046 | return NULL; | |
1047 | ||
1048 | /* Restore pointer to beginning of old line. */ | |
1049 | line = save_line; | |
1050 | ||
1051 | /* Save pointer to beginning of new line. */ | |
1052 | save_line = new_line; | |
1053 | ||
e3be225e | 1054 | while ((p = locate_arg (line))) |
0f8cdd9b JL |
1055 | { |
1056 | int i, len; | |
1057 | ||
1058 | memcpy (new_line, line, p - line); | |
1059 | new_line += p - line; | |
1060 | i = p[4] - '0'; | |
1061 | ||
e3be225e SS |
1062 | len = user_args->a[i].len; |
1063 | if (len) | |
0f8cdd9b JL |
1064 | { |
1065 | memcpy (new_line, user_args->a[i].arg, len); | |
1066 | new_line += len; | |
1067 | } | |
1068 | line = p + 5; | |
1069 | } | |
1070 | /* Don't forget the tail. */ | |
1071 | strcpy (new_line, line); | |
1072 | ||
1073 | /* Return a pointer to the beginning of the new line. */ | |
1074 | return save_line; | |
1075 | } | |
1076 | ||
172559ec JK |
1077 | void |
1078 | execute_user_command (c, args) | |
1079 | struct cmd_list_element *c; | |
1080 | char *args; | |
1081 | { | |
1082 | register struct command_line *cmdlines; | |
1083 | struct cleanup *old_chain; | |
e52bfe0c JL |
1084 | enum command_control_type ret; |
1085 | ||
0f8cdd9b | 1086 | old_chain = setup_user_args (args); |
172559ec JK |
1087 | |
1088 | cmdlines = c->user_commands; | |
1089 | if (cmdlines == 0) | |
1090 | /* Null command */ | |
1091 | return; | |
1092 | ||
1093 | /* Set the instream to 0, indicating execution of a | |
1094 | user-defined function. */ | |
1095 | old_chain = make_cleanup (source_cleanup, instream); | |
1096 | instream = (FILE *) 0; | |
1097 | while (cmdlines) | |
1098 | { | |
e52bfe0c JL |
1099 | ret = execute_control_command (cmdlines); |
1100 | if (ret != simple_control && ret != break_control) | |
1101 | { | |
1102 | warning ("Error in control structure.\n"); | |
1103 | break; | |
1104 | } | |
172559ec JK |
1105 | cmdlines = cmdlines->next; |
1106 | } | |
1107 | do_cleanups (old_chain); | |
1108 | } | |
1109 | ||
1110 | /* Execute the line P as a command. | |
1111 | Pass FROM_TTY as second argument to the defining function. */ | |
1112 | ||
1113 | void | |
1114 | execute_command (p, from_tty) | |
1115 | char *p; | |
1116 | int from_tty; | |
1117 | { | |
1118 | register struct cmd_list_element *c; | |
1119 | register enum language flang; | |
1120 | static int warned = 0; | |
1121 | ||
1122 | free_all_values (); | |
1123 | ||
1124 | /* This can happen when command_line_input hits end of file. */ | |
1125 | if (p == NULL) | |
1126 | return; | |
e52bfe0c | 1127 | |
172559ec JK |
1128 | while (*p == ' ' || *p == '\t') p++; |
1129 | if (*p) | |
1130 | { | |
1131 | char *arg; | |
e52bfe0c | 1132 | |
172559ec JK |
1133 | c = lookup_cmd (&p, cmdlist, "", 0, 1); |
1134 | /* Pass null arg rather than an empty one. */ | |
1135 | arg = *p ? p : 0; | |
1136 | ||
1137 | /* If this command has been hooked, run the hook first. */ | |
1138 | if (c->hook) | |
1139 | execute_user_command (c->hook, (char *)0); | |
1140 | ||
1141 | if (c->class == class_user) | |
1142 | execute_user_command (c, arg); | |
1143 | else if (c->type == set_cmd || c->type == show_cmd) | |
1144 | do_setshow_command (arg, from_tty & caution, c); | |
1145 | else if (c->function.cfunc == NO_FUNCTION) | |
1146 | error ("That is not a command, just a help topic."); | |
479f0f18 SG |
1147 | else if (call_command_hook) |
1148 | call_command_hook (c, arg, from_tty & caution); | |
172559ec JK |
1149 | else |
1150 | (*c->function.cfunc) (arg, from_tty & caution); | |
1151 | } | |
1152 | ||
1153 | /* Tell the user if the language has changed (except first time). */ | |
1154 | if (current_language != expected_language) | |
1155 | { | |
1156 | if (language_mode == language_mode_auto) { | |
1157 | language_info (1); /* Print what changed. */ | |
1158 | } | |
1159 | warned = 0; | |
1160 | } | |
1161 | ||
1162 | /* Warn the user if the working language does not match the | |
1163 | language of the current frame. Only warn the user if we are | |
1164 | actually running the program, i.e. there is a stack. */ | |
1165 | /* FIXME: This should be cacheing the frame and only running when | |
1166 | the frame changes. */ | |
43ab4ba5 | 1167 | |
172559ec | 1168 | if (target_has_stack) |
172559ec | 1169 | { |
43ab4ba5 SS |
1170 | flang = get_frame_language (); |
1171 | if (!warned | |
1172 | && flang != language_unknown | |
1173 | && flang != current_language->la_language) | |
1174 | { | |
1175 | printf_filtered ("%s\n", lang_frame_mismatch_warn); | |
1176 | warned = 1; | |
1177 | } | |
172559ec | 1178 | } |
172559ec JK |
1179 | } |
1180 | ||
1181 | /* ARGSUSED */ | |
1182 | static void | |
1183 | command_loop_marker (foo) | |
1184 | int foo; | |
1185 | { | |
1186 | } | |
1187 | ||
1188 | /* Read commands from `instream' and execute them | |
1189 | until end of file or error reading instream. */ | |
43ab4ba5 | 1190 | |
172559ec JK |
1191 | void |
1192 | command_loop () | |
1193 | { | |
1194 | struct cleanup *old_chain; | |
1195 | char *command; | |
1196 | int stdin_is_tty = ISATTY (stdin); | |
43ab4ba5 | 1197 | long time_at_cmd_start; |
83ebf439 | 1198 | long space_at_cmd_start; |
43ab4ba5 SS |
1199 | extern int display_time; |
1200 | extern int display_space; | |
172559ec JK |
1201 | |
1202 | while (!feof (instream)) | |
1203 | { | |
1204 | if (window_hook && instream == stdin) | |
1205 | (*window_hook) (instream, prompt); | |
1206 | ||
1207 | quit_flag = 0; | |
1208 | if (instream == stdin && stdin_is_tty) | |
1209 | reinitialize_more_filter (); | |
1210 | old_chain = make_cleanup (command_loop_marker, 0); | |
1211 | command = command_line_input (instream == stdin ? prompt : (char *) NULL, | |
1212 | instream == stdin, "prompt"); | |
1213 | if (command == 0) | |
1214 | return; | |
43ab4ba5 SS |
1215 | |
1216 | time_at_cmd_start = get_run_time (); | |
1217 | ||
83ebf439 SS |
1218 | if (display_space) |
1219 | { | |
1220 | extern char **environ; | |
1221 | char *lim = (char *) sbrk (0); | |
1222 | ||
1223 | space_at_cmd_start = (long) (lim - (char *) &environ); | |
1224 | } | |
1225 | ||
172559ec JK |
1226 | execute_command (command, instream == stdin); |
1227 | /* Do any commands attached to breakpoint we stopped at. */ | |
1228 | bpstat_do_actions (&stop_bpstat); | |
1229 | do_cleanups (old_chain); | |
43ab4ba5 SS |
1230 | |
1231 | if (display_time) | |
1232 | { | |
1233 | long cmd_time = get_run_time () - time_at_cmd_start; | |
1234 | ||
1235 | printf_unfiltered ("Command execution time: %ld.%06ld\n", | |
1236 | cmd_time / 1000000, cmd_time % 1000000); | |
1237 | } | |
1238 | ||
1239 | if (display_space) | |
1240 | { | |
1241 | extern char **environ; | |
1242 | char *lim = (char *) sbrk (0); | |
83ebf439 SS |
1243 | long space_now = lim - (char *) &environ; |
1244 | long space_diff = space_now - space_at_cmd_start; | |
43ab4ba5 | 1245 | |
83ebf439 SS |
1246 | printf_unfiltered ("Space used: %ld (%c%ld for this command)\n", |
1247 | space_now, | |
1248 | (space_diff >= 0 ? '+' : '-'), | |
1249 | space_diff); | |
43ab4ba5 | 1250 | } |
172559ec JK |
1251 | } |
1252 | } | |
1253 | \f | |
1254 | /* Commands call this if they do not want to be repeated by null lines. */ | |
1255 | ||
1256 | void | |
1257 | dont_repeat () | |
1258 | { | |
1259 | if (server_command) | |
1260 | return; | |
1261 | ||
1262 | /* If we aren't reading from standard input, we are saving the last | |
1263 | thing read from stdin in line and don't want to delete it. Null lines | |
1264 | won't repeat here in any case. */ | |
1265 | if (instream == stdin) | |
1266 | *line = 0; | |
1267 | } | |
1268 | \f | |
1269 | /* Read a line from the stream "instream" without command line editing. | |
1270 | ||
1271 | It prints PRROMPT once at the start. | |
e52bfe0c | 1272 | Action is compatible with "readline", e.g. space for the result is |
172559ec JK |
1273 | malloc'd and should be freed by the caller. |
1274 | ||
1275 | A NULL return means end of file. */ | |
1276 | char * | |
1277 | gdb_readline (prrompt) | |
1278 | char *prrompt; | |
1279 | { | |
1280 | int c; | |
1281 | char *result; | |
1282 | int input_index = 0; | |
1283 | int result_size = 80; | |
1284 | ||
1285 | if (prrompt) | |
1286 | { | |
1287 | /* Don't use a _filtered function here. It causes the assumed | |
1288 | character position to be off, since the newline we read from | |
1289 | the user is not accounted for. */ | |
1290 | fputs_unfiltered (prrompt, gdb_stdout); | |
1291 | /* start-sanitize-mpw */ | |
1292 | #ifdef MPW | |
1293 | /* Move to a new line so the entered line doesn't have a prompt | |
1294 | on the front of it. */ | |
1295 | fputs_unfiltered ("\n", gdb_stdout); | |
1296 | #endif /* MPW */ | |
1297 | /* end-sanitize-mpw */ | |
1298 | gdb_flush (gdb_stdout); | |
1299 | } | |
e52bfe0c | 1300 | |
172559ec JK |
1301 | result = (char *) xmalloc (result_size); |
1302 | ||
1303 | while (1) | |
1304 | { | |
1305 | /* Read from stdin if we are executing a user defined command. | |
1306 | This is the right thing for prompt_for_continue, at least. */ | |
1307 | c = fgetc (instream ? instream : stdin); | |
1308 | ||
1309 | if (c == EOF) | |
1310 | { | |
1311 | if (input_index > 0) | |
1312 | /* The last line does not end with a newline. Return it, and | |
1313 | if we are called again fgetc will still return EOF and | |
1314 | we'll return NULL then. */ | |
1315 | break; | |
1316 | free (result); | |
1317 | return NULL; | |
1318 | } | |
1319 | ||
1320 | if (c == '\n') | |
1321 | break; | |
1322 | ||
1323 | result[input_index++] = c; | |
1324 | while (input_index >= result_size) | |
1325 | { | |
1326 | result_size *= 2; | |
1327 | result = (char *) xrealloc (result, result_size); | |
1328 | } | |
1329 | } | |
1330 | ||
1331 | result[input_index++] = '\0'; | |
1332 | return result; | |
1333 | } | |
1334 | ||
1335 | /* Variables which control command line editing and history | |
1336 | substitution. These variables are given default values at the end | |
1337 | of this file. */ | |
1338 | static int command_editing_p; | |
1339 | static int history_expansion_p; | |
1340 | static int write_history_p; | |
1341 | static int history_size; | |
1342 | static char *history_filename; | |
1343 | ||
1344 | /* readline uses the word breaks for two things: | |
1345 | (1) In figuring out where to point the TEXT parameter to the | |
1346 | rl_completion_entry_function. Since we don't use TEXT for much, | |
1347 | it doesn't matter a lot what the word breaks are for this purpose, but | |
1348 | it does affect how much stuff M-? lists. | |
1349 | (2) If one of the matches contains a word break character, readline | |
1350 | will quote it. That's why we switch between | |
1351 | gdb_completer_word_break_characters and | |
1352 | gdb_completer_command_word_break_characters. I'm not sure when | |
1353 | we need this behavior (perhaps for funky characters in C++ symbols?). */ | |
1354 | ||
1355 | /* Variables which are necessary for fancy command line editing. */ | |
1356 | char *gdb_completer_word_break_characters = | |
1357 | " \t\n!@#$%^&*()+=|~`}{[]\"';:?/>.<,-"; | |
1358 | ||
1359 | /* When completing on command names, we remove '-' from the list of | |
1360 | word break characters, since we use it in command names. If the | |
1361 | readline library sees one in any of the current completion strings, | |
1362 | it thinks that the string needs to be quoted and automatically supplies | |
1363 | a leading quote. */ | |
1364 | char *gdb_completer_command_word_break_characters = | |
1365 | " \t\n!@#$%^&*()+=|~`}{[]\"';:?/>.<,"; | |
1366 | ||
1367 | /* Characters that can be used to quote completion strings. Note that we | |
1368 | can't include '"' because the gdb C parser treats such quoted sequences | |
1369 | as strings. */ | |
1370 | char *gdb_completer_quote_characters = | |
1371 | "'"; | |
1372 | ||
1373 | /* Functions that are used as part of the fancy command line editing. */ | |
1374 | ||
1375 | /* This can be used for functions which don't want to complete on symbols | |
1376 | but don't want to complete on anything else either. */ | |
1377 | /* ARGSUSED */ | |
1378 | char ** | |
1379 | noop_completer (text, prefix) | |
1380 | char *text; | |
1381 | char *prefix; | |
1382 | { | |
1383 | return NULL; | |
1384 | } | |
1385 | ||
1386 | /* Complete on filenames. */ | |
1387 | char ** | |
1388 | filename_completer (text, word) | |
1389 | char *text; | |
1390 | char *word; | |
1391 | { | |
1392 | /* From readline. */ | |
1393 | extern char *filename_completion_function (); | |
1394 | int subsequent_name; | |
1395 | char **return_val; | |
1396 | int return_val_used; | |
1397 | int return_val_alloced; | |
1398 | ||
1399 | return_val_used = 0; | |
1400 | /* Small for testing. */ | |
1401 | return_val_alloced = 1; | |
1402 | return_val = (char **) xmalloc (return_val_alloced * sizeof (char *)); | |
1403 | ||
1404 | subsequent_name = 0; | |
1405 | while (1) | |
1406 | { | |
1407 | char *p; | |
1408 | p = filename_completion_function (text, subsequent_name); | |
1409 | if (return_val_used >= return_val_alloced) | |
1410 | { | |
1411 | return_val_alloced *= 2; | |
1412 | return_val = | |
1413 | (char **) xrealloc (return_val, | |
1414 | return_val_alloced * sizeof (char *)); | |
1415 | } | |
1416 | if (p == NULL) | |
1417 | { | |
1418 | return_val[return_val_used++] = p; | |
1419 | break; | |
1420 | } | |
1421 | /* Like emacs, don't complete on old versions. Especially useful | |
1422 | in the "source" command. */ | |
1423 | if (p[strlen (p) - 1] == '~') | |
1424 | continue; | |
1425 | ||
1426 | { | |
1427 | char *q; | |
1428 | if (word == text) | |
1429 | /* Return exactly p. */ | |
1430 | return_val[return_val_used++] = p; | |
1431 | else if (word > text) | |
1432 | { | |
1433 | /* Return some portion of p. */ | |
1434 | q = xmalloc (strlen (p) + 5); | |
1435 | strcpy (q, p + (word - text)); | |
1436 | return_val[return_val_used++] = q; | |
1437 | free (p); | |
1438 | } | |
1439 | else | |
1440 | { | |
1441 | /* Return some of TEXT plus p. */ | |
1442 | q = xmalloc (strlen (p) + (text - word) + 5); | |
1443 | strncpy (q, word, text - word); | |
1444 | q[text - word] = '\0'; | |
1445 | strcat (q, p); | |
1446 | return_val[return_val_used++] = q; | |
1447 | free (p); | |
1448 | } | |
1449 | } | |
1450 | subsequent_name = 1; | |
1451 | } | |
1452 | #if 0 | |
1453 | /* There is no way to do this just long enough to affect quote inserting | |
1454 | without also affecting the next completion. This should be fixed in | |
1455 | readline. FIXME. */ | |
1456 | /* Insure that readline does the right thing | |
1457 | with respect to inserting quotes. */ | |
1458 | rl_completer_word_break_characters = ""; | |
1459 | #endif | |
1460 | return return_val; | |
1461 | } | |
1462 | ||
1463 | /* Here are some useful test cases for completion. FIXME: These should | |
1464 | be put in the test suite. They should be tested with both M-? and TAB. | |
1465 | ||
1466 | "show output-" "radix" | |
1467 | "show output" "-radix" | |
1468 | "p" ambiguous (commands starting with p--path, print, printf, etc.) | |
1469 | "p " ambiguous (all symbols) | |
1470 | "info t foo" no completions | |
1471 | "info t " no completions | |
1472 | "info t" ambiguous ("info target", "info terminal", etc.) | |
1473 | "info ajksdlfk" no completions | |
1474 | "info ajksdlfk " no completions | |
1475 | "info" " " | |
1476 | "info " ambiguous (all info commands) | |
1477 | "p \"a" no completions (string constant) | |
1478 | "p 'a" ambiguous (all symbols starting with a) | |
1479 | "p b-a" ambiguous (all symbols starting with a) | |
1480 | "p b-" ambiguous (all symbols) | |
1481 | "file Make" "file" (word break hard to screw up here) | |
1482 | "file ../gdb.stabs/we" "ird" (needs to not break word at slash) | |
1483 | */ | |
1484 | ||
1485 | /* Generate completions one by one for the completer. Each time we are | |
9ed8604f PS |
1486 | called return another potential completion to the caller. |
1487 | line_completion just completes on commands or passes the buck to the | |
1488 | command's completer function, the stuff specific to symbol completion | |
172559ec JK |
1489 | is in make_symbol_completion_list. |
1490 | ||
9ed8604f | 1491 | TEXT is the caller's idea of the "word" we are looking at. |
172559ec JK |
1492 | |
1493 | MATCHES is the number of matches that have currently been collected from | |
1494 | calling this completion function. When zero, then we need to initialize, | |
1495 | otherwise the initialization has already taken place and we can just | |
1496 | return the next potential completion string. | |
1497 | ||
9ed8604f PS |
1498 | LINE_BUFFER is available to be looked at; it contains the entire text |
1499 | of the line. POINT is the offset in that line of the cursor. You | |
1500 | should pretend that the line ends at POINT. | |
172559ec | 1501 | |
9ed8604f PS |
1502 | Returns NULL if there are no more completions, else a pointer to a string |
1503 | which is a possible completion, it is the caller's responsibility to | |
1504 | free the string. */ | |
172559ec JK |
1505 | |
1506 | static char * | |
9ed8604f | 1507 | line_completion_function (text, matches, line_buffer, point) |
172559ec JK |
1508 | char *text; |
1509 | int matches; | |
9ed8604f PS |
1510 | char *line_buffer; |
1511 | int point; | |
172559ec JK |
1512 | { |
1513 | static char **list = (char **)NULL; /* Cache of completions */ | |
1514 | static int index; /* Next cached completion */ | |
1515 | char *output = NULL; | |
1516 | char *tmp_command, *p; | |
1517 | /* Pointer within tmp_command which corresponds to text. */ | |
1518 | char *word; | |
1519 | struct cmd_list_element *c, *result_list; | |
1520 | ||
1521 | if (matches == 0) | |
1522 | { | |
1523 | /* The caller is beginning to accumulate a new set of completions, so | |
1524 | we need to find all of them now, and cache them for returning one at | |
1525 | a time on future calls. */ | |
1526 | ||
1527 | if (list) | |
1528 | { | |
1529 | /* Free the storage used by LIST, but not by the strings inside. | |
1530 | This is because rl_complete_internal () frees the strings. */ | |
1531 | free ((PTR)list); | |
1532 | } | |
1533 | list = 0; | |
1534 | index = 0; | |
1535 | ||
1536 | /* Choose the default set of word break characters to break completions. | |
1537 | If we later find out that we are doing completions on command strings | |
1538 | (as opposed to strings supplied by the individual command completer | |
1539 | functions, which can be any string) then we will switch to the | |
1540 | special word break set for command strings, which leaves out the | |
1541 | '-' character used in some commands. */ | |
1542 | ||
1543 | rl_completer_word_break_characters = | |
1544 | gdb_completer_word_break_characters; | |
1545 | ||
1546 | /* Decide whether to complete on a list of gdb commands or on symbols. */ | |
9ed8604f | 1547 | tmp_command = (char *) alloca (point + 1); |
172559ec JK |
1548 | p = tmp_command; |
1549 | ||
9ed8604f PS |
1550 | strncpy (tmp_command, line_buffer, point); |
1551 | tmp_command[point] = '\0'; | |
172559ec | 1552 | /* Since text always contains some number of characters leading up |
9ed8604f | 1553 | to point, we can find the equivalent position in tmp_command |
172559ec | 1554 | by subtracting that many characters from the end of tmp_command. */ |
9ed8604f | 1555 | word = tmp_command + point - strlen (text); |
172559ec | 1556 | |
9ed8604f | 1557 | if (point == 0) |
172559ec JK |
1558 | { |
1559 | /* An empty line we want to consider ambiguous; that is, it | |
1560 | could be any command. */ | |
1561 | c = (struct cmd_list_element *) -1; | |
1562 | result_list = 0; | |
1563 | } | |
1564 | else | |
1565 | { | |
1566 | c = lookup_cmd_1 (&p, cmdlist, &result_list, 1); | |
1567 | } | |
1568 | ||
1569 | /* Move p up to the next interesting thing. */ | |
1570 | while (*p == ' ' || *p == '\t') | |
1571 | { | |
1572 | p++; | |
1573 | } | |
1574 | ||
1575 | if (!c) | |
1576 | { | |
1577 | /* It is an unrecognized command. So there are no | |
1578 | possible completions. */ | |
1579 | list = NULL; | |
1580 | } | |
1581 | else if (c == (struct cmd_list_element *) -1) | |
1582 | { | |
1583 | char *q; | |
1584 | ||
1585 | /* lookup_cmd_1 advances p up to the first ambiguous thing, but | |
1586 | doesn't advance over that thing itself. Do so now. */ | |
1587 | q = p; | |
1588 | while (*q && (isalnum (*q) || *q == '-' || *q == '_')) | |
1589 | ++q; | |
9ed8604f | 1590 | if (q != tmp_command + point) |
172559ec JK |
1591 | { |
1592 | /* There is something beyond the ambiguous | |
1593 | command, so there are no possible completions. For | |
1594 | example, "info t " or "info t foo" does not complete | |
1595 | to anything, because "info t" can be "info target" or | |
1596 | "info terminal". */ | |
1597 | list = NULL; | |
1598 | } | |
1599 | else | |
1600 | { | |
1601 | /* We're trying to complete on the command which was ambiguous. | |
1602 | This we can deal with. */ | |
1603 | if (result_list) | |
1604 | { | |
1605 | list = complete_on_cmdlist (*result_list->prefixlist, p, | |
1606 | word); | |
1607 | } | |
1608 | else | |
1609 | { | |
1610 | list = complete_on_cmdlist (cmdlist, p, word); | |
1611 | } | |
1612 | /* Insure that readline does the right thing with respect to | |
1613 | inserting quotes. */ | |
1614 | rl_completer_word_break_characters = | |
1615 | gdb_completer_command_word_break_characters; | |
1616 | } | |
1617 | } | |
1618 | else | |
1619 | { | |
1620 | /* We've recognized a full command. */ | |
1621 | ||
9ed8604f | 1622 | if (p == tmp_command + point) |
172559ec JK |
1623 | { |
1624 | /* There is no non-whitespace in the line beyond the command. */ | |
1625 | ||
1626 | if (p[-1] == ' ' || p[-1] == '\t') | |
1627 | { | |
1628 | /* The command is followed by whitespace; we need to complete | |
1629 | on whatever comes after command. */ | |
1630 | if (c->prefixlist) | |
1631 | { | |
1632 | /* It is a prefix command; what comes after it is | |
1633 | a subcommand (e.g. "info "). */ | |
1634 | list = complete_on_cmdlist (*c->prefixlist, p, word); | |
1635 | ||
1636 | /* Insure that readline does the right thing | |
1637 | with respect to inserting quotes. */ | |
1638 | rl_completer_word_break_characters = | |
1639 | gdb_completer_command_word_break_characters; | |
1640 | } | |
09374c98 SG |
1641 | else if (c->enums) |
1642 | { | |
1643 | list = complete_on_enum (c->enums, p, word); | |
1644 | rl_completer_word_break_characters = | |
1645 | gdb_completer_command_word_break_characters; | |
1646 | } | |
172559ec JK |
1647 | else |
1648 | { | |
1649 | /* It is a normal command; what comes after it is | |
1650 | completed by the command's completer function. */ | |
1651 | list = (*c->completer) (p, word); | |
1652 | } | |
1653 | } | |
1654 | else | |
1655 | { | |
1656 | /* The command is not followed by whitespace; we need to | |
1657 | complete on the command itself. e.g. "p" which is a | |
1658 | command itself but also can complete to "print", "ptype" | |
1659 | etc. */ | |
1660 | char *q; | |
1661 | ||
1662 | /* Find the command we are completing on. */ | |
1663 | q = p; | |
1664 | while (q > tmp_command) | |
1665 | { | |
1666 | if (isalnum (q[-1]) || q[-1] == '-' || q[-1] == '_') | |
1667 | --q; | |
1668 | else | |
1669 | break; | |
1670 | } | |
1671 | ||
1672 | list = complete_on_cmdlist (result_list, q, word); | |
1673 | ||
1674 | /* Insure that readline does the right thing | |
1675 | with respect to inserting quotes. */ | |
1676 | rl_completer_word_break_characters = | |
1677 | gdb_completer_command_word_break_characters; | |
1678 | } | |
1679 | } | |
1680 | else | |
1681 | { | |
1682 | /* There is non-whitespace beyond the command. */ | |
1683 | ||
1684 | if (c->prefixlist && !c->allow_unknown) | |
1685 | { | |
1686 | /* It is an unrecognized subcommand of a prefix command, | |
1687 | e.g. "info adsfkdj". */ | |
1688 | list = NULL; | |
1689 | } | |
09374c98 SG |
1690 | else if (c->enums) |
1691 | { | |
1692 | list = complete_on_enum (c->enums, p, word); | |
1693 | } | |
172559ec JK |
1694 | else |
1695 | { | |
1696 | /* It is a normal command. */ | |
1697 | list = (*c->completer) (p, word); | |
1698 | } | |
1699 | } | |
1700 | } | |
1701 | } | |
1702 | ||
1703 | /* If we found a list of potential completions during initialization then | |
1704 | dole them out one at a time. The vector of completions is NULL | |
1705 | terminated, so after returning the last one, return NULL (and continue | |
1706 | to do so) each time we are called after that, until a new list is | |
1707 | available. */ | |
1708 | ||
1709 | if (list) | |
1710 | { | |
1711 | output = list[index]; | |
1712 | if (output) | |
1713 | { | |
1714 | index++; | |
1715 | } | |
1716 | } | |
1717 | ||
1718 | #if 0 | |
1719 | /* Can't do this because readline hasn't yet checked the word breaks | |
1720 | for figuring out whether to insert a quote. */ | |
1721 | if (output == NULL) | |
1722 | /* Make sure the word break characters are set back to normal for the | |
1723 | next time that readline tries to complete something. */ | |
1724 | rl_completer_word_break_characters = | |
1725 | gdb_completer_word_break_characters; | |
1726 | #endif | |
1727 | ||
1728 | return (output); | |
1729 | } | |
1730 | ||
9ed8604f PS |
1731 | /* Line completion interface function for readline. */ |
1732 | ||
1733 | static char * | |
1734 | readline_line_completion_function (text, matches) | |
1735 | char *text; | |
1736 | int matches; | |
1737 | { | |
1738 | return line_completion_function (text, matches, rl_line_buffer, rl_point); | |
1739 | } | |
1740 | ||
172559ec JK |
1741 | /* Skip over a possibly quoted word (as defined by the quote characters |
1742 | and word break characters the completer uses). Returns pointer to the | |
1743 | location after the "word". */ | |
1744 | ||
1745 | char * | |
1746 | skip_quoted (str) | |
1747 | char *str; | |
1748 | { | |
1749 | char quote_char = '\0'; | |
1750 | char *scan; | |
1751 | ||
1752 | for (scan = str; *scan != '\0'; scan++) | |
1753 | { | |
1754 | if (quote_char != '\0') | |
1755 | { | |
1756 | /* Ignore everything until the matching close quote char */ | |
1757 | if (*scan == quote_char) | |
1758 | { | |
1759 | /* Found matching close quote. */ | |
1760 | scan++; | |
1761 | break; | |
1762 | } | |
1763 | } | |
1764 | else if (strchr (gdb_completer_quote_characters, *scan)) | |
1765 | { | |
1766 | /* Found start of a quoted string. */ | |
1767 | quote_char = *scan; | |
1768 | } | |
1769 | else if (strchr (gdb_completer_word_break_characters, *scan)) | |
1770 | { | |
1771 | break; | |
1772 | } | |
1773 | } | |
1774 | return (scan); | |
1775 | } | |
1776 | ||
1777 | \f | |
1778 | #ifdef STOP_SIGNAL | |
1779 | static void | |
1780 | stop_sig (signo) | |
1781 | int signo; | |
1782 | { | |
1783 | #if STOP_SIGNAL == SIGTSTP | |
1784 | signal (SIGTSTP, SIG_DFL); | |
1785 | sigsetmask (0); | |
1786 | kill (getpid (), SIGTSTP); | |
1787 | signal (SIGTSTP, stop_sig); | |
1788 | #else | |
1789 | signal (STOP_SIGNAL, stop_sig); | |
1790 | #endif | |
1791 | printf_unfiltered ("%s", prompt); | |
1792 | gdb_flush (gdb_stdout); | |
1793 | ||
1794 | /* Forget about any previous command -- null line now will do nothing. */ | |
1795 | dont_repeat (); | |
1796 | } | |
1797 | #endif /* STOP_SIGNAL */ | |
1798 | ||
1799 | /* Initialize signal handlers. */ | |
1800 | static void | |
1801 | do_nothing (signo) | |
1802 | int signo; | |
1803 | { | |
1804 | } | |
1805 | ||
1806 | static void | |
1807 | init_signals () | |
1808 | { | |
1809 | signal (SIGINT, request_quit); | |
1810 | ||
1811 | /* If we initialize SIGQUIT to SIG_IGN, then the SIG_IGN will get | |
1812 | passed to the inferior, which we don't want. It would be | |
1813 | possible to do a "signal (SIGQUIT, SIG_DFL)" after we fork, but | |
1814 | on BSD4.3 systems using vfork, that can affect the | |
1815 | GDB process as well as the inferior (the signal handling tables | |
1816 | might be in memory, shared between the two). Since we establish | |
1817 | a handler for SIGQUIT, when we call exec it will set the signal | |
1818 | to SIG_DFL for us. */ | |
1819 | signal (SIGQUIT, do_nothing); | |
1820 | if (signal (SIGHUP, do_nothing) != SIG_IGN) | |
1821 | signal (SIGHUP, disconnect); | |
1822 | signal (SIGFPE, float_handler); | |
1823 | ||
1824 | #if defined(SIGWINCH) && defined(SIGWINCH_HANDLER) | |
1825 | signal (SIGWINCH, SIGWINCH_HANDLER); | |
1826 | #endif | |
1827 | } | |
1828 | \f | |
1829 | /* Read one line from the command input stream `instream' | |
1830 | into the local static buffer `linebuffer' (whose current length | |
1831 | is `linelength'). | |
1832 | The buffer is made bigger as necessary. | |
1833 | Returns the address of the start of the line. | |
1834 | ||
1835 | NULL is returned for end of file. | |
1836 | ||
1837 | *If* the instream == stdin & stdin is a terminal, the line read | |
1838 | is copied into the file line saver (global var char *line, | |
1839 | length linesize) so that it can be duplicated. | |
1840 | ||
1841 | This routine either uses fancy command line editing or | |
1842 | simple input as the user has requested. */ | |
1843 | ||
1844 | char * | |
1845 | command_line_input (prrompt, repeat, annotation_suffix) | |
1846 | char *prrompt; | |
1847 | int repeat; | |
1848 | char *annotation_suffix; | |
1849 | { | |
1850 | static char *linebuffer = 0; | |
1851 | static unsigned linelength = 0; | |
1852 | register char *p; | |
1853 | char *p1; | |
1854 | char *rl; | |
1855 | char *local_prompt = prrompt; | |
1856 | register int c; | |
1857 | char *nline; | |
1858 | char got_eof = 0; | |
1859 | ||
dfb14bc8 SS |
1860 | /* The annotation suffix must be non-NULL. */ |
1861 | if (annotation_suffix == NULL) | |
1862 | annotation_suffix = ""; | |
1863 | ||
172559ec JK |
1864 | if (annotation_level > 1 && instream == stdin) |
1865 | { | |
1866 | local_prompt = alloca ((prrompt == NULL ? 0 : strlen (prrompt)) | |
1867 | + strlen (annotation_suffix) + 40); | |
1868 | if (prrompt == NULL) | |
1869 | local_prompt[0] = '\0'; | |
1870 | else | |
1871 | strcpy (local_prompt, prrompt); | |
1872 | strcat (local_prompt, "\n\032\032"); | |
1873 | strcat (local_prompt, annotation_suffix); | |
1874 | strcat (local_prompt, "\n"); | |
1875 | } | |
1876 | ||
1877 | if (linebuffer == 0) | |
1878 | { | |
1879 | linelength = 80; | |
1880 | linebuffer = (char *) xmalloc (linelength); | |
1881 | } | |
1882 | ||
1883 | p = linebuffer; | |
1884 | ||
1885 | /* Control-C quits instantly if typed while in this loop | |
1886 | since it should not wait until the user types a newline. */ | |
1887 | immediate_quit++; | |
1888 | #ifdef STOP_SIGNAL | |
1889 | if (job_control) | |
1890 | signal (STOP_SIGNAL, stop_sig); | |
1891 | #endif | |
1892 | ||
1893 | while (1) | |
1894 | { | |
1895 | /* Make sure that all output has been output. Some machines may let | |
1896 | you get away with leaving out some of the gdb_flush, but not all. */ | |
1897 | wrap_here (""); | |
1898 | gdb_flush (gdb_stdout); | |
1899 | gdb_flush (gdb_stderr); | |
1900 | ||
1901 | if (source_file_name != NULL) | |
1902 | { | |
1903 | ++source_line_number; | |
1904 | sprintf (source_error, | |
1905 | "%s%s:%d: Error in sourced command file:\n", | |
1906 | source_pre_error, | |
1907 | source_file_name, | |
1908 | source_line_number); | |
1909 | error_pre_print = source_error; | |
1910 | } | |
1911 | ||
1912 | if (annotation_level > 1 && instream == stdin) | |
1913 | { | |
1914 | printf_unfiltered ("\n\032\032pre-"); | |
1915 | printf_unfiltered (annotation_suffix); | |
1916 | printf_unfiltered ("\n"); | |
1917 | } | |
1918 | ||
1919 | /* Don't use fancy stuff if not talking to stdin. */ | |
1920 | if (command_editing_p && instream == stdin | |
1921 | && ISATTY (instream)) | |
1922 | rl = readline (local_prompt); | |
1923 | else | |
1924 | rl = gdb_readline (local_prompt); | |
1925 | ||
1926 | if (annotation_level > 1 && instream == stdin) | |
1927 | { | |
1928 | printf_unfiltered ("\n\032\032post-"); | |
1929 | printf_unfiltered (annotation_suffix); | |
1930 | printf_unfiltered ("\n"); | |
1931 | } | |
1932 | ||
1933 | if (!rl || rl == (char *) EOF) | |
1934 | { | |
1935 | got_eof = 1; | |
1936 | break; | |
1937 | } | |
1938 | if (strlen(rl) + 1 + (p - linebuffer) > linelength) | |
1939 | { | |
1940 | linelength = strlen(rl) + 1 + (p - linebuffer); | |
1941 | nline = (char *) xrealloc (linebuffer, linelength); | |
1942 | p += nline - linebuffer; | |
1943 | linebuffer = nline; | |
1944 | } | |
1945 | p1 = rl; | |
1946 | /* Copy line. Don't copy null at end. (Leaves line alone | |
1947 | if this was just a newline) */ | |
1948 | while (*p1) | |
1949 | *p++ = *p1++; | |
1950 | ||
1951 | free (rl); /* Allocated in readline. */ | |
1952 | ||
1953 | if (p == linebuffer || *(p - 1) != '\\') | |
1954 | break; | |
1955 | ||
1956 | p--; /* Put on top of '\'. */ | |
1957 | local_prompt = (char *) 0; | |
1958 | } | |
1959 | ||
1960 | #ifdef STOP_SIGNAL | |
1961 | if (job_control) | |
1962 | signal (STOP_SIGNAL, SIG_DFL); | |
1963 | #endif | |
1964 | immediate_quit--; | |
1965 | ||
1966 | if (got_eof) | |
1967 | return NULL; | |
1968 | ||
1969 | #define SERVER_COMMAND_LENGTH 7 | |
1970 | server_command = | |
1971 | (p - linebuffer > SERVER_COMMAND_LENGTH) | |
1972 | && STREQN (linebuffer, "server ", SERVER_COMMAND_LENGTH); | |
1973 | if (server_command) | |
1974 | { | |
1975 | /* Note that we don't set `line'. Between this and the check in | |
1976 | dont_repeat, this insures that repeating will still do the | |
1977 | right thing. */ | |
1978 | *p = '\0'; | |
1979 | return linebuffer + SERVER_COMMAND_LENGTH; | |
1980 | } | |
1981 | ||
1982 | /* Do history expansion if that is wished. */ | |
1983 | if (history_expansion_p && instream == stdin | |
1984 | && ISATTY (instream)) | |
1985 | { | |
1986 | char *history_value; | |
1987 | int expanded; | |
1988 | ||
1989 | *p = '\0'; /* Insert null now. */ | |
1990 | expanded = history_expand (linebuffer, &history_value); | |
1991 | if (expanded) | |
1992 | { | |
1993 | /* Print the changes. */ | |
1994 | printf_unfiltered ("%s\n", history_value); | |
1995 | ||
1996 | /* If there was an error, call this function again. */ | |
1997 | if (expanded < 0) | |
1998 | { | |
1999 | free (history_value); | |
2000 | return command_line_input (prrompt, repeat, annotation_suffix); | |
2001 | } | |
2002 | if (strlen (history_value) > linelength) | |
2003 | { | |
2004 | linelength = strlen (history_value) + 1; | |
2005 | linebuffer = (char *) xrealloc (linebuffer, linelength); | |
2006 | } | |
2007 | strcpy (linebuffer, history_value); | |
2008 | p = linebuffer + strlen(linebuffer); | |
2009 | free (history_value); | |
2010 | } | |
2011 | } | |
2012 | ||
2013 | /* If we just got an empty line, and that is supposed | |
2014 | to repeat the previous command, return the value in the | |
2015 | global buffer. */ | |
2016 | if (repeat) | |
2017 | { | |
2018 | if (p == linebuffer) | |
2019 | return line; | |
2020 | p1 = linebuffer; | |
2021 | while (*p1 == ' ' || *p1 == '\t') | |
2022 | p1++; | |
2023 | if (!*p1) | |
2024 | return line; | |
2025 | } | |
2026 | ||
2027 | *p = 0; | |
2028 | ||
2029 | /* Add line to history if appropriate. */ | |
2030 | if (instream == stdin | |
2031 | && ISATTY (stdin) && *linebuffer) | |
2032 | add_history (linebuffer); | |
2033 | ||
2034 | /* Note: lines consisting solely of comments are added to the command | |
2035 | history. This is useful when you type a command, and then | |
2036 | realize you don't want to execute it quite yet. You can comment | |
2037 | out the command and then later fetch it from the value history | |
2038 | and remove the '#'. The kill ring is probably better, but some | |
2039 | people are in the habit of commenting things out. */ | |
2040 | p1 = linebuffer; | |
2041 | while ((c = *p1++) != '\0') | |
2042 | { | |
2043 | if (c == '"') | |
2044 | while ((c = *p1++) != '"') | |
2045 | { | |
2046 | /* Make sure an escaped '"' doesn't make us think the string | |
2047 | is ended. */ | |
2048 | if (c == '\\') | |
2049 | parse_escape (&p1); | |
2050 | if (c == '\0') | |
2051 | break; | |
2052 | } | |
2053 | else if (c == '\'') | |
2054 | while ((c = *p1++) != '\'') | |
2055 | { | |
2056 | /* Make sure an escaped '\'' doesn't make us think the string | |
2057 | is ended. */ | |
2058 | if (c == '\\') | |
2059 | parse_escape (&p1); | |
2060 | if (c == '\0') | |
2061 | break; | |
2062 | } | |
2063 | else if (c == '#') | |
2064 | { | |
2065 | /* Found a comment. */ | |
2066 | p1[-1] = '\0'; | |
2067 | break; | |
2068 | } | |
2069 | } | |
2070 | ||
2071 | /* Save into global buffer if appropriate. */ | |
2072 | if (repeat) | |
2073 | { | |
2074 | if (linelength > linesize) | |
2075 | { | |
2076 | line = xrealloc (line, linelength); | |
2077 | linesize = linelength; | |
2078 | } | |
2079 | strcpy (line, linebuffer); | |
2080 | return line; | |
2081 | } | |
2082 | ||
2083 | return linebuffer; | |
2084 | } | |
2085 | \f | |
e52bfe0c JL |
2086 | |
2087 | /* Expand the body_list of COMMAND so that it can hold NEW_LENGTH | |
2088 | code bodies. This is typically used when we encounter an "else" | |
2089 | clause for an "if" command. */ | |
2090 | ||
2091 | static void | |
2092 | realloc_body_list (command, new_length) | |
2093 | struct command_line *command; | |
2094 | int new_length; | |
2095 | { | |
2096 | int n; | |
2097 | struct command_line **body_list; | |
2098 | ||
2099 | n = command->body_count; | |
2100 | ||
2101 | /* Nothing to do? */ | |
2102 | if (new_length <= n) | |
2103 | return; | |
2104 | ||
2105 | body_list = (struct command_line **) | |
2106 | xmalloc (sizeof (struct command_line *) * new_length); | |
2107 | ||
2108 | memcpy (body_list, command->body_list, sizeof (struct command_line *) * n); | |
2109 | ||
2110 | free (command->body_list); | |
2111 | command->body_list = body_list; | |
2112 | command->body_count = new_length; | |
2113 | } | |
2114 | ||
2115 | /* Read one line from the input stream. If the command is an "else" or | |
2116 | "end", return such an indication to the caller. */ | |
2117 | ||
2118 | static enum misc_command_type | |
2119 | read_next_line (command) | |
2120 | struct command_line **command; | |
2121 | { | |
2122 | char *p, *p1, *prompt_ptr, control_prompt[256]; | |
2123 | int i = 0; | |
2124 | ||
2125 | if (control_level >= 254) | |
2126 | error ("Control nesting too deep!\n"); | |
2127 | ||
2128 | /* Set a prompt based on the nesting of the control commands. */ | |
2129 | if (instream == stdin) | |
2130 | { | |
2131 | for (i = 0; i < control_level; i++) | |
2132 | control_prompt[i] = ' '; | |
2133 | control_prompt[i] = '>'; | |
2134 | control_prompt[i+1] = '\0'; | |
2135 | prompt_ptr = (char *)&control_prompt[0]; | |
2136 | } | |
2137 | else | |
2138 | prompt_ptr = NULL; | |
2139 | ||
e04f8901 | 2140 | p = command_line_input (prompt_ptr, instream == stdin, "commands"); |
e52bfe0c JL |
2141 | |
2142 | /* Not sure what to do here. */ | |
2143 | if (p == NULL) | |
2144 | return end_command; | |
2145 | ||
2146 | /* Strip leading and trailing whitespace. */ | |
2147 | while (*p == ' ' || *p == '\t') | |
2148 | p++; | |
2149 | ||
2150 | p1 = p + strlen (p); | |
2151 | while (p1 != p && (p1[-1] == ' ' || p1[-1] == '\t')) | |
2152 | p1--; | |
2153 | ||
2154 | /* Blanks and comments don't really do anything, but we need to | |
2155 | distinguish them from else, end and other commands which can be | |
2156 | executed. */ | |
2157 | if (p1 == p || p[0] == '#') | |
2158 | return nop_command; | |
2159 | ||
2160 | /* Is this the end of a simple, while, or if control structure? */ | |
2161 | if (p1 - p == 3 && !strncmp (p, "end", 3)) | |
2162 | return end_command; | |
2163 | ||
2164 | /* Is the else clause of an if control structure? */ | |
2165 | if (p1 - p == 4 && !strncmp (p, "else", 4)) | |
2166 | return else_command; | |
2167 | ||
2168 | /* Check for while, if, break, continue, etc and build a new command | |
2169 | line structure for them. */ | |
2170 | if (p1 - p > 5 && !strncmp (p, "while", 5)) | |
2171 | *command = build_command_line (while_control, p + 6); | |
2172 | else if (p1 - p > 2 && !strncmp (p, "if", 2)) | |
2173 | *command = build_command_line (if_control, p + 3); | |
2174 | else if (p1 - p == 5 && !strncmp (p, "loop_break", 5)) | |
2175 | { | |
2176 | *command = (struct command_line *) | |
2177 | xmalloc (sizeof (struct command_line)); | |
2178 | (*command)->next = NULL; | |
2179 | (*command)->line = NULL; | |
2180 | (*command)->control_type = break_control; | |
2181 | (*command)->body_count = 0; | |
2182 | (*command)->body_list = NULL; | |
2183 | } | |
2184 | else if (p1 - p == 8 && !strncmp (p, "loop_continue", 8)) | |
2185 | { | |
2186 | *command = (struct command_line *) | |
2187 | xmalloc (sizeof (struct command_line)); | |
2188 | (*command)->next = NULL; | |
2189 | (*command)->line = NULL; | |
2190 | (*command)->control_type = continue_control; | |
2191 | (*command)->body_count = 0; | |
2192 | (*command)->body_list = NULL; | |
2193 | } | |
2194 | else | |
2195 | { | |
2196 | /* A normal command. */ | |
2197 | *command = (struct command_line *) | |
2198 | xmalloc (sizeof (struct command_line)); | |
2199 | (*command)->next = NULL; | |
2200 | (*command)->line = savestring (p, p1 - p); | |
2201 | (*command)->control_type = simple_control; | |
2202 | (*command)->body_count = 0; | |
2203 | (*command)->body_list = NULL; | |
2204 | } | |
2205 | ||
2206 | /* Nothing special. */ | |
2207 | return ok_command; | |
2208 | } | |
2209 | ||
2210 | /* Recursively read in the control structures and create a command_line | |
2211 | tructure from them. | |
2212 | ||
2213 | The parent_control parameter is the control structure in which the | |
2214 | following commands are nested. */ | |
2215 | ||
2216 | static enum command_control_type | |
2217 | recurse_read_control_structure (current_cmd) | |
2218 | struct command_line *current_cmd; | |
2219 | { | |
2220 | int current_body, i; | |
2221 | enum misc_command_type val; | |
2222 | enum command_control_type ret; | |
2223 | struct command_line **body_ptr, *child_tail, *next; | |
2224 | struct cleanup *old_chains, *tmp_chains; | |
2225 | ||
2226 | old_chains = NULL; | |
2227 | child_tail = NULL; | |
2228 | current_body = 1; | |
2229 | ||
2230 | /* Sanity checks. */ | |
2231 | if (current_cmd->control_type == simple_control) | |
2232 | { | |
2233 | error ("Recursed on a simple control type\n"); | |
2234 | return invalid_control; | |
2235 | } | |
2236 | ||
2237 | if (current_body > current_cmd->body_count) | |
2238 | { | |
2239 | error ("Allocated body is smaller than this command type needs\n"); | |
2240 | return invalid_control; | |
2241 | } | |
2242 | ||
2243 | /* Read lines from the input stream and build control structures. */ | |
2244 | while (1) | |
2245 | { | |
2246 | dont_repeat (); | |
2247 | ||
2248 | next = NULL; | |
2249 | val = read_next_line (&next); | |
2250 | ||
2251 | /* Just skip blanks and comments. */ | |
2252 | if (val == nop_command) | |
2253 | continue; | |
2254 | ||
2255 | if (val == end_command) | |
2256 | { | |
2257 | if (current_cmd->control_type == while_control | |
2258 | || current_cmd->control_type == if_control) | |
2259 | { | |
2260 | /* Success reading an entire control structure. */ | |
2261 | ret = simple_control; | |
2262 | break; | |
2263 | } | |
2264 | else | |
2265 | { | |
2266 | ret = invalid_control; | |
2267 | break; | |
2268 | } | |
2269 | } | |
2270 | ||
2271 | /* Not the end of a control structure. */ | |
2272 | if (val == else_command) | |
2273 | { | |
2274 | if (current_cmd->control_type == if_control | |
2275 | && current_body == 1) | |
2276 | { | |
2277 | realloc_body_list (current_cmd, 2); | |
2278 | current_body = 2; | |
2279 | child_tail = NULL; | |
2280 | continue; | |
2281 | } | |
2282 | else | |
2283 | { | |
2284 | ret = invalid_control; | |
2285 | break; | |
2286 | } | |
2287 | } | |
2288 | ||
2289 | if (child_tail) | |
2290 | { | |
2291 | child_tail->next = next; | |
2292 | } | |
2293 | else | |
2294 | { | |
2295 | /* We have just read the first line of the child's control | |
2296 | structure. From now on, arrange to throw away the line | |
2297 | we have if we quit or get an error. */ | |
2298 | body_ptr = current_cmd->body_list; | |
2299 | for (i = 1; i < current_body; i++) | |
2300 | body_ptr++; | |
2301 | ||
2302 | *body_ptr = next; | |
2303 | ||
2304 | tmp_chains = make_cleanup (free_command_lines, body_ptr); | |
2305 | ||
2306 | if (!old_chains) | |
2307 | old_chains = tmp_chains; | |
2308 | } | |
2309 | ||
2310 | child_tail = next; | |
2311 | ||
2312 | /* If the latest line is another control structure, then recurse | |
2313 | on it. */ | |
2314 | if (next->control_type == while_control | |
2315 | || next->control_type == if_control) | |
2316 | { | |
2317 | control_level++; | |
2318 | ret = recurse_read_control_structure (next); | |
2319 | control_level--; | |
2320 | ||
2321 | if (ret != simple_control) | |
2322 | break; | |
2323 | } | |
2324 | } | |
2325 | ||
2326 | dont_repeat (); | |
2327 | if (ret == invalid_control && old_chains) | |
2328 | do_cleanups (old_chains); | |
2329 | else if (old_chains) | |
2330 | discard_cleanups (old_chains); | |
2331 | ||
2332 | return ret; | |
2333 | } | |
2334 | ||
2335 | ||
172559ec JK |
2336 | /* Read lines from the input stream |
2337 | and accumulate them in a chain of struct command_line's | |
2338 | which is then returned. */ | |
2339 | ||
2340 | struct command_line * | |
2341 | read_command_lines () | |
2342 | { | |
e52bfe0c JL |
2343 | struct command_line *head, *tail, *next; |
2344 | struct cleanup *old_chain; | |
2345 | enum command_control_type ret; | |
2346 | enum misc_command_type val; | |
2347 | ||
2348 | head = tail = NULL; | |
2349 | old_chain = NULL; | |
172559ec JK |
2350 | |
2351 | while (1) | |
2352 | { | |
e52bfe0c | 2353 | val = read_next_line (&next); |
172559ec | 2354 | |
e52bfe0c JL |
2355 | /* Ignore blank lines or comments. */ |
2356 | if (val == nop_command) | |
2357 | continue; | |
2358 | ||
2359 | if (val == end_command) | |
2360 | { | |
2361 | ret = simple_control; | |
2362 | break; | |
2363 | } | |
2364 | ||
2365 | if (val != ok_command) | |
2366 | { | |
2367 | ret = invalid_control; | |
2368 | break; | |
2369 | } | |
2370 | ||
2371 | if (next->control_type == while_control | |
2372 | || next->control_type == if_control) | |
2373 | { | |
2374 | control_level++; | |
2375 | ret = recurse_read_control_structure (next); | |
2376 | control_level--; | |
172559ec | 2377 | |
e52bfe0c JL |
2378 | if (ret == invalid_control) |
2379 | break; | |
2380 | } | |
2381 | ||
172559ec JK |
2382 | if (tail) |
2383 | { | |
2384 | tail->next = next; | |
2385 | } | |
2386 | else | |
2387 | { | |
e52bfe0c JL |
2388 | head = next; |
2389 | old_chain = make_cleanup (free_command_lines, &head); | |
172559ec JK |
2390 | } |
2391 | tail = next; | |
2392 | } | |
2393 | ||
2394 | dont_repeat (); | |
2395 | ||
e52bfe0c JL |
2396 | if (head) |
2397 | { | |
2398 | if (ret != invalid_control) | |
2399 | { | |
2400 | discard_cleanups (old_chain); | |
2401 | return head; | |
2402 | } | |
2403 | else | |
2404 | do_cleanups (old_chain); | |
2405 | } | |
2406 | ||
2407 | return NULL; | |
172559ec JK |
2408 | } |
2409 | ||
2410 | /* Free a chain of struct command_line's. */ | |
2411 | ||
2412 | void | |
2413 | free_command_lines (lptr) | |
2414 | struct command_line **lptr; | |
2415 | { | |
2416 | register struct command_line *l = *lptr; | |
2417 | register struct command_line *next; | |
e52bfe0c JL |
2418 | struct command_line **blist; |
2419 | int i; | |
172559ec JK |
2420 | |
2421 | while (l) | |
2422 | { | |
e52bfe0c JL |
2423 | if (l->body_count > 0) |
2424 | { | |
2425 | blist = l->body_list; | |
2426 | for (i = 0; i < l->body_count; i++, blist++) | |
2427 | free_command_lines (blist); | |
2428 | } | |
172559ec JK |
2429 | next = l->next; |
2430 | free (l->line); | |
2431 | free ((PTR)l); | |
2432 | l = next; | |
2433 | } | |
2434 | } | |
2435 | \f | |
2436 | /* Add an element to the list of info subcommands. */ | |
2437 | ||
2438 | void | |
2439 | add_info (name, fun, doc) | |
2440 | char *name; | |
2441 | void (*fun) PARAMS ((char *, int)); | |
2442 | char *doc; | |
2443 | { | |
2444 | add_cmd (name, no_class, fun, doc, &infolist); | |
2445 | } | |
2446 | ||
2447 | /* Add an alias to the list of info subcommands. */ | |
2448 | ||
2449 | void | |
2450 | add_info_alias (name, oldname, abbrev_flag) | |
2451 | char *name; | |
2452 | char *oldname; | |
2453 | int abbrev_flag; | |
2454 | { | |
2455 | add_alias_cmd (name, oldname, 0, abbrev_flag, &infolist); | |
2456 | } | |
2457 | ||
2458 | /* The "info" command is defined as a prefix, with allow_unknown = 0. | |
2459 | Therefore, its own definition is called only for "info" with no args. */ | |
2460 | ||
2461 | /* ARGSUSED */ | |
2462 | static void | |
2463 | info_command (arg, from_tty) | |
2464 | char *arg; | |
2465 | int from_tty; | |
2466 | { | |
2467 | printf_unfiltered ("\"info\" must be followed by the name of an info command.\n"); | |
2468 | help_list (infolist, "info ", -1, gdb_stdout); | |
2469 | } | |
2470 | ||
2471 | /* The "complete" command is used by Emacs to implement completion. */ | |
2472 | ||
2473 | /* ARGSUSED */ | |
2474 | static void | |
2475 | complete_command (arg, from_tty) | |
2476 | char *arg; | |
2477 | int from_tty; | |
2478 | { | |
2479 | int i; | |
9ed8604f | 2480 | int argpoint; |
172559ec JK |
2481 | char *completion; |
2482 | ||
2483 | dont_repeat (); | |
2484 | ||
2485 | if (arg == NULL) | |
9ed8604f PS |
2486 | arg = ""; |
2487 | argpoint = strlen (arg); | |
172559ec | 2488 | |
9ed8604f | 2489 | for (completion = line_completion_function (arg, i = 0, arg, argpoint); |
172559ec | 2490 | completion; |
9ed8604f PS |
2491 | completion = line_completion_function (arg, ++i, arg, argpoint)) |
2492 | { | |
2493 | printf_unfiltered ("%s\n", completion); | |
2494 | free (completion); | |
2495 | } | |
172559ec JK |
2496 | } |
2497 | ||
2498 | /* The "show" command with no arguments shows all the settings. */ | |
2499 | ||
2500 | /* ARGSUSED */ | |
2501 | static void | |
2502 | show_command (arg, from_tty) | |
2503 | char *arg; | |
2504 | int from_tty; | |
2505 | { | |
2506 | cmd_show_list (showlist, from_tty, ""); | |
2507 | } | |
2508 | \f | |
2509 | /* Add an element to the list of commands. */ | |
2510 | ||
2511 | void | |
2512 | add_com (name, class, fun, doc) | |
2513 | char *name; | |
2514 | enum command_class class; | |
2515 | void (*fun) PARAMS ((char *, int)); | |
2516 | char *doc; | |
2517 | { | |
2518 | add_cmd (name, class, fun, doc, &cmdlist); | |
2519 | } | |
2520 | ||
2521 | /* Add an alias or abbreviation command to the list of commands. */ | |
2522 | ||
2523 | void | |
2524 | add_com_alias (name, oldname, class, abbrev_flag) | |
2525 | char *name; | |
2526 | char *oldname; | |
2527 | enum command_class class; | |
2528 | int abbrev_flag; | |
2529 | { | |
2530 | add_alias_cmd (name, oldname, class, abbrev_flag, &cmdlist); | |
2531 | } | |
2532 | ||
2533 | void | |
2534 | error_no_arg (why) | |
2535 | char *why; | |
2536 | { | |
2537 | error ("Argument required (%s).", why); | |
2538 | } | |
2539 | ||
2540 | /* ARGSUSED */ | |
2541 | static void | |
2542 | help_command (command, from_tty) | |
2543 | char *command; | |
2544 | int from_tty; /* Ignored */ | |
2545 | { | |
2546 | help_cmd (command, gdb_stdout); | |
2547 | } | |
2548 | \f | |
2549 | static void | |
2550 | validate_comname (comname) | |
2551 | char *comname; | |
2552 | { | |
2553 | register char *p; | |
2554 | ||
2555 | if (comname == 0) | |
2556 | error_no_arg ("name of command to define"); | |
2557 | ||
2558 | p = comname; | |
2559 | while (*p) | |
2560 | { | |
2561 | if (!isalnum(*p) && *p != '-') | |
2562 | error ("Junk in argument list: \"%s\"", p); | |
2563 | p++; | |
2564 | } | |
2565 | } | |
2566 | ||
2567 | /* This is just a placeholder in the command data structures. */ | |
2568 | static void | |
2569 | user_defined_command (ignore, from_tty) | |
2570 | char *ignore; | |
2571 | int from_tty; | |
2572 | { | |
2573 | } | |
2574 | ||
2575 | static void | |
2576 | define_command (comname, from_tty) | |
2577 | char *comname; | |
2578 | int from_tty; | |
2579 | { | |
2580 | register struct command_line *cmds; | |
2581 | register struct cmd_list_element *c, *newc, *hookc = 0; | |
2582 | char *tem = comname; | |
2583 | #define HOOK_STRING "hook-" | |
2584 | #define HOOK_LEN 5 | |
2585 | ||
2586 | validate_comname (comname); | |
2587 | ||
2588 | /* Look it up, and verify that we got an exact match. */ | |
2589 | c = lookup_cmd (&tem, cmdlist, "", -1, 1); | |
2590 | if (c && !STREQ (comname, c->name)) | |
2591 | c = 0; | |
e52bfe0c | 2592 | |
172559ec JK |
2593 | if (c) |
2594 | { | |
2595 | if (c->class == class_user || c->class == class_alias) | |
2596 | tem = "Redefine command \"%s\"? "; | |
2597 | else | |
2598 | tem = "Really redefine built-in command \"%s\"? "; | |
2599 | if (!query (tem, c->name)) | |
2600 | error ("Command \"%s\" not redefined.", c->name); | |
2601 | } | |
2602 | ||
2603 | /* If this new command is a hook, then mark the command which it | |
2604 | is hooking. Note that we allow hooking `help' commands, so that | |
2605 | we can hook the `stop' pseudo-command. */ | |
2606 | ||
2607 | if (!strncmp (comname, HOOK_STRING, HOOK_LEN)) | |
2608 | { | |
2609 | /* Look up cmd it hooks, and verify that we got an exact match. */ | |
2610 | tem = comname+HOOK_LEN; | |
2611 | hookc = lookup_cmd (&tem, cmdlist, "", -1, 0); | |
2612 | if (hookc && !STREQ (comname+HOOK_LEN, hookc->name)) | |
2613 | hookc = 0; | |
2614 | if (!hookc) | |
2615 | { | |
2616 | warning ("Your new `%s' command does not hook any existing command.", | |
2617 | comname); | |
2618 | if (!query ("Proceed? ", (char *)0)) | |
2619 | error ("Not confirmed."); | |
2620 | } | |
2621 | } | |
2622 | ||
2623 | comname = savestring (comname, strlen (comname)); | |
2624 | ||
e52bfe0c | 2625 | /* If the rest of the commands will be case insensitive, this one |
172559ec JK |
2626 | should behave in the same manner. */ |
2627 | for (tem = comname; *tem; tem++) | |
2628 | if (isupper(*tem)) *tem = tolower(*tem); | |
2629 | ||
2630 | if (from_tty) | |
2631 | { | |
2632 | printf_unfiltered ("Type commands for definition of \"%s\".\n\ | |
2633 | End with a line saying just \"end\".\n", comname); | |
2634 | gdb_flush (gdb_stdout); | |
2635 | } | |
2636 | ||
e52bfe0c | 2637 | control_level = 0; |
172559ec JK |
2638 | cmds = read_command_lines (); |
2639 | ||
2640 | if (c && c->class == class_user) | |
2641 | free_command_lines (&c->user_commands); | |
2642 | ||
2643 | newc = add_cmd (comname, class_user, user_defined_command, | |
2644 | (c && c->class == class_user) | |
2645 | ? c->doc : savestring ("User-defined.", 13), &cmdlist); | |
2646 | newc->user_commands = cmds; | |
2647 | ||
2648 | /* If this new command is a hook, then mark both commands as being | |
2649 | tied. */ | |
2650 | if (hookc) | |
2651 | { | |
2652 | hookc->hook = newc; /* Target gets hooked. */ | |
2653 | newc->hookee = hookc; /* We are marked as hooking target cmd. */ | |
2654 | } | |
2655 | } | |
2656 | ||
2657 | static void | |
2658 | document_command (comname, from_tty) | |
2659 | char *comname; | |
2660 | int from_tty; | |
2661 | { | |
2662 | struct command_line *doclines; | |
2663 | register struct cmd_list_element *c; | |
2664 | char *tem = comname; | |
2665 | ||
2666 | validate_comname (comname); | |
2667 | ||
2668 | c = lookup_cmd (&tem, cmdlist, "", 0, 1); | |
2669 | ||
2670 | if (c->class != class_user) | |
2671 | error ("Command \"%s\" is built-in.", comname); | |
2672 | ||
2673 | if (from_tty) | |
2674 | printf_unfiltered ("Type documentation for \"%s\".\n\ | |
2675 | End with a line saying just \"end\".\n", comname); | |
2676 | ||
2677 | doclines = read_command_lines (); | |
2678 | ||
2679 | if (c->doc) free (c->doc); | |
2680 | ||
2681 | { | |
2682 | register struct command_line *cl1; | |
2683 | register int len = 0; | |
2684 | ||
2685 | for (cl1 = doclines; cl1; cl1 = cl1->next) | |
2686 | len += strlen (cl1->line) + 1; | |
2687 | ||
2688 | c->doc = (char *) xmalloc (len + 1); | |
2689 | *c->doc = 0; | |
2690 | ||
2691 | for (cl1 = doclines; cl1; cl1 = cl1->next) | |
2692 | { | |
2693 | strcat (c->doc, cl1->line); | |
2694 | if (cl1->next) | |
2695 | strcat (c->doc, "\n"); | |
2696 | } | |
2697 | } | |
2698 | ||
2699 | free_command_lines (&doclines); | |
2700 | } | |
2701 | \f | |
2702 | void | |
2703 | print_gnu_advertisement () | |
2704 | { | |
2705 | printf_unfiltered ("\ | |
2706 | GDB is free software and you are welcome to distribute copies of it\n\ | |
2707 | under certain conditions; type \"show copying\" to see the conditions.\n\ | |
2708 | There is absolutely no warranty for GDB; type \"show warranty\" for details.\n\ | |
2709 | "); | |
2710 | } | |
2711 | ||
2712 | void | |
2713 | print_gdb_version (stream) | |
2714 | GDB_FILE *stream; | |
2715 | { | |
2716 | fprintf_filtered (stream, "\ | |
2717 | GDB %s (%s", version, host_name); | |
2718 | ||
2719 | if (!STREQ (host_name, target_name)) | |
2720 | fprintf_filtered (stream, " --target %s", target_name); | |
2721 | ||
2722 | fprintf_filtered (stream, "), "); | |
2723 | wrap_here(""); | |
7f4b4b71 | 2724 | fprintf_filtered (stream, "Copyright 1995 Free Software Foundation, Inc."); |
172559ec JK |
2725 | } |
2726 | ||
2727 | /* ARGSUSED */ | |
2728 | static void | |
2729 | show_version (args, from_tty) | |
2730 | char *args; | |
2731 | int from_tty; | |
2732 | { | |
2733 | immediate_quit++; | |
2734 | print_gnu_advertisement (); | |
2735 | print_gdb_version (gdb_stdout); | |
2736 | printf_filtered ("\n"); | |
2737 | immediate_quit--; | |
2738 | } | |
2739 | \f | |
2740 | /* xgdb calls this to reprint the usual GDB prompt. Obsolete now that xgdb | |
2741 | is obsolete. */ | |
2742 | ||
2743 | void | |
2744 | print_prompt () | |
2745 | { | |
2746 | printf_unfiltered ("%s", prompt); | |
2747 | gdb_flush (gdb_stdout); | |
2748 | } | |
2749 | \f | |
2750 | void | |
2751 | quit_command (args, from_tty) | |
2752 | char *args; | |
2753 | int from_tty; | |
2754 | { | |
2755 | if (inferior_pid != 0 && target_has_execution) | |
2756 | { | |
2757 | if (attach_flag) | |
2758 | { | |
2759 | if (query ("The program is running. Quit anyway (and detach it)? ")) | |
2760 | target_detach (args, from_tty); | |
2761 | else | |
2762 | error ("Not confirmed."); | |
2763 | } | |
2764 | else | |
2765 | { | |
2766 | if (query ("The program is running. Quit anyway (and kill it)? ")) | |
2767 | target_kill (); | |
2768 | else | |
2769 | error ("Not confirmed."); | |
2770 | } | |
2771 | } | |
2772 | /* UDI wants this, to kill the TIP. */ | |
2773 | target_close (1); | |
2774 | ||
2775 | /* Save the history information if it is appropriate to do so. */ | |
2776 | if (write_history_p && history_filename) | |
2777 | write_history (history_filename); | |
2778 | ||
2779 | exit (0); | |
2780 | } | |
2781 | ||
2782 | /* Returns whether GDB is running on a terminal and whether the user | |
2783 | desires that questions be asked of them on that terminal. */ | |
2784 | ||
2785 | int | |
2786 | input_from_terminal_p () | |
2787 | { | |
2788 | return gdb_has_a_terminal () && (instream == stdin) & caution; | |
2789 | } | |
2790 | \f | |
2791 | /* ARGSUSED */ | |
2792 | static void | |
2793 | pwd_command (args, from_tty) | |
2794 | char *args; | |
2795 | int from_tty; | |
2796 | { | |
2797 | if (args) error ("The \"pwd\" command does not take an argument: %s", args); | |
b7ec5b8d | 2798 | getcwd (gdb_dirbuf, sizeof (gdb_dirbuf)); |
172559ec | 2799 | |
b7ec5b8d | 2800 | if (!STREQ (gdb_dirbuf, current_directory)) |
172559ec | 2801 | printf_unfiltered ("Working directory %s\n (canonically %s).\n", |
b7ec5b8d | 2802 | current_directory, gdb_dirbuf); |
172559ec JK |
2803 | else |
2804 | printf_unfiltered ("Working directory %s.\n", current_directory); | |
2805 | } | |
2806 | ||
2807 | void | |
2808 | cd_command (dir, from_tty) | |
2809 | char *dir; | |
2810 | int from_tty; | |
2811 | { | |
2812 | int len; | |
2813 | /* Found something other than leading repetitions of "/..". */ | |
2814 | int found_real_path; | |
2815 | char *p; | |
2816 | ||
2817 | /* If the new directory is absolute, repeat is a no-op; if relative, | |
2818 | repeat might be useful but is more likely to be a mistake. */ | |
2819 | dont_repeat (); | |
2820 | ||
2821 | if (dir == 0) | |
2822 | error_no_arg ("new working directory"); | |
2823 | ||
2824 | dir = tilde_expand (dir); | |
2825 | make_cleanup (free, dir); | |
2826 | ||
2827 | if (chdir (dir) < 0) | |
2828 | perror_with_name (dir); | |
2829 | ||
2830 | len = strlen (dir); | |
2831 | dir = savestring (dir, len - (len > 1 && dir[len-1] == '/')); | |
2832 | if (dir[0] == '/') | |
2833 | current_directory = dir; | |
2834 | else | |
2835 | { | |
2836 | if (current_directory[0] == '/' && current_directory[1] == '\0') | |
2837 | current_directory = concat (current_directory, dir, NULL); | |
2838 | else | |
2839 | current_directory = concat (current_directory, "/", dir, NULL); | |
2840 | free (dir); | |
2841 | } | |
2842 | ||
2843 | /* Now simplify any occurrences of `.' and `..' in the pathname. */ | |
2844 | ||
2845 | found_real_path = 0; | |
2846 | for (p = current_directory; *p;) | |
2847 | { | |
2848 | if (p[0] == '/' && p[1] == '.' && (p[2] == 0 || p[2] == '/')) | |
2849 | strcpy (p, p + 2); | |
2850 | else if (p[0] == '/' && p[1] == '.' && p[2] == '.' | |
2851 | && (p[3] == 0 || p[3] == '/')) | |
2852 | { | |
2853 | if (found_real_path) | |
2854 | { | |
2855 | /* Search backwards for the directory just before the "/.." | |
2856 | and obliterate it and the "/..". */ | |
2857 | char *q = p; | |
2858 | while (q != current_directory && q[-1] != '/') | |
2859 | --q; | |
2860 | ||
2861 | if (q == current_directory) | |
2862 | /* current_directory is | |
2863 | a relative pathname ("can't happen"--leave it alone). */ | |
2864 | ++p; | |
2865 | else | |
2866 | { | |
2867 | strcpy (q - 1, p + 3); | |
2868 | p = q - 1; | |
2869 | } | |
2870 | } | |
2871 | else | |
2872 | /* We are dealing with leading repetitions of "/..", for example | |
2873 | "/../..", which is the Mach super-root. */ | |
2874 | p += 3; | |
2875 | } | |
2876 | else | |
2877 | { | |
2878 | found_real_path = 1; | |
2879 | ++p; | |
2880 | } | |
2881 | } | |
2882 | ||
2883 | forget_cached_source_info (); | |
2884 | ||
2885 | if (from_tty) | |
2886 | pwd_command ((char *) 0, 1); | |
2887 | } | |
2888 | \f | |
2889 | struct source_cleanup_lines_args { | |
2890 | int old_line; | |
2891 | char *old_file; | |
2892 | char *old_pre_error; | |
2893 | char *old_error_pre_print; | |
2894 | }; | |
2895 | ||
2896 | static void | |
2897 | source_cleanup_lines (args) | |
2898 | PTR args; | |
2899 | { | |
2900 | struct source_cleanup_lines_args *p = | |
2901 | (struct source_cleanup_lines_args *)args; | |
2902 | source_line_number = p->old_line; | |
2903 | source_file_name = p->old_file; | |
2904 | source_pre_error = p->old_pre_error; | |
2905 | error_pre_print = p->old_error_pre_print; | |
2906 | } | |
2907 | ||
2908 | /* ARGSUSED */ | |
2909 | void | |
2910 | source_command (args, from_tty) | |
2911 | char *args; | |
2912 | int from_tty; | |
2913 | { | |
2914 | FILE *stream; | |
2915 | struct cleanup *old_cleanups; | |
2916 | char *file = args; | |
2917 | struct source_cleanup_lines_args old_lines; | |
2918 | int needed_length; | |
2919 | ||
2920 | if (file == NULL) | |
2921 | { | |
2922 | error ("source command requires pathname of file to source."); | |
2923 | } | |
2924 | ||
2925 | file = tilde_expand (file); | |
2926 | old_cleanups = make_cleanup (free, file); | |
2927 | ||
2928 | stream = fopen (file, FOPEN_RT); | |
2929 | if (stream == 0) | |
2930 | perror_with_name (file); | |
2931 | ||
2932 | make_cleanup (fclose, stream); | |
2933 | ||
2934 | old_lines.old_line = source_line_number; | |
2935 | old_lines.old_file = source_file_name; | |
2936 | old_lines.old_pre_error = source_pre_error; | |
2937 | old_lines.old_error_pre_print = error_pre_print; | |
2938 | make_cleanup (source_cleanup_lines, &old_lines); | |
2939 | source_line_number = 0; | |
2940 | source_file_name = file; | |
2941 | source_pre_error = error_pre_print == NULL ? "" : error_pre_print; | |
2942 | source_pre_error = savestring (source_pre_error, strlen (source_pre_error)); | |
2943 | make_cleanup (free, source_pre_error); | |
2944 | /* This will get set every time we read a line. So it won't stay "" for | |
2945 | long. */ | |
2946 | error_pre_print = ""; | |
2947 | ||
2948 | needed_length = strlen (source_file_name) + strlen (source_pre_error) + 80; | |
2949 | if (source_error_allocated < needed_length) | |
2950 | { | |
2951 | source_error_allocated *= 2; | |
2952 | if (source_error_allocated < needed_length) | |
2953 | source_error_allocated = needed_length; | |
2954 | if (source_error == NULL) | |
2955 | source_error = xmalloc (source_error_allocated); | |
2956 | else | |
2957 | source_error = xrealloc (source_error, source_error_allocated); | |
2958 | } | |
2959 | ||
2960 | read_command_file (stream); | |
2961 | ||
2962 | do_cleanups (old_cleanups); | |
2963 | } | |
2964 | ||
2965 | /* ARGSUSED */ | |
2966 | static void | |
2967 | echo_command (text, from_tty) | |
2968 | char *text; | |
2969 | int from_tty; | |
2970 | { | |
2971 | char *p = text; | |
2972 | register int c; | |
2973 | ||
2974 | if (text) | |
2975 | while ((c = *p++) != '\0') | |
2976 | { | |
2977 | if (c == '\\') | |
2978 | { | |
2979 | /* \ at end of argument is used after spaces | |
2980 | so they won't be lost. */ | |
2981 | if (*p == 0) | |
2982 | return; | |
2983 | ||
2984 | c = parse_escape (&p); | |
2985 | if (c >= 0) | |
2986 | printf_filtered ("%c", c); | |
2987 | } | |
2988 | else | |
2989 | printf_filtered ("%c", c); | |
2990 | } | |
2991 | ||
2992 | /* Force this output to appear now. */ | |
2993 | wrap_here (""); | |
2994 | gdb_flush (gdb_stdout); | |
2995 | } | |
2996 | ||
b8176214 ILT |
2997 | \f |
2998 | #ifdef TARGET_BYTE_ORDER_SELECTABLE | |
2999 | ||
3000 | /* Functions to manipulate the endianness of the target. */ | |
3001 | ||
3002 | #ifndef TARGET_BYTE_ORDER_DEFAULT | |
3003 | #define TARGET_BYTE_ORDER_DEFAULT BIG_ENDIAN | |
3004 | #endif | |
3005 | ||
3006 | int target_byte_order = TARGET_BYTE_ORDER_DEFAULT; | |
3007 | ||
b83ed019 ILT |
3008 | static int target_byte_order_auto = 1; |
3009 | ||
b8176214 ILT |
3010 | /* Called if the user enters ``set endian'' without an argument. */ |
3011 | static void | |
3012 | set_endian (args, from_tty) | |
3013 | char *args; | |
3014 | int from_tty; | |
3015 | { | |
b83ed019 | 3016 | printf_unfiltered ("\"set endian\" must be followed by \"auto\", \"big\" or \"little\".\n"); |
b8176214 ILT |
3017 | show_endian (args, from_tty); |
3018 | } | |
3019 | ||
3020 | /* Called by ``set endian big''. */ | |
3021 | static void | |
3022 | set_endian_big (args, from_tty) | |
3023 | char *args; | |
3024 | int from_tty; | |
3025 | { | |
3026 | target_byte_order = BIG_ENDIAN; | |
b83ed019 | 3027 | target_byte_order_auto = 0; |
b8176214 ILT |
3028 | } |
3029 | ||
3030 | /* Called by ``set endian little''. */ | |
3031 | static void | |
3032 | set_endian_little (args, from_tty) | |
3033 | char *args; | |
3034 | int from_tty; | |
3035 | { | |
3036 | target_byte_order = LITTLE_ENDIAN; | |
b83ed019 ILT |
3037 | target_byte_order_auto = 0; |
3038 | } | |
3039 | ||
3040 | /* Called by ``set endian auto''. */ | |
3041 | static void | |
3042 | set_endian_auto (args, from_tty) | |
3043 | char *args; | |
3044 | int from_tty; | |
3045 | { | |
3046 | target_byte_order_auto = 1; | |
b8176214 ILT |
3047 | } |
3048 | ||
3049 | /* Called by ``show endian''. */ | |
3050 | static void | |
3051 | show_endian (args, from_tty) | |
3052 | char *args; | |
3053 | int from_tty; | |
3054 | { | |
b83ed019 ILT |
3055 | const char *msg = |
3056 | (target_byte_order_auto | |
3057 | ? "The target endianness is set automatically (currently %s endian)\n" | |
3058 | : "The target is assumed to be %s endian\n"); | |
3059 | printf_unfiltered (msg, TARGET_BYTE_ORDER == BIG_ENDIAN ? "big" : "little"); | |
b8176214 ILT |
3060 | } |
3061 | ||
3062 | #endif /* defined (TARGET_BYTE_ORDER_SELECTABLE) */ | |
b83ed019 ILT |
3063 | |
3064 | /* Set the endianness from a BFD. */ | |
3065 | void | |
3066 | set_endian_from_file (abfd) | |
3067 | bfd *abfd; | |
3068 | { | |
3069 | #ifdef TARGET_BYTE_ORDER_SELECTABLE | |
3070 | int want; | |
3071 | ||
3072 | if (abfd->xvec->byteorder_big_p) | |
3073 | want = BIG_ENDIAN; | |
3074 | else | |
3075 | want = LITTLE_ENDIAN; | |
3076 | if (target_byte_order_auto) | |
3077 | target_byte_order = want; | |
3078 | else if (target_byte_order != want) | |
3079 | warning ("%s endian file does not match %s endian target.", | |
3080 | want == BIG_ENDIAN ? "big" : "little", | |
3081 | TARGET_BYTE_ORDER == BIG_ENDIAN ? "big" : "little"); | |
3082 | ||
3083 | #else /* ! defined (TARGET_BYTE_ORDER_SELECTABLE) */ | |
3084 | ||
3085 | if (abfd->xvec->byteorder_big_p | |
3086 | ? TARGET_BYTE_ORDER != BIG_ENDIAN | |
3087 | : TARGET_BYTE_ORDER == BIG_ENDIAN) | |
3088 | warning ("%s endian file does not match %s endian target.", | |
688427fb | 3089 | abfd->xvec->byteorder_big_p ? "big" : "little", |
b83ed019 ILT |
3090 | TARGET_BYTE_ORDER == BIG_ENDIAN ? "big" : "little"); |
3091 | ||
3092 | #endif /* ! defined (TARGET_BYTE_ORDER_SELECTABLE) */ | |
3093 | } | |
172559ec JK |
3094 | \f |
3095 | /* Functions to manipulate command line editing control variables. */ | |
3096 | ||
3097 | /* Number of commands to print in each call to show_commands. */ | |
3098 | #define Hist_print 10 | |
3099 | static void | |
3100 | show_commands (args, from_tty) | |
3101 | char *args; | |
3102 | int from_tty; | |
3103 | { | |
3104 | /* Index for history commands. Relative to history_base. */ | |
3105 | int offset; | |
3106 | ||
3107 | /* Number of the history entry which we are planning to display next. | |
3108 | Relative to history_base. */ | |
3109 | static int num = 0; | |
3110 | ||
3111 | /* The first command in the history which doesn't exist (i.e. one more | |
3112 | than the number of the last command). Relative to history_base. */ | |
3113 | int hist_len; | |
3114 | ||
3115 | extern HIST_ENTRY *history_get PARAMS ((int)); | |
3116 | ||
3117 | /* Print out some of the commands from the command history. */ | |
3118 | /* First determine the length of the history list. */ | |
3119 | hist_len = history_size; | |
3120 | for (offset = 0; offset < history_size; offset++) | |
3121 | { | |
3122 | if (!history_get (history_base + offset)) | |
3123 | { | |
3124 | hist_len = offset; | |
3125 | break; | |
3126 | } | |
3127 | } | |
3128 | ||
3129 | if (args) | |
3130 | { | |
3131 | if (args[0] == '+' && args[1] == '\0') | |
3132 | /* "info editing +" should print from the stored position. */ | |
3133 | ; | |
3134 | else | |
3135 | /* "info editing <exp>" should print around command number <exp>. */ | |
3136 | num = (parse_and_eval_address (args) - history_base) - Hist_print / 2; | |
3137 | } | |
3138 | /* "show commands" means print the last Hist_print commands. */ | |
3139 | else | |
3140 | { | |
3141 | num = hist_len - Hist_print; | |
3142 | } | |
3143 | ||
3144 | if (num < 0) | |
3145 | num = 0; | |
3146 | ||
3147 | /* If there are at least Hist_print commands, we want to display the last | |
3148 | Hist_print rather than, say, the last 6. */ | |
3149 | if (hist_len - num < Hist_print) | |
3150 | { | |
3151 | num = hist_len - Hist_print; | |
3152 | if (num < 0) | |
3153 | num = 0; | |
3154 | } | |
3155 | ||
3156 | for (offset = num; offset < num + Hist_print && offset < hist_len; offset++) | |
3157 | { | |
3158 | printf_filtered ("%5d %s\n", history_base + offset, | |
3159 | (history_get (history_base + offset))->line); | |
3160 | } | |
3161 | ||
3162 | /* The next command we want to display is the next one that we haven't | |
3163 | displayed yet. */ | |
3164 | num += Hist_print; | |
e52bfe0c | 3165 | |
172559ec JK |
3166 | /* If the user repeats this command with return, it should do what |
3167 | "show commands +" does. This is unnecessary if arg is null, | |
3168 | because "show commands +" is not useful after "show commands". */ | |
3169 | if (from_tty && args) | |
3170 | { | |
3171 | args[0] = '+'; | |
3172 | args[1] = '\0'; | |
3173 | } | |
3174 | } | |
3175 | ||
3176 | /* Called by do_setshow_command. */ | |
3177 | /* ARGSUSED */ | |
3178 | static void | |
3179 | set_history_size_command (args, from_tty, c) | |
3180 | char *args; | |
3181 | int from_tty; | |
3182 | struct cmd_list_element *c; | |
3183 | { | |
3184 | if (history_size == INT_MAX) | |
3185 | unstifle_history (); | |
3186 | else if (history_size >= 0) | |
3187 | stifle_history (history_size); | |
3188 | else | |
3189 | { | |
3190 | history_size = INT_MAX; | |
3191 | error ("History size must be non-negative"); | |
3192 | } | |
3193 | } | |
3194 | ||
3195 | /* ARGSUSED */ | |
3196 | static void | |
3197 | set_history (args, from_tty) | |
3198 | char *args; | |
3199 | int from_tty; | |
3200 | { | |
3201 | printf_unfiltered ("\"set history\" must be followed by the name of a history subcommand.\n"); | |
3202 | help_list (sethistlist, "set history ", -1, gdb_stdout); | |
3203 | } | |
3204 | ||
3205 | /* ARGSUSED */ | |
3206 | static void | |
3207 | show_history (args, from_tty) | |
3208 | char *args; | |
3209 | int from_tty; | |
3210 | { | |
3211 | cmd_show_list (showhistlist, from_tty, ""); | |
3212 | } | |
3213 | ||
3214 | int info_verbose = 0; /* Default verbose msgs off */ | |
3215 | ||
3216 | /* Called by do_setshow_command. An elaborate joke. */ | |
3217 | /* ARGSUSED */ | |
e52bfe0c | 3218 | static void |
172559ec JK |
3219 | set_verbose (args, from_tty, c) |
3220 | char *args; | |
3221 | int from_tty; | |
3222 | struct cmd_list_element *c; | |
3223 | { | |
3224 | char *cmdname = "verbose"; | |
3225 | struct cmd_list_element *showcmd; | |
e52bfe0c | 3226 | |
172559ec JK |
3227 | showcmd = lookup_cmd_1 (&cmdname, showlist, NULL, 1); |
3228 | ||
3229 | if (info_verbose) | |
3230 | { | |
3231 | c->doc = "Set verbose printing of informational messages."; | |
3232 | showcmd->doc = "Show verbose printing of informational messages."; | |
3233 | } | |
3234 | else | |
3235 | { | |
3236 | c->doc = "Set verbosity."; | |
3237 | showcmd->doc = "Show verbosity."; | |
3238 | } | |
3239 | } | |
3240 | ||
3241 | static void | |
3242 | float_handler (signo) | |
3243 | int signo; | |
3244 | { | |
3245 | /* This message is based on ANSI C, section 4.7. Note that integer | |
3246 | divide by zero causes this, so "float" is a misnomer. */ | |
3247 | signal (SIGFPE, float_handler); | |
3248 | error ("Erroneous arithmetic operation."); | |
3249 | } | |
3250 | ||
172559ec JK |
3251 | \f |
3252 | static void | |
3253 | init_cmd_lists () | |
3254 | { | |
3255 | cmdlist = NULL; | |
3256 | infolist = NULL; | |
3257 | enablelist = NULL; | |
3258 | disablelist = NULL; | |
3259 | deletelist = NULL; | |
3260 | enablebreaklist = NULL; | |
3261 | setlist = NULL; | |
3262 | unsetlist = NULL; | |
3263 | showlist = NULL; | |
b8176214 ILT |
3264 | #ifdef TARGET_BYTE_ORDER_SELECTABLE |
3265 | endianlist = NULL; | |
3266 | #endif | |
172559ec JK |
3267 | sethistlist = NULL; |
3268 | showhistlist = NULL; | |
3269 | unsethistlist = NULL; | |
3270 | #if MAINTENANCE_CMDS | |
3271 | maintenancelist = NULL; | |
3272 | maintenanceinfolist = NULL; | |
3273 | maintenanceprintlist = NULL; | |
3274 | #endif | |
3275 | setprintlist = NULL; | |
3276 | showprintlist = NULL; | |
3277 | setchecklist = NULL; | |
3278 | showchecklist = NULL; | |
3279 | } | |
3280 | ||
3281 | /* Init the history buffer. Note that we are called after the init file(s) | |
3282 | * have been read so that the user can change the history file via his | |
3283 | * .gdbinit file (for instance). The GDBHISTFILE environment variable | |
3284 | * overrides all of this. | |
3285 | */ | |
3286 | ||
3287 | void | |
3288 | init_history() | |
3289 | { | |
3290 | char *tmpenv; | |
3291 | ||
3292 | tmpenv = getenv ("HISTSIZE"); | |
3293 | if (tmpenv) | |
3294 | history_size = atoi (tmpenv); | |
3295 | else if (!history_size) | |
3296 | history_size = 256; | |
3297 | ||
3298 | stifle_history (history_size); | |
3299 | ||
3300 | tmpenv = getenv ("GDBHISTFILE"); | |
3301 | if (tmpenv) | |
3302 | history_filename = savestring (tmpenv, strlen(tmpenv)); | |
3303 | else if (!history_filename) { | |
3304 | /* We include the current directory so that if the user changes | |
3305 | directories the file written will be the same as the one | |
3306 | that was read. */ | |
3307 | history_filename = concat (current_directory, "/.gdb_history", NULL); | |
3308 | } | |
3309 | read_history (history_filename); | |
3310 | } | |
3311 | ||
3312 | static void | |
3313 | init_main () | |
3314 | { | |
3315 | struct cmd_list_element *c; | |
e52bfe0c | 3316 | |
b8176214 ILT |
3317 | #ifdef TARGET_BYTE_ORDER_SELECTABLE |
3318 | ||
3319 | add_prefix_cmd ("endian", class_support, set_endian, | |
3320 | "Set endianness of target.", | |
3321 | &endianlist, "set endian ", 0, &setlist); | |
3322 | add_cmd ("big", class_support, set_endian_big, | |
3323 | "Set target as being big endian.", &endianlist); | |
3324 | add_cmd ("little", class_support, set_endian_little, | |
3325 | "Set target as being little endian.", &endianlist); | |
b83ed019 ILT |
3326 | add_cmd ("auto", class_support, set_endian_auto, |
3327 | "Select target endianness automatically.", &endianlist); | |
b8176214 ILT |
3328 | add_cmd ("endian", class_support, show_endian, |
3329 | "Show endianness of target.", &showlist); | |
3330 | ||
3331 | #endif /* defined (TARGET_BYTE_ORDER_SELECTABLE) */ | |
3332 | ||
172559ec JK |
3333 | #ifdef DEFAULT_PROMPT |
3334 | prompt = savestring (DEFAULT_PROMPT, strlen(DEFAULT_PROMPT)); | |
3335 | #else | |
3336 | prompt = savestring ("(gdb) ", 6); | |
3337 | #endif | |
3338 | ||
3339 | /* Set the important stuff up for command editing. */ | |
3340 | command_editing_p = 1; | |
3341 | history_expansion_p = 0; | |
3342 | write_history_p = 0; | |
e52bfe0c | 3343 | |
172559ec | 3344 | /* Setup important stuff for command line editing. */ |
9ed8604f | 3345 | rl_completion_entry_function = (int (*)()) readline_line_completion_function; |
172559ec JK |
3346 | rl_completer_word_break_characters = gdb_completer_word_break_characters; |
3347 | rl_completer_quote_characters = gdb_completer_quote_characters; | |
3348 | rl_readline_name = "gdb"; | |
3349 | ||
3350 | /* Define the classes of commands. | |
3351 | They will appear in the help list in the reverse of this order. */ | |
3352 | ||
3353 | add_cmd ("internals", class_maintenance, NO_FUNCTION, | |
3354 | "Maintenance commands.\n\ | |
3355 | Some gdb commands are provided just for use by gdb maintainers.\n\ | |
3356 | These commands are subject to frequent change, and may not be as\n\ | |
3357 | well documented as user commands.", | |
3358 | &cmdlist); | |
3359 | add_cmd ("obscure", class_obscure, NO_FUNCTION, "Obscure features.", &cmdlist); | |
3360 | add_cmd ("aliases", class_alias, NO_FUNCTION, "Aliases of other commands.", &cmdlist); | |
3361 | add_cmd ("user-defined", class_user, NO_FUNCTION, "User-defined commands.\n\ | |
3362 | The commands in this class are those defined by the user.\n\ | |
3363 | Use the \"define\" command to define a command.", &cmdlist); | |
3364 | add_cmd ("support", class_support, NO_FUNCTION, "Support facilities.", &cmdlist); | |
3365 | add_cmd ("status", class_info, NO_FUNCTION, "Status inquiries.", &cmdlist); | |
3366 | add_cmd ("files", class_files, NO_FUNCTION, "Specifying and examining files.", &cmdlist); | |
3367 | add_cmd ("breakpoints", class_breakpoint, NO_FUNCTION, "Making program stop at certain points.", &cmdlist); | |
3368 | add_cmd ("data", class_vars, NO_FUNCTION, "Examining data.", &cmdlist); | |
3369 | add_cmd ("stack", class_stack, NO_FUNCTION, "Examining the stack.\n\ | |
3370 | The stack is made up of stack frames. Gdb assigns numbers to stack frames\n\ | |
3371 | counting from zero for the innermost (currently executing) frame.\n\n\ | |
3372 | At any time gdb identifies one frame as the \"selected\" frame.\n\ | |
3373 | Variable lookups are done with respect to the selected frame.\n\ | |
3374 | When the program being debugged stops, gdb selects the innermost frame.\n\ | |
3375 | The commands below can be used to select other frames by number or address.", | |
3376 | &cmdlist); | |
3377 | add_cmd ("running", class_run, NO_FUNCTION, "Running the program.", &cmdlist); | |
3378 | ||
3379 | add_com ("pwd", class_files, pwd_command, | |
3380 | "Print working directory. This is used for your program as well."); | |
3381 | c = add_cmd ("cd", class_files, cd_command, | |
3382 | "Set working directory to DIR for debugger and program being debugged.\n\ | |
3383 | The change does not take effect for the program being debugged\n\ | |
3384 | until the next time it is started.", &cmdlist); | |
3385 | c->completer = filename_completer; | |
3386 | ||
3387 | add_show_from_set | |
3388 | (add_set_cmd ("prompt", class_support, var_string, (char *)&prompt, | |
3389 | "Set gdb's prompt", | |
3390 | &setlist), | |
3391 | &showlist); | |
e52bfe0c | 3392 | |
172559ec JK |
3393 | add_com ("echo", class_support, echo_command, |
3394 | "Print a constant string. Give string as argument.\n\ | |
3395 | C escape sequences may be used in the argument.\n\ | |
3396 | No newline is added at the end of the argument;\n\ | |
3397 | use \"\\n\" if you want a newline to be printed.\n\ | |
3398 | Since leading and trailing whitespace are ignored in command arguments,\n\ | |
3399 | if you want to print some you must use \"\\\" before leading whitespace\n\ | |
3400 | to be printed or after trailing whitespace."); | |
3401 | add_com ("document", class_support, document_command, | |
3402 | "Document a user-defined command.\n\ | |
3403 | Give command name as argument. Give documentation on following lines.\n\ | |
3404 | End with a line of just \"end\"."); | |
3405 | add_com ("define", class_support, define_command, | |
3406 | "Define a new command name. Command name is argument.\n\ | |
3407 | Definition appears on following lines, one command per line.\n\ | |
3408 | End with a line of just \"end\".\n\ | |
3409 | Use the \"document\" command to give documentation for the new command.\n\ | |
59528079 | 3410 | Commands defined in this way may have up to ten arguments."); |
172559ec JK |
3411 | |
3412 | #ifdef __STDC__ | |
3413 | c = add_cmd ("source", class_support, source_command, | |
3414 | "Read commands from a file named FILE.\n\ | |
3415 | Note that the file \"" GDBINIT_FILENAME "\" is read automatically in this way\n\ | |
3416 | when gdb is started.", &cmdlist); | |
3417 | #else | |
3418 | /* Punt file name, we can't help it easily. */ | |
3419 | c = add_cmd ("source", class_support, source_command, | |
3420 | "Read commands from a file named FILE.\n\ | |
3421 | Note that the file \".gdbinit\" is read automatically in this way\n\ | |
3422 | when gdb is started.", &cmdlist); | |
3423 | #endif | |
3424 | c->completer = filename_completer; | |
3425 | ||
3426 | add_com ("quit", class_support, quit_command, "Exit gdb."); | |
3427 | add_com ("help", class_support, help_command, "Print list of commands."); | |
3428 | add_com_alias ("q", "quit", class_support, 1); | |
3429 | add_com_alias ("h", "help", class_support, 1); | |
3430 | ||
3431 | ||
3432 | c = add_set_cmd ("verbose", class_support, var_boolean, (char *)&info_verbose, | |
3433 | "Set ", | |
3434 | &setlist), | |
3435 | add_show_from_set (c, &showlist); | |
3436 | c->function.sfunc = set_verbose; | |
3437 | set_verbose (NULL, 0, c); | |
e52bfe0c | 3438 | |
172559ec JK |
3439 | add_show_from_set |
3440 | (add_set_cmd ("editing", class_support, var_boolean, (char *)&command_editing_p, | |
3441 | "Set editing of command lines as they are typed.\n\ | |
3442 | Use \"on\" to enable to enable the editing, and \"off\" to disable it.\n\ | |
3443 | Without an argument, command line editing is enabled. To edit, use\n\ | |
3444 | EMACS-like or VI-like commands like control-P or ESC.", &setlist), | |
3445 | &showlist); | |
3446 | ||
3447 | add_prefix_cmd ("history", class_support, set_history, | |
3448 | "Generic command for setting command history parameters.", | |
3449 | &sethistlist, "set history ", 0, &setlist); | |
3450 | add_prefix_cmd ("history", class_support, show_history, | |
3451 | "Generic command for showing command history parameters.", | |
3452 | &showhistlist, "show history ", 0, &showlist); | |
3453 | ||
3454 | add_show_from_set | |
3455 | (add_set_cmd ("expansion", no_class, var_boolean, (char *)&history_expansion_p, | |
3456 | "Set history expansion on command input.\n\ | |
3457 | Without an argument, history expansion is enabled.", &sethistlist), | |
3458 | &showhistlist); | |
3459 | ||
3460 | add_show_from_set | |
3461 | (add_set_cmd ("save", no_class, var_boolean, (char *)&write_history_p, | |
3462 | "Set saving of the history record on exit.\n\ | |
3463 | Use \"on\" to enable to enable the saving, and \"off\" to disable it.\n\ | |
3464 | Without an argument, saving is enabled.", &sethistlist), | |
3465 | &showhistlist); | |
3466 | ||
3467 | c = add_set_cmd ("size", no_class, var_integer, (char *)&history_size, | |
3468 | "Set the size of the command history, \n\ | |
3469 | ie. the number of previous commands to keep a record of.", &sethistlist); | |
3470 | add_show_from_set (c, &showhistlist); | |
3471 | c->function.sfunc = set_history_size_command; | |
3472 | ||
3473 | add_show_from_set | |
3474 | (add_set_cmd ("filename", no_class, var_filename, (char *)&history_filename, | |
3475 | "Set the filename in which to record the command history\n\ | |
3476 | (the list of previous commands of which a record is kept).", &sethistlist), | |
3477 | &showhistlist); | |
3478 | ||
3479 | add_show_from_set | |
3480 | (add_set_cmd ("confirm", class_support, var_boolean, | |
3481 | (char *)&caution, | |
3482 | "Set whether to confirm potentially dangerous operations.", | |
3483 | &setlist), | |
3484 | &showlist); | |
3485 | ||
3486 | add_prefix_cmd ("info", class_info, info_command, | |
3487 | "Generic command for showing things about the program being debugged.", | |
3488 | &infolist, "info ", 0, &cmdlist); | |
3489 | add_com_alias ("i", "info", class_info, 1); | |
3490 | ||
3491 | add_com ("complete", class_obscure, complete_command, | |
3492 | "List the completions for the rest of the line as a command."); | |
3493 | ||
3494 | add_prefix_cmd ("show", class_info, show_command, | |
3495 | "Generic command for showing things about the debugger.", | |
3496 | &showlist, "show ", 0, &cmdlist); | |
3497 | /* Another way to get at the same thing. */ | |
3498 | add_info ("set", show_command, "Show all GDB settings."); | |
3499 | ||
3500 | add_cmd ("commands", no_class, show_commands, | |
3501 | "Show the the history of commands you typed.\n\ | |
3502 | You can supply a command number to start with, or a `+' to start after\n\ | |
3503 | the previous command number shown.", | |
3504 | &showlist); | |
3505 | ||
3506 | add_cmd ("version", no_class, show_version, | |
3507 | "Show what version of GDB this is.", &showlist); | |
3508 | ||
e52bfe0c JL |
3509 | add_com ("while", class_support, while_command, |
3510 | "Execute nested commands WHILE the conditional expression is non zero.\n\ | |
3511 | The conditional expression must follow the word `while' and must in turn be\ | |
3512 | followed by a new line. The nested commands must be entered one per line,\ | |
3513 | and should be terminated by the word `end'."); | |
3514 | ||
3515 | add_com ("if", class_support, if_command, | |
3516 | "Execute nested commands once IF the conditional expression is non zero.\n\ | |
3517 | The conditional expression must follow the word `if' and must in turn be\ | |
3518 | followed by a new line. The nested commands must be entered one per line,\ | |
3519 | and should be terminated by the word 'else' or `end'. If an else clause\ | |
3520 | is used, the same rules apply to its nested commands as to the first ones."); | |
3521 | ||
172559ec JK |
3522 | /* If target is open when baud changes, it doesn't take effect until the |
3523 | next open (I think, not sure). */ | |
3524 | add_show_from_set (add_set_cmd ("remotebaud", no_class, | |
3525 | var_zinteger, (char *)&baud_rate, | |
3526 | "Set baud rate for remote serial I/O.\n\ | |
3527 | This value is used to set the speed of the serial port when debugging\n\ | |
3528 | using remote targets.", &setlist), | |
3529 | &showlist); | |
3530 | ||
3531 | add_show_from_set ( | |
3532 | add_set_cmd ("remotedebug", no_class, var_zinteger, (char *)&remote_debug, | |
3533 | "Set debugging of remote protocol.\n\ | |
3534 | When enabled, each packet sent or received with the remote target\n\ | |
3535 | is displayed.", &setlist), | |
3536 | &showlist); | |
3537 | } |