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c906108c SS |
1 | /* Top level stuff for GDB, the GNU debugger. |
2 | Copyright 1986, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 1998 | |
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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, 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" | |
31 | #include "value.h" | |
32 | #include "language.h" | |
33 | #include "terminal.h" /* For job_control. */ | |
34 | #include "annotate.h" | |
c906108c | 35 | #include "top.h" |
cd0fc7c3 | 36 | #include "event-loop.h" |
c906108c SS |
37 | |
38 | /* readline include files */ | |
39 | #include <readline/readline.h> | |
40 | #include <readline/history.h> | |
41 | ||
42 | /* readline defines this. */ | |
43 | #undef savestring | |
44 | ||
45 | #include <sys/types.h> | |
46 | #ifdef HAVE_UNISTD_H | |
47 | #include <unistd.h> | |
48 | #endif | |
49 | ||
50 | #include "gdb_string.h" | |
51 | #include "gdb_stat.h" | |
52 | #include <ctype.h> | |
53 | ||
c906108c SS |
54 | /* Prototypes for local functions */ |
55 | ||
56 | static void dont_repeat_command PARAMS ((char *, int)); | |
57 | ||
58 | static void source_cleanup_lines PARAMS ((PTR)); | |
59 | ||
60 | static void user_defined_command PARAMS ((char *, int)); | |
61 | ||
62 | static void init_signals PARAMS ((void)); | |
63 | ||
64 | #ifdef STOP_SIGNAL | |
65 | static void stop_sig PARAMS ((int)); | |
66 | #endif | |
67 | ||
68 | static char * line_completion_function PARAMS ((char *, int, char *, int)); | |
69 | ||
70 | static char * readline_line_completion_function PARAMS ((char *, int)); | |
71 | ||
392a587b | 72 | /* NOTE 1999-04-29: this function will be static again, after we make the |
cd0fc7c3 SS |
73 | event loop be the default command loop for gdb, and we merge |
74 | event-top.c into this file, top.c */ | |
75 | /* static */ void command_loop_marker PARAMS ((int)); | |
76 | ||
c906108c SS |
77 | static void while_command PARAMS ((char *, int)); |
78 | ||
79 | static void if_command PARAMS ((char *, int)); | |
80 | ||
81 | static struct command_line * | |
82 | build_command_line PARAMS ((enum command_control_type, char *)); | |
83 | ||
84 | static struct command_line * | |
85 | get_command_line PARAMS ((enum command_control_type, char *)); | |
86 | ||
87 | static void realloc_body_list PARAMS ((struct command_line *, int)); | |
88 | ||
89 | static enum misc_command_type read_next_line PARAMS ((struct command_line **)); | |
90 | ||
91 | static enum command_control_type | |
92 | recurse_read_control_structure PARAMS ((struct command_line *)); | |
93 | ||
94 | static struct cleanup * setup_user_args PARAMS ((char *)); | |
95 | ||
96 | static char * locate_arg PARAMS ((char *)); | |
97 | ||
98 | static char * insert_args PARAMS ((char *)); | |
99 | ||
100 | static void arg_cleanup PARAMS ((void)); | |
101 | ||
102 | static void init_main PARAMS ((void)); | |
103 | ||
104 | static void init_cmd_lists PARAMS ((void)); | |
105 | ||
106 | static void float_handler PARAMS ((int)); | |
107 | ||
108 | static void init_signals PARAMS ((void)); | |
109 | ||
110 | static void set_verbose PARAMS ((char *, int, struct cmd_list_element *)); | |
111 | ||
112 | static void show_history PARAMS ((char *, int)); | |
113 | ||
114 | static void set_history PARAMS ((char *, int)); | |
115 | ||
116 | static void set_history_size_command PARAMS ((char *, int, | |
117 | struct cmd_list_element *)); | |
118 | ||
119 | static void show_commands PARAMS ((char *, int)); | |
120 | ||
121 | static void echo_command PARAMS ((char *, int)); | |
122 | ||
123 | static void pwd_command PARAMS ((char *, int)); | |
124 | ||
125 | static void show_version PARAMS ((char *, int)); | |
126 | ||
127 | static void document_command PARAMS ((char *, int)); | |
128 | ||
129 | static void define_command PARAMS ((char *, int)); | |
130 | ||
131 | static void validate_comname PARAMS ((char *)); | |
132 | ||
133 | static void help_command PARAMS ((char *, int)); | |
134 | ||
135 | static void show_command PARAMS ((char *, int)); | |
136 | ||
137 | static void info_command PARAMS ((char *, int)); | |
138 | ||
139 | static void complete_command PARAMS ((char *, int)); | |
140 | ||
141 | static void do_nothing PARAMS ((int)); | |
142 | ||
143 | #ifdef SIGHUP | |
392a587b | 144 | /* NOTE 1999-04-29: This function will be static again, once we modify |
cd0fc7c3 SS |
145 | gdb to use the event loop as the default command loop and we merge |
146 | event-top.c into this file, top.c */ | |
147 | /* static */ int quit_cover PARAMS ((PTR)); | |
c906108c SS |
148 | |
149 | static void disconnect PARAMS ((int)); | |
150 | #endif | |
151 | ||
152 | static void source_cleanup PARAMS ((FILE *)); | |
153 | ||
154 | /* If this definition isn't overridden by the header files, assume | |
155 | that isatty and fileno exist on this system. */ | |
156 | #ifndef ISATTY | |
157 | #define ISATTY(FP) (isatty (fileno (FP))) | |
158 | #endif | |
159 | ||
160 | /* Initialization file name for gdb. This is overridden in some configs. */ | |
161 | ||
162 | #ifndef GDBINIT_FILENAME | |
163 | #define GDBINIT_FILENAME ".gdbinit" | |
164 | #endif | |
165 | char gdbinit[] = GDBINIT_FILENAME; | |
166 | ||
167 | int inhibit_gdbinit = 0; | |
168 | ||
169 | /* If nonzero, and GDB has been configured to be able to use windows, | |
170 | attempt to open them upon startup. */ | |
171 | ||
172 | int use_windows = 1; | |
173 | ||
174 | /* Version number of GDB, as a string. */ | |
175 | ||
176 | extern char *version; | |
177 | ||
178 | /* Canonical host name as a string. */ | |
179 | ||
180 | extern char *host_name; | |
181 | ||
182 | /* Canonical target name as a string. */ | |
183 | ||
184 | extern char *target_name; | |
185 | ||
186 | extern char lang_frame_mismatch_warn[]; /* language.c */ | |
187 | ||
188 | /* Flag for whether we want all the "from_tty" gubbish printed. */ | |
189 | ||
190 | int caution = 1; /* Default is yes, sigh. */ | |
191 | ||
192 | /* Define all cmd_list_elements. */ | |
193 | ||
194 | /* Chain containing all defined commands. */ | |
195 | ||
196 | struct cmd_list_element *cmdlist; | |
197 | ||
198 | /* Chain containing all defined info subcommands. */ | |
199 | ||
200 | struct cmd_list_element *infolist; | |
201 | ||
202 | /* Chain containing all defined enable subcommands. */ | |
203 | ||
204 | struct cmd_list_element *enablelist; | |
205 | ||
206 | /* Chain containing all defined disable subcommands. */ | |
207 | ||
208 | struct cmd_list_element *disablelist; | |
209 | ||
210 | /* Chain containing all defined toggle subcommands. */ | |
211 | ||
212 | struct cmd_list_element *togglelist; | |
213 | ||
214 | /* Chain containing all defined stop subcommands. */ | |
215 | ||
216 | struct cmd_list_element *stoplist; | |
217 | ||
218 | /* Chain containing all defined delete subcommands. */ | |
219 | ||
220 | struct cmd_list_element *deletelist; | |
221 | ||
222 | /* Chain containing all defined "enable breakpoint" subcommands. */ | |
223 | ||
224 | struct cmd_list_element *enablebreaklist; | |
225 | ||
226 | /* Chain containing all defined set subcommands */ | |
227 | ||
228 | struct cmd_list_element *setlist; | |
229 | ||
230 | /* Chain containing all defined unset subcommands */ | |
231 | ||
232 | struct cmd_list_element *unsetlist; | |
233 | ||
234 | /* Chain containing all defined show subcommands. */ | |
235 | ||
236 | struct cmd_list_element *showlist; | |
237 | ||
238 | /* Chain containing all defined \"set history\". */ | |
239 | ||
240 | struct cmd_list_element *sethistlist; | |
241 | ||
242 | /* Chain containing all defined \"show history\". */ | |
243 | ||
244 | struct cmd_list_element *showhistlist; | |
245 | ||
246 | /* Chain containing all defined \"unset history\". */ | |
247 | ||
248 | struct cmd_list_element *unsethistlist; | |
249 | ||
250 | /* Chain containing all defined maintenance subcommands. */ | |
251 | ||
c906108c | 252 | struct cmd_list_element *maintenancelist; |
c906108c SS |
253 | |
254 | /* Chain containing all defined "maintenance info" subcommands. */ | |
255 | ||
c906108c | 256 | struct cmd_list_element *maintenanceinfolist; |
c906108c SS |
257 | |
258 | /* Chain containing all defined "maintenance print" subcommands. */ | |
259 | ||
c906108c | 260 | struct cmd_list_element *maintenanceprintlist; |
c906108c SS |
261 | |
262 | struct cmd_list_element *setprintlist; | |
263 | ||
264 | struct cmd_list_element *showprintlist; | |
265 | ||
266 | struct cmd_list_element *setchecklist; | |
267 | ||
268 | struct cmd_list_element *showchecklist; | |
269 | ||
270 | /* stdio stream that command input is being read from. Set to stdin normally. | |
271 | Set by source_command to the file we are sourcing. Set to NULL if we are | |
272 | executing a user-defined command or interacting via a GUI. */ | |
273 | ||
274 | FILE *instream; | |
275 | ||
276 | /* Current working directory. */ | |
277 | ||
278 | char *current_directory; | |
279 | ||
280 | /* The directory name is actually stored here (usually). */ | |
281 | char gdb_dirbuf[1024]; | |
282 | ||
283 | /* Function to call before reading a command, if nonzero. | |
284 | The function receives two args: an input stream, | |
285 | and a prompt string. */ | |
286 | ||
287 | void (*window_hook) PARAMS ((FILE *, char *)); | |
288 | ||
289 | int epoch_interface; | |
290 | int xgdb_verbose; | |
291 | ||
292 | /* gdb prints this when reading a command interactively */ | |
0f71a2f6 JM |
293 | static char *gdb_prompt_string; /* the global prompt string */ |
294 | extern char *get_prompt PARAMS((void)); /* access function for prompt string */ | |
c906108c SS |
295 | |
296 | /* Buffer used for reading command lines, and the size | |
297 | allocated for it so far. */ | |
298 | ||
299 | char *line; | |
300 | int linesize = 100; | |
301 | ||
302 | /* Nonzero if the current command is modified by "server ". This | |
303 | affects things like recording into the command history, comamnds | |
304 | repeating on RETURN, etc. This is so a user interface (emacs, GUI, | |
305 | whatever) can issue its own commands and also send along commands | |
306 | from the user, and have the user not notice that the user interface | |
307 | is issuing commands too. */ | |
308 | int server_command; | |
309 | ||
310 | /* Baud rate specified for talking to serial target systems. Default | |
311 | is left as -1, so targets can choose their own defaults. */ | |
312 | /* FIXME: This means that "show remotebaud" and gr_files_info can print -1 | |
313 | or (unsigned int)-1. This is a Bad User Interface. */ | |
314 | ||
315 | int baud_rate = -1; | |
316 | ||
317 | /* Timeout limit for response from target. */ | |
318 | ||
319 | int remote_timeout = 20; /* Set default to 20 */ | |
320 | ||
321 | /* Non-zero tells remote* modules to output debugging info. */ | |
322 | ||
323 | int remote_debug = 0; | |
324 | ||
325 | /* Level of control structure. */ | |
326 | static int control_level; | |
327 | ||
328 | /* Structure for arguments to user defined functions. */ | |
329 | #define MAXUSERARGS 10 | |
330 | struct user_args | |
331 | { | |
332 | struct user_args *next; | |
333 | struct | |
334 | { | |
335 | char *arg; | |
336 | int len; | |
337 | } a[MAXUSERARGS]; | |
338 | int count; | |
339 | } *user_args; | |
340 | ||
341 | /* Signal to catch ^Z typed while reading a command: SIGTSTP or SIGCONT. */ | |
342 | ||
343 | #ifndef STOP_SIGNAL | |
344 | #ifdef SIGTSTP | |
345 | #define STOP_SIGNAL SIGTSTP | |
346 | static void stop_sig PARAMS ((int)); | |
347 | #endif | |
348 | #endif | |
349 | ||
350 | /* Some System V have job control but not sigsetmask(). */ | |
351 | #if !defined (HAVE_SIGSETMASK) | |
352 | #if !defined (USG) | |
353 | #define HAVE_SIGSETMASK 1 | |
354 | #else | |
355 | #define HAVE_SIGSETMASK 0 | |
356 | #endif | |
357 | #endif | |
358 | ||
359 | #if 0 == (HAVE_SIGSETMASK) | |
360 | #define sigsetmask(n) | |
361 | #endif | |
362 | ||
363 | /* Hooks for alternate command interfaces. */ | |
364 | ||
365 | /* Called after most modules have been initialized, but before taking users | |
366 | command file. */ | |
367 | ||
368 | void (*init_ui_hook) PARAMS ((char *argv0)); | |
7a292a7a SS |
369 | |
370 | /* This hook is called from within gdb's many mini-event loops which could | |
371 | steal control from a real user interface's event loop. It returns | |
372 | non-zero if the user is requesting a detach, zero otherwise. */ | |
373 | ||
374 | int (*ui_loop_hook) PARAMS ((int)); | |
c906108c SS |
375 | |
376 | /* Called instead of command_loop at top level. Can be invoked via | |
377 | return_to_top_level. */ | |
378 | ||
379 | void (*command_loop_hook) PARAMS ((void)); | |
380 | ||
381 | ||
382 | /* Called instead of fputs for all output. */ | |
383 | ||
384 | void (*fputs_unfiltered_hook) PARAMS ((const char *linebuffer, GDB_FILE *stream)); | |
385 | ||
386 | /* Called when the target says something to the host, which may | |
387 | want to appear in a different window. */ | |
388 | ||
389 | void (*target_output_hook) PARAMS ((char *)); | |
390 | ||
391 | /* Called from print_frame_info to list the line we stopped in. */ | |
392 | ||
393 | void (*print_frame_info_listing_hook) PARAMS ((struct symtab *s, int line, | |
394 | int stopline, int noerror)); | |
395 | /* Replaces most of query. */ | |
396 | ||
397 | int (*query_hook) PARAMS ((const char *, va_list)); | |
398 | ||
399 | /* Replaces most of warning. */ | |
400 | ||
401 | void (*warning_hook) PARAMS ((const char *, va_list)); | |
402 | ||
403 | /* Called from gdb_flush to flush output. */ | |
404 | ||
405 | void (*flush_hook) PARAMS ((GDB_FILE *stream)); | |
406 | ||
407 | /* These three functions support getting lines of text from the user. They | |
408 | are used in sequence. First readline_begin_hook is called with a text | |
409 | string that might be (for example) a message for the user to type in a | |
410 | sequence of commands to be executed at a breakpoint. If this function | |
411 | calls back to a GUI, it might take this opportunity to pop up a text | |
412 | interaction window with this message. Next, readline_hook is called | |
413 | with a prompt that is emitted prior to collecting the user input. | |
414 | It can be called multiple times. Finally, readline_end_hook is called | |
415 | to notify the GUI that we are done with the interaction window and it | |
416 | can close it. */ | |
417 | ||
418 | void (*readline_begin_hook) PARAMS ((char *, ...)); | |
419 | char * (*readline_hook) PARAMS ((char *)); | |
420 | void (*readline_end_hook) PARAMS ((void)); | |
421 | ||
422 | /* Called as appropriate to notify the interface of the specified breakpoint | |
423 | conditions. */ | |
424 | ||
425 | void (*create_breakpoint_hook) PARAMS ((struct breakpoint *bpt)); | |
426 | void (*delete_breakpoint_hook) PARAMS ((struct breakpoint *bpt)); | |
427 | void (*modify_breakpoint_hook) PARAMS ((struct breakpoint *bpt)); | |
428 | ||
429 | /* Called during long calculations to allow GUI to repair window damage, and to | |
430 | check for stop buttons, etc... */ | |
431 | ||
432 | void (*interactive_hook) PARAMS ((void)); | |
433 | ||
434 | /* Called when the registers have changed, as a hint to a GUI | |
435 | to minimize window update. */ | |
436 | ||
437 | void (*registers_changed_hook) PARAMS ((void)); | |
438 | ||
439 | /* Tell the GUI someone changed the register REGNO. -1 means | |
440 | that the caller does not know which register changed or | |
441 | that several registers have changed (see value_assign).*/ | |
442 | void (*register_changed_hook) PARAMS ((int regno)); | |
443 | ||
444 | /* Tell the GUI someone changed LEN bytes of memory at ADDR */ | |
445 | void (*memory_changed_hook) PARAMS ((CORE_ADDR addr, int len)); | |
446 | ||
447 | /* Called when going to wait for the target. Usually allows the GUI to run | |
448 | while waiting for target events. */ | |
449 | ||
450 | int (*target_wait_hook) PARAMS ((int pid, struct target_waitstatus *status)); | |
451 | ||
452 | /* Used by UI as a wrapper around command execution. May do various things | |
453 | like enabling/disabling buttons, etc... */ | |
454 | ||
455 | void (*call_command_hook) PARAMS ((struct cmd_list_element *c, char *cmd, | |
456 | int from_tty)); | |
457 | ||
458 | /* Called when the current thread changes. Argument is thread id. */ | |
459 | ||
460 | void (*context_hook) PARAMS ((int id)); | |
461 | ||
462 | /* Takes control from error (). Typically used to prevent longjmps out of the | |
463 | middle of the GUI. Usually used in conjunction with a catch routine. */ | |
464 | ||
465 | NORETURN void (*error_hook) PARAMS ((void)) ATTR_NORETURN; | |
466 | ||
467 | \f | |
468 | /* Where to go for return_to_top_level (RETURN_ERROR). */ | |
469 | SIGJMP_BUF error_return; | |
470 | /* Where to go for return_to_top_level (RETURN_QUIT). */ | |
471 | SIGJMP_BUF quit_return; | |
472 | ||
473 | /* Return for reason REASON. This generally gets back to the command | |
474 | loop, but can be caught via catch_errors. */ | |
475 | ||
476 | NORETURN void | |
477 | return_to_top_level (reason) | |
478 | enum return_reason reason; | |
479 | { | |
480 | quit_flag = 0; | |
481 | immediate_quit = 0; | |
482 | ||
483 | /* Perhaps it would be cleaner to do this via the cleanup chain (not sure | |
484 | I can think of a reason why that is vital, though). */ | |
485 | bpstat_clear_actions(stop_bpstat); /* Clear queued breakpoint commands */ | |
486 | ||
487 | disable_current_display (); | |
488 | do_cleanups (ALL_CLEANUPS); | |
489 | ||
490 | if (annotation_level > 1) | |
491 | switch (reason) | |
492 | { | |
493 | case RETURN_QUIT: | |
494 | annotate_quit (); | |
495 | break; | |
496 | case RETURN_ERROR: | |
497 | annotate_error (); | |
498 | break; | |
499 | } | |
500 | ||
501 | (NORETURN void) SIGLONGJMP | |
502 | (reason == RETURN_ERROR ? error_return : quit_return, 1); | |
503 | } | |
504 | ||
505 | /* Call FUNC with arg ARGS, catching any errors. If there is no | |
506 | error, return the value returned by FUNC. If there is an error, | |
507 | print ERRSTRING, print the specific error message, then return | |
508 | zero. | |
509 | ||
510 | Must not be called with immediate_quit in effect (bad things might | |
511 | happen, say we got a signal in the middle of a memcpy to quit_return). | |
512 | This is an OK restriction; with very few exceptions immediate_quit can | |
513 | be replaced by judicious use of QUIT. | |
514 | ||
515 | MASK specifies what to catch; it is normally set to | |
516 | RETURN_MASK_ALL, if for no other reason than that the code which | |
517 | calls catch_errors might not be set up to deal with a quit which | |
518 | isn't caught. But if the code can deal with it, it generally | |
519 | should be RETURN_MASK_ERROR, unless for some reason it is more | |
520 | useful to abort only the portion of the operation inside the | |
521 | catch_errors. Note that quit should return to the command line | |
522 | fairly quickly, even if some further processing is being done. */ | |
523 | ||
524 | int | |
525 | catch_errors (func, args, errstring, mask) | |
526 | catch_errors_ftype *func; | |
527 | PTR args; | |
528 | char *errstring; | |
529 | return_mask mask; | |
530 | { | |
531 | SIGJMP_BUF saved_error; | |
532 | SIGJMP_BUF saved_quit; | |
533 | SIGJMP_BUF tmp_jmp; | |
534 | int val; | |
535 | struct cleanup *saved_cleanup_chain; | |
536 | char *saved_error_pre_print; | |
537 | char *saved_quit_pre_print; | |
538 | ||
539 | saved_cleanup_chain = save_cleanups (); | |
540 | saved_error_pre_print = error_pre_print; | |
541 | saved_quit_pre_print = quit_pre_print; | |
542 | ||
543 | if (mask & RETURN_MASK_ERROR) | |
544 | { | |
545 | memcpy ((char *)saved_error, (char *)error_return, sizeof (SIGJMP_BUF)); | |
546 | error_pre_print = errstring; | |
547 | } | |
548 | if (mask & RETURN_MASK_QUIT) | |
549 | { | |
550 | memcpy (saved_quit, quit_return, sizeof (SIGJMP_BUF)); | |
551 | quit_pre_print = errstring; | |
552 | } | |
553 | ||
554 | if (SIGSETJMP (tmp_jmp) == 0) | |
555 | { | |
556 | if (mask & RETURN_MASK_ERROR) | |
557 | memcpy (error_return, tmp_jmp, sizeof (SIGJMP_BUF)); | |
558 | if (mask & RETURN_MASK_QUIT) | |
559 | memcpy (quit_return, tmp_jmp, sizeof (SIGJMP_BUF)); | |
560 | val = (*func) (args); | |
561 | } | |
562 | else | |
563 | val = 0; | |
564 | ||
565 | restore_cleanups (saved_cleanup_chain); | |
566 | ||
567 | if (mask & RETURN_MASK_ERROR) | |
568 | { | |
569 | memcpy (error_return, saved_error, sizeof (SIGJMP_BUF)); | |
570 | error_pre_print = saved_error_pre_print; | |
571 | } | |
572 | if (mask & RETURN_MASK_QUIT) | |
573 | { | |
574 | memcpy (quit_return, saved_quit, sizeof (SIGJMP_BUF)); | |
575 | quit_pre_print = saved_quit_pre_print; | |
576 | } | |
577 | return val; | |
578 | } | |
579 | ||
580 | /* Handler for SIGHUP. */ | |
581 | ||
582 | #ifdef SIGHUP | |
583 | static void | |
584 | disconnect (signo) | |
585 | int signo; | |
586 | { | |
587 | catch_errors (quit_cover, NULL, | |
588 | "Could not kill the program being debugged", RETURN_MASK_ALL); | |
589 | signal (SIGHUP, SIG_DFL); | |
590 | kill (getpid (), SIGHUP); | |
591 | } | |
592 | ||
593 | /* Just a little helper function for disconnect(). */ | |
594 | ||
392a587b | 595 | /* NOTE 1999-04-29: This function will be static again, once we modify |
cd0fc7c3 SS |
596 | gdb to use the event loop as the default command loop and we merge |
597 | event-top.c into this file, top.c */ | |
598 | /* static */ int | |
c906108c SS |
599 | quit_cover (s) |
600 | PTR s; | |
601 | { | |
602 | caution = 0; /* Throw caution to the wind -- we're exiting. | |
603 | This prevents asking the user dumb questions. */ | |
604 | quit_command((char *)0, 0); | |
605 | return 0; | |
606 | } | |
607 | #endif /* defined SIGHUP */ | |
608 | \f | |
609 | /* Line number we are currently in in a file which is being sourced. */ | |
392a587b | 610 | /* NOTE 1999-04-29: This variable will be static again, once we modify |
cd0fc7c3 SS |
611 | gdb to use the event loop as the default command loop and we merge |
612 | event-top.c into this file, top.c */ | |
613 | /* static */ int source_line_number; | |
c906108c SS |
614 | |
615 | /* Name of the file we are sourcing. */ | |
392a587b | 616 | /* NOTE 1999-04-29: This variable will be static again, once we modify |
cd0fc7c3 SS |
617 | gdb to use the event loop as the default command loop and we merge |
618 | event-top.c into this file, top.c */ | |
619 | /* static */ char *source_file_name; | |
c906108c SS |
620 | |
621 | /* Buffer containing the error_pre_print used by the source stuff. | |
622 | Malloc'd. */ | |
392a587b | 623 | /* NOTE 1999-04-29: This variable will be static again, once we modify |
cd0fc7c3 SS |
624 | gdb to use the event loop as the default command loop and we merge |
625 | event-top.c into this file, top.c */ | |
626 | /* static */ char *source_error; | |
c906108c SS |
627 | static int source_error_allocated; |
628 | ||
629 | /* Something to glom on to the start of error_pre_print if source_file_name | |
630 | is set. */ | |
392a587b | 631 | /* NOTE 1999-04-29: This variable will be static again, once we modify |
cd0fc7c3 SS |
632 | gdb to use the event loop as the default command loop and we merge |
633 | event-top.c into this file, top.c */ | |
634 | /* static */ char *source_pre_error; | |
c906108c SS |
635 | |
636 | /* Clean up on error during a "source" command (or execution of a | |
637 | user-defined command). */ | |
638 | ||
639 | static void | |
640 | source_cleanup (stream) | |
641 | FILE *stream; | |
642 | { | |
643 | /* Restore the previous input stream. */ | |
644 | instream = stream; | |
645 | } | |
646 | ||
647 | /* Read commands from STREAM. */ | |
648 | void | |
649 | read_command_file (stream) | |
650 | FILE *stream; | |
651 | { | |
652 | struct cleanup *cleanups; | |
653 | ||
654 | cleanups = make_cleanup ((make_cleanup_func) source_cleanup, instream); | |
655 | instream = stream; | |
0f71a2f6 | 656 | command_loop (); |
c906108c SS |
657 | do_cleanups (cleanups); |
658 | } | |
659 | \f | |
660 | extern void init_proc PARAMS ((void)); | |
661 | ||
662 | void (*pre_init_ui_hook) PARAMS ((void)); | |
663 | ||
664 | void | |
665 | gdb_init (argv0) | |
666 | char *argv0; | |
667 | { | |
668 | if (pre_init_ui_hook) | |
669 | pre_init_ui_hook (); | |
670 | ||
671 | /* Run the init function of each source file */ | |
672 | ||
673 | getcwd (gdb_dirbuf, sizeof (gdb_dirbuf)); | |
674 | current_directory = gdb_dirbuf; | |
675 | ||
676 | init_cmd_lists (); /* This needs to be done first */ | |
677 | initialize_targets (); /* Setup target_terminal macros for utils.c */ | |
678 | initialize_utils (); /* Make errors and warnings possible */ | |
679 | initialize_all_files (); | |
680 | init_main (); /* But that omits this file! Do it now */ | |
cd0fc7c3 SS |
681 | |
682 | /* The signal handling mechanism is different depending whether or | |
683 | not the async version is run. NOTE: in the future we plan to make | |
684 | the event loop be the default engine of gdb, and this difference | |
685 | will disappear. */ | |
0f71a2f6 | 686 | if (async_p) |
cd0fc7c3 SS |
687 | async_init_signals (); |
688 | else | |
0f71a2f6 | 689 | init_signals (); |
c906108c | 690 | |
c906108c SS |
691 | /* We need a default language for parsing expressions, so simple things like |
692 | "set width 0" won't fail if no language is explicitly set in a config file | |
693 | or implicitly set by reading an executable during startup. */ | |
694 | set_language (language_c); | |
695 | expected_language = current_language; /* don't warn about the change. */ | |
696 | ||
0f71a2f6 JM |
697 | /* All the interpreters should have had a look at things by now. |
698 | Initialize the selected interpreter. */ | |
c906108c SS |
699 | if (init_ui_hook) |
700 | init_ui_hook (argv0); | |
701 | } | |
702 | ||
703 | /* Allocate, initialize a new command line structure for one of the | |
704 | control commands (if/while). */ | |
705 | ||
706 | static struct command_line * | |
707 | build_command_line (type, args) | |
708 | enum command_control_type type; | |
709 | char *args; | |
710 | { | |
711 | struct command_line *cmd; | |
712 | ||
713 | if (args == NULL) | |
714 | error ("if/while commands require arguments.\n"); | |
715 | ||
716 | cmd = (struct command_line *)xmalloc (sizeof (struct command_line)); | |
717 | cmd->next = NULL; | |
718 | cmd->control_type = type; | |
719 | ||
720 | cmd->body_count = 1; | |
721 | cmd->body_list | |
722 | = (struct command_line **)xmalloc (sizeof (struct command_line *) | |
723 | * cmd->body_count); | |
724 | memset (cmd->body_list, 0, sizeof (struct command_line *) * cmd->body_count); | |
725 | cmd->line = savestring (args, strlen (args)); | |
726 | return cmd; | |
727 | } | |
728 | ||
729 | /* Build and return a new command structure for the control commands | |
730 | such as "if" and "while". */ | |
731 | ||
732 | static struct command_line * | |
733 | get_command_line (type, arg) | |
734 | enum command_control_type type; | |
735 | char *arg; | |
736 | { | |
737 | struct command_line *cmd; | |
738 | struct cleanup *old_chain = NULL; | |
739 | ||
740 | /* Allocate and build a new command line structure. */ | |
741 | cmd = build_command_line (type, arg); | |
742 | ||
743 | old_chain = make_cleanup ((make_cleanup_func) free_command_lines, &cmd); | |
744 | ||
745 | /* Read in the body of this command. */ | |
746 | if (recurse_read_control_structure (cmd) == invalid_control) | |
747 | { | |
748 | warning ("error reading in control structure\n"); | |
749 | do_cleanups (old_chain); | |
750 | return NULL; | |
751 | } | |
752 | ||
753 | discard_cleanups (old_chain); | |
754 | return cmd; | |
755 | } | |
756 | ||
757 | /* Recursively print a command (including full control structures). */ | |
758 | void | |
9e086581 | 759 | print_command_line (cmd, depth, stream) |
c906108c SS |
760 | struct command_line *cmd; |
761 | unsigned int depth; | |
9e086581 | 762 | GDB_FILE *stream; |
c906108c SS |
763 | { |
764 | unsigned int i; | |
765 | ||
766 | if (depth) | |
767 | { | |
768 | for (i = 0; i < depth; i++) | |
9e086581 | 769 | fputs_filtered (" ", stream); |
c906108c SS |
770 | } |
771 | ||
772 | /* A simple command, print it and return. */ | |
773 | if (cmd->control_type == simple_control) | |
774 | { | |
9e086581 JM |
775 | fputs_filtered (cmd->line, stream); |
776 | fputs_filtered ("\n", stream); | |
c906108c SS |
777 | return; |
778 | } | |
779 | ||
780 | /* loop_continue to jump to the start of a while loop, print it | |
781 | and return. */ | |
782 | if (cmd->control_type == continue_control) | |
783 | { | |
9e086581 | 784 | fputs_filtered ("loop_continue\n", stream); |
c906108c SS |
785 | return; |
786 | } | |
787 | ||
788 | /* loop_break to break out of a while loop, print it and return. */ | |
789 | if (cmd->control_type == break_control) | |
790 | { | |
9e086581 | 791 | fputs_filtered ("loop_break\n", stream); |
c906108c SS |
792 | return; |
793 | } | |
794 | ||
795 | /* A while command. Recursively print its subcommands before returning. */ | |
796 | if (cmd->control_type == while_control) | |
797 | { | |
798 | struct command_line *list; | |
9e086581 JM |
799 | fputs_filtered ("while ", stream); |
800 | fputs_filtered (cmd->line, stream); | |
801 | fputs_filtered ("\n", stream); | |
c906108c SS |
802 | list = *cmd->body_list; |
803 | while (list) | |
804 | { | |
9e086581 | 805 | print_command_line (list, depth + 1, stream); |
c906108c SS |
806 | list = list->next; |
807 | } | |
808 | } | |
809 | ||
810 | /* An if command. Recursively print both arms before returning. */ | |
811 | if (cmd->control_type == if_control) | |
812 | { | |
9e086581 JM |
813 | fputs_filtered ("if ", stream); |
814 | fputs_filtered (cmd->line, stream); | |
815 | fputs_filtered ("\n", stream); | |
c906108c | 816 | /* The true arm. */ |
9e086581 | 817 | print_command_line (cmd->body_list[0], depth + 1, stream); |
c906108c SS |
818 | |
819 | /* Show the false arm if it exists. */ | |
820 | if (cmd->body_count == 2) | |
821 | { | |
822 | if (depth) | |
823 | { | |
824 | for (i = 0; i < depth; i++) | |
9e086581 | 825 | fputs_filtered (" ", stream); |
c906108c | 826 | } |
9e086581 JM |
827 | fputs_filtered ("else\n", stream); |
828 | print_command_line (cmd->body_list[1], depth + 1, stream); | |
c906108c SS |
829 | } |
830 | if (depth) | |
831 | { | |
832 | for (i = 0; i < depth; i++) | |
9e086581 | 833 | fputs_filtered (" ", stream); |
c906108c | 834 | } |
9e086581 | 835 | fputs_filtered ("end\n", stream); |
c906108c SS |
836 | } |
837 | } | |
838 | ||
839 | /* Execute the command in CMD. */ | |
840 | ||
841 | enum command_control_type | |
842 | execute_control_command (cmd) | |
843 | struct command_line *cmd; | |
844 | { | |
845 | struct expression *expr; | |
846 | struct command_line *current; | |
847 | struct cleanup *old_chain = 0; | |
848 | value_ptr val; | |
849 | value_ptr val_mark; | |
850 | int loop; | |
851 | enum command_control_type ret; | |
852 | char *new_line; | |
853 | ||
854 | switch (cmd->control_type) | |
855 | { | |
856 | case simple_control: | |
857 | /* A simple command, execute it and return. */ | |
858 | new_line = insert_args (cmd->line); | |
859 | if (!new_line) | |
860 | return invalid_control; | |
861 | old_chain = make_cleanup ((make_cleanup_func) free_current_contents, | |
862 | &new_line); | |
863 | execute_command (new_line, 0); | |
864 | ret = cmd->control_type; | |
865 | break; | |
866 | ||
867 | case continue_control: | |
868 | case break_control: | |
869 | /* Return for "continue", and "break" so we can either | |
870 | continue the loop at the top, or break out. */ | |
871 | ret = cmd->control_type; | |
872 | break; | |
873 | ||
874 | case while_control: | |
875 | { | |
876 | /* Parse the loop control expression for the while statement. */ | |
877 | new_line = insert_args (cmd->line); | |
878 | if (!new_line) | |
879 | return invalid_control; | |
880 | old_chain = make_cleanup ((make_cleanup_func) free_current_contents, | |
881 | &new_line); | |
882 | expr = parse_expression (new_line); | |
883 | make_cleanup ((make_cleanup_func) free_current_contents, &expr); | |
884 | ||
885 | ret = simple_control; | |
886 | loop = 1; | |
887 | ||
888 | /* Keep iterating so long as the expression is true. */ | |
889 | while (loop == 1) | |
890 | { | |
891 | int cond_result; | |
892 | ||
893 | QUIT; | |
894 | ||
895 | /* Evaluate the expression. */ | |
896 | val_mark = value_mark (); | |
897 | val = evaluate_expression (expr); | |
898 | cond_result = value_true (val); | |
899 | value_free_to_mark (val_mark); | |
900 | ||
901 | /* If the value is false, then break out of the loop. */ | |
902 | if (!cond_result) | |
903 | break; | |
904 | ||
905 | /* Execute the body of the while statement. */ | |
906 | current = *cmd->body_list; | |
907 | while (current) | |
908 | { | |
909 | ret = execute_control_command (current); | |
910 | ||
911 | /* If we got an error, or a "break" command, then stop | |
912 | looping. */ | |
913 | if (ret == invalid_control || ret == break_control) | |
914 | { | |
915 | loop = 0; | |
916 | break; | |
917 | } | |
918 | ||
919 | /* If we got a "continue" command, then restart the loop | |
920 | at this point. */ | |
921 | if (ret == continue_control) | |
922 | break; | |
923 | ||
924 | /* Get the next statement. */ | |
925 | current = current->next; | |
926 | } | |
927 | } | |
928 | ||
929 | /* Reset RET so that we don't recurse the break all the way down. */ | |
930 | if (ret == break_control) | |
931 | ret = simple_control; | |
932 | ||
933 | break; | |
934 | } | |
935 | ||
936 | case if_control: | |
937 | { | |
938 | new_line = insert_args (cmd->line); | |
939 | if (!new_line) | |
940 | return invalid_control; | |
941 | old_chain = make_cleanup ((make_cleanup_func) free_current_contents, | |
942 | &new_line); | |
943 | /* Parse the conditional for the if statement. */ | |
944 | expr = parse_expression (new_line); | |
945 | make_cleanup ((make_cleanup_func) free_current_contents, &expr); | |
946 | ||
947 | current = NULL; | |
948 | ret = simple_control; | |
949 | ||
950 | /* Evaluate the conditional. */ | |
951 | val_mark = value_mark (); | |
952 | val = evaluate_expression (expr); | |
953 | ||
954 | /* Choose which arm to take commands from based on the value of the | |
955 | conditional expression. */ | |
956 | if (value_true (val)) | |
957 | current = *cmd->body_list; | |
958 | else if (cmd->body_count == 2) | |
959 | current = *(cmd->body_list + 1); | |
960 | value_free_to_mark (val_mark); | |
961 | ||
962 | /* Execute commands in the given arm. */ | |
963 | while (current) | |
964 | { | |
965 | ret = execute_control_command (current); | |
966 | ||
967 | /* If we got an error, get out. */ | |
968 | if (ret != simple_control) | |
969 | break; | |
970 | ||
971 | /* Get the next statement in the body. */ | |
972 | current = current->next; | |
973 | } | |
974 | ||
975 | break; | |
976 | } | |
977 | ||
978 | default: | |
979 | warning ("Invalid control type in command structure."); | |
980 | return invalid_control; | |
981 | } | |
982 | ||
983 | if (old_chain) | |
984 | do_cleanups (old_chain); | |
985 | ||
986 | return ret; | |
987 | } | |
988 | ||
989 | /* "while" command support. Executes a body of statements while the | |
990 | loop condition is nonzero. */ | |
991 | ||
992 | static void | |
993 | while_command (arg, from_tty) | |
994 | char *arg; | |
995 | int from_tty; | |
996 | { | |
997 | struct command_line *command = NULL; | |
998 | ||
999 | control_level = 1; | |
1000 | command = get_command_line (while_control, arg); | |
1001 | ||
1002 | if (command == NULL) | |
1003 | return; | |
1004 | ||
1005 | execute_control_command (command); | |
1006 | free_command_lines (&command); | |
1007 | } | |
1008 | ||
1009 | /* "if" command support. Execute either the true or false arm depending | |
1010 | on the value of the if conditional. */ | |
1011 | ||
1012 | static void | |
1013 | if_command (arg, from_tty) | |
1014 | char *arg; | |
1015 | int from_tty; | |
1016 | { | |
1017 | struct command_line *command = NULL; | |
1018 | ||
1019 | control_level = 1; | |
1020 | command = get_command_line (if_control, arg); | |
1021 | ||
1022 | if (command == NULL) | |
1023 | return; | |
1024 | ||
1025 | execute_control_command (command); | |
1026 | free_command_lines (&command); | |
1027 | } | |
1028 | ||
1029 | /* Cleanup */ | |
1030 | static void | |
1031 | arg_cleanup () | |
1032 | { | |
1033 | struct user_args *oargs = user_args; | |
1034 | if (!user_args) | |
1035 | fatal ("Internal error, arg_cleanup called with no user args.\n"); | |
1036 | ||
1037 | user_args = user_args->next; | |
1038 | free (oargs); | |
1039 | } | |
1040 | ||
1041 | /* Bind the incomming arguments for a user defined command to | |
1042 | $arg0, $arg1 ... $argMAXUSERARGS. */ | |
1043 | ||
1044 | static struct cleanup * | |
1045 | setup_user_args (p) | |
1046 | char *p; | |
1047 | { | |
1048 | struct user_args *args; | |
1049 | struct cleanup *old_chain; | |
1050 | unsigned int arg_count = 0; | |
1051 | ||
1052 | args = (struct user_args *)xmalloc (sizeof (struct user_args)); | |
1053 | memset (args, 0, sizeof (struct user_args)); | |
1054 | ||
1055 | args->next = user_args; | |
1056 | user_args = args; | |
1057 | ||
1058 | old_chain = make_cleanup ((make_cleanup_func) arg_cleanup, 0); | |
1059 | ||
1060 | if (p == NULL) | |
1061 | return old_chain; | |
1062 | ||
1063 | while (*p) | |
1064 | { | |
1065 | char *start_arg; | |
1066 | int squote = 0; | |
1067 | int dquote = 0; | |
1068 | int bsquote = 0; | |
1069 | ||
1070 | if (arg_count >= MAXUSERARGS) | |
1071 | { | |
1072 | error ("user defined function may only have %d arguments.\n", | |
1073 | MAXUSERARGS); | |
1074 | return old_chain; | |
1075 | } | |
1076 | ||
1077 | /* Strip whitespace. */ | |
1078 | while (*p == ' ' || *p == '\t') | |
1079 | p++; | |
1080 | ||
1081 | /* P now points to an argument. */ | |
1082 | start_arg = p; | |
1083 | user_args->a[arg_count].arg = p; | |
1084 | ||
1085 | /* Get to the end of this argument. */ | |
1086 | while (*p) | |
1087 | { | |
1088 | if (((*p == ' ' || *p == '\t')) && !squote && !dquote && !bsquote) | |
1089 | break; | |
1090 | else | |
1091 | { | |
1092 | if (bsquote) | |
1093 | bsquote = 0; | |
1094 | else if (*p == '\\') | |
1095 | bsquote = 1; | |
1096 | else if (squote) | |
1097 | { | |
1098 | if (*p == '\'') | |
1099 | squote = 0; | |
1100 | } | |
1101 | else if (dquote) | |
1102 | { | |
1103 | if (*p == '"') | |
1104 | dquote = 0; | |
1105 | } | |
1106 | else | |
1107 | { | |
1108 | if (*p == '\'') | |
1109 | squote = 1; | |
1110 | else if (*p == '"') | |
1111 | dquote = 1; | |
1112 | } | |
1113 | p++; | |
1114 | } | |
1115 | } | |
1116 | ||
1117 | user_args->a[arg_count].len = p - start_arg; | |
1118 | arg_count++; | |
1119 | user_args->count++; | |
1120 | } | |
1121 | return old_chain; | |
1122 | } | |
1123 | ||
1124 | /* Given character string P, return a point to the first argument ($arg), | |
1125 | or NULL if P contains no arguments. */ | |
1126 | ||
1127 | static char * | |
1128 | locate_arg (p) | |
1129 | char *p; | |
1130 | { | |
1131 | while ((p = strchr (p, '$'))) | |
1132 | { | |
1133 | if (strncmp (p, "$arg", 4) == 0 && isdigit (p[4])) | |
1134 | return p; | |
1135 | p++; | |
1136 | } | |
1137 | return NULL; | |
1138 | } | |
1139 | ||
1140 | /* Insert the user defined arguments stored in user_arg into the $arg | |
1141 | arguments found in line, with the updated copy being placed into nline. */ | |
1142 | ||
1143 | static char * | |
1144 | insert_args (line) | |
1145 | char *line; | |
1146 | { | |
1147 | char *p, *save_line, *new_line; | |
1148 | unsigned len, i; | |
1149 | ||
1150 | /* First we need to know how much memory to allocate for the new line. */ | |
1151 | save_line = line; | |
1152 | len = 0; | |
1153 | while ((p = locate_arg (line))) | |
1154 | { | |
1155 | len += p - line; | |
1156 | i = p[4] - '0'; | |
1157 | ||
1158 | if (i >= user_args->count) | |
1159 | { | |
1160 | error ("Missing argument %d in user function.\n", i); | |
1161 | return NULL; | |
1162 | } | |
1163 | len += user_args->a[i].len; | |
1164 | line = p + 5; | |
1165 | } | |
1166 | ||
1167 | /* Don't forget the tail. */ | |
1168 | len += strlen (line); | |
1169 | ||
1170 | /* Allocate space for the new line and fill it in. */ | |
1171 | new_line = (char *)xmalloc (len + 1); | |
1172 | if (new_line == NULL) | |
1173 | return NULL; | |
1174 | ||
1175 | /* Restore pointer to beginning of old line. */ | |
1176 | line = save_line; | |
1177 | ||
1178 | /* Save pointer to beginning of new line. */ | |
1179 | save_line = new_line; | |
1180 | ||
1181 | while ((p = locate_arg (line))) | |
1182 | { | |
1183 | int i, len; | |
1184 | ||
1185 | memcpy (new_line, line, p - line); | |
1186 | new_line += p - line; | |
1187 | i = p[4] - '0'; | |
1188 | ||
1189 | len = user_args->a[i].len; | |
1190 | if (len) | |
1191 | { | |
1192 | memcpy (new_line, user_args->a[i].arg, len); | |
1193 | new_line += len; | |
1194 | } | |
1195 | line = p + 5; | |
1196 | } | |
1197 | /* Don't forget the tail. */ | |
1198 | strcpy (new_line, line); | |
1199 | ||
1200 | /* Return a pointer to the beginning of the new line. */ | |
1201 | return save_line; | |
1202 | } | |
1203 | ||
1204 | void | |
1205 | execute_user_command (c, args) | |
1206 | struct cmd_list_element *c; | |
1207 | char *args; | |
1208 | { | |
1209 | register struct command_line *cmdlines; | |
1210 | struct cleanup *old_chain; | |
1211 | enum command_control_type ret; | |
1212 | ||
1213 | old_chain = setup_user_args (args); | |
1214 | ||
1215 | cmdlines = c->user_commands; | |
1216 | if (cmdlines == 0) | |
1217 | /* Null command */ | |
1218 | return; | |
1219 | ||
1220 | /* Set the instream to 0, indicating execution of a | |
1221 | user-defined function. */ | |
1222 | old_chain = make_cleanup ((make_cleanup_func) source_cleanup, instream); | |
1223 | instream = (FILE *) 0; | |
1224 | while (cmdlines) | |
1225 | { | |
1226 | ret = execute_control_command (cmdlines); | |
1227 | if (ret != simple_control && ret != break_control) | |
1228 | { | |
1229 | warning ("Error in control structure.\n"); | |
1230 | break; | |
1231 | } | |
1232 | cmdlines = cmdlines->next; | |
1233 | } | |
1234 | do_cleanups (old_chain); | |
1235 | } | |
1236 | ||
1237 | /* Execute the line P as a command. | |
1238 | Pass FROM_TTY as second argument to the defining function. */ | |
1239 | ||
1240 | void | |
1241 | execute_command (p, from_tty) | |
1242 | char *p; | |
1243 | int from_tty; | |
1244 | { | |
1245 | register struct cmd_list_element *c; | |
1246 | register enum language flang; | |
1247 | static int warned = 0; | |
1248 | /* FIXME: These should really be in an appropriate header file */ | |
1249 | extern void serial_log_command PARAMS ((const char *)); | |
1250 | ||
1251 | free_all_values (); | |
1252 | ||
1253 | /* Force cleanup of any alloca areas if using C alloca instead of | |
1254 | a builtin alloca. */ | |
1255 | alloca (0); | |
1256 | ||
1257 | /* This can happen when command_line_input hits end of file. */ | |
1258 | if (p == NULL) | |
1259 | return; | |
1260 | ||
1261 | serial_log_command (p); | |
1262 | ||
1263 | while (*p == ' ' || *p == '\t') p++; | |
1264 | if (*p) | |
1265 | { | |
1266 | char *arg; | |
1267 | ||
1268 | c = lookup_cmd (&p, cmdlist, "", 0, 1); | |
1269 | /* Pass null arg rather than an empty one. */ | |
1270 | arg = *p ? p : 0; | |
1271 | ||
1272 | /* Clear off trailing whitespace, except for set and complete command. */ | |
1273 | if (arg && c->type != set_cmd && c->function.cfunc != complete_command) | |
1274 | { | |
1275 | p = arg + strlen (arg) - 1; | |
1276 | while (p >= arg && (*p == ' ' || *p == '\t')) | |
1277 | p--; | |
1278 | *(p + 1) = '\0'; | |
1279 | } | |
1280 | ||
1281 | /* If this command has been hooked, run the hook first. */ | |
1282 | if (c->hook) | |
1283 | execute_user_command (c->hook, (char *)0); | |
1284 | ||
1285 | if (c->class == class_user) | |
1286 | execute_user_command (c, arg); | |
1287 | else if (c->type == set_cmd || c->type == show_cmd) | |
1288 | do_setshow_command (arg, from_tty & caution, c); | |
1289 | else if (c->function.cfunc == NO_FUNCTION) | |
1290 | error ("That is not a command, just a help topic."); | |
1291 | else if (call_command_hook) | |
1292 | call_command_hook (c, arg, from_tty & caution); | |
1293 | else | |
1294 | (*c->function.cfunc) (arg, from_tty & caution); | |
1295 | } | |
1296 | ||
1297 | /* Tell the user if the language has changed (except first time). */ | |
1298 | if (current_language != expected_language) | |
1299 | { | |
1300 | if (language_mode == language_mode_auto) { | |
1301 | language_info (1); /* Print what changed. */ | |
1302 | } | |
1303 | warned = 0; | |
1304 | } | |
1305 | ||
1306 | /* Warn the user if the working language does not match the | |
1307 | language of the current frame. Only warn the user if we are | |
1308 | actually running the program, i.e. there is a stack. */ | |
1309 | /* FIXME: This should be cacheing the frame and only running when | |
1310 | the frame changes. */ | |
1311 | ||
1312 | if (target_has_stack) | |
1313 | { | |
1314 | flang = get_frame_language (); | |
1315 | if (!warned | |
1316 | && flang != language_unknown | |
1317 | && flang != current_language->la_language) | |
1318 | { | |
1319 | printf_filtered ("%s\n", lang_frame_mismatch_warn); | |
1320 | warned = 1; | |
1321 | } | |
1322 | } | |
1323 | } | |
1324 | ||
1325 | /* ARGSUSED */ | |
392a587b | 1326 | /* NOTE 1999-04-29: This function will be static again, once we modify |
cd0fc7c3 SS |
1327 | gdb to use the event loop as the default command loop and we merge |
1328 | event-top.c into this file, top.c */ | |
1329 | /* static */ void | |
c906108c SS |
1330 | command_loop_marker (foo) |
1331 | int foo; | |
1332 | { | |
1333 | } | |
1334 | ||
1335 | /* Read commands from `instream' and execute them | |
1336 | until end of file or error reading instream. */ | |
1337 | ||
1338 | void | |
1339 | command_loop () | |
1340 | { | |
1341 | struct cleanup *old_chain; | |
1342 | char *command; | |
1343 | int stdin_is_tty = ISATTY (stdin); | |
1344 | long time_at_cmd_start; | |
1345 | #ifdef HAVE_SBRK | |
1346 | long space_at_cmd_start = 0; | |
1347 | #endif | |
1348 | extern int display_time; | |
1349 | extern int display_space; | |
1350 | ||
1351 | while (instream && !feof (instream)) | |
1352 | { | |
1353 | #if defined(TUI) | |
1354 | extern int insert_mode; | |
1355 | #endif | |
1356 | if (window_hook && instream == stdin) | |
0f71a2f6 | 1357 | (*window_hook) (instream, get_prompt ()); |
c906108c SS |
1358 | |
1359 | quit_flag = 0; | |
1360 | if (instream == stdin && stdin_is_tty) | |
1361 | reinitialize_more_filter (); | |
1362 | old_chain = make_cleanup ((make_cleanup_func) command_loop_marker, 0); | |
1363 | ||
1364 | #if defined(TUI) | |
1365 | /* A bit of paranoia: I want to make sure the "insert_mode" global | |
1366 | * is clear except when it is being used for command-line editing | |
1367 | * (see tuiIO.c, utils.c); otherwise normal output will | |
1368 | * get messed up in the TUI. So clear it before/after | |
1369 | * the command-line-input call. - RT | |
1370 | */ | |
1371 | insert_mode = 0; | |
1372 | #endif | |
1373 | /* Get a command-line. This calls the readline package. */ | |
0f71a2f6 JM |
1374 | command = command_line_input (instream == stdin ? |
1375 | get_prompt () : (char *) NULL, | |
c906108c SS |
1376 | instream == stdin, "prompt"); |
1377 | #if defined(TUI) | |
1378 | insert_mode = 0; | |
1379 | #endif | |
1380 | if (command == 0) | |
1381 | return; | |
1382 | ||
1383 | time_at_cmd_start = get_run_time (); | |
1384 | ||
1385 | if (display_space) | |
1386 | { | |
1387 | #ifdef HAVE_SBRK | |
1388 | extern char **environ; | |
1389 | char *lim = (char *) sbrk (0); | |
1390 | ||
1391 | space_at_cmd_start = (long) (lim - (char *) &environ); | |
1392 | #endif | |
1393 | } | |
1394 | ||
1395 | execute_command (command, instream == stdin); | |
1396 | /* Do any commands attached to breakpoint we stopped at. */ | |
1397 | bpstat_do_actions (&stop_bpstat); | |
1398 | do_cleanups (old_chain); | |
1399 | ||
1400 | if (display_time) | |
1401 | { | |
1402 | long cmd_time = get_run_time () - time_at_cmd_start; | |
1403 | ||
1404 | printf_unfiltered ("Command execution time: %ld.%06ld\n", | |
1405 | cmd_time / 1000000, cmd_time % 1000000); | |
1406 | } | |
1407 | ||
1408 | if (display_space) | |
1409 | { | |
1410 | #ifdef HAVE_SBRK | |
1411 | extern char **environ; | |
1412 | char *lim = (char *) sbrk (0); | |
1413 | long space_now = lim - (char *) &environ; | |
1414 | long space_diff = space_now - space_at_cmd_start; | |
1415 | ||
1416 | printf_unfiltered ("Space used: %ld (%c%ld for this command)\n", | |
1417 | space_now, | |
1418 | (space_diff >= 0 ? '+' : '-'), | |
1419 | space_diff); | |
1420 | #endif | |
1421 | } | |
1422 | } | |
1423 | } | |
392a587b | 1424 |