import gdb-1999-09-08 snapshot
[deliverable/binutils-gdb.git] / gdb / main.c
1 /* Top level stuff for GDB, the GNU debugger.
2 Copyright 1986, 87, 88, 89, 90, 91, 92, 93, 94, 95, 1999
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,
20 Boston, MA 02111-1307, USA. */
21
22 #include "defs.h"
23 #include "top.h"
24 #include "target.h"
25 #include "inferior.h"
26 #include "call-cmds.h"
27
28 #include "getopt.h"
29
30 #include <sys/types.h>
31 #include "gdb_stat.h"
32 #include <ctype.h>
33
34 #include "gdb_string.h"
35 #include "event-loop.h"
36
37 /* If nonzero, display time usage both at startup and for each command. */
38
39 int display_time;
40
41 /* If nonzero, display space usage both at startup and for each command. */
42
43 int display_space;
44
45 /* Whether this is the async version or not. The async version is
46 invoked on the command line with the -nw --async options. In this
47 version, the usual command_loop is substituted by and event loop which
48 processes UI events asynchronously. */
49 int async_p = 1;
50
51 /* Whether this is the command line version or not */
52 int tui_version = 0;
53
54 /* Whether xdb commands will be handled */
55 int xdb_commands = 0;
56
57 /* Whether dbx commands will be handled */
58 int dbx_commands = 0;
59
60 GDB_FILE *gdb_stdout;
61 GDB_FILE *gdb_stderr;
62 GDB_FILE *gdb_stdlog;
63 GDB_FILE *gdb_stdtarg;
64
65 /* Whether to enable writing into executable and core files */
66 extern int write_files;
67
68 static void print_gdb_help PARAMS ((GDB_FILE *));
69
70 /* These two are used to set the external editor commands when gdb is farming
71 out files to be edited by another program. */
72
73 extern int enable_external_editor;
74 extern char *external_editor_command;
75
76 #ifdef __CYGWIN__
77 #include <windows.h> /* for MAX_PATH */
78 #include <sys/cygwin.h> /* for cygwin32_conv_to_posix_path */
79 #endif
80
81 int
82 main (argc, argv)
83 int argc;
84 char **argv;
85 {
86 int count;
87 static int quiet = 0;
88 static int batch = 0;
89
90 /* Pointers to various arguments from command line. */
91 char *symarg = NULL;
92 char *execarg = NULL;
93 char *corearg = NULL;
94 char *cdarg = NULL;
95 char *ttyarg = NULL;
96
97 /* These are static so that we can take their address in an initializer. */
98 static int print_help;
99 static int print_version;
100
101 /* Pointers to all arguments of --command option. */
102 char **cmdarg;
103 /* Allocated size of cmdarg. */
104 int cmdsize;
105 /* Number of elements of cmdarg used. */
106 int ncmd;
107
108 /* Indices of all arguments of --directory option. */
109 char **dirarg;
110 /* Allocated size. */
111 int dirsize;
112 /* Number of elements used. */
113 int ndir;
114
115 struct stat homebuf, cwdbuf;
116 char *homedir, *homeinit;
117
118 register int i;
119
120 long time_at_startup = get_run_time ();
121
122 START_PROGRESS (argv[0], 0);
123
124 #ifdef MPW
125 /* Do all Mac-specific setup. */
126 mac_init ();
127 #endif /* MPW */
128
129 /* This needs to happen before the first use of malloc. */
130 init_malloc ((PTR) NULL);
131
132 #if defined (ALIGN_STACK_ON_STARTUP)
133 i = (int) &count & 0x3;
134 if (i != 0)
135 alloca (4 - i);
136 #endif
137
138 /* If error() is called from initialization code, just exit */
139 if (SET_TOP_LEVEL ())
140 {
141 exit (1);
142 }
143
144 cmdsize = 1;
145 cmdarg = (char **) xmalloc (cmdsize * sizeof (*cmdarg));
146 ncmd = 0;
147 dirsize = 1;
148 dirarg = (char **) xmalloc (dirsize * sizeof (*dirarg));
149 ndir = 0;
150
151 quit_flag = 0;
152 line = (char *) xmalloc (linesize);
153 line[0] = '\0'; /* Terminate saved (now empty) cmd line */
154 instream = stdin;
155
156 getcwd (gdb_dirbuf, sizeof (gdb_dirbuf));
157 current_directory = gdb_dirbuf;
158
159 #if 0
160 /* not yet */
161 gdb_stdout = stdio_fileopen (stdout);
162 gdb_stderr = stdio_fileopen (stderr);
163 gdb_stdlog = gdb_stderr; /* for moment */
164 gdb_stdtarg = gdb_stderr; /* for moment */
165 #else
166 gdb_stdout = tui_fileopen (stdout);
167 gdb_stderr = tui_fileopen (stderr);
168 gdb_stdlog = gdb_stdout; /* for moment */
169 gdb_stdtarg = gdb_stderr; /* for moment */
170 #endif
171
172 /* Parse arguments and options. */
173 {
174 int c;
175 /* When var field is 0, use flag field to record the equivalent
176 short option (or arbitrary numbers starting at 10 for those
177 with no equivalent). */
178 static struct option long_options[] =
179 {
180 {"async", no_argument, &async_p, 1},
181 {"noasync", no_argument, &async_p, 0},
182 #if defined(TUI)
183 {"tui", no_argument, &tui_version, 1},
184 #endif
185 {"xdb", no_argument, &xdb_commands, 1},
186 {"dbx", no_argument, &dbx_commands, 1},
187 {"readnow", no_argument, &readnow_symbol_files, 1},
188 {"r", no_argument, &readnow_symbol_files, 1},
189 {"mapped", no_argument, &mapped_symbol_files, 1},
190 {"m", no_argument, &mapped_symbol_files, 1},
191 {"quiet", no_argument, &quiet, 1},
192 {"q", no_argument, &quiet, 1},
193 {"silent", no_argument, &quiet, 1},
194 {"nx", no_argument, &inhibit_gdbinit, 1},
195 {"n", no_argument, &inhibit_gdbinit, 1},
196 {"batch", no_argument, &batch, 1},
197 {"epoch", no_argument, &epoch_interface, 1},
198
199 /* This is a synonym for "--annotate=1". --annotate is now preferred,
200 but keep this here for a long time because people will be running
201 emacses which use --fullname. */
202 {"fullname", no_argument, 0, 'f'},
203 {"f", no_argument, 0, 'f'},
204
205 {"annotate", required_argument, 0, 12},
206 {"help", no_argument, &print_help, 1},
207 {"se", required_argument, 0, 10},
208 {"symbols", required_argument, 0, 's'},
209 {"s", required_argument, 0, 's'},
210 {"exec", required_argument, 0, 'e'},
211 {"e", required_argument, 0, 'e'},
212 {"core", required_argument, 0, 'c'},
213 {"c", required_argument, 0, 'c'},
214 {"command", required_argument, 0, 'x'},
215 {"version", no_argument, &print_version, 1},
216 {"x", required_argument, 0, 'x'},
217 {"directory", required_argument, 0, 'd'},
218 {"cd", required_argument, 0, 11},
219 {"tty", required_argument, 0, 't'},
220 {"baud", required_argument, 0, 'b'},
221 {"b", required_argument, 0, 'b'},
222 {"nw", no_argument, &use_windows, 0},
223 {"nowindows", no_argument, &use_windows, 0},
224 {"w", no_argument, &use_windows, 1},
225 {"windows", no_argument, &use_windows, 1},
226 {"statistics", no_argument, 0, 13},
227 {"write", no_argument, &write_files, 1},
228 /* Allow machine descriptions to add more options... */
229 #ifdef ADDITIONAL_OPTIONS
230 ADDITIONAL_OPTIONS
231 #endif
232 {0, no_argument, 0, 0}
233 };
234
235 while (1)
236 {
237 int option_index;
238
239 c = getopt_long_only (argc, argv, "",
240 long_options, &option_index);
241 if (c == EOF)
242 break;
243
244 /* Long option that takes an argument. */
245 if (c == 0 && long_options[option_index].flag == 0)
246 c = long_options[option_index].val;
247
248 switch (c)
249 {
250 case 0:
251 /* Long option that just sets a flag. */
252 break;
253 case 10:
254 symarg = optarg;
255 execarg = optarg;
256 break;
257 case 11:
258 cdarg = optarg;
259 break;
260 case 12:
261 /* FIXME: what if the syntax is wrong (e.g. not digits)? */
262 annotation_level = atoi (optarg);
263 break;
264 case 13:
265 /* Enable the display of both time and space usage. */
266 display_time = 1;
267 display_space = 1;
268 break;
269 case 'f':
270 annotation_level = 1;
271 /* We have probably been invoked from emacs. Disable window interface. */
272 use_windows = 0;
273 break;
274 case 's':
275 symarg = optarg;
276 break;
277 case 'e':
278 execarg = optarg;
279 break;
280 case 'c':
281 corearg = optarg;
282 break;
283 case 'x':
284 cmdarg[ncmd++] = optarg;
285 if (ncmd >= cmdsize)
286 {
287 cmdsize *= 2;
288 cmdarg = (char **) xrealloc ((char *) cmdarg,
289 cmdsize * sizeof (*cmdarg));
290 }
291 break;
292 case 'd':
293 dirarg[ndir++] = optarg;
294 if (ndir >= dirsize)
295 {
296 dirsize *= 2;
297 dirarg = (char **) xrealloc ((char *) dirarg,
298 dirsize * sizeof (*dirarg));
299 }
300 break;
301 case 't':
302 ttyarg = optarg;
303 break;
304 case 'q':
305 quiet = 1;
306 break;
307 case 'b':
308 {
309 int i;
310 char *p;
311
312 i = strtol (optarg, &p, 0);
313 if (i == 0 && p == optarg)
314
315 /* Don't use *_filtered or warning() (which relies on
316 current_target) until after initialize_all_files(). */
317
318 fprintf_unfiltered
319 (gdb_stderr,
320 "warning: could not set baud rate to `%s'.\n", optarg);
321 else
322 baud_rate = i;
323 }
324 case 'l':
325 {
326 int i;
327 char *p;
328
329 i = strtol (optarg, &p, 0);
330 if (i == 0 && p == optarg)
331
332 /* Don't use *_filtered or warning() (which relies on
333 current_target) until after initialize_all_files(). */
334
335 fprintf_unfiltered
336 (gdb_stderr,
337 "warning: could not set timeout limit to `%s'.\n", optarg);
338 else
339 remote_timeout = i;
340 }
341 break;
342
343 #ifdef ADDITIONAL_OPTION_CASES
344 ADDITIONAL_OPTION_CASES
345 #endif
346 case '?':
347 fprintf_unfiltered (gdb_stderr,
348 "Use `%s --help' for a complete list of options.\n",
349 argv[0]);
350 exit (1);
351 }
352 }
353
354 /* If --help or --version, disable window interface. */
355 if (print_help || print_version)
356 {
357 use_windows = 0;
358 #ifdef TUI
359 /* Disable the TUI as well. */
360 tui_version = 0;
361 #endif
362 }
363
364 #ifdef TUI
365 /* An explicit --tui flag overrides the default UI, which is the
366 window system. */
367 if (tui_version)
368 use_windows = 0;
369 #endif
370
371 /* OK, that's all the options. The other arguments are filenames. */
372 count = 0;
373 for (; optind < argc; optind++)
374 switch (++count)
375 {
376 case 1:
377 symarg = argv[optind];
378 execarg = argv[optind];
379 break;
380 case 2:
381 corearg = argv[optind];
382 break;
383 case 3:
384 fprintf_unfiltered (gdb_stderr,
385 "Excess command line arguments ignored. (%s%s)\n",
386 argv[optind], (optind == argc - 1) ? "" : " ...");
387 break;
388 }
389 if (batch)
390 quiet = 1;
391 }
392
393 #if defined(TUI)
394 /* Should this be moved to tui-top.c:_initialize_tui()? */
395 if (tui_version)
396 init_ui_hook = tuiInit;
397 #endif
398
399 /* Initialize all files. Give the interpreter a chance to take
400 control of the console via the init_ui_hook()) */
401 gdb_init (argv[0]);
402
403 /* Do these (and anything which might call wrap_here or *_filtered)
404 after initialize_all_files. */
405 if (print_version)
406 {
407 print_gdb_version (gdb_stdout);
408 wrap_here ("");
409 printf_filtered ("\n");
410 exit (0);
411 }
412
413 if (print_help)
414 {
415 print_gdb_help (gdb_stdout);
416 fputs_unfiltered ("\n", gdb_stdout);
417 exit (0);
418 }
419
420 if (!quiet)
421 {
422 /* Print all the junk at the top, with trailing "..." if we are about
423 to read a symbol file (possibly slowly). */
424 print_gdb_version (gdb_stdout);
425 if (symarg)
426 printf_filtered ("..");
427 wrap_here ("");
428 gdb_flush (gdb_stdout); /* Force to screen during slow operations */
429 }
430
431 error_pre_print = "\n\n";
432 quit_pre_print = error_pre_print;
433
434 /* We may get more than one warning, don't double space all of them... */
435 warning_pre_print = "\nwarning: ";
436
437 /* Read and execute $HOME/.gdbinit file, if it exists. This is done
438 *before* all the command line arguments are processed; it sets
439 global parameters, which are independent of what file you are
440 debugging or what directory you are in. */
441 #ifdef __CYGWIN32__
442 {
443 char *tmp = getenv ("HOME");
444
445 if (tmp != NULL)
446 {
447 homedir = (char *) alloca (MAX_PATH + 1);
448 cygwin32_conv_to_posix_path (tmp, homedir);
449 }
450 else
451 homedir = NULL;
452 }
453 #else
454 homedir = getenv ("HOME");
455 #endif
456 if (homedir)
457 {
458 homeinit = (char *) alloca (strlen (homedir) +
459 strlen (gdbinit) + 10);
460 strcpy (homeinit, homedir);
461 strcat (homeinit, "/");
462 strcat (homeinit, gdbinit);
463
464 if (!inhibit_gdbinit)
465 {
466 if (!SET_TOP_LEVEL ())
467 source_command (homeinit, 0);
468 }
469 do_cleanups (ALL_CLEANUPS);
470
471 /* Do stats; no need to do them elsewhere since we'll only
472 need them if homedir is set. Make sure that they are
473 zero in case one of them fails (this guarantees that they
474 won't match if either exists). */
475
476 memset (&homebuf, 0, sizeof (struct stat));
477 memset (&cwdbuf, 0, sizeof (struct stat));
478
479 stat (homeinit, &homebuf);
480 stat (gdbinit, &cwdbuf); /* We'll only need this if
481 homedir was set. */
482 }
483
484 /* Now perform all the actions indicated by the arguments. */
485 if (cdarg != NULL)
486 {
487 if (!SET_TOP_LEVEL ())
488 {
489 cd_command (cdarg, 0);
490 }
491 }
492 do_cleanups (ALL_CLEANUPS);
493
494 for (i = 0; i < ndir; i++)
495 if (!SET_TOP_LEVEL ())
496 directory_command (dirarg[i], 0);
497 free ((PTR) dirarg);
498 do_cleanups (ALL_CLEANUPS);
499
500 if (execarg != NULL
501 && symarg != NULL
502 && STREQ (execarg, symarg))
503 {
504 /* The exec file and the symbol-file are the same. If we can't open
505 it, better only print one error message. */
506 if (!SET_TOP_LEVEL ())
507 {
508 exec_file_command (execarg, !batch);
509 symbol_file_command (symarg, 0);
510 }
511 }
512 else
513 {
514 if (execarg != NULL)
515 if (!SET_TOP_LEVEL ())
516 exec_file_command (execarg, !batch);
517 if (symarg != NULL)
518 if (!SET_TOP_LEVEL ())
519 symbol_file_command (symarg, 0);
520 }
521 do_cleanups (ALL_CLEANUPS);
522
523 /* After the symbol file has been read, print a newline to get us
524 beyond the copyright line... But errors should still set off
525 the error message with a (single) blank line. */
526 if (!quiet)
527 printf_filtered ("\n");
528 error_pre_print = "\n";
529 quit_pre_print = error_pre_print;
530 warning_pre_print = "\nwarning: ";
531
532 if (corearg != NULL)
533 {
534 if (!SET_TOP_LEVEL ())
535 core_file_command (corearg, !batch);
536 else if (isdigit (corearg[0]) && !SET_TOP_LEVEL ())
537 attach_command (corearg, !batch);
538 }
539 do_cleanups (ALL_CLEANUPS);
540
541 if (ttyarg != NULL)
542 if (!SET_TOP_LEVEL ())
543 tty_command (ttyarg, !batch);
544 do_cleanups (ALL_CLEANUPS);
545
546 #ifdef ADDITIONAL_OPTION_HANDLER
547 ADDITIONAL_OPTION_HANDLER;
548 #endif
549
550 /* Error messages should no longer be distinguished with extra output. */
551 error_pre_print = NULL;
552 quit_pre_print = NULL;
553 warning_pre_print = "warning: ";
554
555 /* Read the .gdbinit file in the current directory, *if* it isn't
556 the same as the $HOME/.gdbinit file (it should exist, also). */
557
558 if (!homedir
559 || memcmp ((char *) &homebuf, (char *) &cwdbuf, sizeof (struct stat)))
560 if (!inhibit_gdbinit)
561 {
562 if (!SET_TOP_LEVEL ())
563 source_command (gdbinit, 0);
564 }
565 do_cleanups (ALL_CLEANUPS);
566
567 for (i = 0; i < ncmd; i++)
568 {
569 if (!SET_TOP_LEVEL ())
570 {
571 /* NOTE: I am commenting this out, because it is not clear
572 where this feature is used. It is very old and
573 undocumented. ezannoni: 1999-05-04 */
574 #if 0
575 if (cmdarg[i][0] == '-' && cmdarg[i][1] == '\0')
576 read_command_file (stdin);
577 else
578 #endif
579 source_command (cmdarg[i], !batch);
580 do_cleanups (ALL_CLEANUPS);
581 }
582 }
583 free ((PTR) cmdarg);
584
585 /* Read in the old history after all the command files have been read. */
586 init_history ();
587
588 if (batch)
589 {
590 /* We have hit the end of the batch file. */
591 exit (0);
592 }
593
594 /* Do any host- or target-specific hacks. This is used for i960 targets
595 to force the user to set a nindy target and spec its parameters. */
596
597 #ifdef BEFORE_MAIN_LOOP_HOOK
598 BEFORE_MAIN_LOOP_HOOK;
599 #endif
600
601 END_PROGRESS (argv[0]);
602
603 /* Show time and/or space usage. */
604
605 if (display_time)
606 {
607 long init_time = get_run_time () - time_at_startup;
608
609 printf_unfiltered ("Startup time: %ld.%06ld\n",
610 init_time / 1000000, init_time % 1000000);
611 }
612
613 if (display_space)
614 {
615 #ifdef HAVE_SBRK
616 extern char **environ;
617 char *lim = (char *) sbrk (0);
618
619 printf_unfiltered ("Startup size: data size %ld\n",
620 (long) (lim - (char *) &environ));
621 #endif
622 }
623
624 /* The default command loop.
625 The WIN32 Gui calls this main to set up gdb's state, and
626 has its own command loop. */
627 #if !defined _WIN32 || defined __GNUC__
628 while (1)
629 {
630 if (!SET_TOP_LEVEL ())
631 {
632 do_cleanups (ALL_CLEANUPS); /* Do complete cleanup */
633 /* GUIs generally have their own command loop, mainloop, or whatever.
634 This is a good place to gain control because many error
635 conditions will end up here via longjmp(). */
636 if (command_loop_hook)
637 command_loop_hook ();
638 else
639 command_loop ();
640 quit_command ((char *) 0, instream == stdin);
641 }
642 }
643 /* No exit -- exit is through quit_command. */
644 #endif
645
646 }
647
648 /* Don't use *_filtered for printing help. We don't want to prompt
649 for continue no matter how small the screen or how much we're going
650 to print. */
651
652 static void
653 print_gdb_help (stream)
654 GDB_FILE *stream;
655 {
656 fputs_unfiltered ("\
657 This is the GNU debugger. Usage:\n\n\
658 gdb [options] [executable-file [core-file or process-id]]\n\n\
659 Options:\n\n\
660 ", stream);
661 fputs_unfiltered ("\
662 --[no]async Enable (disable) asynchronous version of CLI\n\
663 ", stream);
664 fputs_unfiltered ("\
665 -b BAUDRATE Set serial port baud rate used for remote debugging.\n\
666 --batch Exit after processing options.\n\
667 --cd=DIR Change current directory to DIR.\n\
668 --command=FILE Execute GDB commands from FILE.\n\
669 --core=COREFILE Analyze the core dump COREFILE.\n\
670 ", stream);
671 fputs_unfiltered ("\
672 --dbx DBX compatibility mode.\n\
673 --directory=DIR Search for source files in DIR.\n\
674 --epoch Output information used by epoch emacs-GDB interface.\n\
675 --exec=EXECFILE Use EXECFILE as the executable.\n\
676 --fullname Output information used by emacs-GDB interface.\n\
677 --help Print this message.\n\
678 ", stream);
679 fputs_unfiltered ("\
680 --mapped Use mapped symbol files if supported on this system.\n\
681 --nw Do not use a window interface.\n\
682 --nx Do not read ", stream);
683 fputs_unfiltered (gdbinit, stream);
684 fputs_unfiltered (" file.\n\
685 --quiet Do not print version number on startup.\n\
686 --readnow Fully read symbol files on first access.\n\
687 ", stream);
688 fputs_unfiltered ("\
689 --se=FILE Use FILE as symbol file and executable file.\n\
690 --symbols=SYMFILE Read symbols from SYMFILE.\n\
691 --tty=TTY Use TTY for input/output by the program being debugged.\n\
692 ", stream);
693 #if defined(TUI)
694 fputs_unfiltered ("\
695 --tui Use a terminal user interface.\n\
696 ", stream);
697 #endif
698 fputs_unfiltered ("\
699 --version Print version information and then exit.\n\
700 -w Use a window interface.\n\
701 --write Set writing into executable and core files.\n\
702 --xdb XDB compatibility mode.\n\
703 ", stream);
704 #ifdef ADDITIONAL_OPTION_HELP
705 fputs_unfiltered (ADDITIONAL_OPTION_HELP, stream);
706 #endif
707 fputs_unfiltered ("\n\
708 For more information, type \"help\" from within GDB, or consult the\n\
709 GDB manual (available as on-line info or a printed manual).\n\
710 Report bugs to \"bug-gdb@prep.ai.mit.edu\".\
711 ", stream);
712 }
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