1 /* Top level `main' program for GDB, the GNU debugger.
2 Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992 Free Software Foundation, Inc.
4 This file is part of GDB.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
26 #include "breakpoint.h"
28 #include "expression.h"
33 /* readline include files */
37 /* readline defines this. */
41 #include <sys/types.h>
50 #include <sys/param.h>
54 #ifdef SET_STACK_LIMIT_HUGE
56 #include <sys/resource.h>
58 int original_stack_limit
;
61 /* Prototypes for local functions */
64 symbol_completion_function
PARAMS ((char *, int));
67 command_loop
PARAMS ((void));
70 command_loop_marker
PARAMS ((int));
73 print_gdb_version
PARAMS ((void));
76 quit_command
PARAMS ((char *, int));
79 initialize_main
PARAMS ((void));
82 initialize_history
PARAMS ((void));
85 initialize_cmd_lists
PARAMS ((void));
88 float_handler
PARAMS ((int));
91 source_command
PARAMS ((char *, int));
94 cd_command
PARAMS ((char *, int));
97 print_gnu_advertisement
PARAMS ((void));
100 init_signals
PARAMS ((void));
103 read_command_file
PARAMS ((FILE *));
106 set_verbose
PARAMS ((char *, int, struct cmd_list_element
*));
109 show_history
PARAMS ((char *, int));
112 set_history
PARAMS ((char *, int));
115 set_history_size_command
PARAMS ((char *, int, struct cmd_list_element
*));
118 show_commands
PARAMS ((char *, int));
121 dump_me_command
PARAMS ((char *, int));
124 echo_command
PARAMS ((char *, int));
127 pwd_command
PARAMS ((char *, int));
130 show_version
PARAMS ((char *, int));
133 document_command
PARAMS ((char *, int));
136 define_command
PARAMS ((char *, int));
139 validate_comname
PARAMS ((char *));
142 help_command
PARAMS ((char *, int));
145 show_command
PARAMS ((char *, int));
148 info_command
PARAMS ((char *, int));
151 do_nothing
PARAMS ((int));
154 disconnect
PARAMS ((int));
157 source_cleanup
PARAMS ((FILE *));
159 /* If this definition isn't overridden by the header files, assume
160 that isatty and fileno exist on this system. */
162 #define ISATTY(FP) (isatty (fileno (FP)))
165 /* Initialization file name for gdb. This is overridden in some configs. */
167 #ifndef GDBINIT_FILENAME
168 #define GDBINIT_FILENAME ".gdbinit"
170 char gdbinit
[] = GDBINIT_FILENAME
;
172 #define ALL_CLEANUPS ((struct cleanup *)0)
174 /* Version number of GDB, as a string. */
176 extern char *version
;
178 /* Message to be printed before the error message, when an error occurs. */
180 extern char *error_pre_print
;
182 /* Message to be printed before the warning message, when a warning occurs. */
184 extern char *warning_pre_print
;
186 extern char lang_frame_mismatch_warn
[]; /* language.c */
188 /* Whether GDB's stdin is on a terminal. */
190 extern int gdb_has_a_terminal
; /* inflow.c */
192 /* Flag for whether we want all the "from_tty" gubbish printed. */
194 int caution
= 1; /* Default is yes, sigh. */
197 * Define all cmd_list_element's
200 /* Chain containing all defined commands. */
202 struct cmd_list_element
*cmdlist
;
204 /* Chain containing all defined info subcommands. */
206 struct cmd_list_element
*infolist
;
208 /* Chain containing all defined enable subcommands. */
210 struct cmd_list_element
*enablelist
;
212 /* Chain containing all defined disable subcommands. */
214 struct cmd_list_element
*disablelist
;
216 /* Chain containing all defined delete subcommands. */
218 struct cmd_list_element
*deletelist
;
220 /* Chain containing all defined "enable breakpoint" subcommands. */
222 struct cmd_list_element
*enablebreaklist
;
224 /* Chain containing all defined set subcommands */
226 struct cmd_list_element
*setlist
;
228 /* Chain containing all defined show subcommands. */
229 struct cmd_list_element
*showlist
;
231 /* Chain containing all defined \"set history\". */
233 struct cmd_list_element
*sethistlist
;
235 /* Chain containing all defined \"show history\". */
236 struct cmd_list_element
*showhistlist
;
238 /* Chain containing all defined \"unset history\". */
240 struct cmd_list_element
*unsethistlist
;
242 /* stdio stream that command input is being read from. */
246 /* Current working directory. */
248 char *current_directory
;
250 /* The directory name is actually stored here (usually). */
251 static char dirbuf
[1024];
253 /* Function to call before reading a command, if nonzero.
254 The function receives two args: an input stream,
255 and a prompt string. */
257 void (*window_hook
) PARAMS ((FILE *, char *));
259 extern int frame_file_full_name
;
260 extern int mapped_symbol_files
;
261 extern int readnow_symbol_files
;
266 /* gdb prints this when reading a command interactively */
269 /* Buffer used for reading command lines, and the size
270 allocated for it so far. */
275 /* Baud rate specified for talking to serial target systems. Default
276 is left as a zero pointer, so targets can choose their own defaults. */
280 /* Signal to catch ^Z typed while reading a command: SIGTSTP or SIGCONT. */
284 #define STOP_SIGNAL SIGTSTP
285 static void stop_sig
PARAMS ((int));
289 /* Some System V have job control but not sigsetmask(). */
290 #if !defined (HAVE_SIGSETMASK)
291 #define HAVE_SIGSETMASK !defined (USG)
294 #if 0 == (HAVE_SIGSETMASK)
295 #define sigsetmask(n)
298 /* This is how `error' returns to command level. */
300 jmp_buf to_top_level
;
303 return_to_top_level ()
307 bpstat_clear_actions(stop_bpstat
); /* Clear queued breakpoint commands */
308 disable_current_display ();
309 do_cleanups (ALL_CLEANUPS
);
310 (NORETURN
void) longjmp (to_top_level
, 1);
313 /* Call FUNC with arg ARGS, catching any errors.
314 If there is no error, return the value returned by FUNC.
315 If there is an error, print ERRSTRING, print the specific error message,
319 catch_errors (func
, args
, errstring
)
320 int (*func
) PARAMS ((char *));
326 struct cleanup
*saved_cleanup_chain
;
327 char *saved_error_pre_print
;
329 saved_cleanup_chain
= save_cleanups ();
330 saved_error_pre_print
= error_pre_print
;
332 memcpy ((char *)saved
, (char *)to_top_level
, sizeof (jmp_buf));
333 error_pre_print
= errstring
;
335 if (setjmp (to_top_level
) == 0)
336 val
= (*func
) (args
);
340 restore_cleanups (saved_cleanup_chain
);
342 error_pre_print
= saved_error_pre_print
;
343 memcpy ((char *)to_top_level
, (char *)saved
, sizeof (jmp_buf));
347 /* Handler for SIGHUP. */
353 kill_inferior_fast ();
354 signal (signo
, SIG_DFL
);
355 kill (getpid (), SIGHUP
);
358 /* Clean up on error during a "source" command (or execution of a
359 user-defined command). */
362 source_cleanup (stream
)
365 /* Restore the previous input stream. */
369 /* Read commands from STREAM. */
371 read_command_file (stream
)
374 struct cleanup
*cleanups
;
376 cleanups
= make_cleanup (source_cleanup
, instream
);
379 do_cleanups (cleanups
);
388 static int inhibit_gdbinit
= 0;
389 static int quiet
= 0;
390 static int batch
= 0;
392 /* Pointers to various arguments from command line. */
394 char *execarg
= NULL
;
395 char *corearg
= NULL
;
399 /* Pointers to all arguments of +command option. */
401 /* Allocated size of cmdarg. */
403 /* Number of elements of cmdarg used. */
406 /* Indices of all arguments of +directory option. */
408 /* Allocated size. */
410 /* Number of elements used. */
415 /* This needs to happen before the first use of malloc. */
416 init_malloc ((PTR
) NULL
);
418 #if defined (ALIGN_STACK_ON_STARTUP)
419 i
= (int) &count
& 0x3;
424 /* If error() is called from initialization code, just exit */
425 if (setjmp (to_top_level
)) {
430 cmdarg
= (char **) xmalloc (cmdsize
* sizeof (*cmdarg
));
433 dirarg
= (char **) xmalloc (dirsize
* sizeof (*dirarg
));
437 line
= (char *) xmalloc (linesize
);
438 line
[0] = '\0'; /* Terminate saved (now empty) cmd line */
441 getcwd (dirbuf
, sizeof (dirbuf
));
442 current_directory
= dirbuf
;
444 #ifdef SET_STACK_LIMIT_HUGE
448 /* Set the stack limit huge so that alloca (particularly stringtab
449 * in dbxread.c) does not fail. */
450 getrlimit (RLIMIT_STACK
, &rlim
);
451 original_stack_limit
= rlim
.rlim_cur
;
452 rlim
.rlim_cur
= rlim
.rlim_max
;
453 setrlimit (RLIMIT_STACK
, &rlim
);
455 #endif /* SET_STACK_LIMIT_HUGE */
457 /* Parse arguments and options. */
460 static int print_help
;
461 /* When var field is 0, use flag field to record the equivalent
462 short option (or arbitrary numbers starting at 10 for those
463 with no equivalent). */
464 static struct option long_options
[] =
466 {"readnow", no_argument
, &readnow_symbol_files
, 1},
467 {"r", no_argument
, &readnow_symbol_files
, 1},
468 {"mapped", no_argument
, &mapped_symbol_files
, 1},
469 {"m", no_argument
, &mapped_symbol_files
, 1},
470 {"quiet", no_argument
, &quiet
, 1},
471 {"q", no_argument
, &quiet
, 1},
472 {"nx", no_argument
, &inhibit_gdbinit
, 1},
473 {"n", no_argument
, &inhibit_gdbinit
, 1},
474 {"batch", no_argument
, &batch
, 1},
475 {"epoch", no_argument
, &epoch_interface
, 1},
476 {"fullname", no_argument
, &frame_file_full_name
, 1},
477 {"f", no_argument
, &frame_file_full_name
, 1},
478 {"help", no_argument
, &print_help
, 1},
479 {"se", required_argument
, 0, 10},
480 {"symbols", required_argument
, 0, 's'},
481 {"s", required_argument
, 0, 's'},
482 {"exec", required_argument
, 0, 'e'},
483 {"e", required_argument
, 0, 'e'},
484 {"core", required_argument
, 0, 'c'},
485 {"c", required_argument
, 0, 'c'},
486 {"command", required_argument
, 0, 'x'},
487 {"x", required_argument
, 0, 'x'},
488 {"directory", required_argument
, 0, 'd'},
489 {"cd", required_argument
, 0, 11},
490 {"tty", required_argument
, 0, 't'},
491 {"baud", required_argument
, 0, 'b'},
492 {"b", required_argument
, 0, 'b'},
493 /* Allow machine descriptions to add more options... */
494 #ifdef ADDITIONAL_OPTIONS
497 {0, no_argument
, 0, 0},
504 c
= getopt_long_only (argc
, argv
, "",
505 long_options
, &option_index
);
509 /* Long option that takes an argument. */
510 if (c
== 0 && long_options
[option_index
].flag
== 0)
511 c
= long_options
[option_index
].val
;
516 /* Long option that just sets a flag. */
535 cmdarg
[ncmd
++] = optarg
;
539 cmdarg
= (char **) xrealloc ((char *)cmdarg
,
540 cmdsize
* sizeof (*cmdarg
));
544 dirarg
[ndir
++] = optarg
;
548 dirarg
= (char **) xrealloc ((char *)dirarg
,
549 dirsize
* sizeof (*dirarg
));
561 #ifdef ADDITIONAL_OPTION_CASES
562 ADDITIONAL_OPTION_CASES
566 "Use `%s +help' for a complete list of options.\n",
575 This is GDB, the GNU debugger. Use the command\n\
576 gdb [options] [executable [core-file]]\n\
577 to enter the debugger.\n\
579 Options available are:\n\
580 -help Print this message.\n\
581 -quiet Do not print version number on startup.\n\
582 -fullname Output information used by emacs-GDB interface.\n\
583 -epoch Output information used by epoch emacs-GDB interface.\n\
584 -batch Exit after processing options.\n\
585 -nx Do not read .gdbinit file.\n\
586 -tty=TTY Use TTY for input/output by the program being debugged.\n\
587 -cd=DIR Change current directory to DIR.\n\
588 -directory=DIR Search for source files in DIR.\n\
589 -command=FILE Execute GDB commands from FILE.\n\
590 -symbols=SYMFILE Read symbols from SYMFILE.\n\
591 -exec=EXECFILE Use EXECFILE as the executable.\n\
592 -se=FILE Use FILE as symbol file and executable file.\n\
593 -core=COREFILE Analyze the core dump COREFILE.\n\
594 -b BAUDRATE Set serial port baud rate used for remote debugging\n\
596 #ifdef ADDITIONAL_OPTION_HELP
597 fputs (ADDITIONAL_OPTION_HELP
, stderr
);
600 For more information, type \"help\" from within GDB, or consult the\n\
601 GDB manual (available as on-line info or a printed manual).\n", stderr
);
602 /* Exiting after printing this message seems like
603 the most useful thing to do. */
607 /* OK, that's all the options. The other arguments are filenames. */
609 for (; optind
< argc
; optind
++)
613 symarg
= argv
[optind
];
614 execarg
= argv
[optind
];
617 corearg
= argv
[optind
];
621 "Excess command line arguments ignored. (%s%s)\n",
622 argv
[optind
], (optind
== argc
- 1) ? "" : " ...");
629 /* Run the init function of each source file */
631 initialize_cmd_lists (); /* This needs to be done first */
632 initialize_all_files ();
633 initialize_main (); /* But that omits this file! Do it now */
638 /* Print all the junk at the top, with trailing "..." if we are about
639 to read a symbol file (possibly slowly). */
640 print_gnu_advertisement ();
641 print_gdb_version ();
643 printf_filtered ("..");
645 fflush (stdout
); /* Force to screen during slow operations */
648 error_pre_print
= "\n\n";
649 warning_pre_print
= "\n\nwarning: ";
651 /* Now perform all the actions indicated by the arguments. */
654 if (!setjmp (to_top_level
))
656 cd_command (cdarg
, 0);
660 do_cleanups (ALL_CLEANUPS
);
662 for (i
= 0; i
< ndir
; i
++)
663 if (!setjmp (to_top_level
))
664 directory_command (dirarg
[i
], 0);
666 do_cleanups (ALL_CLEANUPS
);
670 && strcmp (execarg
, symarg
) == 0)
672 /* The exec file and the symbol-file are the same. If we can't open
673 it, better only print one error message. */
674 if (!setjmp (to_top_level
))
676 exec_file_command (execarg
, !batch
);
677 symbol_file_command (symarg
, 0);
683 if (!setjmp (to_top_level
))
684 exec_file_command (execarg
, !batch
);
686 if (!setjmp (to_top_level
))
687 symbol_file_command (symarg
, 0);
689 do_cleanups (ALL_CLEANUPS
);
691 /* After the symbol file has been read, print a newline to get us
692 beyond the copyright line... But errors should still set off
693 the error message with a (single) blank line. */
695 printf_filtered ("\n");
696 error_pre_print
= "\n";
697 warning_pre_print
= "\nwarning: ";
699 /* Set the initial language. */
701 struct partial_symtab
*pst
= find_main_psymtab ();
702 enum language lang
= language_unknown
;
705 /* A better solution would set the language when reading the psymtab.
706 This would win for symbol file formats that encode the langauge,
707 such as DWARF. But, we don't do that yet. FIXME */
708 else if (pst
->language
!= language_unknown
)
709 lang
= pst
->language
;
711 else if (pst
->filename
!= NULL
)
712 lang
= deduce_language_from_filename (pst
->filename
);
713 if (lang
== language_unknown
) /* Make C the default language */
719 if (!setjmp (to_top_level
))
720 core_file_command (corearg
, !batch
);
721 else if (isdigit (corearg
[0]) && !setjmp (to_top_level
))
722 attach_command (corearg
, !batch
);
723 do_cleanups (ALL_CLEANUPS
);
726 if (!setjmp (to_top_level
))
727 tty_command (ttyarg
, !batch
);
728 do_cleanups (ALL_CLEANUPS
);
730 #ifdef ADDITIONAL_OPTION_HANDLER
731 ADDITIONAL_OPTION_HANDLER
;
734 /* Error messages should no longer be distinguished with extra output. */
736 warning_pre_print
= "warning: ";
739 struct stat homebuf
, cwdbuf
;
740 char *homedir
, *homeinit
;
742 /* Read init file, if it exists in home directory */
743 homedir
= getenv ("HOME");
746 homeinit
= (char *) alloca (strlen (getenv ("HOME")) +
747 strlen (gdbinit
) + 10);
748 strcpy (homeinit
, getenv ("HOME"));
749 strcat (homeinit
, "/");
750 strcat (homeinit
, gdbinit
);
751 if (!inhibit_gdbinit
&& access (homeinit
, R_OK
) == 0)
752 if (!setjmp (to_top_level
))
753 source_command (homeinit
, 0);
754 do_cleanups (ALL_CLEANUPS
);
756 /* Do stats; no need to do them elsewhere since we'll only
757 need them if homedir is set. Make sure that they are
758 zero in case one of them fails (this guarantees that they
759 won't match if either exists). */
761 memset (&homebuf
, 0, sizeof (struct stat
));
762 memset (&cwdbuf
, 0, sizeof (struct stat
));
764 stat (homeinit
, &homebuf
);
765 stat (gdbinit
, &cwdbuf
); /* We'll only need this if
769 /* Read the input file in the current directory, *if* it isn't
770 the same file (it should exist, also). */
773 || bcmp ((char *) &homebuf
,
775 sizeof (struct stat
)))
776 if (!inhibit_gdbinit
&& access (gdbinit
, R_OK
) == 0)
777 if (!setjmp (to_top_level
))
778 source_command (gdbinit
, 0);
779 do_cleanups (ALL_CLEANUPS
);
782 for (i
= 0; i
< ncmd
; i
++)
783 if (!setjmp (to_top_level
))
785 if (cmdarg
[i
][0] == '-' && cmdarg
[i
][1] == '\0')
786 read_command_file (stdin
);
788 source_command (cmdarg
[i
], !batch
);
789 do_cleanups (ALL_CLEANUPS
);
793 /* Read in the old history after all the command files have been read. */
794 initialize_history();
798 /* We have hit the end of the batch file. */
802 /* Do any host- or target-specific hacks. This is used for i960 targets
803 to force the user to set a nindy target and spec its parameters. */
805 #ifdef BEFORE_MAIN_LOOP_HOOK
806 BEFORE_MAIN_LOOP_HOOK
;
809 /* The command loop. */
813 if (!setjmp (to_top_level
))
815 do_cleanups (ALL_CLEANUPS
); /* Do complete cleanup */
817 quit_command ((char *)0, instream
== stdin
);
820 /* No exit -- exit is through quit_command. */
823 /* Execute the line P as a command.
824 Pass FROM_TTY as second argument to the defining function. */
827 execute_command (p
, from_tty
)
831 register struct cmd_list_element
*c
;
832 register struct command_line
*cmdlines
;
833 register enum language flang
;
834 static const struct language_defn
*saved_language
= 0;
835 static int warned
= 0;
839 /* This can happen when command_line_input hits end of file. */
843 while (*p
== ' ' || *p
== '\t') p
++;
848 c
= lookup_cmd (&p
, cmdlist
, "", 0, 1);
849 /* Pass null arg rather than an empty one. */
851 if (c
->class == class_user
)
853 struct cleanup
*old_chain
;
856 error ("User-defined commands cannot take arguments.");
857 cmdlines
= c
->user_commands
;
862 /* Set the instream to 0, indicating execution of a
863 user-defined function. */
864 old_chain
= make_cleanup (source_cleanup
, instream
);
865 instream
= (FILE *) 0;
868 execute_command (cmdlines
->line
, 0);
869 cmdlines
= cmdlines
->next
;
871 do_cleanups (old_chain
);
873 else if (c
->type
== set_cmd
|| c
->type
== show_cmd
)
874 do_setshow_command (arg
, from_tty
& caution
, c
);
875 else if (c
->function
.cfunc
== NO_FUNCTION
)
876 error ("That is not a command, just a help topic.");
878 (*c
->function
.cfunc
) (arg
, from_tty
& caution
);
881 /* Tell the user if the language has changed (except first time). */
882 if (current_language
!= saved_language
)
884 if (language_mode
== language_mode_auto
) {
886 language_info (1); /* Print what changed. */
888 saved_language
= current_language
;
892 /* Warn the user if the working language does not match the
893 language of the current frame. Only warn the user if we are
894 actually running the program, i.e. there is a stack. */
895 /* FIXME: This should be cacheing the frame and only running when
896 the frame changes. */
897 if (target_has_stack
)
899 flang
= get_frame_language ();
901 && flang
!= language_unknown
902 && flang
!= current_language
->la_language
)
904 printf_filtered ("%s\n", lang_frame_mismatch_warn
);
912 command_loop_marker (foo
)
917 /* Read commands from `instream' and execute them
918 until end of file or error reading instream. */
922 struct cleanup
*old_chain
;
924 int stdin_is_tty
= ISATTY (stdin
);
926 while (!feof (instream
))
928 if (window_hook
&& instream
== stdin
)
929 (*window_hook
) (instream
, prompt
);
932 if (instream
== stdin
&& stdin_is_tty
)
933 reinitialize_more_filter ();
934 old_chain
= make_cleanup (command_loop_marker
, 0);
935 command
= command_line_input (instream
== stdin
? prompt
: (char *) NULL
,
939 execute_command (command
, instream
== stdin
);
940 /* Do any commands attached to breakpoint we stopped at. */
941 bpstat_do_actions (&stop_bpstat
);
942 do_cleanups (old_chain
);
946 /* Commands call this if they do not want to be repeated by null lines. */
951 /* If we aren't reading from standard input, we are saving the last
952 thing read from stdin in line and don't want to delete it. Null lines
953 won't repeat here in any case. */
954 if (instream
== stdin
)
958 /* Read a line from the stream "instream" without command line editing.
960 It prints PRROMPT once at the start.
961 Action is compatible with "readline", e.g. space for the result is
962 malloc'd and should be freed by the caller.
964 A NULL return means end of file. */
966 gdb_readline (prrompt
)
972 int result_size
= 80;
980 result
= (char *) xmalloc (result_size
);
984 /* Read from stdin if we are executing a user defined command.
985 This is the right thing for prompt_for_continue, at least. */
986 c
= fgetc (instream
? instream
: stdin
);
997 result
[input_index
++] = c
;
998 while (input_index
>= result_size
)
1001 result
= (char *) xrealloc (result
, result_size
);
1005 result
[input_index
++] = '\0';
1009 /* Variables which control command line editing and history
1010 substitution. These variables are given default values at the end
1012 static int command_editing_p
;
1013 static int history_expansion_p
;
1014 static int write_history_p
;
1015 static int history_size
;
1016 static char *history_filename
;
1018 /* Variables which are necessary for fancy command line editing. */
1019 char *gdb_completer_word_break_characters
=
1020 " \t\n!@#$%^&*()-+=|~`}{[]\"';:?/>.<,";
1022 /* Functions that are used as part of the fancy command line editing. */
1024 /* This can be used for functions which don't want to complete on symbols
1025 but don't want to complete on anything else either. */
1028 noop_completer (text
)
1034 /* Generate symbol names one by one for the completer. If STATE is
1035 zero, then we need to initialize, otherwise the initialization has
1036 already taken place. TEXT is what we expect the symbol to start
1037 with. RL_LINE_BUFFER is available to be looked at; it contains the
1038 entire text of the line. RL_POINT is the offset in that line of
1039 the cursor. You should pretend that the line ends at RL_POINT.
1040 The result is NULL if there are no more completions, else a char
1041 string which is a possible completion. */
1044 symbol_completion_function (text
, state
)
1048 static char **list
= (char **)NULL
;
1051 extern char *rl_line_buffer
;
1052 extern int rl_point
;
1053 char *tmp_command
, *p
;
1054 struct cmd_list_element
*c
, *result_list
;
1058 /* Free the storage used by LIST, but not by the strings inside. This is
1059 because rl_complete_internal () frees the strings. */
1065 /* Decide whether to complete on a list of gdb commands or on
1067 tmp_command
= (char *) alloca (rl_point
+ 1);
1070 strncpy (tmp_command
, rl_line_buffer
, rl_point
);
1071 tmp_command
[rl_point
] = '\0';
1075 /* An empty line we want to consider ambiguous; that is,
1076 it could be any command. */
1077 c
= (struct cmd_list_element
*) -1;
1081 c
= lookup_cmd_1 (&p
, cmdlist
, &result_list
, 1);
1083 /* Move p up to the next interesting thing. */
1084 while (*p
== ' ' || *p
== '\t')
1088 /* He's typed something unrecognizable. Sigh. */
1090 else if (c
== (struct cmd_list_element
*) -1)
1092 /* If we didn't recognize everything up to the thing that
1093 needs completing, and we don't know what command it is
1094 yet, we are in trouble. Part of the trouble might be
1095 that the list of delimiters used by readline includes
1096 '-', which we use in commands. Check for this. */
1097 if (p
+ strlen(text
) != tmp_command
+ rl_point
) {
1098 if (tmp_command
[rl_point
- strlen(text
) - 1] == '-')
1101 /* This really should not produce an error. Better would
1102 be to pretend to hit RETURN here; this would produce a
1103 response like "Ambiguous command: foo, foobar, etc",
1104 and leave the line available for re-entry with ^P. Instead,
1105 this error blows away the user's typed input without
1106 any way to get it back. */
1107 error (" Unrecognized command.");
1111 /* He's typed something ambiguous. This is easier. */
1113 list
= complete_on_cmdlist (*result_list
->prefixlist
, text
);
1115 list
= complete_on_cmdlist (cmdlist
, text
);
1119 /* If we've gotten this far, gdb has recognized a full
1120 command. There are several possibilities:
1122 1) We need to complete on the command.
1123 2) We need to complete on the possibilities coming after
1125 2) We need to complete the text of what comes after the
1129 /* Always (might be longer versions of thie command). */
1130 list
= complete_on_cmdlist (result_list
, text
);
1131 else if (!*p
&& !*text
)
1134 list
= complete_on_cmdlist (*c
->prefixlist
, "");
1136 list
= (*c
->completer
) ("");
1140 if (c
->prefixlist
&& !c
->allow_unknown
)
1143 /* Something like "info adsfkdj". But error() is not
1144 the proper response; just return no completions
1147 error ("\"%s\" command requires a subcommand.",
1154 list
= (*c
->completer
) (text
);
1159 /* If the debugged program wasn't compiled with symbols, or if we're
1160 clearly completing on a command and no command matches, return
1163 return ((char *)NULL
);
1165 output
= list
[index
];
1177 #if STOP_SIGNAL == SIGTSTP
1178 signal (SIGTSTP
, SIG_DFL
);
1180 kill (getpid (), SIGTSTP
);
1181 signal (SIGTSTP
, stop_sig
);
1183 signal (STOP_SIGNAL
, stop_sig
);
1185 printf ("%s", prompt
);
1188 /* Forget about any previous command -- null line now will do nothing. */
1191 #endif /* STOP_SIGNAL */
1193 /* Initialize signal handlers. */
1203 signal (SIGINT
, request_quit
);
1205 /* If we initialize SIGQUIT to SIG_IGN, then the SIG_IGN will get
1206 passed to the inferior, which we don't want. It would be
1207 possible to do a "signal (SIGQUIT, SIG_DFL)" after we fork, but
1208 on BSD4.3 systems using vfork, that can affect the
1209 GDB process as well as the inferior (the signal handling tables
1210 might be in memory, shared between the two). Since we establish
1211 a handler for SIGQUIT, when we call exec it will set the signal
1212 to SIG_DFL for us. */
1213 signal (SIGQUIT
, do_nothing
);
1214 if (signal (SIGHUP
, do_nothing
) != SIG_IGN
)
1215 signal (SIGHUP
, disconnect
);
1216 signal (SIGFPE
, float_handler
);
1219 /* Read one line from the command input stream `instream'
1220 into the local static buffer `linebuffer' (whose current length
1222 The buffer is made bigger as necessary.
1223 Returns the address of the start of the line.
1225 NULL is returned for end of file.
1227 *If* the instream == stdin & stdin is a terminal, the line read
1228 is copied into the file line saver (global var char *line,
1229 length linesize) so that it can be duplicated.
1231 This routine either uses fancy command line editing or
1232 simple input as the user has requested. */
1235 command_line_input (prrompt
, repeat
)
1239 static char *linebuffer
= 0;
1240 static unsigned linelength
= 0;
1244 char *local_prompt
= prrompt
;
1249 if (linebuffer
== 0)
1252 linebuffer
= (char *) xmalloc (linelength
);
1257 /* Control-C quits instantly if typed while in this loop
1258 since it should not wait until the user types a newline. */
1261 signal (STOP_SIGNAL
, stop_sig
);
1266 /* Reports are that some Sys V's don't flush stdout/err on reads
1267 from stdin, when stdin/out are sockets rather than ttys. So we
1268 have to do it ourselves, to make emacs-gdb and xxgdb work.
1269 On other machines, doing this once per input should be a cheap nop. */
1273 /* Don't use fancy stuff if not talking to stdin. */
1274 if (command_editing_p
&& instream
== stdin
1275 && ISATTY (instream
))
1276 rl
= readline (local_prompt
);
1278 rl
= gdb_readline (local_prompt
);
1280 if (!rl
|| rl
== (char *) EOF
)
1285 if (strlen(rl
) + 1 + (p
- linebuffer
) > linelength
)
1287 linelength
= strlen(rl
) + 1 + (p
- linebuffer
);
1288 nline
= (char *) xrealloc (linebuffer
, linelength
);
1289 p
+= nline
- linebuffer
;
1293 /* Copy line. Don't copy null at end. (Leaves line alone
1294 if this was just a newline) */
1298 free (rl
); /* Allocated in readline. */
1300 if (p
== linebuffer
|| *(p
- 1) != '\\')
1303 p
--; /* Put on top of '\'. */
1304 local_prompt
= (char *) 0;
1308 signal (SIGTSTP
, SIG_DFL
);
1315 /* Do history expansion if that is wished. */
1316 if (history_expansion_p
&& instream
== stdin
1317 && ISATTY (instream
))
1319 char *history_value
;
1322 *p
= '\0'; /* Insert null now. */
1323 expanded
= history_expand (linebuffer
, &history_value
);
1326 /* Print the changes. */
1327 printf ("%s\n", history_value
);
1329 /* If there was an error, call this function again. */
1332 free (history_value
);
1333 return command_line_input (prrompt
, repeat
);
1335 if (strlen (history_value
) > linelength
)
1337 linelength
= strlen (history_value
) + 1;
1338 linebuffer
= (char *) xrealloc (linebuffer
, linelength
);
1340 strcpy (linebuffer
, history_value
);
1341 p
= linebuffer
+ strlen(linebuffer
);
1342 free (history_value
);
1346 /* If we just got an empty line, and that is supposed
1347 to repeat the previous command, return the value in the
1351 if (p
== linebuffer
)
1354 while (*p1
== ' ' || *p1
== '\t')
1362 /* Add line to history if appropriate. */
1363 if (instream
== stdin
1364 && ISATTY (stdin
) && *linebuffer
)
1365 add_history (linebuffer
);
1367 /* Note: lines consisting soley of comments are added to the command
1368 history. This is useful when you type a command, and then
1369 realize you don't want to execute it quite yet. You can comment
1370 out the command and then later fetch it from the value history
1371 and remove the '#'. The kill ring is probably better, but some
1372 people are in the habit of commenting things out. */
1374 while ((c
= *p1
++) != '\0')
1377 while ((c
= *p1
++) != '"')
1379 /* Make sure an escaped '"' doesn't make us think the string
1387 while ((c
= *p1
++) != '\'')
1389 /* Make sure an escaped '\'' doesn't make us think the string
1398 /* Found a comment. */
1404 /* Save into global buffer if appropriate. */
1407 if (linelength
> linesize
)
1409 line
= xrealloc (line
, linelength
);
1410 linesize
= linelength
;
1412 strcpy (line
, linebuffer
);
1419 /* Read lines from the input stream
1420 and accumulate them in a chain of struct command_line's
1421 which is then returned. */
1423 struct command_line
*
1424 read_command_lines ()
1426 struct command_line
*first
= 0;
1427 register struct command_line
*next
, *tail
= 0;
1428 register char *p
, *p1
;
1429 struct cleanup
*old_chain
= 0;
1434 p
= command_line_input ((char *) NULL
, instream
== stdin
);
1436 /* Treat end of file like "end". */
1439 /* Remove leading and trailing blanks. */
1440 while (*p
== ' ' || *p
== '\t') p
++;
1441 p1
= p
+ strlen (p
);
1442 while (p1
!= p
&& (p1
[-1] == ' ' || p1
[-1] == '\t')) p1
--;
1444 /* Is this "end"? */
1445 if (p1
- p
== 3 && !strncmp (p
, "end", 3))
1448 /* No => add this line to the chain of command lines. */
1449 next
= (struct command_line
*) xmalloc (sizeof (struct command_line
));
1450 next
->line
= savestring (p
, p1
- p
);
1458 /* We just read the first line.
1459 From now on, arrange to throw away the lines we have
1460 if we quit or get an error while inside this function. */
1462 old_chain
= make_cleanup (free_command_lines
, &first
);
1469 /* Now we are about to return the chain to our caller,
1470 so freeing it becomes his responsibility. */
1472 discard_cleanups (old_chain
);
1476 /* Free a chain of struct command_line's. */
1479 free_command_lines (lptr
)
1480 struct command_line
**lptr
;
1482 register struct command_line
*l
= *lptr
;
1483 register struct command_line
*next
;
1494 /* Add an element to the list of info subcommands. */
1497 add_info (name
, fun
, doc
)
1499 void (*fun
) PARAMS ((char *, int));
1502 add_cmd (name
, no_class
, fun
, doc
, &infolist
);
1505 /* Add an alias to the list of info subcommands. */
1508 add_info_alias (name
, oldname
, abbrev_flag
)
1513 add_alias_cmd (name
, oldname
, 0, abbrev_flag
, &infolist
);
1516 /* The "info" command is defined as a prefix, with allow_unknown = 0.
1517 Therefore, its own definition is called only for "info" with no args. */
1521 info_command (arg
, from_tty
)
1525 printf ("\"info\" must be followed by the name of an info command.\n");
1526 help_list (infolist
, "info ", -1, stdout
);
1529 /* The "show" command with no arguments shows all the settings. */
1533 show_command (arg
, from_tty
)
1537 cmd_show_list (showlist
, from_tty
, "");
1540 /* Add an element to the list of commands. */
1543 add_com (name
, class, fun
, doc
)
1545 enum command_class
class;
1546 void (*fun
) PARAMS ((char *, int));
1549 add_cmd (name
, class, fun
, doc
, &cmdlist
);
1552 /* Add an alias or abbreviation command to the list of commands. */
1555 add_com_alias (name
, oldname
, class, abbrev_flag
)
1558 enum command_class
class;
1561 add_alias_cmd (name
, oldname
, class, abbrev_flag
, &cmdlist
);
1568 error ("Argument required (%s).", why
);
1573 help_command (command
, from_tty
)
1575 int from_tty
; /* Ignored */
1577 help_cmd (command
, stdout
);
1581 validate_comname (comname
)
1587 error_no_arg ("name of command to define");
1592 if (!(*p
>= 'A' && *p
<= 'Z')
1593 && !(*p
>= 'a' && *p
<= 'z')
1594 && !(*p
>= '0' && *p
<= '9')
1596 error ("Junk in argument list: \"%s\"", p
);
1603 lowercase (char *str
)
1607 /* isupper(), tolower() are function calls in AIX. */
1608 if ( *str
>= 'A' && *str
<= 'Z')
1609 *str
= *str
+ 'a' - 'A';
1616 define_command (comname
, from_tty
)
1620 register struct command_line
*cmds
;
1621 register struct cmd_list_element
*c
, *newc
;
1622 char *tem
= comname
;
1624 validate_comname (comname
);
1628 /* If the rest of the commands will be case insensetive, this one
1629 should behave in the same manner. */
1631 lowercase (comname
);
1634 /* Look it up, and verify that we got an exact match. */
1635 c
= lookup_cmd (&tem
, cmdlist
, "", -1, 1);
1636 if (c
&& 0 != strcmp (comname
, c
->name
))
1641 if (c
->class == class_user
|| c
->class == class_alias
)
1642 tem
= "Redefine command \"%s\"? ";
1644 tem
= "Really redefine built-in command \"%s\"? ";
1645 if (!query (tem
, comname
))
1646 error ("Command \"%s\" not redefined.", comname
);
1651 printf ("Type commands for definition of \"%s\".\n\
1652 End with a line saying just \"end\".\n", comname
);
1655 comname
= savestring (comname
, strlen (comname
));
1657 cmds
= read_command_lines ();
1659 if (c
&& c
->class == class_user
)
1660 free_command_lines (&c
->user_commands
);
1662 newc
= add_cmd (comname
, class_user
, not_just_help_class_command
,
1663 (c
&& c
->class == class_user
)
1664 ? c
->doc
: savestring ("User-defined.", 13), &cmdlist
);
1665 newc
->user_commands
= cmds
;
1669 document_command (comname
, from_tty
)
1673 struct command_line
*doclines
;
1674 register struct cmd_list_element
*c
;
1675 char *tem
= comname
;
1677 validate_comname (comname
);
1679 c
= lookup_cmd (&tem
, cmdlist
, "", 0, 1);
1681 if (c
->class != class_user
)
1682 error ("Command \"%s\" is built-in.", comname
);
1685 printf ("Type documentation for \"%s\".\n\
1686 End with a line saying just \"end\".\n", comname
);
1688 doclines
= read_command_lines ();
1690 if (c
->doc
) free (c
->doc
);
1693 register struct command_line
*cl1
;
1694 register int len
= 0;
1696 for (cl1
= doclines
; cl1
; cl1
= cl1
->next
)
1697 len
+= strlen (cl1
->line
) + 1;
1699 c
->doc
= (char *) xmalloc (len
+ 1);
1702 for (cl1
= doclines
; cl1
; cl1
= cl1
->next
)
1704 strcat (c
->doc
, cl1
->line
);
1706 strcat (c
->doc
, "\n");
1710 free_command_lines (&doclines
);
1714 print_gnu_advertisement()
1717 GDB is free software and you are welcome to distribute copies of it\n\
1718 under certain conditions; type \"show copying\" to see the conditions.\n\
1719 There is absolutely no warranty for GDB; type \"show warranty\" for details.\n\
1724 print_gdb_version ()
1727 GDB %s, Copyright 1992 Free Software Foundation, Inc.",
1733 show_version (args
, from_tty
)
1738 print_gnu_advertisement ();
1739 print_gdb_version ();
1740 printf_filtered ("\n");
1744 /* xgdb calls this to reprint the usual GDB prompt. */
1749 printf ("%s", prompt
);
1754 quit_command (args
, from_tty
)
1758 if (inferior_pid
!= 0 && target_has_execution
)
1760 if (query ("The program is running. Quit anyway? "))
1765 error ("Not confirmed.");
1767 /* Save the history information if it is appropriate to do so. */
1768 if (write_history_p
&& history_filename
)
1769 write_history (history_filename
);
1773 /* Returns whether GDB is running on a terminal and whether the user
1774 desires that questions be asked of them on that terminal. */
1777 input_from_terminal_p ()
1779 return gdb_has_a_terminal
&& (instream
== stdin
) & caution
;
1784 pwd_command (args
, from_tty
)
1788 if (args
) error ("The \"pwd\" command does not take an argument: %s", args
);
1789 getcwd (dirbuf
, sizeof (dirbuf
));
1791 if (strcmp (dirbuf
, current_directory
))
1792 printf ("Working directory %s\n (canonically %s).\n",
1793 current_directory
, dirbuf
);
1795 printf ("Working directory %s.\n", current_directory
);
1799 cd_command (dir
, from_tty
)
1806 /* If the new directory is absolute, repeat is a no-op; if relative,
1807 repeat might be useful but is more likely to be a mistake. */
1811 error_no_arg ("new working directory");
1813 dir
= tilde_expand (dir
);
1814 make_cleanup (free
, dir
);
1816 if (chdir (dir
) < 0)
1817 perror_with_name (dir
);
1820 dir
= savestring (dir
, len
- (len
> 1 && dir
[len
-1] == '/'));
1822 current_directory
= dir
;
1825 current_directory
= concat (current_directory
, "/", dir
, NULL
);
1829 /* Now simplify any occurrences of `.' and `..' in the pathname. */
1837 for (p
= current_directory
; *p
;)
1839 if (!strncmp (p
, "/./", 2)
1840 && (p
[2] == 0 || p
[2] == '/'))
1842 else if (!strncmp (p
, "/..", 3)
1843 && (p
[3] == 0 || p
[3] == '/')
1844 && p
!= current_directory
)
1847 while (q
!= current_directory
&& q
[-1] != '/') q
--;
1848 if (q
!= current_directory
)
1858 forget_cached_source_info ();
1861 pwd_command ((char *) 0, 1);
1866 source_command (args
, from_tty
)
1871 struct cleanup
*cleanups
;
1875 /* Let source without arguments read .gdbinit. */
1878 file
= tilde_expand (file
);
1879 make_cleanup (free
, file
);
1881 stream
= fopen (file
, "r");
1883 perror_with_name (file
);
1885 cleanups
= make_cleanup (fclose
, stream
);
1887 read_command_file (stream
);
1889 do_cleanups (cleanups
);
1894 echo_command (text
, from_tty
)
1906 /* \ at end of argument is used after spaces
1907 so they won't be lost. */
1911 c
= parse_escape (&p
);
1913 printf_filtered ("%c", c
);
1916 printf_filtered ("%c", c
);
1919 /* Force this output to appear now. */
1926 dump_me_command (args
, from_tty
)
1930 if (query ("Should GDB dump core? "))
1932 signal (SIGQUIT
, SIG_DFL
);
1933 kill (getpid (), SIGQUIT
);
1937 /* Functions to manipulate command line editing control variables. */
1939 /* Number of commands to print in each call to show_commands. */
1940 #define Hist_print 10
1942 show_commands (args
, from_tty
)
1946 /* Index for history commands. Relative to history_base. */
1949 /* Number of the history entry which we are planning to display next.
1950 Relative to history_base. */
1953 /* The first command in the history which doesn't exist (i.e. one more
1954 than the number of the last command). Relative to history_base. */
1957 extern struct _hist_entry
*history_get
PARAMS ((int));
1958 extern int history_base
;
1960 /* Print out some of the commands from the command history. */
1961 /* First determine the length of the history list. */
1962 hist_len
= history_size
;
1963 for (offset
= 0; offset
< history_size
; offset
++)
1965 if (!history_get (history_base
+ offset
))
1974 if (args
[0] == '+' && args
[1] == '\0')
1975 /* "info editing +" should print from the stored position. */
1978 /* "info editing <exp>" should print around command number <exp>. */
1979 num
= (parse_and_eval_address (args
) - history_base
) - Hist_print
/ 2;
1981 /* "show commands" means print the last Hist_print commands. */
1984 num
= hist_len
- Hist_print
;
1990 /* If there are at least Hist_print commands, we want to display the last
1991 Hist_print rather than, say, the last 6. */
1992 if (hist_len
- num
< Hist_print
)
1994 num
= hist_len
- Hist_print
;
1999 for (offset
= num
; offset
< num
+ Hist_print
&& offset
< hist_len
; offset
++)
2001 printf_filtered ("%5d %s\n", history_base
+ offset
,
2002 (history_get (history_base
+ offset
))->line
);
2005 /* The next command we want to display is the next one that we haven't
2009 /* If the user repeats this command with return, it should do what
2010 "show commands +" does. This is unnecessary if arg is null,
2011 because "show commands +" is not useful after "show commands". */
2012 if (from_tty
&& args
)
2019 /* Called by do_setshow_command. */
2022 set_history_size_command (args
, from_tty
, c
)
2025 struct cmd_list_element
*c
;
2027 if (history_size
== UINT_MAX
)
2028 unstifle_history ();
2030 stifle_history (history_size
);
2035 set_history (args
, from_tty
)
2039 printf ("\"set history\" must be followed by the name of a history subcommand.\n");
2040 help_list (sethistlist
, "set history ", -1, stdout
);
2045 show_history (args
, from_tty
)
2049 cmd_show_list (showhistlist
, from_tty
, "");
2052 int info_verbose
= 0; /* Default verbose msgs off */
2054 /* Called by do_setshow_command. An elaborate joke. */
2057 set_verbose (args
, from_tty
, c
)
2060 struct cmd_list_element
*c
;
2062 char *cmdname
= "verbose";
2063 struct cmd_list_element
*showcmd
;
2065 showcmd
= lookup_cmd_1 (&cmdname
, showlist
, NULL
, 1);
2069 c
->doc
= "Set verbose printing of informational messages.";
2070 showcmd
->doc
= "Show verbose printing of informational messages.";
2074 c
->doc
= "Set verbosity.";
2075 showcmd
->doc
= "Show verbosity.";
2080 float_handler (signo
)
2083 /* This message is based on ANSI C, section 4.7. Note that integer
2084 divide by zero causes this, so "float" is a misnomer. */
2085 error ("Erroneous arithmetic operation.");
2088 /* Return whether we are running a batch file or from terminal. */
2092 return !(instream
== stdin
&& ISATTY (stdin
));
2097 initialize_cmd_lists ()
2099 cmdlist
= (struct cmd_list_element
*) 0;
2100 infolist
= (struct cmd_list_element
*) 0;
2101 enablelist
= (struct cmd_list_element
*) 0;
2102 disablelist
= (struct cmd_list_element
*) 0;
2103 deletelist
= (struct cmd_list_element
*) 0;
2104 enablebreaklist
= (struct cmd_list_element
*) 0;
2105 setlist
= (struct cmd_list_element
*) 0;
2107 sethistlist
= (struct cmd_list_element
*) 0;
2108 showhistlist
= NULL
;
2109 unsethistlist
= (struct cmd_list_element
*) 0;
2112 /* Init the history buffer. Note that we are called after the init file(s)
2113 * have been read so that the user can change the history file via his
2114 * .gdbinit file (for instance). The GDBHISTFILE environment variable
2115 * overrides all of this.
2119 initialize_history()
2123 tmpenv
= getenv ("HISTSIZE");
2125 history_size
= atoi (tmpenv
);
2126 else if (!history_size
)
2129 stifle_history (history_size
);
2131 tmpenv
= getenv ("GDBHISTFILE");
2133 history_filename
= savestring (tmpenv
, strlen(tmpenv
));
2134 else if (!history_filename
) {
2135 /* We include the current directory so that if the user changes
2136 directories the file written will be the same as the one
2138 history_filename
= concat (current_directory
, "/.gdb_history", NULL
);
2140 read_history (history_filename
);
2146 struct cmd_list_element
*c
;
2148 #ifdef DEFAULT_PROMPT
2149 prompt
= savestring (DEFAULT_PROMPT
, strlen(DEFAULT_PROMPT
));
2151 prompt
= savestring ("(gdb) ", 6);
2154 /* Set the important stuff up for command editing. */
2155 command_editing_p
= 1;
2156 history_expansion_p
= 0;
2157 write_history_p
= 0;
2159 /* Setup important stuff for command line editing. */
2160 rl_completion_entry_function
= (int (*)()) symbol_completion_function
;
2161 rl_completer_word_break_characters
= gdb_completer_word_break_characters
;
2162 rl_readline_name
= "gdb";
2164 /* Define the classes of commands.
2165 They will appear in the help list in the reverse of this order. */
2167 add_cmd ("obscure", class_obscure
, NO_FUNCTION
, "Obscure features.", &cmdlist
);
2168 add_cmd ("aliases", class_alias
, NO_FUNCTION
, "Aliases of other commands.", &cmdlist
);
2169 add_cmd ("user-defined", class_user
, NO_FUNCTION
, "User-defined commands.\n\
2170 The commands in this class are those defined by the user.\n\
2171 Use the \"define\" command to define a command.", &cmdlist
);
2172 add_cmd ("support", class_support
, NO_FUNCTION
, "Support facilities.", &cmdlist
);
2173 add_cmd ("status", class_info
, NO_FUNCTION
, "Status inquiries.", &cmdlist
);
2174 add_cmd ("files", class_files
, NO_FUNCTION
, "Specifying and examining files.", &cmdlist
);
2175 add_cmd ("breakpoints", class_breakpoint
, NO_FUNCTION
, "Making program stop at certain points.", &cmdlist
);
2176 add_cmd ("data", class_vars
, NO_FUNCTION
, "Examining data.", &cmdlist
);
2177 add_cmd ("stack", class_stack
, NO_FUNCTION
, "Examining the stack.\n\
2178 The stack is made up of stack frames. Gdb assigns numbers to stack frames\n\
2179 counting from zero for the innermost (currently executing) frame.\n\n\
2180 At any time gdb identifies one frame as the \"selected\" frame.\n\
2181 Variable lookups are done with respect to the selected frame.\n\
2182 When the program being debugged stops, gdb selects the innermost frame.\n\
2183 The commands below can be used to select other frames by number or address.",
2185 add_cmd ("running", class_run
, NO_FUNCTION
, "Running the program.", &cmdlist
);
2187 add_com ("pwd", class_files
, pwd_command
,
2188 "Print working directory. This is used for your program as well.");
2189 add_com ("cd", class_files
, cd_command
,
2190 "Set working directory to DIR for debugger and program being debugged.\n\
2191 The change does not take effect for the program being debugged\n\
2192 until the next time it is started.");
2195 (add_set_cmd ("prompt", class_support
, var_string
, (char *)&prompt
,
2200 add_com ("echo", class_support
, echo_command
,
2201 "Print a constant string. Give string as argument.\n\
2202 C escape sequences may be used in the argument.\n\
2203 No newline is added at the end of the argument;\n\
2204 use \"\\n\" if you want a newline to be printed.\n\
2205 Since leading and trailing whitespace are ignored in command arguments,\n\
2206 if you want to print some you must use \"\\\" before leading whitespace\n\
2207 to be printed or after trailing whitespace.");
2208 add_com ("document", class_support
, document_command
,
2209 "Document a user-defined command.\n\
2210 Give command name as argument. Give documentation on following lines.\n\
2211 End with a line of just \"end\".");
2212 add_com ("define", class_support
, define_command
,
2213 "Define a new command name. Command name is argument.\n\
2214 Definition appears on following lines, one command per line.\n\
2215 End with a line of just \"end\".\n\
2216 Use the \"document\" command to give documentation for the new command.\n\
2217 Commands defined in this way do not take arguments.");
2220 add_com ("source", class_support
, source_command
,
2221 "Read commands from a file named FILE.\n\
2222 Note that the file \"" GDBINIT_FILENAME
"\" is read automatically in this way\n\
2223 when gdb is started.");
2225 /* Punt file name, we can't help it easily. */
2226 add_com ("source", class_support
, source_command
,
2227 "Read commands from a file named FILE.\n\
2228 Note that the file \".gdbinit\" is read automatically in this way\n\
2229 when gdb is started.");
2232 add_com ("quit", class_support
, quit_command
, "Exit gdb.");
2233 add_com ("help", class_support
, help_command
, "Print list of commands.");
2234 add_com_alias ("q", "quit", class_support
, 1);
2235 add_com_alias ("h", "help", class_support
, 1);
2238 c
= add_set_cmd ("verbose", class_support
, var_boolean
, (char *)&info_verbose
,
2241 add_show_from_set (c
, &showlist
);
2242 c
->function
.sfunc
= set_verbose
;
2243 set_verbose (NULL
, 0, c
);
2245 add_com ("dump-me", class_obscure
, dump_me_command
,
2246 "Get fatal error; make debugger dump its core.");
2249 (add_set_cmd ("editing", class_support
, var_boolean
, (char *)&command_editing_p
,
2250 "Set editing of command lines as they are typed.\n\
2251 Use \"on\" to enable to enable the editing, and \"off\" to disable it.\n\
2252 Without an argument, command line editing is enabled. To edit, use\n\
2253 EMACS-like or VI-like commands like control-P or ESC.", &setlist
),
2256 add_prefix_cmd ("history", class_support
, set_history
,
2257 "Generic command for setting command history parameters.",
2258 &sethistlist
, "set history ", 0, &setlist
);
2259 add_prefix_cmd ("history", class_support
, show_history
,
2260 "Generic command for showing command history parameters.",
2261 &showhistlist
, "show history ", 0, &showlist
);
2264 (add_set_cmd ("expansion", no_class
, var_boolean
, (char *)&history_expansion_p
,
2265 "Set history expansion on command input.\n\
2266 Without an argument, history expansion is enabled.", &sethistlist
),
2270 (add_set_cmd ("save", no_class
, var_boolean
, (char *)&write_history_p
,
2271 "Set saving of the history record on exit.\n\
2272 Use \"on\" to enable to enable the saving, and \"off\" to disable it.\n\
2273 Without an argument, saving is enabled.", &sethistlist
),
2276 c
= add_set_cmd ("size", no_class
, var_uinteger
, (char *)&history_size
,
2277 "Set the size of the command history, \n\
2278 ie. the number of previous commands to keep a record of.", &sethistlist
);
2279 add_show_from_set (c
, &showhistlist
);
2280 c
->function
.sfunc
= set_history_size_command
;
2283 (add_set_cmd ("filename", no_class
, var_filename
, (char *)&history_filename
,
2284 "Set the filename in which to record the command history\n\
2285 (the list of previous commands of which a record is kept).", &sethistlist
),
2289 (add_set_cmd ("confirm", class_support
, var_boolean
,
2291 "Set whether to confirm potentially dangerous operations.",
2295 add_prefix_cmd ("info", class_info
, info_command
,
2296 "Generic command for showing things about the program being debugged.",
2297 &infolist
, "info ", 0, &cmdlist
);
2298 add_com_alias ("i", "info", class_info
, 1);
2300 add_prefix_cmd ("show", class_info
, show_command
,
2301 "Generic command for showing things about the debugger.",
2302 &showlist
, "show ", 0, &cmdlist
);
2303 /* Another way to get at the same thing. */
2304 add_info ("set", show_command
, "Show all GDB settings.");
2306 add_cmd ("commands", no_class
, show_commands
,
2307 "Show the the history of commands you typed.\n\
2308 You can supply a command number to start with, or a `+' to start after\n\
2309 the previous command number shown.",
2312 add_cmd ("version", no_class
, show_version
,
2313 "Show what version of GDB this is.", &showlist
);