1 /* Top level `main' program for GDB, the GNU debugger.
2 Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992
3 Free Software Foundation, Inc.
5 This file is part of GDB.
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.
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.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
23 #include "call-cmds.h"
28 #include "breakpoint.h"
30 #include "expression.h"
35 /* readline include files */
39 /* readline defines this. */
43 #include <sys/types.h>
52 #include <sys/param.h>
56 #ifdef SET_STACK_LIMIT_HUGE
58 #include <sys/resource.h>
60 int original_stack_limit
;
63 /* Prototypes for local functions */
66 symbol_completion_function
PARAMS ((char *, int));
69 command_loop
PARAMS ((void));
72 command_loop_marker
PARAMS ((int));
75 print_gdb_version
PARAMS ((void));
78 quit_command
PARAMS ((char *, int));
81 initialize_main
PARAMS ((void));
84 initialize_history
PARAMS ((void));
87 initialize_cmd_lists
PARAMS ((void));
90 float_handler
PARAMS ((int));
93 source_command
PARAMS ((char *, int));
96 cd_command
PARAMS ((char *, int));
99 print_gnu_advertisement
PARAMS ((void));
102 init_signals
PARAMS ((void));
105 read_command_file
PARAMS ((FILE *));
108 set_verbose
PARAMS ((char *, int, struct cmd_list_element
*));
111 show_history
PARAMS ((char *, int));
114 set_history
PARAMS ((char *, int));
117 set_history_size_command
PARAMS ((char *, int, struct cmd_list_element
*));
120 show_commands
PARAMS ((char *, int));
123 echo_command
PARAMS ((char *, int));
126 pwd_command
PARAMS ((char *, int));
129 show_version
PARAMS ((char *, int));
132 document_command
PARAMS ((char *, int));
135 define_command
PARAMS ((char *, int));
138 validate_comname
PARAMS ((char *));
141 help_command
PARAMS ((char *, int));
144 show_command
PARAMS ((char *, int));
147 info_command
PARAMS ((char *, int));
150 do_nothing
PARAMS ((int));
153 quit_cover
PARAMS ((char *));
156 disconnect
PARAMS ((int));
159 source_cleanup
PARAMS ((FILE *));
161 /* If this definition isn't overridden by the header files, assume
162 that isatty and fileno exist on this system. */
164 #define ISATTY(FP) (isatty (fileno (FP)))
167 /* Initialization file name for gdb. This is overridden in some configs. */
169 #ifndef GDBINIT_FILENAME
170 #define GDBINIT_FILENAME ".gdbinit"
172 char gdbinit
[] = GDBINIT_FILENAME
;
174 #define ALL_CLEANUPS ((struct cleanup *)0)
176 /* Version number of GDB, as a string. */
178 extern char *version
;
180 /* Message to be printed before the error message, when an error occurs. */
182 extern char *error_pre_print
;
184 /* Message to be printed before the warning message, when a warning occurs. */
186 extern char *warning_pre_print
;
188 extern char lang_frame_mismatch_warn
[]; /* language.c */
190 /* Whether GDB's stdin is on a terminal. */
192 extern int gdb_has_a_terminal
; /* inflow.c */
194 /* Flag for whether we want all the "from_tty" gubbish printed. */
196 int caution
= 1; /* Default is yes, sigh. */
199 * Define all cmd_list_element's
202 /* Chain containing all defined commands. */
204 struct cmd_list_element
*cmdlist
;
206 /* Chain containing all defined info subcommands. */
208 struct cmd_list_element
*infolist
;
210 /* Chain containing all defined enable subcommands. */
212 struct cmd_list_element
*enablelist
;
214 /* Chain containing all defined disable subcommands. */
216 struct cmd_list_element
*disablelist
;
218 /* Chain containing all defined delete subcommands. */
220 struct cmd_list_element
*deletelist
;
222 /* Chain containing all defined "enable breakpoint" subcommands. */
224 struct cmd_list_element
*enablebreaklist
;
226 /* Chain containing all defined set subcommands */
228 struct cmd_list_element
*setlist
;
230 /* Chain containing all defined unset subcommands */
232 struct cmd_list_element
*unsetlist
;
234 /* Chain containing all defined show subcommands. */
236 struct cmd_list_element
*showlist
;
238 /* Chain containing all defined \"set history\". */
240 struct cmd_list_element
*sethistlist
;
242 /* Chain containing all defined \"show history\". */
244 struct cmd_list_element
*showhistlist
;
246 /* Chain containing all defined \"unset history\". */
248 struct cmd_list_element
*unsethistlist
;
250 /* Chain containing all defined maintenance subcommands. */
253 struct cmd_list_element
*maintenancelist
;
256 /* Chain containing all defined "maintenance info" subcommands. */
259 struct cmd_list_element
*maintenanceinfolist
;
262 /* Chain containing all defined "maintenance print" subcommands. */
265 struct cmd_list_element
*maintenanceprintlist
;
268 struct cmd_list_element
*setprintlist
;
270 struct cmd_list_element
*showprintlist
;
272 struct cmd_list_element
*setchecklist
;
274 struct cmd_list_element
*showchecklist
;
276 /* stdio stream that command input is being read from. */
280 /* Current working directory. */
282 char *current_directory
;
284 /* The directory name is actually stored here (usually). */
285 static char dirbuf
[1024];
287 /* Function to call before reading a command, if nonzero.
288 The function receives two args: an input stream,
289 and a prompt string. */
291 void (*window_hook
) PARAMS ((FILE *, char *));
293 extern int frame_file_full_name
;
294 extern int mapped_symbol_files
;
295 extern int readnow_symbol_files
;
300 /* gdb prints this when reading a command interactively */
303 /* Buffer used for reading command lines, and the size
304 allocated for it so far. */
309 /* Baud rate specified for talking to serial target systems. Default
310 is left as a zero pointer, so targets can choose their own defaults. */
314 /* Signal to catch ^Z typed while reading a command: SIGTSTP or SIGCONT. */
318 #define STOP_SIGNAL SIGTSTP
319 static void stop_sig
PARAMS ((int));
323 /* Some System V have job control but not sigsetmask(). */
324 #if !defined (HAVE_SIGSETMASK)
325 #define HAVE_SIGSETMASK !defined (USG)
328 #if 0 == (HAVE_SIGSETMASK)
329 #define sigsetmask(n)
332 /* This is how `error' returns to command level. */
334 jmp_buf to_top_level
;
337 return_to_top_level ()
341 bpstat_clear_actions(stop_bpstat
); /* Clear queued breakpoint commands */
342 disable_current_display ();
343 do_cleanups (ALL_CLEANUPS
);
344 (NORETURN
void) longjmp (to_top_level
, 1);
347 /* Call FUNC with arg ARGS, catching any errors.
348 If there is no error, return the value returned by FUNC.
349 If there is an error, print ERRSTRING, print the specific error message,
353 catch_errors (func
, args
, errstring
)
354 int (*func
) PARAMS ((char *));
360 struct cleanup
*saved_cleanup_chain
;
361 char *saved_error_pre_print
;
363 saved_cleanup_chain
= save_cleanups ();
364 saved_error_pre_print
= error_pre_print
;
366 memcpy ((char *)saved
, (char *)to_top_level
, sizeof (jmp_buf));
367 error_pre_print
= errstring
;
369 if (setjmp (to_top_level
) == 0)
370 val
= (*func
) (args
);
374 restore_cleanups (saved_cleanup_chain
);
376 error_pre_print
= saved_error_pre_print
;
377 memcpy ((char *)to_top_level
, (char *)saved
, sizeof (jmp_buf));
381 /* Handler for SIGHUP. */
387 catch_errors (quit_cover
, NULL
, "Could not kill inferior process");
388 signal (SIGHUP
, SIG_DFL
);
389 kill (getpid (), SIGHUP
);
392 /* Just a little helper function for disconnect(). */
398 caution
= 0; /* Throw caution to the wind -- we're exiting.
399 This prevents asking the user dumb questions. */
400 quit_command((char *)0, 0);
404 /* Clean up on error during a "source" command (or execution of a
405 user-defined command). */
408 source_cleanup (stream
)
411 /* Restore the previous input stream. */
415 /* Read commands from STREAM. */
417 read_command_file (stream
)
420 struct cleanup
*cleanups
;
422 cleanups
= make_cleanup (source_cleanup
, instream
);
425 do_cleanups (cleanups
);
434 static int inhibit_gdbinit
= 0;
435 static int quiet
= 0;
436 static int batch
= 0;
438 /* Pointers to various arguments from command line. */
440 char *execarg
= NULL
;
441 char *corearg
= NULL
;
445 /* Pointers to all arguments of +command option. */
447 /* Allocated size of cmdarg. */
449 /* Number of elements of cmdarg used. */
452 /* Indices of all arguments of +directory option. */
454 /* Allocated size. */
456 /* Number of elements used. */
459 struct stat homebuf
, cwdbuf
;
460 char *homedir
, *homeinit
;
464 /* This needs to happen before the first use of malloc. */
465 init_malloc ((PTR
) NULL
);
467 #if defined (ALIGN_STACK_ON_STARTUP)
468 i
= (int) &count
& 0x3;
473 /* If error() is called from initialization code, just exit */
474 if (setjmp (to_top_level
)) {
479 cmdarg
= (char **) xmalloc (cmdsize
* sizeof (*cmdarg
));
482 dirarg
= (char **) xmalloc (dirsize
* sizeof (*dirarg
));
486 line
= (char *) xmalloc (linesize
);
487 line
[0] = '\0'; /* Terminate saved (now empty) cmd line */
490 getcwd (dirbuf
, sizeof (dirbuf
));
491 current_directory
= dirbuf
;
493 #ifdef SET_STACK_LIMIT_HUGE
497 /* Set the stack limit huge so that alloca (particularly stringtab
498 * in dbxread.c) does not fail. */
499 getrlimit (RLIMIT_STACK
, &rlim
);
500 original_stack_limit
= rlim
.rlim_cur
;
501 rlim
.rlim_cur
= rlim
.rlim_max
;
502 setrlimit (RLIMIT_STACK
, &rlim
);
504 #endif /* SET_STACK_LIMIT_HUGE */
506 /* Parse arguments and options. */
509 static int print_help
;
510 /* When var field is 0, use flag field to record the equivalent
511 short option (or arbitrary numbers starting at 10 for those
512 with no equivalent). */
513 static struct option long_options
[] =
515 {"readnow", no_argument
, &readnow_symbol_files
, 1},
516 {"r", no_argument
, &readnow_symbol_files
, 1},
517 {"mapped", no_argument
, &mapped_symbol_files
, 1},
518 {"m", no_argument
, &mapped_symbol_files
, 1},
519 {"quiet", no_argument
, &quiet
, 1},
520 {"q", no_argument
, &quiet
, 1},
521 {"nx", no_argument
, &inhibit_gdbinit
, 1},
522 {"n", no_argument
, &inhibit_gdbinit
, 1},
523 {"batch", no_argument
, &batch
, 1},
524 {"epoch", no_argument
, &epoch_interface
, 1},
525 {"fullname", no_argument
, &frame_file_full_name
, 1},
526 {"f", no_argument
, &frame_file_full_name
, 1},
527 {"help", no_argument
, &print_help
, 1},
528 {"se", required_argument
, 0, 10},
529 {"symbols", required_argument
, 0, 's'},
530 {"s", required_argument
, 0, 's'},
531 {"exec", required_argument
, 0, 'e'},
532 {"e", required_argument
, 0, 'e'},
533 {"core", required_argument
, 0, 'c'},
534 {"c", required_argument
, 0, 'c'},
535 {"command", required_argument
, 0, 'x'},
536 {"x", required_argument
, 0, 'x'},
537 {"directory", required_argument
, 0, 'd'},
538 {"cd", required_argument
, 0, 11},
539 {"tty", required_argument
, 0, 't'},
540 {"baud", required_argument
, 0, 'b'},
541 {"b", required_argument
, 0, 'b'},
542 /* Allow machine descriptions to add more options... */
543 #ifdef ADDITIONAL_OPTIONS
546 {0, no_argument
, 0, 0},
553 c
= getopt_long_only (argc
, argv
, "",
554 long_options
, &option_index
);
558 /* Long option that takes an argument. */
559 if (c
== 0 && long_options
[option_index
].flag
== 0)
560 c
= long_options
[option_index
].val
;
565 /* Long option that just sets a flag. */
584 cmdarg
[ncmd
++] = optarg
;
588 cmdarg
= (char **) xrealloc ((char *)cmdarg
,
589 cmdsize
* sizeof (*cmdarg
));
593 dirarg
[ndir
++] = optarg
;
597 dirarg
= (char **) xrealloc ((char *)dirarg
,
598 dirsize
* sizeof (*dirarg
));
610 #ifdef ADDITIONAL_OPTION_CASES
611 ADDITIONAL_OPTION_CASES
615 "Use `%s +help' for a complete list of options.\n",
624 This is GDB, the GNU debugger. Use the command\n\
625 gdb [options] [executable [core-file]]\n\
626 to enter the debugger.\n\
628 Options available are:\n\
629 -help Print this message.\n\
630 -quiet Do not print version number on startup.\n\
631 -fullname Output information used by emacs-GDB interface.\n\
632 -epoch Output information used by epoch emacs-GDB interface.\n\
633 -batch Exit after processing options.\n\
634 -nx Do not read .gdbinit file.\n\
635 -tty=TTY Use TTY for input/output by the program being debugged.\n\
636 -cd=DIR Change current directory to DIR.\n\
637 -directory=DIR Search for source files in DIR.\n\
638 -command=FILE Execute GDB commands from FILE.\n\
639 -symbols=SYMFILE Read symbols from SYMFILE.\n\
640 -exec=EXECFILE Use EXECFILE as the executable.\n\
641 -se=FILE Use FILE as symbol file and executable file.\n\
642 -core=COREFILE Analyze the core dump COREFILE.\n\
643 -b BAUDRATE Set serial port baud rate used for remote debugging.\n\
644 -mapped Use mapped symbol files if supported on this system.\n\
645 -readnow Fully read symbol files on first access.\n\
647 #ifdef ADDITIONAL_OPTION_HELP
648 fputs (ADDITIONAL_OPTION_HELP
, stderr
);
651 For more information, type \"help\" from within GDB, or consult the\n\
652 GDB manual (available as on-line info or a printed manual).\n", stderr
);
653 /* Exiting after printing this message seems like
654 the most useful thing to do. */
658 /* OK, that's all the options. The other arguments are filenames. */
660 for (; optind
< argc
; optind
++)
664 symarg
= argv
[optind
];
665 execarg
= argv
[optind
];
668 corearg
= argv
[optind
];
672 "Excess command line arguments ignored. (%s%s)\n",
673 argv
[optind
], (optind
== argc
- 1) ? "" : " ...");
680 /* Run the init function of each source file */
682 initialize_cmd_lists (); /* This needs to be done first */
683 initialize_all_files ();
684 initialize_main (); /* But that omits this file! Do it now */
689 /* Print all the junk at the top, with trailing "..." if we are about
690 to read a symbol file (possibly slowly). */
691 print_gnu_advertisement ();
692 print_gdb_version ();
694 printf_filtered ("..");
696 fflush (stdout
); /* Force to screen during slow operations */
699 error_pre_print
= "\n\n";
700 /* We may get more than one warning, don't double space all of them... */
701 warning_pre_print
= "\nwarning: ";
703 /* We need a default language for parsing expressions, so simple things like
704 "set width 0" won't fail if no language is explicitly set in a config file
705 or implicitly set by reading an executable during startup. */
706 set_language (language_c
);
708 /* Read and execute $HOME/.gdbinit file, if it exists. This is done
709 *before* all the command line arguments are processed; it sets
710 global parameters, which are independent of what file you are
711 debugging or what directory you are in. */
712 homedir
= getenv ("HOME");
715 homeinit
= (char *) alloca (strlen (getenv ("HOME")) +
716 strlen (gdbinit
) + 10);
717 strcpy (homeinit
, getenv ("HOME"));
718 strcat (homeinit
, "/");
719 strcat (homeinit
, gdbinit
);
720 if (!inhibit_gdbinit
&& access (homeinit
, R_OK
) == 0)
722 if (!setjmp (to_top_level
))
723 source_command (homeinit
, 0);
725 do_cleanups (ALL_CLEANUPS
);
727 /* Do stats; no need to do them elsewhere since we'll only
728 need them if homedir is set. Make sure that they are
729 zero in case one of them fails (this guarantees that they
730 won't match if either exists). */
732 memset (&homebuf
, 0, sizeof (struct stat
));
733 memset (&cwdbuf
, 0, sizeof (struct stat
));
735 stat (homeinit
, &homebuf
);
736 stat (gdbinit
, &cwdbuf
); /* We'll only need this if
740 /* Now perform all the actions indicated by the arguments. */
743 if (!setjmp (to_top_level
))
745 cd_command (cdarg
, 0);
749 do_cleanups (ALL_CLEANUPS
);
751 for (i
= 0; i
< ndir
; i
++)
752 if (!setjmp (to_top_level
))
753 directory_command (dirarg
[i
], 0);
755 do_cleanups (ALL_CLEANUPS
);
759 && strcmp (execarg
, symarg
) == 0)
761 /* The exec file and the symbol-file are the same. If we can't open
762 it, better only print one error message. */
763 if (!setjmp (to_top_level
))
765 exec_file_command (execarg
, !batch
);
766 symbol_file_command (symarg
, 0);
772 if (!setjmp (to_top_level
))
773 exec_file_command (execarg
, !batch
);
775 if (!setjmp (to_top_level
))
776 symbol_file_command (symarg
, 0);
778 do_cleanups (ALL_CLEANUPS
);
780 /* After the symbol file has been read, print a newline to get us
781 beyond the copyright line... But errors should still set off
782 the error message with a (single) blank line. */
784 printf_filtered ("\n");
785 error_pre_print
= "\n";
786 warning_pre_print
= "\nwarning: ";
789 if (!setjmp (to_top_level
))
790 core_file_command (corearg
, !batch
);
791 else if (isdigit (corearg
[0]) && !setjmp (to_top_level
))
792 attach_command (corearg
, !batch
);
793 do_cleanups (ALL_CLEANUPS
);
796 if (!setjmp (to_top_level
))
797 tty_command (ttyarg
, !batch
);
798 do_cleanups (ALL_CLEANUPS
);
800 #ifdef ADDITIONAL_OPTION_HANDLER
801 ADDITIONAL_OPTION_HANDLER
;
804 /* Error messages should no longer be distinguished with extra output. */
806 warning_pre_print
= "warning: ";
808 /* Read the .gdbinit file in the current directory, *if* it isn't
809 the same as the $HOME/.gdbinit file (it should exist, also). */
812 || memcmp ((char *) &homebuf
, (char *) &cwdbuf
, sizeof (struct stat
)))
813 if (!inhibit_gdbinit
&& access (gdbinit
, R_OK
) == 0)
815 if (!setjmp (to_top_level
))
816 source_command (gdbinit
, 0);
818 do_cleanups (ALL_CLEANUPS
);
820 for (i
= 0; i
< ncmd
; i
++)
822 if (!setjmp (to_top_level
))
824 if (cmdarg
[i
][0] == '-' && cmdarg
[i
][1] == '\0')
825 read_command_file (stdin
);
827 source_command (cmdarg
[i
], !batch
);
828 do_cleanups (ALL_CLEANUPS
);
833 /* Read in the old history after all the command files have been read. */
834 initialize_history();
838 /* We have hit the end of the batch file. */
842 /* Do any host- or target-specific hacks. This is used for i960 targets
843 to force the user to set a nindy target and spec its parameters. */
845 #ifdef BEFORE_MAIN_LOOP_HOOK
846 BEFORE_MAIN_LOOP_HOOK
;
849 /* The command loop. */
853 if (!setjmp (to_top_level
))
855 do_cleanups (ALL_CLEANUPS
); /* Do complete cleanup */
857 quit_command ((char *)0, instream
== stdin
);
860 /* No exit -- exit is through quit_command. */
863 /* Execute the line P as a command.
864 Pass FROM_TTY as second argument to the defining function. */
867 execute_command (p
, from_tty
)
871 register struct cmd_list_element
*c
;
872 register struct command_line
*cmdlines
;
873 register enum language flang
;
874 static const struct language_defn
*saved_language
= 0;
875 static int warned
= 0;
879 /* This can happen when command_line_input hits end of file. */
883 while (*p
== ' ' || *p
== '\t') p
++;
888 c
= lookup_cmd (&p
, cmdlist
, "", 0, 1);
889 /* Pass null arg rather than an empty one. */
891 if (c
->class == class_user
)
893 struct cleanup
*old_chain
;
896 error ("User-defined commands cannot take arguments.");
897 cmdlines
= c
->user_commands
;
902 /* Set the instream to 0, indicating execution of a
903 user-defined function. */
904 old_chain
= make_cleanup (source_cleanup
, instream
);
905 instream
= (FILE *) 0;
908 execute_command (cmdlines
->line
, 0);
909 cmdlines
= cmdlines
->next
;
911 do_cleanups (old_chain
);
913 else if (c
->type
== set_cmd
|| c
->type
== show_cmd
)
914 do_setshow_command (arg
, from_tty
& caution
, c
);
915 else if (c
->function
.cfunc
== NO_FUNCTION
)
916 error ("That is not a command, just a help topic.");
918 (*c
->function
.cfunc
) (arg
, from_tty
& caution
);
921 /* Tell the user if the language has changed (except first time). */
922 if (current_language
!= saved_language
)
924 if (language_mode
== language_mode_auto
) {
926 language_info (1); /* Print what changed. */
928 saved_language
= current_language
;
932 /* Warn the user if the working language does not match the
933 language of the current frame. Only warn the user if we are
934 actually running the program, i.e. there is a stack. */
935 /* FIXME: This should be cacheing the frame and only running when
936 the frame changes. */
937 if (target_has_stack
)
939 flang
= get_frame_language ();
941 && flang
!= language_unknown
942 && flang
!= current_language
->la_language
)
944 printf_filtered ("%s\n", lang_frame_mismatch_warn
);
952 command_loop_marker (foo
)
957 /* Read commands from `instream' and execute them
958 until end of file or error reading instream. */
962 struct cleanup
*old_chain
;
964 int stdin_is_tty
= ISATTY (stdin
);
966 while (!feof (instream
))
968 if (window_hook
&& instream
== stdin
)
969 (*window_hook
) (instream
, prompt
);
972 if (instream
== stdin
&& stdin_is_tty
)
973 reinitialize_more_filter ();
974 old_chain
= make_cleanup (command_loop_marker
, 0);
975 command
= command_line_input (instream
== stdin
? prompt
: (char *) NULL
,
979 execute_command (command
, instream
== stdin
);
980 /* Do any commands attached to breakpoint we stopped at. */
981 bpstat_do_actions (&stop_bpstat
);
982 do_cleanups (old_chain
);
986 /* Commands call this if they do not want to be repeated by null lines. */
991 /* If we aren't reading from standard input, we are saving the last
992 thing read from stdin in line and don't want to delete it. Null lines
993 won't repeat here in any case. */
994 if (instream
== stdin
)
998 /* Read a line from the stream "instream" without command line editing.
1000 It prints PRROMPT once at the start.
1001 Action is compatible with "readline", e.g. space for the result is
1002 malloc'd and should be freed by the caller.
1004 A NULL return means end of file. */
1006 gdb_readline (prrompt
)
1011 int input_index
= 0;
1012 int result_size
= 80;
1016 /* Don't use a _filtered function here. It causes the assumed
1017 character position to be off, since the newline we read from
1018 the user is not accounted for. */
1019 fputs (prrompt
, stdout
);
1023 result
= (char *) xmalloc (result_size
);
1027 /* Read from stdin if we are executing a user defined command.
1028 This is the right thing for prompt_for_continue, at least. */
1029 c
= fgetc (instream
? instream
: stdin
);
1040 result
[input_index
++] = c
;
1041 while (input_index
>= result_size
)
1044 result
= (char *) xrealloc (result
, result_size
);
1048 result
[input_index
++] = '\0';
1052 /* Variables which control command line editing and history
1053 substitution. These variables are given default values at the end
1055 static int command_editing_p
;
1056 static int history_expansion_p
;
1057 static int write_history_p
;
1058 static int history_size
;
1059 static char *history_filename
;
1061 /* Variables which are necessary for fancy command line editing. */
1062 char *gdb_completer_word_break_characters
=
1063 " \t\n!@#$%^&*()+=|~`}{[]\"';:?/>.<,-";
1065 /* When completing on command names, we remove '-' from the list of
1066 word break characters, since we use it in command names. If the
1067 readline library sees one in any of the current completion strings,
1068 it thinks that the string needs to be quoted and automatically supplies
1070 char *gdb_completer_command_word_break_characters
=
1071 " \t\n!@#$%^&*()+=|~`}{[]\"';:?/>.<,";
1073 /* Characters that can be used to quote completion strings. Note that we
1074 can't include '"' because the gdb C parser treats such quoted sequences
1076 char *gdb_completer_quote_characters
=
1079 /* Functions that are used as part of the fancy command line editing. */
1081 /* This can be used for functions which don't want to complete on symbols
1082 but don't want to complete on anything else either. */
1085 noop_completer (text
)
1091 /* Generate symbol names one by one for the completer. Each time we are
1092 called return another potential completion to the caller.
1094 TEXT is what we expect the symbol to start with.
1096 MATCHES is the number of matches that have currently been collected from
1097 calling this completion function. When zero, then we need to initialize,
1098 otherwise the initialization has already taken place and we can just
1099 return the next potential completion string.
1101 Returns NULL if there are no more completions, else a pointer to a string
1102 which is a possible completion.
1104 RL_LINE_BUFFER is available to be looked at; it contains the entire text
1105 of the line. RL_POINT is the offset in that line of the cursor. You
1106 should pretend that the line ends at RL_POINT. */
1109 symbol_completion_function (text
, matches
)
1113 static char **list
= (char **)NULL
; /* Cache of completions */
1114 static int index
; /* Next cached completion */
1115 char *output
= NULL
;
1116 char *tmp_command
, *p
;
1117 struct cmd_list_element
*c
, *result_list
;
1118 extern char *rl_line_buffer
;
1119 extern int rl_point
;
1123 /* The caller is beginning to accumulate a new set of completions, so
1124 we need to find all of them now, and cache them for returning one at
1125 a time on future calls. */
1129 /* Free the storage used by LIST, but not by the strings inside.
1130 This is because rl_complete_internal () frees the strings. */
1136 /* Choose the default set of word break characters to break completions.
1137 If we later find out that we are doing completions on command strings
1138 (as opposed to strings supplied by the individual command completer
1139 functions, which can be any string) then we will switch to the
1140 special word break set for command strings, which leaves out the
1141 '-' character used in some commands. */
1143 rl_completer_word_break_characters
=
1144 gdb_completer_word_break_characters
;
1146 /* Decide whether to complete on a list of gdb commands or on symbols. */
1147 tmp_command
= (char *) alloca (rl_point
+ 1);
1150 strncpy (tmp_command
, rl_line_buffer
, rl_point
);
1151 tmp_command
[rl_point
] = '\0';
1155 /* An empty line we want to consider ambiguous; that is, it
1156 could be any command. */
1157 c
= (struct cmd_list_element
*) -1;
1162 c
= lookup_cmd_1 (&p
, cmdlist
, &result_list
, 1);
1165 /* Move p up to the next interesting thing. */
1166 while (*p
== ' ' || *p
== '\t')
1173 /* He's typed something unrecognizable. Sigh. */
1176 else if (c
== (struct cmd_list_element
*) -1)
1178 /* If we didn't recognize everything up to the thing that
1179 needs completing, and we don't know what command it is
1180 yet, we are in trouble. */
1182 if (p
+ strlen(text
) != tmp_command
+ rl_point
)
1184 /* This really should not produce an error. Better would
1185 be to pretend to hit RETURN here; this would produce a
1186 response like "Ambiguous command: foo, foobar, etc",
1187 and leave the line available for re-entry with ^P.
1188 Instead, this error blows away the user's typed input
1189 without any way to get it back. */
1190 error (" Unrecognized command.");
1193 /* He's typed something ambiguous. This is easier. */
1196 list
= complete_on_cmdlist (*result_list
->prefixlist
, text
);
1200 list
= complete_on_cmdlist (cmdlist
, text
);
1202 rl_completer_word_break_characters
=
1203 gdb_completer_command_word_break_characters
;
1207 /* If we've gotten this far, gdb has recognized a full
1208 command. There are several possibilities:
1210 1) We need to complete on the command.
1211 2) We need to complete on the possibilities coming after
1213 2) We need to complete the text of what comes after the
1218 /* Always (might be longer versions of thie command). */
1219 list
= complete_on_cmdlist (result_list
, text
);
1220 rl_completer_word_break_characters
=
1221 gdb_completer_command_word_break_characters
;
1223 else if (!*p
&& !*text
)
1227 list
= complete_on_cmdlist (*c
->prefixlist
, "");
1228 rl_completer_word_break_characters
=
1229 gdb_completer_command_word_break_characters
;
1233 list
= (*c
->completer
) ("");
1238 if (c
->prefixlist
&& !c
->allow_unknown
)
1240 /* Something like "info adsfkdj". But error() is not the
1241 proper response; just return no completions instead. */
1246 list
= (*c
->completer
) (text
);
1252 /* If we found a list of potential completions during initialization then
1253 dole them out one at a time. The vector of completions is NULL
1254 terminated, so after returning the last one, return NULL (and continue
1255 to do so) each time we are called after that, until a new list is
1260 output
= list
[index
];
1270 /* Skip over a possibly quoted word (as defined by the quote characters
1271 and word break characters the completer uses). Returns pointer to the
1272 location after the "word". */
1278 char quote_char
= '\0';
1281 for (scan
= str
; *scan
!= '\0'; scan
++)
1283 if (quote_char
!= '\0')
1285 /* Ignore everything until the matching close quote char */
1286 if (*scan
== quote_char
)
1288 /* Found matching close quote. */
1293 else if (strchr (gdb_completer_quote_characters
, *scan
))
1295 /* Found start of a quoted string. */
1298 else if (strchr (gdb_completer_word_break_characters
, *scan
))
1312 #if STOP_SIGNAL == SIGTSTP
1313 signal (SIGTSTP
, SIG_DFL
);
1315 kill (getpid (), SIGTSTP
);
1316 signal (SIGTSTP
, stop_sig
);
1318 signal (STOP_SIGNAL
, stop_sig
);
1320 printf ("%s", prompt
);
1323 /* Forget about any previous command -- null line now will do nothing. */
1326 #endif /* STOP_SIGNAL */
1328 /* Initialize signal handlers. */
1338 signal (SIGINT
, request_quit
);
1340 /* If we initialize SIGQUIT to SIG_IGN, then the SIG_IGN will get
1341 passed to the inferior, which we don't want. It would be
1342 possible to do a "signal (SIGQUIT, SIG_DFL)" after we fork, but
1343 on BSD4.3 systems using vfork, that can affect the
1344 GDB process as well as the inferior (the signal handling tables
1345 might be in memory, shared between the two). Since we establish
1346 a handler for SIGQUIT, when we call exec it will set the signal
1347 to SIG_DFL for us. */
1348 signal (SIGQUIT
, do_nothing
);
1349 if (signal (SIGHUP
, do_nothing
) != SIG_IGN
)
1350 signal (SIGHUP
, disconnect
);
1351 signal (SIGFPE
, float_handler
);
1353 #if defined(SIGWINCH) && defined(SIGWINCH_HANDLER)
1354 signal (SIGWINCH
, SIGWINCH_HANDLER
);
1358 /* Read one line from the command input stream `instream'
1359 into the local static buffer `linebuffer' (whose current length
1361 The buffer is made bigger as necessary.
1362 Returns the address of the start of the line.
1364 NULL is returned for end of file.
1366 *If* the instream == stdin & stdin is a terminal, the line read
1367 is copied into the file line saver (global var char *line,
1368 length linesize) so that it can be duplicated.
1370 This routine either uses fancy command line editing or
1371 simple input as the user has requested. */
1374 command_line_input (prrompt
, repeat
)
1378 static char *linebuffer
= 0;
1379 static unsigned linelength
= 0;
1383 char *local_prompt
= prrompt
;
1388 if (linebuffer
== 0)
1391 linebuffer
= (char *) xmalloc (linelength
);
1396 /* Control-C quits instantly if typed while in this loop
1397 since it should not wait until the user types a newline. */
1400 signal (STOP_SIGNAL
, stop_sig
);
1405 /* Reports are that some Sys V's don't flush stdout/err on reads
1406 from stdin, when stdin/out are sockets rather than ttys. So we
1407 have to do it ourselves, to make emacs-gdb and xxgdb work.
1408 On other machines, doing this once per input should be a cheap nop. */
1412 /* Don't use fancy stuff if not talking to stdin. */
1413 if (command_editing_p
&& instream
== stdin
1414 && ISATTY (instream
))
1415 rl
= readline (local_prompt
);
1417 rl
= gdb_readline (local_prompt
);
1419 if (!rl
|| rl
== (char *) EOF
)
1424 if (strlen(rl
) + 1 + (p
- linebuffer
) > linelength
)
1426 linelength
= strlen(rl
) + 1 + (p
- linebuffer
);
1427 nline
= (char *) xrealloc (linebuffer
, linelength
);
1428 p
+= nline
- linebuffer
;
1432 /* Copy line. Don't copy null at end. (Leaves line alone
1433 if this was just a newline) */
1437 free (rl
); /* Allocated in readline. */
1439 if (p
== linebuffer
|| *(p
- 1) != '\\')
1442 p
--; /* Put on top of '\'. */
1443 local_prompt
= (char *) 0;
1447 signal (SIGTSTP
, SIG_DFL
);
1454 /* Do history expansion if that is wished. */
1455 if (history_expansion_p
&& instream
== stdin
1456 && ISATTY (instream
))
1458 char *history_value
;
1461 *p
= '\0'; /* Insert null now. */
1462 expanded
= history_expand (linebuffer
, &history_value
);
1465 /* Print the changes. */
1466 printf ("%s\n", history_value
);
1468 /* If there was an error, call this function again. */
1471 free (history_value
);
1472 return command_line_input (prrompt
, repeat
);
1474 if (strlen (history_value
) > linelength
)
1476 linelength
= strlen (history_value
) + 1;
1477 linebuffer
= (char *) xrealloc (linebuffer
, linelength
);
1479 strcpy (linebuffer
, history_value
);
1480 p
= linebuffer
+ strlen(linebuffer
);
1481 free (history_value
);
1485 /* If we just got an empty line, and that is supposed
1486 to repeat the previous command, return the value in the
1490 if (p
== linebuffer
)
1493 while (*p1
== ' ' || *p1
== '\t')
1501 /* Add line to history if appropriate. */
1502 if (instream
== stdin
1503 && ISATTY (stdin
) && *linebuffer
)
1504 add_history (linebuffer
);
1506 /* Note: lines consisting soley of comments are added to the command
1507 history. This is useful when you type a command, and then
1508 realize you don't want to execute it quite yet. You can comment
1509 out the command and then later fetch it from the value history
1510 and remove the '#'. The kill ring is probably better, but some
1511 people are in the habit of commenting things out. */
1513 while ((c
= *p1
++) != '\0')
1516 while ((c
= *p1
++) != '"')
1518 /* Make sure an escaped '"' doesn't make us think the string
1526 while ((c
= *p1
++) != '\'')
1528 /* Make sure an escaped '\'' doesn't make us think the string
1537 /* Found a comment. */
1543 /* Save into global buffer if appropriate. */
1546 if (linelength
> linesize
)
1548 line
= xrealloc (line
, linelength
);
1549 linesize
= linelength
;
1551 strcpy (line
, linebuffer
);
1558 /* Read lines from the input stream
1559 and accumulate them in a chain of struct command_line's
1560 which is then returned. */
1562 struct command_line
*
1563 read_command_lines ()
1565 struct command_line
*first
= 0;
1566 register struct command_line
*next
, *tail
= 0;
1567 register char *p
, *p1
;
1568 struct cleanup
*old_chain
= 0;
1573 p
= command_line_input ((char *) NULL
, instream
== stdin
);
1575 /* Treat end of file like "end". */
1578 /* Remove leading and trailing blanks. */
1579 while (*p
== ' ' || *p
== '\t') p
++;
1580 p1
= p
+ strlen (p
);
1581 while (p1
!= p
&& (p1
[-1] == ' ' || p1
[-1] == '\t')) p1
--;
1583 /* Is this "end"? */
1584 if (p1
- p
== 3 && !strncmp (p
, "end", 3))
1587 /* No => add this line to the chain of command lines. */
1588 next
= (struct command_line
*) xmalloc (sizeof (struct command_line
));
1589 next
->line
= savestring (p
, p1
- p
);
1597 /* We just read the first line.
1598 From now on, arrange to throw away the lines we have
1599 if we quit or get an error while inside this function. */
1601 old_chain
= make_cleanup (free_command_lines
, &first
);
1608 /* Now we are about to return the chain to our caller,
1609 so freeing it becomes his responsibility. */
1611 discard_cleanups (old_chain
);
1615 /* Free a chain of struct command_line's. */
1618 free_command_lines (lptr
)
1619 struct command_line
**lptr
;
1621 register struct command_line
*l
= *lptr
;
1622 register struct command_line
*next
;
1633 /* Add an element to the list of info subcommands. */
1636 add_info (name
, fun
, doc
)
1638 void (*fun
) PARAMS ((char *, int));
1641 add_cmd (name
, no_class
, fun
, doc
, &infolist
);
1644 /* Add an alias to the list of info subcommands. */
1647 add_info_alias (name
, oldname
, abbrev_flag
)
1652 add_alias_cmd (name
, oldname
, 0, abbrev_flag
, &infolist
);
1655 /* The "info" command is defined as a prefix, with allow_unknown = 0.
1656 Therefore, its own definition is called only for "info" with no args. */
1660 info_command (arg
, from_tty
)
1664 printf ("\"info\" must be followed by the name of an info command.\n");
1665 help_list (infolist
, "info ", -1, stdout
);
1668 /* The "show" command with no arguments shows all the settings. */
1672 show_command (arg
, from_tty
)
1676 cmd_show_list (showlist
, from_tty
, "");
1679 /* Add an element to the list of commands. */
1682 add_com (name
, class, fun
, doc
)
1684 enum command_class
class;
1685 void (*fun
) PARAMS ((char *, int));
1688 add_cmd (name
, class, fun
, doc
, &cmdlist
);
1691 /* Add an alias or abbreviation command to the list of commands. */
1694 add_com_alias (name
, oldname
, class, abbrev_flag
)
1697 enum command_class
class;
1700 add_alias_cmd (name
, oldname
, class, abbrev_flag
, &cmdlist
);
1707 error ("Argument required (%s).", why
);
1712 help_command (command
, from_tty
)
1714 int from_tty
; /* Ignored */
1716 help_cmd (command
, stdout
);
1720 validate_comname (comname
)
1726 error_no_arg ("name of command to define");
1731 if (!isalnum(*p
) && *p
!= '-')
1732 error ("Junk in argument list: \"%s\"", p
);
1737 /* This is just a placeholder in the command data structures. */
1739 user_defined_command (ignore
, from_tty
)
1746 define_command (comname
, from_tty
)
1750 register struct command_line
*cmds
;
1751 register struct cmd_list_element
*c
, *newc
;
1752 char *tem
= comname
;
1754 validate_comname (comname
);
1756 /* Look it up, and verify that we got an exact match. */
1757 c
= lookup_cmd (&tem
, cmdlist
, "", -1, 1);
1758 if (c
&& 0 != strcmp (comname
, c
->name
))
1763 if (c
->class == class_user
|| c
->class == class_alias
)
1764 tem
= "Redefine command \"%s\"? ";
1766 tem
= "Really redefine built-in command \"%s\"? ";
1767 if (!query (tem
, c
->name
))
1768 error ("Command \"%s\" not redefined.", c
->name
);
1771 comname
= savestring (comname
, strlen (comname
));
1773 /* If the rest of the commands will be case insensetive, this one
1774 should behave in the same manner. */
1775 for (tem
= comname
; *tem
; tem
++)
1776 if (isupper(*tem
)) *tem
= tolower(*tem
);
1780 printf ("Type commands for definition of \"%s\".\n\
1781 End with a line saying just \"end\".\n", comname
);
1785 cmds
= read_command_lines ();
1787 if (c
&& c
->class == class_user
)
1788 free_command_lines (&c
->user_commands
);
1790 newc
= add_cmd (comname
, class_user
, user_defined_command
,
1791 (c
&& c
->class == class_user
)
1792 ? c
->doc
: savestring ("User-defined.", 13), &cmdlist
);
1793 newc
->user_commands
= cmds
;
1797 document_command (comname
, from_tty
)
1801 struct command_line
*doclines
;
1802 register struct cmd_list_element
*c
;
1803 char *tem
= comname
;
1805 validate_comname (comname
);
1807 c
= lookup_cmd (&tem
, cmdlist
, "", 0, 1);
1809 if (c
->class != class_user
)
1810 error ("Command \"%s\" is built-in.", comname
);
1813 printf ("Type documentation for \"%s\".\n\
1814 End with a line saying just \"end\".\n", comname
);
1816 doclines
= read_command_lines ();
1818 if (c
->doc
) free (c
->doc
);
1821 register struct command_line
*cl1
;
1822 register int len
= 0;
1824 for (cl1
= doclines
; cl1
; cl1
= cl1
->next
)
1825 len
+= strlen (cl1
->line
) + 1;
1827 c
->doc
= (char *) xmalloc (len
+ 1);
1830 for (cl1
= doclines
; cl1
; cl1
= cl1
->next
)
1832 strcat (c
->doc
, cl1
->line
);
1834 strcat (c
->doc
, "\n");
1838 free_command_lines (&doclines
);
1842 print_gnu_advertisement()
1845 GDB is free software and you are welcome to distribute copies of it\n\
1846 under certain conditions; type \"show copying\" to see the conditions.\n\
1847 There is absolutely no warranty for GDB; type \"show warranty\" for details.\n\
1852 print_gdb_version ()
1855 GDB %s, Copyright 1992 Free Software Foundation, Inc.",
1861 show_version (args
, from_tty
)
1866 print_gnu_advertisement ();
1867 print_gdb_version ();
1868 printf_filtered ("\n");
1872 /* xgdb calls this to reprint the usual GDB prompt. */
1877 printf ("%s", prompt
);
1882 quit_command (args
, from_tty
)
1886 if (inferior_pid
!= 0 && target_has_execution
)
1888 if (query ("The program is running. Quit anyway? "))
1891 target_detach (args
, from_tty
);
1896 error ("Not confirmed.");
1898 /* Save the history information if it is appropriate to do so. */
1899 if (write_history_p
&& history_filename
)
1900 write_history (history_filename
);
1904 /* Returns whether GDB is running on a terminal and whether the user
1905 desires that questions be asked of them on that terminal. */
1908 input_from_terminal_p ()
1910 return gdb_has_a_terminal
&& (instream
== stdin
) & caution
;
1915 pwd_command (args
, from_tty
)
1919 if (args
) error ("The \"pwd\" command does not take an argument: %s", args
);
1920 getcwd (dirbuf
, sizeof (dirbuf
));
1922 if (strcmp (dirbuf
, current_directory
))
1923 printf ("Working directory %s\n (canonically %s).\n",
1924 current_directory
, dirbuf
);
1926 printf ("Working directory %s.\n", current_directory
);
1930 cd_command (dir
, from_tty
)
1937 /* If the new directory is absolute, repeat is a no-op; if relative,
1938 repeat might be useful but is more likely to be a mistake. */
1942 error_no_arg ("new working directory");
1944 dir
= tilde_expand (dir
);
1945 make_cleanup (free
, dir
);
1947 if (chdir (dir
) < 0)
1948 perror_with_name (dir
);
1951 dir
= savestring (dir
, len
- (len
> 1 && dir
[len
-1] == '/'));
1953 current_directory
= dir
;
1956 current_directory
= concat (current_directory
, "/", dir
, NULL
);
1960 /* Now simplify any occurrences of `.' and `..' in the pathname. */
1968 for (p
= current_directory
; *p
;)
1970 if (!strncmp (p
, "/./", 2)
1971 && (p
[2] == 0 || p
[2] == '/'))
1973 else if (!strncmp (p
, "/..", 3)
1974 && (p
[3] == 0 || p
[3] == '/')
1975 && p
!= current_directory
)
1978 while (q
!= current_directory
&& q
[-1] != '/') q
--;
1979 if (q
!= current_directory
)
1989 forget_cached_source_info ();
1992 pwd_command ((char *) 0, 1);
1997 source_command (args
, from_tty
)
2002 struct cleanup
*cleanups
;
2006 /* Let source without arguments read .gdbinit. */
2009 file
= tilde_expand (file
);
2010 make_cleanup (free
, file
);
2012 stream
= fopen (file
, "r");
2014 perror_with_name (file
);
2016 cleanups
= make_cleanup (fclose
, stream
);
2018 read_command_file (stream
);
2020 do_cleanups (cleanups
);
2025 echo_command (text
, from_tty
)
2037 /* \ at end of argument is used after spaces
2038 so they won't be lost. */
2042 c
= parse_escape (&p
);
2044 printf_filtered ("%c", c
);
2047 printf_filtered ("%c", c
);
2050 /* Force this output to appear now. */
2056 /* Functions to manipulate command line editing control variables. */
2058 /* Number of commands to print in each call to show_commands. */
2059 #define Hist_print 10
2061 show_commands (args
, from_tty
)
2065 /* Index for history commands. Relative to history_base. */
2068 /* Number of the history entry which we are planning to display next.
2069 Relative to history_base. */
2072 /* The first command in the history which doesn't exist (i.e. one more
2073 than the number of the last command). Relative to history_base. */
2076 extern struct _hist_entry
*history_get
PARAMS ((int));
2077 extern int history_base
;
2079 /* Print out some of the commands from the command history. */
2080 /* First determine the length of the history list. */
2081 hist_len
= history_size
;
2082 for (offset
= 0; offset
< history_size
; offset
++)
2084 if (!history_get (history_base
+ offset
))
2093 if (args
[0] == '+' && args
[1] == '\0')
2094 /* "info editing +" should print from the stored position. */
2097 /* "info editing <exp>" should print around command number <exp>. */
2098 num
= (parse_and_eval_address (args
) - history_base
) - Hist_print
/ 2;
2100 /* "show commands" means print the last Hist_print commands. */
2103 num
= hist_len
- Hist_print
;
2109 /* If there are at least Hist_print commands, we want to display the last
2110 Hist_print rather than, say, the last 6. */
2111 if (hist_len
- num
< Hist_print
)
2113 num
= hist_len
- Hist_print
;
2118 for (offset
= num
; offset
< num
+ Hist_print
&& offset
< hist_len
; offset
++)
2120 printf_filtered ("%5d %s\n", history_base
+ offset
,
2121 (history_get (history_base
+ offset
))->line
);
2124 /* The next command we want to display is the next one that we haven't
2128 /* If the user repeats this command with return, it should do what
2129 "show commands +" does. This is unnecessary if arg is null,
2130 because "show commands +" is not useful after "show commands". */
2131 if (from_tty
&& args
)
2138 /* Called by do_setshow_command. */
2141 set_history_size_command (args
, from_tty
, c
)
2144 struct cmd_list_element
*c
;
2146 if (history_size
== UINT_MAX
)
2147 unstifle_history ();
2148 else if (history_size
>= 0)
2149 stifle_history (history_size
);
2152 history_size
= UINT_MAX
;
2153 error ("History size must be non-negative");
2159 set_history (args
, from_tty
)
2163 printf ("\"set history\" must be followed by the name of a history subcommand.\n");
2164 help_list (sethistlist
, "set history ", -1, stdout
);
2169 show_history (args
, from_tty
)
2173 cmd_show_list (showhistlist
, from_tty
, "");
2176 int info_verbose
= 0; /* Default verbose msgs off */
2178 /* Called by do_setshow_command. An elaborate joke. */
2181 set_verbose (args
, from_tty
, c
)
2184 struct cmd_list_element
*c
;
2186 char *cmdname
= "verbose";
2187 struct cmd_list_element
*showcmd
;
2189 showcmd
= lookup_cmd_1 (&cmdname
, showlist
, NULL
, 1);
2193 c
->doc
= "Set verbose printing of informational messages.";
2194 showcmd
->doc
= "Show verbose printing of informational messages.";
2198 c
->doc
= "Set verbosity.";
2199 showcmd
->doc
= "Show verbosity.";
2204 float_handler (signo
)
2207 /* This message is based on ANSI C, section 4.7. Note that integer
2208 divide by zero causes this, so "float" is a misnomer. */
2209 error ("Erroneous arithmetic operation.");
2212 /* Return whether we are running a batch file or from terminal. */
2216 return !(instream
== stdin
&& ISATTY (stdin
));
2221 initialize_cmd_lists ()
2228 enablebreaklist
= NULL
;
2233 showhistlist
= NULL
;
2234 unsethistlist
= NULL
;
2235 #if MAINTENANCE_CMDS
2236 maintenancelist
= NULL
;
2237 maintenanceinfolist
= NULL
;
2238 maintenanceprintlist
= NULL
;
2240 setprintlist
= NULL
;
2241 showprintlist
= NULL
;
2242 setchecklist
= NULL
;
2243 showchecklist
= NULL
;
2246 /* Init the history buffer. Note that we are called after the init file(s)
2247 * have been read so that the user can change the history file via his
2248 * .gdbinit file (for instance). The GDBHISTFILE environment variable
2249 * overrides all of this.
2253 initialize_history()
2257 tmpenv
= getenv ("HISTSIZE");
2259 history_size
= atoi (tmpenv
);
2260 else if (!history_size
)
2263 stifle_history (history_size
);
2265 tmpenv
= getenv ("GDBHISTFILE");
2267 history_filename
= savestring (tmpenv
, strlen(tmpenv
));
2268 else if (!history_filename
) {
2269 /* We include the current directory so that if the user changes
2270 directories the file written will be the same as the one
2272 history_filename
= concat (current_directory
, "/.gdb_history", NULL
);
2274 read_history (history_filename
);
2280 struct cmd_list_element
*c
;
2282 #ifdef DEFAULT_PROMPT
2283 prompt
= savestring (DEFAULT_PROMPT
, strlen(DEFAULT_PROMPT
));
2285 prompt
= savestring ("(gdb) ", 6);
2288 /* Set the important stuff up for command editing. */
2289 command_editing_p
= 1;
2290 history_expansion_p
= 0;
2291 write_history_p
= 0;
2293 /* Setup important stuff for command line editing. */
2294 rl_completion_entry_function
= (int (*)()) symbol_completion_function
;
2295 rl_completer_word_break_characters
= gdb_completer_word_break_characters
;
2296 rl_completer_quote_characters
= gdb_completer_quote_characters
;
2297 rl_readline_name
= "gdb";
2299 /* Define the classes of commands.
2300 They will appear in the help list in the reverse of this order. */
2302 add_cmd ("internals", class_maintenance
, NO_FUNCTION
,
2303 "Maintenance commands.\n\
2304 Some gdb commands are provided just for use by gdb maintainers.\n\
2305 These commands are subject to frequent change, and may not be as\n\
2306 well documented as user commands.",
2308 add_cmd ("obscure", class_obscure
, NO_FUNCTION
, "Obscure features.", &cmdlist
);
2309 add_cmd ("aliases", class_alias
, NO_FUNCTION
, "Aliases of other commands.", &cmdlist
);
2310 add_cmd ("user-defined", class_user
, NO_FUNCTION
, "User-defined commands.\n\
2311 The commands in this class are those defined by the user.\n\
2312 Use the \"define\" command to define a command.", &cmdlist
);
2313 add_cmd ("support", class_support
, NO_FUNCTION
, "Support facilities.", &cmdlist
);
2314 add_cmd ("status", class_info
, NO_FUNCTION
, "Status inquiries.", &cmdlist
);
2315 add_cmd ("files", class_files
, NO_FUNCTION
, "Specifying and examining files.", &cmdlist
);
2316 add_cmd ("breakpoints", class_breakpoint
, NO_FUNCTION
, "Making program stop at certain points.", &cmdlist
);
2317 add_cmd ("data", class_vars
, NO_FUNCTION
, "Examining data.", &cmdlist
);
2318 add_cmd ("stack", class_stack
, NO_FUNCTION
, "Examining the stack.\n\
2319 The stack is made up of stack frames. Gdb assigns numbers to stack frames\n\
2320 counting from zero for the innermost (currently executing) frame.\n\n\
2321 At any time gdb identifies one frame as the \"selected\" frame.\n\
2322 Variable lookups are done with respect to the selected frame.\n\
2323 When the program being debugged stops, gdb selects the innermost frame.\n\
2324 The commands below can be used to select other frames by number or address.",
2326 add_cmd ("running", class_run
, NO_FUNCTION
, "Running the program.", &cmdlist
);
2328 add_com ("pwd", class_files
, pwd_command
,
2329 "Print working directory. This is used for your program as well.");
2330 add_com ("cd", class_files
, cd_command
,
2331 "Set working directory to DIR for debugger and program being debugged.\n\
2332 The change does not take effect for the program being debugged\n\
2333 until the next time it is started.");
2336 (add_set_cmd ("prompt", class_support
, var_string
, (char *)&prompt
,
2341 add_com ("echo", class_support
, echo_command
,
2342 "Print a constant string. Give string as argument.\n\
2343 C escape sequences may be used in the argument.\n\
2344 No newline is added at the end of the argument;\n\
2345 use \"\\n\" if you want a newline to be printed.\n\
2346 Since leading and trailing whitespace are ignored in command arguments,\n\
2347 if you want to print some you must use \"\\\" before leading whitespace\n\
2348 to be printed or after trailing whitespace.");
2349 add_com ("document", class_support
, document_command
,
2350 "Document a user-defined command.\n\
2351 Give command name as argument. Give documentation on following lines.\n\
2352 End with a line of just \"end\".");
2353 add_com ("define", class_support
, define_command
,
2354 "Define a new command name. Command name is argument.\n\
2355 Definition appears on following lines, one command per line.\n\
2356 End with a line of just \"end\".\n\
2357 Use the \"document\" command to give documentation for the new command.\n\
2358 Commands defined in this way do not take arguments.");
2361 add_com ("source", class_support
, source_command
,
2362 "Read commands from a file named FILE.\n\
2363 Note that the file \"" GDBINIT_FILENAME
"\" is read automatically in this way\n\
2364 when gdb is started.");
2366 /* Punt file name, we can't help it easily. */
2367 add_com ("source", class_support
, source_command
,
2368 "Read commands from a file named FILE.\n\
2369 Note that the file \".gdbinit\" is read automatically in this way\n\
2370 when gdb is started.");
2373 add_com ("quit", class_support
, quit_command
, "Exit gdb.");
2374 add_com ("help", class_support
, help_command
, "Print list of commands.");
2375 add_com_alias ("q", "quit", class_support
, 1);
2376 add_com_alias ("h", "help", class_support
, 1);
2379 c
= add_set_cmd ("verbose", class_support
, var_boolean
, (char *)&info_verbose
,
2382 add_show_from_set (c
, &showlist
);
2383 c
->function
.sfunc
= set_verbose
;
2384 set_verbose (NULL
, 0, c
);
2387 (add_set_cmd ("editing", class_support
, var_boolean
, (char *)&command_editing_p
,
2388 "Set editing of command lines as they are typed.\n\
2389 Use \"on\" to enable to enable the editing, and \"off\" to disable it.\n\
2390 Without an argument, command line editing is enabled. To edit, use\n\
2391 EMACS-like or VI-like commands like control-P or ESC.", &setlist
),
2394 add_prefix_cmd ("history", class_support
, set_history
,
2395 "Generic command for setting command history parameters.",
2396 &sethistlist
, "set history ", 0, &setlist
);
2397 add_prefix_cmd ("history", class_support
, show_history
,
2398 "Generic command for showing command history parameters.",
2399 &showhistlist
, "show history ", 0, &showlist
);
2402 (add_set_cmd ("expansion", no_class
, var_boolean
, (char *)&history_expansion_p
,
2403 "Set history expansion on command input.\n\
2404 Without an argument, history expansion is enabled.", &sethistlist
),
2408 (add_set_cmd ("save", no_class
, var_boolean
, (char *)&write_history_p
,
2409 "Set saving of the history record on exit.\n\
2410 Use \"on\" to enable to enable the saving, and \"off\" to disable it.\n\
2411 Without an argument, saving is enabled.", &sethistlist
),
2414 c
= add_set_cmd ("size", no_class
, var_uinteger
, (char *)&history_size
,
2415 "Set the size of the command history, \n\
2416 ie. the number of previous commands to keep a record of.", &sethistlist
);
2417 add_show_from_set (c
, &showhistlist
);
2418 c
->function
.sfunc
= set_history_size_command
;
2421 (add_set_cmd ("filename", no_class
, var_filename
, (char *)&history_filename
,
2422 "Set the filename in which to record the command history\n\
2423 (the list of previous commands of which a record is kept).", &sethistlist
),
2427 (add_set_cmd ("confirm", class_support
, var_boolean
,
2429 "Set whether to confirm potentially dangerous operations.",
2433 add_prefix_cmd ("info", class_info
, info_command
,
2434 "Generic command for showing things about the program being debugged.",
2435 &infolist
, "info ", 0, &cmdlist
);
2436 add_com_alias ("i", "info", class_info
, 1);
2438 add_prefix_cmd ("show", class_info
, show_command
,
2439 "Generic command for showing things about the debugger.",
2440 &showlist
, "show ", 0, &cmdlist
);
2441 /* Another way to get at the same thing. */
2442 add_info ("set", show_command
, "Show all GDB settings.");
2444 add_cmd ("commands", no_class
, show_commands
,
2445 "Show the the history of commands you typed.\n\
2446 You can supply a command number to start with, or a `+' to start after\n\
2447 the previous command number shown.",
2450 add_cmd ("version", no_class
, show_version
,
2451 "Show what version of GDB this is.", &showlist
);