1 /* Top level stuff for GDB, the GNU debugger.
2 Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994
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"
33 #include "terminal.h" /* For job_control. */
38 /* readline include files */
42 /* readline defines this. */
45 #include <sys/types.h>
47 /* What is this for? X_OK? */
55 #include <sys/param.h>
59 /* Prototypes for local functions */
61 static char * line_completion_function
PARAMS ((char *, int, char *, int));
63 static char * readline_line_completion_function
PARAMS ((char *, int));
65 static void command_loop_marker
PARAMS ((int));
67 static void while_command
PARAMS ((char *, int));
69 static void if_command
PARAMS ((char *, int));
71 static enum command_control_type
72 execute_control_command
PARAMS ((struct command_line
*));
74 static struct command_line
*
75 build_command_line
PARAMS ((enum command_control_type
, char *));
77 static struct command_line
*
78 get_command_line
PARAMS ((enum command_control_type
, char *));
80 static void realloc_body_list
PARAMS ((struct command_line
*, int));
82 static enum misc_command_type read_next_line
PARAMS ((struct command_line
**));
84 static enum command_control_type
85 recurse_read_control_structure
PARAMS ((struct command_line
*));
87 static void init_main
PARAMS ((void));
89 static void init_cmd_lists
PARAMS ((void));
91 static void float_handler
PARAMS ((int));
93 static void init_signals
PARAMS ((void));
95 static void set_verbose
PARAMS ((char *, int, struct cmd_list_element
*));
97 #ifdef TARGET_BYTE_ORDER_SELECTABLE
99 static void set_endian
PARAMS ((char *, int));
101 static void set_endian_big
PARAMS ((char *, int));
103 static void set_endian_little
PARAMS ((char *, int));
105 static void set_endian_auto
PARAMS ((char *, int));
107 static void show_endian
PARAMS ((char *, int));
111 static void show_history
PARAMS ((char *, int));
113 static void set_history
PARAMS ((char *, int));
115 static void set_history_size_command
PARAMS ((char *, int,
116 struct cmd_list_element
*));
118 static void show_commands
PARAMS ((char *, int));
120 static void echo_command
PARAMS ((char *, int));
122 static void pwd_command
PARAMS ((char *, int));
124 static void show_version
PARAMS ((char *, int));
126 static void document_command
PARAMS ((char *, int));
128 static void define_command
PARAMS ((char *, int));
130 static void validate_comname
PARAMS ((char *));
132 static void help_command
PARAMS ((char *, int));
134 static void show_command
PARAMS ((char *, int));
136 static void info_command
PARAMS ((char *, int));
138 static void complete_command
PARAMS ((char *, int));
140 static void do_nothing
PARAMS ((int));
142 static int quit_cover
PARAMS ((char *));
144 static void disconnect
PARAMS ((int));
146 static void source_cleanup
PARAMS ((FILE *));
148 /* If this definition isn't overridden by the header files, assume
149 that isatty and fileno exist on this system. */
151 #define ISATTY(FP) (isatty (fileno (FP)))
154 /* Initialization file name for gdb. This is overridden in some configs. */
156 #ifndef GDBINIT_FILENAME
157 #define GDBINIT_FILENAME ".gdbinit"
159 char gdbinit
[] = GDBINIT_FILENAME
;
160 int inhibit_gdbinit
= 0;
162 /* Disable windows if non-zero */
164 int use_windows
= 0; /* Defaults to off for now */
166 /* Version number of GDB, as a string. */
168 extern char *version
;
170 /* Canonical host name as a string. */
172 extern char *host_name
;
174 /* Canonical target name as a string. */
176 extern char *target_name
;
178 extern char lang_frame_mismatch_warn
[]; /* language.c */
180 /* Flag for whether we want all the "from_tty" gubbish printed. */
182 int caution
= 1; /* Default is yes, sigh. */
185 * Define all cmd_list_element's
188 /* Chain containing all defined commands. */
190 struct cmd_list_element
*cmdlist
;
192 /* Chain containing all defined info subcommands. */
194 struct cmd_list_element
*infolist
;
196 /* Chain containing all defined enable subcommands. */
198 struct cmd_list_element
*enablelist
;
200 /* Chain containing all defined disable subcommands. */
202 struct cmd_list_element
*disablelist
;
204 /* Chain containing all defined delete subcommands. */
206 struct cmd_list_element
*deletelist
;
208 /* Chain containing all defined "enable breakpoint" subcommands. */
210 struct cmd_list_element
*enablebreaklist
;
212 /* Chain containing all defined set subcommands */
214 struct cmd_list_element
*setlist
;
216 /* Chain containing all defined unset subcommands */
218 struct cmd_list_element
*unsetlist
;
220 /* Chain containing all defined show subcommands. */
222 struct cmd_list_element
*showlist
;
224 #ifdef TARGET_BYTE_ORDER_SELECTABLE
225 /* Chain containing the \"set endian\" commands. */
227 struct cmd_list_element
*endianlist
;
230 /* Chain containing all defined \"set history\". */
232 struct cmd_list_element
*sethistlist
;
234 /* 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 /* Chain containing all defined maintenance subcommands. */
245 struct cmd_list_element
*maintenancelist
;
248 /* Chain containing all defined "maintenance info" subcommands. */
251 struct cmd_list_element
*maintenanceinfolist
;
254 /* Chain containing all defined "maintenance print" subcommands. */
257 struct cmd_list_element
*maintenanceprintlist
;
260 struct cmd_list_element
*setprintlist
;
262 struct cmd_list_element
*showprintlist
;
264 struct cmd_list_element
*setchecklist
;
266 struct cmd_list_element
*showchecklist
;
268 /* stdio stream that command input is being read from. Set to stdin normally.
269 Set by source_command to the file we are sourcing. Set to NULL if we are
270 executing a user-defined command. */
274 /* Current working directory. */
276 char *current_directory
;
278 /* The directory name is actually stored here (usually). */
279 char gdb_dirbuf
[1024];
281 /* Function to call before reading a command, if nonzero.
282 The function receives two args: an input stream,
283 and a prompt string. */
285 void (*window_hook
) PARAMS ((FILE *, char *));
290 /* gdb prints this when reading a command interactively */
293 /* Buffer used for reading command lines, and the size
294 allocated for it so far. */
299 /* Nonzero if the current command is modified by "server ". This
300 affects things like recording into the command history, comamnds
301 repeating on RETURN, etc. This is so a user interface (emacs, GUI,
302 whatever) can issue its own commands and also send along commands
303 from the user, and have the user not notice that the user interface
304 is issuing commands too. */
307 /* Baud rate specified for talking to serial target systems. Default
308 is left as -1, so targets can choose their own defaults. */
309 /* FIXME: This means that "show remotebaud" and gr_files_info can print -1
310 or (unsigned int)-1. This is a Bad User Interface. */
314 /* Non-zero tells remote* modules to output debugging info. */
316 int remote_debug
= 0;
318 /* Level of control structure. */
319 static int control_level
;
321 /* Signal to catch ^Z typed while reading a command: SIGTSTP or SIGCONT. */
325 #define STOP_SIGNAL SIGTSTP
326 static void stop_sig
PARAMS ((int));
330 /* Some System V have job control but not sigsetmask(). */
331 #if !defined (HAVE_SIGSETMASK)
333 #define HAVE_SIGSETMASK 1
335 #define HAVE_SIGSETMASK 0
339 #if 0 == (HAVE_SIGSETMASK)
340 #define sigsetmask(n)
343 /* Hooks for alternate command interfaces. */
345 /* Called after most modules have been initialized, but before taking users
348 void (*init_ui_hook
) PARAMS ((void));
350 /* Called instead of command_loop at top level. Can be invoked via
351 return_to_top_level. */
353 void (*command_loop_hook
) PARAMS ((void));
355 /* Called instead of fputs for all output. */
357 void (*fputs_unfiltered_hook
) PARAMS ((const char *linebuffer
));
359 /* Called from print_frame_info to list the line we stopped in. */
361 void (*print_frame_info_listing_hook
) PARAMS ((struct symtab
*s
, int line
,
362 int stopline
, int noerror
));
363 /* Replaces most of query. */
365 int (*query_hook
) PARAMS (());
367 /* Called from gdb_flush to flush output. */
369 void (*flush_hook
) PARAMS ((FILE *stream
));
371 /* Called as appropriate to notify the interface of the specified breakpoint
374 void (*create_breakpoint_hook
) PARAMS ((struct breakpoint
*bpt
));
375 void (*delete_breakpoint_hook
) PARAMS ((struct breakpoint
*bpt
));
376 void (*enable_breakpoint_hook
) PARAMS ((struct breakpoint
*bpt
));
377 void (*disable_breakpoint_hook
) PARAMS ((struct breakpoint
*bpt
));
379 /* Called during long calculations to allow GUI to repair window damage, and to
380 check for stop buttons, etc... */
382 void (*interactive_hook
) PARAMS ((void));
384 /* Called when going to wait for the target. Usually allows the GUI to run
385 while waiting for target events. */
387 int (*target_wait_hook
) PARAMS ((int pid
, struct target_waitstatus
*status
));
389 /* Used by UI as a wrapper around command execution. May do various things
390 like enabling/disabling buttons, etc... */
392 void (*call_command_hook
) PARAMS ((struct cmd_list_element
*c
, char *cmd
,
395 /* Where to go for return_to_top_level (RETURN_ERROR). */
396 jmp_buf error_return
;
397 /* Where to go for return_to_top_level (RETURN_QUIT). */
400 /* Return for reason REASON. This generally gets back to the command
401 loop, but can be caught via catch_errors. */
404 return_to_top_level (reason
)
405 enum return_reason reason
;
410 /* Perhaps it would be cleaner to do this via the cleanup chain (not sure
411 I can think of a reason why that is vital, though). */
412 bpstat_clear_actions(stop_bpstat
); /* Clear queued breakpoint commands */
414 disable_current_display ();
415 do_cleanups (ALL_CLEANUPS
);
417 if (annotation_level
> 1)
428 (NORETURN
void) longjmp
429 (reason
== RETURN_ERROR
? error_return
: quit_return
, 1);
432 /* Call FUNC with arg ARGS, catching any errors. If there is no
433 error, return the value returned by FUNC. If there is an error,
434 print ERRSTRING, print the specific error message, then return
437 Must not be called with immediate_quit in effect (bad things might
438 happen, say we got a signal in the middle of a memcpy to quit_return).
439 This is an OK restriction; with very few exceptions immediate_quit can
440 be replaced by judicious use of QUIT.
442 MASK specifies what to catch; it is normally set to
443 RETURN_MASK_ALL, if for no other reason than that the code which
444 calls catch_errors might not be set up to deal with a quit which
445 isn't caught. But if the code can deal with it, it generally
446 should be RETURN_MASK_ERROR, unless for some reason it is more
447 useful to abort only the portion of the operation inside the
448 catch_errors. Note that quit should return to the command line
449 fairly quickly, even if some further processing is being done. */
452 catch_errors (func
, args
, errstring
, mask
)
453 int (*func
) PARAMS ((char *));
462 struct cleanup
*saved_cleanup_chain
;
463 char *saved_error_pre_print
;
465 saved_cleanup_chain
= save_cleanups ();
466 saved_error_pre_print
= error_pre_print
;
468 if (mask
& RETURN_MASK_ERROR
)
469 memcpy ((char *)saved_error
, (char *)error_return
, sizeof (jmp_buf));
470 if (mask
& RETURN_MASK_QUIT
)
471 memcpy (saved_quit
, quit_return
, sizeof (jmp_buf));
472 error_pre_print
= errstring
;
474 if (setjmp (tmp_jmp
) == 0)
476 if (mask
& RETURN_MASK_ERROR
)
477 memcpy (error_return
, tmp_jmp
, sizeof (jmp_buf));
478 if (mask
& RETURN_MASK_QUIT
)
479 memcpy (quit_return
, tmp_jmp
, sizeof (jmp_buf));
480 val
= (*func
) (args
);
485 restore_cleanups (saved_cleanup_chain
);
487 error_pre_print
= saved_error_pre_print
;
488 if (mask
& RETURN_MASK_ERROR
)
489 memcpy (error_return
, saved_error
, sizeof (jmp_buf));
490 if (mask
& RETURN_MASK_QUIT
)
491 memcpy (quit_return
, saved_quit
, sizeof (jmp_buf));
495 /* Handler for SIGHUP. */
501 catch_errors (quit_cover
, NULL
,
502 "Could not kill the program being debugged", RETURN_MASK_ALL
);
503 signal (SIGHUP
, SIG_DFL
);
504 kill (getpid (), SIGHUP
);
507 /* Just a little helper function for disconnect(). */
513 caution
= 0; /* Throw caution to the wind -- we're exiting.
514 This prevents asking the user dumb questions. */
515 quit_command((char *)0, 0);
519 /* Line number we are currently in in a file which is being sourced. */
520 static int source_line_number
;
522 /* Name of the file we are sourcing. */
523 static char *source_file_name
;
525 /* Buffer containing the error_pre_print used by the source stuff.
527 static char *source_error
;
528 static int source_error_allocated
;
530 /* Something to glom on to the start of error_pre_print if source_file_name
532 static char *source_pre_error
;
534 /* Clean up on error during a "source" command (or execution of a
535 user-defined command). */
538 source_cleanup (stream
)
541 /* Restore the previous input stream. */
545 /* Read commands from STREAM. */
547 read_command_file (stream
)
550 struct cleanup
*cleanups
;
552 cleanups
= make_cleanup (source_cleanup
, instream
);
555 do_cleanups (cleanups
);
558 extern void init_proc ();
563 /* Run the init function of each source file */
565 getcwd (gdb_dirbuf
, sizeof (gdb_dirbuf
));
566 current_directory
= gdb_dirbuf
;
568 init_cmd_lists (); /* This needs to be done first */
569 initialize_targets (); /* Setup target_terminal macros for utils.c */
570 initialize_utils (); /* Make errors and warnings possible */
571 initialize_all_files ();
572 init_main (); /* But that omits this file! Do it now */
577 /* We need a default language for parsing expressions, so simple things like
578 "set width 0" won't fail if no language is explicitly set in a config file
579 or implicitly set by reading an executable during startup. */
580 set_language (language_c
);
581 expected_language
= current_language
; /* don't warn about the change. */
587 /* Allocate, initialize a new command line structure for one of the
588 control commands (if/while). */
590 static struct command_line
*
591 build_command_line (type
, args
)
592 enum command_control_type type
;
595 struct command_line
*cmd
;
597 cmd
= (struct command_line
*)xmalloc (sizeof (struct command_line
));
599 cmd
->control_type
= type
;
603 = (struct command_line
**)xmalloc (sizeof (struct command_line
*)
605 memset (cmd
->body_list
, 0, sizeof (struct command_line
*) * cmd
->body_count
);
606 cmd
->line
= savestring (args
, strlen (args
));
610 /* Build and return a new command structure for the control commands
611 such as "if" and "while". */
613 static struct command_line
*
614 get_command_line (type
, arg
)
615 enum command_control_type type
;
618 struct command_line
*cmd
;
619 struct cleanup
*old_chain
= NULL
;
621 /* Allocate and build a new command line structure. */
622 cmd
= build_command_line (type
, arg
);
624 old_chain
= make_cleanup (free_command_lines
, &cmd
);
626 /* Read in the body of this command. */
627 if (recurse_read_control_structure (cmd
) == invalid_control
)
629 warning ("error reading in control structure\n");
630 do_cleanups (old_chain
);
634 discard_cleanups (old_chain
);
638 /* Execute the command in CMD. */
640 static enum command_control_type
641 execute_control_command (cmd
)
642 struct command_line
*cmd
;
644 struct expression
*expr
;
645 struct command_line
*current
;
646 struct cleanup
*old_chain
= 0;
647 struct cleanup
*tmp_chain
;
650 enum command_control_type ret
;
652 switch (cmd
->control_type
)
655 /* A simple command, execute it and return. */
656 execute_command (cmd
->line
, 0);
657 return cmd
->control_type
;
659 case continue_control
:
661 /* Return for "continue", and "break" so we can either
662 continue the loop at the top, or break out. */
663 return cmd
->control_type
;
667 /* Parse the loop control expression for the while statement. */
668 expr
= parse_expression (cmd
->line
);
669 tmp_chain
= make_cleanup (free_current_contents
, &expr
);
671 old_chain
= tmp_chain
;
673 ret
= simple_control
;
676 /* Keep iterating so long as the expression is true. */
679 /* Evaluate the expression. */
680 val
= evaluate_expression (expr
);
682 /* If the value is false, then break out of the loop. */
683 if (!value_true (val
))
686 /* Execute the body of the while statement. */
687 current
= *cmd
->body_list
;
690 ret
= execute_control_command (current
);
692 /* If we got an error, or a "break" command, then stop
694 if (ret
== invalid_control
|| ret
== break_control
)
700 /* If we got a "continue" command, then restart the loop
702 if (ret
== continue_control
)
705 /* Get the next statement. */
706 current
= current
->next
;
710 /* Reset RET so that we don't recurse the break all the way down. */
711 if (ret
== break_control
)
712 ret
= simple_control
;
719 /* Parse the conditional for the if statement. */
720 expr
= parse_expression (cmd
->line
);
721 old_chain
= make_cleanup (free_current_contents
, &expr
);
724 ret
= simple_control
;
726 /* Evaluate the conditional. */
727 val
= evaluate_expression (expr
);
729 /* Choose which arm to take commands from based on the value of the
730 conditional expression. */
731 if (value_true (val
))
732 current
= *cmd
->body_list
;
733 else if (cmd
->body_count
== 2)
734 current
= *(cmd
->body_list
+ 1);
736 /* Execute commands in the given arm. */
739 ret
= execute_control_command (current
);
741 /* If we got an error, get out. */
742 if (ret
!= simple_control
)
745 /* Get the next statement in the body. */
746 current
= current
->next
;
752 warning ("Invalid control type in command structure.");
753 return invalid_control
;
757 do_cleanups (old_chain
);
762 /* "while" command support. Executes a body of statements while the
763 loop condition is nonzero. */
766 while_command (arg
, from_tty
)
770 struct command_line
*command
= NULL
;
773 command
= get_command_line (while_control
, arg
);
778 execute_control_command (command
);
779 free_command_lines (&command
);
782 /* "if" command support. Execute either the true or false arm depending
783 on the value of the if conditional. */
786 if_command (arg
, from_tty
)
790 struct command_line
*command
= NULL
;
793 command
= get_command_line (if_control
, arg
);
798 execute_control_command (command
);
799 free_command_lines (&command
);
803 execute_user_command (c
, args
)
804 struct cmd_list_element
*c
;
807 register struct command_line
*cmdlines
;
808 struct cleanup
*old_chain
;
809 enum command_control_type ret
;
812 error ("User-defined commands cannot take arguments.");
814 cmdlines
= c
->user_commands
;
819 /* Set the instream to 0, indicating execution of a
820 user-defined function. */
821 old_chain
= make_cleanup (source_cleanup
, instream
);
822 instream
= (FILE *) 0;
825 ret
= execute_control_command (cmdlines
);
826 if (ret
!= simple_control
&& ret
!= break_control
)
828 warning ("Error in control structure.\n");
831 cmdlines
= cmdlines
->next
;
833 do_cleanups (old_chain
);
836 /* Execute the line P as a command.
837 Pass FROM_TTY as second argument to the defining function. */
840 execute_command (p
, from_tty
)
844 register struct cmd_list_element
*c
;
845 register enum language flang
;
846 static int warned
= 0;
850 /* This can happen when command_line_input hits end of file. */
854 while (*p
== ' ' || *p
== '\t') p
++;
859 c
= lookup_cmd (&p
, cmdlist
, "", 0, 1);
860 /* Pass null arg rather than an empty one. */
863 /* If this command has been hooked, run the hook first. */
865 execute_user_command (c
->hook
, (char *)0);
867 if (c
->class == class_user
)
868 execute_user_command (c
, arg
);
869 else if (c
->type
== set_cmd
|| c
->type
== show_cmd
)
870 do_setshow_command (arg
, from_tty
& caution
, c
);
871 else if (c
->function
.cfunc
== NO_FUNCTION
)
872 error ("That is not a command, just a help topic.");
873 else if (call_command_hook
)
874 call_command_hook (c
, arg
, from_tty
& caution
);
876 (*c
->function
.cfunc
) (arg
, from_tty
& caution
);
879 /* Tell the user if the language has changed (except first time). */
880 if (current_language
!= expected_language
)
882 if (language_mode
== language_mode_auto
) {
883 language_info (1); /* Print what changed. */
888 /* Warn the user if the working language does not match the
889 language of the current frame. Only warn the user if we are
890 actually running the program, i.e. there is a stack. */
891 /* FIXME: This should be cacheing the frame and only running when
892 the frame changes. */
893 if (target_has_stack
)
895 flang
= get_frame_language ();
897 && flang
!= language_unknown
898 && flang
!= current_language
->la_language
)
900 printf_filtered ("%s\n", lang_frame_mismatch_warn
);
908 command_loop_marker (foo
)
913 /* Read commands from `instream' and execute them
914 until end of file or error reading instream. */
918 struct cleanup
*old_chain
;
920 int stdin_is_tty
= ISATTY (stdin
);
922 while (!feof (instream
))
924 if (window_hook
&& instream
== stdin
)
925 (*window_hook
) (instream
, prompt
);
928 if (instream
== stdin
&& stdin_is_tty
)
929 reinitialize_more_filter ();
930 old_chain
= make_cleanup (command_loop_marker
, 0);
931 command
= command_line_input (instream
== stdin
? prompt
: (char *) NULL
,
932 instream
== stdin
, "prompt");
935 execute_command (command
, instream
== stdin
);
936 /* Do any commands attached to breakpoint we stopped at. */
937 bpstat_do_actions (&stop_bpstat
);
938 do_cleanups (old_chain
);
942 /* Commands call this if they do not want to be repeated by null lines. */
950 /* If we aren't reading from standard input, we are saving the last
951 thing read from stdin in line and don't want to delete it. Null lines
952 won't repeat here in any case. */
953 if (instream
== stdin
)
957 /* Read a line from the stream "instream" without command line editing.
959 It prints PRROMPT once at the start.
960 Action is compatible with "readline", e.g. space for the result is
961 malloc'd and should be freed by the caller.
963 A NULL return means end of file. */
965 gdb_readline (prrompt
)
971 int result_size
= 80;
975 /* Don't use a _filtered function here. It causes the assumed
976 character position to be off, since the newline we read from
977 the user is not accounted for. */
978 fputs_unfiltered (prrompt
, gdb_stdout
);
979 /* start-sanitize-mpw */
981 /* Move to a new line so the entered line doesn't have a prompt
982 on the front of it. */
983 fputs_unfiltered ("\n", gdb_stdout
);
985 /* end-sanitize-mpw */
986 gdb_flush (gdb_stdout
);
989 result
= (char *) xmalloc (result_size
);
993 /* Read from stdin if we are executing a user defined command.
994 This is the right thing for prompt_for_continue, at least. */
995 c
= fgetc (instream
? instream
: stdin
);
1000 /* The last line does not end with a newline. Return it, and
1001 if we are called again fgetc will still return EOF and
1002 we'll return NULL then. */
1011 result
[input_index
++] = c
;
1012 while (input_index
>= result_size
)
1015 result
= (char *) xrealloc (result
, result_size
);
1019 result
[input_index
++] = '\0';
1023 /* Variables which control command line editing and history
1024 substitution. These variables are given default values at the end
1026 static int command_editing_p
;
1027 static int history_expansion_p
;
1028 static int write_history_p
;
1029 static int history_size
;
1030 static char *history_filename
;
1032 /* readline uses the word breaks for two things:
1033 (1) In figuring out where to point the TEXT parameter to the
1034 rl_completion_entry_function. Since we don't use TEXT for much,
1035 it doesn't matter a lot what the word breaks are for this purpose, but
1036 it does affect how much stuff M-? lists.
1037 (2) If one of the matches contains a word break character, readline
1038 will quote it. That's why we switch between
1039 gdb_completer_word_break_characters and
1040 gdb_completer_command_word_break_characters. I'm not sure when
1041 we need this behavior (perhaps for funky characters in C++ symbols?). */
1043 /* Variables which are necessary for fancy command line editing. */
1044 char *gdb_completer_word_break_characters
=
1045 " \t\n!@#$%^&*()+=|~`}{[]\"';:?/>.<,-";
1047 /* When completing on command names, we remove '-' from the list of
1048 word break characters, since we use it in command names. If the
1049 readline library sees one in any of the current completion strings,
1050 it thinks that the string needs to be quoted and automatically supplies
1052 char *gdb_completer_command_word_break_characters
=
1053 " \t\n!@#$%^&*()+=|~`}{[]\"';:?/>.<,";
1055 /* Characters that can be used to quote completion strings. Note that we
1056 can't include '"' because the gdb C parser treats such quoted sequences
1058 char *gdb_completer_quote_characters
=
1061 /* Functions that are used as part of the fancy command line editing. */
1063 /* This can be used for functions which don't want to complete on symbols
1064 but don't want to complete on anything else either. */
1067 noop_completer (text
, prefix
)
1074 /* Complete on filenames. */
1076 filename_completer (text
, word
)
1080 /* From readline. */
1081 extern char *filename_completion_function ();
1082 int subsequent_name
;
1084 int return_val_used
;
1085 int return_val_alloced
;
1087 return_val_used
= 0;
1088 /* Small for testing. */
1089 return_val_alloced
= 1;
1090 return_val
= (char **) xmalloc (return_val_alloced
* sizeof (char *));
1092 subsequent_name
= 0;
1096 p
= filename_completion_function (text
, subsequent_name
);
1097 if (return_val_used
>= return_val_alloced
)
1099 return_val_alloced
*= 2;
1101 (char **) xrealloc (return_val
,
1102 return_val_alloced
* sizeof (char *));
1106 return_val
[return_val_used
++] = p
;
1109 /* Like emacs, don't complete on old versions. Especially useful
1110 in the "source" command. */
1111 if (p
[strlen (p
) - 1] == '~')
1117 /* Return exactly p. */
1118 return_val
[return_val_used
++] = p
;
1119 else if (word
> text
)
1121 /* Return some portion of p. */
1122 q
= xmalloc (strlen (p
) + 5);
1123 strcpy (q
, p
+ (word
- text
));
1124 return_val
[return_val_used
++] = q
;
1129 /* Return some of TEXT plus p. */
1130 q
= xmalloc (strlen (p
) + (text
- word
) + 5);
1131 strncpy (q
, word
, text
- word
);
1132 q
[text
- word
] = '\0';
1134 return_val
[return_val_used
++] = q
;
1138 subsequent_name
= 1;
1141 /* There is no way to do this just long enough to affect quote inserting
1142 without also affecting the next completion. This should be fixed in
1144 /* Insure that readline does the right thing
1145 with respect to inserting quotes. */
1146 rl_completer_word_break_characters
= "";
1151 /* Here are some useful test cases for completion. FIXME: These should
1152 be put in the test suite. They should be tested with both M-? and TAB.
1154 "show output-" "radix"
1155 "show output" "-radix"
1156 "p" ambiguous (commands starting with p--path, print, printf, etc.)
1157 "p " ambiguous (all symbols)
1158 "info t foo" no completions
1159 "info t " no completions
1160 "info t" ambiguous ("info target", "info terminal", etc.)
1161 "info ajksdlfk" no completions
1162 "info ajksdlfk " no completions
1164 "info " ambiguous (all info commands)
1165 "p \"a" no completions (string constant)
1166 "p 'a" ambiguous (all symbols starting with a)
1167 "p b-a" ambiguous (all symbols starting with a)
1168 "p b-" ambiguous (all symbols)
1169 "file Make" "file" (word break hard to screw up here)
1170 "file ../gdb.stabs/we" "ird" (needs to not break word at slash)
1173 /* Generate completions one by one for the completer. Each time we are
1174 called return another potential completion to the caller.
1175 line_completion just completes on commands or passes the buck to the
1176 command's completer function, the stuff specific to symbol completion
1177 is in make_symbol_completion_list.
1179 TEXT is the caller's idea of the "word" we are looking at.
1181 MATCHES is the number of matches that have currently been collected from
1182 calling this completion function. When zero, then we need to initialize,
1183 otherwise the initialization has already taken place and we can just
1184 return the next potential completion string.
1186 LINE_BUFFER is available to be looked at; it contains the entire text
1187 of the line. POINT is the offset in that line of the cursor. You
1188 should pretend that the line ends at POINT.
1190 Returns NULL if there are no more completions, else a pointer to a string
1191 which is a possible completion, it is the caller's responsibility to
1195 line_completion_function (text
, matches
, line_buffer
, point
)
1201 static char **list
= (char **)NULL
; /* Cache of completions */
1202 static int index
; /* Next cached completion */
1203 char *output
= NULL
;
1204 char *tmp_command
, *p
;
1205 /* Pointer within tmp_command which corresponds to text. */
1207 struct cmd_list_element
*c
, *result_list
;
1211 /* The caller is beginning to accumulate a new set of completions, so
1212 we need to find all of them now, and cache them for returning one at
1213 a time on future calls. */
1217 /* Free the storage used by LIST, but not by the strings inside.
1218 This is because rl_complete_internal () frees the strings. */
1224 /* Choose the default set of word break characters to break completions.
1225 If we later find out that we are doing completions on command strings
1226 (as opposed to strings supplied by the individual command completer
1227 functions, which can be any string) then we will switch to the
1228 special word break set for command strings, which leaves out the
1229 '-' character used in some commands. */
1231 rl_completer_word_break_characters
=
1232 gdb_completer_word_break_characters
;
1234 /* Decide whether to complete on a list of gdb commands or on symbols. */
1235 tmp_command
= (char *) alloca (point
+ 1);
1238 strncpy (tmp_command
, line_buffer
, point
);
1239 tmp_command
[point
] = '\0';
1240 /* Since text always contains some number of characters leading up
1241 to point, we can find the equivalent position in tmp_command
1242 by subtracting that many characters from the end of tmp_command. */
1243 word
= tmp_command
+ point
- strlen (text
);
1247 /* An empty line we want to consider ambiguous; that is, it
1248 could be any command. */
1249 c
= (struct cmd_list_element
*) -1;
1254 c
= lookup_cmd_1 (&p
, cmdlist
, &result_list
, 1);
1257 /* Move p up to the next interesting thing. */
1258 while (*p
== ' ' || *p
== '\t')
1265 /* It is an unrecognized command. So there are no
1266 possible completions. */
1269 else if (c
== (struct cmd_list_element
*) -1)
1273 /* lookup_cmd_1 advances p up to the first ambiguous thing, but
1274 doesn't advance over that thing itself. Do so now. */
1276 while (*q
&& (isalnum (*q
) || *q
== '-' || *q
== '_'))
1278 if (q
!= tmp_command
+ point
)
1280 /* There is something beyond the ambiguous
1281 command, so there are no possible completions. For
1282 example, "info t " or "info t foo" does not complete
1283 to anything, because "info t" can be "info target" or
1289 /* We're trying to complete on the command which was ambiguous.
1290 This we can deal with. */
1293 list
= complete_on_cmdlist (*result_list
->prefixlist
, p
,
1298 list
= complete_on_cmdlist (cmdlist
, p
, word
);
1300 /* Insure that readline does the right thing with respect to
1301 inserting quotes. */
1302 rl_completer_word_break_characters
=
1303 gdb_completer_command_word_break_characters
;
1308 /* We've recognized a full command. */
1310 if (p
== tmp_command
+ point
)
1312 /* There is no non-whitespace in the line beyond the command. */
1314 if (p
[-1] == ' ' || p
[-1] == '\t')
1316 /* The command is followed by whitespace; we need to complete
1317 on whatever comes after command. */
1320 /* It is a prefix command; what comes after it is
1321 a subcommand (e.g. "info "). */
1322 list
= complete_on_cmdlist (*c
->prefixlist
, p
, word
);
1324 /* Insure that readline does the right thing
1325 with respect to inserting quotes. */
1326 rl_completer_word_break_characters
=
1327 gdb_completer_command_word_break_characters
;
1331 /* It is a normal command; what comes after it is
1332 completed by the command's completer function. */
1333 list
= (*c
->completer
) (p
, word
);
1338 /* The command is not followed by whitespace; we need to
1339 complete on the command itself. e.g. "p" which is a
1340 command itself but also can complete to "print", "ptype"
1344 /* Find the command we are completing on. */
1346 while (q
> tmp_command
)
1348 if (isalnum (q
[-1]) || q
[-1] == '-' || q
[-1] == '_')
1354 list
= complete_on_cmdlist (result_list
, q
, word
);
1356 /* Insure that readline does the right thing
1357 with respect to inserting quotes. */
1358 rl_completer_word_break_characters
=
1359 gdb_completer_command_word_break_characters
;
1364 /* There is non-whitespace beyond the command. */
1366 if (c
->prefixlist
&& !c
->allow_unknown
)
1368 /* It is an unrecognized subcommand of a prefix command,
1369 e.g. "info adsfkdj". */
1374 /* It is a normal command. */
1375 list
= (*c
->completer
) (p
, word
);
1381 /* If we found a list of potential completions during initialization then
1382 dole them out one at a time. The vector of completions is NULL
1383 terminated, so after returning the last one, return NULL (and continue
1384 to do so) each time we are called after that, until a new list is
1389 output
= list
[index
];
1397 /* Can't do this because readline hasn't yet checked the word breaks
1398 for figuring out whether to insert a quote. */
1400 /* Make sure the word break characters are set back to normal for the
1401 next time that readline tries to complete something. */
1402 rl_completer_word_break_characters
=
1403 gdb_completer_word_break_characters
;
1409 /* Line completion interface function for readline. */
1412 readline_line_completion_function (text
, matches
)
1416 return line_completion_function (text
, matches
, rl_line_buffer
, rl_point
);
1419 /* Skip over a possibly quoted word (as defined by the quote characters
1420 and word break characters the completer uses). Returns pointer to the
1421 location after the "word". */
1427 char quote_char
= '\0';
1430 for (scan
= str
; *scan
!= '\0'; scan
++)
1432 if (quote_char
!= '\0')
1434 /* Ignore everything until the matching close quote char */
1435 if (*scan
== quote_char
)
1437 /* Found matching close quote. */
1442 else if (strchr (gdb_completer_quote_characters
, *scan
))
1444 /* Found start of a quoted string. */
1447 else if (strchr (gdb_completer_word_break_characters
, *scan
))
1461 #if STOP_SIGNAL == SIGTSTP
1462 signal (SIGTSTP
, SIG_DFL
);
1464 kill (getpid (), SIGTSTP
);
1465 signal (SIGTSTP
, stop_sig
);
1467 signal (STOP_SIGNAL
, stop_sig
);
1469 printf_unfiltered ("%s", prompt
);
1470 gdb_flush (gdb_stdout
);
1472 /* Forget about any previous command -- null line now will do nothing. */
1475 #endif /* STOP_SIGNAL */
1477 /* Initialize signal handlers. */
1487 signal (SIGINT
, request_quit
);
1489 /* If we initialize SIGQUIT to SIG_IGN, then the SIG_IGN will get
1490 passed to the inferior, which we don't want. It would be
1491 possible to do a "signal (SIGQUIT, SIG_DFL)" after we fork, but
1492 on BSD4.3 systems using vfork, that can affect the
1493 GDB process as well as the inferior (the signal handling tables
1494 might be in memory, shared between the two). Since we establish
1495 a handler for SIGQUIT, when we call exec it will set the signal
1496 to SIG_DFL for us. */
1497 signal (SIGQUIT
, do_nothing
);
1498 if (signal (SIGHUP
, do_nothing
) != SIG_IGN
)
1499 signal (SIGHUP
, disconnect
);
1500 signal (SIGFPE
, float_handler
);
1502 #if defined(SIGWINCH) && defined(SIGWINCH_HANDLER)
1503 signal (SIGWINCH
, SIGWINCH_HANDLER
);
1507 /* Read one line from the command input stream `instream'
1508 into the local static buffer `linebuffer' (whose current length
1510 The buffer is made bigger as necessary.
1511 Returns the address of the start of the line.
1513 NULL is returned for end of file.
1515 *If* the instream == stdin & stdin is a terminal, the line read
1516 is copied into the file line saver (global var char *line,
1517 length linesize) so that it can be duplicated.
1519 This routine either uses fancy command line editing or
1520 simple input as the user has requested. */
1523 command_line_input (prrompt
, repeat
, annotation_suffix
)
1526 char *annotation_suffix
;
1528 static char *linebuffer
= 0;
1529 static unsigned linelength
= 0;
1533 char *local_prompt
= prrompt
;
1538 if (annotation_level
> 1 && instream
== stdin
)
1540 local_prompt
= alloca ((prrompt
== NULL
? 0 : strlen (prrompt
))
1541 + strlen (annotation_suffix
) + 40);
1542 if (prrompt
== NULL
)
1543 local_prompt
[0] = '\0';
1545 strcpy (local_prompt
, prrompt
);
1546 strcat (local_prompt
, "\n\032\032");
1547 strcat (local_prompt
, annotation_suffix
);
1548 strcat (local_prompt
, "\n");
1551 if (linebuffer
== 0)
1554 linebuffer
= (char *) xmalloc (linelength
);
1559 /* Control-C quits instantly if typed while in this loop
1560 since it should not wait until the user types a newline. */
1564 signal (STOP_SIGNAL
, stop_sig
);
1569 /* Make sure that all output has been output. Some machines may let
1570 you get away with leaving out some of the gdb_flush, but not all. */
1572 gdb_flush (gdb_stdout
);
1573 gdb_flush (gdb_stderr
);
1575 if (source_file_name
!= NULL
)
1577 ++source_line_number
;
1578 sprintf (source_error
,
1579 "%s%s:%d: Error in sourced command file:\n",
1582 source_line_number
);
1583 error_pre_print
= source_error
;
1586 if (annotation_level
> 1 && instream
== stdin
)
1588 printf_unfiltered ("\n\032\032pre-");
1589 printf_unfiltered (annotation_suffix
);
1590 printf_unfiltered ("\n");
1593 /* Don't use fancy stuff if not talking to stdin. */
1594 if (command_editing_p
&& instream
== stdin
1595 && ISATTY (instream
))
1596 rl
= readline (local_prompt
);
1598 rl
= gdb_readline (local_prompt
);
1600 if (annotation_level
> 1 && instream
== stdin
)
1602 printf_unfiltered ("\n\032\032post-");
1603 printf_unfiltered (annotation_suffix
);
1604 printf_unfiltered ("\n");
1607 if (!rl
|| rl
== (char *) EOF
)
1612 if (strlen(rl
) + 1 + (p
- linebuffer
) > linelength
)
1614 linelength
= strlen(rl
) + 1 + (p
- linebuffer
);
1615 nline
= (char *) xrealloc (linebuffer
, linelength
);
1616 p
+= nline
- linebuffer
;
1620 /* Copy line. Don't copy null at end. (Leaves line alone
1621 if this was just a newline) */
1625 free (rl
); /* Allocated in readline. */
1627 if (p
== linebuffer
|| *(p
- 1) != '\\')
1630 p
--; /* Put on top of '\'. */
1631 local_prompt
= (char *) 0;
1636 signal (STOP_SIGNAL
, SIG_DFL
);
1643 #define SERVER_COMMAND_LENGTH 7
1645 (p
- linebuffer
> SERVER_COMMAND_LENGTH
)
1646 && STREQN (linebuffer
, "server ", SERVER_COMMAND_LENGTH
);
1649 /* Note that we don't set `line'. Between this and the check in
1650 dont_repeat, this insures that repeating will still do the
1653 return linebuffer
+ SERVER_COMMAND_LENGTH
;
1656 /* Do history expansion if that is wished. */
1657 if (history_expansion_p
&& instream
== stdin
1658 && ISATTY (instream
))
1660 char *history_value
;
1663 *p
= '\0'; /* Insert null now. */
1664 expanded
= history_expand (linebuffer
, &history_value
);
1667 /* Print the changes. */
1668 printf_unfiltered ("%s\n", history_value
);
1670 /* If there was an error, call this function again. */
1673 free (history_value
);
1674 return command_line_input (prrompt
, repeat
, annotation_suffix
);
1676 if (strlen (history_value
) > linelength
)
1678 linelength
= strlen (history_value
) + 1;
1679 linebuffer
= (char *) xrealloc (linebuffer
, linelength
);
1681 strcpy (linebuffer
, history_value
);
1682 p
= linebuffer
+ strlen(linebuffer
);
1683 free (history_value
);
1687 /* If we just got an empty line, and that is supposed
1688 to repeat the previous command, return the value in the
1692 if (p
== linebuffer
)
1695 while (*p1
== ' ' || *p1
== '\t')
1703 /* Add line to history if appropriate. */
1704 if (instream
== stdin
1705 && ISATTY (stdin
) && *linebuffer
)
1706 add_history (linebuffer
);
1708 /* Note: lines consisting solely of comments are added to the command
1709 history. This is useful when you type a command, and then
1710 realize you don't want to execute it quite yet. You can comment
1711 out the command and then later fetch it from the value history
1712 and remove the '#'. The kill ring is probably better, but some
1713 people are in the habit of commenting things out. */
1715 while ((c
= *p1
++) != '\0')
1718 while ((c
= *p1
++) != '"')
1720 /* Make sure an escaped '"' doesn't make us think the string
1728 while ((c
= *p1
++) != '\'')
1730 /* Make sure an escaped '\'' doesn't make us think the string
1739 /* Found a comment. */
1745 /* Save into global buffer if appropriate. */
1748 if (linelength
> linesize
)
1750 line
= xrealloc (line
, linelength
);
1751 linesize
= linelength
;
1753 strcpy (line
, linebuffer
);
1761 /* Expand the body_list of COMMAND so that it can hold NEW_LENGTH
1762 code bodies. This is typically used when we encounter an "else"
1763 clause for an "if" command. */
1766 realloc_body_list (command
, new_length
)
1767 struct command_line
*command
;
1771 struct command_line
**body_list
;
1773 n
= command
->body_count
;
1775 /* Nothing to do? */
1776 if (new_length
<= n
)
1779 body_list
= (struct command_line
**)
1780 xmalloc (sizeof (struct command_line
*) * new_length
);
1782 memcpy (body_list
, command
->body_list
, sizeof (struct command_line
*) * n
);
1784 free (command
->body_list
);
1785 command
->body_list
= body_list
;
1786 command
->body_count
= new_length
;
1789 /* Read one line from the input stream. If the command is an "else" or
1790 "end", return such an indication to the caller. */
1792 static enum misc_command_type
1793 read_next_line (command
)
1794 struct command_line
**command
;
1796 char *p
, *p1
, *prompt_ptr
, control_prompt
[256];
1799 if (control_level
>= 254)
1800 error ("Control nesting too deep!\n");
1802 /* Set a prompt based on the nesting of the control commands. */
1803 if (instream
== stdin
)
1805 for (i
= 0; i
< control_level
; i
++)
1806 control_prompt
[i
] = ' ';
1807 control_prompt
[i
] = '>';
1808 control_prompt
[i
+1] = '\0';
1809 prompt_ptr
= (char *)&control_prompt
[0];
1814 p
= command_line_input (prompt_ptr
, instream
== stdin
, NULL
);
1816 /* Not sure what to do here. */
1820 /* Strip leading and trailing whitespace. */
1821 while (*p
== ' ' || *p
== '\t')
1824 p1
= p
+ strlen (p
);
1825 while (p1
!= p
&& (p1
[-1] == ' ' || p1
[-1] == '\t'))
1828 /* Blanks and comments don't really do anything, but we need to
1829 distinguish them from else, end and other commands which can be
1831 if (p1
== p
|| p
[0] == '#')
1834 /* Is this the end of a simple, while, or if control structure? */
1835 if (p1
- p
== 3 && !strncmp (p
, "end", 3))
1838 /* Is the else clause of an if control structure? */
1839 if (p1
- p
== 4 && !strncmp (p
, "else", 4))
1840 return else_command
;
1842 /* Check for while, if, break, continue, etc and build a new command
1843 line structure for them. */
1844 if (p1
- p
> 5 && !strncmp (p
, "while", 5))
1845 *command
= build_command_line (while_control
, p
+ 6);
1846 else if (p1
- p
> 2 && !strncmp (p
, "if", 2))
1847 *command
= build_command_line (if_control
, p
+ 3);
1848 else if (p1
- p
== 5 && !strncmp (p
, "loop_break", 5))
1850 *command
= (struct command_line
*)
1851 xmalloc (sizeof (struct command_line
));
1852 (*command
)->next
= NULL
;
1853 (*command
)->line
= NULL
;
1854 (*command
)->control_type
= break_control
;
1855 (*command
)->body_count
= 0;
1856 (*command
)->body_list
= NULL
;
1858 else if (p1
- p
== 8 && !strncmp (p
, "loop_continue", 8))
1860 *command
= (struct command_line
*)
1861 xmalloc (sizeof (struct command_line
));
1862 (*command
)->next
= NULL
;
1863 (*command
)->line
= NULL
;
1864 (*command
)->control_type
= continue_control
;
1865 (*command
)->body_count
= 0;
1866 (*command
)->body_list
= NULL
;
1870 /* A normal command. */
1871 *command
= (struct command_line
*)
1872 xmalloc (sizeof (struct command_line
));
1873 (*command
)->next
= NULL
;
1874 (*command
)->line
= savestring (p
, p1
- p
);
1875 (*command
)->control_type
= simple_control
;
1876 (*command
)->body_count
= 0;
1877 (*command
)->body_list
= NULL
;
1880 /* Nothing special. */
1884 /* Recursively read in the control structures and create a command_line
1887 The parent_control parameter is the control structure in which the
1888 following commands are nested. */
1890 static enum command_control_type
1891 recurse_read_control_structure (current_cmd
)
1892 struct command_line
*current_cmd
;
1894 int current_body
, i
;
1895 enum misc_command_type val
;
1896 enum command_control_type ret
;
1897 struct command_line
**body_ptr
, *child_tail
, *next
;
1898 struct cleanup
*old_chains
, *tmp_chains
;
1904 /* Sanity checks. */
1905 if (current_cmd
->control_type
== simple_control
)
1907 error ("Recursed on a simple control type\n");
1908 return invalid_control
;
1911 if (current_body
> current_cmd
->body_count
)
1913 error ("Allocated body is smaller than this command type needs\n");
1914 return invalid_control
;
1917 /* Read lines from the input stream and build control structures. */
1923 val
= read_next_line (&next
);
1925 /* Just skip blanks and comments. */
1926 if (val
== nop_command
)
1929 if (val
== end_command
)
1931 if (current_cmd
->control_type
== while_control
1932 || current_cmd
->control_type
== if_control
)
1934 /* Success reading an entire control structure. */
1935 ret
= simple_control
;
1940 ret
= invalid_control
;
1945 /* Not the end of a control structure. */
1946 if (val
== else_command
)
1948 if (current_cmd
->control_type
== if_control
1949 && current_body
== 1)
1951 realloc_body_list (current_cmd
, 2);
1958 ret
= invalid_control
;
1965 child_tail
->next
= next
;
1969 /* We have just read the first line of the child's control
1970 structure. From now on, arrange to throw away the line
1971 we have if we quit or get an error. */
1972 body_ptr
= current_cmd
->body_list
;
1973 for (i
= 1; i
< current_body
; i
++)
1978 tmp_chains
= make_cleanup (free_command_lines
, body_ptr
);
1981 old_chains
= tmp_chains
;
1986 /* If the latest line is another control structure, then recurse
1988 if (next
->control_type
== while_control
1989 || next
->control_type
== if_control
)
1992 ret
= recurse_read_control_structure (next
);
1995 if (ret
!= simple_control
)
2001 if (ret
== invalid_control
&& old_chains
)
2002 do_cleanups (old_chains
);
2003 else if (old_chains
)
2004 discard_cleanups (old_chains
);
2010 /* Read lines from the input stream
2011 and accumulate them in a chain of struct command_line's
2012 which is then returned. */
2014 struct command_line
*
2015 read_command_lines ()
2017 struct command_line
*head
, *tail
, *next
;
2018 struct cleanup
*old_chain
;
2019 enum command_control_type ret
;
2020 enum misc_command_type val
;
2027 val
= read_next_line (&next
);
2029 /* Ignore blank lines or comments. */
2030 if (val
== nop_command
)
2033 if (val
== end_command
)
2035 ret
= simple_control
;
2039 if (val
!= ok_command
)
2041 ret
= invalid_control
;
2045 if (next
->control_type
== while_control
2046 || next
->control_type
== if_control
)
2049 ret
= recurse_read_control_structure (next
);
2052 if (ret
== invalid_control
)
2063 old_chain
= make_cleanup (free_command_lines
, &head
);
2072 if (ret
!= invalid_control
)
2074 discard_cleanups (old_chain
);
2078 do_cleanups (old_chain
);
2084 /* Free a chain of struct command_line's. */
2087 free_command_lines (lptr
)
2088 struct command_line
**lptr
;
2090 register struct command_line
*l
= *lptr
;
2091 register struct command_line
*next
;
2092 struct command_line
**blist
;
2097 if (l
->body_count
> 0)
2099 blist
= l
->body_list
;
2100 for (i
= 0; i
< l
->body_count
; i
++, blist
++)
2101 free_command_lines (blist
);
2110 /* Add an element to the list of info subcommands. */
2113 add_info (name
, fun
, doc
)
2115 void (*fun
) PARAMS ((char *, int));
2118 add_cmd (name
, no_class
, fun
, doc
, &infolist
);
2121 /* Add an alias to the list of info subcommands. */
2124 add_info_alias (name
, oldname
, abbrev_flag
)
2129 add_alias_cmd (name
, oldname
, 0, abbrev_flag
, &infolist
);
2132 /* The "info" command is defined as a prefix, with allow_unknown = 0.
2133 Therefore, its own definition is called only for "info" with no args. */
2137 info_command (arg
, from_tty
)
2141 printf_unfiltered ("\"info\" must be followed by the name of an info command.\n");
2142 help_list (infolist
, "info ", -1, gdb_stdout
);
2145 /* The "complete" command is used by Emacs to implement completion. */
2149 complete_command (arg
, from_tty
)
2161 argpoint
= strlen (arg
);
2163 for (completion
= line_completion_function (arg
, i
= 0, arg
, argpoint
);
2165 completion
= line_completion_function (arg
, ++i
, arg
, argpoint
))
2167 printf_unfiltered ("%s\n", completion
);
2172 /* The "show" command with no arguments shows all the settings. */
2176 show_command (arg
, from_tty
)
2180 cmd_show_list (showlist
, from_tty
, "");
2183 /* Add an element to the list of commands. */
2186 add_com (name
, class, fun
, doc
)
2188 enum command_class
class;
2189 void (*fun
) PARAMS ((char *, int));
2192 add_cmd (name
, class, fun
, doc
, &cmdlist
);
2195 /* Add an alias or abbreviation command to the list of commands. */
2198 add_com_alias (name
, oldname
, class, abbrev_flag
)
2201 enum command_class
class;
2204 add_alias_cmd (name
, oldname
, class, abbrev_flag
, &cmdlist
);
2211 error ("Argument required (%s).", why
);
2216 help_command (command
, from_tty
)
2218 int from_tty
; /* Ignored */
2220 help_cmd (command
, gdb_stdout
);
2224 validate_comname (comname
)
2230 error_no_arg ("name of command to define");
2235 if (!isalnum(*p
) && *p
!= '-')
2236 error ("Junk in argument list: \"%s\"", p
);
2241 /* This is just a placeholder in the command data structures. */
2243 user_defined_command (ignore
, from_tty
)
2250 define_command (comname
, from_tty
)
2254 register struct command_line
*cmds
;
2255 register struct cmd_list_element
*c
, *newc
, *hookc
= 0;
2256 char *tem
= comname
;
2257 #define HOOK_STRING "hook-"
2260 validate_comname (comname
);
2262 /* Look it up, and verify that we got an exact match. */
2263 c
= lookup_cmd (&tem
, cmdlist
, "", -1, 1);
2264 if (c
&& !STREQ (comname
, c
->name
))
2269 if (c
->class == class_user
|| c
->class == class_alias
)
2270 tem
= "Redefine command \"%s\"? ";
2272 tem
= "Really redefine built-in command \"%s\"? ";
2273 if (!query (tem
, c
->name
))
2274 error ("Command \"%s\" not redefined.", c
->name
);
2277 /* If this new command is a hook, then mark the command which it
2278 is hooking. Note that we allow hooking `help' commands, so that
2279 we can hook the `stop' pseudo-command. */
2281 if (!strncmp (comname
, HOOK_STRING
, HOOK_LEN
))
2283 /* Look up cmd it hooks, and verify that we got an exact match. */
2284 tem
= comname
+HOOK_LEN
;
2285 hookc
= lookup_cmd (&tem
, cmdlist
, "", -1, 0);
2286 if (hookc
&& !STREQ (comname
+HOOK_LEN
, hookc
->name
))
2290 warning ("Your new `%s' command does not hook any existing command.",
2292 if (!query ("Proceed? ", (char *)0))
2293 error ("Not confirmed.");
2297 comname
= savestring (comname
, strlen (comname
));
2299 /* If the rest of the commands will be case insensitive, this one
2300 should behave in the same manner. */
2301 for (tem
= comname
; *tem
; tem
++)
2302 if (isupper(*tem
)) *tem
= tolower(*tem
);
2306 printf_unfiltered ("Type commands for definition of \"%s\".\n\
2307 End with a line saying just \"end\".\n", comname
);
2308 gdb_flush (gdb_stdout
);
2312 cmds
= read_command_lines ();
2314 if (c
&& c
->class == class_user
)
2315 free_command_lines (&c
->user_commands
);
2317 newc
= add_cmd (comname
, class_user
, user_defined_command
,
2318 (c
&& c
->class == class_user
)
2319 ? c
->doc
: savestring ("User-defined.", 13), &cmdlist
);
2320 newc
->user_commands
= cmds
;
2322 /* If this new command is a hook, then mark both commands as being
2326 hookc
->hook
= newc
; /* Target gets hooked. */
2327 newc
->hookee
= hookc
; /* We are marked as hooking target cmd. */
2332 document_command (comname
, from_tty
)
2336 struct command_line
*doclines
;
2337 register struct cmd_list_element
*c
;
2338 char *tem
= comname
;
2340 validate_comname (comname
);
2342 c
= lookup_cmd (&tem
, cmdlist
, "", 0, 1);
2344 if (c
->class != class_user
)
2345 error ("Command \"%s\" is built-in.", comname
);
2348 printf_unfiltered ("Type documentation for \"%s\".\n\
2349 End with a line saying just \"end\".\n", comname
);
2351 doclines
= read_command_lines ();
2353 if (c
->doc
) free (c
->doc
);
2356 register struct command_line
*cl1
;
2357 register int len
= 0;
2359 for (cl1
= doclines
; cl1
; cl1
= cl1
->next
)
2360 len
+= strlen (cl1
->line
) + 1;
2362 c
->doc
= (char *) xmalloc (len
+ 1);
2365 for (cl1
= doclines
; cl1
; cl1
= cl1
->next
)
2367 strcat (c
->doc
, cl1
->line
);
2369 strcat (c
->doc
, "\n");
2373 free_command_lines (&doclines
);
2377 print_gnu_advertisement ()
2379 printf_unfiltered ("\
2380 GDB is free software and you are welcome to distribute copies of it\n\
2381 under certain conditions; type \"show copying\" to see the conditions.\n\
2382 There is absolutely no warranty for GDB; type \"show warranty\" for details.\n\
2387 print_gdb_version (stream
)
2390 fprintf_filtered (stream
, "\
2391 GDB %s (%s", version
, host_name
);
2393 if (!STREQ (host_name
, target_name
))
2394 fprintf_filtered (stream
, " --target %s", target_name
);
2396 fprintf_filtered (stream
, "), ");
2398 fprintf_filtered (stream
, "Copyright 1994 Free Software Foundation, Inc.");
2403 show_version (args
, from_tty
)
2408 print_gnu_advertisement ();
2409 print_gdb_version (gdb_stdout
);
2410 printf_filtered ("\n");
2414 /* xgdb calls this to reprint the usual GDB prompt. Obsolete now that xgdb
2420 printf_unfiltered ("%s", prompt
);
2421 gdb_flush (gdb_stdout
);
2425 quit_command (args
, from_tty
)
2429 if (inferior_pid
!= 0 && target_has_execution
)
2433 if (query ("The program is running. Quit anyway (and detach it)? "))
2434 target_detach (args
, from_tty
);
2436 error ("Not confirmed.");
2440 if (query ("The program is running. Quit anyway (and kill it)? "))
2443 error ("Not confirmed.");
2446 /* UDI wants this, to kill the TIP. */
2449 /* Save the history information if it is appropriate to do so. */
2450 if (write_history_p
&& history_filename
)
2451 write_history (history_filename
);
2456 /* Returns whether GDB is running on a terminal and whether the user
2457 desires that questions be asked of them on that terminal. */
2460 input_from_terminal_p ()
2462 return gdb_has_a_terminal () && (instream
== stdin
) & caution
;
2467 pwd_command (args
, from_tty
)
2471 if (args
) error ("The \"pwd\" command does not take an argument: %s", args
);
2472 getcwd (gdb_dirbuf
, sizeof (gdb_dirbuf
));
2474 if (!STREQ (gdb_dirbuf
, current_directory
))
2475 printf_unfiltered ("Working directory %s\n (canonically %s).\n",
2476 current_directory
, gdb_dirbuf
);
2478 printf_unfiltered ("Working directory %s.\n", current_directory
);
2482 cd_command (dir
, from_tty
)
2487 /* Found something other than leading repetitions of "/..". */
2488 int found_real_path
;
2491 /* If the new directory is absolute, repeat is a no-op; if relative,
2492 repeat might be useful but is more likely to be a mistake. */
2496 error_no_arg ("new working directory");
2498 dir
= tilde_expand (dir
);
2499 make_cleanup (free
, dir
);
2501 if (chdir (dir
) < 0)
2502 perror_with_name (dir
);
2505 dir
= savestring (dir
, len
- (len
> 1 && dir
[len
-1] == '/'));
2507 current_directory
= dir
;
2510 if (current_directory
[0] == '/' && current_directory
[1] == '\0')
2511 current_directory
= concat (current_directory
, dir
, NULL
);
2513 current_directory
= concat (current_directory
, "/", dir
, NULL
);
2517 /* Now simplify any occurrences of `.' and `..' in the pathname. */
2519 found_real_path
= 0;
2520 for (p
= current_directory
; *p
;)
2522 if (p
[0] == '/' && p
[1] == '.' && (p
[2] == 0 || p
[2] == '/'))
2524 else if (p
[0] == '/' && p
[1] == '.' && p
[2] == '.'
2525 && (p
[3] == 0 || p
[3] == '/'))
2527 if (found_real_path
)
2529 /* Search backwards for the directory just before the "/.."
2530 and obliterate it and the "/..". */
2532 while (q
!= current_directory
&& q
[-1] != '/')
2535 if (q
== current_directory
)
2536 /* current_directory is
2537 a relative pathname ("can't happen"--leave it alone). */
2541 strcpy (q
- 1, p
+ 3);
2546 /* We are dealing with leading repetitions of "/..", for example
2547 "/../..", which is the Mach super-root. */
2552 found_real_path
= 1;
2557 forget_cached_source_info ();
2560 pwd_command ((char *) 0, 1);
2563 struct source_cleanup_lines_args
{
2566 char *old_pre_error
;
2567 char *old_error_pre_print
;
2571 source_cleanup_lines (args
)
2574 struct source_cleanup_lines_args
*p
=
2575 (struct source_cleanup_lines_args
*)args
;
2576 source_line_number
= p
->old_line
;
2577 source_file_name
= p
->old_file
;
2578 source_pre_error
= p
->old_pre_error
;
2579 error_pre_print
= p
->old_error_pre_print
;
2584 source_command (args
, from_tty
)
2589 struct cleanup
*old_cleanups
;
2591 struct source_cleanup_lines_args old_lines
;
2596 error ("source command requires pathname of file to source.");
2599 file
= tilde_expand (file
);
2600 old_cleanups
= make_cleanup (free
, file
);
2602 stream
= fopen (file
, FOPEN_RT
);
2604 perror_with_name (file
);
2606 make_cleanup (fclose
, stream
);
2608 old_lines
.old_line
= source_line_number
;
2609 old_lines
.old_file
= source_file_name
;
2610 old_lines
.old_pre_error
= source_pre_error
;
2611 old_lines
.old_error_pre_print
= error_pre_print
;
2612 make_cleanup (source_cleanup_lines
, &old_lines
);
2613 source_line_number
= 0;
2614 source_file_name
= file
;
2615 source_pre_error
= error_pre_print
== NULL
? "" : error_pre_print
;
2616 source_pre_error
= savestring (source_pre_error
, strlen (source_pre_error
));
2617 make_cleanup (free
, source_pre_error
);
2618 /* This will get set every time we read a line. So it won't stay "" for
2620 error_pre_print
= "";
2622 needed_length
= strlen (source_file_name
) + strlen (source_pre_error
) + 80;
2623 if (source_error_allocated
< needed_length
)
2625 source_error_allocated
*= 2;
2626 if (source_error_allocated
< needed_length
)
2627 source_error_allocated
= needed_length
;
2628 if (source_error
== NULL
)
2629 source_error
= xmalloc (source_error_allocated
);
2631 source_error
= xrealloc (source_error
, source_error_allocated
);
2634 read_command_file (stream
);
2636 do_cleanups (old_cleanups
);
2641 echo_command (text
, from_tty
)
2649 while ((c
= *p
++) != '\0')
2653 /* \ at end of argument is used after spaces
2654 so they won't be lost. */
2658 c
= parse_escape (&p
);
2660 printf_filtered ("%c", c
);
2663 printf_filtered ("%c", c
);
2666 /* Force this output to appear now. */
2668 gdb_flush (gdb_stdout
);
2672 #ifdef TARGET_BYTE_ORDER_SELECTABLE
2674 /* Functions to manipulate the endianness of the target. */
2676 #ifndef TARGET_BYTE_ORDER_DEFAULT
2677 #define TARGET_BYTE_ORDER_DEFAULT BIG_ENDIAN
2680 int target_byte_order
= TARGET_BYTE_ORDER_DEFAULT
;
2682 static int target_byte_order_auto
= 1;
2684 /* Called if the user enters ``set endian'' without an argument. */
2686 set_endian (args
, from_tty
)
2690 printf_unfiltered ("\"set endian\" must be followed by \"auto\", \"big\" or \"little\".\n");
2691 show_endian (args
, from_tty
);
2694 /* Called by ``set endian big''. */
2696 set_endian_big (args
, from_tty
)
2700 target_byte_order
= BIG_ENDIAN
;
2701 target_byte_order_auto
= 0;
2704 /* Called by ``set endian little''. */
2706 set_endian_little (args
, from_tty
)
2710 target_byte_order
= LITTLE_ENDIAN
;
2711 target_byte_order_auto
= 0;
2714 /* Called by ``set endian auto''. */
2716 set_endian_auto (args
, from_tty
)
2720 target_byte_order_auto
= 1;
2723 /* Called by ``show endian''. */
2725 show_endian (args
, from_tty
)
2730 (target_byte_order_auto
2731 ? "The target endianness is set automatically (currently %s endian)\n"
2732 : "The target is assumed to be %s endian\n");
2733 printf_unfiltered (msg
, TARGET_BYTE_ORDER
== BIG_ENDIAN
? "big" : "little");
2736 #endif /* defined (TARGET_BYTE_ORDER_SELECTABLE) */
2738 /* Set the endianness from a BFD. */
2740 set_endian_from_file (abfd
)
2743 #ifdef TARGET_BYTE_ORDER_SELECTABLE
2746 if (abfd
->xvec
->byteorder_big_p
)
2749 want
= LITTLE_ENDIAN
;
2750 if (target_byte_order_auto
)
2751 target_byte_order
= want
;
2752 else if (target_byte_order
!= want
)
2753 warning ("%s endian file does not match %s endian target.",
2754 want
== BIG_ENDIAN
? "big" : "little",
2755 TARGET_BYTE_ORDER
== BIG_ENDIAN
? "big" : "little");
2757 #else /* ! defined (TARGET_BYTE_ORDER_SELECTABLE) */
2759 if (abfd
->xvec
->byteorder_big_p
2760 ? TARGET_BYTE_ORDER
!= BIG_ENDIAN
2761 : TARGET_BYTE_ORDER
== BIG_ENDIAN
)
2762 warning ("%s endian file does not match %s endian target.",
2763 abfd
->xvec
->byteorder_big_p
? "big" : "little",
2764 TARGET_BYTE_ORDER
== BIG_ENDIAN
? "big" : "little");
2766 #endif /* ! defined (TARGET_BYTE_ORDER_SELECTABLE) */
2769 /* Functions to manipulate command line editing control variables. */
2771 /* Number of commands to print in each call to show_commands. */
2772 #define Hist_print 10
2774 show_commands (args
, from_tty
)
2778 /* Index for history commands. Relative to history_base. */
2781 /* Number of the history entry which we are planning to display next.
2782 Relative to history_base. */
2785 /* The first command in the history which doesn't exist (i.e. one more
2786 than the number of the last command). Relative to history_base. */
2789 extern HIST_ENTRY
*history_get
PARAMS ((int));
2791 /* Print out some of the commands from the command history. */
2792 /* First determine the length of the history list. */
2793 hist_len
= history_size
;
2794 for (offset
= 0; offset
< history_size
; offset
++)
2796 if (!history_get (history_base
+ offset
))
2805 if (args
[0] == '+' && args
[1] == '\0')
2806 /* "info editing +" should print from the stored position. */
2809 /* "info editing <exp>" should print around command number <exp>. */
2810 num
= (parse_and_eval_address (args
) - history_base
) - Hist_print
/ 2;
2812 /* "show commands" means print the last Hist_print commands. */
2815 num
= hist_len
- Hist_print
;
2821 /* If there are at least Hist_print commands, we want to display the last
2822 Hist_print rather than, say, the last 6. */
2823 if (hist_len
- num
< Hist_print
)
2825 num
= hist_len
- Hist_print
;
2830 for (offset
= num
; offset
< num
+ Hist_print
&& offset
< hist_len
; offset
++)
2832 printf_filtered ("%5d %s\n", history_base
+ offset
,
2833 (history_get (history_base
+ offset
))->line
);
2836 /* The next command we want to display is the next one that we haven't
2840 /* If the user repeats this command with return, it should do what
2841 "show commands +" does. This is unnecessary if arg is null,
2842 because "show commands +" is not useful after "show commands". */
2843 if (from_tty
&& args
)
2850 /* Called by do_setshow_command. */
2853 set_history_size_command (args
, from_tty
, c
)
2856 struct cmd_list_element
*c
;
2858 if (history_size
== INT_MAX
)
2859 unstifle_history ();
2860 else if (history_size
>= 0)
2861 stifle_history (history_size
);
2864 history_size
= INT_MAX
;
2865 error ("History size must be non-negative");
2871 set_history (args
, from_tty
)
2875 printf_unfiltered ("\"set history\" must be followed by the name of a history subcommand.\n");
2876 help_list (sethistlist
, "set history ", -1, gdb_stdout
);
2881 show_history (args
, from_tty
)
2885 cmd_show_list (showhistlist
, from_tty
, "");
2888 int info_verbose
= 0; /* Default verbose msgs off */
2890 /* Called by do_setshow_command. An elaborate joke. */
2893 set_verbose (args
, from_tty
, c
)
2896 struct cmd_list_element
*c
;
2898 char *cmdname
= "verbose";
2899 struct cmd_list_element
*showcmd
;
2901 showcmd
= lookup_cmd_1 (&cmdname
, showlist
, NULL
, 1);
2905 c
->doc
= "Set verbose printing of informational messages.";
2906 showcmd
->doc
= "Show verbose printing of informational messages.";
2910 c
->doc
= "Set verbosity.";
2911 showcmd
->doc
= "Show verbosity.";
2916 float_handler (signo
)
2919 /* This message is based on ANSI C, section 4.7. Note that integer
2920 divide by zero causes this, so "float" is a misnomer. */
2921 signal (SIGFPE
, float_handler
);
2922 error ("Erroneous arithmetic operation.");
2934 enablebreaklist
= NULL
;
2938 #ifdef TARGET_BYTE_ORDER_SELECTABLE
2942 showhistlist
= NULL
;
2943 unsethistlist
= NULL
;
2944 #if MAINTENANCE_CMDS
2945 maintenancelist
= NULL
;
2946 maintenanceinfolist
= NULL
;
2947 maintenanceprintlist
= NULL
;
2949 setprintlist
= NULL
;
2950 showprintlist
= NULL
;
2951 setchecklist
= NULL
;
2952 showchecklist
= NULL
;
2955 /* Init the history buffer. Note that we are called after the init file(s)
2956 * have been read so that the user can change the history file via his
2957 * .gdbinit file (for instance). The GDBHISTFILE environment variable
2958 * overrides all of this.
2966 tmpenv
= getenv ("HISTSIZE");
2968 history_size
= atoi (tmpenv
);
2969 else if (!history_size
)
2972 stifle_history (history_size
);
2974 tmpenv
= getenv ("GDBHISTFILE");
2976 history_filename
= savestring (tmpenv
, strlen(tmpenv
));
2977 else if (!history_filename
) {
2978 /* We include the current directory so that if the user changes
2979 directories the file written will be the same as the one
2981 history_filename
= concat (current_directory
, "/.gdb_history", NULL
);
2983 read_history (history_filename
);
2989 struct cmd_list_element
*c
;
2991 #ifdef TARGET_BYTE_ORDER_SELECTABLE
2993 add_prefix_cmd ("endian", class_support
, set_endian
,
2994 "Set endianness of target.",
2995 &endianlist
, "set endian ", 0, &setlist
);
2996 add_cmd ("big", class_support
, set_endian_big
,
2997 "Set target as being big endian.", &endianlist
);
2998 add_cmd ("little", class_support
, set_endian_little
,
2999 "Set target as being little endian.", &endianlist
);
3000 add_cmd ("auto", class_support
, set_endian_auto
,
3001 "Select target endianness automatically.", &endianlist
);
3002 add_cmd ("endian", class_support
, show_endian
,
3003 "Show endianness of target.", &showlist
);
3005 #endif /* defined (TARGET_BYTE_ORDER_SELECTABLE) */
3007 #ifdef DEFAULT_PROMPT
3008 prompt
= savestring (DEFAULT_PROMPT
, strlen(DEFAULT_PROMPT
));
3010 prompt
= savestring ("(gdb) ", 6);
3013 /* Set the important stuff up for command editing. */
3014 command_editing_p
= 1;
3015 history_expansion_p
= 0;
3016 write_history_p
= 0;
3018 /* Setup important stuff for command line editing. */
3019 rl_completion_entry_function
= (int (*)()) readline_line_completion_function
;
3020 rl_completer_word_break_characters
= gdb_completer_word_break_characters
;
3021 rl_completer_quote_characters
= gdb_completer_quote_characters
;
3022 rl_readline_name
= "gdb";
3024 /* Define the classes of commands.
3025 They will appear in the help list in the reverse of this order. */
3027 add_cmd ("internals", class_maintenance
, NO_FUNCTION
,
3028 "Maintenance commands.\n\
3029 Some gdb commands are provided just for use by gdb maintainers.\n\
3030 These commands are subject to frequent change, and may not be as\n\
3031 well documented as user commands.",
3033 add_cmd ("obscure", class_obscure
, NO_FUNCTION
, "Obscure features.", &cmdlist
);
3034 add_cmd ("aliases", class_alias
, NO_FUNCTION
, "Aliases of other commands.", &cmdlist
);
3035 add_cmd ("user-defined", class_user
, NO_FUNCTION
, "User-defined commands.\n\
3036 The commands in this class are those defined by the user.\n\
3037 Use the \"define\" command to define a command.", &cmdlist
);
3038 add_cmd ("support", class_support
, NO_FUNCTION
, "Support facilities.", &cmdlist
);
3039 add_cmd ("status", class_info
, NO_FUNCTION
, "Status inquiries.", &cmdlist
);
3040 add_cmd ("files", class_files
, NO_FUNCTION
, "Specifying and examining files.", &cmdlist
);
3041 add_cmd ("breakpoints", class_breakpoint
, NO_FUNCTION
, "Making program stop at certain points.", &cmdlist
);
3042 add_cmd ("data", class_vars
, NO_FUNCTION
, "Examining data.", &cmdlist
);
3043 add_cmd ("stack", class_stack
, NO_FUNCTION
, "Examining the stack.\n\
3044 The stack is made up of stack frames. Gdb assigns numbers to stack frames\n\
3045 counting from zero for the innermost (currently executing) frame.\n\n\
3046 At any time gdb identifies one frame as the \"selected\" frame.\n\
3047 Variable lookups are done with respect to the selected frame.\n\
3048 When the program being debugged stops, gdb selects the innermost frame.\n\
3049 The commands below can be used to select other frames by number or address.",
3051 add_cmd ("running", class_run
, NO_FUNCTION
, "Running the program.", &cmdlist
);
3053 add_com ("pwd", class_files
, pwd_command
,
3054 "Print working directory. This is used for your program as well.");
3055 c
= add_cmd ("cd", class_files
, cd_command
,
3056 "Set working directory to DIR for debugger and program being debugged.\n\
3057 The change does not take effect for the program being debugged\n\
3058 until the next time it is started.", &cmdlist
);
3059 c
->completer
= filename_completer
;
3062 (add_set_cmd ("prompt", class_support
, var_string
, (char *)&prompt
,
3067 add_com ("echo", class_support
, echo_command
,
3068 "Print a constant string. Give string as argument.\n\
3069 C escape sequences may be used in the argument.\n\
3070 No newline is added at the end of the argument;\n\
3071 use \"\\n\" if you want a newline to be printed.\n\
3072 Since leading and trailing whitespace are ignored in command arguments,\n\
3073 if you want to print some you must use \"\\\" before leading whitespace\n\
3074 to be printed or after trailing whitespace.");
3075 add_com ("document", class_support
, document_command
,
3076 "Document a user-defined command.\n\
3077 Give command name as argument. Give documentation on following lines.\n\
3078 End with a line of just \"end\".");
3079 add_com ("define", class_support
, define_command
,
3080 "Define a new command name. Command name is argument.\n\
3081 Definition appears on following lines, one command per line.\n\
3082 End with a line of just \"end\".\n\
3083 Use the \"document\" command to give documentation for the new command.\n\
3084 Commands defined in this way do not take arguments.");
3087 c
= add_cmd ("source", class_support
, source_command
,
3088 "Read commands from a file named FILE.\n\
3089 Note that the file \"" GDBINIT_FILENAME
"\" is read automatically in this way\n\
3090 when gdb is started.", &cmdlist
);
3092 /* Punt file name, we can't help it easily. */
3093 c
= add_cmd ("source", class_support
, source_command
,
3094 "Read commands from a file named FILE.\n\
3095 Note that the file \".gdbinit\" is read automatically in this way\n\
3096 when gdb is started.", &cmdlist
);
3098 c
->completer
= filename_completer
;
3100 add_com ("quit", class_support
, quit_command
, "Exit gdb.");
3101 add_com ("help", class_support
, help_command
, "Print list of commands.");
3102 add_com_alias ("q", "quit", class_support
, 1);
3103 add_com_alias ("h", "help", class_support
, 1);
3106 c
= add_set_cmd ("verbose", class_support
, var_boolean
, (char *)&info_verbose
,
3109 add_show_from_set (c
, &showlist
);
3110 c
->function
.sfunc
= set_verbose
;
3111 set_verbose (NULL
, 0, c
);
3114 (add_set_cmd ("editing", class_support
, var_boolean
, (char *)&command_editing_p
,
3115 "Set editing of command lines as they are typed.\n\
3116 Use \"on\" to enable to enable the editing, and \"off\" to disable it.\n\
3117 Without an argument, command line editing is enabled. To edit, use\n\
3118 EMACS-like or VI-like commands like control-P or ESC.", &setlist
),
3121 add_prefix_cmd ("history", class_support
, set_history
,
3122 "Generic command for setting command history parameters.",
3123 &sethistlist
, "set history ", 0, &setlist
);
3124 add_prefix_cmd ("history", class_support
, show_history
,
3125 "Generic command for showing command history parameters.",
3126 &showhistlist
, "show history ", 0, &showlist
);
3129 (add_set_cmd ("expansion", no_class
, var_boolean
, (char *)&history_expansion_p
,
3130 "Set history expansion on command input.\n\
3131 Without an argument, history expansion is enabled.", &sethistlist
),
3135 (add_set_cmd ("save", no_class
, var_boolean
, (char *)&write_history_p
,
3136 "Set saving of the history record on exit.\n\
3137 Use \"on\" to enable to enable the saving, and \"off\" to disable it.\n\
3138 Without an argument, saving is enabled.", &sethistlist
),
3141 c
= add_set_cmd ("size", no_class
, var_integer
, (char *)&history_size
,
3142 "Set the size of the command history, \n\
3143 ie. the number of previous commands to keep a record of.", &sethistlist
);
3144 add_show_from_set (c
, &showhistlist
);
3145 c
->function
.sfunc
= set_history_size_command
;
3148 (add_set_cmd ("filename", no_class
, var_filename
, (char *)&history_filename
,
3149 "Set the filename in which to record the command history\n\
3150 (the list of previous commands of which a record is kept).", &sethistlist
),
3154 (add_set_cmd ("confirm", class_support
, var_boolean
,
3156 "Set whether to confirm potentially dangerous operations.",
3160 add_prefix_cmd ("info", class_info
, info_command
,
3161 "Generic command for showing things about the program being debugged.",
3162 &infolist
, "info ", 0, &cmdlist
);
3163 add_com_alias ("i", "info", class_info
, 1);
3165 add_com ("complete", class_obscure
, complete_command
,
3166 "List the completions for the rest of the line as a command.");
3168 add_prefix_cmd ("show", class_info
, show_command
,
3169 "Generic command for showing things about the debugger.",
3170 &showlist
, "show ", 0, &cmdlist
);
3171 /* Another way to get at the same thing. */
3172 add_info ("set", show_command
, "Show all GDB settings.");
3174 add_cmd ("commands", no_class
, show_commands
,
3175 "Show the the history of commands you typed.\n\
3176 You can supply a command number to start with, or a `+' to start after\n\
3177 the previous command number shown.",
3180 add_cmd ("version", no_class
, show_version
,
3181 "Show what version of GDB this is.", &showlist
);
3183 add_com ("while", class_support
, while_command
,
3184 "Execute nested commands WHILE the conditional expression is non zero.\n\
3185 The conditional expression must follow the word `while' and must in turn be\
3186 followed by a new line. The nested commands must be entered one per line,\
3187 and should be terminated by the word `end'.");
3189 add_com ("if", class_support
, if_command
,
3190 "Execute nested commands once IF the conditional expression is non zero.\n\
3191 The conditional expression must follow the word `if' and must in turn be\
3192 followed by a new line. The nested commands must be entered one per line,\
3193 and should be terminated by the word 'else' or `end'. If an else clause\
3194 is used, the same rules apply to its nested commands as to the first ones.");
3196 /* If target is open when baud changes, it doesn't take effect until the
3197 next open (I think, not sure). */
3198 add_show_from_set (add_set_cmd ("remotebaud", no_class
,
3199 var_zinteger
, (char *)&baud_rate
,
3200 "Set baud rate for remote serial I/O.\n\
3201 This value is used to set the speed of the serial port when debugging\n\
3202 using remote targets.", &setlist
),
3206 add_set_cmd ("remotedebug", no_class
, var_zinteger
, (char *)&remote_debug
,
3207 "Set debugging of remote protocol.\n\
3208 When enabled, each packet sent or received with the remote target\n\
3209 is displayed.", &setlist
),