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 ();
560 void (*pre_init_ui_hook
) PARAMS ((void));
565 if (pre_init_ui_hook
)
568 /* Run the init function of each source file */
570 getcwd (gdb_dirbuf
, sizeof (gdb_dirbuf
));
571 current_directory
= gdb_dirbuf
;
573 init_cmd_lists (); /* This needs to be done first */
574 initialize_targets (); /* Setup target_terminal macros for utils.c */
575 initialize_utils (); /* Make errors and warnings possible */
576 initialize_all_files ();
577 init_main (); /* But that omits this file! Do it now */
582 /* We need a default language for parsing expressions, so simple things like
583 "set width 0" won't fail if no language is explicitly set in a config file
584 or implicitly set by reading an executable during startup. */
585 set_language (language_c
);
586 expected_language
= current_language
; /* don't warn about the change. */
592 /* Allocate, initialize a new command line structure for one of the
593 control commands (if/while). */
595 static struct command_line
*
596 build_command_line (type
, args
)
597 enum command_control_type type
;
600 struct command_line
*cmd
;
602 cmd
= (struct command_line
*)xmalloc (sizeof (struct command_line
));
604 cmd
->control_type
= type
;
608 = (struct command_line
**)xmalloc (sizeof (struct command_line
*)
610 memset (cmd
->body_list
, 0, sizeof (struct command_line
*) * cmd
->body_count
);
611 cmd
->line
= savestring (args
, strlen (args
));
615 /* Build and return a new command structure for the control commands
616 such as "if" and "while". */
618 static struct command_line
*
619 get_command_line (type
, arg
)
620 enum command_control_type type
;
623 struct command_line
*cmd
;
624 struct cleanup
*old_chain
= NULL
;
626 /* Allocate and build a new command line structure. */
627 cmd
= build_command_line (type
, arg
);
629 old_chain
= make_cleanup (free_command_lines
, &cmd
);
631 /* Read in the body of this command. */
632 if (recurse_read_control_structure (cmd
) == invalid_control
)
634 warning ("error reading in control structure\n");
635 do_cleanups (old_chain
);
639 discard_cleanups (old_chain
);
643 /* Execute the command in CMD. */
645 static enum command_control_type
646 execute_control_command (cmd
)
647 struct command_line
*cmd
;
649 struct expression
*expr
;
650 struct command_line
*current
;
651 struct cleanup
*old_chain
= 0;
652 struct cleanup
*tmp_chain
;
655 enum command_control_type ret
;
657 switch (cmd
->control_type
)
660 /* A simple command, execute it and return. */
661 execute_command (cmd
->line
, 0);
662 return cmd
->control_type
;
664 case continue_control
:
666 /* Return for "continue", and "break" so we can either
667 continue the loop at the top, or break out. */
668 return cmd
->control_type
;
672 /* Parse the loop control expression for the while statement. */
673 expr
= parse_expression (cmd
->line
);
674 tmp_chain
= make_cleanup (free_current_contents
, &expr
);
676 old_chain
= tmp_chain
;
678 ret
= simple_control
;
681 /* Keep iterating so long as the expression is true. */
684 /* Evaluate the expression. */
685 val
= evaluate_expression (expr
);
687 /* If the value is false, then break out of the loop. */
688 if (!value_true (val
))
691 /* Execute the body of the while statement. */
692 current
= *cmd
->body_list
;
695 ret
= execute_control_command (current
);
697 /* If we got an error, or a "break" command, then stop
699 if (ret
== invalid_control
|| ret
== break_control
)
705 /* If we got a "continue" command, then restart the loop
707 if (ret
== continue_control
)
710 /* Get the next statement. */
711 current
= current
->next
;
715 /* Reset RET so that we don't recurse the break all the way down. */
716 if (ret
== break_control
)
717 ret
= simple_control
;
724 /* Parse the conditional for the if statement. */
725 expr
= parse_expression (cmd
->line
);
726 old_chain
= make_cleanup (free_current_contents
, &expr
);
729 ret
= simple_control
;
731 /* Evaluate the conditional. */
732 val
= evaluate_expression (expr
);
734 /* Choose which arm to take commands from based on the value of the
735 conditional expression. */
736 if (value_true (val
))
737 current
= *cmd
->body_list
;
738 else if (cmd
->body_count
== 2)
739 current
= *(cmd
->body_list
+ 1);
741 /* Execute commands in the given arm. */
744 ret
= execute_control_command (current
);
746 /* If we got an error, get out. */
747 if (ret
!= simple_control
)
750 /* Get the next statement in the body. */
751 current
= current
->next
;
757 warning ("Invalid control type in command structure.");
758 return invalid_control
;
762 do_cleanups (old_chain
);
767 /* "while" command support. Executes a body of statements while the
768 loop condition is nonzero. */
771 while_command (arg
, from_tty
)
775 struct command_line
*command
= NULL
;
778 command
= get_command_line (while_control
, arg
);
783 execute_control_command (command
);
784 free_command_lines (&command
);
787 /* "if" command support. Execute either the true or false arm depending
788 on the value of the if conditional. */
791 if_command (arg
, from_tty
)
795 struct command_line
*command
= NULL
;
798 command
= get_command_line (if_control
, arg
);
803 execute_control_command (command
);
804 free_command_lines (&command
);
808 execute_user_command (c
, args
)
809 struct cmd_list_element
*c
;
812 register struct command_line
*cmdlines
;
813 struct cleanup
*old_chain
;
814 enum command_control_type ret
;
817 error ("User-defined commands cannot take arguments.");
819 cmdlines
= c
->user_commands
;
824 /* Set the instream to 0, indicating execution of a
825 user-defined function. */
826 old_chain
= make_cleanup (source_cleanup
, instream
);
827 instream
= (FILE *) 0;
830 ret
= execute_control_command (cmdlines
);
831 if (ret
!= simple_control
&& ret
!= break_control
)
833 warning ("Error in control structure.\n");
836 cmdlines
= cmdlines
->next
;
838 do_cleanups (old_chain
);
841 /* Execute the line P as a command.
842 Pass FROM_TTY as second argument to the defining function. */
845 execute_command (p
, from_tty
)
849 register struct cmd_list_element
*c
;
850 register enum language flang
;
851 static int warned
= 0;
855 /* This can happen when command_line_input hits end of file. */
859 while (*p
== ' ' || *p
== '\t') p
++;
864 c
= lookup_cmd (&p
, cmdlist
, "", 0, 1);
865 /* Pass null arg rather than an empty one. */
868 /* If this command has been hooked, run the hook first. */
870 execute_user_command (c
->hook
, (char *)0);
872 if (c
->class == class_user
)
873 execute_user_command (c
, arg
);
874 else if (c
->type
== set_cmd
|| c
->type
== show_cmd
)
875 do_setshow_command (arg
, from_tty
& caution
, c
);
876 else if (c
->function
.cfunc
== NO_FUNCTION
)
877 error ("That is not a command, just a help topic.");
878 else if (call_command_hook
)
879 call_command_hook (c
, arg
, from_tty
& caution
);
881 (*c
->function
.cfunc
) (arg
, from_tty
& caution
);
884 /* Tell the user if the language has changed (except first time). */
885 if (current_language
!= expected_language
)
887 if (language_mode
== language_mode_auto
) {
888 language_info (1); /* Print what changed. */
893 /* Warn the user if the working language does not match the
894 language of the current frame. Only warn the user if we are
895 actually running the program, i.e. there is a stack. */
896 /* FIXME: This should be cacheing the frame and only running when
897 the frame changes. */
899 if (target_has_stack
)
901 flang
= get_frame_language ();
903 && flang
!= language_unknown
904 && flang
!= current_language
->la_language
)
906 printf_filtered ("%s\n", lang_frame_mismatch_warn
);
914 command_loop_marker (foo
)
919 /* Read commands from `instream' and execute them
920 until end of file or error reading instream. */
925 struct cleanup
*old_chain
;
927 int stdin_is_tty
= ISATTY (stdin
);
928 long time_at_cmd_start
;
929 extern int display_time
;
930 extern int display_space
;
932 while (!feof (instream
))
934 if (window_hook
&& instream
== stdin
)
935 (*window_hook
) (instream
, prompt
);
938 if (instream
== stdin
&& stdin_is_tty
)
939 reinitialize_more_filter ();
940 old_chain
= make_cleanup (command_loop_marker
, 0);
941 command
= command_line_input (instream
== stdin
? prompt
: (char *) NULL
,
942 instream
== stdin
, "prompt");
946 time_at_cmd_start
= get_run_time ();
948 execute_command (command
, instream
== stdin
);
949 /* Do any commands attached to breakpoint we stopped at. */
950 bpstat_do_actions (&stop_bpstat
);
951 do_cleanups (old_chain
);
955 long cmd_time
= get_run_time () - time_at_cmd_start
;
957 printf_unfiltered ("Command execution time: %ld.%06ld\n",
958 cmd_time
/ 1000000, cmd_time
% 1000000);
963 extern char **environ
;
964 char *lim
= (char *) sbrk (0);
966 printf_unfiltered ("Post-command data size: %ld\n",
967 (long) (lim
- (char *) &environ
));
972 /* Commands call this if they do not want to be repeated by null lines. */
980 /* If we aren't reading from standard input, we are saving the last
981 thing read from stdin in line and don't want to delete it. Null lines
982 won't repeat here in any case. */
983 if (instream
== stdin
)
987 /* Read a line from the stream "instream" without command line editing.
989 It prints PRROMPT once at the start.
990 Action is compatible with "readline", e.g. space for the result is
991 malloc'd and should be freed by the caller.
993 A NULL return means end of file. */
995 gdb_readline (prrompt
)
1000 int input_index
= 0;
1001 int result_size
= 80;
1005 /* Don't use a _filtered function here. It causes the assumed
1006 character position to be off, since the newline we read from
1007 the user is not accounted for. */
1008 fputs_unfiltered (prrompt
, gdb_stdout
);
1009 /* start-sanitize-mpw */
1011 /* Move to a new line so the entered line doesn't have a prompt
1012 on the front of it. */
1013 fputs_unfiltered ("\n", gdb_stdout
);
1015 /* end-sanitize-mpw */
1016 gdb_flush (gdb_stdout
);
1019 result
= (char *) xmalloc (result_size
);
1023 /* Read from stdin if we are executing a user defined command.
1024 This is the right thing for prompt_for_continue, at least. */
1025 c
= fgetc (instream
? instream
: stdin
);
1029 if (input_index
> 0)
1030 /* The last line does not end with a newline. Return it, and
1031 if we are called again fgetc will still return EOF and
1032 we'll return NULL then. */
1041 result
[input_index
++] = c
;
1042 while (input_index
>= result_size
)
1045 result
= (char *) xrealloc (result
, result_size
);
1049 result
[input_index
++] = '\0';
1053 /* Variables which control command line editing and history
1054 substitution. These variables are given default values at the end
1056 static int command_editing_p
;
1057 static int history_expansion_p
;
1058 static int write_history_p
;
1059 static int history_size
;
1060 static char *history_filename
;
1062 /* readline uses the word breaks for two things:
1063 (1) In figuring out where to point the TEXT parameter to the
1064 rl_completion_entry_function. Since we don't use TEXT for much,
1065 it doesn't matter a lot what the word breaks are for this purpose, but
1066 it does affect how much stuff M-? lists.
1067 (2) If one of the matches contains a word break character, readline
1068 will quote it. That's why we switch between
1069 gdb_completer_word_break_characters and
1070 gdb_completer_command_word_break_characters. I'm not sure when
1071 we need this behavior (perhaps for funky characters in C++ symbols?). */
1073 /* Variables which are necessary for fancy command line editing. */
1074 char *gdb_completer_word_break_characters
=
1075 " \t\n!@#$%^&*()+=|~`}{[]\"';:?/>.<,-";
1077 /* When completing on command names, we remove '-' from the list of
1078 word break characters, since we use it in command names. If the
1079 readline library sees one in any of the current completion strings,
1080 it thinks that the string needs to be quoted and automatically supplies
1082 char *gdb_completer_command_word_break_characters
=
1083 " \t\n!@#$%^&*()+=|~`}{[]\"';:?/>.<,";
1085 /* Characters that can be used to quote completion strings. Note that we
1086 can't include '"' because the gdb C parser treats such quoted sequences
1088 char *gdb_completer_quote_characters
=
1091 /* Functions that are used as part of the fancy command line editing. */
1093 /* This can be used for functions which don't want to complete on symbols
1094 but don't want to complete on anything else either. */
1097 noop_completer (text
, prefix
)
1104 /* Complete on filenames. */
1106 filename_completer (text
, word
)
1110 /* From readline. */
1111 extern char *filename_completion_function ();
1112 int subsequent_name
;
1114 int return_val_used
;
1115 int return_val_alloced
;
1117 return_val_used
= 0;
1118 /* Small for testing. */
1119 return_val_alloced
= 1;
1120 return_val
= (char **) xmalloc (return_val_alloced
* sizeof (char *));
1122 subsequent_name
= 0;
1126 p
= filename_completion_function (text
, subsequent_name
);
1127 if (return_val_used
>= return_val_alloced
)
1129 return_val_alloced
*= 2;
1131 (char **) xrealloc (return_val
,
1132 return_val_alloced
* sizeof (char *));
1136 return_val
[return_val_used
++] = p
;
1139 /* Like emacs, don't complete on old versions. Especially useful
1140 in the "source" command. */
1141 if (p
[strlen (p
) - 1] == '~')
1147 /* Return exactly p. */
1148 return_val
[return_val_used
++] = p
;
1149 else if (word
> text
)
1151 /* Return some portion of p. */
1152 q
= xmalloc (strlen (p
) + 5);
1153 strcpy (q
, p
+ (word
- text
));
1154 return_val
[return_val_used
++] = q
;
1159 /* Return some of TEXT plus p. */
1160 q
= xmalloc (strlen (p
) + (text
- word
) + 5);
1161 strncpy (q
, word
, text
- word
);
1162 q
[text
- word
] = '\0';
1164 return_val
[return_val_used
++] = q
;
1168 subsequent_name
= 1;
1171 /* There is no way to do this just long enough to affect quote inserting
1172 without also affecting the next completion. This should be fixed in
1174 /* Insure that readline does the right thing
1175 with respect to inserting quotes. */
1176 rl_completer_word_break_characters
= "";
1181 /* Here are some useful test cases for completion. FIXME: These should
1182 be put in the test suite. They should be tested with both M-? and TAB.
1184 "show output-" "radix"
1185 "show output" "-radix"
1186 "p" ambiguous (commands starting with p--path, print, printf, etc.)
1187 "p " ambiguous (all symbols)
1188 "info t foo" no completions
1189 "info t " no completions
1190 "info t" ambiguous ("info target", "info terminal", etc.)
1191 "info ajksdlfk" no completions
1192 "info ajksdlfk " no completions
1194 "info " ambiguous (all info commands)
1195 "p \"a" no completions (string constant)
1196 "p 'a" ambiguous (all symbols starting with a)
1197 "p b-a" ambiguous (all symbols starting with a)
1198 "p b-" ambiguous (all symbols)
1199 "file Make" "file" (word break hard to screw up here)
1200 "file ../gdb.stabs/we" "ird" (needs to not break word at slash)
1203 /* Generate completions one by one for the completer. Each time we are
1204 called return another potential completion to the caller.
1205 line_completion just completes on commands or passes the buck to the
1206 command's completer function, the stuff specific to symbol completion
1207 is in make_symbol_completion_list.
1209 TEXT is the caller's idea of the "word" we are looking at.
1211 MATCHES is the number of matches that have currently been collected from
1212 calling this completion function. When zero, then we need to initialize,
1213 otherwise the initialization has already taken place and we can just
1214 return the next potential completion string.
1216 LINE_BUFFER is available to be looked at; it contains the entire text
1217 of the line. POINT is the offset in that line of the cursor. You
1218 should pretend that the line ends at POINT.
1220 Returns NULL if there are no more completions, else a pointer to a string
1221 which is a possible completion, it is the caller's responsibility to
1225 line_completion_function (text
, matches
, line_buffer
, point
)
1231 static char **list
= (char **)NULL
; /* Cache of completions */
1232 static int index
; /* Next cached completion */
1233 char *output
= NULL
;
1234 char *tmp_command
, *p
;
1235 /* Pointer within tmp_command which corresponds to text. */
1237 struct cmd_list_element
*c
, *result_list
;
1241 /* The caller is beginning to accumulate a new set of completions, so
1242 we need to find all of them now, and cache them for returning one at
1243 a time on future calls. */
1247 /* Free the storage used by LIST, but not by the strings inside.
1248 This is because rl_complete_internal () frees the strings. */
1254 /* Choose the default set of word break characters to break completions.
1255 If we later find out that we are doing completions on command strings
1256 (as opposed to strings supplied by the individual command completer
1257 functions, which can be any string) then we will switch to the
1258 special word break set for command strings, which leaves out the
1259 '-' character used in some commands. */
1261 rl_completer_word_break_characters
=
1262 gdb_completer_word_break_characters
;
1264 /* Decide whether to complete on a list of gdb commands or on symbols. */
1265 tmp_command
= (char *) alloca (point
+ 1);
1268 strncpy (tmp_command
, line_buffer
, point
);
1269 tmp_command
[point
] = '\0';
1270 /* Since text always contains some number of characters leading up
1271 to point, we can find the equivalent position in tmp_command
1272 by subtracting that many characters from the end of tmp_command. */
1273 word
= tmp_command
+ point
- strlen (text
);
1277 /* An empty line we want to consider ambiguous; that is, it
1278 could be any command. */
1279 c
= (struct cmd_list_element
*) -1;
1284 c
= lookup_cmd_1 (&p
, cmdlist
, &result_list
, 1);
1287 /* Move p up to the next interesting thing. */
1288 while (*p
== ' ' || *p
== '\t')
1295 /* It is an unrecognized command. So there are no
1296 possible completions. */
1299 else if (c
== (struct cmd_list_element
*) -1)
1303 /* lookup_cmd_1 advances p up to the first ambiguous thing, but
1304 doesn't advance over that thing itself. Do so now. */
1306 while (*q
&& (isalnum (*q
) || *q
== '-' || *q
== '_'))
1308 if (q
!= tmp_command
+ point
)
1310 /* There is something beyond the ambiguous
1311 command, so there are no possible completions. For
1312 example, "info t " or "info t foo" does not complete
1313 to anything, because "info t" can be "info target" or
1319 /* We're trying to complete on the command which was ambiguous.
1320 This we can deal with. */
1323 list
= complete_on_cmdlist (*result_list
->prefixlist
, p
,
1328 list
= complete_on_cmdlist (cmdlist
, p
, word
);
1330 /* Insure that readline does the right thing with respect to
1331 inserting quotes. */
1332 rl_completer_word_break_characters
=
1333 gdb_completer_command_word_break_characters
;
1338 /* We've recognized a full command. */
1340 if (p
== tmp_command
+ point
)
1342 /* There is no non-whitespace in the line beyond the command. */
1344 if (p
[-1] == ' ' || p
[-1] == '\t')
1346 /* The command is followed by whitespace; we need to complete
1347 on whatever comes after command. */
1350 /* It is a prefix command; what comes after it is
1351 a subcommand (e.g. "info "). */
1352 list
= complete_on_cmdlist (*c
->prefixlist
, p
, word
);
1354 /* Insure that readline does the right thing
1355 with respect to inserting quotes. */
1356 rl_completer_word_break_characters
=
1357 gdb_completer_command_word_break_characters
;
1361 /* It is a normal command; what comes after it is
1362 completed by the command's completer function. */
1363 list
= (*c
->completer
) (p
, word
);
1368 /* The command is not followed by whitespace; we need to
1369 complete on the command itself. e.g. "p" which is a
1370 command itself but also can complete to "print", "ptype"
1374 /* Find the command we are completing on. */
1376 while (q
> tmp_command
)
1378 if (isalnum (q
[-1]) || q
[-1] == '-' || q
[-1] == '_')
1384 list
= complete_on_cmdlist (result_list
, q
, word
);
1386 /* Insure that readline does the right thing
1387 with respect to inserting quotes. */
1388 rl_completer_word_break_characters
=
1389 gdb_completer_command_word_break_characters
;
1394 /* There is non-whitespace beyond the command. */
1396 if (c
->prefixlist
&& !c
->allow_unknown
)
1398 /* It is an unrecognized subcommand of a prefix command,
1399 e.g. "info adsfkdj". */
1404 /* It is a normal command. */
1405 list
= (*c
->completer
) (p
, word
);
1411 /* If we found a list of potential completions during initialization then
1412 dole them out one at a time. The vector of completions is NULL
1413 terminated, so after returning the last one, return NULL (and continue
1414 to do so) each time we are called after that, until a new list is
1419 output
= list
[index
];
1427 /* Can't do this because readline hasn't yet checked the word breaks
1428 for figuring out whether to insert a quote. */
1430 /* Make sure the word break characters are set back to normal for the
1431 next time that readline tries to complete something. */
1432 rl_completer_word_break_characters
=
1433 gdb_completer_word_break_characters
;
1439 /* Line completion interface function for readline. */
1442 readline_line_completion_function (text
, matches
)
1446 return line_completion_function (text
, matches
, rl_line_buffer
, rl_point
);
1449 /* Skip over a possibly quoted word (as defined by the quote characters
1450 and word break characters the completer uses). Returns pointer to the
1451 location after the "word". */
1457 char quote_char
= '\0';
1460 for (scan
= str
; *scan
!= '\0'; scan
++)
1462 if (quote_char
!= '\0')
1464 /* Ignore everything until the matching close quote char */
1465 if (*scan
== quote_char
)
1467 /* Found matching close quote. */
1472 else if (strchr (gdb_completer_quote_characters
, *scan
))
1474 /* Found start of a quoted string. */
1477 else if (strchr (gdb_completer_word_break_characters
, *scan
))
1491 #if STOP_SIGNAL == SIGTSTP
1492 signal (SIGTSTP
, SIG_DFL
);
1494 kill (getpid (), SIGTSTP
);
1495 signal (SIGTSTP
, stop_sig
);
1497 signal (STOP_SIGNAL
, stop_sig
);
1499 printf_unfiltered ("%s", prompt
);
1500 gdb_flush (gdb_stdout
);
1502 /* Forget about any previous command -- null line now will do nothing. */
1505 #endif /* STOP_SIGNAL */
1507 /* Initialize signal handlers. */
1517 signal (SIGINT
, request_quit
);
1519 /* If we initialize SIGQUIT to SIG_IGN, then the SIG_IGN will get
1520 passed to the inferior, which we don't want. It would be
1521 possible to do a "signal (SIGQUIT, SIG_DFL)" after we fork, but
1522 on BSD4.3 systems using vfork, that can affect the
1523 GDB process as well as the inferior (the signal handling tables
1524 might be in memory, shared between the two). Since we establish
1525 a handler for SIGQUIT, when we call exec it will set the signal
1526 to SIG_DFL for us. */
1527 signal (SIGQUIT
, do_nothing
);
1528 if (signal (SIGHUP
, do_nothing
) != SIG_IGN
)
1529 signal (SIGHUP
, disconnect
);
1530 signal (SIGFPE
, float_handler
);
1532 #if defined(SIGWINCH) && defined(SIGWINCH_HANDLER)
1533 signal (SIGWINCH
, SIGWINCH_HANDLER
);
1537 /* Read one line from the command input stream `instream'
1538 into the local static buffer `linebuffer' (whose current length
1540 The buffer is made bigger as necessary.
1541 Returns the address of the start of the line.
1543 NULL is returned for end of file.
1545 *If* the instream == stdin & stdin is a terminal, the line read
1546 is copied into the file line saver (global var char *line,
1547 length linesize) so that it can be duplicated.
1549 This routine either uses fancy command line editing or
1550 simple input as the user has requested. */
1553 command_line_input (prrompt
, repeat
, annotation_suffix
)
1556 char *annotation_suffix
;
1558 static char *linebuffer
= 0;
1559 static unsigned linelength
= 0;
1563 char *local_prompt
= prrompt
;
1568 if (annotation_level
> 1 && instream
== stdin
)
1570 local_prompt
= alloca ((prrompt
== NULL
? 0 : strlen (prrompt
))
1571 + strlen (annotation_suffix
) + 40);
1572 if (prrompt
== NULL
)
1573 local_prompt
[0] = '\0';
1575 strcpy (local_prompt
, prrompt
);
1576 strcat (local_prompt
, "\n\032\032");
1577 strcat (local_prompt
, annotation_suffix
);
1578 strcat (local_prompt
, "\n");
1581 if (linebuffer
== 0)
1584 linebuffer
= (char *) xmalloc (linelength
);
1589 /* Control-C quits instantly if typed while in this loop
1590 since it should not wait until the user types a newline. */
1594 signal (STOP_SIGNAL
, stop_sig
);
1599 /* Make sure that all output has been output. Some machines may let
1600 you get away with leaving out some of the gdb_flush, but not all. */
1602 gdb_flush (gdb_stdout
);
1603 gdb_flush (gdb_stderr
);
1605 if (source_file_name
!= NULL
)
1607 ++source_line_number
;
1608 sprintf (source_error
,
1609 "%s%s:%d: Error in sourced command file:\n",
1612 source_line_number
);
1613 error_pre_print
= source_error
;
1616 if (annotation_level
> 1 && instream
== stdin
)
1618 printf_unfiltered ("\n\032\032pre-");
1619 printf_unfiltered (annotation_suffix
);
1620 printf_unfiltered ("\n");
1623 /* Don't use fancy stuff if not talking to stdin. */
1624 if (command_editing_p
&& instream
== stdin
1625 && ISATTY (instream
))
1626 rl
= readline (local_prompt
);
1628 rl
= gdb_readline (local_prompt
);
1630 if (annotation_level
> 1 && instream
== stdin
)
1632 printf_unfiltered ("\n\032\032post-");
1633 printf_unfiltered (annotation_suffix
);
1634 printf_unfiltered ("\n");
1637 if (!rl
|| rl
== (char *) EOF
)
1642 if (strlen(rl
) + 1 + (p
- linebuffer
) > linelength
)
1644 linelength
= strlen(rl
) + 1 + (p
- linebuffer
);
1645 nline
= (char *) xrealloc (linebuffer
, linelength
);
1646 p
+= nline
- linebuffer
;
1650 /* Copy line. Don't copy null at end. (Leaves line alone
1651 if this was just a newline) */
1655 free (rl
); /* Allocated in readline. */
1657 if (p
== linebuffer
|| *(p
- 1) != '\\')
1660 p
--; /* Put on top of '\'. */
1661 local_prompt
= (char *) 0;
1666 signal (STOP_SIGNAL
, SIG_DFL
);
1673 #define SERVER_COMMAND_LENGTH 7
1675 (p
- linebuffer
> SERVER_COMMAND_LENGTH
)
1676 && STREQN (linebuffer
, "server ", SERVER_COMMAND_LENGTH
);
1679 /* Note that we don't set `line'. Between this and the check in
1680 dont_repeat, this insures that repeating will still do the
1683 return linebuffer
+ SERVER_COMMAND_LENGTH
;
1686 /* Do history expansion if that is wished. */
1687 if (history_expansion_p
&& instream
== stdin
1688 && ISATTY (instream
))
1690 char *history_value
;
1693 *p
= '\0'; /* Insert null now. */
1694 expanded
= history_expand (linebuffer
, &history_value
);
1697 /* Print the changes. */
1698 printf_unfiltered ("%s\n", history_value
);
1700 /* If there was an error, call this function again. */
1703 free (history_value
);
1704 return command_line_input (prrompt
, repeat
, annotation_suffix
);
1706 if (strlen (history_value
) > linelength
)
1708 linelength
= strlen (history_value
) + 1;
1709 linebuffer
= (char *) xrealloc (linebuffer
, linelength
);
1711 strcpy (linebuffer
, history_value
);
1712 p
= linebuffer
+ strlen(linebuffer
);
1713 free (history_value
);
1717 /* If we just got an empty line, and that is supposed
1718 to repeat the previous command, return the value in the
1722 if (p
== linebuffer
)
1725 while (*p1
== ' ' || *p1
== '\t')
1733 /* Add line to history if appropriate. */
1734 if (instream
== stdin
1735 && ISATTY (stdin
) && *linebuffer
)
1736 add_history (linebuffer
);
1738 /* Note: lines consisting solely of comments are added to the command
1739 history. This is useful when you type a command, and then
1740 realize you don't want to execute it quite yet. You can comment
1741 out the command and then later fetch it from the value history
1742 and remove the '#'. The kill ring is probably better, but some
1743 people are in the habit of commenting things out. */
1745 while ((c
= *p1
++) != '\0')
1748 while ((c
= *p1
++) != '"')
1750 /* Make sure an escaped '"' doesn't make us think the string
1758 while ((c
= *p1
++) != '\'')
1760 /* Make sure an escaped '\'' doesn't make us think the string
1769 /* Found a comment. */
1775 /* Save into global buffer if appropriate. */
1778 if (linelength
> linesize
)
1780 line
= xrealloc (line
, linelength
);
1781 linesize
= linelength
;
1783 strcpy (line
, linebuffer
);
1791 /* Expand the body_list of COMMAND so that it can hold NEW_LENGTH
1792 code bodies. This is typically used when we encounter an "else"
1793 clause for an "if" command. */
1796 realloc_body_list (command
, new_length
)
1797 struct command_line
*command
;
1801 struct command_line
**body_list
;
1803 n
= command
->body_count
;
1805 /* Nothing to do? */
1806 if (new_length
<= n
)
1809 body_list
= (struct command_line
**)
1810 xmalloc (sizeof (struct command_line
*) * new_length
);
1812 memcpy (body_list
, command
->body_list
, sizeof (struct command_line
*) * n
);
1814 free (command
->body_list
);
1815 command
->body_list
= body_list
;
1816 command
->body_count
= new_length
;
1819 /* Read one line from the input stream. If the command is an "else" or
1820 "end", return such an indication to the caller. */
1822 static enum misc_command_type
1823 read_next_line (command
)
1824 struct command_line
**command
;
1826 char *p
, *p1
, *prompt_ptr
, control_prompt
[256];
1829 if (control_level
>= 254)
1830 error ("Control nesting too deep!\n");
1832 /* Set a prompt based on the nesting of the control commands. */
1833 if (instream
== stdin
)
1835 for (i
= 0; i
< control_level
; i
++)
1836 control_prompt
[i
] = ' ';
1837 control_prompt
[i
] = '>';
1838 control_prompt
[i
+1] = '\0';
1839 prompt_ptr
= (char *)&control_prompt
[0];
1844 p
= command_line_input (prompt_ptr
, instream
== stdin
, NULL
);
1846 /* Not sure what to do here. */
1850 /* Strip leading and trailing whitespace. */
1851 while (*p
== ' ' || *p
== '\t')
1854 p1
= p
+ strlen (p
);
1855 while (p1
!= p
&& (p1
[-1] == ' ' || p1
[-1] == '\t'))
1858 /* Blanks and comments don't really do anything, but we need to
1859 distinguish them from else, end and other commands which can be
1861 if (p1
== p
|| p
[0] == '#')
1864 /* Is this the end of a simple, while, or if control structure? */
1865 if (p1
- p
== 3 && !strncmp (p
, "end", 3))
1868 /* Is the else clause of an if control structure? */
1869 if (p1
- p
== 4 && !strncmp (p
, "else", 4))
1870 return else_command
;
1872 /* Check for while, if, break, continue, etc and build a new command
1873 line structure for them. */
1874 if (p1
- p
> 5 && !strncmp (p
, "while", 5))
1875 *command
= build_command_line (while_control
, p
+ 6);
1876 else if (p1
- p
> 2 && !strncmp (p
, "if", 2))
1877 *command
= build_command_line (if_control
, p
+ 3);
1878 else if (p1
- p
== 5 && !strncmp (p
, "loop_break", 5))
1880 *command
= (struct command_line
*)
1881 xmalloc (sizeof (struct command_line
));
1882 (*command
)->next
= NULL
;
1883 (*command
)->line
= NULL
;
1884 (*command
)->control_type
= break_control
;
1885 (*command
)->body_count
= 0;
1886 (*command
)->body_list
= NULL
;
1888 else if (p1
- p
== 8 && !strncmp (p
, "loop_continue", 8))
1890 *command
= (struct command_line
*)
1891 xmalloc (sizeof (struct command_line
));
1892 (*command
)->next
= NULL
;
1893 (*command
)->line
= NULL
;
1894 (*command
)->control_type
= continue_control
;
1895 (*command
)->body_count
= 0;
1896 (*command
)->body_list
= NULL
;
1900 /* A normal command. */
1901 *command
= (struct command_line
*)
1902 xmalloc (sizeof (struct command_line
));
1903 (*command
)->next
= NULL
;
1904 (*command
)->line
= savestring (p
, p1
- p
);
1905 (*command
)->control_type
= simple_control
;
1906 (*command
)->body_count
= 0;
1907 (*command
)->body_list
= NULL
;
1910 /* Nothing special. */
1914 /* Recursively read in the control structures and create a command_line
1917 The parent_control parameter is the control structure in which the
1918 following commands are nested. */
1920 static enum command_control_type
1921 recurse_read_control_structure (current_cmd
)
1922 struct command_line
*current_cmd
;
1924 int current_body
, i
;
1925 enum misc_command_type val
;
1926 enum command_control_type ret
;
1927 struct command_line
**body_ptr
, *child_tail
, *next
;
1928 struct cleanup
*old_chains
, *tmp_chains
;
1934 /* Sanity checks. */
1935 if (current_cmd
->control_type
== simple_control
)
1937 error ("Recursed on a simple control type\n");
1938 return invalid_control
;
1941 if (current_body
> current_cmd
->body_count
)
1943 error ("Allocated body is smaller than this command type needs\n");
1944 return invalid_control
;
1947 /* Read lines from the input stream and build control structures. */
1953 val
= read_next_line (&next
);
1955 /* Just skip blanks and comments. */
1956 if (val
== nop_command
)
1959 if (val
== end_command
)
1961 if (current_cmd
->control_type
== while_control
1962 || current_cmd
->control_type
== if_control
)
1964 /* Success reading an entire control structure. */
1965 ret
= simple_control
;
1970 ret
= invalid_control
;
1975 /* Not the end of a control structure. */
1976 if (val
== else_command
)
1978 if (current_cmd
->control_type
== if_control
1979 && current_body
== 1)
1981 realloc_body_list (current_cmd
, 2);
1988 ret
= invalid_control
;
1995 child_tail
->next
= next
;
1999 /* We have just read the first line of the child's control
2000 structure. From now on, arrange to throw away the line
2001 we have if we quit or get an error. */
2002 body_ptr
= current_cmd
->body_list
;
2003 for (i
= 1; i
< current_body
; i
++)
2008 tmp_chains
= make_cleanup (free_command_lines
, body_ptr
);
2011 old_chains
= tmp_chains
;
2016 /* If the latest line is another control structure, then recurse
2018 if (next
->control_type
== while_control
2019 || next
->control_type
== if_control
)
2022 ret
= recurse_read_control_structure (next
);
2025 if (ret
!= simple_control
)
2031 if (ret
== invalid_control
&& old_chains
)
2032 do_cleanups (old_chains
);
2033 else if (old_chains
)
2034 discard_cleanups (old_chains
);
2040 /* Read lines from the input stream
2041 and accumulate them in a chain of struct command_line's
2042 which is then returned. */
2044 struct command_line
*
2045 read_command_lines ()
2047 struct command_line
*head
, *tail
, *next
;
2048 struct cleanup
*old_chain
;
2049 enum command_control_type ret
;
2050 enum misc_command_type val
;
2057 val
= read_next_line (&next
);
2059 /* Ignore blank lines or comments. */
2060 if (val
== nop_command
)
2063 if (val
== end_command
)
2065 ret
= simple_control
;
2069 if (val
!= ok_command
)
2071 ret
= invalid_control
;
2075 if (next
->control_type
== while_control
2076 || next
->control_type
== if_control
)
2079 ret
= recurse_read_control_structure (next
);
2082 if (ret
== invalid_control
)
2093 old_chain
= make_cleanup (free_command_lines
, &head
);
2102 if (ret
!= invalid_control
)
2104 discard_cleanups (old_chain
);
2108 do_cleanups (old_chain
);
2114 /* Free a chain of struct command_line's. */
2117 free_command_lines (lptr
)
2118 struct command_line
**lptr
;
2120 register struct command_line
*l
= *lptr
;
2121 register struct command_line
*next
;
2122 struct command_line
**blist
;
2127 if (l
->body_count
> 0)
2129 blist
= l
->body_list
;
2130 for (i
= 0; i
< l
->body_count
; i
++, blist
++)
2131 free_command_lines (blist
);
2140 /* Add an element to the list of info subcommands. */
2143 add_info (name
, fun
, doc
)
2145 void (*fun
) PARAMS ((char *, int));
2148 add_cmd (name
, no_class
, fun
, doc
, &infolist
);
2151 /* Add an alias to the list of info subcommands. */
2154 add_info_alias (name
, oldname
, abbrev_flag
)
2159 add_alias_cmd (name
, oldname
, 0, abbrev_flag
, &infolist
);
2162 /* The "info" command is defined as a prefix, with allow_unknown = 0.
2163 Therefore, its own definition is called only for "info" with no args. */
2167 info_command (arg
, from_tty
)
2171 printf_unfiltered ("\"info\" must be followed by the name of an info command.\n");
2172 help_list (infolist
, "info ", -1, gdb_stdout
);
2175 /* The "complete" command is used by Emacs to implement completion. */
2179 complete_command (arg
, from_tty
)
2191 argpoint
= strlen (arg
);
2193 for (completion
= line_completion_function (arg
, i
= 0, arg
, argpoint
);
2195 completion
= line_completion_function (arg
, ++i
, arg
, argpoint
))
2197 printf_unfiltered ("%s\n", completion
);
2202 /* The "show" command with no arguments shows all the settings. */
2206 show_command (arg
, from_tty
)
2210 cmd_show_list (showlist
, from_tty
, "");
2213 /* Add an element to the list of commands. */
2216 add_com (name
, class, fun
, doc
)
2218 enum command_class
class;
2219 void (*fun
) PARAMS ((char *, int));
2222 add_cmd (name
, class, fun
, doc
, &cmdlist
);
2225 /* Add an alias or abbreviation command to the list of commands. */
2228 add_com_alias (name
, oldname
, class, abbrev_flag
)
2231 enum command_class
class;
2234 add_alias_cmd (name
, oldname
, class, abbrev_flag
, &cmdlist
);
2241 error ("Argument required (%s).", why
);
2246 help_command (command
, from_tty
)
2248 int from_tty
; /* Ignored */
2250 help_cmd (command
, gdb_stdout
);
2254 validate_comname (comname
)
2260 error_no_arg ("name of command to define");
2265 if (!isalnum(*p
) && *p
!= '-')
2266 error ("Junk in argument list: \"%s\"", p
);
2271 /* This is just a placeholder in the command data structures. */
2273 user_defined_command (ignore
, from_tty
)
2280 define_command (comname
, from_tty
)
2284 register struct command_line
*cmds
;
2285 register struct cmd_list_element
*c
, *newc
, *hookc
= 0;
2286 char *tem
= comname
;
2287 #define HOOK_STRING "hook-"
2290 validate_comname (comname
);
2292 /* Look it up, and verify that we got an exact match. */
2293 c
= lookup_cmd (&tem
, cmdlist
, "", -1, 1);
2294 if (c
&& !STREQ (comname
, c
->name
))
2299 if (c
->class == class_user
|| c
->class == class_alias
)
2300 tem
= "Redefine command \"%s\"? ";
2302 tem
= "Really redefine built-in command \"%s\"? ";
2303 if (!query (tem
, c
->name
))
2304 error ("Command \"%s\" not redefined.", c
->name
);
2307 /* If this new command is a hook, then mark the command which it
2308 is hooking. Note that we allow hooking `help' commands, so that
2309 we can hook the `stop' pseudo-command. */
2311 if (!strncmp (comname
, HOOK_STRING
, HOOK_LEN
))
2313 /* Look up cmd it hooks, and verify that we got an exact match. */
2314 tem
= comname
+HOOK_LEN
;
2315 hookc
= lookup_cmd (&tem
, cmdlist
, "", -1, 0);
2316 if (hookc
&& !STREQ (comname
+HOOK_LEN
, hookc
->name
))
2320 warning ("Your new `%s' command does not hook any existing command.",
2322 if (!query ("Proceed? ", (char *)0))
2323 error ("Not confirmed.");
2327 comname
= savestring (comname
, strlen (comname
));
2329 /* If the rest of the commands will be case insensitive, this one
2330 should behave in the same manner. */
2331 for (tem
= comname
; *tem
; tem
++)
2332 if (isupper(*tem
)) *tem
= tolower(*tem
);
2336 printf_unfiltered ("Type commands for definition of \"%s\".\n\
2337 End with a line saying just \"end\".\n", comname
);
2338 gdb_flush (gdb_stdout
);
2342 cmds
= read_command_lines ();
2344 if (c
&& c
->class == class_user
)
2345 free_command_lines (&c
->user_commands
);
2347 newc
= add_cmd (comname
, class_user
, user_defined_command
,
2348 (c
&& c
->class == class_user
)
2349 ? c
->doc
: savestring ("User-defined.", 13), &cmdlist
);
2350 newc
->user_commands
= cmds
;
2352 /* If this new command is a hook, then mark both commands as being
2356 hookc
->hook
= newc
; /* Target gets hooked. */
2357 newc
->hookee
= hookc
; /* We are marked as hooking target cmd. */
2362 document_command (comname
, from_tty
)
2366 struct command_line
*doclines
;
2367 register struct cmd_list_element
*c
;
2368 char *tem
= comname
;
2370 validate_comname (comname
);
2372 c
= lookup_cmd (&tem
, cmdlist
, "", 0, 1);
2374 if (c
->class != class_user
)
2375 error ("Command \"%s\" is built-in.", comname
);
2378 printf_unfiltered ("Type documentation for \"%s\".\n\
2379 End with a line saying just \"end\".\n", comname
);
2381 doclines
= read_command_lines ();
2383 if (c
->doc
) free (c
->doc
);
2386 register struct command_line
*cl1
;
2387 register int len
= 0;
2389 for (cl1
= doclines
; cl1
; cl1
= cl1
->next
)
2390 len
+= strlen (cl1
->line
) + 1;
2392 c
->doc
= (char *) xmalloc (len
+ 1);
2395 for (cl1
= doclines
; cl1
; cl1
= cl1
->next
)
2397 strcat (c
->doc
, cl1
->line
);
2399 strcat (c
->doc
, "\n");
2403 free_command_lines (&doclines
);
2407 print_gnu_advertisement ()
2409 printf_unfiltered ("\
2410 GDB is free software and you are welcome to distribute copies of it\n\
2411 under certain conditions; type \"show copying\" to see the conditions.\n\
2412 There is absolutely no warranty for GDB; type \"show warranty\" for details.\n\
2417 print_gdb_version (stream
)
2420 fprintf_filtered (stream
, "\
2421 GDB %s (%s", version
, host_name
);
2423 if (!STREQ (host_name
, target_name
))
2424 fprintf_filtered (stream
, " --target %s", target_name
);
2426 fprintf_filtered (stream
, "), ");
2428 fprintf_filtered (stream
, "Copyright 1994 Free Software Foundation, Inc.");
2433 show_version (args
, from_tty
)
2438 print_gnu_advertisement ();
2439 print_gdb_version (gdb_stdout
);
2440 printf_filtered ("\n");
2444 /* xgdb calls this to reprint the usual GDB prompt. Obsolete now that xgdb
2450 printf_unfiltered ("%s", prompt
);
2451 gdb_flush (gdb_stdout
);
2455 quit_command (args
, from_tty
)
2459 if (inferior_pid
!= 0 && target_has_execution
)
2463 if (query ("The program is running. Quit anyway (and detach it)? "))
2464 target_detach (args
, from_tty
);
2466 error ("Not confirmed.");
2470 if (query ("The program is running. Quit anyway (and kill it)? "))
2473 error ("Not confirmed.");
2476 /* UDI wants this, to kill the TIP. */
2479 /* Save the history information if it is appropriate to do so. */
2480 if (write_history_p
&& history_filename
)
2481 write_history (history_filename
);
2486 /* Returns whether GDB is running on a terminal and whether the user
2487 desires that questions be asked of them on that terminal. */
2490 input_from_terminal_p ()
2492 return gdb_has_a_terminal () && (instream
== stdin
) & caution
;
2497 pwd_command (args
, from_tty
)
2501 if (args
) error ("The \"pwd\" command does not take an argument: %s", args
);
2502 getcwd (gdb_dirbuf
, sizeof (gdb_dirbuf
));
2504 if (!STREQ (gdb_dirbuf
, current_directory
))
2505 printf_unfiltered ("Working directory %s\n (canonically %s).\n",
2506 current_directory
, gdb_dirbuf
);
2508 printf_unfiltered ("Working directory %s.\n", current_directory
);
2512 cd_command (dir
, from_tty
)
2517 /* Found something other than leading repetitions of "/..". */
2518 int found_real_path
;
2521 /* If the new directory is absolute, repeat is a no-op; if relative,
2522 repeat might be useful but is more likely to be a mistake. */
2526 error_no_arg ("new working directory");
2528 dir
= tilde_expand (dir
);
2529 make_cleanup (free
, dir
);
2531 if (chdir (dir
) < 0)
2532 perror_with_name (dir
);
2535 dir
= savestring (dir
, len
- (len
> 1 && dir
[len
-1] == '/'));
2537 current_directory
= dir
;
2540 if (current_directory
[0] == '/' && current_directory
[1] == '\0')
2541 current_directory
= concat (current_directory
, dir
, NULL
);
2543 current_directory
= concat (current_directory
, "/", dir
, NULL
);
2547 /* Now simplify any occurrences of `.' and `..' in the pathname. */
2549 found_real_path
= 0;
2550 for (p
= current_directory
; *p
;)
2552 if (p
[0] == '/' && p
[1] == '.' && (p
[2] == 0 || p
[2] == '/'))
2554 else if (p
[0] == '/' && p
[1] == '.' && p
[2] == '.'
2555 && (p
[3] == 0 || p
[3] == '/'))
2557 if (found_real_path
)
2559 /* Search backwards for the directory just before the "/.."
2560 and obliterate it and the "/..". */
2562 while (q
!= current_directory
&& q
[-1] != '/')
2565 if (q
== current_directory
)
2566 /* current_directory is
2567 a relative pathname ("can't happen"--leave it alone). */
2571 strcpy (q
- 1, p
+ 3);
2576 /* We are dealing with leading repetitions of "/..", for example
2577 "/../..", which is the Mach super-root. */
2582 found_real_path
= 1;
2587 forget_cached_source_info ();
2590 pwd_command ((char *) 0, 1);
2593 struct source_cleanup_lines_args
{
2596 char *old_pre_error
;
2597 char *old_error_pre_print
;
2601 source_cleanup_lines (args
)
2604 struct source_cleanup_lines_args
*p
=
2605 (struct source_cleanup_lines_args
*)args
;
2606 source_line_number
= p
->old_line
;
2607 source_file_name
= p
->old_file
;
2608 source_pre_error
= p
->old_pre_error
;
2609 error_pre_print
= p
->old_error_pre_print
;
2614 source_command (args
, from_tty
)
2619 struct cleanup
*old_cleanups
;
2621 struct source_cleanup_lines_args old_lines
;
2626 error ("source command requires pathname of file to source.");
2629 file
= tilde_expand (file
);
2630 old_cleanups
= make_cleanup (free
, file
);
2632 stream
= fopen (file
, FOPEN_RT
);
2634 perror_with_name (file
);
2636 make_cleanup (fclose
, stream
);
2638 old_lines
.old_line
= source_line_number
;
2639 old_lines
.old_file
= source_file_name
;
2640 old_lines
.old_pre_error
= source_pre_error
;
2641 old_lines
.old_error_pre_print
= error_pre_print
;
2642 make_cleanup (source_cleanup_lines
, &old_lines
);
2643 source_line_number
= 0;
2644 source_file_name
= file
;
2645 source_pre_error
= error_pre_print
== NULL
? "" : error_pre_print
;
2646 source_pre_error
= savestring (source_pre_error
, strlen (source_pre_error
));
2647 make_cleanup (free
, source_pre_error
);
2648 /* This will get set every time we read a line. So it won't stay "" for
2650 error_pre_print
= "";
2652 needed_length
= strlen (source_file_name
) + strlen (source_pre_error
) + 80;
2653 if (source_error_allocated
< needed_length
)
2655 source_error_allocated
*= 2;
2656 if (source_error_allocated
< needed_length
)
2657 source_error_allocated
= needed_length
;
2658 if (source_error
== NULL
)
2659 source_error
= xmalloc (source_error_allocated
);
2661 source_error
= xrealloc (source_error
, source_error_allocated
);
2664 read_command_file (stream
);
2666 do_cleanups (old_cleanups
);
2671 echo_command (text
, from_tty
)
2679 while ((c
= *p
++) != '\0')
2683 /* \ at end of argument is used after spaces
2684 so they won't be lost. */
2688 c
= parse_escape (&p
);
2690 printf_filtered ("%c", c
);
2693 printf_filtered ("%c", c
);
2696 /* Force this output to appear now. */
2698 gdb_flush (gdb_stdout
);
2702 #ifdef TARGET_BYTE_ORDER_SELECTABLE
2704 /* Functions to manipulate the endianness of the target. */
2706 #ifndef TARGET_BYTE_ORDER_DEFAULT
2707 #define TARGET_BYTE_ORDER_DEFAULT BIG_ENDIAN
2710 int target_byte_order
= TARGET_BYTE_ORDER_DEFAULT
;
2712 static int target_byte_order_auto
= 1;
2714 /* Called if the user enters ``set endian'' without an argument. */
2716 set_endian (args
, from_tty
)
2720 printf_unfiltered ("\"set endian\" must be followed by \"auto\", \"big\" or \"little\".\n");
2721 show_endian (args
, from_tty
);
2724 /* Called by ``set endian big''. */
2726 set_endian_big (args
, from_tty
)
2730 target_byte_order
= BIG_ENDIAN
;
2731 target_byte_order_auto
= 0;
2734 /* Called by ``set endian little''. */
2736 set_endian_little (args
, from_tty
)
2740 target_byte_order
= LITTLE_ENDIAN
;
2741 target_byte_order_auto
= 0;
2744 /* Called by ``set endian auto''. */
2746 set_endian_auto (args
, from_tty
)
2750 target_byte_order_auto
= 1;
2753 /* Called by ``show endian''. */
2755 show_endian (args
, from_tty
)
2760 (target_byte_order_auto
2761 ? "The target endianness is set automatically (currently %s endian)\n"
2762 : "The target is assumed to be %s endian\n");
2763 printf_unfiltered (msg
, TARGET_BYTE_ORDER
== BIG_ENDIAN
? "big" : "little");
2766 #endif /* defined (TARGET_BYTE_ORDER_SELECTABLE) */
2768 /* Set the endianness from a BFD. */
2770 set_endian_from_file (abfd
)
2773 #ifdef TARGET_BYTE_ORDER_SELECTABLE
2776 if (abfd
->xvec
->byteorder_big_p
)
2779 want
= LITTLE_ENDIAN
;
2780 if (target_byte_order_auto
)
2781 target_byte_order
= want
;
2782 else if (target_byte_order
!= want
)
2783 warning ("%s endian file does not match %s endian target.",
2784 want
== BIG_ENDIAN
? "big" : "little",
2785 TARGET_BYTE_ORDER
== BIG_ENDIAN
? "big" : "little");
2787 #else /* ! defined (TARGET_BYTE_ORDER_SELECTABLE) */
2789 if (abfd
->xvec
->byteorder_big_p
2790 ? TARGET_BYTE_ORDER
!= BIG_ENDIAN
2791 : TARGET_BYTE_ORDER
== BIG_ENDIAN
)
2792 warning ("%s endian file does not match %s endian target.",
2793 abfd
->xvec
->byteorder_big_p
? "big" : "little",
2794 TARGET_BYTE_ORDER
== BIG_ENDIAN
? "big" : "little");
2796 #endif /* ! defined (TARGET_BYTE_ORDER_SELECTABLE) */
2799 /* Functions to manipulate command line editing control variables. */
2801 /* Number of commands to print in each call to show_commands. */
2802 #define Hist_print 10
2804 show_commands (args
, from_tty
)
2808 /* Index for history commands. Relative to history_base. */
2811 /* Number of the history entry which we are planning to display next.
2812 Relative to history_base. */
2815 /* The first command in the history which doesn't exist (i.e. one more
2816 than the number of the last command). Relative to history_base. */
2819 extern HIST_ENTRY
*history_get
PARAMS ((int));
2821 /* Print out some of the commands from the command history. */
2822 /* First determine the length of the history list. */
2823 hist_len
= history_size
;
2824 for (offset
= 0; offset
< history_size
; offset
++)
2826 if (!history_get (history_base
+ offset
))
2835 if (args
[0] == '+' && args
[1] == '\0')
2836 /* "info editing +" should print from the stored position. */
2839 /* "info editing <exp>" should print around command number <exp>. */
2840 num
= (parse_and_eval_address (args
) - history_base
) - Hist_print
/ 2;
2842 /* "show commands" means print the last Hist_print commands. */
2845 num
= hist_len
- Hist_print
;
2851 /* If there are at least Hist_print commands, we want to display the last
2852 Hist_print rather than, say, the last 6. */
2853 if (hist_len
- num
< Hist_print
)
2855 num
= hist_len
- Hist_print
;
2860 for (offset
= num
; offset
< num
+ Hist_print
&& offset
< hist_len
; offset
++)
2862 printf_filtered ("%5d %s\n", history_base
+ offset
,
2863 (history_get (history_base
+ offset
))->line
);
2866 /* The next command we want to display is the next one that we haven't
2870 /* If the user repeats this command with return, it should do what
2871 "show commands +" does. This is unnecessary if arg is null,
2872 because "show commands +" is not useful after "show commands". */
2873 if (from_tty
&& args
)
2880 /* Called by do_setshow_command. */
2883 set_history_size_command (args
, from_tty
, c
)
2886 struct cmd_list_element
*c
;
2888 if (history_size
== INT_MAX
)
2889 unstifle_history ();
2890 else if (history_size
>= 0)
2891 stifle_history (history_size
);
2894 history_size
= INT_MAX
;
2895 error ("History size must be non-negative");
2901 set_history (args
, from_tty
)
2905 printf_unfiltered ("\"set history\" must be followed by the name of a history subcommand.\n");
2906 help_list (sethistlist
, "set history ", -1, gdb_stdout
);
2911 show_history (args
, from_tty
)
2915 cmd_show_list (showhistlist
, from_tty
, "");
2918 int info_verbose
= 0; /* Default verbose msgs off */
2920 /* Called by do_setshow_command. An elaborate joke. */
2923 set_verbose (args
, from_tty
, c
)
2926 struct cmd_list_element
*c
;
2928 char *cmdname
= "verbose";
2929 struct cmd_list_element
*showcmd
;
2931 showcmd
= lookup_cmd_1 (&cmdname
, showlist
, NULL
, 1);
2935 c
->doc
= "Set verbose printing of informational messages.";
2936 showcmd
->doc
= "Show verbose printing of informational messages.";
2940 c
->doc
= "Set verbosity.";
2941 showcmd
->doc
= "Show verbosity.";
2946 float_handler (signo
)
2949 /* This message is based on ANSI C, section 4.7. Note that integer
2950 divide by zero causes this, so "float" is a misnomer. */
2951 signal (SIGFPE
, float_handler
);
2952 error ("Erroneous arithmetic operation.");
2964 enablebreaklist
= NULL
;
2968 #ifdef TARGET_BYTE_ORDER_SELECTABLE
2972 showhistlist
= NULL
;
2973 unsethistlist
= NULL
;
2974 #if MAINTENANCE_CMDS
2975 maintenancelist
= NULL
;
2976 maintenanceinfolist
= NULL
;
2977 maintenanceprintlist
= NULL
;
2979 setprintlist
= NULL
;
2980 showprintlist
= NULL
;
2981 setchecklist
= NULL
;
2982 showchecklist
= NULL
;
2985 /* Init the history buffer. Note that we are called after the init file(s)
2986 * have been read so that the user can change the history file via his
2987 * .gdbinit file (for instance). The GDBHISTFILE environment variable
2988 * overrides all of this.
2996 tmpenv
= getenv ("HISTSIZE");
2998 history_size
= atoi (tmpenv
);
2999 else if (!history_size
)
3002 stifle_history (history_size
);
3004 tmpenv
= getenv ("GDBHISTFILE");
3006 history_filename
= savestring (tmpenv
, strlen(tmpenv
));
3007 else if (!history_filename
) {
3008 /* We include the current directory so that if the user changes
3009 directories the file written will be the same as the one
3011 history_filename
= concat (current_directory
, "/.gdb_history", NULL
);
3013 read_history (history_filename
);
3019 struct cmd_list_element
*c
;
3021 #ifdef TARGET_BYTE_ORDER_SELECTABLE
3023 add_prefix_cmd ("endian", class_support
, set_endian
,
3024 "Set endianness of target.",
3025 &endianlist
, "set endian ", 0, &setlist
);
3026 add_cmd ("big", class_support
, set_endian_big
,
3027 "Set target as being big endian.", &endianlist
);
3028 add_cmd ("little", class_support
, set_endian_little
,
3029 "Set target as being little endian.", &endianlist
);
3030 add_cmd ("auto", class_support
, set_endian_auto
,
3031 "Select target endianness automatically.", &endianlist
);
3032 add_cmd ("endian", class_support
, show_endian
,
3033 "Show endianness of target.", &showlist
);
3035 #endif /* defined (TARGET_BYTE_ORDER_SELECTABLE) */
3037 #ifdef DEFAULT_PROMPT
3038 prompt
= savestring (DEFAULT_PROMPT
, strlen(DEFAULT_PROMPT
));
3040 prompt
= savestring ("(gdb) ", 6);
3043 /* Set the important stuff up for command editing. */
3044 command_editing_p
= 1;
3045 history_expansion_p
= 0;
3046 write_history_p
= 0;
3048 /* Setup important stuff for command line editing. */
3049 rl_completion_entry_function
= (int (*)()) readline_line_completion_function
;
3050 rl_completer_word_break_characters
= gdb_completer_word_break_characters
;
3051 rl_completer_quote_characters
= gdb_completer_quote_characters
;
3052 rl_readline_name
= "gdb";
3054 /* Define the classes of commands.
3055 They will appear in the help list in the reverse of this order. */
3057 add_cmd ("internals", class_maintenance
, NO_FUNCTION
,
3058 "Maintenance commands.\n\
3059 Some gdb commands are provided just for use by gdb maintainers.\n\
3060 These commands are subject to frequent change, and may not be as\n\
3061 well documented as user commands.",
3063 add_cmd ("obscure", class_obscure
, NO_FUNCTION
, "Obscure features.", &cmdlist
);
3064 add_cmd ("aliases", class_alias
, NO_FUNCTION
, "Aliases of other commands.", &cmdlist
);
3065 add_cmd ("user-defined", class_user
, NO_FUNCTION
, "User-defined commands.\n\
3066 The commands in this class are those defined by the user.\n\
3067 Use the \"define\" command to define a command.", &cmdlist
);
3068 add_cmd ("support", class_support
, NO_FUNCTION
, "Support facilities.", &cmdlist
);
3069 add_cmd ("status", class_info
, NO_FUNCTION
, "Status inquiries.", &cmdlist
);
3070 add_cmd ("files", class_files
, NO_FUNCTION
, "Specifying and examining files.", &cmdlist
);
3071 add_cmd ("breakpoints", class_breakpoint
, NO_FUNCTION
, "Making program stop at certain points.", &cmdlist
);
3072 add_cmd ("data", class_vars
, NO_FUNCTION
, "Examining data.", &cmdlist
);
3073 add_cmd ("stack", class_stack
, NO_FUNCTION
, "Examining the stack.\n\
3074 The stack is made up of stack frames. Gdb assigns numbers to stack frames\n\
3075 counting from zero for the innermost (currently executing) frame.\n\n\
3076 At any time gdb identifies one frame as the \"selected\" frame.\n\
3077 Variable lookups are done with respect to the selected frame.\n\
3078 When the program being debugged stops, gdb selects the innermost frame.\n\
3079 The commands below can be used to select other frames by number or address.",
3081 add_cmd ("running", class_run
, NO_FUNCTION
, "Running the program.", &cmdlist
);
3083 add_com ("pwd", class_files
, pwd_command
,
3084 "Print working directory. This is used for your program as well.");
3085 c
= add_cmd ("cd", class_files
, cd_command
,
3086 "Set working directory to DIR for debugger and program being debugged.\n\
3087 The change does not take effect for the program being debugged\n\
3088 until the next time it is started.", &cmdlist
);
3089 c
->completer
= filename_completer
;
3092 (add_set_cmd ("prompt", class_support
, var_string
, (char *)&prompt
,
3097 add_com ("echo", class_support
, echo_command
,
3098 "Print a constant string. Give string as argument.\n\
3099 C escape sequences may be used in the argument.\n\
3100 No newline is added at the end of the argument;\n\
3101 use \"\\n\" if you want a newline to be printed.\n\
3102 Since leading and trailing whitespace are ignored in command arguments,\n\
3103 if you want to print some you must use \"\\\" before leading whitespace\n\
3104 to be printed or after trailing whitespace.");
3105 add_com ("document", class_support
, document_command
,
3106 "Document a user-defined command.\n\
3107 Give command name as argument. Give documentation on following lines.\n\
3108 End with a line of just \"end\".");
3109 add_com ("define", class_support
, define_command
,
3110 "Define a new command name. Command name is argument.\n\
3111 Definition appears on following lines, one command per line.\n\
3112 End with a line of just \"end\".\n\
3113 Use the \"document\" command to give documentation for the new command.\n\
3114 Commands defined in this way do not take arguments.");
3117 c
= add_cmd ("source", class_support
, source_command
,
3118 "Read commands from a file named FILE.\n\
3119 Note that the file \"" GDBINIT_FILENAME
"\" is read automatically in this way\n\
3120 when gdb is started.", &cmdlist
);
3122 /* Punt file name, we can't help it easily. */
3123 c
= add_cmd ("source", class_support
, source_command
,
3124 "Read commands from a file named FILE.\n\
3125 Note that the file \".gdbinit\" is read automatically in this way\n\
3126 when gdb is started.", &cmdlist
);
3128 c
->completer
= filename_completer
;
3130 add_com ("quit", class_support
, quit_command
, "Exit gdb.");
3131 add_com ("help", class_support
, help_command
, "Print list of commands.");
3132 add_com_alias ("q", "quit", class_support
, 1);
3133 add_com_alias ("h", "help", class_support
, 1);
3136 c
= add_set_cmd ("verbose", class_support
, var_boolean
, (char *)&info_verbose
,
3139 add_show_from_set (c
, &showlist
);
3140 c
->function
.sfunc
= set_verbose
;
3141 set_verbose (NULL
, 0, c
);
3144 (add_set_cmd ("editing", class_support
, var_boolean
, (char *)&command_editing_p
,
3145 "Set editing of command lines as they are typed.\n\
3146 Use \"on\" to enable to enable the editing, and \"off\" to disable it.\n\
3147 Without an argument, command line editing is enabled. To edit, use\n\
3148 EMACS-like or VI-like commands like control-P or ESC.", &setlist
),
3151 add_prefix_cmd ("history", class_support
, set_history
,
3152 "Generic command for setting command history parameters.",
3153 &sethistlist
, "set history ", 0, &setlist
);
3154 add_prefix_cmd ("history", class_support
, show_history
,
3155 "Generic command for showing command history parameters.",
3156 &showhistlist
, "show history ", 0, &showlist
);
3159 (add_set_cmd ("expansion", no_class
, var_boolean
, (char *)&history_expansion_p
,
3160 "Set history expansion on command input.\n\
3161 Without an argument, history expansion is enabled.", &sethistlist
),
3165 (add_set_cmd ("save", no_class
, var_boolean
, (char *)&write_history_p
,
3166 "Set saving of the history record on exit.\n\
3167 Use \"on\" to enable to enable the saving, and \"off\" to disable it.\n\
3168 Without an argument, saving is enabled.", &sethistlist
),
3171 c
= add_set_cmd ("size", no_class
, var_integer
, (char *)&history_size
,
3172 "Set the size of the command history, \n\
3173 ie. the number of previous commands to keep a record of.", &sethistlist
);
3174 add_show_from_set (c
, &showhistlist
);
3175 c
->function
.sfunc
= set_history_size_command
;
3178 (add_set_cmd ("filename", no_class
, var_filename
, (char *)&history_filename
,
3179 "Set the filename in which to record the command history\n\
3180 (the list of previous commands of which a record is kept).", &sethistlist
),
3184 (add_set_cmd ("confirm", class_support
, var_boolean
,
3186 "Set whether to confirm potentially dangerous operations.",
3190 add_prefix_cmd ("info", class_info
, info_command
,
3191 "Generic command for showing things about the program being debugged.",
3192 &infolist
, "info ", 0, &cmdlist
);
3193 add_com_alias ("i", "info", class_info
, 1);
3195 add_com ("complete", class_obscure
, complete_command
,
3196 "List the completions for the rest of the line as a command.");
3198 add_prefix_cmd ("show", class_info
, show_command
,
3199 "Generic command for showing things about the debugger.",
3200 &showlist
, "show ", 0, &cmdlist
);
3201 /* Another way to get at the same thing. */
3202 add_info ("set", show_command
, "Show all GDB settings.");
3204 add_cmd ("commands", no_class
, show_commands
,
3205 "Show the the history of commands you typed.\n\
3206 You can supply a command number to start with, or a `+' to start after\n\
3207 the previous command number shown.",
3210 add_cmd ("version", no_class
, show_version
,
3211 "Show what version of GDB this is.", &showlist
);
3213 add_com ("while", class_support
, while_command
,
3214 "Execute nested commands WHILE the conditional expression is non zero.\n\
3215 The conditional expression must follow the word `while' and must in turn be\
3216 followed by a new line. The nested commands must be entered one per line,\
3217 and should be terminated by the word `end'.");
3219 add_com ("if", class_support
, if_command
,
3220 "Execute nested commands once IF the conditional expression is non zero.\n\
3221 The conditional expression must follow the word `if' and must in turn be\
3222 followed by a new line. The nested commands must be entered one per line,\
3223 and should be terminated by the word 'else' or `end'. If an else clause\
3224 is used, the same rules apply to its nested commands as to the first ones.");
3226 /* If target is open when baud changes, it doesn't take effect until the
3227 next open (I think, not sure). */
3228 add_show_from_set (add_set_cmd ("remotebaud", no_class
,
3229 var_zinteger
, (char *)&baud_rate
,
3230 "Set baud rate for remote serial I/O.\n\
3231 This value is used to set the speed of the serial port when debugging\n\
3232 using remote targets.", &setlist
),
3236 add_set_cmd ("remotedebug", no_class
, var_zinteger
, (char *)&remote_debug
,
3237 "Set debugging of remote protocol.\n\
3238 When enabled, each packet sent or received with the remote target\n\
3239 is displayed.", &setlist
),