1 /* Top level stuff for GDB, the GNU debugger.
2 Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995
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 extern void initialize_targets
PARAMS ((void));
61 extern void initialize_utils
PARAMS ((void));
63 /* Prototypes for local functions */
65 static char * line_completion_function
PARAMS ((char *, int, char *, int));
67 static char * readline_line_completion_function
PARAMS ((char *, int));
69 static void command_loop_marker
PARAMS ((int));
71 static void while_command
PARAMS ((char *, int));
73 static void if_command
PARAMS ((char *, int));
75 static struct command_line
*
76 build_command_line
PARAMS ((enum command_control_type
, char *));
78 static struct command_line
*
79 get_command_line
PARAMS ((enum command_control_type
, char *));
81 static void realloc_body_list
PARAMS ((struct command_line
*, int));
83 static enum misc_command_type read_next_line
PARAMS ((struct command_line
**));
85 static enum command_control_type
86 recurse_read_control_structure
PARAMS ((struct command_line
*));
88 static struct cleanup
* setup_user_args
PARAMS ((char *));
90 static char * locate_arg
PARAMS ((char *));
92 static char * insert_args
PARAMS ((char *));
94 static void arg_cleanup
PARAMS ((void));
96 static void init_main
PARAMS ((void));
98 static void init_cmd_lists
PARAMS ((void));
100 static void float_handler
PARAMS ((int));
102 static void init_signals
PARAMS ((void));
104 static void set_verbose
PARAMS ((char *, int, struct cmd_list_element
*));
106 #ifdef TARGET_BYTE_ORDER_SELECTABLE
108 static void set_endian
PARAMS ((char *, int));
110 static void set_endian_big
PARAMS ((char *, int));
112 static void set_endian_little
PARAMS ((char *, int));
114 static void set_endian_auto
PARAMS ((char *, int));
116 static void show_endian
PARAMS ((char *, int));
120 static void show_history
PARAMS ((char *, int));
122 static void set_history
PARAMS ((char *, int));
124 static void set_history_size_command
PARAMS ((char *, int,
125 struct cmd_list_element
*));
127 static void show_commands
PARAMS ((char *, int));
129 static void echo_command
PARAMS ((char *, int));
131 static void pwd_command
PARAMS ((char *, int));
133 static void show_version
PARAMS ((char *, int));
135 static void document_command
PARAMS ((char *, int));
137 static void define_command
PARAMS ((char *, int));
139 static void validate_comname
PARAMS ((char *));
141 static void help_command
PARAMS ((char *, int));
143 static void show_command
PARAMS ((char *, int));
145 static void info_command
PARAMS ((char *, int));
147 static void complete_command
PARAMS ((char *, int));
149 static void do_nothing
PARAMS ((int));
151 static int quit_cover
PARAMS ((char *));
153 static void disconnect
PARAMS ((int));
155 static void source_cleanup
PARAMS ((FILE *));
157 /* If this definition isn't overridden by the header files, assume
158 that isatty and fileno exist on this system. */
160 #define ISATTY(FP) (isatty (fileno (FP)))
163 /* Initialization file name for gdb. This is overridden in some configs. */
165 #ifndef GDBINIT_FILENAME
166 #define GDBINIT_FILENAME ".gdbinit"
168 char gdbinit
[] = GDBINIT_FILENAME
;
170 int inhibit_gdbinit
= 0;
172 /* If nonzero, and GDB has been configured to be able to use windows,
173 attempt to open them upon startup. */
177 /* Version number of GDB, as a string. */
179 extern char *version
;
181 /* Canonical host name as a string. */
183 extern char *host_name
;
185 /* Canonical target name as a string. */
187 extern char *target_name
;
189 extern char lang_frame_mismatch_warn
[]; /* language.c */
191 /* Flag for whether we want all the "from_tty" gubbish printed. */
193 int caution
= 1; /* Default is yes, sigh. */
195 /* Define all cmd_list_elements. */
197 /* Chain containing all defined commands. */
199 struct cmd_list_element
*cmdlist
;
201 /* Chain containing all defined info subcommands. */
203 struct cmd_list_element
*infolist
;
205 /* Chain containing all defined enable subcommands. */
207 struct cmd_list_element
*enablelist
;
209 /* Chain containing all defined disable subcommands. */
211 struct cmd_list_element
*disablelist
;
213 /* Chain containing all defined delete subcommands. */
215 struct cmd_list_element
*deletelist
;
217 /* Chain containing all defined "enable breakpoint" subcommands. */
219 struct cmd_list_element
*enablebreaklist
;
221 /* Chain containing all defined set subcommands */
223 struct cmd_list_element
*setlist
;
225 /* Chain containing all defined unset subcommands */
227 struct cmd_list_element
*unsetlist
;
229 /* Chain containing all defined show subcommands. */
231 struct cmd_list_element
*showlist
;
233 #ifdef TARGET_BYTE_ORDER_SELECTABLE
234 /* Chain containing the \"set endian\" commands. */
236 struct cmd_list_element
*endianlist
;
239 /* Chain containing all defined \"set history\". */
241 struct cmd_list_element
*sethistlist
;
243 /* Chain containing all defined \"show history\". */
245 struct cmd_list_element
*showhistlist
;
247 /* Chain containing all defined \"unset history\". */
249 struct cmd_list_element
*unsethistlist
;
251 /* Chain containing all defined maintenance subcommands. */
254 struct cmd_list_element
*maintenancelist
;
257 /* Chain containing all defined "maintenance info" subcommands. */
260 struct cmd_list_element
*maintenanceinfolist
;
263 /* Chain containing all defined "maintenance print" subcommands. */
266 struct cmd_list_element
*maintenanceprintlist
;
269 struct cmd_list_element
*setprintlist
;
271 struct cmd_list_element
*showprintlist
;
273 struct cmd_list_element
*setchecklist
;
275 struct cmd_list_element
*showchecklist
;
277 /* stdio stream that command input is being read from. Set to stdin normally.
278 Set by source_command to the file we are sourcing. Set to NULL if we are
279 executing a user-defined command. */
283 /* Current working directory. */
285 char *current_directory
;
287 /* The directory name is actually stored here (usually). */
288 char gdb_dirbuf
[1024];
290 /* Function to call before reading a command, if nonzero.
291 The function receives two args: an input stream,
292 and a prompt string. */
294 void (*window_hook
) PARAMS ((FILE *, char *));
299 /* gdb prints this when reading a command interactively */
302 /* Buffer used for reading command lines, and the size
303 allocated for it so far. */
308 /* Nonzero if the current command is modified by "server ". This
309 affects things like recording into the command history, comamnds
310 repeating on RETURN, etc. This is so a user interface (emacs, GUI,
311 whatever) can issue its own commands and also send along commands
312 from the user, and have the user not notice that the user interface
313 is issuing commands too. */
316 /* Baud rate specified for talking to serial target systems. Default
317 is left as -1, so targets can choose their own defaults. */
318 /* FIXME: This means that "show remotebaud" and gr_files_info can print -1
319 or (unsigned int)-1. This is a Bad User Interface. */
323 /* Non-zero tells remote* modules to output debugging info. */
325 int remote_debug
= 0;
327 /* Level of control structure. */
328 static int control_level
;
330 /* Structure for arguments to user defined functions. */
331 #define MAXUSERARGS 10
334 struct user_args
*next
;
343 /* Signal to catch ^Z typed while reading a command: SIGTSTP or SIGCONT. */
347 #define STOP_SIGNAL SIGTSTP
348 static void stop_sig
PARAMS ((int));
352 /* Some System V have job control but not sigsetmask(). */
353 #if !defined (HAVE_SIGSETMASK)
355 #define HAVE_SIGSETMASK 1
357 #define HAVE_SIGSETMASK 0
361 #if 0 == (HAVE_SIGSETMASK)
362 #define sigsetmask(n)
365 /* Hooks for alternate command interfaces. */
367 /* Called after most modules have been initialized, but before taking users
370 void (*init_ui_hook
) PARAMS ((void));
372 /* Called instead of command_loop at top level. Can be invoked via
373 return_to_top_level. */
375 void (*command_loop_hook
) PARAMS ((void));
377 /* Called instead of fputs for all output. */
379 void (*fputs_unfiltered_hook
) PARAMS ((const char *linebuffer
, FILE *stream
));
381 /* Called from print_frame_info to list the line we stopped in. */
383 void (*print_frame_info_listing_hook
) PARAMS ((struct symtab
*s
, int line
,
384 int stopline
, int noerror
));
385 /* Replaces most of query. */
387 int (*query_hook
) PARAMS (());
389 /* Called from gdb_flush to flush output. */
391 void (*flush_hook
) PARAMS ((FILE *stream
));
393 /* Called as appropriate to notify the interface of the specified breakpoint
396 void (*create_breakpoint_hook
) PARAMS ((struct breakpoint
*bpt
));
397 void (*delete_breakpoint_hook
) PARAMS ((struct breakpoint
*bpt
));
398 void (*modify_breakpoint_hook
) PARAMS ((struct breakpoint
*bpt
));
400 /* Called during long calculations to allow GUI to repair window damage, and to
401 check for stop buttons, etc... */
403 void (*interactive_hook
) PARAMS ((void));
405 /* Called when the registers have changed, as a hint to a GUI
406 to minimize window update. */
408 void (*registers_changed_hook
) PARAMS ((void));
410 /* Called when going to wait for the target. Usually allows the GUI to run
411 while waiting for target events. */
413 int (*target_wait_hook
) PARAMS ((int pid
, struct target_waitstatus
*status
));
415 /* Used by UI as a wrapper around command execution. May do various things
416 like enabling/disabling buttons, etc... */
418 void (*call_command_hook
) PARAMS ((struct cmd_list_element
*c
, char *cmd
,
421 /* Takes control from error (). Typically used to prevent longjmps out of the
422 middle of the GUI. Usually used in conjunction with a catch routine. */
424 NORETURN
void (*error_hook
) PARAMS (());
427 /* Where to go for return_to_top_level (RETURN_ERROR). */
428 jmp_buf error_return
;
429 /* Where to go for return_to_top_level (RETURN_QUIT). */
432 /* Return for reason REASON. This generally gets back to the command
433 loop, but can be caught via catch_errors. */
436 return_to_top_level (reason
)
437 enum return_reason reason
;
442 /* Perhaps it would be cleaner to do this via the cleanup chain (not sure
443 I can think of a reason why that is vital, though). */
444 bpstat_clear_actions(stop_bpstat
); /* Clear queued breakpoint commands */
446 disable_current_display ();
447 do_cleanups (ALL_CLEANUPS
);
449 if (annotation_level
> 1)
460 (NORETURN
void) longjmp
461 (reason
== RETURN_ERROR
? error_return
: quit_return
, 1);
464 /* Call FUNC with arg ARGS, catching any errors. If there is no
465 error, return the value returned by FUNC. If there is an error,
466 print ERRSTRING, print the specific error message, then return
469 Must not be called with immediate_quit in effect (bad things might
470 happen, say we got a signal in the middle of a memcpy to quit_return).
471 This is an OK restriction; with very few exceptions immediate_quit can
472 be replaced by judicious use of QUIT.
474 MASK specifies what to catch; it is normally set to
475 RETURN_MASK_ALL, if for no other reason than that the code which
476 calls catch_errors might not be set up to deal with a quit which
477 isn't caught. But if the code can deal with it, it generally
478 should be RETURN_MASK_ERROR, unless for some reason it is more
479 useful to abort only the portion of the operation inside the
480 catch_errors. Note that quit should return to the command line
481 fairly quickly, even if some further processing is being done. */
484 catch_errors (func
, args
, errstring
, mask
)
485 int (*func
) PARAMS ((char *));
494 struct cleanup
*saved_cleanup_chain
;
495 char *saved_error_pre_print
;
497 saved_cleanup_chain
= save_cleanups ();
498 saved_error_pre_print
= error_pre_print
;
500 if (mask
& RETURN_MASK_ERROR
)
501 memcpy ((char *)saved_error
, (char *)error_return
, sizeof (jmp_buf));
502 if (mask
& RETURN_MASK_QUIT
)
503 memcpy (saved_quit
, quit_return
, sizeof (jmp_buf));
504 error_pre_print
= errstring
;
506 if (setjmp (tmp_jmp
) == 0)
508 if (mask
& RETURN_MASK_ERROR
)
509 memcpy (error_return
, tmp_jmp
, sizeof (jmp_buf));
510 if (mask
& RETURN_MASK_QUIT
)
511 memcpy (quit_return
, tmp_jmp
, sizeof (jmp_buf));
512 val
= (*func
) (args
);
517 restore_cleanups (saved_cleanup_chain
);
519 error_pre_print
= saved_error_pre_print
;
520 if (mask
& RETURN_MASK_ERROR
)
521 memcpy (error_return
, saved_error
, sizeof (jmp_buf));
522 if (mask
& RETURN_MASK_QUIT
)
523 memcpy (quit_return
, saved_quit
, sizeof (jmp_buf));
527 /* Handler for SIGHUP. */
533 catch_errors (quit_cover
, NULL
,
534 "Could not kill the program being debugged", RETURN_MASK_ALL
);
535 signal (SIGHUP
, SIG_DFL
);
536 kill (getpid (), SIGHUP
);
539 /* Just a little helper function for disconnect(). */
545 caution
= 0; /* Throw caution to the wind -- we're exiting.
546 This prevents asking the user dumb questions. */
547 quit_command((char *)0, 0);
551 /* Line number we are currently in in a file which is being sourced. */
552 static int source_line_number
;
554 /* Name of the file we are sourcing. */
555 static char *source_file_name
;
557 /* Buffer containing the error_pre_print used by the source stuff.
559 static char *source_error
;
560 static int source_error_allocated
;
562 /* Something to glom on to the start of error_pre_print if source_file_name
564 static char *source_pre_error
;
566 /* Clean up on error during a "source" command (or execution of a
567 user-defined command). */
570 source_cleanup (stream
)
573 /* Restore the previous input stream. */
577 /* Read commands from STREAM. */
579 read_command_file (stream
)
582 struct cleanup
*cleanups
;
584 cleanups
= make_cleanup (source_cleanup
, instream
);
587 do_cleanups (cleanups
);
590 extern void init_proc ();
592 void (*pre_init_ui_hook
) PARAMS ((void));
597 if (pre_init_ui_hook
)
600 /* Run the init function of each source file */
602 getcwd (gdb_dirbuf
, sizeof (gdb_dirbuf
));
603 current_directory
= gdb_dirbuf
;
605 init_cmd_lists (); /* This needs to be done first */
606 initialize_targets (); /* Setup target_terminal macros for utils.c */
607 initialize_utils (); /* Make errors and warnings possible */
608 initialize_all_files ();
609 init_main (); /* But that omits this file! Do it now */
614 /* We need a default language for parsing expressions, so simple things like
615 "set width 0" won't fail if no language is explicitly set in a config file
616 or implicitly set by reading an executable during startup. */
617 set_language (language_c
);
618 expected_language
= current_language
; /* don't warn about the change. */
624 /* Allocate, initialize a new command line structure for one of the
625 control commands (if/while). */
627 static struct command_line
*
628 build_command_line (type
, args
)
629 enum command_control_type type
;
632 struct command_line
*cmd
;
634 cmd
= (struct command_line
*)xmalloc (sizeof (struct command_line
));
636 cmd
->control_type
= type
;
640 = (struct command_line
**)xmalloc (sizeof (struct command_line
*)
642 memset (cmd
->body_list
, 0, sizeof (struct command_line
*) * cmd
->body_count
);
643 cmd
->line
= savestring (args
, strlen (args
));
647 /* Build and return a new command structure for the control commands
648 such as "if" and "while". */
650 static struct command_line
*
651 get_command_line (type
, arg
)
652 enum command_control_type type
;
655 struct command_line
*cmd
;
656 struct cleanup
*old_chain
= NULL
;
658 /* Allocate and build a new command line structure. */
659 cmd
= build_command_line (type
, arg
);
661 old_chain
= make_cleanup (free_command_lines
, &cmd
);
663 /* Read in the body of this command. */
664 if (recurse_read_control_structure (cmd
) == invalid_control
)
666 warning ("error reading in control structure\n");
667 do_cleanups (old_chain
);
671 discard_cleanups (old_chain
);
675 /* Recursively print a command (including full control structures). */
677 print_command_line (cmd
, depth
)
678 struct command_line
*cmd
;
685 for (i
= 0; i
< depth
; i
++)
686 fputs_filtered (" ", gdb_stdout
);
689 /* A simple command, print it and return. */
690 if (cmd
->control_type
== simple_control
)
692 fputs_filtered (cmd
->line
, gdb_stdout
);
693 fputs_filtered ("\n", gdb_stdout
);
697 /* loop_continue to jump to the start of a while loop, print it
699 if (cmd
->control_type
== continue_control
)
701 fputs_filtered ("loop_continue\n", gdb_stdout
);
705 /* loop_break to break out of a while loop, print it and return. */
706 if (cmd
->control_type
== break_control
)
708 fputs_filtered ("loop_break\n", gdb_stdout
);
712 /* A while command. Recursively print its subcommands before returning. */
713 if (cmd
->control_type
== while_control
)
715 struct command_line
*list
;
716 fputs_filtered ("while ", gdb_stdout
);
717 fputs_filtered (cmd
->line
, gdb_stdout
);
718 fputs_filtered ("\n", gdb_stdout
);
719 list
= *cmd
->body_list
;
722 print_command_line (list
, depth
+ 1);
727 /* An if command. Recursively print both arms before returning. */
728 if (cmd
->control_type
== if_control
)
730 fputs_filtered ("if ", gdb_stdout
);
731 fputs_filtered (cmd
->line
, gdb_stdout
);
732 fputs_filtered ("\n", gdb_stdout
);
734 print_command_line (cmd
->body_list
[0], depth
+ 1);
736 /* Show the false arm if it exists. */
737 if (cmd
->body_count
== 2)
741 for (i
= 0; i
< depth
; i
++)
742 fputs_filtered (" ", gdb_stdout
);
744 fputs_filtered ("else\n", gdb_stdout
);
745 print_command_line (cmd
->body_list
[1], depth
+ 1);
749 for (i
= 0; i
< depth
; i
++)
750 fputs_filtered (" ", gdb_stdout
);
752 fputs_filtered ("end\n", gdb_stdout
);
756 /* Execute the command in CMD. */
758 enum command_control_type
759 execute_control_command (cmd
)
760 struct command_line
*cmd
;
762 struct expression
*expr
;
763 struct command_line
*current
;
764 struct cleanup
*old_chain
= 0;
767 enum command_control_type ret
;
770 switch (cmd
->control_type
)
773 /* A simple command, execute it and return. */
774 new_line
= insert_args (cmd
->line
);
776 return invalid_control
;
777 old_chain
= make_cleanup (free_current_contents
, &new_line
);
778 execute_command (new_line
, 0);
779 ret
= cmd
->control_type
;
782 case continue_control
:
784 /* Return for "continue", and "break" so we can either
785 continue the loop at the top, or break out. */
786 ret
= cmd
->control_type
;
791 /* Parse the loop control expression for the while statement. */
792 new_line
= insert_args (cmd
->line
);
794 return invalid_control
;
795 old_chain
= make_cleanup (free_current_contents
, &new_line
);
796 expr
= parse_expression (new_line
);
797 make_cleanup (free_current_contents
, &expr
);
799 ret
= simple_control
;
802 /* Keep iterating so long as the expression is true. */
805 /* Evaluate the expression. */
806 val
= evaluate_expression (expr
);
808 /* If the value is false, then break out of the loop. */
809 if (!value_true (val
))
812 /* Execute the body of the while statement. */
813 current
= *cmd
->body_list
;
816 ret
= execute_control_command (current
);
818 /* If we got an error, or a "break" command, then stop
820 if (ret
== invalid_control
|| ret
== break_control
)
826 /* If we got a "continue" command, then restart the loop
828 if (ret
== continue_control
)
831 /* Get the next statement. */
832 current
= current
->next
;
836 /* Reset RET so that we don't recurse the break all the way down. */
837 if (ret
== break_control
)
838 ret
= simple_control
;
845 new_line
= insert_args (cmd
->line
);
847 return invalid_control
;
848 old_chain
= make_cleanup (free_current_contents
, &new_line
);
849 /* Parse the conditional for the if statement. */
850 expr
= parse_expression (new_line
);
851 make_cleanup (free_current_contents
, &expr
);
854 ret
= simple_control
;
856 /* Evaluate the conditional. */
857 val
= evaluate_expression (expr
);
859 /* Choose which arm to take commands from based on the value of the
860 conditional expression. */
861 if (value_true (val
))
862 current
= *cmd
->body_list
;
863 else if (cmd
->body_count
== 2)
864 current
= *(cmd
->body_list
+ 1);
866 /* Execute commands in the given arm. */
869 ret
= execute_control_command (current
);
871 /* If we got an error, get out. */
872 if (ret
!= simple_control
)
875 /* Get the next statement in the body. */
876 current
= current
->next
;
883 warning ("Invalid control type in command structure.");
884 return invalid_control
;
888 do_cleanups (old_chain
);
893 /* "while" command support. Executes a body of statements while the
894 loop condition is nonzero. */
897 while_command (arg
, from_tty
)
901 struct command_line
*command
= NULL
;
904 command
= get_command_line (while_control
, arg
);
909 execute_control_command (command
);
910 free_command_lines (&command
);
913 /* "if" command support. Execute either the true or false arm depending
914 on the value of the if conditional. */
917 if_command (arg
, from_tty
)
921 struct command_line
*command
= NULL
;
924 command
= get_command_line (if_control
, arg
);
929 execute_control_command (command
);
930 free_command_lines (&command
);
937 struct user_args
*oargs
= user_args
;
939 fatal ("Internal error, arg_cleanup called with no user args.\n");
941 user_args
= user_args
->next
;
945 /* Bind the incomming arguments for a user defined command to
946 $arg0, $arg1 ... $argMAXUSERARGS. */
948 static struct cleanup
*
952 struct user_args
*args
;
953 struct cleanup
*old_chain
;
954 unsigned int arg_count
= 0;
956 args
= (struct user_args
*)xmalloc (sizeof (struct user_args
));
957 memset (args
, 0, sizeof (struct user_args
));
959 args
->next
= user_args
;
962 old_chain
= make_cleanup (arg_cleanup
, 0);
971 if (arg_count
>= MAXUSERARGS
)
973 error ("user defined function may only have %d arguments.\n",
978 /* Strip whitespace. */
979 while (*p
== ' ' || *p
== '\t')
982 /* P now points to an argument. */
984 user_args
->a
[arg_count
].arg
= p
;
986 /* Get to the end of this argument. */
987 while (*p
&& *p
!= ' ' && *p
!= '\t')
990 user_args
->a
[arg_count
].len
= p
- start_arg
;
997 /* Given character string P, return a point to the first argument ($arg),
998 or NULL if P contains no arguments. */
1004 while ((p
= strchr (p
, '$')))
1006 if (strncmp (p
, "$arg", 4) == 0 && isdigit (p
[4]))
1013 /* Insert the user defined arguments stored in user_arg into the $arg
1014 arguments found in line, with the updated copy being placed into nline. */
1020 char *p
, *save_line
, *new_line
;
1023 /* First we need to know how much memory to allocate for the new line. */
1026 while ((p
= locate_arg (line
)))
1031 if (i
>= user_args
->count
)
1033 error ("Missing argument %d in user function.\n", i
);
1036 len
+= user_args
->a
[i
].len
;
1040 /* Don't forget the tail. */
1041 len
+= strlen (line
);
1043 /* Allocate space for the new line and fill it in. */
1044 new_line
= (char *)xmalloc (len
+ 1);
1045 if (new_line
== NULL
)
1048 /* Restore pointer to beginning of old line. */
1051 /* Save pointer to beginning of new line. */
1052 save_line
= new_line
;
1054 while ((p
= locate_arg (line
)))
1058 memcpy (new_line
, line
, p
- line
);
1059 new_line
+= p
- line
;
1062 len
= user_args
->a
[i
].len
;
1065 memcpy (new_line
, user_args
->a
[i
].arg
, len
);
1070 /* Don't forget the tail. */
1071 strcpy (new_line
, line
);
1073 /* Return a pointer to the beginning of the new line. */
1078 execute_user_command (c
, args
)
1079 struct cmd_list_element
*c
;
1082 register struct command_line
*cmdlines
;
1083 struct cleanup
*old_chain
;
1084 enum command_control_type ret
;
1086 old_chain
= setup_user_args (args
);
1088 cmdlines
= c
->user_commands
;
1093 /* Set the instream to 0, indicating execution of a
1094 user-defined function. */
1095 old_chain
= make_cleanup (source_cleanup
, instream
);
1096 instream
= (FILE *) 0;
1099 ret
= execute_control_command (cmdlines
);
1100 if (ret
!= simple_control
&& ret
!= break_control
)
1102 warning ("Error in control structure.\n");
1105 cmdlines
= cmdlines
->next
;
1107 do_cleanups (old_chain
);
1110 /* Execute the line P as a command.
1111 Pass FROM_TTY as second argument to the defining function. */
1114 execute_command (p
, from_tty
)
1118 register struct cmd_list_element
*c
;
1119 register enum language flang
;
1120 static int warned
= 0;
1124 /* This can happen when command_line_input hits end of file. */
1128 while (*p
== ' ' || *p
== '\t') p
++;
1133 c
= lookup_cmd (&p
, cmdlist
, "", 0, 1);
1134 /* Pass null arg rather than an empty one. */
1137 /* If this command has been hooked, run the hook first. */
1139 execute_user_command (c
->hook
, (char *)0);
1141 if (c
->class == class_user
)
1142 execute_user_command (c
, arg
);
1143 else if (c
->type
== set_cmd
|| c
->type
== show_cmd
)
1144 do_setshow_command (arg
, from_tty
& caution
, c
);
1145 else if (c
->function
.cfunc
== NO_FUNCTION
)
1146 error ("That is not a command, just a help topic.");
1147 else if (call_command_hook
)
1148 call_command_hook (c
, arg
, from_tty
& caution
);
1150 (*c
->function
.cfunc
) (arg
, from_tty
& caution
);
1153 /* Tell the user if the language has changed (except first time). */
1154 if (current_language
!= expected_language
)
1156 if (language_mode
== language_mode_auto
) {
1157 language_info (1); /* Print what changed. */
1162 /* Warn the user if the working language does not match the
1163 language of the current frame. Only warn the user if we are
1164 actually running the program, i.e. there is a stack. */
1165 /* FIXME: This should be cacheing the frame and only running when
1166 the frame changes. */
1168 if (target_has_stack
)
1170 flang
= get_frame_language ();
1172 && flang
!= language_unknown
1173 && flang
!= current_language
->la_language
)
1175 printf_filtered ("%s\n", lang_frame_mismatch_warn
);
1183 command_loop_marker (foo
)
1188 /* Read commands from `instream' and execute them
1189 until end of file or error reading instream. */
1194 struct cleanup
*old_chain
;
1196 int stdin_is_tty
= ISATTY (stdin
);
1197 long time_at_cmd_start
;
1198 long space_at_cmd_start
;
1199 extern int display_time
;
1200 extern int display_space
;
1202 while (!feof (instream
))
1204 if (window_hook
&& instream
== stdin
)
1205 (*window_hook
) (instream
, prompt
);
1208 if (instream
== stdin
&& stdin_is_tty
)
1209 reinitialize_more_filter ();
1210 old_chain
= make_cleanup (command_loop_marker
, 0);
1211 command
= command_line_input (instream
== stdin
? prompt
: (char *) NULL
,
1212 instream
== stdin
, "prompt");
1216 time_at_cmd_start
= get_run_time ();
1220 extern char **environ
;
1221 char *lim
= (char *) sbrk (0);
1223 space_at_cmd_start
= (long) (lim
- (char *) &environ
);
1226 execute_command (command
, instream
== stdin
);
1227 /* Do any commands attached to breakpoint we stopped at. */
1228 bpstat_do_actions (&stop_bpstat
);
1229 do_cleanups (old_chain
);
1233 long cmd_time
= get_run_time () - time_at_cmd_start
;
1235 printf_unfiltered ("Command execution time: %ld.%06ld\n",
1236 cmd_time
/ 1000000, cmd_time
% 1000000);
1241 extern char **environ
;
1242 char *lim
= (char *) sbrk (0);
1243 long space_now
= lim
- (char *) &environ
;
1244 long space_diff
= space_now
- space_at_cmd_start
;
1246 printf_unfiltered ("Space used: %ld (%c%ld for this command)\n",
1248 (space_diff
>= 0 ? '+' : '-'),
1254 /* Commands call this if they do not want to be repeated by null lines. */
1262 /* If we aren't reading from standard input, we are saving the last
1263 thing read from stdin in line and don't want to delete it. Null lines
1264 won't repeat here in any case. */
1265 if (instream
== stdin
)
1269 /* Read a line from the stream "instream" without command line editing.
1271 It prints PRROMPT once at the start.
1272 Action is compatible with "readline", e.g. space for the result is
1273 malloc'd and should be freed by the caller.
1275 A NULL return means end of file. */
1277 gdb_readline (prrompt
)
1282 int input_index
= 0;
1283 int result_size
= 80;
1287 /* Don't use a _filtered function here. It causes the assumed
1288 character position to be off, since the newline we read from
1289 the user is not accounted for. */
1290 fputs_unfiltered (prrompt
, gdb_stdout
);
1291 /* start-sanitize-mpw */
1293 /* Move to a new line so the entered line doesn't have a prompt
1294 on the front of it. */
1295 fputs_unfiltered ("\n", gdb_stdout
);
1297 /* end-sanitize-mpw */
1298 gdb_flush (gdb_stdout
);
1301 result
= (char *) xmalloc (result_size
);
1305 /* Read from stdin if we are executing a user defined command.
1306 This is the right thing for prompt_for_continue, at least. */
1307 c
= fgetc (instream
? instream
: stdin
);
1311 if (input_index
> 0)
1312 /* The last line does not end with a newline. Return it, and
1313 if we are called again fgetc will still return EOF and
1314 we'll return NULL then. */
1323 result
[input_index
++] = c
;
1324 while (input_index
>= result_size
)
1327 result
= (char *) xrealloc (result
, result_size
);
1331 result
[input_index
++] = '\0';
1335 /* Variables which control command line editing and history
1336 substitution. These variables are given default values at the end
1338 static int command_editing_p
;
1339 static int history_expansion_p
;
1340 static int write_history_p
;
1341 static int history_size
;
1342 static char *history_filename
;
1344 /* readline uses the word breaks for two things:
1345 (1) In figuring out where to point the TEXT parameter to the
1346 rl_completion_entry_function. Since we don't use TEXT for much,
1347 it doesn't matter a lot what the word breaks are for this purpose, but
1348 it does affect how much stuff M-? lists.
1349 (2) If one of the matches contains a word break character, readline
1350 will quote it. That's why we switch between
1351 gdb_completer_word_break_characters and
1352 gdb_completer_command_word_break_characters. I'm not sure when
1353 we need this behavior (perhaps for funky characters in C++ symbols?). */
1355 /* Variables which are necessary for fancy command line editing. */
1356 char *gdb_completer_word_break_characters
=
1357 " \t\n!@#$%^&*()+=|~`}{[]\"';:?/>.<,-";
1359 /* When completing on command names, we remove '-' from the list of
1360 word break characters, since we use it in command names. If the
1361 readline library sees one in any of the current completion strings,
1362 it thinks that the string needs to be quoted and automatically supplies
1364 char *gdb_completer_command_word_break_characters
=
1365 " \t\n!@#$%^&*()+=|~`}{[]\"';:?/>.<,";
1367 /* Characters that can be used to quote completion strings. Note that we
1368 can't include '"' because the gdb C parser treats such quoted sequences
1370 char *gdb_completer_quote_characters
=
1373 /* Functions that are used as part of the fancy command line editing. */
1375 /* This can be used for functions which don't want to complete on symbols
1376 but don't want to complete on anything else either. */
1379 noop_completer (text
, prefix
)
1386 /* Complete on filenames. */
1388 filename_completer (text
, word
)
1392 /* From readline. */
1393 extern char *filename_completion_function ();
1394 int subsequent_name
;
1396 int return_val_used
;
1397 int return_val_alloced
;
1399 return_val_used
= 0;
1400 /* Small for testing. */
1401 return_val_alloced
= 1;
1402 return_val
= (char **) xmalloc (return_val_alloced
* sizeof (char *));
1404 subsequent_name
= 0;
1408 p
= filename_completion_function (text
, subsequent_name
);
1409 if (return_val_used
>= return_val_alloced
)
1411 return_val_alloced
*= 2;
1413 (char **) xrealloc (return_val
,
1414 return_val_alloced
* sizeof (char *));
1418 return_val
[return_val_used
++] = p
;
1421 /* Like emacs, don't complete on old versions. Especially useful
1422 in the "source" command. */
1423 if (p
[strlen (p
) - 1] == '~')
1429 /* Return exactly p. */
1430 return_val
[return_val_used
++] = p
;
1431 else if (word
> text
)
1433 /* Return some portion of p. */
1434 q
= xmalloc (strlen (p
) + 5);
1435 strcpy (q
, p
+ (word
- text
));
1436 return_val
[return_val_used
++] = q
;
1441 /* Return some of TEXT plus p. */
1442 q
= xmalloc (strlen (p
) + (text
- word
) + 5);
1443 strncpy (q
, word
, text
- word
);
1444 q
[text
- word
] = '\0';
1446 return_val
[return_val_used
++] = q
;
1450 subsequent_name
= 1;
1453 /* There is no way to do this just long enough to affect quote inserting
1454 without also affecting the next completion. This should be fixed in
1456 /* Insure that readline does the right thing
1457 with respect to inserting quotes. */
1458 rl_completer_word_break_characters
= "";
1463 /* Here are some useful test cases for completion. FIXME: These should
1464 be put in the test suite. They should be tested with both M-? and TAB.
1466 "show output-" "radix"
1467 "show output" "-radix"
1468 "p" ambiguous (commands starting with p--path, print, printf, etc.)
1469 "p " ambiguous (all symbols)
1470 "info t foo" no completions
1471 "info t " no completions
1472 "info t" ambiguous ("info target", "info terminal", etc.)
1473 "info ajksdlfk" no completions
1474 "info ajksdlfk " no completions
1476 "info " ambiguous (all info commands)
1477 "p \"a" no completions (string constant)
1478 "p 'a" ambiguous (all symbols starting with a)
1479 "p b-a" ambiguous (all symbols starting with a)
1480 "p b-" ambiguous (all symbols)
1481 "file Make" "file" (word break hard to screw up here)
1482 "file ../gdb.stabs/we" "ird" (needs to not break word at slash)
1485 /* Generate completions one by one for the completer. Each time we are
1486 called return another potential completion to the caller.
1487 line_completion just completes on commands or passes the buck to the
1488 command's completer function, the stuff specific to symbol completion
1489 is in make_symbol_completion_list.
1491 TEXT is the caller's idea of the "word" we are looking at.
1493 MATCHES is the number of matches that have currently been collected from
1494 calling this completion function. When zero, then we need to initialize,
1495 otherwise the initialization has already taken place and we can just
1496 return the next potential completion string.
1498 LINE_BUFFER is available to be looked at; it contains the entire text
1499 of the line. POINT is the offset in that line of the cursor. You
1500 should pretend that the line ends at POINT.
1502 Returns NULL if there are no more completions, else a pointer to a string
1503 which is a possible completion, it is the caller's responsibility to
1507 line_completion_function (text
, matches
, line_buffer
, point
)
1513 static char **list
= (char **)NULL
; /* Cache of completions */
1514 static int index
; /* Next cached completion */
1515 char *output
= NULL
;
1516 char *tmp_command
, *p
;
1517 /* Pointer within tmp_command which corresponds to text. */
1519 struct cmd_list_element
*c
, *result_list
;
1523 /* The caller is beginning to accumulate a new set of completions, so
1524 we need to find all of them now, and cache them for returning one at
1525 a time on future calls. */
1529 /* Free the storage used by LIST, but not by the strings inside.
1530 This is because rl_complete_internal () frees the strings. */
1536 /* Choose the default set of word break characters to break completions.
1537 If we later find out that we are doing completions on command strings
1538 (as opposed to strings supplied by the individual command completer
1539 functions, which can be any string) then we will switch to the
1540 special word break set for command strings, which leaves out the
1541 '-' character used in some commands. */
1543 rl_completer_word_break_characters
=
1544 gdb_completer_word_break_characters
;
1546 /* Decide whether to complete on a list of gdb commands or on symbols. */
1547 tmp_command
= (char *) alloca (point
+ 1);
1550 strncpy (tmp_command
, line_buffer
, point
);
1551 tmp_command
[point
] = '\0';
1552 /* Since text always contains some number of characters leading up
1553 to point, we can find the equivalent position in tmp_command
1554 by subtracting that many characters from the end of tmp_command. */
1555 word
= tmp_command
+ point
- strlen (text
);
1559 /* An empty line we want to consider ambiguous; that is, it
1560 could be any command. */
1561 c
= (struct cmd_list_element
*) -1;
1566 c
= lookup_cmd_1 (&p
, cmdlist
, &result_list
, 1);
1569 /* Move p up to the next interesting thing. */
1570 while (*p
== ' ' || *p
== '\t')
1577 /* It is an unrecognized command. So there are no
1578 possible completions. */
1581 else if (c
== (struct cmd_list_element
*) -1)
1585 /* lookup_cmd_1 advances p up to the first ambiguous thing, but
1586 doesn't advance over that thing itself. Do so now. */
1588 while (*q
&& (isalnum (*q
) || *q
== '-' || *q
== '_'))
1590 if (q
!= tmp_command
+ point
)
1592 /* There is something beyond the ambiguous
1593 command, so there are no possible completions. For
1594 example, "info t " or "info t foo" does not complete
1595 to anything, because "info t" can be "info target" or
1601 /* We're trying to complete on the command which was ambiguous.
1602 This we can deal with. */
1605 list
= complete_on_cmdlist (*result_list
->prefixlist
, p
,
1610 list
= complete_on_cmdlist (cmdlist
, p
, word
);
1612 /* Insure that readline does the right thing with respect to
1613 inserting quotes. */
1614 rl_completer_word_break_characters
=
1615 gdb_completer_command_word_break_characters
;
1620 /* We've recognized a full command. */
1622 if (p
== tmp_command
+ point
)
1624 /* There is no non-whitespace in the line beyond the command. */
1626 if (p
[-1] == ' ' || p
[-1] == '\t')
1628 /* The command is followed by whitespace; we need to complete
1629 on whatever comes after command. */
1632 /* It is a prefix command; what comes after it is
1633 a subcommand (e.g. "info "). */
1634 list
= complete_on_cmdlist (*c
->prefixlist
, p
, word
);
1636 /* Insure that readline does the right thing
1637 with respect to inserting quotes. */
1638 rl_completer_word_break_characters
=
1639 gdb_completer_command_word_break_characters
;
1643 list
= complete_on_enum (c
->enums
, p
, word
);
1644 rl_completer_word_break_characters
=
1645 gdb_completer_command_word_break_characters
;
1649 /* It is a normal command; what comes after it is
1650 completed by the command's completer function. */
1651 list
= (*c
->completer
) (p
, word
);
1656 /* The command is not followed by whitespace; we need to
1657 complete on the command itself. e.g. "p" which is a
1658 command itself but also can complete to "print", "ptype"
1662 /* Find the command we are completing on. */
1664 while (q
> tmp_command
)
1666 if (isalnum (q
[-1]) || q
[-1] == '-' || q
[-1] == '_')
1672 list
= complete_on_cmdlist (result_list
, q
, word
);
1674 /* Insure that readline does the right thing
1675 with respect to inserting quotes. */
1676 rl_completer_word_break_characters
=
1677 gdb_completer_command_word_break_characters
;
1682 /* There is non-whitespace beyond the command. */
1684 if (c
->prefixlist
&& !c
->allow_unknown
)
1686 /* It is an unrecognized subcommand of a prefix command,
1687 e.g. "info adsfkdj". */
1692 list
= complete_on_enum (c
->enums
, p
, word
);
1696 /* It is a normal command. */
1697 list
= (*c
->completer
) (p
, word
);
1703 /* If we found a list of potential completions during initialization then
1704 dole them out one at a time. The vector of completions is NULL
1705 terminated, so after returning the last one, return NULL (and continue
1706 to do so) each time we are called after that, until a new list is
1711 output
= list
[index
];
1719 /* Can't do this because readline hasn't yet checked the word breaks
1720 for figuring out whether to insert a quote. */
1722 /* Make sure the word break characters are set back to normal for the
1723 next time that readline tries to complete something. */
1724 rl_completer_word_break_characters
=
1725 gdb_completer_word_break_characters
;
1731 /* Line completion interface function for readline. */
1734 readline_line_completion_function (text
, matches
)
1738 return line_completion_function (text
, matches
, rl_line_buffer
, rl_point
);
1741 /* Skip over a possibly quoted word (as defined by the quote characters
1742 and word break characters the completer uses). Returns pointer to the
1743 location after the "word". */
1749 char quote_char
= '\0';
1752 for (scan
= str
; *scan
!= '\0'; scan
++)
1754 if (quote_char
!= '\0')
1756 /* Ignore everything until the matching close quote char */
1757 if (*scan
== quote_char
)
1759 /* Found matching close quote. */
1764 else if (strchr (gdb_completer_quote_characters
, *scan
))
1766 /* Found start of a quoted string. */
1769 else if (strchr (gdb_completer_word_break_characters
, *scan
))
1783 #if STOP_SIGNAL == SIGTSTP
1784 signal (SIGTSTP
, SIG_DFL
);
1786 kill (getpid (), SIGTSTP
);
1787 signal (SIGTSTP
, stop_sig
);
1789 signal (STOP_SIGNAL
, stop_sig
);
1791 printf_unfiltered ("%s", prompt
);
1792 gdb_flush (gdb_stdout
);
1794 /* Forget about any previous command -- null line now will do nothing. */
1797 #endif /* STOP_SIGNAL */
1799 /* Initialize signal handlers. */
1809 signal (SIGINT
, request_quit
);
1811 /* If we initialize SIGQUIT to SIG_IGN, then the SIG_IGN will get
1812 passed to the inferior, which we don't want. It would be
1813 possible to do a "signal (SIGQUIT, SIG_DFL)" after we fork, but
1814 on BSD4.3 systems using vfork, that can affect the
1815 GDB process as well as the inferior (the signal handling tables
1816 might be in memory, shared between the two). Since we establish
1817 a handler for SIGQUIT, when we call exec it will set the signal
1818 to SIG_DFL for us. */
1819 signal (SIGQUIT
, do_nothing
);
1820 if (signal (SIGHUP
, do_nothing
) != SIG_IGN
)
1821 signal (SIGHUP
, disconnect
);
1822 signal (SIGFPE
, float_handler
);
1824 #if defined(SIGWINCH) && defined(SIGWINCH_HANDLER)
1825 signal (SIGWINCH
, SIGWINCH_HANDLER
);
1829 /* Read one line from the command input stream `instream'
1830 into the local static buffer `linebuffer' (whose current length
1832 The buffer is made bigger as necessary.
1833 Returns the address of the start of the line.
1835 NULL is returned for end of file.
1837 *If* the instream == stdin & stdin is a terminal, the line read
1838 is copied into the file line saver (global var char *line,
1839 length linesize) so that it can be duplicated.
1841 This routine either uses fancy command line editing or
1842 simple input as the user has requested. */
1845 command_line_input (prrompt
, repeat
, annotation_suffix
)
1848 char *annotation_suffix
;
1850 static char *linebuffer
= 0;
1851 static unsigned linelength
= 0;
1855 char *local_prompt
= prrompt
;
1860 /* The annotation suffix must be non-NULL. */
1861 if (annotation_suffix
== NULL
)
1862 annotation_suffix
= "";
1864 if (annotation_level
> 1 && instream
== stdin
)
1866 local_prompt
= alloca ((prrompt
== NULL
? 0 : strlen (prrompt
))
1867 + strlen (annotation_suffix
) + 40);
1868 if (prrompt
== NULL
)
1869 local_prompt
[0] = '\0';
1871 strcpy (local_prompt
, prrompt
);
1872 strcat (local_prompt
, "\n\032\032");
1873 strcat (local_prompt
, annotation_suffix
);
1874 strcat (local_prompt
, "\n");
1877 if (linebuffer
== 0)
1880 linebuffer
= (char *) xmalloc (linelength
);
1885 /* Control-C quits instantly if typed while in this loop
1886 since it should not wait until the user types a newline. */
1890 signal (STOP_SIGNAL
, stop_sig
);
1895 /* Make sure that all output has been output. Some machines may let
1896 you get away with leaving out some of the gdb_flush, but not all. */
1898 gdb_flush (gdb_stdout
);
1899 gdb_flush (gdb_stderr
);
1901 if (source_file_name
!= NULL
)
1903 ++source_line_number
;
1904 sprintf (source_error
,
1905 "%s%s:%d: Error in sourced command file:\n",
1908 source_line_number
);
1909 error_pre_print
= source_error
;
1912 if (annotation_level
> 1 && instream
== stdin
)
1914 printf_unfiltered ("\n\032\032pre-");
1915 printf_unfiltered (annotation_suffix
);
1916 printf_unfiltered ("\n");
1919 /* Don't use fancy stuff if not talking to stdin. */
1920 if (command_editing_p
&& instream
== stdin
1921 && ISATTY (instream
))
1922 rl
= readline (local_prompt
);
1924 rl
= gdb_readline (local_prompt
);
1926 if (annotation_level
> 1 && instream
== stdin
)
1928 printf_unfiltered ("\n\032\032post-");
1929 printf_unfiltered (annotation_suffix
);
1930 printf_unfiltered ("\n");
1933 if (!rl
|| rl
== (char *) EOF
)
1938 if (strlen(rl
) + 1 + (p
- linebuffer
) > linelength
)
1940 linelength
= strlen(rl
) + 1 + (p
- linebuffer
);
1941 nline
= (char *) xrealloc (linebuffer
, linelength
);
1942 p
+= nline
- linebuffer
;
1946 /* Copy line. Don't copy null at end. (Leaves line alone
1947 if this was just a newline) */
1951 free (rl
); /* Allocated in readline. */
1953 if (p
== linebuffer
|| *(p
- 1) != '\\')
1956 p
--; /* Put on top of '\'. */
1957 local_prompt
= (char *) 0;
1962 signal (STOP_SIGNAL
, SIG_DFL
);
1969 #define SERVER_COMMAND_LENGTH 7
1971 (p
- linebuffer
> SERVER_COMMAND_LENGTH
)
1972 && STREQN (linebuffer
, "server ", SERVER_COMMAND_LENGTH
);
1975 /* Note that we don't set `line'. Between this and the check in
1976 dont_repeat, this insures that repeating will still do the
1979 return linebuffer
+ SERVER_COMMAND_LENGTH
;
1982 /* Do history expansion if that is wished. */
1983 if (history_expansion_p
&& instream
== stdin
1984 && ISATTY (instream
))
1986 char *history_value
;
1989 *p
= '\0'; /* Insert null now. */
1990 expanded
= history_expand (linebuffer
, &history_value
);
1993 /* Print the changes. */
1994 printf_unfiltered ("%s\n", history_value
);
1996 /* If there was an error, call this function again. */
1999 free (history_value
);
2000 return command_line_input (prrompt
, repeat
, annotation_suffix
);
2002 if (strlen (history_value
) > linelength
)
2004 linelength
= strlen (history_value
) + 1;
2005 linebuffer
= (char *) xrealloc (linebuffer
, linelength
);
2007 strcpy (linebuffer
, history_value
);
2008 p
= linebuffer
+ strlen(linebuffer
);
2009 free (history_value
);
2013 /* If we just got an empty line, and that is supposed
2014 to repeat the previous command, return the value in the
2018 if (p
== linebuffer
)
2021 while (*p1
== ' ' || *p1
== '\t')
2029 /* Add line to history if appropriate. */
2030 if (instream
== stdin
2031 && ISATTY (stdin
) && *linebuffer
)
2032 add_history (linebuffer
);
2034 /* Note: lines consisting solely of comments are added to the command
2035 history. This is useful when you type a command, and then
2036 realize you don't want to execute it quite yet. You can comment
2037 out the command and then later fetch it from the value history
2038 and remove the '#'. The kill ring is probably better, but some
2039 people are in the habit of commenting things out. */
2041 while ((c
= *p1
++) != '\0')
2044 while ((c
= *p1
++) != '"')
2046 /* Make sure an escaped '"' doesn't make us think the string
2054 while ((c
= *p1
++) != '\'')
2056 /* Make sure an escaped '\'' doesn't make us think the string
2065 /* Found a comment. */
2071 /* Save into global buffer if appropriate. */
2074 if (linelength
> linesize
)
2076 line
= xrealloc (line
, linelength
);
2077 linesize
= linelength
;
2079 strcpy (line
, linebuffer
);
2087 /* Expand the body_list of COMMAND so that it can hold NEW_LENGTH
2088 code bodies. This is typically used when we encounter an "else"
2089 clause for an "if" command. */
2092 realloc_body_list (command
, new_length
)
2093 struct command_line
*command
;
2097 struct command_line
**body_list
;
2099 n
= command
->body_count
;
2101 /* Nothing to do? */
2102 if (new_length
<= n
)
2105 body_list
= (struct command_line
**)
2106 xmalloc (sizeof (struct command_line
*) * new_length
);
2108 memcpy (body_list
, command
->body_list
, sizeof (struct command_line
*) * n
);
2110 free (command
->body_list
);
2111 command
->body_list
= body_list
;
2112 command
->body_count
= new_length
;
2115 /* Read one line from the input stream. If the command is an "else" or
2116 "end", return such an indication to the caller. */
2118 static enum misc_command_type
2119 read_next_line (command
)
2120 struct command_line
**command
;
2122 char *p
, *p1
, *prompt_ptr
, control_prompt
[256];
2125 if (control_level
>= 254)
2126 error ("Control nesting too deep!\n");
2128 /* Set a prompt based on the nesting of the control commands. */
2129 if (instream
== stdin
)
2131 for (i
= 0; i
< control_level
; i
++)
2132 control_prompt
[i
] = ' ';
2133 control_prompt
[i
] = '>';
2134 control_prompt
[i
+1] = '\0';
2135 prompt_ptr
= (char *)&control_prompt
[0];
2140 p
= command_line_input (prompt_ptr
, instream
== stdin
, "commands");
2142 /* Not sure what to do here. */
2146 /* Strip leading and trailing whitespace. */
2147 while (*p
== ' ' || *p
== '\t')
2150 p1
= p
+ strlen (p
);
2151 while (p1
!= p
&& (p1
[-1] == ' ' || p1
[-1] == '\t'))
2154 /* Blanks and comments don't really do anything, but we need to
2155 distinguish them from else, end and other commands which can be
2157 if (p1
== p
|| p
[0] == '#')
2160 /* Is this the end of a simple, while, or if control structure? */
2161 if (p1
- p
== 3 && !strncmp (p
, "end", 3))
2164 /* Is the else clause of an if control structure? */
2165 if (p1
- p
== 4 && !strncmp (p
, "else", 4))
2166 return else_command
;
2168 /* Check for while, if, break, continue, etc and build a new command
2169 line structure for them. */
2170 if (p1
- p
> 5 && !strncmp (p
, "while", 5))
2171 *command
= build_command_line (while_control
, p
+ 6);
2172 else if (p1
- p
> 2 && !strncmp (p
, "if", 2))
2173 *command
= build_command_line (if_control
, p
+ 3);
2174 else if (p1
- p
== 5 && !strncmp (p
, "loop_break", 5))
2176 *command
= (struct command_line
*)
2177 xmalloc (sizeof (struct command_line
));
2178 (*command
)->next
= NULL
;
2179 (*command
)->line
= NULL
;
2180 (*command
)->control_type
= break_control
;
2181 (*command
)->body_count
= 0;
2182 (*command
)->body_list
= NULL
;
2184 else if (p1
- p
== 8 && !strncmp (p
, "loop_continue", 8))
2186 *command
= (struct command_line
*)
2187 xmalloc (sizeof (struct command_line
));
2188 (*command
)->next
= NULL
;
2189 (*command
)->line
= NULL
;
2190 (*command
)->control_type
= continue_control
;
2191 (*command
)->body_count
= 0;
2192 (*command
)->body_list
= NULL
;
2196 /* A normal command. */
2197 *command
= (struct command_line
*)
2198 xmalloc (sizeof (struct command_line
));
2199 (*command
)->next
= NULL
;
2200 (*command
)->line
= savestring (p
, p1
- p
);
2201 (*command
)->control_type
= simple_control
;
2202 (*command
)->body_count
= 0;
2203 (*command
)->body_list
= NULL
;
2206 /* Nothing special. */
2210 /* Recursively read in the control structures and create a command_line
2213 The parent_control parameter is the control structure in which the
2214 following commands are nested. */
2216 static enum command_control_type
2217 recurse_read_control_structure (current_cmd
)
2218 struct command_line
*current_cmd
;
2220 int current_body
, i
;
2221 enum misc_command_type val
;
2222 enum command_control_type ret
;
2223 struct command_line
**body_ptr
, *child_tail
, *next
;
2224 struct cleanup
*old_chains
, *tmp_chains
;
2230 /* Sanity checks. */
2231 if (current_cmd
->control_type
== simple_control
)
2233 error ("Recursed on a simple control type\n");
2234 return invalid_control
;
2237 if (current_body
> current_cmd
->body_count
)
2239 error ("Allocated body is smaller than this command type needs\n");
2240 return invalid_control
;
2243 /* Read lines from the input stream and build control structures. */
2249 val
= read_next_line (&next
);
2251 /* Just skip blanks and comments. */
2252 if (val
== nop_command
)
2255 if (val
== end_command
)
2257 if (current_cmd
->control_type
== while_control
2258 || current_cmd
->control_type
== if_control
)
2260 /* Success reading an entire control structure. */
2261 ret
= simple_control
;
2266 ret
= invalid_control
;
2271 /* Not the end of a control structure. */
2272 if (val
== else_command
)
2274 if (current_cmd
->control_type
== if_control
2275 && current_body
== 1)
2277 realloc_body_list (current_cmd
, 2);
2284 ret
= invalid_control
;
2291 child_tail
->next
= next
;
2295 /* We have just read the first line of the child's control
2296 structure. From now on, arrange to throw away the line
2297 we have if we quit or get an error. */
2298 body_ptr
= current_cmd
->body_list
;
2299 for (i
= 1; i
< current_body
; i
++)
2304 tmp_chains
= make_cleanup (free_command_lines
, body_ptr
);
2307 old_chains
= tmp_chains
;
2312 /* If the latest line is another control structure, then recurse
2314 if (next
->control_type
== while_control
2315 || next
->control_type
== if_control
)
2318 ret
= recurse_read_control_structure (next
);
2321 if (ret
!= simple_control
)
2327 if (ret
== invalid_control
&& old_chains
)
2328 do_cleanups (old_chains
);
2329 else if (old_chains
)
2330 discard_cleanups (old_chains
);
2336 /* Read lines from the input stream
2337 and accumulate them in a chain of struct command_line's
2338 which is then returned. */
2340 struct command_line
*
2341 read_command_lines ()
2343 struct command_line
*head
, *tail
, *next
;
2344 struct cleanup
*old_chain
;
2345 enum command_control_type ret
;
2346 enum misc_command_type val
;
2353 val
= read_next_line (&next
);
2355 /* Ignore blank lines or comments. */
2356 if (val
== nop_command
)
2359 if (val
== end_command
)
2361 ret
= simple_control
;
2365 if (val
!= ok_command
)
2367 ret
= invalid_control
;
2371 if (next
->control_type
== while_control
2372 || next
->control_type
== if_control
)
2375 ret
= recurse_read_control_structure (next
);
2378 if (ret
== invalid_control
)
2389 old_chain
= make_cleanup (free_command_lines
, &head
);
2398 if (ret
!= invalid_control
)
2400 discard_cleanups (old_chain
);
2404 do_cleanups (old_chain
);
2410 /* Free a chain of struct command_line's. */
2413 free_command_lines (lptr
)
2414 struct command_line
**lptr
;
2416 register struct command_line
*l
= *lptr
;
2417 register struct command_line
*next
;
2418 struct command_line
**blist
;
2423 if (l
->body_count
> 0)
2425 blist
= l
->body_list
;
2426 for (i
= 0; i
< l
->body_count
; i
++, blist
++)
2427 free_command_lines (blist
);
2436 /* Add an element to the list of info subcommands. */
2439 add_info (name
, fun
, doc
)
2441 void (*fun
) PARAMS ((char *, int));
2444 add_cmd (name
, no_class
, fun
, doc
, &infolist
);
2447 /* Add an alias to the list of info subcommands. */
2450 add_info_alias (name
, oldname
, abbrev_flag
)
2455 add_alias_cmd (name
, oldname
, 0, abbrev_flag
, &infolist
);
2458 /* The "info" command is defined as a prefix, with allow_unknown = 0.
2459 Therefore, its own definition is called only for "info" with no args. */
2463 info_command (arg
, from_tty
)
2467 printf_unfiltered ("\"info\" must be followed by the name of an info command.\n");
2468 help_list (infolist
, "info ", -1, gdb_stdout
);
2471 /* The "complete" command is used by Emacs to implement completion. */
2475 complete_command (arg
, from_tty
)
2487 argpoint
= strlen (arg
);
2489 for (completion
= line_completion_function (arg
, i
= 0, arg
, argpoint
);
2491 completion
= line_completion_function (arg
, ++i
, arg
, argpoint
))
2493 printf_unfiltered ("%s\n", completion
);
2498 /* The "show" command with no arguments shows all the settings. */
2502 show_command (arg
, from_tty
)
2506 cmd_show_list (showlist
, from_tty
, "");
2509 /* Add an element to the list of commands. */
2512 add_com (name
, class, fun
, doc
)
2514 enum command_class
class;
2515 void (*fun
) PARAMS ((char *, int));
2518 add_cmd (name
, class, fun
, doc
, &cmdlist
);
2521 /* Add an alias or abbreviation command to the list of commands. */
2524 add_com_alias (name
, oldname
, class, abbrev_flag
)
2527 enum command_class
class;
2530 add_alias_cmd (name
, oldname
, class, abbrev_flag
, &cmdlist
);
2537 error ("Argument required (%s).", why
);
2542 help_command (command
, from_tty
)
2544 int from_tty
; /* Ignored */
2546 help_cmd (command
, gdb_stdout
);
2550 validate_comname (comname
)
2556 error_no_arg ("name of command to define");
2561 if (!isalnum(*p
) && *p
!= '-')
2562 error ("Junk in argument list: \"%s\"", p
);
2567 /* This is just a placeholder in the command data structures. */
2569 user_defined_command (ignore
, from_tty
)
2576 define_command (comname
, from_tty
)
2580 register struct command_line
*cmds
;
2581 register struct cmd_list_element
*c
, *newc
, *hookc
= 0;
2582 char *tem
= comname
;
2583 #define HOOK_STRING "hook-"
2586 validate_comname (comname
);
2588 /* Look it up, and verify that we got an exact match. */
2589 c
= lookup_cmd (&tem
, cmdlist
, "", -1, 1);
2590 if (c
&& !STREQ (comname
, c
->name
))
2595 if (c
->class == class_user
|| c
->class == class_alias
)
2596 tem
= "Redefine command \"%s\"? ";
2598 tem
= "Really redefine built-in command \"%s\"? ";
2599 if (!query (tem
, c
->name
))
2600 error ("Command \"%s\" not redefined.", c
->name
);
2603 /* If this new command is a hook, then mark the command which it
2604 is hooking. Note that we allow hooking `help' commands, so that
2605 we can hook the `stop' pseudo-command. */
2607 if (!strncmp (comname
, HOOK_STRING
, HOOK_LEN
))
2609 /* Look up cmd it hooks, and verify that we got an exact match. */
2610 tem
= comname
+HOOK_LEN
;
2611 hookc
= lookup_cmd (&tem
, cmdlist
, "", -1, 0);
2612 if (hookc
&& !STREQ (comname
+HOOK_LEN
, hookc
->name
))
2616 warning ("Your new `%s' command does not hook any existing command.",
2618 if (!query ("Proceed? ", (char *)0))
2619 error ("Not confirmed.");
2623 comname
= savestring (comname
, strlen (comname
));
2625 /* If the rest of the commands will be case insensitive, this one
2626 should behave in the same manner. */
2627 for (tem
= comname
; *tem
; tem
++)
2628 if (isupper(*tem
)) *tem
= tolower(*tem
);
2632 printf_unfiltered ("Type commands for definition of \"%s\".\n\
2633 End with a line saying just \"end\".\n", comname
);
2634 gdb_flush (gdb_stdout
);
2638 cmds
= read_command_lines ();
2640 if (c
&& c
->class == class_user
)
2641 free_command_lines (&c
->user_commands
);
2643 newc
= add_cmd (comname
, class_user
, user_defined_command
,
2644 (c
&& c
->class == class_user
)
2645 ? c
->doc
: savestring ("User-defined.", 13), &cmdlist
);
2646 newc
->user_commands
= cmds
;
2648 /* If this new command is a hook, then mark both commands as being
2652 hookc
->hook
= newc
; /* Target gets hooked. */
2653 newc
->hookee
= hookc
; /* We are marked as hooking target cmd. */
2658 document_command (comname
, from_tty
)
2662 struct command_line
*doclines
;
2663 register struct cmd_list_element
*c
;
2664 char *tem
= comname
;
2666 validate_comname (comname
);
2668 c
= lookup_cmd (&tem
, cmdlist
, "", 0, 1);
2670 if (c
->class != class_user
)
2671 error ("Command \"%s\" is built-in.", comname
);
2674 printf_unfiltered ("Type documentation for \"%s\".\n\
2675 End with a line saying just \"end\".\n", comname
);
2677 doclines
= read_command_lines ();
2679 if (c
->doc
) free (c
->doc
);
2682 register struct command_line
*cl1
;
2683 register int len
= 0;
2685 for (cl1
= doclines
; cl1
; cl1
= cl1
->next
)
2686 len
+= strlen (cl1
->line
) + 1;
2688 c
->doc
= (char *) xmalloc (len
+ 1);
2691 for (cl1
= doclines
; cl1
; cl1
= cl1
->next
)
2693 strcat (c
->doc
, cl1
->line
);
2695 strcat (c
->doc
, "\n");
2699 free_command_lines (&doclines
);
2703 print_gnu_advertisement ()
2705 printf_unfiltered ("\
2706 GDB is free software and you are welcome to distribute copies of it\n\
2707 under certain conditions; type \"show copying\" to see the conditions.\n\
2708 There is absolutely no warranty for GDB; type \"show warranty\" for details.\n\
2713 print_gdb_version (stream
)
2716 fprintf_filtered (stream
, "\
2717 GDB %s (%s", version
, host_name
);
2719 if (!STREQ (host_name
, target_name
))
2720 fprintf_filtered (stream
, " --target %s", target_name
);
2722 fprintf_filtered (stream
, "), ");
2724 fprintf_filtered (stream
, "Copyright 1995 Free Software Foundation, Inc.");
2729 show_version (args
, from_tty
)
2734 print_gnu_advertisement ();
2735 print_gdb_version (gdb_stdout
);
2736 printf_filtered ("\n");
2740 /* xgdb calls this to reprint the usual GDB prompt. Obsolete now that xgdb
2746 printf_unfiltered ("%s", prompt
);
2747 gdb_flush (gdb_stdout
);
2751 quit_command (args
, from_tty
)
2755 if (inferior_pid
!= 0 && target_has_execution
)
2759 if (query ("The program is running. Quit anyway (and detach it)? "))
2760 target_detach (args
, from_tty
);
2762 error ("Not confirmed.");
2766 if (query ("The program is running. Quit anyway (and kill it)? "))
2769 error ("Not confirmed.");
2772 /* UDI wants this, to kill the TIP. */
2775 /* Save the history information if it is appropriate to do so. */
2776 if (write_history_p
&& history_filename
)
2777 write_history (history_filename
);
2782 /* Returns whether GDB is running on a terminal and whether the user
2783 desires that questions be asked of them on that terminal. */
2786 input_from_terminal_p ()
2788 return gdb_has_a_terminal () && (instream
== stdin
) & caution
;
2793 pwd_command (args
, from_tty
)
2797 if (args
) error ("The \"pwd\" command does not take an argument: %s", args
);
2798 getcwd (gdb_dirbuf
, sizeof (gdb_dirbuf
));
2800 if (!STREQ (gdb_dirbuf
, current_directory
))
2801 printf_unfiltered ("Working directory %s\n (canonically %s).\n",
2802 current_directory
, gdb_dirbuf
);
2804 printf_unfiltered ("Working directory %s.\n", current_directory
);
2808 cd_command (dir
, from_tty
)
2813 /* Found something other than leading repetitions of "/..". */
2814 int found_real_path
;
2817 /* If the new directory is absolute, repeat is a no-op; if relative,
2818 repeat might be useful but is more likely to be a mistake. */
2822 error_no_arg ("new working directory");
2824 dir
= tilde_expand (dir
);
2825 make_cleanup (free
, dir
);
2827 if (chdir (dir
) < 0)
2828 perror_with_name (dir
);
2831 dir
= savestring (dir
, len
- (len
> 1 && dir
[len
-1] == '/'));
2833 current_directory
= dir
;
2836 if (current_directory
[0] == '/' && current_directory
[1] == '\0')
2837 current_directory
= concat (current_directory
, dir
, NULL
);
2839 current_directory
= concat (current_directory
, "/", dir
, NULL
);
2843 /* Now simplify any occurrences of `.' and `..' in the pathname. */
2845 found_real_path
= 0;
2846 for (p
= current_directory
; *p
;)
2848 if (p
[0] == '/' && p
[1] == '.' && (p
[2] == 0 || p
[2] == '/'))
2850 else if (p
[0] == '/' && p
[1] == '.' && p
[2] == '.'
2851 && (p
[3] == 0 || p
[3] == '/'))
2853 if (found_real_path
)
2855 /* Search backwards for the directory just before the "/.."
2856 and obliterate it and the "/..". */
2858 while (q
!= current_directory
&& q
[-1] != '/')
2861 if (q
== current_directory
)
2862 /* current_directory is
2863 a relative pathname ("can't happen"--leave it alone). */
2867 strcpy (q
- 1, p
+ 3);
2872 /* We are dealing with leading repetitions of "/..", for example
2873 "/../..", which is the Mach super-root. */
2878 found_real_path
= 1;
2883 forget_cached_source_info ();
2886 pwd_command ((char *) 0, 1);
2889 struct source_cleanup_lines_args
{
2892 char *old_pre_error
;
2893 char *old_error_pre_print
;
2897 source_cleanup_lines (args
)
2900 struct source_cleanup_lines_args
*p
=
2901 (struct source_cleanup_lines_args
*)args
;
2902 source_line_number
= p
->old_line
;
2903 source_file_name
= p
->old_file
;
2904 source_pre_error
= p
->old_pre_error
;
2905 error_pre_print
= p
->old_error_pre_print
;
2910 source_command (args
, from_tty
)
2915 struct cleanup
*old_cleanups
;
2917 struct source_cleanup_lines_args old_lines
;
2922 error ("source command requires pathname of file to source.");
2925 file
= tilde_expand (file
);
2926 old_cleanups
= make_cleanup (free
, file
);
2928 stream
= fopen (file
, FOPEN_RT
);
2930 perror_with_name (file
);
2932 make_cleanup (fclose
, stream
);
2934 old_lines
.old_line
= source_line_number
;
2935 old_lines
.old_file
= source_file_name
;
2936 old_lines
.old_pre_error
= source_pre_error
;
2937 old_lines
.old_error_pre_print
= error_pre_print
;
2938 make_cleanup (source_cleanup_lines
, &old_lines
);
2939 source_line_number
= 0;
2940 source_file_name
= file
;
2941 source_pre_error
= error_pre_print
== NULL
? "" : error_pre_print
;
2942 source_pre_error
= savestring (source_pre_error
, strlen (source_pre_error
));
2943 make_cleanup (free
, source_pre_error
);
2944 /* This will get set every time we read a line. So it won't stay "" for
2946 error_pre_print
= "";
2948 needed_length
= strlen (source_file_name
) + strlen (source_pre_error
) + 80;
2949 if (source_error_allocated
< needed_length
)
2951 source_error_allocated
*= 2;
2952 if (source_error_allocated
< needed_length
)
2953 source_error_allocated
= needed_length
;
2954 if (source_error
== NULL
)
2955 source_error
= xmalloc (source_error_allocated
);
2957 source_error
= xrealloc (source_error
, source_error_allocated
);
2960 read_command_file (stream
);
2962 do_cleanups (old_cleanups
);
2967 echo_command (text
, from_tty
)
2975 while ((c
= *p
++) != '\0')
2979 /* \ at end of argument is used after spaces
2980 so they won't be lost. */
2984 c
= parse_escape (&p
);
2986 printf_filtered ("%c", c
);
2989 printf_filtered ("%c", c
);
2992 /* Force this output to appear now. */
2994 gdb_flush (gdb_stdout
);
2998 #ifdef TARGET_BYTE_ORDER_SELECTABLE
3000 /* Functions to manipulate the endianness of the target. */
3002 #ifndef TARGET_BYTE_ORDER_DEFAULT
3003 #define TARGET_BYTE_ORDER_DEFAULT BIG_ENDIAN
3006 int target_byte_order
= TARGET_BYTE_ORDER_DEFAULT
;
3008 static int target_byte_order_auto
= 1;
3010 /* Called if the user enters ``set endian'' without an argument. */
3012 set_endian (args
, from_tty
)
3016 printf_unfiltered ("\"set endian\" must be followed by \"auto\", \"big\" or \"little\".\n");
3017 show_endian (args
, from_tty
);
3020 /* Called by ``set endian big''. */
3022 set_endian_big (args
, from_tty
)
3026 target_byte_order
= BIG_ENDIAN
;
3027 target_byte_order_auto
= 0;
3030 /* Called by ``set endian little''. */
3032 set_endian_little (args
, from_tty
)
3036 target_byte_order
= LITTLE_ENDIAN
;
3037 target_byte_order_auto
= 0;
3040 /* Called by ``set endian auto''. */
3042 set_endian_auto (args
, from_tty
)
3046 target_byte_order_auto
= 1;
3049 /* Called by ``show endian''. */
3051 show_endian (args
, from_tty
)
3056 (target_byte_order_auto
3057 ? "The target endianness is set automatically (currently %s endian)\n"
3058 : "The target is assumed to be %s endian\n");
3059 printf_unfiltered (msg
, TARGET_BYTE_ORDER
== BIG_ENDIAN
? "big" : "little");
3062 #endif /* defined (TARGET_BYTE_ORDER_SELECTABLE) */
3064 /* Set the endianness from a BFD. */
3066 set_endian_from_file (abfd
)
3069 #ifdef TARGET_BYTE_ORDER_SELECTABLE
3072 if (abfd
->xvec
->byteorder_big_p
)
3075 want
= LITTLE_ENDIAN
;
3076 if (target_byte_order_auto
)
3077 target_byte_order
= want
;
3078 else if (target_byte_order
!= want
)
3079 warning ("%s endian file does not match %s endian target.",
3080 want
== BIG_ENDIAN
? "big" : "little",
3081 TARGET_BYTE_ORDER
== BIG_ENDIAN
? "big" : "little");
3083 #else /* ! defined (TARGET_BYTE_ORDER_SELECTABLE) */
3085 if (abfd
->xvec
->byteorder_big_p
3086 ? TARGET_BYTE_ORDER
!= BIG_ENDIAN
3087 : TARGET_BYTE_ORDER
== BIG_ENDIAN
)
3088 warning ("%s endian file does not match %s endian target.",
3089 abfd
->xvec
->byteorder_big_p
? "big" : "little",
3090 TARGET_BYTE_ORDER
== BIG_ENDIAN
? "big" : "little");
3092 #endif /* ! defined (TARGET_BYTE_ORDER_SELECTABLE) */
3095 /* Functions to manipulate command line editing control variables. */
3097 /* Number of commands to print in each call to show_commands. */
3098 #define Hist_print 10
3100 show_commands (args
, from_tty
)
3104 /* Index for history commands. Relative to history_base. */
3107 /* Number of the history entry which we are planning to display next.
3108 Relative to history_base. */
3111 /* The first command in the history which doesn't exist (i.e. one more
3112 than the number of the last command). Relative to history_base. */
3115 extern HIST_ENTRY
*history_get
PARAMS ((int));
3117 /* Print out some of the commands from the command history. */
3118 /* First determine the length of the history list. */
3119 hist_len
= history_size
;
3120 for (offset
= 0; offset
< history_size
; offset
++)
3122 if (!history_get (history_base
+ offset
))
3131 if (args
[0] == '+' && args
[1] == '\0')
3132 /* "info editing +" should print from the stored position. */
3135 /* "info editing <exp>" should print around command number <exp>. */
3136 num
= (parse_and_eval_address (args
) - history_base
) - Hist_print
/ 2;
3138 /* "show commands" means print the last Hist_print commands. */
3141 num
= hist_len
- Hist_print
;
3147 /* If there are at least Hist_print commands, we want to display the last
3148 Hist_print rather than, say, the last 6. */
3149 if (hist_len
- num
< Hist_print
)
3151 num
= hist_len
- Hist_print
;
3156 for (offset
= num
; offset
< num
+ Hist_print
&& offset
< hist_len
; offset
++)
3158 printf_filtered ("%5d %s\n", history_base
+ offset
,
3159 (history_get (history_base
+ offset
))->line
);
3162 /* The next command we want to display is the next one that we haven't
3166 /* If the user repeats this command with return, it should do what
3167 "show commands +" does. This is unnecessary if arg is null,
3168 because "show commands +" is not useful after "show commands". */
3169 if (from_tty
&& args
)
3176 /* Called by do_setshow_command. */
3179 set_history_size_command (args
, from_tty
, c
)
3182 struct cmd_list_element
*c
;
3184 if (history_size
== INT_MAX
)
3185 unstifle_history ();
3186 else if (history_size
>= 0)
3187 stifle_history (history_size
);
3190 history_size
= INT_MAX
;
3191 error ("History size must be non-negative");
3197 set_history (args
, from_tty
)
3201 printf_unfiltered ("\"set history\" must be followed by the name of a history subcommand.\n");
3202 help_list (sethistlist
, "set history ", -1, gdb_stdout
);
3207 show_history (args
, from_tty
)
3211 cmd_show_list (showhistlist
, from_tty
, "");
3214 int info_verbose
= 0; /* Default verbose msgs off */
3216 /* Called by do_setshow_command. An elaborate joke. */
3219 set_verbose (args
, from_tty
, c
)
3222 struct cmd_list_element
*c
;
3224 char *cmdname
= "verbose";
3225 struct cmd_list_element
*showcmd
;
3227 showcmd
= lookup_cmd_1 (&cmdname
, showlist
, NULL
, 1);
3231 c
->doc
= "Set verbose printing of informational messages.";
3232 showcmd
->doc
= "Show verbose printing of informational messages.";
3236 c
->doc
= "Set verbosity.";
3237 showcmd
->doc
= "Show verbosity.";
3242 float_handler (signo
)
3245 /* This message is based on ANSI C, section 4.7. Note that integer
3246 divide by zero causes this, so "float" is a misnomer. */
3247 signal (SIGFPE
, float_handler
);
3248 error ("Erroneous arithmetic operation.");
3260 enablebreaklist
= NULL
;
3264 #ifdef TARGET_BYTE_ORDER_SELECTABLE
3268 showhistlist
= NULL
;
3269 unsethistlist
= NULL
;
3270 #if MAINTENANCE_CMDS
3271 maintenancelist
= NULL
;
3272 maintenanceinfolist
= NULL
;
3273 maintenanceprintlist
= NULL
;
3275 setprintlist
= NULL
;
3276 showprintlist
= NULL
;
3277 setchecklist
= NULL
;
3278 showchecklist
= NULL
;
3281 /* Init the history buffer. Note that we are called after the init file(s)
3282 * have been read so that the user can change the history file via his
3283 * .gdbinit file (for instance). The GDBHISTFILE environment variable
3284 * overrides all of this.
3292 tmpenv
= getenv ("HISTSIZE");
3294 history_size
= atoi (tmpenv
);
3295 else if (!history_size
)
3298 stifle_history (history_size
);
3300 tmpenv
= getenv ("GDBHISTFILE");
3302 history_filename
= savestring (tmpenv
, strlen(tmpenv
));
3303 else if (!history_filename
) {
3304 /* We include the current directory so that if the user changes
3305 directories the file written will be the same as the one
3307 history_filename
= concat (current_directory
, "/.gdb_history", NULL
);
3309 read_history (history_filename
);
3315 struct cmd_list_element
*c
;
3317 #ifdef TARGET_BYTE_ORDER_SELECTABLE
3319 add_prefix_cmd ("endian", class_support
, set_endian
,
3320 "Set endianness of target.",
3321 &endianlist
, "set endian ", 0, &setlist
);
3322 add_cmd ("big", class_support
, set_endian_big
,
3323 "Set target as being big endian.", &endianlist
);
3324 add_cmd ("little", class_support
, set_endian_little
,
3325 "Set target as being little endian.", &endianlist
);
3326 add_cmd ("auto", class_support
, set_endian_auto
,
3327 "Select target endianness automatically.", &endianlist
);
3328 add_cmd ("endian", class_support
, show_endian
,
3329 "Show endianness of target.", &showlist
);
3331 #endif /* defined (TARGET_BYTE_ORDER_SELECTABLE) */
3333 #ifdef DEFAULT_PROMPT
3334 prompt
= savestring (DEFAULT_PROMPT
, strlen(DEFAULT_PROMPT
));
3336 prompt
= savestring ("(gdb) ", 6);
3339 /* Set the important stuff up for command editing. */
3340 command_editing_p
= 1;
3341 history_expansion_p
= 0;
3342 write_history_p
= 0;
3344 /* Setup important stuff for command line editing. */
3345 rl_completion_entry_function
= (int (*)()) readline_line_completion_function
;
3346 rl_completer_word_break_characters
= gdb_completer_word_break_characters
;
3347 rl_completer_quote_characters
= gdb_completer_quote_characters
;
3348 rl_readline_name
= "gdb";
3350 /* Define the classes of commands.
3351 They will appear in the help list in the reverse of this order. */
3353 add_cmd ("internals", class_maintenance
, NO_FUNCTION
,
3354 "Maintenance commands.\n\
3355 Some gdb commands are provided just for use by gdb maintainers.\n\
3356 These commands are subject to frequent change, and may not be as\n\
3357 well documented as user commands.",
3359 add_cmd ("obscure", class_obscure
, NO_FUNCTION
, "Obscure features.", &cmdlist
);
3360 add_cmd ("aliases", class_alias
, NO_FUNCTION
, "Aliases of other commands.", &cmdlist
);
3361 add_cmd ("user-defined", class_user
, NO_FUNCTION
, "User-defined commands.\n\
3362 The commands in this class are those defined by the user.\n\
3363 Use the \"define\" command to define a command.", &cmdlist
);
3364 add_cmd ("support", class_support
, NO_FUNCTION
, "Support facilities.", &cmdlist
);
3365 add_cmd ("status", class_info
, NO_FUNCTION
, "Status inquiries.", &cmdlist
);
3366 add_cmd ("files", class_files
, NO_FUNCTION
, "Specifying and examining files.", &cmdlist
);
3367 add_cmd ("breakpoints", class_breakpoint
, NO_FUNCTION
, "Making program stop at certain points.", &cmdlist
);
3368 add_cmd ("data", class_vars
, NO_FUNCTION
, "Examining data.", &cmdlist
);
3369 add_cmd ("stack", class_stack
, NO_FUNCTION
, "Examining the stack.\n\
3370 The stack is made up of stack frames. Gdb assigns numbers to stack frames\n\
3371 counting from zero for the innermost (currently executing) frame.\n\n\
3372 At any time gdb identifies one frame as the \"selected\" frame.\n\
3373 Variable lookups are done with respect to the selected frame.\n\
3374 When the program being debugged stops, gdb selects the innermost frame.\n\
3375 The commands below can be used to select other frames by number or address.",
3377 add_cmd ("running", class_run
, NO_FUNCTION
, "Running the program.", &cmdlist
);
3379 add_com ("pwd", class_files
, pwd_command
,
3380 "Print working directory. This is used for your program as well.");
3381 c
= add_cmd ("cd", class_files
, cd_command
,
3382 "Set working directory to DIR for debugger and program being debugged.\n\
3383 The change does not take effect for the program being debugged\n\
3384 until the next time it is started.", &cmdlist
);
3385 c
->completer
= filename_completer
;
3388 (add_set_cmd ("prompt", class_support
, var_string
, (char *)&prompt
,
3393 add_com ("echo", class_support
, echo_command
,
3394 "Print a constant string. Give string as argument.\n\
3395 C escape sequences may be used in the argument.\n\
3396 No newline is added at the end of the argument;\n\
3397 use \"\\n\" if you want a newline to be printed.\n\
3398 Since leading and trailing whitespace are ignored in command arguments,\n\
3399 if you want to print some you must use \"\\\" before leading whitespace\n\
3400 to be printed or after trailing whitespace.");
3401 add_com ("document", class_support
, document_command
,
3402 "Document a user-defined command.\n\
3403 Give command name as argument. Give documentation on following lines.\n\
3404 End with a line of just \"end\".");
3405 add_com ("define", class_support
, define_command
,
3406 "Define a new command name. Command name is argument.\n\
3407 Definition appears on following lines, one command per line.\n\
3408 End with a line of just \"end\".\n\
3409 Use the \"document\" command to give documentation for the new command.\n\
3410 Commands defined in this way may have up to ten arguments.");
3413 c
= add_cmd ("source", class_support
, source_command
,
3414 "Read commands from a file named FILE.\n\
3415 Note that the file \"" GDBINIT_FILENAME
"\" is read automatically in this way\n\
3416 when gdb is started.", &cmdlist
);
3418 /* Punt file name, we can't help it easily. */
3419 c
= add_cmd ("source", class_support
, source_command
,
3420 "Read commands from a file named FILE.\n\
3421 Note that the file \".gdbinit\" is read automatically in this way\n\
3422 when gdb is started.", &cmdlist
);
3424 c
->completer
= filename_completer
;
3426 add_com ("quit", class_support
, quit_command
, "Exit gdb.");
3427 add_com ("help", class_support
, help_command
, "Print list of commands.");
3428 add_com_alias ("q", "quit", class_support
, 1);
3429 add_com_alias ("h", "help", class_support
, 1);
3432 c
= add_set_cmd ("verbose", class_support
, var_boolean
, (char *)&info_verbose
,
3435 add_show_from_set (c
, &showlist
);
3436 c
->function
.sfunc
= set_verbose
;
3437 set_verbose (NULL
, 0, c
);
3440 (add_set_cmd ("editing", class_support
, var_boolean
, (char *)&command_editing_p
,
3441 "Set editing of command lines as they are typed.\n\
3442 Use \"on\" to enable to enable the editing, and \"off\" to disable it.\n\
3443 Without an argument, command line editing is enabled. To edit, use\n\
3444 EMACS-like or VI-like commands like control-P or ESC.", &setlist
),
3447 add_prefix_cmd ("history", class_support
, set_history
,
3448 "Generic command for setting command history parameters.",
3449 &sethistlist
, "set history ", 0, &setlist
);
3450 add_prefix_cmd ("history", class_support
, show_history
,
3451 "Generic command for showing command history parameters.",
3452 &showhistlist
, "show history ", 0, &showlist
);
3455 (add_set_cmd ("expansion", no_class
, var_boolean
, (char *)&history_expansion_p
,
3456 "Set history expansion on command input.\n\
3457 Without an argument, history expansion is enabled.", &sethistlist
),
3461 (add_set_cmd ("save", no_class
, var_boolean
, (char *)&write_history_p
,
3462 "Set saving of the history record on exit.\n\
3463 Use \"on\" to enable to enable the saving, and \"off\" to disable it.\n\
3464 Without an argument, saving is enabled.", &sethistlist
),
3467 c
= add_set_cmd ("size", no_class
, var_integer
, (char *)&history_size
,
3468 "Set the size of the command history, \n\
3469 ie. the number of previous commands to keep a record of.", &sethistlist
);
3470 add_show_from_set (c
, &showhistlist
);
3471 c
->function
.sfunc
= set_history_size_command
;
3474 (add_set_cmd ("filename", no_class
, var_filename
, (char *)&history_filename
,
3475 "Set the filename in which to record the command history\n\
3476 (the list of previous commands of which a record is kept).", &sethistlist
),
3480 (add_set_cmd ("confirm", class_support
, var_boolean
,
3482 "Set whether to confirm potentially dangerous operations.",
3486 add_prefix_cmd ("info", class_info
, info_command
,
3487 "Generic command for showing things about the program being debugged.",
3488 &infolist
, "info ", 0, &cmdlist
);
3489 add_com_alias ("i", "info", class_info
, 1);
3491 add_com ("complete", class_obscure
, complete_command
,
3492 "List the completions for the rest of the line as a command.");
3494 add_prefix_cmd ("show", class_info
, show_command
,
3495 "Generic command for showing things about the debugger.",
3496 &showlist
, "show ", 0, &cmdlist
);
3497 /* Another way to get at the same thing. */
3498 add_info ("set", show_command
, "Show all GDB settings.");
3500 add_cmd ("commands", no_class
, show_commands
,
3501 "Show the the history of commands you typed.\n\
3502 You can supply a command number to start with, or a `+' to start after\n\
3503 the previous command number shown.",
3506 add_cmd ("version", no_class
, show_version
,
3507 "Show what version of GDB this is.", &showlist
);
3509 add_com ("while", class_support
, while_command
,
3510 "Execute nested commands WHILE the conditional expression is non zero.\n\
3511 The conditional expression must follow the word `while' and must in turn be\
3512 followed by a new line. The nested commands must be entered one per line,\
3513 and should be terminated by the word `end'.");
3515 add_com ("if", class_support
, if_command
,
3516 "Execute nested commands once IF the conditional expression is non zero.\n\
3517 The conditional expression must follow the word `if' and must in turn be\
3518 followed by a new line. The nested commands must be entered one per line,\
3519 and should be terminated by the word 'else' or `end'. If an else clause\
3520 is used, the same rules apply to its nested commands as to the first ones.");
3522 /* If target is open when baud changes, it doesn't take effect until the
3523 next open (I think, not sure). */
3524 add_show_from_set (add_set_cmd ("remotebaud", no_class
,
3525 var_zinteger
, (char *)&baud_rate
,
3526 "Set baud rate for remote serial I/O.\n\
3527 This value is used to set the speed of the serial port when debugging\n\
3528 using remote targets.", &setlist
),
3532 add_set_cmd ("remotedebug", no_class
, var_zinteger
, (char *)&remote_debug
,
3533 "Set debugging of remote protocol.\n\
3534 When enabled, each packet sent or received with the remote target\n\
3535 is displayed.", &setlist
),