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 /* It is a normal command; what comes after it is
1644 completed by the command's completer function. */
1645 list
= (*c
->completer
) (p
, word
);
1650 /* The command is not followed by whitespace; we need to
1651 complete on the command itself. e.g. "p" which is a
1652 command itself but also can complete to "print", "ptype"
1656 /* Find the command we are completing on. */
1658 while (q
> tmp_command
)
1660 if (isalnum (q
[-1]) || q
[-1] == '-' || q
[-1] == '_')
1666 list
= complete_on_cmdlist (result_list
, q
, word
);
1668 /* Insure that readline does the right thing
1669 with respect to inserting quotes. */
1670 rl_completer_word_break_characters
=
1671 gdb_completer_command_word_break_characters
;
1676 /* There is non-whitespace beyond the command. */
1678 if (c
->prefixlist
&& !c
->allow_unknown
)
1680 /* It is an unrecognized subcommand of a prefix command,
1681 e.g. "info adsfkdj". */
1686 /* It is a normal command. */
1687 list
= (*c
->completer
) (p
, word
);
1693 /* If we found a list of potential completions during initialization then
1694 dole them out one at a time. The vector of completions is NULL
1695 terminated, so after returning the last one, return NULL (and continue
1696 to do so) each time we are called after that, until a new list is
1701 output
= list
[index
];
1709 /* Can't do this because readline hasn't yet checked the word breaks
1710 for figuring out whether to insert a quote. */
1712 /* Make sure the word break characters are set back to normal for the
1713 next time that readline tries to complete something. */
1714 rl_completer_word_break_characters
=
1715 gdb_completer_word_break_characters
;
1721 /* Line completion interface function for readline. */
1724 readline_line_completion_function (text
, matches
)
1728 return line_completion_function (text
, matches
, rl_line_buffer
, rl_point
);
1731 /* Skip over a possibly quoted word (as defined by the quote characters
1732 and word break characters the completer uses). Returns pointer to the
1733 location after the "word". */
1739 char quote_char
= '\0';
1742 for (scan
= str
; *scan
!= '\0'; scan
++)
1744 if (quote_char
!= '\0')
1746 /* Ignore everything until the matching close quote char */
1747 if (*scan
== quote_char
)
1749 /* Found matching close quote. */
1754 else if (strchr (gdb_completer_quote_characters
, *scan
))
1756 /* Found start of a quoted string. */
1759 else if (strchr (gdb_completer_word_break_characters
, *scan
))
1773 #if STOP_SIGNAL == SIGTSTP
1774 signal (SIGTSTP
, SIG_DFL
);
1776 kill (getpid (), SIGTSTP
);
1777 signal (SIGTSTP
, stop_sig
);
1779 signal (STOP_SIGNAL
, stop_sig
);
1781 printf_unfiltered ("%s", prompt
);
1782 gdb_flush (gdb_stdout
);
1784 /* Forget about any previous command -- null line now will do nothing. */
1787 #endif /* STOP_SIGNAL */
1789 /* Initialize signal handlers. */
1799 signal (SIGINT
, request_quit
);
1801 /* If we initialize SIGQUIT to SIG_IGN, then the SIG_IGN will get
1802 passed to the inferior, which we don't want. It would be
1803 possible to do a "signal (SIGQUIT, SIG_DFL)" after we fork, but
1804 on BSD4.3 systems using vfork, that can affect the
1805 GDB process as well as the inferior (the signal handling tables
1806 might be in memory, shared between the two). Since we establish
1807 a handler for SIGQUIT, when we call exec it will set the signal
1808 to SIG_DFL for us. */
1809 signal (SIGQUIT
, do_nothing
);
1810 if (signal (SIGHUP
, do_nothing
) != SIG_IGN
)
1811 signal (SIGHUP
, disconnect
);
1812 signal (SIGFPE
, float_handler
);
1814 #if defined(SIGWINCH) && defined(SIGWINCH_HANDLER)
1815 signal (SIGWINCH
, SIGWINCH_HANDLER
);
1819 /* Read one line from the command input stream `instream'
1820 into the local static buffer `linebuffer' (whose current length
1822 The buffer is made bigger as necessary.
1823 Returns the address of the start of the line.
1825 NULL is returned for end of file.
1827 *If* the instream == stdin & stdin is a terminal, the line read
1828 is copied into the file line saver (global var char *line,
1829 length linesize) so that it can be duplicated.
1831 This routine either uses fancy command line editing or
1832 simple input as the user has requested. */
1835 command_line_input (prrompt
, repeat
, annotation_suffix
)
1838 char *annotation_suffix
;
1840 static char *linebuffer
= 0;
1841 static unsigned linelength
= 0;
1845 char *local_prompt
= prrompt
;
1850 /* The annotation suffix must be non-NULL. */
1851 if (annotation_suffix
== NULL
)
1852 annotation_suffix
= "";
1854 if (annotation_level
> 1 && instream
== stdin
)
1856 local_prompt
= alloca ((prrompt
== NULL
? 0 : strlen (prrompt
))
1857 + strlen (annotation_suffix
) + 40);
1858 if (prrompt
== NULL
)
1859 local_prompt
[0] = '\0';
1861 strcpy (local_prompt
, prrompt
);
1862 strcat (local_prompt
, "\n\032\032");
1863 strcat (local_prompt
, annotation_suffix
);
1864 strcat (local_prompt
, "\n");
1867 if (linebuffer
== 0)
1870 linebuffer
= (char *) xmalloc (linelength
);
1875 /* Control-C quits instantly if typed while in this loop
1876 since it should not wait until the user types a newline. */
1880 signal (STOP_SIGNAL
, stop_sig
);
1885 /* Make sure that all output has been output. Some machines may let
1886 you get away with leaving out some of the gdb_flush, but not all. */
1888 gdb_flush (gdb_stdout
);
1889 gdb_flush (gdb_stderr
);
1891 if (source_file_name
!= NULL
)
1893 ++source_line_number
;
1894 sprintf (source_error
,
1895 "%s%s:%d: Error in sourced command file:\n",
1898 source_line_number
);
1899 error_pre_print
= source_error
;
1902 if (annotation_level
> 1 && instream
== stdin
)
1904 printf_unfiltered ("\n\032\032pre-");
1905 printf_unfiltered (annotation_suffix
);
1906 printf_unfiltered ("\n");
1909 /* Don't use fancy stuff if not talking to stdin. */
1910 if (command_editing_p
&& instream
== stdin
1911 && ISATTY (instream
))
1912 rl
= readline (local_prompt
);
1914 rl
= gdb_readline (local_prompt
);
1916 if (annotation_level
> 1 && instream
== stdin
)
1918 printf_unfiltered ("\n\032\032post-");
1919 printf_unfiltered (annotation_suffix
);
1920 printf_unfiltered ("\n");
1923 if (!rl
|| rl
== (char *) EOF
)
1928 if (strlen(rl
) + 1 + (p
- linebuffer
) > linelength
)
1930 linelength
= strlen(rl
) + 1 + (p
- linebuffer
);
1931 nline
= (char *) xrealloc (linebuffer
, linelength
);
1932 p
+= nline
- linebuffer
;
1936 /* Copy line. Don't copy null at end. (Leaves line alone
1937 if this was just a newline) */
1941 free (rl
); /* Allocated in readline. */
1943 if (p
== linebuffer
|| *(p
- 1) != '\\')
1946 p
--; /* Put on top of '\'. */
1947 local_prompt
= (char *) 0;
1952 signal (STOP_SIGNAL
, SIG_DFL
);
1959 #define SERVER_COMMAND_LENGTH 7
1961 (p
- linebuffer
> SERVER_COMMAND_LENGTH
)
1962 && STREQN (linebuffer
, "server ", SERVER_COMMAND_LENGTH
);
1965 /* Note that we don't set `line'. Between this and the check in
1966 dont_repeat, this insures that repeating will still do the
1969 return linebuffer
+ SERVER_COMMAND_LENGTH
;
1972 /* Do history expansion if that is wished. */
1973 if (history_expansion_p
&& instream
== stdin
1974 && ISATTY (instream
))
1976 char *history_value
;
1979 *p
= '\0'; /* Insert null now. */
1980 expanded
= history_expand (linebuffer
, &history_value
);
1983 /* Print the changes. */
1984 printf_unfiltered ("%s\n", history_value
);
1986 /* If there was an error, call this function again. */
1989 free (history_value
);
1990 return command_line_input (prrompt
, repeat
, annotation_suffix
);
1992 if (strlen (history_value
) > linelength
)
1994 linelength
= strlen (history_value
) + 1;
1995 linebuffer
= (char *) xrealloc (linebuffer
, linelength
);
1997 strcpy (linebuffer
, history_value
);
1998 p
= linebuffer
+ strlen(linebuffer
);
1999 free (history_value
);
2003 /* If we just got an empty line, and that is supposed
2004 to repeat the previous command, return the value in the
2008 if (p
== linebuffer
)
2011 while (*p1
== ' ' || *p1
== '\t')
2019 /* Add line to history if appropriate. */
2020 if (instream
== stdin
2021 && ISATTY (stdin
) && *linebuffer
)
2022 add_history (linebuffer
);
2024 /* Note: lines consisting solely of comments are added to the command
2025 history. This is useful when you type a command, and then
2026 realize you don't want to execute it quite yet. You can comment
2027 out the command and then later fetch it from the value history
2028 and remove the '#'. The kill ring is probably better, but some
2029 people are in the habit of commenting things out. */
2031 while ((c
= *p1
++) != '\0')
2034 while ((c
= *p1
++) != '"')
2036 /* Make sure an escaped '"' doesn't make us think the string
2044 while ((c
= *p1
++) != '\'')
2046 /* Make sure an escaped '\'' doesn't make us think the string
2055 /* Found a comment. */
2061 /* Save into global buffer if appropriate. */
2064 if (linelength
> linesize
)
2066 line
= xrealloc (line
, linelength
);
2067 linesize
= linelength
;
2069 strcpy (line
, linebuffer
);
2077 /* Expand the body_list of COMMAND so that it can hold NEW_LENGTH
2078 code bodies. This is typically used when we encounter an "else"
2079 clause for an "if" command. */
2082 realloc_body_list (command
, new_length
)
2083 struct command_line
*command
;
2087 struct command_line
**body_list
;
2089 n
= command
->body_count
;
2091 /* Nothing to do? */
2092 if (new_length
<= n
)
2095 body_list
= (struct command_line
**)
2096 xmalloc (sizeof (struct command_line
*) * new_length
);
2098 memcpy (body_list
, command
->body_list
, sizeof (struct command_line
*) * n
);
2100 free (command
->body_list
);
2101 command
->body_list
= body_list
;
2102 command
->body_count
= new_length
;
2105 /* Read one line from the input stream. If the command is an "else" or
2106 "end", return such an indication to the caller. */
2108 static enum misc_command_type
2109 read_next_line (command
)
2110 struct command_line
**command
;
2112 char *p
, *p1
, *prompt_ptr
, control_prompt
[256];
2115 if (control_level
>= 254)
2116 error ("Control nesting too deep!\n");
2118 /* Set a prompt based on the nesting of the control commands. */
2119 if (instream
== stdin
)
2121 for (i
= 0; i
< control_level
; i
++)
2122 control_prompt
[i
] = ' ';
2123 control_prompt
[i
] = '>';
2124 control_prompt
[i
+1] = '\0';
2125 prompt_ptr
= (char *)&control_prompt
[0];
2130 p
= command_line_input (prompt_ptr
, instream
== stdin
, "commands");
2132 /* Not sure what to do here. */
2136 /* Strip leading and trailing whitespace. */
2137 while (*p
== ' ' || *p
== '\t')
2140 p1
= p
+ strlen (p
);
2141 while (p1
!= p
&& (p1
[-1] == ' ' || p1
[-1] == '\t'))
2144 /* Blanks and comments don't really do anything, but we need to
2145 distinguish them from else, end and other commands which can be
2147 if (p1
== p
|| p
[0] == '#')
2150 /* Is this the end of a simple, while, or if control structure? */
2151 if (p1
- p
== 3 && !strncmp (p
, "end", 3))
2154 /* Is the else clause of an if control structure? */
2155 if (p1
- p
== 4 && !strncmp (p
, "else", 4))
2156 return else_command
;
2158 /* Check for while, if, break, continue, etc and build a new command
2159 line structure for them. */
2160 if (p1
- p
> 5 && !strncmp (p
, "while", 5))
2161 *command
= build_command_line (while_control
, p
+ 6);
2162 else if (p1
- p
> 2 && !strncmp (p
, "if", 2))
2163 *command
= build_command_line (if_control
, p
+ 3);
2164 else if (p1
- p
== 5 && !strncmp (p
, "loop_break", 5))
2166 *command
= (struct command_line
*)
2167 xmalloc (sizeof (struct command_line
));
2168 (*command
)->next
= NULL
;
2169 (*command
)->line
= NULL
;
2170 (*command
)->control_type
= break_control
;
2171 (*command
)->body_count
= 0;
2172 (*command
)->body_list
= NULL
;
2174 else if (p1
- p
== 8 && !strncmp (p
, "loop_continue", 8))
2176 *command
= (struct command_line
*)
2177 xmalloc (sizeof (struct command_line
));
2178 (*command
)->next
= NULL
;
2179 (*command
)->line
= NULL
;
2180 (*command
)->control_type
= continue_control
;
2181 (*command
)->body_count
= 0;
2182 (*command
)->body_list
= NULL
;
2186 /* A normal command. */
2187 *command
= (struct command_line
*)
2188 xmalloc (sizeof (struct command_line
));
2189 (*command
)->next
= NULL
;
2190 (*command
)->line
= savestring (p
, p1
- p
);
2191 (*command
)->control_type
= simple_control
;
2192 (*command
)->body_count
= 0;
2193 (*command
)->body_list
= NULL
;
2196 /* Nothing special. */
2200 /* Recursively read in the control structures and create a command_line
2203 The parent_control parameter is the control structure in which the
2204 following commands are nested. */
2206 static enum command_control_type
2207 recurse_read_control_structure (current_cmd
)
2208 struct command_line
*current_cmd
;
2210 int current_body
, i
;
2211 enum misc_command_type val
;
2212 enum command_control_type ret
;
2213 struct command_line
**body_ptr
, *child_tail
, *next
;
2214 struct cleanup
*old_chains
, *tmp_chains
;
2220 /* Sanity checks. */
2221 if (current_cmd
->control_type
== simple_control
)
2223 error ("Recursed on a simple control type\n");
2224 return invalid_control
;
2227 if (current_body
> current_cmd
->body_count
)
2229 error ("Allocated body is smaller than this command type needs\n");
2230 return invalid_control
;
2233 /* Read lines from the input stream and build control structures. */
2239 val
= read_next_line (&next
);
2241 /* Just skip blanks and comments. */
2242 if (val
== nop_command
)
2245 if (val
== end_command
)
2247 if (current_cmd
->control_type
== while_control
2248 || current_cmd
->control_type
== if_control
)
2250 /* Success reading an entire control structure. */
2251 ret
= simple_control
;
2256 ret
= invalid_control
;
2261 /* Not the end of a control structure. */
2262 if (val
== else_command
)
2264 if (current_cmd
->control_type
== if_control
2265 && current_body
== 1)
2267 realloc_body_list (current_cmd
, 2);
2274 ret
= invalid_control
;
2281 child_tail
->next
= next
;
2285 /* We have just read the first line of the child's control
2286 structure. From now on, arrange to throw away the line
2287 we have if we quit or get an error. */
2288 body_ptr
= current_cmd
->body_list
;
2289 for (i
= 1; i
< current_body
; i
++)
2294 tmp_chains
= make_cleanup (free_command_lines
, body_ptr
);
2297 old_chains
= tmp_chains
;
2302 /* If the latest line is another control structure, then recurse
2304 if (next
->control_type
== while_control
2305 || next
->control_type
== if_control
)
2308 ret
= recurse_read_control_structure (next
);
2311 if (ret
!= simple_control
)
2317 if (ret
== invalid_control
&& old_chains
)
2318 do_cleanups (old_chains
);
2319 else if (old_chains
)
2320 discard_cleanups (old_chains
);
2326 /* Read lines from the input stream
2327 and accumulate them in a chain of struct command_line's
2328 which is then returned. */
2330 struct command_line
*
2331 read_command_lines ()
2333 struct command_line
*head
, *tail
, *next
;
2334 struct cleanup
*old_chain
;
2335 enum command_control_type ret
;
2336 enum misc_command_type val
;
2343 val
= read_next_line (&next
);
2345 /* Ignore blank lines or comments. */
2346 if (val
== nop_command
)
2349 if (val
== end_command
)
2351 ret
= simple_control
;
2355 if (val
!= ok_command
)
2357 ret
= invalid_control
;
2361 if (next
->control_type
== while_control
2362 || next
->control_type
== if_control
)
2365 ret
= recurse_read_control_structure (next
);
2368 if (ret
== invalid_control
)
2379 old_chain
= make_cleanup (free_command_lines
, &head
);
2388 if (ret
!= invalid_control
)
2390 discard_cleanups (old_chain
);
2394 do_cleanups (old_chain
);
2400 /* Free a chain of struct command_line's. */
2403 free_command_lines (lptr
)
2404 struct command_line
**lptr
;
2406 register struct command_line
*l
= *lptr
;
2407 register struct command_line
*next
;
2408 struct command_line
**blist
;
2413 if (l
->body_count
> 0)
2415 blist
= l
->body_list
;
2416 for (i
= 0; i
< l
->body_count
; i
++, blist
++)
2417 free_command_lines (blist
);
2426 /* Add an element to the list of info subcommands. */
2429 add_info (name
, fun
, doc
)
2431 void (*fun
) PARAMS ((char *, int));
2434 add_cmd (name
, no_class
, fun
, doc
, &infolist
);
2437 /* Add an alias to the list of info subcommands. */
2440 add_info_alias (name
, oldname
, abbrev_flag
)
2445 add_alias_cmd (name
, oldname
, 0, abbrev_flag
, &infolist
);
2448 /* The "info" command is defined as a prefix, with allow_unknown = 0.
2449 Therefore, its own definition is called only for "info" with no args. */
2453 info_command (arg
, from_tty
)
2457 printf_unfiltered ("\"info\" must be followed by the name of an info command.\n");
2458 help_list (infolist
, "info ", -1, gdb_stdout
);
2461 /* The "complete" command is used by Emacs to implement completion. */
2465 complete_command (arg
, from_tty
)
2477 argpoint
= strlen (arg
);
2479 for (completion
= line_completion_function (arg
, i
= 0, arg
, argpoint
);
2481 completion
= line_completion_function (arg
, ++i
, arg
, argpoint
))
2483 printf_unfiltered ("%s\n", completion
);
2488 /* The "show" command with no arguments shows all the settings. */
2492 show_command (arg
, from_tty
)
2496 cmd_show_list (showlist
, from_tty
, "");
2499 /* Add an element to the list of commands. */
2502 add_com (name
, class, fun
, doc
)
2504 enum command_class
class;
2505 void (*fun
) PARAMS ((char *, int));
2508 add_cmd (name
, class, fun
, doc
, &cmdlist
);
2511 /* Add an alias or abbreviation command to the list of commands. */
2514 add_com_alias (name
, oldname
, class, abbrev_flag
)
2517 enum command_class
class;
2520 add_alias_cmd (name
, oldname
, class, abbrev_flag
, &cmdlist
);
2527 error ("Argument required (%s).", why
);
2532 help_command (command
, from_tty
)
2534 int from_tty
; /* Ignored */
2536 help_cmd (command
, gdb_stdout
);
2540 validate_comname (comname
)
2546 error_no_arg ("name of command to define");
2551 if (!isalnum(*p
) && *p
!= '-')
2552 error ("Junk in argument list: \"%s\"", p
);
2557 /* This is just a placeholder in the command data structures. */
2559 user_defined_command (ignore
, from_tty
)
2566 define_command (comname
, from_tty
)
2570 register struct command_line
*cmds
;
2571 register struct cmd_list_element
*c
, *newc
, *hookc
= 0;
2572 char *tem
= comname
;
2573 #define HOOK_STRING "hook-"
2576 validate_comname (comname
);
2578 /* Look it up, and verify that we got an exact match. */
2579 c
= lookup_cmd (&tem
, cmdlist
, "", -1, 1);
2580 if (c
&& !STREQ (comname
, c
->name
))
2585 if (c
->class == class_user
|| c
->class == class_alias
)
2586 tem
= "Redefine command \"%s\"? ";
2588 tem
= "Really redefine built-in command \"%s\"? ";
2589 if (!query (tem
, c
->name
))
2590 error ("Command \"%s\" not redefined.", c
->name
);
2593 /* If this new command is a hook, then mark the command which it
2594 is hooking. Note that we allow hooking `help' commands, so that
2595 we can hook the `stop' pseudo-command. */
2597 if (!strncmp (comname
, HOOK_STRING
, HOOK_LEN
))
2599 /* Look up cmd it hooks, and verify that we got an exact match. */
2600 tem
= comname
+HOOK_LEN
;
2601 hookc
= lookup_cmd (&tem
, cmdlist
, "", -1, 0);
2602 if (hookc
&& !STREQ (comname
+HOOK_LEN
, hookc
->name
))
2606 warning ("Your new `%s' command does not hook any existing command.",
2608 if (!query ("Proceed? ", (char *)0))
2609 error ("Not confirmed.");
2613 comname
= savestring (comname
, strlen (comname
));
2615 /* If the rest of the commands will be case insensitive, this one
2616 should behave in the same manner. */
2617 for (tem
= comname
; *tem
; tem
++)
2618 if (isupper(*tem
)) *tem
= tolower(*tem
);
2622 printf_unfiltered ("Type commands for definition of \"%s\".\n\
2623 End with a line saying just \"end\".\n", comname
);
2624 gdb_flush (gdb_stdout
);
2628 cmds
= read_command_lines ();
2630 if (c
&& c
->class == class_user
)
2631 free_command_lines (&c
->user_commands
);
2633 newc
= add_cmd (comname
, class_user
, user_defined_command
,
2634 (c
&& c
->class == class_user
)
2635 ? c
->doc
: savestring ("User-defined.", 13), &cmdlist
);
2636 newc
->user_commands
= cmds
;
2638 /* If this new command is a hook, then mark both commands as being
2642 hookc
->hook
= newc
; /* Target gets hooked. */
2643 newc
->hookee
= hookc
; /* We are marked as hooking target cmd. */
2648 document_command (comname
, from_tty
)
2652 struct command_line
*doclines
;
2653 register struct cmd_list_element
*c
;
2654 char *tem
= comname
;
2656 validate_comname (comname
);
2658 c
= lookup_cmd (&tem
, cmdlist
, "", 0, 1);
2660 if (c
->class != class_user
)
2661 error ("Command \"%s\" is built-in.", comname
);
2664 printf_unfiltered ("Type documentation for \"%s\".\n\
2665 End with a line saying just \"end\".\n", comname
);
2667 doclines
= read_command_lines ();
2669 if (c
->doc
) free (c
->doc
);
2672 register struct command_line
*cl1
;
2673 register int len
= 0;
2675 for (cl1
= doclines
; cl1
; cl1
= cl1
->next
)
2676 len
+= strlen (cl1
->line
) + 1;
2678 c
->doc
= (char *) xmalloc (len
+ 1);
2681 for (cl1
= doclines
; cl1
; cl1
= cl1
->next
)
2683 strcat (c
->doc
, cl1
->line
);
2685 strcat (c
->doc
, "\n");
2689 free_command_lines (&doclines
);
2693 print_gnu_advertisement ()
2695 printf_unfiltered ("\
2696 GDB is free software and you are welcome to distribute copies of it\n\
2697 under certain conditions; type \"show copying\" to see the conditions.\n\
2698 There is absolutely no warranty for GDB; type \"show warranty\" for details.\n\
2703 print_gdb_version (stream
)
2706 fprintf_filtered (stream
, "\
2707 GDB %s (%s", version
, host_name
);
2709 if (!STREQ (host_name
, target_name
))
2710 fprintf_filtered (stream
, " --target %s", target_name
);
2712 fprintf_filtered (stream
, "), ");
2714 fprintf_filtered (stream
, "Copyright 1995 Free Software Foundation, Inc.");
2719 show_version (args
, from_tty
)
2724 print_gnu_advertisement ();
2725 print_gdb_version (gdb_stdout
);
2726 printf_filtered ("\n");
2730 /* xgdb calls this to reprint the usual GDB prompt. Obsolete now that xgdb
2736 printf_unfiltered ("%s", prompt
);
2737 gdb_flush (gdb_stdout
);
2741 quit_command (args
, from_tty
)
2745 if (inferior_pid
!= 0 && target_has_execution
)
2749 if (query ("The program is running. Quit anyway (and detach it)? "))
2750 target_detach (args
, from_tty
);
2752 error ("Not confirmed.");
2756 if (query ("The program is running. Quit anyway (and kill it)? "))
2759 error ("Not confirmed.");
2762 /* UDI wants this, to kill the TIP. */
2765 /* Save the history information if it is appropriate to do so. */
2766 if (write_history_p
&& history_filename
)
2767 write_history (history_filename
);
2772 /* Returns whether GDB is running on a terminal and whether the user
2773 desires that questions be asked of them on that terminal. */
2776 input_from_terminal_p ()
2778 return gdb_has_a_terminal () && (instream
== stdin
) & caution
;
2783 pwd_command (args
, from_tty
)
2787 if (args
) error ("The \"pwd\" command does not take an argument: %s", args
);
2788 getcwd (gdb_dirbuf
, sizeof (gdb_dirbuf
));
2790 if (!STREQ (gdb_dirbuf
, current_directory
))
2791 printf_unfiltered ("Working directory %s\n (canonically %s).\n",
2792 current_directory
, gdb_dirbuf
);
2794 printf_unfiltered ("Working directory %s.\n", current_directory
);
2798 cd_command (dir
, from_tty
)
2803 /* Found something other than leading repetitions of "/..". */
2804 int found_real_path
;
2807 /* If the new directory is absolute, repeat is a no-op; if relative,
2808 repeat might be useful but is more likely to be a mistake. */
2812 error_no_arg ("new working directory");
2814 dir
= tilde_expand (dir
);
2815 make_cleanup (free
, dir
);
2817 if (chdir (dir
) < 0)
2818 perror_with_name (dir
);
2821 dir
= savestring (dir
, len
- (len
> 1 && dir
[len
-1] == '/'));
2823 current_directory
= dir
;
2826 if (current_directory
[0] == '/' && current_directory
[1] == '\0')
2827 current_directory
= concat (current_directory
, dir
, NULL
);
2829 current_directory
= concat (current_directory
, "/", dir
, NULL
);
2833 /* Now simplify any occurrences of `.' and `..' in the pathname. */
2835 found_real_path
= 0;
2836 for (p
= current_directory
; *p
;)
2838 if (p
[0] == '/' && p
[1] == '.' && (p
[2] == 0 || p
[2] == '/'))
2840 else if (p
[0] == '/' && p
[1] == '.' && p
[2] == '.'
2841 && (p
[3] == 0 || p
[3] == '/'))
2843 if (found_real_path
)
2845 /* Search backwards for the directory just before the "/.."
2846 and obliterate it and the "/..". */
2848 while (q
!= current_directory
&& q
[-1] != '/')
2851 if (q
== current_directory
)
2852 /* current_directory is
2853 a relative pathname ("can't happen"--leave it alone). */
2857 strcpy (q
- 1, p
+ 3);
2862 /* We are dealing with leading repetitions of "/..", for example
2863 "/../..", which is the Mach super-root. */
2868 found_real_path
= 1;
2873 forget_cached_source_info ();
2876 pwd_command ((char *) 0, 1);
2879 struct source_cleanup_lines_args
{
2882 char *old_pre_error
;
2883 char *old_error_pre_print
;
2887 source_cleanup_lines (args
)
2890 struct source_cleanup_lines_args
*p
=
2891 (struct source_cleanup_lines_args
*)args
;
2892 source_line_number
= p
->old_line
;
2893 source_file_name
= p
->old_file
;
2894 source_pre_error
= p
->old_pre_error
;
2895 error_pre_print
= p
->old_error_pre_print
;
2900 source_command (args
, from_tty
)
2905 struct cleanup
*old_cleanups
;
2907 struct source_cleanup_lines_args old_lines
;
2912 error ("source command requires pathname of file to source.");
2915 file
= tilde_expand (file
);
2916 old_cleanups
= make_cleanup (free
, file
);
2918 stream
= fopen (file
, FOPEN_RT
);
2920 perror_with_name (file
);
2922 make_cleanup (fclose
, stream
);
2924 old_lines
.old_line
= source_line_number
;
2925 old_lines
.old_file
= source_file_name
;
2926 old_lines
.old_pre_error
= source_pre_error
;
2927 old_lines
.old_error_pre_print
= error_pre_print
;
2928 make_cleanup (source_cleanup_lines
, &old_lines
);
2929 source_line_number
= 0;
2930 source_file_name
= file
;
2931 source_pre_error
= error_pre_print
== NULL
? "" : error_pre_print
;
2932 source_pre_error
= savestring (source_pre_error
, strlen (source_pre_error
));
2933 make_cleanup (free
, source_pre_error
);
2934 /* This will get set every time we read a line. So it won't stay "" for
2936 error_pre_print
= "";
2938 needed_length
= strlen (source_file_name
) + strlen (source_pre_error
) + 80;
2939 if (source_error_allocated
< needed_length
)
2941 source_error_allocated
*= 2;
2942 if (source_error_allocated
< needed_length
)
2943 source_error_allocated
= needed_length
;
2944 if (source_error
== NULL
)
2945 source_error
= xmalloc (source_error_allocated
);
2947 source_error
= xrealloc (source_error
, source_error_allocated
);
2950 read_command_file (stream
);
2952 do_cleanups (old_cleanups
);
2957 echo_command (text
, from_tty
)
2965 while ((c
= *p
++) != '\0')
2969 /* \ at end of argument is used after spaces
2970 so they won't be lost. */
2974 c
= parse_escape (&p
);
2976 printf_filtered ("%c", c
);
2979 printf_filtered ("%c", c
);
2982 /* Force this output to appear now. */
2984 gdb_flush (gdb_stdout
);
2988 #ifdef TARGET_BYTE_ORDER_SELECTABLE
2990 /* Functions to manipulate the endianness of the target. */
2992 #ifndef TARGET_BYTE_ORDER_DEFAULT
2993 #define TARGET_BYTE_ORDER_DEFAULT BIG_ENDIAN
2996 int target_byte_order
= TARGET_BYTE_ORDER_DEFAULT
;
2998 static int target_byte_order_auto
= 1;
3000 /* Called if the user enters ``set endian'' without an argument. */
3002 set_endian (args
, from_tty
)
3006 printf_unfiltered ("\"set endian\" must be followed by \"auto\", \"big\" or \"little\".\n");
3007 show_endian (args
, from_tty
);
3010 /* Called by ``set endian big''. */
3012 set_endian_big (args
, from_tty
)
3016 target_byte_order
= BIG_ENDIAN
;
3017 target_byte_order_auto
= 0;
3020 /* Called by ``set endian little''. */
3022 set_endian_little (args
, from_tty
)
3026 target_byte_order
= LITTLE_ENDIAN
;
3027 target_byte_order_auto
= 0;
3030 /* Called by ``set endian auto''. */
3032 set_endian_auto (args
, from_tty
)
3036 target_byte_order_auto
= 1;
3039 /* Called by ``show endian''. */
3041 show_endian (args
, from_tty
)
3046 (target_byte_order_auto
3047 ? "The target endianness is set automatically (currently %s endian)\n"
3048 : "The target is assumed to be %s endian\n");
3049 printf_unfiltered (msg
, TARGET_BYTE_ORDER
== BIG_ENDIAN
? "big" : "little");
3052 #endif /* defined (TARGET_BYTE_ORDER_SELECTABLE) */
3054 /* Set the endianness from a BFD. */
3056 set_endian_from_file (abfd
)
3059 #ifdef TARGET_BYTE_ORDER_SELECTABLE
3062 if (abfd
->xvec
->byteorder_big_p
)
3065 want
= LITTLE_ENDIAN
;
3066 if (target_byte_order_auto
)
3067 target_byte_order
= want
;
3068 else if (target_byte_order
!= want
)
3069 warning ("%s endian file does not match %s endian target.",
3070 want
== BIG_ENDIAN
? "big" : "little",
3071 TARGET_BYTE_ORDER
== BIG_ENDIAN
? "big" : "little");
3073 #else /* ! defined (TARGET_BYTE_ORDER_SELECTABLE) */
3075 if (abfd
->xvec
->byteorder_big_p
3076 ? TARGET_BYTE_ORDER
!= BIG_ENDIAN
3077 : TARGET_BYTE_ORDER
== BIG_ENDIAN
)
3078 warning ("%s endian file does not match %s endian target.",
3079 abfd
->xvec
->byteorder_big_p
? "big" : "little",
3080 TARGET_BYTE_ORDER
== BIG_ENDIAN
? "big" : "little");
3082 #endif /* ! defined (TARGET_BYTE_ORDER_SELECTABLE) */
3085 /* Functions to manipulate command line editing control variables. */
3087 /* Number of commands to print in each call to show_commands. */
3088 #define Hist_print 10
3090 show_commands (args
, from_tty
)
3094 /* Index for history commands. Relative to history_base. */
3097 /* Number of the history entry which we are planning to display next.
3098 Relative to history_base. */
3101 /* The first command in the history which doesn't exist (i.e. one more
3102 than the number of the last command). Relative to history_base. */
3105 extern HIST_ENTRY
*history_get
PARAMS ((int));
3107 /* Print out some of the commands from the command history. */
3108 /* First determine the length of the history list. */
3109 hist_len
= history_size
;
3110 for (offset
= 0; offset
< history_size
; offset
++)
3112 if (!history_get (history_base
+ offset
))
3121 if (args
[0] == '+' && args
[1] == '\0')
3122 /* "info editing +" should print from the stored position. */
3125 /* "info editing <exp>" should print around command number <exp>. */
3126 num
= (parse_and_eval_address (args
) - history_base
) - Hist_print
/ 2;
3128 /* "show commands" means print the last Hist_print commands. */
3131 num
= hist_len
- Hist_print
;
3137 /* If there are at least Hist_print commands, we want to display the last
3138 Hist_print rather than, say, the last 6. */
3139 if (hist_len
- num
< Hist_print
)
3141 num
= hist_len
- Hist_print
;
3146 for (offset
= num
; offset
< num
+ Hist_print
&& offset
< hist_len
; offset
++)
3148 printf_filtered ("%5d %s\n", history_base
+ offset
,
3149 (history_get (history_base
+ offset
))->line
);
3152 /* The next command we want to display is the next one that we haven't
3156 /* If the user repeats this command with return, it should do what
3157 "show commands +" does. This is unnecessary if arg is null,
3158 because "show commands +" is not useful after "show commands". */
3159 if (from_tty
&& args
)
3166 /* Called by do_setshow_command. */
3169 set_history_size_command (args
, from_tty
, c
)
3172 struct cmd_list_element
*c
;
3174 if (history_size
== INT_MAX
)
3175 unstifle_history ();
3176 else if (history_size
>= 0)
3177 stifle_history (history_size
);
3180 history_size
= INT_MAX
;
3181 error ("History size must be non-negative");
3187 set_history (args
, from_tty
)
3191 printf_unfiltered ("\"set history\" must be followed by the name of a history subcommand.\n");
3192 help_list (sethistlist
, "set history ", -1, gdb_stdout
);
3197 show_history (args
, from_tty
)
3201 cmd_show_list (showhistlist
, from_tty
, "");
3204 int info_verbose
= 0; /* Default verbose msgs off */
3206 /* Called by do_setshow_command. An elaborate joke. */
3209 set_verbose (args
, from_tty
, c
)
3212 struct cmd_list_element
*c
;
3214 char *cmdname
= "verbose";
3215 struct cmd_list_element
*showcmd
;
3217 showcmd
= lookup_cmd_1 (&cmdname
, showlist
, NULL
, 1);
3221 c
->doc
= "Set verbose printing of informational messages.";
3222 showcmd
->doc
= "Show verbose printing of informational messages.";
3226 c
->doc
= "Set verbosity.";
3227 showcmd
->doc
= "Show verbosity.";
3232 float_handler (signo
)
3235 /* This message is based on ANSI C, section 4.7. Note that integer
3236 divide by zero causes this, so "float" is a misnomer. */
3237 signal (SIGFPE
, float_handler
);
3238 error ("Erroneous arithmetic operation.");
3250 enablebreaklist
= NULL
;
3254 #ifdef TARGET_BYTE_ORDER_SELECTABLE
3258 showhistlist
= NULL
;
3259 unsethistlist
= NULL
;
3260 #if MAINTENANCE_CMDS
3261 maintenancelist
= NULL
;
3262 maintenanceinfolist
= NULL
;
3263 maintenanceprintlist
= NULL
;
3265 setprintlist
= NULL
;
3266 showprintlist
= NULL
;
3267 setchecklist
= NULL
;
3268 showchecklist
= NULL
;
3271 /* Init the history buffer. Note that we are called after the init file(s)
3272 * have been read so that the user can change the history file via his
3273 * .gdbinit file (for instance). The GDBHISTFILE environment variable
3274 * overrides all of this.
3282 tmpenv
= getenv ("HISTSIZE");
3284 history_size
= atoi (tmpenv
);
3285 else if (!history_size
)
3288 stifle_history (history_size
);
3290 tmpenv
= getenv ("GDBHISTFILE");
3292 history_filename
= savestring (tmpenv
, strlen(tmpenv
));
3293 else if (!history_filename
) {
3294 /* We include the current directory so that if the user changes
3295 directories the file written will be the same as the one
3297 history_filename
= concat (current_directory
, "/.gdb_history", NULL
);
3299 read_history (history_filename
);
3305 struct cmd_list_element
*c
;
3307 #ifdef TARGET_BYTE_ORDER_SELECTABLE
3309 add_prefix_cmd ("endian", class_support
, set_endian
,
3310 "Set endianness of target.",
3311 &endianlist
, "set endian ", 0, &setlist
);
3312 add_cmd ("big", class_support
, set_endian_big
,
3313 "Set target as being big endian.", &endianlist
);
3314 add_cmd ("little", class_support
, set_endian_little
,
3315 "Set target as being little endian.", &endianlist
);
3316 add_cmd ("auto", class_support
, set_endian_auto
,
3317 "Select target endianness automatically.", &endianlist
);
3318 add_cmd ("endian", class_support
, show_endian
,
3319 "Show endianness of target.", &showlist
);
3321 #endif /* defined (TARGET_BYTE_ORDER_SELECTABLE) */
3323 #ifdef DEFAULT_PROMPT
3324 prompt
= savestring (DEFAULT_PROMPT
, strlen(DEFAULT_PROMPT
));
3326 prompt
= savestring ("(gdb) ", 6);
3329 /* Set the important stuff up for command editing. */
3330 command_editing_p
= 1;
3331 history_expansion_p
= 0;
3332 write_history_p
= 0;
3334 /* Setup important stuff for command line editing. */
3335 rl_completion_entry_function
= (int (*)()) readline_line_completion_function
;
3336 rl_completer_word_break_characters
= gdb_completer_word_break_characters
;
3337 rl_completer_quote_characters
= gdb_completer_quote_characters
;
3338 rl_readline_name
= "gdb";
3340 /* Define the classes of commands.
3341 They will appear in the help list in the reverse of this order. */
3343 add_cmd ("internals", class_maintenance
, NO_FUNCTION
,
3344 "Maintenance commands.\n\
3345 Some gdb commands are provided just for use by gdb maintainers.\n\
3346 These commands are subject to frequent change, and may not be as\n\
3347 well documented as user commands.",
3349 add_cmd ("obscure", class_obscure
, NO_FUNCTION
, "Obscure features.", &cmdlist
);
3350 add_cmd ("aliases", class_alias
, NO_FUNCTION
, "Aliases of other commands.", &cmdlist
);
3351 add_cmd ("user-defined", class_user
, NO_FUNCTION
, "User-defined commands.\n\
3352 The commands in this class are those defined by the user.\n\
3353 Use the \"define\" command to define a command.", &cmdlist
);
3354 add_cmd ("support", class_support
, NO_FUNCTION
, "Support facilities.", &cmdlist
);
3355 add_cmd ("status", class_info
, NO_FUNCTION
, "Status inquiries.", &cmdlist
);
3356 add_cmd ("files", class_files
, NO_FUNCTION
, "Specifying and examining files.", &cmdlist
);
3357 add_cmd ("breakpoints", class_breakpoint
, NO_FUNCTION
, "Making program stop at certain points.", &cmdlist
);
3358 add_cmd ("data", class_vars
, NO_FUNCTION
, "Examining data.", &cmdlist
);
3359 add_cmd ("stack", class_stack
, NO_FUNCTION
, "Examining the stack.\n\
3360 The stack is made up of stack frames. Gdb assigns numbers to stack frames\n\
3361 counting from zero for the innermost (currently executing) frame.\n\n\
3362 At any time gdb identifies one frame as the \"selected\" frame.\n\
3363 Variable lookups are done with respect to the selected frame.\n\
3364 When the program being debugged stops, gdb selects the innermost frame.\n\
3365 The commands below can be used to select other frames by number or address.",
3367 add_cmd ("running", class_run
, NO_FUNCTION
, "Running the program.", &cmdlist
);
3369 add_com ("pwd", class_files
, pwd_command
,
3370 "Print working directory. This is used for your program as well.");
3371 c
= add_cmd ("cd", class_files
, cd_command
,
3372 "Set working directory to DIR for debugger and program being debugged.\n\
3373 The change does not take effect for the program being debugged\n\
3374 until the next time it is started.", &cmdlist
);
3375 c
->completer
= filename_completer
;
3378 (add_set_cmd ("prompt", class_support
, var_string
, (char *)&prompt
,
3383 add_com ("echo", class_support
, echo_command
,
3384 "Print a constant string. Give string as argument.\n\
3385 C escape sequences may be used in the argument.\n\
3386 No newline is added at the end of the argument;\n\
3387 use \"\\n\" if you want a newline to be printed.\n\
3388 Since leading and trailing whitespace are ignored in command arguments,\n\
3389 if you want to print some you must use \"\\\" before leading whitespace\n\
3390 to be printed or after trailing whitespace.");
3391 add_com ("document", class_support
, document_command
,
3392 "Document a user-defined command.\n\
3393 Give command name as argument. Give documentation on following lines.\n\
3394 End with a line of just \"end\".");
3395 add_com ("define", class_support
, define_command
,
3396 "Define a new command name. Command name is argument.\n\
3397 Definition appears on following lines, one command per line.\n\
3398 End with a line of just \"end\".\n\
3399 Use the \"document\" command to give documentation for the new command.\n\
3400 Commands defined in this way may have up to ten arguments.");
3403 c
= add_cmd ("source", class_support
, source_command
,
3404 "Read commands from a file named FILE.\n\
3405 Note that the file \"" GDBINIT_FILENAME
"\" is read automatically in this way\n\
3406 when gdb is started.", &cmdlist
);
3408 /* Punt file name, we can't help it easily. */
3409 c
= add_cmd ("source", class_support
, source_command
,
3410 "Read commands from a file named FILE.\n\
3411 Note that the file \".gdbinit\" is read automatically in this way\n\
3412 when gdb is started.", &cmdlist
);
3414 c
->completer
= filename_completer
;
3416 add_com ("quit", class_support
, quit_command
, "Exit gdb.");
3417 add_com ("help", class_support
, help_command
, "Print list of commands.");
3418 add_com_alias ("q", "quit", class_support
, 1);
3419 add_com_alias ("h", "help", class_support
, 1);
3422 c
= add_set_cmd ("verbose", class_support
, var_boolean
, (char *)&info_verbose
,
3425 add_show_from_set (c
, &showlist
);
3426 c
->function
.sfunc
= set_verbose
;
3427 set_verbose (NULL
, 0, c
);
3430 (add_set_cmd ("editing", class_support
, var_boolean
, (char *)&command_editing_p
,
3431 "Set editing of command lines as they are typed.\n\
3432 Use \"on\" to enable to enable the editing, and \"off\" to disable it.\n\
3433 Without an argument, command line editing is enabled. To edit, use\n\
3434 EMACS-like or VI-like commands like control-P or ESC.", &setlist
),
3437 add_prefix_cmd ("history", class_support
, set_history
,
3438 "Generic command for setting command history parameters.",
3439 &sethistlist
, "set history ", 0, &setlist
);
3440 add_prefix_cmd ("history", class_support
, show_history
,
3441 "Generic command for showing command history parameters.",
3442 &showhistlist
, "show history ", 0, &showlist
);
3445 (add_set_cmd ("expansion", no_class
, var_boolean
, (char *)&history_expansion_p
,
3446 "Set history expansion on command input.\n\
3447 Without an argument, history expansion is enabled.", &sethistlist
),
3451 (add_set_cmd ("save", no_class
, var_boolean
, (char *)&write_history_p
,
3452 "Set saving of the history record on exit.\n\
3453 Use \"on\" to enable to enable the saving, and \"off\" to disable it.\n\
3454 Without an argument, saving is enabled.", &sethistlist
),
3457 c
= add_set_cmd ("size", no_class
, var_integer
, (char *)&history_size
,
3458 "Set the size of the command history, \n\
3459 ie. the number of previous commands to keep a record of.", &sethistlist
);
3460 add_show_from_set (c
, &showhistlist
);
3461 c
->function
.sfunc
= set_history_size_command
;
3464 (add_set_cmd ("filename", no_class
, var_filename
, (char *)&history_filename
,
3465 "Set the filename in which to record the command history\n\
3466 (the list of previous commands of which a record is kept).", &sethistlist
),
3470 (add_set_cmd ("confirm", class_support
, var_boolean
,
3472 "Set whether to confirm potentially dangerous operations.",
3476 add_prefix_cmd ("info", class_info
, info_command
,
3477 "Generic command for showing things about the program being debugged.",
3478 &infolist
, "info ", 0, &cmdlist
);
3479 add_com_alias ("i", "info", class_info
, 1);
3481 add_com ("complete", class_obscure
, complete_command
,
3482 "List the completions for the rest of the line as a command.");
3484 add_prefix_cmd ("show", class_info
, show_command
,
3485 "Generic command for showing things about the debugger.",
3486 &showlist
, "show ", 0, &cmdlist
);
3487 /* Another way to get at the same thing. */
3488 add_info ("set", show_command
, "Show all GDB settings.");
3490 add_cmd ("commands", no_class
, show_commands
,
3491 "Show the the history of commands you typed.\n\
3492 You can supply a command number to start with, or a `+' to start after\n\
3493 the previous command number shown.",
3496 add_cmd ("version", no_class
, show_version
,
3497 "Show what version of GDB this is.", &showlist
);
3499 add_com ("while", class_support
, while_command
,
3500 "Execute nested commands WHILE the conditional expression is non zero.\n\
3501 The conditional expression must follow the word `while' and must in turn be\
3502 followed by a new line. The nested commands must be entered one per line,\
3503 and should be terminated by the word `end'.");
3505 add_com ("if", class_support
, if_command
,
3506 "Execute nested commands once IF the conditional expression is non zero.\n\
3507 The conditional expression must follow the word `if' and must in turn be\
3508 followed by a new line. The nested commands must be entered one per line,\
3509 and should be terminated by the word 'else' or `end'. If an else clause\
3510 is used, the same rules apply to its nested commands as to the first ones.");
3512 /* If target is open when baud changes, it doesn't take effect until the
3513 next open (I think, not sure). */
3514 add_show_from_set (add_set_cmd ("remotebaud", no_class
,
3515 var_zinteger
, (char *)&baud_rate
,
3516 "Set baud rate for remote serial I/O.\n\
3517 This value is used to set the speed of the serial port when debugging\n\
3518 using remote targets.", &setlist
),
3522 add_set_cmd ("remotedebug", no_class
, var_zinteger
, (char *)&remote_debug
,
3523 "Set debugging of remote protocol.\n\
3524 When enabled, each packet sent or received with the remote target\n\
3525 is displayed.", &setlist
),