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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, 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>
50 #include "gdb_string.h"
54 #include <sys/param.h>
58 extern void initialize_targets
PARAMS ((void));
60 extern void initialize_utils
PARAMS ((void));
62 /* Prototypes for local functions */
64 static char * line_completion_function
PARAMS ((char *, int, char *, int));
66 static char * readline_line_completion_function
PARAMS ((char *, int));
68 static void command_loop_marker
PARAMS ((int));
70 static void while_command
PARAMS ((char *, int));
72 static void if_command
PARAMS ((char *, int));
74 static struct command_line
*
75 build_command_line
PARAMS ((enum command_control_type
, char *));
77 static struct command_line
*
78 get_command_line
PARAMS ((enum command_control_type
, char *));
80 static void realloc_body_list
PARAMS ((struct command_line
*, int));
82 static enum misc_command_type read_next_line
PARAMS ((struct command_line
**));
84 static enum command_control_type
85 recurse_read_control_structure
PARAMS ((struct command_line
*));
87 static struct cleanup
* setup_user_args
PARAMS ((char *));
89 static char * locate_arg
PARAMS ((char *));
91 static char * insert_args
PARAMS ((char *));
93 static void arg_cleanup
PARAMS ((void));
95 static void init_main
PARAMS ((void));
97 static void init_cmd_lists
PARAMS ((void));
99 static void float_handler
PARAMS ((int));
101 static void init_signals
PARAMS ((void));
103 static void set_verbose
PARAMS ((char *, int, struct cmd_list_element
*));
105 #ifdef TARGET_BYTE_ORDER_SELECTABLE
107 static void set_endian
PARAMS ((char *, int));
109 static void set_endian_big
PARAMS ((char *, int));
111 static void set_endian_little
PARAMS ((char *, int));
113 static void set_endian_auto
PARAMS ((char *, int));
115 static void show_endian
PARAMS ((char *, int));
119 static void show_history
PARAMS ((char *, int));
121 static void set_history
PARAMS ((char *, int));
123 static void set_history_size_command
PARAMS ((char *, int,
124 struct cmd_list_element
*));
126 static void show_commands
PARAMS ((char *, int));
128 static void echo_command
PARAMS ((char *, int));
130 static void pwd_command
PARAMS ((char *, int));
132 static void show_version
PARAMS ((char *, int));
134 static void document_command
PARAMS ((char *, int));
136 static void define_command
PARAMS ((char *, int));
138 static void validate_comname
PARAMS ((char *));
140 static void help_command
PARAMS ((char *, int));
142 static void show_command
PARAMS ((char *, int));
144 static void info_command
PARAMS ((char *, int));
146 static void complete_command
PARAMS ((char *, int));
148 static void do_nothing
PARAMS ((int));
150 static int quit_cover
PARAMS ((char *));
152 static void disconnect
PARAMS ((int));
154 static void source_cleanup
PARAMS ((FILE *));
156 /* If this definition isn't overridden by the header files, assume
157 that isatty and fileno exist on this system. */
159 #define ISATTY(FP) (isatty (fileno (FP)))
162 /* Initialization file name for gdb. This is overridden in some configs. */
164 #ifndef GDBINIT_FILENAME
165 #define GDBINIT_FILENAME ".gdbinit"
167 char gdbinit
[] = GDBINIT_FILENAME
;
169 int inhibit_gdbinit
= 0;
171 /* If nonzero, and GDB has been configured to be able to use windows,
172 attempt to open them upon startup. */
176 /* Version number of GDB, as a string. */
178 extern char *version
;
180 /* Canonical host name as a string. */
182 extern char *host_name
;
184 /* Canonical target name as a string. */
186 extern char *target_name
;
188 extern char lang_frame_mismatch_warn
[]; /* language.c */
190 /* Flag for whether we want all the "from_tty" gubbish printed. */
192 int caution
= 1; /* Default is yes, sigh. */
194 /* Define all cmd_list_elements. */
196 /* Chain containing all defined commands. */
198 struct cmd_list_element
*cmdlist
;
200 /* Chain containing all defined info subcommands. */
202 struct cmd_list_element
*infolist
;
204 /* Chain containing all defined enable subcommands. */
206 struct cmd_list_element
*enablelist
;
208 /* Chain containing all defined disable subcommands. */
210 struct cmd_list_element
*disablelist
;
212 /* Chain containing all defined delete subcommands. */
214 struct cmd_list_element
*deletelist
;
216 /* Chain containing all defined "enable breakpoint" subcommands. */
218 struct cmd_list_element
*enablebreaklist
;
220 /* Chain containing all defined set subcommands */
222 struct cmd_list_element
*setlist
;
224 /* Chain containing all defined unset subcommands */
226 struct cmd_list_element
*unsetlist
;
228 /* Chain containing all defined show subcommands. */
230 struct cmd_list_element
*showlist
;
232 #ifdef TARGET_BYTE_ORDER_SELECTABLE
233 /* Chain containing the \"set endian\" commands. */
235 struct cmd_list_element
*endianlist
;
238 /* Chain containing all defined \"set history\". */
240 struct cmd_list_element
*sethistlist
;
242 /* Chain containing all defined \"show history\". */
244 struct cmd_list_element
*showhistlist
;
246 /* Chain containing all defined \"unset history\". */
248 struct cmd_list_element
*unsethistlist
;
250 /* Chain containing all defined maintenance subcommands. */
253 struct cmd_list_element
*maintenancelist
;
256 /* Chain containing all defined "maintenance info" subcommands. */
259 struct cmd_list_element
*maintenanceinfolist
;
262 /* Chain containing all defined "maintenance print" subcommands. */
265 struct cmd_list_element
*maintenanceprintlist
;
268 struct cmd_list_element
*setprintlist
;
270 struct cmd_list_element
*showprintlist
;
272 struct cmd_list_element
*setchecklist
;
274 struct cmd_list_element
*showchecklist
;
276 /* stdio stream that command input is being read from. Set to stdin normally.
277 Set by source_command to the file we are sourcing. Set to NULL if we are
278 executing a user-defined command. */
282 /* Current working directory. */
284 char *current_directory
;
286 /* The directory name is actually stored here (usually). */
287 char gdb_dirbuf
[1024];
289 /* Function to call before reading a command, if nonzero.
290 The function receives two args: an input stream,
291 and a prompt string. */
293 void (*window_hook
) PARAMS ((FILE *, char *));
298 /* gdb prints this when reading a command interactively */
301 /* Buffer used for reading command lines, and the size
302 allocated for it so far. */
307 /* Nonzero if the current command is modified by "server ". This
308 affects things like recording into the command history, comamnds
309 repeating on RETURN, etc. This is so a user interface (emacs, GUI,
310 whatever) can issue its own commands and also send along commands
311 from the user, and have the user not notice that the user interface
312 is issuing commands too. */
315 /* Baud rate specified for talking to serial target systems. Default
316 is left as -1, so targets can choose their own defaults. */
317 /* FIXME: This means that "show remotebaud" and gr_files_info can print -1
318 or (unsigned int)-1. This is a Bad User Interface. */
322 /* Non-zero tells remote* modules to output debugging info. */
324 int remote_debug
= 0;
326 /* Level of control structure. */
327 static int control_level
;
329 /* Structure for arguments to user defined functions. */
330 #define MAXUSERARGS 10
333 struct user_args
*next
;
342 /* Signal to catch ^Z typed while reading a command: SIGTSTP or SIGCONT. */
346 #define STOP_SIGNAL SIGTSTP
347 static void stop_sig
PARAMS ((int));
351 /* Some System V have job control but not sigsetmask(). */
352 #if !defined (HAVE_SIGSETMASK)
354 #define HAVE_SIGSETMASK 1
356 #define HAVE_SIGSETMASK 0
360 #if 0 == (HAVE_SIGSETMASK)
361 #define sigsetmask(n)
364 /* Hooks for alternate command interfaces. */
366 /* Called after most modules have been initialized, but before taking users
369 void (*init_ui_hook
) PARAMS ((void));
371 /* Called instead of command_loop at top level. Can be invoked via
372 return_to_top_level. */
374 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 when the target says something to the host, which may
382 want to appear in a different window. */
384 void (*target_output_hook
) PARAMS ((char *));
386 /* Called from print_frame_info to list the line we stopped in. */
388 void (*print_frame_info_listing_hook
) PARAMS ((struct symtab
*s
, int line
,
389 int stopline
, int noerror
));
390 /* Replaces most of query. */
392 int (*query_hook
) PARAMS (());
394 /* Called from gdb_flush to flush output. */
396 void (*flush_hook
) PARAMS ((FILE *stream
));
398 /* Called as appropriate to notify the interface of the specified breakpoint
401 void (*create_breakpoint_hook
) PARAMS ((struct breakpoint
*bpt
));
402 void (*delete_breakpoint_hook
) PARAMS ((struct breakpoint
*bpt
));
403 void (*modify_breakpoint_hook
) PARAMS ((struct breakpoint
*bpt
));
405 /* Called during long calculations to allow GUI to repair window damage, and to
406 check for stop buttons, etc... */
408 void (*interactive_hook
) PARAMS ((void));
410 /* Called when the registers have changed, as a hint to a GUI
411 to minimize window update. */
413 void (*registers_changed_hook
) PARAMS ((void));
415 /* Called when going to wait for the target. Usually allows the GUI to run
416 while waiting for target events. */
418 int (*target_wait_hook
) PARAMS ((int pid
, struct target_waitstatus
*status
));
420 /* Used by UI as a wrapper around command execution. May do various things
421 like enabling/disabling buttons, etc... */
423 void (*call_command_hook
) PARAMS ((struct cmd_list_element
*c
, char *cmd
,
427 /* Takes control from error (). Typically used to prevent longjmps out of the
428 middle of the GUI. Usually used in conjunction with a catch routine. */
430 NORETURN
void (*error_hook
) PARAMS (()) ATTR_NORETURN
;
433 /* Where to go for return_to_top_level (RETURN_ERROR). */
434 jmp_buf error_return
;
435 /* Where to go for return_to_top_level (RETURN_QUIT). */
438 /* Return for reason REASON. This generally gets back to the command
439 loop, but can be caught via catch_errors. */
442 return_to_top_level (reason
)
443 enum return_reason reason
;
448 /* Perhaps it would be cleaner to do this via the cleanup chain (not sure
449 I can think of a reason why that is vital, though). */
450 bpstat_clear_actions(stop_bpstat
); /* Clear queued breakpoint commands */
452 disable_current_display ();
453 do_cleanups (ALL_CLEANUPS
);
455 if (annotation_level
> 1)
466 (NORETURN
void) longjmp
467 (reason
== RETURN_ERROR
? error_return
: quit_return
, 1);
470 /* Call FUNC with arg ARGS, catching any errors. If there is no
471 error, return the value returned by FUNC. If there is an error,
472 print ERRSTRING, print the specific error message, then return
475 Must not be called with immediate_quit in effect (bad things might
476 happen, say we got a signal in the middle of a memcpy to quit_return).
477 This is an OK restriction; with very few exceptions immediate_quit can
478 be replaced by judicious use of QUIT.
480 MASK specifies what to catch; it is normally set to
481 RETURN_MASK_ALL, if for no other reason than that the code which
482 calls catch_errors might not be set up to deal with a quit which
483 isn't caught. But if the code can deal with it, it generally
484 should be RETURN_MASK_ERROR, unless for some reason it is more
485 useful to abort only the portion of the operation inside the
486 catch_errors. Note that quit should return to the command line
487 fairly quickly, even if some further processing is being done. */
490 catch_errors (func
, args
, errstring
, mask
)
491 int (*func
) PARAMS ((char *));
500 struct cleanup
*saved_cleanup_chain
;
501 char *saved_error_pre_print
;
502 char *saved_quit_pre_print
;
504 saved_cleanup_chain
= save_cleanups ();
505 saved_error_pre_print
= error_pre_print
;
506 saved_quit_pre_print
= quit_pre_print
;
508 if (mask
& RETURN_MASK_ERROR
)
510 memcpy ((char *)saved_error
, (char *)error_return
, sizeof (jmp_buf));
511 error_pre_print
= errstring
;
513 if (mask
& RETURN_MASK_QUIT
)
515 memcpy (saved_quit
, quit_return
, sizeof (jmp_buf));
516 quit_pre_print
= errstring
;
519 if (setjmp (tmp_jmp
) == 0)
521 if (mask
& RETURN_MASK_ERROR
)
522 memcpy (error_return
, tmp_jmp
, sizeof (jmp_buf));
523 if (mask
& RETURN_MASK_QUIT
)
524 memcpy (quit_return
, tmp_jmp
, sizeof (jmp_buf));
525 val
= (*func
) (args
);
530 restore_cleanups (saved_cleanup_chain
);
532 if (mask
& RETURN_MASK_ERROR
)
534 memcpy (error_return
, saved_error
, sizeof (jmp_buf));
535 error_pre_print
= saved_error_pre_print
;
537 if (mask
& RETURN_MASK_QUIT
)
539 memcpy (quit_return
, saved_quit
, sizeof (jmp_buf));
540 quit_pre_print
= saved_quit_pre_print
;
545 /* Handler for SIGHUP. */
551 catch_errors (quit_cover
, NULL
,
552 "Could not kill the program being debugged", RETURN_MASK_ALL
);
553 signal (SIGHUP
, SIG_DFL
);
554 kill (getpid (), SIGHUP
);
557 /* Just a little helper function for disconnect(). */
563 caution
= 0; /* Throw caution to the wind -- we're exiting.
564 This prevents asking the user dumb questions. */
565 quit_command((char *)0, 0);
569 /* Line number we are currently in in a file which is being sourced. */
570 static int source_line_number
;
572 /* Name of the file we are sourcing. */
573 static char *source_file_name
;
575 /* Buffer containing the error_pre_print used by the source stuff.
577 static char *source_error
;
578 static int source_error_allocated
;
580 /* Something to glom on to the start of error_pre_print if source_file_name
582 static char *source_pre_error
;
584 /* Clean up on error during a "source" command (or execution of a
585 user-defined command). */
588 source_cleanup (stream
)
591 /* Restore the previous input stream. */
595 /* Read commands from STREAM. */
597 read_command_file (stream
)
600 struct cleanup
*cleanups
;
602 cleanups
= make_cleanup (source_cleanup
, instream
);
605 do_cleanups (cleanups
);
608 extern void init_proc ();
610 void (*pre_init_ui_hook
) PARAMS ((void));
615 if (pre_init_ui_hook
)
618 /* Run the init function of each source file */
620 getcwd (gdb_dirbuf
, sizeof (gdb_dirbuf
));
621 current_directory
= gdb_dirbuf
;
623 init_cmd_lists (); /* This needs to be done first */
624 initialize_targets (); /* Setup target_terminal macros for utils.c */
625 initialize_utils (); /* Make errors and warnings possible */
626 initialize_all_files ();
627 init_main (); /* But that omits this file! Do it now */
632 /* We need a default language for parsing expressions, so simple things like
633 "set width 0" won't fail if no language is explicitly set in a config file
634 or implicitly set by reading an executable during startup. */
635 set_language (language_c
);
636 expected_language
= current_language
; /* don't warn about the change. */
642 /* Allocate, initialize a new command line structure for one of the
643 control commands (if/while). */
645 static struct command_line
*
646 build_command_line (type
, args
)
647 enum command_control_type type
;
650 struct command_line
*cmd
;
652 cmd
= (struct command_line
*)xmalloc (sizeof (struct command_line
));
654 cmd
->control_type
= type
;
658 = (struct command_line
**)xmalloc (sizeof (struct command_line
*)
660 memset (cmd
->body_list
, 0, sizeof (struct command_line
*) * cmd
->body_count
);
661 cmd
->line
= savestring (args
, strlen (args
));
665 /* Build and return a new command structure for the control commands
666 such as "if" and "while". */
668 static struct command_line
*
669 get_command_line (type
, arg
)
670 enum command_control_type type
;
673 struct command_line
*cmd
;
674 struct cleanup
*old_chain
= NULL
;
676 /* Allocate and build a new command line structure. */
677 cmd
= build_command_line (type
, arg
);
679 old_chain
= make_cleanup (free_command_lines
, &cmd
);
681 /* Read in the body of this command. */
682 if (recurse_read_control_structure (cmd
) == invalid_control
)
684 warning ("error reading in control structure\n");
685 do_cleanups (old_chain
);
689 discard_cleanups (old_chain
);
693 /* Recursively print a command (including full control structures). */
695 print_command_line (cmd
, depth
)
696 struct command_line
*cmd
;
703 for (i
= 0; i
< depth
; i
++)
704 fputs_filtered (" ", gdb_stdout
);
707 /* A simple command, print it and return. */
708 if (cmd
->control_type
== simple_control
)
710 fputs_filtered (cmd
->line
, gdb_stdout
);
711 fputs_filtered ("\n", gdb_stdout
);
715 /* loop_continue to jump to the start of a while loop, print it
717 if (cmd
->control_type
== continue_control
)
719 fputs_filtered ("loop_continue\n", gdb_stdout
);
723 /* loop_break to break out of a while loop, print it and return. */
724 if (cmd
->control_type
== break_control
)
726 fputs_filtered ("loop_break\n", gdb_stdout
);
730 /* A while command. Recursively print its subcommands before returning. */
731 if (cmd
->control_type
== while_control
)
733 struct command_line
*list
;
734 fputs_filtered ("while ", gdb_stdout
);
735 fputs_filtered (cmd
->line
, gdb_stdout
);
736 fputs_filtered ("\n", gdb_stdout
);
737 list
= *cmd
->body_list
;
740 print_command_line (list
, depth
+ 1);
745 /* An if command. Recursively print both arms before returning. */
746 if (cmd
->control_type
== if_control
)
748 fputs_filtered ("if ", gdb_stdout
);
749 fputs_filtered (cmd
->line
, gdb_stdout
);
750 fputs_filtered ("\n", gdb_stdout
);
752 print_command_line (cmd
->body_list
[0], depth
+ 1);
754 /* Show the false arm if it exists. */
755 if (cmd
->body_count
== 2)
759 for (i
= 0; i
< depth
; i
++)
760 fputs_filtered (" ", gdb_stdout
);
762 fputs_filtered ("else\n", gdb_stdout
);
763 print_command_line (cmd
->body_list
[1], depth
+ 1);
767 for (i
= 0; i
< depth
; i
++)
768 fputs_filtered (" ", gdb_stdout
);
770 fputs_filtered ("end\n", gdb_stdout
);
774 /* Execute the command in CMD. */
776 enum command_control_type
777 execute_control_command (cmd
)
778 struct command_line
*cmd
;
780 struct expression
*expr
;
781 struct command_line
*current
;
782 struct cleanup
*old_chain
= 0;
785 enum command_control_type ret
;
788 switch (cmd
->control_type
)
791 /* A simple command, execute it and return. */
792 new_line
= insert_args (cmd
->line
);
794 return invalid_control
;
795 old_chain
= make_cleanup (free_current_contents
, &new_line
);
796 execute_command (new_line
, 0);
797 ret
= cmd
->control_type
;
800 case continue_control
:
802 /* Return for "continue", and "break" so we can either
803 continue the loop at the top, or break out. */
804 ret
= cmd
->control_type
;
809 /* Parse the loop control expression for the while statement. */
810 new_line
= insert_args (cmd
->line
);
812 return invalid_control
;
813 old_chain
= make_cleanup (free_current_contents
, &new_line
);
814 expr
= parse_expression (new_line
);
815 make_cleanup (free_current_contents
, &expr
);
817 ret
= simple_control
;
820 /* Keep iterating so long as the expression is true. */
823 /* Evaluate the expression. */
824 val
= evaluate_expression (expr
);
826 /* If the value is false, then break out of the loop. */
827 if (!value_true (val
))
830 /* Execute the body of the while statement. */
831 current
= *cmd
->body_list
;
834 ret
= execute_control_command (current
);
836 /* If we got an error, or a "break" command, then stop
838 if (ret
== invalid_control
|| ret
== break_control
)
844 /* If we got a "continue" command, then restart the loop
846 if (ret
== continue_control
)
849 /* Get the next statement. */
850 current
= current
->next
;
854 /* Reset RET so that we don't recurse the break all the way down. */
855 if (ret
== break_control
)
856 ret
= simple_control
;
863 new_line
= insert_args (cmd
->line
);
865 return invalid_control
;
866 old_chain
= make_cleanup (free_current_contents
, &new_line
);
867 /* Parse the conditional for the if statement. */
868 expr
= parse_expression (new_line
);
869 make_cleanup (free_current_contents
, &expr
);
872 ret
= simple_control
;
874 /* Evaluate the conditional. */
875 val
= evaluate_expression (expr
);
877 /* Choose which arm to take commands from based on the value of the
878 conditional expression. */
879 if (value_true (val
))
880 current
= *cmd
->body_list
;
881 else if (cmd
->body_count
== 2)
882 current
= *(cmd
->body_list
+ 1);
884 /* Execute commands in the given arm. */
887 ret
= execute_control_command (current
);
889 /* If we got an error, get out. */
890 if (ret
!= simple_control
)
893 /* Get the next statement in the body. */
894 current
= current
->next
;
901 warning ("Invalid control type in command structure.");
902 return invalid_control
;
906 do_cleanups (old_chain
);
911 /* "while" command support. Executes a body of statements while the
912 loop condition is nonzero. */
915 while_command (arg
, from_tty
)
919 struct command_line
*command
= NULL
;
922 command
= get_command_line (while_control
, arg
);
927 execute_control_command (command
);
928 free_command_lines (&command
);
931 /* "if" command support. Execute either the true or false arm depending
932 on the value of the if conditional. */
935 if_command (arg
, from_tty
)
939 struct command_line
*command
= NULL
;
942 command
= get_command_line (if_control
, arg
);
947 execute_control_command (command
);
948 free_command_lines (&command
);
955 struct user_args
*oargs
= user_args
;
957 fatal ("Internal error, arg_cleanup called with no user args.\n");
959 user_args
= user_args
->next
;
963 /* Bind the incomming arguments for a user defined command to
964 $arg0, $arg1 ... $argMAXUSERARGS. */
966 static struct cleanup
*
970 struct user_args
*args
;
971 struct cleanup
*old_chain
;
972 unsigned int arg_count
= 0;
974 args
= (struct user_args
*)xmalloc (sizeof (struct user_args
));
975 memset (args
, 0, sizeof (struct user_args
));
977 args
->next
= user_args
;
980 old_chain
= make_cleanup (arg_cleanup
, 0);
989 if (arg_count
>= MAXUSERARGS
)
991 error ("user defined function may only have %d arguments.\n",
996 /* Strip whitespace. */
997 while (*p
== ' ' || *p
== '\t')
1000 /* P now points to an argument. */
1002 user_args
->a
[arg_count
].arg
= p
;
1004 /* Get to the end of this argument. */
1005 while (*p
&& *p
!= ' ' && *p
!= '\t')
1008 user_args
->a
[arg_count
].len
= p
- start_arg
;
1015 /* Given character string P, return a point to the first argument ($arg),
1016 or NULL if P contains no arguments. */
1022 while ((p
= strchr (p
, '$')))
1024 if (strncmp (p
, "$arg", 4) == 0 && isdigit (p
[4]))
1031 /* Insert the user defined arguments stored in user_arg into the $arg
1032 arguments found in line, with the updated copy being placed into nline. */
1038 char *p
, *save_line
, *new_line
;
1041 /* First we need to know how much memory to allocate for the new line. */
1044 while ((p
= locate_arg (line
)))
1049 if (i
>= user_args
->count
)
1051 error ("Missing argument %d in user function.\n", i
);
1054 len
+= user_args
->a
[i
].len
;
1058 /* Don't forget the tail. */
1059 len
+= strlen (line
);
1061 /* Allocate space for the new line and fill it in. */
1062 new_line
= (char *)xmalloc (len
+ 1);
1063 if (new_line
== NULL
)
1066 /* Restore pointer to beginning of old line. */
1069 /* Save pointer to beginning of new line. */
1070 save_line
= new_line
;
1072 while ((p
= locate_arg (line
)))
1076 memcpy (new_line
, line
, p
- line
);
1077 new_line
+= p
- line
;
1080 len
= user_args
->a
[i
].len
;
1083 memcpy (new_line
, user_args
->a
[i
].arg
, len
);
1088 /* Don't forget the tail. */
1089 strcpy (new_line
, line
);
1091 /* Return a pointer to the beginning of the new line. */
1096 execute_user_command (c
, args
)
1097 struct cmd_list_element
*c
;
1100 register struct command_line
*cmdlines
;
1101 struct cleanup
*old_chain
;
1102 enum command_control_type ret
;
1104 old_chain
= setup_user_args (args
);
1106 cmdlines
= c
->user_commands
;
1111 /* Set the instream to 0, indicating execution of a
1112 user-defined function. */
1113 old_chain
= make_cleanup (source_cleanup
, instream
);
1114 instream
= (FILE *) 0;
1117 ret
= execute_control_command (cmdlines
);
1118 if (ret
!= simple_control
&& ret
!= break_control
)
1120 warning ("Error in control structure.\n");
1123 cmdlines
= cmdlines
->next
;
1125 do_cleanups (old_chain
);
1128 /* Execute the line P as a command.
1129 Pass FROM_TTY as second argument to the defining function. */
1132 execute_command (p
, from_tty
)
1136 register struct cmd_list_element
*c
;
1137 register enum language flang
;
1138 static int warned
= 0;
1142 /* This can happen when command_line_input hits end of file. */
1146 while (*p
== ' ' || *p
== '\t') p
++;
1151 c
= lookup_cmd (&p
, cmdlist
, "", 0, 1);
1152 /* Pass null arg rather than an empty one. */
1155 /* Clear off trailing whitespace, except for set and complete command. */
1156 if (arg
&& c
->type
!= set_cmd
&& c
->function
.cfunc
!= complete_command
)
1158 p
= arg
+ strlen (arg
) - 1;
1159 while (p
>= arg
&& (*p
== ' ' || *p
== '\t'))
1164 /* If this command has been hooked, run the hook first. */
1166 execute_user_command (c
->hook
, (char *)0);
1168 if (c
->class == class_user
)
1169 execute_user_command (c
, arg
);
1170 else if (c
->type
== set_cmd
|| c
->type
== show_cmd
)
1171 do_setshow_command (arg
, from_tty
& caution
, c
);
1172 else if (c
->function
.cfunc
== NO_FUNCTION
)
1173 error ("That is not a command, just a help topic.");
1174 else if (call_command_hook
)
1175 call_command_hook (c
, arg
, from_tty
& caution
);
1177 (*c
->function
.cfunc
) (arg
, from_tty
& caution
);
1180 /* Tell the user if the language has changed (except first time). */
1181 if (current_language
!= expected_language
)
1183 if (language_mode
== language_mode_auto
) {
1184 language_info (1); /* Print what changed. */
1189 /* Warn the user if the working language does not match the
1190 language of the current frame. Only warn the user if we are
1191 actually running the program, i.e. there is a stack. */
1192 /* FIXME: This should be cacheing the frame and only running when
1193 the frame changes. */
1195 if (target_has_stack
)
1197 flang
= get_frame_language ();
1199 && flang
!= language_unknown
1200 && flang
!= current_language
->la_language
)
1202 printf_filtered ("%s\n", lang_frame_mismatch_warn
);
1210 command_loop_marker (foo
)
1215 /* Read commands from `instream' and execute them
1216 until end of file or error reading instream. */
1221 struct cleanup
*old_chain
;
1223 int stdin_is_tty
= ISATTY (stdin
);
1224 long time_at_cmd_start
;
1225 long space_at_cmd_start
;
1226 extern int display_time
;
1227 extern int display_space
;
1229 while (!feof (instream
))
1231 if (window_hook
&& instream
== stdin
)
1232 (*window_hook
) (instream
, prompt
);
1235 if (instream
== stdin
&& stdin_is_tty
)
1236 reinitialize_more_filter ();
1237 old_chain
= make_cleanup (command_loop_marker
, 0);
1238 command
= command_line_input (instream
== stdin
? prompt
: (char *) NULL
,
1239 instream
== stdin
, "prompt");
1243 time_at_cmd_start
= get_run_time ();
1247 extern char **environ
;
1248 char *lim
= (char *) sbrk (0);
1250 space_at_cmd_start
= (long) (lim
- (char *) &environ
);
1253 execute_command (command
, instream
== stdin
);
1254 /* Do any commands attached to breakpoint we stopped at. */
1255 bpstat_do_actions (&stop_bpstat
);
1256 do_cleanups (old_chain
);
1260 long cmd_time
= get_run_time () - time_at_cmd_start
;
1262 printf_unfiltered ("Command execution time: %ld.%06ld\n",
1263 cmd_time
/ 1000000, cmd_time
% 1000000);
1268 extern char **environ
;
1269 char *lim
= (char *) sbrk (0);
1270 long space_now
= lim
- (char *) &environ
;
1271 long space_diff
= space_now
- space_at_cmd_start
;
1273 printf_unfiltered ("Space used: %ld (%c%ld for this command)\n",
1275 (space_diff
>= 0 ? '+' : '-'),
1281 /* Commands call this if they do not want to be repeated by null lines. */
1289 /* If we aren't reading from standard input, we are saving the last
1290 thing read from stdin in line and don't want to delete it. Null lines
1291 won't repeat here in any case. */
1292 if (instream
== stdin
)
1296 /* Read a line from the stream "instream" without command line editing.
1298 It prints PRROMPT once at the start.
1299 Action is compatible with "readline", e.g. space for the result is
1300 malloc'd and should be freed by the caller.
1302 A NULL return means end of file. */
1304 gdb_readline (prrompt
)
1309 int input_index
= 0;
1310 int result_size
= 80;
1314 /* Don't use a _filtered function here. It causes the assumed
1315 character position to be off, since the newline we read from
1316 the user is not accounted for. */
1317 fputs_unfiltered (prrompt
, gdb_stdout
);
1319 /* Move to a new line so the entered line doesn't have a prompt
1320 on the front of it. */
1321 fputs_unfiltered ("\n", gdb_stdout
);
1323 gdb_flush (gdb_stdout
);
1326 result
= (char *) xmalloc (result_size
);
1330 /* Read from stdin if we are executing a user defined command.
1331 This is the right thing for prompt_for_continue, at least. */
1332 c
= fgetc (instream
? instream
: stdin
);
1336 if (input_index
> 0)
1337 /* The last line does not end with a newline. Return it, and
1338 if we are called again fgetc will still return EOF and
1339 we'll return NULL then. */
1348 result
[input_index
++] = c
;
1349 while (input_index
>= result_size
)
1352 result
= (char *) xrealloc (result
, result_size
);
1356 result
[input_index
++] = '\0';
1360 /* Variables which control command line editing and history
1361 substitution. These variables are given default values at the end
1363 static int command_editing_p
;
1364 static int history_expansion_p
;
1365 static int write_history_p
;
1366 static int history_size
;
1367 static char *history_filename
;
1369 /* readline uses the word breaks for two things:
1370 (1) In figuring out where to point the TEXT parameter to the
1371 rl_completion_entry_function. Since we don't use TEXT for much,
1372 it doesn't matter a lot what the word breaks are for this purpose, but
1373 it does affect how much stuff M-? lists.
1374 (2) If one of the matches contains a word break character, readline
1375 will quote it. That's why we switch between
1376 gdb_completer_word_break_characters and
1377 gdb_completer_command_word_break_characters. I'm not sure when
1378 we need this behavior (perhaps for funky characters in C++ symbols?). */
1380 /* Variables which are necessary for fancy command line editing. */
1381 char *gdb_completer_word_break_characters
=
1382 " \t\n!@#$%^&*()+=|~`}{[]\"';:?/>.<,-";
1384 /* When completing on command names, we remove '-' from the list of
1385 word break characters, since we use it in command names. If the
1386 readline library sees one in any of the current completion strings,
1387 it thinks that the string needs to be quoted and automatically supplies
1389 char *gdb_completer_command_word_break_characters
=
1390 " \t\n!@#$%^&*()+=|~`}{[]\"';:?/>.<,";
1392 /* Characters that can be used to quote completion strings. Note that we
1393 can't include '"' because the gdb C parser treats such quoted sequences
1395 char *gdb_completer_quote_characters
=
1398 /* Functions that are used as part of the fancy command line editing. */
1400 /* This can be used for functions which don't want to complete on symbols
1401 but don't want to complete on anything else either. */
1404 noop_completer (text
, prefix
)
1411 /* Complete on filenames. */
1413 filename_completer (text
, word
)
1417 /* From readline. */
1418 extern char *filename_completion_function ();
1419 int subsequent_name
;
1421 int return_val_used
;
1422 int return_val_alloced
;
1424 return_val_used
= 0;
1425 /* Small for testing. */
1426 return_val_alloced
= 1;
1427 return_val
= (char **) xmalloc (return_val_alloced
* sizeof (char *));
1429 subsequent_name
= 0;
1433 p
= filename_completion_function (text
, subsequent_name
);
1434 if (return_val_used
>= return_val_alloced
)
1436 return_val_alloced
*= 2;
1438 (char **) xrealloc (return_val
,
1439 return_val_alloced
* sizeof (char *));
1443 return_val
[return_val_used
++] = p
;
1446 /* Like emacs, don't complete on old versions. Especially useful
1447 in the "source" command. */
1448 if (p
[strlen (p
) - 1] == '~')
1454 /* Return exactly p. */
1455 return_val
[return_val_used
++] = p
;
1456 else if (word
> text
)
1458 /* Return some portion of p. */
1459 q
= xmalloc (strlen (p
) + 5);
1460 strcpy (q
, p
+ (word
- text
));
1461 return_val
[return_val_used
++] = q
;
1466 /* Return some of TEXT plus p. */
1467 q
= xmalloc (strlen (p
) + (text
- word
) + 5);
1468 strncpy (q
, word
, text
- word
);
1469 q
[text
- word
] = '\0';
1471 return_val
[return_val_used
++] = q
;
1475 subsequent_name
= 1;
1478 /* There is no way to do this just long enough to affect quote inserting
1479 without also affecting the next completion. This should be fixed in
1481 /* Insure that readline does the right thing
1482 with respect to inserting quotes. */
1483 rl_completer_word_break_characters
= "";
1488 /* Here are some useful test cases for completion. FIXME: These should
1489 be put in the test suite. They should be tested with both M-? and TAB.
1491 "show output-" "radix"
1492 "show output" "-radix"
1493 "p" ambiguous (commands starting with p--path, print, printf, etc.)
1494 "p " ambiguous (all symbols)
1495 "info t foo" no completions
1496 "info t " no completions
1497 "info t" ambiguous ("info target", "info terminal", etc.)
1498 "info ajksdlfk" no completions
1499 "info ajksdlfk " no completions
1501 "info " ambiguous (all info commands)
1502 "p \"a" no completions (string constant)
1503 "p 'a" ambiguous (all symbols starting with a)
1504 "p b-a" ambiguous (all symbols starting with a)
1505 "p b-" ambiguous (all symbols)
1506 "file Make" "file" (word break hard to screw up here)
1507 "file ../gdb.stabs/we" "ird" (needs to not break word at slash)
1510 /* Generate completions one by one for the completer. Each time we are
1511 called return another potential completion to the caller.
1512 line_completion just completes on commands or passes the buck to the
1513 command's completer function, the stuff specific to symbol completion
1514 is in make_symbol_completion_list.
1516 TEXT is the caller's idea of the "word" we are looking at.
1518 MATCHES is the number of matches that have currently been collected from
1519 calling this completion function. When zero, then we need to initialize,
1520 otherwise the initialization has already taken place and we can just
1521 return the next potential completion string.
1523 LINE_BUFFER is available to be looked at; it contains the entire text
1524 of the line. POINT is the offset in that line of the cursor. You
1525 should pretend that the line ends at POINT.
1527 Returns NULL if there are no more completions, else a pointer to a string
1528 which is a possible completion, it is the caller's responsibility to
1532 line_completion_function (text
, matches
, line_buffer
, point
)
1538 static char **list
= (char **)NULL
; /* Cache of completions */
1539 static int index
; /* Next cached completion */
1540 char *output
= NULL
;
1541 char *tmp_command
, *p
;
1542 /* Pointer within tmp_command which corresponds to text. */
1544 struct cmd_list_element
*c
, *result_list
;
1548 /* The caller is beginning to accumulate a new set of completions, so
1549 we need to find all of them now, and cache them for returning one at
1550 a time on future calls. */
1554 /* Free the storage used by LIST, but not by the strings inside.
1555 This is because rl_complete_internal () frees the strings. */
1561 /* Choose the default set of word break characters to break completions.
1562 If we later find out that we are doing completions on command strings
1563 (as opposed to strings supplied by the individual command completer
1564 functions, which can be any string) then we will switch to the
1565 special word break set for command strings, which leaves out the
1566 '-' character used in some commands. */
1568 rl_completer_word_break_characters
=
1569 gdb_completer_word_break_characters
;
1571 /* Decide whether to complete on a list of gdb commands or on symbols. */
1572 tmp_command
= (char *) alloca (point
+ 1);
1575 strncpy (tmp_command
, line_buffer
, point
);
1576 tmp_command
[point
] = '\0';
1577 /* Since text always contains some number of characters leading up
1578 to point, we can find the equivalent position in tmp_command
1579 by subtracting that many characters from the end of tmp_command. */
1580 word
= tmp_command
+ point
- strlen (text
);
1584 /* An empty line we want to consider ambiguous; that is, it
1585 could be any command. */
1586 c
= (struct cmd_list_element
*) -1;
1591 c
= lookup_cmd_1 (&p
, cmdlist
, &result_list
, 1);
1594 /* Move p up to the next interesting thing. */
1595 while (*p
== ' ' || *p
== '\t')
1602 /* It is an unrecognized command. So there are no
1603 possible completions. */
1606 else if (c
== (struct cmd_list_element
*) -1)
1610 /* lookup_cmd_1 advances p up to the first ambiguous thing, but
1611 doesn't advance over that thing itself. Do so now. */
1613 while (*q
&& (isalnum (*q
) || *q
== '-' || *q
== '_'))
1615 if (q
!= tmp_command
+ point
)
1617 /* There is something beyond the ambiguous
1618 command, so there are no possible completions. For
1619 example, "info t " or "info t foo" does not complete
1620 to anything, because "info t" can be "info target" or
1626 /* We're trying to complete on the command which was ambiguous.
1627 This we can deal with. */
1630 list
= complete_on_cmdlist (*result_list
->prefixlist
, p
,
1635 list
= complete_on_cmdlist (cmdlist
, p
, word
);
1637 /* Insure that readline does the right thing with respect to
1638 inserting quotes. */
1639 rl_completer_word_break_characters
=
1640 gdb_completer_command_word_break_characters
;
1645 /* We've recognized a full command. */
1647 if (p
== tmp_command
+ point
)
1649 /* There is no non-whitespace in the line beyond the command. */
1651 if (p
[-1] == ' ' || p
[-1] == '\t')
1653 /* The command is followed by whitespace; we need to complete
1654 on whatever comes after command. */
1657 /* It is a prefix command; what comes after it is
1658 a subcommand (e.g. "info "). */
1659 list
= complete_on_cmdlist (*c
->prefixlist
, p
, word
);
1661 /* Insure that readline does the right thing
1662 with respect to inserting quotes. */
1663 rl_completer_word_break_characters
=
1664 gdb_completer_command_word_break_characters
;
1668 list
= complete_on_enum (c
->enums
, p
, word
);
1669 rl_completer_word_break_characters
=
1670 gdb_completer_command_word_break_characters
;
1674 /* It is a normal command; what comes after it is
1675 completed by the command's completer function. */
1676 list
= (*c
->completer
) (p
, word
);
1681 /* The command is not followed by whitespace; we need to
1682 complete on the command itself. e.g. "p" which is a
1683 command itself but also can complete to "print", "ptype"
1687 /* Find the command we are completing on. */
1689 while (q
> tmp_command
)
1691 if (isalnum (q
[-1]) || q
[-1] == '-' || q
[-1] == '_')
1697 list
= complete_on_cmdlist (result_list
, q
, word
);
1699 /* Insure that readline does the right thing
1700 with respect to inserting quotes. */
1701 rl_completer_word_break_characters
=
1702 gdb_completer_command_word_break_characters
;
1707 /* There is non-whitespace beyond the command. */
1709 if (c
->prefixlist
&& !c
->allow_unknown
)
1711 /* It is an unrecognized subcommand of a prefix command,
1712 e.g. "info adsfkdj". */
1717 list
= complete_on_enum (c
->enums
, p
, word
);
1721 /* It is a normal command. */
1722 list
= (*c
->completer
) (p
, word
);
1728 /* If we found a list of potential completions during initialization then
1729 dole them out one at a time. The vector of completions is NULL
1730 terminated, so after returning the last one, return NULL (and continue
1731 to do so) each time we are called after that, until a new list is
1736 output
= list
[index
];
1744 /* Can't do this because readline hasn't yet checked the word breaks
1745 for figuring out whether to insert a quote. */
1747 /* Make sure the word break characters are set back to normal for the
1748 next time that readline tries to complete something. */
1749 rl_completer_word_break_characters
=
1750 gdb_completer_word_break_characters
;
1756 /* Line completion interface function for readline. */
1759 readline_line_completion_function (text
, matches
)
1763 return line_completion_function (text
, matches
, rl_line_buffer
, rl_point
);
1766 /* Skip over a possibly quoted word (as defined by the quote characters
1767 and word break characters the completer uses). Returns pointer to the
1768 location after the "word". */
1774 char quote_char
= '\0';
1777 for (scan
= str
; *scan
!= '\0'; scan
++)
1779 if (quote_char
!= '\0')
1781 /* Ignore everything until the matching close quote char */
1782 if (*scan
== quote_char
)
1784 /* Found matching close quote. */
1789 else if (strchr (gdb_completer_quote_characters
, *scan
))
1791 /* Found start of a quoted string. */
1794 else if (strchr (gdb_completer_word_break_characters
, *scan
))
1808 #if STOP_SIGNAL == SIGTSTP
1809 signal (SIGTSTP
, SIG_DFL
);
1811 kill (getpid (), SIGTSTP
);
1812 signal (SIGTSTP
, stop_sig
);
1814 signal (STOP_SIGNAL
, stop_sig
);
1816 printf_unfiltered ("%s", prompt
);
1817 gdb_flush (gdb_stdout
);
1819 /* Forget about any previous command -- null line now will do nothing. */
1822 #endif /* STOP_SIGNAL */
1824 /* Initialize signal handlers. */
1834 signal (SIGINT
, request_quit
);
1836 /* If we initialize SIGQUIT to SIG_IGN, then the SIG_IGN will get
1837 passed to the inferior, which we don't want. It would be
1838 possible to do a "signal (SIGQUIT, SIG_DFL)" after we fork, but
1839 on BSD4.3 systems using vfork, that can affect the
1840 GDB process as well as the inferior (the signal handling tables
1841 might be in memory, shared between the two). Since we establish
1842 a handler for SIGQUIT, when we call exec it will set the signal
1843 to SIG_DFL for us. */
1844 signal (SIGQUIT
, do_nothing
);
1845 if (signal (SIGHUP
, do_nothing
) != SIG_IGN
)
1846 signal (SIGHUP
, disconnect
);
1847 signal (SIGFPE
, float_handler
);
1849 #if defined(SIGWINCH) && defined(SIGWINCH_HANDLER)
1850 signal (SIGWINCH
, SIGWINCH_HANDLER
);
1854 /* Read one line from the command input stream `instream'
1855 into the local static buffer `linebuffer' (whose current length
1857 The buffer is made bigger as necessary.
1858 Returns the address of the start of the line.
1860 NULL is returned for end of file.
1862 *If* the instream == stdin & stdin is a terminal, the line read
1863 is copied into the file line saver (global var char *line,
1864 length linesize) so that it can be duplicated.
1866 This routine either uses fancy command line editing or
1867 simple input as the user has requested. */
1870 command_line_input (prrompt
, repeat
, annotation_suffix
)
1873 char *annotation_suffix
;
1875 static char *linebuffer
= 0;
1876 static unsigned linelength
= 0;
1880 char *local_prompt
= prrompt
;
1885 /* The annotation suffix must be non-NULL. */
1886 if (annotation_suffix
== NULL
)
1887 annotation_suffix
= "";
1889 if (annotation_level
> 1 && instream
== stdin
)
1891 local_prompt
= alloca ((prrompt
== NULL
? 0 : strlen (prrompt
))
1892 + strlen (annotation_suffix
) + 40);
1893 if (prrompt
== NULL
)
1894 local_prompt
[0] = '\0';
1896 strcpy (local_prompt
, prrompt
);
1897 strcat (local_prompt
, "\n\032\032");
1898 strcat (local_prompt
, annotation_suffix
);
1899 strcat (local_prompt
, "\n");
1902 if (linebuffer
== 0)
1905 linebuffer
= (char *) xmalloc (linelength
);
1910 /* Control-C quits instantly if typed while in this loop
1911 since it should not wait until the user types a newline. */
1915 signal (STOP_SIGNAL
, stop_sig
);
1920 /* Make sure that all output has been output. Some machines may let
1921 you get away with leaving out some of the gdb_flush, but not all. */
1923 gdb_flush (gdb_stdout
);
1924 gdb_flush (gdb_stderr
);
1926 if (source_file_name
!= NULL
)
1928 ++source_line_number
;
1929 sprintf (source_error
,
1930 "%s%s:%d: Error in sourced command file:\n",
1933 source_line_number
);
1934 error_pre_print
= source_error
;
1937 if (annotation_level
> 1 && instream
== stdin
)
1939 printf_unfiltered ("\n\032\032pre-");
1940 printf_unfiltered (annotation_suffix
);
1941 printf_unfiltered ("\n");
1944 /* Don't use fancy stuff if not talking to stdin. */
1945 if (command_editing_p
&& instream
== stdin
1946 && ISATTY (instream
))
1947 rl
= readline (local_prompt
);
1949 rl
= gdb_readline (local_prompt
);
1951 if (annotation_level
> 1 && instream
== stdin
)
1953 printf_unfiltered ("\n\032\032post-");
1954 printf_unfiltered (annotation_suffix
);
1955 printf_unfiltered ("\n");
1958 if (!rl
|| rl
== (char *) EOF
)
1963 if (strlen(rl
) + 1 + (p
- linebuffer
) > linelength
)
1965 linelength
= strlen(rl
) + 1 + (p
- linebuffer
);
1966 nline
= (char *) xrealloc (linebuffer
, linelength
);
1967 p
+= nline
- linebuffer
;
1971 /* Copy line. Don't copy null at end. (Leaves line alone
1972 if this was just a newline) */
1976 free (rl
); /* Allocated in readline. */
1978 if (p
== linebuffer
|| *(p
- 1) != '\\')
1981 p
--; /* Put on top of '\'. */
1982 local_prompt
= (char *) 0;
1987 signal (STOP_SIGNAL
, SIG_DFL
);
1994 #define SERVER_COMMAND_LENGTH 7
1996 (p
- linebuffer
> SERVER_COMMAND_LENGTH
)
1997 && STREQN (linebuffer
, "server ", SERVER_COMMAND_LENGTH
);
2000 /* Note that we don't set `line'. Between this and the check in
2001 dont_repeat, this insures that repeating will still do the
2004 return linebuffer
+ SERVER_COMMAND_LENGTH
;
2007 /* Do history expansion if that is wished. */
2008 if (history_expansion_p
&& instream
== stdin
2009 && ISATTY (instream
))
2011 char *history_value
;
2014 *p
= '\0'; /* Insert null now. */
2015 expanded
= history_expand (linebuffer
, &history_value
);
2018 /* Print the changes. */
2019 printf_unfiltered ("%s\n", history_value
);
2021 /* If there was an error, call this function again. */
2024 free (history_value
);
2025 return command_line_input (prrompt
, repeat
, annotation_suffix
);
2027 if (strlen (history_value
) > linelength
)
2029 linelength
= strlen (history_value
) + 1;
2030 linebuffer
= (char *) xrealloc (linebuffer
, linelength
);
2032 strcpy (linebuffer
, history_value
);
2033 p
= linebuffer
+ strlen(linebuffer
);
2034 free (history_value
);
2038 /* If we just got an empty line, and that is supposed
2039 to repeat the previous command, return the value in the
2043 if (p
== linebuffer
)
2046 while (*p1
== ' ' || *p1
== '\t')
2054 /* Add line to history if appropriate. */
2055 if (instream
== stdin
2056 && ISATTY (stdin
) && *linebuffer
)
2057 add_history (linebuffer
);
2059 /* Note: lines consisting solely of comments are added to the command
2060 history. This is useful when you type a command, and then
2061 realize you don't want to execute it quite yet. You can comment
2062 out the command and then later fetch it from the value history
2063 and remove the '#'. The kill ring is probably better, but some
2064 people are in the habit of commenting things out. */
2066 while ((c
= *p1
++) != '\0')
2069 while ((c
= *p1
++) != '"')
2071 /* Make sure an escaped '"' doesn't make us think the string
2079 while ((c
= *p1
++) != '\'')
2081 /* Make sure an escaped '\'' doesn't make us think the string
2090 /* Found a comment. */
2096 /* Save into global buffer if appropriate. */
2099 if (linelength
> linesize
)
2101 line
= xrealloc (line
, linelength
);
2102 linesize
= linelength
;
2104 strcpy (line
, linebuffer
);
2112 /* Expand the body_list of COMMAND so that it can hold NEW_LENGTH
2113 code bodies. This is typically used when we encounter an "else"
2114 clause for an "if" command. */
2117 realloc_body_list (command
, new_length
)
2118 struct command_line
*command
;
2122 struct command_line
**body_list
;
2124 n
= command
->body_count
;
2126 /* Nothing to do? */
2127 if (new_length
<= n
)
2130 body_list
= (struct command_line
**)
2131 xmalloc (sizeof (struct command_line
*) * new_length
);
2133 memcpy (body_list
, command
->body_list
, sizeof (struct command_line
*) * n
);
2135 free (command
->body_list
);
2136 command
->body_list
= body_list
;
2137 command
->body_count
= new_length
;
2140 /* Read one line from the input stream. If the command is an "else" or
2141 "end", return such an indication to the caller. */
2143 static enum misc_command_type
2144 read_next_line (command
)
2145 struct command_line
**command
;
2147 char *p
, *p1
, *prompt_ptr
, control_prompt
[256];
2150 if (control_level
>= 254)
2151 error ("Control nesting too deep!\n");
2153 /* Set a prompt based on the nesting of the control commands. */
2154 if (instream
== stdin
)
2156 for (i
= 0; i
< control_level
; i
++)
2157 control_prompt
[i
] = ' ';
2158 control_prompt
[i
] = '>';
2159 control_prompt
[i
+1] = '\0';
2160 prompt_ptr
= (char *)&control_prompt
[0];
2165 p
= command_line_input (prompt_ptr
, instream
== stdin
, "commands");
2167 /* Not sure what to do here. */
2171 /* Strip leading and trailing whitespace. */
2172 while (*p
== ' ' || *p
== '\t')
2175 p1
= p
+ strlen (p
);
2176 while (p1
!= p
&& (p1
[-1] == ' ' || p1
[-1] == '\t'))
2179 /* Blanks and comments don't really do anything, but we need to
2180 distinguish them from else, end and other commands which can be
2182 if (p1
== p
|| p
[0] == '#')
2185 /* Is this the end of a simple, while, or if control structure? */
2186 if (p1
- p
== 3 && !strncmp (p
, "end", 3))
2189 /* Is the else clause of an if control structure? */
2190 if (p1
- p
== 4 && !strncmp (p
, "else", 4))
2191 return else_command
;
2193 /* Check for while, if, break, continue, etc and build a new command
2194 line structure for them. */
2195 if (p1
- p
> 5 && !strncmp (p
, "while", 5))
2196 *command
= build_command_line (while_control
, p
+ 6);
2197 else if (p1
- p
> 2 && !strncmp (p
, "if", 2))
2198 *command
= build_command_line (if_control
, p
+ 3);
2199 else if (p1
- p
== 5 && !strncmp (p
, "loop_break", 5))
2201 *command
= (struct command_line
*)
2202 xmalloc (sizeof (struct command_line
));
2203 (*command
)->next
= NULL
;
2204 (*command
)->line
= NULL
;
2205 (*command
)->control_type
= break_control
;
2206 (*command
)->body_count
= 0;
2207 (*command
)->body_list
= NULL
;
2209 else if (p1
- p
== 8 && !strncmp (p
, "loop_continue", 8))
2211 *command
= (struct command_line
*)
2212 xmalloc (sizeof (struct command_line
));
2213 (*command
)->next
= NULL
;
2214 (*command
)->line
= NULL
;
2215 (*command
)->control_type
= continue_control
;
2216 (*command
)->body_count
= 0;
2217 (*command
)->body_list
= NULL
;
2221 /* A normal command. */
2222 *command
= (struct command_line
*)
2223 xmalloc (sizeof (struct command_line
));
2224 (*command
)->next
= NULL
;
2225 (*command
)->line
= savestring (p
, p1
- p
);
2226 (*command
)->control_type
= simple_control
;
2227 (*command
)->body_count
= 0;
2228 (*command
)->body_list
= NULL
;
2231 /* Nothing special. */
2235 /* Recursively read in the control structures and create a command_line
2238 The parent_control parameter is the control structure in which the
2239 following commands are nested. */
2241 static enum command_control_type
2242 recurse_read_control_structure (current_cmd
)
2243 struct command_line
*current_cmd
;
2245 int current_body
, i
;
2246 enum misc_command_type val
;
2247 enum command_control_type ret
;
2248 struct command_line
**body_ptr
, *child_tail
, *next
;
2249 struct cleanup
*old_chains
, *tmp_chains
;
2255 /* Sanity checks. */
2256 if (current_cmd
->control_type
== simple_control
)
2258 error ("Recursed on a simple control type\n");
2259 return invalid_control
;
2262 if (current_body
> current_cmd
->body_count
)
2264 error ("Allocated body is smaller than this command type needs\n");
2265 return invalid_control
;
2268 /* Read lines from the input stream and build control structures. */
2274 val
= read_next_line (&next
);
2276 /* Just skip blanks and comments. */
2277 if (val
== nop_command
)
2280 if (val
== end_command
)
2282 if (current_cmd
->control_type
== while_control
2283 || current_cmd
->control_type
== if_control
)
2285 /* Success reading an entire control structure. */
2286 ret
= simple_control
;
2291 ret
= invalid_control
;
2296 /* Not the end of a control structure. */
2297 if (val
== else_command
)
2299 if (current_cmd
->control_type
== if_control
2300 && current_body
== 1)
2302 realloc_body_list (current_cmd
, 2);
2309 ret
= invalid_control
;
2316 child_tail
->next
= next
;
2320 /* We have just read the first line of the child's control
2321 structure. From now on, arrange to throw away the line
2322 we have if we quit or get an error. */
2323 body_ptr
= current_cmd
->body_list
;
2324 for (i
= 1; i
< current_body
; i
++)
2329 tmp_chains
= make_cleanup (free_command_lines
, body_ptr
);
2332 old_chains
= tmp_chains
;
2337 /* If the latest line is another control structure, then recurse
2339 if (next
->control_type
== while_control
2340 || next
->control_type
== if_control
)
2343 ret
= recurse_read_control_structure (next
);
2346 if (ret
!= simple_control
)
2352 if (ret
== invalid_control
&& old_chains
)
2353 do_cleanups (old_chains
);
2354 else if (old_chains
)
2355 discard_cleanups (old_chains
);
2361 /* Read lines from the input stream
2362 and accumulate them in a chain of struct command_line's
2363 which is then returned. */
2365 struct command_line
*
2366 read_command_lines ()
2368 struct command_line
*head
, *tail
, *next
;
2369 struct cleanup
*old_chain
;
2370 enum command_control_type ret
;
2371 enum misc_command_type val
;
2378 val
= read_next_line (&next
);
2380 /* Ignore blank lines or comments. */
2381 if (val
== nop_command
)
2384 if (val
== end_command
)
2386 ret
= simple_control
;
2390 if (val
!= ok_command
)
2392 ret
= invalid_control
;
2396 if (next
->control_type
== while_control
2397 || next
->control_type
== if_control
)
2400 ret
= recurse_read_control_structure (next
);
2403 if (ret
== invalid_control
)
2414 old_chain
= make_cleanup (free_command_lines
, &head
);
2423 if (ret
!= invalid_control
)
2425 discard_cleanups (old_chain
);
2429 do_cleanups (old_chain
);
2435 /* Free a chain of struct command_line's. */
2438 free_command_lines (lptr
)
2439 struct command_line
**lptr
;
2441 register struct command_line
*l
= *lptr
;
2442 register struct command_line
*next
;
2443 struct command_line
**blist
;
2448 if (l
->body_count
> 0)
2450 blist
= l
->body_list
;
2451 for (i
= 0; i
< l
->body_count
; i
++, blist
++)
2452 free_command_lines (blist
);
2461 /* Add an element to the list of info subcommands. */
2464 add_info (name
, fun
, doc
)
2466 void (*fun
) PARAMS ((char *, int));
2469 add_cmd (name
, no_class
, fun
, doc
, &infolist
);
2472 /* Add an alias to the list of info subcommands. */
2475 add_info_alias (name
, oldname
, abbrev_flag
)
2480 add_alias_cmd (name
, oldname
, 0, abbrev_flag
, &infolist
);
2483 /* The "info" command is defined as a prefix, with allow_unknown = 0.
2484 Therefore, its own definition is called only for "info" with no args. */
2488 info_command (arg
, from_tty
)
2492 printf_unfiltered ("\"info\" must be followed by the name of an info command.\n");
2493 help_list (infolist
, "info ", -1, gdb_stdout
);
2496 /* The "complete" command is used by Emacs to implement completion. */
2500 complete_command (arg
, from_tty
)
2512 argpoint
= strlen (arg
);
2514 for (completion
= line_completion_function (arg
, i
= 0, arg
, argpoint
);
2516 completion
= line_completion_function (arg
, ++i
, arg
, argpoint
))
2518 printf_unfiltered ("%s\n", completion
);
2523 /* The "show" command with no arguments shows all the settings. */
2527 show_command (arg
, from_tty
)
2531 cmd_show_list (showlist
, from_tty
, "");
2534 /* Add an element to the list of commands. */
2537 add_com (name
, class, fun
, doc
)
2539 enum command_class
class;
2540 void (*fun
) PARAMS ((char *, int));
2543 add_cmd (name
, class, fun
, doc
, &cmdlist
);
2546 /* Add an alias or abbreviation command to the list of commands. */
2549 add_com_alias (name
, oldname
, class, abbrev_flag
)
2552 enum command_class
class;
2555 add_alias_cmd (name
, oldname
, class, abbrev_flag
, &cmdlist
);
2562 error ("Argument required (%s).", why
);
2567 help_command (command
, from_tty
)
2569 int from_tty
; /* Ignored */
2571 help_cmd (command
, gdb_stdout
);
2575 validate_comname (comname
)
2581 error_no_arg ("name of command to define");
2586 if (!isalnum(*p
) && *p
!= '-' && *p
!= '_')
2587 error ("Junk in argument list: \"%s\"", p
);
2592 /* This is just a placeholder in the command data structures. */
2594 user_defined_command (ignore
, from_tty
)
2601 define_command (comname
, from_tty
)
2605 register struct command_line
*cmds
;
2606 register struct cmd_list_element
*c
, *newc
, *hookc
= 0;
2607 char *tem
= comname
;
2608 #define HOOK_STRING "hook-"
2611 validate_comname (comname
);
2613 /* Look it up, and verify that we got an exact match. */
2614 c
= lookup_cmd (&tem
, cmdlist
, "", -1, 1);
2615 if (c
&& !STREQ (comname
, c
->name
))
2620 if (c
->class == class_user
|| c
->class == class_alias
)
2621 tem
= "Redefine command \"%s\"? ";
2623 tem
= "Really redefine built-in command \"%s\"? ";
2624 if (!query (tem
, c
->name
))
2625 error ("Command \"%s\" not redefined.", c
->name
);
2628 /* If this new command is a hook, then mark the command which it
2629 is hooking. Note that we allow hooking `help' commands, so that
2630 we can hook the `stop' pseudo-command. */
2632 if (!strncmp (comname
, HOOK_STRING
, HOOK_LEN
))
2634 /* Look up cmd it hooks, and verify that we got an exact match. */
2635 tem
= comname
+HOOK_LEN
;
2636 hookc
= lookup_cmd (&tem
, cmdlist
, "", -1, 0);
2637 if (hookc
&& !STREQ (comname
+HOOK_LEN
, hookc
->name
))
2641 warning ("Your new `%s' command does not hook any existing command.",
2643 if (!query ("Proceed? "))
2644 error ("Not confirmed.");
2648 comname
= savestring (comname
, strlen (comname
));
2650 /* If the rest of the commands will be case insensitive, this one
2651 should behave in the same manner. */
2652 for (tem
= comname
; *tem
; tem
++)
2653 if (isupper(*tem
)) *tem
= tolower(*tem
);
2657 printf_unfiltered ("Type commands for definition of \"%s\".\n\
2658 End with a line saying just \"end\".\n", comname
);
2659 gdb_flush (gdb_stdout
);
2663 cmds
= read_command_lines ();
2665 if (c
&& c
->class == class_user
)
2666 free_command_lines (&c
->user_commands
);
2668 newc
= add_cmd (comname
, class_user
, user_defined_command
,
2669 (c
&& c
->class == class_user
)
2670 ? c
->doc
: savestring ("User-defined.", 13), &cmdlist
);
2671 newc
->user_commands
= cmds
;
2673 /* If this new command is a hook, then mark both commands as being
2677 hookc
->hook
= newc
; /* Target gets hooked. */
2678 newc
->hookee
= hookc
; /* We are marked as hooking target cmd. */
2683 document_command (comname
, from_tty
)
2687 struct command_line
*doclines
;
2688 register struct cmd_list_element
*c
;
2689 char *tem
= comname
;
2691 validate_comname (comname
);
2693 c
= lookup_cmd (&tem
, cmdlist
, "", 0, 1);
2695 if (c
->class != class_user
)
2696 error ("Command \"%s\" is built-in.", comname
);
2699 printf_unfiltered ("Type documentation for \"%s\".\n\
2700 End with a line saying just \"end\".\n", comname
);
2702 doclines
= read_command_lines ();
2704 if (c
->doc
) free (c
->doc
);
2707 register struct command_line
*cl1
;
2708 register int len
= 0;
2710 for (cl1
= doclines
; cl1
; cl1
= cl1
->next
)
2711 len
+= strlen (cl1
->line
) + 1;
2713 c
->doc
= (char *) xmalloc (len
+ 1);
2716 for (cl1
= doclines
; cl1
; cl1
= cl1
->next
)
2718 strcat (c
->doc
, cl1
->line
);
2720 strcat (c
->doc
, "\n");
2724 free_command_lines (&doclines
);
2728 print_gnu_advertisement ()
2730 printf_unfiltered ("\
2731 GDB is free software and you are welcome to distribute copies of it\n\
2732 under certain conditions; type \"show copying\" to see the conditions.\n\
2733 There is absolutely no warranty for GDB; type \"show warranty\" for details.\n\
2738 print_gdb_version (stream
)
2741 fprintf_filtered (stream
, "\
2742 GDB %s (%s", version
, host_name
);
2744 if (!STREQ (host_name
, target_name
))
2745 fprintf_filtered (stream
, " --target %s", target_name
);
2747 fprintf_filtered (stream
, "), ");
2749 fprintf_filtered (stream
, "Copyright 1995 Free Software Foundation, Inc.");
2754 show_version (args
, from_tty
)
2759 print_gnu_advertisement ();
2760 print_gdb_version (gdb_stdout
);
2761 printf_filtered ("\n");
2765 /* xgdb calls this to reprint the usual GDB prompt. Obsolete now that xgdb
2771 printf_unfiltered ("%s", prompt
);
2772 gdb_flush (gdb_stdout
);
2776 quit_command (args
, from_tty
)
2782 /* An optional expression may be used to cause gdb to terminate with the
2783 value of that expression. */
2786 value_ptr val
= parse_and_eval (args
);
2788 exit_code
= (int) value_as_long (val
);
2791 if (inferior_pid
!= 0 && target_has_execution
)
2795 if (query ("The program is running. Quit anyway (and detach it)? "))
2796 target_detach (args
, from_tty
);
2798 error ("Not confirmed.");
2802 if (query ("The program is running. Quit anyway (and kill it)? "))
2805 error ("Not confirmed.");
2808 /* UDI wants this, to kill the TIP. */
2811 /* Save the history information if it is appropriate to do so. */
2812 if (write_history_p
&& history_filename
)
2813 write_history (history_filename
);
2818 /* Returns whether GDB is running on a terminal and whether the user
2819 desires that questions be asked of them on that terminal. */
2822 input_from_terminal_p ()
2824 return gdb_has_a_terminal () && (instream
== stdin
) & caution
;
2829 pwd_command (args
, from_tty
)
2833 if (args
) error ("The \"pwd\" command does not take an argument: %s", args
);
2834 getcwd (gdb_dirbuf
, sizeof (gdb_dirbuf
));
2836 if (!STREQ (gdb_dirbuf
, current_directory
))
2837 printf_unfiltered ("Working directory %s\n (canonically %s).\n",
2838 current_directory
, gdb_dirbuf
);
2840 printf_unfiltered ("Working directory %s.\n", current_directory
);
2844 cd_command (dir
, from_tty
)
2849 /* Found something other than leading repetitions of "/..". */
2850 int found_real_path
;
2853 /* If the new directory is absolute, repeat is a no-op; if relative,
2854 repeat might be useful but is more likely to be a mistake. */
2858 error_no_arg ("new working directory");
2860 dir
= tilde_expand (dir
);
2861 make_cleanup (free
, dir
);
2863 if (chdir (dir
) < 0)
2864 perror_with_name (dir
);
2867 dir
= savestring (dir
, len
- (len
> 1 && SLASH_P(dir
[len
-1])));
2869 current_directory
= dir
;
2872 if (SLASH_P (current_directory
[0]) && current_directory
[1] == '\0')
2873 current_directory
= concat (current_directory
, dir
, NULL
);
2875 current_directory
= concat (current_directory
, SLASH_STRING
, dir
, NULL
);
2879 /* Now simplify any occurrences of `.' and `..' in the pathname. */
2881 found_real_path
= 0;
2882 for (p
= current_directory
; *p
;)
2884 if (SLASH_P (p
[0]) && p
[1] == '.' && (p
[2] == 0 || SLASH_P (p
[2])))
2886 else if (SLASH_P (p
[0]) && p
[1] == '.' && p
[2] == '.'
2887 && (p
[3] == 0 || SLASH_P (p
[3])))
2889 if (found_real_path
)
2891 /* Search backwards for the directory just before the "/.."
2892 and obliterate it and the "/..". */
2894 while (q
!= current_directory
&& ! SLASH_P (q
[-1]))
2897 if (q
== current_directory
)
2898 /* current_directory is
2899 a relative pathname ("can't happen"--leave it alone). */
2903 strcpy (q
- 1, p
+ 3);
2908 /* We are dealing with leading repetitions of "/..", for example
2909 "/../..", which is the Mach super-root. */
2914 found_real_path
= 1;
2919 forget_cached_source_info ();
2922 pwd_command ((char *) 0, 1);
2925 struct source_cleanup_lines_args
{
2928 char *old_pre_error
;
2929 char *old_error_pre_print
;
2933 source_cleanup_lines (args
)
2936 struct source_cleanup_lines_args
*p
=
2937 (struct source_cleanup_lines_args
*)args
;
2938 source_line_number
= p
->old_line
;
2939 source_file_name
= p
->old_file
;
2940 source_pre_error
= p
->old_pre_error
;
2941 error_pre_print
= p
->old_error_pre_print
;
2946 source_command (args
, from_tty
)
2951 struct cleanup
*old_cleanups
;
2953 struct source_cleanup_lines_args old_lines
;
2958 error ("source command requires pathname of file to source.");
2961 file
= tilde_expand (file
);
2962 old_cleanups
= make_cleanup (free
, file
);
2964 stream
= fopen (file
, FOPEN_RT
);
2966 perror_with_name (file
);
2968 make_cleanup (fclose
, stream
);
2970 old_lines
.old_line
= source_line_number
;
2971 old_lines
.old_file
= source_file_name
;
2972 old_lines
.old_pre_error
= source_pre_error
;
2973 old_lines
.old_error_pre_print
= error_pre_print
;
2974 make_cleanup (source_cleanup_lines
, &old_lines
);
2975 source_line_number
= 0;
2976 source_file_name
= file
;
2977 source_pre_error
= error_pre_print
== NULL
? "" : error_pre_print
;
2978 source_pre_error
= savestring (source_pre_error
, strlen (source_pre_error
));
2979 make_cleanup (free
, source_pre_error
);
2980 /* This will get set every time we read a line. So it won't stay "" for
2982 error_pre_print
= "";
2984 needed_length
= strlen (source_file_name
) + strlen (source_pre_error
) + 80;
2985 if (source_error_allocated
< needed_length
)
2987 source_error_allocated
*= 2;
2988 if (source_error_allocated
< needed_length
)
2989 source_error_allocated
= needed_length
;
2990 if (source_error
== NULL
)
2991 source_error
= xmalloc (source_error_allocated
);
2993 source_error
= xrealloc (source_error
, source_error_allocated
);
2996 read_command_file (stream
);
2998 do_cleanups (old_cleanups
);
3003 echo_command (text
, from_tty
)
3011 while ((c
= *p
++) != '\0')
3015 /* \ at end of argument is used after spaces
3016 so they won't be lost. */
3020 c
= parse_escape (&p
);
3022 printf_filtered ("%c", c
);
3025 printf_filtered ("%c", c
);
3028 /* Force this output to appear now. */
3030 gdb_flush (gdb_stdout
);
3034 #ifdef TARGET_BYTE_ORDER_SELECTABLE
3036 /* Functions to manipulate the endianness of the target. */
3038 #ifndef TARGET_BYTE_ORDER_DEFAULT
3039 #define TARGET_BYTE_ORDER_DEFAULT BIG_ENDIAN
3042 int target_byte_order
= TARGET_BYTE_ORDER_DEFAULT
;
3044 static int target_byte_order_auto
= 1;
3046 /* Called if the user enters ``set endian'' without an argument. */
3048 set_endian (args
, from_tty
)
3052 printf_unfiltered ("\"set endian\" must be followed by \"auto\", \"big\" or \"little\".\n");
3053 show_endian (args
, from_tty
);
3056 /* Called by ``set endian big''. */
3058 set_endian_big (args
, from_tty
)
3062 target_byte_order
= BIG_ENDIAN
;
3063 target_byte_order_auto
= 0;
3066 /* Called by ``set endian little''. */
3068 set_endian_little (args
, from_tty
)
3072 target_byte_order
= LITTLE_ENDIAN
;
3073 target_byte_order_auto
= 0;
3076 /* Called by ``set endian auto''. */
3078 set_endian_auto (args
, from_tty
)
3082 target_byte_order_auto
= 1;
3085 /* Called by ``show endian''. */
3087 show_endian (args
, from_tty
)
3092 (target_byte_order_auto
3093 ? "The target endianness is set automatically (currently %s endian)\n"
3094 : "The target is assumed to be %s endian\n");
3095 printf_unfiltered ((char *) msg
, TARGET_BYTE_ORDER
== BIG_ENDIAN
? "big" : "little");
3098 #endif /* defined (TARGET_BYTE_ORDER_SELECTABLE) */
3100 /* Set the endianness from a BFD. */
3102 set_endian_from_file (abfd
)
3105 #ifdef TARGET_BYTE_ORDER_SELECTABLE
3108 if (abfd
->xvec
->byteorder_big_p
)
3111 want
= LITTLE_ENDIAN
;
3112 if (target_byte_order_auto
)
3113 target_byte_order
= want
;
3114 else if (target_byte_order
!= want
)
3115 warning ("%s endian file does not match %s endian target.",
3116 want
== BIG_ENDIAN
? "big" : "little",
3117 TARGET_BYTE_ORDER
== BIG_ENDIAN
? "big" : "little");
3119 #else /* ! defined (TARGET_BYTE_ORDER_SELECTABLE) */
3121 if (abfd
->xvec
->byteorder_big_p
3122 ? TARGET_BYTE_ORDER
!= BIG_ENDIAN
3123 : TARGET_BYTE_ORDER
== BIG_ENDIAN
)
3124 warning ("%s endian file does not match %s endian target.",
3125 abfd
->xvec
->byteorder_big_p
? "big" : "little",
3126 TARGET_BYTE_ORDER
== BIG_ENDIAN
? "big" : "little");
3128 #endif /* ! defined (TARGET_BYTE_ORDER_SELECTABLE) */
3131 /* Functions to manipulate command line editing control variables. */
3133 /* Number of commands to print in each call to show_commands. */
3134 #define Hist_print 10
3136 show_commands (args
, from_tty
)
3140 /* Index for history commands. Relative to history_base. */
3143 /* Number of the history entry which we are planning to display next.
3144 Relative to history_base. */
3147 /* The first command in the history which doesn't exist (i.e. one more
3148 than the number of the last command). Relative to history_base. */
3151 extern HIST_ENTRY
*history_get
PARAMS ((int));
3153 /* Print out some of the commands from the command history. */
3154 /* First determine the length of the history list. */
3155 hist_len
= history_size
;
3156 for (offset
= 0; offset
< history_size
; offset
++)
3158 if (!history_get (history_base
+ offset
))
3167 if (args
[0] == '+' && args
[1] == '\0')
3168 /* "info editing +" should print from the stored position. */
3171 /* "info editing <exp>" should print around command number <exp>. */
3172 num
= (parse_and_eval_address (args
) - history_base
) - Hist_print
/ 2;
3174 /* "show commands" means print the last Hist_print commands. */
3177 num
= hist_len
- Hist_print
;
3183 /* If there are at least Hist_print commands, we want to display the last
3184 Hist_print rather than, say, the last 6. */
3185 if (hist_len
- num
< Hist_print
)
3187 num
= hist_len
- Hist_print
;
3192 for (offset
= num
; offset
< num
+ Hist_print
&& offset
< hist_len
; offset
++)
3194 printf_filtered ("%5d %s\n", history_base
+ offset
,
3195 (history_get (history_base
+ offset
))->line
);
3198 /* The next command we want to display is the next one that we haven't
3202 /* If the user repeats this command with return, it should do what
3203 "show commands +" does. This is unnecessary if arg is null,
3204 because "show commands +" is not useful after "show commands". */
3205 if (from_tty
&& args
)
3212 /* Called by do_setshow_command. */
3215 set_history_size_command (args
, from_tty
, c
)
3218 struct cmd_list_element
*c
;
3220 if (history_size
== INT_MAX
)
3221 unstifle_history ();
3222 else if (history_size
>= 0)
3223 stifle_history (history_size
);
3226 history_size
= INT_MAX
;
3227 error ("History size must be non-negative");
3233 set_history (args
, from_tty
)
3237 printf_unfiltered ("\"set history\" must be followed by the name of a history subcommand.\n");
3238 help_list (sethistlist
, "set history ", -1, gdb_stdout
);
3243 show_history (args
, from_tty
)
3247 cmd_show_list (showhistlist
, from_tty
, "");
3250 int info_verbose
= 0; /* Default verbose msgs off */
3252 /* Called by do_setshow_command. An elaborate joke. */
3255 set_verbose (args
, from_tty
, c
)
3258 struct cmd_list_element
*c
;
3260 char *cmdname
= "verbose";
3261 struct cmd_list_element
*showcmd
;
3263 showcmd
= lookup_cmd_1 (&cmdname
, showlist
, NULL
, 1);
3267 c
->doc
= "Set verbose printing of informational messages.";
3268 showcmd
->doc
= "Show verbose printing of informational messages.";
3272 c
->doc
= "Set verbosity.";
3273 showcmd
->doc
= "Show verbosity.";
3278 float_handler (signo
)
3281 /* This message is based on ANSI C, section 4.7. Note that integer
3282 divide by zero causes this, so "float" is a misnomer. */
3283 signal (SIGFPE
, float_handler
);
3284 error ("Erroneous arithmetic operation.");
3296 enablebreaklist
= NULL
;
3300 #ifdef TARGET_BYTE_ORDER_SELECTABLE
3304 showhistlist
= NULL
;
3305 unsethistlist
= NULL
;
3306 #if MAINTENANCE_CMDS
3307 maintenancelist
= NULL
;
3308 maintenanceinfolist
= NULL
;
3309 maintenanceprintlist
= NULL
;
3311 setprintlist
= NULL
;
3312 showprintlist
= NULL
;
3313 setchecklist
= NULL
;
3314 showchecklist
= NULL
;
3317 /* Init the history buffer. Note that we are called after the init file(s)
3318 * have been read so that the user can change the history file via his
3319 * .gdbinit file (for instance). The GDBHISTFILE environment variable
3320 * overrides all of this.
3328 tmpenv
= getenv ("HISTSIZE");
3330 history_size
= atoi (tmpenv
);
3331 else if (!history_size
)
3334 stifle_history (history_size
);
3336 tmpenv
= getenv ("GDBHISTFILE");
3338 history_filename
= savestring (tmpenv
, strlen(tmpenv
));
3339 else if (!history_filename
) {
3340 /* We include the current directory so that if the user changes
3341 directories the file written will be the same as the one
3343 history_filename
= concat (current_directory
, "/.gdb_history", NULL
);
3345 read_history (history_filename
);
3351 struct cmd_list_element
*c
;
3353 #ifdef TARGET_BYTE_ORDER_SELECTABLE
3355 add_prefix_cmd ("endian", class_support
, set_endian
,
3356 "Set endianness of target.",
3357 &endianlist
, "set endian ", 0, &setlist
);
3358 add_cmd ("big", class_support
, set_endian_big
,
3359 "Set target as being big endian.", &endianlist
);
3360 add_cmd ("little", class_support
, set_endian_little
,
3361 "Set target as being little endian.", &endianlist
);
3362 add_cmd ("auto", class_support
, set_endian_auto
,
3363 "Select target endianness automatically.", &endianlist
);
3364 add_cmd ("endian", class_support
, show_endian
,
3365 "Show endianness of target.", &showlist
);
3367 #endif /* defined (TARGET_BYTE_ORDER_SELECTABLE) */
3369 #ifdef DEFAULT_PROMPT
3370 prompt
= savestring (DEFAULT_PROMPT
, strlen(DEFAULT_PROMPT
));
3372 prompt
= savestring ("(gdb) ", 6);
3375 /* Set the important stuff up for command editing. */
3376 command_editing_p
= 1;
3377 history_expansion_p
= 0;
3378 write_history_p
= 0;
3380 /* Setup important stuff for command line editing. */
3381 rl_completion_entry_function
= (int (*)()) readline_line_completion_function
;
3382 rl_completer_word_break_characters
= gdb_completer_word_break_characters
;
3383 rl_completer_quote_characters
= gdb_completer_quote_characters
;
3384 rl_readline_name
= "gdb";
3386 /* Define the classes of commands.
3387 They will appear in the help list in the reverse of this order. */
3389 add_cmd ("internals", class_maintenance
, NO_FUNCTION
,
3390 "Maintenance commands.\n\
3391 Some gdb commands are provided just for use by gdb maintainers.\n\
3392 These commands are subject to frequent change, and may not be as\n\
3393 well documented as user commands.",
3395 add_cmd ("obscure", class_obscure
, NO_FUNCTION
, "Obscure features.", &cmdlist
);
3396 add_cmd ("aliases", class_alias
, NO_FUNCTION
, "Aliases of other commands.", &cmdlist
);
3397 add_cmd ("user-defined", class_user
, NO_FUNCTION
, "User-defined commands.\n\
3398 The commands in this class are those defined by the user.\n\
3399 Use the \"define\" command to define a command.", &cmdlist
);
3400 add_cmd ("support", class_support
, NO_FUNCTION
, "Support facilities.", &cmdlist
);
3401 add_cmd ("status", class_info
, NO_FUNCTION
, "Status inquiries.", &cmdlist
);
3402 add_cmd ("files", class_files
, NO_FUNCTION
, "Specifying and examining files.", &cmdlist
);
3403 add_cmd ("breakpoints", class_breakpoint
, NO_FUNCTION
, "Making program stop at certain points.", &cmdlist
);
3404 add_cmd ("data", class_vars
, NO_FUNCTION
, "Examining data.", &cmdlist
);
3405 add_cmd ("stack", class_stack
, NO_FUNCTION
, "Examining the stack.\n\
3406 The stack is made up of stack frames. Gdb assigns numbers to stack frames\n\
3407 counting from zero for the innermost (currently executing) frame.\n\n\
3408 At any time gdb identifies one frame as the \"selected\" frame.\n\
3409 Variable lookups are done with respect to the selected frame.\n\
3410 When the program being debugged stops, gdb selects the innermost frame.\n\
3411 The commands below can be used to select other frames by number or address.",
3413 add_cmd ("running", class_run
, NO_FUNCTION
, "Running the program.", &cmdlist
);
3415 add_com ("pwd", class_files
, pwd_command
,
3416 "Print working directory. This is used for your program as well.");
3417 c
= add_cmd ("cd", class_files
, cd_command
,
3418 "Set working directory to DIR for debugger and program being debugged.\n\
3419 The change does not take effect for the program being debugged\n\
3420 until the next time it is started.", &cmdlist
);
3421 c
->completer
= filename_completer
;
3424 (add_set_cmd ("prompt", class_support
, var_string
, (char *)&prompt
,
3429 add_com ("echo", class_support
, echo_command
,
3430 "Print a constant string. Give string as argument.\n\
3431 C escape sequences may be used in the argument.\n\
3432 No newline is added at the end of the argument;\n\
3433 use \"\\n\" if you want a newline to be printed.\n\
3434 Since leading and trailing whitespace are ignored in command arguments,\n\
3435 if you want to print some you must use \"\\\" before leading whitespace\n\
3436 to be printed or after trailing whitespace.");
3437 add_com ("document", class_support
, document_command
,
3438 "Document a user-defined command.\n\
3439 Give command name as argument. Give documentation on following lines.\n\
3440 End with a line of just \"end\".");
3441 add_com ("define", class_support
, define_command
,
3442 "Define a new command name. Command name is argument.\n\
3443 Definition appears on following lines, one command per line.\n\
3444 End with a line of just \"end\".\n\
3445 Use the \"document\" command to give documentation for the new command.\n\
3446 Commands defined in this way may have up to ten arguments.");
3449 c
= add_cmd ("source", class_support
, source_command
,
3450 "Read commands from a file named FILE.\n\
3451 Note that the file \"" GDBINIT_FILENAME
"\" is read automatically in this way\n\
3452 when gdb is started.", &cmdlist
);
3454 /* Punt file name, we can't help it easily. */
3455 c
= add_cmd ("source", class_support
, source_command
,
3456 "Read commands from a file named FILE.\n\
3457 Note that the file \".gdbinit\" is read automatically in this way\n\
3458 when gdb is started.", &cmdlist
);
3460 c
->completer
= filename_completer
;
3462 add_com ("quit", class_support
, quit_command
, "Exit gdb.");
3463 add_com ("help", class_support
, help_command
, "Print list of commands.");
3464 add_com_alias ("q", "quit", class_support
, 1);
3465 add_com_alias ("h", "help", class_support
, 1);
3468 c
= add_set_cmd ("verbose", class_support
, var_boolean
, (char *)&info_verbose
,
3471 add_show_from_set (c
, &showlist
);
3472 c
->function
.sfunc
= set_verbose
;
3473 set_verbose (NULL
, 0, c
);
3476 (add_set_cmd ("editing", class_support
, var_boolean
, (char *)&command_editing_p
,
3477 "Set editing of command lines as they are typed.\n\
3478 Use \"on\" to enable to enable the editing, and \"off\" to disable it.\n\
3479 Without an argument, command line editing is enabled. To edit, use\n\
3480 EMACS-like or VI-like commands like control-P or ESC.", &setlist
),
3483 add_prefix_cmd ("history", class_support
, set_history
,
3484 "Generic command for setting command history parameters.",
3485 &sethistlist
, "set history ", 0, &setlist
);
3486 add_prefix_cmd ("history", class_support
, show_history
,
3487 "Generic command for showing command history parameters.",
3488 &showhistlist
, "show history ", 0, &showlist
);
3491 (add_set_cmd ("expansion", no_class
, var_boolean
, (char *)&history_expansion_p
,
3492 "Set history expansion on command input.\n\
3493 Without an argument, history expansion is enabled.", &sethistlist
),
3497 (add_set_cmd ("save", no_class
, var_boolean
, (char *)&write_history_p
,
3498 "Set saving of the history record on exit.\n\
3499 Use \"on\" to enable to enable the saving, and \"off\" to disable it.\n\
3500 Without an argument, saving is enabled.", &sethistlist
),
3503 c
= add_set_cmd ("size", no_class
, var_integer
, (char *)&history_size
,
3504 "Set the size of the command history, \n\
3505 ie. the number of previous commands to keep a record of.", &sethistlist
);
3506 add_show_from_set (c
, &showhistlist
);
3507 c
->function
.sfunc
= set_history_size_command
;
3510 (add_set_cmd ("filename", no_class
, var_filename
, (char *)&history_filename
,
3511 "Set the filename in which to record the command history\n\
3512 (the list of previous commands of which a record is kept).", &sethistlist
),
3516 (add_set_cmd ("confirm", class_support
, var_boolean
,
3518 "Set whether to confirm potentially dangerous operations.",
3522 add_prefix_cmd ("info", class_info
, info_command
,
3523 "Generic command for showing things about the program being debugged.",
3524 &infolist
, "info ", 0, &cmdlist
);
3525 add_com_alias ("i", "info", class_info
, 1);
3527 add_com ("complete", class_obscure
, complete_command
,
3528 "List the completions for the rest of the line as a command.");
3530 add_prefix_cmd ("show", class_info
, show_command
,
3531 "Generic command for showing things about the debugger.",
3532 &showlist
, "show ", 0, &cmdlist
);
3533 /* Another way to get at the same thing. */
3534 add_info ("set", show_command
, "Show all GDB settings.");
3536 add_cmd ("commands", no_class
, show_commands
,
3537 "Show the history of commands you typed.\n\
3538 You can supply a command number to start with, or a `+' to start after\n\
3539 the previous command number shown.",
3542 add_cmd ("version", no_class
, show_version
,
3543 "Show what version of GDB this is.", &showlist
);
3545 add_com ("while", class_support
, while_command
,
3546 "Execute nested commands WHILE the conditional expression is non zero.\n\
3547 The conditional expression must follow the word `while' and must in turn be\n\
3548 followed by a new line. The nested commands must be entered one per line,\n\
3549 and should be terminated by the word `end'.");
3551 add_com ("if", class_support
, if_command
,
3552 "Execute nested commands once IF the conditional expression is non zero.\n\
3553 The conditional expression must follow the word `if' and must in turn be\n\
3554 followed by a new line. The nested commands must be entered one per line,\n\
3555 and should be terminated by the word 'else' or `end'. If an else clause\n\
3556 is used, the same rules apply to its nested commands as to the first ones.");
3558 /* If target is open when baud changes, it doesn't take effect until the
3559 next open (I think, not sure). */
3560 add_show_from_set (add_set_cmd ("remotebaud", no_class
,
3561 var_zinteger
, (char *)&baud_rate
,
3562 "Set baud rate for remote serial I/O.\n\
3563 This value is used to set the speed of the serial port when debugging\n\
3564 using remote targets.", &setlist
),
3568 add_set_cmd ("remotedebug", no_class
, var_zinteger
, (char *)&remote_debug
,
3569 "Set debugging of remote protocol.\n\
3570 When enabled, each packet sent or received with the remote target\n\
3571 is displayed.", &setlist
),