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
;
653 error ("if/while commands require arguments.\n");
655 cmd
= (struct command_line
*)xmalloc (sizeof (struct command_line
));
657 cmd
->control_type
= type
;
661 = (struct command_line
**)xmalloc (sizeof (struct command_line
*)
663 memset (cmd
->body_list
, 0, sizeof (struct command_line
*) * cmd
->body_count
);
664 cmd
->line
= savestring (args
, strlen (args
));
668 /* Build and return a new command structure for the control commands
669 such as "if" and "while". */
671 static struct command_line
*
672 get_command_line (type
, arg
)
673 enum command_control_type type
;
676 struct command_line
*cmd
;
677 struct cleanup
*old_chain
= NULL
;
679 /* Allocate and build a new command line structure. */
680 cmd
= build_command_line (type
, arg
);
682 old_chain
= make_cleanup (free_command_lines
, &cmd
);
684 /* Read in the body of this command. */
685 if (recurse_read_control_structure (cmd
) == invalid_control
)
687 warning ("error reading in control structure\n");
688 do_cleanups (old_chain
);
692 discard_cleanups (old_chain
);
696 /* Recursively print a command (including full control structures). */
698 print_command_line (cmd
, depth
)
699 struct command_line
*cmd
;
706 for (i
= 0; i
< depth
; i
++)
707 fputs_filtered (" ", gdb_stdout
);
710 /* A simple command, print it and return. */
711 if (cmd
->control_type
== simple_control
)
713 fputs_filtered (cmd
->line
, gdb_stdout
);
714 fputs_filtered ("\n", gdb_stdout
);
718 /* loop_continue to jump to the start of a while loop, print it
720 if (cmd
->control_type
== continue_control
)
722 fputs_filtered ("loop_continue\n", gdb_stdout
);
726 /* loop_break to break out of a while loop, print it and return. */
727 if (cmd
->control_type
== break_control
)
729 fputs_filtered ("loop_break\n", gdb_stdout
);
733 /* A while command. Recursively print its subcommands before returning. */
734 if (cmd
->control_type
== while_control
)
736 struct command_line
*list
;
737 fputs_filtered ("while ", gdb_stdout
);
738 fputs_filtered (cmd
->line
, gdb_stdout
);
739 fputs_filtered ("\n", gdb_stdout
);
740 list
= *cmd
->body_list
;
743 print_command_line (list
, depth
+ 1);
748 /* An if command. Recursively print both arms before returning. */
749 if (cmd
->control_type
== if_control
)
751 fputs_filtered ("if ", gdb_stdout
);
752 fputs_filtered (cmd
->line
, gdb_stdout
);
753 fputs_filtered ("\n", gdb_stdout
);
755 print_command_line (cmd
->body_list
[0], depth
+ 1);
757 /* Show the false arm if it exists. */
758 if (cmd
->body_count
== 2)
762 for (i
= 0; i
< depth
; i
++)
763 fputs_filtered (" ", gdb_stdout
);
765 fputs_filtered ("else\n", gdb_stdout
);
766 print_command_line (cmd
->body_list
[1], depth
+ 1);
770 for (i
= 0; i
< depth
; i
++)
771 fputs_filtered (" ", gdb_stdout
);
773 fputs_filtered ("end\n", gdb_stdout
);
777 /* Execute the command in CMD. */
779 enum command_control_type
780 execute_control_command (cmd
)
781 struct command_line
*cmd
;
783 struct expression
*expr
;
784 struct command_line
*current
;
785 struct cleanup
*old_chain
= 0;
788 enum command_control_type ret
;
791 switch (cmd
->control_type
)
794 /* A simple command, execute it and return. */
795 new_line
= insert_args (cmd
->line
);
797 return invalid_control
;
798 old_chain
= make_cleanup (free_current_contents
, &new_line
);
799 execute_command (new_line
, 0);
800 ret
= cmd
->control_type
;
803 case continue_control
:
805 /* Return for "continue", and "break" so we can either
806 continue the loop at the top, or break out. */
807 ret
= cmd
->control_type
;
812 /* Parse the loop control expression for the while statement. */
813 new_line
= insert_args (cmd
->line
);
815 return invalid_control
;
816 old_chain
= make_cleanup (free_current_contents
, &new_line
);
817 expr
= parse_expression (new_line
);
818 make_cleanup (free_current_contents
, &expr
);
820 ret
= simple_control
;
823 /* Keep iterating so long as the expression is true. */
826 /* Evaluate the expression. */
827 val
= evaluate_expression (expr
);
829 /* If the value is false, then break out of the loop. */
830 if (!value_true (val
))
833 /* Execute the body of the while statement. */
834 current
= *cmd
->body_list
;
837 ret
= execute_control_command (current
);
839 /* If we got an error, or a "break" command, then stop
841 if (ret
== invalid_control
|| ret
== break_control
)
847 /* If we got a "continue" command, then restart the loop
849 if (ret
== continue_control
)
852 /* Get the next statement. */
853 current
= current
->next
;
857 /* Reset RET so that we don't recurse the break all the way down. */
858 if (ret
== break_control
)
859 ret
= simple_control
;
866 new_line
= insert_args (cmd
->line
);
868 return invalid_control
;
869 old_chain
= make_cleanup (free_current_contents
, &new_line
);
870 /* Parse the conditional for the if statement. */
871 expr
= parse_expression (new_line
);
872 make_cleanup (free_current_contents
, &expr
);
875 ret
= simple_control
;
877 /* Evaluate the conditional. */
878 val
= evaluate_expression (expr
);
880 /* Choose which arm to take commands from based on the value of the
881 conditional expression. */
882 if (value_true (val
))
883 current
= *cmd
->body_list
;
884 else if (cmd
->body_count
== 2)
885 current
= *(cmd
->body_list
+ 1);
887 /* Execute commands in the given arm. */
890 ret
= execute_control_command (current
);
892 /* If we got an error, get out. */
893 if (ret
!= simple_control
)
896 /* Get the next statement in the body. */
897 current
= current
->next
;
904 warning ("Invalid control type in command structure.");
905 return invalid_control
;
909 do_cleanups (old_chain
);
914 /* "while" command support. Executes a body of statements while the
915 loop condition is nonzero. */
918 while_command (arg
, from_tty
)
922 struct command_line
*command
= NULL
;
925 command
= get_command_line (while_control
, arg
);
930 execute_control_command (command
);
931 free_command_lines (&command
);
934 /* "if" command support. Execute either the true or false arm depending
935 on the value of the if conditional. */
938 if_command (arg
, from_tty
)
942 struct command_line
*command
= NULL
;
945 command
= get_command_line (if_control
, arg
);
950 execute_control_command (command
);
951 free_command_lines (&command
);
958 struct user_args
*oargs
= user_args
;
960 fatal ("Internal error, arg_cleanup called with no user args.\n");
962 user_args
= user_args
->next
;
966 /* Bind the incomming arguments for a user defined command to
967 $arg0, $arg1 ... $argMAXUSERARGS. */
969 static struct cleanup
*
973 struct user_args
*args
;
974 struct cleanup
*old_chain
;
975 unsigned int arg_count
= 0;
977 args
= (struct user_args
*)xmalloc (sizeof (struct user_args
));
978 memset (args
, 0, sizeof (struct user_args
));
980 args
->next
= user_args
;
983 old_chain
= make_cleanup (arg_cleanup
, 0);
992 if (arg_count
>= MAXUSERARGS
)
994 error ("user defined function may only have %d arguments.\n",
999 /* Strip whitespace. */
1000 while (*p
== ' ' || *p
== '\t')
1003 /* P now points to an argument. */
1005 user_args
->a
[arg_count
].arg
= p
;
1007 /* Get to the end of this argument. */
1008 while (*p
&& *p
!= ' ' && *p
!= '\t')
1011 user_args
->a
[arg_count
].len
= p
- start_arg
;
1018 /* Given character string P, return a point to the first argument ($arg),
1019 or NULL if P contains no arguments. */
1025 while ((p
= strchr (p
, '$')))
1027 if (strncmp (p
, "$arg", 4) == 0 && isdigit (p
[4]))
1034 /* Insert the user defined arguments stored in user_arg into the $arg
1035 arguments found in line, with the updated copy being placed into nline. */
1041 char *p
, *save_line
, *new_line
;
1044 /* First we need to know how much memory to allocate for the new line. */
1047 while ((p
= locate_arg (line
)))
1052 if (i
>= user_args
->count
)
1054 error ("Missing argument %d in user function.\n", i
);
1057 len
+= user_args
->a
[i
].len
;
1061 /* Don't forget the tail. */
1062 len
+= strlen (line
);
1064 /* Allocate space for the new line and fill it in. */
1065 new_line
= (char *)xmalloc (len
+ 1);
1066 if (new_line
== NULL
)
1069 /* Restore pointer to beginning of old line. */
1072 /* Save pointer to beginning of new line. */
1073 save_line
= new_line
;
1075 while ((p
= locate_arg (line
)))
1079 memcpy (new_line
, line
, p
- line
);
1080 new_line
+= p
- line
;
1083 len
= user_args
->a
[i
].len
;
1086 memcpy (new_line
, user_args
->a
[i
].arg
, len
);
1091 /* Don't forget the tail. */
1092 strcpy (new_line
, line
);
1094 /* Return a pointer to the beginning of the new line. */
1099 execute_user_command (c
, args
)
1100 struct cmd_list_element
*c
;
1103 register struct command_line
*cmdlines
;
1104 struct cleanup
*old_chain
;
1105 enum command_control_type ret
;
1107 old_chain
= setup_user_args (args
);
1109 cmdlines
= c
->user_commands
;
1114 /* Set the instream to 0, indicating execution of a
1115 user-defined function. */
1116 old_chain
= make_cleanup (source_cleanup
, instream
);
1117 instream
= (FILE *) 0;
1120 ret
= execute_control_command (cmdlines
);
1121 if (ret
!= simple_control
&& ret
!= break_control
)
1123 warning ("Error in control structure.\n");
1126 cmdlines
= cmdlines
->next
;
1128 do_cleanups (old_chain
);
1131 /* Execute the line P as a command.
1132 Pass FROM_TTY as second argument to the defining function. */
1135 execute_command (p
, from_tty
)
1139 register struct cmd_list_element
*c
;
1140 register enum language flang
;
1141 static int warned
= 0;
1145 /* This can happen when command_line_input hits end of file. */
1149 while (*p
== ' ' || *p
== '\t') p
++;
1154 c
= lookup_cmd (&p
, cmdlist
, "", 0, 1);
1155 /* Pass null arg rather than an empty one. */
1158 /* Clear off trailing whitespace, except for set and complete command. */
1159 if (arg
&& c
->type
!= set_cmd
&& c
->function
.cfunc
!= complete_command
)
1161 p
= arg
+ strlen (arg
) - 1;
1162 while (p
>= arg
&& (*p
== ' ' || *p
== '\t'))
1167 /* If this command has been hooked, run the hook first. */
1169 execute_user_command (c
->hook
, (char *)0);
1171 if (c
->class == class_user
)
1172 execute_user_command (c
, arg
);
1173 else if (c
->type
== set_cmd
|| c
->type
== show_cmd
)
1174 do_setshow_command (arg
, from_tty
& caution
, c
);
1175 else if (c
->function
.cfunc
== NO_FUNCTION
)
1176 error ("That is not a command, just a help topic.");
1177 else if (call_command_hook
)
1178 call_command_hook (c
, arg
, from_tty
& caution
);
1180 (*c
->function
.cfunc
) (arg
, from_tty
& caution
);
1183 /* Tell the user if the language has changed (except first time). */
1184 if (current_language
!= expected_language
)
1186 if (language_mode
== language_mode_auto
) {
1187 language_info (1); /* Print what changed. */
1192 /* Warn the user if the working language does not match the
1193 language of the current frame. Only warn the user if we are
1194 actually running the program, i.e. there is a stack. */
1195 /* FIXME: This should be cacheing the frame and only running when
1196 the frame changes. */
1198 if (target_has_stack
)
1200 flang
= get_frame_language ();
1202 && flang
!= language_unknown
1203 && flang
!= current_language
->la_language
)
1205 printf_filtered ("%s\n", lang_frame_mismatch_warn
);
1213 command_loop_marker (foo
)
1218 /* Read commands from `instream' and execute them
1219 until end of file or error reading instream. */
1224 struct cleanup
*old_chain
;
1226 int stdin_is_tty
= ISATTY (stdin
);
1227 long time_at_cmd_start
;
1228 long space_at_cmd_start
;
1229 extern int display_time
;
1230 extern int display_space
;
1232 while (!feof (instream
))
1234 if (window_hook
&& instream
== stdin
)
1235 (*window_hook
) (instream
, prompt
);
1238 if (instream
== stdin
&& stdin_is_tty
)
1239 reinitialize_more_filter ();
1240 old_chain
= make_cleanup (command_loop_marker
, 0);
1241 command
= command_line_input (instream
== stdin
? prompt
: (char *) NULL
,
1242 instream
== stdin
, "prompt");
1246 time_at_cmd_start
= get_run_time ();
1250 extern char **environ
;
1251 char *lim
= (char *) sbrk (0);
1253 space_at_cmd_start
= (long) (lim
- (char *) &environ
);
1256 execute_command (command
, instream
== stdin
);
1257 /* Do any commands attached to breakpoint we stopped at. */
1258 bpstat_do_actions (&stop_bpstat
);
1259 do_cleanups (old_chain
);
1263 long cmd_time
= get_run_time () - time_at_cmd_start
;
1265 printf_unfiltered ("Command execution time: %ld.%06ld\n",
1266 cmd_time
/ 1000000, cmd_time
% 1000000);
1271 extern char **environ
;
1272 char *lim
= (char *) sbrk (0);
1273 long space_now
= lim
- (char *) &environ
;
1274 long space_diff
= space_now
- space_at_cmd_start
;
1276 printf_unfiltered ("Space used: %ld (%c%ld for this command)\n",
1278 (space_diff
>= 0 ? '+' : '-'),
1284 /* Commands call this if they do not want to be repeated by null lines. */
1292 /* If we aren't reading from standard input, we are saving the last
1293 thing read from stdin in line and don't want to delete it. Null lines
1294 won't repeat here in any case. */
1295 if (instream
== stdin
)
1299 /* Read a line from the stream "instream" without command line editing.
1301 It prints PRROMPT once at the start.
1302 Action is compatible with "readline", e.g. space for the result is
1303 malloc'd and should be freed by the caller.
1305 A NULL return means end of file. */
1307 gdb_readline (prrompt
)
1312 int input_index
= 0;
1313 int result_size
= 80;
1317 /* Don't use a _filtered function here. It causes the assumed
1318 character position to be off, since the newline we read from
1319 the user is not accounted for. */
1320 fputs_unfiltered (prrompt
, gdb_stdout
);
1322 /* Move to a new line so the entered line doesn't have a prompt
1323 on the front of it. */
1324 fputs_unfiltered ("\n", gdb_stdout
);
1326 gdb_flush (gdb_stdout
);
1329 result
= (char *) xmalloc (result_size
);
1333 /* Read from stdin if we are executing a user defined command.
1334 This is the right thing for prompt_for_continue, at least. */
1335 c
= fgetc (instream
? instream
: stdin
);
1339 if (input_index
> 0)
1340 /* The last line does not end with a newline. Return it, and
1341 if we are called again fgetc will still return EOF and
1342 we'll return NULL then. */
1351 result
[input_index
++] = c
;
1352 while (input_index
>= result_size
)
1355 result
= (char *) xrealloc (result
, result_size
);
1359 result
[input_index
++] = '\0';
1363 /* Variables which control command line editing and history
1364 substitution. These variables are given default values at the end
1366 static int command_editing_p
;
1367 static int history_expansion_p
;
1368 static int write_history_p
;
1369 static int history_size
;
1370 static char *history_filename
;
1372 /* readline uses the word breaks for two things:
1373 (1) In figuring out where to point the TEXT parameter to the
1374 rl_completion_entry_function. Since we don't use TEXT for much,
1375 it doesn't matter a lot what the word breaks are for this purpose, but
1376 it does affect how much stuff M-? lists.
1377 (2) If one of the matches contains a word break character, readline
1378 will quote it. That's why we switch between
1379 gdb_completer_word_break_characters and
1380 gdb_completer_command_word_break_characters. I'm not sure when
1381 we need this behavior (perhaps for funky characters in C++ symbols?). */
1383 /* Variables which are necessary for fancy command line editing. */
1384 char *gdb_completer_word_break_characters
=
1385 " \t\n!@#$%^&*()+=|~`}{[]\"';:?/>.<,-";
1387 /* When completing on command names, we remove '-' from the list of
1388 word break characters, since we use it in command names. If the
1389 readline library sees one in any of the current completion strings,
1390 it thinks that the string needs to be quoted and automatically supplies
1392 char *gdb_completer_command_word_break_characters
=
1393 " \t\n!@#$%^&*()+=|~`}{[]\"';:?/>.<,";
1395 /* Characters that can be used to quote completion strings. Note that we
1396 can't include '"' because the gdb C parser treats such quoted sequences
1398 char *gdb_completer_quote_characters
=
1401 /* Functions that are used as part of the fancy command line editing. */
1403 /* This can be used for functions which don't want to complete on symbols
1404 but don't want to complete on anything else either. */
1407 noop_completer (text
, prefix
)
1414 /* Complete on filenames. */
1416 filename_completer (text
, word
)
1420 /* From readline. */
1421 extern char *filename_completion_function ();
1422 int subsequent_name
;
1424 int return_val_used
;
1425 int return_val_alloced
;
1427 return_val_used
= 0;
1428 /* Small for testing. */
1429 return_val_alloced
= 1;
1430 return_val
= (char **) xmalloc (return_val_alloced
* sizeof (char *));
1432 subsequent_name
= 0;
1436 p
= filename_completion_function (text
, subsequent_name
);
1437 if (return_val_used
>= return_val_alloced
)
1439 return_val_alloced
*= 2;
1441 (char **) xrealloc (return_val
,
1442 return_val_alloced
* sizeof (char *));
1446 return_val
[return_val_used
++] = p
;
1449 /* Like emacs, don't complete on old versions. Especially useful
1450 in the "source" command. */
1451 if (p
[strlen (p
) - 1] == '~')
1457 /* Return exactly p. */
1458 return_val
[return_val_used
++] = p
;
1459 else if (word
> text
)
1461 /* Return some portion of p. */
1462 q
= xmalloc (strlen (p
) + 5);
1463 strcpy (q
, p
+ (word
- text
));
1464 return_val
[return_val_used
++] = q
;
1469 /* Return some of TEXT plus p. */
1470 q
= xmalloc (strlen (p
) + (text
- word
) + 5);
1471 strncpy (q
, word
, text
- word
);
1472 q
[text
- word
] = '\0';
1474 return_val
[return_val_used
++] = q
;
1478 subsequent_name
= 1;
1481 /* There is no way to do this just long enough to affect quote inserting
1482 without also affecting the next completion. This should be fixed in
1484 /* Insure that readline does the right thing
1485 with respect to inserting quotes. */
1486 rl_completer_word_break_characters
= "";
1491 /* Here are some useful test cases for completion. FIXME: These should
1492 be put in the test suite. They should be tested with both M-? and TAB.
1494 "show output-" "radix"
1495 "show output" "-radix"
1496 "p" ambiguous (commands starting with p--path, print, printf, etc.)
1497 "p " ambiguous (all symbols)
1498 "info t foo" no completions
1499 "info t " no completions
1500 "info t" ambiguous ("info target", "info terminal", etc.)
1501 "info ajksdlfk" no completions
1502 "info ajksdlfk " no completions
1504 "info " ambiguous (all info commands)
1505 "p \"a" no completions (string constant)
1506 "p 'a" ambiguous (all symbols starting with a)
1507 "p b-a" ambiguous (all symbols starting with a)
1508 "p b-" ambiguous (all symbols)
1509 "file Make" "file" (word break hard to screw up here)
1510 "file ../gdb.stabs/we" "ird" (needs to not break word at slash)
1513 /* Generate completions one by one for the completer. Each time we are
1514 called return another potential completion to the caller.
1515 line_completion just completes on commands or passes the buck to the
1516 command's completer function, the stuff specific to symbol completion
1517 is in make_symbol_completion_list.
1519 TEXT is the caller's idea of the "word" we are looking at.
1521 MATCHES is the number of matches that have currently been collected from
1522 calling this completion function. When zero, then we need to initialize,
1523 otherwise the initialization has already taken place and we can just
1524 return the next potential completion string.
1526 LINE_BUFFER is available to be looked at; it contains the entire text
1527 of the line. POINT is the offset in that line of the cursor. You
1528 should pretend that the line ends at POINT.
1530 Returns NULL if there are no more completions, else a pointer to a string
1531 which is a possible completion, it is the caller's responsibility to
1535 line_completion_function (text
, matches
, line_buffer
, point
)
1541 static char **list
= (char **)NULL
; /* Cache of completions */
1542 static int index
; /* Next cached completion */
1543 char *output
= NULL
;
1544 char *tmp_command
, *p
;
1545 /* Pointer within tmp_command which corresponds to text. */
1547 struct cmd_list_element
*c
, *result_list
;
1551 /* The caller is beginning to accumulate a new set of completions, so
1552 we need to find all of them now, and cache them for returning one at
1553 a time on future calls. */
1557 /* Free the storage used by LIST, but not by the strings inside.
1558 This is because rl_complete_internal () frees the strings. */
1564 /* Choose the default set of word break characters to break completions.
1565 If we later find out that we are doing completions on command strings
1566 (as opposed to strings supplied by the individual command completer
1567 functions, which can be any string) then we will switch to the
1568 special word break set for command strings, which leaves out the
1569 '-' character used in some commands. */
1571 rl_completer_word_break_characters
=
1572 gdb_completer_word_break_characters
;
1574 /* Decide whether to complete on a list of gdb commands or on symbols. */
1575 tmp_command
= (char *) alloca (point
+ 1);
1578 strncpy (tmp_command
, line_buffer
, point
);
1579 tmp_command
[point
] = '\0';
1580 /* Since text always contains some number of characters leading up
1581 to point, we can find the equivalent position in tmp_command
1582 by subtracting that many characters from the end of tmp_command. */
1583 word
= tmp_command
+ point
- strlen (text
);
1587 /* An empty line we want to consider ambiguous; that is, it
1588 could be any command. */
1589 c
= (struct cmd_list_element
*) -1;
1594 c
= lookup_cmd_1 (&p
, cmdlist
, &result_list
, 1);
1597 /* Move p up to the next interesting thing. */
1598 while (*p
== ' ' || *p
== '\t')
1605 /* It is an unrecognized command. So there are no
1606 possible completions. */
1609 else if (c
== (struct cmd_list_element
*) -1)
1613 /* lookup_cmd_1 advances p up to the first ambiguous thing, but
1614 doesn't advance over that thing itself. Do so now. */
1616 while (*q
&& (isalnum (*q
) || *q
== '-' || *q
== '_'))
1618 if (q
!= tmp_command
+ point
)
1620 /* There is something beyond the ambiguous
1621 command, so there are no possible completions. For
1622 example, "info t " or "info t foo" does not complete
1623 to anything, because "info t" can be "info target" or
1629 /* We're trying to complete on the command which was ambiguous.
1630 This we can deal with. */
1633 list
= complete_on_cmdlist (*result_list
->prefixlist
, p
,
1638 list
= complete_on_cmdlist (cmdlist
, p
, word
);
1640 /* Insure that readline does the right thing with respect to
1641 inserting quotes. */
1642 rl_completer_word_break_characters
=
1643 gdb_completer_command_word_break_characters
;
1648 /* We've recognized a full command. */
1650 if (p
== tmp_command
+ point
)
1652 /* There is no non-whitespace in the line beyond the command. */
1654 if (p
[-1] == ' ' || p
[-1] == '\t')
1656 /* The command is followed by whitespace; we need to complete
1657 on whatever comes after command. */
1660 /* It is a prefix command; what comes after it is
1661 a subcommand (e.g. "info "). */
1662 list
= complete_on_cmdlist (*c
->prefixlist
, p
, word
);
1664 /* Insure that readline does the right thing
1665 with respect to inserting quotes. */
1666 rl_completer_word_break_characters
=
1667 gdb_completer_command_word_break_characters
;
1671 list
= complete_on_enum (c
->enums
, p
, word
);
1672 rl_completer_word_break_characters
=
1673 gdb_completer_command_word_break_characters
;
1677 /* It is a normal command; what comes after it is
1678 completed by the command's completer function. */
1679 list
= (*c
->completer
) (p
, word
);
1684 /* The command is not followed by whitespace; we need to
1685 complete on the command itself. e.g. "p" which is a
1686 command itself but also can complete to "print", "ptype"
1690 /* Find the command we are completing on. */
1692 while (q
> tmp_command
)
1694 if (isalnum (q
[-1]) || q
[-1] == '-' || q
[-1] == '_')
1700 list
= complete_on_cmdlist (result_list
, q
, word
);
1702 /* Insure that readline does the right thing
1703 with respect to inserting quotes. */
1704 rl_completer_word_break_characters
=
1705 gdb_completer_command_word_break_characters
;
1710 /* There is non-whitespace beyond the command. */
1712 if (c
->prefixlist
&& !c
->allow_unknown
)
1714 /* It is an unrecognized subcommand of a prefix command,
1715 e.g. "info adsfkdj". */
1720 list
= complete_on_enum (c
->enums
, p
, word
);
1724 /* It is a normal command. */
1725 list
= (*c
->completer
) (p
, word
);
1731 /* If we found a list of potential completions during initialization then
1732 dole them out one at a time. The vector of completions is NULL
1733 terminated, so after returning the last one, return NULL (and continue
1734 to do so) each time we are called after that, until a new list is
1739 output
= list
[index
];
1747 /* Can't do this because readline hasn't yet checked the word breaks
1748 for figuring out whether to insert a quote. */
1750 /* Make sure the word break characters are set back to normal for the
1751 next time that readline tries to complete something. */
1752 rl_completer_word_break_characters
=
1753 gdb_completer_word_break_characters
;
1759 /* Line completion interface function for readline. */
1762 readline_line_completion_function (text
, matches
)
1766 return line_completion_function (text
, matches
, rl_line_buffer
, rl_point
);
1769 /* Skip over a possibly quoted word (as defined by the quote characters
1770 and word break characters the completer uses). Returns pointer to the
1771 location after the "word". */
1777 char quote_char
= '\0';
1780 for (scan
= str
; *scan
!= '\0'; scan
++)
1782 if (quote_char
!= '\0')
1784 /* Ignore everything until the matching close quote char */
1785 if (*scan
== quote_char
)
1787 /* Found matching close quote. */
1792 else if (strchr (gdb_completer_quote_characters
, *scan
))
1794 /* Found start of a quoted string. */
1797 else if (strchr (gdb_completer_word_break_characters
, *scan
))
1811 #if STOP_SIGNAL == SIGTSTP
1812 signal (SIGTSTP
, SIG_DFL
);
1814 kill (getpid (), SIGTSTP
);
1815 signal (SIGTSTP
, stop_sig
);
1817 signal (STOP_SIGNAL
, stop_sig
);
1819 printf_unfiltered ("%s", prompt
);
1820 gdb_flush (gdb_stdout
);
1822 /* Forget about any previous command -- null line now will do nothing. */
1825 #endif /* STOP_SIGNAL */
1827 /* Initialize signal handlers. */
1837 signal (SIGINT
, request_quit
);
1839 /* If we initialize SIGQUIT to SIG_IGN, then the SIG_IGN will get
1840 passed to the inferior, which we don't want. It would be
1841 possible to do a "signal (SIGQUIT, SIG_DFL)" after we fork, but
1842 on BSD4.3 systems using vfork, that can affect the
1843 GDB process as well as the inferior (the signal handling tables
1844 might be in memory, shared between the two). Since we establish
1845 a handler for SIGQUIT, when we call exec it will set the signal
1846 to SIG_DFL for us. */
1847 signal (SIGQUIT
, do_nothing
);
1848 if (signal (SIGHUP
, do_nothing
) != SIG_IGN
)
1849 signal (SIGHUP
, disconnect
);
1850 signal (SIGFPE
, float_handler
);
1852 #if defined(SIGWINCH) && defined(SIGWINCH_HANDLER)
1853 signal (SIGWINCH
, SIGWINCH_HANDLER
);
1857 /* Read one line from the command input stream `instream'
1858 into the local static buffer `linebuffer' (whose current length
1860 The buffer is made bigger as necessary.
1861 Returns the address of the start of the line.
1863 NULL is returned for end of file.
1865 *If* the instream == stdin & stdin is a terminal, the line read
1866 is copied into the file line saver (global var char *line,
1867 length linesize) so that it can be duplicated.
1869 This routine either uses fancy command line editing or
1870 simple input as the user has requested. */
1873 command_line_input (prrompt
, repeat
, annotation_suffix
)
1876 char *annotation_suffix
;
1878 static char *linebuffer
= 0;
1879 static unsigned linelength
= 0;
1883 char *local_prompt
= prrompt
;
1888 /* The annotation suffix must be non-NULL. */
1889 if (annotation_suffix
== NULL
)
1890 annotation_suffix
= "";
1892 if (annotation_level
> 1 && instream
== stdin
)
1894 local_prompt
= alloca ((prrompt
== NULL
? 0 : strlen (prrompt
))
1895 + strlen (annotation_suffix
) + 40);
1896 if (prrompt
== NULL
)
1897 local_prompt
[0] = '\0';
1899 strcpy (local_prompt
, prrompt
);
1900 strcat (local_prompt
, "\n\032\032");
1901 strcat (local_prompt
, annotation_suffix
);
1902 strcat (local_prompt
, "\n");
1905 if (linebuffer
== 0)
1908 linebuffer
= (char *) xmalloc (linelength
);
1913 /* Control-C quits instantly if typed while in this loop
1914 since it should not wait until the user types a newline. */
1918 signal (STOP_SIGNAL
, stop_sig
);
1923 /* Make sure that all output has been output. Some machines may let
1924 you get away with leaving out some of the gdb_flush, but not all. */
1926 gdb_flush (gdb_stdout
);
1927 gdb_flush (gdb_stderr
);
1929 if (source_file_name
!= NULL
)
1931 ++source_line_number
;
1932 sprintf (source_error
,
1933 "%s%s:%d: Error in sourced command file:\n",
1936 source_line_number
);
1937 error_pre_print
= source_error
;
1940 if (annotation_level
> 1 && instream
== stdin
)
1942 printf_unfiltered ("\n\032\032pre-");
1943 printf_unfiltered (annotation_suffix
);
1944 printf_unfiltered ("\n");
1947 /* Don't use fancy stuff if not talking to stdin. */
1948 if (command_editing_p
&& instream
== stdin
1949 && ISATTY (instream
))
1950 rl
= readline (local_prompt
);
1952 rl
= gdb_readline (local_prompt
);
1954 if (annotation_level
> 1 && instream
== stdin
)
1956 printf_unfiltered ("\n\032\032post-");
1957 printf_unfiltered (annotation_suffix
);
1958 printf_unfiltered ("\n");
1961 if (!rl
|| rl
== (char *) EOF
)
1966 if (strlen(rl
) + 1 + (p
- linebuffer
) > linelength
)
1968 linelength
= strlen(rl
) + 1 + (p
- linebuffer
);
1969 nline
= (char *) xrealloc (linebuffer
, linelength
);
1970 p
+= nline
- linebuffer
;
1974 /* Copy line. Don't copy null at end. (Leaves line alone
1975 if this was just a newline) */
1979 free (rl
); /* Allocated in readline. */
1981 if (p
== linebuffer
|| *(p
- 1) != '\\')
1984 p
--; /* Put on top of '\'. */
1985 local_prompt
= (char *) 0;
1990 signal (STOP_SIGNAL
, SIG_DFL
);
1997 #define SERVER_COMMAND_LENGTH 7
1999 (p
- linebuffer
> SERVER_COMMAND_LENGTH
)
2000 && STREQN (linebuffer
, "server ", SERVER_COMMAND_LENGTH
);
2003 /* Note that we don't set `line'. Between this and the check in
2004 dont_repeat, this insures that repeating will still do the
2007 return linebuffer
+ SERVER_COMMAND_LENGTH
;
2010 /* Do history expansion if that is wished. */
2011 if (history_expansion_p
&& instream
== stdin
2012 && ISATTY (instream
))
2014 char *history_value
;
2017 *p
= '\0'; /* Insert null now. */
2018 expanded
= history_expand (linebuffer
, &history_value
);
2021 /* Print the changes. */
2022 printf_unfiltered ("%s\n", history_value
);
2024 /* If there was an error, call this function again. */
2027 free (history_value
);
2028 return command_line_input (prrompt
, repeat
, annotation_suffix
);
2030 if (strlen (history_value
) > linelength
)
2032 linelength
= strlen (history_value
) + 1;
2033 linebuffer
= (char *) xrealloc (linebuffer
, linelength
);
2035 strcpy (linebuffer
, history_value
);
2036 p
= linebuffer
+ strlen(linebuffer
);
2037 free (history_value
);
2041 /* If we just got an empty line, and that is supposed
2042 to repeat the previous command, return the value in the
2046 if (p
== linebuffer
)
2049 while (*p1
== ' ' || *p1
== '\t')
2057 /* Add line to history if appropriate. */
2058 if (instream
== stdin
2059 && ISATTY (stdin
) && *linebuffer
)
2060 add_history (linebuffer
);
2062 /* Note: lines consisting solely of comments are added to the command
2063 history. This is useful when you type a command, and then
2064 realize you don't want to execute it quite yet. You can comment
2065 out the command and then later fetch it from the value history
2066 and remove the '#'. The kill ring is probably better, but some
2067 people are in the habit of commenting things out. */
2069 while ((c
= *p1
++) != '\0')
2072 while ((c
= *p1
++) != '"')
2074 /* Make sure an escaped '"' doesn't make us think the string
2082 while ((c
= *p1
++) != '\'')
2084 /* Make sure an escaped '\'' doesn't make us think the string
2093 /* Found a comment. */
2099 /* Save into global buffer if appropriate. */
2102 if (linelength
> linesize
)
2104 line
= xrealloc (line
, linelength
);
2105 linesize
= linelength
;
2107 strcpy (line
, linebuffer
);
2115 /* Expand the body_list of COMMAND so that it can hold NEW_LENGTH
2116 code bodies. This is typically used when we encounter an "else"
2117 clause for an "if" command. */
2120 realloc_body_list (command
, new_length
)
2121 struct command_line
*command
;
2125 struct command_line
**body_list
;
2127 n
= command
->body_count
;
2129 /* Nothing to do? */
2130 if (new_length
<= n
)
2133 body_list
= (struct command_line
**)
2134 xmalloc (sizeof (struct command_line
*) * new_length
);
2136 memcpy (body_list
, command
->body_list
, sizeof (struct command_line
*) * n
);
2138 free (command
->body_list
);
2139 command
->body_list
= body_list
;
2140 command
->body_count
= new_length
;
2143 /* Read one line from the input stream. If the command is an "else" or
2144 "end", return such an indication to the caller. */
2146 static enum misc_command_type
2147 read_next_line (command
)
2148 struct command_line
**command
;
2150 char *p
, *p1
, *prompt_ptr
, control_prompt
[256];
2153 if (control_level
>= 254)
2154 error ("Control nesting too deep!\n");
2156 /* Set a prompt based on the nesting of the control commands. */
2157 if (instream
== stdin
)
2159 for (i
= 0; i
< control_level
; i
++)
2160 control_prompt
[i
] = ' ';
2161 control_prompt
[i
] = '>';
2162 control_prompt
[i
+1] = '\0';
2163 prompt_ptr
= (char *)&control_prompt
[0];
2168 p
= command_line_input (prompt_ptr
, instream
== stdin
, "commands");
2170 /* Not sure what to do here. */
2174 /* Strip leading and trailing whitespace. */
2175 while (*p
== ' ' || *p
== '\t')
2178 p1
= p
+ strlen (p
);
2179 while (p1
!= p
&& (p1
[-1] == ' ' || p1
[-1] == '\t'))
2182 /* Blanks and comments don't really do anything, but we need to
2183 distinguish them from else, end and other commands which can be
2185 if (p1
== p
|| p
[0] == '#')
2188 /* Is this the end of a simple, while, or if control structure? */
2189 if (p1
- p
== 3 && !strncmp (p
, "end", 3))
2192 /* Is the else clause of an if control structure? */
2193 if (p1
- p
== 4 && !strncmp (p
, "else", 4))
2194 return else_command
;
2196 /* Check for while, if, break, continue, etc and build a new command
2197 line structure for them. */
2198 if (p1
- p
> 5 && !strncmp (p
, "while", 5))
2199 *command
= build_command_line (while_control
, p
+ 6);
2200 else if (p1
- p
> 2 && !strncmp (p
, "if", 2))
2201 *command
= build_command_line (if_control
, p
+ 3);
2202 else if (p1
- p
== 5 && !strncmp (p
, "loop_break", 5))
2204 *command
= (struct command_line
*)
2205 xmalloc (sizeof (struct command_line
));
2206 (*command
)->next
= NULL
;
2207 (*command
)->line
= NULL
;
2208 (*command
)->control_type
= break_control
;
2209 (*command
)->body_count
= 0;
2210 (*command
)->body_list
= NULL
;
2212 else if (p1
- p
== 8 && !strncmp (p
, "loop_continue", 8))
2214 *command
= (struct command_line
*)
2215 xmalloc (sizeof (struct command_line
));
2216 (*command
)->next
= NULL
;
2217 (*command
)->line
= NULL
;
2218 (*command
)->control_type
= continue_control
;
2219 (*command
)->body_count
= 0;
2220 (*command
)->body_list
= NULL
;
2224 /* A normal command. */
2225 *command
= (struct command_line
*)
2226 xmalloc (sizeof (struct command_line
));
2227 (*command
)->next
= NULL
;
2228 (*command
)->line
= savestring (p
, p1
- p
);
2229 (*command
)->control_type
= simple_control
;
2230 (*command
)->body_count
= 0;
2231 (*command
)->body_list
= NULL
;
2234 /* Nothing special. */
2238 /* Recursively read in the control structures and create a command_line
2241 The parent_control parameter is the control structure in which the
2242 following commands are nested. */
2244 static enum command_control_type
2245 recurse_read_control_structure (current_cmd
)
2246 struct command_line
*current_cmd
;
2248 int current_body
, i
;
2249 enum misc_command_type val
;
2250 enum command_control_type ret
;
2251 struct command_line
**body_ptr
, *child_tail
, *next
;
2252 struct cleanup
*old_chains
, *tmp_chains
;
2258 /* Sanity checks. */
2259 if (current_cmd
->control_type
== simple_control
)
2261 error ("Recursed on a simple control type\n");
2262 return invalid_control
;
2265 if (current_body
> current_cmd
->body_count
)
2267 error ("Allocated body is smaller than this command type needs\n");
2268 return invalid_control
;
2271 /* Read lines from the input stream and build control structures. */
2277 val
= read_next_line (&next
);
2279 /* Just skip blanks and comments. */
2280 if (val
== nop_command
)
2283 if (val
== end_command
)
2285 if (current_cmd
->control_type
== while_control
2286 || current_cmd
->control_type
== if_control
)
2288 /* Success reading an entire control structure. */
2289 ret
= simple_control
;
2294 ret
= invalid_control
;
2299 /* Not the end of a control structure. */
2300 if (val
== else_command
)
2302 if (current_cmd
->control_type
== if_control
2303 && current_body
== 1)
2305 realloc_body_list (current_cmd
, 2);
2312 ret
= invalid_control
;
2319 child_tail
->next
= next
;
2323 /* We have just read the first line of the child's control
2324 structure. From now on, arrange to throw away the line
2325 we have if we quit or get an error. */
2326 body_ptr
= current_cmd
->body_list
;
2327 for (i
= 1; i
< current_body
; i
++)
2332 tmp_chains
= make_cleanup (free_command_lines
, body_ptr
);
2335 old_chains
= tmp_chains
;
2340 /* If the latest line is another control structure, then recurse
2342 if (next
->control_type
== while_control
2343 || next
->control_type
== if_control
)
2346 ret
= recurse_read_control_structure (next
);
2349 if (ret
!= simple_control
)
2355 if (ret
== invalid_control
&& old_chains
)
2356 do_cleanups (old_chains
);
2357 else if (old_chains
)
2358 discard_cleanups (old_chains
);
2364 /* Read lines from the input stream
2365 and accumulate them in a chain of struct command_line's
2366 which is then returned. */
2368 struct command_line
*
2369 read_command_lines ()
2371 struct command_line
*head
, *tail
, *next
;
2372 struct cleanup
*old_chain
;
2373 enum command_control_type ret
;
2374 enum misc_command_type val
;
2381 val
= read_next_line (&next
);
2383 /* Ignore blank lines or comments. */
2384 if (val
== nop_command
)
2387 if (val
== end_command
)
2389 ret
= simple_control
;
2393 if (val
!= ok_command
)
2395 ret
= invalid_control
;
2399 if (next
->control_type
== while_control
2400 || next
->control_type
== if_control
)
2403 ret
= recurse_read_control_structure (next
);
2406 if (ret
== invalid_control
)
2417 old_chain
= make_cleanup (free_command_lines
, &head
);
2426 if (ret
!= invalid_control
)
2428 discard_cleanups (old_chain
);
2432 do_cleanups (old_chain
);
2438 /* Free a chain of struct command_line's. */
2441 free_command_lines (lptr
)
2442 struct command_line
**lptr
;
2444 register struct command_line
*l
= *lptr
;
2445 register struct command_line
*next
;
2446 struct command_line
**blist
;
2451 if (l
->body_count
> 0)
2453 blist
= l
->body_list
;
2454 for (i
= 0; i
< l
->body_count
; i
++, blist
++)
2455 free_command_lines (blist
);
2464 /* Add an element to the list of info subcommands. */
2467 add_info (name
, fun
, doc
)
2469 void (*fun
) PARAMS ((char *, int));
2472 add_cmd (name
, no_class
, fun
, doc
, &infolist
);
2475 /* Add an alias to the list of info subcommands. */
2478 add_info_alias (name
, oldname
, abbrev_flag
)
2483 add_alias_cmd (name
, oldname
, 0, abbrev_flag
, &infolist
);
2486 /* The "info" command is defined as a prefix, with allow_unknown = 0.
2487 Therefore, its own definition is called only for "info" with no args. */
2491 info_command (arg
, from_tty
)
2495 printf_unfiltered ("\"info\" must be followed by the name of an info command.\n");
2496 help_list (infolist
, "info ", -1, gdb_stdout
);
2499 /* The "complete" command is used by Emacs to implement completion. */
2503 complete_command (arg
, from_tty
)
2515 argpoint
= strlen (arg
);
2517 for (completion
= line_completion_function (arg
, i
= 0, arg
, argpoint
);
2519 completion
= line_completion_function (arg
, ++i
, arg
, argpoint
))
2521 printf_unfiltered ("%s\n", completion
);
2526 /* The "show" command with no arguments shows all the settings. */
2530 show_command (arg
, from_tty
)
2534 cmd_show_list (showlist
, from_tty
, "");
2537 /* Add an element to the list of commands. */
2540 add_com (name
, class, fun
, doc
)
2542 enum command_class
class;
2543 void (*fun
) PARAMS ((char *, int));
2546 add_cmd (name
, class, fun
, doc
, &cmdlist
);
2549 /* Add an alias or abbreviation command to the list of commands. */
2552 add_com_alias (name
, oldname
, class, abbrev_flag
)
2555 enum command_class
class;
2558 add_alias_cmd (name
, oldname
, class, abbrev_flag
, &cmdlist
);
2565 error ("Argument required (%s).", why
);
2570 help_command (command
, from_tty
)
2572 int from_tty
; /* Ignored */
2574 help_cmd (command
, gdb_stdout
);
2578 validate_comname (comname
)
2584 error_no_arg ("name of command to define");
2589 if (!isalnum(*p
) && *p
!= '-' && *p
!= '_')
2590 error ("Junk in argument list: \"%s\"", p
);
2595 /* This is just a placeholder in the command data structures. */
2597 user_defined_command (ignore
, from_tty
)
2604 define_command (comname
, from_tty
)
2608 register struct command_line
*cmds
;
2609 register struct cmd_list_element
*c
, *newc
, *hookc
= 0;
2610 char *tem
= comname
;
2611 #define HOOK_STRING "hook-"
2614 validate_comname (comname
);
2616 /* Look it up, and verify that we got an exact match. */
2617 c
= lookup_cmd (&tem
, cmdlist
, "", -1, 1);
2618 if (c
&& !STREQ (comname
, c
->name
))
2623 if (c
->class == class_user
|| c
->class == class_alias
)
2624 tem
= "Redefine command \"%s\"? ";
2626 tem
= "Really redefine built-in command \"%s\"? ";
2627 if (!query (tem
, c
->name
))
2628 error ("Command \"%s\" not redefined.", c
->name
);
2631 /* If this new command is a hook, then mark the command which it
2632 is hooking. Note that we allow hooking `help' commands, so that
2633 we can hook the `stop' pseudo-command. */
2635 if (!strncmp (comname
, HOOK_STRING
, HOOK_LEN
))
2637 /* Look up cmd it hooks, and verify that we got an exact match. */
2638 tem
= comname
+HOOK_LEN
;
2639 hookc
= lookup_cmd (&tem
, cmdlist
, "", -1, 0);
2640 if (hookc
&& !STREQ (comname
+HOOK_LEN
, hookc
->name
))
2644 warning ("Your new `%s' command does not hook any existing command.",
2646 if (!query ("Proceed? "))
2647 error ("Not confirmed.");
2651 comname
= savestring (comname
, strlen (comname
));
2653 /* If the rest of the commands will be case insensitive, this one
2654 should behave in the same manner. */
2655 for (tem
= comname
; *tem
; tem
++)
2656 if (isupper(*tem
)) *tem
= tolower(*tem
);
2660 printf_unfiltered ("Type commands for definition of \"%s\".\n\
2661 End with a line saying just \"end\".\n", comname
);
2662 gdb_flush (gdb_stdout
);
2666 cmds
= read_command_lines ();
2668 if (c
&& c
->class == class_user
)
2669 free_command_lines (&c
->user_commands
);
2671 newc
= add_cmd (comname
, class_user
, user_defined_command
,
2672 (c
&& c
->class == class_user
)
2673 ? c
->doc
: savestring ("User-defined.", 13), &cmdlist
);
2674 newc
->user_commands
= cmds
;
2676 /* If this new command is a hook, then mark both commands as being
2680 hookc
->hook
= newc
; /* Target gets hooked. */
2681 newc
->hookee
= hookc
; /* We are marked as hooking target cmd. */
2686 document_command (comname
, from_tty
)
2690 struct command_line
*doclines
;
2691 register struct cmd_list_element
*c
;
2692 char *tem
= comname
;
2694 validate_comname (comname
);
2696 c
= lookup_cmd (&tem
, cmdlist
, "", 0, 1);
2698 if (c
->class != class_user
)
2699 error ("Command \"%s\" is built-in.", comname
);
2702 printf_unfiltered ("Type documentation for \"%s\".\n\
2703 End with a line saying just \"end\".\n", comname
);
2705 doclines
= read_command_lines ();
2707 if (c
->doc
) free (c
->doc
);
2710 register struct command_line
*cl1
;
2711 register int len
= 0;
2713 for (cl1
= doclines
; cl1
; cl1
= cl1
->next
)
2714 len
+= strlen (cl1
->line
) + 1;
2716 c
->doc
= (char *) xmalloc (len
+ 1);
2719 for (cl1
= doclines
; cl1
; cl1
= cl1
->next
)
2721 strcat (c
->doc
, cl1
->line
);
2723 strcat (c
->doc
, "\n");
2727 free_command_lines (&doclines
);
2731 print_gnu_advertisement ()
2733 printf_unfiltered ("\
2734 GDB is free software and you are welcome to distribute copies of it\n\
2735 under certain conditions; type \"show copying\" to see the conditions.\n\
2736 There is absolutely no warranty for GDB; type \"show warranty\" for details.\n\
2741 print_gdb_version (stream
)
2744 fprintf_filtered (stream
, "\
2745 GDB %s (%s", version
, host_name
);
2747 if (!STREQ (host_name
, target_name
))
2748 fprintf_filtered (stream
, " --target %s", target_name
);
2750 fprintf_filtered (stream
, "), ");
2752 fprintf_filtered (stream
, "Copyright 1995 Free Software Foundation, Inc.");
2757 show_version (args
, from_tty
)
2762 print_gnu_advertisement ();
2763 print_gdb_version (gdb_stdout
);
2764 printf_filtered ("\n");
2768 /* xgdb calls this to reprint the usual GDB prompt. Obsolete now that xgdb
2774 printf_unfiltered ("%s", prompt
);
2775 gdb_flush (gdb_stdout
);
2779 quit_command (args
, from_tty
)
2785 /* An optional expression may be used to cause gdb to terminate with the
2786 value of that expression. */
2789 value_ptr val
= parse_and_eval (args
);
2791 exit_code
= (int) value_as_long (val
);
2794 if (inferior_pid
!= 0 && target_has_execution
)
2798 if (query ("The program is running. Quit anyway (and detach it)? "))
2799 target_detach (args
, from_tty
);
2801 error ("Not confirmed.");
2805 if (query ("The program is running. Quit anyway (and kill it)? "))
2808 error ("Not confirmed.");
2811 /* UDI wants this, to kill the TIP. */
2814 /* Save the history information if it is appropriate to do so. */
2815 if (write_history_p
&& history_filename
)
2816 write_history (history_filename
);
2821 /* Returns whether GDB is running on a terminal and whether the user
2822 desires that questions be asked of them on that terminal. */
2825 input_from_terminal_p ()
2827 return gdb_has_a_terminal () && (instream
== stdin
) & caution
;
2832 pwd_command (args
, from_tty
)
2836 if (args
) error ("The \"pwd\" command does not take an argument: %s", args
);
2837 getcwd (gdb_dirbuf
, sizeof (gdb_dirbuf
));
2839 if (!STREQ (gdb_dirbuf
, current_directory
))
2840 printf_unfiltered ("Working directory %s\n (canonically %s).\n",
2841 current_directory
, gdb_dirbuf
);
2843 printf_unfiltered ("Working directory %s.\n", current_directory
);
2847 cd_command (dir
, from_tty
)
2852 /* Found something other than leading repetitions of "/..". */
2853 int found_real_path
;
2856 /* If the new directory is absolute, repeat is a no-op; if relative,
2857 repeat might be useful but is more likely to be a mistake. */
2861 error_no_arg ("new working directory");
2863 dir
= tilde_expand (dir
);
2864 make_cleanup (free
, dir
);
2866 if (chdir (dir
) < 0)
2867 perror_with_name (dir
);
2870 dir
= savestring (dir
, len
- (len
> 1 && SLASH_P(dir
[len
-1])));
2872 current_directory
= dir
;
2875 if (SLASH_P (current_directory
[0]) && current_directory
[1] == '\0')
2876 current_directory
= concat (current_directory
, dir
, NULL
);
2878 current_directory
= concat (current_directory
, SLASH_STRING
, dir
, NULL
);
2882 /* Now simplify any occurrences of `.' and `..' in the pathname. */
2884 found_real_path
= 0;
2885 for (p
= current_directory
; *p
;)
2887 if (SLASH_P (p
[0]) && p
[1] == '.' && (p
[2] == 0 || SLASH_P (p
[2])))
2889 else if (SLASH_P (p
[0]) && p
[1] == '.' && p
[2] == '.'
2890 && (p
[3] == 0 || SLASH_P (p
[3])))
2892 if (found_real_path
)
2894 /* Search backwards for the directory just before the "/.."
2895 and obliterate it and the "/..". */
2897 while (q
!= current_directory
&& ! SLASH_P (q
[-1]))
2900 if (q
== current_directory
)
2901 /* current_directory is
2902 a relative pathname ("can't happen"--leave it alone). */
2906 strcpy (q
- 1, p
+ 3);
2911 /* We are dealing with leading repetitions of "/..", for example
2912 "/../..", which is the Mach super-root. */
2917 found_real_path
= 1;
2922 forget_cached_source_info ();
2925 pwd_command ((char *) 0, 1);
2928 struct source_cleanup_lines_args
{
2931 char *old_pre_error
;
2932 char *old_error_pre_print
;
2936 source_cleanup_lines (args
)
2939 struct source_cleanup_lines_args
*p
=
2940 (struct source_cleanup_lines_args
*)args
;
2941 source_line_number
= p
->old_line
;
2942 source_file_name
= p
->old_file
;
2943 source_pre_error
= p
->old_pre_error
;
2944 error_pre_print
= p
->old_error_pre_print
;
2949 source_command (args
, from_tty
)
2954 struct cleanup
*old_cleanups
;
2956 struct source_cleanup_lines_args old_lines
;
2961 error ("source command requires pathname of file to source.");
2964 file
= tilde_expand (file
);
2965 old_cleanups
= make_cleanup (free
, file
);
2967 stream
= fopen (file
, FOPEN_RT
);
2969 perror_with_name (file
);
2971 make_cleanup (fclose
, stream
);
2973 old_lines
.old_line
= source_line_number
;
2974 old_lines
.old_file
= source_file_name
;
2975 old_lines
.old_pre_error
= source_pre_error
;
2976 old_lines
.old_error_pre_print
= error_pre_print
;
2977 make_cleanup (source_cleanup_lines
, &old_lines
);
2978 source_line_number
= 0;
2979 source_file_name
= file
;
2980 source_pre_error
= error_pre_print
== NULL
? "" : error_pre_print
;
2981 source_pre_error
= savestring (source_pre_error
, strlen (source_pre_error
));
2982 make_cleanup (free
, source_pre_error
);
2983 /* This will get set every time we read a line. So it won't stay "" for
2985 error_pre_print
= "";
2987 needed_length
= strlen (source_file_name
) + strlen (source_pre_error
) + 80;
2988 if (source_error_allocated
< needed_length
)
2990 source_error_allocated
*= 2;
2991 if (source_error_allocated
< needed_length
)
2992 source_error_allocated
= needed_length
;
2993 if (source_error
== NULL
)
2994 source_error
= xmalloc (source_error_allocated
);
2996 source_error
= xrealloc (source_error
, source_error_allocated
);
2999 read_command_file (stream
);
3001 do_cleanups (old_cleanups
);
3006 echo_command (text
, from_tty
)
3014 while ((c
= *p
++) != '\0')
3018 /* \ at end of argument is used after spaces
3019 so they won't be lost. */
3023 c
= parse_escape (&p
);
3025 printf_filtered ("%c", c
);
3028 printf_filtered ("%c", c
);
3031 /* Force this output to appear now. */
3033 gdb_flush (gdb_stdout
);
3037 #ifdef TARGET_BYTE_ORDER_SELECTABLE
3039 /* Functions to manipulate the endianness of the target. */
3041 #ifndef TARGET_BYTE_ORDER_DEFAULT
3042 #define TARGET_BYTE_ORDER_DEFAULT BIG_ENDIAN
3045 int target_byte_order
= TARGET_BYTE_ORDER_DEFAULT
;
3047 static int target_byte_order_auto
= 1;
3049 /* Called if the user enters ``set endian'' without an argument. */
3051 set_endian (args
, from_tty
)
3055 printf_unfiltered ("\"set endian\" must be followed by \"auto\", \"big\" or \"little\".\n");
3056 show_endian (args
, from_tty
);
3059 /* Called by ``set endian big''. */
3061 set_endian_big (args
, from_tty
)
3065 target_byte_order
= BIG_ENDIAN
;
3066 target_byte_order_auto
= 0;
3069 /* Called by ``set endian little''. */
3071 set_endian_little (args
, from_tty
)
3075 target_byte_order
= LITTLE_ENDIAN
;
3076 target_byte_order_auto
= 0;
3079 /* Called by ``set endian auto''. */
3081 set_endian_auto (args
, from_tty
)
3085 target_byte_order_auto
= 1;
3088 /* Called by ``show endian''. */
3090 show_endian (args
, from_tty
)
3095 (target_byte_order_auto
3096 ? "The target endianness is set automatically (currently %s endian)\n"
3097 : "The target is assumed to be %s endian\n");
3098 printf_unfiltered ((char *) msg
, TARGET_BYTE_ORDER
== BIG_ENDIAN
? "big" : "little");
3101 #endif /* defined (TARGET_BYTE_ORDER_SELECTABLE) */
3103 /* Set the endianness from a BFD. */
3105 set_endian_from_file (abfd
)
3108 #ifdef TARGET_BYTE_ORDER_SELECTABLE
3111 if (abfd
->xvec
->byteorder_big_p
)
3114 want
= LITTLE_ENDIAN
;
3115 if (target_byte_order_auto
)
3116 target_byte_order
= want
;
3117 else if (target_byte_order
!= want
)
3118 warning ("%s endian file does not match %s endian target.",
3119 want
== BIG_ENDIAN
? "big" : "little",
3120 TARGET_BYTE_ORDER
== BIG_ENDIAN
? "big" : "little");
3122 #else /* ! defined (TARGET_BYTE_ORDER_SELECTABLE) */
3124 if (abfd
->xvec
->byteorder_big_p
3125 ? TARGET_BYTE_ORDER
!= BIG_ENDIAN
3126 : TARGET_BYTE_ORDER
== BIG_ENDIAN
)
3127 warning ("%s endian file does not match %s endian target.",
3128 abfd
->xvec
->byteorder_big_p
? "big" : "little",
3129 TARGET_BYTE_ORDER
== BIG_ENDIAN
? "big" : "little");
3131 #endif /* ! defined (TARGET_BYTE_ORDER_SELECTABLE) */
3134 /* Functions to manipulate command line editing control variables. */
3136 /* Number of commands to print in each call to show_commands. */
3137 #define Hist_print 10
3139 show_commands (args
, from_tty
)
3143 /* Index for history commands. Relative to history_base. */
3146 /* Number of the history entry which we are planning to display next.
3147 Relative to history_base. */
3150 /* The first command in the history which doesn't exist (i.e. one more
3151 than the number of the last command). Relative to history_base. */
3154 extern HIST_ENTRY
*history_get
PARAMS ((int));
3156 /* Print out some of the commands from the command history. */
3157 /* First determine the length of the history list. */
3158 hist_len
= history_size
;
3159 for (offset
= 0; offset
< history_size
; offset
++)
3161 if (!history_get (history_base
+ offset
))
3170 if (args
[0] == '+' && args
[1] == '\0')
3171 /* "info editing +" should print from the stored position. */
3174 /* "info editing <exp>" should print around command number <exp>. */
3175 num
= (parse_and_eval_address (args
) - history_base
) - Hist_print
/ 2;
3177 /* "show commands" means print the last Hist_print commands. */
3180 num
= hist_len
- Hist_print
;
3186 /* If there are at least Hist_print commands, we want to display the last
3187 Hist_print rather than, say, the last 6. */
3188 if (hist_len
- num
< Hist_print
)
3190 num
= hist_len
- Hist_print
;
3195 for (offset
= num
; offset
< num
+ Hist_print
&& offset
< hist_len
; offset
++)
3197 printf_filtered ("%5d %s\n", history_base
+ offset
,
3198 (history_get (history_base
+ offset
))->line
);
3201 /* The next command we want to display is the next one that we haven't
3205 /* If the user repeats this command with return, it should do what
3206 "show commands +" does. This is unnecessary if arg is null,
3207 because "show commands +" is not useful after "show commands". */
3208 if (from_tty
&& args
)
3215 /* Called by do_setshow_command. */
3218 set_history_size_command (args
, from_tty
, c
)
3221 struct cmd_list_element
*c
;
3223 if (history_size
== INT_MAX
)
3224 unstifle_history ();
3225 else if (history_size
>= 0)
3226 stifle_history (history_size
);
3229 history_size
= INT_MAX
;
3230 error ("History size must be non-negative");
3236 set_history (args
, from_tty
)
3240 printf_unfiltered ("\"set history\" must be followed by the name of a history subcommand.\n");
3241 help_list (sethistlist
, "set history ", -1, gdb_stdout
);
3246 show_history (args
, from_tty
)
3250 cmd_show_list (showhistlist
, from_tty
, "");
3253 int info_verbose
= 0; /* Default verbose msgs off */
3255 /* Called by do_setshow_command. An elaborate joke. */
3258 set_verbose (args
, from_tty
, c
)
3261 struct cmd_list_element
*c
;
3263 char *cmdname
= "verbose";
3264 struct cmd_list_element
*showcmd
;
3266 showcmd
= lookup_cmd_1 (&cmdname
, showlist
, NULL
, 1);
3270 c
->doc
= "Set verbose printing of informational messages.";
3271 showcmd
->doc
= "Show verbose printing of informational messages.";
3275 c
->doc
= "Set verbosity.";
3276 showcmd
->doc
= "Show verbosity.";
3281 float_handler (signo
)
3284 /* This message is based on ANSI C, section 4.7. Note that integer
3285 divide by zero causes this, so "float" is a misnomer. */
3286 signal (SIGFPE
, float_handler
);
3287 error ("Erroneous arithmetic operation.");
3299 enablebreaklist
= NULL
;
3303 #ifdef TARGET_BYTE_ORDER_SELECTABLE
3307 showhistlist
= NULL
;
3308 unsethistlist
= NULL
;
3309 #if MAINTENANCE_CMDS
3310 maintenancelist
= NULL
;
3311 maintenanceinfolist
= NULL
;
3312 maintenanceprintlist
= NULL
;
3314 setprintlist
= NULL
;
3315 showprintlist
= NULL
;
3316 setchecklist
= NULL
;
3317 showchecklist
= NULL
;
3320 /* Init the history buffer. Note that we are called after the init file(s)
3321 * have been read so that the user can change the history file via his
3322 * .gdbinit file (for instance). The GDBHISTFILE environment variable
3323 * overrides all of this.
3331 tmpenv
= getenv ("HISTSIZE");
3333 history_size
= atoi (tmpenv
);
3334 else if (!history_size
)
3337 stifle_history (history_size
);
3339 tmpenv
= getenv ("GDBHISTFILE");
3341 history_filename
= savestring (tmpenv
, strlen(tmpenv
));
3342 else if (!history_filename
) {
3343 /* We include the current directory so that if the user changes
3344 directories the file written will be the same as the one
3346 history_filename
= concat (current_directory
, "/.gdb_history", NULL
);
3348 read_history (history_filename
);
3354 struct cmd_list_element
*c
;
3356 #ifdef TARGET_BYTE_ORDER_SELECTABLE
3358 add_prefix_cmd ("endian", class_support
, set_endian
,
3359 "Set endianness of target.",
3360 &endianlist
, "set endian ", 0, &setlist
);
3361 add_cmd ("big", class_support
, set_endian_big
,
3362 "Set target as being big endian.", &endianlist
);
3363 add_cmd ("little", class_support
, set_endian_little
,
3364 "Set target as being little endian.", &endianlist
);
3365 add_cmd ("auto", class_support
, set_endian_auto
,
3366 "Select target endianness automatically.", &endianlist
);
3367 add_cmd ("endian", class_support
, show_endian
,
3368 "Show endianness of target.", &showlist
);
3370 #endif /* defined (TARGET_BYTE_ORDER_SELECTABLE) */
3372 #ifdef DEFAULT_PROMPT
3373 prompt
= savestring (DEFAULT_PROMPT
, strlen(DEFAULT_PROMPT
));
3375 prompt
= savestring ("(gdb) ", 6);
3378 /* Set the important stuff up for command editing. */
3379 command_editing_p
= 1;
3380 history_expansion_p
= 0;
3381 write_history_p
= 0;
3383 /* Setup important stuff for command line editing. */
3384 rl_completion_entry_function
= (int (*)()) readline_line_completion_function
;
3385 rl_completer_word_break_characters
= gdb_completer_word_break_characters
;
3386 rl_completer_quote_characters
= gdb_completer_quote_characters
;
3387 rl_readline_name
= "gdb";
3389 /* Define the classes of commands.
3390 They will appear in the help list in the reverse of this order. */
3392 add_cmd ("internals", class_maintenance
, NO_FUNCTION
,
3393 "Maintenance commands.\n\
3394 Some gdb commands are provided just for use by gdb maintainers.\n\
3395 These commands are subject to frequent change, and may not be as\n\
3396 well documented as user commands.",
3398 add_cmd ("obscure", class_obscure
, NO_FUNCTION
, "Obscure features.", &cmdlist
);
3399 add_cmd ("aliases", class_alias
, NO_FUNCTION
, "Aliases of other commands.", &cmdlist
);
3400 add_cmd ("user-defined", class_user
, NO_FUNCTION
, "User-defined commands.\n\
3401 The commands in this class are those defined by the user.\n\
3402 Use the \"define\" command to define a command.", &cmdlist
);
3403 add_cmd ("support", class_support
, NO_FUNCTION
, "Support facilities.", &cmdlist
);
3404 add_cmd ("status", class_info
, NO_FUNCTION
, "Status inquiries.", &cmdlist
);
3405 add_cmd ("files", class_files
, NO_FUNCTION
, "Specifying and examining files.", &cmdlist
);
3406 add_cmd ("breakpoints", class_breakpoint
, NO_FUNCTION
, "Making program stop at certain points.", &cmdlist
);
3407 add_cmd ("data", class_vars
, NO_FUNCTION
, "Examining data.", &cmdlist
);
3408 add_cmd ("stack", class_stack
, NO_FUNCTION
, "Examining the stack.\n\
3409 The stack is made up of stack frames. Gdb assigns numbers to stack frames\n\
3410 counting from zero for the innermost (currently executing) frame.\n\n\
3411 At any time gdb identifies one frame as the \"selected\" frame.\n\
3412 Variable lookups are done with respect to the selected frame.\n\
3413 When the program being debugged stops, gdb selects the innermost frame.\n\
3414 The commands below can be used to select other frames by number or address.",
3416 add_cmd ("running", class_run
, NO_FUNCTION
, "Running the program.", &cmdlist
);
3418 add_com ("pwd", class_files
, pwd_command
,
3419 "Print working directory. This is used for your program as well.");
3420 c
= add_cmd ("cd", class_files
, cd_command
,
3421 "Set working directory to DIR for debugger and program being debugged.\n\
3422 The change does not take effect for the program being debugged\n\
3423 until the next time it is started.", &cmdlist
);
3424 c
->completer
= filename_completer
;
3427 (add_set_cmd ("prompt", class_support
, var_string
, (char *)&prompt
,
3432 add_com ("echo", class_support
, echo_command
,
3433 "Print a constant string. Give string as argument.\n\
3434 C escape sequences may be used in the argument.\n\
3435 No newline is added at the end of the argument;\n\
3436 use \"\\n\" if you want a newline to be printed.\n\
3437 Since leading and trailing whitespace are ignored in command arguments,\n\
3438 if you want to print some you must use \"\\\" before leading whitespace\n\
3439 to be printed or after trailing whitespace.");
3440 add_com ("document", class_support
, document_command
,
3441 "Document a user-defined command.\n\
3442 Give command name as argument. Give documentation on following lines.\n\
3443 End with a line of just \"end\".");
3444 add_com ("define", class_support
, define_command
,
3445 "Define a new command name. Command name is argument.\n\
3446 Definition appears on following lines, one command per line.\n\
3447 End with a line of just \"end\".\n\
3448 Use the \"document\" command to give documentation for the new command.\n\
3449 Commands defined in this way may have up to ten arguments.");
3452 c
= add_cmd ("source", class_support
, source_command
,
3453 "Read commands from a file named FILE.\n\
3454 Note that the file \"" GDBINIT_FILENAME
"\" is read automatically in this way\n\
3455 when gdb is started.", &cmdlist
);
3457 /* Punt file name, we can't help it easily. */
3458 c
= add_cmd ("source", class_support
, source_command
,
3459 "Read commands from a file named FILE.\n\
3460 Note that the file \".gdbinit\" is read automatically in this way\n\
3461 when gdb is started.", &cmdlist
);
3463 c
->completer
= filename_completer
;
3465 add_com ("quit", class_support
, quit_command
, "Exit gdb.");
3466 add_com ("help", class_support
, help_command
, "Print list of commands.");
3467 add_com_alias ("q", "quit", class_support
, 1);
3468 add_com_alias ("h", "help", class_support
, 1);
3471 c
= add_set_cmd ("verbose", class_support
, var_boolean
, (char *)&info_verbose
,
3474 add_show_from_set (c
, &showlist
);
3475 c
->function
.sfunc
= set_verbose
;
3476 set_verbose (NULL
, 0, c
);
3479 (add_set_cmd ("editing", class_support
, var_boolean
, (char *)&command_editing_p
,
3480 "Set editing of command lines as they are typed.\n\
3481 Use \"on\" to enable to enable the editing, and \"off\" to disable it.\n\
3482 Without an argument, command line editing is enabled. To edit, use\n\
3483 EMACS-like or VI-like commands like control-P or ESC.", &setlist
),
3486 add_prefix_cmd ("history", class_support
, set_history
,
3487 "Generic command for setting command history parameters.",
3488 &sethistlist
, "set history ", 0, &setlist
);
3489 add_prefix_cmd ("history", class_support
, show_history
,
3490 "Generic command for showing command history parameters.",
3491 &showhistlist
, "show history ", 0, &showlist
);
3494 (add_set_cmd ("expansion", no_class
, var_boolean
, (char *)&history_expansion_p
,
3495 "Set history expansion on command input.\n\
3496 Without an argument, history expansion is enabled.", &sethistlist
),
3500 (add_set_cmd ("save", no_class
, var_boolean
, (char *)&write_history_p
,
3501 "Set saving of the history record on exit.\n\
3502 Use \"on\" to enable to enable the saving, and \"off\" to disable it.\n\
3503 Without an argument, saving is enabled.", &sethistlist
),
3506 c
= add_set_cmd ("size", no_class
, var_integer
, (char *)&history_size
,
3507 "Set the size of the command history, \n\
3508 ie. the number of previous commands to keep a record of.", &sethistlist
);
3509 add_show_from_set (c
, &showhistlist
);
3510 c
->function
.sfunc
= set_history_size_command
;
3513 (add_set_cmd ("filename", no_class
, var_filename
, (char *)&history_filename
,
3514 "Set the filename in which to record the command history\n\
3515 (the list of previous commands of which a record is kept).", &sethistlist
),
3519 (add_set_cmd ("confirm", class_support
, var_boolean
,
3521 "Set whether to confirm potentially dangerous operations.",
3525 add_prefix_cmd ("info", class_info
, info_command
,
3526 "Generic command for showing things about the program being debugged.",
3527 &infolist
, "info ", 0, &cmdlist
);
3528 add_com_alias ("i", "info", class_info
, 1);
3530 add_com ("complete", class_obscure
, complete_command
,
3531 "List the completions for the rest of the line as a command.");
3533 add_prefix_cmd ("show", class_info
, show_command
,
3534 "Generic command for showing things about the debugger.",
3535 &showlist
, "show ", 0, &cmdlist
);
3536 /* Another way to get at the same thing. */
3537 add_info ("set", show_command
, "Show all GDB settings.");
3539 add_cmd ("commands", no_class
, show_commands
,
3540 "Show the history of commands you typed.\n\
3541 You can supply a command number to start with, or a `+' to start after\n\
3542 the previous command number shown.",
3545 add_cmd ("version", no_class
, show_version
,
3546 "Show what version of GDB this is.", &showlist
);
3548 add_com ("while", class_support
, while_command
,
3549 "Execute nested commands WHILE the conditional expression is non zero.\n\
3550 The conditional expression must follow the word `while' and must in turn be\n\
3551 followed by a new line. The nested commands must be entered one per line,\n\
3552 and should be terminated by the word `end'.");
3554 add_com ("if", class_support
, if_command
,
3555 "Execute nested commands once IF the conditional expression is non zero.\n\
3556 The conditional expression must follow the word `if' and must in turn be\n\
3557 followed by a new line. The nested commands must be entered one per line,\n\
3558 and should be terminated by the word 'else' or `end'. If an else clause\n\
3559 is used, the same rules apply to its nested commands as to the first ones.");
3561 /* If target is open when baud changes, it doesn't take effect until the
3562 next open (I think, not sure). */
3563 add_show_from_set (add_set_cmd ("remotebaud", no_class
,
3564 var_zinteger
, (char *)&baud_rate
,
3565 "Set baud rate for remote serial I/O.\n\
3566 This value is used to set the speed of the serial port when debugging\n\
3567 using remote targets.", &setlist
),
3571 add_set_cmd ("remotedebug", no_class
, var_zinteger
, (char *)&remote_debug
,
3572 "Set debugging of remote protocol.\n\
3573 When enabled, each packet sent or received with the remote target\n\
3574 is displayed.", &setlist
),