1 /* Top level stuff for GDB, the GNU debugger.
2 Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996
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. */
828 /* Evaluate the expression. */
829 val
= evaluate_expression (expr
);
831 /* If the value is false, then break out of the loop. */
832 if (!value_true (val
))
835 /* Execute the body of the while statement. */
836 current
= *cmd
->body_list
;
839 ret
= execute_control_command (current
);
841 /* If we got an error, or a "break" command, then stop
843 if (ret
== invalid_control
|| ret
== break_control
)
849 /* If we got a "continue" command, then restart the loop
851 if (ret
== continue_control
)
854 /* Get the next statement. */
855 current
= current
->next
;
859 /* Reset RET so that we don't recurse the break all the way down. */
860 if (ret
== break_control
)
861 ret
= simple_control
;
868 new_line
= insert_args (cmd
->line
);
870 return invalid_control
;
871 old_chain
= make_cleanup (free_current_contents
, &new_line
);
872 /* Parse the conditional for the if statement. */
873 expr
= parse_expression (new_line
);
874 make_cleanup (free_current_contents
, &expr
);
877 ret
= simple_control
;
879 /* Evaluate the conditional. */
880 val
= evaluate_expression (expr
);
882 /* Choose which arm to take commands from based on the value of the
883 conditional expression. */
884 if (value_true (val
))
885 current
= *cmd
->body_list
;
886 else if (cmd
->body_count
== 2)
887 current
= *(cmd
->body_list
+ 1);
889 /* Execute commands in the given arm. */
892 ret
= execute_control_command (current
);
894 /* If we got an error, get out. */
895 if (ret
!= simple_control
)
898 /* Get the next statement in the body. */
899 current
= current
->next
;
906 warning ("Invalid control type in command structure.");
907 return invalid_control
;
911 do_cleanups (old_chain
);
916 /* "while" command support. Executes a body of statements while the
917 loop condition is nonzero. */
920 while_command (arg
, from_tty
)
924 struct command_line
*command
= NULL
;
927 command
= get_command_line (while_control
, arg
);
932 execute_control_command (command
);
933 free_command_lines (&command
);
936 /* "if" command support. Execute either the true or false arm depending
937 on the value of the if conditional. */
940 if_command (arg
, from_tty
)
944 struct command_line
*command
= NULL
;
947 command
= get_command_line (if_control
, arg
);
952 execute_control_command (command
);
953 free_command_lines (&command
);
960 struct user_args
*oargs
= user_args
;
962 fatal ("Internal error, arg_cleanup called with no user args.\n");
964 user_args
= user_args
->next
;
968 /* Bind the incomming arguments for a user defined command to
969 $arg0, $arg1 ... $argMAXUSERARGS. */
971 static struct cleanup
*
975 struct user_args
*args
;
976 struct cleanup
*old_chain
;
977 unsigned int arg_count
= 0;
979 args
= (struct user_args
*)xmalloc (sizeof (struct user_args
));
980 memset (args
, 0, sizeof (struct user_args
));
982 args
->next
= user_args
;
985 old_chain
= make_cleanup (arg_cleanup
, 0);
994 if (arg_count
>= MAXUSERARGS
)
996 error ("user defined function may only have %d arguments.\n",
1001 /* Strip whitespace. */
1002 while (*p
== ' ' || *p
== '\t')
1005 /* P now points to an argument. */
1007 user_args
->a
[arg_count
].arg
= p
;
1009 /* Get to the end of this argument. */
1010 while (*p
&& *p
!= ' ' && *p
!= '\t')
1013 user_args
->a
[arg_count
].len
= p
- start_arg
;
1020 /* Given character string P, return a point to the first argument ($arg),
1021 or NULL if P contains no arguments. */
1027 while ((p
= strchr (p
, '$')))
1029 if (strncmp (p
, "$arg", 4) == 0 && isdigit (p
[4]))
1036 /* Insert the user defined arguments stored in user_arg into the $arg
1037 arguments found in line, with the updated copy being placed into nline. */
1043 char *p
, *save_line
, *new_line
;
1046 /* First we need to know how much memory to allocate for the new line. */
1049 while ((p
= locate_arg (line
)))
1054 if (i
>= user_args
->count
)
1056 error ("Missing argument %d in user function.\n", i
);
1059 len
+= user_args
->a
[i
].len
;
1063 /* Don't forget the tail. */
1064 len
+= strlen (line
);
1066 /* Allocate space for the new line and fill it in. */
1067 new_line
= (char *)xmalloc (len
+ 1);
1068 if (new_line
== NULL
)
1071 /* Restore pointer to beginning of old line. */
1074 /* Save pointer to beginning of new line. */
1075 save_line
= new_line
;
1077 while ((p
= locate_arg (line
)))
1081 memcpy (new_line
, line
, p
- line
);
1082 new_line
+= p
- line
;
1085 len
= user_args
->a
[i
].len
;
1088 memcpy (new_line
, user_args
->a
[i
].arg
, len
);
1093 /* Don't forget the tail. */
1094 strcpy (new_line
, line
);
1096 /* Return a pointer to the beginning of the new line. */
1101 execute_user_command (c
, args
)
1102 struct cmd_list_element
*c
;
1105 register struct command_line
*cmdlines
;
1106 struct cleanup
*old_chain
;
1107 enum command_control_type ret
;
1109 old_chain
= setup_user_args (args
);
1111 cmdlines
= c
->user_commands
;
1116 /* Set the instream to 0, indicating execution of a
1117 user-defined function. */
1118 old_chain
= make_cleanup (source_cleanup
, instream
);
1119 instream
= (FILE *) 0;
1122 ret
= execute_control_command (cmdlines
);
1123 if (ret
!= simple_control
&& ret
!= break_control
)
1125 warning ("Error in control structure.\n");
1128 cmdlines
= cmdlines
->next
;
1130 do_cleanups (old_chain
);
1133 /* Execute the line P as a command.
1134 Pass FROM_TTY as second argument to the defining function. */
1137 execute_command (p
, from_tty
)
1141 register struct cmd_list_element
*c
;
1142 register enum language flang
;
1143 static int warned
= 0;
1144 extern FILE *serial_logfp
;
1148 /* This can happen when command_line_input hits end of file. */
1152 if (serial_logfp
!= NULL
)
1153 serial_log_command (p
);
1155 while (*p
== ' ' || *p
== '\t') p
++;
1160 c
= lookup_cmd (&p
, cmdlist
, "", 0, 1);
1161 /* Pass null arg rather than an empty one. */
1164 /* Clear off trailing whitespace, except for set and complete command. */
1165 if (arg
&& c
->type
!= set_cmd
&& c
->function
.cfunc
!= complete_command
)
1167 p
= arg
+ strlen (arg
) - 1;
1168 while (p
>= arg
&& (*p
== ' ' || *p
== '\t'))
1173 /* If this command has been hooked, run the hook first. */
1175 execute_user_command (c
->hook
, (char *)0);
1177 if (c
->class == class_user
)
1178 execute_user_command (c
, arg
);
1179 else if (c
->type
== set_cmd
|| c
->type
== show_cmd
)
1180 do_setshow_command (arg
, from_tty
& caution
, c
);
1181 else if (c
->function
.cfunc
== NO_FUNCTION
)
1182 error ("That is not a command, just a help topic.");
1183 else if (call_command_hook
)
1184 call_command_hook (c
, arg
, from_tty
& caution
);
1186 (*c
->function
.cfunc
) (arg
, from_tty
& caution
);
1189 /* Tell the user if the language has changed (except first time). */
1190 if (current_language
!= expected_language
)
1192 if (language_mode
== language_mode_auto
) {
1193 language_info (1); /* Print what changed. */
1198 /* Warn the user if the working language does not match the
1199 language of the current frame. Only warn the user if we are
1200 actually running the program, i.e. there is a stack. */
1201 /* FIXME: This should be cacheing the frame and only running when
1202 the frame changes. */
1204 if (target_has_stack
)
1206 flang
= get_frame_language ();
1208 && flang
!= language_unknown
1209 && flang
!= current_language
->la_language
)
1211 printf_filtered ("%s\n", lang_frame_mismatch_warn
);
1219 command_loop_marker (foo
)
1224 /* Read commands from `instream' and execute them
1225 until end of file or error reading instream. */
1230 struct cleanup
*old_chain
;
1232 int stdin_is_tty
= ISATTY (stdin
);
1233 long time_at_cmd_start
;
1235 long space_at_cmd_start
;
1237 extern int display_time
;
1238 extern int display_space
;
1240 while (!feof (instream
))
1242 if (window_hook
&& instream
== stdin
)
1243 (*window_hook
) (instream
, prompt
);
1246 if (instream
== stdin
&& stdin_is_tty
)
1247 reinitialize_more_filter ();
1248 old_chain
= make_cleanup (command_loop_marker
, 0);
1249 command
= command_line_input (instream
== stdin
? prompt
: (char *) NULL
,
1250 instream
== stdin
, "prompt");
1254 time_at_cmd_start
= get_run_time ();
1259 extern char **environ
;
1260 char *lim
= (char *) sbrk (0);
1262 space_at_cmd_start
= (long) (lim
- (char *) &environ
);
1266 execute_command (command
, instream
== stdin
);
1267 /* Do any commands attached to breakpoint we stopped at. */
1268 bpstat_do_actions (&stop_bpstat
);
1269 do_cleanups (old_chain
);
1273 long cmd_time
= get_run_time () - time_at_cmd_start
;
1275 printf_unfiltered ("Command execution time: %ld.%06ld\n",
1276 cmd_time
/ 1000000, cmd_time
% 1000000);
1282 extern char **environ
;
1283 char *lim
= (char *) sbrk (0);
1284 long space_now
= lim
- (char *) &environ
;
1285 long space_diff
= space_now
- space_at_cmd_start
;
1287 printf_unfiltered ("Space used: %ld (%c%ld for this command)\n",
1289 (space_diff
>= 0 ? '+' : '-'),
1296 /* Commands call this if they do not want to be repeated by null lines. */
1304 /* If we aren't reading from standard input, we are saving the last
1305 thing read from stdin in line and don't want to delete it. Null lines
1306 won't repeat here in any case. */
1307 if (instream
== stdin
)
1311 /* Read a line from the stream "instream" without command line editing.
1313 It prints PRROMPT once at the start.
1314 Action is compatible with "readline", e.g. space for the result is
1315 malloc'd and should be freed by the caller.
1317 A NULL return means end of file. */
1319 gdb_readline (prrompt
)
1324 int input_index
= 0;
1325 int result_size
= 80;
1329 /* Don't use a _filtered function here. It causes the assumed
1330 character position to be off, since the newline we read from
1331 the user is not accounted for. */
1332 fputs_unfiltered (prrompt
, gdb_stdout
);
1334 /* Move to a new line so the entered line doesn't have a prompt
1335 on the front of it. */
1336 fputs_unfiltered ("\n", gdb_stdout
);
1338 gdb_flush (gdb_stdout
);
1341 result
= (char *) xmalloc (result_size
);
1345 /* Read from stdin if we are executing a user defined command.
1346 This is the right thing for prompt_for_continue, at least. */
1347 c
= fgetc (instream
? instream
: stdin
);
1351 if (input_index
> 0)
1352 /* The last line does not end with a newline. Return it, and
1353 if we are called again fgetc will still return EOF and
1354 we'll return NULL then. */
1363 result
[input_index
++] = c
;
1364 while (input_index
>= result_size
)
1367 result
= (char *) xrealloc (result
, result_size
);
1371 result
[input_index
++] = '\0';
1375 /* Variables which control command line editing and history
1376 substitution. These variables are given default values at the end
1378 static int command_editing_p
;
1379 static int history_expansion_p
;
1380 static int write_history_p
;
1381 static int history_size
;
1382 static char *history_filename
;
1384 /* readline uses the word breaks for two things:
1385 (1) In figuring out where to point the TEXT parameter to the
1386 rl_completion_entry_function. Since we don't use TEXT for much,
1387 it doesn't matter a lot what the word breaks are for this purpose, but
1388 it does affect how much stuff M-? lists.
1389 (2) If one of the matches contains a word break character, readline
1390 will quote it. That's why we switch between
1391 gdb_completer_word_break_characters and
1392 gdb_completer_command_word_break_characters. I'm not sure when
1393 we need this behavior (perhaps for funky characters in C++ symbols?). */
1395 /* Variables which are necessary for fancy command line editing. */
1396 char *gdb_completer_word_break_characters
=
1397 " \t\n!@#$%^&*()+=|~`}{[]\"';:?/>.<,-";
1399 /* When completing on command names, we remove '-' from the list of
1400 word break characters, since we use it in command names. If the
1401 readline library sees one in any of the current completion strings,
1402 it thinks that the string needs to be quoted and automatically supplies
1404 char *gdb_completer_command_word_break_characters
=
1405 " \t\n!@#$%^&*()+=|~`}{[]\"';:?/>.<,";
1407 /* Characters that can be used to quote completion strings. Note that we
1408 can't include '"' because the gdb C parser treats such quoted sequences
1410 char *gdb_completer_quote_characters
=
1413 /* Functions that are used as part of the fancy command line editing. */
1415 /* This can be used for functions which don't want to complete on symbols
1416 but don't want to complete on anything else either. */
1419 noop_completer (text
, prefix
)
1426 /* Complete on filenames. */
1428 filename_completer (text
, word
)
1432 /* From readline. */
1433 extern char *filename_completion_function ();
1434 int subsequent_name
;
1436 int return_val_used
;
1437 int return_val_alloced
;
1439 return_val_used
= 0;
1440 /* Small for testing. */
1441 return_val_alloced
= 1;
1442 return_val
= (char **) xmalloc (return_val_alloced
* sizeof (char *));
1444 subsequent_name
= 0;
1448 p
= filename_completion_function (text
, subsequent_name
);
1449 if (return_val_used
>= return_val_alloced
)
1451 return_val_alloced
*= 2;
1453 (char **) xrealloc (return_val
,
1454 return_val_alloced
* sizeof (char *));
1458 return_val
[return_val_used
++] = p
;
1461 /* Like emacs, don't complete on old versions. Especially useful
1462 in the "source" command. */
1463 if (p
[strlen (p
) - 1] == '~')
1469 /* Return exactly p. */
1470 return_val
[return_val_used
++] = p
;
1471 else if (word
> text
)
1473 /* Return some portion of p. */
1474 q
= xmalloc (strlen (p
) + 5);
1475 strcpy (q
, p
+ (word
- text
));
1476 return_val
[return_val_used
++] = q
;
1481 /* Return some of TEXT plus p. */
1482 q
= xmalloc (strlen (p
) + (text
- word
) + 5);
1483 strncpy (q
, word
, text
- word
);
1484 q
[text
- word
] = '\0';
1486 return_val
[return_val_used
++] = q
;
1490 subsequent_name
= 1;
1493 /* There is no way to do this just long enough to affect quote inserting
1494 without also affecting the next completion. This should be fixed in
1496 /* Insure that readline does the right thing
1497 with respect to inserting quotes. */
1498 rl_completer_word_break_characters
= "";
1503 /* Here are some useful test cases for completion. FIXME: These should
1504 be put in the test suite. They should be tested with both M-? and TAB.
1506 "show output-" "radix"
1507 "show output" "-radix"
1508 "p" ambiguous (commands starting with p--path, print, printf, etc.)
1509 "p " ambiguous (all symbols)
1510 "info t foo" no completions
1511 "info t " no completions
1512 "info t" ambiguous ("info target", "info terminal", etc.)
1513 "info ajksdlfk" no completions
1514 "info ajksdlfk " no completions
1516 "info " ambiguous (all info commands)
1517 "p \"a" no completions (string constant)
1518 "p 'a" ambiguous (all symbols starting with a)
1519 "p b-a" ambiguous (all symbols starting with a)
1520 "p b-" ambiguous (all symbols)
1521 "file Make" "file" (word break hard to screw up here)
1522 "file ../gdb.stabs/we" "ird" (needs to not break word at slash)
1525 /* Generate completions one by one for the completer. Each time we are
1526 called return another potential completion to the caller.
1527 line_completion just completes on commands or passes the buck to the
1528 command's completer function, the stuff specific to symbol completion
1529 is in make_symbol_completion_list.
1531 TEXT is the caller's idea of the "word" we are looking at.
1533 MATCHES is the number of matches that have currently been collected from
1534 calling this completion function. When zero, then we need to initialize,
1535 otherwise the initialization has already taken place and we can just
1536 return the next potential completion string.
1538 LINE_BUFFER is available to be looked at; it contains the entire text
1539 of the line. POINT is the offset in that line of the cursor. You
1540 should pretend that the line ends at POINT.
1542 Returns NULL if there are no more completions, else a pointer to a string
1543 which is a possible completion, it is the caller's responsibility to
1547 line_completion_function (text
, matches
, line_buffer
, point
)
1553 static char **list
= (char **)NULL
; /* Cache of completions */
1554 static int index
; /* Next cached completion */
1555 char *output
= NULL
;
1556 char *tmp_command
, *p
;
1557 /* Pointer within tmp_command which corresponds to text. */
1559 struct cmd_list_element
*c
, *result_list
;
1563 /* The caller is beginning to accumulate a new set of completions, so
1564 we need to find all of them now, and cache them for returning one at
1565 a time on future calls. */
1569 /* Free the storage used by LIST, but not by the strings inside.
1570 This is because rl_complete_internal () frees the strings. */
1576 /* Choose the default set of word break characters to break completions.
1577 If we later find out that we are doing completions on command strings
1578 (as opposed to strings supplied by the individual command completer
1579 functions, which can be any string) then we will switch to the
1580 special word break set for command strings, which leaves out the
1581 '-' character used in some commands. */
1583 rl_completer_word_break_characters
=
1584 gdb_completer_word_break_characters
;
1586 /* Decide whether to complete on a list of gdb commands or on symbols. */
1587 tmp_command
= (char *) alloca (point
+ 1);
1590 strncpy (tmp_command
, line_buffer
, point
);
1591 tmp_command
[point
] = '\0';
1592 /* Since text always contains some number of characters leading up
1593 to point, we can find the equivalent position in tmp_command
1594 by subtracting that many characters from the end of tmp_command. */
1595 word
= tmp_command
+ point
- strlen (text
);
1599 /* An empty line we want to consider ambiguous; that is, it
1600 could be any command. */
1601 c
= (struct cmd_list_element
*) -1;
1606 c
= lookup_cmd_1 (&p
, cmdlist
, &result_list
, 1);
1609 /* Move p up to the next interesting thing. */
1610 while (*p
== ' ' || *p
== '\t')
1617 /* It is an unrecognized command. So there are no
1618 possible completions. */
1621 else if (c
== (struct cmd_list_element
*) -1)
1625 /* lookup_cmd_1 advances p up to the first ambiguous thing, but
1626 doesn't advance over that thing itself. Do so now. */
1628 while (*q
&& (isalnum (*q
) || *q
== '-' || *q
== '_'))
1630 if (q
!= tmp_command
+ point
)
1632 /* There is something beyond the ambiguous
1633 command, so there are no possible completions. For
1634 example, "info t " or "info t foo" does not complete
1635 to anything, because "info t" can be "info target" or
1641 /* We're trying to complete on the command which was ambiguous.
1642 This we can deal with. */
1645 list
= complete_on_cmdlist (*result_list
->prefixlist
, p
,
1650 list
= complete_on_cmdlist (cmdlist
, p
, word
);
1652 /* Insure that readline does the right thing with respect to
1653 inserting quotes. */
1654 rl_completer_word_break_characters
=
1655 gdb_completer_command_word_break_characters
;
1660 /* We've recognized a full command. */
1662 if (p
== tmp_command
+ point
)
1664 /* There is no non-whitespace in the line beyond the command. */
1666 if (p
[-1] == ' ' || p
[-1] == '\t')
1668 /* The command is followed by whitespace; we need to complete
1669 on whatever comes after command. */
1672 /* It is a prefix command; what comes after it is
1673 a subcommand (e.g. "info "). */
1674 list
= complete_on_cmdlist (*c
->prefixlist
, p
, word
);
1676 /* Insure that readline does the right thing
1677 with respect to inserting quotes. */
1678 rl_completer_word_break_characters
=
1679 gdb_completer_command_word_break_characters
;
1683 list
= complete_on_enum (c
->enums
, p
, word
);
1684 rl_completer_word_break_characters
=
1685 gdb_completer_command_word_break_characters
;
1689 /* It is a normal command; what comes after it is
1690 completed by the command's completer function. */
1691 list
= (*c
->completer
) (p
, word
);
1696 /* The command is not followed by whitespace; we need to
1697 complete on the command itself. e.g. "p" which is a
1698 command itself but also can complete to "print", "ptype"
1702 /* Find the command we are completing on. */
1704 while (q
> tmp_command
)
1706 if (isalnum (q
[-1]) || q
[-1] == '-' || q
[-1] == '_')
1712 list
= complete_on_cmdlist (result_list
, q
, word
);
1714 /* Insure that readline does the right thing
1715 with respect to inserting quotes. */
1716 rl_completer_word_break_characters
=
1717 gdb_completer_command_word_break_characters
;
1722 /* There is non-whitespace beyond the command. */
1724 if (c
->prefixlist
&& !c
->allow_unknown
)
1726 /* It is an unrecognized subcommand of a prefix command,
1727 e.g. "info adsfkdj". */
1732 list
= complete_on_enum (c
->enums
, p
, word
);
1736 /* It is a normal command. */
1737 list
= (*c
->completer
) (p
, word
);
1743 /* If we found a list of potential completions during initialization then
1744 dole them out one at a time. The vector of completions is NULL
1745 terminated, so after returning the last one, return NULL (and continue
1746 to do so) each time we are called after that, until a new list is
1751 output
= list
[index
];
1759 /* Can't do this because readline hasn't yet checked the word breaks
1760 for figuring out whether to insert a quote. */
1762 /* Make sure the word break characters are set back to normal for the
1763 next time that readline tries to complete something. */
1764 rl_completer_word_break_characters
=
1765 gdb_completer_word_break_characters
;
1771 /* Line completion interface function for readline. */
1774 readline_line_completion_function (text
, matches
)
1778 return line_completion_function (text
, matches
, rl_line_buffer
, rl_point
);
1781 /* Skip over a possibly quoted word (as defined by the quote characters
1782 and word break characters the completer uses). Returns pointer to the
1783 location after the "word". */
1789 char quote_char
= '\0';
1792 for (scan
= str
; *scan
!= '\0'; scan
++)
1794 if (quote_char
!= '\0')
1796 /* Ignore everything until the matching close quote char */
1797 if (*scan
== quote_char
)
1799 /* Found matching close quote. */
1804 else if (strchr (gdb_completer_quote_characters
, *scan
))
1806 /* Found start of a quoted string. */
1809 else if (strchr (gdb_completer_word_break_characters
, *scan
))
1823 #if STOP_SIGNAL == SIGTSTP
1824 signal (SIGTSTP
, SIG_DFL
);
1826 kill (getpid (), SIGTSTP
);
1827 signal (SIGTSTP
, stop_sig
);
1829 signal (STOP_SIGNAL
, stop_sig
);
1831 printf_unfiltered ("%s", prompt
);
1832 gdb_flush (gdb_stdout
);
1834 /* Forget about any previous command -- null line now will do nothing. */
1837 #endif /* STOP_SIGNAL */
1839 /* Initialize signal handlers. */
1849 signal (SIGINT
, request_quit
);
1851 /* If SIGTRAP was set to SIG_IGN, then the SIG_IGN will get passed
1852 to the inferior and breakpoints will be ignored. */
1854 signal (SIGTRAP
, SIG_DFL
);
1857 /* If we initialize SIGQUIT to SIG_IGN, then the SIG_IGN will get
1858 passed to the inferior, which we don't want. It would be
1859 possible to do a "signal (SIGQUIT, SIG_DFL)" after we fork, but
1860 on BSD4.3 systems using vfork, that can affect the
1861 GDB process as well as the inferior (the signal handling tables
1862 might be in memory, shared between the two). Since we establish
1863 a handler for SIGQUIT, when we call exec it will set the signal
1864 to SIG_DFL for us. */
1865 signal (SIGQUIT
, do_nothing
);
1866 if (signal (SIGHUP
, do_nothing
) != SIG_IGN
)
1867 signal (SIGHUP
, disconnect
);
1868 signal (SIGFPE
, float_handler
);
1870 #if defined(SIGWINCH) && defined(SIGWINCH_HANDLER)
1871 signal (SIGWINCH
, SIGWINCH_HANDLER
);
1875 /* Read one line from the command input stream `instream'
1876 into the local static buffer `linebuffer' (whose current length
1878 The buffer is made bigger as necessary.
1879 Returns the address of the start of the line.
1881 NULL is returned for end of file.
1883 *If* the instream == stdin & stdin is a terminal, the line read
1884 is copied into the file line saver (global var char *line,
1885 length linesize) so that it can be duplicated.
1887 This routine either uses fancy command line editing or
1888 simple input as the user has requested. */
1891 command_line_input (prrompt
, repeat
, annotation_suffix
)
1894 char *annotation_suffix
;
1896 static char *linebuffer
= 0;
1897 static unsigned linelength
= 0;
1901 char *local_prompt
= prrompt
;
1905 /* The annotation suffix must be non-NULL. */
1906 if (annotation_suffix
== NULL
)
1907 annotation_suffix
= "";
1909 if (annotation_level
> 1 && instream
== stdin
)
1911 local_prompt
= alloca ((prrompt
== NULL
? 0 : strlen (prrompt
))
1912 + strlen (annotation_suffix
) + 40);
1913 if (prrompt
== NULL
)
1914 local_prompt
[0] = '\0';
1916 strcpy (local_prompt
, prrompt
);
1917 strcat (local_prompt
, "\n\032\032");
1918 strcat (local_prompt
, annotation_suffix
);
1919 strcat (local_prompt
, "\n");
1922 if (linebuffer
== 0)
1925 linebuffer
= (char *) xmalloc (linelength
);
1930 /* Control-C quits instantly if typed while in this loop
1931 since it should not wait until the user types a newline. */
1935 signal (STOP_SIGNAL
, stop_sig
);
1940 /* Make sure that all output has been output. Some machines may let
1941 you get away with leaving out some of the gdb_flush, but not all. */
1943 gdb_flush (gdb_stdout
);
1944 gdb_flush (gdb_stderr
);
1946 if (source_file_name
!= NULL
)
1948 ++source_line_number
;
1949 sprintf (source_error
,
1950 "%s%s:%d: Error in sourced command file:\n",
1953 source_line_number
);
1954 error_pre_print
= source_error
;
1957 if (annotation_level
> 1 && instream
== stdin
)
1959 printf_unfiltered ("\n\032\032pre-");
1960 printf_unfiltered (annotation_suffix
);
1961 printf_unfiltered ("\n");
1964 /* Don't use fancy stuff if not talking to stdin. */
1965 if (command_editing_p
&& instream
== stdin
1966 && ISATTY (instream
))
1967 rl
= readline (local_prompt
);
1969 rl
= gdb_readline (local_prompt
);
1971 if (annotation_level
> 1 && instream
== stdin
)
1973 printf_unfiltered ("\n\032\032post-");
1974 printf_unfiltered (annotation_suffix
);
1975 printf_unfiltered ("\n");
1978 if (!rl
|| rl
== (char *) EOF
)
1983 if (strlen(rl
) + 1 + (p
- linebuffer
) > linelength
)
1985 linelength
= strlen(rl
) + 1 + (p
- linebuffer
);
1986 nline
= (char *) xrealloc (linebuffer
, linelength
);
1987 p
+= nline
- linebuffer
;
1991 /* Copy line. Don't copy null at end. (Leaves line alone
1992 if this was just a newline) */
1996 free (rl
); /* Allocated in readline. */
1998 if (p
== linebuffer
|| *(p
- 1) != '\\')
2001 p
--; /* Put on top of '\'. */
2002 local_prompt
= (char *) 0;
2007 signal (STOP_SIGNAL
, SIG_DFL
);
2014 #define SERVER_COMMAND_LENGTH 7
2016 (p
- linebuffer
> SERVER_COMMAND_LENGTH
)
2017 && STREQN (linebuffer
, "server ", SERVER_COMMAND_LENGTH
);
2020 /* Note that we don't set `line'. Between this and the check in
2021 dont_repeat, this insures that repeating will still do the
2024 return linebuffer
+ SERVER_COMMAND_LENGTH
;
2027 /* Do history expansion if that is wished. */
2028 if (history_expansion_p
&& instream
== stdin
2029 && ISATTY (instream
))
2031 char *history_value
;
2034 *p
= '\0'; /* Insert null now. */
2035 expanded
= history_expand (linebuffer
, &history_value
);
2038 /* Print the changes. */
2039 printf_unfiltered ("%s\n", history_value
);
2041 /* If there was an error, call this function again. */
2044 free (history_value
);
2045 return command_line_input (prrompt
, repeat
, annotation_suffix
);
2047 if (strlen (history_value
) > linelength
)
2049 linelength
= strlen (history_value
) + 1;
2050 linebuffer
= (char *) xrealloc (linebuffer
, linelength
);
2052 strcpy (linebuffer
, history_value
);
2053 p
= linebuffer
+ strlen(linebuffer
);
2054 free (history_value
);
2058 /* If we just got an empty line, and that is supposed
2059 to repeat the previous command, return the value in the
2061 if (repeat
&& p
== linebuffer
)
2063 for (p1
= linebuffer
; *p1
== ' ' || *p1
== '\t'; p1
++) ;
2069 /* Add line to history if appropriate. */
2070 if (instream
== stdin
2071 && ISATTY (stdin
) && *linebuffer
)
2072 add_history (linebuffer
);
2074 /* Note: lines consisting solely of comments are added to the command
2075 history. This is useful when you type a command, and then
2076 realize you don't want to execute it quite yet. You can comment
2077 out the command and then later fetch it from the value history
2078 and remove the '#'. The kill ring is probably better, but some
2079 people are in the habit of commenting things out. */
2081 *p1
= '\0'; /* Found a comment. */
2083 /* Save into global buffer if appropriate. */
2086 if (linelength
> linesize
)
2088 line
= xrealloc (line
, linelength
);
2089 linesize
= linelength
;
2091 strcpy (line
, linebuffer
);
2099 /* Expand the body_list of COMMAND so that it can hold NEW_LENGTH
2100 code bodies. This is typically used when we encounter an "else"
2101 clause for an "if" command. */
2104 realloc_body_list (command
, new_length
)
2105 struct command_line
*command
;
2109 struct command_line
**body_list
;
2111 n
= command
->body_count
;
2113 /* Nothing to do? */
2114 if (new_length
<= n
)
2117 body_list
= (struct command_line
**)
2118 xmalloc (sizeof (struct command_line
*) * new_length
);
2120 memcpy (body_list
, command
->body_list
, sizeof (struct command_line
*) * n
);
2122 free (command
->body_list
);
2123 command
->body_list
= body_list
;
2124 command
->body_count
= new_length
;
2127 /* Read one line from the input stream. If the command is an "else" or
2128 "end", return such an indication to the caller. */
2130 static enum misc_command_type
2131 read_next_line (command
)
2132 struct command_line
**command
;
2134 char *p
, *p1
, *prompt_ptr
, control_prompt
[256];
2137 if (control_level
>= 254)
2138 error ("Control nesting too deep!\n");
2140 /* Set a prompt based on the nesting of the control commands. */
2141 if (instream
== stdin
)
2143 for (i
= 0; i
< control_level
; i
++)
2144 control_prompt
[i
] = ' ';
2145 control_prompt
[i
] = '>';
2146 control_prompt
[i
+1] = '\0';
2147 prompt_ptr
= (char *)&control_prompt
[0];
2152 p
= command_line_input (prompt_ptr
, instream
== stdin
, "commands");
2154 /* Not sure what to do here. */
2158 /* Strip leading and trailing whitespace. */
2159 while (*p
== ' ' || *p
== '\t')
2162 p1
= p
+ strlen (p
);
2163 while (p1
!= p
&& (p1
[-1] == ' ' || p1
[-1] == '\t'))
2166 /* Blanks and comments don't really do anything, but we need to
2167 distinguish them from else, end and other commands which can be
2169 if (p1
== p
|| p
[0] == '#')
2172 /* Is this the end of a simple, while, or if control structure? */
2173 if (p1
- p
== 3 && !strncmp (p
, "end", 3))
2176 /* Is the else clause of an if control structure? */
2177 if (p1
- p
== 4 && !strncmp (p
, "else", 4))
2178 return else_command
;
2180 /* Check for while, if, break, continue, etc and build a new command
2181 line structure for them. */
2182 if (p1
- p
> 5 && !strncmp (p
, "while", 5))
2183 *command
= build_command_line (while_control
, p
+ 6);
2184 else if (p1
- p
> 2 && !strncmp (p
, "if", 2))
2185 *command
= build_command_line (if_control
, p
+ 3);
2186 else if (p1
- p
== 10 && !strncmp (p
, "loop_break", 10))
2188 *command
= (struct command_line
*)
2189 xmalloc (sizeof (struct command_line
));
2190 (*command
)->next
= NULL
;
2191 (*command
)->line
= NULL
;
2192 (*command
)->control_type
= break_control
;
2193 (*command
)->body_count
= 0;
2194 (*command
)->body_list
= NULL
;
2196 else if (p1
- p
== 13 && !strncmp (p
, "loop_continue", 13))
2198 *command
= (struct command_line
*)
2199 xmalloc (sizeof (struct command_line
));
2200 (*command
)->next
= NULL
;
2201 (*command
)->line
= NULL
;
2202 (*command
)->control_type
= continue_control
;
2203 (*command
)->body_count
= 0;
2204 (*command
)->body_list
= NULL
;
2208 /* A normal command. */
2209 *command
= (struct command_line
*)
2210 xmalloc (sizeof (struct command_line
));
2211 (*command
)->next
= NULL
;
2212 (*command
)->line
= savestring (p
, p1
- p
);
2213 (*command
)->control_type
= simple_control
;
2214 (*command
)->body_count
= 0;
2215 (*command
)->body_list
= NULL
;
2218 /* Nothing special. */
2222 /* Recursively read in the control structures and create a command_line
2225 The parent_control parameter is the control structure in which the
2226 following commands are nested. */
2228 static enum command_control_type
2229 recurse_read_control_structure (current_cmd
)
2230 struct command_line
*current_cmd
;
2232 int current_body
, i
;
2233 enum misc_command_type val
;
2234 enum command_control_type ret
;
2235 struct command_line
**body_ptr
, *child_tail
, *next
;
2240 /* Sanity checks. */
2241 if (current_cmd
->control_type
== simple_control
)
2243 error ("Recursed on a simple control type\n");
2244 return invalid_control
;
2247 if (current_body
> current_cmd
->body_count
)
2249 error ("Allocated body is smaller than this command type needs\n");
2250 return invalid_control
;
2253 /* Read lines from the input stream and build control structures. */
2259 val
= read_next_line (&next
);
2261 /* Just skip blanks and comments. */
2262 if (val
== nop_command
)
2265 if (val
== end_command
)
2267 if (current_cmd
->control_type
== while_control
2268 || current_cmd
->control_type
== if_control
)
2270 /* Success reading an entire control structure. */
2271 ret
= simple_control
;
2276 ret
= invalid_control
;
2281 /* Not the end of a control structure. */
2282 if (val
== else_command
)
2284 if (current_cmd
->control_type
== if_control
2285 && current_body
== 1)
2287 realloc_body_list (current_cmd
, 2);
2294 ret
= invalid_control
;
2301 child_tail
->next
= next
;
2305 body_ptr
= current_cmd
->body_list
;
2306 for (i
= 1; i
< current_body
; i
++)
2315 /* If the latest line is another control structure, then recurse
2317 if (next
->control_type
== while_control
2318 || next
->control_type
== if_control
)
2321 ret
= recurse_read_control_structure (next
);
2324 if (ret
!= simple_control
)
2335 /* Read lines from the input stream
2336 and accumulate them in a chain of struct command_line's
2337 which is then returned. */
2339 struct command_line
*
2340 read_command_lines ()
2342 struct command_line
*head
, *tail
, *next
;
2343 struct cleanup
*old_chain
;
2344 enum command_control_type ret
;
2345 enum misc_command_type val
;
2352 val
= read_next_line (&next
);
2354 /* Ignore blank lines or comments. */
2355 if (val
== nop_command
)
2358 if (val
== end_command
)
2360 ret
= simple_control
;
2364 if (val
!= ok_command
)
2366 ret
= invalid_control
;
2370 if (next
->control_type
== while_control
2371 || next
->control_type
== if_control
)
2374 ret
= recurse_read_control_structure (next
);
2377 if (ret
== invalid_control
)
2388 old_chain
= make_cleanup (free_command_lines
, &head
);
2397 if (ret
!= invalid_control
)
2399 discard_cleanups (old_chain
);
2403 do_cleanups (old_chain
);
2409 /* Free a chain of struct command_line's. */
2412 free_command_lines (lptr
)
2413 struct command_line
**lptr
;
2415 register struct command_line
*l
= *lptr
;
2416 register struct command_line
*next
;
2417 struct command_line
**blist
;
2422 if (l
->body_count
> 0)
2424 blist
= l
->body_list
;
2425 for (i
= 0; i
< l
->body_count
; i
++, blist
++)
2426 free_command_lines (blist
);
2435 /* Add an element to the list of info subcommands. */
2438 add_info (name
, fun
, doc
)
2440 void (*fun
) PARAMS ((char *, int));
2443 add_cmd (name
, no_class
, fun
, doc
, &infolist
);
2446 /* Add an alias to the list of info subcommands. */
2449 add_info_alias (name
, oldname
, abbrev_flag
)
2454 add_alias_cmd (name
, oldname
, 0, abbrev_flag
, &infolist
);
2457 /* The "info" command is defined as a prefix, with allow_unknown = 0.
2458 Therefore, its own definition is called only for "info" with no args. */
2462 info_command (arg
, from_tty
)
2466 printf_unfiltered ("\"info\" must be followed by the name of an info command.\n");
2467 help_list (infolist
, "info ", -1, gdb_stdout
);
2470 /* The "complete" command is used by Emacs to implement completion. */
2474 complete_command (arg
, from_tty
)
2486 argpoint
= strlen (arg
);
2488 for (completion
= line_completion_function (arg
, i
= 0, arg
, argpoint
);
2490 completion
= line_completion_function (arg
, ++i
, arg
, argpoint
))
2492 printf_unfiltered ("%s\n", completion
);
2497 /* The "show" command with no arguments shows all the settings. */
2501 show_command (arg
, from_tty
)
2505 cmd_show_list (showlist
, from_tty
, "");
2508 /* Add an element to the list of commands. */
2511 add_com (name
, class, fun
, doc
)
2513 enum command_class
class;
2514 void (*fun
) PARAMS ((char *, int));
2517 add_cmd (name
, class, fun
, doc
, &cmdlist
);
2520 /* Add an alias or abbreviation command to the list of commands. */
2523 add_com_alias (name
, oldname
, class, abbrev_flag
)
2526 enum command_class
class;
2529 add_alias_cmd (name
, oldname
, class, abbrev_flag
, &cmdlist
);
2536 error ("Argument required (%s).", why
);
2541 help_command (command
, from_tty
)
2543 int from_tty
; /* Ignored */
2545 help_cmd (command
, gdb_stdout
);
2549 validate_comname (comname
)
2555 error_no_arg ("name of command to define");
2560 if (!isalnum(*p
) && *p
!= '-' && *p
!= '_')
2561 error ("Junk in argument list: \"%s\"", p
);
2566 /* This is just a placeholder in the command data structures. */
2568 user_defined_command (ignore
, from_tty
)
2575 define_command (comname
, from_tty
)
2579 register struct command_line
*cmds
;
2580 register struct cmd_list_element
*c
, *newc
, *hookc
= 0;
2581 char *tem
= comname
;
2582 #define HOOK_STRING "hook-"
2585 validate_comname (comname
);
2587 /* Look it up, and verify that we got an exact match. */
2588 c
= lookup_cmd (&tem
, cmdlist
, "", -1, 1);
2589 if (c
&& !STREQ (comname
, c
->name
))
2594 if (c
->class == class_user
|| c
->class == class_alias
)
2595 tem
= "Redefine command \"%s\"? ";
2597 tem
= "Really redefine built-in command \"%s\"? ";
2598 if (!query (tem
, c
->name
))
2599 error ("Command \"%s\" not redefined.", c
->name
);
2602 /* If this new command is a hook, then mark the command which it
2603 is hooking. Note that we allow hooking `help' commands, so that
2604 we can hook the `stop' pseudo-command. */
2606 if (!strncmp (comname
, HOOK_STRING
, HOOK_LEN
))
2608 /* Look up cmd it hooks, and verify that we got an exact match. */
2609 tem
= comname
+HOOK_LEN
;
2610 hookc
= lookup_cmd (&tem
, cmdlist
, "", -1, 0);
2611 if (hookc
&& !STREQ (comname
+HOOK_LEN
, hookc
->name
))
2615 warning ("Your new `%s' command does not hook any existing command.",
2617 if (!query ("Proceed? "))
2618 error ("Not confirmed.");
2622 comname
= savestring (comname
, strlen (comname
));
2624 /* If the rest of the commands will be case insensitive, this one
2625 should behave in the same manner. */
2626 for (tem
= comname
; *tem
; tem
++)
2627 if (isupper(*tem
)) *tem
= tolower(*tem
);
2631 printf_unfiltered ("Type commands for definition of \"%s\".\n\
2632 End with a line saying just \"end\".\n", comname
);
2633 gdb_flush (gdb_stdout
);
2637 cmds
= read_command_lines ();
2639 if (c
&& c
->class == class_user
)
2640 free_command_lines (&c
->user_commands
);
2642 newc
= add_cmd (comname
, class_user
, user_defined_command
,
2643 (c
&& c
->class == class_user
)
2644 ? c
->doc
: savestring ("User-defined.", 13), &cmdlist
);
2645 newc
->user_commands
= cmds
;
2647 /* If this new command is a hook, then mark both commands as being
2651 hookc
->hook
= newc
; /* Target gets hooked. */
2652 newc
->hookee
= hookc
; /* We are marked as hooking target cmd. */
2657 document_command (comname
, from_tty
)
2661 struct command_line
*doclines
;
2662 register struct cmd_list_element
*c
;
2663 char *tem
= comname
;
2665 validate_comname (comname
);
2667 c
= lookup_cmd (&tem
, cmdlist
, "", 0, 1);
2669 if (c
->class != class_user
)
2670 error ("Command \"%s\" is built-in.", comname
);
2673 printf_unfiltered ("Type documentation for \"%s\".\n\
2674 End with a line saying just \"end\".\n", comname
);
2676 doclines
= read_command_lines ();
2678 if (c
->doc
) free (c
->doc
);
2681 register struct command_line
*cl1
;
2682 register int len
= 0;
2684 for (cl1
= doclines
; cl1
; cl1
= cl1
->next
)
2685 len
+= strlen (cl1
->line
) + 1;
2687 c
->doc
= (char *) xmalloc (len
+ 1);
2690 for (cl1
= doclines
; cl1
; cl1
= cl1
->next
)
2692 strcat (c
->doc
, cl1
->line
);
2694 strcat (c
->doc
, "\n");
2698 free_command_lines (&doclines
);
2702 print_gnu_advertisement ()
2704 printf_unfiltered ("\
2705 GDB is free software and you are welcome to distribute copies of it\n\
2706 under certain conditions; type \"show copying\" to see the conditions.\n\
2707 There is absolutely no warranty for GDB; type \"show warranty\" for details.\n\
2712 print_gdb_version (stream
)
2715 fprintf_filtered (stream
, "\
2716 GDB %s (%s", version
, host_name
);
2718 if (!STREQ (host_name
, target_name
))
2719 fprintf_filtered (stream
, " --target %s", target_name
);
2721 fprintf_filtered (stream
, "), ");
2723 fprintf_filtered (stream
, "Copyright 1996 Free Software Foundation, Inc.");
2728 show_version (args
, from_tty
)
2733 print_gnu_advertisement ();
2734 print_gdb_version (gdb_stdout
);
2735 printf_filtered ("\n");
2739 /* xgdb calls this to reprint the usual GDB prompt. Obsolete now that xgdb
2745 printf_unfiltered ("%s", prompt
);
2746 gdb_flush (gdb_stdout
);
2750 quit_command (args
, from_tty
)
2756 /* An optional expression may be used to cause gdb to terminate with the
2757 value of that expression. */
2760 value_ptr val
= parse_and_eval (args
);
2762 exit_code
= (int) value_as_long (val
);
2765 if (inferior_pid
!= 0 && target_has_execution
)
2769 if (query ("The program is running. Quit anyway (and detach it)? "))
2770 target_detach (args
, from_tty
);
2772 error ("Not confirmed.");
2776 if (query ("The program is running. Quit anyway (and kill it)? "))
2779 error ("Not confirmed.");
2782 /* UDI wants this, to kill the TIP. */
2785 /* Save the history information if it is appropriate to do so. */
2786 if (write_history_p
&& history_filename
)
2787 write_history (history_filename
);
2792 /* Returns whether GDB is running on a terminal and whether the user
2793 desires that questions be asked of them on that terminal. */
2796 input_from_terminal_p ()
2798 return gdb_has_a_terminal () && (instream
== stdin
) & caution
;
2803 pwd_command (args
, from_tty
)
2807 if (args
) error ("The \"pwd\" command does not take an argument: %s", args
);
2808 getcwd (gdb_dirbuf
, sizeof (gdb_dirbuf
));
2810 if (!STREQ (gdb_dirbuf
, current_directory
))
2811 printf_unfiltered ("Working directory %s\n (canonically %s).\n",
2812 current_directory
, gdb_dirbuf
);
2814 printf_unfiltered ("Working directory %s.\n", current_directory
);
2818 cd_command (dir
, from_tty
)
2823 /* Found something other than leading repetitions of "/..". */
2824 int found_real_path
;
2827 /* If the new directory is absolute, repeat is a no-op; if relative,
2828 repeat might be useful but is more likely to be a mistake. */
2832 error_no_arg ("new working directory");
2834 dir
= tilde_expand (dir
);
2835 make_cleanup (free
, dir
);
2837 if (chdir (dir
) < 0)
2838 perror_with_name (dir
);
2841 dir
= savestring (dir
, len
- (len
> 1 && SLASH_P(dir
[len
-1])));
2843 current_directory
= dir
;
2846 if (SLASH_P (current_directory
[0]) && current_directory
[1] == '\0')
2847 current_directory
= concat (current_directory
, dir
, NULL
);
2849 current_directory
= concat (current_directory
, SLASH_STRING
, dir
, NULL
);
2853 /* Now simplify any occurrences of `.' and `..' in the pathname. */
2855 found_real_path
= 0;
2856 for (p
= current_directory
; *p
;)
2858 if (SLASH_P (p
[0]) && p
[1] == '.' && (p
[2] == 0 || SLASH_P (p
[2])))
2860 else if (SLASH_P (p
[0]) && p
[1] == '.' && p
[2] == '.'
2861 && (p
[3] == 0 || SLASH_P (p
[3])))
2863 if (found_real_path
)
2865 /* Search backwards for the directory just before the "/.."
2866 and obliterate it and the "/..". */
2868 while (q
!= current_directory
&& ! SLASH_P (q
[-1]))
2871 if (q
== current_directory
)
2872 /* current_directory is
2873 a relative pathname ("can't happen"--leave it alone). */
2877 strcpy (q
- 1, p
+ 3);
2882 /* We are dealing with leading repetitions of "/..", for example
2883 "/../..", which is the Mach super-root. */
2888 found_real_path
= 1;
2893 forget_cached_source_info ();
2896 pwd_command ((char *) 0, 1);
2899 struct source_cleanup_lines_args
{
2902 char *old_pre_error
;
2903 char *old_error_pre_print
;
2907 source_cleanup_lines (args
)
2910 struct source_cleanup_lines_args
*p
=
2911 (struct source_cleanup_lines_args
*)args
;
2912 source_line_number
= p
->old_line
;
2913 source_file_name
= p
->old_file
;
2914 source_pre_error
= p
->old_pre_error
;
2915 error_pre_print
= p
->old_error_pre_print
;
2920 source_command (args
, from_tty
)
2925 struct cleanup
*old_cleanups
;
2927 struct source_cleanup_lines_args old_lines
;
2932 error ("source command requires pathname of file to source.");
2935 file
= tilde_expand (file
);
2936 old_cleanups
= make_cleanup (free
, file
);
2938 stream
= fopen (file
, FOPEN_RT
);
2940 perror_with_name (file
);
2942 make_cleanup (fclose
, stream
);
2944 old_lines
.old_line
= source_line_number
;
2945 old_lines
.old_file
= source_file_name
;
2946 old_lines
.old_pre_error
= source_pre_error
;
2947 old_lines
.old_error_pre_print
= error_pre_print
;
2948 make_cleanup (source_cleanup_lines
, &old_lines
);
2949 source_line_number
= 0;
2950 source_file_name
= file
;
2951 source_pre_error
= error_pre_print
== NULL
? "" : error_pre_print
;
2952 source_pre_error
= savestring (source_pre_error
, strlen (source_pre_error
));
2953 make_cleanup (free
, source_pre_error
);
2954 /* This will get set every time we read a line. So it won't stay "" for
2956 error_pre_print
= "";
2958 needed_length
= strlen (source_file_name
) + strlen (source_pre_error
) + 80;
2959 if (source_error_allocated
< needed_length
)
2961 source_error_allocated
*= 2;
2962 if (source_error_allocated
< needed_length
)
2963 source_error_allocated
= needed_length
;
2964 if (source_error
== NULL
)
2965 source_error
= xmalloc (source_error_allocated
);
2967 source_error
= xrealloc (source_error
, source_error_allocated
);
2970 read_command_file (stream
);
2972 do_cleanups (old_cleanups
);
2977 echo_command (text
, from_tty
)
2985 while ((c
= *p
++) != '\0')
2989 /* \ at end of argument is used after spaces
2990 so they won't be lost. */
2994 c
= parse_escape (&p
);
2996 printf_filtered ("%c", c
);
2999 printf_filtered ("%c", c
);
3002 /* Force this output to appear now. */
3004 gdb_flush (gdb_stdout
);
3009 dont_repeat_command (ignored
, from_tty
)
3013 *line
= 0; /* Can't call dont_repeat here because we're not
3014 necessarily reading from stdin. */
3017 #ifdef TARGET_BYTE_ORDER_SELECTABLE
3019 /* Functions to manipulate the endianness of the target. */
3021 #ifndef TARGET_BYTE_ORDER_DEFAULT
3022 #define TARGET_BYTE_ORDER_DEFAULT BIG_ENDIAN
3025 int target_byte_order
= TARGET_BYTE_ORDER_DEFAULT
;
3027 static int target_byte_order_auto
= 1;
3029 /* Called if the user enters ``set endian'' without an argument. */
3031 set_endian (args
, from_tty
)
3035 printf_unfiltered ("\"set endian\" must be followed by \"auto\", \"big\" or \"little\".\n");
3036 show_endian (args
, from_tty
);
3039 /* Called by ``set endian big''. */
3041 set_endian_big (args
, from_tty
)
3045 target_byte_order
= BIG_ENDIAN
;
3046 target_byte_order_auto
= 0;
3049 /* Called by ``set endian little''. */
3051 set_endian_little (args
, from_tty
)
3055 target_byte_order
= LITTLE_ENDIAN
;
3056 target_byte_order_auto
= 0;
3059 /* Called by ``set endian auto''. */
3061 set_endian_auto (args
, from_tty
)
3065 target_byte_order_auto
= 1;
3068 /* Called by ``show endian''. */
3070 show_endian (args
, from_tty
)
3075 (target_byte_order_auto
3076 ? "The target endianness is set automatically (currently %s endian)\n"
3077 : "The target is assumed to be %s endian\n");
3078 printf_unfiltered ((char *) msg
, TARGET_BYTE_ORDER
== BIG_ENDIAN
? "big" : "little");
3081 #endif /* defined (TARGET_BYTE_ORDER_SELECTABLE) */
3083 /* Set the endianness from a BFD. */
3085 set_endian_from_file (abfd
)
3088 #ifdef TARGET_BYTE_ORDER_SELECTABLE
3091 if (bfd_big_endian (abfd
))
3094 want
= LITTLE_ENDIAN
;
3095 if (target_byte_order_auto
)
3096 target_byte_order
= want
;
3097 else if (target_byte_order
!= want
)
3098 warning ("%s endian file does not match %s endian target.",
3099 want
== BIG_ENDIAN
? "big" : "little",
3100 TARGET_BYTE_ORDER
== BIG_ENDIAN
? "big" : "little");
3102 #else /* ! defined (TARGET_BYTE_ORDER_SELECTABLE) */
3104 if (bfd_big_endian (abfd
)
3105 ? TARGET_BYTE_ORDER
!= BIG_ENDIAN
3106 : TARGET_BYTE_ORDER
== BIG_ENDIAN
)
3107 warning ("%s endian file does not match %s endian target.",
3108 bfd_big_endian (abfd
) ? "big" : "little",
3109 TARGET_BYTE_ORDER
== BIG_ENDIAN
? "big" : "little");
3111 #endif /* ! defined (TARGET_BYTE_ORDER_SELECTABLE) */
3114 /* Functions to manipulate command line editing control variables. */
3116 /* Number of commands to print in each call to show_commands. */
3117 #define Hist_print 10
3119 show_commands (args
, from_tty
)
3123 /* Index for history commands. Relative to history_base. */
3126 /* Number of the history entry which we are planning to display next.
3127 Relative to history_base. */
3130 /* The first command in the history which doesn't exist (i.e. one more
3131 than the number of the last command). Relative to history_base. */
3134 extern HIST_ENTRY
*history_get
PARAMS ((int));
3136 /* Print out some of the commands from the command history. */
3137 /* First determine the length of the history list. */
3138 hist_len
= history_size
;
3139 for (offset
= 0; offset
< history_size
; offset
++)
3141 if (!history_get (history_base
+ offset
))
3150 if (args
[0] == '+' && args
[1] == '\0')
3151 /* "info editing +" should print from the stored position. */
3154 /* "info editing <exp>" should print around command number <exp>. */
3155 num
= (parse_and_eval_address (args
) - history_base
) - Hist_print
/ 2;
3157 /* "show commands" means print the last Hist_print commands. */
3160 num
= hist_len
- Hist_print
;
3166 /* If there are at least Hist_print commands, we want to display the last
3167 Hist_print rather than, say, the last 6. */
3168 if (hist_len
- num
< Hist_print
)
3170 num
= hist_len
- Hist_print
;
3175 for (offset
= num
; offset
< num
+ Hist_print
&& offset
< hist_len
; offset
++)
3177 printf_filtered ("%5d %s\n", history_base
+ offset
,
3178 (history_get (history_base
+ offset
))->line
);
3181 /* The next command we want to display is the next one that we haven't
3185 /* If the user repeats this command with return, it should do what
3186 "show commands +" does. This is unnecessary if arg is null,
3187 because "show commands +" is not useful after "show commands". */
3188 if (from_tty
&& args
)
3195 /* Called by do_setshow_command. */
3198 set_history_size_command (args
, from_tty
, c
)
3201 struct cmd_list_element
*c
;
3203 if (history_size
== INT_MAX
)
3204 unstifle_history ();
3205 else if (history_size
>= 0)
3206 stifle_history (history_size
);
3209 history_size
= INT_MAX
;
3210 error ("History size must be non-negative");
3216 set_history (args
, from_tty
)
3220 printf_unfiltered ("\"set history\" must be followed by the name of a history subcommand.\n");
3221 help_list (sethistlist
, "set history ", -1, gdb_stdout
);
3226 show_history (args
, from_tty
)
3230 cmd_show_list (showhistlist
, from_tty
, "");
3233 int info_verbose
= 0; /* Default verbose msgs off */
3235 /* Called by do_setshow_command. An elaborate joke. */
3238 set_verbose (args
, from_tty
, c
)
3241 struct cmd_list_element
*c
;
3243 char *cmdname
= "verbose";
3244 struct cmd_list_element
*showcmd
;
3246 showcmd
= lookup_cmd_1 (&cmdname
, showlist
, NULL
, 1);
3250 c
->doc
= "Set verbose printing of informational messages.";
3251 showcmd
->doc
= "Show verbose printing of informational messages.";
3255 c
->doc
= "Set verbosity.";
3256 showcmd
->doc
= "Show verbosity.";
3261 float_handler (signo
)
3264 /* This message is based on ANSI C, section 4.7. Note that integer
3265 divide by zero causes this, so "float" is a misnomer. */
3266 signal (SIGFPE
, float_handler
);
3267 error ("Erroneous arithmetic operation.");
3279 enablebreaklist
= NULL
;
3283 #ifdef TARGET_BYTE_ORDER_SELECTABLE
3287 showhistlist
= NULL
;
3288 unsethistlist
= NULL
;
3289 #if MAINTENANCE_CMDS
3290 maintenancelist
= NULL
;
3291 maintenanceinfolist
= NULL
;
3292 maintenanceprintlist
= NULL
;
3294 setprintlist
= NULL
;
3295 showprintlist
= NULL
;
3296 setchecklist
= NULL
;
3297 showchecklist
= NULL
;
3300 /* Init the history buffer. Note that we are called after the init file(s)
3301 * have been read so that the user can change the history file via his
3302 * .gdbinit file (for instance). The GDBHISTFILE environment variable
3303 * overrides all of this.
3311 tmpenv
= getenv ("HISTSIZE");
3313 history_size
= atoi (tmpenv
);
3314 else if (!history_size
)
3317 stifle_history (history_size
);
3319 tmpenv
= getenv ("GDBHISTFILE");
3321 history_filename
= savestring (tmpenv
, strlen(tmpenv
));
3322 else if (!history_filename
) {
3323 /* We include the current directory so that if the user changes
3324 directories the file written will be the same as the one
3326 history_filename
= concat (current_directory
, "/.gdb_history", NULL
);
3328 read_history (history_filename
);
3334 struct cmd_list_element
*c
;
3336 #ifdef TARGET_BYTE_ORDER_SELECTABLE
3338 add_prefix_cmd ("endian", class_support
, set_endian
,
3339 "Set endianness of target.",
3340 &endianlist
, "set endian ", 0, &setlist
);
3341 add_cmd ("big", class_support
, set_endian_big
,
3342 "Set target as being big endian.", &endianlist
);
3343 add_cmd ("little", class_support
, set_endian_little
,
3344 "Set target as being little endian.", &endianlist
);
3345 add_cmd ("auto", class_support
, set_endian_auto
,
3346 "Select target endianness automatically.", &endianlist
);
3347 add_cmd ("endian", class_support
, show_endian
,
3348 "Show endianness of target.", &showlist
);
3350 #endif /* defined (TARGET_BYTE_ORDER_SELECTABLE) */
3352 #ifdef DEFAULT_PROMPT
3353 prompt
= savestring (DEFAULT_PROMPT
, strlen(DEFAULT_PROMPT
));
3355 prompt
= savestring ("(gdb) ", 6);
3358 /* Set the important stuff up for command editing. */
3359 command_editing_p
= 1;
3360 history_expansion_p
= 0;
3361 write_history_p
= 0;
3363 /* Setup important stuff for command line editing. */
3364 rl_completion_entry_function
= (int (*)()) readline_line_completion_function
;
3365 rl_completer_word_break_characters
= gdb_completer_word_break_characters
;
3366 rl_completer_quote_characters
= gdb_completer_quote_characters
;
3367 rl_readline_name
= "gdb";
3369 /* Define the classes of commands.
3370 They will appear in the help list in the reverse of this order. */
3372 add_cmd ("internals", class_maintenance
, NO_FUNCTION
,
3373 "Maintenance commands.\n\
3374 Some gdb commands are provided just for use by gdb maintainers.\n\
3375 These commands are subject to frequent change, and may not be as\n\
3376 well documented as user commands.",
3378 add_cmd ("obscure", class_obscure
, NO_FUNCTION
, "Obscure features.", &cmdlist
);
3379 add_cmd ("aliases", class_alias
, NO_FUNCTION
, "Aliases of other commands.", &cmdlist
);
3380 add_cmd ("user-defined", class_user
, NO_FUNCTION
, "User-defined commands.\n\
3381 The commands in this class are those defined by the user.\n\
3382 Use the \"define\" command to define a command.", &cmdlist
);
3383 add_cmd ("support", class_support
, NO_FUNCTION
, "Support facilities.", &cmdlist
);
3384 add_cmd ("status", class_info
, NO_FUNCTION
, "Status inquiries.", &cmdlist
);
3385 add_cmd ("files", class_files
, NO_FUNCTION
, "Specifying and examining files.", &cmdlist
);
3386 add_cmd ("breakpoints", class_breakpoint
, NO_FUNCTION
, "Making program stop at certain points.", &cmdlist
);
3387 add_cmd ("data", class_vars
, NO_FUNCTION
, "Examining data.", &cmdlist
);
3388 add_cmd ("stack", class_stack
, NO_FUNCTION
, "Examining the stack.\n\
3389 The stack is made up of stack frames. Gdb assigns numbers to stack frames\n\
3390 counting from zero for the innermost (currently executing) frame.\n\n\
3391 At any time gdb identifies one frame as the \"selected\" frame.\n\
3392 Variable lookups are done with respect to the selected frame.\n\
3393 When the program being debugged stops, gdb selects the innermost frame.\n\
3394 The commands below can be used to select other frames by number or address.",
3396 add_cmd ("running", class_run
, NO_FUNCTION
, "Running the program.", &cmdlist
);
3398 add_com ("pwd", class_files
, pwd_command
,
3399 "Print working directory. This is used for your program as well.");
3400 c
= add_cmd ("cd", class_files
, cd_command
,
3401 "Set working directory to DIR for debugger and program being debugged.\n\
3402 The change does not take effect for the program being debugged\n\
3403 until the next time it is started.", &cmdlist
);
3404 c
->completer
= filename_completer
;
3407 (add_set_cmd ("prompt", class_support
, var_string
, (char *)&prompt
,
3412 add_com ("echo", class_support
, echo_command
,
3413 "Print a constant string. Give string as argument.\n\
3414 C escape sequences may be used in the argument.\n\
3415 No newline is added at the end of the argument;\n\
3416 use \"\\n\" if you want a newline to be printed.\n\
3417 Since leading and trailing whitespace are ignored in command arguments,\n\
3418 if you want to print some you must use \"\\\" before leading whitespace\n\
3419 to be printed or after trailing whitespace.");
3420 add_com ("document", class_support
, document_command
,
3421 "Document a user-defined command.\n\
3422 Give command name as argument. Give documentation on following lines.\n\
3423 End with a line of just \"end\".");
3424 add_com ("define", class_support
, define_command
,
3425 "Define a new command name. Command name is argument.\n\
3426 Definition appears on following lines, one command per line.\n\
3427 End with a line of just \"end\".\n\
3428 Use the \"document\" command to give documentation for the new command.\n\
3429 Commands defined in this way may have up to ten arguments.");
3432 c
= add_cmd ("source", class_support
, source_command
,
3433 "Read commands from a file named FILE.\n\
3434 Note that the file \"" GDBINIT_FILENAME
"\" is read automatically in this way\n\
3435 when gdb is started.", &cmdlist
);
3437 /* Punt file name, we can't help it easily. */
3438 c
= add_cmd ("source", class_support
, source_command
,
3439 "Read commands from a file named FILE.\n\
3440 Note that the file \".gdbinit\" is read automatically in this way\n\
3441 when gdb is started.", &cmdlist
);
3443 c
->completer
= filename_completer
;
3445 add_com ("quit", class_support
, quit_command
, "Exit gdb.");
3446 add_com ("help", class_support
, help_command
, "Print list of commands.");
3447 add_com_alias ("q", "quit", class_support
, 1);
3448 add_com_alias ("h", "help", class_support
, 1);
3450 add_com ("dont-repeat", class_support
, dont_repeat_command
, "Don't repeat this command.\n\
3451 Primarily used inside of user-defined commands that should not be repeated when\n\
3454 c
= add_set_cmd ("verbose", class_support
, var_boolean
, (char *)&info_verbose
,
3457 add_show_from_set (c
, &showlist
);
3458 c
->function
.sfunc
= set_verbose
;
3459 set_verbose (NULL
, 0, c
);
3462 (add_set_cmd ("editing", class_support
, var_boolean
, (char *)&command_editing_p
,
3463 "Set editing of command lines as they are typed.\n\
3464 Use \"on\" to enable to enable the editing, and \"off\" to disable it.\n\
3465 Without an argument, command line editing is enabled. To edit, use\n\
3466 EMACS-like or VI-like commands like control-P or ESC.", &setlist
),
3469 add_prefix_cmd ("history", class_support
, set_history
,
3470 "Generic command for setting command history parameters.",
3471 &sethistlist
, "set history ", 0, &setlist
);
3472 add_prefix_cmd ("history", class_support
, show_history
,
3473 "Generic command for showing command history parameters.",
3474 &showhistlist
, "show history ", 0, &showlist
);
3477 (add_set_cmd ("expansion", no_class
, var_boolean
, (char *)&history_expansion_p
,
3478 "Set history expansion on command input.\n\
3479 Without an argument, history expansion is enabled.", &sethistlist
),
3483 (add_set_cmd ("save", no_class
, var_boolean
, (char *)&write_history_p
,
3484 "Set saving of the history record on exit.\n\
3485 Use \"on\" to enable to enable the saving, and \"off\" to disable it.\n\
3486 Without an argument, saving is enabled.", &sethistlist
),
3489 c
= add_set_cmd ("size", no_class
, var_integer
, (char *)&history_size
,
3490 "Set the size of the command history, \n\
3491 ie. the number of previous commands to keep a record of.", &sethistlist
);
3492 add_show_from_set (c
, &showhistlist
);
3493 c
->function
.sfunc
= set_history_size_command
;
3496 (add_set_cmd ("filename", no_class
, var_filename
, (char *)&history_filename
,
3497 "Set the filename in which to record the command history\n\
3498 (the list of previous commands of which a record is kept).", &sethistlist
),
3502 (add_set_cmd ("confirm", class_support
, var_boolean
,
3504 "Set whether to confirm potentially dangerous operations.",
3508 add_prefix_cmd ("info", class_info
, info_command
,
3509 "Generic command for showing things about the program being debugged.",
3510 &infolist
, "info ", 0, &cmdlist
);
3511 add_com_alias ("i", "info", class_info
, 1);
3513 add_com ("complete", class_obscure
, complete_command
,
3514 "List the completions for the rest of the line as a command.");
3516 add_prefix_cmd ("show", class_info
, show_command
,
3517 "Generic command for showing things about the debugger.",
3518 &showlist
, "show ", 0, &cmdlist
);
3519 /* Another way to get at the same thing. */
3520 add_info ("set", show_command
, "Show all GDB settings.");
3522 add_cmd ("commands", no_class
, show_commands
,
3523 "Show the history of commands you typed.\n\
3524 You can supply a command number to start with, or a `+' to start after\n\
3525 the previous command number shown.",
3528 add_cmd ("version", no_class
, show_version
,
3529 "Show what version of GDB this is.", &showlist
);
3531 add_com ("while", class_support
, while_command
,
3532 "Execute nested commands WHILE the conditional expression is non zero.\n\
3533 The conditional expression must follow the word `while' and must in turn be\n\
3534 followed by a new line. The nested commands must be entered one per line,\n\
3535 and should be terminated by the word `end'.");
3537 add_com ("if", class_support
, if_command
,
3538 "Execute nested commands once IF the conditional expression is non zero.\n\
3539 The conditional expression must follow the word `if' and must in turn be\n\
3540 followed by a new line. The nested commands must be entered one per line,\n\
3541 and should be terminated by the word 'else' or `end'. If an else clause\n\
3542 is used, the same rules apply to its nested commands as to the first ones.");
3544 /* If target is open when baud changes, it doesn't take effect until the
3545 next open (I think, not sure). */
3546 add_show_from_set (add_set_cmd ("remotebaud", no_class
,
3547 var_zinteger
, (char *)&baud_rate
,
3548 "Set baud rate for remote serial I/O.\n\
3549 This value is used to set the speed of the serial port when debugging\n\
3550 using remote targets.", &setlist
),
3554 add_set_cmd ("remotedebug", no_class
, var_zinteger
, (char *)&remote_debug
,
3555 "Set debugging of remote protocol.\n\
3556 When enabled, each packet sent or received with the remote target\n\
3557 is displayed.", &setlist
),