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. */
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;
1142 extern FILE *serial_logfp
;
1146 /* This can happen when command_line_input hits end of file. */
1150 if (serial_logfp
!= NULL
)
1151 serial_log_command (p
);
1153 while (*p
== ' ' || *p
== '\t') p
++;
1158 c
= lookup_cmd (&p
, cmdlist
, "", 0, 1);
1159 /* Pass null arg rather than an empty one. */
1162 /* Clear off trailing whitespace, except for set and complete command. */
1163 if (arg
&& c
->type
!= set_cmd
&& c
->function
.cfunc
!= complete_command
)
1165 p
= arg
+ strlen (arg
) - 1;
1166 while (p
>= arg
&& (*p
== ' ' || *p
== '\t'))
1171 /* If this command has been hooked, run the hook first. */
1173 execute_user_command (c
->hook
, (char *)0);
1175 if (c
->class == class_user
)
1176 execute_user_command (c
, arg
);
1177 else if (c
->type
== set_cmd
|| c
->type
== show_cmd
)
1178 do_setshow_command (arg
, from_tty
& caution
, c
);
1179 else if (c
->function
.cfunc
== NO_FUNCTION
)
1180 error ("That is not a command, just a help topic.");
1181 else if (call_command_hook
)
1182 call_command_hook (c
, arg
, from_tty
& caution
);
1184 (*c
->function
.cfunc
) (arg
, from_tty
& caution
);
1187 /* Tell the user if the language has changed (except first time). */
1188 if (current_language
!= expected_language
)
1190 if (language_mode
== language_mode_auto
) {
1191 language_info (1); /* Print what changed. */
1196 /* Warn the user if the working language does not match the
1197 language of the current frame. Only warn the user if we are
1198 actually running the program, i.e. there is a stack. */
1199 /* FIXME: This should be cacheing the frame and only running when
1200 the frame changes. */
1202 if (target_has_stack
)
1204 flang
= get_frame_language ();
1206 && flang
!= language_unknown
1207 && flang
!= current_language
->la_language
)
1209 printf_filtered ("%s\n", lang_frame_mismatch_warn
);
1217 command_loop_marker (foo
)
1222 /* Read commands from `instream' and execute them
1223 until end of file or error reading instream. */
1228 struct cleanup
*old_chain
;
1230 int stdin_is_tty
= ISATTY (stdin
);
1231 long time_at_cmd_start
;
1232 long space_at_cmd_start
;
1233 extern int display_time
;
1234 extern int display_space
;
1236 while (!feof (instream
))
1238 if (window_hook
&& instream
== stdin
)
1239 (*window_hook
) (instream
, prompt
);
1242 if (instream
== stdin
&& stdin_is_tty
)
1243 reinitialize_more_filter ();
1244 old_chain
= make_cleanup (command_loop_marker
, 0);
1245 command
= command_line_input (instream
== stdin
? prompt
: (char *) NULL
,
1246 instream
== stdin
, "prompt");
1250 time_at_cmd_start
= get_run_time ();
1254 extern char **environ
;
1255 char *lim
= (char *) sbrk (0);
1257 space_at_cmd_start
= (long) (lim
- (char *) &environ
);
1260 execute_command (command
, instream
== stdin
);
1261 /* Do any commands attached to breakpoint we stopped at. */
1262 bpstat_do_actions (&stop_bpstat
);
1263 do_cleanups (old_chain
);
1267 long cmd_time
= get_run_time () - time_at_cmd_start
;
1269 printf_unfiltered ("Command execution time: %ld.%06ld\n",
1270 cmd_time
/ 1000000, cmd_time
% 1000000);
1275 extern char **environ
;
1276 char *lim
= (char *) sbrk (0);
1277 long space_now
= lim
- (char *) &environ
;
1278 long space_diff
= space_now
- space_at_cmd_start
;
1280 printf_unfiltered ("Space used: %ld (%c%ld for this command)\n",
1282 (space_diff
>= 0 ? '+' : '-'),
1288 /* Commands call this if they do not want to be repeated by null lines. */
1296 /* If we aren't reading from standard input, we are saving the last
1297 thing read from stdin in line and don't want to delete it. Null lines
1298 won't repeat here in any case. */
1299 if (instream
== stdin
)
1303 /* Read a line from the stream "instream" without command line editing.
1305 It prints PRROMPT once at the start.
1306 Action is compatible with "readline", e.g. space for the result is
1307 malloc'd and should be freed by the caller.
1309 A NULL return means end of file. */
1311 gdb_readline (prrompt
)
1316 int input_index
= 0;
1317 int result_size
= 80;
1321 /* Don't use a _filtered function here. It causes the assumed
1322 character position to be off, since the newline we read from
1323 the user is not accounted for. */
1324 fputs_unfiltered (prrompt
, gdb_stdout
);
1326 /* Move to a new line so the entered line doesn't have a prompt
1327 on the front of it. */
1328 fputs_unfiltered ("\n", gdb_stdout
);
1330 gdb_flush (gdb_stdout
);
1333 result
= (char *) xmalloc (result_size
);
1337 /* Read from stdin if we are executing a user defined command.
1338 This is the right thing for prompt_for_continue, at least. */
1339 c
= fgetc (instream
? instream
: stdin
);
1343 if (input_index
> 0)
1344 /* The last line does not end with a newline. Return it, and
1345 if we are called again fgetc will still return EOF and
1346 we'll return NULL then. */
1355 result
[input_index
++] = c
;
1356 while (input_index
>= result_size
)
1359 result
= (char *) xrealloc (result
, result_size
);
1363 result
[input_index
++] = '\0';
1367 /* Variables which control command line editing and history
1368 substitution. These variables are given default values at the end
1370 static int command_editing_p
;
1371 static int history_expansion_p
;
1372 static int write_history_p
;
1373 static int history_size
;
1374 static char *history_filename
;
1376 /* readline uses the word breaks for two things:
1377 (1) In figuring out where to point the TEXT parameter to the
1378 rl_completion_entry_function. Since we don't use TEXT for much,
1379 it doesn't matter a lot what the word breaks are for this purpose, but
1380 it does affect how much stuff M-? lists.
1381 (2) If one of the matches contains a word break character, readline
1382 will quote it. That's why we switch between
1383 gdb_completer_word_break_characters and
1384 gdb_completer_command_word_break_characters. I'm not sure when
1385 we need this behavior (perhaps for funky characters in C++ symbols?). */
1387 /* Variables which are necessary for fancy command line editing. */
1388 char *gdb_completer_word_break_characters
=
1389 " \t\n!@#$%^&*()+=|~`}{[]\"';:?/>.<,-";
1391 /* When completing on command names, we remove '-' from the list of
1392 word break characters, since we use it in command names. If the
1393 readline library sees one in any of the current completion strings,
1394 it thinks that the string needs to be quoted and automatically supplies
1396 char *gdb_completer_command_word_break_characters
=
1397 " \t\n!@#$%^&*()+=|~`}{[]\"';:?/>.<,";
1399 /* Characters that can be used to quote completion strings. Note that we
1400 can't include '"' because the gdb C parser treats such quoted sequences
1402 char *gdb_completer_quote_characters
=
1405 /* Functions that are used as part of the fancy command line editing. */
1407 /* This can be used for functions which don't want to complete on symbols
1408 but don't want to complete on anything else either. */
1411 noop_completer (text
, prefix
)
1418 /* Complete on filenames. */
1420 filename_completer (text
, word
)
1424 /* From readline. */
1425 extern char *filename_completion_function ();
1426 int subsequent_name
;
1428 int return_val_used
;
1429 int return_val_alloced
;
1431 return_val_used
= 0;
1432 /* Small for testing. */
1433 return_val_alloced
= 1;
1434 return_val
= (char **) xmalloc (return_val_alloced
* sizeof (char *));
1436 subsequent_name
= 0;
1440 p
= filename_completion_function (text
, subsequent_name
);
1441 if (return_val_used
>= return_val_alloced
)
1443 return_val_alloced
*= 2;
1445 (char **) xrealloc (return_val
,
1446 return_val_alloced
* sizeof (char *));
1450 return_val
[return_val_used
++] = p
;
1453 /* Like emacs, don't complete on old versions. Especially useful
1454 in the "source" command. */
1455 if (p
[strlen (p
) - 1] == '~')
1461 /* Return exactly p. */
1462 return_val
[return_val_used
++] = p
;
1463 else if (word
> text
)
1465 /* Return some portion of p. */
1466 q
= xmalloc (strlen (p
) + 5);
1467 strcpy (q
, p
+ (word
- text
));
1468 return_val
[return_val_used
++] = q
;
1473 /* Return some of TEXT plus p. */
1474 q
= xmalloc (strlen (p
) + (text
- word
) + 5);
1475 strncpy (q
, word
, text
- word
);
1476 q
[text
- word
] = '\0';
1478 return_val
[return_val_used
++] = q
;
1482 subsequent_name
= 1;
1485 /* There is no way to do this just long enough to affect quote inserting
1486 without also affecting the next completion. This should be fixed in
1488 /* Insure that readline does the right thing
1489 with respect to inserting quotes. */
1490 rl_completer_word_break_characters
= "";
1495 /* Here are some useful test cases for completion. FIXME: These should
1496 be put in the test suite. They should be tested with both M-? and TAB.
1498 "show output-" "radix"
1499 "show output" "-radix"
1500 "p" ambiguous (commands starting with p--path, print, printf, etc.)
1501 "p " ambiguous (all symbols)
1502 "info t foo" no completions
1503 "info t " no completions
1504 "info t" ambiguous ("info target", "info terminal", etc.)
1505 "info ajksdlfk" no completions
1506 "info ajksdlfk " no completions
1508 "info " ambiguous (all info commands)
1509 "p \"a" no completions (string constant)
1510 "p 'a" ambiguous (all symbols starting with a)
1511 "p b-a" ambiguous (all symbols starting with a)
1512 "p b-" ambiguous (all symbols)
1513 "file Make" "file" (word break hard to screw up here)
1514 "file ../gdb.stabs/we" "ird" (needs to not break word at slash)
1517 /* Generate completions one by one for the completer. Each time we are
1518 called return another potential completion to the caller.
1519 line_completion just completes on commands or passes the buck to the
1520 command's completer function, the stuff specific to symbol completion
1521 is in make_symbol_completion_list.
1523 TEXT is the caller's idea of the "word" we are looking at.
1525 MATCHES is the number of matches that have currently been collected from
1526 calling this completion function. When zero, then we need to initialize,
1527 otherwise the initialization has already taken place and we can just
1528 return the next potential completion string.
1530 LINE_BUFFER is available to be looked at; it contains the entire text
1531 of the line. POINT is the offset in that line of the cursor. You
1532 should pretend that the line ends at POINT.
1534 Returns NULL if there are no more completions, else a pointer to a string
1535 which is a possible completion, it is the caller's responsibility to
1539 line_completion_function (text
, matches
, line_buffer
, point
)
1545 static char **list
= (char **)NULL
; /* Cache of completions */
1546 static int index
; /* Next cached completion */
1547 char *output
= NULL
;
1548 char *tmp_command
, *p
;
1549 /* Pointer within tmp_command which corresponds to text. */
1551 struct cmd_list_element
*c
, *result_list
;
1555 /* The caller is beginning to accumulate a new set of completions, so
1556 we need to find all of them now, and cache them for returning one at
1557 a time on future calls. */
1561 /* Free the storage used by LIST, but not by the strings inside.
1562 This is because rl_complete_internal () frees the strings. */
1568 /* Choose the default set of word break characters to break completions.
1569 If we later find out that we are doing completions on command strings
1570 (as opposed to strings supplied by the individual command completer
1571 functions, which can be any string) then we will switch to the
1572 special word break set for command strings, which leaves out the
1573 '-' character used in some commands. */
1575 rl_completer_word_break_characters
=
1576 gdb_completer_word_break_characters
;
1578 /* Decide whether to complete on a list of gdb commands or on symbols. */
1579 tmp_command
= (char *) alloca (point
+ 1);
1582 strncpy (tmp_command
, line_buffer
, point
);
1583 tmp_command
[point
] = '\0';
1584 /* Since text always contains some number of characters leading up
1585 to point, we can find the equivalent position in tmp_command
1586 by subtracting that many characters from the end of tmp_command. */
1587 word
= tmp_command
+ point
- strlen (text
);
1591 /* An empty line we want to consider ambiguous; that is, it
1592 could be any command. */
1593 c
= (struct cmd_list_element
*) -1;
1598 c
= lookup_cmd_1 (&p
, cmdlist
, &result_list
, 1);
1601 /* Move p up to the next interesting thing. */
1602 while (*p
== ' ' || *p
== '\t')
1609 /* It is an unrecognized command. So there are no
1610 possible completions. */
1613 else if (c
== (struct cmd_list_element
*) -1)
1617 /* lookup_cmd_1 advances p up to the first ambiguous thing, but
1618 doesn't advance over that thing itself. Do so now. */
1620 while (*q
&& (isalnum (*q
) || *q
== '-' || *q
== '_'))
1622 if (q
!= tmp_command
+ point
)
1624 /* There is something beyond the ambiguous
1625 command, so there are no possible completions. For
1626 example, "info t " or "info t foo" does not complete
1627 to anything, because "info t" can be "info target" or
1633 /* We're trying to complete on the command which was ambiguous.
1634 This we can deal with. */
1637 list
= complete_on_cmdlist (*result_list
->prefixlist
, p
,
1642 list
= complete_on_cmdlist (cmdlist
, p
, word
);
1644 /* Insure that readline does the right thing with respect to
1645 inserting quotes. */
1646 rl_completer_word_break_characters
=
1647 gdb_completer_command_word_break_characters
;
1652 /* We've recognized a full command. */
1654 if (p
== tmp_command
+ point
)
1656 /* There is no non-whitespace in the line beyond the command. */
1658 if (p
[-1] == ' ' || p
[-1] == '\t')
1660 /* The command is followed by whitespace; we need to complete
1661 on whatever comes after command. */
1664 /* It is a prefix command; what comes after it is
1665 a subcommand (e.g. "info "). */
1666 list
= complete_on_cmdlist (*c
->prefixlist
, p
, word
);
1668 /* Insure that readline does the right thing
1669 with respect to inserting quotes. */
1670 rl_completer_word_break_characters
=
1671 gdb_completer_command_word_break_characters
;
1675 list
= complete_on_enum (c
->enums
, p
, word
);
1676 rl_completer_word_break_characters
=
1677 gdb_completer_command_word_break_characters
;
1681 /* It is a normal command; what comes after it is
1682 completed by the command's completer function. */
1683 list
= (*c
->completer
) (p
, word
);
1688 /* The command is not followed by whitespace; we need to
1689 complete on the command itself. e.g. "p" which is a
1690 command itself but also can complete to "print", "ptype"
1694 /* Find the command we are completing on. */
1696 while (q
> tmp_command
)
1698 if (isalnum (q
[-1]) || q
[-1] == '-' || q
[-1] == '_')
1704 list
= complete_on_cmdlist (result_list
, q
, word
);
1706 /* Insure that readline does the right thing
1707 with respect to inserting quotes. */
1708 rl_completer_word_break_characters
=
1709 gdb_completer_command_word_break_characters
;
1714 /* There is non-whitespace beyond the command. */
1716 if (c
->prefixlist
&& !c
->allow_unknown
)
1718 /* It is an unrecognized subcommand of a prefix command,
1719 e.g. "info adsfkdj". */
1724 list
= complete_on_enum (c
->enums
, p
, word
);
1728 /* It is a normal command. */
1729 list
= (*c
->completer
) (p
, word
);
1735 /* If we found a list of potential completions during initialization then
1736 dole them out one at a time. The vector of completions is NULL
1737 terminated, so after returning the last one, return NULL (and continue
1738 to do so) each time we are called after that, until a new list is
1743 output
= list
[index
];
1751 /* Can't do this because readline hasn't yet checked the word breaks
1752 for figuring out whether to insert a quote. */
1754 /* Make sure the word break characters are set back to normal for the
1755 next time that readline tries to complete something. */
1756 rl_completer_word_break_characters
=
1757 gdb_completer_word_break_characters
;
1763 /* Line completion interface function for readline. */
1766 readline_line_completion_function (text
, matches
)
1770 return line_completion_function (text
, matches
, rl_line_buffer
, rl_point
);
1773 /* Skip over a possibly quoted word (as defined by the quote characters
1774 and word break characters the completer uses). Returns pointer to the
1775 location after the "word". */
1781 char quote_char
= '\0';
1784 for (scan
= str
; *scan
!= '\0'; scan
++)
1786 if (quote_char
!= '\0')
1788 /* Ignore everything until the matching close quote char */
1789 if (*scan
== quote_char
)
1791 /* Found matching close quote. */
1796 else if (strchr (gdb_completer_quote_characters
, *scan
))
1798 /* Found start of a quoted string. */
1801 else if (strchr (gdb_completer_word_break_characters
, *scan
))
1815 #if STOP_SIGNAL == SIGTSTP
1816 signal (SIGTSTP
, SIG_DFL
);
1818 kill (getpid (), SIGTSTP
);
1819 signal (SIGTSTP
, stop_sig
);
1821 signal (STOP_SIGNAL
, stop_sig
);
1823 printf_unfiltered ("%s", prompt
);
1824 gdb_flush (gdb_stdout
);
1826 /* Forget about any previous command -- null line now will do nothing. */
1829 #endif /* STOP_SIGNAL */
1831 /* Initialize signal handlers. */
1841 signal (SIGINT
, request_quit
);
1843 /* If SIGTRAP was set to SIG_IGN, then the SIG_IGN will get passed
1844 to the inferior and breakpoints will be ignored. */
1846 signal (SIGTRAP
, SIG_DFL
);
1849 /* If we initialize SIGQUIT to SIG_IGN, then the SIG_IGN will get
1850 passed to the inferior, which we don't want. It would be
1851 possible to do a "signal (SIGQUIT, SIG_DFL)" after we fork, but
1852 on BSD4.3 systems using vfork, that can affect the
1853 GDB process as well as the inferior (the signal handling tables
1854 might be in memory, shared between the two). Since we establish
1855 a handler for SIGQUIT, when we call exec it will set the signal
1856 to SIG_DFL for us. */
1857 signal (SIGQUIT
, do_nothing
);
1858 if (signal (SIGHUP
, do_nothing
) != SIG_IGN
)
1859 signal (SIGHUP
, disconnect
);
1860 signal (SIGFPE
, float_handler
);
1862 #if defined(SIGWINCH) && defined(SIGWINCH_HANDLER)
1863 signal (SIGWINCH
, SIGWINCH_HANDLER
);
1867 /* Read one line from the command input stream `instream'
1868 into the local static buffer `linebuffer' (whose current length
1870 The buffer is made bigger as necessary.
1871 Returns the address of the start of the line.
1873 NULL is returned for end of file.
1875 *If* the instream == stdin & stdin is a terminal, the line read
1876 is copied into the file line saver (global var char *line,
1877 length linesize) so that it can be duplicated.
1879 This routine either uses fancy command line editing or
1880 simple input as the user has requested. */
1883 command_line_input (prrompt
, repeat
, annotation_suffix
)
1886 char *annotation_suffix
;
1888 static char *linebuffer
= 0;
1889 static unsigned linelength
= 0;
1893 char *local_prompt
= prrompt
;
1897 /* The annotation suffix must be non-NULL. */
1898 if (annotation_suffix
== NULL
)
1899 annotation_suffix
= "";
1901 if (annotation_level
> 1 && instream
== stdin
)
1903 local_prompt
= alloca ((prrompt
== NULL
? 0 : strlen (prrompt
))
1904 + strlen (annotation_suffix
) + 40);
1905 if (prrompt
== NULL
)
1906 local_prompt
[0] = '\0';
1908 strcpy (local_prompt
, prrompt
);
1909 strcat (local_prompt
, "\n\032\032");
1910 strcat (local_prompt
, annotation_suffix
);
1911 strcat (local_prompt
, "\n");
1914 if (linebuffer
== 0)
1917 linebuffer
= (char *) xmalloc (linelength
);
1922 /* Control-C quits instantly if typed while in this loop
1923 since it should not wait until the user types a newline. */
1927 signal (STOP_SIGNAL
, stop_sig
);
1932 /* Make sure that all output has been output. Some machines may let
1933 you get away with leaving out some of the gdb_flush, but not all. */
1935 gdb_flush (gdb_stdout
);
1936 gdb_flush (gdb_stderr
);
1938 if (source_file_name
!= NULL
)
1940 ++source_line_number
;
1941 sprintf (source_error
,
1942 "%s%s:%d: Error in sourced command file:\n",
1945 source_line_number
);
1946 error_pre_print
= source_error
;
1949 if (annotation_level
> 1 && instream
== stdin
)
1951 printf_unfiltered ("\n\032\032pre-");
1952 printf_unfiltered (annotation_suffix
);
1953 printf_unfiltered ("\n");
1956 /* Don't use fancy stuff if not talking to stdin. */
1957 if (command_editing_p
&& instream
== stdin
1958 && ISATTY (instream
))
1959 rl
= readline (local_prompt
);
1961 rl
= gdb_readline (local_prompt
);
1963 if (annotation_level
> 1 && instream
== stdin
)
1965 printf_unfiltered ("\n\032\032post-");
1966 printf_unfiltered (annotation_suffix
);
1967 printf_unfiltered ("\n");
1970 if (!rl
|| rl
== (char *) EOF
)
1975 if (strlen(rl
) + 1 + (p
- linebuffer
) > linelength
)
1977 linelength
= strlen(rl
) + 1 + (p
- linebuffer
);
1978 nline
= (char *) xrealloc (linebuffer
, linelength
);
1979 p
+= nline
- linebuffer
;
1983 /* Copy line. Don't copy null at end. (Leaves line alone
1984 if this was just a newline) */
1988 free (rl
); /* Allocated in readline. */
1990 if (p
== linebuffer
|| *(p
- 1) != '\\')
1993 p
--; /* Put on top of '\'. */
1994 local_prompt
= (char *) 0;
1999 signal (STOP_SIGNAL
, SIG_DFL
);
2006 #define SERVER_COMMAND_LENGTH 7
2008 (p
- linebuffer
> SERVER_COMMAND_LENGTH
)
2009 && STREQN (linebuffer
, "server ", SERVER_COMMAND_LENGTH
);
2012 /* Note that we don't set `line'. Between this and the check in
2013 dont_repeat, this insures that repeating will still do the
2016 return linebuffer
+ SERVER_COMMAND_LENGTH
;
2019 /* Do history expansion if that is wished. */
2020 if (history_expansion_p
&& instream
== stdin
2021 && ISATTY (instream
))
2023 char *history_value
;
2026 *p
= '\0'; /* Insert null now. */
2027 expanded
= history_expand (linebuffer
, &history_value
);
2030 /* Print the changes. */
2031 printf_unfiltered ("%s\n", history_value
);
2033 /* If there was an error, call this function again. */
2036 free (history_value
);
2037 return command_line_input (prrompt
, repeat
, annotation_suffix
);
2039 if (strlen (history_value
) > linelength
)
2041 linelength
= strlen (history_value
) + 1;
2042 linebuffer
= (char *) xrealloc (linebuffer
, linelength
);
2044 strcpy (linebuffer
, history_value
);
2045 p
= linebuffer
+ strlen(linebuffer
);
2046 free (history_value
);
2050 /* If we just got an empty line, and that is supposed
2051 to repeat the previous command, return the value in the
2053 if (repeat
&& p
== linebuffer
)
2055 for (p1
= linebuffer
; *p1
== ' ' || *p1
== '\t'; p1
++) ;
2061 /* Add line to history if appropriate. */
2062 if (instream
== stdin
2063 && ISATTY (stdin
) && *linebuffer
)
2064 add_history (linebuffer
);
2066 /* Note: lines consisting solely of comments are added to the command
2067 history. This is useful when you type a command, and then
2068 realize you don't want to execute it quite yet. You can comment
2069 out the command and then later fetch it from the value history
2070 and remove the '#'. The kill ring is probably better, but some
2071 people are in the habit of commenting things out. */
2073 *p1
= '\0'; /* Found a comment. */
2075 /* Save into global buffer if appropriate. */
2078 if (linelength
> linesize
)
2080 line
= xrealloc (line
, linelength
);
2081 linesize
= linelength
;
2083 strcpy (line
, linebuffer
);
2091 /* Expand the body_list of COMMAND so that it can hold NEW_LENGTH
2092 code bodies. This is typically used when we encounter an "else"
2093 clause for an "if" command. */
2096 realloc_body_list (command
, new_length
)
2097 struct command_line
*command
;
2101 struct command_line
**body_list
;
2103 n
= command
->body_count
;
2105 /* Nothing to do? */
2106 if (new_length
<= n
)
2109 body_list
= (struct command_line
**)
2110 xmalloc (sizeof (struct command_line
*) * new_length
);
2112 memcpy (body_list
, command
->body_list
, sizeof (struct command_line
*) * n
);
2114 free (command
->body_list
);
2115 command
->body_list
= body_list
;
2116 command
->body_count
= new_length
;
2119 /* Read one line from the input stream. If the command is an "else" or
2120 "end", return such an indication to the caller. */
2122 static enum misc_command_type
2123 read_next_line (command
)
2124 struct command_line
**command
;
2126 char *p
, *p1
, *prompt_ptr
, control_prompt
[256];
2129 if (control_level
>= 254)
2130 error ("Control nesting too deep!\n");
2132 /* Set a prompt based on the nesting of the control commands. */
2133 if (instream
== stdin
)
2135 for (i
= 0; i
< control_level
; i
++)
2136 control_prompt
[i
] = ' ';
2137 control_prompt
[i
] = '>';
2138 control_prompt
[i
+1] = '\0';
2139 prompt_ptr
= (char *)&control_prompt
[0];
2144 p
= command_line_input (prompt_ptr
, instream
== stdin
, "commands");
2146 /* Not sure what to do here. */
2150 /* Strip leading and trailing whitespace. */
2151 while (*p
== ' ' || *p
== '\t')
2154 p1
= p
+ strlen (p
);
2155 while (p1
!= p
&& (p1
[-1] == ' ' || p1
[-1] == '\t'))
2158 /* Blanks and comments don't really do anything, but we need to
2159 distinguish them from else, end and other commands which can be
2161 if (p1
== p
|| p
[0] == '#')
2164 /* Is this the end of a simple, while, or if control structure? */
2165 if (p1
- p
== 3 && !strncmp (p
, "end", 3))
2168 /* Is the else clause of an if control structure? */
2169 if (p1
- p
== 4 && !strncmp (p
, "else", 4))
2170 return else_command
;
2172 /* Check for while, if, break, continue, etc and build a new command
2173 line structure for them. */
2174 if (p1
- p
> 5 && !strncmp (p
, "while", 5))
2175 *command
= build_command_line (while_control
, p
+ 6);
2176 else if (p1
- p
> 2 && !strncmp (p
, "if", 2))
2177 *command
= build_command_line (if_control
, p
+ 3);
2178 else if (p1
- p
== 5 && !strncmp (p
, "loop_break", 5))
2180 *command
= (struct command_line
*)
2181 xmalloc (sizeof (struct command_line
));
2182 (*command
)->next
= NULL
;
2183 (*command
)->line
= NULL
;
2184 (*command
)->control_type
= break_control
;
2185 (*command
)->body_count
= 0;
2186 (*command
)->body_list
= NULL
;
2188 else if (p1
- p
== 8 && !strncmp (p
, "loop_continue", 8))
2190 *command
= (struct command_line
*)
2191 xmalloc (sizeof (struct command_line
));
2192 (*command
)->next
= NULL
;
2193 (*command
)->line
= NULL
;
2194 (*command
)->control_type
= continue_control
;
2195 (*command
)->body_count
= 0;
2196 (*command
)->body_list
= NULL
;
2200 /* A normal command. */
2201 *command
= (struct command_line
*)
2202 xmalloc (sizeof (struct command_line
));
2203 (*command
)->next
= NULL
;
2204 (*command
)->line
= savestring (p
, p1
- p
);
2205 (*command
)->control_type
= simple_control
;
2206 (*command
)->body_count
= 0;
2207 (*command
)->body_list
= NULL
;
2210 /* Nothing special. */
2214 /* Recursively read in the control structures and create a command_line
2217 The parent_control parameter is the control structure in which the
2218 following commands are nested. */
2220 static enum command_control_type
2221 recurse_read_control_structure (current_cmd
)
2222 struct command_line
*current_cmd
;
2224 int current_body
, i
;
2225 enum misc_command_type val
;
2226 enum command_control_type ret
;
2227 struct command_line
**body_ptr
, *child_tail
, *next
;
2232 /* Sanity checks. */
2233 if (current_cmd
->control_type
== simple_control
)
2235 error ("Recursed on a simple control type\n");
2236 return invalid_control
;
2239 if (current_body
> current_cmd
->body_count
)
2241 error ("Allocated body is smaller than this command type needs\n");
2242 return invalid_control
;
2245 /* Read lines from the input stream and build control structures. */
2251 val
= read_next_line (&next
);
2253 /* Just skip blanks and comments. */
2254 if (val
== nop_command
)
2257 if (val
== end_command
)
2259 if (current_cmd
->control_type
== while_control
2260 || current_cmd
->control_type
== if_control
)
2262 /* Success reading an entire control structure. */
2263 ret
= simple_control
;
2268 ret
= invalid_control
;
2273 /* Not the end of a control structure. */
2274 if (val
== else_command
)
2276 if (current_cmd
->control_type
== if_control
2277 && current_body
== 1)
2279 realloc_body_list (current_cmd
, 2);
2286 ret
= invalid_control
;
2293 child_tail
->next
= next
;
2297 body_ptr
= current_cmd
->body_list
;
2298 for (i
= 1; i
< current_body
; i
++)
2307 /* If the latest line is another control structure, then recurse
2309 if (next
->control_type
== while_control
2310 || next
->control_type
== if_control
)
2313 ret
= recurse_read_control_structure (next
);
2316 if (ret
!= simple_control
)
2327 /* Read lines from the input stream
2328 and accumulate them in a chain of struct command_line's
2329 which is then returned. */
2331 struct command_line
*
2332 read_command_lines ()
2334 struct command_line
*head
, *tail
, *next
;
2335 struct cleanup
*old_chain
;
2336 enum command_control_type ret
;
2337 enum misc_command_type val
;
2344 val
= read_next_line (&next
);
2346 /* Ignore blank lines or comments. */
2347 if (val
== nop_command
)
2350 if (val
== end_command
)
2352 ret
= simple_control
;
2356 if (val
!= ok_command
)
2358 ret
= invalid_control
;
2362 if (next
->control_type
== while_control
2363 || next
->control_type
== if_control
)
2366 ret
= recurse_read_control_structure (next
);
2369 if (ret
== invalid_control
)
2380 old_chain
= make_cleanup (free_command_lines
, &head
);
2389 if (ret
!= invalid_control
)
2391 discard_cleanups (old_chain
);
2395 do_cleanups (old_chain
);
2401 /* Free a chain of struct command_line's. */
2404 free_command_lines (lptr
)
2405 struct command_line
**lptr
;
2407 register struct command_line
*l
= *lptr
;
2408 register struct command_line
*next
;
2409 struct command_line
**blist
;
2414 if (l
->body_count
> 0)
2416 blist
= l
->body_list
;
2417 for (i
= 0; i
< l
->body_count
; i
++, blist
++)
2418 free_command_lines (blist
);
2427 /* Add an element to the list of info subcommands. */
2430 add_info (name
, fun
, doc
)
2432 void (*fun
) PARAMS ((char *, int));
2435 add_cmd (name
, no_class
, fun
, doc
, &infolist
);
2438 /* Add an alias to the list of info subcommands. */
2441 add_info_alias (name
, oldname
, abbrev_flag
)
2446 add_alias_cmd (name
, oldname
, 0, abbrev_flag
, &infolist
);
2449 /* The "info" command is defined as a prefix, with allow_unknown = 0.
2450 Therefore, its own definition is called only for "info" with no args. */
2454 info_command (arg
, from_tty
)
2458 printf_unfiltered ("\"info\" must be followed by the name of an info command.\n");
2459 help_list (infolist
, "info ", -1, gdb_stdout
);
2462 /* The "complete" command is used by Emacs to implement completion. */
2466 complete_command (arg
, from_tty
)
2478 argpoint
= strlen (arg
);
2480 for (completion
= line_completion_function (arg
, i
= 0, arg
, argpoint
);
2482 completion
= line_completion_function (arg
, ++i
, arg
, argpoint
))
2484 printf_unfiltered ("%s\n", completion
);
2489 /* The "show" command with no arguments shows all the settings. */
2493 show_command (arg
, from_tty
)
2497 cmd_show_list (showlist
, from_tty
, "");
2500 /* Add an element to the list of commands. */
2503 add_com (name
, class, fun
, doc
)
2505 enum command_class
class;
2506 void (*fun
) PARAMS ((char *, int));
2509 add_cmd (name
, class, fun
, doc
, &cmdlist
);
2512 /* Add an alias or abbreviation command to the list of commands. */
2515 add_com_alias (name
, oldname
, class, abbrev_flag
)
2518 enum command_class
class;
2521 add_alias_cmd (name
, oldname
, class, abbrev_flag
, &cmdlist
);
2528 error ("Argument required (%s).", why
);
2533 help_command (command
, from_tty
)
2535 int from_tty
; /* Ignored */
2537 help_cmd (command
, gdb_stdout
);
2541 validate_comname (comname
)
2547 error_no_arg ("name of command to define");
2552 if (!isalnum(*p
) && *p
!= '-' && *p
!= '_')
2553 error ("Junk in argument list: \"%s\"", p
);
2558 /* This is just a placeholder in the command data structures. */
2560 user_defined_command (ignore
, from_tty
)
2567 define_command (comname
, from_tty
)
2571 register struct command_line
*cmds
;
2572 register struct cmd_list_element
*c
, *newc
, *hookc
= 0;
2573 char *tem
= comname
;
2574 #define HOOK_STRING "hook-"
2577 validate_comname (comname
);
2579 /* Look it up, and verify that we got an exact match. */
2580 c
= lookup_cmd (&tem
, cmdlist
, "", -1, 1);
2581 if (c
&& !STREQ (comname
, c
->name
))
2586 if (c
->class == class_user
|| c
->class == class_alias
)
2587 tem
= "Redefine command \"%s\"? ";
2589 tem
= "Really redefine built-in command \"%s\"? ";
2590 if (!query (tem
, c
->name
))
2591 error ("Command \"%s\" not redefined.", c
->name
);
2594 /* If this new command is a hook, then mark the command which it
2595 is hooking. Note that we allow hooking `help' commands, so that
2596 we can hook the `stop' pseudo-command. */
2598 if (!strncmp (comname
, HOOK_STRING
, HOOK_LEN
))
2600 /* Look up cmd it hooks, and verify that we got an exact match. */
2601 tem
= comname
+HOOK_LEN
;
2602 hookc
= lookup_cmd (&tem
, cmdlist
, "", -1, 0);
2603 if (hookc
&& !STREQ (comname
+HOOK_LEN
, hookc
->name
))
2607 warning ("Your new `%s' command does not hook any existing command.",
2609 if (!query ("Proceed? "))
2610 error ("Not confirmed.");
2614 comname
= savestring (comname
, strlen (comname
));
2616 /* If the rest of the commands will be case insensitive, this one
2617 should behave in the same manner. */
2618 for (tem
= comname
; *tem
; tem
++)
2619 if (isupper(*tem
)) *tem
= tolower(*tem
);
2623 printf_unfiltered ("Type commands for definition of \"%s\".\n\
2624 End with a line saying just \"end\".\n", comname
);
2625 gdb_flush (gdb_stdout
);
2629 cmds
= read_command_lines ();
2631 if (c
&& c
->class == class_user
)
2632 free_command_lines (&c
->user_commands
);
2634 newc
= add_cmd (comname
, class_user
, user_defined_command
,
2635 (c
&& c
->class == class_user
)
2636 ? c
->doc
: savestring ("User-defined.", 13), &cmdlist
);
2637 newc
->user_commands
= cmds
;
2639 /* If this new command is a hook, then mark both commands as being
2643 hookc
->hook
= newc
; /* Target gets hooked. */
2644 newc
->hookee
= hookc
; /* We are marked as hooking target cmd. */
2649 document_command (comname
, from_tty
)
2653 struct command_line
*doclines
;
2654 register struct cmd_list_element
*c
;
2655 char *tem
= comname
;
2657 validate_comname (comname
);
2659 c
= lookup_cmd (&tem
, cmdlist
, "", 0, 1);
2661 if (c
->class != class_user
)
2662 error ("Command \"%s\" is built-in.", comname
);
2665 printf_unfiltered ("Type documentation for \"%s\".\n\
2666 End with a line saying just \"end\".\n", comname
);
2668 doclines
= read_command_lines ();
2670 if (c
->doc
) free (c
->doc
);
2673 register struct command_line
*cl1
;
2674 register int len
= 0;
2676 for (cl1
= doclines
; cl1
; cl1
= cl1
->next
)
2677 len
+= strlen (cl1
->line
) + 1;
2679 c
->doc
= (char *) xmalloc (len
+ 1);
2682 for (cl1
= doclines
; cl1
; cl1
= cl1
->next
)
2684 strcat (c
->doc
, cl1
->line
);
2686 strcat (c
->doc
, "\n");
2690 free_command_lines (&doclines
);
2694 print_gnu_advertisement ()
2696 printf_unfiltered ("\
2697 GDB is free software and you are welcome to distribute copies of it\n\
2698 under certain conditions; type \"show copying\" to see the conditions.\n\
2699 There is absolutely no warranty for GDB; type \"show warranty\" for details.\n\
2704 print_gdb_version (stream
)
2707 fprintf_filtered (stream
, "\
2708 GDB %s (%s", version
, host_name
);
2710 if (!STREQ (host_name
, target_name
))
2711 fprintf_filtered (stream
, " --target %s", target_name
);
2713 fprintf_filtered (stream
, "), ");
2715 fprintf_filtered (stream
, "Copyright 1996 Free Software Foundation, Inc.");
2720 show_version (args
, from_tty
)
2725 print_gnu_advertisement ();
2726 print_gdb_version (gdb_stdout
);
2727 printf_filtered ("\n");
2731 /* xgdb calls this to reprint the usual GDB prompt. Obsolete now that xgdb
2737 printf_unfiltered ("%s", prompt
);
2738 gdb_flush (gdb_stdout
);
2742 quit_command (args
, from_tty
)
2748 /* An optional expression may be used to cause gdb to terminate with the
2749 value of that expression. */
2752 value_ptr val
= parse_and_eval (args
);
2754 exit_code
= (int) value_as_long (val
);
2757 if (inferior_pid
!= 0 && target_has_execution
)
2761 if (query ("The program is running. Quit anyway (and detach it)? "))
2762 target_detach (args
, from_tty
);
2764 error ("Not confirmed.");
2768 if (query ("The program is running. Quit anyway (and kill it)? "))
2771 error ("Not confirmed.");
2774 /* UDI wants this, to kill the TIP. */
2777 /* Save the history information if it is appropriate to do so. */
2778 if (write_history_p
&& history_filename
)
2779 write_history (history_filename
);
2784 /* Returns whether GDB is running on a terminal and whether the user
2785 desires that questions be asked of them on that terminal. */
2788 input_from_terminal_p ()
2790 return gdb_has_a_terminal () && (instream
== stdin
) & caution
;
2795 pwd_command (args
, from_tty
)
2799 if (args
) error ("The \"pwd\" command does not take an argument: %s", args
);
2800 getcwd (gdb_dirbuf
, sizeof (gdb_dirbuf
));
2802 if (!STREQ (gdb_dirbuf
, current_directory
))
2803 printf_unfiltered ("Working directory %s\n (canonically %s).\n",
2804 current_directory
, gdb_dirbuf
);
2806 printf_unfiltered ("Working directory %s.\n", current_directory
);
2810 cd_command (dir
, from_tty
)
2815 /* Found something other than leading repetitions of "/..". */
2816 int found_real_path
;
2819 /* If the new directory is absolute, repeat is a no-op; if relative,
2820 repeat might be useful but is more likely to be a mistake. */
2824 error_no_arg ("new working directory");
2826 dir
= tilde_expand (dir
);
2827 make_cleanup (free
, dir
);
2829 if (chdir (dir
) < 0)
2830 perror_with_name (dir
);
2833 dir
= savestring (dir
, len
- (len
> 1 && SLASH_P(dir
[len
-1])));
2835 current_directory
= dir
;
2838 if (SLASH_P (current_directory
[0]) && current_directory
[1] == '\0')
2839 current_directory
= concat (current_directory
, dir
, NULL
);
2841 current_directory
= concat (current_directory
, SLASH_STRING
, dir
, NULL
);
2845 /* Now simplify any occurrences of `.' and `..' in the pathname. */
2847 found_real_path
= 0;
2848 for (p
= current_directory
; *p
;)
2850 if (SLASH_P (p
[0]) && p
[1] == '.' && (p
[2] == 0 || SLASH_P (p
[2])))
2852 else if (SLASH_P (p
[0]) && p
[1] == '.' && p
[2] == '.'
2853 && (p
[3] == 0 || SLASH_P (p
[3])))
2855 if (found_real_path
)
2857 /* Search backwards for the directory just before the "/.."
2858 and obliterate it and the "/..". */
2860 while (q
!= current_directory
&& ! SLASH_P (q
[-1]))
2863 if (q
== current_directory
)
2864 /* current_directory is
2865 a relative pathname ("can't happen"--leave it alone). */
2869 strcpy (q
- 1, p
+ 3);
2874 /* We are dealing with leading repetitions of "/..", for example
2875 "/../..", which is the Mach super-root. */
2880 found_real_path
= 1;
2885 forget_cached_source_info ();
2888 pwd_command ((char *) 0, 1);
2891 struct source_cleanup_lines_args
{
2894 char *old_pre_error
;
2895 char *old_error_pre_print
;
2899 source_cleanup_lines (args
)
2902 struct source_cleanup_lines_args
*p
=
2903 (struct source_cleanup_lines_args
*)args
;
2904 source_line_number
= p
->old_line
;
2905 source_file_name
= p
->old_file
;
2906 source_pre_error
= p
->old_pre_error
;
2907 error_pre_print
= p
->old_error_pre_print
;
2912 source_command (args
, from_tty
)
2917 struct cleanup
*old_cleanups
;
2919 struct source_cleanup_lines_args old_lines
;
2924 error ("source command requires pathname of file to source.");
2927 file
= tilde_expand (file
);
2928 old_cleanups
= make_cleanup (free
, file
);
2930 stream
= fopen (file
, FOPEN_RT
);
2932 perror_with_name (file
);
2934 make_cleanup (fclose
, stream
);
2936 old_lines
.old_line
= source_line_number
;
2937 old_lines
.old_file
= source_file_name
;
2938 old_lines
.old_pre_error
= source_pre_error
;
2939 old_lines
.old_error_pre_print
= error_pre_print
;
2940 make_cleanup (source_cleanup_lines
, &old_lines
);
2941 source_line_number
= 0;
2942 source_file_name
= file
;
2943 source_pre_error
= error_pre_print
== NULL
? "" : error_pre_print
;
2944 source_pre_error
= savestring (source_pre_error
, strlen (source_pre_error
));
2945 make_cleanup (free
, source_pre_error
);
2946 /* This will get set every time we read a line. So it won't stay "" for
2948 error_pre_print
= "";
2950 needed_length
= strlen (source_file_name
) + strlen (source_pre_error
) + 80;
2951 if (source_error_allocated
< needed_length
)
2953 source_error_allocated
*= 2;
2954 if (source_error_allocated
< needed_length
)
2955 source_error_allocated
= needed_length
;
2956 if (source_error
== NULL
)
2957 source_error
= xmalloc (source_error_allocated
);
2959 source_error
= xrealloc (source_error
, source_error_allocated
);
2962 read_command_file (stream
);
2964 do_cleanups (old_cleanups
);
2969 echo_command (text
, from_tty
)
2977 while ((c
= *p
++) != '\0')
2981 /* \ at end of argument is used after spaces
2982 so they won't be lost. */
2986 c
= parse_escape (&p
);
2988 printf_filtered ("%c", c
);
2991 printf_filtered ("%c", c
);
2994 /* Force this output to appear now. */
2996 gdb_flush (gdb_stdout
);
3001 dont_repeat_command (ignored
, from_tty
)
3005 *line
= 0; /* Can't call dont_repeat here because we're not
3006 necessarily reading from stdin. */
3009 #ifdef TARGET_BYTE_ORDER_SELECTABLE
3011 /* Functions to manipulate the endianness of the target. */
3013 #ifndef TARGET_BYTE_ORDER_DEFAULT
3014 #define TARGET_BYTE_ORDER_DEFAULT BIG_ENDIAN
3017 int target_byte_order
= TARGET_BYTE_ORDER_DEFAULT
;
3019 static int target_byte_order_auto
= 1;
3021 /* Called if the user enters ``set endian'' without an argument. */
3023 set_endian (args
, from_tty
)
3027 printf_unfiltered ("\"set endian\" must be followed by \"auto\", \"big\" or \"little\".\n");
3028 show_endian (args
, from_tty
);
3031 /* Called by ``set endian big''. */
3033 set_endian_big (args
, from_tty
)
3037 target_byte_order
= BIG_ENDIAN
;
3038 target_byte_order_auto
= 0;
3041 /* Called by ``set endian little''. */
3043 set_endian_little (args
, from_tty
)
3047 target_byte_order
= LITTLE_ENDIAN
;
3048 target_byte_order_auto
= 0;
3051 /* Called by ``set endian auto''. */
3053 set_endian_auto (args
, from_tty
)
3057 target_byte_order_auto
= 1;
3060 /* Called by ``show endian''. */
3062 show_endian (args
, from_tty
)
3067 (target_byte_order_auto
3068 ? "The target endianness is set automatically (currently %s endian)\n"
3069 : "The target is assumed to be %s endian\n");
3070 printf_unfiltered ((char *) msg
, TARGET_BYTE_ORDER
== BIG_ENDIAN
? "big" : "little");
3073 #endif /* defined (TARGET_BYTE_ORDER_SELECTABLE) */
3075 /* Set the endianness from a BFD. */
3077 set_endian_from_file (abfd
)
3080 #ifdef TARGET_BYTE_ORDER_SELECTABLE
3083 if (bfd_big_endian (abfd
))
3086 want
= LITTLE_ENDIAN
;
3087 if (target_byte_order_auto
)
3088 target_byte_order
= want
;
3089 else if (target_byte_order
!= want
)
3090 warning ("%s endian file does not match %s endian target.",
3091 want
== BIG_ENDIAN
? "big" : "little",
3092 TARGET_BYTE_ORDER
== BIG_ENDIAN
? "big" : "little");
3094 #else /* ! defined (TARGET_BYTE_ORDER_SELECTABLE) */
3096 if (bfd_big_endian (abfd
)
3097 ? TARGET_BYTE_ORDER
!= BIG_ENDIAN
3098 : TARGET_BYTE_ORDER
== BIG_ENDIAN
)
3099 warning ("%s endian file does not match %s endian target.",
3100 bfd_big_endian (abfd
) ? "big" : "little",
3101 TARGET_BYTE_ORDER
== BIG_ENDIAN
? "big" : "little");
3103 #endif /* ! defined (TARGET_BYTE_ORDER_SELECTABLE) */
3106 /* Functions to manipulate command line editing control variables. */
3108 /* Number of commands to print in each call to show_commands. */
3109 #define Hist_print 10
3111 show_commands (args
, from_tty
)
3115 /* Index for history commands. Relative to history_base. */
3118 /* Number of the history entry which we are planning to display next.
3119 Relative to history_base. */
3122 /* The first command in the history which doesn't exist (i.e. one more
3123 than the number of the last command). Relative to history_base. */
3126 extern HIST_ENTRY
*history_get
PARAMS ((int));
3128 /* Print out some of the commands from the command history. */
3129 /* First determine the length of the history list. */
3130 hist_len
= history_size
;
3131 for (offset
= 0; offset
< history_size
; offset
++)
3133 if (!history_get (history_base
+ offset
))
3142 if (args
[0] == '+' && args
[1] == '\0')
3143 /* "info editing +" should print from the stored position. */
3146 /* "info editing <exp>" should print around command number <exp>. */
3147 num
= (parse_and_eval_address (args
) - history_base
) - Hist_print
/ 2;
3149 /* "show commands" means print the last Hist_print commands. */
3152 num
= hist_len
- Hist_print
;
3158 /* If there are at least Hist_print commands, we want to display the last
3159 Hist_print rather than, say, the last 6. */
3160 if (hist_len
- num
< Hist_print
)
3162 num
= hist_len
- Hist_print
;
3167 for (offset
= num
; offset
< num
+ Hist_print
&& offset
< hist_len
; offset
++)
3169 printf_filtered ("%5d %s\n", history_base
+ offset
,
3170 (history_get (history_base
+ offset
))->line
);
3173 /* The next command we want to display is the next one that we haven't
3177 /* If the user repeats this command with return, it should do what
3178 "show commands +" does. This is unnecessary if arg is null,
3179 because "show commands +" is not useful after "show commands". */
3180 if (from_tty
&& args
)
3187 /* Called by do_setshow_command. */
3190 set_history_size_command (args
, from_tty
, c
)
3193 struct cmd_list_element
*c
;
3195 if (history_size
== INT_MAX
)
3196 unstifle_history ();
3197 else if (history_size
>= 0)
3198 stifle_history (history_size
);
3201 history_size
= INT_MAX
;
3202 error ("History size must be non-negative");
3208 set_history (args
, from_tty
)
3212 printf_unfiltered ("\"set history\" must be followed by the name of a history subcommand.\n");
3213 help_list (sethistlist
, "set history ", -1, gdb_stdout
);
3218 show_history (args
, from_tty
)
3222 cmd_show_list (showhistlist
, from_tty
, "");
3225 int info_verbose
= 0; /* Default verbose msgs off */
3227 /* Called by do_setshow_command. An elaborate joke. */
3230 set_verbose (args
, from_tty
, c
)
3233 struct cmd_list_element
*c
;
3235 char *cmdname
= "verbose";
3236 struct cmd_list_element
*showcmd
;
3238 showcmd
= lookup_cmd_1 (&cmdname
, showlist
, NULL
, 1);
3242 c
->doc
= "Set verbose printing of informational messages.";
3243 showcmd
->doc
= "Show verbose printing of informational messages.";
3247 c
->doc
= "Set verbosity.";
3248 showcmd
->doc
= "Show verbosity.";
3253 float_handler (signo
)
3256 /* This message is based on ANSI C, section 4.7. Note that integer
3257 divide by zero causes this, so "float" is a misnomer. */
3258 signal (SIGFPE
, float_handler
);
3259 error ("Erroneous arithmetic operation.");
3271 enablebreaklist
= NULL
;
3275 #ifdef TARGET_BYTE_ORDER_SELECTABLE
3279 showhistlist
= NULL
;
3280 unsethistlist
= NULL
;
3281 #if MAINTENANCE_CMDS
3282 maintenancelist
= NULL
;
3283 maintenanceinfolist
= NULL
;
3284 maintenanceprintlist
= NULL
;
3286 setprintlist
= NULL
;
3287 showprintlist
= NULL
;
3288 setchecklist
= NULL
;
3289 showchecklist
= NULL
;
3292 /* Init the history buffer. Note that we are called after the init file(s)
3293 * have been read so that the user can change the history file via his
3294 * .gdbinit file (for instance). The GDBHISTFILE environment variable
3295 * overrides all of this.
3303 tmpenv
= getenv ("HISTSIZE");
3305 history_size
= atoi (tmpenv
);
3306 else if (!history_size
)
3309 stifle_history (history_size
);
3311 tmpenv
= getenv ("GDBHISTFILE");
3313 history_filename
= savestring (tmpenv
, strlen(tmpenv
));
3314 else if (!history_filename
) {
3315 /* We include the current directory so that if the user changes
3316 directories the file written will be the same as the one
3318 history_filename
= concat (current_directory
, "/.gdb_history", NULL
);
3320 read_history (history_filename
);
3326 struct cmd_list_element
*c
;
3328 #ifdef TARGET_BYTE_ORDER_SELECTABLE
3330 add_prefix_cmd ("endian", class_support
, set_endian
,
3331 "Set endianness of target.",
3332 &endianlist
, "set endian ", 0, &setlist
);
3333 add_cmd ("big", class_support
, set_endian_big
,
3334 "Set target as being big endian.", &endianlist
);
3335 add_cmd ("little", class_support
, set_endian_little
,
3336 "Set target as being little endian.", &endianlist
);
3337 add_cmd ("auto", class_support
, set_endian_auto
,
3338 "Select target endianness automatically.", &endianlist
);
3339 add_cmd ("endian", class_support
, show_endian
,
3340 "Show endianness of target.", &showlist
);
3342 #endif /* defined (TARGET_BYTE_ORDER_SELECTABLE) */
3344 #ifdef DEFAULT_PROMPT
3345 prompt
= savestring (DEFAULT_PROMPT
, strlen(DEFAULT_PROMPT
));
3347 prompt
= savestring ("(gdb) ", 6);
3350 /* Set the important stuff up for command editing. */
3351 command_editing_p
= 1;
3352 history_expansion_p
= 0;
3353 write_history_p
= 0;
3355 /* Setup important stuff for command line editing. */
3356 rl_completion_entry_function
= (int (*)()) readline_line_completion_function
;
3357 rl_completer_word_break_characters
= gdb_completer_word_break_characters
;
3358 rl_completer_quote_characters
= gdb_completer_quote_characters
;
3359 rl_readline_name
= "gdb";
3361 /* Define the classes of commands.
3362 They will appear in the help list in the reverse of this order. */
3364 add_cmd ("internals", class_maintenance
, NO_FUNCTION
,
3365 "Maintenance commands.\n\
3366 Some gdb commands are provided just for use by gdb maintainers.\n\
3367 These commands are subject to frequent change, and may not be as\n\
3368 well documented as user commands.",
3370 add_cmd ("obscure", class_obscure
, NO_FUNCTION
, "Obscure features.", &cmdlist
);
3371 add_cmd ("aliases", class_alias
, NO_FUNCTION
, "Aliases of other commands.", &cmdlist
);
3372 add_cmd ("user-defined", class_user
, NO_FUNCTION
, "User-defined commands.\n\
3373 The commands in this class are those defined by the user.\n\
3374 Use the \"define\" command to define a command.", &cmdlist
);
3375 add_cmd ("support", class_support
, NO_FUNCTION
, "Support facilities.", &cmdlist
);
3376 add_cmd ("status", class_info
, NO_FUNCTION
, "Status inquiries.", &cmdlist
);
3377 add_cmd ("files", class_files
, NO_FUNCTION
, "Specifying and examining files.", &cmdlist
);
3378 add_cmd ("breakpoints", class_breakpoint
, NO_FUNCTION
, "Making program stop at certain points.", &cmdlist
);
3379 add_cmd ("data", class_vars
, NO_FUNCTION
, "Examining data.", &cmdlist
);
3380 add_cmd ("stack", class_stack
, NO_FUNCTION
, "Examining the stack.\n\
3381 The stack is made up of stack frames. Gdb assigns numbers to stack frames\n\
3382 counting from zero for the innermost (currently executing) frame.\n\n\
3383 At any time gdb identifies one frame as the \"selected\" frame.\n\
3384 Variable lookups are done with respect to the selected frame.\n\
3385 When the program being debugged stops, gdb selects the innermost frame.\n\
3386 The commands below can be used to select other frames by number or address.",
3388 add_cmd ("running", class_run
, NO_FUNCTION
, "Running the program.", &cmdlist
);
3390 add_com ("pwd", class_files
, pwd_command
,
3391 "Print working directory. This is used for your program as well.");
3392 c
= add_cmd ("cd", class_files
, cd_command
,
3393 "Set working directory to DIR for debugger and program being debugged.\n\
3394 The change does not take effect for the program being debugged\n\
3395 until the next time it is started.", &cmdlist
);
3396 c
->completer
= filename_completer
;
3399 (add_set_cmd ("prompt", class_support
, var_string
, (char *)&prompt
,
3404 add_com ("echo", class_support
, echo_command
,
3405 "Print a constant string. Give string as argument.\n\
3406 C escape sequences may be used in the argument.\n\
3407 No newline is added at the end of the argument;\n\
3408 use \"\\n\" if you want a newline to be printed.\n\
3409 Since leading and trailing whitespace are ignored in command arguments,\n\
3410 if you want to print some you must use \"\\\" before leading whitespace\n\
3411 to be printed or after trailing whitespace.");
3412 add_com ("document", class_support
, document_command
,
3413 "Document a user-defined command.\n\
3414 Give command name as argument. Give documentation on following lines.\n\
3415 End with a line of just \"end\".");
3416 add_com ("define", class_support
, define_command
,
3417 "Define a new command name. Command name is argument.\n\
3418 Definition appears on following lines, one command per line.\n\
3419 End with a line of just \"end\".\n\
3420 Use the \"document\" command to give documentation for the new command.\n\
3421 Commands defined in this way may have up to ten arguments.");
3424 c
= add_cmd ("source", class_support
, source_command
,
3425 "Read commands from a file named FILE.\n\
3426 Note that the file \"" GDBINIT_FILENAME
"\" is read automatically in this way\n\
3427 when gdb is started.", &cmdlist
);
3429 /* Punt file name, we can't help it easily. */
3430 c
= add_cmd ("source", class_support
, source_command
,
3431 "Read commands from a file named FILE.\n\
3432 Note that the file \".gdbinit\" is read automatically in this way\n\
3433 when gdb is started.", &cmdlist
);
3435 c
->completer
= filename_completer
;
3437 add_com ("quit", class_support
, quit_command
, "Exit gdb.");
3438 add_com ("help", class_support
, help_command
, "Print list of commands.");
3439 add_com_alias ("q", "quit", class_support
, 1);
3440 add_com_alias ("h", "help", class_support
, 1);
3442 add_com ("dont-repeat", class_support
, dont_repeat_command
, "Don't repeat this command.\n\
3443 Primarily used inside of user-defined commands that should not be repeated when\n\
3446 c
= add_set_cmd ("verbose", class_support
, var_boolean
, (char *)&info_verbose
,
3449 add_show_from_set (c
, &showlist
);
3450 c
->function
.sfunc
= set_verbose
;
3451 set_verbose (NULL
, 0, c
);
3454 (add_set_cmd ("editing", class_support
, var_boolean
, (char *)&command_editing_p
,
3455 "Set editing of command lines as they are typed.\n\
3456 Use \"on\" to enable to enable the editing, and \"off\" to disable it.\n\
3457 Without an argument, command line editing is enabled. To edit, use\n\
3458 EMACS-like or VI-like commands like control-P or ESC.", &setlist
),
3461 add_prefix_cmd ("history", class_support
, set_history
,
3462 "Generic command for setting command history parameters.",
3463 &sethistlist
, "set history ", 0, &setlist
);
3464 add_prefix_cmd ("history", class_support
, show_history
,
3465 "Generic command for showing command history parameters.",
3466 &showhistlist
, "show history ", 0, &showlist
);
3469 (add_set_cmd ("expansion", no_class
, var_boolean
, (char *)&history_expansion_p
,
3470 "Set history expansion on command input.\n\
3471 Without an argument, history expansion is enabled.", &sethistlist
),
3475 (add_set_cmd ("save", no_class
, var_boolean
, (char *)&write_history_p
,
3476 "Set saving of the history record on exit.\n\
3477 Use \"on\" to enable to enable the saving, and \"off\" to disable it.\n\
3478 Without an argument, saving is enabled.", &sethistlist
),
3481 c
= add_set_cmd ("size", no_class
, var_integer
, (char *)&history_size
,
3482 "Set the size of the command history, \n\
3483 ie. the number of previous commands to keep a record of.", &sethistlist
);
3484 add_show_from_set (c
, &showhistlist
);
3485 c
->function
.sfunc
= set_history_size_command
;
3488 (add_set_cmd ("filename", no_class
, var_filename
, (char *)&history_filename
,
3489 "Set the filename in which to record the command history\n\
3490 (the list of previous commands of which a record is kept).", &sethistlist
),
3494 (add_set_cmd ("confirm", class_support
, var_boolean
,
3496 "Set whether to confirm potentially dangerous operations.",
3500 add_prefix_cmd ("info", class_info
, info_command
,
3501 "Generic command for showing things about the program being debugged.",
3502 &infolist
, "info ", 0, &cmdlist
);
3503 add_com_alias ("i", "info", class_info
, 1);
3505 add_com ("complete", class_obscure
, complete_command
,
3506 "List the completions for the rest of the line as a command.");
3508 add_prefix_cmd ("show", class_info
, show_command
,
3509 "Generic command for showing things about the debugger.",
3510 &showlist
, "show ", 0, &cmdlist
);
3511 /* Another way to get at the same thing. */
3512 add_info ("set", show_command
, "Show all GDB settings.");
3514 add_cmd ("commands", no_class
, show_commands
,
3515 "Show the history of commands you typed.\n\
3516 You can supply a command number to start with, or a `+' to start after\n\
3517 the previous command number shown.",
3520 add_cmd ("version", no_class
, show_version
,
3521 "Show what version of GDB this is.", &showlist
);
3523 add_com ("while", class_support
, while_command
,
3524 "Execute nested commands WHILE the conditional expression is non zero.\n\
3525 The conditional expression must follow the word `while' and must in turn be\n\
3526 followed by a new line. The nested commands must be entered one per line,\n\
3527 and should be terminated by the word `end'.");
3529 add_com ("if", class_support
, if_command
,
3530 "Execute nested commands once IF the conditional expression is non zero.\n\
3531 The conditional expression must follow the word `if' and must in turn be\n\
3532 followed by a new line. The nested commands must be entered one per line,\n\
3533 and should be terminated by the word 'else' or `end'. If an else clause\n\
3534 is used, the same rules apply to its nested commands as to the first ones.");
3536 /* If target is open when baud changes, it doesn't take effect until the
3537 next open (I think, not sure). */
3538 add_show_from_set (add_set_cmd ("remotebaud", no_class
,
3539 var_zinteger
, (char *)&baud_rate
,
3540 "Set baud rate for remote serial I/O.\n\
3541 This value is used to set the speed of the serial port when debugging\n\
3542 using remote targets.", &setlist
),
3546 add_set_cmd ("remotedebug", no_class
, var_zinteger
, (char *)&remote_debug
,
3547 "Set debugging of remote protocol.\n\
3548 When enabled, each packet sent or received with the remote target\n\
3549 is displayed.", &setlist
),