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 extern void initialize_utils
PARAMS ((void));
56 /* Prototypes for local functions */
58 static void dont_repeat_command
PARAMS ((char *, int));
60 static void source_cleanup_lines
PARAMS ((PTR
));
62 static void user_defined_command
PARAMS ((char *, int));
64 static void init_signals
PARAMS ((void));
67 static void stop_sig
PARAMS ((int));
70 static void disconnect
PARAMS ((int));
72 static char * line_completion_function
PARAMS ((char *, int, char *, int));
74 static char * readline_line_completion_function
PARAMS ((char *, int));
76 static void command_loop_marker
PARAMS ((int));
78 static void while_command
PARAMS ((char *, int));
80 static void if_command
PARAMS ((char *, int));
82 static struct command_line
*
83 build_command_line
PARAMS ((enum command_control_type
, char *));
85 static struct command_line
*
86 get_command_line
PARAMS ((enum command_control_type
, char *));
88 static void realloc_body_list
PARAMS ((struct command_line
*, int));
90 static enum misc_command_type read_next_line
PARAMS ((struct command_line
**));
92 static enum command_control_type
93 recurse_read_control_structure
PARAMS ((struct command_line
*));
95 static struct cleanup
* setup_user_args
PARAMS ((char *));
97 static char * locate_arg
PARAMS ((char *));
99 static char * insert_args
PARAMS ((char *));
101 static void arg_cleanup
PARAMS ((void));
103 static void init_main
PARAMS ((void));
105 static void init_cmd_lists
PARAMS ((void));
107 static void float_handler
PARAMS ((int));
109 static void init_signals
PARAMS ((void));
111 static void set_verbose
PARAMS ((char *, int, struct cmd_list_element
*));
113 #ifdef TARGET_BYTE_ORDER_SELECTABLE
115 static void set_endian
PARAMS ((char *, int));
117 static void set_endian_big
PARAMS ((char *, int));
119 static void set_endian_little
PARAMS ((char *, int));
121 static void set_endian_auto
PARAMS ((char *, int));
123 static void show_endian
PARAMS ((char *, int));
127 static void show_history
PARAMS ((char *, int));
129 static void set_history
PARAMS ((char *, int));
131 static void set_history_size_command
PARAMS ((char *, int,
132 struct cmd_list_element
*));
134 static void show_commands
PARAMS ((char *, int));
136 static void echo_command
PARAMS ((char *, int));
138 static void pwd_command
PARAMS ((char *, int));
140 static void show_version
PARAMS ((char *, int));
142 static void document_command
PARAMS ((char *, int));
144 static void define_command
PARAMS ((char *, int));
146 static void validate_comname
PARAMS ((char *));
148 static void help_command
PARAMS ((char *, int));
150 static void show_command
PARAMS ((char *, int));
152 static void info_command
PARAMS ((char *, int));
154 static void complete_command
PARAMS ((char *, int));
156 static void do_nothing
PARAMS ((int));
158 static int quit_cover
PARAMS ((char *));
160 static void disconnect
PARAMS ((int));
162 static void source_cleanup
PARAMS ((FILE *));
164 /* If this definition isn't overridden by the header files, assume
165 that isatty and fileno exist on this system. */
167 #define ISATTY(FP) (isatty (fileno (FP)))
170 /* Initialization file name for gdb. This is overridden in some configs. */
172 #ifndef GDBINIT_FILENAME
173 #define GDBINIT_FILENAME ".gdbinit"
175 char gdbinit
[] = GDBINIT_FILENAME
;
177 int inhibit_gdbinit
= 0;
179 /* If nonzero, and GDB has been configured to be able to use windows,
180 attempt to open them upon startup. */
184 /* Version number of GDB, as a string. */
186 extern char *version
;
188 /* Canonical host name as a string. */
190 extern char *host_name
;
192 /* Canonical target name as a string. */
194 extern char *target_name
;
196 extern char lang_frame_mismatch_warn
[]; /* language.c */
198 /* Flag for whether we want all the "from_tty" gubbish printed. */
200 int caution
= 1; /* Default is yes, sigh. */
202 /* Define all cmd_list_elements. */
204 /* Chain containing all defined commands. */
206 struct cmd_list_element
*cmdlist
;
208 /* Chain containing all defined info subcommands. */
210 struct cmd_list_element
*infolist
;
212 /* Chain containing all defined enable subcommands. */
214 struct cmd_list_element
*enablelist
;
216 /* Chain containing all defined disable subcommands. */
218 struct cmd_list_element
*disablelist
;
220 /* Chain containing all defined delete subcommands. */
222 struct cmd_list_element
*deletelist
;
224 /* Chain containing all defined "enable breakpoint" subcommands. */
226 struct cmd_list_element
*enablebreaklist
;
228 /* Chain containing all defined set subcommands */
230 struct cmd_list_element
*setlist
;
232 /* Chain containing all defined unset subcommands */
234 struct cmd_list_element
*unsetlist
;
236 /* Chain containing all defined show subcommands. */
238 struct cmd_list_element
*showlist
;
240 #ifdef TARGET_BYTE_ORDER_SELECTABLE
241 /* Chain containing the \"set endian\" commands. */
243 struct cmd_list_element
*endianlist
;
246 /* Chain containing all defined \"set history\". */
248 struct cmd_list_element
*sethistlist
;
250 /* Chain containing all defined \"show history\". */
252 struct cmd_list_element
*showhistlist
;
254 /* Chain containing all defined \"unset history\". */
256 struct cmd_list_element
*unsethistlist
;
258 /* Chain containing all defined maintenance subcommands. */
261 struct cmd_list_element
*maintenancelist
;
264 /* Chain containing all defined "maintenance info" subcommands. */
267 struct cmd_list_element
*maintenanceinfolist
;
270 /* Chain containing all defined "maintenance print" subcommands. */
273 struct cmd_list_element
*maintenanceprintlist
;
276 struct cmd_list_element
*setprintlist
;
278 struct cmd_list_element
*showprintlist
;
280 struct cmd_list_element
*setchecklist
;
282 struct cmd_list_element
*showchecklist
;
284 /* stdio stream that command input is being read from. Set to stdin normally.
285 Set by source_command to the file we are sourcing. Set to NULL if we are
286 executing a user-defined command or interacting via a GUI. */
290 /* Current working directory. */
292 char *current_directory
;
294 /* The directory name is actually stored here (usually). */
295 char gdb_dirbuf
[1024];
297 /* Function to call before reading a command, if nonzero.
298 The function receives two args: an input stream,
299 and a prompt string. */
301 void (*window_hook
) PARAMS ((FILE *, char *));
306 /* gdb prints this when reading a command interactively */
309 /* Buffer used for reading command lines, and the size
310 allocated for it so far. */
315 /* Nonzero if the current command is modified by "server ". This
316 affects things like recording into the command history, comamnds
317 repeating on RETURN, etc. This is so a user interface (emacs, GUI,
318 whatever) can issue its own commands and also send along commands
319 from the user, and have the user not notice that the user interface
320 is issuing commands too. */
323 /* Baud rate specified for talking to serial target systems. Default
324 is left as -1, so targets can choose their own defaults. */
325 /* FIXME: This means that "show remotebaud" and gr_files_info can print -1
326 or (unsigned int)-1. This is a Bad User Interface. */
330 /* Timeout limit for response from target. */
332 int remote_timeout
= 20; /* Set default to 20 */
334 /* Non-zero tells remote* modules to output debugging info. */
336 int remote_debug
= 0;
338 /* Level of control structure. */
339 static int control_level
;
341 /* Structure for arguments to user defined functions. */
342 #define MAXUSERARGS 10
345 struct user_args
*next
;
354 /* Signal to catch ^Z typed while reading a command: SIGTSTP or SIGCONT. */
358 #define STOP_SIGNAL SIGTSTP
359 static void stop_sig
PARAMS ((int));
363 /* Some System V have job control but not sigsetmask(). */
364 #if !defined (HAVE_SIGSETMASK)
366 #define HAVE_SIGSETMASK 1
368 #define HAVE_SIGSETMASK 0
372 #if 0 == (HAVE_SIGSETMASK)
373 #define sigsetmask(n)
376 /* Hooks for alternate command interfaces. */
378 /* Called after most modules have been initialized, but before taking users
381 void (*init_ui_hook
) PARAMS ((void));
383 /* Called instead of command_loop at top level. Can be invoked via
384 return_to_top_level. */
386 void (*command_loop_hook
) PARAMS ((void));
389 /* Called instead of fputs for all output. */
391 void (*fputs_unfiltered_hook
) PARAMS ((const char *linebuffer
, FILE *stream
));
393 /* Called when the target says something to the host, which may
394 want to appear in a different window. */
396 void (*target_output_hook
) PARAMS ((char *));
398 /* Called from print_frame_info to list the line we stopped in. */
400 void (*print_frame_info_listing_hook
) PARAMS ((struct symtab
*s
, int line
,
401 int stopline
, int noerror
));
402 /* Replaces most of query. */
404 int (*query_hook
) PARAMS ((const char *, va_list));
406 /* Called from gdb_flush to flush output. */
408 void (*flush_hook
) PARAMS ((FILE *stream
));
410 /* These three functions support getting lines of text from the user. They
411 are used in sequence. First readline_begin_hook is called with a text
412 string that might be (for example) a message for the user to type in a
413 sequence of commands to be executed at a breakpoint. If this function
414 calls back to a GUI, it might take this opportunity to pop up a text
415 interaction window with this message. Next, readline_hook is called
416 with a prompt that is emitted prior to collecting the user input.
417 It can be called multiple times. Finally, readline_end_hook is called
418 to notify the GUI that we are done with the interaction window and it
421 void (*readline_begin_hook
) PARAMS ((char *, ...));
422 char * (*readline_hook
) PARAMS ((char *));
423 void (*readline_end_hook
) PARAMS ((void));
425 /* Called as appropriate to notify the interface of the specified breakpoint
428 void (*create_breakpoint_hook
) PARAMS ((struct breakpoint
*bpt
));
429 void (*delete_breakpoint_hook
) PARAMS ((struct breakpoint
*bpt
));
430 void (*modify_breakpoint_hook
) PARAMS ((struct breakpoint
*bpt
));
432 /* Called during long calculations to allow GUI to repair window damage, and to
433 check for stop buttons, etc... */
435 void (*interactive_hook
) PARAMS ((void));
437 /* Called when the registers have changed, as a hint to a GUI
438 to minimize window update. */
440 void (*registers_changed_hook
) PARAMS ((void));
442 /* Called when going to wait for the target. Usually allows the GUI to run
443 while waiting for target events. */
445 int (*target_wait_hook
) PARAMS ((int pid
, struct target_waitstatus
*status
));
447 /* Used by UI as a wrapper around command execution. May do various things
448 like enabling/disabling buttons, etc... */
450 void (*call_command_hook
) PARAMS ((struct cmd_list_element
*c
, char *cmd
,
454 /* Takes control from error (). Typically used to prevent longjmps out of the
455 middle of the GUI. Usually used in conjunction with a catch routine. */
457 NORETURN
void (*error_hook
) PARAMS ((void)) ATTR_NORETURN
;
460 /* Where to go for return_to_top_level (RETURN_ERROR). */
461 jmp_buf error_return
;
462 /* Where to go for return_to_top_level (RETURN_QUIT). */
465 /* Return for reason REASON. This generally gets back to the command
466 loop, but can be caught via catch_errors. */
469 return_to_top_level (reason
)
470 enum return_reason reason
;
475 /* Perhaps it would be cleaner to do this via the cleanup chain (not sure
476 I can think of a reason why that is vital, though). */
477 bpstat_clear_actions(stop_bpstat
); /* Clear queued breakpoint commands */
479 disable_current_display ();
480 do_cleanups (ALL_CLEANUPS
);
482 if (annotation_level
> 1)
493 (NORETURN
void) longjmp
494 (reason
== RETURN_ERROR
? error_return
: quit_return
, 1);
497 /* Call FUNC with arg ARGS, catching any errors. If there is no
498 error, return the value returned by FUNC. If there is an error,
499 print ERRSTRING, print the specific error message, then return
502 Must not be called with immediate_quit in effect (bad things might
503 happen, say we got a signal in the middle of a memcpy to quit_return).
504 This is an OK restriction; with very few exceptions immediate_quit can
505 be replaced by judicious use of QUIT.
507 MASK specifies what to catch; it is normally set to
508 RETURN_MASK_ALL, if for no other reason than that the code which
509 calls catch_errors might not be set up to deal with a quit which
510 isn't caught. But if the code can deal with it, it generally
511 should be RETURN_MASK_ERROR, unless for some reason it is more
512 useful to abort only the portion of the operation inside the
513 catch_errors. Note that quit should return to the command line
514 fairly quickly, even if some further processing is being done. */
517 catch_errors (func
, args
, errstring
, mask
)
518 int (*func
) PARAMS ((char *));
527 struct cleanup
*saved_cleanup_chain
;
528 char *saved_error_pre_print
;
529 char *saved_quit_pre_print
;
531 saved_cleanup_chain
= save_cleanups ();
532 saved_error_pre_print
= error_pre_print
;
533 saved_quit_pre_print
= quit_pre_print
;
535 if (mask
& RETURN_MASK_ERROR
)
537 memcpy ((char *)saved_error
, (char *)error_return
, sizeof (jmp_buf));
538 error_pre_print
= errstring
;
540 if (mask
& RETURN_MASK_QUIT
)
542 memcpy (saved_quit
, quit_return
, sizeof (jmp_buf));
543 quit_pre_print
= errstring
;
546 if (setjmp (tmp_jmp
) == 0)
548 if (mask
& RETURN_MASK_ERROR
)
549 memcpy (error_return
, tmp_jmp
, sizeof (jmp_buf));
550 if (mask
& RETURN_MASK_QUIT
)
551 memcpy (quit_return
, tmp_jmp
, sizeof (jmp_buf));
552 val
= (*func
) (args
);
557 restore_cleanups (saved_cleanup_chain
);
559 if (mask
& RETURN_MASK_ERROR
)
561 memcpy (error_return
, saved_error
, sizeof (jmp_buf));
562 error_pre_print
= saved_error_pre_print
;
564 if (mask
& RETURN_MASK_QUIT
)
566 memcpy (quit_return
, saved_quit
, sizeof (jmp_buf));
567 quit_pre_print
= saved_quit_pre_print
;
572 /* Handler for SIGHUP. */
579 catch_errors (quit_cover
, NULL
,
580 "Could not kill the program being debugged", RETURN_MASK_ALL
);
581 signal (SIGHUP
, SIG_DFL
);
582 kill (getpid (), SIGHUP
);
586 /* Just a little helper function for disconnect(). */
592 caution
= 0; /* Throw caution to the wind -- we're exiting.
593 This prevents asking the user dumb questions. */
594 quit_command((char *)0, 0);
598 /* Line number we are currently in in a file which is being sourced. */
599 static int source_line_number
;
601 /* Name of the file we are sourcing. */
602 static char *source_file_name
;
604 /* Buffer containing the error_pre_print used by the source stuff.
606 static char *source_error
;
607 static int source_error_allocated
;
609 /* Something to glom on to the start of error_pre_print if source_file_name
611 static char *source_pre_error
;
613 /* Clean up on error during a "source" command (or execution of a
614 user-defined command). */
617 source_cleanup (stream
)
620 /* Restore the previous input stream. */
624 /* Read commands from STREAM. */
626 read_command_file (stream
)
629 struct cleanup
*cleanups
;
631 cleanups
= make_cleanup (source_cleanup
, instream
);
634 do_cleanups (cleanups
);
637 extern void init_proc
PARAMS ((void));
639 void (*pre_init_ui_hook
) PARAMS ((void));
644 if (pre_init_ui_hook
)
647 /* Run the init function of each source file */
649 getcwd (gdb_dirbuf
, sizeof (gdb_dirbuf
));
650 current_directory
= gdb_dirbuf
;
652 init_cmd_lists (); /* This needs to be done first */
653 initialize_targets (); /* Setup target_terminal macros for utils.c */
654 initialize_utils (); /* Make errors and warnings possible */
655 initialize_all_files ();
656 init_main (); /* But that omits this file! Do it now */
661 /* We need a default language for parsing expressions, so simple things like
662 "set width 0" won't fail if no language is explicitly set in a config file
663 or implicitly set by reading an executable during startup. */
664 set_language (language_c
);
665 expected_language
= current_language
; /* don't warn about the change. */
671 /* Allocate, initialize a new command line structure for one of the
672 control commands (if/while). */
674 static struct command_line
*
675 build_command_line (type
, args
)
676 enum command_control_type type
;
679 struct command_line
*cmd
;
682 error ("if/while commands require arguments.\n");
684 cmd
= (struct command_line
*)xmalloc (sizeof (struct command_line
));
686 cmd
->control_type
= type
;
690 = (struct command_line
**)xmalloc (sizeof (struct command_line
*)
692 memset (cmd
->body_list
, 0, sizeof (struct command_line
*) * cmd
->body_count
);
693 cmd
->line
= savestring (args
, strlen (args
));
697 /* Build and return a new command structure for the control commands
698 such as "if" and "while". */
700 static struct command_line
*
701 get_command_line (type
, arg
)
702 enum command_control_type type
;
705 struct command_line
*cmd
;
706 struct cleanup
*old_chain
= NULL
;
708 /* Allocate and build a new command line structure. */
709 cmd
= build_command_line (type
, arg
);
711 old_chain
= make_cleanup (free_command_lines
, &cmd
);
713 /* Read in the body of this command. */
714 if (recurse_read_control_structure (cmd
) == invalid_control
)
716 warning ("error reading in control structure\n");
717 do_cleanups (old_chain
);
721 discard_cleanups (old_chain
);
725 /* Recursively print a command (including full control structures). */
727 print_command_line (cmd
, depth
)
728 struct command_line
*cmd
;
735 for (i
= 0; i
< depth
; i
++)
736 fputs_filtered (" ", gdb_stdout
);
739 /* A simple command, print it and return. */
740 if (cmd
->control_type
== simple_control
)
742 fputs_filtered (cmd
->line
, gdb_stdout
);
743 fputs_filtered ("\n", gdb_stdout
);
747 /* loop_continue to jump to the start of a while loop, print it
749 if (cmd
->control_type
== continue_control
)
751 fputs_filtered ("loop_continue\n", gdb_stdout
);
755 /* loop_break to break out of a while loop, print it and return. */
756 if (cmd
->control_type
== break_control
)
758 fputs_filtered ("loop_break\n", gdb_stdout
);
762 /* A while command. Recursively print its subcommands before returning. */
763 if (cmd
->control_type
== while_control
)
765 struct command_line
*list
;
766 fputs_filtered ("while ", gdb_stdout
);
767 fputs_filtered (cmd
->line
, gdb_stdout
);
768 fputs_filtered ("\n", gdb_stdout
);
769 list
= *cmd
->body_list
;
772 print_command_line (list
, depth
+ 1);
777 /* An if command. Recursively print both arms before returning. */
778 if (cmd
->control_type
== if_control
)
780 fputs_filtered ("if ", gdb_stdout
);
781 fputs_filtered (cmd
->line
, gdb_stdout
);
782 fputs_filtered ("\n", gdb_stdout
);
784 print_command_line (cmd
->body_list
[0], depth
+ 1);
786 /* Show the false arm if it exists. */
787 if (cmd
->body_count
== 2)
791 for (i
= 0; i
< depth
; i
++)
792 fputs_filtered (" ", gdb_stdout
);
794 fputs_filtered ("else\n", gdb_stdout
);
795 print_command_line (cmd
->body_list
[1], depth
+ 1);
799 for (i
= 0; i
< depth
; i
++)
800 fputs_filtered (" ", gdb_stdout
);
802 fputs_filtered ("end\n", gdb_stdout
);
806 /* Execute the command in CMD. */
808 enum command_control_type
809 execute_control_command (cmd
)
810 struct command_line
*cmd
;
812 struct expression
*expr
;
813 struct command_line
*current
;
814 struct cleanup
*old_chain
= 0;
818 enum command_control_type ret
;
821 switch (cmd
->control_type
)
824 /* A simple command, execute it and return. */
825 new_line
= insert_args (cmd
->line
);
827 return invalid_control
;
828 old_chain
= make_cleanup (free_current_contents
, &new_line
);
829 execute_command (new_line
, 0);
830 ret
= cmd
->control_type
;
833 case continue_control
:
835 /* Return for "continue", and "break" so we can either
836 continue the loop at the top, or break out. */
837 ret
= cmd
->control_type
;
842 /* Parse the loop control expression for the while statement. */
843 new_line
= insert_args (cmd
->line
);
845 return invalid_control
;
846 old_chain
= make_cleanup (free_current_contents
, &new_line
);
847 expr
= parse_expression (new_line
);
848 make_cleanup (free_current_contents
, &expr
);
850 ret
= simple_control
;
853 /* Keep iterating so long as the expression is true. */
860 /* Evaluate the expression. */
861 val_mark
= value_mark ();
862 val
= evaluate_expression (expr
);
863 cond_result
= value_true (val
);
864 value_free_to_mark (val_mark
);
866 /* If the value is false, then break out of the loop. */
870 /* Execute the body of the while statement. */
871 current
= *cmd
->body_list
;
874 ret
= execute_control_command (current
);
876 /* If we got an error, or a "break" command, then stop
878 if (ret
== invalid_control
|| ret
== break_control
)
884 /* If we got a "continue" command, then restart the loop
886 if (ret
== continue_control
)
889 /* Get the next statement. */
890 current
= current
->next
;
894 /* Reset RET so that we don't recurse the break all the way down. */
895 if (ret
== break_control
)
896 ret
= simple_control
;
903 new_line
= insert_args (cmd
->line
);
905 return invalid_control
;
906 old_chain
= make_cleanup (free_current_contents
, &new_line
);
907 /* Parse the conditional for the if statement. */
908 expr
= parse_expression (new_line
);
909 make_cleanup (free_current_contents
, &expr
);
912 ret
= simple_control
;
914 /* Evaluate the conditional. */
915 val_mark
= value_mark ();
916 val
= evaluate_expression (expr
);
918 /* Choose which arm to take commands from based on the value of the
919 conditional expression. */
920 if (value_true (val
))
921 current
= *cmd
->body_list
;
922 else if (cmd
->body_count
== 2)
923 current
= *(cmd
->body_list
+ 1);
924 value_free_to_mark (val_mark
);
926 /* Execute commands in the given arm. */
929 ret
= execute_control_command (current
);
931 /* If we got an error, get out. */
932 if (ret
!= simple_control
)
935 /* Get the next statement in the body. */
936 current
= current
->next
;
943 warning ("Invalid control type in command structure.");
944 return invalid_control
;
948 do_cleanups (old_chain
);
953 /* "while" command support. Executes a body of statements while the
954 loop condition is nonzero. */
957 while_command (arg
, from_tty
)
961 struct command_line
*command
= NULL
;
964 command
= get_command_line (while_control
, arg
);
969 execute_control_command (command
);
970 free_command_lines (&command
);
973 /* "if" command support. Execute either the true or false arm depending
974 on the value of the if conditional. */
977 if_command (arg
, from_tty
)
981 struct command_line
*command
= NULL
;
984 command
= get_command_line (if_control
, arg
);
989 execute_control_command (command
);
990 free_command_lines (&command
);
997 struct user_args
*oargs
= user_args
;
999 fatal ("Internal error, arg_cleanup called with no user args.\n");
1001 user_args
= user_args
->next
;
1005 /* Bind the incomming arguments for a user defined command to
1006 $arg0, $arg1 ... $argMAXUSERARGS. */
1008 static struct cleanup
*
1012 struct user_args
*args
;
1013 struct cleanup
*old_chain
;
1014 unsigned int arg_count
= 0;
1016 args
= (struct user_args
*)xmalloc (sizeof (struct user_args
));
1017 memset (args
, 0, sizeof (struct user_args
));
1019 args
->next
= user_args
;
1022 old_chain
= make_cleanup (arg_cleanup
, 0);
1031 if (arg_count
>= MAXUSERARGS
)
1033 error ("user defined function may only have %d arguments.\n",
1038 /* Strip whitespace. */
1039 while (*p
== ' ' || *p
== '\t')
1042 /* P now points to an argument. */
1044 user_args
->a
[arg_count
].arg
= p
;
1046 /* Get to the end of this argument. */
1047 while (*p
&& *p
!= ' ' && *p
!= '\t')
1050 user_args
->a
[arg_count
].len
= p
- start_arg
;
1057 /* Given character string P, return a point to the first argument ($arg),
1058 or NULL if P contains no arguments. */
1064 while ((p
= strchr (p
, '$')))
1066 if (strncmp (p
, "$arg", 4) == 0 && isdigit (p
[4]))
1073 /* Insert the user defined arguments stored in user_arg into the $arg
1074 arguments found in line, with the updated copy being placed into nline. */
1080 char *p
, *save_line
, *new_line
;
1083 /* First we need to know how much memory to allocate for the new line. */
1086 while ((p
= locate_arg (line
)))
1091 if (i
>= user_args
->count
)
1093 error ("Missing argument %d in user function.\n", i
);
1096 len
+= user_args
->a
[i
].len
;
1100 /* Don't forget the tail. */
1101 len
+= strlen (line
);
1103 /* Allocate space for the new line and fill it in. */
1104 new_line
= (char *)xmalloc (len
+ 1);
1105 if (new_line
== NULL
)
1108 /* Restore pointer to beginning of old line. */
1111 /* Save pointer to beginning of new line. */
1112 save_line
= new_line
;
1114 while ((p
= locate_arg (line
)))
1118 memcpy (new_line
, line
, p
- line
);
1119 new_line
+= p
- line
;
1122 len
= user_args
->a
[i
].len
;
1125 memcpy (new_line
, user_args
->a
[i
].arg
, len
);
1130 /* Don't forget the tail. */
1131 strcpy (new_line
, line
);
1133 /* Return a pointer to the beginning of the new line. */
1138 execute_user_command (c
, args
)
1139 struct cmd_list_element
*c
;
1142 register struct command_line
*cmdlines
;
1143 struct cleanup
*old_chain
;
1144 enum command_control_type ret
;
1146 old_chain
= setup_user_args (args
);
1148 cmdlines
= c
->user_commands
;
1153 /* Set the instream to 0, indicating execution of a
1154 user-defined function. */
1155 old_chain
= make_cleanup (source_cleanup
, instream
);
1156 instream
= (FILE *) 0;
1159 ret
= execute_control_command (cmdlines
);
1160 if (ret
!= simple_control
&& ret
!= break_control
)
1162 warning ("Error in control structure.\n");
1165 cmdlines
= cmdlines
->next
;
1167 do_cleanups (old_chain
);
1170 /* Execute the line P as a command.
1171 Pass FROM_TTY as second argument to the defining function. */
1174 execute_command (p
, from_tty
)
1178 register struct cmd_list_element
*c
;
1179 register enum language flang
;
1180 static int warned
= 0;
1181 /* FIXME: These should really be in an appropriate header file */
1182 extern void serial_log_command
PARAMS ((const char *));
1186 /* This can happen when command_line_input hits end of file. */
1190 serial_log_command (p
);
1192 while (*p
== ' ' || *p
== '\t') p
++;
1197 c
= lookup_cmd (&p
, cmdlist
, "", 0, 1);
1198 /* Pass null arg rather than an empty one. */
1201 /* Clear off trailing whitespace, except for set and complete command. */
1202 if (arg
&& c
->type
!= set_cmd
&& c
->function
.cfunc
!= complete_command
)
1204 p
= arg
+ strlen (arg
) - 1;
1205 while (p
>= arg
&& (*p
== ' ' || *p
== '\t'))
1210 /* If this command has been hooked, run the hook first. */
1212 execute_user_command (c
->hook
, (char *)0);
1214 if (c
->class == class_user
)
1215 execute_user_command (c
, arg
);
1216 else if (c
->type
== set_cmd
|| c
->type
== show_cmd
)
1217 do_setshow_command (arg
, from_tty
& caution
, c
);
1218 else if (c
->function
.cfunc
== NO_FUNCTION
)
1219 error ("That is not a command, just a help topic.");
1220 else if (call_command_hook
)
1221 call_command_hook (c
, arg
, from_tty
& caution
);
1223 (*c
->function
.cfunc
) (arg
, from_tty
& caution
);
1226 /* Tell the user if the language has changed (except first time). */
1227 if (current_language
!= expected_language
)
1229 if (language_mode
== language_mode_auto
) {
1230 language_info (1); /* Print what changed. */
1235 /* Warn the user if the working language does not match the
1236 language of the current frame. Only warn the user if we are
1237 actually running the program, i.e. there is a stack. */
1238 /* FIXME: This should be cacheing the frame and only running when
1239 the frame changes. */
1241 if (target_has_stack
)
1243 flang
= get_frame_language ();
1245 && flang
!= language_unknown
1246 && flang
!= current_language
->la_language
)
1248 printf_filtered ("%s\n", lang_frame_mismatch_warn
);
1256 command_loop_marker (foo
)
1261 /* Read commands from `instream' and execute them
1262 until end of file or error reading instream. */
1267 struct cleanup
*old_chain
;
1269 int stdin_is_tty
= ISATTY (stdin
);
1270 long time_at_cmd_start
;
1272 long space_at_cmd_start
;
1274 extern int display_time
;
1275 extern int display_space
;
1277 while (instream
&& !feof (instream
))
1279 if (window_hook
&& instream
== stdin
)
1280 (*window_hook
) (instream
, prompt
);
1283 if (instream
== stdin
&& stdin_is_tty
)
1284 reinitialize_more_filter ();
1285 old_chain
= make_cleanup (command_loop_marker
, 0);
1286 command
= command_line_input (instream
== stdin
? prompt
: (char *) NULL
,
1287 instream
== stdin
, "prompt");
1291 time_at_cmd_start
= get_run_time ();
1296 extern char **environ
;
1297 char *lim
= (char *) sbrk (0);
1299 space_at_cmd_start
= (long) (lim
- (char *) &environ
);
1303 execute_command (command
, instream
== stdin
);
1304 /* Do any commands attached to breakpoint we stopped at. */
1305 bpstat_do_actions (&stop_bpstat
);
1306 do_cleanups (old_chain
);
1310 long cmd_time
= get_run_time () - time_at_cmd_start
;
1312 printf_unfiltered ("Command execution time: %ld.%06ld\n",
1313 cmd_time
/ 1000000, cmd_time
% 1000000);
1319 extern char **environ
;
1320 char *lim
= (char *) sbrk (0);
1321 long space_now
= lim
- (char *) &environ
;
1322 long space_diff
= space_now
- space_at_cmd_start
;
1324 printf_unfiltered ("Space used: %ld (%c%ld for this command)\n",
1326 (space_diff
>= 0 ? '+' : '-'),
1333 /* Commands call this if they do not want to be repeated by null lines. */
1341 /* If we aren't reading from standard input, we are saving the last
1342 thing read from stdin in line and don't want to delete it. Null lines
1343 won't repeat here in any case. */
1344 if (instream
== stdin
)
1348 /* Read a line from the stream "instream" without command line editing.
1350 It prints PRROMPT once at the start.
1351 Action is compatible with "readline", e.g. space for the result is
1352 malloc'd and should be freed by the caller.
1354 A NULL return means end of file. */
1356 gdb_readline (prrompt
)
1361 int input_index
= 0;
1362 int result_size
= 80;
1366 /* Don't use a _filtered function here. It causes the assumed
1367 character position to be off, since the newline we read from
1368 the user is not accounted for. */
1369 fputs_unfiltered (prrompt
, gdb_stdout
);
1371 /* Move to a new line so the entered line doesn't have a prompt
1372 on the front of it. */
1373 fputs_unfiltered ("\n", gdb_stdout
);
1375 gdb_flush (gdb_stdout
);
1378 result
= (char *) xmalloc (result_size
);
1382 /* Read from stdin if we are executing a user defined command.
1383 This is the right thing for prompt_for_continue, at least. */
1384 c
= fgetc (instream
? instream
: stdin
);
1388 if (input_index
> 0)
1389 /* The last line does not end with a newline. Return it, and
1390 if we are called again fgetc will still return EOF and
1391 we'll return NULL then. */
1400 result
[input_index
++] = c
;
1401 while (input_index
>= result_size
)
1404 result
= (char *) xrealloc (result
, result_size
);
1408 result
[input_index
++] = '\0';
1412 /* Variables which control command line editing and history
1413 substitution. These variables are given default values at the end
1415 static int command_editing_p
;
1416 static int history_expansion_p
;
1417 static int write_history_p
;
1418 static int history_size
;
1419 static char *history_filename
;
1421 /* readline uses the word breaks for two things:
1422 (1) In figuring out where to point the TEXT parameter to the
1423 rl_completion_entry_function. Since we don't use TEXT for much,
1424 it doesn't matter a lot what the word breaks are for this purpose, but
1425 it does affect how much stuff M-? lists.
1426 (2) If one of the matches contains a word break character, readline
1427 will quote it. That's why we switch between
1428 gdb_completer_word_break_characters and
1429 gdb_completer_command_word_break_characters. I'm not sure when
1430 we need this behavior (perhaps for funky characters in C++ symbols?). */
1432 /* Variables which are necessary for fancy command line editing. */
1433 char *gdb_completer_word_break_characters
=
1434 " \t\n!@#$%^&*()+=|~`}{[]\"';:?/>.<,-";
1436 /* When completing on command names, we remove '-' from the list of
1437 word break characters, since we use it in command names. If the
1438 readline library sees one in any of the current completion strings,
1439 it thinks that the string needs to be quoted and automatically supplies
1441 char *gdb_completer_command_word_break_characters
=
1442 " \t\n!@#$%^&*()+=|~`}{[]\"';:?/>.<,";
1444 /* Characters that can be used to quote completion strings. Note that we
1445 can't include '"' because the gdb C parser treats such quoted sequences
1447 char *gdb_completer_quote_characters
=
1450 /* Functions that are used as part of the fancy command line editing. */
1452 /* This can be used for functions which don't want to complete on symbols
1453 but don't want to complete on anything else either. */
1456 noop_completer (text
, prefix
)
1463 /* Complete on filenames. */
1465 filename_completer (text
, word
)
1469 /* From readline. */
1470 extern char *filename_completion_function
PARAMS ((char *, int));
1471 int subsequent_name
;
1473 int return_val_used
;
1474 int return_val_alloced
;
1476 return_val_used
= 0;
1477 /* Small for testing. */
1478 return_val_alloced
= 1;
1479 return_val
= (char **) xmalloc (return_val_alloced
* sizeof (char *));
1481 subsequent_name
= 0;
1485 p
= filename_completion_function (text
, subsequent_name
);
1486 if (return_val_used
>= return_val_alloced
)
1488 return_val_alloced
*= 2;
1490 (char **) xrealloc (return_val
,
1491 return_val_alloced
* sizeof (char *));
1495 return_val
[return_val_used
++] = p
;
1498 /* Like emacs, don't complete on old versions. Especially useful
1499 in the "source" command. */
1500 if (p
[strlen (p
) - 1] == '~')
1506 /* Return exactly p. */
1507 return_val
[return_val_used
++] = p
;
1508 else if (word
> text
)
1510 /* Return some portion of p. */
1511 q
= xmalloc (strlen (p
) + 5);
1512 strcpy (q
, p
+ (word
- text
));
1513 return_val
[return_val_used
++] = q
;
1518 /* Return some of TEXT plus p. */
1519 q
= xmalloc (strlen (p
) + (text
- word
) + 5);
1520 strncpy (q
, word
, text
- word
);
1521 q
[text
- word
] = '\0';
1523 return_val
[return_val_used
++] = q
;
1527 subsequent_name
= 1;
1530 /* There is no way to do this just long enough to affect quote inserting
1531 without also affecting the next completion. This should be fixed in
1533 /* Insure that readline does the right thing
1534 with respect to inserting quotes. */
1535 rl_completer_word_break_characters
= "";
1540 /* Here are some useful test cases for completion. FIXME: These should
1541 be put in the test suite. They should be tested with both M-? and TAB.
1543 "show output-" "radix"
1544 "show output" "-radix"
1545 "p" ambiguous (commands starting with p--path, print, printf, etc.)
1546 "p " ambiguous (all symbols)
1547 "info t foo" no completions
1548 "info t " no completions
1549 "info t" ambiguous ("info target", "info terminal", etc.)
1550 "info ajksdlfk" no completions
1551 "info ajksdlfk " no completions
1553 "info " ambiguous (all info commands)
1554 "p \"a" no completions (string constant)
1555 "p 'a" ambiguous (all symbols starting with a)
1556 "p b-a" ambiguous (all symbols starting with a)
1557 "p b-" ambiguous (all symbols)
1558 "file Make" "file" (word break hard to screw up here)
1559 "file ../gdb.stabs/we" "ird" (needs to not break word at slash)
1562 /* Generate completions one by one for the completer. Each time we are
1563 called return another potential completion to the caller.
1564 line_completion just completes on commands or passes the buck to the
1565 command's completer function, the stuff specific to symbol completion
1566 is in make_symbol_completion_list.
1568 TEXT is the caller's idea of the "word" we are looking at.
1570 MATCHES is the number of matches that have currently been collected from
1571 calling this completion function. When zero, then we need to initialize,
1572 otherwise the initialization has already taken place and we can just
1573 return the next potential completion string.
1575 LINE_BUFFER is available to be looked at; it contains the entire text
1576 of the line. POINT is the offset in that line of the cursor. You
1577 should pretend that the line ends at POINT.
1579 Returns NULL if there are no more completions, else a pointer to a string
1580 which is a possible completion, it is the caller's responsibility to
1584 line_completion_function (text
, matches
, line_buffer
, point
)
1590 static char **list
= (char **)NULL
; /* Cache of completions */
1591 static int index
; /* Next cached completion */
1592 char *output
= NULL
;
1593 char *tmp_command
, *p
;
1594 /* Pointer within tmp_command which corresponds to text. */
1596 struct cmd_list_element
*c
, *result_list
;
1600 /* The caller is beginning to accumulate a new set of completions, so
1601 we need to find all of them now, and cache them for returning one at
1602 a time on future calls. */
1606 /* Free the storage used by LIST, but not by the strings inside.
1607 This is because rl_complete_internal () frees the strings. */
1613 /* Choose the default set of word break characters to break completions.
1614 If we later find out that we are doing completions on command strings
1615 (as opposed to strings supplied by the individual command completer
1616 functions, which can be any string) then we will switch to the
1617 special word break set for command strings, which leaves out the
1618 '-' character used in some commands. */
1620 rl_completer_word_break_characters
=
1621 gdb_completer_word_break_characters
;
1623 /* Decide whether to complete on a list of gdb commands or on symbols. */
1624 tmp_command
= (char *) alloca (point
+ 1);
1627 strncpy (tmp_command
, line_buffer
, point
);
1628 tmp_command
[point
] = '\0';
1629 /* Since text always contains some number of characters leading up
1630 to point, we can find the equivalent position in tmp_command
1631 by subtracting that many characters from the end of tmp_command. */
1632 word
= tmp_command
+ point
- strlen (text
);
1636 /* An empty line we want to consider ambiguous; that is, it
1637 could be any command. */
1638 c
= (struct cmd_list_element
*) -1;
1643 c
= lookup_cmd_1 (&p
, cmdlist
, &result_list
, 1);
1646 /* Move p up to the next interesting thing. */
1647 while (*p
== ' ' || *p
== '\t')
1654 /* It is an unrecognized command. So there are no
1655 possible completions. */
1658 else if (c
== (struct cmd_list_element
*) -1)
1662 /* lookup_cmd_1 advances p up to the first ambiguous thing, but
1663 doesn't advance over that thing itself. Do so now. */
1665 while (*q
&& (isalnum (*q
) || *q
== '-' || *q
== '_'))
1667 if (q
!= tmp_command
+ point
)
1669 /* There is something beyond the ambiguous
1670 command, so there are no possible completions. For
1671 example, "info t " or "info t foo" does not complete
1672 to anything, because "info t" can be "info target" or
1678 /* We're trying to complete on the command which was ambiguous.
1679 This we can deal with. */
1682 list
= complete_on_cmdlist (*result_list
->prefixlist
, p
,
1687 list
= complete_on_cmdlist (cmdlist
, p
, word
);
1689 /* Insure that readline does the right thing with respect to
1690 inserting quotes. */
1691 rl_completer_word_break_characters
=
1692 gdb_completer_command_word_break_characters
;
1697 /* We've recognized a full command. */
1699 if (p
== tmp_command
+ point
)
1701 /* There is no non-whitespace in the line beyond the command. */
1703 if (p
[-1] == ' ' || p
[-1] == '\t')
1705 /* The command is followed by whitespace; we need to complete
1706 on whatever comes after command. */
1709 /* It is a prefix command; what comes after it is
1710 a subcommand (e.g. "info "). */
1711 list
= complete_on_cmdlist (*c
->prefixlist
, p
, word
);
1713 /* Insure that readline does the right thing
1714 with respect to inserting quotes. */
1715 rl_completer_word_break_characters
=
1716 gdb_completer_command_word_break_characters
;
1720 list
= complete_on_enum (c
->enums
, p
, word
);
1721 rl_completer_word_break_characters
=
1722 gdb_completer_command_word_break_characters
;
1726 /* It is a normal command; what comes after it is
1727 completed by the command's completer function. */
1728 list
= (*c
->completer
) (p
, word
);
1733 /* The command is not followed by whitespace; we need to
1734 complete on the command itself. e.g. "p" which is a
1735 command itself but also can complete to "print", "ptype"
1739 /* Find the command we are completing on. */
1741 while (q
> tmp_command
)
1743 if (isalnum (q
[-1]) || q
[-1] == '-' || q
[-1] == '_')
1749 list
= complete_on_cmdlist (result_list
, q
, word
);
1751 /* Insure that readline does the right thing
1752 with respect to inserting quotes. */
1753 rl_completer_word_break_characters
=
1754 gdb_completer_command_word_break_characters
;
1759 /* There is non-whitespace beyond the command. */
1761 if (c
->prefixlist
&& !c
->allow_unknown
)
1763 /* It is an unrecognized subcommand of a prefix command,
1764 e.g. "info adsfkdj". */
1769 list
= complete_on_enum (c
->enums
, p
, word
);
1773 /* It is a normal command. */
1774 list
= (*c
->completer
) (p
, word
);
1780 /* If we found a list of potential completions during initialization then
1781 dole them out one at a time. The vector of completions is NULL
1782 terminated, so after returning the last one, return NULL (and continue
1783 to do so) each time we are called after that, until a new list is
1788 output
= list
[index
];
1796 /* Can't do this because readline hasn't yet checked the word breaks
1797 for figuring out whether to insert a quote. */
1799 /* Make sure the word break characters are set back to normal for the
1800 next time that readline tries to complete something. */
1801 rl_completer_word_break_characters
=
1802 gdb_completer_word_break_characters
;
1808 /* Line completion interface function for readline. */
1811 readline_line_completion_function (text
, matches
)
1815 return line_completion_function (text
, matches
, rl_line_buffer
, rl_point
);
1818 /* Skip over a possibly quoted word (as defined by the quote characters
1819 and word break characters the completer uses). Returns pointer to the
1820 location after the "word". */
1826 char quote_char
= '\0';
1829 for (scan
= str
; *scan
!= '\0'; scan
++)
1831 if (quote_char
!= '\0')
1833 /* Ignore everything until the matching close quote char */
1834 if (*scan
== quote_char
)
1836 /* Found matching close quote. */
1841 else if (strchr (gdb_completer_quote_characters
, *scan
))
1843 /* Found start of a quoted string. */
1846 else if (strchr (gdb_completer_word_break_characters
, *scan
))
1860 #if STOP_SIGNAL == SIGTSTP
1861 signal (SIGTSTP
, SIG_DFL
);
1863 kill (getpid (), SIGTSTP
);
1864 signal (SIGTSTP
, stop_sig
);
1866 signal (STOP_SIGNAL
, stop_sig
);
1868 printf_unfiltered ("%s", prompt
);
1869 gdb_flush (gdb_stdout
);
1871 /* Forget about any previous command -- null line now will do nothing. */
1874 #endif /* STOP_SIGNAL */
1876 /* Initialize signal handlers. */
1886 signal (SIGINT
, request_quit
);
1888 /* If SIGTRAP was set to SIG_IGN, then the SIG_IGN will get passed
1889 to the inferior and breakpoints will be ignored. */
1891 signal (SIGTRAP
, SIG_DFL
);
1894 /* If we initialize SIGQUIT to SIG_IGN, then the SIG_IGN will get
1895 passed to the inferior, which we don't want. It would be
1896 possible to do a "signal (SIGQUIT, SIG_DFL)" after we fork, but
1897 on BSD4.3 systems using vfork, that can affect the
1898 GDB process as well as the inferior (the signal handling tables
1899 might be in memory, shared between the two). Since we establish
1900 a handler for SIGQUIT, when we call exec it will set the signal
1901 to SIG_DFL for us. */
1903 signal (SIGQUIT
, do_nothing
);
1904 if (signal (SIGHUP
, do_nothing
) != SIG_IGN
)
1905 signal (SIGHUP
, disconnect
);
1907 signal (SIGFPE
, float_handler
);
1909 #if defined(SIGWINCH) && defined(SIGWINCH_HANDLER)
1910 signal (SIGWINCH
, SIGWINCH_HANDLER
);
1914 /* Read one line from the command input stream `instream'
1915 into the local static buffer `linebuffer' (whose current length
1917 The buffer is made bigger as necessary.
1918 Returns the address of the start of the line.
1920 NULL is returned for end of file.
1922 *If* the instream == stdin & stdin is a terminal, the line read
1923 is copied into the file line saver (global var char *line,
1924 length linesize) so that it can be duplicated.
1926 This routine either uses fancy command line editing or
1927 simple input as the user has requested. */
1930 command_line_input (prrompt
, repeat
, annotation_suffix
)
1933 char *annotation_suffix
;
1935 static char *linebuffer
= 0;
1936 static unsigned linelength
= 0;
1940 char *local_prompt
= prrompt
;
1944 /* The annotation suffix must be non-NULL. */
1945 if (annotation_suffix
== NULL
)
1946 annotation_suffix
= "";
1948 if (annotation_level
> 1 && instream
== stdin
)
1950 local_prompt
= alloca ((prrompt
== NULL
? 0 : strlen (prrompt
))
1951 + strlen (annotation_suffix
) + 40);
1952 if (prrompt
== NULL
)
1953 local_prompt
[0] = '\0';
1955 strcpy (local_prompt
, prrompt
);
1956 strcat (local_prompt
, "\n\032\032");
1957 strcat (local_prompt
, annotation_suffix
);
1958 strcat (local_prompt
, "\n");
1961 if (linebuffer
== 0)
1964 linebuffer
= (char *) xmalloc (linelength
);
1969 /* Control-C quits instantly if typed while in this loop
1970 since it should not wait until the user types a newline. */
1974 signal (STOP_SIGNAL
, stop_sig
);
1979 /* Make sure that all output has been output. Some machines may let
1980 you get away with leaving out some of the gdb_flush, but not all. */
1982 gdb_flush (gdb_stdout
);
1983 gdb_flush (gdb_stderr
);
1985 if (source_file_name
!= NULL
)
1987 ++source_line_number
;
1988 sprintf (source_error
,
1989 "%s%s:%d: Error in sourced command file:\n",
1992 source_line_number
);
1993 error_pre_print
= source_error
;
1996 if (annotation_level
> 1 && instream
== stdin
)
1998 printf_unfiltered ("\n\032\032pre-");
1999 printf_unfiltered (annotation_suffix
);
2000 printf_unfiltered ("\n");
2003 /* Don't use fancy stuff if not talking to stdin. */
2004 if (readline_hook
&& instream
== NULL
)
2006 rl
= (*readline_hook
) (local_prompt
);
2008 else if (command_editing_p
&& instream
== stdin
&& ISATTY (instream
))
2010 rl
= readline (local_prompt
);
2014 rl
= gdb_readline (local_prompt
);
2017 if (annotation_level
> 1 && instream
== stdin
)
2019 printf_unfiltered ("\n\032\032post-");
2020 printf_unfiltered (annotation_suffix
);
2021 printf_unfiltered ("\n");
2024 if (!rl
|| rl
== (char *) EOF
)
2029 if (strlen(rl
) + 1 + (p
- linebuffer
) > linelength
)
2031 linelength
= strlen(rl
) + 1 + (p
- linebuffer
);
2032 nline
= (char *) xrealloc (linebuffer
, linelength
);
2033 p
+= nline
- linebuffer
;
2037 /* Copy line. Don't copy null at end. (Leaves line alone
2038 if this was just a newline) */
2042 free (rl
); /* Allocated in readline. */
2044 if (p
== linebuffer
|| *(p
- 1) != '\\')
2047 p
--; /* Put on top of '\'. */
2048 local_prompt
= (char *) 0;
2053 signal (STOP_SIGNAL
, SIG_DFL
);
2060 #define SERVER_COMMAND_LENGTH 7
2062 (p
- linebuffer
> SERVER_COMMAND_LENGTH
)
2063 && STREQN (linebuffer
, "server ", SERVER_COMMAND_LENGTH
);
2066 /* Note that we don't set `line'. Between this and the check in
2067 dont_repeat, this insures that repeating will still do the
2070 return linebuffer
+ SERVER_COMMAND_LENGTH
;
2073 /* Do history expansion if that is wished. */
2074 if (history_expansion_p
&& instream
== stdin
2075 && ISATTY (instream
))
2077 char *history_value
;
2080 *p
= '\0'; /* Insert null now. */
2081 expanded
= history_expand (linebuffer
, &history_value
);
2084 /* Print the changes. */
2085 printf_unfiltered ("%s\n", history_value
);
2087 /* If there was an error, call this function again. */
2090 free (history_value
);
2091 return command_line_input (prrompt
, repeat
, annotation_suffix
);
2093 if (strlen (history_value
) > linelength
)
2095 linelength
= strlen (history_value
) + 1;
2096 linebuffer
= (char *) xrealloc (linebuffer
, linelength
);
2098 strcpy (linebuffer
, history_value
);
2099 p
= linebuffer
+ strlen(linebuffer
);
2100 free (history_value
);
2104 /* If we just got an empty line, and that is supposed
2105 to repeat the previous command, return the value in the
2107 if (repeat
&& p
== linebuffer
)
2109 for (p1
= linebuffer
; *p1
== ' ' || *p1
== '\t'; p1
++) ;
2115 /* Add line to history if appropriate. */
2116 if (instream
== stdin
2117 && ISATTY (stdin
) && *linebuffer
)
2118 add_history (linebuffer
);
2120 /* Note: lines consisting solely of comments are added to the command
2121 history. This is useful when you type a command, and then
2122 realize you don't want to execute it quite yet. You can comment
2123 out the command and then later fetch it from the value history
2124 and remove the '#'. The kill ring is probably better, but some
2125 people are in the habit of commenting things out. */
2127 *p1
= '\0'; /* Found a comment. */
2129 /* Save into global buffer if appropriate. */
2132 if (linelength
> linesize
)
2134 line
= xrealloc (line
, linelength
);
2135 linesize
= linelength
;
2137 strcpy (line
, linebuffer
);
2145 /* Expand the body_list of COMMAND so that it can hold NEW_LENGTH
2146 code bodies. This is typically used when we encounter an "else"
2147 clause for an "if" command. */
2150 realloc_body_list (command
, new_length
)
2151 struct command_line
*command
;
2155 struct command_line
**body_list
;
2157 n
= command
->body_count
;
2159 /* Nothing to do? */
2160 if (new_length
<= n
)
2163 body_list
= (struct command_line
**)
2164 xmalloc (sizeof (struct command_line
*) * new_length
);
2166 memcpy (body_list
, command
->body_list
, sizeof (struct command_line
*) * n
);
2168 free (command
->body_list
);
2169 command
->body_list
= body_list
;
2170 command
->body_count
= new_length
;
2173 /* Read one line from the input stream. If the command is an "else" or
2174 "end", return such an indication to the caller. */
2176 static enum misc_command_type
2177 read_next_line (command
)
2178 struct command_line
**command
;
2180 char *p
, *p1
, *prompt_ptr
, control_prompt
[256];
2183 if (control_level
>= 254)
2184 error ("Control nesting too deep!\n");
2186 /* Set a prompt based on the nesting of the control commands. */
2187 if (instream
== stdin
|| (instream
== 0 && readline_hook
!= NULL
))
2189 for (i
= 0; i
< control_level
; i
++)
2190 control_prompt
[i
] = ' ';
2191 control_prompt
[i
] = '>';
2192 control_prompt
[i
+1] = '\0';
2193 prompt_ptr
= (char *)&control_prompt
[0];
2198 p
= command_line_input (prompt_ptr
, instream
== stdin
, "commands");
2200 /* Not sure what to do here. */
2204 /* Strip leading and trailing whitespace. */
2205 while (*p
== ' ' || *p
== '\t')
2208 p1
= p
+ strlen (p
);
2209 while (p1
!= p
&& (p1
[-1] == ' ' || p1
[-1] == '\t'))
2212 /* Blanks and comments don't really do anything, but we need to
2213 distinguish them from else, end and other commands which can be
2215 if (p1
== p
|| p
[0] == '#')
2218 /* Is this the end of a simple, while, or if control structure? */
2219 if (p1
- p
== 3 && !strncmp (p
, "end", 3))
2222 /* Is the else clause of an if control structure? */
2223 if (p1
- p
== 4 && !strncmp (p
, "else", 4))
2224 return else_command
;
2226 /* Check for while, if, break, continue, etc and build a new command
2227 line structure for them. */
2228 if (p1
- p
> 5 && !strncmp (p
, "while", 5))
2229 *command
= build_command_line (while_control
, p
+ 6);
2230 else if (p1
- p
> 2 && !strncmp (p
, "if", 2))
2231 *command
= build_command_line (if_control
, p
+ 3);
2232 else if (p1
- p
== 10 && !strncmp (p
, "loop_break", 10))
2234 *command
= (struct command_line
*)
2235 xmalloc (sizeof (struct command_line
));
2236 (*command
)->next
= NULL
;
2237 (*command
)->line
= NULL
;
2238 (*command
)->control_type
= break_control
;
2239 (*command
)->body_count
= 0;
2240 (*command
)->body_list
= NULL
;
2242 else if (p1
- p
== 13 && !strncmp (p
, "loop_continue", 13))
2244 *command
= (struct command_line
*)
2245 xmalloc (sizeof (struct command_line
));
2246 (*command
)->next
= NULL
;
2247 (*command
)->line
= NULL
;
2248 (*command
)->control_type
= continue_control
;
2249 (*command
)->body_count
= 0;
2250 (*command
)->body_list
= NULL
;
2254 /* A normal command. */
2255 *command
= (struct command_line
*)
2256 xmalloc (sizeof (struct command_line
));
2257 (*command
)->next
= NULL
;
2258 (*command
)->line
= savestring (p
, p1
- p
);
2259 (*command
)->control_type
= simple_control
;
2260 (*command
)->body_count
= 0;
2261 (*command
)->body_list
= NULL
;
2264 /* Nothing special. */
2268 /* Recursively read in the control structures and create a command_line
2269 structure from them.
2271 The parent_control parameter is the control structure in which the
2272 following commands are nested. */
2274 static enum command_control_type
2275 recurse_read_control_structure (current_cmd
)
2276 struct command_line
*current_cmd
;
2278 int current_body
, i
;
2279 enum misc_command_type val
;
2280 enum command_control_type ret
;
2281 struct command_line
**body_ptr
, *child_tail
, *next
;
2286 /* Sanity checks. */
2287 if (current_cmd
->control_type
== simple_control
)
2289 error ("Recursed on a simple control type\n");
2290 return invalid_control
;
2293 if (current_body
> current_cmd
->body_count
)
2295 error ("Allocated body is smaller than this command type needs\n");
2296 return invalid_control
;
2299 /* Read lines from the input stream and build control structures. */
2305 val
= read_next_line (&next
);
2307 /* Just skip blanks and comments. */
2308 if (val
== nop_command
)
2311 if (val
== end_command
)
2313 if (current_cmd
->control_type
== while_control
2314 || current_cmd
->control_type
== if_control
)
2316 /* Success reading an entire control structure. */
2317 ret
= simple_control
;
2322 ret
= invalid_control
;
2327 /* Not the end of a control structure. */
2328 if (val
== else_command
)
2330 if (current_cmd
->control_type
== if_control
2331 && current_body
== 1)
2333 realloc_body_list (current_cmd
, 2);
2340 ret
= invalid_control
;
2347 child_tail
->next
= next
;
2351 body_ptr
= current_cmd
->body_list
;
2352 for (i
= 1; i
< current_body
; i
++)
2361 /* If the latest line is another control structure, then recurse
2363 if (next
->control_type
== while_control
2364 || next
->control_type
== if_control
)
2367 ret
= recurse_read_control_structure (next
);
2370 if (ret
!= simple_control
)
2380 /* Read lines from the input stream and accumulate them in a chain of
2381 struct command_line's, which is then returned. For input from a
2382 terminal, the special command "end" is used to mark the end of the
2383 input, and is not included in the returned chain of commands. */
2385 #define END_MESSAGE "End with a line saying just \"end\"."
2387 struct command_line
*
2388 read_command_lines (prompt
, from_tty
)
2392 struct command_line
*head
, *tail
, *next
;
2393 struct cleanup
*old_chain
;
2394 enum command_control_type ret
;
2395 enum misc_command_type val
;
2397 if (readline_begin_hook
)
2399 /* Note - intentional to merge messages with no newline */
2400 (*readline_begin_hook
) ("%s %s\n", prompt
, END_MESSAGE
);
2402 else if (from_tty
&& input_from_terminal_p ())
2404 printf_unfiltered ("%s\n%s\n", prompt
, END_MESSAGE
);
2405 gdb_flush (gdb_stdout
);
2413 val
= read_next_line (&next
);
2415 /* Ignore blank lines or comments. */
2416 if (val
== nop_command
)
2419 if (val
== end_command
)
2421 ret
= simple_control
;
2425 if (val
!= ok_command
)
2427 ret
= invalid_control
;
2431 if (next
->control_type
== while_control
2432 || next
->control_type
== if_control
)
2435 ret
= recurse_read_control_structure (next
);
2438 if (ret
== invalid_control
)
2449 old_chain
= make_cleanup (free_command_lines
, &head
);
2458 if (ret
!= invalid_control
)
2460 discard_cleanups (old_chain
);
2463 do_cleanups (old_chain
);
2466 if (readline_end_hook
)
2468 (*readline_end_hook
) ();
2473 /* Free a chain of struct command_line's. */
2476 free_command_lines (lptr
)
2477 struct command_line
**lptr
;
2479 register struct command_line
*l
= *lptr
;
2480 register struct command_line
*next
;
2481 struct command_line
**blist
;
2486 if (l
->body_count
> 0)
2488 blist
= l
->body_list
;
2489 for (i
= 0; i
< l
->body_count
; i
++, blist
++)
2490 free_command_lines (blist
);
2499 /* Add an element to the list of info subcommands. */
2502 add_info (name
, fun
, doc
)
2504 void (*fun
) PARAMS ((char *, int));
2507 add_cmd (name
, no_class
, fun
, doc
, &infolist
);
2510 /* Add an alias to the list of info subcommands. */
2513 add_info_alias (name
, oldname
, abbrev_flag
)
2518 add_alias_cmd (name
, oldname
, 0, abbrev_flag
, &infolist
);
2521 /* The "info" command is defined as a prefix, with allow_unknown = 0.
2522 Therefore, its own definition is called only for "info" with no args. */
2526 info_command (arg
, from_tty
)
2530 printf_unfiltered ("\"info\" must be followed by the name of an info command.\n");
2531 help_list (infolist
, "info ", -1, gdb_stdout
);
2534 /* The "complete" command is used by Emacs to implement completion. */
2538 complete_command (arg
, from_tty
)
2550 argpoint
= strlen (arg
);
2552 for (completion
= line_completion_function (arg
, i
= 0, arg
, argpoint
);
2554 completion
= line_completion_function (arg
, ++i
, arg
, argpoint
))
2556 printf_unfiltered ("%s\n", completion
);
2561 /* The "show" command with no arguments shows all the settings. */
2565 show_command (arg
, from_tty
)
2569 cmd_show_list (showlist
, from_tty
, "");
2572 /* Add an element to the list of commands. */
2575 add_com (name
, class, fun
, doc
)
2577 enum command_class
class;
2578 void (*fun
) PARAMS ((char *, int));
2581 add_cmd (name
, class, fun
, doc
, &cmdlist
);
2584 /* Add an alias or abbreviation command to the list of commands. */
2587 add_com_alias (name
, oldname
, class, abbrev_flag
)
2590 enum command_class
class;
2593 add_alias_cmd (name
, oldname
, class, abbrev_flag
, &cmdlist
);
2600 error ("Argument required (%s).", why
);
2605 help_command (command
, from_tty
)
2607 int from_tty
; /* Ignored */
2609 help_cmd (command
, gdb_stdout
);
2613 validate_comname (comname
)
2619 error_no_arg ("name of command to define");
2624 if (!isalnum(*p
) && *p
!= '-' && *p
!= '_')
2625 error ("Junk in argument list: \"%s\"", p
);
2630 /* This is just a placeholder in the command data structures. */
2632 user_defined_command (ignore
, from_tty
)
2639 define_command (comname
, from_tty
)
2643 register struct command_line
*cmds
;
2644 register struct cmd_list_element
*c
, *newc
, *hookc
= 0;
2645 char *tem
= comname
;
2647 #define HOOK_STRING "hook-"
2650 validate_comname (comname
);
2652 /* Look it up, and verify that we got an exact match. */
2653 c
= lookup_cmd (&tem
, cmdlist
, "", -1, 1);
2654 if (c
&& !STREQ (comname
, c
->name
))
2659 if (c
->class == class_user
|| c
->class == class_alias
)
2660 tem
= "Redefine command \"%s\"? ";
2662 tem
= "Really redefine built-in command \"%s\"? ";
2663 if (!query (tem
, c
->name
))
2664 error ("Command \"%s\" not redefined.", c
->name
);
2667 /* If this new command is a hook, then mark the command which it
2668 is hooking. Note that we allow hooking `help' commands, so that
2669 we can hook the `stop' pseudo-command. */
2671 if (!strncmp (comname
, HOOK_STRING
, HOOK_LEN
))
2673 /* Look up cmd it hooks, and verify that we got an exact match. */
2674 tem
= comname
+HOOK_LEN
;
2675 hookc
= lookup_cmd (&tem
, cmdlist
, "", -1, 0);
2676 if (hookc
&& !STREQ (comname
+HOOK_LEN
, hookc
->name
))
2680 warning ("Your new `%s' command does not hook any existing command.",
2682 if (!query ("Proceed? "))
2683 error ("Not confirmed.");
2687 comname
= savestring (comname
, strlen (comname
));
2689 /* If the rest of the commands will be case insensitive, this one
2690 should behave in the same manner. */
2691 for (tem
= comname
; *tem
; tem
++)
2692 if (isupper(*tem
)) *tem
= tolower(*tem
);
2695 sprintf (tmpbuf
, "Type commands for definition of \"%s\".", comname
);
2696 cmds
= read_command_lines (tmpbuf
, from_tty
);
2698 if (c
&& c
->class == class_user
)
2699 free_command_lines (&c
->user_commands
);
2701 newc
= add_cmd (comname
, class_user
, user_defined_command
,
2702 (c
&& c
->class == class_user
)
2703 ? c
->doc
: savestring ("User-defined.", 13), &cmdlist
);
2704 newc
->user_commands
= cmds
;
2706 /* If this new command is a hook, then mark both commands as being
2710 hookc
->hook
= newc
; /* Target gets hooked. */
2711 newc
->hookee
= hookc
; /* We are marked as hooking target cmd. */
2716 document_command (comname
, from_tty
)
2720 struct command_line
*doclines
;
2721 register struct cmd_list_element
*c
;
2722 char *tem
= comname
;
2725 validate_comname (comname
);
2727 c
= lookup_cmd (&tem
, cmdlist
, "", 0, 1);
2729 if (c
->class != class_user
)
2730 error ("Command \"%s\" is built-in.", comname
);
2732 sprintf (tmpbuf
, "Type documentation for \"%s\".", comname
);
2733 doclines
= read_command_lines (tmpbuf
, from_tty
);
2735 if (c
->doc
) free (c
->doc
);
2738 register struct command_line
*cl1
;
2739 register int len
= 0;
2741 for (cl1
= doclines
; cl1
; cl1
= cl1
->next
)
2742 len
+= strlen (cl1
->line
) + 1;
2744 c
->doc
= (char *) xmalloc (len
+ 1);
2747 for (cl1
= doclines
; cl1
; cl1
= cl1
->next
)
2749 strcat (c
->doc
, cl1
->line
);
2751 strcat (c
->doc
, "\n");
2755 free_command_lines (&doclines
);
2759 print_gdb_version (stream
)
2762 /* From GNU coding standards, first line is meant to be easy for a
2763 program to parse, and is just canonical program name and version
2764 number, which starts after last space. */
2766 fprintf_filtered (stream
, "GNU gdb %s\n", version
);
2768 /* Second line is a copyright notice. */
2770 fprintf_filtered (stream
, "Copyright 1996 Free Software Foundation, Inc.\n");
2772 /* Following the copyright is a brief statement that the program is
2773 free software, that users are free to copy and change it on
2774 certain conditions, that it is covered by the GNU GPL, and that
2775 there is no warranty. */
2777 fprintf_filtered (stream
, "\
2778 GDB is free software, covered by the GNU General Public License, and you are\n\
2779 welcome to change it and/or distribute copies of it under certain conditions.\n\
2780 Type \"show copying\" to see the conditions.\n\
2781 There is absolutely no warranty for GDB. Type \"show warranty\" for details.\n");
2783 /* After the required info we print the configuration information. */
2785 fprintf_filtered (stream
, "This GDB was configured as \"");
2786 if (!STREQ (host_name
, target_name
))
2788 fprintf_filtered (stream
, "--host=%s --target=%s", host_name
, target_name
);
2792 fprintf_filtered (stream
, "%s", host_name
);
2794 fprintf_filtered (stream
, "\".");
2799 show_version (args
, from_tty
)
2804 print_gdb_version (gdb_stdout
);
2805 printf_filtered ("\n");
2809 /* xgdb calls this to reprint the usual GDB prompt. Obsolete now that xgdb
2815 printf_unfiltered ("%s", prompt
);
2816 gdb_flush (gdb_stdout
);
2820 quit_command (args
, from_tty
)
2826 /* An optional expression may be used to cause gdb to terminate with the
2827 value of that expression. */
2830 value_ptr val
= parse_and_eval (args
);
2832 exit_code
= (int) value_as_long (val
);
2835 if (inferior_pid
!= 0 && target_has_execution
)
2839 if (query ("The program is running. Quit anyway (and detach it)? "))
2840 target_detach (args
, from_tty
);
2842 error ("Not confirmed.");
2846 if (query ("The program is running. Quit anyway (and kill it)? "))
2849 error ("Not confirmed.");
2852 /* UDI wants this, to kill the TIP. */
2855 /* Save the history information if it is appropriate to do so. */
2856 if (write_history_p
&& history_filename
)
2857 write_history (history_filename
);
2862 /* Returns whether GDB is running on a terminal and whether the user
2863 desires that questions be asked of them on that terminal. */
2866 input_from_terminal_p ()
2868 return gdb_has_a_terminal () && (instream
== stdin
) & caution
;
2873 pwd_command (args
, from_tty
)
2877 if (args
) error ("The \"pwd\" command does not take an argument: %s", args
);
2878 getcwd (gdb_dirbuf
, sizeof (gdb_dirbuf
));
2880 if (!STREQ (gdb_dirbuf
, current_directory
))
2881 printf_unfiltered ("Working directory %s\n (canonically %s).\n",
2882 current_directory
, gdb_dirbuf
);
2884 printf_unfiltered ("Working directory %s.\n", current_directory
);
2888 cd_command (dir
, from_tty
)
2893 /* Found something other than leading repetitions of "/..". */
2894 int found_real_path
;
2897 /* If the new directory is absolute, repeat is a no-op; if relative,
2898 repeat might be useful but is more likely to be a mistake. */
2902 error_no_arg ("new working directory");
2904 dir
= tilde_expand (dir
);
2905 make_cleanup (free
, dir
);
2907 if (chdir (dir
) < 0)
2908 perror_with_name (dir
);
2911 dir
= savestring (dir
, len
- (len
> 1 && SLASH_P(dir
[len
-1])));
2913 current_directory
= dir
;
2916 if (SLASH_P (current_directory
[0]) && current_directory
[1] == '\0')
2917 current_directory
= concat (current_directory
, dir
, NULL
);
2919 current_directory
= concat (current_directory
, SLASH_STRING
, dir
, NULL
);
2923 /* Now simplify any occurrences of `.' and `..' in the pathname. */
2925 found_real_path
= 0;
2926 for (p
= current_directory
; *p
;)
2928 if (SLASH_P (p
[0]) && p
[1] == '.' && (p
[2] == 0 || SLASH_P (p
[2])))
2930 else if (SLASH_P (p
[0]) && p
[1] == '.' && p
[2] == '.'
2931 && (p
[3] == 0 || SLASH_P (p
[3])))
2933 if (found_real_path
)
2935 /* Search backwards for the directory just before the "/.."
2936 and obliterate it and the "/..". */
2938 while (q
!= current_directory
&& ! SLASH_P (q
[-1]))
2941 if (q
== current_directory
)
2942 /* current_directory is
2943 a relative pathname ("can't happen"--leave it alone). */
2947 strcpy (q
- 1, p
+ 3);
2952 /* We are dealing with leading repetitions of "/..", for example
2953 "/../..", which is the Mach super-root. */
2958 found_real_path
= 1;
2963 forget_cached_source_info ();
2966 pwd_command ((char *) 0, 1);
2969 struct source_cleanup_lines_args
{
2972 char *old_pre_error
;
2973 char *old_error_pre_print
;
2977 source_cleanup_lines (args
)
2980 struct source_cleanup_lines_args
*p
=
2981 (struct source_cleanup_lines_args
*)args
;
2982 source_line_number
= p
->old_line
;
2983 source_file_name
= p
->old_file
;
2984 source_pre_error
= p
->old_pre_error
;
2985 error_pre_print
= p
->old_error_pre_print
;
2990 source_command (args
, from_tty
)
2995 struct cleanup
*old_cleanups
;
2997 struct source_cleanup_lines_args old_lines
;
3002 error ("source command requires pathname of file to source.");
3005 file
= tilde_expand (file
);
3006 old_cleanups
= make_cleanup (free
, file
);
3008 stream
= fopen (file
, FOPEN_RT
);
3011 perror_with_name (file
);
3015 make_cleanup (fclose
, stream
);
3017 old_lines
.old_line
= source_line_number
;
3018 old_lines
.old_file
= source_file_name
;
3019 old_lines
.old_pre_error
= source_pre_error
;
3020 old_lines
.old_error_pre_print
= error_pre_print
;
3021 make_cleanup (source_cleanup_lines
, &old_lines
);
3022 source_line_number
= 0;
3023 source_file_name
= file
;
3024 source_pre_error
= error_pre_print
== NULL
? "" : error_pre_print
;
3025 source_pre_error
= savestring (source_pre_error
, strlen (source_pre_error
));
3026 make_cleanup (free
, source_pre_error
);
3027 /* This will get set every time we read a line. So it won't stay "" for
3029 error_pre_print
= "";
3031 needed_length
= strlen (source_file_name
) + strlen (source_pre_error
) + 80;
3032 if (source_error_allocated
< needed_length
)
3034 source_error_allocated
*= 2;
3035 if (source_error_allocated
< needed_length
)
3036 source_error_allocated
= needed_length
;
3037 if (source_error
== NULL
)
3038 source_error
= xmalloc (source_error_allocated
);
3040 source_error
= xrealloc (source_error
, source_error_allocated
);
3043 read_command_file (stream
);
3045 do_cleanups (old_cleanups
);
3050 echo_command (text
, from_tty
)
3058 while ((c
= *p
++) != '\0')
3062 /* \ at end of argument is used after spaces
3063 so they won't be lost. */
3067 c
= parse_escape (&p
);
3069 printf_filtered ("%c", c
);
3072 printf_filtered ("%c", c
);
3075 /* Force this output to appear now. */
3077 gdb_flush (gdb_stdout
);
3082 dont_repeat_command (ignored
, from_tty
)
3086 *line
= 0; /* Can't call dont_repeat here because we're not
3087 necessarily reading from stdin. */
3090 #ifdef TARGET_BYTE_ORDER_SELECTABLE
3092 /* Functions to manipulate the endianness of the target. */
3094 #ifndef TARGET_BYTE_ORDER_DEFAULT
3095 #define TARGET_BYTE_ORDER_DEFAULT BIG_ENDIAN
3098 int target_byte_order
= TARGET_BYTE_ORDER_DEFAULT
;
3100 static int target_byte_order_auto
= 1;
3102 /* Called if the user enters ``set endian'' without an argument. */
3104 set_endian (args
, from_tty
)
3108 printf_unfiltered ("\"set endian\" must be followed by \"auto\", \"big\" or \"little\".\n");
3109 show_endian (args
, from_tty
);
3112 /* Called by ``set endian big''. */
3114 set_endian_big (args
, from_tty
)
3118 target_byte_order
= BIG_ENDIAN
;
3119 target_byte_order_auto
= 0;
3122 /* Called by ``set endian little''. */
3124 set_endian_little (args
, from_tty
)
3128 target_byte_order
= LITTLE_ENDIAN
;
3129 target_byte_order_auto
= 0;
3132 /* Called by ``set endian auto''. */
3134 set_endian_auto (args
, from_tty
)
3138 target_byte_order_auto
= 1;
3141 /* Called by ``show endian''. */
3143 show_endian (args
, from_tty
)
3148 (target_byte_order_auto
3149 ? "The target endianness is set automatically (currently %s endian)\n"
3150 : "The target is assumed to be %s endian\n");
3151 printf_unfiltered ((char *) msg
, TARGET_BYTE_ORDER
== BIG_ENDIAN
? "big" : "little");
3154 #endif /* defined (TARGET_BYTE_ORDER_SELECTABLE) */
3156 /* Set the endianness from a BFD. */
3158 set_endian_from_file (abfd
)
3161 #ifdef TARGET_BYTE_ORDER_SELECTABLE
3164 if (bfd_big_endian (abfd
))
3167 want
= LITTLE_ENDIAN
;
3168 if (target_byte_order_auto
)
3169 target_byte_order
= want
;
3170 else if (target_byte_order
!= want
)
3171 warning ("%s endian file does not match %s endian target.",
3172 want
== BIG_ENDIAN
? "big" : "little",
3173 TARGET_BYTE_ORDER
== BIG_ENDIAN
? "big" : "little");
3175 #else /* ! defined (TARGET_BYTE_ORDER_SELECTABLE) */
3177 if (bfd_big_endian (abfd
)
3178 ? TARGET_BYTE_ORDER
!= BIG_ENDIAN
3179 : TARGET_BYTE_ORDER
== BIG_ENDIAN
)
3180 warning ("%s endian file does not match %s endian target.",
3181 bfd_big_endian (abfd
) ? "big" : "little",
3182 TARGET_BYTE_ORDER
== BIG_ENDIAN
? "big" : "little");
3184 #endif /* ! defined (TARGET_BYTE_ORDER_SELECTABLE) */
3187 /* Functions to manipulate command line editing control variables. */
3189 /* Number of commands to print in each call to show_commands. */
3190 #define Hist_print 10
3192 show_commands (args
, from_tty
)
3196 /* Index for history commands. Relative to history_base. */
3199 /* Number of the history entry which we are planning to display next.
3200 Relative to history_base. */
3203 /* The first command in the history which doesn't exist (i.e. one more
3204 than the number of the last command). Relative to history_base. */
3207 extern HIST_ENTRY
*history_get
PARAMS ((int));
3209 /* Print out some of the commands from the command history. */
3210 /* First determine the length of the history list. */
3211 hist_len
= history_size
;
3212 for (offset
= 0; offset
< history_size
; offset
++)
3214 if (!history_get (history_base
+ offset
))
3223 if (args
[0] == '+' && args
[1] == '\0')
3224 /* "info editing +" should print from the stored position. */
3227 /* "info editing <exp>" should print around command number <exp>. */
3228 num
= (parse_and_eval_address (args
) - history_base
) - Hist_print
/ 2;
3230 /* "show commands" means print the last Hist_print commands. */
3233 num
= hist_len
- Hist_print
;
3239 /* If there are at least Hist_print commands, we want to display the last
3240 Hist_print rather than, say, the last 6. */
3241 if (hist_len
- num
< Hist_print
)
3243 num
= hist_len
- Hist_print
;
3248 for (offset
= num
; offset
< num
+ Hist_print
&& offset
< hist_len
; offset
++)
3250 printf_filtered ("%5d %s\n", history_base
+ offset
,
3251 (history_get (history_base
+ offset
))->line
);
3254 /* The next command we want to display is the next one that we haven't
3258 /* If the user repeats this command with return, it should do what
3259 "show commands +" does. This is unnecessary if arg is null,
3260 because "show commands +" is not useful after "show commands". */
3261 if (from_tty
&& args
)
3268 /* Called by do_setshow_command. */
3271 set_history_size_command (args
, from_tty
, c
)
3274 struct cmd_list_element
*c
;
3276 if (history_size
== INT_MAX
)
3277 unstifle_history ();
3278 else if (history_size
>= 0)
3279 stifle_history (history_size
);
3282 history_size
= INT_MAX
;
3283 error ("History size must be non-negative");
3289 set_history (args
, from_tty
)
3293 printf_unfiltered ("\"set history\" must be followed by the name of a history subcommand.\n");
3294 help_list (sethistlist
, "set history ", -1, gdb_stdout
);
3299 show_history (args
, from_tty
)
3303 cmd_show_list (showhistlist
, from_tty
, "");
3306 int info_verbose
= 0; /* Default verbose msgs off */
3308 /* Called by do_setshow_command. An elaborate joke. */
3311 set_verbose (args
, from_tty
, c
)
3314 struct cmd_list_element
*c
;
3316 char *cmdname
= "verbose";
3317 struct cmd_list_element
*showcmd
;
3319 showcmd
= lookup_cmd_1 (&cmdname
, showlist
, NULL
, 1);
3323 c
->doc
= "Set verbose printing of informational messages.";
3324 showcmd
->doc
= "Show verbose printing of informational messages.";
3328 c
->doc
= "Set verbosity.";
3329 showcmd
->doc
= "Show verbosity.";
3334 float_handler (signo
)
3337 /* This message is based on ANSI C, section 4.7. Note that integer
3338 divide by zero causes this, so "float" is a misnomer. */
3339 signal (SIGFPE
, float_handler
);
3340 error ("Erroneous arithmetic operation.");
3352 enablebreaklist
= NULL
;
3356 #ifdef TARGET_BYTE_ORDER_SELECTABLE
3360 showhistlist
= NULL
;
3361 unsethistlist
= NULL
;
3362 #if MAINTENANCE_CMDS
3363 maintenancelist
= NULL
;
3364 maintenanceinfolist
= NULL
;
3365 maintenanceprintlist
= NULL
;
3367 setprintlist
= NULL
;
3368 showprintlist
= NULL
;
3369 setchecklist
= NULL
;
3370 showchecklist
= NULL
;
3373 /* Init the history buffer. Note that we are called after the init file(s)
3374 * have been read so that the user can change the history file via his
3375 * .gdbinit file (for instance). The GDBHISTFILE environment variable
3376 * overrides all of this.
3384 tmpenv
= getenv ("HISTSIZE");
3386 history_size
= atoi (tmpenv
);
3387 else if (!history_size
)
3390 stifle_history (history_size
);
3392 tmpenv
= getenv ("GDBHISTFILE");
3394 history_filename
= savestring (tmpenv
, strlen(tmpenv
));
3395 else if (!history_filename
) {
3396 /* We include the current directory so that if the user changes
3397 directories the file written will be the same as the one
3399 history_filename
= concat (current_directory
, "/.gdb_history", NULL
);
3401 read_history (history_filename
);
3407 struct cmd_list_element
*c
;
3409 #ifdef TARGET_BYTE_ORDER_SELECTABLE
3411 add_prefix_cmd ("endian", class_support
, set_endian
,
3412 "Set endianness of target.",
3413 &endianlist
, "set endian ", 0, &setlist
);
3414 add_cmd ("big", class_support
, set_endian_big
,
3415 "Set target as being big endian.", &endianlist
);
3416 add_cmd ("little", class_support
, set_endian_little
,
3417 "Set target as being little endian.", &endianlist
);
3418 add_cmd ("auto", class_support
, set_endian_auto
,
3419 "Select target endianness automatically.", &endianlist
);
3420 add_cmd ("endian", class_support
, show_endian
,
3421 "Show endianness of target.", &showlist
);
3423 #endif /* defined (TARGET_BYTE_ORDER_SELECTABLE) */
3425 #ifdef DEFAULT_PROMPT
3426 prompt
= savestring (DEFAULT_PROMPT
, strlen(DEFAULT_PROMPT
));
3428 prompt
= savestring ("(gdb) ", 6);
3431 /* Set the important stuff up for command editing. */
3432 command_editing_p
= 1;
3433 history_expansion_p
= 0;
3434 write_history_p
= 0;
3436 /* Setup important stuff for command line editing. */
3437 rl_completion_entry_function
= (int (*)()) readline_line_completion_function
;
3438 rl_completer_word_break_characters
= gdb_completer_word_break_characters
;
3439 rl_completer_quote_characters
= gdb_completer_quote_characters
;
3440 rl_readline_name
= "gdb";
3442 /* Define the classes of commands.
3443 They will appear in the help list in the reverse of this order. */
3445 add_cmd ("internals", class_maintenance
, NO_FUNCTION
,
3446 "Maintenance commands.\n\
3447 Some gdb commands are provided just for use by gdb maintainers.\n\
3448 These commands are subject to frequent change, and may not be as\n\
3449 well documented as user commands.",
3451 add_cmd ("obscure", class_obscure
, NO_FUNCTION
, "Obscure features.", &cmdlist
);
3452 add_cmd ("aliases", class_alias
, NO_FUNCTION
, "Aliases of other commands.", &cmdlist
);
3453 add_cmd ("user-defined", class_user
, NO_FUNCTION
, "User-defined commands.\n\
3454 The commands in this class are those defined by the user.\n\
3455 Use the \"define\" command to define a command.", &cmdlist
);
3456 add_cmd ("support", class_support
, NO_FUNCTION
, "Support facilities.", &cmdlist
);
3457 add_cmd ("status", class_info
, NO_FUNCTION
, "Status inquiries.", &cmdlist
);
3458 add_cmd ("files", class_files
, NO_FUNCTION
, "Specifying and examining files.", &cmdlist
);
3459 add_cmd ("breakpoints", class_breakpoint
, NO_FUNCTION
, "Making program stop at certain points.", &cmdlist
);
3460 add_cmd ("data", class_vars
, NO_FUNCTION
, "Examining data.", &cmdlist
);
3461 add_cmd ("stack", class_stack
, NO_FUNCTION
, "Examining the stack.\n\
3462 The stack is made up of stack frames. Gdb assigns numbers to stack frames\n\
3463 counting from zero for the innermost (currently executing) frame.\n\n\
3464 At any time gdb identifies one frame as the \"selected\" frame.\n\
3465 Variable lookups are done with respect to the selected frame.\n\
3466 When the program being debugged stops, gdb selects the innermost frame.\n\
3467 The commands below can be used to select other frames by number or address.",
3469 add_cmd ("running", class_run
, NO_FUNCTION
, "Running the program.", &cmdlist
);
3471 add_com ("pwd", class_files
, pwd_command
,
3472 "Print working directory. This is used for your program as well.");
3473 c
= add_cmd ("cd", class_files
, cd_command
,
3474 "Set working directory to DIR for debugger and program being debugged.\n\
3475 The change does not take effect for the program being debugged\n\
3476 until the next time it is started.", &cmdlist
);
3477 c
->completer
= filename_completer
;
3480 (add_set_cmd ("prompt", class_support
, var_string
, (char *)&prompt
,
3485 add_com ("echo", class_support
, echo_command
,
3486 "Print a constant string. Give string as argument.\n\
3487 C escape sequences may be used in the argument.\n\
3488 No newline is added at the end of the argument;\n\
3489 use \"\\n\" if you want a newline to be printed.\n\
3490 Since leading and trailing whitespace are ignored in command arguments,\n\
3491 if you want to print some you must use \"\\\" before leading whitespace\n\
3492 to be printed or after trailing whitespace.");
3493 add_com ("document", class_support
, document_command
,
3494 "Document a user-defined command.\n\
3495 Give command name as argument. Give documentation on following lines.\n\
3496 End with a line of just \"end\".");
3497 add_com ("define", class_support
, define_command
,
3498 "Define a new command name. Command name is argument.\n\
3499 Definition appears on following lines, one command per line.\n\
3500 End with a line of just \"end\".\n\
3501 Use the \"document\" command to give documentation for the new command.\n\
3502 Commands defined in this way may have up to ten arguments.");
3505 c
= add_cmd ("source", class_support
, source_command
,
3506 "Read commands from a file named FILE.\n\
3507 Note that the file \"" GDBINIT_FILENAME
"\" is read automatically in this way\n\
3508 when gdb is started.", &cmdlist
);
3510 /* Punt file name, we can't help it easily. */
3511 c
= add_cmd ("source", class_support
, source_command
,
3512 "Read commands from a file named FILE.\n\
3513 Note that the file \".gdbinit\" is read automatically in this way\n\
3514 when gdb is started.", &cmdlist
);
3516 c
->completer
= filename_completer
;
3518 add_com ("quit", class_support
, quit_command
, "Exit gdb.");
3519 add_com ("help", class_support
, help_command
, "Print list of commands.");
3520 add_com_alias ("q", "quit", class_support
, 1);
3521 add_com_alias ("h", "help", class_support
, 1);
3523 add_com ("dont-repeat", class_support
, dont_repeat_command
, "Don't repeat this command.\n\
3524 Primarily used inside of user-defined commands that should not be repeated when\n\
3527 c
= add_set_cmd ("verbose", class_support
, var_boolean
, (char *)&info_verbose
,
3530 add_show_from_set (c
, &showlist
);
3531 c
->function
.sfunc
= set_verbose
;
3532 set_verbose (NULL
, 0, c
);
3535 (add_set_cmd ("editing", class_support
, var_boolean
, (char *)&command_editing_p
,
3536 "Set editing of command lines as they are typed.\n\
3537 Use \"on\" to enable to enable the editing, and \"off\" to disable it.\n\
3538 Without an argument, command line editing is enabled. To edit, use\n\
3539 EMACS-like or VI-like commands like control-P or ESC.", &setlist
),
3542 add_prefix_cmd ("history", class_support
, set_history
,
3543 "Generic command for setting command history parameters.",
3544 &sethistlist
, "set history ", 0, &setlist
);
3545 add_prefix_cmd ("history", class_support
, show_history
,
3546 "Generic command for showing command history parameters.",
3547 &showhistlist
, "show history ", 0, &showlist
);
3550 (add_set_cmd ("expansion", no_class
, var_boolean
, (char *)&history_expansion_p
,
3551 "Set history expansion on command input.\n\
3552 Without an argument, history expansion is enabled.", &sethistlist
),
3556 (add_set_cmd ("save", no_class
, var_boolean
, (char *)&write_history_p
,
3557 "Set saving of the history record on exit.\n\
3558 Use \"on\" to enable to enable the saving, and \"off\" to disable it.\n\
3559 Without an argument, saving is enabled.", &sethistlist
),
3562 c
= add_set_cmd ("size", no_class
, var_integer
, (char *)&history_size
,
3563 "Set the size of the command history, \n\
3564 ie. the number of previous commands to keep a record of.", &sethistlist
);
3565 add_show_from_set (c
, &showhistlist
);
3566 c
->function
.sfunc
= set_history_size_command
;
3569 (add_set_cmd ("filename", no_class
, var_filename
, (char *)&history_filename
,
3570 "Set the filename in which to record the command history\n\
3571 (the list of previous commands of which a record is kept).", &sethistlist
),
3575 (add_set_cmd ("confirm", class_support
, var_boolean
,
3577 "Set whether to confirm potentially dangerous operations.",
3581 add_prefix_cmd ("info", class_info
, info_command
,
3582 "Generic command for showing things about the program being debugged.",
3583 &infolist
, "info ", 0, &cmdlist
);
3584 add_com_alias ("i", "info", class_info
, 1);
3586 add_com ("complete", class_obscure
, complete_command
,
3587 "List the completions for the rest of the line as a command.");
3589 add_prefix_cmd ("show", class_info
, show_command
,
3590 "Generic command for showing things about the debugger.",
3591 &showlist
, "show ", 0, &cmdlist
);
3592 /* Another way to get at the same thing. */
3593 add_info ("set", show_command
, "Show all GDB settings.");
3595 add_cmd ("commands", no_class
, show_commands
,
3596 "Show the history of commands you typed.\n\
3597 You can supply a command number to start with, or a `+' to start after\n\
3598 the previous command number shown.",
3601 add_cmd ("version", no_class
, show_version
,
3602 "Show what version of GDB this is.", &showlist
);
3604 add_com ("while", class_support
, while_command
,
3605 "Execute nested commands WHILE the conditional expression is non zero.\n\
3606 The conditional expression must follow the word `while' and must in turn be\n\
3607 followed by a new line. The nested commands must be entered one per line,\n\
3608 and should be terminated by the word `end'.");
3610 add_com ("if", class_support
, if_command
,
3611 "Execute nested commands once IF the conditional expression is non zero.\n\
3612 The conditional expression must follow the word `if' and must in turn be\n\
3613 followed by a new line. The nested commands must be entered one per line,\n\
3614 and should be terminated by the word 'else' or `end'. If an else clause\n\
3615 is used, the same rules apply to its nested commands as to the first ones.");
3617 /* If target is open when baud changes, it doesn't take effect until the
3618 next open (I think, not sure). */
3619 add_show_from_set (add_set_cmd ("remotebaud", no_class
,
3620 var_zinteger
, (char *)&baud_rate
,
3621 "Set baud rate for remote serial I/O.\n\
3622 This value is used to set the speed of the serial port when debugging\n\
3623 using remote targets.", &setlist
),
3627 add_set_cmd ("remotedebug", no_class
, var_zinteger
, (char *)&remote_debug
,
3628 "Set debugging of remote protocol.\n\
3629 When enabled, each packet sent or received with the remote target\n\
3630 is displayed.", &setlist
),
3634 add_set_cmd ("remotetimeout", no_class
, var_integer
, (char *)&remote_timeout
,
3635 "Set timeout limit to wait for target to respond.\n\
3636 This value is used to set the time limit for gdb to wait for a response\n\
3637 from he target.", &setlist
),
3640 c
= add_set_cmd ("annotate", class_obscure
, var_zinteger
,
3641 (char *)&annotation_level
, "Set annotation_level.\n\
3642 0 == normal; 1 == fullname (for use when running under emacs)\n\
3643 2 == output annotated suitably for use by programs that control GDB.",
3645 c
= add_show_from_set (c
, &showlist
);