1 /* Top level stuff for GDB, the GNU debugger.
2 Copyright 1986, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 1998
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 char * line_completion_function
PARAMS ((char *, int, char *, int));
72 static char * readline_line_completion_function
PARAMS ((char *, int));
74 static void command_loop_marker
PARAMS ((int));
76 static void while_command
PARAMS ((char *, int));
78 static void if_command
PARAMS ((char *, int));
80 static struct command_line
*
81 build_command_line
PARAMS ((enum command_control_type
, char *));
83 static struct command_line
*
84 get_command_line
PARAMS ((enum command_control_type
, char *));
86 static void realloc_body_list
PARAMS ((struct command_line
*, int));
88 static enum misc_command_type read_next_line
PARAMS ((struct command_line
**));
90 static enum command_control_type
91 recurse_read_control_structure
PARAMS ((struct command_line
*));
93 static struct cleanup
* setup_user_args
PARAMS ((char *));
95 static char * locate_arg
PARAMS ((char *));
97 static char * insert_args
PARAMS ((char *));
99 static void arg_cleanup
PARAMS ((void));
101 static void init_main
PARAMS ((void));
103 static void init_cmd_lists
PARAMS ((void));
105 static void float_handler
PARAMS ((int));
107 static void init_signals
PARAMS ((void));
109 static void set_verbose
PARAMS ((char *, int, struct cmd_list_element
*));
111 static void set_endian
PARAMS ((char *, int));
113 static void set_endian_big
PARAMS ((char *, int));
115 static void set_endian_little
PARAMS ((char *, int));
117 static void set_endian_auto
PARAMS ((char *, int));
119 static void show_endian
PARAMS ((char *, int));
121 static void set_architecture
PARAMS ((char *, int));
123 static void show_architecture
PARAMS ((char *, int));
125 static void info_architecture
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));
159 static int quit_cover
PARAMS ((char *));
161 static void disconnect
PARAMS ((int));
164 static void source_cleanup
PARAMS ((FILE *));
166 /* If this definition isn't overridden by the header files, assume
167 that isatty and fileno exist on this system. */
169 #define ISATTY(FP) (isatty (fileno (FP)))
172 /* Initialization file name for gdb. This is overridden in some configs. */
174 #ifndef GDBINIT_FILENAME
175 #define GDBINIT_FILENAME ".gdbinit"
177 char gdbinit
[] = GDBINIT_FILENAME
;
179 int inhibit_gdbinit
= 0;
181 /* If nonzero, and GDB has been configured to be able to use windows,
182 attempt to open them upon startup. */
186 /* Version number of GDB, as a string. */
188 extern char *version
;
190 /* Canonical host name as a string. */
192 extern char *host_name
;
194 /* Canonical target name as a string. */
196 extern char *target_name
;
198 extern char lang_frame_mismatch_warn
[]; /* language.c */
200 /* Flag for whether we want all the "from_tty" gubbish printed. */
202 int caution
= 1; /* Default is yes, sigh. */
204 /* Define all cmd_list_elements. */
206 /* Chain containing all defined commands. */
208 struct cmd_list_element
*cmdlist
;
210 /* Chain containing all defined info subcommands. */
212 struct cmd_list_element
*infolist
;
214 /* Chain containing all defined enable subcommands. */
216 struct cmd_list_element
*enablelist
;
218 /* Chain containing all defined disable subcommands. */
220 struct cmd_list_element
*disablelist
;
222 /* Chain containing all defined delete subcommands. */
224 struct cmd_list_element
*deletelist
;
226 /* Chain containing all defined "enable breakpoint" subcommands. */
228 struct cmd_list_element
*enablebreaklist
;
230 /* Chain containing all defined set subcommands */
232 struct cmd_list_element
*setlist
;
234 /* Chain containing all defined unset subcommands */
236 struct cmd_list_element
*unsetlist
;
238 /* Chain containing all defined show subcommands. */
240 struct cmd_list_element
*showlist
;
242 /* Chain containing the \"set endian\" commands. */
244 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 ((char *argv0
));
383 void (*ui_loop_hook
) PARAMS ((int));
386 /* Called instead of command_loop at top level. Can be invoked via
387 return_to_top_level. */
389 void (*command_loop_hook
) PARAMS ((void));
392 /* Called instead of fputs for all output. */
394 void (*fputs_unfiltered_hook
) PARAMS ((const char *linebuffer
, FILE *stream
));
396 /* Called when the target says something to the host, which may
397 want to appear in a different window. */
399 void (*target_output_hook
) PARAMS ((char *));
401 /* Called from print_frame_info to list the line we stopped in. */
403 void (*print_frame_info_listing_hook
) PARAMS ((struct symtab
*s
, int line
,
404 int stopline
, int noerror
));
405 /* Replaces most of query. */
407 int (*query_hook
) PARAMS ((const char *, va_list));
409 /* Replaces most of warning. */
411 void (*warning_hook
) PARAMS ((const char *, va_list));
413 /* Called from gdb_flush to flush output. */
415 void (*flush_hook
) PARAMS ((FILE *stream
));
417 /* These three functions support getting lines of text from the user. They
418 are used in sequence. First readline_begin_hook is called with a text
419 string that might be (for example) a message for the user to type in a
420 sequence of commands to be executed at a breakpoint. If this function
421 calls back to a GUI, it might take this opportunity to pop up a text
422 interaction window with this message. Next, readline_hook is called
423 with a prompt that is emitted prior to collecting the user input.
424 It can be called multiple times. Finally, readline_end_hook is called
425 to notify the GUI that we are done with the interaction window and it
428 void (*readline_begin_hook
) PARAMS ((char *, ...));
429 char * (*readline_hook
) PARAMS ((char *));
430 void (*readline_end_hook
) PARAMS ((void));
432 /* Called as appropriate to notify the interface of the specified breakpoint
435 void (*create_breakpoint_hook
) PARAMS ((struct breakpoint
*bpt
));
436 void (*delete_breakpoint_hook
) PARAMS ((struct breakpoint
*bpt
));
437 void (*modify_breakpoint_hook
) PARAMS ((struct breakpoint
*bpt
));
439 /* Called during long calculations to allow GUI to repair window damage, and to
440 check for stop buttons, etc... */
442 void (*interactive_hook
) PARAMS ((void));
444 /* Called when the registers have changed, as a hint to a GUI
445 to minimize window update. */
447 void (*registers_changed_hook
) PARAMS ((void));
449 /* tell the GUI someone changed the PC */
450 void (*pc_changed_hook
) PARAMS ((void));
452 /* Called when going to wait for the target. Usually allows the GUI to run
453 while waiting for target events. */
455 int (*target_wait_hook
) PARAMS ((int pid
, struct target_waitstatus
*status
));
457 /* Used by UI as a wrapper around command execution. May do various things
458 like enabling/disabling buttons, etc... */
460 void (*call_command_hook
) PARAMS ((struct cmd_list_element
*c
, char *cmd
,
464 /* Takes control from error (). Typically used to prevent longjmps out of the
465 middle of the GUI. Usually used in conjunction with a catch routine. */
467 NORETURN
void (*error_hook
) PARAMS ((void)) ATTR_NORETURN
;
470 /* Where to go for return_to_top_level (RETURN_ERROR). */
471 SIGJMP_BUF error_return
;
472 /* Where to go for return_to_top_level (RETURN_QUIT). */
473 SIGJMP_BUF quit_return
;
475 /* Return for reason REASON. This generally gets back to the command
476 loop, but can be caught via catch_errors. */
479 return_to_top_level (reason
)
480 enum return_reason reason
;
485 /* Perhaps it would be cleaner to do this via the cleanup chain (not sure
486 I can think of a reason why that is vital, though). */
487 bpstat_clear_actions(stop_bpstat
); /* Clear queued breakpoint commands */
489 disable_current_display ();
490 do_cleanups (ALL_CLEANUPS
);
492 if (annotation_level
> 1)
503 (NORETURN
void) SIGLONGJMP
504 (reason
== RETURN_ERROR
? error_return
: quit_return
, 1);
507 /* Call FUNC with arg ARGS, catching any errors. If there is no
508 error, return the value returned by FUNC. If there is an error,
509 print ERRSTRING, print the specific error message, then return
512 Must not be called with immediate_quit in effect (bad things might
513 happen, say we got a signal in the middle of a memcpy to quit_return).
514 This is an OK restriction; with very few exceptions immediate_quit can
515 be replaced by judicious use of QUIT.
517 MASK specifies what to catch; it is normally set to
518 RETURN_MASK_ALL, if for no other reason than that the code which
519 calls catch_errors might not be set up to deal with a quit which
520 isn't caught. But if the code can deal with it, it generally
521 should be RETURN_MASK_ERROR, unless for some reason it is more
522 useful to abort only the portion of the operation inside the
523 catch_errors. Note that quit should return to the command line
524 fairly quickly, even if some further processing is being done. */
527 catch_errors (func
, args
, errstring
, mask
)
528 int (*func
) PARAMS ((char *));
533 SIGJMP_BUF saved_error
;
534 SIGJMP_BUF saved_quit
;
537 struct cleanup
*saved_cleanup_chain
;
538 char *saved_error_pre_print
;
539 char *saved_quit_pre_print
;
541 saved_cleanup_chain
= save_cleanups ();
542 saved_error_pre_print
= error_pre_print
;
543 saved_quit_pre_print
= quit_pre_print
;
545 if (mask
& RETURN_MASK_ERROR
)
547 memcpy ((char *)saved_error
, (char *)error_return
, sizeof (SIGJMP_BUF
));
548 error_pre_print
= errstring
;
550 if (mask
& RETURN_MASK_QUIT
)
552 memcpy (saved_quit
, quit_return
, sizeof (SIGJMP_BUF
));
553 quit_pre_print
= errstring
;
556 if (SIGSETJMP (tmp_jmp
) == 0)
558 if (mask
& RETURN_MASK_ERROR
)
559 memcpy (error_return
, tmp_jmp
, sizeof (SIGJMP_BUF
));
560 if (mask
& RETURN_MASK_QUIT
)
561 memcpy (quit_return
, tmp_jmp
, sizeof (SIGJMP_BUF
));
562 val
= (*func
) (args
);
567 restore_cleanups (saved_cleanup_chain
);
569 if (mask
& RETURN_MASK_ERROR
)
571 memcpy (error_return
, saved_error
, sizeof (SIGJMP_BUF
));
572 error_pre_print
= saved_error_pre_print
;
574 if (mask
& RETURN_MASK_QUIT
)
576 memcpy (quit_return
, saved_quit
, sizeof (SIGJMP_BUF
));
577 quit_pre_print
= saved_quit_pre_print
;
582 /* Handler for SIGHUP. */
589 catch_errors (quit_cover
, NULL
,
590 "Could not kill the program being debugged", RETURN_MASK_ALL
);
591 signal (SIGHUP
, SIG_DFL
);
592 kill (getpid (), SIGHUP
);
595 /* Just a little helper function for disconnect(). */
601 caution
= 0; /* Throw caution to the wind -- we're exiting.
602 This prevents asking the user dumb questions. */
603 quit_command((char *)0, 0);
606 #endif /* defined SIGHUP */
608 /* Line number we are currently in in a file which is being sourced. */
609 static int source_line_number
;
611 /* Name of the file we are sourcing. */
612 static char *source_file_name
;
614 /* Buffer containing the error_pre_print used by the source stuff.
616 static char *source_error
;
617 static int source_error_allocated
;
619 /* Something to glom on to the start of error_pre_print if source_file_name
621 static char *source_pre_error
;
623 /* Clean up on error during a "source" command (or execution of a
624 user-defined command). */
627 source_cleanup (stream
)
630 /* Restore the previous input stream. */
634 /* Read commands from STREAM. */
636 read_command_file (stream
)
639 struct cleanup
*cleanups
;
641 cleanups
= make_cleanup (source_cleanup
, instream
);
644 do_cleanups (cleanups
);
647 extern void init_proc
PARAMS ((void));
649 void (*pre_init_ui_hook
) PARAMS ((void));
655 if (pre_init_ui_hook
)
658 /* Run the init function of each source file */
660 getcwd (gdb_dirbuf
, sizeof (gdb_dirbuf
));
661 current_directory
= gdb_dirbuf
;
663 init_cmd_lists (); /* This needs to be done first */
664 initialize_targets (); /* Setup target_terminal macros for utils.c */
665 initialize_utils (); /* Make errors and warnings possible */
666 initialize_all_files ();
667 init_main (); /* But that omits this file! Do it now */
672 /* We need a default language for parsing expressions, so simple things like
673 "set width 0" won't fail if no language is explicitly set in a config file
674 or implicitly set by reading an executable during startup. */
675 set_language (language_c
);
676 expected_language
= current_language
; /* don't warn about the change. */
679 init_ui_hook (argv0
);
682 /* Allocate, initialize a new command line structure for one of the
683 control commands (if/while). */
685 static struct command_line
*
686 build_command_line (type
, args
)
687 enum command_control_type type
;
690 struct command_line
*cmd
;
693 error ("if/while commands require arguments.\n");
695 cmd
= (struct command_line
*)xmalloc (sizeof (struct command_line
));
697 cmd
->control_type
= type
;
701 = (struct command_line
**)xmalloc (sizeof (struct command_line
*)
703 memset (cmd
->body_list
, 0, sizeof (struct command_line
*) * cmd
->body_count
);
704 cmd
->line
= savestring (args
, strlen (args
));
708 /* Build and return a new command structure for the control commands
709 such as "if" and "while". */
711 static struct command_line
*
712 get_command_line (type
, arg
)
713 enum command_control_type type
;
716 struct command_line
*cmd
;
717 struct cleanup
*old_chain
= NULL
;
719 /* Allocate and build a new command line structure. */
720 cmd
= build_command_line (type
, arg
);
722 old_chain
= make_cleanup (free_command_lines
, &cmd
);
724 /* Read in the body of this command. */
725 if (recurse_read_control_structure (cmd
) == invalid_control
)
727 warning ("error reading in control structure\n");
728 do_cleanups (old_chain
);
732 discard_cleanups (old_chain
);
736 /* Recursively print a command (including full control structures). */
738 print_command_line (cmd
, depth
)
739 struct command_line
*cmd
;
746 for (i
= 0; i
< depth
; i
++)
747 fputs_filtered (" ", gdb_stdout
);
750 /* A simple command, print it and return. */
751 if (cmd
->control_type
== simple_control
)
753 fputs_filtered (cmd
->line
, gdb_stdout
);
754 fputs_filtered ("\n", gdb_stdout
);
758 /* loop_continue to jump to the start of a while loop, print it
760 if (cmd
->control_type
== continue_control
)
762 fputs_filtered ("loop_continue\n", gdb_stdout
);
766 /* loop_break to break out of a while loop, print it and return. */
767 if (cmd
->control_type
== break_control
)
769 fputs_filtered ("loop_break\n", gdb_stdout
);
773 /* A while command. Recursively print its subcommands before returning. */
774 if (cmd
->control_type
== while_control
)
776 struct command_line
*list
;
777 fputs_filtered ("while ", gdb_stdout
);
778 fputs_filtered (cmd
->line
, gdb_stdout
);
779 fputs_filtered ("\n", gdb_stdout
);
780 list
= *cmd
->body_list
;
783 print_command_line (list
, depth
+ 1);
788 /* An if command. Recursively print both arms before returning. */
789 if (cmd
->control_type
== if_control
)
791 fputs_filtered ("if ", gdb_stdout
);
792 fputs_filtered (cmd
->line
, gdb_stdout
);
793 fputs_filtered ("\n", gdb_stdout
);
795 print_command_line (cmd
->body_list
[0], depth
+ 1);
797 /* Show the false arm if it exists. */
798 if (cmd
->body_count
== 2)
802 for (i
= 0; i
< depth
; i
++)
803 fputs_filtered (" ", gdb_stdout
);
805 fputs_filtered ("else\n", gdb_stdout
);
806 print_command_line (cmd
->body_list
[1], depth
+ 1);
810 for (i
= 0; i
< depth
; i
++)
811 fputs_filtered (" ", gdb_stdout
);
813 fputs_filtered ("end\n", gdb_stdout
);
817 /* Execute the command in CMD. */
819 enum command_control_type
820 execute_control_command (cmd
)
821 struct command_line
*cmd
;
823 struct expression
*expr
;
824 struct command_line
*current
;
825 struct cleanup
*old_chain
= 0;
829 enum command_control_type ret
;
832 switch (cmd
->control_type
)
835 /* A simple command, execute it and return. */
836 new_line
= insert_args (cmd
->line
);
838 return invalid_control
;
839 old_chain
= make_cleanup (free_current_contents
, &new_line
);
840 execute_command (new_line
, 0);
841 ret
= cmd
->control_type
;
844 case continue_control
:
846 /* Return for "continue", and "break" so we can either
847 continue the loop at the top, or break out. */
848 ret
= cmd
->control_type
;
853 /* Parse the loop control expression for the while statement. */
854 new_line
= insert_args (cmd
->line
);
856 return invalid_control
;
857 old_chain
= make_cleanup (free_current_contents
, &new_line
);
858 expr
= parse_expression (new_line
);
859 make_cleanup (free_current_contents
, &expr
);
861 ret
= simple_control
;
864 /* Keep iterating so long as the expression is true. */
871 /* Evaluate the expression. */
872 val_mark
= value_mark ();
873 val
= evaluate_expression (expr
);
874 cond_result
= value_true (val
);
875 value_free_to_mark (val_mark
);
877 /* If the value is false, then break out of the loop. */
881 /* Execute the body of the while statement. */
882 current
= *cmd
->body_list
;
885 ret
= execute_control_command (current
);
887 /* If we got an error, or a "break" command, then stop
889 if (ret
== invalid_control
|| ret
== break_control
)
895 /* If we got a "continue" command, then restart the loop
897 if (ret
== continue_control
)
900 /* Get the next statement. */
901 current
= current
->next
;
905 /* Reset RET so that we don't recurse the break all the way down. */
906 if (ret
== break_control
)
907 ret
= simple_control
;
914 new_line
= insert_args (cmd
->line
);
916 return invalid_control
;
917 old_chain
= make_cleanup (free_current_contents
, &new_line
);
918 /* Parse the conditional for the if statement. */
919 expr
= parse_expression (new_line
);
920 make_cleanup (free_current_contents
, &expr
);
923 ret
= simple_control
;
925 /* Evaluate the conditional. */
926 val_mark
= value_mark ();
927 val
= evaluate_expression (expr
);
929 /* Choose which arm to take commands from based on the value of the
930 conditional expression. */
931 if (value_true (val
))
932 current
= *cmd
->body_list
;
933 else if (cmd
->body_count
== 2)
934 current
= *(cmd
->body_list
+ 1);
935 value_free_to_mark (val_mark
);
937 /* Execute commands in the given arm. */
940 ret
= execute_control_command (current
);
942 /* If we got an error, get out. */
943 if (ret
!= simple_control
)
946 /* Get the next statement in the body. */
947 current
= current
->next
;
954 warning ("Invalid control type in command structure.");
955 return invalid_control
;
959 do_cleanups (old_chain
);
964 /* "while" command support. Executes a body of statements while the
965 loop condition is nonzero. */
968 while_command (arg
, from_tty
)
972 struct command_line
*command
= NULL
;
975 command
= get_command_line (while_control
, arg
);
980 execute_control_command (command
);
981 free_command_lines (&command
);
984 /* "if" command support. Execute either the true or false arm depending
985 on the value of the if conditional. */
988 if_command (arg
, from_tty
)
992 struct command_line
*command
= NULL
;
995 command
= get_command_line (if_control
, arg
);
1000 execute_control_command (command
);
1001 free_command_lines (&command
);
1008 struct user_args
*oargs
= user_args
;
1010 fatal ("Internal error, arg_cleanup called with no user args.\n");
1012 user_args
= user_args
->next
;
1016 /* Bind the incomming arguments for a user defined command to
1017 $arg0, $arg1 ... $argMAXUSERARGS. */
1019 static struct cleanup
*
1023 struct user_args
*args
;
1024 struct cleanup
*old_chain
;
1025 unsigned int arg_count
= 0;
1027 args
= (struct user_args
*)xmalloc (sizeof (struct user_args
));
1028 memset (args
, 0, sizeof (struct user_args
));
1030 args
->next
= user_args
;
1033 old_chain
= make_cleanup (arg_cleanup
, 0);
1045 if (arg_count
>= MAXUSERARGS
)
1047 error ("user defined function may only have %d arguments.\n",
1052 /* Strip whitespace. */
1053 while (*p
== ' ' || *p
== '\t')
1056 /* P now points to an argument. */
1058 user_args
->a
[arg_count
].arg
= p
;
1060 /* Get to the end of this argument. */
1063 if (((*p
== ' ' || *p
== '\t')) && !squote
&& !dquote
&& !bsquote
)
1069 else if (*p
== '\\')
1092 user_args
->a
[arg_count
].len
= p
- start_arg
;
1099 /* Given character string P, return a point to the first argument ($arg),
1100 or NULL if P contains no arguments. */
1106 while ((p
= strchr (p
, '$')))
1108 if (strncmp (p
, "$arg", 4) == 0 && isdigit (p
[4]))
1115 /* Insert the user defined arguments stored in user_arg into the $arg
1116 arguments found in line, with the updated copy being placed into nline. */
1122 char *p
, *save_line
, *new_line
;
1125 /* First we need to know how much memory to allocate for the new line. */
1128 while ((p
= locate_arg (line
)))
1133 if (i
>= user_args
->count
)
1135 error ("Missing argument %d in user function.\n", i
);
1138 len
+= user_args
->a
[i
].len
;
1142 /* Don't forget the tail. */
1143 len
+= strlen (line
);
1145 /* Allocate space for the new line and fill it in. */
1146 new_line
= (char *)xmalloc (len
+ 1);
1147 if (new_line
== NULL
)
1150 /* Restore pointer to beginning of old line. */
1153 /* Save pointer to beginning of new line. */
1154 save_line
= new_line
;
1156 while ((p
= locate_arg (line
)))
1160 memcpy (new_line
, line
, p
- line
);
1161 new_line
+= p
- line
;
1164 len
= user_args
->a
[i
].len
;
1167 memcpy (new_line
, user_args
->a
[i
].arg
, len
);
1172 /* Don't forget the tail. */
1173 strcpy (new_line
, line
);
1175 /* Return a pointer to the beginning of the new line. */
1180 execute_user_command (c
, args
)
1181 struct cmd_list_element
*c
;
1184 register struct command_line
*cmdlines
;
1185 struct cleanup
*old_chain
;
1186 enum command_control_type ret
;
1188 old_chain
= setup_user_args (args
);
1190 cmdlines
= c
->user_commands
;
1195 /* Set the instream to 0, indicating execution of a
1196 user-defined function. */
1197 old_chain
= make_cleanup (source_cleanup
, instream
);
1198 instream
= (FILE *) 0;
1201 ret
= execute_control_command (cmdlines
);
1202 if (ret
!= simple_control
&& ret
!= break_control
)
1204 warning ("Error in control structure.\n");
1207 cmdlines
= cmdlines
->next
;
1209 do_cleanups (old_chain
);
1212 /* Execute the line P as a command.
1213 Pass FROM_TTY as second argument to the defining function. */
1216 execute_command (p
, from_tty
)
1220 register struct cmd_list_element
*c
;
1221 register enum language flang
;
1222 static int warned
= 0;
1223 /* FIXME: These should really be in an appropriate header file */
1224 extern void serial_log_command
PARAMS ((const char *));
1228 /* Force cleanup of any alloca areas if using C alloca instead of
1229 a builtin alloca. */
1232 /* This can happen when command_line_input hits end of file. */
1236 serial_log_command (p
);
1238 while (*p
== ' ' || *p
== '\t') p
++;
1243 c
= lookup_cmd (&p
, cmdlist
, "", 0, 1);
1244 /* Pass null arg rather than an empty one. */
1247 /* Clear off trailing whitespace, except for set and complete command. */
1248 if (arg
&& c
->type
!= set_cmd
&& c
->function
.cfunc
!= complete_command
)
1250 p
= arg
+ strlen (arg
) - 1;
1251 while (p
>= arg
&& (*p
== ' ' || *p
== '\t'))
1256 /* If this command has been hooked, run the hook first. */
1258 execute_user_command (c
->hook
, (char *)0);
1260 if (c
->class == class_user
)
1261 execute_user_command (c
, arg
);
1262 else if (c
->type
== set_cmd
|| c
->type
== show_cmd
)
1263 do_setshow_command (arg
, from_tty
& caution
, c
);
1264 else if (c
->function
.cfunc
== NO_FUNCTION
)
1265 error ("That is not a command, just a help topic.");
1266 else if (call_command_hook
)
1267 call_command_hook (c
, arg
, from_tty
& caution
);
1269 (*c
->function
.cfunc
) (arg
, from_tty
& caution
);
1272 /* Tell the user if the language has changed (except first time). */
1273 if (current_language
!= expected_language
)
1275 if (language_mode
== language_mode_auto
) {
1276 language_info (1); /* Print what changed. */
1281 /* Warn the user if the working language does not match the
1282 language of the current frame. Only warn the user if we are
1283 actually running the program, i.e. there is a stack. */
1284 /* FIXME: This should be cacheing the frame and only running when
1285 the frame changes. */
1287 if (target_has_stack
)
1289 flang
= get_frame_language ();
1291 && flang
!= language_unknown
1292 && flang
!= current_language
->la_language
)
1294 printf_filtered ("%s\n", lang_frame_mismatch_warn
);
1302 command_loop_marker (foo
)
1307 /* Read commands from `instream' and execute them
1308 until end of file or error reading instream. */
1313 struct cleanup
*old_chain
;
1315 int stdin_is_tty
= ISATTY (stdin
);
1316 long time_at_cmd_start
;
1318 long space_at_cmd_start
;
1320 extern int display_time
;
1321 extern int display_space
;
1323 while (instream
&& !feof (instream
))
1325 if (window_hook
&& instream
== stdin
)
1326 (*window_hook
) (instream
, prompt
);
1329 if (instream
== stdin
&& stdin_is_tty
)
1330 reinitialize_more_filter ();
1331 old_chain
= make_cleanup (command_loop_marker
, 0);
1332 command
= command_line_input (instream
== stdin
? prompt
: (char *) NULL
,
1333 instream
== stdin
, "prompt");
1337 time_at_cmd_start
= get_run_time ();
1342 extern char **environ
;
1343 char *lim
= (char *) sbrk (0);
1345 space_at_cmd_start
= (long) (lim
- (char *) &environ
);
1349 execute_command (command
, instream
== stdin
);
1350 /* Do any commands attached to breakpoint we stopped at. */
1351 bpstat_do_actions (&stop_bpstat
);
1352 do_cleanups (old_chain
);
1356 long cmd_time
= get_run_time () - time_at_cmd_start
;
1358 printf_unfiltered ("Command execution time: %ld.%06ld\n",
1359 cmd_time
/ 1000000, cmd_time
% 1000000);
1365 extern char **environ
;
1366 char *lim
= (char *) sbrk (0);
1367 long space_now
= lim
- (char *) &environ
;
1368 long space_diff
= space_now
- space_at_cmd_start
;
1370 printf_unfiltered ("Space used: %ld (%c%ld for this command)\n",
1372 (space_diff
>= 0 ? '+' : '-'),
1379 /* Commands call this if they do not want to be repeated by null lines. */
1387 /* If we aren't reading from standard input, we are saving the last
1388 thing read from stdin in line and don't want to delete it. Null lines
1389 won't repeat here in any case. */
1390 if (instream
== stdin
)
1394 /* Read a line from the stream "instream" without command line editing.
1396 It prints PRROMPT once at the start.
1397 Action is compatible with "readline", e.g. space for the result is
1398 malloc'd and should be freed by the caller.
1400 A NULL return means end of file. */
1402 gdb_readline (prrompt
)
1407 int input_index
= 0;
1408 int result_size
= 80;
1412 /* Don't use a _filtered function here. It causes the assumed
1413 character position to be off, since the newline we read from
1414 the user is not accounted for. */
1415 fputs_unfiltered (prrompt
, gdb_stdout
);
1417 /* Move to a new line so the entered line doesn't have a prompt
1418 on the front of it. */
1419 fputs_unfiltered ("\n", gdb_stdout
);
1421 gdb_flush (gdb_stdout
);
1424 result
= (char *) xmalloc (result_size
);
1428 /* Read from stdin if we are executing a user defined command.
1429 This is the right thing for prompt_for_continue, at least. */
1430 c
= fgetc (instream
? instream
: stdin
);
1434 if (input_index
> 0)
1435 /* The last line does not end with a newline. Return it, and
1436 if we are called again fgetc will still return EOF and
1437 we'll return NULL then. */
1446 result
[input_index
++] = c
;
1447 while (input_index
>= result_size
)
1450 result
= (char *) xrealloc (result
, result_size
);
1454 result
[input_index
++] = '\0';
1458 /* Variables which control command line editing and history
1459 substitution. These variables are given default values at the end
1461 static int command_editing_p
;
1462 static int history_expansion_p
;
1463 static int write_history_p
;
1464 static int history_size
;
1465 static char *history_filename
;
1467 /* readline uses the word breaks for two things:
1468 (1) In figuring out where to point the TEXT parameter to the
1469 rl_completion_entry_function. Since we don't use TEXT for much,
1470 it doesn't matter a lot what the word breaks are for this purpose, but
1471 it does affect how much stuff M-? lists.
1472 (2) If one of the matches contains a word break character, readline
1473 will quote it. That's why we switch between
1474 gdb_completer_word_break_characters and
1475 gdb_completer_command_word_break_characters. I'm not sure when
1476 we need this behavior (perhaps for funky characters in C++ symbols?). */
1478 /* Variables which are necessary for fancy command line editing. */
1479 char *gdb_completer_word_break_characters
=
1480 " \t\n!@#$%^&*()+=|~`}{[]\"';:?/>.<,-";
1482 /* When completing on command names, we remove '-' from the list of
1483 word break characters, since we use it in command names. If the
1484 readline library sees one in any of the current completion strings,
1485 it thinks that the string needs to be quoted and automatically supplies
1487 char *gdb_completer_command_word_break_characters
=
1488 " \t\n!@#$%^&*()+=|~`}{[]\"';:?/>.<,";
1490 /* Characters that can be used to quote completion strings. Note that we
1491 can't include '"' because the gdb C parser treats such quoted sequences
1493 char *gdb_completer_quote_characters
=
1496 /* Functions that are used as part of the fancy command line editing. */
1498 /* This can be used for functions which don't want to complete on symbols
1499 but don't want to complete on anything else either. */
1502 noop_completer (text
, prefix
)
1509 /* Complete on filenames. */
1511 filename_completer (text
, word
)
1515 /* From readline. */
1516 extern char *filename_completion_function
PARAMS ((char *, int));
1517 int subsequent_name
;
1519 int return_val_used
;
1520 int return_val_alloced
;
1522 return_val_used
= 0;
1523 /* Small for testing. */
1524 return_val_alloced
= 1;
1525 return_val
= (char **) xmalloc (return_val_alloced
* sizeof (char *));
1527 subsequent_name
= 0;
1531 p
= filename_completion_function (text
, subsequent_name
);
1532 if (return_val_used
>= return_val_alloced
)
1534 return_val_alloced
*= 2;
1536 (char **) xrealloc (return_val
,
1537 return_val_alloced
* sizeof (char *));
1541 return_val
[return_val_used
++] = p
;
1544 /* Like emacs, don't complete on old versions. Especially useful
1545 in the "source" command. */
1546 if (p
[strlen (p
) - 1] == '~')
1552 /* Return exactly p. */
1553 return_val
[return_val_used
++] = p
;
1554 else if (word
> text
)
1556 /* Return some portion of p. */
1557 q
= xmalloc (strlen (p
) + 5);
1558 strcpy (q
, p
+ (word
- text
));
1559 return_val
[return_val_used
++] = q
;
1564 /* Return some of TEXT plus p. */
1565 q
= xmalloc (strlen (p
) + (text
- word
) + 5);
1566 strncpy (q
, word
, text
- word
);
1567 q
[text
- word
] = '\0';
1569 return_val
[return_val_used
++] = q
;
1573 subsequent_name
= 1;
1576 /* There is no way to do this just long enough to affect quote inserting
1577 without also affecting the next completion. This should be fixed in
1579 /* Insure that readline does the right thing
1580 with respect to inserting quotes. */
1581 rl_completer_word_break_characters
= "";
1586 /* Here are some useful test cases for completion. FIXME: These should
1587 be put in the test suite. They should be tested with both M-? and TAB.
1589 "show output-" "radix"
1590 "show output" "-radix"
1591 "p" ambiguous (commands starting with p--path, print, printf, etc.)
1592 "p " ambiguous (all symbols)
1593 "info t foo" no completions
1594 "info t " no completions
1595 "info t" ambiguous ("info target", "info terminal", etc.)
1596 "info ajksdlfk" no completions
1597 "info ajksdlfk " no completions
1599 "info " ambiguous (all info commands)
1600 "p \"a" no completions (string constant)
1601 "p 'a" ambiguous (all symbols starting with a)
1602 "p b-a" ambiguous (all symbols starting with a)
1603 "p b-" ambiguous (all symbols)
1604 "file Make" "file" (word break hard to screw up here)
1605 "file ../gdb.stabs/we" "ird" (needs to not break word at slash)
1608 /* Generate completions one by one for the completer. Each time we are
1609 called return another potential completion to the caller.
1610 line_completion just completes on commands or passes the buck to the
1611 command's completer function, the stuff specific to symbol completion
1612 is in make_symbol_completion_list.
1614 TEXT is the caller's idea of the "word" we are looking at.
1616 MATCHES is the number of matches that have currently been collected from
1617 calling this completion function. When zero, then we need to initialize,
1618 otherwise the initialization has already taken place and we can just
1619 return the next potential completion string.
1621 LINE_BUFFER is available to be looked at; it contains the entire text
1622 of the line. POINT is the offset in that line of the cursor. You
1623 should pretend that the line ends at POINT.
1625 Returns NULL if there are no more completions, else a pointer to a string
1626 which is a possible completion, it is the caller's responsibility to
1630 line_completion_function (text
, matches
, line_buffer
, point
)
1636 static char **list
= (char **)NULL
; /* Cache of completions */
1637 static int index
; /* Next cached completion */
1638 char *output
= NULL
;
1639 char *tmp_command
, *p
;
1640 /* Pointer within tmp_command which corresponds to text. */
1642 struct cmd_list_element
*c
, *result_list
;
1646 /* The caller is beginning to accumulate a new set of completions, so
1647 we need to find all of them now, and cache them for returning one at
1648 a time on future calls. */
1652 /* Free the storage used by LIST, but not by the strings inside.
1653 This is because rl_complete_internal () frees the strings. */
1659 /* Choose the default set of word break characters to break completions.
1660 If we later find out that we are doing completions on command strings
1661 (as opposed to strings supplied by the individual command completer
1662 functions, which can be any string) then we will switch to the
1663 special word break set for command strings, which leaves out the
1664 '-' character used in some commands. */
1666 rl_completer_word_break_characters
=
1667 gdb_completer_word_break_characters
;
1669 /* Decide whether to complete on a list of gdb commands or on symbols. */
1670 tmp_command
= (char *) alloca (point
+ 1);
1673 strncpy (tmp_command
, line_buffer
, point
);
1674 tmp_command
[point
] = '\0';
1675 /* Since text always contains some number of characters leading up
1676 to point, we can find the equivalent position in tmp_command
1677 by subtracting that many characters from the end of tmp_command. */
1678 word
= tmp_command
+ point
- strlen (text
);
1682 /* An empty line we want to consider ambiguous; that is, it
1683 could be any command. */
1684 c
= (struct cmd_list_element
*) -1;
1689 c
= lookup_cmd_1 (&p
, cmdlist
, &result_list
, 1);
1692 /* Move p up to the next interesting thing. */
1693 while (*p
== ' ' || *p
== '\t')
1700 /* It is an unrecognized command. So there are no
1701 possible completions. */
1704 else if (c
== (struct cmd_list_element
*) -1)
1708 /* lookup_cmd_1 advances p up to the first ambiguous thing, but
1709 doesn't advance over that thing itself. Do so now. */
1711 while (*q
&& (isalnum (*q
) || *q
== '-' || *q
== '_'))
1713 if (q
!= tmp_command
+ point
)
1715 /* There is something beyond the ambiguous
1716 command, so there are no possible completions. For
1717 example, "info t " or "info t foo" does not complete
1718 to anything, because "info t" can be "info target" or
1724 /* We're trying to complete on the command which was ambiguous.
1725 This we can deal with. */
1728 list
= complete_on_cmdlist (*result_list
->prefixlist
, p
,
1733 list
= complete_on_cmdlist (cmdlist
, p
, word
);
1735 /* Insure that readline does the right thing with respect to
1736 inserting quotes. */
1737 rl_completer_word_break_characters
=
1738 gdb_completer_command_word_break_characters
;
1743 /* We've recognized a full command. */
1745 if (p
== tmp_command
+ point
)
1747 /* There is no non-whitespace in the line beyond the command. */
1749 if (p
[-1] == ' ' || p
[-1] == '\t')
1751 /* The command is followed by whitespace; we need to complete
1752 on whatever comes after command. */
1755 /* It is a prefix command; what comes after it is
1756 a subcommand (e.g. "info "). */
1757 list
= complete_on_cmdlist (*c
->prefixlist
, p
, word
);
1759 /* Insure that readline does the right thing
1760 with respect to inserting quotes. */
1761 rl_completer_word_break_characters
=
1762 gdb_completer_command_word_break_characters
;
1766 list
= complete_on_enum (c
->enums
, p
, word
);
1767 rl_completer_word_break_characters
=
1768 gdb_completer_command_word_break_characters
;
1772 /* It is a normal command; what comes after it is
1773 completed by the command's completer function. */
1774 list
= (*c
->completer
) (p
, word
);
1779 /* The command is not followed by whitespace; we need to
1780 complete on the command itself. e.g. "p" which is a
1781 command itself but also can complete to "print", "ptype"
1785 /* Find the command we are completing on. */
1787 while (q
> tmp_command
)
1789 if (isalnum (q
[-1]) || q
[-1] == '-' || q
[-1] == '_')
1795 list
= complete_on_cmdlist (result_list
, q
, word
);
1797 /* Insure that readline does the right thing
1798 with respect to inserting quotes. */
1799 rl_completer_word_break_characters
=
1800 gdb_completer_command_word_break_characters
;
1805 /* There is non-whitespace beyond the command. */
1807 if (c
->prefixlist
&& !c
->allow_unknown
)
1809 /* It is an unrecognized subcommand of a prefix command,
1810 e.g. "info adsfkdj". */
1815 list
= complete_on_enum (c
->enums
, p
, word
);
1819 /* It is a normal command. */
1820 list
= (*c
->completer
) (p
, word
);
1826 /* If we found a list of potential completions during initialization then
1827 dole them out one at a time. The vector of completions is NULL
1828 terminated, so after returning the last one, return NULL (and continue
1829 to do so) each time we are called after that, until a new list is
1834 output
= list
[index
];
1842 /* Can't do this because readline hasn't yet checked the word breaks
1843 for figuring out whether to insert a quote. */
1845 /* Make sure the word break characters are set back to normal for the
1846 next time that readline tries to complete something. */
1847 rl_completer_word_break_characters
=
1848 gdb_completer_word_break_characters
;
1854 /* Line completion interface function for readline. */
1857 readline_line_completion_function (text
, matches
)
1861 return line_completion_function (text
, matches
, rl_line_buffer
, rl_point
);
1864 /* Skip over a possibly quoted word (as defined by the quote characters
1865 and word break characters the completer uses). Returns pointer to the
1866 location after the "word". */
1872 char quote_char
= '\0';
1875 for (scan
= str
; *scan
!= '\0'; scan
++)
1877 if (quote_char
!= '\0')
1879 /* Ignore everything until the matching close quote char */
1880 if (*scan
== quote_char
)
1882 /* Found matching close quote. */
1887 else if (strchr (gdb_completer_quote_characters
, *scan
))
1889 /* Found start of a quoted string. */
1892 else if (strchr (gdb_completer_word_break_characters
, *scan
))
1906 #if STOP_SIGNAL == SIGTSTP
1907 signal (SIGTSTP
, SIG_DFL
);
1909 kill (getpid (), SIGTSTP
);
1910 signal (SIGTSTP
, stop_sig
);
1912 signal (STOP_SIGNAL
, stop_sig
);
1914 printf_unfiltered ("%s", prompt
);
1915 gdb_flush (gdb_stdout
);
1917 /* Forget about any previous command -- null line now will do nothing. */
1920 #endif /* STOP_SIGNAL */
1922 /* Initialize signal handlers. */
1927 /* Under System V the default disposition of a signal is reinstated after
1928 the signal is caught and delivered to an application process. On such
1929 systems one must restore the replacement signal handler if one wishes
1930 to continue handling the signal in one's program. On BSD systems this
1931 is not needed but it is harmless, and it simplifies the code to just do
1932 it unconditionally. */
1933 signal (signo
, do_nothing
);
1939 signal (SIGINT
, request_quit
);
1941 /* If SIGTRAP was set to SIG_IGN, then the SIG_IGN will get passed
1942 to the inferior and breakpoints will be ignored. */
1944 signal (SIGTRAP
, SIG_DFL
);
1947 /* If we initialize SIGQUIT to SIG_IGN, then the SIG_IGN will get
1948 passed to the inferior, which we don't want. It would be
1949 possible to do a "signal (SIGQUIT, SIG_DFL)" after we fork, but
1950 on BSD4.3 systems using vfork, that can affect the
1951 GDB process as well as the inferior (the signal handling tables
1952 might be in memory, shared between the two). Since we establish
1953 a handler for SIGQUIT, when we call exec it will set the signal
1954 to SIG_DFL for us. */
1955 signal (SIGQUIT
, do_nothing
);
1957 if (signal (SIGHUP
, do_nothing
) != SIG_IGN
)
1958 signal (SIGHUP
, disconnect
);
1960 signal (SIGFPE
, float_handler
);
1962 #if defined(SIGWINCH) && defined(SIGWINCH_HANDLER)
1963 signal (SIGWINCH
, SIGWINCH_HANDLER
);
1967 /* Read one line from the command input stream `instream'
1968 into the local static buffer `linebuffer' (whose current length
1970 The buffer is made bigger as necessary.
1971 Returns the address of the start of the line.
1973 NULL is returned for end of file.
1975 *If* the instream == stdin & stdin is a terminal, the line read
1976 is copied into the file line saver (global var char *line,
1977 length linesize) so that it can be duplicated.
1979 This routine either uses fancy command line editing or
1980 simple input as the user has requested. */
1983 command_line_input (prrompt
, repeat
, annotation_suffix
)
1986 char *annotation_suffix
;
1988 static char *linebuffer
= 0;
1989 static unsigned linelength
= 0;
1993 char *local_prompt
= prrompt
;
1997 /* The annotation suffix must be non-NULL. */
1998 if (annotation_suffix
== NULL
)
1999 annotation_suffix
= "";
2001 if (annotation_level
> 1 && instream
== stdin
)
2003 local_prompt
= alloca ((prrompt
== NULL
? 0 : strlen (prrompt
))
2004 + strlen (annotation_suffix
) + 40);
2005 if (prrompt
== NULL
)
2006 local_prompt
[0] = '\0';
2008 strcpy (local_prompt
, prrompt
);
2009 strcat (local_prompt
, "\n\032\032");
2010 strcat (local_prompt
, annotation_suffix
);
2011 strcat (local_prompt
, "\n");
2014 if (linebuffer
== 0)
2017 linebuffer
= (char *) xmalloc (linelength
);
2022 /* Control-C quits instantly if typed while in this loop
2023 since it should not wait until the user types a newline. */
2027 signal (STOP_SIGNAL
, stop_sig
);
2032 /* Make sure that all output has been output. Some machines may let
2033 you get away with leaving out some of the gdb_flush, but not all. */
2035 gdb_flush (gdb_stdout
);
2036 gdb_flush (gdb_stderr
);
2038 if (source_file_name
!= NULL
)
2040 ++source_line_number
;
2041 sprintf (source_error
,
2042 "%s%s:%d: Error in sourced command file:\n",
2045 source_line_number
);
2046 error_pre_print
= source_error
;
2049 if (annotation_level
> 1 && instream
== stdin
)
2051 printf_unfiltered ("\n\032\032pre-");
2052 printf_unfiltered (annotation_suffix
);
2053 printf_unfiltered ("\n");
2056 /* Don't use fancy stuff if not talking to stdin. */
2057 if (readline_hook
&& instream
== NULL
)
2059 rl
= (*readline_hook
) (local_prompt
);
2061 else if (command_editing_p
&& instream
== stdin
&& ISATTY (instream
))
2063 rl
= readline (local_prompt
);
2067 rl
= gdb_readline (local_prompt
);
2070 if (annotation_level
> 1 && instream
== stdin
)
2072 printf_unfiltered ("\n\032\032post-");
2073 printf_unfiltered (annotation_suffix
);
2074 printf_unfiltered ("\n");
2077 if (!rl
|| rl
== (char *) EOF
)
2082 if (strlen(rl
) + 1 + (p
- linebuffer
) > linelength
)
2084 linelength
= strlen(rl
) + 1 + (p
- linebuffer
);
2085 nline
= (char *) xrealloc (linebuffer
, linelength
);
2086 p
+= nline
- linebuffer
;
2090 /* Copy line. Don't copy null at end. (Leaves line alone
2091 if this was just a newline) */
2095 free (rl
); /* Allocated in readline. */
2097 if (p
== linebuffer
|| *(p
- 1) != '\\')
2100 p
--; /* Put on top of '\'. */
2101 local_prompt
= (char *) 0;
2106 signal (STOP_SIGNAL
, SIG_DFL
);
2113 #define SERVER_COMMAND_LENGTH 7
2115 (p
- linebuffer
> SERVER_COMMAND_LENGTH
)
2116 && STREQN (linebuffer
, "server ", SERVER_COMMAND_LENGTH
);
2119 /* Note that we don't set `line'. Between this and the check in
2120 dont_repeat, this insures that repeating will still do the
2123 return linebuffer
+ SERVER_COMMAND_LENGTH
;
2126 /* Do history expansion if that is wished. */
2127 if (history_expansion_p
&& instream
== stdin
2128 && ISATTY (instream
))
2130 char *history_value
;
2133 *p
= '\0'; /* Insert null now. */
2134 expanded
= history_expand (linebuffer
, &history_value
);
2137 /* Print the changes. */
2138 printf_unfiltered ("%s\n", history_value
);
2140 /* If there was an error, call this function again. */
2143 free (history_value
);
2144 return command_line_input (prrompt
, repeat
, annotation_suffix
);
2146 if (strlen (history_value
) > linelength
)
2148 linelength
= strlen (history_value
) + 1;
2149 linebuffer
= (char *) xrealloc (linebuffer
, linelength
);
2151 strcpy (linebuffer
, history_value
);
2152 p
= linebuffer
+ strlen(linebuffer
);
2153 free (history_value
);
2157 /* If we just got an empty line, and that is supposed
2158 to repeat the previous command, return the value in the
2160 if (repeat
&& p
== linebuffer
)
2162 for (p1
= linebuffer
; *p1
== ' ' || *p1
== '\t'; p1
++) ;
2168 /* Add line to history if appropriate. */
2169 if (instream
== stdin
2170 && ISATTY (stdin
) && *linebuffer
)
2171 add_history (linebuffer
);
2173 /* Note: lines consisting solely of comments are added to the command
2174 history. This is useful when you type a command, and then
2175 realize you don't want to execute it quite yet. You can comment
2176 out the command and then later fetch it from the value history
2177 and remove the '#'. The kill ring is probably better, but some
2178 people are in the habit of commenting things out. */
2180 *p1
= '\0'; /* Found a comment. */
2182 /* Save into global buffer if appropriate. */
2185 if (linelength
> linesize
)
2187 line
= xrealloc (line
, linelength
);
2188 linesize
= linelength
;
2190 strcpy (line
, linebuffer
);
2198 /* Expand the body_list of COMMAND so that it can hold NEW_LENGTH
2199 code bodies. This is typically used when we encounter an "else"
2200 clause for an "if" command. */
2203 realloc_body_list (command
, new_length
)
2204 struct command_line
*command
;
2208 struct command_line
**body_list
;
2210 n
= command
->body_count
;
2212 /* Nothing to do? */
2213 if (new_length
<= n
)
2216 body_list
= (struct command_line
**)
2217 xmalloc (sizeof (struct command_line
*) * new_length
);
2219 memcpy (body_list
, command
->body_list
, sizeof (struct command_line
*) * n
);
2221 free (command
->body_list
);
2222 command
->body_list
= body_list
;
2223 command
->body_count
= new_length
;
2226 /* Read one line from the input stream. If the command is an "else" or
2227 "end", return such an indication to the caller. */
2229 static enum misc_command_type
2230 read_next_line (command
)
2231 struct command_line
**command
;
2233 char *p
, *p1
, *prompt_ptr
, control_prompt
[256];
2236 if (control_level
>= 254)
2237 error ("Control nesting too deep!\n");
2239 /* Set a prompt based on the nesting of the control commands. */
2240 if (instream
== stdin
|| (instream
== 0 && readline_hook
!= NULL
))
2242 for (i
= 0; i
< control_level
; i
++)
2243 control_prompt
[i
] = ' ';
2244 control_prompt
[i
] = '>';
2245 control_prompt
[i
+1] = '\0';
2246 prompt_ptr
= (char *)&control_prompt
[0];
2251 p
= command_line_input (prompt_ptr
, instream
== stdin
, "commands");
2253 /* Not sure what to do here. */
2257 /* Strip leading and trailing whitespace. */
2258 while (*p
== ' ' || *p
== '\t')
2261 p1
= p
+ strlen (p
);
2262 while (p1
!= p
&& (p1
[-1] == ' ' || p1
[-1] == '\t'))
2265 /* Blanks and comments don't really do anything, but we need to
2266 distinguish them from else, end and other commands which can be
2268 if (p1
== p
|| p
[0] == '#')
2271 /* Is this the end of a simple, while, or if control structure? */
2272 if (p1
- p
== 3 && !strncmp (p
, "end", 3))
2275 /* Is the else clause of an if control structure? */
2276 if (p1
- p
== 4 && !strncmp (p
, "else", 4))
2277 return else_command
;
2279 /* Check for while, if, break, continue, etc and build a new command
2280 line structure for them. */
2281 if (p1
- p
> 5 && !strncmp (p
, "while", 5))
2282 *command
= build_command_line (while_control
, p
+ 6);
2283 else if (p1
- p
> 2 && !strncmp (p
, "if", 2))
2284 *command
= build_command_line (if_control
, p
+ 3);
2285 else if (p1
- p
== 10 && !strncmp (p
, "loop_break", 10))
2287 *command
= (struct command_line
*)
2288 xmalloc (sizeof (struct command_line
));
2289 (*command
)->next
= NULL
;
2290 (*command
)->line
= NULL
;
2291 (*command
)->control_type
= break_control
;
2292 (*command
)->body_count
= 0;
2293 (*command
)->body_list
= NULL
;
2295 else if (p1
- p
== 13 && !strncmp (p
, "loop_continue", 13))
2297 *command
= (struct command_line
*)
2298 xmalloc (sizeof (struct command_line
));
2299 (*command
)->next
= NULL
;
2300 (*command
)->line
= NULL
;
2301 (*command
)->control_type
= continue_control
;
2302 (*command
)->body_count
= 0;
2303 (*command
)->body_list
= NULL
;
2307 /* A normal command. */
2308 *command
= (struct command_line
*)
2309 xmalloc (sizeof (struct command_line
));
2310 (*command
)->next
= NULL
;
2311 (*command
)->line
= savestring (p
, p1
- p
);
2312 (*command
)->control_type
= simple_control
;
2313 (*command
)->body_count
= 0;
2314 (*command
)->body_list
= NULL
;
2317 /* Nothing special. */
2321 /* Recursively read in the control structures and create a command_line
2322 structure from them.
2324 The parent_control parameter is the control structure in which the
2325 following commands are nested. */
2327 static enum command_control_type
2328 recurse_read_control_structure (current_cmd
)
2329 struct command_line
*current_cmd
;
2331 int current_body
, i
;
2332 enum misc_command_type val
;
2333 enum command_control_type ret
;
2334 struct command_line
**body_ptr
, *child_tail
, *next
;
2339 /* Sanity checks. */
2340 if (current_cmd
->control_type
== simple_control
)
2342 error ("Recursed on a simple control type\n");
2343 return invalid_control
;
2346 if (current_body
> current_cmd
->body_count
)
2348 error ("Allocated body is smaller than this command type needs\n");
2349 return invalid_control
;
2352 /* Read lines from the input stream and build control structures. */
2358 val
= read_next_line (&next
);
2360 /* Just skip blanks and comments. */
2361 if (val
== nop_command
)
2364 if (val
== end_command
)
2366 if (current_cmd
->control_type
== while_control
2367 || current_cmd
->control_type
== if_control
)
2369 /* Success reading an entire control structure. */
2370 ret
= simple_control
;
2375 ret
= invalid_control
;
2380 /* Not the end of a control structure. */
2381 if (val
== else_command
)
2383 if (current_cmd
->control_type
== if_control
2384 && current_body
== 1)
2386 realloc_body_list (current_cmd
, 2);
2393 ret
= invalid_control
;
2400 child_tail
->next
= next
;
2404 body_ptr
= current_cmd
->body_list
;
2405 for (i
= 1; i
< current_body
; i
++)
2414 /* If the latest line is another control structure, then recurse
2416 if (next
->control_type
== while_control
2417 || next
->control_type
== if_control
)
2420 ret
= recurse_read_control_structure (next
);
2423 if (ret
!= simple_control
)
2433 /* Read lines from the input stream and accumulate them in a chain of
2434 struct command_line's, which is then returned. For input from a
2435 terminal, the special command "end" is used to mark the end of the
2436 input, and is not included in the returned chain of commands. */
2438 #define END_MESSAGE "End with a line saying just \"end\"."
2440 struct command_line
*
2441 read_command_lines (prompt
, from_tty
)
2445 struct command_line
*head
, *tail
, *next
;
2446 struct cleanup
*old_chain
;
2447 enum command_control_type ret
;
2448 enum misc_command_type val
;
2450 if (readline_begin_hook
)
2452 /* Note - intentional to merge messages with no newline */
2453 (*readline_begin_hook
) ("%s %s\n", prompt
, END_MESSAGE
);
2455 else if (from_tty
&& input_from_terminal_p ())
2457 printf_unfiltered ("%s\n%s\n", prompt
, END_MESSAGE
);
2458 gdb_flush (gdb_stdout
);
2466 val
= read_next_line (&next
);
2468 /* Ignore blank lines or comments. */
2469 if (val
== nop_command
)
2472 if (val
== end_command
)
2474 ret
= simple_control
;
2478 if (val
!= ok_command
)
2480 ret
= invalid_control
;
2484 if (next
->control_type
== while_control
2485 || next
->control_type
== if_control
)
2488 ret
= recurse_read_control_structure (next
);
2491 if (ret
== invalid_control
)
2502 old_chain
= make_cleanup (free_command_lines
, &head
);
2511 if (ret
!= invalid_control
)
2513 discard_cleanups (old_chain
);
2516 do_cleanups (old_chain
);
2519 if (readline_end_hook
)
2521 (*readline_end_hook
) ();
2526 /* Free a chain of struct command_line's. */
2529 free_command_lines (lptr
)
2530 struct command_line
**lptr
;
2532 register struct command_line
*l
= *lptr
;
2533 register struct command_line
*next
;
2534 struct command_line
**blist
;
2539 if (l
->body_count
> 0)
2541 blist
= l
->body_list
;
2542 for (i
= 0; i
< l
->body_count
; i
++, blist
++)
2543 free_command_lines (blist
);
2552 /* Add an element to the list of info subcommands. */
2555 add_info (name
, fun
, doc
)
2557 void (*fun
) PARAMS ((char *, int));
2560 add_cmd (name
, no_class
, fun
, doc
, &infolist
);
2563 /* Add an alias to the list of info subcommands. */
2566 add_info_alias (name
, oldname
, abbrev_flag
)
2571 add_alias_cmd (name
, oldname
, 0, abbrev_flag
, &infolist
);
2574 /* The "info" command is defined as a prefix, with allow_unknown = 0.
2575 Therefore, its own definition is called only for "info" with no args. */
2579 info_command (arg
, from_tty
)
2583 printf_unfiltered ("\"info\" must be followed by the name of an info command.\n");
2584 help_list (infolist
, "info ", -1, gdb_stdout
);
2587 /* The "complete" command is used by Emacs to implement completion. */
2591 complete_command (arg
, from_tty
)
2603 argpoint
= strlen (arg
);
2605 for (completion
= line_completion_function (arg
, i
= 0, arg
, argpoint
);
2607 completion
= line_completion_function (arg
, ++i
, arg
, argpoint
))
2609 printf_unfiltered ("%s\n", completion
);
2614 /* The "show" command with no arguments shows all the settings. */
2618 show_command (arg
, from_tty
)
2622 cmd_show_list (showlist
, from_tty
, "");
2625 /* Add an element to the list of commands. */
2628 add_com (name
, class, fun
, doc
)
2630 enum command_class
class;
2631 void (*fun
) PARAMS ((char *, int));
2634 add_cmd (name
, class, fun
, doc
, &cmdlist
);
2637 /* Add an alias or abbreviation command to the list of commands. */
2640 add_com_alias (name
, oldname
, class, abbrev_flag
)
2643 enum command_class
class;
2646 add_alias_cmd (name
, oldname
, class, abbrev_flag
, &cmdlist
);
2653 error ("Argument required (%s).", why
);
2658 help_command (command
, from_tty
)
2660 int from_tty
; /* Ignored */
2662 help_cmd (command
, gdb_stdout
);
2666 validate_comname (comname
)
2672 error_no_arg ("name of command to define");
2677 if (!isalnum(*p
) && *p
!= '-' && *p
!= '_')
2678 error ("Junk in argument list: \"%s\"", p
);
2683 /* This is just a placeholder in the command data structures. */
2685 user_defined_command (ignore
, from_tty
)
2692 define_command (comname
, from_tty
)
2696 register struct command_line
*cmds
;
2697 register struct cmd_list_element
*c
, *newc
, *hookc
= 0;
2698 char *tem
= comname
;
2700 #define HOOK_STRING "hook-"
2703 validate_comname (comname
);
2705 /* Look it up, and verify that we got an exact match. */
2706 c
= lookup_cmd (&tem
, cmdlist
, "", -1, 1);
2707 if (c
&& !STREQ (comname
, c
->name
))
2712 if (c
->class == class_user
|| c
->class == class_alias
)
2713 tem
= "Redefine command \"%s\"? ";
2715 tem
= "Really redefine built-in command \"%s\"? ";
2716 if (!query (tem
, c
->name
))
2717 error ("Command \"%s\" not redefined.", c
->name
);
2720 /* If this new command is a hook, then mark the command which it
2721 is hooking. Note that we allow hooking `help' commands, so that
2722 we can hook the `stop' pseudo-command. */
2724 if (!strncmp (comname
, HOOK_STRING
, HOOK_LEN
))
2726 /* Look up cmd it hooks, and verify that we got an exact match. */
2727 tem
= comname
+HOOK_LEN
;
2728 hookc
= lookup_cmd (&tem
, cmdlist
, "", -1, 0);
2729 if (hookc
&& !STREQ (comname
+HOOK_LEN
, hookc
->name
))
2733 warning ("Your new `%s' command does not hook any existing command.",
2735 if (!query ("Proceed? "))
2736 error ("Not confirmed.");
2740 comname
= savestring (comname
, strlen (comname
));
2742 /* If the rest of the commands will be case insensitive, this one
2743 should behave in the same manner. */
2744 for (tem
= comname
; *tem
; tem
++)
2745 if (isupper(*tem
)) *tem
= tolower(*tem
);
2748 sprintf (tmpbuf
, "Type commands for definition of \"%s\".", comname
);
2749 cmds
= read_command_lines (tmpbuf
, from_tty
);
2751 if (c
&& c
->class == class_user
)
2752 free_command_lines (&c
->user_commands
);
2754 newc
= add_cmd (comname
, class_user
, user_defined_command
,
2755 (c
&& c
->class == class_user
)
2756 ? c
->doc
: savestring ("User-defined.", 13), &cmdlist
);
2757 newc
->user_commands
= cmds
;
2759 /* If this new command is a hook, then mark both commands as being
2763 hookc
->hook
= newc
; /* Target gets hooked. */
2764 newc
->hookee
= hookc
; /* We are marked as hooking target cmd. */
2769 document_command (comname
, from_tty
)
2773 struct command_line
*doclines
;
2774 register struct cmd_list_element
*c
;
2775 char *tem
= comname
;
2778 validate_comname (comname
);
2780 c
= lookup_cmd (&tem
, cmdlist
, "", 0, 1);
2782 if (c
->class != class_user
)
2783 error ("Command \"%s\" is built-in.", comname
);
2785 sprintf (tmpbuf
, "Type documentation for \"%s\".", comname
);
2786 doclines
= read_command_lines (tmpbuf
, from_tty
);
2788 if (c
->doc
) free (c
->doc
);
2791 register struct command_line
*cl1
;
2792 register int len
= 0;
2794 for (cl1
= doclines
; cl1
; cl1
= cl1
->next
)
2795 len
+= strlen (cl1
->line
) + 1;
2797 c
->doc
= (char *) xmalloc (len
+ 1);
2800 for (cl1
= doclines
; cl1
; cl1
= cl1
->next
)
2802 strcat (c
->doc
, cl1
->line
);
2804 strcat (c
->doc
, "\n");
2808 free_command_lines (&doclines
);
2812 print_gdb_version (stream
)
2815 /* From GNU coding standards, first line is meant to be easy for a
2816 program to parse, and is just canonical program name and version
2817 number, which starts after last space. */
2819 fprintf_filtered (stream
, "GNU gdb %s\n", version
);
2821 /* Second line is a copyright notice. */
2823 fprintf_filtered (stream
, "Copyright 1998 Free Software Foundation, Inc.\n");
2825 /* Following the copyright is a brief statement that the program is
2826 free software, that users are free to copy and change it on
2827 certain conditions, that it is covered by the GNU GPL, and that
2828 there is no warranty. */
2830 fprintf_filtered (stream
, "\
2831 GDB is free software, covered by the GNU General Public License, and you are\n\
2832 welcome to change it and/or distribute copies of it under certain conditions.\n\
2833 Type \"show copying\" to see the conditions.\n\
2834 There is absolutely no warranty for GDB. Type \"show warranty\" for details.\n");
2836 /* After the required info we print the configuration information. */
2838 fprintf_filtered (stream
, "This GDB was configured as \"");
2839 if (!STREQ (host_name
, target_name
))
2841 fprintf_filtered (stream
, "--host=%s --target=%s", host_name
, target_name
);
2845 fprintf_filtered (stream
, "%s", host_name
);
2847 fprintf_filtered (stream
, "\".");
2852 show_version (args
, from_tty
)
2857 print_gdb_version (gdb_stdout
);
2858 printf_filtered ("\n");
2862 /* xgdb calls this to reprint the usual GDB prompt. Obsolete now that xgdb
2868 printf_unfiltered ("%s", prompt
);
2869 gdb_flush (gdb_stdout
);
2872 /* This replaces the above for the frontends: it returns a pointer
2880 /* If necessary, make the user confirm that we should quit. Return
2881 non-zero if we should quit, zero if we shouldn't. */
2886 if (inferior_pid
!= 0 && target_has_execution
)
2890 /* This is something of a hack. But there's no reliable way to
2891 see if a GUI is running. The `use_windows' variable doesn't
2894 s
= "A debugging session is active.\nDo you still want to close the debugger?";
2895 else if (attach_flag
)
2896 s
= "The program is running. Quit anyway (and detach it)? ";
2898 s
= "The program is running. Exit anyway? ";
2907 /* Quit without asking for confirmation. */
2910 quit_force (args
, from_tty
)
2916 /* An optional expression may be used to cause gdb to terminate with the
2917 value of that expression. */
2920 value_ptr val
= parse_and_eval (args
);
2922 exit_code
= (int) value_as_long (val
);
2925 if (inferior_pid
!= 0 && target_has_execution
)
2928 target_detach (args
, from_tty
);
2933 /* UDI wants this, to kill the TIP. */
2936 /* Save the history information if it is appropriate to do so. */
2937 if (write_history_p
&& history_filename
)
2938 write_history (history_filename
);
2940 do_final_cleanups(ALL_CLEANUPS
); /* Do any final cleanups before exiting */
2945 /* Handle the quit command. */
2948 quit_command (args
, from_tty
)
2952 if (! quit_confirm ())
2953 error ("Not confirmed.");
2954 quit_force (args
, from_tty
);
2957 /* Returns whether GDB is running on a terminal and whether the user
2958 desires that questions be asked of them on that terminal. */
2961 input_from_terminal_p ()
2963 return gdb_has_a_terminal () && (instream
== stdin
) & caution
;
2968 pwd_command (args
, from_tty
)
2972 if (args
) error ("The \"pwd\" command does not take an argument: %s", args
);
2973 getcwd (gdb_dirbuf
, sizeof (gdb_dirbuf
));
2975 if (!STREQ (gdb_dirbuf
, current_directory
))
2976 printf_unfiltered ("Working directory %s\n (canonically %s).\n",
2977 current_directory
, gdb_dirbuf
);
2979 printf_unfiltered ("Working directory %s.\n", current_directory
);
2983 cd_command (dir
, from_tty
)
2988 /* Found something other than leading repetitions of "/..". */
2989 int found_real_path
;
2992 /* If the new directory is absolute, repeat is a no-op; if relative,
2993 repeat might be useful but is more likely to be a mistake. */
2997 error_no_arg ("new working directory");
2999 dir
= tilde_expand (dir
);
3000 make_cleanup (free
, dir
);
3002 if (chdir (dir
) < 0)
3003 perror_with_name (dir
);
3006 dir
= savestring (dir
, len
- (len
> 1 && SLASH_P(dir
[len
-1])));
3008 current_directory
= dir
;
3011 if (SLASH_P (current_directory
[0]) && current_directory
[1] == '\0')
3012 current_directory
= concat (current_directory
, dir
, NULL
);
3014 current_directory
= concat (current_directory
, SLASH_STRING
, dir
, NULL
);
3018 /* Now simplify any occurrences of `.' and `..' in the pathname. */
3020 found_real_path
= 0;
3021 for (p
= current_directory
; *p
;)
3023 if (SLASH_P (p
[0]) && p
[1] == '.' && (p
[2] == 0 || SLASH_P (p
[2])))
3025 else if (SLASH_P (p
[0]) && p
[1] == '.' && p
[2] == '.'
3026 && (p
[3] == 0 || SLASH_P (p
[3])))
3028 if (found_real_path
)
3030 /* Search backwards for the directory just before the "/.."
3031 and obliterate it and the "/..". */
3033 while (q
!= current_directory
&& ! SLASH_P (q
[-1]))
3036 if (q
== current_directory
)
3037 /* current_directory is
3038 a relative pathname ("can't happen"--leave it alone). */
3042 strcpy (q
- 1, p
+ 3);
3047 /* We are dealing with leading repetitions of "/..", for example
3048 "/../..", which is the Mach super-root. */
3053 found_real_path
= 1;
3058 forget_cached_source_info ();
3061 pwd_command ((char *) 0, 1);
3064 struct source_cleanup_lines_args
{
3067 char *old_pre_error
;
3068 char *old_error_pre_print
;
3072 source_cleanup_lines (args
)
3075 struct source_cleanup_lines_args
*p
=
3076 (struct source_cleanup_lines_args
*)args
;
3077 source_line_number
= p
->old_line
;
3078 source_file_name
= p
->old_file
;
3079 source_pre_error
= p
->old_pre_error
;
3080 error_pre_print
= p
->old_error_pre_print
;
3085 source_command (args
, from_tty
)
3090 struct cleanup
*old_cleanups
;
3092 struct source_cleanup_lines_args old_lines
;
3097 error ("source command requires pathname of file to source.");
3100 file
= tilde_expand (file
);
3101 old_cleanups
= make_cleanup (free
, file
);
3103 stream
= fopen (file
, FOPEN_RT
);
3106 perror_with_name (file
);
3110 make_cleanup (fclose
, stream
);
3112 old_lines
.old_line
= source_line_number
;
3113 old_lines
.old_file
= source_file_name
;
3114 old_lines
.old_pre_error
= source_pre_error
;
3115 old_lines
.old_error_pre_print
= error_pre_print
;
3116 make_cleanup (source_cleanup_lines
, &old_lines
);
3117 source_line_number
= 0;
3118 source_file_name
= file
;
3119 source_pre_error
= error_pre_print
== NULL
? "" : error_pre_print
;
3120 source_pre_error
= savestring (source_pre_error
, strlen (source_pre_error
));
3121 make_cleanup (free
, source_pre_error
);
3122 /* This will get set every time we read a line. So it won't stay "" for
3124 error_pre_print
= "";
3126 needed_length
= strlen (source_file_name
) + strlen (source_pre_error
) + 80;
3127 if (source_error_allocated
< needed_length
)
3129 source_error_allocated
*= 2;
3130 if (source_error_allocated
< needed_length
)
3131 source_error_allocated
= needed_length
;
3132 if (source_error
== NULL
)
3133 source_error
= xmalloc (source_error_allocated
);
3135 source_error
= xrealloc (source_error
, source_error_allocated
);
3138 read_command_file (stream
);
3140 do_cleanups (old_cleanups
);
3145 echo_command (text
, from_tty
)
3153 while ((c
= *p
++) != '\0')
3157 /* \ at end of argument is used after spaces
3158 so they won't be lost. */
3162 c
= parse_escape (&p
);
3164 printf_filtered ("%c", c
);
3167 printf_filtered ("%c", c
);
3170 /* Force this output to appear now. */
3172 gdb_flush (gdb_stdout
);
3177 dont_repeat_command (ignored
, from_tty
)
3181 *line
= 0; /* Can't call dont_repeat here because we're not
3182 necessarily reading from stdin. */
3185 /* Functions to manipulate the endianness of the target. */
3187 #ifdef TARGET_BYTE_ORDER_SELECTABLE
3188 #ifndef TARGET_BYTE_ORDER_DEFAULT
3189 #define TARGET_BYTE_ORDER_DEFAULT BIG_ENDIAN
3191 int target_byte_order
= TARGET_BYTE_ORDER_DEFAULT
;
3192 int target_byte_order_auto
= 1;
3194 static int target_byte_order_auto
= 0;
3197 /* Called if the user enters ``set endian'' without an argument. */
3199 set_endian (args
, from_tty
)
3203 printf_unfiltered ("\"set endian\" must be followed by \"auto\", \"big\" or \"little\".\n");
3204 show_endian (args
, from_tty
);
3207 /* Called by ``set endian big''. */
3209 set_endian_big (args
, from_tty
)
3213 #ifdef TARGET_BYTE_ORDER_SELECTABLE
3214 target_byte_order
= BIG_ENDIAN
;
3215 target_byte_order_auto
= 0;
3217 printf_unfiltered ("Byte order is not selectable.");
3218 show_endian (args
, from_tty
);
3222 /* Called by ``set endian little''. */
3224 set_endian_little (args
, from_tty
)
3228 #ifdef TARGET_BYTE_ORDER_SELECTABLE
3229 target_byte_order
= LITTLE_ENDIAN
;
3230 target_byte_order_auto
= 0;
3232 printf_unfiltered ("Byte order is not selectable.");
3233 show_endian (args
, from_tty
);
3237 /* Called by ``set endian auto''. */
3239 set_endian_auto (args
, from_tty
)
3243 #ifdef TARGET_BYTE_ORDER_SELECTABLE
3244 target_byte_order_auto
= 1;
3246 printf_unfiltered ("Byte order is not selectable.");
3247 show_endian (args
, from_tty
);
3251 /* Called by ``show endian''. */
3253 show_endian (args
, from_tty
)
3258 (target_byte_order_auto
3259 ? "The target endianness is set automatically (currently %s endian)\n"
3260 : "The target is assumed to be %s endian\n");
3261 printf_unfiltered ((char *) msg
, TARGET_BYTE_ORDER
== BIG_ENDIAN
? "big" : "little");
3264 /* Set the endianness from a BFD. */
3266 set_endian_from_file (abfd
)
3269 #ifdef TARGET_BYTE_ORDER_SELECTABLE
3272 if (bfd_big_endian (abfd
))
3275 want
= LITTLE_ENDIAN
;
3276 if (target_byte_order_auto
)
3277 target_byte_order
= want
;
3278 else if (target_byte_order
!= want
)
3279 warning ("%s endian file does not match %s endian target.",
3280 want
== BIG_ENDIAN
? "big" : "little",
3281 TARGET_BYTE_ORDER
== BIG_ENDIAN
? "big" : "little");
3283 #else /* ! defined (TARGET_BYTE_ORDER_SELECTABLE) */
3285 if (bfd_big_endian (abfd
)
3286 ? TARGET_BYTE_ORDER
!= BIG_ENDIAN
3287 : TARGET_BYTE_ORDER
== BIG_ENDIAN
)
3288 warning ("%s endian file does not match %s endian target.",
3289 bfd_big_endian (abfd
) ? "big" : "little",
3290 TARGET_BYTE_ORDER
== BIG_ENDIAN
? "big" : "little");
3292 #endif /* ! defined (TARGET_BYTE_ORDER_SELECTABLE) */
3295 /* Functions to manipulate the architecture of the target */
3297 int target_architecture_auto
= 1;
3298 extern const bfd_arch_info_type bfd_default_arch_struct
;
3299 const bfd_arch_info_type
*target_architecture
= &bfd_default_arch_struct
;
3300 int (*target_architecture_hook
) PARAMS ((const bfd_arch_info_type
*ap
));
3304 const bfd_arch_info_type
*arch
;
3306 /* FIXME: Is it compatible with gdb? */
3307 /* Check with the target on the setting */
3308 if (target_architecture_hook
!= NULL
3309 && !target_architecture_hook (arch
))
3310 printf_unfiltered ("Target does not support `%s' architecture.\n",
3311 arch
->printable_name
);
3314 target_architecture_auto
= 0;
3315 target_architecture
= arch
;
3320 /* Called if the user enters ``set architecture'' with or without an
3323 set_architecture (args
, from_tty
)
3329 printf_unfiltered ("\"set architecture\" must be followed by \"auto\" or an architecture name.\n");
3331 else if (strcmp (args
, "auto") == 0)
3333 target_architecture_auto
= 1;
3337 const bfd_arch_info_type
*arch
= bfd_scan_arch (args
);
3341 printf_unfiltered ("Architecture `%s' not reconized.\n", args
);
3345 /* Called if the user enters ``show architecture'' without an argument. */
3347 show_architecture (args
, from_tty
)
3352 arch
= target_architecture
->printable_name
;
3353 if (target_architecture_auto
)
3354 printf_filtered ("The target architecture is set automatically (currently %s)\n", arch
);
3356 printf_filtered ("The target architecture is assumed to be %s\n", arch
);
3359 /* Called if the user enters ``info architecture'' without an argument. */
3361 info_architecture (args
, from_tty
)
3365 enum bfd_architecture a
;
3366 printf_filtered ("Available architectures are:\n");
3367 for (a
= bfd_arch_obscure
+ 1; a
< bfd_arch_last
; a
++)
3369 const bfd_arch_info_type
*ap
= bfd_lookup_arch (a
, 0);
3374 printf_filtered (" %s", ap
->printable_name
);
3378 printf_filtered ("\n");
3383 /* Set the architecture from arch/machine */
3385 set_architecture_from_arch_mach (arch
, mach
)
3386 enum bfd_architecture arch
;
3389 const bfd_arch_info_type
*wanted
= bfd_lookup_arch (arch
, mach
);
3393 fatal ("hardwired architecture/machine not reconized");
3397 /* Set the architecture from a BFD */
3399 set_architecture_from_file (abfd
)
3402 const bfd_arch_info_type
*wanted
= bfd_get_arch_info (abfd
);
3403 if (target_architecture_auto
)
3405 if (target_architecture_hook
!= NULL
3406 && !target_architecture_hook (wanted
))
3407 warning ("Target may not support %s architecture",
3408 wanted
->printable_name
);
3409 target_architecture
= wanted
;
3411 else if (wanted
!= target_architecture
)
3413 warning ("%s architecture file may be incompatible with %s target.",
3414 wanted
->printable_name
,
3415 target_architecture
->printable_name
);
3419 /* Functions to manipulate command line editing control variables. */
3421 /* Number of commands to print in each call to show_commands. */
3422 #define Hist_print 10
3424 show_commands (args
, from_tty
)
3428 /* Index for history commands. Relative to history_base. */
3431 /* Number of the history entry which we are planning to display next.
3432 Relative to history_base. */
3435 /* The first command in the history which doesn't exist (i.e. one more
3436 than the number of the last command). Relative to history_base. */
3439 extern HIST_ENTRY
*history_get
PARAMS ((int));
3441 /* Print out some of the commands from the command history. */
3442 /* First determine the length of the history list. */
3443 hist_len
= history_size
;
3444 for (offset
= 0; offset
< history_size
; offset
++)
3446 if (!history_get (history_base
+ offset
))
3455 if (args
[0] == '+' && args
[1] == '\0')
3456 /* "info editing +" should print from the stored position. */
3459 /* "info editing <exp>" should print around command number <exp>. */
3460 num
= (parse_and_eval_address (args
) - history_base
) - Hist_print
/ 2;
3462 /* "show commands" means print the last Hist_print commands. */
3465 num
= hist_len
- Hist_print
;
3471 /* If there are at least Hist_print commands, we want to display the last
3472 Hist_print rather than, say, the last 6. */
3473 if (hist_len
- num
< Hist_print
)
3475 num
= hist_len
- Hist_print
;
3480 for (offset
= num
; offset
< num
+ Hist_print
&& offset
< hist_len
; offset
++)
3482 printf_filtered ("%5d %s\n", history_base
+ offset
,
3483 (history_get (history_base
+ offset
))->line
);
3486 /* The next command we want to display is the next one that we haven't
3490 /* If the user repeats this command with return, it should do what
3491 "show commands +" does. This is unnecessary if arg is null,
3492 because "show commands +" is not useful after "show commands". */
3493 if (from_tty
&& args
)
3500 /* Called by do_setshow_command. */
3503 set_history_size_command (args
, from_tty
, c
)
3506 struct cmd_list_element
*c
;
3508 if (history_size
== INT_MAX
)
3509 unstifle_history ();
3510 else if (history_size
>= 0)
3511 stifle_history (history_size
);
3514 history_size
= INT_MAX
;
3515 error ("History size must be non-negative");
3521 set_history (args
, from_tty
)
3525 printf_unfiltered ("\"set history\" must be followed by the name of a history subcommand.\n");
3526 help_list (sethistlist
, "set history ", -1, gdb_stdout
);
3531 show_history (args
, from_tty
)
3535 cmd_show_list (showhistlist
, from_tty
, "");
3538 int info_verbose
= 0; /* Default verbose msgs off */
3540 /* Called by do_setshow_command. An elaborate joke. */
3543 set_verbose (args
, from_tty
, c
)
3546 struct cmd_list_element
*c
;
3548 char *cmdname
= "verbose";
3549 struct cmd_list_element
*showcmd
;
3551 showcmd
= lookup_cmd_1 (&cmdname
, showlist
, NULL
, 1);
3555 c
->doc
= "Set verbose printing of informational messages.";
3556 showcmd
->doc
= "Show verbose printing of informational messages.";
3560 c
->doc
= "Set verbosity.";
3561 showcmd
->doc
= "Show verbosity.";
3566 float_handler (signo
)
3569 /* This message is based on ANSI C, section 4.7. Note that integer
3570 divide by zero causes this, so "float" is a misnomer. */
3571 signal (SIGFPE
, float_handler
);
3572 error ("Erroneous arithmetic operation.");
3584 enablebreaklist
= NULL
;
3590 showhistlist
= NULL
;
3591 unsethistlist
= NULL
;
3592 #if MAINTENANCE_CMDS
3593 maintenancelist
= NULL
;
3594 maintenanceinfolist
= NULL
;
3595 maintenanceprintlist
= NULL
;
3597 setprintlist
= NULL
;
3598 showprintlist
= NULL
;
3599 setchecklist
= NULL
;
3600 showchecklist
= NULL
;
3603 /* Init the history buffer. Note that we are called after the init file(s)
3604 * have been read so that the user can change the history file via his
3605 * .gdbinit file (for instance). The GDBHISTFILE environment variable
3606 * overrides all of this.
3614 tmpenv
= getenv ("HISTSIZE");
3616 history_size
= atoi (tmpenv
);
3617 else if (!history_size
)
3620 stifle_history (history_size
);
3622 tmpenv
= getenv ("GDBHISTFILE");
3624 history_filename
= savestring (tmpenv
, strlen(tmpenv
));
3625 else if (!history_filename
) {
3626 /* We include the current directory so that if the user changes
3627 directories the file written will be the same as the one
3629 history_filename
= concat (current_directory
, "/.gdb_history", NULL
);
3631 read_history (history_filename
);
3637 struct cmd_list_element
*c
;
3639 add_prefix_cmd ("endian", class_support
, set_endian
,
3640 "Set endianness of target.",
3641 &endianlist
, "set endian ", 0, &setlist
);
3642 add_cmd ("big", class_support
, set_endian_big
,
3643 "Set target as being big endian.", &endianlist
);
3644 add_cmd ("little", class_support
, set_endian_little
,
3645 "Set target as being little endian.", &endianlist
);
3646 add_cmd ("auto", class_support
, set_endian_auto
,
3647 "Select target endianness automatically.", &endianlist
);
3648 add_cmd ("endian", class_support
, show_endian
,
3649 "Show endianness of target.", &showlist
);
3651 add_cmd ("architecture", class_support
, set_architecture
,
3652 "Set architecture of target.", &setlist
);
3653 add_alias_cmd ("processor", "architecture", class_support
, 1, &setlist
);
3654 add_cmd ("architecture", class_support
, show_architecture
,
3655 "Show architecture of target.", &showlist
);
3656 add_cmd ("architecture", class_support
, info_architecture
,
3657 "List supported target architectures", &infolist
);
3660 #ifdef DEFAULT_PROMPT
3661 prompt
= savestring (DEFAULT_PROMPT
, strlen(DEFAULT_PROMPT
));
3663 prompt
= savestring ("(gdb) ", 6);
3666 /* Set the important stuff up for command editing. */
3667 command_editing_p
= 1;
3668 history_expansion_p
= 0;
3669 write_history_p
= 0;
3671 /* Setup important stuff for command line editing. */
3672 rl_completion_entry_function
= (int (*)()) readline_line_completion_function
;
3673 rl_completer_word_break_characters
= gdb_completer_word_break_characters
;
3674 rl_completer_quote_characters
= gdb_completer_quote_characters
;
3675 rl_readline_name
= "gdb";
3677 /* Define the classes of commands.
3678 They will appear in the help list in the reverse of this order. */
3680 add_cmd ("internals", class_maintenance
, NO_FUNCTION
,
3681 "Maintenance commands.\n\
3682 Some gdb commands are provided just for use by gdb maintainers.\n\
3683 These commands are subject to frequent change, and may not be as\n\
3684 well documented as user commands.",
3686 add_cmd ("obscure", class_obscure
, NO_FUNCTION
, "Obscure features.", &cmdlist
);
3687 add_cmd ("aliases", class_alias
, NO_FUNCTION
, "Aliases of other commands.", &cmdlist
);
3688 add_cmd ("user-defined", class_user
, NO_FUNCTION
, "User-defined commands.\n\
3689 The commands in this class are those defined by the user.\n\
3690 Use the \"define\" command to define a command.", &cmdlist
);
3691 add_cmd ("support", class_support
, NO_FUNCTION
, "Support facilities.", &cmdlist
);
3692 add_cmd ("status", class_info
, NO_FUNCTION
, "Status inquiries.", &cmdlist
);
3693 add_cmd ("files", class_files
, NO_FUNCTION
, "Specifying and examining files.", &cmdlist
);
3694 add_cmd ("breakpoints", class_breakpoint
, NO_FUNCTION
, "Making program stop at certain points.", &cmdlist
);
3695 add_cmd ("data", class_vars
, NO_FUNCTION
, "Examining data.", &cmdlist
);
3696 add_cmd ("stack", class_stack
, NO_FUNCTION
, "Examining the stack.\n\
3697 The stack is made up of stack frames. Gdb assigns numbers to stack frames\n\
3698 counting from zero for the innermost (currently executing) frame.\n\n\
3699 At any time gdb identifies one frame as the \"selected\" frame.\n\
3700 Variable lookups are done with respect to the selected frame.\n\
3701 When the program being debugged stops, gdb selects the innermost frame.\n\
3702 The commands below can be used to select other frames by number or address.",
3704 add_cmd ("running", class_run
, NO_FUNCTION
, "Running the program.", &cmdlist
);
3706 add_com ("pwd", class_files
, pwd_command
,
3707 "Print working directory. This is used for your program as well.");
3708 c
= add_cmd ("cd", class_files
, cd_command
,
3709 "Set working directory to DIR for debugger and program being debugged.\n\
3710 The change does not take effect for the program being debugged\n\
3711 until the next time it is started.", &cmdlist
);
3712 c
->completer
= filename_completer
;
3715 (add_set_cmd ("prompt", class_support
, var_string
, (char *)&prompt
,
3720 add_com ("echo", class_support
, echo_command
,
3721 "Print a constant string. Give string as argument.\n\
3722 C escape sequences may be used in the argument.\n\
3723 No newline is added at the end of the argument;\n\
3724 use \"\\n\" if you want a newline to be printed.\n\
3725 Since leading and trailing whitespace are ignored in command arguments,\n\
3726 if you want to print some you must use \"\\\" before leading whitespace\n\
3727 to be printed or after trailing whitespace.");
3728 add_com ("document", class_support
, document_command
,
3729 "Document a user-defined command.\n\
3730 Give command name as argument. Give documentation on following lines.\n\
3731 End with a line of just \"end\".");
3732 add_com ("define", class_support
, define_command
,
3733 "Define a new command name. Command name is argument.\n\
3734 Definition appears on following lines, one command per line.\n\
3735 End with a line of just \"end\".\n\
3736 Use the \"document\" command to give documentation for the new command.\n\
3737 Commands defined in this way may have up to ten arguments.");
3740 c
= add_cmd ("source", class_support
, source_command
,
3741 "Read commands from a file named FILE.\n\
3742 Note that the file \"" GDBINIT_FILENAME
"\" is read automatically in this way\n\
3743 when gdb is started.", &cmdlist
);
3745 /* Punt file name, we can't help it easily. */
3746 c
= add_cmd ("source", class_support
, source_command
,
3747 "Read commands from a file named FILE.\n\
3748 Note that the file \".gdbinit\" is read automatically in this way\n\
3749 when gdb is started.", &cmdlist
);
3751 c
->completer
= filename_completer
;
3753 add_com ("quit", class_support
, quit_command
, "Exit gdb.");
3754 add_com ("help", class_support
, help_command
, "Print list of commands.");
3755 add_com_alias ("q", "quit", class_support
, 1);
3756 add_com_alias ("h", "help", class_support
, 1);
3758 add_com ("dont-repeat", class_support
, dont_repeat_command
, "Don't repeat this command.\n\
3759 Primarily used inside of user-defined commands that should not be repeated when\n\
3762 c
= add_set_cmd ("verbose", class_support
, var_boolean
, (char *)&info_verbose
,
3765 add_show_from_set (c
, &showlist
);
3766 c
->function
.sfunc
= set_verbose
;
3767 set_verbose (NULL
, 0, c
);
3770 (add_set_cmd ("editing", class_support
, var_boolean
, (char *)&command_editing_p
,
3771 "Set editing of command lines as they are typed.\n\
3772 Use \"on\" to enable the editing, and \"off\" to disable it.\n\
3773 Without an argument, command line editing is enabled. To edit, use\n\
3774 EMACS-like or VI-like commands like control-P or ESC.", &setlist
),
3777 add_prefix_cmd ("history", class_support
, set_history
,
3778 "Generic command for setting command history parameters.",
3779 &sethistlist
, "set history ", 0, &setlist
);
3780 add_prefix_cmd ("history", class_support
, show_history
,
3781 "Generic command for showing command history parameters.",
3782 &showhistlist
, "show history ", 0, &showlist
);
3785 (add_set_cmd ("expansion", no_class
, var_boolean
, (char *)&history_expansion_p
,
3786 "Set history expansion on command input.\n\
3787 Without an argument, history expansion is enabled.", &sethistlist
),
3791 (add_set_cmd ("save", no_class
, var_boolean
, (char *)&write_history_p
,
3792 "Set saving of the history record on exit.\n\
3793 Use \"on\" to enable the saving, and \"off\" to disable it.\n\
3794 Without an argument, saving is enabled.", &sethistlist
),
3797 c
= add_set_cmd ("size", no_class
, var_integer
, (char *)&history_size
,
3798 "Set the size of the command history, \n\
3799 ie. the number of previous commands to keep a record of.", &sethistlist
);
3800 add_show_from_set (c
, &showhistlist
);
3801 c
->function
.sfunc
= set_history_size_command
;
3804 (add_set_cmd ("filename", no_class
, var_filename
, (char *)&history_filename
,
3805 "Set the filename in which to record the command history\n\
3806 (the list of previous commands of which a record is kept).", &sethistlist
),
3810 (add_set_cmd ("confirm", class_support
, var_boolean
,
3812 "Set whether to confirm potentially dangerous operations.",
3816 add_prefix_cmd ("info", class_info
, info_command
,
3817 "Generic command for showing things about the program being debugged.",
3818 &infolist
, "info ", 0, &cmdlist
);
3819 add_com_alias ("i", "info", class_info
, 1);
3821 add_com ("complete", class_obscure
, complete_command
,
3822 "List the completions for the rest of the line as a command.");
3824 add_prefix_cmd ("show", class_info
, show_command
,
3825 "Generic command for showing things about the debugger.",
3826 &showlist
, "show ", 0, &cmdlist
);
3827 /* Another way to get at the same thing. */
3828 add_info ("set", show_command
, "Show all GDB settings.");
3830 add_cmd ("commands", no_class
, show_commands
,
3831 "Show the history of commands you typed.\n\
3832 You can supply a command number to start with, or a `+' to start after\n\
3833 the previous command number shown.",
3836 add_cmd ("version", no_class
, show_version
,
3837 "Show what version of GDB this is.", &showlist
);
3839 add_com ("while", class_support
, while_command
,
3840 "Execute nested commands WHILE the conditional expression is non zero.\n\
3841 The conditional expression must follow the word `while' and must in turn be\n\
3842 followed by a new line. The nested commands must be entered one per line,\n\
3843 and should be terminated by the word `end'.");
3845 add_com ("if", class_support
, if_command
,
3846 "Execute nested commands once IF the conditional expression is non zero.\n\
3847 The conditional expression must follow the word `if' and must in turn be\n\
3848 followed by a new line. The nested commands must be entered one per line,\n\
3849 and should be terminated by the word 'else' or `end'. If an else clause\n\
3850 is used, the same rules apply to its nested commands as to the first ones.");
3852 /* If target is open when baud changes, it doesn't take effect until the
3853 next open (I think, not sure). */
3854 add_show_from_set (add_set_cmd ("remotebaud", no_class
,
3855 var_zinteger
, (char *)&baud_rate
,
3856 "Set baud rate for remote serial I/O.\n\
3857 This value is used to set the speed of the serial port when debugging\n\
3858 using remote targets.", &setlist
),
3862 add_set_cmd ("remotedebug", no_class
, var_zinteger
, (char *)&remote_debug
,
3863 "Set debugging of remote protocol.\n\
3864 When enabled, each packet sent or received with the remote target\n\
3865 is displayed.", &setlist
),
3869 add_set_cmd ("remotetimeout", no_class
, var_integer
, (char *)&remote_timeout
,
3870 "Set timeout limit to wait for target to respond.\n\
3871 This value is used to set the time limit for gdb to wait for a response\n\
3872 from he target.", &setlist
),
3875 c
= add_set_cmd ("annotate", class_obscure
, var_zinteger
,
3876 (char *)&annotation_level
, "Set annotation_level.\n\
3877 0 == normal; 1 == fullname (for use when running under emacs)\n\
3878 2 == output annotated suitably for use by programs that control GDB.",
3880 c
= add_show_from_set (c
, &showlist
);