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
,
463 /* Called when the current thread changes. Argument is thread id. */
465 void (*context_hook
) PARAMS ((int id
));
467 /* Takes control from error (). Typically used to prevent longjmps out of the
468 middle of the GUI. Usually used in conjunction with a catch routine. */
470 NORETURN
void (*error_hook
) PARAMS ((void)) ATTR_NORETURN
;
473 /* Where to go for return_to_top_level (RETURN_ERROR). */
474 SIGJMP_BUF error_return
;
475 /* Where to go for return_to_top_level (RETURN_QUIT). */
476 SIGJMP_BUF quit_return
;
478 /* Return for reason REASON. This generally gets back to the command
479 loop, but can be caught via catch_errors. */
482 return_to_top_level (reason
)
483 enum return_reason reason
;
488 /* Perhaps it would be cleaner to do this via the cleanup chain (not sure
489 I can think of a reason why that is vital, though). */
490 bpstat_clear_actions(stop_bpstat
); /* Clear queued breakpoint commands */
492 disable_current_display ();
493 do_cleanups (ALL_CLEANUPS
);
495 if (annotation_level
> 1)
506 (NORETURN
void) SIGLONGJMP
507 (reason
== RETURN_ERROR
? error_return
: quit_return
, 1);
510 /* Call FUNC with arg ARGS, catching any errors. If there is no
511 error, return the value returned by FUNC. If there is an error,
512 print ERRSTRING, print the specific error message, then return
515 Must not be called with immediate_quit in effect (bad things might
516 happen, say we got a signal in the middle of a memcpy to quit_return).
517 This is an OK restriction; with very few exceptions immediate_quit can
518 be replaced by judicious use of QUIT.
520 MASK specifies what to catch; it is normally set to
521 RETURN_MASK_ALL, if for no other reason than that the code which
522 calls catch_errors might not be set up to deal with a quit which
523 isn't caught. But if the code can deal with it, it generally
524 should be RETURN_MASK_ERROR, unless for some reason it is more
525 useful to abort only the portion of the operation inside the
526 catch_errors. Note that quit should return to the command line
527 fairly quickly, even if some further processing is being done. */
530 catch_errors (func
, args
, errstring
, mask
)
531 int (*func
) PARAMS ((char *));
536 SIGJMP_BUF saved_error
;
537 SIGJMP_BUF saved_quit
;
540 struct cleanup
*saved_cleanup_chain
;
541 char *saved_error_pre_print
;
542 char *saved_quit_pre_print
;
544 saved_cleanup_chain
= save_cleanups ();
545 saved_error_pre_print
= error_pre_print
;
546 saved_quit_pre_print
= quit_pre_print
;
548 if (mask
& RETURN_MASK_ERROR
)
550 memcpy ((char *)saved_error
, (char *)error_return
, sizeof (SIGJMP_BUF
));
551 error_pre_print
= errstring
;
553 if (mask
& RETURN_MASK_QUIT
)
555 memcpy (saved_quit
, quit_return
, sizeof (SIGJMP_BUF
));
556 quit_pre_print
= errstring
;
559 if (SIGSETJMP (tmp_jmp
) == 0)
561 if (mask
& RETURN_MASK_ERROR
)
562 memcpy (error_return
, tmp_jmp
, sizeof (SIGJMP_BUF
));
563 if (mask
& RETURN_MASK_QUIT
)
564 memcpy (quit_return
, tmp_jmp
, sizeof (SIGJMP_BUF
));
565 val
= (*func
) (args
);
570 restore_cleanups (saved_cleanup_chain
);
572 if (mask
& RETURN_MASK_ERROR
)
574 memcpy (error_return
, saved_error
, sizeof (SIGJMP_BUF
));
575 error_pre_print
= saved_error_pre_print
;
577 if (mask
& RETURN_MASK_QUIT
)
579 memcpy (quit_return
, saved_quit
, sizeof (SIGJMP_BUF
));
580 quit_pre_print
= saved_quit_pre_print
;
585 /* Handler for SIGHUP. */
592 catch_errors (quit_cover
, NULL
,
593 "Could not kill the program being debugged", RETURN_MASK_ALL
);
594 signal (SIGHUP
, SIG_DFL
);
595 kill (getpid (), SIGHUP
);
598 /* Just a little helper function for disconnect(). */
604 caution
= 0; /* Throw caution to the wind -- we're exiting.
605 This prevents asking the user dumb questions. */
606 quit_command((char *)0, 0);
609 #endif /* defined SIGHUP */
611 /* Line number we are currently in in a file which is being sourced. */
612 static int source_line_number
;
614 /* Name of the file we are sourcing. */
615 static char *source_file_name
;
617 /* Buffer containing the error_pre_print used by the source stuff.
619 static char *source_error
;
620 static int source_error_allocated
;
622 /* Something to glom on to the start of error_pre_print if source_file_name
624 static char *source_pre_error
;
626 /* Clean up on error during a "source" command (or execution of a
627 user-defined command). */
630 source_cleanup (stream
)
633 /* Restore the previous input stream. */
637 /* Read commands from STREAM. */
639 read_command_file (stream
)
642 struct cleanup
*cleanups
;
644 cleanups
= make_cleanup ((make_cleanup_func
) source_cleanup
, instream
);
647 do_cleanups (cleanups
);
650 extern void init_proc
PARAMS ((void));
652 void (*pre_init_ui_hook
) PARAMS ((void));
658 if (pre_init_ui_hook
)
661 /* Run the init function of each source file */
663 getcwd (gdb_dirbuf
, sizeof (gdb_dirbuf
));
664 current_directory
= gdb_dirbuf
;
666 init_cmd_lists (); /* This needs to be done first */
667 initialize_targets (); /* Setup target_terminal macros for utils.c */
668 initialize_utils (); /* Make errors and warnings possible */
669 initialize_all_files ();
670 init_main (); /* But that omits this file! Do it now */
675 /* We need a default language for parsing expressions, so simple things like
676 "set width 0" won't fail if no language is explicitly set in a config file
677 or implicitly set by reading an executable during startup. */
678 set_language (language_c
);
679 expected_language
= current_language
; /* don't warn about the change. */
682 init_ui_hook (argv0
);
685 /* Allocate, initialize a new command line structure for one of the
686 control commands (if/while). */
688 static struct command_line
*
689 build_command_line (type
, args
)
690 enum command_control_type type
;
693 struct command_line
*cmd
;
696 error ("if/while commands require arguments.\n");
698 cmd
= (struct command_line
*)xmalloc (sizeof (struct command_line
));
700 cmd
->control_type
= type
;
704 = (struct command_line
**)xmalloc (sizeof (struct command_line
*)
706 memset (cmd
->body_list
, 0, sizeof (struct command_line
*) * cmd
->body_count
);
707 cmd
->line
= savestring (args
, strlen (args
));
711 /* Build and return a new command structure for the control commands
712 such as "if" and "while". */
714 static struct command_line
*
715 get_command_line (type
, arg
)
716 enum command_control_type type
;
719 struct command_line
*cmd
;
720 struct cleanup
*old_chain
= NULL
;
722 /* Allocate and build a new command line structure. */
723 cmd
= build_command_line (type
, arg
);
725 old_chain
= make_cleanup ((make_cleanup_func
) free_command_lines
, &cmd
);
727 /* Read in the body of this command. */
728 if (recurse_read_control_structure (cmd
) == invalid_control
)
730 warning ("error reading in control structure\n");
731 do_cleanups (old_chain
);
735 discard_cleanups (old_chain
);
739 /* Recursively print a command (including full control structures). */
741 print_command_line (cmd
, depth
)
742 struct command_line
*cmd
;
749 for (i
= 0; i
< depth
; i
++)
750 fputs_filtered (" ", gdb_stdout
);
753 /* A simple command, print it and return. */
754 if (cmd
->control_type
== simple_control
)
756 fputs_filtered (cmd
->line
, gdb_stdout
);
757 fputs_filtered ("\n", gdb_stdout
);
761 /* loop_continue to jump to the start of a while loop, print it
763 if (cmd
->control_type
== continue_control
)
765 fputs_filtered ("loop_continue\n", gdb_stdout
);
769 /* loop_break to break out of a while loop, print it and return. */
770 if (cmd
->control_type
== break_control
)
772 fputs_filtered ("loop_break\n", gdb_stdout
);
776 /* A while command. Recursively print its subcommands before returning. */
777 if (cmd
->control_type
== while_control
)
779 struct command_line
*list
;
780 fputs_filtered ("while ", gdb_stdout
);
781 fputs_filtered (cmd
->line
, gdb_stdout
);
782 fputs_filtered ("\n", gdb_stdout
);
783 list
= *cmd
->body_list
;
786 print_command_line (list
, depth
+ 1);
791 /* An if command. Recursively print both arms before returning. */
792 if (cmd
->control_type
== if_control
)
794 fputs_filtered ("if ", gdb_stdout
);
795 fputs_filtered (cmd
->line
, gdb_stdout
);
796 fputs_filtered ("\n", gdb_stdout
);
798 print_command_line (cmd
->body_list
[0], depth
+ 1);
800 /* Show the false arm if it exists. */
801 if (cmd
->body_count
== 2)
805 for (i
= 0; i
< depth
; i
++)
806 fputs_filtered (" ", gdb_stdout
);
808 fputs_filtered ("else\n", gdb_stdout
);
809 print_command_line (cmd
->body_list
[1], depth
+ 1);
813 for (i
= 0; i
< depth
; i
++)
814 fputs_filtered (" ", gdb_stdout
);
816 fputs_filtered ("end\n", gdb_stdout
);
820 /* Execute the command in CMD. */
822 enum command_control_type
823 execute_control_command (cmd
)
824 struct command_line
*cmd
;
826 struct expression
*expr
;
827 struct command_line
*current
;
828 struct cleanup
*old_chain
= 0;
832 enum command_control_type ret
;
835 switch (cmd
->control_type
)
838 /* A simple command, execute it and return. */
839 new_line
= insert_args (cmd
->line
);
841 return invalid_control
;
842 old_chain
= make_cleanup ((make_cleanup_func
) free_current_contents
,
844 execute_command (new_line
, 0);
845 ret
= cmd
->control_type
;
848 case continue_control
:
850 /* Return for "continue", and "break" so we can either
851 continue the loop at the top, or break out. */
852 ret
= cmd
->control_type
;
857 /* Parse the loop control expression for the while statement. */
858 new_line
= insert_args (cmd
->line
);
860 return invalid_control
;
861 old_chain
= make_cleanup ((make_cleanup_func
) free_current_contents
,
863 expr
= parse_expression (new_line
);
864 make_cleanup ((make_cleanup_func
) free_current_contents
, &expr
);
866 ret
= simple_control
;
869 /* Keep iterating so long as the expression is true. */
876 /* Evaluate the expression. */
877 val_mark
= value_mark ();
878 val
= evaluate_expression (expr
);
879 cond_result
= value_true (val
);
880 value_free_to_mark (val_mark
);
882 /* If the value is false, then break out of the loop. */
886 /* Execute the body of the while statement. */
887 current
= *cmd
->body_list
;
890 ret
= execute_control_command (current
);
892 /* If we got an error, or a "break" command, then stop
894 if (ret
== invalid_control
|| ret
== break_control
)
900 /* If we got a "continue" command, then restart the loop
902 if (ret
== continue_control
)
905 /* Get the next statement. */
906 current
= current
->next
;
910 /* Reset RET so that we don't recurse the break all the way down. */
911 if (ret
== break_control
)
912 ret
= simple_control
;
919 new_line
= insert_args (cmd
->line
);
921 return invalid_control
;
922 old_chain
= make_cleanup ((make_cleanup_func
) free_current_contents
,
924 /* Parse the conditional for the if statement. */
925 expr
= parse_expression (new_line
);
926 make_cleanup ((make_cleanup_func
) free_current_contents
, &expr
);
929 ret
= simple_control
;
931 /* Evaluate the conditional. */
932 val_mark
= value_mark ();
933 val
= evaluate_expression (expr
);
935 /* Choose which arm to take commands from based on the value of the
936 conditional expression. */
937 if (value_true (val
))
938 current
= *cmd
->body_list
;
939 else if (cmd
->body_count
== 2)
940 current
= *(cmd
->body_list
+ 1);
941 value_free_to_mark (val_mark
);
943 /* Execute commands in the given arm. */
946 ret
= execute_control_command (current
);
948 /* If we got an error, get out. */
949 if (ret
!= simple_control
)
952 /* Get the next statement in the body. */
953 current
= current
->next
;
960 warning ("Invalid control type in command structure.");
961 return invalid_control
;
965 do_cleanups (old_chain
);
970 /* "while" command support. Executes a body of statements while the
971 loop condition is nonzero. */
974 while_command (arg
, from_tty
)
978 struct command_line
*command
= NULL
;
981 command
= get_command_line (while_control
, arg
);
986 execute_control_command (command
);
987 free_command_lines (&command
);
990 /* "if" command support. Execute either the true or false arm depending
991 on the value of the if conditional. */
994 if_command (arg
, from_tty
)
998 struct command_line
*command
= NULL
;
1001 command
= get_command_line (if_control
, arg
);
1003 if (command
== NULL
)
1006 execute_control_command (command
);
1007 free_command_lines (&command
);
1014 struct user_args
*oargs
= user_args
;
1016 fatal ("Internal error, arg_cleanup called with no user args.\n");
1018 user_args
= user_args
->next
;
1022 /* Bind the incomming arguments for a user defined command to
1023 $arg0, $arg1 ... $argMAXUSERARGS. */
1025 static struct cleanup
*
1029 struct user_args
*args
;
1030 struct cleanup
*old_chain
;
1031 unsigned int arg_count
= 0;
1033 args
= (struct user_args
*)xmalloc (sizeof (struct user_args
));
1034 memset (args
, 0, sizeof (struct user_args
));
1036 args
->next
= user_args
;
1039 old_chain
= make_cleanup ((make_cleanup_func
) arg_cleanup
, 0);
1051 if (arg_count
>= MAXUSERARGS
)
1053 error ("user defined function may only have %d arguments.\n",
1058 /* Strip whitespace. */
1059 while (*p
== ' ' || *p
== '\t')
1062 /* P now points to an argument. */
1064 user_args
->a
[arg_count
].arg
= p
;
1066 /* Get to the end of this argument. */
1069 if (((*p
== ' ' || *p
== '\t')) && !squote
&& !dquote
&& !bsquote
)
1075 else if (*p
== '\\')
1098 user_args
->a
[arg_count
].len
= p
- start_arg
;
1105 /* Given character string P, return a point to the first argument ($arg),
1106 or NULL if P contains no arguments. */
1112 while ((p
= strchr (p
, '$')))
1114 if (strncmp (p
, "$arg", 4) == 0 && isdigit (p
[4]))
1121 /* Insert the user defined arguments stored in user_arg into the $arg
1122 arguments found in line, with the updated copy being placed into nline. */
1128 char *p
, *save_line
, *new_line
;
1131 /* First we need to know how much memory to allocate for the new line. */
1134 while ((p
= locate_arg (line
)))
1139 if (i
>= user_args
->count
)
1141 error ("Missing argument %d in user function.\n", i
);
1144 len
+= user_args
->a
[i
].len
;
1148 /* Don't forget the tail. */
1149 len
+= strlen (line
);
1151 /* Allocate space for the new line and fill it in. */
1152 new_line
= (char *)xmalloc (len
+ 1);
1153 if (new_line
== NULL
)
1156 /* Restore pointer to beginning of old line. */
1159 /* Save pointer to beginning of new line. */
1160 save_line
= new_line
;
1162 while ((p
= locate_arg (line
)))
1166 memcpy (new_line
, line
, p
- line
);
1167 new_line
+= p
- line
;
1170 len
= user_args
->a
[i
].len
;
1173 memcpy (new_line
, user_args
->a
[i
].arg
, len
);
1178 /* Don't forget the tail. */
1179 strcpy (new_line
, line
);
1181 /* Return a pointer to the beginning of the new line. */
1186 execute_user_command (c
, args
)
1187 struct cmd_list_element
*c
;
1190 register struct command_line
*cmdlines
;
1191 struct cleanup
*old_chain
;
1192 enum command_control_type ret
;
1194 old_chain
= setup_user_args (args
);
1196 cmdlines
= c
->user_commands
;
1201 /* Set the instream to 0, indicating execution of a
1202 user-defined function. */
1203 old_chain
= make_cleanup ((make_cleanup_func
) source_cleanup
, instream
);
1204 instream
= (FILE *) 0;
1207 ret
= execute_control_command (cmdlines
);
1208 if (ret
!= simple_control
&& ret
!= break_control
)
1210 warning ("Error in control structure.\n");
1213 cmdlines
= cmdlines
->next
;
1215 do_cleanups (old_chain
);
1218 /* Execute the line P as a command.
1219 Pass FROM_TTY as second argument to the defining function. */
1222 execute_command (p
, from_tty
)
1226 register struct cmd_list_element
*c
;
1227 register enum language flang
;
1228 static int warned
= 0;
1229 /* FIXME: These should really be in an appropriate header file */
1230 extern void serial_log_command
PARAMS ((const char *));
1234 /* Force cleanup of any alloca areas if using C alloca instead of
1235 a builtin alloca. */
1238 /* This can happen when command_line_input hits end of file. */
1242 serial_log_command (p
);
1244 while (*p
== ' ' || *p
== '\t') p
++;
1249 c
= lookup_cmd (&p
, cmdlist
, "", 0, 1);
1250 /* Pass null arg rather than an empty one. */
1253 /* Clear off trailing whitespace, except for set and complete command. */
1254 if (arg
&& c
->type
!= set_cmd
&& c
->function
.cfunc
!= complete_command
)
1256 p
= arg
+ strlen (arg
) - 1;
1257 while (p
>= arg
&& (*p
== ' ' || *p
== '\t'))
1262 /* If this command has been hooked, run the hook first. */
1264 execute_user_command (c
->hook
, (char *)0);
1266 if (c
->class == class_user
)
1267 execute_user_command (c
, arg
);
1268 else if (c
->type
== set_cmd
|| c
->type
== show_cmd
)
1269 do_setshow_command (arg
, from_tty
& caution
, c
);
1270 else if (c
->function
.cfunc
== NO_FUNCTION
)
1271 error ("That is not a command, just a help topic.");
1272 else if (call_command_hook
)
1273 call_command_hook (c
, arg
, from_tty
& caution
);
1275 (*c
->function
.cfunc
) (arg
, from_tty
& caution
);
1278 /* Tell the user if the language has changed (except first time). */
1279 if (current_language
!= expected_language
)
1281 if (language_mode
== language_mode_auto
) {
1282 language_info (1); /* Print what changed. */
1287 /* Warn the user if the working language does not match the
1288 language of the current frame. Only warn the user if we are
1289 actually running the program, i.e. there is a stack. */
1290 /* FIXME: This should be cacheing the frame and only running when
1291 the frame changes. */
1293 if (target_has_stack
)
1295 flang
= get_frame_language ();
1297 && flang
!= language_unknown
1298 && flang
!= current_language
->la_language
)
1300 printf_filtered ("%s\n", lang_frame_mismatch_warn
);
1308 command_loop_marker (foo
)
1313 /* Read commands from `instream' and execute them
1314 until end of file or error reading instream. */
1319 struct cleanup
*old_chain
;
1321 int stdin_is_tty
= ISATTY (stdin
);
1322 long time_at_cmd_start
;
1324 long space_at_cmd_start
;
1326 extern int display_time
;
1327 extern int display_space
;
1329 while (instream
&& !feof (instream
))
1331 if (window_hook
&& instream
== stdin
)
1332 (*window_hook
) (instream
, prompt
);
1335 if (instream
== stdin
&& stdin_is_tty
)
1336 reinitialize_more_filter ();
1337 old_chain
= make_cleanup ((make_cleanup_func
) command_loop_marker
, 0);
1338 command
= command_line_input (instream
== stdin
? prompt
: (char *) NULL
,
1339 instream
== stdin
, "prompt");
1343 time_at_cmd_start
= get_run_time ();
1348 extern char **environ
;
1349 char *lim
= (char *) sbrk (0);
1351 space_at_cmd_start
= (long) (lim
- (char *) &environ
);
1355 execute_command (command
, instream
== stdin
);
1356 /* Do any commands attached to breakpoint we stopped at. */
1357 bpstat_do_actions (&stop_bpstat
);
1358 do_cleanups (old_chain
);
1362 long cmd_time
= get_run_time () - time_at_cmd_start
;
1364 printf_unfiltered ("Command execution time: %ld.%06ld\n",
1365 cmd_time
/ 1000000, cmd_time
% 1000000);
1371 extern char **environ
;
1372 char *lim
= (char *) sbrk (0);
1373 long space_now
= lim
- (char *) &environ
;
1374 long space_diff
= space_now
- space_at_cmd_start
;
1376 printf_unfiltered ("Space used: %ld (%c%ld for this command)\n",
1378 (space_diff
>= 0 ? '+' : '-'),
1385 /* Commands call this if they do not want to be repeated by null lines. */
1393 /* If we aren't reading from standard input, we are saving the last
1394 thing read from stdin in line and don't want to delete it. Null lines
1395 won't repeat here in any case. */
1396 if (instream
== stdin
)
1400 /* Read a line from the stream "instream" without command line editing.
1402 It prints PRROMPT once at the start.
1403 Action is compatible with "readline", e.g. space for the result is
1404 malloc'd and should be freed by the caller.
1406 A NULL return means end of file. */
1408 gdb_readline (prrompt
)
1413 int input_index
= 0;
1414 int result_size
= 80;
1418 /* Don't use a _filtered function here. It causes the assumed
1419 character position to be off, since the newline we read from
1420 the user is not accounted for. */
1421 fputs_unfiltered (prrompt
, gdb_stdout
);
1423 /* Move to a new line so the entered line doesn't have a prompt
1424 on the front of it. */
1425 fputs_unfiltered ("\n", gdb_stdout
);
1427 gdb_flush (gdb_stdout
);
1430 result
= (char *) xmalloc (result_size
);
1434 /* Read from stdin if we are executing a user defined command.
1435 This is the right thing for prompt_for_continue, at least. */
1436 c
= fgetc (instream
? instream
: stdin
);
1440 if (input_index
> 0)
1441 /* The last line does not end with a newline. Return it, and
1442 if we are called again fgetc will still return EOF and
1443 we'll return NULL then. */
1452 result
[input_index
++] = c
;
1453 while (input_index
>= result_size
)
1456 result
= (char *) xrealloc (result
, result_size
);
1460 result
[input_index
++] = '\0';
1464 /* Variables which control command line editing and history
1465 substitution. These variables are given default values at the end
1467 static int command_editing_p
;
1468 static int history_expansion_p
;
1469 static int write_history_p
;
1470 static int history_size
;
1471 static char *history_filename
;
1473 /* readline uses the word breaks for two things:
1474 (1) In figuring out where to point the TEXT parameter to the
1475 rl_completion_entry_function. Since we don't use TEXT for much,
1476 it doesn't matter a lot what the word breaks are for this purpose, but
1477 it does affect how much stuff M-? lists.
1478 (2) If one of the matches contains a word break character, readline
1479 will quote it. That's why we switch between
1480 gdb_completer_word_break_characters and
1481 gdb_completer_command_word_break_characters. I'm not sure when
1482 we need this behavior (perhaps for funky characters in C++ symbols?). */
1484 /* Variables which are necessary for fancy command line editing. */
1485 char *gdb_completer_word_break_characters
=
1486 " \t\n!@#$%^&*()+=|~`}{[]\"';:?/>.<,-";
1488 /* When completing on command names, we remove '-' from the list of
1489 word break characters, since we use it in command names. If the
1490 readline library sees one in any of the current completion strings,
1491 it thinks that the string needs to be quoted and automatically supplies
1493 char *gdb_completer_command_word_break_characters
=
1494 " \t\n!@#$%^&*()+=|~`}{[]\"';:?/>.<,";
1496 /* Characters that can be used to quote completion strings. Note that we
1497 can't include '"' because the gdb C parser treats such quoted sequences
1499 char *gdb_completer_quote_characters
=
1502 /* Functions that are used as part of the fancy command line editing. */
1504 /* This can be used for functions which don't want to complete on symbols
1505 but don't want to complete on anything else either. */
1508 noop_completer (text
, prefix
)
1515 /* Complete on filenames. */
1517 filename_completer (text
, word
)
1521 /* From readline. */
1522 extern char *filename_completion_function
PARAMS ((char *, int));
1523 int subsequent_name
;
1525 int return_val_used
;
1526 int return_val_alloced
;
1528 return_val_used
= 0;
1529 /* Small for testing. */
1530 return_val_alloced
= 1;
1531 return_val
= (char **) xmalloc (return_val_alloced
* sizeof (char *));
1533 subsequent_name
= 0;
1537 p
= filename_completion_function (text
, subsequent_name
);
1538 if (return_val_used
>= return_val_alloced
)
1540 return_val_alloced
*= 2;
1542 (char **) xrealloc (return_val
,
1543 return_val_alloced
* sizeof (char *));
1547 return_val
[return_val_used
++] = p
;
1550 /* Like emacs, don't complete on old versions. Especially useful
1551 in the "source" command. */
1552 if (p
[strlen (p
) - 1] == '~')
1558 /* Return exactly p. */
1559 return_val
[return_val_used
++] = p
;
1560 else if (word
> text
)
1562 /* Return some portion of p. */
1563 q
= xmalloc (strlen (p
) + 5);
1564 strcpy (q
, p
+ (word
- text
));
1565 return_val
[return_val_used
++] = q
;
1570 /* Return some of TEXT plus p. */
1571 q
= xmalloc (strlen (p
) + (text
- word
) + 5);
1572 strncpy (q
, word
, text
- word
);
1573 q
[text
- word
] = '\0';
1575 return_val
[return_val_used
++] = q
;
1579 subsequent_name
= 1;
1582 /* There is no way to do this just long enough to affect quote inserting
1583 without also affecting the next completion. This should be fixed in
1585 /* Insure that readline does the right thing
1586 with respect to inserting quotes. */
1587 rl_completer_word_break_characters
= "";
1592 /* Here are some useful test cases for completion. FIXME: These should
1593 be put in the test suite. They should be tested with both M-? and TAB.
1595 "show output-" "radix"
1596 "show output" "-radix"
1597 "p" ambiguous (commands starting with p--path, print, printf, etc.)
1598 "p " ambiguous (all symbols)
1599 "info t foo" no completions
1600 "info t " no completions
1601 "info t" ambiguous ("info target", "info terminal", etc.)
1602 "info ajksdlfk" no completions
1603 "info ajksdlfk " no completions
1605 "info " ambiguous (all info commands)
1606 "p \"a" no completions (string constant)
1607 "p 'a" ambiguous (all symbols starting with a)
1608 "p b-a" ambiguous (all symbols starting with a)
1609 "p b-" ambiguous (all symbols)
1610 "file Make" "file" (word break hard to screw up here)
1611 "file ../gdb.stabs/we" "ird" (needs to not break word at slash)
1614 /* Generate completions one by one for the completer. Each time we are
1615 called return another potential completion to the caller.
1616 line_completion just completes on commands or passes the buck to the
1617 command's completer function, the stuff specific to symbol completion
1618 is in make_symbol_completion_list.
1620 TEXT is the caller's idea of the "word" we are looking at.
1622 MATCHES is the number of matches that have currently been collected from
1623 calling this completion function. When zero, then we need to initialize,
1624 otherwise the initialization has already taken place and we can just
1625 return the next potential completion string.
1627 LINE_BUFFER is available to be looked at; it contains the entire text
1628 of the line. POINT is the offset in that line of the cursor. You
1629 should pretend that the line ends at POINT.
1631 Returns NULL if there are no more completions, else a pointer to a string
1632 which is a possible completion, it is the caller's responsibility to
1636 line_completion_function (text
, matches
, line_buffer
, point
)
1642 static char **list
= (char **)NULL
; /* Cache of completions */
1643 static int index
; /* Next cached completion */
1644 char *output
= NULL
;
1645 char *tmp_command
, *p
;
1646 /* Pointer within tmp_command which corresponds to text. */
1648 struct cmd_list_element
*c
, *result_list
;
1652 /* The caller is beginning to accumulate a new set of completions, so
1653 we need to find all of them now, and cache them for returning one at
1654 a time on future calls. */
1658 /* Free the storage used by LIST, but not by the strings inside.
1659 This is because rl_complete_internal () frees the strings. */
1665 /* Choose the default set of word break characters to break completions.
1666 If we later find out that we are doing completions on command strings
1667 (as opposed to strings supplied by the individual command completer
1668 functions, which can be any string) then we will switch to the
1669 special word break set for command strings, which leaves out the
1670 '-' character used in some commands. */
1672 rl_completer_word_break_characters
=
1673 gdb_completer_word_break_characters
;
1675 /* Decide whether to complete on a list of gdb commands or on symbols. */
1676 tmp_command
= (char *) alloca (point
+ 1);
1679 strncpy (tmp_command
, line_buffer
, point
);
1680 tmp_command
[point
] = '\0';
1681 /* Since text always contains some number of characters leading up
1682 to point, we can find the equivalent position in tmp_command
1683 by subtracting that many characters from the end of tmp_command. */
1684 word
= tmp_command
+ point
- strlen (text
);
1688 /* An empty line we want to consider ambiguous; that is, it
1689 could be any command. */
1690 c
= (struct cmd_list_element
*) -1;
1695 c
= lookup_cmd_1 (&p
, cmdlist
, &result_list
, 1);
1698 /* Move p up to the next interesting thing. */
1699 while (*p
== ' ' || *p
== '\t')
1706 /* It is an unrecognized command. So there are no
1707 possible completions. */
1710 else if (c
== (struct cmd_list_element
*) -1)
1714 /* lookup_cmd_1 advances p up to the first ambiguous thing, but
1715 doesn't advance over that thing itself. Do so now. */
1717 while (*q
&& (isalnum (*q
) || *q
== '-' || *q
== '_'))
1719 if (q
!= tmp_command
+ point
)
1721 /* There is something beyond the ambiguous
1722 command, so there are no possible completions. For
1723 example, "info t " or "info t foo" does not complete
1724 to anything, because "info t" can be "info target" or
1730 /* We're trying to complete on the command which was ambiguous.
1731 This we can deal with. */
1734 list
= complete_on_cmdlist (*result_list
->prefixlist
, p
,
1739 list
= complete_on_cmdlist (cmdlist
, p
, word
);
1741 /* Insure that readline does the right thing with respect to
1742 inserting quotes. */
1743 rl_completer_word_break_characters
=
1744 gdb_completer_command_word_break_characters
;
1749 /* We've recognized a full command. */
1751 if (p
== tmp_command
+ point
)
1753 /* There is no non-whitespace in the line beyond the command. */
1755 if (p
[-1] == ' ' || p
[-1] == '\t')
1757 /* The command is followed by whitespace; we need to complete
1758 on whatever comes after command. */
1761 /* It is a prefix command; what comes after it is
1762 a subcommand (e.g. "info "). */
1763 list
= complete_on_cmdlist (*c
->prefixlist
, p
, word
);
1765 /* Insure that readline does the right thing
1766 with respect to inserting quotes. */
1767 rl_completer_word_break_characters
=
1768 gdb_completer_command_word_break_characters
;
1772 list
= complete_on_enum (c
->enums
, p
, word
);
1773 rl_completer_word_break_characters
=
1774 gdb_completer_command_word_break_characters
;
1778 /* It is a normal command; what comes after it is
1779 completed by the command's completer function. */
1780 list
= (*c
->completer
) (p
, word
);
1785 /* The command is not followed by whitespace; we need to
1786 complete on the command itself. e.g. "p" which is a
1787 command itself but also can complete to "print", "ptype"
1791 /* Find the command we are completing on. */
1793 while (q
> tmp_command
)
1795 if (isalnum (q
[-1]) || q
[-1] == '-' || q
[-1] == '_')
1801 list
= complete_on_cmdlist (result_list
, q
, word
);
1803 /* Insure that readline does the right thing
1804 with respect to inserting quotes. */
1805 rl_completer_word_break_characters
=
1806 gdb_completer_command_word_break_characters
;
1811 /* There is non-whitespace beyond the command. */
1813 if (c
->prefixlist
&& !c
->allow_unknown
)
1815 /* It is an unrecognized subcommand of a prefix command,
1816 e.g. "info adsfkdj". */
1821 list
= complete_on_enum (c
->enums
, p
, word
);
1825 /* It is a normal command. */
1826 list
= (*c
->completer
) (p
, word
);
1832 /* If we found a list of potential completions during initialization then
1833 dole them out one at a time. The vector of completions is NULL
1834 terminated, so after returning the last one, return NULL (and continue
1835 to do so) each time we are called after that, until a new list is
1840 output
= list
[index
];
1848 /* Can't do this because readline hasn't yet checked the word breaks
1849 for figuring out whether to insert a quote. */
1851 /* Make sure the word break characters are set back to normal for the
1852 next time that readline tries to complete something. */
1853 rl_completer_word_break_characters
=
1854 gdb_completer_word_break_characters
;
1860 /* Line completion interface function for readline. */
1863 readline_line_completion_function (text
, matches
)
1867 return line_completion_function (text
, matches
, rl_line_buffer
, rl_point
);
1870 /* Skip over a possibly quoted word (as defined by the quote characters
1871 and word break characters the completer uses). Returns pointer to the
1872 location after the "word". */
1878 char quote_char
= '\0';
1881 for (scan
= str
; *scan
!= '\0'; scan
++)
1883 if (quote_char
!= '\0')
1885 /* Ignore everything until the matching close quote char */
1886 if (*scan
== quote_char
)
1888 /* Found matching close quote. */
1893 else if (strchr (gdb_completer_quote_characters
, *scan
))
1895 /* Found start of a quoted string. */
1898 else if (strchr (gdb_completer_word_break_characters
, *scan
))
1912 #if STOP_SIGNAL == SIGTSTP
1913 signal (SIGTSTP
, SIG_DFL
);
1915 kill (getpid (), SIGTSTP
);
1916 signal (SIGTSTP
, stop_sig
);
1918 signal (STOP_SIGNAL
, stop_sig
);
1920 printf_unfiltered ("%s", prompt
);
1921 gdb_flush (gdb_stdout
);
1923 /* Forget about any previous command -- null line now will do nothing. */
1926 #endif /* STOP_SIGNAL */
1928 /* Initialize signal handlers. */
1933 /* Under System V the default disposition of a signal is reinstated after
1934 the signal is caught and delivered to an application process. On such
1935 systems one must restore the replacement signal handler if one wishes
1936 to continue handling the signal in one's program. On BSD systems this
1937 is not needed but it is harmless, and it simplifies the code to just do
1938 it unconditionally. */
1939 signal (signo
, do_nothing
);
1945 signal (SIGINT
, request_quit
);
1947 /* If SIGTRAP was set to SIG_IGN, then the SIG_IGN will get passed
1948 to the inferior and breakpoints will be ignored. */
1950 signal (SIGTRAP
, SIG_DFL
);
1953 /* If we initialize SIGQUIT to SIG_IGN, then the SIG_IGN will get
1954 passed to the inferior, which we don't want. It would be
1955 possible to do a "signal (SIGQUIT, SIG_DFL)" after we fork, but
1956 on BSD4.3 systems using vfork, that can affect the
1957 GDB process as well as the inferior (the signal handling tables
1958 might be in memory, shared between the two). Since we establish
1959 a handler for SIGQUIT, when we call exec it will set the signal
1960 to SIG_DFL for us. */
1961 signal (SIGQUIT
, do_nothing
);
1963 if (signal (SIGHUP
, do_nothing
) != SIG_IGN
)
1964 signal (SIGHUP
, disconnect
);
1966 signal (SIGFPE
, float_handler
);
1968 #if defined(SIGWINCH) && defined(SIGWINCH_HANDLER)
1969 signal (SIGWINCH
, SIGWINCH_HANDLER
);
1973 /* Read one line from the command input stream `instream'
1974 into the local static buffer `linebuffer' (whose current length
1976 The buffer is made bigger as necessary.
1977 Returns the address of the start of the line.
1979 NULL is returned for end of file.
1981 *If* the instream == stdin & stdin is a terminal, the line read
1982 is copied into the file line saver (global var char *line,
1983 length linesize) so that it can be duplicated.
1985 This routine either uses fancy command line editing or
1986 simple input as the user has requested. */
1989 command_line_input (prrompt
, repeat
, annotation_suffix
)
1992 char *annotation_suffix
;
1994 static char *linebuffer
= 0;
1995 static unsigned linelength
= 0;
1999 char *local_prompt
= prrompt
;
2003 /* The annotation suffix must be non-NULL. */
2004 if (annotation_suffix
== NULL
)
2005 annotation_suffix
= "";
2007 if (annotation_level
> 1 && instream
== stdin
)
2009 local_prompt
= alloca ((prrompt
== NULL
? 0 : strlen (prrompt
))
2010 + strlen (annotation_suffix
) + 40);
2011 if (prrompt
== NULL
)
2012 local_prompt
[0] = '\0';
2014 strcpy (local_prompt
, prrompt
);
2015 strcat (local_prompt
, "\n\032\032");
2016 strcat (local_prompt
, annotation_suffix
);
2017 strcat (local_prompt
, "\n");
2020 if (linebuffer
== 0)
2023 linebuffer
= (char *) xmalloc (linelength
);
2028 /* Control-C quits instantly if typed while in this loop
2029 since it should not wait until the user types a newline. */
2033 signal (STOP_SIGNAL
, stop_sig
);
2038 /* Make sure that all output has been output. Some machines may let
2039 you get away with leaving out some of the gdb_flush, but not all. */
2041 gdb_flush (gdb_stdout
);
2042 gdb_flush (gdb_stderr
);
2044 if (source_file_name
!= NULL
)
2046 ++source_line_number
;
2047 sprintf (source_error
,
2048 "%s%s:%d: Error in sourced command file:\n",
2051 source_line_number
);
2052 error_pre_print
= source_error
;
2055 if (annotation_level
> 1 && instream
== stdin
)
2057 printf_unfiltered ("\n\032\032pre-");
2058 printf_unfiltered (annotation_suffix
);
2059 printf_unfiltered ("\n");
2062 /* Don't use fancy stuff if not talking to stdin. */
2063 if (readline_hook
&& instream
== NULL
)
2065 rl
= (*readline_hook
) (local_prompt
);
2067 else if (command_editing_p
&& instream
== stdin
&& ISATTY (instream
))
2069 rl
= readline (local_prompt
);
2073 rl
= gdb_readline (local_prompt
);
2076 if (annotation_level
> 1 && instream
== stdin
)
2078 printf_unfiltered ("\n\032\032post-");
2079 printf_unfiltered (annotation_suffix
);
2080 printf_unfiltered ("\n");
2083 if (!rl
|| rl
== (char *) EOF
)
2088 if (strlen(rl
) + 1 + (p
- linebuffer
) > linelength
)
2090 linelength
= strlen(rl
) + 1 + (p
- linebuffer
);
2091 nline
= (char *) xrealloc (linebuffer
, linelength
);
2092 p
+= nline
- linebuffer
;
2096 /* Copy line. Don't copy null at end. (Leaves line alone
2097 if this was just a newline) */
2101 free (rl
); /* Allocated in readline. */
2103 if (p
== linebuffer
|| *(p
- 1) != '\\')
2106 p
--; /* Put on top of '\'. */
2107 local_prompt
= (char *) 0;
2112 signal (STOP_SIGNAL
, SIG_DFL
);
2119 #define SERVER_COMMAND_LENGTH 7
2121 (p
- linebuffer
> SERVER_COMMAND_LENGTH
)
2122 && STREQN (linebuffer
, "server ", SERVER_COMMAND_LENGTH
);
2125 /* Note that we don't set `line'. Between this and the check in
2126 dont_repeat, this insures that repeating will still do the
2129 return linebuffer
+ SERVER_COMMAND_LENGTH
;
2132 /* Do history expansion if that is wished. */
2133 if (history_expansion_p
&& instream
== stdin
2134 && ISATTY (instream
))
2136 char *history_value
;
2139 *p
= '\0'; /* Insert null now. */
2140 expanded
= history_expand (linebuffer
, &history_value
);
2143 /* Print the changes. */
2144 printf_unfiltered ("%s\n", history_value
);
2146 /* If there was an error, call this function again. */
2149 free (history_value
);
2150 return command_line_input (prrompt
, repeat
, annotation_suffix
);
2152 if (strlen (history_value
) > linelength
)
2154 linelength
= strlen (history_value
) + 1;
2155 linebuffer
= (char *) xrealloc (linebuffer
, linelength
);
2157 strcpy (linebuffer
, history_value
);
2158 p
= linebuffer
+ strlen(linebuffer
);
2159 free (history_value
);
2163 /* If we just got an empty line, and that is supposed
2164 to repeat the previous command, return the value in the
2166 if (repeat
&& p
== linebuffer
)
2168 for (p1
= linebuffer
; *p1
== ' ' || *p1
== '\t'; p1
++) ;
2174 /* Add line to history if appropriate. */
2175 if (instream
== stdin
2176 && ISATTY (stdin
) && *linebuffer
)
2177 add_history (linebuffer
);
2179 /* Note: lines consisting solely of comments are added to the command
2180 history. This is useful when you type a command, and then
2181 realize you don't want to execute it quite yet. You can comment
2182 out the command and then later fetch it from the value history
2183 and remove the '#'. The kill ring is probably better, but some
2184 people are in the habit of commenting things out. */
2186 *p1
= '\0'; /* Found a comment. */
2188 /* Save into global buffer if appropriate. */
2191 if (linelength
> linesize
)
2193 line
= xrealloc (line
, linelength
);
2194 linesize
= linelength
;
2196 strcpy (line
, linebuffer
);
2204 /* Expand the body_list of COMMAND so that it can hold NEW_LENGTH
2205 code bodies. This is typically used when we encounter an "else"
2206 clause for an "if" command. */
2209 realloc_body_list (command
, new_length
)
2210 struct command_line
*command
;
2214 struct command_line
**body_list
;
2216 n
= command
->body_count
;
2218 /* Nothing to do? */
2219 if (new_length
<= n
)
2222 body_list
= (struct command_line
**)
2223 xmalloc (sizeof (struct command_line
*) * new_length
);
2225 memcpy (body_list
, command
->body_list
, sizeof (struct command_line
*) * n
);
2227 free (command
->body_list
);
2228 command
->body_list
= body_list
;
2229 command
->body_count
= new_length
;
2232 /* Read one line from the input stream. If the command is an "else" or
2233 "end", return such an indication to the caller. */
2235 static enum misc_command_type
2236 read_next_line (command
)
2237 struct command_line
**command
;
2239 char *p
, *p1
, *prompt_ptr
, control_prompt
[256];
2242 if (control_level
>= 254)
2243 error ("Control nesting too deep!\n");
2245 /* Set a prompt based on the nesting of the control commands. */
2246 if (instream
== stdin
|| (instream
== 0 && readline_hook
!= NULL
))
2248 for (i
= 0; i
< control_level
; i
++)
2249 control_prompt
[i
] = ' ';
2250 control_prompt
[i
] = '>';
2251 control_prompt
[i
+1] = '\0';
2252 prompt_ptr
= (char *)&control_prompt
[0];
2257 p
= command_line_input (prompt_ptr
, instream
== stdin
, "commands");
2259 /* Not sure what to do here. */
2263 /* Strip leading and trailing whitespace. */
2264 while (*p
== ' ' || *p
== '\t')
2267 p1
= p
+ strlen (p
);
2268 while (p1
!= p
&& (p1
[-1] == ' ' || p1
[-1] == '\t'))
2271 /* Blanks and comments don't really do anything, but we need to
2272 distinguish them from else, end and other commands which can be
2274 if (p1
== p
|| p
[0] == '#')
2277 /* Is this the end of a simple, while, or if control structure? */
2278 if (p1
- p
== 3 && !strncmp (p
, "end", 3))
2281 /* Is the else clause of an if control structure? */
2282 if (p1
- p
== 4 && !strncmp (p
, "else", 4))
2283 return else_command
;
2285 /* Check for while, if, break, continue, etc and build a new command
2286 line structure for them. */
2287 if (p1
- p
> 5 && !strncmp (p
, "while", 5))
2288 *command
= build_command_line (while_control
, p
+ 6);
2289 else if (p1
- p
> 2 && !strncmp (p
, "if", 2))
2290 *command
= build_command_line (if_control
, p
+ 3);
2291 else if (p1
- p
== 10 && !strncmp (p
, "loop_break", 10))
2293 *command
= (struct command_line
*)
2294 xmalloc (sizeof (struct command_line
));
2295 (*command
)->next
= NULL
;
2296 (*command
)->line
= NULL
;
2297 (*command
)->control_type
= break_control
;
2298 (*command
)->body_count
= 0;
2299 (*command
)->body_list
= NULL
;
2301 else if (p1
- p
== 13 && !strncmp (p
, "loop_continue", 13))
2303 *command
= (struct command_line
*)
2304 xmalloc (sizeof (struct command_line
));
2305 (*command
)->next
= NULL
;
2306 (*command
)->line
= NULL
;
2307 (*command
)->control_type
= continue_control
;
2308 (*command
)->body_count
= 0;
2309 (*command
)->body_list
= NULL
;
2313 /* A normal command. */
2314 *command
= (struct command_line
*)
2315 xmalloc (sizeof (struct command_line
));
2316 (*command
)->next
= NULL
;
2317 (*command
)->line
= savestring (p
, p1
- p
);
2318 (*command
)->control_type
= simple_control
;
2319 (*command
)->body_count
= 0;
2320 (*command
)->body_list
= NULL
;
2323 /* Nothing special. */
2327 /* Recursively read in the control structures and create a command_line
2328 structure from them.
2330 The parent_control parameter is the control structure in which the
2331 following commands are nested. */
2333 static enum command_control_type
2334 recurse_read_control_structure (current_cmd
)
2335 struct command_line
*current_cmd
;
2337 int current_body
, i
;
2338 enum misc_command_type val
;
2339 enum command_control_type ret
;
2340 struct command_line
**body_ptr
, *child_tail
, *next
;
2345 /* Sanity checks. */
2346 if (current_cmd
->control_type
== simple_control
)
2348 error ("Recursed on a simple control type\n");
2349 return invalid_control
;
2352 if (current_body
> current_cmd
->body_count
)
2354 error ("Allocated body is smaller than this command type needs\n");
2355 return invalid_control
;
2358 /* Read lines from the input stream and build control structures. */
2364 val
= read_next_line (&next
);
2366 /* Just skip blanks and comments. */
2367 if (val
== nop_command
)
2370 if (val
== end_command
)
2372 if (current_cmd
->control_type
== while_control
2373 || current_cmd
->control_type
== if_control
)
2375 /* Success reading an entire control structure. */
2376 ret
= simple_control
;
2381 ret
= invalid_control
;
2386 /* Not the end of a control structure. */
2387 if (val
== else_command
)
2389 if (current_cmd
->control_type
== if_control
2390 && current_body
== 1)
2392 realloc_body_list (current_cmd
, 2);
2399 ret
= invalid_control
;
2406 child_tail
->next
= next
;
2410 body_ptr
= current_cmd
->body_list
;
2411 for (i
= 1; i
< current_body
; i
++)
2420 /* If the latest line is another control structure, then recurse
2422 if (next
->control_type
== while_control
2423 || next
->control_type
== if_control
)
2426 ret
= recurse_read_control_structure (next
);
2429 if (ret
!= simple_control
)
2439 /* Read lines from the input stream and accumulate them in a chain of
2440 struct command_line's, which is then returned. For input from a
2441 terminal, the special command "end" is used to mark the end of the
2442 input, and is not included in the returned chain of commands. */
2444 #define END_MESSAGE "End with a line saying just \"end\"."
2446 struct command_line
*
2447 read_command_lines (prompt
, from_tty
)
2451 struct command_line
*head
, *tail
, *next
;
2452 struct cleanup
*old_chain
;
2453 enum command_control_type ret
;
2454 enum misc_command_type val
;
2456 if (readline_begin_hook
)
2458 /* Note - intentional to merge messages with no newline */
2459 (*readline_begin_hook
) ("%s %s\n", prompt
, END_MESSAGE
);
2461 else if (from_tty
&& input_from_terminal_p ())
2463 printf_unfiltered ("%s\n%s\n", prompt
, END_MESSAGE
);
2464 gdb_flush (gdb_stdout
);
2472 val
= read_next_line (&next
);
2474 /* Ignore blank lines or comments. */
2475 if (val
== nop_command
)
2478 if (val
== end_command
)
2480 ret
= simple_control
;
2484 if (val
!= ok_command
)
2486 ret
= invalid_control
;
2490 if (next
->control_type
== while_control
2491 || next
->control_type
== if_control
)
2494 ret
= recurse_read_control_structure (next
);
2497 if (ret
== invalid_control
)
2508 old_chain
= make_cleanup ((make_cleanup_func
) free_command_lines
,
2518 if (ret
!= invalid_control
)
2520 discard_cleanups (old_chain
);
2523 do_cleanups (old_chain
);
2526 if (readline_end_hook
)
2528 (*readline_end_hook
) ();
2533 /* Free a chain of struct command_line's. */
2536 free_command_lines (lptr
)
2537 struct command_line
**lptr
;
2539 register struct command_line
*l
= *lptr
;
2540 register struct command_line
*next
;
2541 struct command_line
**blist
;
2546 if (l
->body_count
> 0)
2548 blist
= l
->body_list
;
2549 for (i
= 0; i
< l
->body_count
; i
++, blist
++)
2550 free_command_lines (blist
);
2559 /* Add an element to the list of info subcommands. */
2562 add_info (name
, fun
, doc
)
2564 void (*fun
) PARAMS ((char *, int));
2567 add_cmd (name
, no_class
, fun
, doc
, &infolist
);
2570 /* Add an alias to the list of info subcommands. */
2573 add_info_alias (name
, oldname
, abbrev_flag
)
2578 add_alias_cmd (name
, oldname
, 0, abbrev_flag
, &infolist
);
2581 /* The "info" command is defined as a prefix, with allow_unknown = 0.
2582 Therefore, its own definition is called only for "info" with no args. */
2586 info_command (arg
, from_tty
)
2590 printf_unfiltered ("\"info\" must be followed by the name of an info command.\n");
2591 help_list (infolist
, "info ", -1, gdb_stdout
);
2594 /* The "complete" command is used by Emacs to implement completion. */
2598 complete_command (arg
, from_tty
)
2610 argpoint
= strlen (arg
);
2612 for (completion
= line_completion_function (arg
, i
= 0, arg
, argpoint
);
2614 completion
= line_completion_function (arg
, ++i
, arg
, argpoint
))
2616 printf_unfiltered ("%s\n", completion
);
2621 /* The "show" command with no arguments shows all the settings. */
2625 show_command (arg
, from_tty
)
2629 cmd_show_list (showlist
, from_tty
, "");
2632 /* Add an element to the list of commands. */
2635 add_com (name
, class, fun
, doc
)
2637 enum command_class
class;
2638 void (*fun
) PARAMS ((char *, int));
2641 add_cmd (name
, class, fun
, doc
, &cmdlist
);
2644 /* Add an alias or abbreviation command to the list of commands. */
2647 add_com_alias (name
, oldname
, class, abbrev_flag
)
2650 enum command_class
class;
2653 add_alias_cmd (name
, oldname
, class, abbrev_flag
, &cmdlist
);
2660 error ("Argument required (%s).", why
);
2665 help_command (command
, from_tty
)
2667 int from_tty
; /* Ignored */
2669 help_cmd (command
, gdb_stdout
);
2673 validate_comname (comname
)
2679 error_no_arg ("name of command to define");
2684 if (!isalnum(*p
) && *p
!= '-' && *p
!= '_')
2685 error ("Junk in argument list: \"%s\"", p
);
2690 /* This is just a placeholder in the command data structures. */
2692 user_defined_command (ignore
, from_tty
)
2699 define_command (comname
, from_tty
)
2703 register struct command_line
*cmds
;
2704 register struct cmd_list_element
*c
, *newc
, *hookc
= 0;
2705 char *tem
= comname
;
2707 #define HOOK_STRING "hook-"
2710 validate_comname (comname
);
2712 /* Look it up, and verify that we got an exact match. */
2713 c
= lookup_cmd (&tem
, cmdlist
, "", -1, 1);
2714 if (c
&& !STREQ (comname
, c
->name
))
2719 if (c
->class == class_user
|| c
->class == class_alias
)
2720 tem
= "Redefine command \"%s\"? ";
2722 tem
= "Really redefine built-in command \"%s\"? ";
2723 if (!query (tem
, c
->name
))
2724 error ("Command \"%s\" not redefined.", c
->name
);
2727 /* If this new command is a hook, then mark the command which it
2728 is hooking. Note that we allow hooking `help' commands, so that
2729 we can hook the `stop' pseudo-command. */
2731 if (!strncmp (comname
, HOOK_STRING
, HOOK_LEN
))
2733 /* Look up cmd it hooks, and verify that we got an exact match. */
2734 tem
= comname
+HOOK_LEN
;
2735 hookc
= lookup_cmd (&tem
, cmdlist
, "", -1, 0);
2736 if (hookc
&& !STREQ (comname
+HOOK_LEN
, hookc
->name
))
2740 warning ("Your new `%s' command does not hook any existing command.",
2742 if (!query ("Proceed? "))
2743 error ("Not confirmed.");
2747 comname
= savestring (comname
, strlen (comname
));
2749 /* If the rest of the commands will be case insensitive, this one
2750 should behave in the same manner. */
2751 for (tem
= comname
; *tem
; tem
++)
2752 if (isupper(*tem
)) *tem
= tolower(*tem
);
2755 sprintf (tmpbuf
, "Type commands for definition of \"%s\".", comname
);
2756 cmds
= read_command_lines (tmpbuf
, from_tty
);
2758 if (c
&& c
->class == class_user
)
2759 free_command_lines (&c
->user_commands
);
2761 newc
= add_cmd (comname
, class_user
, user_defined_command
,
2762 (c
&& c
->class == class_user
)
2763 ? c
->doc
: savestring ("User-defined.", 13), &cmdlist
);
2764 newc
->user_commands
= cmds
;
2766 /* If this new command is a hook, then mark both commands as being
2770 hookc
->hook
= newc
; /* Target gets hooked. */
2771 newc
->hookee
= hookc
; /* We are marked as hooking target cmd. */
2776 document_command (comname
, from_tty
)
2780 struct command_line
*doclines
;
2781 register struct cmd_list_element
*c
;
2782 char *tem
= comname
;
2785 validate_comname (comname
);
2787 c
= lookup_cmd (&tem
, cmdlist
, "", 0, 1);
2789 if (c
->class != class_user
)
2790 error ("Command \"%s\" is built-in.", comname
);
2792 sprintf (tmpbuf
, "Type documentation for \"%s\".", comname
);
2793 doclines
= read_command_lines (tmpbuf
, from_tty
);
2795 if (c
->doc
) free (c
->doc
);
2798 register struct command_line
*cl1
;
2799 register int len
= 0;
2801 for (cl1
= doclines
; cl1
; cl1
= cl1
->next
)
2802 len
+= strlen (cl1
->line
) + 1;
2804 c
->doc
= (char *) xmalloc (len
+ 1);
2807 for (cl1
= doclines
; cl1
; cl1
= cl1
->next
)
2809 strcat (c
->doc
, cl1
->line
);
2811 strcat (c
->doc
, "\n");
2815 free_command_lines (&doclines
);
2819 print_gdb_version (stream
)
2822 /* From GNU coding standards, first line is meant to be easy for a
2823 program to parse, and is just canonical program name and version
2824 number, which starts after last space. */
2826 fprintf_filtered (stream
, "GNU gdb %s\n", version
);
2828 /* Second line is a copyright notice. */
2830 fprintf_filtered (stream
, "Copyright 1998 Free Software Foundation, Inc.\n");
2832 /* Following the copyright is a brief statement that the program is
2833 free software, that users are free to copy and change it on
2834 certain conditions, that it is covered by the GNU GPL, and that
2835 there is no warranty. */
2837 fprintf_filtered (stream
, "\
2838 GDB is free software, covered by the GNU General Public License, and you are\n\
2839 welcome to change it and/or distribute copies of it under certain conditions.\n\
2840 Type \"show copying\" to see the conditions.\n\
2841 There is absolutely no warranty for GDB. Type \"show warranty\" for details.\n");
2843 /* After the required info we print the configuration information. */
2845 fprintf_filtered (stream
, "This GDB was configured as \"");
2846 if (!STREQ (host_name
, target_name
))
2848 fprintf_filtered (stream
, "--host=%s --target=%s", host_name
, target_name
);
2852 fprintf_filtered (stream
, "%s", host_name
);
2854 fprintf_filtered (stream
, "\".");
2859 show_version (args
, from_tty
)
2864 print_gdb_version (gdb_stdout
);
2865 printf_filtered ("\n");
2869 /* xgdb calls this to reprint the usual GDB prompt. Obsolete now that xgdb
2875 printf_unfiltered ("%s", prompt
);
2876 gdb_flush (gdb_stdout
);
2879 /* This replaces the above for the frontends: it returns a pointer
2887 /* If necessary, make the user confirm that we should quit. Return
2888 non-zero if we should quit, zero if we shouldn't. */
2893 if (inferior_pid
!= 0 && target_has_execution
)
2897 /* This is something of a hack. But there's no reliable way to
2898 see if a GUI is running. The `use_windows' variable doesn't
2901 s
= "A debugging session is active.\nDo you still want to close the debugger?";
2902 else if (attach_flag
)
2903 s
= "The program is running. Quit anyway (and detach it)? ";
2905 s
= "The program is running. Exit anyway? ";
2914 /* Quit without asking for confirmation. */
2917 quit_force (args
, from_tty
)
2923 /* An optional expression may be used to cause gdb to terminate with the
2924 value of that expression. */
2927 value_ptr val
= parse_and_eval (args
);
2929 exit_code
= (int) value_as_long (val
);
2932 if (inferior_pid
!= 0 && target_has_execution
)
2935 target_detach (args
, from_tty
);
2940 /* UDI wants this, to kill the TIP. */
2943 /* Save the history information if it is appropriate to do so. */
2944 if (write_history_p
&& history_filename
)
2945 write_history (history_filename
);
2947 do_final_cleanups(ALL_CLEANUPS
); /* Do any final cleanups before exiting */
2952 /* Handle the quit command. */
2955 quit_command (args
, from_tty
)
2959 if (! quit_confirm ())
2960 error ("Not confirmed.");
2961 quit_force (args
, from_tty
);
2964 /* Returns whether GDB is running on a terminal and whether the user
2965 desires that questions be asked of them on that terminal. */
2968 input_from_terminal_p ()
2970 return gdb_has_a_terminal () && (instream
== stdin
) & caution
;
2975 pwd_command (args
, from_tty
)
2979 if (args
) error ("The \"pwd\" command does not take an argument: %s", args
);
2980 getcwd (gdb_dirbuf
, sizeof (gdb_dirbuf
));
2982 if (!STREQ (gdb_dirbuf
, current_directory
))
2983 printf_unfiltered ("Working directory %s\n (canonically %s).\n",
2984 current_directory
, gdb_dirbuf
);
2986 printf_unfiltered ("Working directory %s.\n", current_directory
);
2990 cd_command (dir
, from_tty
)
2995 /* Found something other than leading repetitions of "/..". */
2996 int found_real_path
;
2999 /* If the new directory is absolute, repeat is a no-op; if relative,
3000 repeat might be useful but is more likely to be a mistake. */
3004 error_no_arg ("new working directory");
3006 dir
= tilde_expand (dir
);
3007 make_cleanup (free
, dir
);
3009 if (chdir (dir
) < 0)
3010 perror_with_name (dir
);
3013 dir
= savestring (dir
, len
- (len
> 1 && SLASH_P(dir
[len
-1])));
3015 current_directory
= dir
;
3018 if (SLASH_P (current_directory
[0]) && current_directory
[1] == '\0')
3019 current_directory
= concat (current_directory
, dir
, NULL
);
3021 current_directory
= concat (current_directory
, SLASH_STRING
, dir
, NULL
);
3025 /* Now simplify any occurrences of `.' and `..' in the pathname. */
3027 found_real_path
= 0;
3028 for (p
= current_directory
; *p
;)
3030 if (SLASH_P (p
[0]) && p
[1] == '.' && (p
[2] == 0 || SLASH_P (p
[2])))
3032 else if (SLASH_P (p
[0]) && p
[1] == '.' && p
[2] == '.'
3033 && (p
[3] == 0 || SLASH_P (p
[3])))
3035 if (found_real_path
)
3037 /* Search backwards for the directory just before the "/.."
3038 and obliterate it and the "/..". */
3040 while (q
!= current_directory
&& ! SLASH_P (q
[-1]))
3043 if (q
== current_directory
)
3044 /* current_directory is
3045 a relative pathname ("can't happen"--leave it alone). */
3049 strcpy (q
- 1, p
+ 3);
3054 /* We are dealing with leading repetitions of "/..", for example
3055 "/../..", which is the Mach super-root. */
3060 found_real_path
= 1;
3065 forget_cached_source_info ();
3068 pwd_command ((char *) 0, 1);
3071 struct source_cleanup_lines_args
{
3074 char *old_pre_error
;
3075 char *old_error_pre_print
;
3079 source_cleanup_lines (args
)
3082 struct source_cleanup_lines_args
*p
=
3083 (struct source_cleanup_lines_args
*)args
;
3084 source_line_number
= p
->old_line
;
3085 source_file_name
= p
->old_file
;
3086 source_pre_error
= p
->old_pre_error
;
3087 error_pre_print
= p
->old_error_pre_print
;
3092 source_command (args
, from_tty
)
3097 struct cleanup
*old_cleanups
;
3099 struct source_cleanup_lines_args old_lines
;
3104 error ("source command requires pathname of file to source.");
3107 file
= tilde_expand (file
);
3108 old_cleanups
= make_cleanup (free
, file
);
3110 stream
= fopen (file
, FOPEN_RT
);
3113 perror_with_name (file
);
3117 make_cleanup ((make_cleanup_func
) fclose
, stream
);
3119 old_lines
.old_line
= source_line_number
;
3120 old_lines
.old_file
= source_file_name
;
3121 old_lines
.old_pre_error
= source_pre_error
;
3122 old_lines
.old_error_pre_print
= error_pre_print
;
3123 make_cleanup (source_cleanup_lines
, &old_lines
);
3124 source_line_number
= 0;
3125 source_file_name
= file
;
3126 source_pre_error
= error_pre_print
== NULL
? "" : error_pre_print
;
3127 source_pre_error
= savestring (source_pre_error
, strlen (source_pre_error
));
3128 make_cleanup (free
, source_pre_error
);
3129 /* This will get set every time we read a line. So it won't stay "" for
3131 error_pre_print
= "";
3133 needed_length
= strlen (source_file_name
) + strlen (source_pre_error
) + 80;
3134 if (source_error_allocated
< needed_length
)
3136 source_error_allocated
*= 2;
3137 if (source_error_allocated
< needed_length
)
3138 source_error_allocated
= needed_length
;
3139 if (source_error
== NULL
)
3140 source_error
= xmalloc (source_error_allocated
);
3142 source_error
= xrealloc (source_error
, source_error_allocated
);
3145 read_command_file (stream
);
3147 do_cleanups (old_cleanups
);
3152 echo_command (text
, from_tty
)
3160 while ((c
= *p
++) != '\0')
3164 /* \ at end of argument is used after spaces
3165 so they won't be lost. */
3169 c
= parse_escape (&p
);
3171 printf_filtered ("%c", c
);
3174 printf_filtered ("%c", c
);
3177 /* Force this output to appear now. */
3179 gdb_flush (gdb_stdout
);
3184 dont_repeat_command (ignored
, from_tty
)
3188 *line
= 0; /* Can't call dont_repeat here because we're not
3189 necessarily reading from stdin. */
3192 /* Functions to manipulate the endianness of the target. */
3194 #ifdef TARGET_BYTE_ORDER_SELECTABLE
3195 #ifndef TARGET_BYTE_ORDER_DEFAULT
3196 #define TARGET_BYTE_ORDER_DEFAULT BIG_ENDIAN
3198 int target_byte_order
= TARGET_BYTE_ORDER_DEFAULT
;
3199 int target_byte_order_auto
= 1;
3201 static int target_byte_order_auto
= 0;
3204 /* Called if the user enters ``set endian'' without an argument. */
3206 set_endian (args
, from_tty
)
3210 printf_unfiltered ("\"set endian\" must be followed by \"auto\", \"big\" or \"little\".\n");
3211 show_endian (args
, from_tty
);
3214 /* Called by ``set endian big''. */
3216 set_endian_big (args
, from_tty
)
3220 #ifdef TARGET_BYTE_ORDER_SELECTABLE
3221 target_byte_order
= BIG_ENDIAN
;
3222 target_byte_order_auto
= 0;
3224 printf_unfiltered ("Byte order is not selectable.");
3225 show_endian (args
, from_tty
);
3229 /* Called by ``set endian little''. */
3231 set_endian_little (args
, from_tty
)
3235 #ifdef TARGET_BYTE_ORDER_SELECTABLE
3236 target_byte_order
= LITTLE_ENDIAN
;
3237 target_byte_order_auto
= 0;
3239 printf_unfiltered ("Byte order is not selectable.");
3240 show_endian (args
, from_tty
);
3244 /* Called by ``set endian auto''. */
3246 set_endian_auto (args
, from_tty
)
3250 #ifdef TARGET_BYTE_ORDER_SELECTABLE
3251 target_byte_order_auto
= 1;
3253 printf_unfiltered ("Byte order is not selectable.");
3254 show_endian (args
, from_tty
);
3258 /* Called by ``show endian''. */
3260 show_endian (args
, from_tty
)
3265 (target_byte_order_auto
3266 ? "The target endianness is set automatically (currently %s endian)\n"
3267 : "The target is assumed to be %s endian\n");
3268 printf_unfiltered ((char *) msg
, TARGET_BYTE_ORDER
== BIG_ENDIAN
? "big" : "little");
3271 /* Set the endianness from a BFD. */
3273 set_endian_from_file (abfd
)
3276 #ifdef TARGET_BYTE_ORDER_SELECTABLE
3279 if (bfd_big_endian (abfd
))
3282 want
= LITTLE_ENDIAN
;
3283 if (target_byte_order_auto
)
3284 target_byte_order
= want
;
3285 else if (target_byte_order
!= want
)
3286 warning ("%s endian file does not match %s endian target.",
3287 want
== BIG_ENDIAN
? "big" : "little",
3288 TARGET_BYTE_ORDER
== BIG_ENDIAN
? "big" : "little");
3290 #else /* ! defined (TARGET_BYTE_ORDER_SELECTABLE) */
3292 if (bfd_big_endian (abfd
)
3293 ? TARGET_BYTE_ORDER
!= BIG_ENDIAN
3294 : TARGET_BYTE_ORDER
== BIG_ENDIAN
)
3295 warning ("%s endian file does not match %s endian target.",
3296 bfd_big_endian (abfd
) ? "big" : "little",
3297 TARGET_BYTE_ORDER
== BIG_ENDIAN
? "big" : "little");
3299 #endif /* ! defined (TARGET_BYTE_ORDER_SELECTABLE) */
3302 /* Functions to manipulate the architecture of the target */
3304 int target_architecture_auto
= 1;
3305 extern const bfd_arch_info_type bfd_default_arch_struct
;
3306 const bfd_arch_info_type
*target_architecture
= &bfd_default_arch_struct
;
3307 int (*target_architecture_hook
) PARAMS ((const bfd_arch_info_type
*ap
));
3311 const bfd_arch_info_type
*arch
;
3313 /* FIXME: Is it compatible with gdb? */
3314 /* Check with the target on the setting */
3315 if (target_architecture_hook
!= NULL
3316 && !target_architecture_hook (arch
))
3317 printf_unfiltered ("Target does not support `%s' architecture.\n",
3318 arch
->printable_name
);
3321 target_architecture_auto
= 0;
3322 target_architecture
= arch
;
3327 /* Called if the user enters ``set architecture'' with or without an
3330 set_architecture (args
, from_tty
)
3336 printf_unfiltered ("\"set architecture\" must be followed by \"auto\" or an architecture name.\n");
3338 else if (strcmp (args
, "auto") == 0)
3340 target_architecture_auto
= 1;
3344 const bfd_arch_info_type
*arch
= bfd_scan_arch (args
);
3348 printf_unfiltered ("Architecture `%s' not reconized.\n", args
);
3352 /* Called if the user enters ``show architecture'' without an argument. */
3354 show_architecture (args
, from_tty
)
3359 arch
= target_architecture
->printable_name
;
3360 if (target_architecture_auto
)
3361 printf_filtered ("The target architecture is set automatically (currently %s)\n", arch
);
3363 printf_filtered ("The target architecture is assumed to be %s\n", arch
);
3366 /* Called if the user enters ``info architecture'' without an argument. */
3368 info_architecture (args
, from_tty
)
3372 enum bfd_architecture a
;
3373 printf_filtered ("Available architectures are:\n");
3374 for (a
= bfd_arch_obscure
+ 1; a
< bfd_arch_last
; a
++)
3376 const bfd_arch_info_type
*ap
= bfd_lookup_arch (a
, 0);
3381 printf_filtered (" %s", ap
->printable_name
);
3385 printf_filtered ("\n");
3390 /* Set the architecture from arch/machine */
3392 set_architecture_from_arch_mach (arch
, mach
)
3393 enum bfd_architecture arch
;
3396 const bfd_arch_info_type
*wanted
= bfd_lookup_arch (arch
, mach
);
3400 fatal ("hardwired architecture/machine not reconized");
3404 /* Set the architecture from a BFD */
3406 set_architecture_from_file (abfd
)
3409 const bfd_arch_info_type
*wanted
= bfd_get_arch_info (abfd
);
3410 if (target_architecture_auto
)
3412 if (target_architecture_hook
!= NULL
3413 && !target_architecture_hook (wanted
))
3414 warning ("Target may not support %s architecture",
3415 wanted
->printable_name
);
3416 target_architecture
= wanted
;
3418 else if (wanted
!= target_architecture
)
3420 warning ("%s architecture file may be incompatible with %s target.",
3421 wanted
->printable_name
,
3422 target_architecture
->printable_name
);
3426 /* Functions to manipulate command line editing control variables. */
3428 /* Number of commands to print in each call to show_commands. */
3429 #define Hist_print 10
3431 show_commands (args
, from_tty
)
3435 /* Index for history commands. Relative to history_base. */
3438 /* Number of the history entry which we are planning to display next.
3439 Relative to history_base. */
3442 /* The first command in the history which doesn't exist (i.e. one more
3443 than the number of the last command). Relative to history_base. */
3446 extern HIST_ENTRY
*history_get
PARAMS ((int));
3448 /* Print out some of the commands from the command history. */
3449 /* First determine the length of the history list. */
3450 hist_len
= history_size
;
3451 for (offset
= 0; offset
< history_size
; offset
++)
3453 if (!history_get (history_base
+ offset
))
3462 if (args
[0] == '+' && args
[1] == '\0')
3463 /* "info editing +" should print from the stored position. */
3466 /* "info editing <exp>" should print around command number <exp>. */
3467 num
= (parse_and_eval_address (args
) - history_base
) - Hist_print
/ 2;
3469 /* "show commands" means print the last Hist_print commands. */
3472 num
= hist_len
- Hist_print
;
3478 /* If there are at least Hist_print commands, we want to display the last
3479 Hist_print rather than, say, the last 6. */
3480 if (hist_len
- num
< Hist_print
)
3482 num
= hist_len
- Hist_print
;
3487 for (offset
= num
; offset
< num
+ Hist_print
&& offset
< hist_len
; offset
++)
3489 printf_filtered ("%5d %s\n", history_base
+ offset
,
3490 (history_get (history_base
+ offset
))->line
);
3493 /* The next command we want to display is the next one that we haven't
3497 /* If the user repeats this command with return, it should do what
3498 "show commands +" does. This is unnecessary if arg is null,
3499 because "show commands +" is not useful after "show commands". */
3500 if (from_tty
&& args
)
3507 /* Called by do_setshow_command. */
3510 set_history_size_command (args
, from_tty
, c
)
3513 struct cmd_list_element
*c
;
3515 if (history_size
== INT_MAX
)
3516 unstifle_history ();
3517 else if (history_size
>= 0)
3518 stifle_history (history_size
);
3521 history_size
= INT_MAX
;
3522 error ("History size must be non-negative");
3528 set_history (args
, from_tty
)
3532 printf_unfiltered ("\"set history\" must be followed by the name of a history subcommand.\n");
3533 help_list (sethistlist
, "set history ", -1, gdb_stdout
);
3538 show_history (args
, from_tty
)
3542 cmd_show_list (showhistlist
, from_tty
, "");
3545 int info_verbose
= 0; /* Default verbose msgs off */
3547 /* Called by do_setshow_command. An elaborate joke. */
3550 set_verbose (args
, from_tty
, c
)
3553 struct cmd_list_element
*c
;
3555 char *cmdname
= "verbose";
3556 struct cmd_list_element
*showcmd
;
3558 showcmd
= lookup_cmd_1 (&cmdname
, showlist
, NULL
, 1);
3562 c
->doc
= "Set verbose printing of informational messages.";
3563 showcmd
->doc
= "Show verbose printing of informational messages.";
3567 c
->doc
= "Set verbosity.";
3568 showcmd
->doc
= "Show verbosity.";
3573 float_handler (signo
)
3576 /* This message is based on ANSI C, section 4.7. Note that integer
3577 divide by zero causes this, so "float" is a misnomer. */
3578 signal (SIGFPE
, float_handler
);
3579 error ("Erroneous arithmetic operation.");
3591 enablebreaklist
= NULL
;
3597 showhistlist
= NULL
;
3598 unsethistlist
= NULL
;
3599 #if MAINTENANCE_CMDS
3600 maintenancelist
= NULL
;
3601 maintenanceinfolist
= NULL
;
3602 maintenanceprintlist
= NULL
;
3604 setprintlist
= NULL
;
3605 showprintlist
= NULL
;
3606 setchecklist
= NULL
;
3607 showchecklist
= NULL
;
3610 /* Init the history buffer. Note that we are called after the init file(s)
3611 * have been read so that the user can change the history file via his
3612 * .gdbinit file (for instance). The GDBHISTFILE environment variable
3613 * overrides all of this.
3621 tmpenv
= getenv ("HISTSIZE");
3623 history_size
= atoi (tmpenv
);
3624 else if (!history_size
)
3627 stifle_history (history_size
);
3629 tmpenv
= getenv ("GDBHISTFILE");
3631 history_filename
= savestring (tmpenv
, strlen(tmpenv
));
3632 else if (!history_filename
) {
3633 /* We include the current directory so that if the user changes
3634 directories the file written will be the same as the one
3636 history_filename
= concat (current_directory
, "/.gdb_history", NULL
);
3638 read_history (history_filename
);
3644 struct cmd_list_element
*c
;
3646 add_prefix_cmd ("endian", class_support
, set_endian
,
3647 "Set endianness of target.",
3648 &endianlist
, "set endian ", 0, &setlist
);
3649 add_cmd ("big", class_support
, set_endian_big
,
3650 "Set target as being big endian.", &endianlist
);
3651 add_cmd ("little", class_support
, set_endian_little
,
3652 "Set target as being little endian.", &endianlist
);
3653 add_cmd ("auto", class_support
, set_endian_auto
,
3654 "Select target endianness automatically.", &endianlist
);
3655 add_cmd ("endian", class_support
, show_endian
,
3656 "Show endianness of target.", &showlist
);
3658 add_cmd ("architecture", class_support
, set_architecture
,
3659 "Set architecture of target.", &setlist
);
3660 add_alias_cmd ("processor", "architecture", class_support
, 1, &setlist
);
3661 add_cmd ("architecture", class_support
, show_architecture
,
3662 "Show architecture of target.", &showlist
);
3663 add_cmd ("architecture", class_support
, info_architecture
,
3664 "List supported target architectures", &infolist
);
3667 #ifdef DEFAULT_PROMPT
3668 prompt
= savestring (DEFAULT_PROMPT
, strlen(DEFAULT_PROMPT
));
3670 prompt
= savestring ("(gdb) ", 6);
3673 /* Set the important stuff up for command editing. */
3674 command_editing_p
= 1;
3675 history_expansion_p
= 0;
3676 write_history_p
= 0;
3678 /* Setup important stuff for command line editing. */
3679 rl_completion_entry_function
= (int (*)()) readline_line_completion_function
;
3680 rl_completer_word_break_characters
= gdb_completer_word_break_characters
;
3681 rl_completer_quote_characters
= gdb_completer_quote_characters
;
3682 rl_readline_name
= "gdb";
3684 /* Define the classes of commands.
3685 They will appear in the help list in the reverse of this order. */
3687 add_cmd ("internals", class_maintenance
, NO_FUNCTION
,
3688 "Maintenance commands.\n\
3689 Some gdb commands are provided just for use by gdb maintainers.\n\
3690 These commands are subject to frequent change, and may not be as\n\
3691 well documented as user commands.",
3693 add_cmd ("obscure", class_obscure
, NO_FUNCTION
, "Obscure features.", &cmdlist
);
3694 add_cmd ("aliases", class_alias
, NO_FUNCTION
, "Aliases of other commands.", &cmdlist
);
3695 add_cmd ("user-defined", class_user
, NO_FUNCTION
, "User-defined commands.\n\
3696 The commands in this class are those defined by the user.\n\
3697 Use the \"define\" command to define a command.", &cmdlist
);
3698 add_cmd ("support", class_support
, NO_FUNCTION
, "Support facilities.", &cmdlist
);
3699 add_cmd ("status", class_info
, NO_FUNCTION
, "Status inquiries.", &cmdlist
);
3700 add_cmd ("files", class_files
, NO_FUNCTION
, "Specifying and examining files.", &cmdlist
);
3701 add_cmd ("breakpoints", class_breakpoint
, NO_FUNCTION
, "Making program stop at certain points.", &cmdlist
);
3702 add_cmd ("data", class_vars
, NO_FUNCTION
, "Examining data.", &cmdlist
);
3703 add_cmd ("stack", class_stack
, NO_FUNCTION
, "Examining the stack.\n\
3704 The stack is made up of stack frames. Gdb assigns numbers to stack frames\n\
3705 counting from zero for the innermost (currently executing) frame.\n\n\
3706 At any time gdb identifies one frame as the \"selected\" frame.\n\
3707 Variable lookups are done with respect to the selected frame.\n\
3708 When the program being debugged stops, gdb selects the innermost frame.\n\
3709 The commands below can be used to select other frames by number or address.",
3711 add_cmd ("running", class_run
, NO_FUNCTION
, "Running the program.", &cmdlist
);
3713 add_com ("pwd", class_files
, pwd_command
,
3714 "Print working directory. This is used for your program as well.");
3715 c
= add_cmd ("cd", class_files
, cd_command
,
3716 "Set working directory to DIR for debugger and program being debugged.\n\
3717 The change does not take effect for the program being debugged\n\
3718 until the next time it is started.", &cmdlist
);
3719 c
->completer
= filename_completer
;
3722 (add_set_cmd ("prompt", class_support
, var_string
, (char *)&prompt
,
3727 add_com ("echo", class_support
, echo_command
,
3728 "Print a constant string. Give string as argument.\n\
3729 C escape sequences may be used in the argument.\n\
3730 No newline is added at the end of the argument;\n\
3731 use \"\\n\" if you want a newline to be printed.\n\
3732 Since leading and trailing whitespace are ignored in command arguments,\n\
3733 if you want to print some you must use \"\\\" before leading whitespace\n\
3734 to be printed or after trailing whitespace.");
3735 add_com ("document", class_support
, document_command
,
3736 "Document a user-defined command.\n\
3737 Give command name as argument. Give documentation on following lines.\n\
3738 End with a line of just \"end\".");
3739 add_com ("define", class_support
, define_command
,
3740 "Define a new command name. Command name is argument.\n\
3741 Definition appears on following lines, one command per line.\n\
3742 End with a line of just \"end\".\n\
3743 Use the \"document\" command to give documentation for the new command.\n\
3744 Commands defined in this way may have up to ten arguments.");
3747 c
= add_cmd ("source", class_support
, source_command
,
3748 "Read commands from a file named FILE.\n\
3749 Note that the file \"" GDBINIT_FILENAME
"\" is read automatically in this way\n\
3750 when gdb is started.", &cmdlist
);
3752 /* Punt file name, we can't help it easily. */
3753 c
= add_cmd ("source", class_support
, source_command
,
3754 "Read commands from a file named FILE.\n\
3755 Note that the file \".gdbinit\" is read automatically in this way\n\
3756 when gdb is started.", &cmdlist
);
3758 c
->completer
= filename_completer
;
3760 add_com ("quit", class_support
, quit_command
, "Exit gdb.");
3761 add_com ("help", class_support
, help_command
, "Print list of commands.");
3762 add_com_alias ("q", "quit", class_support
, 1);
3763 add_com_alias ("h", "help", class_support
, 1);
3765 add_com ("dont-repeat", class_support
, dont_repeat_command
, "Don't repeat this command.\n\
3766 Primarily used inside of user-defined commands that should not be repeated when\n\
3769 c
= add_set_cmd ("verbose", class_support
, var_boolean
, (char *)&info_verbose
,
3772 add_show_from_set (c
, &showlist
);
3773 c
->function
.sfunc
= set_verbose
;
3774 set_verbose (NULL
, 0, c
);
3777 (add_set_cmd ("editing", class_support
, var_boolean
, (char *)&command_editing_p
,
3778 "Set editing of command lines as they are typed.\n\
3779 Use \"on\" to enable the editing, and \"off\" to disable it.\n\
3780 Without an argument, command line editing is enabled. To edit, use\n\
3781 EMACS-like or VI-like commands like control-P or ESC.", &setlist
),
3784 add_prefix_cmd ("history", class_support
, set_history
,
3785 "Generic command for setting command history parameters.",
3786 &sethistlist
, "set history ", 0, &setlist
);
3787 add_prefix_cmd ("history", class_support
, show_history
,
3788 "Generic command for showing command history parameters.",
3789 &showhistlist
, "show history ", 0, &showlist
);
3792 (add_set_cmd ("expansion", no_class
, var_boolean
, (char *)&history_expansion_p
,
3793 "Set history expansion on command input.\n\
3794 Without an argument, history expansion is enabled.", &sethistlist
),
3798 (add_set_cmd ("save", no_class
, var_boolean
, (char *)&write_history_p
,
3799 "Set saving of the history record on exit.\n\
3800 Use \"on\" to enable the saving, and \"off\" to disable it.\n\
3801 Without an argument, saving is enabled.", &sethistlist
),
3804 c
= add_set_cmd ("size", no_class
, var_integer
, (char *)&history_size
,
3805 "Set the size of the command history, \n\
3806 ie. the number of previous commands to keep a record of.", &sethistlist
);
3807 add_show_from_set (c
, &showhistlist
);
3808 c
->function
.sfunc
= set_history_size_command
;
3811 (add_set_cmd ("filename", no_class
, var_filename
, (char *)&history_filename
,
3812 "Set the filename in which to record the command history\n\
3813 (the list of previous commands of which a record is kept).", &sethistlist
),
3817 (add_set_cmd ("confirm", class_support
, var_boolean
,
3819 "Set whether to confirm potentially dangerous operations.",
3823 add_prefix_cmd ("info", class_info
, info_command
,
3824 "Generic command for showing things about the program being debugged.",
3825 &infolist
, "info ", 0, &cmdlist
);
3826 add_com_alias ("i", "info", class_info
, 1);
3828 add_com ("complete", class_obscure
, complete_command
,
3829 "List the completions for the rest of the line as a command.");
3831 add_prefix_cmd ("show", class_info
, show_command
,
3832 "Generic command for showing things about the debugger.",
3833 &showlist
, "show ", 0, &cmdlist
);
3834 /* Another way to get at the same thing. */
3835 add_info ("set", show_command
, "Show all GDB settings.");
3837 add_cmd ("commands", no_class
, show_commands
,
3838 "Show the history of commands you typed.\n\
3839 You can supply a command number to start with, or a `+' to start after\n\
3840 the previous command number shown.",
3843 add_cmd ("version", no_class
, show_version
,
3844 "Show what version of GDB this is.", &showlist
);
3846 add_com ("while", class_support
, while_command
,
3847 "Execute nested commands WHILE the conditional expression is non zero.\n\
3848 The conditional expression must follow the word `while' and must in turn be\n\
3849 followed by a new line. The nested commands must be entered one per line,\n\
3850 and should be terminated by the word `end'.");
3852 add_com ("if", class_support
, if_command
,
3853 "Execute nested commands once IF the conditional expression is non zero.\n\
3854 The conditional expression must follow the word `if' and must in turn be\n\
3855 followed by a new line. The nested commands must be entered one per line,\n\
3856 and should be terminated by the word 'else' or `end'. If an else clause\n\
3857 is used, the same rules apply to its nested commands as to the first ones.");
3859 /* If target is open when baud changes, it doesn't take effect until the
3860 next open (I think, not sure). */
3861 add_show_from_set (add_set_cmd ("remotebaud", no_class
,
3862 var_zinteger
, (char *)&baud_rate
,
3863 "Set baud rate for remote serial I/O.\n\
3864 This value is used to set the speed of the serial port when debugging\n\
3865 using remote targets.", &setlist
),
3869 add_set_cmd ("remotedebug", no_class
, var_zinteger
, (char *)&remote_debug
,
3870 "Set debugging of remote protocol.\n\
3871 When enabled, each packet sent or received with the remote target\n\
3872 is displayed.", &setlist
),
3876 add_set_cmd ("remotetimeout", no_class
, var_integer
, (char *)&remote_timeout
,
3877 "Set timeout limit to wait for target to respond.\n\
3878 This value is used to set the time limit for gdb to wait for a response\n\
3879 from he target.", &setlist
),
3882 c
= add_set_cmd ("annotate", class_obscure
, var_zinteger
,
3883 (char *)&annotation_level
, "Set annotation_level.\n\
3884 0 == normal; 1 == fullname (for use when running under emacs)\n\
3885 2 == output annotated suitably for use by programs that control GDB.",
3887 c
= add_show_from_set (c
, &showlist
);