1 /* Top level `main' program for GDB, the GNU debugger.
2 Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992
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., 675 Mass Ave, Cambridge, MA 02139, USA. */
23 #include "call-cmds.h"
28 #include "breakpoint.h"
30 #include "expression.h"
32 #include "terminal.h" /* For job_control. */
36 /* readline include files */
40 /* readline defines this. */
44 #include <sys/types.h>
53 #include <sys/param.h>
57 #ifdef SET_STACK_LIMIT_HUGE
59 #include <sys/resource.h>
61 int original_stack_limit
;
64 /* Prototypes for local functions */
67 symbol_completion_function
PARAMS ((char *, int));
70 command_loop
PARAMS ((void));
73 command_loop_marker
PARAMS ((int));
76 print_gdb_version
PARAMS ((GDB_FILE
*));
79 quit_command
PARAMS ((char *, int));
82 init_main
PARAMS ((void));
85 init_history
PARAMS ((void));
88 init_cmd_lists
PARAMS ((void));
91 float_handler
PARAMS ((int));
94 source_command
PARAMS ((char *, int));
96 static void cd_command
PARAMS ((char *, int));
99 print_gnu_advertisement
PARAMS ((void));
102 init_signals
PARAMS ((void));
105 read_command_file
PARAMS ((FILE *));
108 set_verbose
PARAMS ((char *, int, struct cmd_list_element
*));
111 show_history
PARAMS ((char *, int));
114 set_history
PARAMS ((char *, int));
117 set_history_size_command
PARAMS ((char *, int, struct cmd_list_element
*));
120 show_commands
PARAMS ((char *, int));
123 echo_command
PARAMS ((char *, int));
126 pwd_command
PARAMS ((char *, int));
129 show_version
PARAMS ((char *, int));
132 document_command
PARAMS ((char *, int));
135 define_command
PARAMS ((char *, int));
138 validate_comname
PARAMS ((char *));
141 help_command
PARAMS ((char *, int));
144 show_command
PARAMS ((char *, int));
147 info_command
PARAMS ((char *, int));
150 do_nothing
PARAMS ((int));
153 quit_cover
PARAMS ((char *));
156 disconnect
PARAMS ((int));
159 source_cleanup
PARAMS ((FILE *));
161 /* If this definition isn't overridden by the header files, assume
162 that isatty and fileno exist on this system. */
164 #define ISATTY(FP) (isatty (fileno (FP)))
167 /* Initialization file name for gdb. This is overridden in some configs. */
169 #ifndef GDBINIT_FILENAME
170 #define GDBINIT_FILENAME ".gdbinit"
172 static char gdbinit
[] = GDBINIT_FILENAME
;
173 static int inhibit_gdbinit
= 0;
175 #define ALL_CLEANUPS ((struct cleanup *)0)
177 /* Version number of GDB, as a string. */
179 extern char *version
;
181 /* Canonical host name as a string. */
183 extern char *host_canonical
;
185 /* Canonical target name as a string. */
187 extern char *target_canonical
;
189 extern char lang_frame_mismatch_warn
[]; /* language.c */
191 /* Flag for whether we want all the "from_tty" gubbish printed. */
193 int caution
= 1; /* Default is yes, sigh. */
196 * Define all cmd_list_element's
199 /* Chain containing all defined commands. */
201 struct cmd_list_element
*cmdlist
;
203 /* Chain containing all defined info subcommands. */
205 struct cmd_list_element
*infolist
;
207 /* Chain containing all defined enable subcommands. */
209 struct cmd_list_element
*enablelist
;
211 /* Chain containing all defined disable subcommands. */
213 struct cmd_list_element
*disablelist
;
215 /* Chain containing all defined delete subcommands. */
217 struct cmd_list_element
*deletelist
;
219 /* Chain containing all defined "enable breakpoint" subcommands. */
221 struct cmd_list_element
*enablebreaklist
;
223 /* Chain containing all defined set subcommands */
225 struct cmd_list_element
*setlist
;
227 /* Chain containing all defined unset subcommands */
229 struct cmd_list_element
*unsetlist
;
231 /* Chain containing all defined show subcommands. */
233 struct cmd_list_element
*showlist
;
235 /* Chain containing all defined \"set history\". */
237 struct cmd_list_element
*sethistlist
;
239 /* Chain containing all defined \"show history\". */
241 struct cmd_list_element
*showhistlist
;
243 /* Chain containing all defined \"unset history\". */
245 struct cmd_list_element
*unsethistlist
;
247 /* Chain containing all defined maintenance subcommands. */
250 struct cmd_list_element
*maintenancelist
;
253 /* Chain containing all defined "maintenance info" subcommands. */
256 struct cmd_list_element
*maintenanceinfolist
;
259 /* Chain containing all defined "maintenance print" subcommands. */
262 struct cmd_list_element
*maintenanceprintlist
;
265 struct cmd_list_element
*setprintlist
;
267 struct cmd_list_element
*showprintlist
;
269 struct cmd_list_element
*setchecklist
;
271 struct cmd_list_element
*showchecklist
;
273 /* stdio stream that command input is being read from. Set to stdin normally.
274 Set by source_command to the file we are sourcing. Set to NULL if we are
275 executing a user-defined command. */
279 /* Current working directory. */
281 char *current_directory
;
283 /* The directory name is actually stored here (usually). */
284 static char dirbuf
[1024];
286 /* Function to call before reading a command, if nonzero.
287 The function receives two args: an input stream,
288 and a prompt string. */
290 void (*window_hook
) PARAMS ((FILE *, char *));
292 extern int mapped_symbol_files
;
293 extern int readnow_symbol_files
;
298 /* gdb prints this when reading a command interactively */
301 /* Buffer used for reading command lines, and the size
302 allocated for it so far. */
307 /* Baud rate specified for talking to serial target systems. Default
308 is left as -1, so targets can choose their own defaults. */
312 /* Non-zero tells remote* modules to output debugging info. */
314 int remote_debug
= 0;
316 /* Signal to catch ^Z typed while reading a command: SIGTSTP or SIGCONT. */
320 #define STOP_SIGNAL SIGTSTP
321 static void stop_sig
PARAMS ((int));
325 /* Some System V have job control but not sigsetmask(). */
326 #if !defined (HAVE_SIGSETMASK)
327 #define HAVE_SIGSETMASK !defined (USG)
330 #if 0 == (HAVE_SIGSETMASK)
331 #define sigsetmask(n)
334 /* Where to go for return_to_top_level (RETURN_ERROR). */
335 static jmp_buf error_return
;
336 /* Where to go for return_to_top_level (RETURN_QUIT). */
337 static jmp_buf quit_return
;
339 /* Temporary variable for SET_TOP_LEVEL. */
340 static int top_level_val
;
342 /* Do a setjmp on error_return and quit_return. catch_errors is
343 generally a cleaner way to do this, but main() would look pretty
344 ugly if it had to use catch_errors each time. */
346 #define SET_TOP_LEVEL() \
347 (((top_level_val = setjmp (error_return)) \
348 ? (PTR) 0 : (PTR) memcpy (quit_return, error_return, sizeof (jmp_buf))) \
351 /* Return for reason REASON. This generally gets back to the command
352 loop, but can be caught via catch_errors. */
355 return_to_top_level (reason
)
356 enum return_reason reason
;
361 /* Perhaps it would be cleaner to do this via the cleanup chain (not sure
362 I can think of a reason why that is vital, though). */
363 bpstat_clear_actions(stop_bpstat
); /* Clear queued breakpoint commands */
365 disable_current_display ();
366 do_cleanups (ALL_CLEANUPS
);
367 (NORETURN
void) longjmp
368 (reason
== RETURN_ERROR
? error_return
: quit_return
, 1);
371 /* Call FUNC with arg ARGS, catching any errors. If there is no
372 error, return the value returned by FUNC. If there is an error,
373 print ERRSTRING, print the specific error message, then return
376 Must not be called with immediate_quit in effect (bad things might
377 happen, say we got a signal in the middle of a memcpy to quit_return).
378 This is an OK restriction; with very few exceptions immediate_quit can
379 be replaced by judicious use of QUIT.
381 MASK specifies what to catch; it is normally set to
382 RETURN_MASK_ALL, if for no other reason than that the code which
383 calls catch_errors might not be set up to deal with a quit which
384 isn't caught. But if the code can deal with it, it generally
385 should be RETURN_MASK_ERROR, unless for some reason it is more
386 useful to abort only the portion of the operation inside the
387 catch_errors. Note that quit should return to the command line
388 fairly quickly, even if some further processing is being done. */
391 catch_errors (func
, args
, errstring
, mask
)
392 int (*func
) PARAMS ((char *));
401 struct cleanup
*saved_cleanup_chain
;
402 char *saved_error_pre_print
;
404 saved_cleanup_chain
= save_cleanups ();
405 saved_error_pre_print
= error_pre_print
;
407 if (mask
& RETURN_MASK_ERROR
)
408 memcpy ((char *)saved_error
, (char *)error_return
, sizeof (jmp_buf));
409 if (mask
& RETURN_MASK_QUIT
)
410 memcpy (saved_quit
, quit_return
, sizeof (jmp_buf));
411 error_pre_print
= errstring
;
413 if (setjmp (tmp_jmp
) == 0)
415 if (mask
& RETURN_MASK_ERROR
)
416 memcpy (error_return
, tmp_jmp
, sizeof (jmp_buf));
417 if (mask
& RETURN_MASK_QUIT
)
418 memcpy (quit_return
, tmp_jmp
, sizeof (jmp_buf));
419 val
= (*func
) (args
);
424 restore_cleanups (saved_cleanup_chain
);
426 error_pre_print
= saved_error_pre_print
;
427 if (mask
& RETURN_MASK_ERROR
)
428 memcpy (error_return
, saved_error
, sizeof (jmp_buf));
429 if (mask
& RETURN_MASK_QUIT
)
430 memcpy (quit_return
, saved_quit
, sizeof (jmp_buf));
434 /* Handler for SIGHUP. */
440 catch_errors (quit_cover
, NULL
,
441 "Could not kill the program being debugged", RETURN_MASK_ALL
);
442 signal (SIGHUP
, SIG_DFL
);
443 kill (getpid (), SIGHUP
);
446 /* Just a little helper function for disconnect(). */
452 caution
= 0; /* Throw caution to the wind -- we're exiting.
453 This prevents asking the user dumb questions. */
454 quit_command((char *)0, 0);
458 /* Line number we are currently in in a file which is being sourced. */
459 static int source_line_number
;
461 /* Name of the file we are sourcing. */
462 static char *source_file_name
;
464 /* Buffer containing the error_pre_print used by the source stuff.
466 static char *source_error
;
467 static int source_error_allocated
;
469 /* Something to glom on to the start of error_pre_print if source_file_name
471 static char *source_pre_error
;
473 /* Clean up on error during a "source" command (or execution of a
474 user-defined command). */
477 source_cleanup (stream
)
480 /* Restore the previous input stream. */
484 /* Read commands from STREAM. */
486 read_command_file (stream
)
489 struct cleanup
*cleanups
;
491 cleanups
= make_cleanup (source_cleanup
, instream
);
494 do_cleanups (cleanups
);
503 static int quiet
= 0;
504 static int batch
= 0;
506 /* Pointers to various arguments from command line. */
508 char *execarg
= NULL
;
509 char *corearg
= NULL
;
513 /* These are static so that we can take their address in an initializer. */
514 static int print_help
;
515 static int print_version
;
517 /* Pointers to all arguments of --command option. */
519 /* Allocated size of cmdarg. */
521 /* Number of elements of cmdarg used. */
524 /* Indices of all arguments of --directory option. */
526 /* Allocated size. */
528 /* Number of elements used. */
531 struct stat homebuf
, cwdbuf
;
532 char *homedir
, *homeinit
;
536 /* This needs to happen before the first use of malloc. */
537 init_malloc ((PTR
) NULL
);
539 #if defined (ALIGN_STACK_ON_STARTUP)
540 i
= (int) &count
& 0x3;
545 /* If error() is called from initialization code, just exit */
546 if (SET_TOP_LEVEL ()) {
551 cmdarg
= (char **) xmalloc (cmdsize
* sizeof (*cmdarg
));
554 dirarg
= (char **) xmalloc (dirsize
* sizeof (*dirarg
));
558 line
= (char *) xmalloc (linesize
);
559 line
[0] = '\0'; /* Terminate saved (now empty) cmd line */
562 getcwd (dirbuf
, sizeof (dirbuf
));
563 current_directory
= dirbuf
;
565 #ifdef SET_STACK_LIMIT_HUGE
569 /* Set the stack limit huge so that alloca (particularly stringtab
570 * in dbxread.c) does not fail. */
571 getrlimit (RLIMIT_STACK
, &rlim
);
572 original_stack_limit
= rlim
.rlim_cur
;
573 rlim
.rlim_cur
= rlim
.rlim_max
;
574 setrlimit (RLIMIT_STACK
, &rlim
);
576 #endif /* SET_STACK_LIMIT_HUGE */
578 /* Parse arguments and options. */
581 /* When var field is 0, use flag field to record the equivalent
582 short option (or arbitrary numbers starting at 10 for those
583 with no equivalent). */
584 static struct option long_options
[] =
586 {"readnow", no_argument
, &readnow_symbol_files
, 1},
587 {"r", no_argument
, &readnow_symbol_files
, 1},
588 {"mapped", no_argument
, &mapped_symbol_files
, 1},
589 {"m", no_argument
, &mapped_symbol_files
, 1},
590 {"quiet", no_argument
, &quiet
, 1},
591 {"q", no_argument
, &quiet
, 1},
592 {"silent", no_argument
, &quiet
, 1},
593 {"nx", no_argument
, &inhibit_gdbinit
, 1},
594 {"n", no_argument
, &inhibit_gdbinit
, 1},
595 {"batch", no_argument
, &batch
, 1},
596 {"epoch", no_argument
, &epoch_interface
, 1},
597 {"fullname", no_argument
, &frame_file_full_name
, 1},
598 {"f", no_argument
, &frame_file_full_name
, 1},
599 {"help", no_argument
, &print_help
, 1},
600 {"se", required_argument
, 0, 10},
601 {"symbols", required_argument
, 0, 's'},
602 {"s", required_argument
, 0, 's'},
603 {"exec", required_argument
, 0, 'e'},
604 {"e", required_argument
, 0, 'e'},
605 {"core", required_argument
, 0, 'c'},
606 {"c", required_argument
, 0, 'c'},
607 {"command", required_argument
, 0, 'x'},
608 {"version", no_argument
, &print_version
, 1},
609 {"x", required_argument
, 0, 'x'},
610 {"directory", required_argument
, 0, 'd'},
611 {"cd", required_argument
, 0, 11},
612 {"tty", required_argument
, 0, 't'},
613 {"baud", required_argument
, 0, 'b'},
614 {"b", required_argument
, 0, 'b'},
615 /* Allow machine descriptions to add more options... */
616 #ifdef ADDITIONAL_OPTIONS
619 {0, no_argument
, 0, 0},
626 c
= getopt_long_only (argc
, argv
, "",
627 long_options
, &option_index
);
631 /* Long option that takes an argument. */
632 if (c
== 0 && long_options
[option_index
].flag
== 0)
633 c
= long_options
[option_index
].val
;
638 /* Long option that just sets a flag. */
657 cmdarg
[ncmd
++] = optarg
;
661 cmdarg
= (char **) xrealloc ((char *)cmdarg
,
662 cmdsize
* sizeof (*cmdarg
));
666 dirarg
[ndir
++] = optarg
;
670 dirarg
= (char **) xrealloc ((char *)dirarg
,
671 dirsize
* sizeof (*dirarg
));
685 i
= strtol (optarg
, &p
, 0);
686 if (i
== 0 && p
== optarg
)
687 warning ("Could not set baud rate to `%s'.\n", optarg
);
693 #ifdef ADDITIONAL_OPTION_CASES
694 ADDITIONAL_OPTION_CASES
697 fprintf_unfiltered (gdb_stderr
,
698 "Use `%s --help' for a complete list of options.\n",
704 /* OK, that's all the options. The other arguments are filenames. */
706 for (; optind
< argc
; optind
++)
710 symarg
= argv
[optind
];
711 execarg
= argv
[optind
];
714 corearg
= argv
[optind
];
717 fprintf_unfiltered (gdb_stderr
,
718 "Excess command line arguments ignored. (%s%s)\n",
719 argv
[optind
], (optind
== argc
- 1) ? "" : " ...");
726 /* Run the init function of each source file */
728 init_cmd_lists (); /* This needs to be done first */
729 initialize_all_files ();
730 init_main (); /* But that omits this file! Do it now */
733 /* Do these (and anything which might call wrap_here or *_filtered)
734 after initialize_all_files. */
737 print_gdb_version (gdb_stdout
);
739 printf_filtered ("\n");
745 /* --version is intentionally not documented here, because we
746 are printing the version here, and the help is long enough
749 print_gdb_version (gdb_stdout
);
750 /* Make sure the output gets printed. */
752 printf_filtered ("\n");
754 /* But don't use *_filtered here. We don't want to prompt for continue
755 no matter how small the screen or how much we're going to print. */
757 This is the GNU debugger. Usage:\n\
758 gdb [options] [executable-file [core-file or process-id]]\n\
760 --help Print this message.\n\
761 --quiet Do not print version number on startup.\n\
762 --fullname Output information used by emacs-GDB interface.\n\
763 --epoch Output information used by epoch emacs-GDB interface.\n\
764 --batch Exit after processing options.\n\
765 --nx Do not read .gdbinit file.\n\
766 --tty=TTY Use TTY for input/output by the program being debugged.\n\
767 --cd=DIR Change current directory to DIR.\n\
768 --directory=DIR Search for source files in DIR.\n\
769 --command=FILE Execute GDB commands from FILE.\n\
770 --symbols=SYMFILE Read symbols from SYMFILE.\n\
771 --exec=EXECFILE Use EXECFILE as the executable.\n\
772 --se=FILE Use FILE as symbol file and executable file.\n\
773 --core=COREFILE Analyze the core dump COREFILE.\n\
774 -b BAUDRATE Set serial port baud rate used for remote debugging.\n\
775 --mapped Use mapped symbol files if supported on this system.\n\
776 --readnow Fully read symbol files on first access.\n\
778 #ifdef ADDITIONAL_OPTION_HELP
779 fputs_unfiltered (ADDITIONAL_OPTION_HELP
, gdb_stdout
);
781 fputs_unfiltered ("\n\
782 For more information, type \"help\" from within GDB, or consult the\n\
783 GDB manual (available as on-line info or a printed manual).\n", gdb_stdout
);
789 /* Print all the junk at the top, with trailing "..." if we are about
790 to read a symbol file (possibly slowly). */
791 print_gnu_advertisement ();
792 print_gdb_version (gdb_stdout
);
794 printf_filtered ("..");
796 gdb_flush (gdb_stdout
); /* Force to screen during slow operations */
799 error_pre_print
= "\n\n";
800 /* We may get more than one warning, don't double space all of them... */
801 warning_pre_print
= "\nwarning: ";
803 /* We need a default language for parsing expressions, so simple things like
804 "set width 0" won't fail if no language is explicitly set in a config file
805 or implicitly set by reading an executable during startup. */
806 set_language (language_c
);
807 expected_language
= current_language
; /* don't warn about the change. */
809 /* Read and execute $HOME/.gdbinit file, if it exists. This is done
810 *before* all the command line arguments are processed; it sets
811 global parameters, which are independent of what file you are
812 debugging or what directory you are in. */
813 homedir
= getenv ("HOME");
816 homeinit
= (char *) alloca (strlen (getenv ("HOME")) +
817 strlen (gdbinit
) + 10);
818 strcpy (homeinit
, getenv ("HOME"));
819 strcat (homeinit
, "/");
820 strcat (homeinit
, gdbinit
);
821 if (!inhibit_gdbinit
&& access (homeinit
, R_OK
) == 0)
823 if (!SET_TOP_LEVEL ())
824 source_command (homeinit
, 0);
826 do_cleanups (ALL_CLEANUPS
);
828 /* Do stats; no need to do them elsewhere since we'll only
829 need them if homedir is set. Make sure that they are
830 zero in case one of them fails (this guarantees that they
831 won't match if either exists). */
833 memset (&homebuf
, 0, sizeof (struct stat
));
834 memset (&cwdbuf
, 0, sizeof (struct stat
));
836 stat (homeinit
, &homebuf
);
837 stat (gdbinit
, &cwdbuf
); /* We'll only need this if
841 /* Now perform all the actions indicated by the arguments. */
844 if (!SET_TOP_LEVEL ())
846 cd_command (cdarg
, 0);
850 do_cleanups (ALL_CLEANUPS
);
852 for (i
= 0; i
< ndir
; i
++)
853 if (!SET_TOP_LEVEL ())
854 directory_command (dirarg
[i
], 0);
856 do_cleanups (ALL_CLEANUPS
);
860 && STREQ (execarg
, symarg
))
862 /* The exec file and the symbol-file are the same. If we can't open
863 it, better only print one error message. */
864 if (!SET_TOP_LEVEL ())
866 exec_file_command (execarg
, !batch
);
867 symbol_file_command (symarg
, 0);
873 if (!SET_TOP_LEVEL ())
874 exec_file_command (execarg
, !batch
);
876 if (!SET_TOP_LEVEL ())
877 symbol_file_command (symarg
, 0);
879 do_cleanups (ALL_CLEANUPS
);
881 /* After the symbol file has been read, print a newline to get us
882 beyond the copyright line... But errors should still set off
883 the error message with a (single) blank line. */
885 printf_filtered ("\n");
886 error_pre_print
= "\n";
887 warning_pre_print
= "\nwarning: ";
890 if (!SET_TOP_LEVEL ())
891 core_file_command (corearg
, !batch
);
892 else if (isdigit (corearg
[0]) && !SET_TOP_LEVEL ())
893 attach_command (corearg
, !batch
);
894 do_cleanups (ALL_CLEANUPS
);
897 if (!SET_TOP_LEVEL ())
898 tty_command (ttyarg
, !batch
);
899 do_cleanups (ALL_CLEANUPS
);
901 #ifdef ADDITIONAL_OPTION_HANDLER
902 ADDITIONAL_OPTION_HANDLER
;
905 /* Error messages should no longer be distinguished with extra output. */
907 warning_pre_print
= "warning: ";
909 /* Read the .gdbinit file in the current directory, *if* it isn't
910 the same as the $HOME/.gdbinit file (it should exist, also). */
913 || memcmp ((char *) &homebuf
, (char *) &cwdbuf
, sizeof (struct stat
)))
914 if (!inhibit_gdbinit
&& access (gdbinit
, R_OK
) == 0)
916 if (!SET_TOP_LEVEL ())
917 source_command (gdbinit
, 0);
919 do_cleanups (ALL_CLEANUPS
);
921 for (i
= 0; i
< ncmd
; i
++)
923 if (!SET_TOP_LEVEL ())
925 if (cmdarg
[i
][0] == '-' && cmdarg
[i
][1] == '\0')
926 read_command_file (stdin
);
928 source_command (cmdarg
[i
], !batch
);
929 do_cleanups (ALL_CLEANUPS
);
934 /* Read in the old history after all the command files have been read. */
939 /* We have hit the end of the batch file. */
943 /* Do any host- or target-specific hacks. This is used for i960 targets
944 to force the user to set a nindy target and spec its parameters. */
946 #ifdef BEFORE_MAIN_LOOP_HOOK
947 BEFORE_MAIN_LOOP_HOOK
;
950 /* The command loop. */
954 if (!SET_TOP_LEVEL ())
956 do_cleanups (ALL_CLEANUPS
); /* Do complete cleanup */
958 quit_command ((char *)0, instream
== stdin
);
961 /* No exit -- exit is through quit_command. */
965 execute_user_command (c
, args
)
966 struct cmd_list_element
*c
;
969 register struct command_line
*cmdlines
;
970 struct cleanup
*old_chain
;
973 error ("User-defined commands cannot take arguments.");
975 cmdlines
= c
->user_commands
;
980 /* Set the instream to 0, indicating execution of a
981 user-defined function. */
982 old_chain
= make_cleanup (source_cleanup
, instream
);
983 instream
= (FILE *) 0;
986 execute_command (cmdlines
->line
, 0);
987 cmdlines
= cmdlines
->next
;
989 do_cleanups (old_chain
);
992 /* Execute the line P as a command.
993 Pass FROM_TTY as second argument to the defining function. */
996 execute_command (p
, from_tty
)
1000 register struct cmd_list_element
*c
;
1001 register enum language flang
;
1002 static int warned
= 0;
1006 /* This can happen when command_line_input hits end of file. */
1010 while (*p
== ' ' || *p
== '\t') p
++;
1015 c
= lookup_cmd (&p
, cmdlist
, "", 0, 1);
1016 /* Pass null arg rather than an empty one. */
1019 /* If this command has been hooked, run the hook first. */
1021 execute_user_command (c
->hook
, (char *)0);
1023 if (c
->class == class_user
)
1024 execute_user_command (c
, arg
);
1025 else if (c
->type
== set_cmd
|| c
->type
== show_cmd
)
1026 do_setshow_command (arg
, from_tty
& caution
, c
);
1027 else if (c
->function
.cfunc
== NO_FUNCTION
)
1028 error ("That is not a command, just a help topic.");
1030 (*c
->function
.cfunc
) (arg
, from_tty
& caution
);
1033 /* Tell the user if the language has changed (except first time). */
1034 if (current_language
!= expected_language
)
1036 if (language_mode
== language_mode_auto
) {
1037 language_info (1); /* Print what changed. */
1042 /* Warn the user if the working language does not match the
1043 language of the current frame. Only warn the user if we are
1044 actually running the program, i.e. there is a stack. */
1045 /* FIXME: This should be cacheing the frame and only running when
1046 the frame changes. */
1047 if (target_has_stack
)
1049 flang
= get_frame_language ();
1051 && flang
!= language_unknown
1052 && flang
!= current_language
->la_language
)
1054 printf_filtered ("%s\n", lang_frame_mismatch_warn
);
1062 command_loop_marker (foo
)
1067 /* Read commands from `instream' and execute them
1068 until end of file or error reading instream. */
1072 struct cleanup
*old_chain
;
1074 int stdin_is_tty
= ISATTY (stdin
);
1076 while (!feof (instream
))
1078 if (window_hook
&& instream
== stdin
)
1079 (*window_hook
) (instream
, prompt
);
1082 if (instream
== stdin
&& stdin_is_tty
)
1083 reinitialize_more_filter ();
1084 old_chain
= make_cleanup (command_loop_marker
, 0);
1085 command
= command_line_input (instream
== stdin
? prompt
: (char *) NULL
,
1089 execute_command (command
, instream
== stdin
);
1090 /* Do any commands attached to breakpoint we stopped at. */
1091 bpstat_do_actions (&stop_bpstat
);
1092 do_cleanups (old_chain
);
1096 /* Commands call this if they do not want to be repeated by null lines. */
1101 /* If we aren't reading from standard input, we are saving the last
1102 thing read from stdin in line and don't want to delete it. Null lines
1103 won't repeat here in any case. */
1104 if (instream
== stdin
)
1108 /* Read a line from the stream "instream" without command line editing.
1110 It prints PRROMPT once at the start.
1111 Action is compatible with "readline", e.g. space for the result is
1112 malloc'd and should be freed by the caller.
1114 A NULL return means end of file. */
1116 gdb_readline (prrompt
)
1121 int input_index
= 0;
1122 int result_size
= 80;
1126 /* Don't use a _filtered function here. It causes the assumed
1127 character position to be off, since the newline we read from
1128 the user is not accounted for. */
1129 fputs_unfiltered (prrompt
, gdb_stdout
);
1130 gdb_flush (gdb_stdout
);
1133 result
= (char *) xmalloc (result_size
);
1137 /* Read from stdin if we are executing a user defined command.
1138 This is the right thing for prompt_for_continue, at least. */
1139 c
= fgetc (instream
? instream
: stdin
);
1143 if (input_index
> 0)
1144 /* The last line does not end with a newline. Return it, and
1145 if we are called again fgetc will still return EOF and
1146 we'll return NULL then. */
1155 result
[input_index
++] = c
;
1156 while (input_index
>= result_size
)
1159 result
= (char *) xrealloc (result
, result_size
);
1163 result
[input_index
++] = '\0';
1167 /* Variables which control command line editing and history
1168 substitution. These variables are given default values at the end
1170 static int command_editing_p
;
1171 static int history_expansion_p
;
1172 static int write_history_p
;
1173 static int history_size
;
1174 static char *history_filename
;
1176 /* readline uses the word breaks for two things:
1177 (1) In figuring out where to point the TEXT parameter to the
1178 rl_completion_entry_function. Since we don't use TEXT for much,
1179 it doesn't matter a lot what the word breaks are for this purpose, but
1180 it does affect how much stuff M-? lists.
1181 (2) If one of the matches contains a word break character, readline
1182 will quote it. That's why we switch between
1183 gdb_completer_word_break_characters and
1184 gdb_completer_command_word_break_characters. I'm not sure when
1185 we need this behavior (perhaps for funky characters in C++ symbols?). */
1187 /* Variables which are necessary for fancy command line editing. */
1188 char *gdb_completer_word_break_characters
=
1189 " \t\n!@#$%^&*()+=|~`}{[]\"';:?/>.<,-";
1191 /* When completing on command names, we remove '-' from the list of
1192 word break characters, since we use it in command names. If the
1193 readline library sees one in any of the current completion strings,
1194 it thinks that the string needs to be quoted and automatically supplies
1196 char *gdb_completer_command_word_break_characters
=
1197 " \t\n!@#$%^&*()+=|~`}{[]\"';:?/>.<,";
1199 /* Characters that can be used to quote completion strings. Note that we
1200 can't include '"' because the gdb C parser treats such quoted sequences
1202 char *gdb_completer_quote_characters
=
1205 /* Functions that are used as part of the fancy command line editing. */
1207 /* This can be used for functions which don't want to complete on symbols
1208 but don't want to complete on anything else either. */
1211 noop_completer (text
, prefix
)
1218 /* Complete on filenames. */
1220 filename_completer (text
, word
)
1224 /* From readline. */
1225 extern char *filename_completion_function ();
1226 int subsequent_name
;
1228 int return_val_used
;
1229 int return_val_alloced
;
1231 return_val_used
= 0;
1232 /* Small for testing. */
1233 return_val_alloced
= 1;
1234 return_val
= (char **) xmalloc (return_val_alloced
* sizeof (char *));
1236 subsequent_name
= 0;
1240 p
= filename_completion_function (text
, subsequent_name
);
1241 if (return_val_used
>= return_val_alloced
)
1243 return_val_alloced
*= 2;
1245 (char **) xrealloc (return_val
,
1246 return_val_alloced
* sizeof (char *));
1250 return_val
[return_val_used
++] = p
;
1253 /* Like emacs, don't complete on old versions. Especially useful
1254 in the "source" command. */
1255 if (p
[strlen (p
) - 1] == '~')
1261 /* Return exactly p. */
1262 return_val
[return_val_used
++] = p
;
1263 else if (word
> text
)
1265 /* Return some portion of p. */
1266 q
= xmalloc (strlen (p
) + 5);
1267 strcpy (q
, p
+ (word
- text
));
1268 return_val
[return_val_used
++] = q
;
1273 /* Return some of TEXT plus p. */
1274 q
= xmalloc (strlen (p
) + (text
- word
) + 5);
1275 strncpy (q
, word
, text
- word
);
1276 q
[text
- word
] = '\0';
1278 return_val
[return_val_used
++] = q
;
1282 subsequent_name
= 1;
1285 /* There is no way to do this just long enough to affect quote inserting
1286 without also affecting the next completion. This should be fixed in
1288 /* Insure that readline does the right thing
1289 with respect to inserting quotes. */
1290 rl_completer_word_break_characters
= "";
1295 /* Here are some useful test cases for completion. FIXME: These should
1296 be put in the test suite. They should be tested with both M-? and TAB.
1298 "show output-" "radix"
1299 "show output" "-radix"
1300 "p" ambiguous (commands starting with p--path, print, printf, etc.)
1301 "p " ambiguous (all symbols)
1302 "info t foo" no completions
1303 "info t " no completions
1304 "info t" ambiguous ("info target", "info terminal", etc.)
1305 "info ajksdlfk" no completions
1306 "info ajksdlfk " no completions
1308 "info " ambiguous (all info commands)
1309 "p \"a" no completions (string constant)
1310 "p 'a" ambiguous (all symbols starting with a)
1311 "p b-a" ambiguous (all symbols starting with a)
1312 "p b-" ambiguous (all symbols)
1313 "file Make" "file" (word break hard to screw up here)
1314 "file ../gdb.stabs/wi" "erd" (needs to not break word at slash)
1317 /* Generate completions one by one for the completer. Each time we are
1318 called return another potential completion to the caller. The function
1319 is misnamed; it just completes on commands or passes the buck to the
1320 command's completer function; the stuff specific to symbol completion
1321 is in make_symbol_completion_list.
1323 TEXT is readline's idea of the "word" we are looking at; we don't really
1324 like readline's ideas about word breaking so we ignore it.
1326 MATCHES is the number of matches that have currently been collected from
1327 calling this completion function. When zero, then we need to initialize,
1328 otherwise the initialization has already taken place and we can just
1329 return the next potential completion string.
1331 Returns NULL if there are no more completions, else a pointer to a string
1332 which is a possible completion.
1334 RL_LINE_BUFFER is available to be looked at; it contains the entire text
1335 of the line. RL_POINT is the offset in that line of the cursor. You
1336 should pretend that the line ends at RL_POINT. */
1339 symbol_completion_function (text
, matches
)
1343 static char **list
= (char **)NULL
; /* Cache of completions */
1344 static int index
; /* Next cached completion */
1345 char *output
= NULL
;
1346 char *tmp_command
, *p
;
1347 /* Pointer within tmp_command which corresponds to text. */
1349 struct cmd_list_element
*c
, *result_list
;
1350 extern char *rl_line_buffer
;
1351 extern int rl_point
;
1355 /* The caller is beginning to accumulate a new set of completions, so
1356 we need to find all of them now, and cache them for returning one at
1357 a time on future calls. */
1361 /* Free the storage used by LIST, but not by the strings inside.
1362 This is because rl_complete_internal () frees the strings. */
1368 /* Choose the default set of word break characters to break completions.
1369 If we later find out that we are doing completions on command strings
1370 (as opposed to strings supplied by the individual command completer
1371 functions, which can be any string) then we will switch to the
1372 special word break set for command strings, which leaves out the
1373 '-' character used in some commands. */
1375 rl_completer_word_break_characters
=
1376 gdb_completer_word_break_characters
;
1378 /* Decide whether to complete on a list of gdb commands or on symbols. */
1379 tmp_command
= (char *) alloca (rl_point
+ 1);
1382 strncpy (tmp_command
, rl_line_buffer
, rl_point
);
1383 tmp_command
[rl_point
] = '\0';
1384 /* Since text always contains some number of characters leading up
1385 to rl_point, we can find the equivalent position in tmp_command
1386 by subtracting that many characters from the end of tmp_command. */
1387 word
= tmp_command
+ rl_point
- strlen (text
);
1391 /* An empty line we want to consider ambiguous; that is, it
1392 could be any command. */
1393 c
= (struct cmd_list_element
*) -1;
1398 c
= lookup_cmd_1 (&p
, cmdlist
, &result_list
, 1);
1401 /* Move p up to the next interesting thing. */
1402 while (*p
== ' ' || *p
== '\t')
1409 /* It is an unrecognized command. So there are no
1410 possible completions. */
1413 else if (c
== (struct cmd_list_element
*) -1)
1417 /* lookup_cmd_1 advances p up to the first ambiguous thing, but
1418 doesn't advance over that thing itself. Do so now. */
1420 while (*q
&& (isalnum (*q
) || *q
== '-' || *q
== '_'))
1422 if (q
!= tmp_command
+ rl_point
)
1424 /* There is something beyond the ambiguous
1425 command, so there are no possible completions. For
1426 example, "info t " or "info t foo" does not complete
1427 to anything, because "info t" can be "info target" or
1433 /* We're trying to complete on the command which was ambiguous.
1434 This we can deal with. */
1437 list
= complete_on_cmdlist (*result_list
->prefixlist
, p
,
1442 list
= complete_on_cmdlist (cmdlist
, p
, word
);
1444 /* Insure that readline does the right thing with respect to
1445 inserting quotes. */
1446 rl_completer_word_break_characters
=
1447 gdb_completer_command_word_break_characters
;
1452 /* We've recognized a full command. */
1454 if (p
== tmp_command
+ rl_point
)
1456 /* There is no non-whitespace in the line beyond the command. */
1458 if (p
[-1] == ' ' || p
[-1] == '\t')
1460 /* The command is followed by whitespace; we need to complete
1461 on whatever comes after command. */
1464 /* It is a prefix command; what comes after it is
1465 a subcommand (e.g. "info "). */
1466 list
= complete_on_cmdlist (*c
->prefixlist
, p
, word
);
1468 /* Insure that readline does the right thing
1469 with respect to inserting quotes. */
1470 rl_completer_word_break_characters
=
1471 gdb_completer_command_word_break_characters
;
1475 /* It is a normal command; what comes after it is
1476 completed by the command's completer function. */
1477 list
= (*c
->completer
) (p
, word
);
1482 /* The command is not followed by whitespace; we need to
1483 complete on the command itself. e.g. "p" which is a
1484 command itself but also can complete to "print", "ptype"
1488 /* Find the command we are completing on. */
1490 while (q
> tmp_command
)
1492 if (isalnum (q
[-1]) || q
[-1] == '-' || q
[-1] == '_')
1498 list
= complete_on_cmdlist (result_list
, q
, word
);
1500 /* Insure that readline does the right thing
1501 with respect to inserting quotes. */
1502 rl_completer_word_break_characters
=
1503 gdb_completer_command_word_break_characters
;
1508 /* There is non-whitespace beyond the command. */
1510 if (c
->prefixlist
&& !c
->allow_unknown
)
1512 /* It is an unrecognized subcommand of a prefix command,
1513 e.g. "info adsfkdj". */
1518 /* It is a normal command. */
1519 list
= (*c
->completer
) (p
, word
);
1525 /* If we found a list of potential completions during initialization then
1526 dole them out one at a time. The vector of completions is NULL
1527 terminated, so after returning the last one, return NULL (and continue
1528 to do so) each time we are called after that, until a new list is
1533 output
= list
[index
];
1541 /* Can't do this because readline hasn't yet checked the word breaks
1542 for figuring out whether to insert a quote. */
1544 /* Make sure the word break characters are set back to normal for the
1545 next time that readline tries to complete something. */
1546 rl_completer_word_break_characters
=
1547 gdb_completer_word_break_characters
;
1553 /* Skip over a possibly quoted word (as defined by the quote characters
1554 and word break characters the completer uses). Returns pointer to the
1555 location after the "word". */
1561 char quote_char
= '\0';
1564 for (scan
= str
; *scan
!= '\0'; scan
++)
1566 if (quote_char
!= '\0')
1568 /* Ignore everything until the matching close quote char */
1569 if (*scan
== quote_char
)
1571 /* Found matching close quote. */
1576 else if (strchr (gdb_completer_quote_characters
, *scan
))
1578 /* Found start of a quoted string. */
1581 else if (strchr (gdb_completer_word_break_characters
, *scan
))
1595 #if STOP_SIGNAL == SIGTSTP
1596 signal (SIGTSTP
, SIG_DFL
);
1598 kill (getpid (), SIGTSTP
);
1599 signal (SIGTSTP
, stop_sig
);
1601 signal (STOP_SIGNAL
, stop_sig
);
1603 printf_unfiltered ("%s", prompt
);
1604 gdb_flush (gdb_stdout
);
1606 /* Forget about any previous command -- null line now will do nothing. */
1609 #endif /* STOP_SIGNAL */
1611 /* Initialize signal handlers. */
1621 signal (SIGINT
, request_quit
);
1623 /* If we initialize SIGQUIT to SIG_IGN, then the SIG_IGN will get
1624 passed to the inferior, which we don't want. It would be
1625 possible to do a "signal (SIGQUIT, SIG_DFL)" after we fork, but
1626 on BSD4.3 systems using vfork, that can affect the
1627 GDB process as well as the inferior (the signal handling tables
1628 might be in memory, shared between the two). Since we establish
1629 a handler for SIGQUIT, when we call exec it will set the signal
1630 to SIG_DFL for us. */
1631 signal (SIGQUIT
, do_nothing
);
1632 if (signal (SIGHUP
, do_nothing
) != SIG_IGN
)
1633 signal (SIGHUP
, disconnect
);
1634 signal (SIGFPE
, float_handler
);
1636 #if defined(SIGWINCH) && defined(SIGWINCH_HANDLER)
1637 signal (SIGWINCH
, SIGWINCH_HANDLER
);
1641 /* Read one line from the command input stream `instream'
1642 into the local static buffer `linebuffer' (whose current length
1644 The buffer is made bigger as necessary.
1645 Returns the address of the start of the line.
1647 NULL is returned for end of file.
1649 *If* the instream == stdin & stdin is a terminal, the line read
1650 is copied into the file line saver (global var char *line,
1651 length linesize) so that it can be duplicated.
1653 This routine either uses fancy command line editing or
1654 simple input as the user has requested. */
1657 command_line_input (prrompt
, repeat
)
1661 static char *linebuffer
= 0;
1662 static unsigned linelength
= 0;
1666 char *local_prompt
= prrompt
;
1671 if (linebuffer
== 0)
1674 linebuffer
= (char *) xmalloc (linelength
);
1679 /* Control-C quits instantly if typed while in this loop
1680 since it should not wait until the user types a newline. */
1684 signal (STOP_SIGNAL
, stop_sig
);
1689 /* Reports are that some Sys V's don't flush gdb_stdout/err on reads
1690 from stdin, when stdin/out are sockets rather than ttys. So we
1691 have to do it ourselves, to make emacs-gdb and xxgdb work.
1692 On other machines, doing this once per input should be a cheap nop. */
1693 gdb_flush (gdb_stdout
);
1694 gdb_flush (gdb_stderr
);
1696 if (source_file_name
!= NULL
)
1698 ++source_line_number
;
1699 sprintf (source_error
,
1700 "%s%s:%d: Error in sourced command file:\n",
1703 source_line_number
);
1704 error_pre_print
= source_error
;
1707 /* Don't use fancy stuff if not talking to stdin. */
1708 if (command_editing_p
&& instream
== stdin
1709 && ISATTY (instream
))
1710 rl
= readline (local_prompt
);
1712 rl
= gdb_readline (local_prompt
);
1714 if (!rl
|| rl
== (char *) EOF
)
1719 if (strlen(rl
) + 1 + (p
- linebuffer
) > linelength
)
1721 linelength
= strlen(rl
) + 1 + (p
- linebuffer
);
1722 nline
= (char *) xrealloc (linebuffer
, linelength
);
1723 p
+= nline
- linebuffer
;
1727 /* Copy line. Don't copy null at end. (Leaves line alone
1728 if this was just a newline) */
1732 free (rl
); /* Allocated in readline. */
1734 if (p
== linebuffer
|| *(p
- 1) != '\\')
1737 p
--; /* Put on top of '\'. */
1738 local_prompt
= (char *) 0;
1743 signal (STOP_SIGNAL
, SIG_DFL
);
1750 /* Do history expansion if that is wished. */
1751 if (history_expansion_p
&& instream
== stdin
1752 && ISATTY (instream
))
1754 char *history_value
;
1757 *p
= '\0'; /* Insert null now. */
1758 expanded
= history_expand (linebuffer
, &history_value
);
1761 /* Print the changes. */
1762 printf_unfiltered ("%s\n", history_value
);
1764 /* If there was an error, call this function again. */
1767 free (history_value
);
1768 return command_line_input (prrompt
, repeat
);
1770 if (strlen (history_value
) > linelength
)
1772 linelength
= strlen (history_value
) + 1;
1773 linebuffer
= (char *) xrealloc (linebuffer
, linelength
);
1775 strcpy (linebuffer
, history_value
);
1776 p
= linebuffer
+ strlen(linebuffer
);
1777 free (history_value
);
1781 /* If we just got an empty line, and that is supposed
1782 to repeat the previous command, return the value in the
1786 if (p
== linebuffer
)
1789 while (*p1
== ' ' || *p1
== '\t')
1797 /* Add line to history if appropriate. */
1798 if (instream
== stdin
1799 && ISATTY (stdin
) && *linebuffer
)
1800 add_history (linebuffer
);
1802 /* Note: lines consisting soley of comments are added to the command
1803 history. This is useful when you type a command, and then
1804 realize you don't want to execute it quite yet. You can comment
1805 out the command and then later fetch it from the value history
1806 and remove the '#'. The kill ring is probably better, but some
1807 people are in the habit of commenting things out. */
1809 while ((c
= *p1
++) != '\0')
1812 while ((c
= *p1
++) != '"')
1814 /* Make sure an escaped '"' doesn't make us think the string
1822 while ((c
= *p1
++) != '\'')
1824 /* Make sure an escaped '\'' doesn't make us think the string
1833 /* Found a comment. */
1839 /* Save into global buffer if appropriate. */
1842 if (linelength
> linesize
)
1844 line
= xrealloc (line
, linelength
);
1845 linesize
= linelength
;
1847 strcpy (line
, linebuffer
);
1854 /* Read lines from the input stream
1855 and accumulate them in a chain of struct command_line's
1856 which is then returned. */
1858 struct command_line
*
1859 read_command_lines ()
1861 struct command_line
*first
= 0;
1862 register struct command_line
*next
, *tail
= 0;
1863 register char *p
, *p1
;
1864 struct cleanup
*old_chain
= 0;
1869 p
= command_line_input ((char *) NULL
, instream
== stdin
);
1871 /* Treat end of file like "end". */
1874 /* Remove leading and trailing blanks. */
1875 while (*p
== ' ' || *p
== '\t') p
++;
1876 p1
= p
+ strlen (p
);
1877 while (p1
!= p
&& (p1
[-1] == ' ' || p1
[-1] == '\t')) p1
--;
1879 /* Is this "end"? */
1880 if (p1
- p
== 3 && !strncmp (p
, "end", 3))
1883 /* No => add this line to the chain of command lines. */
1884 next
= (struct command_line
*) xmalloc (sizeof (struct command_line
));
1885 next
->line
= savestring (p
, p1
- p
);
1893 /* We just read the first line.
1894 From now on, arrange to throw away the lines we have
1895 if we quit or get an error while inside this function. */
1897 old_chain
= make_cleanup (free_command_lines
, &first
);
1904 /* Now we are about to return the chain to our caller,
1905 so freeing it becomes his responsibility. */
1907 discard_cleanups (old_chain
);
1911 /* Free a chain of struct command_line's. */
1914 free_command_lines (lptr
)
1915 struct command_line
**lptr
;
1917 register struct command_line
*l
= *lptr
;
1918 register struct command_line
*next
;
1929 /* Add an element to the list of info subcommands. */
1932 add_info (name
, fun
, doc
)
1934 void (*fun
) PARAMS ((char *, int));
1937 add_cmd (name
, no_class
, fun
, doc
, &infolist
);
1940 /* Add an alias to the list of info subcommands. */
1943 add_info_alias (name
, oldname
, abbrev_flag
)
1948 add_alias_cmd (name
, oldname
, 0, abbrev_flag
, &infolist
);
1951 /* The "info" command is defined as a prefix, with allow_unknown = 0.
1952 Therefore, its own definition is called only for "info" with no args. */
1956 info_command (arg
, from_tty
)
1960 printf_unfiltered ("\"info\" must be followed by the name of an info command.\n");
1961 help_list (infolist
, "info ", -1, gdb_stdout
);
1964 /* The "show" command with no arguments shows all the settings. */
1968 show_command (arg
, from_tty
)
1972 cmd_show_list (showlist
, from_tty
, "");
1975 /* Add an element to the list of commands. */
1978 add_com (name
, class, fun
, doc
)
1980 enum command_class
class;
1981 void (*fun
) PARAMS ((char *, int));
1984 add_cmd (name
, class, fun
, doc
, &cmdlist
);
1987 /* Add an alias or abbreviation command to the list of commands. */
1990 add_com_alias (name
, oldname
, class, abbrev_flag
)
1993 enum command_class
class;
1996 add_alias_cmd (name
, oldname
, class, abbrev_flag
, &cmdlist
);
2003 error ("Argument required (%s).", why
);
2008 help_command (command
, from_tty
)
2010 int from_tty
; /* Ignored */
2012 help_cmd (command
, gdb_stdout
);
2016 validate_comname (comname
)
2022 error_no_arg ("name of command to define");
2027 if (!isalnum(*p
) && *p
!= '-')
2028 error ("Junk in argument list: \"%s\"", p
);
2033 /* This is just a placeholder in the command data structures. */
2035 user_defined_command (ignore
, from_tty
)
2042 define_command (comname
, from_tty
)
2046 register struct command_line
*cmds
;
2047 register struct cmd_list_element
*c
, *newc
, *hookc
= 0;
2048 char *tem
= comname
;
2049 #define HOOK_STRING "hook-"
2052 validate_comname (comname
);
2054 /* Look it up, and verify that we got an exact match. */
2055 c
= lookup_cmd (&tem
, cmdlist
, "", -1, 1);
2056 if (c
&& !STREQ (comname
, c
->name
))
2061 if (c
->class == class_user
|| c
->class == class_alias
)
2062 tem
= "Redefine command \"%s\"? ";
2064 tem
= "Really redefine built-in command \"%s\"? ";
2065 if (!query (tem
, c
->name
))
2066 error ("Command \"%s\" not redefined.", c
->name
);
2069 /* If this new command is a hook, then mark the command which it
2070 is hooking. Note that we allow hooking `help' commands, so that
2071 we can hook the `stop' pseudo-command. */
2073 if (!strncmp (comname
, HOOK_STRING
, HOOK_LEN
))
2075 /* Look up cmd it hooks, and verify that we got an exact match. */
2076 tem
= comname
+HOOK_LEN
;
2077 hookc
= lookup_cmd (&tem
, cmdlist
, "", -1, 0);
2078 if (hookc
&& !STREQ (comname
+HOOK_LEN
, hookc
->name
))
2082 warning ("Your new `%s' command does not hook any existing command.",
2084 if (!query ("Proceed? ", (char *)0))
2085 error ("Not confirmed.");
2089 comname
= savestring (comname
, strlen (comname
));
2091 /* If the rest of the commands will be case insensitive, this one
2092 should behave in the same manner. */
2093 for (tem
= comname
; *tem
; tem
++)
2094 if (isupper(*tem
)) *tem
= tolower(*tem
);
2098 printf_unfiltered ("Type commands for definition of \"%s\".\n\
2099 End with a line saying just \"end\".\n", comname
);
2100 gdb_flush (gdb_stdout
);
2103 cmds
= read_command_lines ();
2105 if (c
&& c
->class == class_user
)
2106 free_command_lines (&c
->user_commands
);
2108 newc
= add_cmd (comname
, class_user
, user_defined_command
,
2109 (c
&& c
->class == class_user
)
2110 ? c
->doc
: savestring ("User-defined.", 13), &cmdlist
);
2111 newc
->user_commands
= cmds
;
2113 /* If this new command is a hook, then mark both commands as being
2117 hookc
->hook
= newc
; /* Target gets hooked. */
2118 newc
->hookee
= hookc
; /* We are marked as hooking target cmd. */
2123 document_command (comname
, from_tty
)
2127 struct command_line
*doclines
;
2128 register struct cmd_list_element
*c
;
2129 char *tem
= comname
;
2131 validate_comname (comname
);
2133 c
= lookup_cmd (&tem
, cmdlist
, "", 0, 1);
2135 if (c
->class != class_user
)
2136 error ("Command \"%s\" is built-in.", comname
);
2139 printf_unfiltered ("Type documentation for \"%s\".\n\
2140 End with a line saying just \"end\".\n", comname
);
2142 doclines
= read_command_lines ();
2144 if (c
->doc
) free (c
->doc
);
2147 register struct command_line
*cl1
;
2148 register int len
= 0;
2150 for (cl1
= doclines
; cl1
; cl1
= cl1
->next
)
2151 len
+= strlen (cl1
->line
) + 1;
2153 c
->doc
= (char *) xmalloc (len
+ 1);
2156 for (cl1
= doclines
; cl1
; cl1
= cl1
->next
)
2158 strcat (c
->doc
, cl1
->line
);
2160 strcat (c
->doc
, "\n");
2164 free_command_lines (&doclines
);
2168 print_gnu_advertisement()
2170 printf_unfiltered ("\
2171 GDB is free software and you are welcome to distribute copies of it\n\
2172 under certain conditions; type \"show copying\" to see the conditions.\n\
2173 There is absolutely no warranty for GDB; type \"show warranty\" for details.\n\
2178 print_gdb_version (stream
)
2181 fprintf_filtered (stream
, "\
2182 GDB %s (%s", version
, host_canonical
);
2184 if (strcmp(host_canonical
, target_canonical
))
2185 fprintf_filtered (stream
, " --target %s", target_canonical
);
2187 fprintf_filtered (stream
, "), ");
2189 fprintf_filtered (stream
, "Copyright 1993 Free Software Foundation, Inc.");
2194 show_version (args
, from_tty
)
2199 print_gnu_advertisement ();
2200 print_gdb_version (gdb_stdout
);
2201 printf_filtered ("\n");
2205 /* xgdb calls this to reprint the usual GDB prompt. */
2210 printf_unfiltered ("%s", prompt
);
2211 gdb_flush (gdb_stdout
);
2215 quit_command (args
, from_tty
)
2219 if (inferior_pid
!= 0 && target_has_execution
)
2223 if (query ("The program is running. Quit anyway (and detach it)? "))
2224 target_detach (args
, from_tty
);
2226 error ("Not confirmed.");
2230 if (query ("The program is running. Quit anyway (and kill it)? "))
2233 error ("Not confirmed.");
2236 /* Save the history information if it is appropriate to do so. */
2237 if (write_history_p
&& history_filename
)
2238 write_history (history_filename
);
2242 /* Returns whether GDB is running on a terminal and whether the user
2243 desires that questions be asked of them on that terminal. */
2246 input_from_terminal_p ()
2248 return gdb_has_a_terminal () && (instream
== stdin
) & caution
;
2253 pwd_command (args
, from_tty
)
2257 if (args
) error ("The \"pwd\" command does not take an argument: %s", args
);
2258 getcwd (dirbuf
, sizeof (dirbuf
));
2260 if (!STREQ (dirbuf
, current_directory
))
2261 printf_unfiltered ("Working directory %s\n (canonically %s).\n",
2262 current_directory
, dirbuf
);
2264 printf_unfiltered ("Working directory %s.\n", current_directory
);
2268 cd_command (dir
, from_tty
)
2273 /* Found something other than leading repetitions of "/..". */
2274 int found_real_path
;
2277 /* If the new directory is absolute, repeat is a no-op; if relative,
2278 repeat might be useful but is more likely to be a mistake. */
2282 error_no_arg ("new working directory");
2284 dir
= tilde_expand (dir
);
2285 make_cleanup (free
, dir
);
2287 if (chdir (dir
) < 0)
2288 perror_with_name (dir
);
2291 dir
= savestring (dir
, len
- (len
> 1 && dir
[len
-1] == '/'));
2293 current_directory
= dir
;
2296 if (current_directory
[0] == '/' && current_directory
[1] == '\0')
2297 current_directory
= concat (current_directory
, dir
, NULL
);
2299 current_directory
= concat (current_directory
, "/", dir
, NULL
);
2303 /* Now simplify any occurrences of `.' and `..' in the pathname. */
2305 found_real_path
= 0;
2306 for (p
= current_directory
; *p
;)
2308 if (p
[0] == '/' && p
[1] == '.' && (p
[2] == 0 || p
[2] == '/'))
2310 else if (p
[0] == '/' && p
[1] == '.' && p
[2] == '.'
2311 && (p
[3] == 0 || p
[3] == '/'))
2313 if (found_real_path
)
2315 /* Search backwards for the directory just before the "/.."
2316 and obliterate it and the "/..". */
2318 while (q
!= current_directory
&& q
[-1] != '/')
2321 if (q
== current_directory
)
2322 /* current_directory is
2323 a relative pathname ("can't happen"--leave it alone). */
2327 strcpy (q
- 1, p
+ 3);
2332 /* We are dealing with leading repetitions of "/..", for example
2333 "/../..", which is the Mach super-root. */
2338 found_real_path
= 1;
2343 forget_cached_source_info ();
2346 pwd_command ((char *) 0, 1);
2349 struct source_cleanup_lines_args
{
2352 char *old_pre_error
;
2353 char *old_error_pre_print
;
2357 source_cleanup_lines (args
)
2360 struct source_cleanup_lines_args
*p
=
2361 (struct source_cleanup_lines_args
*)args
;
2362 source_line_number
= p
->old_line
;
2363 source_file_name
= p
->old_file
;
2364 source_pre_error
= p
->old_pre_error
;
2365 error_pre_print
= p
->old_error_pre_print
;
2370 source_command (args
, from_tty
)
2375 struct cleanup
*old_cleanups
;
2377 struct source_cleanup_lines_args old_lines
;
2382 error ("source command requires pathname of file to source.");
2385 file
= tilde_expand (file
);
2386 old_cleanups
= make_cleanup (free
, file
);
2388 stream
= fopen (file
, FOPEN_RT
);
2390 perror_with_name (file
);
2392 make_cleanup (fclose
, stream
);
2394 old_lines
.old_line
= source_line_number
;
2395 old_lines
.old_file
= source_file_name
;
2396 old_lines
.old_pre_error
= source_pre_error
;
2397 old_lines
.old_error_pre_print
= error_pre_print
;
2398 make_cleanup (source_cleanup_lines
, &old_lines
);
2399 source_line_number
= 0;
2400 source_file_name
= file
;
2401 source_pre_error
= error_pre_print
== NULL
? "" : error_pre_print
;
2402 source_pre_error
= savestring (source_pre_error
, strlen (source_pre_error
));
2403 make_cleanup (free
, source_pre_error
);
2404 /* This will get set every time we read a line. So it won't stay "" for
2406 error_pre_print
= "";
2408 needed_length
= strlen (source_file_name
) + strlen (source_pre_error
) + 80;
2409 if (source_error_allocated
< needed_length
)
2411 source_error_allocated
*= 2;
2412 if (source_error_allocated
< needed_length
)
2413 source_error_allocated
= needed_length
;
2414 if (source_error
== NULL
)
2415 source_error
= xmalloc (source_error_allocated
);
2417 source_error
= xrealloc (source_error
, source_error_allocated
);
2420 read_command_file (stream
);
2422 do_cleanups (old_cleanups
);
2427 echo_command (text
, from_tty
)
2435 while ((c
= *p
++) != '\0')
2439 /* \ at end of argument is used after spaces
2440 so they won't be lost. */
2444 c
= parse_escape (&p
);
2446 printf_filtered ("%c", c
);
2449 printf_filtered ("%c", c
);
2452 /* Force this output to appear now. */
2454 gdb_flush (gdb_stdout
);
2458 /* Functions to manipulate command line editing control variables. */
2460 /* Number of commands to print in each call to show_commands. */
2461 #define Hist_print 10
2463 show_commands (args
, from_tty
)
2467 /* Index for history commands. Relative to history_base. */
2470 /* Number of the history entry which we are planning to display next.
2471 Relative to history_base. */
2474 /* The first command in the history which doesn't exist (i.e. one more
2475 than the number of the last command). Relative to history_base. */
2478 extern struct _hist_entry
*history_get
PARAMS ((int));
2479 extern int history_base
;
2481 /* Print out some of the commands from the command history. */
2482 /* First determine the length of the history list. */
2483 hist_len
= history_size
;
2484 for (offset
= 0; offset
< history_size
; offset
++)
2486 if (!history_get (history_base
+ offset
))
2495 if (args
[0] == '+' && args
[1] == '\0')
2496 /* "info editing +" should print from the stored position. */
2499 /* "info editing <exp>" should print around command number <exp>. */
2500 num
= (parse_and_eval_address (args
) - history_base
) - Hist_print
/ 2;
2502 /* "show commands" means print the last Hist_print commands. */
2505 num
= hist_len
- Hist_print
;
2511 /* If there are at least Hist_print commands, we want to display the last
2512 Hist_print rather than, say, the last 6. */
2513 if (hist_len
- num
< Hist_print
)
2515 num
= hist_len
- Hist_print
;
2520 for (offset
= num
; offset
< num
+ Hist_print
&& offset
< hist_len
; offset
++)
2522 printf_filtered ("%5d %s\n", history_base
+ offset
,
2523 (history_get (history_base
+ offset
))->line
);
2526 /* The next command we want to display is the next one that we haven't
2530 /* If the user repeats this command with return, it should do what
2531 "show commands +" does. This is unnecessary if arg is null,
2532 because "show commands +" is not useful after "show commands". */
2533 if (from_tty
&& args
)
2540 /* Called by do_setshow_command. */
2543 set_history_size_command (args
, from_tty
, c
)
2546 struct cmd_list_element
*c
;
2548 if (history_size
== INT_MAX
)
2549 unstifle_history ();
2550 else if (history_size
>= 0)
2551 stifle_history (history_size
);
2554 history_size
= INT_MAX
;
2555 error ("History size must be non-negative");
2561 set_history (args
, from_tty
)
2565 printf_unfiltered ("\"set history\" must be followed by the name of a history subcommand.\n");
2566 help_list (sethistlist
, "set history ", -1, gdb_stdout
);
2571 show_history (args
, from_tty
)
2575 cmd_show_list (showhistlist
, from_tty
, "");
2578 int info_verbose
= 0; /* Default verbose msgs off */
2580 /* Called by do_setshow_command. An elaborate joke. */
2583 set_verbose (args
, from_tty
, c
)
2586 struct cmd_list_element
*c
;
2588 char *cmdname
= "verbose";
2589 struct cmd_list_element
*showcmd
;
2591 showcmd
= lookup_cmd_1 (&cmdname
, showlist
, NULL
, 1);
2595 c
->doc
= "Set verbose printing of informational messages.";
2596 showcmd
->doc
= "Show verbose printing of informational messages.";
2600 c
->doc
= "Set verbosity.";
2601 showcmd
->doc
= "Show verbosity.";
2606 float_handler (signo
)
2609 /* This message is based on ANSI C, section 4.7. Note that integer
2610 divide by zero causes this, so "float" is a misnomer. */
2611 signal (SIGFPE
, float_handler
);
2612 error ("Erroneous arithmetic operation.");
2615 /* Return whether we are running a batch file or from terminal. */
2619 return !(instream
== stdin
&& ISATTY (stdin
));
2631 enablebreaklist
= NULL
;
2636 showhistlist
= NULL
;
2637 unsethistlist
= NULL
;
2638 #if MAINTENANCE_CMDS
2639 maintenancelist
= NULL
;
2640 maintenanceinfolist
= NULL
;
2641 maintenanceprintlist
= NULL
;
2643 setprintlist
= NULL
;
2644 showprintlist
= NULL
;
2645 setchecklist
= NULL
;
2646 showchecklist
= NULL
;
2649 /* Init the history buffer. Note that we are called after the init file(s)
2650 * have been read so that the user can change the history file via his
2651 * .gdbinit file (for instance). The GDBHISTFILE environment variable
2652 * overrides all of this.
2660 tmpenv
= getenv ("HISTSIZE");
2662 history_size
= atoi (tmpenv
);
2663 else if (!history_size
)
2666 stifle_history (history_size
);
2668 tmpenv
= getenv ("GDBHISTFILE");
2670 history_filename
= savestring (tmpenv
, strlen(tmpenv
));
2671 else if (!history_filename
) {
2672 /* We include the current directory so that if the user changes
2673 directories the file written will be the same as the one
2675 history_filename
= concat (current_directory
, "/.gdb_history", NULL
);
2677 read_history (history_filename
);
2683 struct cmd_list_element
*c
;
2685 #ifdef DEFAULT_PROMPT
2686 prompt
= savestring (DEFAULT_PROMPT
, strlen(DEFAULT_PROMPT
));
2688 prompt
= savestring ("(gdb) ", 6);
2691 /* Set the important stuff up for command editing. */
2692 command_editing_p
= 1;
2693 history_expansion_p
= 0;
2694 write_history_p
= 0;
2696 /* Setup important stuff for command line editing. */
2697 rl_completion_entry_function
= (int (*)()) symbol_completion_function
;
2698 rl_completer_word_break_characters
= gdb_completer_word_break_characters
;
2699 rl_completer_quote_characters
= gdb_completer_quote_characters
;
2700 rl_readline_name
= "gdb";
2702 /* Define the classes of commands.
2703 They will appear in the help list in the reverse of this order. */
2705 add_cmd ("internals", class_maintenance
, NO_FUNCTION
,
2706 "Maintenance commands.\n\
2707 Some gdb commands are provided just for use by gdb maintainers.\n\
2708 These commands are subject to frequent change, and may not be as\n\
2709 well documented as user commands.",
2711 add_cmd ("obscure", class_obscure
, NO_FUNCTION
, "Obscure features.", &cmdlist
);
2712 add_cmd ("aliases", class_alias
, NO_FUNCTION
, "Aliases of other commands.", &cmdlist
);
2713 add_cmd ("user-defined", class_user
, NO_FUNCTION
, "User-defined commands.\n\
2714 The commands in this class are those defined by the user.\n\
2715 Use the \"define\" command to define a command.", &cmdlist
);
2716 add_cmd ("support", class_support
, NO_FUNCTION
, "Support facilities.", &cmdlist
);
2717 add_cmd ("status", class_info
, NO_FUNCTION
, "Status inquiries.", &cmdlist
);
2718 add_cmd ("files", class_files
, NO_FUNCTION
, "Specifying and examining files.", &cmdlist
);
2719 add_cmd ("breakpoints", class_breakpoint
, NO_FUNCTION
, "Making program stop at certain points.", &cmdlist
);
2720 add_cmd ("data", class_vars
, NO_FUNCTION
, "Examining data.", &cmdlist
);
2721 add_cmd ("stack", class_stack
, NO_FUNCTION
, "Examining the stack.\n\
2722 The stack is made up of stack frames. Gdb assigns numbers to stack frames\n\
2723 counting from zero for the innermost (currently executing) frame.\n\n\
2724 At any time gdb identifies one frame as the \"selected\" frame.\n\
2725 Variable lookups are done with respect to the selected frame.\n\
2726 When the program being debugged stops, gdb selects the innermost frame.\n\
2727 The commands below can be used to select other frames by number or address.",
2729 add_cmd ("running", class_run
, NO_FUNCTION
, "Running the program.", &cmdlist
);
2731 add_com ("pwd", class_files
, pwd_command
,
2732 "Print working directory. This is used for your program as well.");
2733 c
= add_cmd ("cd", class_files
, cd_command
,
2734 "Set working directory to DIR for debugger and program being debugged.\n\
2735 The change does not take effect for the program being debugged\n\
2736 until the next time it is started.", &cmdlist
);
2737 c
->completer
= filename_completer
;
2740 (add_set_cmd ("prompt", class_support
, var_string
, (char *)&prompt
,
2745 add_com ("echo", class_support
, echo_command
,
2746 "Print a constant string. Give string as argument.\n\
2747 C escape sequences may be used in the argument.\n\
2748 No newline is added at the end of the argument;\n\
2749 use \"\\n\" if you want a newline to be printed.\n\
2750 Since leading and trailing whitespace are ignored in command arguments,\n\
2751 if you want to print some you must use \"\\\" before leading whitespace\n\
2752 to be printed or after trailing whitespace.");
2753 add_com ("document", class_support
, document_command
,
2754 "Document a user-defined command.\n\
2755 Give command name as argument. Give documentation on following lines.\n\
2756 End with a line of just \"end\".");
2757 add_com ("define", class_support
, define_command
,
2758 "Define a new command name. Command name is argument.\n\
2759 Definition appears on following lines, one command per line.\n\
2760 End with a line of just \"end\".\n\
2761 Use the \"document\" command to give documentation for the new command.\n\
2762 Commands defined in this way do not take arguments.");
2765 c
= add_cmd ("source", class_support
, source_command
,
2766 "Read commands from a file named FILE.\n\
2767 Note that the file \"" GDBINIT_FILENAME
"\" is read automatically in this way\n\
2768 when gdb is started.", &cmdlist
);
2770 /* Punt file name, we can't help it easily. */
2771 c
= add_cmd ("source", class_support
, source_command
,
2772 "Read commands from a file named FILE.\n\
2773 Note that the file \".gdbinit\" is read automatically in this way\n\
2774 when gdb is started.", &cmdlist
);
2776 c
->completer
= filename_completer
;
2778 add_com ("quit", class_support
, quit_command
, "Exit gdb.");
2779 add_com ("help", class_support
, help_command
, "Print list of commands.");
2780 add_com_alias ("q", "quit", class_support
, 1);
2781 add_com_alias ("h", "help", class_support
, 1);
2784 c
= add_set_cmd ("verbose", class_support
, var_boolean
, (char *)&info_verbose
,
2787 add_show_from_set (c
, &showlist
);
2788 c
->function
.sfunc
= set_verbose
;
2789 set_verbose (NULL
, 0, c
);
2792 (add_set_cmd ("editing", class_support
, var_boolean
, (char *)&command_editing_p
,
2793 "Set editing of command lines as they are typed.\n\
2794 Use \"on\" to enable to enable the editing, and \"off\" to disable it.\n\
2795 Without an argument, command line editing is enabled. To edit, use\n\
2796 EMACS-like or VI-like commands like control-P or ESC.", &setlist
),
2799 add_prefix_cmd ("history", class_support
, set_history
,
2800 "Generic command for setting command history parameters.",
2801 &sethistlist
, "set history ", 0, &setlist
);
2802 add_prefix_cmd ("history", class_support
, show_history
,
2803 "Generic command for showing command history parameters.",
2804 &showhistlist
, "show history ", 0, &showlist
);
2807 (add_set_cmd ("expansion", no_class
, var_boolean
, (char *)&history_expansion_p
,
2808 "Set history expansion on command input.\n\
2809 Without an argument, history expansion is enabled.", &sethistlist
),
2813 (add_set_cmd ("save", no_class
, var_boolean
, (char *)&write_history_p
,
2814 "Set saving of the history record on exit.\n\
2815 Use \"on\" to enable to enable the saving, and \"off\" to disable it.\n\
2816 Without an argument, saving is enabled.", &sethistlist
),
2819 c
= add_set_cmd ("size", no_class
, var_integer
, (char *)&history_size
,
2820 "Set the size of the command history, \n\
2821 ie. the number of previous commands to keep a record of.", &sethistlist
);
2822 add_show_from_set (c
, &showhistlist
);
2823 c
->function
.sfunc
= set_history_size_command
;
2826 (add_set_cmd ("filename", no_class
, var_filename
, (char *)&history_filename
,
2827 "Set the filename in which to record the command history\n\
2828 (the list of previous commands of which a record is kept).", &sethistlist
),
2832 (add_set_cmd ("confirm", class_support
, var_boolean
,
2834 "Set whether to confirm potentially dangerous operations.",
2838 add_prefix_cmd ("info", class_info
, info_command
,
2839 "Generic command for showing things about the program being debugged.",
2840 &infolist
, "info ", 0, &cmdlist
);
2841 add_com_alias ("i", "info", class_info
, 1);
2843 add_prefix_cmd ("show", class_info
, show_command
,
2844 "Generic command for showing things about the debugger.",
2845 &showlist
, "show ", 0, &cmdlist
);
2846 /* Another way to get at the same thing. */
2847 add_info ("set", show_command
, "Show all GDB settings.");
2849 add_cmd ("commands", no_class
, show_commands
,
2850 "Show the the history of commands you typed.\n\
2851 You can supply a command number to start with, or a `+' to start after\n\
2852 the previous command number shown.",
2855 add_cmd ("version", no_class
, show_version
,
2856 "Show what version of GDB this is.", &showlist
);
2858 /* If target is open when baud changes, it doesn't take effect until the
2859 next open (I think, not sure). */
2860 add_show_from_set (add_set_cmd ("remotebaud", no_class
,
2861 var_zinteger
, (char *)&baud_rate
,
2862 "Set baud rate for remote serial I/O.\n\
2863 This value is used to set the speed of the serial port when debugging\n\
2864 using remote targets.", &setlist
),
2868 add_set_cmd ("remotedebug", no_class
, var_zinteger
, (char *)&remote_debug
,
2869 "Set debugging of remote protocol.\n\
2870 When enabled, each packet sent or received with the remote target\n\
2871 is displayed.", &setlist
),