1 /* Memory-access and commands for "inferior" process, for GDB.
3 Copyright (C) 1986-2015 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 3 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, see <http://www.gnu.org/licenses/>. */
21 #include "arch-utils.h"
36 #include "completer.h"
38 #include "event-top.h"
39 #include "parser-defs.h"
41 #include "reggroups.h"
46 #include "target-descriptions.h"
47 #include "user-regs.h"
48 #include "cli/cli-decode.h"
49 #include "gdbthread.h"
51 #include "inline-frame.h"
52 #include "tracepoint.h"
54 #include "continuations.h"
56 #include "cli/cli-utils.h"
58 /* Local functions: */
60 static void nofp_registers_info (char *, int);
62 static void print_return_value (struct value
*function
,
63 struct type
*value_type
);
65 static void until_next_command (int);
67 static void until_command (char *, int);
69 static void path_info (char *, int);
71 static void path_command (char *, int);
73 static void unset_command (char *, int);
75 static void float_info (char *, int);
77 static void disconnect_command (char *, int);
79 static void unset_environment_command (char *, int);
81 static void set_environment_command (char *, int);
83 static void environment_info (char *, int);
85 static void program_info (char *, int);
87 static void finish_command (char *, int);
89 static void signal_command (char *, int);
91 static void jump_command (char *, int);
93 static void step_1 (int, int, char *);
94 static void step_once (int skip_subroutines
, int single_inst
,
95 int count
, int thread
);
97 static void next_command (char *, int);
99 static void step_command (char *, int);
101 static void run_command (char *, int);
103 static void run_no_args_command (char *args
, int from_tty
);
105 static void go_command (char *line_no
, int from_tty
);
107 void _initialize_infcmd (void);
109 #define ERROR_NO_INFERIOR \
110 if (!target_has_execution) error (_("The program is not being run."));
112 /* Scratch area where string containing arguments to give to the
113 program will be stored by 'set args'. As soon as anything is
114 stored, notice_args_set will move it into per-inferior storage.
115 Arguments are separated by spaces. Empty string (pointer to '\0')
118 static char *inferior_args_scratch
;
120 /* Scratch area where 'set inferior-tty' will store user-provided value.
121 We'll immediate copy it into per-inferior storage. */
123 static char *inferior_io_terminal_scratch
;
125 /* Pid of our debugged inferior, or 0 if no inferior now.
126 Since various parts of infrun.c test this to see whether there is a program
127 being debugged it should be nonzero (currently 3 is used) for remote
130 ptid_t inferior_ptid
;
132 /* Address at which inferior stopped. */
136 /* Nonzero if stopped due to completion of a stack dummy routine. */
138 enum stop_stack_kind stop_stack_dummy
;
140 /* Nonzero if stopped due to a random (unexpected) signal in inferior
143 int stopped_by_random_signal
;
145 /* See inferior.h. */
147 int startup_with_shell
= 1;
150 /* Accessor routines. */
152 /* Set the io terminal for the current inferior. Ownership of
153 TERMINAL_NAME is not transferred. */
156 set_inferior_io_terminal (const char *terminal_name
)
158 xfree (current_inferior ()->terminal
);
159 current_inferior ()->terminal
= terminal_name
? xstrdup (terminal_name
) : 0;
163 get_inferior_io_terminal (void)
165 return current_inferior ()->terminal
;
169 set_inferior_tty_command (char *args
, int from_tty
,
170 struct cmd_list_element
*c
)
172 /* CLI has assigned the user-provided value to inferior_io_terminal_scratch.
173 Now route it to current inferior. */
174 set_inferior_io_terminal (inferior_io_terminal_scratch
);
178 show_inferior_tty_command (struct ui_file
*file
, int from_tty
,
179 struct cmd_list_element
*c
, const char *value
)
181 /* Note that we ignore the passed-in value in favor of computing it
183 const char *inferior_io_terminal
= get_inferior_io_terminal ();
185 if (inferior_io_terminal
== NULL
)
186 inferior_io_terminal
= "";
187 fprintf_filtered (gdb_stdout
,
188 _("Terminal for future runs of program being debugged "
189 "is \"%s\".\n"), inferior_io_terminal
);
193 get_inferior_args (void)
195 if (current_inferior ()->argc
!= 0)
199 n
= construct_inferior_arguments (current_inferior ()->argc
,
200 current_inferior ()->argv
);
201 set_inferior_args (n
);
205 if (current_inferior ()->args
== NULL
)
206 current_inferior ()->args
= xstrdup ("");
208 return current_inferior ()->args
;
211 /* Set the arguments for the current inferior. Ownership of
212 NEWARGS is not transferred. */
215 set_inferior_args (char *newargs
)
217 xfree (current_inferior ()->args
);
218 current_inferior ()->args
= newargs
? xstrdup (newargs
) : NULL
;
219 current_inferior ()->argc
= 0;
220 current_inferior ()->argv
= 0;
224 set_inferior_args_vector (int argc
, char **argv
)
226 current_inferior ()->argc
= argc
;
227 current_inferior ()->argv
= argv
;
230 /* Notice when `set args' is run. */
233 set_args_command (char *args
, int from_tty
, struct cmd_list_element
*c
)
235 /* CLI has assigned the user-provided value to inferior_args_scratch.
236 Now route it to current inferior. */
237 set_inferior_args (inferior_args_scratch
);
240 /* Notice when `show args' is run. */
243 show_args_command (struct ui_file
*file
, int from_tty
,
244 struct cmd_list_element
*c
, const char *value
)
246 /* Note that we ignore the passed-in value in favor of computing it
248 deprecated_show_value_hack (file
, from_tty
, c
, get_inferior_args ());
252 /* Compute command-line string given argument vector. This does the
253 same shell processing as fork_inferior. */
256 construct_inferior_arguments (int argc
, char **argv
)
260 if (startup_with_shell
)
263 /* This holds all the characters considered special to the
265 char *special
= "\"!&*|[]{}<>?`~^=;, \t\n";
266 const char quote
= '"';
268 /* This holds all the characters considered special to the
269 typical Unix shells. We include `^' because the SunOS
270 /bin/sh treats it as a synonym for `|'. */
271 char *special
= "\"!#$&*()\\|[]{}<>?'`~^; \t\n";
272 const char quote
= '\'';
278 /* We over-compute the size. It shouldn't matter. */
279 for (i
= 0; i
< argc
; ++i
)
280 length
+= 3 * strlen (argv
[i
]) + 1 + 2 * (argv
[i
][0] == '\0');
282 result
= (char *) xmalloc (length
);
285 for (i
= 0; i
< argc
; ++i
)
290 /* Need to handle empty arguments specially. */
291 if (argv
[i
][0] == '\0')
301 if (strpbrk (argv
[i
], special
))
307 for (cp
= argv
[i
]; *cp
; ++cp
)
311 /* A newline cannot be quoted with a backslash (it
312 just disappears), only by putting it inside
323 if (strchr (special
, *cp
) != NULL
)
339 /* In this case we can't handle arguments that contain spaces,
340 tabs, or newlines -- see breakup_args(). */
344 for (i
= 0; i
< argc
; ++i
)
346 char *cp
= strchr (argv
[i
], ' ');
348 cp
= strchr (argv
[i
], '\t');
350 cp
= strchr (argv
[i
], '\n');
352 error (_("can't handle command-line "
353 "argument containing whitespace"));
354 length
+= strlen (argv
[i
]) + 1;
357 result
= (char *) xmalloc (length
);
359 for (i
= 0; i
< argc
; ++i
)
362 strcat (result
, " ");
363 strcat (result
, argv
[i
]);
371 /* This function strips the '&' character (indicating background
372 execution) that is added as *the last* of the arguments ARGS of a
373 command. A copy of the incoming ARGS without the '&' is returned,
374 unless the resulting string after stripping is empty, in which case
375 NULL is returned. *BG_CHAR_P is an output boolean that indicates
376 whether the '&' character was found. */
379 strip_bg_char (const char *args
, int *bg_char_p
)
383 if (args
== NULL
|| *args
== '\0')
389 p
= args
+ strlen (args
);
393 while (p
> args
&& isspace (p
[-1]))
398 return savestring (args
, p
- args
);
404 return xstrdup (args
);
407 /* Common actions to take after creating any sort of inferior, by any
408 means (running, attaching, connecting, et cetera). The target
409 should be stopped. */
412 post_create_inferior (struct target_ops
*target
, int from_tty
)
414 volatile struct gdb_exception ex
;
416 /* Be sure we own the terminal in case write operations are performed. */
417 target_terminal_ours ();
419 /* If the target hasn't taken care of this already, do it now.
420 Targets which need to access registers during to_open,
421 to_create_inferior, or to_attach should do it earlier; but many
423 target_find_description ();
425 /* Now that we know the register layout, retrieve current PC. But
426 if the PC is unavailable (e.g., we're opening a core file with
427 missing registers info), ignore it. */
429 TRY_CATCH (ex
, RETURN_MASK_ERROR
)
431 stop_pc
= regcache_read_pc (get_current_regcache ());
433 if (ex
.reason
< 0 && ex
.error
!= NOT_AVAILABLE_ERROR
)
434 throw_exception (ex
);
438 const unsigned solib_add_generation
439 = current_program_space
->solib_add_generation
;
441 /* Create the hooks to handle shared library load and unload
443 solib_create_inferior_hook (from_tty
);
445 if (current_program_space
->solib_add_generation
== solib_add_generation
)
447 /* The platform-specific hook should load initial shared libraries,
448 but didn't. FROM_TTY will be incorrectly 0 but such solib
449 targets should be fixed anyway. Call it only after the solib
450 target has been initialized by solib_create_inferior_hook. */
453 warning (_("platform-specific solib_create_inferior_hook did "
454 "not load initial shared libraries."));
456 /* If the solist is global across processes, there's no need to
458 if (!gdbarch_has_global_solist (target_gdbarch ()))
459 solib_add (NULL
, 0, target
, auto_solib_add
);
463 /* If the user sets watchpoints before execution having started,
464 then she gets software watchpoints, because GDB can't know which
465 target will end up being pushed, or if it supports hardware
466 watchpoints or not. breakpoint_re_set takes care of promoting
467 watchpoints to hardware watchpoints if possible, however, if this
468 new inferior doesn't load shared libraries or we don't pull in
469 symbols from any other source on this target/arch,
470 breakpoint_re_set is never called. Call it now so that software
471 watchpoints get a chance to be promoted to hardware watchpoints
472 if the now pushed target supports hardware watchpoints. */
473 breakpoint_re_set ();
475 observer_notify_inferior_created (target
, from_tty
);
478 /* Kill the inferior if already running. This function is designed
479 to be called when we are about to start the execution of the program
480 from the beginning. Ask the user to confirm that he wants to restart
481 the program being debugged when FROM_TTY is non-null. */
484 kill_if_already_running (int from_tty
)
486 if (! ptid_equal (inferior_ptid
, null_ptid
) && target_has_execution
)
488 /* Bail out before killing the program if we will not be able to
490 target_require_runnable ();
493 && !query (_("The program being debugged has been started already.\n\
494 Start it from the beginning? ")))
495 error (_("Program not restarted."));
500 /* See inferior.h. */
503 prepare_execution_command (struct target_ops
*target
, int background
)
505 /* If we get a request for running in the bg but the target
506 doesn't support it, error out. */
507 if (background
&& !target
->to_can_async_p (target
))
508 error (_("Asynchronous execution not supported on this target."));
510 /* If we don't get a request of running in the bg, then we need
511 to simulate synchronous (fg) execution. */
512 if (!background
&& target
->to_can_async_p (target
))
514 /* Simulate synchronous execution. Note no cleanup is necessary
515 for this. stdin is re-enabled whenever an error reaches the
517 async_disable_stdin ();
521 /* Implement the "run" command. If TBREAK_AT_MAIN is set, then insert
522 a temporary breakpoint at the begining of the main program before
523 running the program. */
526 run_command_1 (char *args
, int from_tty
, int tbreak_at_main
)
529 struct cleanup
*old_chain
;
531 struct ui_out
*uiout
= current_uiout
;
532 struct target_ops
*run_target
;
534 struct cleanup
*args_chain
;
538 kill_if_already_running (from_tty
);
540 init_wait_for_inferior ();
541 clear_breakpoint_hit_counts ();
543 /* Clean up any leftovers from other runs. Some other things from
544 this function should probably be moved into target_pre_inferior. */
545 target_pre_inferior (from_tty
);
547 /* The comment here used to read, "The exec file is re-read every
548 time we do a generic_mourn_inferior, so we just have to worry
549 about the symbol file." The `generic_mourn_inferior' function
550 gets called whenever the program exits. However, suppose the
551 program exits, and *then* the executable file changes? We need
552 to check again here. Since reopen_exec_file doesn't do anything
553 if the timestamp hasn't changed, I don't see the harm. */
557 args
= strip_bg_char (args
, &async_exec
);
558 args_chain
= make_cleanup (xfree
, args
);
560 /* Do validation and preparation before possibly changing anything
563 run_target
= find_run_target ();
565 prepare_execution_command (run_target
, async_exec
);
567 if (non_stop
&& !run_target
->to_supports_non_stop (run_target
))
568 error (_("The target does not support running in non-stop mode."));
570 /* Done. Can now set breakpoints, change inferior args, etc. */
572 /* Insert the temporary breakpoint if a location was specified. */
574 tbreak_command (main_name (), 0);
576 exec_file
= (char *) get_exec_file (0);
578 /* We keep symbols from add-symbol-file, on the grounds that the
579 user might want to add some symbols before running the program
580 (right?). But sometimes (dynamic loading where the user manually
581 introduces the new symbols with add-symbol-file), the code which
582 the symbols describe does not persist between runs. Currently
583 the user has to manually nuke all symbols between runs if they
584 want them to go away (PR 2207). This is probably reasonable. */
586 /* If there were other args, beside '&', process them. */
588 set_inferior_args (args
);
592 ui_out_field_string (uiout
, NULL
, "Starting program");
593 ui_out_text (uiout
, ": ");
595 ui_out_field_string (uiout
, "execfile", exec_file
);
596 ui_out_spaces (uiout
, 1);
597 /* We call get_inferior_args() because we might need to compute
599 ui_out_field_string (uiout
, "infargs", get_inferior_args ());
600 ui_out_text (uiout
, "\n");
601 ui_out_flush (uiout
);
604 /* Done with ARGS. */
605 do_cleanups (args_chain
);
607 /* We call get_inferior_args() because we might need to compute
609 run_target
->to_create_inferior (run_target
, exec_file
, get_inferior_args (),
610 environ_vector (current_inferior ()->environment
),
612 /* to_create_inferior should push the target, so after this point we
613 shouldn't refer to run_target again. */
616 /* We're starting off a new process. When we get out of here, in
617 non-stop mode, finish the state of all threads of that process,
618 but leave other threads alone, as they may be stopped in internal
619 events --- the frontend shouldn't see them as stopped. In
620 all-stop, always finish the state of all threads, as we may be
621 resuming more than just the new process. */
623 ptid
= pid_to_ptid (ptid_get_pid (inferior_ptid
));
625 ptid
= minus_one_ptid
;
626 old_chain
= make_cleanup (finish_thread_state_cleanup
, &ptid
);
628 /* Pass zero for FROM_TTY, because at this point the "run" command
629 has done its thing; now we are setting up the running program. */
630 post_create_inferior (¤t_target
, 0);
632 /* Start the target running. Do not use -1 continuation as it would skip
633 breakpoint right at the entry point. */
634 proceed (regcache_read_pc (get_current_regcache ()), GDB_SIGNAL_0
, 0);
636 /* Since there was no error, there's no need to finish the thread
638 discard_cleanups (old_chain
);
642 run_command (char *args
, int from_tty
)
644 run_command_1 (args
, from_tty
, 0);
648 run_no_args_command (char *args
, int from_tty
)
650 set_inferior_args ("");
654 /* Start the execution of the program up until the beginning of the main
658 start_command (char *args
, int from_tty
)
660 /* Some languages such as Ada need to search inside the program
661 minimal symbols for the location where to put the temporary
662 breakpoint before starting. */
663 if (!have_minimal_symbols ())
664 error (_("No symbol table loaded. Use the \"file\" command."));
666 /* Run the program until reaching the main procedure... */
667 run_command_1 (args
, from_tty
, 1);
671 proceed_thread_callback (struct thread_info
*thread
, void *arg
)
673 /* We go through all threads individually instead of compressing
674 into a single target `resume_all' request, because some threads
675 may be stopped in internal breakpoints/events, or stopped waiting
676 for its turn in the displaced stepping queue (that is, they are
677 running && !executing). The target side has no idea about why
678 the thread is stopped, so a `resume_all' command would resume too
679 much. If/when GDB gains a way to tell the target `hold this
680 thread stopped until I say otherwise', then we can optimize
682 if (!is_stopped (thread
->ptid
))
685 switch_to_thread (thread
->ptid
);
686 clear_proceed_status (0);
687 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
, 0);
692 ensure_valid_thread (void)
694 if (ptid_equal (inferior_ptid
, null_ptid
)
695 || is_exited (inferior_ptid
))
696 error (_("Cannot execute this command without a live selected thread."));
699 /* If the user is looking at trace frames, any resumption of execution
700 is likely to mix up recorded and live target data. So simply
701 disallow those commands. */
704 ensure_not_tfind_mode (void)
706 if (get_traceframe_number () >= 0)
707 error (_("Cannot execute this command while looking at trace frames."));
710 /* Throw an error indicating the current thread is running. */
713 error_is_running (void)
715 error (_("Cannot execute this command while "
716 "the selected thread is running."));
719 /* Calls error_is_running if the current thread is running. */
722 ensure_not_running (void)
724 if (is_running (inferior_ptid
))
729 continue_1 (int all_threads
)
732 ensure_not_tfind_mode ();
734 if (non_stop
&& all_threads
)
736 /* Don't error out if the current thread is running, because
737 there may be other stopped threads. */
738 struct cleanup
*old_chain
;
740 /* Backup current thread and selected frame. */
741 old_chain
= make_cleanup_restore_current_thread ();
743 iterate_over_threads (proceed_thread_callback
, NULL
);
747 /* If all threads in the target were already running,
748 proceed_thread_callback ends up never calling proceed,
749 and so nothing calls this to put the inferior's terminal
750 settings in effect and remove stdin from the event loop,
751 which we must when running a foreground command. E.g.:
755 <all threads are running now>
758 <no thread was resumed, but the inferior now owns the terminal>
760 target_terminal_inferior ();
763 /* Restore selected ptid. */
764 do_cleanups (old_chain
);
768 ensure_valid_thread ();
769 ensure_not_running ();
770 clear_proceed_status (0);
771 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
, 0);
775 /* continue [-a] [proceed-count] [&] */
778 continue_command (char *args
, int from_tty
)
782 struct cleanup
*args_chain
;
786 /* Find out whether we must run in the background. */
787 args
= strip_bg_char (args
, &async_exec
);
788 args_chain
= make_cleanup (xfree
, args
);
790 prepare_execution_command (¤t_target
, async_exec
);
794 if (startswith (args
, "-a"))
797 args
+= sizeof ("-a") - 1;
803 if (!non_stop
&& all_threads
)
804 error (_("`-a' is meaningless in all-stop mode."));
806 if (args
!= NULL
&& all_threads
)
807 error (_("Can't resume all threads and specify "
808 "proceed count simultaneously."));
810 /* If we have an argument left, set proceed count of breakpoint we
817 struct thread_info
*tp
;
820 tp
= find_thread_ptid (inferior_ptid
);
824 struct target_waitstatus ws
;
826 get_last_target_status (&last_ptid
, &ws
);
827 tp
= find_thread_ptid (last_ptid
);
830 bs
= tp
->control
.stop_bpstat
;
832 while ((stat
= bpstat_num (&bs
, &num
)) != 0)
835 set_ignore_count (num
,
836 parse_and_eval_long (args
) - 1,
838 /* set_ignore_count prints a message ending with a period.
839 So print two spaces before "Continuing.". */
841 printf_filtered (" ");
845 if (!stopped
&& from_tty
)
848 ("Not stopped at any breakpoint; argument ignored.\n");
852 /* Done with ARGS. */
853 do_cleanups (args_chain
);
856 printf_filtered (_("Continuing.\n"));
858 continue_1 (all_threads
);
861 /* Record the starting point of a "step" or "next" command. */
864 set_step_frame (void)
866 struct symtab_and_line sal
;
868 find_frame_sal (get_current_frame (), &sal
);
869 set_step_info (get_current_frame (), sal
);
872 /* Step until outside of current statement. */
875 step_command (char *count_string
, int from_tty
)
877 step_1 (0, 0, count_string
);
880 /* Likewise, but skip over subroutine calls as if single instructions. */
883 next_command (char *count_string
, int from_tty
)
885 step_1 (1, 0, count_string
);
888 /* Likewise, but step only one instruction. */
891 stepi_command (char *count_string
, int from_tty
)
893 step_1 (0, 1, count_string
);
897 nexti_command (char *count_string
, int from_tty
)
899 step_1 (1, 1, count_string
);
903 delete_longjmp_breakpoint_cleanup (void *arg
)
905 int thread
= * (int *) arg
;
906 delete_longjmp_breakpoint (thread
);
910 step_1 (int skip_subroutines
, int single_inst
, char *count_string
)
913 struct cleanup
*cleanups
= make_cleanup (null_cleanup
, NULL
);
916 struct cleanup
*args_chain
;
919 ensure_not_tfind_mode ();
920 ensure_valid_thread ();
921 ensure_not_running ();
923 count_string
= strip_bg_char (count_string
, &async_exec
);
924 args_chain
= make_cleanup (xfree
, count_string
);
926 prepare_execution_command (¤t_target
, async_exec
);
928 count
= count_string
? parse_and_eval_long (count_string
) : 1;
930 /* Done with ARGS. */
931 do_cleanups (args_chain
);
933 if (!single_inst
|| skip_subroutines
) /* Leave si command alone. */
935 struct thread_info
*tp
= inferior_thread ();
937 if (in_thread_list (inferior_ptid
))
938 thread
= pid_to_thread_id (inferior_ptid
);
940 set_longjmp_breakpoint (tp
, get_frame_id (get_current_frame ()));
942 make_cleanup (delete_longjmp_breakpoint_cleanup
, &thread
);
945 /* In synchronous case, all is well; each step_once call will step once. */
946 if (!target_can_async_p ())
948 for (; count
> 0; count
--)
950 step_once (skip_subroutines
, single_inst
, count
, thread
);
952 if (!target_has_execution
)
956 struct thread_info
*tp
= inferior_thread ();
958 if (!tp
->control
.stop_step
|| !tp
->step_multi
)
960 /* If we stopped for some reason that is not stepping
961 there are no further steps to make. */
968 do_cleanups (cleanups
);
972 /* In the case of an asynchronous target things get complicated;
973 do only one step for now, before returning control to the
974 event loop. Let the continuation figure out how many other
975 steps we need to do, and handle them one at the time, through
977 step_once (skip_subroutines
, single_inst
, count
, thread
);
979 /* We are running, and the continuation is installed. It will
980 disable the longjmp breakpoint as appropriate. */
981 discard_cleanups (cleanups
);
985 struct step_1_continuation_args
988 int skip_subroutines
;
993 /* Called after we are done with one step operation, to check whether
994 we need to step again, before we print the prompt and return control
995 to the user. If count is > 1, we will need to do one more call to
996 proceed(), via step_once(). Basically it is like step_once and
997 step_1_continuation are co-recursive. */
1000 step_1_continuation (void *args
, int err
)
1002 struct step_1_continuation_args
*a
= args
;
1004 if (target_has_execution
)
1006 struct thread_info
*tp
;
1008 tp
= inferior_thread ();
1010 && tp
->step_multi
&& tp
->control
.stop_step
)
1012 /* There are more steps to make, and we did stop due to
1013 ending a stepping range. Do another step. */
1014 step_once (a
->skip_subroutines
, a
->single_inst
,
1015 a
->count
- 1, a
->thread
);
1021 /* We either hit an error, or stopped for some reason that is
1022 not stepping, or there are no further steps to make.
1024 if (!a
->single_inst
|| a
->skip_subroutines
)
1025 delete_longjmp_breakpoint (a
->thread
);
1028 /* Do just one step operation. This is useful to implement the 'step
1029 n' kind of commands. In case of asynchronous targets, we will have
1030 to set up a continuation to be done after the target stops (after
1031 this one step). For synch targets, the caller handles further
1035 step_once (int skip_subroutines
, int single_inst
, int count
, int thread
)
1037 struct frame_info
*frame
= get_current_frame ();
1041 /* Don't assume THREAD is a valid thread id. It is set to -1 if
1042 the longjmp breakpoint was not required. Use the
1043 INFERIOR_PTID thread instead, which is the same thread when
1045 struct thread_info
*tp
= inferior_thread ();
1047 clear_proceed_status (!skip_subroutines
);
1054 /* Step at an inlined function behaves like "down". */
1055 if (!skip_subroutines
1056 && inline_skipped_frames (inferior_ptid
))
1060 /* Pretend that we've ran. */
1061 resume_ptid
= user_visible_resume_ptid (1);
1062 set_running (resume_ptid
, 1);
1064 step_into_inline_frame (inferior_ptid
);
1066 step_once (skip_subroutines
, single_inst
, count
- 1, thread
);
1069 /* Pretend that we've stopped. */
1072 if (target_can_async_p ())
1073 inferior_event_handler (INF_EXEC_COMPLETE
, NULL
);
1078 pc
= get_frame_pc (frame
);
1079 find_pc_line_pc_range (pc
,
1080 &tp
->control
.step_range_start
,
1081 &tp
->control
.step_range_end
);
1083 tp
->control
.may_range_step
= 1;
1085 /* If we have no line info, switch to stepi mode. */
1086 if (tp
->control
.step_range_end
== 0 && step_stop_if_no_debug
)
1088 tp
->control
.step_range_start
= tp
->control
.step_range_end
= 1;
1089 tp
->control
.may_range_step
= 0;
1091 else if (tp
->control
.step_range_end
== 0)
1095 if (find_pc_partial_function (pc
, &name
,
1096 &tp
->control
.step_range_start
,
1097 &tp
->control
.step_range_end
) == 0)
1098 error (_("Cannot find bounds of current function"));
1100 target_terminal_ours ();
1101 printf_filtered (_("Single stepping until exit from function %s,"
1102 "\nwhich has no line number information.\n"),
1108 /* Say we are stepping, but stop after one insn whatever it does. */
1109 tp
->control
.step_range_start
= tp
->control
.step_range_end
= 1;
1110 if (!skip_subroutines
)
1112 Don't step over function calls, not even to functions lacking
1114 tp
->control
.step_over_calls
= STEP_OVER_NONE
;
1117 if (skip_subroutines
)
1118 tp
->control
.step_over_calls
= STEP_OVER_ALL
;
1120 tp
->step_multi
= (count
> 1);
1121 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
, 1);
1123 /* For async targets, register a continuation to do any
1124 additional steps. For sync targets, the caller will handle
1125 further stepping. */
1126 if (target_can_async_p ())
1128 struct step_1_continuation_args
*args
;
1130 args
= xmalloc (sizeof (*args
));
1131 args
->skip_subroutines
= skip_subroutines
;
1132 args
->single_inst
= single_inst
;
1133 args
->count
= count
;
1134 args
->thread
= thread
;
1136 add_intermediate_continuation (tp
, step_1_continuation
, args
, xfree
);
1142 /* Continue program at specified address. */
1145 jump_command (char *arg
, int from_tty
)
1147 struct gdbarch
*gdbarch
= get_current_arch ();
1149 struct symtabs_and_lines sals
;
1150 struct symtab_and_line sal
;
1154 struct cleanup
*args_chain
;
1157 ensure_not_tfind_mode ();
1158 ensure_valid_thread ();
1159 ensure_not_running ();
1161 /* Find out whether we must run in the background. */
1162 arg
= strip_bg_char (arg
, &async_exec
);
1163 args_chain
= make_cleanup (xfree
, arg
);
1165 prepare_execution_command (¤t_target
, async_exec
);
1168 error_no_arg (_("starting address"));
1170 sals
= decode_line_with_last_displayed (arg
, DECODE_LINE_FUNFIRSTLINE
);
1171 if (sals
.nelts
!= 1)
1173 error (_("Unreasonable jump request"));
1179 /* Done with ARGS. */
1180 do_cleanups (args_chain
);
1182 if (sal
.symtab
== 0 && sal
.pc
== 0)
1183 error (_("No source file has been specified."));
1185 resolve_sal_pc (&sal
); /* May error out. */
1187 /* See if we are trying to jump to another function. */
1188 fn
= get_frame_function (get_current_frame ());
1189 sfn
= find_pc_function (sal
.pc
);
1190 if (fn
!= NULL
&& sfn
!= fn
)
1192 if (!query (_("Line %d is not in `%s'. Jump anyway? "), sal
.line
,
1193 SYMBOL_PRINT_NAME (fn
)))
1195 error (_("Not confirmed."));
1202 struct obj_section
*section
;
1204 fixup_symbol_section (sfn
, 0);
1205 section
= SYMBOL_OBJ_SECTION (symbol_objfile (sfn
), sfn
);
1206 if (section_is_overlay (section
)
1207 && !section_is_mapped (section
))
1209 if (!query (_("WARNING!!! Destination is in "
1210 "unmapped overlay! Jump anyway? ")))
1212 error (_("Not confirmed."));
1222 printf_filtered (_("Continuing at "));
1223 fputs_filtered (paddress (gdbarch
, addr
), gdb_stdout
);
1224 printf_filtered (".\n");
1227 clear_proceed_status (0);
1228 proceed (addr
, GDB_SIGNAL_0
, 0);
1232 /* Go to line or address in current procedure. */
1235 go_command (char *line_no
, int from_tty
)
1237 if (line_no
== (char *) NULL
|| !*line_no
)
1238 printf_filtered (_("Usage: go <location>\n"));
1241 tbreak_command (line_no
, from_tty
);
1242 jump_command (line_no
, from_tty
);
1247 /* Continue program giving it specified signal. */
1250 signal_command (char *signum_exp
, int from_tty
)
1252 enum gdb_signal oursig
;
1254 struct cleanup
*args_chain
;
1256 dont_repeat (); /* Too dangerous. */
1258 ensure_not_tfind_mode ();
1259 ensure_valid_thread ();
1260 ensure_not_running ();
1262 /* Find out whether we must run in the background. */
1263 signum_exp
= strip_bg_char (signum_exp
, &async_exec
);
1264 args_chain
= make_cleanup (xfree
, signum_exp
);
1266 prepare_execution_command (¤t_target
, async_exec
);
1269 error_no_arg (_("signal number"));
1271 /* It would be even slicker to make signal names be valid expressions,
1272 (the type could be "enum $signal" or some such), then the user could
1273 assign them to convenience variables. */
1274 oursig
= gdb_signal_from_name (signum_exp
);
1276 if (oursig
== GDB_SIGNAL_UNKNOWN
)
1278 /* No, try numeric. */
1279 int num
= parse_and_eval_long (signum_exp
);
1282 oursig
= GDB_SIGNAL_0
;
1284 oursig
= gdb_signal_from_command (num
);
1287 /* Look for threads other than the current that this command ends up
1288 resuming too (due to schedlock off), and warn if they'll get a
1289 signal delivered. "signal 0" is used to suppress a previous
1290 signal, but if the current thread is no longer the one that got
1291 the signal, then the user is potentially suppressing the signal
1292 of the wrong thread. */
1295 struct thread_info
*tp
;
1297 int must_confirm
= 0;
1299 /* This indicates what will be resumed. Either a single thread,
1300 a whole process, or all threads of all processes. */
1301 resume_ptid
= user_visible_resume_ptid (0);
1303 ALL_NON_EXITED_THREADS (tp
)
1305 if (ptid_equal (tp
->ptid
, inferior_ptid
))
1307 if (!ptid_match (tp
->ptid
, resume_ptid
))
1310 if (tp
->suspend
.stop_signal
!= GDB_SIGNAL_0
1311 && signal_pass_state (tp
->suspend
.stop_signal
))
1314 printf_unfiltered (_("Note:\n"));
1315 printf_unfiltered (_(" Thread %d previously stopped with signal %s, %s.\n"),
1317 gdb_signal_to_name (tp
->suspend
.stop_signal
),
1318 gdb_signal_to_string (tp
->suspend
.stop_signal
));
1324 && !query (_("Continuing thread %d (the current thread) with specified signal will\n"
1325 "still deliver the signals noted above to their respective threads.\n"
1326 "Continue anyway? "),
1327 inferior_thread ()->num
))
1328 error (_("Not confirmed."));
1333 if (oursig
== GDB_SIGNAL_0
)
1334 printf_filtered (_("Continuing with no signal.\n"));
1336 printf_filtered (_("Continuing with signal %s.\n"),
1337 gdb_signal_to_name (oursig
));
1340 clear_proceed_status (0);
1341 proceed ((CORE_ADDR
) -1, oursig
, 0);
1344 /* Queue a signal to be delivered to the current thread. */
1347 queue_signal_command (char *signum_exp
, int from_tty
)
1349 enum gdb_signal oursig
;
1350 struct thread_info
*tp
;
1353 ensure_not_tfind_mode ();
1354 ensure_valid_thread ();
1355 ensure_not_running ();
1357 if (signum_exp
== NULL
)
1358 error_no_arg (_("signal number"));
1360 /* It would be even slicker to make signal names be valid expressions,
1361 (the type could be "enum $signal" or some such), then the user could
1362 assign them to convenience variables. */
1363 oursig
= gdb_signal_from_name (signum_exp
);
1365 if (oursig
== GDB_SIGNAL_UNKNOWN
)
1367 /* No, try numeric. */
1368 int num
= parse_and_eval_long (signum_exp
);
1371 oursig
= GDB_SIGNAL_0
;
1373 oursig
= gdb_signal_from_command (num
);
1376 if (oursig
!= GDB_SIGNAL_0
1377 && !signal_pass_state (oursig
))
1378 error (_("Signal handling set to not pass this signal to the program."));
1380 tp
= inferior_thread ();
1381 tp
->suspend
.stop_signal
= oursig
;
1384 /* Continuation args to be passed to the "until" command
1386 struct until_next_continuation_args
1388 /* The thread that was current when the command was executed. */
1392 /* A continuation callback for until_next_command. */
1395 until_next_continuation (void *arg
, int err
)
1397 struct until_next_continuation_args
*a
= arg
;
1399 delete_longjmp_breakpoint (a
->thread
);
1402 /* Proceed until we reach a different source line with pc greater than
1403 our current one or exit the function. We skip calls in both cases.
1405 Note that eventually this command should probably be changed so
1406 that only source lines are printed out when we hit the breakpoint
1407 we set. This may involve changes to wait_for_inferior and the
1408 proceed status code. */
1411 until_next_command (int from_tty
)
1413 struct frame_info
*frame
;
1415 struct symbol
*func
;
1416 struct symtab_and_line sal
;
1417 struct thread_info
*tp
= inferior_thread ();
1418 int thread
= tp
->num
;
1419 struct cleanup
*old_chain
;
1421 clear_proceed_status (0);
1424 frame
= get_current_frame ();
1426 /* Step until either exited from this function or greater
1427 than the current line (if in symbolic section) or pc (if
1430 pc
= get_frame_pc (frame
);
1431 func
= find_pc_function (pc
);
1435 struct bound_minimal_symbol msymbol
= lookup_minimal_symbol_by_pc (pc
);
1437 if (msymbol
.minsym
== NULL
)
1438 error (_("Execution is not within a known function."));
1440 tp
->control
.step_range_start
= BMSYMBOL_VALUE_ADDRESS (msymbol
);
1441 /* The upper-bound of step_range is exclusive. In order to make PC
1442 within the range, set the step_range_end with PC + 1. */
1443 tp
->control
.step_range_end
= pc
+ 1;
1447 sal
= find_pc_line (pc
, 0);
1449 tp
->control
.step_range_start
= BLOCK_START (SYMBOL_BLOCK_VALUE (func
));
1450 tp
->control
.step_range_end
= sal
.end
;
1452 tp
->control
.may_range_step
= 1;
1454 tp
->control
.step_over_calls
= STEP_OVER_ALL
;
1456 tp
->step_multi
= 0; /* Only one call to proceed */
1458 set_longjmp_breakpoint (tp
, get_frame_id (frame
));
1459 old_chain
= make_cleanup (delete_longjmp_breakpoint_cleanup
, &thread
);
1461 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
, 1);
1463 if (target_can_async_p () && is_running (inferior_ptid
))
1465 struct until_next_continuation_args
*cont_args
;
1467 discard_cleanups (old_chain
);
1468 cont_args
= XNEW (struct until_next_continuation_args
);
1469 cont_args
->thread
= inferior_thread ()->num
;
1471 add_continuation (tp
, until_next_continuation
, cont_args
, xfree
);
1474 do_cleanups (old_chain
);
1478 until_command (char *arg
, int from_tty
)
1481 struct cleanup
*args_chain
;
1484 ensure_not_tfind_mode ();
1485 ensure_valid_thread ();
1486 ensure_not_running ();
1488 /* Find out whether we must run in the background. */
1489 arg
= strip_bg_char (arg
, &async_exec
);
1490 args_chain
= make_cleanup (xfree
, arg
);
1492 prepare_execution_command (¤t_target
, async_exec
);
1495 until_break_command (arg
, from_tty
, 0);
1497 until_next_command (from_tty
);
1499 /* Done with ARGS. */
1500 do_cleanups (args_chain
);
1504 advance_command (char *arg
, int from_tty
)
1507 struct cleanup
*args_chain
;
1510 ensure_not_tfind_mode ();
1511 ensure_valid_thread ();
1512 ensure_not_running ();
1515 error_no_arg (_("a location"));
1517 /* Find out whether we must run in the background. */
1518 arg
= strip_bg_char (arg
, &async_exec
);
1519 args_chain
= make_cleanup (xfree
, arg
);
1521 prepare_execution_command (¤t_target
, async_exec
);
1523 until_break_command (arg
, from_tty
, 1);
1525 /* Done with ARGS. */
1526 do_cleanups (args_chain
);
1529 /* Return the value of the result of a function at the end of a 'finish'
1533 get_return_value (struct value
*function
, struct type
*value_type
)
1535 struct regcache
*stop_regs
= stop_registers
;
1536 struct gdbarch
*gdbarch
;
1537 struct value
*value
;
1538 struct cleanup
*cleanup
= make_cleanup (null_cleanup
, NULL
);
1540 /* If stop_registers were not saved, use the current registers. */
1543 stop_regs
= regcache_dup (get_current_regcache ());
1544 make_cleanup_regcache_xfree (stop_regs
);
1547 gdbarch
= get_regcache_arch (stop_regs
);
1549 CHECK_TYPEDEF (value_type
);
1550 gdb_assert (TYPE_CODE (value_type
) != TYPE_CODE_VOID
);
1552 /* FIXME: 2003-09-27: When returning from a nested inferior function
1553 call, it's possible (with no help from the architecture vector)
1554 to locate and return/print a "struct return" value. This is just
1555 a more complicated case of what is already being done in the
1556 inferior function call code. In fact, when inferior function
1557 calls are made async, this will likely be made the norm. */
1559 switch (gdbarch_return_value (gdbarch
, function
, value_type
,
1562 case RETURN_VALUE_REGISTER_CONVENTION
:
1563 case RETURN_VALUE_ABI_RETURNS_ADDRESS
:
1564 case RETURN_VALUE_ABI_PRESERVES_ADDRESS
:
1565 value
= allocate_value (value_type
);
1566 gdbarch_return_value (gdbarch
, function
, value_type
, stop_regs
,
1567 value_contents_raw (value
), NULL
);
1569 case RETURN_VALUE_STRUCT_CONVENTION
:
1573 internal_error (__FILE__
, __LINE__
, _("bad switch"));
1576 do_cleanups (cleanup
);
1581 /* Print the result of a function at the end of a 'finish' command. */
1584 print_return_value (struct value
*function
, struct type
*value_type
)
1586 struct value
*value
= get_return_value (function
, value_type
);
1587 struct ui_out
*uiout
= current_uiout
;
1591 struct value_print_options opts
;
1592 struct ui_file
*stb
;
1593 struct cleanup
*old_chain
;
1596 stb
= mem_fileopen ();
1597 old_chain
= make_cleanup_ui_file_delete (stb
);
1598 ui_out_text (uiout
, "Value returned is ");
1599 ui_out_field_fmt (uiout
, "gdb-result-var", "$%d",
1600 record_latest_value (value
));
1601 ui_out_text (uiout
, " = ");
1602 get_no_prettyformat_print_options (&opts
);
1603 value_print (value
, stb
, &opts
);
1604 ui_out_field_stream (uiout
, "return-value", stb
);
1605 ui_out_text (uiout
, "\n");
1606 do_cleanups (old_chain
);
1610 struct cleanup
*oldchain
;
1613 type_name
= type_to_string (value_type
);
1614 oldchain
= make_cleanup (xfree
, type_name
);
1615 ui_out_text (uiout
, "Value returned has type: ");
1616 ui_out_field_string (uiout
, "return-type", type_name
);
1617 ui_out_text (uiout
, ".");
1618 ui_out_text (uiout
, " Cannot determine contents\n");
1619 do_cleanups (oldchain
);
1623 /* Stuff that needs to be done by the finish command after the target
1624 has stopped. In asynchronous mode, we wait for the target to stop
1625 in the call to poll or select in the event loop, so it is
1626 impossible to do all the stuff as part of the finish_command
1627 function itself. The only chance we have to complete this command
1628 is in fetch_inferior_event, which is called by the event loop as
1629 soon as it detects that the target has stopped. */
1631 struct finish_command_continuation_args
1633 /* The thread that as current when the command was executed. */
1635 struct breakpoint
*breakpoint
;
1636 struct symbol
*function
;
1640 finish_command_continuation (void *arg
, int err
)
1642 struct finish_command_continuation_args
*a
= arg
;
1646 struct thread_info
*tp
= NULL
;
1649 if (!ptid_equal (inferior_ptid
, null_ptid
)
1650 && target_has_execution
1651 && is_stopped (inferior_ptid
))
1653 tp
= inferior_thread ();
1654 bs
= tp
->control
.stop_bpstat
;
1657 if (bpstat_find_breakpoint (bs
, a
->breakpoint
) != NULL
1658 && a
->function
!= NULL
)
1660 struct type
*value_type
;
1662 value_type
= TYPE_TARGET_TYPE (SYMBOL_TYPE (a
->function
));
1664 internal_error (__FILE__
, __LINE__
,
1665 _("finish_command: function has no target type"));
1667 if (TYPE_CODE (value_type
) != TYPE_CODE_VOID
)
1669 volatile struct gdb_exception ex
;
1672 func
= read_var_value (a
->function
, get_current_frame ());
1673 TRY_CATCH (ex
, RETURN_MASK_ALL
)
1675 /* print_return_value can throw an exception in some
1676 circumstances. We need to catch this so that we still
1677 delete the breakpoint. */
1678 print_return_value (func
, value_type
);
1681 exception_print (gdb_stdout
, ex
);
1685 /* We suppress normal call of normal_stop observer and do it
1686 here so that the *stopped notification includes the return
1688 if (bs
!= NULL
&& tp
->control
.proceed_to_finish
)
1689 observer_notify_normal_stop (bs
, 1 /* print frame */);
1692 delete_breakpoint (a
->breakpoint
);
1693 delete_longjmp_breakpoint (a
->thread
);
1697 finish_command_continuation_free_arg (void *arg
)
1702 /* finish_backward -- helper function for finish_command. */
1705 finish_backward (struct symbol
*function
)
1707 struct symtab_and_line sal
;
1708 struct thread_info
*tp
= inferior_thread ();
1710 CORE_ADDR func_addr
;
1712 pc
= get_frame_pc (get_current_frame ());
1714 if (find_pc_partial_function (pc
, NULL
, &func_addr
, NULL
) == 0)
1715 error (_("Cannot find bounds of current function"));
1717 sal
= find_pc_line (func_addr
, 0);
1719 tp
->control
.proceed_to_finish
= 1;
1720 /* Special case: if we're sitting at the function entry point,
1721 then all we need to do is take a reverse singlestep. We
1722 don't need to set a breakpoint, and indeed it would do us
1725 Note that this can only happen at frame #0, since there's
1726 no way that a function up the stack can have a return address
1727 that's equal to its entry point. */
1731 struct frame_info
*frame
= get_selected_frame (NULL
);
1732 struct gdbarch
*gdbarch
= get_frame_arch (frame
);
1733 struct symtab_and_line sr_sal
;
1735 /* Set a step-resume at the function's entry point. Once that's
1736 hit, we'll do one more step backwards. */
1739 sr_sal
.pspace
= get_frame_program_space (frame
);
1740 insert_step_resume_breakpoint_at_sal (gdbarch
,
1741 sr_sal
, null_frame_id
);
1743 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
, 0);
1747 /* We're almost there -- we just need to back up by one more
1749 tp
->control
.step_range_start
= tp
->control
.step_range_end
= 1;
1750 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
, 1);
1754 /* finish_forward -- helper function for finish_command. */
1757 finish_forward (struct symbol
*function
, struct frame_info
*frame
)
1759 struct frame_id frame_id
= get_frame_id (frame
);
1760 struct gdbarch
*gdbarch
= get_frame_arch (frame
);
1761 struct symtab_and_line sal
;
1762 struct thread_info
*tp
= inferior_thread ();
1763 struct breakpoint
*breakpoint
;
1764 struct cleanup
*old_chain
;
1765 struct finish_command_continuation_args
*cargs
;
1766 int thread
= tp
->num
;
1768 sal
= find_pc_line (get_frame_pc (frame
), 0);
1769 sal
.pc
= get_frame_pc (frame
);
1771 breakpoint
= set_momentary_breakpoint (gdbarch
, sal
,
1772 get_stack_frame_id (frame
),
1775 /* set_momentary_breakpoint invalidates FRAME. */
1778 old_chain
= make_cleanup_delete_breakpoint (breakpoint
);
1780 set_longjmp_breakpoint (tp
, frame_id
);
1781 make_cleanup (delete_longjmp_breakpoint_cleanup
, &thread
);
1783 /* We want stop_registers, please... */
1784 tp
->control
.proceed_to_finish
= 1;
1785 cargs
= xmalloc (sizeof (*cargs
));
1787 cargs
->thread
= thread
;
1788 cargs
->breakpoint
= breakpoint
;
1789 cargs
->function
= function
;
1790 add_continuation (tp
, finish_command_continuation
, cargs
,
1791 finish_command_continuation_free_arg
);
1792 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
, 0);
1794 discard_cleanups (old_chain
);
1795 if (!target_can_async_p ())
1796 do_all_continuations (0);
1799 /* "finish": Set a temporary breakpoint at the place the selected
1800 frame will return to, then continue. */
1803 finish_command (char *arg
, int from_tty
)
1805 struct frame_info
*frame
;
1806 struct symbol
*function
;
1808 struct cleanup
*args_chain
;
1811 ensure_not_tfind_mode ();
1812 ensure_valid_thread ();
1813 ensure_not_running ();
1815 /* Find out whether we must run in the background. */
1816 arg
= strip_bg_char (arg
, &async_exec
);
1817 args_chain
= make_cleanup (xfree
, arg
);
1819 prepare_execution_command (¤t_target
, async_exec
);
1822 error (_("The \"finish\" command does not take any arguments."));
1824 /* Done with ARGS. */
1825 do_cleanups (args_chain
);
1827 frame
= get_prev_frame (get_selected_frame (_("No selected frame.")));
1829 error (_("\"finish\" not meaningful in the outermost frame."));
1831 clear_proceed_status (0);
1833 /* Finishing from an inline frame is completely different. We don't
1834 try to show the "return value" - no way to locate it. So we do
1835 not need a completion. */
1836 if (get_frame_type (get_selected_frame (_("No selected frame.")))
1839 /* Claim we are stepping in the calling frame. An empty step
1840 range means that we will stop once we aren't in a function
1841 called by that frame. We don't use the magic "1" value for
1842 step_range_end, because then infrun will think this is nexti,
1843 and not step over the rest of this inlined function call. */
1844 struct thread_info
*tp
= inferior_thread ();
1845 struct symtab_and_line empty_sal
;
1847 init_sal (&empty_sal
);
1848 set_step_info (frame
, empty_sal
);
1849 tp
->control
.step_range_start
= get_frame_pc (frame
);
1850 tp
->control
.step_range_end
= tp
->control
.step_range_start
;
1851 tp
->control
.step_over_calls
= STEP_OVER_ALL
;
1853 /* Print info on the selected frame, including level number but not
1857 printf_filtered (_("Run till exit from "));
1858 print_stack_frame (get_selected_frame (NULL
), 1, LOCATION
, 0);
1861 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
, 1);
1865 /* Ignore TAILCALL_FRAME type frames, they were executed already before
1866 entering THISFRAME. */
1867 while (get_frame_type (frame
) == TAILCALL_FRAME
)
1868 frame
= get_prev_frame (frame
);
1870 /* Find the function we will return from. */
1872 function
= find_pc_function (get_frame_pc (get_selected_frame (NULL
)));
1874 /* Print info on the selected frame, including level number but not
1878 if (execution_direction
== EXEC_REVERSE
)
1879 printf_filtered (_("Run back to call of "));
1882 if (function
!= NULL
&& TYPE_NO_RETURN (function
->type
)
1883 && !query (_("warning: Function %s does not return normally.\n"
1884 "Try to finish anyway? "),
1885 SYMBOL_PRINT_NAME (function
)))
1886 error (_("Not confirmed."));
1887 printf_filtered (_("Run till exit from "));
1890 print_stack_frame (get_selected_frame (NULL
), 1, LOCATION
, 0);
1893 if (execution_direction
== EXEC_REVERSE
)
1894 finish_backward (function
);
1896 finish_forward (function
, frame
);
1901 program_info (char *args
, int from_tty
)
1905 struct thread_info
*tp
;
1908 if (!target_has_execution
)
1910 printf_filtered (_("The program being debugged is not being run.\n"));
1915 ptid
= inferior_ptid
;
1918 struct target_waitstatus ws
;
1920 get_last_target_status (&ptid
, &ws
);
1923 if (ptid_equal (ptid
, null_ptid
) || is_exited (ptid
))
1924 error (_("Invalid selected thread."));
1925 else if (is_running (ptid
))
1926 error (_("Selected thread is running."));
1928 tp
= find_thread_ptid (ptid
);
1929 bs
= tp
->control
.stop_bpstat
;
1930 stat
= bpstat_num (&bs
, &num
);
1932 target_files_info ();
1933 printf_filtered (_("Program stopped at %s.\n"),
1934 paddress (target_gdbarch (), stop_pc
));
1935 if (tp
->control
.stop_step
)
1936 printf_filtered (_("It stopped after being stepped.\n"));
1939 /* There may be several breakpoints in the same place, so this
1940 isn't as strange as it seems. */
1945 printf_filtered (_("It stopped at a breakpoint "
1946 "that has since been deleted.\n"));
1949 printf_filtered (_("It stopped at breakpoint %d.\n"), num
);
1950 stat
= bpstat_num (&bs
, &num
);
1953 else if (tp
->suspend
.stop_signal
!= GDB_SIGNAL_0
)
1955 printf_filtered (_("It stopped with signal %s, %s.\n"),
1956 gdb_signal_to_name (tp
->suspend
.stop_signal
),
1957 gdb_signal_to_string (tp
->suspend
.stop_signal
));
1962 printf_filtered (_("Type \"info stack\" or \"info "
1963 "registers\" for more information.\n"));
1968 environment_info (char *var
, int from_tty
)
1972 char *val
= get_in_environ (current_inferior ()->environment
, var
);
1976 puts_filtered (var
);
1977 puts_filtered (" = ");
1978 puts_filtered (val
);
1979 puts_filtered ("\n");
1983 puts_filtered ("Environment variable \"");
1984 puts_filtered (var
);
1985 puts_filtered ("\" not defined.\n");
1990 char **vector
= environ_vector (current_inferior ()->environment
);
1994 puts_filtered (*vector
++);
1995 puts_filtered ("\n");
2001 set_environment_command (char *arg
, int from_tty
)
2003 char *p
, *val
, *var
;
2007 error_no_arg (_("environment variable and value"));
2009 /* Find seperation between variable name and value. */
2010 p
= (char *) strchr (arg
, '=');
2011 val
= (char *) strchr (arg
, ' ');
2013 if (p
!= 0 && val
!= 0)
2015 /* We have both a space and an equals. If the space is before the
2016 equals, walk forward over the spaces til we see a nonspace
2017 (possibly the equals). */
2022 /* Now if the = is after the char following the spaces,
2023 take the char following the spaces. */
2027 else if (val
!= 0 && p
== 0)
2031 error_no_arg (_("environment variable to set"));
2033 if (p
== 0 || p
[1] == 0)
2037 p
= arg
+ strlen (arg
); /* So that savestring below will work. */
2041 /* Not setting variable value to null. */
2043 while (*val
== ' ' || *val
== '\t')
2047 while (p
!= arg
&& (p
[-1] == ' ' || p
[-1] == '\t'))
2050 var
= savestring (arg
, p
- arg
);
2053 printf_filtered (_("Setting environment variable "
2054 "\"%s\" to null value.\n"),
2056 set_in_environ (current_inferior ()->environment
, var
, "");
2059 set_in_environ (current_inferior ()->environment
, var
, val
);
2064 unset_environment_command (char *var
, int from_tty
)
2068 /* If there is no argument, delete all environment variables.
2069 Ask for confirmation if reading from the terminal. */
2070 if (!from_tty
|| query (_("Delete all environment variables? ")))
2072 free_environ (current_inferior ()->environment
);
2073 current_inferior ()->environment
= make_environ ();
2077 unset_in_environ (current_inferior ()->environment
, var
);
2080 /* Handle the execution path (PATH variable). */
2082 static const char path_var_name
[] = "PATH";
2085 path_info (char *args
, int from_tty
)
2087 puts_filtered ("Executable and object file path: ");
2088 puts_filtered (get_in_environ (current_inferior ()->environment
,
2090 puts_filtered ("\n");
2093 /* Add zero or more directories to the front of the execution path. */
2096 path_command (char *dirname
, int from_tty
)
2102 env
= get_in_environ (current_inferior ()->environment
, path_var_name
);
2103 /* Can be null if path is not set. */
2106 exec_path
= xstrdup (env
);
2107 mod_path (dirname
, &exec_path
);
2108 set_in_environ (current_inferior ()->environment
, path_var_name
, exec_path
);
2111 path_info ((char *) NULL
, from_tty
);
2115 /* Print out the register NAME with value VAL, to FILE, in the default
2119 default_print_one_register_info (struct ui_file
*file
,
2123 struct type
*regtype
= value_type (val
);
2124 int print_raw_format
;
2126 fputs_filtered (name
, file
);
2127 print_spaces_filtered (15 - strlen (name
), file
);
2129 print_raw_format
= (value_entirely_available (val
)
2130 && !value_optimized_out (val
));
2132 /* If virtual format is floating, print it that way, and in raw
2134 if (TYPE_CODE (regtype
) == TYPE_CODE_FLT
2135 || TYPE_CODE (regtype
) == TYPE_CODE_DECFLOAT
)
2138 struct value_print_options opts
;
2139 const gdb_byte
*valaddr
= value_contents_for_printing (val
);
2140 enum bfd_endian byte_order
= gdbarch_byte_order (get_type_arch (regtype
));
2142 get_user_print_options (&opts
);
2146 value_contents_for_printing (val
),
2147 value_embedded_offset (val
), 0,
2148 file
, 0, val
, &opts
, current_language
);
2150 if (print_raw_format
)
2152 fprintf_filtered (file
, "\t(raw ");
2153 print_hex_chars (file
, valaddr
, TYPE_LENGTH (regtype
), byte_order
);
2154 fprintf_filtered (file
, ")");
2159 struct value_print_options opts
;
2161 /* Print the register in hex. */
2162 get_formatted_print_options (&opts
, 'x');
2165 value_contents_for_printing (val
),
2166 value_embedded_offset (val
), 0,
2167 file
, 0, val
, &opts
, current_language
);
2168 /* If not a vector register, print it also according to its
2170 if (print_raw_format
&& TYPE_VECTOR (regtype
) == 0)
2172 get_user_print_options (&opts
);
2174 fprintf_filtered (file
, "\t");
2176 value_contents_for_printing (val
),
2177 value_embedded_offset (val
), 0,
2178 file
, 0, val
, &opts
, current_language
);
2182 fprintf_filtered (file
, "\n");
2185 /* Print out the machine register regnum. If regnum is -1, print all
2186 registers (print_all == 1) or all non-float and non-vector
2187 registers (print_all == 0).
2189 For most machines, having all_registers_info() print the
2190 register(s) one per line is good enough. If a different format is
2191 required, (eg, for MIPS or Pyramid 90x, which both have lots of
2192 regs), or there is an existing convention for showing all the
2193 registers, define the architecture method PRINT_REGISTERS_INFO to
2194 provide that format. */
2197 default_print_registers_info (struct gdbarch
*gdbarch
,
2198 struct ui_file
*file
,
2199 struct frame_info
*frame
,
2200 int regnum
, int print_all
)
2203 const int numregs
= gdbarch_num_regs (gdbarch
)
2204 + gdbarch_num_pseudo_regs (gdbarch
);
2206 for (i
= 0; i
< numregs
; i
++)
2208 /* Decide between printing all regs, non-float / vector regs, or
2214 if (!gdbarch_register_reggroup_p (gdbarch
, i
, all_reggroup
))
2219 if (!gdbarch_register_reggroup_p (gdbarch
, i
, general_reggroup
))
2229 /* If the register name is empty, it is undefined for this
2230 processor, so don't display anything. */
2231 if (gdbarch_register_name (gdbarch
, i
) == NULL
2232 || *(gdbarch_register_name (gdbarch
, i
)) == '\0')
2235 default_print_one_register_info (file
,
2236 gdbarch_register_name (gdbarch
, i
),
2237 value_of_register (i
, frame
));
2242 registers_info (char *addr_exp
, int fpregs
)
2244 struct frame_info
*frame
;
2245 struct gdbarch
*gdbarch
;
2247 if (!target_has_registers
)
2248 error (_("The program has no registers now."));
2249 frame
= get_selected_frame (NULL
);
2250 gdbarch
= get_frame_arch (frame
);
2254 gdbarch_print_registers_info (gdbarch
, gdb_stdout
,
2259 while (*addr_exp
!= '\0')
2264 /* Skip leading white space. */
2265 addr_exp
= skip_spaces (addr_exp
);
2267 /* Discard any leading ``$''. Check that there is something
2268 resembling a register following it. */
2269 if (addr_exp
[0] == '$')
2271 if (isspace ((*addr_exp
)) || (*addr_exp
) == '\0')
2272 error (_("Missing register name"));
2274 /* Find the start/end of this register name/num/group. */
2276 while ((*addr_exp
) != '\0' && !isspace ((*addr_exp
)))
2280 /* Figure out what we've found and display it. */
2282 /* A register name? */
2284 int regnum
= user_reg_map_name_to_regnum (gdbarch
, start
, end
- start
);
2288 /* User registers lie completely outside of the range of
2289 normal registers. Catch them early so that the target
2291 if (regnum
>= gdbarch_num_regs (gdbarch
)
2292 + gdbarch_num_pseudo_regs (gdbarch
))
2294 struct value
*regval
= value_of_user_reg (regnum
, frame
);
2295 const char *regname
= user_reg_map_regnum_to_name (gdbarch
,
2298 /* Print in the same fashion
2299 gdbarch_print_registers_info's default
2300 implementation prints. */
2301 default_print_one_register_info (gdb_stdout
,
2306 gdbarch_print_registers_info (gdbarch
, gdb_stdout
,
2307 frame
, regnum
, fpregs
);
2312 /* A register group? */
2314 struct reggroup
*group
;
2316 for (group
= reggroup_next (gdbarch
, NULL
);
2318 group
= reggroup_next (gdbarch
, group
))
2320 /* Don't bother with a length check. Should the user
2321 enter a short register group name, go with the first
2322 group that matches. */
2323 if (strncmp (start
, reggroup_name (group
), end
- start
) == 0)
2331 regnum
< gdbarch_num_regs (gdbarch
)
2332 + gdbarch_num_pseudo_regs (gdbarch
);
2335 if (gdbarch_register_reggroup_p (gdbarch
, regnum
, group
))
2336 gdbarch_print_registers_info (gdbarch
,
2344 /* Nothing matched. */
2345 error (_("Invalid register `%.*s'"), (int) (end
- start
), start
);
2350 all_registers_info (char *addr_exp
, int from_tty
)
2352 registers_info (addr_exp
, 1);
2356 nofp_registers_info (char *addr_exp
, int from_tty
)
2358 registers_info (addr_exp
, 0);
2362 print_vector_info (struct ui_file
*file
,
2363 struct frame_info
*frame
, const char *args
)
2365 struct gdbarch
*gdbarch
= get_frame_arch (frame
);
2367 if (gdbarch_print_vector_info_p (gdbarch
))
2368 gdbarch_print_vector_info (gdbarch
, file
, frame
, args
);
2372 int printed_something
= 0;
2375 regnum
< gdbarch_num_regs (gdbarch
)
2376 + gdbarch_num_pseudo_regs (gdbarch
);
2379 if (gdbarch_register_reggroup_p (gdbarch
, regnum
, vector_reggroup
))
2381 printed_something
= 1;
2382 gdbarch_print_registers_info (gdbarch
, file
, frame
, regnum
, 1);
2385 if (!printed_something
)
2386 fprintf_filtered (file
, "No vector information\n");
2391 vector_info (char *args
, int from_tty
)
2393 if (!target_has_registers
)
2394 error (_("The program has no registers now."));
2396 print_vector_info (gdb_stdout
, get_selected_frame (NULL
), args
);
2399 /* Kill the inferior process. Make us have no inferior. */
2402 kill_command (char *arg
, int from_tty
)
2404 /* FIXME: This should not really be inferior_ptid (or target_has_execution).
2405 It should be a distinct flag that indicates that a target is active, cuz
2406 some targets don't have processes! */
2408 if (ptid_equal (inferior_ptid
, null_ptid
))
2409 error (_("The program is not being run."));
2410 if (!query (_("Kill the program being debugged? ")))
2411 error (_("Not confirmed."));
2414 /* If we still have other inferiors to debug, then don't mess with
2415 with their threads. */
2416 if (!have_inferiors ())
2418 init_thread_list (); /* Destroy thread info. */
2420 /* Killing off the inferior can leave us with a core file. If
2421 so, print the state we are left in. */
2422 if (target_has_stack
)
2424 printf_filtered (_("In %s,\n"), target_longname
);
2425 print_stack_frame (get_selected_frame (NULL
), 1, SRC_AND_LOC
, 1);
2428 bfd_cache_close_all ();
2431 /* Used in `attach&' command. ARG is a point to an integer
2432 representing a process id. Proceed threads of this process iff
2433 they stopped due to debugger request, and when they did, they
2434 reported a clean stop (GDB_SIGNAL_0). Do not proceed threads
2435 that have been explicitly been told to stop. */
2438 proceed_after_attach_callback (struct thread_info
*thread
,
2441 int pid
= * (int *) arg
;
2443 if (ptid_get_pid (thread
->ptid
) == pid
2444 && !is_exited (thread
->ptid
)
2445 && !is_executing (thread
->ptid
)
2446 && !thread
->stop_requested
2447 && thread
->suspend
.stop_signal
== GDB_SIGNAL_0
)
2449 switch_to_thread (thread
->ptid
);
2450 clear_proceed_status (0);
2451 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
, 0);
2458 proceed_after_attach (int pid
)
2460 /* Don't error out if the current thread is running, because
2461 there may be other stopped threads. */
2462 struct cleanup
*old_chain
;
2464 /* Backup current thread and selected frame. */
2465 old_chain
= make_cleanup_restore_current_thread ();
2467 iterate_over_threads (proceed_after_attach_callback
, &pid
);
2469 /* Restore selected ptid. */
2470 do_cleanups (old_chain
);
2473 /* attach_command --
2474 takes a program started up outside of gdb and ``attaches'' to it.
2475 This stops it cold in its tracks and allows us to start debugging it.
2476 and wait for the trace-trap that results from attaching. */
2479 attach_command_post_wait (char *args
, int from_tty
, int async_exec
)
2482 char *full_exec_path
= NULL
;
2483 struct inferior
*inferior
;
2485 inferior
= current_inferior ();
2486 inferior
->control
.stop_soon
= NO_STOP_QUIETLY
;
2488 /* If no exec file is yet known, try to determine it from the
2490 exec_file
= (char *) get_exec_file (0);
2493 exec_file
= target_pid_to_exec_file (ptid_get_pid (inferior_ptid
));
2496 /* It's possible we don't have a full path, but rather just a
2497 filename. Some targets, such as HP-UX, don't provide the
2500 Attempt to qualify the filename against the source path.
2501 (If that fails, we'll just fall back on the original
2502 filename. Not much more we can do...) */
2504 if (!source_full_path_of (exec_file
, &full_exec_path
))
2505 full_exec_path
= xstrdup (exec_file
);
2507 exec_file_attach (full_exec_path
, from_tty
);
2508 symbol_file_add_main (full_exec_path
, from_tty
);
2513 reopen_exec_file ();
2517 /* Take any necessary post-attaching actions for this platform. */
2518 target_post_attach (ptid_get_pid (inferior_ptid
));
2520 post_create_inferior (¤t_target
, from_tty
);
2524 /* The user requested an `attach&', so be sure to leave threads
2525 that didn't get a signal running. */
2527 /* Immediatelly resume all suspended threads of this inferior,
2528 and this inferior only. This should have no effect on
2529 already running threads. If a thread has been stopped with a
2530 signal, leave it be. */
2532 proceed_after_attach (inferior
->pid
);
2535 if (inferior_thread ()->suspend
.stop_signal
== GDB_SIGNAL_0
)
2537 clear_proceed_status (0);
2538 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
, 0);
2544 /* The user requested a plain `attach', so be sure to leave
2545 the inferior stopped. */
2547 if (target_can_async_p ())
2548 async_enable_stdin ();
2550 /* At least the current thread is already stopped. */
2552 /* In all-stop, by definition, all threads have to be already
2553 stopped at this point. In non-stop, however, although the
2554 selected thread is stopped, others may still be executing.
2555 Be sure to explicitly stop all threads of the process. This
2556 should have no effect on already stopped threads. */
2558 target_stop (pid_to_ptid (inferior
->pid
));
2560 /* Tell the user/frontend where we're stopped. */
2562 if (deprecated_attach_hook
)
2563 deprecated_attach_hook ();
2567 struct attach_command_continuation_args
2575 attach_command_continuation (void *args
, int err
)
2577 struct attach_command_continuation_args
*a
= args
;
2582 attach_command_post_wait (a
->args
, a
->from_tty
, a
->async_exec
);
2586 attach_command_continuation_free_args (void *args
)
2588 struct attach_command_continuation_args
*a
= args
;
2595 attach_command (char *args
, int from_tty
)
2598 struct cleanup
*args_chain
;
2599 struct target_ops
*attach_target
;
2601 dont_repeat (); /* Not for the faint of heart */
2603 if (gdbarch_has_global_solist (target_gdbarch ()))
2604 /* Don't complain if all processes share the same symbol
2607 else if (target_has_execution
)
2609 if (query (_("A program is being debugged already. Kill it? ")))
2612 error (_("Not killed."));
2615 /* Clean up any leftovers from other runs. Some other things from
2616 this function should probably be moved into target_pre_inferior. */
2617 target_pre_inferior (from_tty
);
2619 args
= strip_bg_char (args
, &async_exec
);
2620 args_chain
= make_cleanup (xfree
, args
);
2622 attach_target
= find_attach_target ();
2624 prepare_execution_command (attach_target
, async_exec
);
2626 if (non_stop
&& !attach_target
->to_supports_non_stop (attach_target
))
2627 error (_("Cannot attach to this target in non-stop mode"));
2629 attach_target
->to_attach (attach_target
, args
, from_tty
);
2630 /* to_attach should push the target, so after this point we
2631 shouldn't refer to attach_target again. */
2632 attach_target
= NULL
;
2634 /* Done with ARGS. */
2635 do_cleanups (args_chain
);
2637 /* Set up the "saved terminal modes" of the inferior
2638 based on what modes we are starting it with. */
2639 target_terminal_init ();
2641 /* Install inferior's terminal modes. This may look like a no-op,
2642 as we've just saved them above, however, this does more than
2643 restore terminal settings:
2645 - installs a SIGINT handler that forwards SIGINT to the inferior.
2646 Otherwise a Ctrl-C pressed just while waiting for the initial
2647 stop would end up as a spurious Quit.
2649 - removes stdin from the event loop, which we need if attaching
2650 in the foreground, otherwise on targets that report an initial
2651 stop on attach (which are most) we'd process input/commands
2652 while we're in the event loop waiting for that stop. That is,
2653 before the attach continuation runs and the command is really
2655 target_terminal_inferior ();
2657 /* Set up execution context to know that we should return from
2658 wait_for_inferior as soon as the target reports a stop. */
2659 init_wait_for_inferior ();
2660 clear_proceed_status (0);
2664 /* If we find that the current thread isn't stopped, explicitly
2665 do so now, because we're going to install breakpoints and
2669 /* The user requested an `attach&'; stop just one thread. */
2670 target_stop (inferior_ptid
);
2672 /* The user requested an `attach', so stop all threads of this
2674 target_stop (pid_to_ptid (ptid_get_pid (inferior_ptid
)));
2677 /* Some system don't generate traps when attaching to inferior.
2678 E.g. Mach 3 or GNU hurd. */
2679 if (!target_attach_no_wait
)
2681 struct inferior
*inferior
= current_inferior ();
2683 /* Careful here. See comments in inferior.h. Basically some
2684 OSes don't ignore SIGSTOPs on continue requests anymore. We
2685 need a way for handle_inferior_event to reset the stop_signal
2686 variable after an attach, and this is what
2687 STOP_QUIETLY_NO_SIGSTOP is for. */
2688 inferior
->control
.stop_soon
= STOP_QUIETLY_NO_SIGSTOP
;
2690 if (target_can_async_p ())
2692 /* sync_execution mode. Wait for stop. */
2693 struct attach_command_continuation_args
*a
;
2695 a
= xmalloc (sizeof (*a
));
2696 a
->args
= xstrdup (args
);
2697 a
->from_tty
= from_tty
;
2698 a
->async_exec
= async_exec
;
2699 add_inferior_continuation (attach_command_continuation
, a
,
2700 attach_command_continuation_free_args
);
2704 wait_for_inferior ();
2707 attach_command_post_wait (args
, from_tty
, async_exec
);
2710 /* We had just found out that the target was already attached to an
2711 inferior. PTID points at a thread of this new inferior, that is
2712 the most likely to be stopped right now, but not necessarily so.
2713 The new inferior is assumed to be already added to the inferior
2714 list at this point. If LEAVE_RUNNING, then leave the threads of
2715 this inferior running, except those we've explicitly seen reported
2719 notice_new_inferior (ptid_t ptid
, int leave_running
, int from_tty
)
2721 struct cleanup
* old_chain
;
2724 old_chain
= make_cleanup (null_cleanup
, NULL
);
2726 /* If in non-stop, leave threads as running as they were. If
2727 they're stopped for some reason other than us telling it to, the
2728 target reports a signal != GDB_SIGNAL_0. We don't try to
2729 resume threads with such a stop signal. */
2730 async_exec
= non_stop
;
2732 if (!ptid_equal (inferior_ptid
, null_ptid
))
2733 make_cleanup_restore_current_thread ();
2735 switch_to_thread (ptid
);
2737 /* When we "notice" a new inferior we need to do all the things we
2738 would normally do if we had just attached to it. */
2740 if (is_executing (inferior_ptid
))
2742 struct inferior
*inferior
= current_inferior ();
2744 /* We're going to install breakpoints, and poke at memory,
2745 ensure that the inferior is stopped for a moment while we do
2747 target_stop (inferior_ptid
);
2749 inferior
->control
.stop_soon
= STOP_QUIETLY_REMOTE
;
2751 /* Wait for stop before proceeding. */
2752 if (target_can_async_p ())
2754 struct attach_command_continuation_args
*a
;
2756 a
= xmalloc (sizeof (*a
));
2757 a
->args
= xstrdup ("");
2758 a
->from_tty
= from_tty
;
2759 a
->async_exec
= async_exec
;
2760 add_inferior_continuation (attach_command_continuation
, a
,
2761 attach_command_continuation_free_args
);
2763 do_cleanups (old_chain
);
2767 wait_for_inferior ();
2770 async_exec
= leave_running
;
2771 attach_command_post_wait ("" /* args */, from_tty
, async_exec
);
2773 do_cleanups (old_chain
);
2778 * takes a program previously attached to and detaches it.
2779 * The program resumes execution and will no longer stop
2780 * on signals, etc. We better not have left any breakpoints
2781 * in the program or it'll die when it hits one. For this
2782 * to work, it may be necessary for the process to have been
2783 * previously attached. It *might* work if the program was
2784 * started via the normal ptrace (PTRACE_TRACEME).
2788 detach_command (char *args
, int from_tty
)
2790 dont_repeat (); /* Not for the faint of heart. */
2792 if (ptid_equal (inferior_ptid
, null_ptid
))
2793 error (_("The program is not being run."));
2795 query_if_trace_running (from_tty
);
2797 disconnect_tracing ();
2799 target_detach (args
, from_tty
);
2801 /* If the solist is global across inferiors, don't clear it when we
2802 detach from a single inferior. */
2803 if (!gdbarch_has_global_solist (target_gdbarch ()))
2804 no_shared_libraries (NULL
, from_tty
);
2806 /* If we still have inferiors to debug, then don't mess with their
2808 if (!have_inferiors ())
2809 init_thread_list ();
2811 if (deprecated_detach_hook
)
2812 deprecated_detach_hook ();
2815 /* Disconnect from the current target without resuming it (leaving it
2816 waiting for a debugger).
2818 We'd better not have left any breakpoints in the program or the
2819 next debugger will get confused. Currently only supported for some
2820 remote targets, since the normal attach mechanisms don't work on
2821 stopped processes on some native platforms (e.g. GNU/Linux). */
2824 disconnect_command (char *args
, int from_tty
)
2826 dont_repeat (); /* Not for the faint of heart. */
2827 query_if_trace_running (from_tty
);
2828 disconnect_tracing ();
2829 target_disconnect (args
, from_tty
);
2830 no_shared_libraries (NULL
, from_tty
);
2831 init_thread_list ();
2832 if (deprecated_detach_hook
)
2833 deprecated_detach_hook ();
2837 interrupt_target_1 (int all_threads
)
2842 ptid
= minus_one_ptid
;
2844 ptid
= inferior_ptid
;
2847 /* Tag the thread as having been explicitly requested to stop, so
2848 other parts of gdb know not to resume this thread automatically,
2849 if it was stopped due to an internal event. Limit this to
2850 non-stop mode, as when debugging a multi-threaded application in
2851 all-stop mode, we will only get one stop event --- it's undefined
2852 which thread will report the event. */
2854 set_stop_requested (ptid
, 1);
2858 Stop the execution of the target while running in async mode, in
2859 the backgound. In all-stop, stop the whole process. In non-stop
2860 mode, stop the current thread only by default, or stop all threads
2861 if the `-a' switch is used. */
2864 interrupt_command (char *args
, int from_tty
)
2866 if (target_can_async_p ())
2868 int all_threads
= 0;
2870 dont_repeat (); /* Not for the faint of heart. */
2873 && startswith (args
, "-a"))
2876 if (!non_stop
&& all_threads
)
2877 error (_("-a is meaningless in all-stop mode."));
2879 interrupt_target_1 (all_threads
);
2883 /* See inferior.h. */
2886 default_print_float_info (struct gdbarch
*gdbarch
, struct ui_file
*file
,
2887 struct frame_info
*frame
, const char *args
)
2890 int printed_something
= 0;
2893 regnum
< gdbarch_num_regs (gdbarch
)
2894 + gdbarch_num_pseudo_regs (gdbarch
);
2897 if (gdbarch_register_reggroup_p (gdbarch
, regnum
, float_reggroup
))
2899 printed_something
= 1;
2900 gdbarch_print_registers_info (gdbarch
, file
, frame
, regnum
, 1);
2903 if (!printed_something
)
2904 fprintf_filtered (file
, "No floating-point info "
2905 "available for this processor.\n");
2909 float_info (char *args
, int from_tty
)
2911 struct frame_info
*frame
;
2913 if (!target_has_registers
)
2914 error (_("The program has no registers now."));
2916 frame
= get_selected_frame (NULL
);
2917 gdbarch_print_float_info (get_frame_arch (frame
), gdb_stdout
, frame
, args
);
2921 unset_command (char *args
, int from_tty
)
2923 printf_filtered (_("\"unset\" must be followed by the "
2924 "name of an unset subcommand.\n"));
2925 help_list (unsetlist
, "unset ", all_commands
, gdb_stdout
);
2928 /* Implement `info proc' family of commands. */
2931 info_proc_cmd_1 (char *args
, enum info_proc_what what
, int from_tty
)
2933 struct gdbarch
*gdbarch
= get_current_arch ();
2935 if (!target_info_proc (args
, what
))
2937 if (gdbarch_info_proc_p (gdbarch
))
2938 gdbarch_info_proc (gdbarch
, args
, what
);
2940 error (_("Not supported on this target."));
2944 /* Implement `info proc' when given without any futher parameters. */
2947 info_proc_cmd (char *args
, int from_tty
)
2949 info_proc_cmd_1 (args
, IP_MINIMAL
, from_tty
);
2952 /* Implement `info proc mappings'. */
2955 info_proc_cmd_mappings (char *args
, int from_tty
)
2957 info_proc_cmd_1 (args
, IP_MAPPINGS
, from_tty
);
2960 /* Implement `info proc stat'. */
2963 info_proc_cmd_stat (char *args
, int from_tty
)
2965 info_proc_cmd_1 (args
, IP_STAT
, from_tty
);
2968 /* Implement `info proc status'. */
2971 info_proc_cmd_status (char *args
, int from_tty
)
2973 info_proc_cmd_1 (args
, IP_STATUS
, from_tty
);
2976 /* Implement `info proc cwd'. */
2979 info_proc_cmd_cwd (char *args
, int from_tty
)
2981 info_proc_cmd_1 (args
, IP_CWD
, from_tty
);
2984 /* Implement `info proc cmdline'. */
2987 info_proc_cmd_cmdline (char *args
, int from_tty
)
2989 info_proc_cmd_1 (args
, IP_CMDLINE
, from_tty
);
2992 /* Implement `info proc exe'. */
2995 info_proc_cmd_exe (char *args
, int from_tty
)
2997 info_proc_cmd_1 (args
, IP_EXE
, from_tty
);
3000 /* Implement `info proc all'. */
3003 info_proc_cmd_all (char *args
, int from_tty
)
3005 info_proc_cmd_1 (args
, IP_ALL
, from_tty
);
3009 _initialize_infcmd (void)
3011 static struct cmd_list_element
*info_proc_cmdlist
;
3012 struct cmd_list_element
*c
= NULL
;
3013 const char *cmd_name
;
3015 /* Add the filename of the terminal connected to inferior I/O. */
3016 add_setshow_filename_cmd ("inferior-tty", class_run
,
3017 &inferior_io_terminal_scratch
, _("\
3018 Set terminal for future runs of program being debugged."), _("\
3019 Show terminal for future runs of program being debugged."), _("\
3020 Usage: set inferior-tty /dev/pts/1"),
3021 set_inferior_tty_command
,
3022 show_inferior_tty_command
,
3023 &setlist
, &showlist
);
3024 add_com_alias ("tty", "set inferior-tty", class_alias
, 0);
3027 add_setshow_string_noescape_cmd (cmd_name
, class_run
,
3028 &inferior_args_scratch
, _("\
3029 Set argument list to give program being debugged when it is started."), _("\
3030 Show argument list to give program being debugged when it is started."), _("\
3031 Follow this command with any number of args, to be passed to the program."),
3034 &setlist
, &showlist
);
3035 c
= lookup_cmd (&cmd_name
, setlist
, "", -1, 1);
3036 gdb_assert (c
!= NULL
);
3037 set_cmd_completer (c
, filename_completer
);
3039 c
= add_cmd ("environment", no_class
, environment_info
, _("\
3040 The environment to give the program, or one variable's value.\n\
3041 With an argument VAR, prints the value of environment variable VAR to\n\
3042 give the program being debugged. With no arguments, prints the entire\n\
3043 environment to be given to the program."), &showlist
);
3044 set_cmd_completer (c
, noop_completer
);
3046 add_prefix_cmd ("unset", no_class
, unset_command
,
3047 _("Complement to certain \"set\" commands."),
3048 &unsetlist
, "unset ", 0, &cmdlist
);
3050 c
= add_cmd ("environment", class_run
, unset_environment_command
, _("\
3051 Cancel environment variable VAR for the program.\n\
3052 This does not affect the program until the next \"run\" command."),
3054 set_cmd_completer (c
, noop_completer
);
3056 c
= add_cmd ("environment", class_run
, set_environment_command
, _("\
3057 Set environment variable value to give the program.\n\
3058 Arguments are VAR VALUE where VAR is variable name and VALUE is value.\n\
3059 VALUES of environment variables are uninterpreted strings.\n\
3060 This does not affect the program until the next \"run\" command."),
3062 set_cmd_completer (c
, noop_completer
);
3064 c
= add_com ("path", class_files
, path_command
, _("\
3065 Add directory DIR(s) to beginning of search path for object files.\n\
3066 $cwd in the path means the current working directory.\n\
3067 This path is equivalent to the $PATH shell variable. It is a list of\n\
3068 directories, separated by colons. These directories are searched to find\n\
3069 fully linked executable files and separately compiled object files as \
3071 set_cmd_completer (c
, filename_completer
);
3073 c
= add_cmd ("paths", no_class
, path_info
, _("\
3074 Current search path for finding object files.\n\
3075 $cwd in the path means the current working directory.\n\
3076 This path is equivalent to the $PATH shell variable. It is a list of\n\
3077 directories, separated by colons. These directories are searched to find\n\
3078 fully linked executable files and separately compiled object files as \
3081 set_cmd_completer (c
, noop_completer
);
3083 add_prefix_cmd ("kill", class_run
, kill_command
,
3084 _("Kill execution of program being debugged."),
3085 &killlist
, "kill ", 0, &cmdlist
);
3087 add_com ("attach", class_run
, attach_command
, _("\
3088 Attach to a process or file outside of GDB.\n\
3089 This command attaches to another target, of the same type as your last\n\
3090 \"target\" command (\"info files\" will show your target stack).\n\
3091 The command may take as argument a process id or a device file.\n\
3092 For a process id, you must have permission to send the process a signal,\n\
3093 and it must have the same effective uid as the debugger.\n\
3094 When using \"attach\" with a process id, the debugger finds the\n\
3095 program running in the process, looking first in the current working\n\
3096 directory, or (if not found there) using the source file search path\n\
3097 (see the \"directory\" command). You can also use the \"file\" command\n\
3098 to specify the program, and to load its symbol table."));
3100 add_prefix_cmd ("detach", class_run
, detach_command
, _("\
3101 Detach a process or file previously attached.\n\
3102 If a process, it is no longer traced, and it continues its execution. If\n\
3103 you were debugging a file, the file is closed and gdb no longer accesses it."),
3104 &detachlist
, "detach ", 0, &cmdlist
);
3106 add_com ("disconnect", class_run
, disconnect_command
, _("\
3107 Disconnect from a target.\n\
3108 The target will wait for another debugger to connect. Not available for\n\
3111 c
= add_com ("signal", class_run
, signal_command
, _("\
3112 Continue program with the specified signal.\n\
3113 Usage: signal SIGNAL\n\
3114 The SIGNAL argument is processed the same as the handle command.\n\
3116 An argument of \"0\" means continue the program without sending it a signal.\n\
3117 This is useful in cases where the program stopped because of a signal,\n\
3118 and you want to resume the program while discarding the signal.\n\
3120 In a multi-threaded program the signal is delivered to, or discarded from,\n\
3121 the current thread only."));
3122 set_cmd_completer (c
, signal_completer
);
3124 c
= add_com ("queue-signal", class_run
, queue_signal_command
, _("\
3125 Queue a signal to be delivered to the current thread when it is resumed.\n\
3126 Usage: queue-signal SIGNAL\n\
3127 The SIGNAL argument is processed the same as the handle command.\n\
3128 It is an error if the handling state of SIGNAL is \"nopass\".\n\
3130 An argument of \"0\" means remove any currently queued signal from\n\
3131 the current thread. This is useful in cases where the program stopped\n\
3132 because of a signal, and you want to resume it while discarding the signal.\n\
3134 In a multi-threaded program the signal is queued with, or discarded from,\n\
3135 the current thread only."));
3136 set_cmd_completer (c
, signal_completer
);
3138 add_com ("stepi", class_run
, stepi_command
, _("\
3139 Step one instruction exactly.\n\
3141 Argument N means step N times (or till program stops for another \
3143 add_com_alias ("si", "stepi", class_alias
, 0);
3145 add_com ("nexti", class_run
, nexti_command
, _("\
3146 Step one instruction, but proceed through subroutine calls.\n\
3148 Argument N means step N times (or till program stops for another \
3150 add_com_alias ("ni", "nexti", class_alias
, 0);
3152 add_com ("finish", class_run
, finish_command
, _("\
3153 Execute until selected stack frame returns.\n\
3155 Upon return, the value returned is printed and put in the value history."));
3156 add_com_alias ("fin", "finish", class_run
, 1);
3158 add_com ("next", class_run
, next_command
, _("\
3159 Step program, proceeding through subroutine calls.\n\
3161 Unlike \"step\", if the current source line calls a subroutine,\n\
3162 this command does not enter the subroutine, but instead steps over\n\
3163 the call, in effect treating it as a single source line."));
3164 add_com_alias ("n", "next", class_run
, 1);
3166 add_com_alias ("S", "next", class_run
, 1);
3168 add_com ("step", class_run
, step_command
, _("\
3169 Step program until it reaches a different source line.\n\
3171 Argument N means step N times (or till program stops for another \
3173 add_com_alias ("s", "step", class_run
, 1);
3175 c
= add_com ("until", class_run
, until_command
, _("\
3176 Execute until the program reaches a source line greater than the current\n\
3177 or a specified location (same args as break command) within the current \
3179 set_cmd_completer (c
, location_completer
);
3180 add_com_alias ("u", "until", class_run
, 1);
3182 c
= add_com ("advance", class_run
, advance_command
, _("\
3183 Continue the program up to the given location (same form as args for break \
3185 Execution will also stop upon exit from the current stack frame."));
3186 set_cmd_completer (c
, location_completer
);
3188 c
= add_com ("jump", class_run
, jump_command
, _("\
3189 Continue program being debugged at specified line or address.\n\
3190 Usage: jump <location>\n\
3191 Give as argument either LINENUM or *ADDR, where ADDR is an expression\n\
3192 for an address to start at."));
3193 set_cmd_completer (c
, location_completer
);
3194 add_com_alias ("j", "jump", class_run
, 1);
3198 c
= add_com ("go", class_run
, go_command
, _("\
3199 Usage: go <location>\n\
3200 Continue program being debugged, stopping at specified line or \n\
3202 Give as argument either LINENUM or *ADDR, where ADDR is an \n\
3203 expression for an address to start at.\n\
3204 This command is a combination of tbreak and jump."));
3205 set_cmd_completer (c
, location_completer
);
3209 add_com_alias ("g", "go", class_run
, 1);
3211 add_com ("continue", class_run
, continue_command
, _("\
3212 Continue program being debugged, after signal or breakpoint.\n\
3213 Usage: continue [N]\n\
3214 If proceeding from breakpoint, a number N may be used as an argument,\n\
3215 which means to set the ignore count of that breakpoint to N - 1 (so that\n\
3216 the breakpoint won't break until the Nth time it is reached).\n\
3218 If non-stop mode is enabled, continue only the current thread,\n\
3219 otherwise all the threads in the program are continued. To \n\
3220 continue all stopped threads in non-stop mode, use the -a option.\n\
3221 Specifying -a and an ignore count simultaneously is an error."));
3222 add_com_alias ("c", "cont", class_run
, 1);
3223 add_com_alias ("fg", "cont", class_run
, 1);
3225 c
= add_com ("run", class_run
, run_command
, _("\
3226 Start debugged program. You may specify arguments to give it.\n\
3227 Args may include \"*\", or \"[...]\"; they are expanded using \"sh\".\n\
3228 Input and output redirection with \">\", \"<\", or \">>\" are also \
3230 With no arguments, uses arguments last specified (with \"run\" \
3231 or \"set args\").\n\
3232 To cancel previous arguments and run with no arguments,\n\
3233 use \"set args\" without arguments."));
3234 set_cmd_completer (c
, filename_completer
);
3235 add_com_alias ("r", "run", class_run
, 1);
3237 add_com ("R", class_run
, run_no_args_command
,
3238 _("Start debugged program with no arguments."));
3240 c
= add_com ("start", class_run
, start_command
, _("\
3241 Run the debugged program until the beginning of the main procedure.\n\
3242 You may specify arguments to give to your program, just as with the\n\
3243 \"run\" command."));
3244 set_cmd_completer (c
, filename_completer
);
3246 add_com ("interrupt", class_run
, interrupt_command
,
3247 _("Interrupt the execution of the debugged program.\n\
3248 If non-stop mode is enabled, interrupt only the current thread,\n\
3249 otherwise all the threads in the program are stopped. To \n\
3250 interrupt all running threads in non-stop mode, use the -a option."));
3252 c
= add_info ("registers", nofp_registers_info
, _("\
3253 List of integer registers and their contents, for selected stack frame.\n\
3254 Register name as argument means describe only that register."));
3255 add_info_alias ("r", "registers", 1);
3256 set_cmd_completer (c
, reg_or_group_completer
);
3260 c
= add_com ("lr", class_info
, nofp_registers_info
, _("\
3261 List of integer registers and their contents, for selected stack frame.\n\
3262 Register name as argument means describe only that register."));
3263 set_cmd_completer (c
, reg_or_group_completer
);
3266 c
= add_info ("all-registers", all_registers_info
, _("\
3267 List of all registers and their contents, for selected stack frame.\n\
3268 Register name as argument means describe only that register."));
3269 set_cmd_completer (c
, reg_or_group_completer
);
3271 add_info ("program", program_info
,
3272 _("Execution status of the program."));
3274 add_info ("float", float_info
,
3275 _("Print the status of the floating point unit\n"));
3277 add_info ("vector", vector_info
,
3278 _("Print the status of the vector unit\n"));
3280 add_prefix_cmd ("proc", class_info
, info_proc_cmd
,
3282 Show /proc process information about any running process.\n\
3283 Specify any process id, or use the program being debugged by default."),
3284 &info_proc_cmdlist
, "info proc ",
3285 1/*allow-unknown*/, &infolist
);
3287 add_cmd ("mappings", class_info
, info_proc_cmd_mappings
, _("\
3288 List of mapped memory regions."),
3289 &info_proc_cmdlist
);
3291 add_cmd ("stat", class_info
, info_proc_cmd_stat
, _("\
3292 List process info from /proc/PID/stat."),
3293 &info_proc_cmdlist
);
3295 add_cmd ("status", class_info
, info_proc_cmd_status
, _("\
3296 List process info from /proc/PID/status."),
3297 &info_proc_cmdlist
);
3299 add_cmd ("cwd", class_info
, info_proc_cmd_cwd
, _("\
3300 List current working directory of the process."),
3301 &info_proc_cmdlist
);
3303 add_cmd ("cmdline", class_info
, info_proc_cmd_cmdline
, _("\
3304 List command line arguments of the process."),
3305 &info_proc_cmdlist
);
3307 add_cmd ("exe", class_info
, info_proc_cmd_exe
, _("\
3308 List absolute filename for executable of the process."),
3309 &info_proc_cmdlist
);
3311 add_cmd ("all", class_info
, info_proc_cmd_all
, _("\
3312 List all available /proc info."),
3313 &info_proc_cmdlist
);