1 /* Memory-access and commands for "inferior" process, for GDB.
3 Copyright (C) 1986-2017 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 #include "thread-fsm.h"
62 /* Local functions: */
64 static void nofp_registers_info (char *, int);
66 static void until_next_command (int);
68 static void until_command (char *, int);
70 static void path_info (char *, int);
72 static void path_command (char *, int);
74 static void unset_command (char *, int);
76 static void float_info (char *, int);
78 static void disconnect_command (char *, int);
80 static void unset_environment_command (char *, int);
82 static void set_environment_command (char *, int);
84 static void environment_info (char *, int);
86 static void program_info (char *, int);
88 static void finish_command (char *, int);
90 static void signal_command (char *, int);
92 static void jump_command (char *, int);
94 static void step_1 (int, int, char *);
96 static void next_command (char *, int);
98 static void step_command (char *, int);
100 static void run_command (char *, int);
102 void _initialize_infcmd (void);
104 #define ERROR_NO_INFERIOR \
105 if (!target_has_execution) error (_("The program is not being run."));
107 /* Scratch area where string containing arguments to give to the
108 program will be stored by 'set args'. As soon as anything is
109 stored, notice_args_set will move it into per-inferior storage.
110 Arguments are separated by spaces. Empty string (pointer to '\0')
113 static char *inferior_args_scratch
;
115 /* Scratch area where 'set inferior-tty' will store user-provided value.
116 We'll immediate copy it into per-inferior storage. */
118 static char *inferior_io_terminal_scratch
;
120 /* Pid of our debugged inferior, or 0 if no inferior now.
121 Since various parts of infrun.c test this to see whether there is a program
122 being debugged it should be nonzero (currently 3 is used) for remote
125 ptid_t inferior_ptid
;
127 /* Address at which inferior stopped. */
131 /* Nonzero if stopped due to completion of a stack dummy routine. */
133 enum stop_stack_kind stop_stack_dummy
;
135 /* Nonzero if stopped due to a random (unexpected) signal in inferior
138 int stopped_by_random_signal
;
140 /* See inferior.h. */
142 int startup_with_shell
= 1;
145 /* Accessor routines. */
147 /* Set the io terminal for the current inferior. Ownership of
148 TERMINAL_NAME is not transferred. */
151 set_inferior_io_terminal (const char *terminal_name
)
153 xfree (current_inferior ()->terminal
);
155 if (terminal_name
!= NULL
&& *terminal_name
!= '\0')
156 current_inferior ()->terminal
= xstrdup (terminal_name
);
158 current_inferior ()->terminal
= NULL
;
162 get_inferior_io_terminal (void)
164 return current_inferior ()->terminal
;
168 set_inferior_tty_command (char *args
, int from_tty
,
169 struct cmd_list_element
*c
)
171 /* CLI has assigned the user-provided value to inferior_io_terminal_scratch.
172 Now route it to current inferior. */
173 set_inferior_io_terminal (inferior_io_terminal_scratch
);
177 show_inferior_tty_command (struct ui_file
*file
, int from_tty
,
178 struct cmd_list_element
*c
, const char *value
)
180 /* Note that we ignore the passed-in value in favor of computing it
182 const char *inferior_io_terminal
= get_inferior_io_terminal ();
184 if (inferior_io_terminal
== NULL
)
185 inferior_io_terminal
= "";
186 fprintf_filtered (gdb_stdout
,
187 _("Terminal for future runs of program being debugged "
188 "is \"%s\".\n"), inferior_io_terminal
);
192 get_inferior_args (void)
194 if (current_inferior ()->argc
!= 0)
198 n
= construct_inferior_arguments (current_inferior ()->argc
,
199 current_inferior ()->argv
);
200 set_inferior_args (n
);
204 if (current_inferior ()->args
== NULL
)
205 current_inferior ()->args
= xstrdup ("");
207 return current_inferior ()->args
;
210 /* Set the arguments for the current inferior. Ownership of
211 NEWARGS is not transferred. */
214 set_inferior_args (char *newargs
)
216 xfree (current_inferior ()->args
);
217 current_inferior ()->args
= newargs
? xstrdup (newargs
) : NULL
;
218 current_inferior ()->argc
= 0;
219 current_inferior ()->argv
= 0;
223 set_inferior_args_vector (int argc
, char **argv
)
225 current_inferior ()->argc
= argc
;
226 current_inferior ()->argv
= argv
;
229 /* Notice when `set args' is run. */
232 set_args_command (char *args
, int from_tty
, struct cmd_list_element
*c
)
234 /* CLI has assigned the user-provided value to inferior_args_scratch.
235 Now route it to current inferior. */
236 set_inferior_args (inferior_args_scratch
);
239 /* Notice when `show args' is run. */
242 show_args_command (struct ui_file
*file
, int from_tty
,
243 struct cmd_list_element
*c
, const char *value
)
245 /* Note that we ignore the passed-in value in favor of computing it
247 deprecated_show_value_hack (file
, from_tty
, c
, get_inferior_args ());
251 /* Compute command-line string given argument vector. This does the
252 same shell processing as fork_inferior. */
255 construct_inferior_arguments (int argc
, char **argv
)
259 if (startup_with_shell
)
262 /* This holds all the characters considered special to the
264 static const char special
[] = "\"!&*|[]{}<>?`~^=;, \t\n";
265 static const char quote
= '"';
267 /* This holds all the characters considered special to the
268 typical Unix shells. We include `^' because the SunOS
269 /bin/sh treats it as a synonym for `|'. */
270 static const char special
[] = "\"!#$&*()\\|[]{}<>?'`~^; \t\n";
271 static const char quote
= '\'';
277 /* We over-compute the size. It shouldn't matter. */
278 for (i
= 0; i
< argc
; ++i
)
279 length
+= 3 * strlen (argv
[i
]) + 1 + 2 * (argv
[i
][0] == '\0');
281 result
= (char *) xmalloc (length
);
284 for (i
= 0; i
< argc
; ++i
)
289 /* Need to handle empty arguments specially. */
290 if (argv
[i
][0] == '\0')
300 if (strpbrk (argv
[i
], special
))
306 for (cp
= argv
[i
]; *cp
; ++cp
)
310 /* A newline cannot be quoted with a backslash (it
311 just disappears), only by putting it inside
322 if (strchr (special
, *cp
) != NULL
)
338 /* In this case we can't handle arguments that contain spaces,
339 tabs, or newlines -- see breakup_args(). */
343 for (i
= 0; i
< argc
; ++i
)
345 char *cp
= strchr (argv
[i
], ' ');
347 cp
= strchr (argv
[i
], '\t');
349 cp
= strchr (argv
[i
], '\n');
351 error (_("can't handle command-line "
352 "argument containing whitespace"));
353 length
+= strlen (argv
[i
]) + 1;
356 result
= (char *) xmalloc (length
);
358 for (i
= 0; i
< argc
; ++i
)
361 strcat (result
, " ");
362 strcat (result
, argv
[i
]);
370 /* This function strips the '&' character (indicating background
371 execution) that is added as *the last* of the arguments ARGS of a
372 command. A copy of the incoming ARGS without the '&' is returned,
373 unless the resulting string after stripping is empty, in which case
374 NULL is returned. *BG_CHAR_P is an output boolean that indicates
375 whether the '&' character was found. */
378 strip_bg_char (const char *args
, int *bg_char_p
)
382 if (args
== NULL
|| *args
== '\0')
388 p
= args
+ strlen (args
);
392 while (p
> args
&& isspace (p
[-1]))
397 return savestring (args
, p
- args
);
403 return xstrdup (args
);
406 /* Common actions to take after creating any sort of inferior, by any
407 means (running, attaching, connecting, et cetera). The target
408 should be stopped. */
411 post_create_inferior (struct target_ops
*target
, int from_tty
)
414 /* Be sure we own the terminal in case write operations are performed. */
415 target_terminal_ours_for_output ();
417 /* If the target hasn't taken care of this already, do it now.
418 Targets which need to access registers during to_open,
419 to_create_inferior, or to_attach should do it earlier; but many
421 target_find_description ();
423 /* Now that we know the register layout, retrieve current PC. But
424 if the PC is unavailable (e.g., we're opening a core file with
425 missing registers info), ignore it. */
429 stop_pc
= regcache_read_pc (get_current_regcache ());
431 CATCH (ex
, RETURN_MASK_ERROR
)
433 if (ex
.error
!= NOT_AVAILABLE_ERROR
)
434 throw_exception (ex
);
440 const unsigned solib_add_generation
441 = current_program_space
->solib_add_generation
;
443 /* Create the hooks to handle shared library load and unload
445 solib_create_inferior_hook (from_tty
);
447 if (current_program_space
->solib_add_generation
== solib_add_generation
)
449 /* The platform-specific hook should load initial shared libraries,
450 but didn't. FROM_TTY will be incorrectly 0 but such solib
451 targets should be fixed anyway. Call it only after the solib
452 target has been initialized by solib_create_inferior_hook. */
455 warning (_("platform-specific solib_create_inferior_hook did "
456 "not load initial shared libraries."));
458 /* If the solist is global across processes, there's no need to
460 if (!gdbarch_has_global_solist (target_gdbarch ()))
461 solib_add (NULL
, 0, auto_solib_add
);
465 /* If the user sets watchpoints before execution having started,
466 then she gets software watchpoints, because GDB can't know which
467 target will end up being pushed, or if it supports hardware
468 watchpoints or not. breakpoint_re_set takes care of promoting
469 watchpoints to hardware watchpoints if possible, however, if this
470 new inferior doesn't load shared libraries or we don't pull in
471 symbols from any other source on this target/arch,
472 breakpoint_re_set is never called. Call it now so that software
473 watchpoints get a chance to be promoted to hardware watchpoints
474 if the now pushed target supports hardware watchpoints. */
475 breakpoint_re_set ();
477 observer_notify_inferior_created (target
, from_tty
);
480 /* Kill the inferior if already running. This function is designed
481 to be called when we are about to start the execution of the program
482 from the beginning. Ask the user to confirm that he wants to restart
483 the program being debugged when FROM_TTY is non-null. */
486 kill_if_already_running (int from_tty
)
488 if (! ptid_equal (inferior_ptid
, null_ptid
) && target_has_execution
)
490 /* Bail out before killing the program if we will not be able to
492 target_require_runnable ();
495 && !query (_("The program being debugged has been started already.\n\
496 Start it from the beginning? ")))
497 error (_("Program not restarted."));
502 /* See inferior.h. */
505 prepare_execution_command (struct target_ops
*target
, int background
)
507 /* If we get a request for running in the bg but the target
508 doesn't support it, error out. */
509 if (background
&& !target
->to_can_async_p (target
))
510 error (_("Asynchronous execution not supported on this target."));
514 /* If we get a request for running in the fg, then we need to
515 simulate synchronous (fg) execution. Note no cleanup is
516 necessary for this. stdin is re-enabled whenever an error
517 reaches the top level. */
518 all_uis_on_sync_execution_starting ();
522 /* Implement the "run" command. If TBREAK_AT_MAIN is set, then insert
523 a temporary breakpoint at the begining of the main program before
524 running the program. */
527 run_command_1 (char *args
, int from_tty
, int tbreak_at_main
)
529 const char *exec_file
;
530 struct cleanup
*old_chain
;
532 struct ui_out
*uiout
= current_uiout
;
533 struct target_ops
*run_target
;
535 struct cleanup
*args_chain
;
539 kill_if_already_running (from_tty
);
541 init_wait_for_inferior ();
542 clear_breakpoint_hit_counts ();
544 /* Clean up any leftovers from other runs. Some other things from
545 this function should probably be moved into target_pre_inferior. */
546 target_pre_inferior (from_tty
);
548 /* The comment here used to read, "The exec file is re-read every
549 time we do a generic_mourn_inferior, so we just have to worry
550 about the symbol file." The `generic_mourn_inferior' function
551 gets called whenever the program exits. However, suppose the
552 program exits, and *then* the executable file changes? We need
553 to check again here. Since reopen_exec_file doesn't do anything
554 if the timestamp hasn't changed, I don't see the harm. */
558 args
= strip_bg_char (args
, &async_exec
);
559 args_chain
= make_cleanup (xfree
, args
);
561 /* Do validation and preparation before possibly changing anything
564 run_target
= find_run_target ();
566 prepare_execution_command (run_target
, async_exec
);
568 if (non_stop
&& !run_target
->to_supports_non_stop (run_target
))
569 error (_("The target does not support running in non-stop mode."));
571 /* Done. Can now set breakpoints, change inferior args, etc. */
573 /* Insert the temporary breakpoint if a location was specified. */
575 tbreak_command (main_name (), 0);
577 exec_file
= get_exec_file (0);
579 /* We keep symbols from add-symbol-file, on the grounds that the
580 user might want to add some symbols before running the program
581 (right?). But sometimes (dynamic loading where the user manually
582 introduces the new symbols with add-symbol-file), the code which
583 the symbols describe does not persist between runs. Currently
584 the user has to manually nuke all symbols between runs if they
585 want them to go away (PR 2207). This is probably reasonable. */
587 /* If there were other args, beside '&', process them. */
589 set_inferior_args (args
);
593 uiout
->field_string (NULL
, "Starting program");
596 uiout
->field_string ("execfile", exec_file
);
598 /* We call get_inferior_args() because we might need to compute
600 uiout
->field_string ("infargs", get_inferior_args ());
605 /* Done with ARGS. */
606 do_cleanups (args_chain
);
608 /* We call get_inferior_args() because we might need to compute
610 run_target
->to_create_inferior (run_target
, exec_file
,
611 std::string (get_inferior_args ()),
612 environ_vector (current_inferior ()->environment
),
614 /* to_create_inferior should push the target, so after this point we
615 shouldn't refer to run_target again. */
618 /* We're starting off a new process. When we get out of here, in
619 non-stop mode, finish the state of all threads of that process,
620 but leave other threads alone, as they may be stopped in internal
621 events --- the frontend shouldn't see them as stopped. In
622 all-stop, always finish the state of all threads, as we may be
623 resuming more than just the new process. */
625 ptid
= pid_to_ptid (ptid_get_pid (inferior_ptid
));
627 ptid
= minus_one_ptid
;
628 old_chain
= make_cleanup (finish_thread_state_cleanup
, &ptid
);
630 /* Pass zero for FROM_TTY, because at this point the "run" command
631 has done its thing; now we are setting up the running program. */
632 post_create_inferior (¤t_target
, 0);
634 /* Start the target running. Do not use -1 continuation as it would skip
635 breakpoint right at the entry point. */
636 proceed (regcache_read_pc (get_current_regcache ()), GDB_SIGNAL_0
);
638 /* Since there was no error, there's no need to finish the thread
640 discard_cleanups (old_chain
);
644 run_command (char *args
, int from_tty
)
646 run_command_1 (args
, from_tty
, 0);
649 /* Start the execution of the program up until the beginning of the main
653 start_command (char *args
, int from_tty
)
655 /* Some languages such as Ada need to search inside the program
656 minimal symbols for the location where to put the temporary
657 breakpoint before starting. */
658 if (!have_minimal_symbols ())
659 error (_("No symbol table loaded. Use the \"file\" command."));
661 /* Run the program until reaching the main procedure... */
662 run_command_1 (args
, from_tty
, 1);
666 proceed_thread_callback (struct thread_info
*thread
, void *arg
)
668 /* We go through all threads individually instead of compressing
669 into a single target `resume_all' request, because some threads
670 may be stopped in internal breakpoints/events, or stopped waiting
671 for its turn in the displaced stepping queue (that is, they are
672 running && !executing). The target side has no idea about why
673 the thread is stopped, so a `resume_all' command would resume too
674 much. If/when GDB gains a way to tell the target `hold this
675 thread stopped until I say otherwise', then we can optimize
677 if (!is_stopped (thread
->ptid
))
680 switch_to_thread (thread
->ptid
);
681 clear_proceed_status (0);
682 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
687 ensure_valid_thread (void)
689 if (ptid_equal (inferior_ptid
, null_ptid
)
690 || is_exited (inferior_ptid
))
691 error (_("Cannot execute this command without a live selected thread."));
694 /* If the user is looking at trace frames, any resumption of execution
695 is likely to mix up recorded and live target data. So simply
696 disallow those commands. */
699 ensure_not_tfind_mode (void)
701 if (get_traceframe_number () >= 0)
702 error (_("Cannot execute this command while looking at trace frames."));
705 /* Throw an error indicating the current thread is running. */
708 error_is_running (void)
710 error (_("Cannot execute this command while "
711 "the selected thread is running."));
714 /* Calls error_is_running if the current thread is running. */
717 ensure_not_running (void)
719 if (is_running (inferior_ptid
))
724 continue_1 (int all_threads
)
727 ensure_not_tfind_mode ();
729 if (non_stop
&& all_threads
)
731 /* Don't error out if the current thread is running, because
732 there may be other stopped threads. */
733 struct cleanup
*old_chain
;
735 /* Backup current thread and selected frame. */
736 old_chain
= make_cleanup_restore_current_thread ();
738 iterate_over_threads (proceed_thread_callback
, NULL
);
740 if (current_ui
->prompt_state
== PROMPT_BLOCKED
)
742 /* If all threads in the target were already running,
743 proceed_thread_callback ends up never calling proceed,
744 and so nothing calls this to put the inferior's terminal
745 settings in effect and remove stdin from the event loop,
746 which we must when running a foreground command. E.g.:
750 <all threads are running now>
753 <no thread was resumed, but the inferior now owns the terminal>
755 target_terminal_inferior ();
758 /* Restore selected ptid. */
759 do_cleanups (old_chain
);
763 ensure_valid_thread ();
764 ensure_not_running ();
765 clear_proceed_status (0);
766 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
770 /* continue [-a] [proceed-count] [&] */
773 continue_command (char *args
, int from_tty
)
777 struct cleanup
*args_chain
;
781 /* Find out whether we must run in the background. */
782 args
= strip_bg_char (args
, &async_exec
);
783 args_chain
= make_cleanup (xfree
, args
);
787 if (startswith (args
, "-a"))
790 args
+= sizeof ("-a") - 1;
796 if (!non_stop
&& all_threads
)
797 error (_("`-a' is meaningless in all-stop mode."));
799 if (args
!= NULL
&& all_threads
)
800 error (_("Can't resume all threads and specify "
801 "proceed count simultaneously."));
803 /* If we have an argument left, set proceed count of breakpoint we
810 struct thread_info
*tp
;
813 tp
= find_thread_ptid (inferior_ptid
);
817 struct target_waitstatus ws
;
819 get_last_target_status (&last_ptid
, &ws
);
820 tp
= find_thread_ptid (last_ptid
);
823 bs
= tp
->control
.stop_bpstat
;
825 while ((stat
= bpstat_num (&bs
, &num
)) != 0)
828 set_ignore_count (num
,
829 parse_and_eval_long (args
) - 1,
831 /* set_ignore_count prints a message ending with a period.
832 So print two spaces before "Continuing.". */
834 printf_filtered (" ");
838 if (!stopped
&& from_tty
)
841 ("Not stopped at any breakpoint; argument ignored.\n");
845 /* Done with ARGS. */
846 do_cleanups (args_chain
);
849 ensure_not_tfind_mode ();
851 if (!non_stop
|| !all_threads
)
853 ensure_valid_thread ();
854 ensure_not_running ();
857 prepare_execution_command (¤t_target
, async_exec
);
860 printf_filtered (_("Continuing.\n"));
862 continue_1 (all_threads
);
865 /* Record the starting point of a "step" or "next" command. */
868 set_step_frame (void)
870 struct symtab_and_line sal
;
872 struct frame_info
*frame
= get_current_frame ();
873 struct thread_info
*tp
= inferior_thread ();
875 find_frame_sal (frame
, &sal
);
876 set_step_info (frame
, sal
);
877 pc
= get_frame_pc (frame
);
878 tp
->control
.step_start_function
= find_pc_function (pc
);
881 /* Step until outside of current statement. */
884 step_command (char *count_string
, int from_tty
)
886 step_1 (0, 0, count_string
);
889 /* Likewise, but skip over subroutine calls as if single instructions. */
892 next_command (char *count_string
, int from_tty
)
894 step_1 (1, 0, count_string
);
897 /* Likewise, but step only one instruction. */
900 stepi_command (char *count_string
, int from_tty
)
902 step_1 (0, 1, count_string
);
906 nexti_command (char *count_string
, int from_tty
)
908 step_1 (1, 1, count_string
);
912 delete_longjmp_breakpoint_cleanup (void *arg
)
914 int thread
= * (int *) arg
;
915 delete_longjmp_breakpoint (thread
);
918 /* Data for the FSM that manages the step/next/stepi/nexti
921 struct step_command_fsm
923 /* The base class. */
924 struct thread_fsm thread_fsm
;
926 /* How many steps left in a "step N"-like command. */
929 /* If true, this is a next/nexti, otherwise a step/stepi. */
930 int skip_subroutines
;
932 /* If true, this is a stepi/nexti, otherwise a step/step. */
936 static void step_command_fsm_clean_up (struct thread_fsm
*self
,
937 struct thread_info
*thread
);
938 static int step_command_fsm_should_stop (struct thread_fsm
*self
,
939 struct thread_info
*thread
);
940 static enum async_reply_reason
941 step_command_fsm_async_reply_reason (struct thread_fsm
*self
);
943 /* step_command_fsm's vtable. */
945 static struct thread_fsm_ops step_command_fsm_ops
=
948 step_command_fsm_clean_up
,
949 step_command_fsm_should_stop
,
950 NULL
, /* return_value */
951 step_command_fsm_async_reply_reason
,
954 /* Allocate a new step_command_fsm. */
956 static struct step_command_fsm
*
957 new_step_command_fsm (struct interp
*cmd_interp
)
959 struct step_command_fsm
*sm
;
961 sm
= XCNEW (struct step_command_fsm
);
962 thread_fsm_ctor (&sm
->thread_fsm
, &step_command_fsm_ops
, cmd_interp
);
967 /* Prepare for a step/next/etc. command. Any target resource
968 allocated here is undone in the FSM's clean_up method. */
971 step_command_fsm_prepare (struct step_command_fsm
*sm
,
972 int skip_subroutines
, int single_inst
,
973 int count
, struct thread_info
*thread
)
975 sm
->skip_subroutines
= skip_subroutines
;
976 sm
->single_inst
= single_inst
;
979 /* Leave the si command alone. */
980 if (!sm
->single_inst
|| sm
->skip_subroutines
)
981 set_longjmp_breakpoint (thread
, get_frame_id (get_current_frame ()));
983 thread
->control
.stepping_command
= 1;
986 static int prepare_one_step (struct step_command_fsm
*sm
);
989 step_1 (int skip_subroutines
, int single_inst
, char *count_string
)
993 struct cleanup
*args_chain
;
994 struct thread_info
*thr
;
995 struct step_command_fsm
*step_sm
;
998 ensure_not_tfind_mode ();
999 ensure_valid_thread ();
1000 ensure_not_running ();
1002 count_string
= strip_bg_char (count_string
, &async_exec
);
1003 args_chain
= make_cleanup (xfree
, count_string
);
1005 prepare_execution_command (¤t_target
, async_exec
);
1007 count
= count_string
? parse_and_eval_long (count_string
) : 1;
1009 /* Done with ARGS. */
1010 do_cleanups (args_chain
);
1012 clear_proceed_status (1);
1014 /* Setup the execution command state machine to handle all the COUNT
1016 thr
= inferior_thread ();
1017 step_sm
= new_step_command_fsm (command_interp ());
1018 thr
->thread_fsm
= &step_sm
->thread_fsm
;
1020 step_command_fsm_prepare (step_sm
, skip_subroutines
,
1021 single_inst
, count
, thr
);
1023 /* Do only one step for now, before returning control to the event
1024 loop. Let the continuation figure out how many other steps we
1025 need to do, and handle them one at the time, through
1027 if (!prepare_one_step (step_sm
))
1028 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
1033 /* Stepped into an inline frame. Pretend that we've
1035 thread_fsm_clean_up (thr
->thread_fsm
, thr
);
1036 proceeded
= normal_stop ();
1038 inferior_event_handler (INF_EXEC_COMPLETE
, NULL
);
1039 all_uis_check_sync_execution_done ();
1043 /* Implementation of the 'should_stop' FSM method for stepping
1044 commands. Called after we are done with one step operation, to
1045 check whether we need to step again, before we print the prompt and
1046 return control to the user. If count is > 1, returns false, as we
1047 will need to keep going. */
1050 step_command_fsm_should_stop (struct thread_fsm
*self
, struct thread_info
*tp
)
1052 struct step_command_fsm
*sm
= (struct step_command_fsm
*) self
;
1054 if (tp
->control
.stop_step
)
1056 /* There are more steps to make, and we did stop due to
1057 ending a stepping range. Do another step. */
1058 if (--sm
->count
> 0)
1059 return prepare_one_step (sm
);
1061 thread_fsm_set_finished (self
);
1067 /* Implementation of the 'clean_up' FSM method for stepping commands. */
1070 step_command_fsm_clean_up (struct thread_fsm
*self
, struct thread_info
*thread
)
1072 struct step_command_fsm
*sm
= (struct step_command_fsm
*) self
;
1074 if (!sm
->single_inst
|| sm
->skip_subroutines
)
1075 delete_longjmp_breakpoint (thread
->global_num
);
1078 /* Implementation of the 'async_reply_reason' FSM method for stepping
1081 static enum async_reply_reason
1082 step_command_fsm_async_reply_reason (struct thread_fsm
*self
)
1084 return EXEC_ASYNC_END_STEPPING_RANGE
;
1087 /* Prepare for one step in "step N". The actual target resumption is
1088 done by the caller. Return true if we're done and should thus
1089 report a stop to the user. Returns false if the target needs to be
1093 prepare_one_step (struct step_command_fsm
*sm
)
1097 struct frame_info
*frame
= get_current_frame ();
1099 /* Don't assume THREAD is a valid thread id. It is set to -1 if
1100 the longjmp breakpoint was not required. Use the
1101 INFERIOR_PTID thread instead, which is the same thread when
1103 struct thread_info
*tp
= inferior_thread ();
1107 if (!sm
->single_inst
)
1111 /* Step at an inlined function behaves like "down". */
1112 if (!sm
->skip_subroutines
1113 && inline_skipped_frames (inferior_ptid
))
1117 /* Pretend that we've ran. */
1118 resume_ptid
= user_visible_resume_ptid (1);
1119 set_running (resume_ptid
, 1);
1121 step_into_inline_frame (inferior_ptid
);
1123 return prepare_one_step (sm
);
1126 pc
= get_frame_pc (frame
);
1127 find_pc_line_pc_range (pc
,
1128 &tp
->control
.step_range_start
,
1129 &tp
->control
.step_range_end
);
1131 tp
->control
.may_range_step
= 1;
1133 /* If we have no line info, switch to stepi mode. */
1134 if (tp
->control
.step_range_end
== 0 && step_stop_if_no_debug
)
1136 tp
->control
.step_range_start
= tp
->control
.step_range_end
= 1;
1137 tp
->control
.may_range_step
= 0;
1139 else if (tp
->control
.step_range_end
== 0)
1143 if (find_pc_partial_function (pc
, &name
,
1144 &tp
->control
.step_range_start
,
1145 &tp
->control
.step_range_end
) == 0)
1146 error (_("Cannot find bounds of current function"));
1148 target_terminal_ours_for_output ();
1149 printf_filtered (_("Single stepping until exit from function %s,"
1150 "\nwhich has no line number information.\n"),
1156 /* Say we are stepping, but stop after one insn whatever it does. */
1157 tp
->control
.step_range_start
= tp
->control
.step_range_end
= 1;
1158 if (!sm
->skip_subroutines
)
1160 Don't step over function calls, not even to functions lacking
1162 tp
->control
.step_over_calls
= STEP_OVER_NONE
;
1165 if (sm
->skip_subroutines
)
1166 tp
->control
.step_over_calls
= STEP_OVER_ALL
;
1172 thread_fsm_set_finished (&sm
->thread_fsm
);
1177 /* Continue program at specified address. */
1180 jump_command (char *arg
, int from_tty
)
1182 struct gdbarch
*gdbarch
= get_current_arch ();
1184 struct symtabs_and_lines sals
;
1185 struct symtab_and_line sal
;
1189 struct cleanup
*args_chain
;
1192 ensure_not_tfind_mode ();
1193 ensure_valid_thread ();
1194 ensure_not_running ();
1196 /* Find out whether we must run in the background. */
1197 arg
= strip_bg_char (arg
, &async_exec
);
1198 args_chain
= make_cleanup (xfree
, arg
);
1200 prepare_execution_command (¤t_target
, async_exec
);
1203 error_no_arg (_("starting address"));
1205 sals
= decode_line_with_last_displayed (arg
, DECODE_LINE_FUNFIRSTLINE
);
1206 if (sals
.nelts
!= 1)
1208 error (_("Unreasonable jump request"));
1214 /* Done with ARGS. */
1215 do_cleanups (args_chain
);
1217 if (sal
.symtab
== 0 && sal
.pc
== 0)
1218 error (_("No source file has been specified."));
1220 resolve_sal_pc (&sal
); /* May error out. */
1222 /* See if we are trying to jump to another function. */
1223 fn
= get_frame_function (get_current_frame ());
1224 sfn
= find_pc_function (sal
.pc
);
1225 if (fn
!= NULL
&& sfn
!= fn
)
1227 if (!query (_("Line %d is not in `%s'. Jump anyway? "), sal
.line
,
1228 SYMBOL_PRINT_NAME (fn
)))
1230 error (_("Not confirmed."));
1237 struct obj_section
*section
;
1239 fixup_symbol_section (sfn
, 0);
1240 section
= SYMBOL_OBJ_SECTION (symbol_objfile (sfn
), sfn
);
1241 if (section_is_overlay (section
)
1242 && !section_is_mapped (section
))
1244 if (!query (_("WARNING!!! Destination is in "
1245 "unmapped overlay! Jump anyway? ")))
1247 error (_("Not confirmed."));
1257 printf_filtered (_("Continuing at "));
1258 fputs_filtered (paddress (gdbarch
, addr
), gdb_stdout
);
1259 printf_filtered (".\n");
1262 clear_proceed_status (0);
1263 proceed (addr
, GDB_SIGNAL_0
);
1266 /* Continue program giving it specified signal. */
1269 signal_command (char *signum_exp
, int from_tty
)
1271 enum gdb_signal oursig
;
1273 struct cleanup
*args_chain
;
1275 dont_repeat (); /* Too dangerous. */
1277 ensure_not_tfind_mode ();
1278 ensure_valid_thread ();
1279 ensure_not_running ();
1281 /* Find out whether we must run in the background. */
1282 signum_exp
= strip_bg_char (signum_exp
, &async_exec
);
1283 args_chain
= make_cleanup (xfree
, signum_exp
);
1285 prepare_execution_command (¤t_target
, async_exec
);
1288 error_no_arg (_("signal number"));
1290 /* It would be even slicker to make signal names be valid expressions,
1291 (the type could be "enum $signal" or some such), then the user could
1292 assign them to convenience variables. */
1293 oursig
= gdb_signal_from_name (signum_exp
);
1295 if (oursig
== GDB_SIGNAL_UNKNOWN
)
1297 /* No, try numeric. */
1298 int num
= parse_and_eval_long (signum_exp
);
1301 oursig
= GDB_SIGNAL_0
;
1303 oursig
= gdb_signal_from_command (num
);
1306 do_cleanups (args_chain
);
1308 /* Look for threads other than the current that this command ends up
1309 resuming too (due to schedlock off), and warn if they'll get a
1310 signal delivered. "signal 0" is used to suppress a previous
1311 signal, but if the current thread is no longer the one that got
1312 the signal, then the user is potentially suppressing the signal
1313 of the wrong thread. */
1316 struct thread_info
*tp
;
1318 int must_confirm
= 0;
1320 /* This indicates what will be resumed. Either a single thread,
1321 a whole process, or all threads of all processes. */
1322 resume_ptid
= user_visible_resume_ptid (0);
1324 ALL_NON_EXITED_THREADS (tp
)
1326 if (ptid_equal (tp
->ptid
, inferior_ptid
))
1328 if (!ptid_match (tp
->ptid
, resume_ptid
))
1331 if (tp
->suspend
.stop_signal
!= GDB_SIGNAL_0
1332 && signal_pass_state (tp
->suspend
.stop_signal
))
1335 printf_unfiltered (_("Note:\n"));
1336 printf_unfiltered (_(" Thread %s previously stopped with signal %s, %s.\n"),
1337 print_thread_id (tp
),
1338 gdb_signal_to_name (tp
->suspend
.stop_signal
),
1339 gdb_signal_to_string (tp
->suspend
.stop_signal
));
1345 && !query (_("Continuing thread %s (the current thread) with specified signal will\n"
1346 "still deliver the signals noted above to their respective threads.\n"
1347 "Continue anyway? "),
1348 print_thread_id (inferior_thread ())))
1349 error (_("Not confirmed."));
1354 if (oursig
== GDB_SIGNAL_0
)
1355 printf_filtered (_("Continuing with no signal.\n"));
1357 printf_filtered (_("Continuing with signal %s.\n"),
1358 gdb_signal_to_name (oursig
));
1361 clear_proceed_status (0);
1362 proceed ((CORE_ADDR
) -1, oursig
);
1365 /* Queue a signal to be delivered to the current thread. */
1368 queue_signal_command (char *signum_exp
, int from_tty
)
1370 enum gdb_signal oursig
;
1371 struct thread_info
*tp
;
1374 ensure_not_tfind_mode ();
1375 ensure_valid_thread ();
1376 ensure_not_running ();
1378 if (signum_exp
== NULL
)
1379 error_no_arg (_("signal number"));
1381 /* It would be even slicker to make signal names be valid expressions,
1382 (the type could be "enum $signal" or some such), then the user could
1383 assign them to convenience variables. */
1384 oursig
= gdb_signal_from_name (signum_exp
);
1386 if (oursig
== GDB_SIGNAL_UNKNOWN
)
1388 /* No, try numeric. */
1389 int num
= parse_and_eval_long (signum_exp
);
1392 oursig
= GDB_SIGNAL_0
;
1394 oursig
= gdb_signal_from_command (num
);
1397 if (oursig
!= GDB_SIGNAL_0
1398 && !signal_pass_state (oursig
))
1399 error (_("Signal handling set to not pass this signal to the program."));
1401 tp
= inferior_thread ();
1402 tp
->suspend
.stop_signal
= oursig
;
1405 /* Data for the FSM that manages the until (with no argument)
1408 struct until_next_fsm
1410 /* The base class. */
1411 struct thread_fsm thread_fsm
;
1413 /* The thread that as current when the command was executed. */
1417 static int until_next_fsm_should_stop (struct thread_fsm
*self
,
1418 struct thread_info
*thread
);
1419 static void until_next_fsm_clean_up (struct thread_fsm
*self
,
1420 struct thread_info
*thread
);
1421 static enum async_reply_reason
1422 until_next_fsm_async_reply_reason (struct thread_fsm
*self
);
1424 /* until_next_fsm's vtable. */
1426 static struct thread_fsm_ops until_next_fsm_ops
=
1429 until_next_fsm_clean_up
,
1430 until_next_fsm_should_stop
,
1431 NULL
, /* return_value */
1432 until_next_fsm_async_reply_reason
,
1435 /* Allocate a new until_next_fsm. */
1437 static struct until_next_fsm
*
1438 new_until_next_fsm (struct interp
*cmd_interp
, int thread
)
1440 struct until_next_fsm
*sm
;
1442 sm
= XCNEW (struct until_next_fsm
);
1443 thread_fsm_ctor (&sm
->thread_fsm
, &until_next_fsm_ops
, cmd_interp
);
1445 sm
->thread
= thread
;
1450 /* Implementation of the 'should_stop' FSM method for the until (with
1454 until_next_fsm_should_stop (struct thread_fsm
*self
,
1455 struct thread_info
*tp
)
1457 if (tp
->control
.stop_step
)
1458 thread_fsm_set_finished (self
);
1463 /* Implementation of the 'clean_up' FSM method for the until (with no
1467 until_next_fsm_clean_up (struct thread_fsm
*self
, struct thread_info
*thread
)
1469 struct until_next_fsm
*sm
= (struct until_next_fsm
*) self
;
1471 delete_longjmp_breakpoint (thread
->global_num
);
1474 /* Implementation of the 'async_reply_reason' FSM method for the until
1475 (with no arg) command. */
1477 static enum async_reply_reason
1478 until_next_fsm_async_reply_reason (struct thread_fsm
*self
)
1480 return EXEC_ASYNC_END_STEPPING_RANGE
;
1483 /* Proceed until we reach a different source line with pc greater than
1484 our current one or exit the function. We skip calls in both cases.
1486 Note that eventually this command should probably be changed so
1487 that only source lines are printed out when we hit the breakpoint
1488 we set. This may involve changes to wait_for_inferior and the
1489 proceed status code. */
1492 until_next_command (int from_tty
)
1494 struct frame_info
*frame
;
1496 struct symbol
*func
;
1497 struct symtab_and_line sal
;
1498 struct thread_info
*tp
= inferior_thread ();
1499 int thread
= tp
->global_num
;
1500 struct cleanup
*old_chain
;
1501 struct until_next_fsm
*sm
;
1503 clear_proceed_status (0);
1506 frame
= get_current_frame ();
1508 /* Step until either exited from this function or greater
1509 than the current line (if in symbolic section) or pc (if
1512 pc
= get_frame_pc (frame
);
1513 func
= find_pc_function (pc
);
1517 struct bound_minimal_symbol msymbol
= lookup_minimal_symbol_by_pc (pc
);
1519 if (msymbol
.minsym
== NULL
)
1520 error (_("Execution is not within a known function."));
1522 tp
->control
.step_range_start
= BMSYMBOL_VALUE_ADDRESS (msymbol
);
1523 /* The upper-bound of step_range is exclusive. In order to make PC
1524 within the range, set the step_range_end with PC + 1. */
1525 tp
->control
.step_range_end
= pc
+ 1;
1529 sal
= find_pc_line (pc
, 0);
1531 tp
->control
.step_range_start
= BLOCK_START (SYMBOL_BLOCK_VALUE (func
));
1532 tp
->control
.step_range_end
= sal
.end
;
1534 tp
->control
.may_range_step
= 1;
1536 tp
->control
.step_over_calls
= STEP_OVER_ALL
;
1538 set_longjmp_breakpoint (tp
, get_frame_id (frame
));
1539 old_chain
= make_cleanup (delete_longjmp_breakpoint_cleanup
, &thread
);
1541 sm
= new_until_next_fsm (command_interp (), tp
->global_num
);
1542 tp
->thread_fsm
= &sm
->thread_fsm
;
1543 discard_cleanups (old_chain
);
1545 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
1549 until_command (char *arg
, int from_tty
)
1552 struct cleanup
*args_chain
;
1555 ensure_not_tfind_mode ();
1556 ensure_valid_thread ();
1557 ensure_not_running ();
1559 /* Find out whether we must run in the background. */
1560 arg
= strip_bg_char (arg
, &async_exec
);
1561 args_chain
= make_cleanup (xfree
, arg
);
1563 prepare_execution_command (¤t_target
, async_exec
);
1566 until_break_command (arg
, from_tty
, 0);
1568 until_next_command (from_tty
);
1570 /* Done with ARGS. */
1571 do_cleanups (args_chain
);
1575 advance_command (char *arg
, int from_tty
)
1578 struct cleanup
*args_chain
;
1581 ensure_not_tfind_mode ();
1582 ensure_valid_thread ();
1583 ensure_not_running ();
1586 error_no_arg (_("a location"));
1588 /* Find out whether we must run in the background. */
1589 arg
= strip_bg_char (arg
, &async_exec
);
1590 args_chain
= make_cleanup (xfree
, arg
);
1592 prepare_execution_command (¤t_target
, async_exec
);
1594 until_break_command (arg
, from_tty
, 1);
1596 /* Done with ARGS. */
1597 do_cleanups (args_chain
);
1600 /* Return the value of the result of a function at the end of a 'finish'
1601 command/BP. DTOR_DATA (if not NULL) can represent inferior registers
1602 right after an inferior call has finished. */
1605 get_return_value (struct value
*function
, struct type
*value_type
)
1607 regcache
stop_regs (regcache::readonly
, *get_current_regcache ());
1608 struct gdbarch
*gdbarch
= stop_regs
.arch ();
1609 struct value
*value
;
1611 value_type
= check_typedef (value_type
);
1612 gdb_assert (TYPE_CODE (value_type
) != TYPE_CODE_VOID
);
1614 /* FIXME: 2003-09-27: When returning from a nested inferior function
1615 call, it's possible (with no help from the architecture vector)
1616 to locate and return/print a "struct return" value. This is just
1617 a more complicated case of what is already being done in the
1618 inferior function call code. In fact, when inferior function
1619 calls are made async, this will likely be made the norm. */
1621 switch (gdbarch_return_value (gdbarch
, function
, value_type
,
1624 case RETURN_VALUE_REGISTER_CONVENTION
:
1625 case RETURN_VALUE_ABI_RETURNS_ADDRESS
:
1626 case RETURN_VALUE_ABI_PRESERVES_ADDRESS
:
1627 value
= allocate_value (value_type
);
1628 gdbarch_return_value (gdbarch
, function
, value_type
, &stop_regs
,
1629 value_contents_raw (value
), NULL
);
1631 case RETURN_VALUE_STRUCT_CONVENTION
:
1635 internal_error (__FILE__
, __LINE__
, _("bad switch"));
1641 /* The captured function return value/type and its position in the
1644 struct return_value_info
1646 /* The captured return value. May be NULL if we weren't able to
1647 retrieve it. See get_return_value. */
1648 struct value
*value
;
1650 /* The return type. In some cases, we'll not be able extract the
1651 return value, but we always know the type. */
1654 /* If we captured a value, this is the value history index. */
1655 int value_history_index
;
1658 /* Helper for print_return_value. */
1661 print_return_value_1 (struct ui_out
*uiout
, struct return_value_info
*rv
)
1663 if (rv
->value
!= NULL
)
1665 struct value_print_options opts
;
1668 uiout
->text ("Value returned is ");
1669 uiout
->field_fmt ("gdb-result-var", "$%d",
1670 rv
->value_history_index
);
1671 uiout
->text (" = ");
1672 get_no_prettyformat_print_options (&opts
);
1676 value_print (rv
->value
, &stb
, &opts
);
1677 uiout
->field_stream ("return-value", stb
);
1682 std::string type_name
= type_to_string (rv
->type
);
1683 uiout
->text ("Value returned has type: ");
1684 uiout
->field_string ("return-type", type_name
.c_str ());
1686 uiout
->text (" Cannot determine contents\n");
1690 /* Print the result of a function at the end of a 'finish' command.
1691 RV points at an object representing the captured return value/type
1692 and its position in the value history. */
1695 print_return_value (struct ui_out
*uiout
, struct return_value_info
*rv
)
1697 if (rv
->type
== NULL
|| TYPE_CODE (rv
->type
) == TYPE_CODE_VOID
)
1702 /* print_return_value_1 can throw an exception in some
1703 circumstances. We need to catch this so that we still
1704 delete the breakpoint. */
1705 print_return_value_1 (uiout
, rv
);
1707 CATCH (ex
, RETURN_MASK_ALL
)
1709 exception_print (gdb_stdout
, ex
);
1714 /* Data for the FSM that manages the finish command. */
1716 struct finish_command_fsm
1718 /* The base class. */
1719 struct thread_fsm thread_fsm
;
1721 /* The momentary breakpoint set at the function's return address in
1723 struct breakpoint
*breakpoint
;
1725 /* The function that we're stepping out of. */
1726 struct symbol
*function
;
1728 /* If the FSM finishes successfully, this stores the function's
1730 struct return_value_info return_value
;
1733 static int finish_command_fsm_should_stop (struct thread_fsm
*self
,
1734 struct thread_info
*thread
);
1735 static void finish_command_fsm_clean_up (struct thread_fsm
*self
,
1736 struct thread_info
*thread
);
1737 static struct return_value_info
*
1738 finish_command_fsm_return_value (struct thread_fsm
*self
);
1739 static enum async_reply_reason
1740 finish_command_fsm_async_reply_reason (struct thread_fsm
*self
);
1742 /* finish_command_fsm's vtable. */
1744 static struct thread_fsm_ops finish_command_fsm_ops
=
1747 finish_command_fsm_clean_up
,
1748 finish_command_fsm_should_stop
,
1749 finish_command_fsm_return_value
,
1750 finish_command_fsm_async_reply_reason
,
1751 NULL
, /* should_notify_stop */
1754 /* Allocate a new finish_command_fsm. */
1756 static struct finish_command_fsm
*
1757 new_finish_command_fsm (struct interp
*cmd_interp
)
1759 struct finish_command_fsm
*sm
;
1761 sm
= XCNEW (struct finish_command_fsm
);
1762 thread_fsm_ctor (&sm
->thread_fsm
, &finish_command_fsm_ops
, cmd_interp
);
1767 /* Implementation of the 'should_stop' FSM method for the finish
1768 commands. Detects whether the thread stepped out of the function
1769 successfully, and if so, captures the function's return value and
1770 marks the FSM finished. */
1773 finish_command_fsm_should_stop (struct thread_fsm
*self
,
1774 struct thread_info
*tp
)
1776 struct finish_command_fsm
*f
= (struct finish_command_fsm
*) self
;
1777 struct return_value_info
*rv
= &f
->return_value
;
1779 if (f
->function
!= NULL
1780 && bpstat_find_breakpoint (tp
->control
.stop_bpstat
,
1781 f
->breakpoint
) != NULL
)
1784 thread_fsm_set_finished (self
);
1786 rv
->type
= TYPE_TARGET_TYPE (SYMBOL_TYPE (f
->function
));
1787 if (rv
->type
== NULL
)
1788 internal_error (__FILE__
, __LINE__
,
1789 _("finish_command: function has no target type"));
1791 if (TYPE_CODE (rv
->type
) != TYPE_CODE_VOID
)
1795 func
= read_var_value (f
->function
, NULL
, get_current_frame ());
1796 rv
->value
= get_return_value (func
, rv
->type
);
1797 if (rv
->value
!= NULL
)
1798 rv
->value_history_index
= record_latest_value (rv
->value
);
1801 else if (tp
->control
.stop_step
)
1803 /* Finishing from an inline frame, or reverse finishing. In
1804 either case, there's no way to retrieve the return value. */
1805 thread_fsm_set_finished (self
);
1811 /* Implementation of the 'clean_up' FSM method for the finish
1815 finish_command_fsm_clean_up (struct thread_fsm
*self
,
1816 struct thread_info
*thread
)
1818 struct finish_command_fsm
*f
= (struct finish_command_fsm
*) self
;
1820 if (f
->breakpoint
!= NULL
)
1822 delete_breakpoint (f
->breakpoint
);
1823 f
->breakpoint
= NULL
;
1825 delete_longjmp_breakpoint (thread
->global_num
);
1828 /* Implementation of the 'return_value' FSM method for the finish
1831 static struct return_value_info
*
1832 finish_command_fsm_return_value (struct thread_fsm
*self
)
1834 struct finish_command_fsm
*f
= (struct finish_command_fsm
*) self
;
1836 return &f
->return_value
;
1839 /* Implementation of the 'async_reply_reason' FSM method for the
1842 static enum async_reply_reason
1843 finish_command_fsm_async_reply_reason (struct thread_fsm
*self
)
1845 if (execution_direction
== EXEC_REVERSE
)
1846 return EXEC_ASYNC_END_STEPPING_RANGE
;
1848 return EXEC_ASYNC_FUNCTION_FINISHED
;
1851 /* finish_backward -- helper function for finish_command. */
1854 finish_backward (struct finish_command_fsm
*sm
)
1856 struct symtab_and_line sal
;
1857 struct thread_info
*tp
= inferior_thread ();
1859 CORE_ADDR func_addr
;
1861 pc
= get_frame_pc (get_current_frame ());
1863 if (find_pc_partial_function (pc
, NULL
, &func_addr
, NULL
) == 0)
1864 error (_("Cannot find bounds of current function"));
1866 sal
= find_pc_line (func_addr
, 0);
1868 tp
->control
.proceed_to_finish
= 1;
1869 /* Special case: if we're sitting at the function entry point,
1870 then all we need to do is take a reverse singlestep. We
1871 don't need to set a breakpoint, and indeed it would do us
1874 Note that this can only happen at frame #0, since there's
1875 no way that a function up the stack can have a return address
1876 that's equal to its entry point. */
1880 struct frame_info
*frame
= get_selected_frame (NULL
);
1881 struct gdbarch
*gdbarch
= get_frame_arch (frame
);
1882 struct symtab_and_line sr_sal
;
1884 /* Set a step-resume at the function's entry point. Once that's
1885 hit, we'll do one more step backwards. */
1888 sr_sal
.pspace
= get_frame_program_space (frame
);
1889 insert_step_resume_breakpoint_at_sal (gdbarch
,
1890 sr_sal
, null_frame_id
);
1892 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
1896 /* We're almost there -- we just need to back up by one more
1898 tp
->control
.step_range_start
= tp
->control
.step_range_end
= 1;
1899 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
1903 /* finish_forward -- helper function for finish_command. FRAME is the
1904 frame that called the function we're about to step out of. */
1907 finish_forward (struct finish_command_fsm
*sm
, struct frame_info
*frame
)
1909 struct frame_id frame_id
= get_frame_id (frame
);
1910 struct gdbarch
*gdbarch
= get_frame_arch (frame
);
1911 struct symtab_and_line sal
;
1912 struct thread_info
*tp
= inferior_thread ();
1914 sal
= find_pc_line (get_frame_pc (frame
), 0);
1915 sal
.pc
= get_frame_pc (frame
);
1917 sm
->breakpoint
= set_momentary_breakpoint (gdbarch
, sal
,
1918 get_stack_frame_id (frame
),
1921 /* set_momentary_breakpoint invalidates FRAME. */
1924 set_longjmp_breakpoint (tp
, frame_id
);
1926 /* We want to print return value, please... */
1927 tp
->control
.proceed_to_finish
= 1;
1929 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
1932 /* Skip frames for "finish". */
1934 static struct frame_info
*
1935 skip_finish_frames (struct frame_info
*frame
)
1937 struct frame_info
*start
;
1943 frame
= skip_tailcall_frames (frame
);
1947 frame
= skip_unwritable_frames (frame
);
1951 while (start
!= frame
);
1956 /* "finish": Set a temporary breakpoint at the place the selected
1957 frame will return to, then continue. */
1960 finish_command (char *arg
, int from_tty
)
1962 struct frame_info
*frame
;
1964 struct cleanup
*args_chain
;
1965 struct finish_command_fsm
*sm
;
1966 struct thread_info
*tp
;
1969 ensure_not_tfind_mode ();
1970 ensure_valid_thread ();
1971 ensure_not_running ();
1973 /* Find out whether we must run in the background. */
1974 arg
= strip_bg_char (arg
, &async_exec
);
1975 args_chain
= make_cleanup (xfree
, arg
);
1977 prepare_execution_command (¤t_target
, async_exec
);
1980 error (_("The \"finish\" command does not take any arguments."));
1982 /* Done with ARGS. */
1983 do_cleanups (args_chain
);
1985 frame
= get_prev_frame (get_selected_frame (_("No selected frame.")));
1987 error (_("\"finish\" not meaningful in the outermost frame."));
1989 clear_proceed_status (0);
1991 tp
= inferior_thread ();
1993 sm
= new_finish_command_fsm (command_interp ());
1995 tp
->thread_fsm
= &sm
->thread_fsm
;
1997 /* Finishing from an inline frame is completely different. We don't
1998 try to show the "return value" - no way to locate it. */
1999 if (get_frame_type (get_selected_frame (_("No selected frame.")))
2002 /* Claim we are stepping in the calling frame. An empty step
2003 range means that we will stop once we aren't in a function
2004 called by that frame. We don't use the magic "1" value for
2005 step_range_end, because then infrun will think this is nexti,
2006 and not step over the rest of this inlined function call. */
2007 struct symtab_and_line empty_sal
;
2009 init_sal (&empty_sal
);
2010 set_step_info (frame
, empty_sal
);
2011 tp
->control
.step_range_start
= get_frame_pc (frame
);
2012 tp
->control
.step_range_end
= tp
->control
.step_range_start
;
2013 tp
->control
.step_over_calls
= STEP_OVER_ALL
;
2015 /* Print info on the selected frame, including level number but not
2019 printf_filtered (_("Run till exit from "));
2020 print_stack_frame (get_selected_frame (NULL
), 1, LOCATION
, 0);
2023 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
2027 /* Find the function we will return from. */
2029 sm
->function
= find_pc_function (get_frame_pc (get_selected_frame (NULL
)));
2031 /* Print info on the selected frame, including level number but not
2035 if (execution_direction
== EXEC_REVERSE
)
2036 printf_filtered (_("Run back to call of "));
2039 if (sm
->function
!= NULL
&& TYPE_NO_RETURN (sm
->function
->type
)
2040 && !query (_("warning: Function %s does not return normally.\n"
2041 "Try to finish anyway? "),
2042 SYMBOL_PRINT_NAME (sm
->function
)))
2043 error (_("Not confirmed."));
2044 printf_filtered (_("Run till exit from "));
2047 print_stack_frame (get_selected_frame (NULL
), 1, LOCATION
, 0);
2050 if (execution_direction
== EXEC_REVERSE
)
2051 finish_backward (sm
);
2054 frame
= skip_finish_frames (frame
);
2057 error (_("Cannot find the caller frame."));
2059 finish_forward (sm
, frame
);
2065 program_info (char *args
, int from_tty
)
2069 struct thread_info
*tp
;
2072 if (!target_has_execution
)
2074 printf_filtered (_("The program being debugged is not being run.\n"));
2079 ptid
= inferior_ptid
;
2082 struct target_waitstatus ws
;
2084 get_last_target_status (&ptid
, &ws
);
2087 if (ptid_equal (ptid
, null_ptid
) || is_exited (ptid
))
2088 error (_("Invalid selected thread."));
2089 else if (is_running (ptid
))
2090 error (_("Selected thread is running."));
2092 tp
= find_thread_ptid (ptid
);
2093 bs
= tp
->control
.stop_bpstat
;
2094 stat
= bpstat_num (&bs
, &num
);
2096 target_files_info ();
2097 printf_filtered (_("Program stopped at %s.\n"),
2098 paddress (target_gdbarch (), stop_pc
));
2099 if (tp
->control
.stop_step
)
2100 printf_filtered (_("It stopped after being stepped.\n"));
2103 /* There may be several breakpoints in the same place, so this
2104 isn't as strange as it seems. */
2109 printf_filtered (_("It stopped at a breakpoint "
2110 "that has since been deleted.\n"));
2113 printf_filtered (_("It stopped at breakpoint %d.\n"), num
);
2114 stat
= bpstat_num (&bs
, &num
);
2117 else if (tp
->suspend
.stop_signal
!= GDB_SIGNAL_0
)
2119 printf_filtered (_("It stopped with signal %s, %s.\n"),
2120 gdb_signal_to_name (tp
->suspend
.stop_signal
),
2121 gdb_signal_to_string (tp
->suspend
.stop_signal
));
2126 printf_filtered (_("Type \"info stack\" or \"info "
2127 "registers\" for more information.\n"));
2132 environment_info (char *var
, int from_tty
)
2136 char *val
= get_in_environ (current_inferior ()->environment
, var
);
2140 puts_filtered (var
);
2141 puts_filtered (" = ");
2142 puts_filtered (val
);
2143 puts_filtered ("\n");
2147 puts_filtered ("Environment variable \"");
2148 puts_filtered (var
);
2149 puts_filtered ("\" not defined.\n");
2154 char **vector
= environ_vector (current_inferior ()->environment
);
2158 puts_filtered (*vector
++);
2159 puts_filtered ("\n");
2165 set_environment_command (char *arg
, int from_tty
)
2167 char *p
, *val
, *var
;
2171 error_no_arg (_("environment variable and value"));
2173 /* Find seperation between variable name and value. */
2174 p
= (char *) strchr (arg
, '=');
2175 val
= (char *) strchr (arg
, ' ');
2177 if (p
!= 0 && val
!= 0)
2179 /* We have both a space and an equals. If the space is before the
2180 equals, walk forward over the spaces til we see a nonspace
2181 (possibly the equals). */
2186 /* Now if the = is after the char following the spaces,
2187 take the char following the spaces. */
2191 else if (val
!= 0 && p
== 0)
2195 error_no_arg (_("environment variable to set"));
2197 if (p
== 0 || p
[1] == 0)
2201 p
= arg
+ strlen (arg
); /* So that savestring below will work. */
2205 /* Not setting variable value to null. */
2207 while (*val
== ' ' || *val
== '\t')
2211 while (p
!= arg
&& (p
[-1] == ' ' || p
[-1] == '\t'))
2214 var
= savestring (arg
, p
- arg
);
2217 printf_filtered (_("Setting environment variable "
2218 "\"%s\" to null value.\n"),
2220 set_in_environ (current_inferior ()->environment
, var
, "");
2223 set_in_environ (current_inferior ()->environment
, var
, val
);
2228 unset_environment_command (char *var
, int from_tty
)
2232 /* If there is no argument, delete all environment variables.
2233 Ask for confirmation if reading from the terminal. */
2234 if (!from_tty
|| query (_("Delete all environment variables? ")))
2236 free_environ (current_inferior ()->environment
);
2237 current_inferior ()->environment
= make_environ ();
2241 unset_in_environ (current_inferior ()->environment
, var
);
2244 /* Handle the execution path (PATH variable). */
2246 static const char path_var_name
[] = "PATH";
2249 path_info (char *args
, int from_tty
)
2251 puts_filtered ("Executable and object file path: ");
2252 puts_filtered (get_in_environ (current_inferior ()->environment
,
2254 puts_filtered ("\n");
2257 /* Add zero or more directories to the front of the execution path. */
2260 path_command (char *dirname
, int from_tty
)
2266 env
= get_in_environ (current_inferior ()->environment
, path_var_name
);
2267 /* Can be null if path is not set. */
2270 exec_path
= xstrdup (env
);
2271 mod_path (dirname
, &exec_path
);
2272 set_in_environ (current_inferior ()->environment
, path_var_name
, exec_path
);
2275 path_info ((char *) NULL
, from_tty
);
2279 /* Print out the register NAME with value VAL, to FILE, in the default
2283 default_print_one_register_info (struct ui_file
*file
,
2287 struct type
*regtype
= value_type (val
);
2288 int print_raw_format
;
2290 fputs_filtered (name
, file
);
2291 print_spaces_filtered (15 - strlen (name
), file
);
2293 print_raw_format
= (value_entirely_available (val
)
2294 && !value_optimized_out (val
));
2296 /* If virtual format is floating, print it that way, and in raw
2298 if (TYPE_CODE (regtype
) == TYPE_CODE_FLT
2299 || TYPE_CODE (regtype
) == TYPE_CODE_DECFLOAT
)
2301 struct value_print_options opts
;
2302 const gdb_byte
*valaddr
= value_contents_for_printing (val
);
2303 enum bfd_endian byte_order
= gdbarch_byte_order (get_type_arch (regtype
));
2305 get_user_print_options (&opts
);
2309 value_embedded_offset (val
), 0,
2310 file
, 0, val
, &opts
, current_language
);
2312 if (print_raw_format
)
2314 fprintf_filtered (file
, "\t(raw ");
2315 print_hex_chars (file
, valaddr
, TYPE_LENGTH (regtype
), byte_order
);
2316 fprintf_filtered (file
, ")");
2321 struct value_print_options opts
;
2323 /* Print the register in hex. */
2324 get_formatted_print_options (&opts
, 'x');
2327 value_embedded_offset (val
), 0,
2328 file
, 0, val
, &opts
, current_language
);
2329 /* If not a vector register, print it also according to its
2331 if (print_raw_format
&& TYPE_VECTOR (regtype
) == 0)
2333 get_user_print_options (&opts
);
2335 fprintf_filtered (file
, "\t");
2337 value_embedded_offset (val
), 0,
2338 file
, 0, val
, &opts
, current_language
);
2342 fprintf_filtered (file
, "\n");
2345 /* Print out the machine register regnum. If regnum is -1, print all
2346 registers (print_all == 1) or all non-float and non-vector
2347 registers (print_all == 0).
2349 For most machines, having all_registers_info() print the
2350 register(s) one per line is good enough. If a different format is
2351 required, (eg, for MIPS or Pyramid 90x, which both have lots of
2352 regs), or there is an existing convention for showing all the
2353 registers, define the architecture method PRINT_REGISTERS_INFO to
2354 provide that format. */
2357 default_print_registers_info (struct gdbarch
*gdbarch
,
2358 struct ui_file
*file
,
2359 struct frame_info
*frame
,
2360 int regnum
, int print_all
)
2363 const int numregs
= gdbarch_num_regs (gdbarch
)
2364 + gdbarch_num_pseudo_regs (gdbarch
);
2366 for (i
= 0; i
< numregs
; i
++)
2368 /* Decide between printing all regs, non-float / vector regs, or
2374 if (!gdbarch_register_reggroup_p (gdbarch
, i
, all_reggroup
))
2379 if (!gdbarch_register_reggroup_p (gdbarch
, i
, general_reggroup
))
2389 /* If the register name is empty, it is undefined for this
2390 processor, so don't display anything. */
2391 if (gdbarch_register_name (gdbarch
, i
) == NULL
2392 || *(gdbarch_register_name (gdbarch
, i
)) == '\0')
2395 default_print_one_register_info (file
,
2396 gdbarch_register_name (gdbarch
, i
),
2397 value_of_register (i
, frame
));
2402 registers_info (char *addr_exp
, int fpregs
)
2404 struct frame_info
*frame
;
2405 struct gdbarch
*gdbarch
;
2407 if (!target_has_registers
)
2408 error (_("The program has no registers now."));
2409 frame
= get_selected_frame (NULL
);
2410 gdbarch
= get_frame_arch (frame
);
2414 gdbarch_print_registers_info (gdbarch
, gdb_stdout
,
2419 while (*addr_exp
!= '\0')
2424 /* Skip leading white space. */
2425 addr_exp
= skip_spaces (addr_exp
);
2427 /* Discard any leading ``$''. Check that there is something
2428 resembling a register following it. */
2429 if (addr_exp
[0] == '$')
2431 if (isspace ((*addr_exp
)) || (*addr_exp
) == '\0')
2432 error (_("Missing register name"));
2434 /* Find the start/end of this register name/num/group. */
2436 while ((*addr_exp
) != '\0' && !isspace ((*addr_exp
)))
2440 /* Figure out what we've found and display it. */
2442 /* A register name? */
2444 int regnum
= user_reg_map_name_to_regnum (gdbarch
, start
, end
- start
);
2448 /* User registers lie completely outside of the range of
2449 normal registers. Catch them early so that the target
2451 if (regnum
>= gdbarch_num_regs (gdbarch
)
2452 + gdbarch_num_pseudo_regs (gdbarch
))
2454 struct value
*regval
= value_of_user_reg (regnum
, frame
);
2455 const char *regname
= user_reg_map_regnum_to_name (gdbarch
,
2458 /* Print in the same fashion
2459 gdbarch_print_registers_info's default
2460 implementation prints. */
2461 default_print_one_register_info (gdb_stdout
,
2466 gdbarch_print_registers_info (gdbarch
, gdb_stdout
,
2467 frame
, regnum
, fpregs
);
2472 /* A register group? */
2474 struct reggroup
*group
;
2476 for (group
= reggroup_next (gdbarch
, NULL
);
2478 group
= reggroup_next (gdbarch
, group
))
2480 /* Don't bother with a length check. Should the user
2481 enter a short register group name, go with the first
2482 group that matches. */
2483 if (strncmp (start
, reggroup_name (group
), end
- start
) == 0)
2491 regnum
< gdbarch_num_regs (gdbarch
)
2492 + gdbarch_num_pseudo_regs (gdbarch
);
2495 if (gdbarch_register_reggroup_p (gdbarch
, regnum
, group
))
2496 gdbarch_print_registers_info (gdbarch
,
2504 /* Nothing matched. */
2505 error (_("Invalid register `%.*s'"), (int) (end
- start
), start
);
2510 all_registers_info (char *addr_exp
, int from_tty
)
2512 registers_info (addr_exp
, 1);
2516 nofp_registers_info (char *addr_exp
, int from_tty
)
2518 registers_info (addr_exp
, 0);
2522 print_vector_info (struct ui_file
*file
,
2523 struct frame_info
*frame
, const char *args
)
2525 struct gdbarch
*gdbarch
= get_frame_arch (frame
);
2527 if (gdbarch_print_vector_info_p (gdbarch
))
2528 gdbarch_print_vector_info (gdbarch
, file
, frame
, args
);
2532 int printed_something
= 0;
2535 regnum
< gdbarch_num_regs (gdbarch
)
2536 + gdbarch_num_pseudo_regs (gdbarch
);
2539 if (gdbarch_register_reggroup_p (gdbarch
, regnum
, vector_reggroup
))
2541 printed_something
= 1;
2542 gdbarch_print_registers_info (gdbarch
, file
, frame
, regnum
, 1);
2545 if (!printed_something
)
2546 fprintf_filtered (file
, "No vector information\n");
2551 vector_info (char *args
, int from_tty
)
2553 if (!target_has_registers
)
2554 error (_("The program has no registers now."));
2556 print_vector_info (gdb_stdout
, get_selected_frame (NULL
), args
);
2559 /* Kill the inferior process. Make us have no inferior. */
2562 kill_command (char *arg
, int from_tty
)
2564 /* FIXME: This should not really be inferior_ptid (or target_has_execution).
2565 It should be a distinct flag that indicates that a target is active, cuz
2566 some targets don't have processes! */
2568 if (ptid_equal (inferior_ptid
, null_ptid
))
2569 error (_("The program is not being run."));
2570 if (!query (_("Kill the program being debugged? ")))
2571 error (_("Not confirmed."));
2574 /* If we still have other inferiors to debug, then don't mess with
2575 with their threads. */
2576 if (!have_inferiors ())
2578 init_thread_list (); /* Destroy thread info. */
2580 /* Killing off the inferior can leave us with a core file. If
2581 so, print the state we are left in. */
2582 if (target_has_stack
)
2584 printf_filtered (_("In %s,\n"), target_longname
);
2585 print_stack_frame (get_selected_frame (NULL
), 1, SRC_AND_LOC
, 1);
2588 bfd_cache_close_all ();
2591 /* Used in `attach&' command. ARG is a point to an integer
2592 representing a process id. Proceed threads of this process iff
2593 they stopped due to debugger request, and when they did, they
2594 reported a clean stop (GDB_SIGNAL_0). Do not proceed threads
2595 that have been explicitly been told to stop. */
2598 proceed_after_attach_callback (struct thread_info
*thread
,
2601 int pid
= * (int *) arg
;
2603 if (ptid_get_pid (thread
->ptid
) == pid
2604 && !is_exited (thread
->ptid
)
2605 && !is_executing (thread
->ptid
)
2606 && !thread
->stop_requested
2607 && thread
->suspend
.stop_signal
== GDB_SIGNAL_0
)
2609 switch_to_thread (thread
->ptid
);
2610 clear_proceed_status (0);
2611 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
2618 proceed_after_attach (int pid
)
2620 /* Don't error out if the current thread is running, because
2621 there may be other stopped threads. */
2622 struct cleanup
*old_chain
;
2624 /* Backup current thread and selected frame. */
2625 old_chain
= make_cleanup_restore_current_thread ();
2627 iterate_over_threads (proceed_after_attach_callback
, &pid
);
2629 /* Restore selected ptid. */
2630 do_cleanups (old_chain
);
2633 /* See inferior.h. */
2636 setup_inferior (int from_tty
)
2638 struct inferior
*inferior
;
2640 inferior
= current_inferior ();
2641 inferior
->needs_setup
= 0;
2643 /* If no exec file is yet known, try to determine it from the
2645 if (get_exec_file (0) == NULL
)
2646 exec_file_locate_attach (ptid_get_pid (inferior_ptid
), 1, from_tty
);
2649 reopen_exec_file ();
2653 /* Take any necessary post-attaching actions for this platform. */
2654 target_post_attach (ptid_get_pid (inferior_ptid
));
2656 post_create_inferior (¤t_target
, from_tty
);
2659 /* What to do after the first program stops after attaching. */
2660 enum attach_post_wait_mode
2662 /* Do nothing. Leaves threads as they are. */
2663 ATTACH_POST_WAIT_NOTHING
,
2665 /* Re-resume threads that are marked running. */
2666 ATTACH_POST_WAIT_RESUME
,
2668 /* Stop all threads. */
2669 ATTACH_POST_WAIT_STOP
,
2672 /* Called after we've attached to a process and we've seen it stop for
2673 the first time. If ASYNC_EXEC is true, re-resume threads that
2674 should be running. Else if ATTACH, */
2677 attach_post_wait (const char *args
, int from_tty
, enum attach_post_wait_mode mode
)
2679 struct inferior
*inferior
;
2681 inferior
= current_inferior ();
2682 inferior
->control
.stop_soon
= NO_STOP_QUIETLY
;
2684 if (inferior
->needs_setup
)
2685 setup_inferior (from_tty
);
2687 if (mode
== ATTACH_POST_WAIT_RESUME
)
2689 /* The user requested an `attach&', so be sure to leave threads
2690 that didn't get a signal running. */
2692 /* Immediatelly resume all suspended threads of this inferior,
2693 and this inferior only. This should have no effect on
2694 already running threads. If a thread has been stopped with a
2695 signal, leave it be. */
2697 proceed_after_attach (inferior
->pid
);
2700 if (inferior_thread ()->suspend
.stop_signal
== GDB_SIGNAL_0
)
2702 clear_proceed_status (0);
2703 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
2707 else if (mode
== ATTACH_POST_WAIT_STOP
)
2709 /* The user requested a plain `attach', so be sure to leave
2710 the inferior stopped. */
2712 /* At least the current thread is already stopped. */
2714 /* In all-stop, by definition, all threads have to be already
2715 stopped at this point. In non-stop, however, although the
2716 selected thread is stopped, others may still be executing.
2717 Be sure to explicitly stop all threads of the process. This
2718 should have no effect on already stopped threads. */
2720 target_stop (pid_to_ptid (inferior
->pid
));
2721 else if (target_is_non_stop_p ())
2723 struct thread_info
*thread
;
2724 struct thread_info
*lowest
= inferior_thread ();
2725 int pid
= current_inferior ()->pid
;
2727 stop_all_threads ();
2729 /* It's not defined which thread will report the attach
2730 stop. For consistency, always select the thread with
2731 lowest GDB number, which should be the main thread, if it
2733 ALL_NON_EXITED_THREADS (thread
)
2735 if (ptid_get_pid (thread
->ptid
) == pid
)
2737 if (thread
->inf
->num
< lowest
->inf
->num
2738 || thread
->per_inf_num
< lowest
->per_inf_num
)
2743 switch_to_thread (lowest
->ptid
);
2746 /* Tell the user/frontend where we're stopped. */
2748 if (deprecated_attach_hook
)
2749 deprecated_attach_hook ();
2753 struct attach_command_continuation_args
2757 enum attach_post_wait_mode mode
;
2761 attach_command_continuation (void *args
, int err
)
2763 struct attach_command_continuation_args
*a
2764 = (struct attach_command_continuation_args
*) args
;
2769 attach_post_wait (a
->args
, a
->from_tty
, a
->mode
);
2773 attach_command_continuation_free_args (void *args
)
2775 struct attach_command_continuation_args
*a
2776 = (struct attach_command_continuation_args
*) args
;
2782 /* "attach" command entry point. Takes a program started up outside
2783 of gdb and ``attaches'' to it. This stops it cold in its tracks
2784 and allows us to start debugging it. */
2787 attach_command (char *args
, int from_tty
)
2790 struct cleanup
*args_chain
;
2791 struct target_ops
*attach_target
;
2792 struct inferior
*inferior
= current_inferior ();
2793 enum attach_post_wait_mode mode
;
2795 dont_repeat (); /* Not for the faint of heart */
2797 if (gdbarch_has_global_solist (target_gdbarch ()))
2798 /* Don't complain if all processes share the same symbol
2801 else if (target_has_execution
)
2803 if (query (_("A program is being debugged already. Kill it? ")))
2806 error (_("Not killed."));
2809 /* Clean up any leftovers from other runs. Some other things from
2810 this function should probably be moved into target_pre_inferior. */
2811 target_pre_inferior (from_tty
);
2813 args
= strip_bg_char (args
, &async_exec
);
2814 args_chain
= make_cleanup (xfree
, args
);
2816 attach_target
= find_attach_target ();
2818 prepare_execution_command (attach_target
, async_exec
);
2820 if (non_stop
&& !attach_target
->to_supports_non_stop (attach_target
))
2821 error (_("Cannot attach to this target in non-stop mode"));
2823 attach_target
->to_attach (attach_target
, args
, from_tty
);
2824 /* to_attach should push the target, so after this point we
2825 shouldn't refer to attach_target again. */
2826 attach_target
= NULL
;
2828 /* Set up the "saved terminal modes" of the inferior
2829 based on what modes we are starting it with. */
2830 target_terminal_init ();
2832 /* Install inferior's terminal modes. This may look like a no-op,
2833 as we've just saved them above, however, this does more than
2834 restore terminal settings:
2836 - installs a SIGINT handler that forwards SIGINT to the inferior.
2837 Otherwise a Ctrl-C pressed just while waiting for the initial
2838 stop would end up as a spurious Quit.
2840 - removes stdin from the event loop, which we need if attaching
2841 in the foreground, otherwise on targets that report an initial
2842 stop on attach (which are most) we'd process input/commands
2843 while we're in the event loop waiting for that stop. That is,
2844 before the attach continuation runs and the command is really
2846 target_terminal_inferior ();
2848 /* Set up execution context to know that we should return from
2849 wait_for_inferior as soon as the target reports a stop. */
2850 init_wait_for_inferior ();
2851 clear_proceed_status (0);
2853 inferior
->needs_setup
= 1;
2855 if (target_is_non_stop_p ())
2857 /* If we find that the current thread isn't stopped, explicitly
2858 do so now, because we're going to install breakpoints and
2862 /* The user requested an `attach&'; stop just one thread. */
2863 target_stop (inferior_ptid
);
2865 /* The user requested an `attach', so stop all threads of this
2867 target_stop (pid_to_ptid (ptid_get_pid (inferior_ptid
)));
2870 mode
= async_exec
? ATTACH_POST_WAIT_RESUME
: ATTACH_POST_WAIT_STOP
;
2872 /* Some system don't generate traps when attaching to inferior.
2873 E.g. Mach 3 or GNU hurd. */
2874 if (!target_attach_no_wait
)
2876 struct attach_command_continuation_args
*a
;
2878 /* Careful here. See comments in inferior.h. Basically some
2879 OSes don't ignore SIGSTOPs on continue requests anymore. We
2880 need a way for handle_inferior_event to reset the stop_signal
2881 variable after an attach, and this is what
2882 STOP_QUIETLY_NO_SIGSTOP is for. */
2883 inferior
->control
.stop_soon
= STOP_QUIETLY_NO_SIGSTOP
;
2885 /* Wait for stop. */
2886 a
= XNEW (struct attach_command_continuation_args
);
2887 a
->args
= xstrdup (args
);
2888 a
->from_tty
= from_tty
;
2890 add_inferior_continuation (attach_command_continuation
, a
,
2891 attach_command_continuation_free_args
);
2892 /* Done with ARGS. */
2893 do_cleanups (args_chain
);
2895 if (!target_is_async_p ())
2896 mark_infrun_async_event_handler ();
2900 /* Done with ARGS. */
2901 do_cleanups (args_chain
);
2903 attach_post_wait (args
, from_tty
, mode
);
2906 /* We had just found out that the target was already attached to an
2907 inferior. PTID points at a thread of this new inferior, that is
2908 the most likely to be stopped right now, but not necessarily so.
2909 The new inferior is assumed to be already added to the inferior
2910 list at this point. If LEAVE_RUNNING, then leave the threads of
2911 this inferior running, except those we've explicitly seen reported
2915 notice_new_inferior (ptid_t ptid
, int leave_running
, int from_tty
)
2917 struct cleanup
* old_chain
;
2918 enum attach_post_wait_mode mode
;
2920 old_chain
= make_cleanup (null_cleanup
, NULL
);
2922 mode
= leave_running
? ATTACH_POST_WAIT_RESUME
: ATTACH_POST_WAIT_NOTHING
;
2924 if (!ptid_equal (inferior_ptid
, null_ptid
))
2925 make_cleanup_restore_current_thread ();
2927 /* Avoid reading registers -- we haven't fetched the target
2929 switch_to_thread_no_regs (find_thread_ptid (ptid
));
2931 /* When we "notice" a new inferior we need to do all the things we
2932 would normally do if we had just attached to it. */
2934 if (is_executing (inferior_ptid
))
2936 struct attach_command_continuation_args
*a
;
2937 struct inferior
*inferior
= current_inferior ();
2939 /* We're going to install breakpoints, and poke at memory,
2940 ensure that the inferior is stopped for a moment while we do
2942 target_stop (inferior_ptid
);
2944 inferior
->control
.stop_soon
= STOP_QUIETLY_REMOTE
;
2946 /* Wait for stop before proceeding. */
2947 a
= XNEW (struct attach_command_continuation_args
);
2948 a
->args
= xstrdup ("");
2949 a
->from_tty
= from_tty
;
2951 add_inferior_continuation (attach_command_continuation
, a
,
2952 attach_command_continuation_free_args
);
2954 do_cleanups (old_chain
);
2958 attach_post_wait ("" /* args */, from_tty
, mode
);
2960 do_cleanups (old_chain
);
2965 * takes a program previously attached to and detaches it.
2966 * The program resumes execution and will no longer stop
2967 * on signals, etc. We better not have left any breakpoints
2968 * in the program or it'll die when it hits one. For this
2969 * to work, it may be necessary for the process to have been
2970 * previously attached. It *might* work if the program was
2971 * started via the normal ptrace (PTRACE_TRACEME).
2975 detach_command (char *args
, int from_tty
)
2977 dont_repeat (); /* Not for the faint of heart. */
2979 if (ptid_equal (inferior_ptid
, null_ptid
))
2980 error (_("The program is not being run."));
2982 query_if_trace_running (from_tty
);
2984 disconnect_tracing ();
2986 target_detach (args
, from_tty
);
2988 /* The current inferior process was just detached successfully. Get
2989 rid of breakpoints that no longer make sense. Note we don't do
2990 this within target_detach because that is also used when
2991 following child forks, and in that case we will want to transfer
2992 breakpoints to the child, not delete them. */
2993 breakpoint_init_inferior (inf_exited
);
2995 /* If the solist is global across inferiors, don't clear it when we
2996 detach from a single inferior. */
2997 if (!gdbarch_has_global_solist (target_gdbarch ()))
2998 no_shared_libraries (NULL
, from_tty
);
3000 /* If we still have inferiors to debug, then don't mess with their
3002 if (!have_inferiors ())
3003 init_thread_list ();
3005 if (deprecated_detach_hook
)
3006 deprecated_detach_hook ();
3009 /* Disconnect from the current target without resuming it (leaving it
3010 waiting for a debugger).
3012 We'd better not have left any breakpoints in the program or the
3013 next debugger will get confused. Currently only supported for some
3014 remote targets, since the normal attach mechanisms don't work on
3015 stopped processes on some native platforms (e.g. GNU/Linux). */
3018 disconnect_command (char *args
, int from_tty
)
3020 dont_repeat (); /* Not for the faint of heart. */
3021 query_if_trace_running (from_tty
);
3022 disconnect_tracing ();
3023 target_disconnect (args
, from_tty
);
3024 no_shared_libraries (NULL
, from_tty
);
3025 init_thread_list ();
3026 if (deprecated_detach_hook
)
3027 deprecated_detach_hook ();
3031 interrupt_target_1 (int all_threads
)
3036 ptid
= minus_one_ptid
;
3038 ptid
= inferior_ptid
;
3043 target_interrupt (ptid
);
3045 /* Tag the thread as having been explicitly requested to stop, so
3046 other parts of gdb know not to resume this thread automatically,
3047 if it was stopped due to an internal event. Limit this to
3048 non-stop mode, as when debugging a multi-threaded application in
3049 all-stop mode, we will only get one stop event --- it's undefined
3050 which thread will report the event. */
3052 set_stop_requested (ptid
, 1);
3056 Stop the execution of the target while running in async mode, in
3057 the background. In all-stop, stop the whole process. In non-stop
3058 mode, stop the current thread only by default, or stop all threads
3059 if the `-a' switch is used. */
3062 interrupt_command (char *args
, int from_tty
)
3064 if (target_can_async_p ())
3066 int all_threads
= 0;
3068 dont_repeat (); /* Not for the faint of heart. */
3071 && startswith (args
, "-a"))
3074 if (!non_stop
&& all_threads
)
3075 error (_("-a is meaningless in all-stop mode."));
3077 interrupt_target_1 (all_threads
);
3081 /* See inferior.h. */
3084 default_print_float_info (struct gdbarch
*gdbarch
, struct ui_file
*file
,
3085 struct frame_info
*frame
, const char *args
)
3088 int printed_something
= 0;
3091 regnum
< gdbarch_num_regs (gdbarch
)
3092 + gdbarch_num_pseudo_regs (gdbarch
);
3095 if (gdbarch_register_reggroup_p (gdbarch
, regnum
, float_reggroup
))
3097 printed_something
= 1;
3098 gdbarch_print_registers_info (gdbarch
, file
, frame
, regnum
, 1);
3101 if (!printed_something
)
3102 fprintf_filtered (file
, "No floating-point info "
3103 "available for this processor.\n");
3107 float_info (char *args
, int from_tty
)
3109 struct frame_info
*frame
;
3111 if (!target_has_registers
)
3112 error (_("The program has no registers now."));
3114 frame
= get_selected_frame (NULL
);
3115 gdbarch_print_float_info (get_frame_arch (frame
), gdb_stdout
, frame
, args
);
3119 unset_command (char *args
, int from_tty
)
3121 printf_filtered (_("\"unset\" must be followed by the "
3122 "name of an unset subcommand.\n"));
3123 help_list (unsetlist
, "unset ", all_commands
, gdb_stdout
);
3126 /* Implement `info proc' family of commands. */
3129 info_proc_cmd_1 (char *args
, enum info_proc_what what
, int from_tty
)
3131 struct gdbarch
*gdbarch
= get_current_arch ();
3133 if (!target_info_proc (args
, what
))
3135 if (gdbarch_info_proc_p (gdbarch
))
3136 gdbarch_info_proc (gdbarch
, args
, what
);
3138 error (_("Not supported on this target."));
3142 /* Implement `info proc' when given without any futher parameters. */
3145 info_proc_cmd (char *args
, int from_tty
)
3147 info_proc_cmd_1 (args
, IP_MINIMAL
, from_tty
);
3150 /* Implement `info proc mappings'. */
3153 info_proc_cmd_mappings (char *args
, int from_tty
)
3155 info_proc_cmd_1 (args
, IP_MAPPINGS
, from_tty
);
3158 /* Implement `info proc stat'. */
3161 info_proc_cmd_stat (char *args
, int from_tty
)
3163 info_proc_cmd_1 (args
, IP_STAT
, from_tty
);
3166 /* Implement `info proc status'. */
3169 info_proc_cmd_status (char *args
, int from_tty
)
3171 info_proc_cmd_1 (args
, IP_STATUS
, from_tty
);
3174 /* Implement `info proc cwd'. */
3177 info_proc_cmd_cwd (char *args
, int from_tty
)
3179 info_proc_cmd_1 (args
, IP_CWD
, from_tty
);
3182 /* Implement `info proc cmdline'. */
3185 info_proc_cmd_cmdline (char *args
, int from_tty
)
3187 info_proc_cmd_1 (args
, IP_CMDLINE
, from_tty
);
3190 /* Implement `info proc exe'. */
3193 info_proc_cmd_exe (char *args
, int from_tty
)
3195 info_proc_cmd_1 (args
, IP_EXE
, from_tty
);
3198 /* Implement `info proc all'. */
3201 info_proc_cmd_all (char *args
, int from_tty
)
3203 info_proc_cmd_1 (args
, IP_ALL
, from_tty
);
3207 _initialize_infcmd (void)
3209 static struct cmd_list_element
*info_proc_cmdlist
;
3210 struct cmd_list_element
*c
= NULL
;
3211 const char *cmd_name
;
3213 /* Add the filename of the terminal connected to inferior I/O. */
3214 add_setshow_optional_filename_cmd ("inferior-tty", class_run
,
3215 &inferior_io_terminal_scratch
, _("\
3216 Set terminal for future runs of program being debugged."), _("\
3217 Show terminal for future runs of program being debugged."), _("\
3218 Usage: set inferior-tty [TTY]\n\n\
3219 If TTY is omitted, the default behavior of using the same terminal as GDB\n\
3221 set_inferior_tty_command
,
3222 show_inferior_tty_command
,
3223 &setlist
, &showlist
);
3224 add_com_alias ("tty", "set inferior-tty", class_alias
, 0);
3227 add_setshow_string_noescape_cmd (cmd_name
, class_run
,
3228 &inferior_args_scratch
, _("\
3229 Set argument list to give program being debugged when it is started."), _("\
3230 Show argument list to give program being debugged when it is started."), _("\
3231 Follow this command with any number of args, to be passed to the program."),
3234 &setlist
, &showlist
);
3235 c
= lookup_cmd (&cmd_name
, setlist
, "", -1, 1);
3236 gdb_assert (c
!= NULL
);
3237 set_cmd_completer (c
, filename_completer
);
3239 c
= add_cmd ("environment", no_class
, environment_info
, _("\
3240 The environment to give the program, or one variable's value.\n\
3241 With an argument VAR, prints the value of environment variable VAR to\n\
3242 give the program being debugged. With no arguments, prints the entire\n\
3243 environment to be given to the program."), &showlist
);
3244 set_cmd_completer (c
, noop_completer
);
3246 add_prefix_cmd ("unset", no_class
, unset_command
,
3247 _("Complement to certain \"set\" commands."),
3248 &unsetlist
, "unset ", 0, &cmdlist
);
3250 c
= add_cmd ("environment", class_run
, unset_environment_command
, _("\
3251 Cancel environment variable VAR for the program.\n\
3252 This does not affect the program until the next \"run\" command."),
3254 set_cmd_completer (c
, noop_completer
);
3256 c
= add_cmd ("environment", class_run
, set_environment_command
, _("\
3257 Set environment variable value to give the program.\n\
3258 Arguments are VAR VALUE where VAR is variable name and VALUE is value.\n\
3259 VALUES of environment variables are uninterpreted strings.\n\
3260 This does not affect the program until the next \"run\" command."),
3262 set_cmd_completer (c
, noop_completer
);
3264 c
= add_com ("path", class_files
, path_command
, _("\
3265 Add directory DIR(s) to beginning of search path for object files.\n\
3266 $cwd in the path means the current working directory.\n\
3267 This path is equivalent to the $PATH shell variable. It is a list of\n\
3268 directories, separated by colons. These directories are searched to find\n\
3269 fully linked executable files and separately compiled object files as \
3271 set_cmd_completer (c
, filename_completer
);
3273 c
= add_cmd ("paths", no_class
, path_info
, _("\
3274 Current search path for finding object files.\n\
3275 $cwd in the path means the current working directory.\n\
3276 This path is equivalent to the $PATH shell variable. It is a list of\n\
3277 directories, separated by colons. These directories are searched to find\n\
3278 fully linked executable files and separately compiled object files as \
3281 set_cmd_completer (c
, noop_completer
);
3283 add_prefix_cmd ("kill", class_run
, kill_command
,
3284 _("Kill execution of program being debugged."),
3285 &killlist
, "kill ", 0, &cmdlist
);
3287 add_com ("attach", class_run
, attach_command
, _("\
3288 Attach to a process or file outside of GDB.\n\
3289 This command attaches to another target, of the same type as your last\n\
3290 \"target\" command (\"info files\" will show your target stack).\n\
3291 The command may take as argument a process id or a device file.\n\
3292 For a process id, you must have permission to send the process a signal,\n\
3293 and it must have the same effective uid as the debugger.\n\
3294 When using \"attach\" with a process id, the debugger finds the\n\
3295 program running in the process, looking first in the current working\n\
3296 directory, or (if not found there) using the source file search path\n\
3297 (see the \"directory\" command). You can also use the \"file\" command\n\
3298 to specify the program, and to load its symbol table."));
3300 add_prefix_cmd ("detach", class_run
, detach_command
, _("\
3301 Detach a process or file previously attached.\n\
3302 If a process, it is no longer traced, and it continues its execution. If\n\
3303 you were debugging a file, the file is closed and gdb no longer accesses it."),
3304 &detachlist
, "detach ", 0, &cmdlist
);
3306 add_com ("disconnect", class_run
, disconnect_command
, _("\
3307 Disconnect from a target.\n\
3308 The target will wait for another debugger to connect. Not available for\n\
3311 c
= add_com ("signal", class_run
, signal_command
, _("\
3312 Continue program with the specified signal.\n\
3313 Usage: signal SIGNAL\n\
3314 The SIGNAL argument is processed the same as the handle command.\n\
3316 An argument of \"0\" means continue the program without sending it a signal.\n\
3317 This is useful in cases where the program stopped because of a signal,\n\
3318 and you want to resume the program while discarding the signal.\n\
3320 In a multi-threaded program the signal is delivered to, or discarded from,\n\
3321 the current thread only."));
3322 set_cmd_completer (c
, signal_completer
);
3324 c
= add_com ("queue-signal", class_run
, queue_signal_command
, _("\
3325 Queue a signal to be delivered to the current thread when it is resumed.\n\
3326 Usage: queue-signal SIGNAL\n\
3327 The SIGNAL argument is processed the same as the handle command.\n\
3328 It is an error if the handling state of SIGNAL is \"nopass\".\n\
3330 An argument of \"0\" means remove any currently queued signal from\n\
3331 the current thread. This is useful in cases where the program stopped\n\
3332 because of a signal, and you want to resume it while discarding the signal.\n\
3334 In a multi-threaded program the signal is queued with, or discarded from,\n\
3335 the current thread only."));
3336 set_cmd_completer (c
, signal_completer
);
3338 add_com ("stepi", class_run
, stepi_command
, _("\
3339 Step one instruction exactly.\n\
3341 Argument N means step N times (or till program stops for another \
3343 add_com_alias ("si", "stepi", class_alias
, 0);
3345 add_com ("nexti", class_run
, nexti_command
, _("\
3346 Step one instruction, but proceed through subroutine calls.\n\
3348 Argument N means step N times (or till program stops for another \
3350 add_com_alias ("ni", "nexti", class_alias
, 0);
3352 add_com ("finish", class_run
, finish_command
, _("\
3353 Execute until selected stack frame returns.\n\
3355 Upon return, the value returned is printed and put in the value history."));
3356 add_com_alias ("fin", "finish", class_run
, 1);
3358 add_com ("next", class_run
, next_command
, _("\
3359 Step program, proceeding through subroutine calls.\n\
3361 Unlike \"step\", if the current source line calls a subroutine,\n\
3362 this command does not enter the subroutine, but instead steps over\n\
3363 the call, in effect treating it as a single source line."));
3364 add_com_alias ("n", "next", class_run
, 1);
3366 add_com ("step", class_run
, step_command
, _("\
3367 Step program until it reaches a different source line.\n\
3369 Argument N means step N times (or till program stops for another \
3371 add_com_alias ("s", "step", class_run
, 1);
3373 c
= add_com ("until", class_run
, until_command
, _("\
3374 Execute until the program reaches a source line greater than the current\n\
3375 or a specified location (same args as break command) within the current \
3377 set_cmd_completer (c
, location_completer
);
3378 add_com_alias ("u", "until", class_run
, 1);
3380 c
= add_com ("advance", class_run
, advance_command
, _("\
3381 Continue the program up to the given location (same form as args for break \
3383 Execution will also stop upon exit from the current stack frame."));
3384 set_cmd_completer (c
, location_completer
);
3386 c
= add_com ("jump", class_run
, jump_command
, _("\
3387 Continue program being debugged at specified line or address.\n\
3388 Usage: jump <location>\n\
3389 Give as argument either LINENUM or *ADDR, where ADDR is an expression\n\
3390 for an address to start at."));
3391 set_cmd_completer (c
, location_completer
);
3392 add_com_alias ("j", "jump", class_run
, 1);
3394 add_com ("continue", class_run
, continue_command
, _("\
3395 Continue program being debugged, after signal or breakpoint.\n\
3396 Usage: continue [N]\n\
3397 If proceeding from breakpoint, a number N may be used as an argument,\n\
3398 which means to set the ignore count of that breakpoint to N - 1 (so that\n\
3399 the breakpoint won't break until the Nth time it is reached).\n\
3401 If non-stop mode is enabled, continue only the current thread,\n\
3402 otherwise all the threads in the program are continued. To \n\
3403 continue all stopped threads in non-stop mode, use the -a option.\n\
3404 Specifying -a and an ignore count simultaneously is an error."));
3405 add_com_alias ("c", "cont", class_run
, 1);
3406 add_com_alias ("fg", "cont", class_run
, 1);
3408 c
= add_com ("run", class_run
, run_command
, _("\
3409 Start debugged program. You may specify arguments to give it.\n\
3410 Args may include \"*\", or \"[...]\"; they are expanded using \"sh\".\n\
3411 Input and output redirection with \">\", \"<\", or \">>\" are also \
3413 With no arguments, uses arguments last specified (with \"run\" \
3414 or \"set args\").\n\
3415 To cancel previous arguments and run with no arguments,\n\
3416 use \"set args\" without arguments."));
3417 set_cmd_completer (c
, filename_completer
);
3418 add_com_alias ("r", "run", class_run
, 1);
3420 c
= add_com ("start", class_run
, start_command
, _("\
3421 Run the debugged program until the beginning of the main procedure.\n\
3422 You may specify arguments to give to your program, just as with the\n\
3423 \"run\" command."));
3424 set_cmd_completer (c
, filename_completer
);
3426 add_com ("interrupt", class_run
, interrupt_command
,
3427 _("Interrupt the execution of the debugged program.\n\
3428 If non-stop mode is enabled, interrupt only the current thread,\n\
3429 otherwise all the threads in the program are stopped. To \n\
3430 interrupt all running threads in non-stop mode, use the -a option."));
3432 c
= add_info ("registers", nofp_registers_info
, _("\
3433 List of integer registers and their contents, for selected stack frame.\n\
3434 Register name as argument means describe only that register."));
3435 add_info_alias ("r", "registers", 1);
3436 set_cmd_completer (c
, reg_or_group_completer
);
3438 c
= add_info ("all-registers", all_registers_info
, _("\
3439 List of all registers and their contents, for selected stack frame.\n\
3440 Register name as argument means describe only that register."));
3441 set_cmd_completer (c
, reg_or_group_completer
);
3443 add_info ("program", program_info
,
3444 _("Execution status of the program."));
3446 add_info ("float", float_info
,
3447 _("Print the status of the floating point unit\n"));
3449 add_info ("vector", vector_info
,
3450 _("Print the status of the vector unit\n"));
3452 add_prefix_cmd ("proc", class_info
, info_proc_cmd
,
3454 Show /proc process information about any running process.\n\
3455 Specify any process id, or use the program being debugged by default."),
3456 &info_proc_cmdlist
, "info proc ",
3457 1/*allow-unknown*/, &infolist
);
3459 add_cmd ("mappings", class_info
, info_proc_cmd_mappings
, _("\
3460 List of mapped memory regions."),
3461 &info_proc_cmdlist
);
3463 add_cmd ("stat", class_info
, info_proc_cmd_stat
, _("\
3464 List process info from /proc/PID/stat."),
3465 &info_proc_cmdlist
);
3467 add_cmd ("status", class_info
, info_proc_cmd_status
, _("\
3468 List process info from /proc/PID/status."),
3469 &info_proc_cmdlist
);
3471 add_cmd ("cwd", class_info
, info_proc_cmd_cwd
, _("\
3472 List current working directory of the process."),
3473 &info_proc_cmdlist
);
3475 add_cmd ("cmdline", class_info
, info_proc_cmd_cmdline
, _("\
3476 List command line arguments of the process."),
3477 &info_proc_cmdlist
);
3479 add_cmd ("exe", class_info
, info_proc_cmd_exe
, _("\
3480 List absolute filename for executable of the process."),
3481 &info_proc_cmdlist
);
3483 add_cmd ("all", class_info
, info_proc_cmd_all
, _("\
3484 List all available /proc info."),
3485 &info_proc_cmdlist
);