1 /* Memory-access and commands for "inferior" process, for GDB.
3 Copyright (C) 1986-2016 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 char *special
= "\"!&*|[]{}<>?`~^=;, \t\n";
265 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 char *special
= "\"!#$&*()\\|[]{}<>?'`~^; \t\n";
271 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, target
, 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
)
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
= (char *) 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
, get_inferior_args (),
611 environ_vector (current_inferior ()->environment
),
613 /* to_create_inferior should push the target, so after this point we
614 shouldn't refer to run_target again. */
617 /* We're starting off a new process. When we get out of here, in
618 non-stop mode, finish the state of all threads of that process,
619 but leave other threads alone, as they may be stopped in internal
620 events --- the frontend shouldn't see them as stopped. In
621 all-stop, always finish the state of all threads, as we may be
622 resuming more than just the new process. */
624 ptid
= pid_to_ptid (ptid_get_pid (inferior_ptid
));
626 ptid
= minus_one_ptid
;
627 old_chain
= make_cleanup (finish_thread_state_cleanup
, &ptid
);
629 /* Pass zero for FROM_TTY, because at this point the "run" command
630 has done its thing; now we are setting up the running program. */
631 post_create_inferior (¤t_target
, 0);
633 /* Start the target running. Do not use -1 continuation as it would skip
634 breakpoint right at the entry point. */
635 proceed (regcache_read_pc (get_current_regcache ()), GDB_SIGNAL_0
);
637 /* Since there was no error, there's no need to finish the thread
639 discard_cleanups (old_chain
);
643 run_command (char *args
, int from_tty
)
645 run_command_1 (args
, from_tty
, 0);
648 /* Start the execution of the program up until the beginning of the main
652 start_command (char *args
, int from_tty
)
654 /* Some languages such as Ada need to search inside the program
655 minimal symbols for the location where to put the temporary
656 breakpoint before starting. */
657 if (!have_minimal_symbols ())
658 error (_("No symbol table loaded. Use the \"file\" command."));
660 /* Run the program until reaching the main procedure... */
661 run_command_1 (args
, from_tty
, 1);
665 proceed_thread_callback (struct thread_info
*thread
, void *arg
)
667 /* We go through all threads individually instead of compressing
668 into a single target `resume_all' request, because some threads
669 may be stopped in internal breakpoints/events, or stopped waiting
670 for its turn in the displaced stepping queue (that is, they are
671 running && !executing). The target side has no idea about why
672 the thread is stopped, so a `resume_all' command would resume too
673 much. If/when GDB gains a way to tell the target `hold this
674 thread stopped until I say otherwise', then we can optimize
676 if (!is_stopped (thread
->ptid
))
679 switch_to_thread (thread
->ptid
);
680 clear_proceed_status (0);
681 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
686 ensure_valid_thread (void)
688 if (ptid_equal (inferior_ptid
, null_ptid
)
689 || is_exited (inferior_ptid
))
690 error (_("Cannot execute this command without a live selected thread."));
693 /* If the user is looking at trace frames, any resumption of execution
694 is likely to mix up recorded and live target data. So simply
695 disallow those commands. */
698 ensure_not_tfind_mode (void)
700 if (get_traceframe_number () >= 0)
701 error (_("Cannot execute this command while looking at trace frames."));
704 /* Throw an error indicating the current thread is running. */
707 error_is_running (void)
709 error (_("Cannot execute this command while "
710 "the selected thread is running."));
713 /* Calls error_is_running if the current thread is running. */
716 ensure_not_running (void)
718 if (is_running (inferior_ptid
))
723 continue_1 (int all_threads
)
726 ensure_not_tfind_mode ();
728 if (non_stop
&& all_threads
)
730 /* Don't error out if the current thread is running, because
731 there may be other stopped threads. */
732 struct cleanup
*old_chain
;
734 /* Backup current thread and selected frame. */
735 old_chain
= make_cleanup_restore_current_thread ();
737 iterate_over_threads (proceed_thread_callback
, NULL
);
739 if (current_ui
->prompt_state
== PROMPT_BLOCKED
)
741 /* If all threads in the target were already running,
742 proceed_thread_callback ends up never calling proceed,
743 and so nothing calls this to put the inferior's terminal
744 settings in effect and remove stdin from the event loop,
745 which we must when running a foreground command. E.g.:
749 <all threads are running now>
752 <no thread was resumed, but the inferior now owns the terminal>
754 target_terminal_inferior ();
757 /* Restore selected ptid. */
758 do_cleanups (old_chain
);
762 ensure_valid_thread ();
763 ensure_not_running ();
764 clear_proceed_status (0);
765 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
769 /* continue [-a] [proceed-count] [&] */
772 continue_command (char *args
, int from_tty
)
776 struct cleanup
*args_chain
;
780 /* Find out whether we must run in the background. */
781 args
= strip_bg_char (args
, &async_exec
);
782 args_chain
= make_cleanup (xfree
, args
);
786 if (startswith (args
, "-a"))
789 args
+= sizeof ("-a") - 1;
795 if (!non_stop
&& all_threads
)
796 error (_("`-a' is meaningless in all-stop mode."));
798 if (args
!= NULL
&& all_threads
)
799 error (_("Can't resume all threads and specify "
800 "proceed count simultaneously."));
802 /* If we have an argument left, set proceed count of breakpoint we
809 struct thread_info
*tp
;
812 tp
= find_thread_ptid (inferior_ptid
);
816 struct target_waitstatus ws
;
818 get_last_target_status (&last_ptid
, &ws
);
819 tp
= find_thread_ptid (last_ptid
);
822 bs
= tp
->control
.stop_bpstat
;
824 while ((stat
= bpstat_num (&bs
, &num
)) != 0)
827 set_ignore_count (num
,
828 parse_and_eval_long (args
) - 1,
830 /* set_ignore_count prints a message ending with a period.
831 So print two spaces before "Continuing.". */
833 printf_filtered (" ");
837 if (!stopped
&& from_tty
)
840 ("Not stopped at any breakpoint; argument ignored.\n");
844 /* Done with ARGS. */
845 do_cleanups (args_chain
);
848 ensure_not_tfind_mode ();
850 if (!non_stop
|| !all_threads
)
852 ensure_valid_thread ();
853 ensure_not_running ();
856 prepare_execution_command (¤t_target
, async_exec
);
859 printf_filtered (_("Continuing.\n"));
861 continue_1 (all_threads
);
864 /* Record the starting point of a "step" or "next" command. */
867 set_step_frame (void)
869 struct symtab_and_line sal
;
871 struct frame_info
*frame
= get_current_frame ();
872 struct thread_info
*tp
= inferior_thread ();
874 find_frame_sal (frame
, &sal
);
875 set_step_info (frame
, sal
);
876 pc
= get_frame_pc (frame
);
877 tp
->control
.step_start_function
= find_pc_function (pc
);
880 /* Step until outside of current statement. */
883 step_command (char *count_string
, int from_tty
)
885 step_1 (0, 0, count_string
);
888 /* Likewise, but skip over subroutine calls as if single instructions. */
891 next_command (char *count_string
, int from_tty
)
893 step_1 (1, 0, count_string
);
896 /* Likewise, but step only one instruction. */
899 stepi_command (char *count_string
, int from_tty
)
901 step_1 (0, 1, count_string
);
905 nexti_command (char *count_string
, int from_tty
)
907 step_1 (1, 1, count_string
);
911 delete_longjmp_breakpoint_cleanup (void *arg
)
913 int thread
= * (int *) arg
;
914 delete_longjmp_breakpoint (thread
);
917 /* Data for the FSM that manages the step/next/stepi/nexti
920 struct step_command_fsm
922 /* The base class. */
923 struct thread_fsm thread_fsm
;
925 /* How many steps left in a "step N"-like command. */
928 /* If true, this is a next/nexti, otherwise a step/stepi. */
929 int skip_subroutines
;
931 /* If true, this is a stepi/nexti, otherwise a step/step. */
935 static void step_command_fsm_clean_up (struct thread_fsm
*self
,
936 struct thread_info
*thread
);
937 static int step_command_fsm_should_stop (struct thread_fsm
*self
,
938 struct thread_info
*thread
);
939 static enum async_reply_reason
940 step_command_fsm_async_reply_reason (struct thread_fsm
*self
);
942 /* step_command_fsm's vtable. */
944 static struct thread_fsm_ops step_command_fsm_ops
=
947 step_command_fsm_clean_up
,
948 step_command_fsm_should_stop
,
949 NULL
, /* return_value */
950 step_command_fsm_async_reply_reason
,
953 /* Allocate a new step_command_fsm. */
955 static struct step_command_fsm
*
956 new_step_command_fsm (struct interp
*cmd_interp
)
958 struct step_command_fsm
*sm
;
960 sm
= XCNEW (struct step_command_fsm
);
961 thread_fsm_ctor (&sm
->thread_fsm
, &step_command_fsm_ops
, cmd_interp
);
966 /* Prepare for a step/next/etc. command. Any target resource
967 allocated here is undone in the FSM's clean_up method. */
970 step_command_fsm_prepare (struct step_command_fsm
*sm
,
971 int skip_subroutines
, int single_inst
,
972 int count
, struct thread_info
*thread
)
974 sm
->skip_subroutines
= skip_subroutines
;
975 sm
->single_inst
= single_inst
;
978 /* Leave the si command alone. */
979 if (!sm
->single_inst
|| sm
->skip_subroutines
)
980 set_longjmp_breakpoint (thread
, get_frame_id (get_current_frame ()));
982 thread
->control
.stepping_command
= 1;
985 static int prepare_one_step (struct step_command_fsm
*sm
);
988 step_1 (int skip_subroutines
, int single_inst
, char *count_string
)
992 struct cleanup
*args_chain
;
993 struct thread_info
*thr
;
994 struct step_command_fsm
*step_sm
;
997 ensure_not_tfind_mode ();
998 ensure_valid_thread ();
999 ensure_not_running ();
1001 count_string
= strip_bg_char (count_string
, &async_exec
);
1002 args_chain
= make_cleanup (xfree
, count_string
);
1004 prepare_execution_command (¤t_target
, async_exec
);
1006 count
= count_string
? parse_and_eval_long (count_string
) : 1;
1008 /* Done with ARGS. */
1009 do_cleanups (args_chain
);
1011 clear_proceed_status (1);
1013 /* Setup the execution command state machine to handle all the COUNT
1015 thr
= inferior_thread ();
1016 step_sm
= new_step_command_fsm (command_interp ());
1017 thr
->thread_fsm
= &step_sm
->thread_fsm
;
1019 step_command_fsm_prepare (step_sm
, skip_subroutines
,
1020 single_inst
, count
, thr
);
1022 /* Do only one step for now, before returning control to the event
1023 loop. Let the continuation figure out how many other steps we
1024 need to do, and handle them one at the time, through
1026 if (!prepare_one_step (step_sm
))
1027 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
1032 /* Stepped into an inline frame. Pretend that we've
1034 thread_fsm_clean_up (thr
->thread_fsm
, thr
);
1035 proceeded
= normal_stop ();
1037 inferior_event_handler (INF_EXEC_COMPLETE
, NULL
);
1038 all_uis_check_sync_execution_done ();
1042 /* Implementation of the 'should_stop' FSM method for stepping
1043 commands. Called after we are done with one step operation, to
1044 check whether we need to step again, before we print the prompt and
1045 return control to the user. If count is > 1, returns false, as we
1046 will need to keep going. */
1049 step_command_fsm_should_stop (struct thread_fsm
*self
, struct thread_info
*tp
)
1051 struct step_command_fsm
*sm
= (struct step_command_fsm
*) self
;
1053 if (tp
->control
.stop_step
)
1055 /* There are more steps to make, and we did stop due to
1056 ending a stepping range. Do another step. */
1057 if (--sm
->count
> 0)
1058 return prepare_one_step (sm
);
1060 thread_fsm_set_finished (self
);
1066 /* Implementation of the 'clean_up' FSM method for stepping commands. */
1069 step_command_fsm_clean_up (struct thread_fsm
*self
, struct thread_info
*thread
)
1071 struct step_command_fsm
*sm
= (struct step_command_fsm
*) self
;
1073 if (!sm
->single_inst
|| sm
->skip_subroutines
)
1074 delete_longjmp_breakpoint (thread
->global_num
);
1077 /* Implementation of the 'async_reply_reason' FSM method for stepping
1080 static enum async_reply_reason
1081 step_command_fsm_async_reply_reason (struct thread_fsm
*self
)
1083 return EXEC_ASYNC_END_STEPPING_RANGE
;
1086 /* Prepare for one step in "step N". The actual target resumption is
1087 done by the caller. Return true if we're done and should thus
1088 report a stop to the user. Returns false if the target needs to be
1092 prepare_one_step (struct step_command_fsm
*sm
)
1096 struct frame_info
*frame
= get_current_frame ();
1098 /* Don't assume THREAD is a valid thread id. It is set to -1 if
1099 the longjmp breakpoint was not required. Use the
1100 INFERIOR_PTID thread instead, which is the same thread when
1102 struct thread_info
*tp
= inferior_thread ();
1106 if (!sm
->single_inst
)
1110 /* Step at an inlined function behaves like "down". */
1111 if (!sm
->skip_subroutines
1112 && inline_skipped_frames (inferior_ptid
))
1116 /* Pretend that we've ran. */
1117 resume_ptid
= user_visible_resume_ptid (1);
1118 set_running (resume_ptid
, 1);
1120 step_into_inline_frame (inferior_ptid
);
1122 return prepare_one_step (sm
);
1125 pc
= get_frame_pc (frame
);
1126 find_pc_line_pc_range (pc
,
1127 &tp
->control
.step_range_start
,
1128 &tp
->control
.step_range_end
);
1130 tp
->control
.may_range_step
= 1;
1132 /* If we have no line info, switch to stepi mode. */
1133 if (tp
->control
.step_range_end
== 0 && step_stop_if_no_debug
)
1135 tp
->control
.step_range_start
= tp
->control
.step_range_end
= 1;
1136 tp
->control
.may_range_step
= 0;
1138 else if (tp
->control
.step_range_end
== 0)
1142 if (find_pc_partial_function (pc
, &name
,
1143 &tp
->control
.step_range_start
,
1144 &tp
->control
.step_range_end
) == 0)
1145 error (_("Cannot find bounds of current function"));
1147 target_terminal_ours_for_output ();
1148 printf_filtered (_("Single stepping until exit from function %s,"
1149 "\nwhich has no line number information.\n"),
1155 /* Say we are stepping, but stop after one insn whatever it does. */
1156 tp
->control
.step_range_start
= tp
->control
.step_range_end
= 1;
1157 if (!sm
->skip_subroutines
)
1159 Don't step over function calls, not even to functions lacking
1161 tp
->control
.step_over_calls
= STEP_OVER_NONE
;
1164 if (sm
->skip_subroutines
)
1165 tp
->control
.step_over_calls
= STEP_OVER_ALL
;
1171 thread_fsm_set_finished (&sm
->thread_fsm
);
1176 /* Continue program at specified address. */
1179 jump_command (char *arg
, int from_tty
)
1181 struct gdbarch
*gdbarch
= get_current_arch ();
1183 struct symtabs_and_lines sals
;
1184 struct symtab_and_line sal
;
1188 struct cleanup
*args_chain
;
1191 ensure_not_tfind_mode ();
1192 ensure_valid_thread ();
1193 ensure_not_running ();
1195 /* Find out whether we must run in the background. */
1196 arg
= strip_bg_char (arg
, &async_exec
);
1197 args_chain
= make_cleanup (xfree
, arg
);
1199 prepare_execution_command (¤t_target
, async_exec
);
1202 error_no_arg (_("starting address"));
1204 sals
= decode_line_with_last_displayed (arg
, DECODE_LINE_FUNFIRSTLINE
);
1205 if (sals
.nelts
!= 1)
1207 error (_("Unreasonable jump request"));
1213 /* Done with ARGS. */
1214 do_cleanups (args_chain
);
1216 if (sal
.symtab
== 0 && sal
.pc
== 0)
1217 error (_("No source file has been specified."));
1219 resolve_sal_pc (&sal
); /* May error out. */
1221 /* See if we are trying to jump to another function. */
1222 fn
= get_frame_function (get_current_frame ());
1223 sfn
= find_pc_function (sal
.pc
);
1224 if (fn
!= NULL
&& sfn
!= fn
)
1226 if (!query (_("Line %d is not in `%s'. Jump anyway? "), sal
.line
,
1227 SYMBOL_PRINT_NAME (fn
)))
1229 error (_("Not confirmed."));
1236 struct obj_section
*section
;
1238 fixup_symbol_section (sfn
, 0);
1239 section
= SYMBOL_OBJ_SECTION (symbol_objfile (sfn
), sfn
);
1240 if (section_is_overlay (section
)
1241 && !section_is_mapped (section
))
1243 if (!query (_("WARNING!!! Destination is in "
1244 "unmapped overlay! Jump anyway? ")))
1246 error (_("Not confirmed."));
1256 printf_filtered (_("Continuing at "));
1257 fputs_filtered (paddress (gdbarch
, addr
), gdb_stdout
);
1258 printf_filtered (".\n");
1261 clear_proceed_status (0);
1262 proceed (addr
, GDB_SIGNAL_0
);
1265 /* Continue program giving it specified signal. */
1268 signal_command (char *signum_exp
, int from_tty
)
1270 enum gdb_signal oursig
;
1272 struct cleanup
*args_chain
;
1274 dont_repeat (); /* Too dangerous. */
1276 ensure_not_tfind_mode ();
1277 ensure_valid_thread ();
1278 ensure_not_running ();
1280 /* Find out whether we must run in the background. */
1281 signum_exp
= strip_bg_char (signum_exp
, &async_exec
);
1282 args_chain
= make_cleanup (xfree
, signum_exp
);
1284 prepare_execution_command (¤t_target
, async_exec
);
1287 error_no_arg (_("signal number"));
1289 /* It would be even slicker to make signal names be valid expressions,
1290 (the type could be "enum $signal" or some such), then the user could
1291 assign them to convenience variables. */
1292 oursig
= gdb_signal_from_name (signum_exp
);
1294 if (oursig
== GDB_SIGNAL_UNKNOWN
)
1296 /* No, try numeric. */
1297 int num
= parse_and_eval_long (signum_exp
);
1300 oursig
= GDB_SIGNAL_0
;
1302 oursig
= gdb_signal_from_command (num
);
1305 do_cleanups (args_chain
);
1307 /* Look for threads other than the current that this command ends up
1308 resuming too (due to schedlock off), and warn if they'll get a
1309 signal delivered. "signal 0" is used to suppress a previous
1310 signal, but if the current thread is no longer the one that got
1311 the signal, then the user is potentially suppressing the signal
1312 of the wrong thread. */
1315 struct thread_info
*tp
;
1317 int must_confirm
= 0;
1319 /* This indicates what will be resumed. Either a single thread,
1320 a whole process, or all threads of all processes. */
1321 resume_ptid
= user_visible_resume_ptid (0);
1323 ALL_NON_EXITED_THREADS (tp
)
1325 if (ptid_equal (tp
->ptid
, inferior_ptid
))
1327 if (!ptid_match (tp
->ptid
, resume_ptid
))
1330 if (tp
->suspend
.stop_signal
!= GDB_SIGNAL_0
1331 && signal_pass_state (tp
->suspend
.stop_signal
))
1334 printf_unfiltered (_("Note:\n"));
1335 printf_unfiltered (_(" Thread %s previously stopped with signal %s, %s.\n"),
1336 print_thread_id (tp
),
1337 gdb_signal_to_name (tp
->suspend
.stop_signal
),
1338 gdb_signal_to_string (tp
->suspend
.stop_signal
));
1344 && !query (_("Continuing thread %s (the current thread) with specified signal will\n"
1345 "still deliver the signals noted above to their respective threads.\n"
1346 "Continue anyway? "),
1347 print_thread_id (inferior_thread ())))
1348 error (_("Not confirmed."));
1353 if (oursig
== GDB_SIGNAL_0
)
1354 printf_filtered (_("Continuing with no signal.\n"));
1356 printf_filtered (_("Continuing with signal %s.\n"),
1357 gdb_signal_to_name (oursig
));
1360 clear_proceed_status (0);
1361 proceed ((CORE_ADDR
) -1, oursig
);
1364 /* Queue a signal to be delivered to the current thread. */
1367 queue_signal_command (char *signum_exp
, int from_tty
)
1369 enum gdb_signal oursig
;
1370 struct thread_info
*tp
;
1373 ensure_not_tfind_mode ();
1374 ensure_valid_thread ();
1375 ensure_not_running ();
1377 if (signum_exp
== NULL
)
1378 error_no_arg (_("signal number"));
1380 /* It would be even slicker to make signal names be valid expressions,
1381 (the type could be "enum $signal" or some such), then the user could
1382 assign them to convenience variables. */
1383 oursig
= gdb_signal_from_name (signum_exp
);
1385 if (oursig
== GDB_SIGNAL_UNKNOWN
)
1387 /* No, try numeric. */
1388 int num
= parse_and_eval_long (signum_exp
);
1391 oursig
= GDB_SIGNAL_0
;
1393 oursig
= gdb_signal_from_command (num
);
1396 if (oursig
!= GDB_SIGNAL_0
1397 && !signal_pass_state (oursig
))
1398 error (_("Signal handling set to not pass this signal to the program."));
1400 tp
= inferior_thread ();
1401 tp
->suspend
.stop_signal
= oursig
;
1404 /* Data for the FSM that manages the until (with no argument)
1407 struct until_next_fsm
1409 /* The base class. */
1410 struct thread_fsm thread_fsm
;
1412 /* The thread that as current when the command was executed. */
1416 static int until_next_fsm_should_stop (struct thread_fsm
*self
,
1417 struct thread_info
*thread
);
1418 static void until_next_fsm_clean_up (struct thread_fsm
*self
,
1419 struct thread_info
*thread
);
1420 static enum async_reply_reason
1421 until_next_fsm_async_reply_reason (struct thread_fsm
*self
);
1423 /* until_next_fsm's vtable. */
1425 static struct thread_fsm_ops until_next_fsm_ops
=
1428 until_next_fsm_clean_up
,
1429 until_next_fsm_should_stop
,
1430 NULL
, /* return_value */
1431 until_next_fsm_async_reply_reason
,
1434 /* Allocate a new until_next_fsm. */
1436 static struct until_next_fsm
*
1437 new_until_next_fsm (struct interp
*cmd_interp
, int thread
)
1439 struct until_next_fsm
*sm
;
1441 sm
= XCNEW (struct until_next_fsm
);
1442 thread_fsm_ctor (&sm
->thread_fsm
, &until_next_fsm_ops
, cmd_interp
);
1444 sm
->thread
= thread
;
1449 /* Implementation of the 'should_stop' FSM method for the until (with
1453 until_next_fsm_should_stop (struct thread_fsm
*self
,
1454 struct thread_info
*tp
)
1456 if (tp
->control
.stop_step
)
1457 thread_fsm_set_finished (self
);
1462 /* Implementation of the 'clean_up' FSM method for the until (with no
1466 until_next_fsm_clean_up (struct thread_fsm
*self
, struct thread_info
*thread
)
1468 struct until_next_fsm
*sm
= (struct until_next_fsm
*) self
;
1470 delete_longjmp_breakpoint (thread
->global_num
);
1473 /* Implementation of the 'async_reply_reason' FSM method for the until
1474 (with no arg) command. */
1476 static enum async_reply_reason
1477 until_next_fsm_async_reply_reason (struct thread_fsm
*self
)
1479 return EXEC_ASYNC_END_STEPPING_RANGE
;
1482 /* Proceed until we reach a different source line with pc greater than
1483 our current one or exit the function. We skip calls in both cases.
1485 Note that eventually this command should probably be changed so
1486 that only source lines are printed out when we hit the breakpoint
1487 we set. This may involve changes to wait_for_inferior and the
1488 proceed status code. */
1491 until_next_command (int from_tty
)
1493 struct frame_info
*frame
;
1495 struct symbol
*func
;
1496 struct symtab_and_line sal
;
1497 struct thread_info
*tp
= inferior_thread ();
1498 int thread
= tp
->global_num
;
1499 struct cleanup
*old_chain
;
1500 struct until_next_fsm
*sm
;
1502 clear_proceed_status (0);
1505 frame
= get_current_frame ();
1507 /* Step until either exited from this function or greater
1508 than the current line (if in symbolic section) or pc (if
1511 pc
= get_frame_pc (frame
);
1512 func
= find_pc_function (pc
);
1516 struct bound_minimal_symbol msymbol
= lookup_minimal_symbol_by_pc (pc
);
1518 if (msymbol
.minsym
== NULL
)
1519 error (_("Execution is not within a known function."));
1521 tp
->control
.step_range_start
= BMSYMBOL_VALUE_ADDRESS (msymbol
);
1522 /* The upper-bound of step_range is exclusive. In order to make PC
1523 within the range, set the step_range_end with PC + 1. */
1524 tp
->control
.step_range_end
= pc
+ 1;
1528 sal
= find_pc_line (pc
, 0);
1530 tp
->control
.step_range_start
= BLOCK_START (SYMBOL_BLOCK_VALUE (func
));
1531 tp
->control
.step_range_end
= sal
.end
;
1533 tp
->control
.may_range_step
= 1;
1535 tp
->control
.step_over_calls
= STEP_OVER_ALL
;
1537 set_longjmp_breakpoint (tp
, get_frame_id (frame
));
1538 old_chain
= make_cleanup (delete_longjmp_breakpoint_cleanup
, &thread
);
1540 sm
= new_until_next_fsm (command_interp (), tp
->global_num
);
1541 tp
->thread_fsm
= &sm
->thread_fsm
;
1542 discard_cleanups (old_chain
);
1544 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
1548 until_command (char *arg
, int from_tty
)
1551 struct cleanup
*args_chain
;
1554 ensure_not_tfind_mode ();
1555 ensure_valid_thread ();
1556 ensure_not_running ();
1558 /* Find out whether we must run in the background. */
1559 arg
= strip_bg_char (arg
, &async_exec
);
1560 args_chain
= make_cleanup (xfree
, arg
);
1562 prepare_execution_command (¤t_target
, async_exec
);
1565 until_break_command (arg
, from_tty
, 0);
1567 until_next_command (from_tty
);
1569 /* Done with ARGS. */
1570 do_cleanups (args_chain
);
1574 advance_command (char *arg
, int from_tty
)
1577 struct cleanup
*args_chain
;
1580 ensure_not_tfind_mode ();
1581 ensure_valid_thread ();
1582 ensure_not_running ();
1585 error_no_arg (_("a location"));
1587 /* Find out whether we must run in the background. */
1588 arg
= strip_bg_char (arg
, &async_exec
);
1589 args_chain
= make_cleanup (xfree
, arg
);
1591 prepare_execution_command (¤t_target
, async_exec
);
1593 until_break_command (arg
, from_tty
, 1);
1595 /* Done with ARGS. */
1596 do_cleanups (args_chain
);
1599 /* Return the value of the result of a function at the end of a 'finish'
1600 command/BP. DTOR_DATA (if not NULL) can represent inferior registers
1601 right after an inferior call has finished. */
1604 get_return_value (struct value
*function
, struct type
*value_type
)
1606 struct regcache
*stop_regs
;
1607 struct gdbarch
*gdbarch
;
1608 struct value
*value
;
1609 struct cleanup
*cleanup
;
1611 stop_regs
= regcache_dup (get_current_regcache ());
1612 cleanup
= make_cleanup_regcache_xfree (stop_regs
);
1614 gdbarch
= get_regcache_arch (stop_regs
);
1616 value_type
= check_typedef (value_type
);
1617 gdb_assert (TYPE_CODE (value_type
) != TYPE_CODE_VOID
);
1619 /* FIXME: 2003-09-27: When returning from a nested inferior function
1620 call, it's possible (with no help from the architecture vector)
1621 to locate and return/print a "struct return" value. This is just
1622 a more complicated case of what is already being done in the
1623 inferior function call code. In fact, when inferior function
1624 calls are made async, this will likely be made the norm. */
1626 switch (gdbarch_return_value (gdbarch
, function
, value_type
,
1629 case RETURN_VALUE_REGISTER_CONVENTION
:
1630 case RETURN_VALUE_ABI_RETURNS_ADDRESS
:
1631 case RETURN_VALUE_ABI_PRESERVES_ADDRESS
:
1632 value
= allocate_value (value_type
);
1633 gdbarch_return_value (gdbarch
, function
, value_type
, stop_regs
,
1634 value_contents_raw (value
), NULL
);
1636 case RETURN_VALUE_STRUCT_CONVENTION
:
1640 internal_error (__FILE__
, __LINE__
, _("bad switch"));
1643 do_cleanups (cleanup
);
1648 /* The captured function return value/type and its position in the
1651 struct return_value_info
1653 /* The captured return value. May be NULL if we weren't able to
1654 retrieve it. See get_return_value. */
1655 struct value
*value
;
1657 /* The return type. In some cases, we'll not be able extract the
1658 return value, but we always know the type. */
1661 /* If we captured a value, this is the value history index. */
1662 int value_history_index
;
1665 /* Helper for print_return_value. */
1668 print_return_value_1 (struct ui_out
*uiout
, struct return_value_info
*rv
)
1670 if (rv
->value
!= NULL
)
1672 struct value_print_options opts
;
1673 struct ui_file
*stb
;
1674 struct cleanup
*old_chain
;
1677 stb
= mem_fileopen ();
1678 old_chain
= make_cleanup_ui_file_delete (stb
);
1679 uiout
->text ("Value returned is ");
1680 uiout
->field_fmt ("gdb-result-var", "$%d",
1681 rv
->value_history_index
);
1682 uiout
->text (" = ");
1683 get_no_prettyformat_print_options (&opts
);
1684 value_print (rv
->value
, stb
, &opts
);
1685 uiout
->field_stream ("return-value", stb
);
1687 do_cleanups (old_chain
);
1691 std::string type_name
= type_to_string (rv
->type
);
1692 uiout
->text ("Value returned has type: ");
1693 uiout
->field_string ("return-type", type_name
.c_str ());
1695 uiout
->text (" Cannot determine contents\n");
1699 /* Print the result of a function at the end of a 'finish' command.
1700 RV points at an object representing the captured return value/type
1701 and its position in the value history. */
1704 print_return_value (struct ui_out
*uiout
, struct return_value_info
*rv
)
1706 if (rv
->type
== NULL
|| TYPE_CODE (rv
->type
) == TYPE_CODE_VOID
)
1711 /* print_return_value_1 can throw an exception in some
1712 circumstances. We need to catch this so that we still
1713 delete the breakpoint. */
1714 print_return_value_1 (uiout
, rv
);
1716 CATCH (ex
, RETURN_MASK_ALL
)
1718 exception_print (gdb_stdout
, ex
);
1723 /* Data for the FSM that manages the finish command. */
1725 struct finish_command_fsm
1727 /* The base class. */
1728 struct thread_fsm thread_fsm
;
1730 /* The momentary breakpoint set at the function's return address in
1732 struct breakpoint
*breakpoint
;
1734 /* The function that we're stepping out of. */
1735 struct symbol
*function
;
1737 /* If the FSM finishes successfully, this stores the function's
1739 struct return_value_info return_value
;
1742 static int finish_command_fsm_should_stop (struct thread_fsm
*self
,
1743 struct thread_info
*thread
);
1744 static void finish_command_fsm_clean_up (struct thread_fsm
*self
,
1745 struct thread_info
*thread
);
1746 static struct return_value_info
*
1747 finish_command_fsm_return_value (struct thread_fsm
*self
);
1748 static enum async_reply_reason
1749 finish_command_fsm_async_reply_reason (struct thread_fsm
*self
);
1751 /* finish_command_fsm's vtable. */
1753 static struct thread_fsm_ops finish_command_fsm_ops
=
1756 finish_command_fsm_clean_up
,
1757 finish_command_fsm_should_stop
,
1758 finish_command_fsm_return_value
,
1759 finish_command_fsm_async_reply_reason
,
1760 NULL
, /* should_notify_stop */
1763 /* Allocate a new finish_command_fsm. */
1765 static struct finish_command_fsm
*
1766 new_finish_command_fsm (struct interp
*cmd_interp
)
1768 struct finish_command_fsm
*sm
;
1770 sm
= XCNEW (struct finish_command_fsm
);
1771 thread_fsm_ctor (&sm
->thread_fsm
, &finish_command_fsm_ops
, cmd_interp
);
1776 /* Implementation of the 'should_stop' FSM method for the finish
1777 commands. Detects whether the thread stepped out of the function
1778 successfully, and if so, captures the function's return value and
1779 marks the FSM finished. */
1782 finish_command_fsm_should_stop (struct thread_fsm
*self
,
1783 struct thread_info
*tp
)
1785 struct finish_command_fsm
*f
= (struct finish_command_fsm
*) self
;
1786 struct return_value_info
*rv
= &f
->return_value
;
1788 if (f
->function
!= NULL
1789 && bpstat_find_breakpoint (tp
->control
.stop_bpstat
,
1790 f
->breakpoint
) != NULL
)
1793 thread_fsm_set_finished (self
);
1795 rv
->type
= TYPE_TARGET_TYPE (SYMBOL_TYPE (f
->function
));
1796 if (rv
->type
== NULL
)
1797 internal_error (__FILE__
, __LINE__
,
1798 _("finish_command: function has no target type"));
1800 if (TYPE_CODE (rv
->type
) != TYPE_CODE_VOID
)
1804 func
= read_var_value (f
->function
, NULL
, get_current_frame ());
1805 rv
->value
= get_return_value (func
, rv
->type
);
1806 if (rv
->value
!= NULL
)
1807 rv
->value_history_index
= record_latest_value (rv
->value
);
1810 else if (tp
->control
.stop_step
)
1812 /* Finishing from an inline frame, or reverse finishing. In
1813 either case, there's no way to retrieve the return value. */
1814 thread_fsm_set_finished (self
);
1820 /* Implementation of the 'clean_up' FSM method for the finish
1824 finish_command_fsm_clean_up (struct thread_fsm
*self
,
1825 struct thread_info
*thread
)
1827 struct finish_command_fsm
*f
= (struct finish_command_fsm
*) self
;
1829 if (f
->breakpoint
!= NULL
)
1831 delete_breakpoint (f
->breakpoint
);
1832 f
->breakpoint
= NULL
;
1834 delete_longjmp_breakpoint (thread
->global_num
);
1837 /* Implementation of the 'return_value' FSM method for the finish
1840 static struct return_value_info
*
1841 finish_command_fsm_return_value (struct thread_fsm
*self
)
1843 struct finish_command_fsm
*f
= (struct finish_command_fsm
*) self
;
1845 return &f
->return_value
;
1848 /* Implementation of the 'async_reply_reason' FSM method for the
1851 static enum async_reply_reason
1852 finish_command_fsm_async_reply_reason (struct thread_fsm
*self
)
1854 if (execution_direction
== EXEC_REVERSE
)
1855 return EXEC_ASYNC_END_STEPPING_RANGE
;
1857 return EXEC_ASYNC_FUNCTION_FINISHED
;
1860 /* finish_backward -- helper function for finish_command. */
1863 finish_backward (struct finish_command_fsm
*sm
)
1865 struct symtab_and_line sal
;
1866 struct thread_info
*tp
= inferior_thread ();
1868 CORE_ADDR func_addr
;
1870 pc
= get_frame_pc (get_current_frame ());
1872 if (find_pc_partial_function (pc
, NULL
, &func_addr
, NULL
) == 0)
1873 error (_("Cannot find bounds of current function"));
1875 sal
= find_pc_line (func_addr
, 0);
1877 tp
->control
.proceed_to_finish
= 1;
1878 /* Special case: if we're sitting at the function entry point,
1879 then all we need to do is take a reverse singlestep. We
1880 don't need to set a breakpoint, and indeed it would do us
1883 Note that this can only happen at frame #0, since there's
1884 no way that a function up the stack can have a return address
1885 that's equal to its entry point. */
1889 struct frame_info
*frame
= get_selected_frame (NULL
);
1890 struct gdbarch
*gdbarch
= get_frame_arch (frame
);
1891 struct symtab_and_line sr_sal
;
1893 /* Set a step-resume at the function's entry point. Once that's
1894 hit, we'll do one more step backwards. */
1897 sr_sal
.pspace
= get_frame_program_space (frame
);
1898 insert_step_resume_breakpoint_at_sal (gdbarch
,
1899 sr_sal
, null_frame_id
);
1901 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
1905 /* We're almost there -- we just need to back up by one more
1907 tp
->control
.step_range_start
= tp
->control
.step_range_end
= 1;
1908 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
1912 /* finish_forward -- helper function for finish_command. FRAME is the
1913 frame that called the function we're about to step out of. */
1916 finish_forward (struct finish_command_fsm
*sm
, struct frame_info
*frame
)
1918 struct frame_id frame_id
= get_frame_id (frame
);
1919 struct gdbarch
*gdbarch
= get_frame_arch (frame
);
1920 struct symtab_and_line sal
;
1921 struct thread_info
*tp
= inferior_thread ();
1923 sal
= find_pc_line (get_frame_pc (frame
), 0);
1924 sal
.pc
= get_frame_pc (frame
);
1926 sm
->breakpoint
= set_momentary_breakpoint (gdbarch
, sal
,
1927 get_stack_frame_id (frame
),
1930 /* set_momentary_breakpoint invalidates FRAME. */
1933 set_longjmp_breakpoint (tp
, frame_id
);
1935 /* We want to print return value, please... */
1936 tp
->control
.proceed_to_finish
= 1;
1938 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
1941 /* Skip frames for "finish". */
1943 static struct frame_info
*
1944 skip_finish_frames (struct frame_info
*frame
)
1946 struct frame_info
*start
;
1952 frame
= skip_tailcall_frames (frame
);
1956 frame
= skip_unwritable_frames (frame
);
1960 while (start
!= frame
);
1965 /* "finish": Set a temporary breakpoint at the place the selected
1966 frame will return to, then continue. */
1969 finish_command (char *arg
, int from_tty
)
1971 struct frame_info
*frame
;
1973 struct cleanup
*args_chain
;
1974 struct finish_command_fsm
*sm
;
1975 struct thread_info
*tp
;
1978 ensure_not_tfind_mode ();
1979 ensure_valid_thread ();
1980 ensure_not_running ();
1982 /* Find out whether we must run in the background. */
1983 arg
= strip_bg_char (arg
, &async_exec
);
1984 args_chain
= make_cleanup (xfree
, arg
);
1986 prepare_execution_command (¤t_target
, async_exec
);
1989 error (_("The \"finish\" command does not take any arguments."));
1991 /* Done with ARGS. */
1992 do_cleanups (args_chain
);
1994 frame
= get_prev_frame (get_selected_frame (_("No selected frame.")));
1996 error (_("\"finish\" not meaningful in the outermost frame."));
1998 clear_proceed_status (0);
2000 tp
= inferior_thread ();
2002 sm
= new_finish_command_fsm (command_interp ());
2004 tp
->thread_fsm
= &sm
->thread_fsm
;
2006 /* Finishing from an inline frame is completely different. We don't
2007 try to show the "return value" - no way to locate it. */
2008 if (get_frame_type (get_selected_frame (_("No selected frame.")))
2011 /* Claim we are stepping in the calling frame. An empty step
2012 range means that we will stop once we aren't in a function
2013 called by that frame. We don't use the magic "1" value for
2014 step_range_end, because then infrun will think this is nexti,
2015 and not step over the rest of this inlined function call. */
2016 struct symtab_and_line empty_sal
;
2018 init_sal (&empty_sal
);
2019 set_step_info (frame
, empty_sal
);
2020 tp
->control
.step_range_start
= get_frame_pc (frame
);
2021 tp
->control
.step_range_end
= tp
->control
.step_range_start
;
2022 tp
->control
.step_over_calls
= STEP_OVER_ALL
;
2024 /* Print info on the selected frame, including level number but not
2028 printf_filtered (_("Run till exit from "));
2029 print_stack_frame (get_selected_frame (NULL
), 1, LOCATION
, 0);
2032 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
2036 /* Find the function we will return from. */
2038 sm
->function
= find_pc_function (get_frame_pc (get_selected_frame (NULL
)));
2040 /* Print info on the selected frame, including level number but not
2044 if (execution_direction
== EXEC_REVERSE
)
2045 printf_filtered (_("Run back to call of "));
2048 if (sm
->function
!= NULL
&& TYPE_NO_RETURN (sm
->function
->type
)
2049 && !query (_("warning: Function %s does not return normally.\n"
2050 "Try to finish anyway? "),
2051 SYMBOL_PRINT_NAME (sm
->function
)))
2052 error (_("Not confirmed."));
2053 printf_filtered (_("Run till exit from "));
2056 print_stack_frame (get_selected_frame (NULL
), 1, LOCATION
, 0);
2059 if (execution_direction
== EXEC_REVERSE
)
2060 finish_backward (sm
);
2063 frame
= skip_finish_frames (frame
);
2066 error (_("Cannot find the caller frame."));
2068 finish_forward (sm
, frame
);
2074 program_info (char *args
, int from_tty
)
2078 struct thread_info
*tp
;
2081 if (!target_has_execution
)
2083 printf_filtered (_("The program being debugged is not being run.\n"));
2088 ptid
= inferior_ptid
;
2091 struct target_waitstatus ws
;
2093 get_last_target_status (&ptid
, &ws
);
2096 if (ptid_equal (ptid
, null_ptid
) || is_exited (ptid
))
2097 error (_("Invalid selected thread."));
2098 else if (is_running (ptid
))
2099 error (_("Selected thread is running."));
2101 tp
= find_thread_ptid (ptid
);
2102 bs
= tp
->control
.stop_bpstat
;
2103 stat
= bpstat_num (&bs
, &num
);
2105 target_files_info ();
2106 printf_filtered (_("Program stopped at %s.\n"),
2107 paddress (target_gdbarch (), stop_pc
));
2108 if (tp
->control
.stop_step
)
2109 printf_filtered (_("It stopped after being stepped.\n"));
2112 /* There may be several breakpoints in the same place, so this
2113 isn't as strange as it seems. */
2118 printf_filtered (_("It stopped at a breakpoint "
2119 "that has since been deleted.\n"));
2122 printf_filtered (_("It stopped at breakpoint %d.\n"), num
);
2123 stat
= bpstat_num (&bs
, &num
);
2126 else if (tp
->suspend
.stop_signal
!= GDB_SIGNAL_0
)
2128 printf_filtered (_("It stopped with signal %s, %s.\n"),
2129 gdb_signal_to_name (tp
->suspend
.stop_signal
),
2130 gdb_signal_to_string (tp
->suspend
.stop_signal
));
2135 printf_filtered (_("Type \"info stack\" or \"info "
2136 "registers\" for more information.\n"));
2141 environment_info (char *var
, int from_tty
)
2145 char *val
= get_in_environ (current_inferior ()->environment
, var
);
2149 puts_filtered (var
);
2150 puts_filtered (" = ");
2151 puts_filtered (val
);
2152 puts_filtered ("\n");
2156 puts_filtered ("Environment variable \"");
2157 puts_filtered (var
);
2158 puts_filtered ("\" not defined.\n");
2163 char **vector
= environ_vector (current_inferior ()->environment
);
2167 puts_filtered (*vector
++);
2168 puts_filtered ("\n");
2174 set_environment_command (char *arg
, int from_tty
)
2176 char *p
, *val
, *var
;
2180 error_no_arg (_("environment variable and value"));
2182 /* Find seperation between variable name and value. */
2183 p
= (char *) strchr (arg
, '=');
2184 val
= (char *) strchr (arg
, ' ');
2186 if (p
!= 0 && val
!= 0)
2188 /* We have both a space and an equals. If the space is before the
2189 equals, walk forward over the spaces til we see a nonspace
2190 (possibly the equals). */
2195 /* Now if the = is after the char following the spaces,
2196 take the char following the spaces. */
2200 else if (val
!= 0 && p
== 0)
2204 error_no_arg (_("environment variable to set"));
2206 if (p
== 0 || p
[1] == 0)
2210 p
= arg
+ strlen (arg
); /* So that savestring below will work. */
2214 /* Not setting variable value to null. */
2216 while (*val
== ' ' || *val
== '\t')
2220 while (p
!= arg
&& (p
[-1] == ' ' || p
[-1] == '\t'))
2223 var
= savestring (arg
, p
- arg
);
2226 printf_filtered (_("Setting environment variable "
2227 "\"%s\" to null value.\n"),
2229 set_in_environ (current_inferior ()->environment
, var
, "");
2232 set_in_environ (current_inferior ()->environment
, var
, val
);
2237 unset_environment_command (char *var
, int from_tty
)
2241 /* If there is no argument, delete all environment variables.
2242 Ask for confirmation if reading from the terminal. */
2243 if (!from_tty
|| query (_("Delete all environment variables? ")))
2245 free_environ (current_inferior ()->environment
);
2246 current_inferior ()->environment
= make_environ ();
2250 unset_in_environ (current_inferior ()->environment
, var
);
2253 /* Handle the execution path (PATH variable). */
2255 static const char path_var_name
[] = "PATH";
2258 path_info (char *args
, int from_tty
)
2260 puts_filtered ("Executable and object file path: ");
2261 puts_filtered (get_in_environ (current_inferior ()->environment
,
2263 puts_filtered ("\n");
2266 /* Add zero or more directories to the front of the execution path. */
2269 path_command (char *dirname
, int from_tty
)
2275 env
= get_in_environ (current_inferior ()->environment
, path_var_name
);
2276 /* Can be null if path is not set. */
2279 exec_path
= xstrdup (env
);
2280 mod_path (dirname
, &exec_path
);
2281 set_in_environ (current_inferior ()->environment
, path_var_name
, exec_path
);
2284 path_info ((char *) NULL
, from_tty
);
2288 /* Print out the register NAME with value VAL, to FILE, in the default
2292 default_print_one_register_info (struct ui_file
*file
,
2296 struct type
*regtype
= value_type (val
);
2297 int print_raw_format
;
2299 fputs_filtered (name
, file
);
2300 print_spaces_filtered (15 - strlen (name
), file
);
2302 print_raw_format
= (value_entirely_available (val
)
2303 && !value_optimized_out (val
));
2305 /* If virtual format is floating, print it that way, and in raw
2307 if (TYPE_CODE (regtype
) == TYPE_CODE_FLT
2308 || TYPE_CODE (regtype
) == TYPE_CODE_DECFLOAT
)
2310 struct value_print_options opts
;
2311 const gdb_byte
*valaddr
= value_contents_for_printing (val
);
2312 enum bfd_endian byte_order
= gdbarch_byte_order (get_type_arch (regtype
));
2314 get_user_print_options (&opts
);
2318 value_embedded_offset (val
), 0,
2319 file
, 0, val
, &opts
, current_language
);
2321 if (print_raw_format
)
2323 fprintf_filtered (file
, "\t(raw ");
2324 print_hex_chars (file
, valaddr
, TYPE_LENGTH (regtype
), byte_order
);
2325 fprintf_filtered (file
, ")");
2330 struct value_print_options opts
;
2332 /* Print the register in hex. */
2333 get_formatted_print_options (&opts
, 'x');
2336 value_embedded_offset (val
), 0,
2337 file
, 0, val
, &opts
, current_language
);
2338 /* If not a vector register, print it also according to its
2340 if (print_raw_format
&& TYPE_VECTOR (regtype
) == 0)
2342 get_user_print_options (&opts
);
2344 fprintf_filtered (file
, "\t");
2346 value_embedded_offset (val
), 0,
2347 file
, 0, val
, &opts
, current_language
);
2351 fprintf_filtered (file
, "\n");
2354 /* Print out the machine register regnum. If regnum is -1, print all
2355 registers (print_all == 1) or all non-float and non-vector
2356 registers (print_all == 0).
2358 For most machines, having all_registers_info() print the
2359 register(s) one per line is good enough. If a different format is
2360 required, (eg, for MIPS or Pyramid 90x, which both have lots of
2361 regs), or there is an existing convention for showing all the
2362 registers, define the architecture method PRINT_REGISTERS_INFO to
2363 provide that format. */
2366 default_print_registers_info (struct gdbarch
*gdbarch
,
2367 struct ui_file
*file
,
2368 struct frame_info
*frame
,
2369 int regnum
, int print_all
)
2372 const int numregs
= gdbarch_num_regs (gdbarch
)
2373 + gdbarch_num_pseudo_regs (gdbarch
);
2375 for (i
= 0; i
< numregs
; i
++)
2377 /* Decide between printing all regs, non-float / vector regs, or
2383 if (!gdbarch_register_reggroup_p (gdbarch
, i
, all_reggroup
))
2388 if (!gdbarch_register_reggroup_p (gdbarch
, i
, general_reggroup
))
2398 /* If the register name is empty, it is undefined for this
2399 processor, so don't display anything. */
2400 if (gdbarch_register_name (gdbarch
, i
) == NULL
2401 || *(gdbarch_register_name (gdbarch
, i
)) == '\0')
2404 default_print_one_register_info (file
,
2405 gdbarch_register_name (gdbarch
, i
),
2406 value_of_register (i
, frame
));
2411 registers_info (char *addr_exp
, int fpregs
)
2413 struct frame_info
*frame
;
2414 struct gdbarch
*gdbarch
;
2416 if (!target_has_registers
)
2417 error (_("The program has no registers now."));
2418 frame
= get_selected_frame (NULL
);
2419 gdbarch
= get_frame_arch (frame
);
2423 gdbarch_print_registers_info (gdbarch
, gdb_stdout
,
2428 while (*addr_exp
!= '\0')
2433 /* Skip leading white space. */
2434 addr_exp
= skip_spaces (addr_exp
);
2436 /* Discard any leading ``$''. Check that there is something
2437 resembling a register following it. */
2438 if (addr_exp
[0] == '$')
2440 if (isspace ((*addr_exp
)) || (*addr_exp
) == '\0')
2441 error (_("Missing register name"));
2443 /* Find the start/end of this register name/num/group. */
2445 while ((*addr_exp
) != '\0' && !isspace ((*addr_exp
)))
2449 /* Figure out what we've found and display it. */
2451 /* A register name? */
2453 int regnum
= user_reg_map_name_to_regnum (gdbarch
, start
, end
- start
);
2457 /* User registers lie completely outside of the range of
2458 normal registers. Catch them early so that the target
2460 if (regnum
>= gdbarch_num_regs (gdbarch
)
2461 + gdbarch_num_pseudo_regs (gdbarch
))
2463 struct value
*regval
= value_of_user_reg (regnum
, frame
);
2464 const char *regname
= user_reg_map_regnum_to_name (gdbarch
,
2467 /* Print in the same fashion
2468 gdbarch_print_registers_info's default
2469 implementation prints. */
2470 default_print_one_register_info (gdb_stdout
,
2475 gdbarch_print_registers_info (gdbarch
, gdb_stdout
,
2476 frame
, regnum
, fpregs
);
2481 /* A register group? */
2483 struct reggroup
*group
;
2485 for (group
= reggroup_next (gdbarch
, NULL
);
2487 group
= reggroup_next (gdbarch
, group
))
2489 /* Don't bother with a length check. Should the user
2490 enter a short register group name, go with the first
2491 group that matches. */
2492 if (strncmp (start
, reggroup_name (group
), end
- start
) == 0)
2500 regnum
< gdbarch_num_regs (gdbarch
)
2501 + gdbarch_num_pseudo_regs (gdbarch
);
2504 if (gdbarch_register_reggroup_p (gdbarch
, regnum
, group
))
2505 gdbarch_print_registers_info (gdbarch
,
2513 /* Nothing matched. */
2514 error (_("Invalid register `%.*s'"), (int) (end
- start
), start
);
2519 all_registers_info (char *addr_exp
, int from_tty
)
2521 registers_info (addr_exp
, 1);
2525 nofp_registers_info (char *addr_exp
, int from_tty
)
2527 registers_info (addr_exp
, 0);
2531 print_vector_info (struct ui_file
*file
,
2532 struct frame_info
*frame
, const char *args
)
2534 struct gdbarch
*gdbarch
= get_frame_arch (frame
);
2536 if (gdbarch_print_vector_info_p (gdbarch
))
2537 gdbarch_print_vector_info (gdbarch
, file
, frame
, args
);
2541 int printed_something
= 0;
2544 regnum
< gdbarch_num_regs (gdbarch
)
2545 + gdbarch_num_pseudo_regs (gdbarch
);
2548 if (gdbarch_register_reggroup_p (gdbarch
, regnum
, vector_reggroup
))
2550 printed_something
= 1;
2551 gdbarch_print_registers_info (gdbarch
, file
, frame
, regnum
, 1);
2554 if (!printed_something
)
2555 fprintf_filtered (file
, "No vector information\n");
2560 vector_info (char *args
, int from_tty
)
2562 if (!target_has_registers
)
2563 error (_("The program has no registers now."));
2565 print_vector_info (gdb_stdout
, get_selected_frame (NULL
), args
);
2568 /* Kill the inferior process. Make us have no inferior. */
2571 kill_command (char *arg
, int from_tty
)
2573 /* FIXME: This should not really be inferior_ptid (or target_has_execution).
2574 It should be a distinct flag that indicates that a target is active, cuz
2575 some targets don't have processes! */
2577 if (ptid_equal (inferior_ptid
, null_ptid
))
2578 error (_("The program is not being run."));
2579 if (!query (_("Kill the program being debugged? ")))
2580 error (_("Not confirmed."));
2583 /* If we still have other inferiors to debug, then don't mess with
2584 with their threads. */
2585 if (!have_inferiors ())
2587 init_thread_list (); /* Destroy thread info. */
2589 /* Killing off the inferior can leave us with a core file. If
2590 so, print the state we are left in. */
2591 if (target_has_stack
)
2593 printf_filtered (_("In %s,\n"), target_longname
);
2594 print_stack_frame (get_selected_frame (NULL
), 1, SRC_AND_LOC
, 1);
2597 bfd_cache_close_all ();
2600 /* Used in `attach&' command. ARG is a point to an integer
2601 representing a process id. Proceed threads of this process iff
2602 they stopped due to debugger request, and when they did, they
2603 reported a clean stop (GDB_SIGNAL_0). Do not proceed threads
2604 that have been explicitly been told to stop. */
2607 proceed_after_attach_callback (struct thread_info
*thread
,
2610 int pid
= * (int *) arg
;
2612 if (ptid_get_pid (thread
->ptid
) == pid
2613 && !is_exited (thread
->ptid
)
2614 && !is_executing (thread
->ptid
)
2615 && !thread
->stop_requested
2616 && thread
->suspend
.stop_signal
== GDB_SIGNAL_0
)
2618 switch_to_thread (thread
->ptid
);
2619 clear_proceed_status (0);
2620 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
2627 proceed_after_attach (int pid
)
2629 /* Don't error out if the current thread is running, because
2630 there may be other stopped threads. */
2631 struct cleanup
*old_chain
;
2633 /* Backup current thread and selected frame. */
2634 old_chain
= make_cleanup_restore_current_thread ();
2636 iterate_over_threads (proceed_after_attach_callback
, &pid
);
2638 /* Restore selected ptid. */
2639 do_cleanups (old_chain
);
2642 /* See inferior.h. */
2645 setup_inferior (int from_tty
)
2647 struct inferior
*inferior
;
2649 inferior
= current_inferior ();
2650 inferior
->needs_setup
= 0;
2652 /* If no exec file is yet known, try to determine it from the
2654 if (get_exec_file (0) == NULL
)
2655 exec_file_locate_attach (ptid_get_pid (inferior_ptid
), 1, from_tty
);
2658 reopen_exec_file ();
2662 /* Take any necessary post-attaching actions for this platform. */
2663 target_post_attach (ptid_get_pid (inferior_ptid
));
2665 post_create_inferior (¤t_target
, from_tty
);
2668 /* What to do after the first program stops after attaching. */
2669 enum attach_post_wait_mode
2671 /* Do nothing. Leaves threads as they are. */
2672 ATTACH_POST_WAIT_NOTHING
,
2674 /* Re-resume threads that are marked running. */
2675 ATTACH_POST_WAIT_RESUME
,
2677 /* Stop all threads. */
2678 ATTACH_POST_WAIT_STOP
,
2681 /* Called after we've attached to a process and we've seen it stop for
2682 the first time. If ASYNC_EXEC is true, re-resume threads that
2683 should be running. Else if ATTACH, */
2686 attach_post_wait (char *args
, int from_tty
, enum attach_post_wait_mode mode
)
2688 struct inferior
*inferior
;
2690 inferior
= current_inferior ();
2691 inferior
->control
.stop_soon
= NO_STOP_QUIETLY
;
2693 if (inferior
->needs_setup
)
2694 setup_inferior (from_tty
);
2696 if (mode
== ATTACH_POST_WAIT_RESUME
)
2698 /* The user requested an `attach&', so be sure to leave threads
2699 that didn't get a signal running. */
2701 /* Immediatelly resume all suspended threads of this inferior,
2702 and this inferior only. This should have no effect on
2703 already running threads. If a thread has been stopped with a
2704 signal, leave it be. */
2706 proceed_after_attach (inferior
->pid
);
2709 if (inferior_thread ()->suspend
.stop_signal
== GDB_SIGNAL_0
)
2711 clear_proceed_status (0);
2712 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
2716 else if (mode
== ATTACH_POST_WAIT_STOP
)
2718 /* The user requested a plain `attach', so be sure to leave
2719 the inferior stopped. */
2721 /* At least the current thread is already stopped. */
2723 /* In all-stop, by definition, all threads have to be already
2724 stopped at this point. In non-stop, however, although the
2725 selected thread is stopped, others may still be executing.
2726 Be sure to explicitly stop all threads of the process. This
2727 should have no effect on already stopped threads. */
2729 target_stop (pid_to_ptid (inferior
->pid
));
2730 else if (target_is_non_stop_p ())
2732 struct thread_info
*thread
;
2733 struct thread_info
*lowest
= inferior_thread ();
2734 int pid
= current_inferior ()->pid
;
2736 stop_all_threads ();
2738 /* It's not defined which thread will report the attach
2739 stop. For consistency, always select the thread with
2740 lowest GDB number, which should be the main thread, if it
2742 ALL_NON_EXITED_THREADS (thread
)
2744 if (ptid_get_pid (thread
->ptid
) == pid
)
2746 if (thread
->inf
->num
< lowest
->inf
->num
2747 || thread
->per_inf_num
< lowest
->per_inf_num
)
2752 switch_to_thread (lowest
->ptid
);
2755 /* Tell the user/frontend where we're stopped. */
2757 if (deprecated_attach_hook
)
2758 deprecated_attach_hook ();
2762 struct attach_command_continuation_args
2766 enum attach_post_wait_mode mode
;
2770 attach_command_continuation (void *args
, int err
)
2772 struct attach_command_continuation_args
*a
2773 = (struct attach_command_continuation_args
*) args
;
2778 attach_post_wait (a
->args
, a
->from_tty
, a
->mode
);
2782 attach_command_continuation_free_args (void *args
)
2784 struct attach_command_continuation_args
*a
2785 = (struct attach_command_continuation_args
*) args
;
2791 /* "attach" command entry point. Takes a program started up outside
2792 of gdb and ``attaches'' to it. This stops it cold in its tracks
2793 and allows us to start debugging it. */
2796 attach_command (char *args
, int from_tty
)
2799 struct cleanup
*args_chain
;
2800 struct target_ops
*attach_target
;
2801 struct inferior
*inferior
= current_inferior ();
2802 enum attach_post_wait_mode mode
;
2804 dont_repeat (); /* Not for the faint of heart */
2806 if (gdbarch_has_global_solist (target_gdbarch ()))
2807 /* Don't complain if all processes share the same symbol
2810 else if (target_has_execution
)
2812 if (query (_("A program is being debugged already. Kill it? ")))
2815 error (_("Not killed."));
2818 /* Clean up any leftovers from other runs. Some other things from
2819 this function should probably be moved into target_pre_inferior. */
2820 target_pre_inferior (from_tty
);
2822 args
= strip_bg_char (args
, &async_exec
);
2823 args_chain
= make_cleanup (xfree
, args
);
2825 attach_target
= find_attach_target ();
2827 prepare_execution_command (attach_target
, async_exec
);
2829 if (non_stop
&& !attach_target
->to_supports_non_stop (attach_target
))
2830 error (_("Cannot attach to this target in non-stop mode"));
2832 attach_target
->to_attach (attach_target
, args
, from_tty
);
2833 /* to_attach should push the target, so after this point we
2834 shouldn't refer to attach_target again. */
2835 attach_target
= NULL
;
2837 /* Set up the "saved terminal modes" of the inferior
2838 based on what modes we are starting it with. */
2839 target_terminal_init ();
2841 /* Install inferior's terminal modes. This may look like a no-op,
2842 as we've just saved them above, however, this does more than
2843 restore terminal settings:
2845 - installs a SIGINT handler that forwards SIGINT to the inferior.
2846 Otherwise a Ctrl-C pressed just while waiting for the initial
2847 stop would end up as a spurious Quit.
2849 - removes stdin from the event loop, which we need if attaching
2850 in the foreground, otherwise on targets that report an initial
2851 stop on attach (which are most) we'd process input/commands
2852 while we're in the event loop waiting for that stop. That is,
2853 before the attach continuation runs and the command is really
2855 target_terminal_inferior ();
2857 /* Set up execution context to know that we should return from
2858 wait_for_inferior as soon as the target reports a stop. */
2859 init_wait_for_inferior ();
2860 clear_proceed_status (0);
2862 inferior
->needs_setup
= 1;
2864 if (target_is_non_stop_p ())
2866 /* If we find that the current thread isn't stopped, explicitly
2867 do so now, because we're going to install breakpoints and
2871 /* The user requested an `attach&'; stop just one thread. */
2872 target_stop (inferior_ptid
);
2874 /* The user requested an `attach', so stop all threads of this
2876 target_stop (pid_to_ptid (ptid_get_pid (inferior_ptid
)));
2879 mode
= async_exec
? ATTACH_POST_WAIT_RESUME
: ATTACH_POST_WAIT_STOP
;
2881 /* Some system don't generate traps when attaching to inferior.
2882 E.g. Mach 3 or GNU hurd. */
2883 if (!target_attach_no_wait
)
2885 struct attach_command_continuation_args
*a
;
2887 /* Careful here. See comments in inferior.h. Basically some
2888 OSes don't ignore SIGSTOPs on continue requests anymore. We
2889 need a way for handle_inferior_event to reset the stop_signal
2890 variable after an attach, and this is what
2891 STOP_QUIETLY_NO_SIGSTOP is for. */
2892 inferior
->control
.stop_soon
= STOP_QUIETLY_NO_SIGSTOP
;
2894 /* Wait for stop. */
2895 a
= XNEW (struct attach_command_continuation_args
);
2896 a
->args
= xstrdup (args
);
2897 a
->from_tty
= from_tty
;
2899 add_inferior_continuation (attach_command_continuation
, a
,
2900 attach_command_continuation_free_args
);
2901 /* Done with ARGS. */
2902 do_cleanups (args_chain
);
2904 if (!target_is_async_p ())
2905 mark_infrun_async_event_handler ();
2909 /* Done with ARGS. */
2910 do_cleanups (args_chain
);
2912 attach_post_wait (args
, from_tty
, mode
);
2915 /* We had just found out that the target was already attached to an
2916 inferior. PTID points at a thread of this new inferior, that is
2917 the most likely to be stopped right now, but not necessarily so.
2918 The new inferior is assumed to be already added to the inferior
2919 list at this point. If LEAVE_RUNNING, then leave the threads of
2920 this inferior running, except those we've explicitly seen reported
2924 notice_new_inferior (ptid_t ptid
, int leave_running
, int from_tty
)
2926 struct cleanup
* old_chain
;
2927 enum attach_post_wait_mode mode
;
2929 old_chain
= make_cleanup (null_cleanup
, NULL
);
2931 mode
= leave_running
? ATTACH_POST_WAIT_RESUME
: ATTACH_POST_WAIT_NOTHING
;
2933 if (!ptid_equal (inferior_ptid
, null_ptid
))
2934 make_cleanup_restore_current_thread ();
2936 /* Avoid reading registers -- we haven't fetched the target
2938 switch_to_thread_no_regs (find_thread_ptid (ptid
));
2940 /* When we "notice" a new inferior we need to do all the things we
2941 would normally do if we had just attached to it. */
2943 if (is_executing (inferior_ptid
))
2945 struct attach_command_continuation_args
*a
;
2946 struct inferior
*inferior
= current_inferior ();
2948 /* We're going to install breakpoints, and poke at memory,
2949 ensure that the inferior is stopped for a moment while we do
2951 target_stop (inferior_ptid
);
2953 inferior
->control
.stop_soon
= STOP_QUIETLY_REMOTE
;
2955 /* Wait for stop before proceeding. */
2956 a
= XNEW (struct attach_command_continuation_args
);
2957 a
->args
= xstrdup ("");
2958 a
->from_tty
= from_tty
;
2960 add_inferior_continuation (attach_command_continuation
, a
,
2961 attach_command_continuation_free_args
);
2963 do_cleanups (old_chain
);
2967 attach_post_wait ("" /* args */, from_tty
, mode
);
2969 do_cleanups (old_chain
);
2974 * takes a program previously attached to and detaches it.
2975 * The program resumes execution and will no longer stop
2976 * on signals, etc. We better not have left any breakpoints
2977 * in the program or it'll die when it hits one. For this
2978 * to work, it may be necessary for the process to have been
2979 * previously attached. It *might* work if the program was
2980 * started via the normal ptrace (PTRACE_TRACEME).
2984 detach_command (char *args
, int from_tty
)
2986 dont_repeat (); /* Not for the faint of heart. */
2988 if (ptid_equal (inferior_ptid
, null_ptid
))
2989 error (_("The program is not being run."));
2991 query_if_trace_running (from_tty
);
2993 disconnect_tracing ();
2995 target_detach (args
, from_tty
);
2997 /* The current inferior process was just detached successfully. Get
2998 rid of breakpoints that no longer make sense. Note we don't do
2999 this within target_detach because that is also used when
3000 following child forks, and in that case we will want to transfer
3001 breakpoints to the child, not delete them. */
3002 breakpoint_init_inferior (inf_exited
);
3004 /* If the solist is global across inferiors, don't clear it when we
3005 detach from a single inferior. */
3006 if (!gdbarch_has_global_solist (target_gdbarch ()))
3007 no_shared_libraries (NULL
, from_tty
);
3009 /* If we still have inferiors to debug, then don't mess with their
3011 if (!have_inferiors ())
3012 init_thread_list ();
3014 if (deprecated_detach_hook
)
3015 deprecated_detach_hook ();
3018 /* Disconnect from the current target without resuming it (leaving it
3019 waiting for a debugger).
3021 We'd better not have left any breakpoints in the program or the
3022 next debugger will get confused. Currently only supported for some
3023 remote targets, since the normal attach mechanisms don't work on
3024 stopped processes on some native platforms (e.g. GNU/Linux). */
3027 disconnect_command (char *args
, int from_tty
)
3029 dont_repeat (); /* Not for the faint of heart. */
3030 query_if_trace_running (from_tty
);
3031 disconnect_tracing ();
3032 target_disconnect (args
, from_tty
);
3033 no_shared_libraries (NULL
, from_tty
);
3034 init_thread_list ();
3035 if (deprecated_detach_hook
)
3036 deprecated_detach_hook ();
3040 interrupt_target_1 (int all_threads
)
3045 ptid
= minus_one_ptid
;
3047 ptid
= inferior_ptid
;
3052 target_interrupt (ptid
);
3054 /* Tag the thread as having been explicitly requested to stop, so
3055 other parts of gdb know not to resume this thread automatically,
3056 if it was stopped due to an internal event. Limit this to
3057 non-stop mode, as when debugging a multi-threaded application in
3058 all-stop mode, we will only get one stop event --- it's undefined
3059 which thread will report the event. */
3061 set_stop_requested (ptid
, 1);
3065 Stop the execution of the target while running in async mode, in
3066 the background. In all-stop, stop the whole process. In non-stop
3067 mode, stop the current thread only by default, or stop all threads
3068 if the `-a' switch is used. */
3071 interrupt_command (char *args
, int from_tty
)
3073 if (target_can_async_p ())
3075 int all_threads
= 0;
3077 dont_repeat (); /* Not for the faint of heart. */
3080 && startswith (args
, "-a"))
3083 if (!non_stop
&& all_threads
)
3084 error (_("-a is meaningless in all-stop mode."));
3086 interrupt_target_1 (all_threads
);
3090 /* See inferior.h. */
3093 default_print_float_info (struct gdbarch
*gdbarch
, struct ui_file
*file
,
3094 struct frame_info
*frame
, const char *args
)
3097 int printed_something
= 0;
3100 regnum
< gdbarch_num_regs (gdbarch
)
3101 + gdbarch_num_pseudo_regs (gdbarch
);
3104 if (gdbarch_register_reggroup_p (gdbarch
, regnum
, float_reggroup
))
3106 printed_something
= 1;
3107 gdbarch_print_registers_info (gdbarch
, file
, frame
, regnum
, 1);
3110 if (!printed_something
)
3111 fprintf_filtered (file
, "No floating-point info "
3112 "available for this processor.\n");
3116 float_info (char *args
, int from_tty
)
3118 struct frame_info
*frame
;
3120 if (!target_has_registers
)
3121 error (_("The program has no registers now."));
3123 frame
= get_selected_frame (NULL
);
3124 gdbarch_print_float_info (get_frame_arch (frame
), gdb_stdout
, frame
, args
);
3128 unset_command (char *args
, int from_tty
)
3130 printf_filtered (_("\"unset\" must be followed by the "
3131 "name of an unset subcommand.\n"));
3132 help_list (unsetlist
, "unset ", all_commands
, gdb_stdout
);
3135 /* Implement `info proc' family of commands. */
3138 info_proc_cmd_1 (char *args
, enum info_proc_what what
, int from_tty
)
3140 struct gdbarch
*gdbarch
= get_current_arch ();
3142 if (!target_info_proc (args
, what
))
3144 if (gdbarch_info_proc_p (gdbarch
))
3145 gdbarch_info_proc (gdbarch
, args
, what
);
3147 error (_("Not supported on this target."));
3151 /* Implement `info proc' when given without any futher parameters. */
3154 info_proc_cmd (char *args
, int from_tty
)
3156 info_proc_cmd_1 (args
, IP_MINIMAL
, from_tty
);
3159 /* Implement `info proc mappings'. */
3162 info_proc_cmd_mappings (char *args
, int from_tty
)
3164 info_proc_cmd_1 (args
, IP_MAPPINGS
, from_tty
);
3167 /* Implement `info proc stat'. */
3170 info_proc_cmd_stat (char *args
, int from_tty
)
3172 info_proc_cmd_1 (args
, IP_STAT
, from_tty
);
3175 /* Implement `info proc status'. */
3178 info_proc_cmd_status (char *args
, int from_tty
)
3180 info_proc_cmd_1 (args
, IP_STATUS
, from_tty
);
3183 /* Implement `info proc cwd'. */
3186 info_proc_cmd_cwd (char *args
, int from_tty
)
3188 info_proc_cmd_1 (args
, IP_CWD
, from_tty
);
3191 /* Implement `info proc cmdline'. */
3194 info_proc_cmd_cmdline (char *args
, int from_tty
)
3196 info_proc_cmd_1 (args
, IP_CMDLINE
, from_tty
);
3199 /* Implement `info proc exe'. */
3202 info_proc_cmd_exe (char *args
, int from_tty
)
3204 info_proc_cmd_1 (args
, IP_EXE
, from_tty
);
3207 /* Implement `info proc all'. */
3210 info_proc_cmd_all (char *args
, int from_tty
)
3212 info_proc_cmd_1 (args
, IP_ALL
, from_tty
);
3216 _initialize_infcmd (void)
3218 static struct cmd_list_element
*info_proc_cmdlist
;
3219 struct cmd_list_element
*c
= NULL
;
3220 const char *cmd_name
;
3222 /* Add the filename of the terminal connected to inferior I/O. */
3223 add_setshow_optional_filename_cmd ("inferior-tty", class_run
,
3224 &inferior_io_terminal_scratch
, _("\
3225 Set terminal for future runs of program being debugged."), _("\
3226 Show terminal for future runs of program being debugged."), _("\
3227 Usage: set inferior-tty [TTY]\n\n\
3228 If TTY is omitted, the default behavior of using the same terminal as GDB\n\
3230 set_inferior_tty_command
,
3231 show_inferior_tty_command
,
3232 &setlist
, &showlist
);
3233 add_com_alias ("tty", "set inferior-tty", class_alias
, 0);
3236 add_setshow_string_noescape_cmd (cmd_name
, class_run
,
3237 &inferior_args_scratch
, _("\
3238 Set argument list to give program being debugged when it is started."), _("\
3239 Show argument list to give program being debugged when it is started."), _("\
3240 Follow this command with any number of args, to be passed to the program."),
3243 &setlist
, &showlist
);
3244 c
= lookup_cmd (&cmd_name
, setlist
, "", -1, 1);
3245 gdb_assert (c
!= NULL
);
3246 set_cmd_completer (c
, filename_completer
);
3248 c
= add_cmd ("environment", no_class
, environment_info
, _("\
3249 The environment to give the program, or one variable's value.\n\
3250 With an argument VAR, prints the value of environment variable VAR to\n\
3251 give the program being debugged. With no arguments, prints the entire\n\
3252 environment to be given to the program."), &showlist
);
3253 set_cmd_completer (c
, noop_completer
);
3255 add_prefix_cmd ("unset", no_class
, unset_command
,
3256 _("Complement to certain \"set\" commands."),
3257 &unsetlist
, "unset ", 0, &cmdlist
);
3259 c
= add_cmd ("environment", class_run
, unset_environment_command
, _("\
3260 Cancel environment variable VAR for the program.\n\
3261 This does not affect the program until the next \"run\" command."),
3263 set_cmd_completer (c
, noop_completer
);
3265 c
= add_cmd ("environment", class_run
, set_environment_command
, _("\
3266 Set environment variable value to give the program.\n\
3267 Arguments are VAR VALUE where VAR is variable name and VALUE is value.\n\
3268 VALUES of environment variables are uninterpreted strings.\n\
3269 This does not affect the program until the next \"run\" command."),
3271 set_cmd_completer (c
, noop_completer
);
3273 c
= add_com ("path", class_files
, path_command
, _("\
3274 Add directory DIR(s) to beginning of search path for 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 \
3280 set_cmd_completer (c
, filename_completer
);
3282 c
= add_cmd ("paths", no_class
, path_info
, _("\
3283 Current search path for finding object files.\n\
3284 $cwd in the path means the current working directory.\n\
3285 This path is equivalent to the $PATH shell variable. It is a list of\n\
3286 directories, separated by colons. These directories are searched to find\n\
3287 fully linked executable files and separately compiled object files as \
3290 set_cmd_completer (c
, noop_completer
);
3292 add_prefix_cmd ("kill", class_run
, kill_command
,
3293 _("Kill execution of program being debugged."),
3294 &killlist
, "kill ", 0, &cmdlist
);
3296 add_com ("attach", class_run
, attach_command
, _("\
3297 Attach to a process or file outside of GDB.\n\
3298 This command attaches to another target, of the same type as your last\n\
3299 \"target\" command (\"info files\" will show your target stack).\n\
3300 The command may take as argument a process id or a device file.\n\
3301 For a process id, you must have permission to send the process a signal,\n\
3302 and it must have the same effective uid as the debugger.\n\
3303 When using \"attach\" with a process id, the debugger finds the\n\
3304 program running in the process, looking first in the current working\n\
3305 directory, or (if not found there) using the source file search path\n\
3306 (see the \"directory\" command). You can also use the \"file\" command\n\
3307 to specify the program, and to load its symbol table."));
3309 add_prefix_cmd ("detach", class_run
, detach_command
, _("\
3310 Detach a process or file previously attached.\n\
3311 If a process, it is no longer traced, and it continues its execution. If\n\
3312 you were debugging a file, the file is closed and gdb no longer accesses it."),
3313 &detachlist
, "detach ", 0, &cmdlist
);
3315 add_com ("disconnect", class_run
, disconnect_command
, _("\
3316 Disconnect from a target.\n\
3317 The target will wait for another debugger to connect. Not available for\n\
3320 c
= add_com ("signal", class_run
, signal_command
, _("\
3321 Continue program with the specified signal.\n\
3322 Usage: signal SIGNAL\n\
3323 The SIGNAL argument is processed the same as the handle command.\n\
3325 An argument of \"0\" means continue the program without sending it a signal.\n\
3326 This is useful in cases where the program stopped because of a signal,\n\
3327 and you want to resume the program while discarding the signal.\n\
3329 In a multi-threaded program the signal is delivered to, or discarded from,\n\
3330 the current thread only."));
3331 set_cmd_completer (c
, signal_completer
);
3333 c
= add_com ("queue-signal", class_run
, queue_signal_command
, _("\
3334 Queue a signal to be delivered to the current thread when it is resumed.\n\
3335 Usage: queue-signal SIGNAL\n\
3336 The SIGNAL argument is processed the same as the handle command.\n\
3337 It is an error if the handling state of SIGNAL is \"nopass\".\n\
3339 An argument of \"0\" means remove any currently queued signal from\n\
3340 the current thread. This is useful in cases where the program stopped\n\
3341 because of a signal, and you want to resume it while discarding the signal.\n\
3343 In a multi-threaded program the signal is queued with, or discarded from,\n\
3344 the current thread only."));
3345 set_cmd_completer (c
, signal_completer
);
3347 add_com ("stepi", class_run
, stepi_command
, _("\
3348 Step one instruction exactly.\n\
3350 Argument N means step N times (or till program stops for another \
3352 add_com_alias ("si", "stepi", class_alias
, 0);
3354 add_com ("nexti", class_run
, nexti_command
, _("\
3355 Step one instruction, but proceed through subroutine calls.\n\
3357 Argument N means step N times (or till program stops for another \
3359 add_com_alias ("ni", "nexti", class_alias
, 0);
3361 add_com ("finish", class_run
, finish_command
, _("\
3362 Execute until selected stack frame returns.\n\
3364 Upon return, the value returned is printed and put in the value history."));
3365 add_com_alias ("fin", "finish", class_run
, 1);
3367 add_com ("next", class_run
, next_command
, _("\
3368 Step program, proceeding through subroutine calls.\n\
3370 Unlike \"step\", if the current source line calls a subroutine,\n\
3371 this command does not enter the subroutine, but instead steps over\n\
3372 the call, in effect treating it as a single source line."));
3373 add_com_alias ("n", "next", class_run
, 1);
3375 add_com ("step", class_run
, step_command
, _("\
3376 Step program until it reaches a different source line.\n\
3378 Argument N means step N times (or till program stops for another \
3380 add_com_alias ("s", "step", class_run
, 1);
3382 c
= add_com ("until", class_run
, until_command
, _("\
3383 Execute until the program reaches a source line greater than the current\n\
3384 or a specified location (same args as break command) within the current \
3386 set_cmd_completer (c
, location_completer
);
3387 add_com_alias ("u", "until", class_run
, 1);
3389 c
= add_com ("advance", class_run
, advance_command
, _("\
3390 Continue the program up to the given location (same form as args for break \
3392 Execution will also stop upon exit from the current stack frame."));
3393 set_cmd_completer (c
, location_completer
);
3395 c
= add_com ("jump", class_run
, jump_command
, _("\
3396 Continue program being debugged at specified line or address.\n\
3397 Usage: jump <location>\n\
3398 Give as argument either LINENUM or *ADDR, where ADDR is an expression\n\
3399 for an address to start at."));
3400 set_cmd_completer (c
, location_completer
);
3401 add_com_alias ("j", "jump", class_run
, 1);
3403 add_com ("continue", class_run
, continue_command
, _("\
3404 Continue program being debugged, after signal or breakpoint.\n\
3405 Usage: continue [N]\n\
3406 If proceeding from breakpoint, a number N may be used as an argument,\n\
3407 which means to set the ignore count of that breakpoint to N - 1 (so that\n\
3408 the breakpoint won't break until the Nth time it is reached).\n\
3410 If non-stop mode is enabled, continue only the current thread,\n\
3411 otherwise all the threads in the program are continued. To \n\
3412 continue all stopped threads in non-stop mode, use the -a option.\n\
3413 Specifying -a and an ignore count simultaneously is an error."));
3414 add_com_alias ("c", "cont", class_run
, 1);
3415 add_com_alias ("fg", "cont", class_run
, 1);
3417 c
= add_com ("run", class_run
, run_command
, _("\
3418 Start debugged program. You may specify arguments to give it.\n\
3419 Args may include \"*\", or \"[...]\"; they are expanded using \"sh\".\n\
3420 Input and output redirection with \">\", \"<\", or \">>\" are also \
3422 With no arguments, uses arguments last specified (with \"run\" \
3423 or \"set args\").\n\
3424 To cancel previous arguments and run with no arguments,\n\
3425 use \"set args\" without arguments."));
3426 set_cmd_completer (c
, filename_completer
);
3427 add_com_alias ("r", "run", class_run
, 1);
3429 c
= add_com ("start", class_run
, start_command
, _("\
3430 Run the debugged program until the beginning of the main procedure.\n\
3431 You may specify arguments to give to your program, just as with the\n\
3432 \"run\" command."));
3433 set_cmd_completer (c
, filename_completer
);
3435 add_com ("interrupt", class_run
, interrupt_command
,
3436 _("Interrupt the execution of the debugged program.\n\
3437 If non-stop mode is enabled, interrupt only the current thread,\n\
3438 otherwise all the threads in the program are stopped. To \n\
3439 interrupt all running threads in non-stop mode, use the -a option."));
3441 c
= add_info ("registers", nofp_registers_info
, _("\
3442 List of integer registers and their contents, for selected stack frame.\n\
3443 Register name as argument means describe only that register."));
3444 add_info_alias ("r", "registers", 1);
3445 set_cmd_completer (c
, reg_or_group_completer
);
3447 c
= add_info ("all-registers", all_registers_info
, _("\
3448 List of all registers and their contents, for selected stack frame.\n\
3449 Register name as argument means describe only that register."));
3450 set_cmd_completer (c
, reg_or_group_completer
);
3452 add_info ("program", program_info
,
3453 _("Execution status of the program."));
3455 add_info ("float", float_info
,
3456 _("Print the status of the floating point unit\n"));
3458 add_info ("vector", vector_info
,
3459 _("Print the status of the vector unit\n"));
3461 add_prefix_cmd ("proc", class_info
, info_proc_cmd
,
3463 Show /proc process information about any running process.\n\
3464 Specify any process id, or use the program being debugged by default."),
3465 &info_proc_cmdlist
, "info proc ",
3466 1/*allow-unknown*/, &infolist
);
3468 add_cmd ("mappings", class_info
, info_proc_cmd_mappings
, _("\
3469 List of mapped memory regions."),
3470 &info_proc_cmdlist
);
3472 add_cmd ("stat", class_info
, info_proc_cmd_stat
, _("\
3473 List process info from /proc/PID/stat."),
3474 &info_proc_cmdlist
);
3476 add_cmd ("status", class_info
, info_proc_cmd_status
, _("\
3477 List process info from /proc/PID/status."),
3478 &info_proc_cmdlist
);
3480 add_cmd ("cwd", class_info
, info_proc_cmd_cwd
, _("\
3481 List current working directory of the process."),
3482 &info_proc_cmdlist
);
3484 add_cmd ("cmdline", class_info
, info_proc_cmd_cmdline
, _("\
3485 List command line arguments of the process."),
3486 &info_proc_cmdlist
);
3488 add_cmd ("exe", class_info
, info_proc_cmd_exe
, _("\
3489 List absolute filename for executable of the process."),
3490 &info_proc_cmdlist
);
3492 add_cmd ("all", class_info
, info_proc_cmd_all
, _("\
3493 List all available /proc info."),
3494 &info_proc_cmdlist
);