1 /* Memory-access and commands for "inferior" process, for GDB.
3 Copyright (C) 1986-2017 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
21 #include "arch-utils.h"
36 #include "completer.h"
38 #include "event-top.h"
39 #include "parser-defs.h"
41 #include "reggroups.h"
46 #include "target-descriptions.h"
47 #include "user-regs.h"
48 #include "cli/cli-decode.h"
49 #include "gdbthread.h"
51 #include "inline-frame.h"
52 #include "tracepoint.h"
54 #include "continuations.h"
56 #include "cli/cli-utils.h"
58 #include "thread-fsm.h"
61 #include "common/gdb_optional.h"
63 /* Local functions: */
65 static void info_registers_command (char *, int);
67 static void until_next_command (int);
69 static void until_command (char *, int);
71 static void path_info (char *, int);
73 static void path_command (char *, int);
75 static void unset_command (char *, int);
77 static void info_float_command (char *, int);
79 static void disconnect_command (char *, int);
81 static void unset_environment_command (char *, int);
83 static void set_environment_command (char *, int);
85 static void environment_info (char *, int);
87 static void info_program_command (char *, int);
89 static void finish_command (char *, int);
91 static void signal_command (char *, int);
93 static void jump_command (char *, int);
95 static void step_1 (int, int, char *);
97 static void next_command (char *, int);
99 static void step_command (char *, int);
101 static void run_command (char *, int);
103 void _initialize_infcmd (void);
105 #define ERROR_NO_INFERIOR \
106 if (!target_has_execution) error (_("The program is not being run."));
108 /* Scratch area where string containing arguments to give to the
109 program will be stored by 'set args'. As soon as anything is
110 stored, notice_args_set will move it into per-inferior storage.
111 Arguments are separated by spaces. Empty string (pointer to '\0')
114 static char *inferior_args_scratch
;
116 /* Scratch area where 'set inferior-tty' will store user-provided value.
117 We'll immediate copy it into per-inferior storage. */
119 static char *inferior_io_terminal_scratch
;
121 /* Pid of our debugged inferior, or 0 if no inferior now.
122 Since various parts of infrun.c test this to see whether there is a program
123 being debugged it should be nonzero (currently 3 is used) for remote
126 ptid_t inferior_ptid
;
128 /* Address at which inferior stopped. */
132 /* Nonzero if stopped due to completion of a stack dummy routine. */
134 enum stop_stack_kind stop_stack_dummy
;
136 /* Nonzero if stopped due to a random (unexpected) signal in inferior
139 int stopped_by_random_signal
;
141 /* See inferior.h. */
143 int startup_with_shell
= 1;
146 /* Accessor routines. */
148 /* Set the io terminal for the current inferior. Ownership of
149 TERMINAL_NAME is not transferred. */
152 set_inferior_io_terminal (const char *terminal_name
)
154 xfree (current_inferior ()->terminal
);
156 if (terminal_name
!= NULL
&& *terminal_name
!= '\0')
157 current_inferior ()->terminal
= xstrdup (terminal_name
);
159 current_inferior ()->terminal
= NULL
;
163 get_inferior_io_terminal (void)
165 return current_inferior ()->terminal
;
169 set_inferior_tty_command (char *args
, int from_tty
,
170 struct cmd_list_element
*c
)
172 /* CLI has assigned the user-provided value to inferior_io_terminal_scratch.
173 Now route it to current inferior. */
174 set_inferior_io_terminal (inferior_io_terminal_scratch
);
178 show_inferior_tty_command (struct ui_file
*file
, int from_tty
,
179 struct cmd_list_element
*c
, const char *value
)
181 /* Note that we ignore the passed-in value in favor of computing it
183 const char *inferior_io_terminal
= get_inferior_io_terminal ();
185 if (inferior_io_terminal
== NULL
)
186 inferior_io_terminal
= "";
187 fprintf_filtered (gdb_stdout
,
188 _("Terminal for future runs of program being debugged "
189 "is \"%s\".\n"), inferior_io_terminal
);
193 get_inferior_args (void)
195 if (current_inferior ()->argc
!= 0)
199 n
= construct_inferior_arguments (current_inferior ()->argc
,
200 current_inferior ()->argv
);
201 set_inferior_args (n
);
205 if (current_inferior ()->args
== NULL
)
206 current_inferior ()->args
= xstrdup ("");
208 return current_inferior ()->args
;
211 /* Set the arguments for the current inferior. Ownership of
212 NEWARGS is not transferred. */
215 set_inferior_args (char *newargs
)
217 xfree (current_inferior ()->args
);
218 current_inferior ()->args
= newargs
? xstrdup (newargs
) : NULL
;
219 current_inferior ()->argc
= 0;
220 current_inferior ()->argv
= 0;
224 set_inferior_args_vector (int argc
, char **argv
)
226 current_inferior ()->argc
= argc
;
227 current_inferior ()->argv
= argv
;
230 /* Notice when `set args' is run. */
233 set_args_command (char *args
, int from_tty
, struct cmd_list_element
*c
)
235 /* CLI has assigned the user-provided value to inferior_args_scratch.
236 Now route it to current inferior. */
237 set_inferior_args (inferior_args_scratch
);
240 /* Notice when `show args' is run. */
243 show_args_command (struct ui_file
*file
, int from_tty
,
244 struct cmd_list_element
*c
, const char *value
)
246 /* Note that we ignore the passed-in value in favor of computing it
248 deprecated_show_value_hack (file
, from_tty
, c
, get_inferior_args ());
252 /* Compute command-line string given argument vector. This does the
253 same shell processing as fork_inferior. */
256 construct_inferior_arguments (int argc
, char **argv
)
260 if (startup_with_shell
)
263 /* This holds all the characters considered special to the
265 static const char special
[] = "\"!&*|[]{}<>?`~^=;, \t\n";
266 static const char quote
= '"';
268 /* This holds all the characters considered special to the
269 typical Unix shells. We include `^' because the SunOS
270 /bin/sh treats it as a synonym for `|'. */
271 static const char special
[] = "\"!#$&*()\\|[]{}<>?'`~^; \t\n";
272 static const char quote
= '\'';
278 /* We over-compute the size. It shouldn't matter. */
279 for (i
= 0; i
< argc
; ++i
)
280 length
+= 3 * strlen (argv
[i
]) + 1 + 2 * (argv
[i
][0] == '\0');
282 result
= (char *) xmalloc (length
);
285 for (i
= 0; i
< argc
; ++i
)
290 /* Need to handle empty arguments specially. */
291 if (argv
[i
][0] == '\0')
301 if (strpbrk (argv
[i
], special
))
307 for (cp
= argv
[i
]; *cp
; ++cp
)
311 /* A newline cannot be quoted with a backslash (it
312 just disappears), only by putting it inside
323 if (strchr (special
, *cp
) != NULL
)
339 /* In this case we can't handle arguments that contain spaces,
340 tabs, or newlines -- see breakup_args(). */
344 for (i
= 0; i
< argc
; ++i
)
346 char *cp
= strchr (argv
[i
], ' ');
348 cp
= strchr (argv
[i
], '\t');
350 cp
= strchr (argv
[i
], '\n');
352 error (_("can't handle command-line "
353 "argument containing whitespace"));
354 length
+= strlen (argv
[i
]) + 1;
357 result
= (char *) xmalloc (length
);
359 for (i
= 0; i
< argc
; ++i
)
362 strcat (result
, " ");
363 strcat (result
, argv
[i
]);
371 /* This function strips the '&' character (indicating background
372 execution) that is added as *the last* of the arguments ARGS of a
373 command. A copy of the incoming ARGS without the '&' is returned,
374 unless the resulting string after stripping is empty, in which case
375 NULL is returned. *BG_CHAR_P is an output boolean that indicates
376 whether the '&' character was found. */
379 strip_bg_char (const char *args
, int *bg_char_p
)
383 if (args
== NULL
|| *args
== '\0')
389 p
= args
+ strlen (args
);
393 while (p
> args
&& isspace (p
[-1]))
398 return savestring (args
, p
- args
);
404 return xstrdup (args
);
407 /* Common actions to take after creating any sort of inferior, by any
408 means (running, attaching, connecting, et cetera). The target
409 should be stopped. */
412 post_create_inferior (struct target_ops
*target
, int from_tty
)
415 /* Be sure we own the terminal in case write operations are performed. */
416 target_terminal_ours_for_output ();
418 /* If the target hasn't taken care of this already, do it now.
419 Targets which need to access registers during to_open,
420 to_create_inferior, or to_attach should do it earlier; but many
422 target_find_description ();
424 /* Now that we know the register layout, retrieve current PC. But
425 if the PC is unavailable (e.g., we're opening a core file with
426 missing registers info), ignore it. */
430 stop_pc
= regcache_read_pc (get_current_regcache ());
432 CATCH (ex
, RETURN_MASK_ERROR
)
434 if (ex
.error
!= NOT_AVAILABLE_ERROR
)
435 throw_exception (ex
);
441 const unsigned solib_add_generation
442 = current_program_space
->solib_add_generation
;
444 /* Create the hooks to handle shared library load and unload
446 solib_create_inferior_hook (from_tty
);
448 if (current_program_space
->solib_add_generation
== solib_add_generation
)
450 /* The platform-specific hook should load initial shared libraries,
451 but didn't. FROM_TTY will be incorrectly 0 but such solib
452 targets should be fixed anyway. Call it only after the solib
453 target has been initialized by solib_create_inferior_hook. */
456 warning (_("platform-specific solib_create_inferior_hook did "
457 "not load initial shared libraries."));
459 /* If the solist is global across processes, there's no need to
461 if (!gdbarch_has_global_solist (target_gdbarch ()))
462 solib_add (NULL
, 0, auto_solib_add
);
466 /* If the user sets watchpoints before execution having started,
467 then she gets software watchpoints, because GDB can't know which
468 target will end up being pushed, or if it supports hardware
469 watchpoints or not. breakpoint_re_set takes care of promoting
470 watchpoints to hardware watchpoints if possible, however, if this
471 new inferior doesn't load shared libraries or we don't pull in
472 symbols from any other source on this target/arch,
473 breakpoint_re_set is never called. Call it now so that software
474 watchpoints get a chance to be promoted to hardware watchpoints
475 if the now pushed target supports hardware watchpoints. */
476 breakpoint_re_set ();
478 observer_notify_inferior_created (target
, from_tty
);
481 /* Kill the inferior if already running. This function is designed
482 to be called when we are about to start the execution of the program
483 from the beginning. Ask the user to confirm that he wants to restart
484 the program being debugged when FROM_TTY is non-null. */
487 kill_if_already_running (int from_tty
)
489 if (! ptid_equal (inferior_ptid
, null_ptid
) && target_has_execution
)
491 /* Bail out before killing the program if we will not be able to
493 target_require_runnable ();
496 && !query (_("The program being debugged has been started already.\n\
497 Start it from the beginning? ")))
498 error (_("Program not restarted."));
503 /* See inferior.h. */
506 prepare_execution_command (struct target_ops
*target
, int background
)
508 /* If we get a request for running in the bg but the target
509 doesn't support it, error out. */
510 if (background
&& !target
->to_can_async_p (target
))
511 error (_("Asynchronous execution not supported on this target."));
515 /* If we get a request for running in the fg, then we need to
516 simulate synchronous (fg) execution. Note no cleanup is
517 necessary for this. stdin is re-enabled whenever an error
518 reaches the top level. */
519 all_uis_on_sync_execution_starting ();
523 /* Implement the "run" command. If TBREAK_AT_MAIN is set, then insert
524 a temporary breakpoint at the begining of the main program before
525 running the program. */
528 run_command_1 (char *args
, int from_tty
, int tbreak_at_main
)
530 const char *exec_file
;
531 struct cleanup
*old_chain
;
533 struct ui_out
*uiout
= current_uiout
;
534 struct target_ops
*run_target
;
536 struct cleanup
*args_chain
;
540 kill_if_already_running (from_tty
);
542 init_wait_for_inferior ();
543 clear_breakpoint_hit_counts ();
545 /* Clean up any leftovers from other runs. Some other things from
546 this function should probably be moved into target_pre_inferior. */
547 target_pre_inferior (from_tty
);
549 /* The comment here used to read, "The exec file is re-read every
550 time we do a generic_mourn_inferior, so we just have to worry
551 about the symbol file." The `generic_mourn_inferior' function
552 gets called whenever the program exits. However, suppose the
553 program exits, and *then* the executable file changes? We need
554 to check again here. Since reopen_exec_file doesn't do anything
555 if the timestamp hasn't changed, I don't see the harm. */
559 args
= strip_bg_char (args
, &async_exec
);
560 args_chain
= make_cleanup (xfree
, args
);
562 /* Do validation and preparation before possibly changing anything
565 run_target
= find_run_target ();
567 prepare_execution_command (run_target
, async_exec
);
569 if (non_stop
&& !run_target
->to_supports_non_stop (run_target
))
570 error (_("The target does not support running in non-stop mode."));
572 /* Done. Can now set breakpoints, change inferior args, etc. */
574 /* Insert the temporary breakpoint if a location was specified. */
576 tbreak_command (main_name (), 0);
578 exec_file
= get_exec_file (0);
580 /* We keep symbols from add-symbol-file, on the grounds that the
581 user might want to add some symbols before running the program
582 (right?). But sometimes (dynamic loading where the user manually
583 introduces the new symbols with add-symbol-file), the code which
584 the symbols describe does not persist between runs. Currently
585 the user has to manually nuke all symbols between runs if they
586 want them to go away (PR 2207). This is probably reasonable. */
588 /* If there were other args, beside '&', process them. */
590 set_inferior_args (args
);
594 uiout
->field_string (NULL
, "Starting program");
597 uiout
->field_string ("execfile", exec_file
);
599 /* We call get_inferior_args() because we might need to compute
601 uiout
->field_string ("infargs", get_inferior_args ());
606 /* Done with ARGS. */
607 do_cleanups (args_chain
);
609 /* We call get_inferior_args() because we might need to compute
611 run_target
->to_create_inferior (run_target
, exec_file
,
612 std::string (get_inferior_args ()),
613 current_inferior ()->environment
.envp (),
615 /* to_create_inferior should push the target, so after this point we
616 shouldn't refer to run_target again. */
619 /* We're starting off a new process. When we get out of here, in
620 non-stop mode, finish the state of all threads of that process,
621 but leave other threads alone, as they may be stopped in internal
622 events --- the frontend shouldn't see them as stopped. In
623 all-stop, always finish the state of all threads, as we may be
624 resuming more than just the new process. */
626 ptid
= pid_to_ptid (ptid_get_pid (inferior_ptid
));
628 ptid
= minus_one_ptid
;
629 old_chain
= make_cleanup (finish_thread_state_cleanup
, &ptid
);
631 /* Pass zero for FROM_TTY, because at this point the "run" command
632 has done its thing; now we are setting up the running program. */
633 post_create_inferior (¤t_target
, 0);
635 /* Start the target running. Do not use -1 continuation as it would skip
636 breakpoint right at the entry point. */
637 proceed (regcache_read_pc (get_current_regcache ()), GDB_SIGNAL_0
);
639 /* Since there was no error, there's no need to finish the thread
641 discard_cleanups (old_chain
);
645 run_command (char *args
, int from_tty
)
647 run_command_1 (args
, from_tty
, 0);
650 /* Start the execution of the program up until the beginning of the main
654 start_command (char *args
, int from_tty
)
656 /* Some languages such as Ada need to search inside the program
657 minimal symbols for the location where to put the temporary
658 breakpoint before starting. */
659 if (!have_minimal_symbols ())
660 error (_("No symbol table loaded. Use the \"file\" command."));
662 /* Run the program until reaching the main procedure... */
663 run_command_1 (args
, from_tty
, 1);
667 proceed_thread_callback (struct thread_info
*thread
, void *arg
)
669 /* We go through all threads individually instead of compressing
670 into a single target `resume_all' request, because some threads
671 may be stopped in internal breakpoints/events, or stopped waiting
672 for its turn in the displaced stepping queue (that is, they are
673 running && !executing). The target side has no idea about why
674 the thread is stopped, so a `resume_all' command would resume too
675 much. If/when GDB gains a way to tell the target `hold this
676 thread stopped until I say otherwise', then we can optimize
678 if (!is_stopped (thread
->ptid
))
681 switch_to_thread (thread
->ptid
);
682 clear_proceed_status (0);
683 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
688 ensure_valid_thread (void)
690 if (ptid_equal (inferior_ptid
, null_ptid
)
691 || is_exited (inferior_ptid
))
692 error (_("Cannot execute this command without a live selected thread."));
695 /* If the user is looking at trace frames, any resumption of execution
696 is likely to mix up recorded and live target data. So simply
697 disallow those commands. */
700 ensure_not_tfind_mode (void)
702 if (get_traceframe_number () >= 0)
703 error (_("Cannot execute this command while looking at trace frames."));
706 /* Throw an error indicating the current thread is running. */
709 error_is_running (void)
711 error (_("Cannot execute this command while "
712 "the selected thread is running."));
715 /* Calls error_is_running if the current thread is running. */
718 ensure_not_running (void)
720 if (is_running (inferior_ptid
))
725 continue_1 (int all_threads
)
728 ensure_not_tfind_mode ();
730 if (non_stop
&& all_threads
)
732 /* Don't error out if the current thread is running, because
733 there may be other stopped threads. */
735 /* Backup current thread and selected frame and restore on scope
737 scoped_restore_current_thread restore_thread
;
739 iterate_over_threads (proceed_thread_callback
, NULL
);
741 if (current_ui
->prompt_state
== PROMPT_BLOCKED
)
743 /* If all threads in the target were already running,
744 proceed_thread_callback ends up never calling proceed,
745 and so nothing calls this to put the inferior's terminal
746 settings in effect and remove stdin from the event loop,
747 which we must when running a foreground command. E.g.:
751 <all threads are running now>
754 <no thread was resumed, but the inferior now owns the terminal>
756 target_terminal_inferior ();
761 ensure_valid_thread ();
762 ensure_not_running ();
763 clear_proceed_status (0);
764 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
768 /* continue [-a] [proceed-count] [&] */
771 continue_command (char *args
, int from_tty
)
775 struct cleanup
*args_chain
;
779 /* Find out whether we must run in the background. */
780 args
= strip_bg_char (args
, &async_exec
);
781 args_chain
= make_cleanup (xfree
, args
);
785 if (startswith (args
, "-a"))
788 args
+= sizeof ("-a") - 1;
794 if (!non_stop
&& all_threads
)
795 error (_("`-a' is meaningless in all-stop mode."));
797 if (args
!= NULL
&& all_threads
)
798 error (_("Can't resume all threads and specify "
799 "proceed count simultaneously."));
801 /* If we have an argument left, set proceed count of breakpoint we
808 struct thread_info
*tp
;
811 tp
= find_thread_ptid (inferior_ptid
);
815 struct target_waitstatus ws
;
817 get_last_target_status (&last_ptid
, &ws
);
818 tp
= find_thread_ptid (last_ptid
);
821 bs
= tp
->control
.stop_bpstat
;
823 while ((stat
= bpstat_num (&bs
, &num
)) != 0)
826 set_ignore_count (num
,
827 parse_and_eval_long (args
) - 1,
829 /* set_ignore_count prints a message ending with a period.
830 So print two spaces before "Continuing.". */
832 printf_filtered (" ");
836 if (!stopped
&& from_tty
)
839 ("Not stopped at any breakpoint; argument ignored.\n");
843 /* Done with ARGS. */
844 do_cleanups (args_chain
);
847 ensure_not_tfind_mode ();
849 if (!non_stop
|| !all_threads
)
851 ensure_valid_thread ();
852 ensure_not_running ();
855 prepare_execution_command (¤t_target
, async_exec
);
858 printf_filtered (_("Continuing.\n"));
860 continue_1 (all_threads
);
863 /* Record the starting point of a "step" or "next" command. */
866 set_step_frame (void)
868 frame_info
*frame
= get_current_frame ();
870 symtab_and_line sal
= find_frame_sal (frame
);
871 set_step_info (frame
, sal
);
873 CORE_ADDR pc
= get_frame_pc (frame
);
874 thread_info
*tp
= inferior_thread ();
875 tp
->control
.step_start_function
= find_pc_function (pc
);
878 /* Step until outside of current statement. */
881 step_command (char *count_string
, int from_tty
)
883 step_1 (0, 0, count_string
);
886 /* Likewise, but skip over subroutine calls as if single instructions. */
889 next_command (char *count_string
, int from_tty
)
891 step_1 (1, 0, count_string
);
894 /* Likewise, but step only one instruction. */
897 stepi_command (char *count_string
, int from_tty
)
899 step_1 (0, 1, count_string
);
903 nexti_command (char *count_string
, int from_tty
)
905 step_1 (1, 1, count_string
);
909 delete_longjmp_breakpoint_cleanup (void *arg
)
911 int thread
= * (int *) arg
;
912 delete_longjmp_breakpoint (thread
);
915 /* Data for the FSM that manages the step/next/stepi/nexti
918 struct step_command_fsm
920 /* The base class. */
921 struct thread_fsm thread_fsm
;
923 /* How many steps left in a "step N"-like command. */
926 /* If true, this is a next/nexti, otherwise a step/stepi. */
927 int skip_subroutines
;
929 /* If true, this is a stepi/nexti, otherwise a step/step. */
933 static void step_command_fsm_clean_up (struct thread_fsm
*self
,
934 struct thread_info
*thread
);
935 static int step_command_fsm_should_stop (struct thread_fsm
*self
,
936 struct thread_info
*thread
);
937 static enum async_reply_reason
938 step_command_fsm_async_reply_reason (struct thread_fsm
*self
);
940 /* step_command_fsm's vtable. */
942 static struct thread_fsm_ops step_command_fsm_ops
=
945 step_command_fsm_clean_up
,
946 step_command_fsm_should_stop
,
947 NULL
, /* return_value */
948 step_command_fsm_async_reply_reason
,
951 /* Allocate a new step_command_fsm. */
953 static struct step_command_fsm
*
954 new_step_command_fsm (struct interp
*cmd_interp
)
956 struct step_command_fsm
*sm
;
958 sm
= XCNEW (struct step_command_fsm
);
959 thread_fsm_ctor (&sm
->thread_fsm
, &step_command_fsm_ops
, cmd_interp
);
964 /* Prepare for a step/next/etc. command. Any target resource
965 allocated here is undone in the FSM's clean_up method. */
968 step_command_fsm_prepare (struct step_command_fsm
*sm
,
969 int skip_subroutines
, int single_inst
,
970 int count
, struct thread_info
*thread
)
972 sm
->skip_subroutines
= skip_subroutines
;
973 sm
->single_inst
= single_inst
;
976 /* Leave the si command alone. */
977 if (!sm
->single_inst
|| sm
->skip_subroutines
)
978 set_longjmp_breakpoint (thread
, get_frame_id (get_current_frame ()));
980 thread
->control
.stepping_command
= 1;
983 static int prepare_one_step (struct step_command_fsm
*sm
);
986 step_1 (int skip_subroutines
, int single_inst
, char *count_string
)
990 struct cleanup
*args_chain
;
991 struct thread_info
*thr
;
992 struct step_command_fsm
*step_sm
;
995 ensure_not_tfind_mode ();
996 ensure_valid_thread ();
997 ensure_not_running ();
999 count_string
= strip_bg_char (count_string
, &async_exec
);
1000 args_chain
= make_cleanup (xfree
, count_string
);
1002 prepare_execution_command (¤t_target
, async_exec
);
1004 count
= count_string
? parse_and_eval_long (count_string
) : 1;
1006 /* Done with ARGS. */
1007 do_cleanups (args_chain
);
1009 clear_proceed_status (1);
1011 /* Setup the execution command state machine to handle all the COUNT
1013 thr
= inferior_thread ();
1014 step_sm
= new_step_command_fsm (command_interp ());
1015 thr
->thread_fsm
= &step_sm
->thread_fsm
;
1017 step_command_fsm_prepare (step_sm
, skip_subroutines
,
1018 single_inst
, count
, thr
);
1020 /* Do only one step for now, before returning control to the event
1021 loop. Let the continuation figure out how many other steps we
1022 need to do, and handle them one at the time, through
1024 if (!prepare_one_step (step_sm
))
1025 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
1030 /* Stepped into an inline frame. Pretend that we've
1032 thread_fsm_clean_up (thr
->thread_fsm
, thr
);
1033 proceeded
= normal_stop ();
1035 inferior_event_handler (INF_EXEC_COMPLETE
, NULL
);
1036 all_uis_check_sync_execution_done ();
1040 /* Implementation of the 'should_stop' FSM method for stepping
1041 commands. Called after we are done with one step operation, to
1042 check whether we need to step again, before we print the prompt and
1043 return control to the user. If count is > 1, returns false, as we
1044 will need to keep going. */
1047 step_command_fsm_should_stop (struct thread_fsm
*self
, struct thread_info
*tp
)
1049 struct step_command_fsm
*sm
= (struct step_command_fsm
*) self
;
1051 if (tp
->control
.stop_step
)
1053 /* There are more steps to make, and we did stop due to
1054 ending a stepping range. Do another step. */
1055 if (--sm
->count
> 0)
1056 return prepare_one_step (sm
);
1058 thread_fsm_set_finished (self
);
1064 /* Implementation of the 'clean_up' FSM method for stepping commands. */
1067 step_command_fsm_clean_up (struct thread_fsm
*self
, struct thread_info
*thread
)
1069 struct step_command_fsm
*sm
= (struct step_command_fsm
*) self
;
1071 if (!sm
->single_inst
|| sm
->skip_subroutines
)
1072 delete_longjmp_breakpoint (thread
->global_num
);
1075 /* Implementation of the 'async_reply_reason' FSM method for stepping
1078 static enum async_reply_reason
1079 step_command_fsm_async_reply_reason (struct thread_fsm
*self
)
1081 return EXEC_ASYNC_END_STEPPING_RANGE
;
1084 /* Prepare for one step in "step N". The actual target resumption is
1085 done by the caller. Return true if we're done and should thus
1086 report a stop to the user. Returns false if the target needs to be
1090 prepare_one_step (struct step_command_fsm
*sm
)
1094 struct frame_info
*frame
= get_current_frame ();
1096 /* Don't assume THREAD is a valid thread id. It is set to -1 if
1097 the longjmp breakpoint was not required. Use the
1098 INFERIOR_PTID thread instead, which is the same thread when
1100 struct thread_info
*tp
= inferior_thread ();
1104 if (!sm
->single_inst
)
1108 /* Step at an inlined function behaves like "down". */
1109 if (!sm
->skip_subroutines
1110 && inline_skipped_frames (inferior_ptid
))
1114 /* Pretend that we've ran. */
1115 resume_ptid
= user_visible_resume_ptid (1);
1116 set_running (resume_ptid
, 1);
1118 step_into_inline_frame (inferior_ptid
);
1120 return prepare_one_step (sm
);
1123 pc
= get_frame_pc (frame
);
1124 find_pc_line_pc_range (pc
,
1125 &tp
->control
.step_range_start
,
1126 &tp
->control
.step_range_end
);
1128 tp
->control
.may_range_step
= 1;
1130 /* If we have no line info, switch to stepi mode. */
1131 if (tp
->control
.step_range_end
== 0 && step_stop_if_no_debug
)
1133 tp
->control
.step_range_start
= tp
->control
.step_range_end
= 1;
1134 tp
->control
.may_range_step
= 0;
1136 else if (tp
->control
.step_range_end
== 0)
1140 if (find_pc_partial_function (pc
, &name
,
1141 &tp
->control
.step_range_start
,
1142 &tp
->control
.step_range_end
) == 0)
1143 error (_("Cannot find bounds of current function"));
1145 target_terminal_ours_for_output ();
1146 printf_filtered (_("Single stepping until exit from function %s,"
1147 "\nwhich has no line number information.\n"),
1153 /* Say we are stepping, but stop after one insn whatever it does. */
1154 tp
->control
.step_range_start
= tp
->control
.step_range_end
= 1;
1155 if (!sm
->skip_subroutines
)
1157 Don't step over function calls, not even to functions lacking
1159 tp
->control
.step_over_calls
= STEP_OVER_NONE
;
1162 if (sm
->skip_subroutines
)
1163 tp
->control
.step_over_calls
= STEP_OVER_ALL
;
1169 thread_fsm_set_finished (&sm
->thread_fsm
);
1174 /* Continue program at specified address. */
1177 jump_command (char *arg
, int from_tty
)
1179 struct gdbarch
*gdbarch
= get_current_arch ();
1184 struct cleanup
*args_chain
;
1187 ensure_not_tfind_mode ();
1188 ensure_valid_thread ();
1189 ensure_not_running ();
1191 /* Find out whether we must run in the background. */
1192 arg
= strip_bg_char (arg
, &async_exec
);
1193 args_chain
= make_cleanup (xfree
, arg
);
1195 prepare_execution_command (¤t_target
, async_exec
);
1198 error_no_arg (_("starting address"));
1200 std::vector
<symtab_and_line
> sals
1201 = decode_line_with_last_displayed (arg
, DECODE_LINE_FUNFIRSTLINE
);
1202 if (sals
.size () != 1)
1203 error (_("Unreasonable jump request"));
1205 /* Done with ARGS. */
1206 do_cleanups (args_chain
);
1208 symtab_and_line
&sal
= sals
[0];
1210 if (sal
.symtab
== 0 && sal
.pc
== 0)
1211 error (_("No source file has been specified."));
1213 resolve_sal_pc (&sal
); /* May error out. */
1215 /* See if we are trying to jump to another function. */
1216 fn
= get_frame_function (get_current_frame ());
1217 sfn
= find_pc_function (sal
.pc
);
1218 if (fn
!= NULL
&& sfn
!= fn
)
1220 if (!query (_("Line %d is not in `%s'. Jump anyway? "), sal
.line
,
1221 SYMBOL_PRINT_NAME (fn
)))
1223 error (_("Not confirmed."));
1230 struct obj_section
*section
;
1232 fixup_symbol_section (sfn
, 0);
1233 section
= SYMBOL_OBJ_SECTION (symbol_objfile (sfn
), sfn
);
1234 if (section_is_overlay (section
)
1235 && !section_is_mapped (section
))
1237 if (!query (_("WARNING!!! Destination is in "
1238 "unmapped overlay! Jump anyway? ")))
1240 error (_("Not confirmed."));
1250 printf_filtered (_("Continuing at "));
1251 fputs_filtered (paddress (gdbarch
, addr
), gdb_stdout
);
1252 printf_filtered (".\n");
1255 clear_proceed_status (0);
1256 proceed (addr
, GDB_SIGNAL_0
);
1259 /* Continue program giving it specified signal. */
1262 signal_command (char *signum_exp
, int from_tty
)
1264 enum gdb_signal oursig
;
1266 struct cleanup
*args_chain
;
1268 dont_repeat (); /* Too dangerous. */
1270 ensure_not_tfind_mode ();
1271 ensure_valid_thread ();
1272 ensure_not_running ();
1274 /* Find out whether we must run in the background. */
1275 signum_exp
= strip_bg_char (signum_exp
, &async_exec
);
1276 args_chain
= make_cleanup (xfree
, signum_exp
);
1278 prepare_execution_command (¤t_target
, async_exec
);
1281 error_no_arg (_("signal number"));
1283 /* It would be even slicker to make signal names be valid expressions,
1284 (the type could be "enum $signal" or some such), then the user could
1285 assign them to convenience variables. */
1286 oursig
= gdb_signal_from_name (signum_exp
);
1288 if (oursig
== GDB_SIGNAL_UNKNOWN
)
1290 /* No, try numeric. */
1291 int num
= parse_and_eval_long (signum_exp
);
1294 oursig
= GDB_SIGNAL_0
;
1296 oursig
= gdb_signal_from_command (num
);
1299 do_cleanups (args_chain
);
1301 /* Look for threads other than the current that this command ends up
1302 resuming too (due to schedlock off), and warn if they'll get a
1303 signal delivered. "signal 0" is used to suppress a previous
1304 signal, but if the current thread is no longer the one that got
1305 the signal, then the user is potentially suppressing the signal
1306 of the wrong thread. */
1309 struct thread_info
*tp
;
1311 int must_confirm
= 0;
1313 /* This indicates what will be resumed. Either a single thread,
1314 a whole process, or all threads of all processes. */
1315 resume_ptid
= user_visible_resume_ptid (0);
1317 ALL_NON_EXITED_THREADS (tp
)
1319 if (ptid_equal (tp
->ptid
, inferior_ptid
))
1321 if (!ptid_match (tp
->ptid
, resume_ptid
))
1324 if (tp
->suspend
.stop_signal
!= GDB_SIGNAL_0
1325 && signal_pass_state (tp
->suspend
.stop_signal
))
1328 printf_unfiltered (_("Note:\n"));
1329 printf_unfiltered (_(" Thread %s previously stopped with signal %s, %s.\n"),
1330 print_thread_id (tp
),
1331 gdb_signal_to_name (tp
->suspend
.stop_signal
),
1332 gdb_signal_to_string (tp
->suspend
.stop_signal
));
1338 && !query (_("Continuing thread %s (the current thread) with specified signal will\n"
1339 "still deliver the signals noted above to their respective threads.\n"
1340 "Continue anyway? "),
1341 print_thread_id (inferior_thread ())))
1342 error (_("Not confirmed."));
1347 if (oursig
== GDB_SIGNAL_0
)
1348 printf_filtered (_("Continuing with no signal.\n"));
1350 printf_filtered (_("Continuing with signal %s.\n"),
1351 gdb_signal_to_name (oursig
));
1354 clear_proceed_status (0);
1355 proceed ((CORE_ADDR
) -1, oursig
);
1358 /* Queue a signal to be delivered to the current thread. */
1361 queue_signal_command (char *signum_exp
, int from_tty
)
1363 enum gdb_signal oursig
;
1364 struct thread_info
*tp
;
1367 ensure_not_tfind_mode ();
1368 ensure_valid_thread ();
1369 ensure_not_running ();
1371 if (signum_exp
== NULL
)
1372 error_no_arg (_("signal number"));
1374 /* It would be even slicker to make signal names be valid expressions,
1375 (the type could be "enum $signal" or some such), then the user could
1376 assign them to convenience variables. */
1377 oursig
= gdb_signal_from_name (signum_exp
);
1379 if (oursig
== GDB_SIGNAL_UNKNOWN
)
1381 /* No, try numeric. */
1382 int num
= parse_and_eval_long (signum_exp
);
1385 oursig
= GDB_SIGNAL_0
;
1387 oursig
= gdb_signal_from_command (num
);
1390 if (oursig
!= GDB_SIGNAL_0
1391 && !signal_pass_state (oursig
))
1392 error (_("Signal handling set to not pass this signal to the program."));
1394 tp
= inferior_thread ();
1395 tp
->suspend
.stop_signal
= oursig
;
1398 /* Data for the FSM that manages the until (with no argument)
1401 struct until_next_fsm
1403 /* The base class. */
1404 struct thread_fsm thread_fsm
;
1406 /* The thread that as current when the command was executed. */
1410 static int until_next_fsm_should_stop (struct thread_fsm
*self
,
1411 struct thread_info
*thread
);
1412 static void until_next_fsm_clean_up (struct thread_fsm
*self
,
1413 struct thread_info
*thread
);
1414 static enum async_reply_reason
1415 until_next_fsm_async_reply_reason (struct thread_fsm
*self
);
1417 /* until_next_fsm's vtable. */
1419 static struct thread_fsm_ops until_next_fsm_ops
=
1422 until_next_fsm_clean_up
,
1423 until_next_fsm_should_stop
,
1424 NULL
, /* return_value */
1425 until_next_fsm_async_reply_reason
,
1428 /* Allocate a new until_next_fsm. */
1430 static struct until_next_fsm
*
1431 new_until_next_fsm (struct interp
*cmd_interp
, int thread
)
1433 struct until_next_fsm
*sm
;
1435 sm
= XCNEW (struct until_next_fsm
);
1436 thread_fsm_ctor (&sm
->thread_fsm
, &until_next_fsm_ops
, cmd_interp
);
1438 sm
->thread
= thread
;
1443 /* Implementation of the 'should_stop' FSM method for the until (with
1447 until_next_fsm_should_stop (struct thread_fsm
*self
,
1448 struct thread_info
*tp
)
1450 if (tp
->control
.stop_step
)
1451 thread_fsm_set_finished (self
);
1456 /* Implementation of the 'clean_up' FSM method for the until (with no
1460 until_next_fsm_clean_up (struct thread_fsm
*self
, struct thread_info
*thread
)
1462 struct until_next_fsm
*sm
= (struct until_next_fsm
*) self
;
1464 delete_longjmp_breakpoint (thread
->global_num
);
1467 /* Implementation of the 'async_reply_reason' FSM method for the until
1468 (with no arg) command. */
1470 static enum async_reply_reason
1471 until_next_fsm_async_reply_reason (struct thread_fsm
*self
)
1473 return EXEC_ASYNC_END_STEPPING_RANGE
;
1476 /* Proceed until we reach a different source line with pc greater than
1477 our current one or exit the function. We skip calls in both cases.
1479 Note that eventually this command should probably be changed so
1480 that only source lines are printed out when we hit the breakpoint
1481 we set. This may involve changes to wait_for_inferior and the
1482 proceed status code. */
1485 until_next_command (int from_tty
)
1487 struct frame_info
*frame
;
1489 struct symbol
*func
;
1490 struct symtab_and_line sal
;
1491 struct thread_info
*tp
= inferior_thread ();
1492 int thread
= tp
->global_num
;
1493 struct cleanup
*old_chain
;
1494 struct until_next_fsm
*sm
;
1496 clear_proceed_status (0);
1499 frame
= get_current_frame ();
1501 /* Step until either exited from this function or greater
1502 than the current line (if in symbolic section) or pc (if
1505 pc
= get_frame_pc (frame
);
1506 func
= find_pc_function (pc
);
1510 struct bound_minimal_symbol msymbol
= lookup_minimal_symbol_by_pc (pc
);
1512 if (msymbol
.minsym
== NULL
)
1513 error (_("Execution is not within a known function."));
1515 tp
->control
.step_range_start
= BMSYMBOL_VALUE_ADDRESS (msymbol
);
1516 /* The upper-bound of step_range is exclusive. In order to make PC
1517 within the range, set the step_range_end with PC + 1. */
1518 tp
->control
.step_range_end
= pc
+ 1;
1522 sal
= find_pc_line (pc
, 0);
1524 tp
->control
.step_range_start
= BLOCK_START (SYMBOL_BLOCK_VALUE (func
));
1525 tp
->control
.step_range_end
= sal
.end
;
1527 tp
->control
.may_range_step
= 1;
1529 tp
->control
.step_over_calls
= STEP_OVER_ALL
;
1531 set_longjmp_breakpoint (tp
, get_frame_id (frame
));
1532 old_chain
= make_cleanup (delete_longjmp_breakpoint_cleanup
, &thread
);
1534 sm
= new_until_next_fsm (command_interp (), tp
->global_num
);
1535 tp
->thread_fsm
= &sm
->thread_fsm
;
1536 discard_cleanups (old_chain
);
1538 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
1542 until_command (char *arg
, int from_tty
)
1545 struct cleanup
*args_chain
;
1548 ensure_not_tfind_mode ();
1549 ensure_valid_thread ();
1550 ensure_not_running ();
1552 /* Find out whether we must run in the background. */
1553 arg
= strip_bg_char (arg
, &async_exec
);
1554 args_chain
= make_cleanup (xfree
, arg
);
1556 prepare_execution_command (¤t_target
, async_exec
);
1559 until_break_command (arg
, from_tty
, 0);
1561 until_next_command (from_tty
);
1563 /* Done with ARGS. */
1564 do_cleanups (args_chain
);
1568 advance_command (char *arg
, int from_tty
)
1571 struct cleanup
*args_chain
;
1574 ensure_not_tfind_mode ();
1575 ensure_valid_thread ();
1576 ensure_not_running ();
1579 error_no_arg (_("a location"));
1581 /* Find out whether we must run in the background. */
1582 arg
= strip_bg_char (arg
, &async_exec
);
1583 args_chain
= make_cleanup (xfree
, arg
);
1585 prepare_execution_command (¤t_target
, async_exec
);
1587 until_break_command (arg
, from_tty
, 1);
1589 /* Done with ARGS. */
1590 do_cleanups (args_chain
);
1593 /* Return the value of the result of a function at the end of a 'finish'
1594 command/BP. DTOR_DATA (if not NULL) can represent inferior registers
1595 right after an inferior call has finished. */
1598 get_return_value (struct value
*function
, struct type
*value_type
)
1600 regcache
stop_regs (regcache::readonly
, *get_current_regcache ());
1601 struct gdbarch
*gdbarch
= stop_regs
.arch ();
1602 struct value
*value
;
1604 value_type
= check_typedef (value_type
);
1605 gdb_assert (TYPE_CODE (value_type
) != TYPE_CODE_VOID
);
1607 /* FIXME: 2003-09-27: When returning from a nested inferior function
1608 call, it's possible (with no help from the architecture vector)
1609 to locate and return/print a "struct return" value. This is just
1610 a more complicated case of what is already being done in the
1611 inferior function call code. In fact, when inferior function
1612 calls are made async, this will likely be made the norm. */
1614 switch (gdbarch_return_value (gdbarch
, function
, value_type
,
1617 case RETURN_VALUE_REGISTER_CONVENTION
:
1618 case RETURN_VALUE_ABI_RETURNS_ADDRESS
:
1619 case RETURN_VALUE_ABI_PRESERVES_ADDRESS
:
1620 value
= allocate_value (value_type
);
1621 gdbarch_return_value (gdbarch
, function
, value_type
, &stop_regs
,
1622 value_contents_raw (value
), NULL
);
1624 case RETURN_VALUE_STRUCT_CONVENTION
:
1628 internal_error (__FILE__
, __LINE__
, _("bad switch"));
1634 /* The captured function return value/type and its position in the
1637 struct return_value_info
1639 /* The captured return value. May be NULL if we weren't able to
1640 retrieve it. See get_return_value. */
1641 struct value
*value
;
1643 /* The return type. In some cases, we'll not be able extract the
1644 return value, but we always know the type. */
1647 /* If we captured a value, this is the value history index. */
1648 int value_history_index
;
1651 /* Helper for print_return_value. */
1654 print_return_value_1 (struct ui_out
*uiout
, struct return_value_info
*rv
)
1656 if (rv
->value
!= NULL
)
1658 struct value_print_options opts
;
1661 uiout
->text ("Value returned is ");
1662 uiout
->field_fmt ("gdb-result-var", "$%d",
1663 rv
->value_history_index
);
1664 uiout
->text (" = ");
1665 get_no_prettyformat_print_options (&opts
);
1669 value_print (rv
->value
, &stb
, &opts
);
1670 uiout
->field_stream ("return-value", stb
);
1675 std::string type_name
= type_to_string (rv
->type
);
1676 uiout
->text ("Value returned has type: ");
1677 uiout
->field_string ("return-type", type_name
.c_str ());
1679 uiout
->text (" Cannot determine contents\n");
1683 /* Print the result of a function at the end of a 'finish' command.
1684 RV points at an object representing the captured return value/type
1685 and its position in the value history. */
1688 print_return_value (struct ui_out
*uiout
, struct return_value_info
*rv
)
1690 if (rv
->type
== NULL
|| TYPE_CODE (rv
->type
) == TYPE_CODE_VOID
)
1695 /* print_return_value_1 can throw an exception in some
1696 circumstances. We need to catch this so that we still
1697 delete the breakpoint. */
1698 print_return_value_1 (uiout
, rv
);
1700 CATCH (ex
, RETURN_MASK_ALL
)
1702 exception_print (gdb_stdout
, ex
);
1707 /* Data for the FSM that manages the finish command. */
1709 struct finish_command_fsm
1711 /* The base class. */
1712 struct thread_fsm thread_fsm
;
1714 /* The momentary breakpoint set at the function's return address in
1716 struct breakpoint
*breakpoint
;
1718 /* The function that we're stepping out of. */
1719 struct symbol
*function
;
1721 /* If the FSM finishes successfully, this stores the function's
1723 struct return_value_info return_value
;
1726 static int finish_command_fsm_should_stop (struct thread_fsm
*self
,
1727 struct thread_info
*thread
);
1728 static void finish_command_fsm_clean_up (struct thread_fsm
*self
,
1729 struct thread_info
*thread
);
1730 static struct return_value_info
*
1731 finish_command_fsm_return_value (struct thread_fsm
*self
);
1732 static enum async_reply_reason
1733 finish_command_fsm_async_reply_reason (struct thread_fsm
*self
);
1735 /* finish_command_fsm's vtable. */
1737 static struct thread_fsm_ops finish_command_fsm_ops
=
1740 finish_command_fsm_clean_up
,
1741 finish_command_fsm_should_stop
,
1742 finish_command_fsm_return_value
,
1743 finish_command_fsm_async_reply_reason
,
1744 NULL
, /* should_notify_stop */
1747 /* Allocate a new finish_command_fsm. */
1749 static struct finish_command_fsm
*
1750 new_finish_command_fsm (struct interp
*cmd_interp
)
1752 struct finish_command_fsm
*sm
;
1754 sm
= XCNEW (struct finish_command_fsm
);
1755 thread_fsm_ctor (&sm
->thread_fsm
, &finish_command_fsm_ops
, cmd_interp
);
1760 /* Implementation of the 'should_stop' FSM method for the finish
1761 commands. Detects whether the thread stepped out of the function
1762 successfully, and if so, captures the function's return value and
1763 marks the FSM finished. */
1766 finish_command_fsm_should_stop (struct thread_fsm
*self
,
1767 struct thread_info
*tp
)
1769 struct finish_command_fsm
*f
= (struct finish_command_fsm
*) self
;
1770 struct return_value_info
*rv
= &f
->return_value
;
1772 if (f
->function
!= NULL
1773 && bpstat_find_breakpoint (tp
->control
.stop_bpstat
,
1774 f
->breakpoint
) != NULL
)
1777 thread_fsm_set_finished (self
);
1779 rv
->type
= TYPE_TARGET_TYPE (SYMBOL_TYPE (f
->function
));
1780 if (rv
->type
== NULL
)
1781 internal_error (__FILE__
, __LINE__
,
1782 _("finish_command: function has no target type"));
1784 if (TYPE_CODE (rv
->type
) != TYPE_CODE_VOID
)
1788 func
= read_var_value (f
->function
, NULL
, get_current_frame ());
1789 rv
->value
= get_return_value (func
, rv
->type
);
1790 if (rv
->value
!= NULL
)
1791 rv
->value_history_index
= record_latest_value (rv
->value
);
1794 else if (tp
->control
.stop_step
)
1796 /* Finishing from an inline frame, or reverse finishing. In
1797 either case, there's no way to retrieve the return value. */
1798 thread_fsm_set_finished (self
);
1804 /* Implementation of the 'clean_up' FSM method for the finish
1808 finish_command_fsm_clean_up (struct thread_fsm
*self
,
1809 struct thread_info
*thread
)
1811 struct finish_command_fsm
*f
= (struct finish_command_fsm
*) self
;
1813 if (f
->breakpoint
!= NULL
)
1815 delete_breakpoint (f
->breakpoint
);
1816 f
->breakpoint
= NULL
;
1818 delete_longjmp_breakpoint (thread
->global_num
);
1821 /* Implementation of the 'return_value' FSM method for the finish
1824 static struct return_value_info
*
1825 finish_command_fsm_return_value (struct thread_fsm
*self
)
1827 struct finish_command_fsm
*f
= (struct finish_command_fsm
*) self
;
1829 return &f
->return_value
;
1832 /* Implementation of the 'async_reply_reason' FSM method for the
1835 static enum async_reply_reason
1836 finish_command_fsm_async_reply_reason (struct thread_fsm
*self
)
1838 if (execution_direction
== EXEC_REVERSE
)
1839 return EXEC_ASYNC_END_STEPPING_RANGE
;
1841 return EXEC_ASYNC_FUNCTION_FINISHED
;
1844 /* finish_backward -- helper function for finish_command. */
1847 finish_backward (struct finish_command_fsm
*sm
)
1849 struct symtab_and_line sal
;
1850 struct thread_info
*tp
= inferior_thread ();
1852 CORE_ADDR func_addr
;
1854 pc
= get_frame_pc (get_current_frame ());
1856 if (find_pc_partial_function (pc
, NULL
, &func_addr
, NULL
) == 0)
1857 error (_("Cannot find bounds of current function"));
1859 sal
= find_pc_line (func_addr
, 0);
1861 tp
->control
.proceed_to_finish
= 1;
1862 /* Special case: if we're sitting at the function entry point,
1863 then all we need to do is take a reverse singlestep. We
1864 don't need to set a breakpoint, and indeed it would do us
1867 Note that this can only happen at frame #0, since there's
1868 no way that a function up the stack can have a return address
1869 that's equal to its entry point. */
1873 struct frame_info
*frame
= get_selected_frame (NULL
);
1874 struct gdbarch
*gdbarch
= get_frame_arch (frame
);
1876 /* Set a step-resume at the function's entry point. Once that's
1877 hit, we'll do one more step backwards. */
1878 symtab_and_line sr_sal
;
1880 sr_sal
.pspace
= get_frame_program_space (frame
);
1881 insert_step_resume_breakpoint_at_sal (gdbarch
,
1882 sr_sal
, null_frame_id
);
1884 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
1888 /* We're almost there -- we just need to back up by one more
1890 tp
->control
.step_range_start
= tp
->control
.step_range_end
= 1;
1891 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
1895 /* finish_forward -- helper function for finish_command. FRAME is the
1896 frame that called the function we're about to step out of. */
1899 finish_forward (struct finish_command_fsm
*sm
, struct frame_info
*frame
)
1901 struct frame_id frame_id
= get_frame_id (frame
);
1902 struct gdbarch
*gdbarch
= get_frame_arch (frame
);
1903 struct symtab_and_line sal
;
1904 struct thread_info
*tp
= inferior_thread ();
1906 sal
= find_pc_line (get_frame_pc (frame
), 0);
1907 sal
.pc
= get_frame_pc (frame
);
1909 sm
->breakpoint
= set_momentary_breakpoint (gdbarch
, sal
,
1910 get_stack_frame_id (frame
),
1913 /* set_momentary_breakpoint invalidates FRAME. */
1916 set_longjmp_breakpoint (tp
, frame_id
);
1918 /* We want to print return value, please... */
1919 tp
->control
.proceed_to_finish
= 1;
1921 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
1924 /* Skip frames for "finish". */
1926 static struct frame_info
*
1927 skip_finish_frames (struct frame_info
*frame
)
1929 struct frame_info
*start
;
1935 frame
= skip_tailcall_frames (frame
);
1939 frame
= skip_unwritable_frames (frame
);
1943 while (start
!= frame
);
1948 /* "finish": Set a temporary breakpoint at the place the selected
1949 frame will return to, then continue. */
1952 finish_command (char *arg
, int from_tty
)
1954 struct frame_info
*frame
;
1956 struct cleanup
*args_chain
;
1957 struct finish_command_fsm
*sm
;
1958 struct thread_info
*tp
;
1961 ensure_not_tfind_mode ();
1962 ensure_valid_thread ();
1963 ensure_not_running ();
1965 /* Find out whether we must run in the background. */
1966 arg
= strip_bg_char (arg
, &async_exec
);
1967 args_chain
= make_cleanup (xfree
, arg
);
1969 prepare_execution_command (¤t_target
, async_exec
);
1972 error (_("The \"finish\" command does not take any arguments."));
1974 /* Done with ARGS. */
1975 do_cleanups (args_chain
);
1977 frame
= get_prev_frame (get_selected_frame (_("No selected frame.")));
1979 error (_("\"finish\" not meaningful in the outermost frame."));
1981 clear_proceed_status (0);
1983 tp
= inferior_thread ();
1985 sm
= new_finish_command_fsm (command_interp ());
1987 tp
->thread_fsm
= &sm
->thread_fsm
;
1989 /* Finishing from an inline frame is completely different. We don't
1990 try to show the "return value" - no way to locate it. */
1991 if (get_frame_type (get_selected_frame (_("No selected frame.")))
1994 /* Claim we are stepping in the calling frame. An empty step
1995 range means that we will stop once we aren't in a function
1996 called by that frame. We don't use the magic "1" value for
1997 step_range_end, because then infrun will think this is nexti,
1998 and not step over the rest of this inlined function call. */
1999 set_step_info (frame
, {});
2000 tp
->control
.step_range_start
= get_frame_pc (frame
);
2001 tp
->control
.step_range_end
= tp
->control
.step_range_start
;
2002 tp
->control
.step_over_calls
= STEP_OVER_ALL
;
2004 /* Print info on the selected frame, including level number but not
2008 printf_filtered (_("Run till exit from "));
2009 print_stack_frame (get_selected_frame (NULL
), 1, LOCATION
, 0);
2012 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
2016 /* Find the function we will return from. */
2018 sm
->function
= find_pc_function (get_frame_pc (get_selected_frame (NULL
)));
2020 /* Print info on the selected frame, including level number but not
2024 if (execution_direction
== EXEC_REVERSE
)
2025 printf_filtered (_("Run back to call of "));
2028 if (sm
->function
!= NULL
&& TYPE_NO_RETURN (sm
->function
->type
)
2029 && !query (_("warning: Function %s does not return normally.\n"
2030 "Try to finish anyway? "),
2031 SYMBOL_PRINT_NAME (sm
->function
)))
2032 error (_("Not confirmed."));
2033 printf_filtered (_("Run till exit from "));
2036 print_stack_frame (get_selected_frame (NULL
), 1, LOCATION
, 0);
2039 if (execution_direction
== EXEC_REVERSE
)
2040 finish_backward (sm
);
2043 frame
= skip_finish_frames (frame
);
2046 error (_("Cannot find the caller frame."));
2048 finish_forward (sm
, frame
);
2054 info_program_command (char *args
, int from_tty
)
2058 struct thread_info
*tp
;
2061 if (!target_has_execution
)
2063 printf_filtered (_("The program being debugged is not being run.\n"));
2068 ptid
= inferior_ptid
;
2071 struct target_waitstatus ws
;
2073 get_last_target_status (&ptid
, &ws
);
2076 if (ptid_equal (ptid
, null_ptid
) || is_exited (ptid
))
2077 error (_("Invalid selected thread."));
2078 else if (is_running (ptid
))
2079 error (_("Selected thread is running."));
2081 tp
= find_thread_ptid (ptid
);
2082 bs
= tp
->control
.stop_bpstat
;
2083 stat
= bpstat_num (&bs
, &num
);
2085 target_files_info ();
2086 printf_filtered (_("Program stopped at %s.\n"),
2087 paddress (target_gdbarch (), stop_pc
));
2088 if (tp
->control
.stop_step
)
2089 printf_filtered (_("It stopped after being stepped.\n"));
2092 /* There may be several breakpoints in the same place, so this
2093 isn't as strange as it seems. */
2098 printf_filtered (_("It stopped at a breakpoint "
2099 "that has since been deleted.\n"));
2102 printf_filtered (_("It stopped at breakpoint %d.\n"), num
);
2103 stat
= bpstat_num (&bs
, &num
);
2106 else if (tp
->suspend
.stop_signal
!= GDB_SIGNAL_0
)
2108 printf_filtered (_("It stopped with signal %s, %s.\n"),
2109 gdb_signal_to_name (tp
->suspend
.stop_signal
),
2110 gdb_signal_to_string (tp
->suspend
.stop_signal
));
2115 printf_filtered (_("Type \"info stack\" or \"info "
2116 "registers\" for more information.\n"));
2121 environment_info (char *var
, int from_tty
)
2125 const char *val
= current_inferior ()->environment
.get (var
);
2129 puts_filtered (var
);
2130 puts_filtered (" = ");
2131 puts_filtered (val
);
2132 puts_filtered ("\n");
2136 puts_filtered ("Environment variable \"");
2137 puts_filtered (var
);
2138 puts_filtered ("\" not defined.\n");
2143 char **envp
= current_inferior ()->environment
.envp ();
2145 for (int idx
= 0; envp
[idx
] != NULL
; ++idx
)
2147 puts_filtered (envp
[idx
]);
2148 puts_filtered ("\n");
2154 set_environment_command (char *arg
, int from_tty
)
2156 char *p
, *val
, *var
;
2160 error_no_arg (_("environment variable and value"));
2162 /* Find seperation between variable name and value. */
2163 p
= (char *) strchr (arg
, '=');
2164 val
= (char *) strchr (arg
, ' ');
2166 if (p
!= 0 && val
!= 0)
2168 /* We have both a space and an equals. If the space is before the
2169 equals, walk forward over the spaces til we see a nonspace
2170 (possibly the equals). */
2175 /* Now if the = is after the char following the spaces,
2176 take the char following the spaces. */
2180 else if (val
!= 0 && p
== 0)
2184 error_no_arg (_("environment variable to set"));
2186 if (p
== 0 || p
[1] == 0)
2190 p
= arg
+ strlen (arg
); /* So that savestring below will work. */
2194 /* Not setting variable value to null. */
2196 while (*val
== ' ' || *val
== '\t')
2200 while (p
!= arg
&& (p
[-1] == ' ' || p
[-1] == '\t'))
2203 var
= savestring (arg
, p
- arg
);
2206 printf_filtered (_("Setting environment variable "
2207 "\"%s\" to null value.\n"),
2209 current_inferior ()->environment
.set (var
, "");
2212 current_inferior ()->environment
.set (var
, val
);
2217 unset_environment_command (char *var
, int from_tty
)
2221 /* If there is no argument, delete all environment variables.
2222 Ask for confirmation if reading from the terminal. */
2223 if (!from_tty
|| query (_("Delete all environment variables? ")))
2224 current_inferior ()->environment
.clear ();
2227 current_inferior ()->environment
.unset (var
);
2230 /* Handle the execution path (PATH variable). */
2232 static const char path_var_name
[] = "PATH";
2235 path_info (char *args
, int from_tty
)
2237 puts_filtered ("Executable and object file path: ");
2238 puts_filtered (current_inferior ()->environment
.get (path_var_name
));
2239 puts_filtered ("\n");
2242 /* Add zero or more directories to the front of the execution path. */
2245 path_command (char *dirname
, int from_tty
)
2251 env
= current_inferior ()->environment
.get (path_var_name
);
2252 /* Can be null if path is not set. */
2255 exec_path
= xstrdup (env
);
2256 mod_path (dirname
, &exec_path
);
2257 current_inferior ()->environment
.set (path_var_name
, exec_path
);
2260 path_info ((char *) NULL
, from_tty
);
2264 /* Print out the register NAME with value VAL, to FILE, in the default
2268 default_print_one_register_info (struct ui_file
*file
,
2272 struct type
*regtype
= value_type (val
);
2273 int print_raw_format
;
2275 fputs_filtered (name
, file
);
2276 print_spaces_filtered (15 - strlen (name
), file
);
2278 print_raw_format
= (value_entirely_available (val
)
2279 && !value_optimized_out (val
));
2281 /* If virtual format is floating, print it that way, and in raw
2283 if (TYPE_CODE (regtype
) == TYPE_CODE_FLT
2284 || TYPE_CODE (regtype
) == TYPE_CODE_DECFLOAT
)
2286 struct value_print_options opts
;
2287 const gdb_byte
*valaddr
= value_contents_for_printing (val
);
2288 enum bfd_endian byte_order
= gdbarch_byte_order (get_type_arch (regtype
));
2290 get_user_print_options (&opts
);
2294 value_embedded_offset (val
), 0,
2295 file
, 0, val
, &opts
, current_language
);
2297 if (print_raw_format
)
2299 fprintf_filtered (file
, "\t(raw ");
2300 print_hex_chars (file
, valaddr
, TYPE_LENGTH (regtype
), byte_order
,
2302 fprintf_filtered (file
, ")");
2307 struct value_print_options opts
;
2309 /* Print the register in hex. */
2310 get_formatted_print_options (&opts
, 'x');
2313 value_embedded_offset (val
), 0,
2314 file
, 0, val
, &opts
, current_language
);
2315 /* If not a vector register, print it also according to its
2317 if (print_raw_format
&& TYPE_VECTOR (regtype
) == 0)
2319 get_user_print_options (&opts
);
2321 fprintf_filtered (file
, "\t");
2323 value_embedded_offset (val
), 0,
2324 file
, 0, val
, &opts
, current_language
);
2328 fprintf_filtered (file
, "\n");
2331 /* Print out the machine register regnum. If regnum is -1, print all
2332 registers (print_all == 1) or all non-float and non-vector
2333 registers (print_all == 0).
2335 For most machines, having all_registers_info() print the
2336 register(s) one per line is good enough. If a different format is
2337 required, (eg, for MIPS or Pyramid 90x, which both have lots of
2338 regs), or there is an existing convention for showing all the
2339 registers, define the architecture method PRINT_REGISTERS_INFO to
2340 provide that format. */
2343 default_print_registers_info (struct gdbarch
*gdbarch
,
2344 struct ui_file
*file
,
2345 struct frame_info
*frame
,
2346 int regnum
, int print_all
)
2349 const int numregs
= gdbarch_num_regs (gdbarch
)
2350 + gdbarch_num_pseudo_regs (gdbarch
);
2352 for (i
= 0; i
< numregs
; i
++)
2354 /* Decide between printing all regs, non-float / vector regs, or
2360 if (!gdbarch_register_reggroup_p (gdbarch
, i
, all_reggroup
))
2365 if (!gdbarch_register_reggroup_p (gdbarch
, i
, general_reggroup
))
2375 /* If the register name is empty, it is undefined for this
2376 processor, so don't display anything. */
2377 if (gdbarch_register_name (gdbarch
, i
) == NULL
2378 || *(gdbarch_register_name (gdbarch
, i
)) == '\0')
2381 default_print_one_register_info (file
,
2382 gdbarch_register_name (gdbarch
, i
),
2383 value_of_register (i
, frame
));
2388 registers_info (char *addr_exp
, int fpregs
)
2390 struct frame_info
*frame
;
2391 struct gdbarch
*gdbarch
;
2393 if (!target_has_registers
)
2394 error (_("The program has no registers now."));
2395 frame
= get_selected_frame (NULL
);
2396 gdbarch
= get_frame_arch (frame
);
2400 gdbarch_print_registers_info (gdbarch
, gdb_stdout
,
2405 while (*addr_exp
!= '\0')
2410 /* Skip leading white space. */
2411 addr_exp
= skip_spaces (addr_exp
);
2413 /* Discard any leading ``$''. Check that there is something
2414 resembling a register following it. */
2415 if (addr_exp
[0] == '$')
2417 if (isspace ((*addr_exp
)) || (*addr_exp
) == '\0')
2418 error (_("Missing register name"));
2420 /* Find the start/end of this register name/num/group. */
2422 while ((*addr_exp
) != '\0' && !isspace ((*addr_exp
)))
2426 /* Figure out what we've found and display it. */
2428 /* A register name? */
2430 int regnum
= user_reg_map_name_to_regnum (gdbarch
, start
, end
- start
);
2434 /* User registers lie completely outside of the range of
2435 normal registers. Catch them early so that the target
2437 if (regnum
>= gdbarch_num_regs (gdbarch
)
2438 + gdbarch_num_pseudo_regs (gdbarch
))
2440 struct value
*regval
= value_of_user_reg (regnum
, frame
);
2441 const char *regname
= user_reg_map_regnum_to_name (gdbarch
,
2444 /* Print in the same fashion
2445 gdbarch_print_registers_info's default
2446 implementation prints. */
2447 default_print_one_register_info (gdb_stdout
,
2452 gdbarch_print_registers_info (gdbarch
, gdb_stdout
,
2453 frame
, regnum
, fpregs
);
2458 /* A register group? */
2460 struct reggroup
*group
;
2462 for (group
= reggroup_next (gdbarch
, NULL
);
2464 group
= reggroup_next (gdbarch
, group
))
2466 /* Don't bother with a length check. Should the user
2467 enter a short register group name, go with the first
2468 group that matches. */
2469 if (strncmp (start
, reggroup_name (group
), end
- start
) == 0)
2477 regnum
< gdbarch_num_regs (gdbarch
)
2478 + gdbarch_num_pseudo_regs (gdbarch
);
2481 if (gdbarch_register_reggroup_p (gdbarch
, regnum
, group
))
2482 gdbarch_print_registers_info (gdbarch
,
2490 /* Nothing matched. */
2491 error (_("Invalid register `%.*s'"), (int) (end
- start
), start
);
2496 info_all_registers_command (char *addr_exp
, int from_tty
)
2498 registers_info (addr_exp
, 1);
2502 info_registers_command (char *addr_exp
, int from_tty
)
2504 registers_info (addr_exp
, 0);
2508 print_vector_info (struct ui_file
*file
,
2509 struct frame_info
*frame
, const char *args
)
2511 struct gdbarch
*gdbarch
= get_frame_arch (frame
);
2513 if (gdbarch_print_vector_info_p (gdbarch
))
2514 gdbarch_print_vector_info (gdbarch
, file
, frame
, args
);
2518 int printed_something
= 0;
2521 regnum
< gdbarch_num_regs (gdbarch
)
2522 + gdbarch_num_pseudo_regs (gdbarch
);
2525 if (gdbarch_register_reggroup_p (gdbarch
, regnum
, vector_reggroup
))
2527 printed_something
= 1;
2528 gdbarch_print_registers_info (gdbarch
, file
, frame
, regnum
, 1);
2531 if (!printed_something
)
2532 fprintf_filtered (file
, "No vector information\n");
2537 info_vector_command (char *args
, int from_tty
)
2539 if (!target_has_registers
)
2540 error (_("The program has no registers now."));
2542 print_vector_info (gdb_stdout
, get_selected_frame (NULL
), args
);
2545 /* Kill the inferior process. Make us have no inferior. */
2548 kill_command (char *arg
, int from_tty
)
2550 /* FIXME: This should not really be inferior_ptid (or target_has_execution).
2551 It should be a distinct flag that indicates that a target is active, cuz
2552 some targets don't have processes! */
2554 if (ptid_equal (inferior_ptid
, null_ptid
))
2555 error (_("The program is not being run."));
2556 if (!query (_("Kill the program being debugged? ")))
2557 error (_("Not confirmed."));
2560 /* If we still have other inferiors to debug, then don't mess with
2561 with their threads. */
2562 if (!have_inferiors ())
2564 init_thread_list (); /* Destroy thread info. */
2566 /* Killing off the inferior can leave us with a core file. If
2567 so, print the state we are left in. */
2568 if (target_has_stack
)
2570 printf_filtered (_("In %s,\n"), target_longname
);
2571 print_stack_frame (get_selected_frame (NULL
), 1, SRC_AND_LOC
, 1);
2574 bfd_cache_close_all ();
2577 /* Used in `attach&' command. ARG is a point to an integer
2578 representing a process id. Proceed threads of this process iff
2579 they stopped due to debugger request, and when they did, they
2580 reported a clean stop (GDB_SIGNAL_0). Do not proceed threads
2581 that have been explicitly been told to stop. */
2584 proceed_after_attach_callback (struct thread_info
*thread
,
2587 int pid
= * (int *) arg
;
2589 if (ptid_get_pid (thread
->ptid
) == pid
2590 && !is_exited (thread
->ptid
)
2591 && !is_executing (thread
->ptid
)
2592 && !thread
->stop_requested
2593 && thread
->suspend
.stop_signal
== GDB_SIGNAL_0
)
2595 switch_to_thread (thread
->ptid
);
2596 clear_proceed_status (0);
2597 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
2604 proceed_after_attach (int pid
)
2606 /* Don't error out if the current thread is running, because
2607 there may be other stopped threads. */
2609 /* Backup current thread and selected frame. */
2610 scoped_restore_current_thread restore_thread
;
2612 iterate_over_threads (proceed_after_attach_callback
, &pid
);
2615 /* See inferior.h. */
2618 setup_inferior (int from_tty
)
2620 struct inferior
*inferior
;
2622 inferior
= current_inferior ();
2623 inferior
->needs_setup
= 0;
2625 /* If no exec file is yet known, try to determine it from the
2627 if (get_exec_file (0) == NULL
)
2628 exec_file_locate_attach (ptid_get_pid (inferior_ptid
), 1, from_tty
);
2631 reopen_exec_file ();
2635 /* Take any necessary post-attaching actions for this platform. */
2636 target_post_attach (ptid_get_pid (inferior_ptid
));
2638 post_create_inferior (¤t_target
, from_tty
);
2641 /* What to do after the first program stops after attaching. */
2642 enum attach_post_wait_mode
2644 /* Do nothing. Leaves threads as they are. */
2645 ATTACH_POST_WAIT_NOTHING
,
2647 /* Re-resume threads that are marked running. */
2648 ATTACH_POST_WAIT_RESUME
,
2650 /* Stop all threads. */
2651 ATTACH_POST_WAIT_STOP
,
2654 /* Called after we've attached to a process and we've seen it stop for
2655 the first time. If ASYNC_EXEC is true, re-resume threads that
2656 should be running. Else if ATTACH, */
2659 attach_post_wait (const char *args
, int from_tty
, enum attach_post_wait_mode mode
)
2661 struct inferior
*inferior
;
2663 inferior
= current_inferior ();
2664 inferior
->control
.stop_soon
= NO_STOP_QUIETLY
;
2666 if (inferior
->needs_setup
)
2667 setup_inferior (from_tty
);
2669 if (mode
== ATTACH_POST_WAIT_RESUME
)
2671 /* The user requested an `attach&', so be sure to leave threads
2672 that didn't get a signal running. */
2674 /* Immediatelly resume all suspended threads of this inferior,
2675 and this inferior only. This should have no effect on
2676 already running threads. If a thread has been stopped with a
2677 signal, leave it be. */
2679 proceed_after_attach (inferior
->pid
);
2682 if (inferior_thread ()->suspend
.stop_signal
== GDB_SIGNAL_0
)
2684 clear_proceed_status (0);
2685 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
2689 else if (mode
== ATTACH_POST_WAIT_STOP
)
2691 /* The user requested a plain `attach', so be sure to leave
2692 the inferior stopped. */
2694 /* At least the current thread is already stopped. */
2696 /* In all-stop, by definition, all threads have to be already
2697 stopped at this point. In non-stop, however, although the
2698 selected thread is stopped, others may still be executing.
2699 Be sure to explicitly stop all threads of the process. This
2700 should have no effect on already stopped threads. */
2702 target_stop (pid_to_ptid (inferior
->pid
));
2703 else if (target_is_non_stop_p ())
2705 struct thread_info
*thread
;
2706 struct thread_info
*lowest
= inferior_thread ();
2707 int pid
= current_inferior ()->pid
;
2709 stop_all_threads ();
2711 /* It's not defined which thread will report the attach
2712 stop. For consistency, always select the thread with
2713 lowest GDB number, which should be the main thread, if it
2715 ALL_NON_EXITED_THREADS (thread
)
2717 if (ptid_get_pid (thread
->ptid
) == pid
)
2719 if (thread
->inf
->num
< lowest
->inf
->num
2720 || thread
->per_inf_num
< lowest
->per_inf_num
)
2725 switch_to_thread (lowest
->ptid
);
2728 /* Tell the user/frontend where we're stopped. */
2730 if (deprecated_attach_hook
)
2731 deprecated_attach_hook ();
2735 struct attach_command_continuation_args
2739 enum attach_post_wait_mode mode
;
2743 attach_command_continuation (void *args
, int err
)
2745 struct attach_command_continuation_args
*a
2746 = (struct attach_command_continuation_args
*) args
;
2751 attach_post_wait (a
->args
, a
->from_tty
, a
->mode
);
2755 attach_command_continuation_free_args (void *args
)
2757 struct attach_command_continuation_args
*a
2758 = (struct attach_command_continuation_args
*) args
;
2764 /* "attach" command entry point. Takes a program started up outside
2765 of gdb and ``attaches'' to it. This stops it cold in its tracks
2766 and allows us to start debugging it. */
2769 attach_command (char *args
, int from_tty
)
2772 struct cleanup
*args_chain
;
2773 struct target_ops
*attach_target
;
2774 struct inferior
*inferior
= current_inferior ();
2775 enum attach_post_wait_mode mode
;
2777 dont_repeat (); /* Not for the faint of heart */
2779 if (gdbarch_has_global_solist (target_gdbarch ()))
2780 /* Don't complain if all processes share the same symbol
2783 else if (target_has_execution
)
2785 if (query (_("A program is being debugged already. Kill it? ")))
2788 error (_("Not killed."));
2791 /* Clean up any leftovers from other runs. Some other things from
2792 this function should probably be moved into target_pre_inferior. */
2793 target_pre_inferior (from_tty
);
2795 args
= strip_bg_char (args
, &async_exec
);
2796 args_chain
= make_cleanup (xfree
, args
);
2798 attach_target
= find_attach_target ();
2800 prepare_execution_command (attach_target
, async_exec
);
2802 if (non_stop
&& !attach_target
->to_supports_non_stop (attach_target
))
2803 error (_("Cannot attach to this target in non-stop mode"));
2805 attach_target
->to_attach (attach_target
, args
, from_tty
);
2806 /* to_attach should push the target, so after this point we
2807 shouldn't refer to attach_target again. */
2808 attach_target
= NULL
;
2810 /* Set up the "saved terminal modes" of the inferior
2811 based on what modes we are starting it with. */
2812 target_terminal_init ();
2814 /* Install inferior's terminal modes. This may look like a no-op,
2815 as we've just saved them above, however, this does more than
2816 restore terminal settings:
2818 - installs a SIGINT handler that forwards SIGINT to the inferior.
2819 Otherwise a Ctrl-C pressed just while waiting for the initial
2820 stop would end up as a spurious Quit.
2822 - removes stdin from the event loop, which we need if attaching
2823 in the foreground, otherwise on targets that report an initial
2824 stop on attach (which are most) we'd process input/commands
2825 while we're in the event loop waiting for that stop. That is,
2826 before the attach continuation runs and the command is really
2828 target_terminal_inferior ();
2830 /* Set up execution context to know that we should return from
2831 wait_for_inferior as soon as the target reports a stop. */
2832 init_wait_for_inferior ();
2833 clear_proceed_status (0);
2835 inferior
->needs_setup
= 1;
2837 if (target_is_non_stop_p ())
2839 /* If we find that the current thread isn't stopped, explicitly
2840 do so now, because we're going to install breakpoints and
2844 /* The user requested an `attach&'; stop just one thread. */
2845 target_stop (inferior_ptid
);
2847 /* The user requested an `attach', so stop all threads of this
2849 target_stop (pid_to_ptid (ptid_get_pid (inferior_ptid
)));
2852 mode
= async_exec
? ATTACH_POST_WAIT_RESUME
: ATTACH_POST_WAIT_STOP
;
2854 /* Some system don't generate traps when attaching to inferior.
2855 E.g. Mach 3 or GNU hurd. */
2856 if (!target_attach_no_wait
)
2858 struct attach_command_continuation_args
*a
;
2860 /* Careful here. See comments in inferior.h. Basically some
2861 OSes don't ignore SIGSTOPs on continue requests anymore. We
2862 need a way for handle_inferior_event to reset the stop_signal
2863 variable after an attach, and this is what
2864 STOP_QUIETLY_NO_SIGSTOP is for. */
2865 inferior
->control
.stop_soon
= STOP_QUIETLY_NO_SIGSTOP
;
2867 /* Wait for stop. */
2868 a
= XNEW (struct attach_command_continuation_args
);
2869 a
->args
= xstrdup (args
);
2870 a
->from_tty
= from_tty
;
2872 add_inferior_continuation (attach_command_continuation
, a
,
2873 attach_command_continuation_free_args
);
2874 /* Done with ARGS. */
2875 do_cleanups (args_chain
);
2877 if (!target_is_async_p ())
2878 mark_infrun_async_event_handler ();
2882 /* Done with ARGS. */
2883 do_cleanups (args_chain
);
2885 attach_post_wait (args
, from_tty
, mode
);
2888 /* We had just found out that the target was already attached to an
2889 inferior. PTID points at a thread of this new inferior, that is
2890 the most likely to be stopped right now, but not necessarily so.
2891 The new inferior is assumed to be already added to the inferior
2892 list at this point. If LEAVE_RUNNING, then leave the threads of
2893 this inferior running, except those we've explicitly seen reported
2897 notice_new_inferior (ptid_t ptid
, int leave_running
, int from_tty
)
2899 enum attach_post_wait_mode mode
2900 = leave_running
? ATTACH_POST_WAIT_RESUME
: ATTACH_POST_WAIT_NOTHING
;
2902 gdb::optional
<scoped_restore_current_thread
> restore_thread
;
2904 if (inferior_ptid
!= null_ptid
)
2905 restore_thread
.emplace ();
2907 /* Avoid reading registers -- we haven't fetched the target
2909 switch_to_thread_no_regs (find_thread_ptid (ptid
));
2911 /* When we "notice" a new inferior we need to do all the things we
2912 would normally do if we had just attached to it. */
2914 if (is_executing (inferior_ptid
))
2916 struct attach_command_continuation_args
*a
;
2917 struct inferior
*inferior
= current_inferior ();
2919 /* We're going to install breakpoints, and poke at memory,
2920 ensure that the inferior is stopped for a moment while we do
2922 target_stop (inferior_ptid
);
2924 inferior
->control
.stop_soon
= STOP_QUIETLY_REMOTE
;
2926 /* Wait for stop before proceeding. */
2927 a
= XNEW (struct attach_command_continuation_args
);
2928 a
->args
= xstrdup ("");
2929 a
->from_tty
= from_tty
;
2931 add_inferior_continuation (attach_command_continuation
, a
,
2932 attach_command_continuation_free_args
);
2937 attach_post_wait ("" /* args */, from_tty
, mode
);
2942 * takes a program previously attached to and detaches it.
2943 * The program resumes execution and will no longer stop
2944 * on signals, etc. We better not have left any breakpoints
2945 * in the program or it'll die when it hits one. For this
2946 * to work, it may be necessary for the process to have been
2947 * previously attached. It *might* work if the program was
2948 * started via the normal ptrace (PTRACE_TRACEME).
2952 detach_command (char *args
, int from_tty
)
2954 dont_repeat (); /* Not for the faint of heart. */
2956 if (ptid_equal (inferior_ptid
, null_ptid
))
2957 error (_("The program is not being run."));
2959 query_if_trace_running (from_tty
);
2961 disconnect_tracing ();
2963 target_detach (args
, from_tty
);
2965 /* The current inferior process was just detached successfully. Get
2966 rid of breakpoints that no longer make sense. Note we don't do
2967 this within target_detach because that is also used when
2968 following child forks, and in that case we will want to transfer
2969 breakpoints to the child, not delete them. */
2970 breakpoint_init_inferior (inf_exited
);
2972 /* If the solist is global across inferiors, don't clear it when we
2973 detach from a single inferior. */
2974 if (!gdbarch_has_global_solist (target_gdbarch ()))
2975 no_shared_libraries (NULL
, from_tty
);
2977 /* If we still have inferiors to debug, then don't mess with their
2979 if (!have_inferiors ())
2980 init_thread_list ();
2982 if (deprecated_detach_hook
)
2983 deprecated_detach_hook ();
2986 /* Disconnect from the current target without resuming it (leaving it
2987 waiting for a debugger).
2989 We'd better not have left any breakpoints in the program or the
2990 next debugger will get confused. Currently only supported for some
2991 remote targets, since the normal attach mechanisms don't work on
2992 stopped processes on some native platforms (e.g. GNU/Linux). */
2995 disconnect_command (char *args
, int from_tty
)
2997 dont_repeat (); /* Not for the faint of heart. */
2998 query_if_trace_running (from_tty
);
2999 disconnect_tracing ();
3000 target_disconnect (args
, from_tty
);
3001 no_shared_libraries (NULL
, from_tty
);
3002 init_thread_list ();
3003 if (deprecated_detach_hook
)
3004 deprecated_detach_hook ();
3008 interrupt_target_1 (int all_threads
)
3013 ptid
= minus_one_ptid
;
3015 ptid
= inferior_ptid
;
3020 target_interrupt (ptid
);
3022 /* Tag the thread as having been explicitly requested to stop, so
3023 other parts of gdb know not to resume this thread automatically,
3024 if it was stopped due to an internal event. Limit this to
3025 non-stop mode, as when debugging a multi-threaded application in
3026 all-stop mode, we will only get one stop event --- it's undefined
3027 which thread will report the event. */
3029 set_stop_requested (ptid
, 1);
3033 Stop the execution of the target while running in async mode, in
3034 the background. In all-stop, stop the whole process. In non-stop
3035 mode, stop the current thread only by default, or stop all threads
3036 if the `-a' switch is used. */
3039 interrupt_command (char *args
, int from_tty
)
3041 if (target_can_async_p ())
3043 int all_threads
= 0;
3045 dont_repeat (); /* Not for the faint of heart. */
3048 && startswith (args
, "-a"))
3051 if (!non_stop
&& all_threads
)
3052 error (_("-a is meaningless in all-stop mode."));
3054 interrupt_target_1 (all_threads
);
3058 /* See inferior.h. */
3061 default_print_float_info (struct gdbarch
*gdbarch
, struct ui_file
*file
,
3062 struct frame_info
*frame
, const char *args
)
3065 int printed_something
= 0;
3068 regnum
< gdbarch_num_regs (gdbarch
)
3069 + gdbarch_num_pseudo_regs (gdbarch
);
3072 if (gdbarch_register_reggroup_p (gdbarch
, regnum
, float_reggroup
))
3074 printed_something
= 1;
3075 gdbarch_print_registers_info (gdbarch
, file
, frame
, regnum
, 1);
3078 if (!printed_something
)
3079 fprintf_filtered (file
, "No floating-point info "
3080 "available for this processor.\n");
3084 info_float_command (char *args
, int from_tty
)
3086 struct frame_info
*frame
;
3088 if (!target_has_registers
)
3089 error (_("The program has no registers now."));
3091 frame
= get_selected_frame (NULL
);
3092 gdbarch_print_float_info (get_frame_arch (frame
), gdb_stdout
, frame
, args
);
3096 unset_command (char *args
, int from_tty
)
3098 printf_filtered (_("\"unset\" must be followed by the "
3099 "name of an unset subcommand.\n"));
3100 help_list (unsetlist
, "unset ", all_commands
, gdb_stdout
);
3103 /* Implement `info proc' family of commands. */
3106 info_proc_cmd_1 (char *args
, enum info_proc_what what
, int from_tty
)
3108 struct gdbarch
*gdbarch
= get_current_arch ();
3110 if (!target_info_proc (args
, what
))
3112 if (gdbarch_info_proc_p (gdbarch
))
3113 gdbarch_info_proc (gdbarch
, args
, what
);
3115 error (_("Not supported on this target."));
3119 /* Implement `info proc' when given without any futher parameters. */
3122 info_proc_cmd (char *args
, int from_tty
)
3124 info_proc_cmd_1 (args
, IP_MINIMAL
, from_tty
);
3127 /* Implement `info proc mappings'. */
3130 info_proc_cmd_mappings (char *args
, int from_tty
)
3132 info_proc_cmd_1 (args
, IP_MAPPINGS
, from_tty
);
3135 /* Implement `info proc stat'. */
3138 info_proc_cmd_stat (char *args
, int from_tty
)
3140 info_proc_cmd_1 (args
, IP_STAT
, from_tty
);
3143 /* Implement `info proc status'. */
3146 info_proc_cmd_status (char *args
, int from_tty
)
3148 info_proc_cmd_1 (args
, IP_STATUS
, from_tty
);
3151 /* Implement `info proc cwd'. */
3154 info_proc_cmd_cwd (char *args
, int from_tty
)
3156 info_proc_cmd_1 (args
, IP_CWD
, from_tty
);
3159 /* Implement `info proc cmdline'. */
3162 info_proc_cmd_cmdline (char *args
, int from_tty
)
3164 info_proc_cmd_1 (args
, IP_CMDLINE
, from_tty
);
3167 /* Implement `info proc exe'. */
3170 info_proc_cmd_exe (char *args
, int from_tty
)
3172 info_proc_cmd_1 (args
, IP_EXE
, from_tty
);
3175 /* Implement `info proc all'. */
3178 info_proc_cmd_all (char *args
, int from_tty
)
3180 info_proc_cmd_1 (args
, IP_ALL
, from_tty
);
3184 _initialize_infcmd (void)
3186 static struct cmd_list_element
*info_proc_cmdlist
;
3187 struct cmd_list_element
*c
= NULL
;
3188 const char *cmd_name
;
3190 /* Add the filename of the terminal connected to inferior I/O. */
3191 add_setshow_optional_filename_cmd ("inferior-tty", class_run
,
3192 &inferior_io_terminal_scratch
, _("\
3193 Set terminal for future runs of program being debugged."), _("\
3194 Show terminal for future runs of program being debugged."), _("\
3195 Usage: set inferior-tty [TTY]\n\n\
3196 If TTY is omitted, the default behavior of using the same terminal as GDB\n\
3198 set_inferior_tty_command
,
3199 show_inferior_tty_command
,
3200 &setlist
, &showlist
);
3201 cmd_name
= "inferior-tty";
3202 c
= lookup_cmd (&cmd_name
, setlist
, "", -1, 1);
3203 gdb_assert (c
!= NULL
);
3204 add_alias_cmd ("tty", c
, class_alias
, 0, &cmdlist
);
3207 add_setshow_string_noescape_cmd (cmd_name
, class_run
,
3208 &inferior_args_scratch
, _("\
3209 Set argument list to give program being debugged when it is started."), _("\
3210 Show argument list to give program being debugged when it is started."), _("\
3211 Follow this command with any number of args, to be passed to the program."),
3214 &setlist
, &showlist
);
3215 c
= lookup_cmd (&cmd_name
, setlist
, "", -1, 1);
3216 gdb_assert (c
!= NULL
);
3217 set_cmd_completer (c
, filename_completer
);
3219 c
= add_cmd ("environment", no_class
, environment_info
, _("\
3220 The environment to give the program, or one variable's value.\n\
3221 With an argument VAR, prints the value of environment variable VAR to\n\
3222 give the program being debugged. With no arguments, prints the entire\n\
3223 environment to be given to the program."), &showlist
);
3224 set_cmd_completer (c
, noop_completer
);
3226 add_prefix_cmd ("unset", no_class
, unset_command
,
3227 _("Complement to certain \"set\" commands."),
3228 &unsetlist
, "unset ", 0, &cmdlist
);
3230 c
= add_cmd ("environment", class_run
, unset_environment_command
, _("\
3231 Cancel environment variable VAR for the program.\n\
3232 This does not affect the program until the next \"run\" command."),
3234 set_cmd_completer (c
, noop_completer
);
3236 c
= add_cmd ("environment", class_run
, set_environment_command
, _("\
3237 Set environment variable value to give the program.\n\
3238 Arguments are VAR VALUE where VAR is variable name and VALUE is value.\n\
3239 VALUES of environment variables are uninterpreted strings.\n\
3240 This does not affect the program until the next \"run\" command."),
3242 set_cmd_completer (c
, noop_completer
);
3244 c
= add_com ("path", class_files
, path_command
, _("\
3245 Add directory DIR(s) to beginning of search path for object files.\n\
3246 $cwd in the path means the current working directory.\n\
3247 This path is equivalent to the $PATH shell variable. It is a list of\n\
3248 directories, separated by colons. These directories are searched to find\n\
3249 fully linked executable files and separately compiled object files as \
3251 set_cmd_completer (c
, filename_completer
);
3253 c
= add_cmd ("paths", no_class
, path_info
, _("\
3254 Current search path for finding object files.\n\
3255 $cwd in the path means the current working directory.\n\
3256 This path is equivalent to the $PATH shell variable. It is a list of\n\
3257 directories, separated by colons. These directories are searched to find\n\
3258 fully linked executable files and separately compiled object files as \
3261 set_cmd_completer (c
, noop_completer
);
3263 add_prefix_cmd ("kill", class_run
, kill_command
,
3264 _("Kill execution of program being debugged."),
3265 &killlist
, "kill ", 0, &cmdlist
);
3267 add_com ("attach", class_run
, attach_command
, _("\
3268 Attach to a process or file outside of GDB.\n\
3269 This command attaches to another target, of the same type as your last\n\
3270 \"target\" command (\"info files\" will show your target stack).\n\
3271 The command may take as argument a process id or a device file.\n\
3272 For a process id, you must have permission to send the process a signal,\n\
3273 and it must have the same effective uid as the debugger.\n\
3274 When using \"attach\" with a process id, the debugger finds the\n\
3275 program running in the process, looking first in the current working\n\
3276 directory, or (if not found there) using the source file search path\n\
3277 (see the \"directory\" command). You can also use the \"file\" command\n\
3278 to specify the program, and to load its symbol table."));
3280 add_prefix_cmd ("detach", class_run
, detach_command
, _("\
3281 Detach a process or file previously attached.\n\
3282 If a process, it is no longer traced, and it continues its execution. If\n\
3283 you were debugging a file, the file is closed and gdb no longer accesses it."),
3284 &detachlist
, "detach ", 0, &cmdlist
);
3286 add_com ("disconnect", class_run
, disconnect_command
, _("\
3287 Disconnect from a target.\n\
3288 The target will wait for another debugger to connect. Not available for\n\
3291 c
= add_com ("signal", class_run
, signal_command
, _("\
3292 Continue program with the specified signal.\n\
3293 Usage: signal SIGNAL\n\
3294 The SIGNAL argument is processed the same as the handle command.\n\
3296 An argument of \"0\" means continue the program without sending it a signal.\n\
3297 This is useful in cases where the program stopped because of a signal,\n\
3298 and you want to resume the program while discarding the signal.\n\
3300 In a multi-threaded program the signal is delivered to, or discarded from,\n\
3301 the current thread only."));
3302 set_cmd_completer (c
, signal_completer
);
3304 c
= add_com ("queue-signal", class_run
, queue_signal_command
, _("\
3305 Queue a signal to be delivered to the current thread when it is resumed.\n\
3306 Usage: queue-signal SIGNAL\n\
3307 The SIGNAL argument is processed the same as the handle command.\n\
3308 It is an error if the handling state of SIGNAL is \"nopass\".\n\
3310 An argument of \"0\" means remove any currently queued signal from\n\
3311 the current thread. This is useful in cases where the program stopped\n\
3312 because of a signal, and you want to resume it while discarding the signal.\n\
3314 In a multi-threaded program the signal is queued with, or discarded from,\n\
3315 the current thread only."));
3316 set_cmd_completer (c
, signal_completer
);
3318 add_com ("stepi", class_run
, stepi_command
, _("\
3319 Step one instruction exactly.\n\
3321 Argument N means step N times (or till program stops for another \
3323 add_com_alias ("si", "stepi", class_alias
, 0);
3325 add_com ("nexti", class_run
, nexti_command
, _("\
3326 Step one instruction, but proceed through subroutine calls.\n\
3328 Argument N means step N times (or till program stops for another \
3330 add_com_alias ("ni", "nexti", class_alias
, 0);
3332 add_com ("finish", class_run
, finish_command
, _("\
3333 Execute until selected stack frame returns.\n\
3335 Upon return, the value returned is printed and put in the value history."));
3336 add_com_alias ("fin", "finish", class_run
, 1);
3338 add_com ("next", class_run
, next_command
, _("\
3339 Step program, proceeding through subroutine calls.\n\
3341 Unlike \"step\", if the current source line calls a subroutine,\n\
3342 this command does not enter the subroutine, but instead steps over\n\
3343 the call, in effect treating it as a single source line."));
3344 add_com_alias ("n", "next", class_run
, 1);
3346 add_com ("step", class_run
, step_command
, _("\
3347 Step program until it reaches a different source line.\n\
3349 Argument N means step N times (or till program stops for another \
3351 add_com_alias ("s", "step", class_run
, 1);
3353 c
= add_com ("until", class_run
, until_command
, _("\
3354 Execute until the program reaches a source line greater than the current\n\
3355 or a specified location (same args as break command) within the current \
3357 set_cmd_completer (c
, location_completer
);
3358 add_com_alias ("u", "until", class_run
, 1);
3360 c
= add_com ("advance", class_run
, advance_command
, _("\
3361 Continue the program up to the given location (same form as args for break \
3363 Execution will also stop upon exit from the current stack frame."));
3364 set_cmd_completer (c
, location_completer
);
3366 c
= add_com ("jump", class_run
, jump_command
, _("\
3367 Continue program being debugged at specified line or address.\n\
3368 Usage: jump <location>\n\
3369 Give as argument either LINENUM or *ADDR, where ADDR is an expression\n\
3370 for an address to start at."));
3371 set_cmd_completer (c
, location_completer
);
3372 add_com_alias ("j", "jump", class_run
, 1);
3374 add_com ("continue", class_run
, continue_command
, _("\
3375 Continue program being debugged, after signal or breakpoint.\n\
3376 Usage: continue [N]\n\
3377 If proceeding from breakpoint, a number N may be used as an argument,\n\
3378 which means to set the ignore count of that breakpoint to N - 1 (so that\n\
3379 the breakpoint won't break until the Nth time it is reached).\n\
3381 If non-stop mode is enabled, continue only the current thread,\n\
3382 otherwise all the threads in the program are continued. To \n\
3383 continue all stopped threads in non-stop mode, use the -a option.\n\
3384 Specifying -a and an ignore count simultaneously is an error."));
3385 add_com_alias ("c", "cont", class_run
, 1);
3386 add_com_alias ("fg", "cont", class_run
, 1);
3388 c
= add_com ("run", class_run
, run_command
, _("\
3389 Start debugged program. You may specify arguments to give it.\n\
3390 Args may include \"*\", or \"[...]\"; they are expanded using the\n\
3391 shell that will start the program (specified by the \"$SHELL\"\
3392 environment\nvariable). Input and output redirection with \">\",\
3393 \"<\", or \">>\"\nare also allowed.\n\n\
3394 With no arguments, uses arguments last specified (with \"run\" \
3395 or \"set args\").\n\
3396 To cancel previous arguments and run with no arguments,\n\
3397 use \"set args\" without arguments.\n\
3398 To start the inferior without using a shell, use \"set \
3399 startup-with-shell off\"."));
3400 set_cmd_completer (c
, filename_completer
);
3401 add_com_alias ("r", "run", class_run
, 1);
3403 c
= add_com ("start", class_run
, start_command
, _("\
3404 Run the debugged program until the beginning of the main procedure.\n\
3405 You may specify arguments to give to your program, just as with the\n\
3406 \"run\" command."));
3407 set_cmd_completer (c
, filename_completer
);
3409 add_com ("interrupt", class_run
, interrupt_command
,
3410 _("Interrupt the execution of the debugged program.\n\
3411 If non-stop mode is enabled, interrupt only the current thread,\n\
3412 otherwise all the threads in the program are stopped. To \n\
3413 interrupt all running threads in non-stop mode, use the -a option."));
3415 c
= add_info ("registers", info_registers_command
, _("\
3416 List of integer registers and their contents, for selected stack frame.\n\
3417 Register name as argument means describe only that register."));
3418 add_info_alias ("r", "registers", 1);
3419 set_cmd_completer (c
, reg_or_group_completer
);
3421 c
= add_info ("all-registers", info_all_registers_command
, _("\
3422 List of all registers and their contents, for selected stack frame.\n\
3423 Register name as argument means describe only that register."));
3424 set_cmd_completer (c
, reg_or_group_completer
);
3426 add_info ("program", info_program_command
,
3427 _("Execution status of the program."));
3429 add_info ("float", info_float_command
,
3430 _("Print the status of the floating point unit\n"));
3432 add_info ("vector", info_vector_command
,
3433 _("Print the status of the vector unit\n"));
3435 add_prefix_cmd ("proc", class_info
, info_proc_cmd
,
3437 Show /proc process information about any running process.\n\
3438 Specify any process id, or use the program being debugged by default."),
3439 &info_proc_cmdlist
, "info proc ",
3440 1/*allow-unknown*/, &infolist
);
3442 add_cmd ("mappings", class_info
, info_proc_cmd_mappings
, _("\
3443 List of mapped memory regions."),
3444 &info_proc_cmdlist
);
3446 add_cmd ("stat", class_info
, info_proc_cmd_stat
, _("\
3447 List process info from /proc/PID/stat."),
3448 &info_proc_cmdlist
);
3450 add_cmd ("status", class_info
, info_proc_cmd_status
, _("\
3451 List process info from /proc/PID/status."),
3452 &info_proc_cmdlist
);
3454 add_cmd ("cwd", class_info
, info_proc_cmd_cwd
, _("\
3455 List current working directory of the process."),
3456 &info_proc_cmdlist
);
3458 add_cmd ("cmdline", class_info
, info_proc_cmd_cmdline
, _("\
3459 List command line arguments of the process."),
3460 &info_proc_cmdlist
);
3462 add_cmd ("exe", class_info
, info_proc_cmd_exe
, _("\
3463 List absolute filename for executable of the process."),
3464 &info_proc_cmdlist
);
3466 add_cmd ("all", class_info
, info_proc_cmd_all
, _("\
3467 List all available /proc info."),
3468 &info_proc_cmdlist
);