1 /* Memory-access and commands for "inferior" process, for GDB.
3 Copyright (C) 1986-2020 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"
27 #include "gdbsupport/environ.h"
35 #include "completer.h"
38 #include "reggroups.h"
42 #include "observable.h"
43 #include "target-descriptions.h"
44 #include "user-regs.h"
45 #include "gdbthread.h"
47 #include "inline-frame.h"
48 #include "tracepoint.h"
50 #include "continuations.h"
52 #include "thread-fsm.h"
56 #include "gdbsupport/gdb_optional.h"
58 #include "cli/cli-style.h"
60 /* Local functions: */
62 static void until_next_command (int);
64 static void step_1 (int, int, const char *);
66 #define ERROR_NO_INFERIOR \
67 if (!target_has_execution) error (_("The program is not being run."));
69 /* Scratch area where string containing arguments to give to the
70 program will be stored by 'set args'. As soon as anything is
71 stored, notice_args_set will move it into per-inferior storage.
72 Arguments are separated by spaces. Empty string (pointer to '\0')
75 static char *inferior_args_scratch
;
77 /* Scratch area where the new cwd will be stored by 'set cwd'. */
79 static char *inferior_cwd_scratch
;
81 /* Scratch area where 'set inferior-tty' will store user-provided value.
82 We'll immediate copy it into per-inferior storage. */
84 static char *inferior_io_terminal_scratch
;
86 /* Pid of our debugged inferior, or 0 if no inferior now.
87 Since various parts of infrun.c test this to see whether there is a program
88 being debugged it should be nonzero (currently 3 is used) for remote
93 /* Nonzero if stopped due to completion of a stack dummy routine. */
95 enum stop_stack_kind stop_stack_dummy
;
97 /* Nonzero if stopped due to a random (unexpected) signal in inferior
100 int stopped_by_random_signal
;
103 /* Accessor routines. */
105 /* Set the io terminal for the current inferior. Ownership of
106 TERMINAL_NAME is not transferred. */
109 set_inferior_io_terminal (const char *terminal_name
)
111 xfree (current_inferior ()->terminal
);
113 if (terminal_name
!= NULL
&& *terminal_name
!= '\0')
114 current_inferior ()->terminal
= xstrdup (terminal_name
);
116 current_inferior ()->terminal
= NULL
;
120 get_inferior_io_terminal (void)
122 return current_inferior ()->terminal
;
126 set_inferior_tty_command (const char *args
, int from_tty
,
127 struct cmd_list_element
*c
)
129 /* CLI has assigned the user-provided value to inferior_io_terminal_scratch.
130 Now route it to current inferior. */
131 set_inferior_io_terminal (inferior_io_terminal_scratch
);
135 show_inferior_tty_command (struct ui_file
*file
, int from_tty
,
136 struct cmd_list_element
*c
, const char *value
)
138 /* Note that we ignore the passed-in value in favor of computing it
140 const char *inferior_io_terminal
= get_inferior_io_terminal ();
142 if (inferior_io_terminal
== NULL
)
143 inferior_io_terminal
= "";
144 fprintf_filtered (gdb_stdout
,
145 _("Terminal for future runs of program being debugged "
146 "is \"%s\".\n"), inferior_io_terminal
);
150 get_inferior_args (void)
152 if (current_inferior ()->argc
!= 0)
156 n
= construct_inferior_arguments (current_inferior ()->argc
,
157 current_inferior ()->argv
);
158 set_inferior_args (n
);
162 if (current_inferior ()->args
== NULL
)
163 current_inferior ()->args
= xstrdup ("");
165 return current_inferior ()->args
;
168 /* Set the arguments for the current inferior. Ownership of
169 NEWARGS is not transferred. */
172 set_inferior_args (const char *newargs
)
174 xfree (current_inferior ()->args
);
175 current_inferior ()->args
= newargs
? xstrdup (newargs
) : NULL
;
176 current_inferior ()->argc
= 0;
177 current_inferior ()->argv
= 0;
181 set_inferior_args_vector (int argc
, char **argv
)
183 current_inferior ()->argc
= argc
;
184 current_inferior ()->argv
= argv
;
187 /* Notice when `set args' is run. */
190 set_args_command (const char *args
, int from_tty
, struct cmd_list_element
*c
)
192 /* CLI has assigned the user-provided value to inferior_args_scratch.
193 Now route it to current inferior. */
194 set_inferior_args (inferior_args_scratch
);
197 /* Notice when `show args' is run. */
200 show_args_command (struct ui_file
*file
, int from_tty
,
201 struct cmd_list_element
*c
, const char *value
)
203 /* Note that we ignore the passed-in value in favor of computing it
205 deprecated_show_value_hack (file
, from_tty
, c
, get_inferior_args ());
208 /* See gdbsupport/common-inferior.h. */
211 set_inferior_cwd (const char *cwd
)
213 struct inferior
*inf
= current_inferior ();
215 gdb_assert (inf
!= NULL
);
220 inf
->cwd
.reset (xstrdup (cwd
));
223 /* See gdbsupport/common-inferior.h. */
228 return current_inferior ()->cwd
.get ();
231 /* Handle the 'set cwd' command. */
234 set_cwd_command (const char *args
, int from_tty
, struct cmd_list_element
*c
)
236 if (*inferior_cwd_scratch
== '\0')
237 set_inferior_cwd (NULL
);
239 set_inferior_cwd (inferior_cwd_scratch
);
242 /* Handle the 'show cwd' command. */
245 show_cwd_command (struct ui_file
*file
, int from_tty
,
246 struct cmd_list_element
*c
, const char *value
)
248 const char *cwd
= get_inferior_cwd ();
251 fprintf_filtered (gdb_stdout
,
253 You have not set the inferior's current working directory.\n\
254 The inferior will inherit GDB's cwd if native debugging, or the remote\n\
255 server's cwd if remote debugging.\n"));
257 fprintf_filtered (gdb_stdout
,
258 _("Current working directory that will be used "
259 "when starting the inferior is \"%s\".\n"), cwd
);
263 /* Compute command-line string given argument vector. This does the
264 same shell processing as fork_inferior. */
267 construct_inferior_arguments (int argc
, char **argv
)
271 /* ARGC should always be at least 1, but we double check this
272 here. This is also needed to silence -Werror-stringop
274 gdb_assert (argc
> 0);
276 if (startup_with_shell
)
279 /* This holds all the characters considered special to the
281 static const char special
[] = "\"!&*|[]{}<>?`~^=;, \t\n";
282 static const char quote
= '"';
284 /* This holds all the characters considered special to the
285 typical Unix shells. We include `^' because the SunOS
286 /bin/sh treats it as a synonym for `|'. */
287 static const char special
[] = "\"!#$&*()\\|[]{}<>?'`~^; \t\n";
288 static const char quote
= '\'';
294 /* We over-compute the size. It shouldn't matter. */
295 for (i
= 0; i
< argc
; ++i
)
296 length
+= 3 * strlen (argv
[i
]) + 1 + 2 * (argv
[i
][0] == '\0');
298 result
= (char *) xmalloc (length
);
301 for (i
= 0; i
< argc
; ++i
)
306 /* Need to handle empty arguments specially. */
307 if (argv
[i
][0] == '\0')
317 if (strpbrk (argv
[i
], special
))
323 for (cp
= argv
[i
]; *cp
; ++cp
)
327 /* A newline cannot be quoted with a backslash (it
328 just disappears), only by putting it inside
339 if (strchr (special
, *cp
) != NULL
)
355 /* In this case we can't handle arguments that contain spaces,
356 tabs, or newlines -- see breakup_args(). */
360 for (i
= 0; i
< argc
; ++i
)
362 char *cp
= strchr (argv
[i
], ' ');
364 cp
= strchr (argv
[i
], '\t');
366 cp
= strchr (argv
[i
], '\n');
368 error (_("can't handle command-line "
369 "argument containing whitespace"));
370 length
+= strlen (argv
[i
]) + 1;
373 result
= (char *) xmalloc (length
);
375 for (i
= 0; i
< argc
; ++i
)
378 strcat (result
, " ");
379 strcat (result
, argv
[i
]);
387 /* This function strips the '&' character (indicating background
388 execution) that is added as *the last* of the arguments ARGS of a
389 command. A copy of the incoming ARGS without the '&' is returned,
390 unless the resulting string after stripping is empty, in which case
391 NULL is returned. *BG_CHAR_P is an output boolean that indicates
392 whether the '&' character was found. */
394 static gdb::unique_xmalloc_ptr
<char>
395 strip_bg_char (const char *args
, int *bg_char_p
)
399 if (args
== NULL
|| *args
== '\0')
405 p
= args
+ strlen (args
);
409 while (p
> args
&& isspace (p
[-1]))
414 return gdb::unique_xmalloc_ptr
<char>
415 (savestring (args
, p
- args
));
417 return gdb::unique_xmalloc_ptr
<char> (nullptr);
421 return make_unique_xstrdup (args
);
424 /* Common actions to take after creating any sort of inferior, by any
425 means (running, attaching, connecting, et cetera). The target
426 should be stopped. */
429 post_create_inferior (struct target_ops
*target
, int from_tty
)
432 /* Be sure we own the terminal in case write operations are performed. */
433 target_terminal::ours_for_output ();
435 /* If the target hasn't taken care of this already, do it now.
436 Targets which need to access registers during to_open,
437 to_create_inferior, or to_attach should do it earlier; but many
439 target_find_description ();
441 /* Now that we know the register layout, retrieve current PC. But
442 if the PC is unavailable (e.g., we're opening a core file with
443 missing registers info), ignore it. */
444 thread_info
*thr
= inferior_thread ();
446 thr
->suspend
.stop_pc
= 0;
449 regcache
*rc
= get_thread_regcache (thr
);
450 thr
->suspend
.stop_pc
= regcache_read_pc (rc
);
452 catch (const gdb_exception_error
&ex
)
454 if (ex
.error
!= NOT_AVAILABLE_ERROR
)
460 const unsigned solib_add_generation
461 = current_program_space
->solib_add_generation
;
463 /* Create the hooks to handle shared library load and unload
465 solib_create_inferior_hook (from_tty
);
467 if (current_program_space
->solib_add_generation
== solib_add_generation
)
469 /* The platform-specific hook should load initial shared libraries,
470 but didn't. FROM_TTY will be incorrectly 0 but such solib
471 targets should be fixed anyway. Call it only after the solib
472 target has been initialized by solib_create_inferior_hook. */
475 warning (_("platform-specific solib_create_inferior_hook did "
476 "not load initial shared libraries."));
478 /* If the solist is global across processes, there's no need to
480 if (!gdbarch_has_global_solist (target_gdbarch ()))
481 solib_add (NULL
, 0, auto_solib_add
);
485 /* If the user sets watchpoints before execution having started,
486 then she gets software watchpoints, because GDB can't know which
487 target will end up being pushed, or if it supports hardware
488 watchpoints or not. breakpoint_re_set takes care of promoting
489 watchpoints to hardware watchpoints if possible, however, if this
490 new inferior doesn't load shared libraries or we don't pull in
491 symbols from any other source on this target/arch,
492 breakpoint_re_set is never called. Call it now so that software
493 watchpoints get a chance to be promoted to hardware watchpoints
494 if the now pushed target supports hardware watchpoints. */
495 breakpoint_re_set ();
497 gdb::observers::inferior_created
.notify (target
, from_tty
);
500 /* Kill the inferior if already running. This function is designed
501 to be called when we are about to start the execution of the program
502 from the beginning. Ask the user to confirm that he wants to restart
503 the program being debugged when FROM_TTY is non-null. */
506 kill_if_already_running (int from_tty
)
508 if (inferior_ptid
!= null_ptid
&& target_has_execution
)
510 /* Bail out before killing the program if we will not be able to
512 target_require_runnable ();
515 && !query (_("The program being debugged has been started already.\n\
516 Start it from the beginning? ")))
517 error (_("Program not restarted."));
522 /* See inferior.h. */
525 prepare_execution_command (struct target_ops
*target
, int background
)
527 /* If we get a request for running in the bg but the target
528 doesn't support it, error out. */
529 if (background
&& !target
->can_async_p ())
530 error (_("Asynchronous execution not supported on this target."));
534 /* If we get a request for running in the fg, then we need to
535 simulate synchronous (fg) execution. Note no cleanup is
536 necessary for this. stdin is re-enabled whenever an error
537 reaches the top level. */
538 all_uis_on_sync_execution_starting ();
542 /* Determine how the new inferior will behave. */
546 /* Run program without any explicit stop during startup. */
549 /* Stop at the beginning of the program's main function. */
552 /* Stop at the first instruction of the program. */
553 RUN_STOP_AT_FIRST_INSN
556 /* Implement the "run" command. Force a stop during program start if
557 requested by RUN_HOW. */
560 run_command_1 (const char *args
, int from_tty
, enum run_how run_how
)
562 const char *exec_file
;
563 struct ui_out
*uiout
= current_uiout
;
564 struct target_ops
*run_target
;
569 kill_if_already_running (from_tty
);
571 init_wait_for_inferior ();
572 clear_breakpoint_hit_counts ();
574 /* Clean up any leftovers from other runs. Some other things from
575 this function should probably be moved into target_pre_inferior. */
576 target_pre_inferior (from_tty
);
578 /* The comment here used to read, "The exec file is re-read every
579 time we do a generic_mourn_inferior, so we just have to worry
580 about the symbol file." The `generic_mourn_inferior' function
581 gets called whenever the program exits. However, suppose the
582 program exits, and *then* the executable file changes? We need
583 to check again here. Since reopen_exec_file doesn't do anything
584 if the timestamp hasn't changed, I don't see the harm. */
588 gdb::unique_xmalloc_ptr
<char> stripped
= strip_bg_char (args
, &async_exec
);
589 args
= stripped
.get ();
591 /* Do validation and preparation before possibly changing anything
594 run_target
= find_run_target ();
596 prepare_execution_command (run_target
, async_exec
);
598 if (non_stop
&& !run_target
->supports_non_stop ())
599 error (_("The target does not support running in non-stop mode."));
601 /* Done. Can now set breakpoints, change inferior args, etc. */
603 /* Insert temporary breakpoint in main function if requested. */
604 if (run_how
== RUN_STOP_AT_MAIN
)
606 std::string arg
= string_printf ("-qualified %s", main_name ());
607 tbreak_command (arg
.c_str (), 0);
610 exec_file
= get_exec_file (0);
612 /* We keep symbols from add-symbol-file, on the grounds that the
613 user might want to add some symbols before running the program
614 (right?). But sometimes (dynamic loading where the user manually
615 introduces the new symbols with add-symbol-file), the code which
616 the symbols describe does not persist between runs. Currently
617 the user has to manually nuke all symbols between runs if they
618 want them to go away (PR 2207). This is probably reasonable. */
620 /* If there were other args, beside '&', process them. */
622 set_inferior_args (args
);
626 uiout
->field_string (NULL
, "Starting program");
629 uiout
->field_string ("execfile", exec_file
);
631 /* We call get_inferior_args() because we might need to compute
633 uiout
->field_string ("infargs", get_inferior_args ());
638 /* We call get_inferior_args() because we might need to compute
640 run_target
->create_inferior (exec_file
,
641 std::string (get_inferior_args ()),
642 current_inferior ()->environment
.envp (),
644 /* to_create_inferior should push the target, so after this point we
645 shouldn't refer to run_target again. */
648 /* We're starting off a new process. When we get out of here, in
649 non-stop mode, finish the state of all threads of that process,
650 but leave other threads alone, as they may be stopped in internal
651 events --- the frontend shouldn't see them as stopped. In
652 all-stop, always finish the state of all threads, as we may be
653 resuming more than just the new process. */
654 process_stratum_target
*finish_target
;
658 finish_target
= current_inferior ()->process_target ();
659 finish_ptid
= ptid_t (current_inferior ()->pid
);
663 finish_target
= nullptr;
664 finish_ptid
= minus_one_ptid
;
666 scoped_finish_thread_state
finish_state (finish_target
, finish_ptid
);
668 /* Pass zero for FROM_TTY, because at this point the "run" command
669 has done its thing; now we are setting up the running program. */
670 post_create_inferior (current_top_target (), 0);
672 /* Queue a pending event so that the program stops immediately. */
673 if (run_how
== RUN_STOP_AT_FIRST_INSN
)
675 thread_info
*thr
= inferior_thread ();
676 thr
->suspend
.waitstatus_pending_p
= 1;
677 thr
->suspend
.waitstatus
.kind
= TARGET_WAITKIND_STOPPED
;
678 thr
->suspend
.waitstatus
.value
.sig
= GDB_SIGNAL_0
;
681 /* Start the target running. Do not use -1 continuation as it would skip
682 breakpoint right at the entry point. */
683 proceed (regcache_read_pc (get_current_regcache ()), GDB_SIGNAL_0
);
685 /* Since there was no error, there's no need to finish the thread
687 finish_state
.release ();
691 run_command (const char *args
, int from_tty
)
693 run_command_1 (args
, from_tty
, RUN_NORMAL
);
696 /* Start the execution of the program up until the beginning of the main
700 start_command (const char *args
, int from_tty
)
702 /* Some languages such as Ada need to search inside the program
703 minimal symbols for the location where to put the temporary
704 breakpoint before starting. */
705 if (!have_minimal_symbols ())
706 error (_("No symbol table loaded. Use the \"file\" command."));
708 /* Run the program until reaching the main procedure... */
709 run_command_1 (args
, from_tty
, RUN_STOP_AT_MAIN
);
712 /* Start the execution of the program stopping at the first
716 starti_command (const char *args
, int from_tty
)
718 run_command_1 (args
, from_tty
, RUN_STOP_AT_FIRST_INSN
);
722 proceed_thread_callback (struct thread_info
*thread
, void *arg
)
724 /* We go through all threads individually instead of compressing
725 into a single target `resume_all' request, because some threads
726 may be stopped in internal breakpoints/events, or stopped waiting
727 for its turn in the displaced stepping queue (that is, they are
728 running && !executing). The target side has no idea about why
729 the thread is stopped, so a `resume_all' command would resume too
730 much. If/when GDB gains a way to tell the target `hold this
731 thread stopped until I say otherwise', then we can optimize
733 if (thread
->state
!= THREAD_STOPPED
)
736 if (!thread
->inf
->has_execution ())
739 switch_to_thread (thread
);
740 clear_proceed_status (0);
741 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
746 ensure_valid_thread (void)
748 if (inferior_ptid
== null_ptid
749 || inferior_thread ()->state
== THREAD_EXITED
)
750 error (_("Cannot execute this command without a live selected thread."));
753 /* If the user is looking at trace frames, any resumption of execution
754 is likely to mix up recorded and live target data. So simply
755 disallow those commands. */
758 ensure_not_tfind_mode (void)
760 if (get_traceframe_number () >= 0)
761 error (_("Cannot execute this command while looking at trace frames."));
764 /* Throw an error indicating the current thread is running. */
767 error_is_running (void)
769 error (_("Cannot execute this command while "
770 "the selected thread is running."));
773 /* Calls error_is_running if the current thread is running. */
776 ensure_not_running (void)
778 if (inferior_thread ()->state
== THREAD_RUNNING
)
783 continue_1 (int all_threads
)
786 ensure_not_tfind_mode ();
788 if (non_stop
&& all_threads
)
790 /* Don't error out if the current thread is running, because
791 there may be other stopped threads. */
793 /* Backup current thread and selected frame and restore on scope
795 scoped_restore_current_thread restore_thread
;
797 iterate_over_threads (proceed_thread_callback
, NULL
);
799 if (current_ui
->prompt_state
== PROMPT_BLOCKED
)
801 /* If all threads in the target were already running,
802 proceed_thread_callback ends up never calling proceed,
803 and so nothing calls this to put the inferior's terminal
804 settings in effect and remove stdin from the event loop,
805 which we must when running a foreground command. E.g.:
809 <all threads are running now>
812 <no thread was resumed, but the inferior now owns the terminal>
814 target_terminal::inferior ();
819 ensure_valid_thread ();
820 ensure_not_running ();
821 clear_proceed_status (0);
822 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
826 /* continue [-a] [proceed-count] [&] */
829 continue_command (const char *args
, int from_tty
)
832 bool all_threads_p
= false;
836 /* Find out whether we must run in the background. */
837 gdb::unique_xmalloc_ptr
<char> stripped
= strip_bg_char (args
, &async_exec
);
838 args
= stripped
.get ();
842 if (startswith (args
, "-a"))
844 all_threads_p
= true;
845 args
+= sizeof ("-a") - 1;
851 if (!non_stop
&& all_threads_p
)
852 error (_("`-a' is meaningless in all-stop mode."));
854 if (args
!= NULL
&& all_threads_p
)
855 error (_("Can't resume all threads and specify "
856 "proceed count simultaneously."));
858 /* If we have an argument left, set proceed count of breakpoint we
865 struct thread_info
*tp
;
868 tp
= inferior_thread ();
871 process_stratum_target
*last_target
;
874 get_last_target_status (&last_target
, &last_ptid
, nullptr);
875 tp
= find_thread_ptid (last_target
, last_ptid
);
878 bs
= tp
->control
.stop_bpstat
;
880 while ((stat
= bpstat_num (&bs
, &num
)) != 0)
883 set_ignore_count (num
,
884 parse_and_eval_long (args
) - 1,
886 /* set_ignore_count prints a message ending with a period.
887 So print two spaces before "Continuing.". */
889 printf_filtered (" ");
893 if (!stopped
&& from_tty
)
896 ("Not stopped at any breakpoint; argument ignored.\n");
901 ensure_not_tfind_mode ();
903 if (!non_stop
|| !all_threads_p
)
905 ensure_valid_thread ();
906 ensure_not_running ();
909 prepare_execution_command (current_top_target (), async_exec
);
912 printf_filtered (_("Continuing.\n"));
914 continue_1 (all_threads_p
);
917 /* Record the starting point of a "step" or "next" command. */
920 set_step_frame (void)
922 frame_info
*frame
= get_current_frame ();
924 symtab_and_line sal
= find_frame_sal (frame
);
925 set_step_info (frame
, sal
);
927 CORE_ADDR pc
= get_frame_pc (frame
);
928 thread_info
*tp
= inferior_thread ();
929 tp
->control
.step_start_function
= find_pc_function (pc
);
932 /* Step until outside of current statement. */
935 step_command (const char *count_string
, int from_tty
)
937 step_1 (0, 0, count_string
);
940 /* Likewise, but skip over subroutine calls as if single instructions. */
943 next_command (const char *count_string
, int from_tty
)
945 step_1 (1, 0, count_string
);
948 /* Likewise, but step only one instruction. */
951 stepi_command (const char *count_string
, int from_tty
)
953 step_1 (0, 1, count_string
);
957 nexti_command (const char *count_string
, int from_tty
)
959 step_1 (1, 1, count_string
);
962 /* Data for the FSM that manages the step/next/stepi/nexti
965 struct step_command_fsm
: public thread_fsm
967 /* How many steps left in a "step N"-like command. */
970 /* If true, this is a next/nexti, otherwise a step/stepi. */
971 int skip_subroutines
;
973 /* If true, this is a stepi/nexti, otherwise a step/step. */
976 explicit step_command_fsm (struct interp
*cmd_interp
)
977 : thread_fsm (cmd_interp
)
981 void clean_up (struct thread_info
*thread
) override
;
982 bool should_stop (struct thread_info
*thread
) override
;
983 enum async_reply_reason
do_async_reply_reason () override
;
986 /* Prepare for a step/next/etc. command. Any target resource
987 allocated here is undone in the FSM's clean_up method. */
990 step_command_fsm_prepare (struct step_command_fsm
*sm
,
991 int skip_subroutines
, int single_inst
,
992 int count
, struct thread_info
*thread
)
994 sm
->skip_subroutines
= skip_subroutines
;
995 sm
->single_inst
= single_inst
;
998 /* Leave the si command alone. */
999 if (!sm
->single_inst
|| sm
->skip_subroutines
)
1000 set_longjmp_breakpoint (thread
, get_frame_id (get_current_frame ()));
1002 thread
->control
.stepping_command
= 1;
1005 static int prepare_one_step (struct step_command_fsm
*sm
);
1008 step_1 (int skip_subroutines
, int single_inst
, const char *count_string
)
1012 struct thread_info
*thr
;
1013 struct step_command_fsm
*step_sm
;
1016 ensure_not_tfind_mode ();
1017 ensure_valid_thread ();
1018 ensure_not_running ();
1020 gdb::unique_xmalloc_ptr
<char> stripped
1021 = strip_bg_char (count_string
, &async_exec
);
1022 count_string
= stripped
.get ();
1024 prepare_execution_command (current_top_target (), async_exec
);
1026 count
= count_string
? parse_and_eval_long (count_string
) : 1;
1028 clear_proceed_status (1);
1030 /* Setup the execution command state machine to handle all the COUNT
1032 thr
= inferior_thread ();
1033 step_sm
= new step_command_fsm (command_interp ());
1034 thr
->thread_fsm
= step_sm
;
1036 step_command_fsm_prepare (step_sm
, skip_subroutines
,
1037 single_inst
, count
, thr
);
1039 /* Do only one step for now, before returning control to the event
1040 loop. Let the continuation figure out how many other steps we
1041 need to do, and handle them one at the time, through
1043 if (!prepare_one_step (step_sm
))
1044 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
1049 /* Stepped into an inline frame. Pretend that we've
1051 thr
->thread_fsm
->clean_up (thr
);
1052 proceeded
= normal_stop ();
1054 inferior_event_handler (INF_EXEC_COMPLETE
, NULL
);
1055 all_uis_check_sync_execution_done ();
1059 /* Implementation of the 'should_stop' FSM method for stepping
1060 commands. Called after we are done with one step operation, to
1061 check whether we need to step again, before we print the prompt and
1062 return control to the user. If count is > 1, returns false, as we
1063 will need to keep going. */
1066 step_command_fsm::should_stop (struct thread_info
*tp
)
1068 if (tp
->control
.stop_step
)
1070 /* There are more steps to make, and we did stop due to
1071 ending a stepping range. Do another step. */
1073 return prepare_one_step (this);
1081 /* Implementation of the 'clean_up' FSM method for stepping commands. */
1084 step_command_fsm::clean_up (struct thread_info
*thread
)
1086 if (!single_inst
|| skip_subroutines
)
1087 delete_longjmp_breakpoint (thread
->global_num
);
1090 /* Implementation of the 'async_reply_reason' FSM method for stepping
1093 enum async_reply_reason
1094 step_command_fsm::do_async_reply_reason ()
1096 return EXEC_ASYNC_END_STEPPING_RANGE
;
1099 /* Prepare for one step in "step N". The actual target resumption is
1100 done by the caller. Return true if we're done and should thus
1101 report a stop to the user. Returns false if the target needs to be
1105 prepare_one_step (struct step_command_fsm
*sm
)
1109 struct frame_info
*frame
= get_current_frame ();
1111 /* Don't assume THREAD is a valid thread id. It is set to -1 if
1112 the longjmp breakpoint was not required. Use the
1113 INFERIOR_PTID thread instead, which is the same thread when
1115 struct thread_info
*tp
= inferior_thread ();
1119 if (!sm
->single_inst
)
1123 /* Step at an inlined function behaves like "down". */
1124 if (!sm
->skip_subroutines
1125 && inline_skipped_frames (tp
))
1128 const char *fn
= NULL
;
1129 symtab_and_line sal
;
1132 /* Pretend that we've ran. */
1133 resume_ptid
= user_visible_resume_ptid (1);
1134 set_running (tp
->inf
->process_target (), resume_ptid
, true);
1136 step_into_inline_frame (tp
);
1138 frame
= get_current_frame ();
1139 sal
= find_frame_sal (frame
);
1140 sym
= get_frame_function (frame
);
1143 fn
= sym
->print_name ();
1146 || !function_name_is_marked_for_skip (fn
, sal
))
1149 return prepare_one_step (sm
);
1153 pc
= get_frame_pc (frame
);
1154 find_pc_line_pc_range (pc
,
1155 &tp
->control
.step_range_start
,
1156 &tp
->control
.step_range_end
);
1158 tp
->control
.may_range_step
= 1;
1160 /* If we have no line info, switch to stepi mode. */
1161 if (tp
->control
.step_range_end
== 0 && step_stop_if_no_debug
)
1163 tp
->control
.step_range_start
= tp
->control
.step_range_end
= 1;
1164 tp
->control
.may_range_step
= 0;
1166 else if (tp
->control
.step_range_end
== 0)
1170 if (find_pc_partial_function (pc
, &name
,
1171 &tp
->control
.step_range_start
,
1172 &tp
->control
.step_range_end
) == 0)
1173 error (_("Cannot find bounds of current function"));
1175 target_terminal::ours_for_output ();
1176 printf_filtered (_("Single stepping until exit from function %s,"
1177 "\nwhich has no line number information.\n"),
1183 /* Say we are stepping, but stop after one insn whatever it does. */
1184 tp
->control
.step_range_start
= tp
->control
.step_range_end
= 1;
1185 if (!sm
->skip_subroutines
)
1187 Don't step over function calls, not even to functions lacking
1189 tp
->control
.step_over_calls
= STEP_OVER_NONE
;
1192 if (sm
->skip_subroutines
)
1193 tp
->control
.step_over_calls
= STEP_OVER_ALL
;
1199 sm
->set_finished ();
1204 /* Continue program at specified address. */
1207 jump_command (const char *arg
, int from_tty
)
1209 struct gdbarch
*gdbarch
= get_current_arch ();
1216 ensure_not_tfind_mode ();
1217 ensure_valid_thread ();
1218 ensure_not_running ();
1220 /* Find out whether we must run in the background. */
1221 gdb::unique_xmalloc_ptr
<char> stripped
= strip_bg_char (arg
, &async_exec
);
1222 arg
= stripped
.get ();
1224 prepare_execution_command (current_top_target (), async_exec
);
1227 error_no_arg (_("starting address"));
1229 std::vector
<symtab_and_line
> sals
1230 = decode_line_with_last_displayed (arg
, DECODE_LINE_FUNFIRSTLINE
);
1231 if (sals
.size () != 1)
1232 error (_("Unreasonable jump request"));
1234 symtab_and_line
&sal
= sals
[0];
1236 if (sal
.symtab
== 0 && sal
.pc
== 0)
1237 error (_("No source file has been specified."));
1239 resolve_sal_pc (&sal
); /* May error out. */
1241 /* See if we are trying to jump to another function. */
1242 fn
= get_frame_function (get_current_frame ());
1243 sfn
= find_pc_function (sal
.pc
);
1244 if (fn
!= NULL
&& sfn
!= fn
)
1246 if (!query (_("Line %d is not in `%s'. Jump anyway? "), sal
.line
,
1249 error (_("Not confirmed."));
1256 struct obj_section
*section
;
1258 fixup_symbol_section (sfn
, 0);
1259 section
= SYMBOL_OBJ_SECTION (symbol_objfile (sfn
), sfn
);
1260 if (section_is_overlay (section
)
1261 && !section_is_mapped (section
))
1263 if (!query (_("WARNING!!! Destination is in "
1264 "unmapped overlay! Jump anyway? ")))
1266 error (_("Not confirmed."));
1276 printf_filtered (_("Continuing at "));
1277 fputs_filtered (paddress (gdbarch
, addr
), gdb_stdout
);
1278 printf_filtered (".\n");
1281 clear_proceed_status (0);
1282 proceed (addr
, GDB_SIGNAL_0
);
1285 /* Continue program giving it specified signal. */
1288 signal_command (const char *signum_exp
, int from_tty
)
1290 enum gdb_signal oursig
;
1293 dont_repeat (); /* Too dangerous. */
1295 ensure_not_tfind_mode ();
1296 ensure_valid_thread ();
1297 ensure_not_running ();
1299 /* Find out whether we must run in the background. */
1300 gdb::unique_xmalloc_ptr
<char> stripped
1301 = strip_bg_char (signum_exp
, &async_exec
);
1302 signum_exp
= stripped
.get ();
1304 prepare_execution_command (current_top_target (), async_exec
);
1307 error_no_arg (_("signal number"));
1309 /* It would be even slicker to make signal names be valid expressions,
1310 (the type could be "enum $signal" or some such), then the user could
1311 assign them to convenience variables. */
1312 oursig
= gdb_signal_from_name (signum_exp
);
1314 if (oursig
== GDB_SIGNAL_UNKNOWN
)
1316 /* No, try numeric. */
1317 int num
= parse_and_eval_long (signum_exp
);
1320 oursig
= GDB_SIGNAL_0
;
1322 oursig
= gdb_signal_from_command (num
);
1325 /* Look for threads other than the current that this command ends up
1326 resuming too (due to schedlock off), and warn if they'll get a
1327 signal delivered. "signal 0" is used to suppress a previous
1328 signal, but if the current thread is no longer the one that got
1329 the signal, then the user is potentially suppressing the signal
1330 of the wrong thread. */
1333 int must_confirm
= 0;
1335 /* This indicates what will be resumed. Either a single thread,
1336 a whole process, or all threads of all processes. */
1337 ptid_t resume_ptid
= user_visible_resume_ptid (0);
1338 process_stratum_target
*resume_target
1339 = user_visible_resume_target (resume_ptid
);
1341 thread_info
*current
= inferior_thread ();
1343 for (thread_info
*tp
: all_non_exited_threads (resume_target
, resume_ptid
))
1348 if (tp
->suspend
.stop_signal
!= GDB_SIGNAL_0
1349 && signal_pass_state (tp
->suspend
.stop_signal
))
1352 printf_unfiltered (_("Note:\n"));
1353 printf_unfiltered (_(" Thread %s previously stopped with signal %s, %s.\n"),
1354 print_thread_id (tp
),
1355 gdb_signal_to_name (tp
->suspend
.stop_signal
),
1356 gdb_signal_to_string (tp
->suspend
.stop_signal
));
1362 && !query (_("Continuing thread %s (the current thread) with specified signal will\n"
1363 "still deliver the signals noted above to their respective threads.\n"
1364 "Continue anyway? "),
1365 print_thread_id (inferior_thread ())))
1366 error (_("Not confirmed."));
1371 if (oursig
== GDB_SIGNAL_0
)
1372 printf_filtered (_("Continuing with no signal.\n"));
1374 printf_filtered (_("Continuing with signal %s.\n"),
1375 gdb_signal_to_name (oursig
));
1378 clear_proceed_status (0);
1379 proceed ((CORE_ADDR
) -1, oursig
);
1382 /* Queue a signal to be delivered to the current thread. */
1385 queue_signal_command (const char *signum_exp
, int from_tty
)
1387 enum gdb_signal oursig
;
1388 struct thread_info
*tp
;
1391 ensure_not_tfind_mode ();
1392 ensure_valid_thread ();
1393 ensure_not_running ();
1395 if (signum_exp
== NULL
)
1396 error_no_arg (_("signal number"));
1398 /* It would be even slicker to make signal names be valid expressions,
1399 (the type could be "enum $signal" or some such), then the user could
1400 assign them to convenience variables. */
1401 oursig
= gdb_signal_from_name (signum_exp
);
1403 if (oursig
== GDB_SIGNAL_UNKNOWN
)
1405 /* No, try numeric. */
1406 int num
= parse_and_eval_long (signum_exp
);
1409 oursig
= GDB_SIGNAL_0
;
1411 oursig
= gdb_signal_from_command (num
);
1414 if (oursig
!= GDB_SIGNAL_0
1415 && !signal_pass_state (oursig
))
1416 error (_("Signal handling set to not pass this signal to the program."));
1418 tp
= inferior_thread ();
1419 tp
->suspend
.stop_signal
= oursig
;
1422 /* Data for the FSM that manages the until (with no argument)
1425 struct until_next_fsm
: public thread_fsm
1427 /* The thread that as current when the command was executed. */
1430 until_next_fsm (struct interp
*cmd_interp
, int thread
)
1431 : thread_fsm (cmd_interp
),
1436 bool should_stop (struct thread_info
*thread
) override
;
1437 void clean_up (struct thread_info
*thread
) override
;
1438 enum async_reply_reason
do_async_reply_reason () override
;
1441 /* Implementation of the 'should_stop' FSM method for the until (with
1445 until_next_fsm::should_stop (struct thread_info
*tp
)
1447 if (tp
->control
.stop_step
)
1453 /* Implementation of the 'clean_up' FSM method for the until (with no
1457 until_next_fsm::clean_up (struct thread_info
*thread
)
1459 delete_longjmp_breakpoint (thread
->global_num
);
1462 /* Implementation of the 'async_reply_reason' FSM method for the until
1463 (with no arg) command. */
1465 enum async_reply_reason
1466 until_next_fsm::do_async_reply_reason ()
1468 return EXEC_ASYNC_END_STEPPING_RANGE
;
1471 /* Proceed until we reach a different source line with pc greater than
1472 our current one or exit the function. We skip calls in both cases.
1474 Note that eventually this command should probably be changed so
1475 that only source lines are printed out when we hit the breakpoint
1476 we set. This may involve changes to wait_for_inferior and the
1477 proceed status code. */
1480 until_next_command (int from_tty
)
1482 struct frame_info
*frame
;
1484 struct symbol
*func
;
1485 struct symtab_and_line sal
;
1486 struct thread_info
*tp
= inferior_thread ();
1487 int thread
= tp
->global_num
;
1488 struct until_next_fsm
*sm
;
1490 clear_proceed_status (0);
1493 frame
= get_current_frame ();
1495 /* Step until either exited from this function or greater
1496 than the current line (if in symbolic section) or pc (if
1499 pc
= get_frame_pc (frame
);
1500 func
= find_pc_function (pc
);
1504 struct bound_minimal_symbol msymbol
= lookup_minimal_symbol_by_pc (pc
);
1506 if (msymbol
.minsym
== NULL
)
1507 error (_("Execution is not within a known function."));
1509 tp
->control
.step_range_start
= BMSYMBOL_VALUE_ADDRESS (msymbol
);
1510 /* The upper-bound of step_range is exclusive. In order to make PC
1511 within the range, set the step_range_end with PC + 1. */
1512 tp
->control
.step_range_end
= pc
+ 1;
1516 sal
= find_pc_line (pc
, 0);
1518 tp
->control
.step_range_start
= BLOCK_ENTRY_PC (SYMBOL_BLOCK_VALUE (func
));
1519 tp
->control
.step_range_end
= sal
.end
;
1521 tp
->control
.may_range_step
= 1;
1523 tp
->control
.step_over_calls
= STEP_OVER_ALL
;
1525 set_longjmp_breakpoint (tp
, get_frame_id (frame
));
1526 delete_longjmp_breakpoint_cleanup
lj_deleter (thread
);
1528 sm
= new until_next_fsm (command_interp (), tp
->global_num
);
1529 tp
->thread_fsm
= sm
;
1530 lj_deleter
.release ();
1532 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
1536 until_command (const char *arg
, int from_tty
)
1541 ensure_not_tfind_mode ();
1542 ensure_valid_thread ();
1543 ensure_not_running ();
1545 /* Find out whether we must run in the background. */
1546 gdb::unique_xmalloc_ptr
<char> stripped
= strip_bg_char (arg
, &async_exec
);
1547 arg
= stripped
.get ();
1549 prepare_execution_command (current_top_target (), async_exec
);
1552 until_break_command (arg
, from_tty
, 0);
1554 until_next_command (from_tty
);
1558 advance_command (const char *arg
, int from_tty
)
1563 ensure_not_tfind_mode ();
1564 ensure_valid_thread ();
1565 ensure_not_running ();
1568 error_no_arg (_("a location"));
1570 /* Find out whether we must run in the background. */
1571 gdb::unique_xmalloc_ptr
<char> stripped
= strip_bg_char (arg
, &async_exec
);
1572 arg
= stripped
.get ();
1574 prepare_execution_command (current_top_target (), async_exec
);
1576 until_break_command (arg
, from_tty
, 1);
1579 /* Return the value of the result of a function at the end of a 'finish'
1580 command/BP. DTOR_DATA (if not NULL) can represent inferior registers
1581 right after an inferior call has finished. */
1584 get_return_value (struct value
*function
, struct type
*value_type
)
1586 regcache
*stop_regs
= get_current_regcache ();
1587 struct gdbarch
*gdbarch
= stop_regs
->arch ();
1588 struct value
*value
;
1590 value_type
= check_typedef (value_type
);
1591 gdb_assert (TYPE_CODE (value_type
) != TYPE_CODE_VOID
);
1593 /* FIXME: 2003-09-27: When returning from a nested inferior function
1594 call, it's possible (with no help from the architecture vector)
1595 to locate and return/print a "struct return" value. This is just
1596 a more complicated case of what is already being done in the
1597 inferior function call code. In fact, when inferior function
1598 calls are made async, this will likely be made the norm. */
1600 switch (gdbarch_return_value (gdbarch
, function
, value_type
,
1603 case RETURN_VALUE_REGISTER_CONVENTION
:
1604 case RETURN_VALUE_ABI_RETURNS_ADDRESS
:
1605 case RETURN_VALUE_ABI_PRESERVES_ADDRESS
:
1606 value
= allocate_value (value_type
);
1607 gdbarch_return_value (gdbarch
, function
, value_type
, stop_regs
,
1608 value_contents_raw (value
), NULL
);
1610 case RETURN_VALUE_STRUCT_CONVENTION
:
1614 internal_error (__FILE__
, __LINE__
, _("bad switch"));
1620 /* The captured function return value/type and its position in the
1623 struct return_value_info
1625 /* The captured return value. May be NULL if we weren't able to
1626 retrieve it. See get_return_value. */
1627 struct value
*value
;
1629 /* The return type. In some cases, we'll not be able extract the
1630 return value, but we always know the type. */
1633 /* If we captured a value, this is the value history index. */
1634 int value_history_index
;
1637 /* Helper for print_return_value. */
1640 print_return_value_1 (struct ui_out
*uiout
, struct return_value_info
*rv
)
1642 if (rv
->value
!= NULL
)
1644 struct value_print_options opts
;
1647 uiout
->text ("Value returned is ");
1648 uiout
->field_fmt ("gdb-result-var", "$%d",
1649 rv
->value_history_index
);
1650 uiout
->text (" = ");
1651 get_user_print_options (&opts
);
1653 if (opts
.finish_print
)
1656 value_print (rv
->value
, &stb
, &opts
);
1657 uiout
->field_stream ("return-value", stb
);
1660 uiout
->field_string ("return-value", _("<not displayed>"),
1661 metadata_style
.style ());
1666 std::string type_name
= type_to_string (rv
->type
);
1667 uiout
->text ("Value returned has type: ");
1668 uiout
->field_string ("return-type", type_name
.c_str ());
1670 uiout
->text (" Cannot determine contents\n");
1674 /* Print the result of a function at the end of a 'finish' command.
1675 RV points at an object representing the captured return value/type
1676 and its position in the value history. */
1679 print_return_value (struct ui_out
*uiout
, struct return_value_info
*rv
)
1681 if (rv
->type
== NULL
1682 || TYPE_CODE (check_typedef (rv
->type
)) == TYPE_CODE_VOID
)
1687 /* print_return_value_1 can throw an exception in some
1688 circumstances. We need to catch this so that we still
1689 delete the breakpoint. */
1690 print_return_value_1 (uiout
, rv
);
1692 catch (const gdb_exception
&ex
)
1694 exception_print (gdb_stdout
, ex
);
1698 /* Data for the FSM that manages the finish command. */
1700 struct finish_command_fsm
: public thread_fsm
1702 /* The momentary breakpoint set at the function's return address in
1704 breakpoint_up breakpoint
;
1706 /* The function that we're stepping out of. */
1707 struct symbol
*function
= nullptr;
1709 /* If the FSM finishes successfully, this stores the function's
1711 struct return_value_info return_value_info
{};
1713 explicit finish_command_fsm (struct interp
*cmd_interp
)
1714 : thread_fsm (cmd_interp
)
1718 bool should_stop (struct thread_info
*thread
) override
;
1719 void clean_up (struct thread_info
*thread
) override
;
1720 struct return_value_info
*return_value () override
;
1721 enum async_reply_reason
do_async_reply_reason () override
;
1724 /* Implementation of the 'should_stop' FSM method for the finish
1725 commands. Detects whether the thread stepped out of the function
1726 successfully, and if so, captures the function's return value and
1727 marks the FSM finished. */
1730 finish_command_fsm::should_stop (struct thread_info
*tp
)
1732 struct return_value_info
*rv
= &return_value_info
;
1734 if (function
!= NULL
1735 && bpstat_find_breakpoint (tp
->control
.stop_bpstat
,
1736 breakpoint
.get ()) != NULL
)
1741 rv
->type
= TYPE_TARGET_TYPE (SYMBOL_TYPE (function
));
1742 if (rv
->type
== NULL
)
1743 internal_error (__FILE__
, __LINE__
,
1744 _("finish_command: function has no target type"));
1746 if (TYPE_CODE (check_typedef (rv
->type
)) != TYPE_CODE_VOID
)
1750 func
= read_var_value (function
, NULL
, get_current_frame ());
1751 rv
->value
= get_return_value (func
, rv
->type
);
1752 if (rv
->value
!= NULL
)
1753 rv
->value_history_index
= record_latest_value (rv
->value
);
1756 else if (tp
->control
.stop_step
)
1758 /* Finishing from an inline frame, or reverse finishing. In
1759 either case, there's no way to retrieve the return value. */
1766 /* Implementation of the 'clean_up' FSM method for the finish
1770 finish_command_fsm::clean_up (struct thread_info
*thread
)
1772 breakpoint
.reset ();
1773 delete_longjmp_breakpoint (thread
->global_num
);
1776 /* Implementation of the 'return_value' FSM method for the finish
1779 struct return_value_info
*
1780 finish_command_fsm::return_value ()
1782 return &return_value_info
;
1785 /* Implementation of the 'async_reply_reason' FSM method for the
1788 enum async_reply_reason
1789 finish_command_fsm::do_async_reply_reason ()
1791 if (execution_direction
== EXEC_REVERSE
)
1792 return EXEC_ASYNC_END_STEPPING_RANGE
;
1794 return EXEC_ASYNC_FUNCTION_FINISHED
;
1797 /* finish_backward -- helper function for finish_command. */
1800 finish_backward (struct finish_command_fsm
*sm
)
1802 struct symtab_and_line sal
;
1803 struct thread_info
*tp
= inferior_thread ();
1805 CORE_ADDR func_addr
;
1807 pc
= get_frame_pc (get_current_frame ());
1809 if (find_pc_partial_function (pc
, NULL
, &func_addr
, NULL
) == 0)
1810 error (_("Cannot find bounds of current function"));
1812 sal
= find_pc_line (func_addr
, 0);
1814 tp
->control
.proceed_to_finish
= 1;
1815 /* Special case: if we're sitting at the function entry point,
1816 then all we need to do is take a reverse singlestep. We
1817 don't need to set a breakpoint, and indeed it would do us
1820 Note that this can only happen at frame #0, since there's
1821 no way that a function up the stack can have a return address
1822 that's equal to its entry point. */
1826 struct frame_info
*frame
= get_selected_frame (NULL
);
1827 struct gdbarch
*gdbarch
= get_frame_arch (frame
);
1829 /* Set a step-resume at the function's entry point. Once that's
1830 hit, we'll do one more step backwards. */
1831 symtab_and_line sr_sal
;
1833 sr_sal
.pspace
= get_frame_program_space (frame
);
1834 insert_step_resume_breakpoint_at_sal (gdbarch
,
1835 sr_sal
, null_frame_id
);
1837 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
1841 /* We're almost there -- we just need to back up by one more
1843 tp
->control
.step_range_start
= tp
->control
.step_range_end
= 1;
1844 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
1848 /* finish_forward -- helper function for finish_command. FRAME is the
1849 frame that called the function we're about to step out of. */
1852 finish_forward (struct finish_command_fsm
*sm
, struct frame_info
*frame
)
1854 struct frame_id frame_id
= get_frame_id (frame
);
1855 struct gdbarch
*gdbarch
= get_frame_arch (frame
);
1856 struct symtab_and_line sal
;
1857 struct thread_info
*tp
= inferior_thread ();
1859 sal
= find_pc_line (get_frame_pc (frame
), 0);
1860 sal
.pc
= get_frame_pc (frame
);
1862 sm
->breakpoint
= set_momentary_breakpoint (gdbarch
, sal
,
1863 get_stack_frame_id (frame
),
1866 /* set_momentary_breakpoint invalidates FRAME. */
1869 set_longjmp_breakpoint (tp
, frame_id
);
1871 /* We want to print return value, please... */
1872 tp
->control
.proceed_to_finish
= 1;
1874 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
1877 /* Skip frames for "finish". */
1879 static struct frame_info
*
1880 skip_finish_frames (struct frame_info
*frame
)
1882 struct frame_info
*start
;
1888 frame
= skip_tailcall_frames (frame
);
1892 frame
= skip_unwritable_frames (frame
);
1896 while (start
!= frame
);
1901 /* "finish": Set a temporary breakpoint at the place the selected
1902 frame will return to, then continue. */
1905 finish_command (const char *arg
, int from_tty
)
1907 struct frame_info
*frame
;
1909 struct finish_command_fsm
*sm
;
1910 struct thread_info
*tp
;
1913 ensure_not_tfind_mode ();
1914 ensure_valid_thread ();
1915 ensure_not_running ();
1917 /* Find out whether we must run in the background. */
1918 gdb::unique_xmalloc_ptr
<char> stripped
= strip_bg_char (arg
, &async_exec
);
1919 arg
= stripped
.get ();
1921 prepare_execution_command (current_top_target (), async_exec
);
1924 error (_("The \"finish\" command does not take any arguments."));
1926 frame
= get_prev_frame (get_selected_frame (_("No selected frame.")));
1928 error (_("\"finish\" not meaningful in the outermost frame."));
1930 clear_proceed_status (0);
1932 tp
= inferior_thread ();
1934 sm
= new finish_command_fsm (command_interp ());
1936 tp
->thread_fsm
= sm
;
1938 /* Finishing from an inline frame is completely different. We don't
1939 try to show the "return value" - no way to locate it. */
1940 if (get_frame_type (get_selected_frame (_("No selected frame.")))
1943 /* Claim we are stepping in the calling frame. An empty step
1944 range means that we will stop once we aren't in a function
1945 called by that frame. We don't use the magic "1" value for
1946 step_range_end, because then infrun will think this is nexti,
1947 and not step over the rest of this inlined function call. */
1948 set_step_info (frame
, {});
1949 tp
->control
.step_range_start
= get_frame_pc (frame
);
1950 tp
->control
.step_range_end
= tp
->control
.step_range_start
;
1951 tp
->control
.step_over_calls
= STEP_OVER_ALL
;
1953 /* Print info on the selected frame, including level number but not
1957 printf_filtered (_("Run till exit from "));
1958 print_stack_frame (get_selected_frame (NULL
), 1, LOCATION
, 0);
1961 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
1965 /* Find the function we will return from. */
1967 sm
->function
= find_pc_function (get_frame_pc (get_selected_frame (NULL
)));
1969 /* Print info on the selected frame, including level number but not
1973 if (execution_direction
== EXEC_REVERSE
)
1974 printf_filtered (_("Run back to call of "));
1977 if (sm
->function
!= NULL
&& TYPE_NO_RETURN (sm
->function
->type
)
1978 && !query (_("warning: Function %s does not return normally.\n"
1979 "Try to finish anyway? "),
1980 sm
->function
->print_name ()))
1981 error (_("Not confirmed."));
1982 printf_filtered (_("Run till exit from "));
1985 print_stack_frame (get_selected_frame (NULL
), 1, LOCATION
, 0);
1988 if (execution_direction
== EXEC_REVERSE
)
1989 finish_backward (sm
);
1992 frame
= skip_finish_frames (frame
);
1995 error (_("Cannot find the caller frame."));
1997 finish_forward (sm
, frame
);
2003 info_program_command (const char *args
, int from_tty
)
2008 process_stratum_target
*proc_target
;
2010 if (!target_has_execution
)
2012 printf_filtered (_("The program being debugged is not being run.\n"));
2018 ptid
= inferior_ptid
;
2019 proc_target
= current_inferior ()->process_target ();
2022 get_last_target_status (&proc_target
, &ptid
, nullptr);
2024 if (ptid
== null_ptid
|| ptid
== minus_one_ptid
)
2025 error (_("No selected thread."));
2027 thread_info
*tp
= find_thread_ptid (proc_target
, ptid
);
2029 if (tp
->state
== THREAD_EXITED
)
2030 error (_("Invalid selected thread."));
2031 else if (tp
->state
== THREAD_RUNNING
)
2032 error (_("Selected thread is running."));
2034 bs
= tp
->control
.stop_bpstat
;
2035 stat
= bpstat_num (&bs
, &num
);
2037 target_files_info ();
2038 printf_filtered (_("Program stopped at %s.\n"),
2039 paddress (target_gdbarch (), tp
->suspend
.stop_pc
));
2040 if (tp
->control
.stop_step
)
2041 printf_filtered (_("It stopped after being stepped.\n"));
2044 /* There may be several breakpoints in the same place, so this
2045 isn't as strange as it seems. */
2050 printf_filtered (_("It stopped at a breakpoint "
2051 "that has since been deleted.\n"));
2054 printf_filtered (_("It stopped at breakpoint %d.\n"), num
);
2055 stat
= bpstat_num (&bs
, &num
);
2058 else if (tp
->suspend
.stop_signal
!= GDB_SIGNAL_0
)
2060 printf_filtered (_("It stopped with signal %s, %s.\n"),
2061 gdb_signal_to_name (tp
->suspend
.stop_signal
),
2062 gdb_signal_to_string (tp
->suspend
.stop_signal
));
2067 printf_filtered (_("Type \"info stack\" or \"info "
2068 "registers\" for more information.\n"));
2073 environment_info (const char *var
, int from_tty
)
2077 const char *val
= current_inferior ()->environment
.get (var
);
2081 puts_filtered (var
);
2082 puts_filtered (" = ");
2083 puts_filtered (val
);
2084 puts_filtered ("\n");
2088 puts_filtered ("Environment variable \"");
2089 puts_filtered (var
);
2090 puts_filtered ("\" not defined.\n");
2095 char **envp
= current_inferior ()->environment
.envp ();
2097 for (int idx
= 0; envp
[idx
] != NULL
; ++idx
)
2099 puts_filtered (envp
[idx
]);
2100 puts_filtered ("\n");
2106 set_environment_command (const char *arg
, int from_tty
)
2108 const char *p
, *val
;
2112 error_no_arg (_("environment variable and value"));
2114 /* Find separation between variable name and value. */
2115 p
= (char *) strchr (arg
, '=');
2116 val
= (char *) strchr (arg
, ' ');
2118 if (p
!= 0 && val
!= 0)
2120 /* We have both a space and an equals. If the space is before the
2121 equals, walk forward over the spaces til we see a nonspace
2122 (possibly the equals). */
2127 /* Now if the = is after the char following the spaces,
2128 take the char following the spaces. */
2132 else if (val
!= 0 && p
== 0)
2136 error_no_arg (_("environment variable to set"));
2138 if (p
== 0 || p
[1] == 0)
2142 p
= arg
+ strlen (arg
); /* So that savestring below will work. */
2146 /* Not setting variable value to null. */
2148 while (*val
== ' ' || *val
== '\t')
2152 while (p
!= arg
&& (p
[-1] == ' ' || p
[-1] == '\t'))
2155 std::string
var (arg
, p
- arg
);
2158 printf_filtered (_("Setting environment variable "
2159 "\"%s\" to null value.\n"),
2161 current_inferior ()->environment
.set (var
.c_str (), "");
2164 current_inferior ()->environment
.set (var
.c_str (), val
);
2168 unset_environment_command (const char *var
, int from_tty
)
2172 /* If there is no argument, delete all environment variables.
2173 Ask for confirmation if reading from the terminal. */
2174 if (!from_tty
|| query (_("Delete all environment variables? ")))
2175 current_inferior ()->environment
.clear ();
2178 current_inferior ()->environment
.unset (var
);
2181 /* Handle the execution path (PATH variable). */
2183 static const char path_var_name
[] = "PATH";
2186 path_info (const char *args
, int from_tty
)
2188 puts_filtered ("Executable and object file path: ");
2189 puts_filtered (current_inferior ()->environment
.get (path_var_name
));
2190 puts_filtered ("\n");
2193 /* Add zero or more directories to the front of the execution path. */
2196 path_command (const char *dirname
, int from_tty
)
2202 env
= current_inferior ()->environment
.get (path_var_name
);
2203 /* Can be null if path is not set. */
2206 exec_path
= xstrdup (env
);
2207 mod_path (dirname
, &exec_path
);
2208 current_inferior ()->environment
.set (path_var_name
, exec_path
);
2211 path_info (NULL
, from_tty
);
2216 pad_to_column (string_file
&stream
, int col
)
2218 /* At least one space must be printed to separate columns. */
2220 const int size
= stream
.size ();
2222 stream
.puts (n_spaces (col
- size
));
2225 /* Print out the register NAME with value VAL, to FILE, in the default
2229 default_print_one_register_info (struct ui_file
*file
,
2233 struct type
*regtype
= value_type (val
);
2234 int print_raw_format
;
2235 string_file format_stream
;
2238 value_column_1
= 15,
2239 /* Give enough room for "0x", 16 hex digits and two spaces in
2240 preceding column. */
2241 value_column_2
= value_column_1
+ 2 + 16 + 2,
2244 format_stream
.puts (name
);
2245 pad_to_column (format_stream
, value_column_1
);
2247 print_raw_format
= (value_entirely_available (val
)
2248 && !value_optimized_out (val
));
2250 /* If virtual format is floating, print it that way, and in raw
2252 if (TYPE_CODE (regtype
) == TYPE_CODE_FLT
2253 || TYPE_CODE (regtype
) == TYPE_CODE_DECFLOAT
)
2255 struct value_print_options opts
;
2256 const gdb_byte
*valaddr
= value_contents_for_printing (val
);
2257 enum bfd_endian byte_order
= type_byte_order (regtype
);
2259 get_user_print_options (&opts
);
2263 value_embedded_offset (val
), 0,
2264 &format_stream
, 0, val
, &opts
, current_language
);
2266 if (print_raw_format
)
2268 pad_to_column (format_stream
, value_column_2
);
2269 format_stream
.puts ("(raw ");
2270 print_hex_chars (&format_stream
, valaddr
, TYPE_LENGTH (regtype
),
2272 format_stream
.putc (')');
2277 struct value_print_options opts
;
2279 /* Print the register in hex. */
2280 get_formatted_print_options (&opts
, 'x');
2283 value_embedded_offset (val
), 0,
2284 &format_stream
, 0, val
, &opts
, current_language
);
2285 /* If not a vector register, print it also according to its
2287 if (print_raw_format
&& TYPE_VECTOR (regtype
) == 0)
2289 pad_to_column (format_stream
, value_column_2
);
2290 get_user_print_options (&opts
);
2293 value_embedded_offset (val
), 0,
2294 &format_stream
, 0, val
, &opts
, current_language
);
2298 fputs_filtered (format_stream
.c_str (), file
);
2299 fprintf_filtered (file
, "\n");
2302 /* Print out the machine register regnum. If regnum is -1, print all
2303 registers (print_all == 1) or all non-float and non-vector
2304 registers (print_all == 0).
2306 For most machines, having all_registers_info() print the
2307 register(s) one per line is good enough. If a different format is
2308 required, (eg, for MIPS or Pyramid 90x, which both have lots of
2309 regs), or there is an existing convention for showing all the
2310 registers, define the architecture method PRINT_REGISTERS_INFO to
2311 provide that format. */
2314 default_print_registers_info (struct gdbarch
*gdbarch
,
2315 struct ui_file
*file
,
2316 struct frame_info
*frame
,
2317 int regnum
, int print_all
)
2320 const int numregs
= gdbarch_num_cooked_regs (gdbarch
);
2322 for (i
= 0; i
< numregs
; i
++)
2324 /* Decide between printing all regs, non-float / vector regs, or
2330 if (!gdbarch_register_reggroup_p (gdbarch
, i
, all_reggroup
))
2335 if (!gdbarch_register_reggroup_p (gdbarch
, i
, general_reggroup
))
2345 /* If the register name is empty, it is undefined for this
2346 processor, so don't display anything. */
2347 if (gdbarch_register_name (gdbarch
, i
) == NULL
2348 || *(gdbarch_register_name (gdbarch
, i
)) == '\0')
2351 default_print_one_register_info (file
,
2352 gdbarch_register_name (gdbarch
, i
),
2353 value_of_register (i
, frame
));
2358 registers_info (const char *addr_exp
, int fpregs
)
2360 struct frame_info
*frame
;
2361 struct gdbarch
*gdbarch
;
2363 if (!target_has_registers
)
2364 error (_("The program has no registers now."));
2365 frame
= get_selected_frame (NULL
);
2366 gdbarch
= get_frame_arch (frame
);
2370 gdbarch_print_registers_info (gdbarch
, gdb_stdout
,
2375 while (*addr_exp
!= '\0')
2380 /* Skip leading white space. */
2381 addr_exp
= skip_spaces (addr_exp
);
2383 /* Discard any leading ``$''. Check that there is something
2384 resembling a register following it. */
2385 if (addr_exp
[0] == '$')
2387 if (isspace ((*addr_exp
)) || (*addr_exp
) == '\0')
2388 error (_("Missing register name"));
2390 /* Find the start/end of this register name/num/group. */
2392 while ((*addr_exp
) != '\0' && !isspace ((*addr_exp
)))
2396 /* Figure out what we've found and display it. */
2398 /* A register name? */
2400 int regnum
= user_reg_map_name_to_regnum (gdbarch
, start
, end
- start
);
2404 /* User registers lie completely outside of the range of
2405 normal registers. Catch them early so that the target
2407 if (regnum
>= gdbarch_num_cooked_regs (gdbarch
))
2409 struct value
*regval
= value_of_user_reg (regnum
, frame
);
2410 const char *regname
= user_reg_map_regnum_to_name (gdbarch
,
2413 /* Print in the same fashion
2414 gdbarch_print_registers_info's default
2415 implementation prints. */
2416 default_print_one_register_info (gdb_stdout
,
2421 gdbarch_print_registers_info (gdbarch
, gdb_stdout
,
2422 frame
, regnum
, fpregs
);
2427 /* A register group? */
2429 struct reggroup
*group
;
2431 for (group
= reggroup_next (gdbarch
, NULL
);
2433 group
= reggroup_next (gdbarch
, group
))
2435 /* Don't bother with a length check. Should the user
2436 enter a short register group name, go with the first
2437 group that matches. */
2438 if (strncmp (start
, reggroup_name (group
), end
- start
) == 0)
2446 regnum
< gdbarch_num_cooked_regs (gdbarch
);
2449 if (gdbarch_register_reggroup_p (gdbarch
, regnum
, group
))
2450 gdbarch_print_registers_info (gdbarch
,
2458 /* Nothing matched. */
2459 error (_("Invalid register `%.*s'"), (int) (end
- start
), start
);
2464 info_all_registers_command (const char *addr_exp
, int from_tty
)
2466 registers_info (addr_exp
, 1);
2470 info_registers_command (const char *addr_exp
, int from_tty
)
2472 registers_info (addr_exp
, 0);
2476 print_vector_info (struct ui_file
*file
,
2477 struct frame_info
*frame
, const char *args
)
2479 struct gdbarch
*gdbarch
= get_frame_arch (frame
);
2481 if (gdbarch_print_vector_info_p (gdbarch
))
2482 gdbarch_print_vector_info (gdbarch
, file
, frame
, args
);
2486 int printed_something
= 0;
2488 for (regnum
= 0; regnum
< gdbarch_num_cooked_regs (gdbarch
); regnum
++)
2490 if (gdbarch_register_reggroup_p (gdbarch
, regnum
, vector_reggroup
))
2492 printed_something
= 1;
2493 gdbarch_print_registers_info (gdbarch
, file
, frame
, regnum
, 1);
2496 if (!printed_something
)
2497 fprintf_filtered (file
, "No vector information\n");
2502 info_vector_command (const char *args
, int from_tty
)
2504 if (!target_has_registers
)
2505 error (_("The program has no registers now."));
2507 print_vector_info (gdb_stdout
, get_selected_frame (NULL
), args
);
2510 /* Kill the inferior process. Make us have no inferior. */
2513 kill_command (const char *arg
, int from_tty
)
2515 /* FIXME: This should not really be inferior_ptid (or target_has_execution).
2516 It should be a distinct flag that indicates that a target is active, cuz
2517 some targets don't have processes! */
2519 if (inferior_ptid
== null_ptid
)
2520 error (_("The program is not being run."));
2521 if (!query (_("Kill the program being debugged? ")))
2522 error (_("Not confirmed."));
2524 int pid
= current_inferior ()->pid
;
2525 /* Save the pid as a string before killing the inferior, since that
2526 may unpush the current target, and we need the string after. */
2527 std::string pid_str
= target_pid_to_str (ptid_t (pid
));
2528 int infnum
= current_inferior ()->num
;
2532 if (print_inferior_events
)
2533 printf_unfiltered (_("[Inferior %d (%s) killed]\n"),
2534 infnum
, pid_str
.c_str ());
2536 bfd_cache_close_all ();
2539 /* Used in `attach&' command. Proceed threads of inferior INF iff
2540 they stopped due to debugger request, and when they did, they
2541 reported a clean stop (GDB_SIGNAL_0). Do not proceed threads that
2542 have been explicitly been told to stop. */
2545 proceed_after_attach (inferior
*inf
)
2547 /* Don't error out if the current thread is running, because
2548 there may be other stopped threads. */
2550 /* Backup current thread and selected frame. */
2551 scoped_restore_current_thread restore_thread
;
2553 for (thread_info
*thread
: inf
->non_exited_threads ())
2554 if (!thread
->executing
2555 && !thread
->stop_requested
2556 && thread
->suspend
.stop_signal
== GDB_SIGNAL_0
)
2558 switch_to_thread (thread
);
2559 clear_proceed_status (0);
2560 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
2564 /* See inferior.h. */
2567 setup_inferior (int from_tty
)
2569 struct inferior
*inferior
;
2571 inferior
= current_inferior ();
2572 inferior
->needs_setup
= 0;
2574 /* If no exec file is yet known, try to determine it from the
2576 if (get_exec_file (0) == NULL
)
2577 exec_file_locate_attach (inferior_ptid
.pid (), 1, from_tty
);
2580 reopen_exec_file ();
2584 /* Take any necessary post-attaching actions for this platform. */
2585 target_post_attach (inferior_ptid
.pid ());
2587 post_create_inferior (current_top_target (), from_tty
);
2590 /* What to do after the first program stops after attaching. */
2591 enum attach_post_wait_mode
2593 /* Do nothing. Leaves threads as they are. */
2594 ATTACH_POST_WAIT_NOTHING
,
2596 /* Re-resume threads that are marked running. */
2597 ATTACH_POST_WAIT_RESUME
,
2599 /* Stop all threads. */
2600 ATTACH_POST_WAIT_STOP
,
2603 /* Called after we've attached to a process and we've seen it stop for
2604 the first time. If ASYNC_EXEC is true, re-resume threads that
2605 should be running. Else if ATTACH, */
2608 attach_post_wait (const char *args
, int from_tty
, enum attach_post_wait_mode mode
)
2610 struct inferior
*inferior
;
2612 inferior
= current_inferior ();
2613 inferior
->control
.stop_soon
= NO_STOP_QUIETLY
;
2615 if (inferior
->needs_setup
)
2616 setup_inferior (from_tty
);
2618 if (mode
== ATTACH_POST_WAIT_RESUME
)
2620 /* The user requested an `attach&', so be sure to leave threads
2621 that didn't get a signal running. */
2623 /* Immediatelly resume all suspended threads of this inferior,
2624 and this inferior only. This should have no effect on
2625 already running threads. If a thread has been stopped with a
2626 signal, leave it be. */
2628 proceed_after_attach (inferior
);
2631 if (inferior_thread ()->suspend
.stop_signal
== GDB_SIGNAL_0
)
2633 clear_proceed_status (0);
2634 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
2638 else if (mode
== ATTACH_POST_WAIT_STOP
)
2640 /* The user requested a plain `attach', so be sure to leave
2641 the inferior stopped. */
2643 /* At least the current thread is already stopped. */
2645 /* In all-stop, by definition, all threads have to be already
2646 stopped at this point. In non-stop, however, although the
2647 selected thread is stopped, others may still be executing.
2648 Be sure to explicitly stop all threads of the process. This
2649 should have no effect on already stopped threads. */
2651 target_stop (ptid_t (inferior
->pid
));
2652 else if (target_is_non_stop_p ())
2654 struct thread_info
*lowest
= inferior_thread ();
2656 stop_all_threads ();
2658 /* It's not defined which thread will report the attach
2659 stop. For consistency, always select the thread with
2660 lowest GDB number, which should be the main thread, if it
2662 for (thread_info
*thread
: current_inferior ()->non_exited_threads ())
2663 if (thread
->inf
->num
< lowest
->inf
->num
2664 || thread
->per_inf_num
< lowest
->per_inf_num
)
2667 switch_to_thread (lowest
);
2670 /* Tell the user/frontend where we're stopped. */
2672 if (deprecated_attach_hook
)
2673 deprecated_attach_hook ();
2677 struct attach_command_continuation_args
2681 enum attach_post_wait_mode mode
;
2685 attach_command_continuation (void *args
, int err
)
2687 struct attach_command_continuation_args
*a
2688 = (struct attach_command_continuation_args
*) args
;
2693 attach_post_wait (a
->args
, a
->from_tty
, a
->mode
);
2697 attach_command_continuation_free_args (void *args
)
2699 struct attach_command_continuation_args
*a
2700 = (struct attach_command_continuation_args
*) args
;
2706 /* "attach" command entry point. Takes a program started up outside
2707 of gdb and ``attaches'' to it. This stops it cold in its tracks
2708 and allows us to start debugging it. */
2711 attach_command (const char *args
, int from_tty
)
2714 struct target_ops
*attach_target
;
2715 struct inferior
*inferior
= current_inferior ();
2716 enum attach_post_wait_mode mode
;
2718 dont_repeat (); /* Not for the faint of heart */
2720 if (gdbarch_has_global_solist (target_gdbarch ()))
2721 /* Don't complain if all processes share the same symbol
2724 else if (target_has_execution
)
2726 if (query (_("A program is being debugged already. Kill it? ")))
2729 error (_("Not killed."));
2732 /* Clean up any leftovers from other runs. Some other things from
2733 this function should probably be moved into target_pre_inferior. */
2734 target_pre_inferior (from_tty
);
2736 gdb::unique_xmalloc_ptr
<char> stripped
= strip_bg_char (args
, &async_exec
);
2737 args
= stripped
.get ();
2739 attach_target
= find_attach_target ();
2741 prepare_execution_command (attach_target
, async_exec
);
2743 if (non_stop
&& !attach_target
->supports_non_stop ())
2744 error (_("Cannot attach to this target in non-stop mode"));
2746 attach_target
->attach (args
, from_tty
);
2747 /* to_attach should push the target, so after this point we
2748 shouldn't refer to attach_target again. */
2749 attach_target
= NULL
;
2751 /* Set up the "saved terminal modes" of the inferior
2752 based on what modes we are starting it with. */
2753 target_terminal::init ();
2755 /* Install inferior's terminal modes. This may look like a no-op,
2756 as we've just saved them above, however, this does more than
2757 restore terminal settings:
2759 - installs a SIGINT handler that forwards SIGINT to the inferior.
2760 Otherwise a Ctrl-C pressed just while waiting for the initial
2761 stop would end up as a spurious Quit.
2763 - removes stdin from the event loop, which we need if attaching
2764 in the foreground, otherwise on targets that report an initial
2765 stop on attach (which are most) we'd process input/commands
2766 while we're in the event loop waiting for that stop. That is,
2767 before the attach continuation runs and the command is really
2769 target_terminal::inferior ();
2771 /* Set up execution context to know that we should return from
2772 wait_for_inferior as soon as the target reports a stop. */
2773 init_wait_for_inferior ();
2774 clear_proceed_status (0);
2776 inferior
->needs_setup
= 1;
2778 if (target_is_non_stop_p ())
2780 /* If we find that the current thread isn't stopped, explicitly
2781 do so now, because we're going to install breakpoints and
2785 /* The user requested an `attach&'; stop just one thread. */
2786 target_stop (inferior_ptid
);
2788 /* The user requested an `attach', so stop all threads of this
2790 target_stop (ptid_t (inferior_ptid
.pid ()));
2793 /* Check for exec file mismatch, and let the user solve it. */
2794 validate_exec_file (from_tty
);
2796 mode
= async_exec
? ATTACH_POST_WAIT_RESUME
: ATTACH_POST_WAIT_STOP
;
2798 /* Some system don't generate traps when attaching to inferior.
2799 E.g. Mach 3 or GNU hurd. */
2800 if (!target_attach_no_wait ())
2802 struct attach_command_continuation_args
*a
;
2804 /* Careful here. See comments in inferior.h. Basically some
2805 OSes don't ignore SIGSTOPs on continue requests anymore. We
2806 need a way for handle_inferior_event to reset the stop_signal
2807 variable after an attach, and this is what
2808 STOP_QUIETLY_NO_SIGSTOP is for. */
2809 inferior
->control
.stop_soon
= STOP_QUIETLY_NO_SIGSTOP
;
2811 /* Wait for stop. */
2812 a
= XNEW (struct attach_command_continuation_args
);
2813 a
->args
= xstrdup (args
);
2814 a
->from_tty
= from_tty
;
2816 add_inferior_continuation (attach_command_continuation
, a
,
2817 attach_command_continuation_free_args
);
2819 /* Let infrun consider waiting for events out of this
2821 inferior
->process_target ()->threads_executing
= true;
2823 if (!target_is_async_p ())
2824 mark_infrun_async_event_handler ();
2828 attach_post_wait (args
, from_tty
, mode
);
2831 /* We had just found out that the target was already attached to an
2832 inferior. PTID points at a thread of this new inferior, that is
2833 the most likely to be stopped right now, but not necessarily so.
2834 The new inferior is assumed to be already added to the inferior
2835 list at this point. If LEAVE_RUNNING, then leave the threads of
2836 this inferior running, except those we've explicitly seen reported
2840 notice_new_inferior (thread_info
*thr
, int leave_running
, int from_tty
)
2842 enum attach_post_wait_mode mode
2843 = leave_running
? ATTACH_POST_WAIT_RESUME
: ATTACH_POST_WAIT_NOTHING
;
2845 gdb::optional
<scoped_restore_current_thread
> restore_thread
;
2847 if (inferior_ptid
!= null_ptid
)
2848 restore_thread
.emplace ();
2850 /* Avoid reading registers -- we haven't fetched the target
2852 switch_to_thread_no_regs (thr
);
2854 /* When we "notice" a new inferior we need to do all the things we
2855 would normally do if we had just attached to it. */
2859 struct attach_command_continuation_args
*a
;
2860 struct inferior
*inferior
= current_inferior ();
2862 /* We're going to install breakpoints, and poke at memory,
2863 ensure that the inferior is stopped for a moment while we do
2865 target_stop (inferior_ptid
);
2867 inferior
->control
.stop_soon
= STOP_QUIETLY_REMOTE
;
2869 /* Wait for stop before proceeding. */
2870 a
= XNEW (struct attach_command_continuation_args
);
2871 a
->args
= xstrdup ("");
2872 a
->from_tty
= from_tty
;
2874 add_inferior_continuation (attach_command_continuation
, a
,
2875 attach_command_continuation_free_args
);
2880 attach_post_wait ("" /* args */, from_tty
, mode
);
2885 * takes a program previously attached to and detaches it.
2886 * The program resumes execution and will no longer stop
2887 * on signals, etc. We better not have left any breakpoints
2888 * in the program or it'll die when it hits one. For this
2889 * to work, it may be necessary for the process to have been
2890 * previously attached. It *might* work if the program was
2891 * started via the normal ptrace (PTRACE_TRACEME).
2895 detach_command (const char *args
, int from_tty
)
2897 dont_repeat (); /* Not for the faint of heart. */
2899 if (inferior_ptid
== null_ptid
)
2900 error (_("The program is not being run."));
2902 query_if_trace_running (from_tty
);
2904 disconnect_tracing ();
2906 target_detach (current_inferior (), from_tty
);
2908 /* The current inferior process was just detached successfully. Get
2909 rid of breakpoints that no longer make sense. Note we don't do
2910 this within target_detach because that is also used when
2911 following child forks, and in that case we will want to transfer
2912 breakpoints to the child, not delete them. */
2913 breakpoint_init_inferior (inf_exited
);
2915 /* If the solist is global across inferiors, don't clear it when we
2916 detach from a single inferior. */
2917 if (!gdbarch_has_global_solist (target_gdbarch ()))
2918 no_shared_libraries (NULL
, from_tty
);
2920 if (deprecated_detach_hook
)
2921 deprecated_detach_hook ();
2924 /* Disconnect from the current target without resuming it (leaving it
2925 waiting for a debugger).
2927 We'd better not have left any breakpoints in the program or the
2928 next debugger will get confused. Currently only supported for some
2929 remote targets, since the normal attach mechanisms don't work on
2930 stopped processes on some native platforms (e.g. GNU/Linux). */
2933 disconnect_command (const char *args
, int from_tty
)
2935 dont_repeat (); /* Not for the faint of heart. */
2936 query_if_trace_running (from_tty
);
2937 disconnect_tracing ();
2938 target_disconnect (args
, from_tty
);
2939 no_shared_libraries (NULL
, from_tty
);
2940 init_thread_list ();
2941 if (deprecated_detach_hook
)
2942 deprecated_detach_hook ();
2945 /* Stop PTID in the current target, and tag the PTID threads as having
2946 been explicitly requested to stop. PTID can be a thread, a
2947 process, or minus_one_ptid, meaning all threads of all inferiors of
2948 the current target. */
2951 stop_current_target_threads_ns (ptid_t ptid
)
2955 /* Tag the thread as having been explicitly requested to stop, so
2956 other parts of gdb know not to resume this thread automatically,
2957 if it was stopped due to an internal event. Limit this to
2958 non-stop mode, as when debugging a multi-threaded application in
2959 all-stop mode, we will only get one stop event --- it's undefined
2960 which thread will report the event. */
2961 set_stop_requested (current_inferior ()->process_target (),
2965 /* See inferior.h. */
2968 interrupt_target_1 (bool all_threads
)
2974 scoped_restore_current_thread restore_thread
;
2976 for (inferior
*inf
: all_inferiors ())
2978 switch_to_inferior_no_thread (inf
);
2979 stop_current_target_threads_ns (minus_one_ptid
);
2983 stop_current_target_threads_ns (inferior_ptid
);
2986 target_interrupt ();
2990 Stop the execution of the target while running in async mode, in
2991 the background. In all-stop, stop the whole process. In non-stop
2992 mode, stop the current thread only by default, or stop all threads
2993 if the `-a' switch is used. */
2996 interrupt_command (const char *args
, int from_tty
)
2998 if (target_can_async_p ())
3000 int all_threads
= 0;
3002 dont_repeat (); /* Not for the faint of heart. */
3005 && startswith (args
, "-a"))
3008 if (!non_stop
&& all_threads
)
3009 error (_("-a is meaningless in all-stop mode."));
3011 interrupt_target_1 (all_threads
);
3015 /* See inferior.h. */
3018 default_print_float_info (struct gdbarch
*gdbarch
, struct ui_file
*file
,
3019 struct frame_info
*frame
, const char *args
)
3022 int printed_something
= 0;
3024 for (regnum
= 0; regnum
< gdbarch_num_cooked_regs (gdbarch
); regnum
++)
3026 if (gdbarch_register_reggroup_p (gdbarch
, regnum
, float_reggroup
))
3028 printed_something
= 1;
3029 gdbarch_print_registers_info (gdbarch
, file
, frame
, regnum
, 1);
3032 if (!printed_something
)
3033 fprintf_filtered (file
, "No floating-point info "
3034 "available for this processor.\n");
3038 info_float_command (const char *args
, int from_tty
)
3040 struct frame_info
*frame
;
3042 if (!target_has_registers
)
3043 error (_("The program has no registers now."));
3045 frame
= get_selected_frame (NULL
);
3046 gdbarch_print_float_info (get_frame_arch (frame
), gdb_stdout
, frame
, args
);
3050 unset_command (const char *args
, int from_tty
)
3052 printf_filtered (_("\"unset\" must be followed by the "
3053 "name of an unset subcommand.\n"));
3054 help_list (unsetlist
, "unset ", all_commands
, gdb_stdout
);
3057 /* Implement `info proc' family of commands. */
3060 info_proc_cmd_1 (const char *args
, enum info_proc_what what
, int from_tty
)
3062 struct gdbarch
*gdbarch
= get_current_arch ();
3064 if (!target_info_proc (args
, what
))
3066 if (gdbarch_info_proc_p (gdbarch
))
3067 gdbarch_info_proc (gdbarch
, args
, what
);
3069 error (_("Not supported on this target."));
3073 /* Implement `info proc' when given without any further parameters. */
3076 info_proc_cmd (const char *args
, int from_tty
)
3078 info_proc_cmd_1 (args
, IP_MINIMAL
, from_tty
);
3081 /* Implement `info proc mappings'. */
3084 info_proc_cmd_mappings (const char *args
, int from_tty
)
3086 info_proc_cmd_1 (args
, IP_MAPPINGS
, from_tty
);
3089 /* Implement `info proc stat'. */
3092 info_proc_cmd_stat (const char *args
, int from_tty
)
3094 info_proc_cmd_1 (args
, IP_STAT
, from_tty
);
3097 /* Implement `info proc status'. */
3100 info_proc_cmd_status (const char *args
, int from_tty
)
3102 info_proc_cmd_1 (args
, IP_STATUS
, from_tty
);
3105 /* Implement `info proc cwd'. */
3108 info_proc_cmd_cwd (const char *args
, int from_tty
)
3110 info_proc_cmd_1 (args
, IP_CWD
, from_tty
);
3113 /* Implement `info proc cmdline'. */
3116 info_proc_cmd_cmdline (const char *args
, int from_tty
)
3118 info_proc_cmd_1 (args
, IP_CMDLINE
, from_tty
);
3121 /* Implement `info proc exe'. */
3124 info_proc_cmd_exe (const char *args
, int from_tty
)
3126 info_proc_cmd_1 (args
, IP_EXE
, from_tty
);
3129 /* Implement `info proc files'. */
3132 info_proc_cmd_files (const char *args
, int from_tty
)
3134 info_proc_cmd_1 (args
, IP_FILES
, from_tty
);
3137 /* Implement `info proc all'. */
3140 info_proc_cmd_all (const char *args
, int from_tty
)
3142 info_proc_cmd_1 (args
, IP_ALL
, from_tty
);
3145 /* Implement `show print finish'. */
3148 show_print_finish (struct ui_file
*file
, int from_tty
,
3149 struct cmd_list_element
*c
,
3152 fprintf_filtered (file
, _("\
3153 Printing of return value after `finish' is %s.\n"),
3158 /* This help string is used for the run, start, and starti commands.
3159 It is defined as a macro to prevent duplication. */
3161 #define RUN_ARGS_HELP \
3162 "You may specify arguments to give it.\n\
3163 Args may include \"*\", or \"[...]\"; they are expanded using the\n\
3164 shell that will start the program (specified by the \"$SHELL\" environment\n\
3165 variable). Input and output redirection with \">\", \"<\", or \">>\"\n\
3166 are also allowed.\n\
3168 With no arguments, uses arguments last specified (with \"run\" or \n\
3169 \"set args\"). To cancel previous arguments and run with no arguments,\n\
3170 use \"set args\" without arguments.\n\
3172 To start the inferior without using a shell, use \"set startup-with-shell off\"."
3174 void _initialize_infcmd ();
3176 _initialize_infcmd ()
3178 static struct cmd_list_element
*info_proc_cmdlist
;
3179 struct cmd_list_element
*c
= NULL
;
3180 const char *cmd_name
;
3182 /* Add the filename of the terminal connected to inferior I/O. */
3183 add_setshow_optional_filename_cmd ("inferior-tty", class_run
,
3184 &inferior_io_terminal_scratch
, _("\
3185 Set terminal for future runs of program being debugged."), _("\
3186 Show terminal for future runs of program being debugged."), _("\
3187 Usage: set inferior-tty [TTY]\n\n\
3188 If TTY is omitted, the default behavior of using the same terminal as GDB\n\
3190 set_inferior_tty_command
,
3191 show_inferior_tty_command
,
3192 &setlist
, &showlist
);
3193 cmd_name
= "inferior-tty";
3194 c
= lookup_cmd (&cmd_name
, setlist
, "", -1, 1);
3195 gdb_assert (c
!= NULL
);
3196 add_alias_cmd ("tty", c
, class_alias
, 0, &cmdlist
);
3199 add_setshow_string_noescape_cmd (cmd_name
, class_run
,
3200 &inferior_args_scratch
, _("\
3201 Set argument list to give program being debugged when it is started."), _("\
3202 Show argument list to give program being debugged when it is started."), _("\
3203 Follow this command with any number of args, to be passed to the program."),
3206 &setlist
, &showlist
);
3207 c
= lookup_cmd (&cmd_name
, setlist
, "", -1, 1);
3208 gdb_assert (c
!= NULL
);
3209 set_cmd_completer (c
, filename_completer
);
3212 add_setshow_string_noescape_cmd (cmd_name
, class_run
,
3213 &inferior_cwd_scratch
, _("\
3214 Set the current working directory to be used when the inferior is started.\n\
3215 Changing this setting does not have any effect on inferiors that are\n\
3218 Show the current working directory that is used when the inferior is started."),
3220 Use this command to change the current working directory that will be used\n\
3221 when the inferior is started. This setting does not affect GDB's current\n\
3222 working directory."),
3225 &setlist
, &showlist
);
3226 c
= lookup_cmd (&cmd_name
, setlist
, "", -1, 1);
3227 gdb_assert (c
!= NULL
);
3228 set_cmd_completer (c
, filename_completer
);
3230 c
= add_cmd ("environment", no_class
, environment_info
, _("\
3231 The environment to give the program, or one variable's value.\n\
3232 With an argument VAR, prints the value of environment variable VAR to\n\
3233 give the program being debugged. With no arguments, prints the entire\n\
3234 environment to be given to the program."), &showlist
);
3235 set_cmd_completer (c
, noop_completer
);
3237 add_prefix_cmd ("unset", no_class
, unset_command
,
3238 _("Complement to certain \"set\" commands."),
3239 &unsetlist
, "unset ", 0, &cmdlist
);
3241 c
= add_cmd ("environment", class_run
, unset_environment_command
, _("\
3242 Cancel environment variable VAR for the program.\n\
3243 This does not affect the program until the next \"run\" command."),
3245 set_cmd_completer (c
, noop_completer
);
3247 c
= add_cmd ("environment", class_run
, set_environment_command
, _("\
3248 Set environment variable value to give the program.\n\
3249 Arguments are VAR VALUE where VAR is variable name and VALUE is value.\n\
3250 VALUES of environment variables are uninterpreted strings.\n\
3251 This does not affect the program until the next \"run\" command."),
3253 set_cmd_completer (c
, noop_completer
);
3255 c
= add_com ("path", class_files
, path_command
, _("\
3256 Add directory DIR(s) to beginning of search path for object files.\n\
3257 $cwd in the path means the current working directory.\n\
3258 This path is equivalent to the $PATH shell variable. It is a list of\n\
3259 directories, separated by colons. These directories are searched to find\n\
3260 fully linked executable files and separately compiled object files as \
3262 set_cmd_completer (c
, filename_completer
);
3264 c
= add_cmd ("paths", no_class
, path_info
, _("\
3265 Current search path for finding object files.\n\
3266 $cwd in the path means the current working directory.\n\
3267 This path is equivalent to the $PATH shell variable. It is a list of\n\
3268 directories, separated by colons. These directories are searched to find\n\
3269 fully linked executable files and separately compiled object files as \
3272 set_cmd_completer (c
, noop_completer
);
3274 add_prefix_cmd ("kill", class_run
, kill_command
,
3275 _("Kill execution of program being debugged."),
3276 &killlist
, "kill ", 0, &cmdlist
);
3278 add_com ("attach", class_run
, attach_command
, _("\
3279 Attach to a process or file outside of GDB.\n\
3280 This command attaches to another target, of the same type as your last\n\
3281 \"target\" command (\"info files\" will show your target stack).\n\
3282 The command may take as argument a process id or a device file.\n\
3283 For a process id, you must have permission to send the process a signal,\n\
3284 and it must have the same effective uid as the debugger.\n\
3285 When using \"attach\" with a process id, the debugger finds the\n\
3286 program running in the process, looking first in the current working\n\
3287 directory, or (if not found there) using the source file search path\n\
3288 (see the \"directory\" command). You can also use the \"file\" command\n\
3289 to specify the program, and to load its symbol table."));
3291 add_prefix_cmd ("detach", class_run
, detach_command
, _("\
3292 Detach a process or file previously attached.\n\
3293 If a process, it is no longer traced, and it continues its execution. If\n\
3294 you were debugging a file, the file is closed and gdb no longer accesses it."),
3295 &detachlist
, "detach ", 0, &cmdlist
);
3297 add_com ("disconnect", class_run
, disconnect_command
, _("\
3298 Disconnect from a target.\n\
3299 The target will wait for another debugger to connect. Not available for\n\
3302 c
= add_com ("signal", class_run
, signal_command
, _("\
3303 Continue program with the specified signal.\n\
3304 Usage: signal SIGNAL\n\
3305 The SIGNAL argument is processed the same as the handle command.\n\
3307 An argument of \"0\" means continue the program without sending it a signal.\n\
3308 This is useful in cases where the program stopped because of a signal,\n\
3309 and you want to resume the program while discarding the signal.\n\
3311 In a multi-threaded program the signal is delivered to, or discarded from,\n\
3312 the current thread only."));
3313 set_cmd_completer (c
, signal_completer
);
3315 c
= add_com ("queue-signal", class_run
, queue_signal_command
, _("\
3316 Queue a signal to be delivered to the current thread when it is resumed.\n\
3317 Usage: queue-signal SIGNAL\n\
3318 The SIGNAL argument is processed the same as the handle command.\n\
3319 It is an error if the handling state of SIGNAL is \"nopass\".\n\
3321 An argument of \"0\" means remove any currently queued signal from\n\
3322 the current thread. This is useful in cases where the program stopped\n\
3323 because of a signal, and you want to resume it while discarding the signal.\n\
3325 In a multi-threaded program the signal is queued with, or discarded from,\n\
3326 the current thread only."));
3327 set_cmd_completer (c
, signal_completer
);
3329 add_com ("stepi", class_run
, stepi_command
, _("\
3330 Step one instruction exactly.\n\
3332 Argument N means step N times (or till program stops for another \
3334 add_com_alias ("si", "stepi", class_alias
, 0);
3336 add_com ("nexti", class_run
, nexti_command
, _("\
3337 Step one instruction, but proceed through subroutine calls.\n\
3339 Argument N means step N times (or till program stops for another \
3341 add_com_alias ("ni", "nexti", class_alias
, 0);
3343 add_com ("finish", class_run
, finish_command
, _("\
3344 Execute until selected stack frame returns.\n\
3346 Upon return, the value returned is printed and put in the value history."));
3347 add_com_alias ("fin", "finish", class_run
, 1);
3349 add_com ("next", class_run
, next_command
, _("\
3350 Step program, proceeding through subroutine calls.\n\
3352 Unlike \"step\", if the current source line calls a subroutine,\n\
3353 this command does not enter the subroutine, but instead steps over\n\
3354 the call, in effect treating it as a single source line."));
3355 add_com_alias ("n", "next", class_run
, 1);
3357 add_com ("step", class_run
, step_command
, _("\
3358 Step program until it reaches a different source line.\n\
3360 Argument N means step N times (or till program stops for another \
3362 add_com_alias ("s", "step", class_run
, 1);
3364 c
= add_com ("until", class_run
, until_command
, _("\
3365 Execute until past the current line or past a LOCATION.\n\
3366 Execute until the program reaches a source line greater than the current\n\
3367 or a specified location (same args as break command) within the current \
3369 set_cmd_completer (c
, location_completer
);
3370 add_com_alias ("u", "until", class_run
, 1);
3372 c
= add_com ("advance", class_run
, advance_command
, _("\
3373 Continue the program up to the given location (same form as args for break \
3375 Execution will also stop upon exit from the current stack frame."));
3376 set_cmd_completer (c
, location_completer
);
3378 c
= add_com ("jump", class_run
, jump_command
, _("\
3379 Continue program being debugged at specified line or address.\n\
3380 Usage: jump LOCATION\n\
3381 Give as argument either LINENUM or *ADDR, where ADDR is an expression\n\
3382 for an address to start at."));
3383 set_cmd_completer (c
, location_completer
);
3384 add_com_alias ("j", "jump", class_run
, 1);
3386 add_com ("continue", class_run
, continue_command
, _("\
3387 Continue program being debugged, after signal or breakpoint.\n\
3388 Usage: continue [N]\n\
3389 If proceeding from breakpoint, a number N may be used as an argument,\n\
3390 which means to set the ignore count of that breakpoint to N - 1 (so that\n\
3391 the breakpoint won't break until the Nth time it is reached).\n\
3393 If non-stop mode is enabled, continue only the current thread,\n\
3394 otherwise all the threads in the program are continued. To \n\
3395 continue all stopped threads in non-stop mode, use the -a option.\n\
3396 Specifying -a and an ignore count simultaneously is an error."));
3397 add_com_alias ("c", "cont", class_run
, 1);
3398 add_com_alias ("fg", "cont", class_run
, 1);
3400 c
= add_com ("run", class_run
, run_command
, _("\
3401 Start debugged program.\n"
3403 set_cmd_completer (c
, filename_completer
);
3404 add_com_alias ("r", "run", class_run
, 1);
3406 c
= add_com ("start", class_run
, start_command
, _("\
3407 Start the debugged program stopping at the beginning of the main procedure.\n"
3409 set_cmd_completer (c
, filename_completer
);
3411 c
= add_com ("starti", class_run
, starti_command
, _("\
3412 Start the debugged program stopping at the first instruction.\n"
3414 set_cmd_completer (c
, filename_completer
);
3416 add_com ("interrupt", class_run
, interrupt_command
,
3417 _("Interrupt the execution of the debugged program.\n\
3418 If non-stop mode is enabled, interrupt only the current thread,\n\
3419 otherwise all the threads in the program are stopped. To \n\
3420 interrupt all running threads in non-stop mode, use the -a option."));
3422 c
= add_info ("registers", info_registers_command
, _("\
3423 List of integer registers and their contents, for selected stack frame.\n\
3424 One or more register names as argument means describe the given registers.\n\
3425 One or more register group names as argument means describe the registers\n\
3426 in the named register groups."));
3427 add_info_alias ("r", "registers", 1);
3428 set_cmd_completer (c
, reg_or_group_completer
);
3430 c
= add_info ("all-registers", info_all_registers_command
, _("\
3431 List of all registers and their contents, for selected stack frame.\n\
3432 One or more register names as argument means describe the given registers.\n\
3433 One or more register group names as argument means describe the registers\n\
3434 in the named register groups."));
3435 set_cmd_completer (c
, reg_or_group_completer
);
3437 add_info ("program", info_program_command
,
3438 _("Execution status of the program."));
3440 add_info ("float", info_float_command
,
3441 _("Print the status of the floating point unit."));
3443 add_info ("vector", info_vector_command
,
3444 _("Print the status of the vector unit."));
3446 add_prefix_cmd ("proc", class_info
, info_proc_cmd
,
3448 Show additional information about a process.\n\
3449 Specify any process id, or use the program being debugged by default."),
3450 &info_proc_cmdlist
, "info proc ",
3451 1/*allow-unknown*/, &infolist
);
3453 add_cmd ("mappings", class_info
, info_proc_cmd_mappings
, _("\
3454 List memory regions mapped by the specified process."),
3455 &info_proc_cmdlist
);
3457 add_cmd ("stat", class_info
, info_proc_cmd_stat
, _("\
3458 List process info from /proc/PID/stat."),
3459 &info_proc_cmdlist
);
3461 add_cmd ("status", class_info
, info_proc_cmd_status
, _("\
3462 List process info from /proc/PID/status."),
3463 &info_proc_cmdlist
);
3465 add_cmd ("cwd", class_info
, info_proc_cmd_cwd
, _("\
3466 List current working directory of the specified process."),
3467 &info_proc_cmdlist
);
3469 add_cmd ("cmdline", class_info
, info_proc_cmd_cmdline
, _("\
3470 List command line arguments of the specified process."),
3471 &info_proc_cmdlist
);
3473 add_cmd ("exe", class_info
, info_proc_cmd_exe
, _("\
3474 List absolute filename for executable of the specified process."),
3475 &info_proc_cmdlist
);
3477 add_cmd ("files", class_info
, info_proc_cmd_files
, _("\
3478 List files opened by the specified process."),
3479 &info_proc_cmdlist
);
3481 add_cmd ("all", class_info
, info_proc_cmd_all
, _("\
3482 List all available info about the specified process."),
3483 &info_proc_cmdlist
);
3485 add_setshow_boolean_cmd ("finish", class_support
,
3486 &user_print_options
.finish_print
, _("\
3487 Set whether `finish' prints the return value."), _("\
3488 Show whether `finish' prints the return value."), NULL
,
3491 &setprintlist
, &showprintlist
);