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 in TP the starting point of a "step" or "next" command. */
920 set_step_frame (thread_info
*tp
)
922 /* This can be removed once this function no longer implicitly relies on the
923 inferior_ptid value. */
924 gdb_assert (inferior_ptid
== tp
->ptid
);
926 frame_info
*frame
= get_current_frame ();
928 symtab_and_line sal
= find_frame_sal (frame
);
929 set_step_info (tp
, frame
, sal
);
931 CORE_ADDR pc
= get_frame_pc (frame
);
932 tp
->control
.step_start_function
= find_pc_function (pc
);
935 /* Step until outside of current statement. */
938 step_command (const char *count_string
, int from_tty
)
940 step_1 (0, 0, count_string
);
943 /* Likewise, but skip over subroutine calls as if single instructions. */
946 next_command (const char *count_string
, int from_tty
)
948 step_1 (1, 0, count_string
);
951 /* Likewise, but step only one instruction. */
954 stepi_command (const char *count_string
, int from_tty
)
956 step_1 (0, 1, count_string
);
960 nexti_command (const char *count_string
, int from_tty
)
962 step_1 (1, 1, count_string
);
965 /* Data for the FSM that manages the step/next/stepi/nexti
968 struct step_command_fsm
: public thread_fsm
970 /* How many steps left in a "step N"-like command. */
973 /* If true, this is a next/nexti, otherwise a step/stepi. */
974 int skip_subroutines
;
976 /* If true, this is a stepi/nexti, otherwise a step/step. */
979 explicit step_command_fsm (struct interp
*cmd_interp
)
980 : thread_fsm (cmd_interp
)
984 void clean_up (struct thread_info
*thread
) override
;
985 bool should_stop (struct thread_info
*thread
) override
;
986 enum async_reply_reason
do_async_reply_reason () override
;
989 /* Prepare for a step/next/etc. command. Any target resource
990 allocated here is undone in the FSM's clean_up method. */
993 step_command_fsm_prepare (struct step_command_fsm
*sm
,
994 int skip_subroutines
, int single_inst
,
995 int count
, struct thread_info
*thread
)
997 sm
->skip_subroutines
= skip_subroutines
;
998 sm
->single_inst
= single_inst
;
1001 /* Leave the si command alone. */
1002 if (!sm
->single_inst
|| sm
->skip_subroutines
)
1003 set_longjmp_breakpoint (thread
, get_frame_id (get_current_frame ()));
1005 thread
->control
.stepping_command
= 1;
1008 static int prepare_one_step (thread_info
*, struct step_command_fsm
*sm
);
1011 step_1 (int skip_subroutines
, int single_inst
, const char *count_string
)
1015 struct thread_info
*thr
;
1016 struct step_command_fsm
*step_sm
;
1019 ensure_not_tfind_mode ();
1020 ensure_valid_thread ();
1021 ensure_not_running ();
1023 gdb::unique_xmalloc_ptr
<char> stripped
1024 = strip_bg_char (count_string
, &async_exec
);
1025 count_string
= stripped
.get ();
1027 prepare_execution_command (current_top_target (), async_exec
);
1029 count
= count_string
? parse_and_eval_long (count_string
) : 1;
1031 clear_proceed_status (1);
1033 /* Setup the execution command state machine to handle all the COUNT
1035 thr
= inferior_thread ();
1036 step_sm
= new step_command_fsm (command_interp ());
1037 thr
->thread_fsm
= step_sm
;
1039 step_command_fsm_prepare (step_sm
, skip_subroutines
,
1040 single_inst
, count
, thr
);
1042 /* Do only one step for now, before returning control to the event
1043 loop. Let the continuation figure out how many other steps we
1044 need to do, and handle them one at the time, through
1046 if (!prepare_one_step (thr
, step_sm
))
1047 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
1052 /* Stepped into an inline frame. Pretend that we've
1054 thr
->thread_fsm
->clean_up (thr
);
1055 proceeded
= normal_stop ();
1057 inferior_event_handler (INF_EXEC_COMPLETE
, NULL
);
1058 all_uis_check_sync_execution_done ();
1062 /* Implementation of the 'should_stop' FSM method for stepping
1063 commands. Called after we are done with one step operation, to
1064 check whether we need to step again, before we print the prompt and
1065 return control to the user. If count is > 1, returns false, as we
1066 will need to keep going. */
1069 step_command_fsm::should_stop (struct thread_info
*tp
)
1071 if (tp
->control
.stop_step
)
1073 /* There are more steps to make, and we did stop due to
1074 ending a stepping range. Do another step. */
1076 return prepare_one_step (tp
, this);
1084 /* Implementation of the 'clean_up' FSM method for stepping commands. */
1087 step_command_fsm::clean_up (struct thread_info
*thread
)
1089 if (!single_inst
|| skip_subroutines
)
1090 delete_longjmp_breakpoint (thread
->global_num
);
1093 /* Implementation of the 'async_reply_reason' FSM method for stepping
1096 enum async_reply_reason
1097 step_command_fsm::do_async_reply_reason ()
1099 return EXEC_ASYNC_END_STEPPING_RANGE
;
1102 /* Prepare for one step in "step N". The actual target resumption is
1103 done by the caller. Return true if we're done and should thus
1104 report a stop to the user. Returns false if the target needs to be
1108 prepare_one_step (thread_info
*tp
, struct step_command_fsm
*sm
)
1110 /* This can be removed once this function no longer implicitly relies on the
1111 inferior_ptid value. */
1112 gdb_assert (inferior_ptid
== tp
->ptid
);
1116 struct frame_info
*frame
= get_current_frame ();
1118 set_step_frame (tp
);
1120 if (!sm
->single_inst
)
1124 /* Step at an inlined function behaves like "down". */
1125 if (!sm
->skip_subroutines
1126 && inline_skipped_frames (tp
))
1129 const char *fn
= NULL
;
1130 symtab_and_line sal
;
1133 /* Pretend that we've ran. */
1134 resume_ptid
= user_visible_resume_ptid (1);
1135 set_running (tp
->inf
->process_target (), resume_ptid
, true);
1137 step_into_inline_frame (tp
);
1139 frame
= get_current_frame ();
1140 sal
= find_frame_sal (frame
);
1141 sym
= get_frame_function (frame
);
1144 fn
= sym
->print_name ();
1147 || !function_name_is_marked_for_skip (fn
, sal
))
1150 return prepare_one_step (tp
, sm
);
1154 pc
= get_frame_pc (frame
);
1155 find_pc_line_pc_range (pc
,
1156 &tp
->control
.step_range_start
,
1157 &tp
->control
.step_range_end
);
1159 tp
->control
.may_range_step
= 1;
1161 /* If we have no line info, switch to stepi mode. */
1162 if (tp
->control
.step_range_end
== 0 && step_stop_if_no_debug
)
1164 tp
->control
.step_range_start
= tp
->control
.step_range_end
= 1;
1165 tp
->control
.may_range_step
= 0;
1167 else if (tp
->control
.step_range_end
== 0)
1171 if (find_pc_partial_function (pc
, &name
,
1172 &tp
->control
.step_range_start
,
1173 &tp
->control
.step_range_end
) == 0)
1174 error (_("Cannot find bounds of current function"));
1176 target_terminal::ours_for_output ();
1177 printf_filtered (_("Single stepping until exit from function %s,"
1178 "\nwhich has no line number information.\n"),
1184 /* Say we are stepping, but stop after one insn whatever it does. */
1185 tp
->control
.step_range_start
= tp
->control
.step_range_end
= 1;
1186 if (!sm
->skip_subroutines
)
1188 Don't step over function calls, not even to functions lacking
1190 tp
->control
.step_over_calls
= STEP_OVER_NONE
;
1193 if (sm
->skip_subroutines
)
1194 tp
->control
.step_over_calls
= STEP_OVER_ALL
;
1200 sm
->set_finished ();
1205 /* Continue program at specified address. */
1208 jump_command (const char *arg
, int from_tty
)
1210 struct gdbarch
*gdbarch
= get_current_arch ();
1217 ensure_not_tfind_mode ();
1218 ensure_valid_thread ();
1219 ensure_not_running ();
1221 /* Find out whether we must run in the background. */
1222 gdb::unique_xmalloc_ptr
<char> stripped
= strip_bg_char (arg
, &async_exec
);
1223 arg
= stripped
.get ();
1225 prepare_execution_command (current_top_target (), async_exec
);
1228 error_no_arg (_("starting address"));
1230 std::vector
<symtab_and_line
> sals
1231 = decode_line_with_last_displayed (arg
, DECODE_LINE_FUNFIRSTLINE
);
1232 if (sals
.size () != 1)
1233 error (_("Unreasonable jump request"));
1235 symtab_and_line
&sal
= sals
[0];
1237 if (sal
.symtab
== 0 && sal
.pc
== 0)
1238 error (_("No source file has been specified."));
1240 resolve_sal_pc (&sal
); /* May error out. */
1242 /* See if we are trying to jump to another function. */
1243 fn
= get_frame_function (get_current_frame ());
1244 sfn
= find_pc_function (sal
.pc
);
1245 if (fn
!= NULL
&& sfn
!= fn
)
1247 if (!query (_("Line %d is not in `%s'. Jump anyway? "), sal
.line
,
1250 error (_("Not confirmed."));
1257 struct obj_section
*section
;
1259 fixup_symbol_section (sfn
, 0);
1260 section
= SYMBOL_OBJ_SECTION (symbol_objfile (sfn
), sfn
);
1261 if (section_is_overlay (section
)
1262 && !section_is_mapped (section
))
1264 if (!query (_("WARNING!!! Destination is in "
1265 "unmapped overlay! Jump anyway? ")))
1267 error (_("Not confirmed."));
1277 printf_filtered (_("Continuing at "));
1278 fputs_filtered (paddress (gdbarch
, addr
), gdb_stdout
);
1279 printf_filtered (".\n");
1282 clear_proceed_status (0);
1283 proceed (addr
, GDB_SIGNAL_0
);
1286 /* Continue program giving it specified signal. */
1289 signal_command (const char *signum_exp
, int from_tty
)
1291 enum gdb_signal oursig
;
1294 dont_repeat (); /* Too dangerous. */
1296 ensure_not_tfind_mode ();
1297 ensure_valid_thread ();
1298 ensure_not_running ();
1300 /* Find out whether we must run in the background. */
1301 gdb::unique_xmalloc_ptr
<char> stripped
1302 = strip_bg_char (signum_exp
, &async_exec
);
1303 signum_exp
= stripped
.get ();
1305 prepare_execution_command (current_top_target (), async_exec
);
1308 error_no_arg (_("signal number"));
1310 /* It would be even slicker to make signal names be valid expressions,
1311 (the type could be "enum $signal" or some such), then the user could
1312 assign them to convenience variables. */
1313 oursig
= gdb_signal_from_name (signum_exp
);
1315 if (oursig
== GDB_SIGNAL_UNKNOWN
)
1317 /* No, try numeric. */
1318 int num
= parse_and_eval_long (signum_exp
);
1321 oursig
= GDB_SIGNAL_0
;
1323 oursig
= gdb_signal_from_command (num
);
1326 /* Look for threads other than the current that this command ends up
1327 resuming too (due to schedlock off), and warn if they'll get a
1328 signal delivered. "signal 0" is used to suppress a previous
1329 signal, but if the current thread is no longer the one that got
1330 the signal, then the user is potentially suppressing the signal
1331 of the wrong thread. */
1334 int must_confirm
= 0;
1336 /* This indicates what will be resumed. Either a single thread,
1337 a whole process, or all threads of all processes. */
1338 ptid_t resume_ptid
= user_visible_resume_ptid (0);
1339 process_stratum_target
*resume_target
1340 = user_visible_resume_target (resume_ptid
);
1342 thread_info
*current
= inferior_thread ();
1344 for (thread_info
*tp
: all_non_exited_threads (resume_target
, resume_ptid
))
1349 if (tp
->suspend
.stop_signal
!= GDB_SIGNAL_0
1350 && signal_pass_state (tp
->suspend
.stop_signal
))
1353 printf_unfiltered (_("Note:\n"));
1354 printf_unfiltered (_(" Thread %s previously stopped with signal %s, %s.\n"),
1355 print_thread_id (tp
),
1356 gdb_signal_to_name (tp
->suspend
.stop_signal
),
1357 gdb_signal_to_string (tp
->suspend
.stop_signal
));
1363 && !query (_("Continuing thread %s (the current thread) with specified signal will\n"
1364 "still deliver the signals noted above to their respective threads.\n"
1365 "Continue anyway? "),
1366 print_thread_id (inferior_thread ())))
1367 error (_("Not confirmed."));
1372 if (oursig
== GDB_SIGNAL_0
)
1373 printf_filtered (_("Continuing with no signal.\n"));
1375 printf_filtered (_("Continuing with signal %s.\n"),
1376 gdb_signal_to_name (oursig
));
1379 clear_proceed_status (0);
1380 proceed ((CORE_ADDR
) -1, oursig
);
1383 /* Queue a signal to be delivered to the current thread. */
1386 queue_signal_command (const char *signum_exp
, int from_tty
)
1388 enum gdb_signal oursig
;
1389 struct thread_info
*tp
;
1392 ensure_not_tfind_mode ();
1393 ensure_valid_thread ();
1394 ensure_not_running ();
1396 if (signum_exp
== NULL
)
1397 error_no_arg (_("signal number"));
1399 /* It would be even slicker to make signal names be valid expressions,
1400 (the type could be "enum $signal" or some such), then the user could
1401 assign them to convenience variables. */
1402 oursig
= gdb_signal_from_name (signum_exp
);
1404 if (oursig
== GDB_SIGNAL_UNKNOWN
)
1406 /* No, try numeric. */
1407 int num
= parse_and_eval_long (signum_exp
);
1410 oursig
= GDB_SIGNAL_0
;
1412 oursig
= gdb_signal_from_command (num
);
1415 if (oursig
!= GDB_SIGNAL_0
1416 && !signal_pass_state (oursig
))
1417 error (_("Signal handling set to not pass this signal to the program."));
1419 tp
= inferior_thread ();
1420 tp
->suspend
.stop_signal
= oursig
;
1423 /* Data for the FSM that manages the until (with no argument)
1426 struct until_next_fsm
: public thread_fsm
1428 /* The thread that as current when the command was executed. */
1431 until_next_fsm (struct interp
*cmd_interp
, int thread
)
1432 : thread_fsm (cmd_interp
),
1437 bool should_stop (struct thread_info
*thread
) override
;
1438 void clean_up (struct thread_info
*thread
) override
;
1439 enum async_reply_reason
do_async_reply_reason () override
;
1442 /* Implementation of the 'should_stop' FSM method for the until (with
1446 until_next_fsm::should_stop (struct thread_info
*tp
)
1448 if (tp
->control
.stop_step
)
1454 /* Implementation of the 'clean_up' FSM method for the until (with no
1458 until_next_fsm::clean_up (struct thread_info
*thread
)
1460 delete_longjmp_breakpoint (thread
->global_num
);
1463 /* Implementation of the 'async_reply_reason' FSM method for the until
1464 (with no arg) command. */
1466 enum async_reply_reason
1467 until_next_fsm::do_async_reply_reason ()
1469 return EXEC_ASYNC_END_STEPPING_RANGE
;
1472 /* Proceed until we reach a different source line with pc greater than
1473 our current one or exit the function. We skip calls in both cases.
1475 Note that eventually this command should probably be changed so
1476 that only source lines are printed out when we hit the breakpoint
1477 we set. This may involve changes to wait_for_inferior and the
1478 proceed status code. */
1481 until_next_command (int from_tty
)
1483 struct frame_info
*frame
;
1485 struct symbol
*func
;
1486 struct symtab_and_line sal
;
1487 struct thread_info
*tp
= inferior_thread ();
1488 int thread
= tp
->global_num
;
1489 struct until_next_fsm
*sm
;
1491 clear_proceed_status (0);
1492 set_step_frame (tp
);
1494 frame
= get_current_frame ();
1496 /* Step until either exited from this function or greater
1497 than the current line (if in symbolic section) or pc (if
1500 pc
= get_frame_pc (frame
);
1501 func
= find_pc_function (pc
);
1505 struct bound_minimal_symbol msymbol
= lookup_minimal_symbol_by_pc (pc
);
1507 if (msymbol
.minsym
== NULL
)
1508 error (_("Execution is not within a known function."));
1510 tp
->control
.step_range_start
= BMSYMBOL_VALUE_ADDRESS (msymbol
);
1511 /* The upper-bound of step_range is exclusive. In order to make PC
1512 within the range, set the step_range_end with PC + 1. */
1513 tp
->control
.step_range_end
= pc
+ 1;
1517 sal
= find_pc_line (pc
, 0);
1519 tp
->control
.step_range_start
= BLOCK_ENTRY_PC (SYMBOL_BLOCK_VALUE (func
));
1520 tp
->control
.step_range_end
= sal
.end
;
1522 tp
->control
.may_range_step
= 1;
1524 tp
->control
.step_over_calls
= STEP_OVER_ALL
;
1526 set_longjmp_breakpoint (tp
, get_frame_id (frame
));
1527 delete_longjmp_breakpoint_cleanup
lj_deleter (thread
);
1529 sm
= new until_next_fsm (command_interp (), tp
->global_num
);
1530 tp
->thread_fsm
= sm
;
1531 lj_deleter
.release ();
1533 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
1537 until_command (const char *arg
, int from_tty
)
1542 ensure_not_tfind_mode ();
1543 ensure_valid_thread ();
1544 ensure_not_running ();
1546 /* Find out whether we must run in the background. */
1547 gdb::unique_xmalloc_ptr
<char> stripped
= strip_bg_char (arg
, &async_exec
);
1548 arg
= stripped
.get ();
1550 prepare_execution_command (current_top_target (), async_exec
);
1553 until_break_command (arg
, from_tty
, 0);
1555 until_next_command (from_tty
);
1559 advance_command (const char *arg
, int from_tty
)
1564 ensure_not_tfind_mode ();
1565 ensure_valid_thread ();
1566 ensure_not_running ();
1569 error_no_arg (_("a location"));
1571 /* Find out whether we must run in the background. */
1572 gdb::unique_xmalloc_ptr
<char> stripped
= strip_bg_char (arg
, &async_exec
);
1573 arg
= stripped
.get ();
1575 prepare_execution_command (current_top_target (), async_exec
);
1577 until_break_command (arg
, from_tty
, 1);
1580 /* Return the value of the result of a function at the end of a 'finish'
1581 command/BP. DTOR_DATA (if not NULL) can represent inferior registers
1582 right after an inferior call has finished. */
1585 get_return_value (struct value
*function
, struct type
*value_type
)
1587 regcache
*stop_regs
= get_current_regcache ();
1588 struct gdbarch
*gdbarch
= stop_regs
->arch ();
1589 struct value
*value
;
1591 value_type
= check_typedef (value_type
);
1592 gdb_assert (value_type
->code () != TYPE_CODE_VOID
);
1594 /* FIXME: 2003-09-27: When returning from a nested inferior function
1595 call, it's possible (with no help from the architecture vector)
1596 to locate and return/print a "struct return" value. This is just
1597 a more complicated case of what is already being done in the
1598 inferior function call code. In fact, when inferior function
1599 calls are made async, this will likely be made the norm. */
1601 switch (gdbarch_return_value (gdbarch
, function
, value_type
,
1604 case RETURN_VALUE_REGISTER_CONVENTION
:
1605 case RETURN_VALUE_ABI_RETURNS_ADDRESS
:
1606 case RETURN_VALUE_ABI_PRESERVES_ADDRESS
:
1607 value
= allocate_value (value_type
);
1608 gdbarch_return_value (gdbarch
, function
, value_type
, stop_regs
,
1609 value_contents_raw (value
), NULL
);
1611 case RETURN_VALUE_STRUCT_CONVENTION
:
1615 internal_error (__FILE__
, __LINE__
, _("bad switch"));
1621 /* The captured function return value/type and its position in the
1624 struct return_value_info
1626 /* The captured return value. May be NULL if we weren't able to
1627 retrieve it. See get_return_value. */
1628 struct value
*value
;
1630 /* The return type. In some cases, we'll not be able extract the
1631 return value, but we always know the type. */
1634 /* If we captured a value, this is the value history index. */
1635 int value_history_index
;
1638 /* Helper for print_return_value. */
1641 print_return_value_1 (struct ui_out
*uiout
, struct return_value_info
*rv
)
1643 if (rv
->value
!= NULL
)
1645 struct value_print_options opts
;
1648 uiout
->text ("Value returned is ");
1649 uiout
->field_fmt ("gdb-result-var", "$%d",
1650 rv
->value_history_index
);
1651 uiout
->text (" = ");
1652 get_user_print_options (&opts
);
1654 if (opts
.finish_print
)
1657 value_print (rv
->value
, &stb
, &opts
);
1658 uiout
->field_stream ("return-value", stb
);
1661 uiout
->field_string ("return-value", _("<not displayed>"),
1662 metadata_style
.style ());
1667 std::string type_name
= type_to_string (rv
->type
);
1668 uiout
->text ("Value returned has type: ");
1669 uiout
->field_string ("return-type", type_name
.c_str ());
1671 uiout
->text (" Cannot determine contents\n");
1675 /* Print the result of a function at the end of a 'finish' command.
1676 RV points at an object representing the captured return value/type
1677 and its position in the value history. */
1680 print_return_value (struct ui_out
*uiout
, struct return_value_info
*rv
)
1682 if (rv
->type
== NULL
1683 || check_typedef (rv
->type
)->code () == TYPE_CODE_VOID
)
1688 /* print_return_value_1 can throw an exception in some
1689 circumstances. We need to catch this so that we still
1690 delete the breakpoint. */
1691 print_return_value_1 (uiout
, rv
);
1693 catch (const gdb_exception
&ex
)
1695 exception_print (gdb_stdout
, ex
);
1699 /* Data for the FSM that manages the finish command. */
1701 struct finish_command_fsm
: public thread_fsm
1703 /* The momentary breakpoint set at the function's return address in
1705 breakpoint_up breakpoint
;
1707 /* The function that we're stepping out of. */
1708 struct symbol
*function
= nullptr;
1710 /* If the FSM finishes successfully, this stores the function's
1712 struct return_value_info return_value_info
{};
1714 explicit finish_command_fsm (struct interp
*cmd_interp
)
1715 : thread_fsm (cmd_interp
)
1719 bool should_stop (struct thread_info
*thread
) override
;
1720 void clean_up (struct thread_info
*thread
) override
;
1721 struct return_value_info
*return_value () override
;
1722 enum async_reply_reason
do_async_reply_reason () override
;
1725 /* Implementation of the 'should_stop' FSM method for the finish
1726 commands. Detects whether the thread stepped out of the function
1727 successfully, and if so, captures the function's return value and
1728 marks the FSM finished. */
1731 finish_command_fsm::should_stop (struct thread_info
*tp
)
1733 struct return_value_info
*rv
= &return_value_info
;
1735 if (function
!= NULL
1736 && bpstat_find_breakpoint (tp
->control
.stop_bpstat
,
1737 breakpoint
.get ()) != NULL
)
1742 rv
->type
= TYPE_TARGET_TYPE (SYMBOL_TYPE (function
));
1743 if (rv
->type
== NULL
)
1744 internal_error (__FILE__
, __LINE__
,
1745 _("finish_command: function has no target type"));
1747 if (check_typedef (rv
->type
)->code () != TYPE_CODE_VOID
)
1751 func
= read_var_value (function
, NULL
, get_current_frame ());
1752 rv
->value
= get_return_value (func
, rv
->type
);
1753 if (rv
->value
!= NULL
)
1754 rv
->value_history_index
= record_latest_value (rv
->value
);
1757 else if (tp
->control
.stop_step
)
1759 /* Finishing from an inline frame, or reverse finishing. In
1760 either case, there's no way to retrieve the return value. */
1767 /* Implementation of the 'clean_up' FSM method for the finish
1771 finish_command_fsm::clean_up (struct thread_info
*thread
)
1773 breakpoint
.reset ();
1774 delete_longjmp_breakpoint (thread
->global_num
);
1777 /* Implementation of the 'return_value' FSM method for the finish
1780 struct return_value_info
*
1781 finish_command_fsm::return_value ()
1783 return &return_value_info
;
1786 /* Implementation of the 'async_reply_reason' FSM method for the
1789 enum async_reply_reason
1790 finish_command_fsm::do_async_reply_reason ()
1792 if (execution_direction
== EXEC_REVERSE
)
1793 return EXEC_ASYNC_END_STEPPING_RANGE
;
1795 return EXEC_ASYNC_FUNCTION_FINISHED
;
1798 /* finish_backward -- helper function for finish_command. */
1801 finish_backward (struct finish_command_fsm
*sm
)
1803 struct symtab_and_line sal
;
1804 struct thread_info
*tp
= inferior_thread ();
1806 CORE_ADDR func_addr
;
1808 pc
= get_frame_pc (get_current_frame ());
1810 if (find_pc_partial_function (pc
, NULL
, &func_addr
, NULL
) == 0)
1811 error (_("Cannot find bounds of current function"));
1813 sal
= find_pc_line (func_addr
, 0);
1815 tp
->control
.proceed_to_finish
= 1;
1816 /* Special case: if we're sitting at the function entry point,
1817 then all we need to do is take a reverse singlestep. We
1818 don't need to set a breakpoint, and indeed it would do us
1821 Note that this can only happen at frame #0, since there's
1822 no way that a function up the stack can have a return address
1823 that's equal to its entry point. */
1827 struct frame_info
*frame
= get_selected_frame (NULL
);
1828 struct gdbarch
*gdbarch
= get_frame_arch (frame
);
1830 /* Set a step-resume at the function's entry point. Once that's
1831 hit, we'll do one more step backwards. */
1832 symtab_and_line sr_sal
;
1834 sr_sal
.pspace
= get_frame_program_space (frame
);
1835 insert_step_resume_breakpoint_at_sal (gdbarch
,
1836 sr_sal
, null_frame_id
);
1838 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
1842 /* We're almost there -- we just need to back up by one more
1844 tp
->control
.step_range_start
= tp
->control
.step_range_end
= 1;
1845 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
1849 /* finish_forward -- helper function for finish_command. FRAME is the
1850 frame that called the function we're about to step out of. */
1853 finish_forward (struct finish_command_fsm
*sm
, struct frame_info
*frame
)
1855 struct frame_id frame_id
= get_frame_id (frame
);
1856 struct gdbarch
*gdbarch
= get_frame_arch (frame
);
1857 struct symtab_and_line sal
;
1858 struct thread_info
*tp
= inferior_thread ();
1860 sal
= find_pc_line (get_frame_pc (frame
), 0);
1861 sal
.pc
= get_frame_pc (frame
);
1863 sm
->breakpoint
= set_momentary_breakpoint (gdbarch
, sal
,
1864 get_stack_frame_id (frame
),
1867 /* set_momentary_breakpoint invalidates FRAME. */
1870 set_longjmp_breakpoint (tp
, frame_id
);
1872 /* We want to print return value, please... */
1873 tp
->control
.proceed_to_finish
= 1;
1875 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
1878 /* Skip frames for "finish". */
1880 static struct frame_info
*
1881 skip_finish_frames (struct frame_info
*frame
)
1883 struct frame_info
*start
;
1889 frame
= skip_tailcall_frames (frame
);
1893 frame
= skip_unwritable_frames (frame
);
1897 while (start
!= frame
);
1902 /* "finish": Set a temporary breakpoint at the place the selected
1903 frame will return to, then continue. */
1906 finish_command (const char *arg
, int from_tty
)
1908 struct frame_info
*frame
;
1910 struct finish_command_fsm
*sm
;
1911 struct thread_info
*tp
;
1914 ensure_not_tfind_mode ();
1915 ensure_valid_thread ();
1916 ensure_not_running ();
1918 /* Find out whether we must run in the background. */
1919 gdb::unique_xmalloc_ptr
<char> stripped
= strip_bg_char (arg
, &async_exec
);
1920 arg
= stripped
.get ();
1922 prepare_execution_command (current_top_target (), async_exec
);
1925 error (_("The \"finish\" command does not take any arguments."));
1927 frame
= get_prev_frame (get_selected_frame (_("No selected frame.")));
1929 error (_("\"finish\" not meaningful in the outermost frame."));
1931 clear_proceed_status (0);
1933 tp
= inferior_thread ();
1935 sm
= new finish_command_fsm (command_interp ());
1937 tp
->thread_fsm
= sm
;
1939 /* Finishing from an inline frame is completely different. We don't
1940 try to show the "return value" - no way to locate it. */
1941 if (get_frame_type (get_selected_frame (_("No selected frame.")))
1944 /* Claim we are stepping in the calling frame. An empty step
1945 range means that we will stop once we aren't in a function
1946 called by that frame. We don't use the magic "1" value for
1947 step_range_end, because then infrun will think this is nexti,
1948 and not step over the rest of this inlined function call. */
1949 set_step_info (tp
, frame
, {});
1950 tp
->control
.step_range_start
= get_frame_pc (frame
);
1951 tp
->control
.step_range_end
= tp
->control
.step_range_start
;
1952 tp
->control
.step_over_calls
= STEP_OVER_ALL
;
1954 /* Print info on the selected frame, including level number but not
1958 printf_filtered (_("Run till exit from "));
1959 print_stack_frame (get_selected_frame (NULL
), 1, LOCATION
, 0);
1962 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
1966 /* Find the function we will return from. */
1968 sm
->function
= find_pc_function (get_frame_pc (get_selected_frame (NULL
)));
1970 /* Print info on the selected frame, including level number but not
1974 if (execution_direction
== EXEC_REVERSE
)
1975 printf_filtered (_("Run back to call of "));
1978 if (sm
->function
!= NULL
&& TYPE_NO_RETURN (sm
->function
->type
)
1979 && !query (_("warning: Function %s does not return normally.\n"
1980 "Try to finish anyway? "),
1981 sm
->function
->print_name ()))
1982 error (_("Not confirmed."));
1983 printf_filtered (_("Run till exit from "));
1986 print_stack_frame (get_selected_frame (NULL
), 1, LOCATION
, 0);
1989 if (execution_direction
== EXEC_REVERSE
)
1990 finish_backward (sm
);
1993 frame
= skip_finish_frames (frame
);
1996 error (_("Cannot find the caller frame."));
1998 finish_forward (sm
, frame
);
2004 info_program_command (const char *args
, int from_tty
)
2009 process_stratum_target
*proc_target
;
2011 if (!target_has_execution
)
2013 printf_filtered (_("The program being debugged is not being run.\n"));
2019 ptid
= inferior_ptid
;
2020 proc_target
= current_inferior ()->process_target ();
2023 get_last_target_status (&proc_target
, &ptid
, nullptr);
2025 if (ptid
== null_ptid
|| ptid
== minus_one_ptid
)
2026 error (_("No selected thread."));
2028 thread_info
*tp
= find_thread_ptid (proc_target
, ptid
);
2030 if (tp
->state
== THREAD_EXITED
)
2031 error (_("Invalid selected thread."));
2032 else if (tp
->state
== THREAD_RUNNING
)
2033 error (_("Selected thread is running."));
2035 bs
= tp
->control
.stop_bpstat
;
2036 stat
= bpstat_num (&bs
, &num
);
2038 target_files_info ();
2039 printf_filtered (_("Program stopped at %s.\n"),
2040 paddress (target_gdbarch (), tp
->suspend
.stop_pc
));
2041 if (tp
->control
.stop_step
)
2042 printf_filtered (_("It stopped after being stepped.\n"));
2045 /* There may be several breakpoints in the same place, so this
2046 isn't as strange as it seems. */
2051 printf_filtered (_("It stopped at a breakpoint "
2052 "that has since been deleted.\n"));
2055 printf_filtered (_("It stopped at breakpoint %d.\n"), num
);
2056 stat
= bpstat_num (&bs
, &num
);
2059 else if (tp
->suspend
.stop_signal
!= GDB_SIGNAL_0
)
2061 printf_filtered (_("It stopped with signal %s, %s.\n"),
2062 gdb_signal_to_name (tp
->suspend
.stop_signal
),
2063 gdb_signal_to_string (tp
->suspend
.stop_signal
));
2068 printf_filtered (_("Type \"info stack\" or \"info "
2069 "registers\" for more information.\n"));
2074 environment_info (const char *var
, int from_tty
)
2078 const char *val
= current_inferior ()->environment
.get (var
);
2082 puts_filtered (var
);
2083 puts_filtered (" = ");
2084 puts_filtered (val
);
2085 puts_filtered ("\n");
2089 puts_filtered ("Environment variable \"");
2090 puts_filtered (var
);
2091 puts_filtered ("\" not defined.\n");
2096 char **envp
= current_inferior ()->environment
.envp ();
2098 for (int idx
= 0; envp
[idx
] != NULL
; ++idx
)
2100 puts_filtered (envp
[idx
]);
2101 puts_filtered ("\n");
2107 set_environment_command (const char *arg
, int from_tty
)
2109 const char *p
, *val
;
2113 error_no_arg (_("environment variable and value"));
2115 /* Find separation between variable name and value. */
2116 p
= (char *) strchr (arg
, '=');
2117 val
= (char *) strchr (arg
, ' ');
2119 if (p
!= 0 && val
!= 0)
2121 /* We have both a space and an equals. If the space is before the
2122 equals, walk forward over the spaces til we see a nonspace
2123 (possibly the equals). */
2128 /* Now if the = is after the char following the spaces,
2129 take the char following the spaces. */
2133 else if (val
!= 0 && p
== 0)
2137 error_no_arg (_("environment variable to set"));
2139 if (p
== 0 || p
[1] == 0)
2143 p
= arg
+ strlen (arg
); /* So that savestring below will work. */
2147 /* Not setting variable value to null. */
2149 while (*val
== ' ' || *val
== '\t')
2153 while (p
!= arg
&& (p
[-1] == ' ' || p
[-1] == '\t'))
2156 std::string
var (arg
, p
- arg
);
2159 printf_filtered (_("Setting environment variable "
2160 "\"%s\" to null value.\n"),
2162 current_inferior ()->environment
.set (var
.c_str (), "");
2165 current_inferior ()->environment
.set (var
.c_str (), val
);
2169 unset_environment_command (const char *var
, int from_tty
)
2173 /* If there is no argument, delete all environment variables.
2174 Ask for confirmation if reading from the terminal. */
2175 if (!from_tty
|| query (_("Delete all environment variables? ")))
2176 current_inferior ()->environment
.clear ();
2179 current_inferior ()->environment
.unset (var
);
2182 /* Handle the execution path (PATH variable). */
2184 static const char path_var_name
[] = "PATH";
2187 path_info (const char *args
, int from_tty
)
2189 puts_filtered ("Executable and object file path: ");
2190 puts_filtered (current_inferior ()->environment
.get (path_var_name
));
2191 puts_filtered ("\n");
2194 /* Add zero or more directories to the front of the execution path. */
2197 path_command (const char *dirname
, int from_tty
)
2203 env
= current_inferior ()->environment
.get (path_var_name
);
2204 /* Can be null if path is not set. */
2207 exec_path
= xstrdup (env
);
2208 mod_path (dirname
, &exec_path
);
2209 current_inferior ()->environment
.set (path_var_name
, exec_path
);
2212 path_info (NULL
, from_tty
);
2217 pad_to_column (string_file
&stream
, int col
)
2219 /* At least one space must be printed to separate columns. */
2221 const int size
= stream
.size ();
2223 stream
.puts (n_spaces (col
- size
));
2226 /* Print out the register NAME with value VAL, to FILE, in the default
2230 default_print_one_register_info (struct ui_file
*file
,
2234 struct type
*regtype
= value_type (val
);
2235 int print_raw_format
;
2236 string_file format_stream
;
2239 value_column_1
= 15,
2240 /* Give enough room for "0x", 16 hex digits and two spaces in
2241 preceding column. */
2242 value_column_2
= value_column_1
+ 2 + 16 + 2,
2245 format_stream
.puts (name
);
2246 pad_to_column (format_stream
, value_column_1
);
2248 print_raw_format
= (value_entirely_available (val
)
2249 && !value_optimized_out (val
));
2251 /* If virtual format is floating, print it that way, and in raw
2253 if (regtype
->code () == TYPE_CODE_FLT
2254 || regtype
->code () == TYPE_CODE_DECFLOAT
)
2256 struct value_print_options opts
;
2257 const gdb_byte
*valaddr
= value_contents_for_printing (val
);
2258 enum bfd_endian byte_order
= type_byte_order (regtype
);
2260 get_user_print_options (&opts
);
2263 common_val_print (val
, &format_stream
, 0, &opts
, current_language
);
2265 if (print_raw_format
)
2267 pad_to_column (format_stream
, value_column_2
);
2268 format_stream
.puts ("(raw ");
2269 print_hex_chars (&format_stream
, valaddr
, TYPE_LENGTH (regtype
),
2271 format_stream
.putc (')');
2276 struct value_print_options opts
;
2278 /* Print the register in hex. */
2279 get_formatted_print_options (&opts
, 'x');
2281 common_val_print (val
, &format_stream
, 0, &opts
, current_language
);
2282 /* If not a vector register, print it also according to its
2284 if (print_raw_format
&& TYPE_VECTOR (regtype
) == 0)
2286 pad_to_column (format_stream
, value_column_2
);
2287 get_user_print_options (&opts
);
2289 common_val_print (val
, &format_stream
, 0, &opts
, current_language
);
2293 fputs_filtered (format_stream
.c_str (), file
);
2294 fprintf_filtered (file
, "\n");
2297 /* Print out the machine register regnum. If regnum is -1, print all
2298 registers (print_all == 1) or all non-float and non-vector
2299 registers (print_all == 0).
2301 For most machines, having all_registers_info() print the
2302 register(s) one per line is good enough. If a different format is
2303 required, (eg, for MIPS or Pyramid 90x, which both have lots of
2304 regs), or there is an existing convention for showing all the
2305 registers, define the architecture method PRINT_REGISTERS_INFO to
2306 provide that format. */
2309 default_print_registers_info (struct gdbarch
*gdbarch
,
2310 struct ui_file
*file
,
2311 struct frame_info
*frame
,
2312 int regnum
, int print_all
)
2315 const int numregs
= gdbarch_num_cooked_regs (gdbarch
);
2317 for (i
= 0; i
< numregs
; i
++)
2319 /* Decide between printing all regs, non-float / vector regs, or
2325 if (!gdbarch_register_reggroup_p (gdbarch
, i
, all_reggroup
))
2330 if (!gdbarch_register_reggroup_p (gdbarch
, i
, general_reggroup
))
2340 /* If the register name is empty, it is undefined for this
2341 processor, so don't display anything. */
2342 if (gdbarch_register_name (gdbarch
, i
) == NULL
2343 || *(gdbarch_register_name (gdbarch
, i
)) == '\0')
2346 default_print_one_register_info (file
,
2347 gdbarch_register_name (gdbarch
, i
),
2348 value_of_register (i
, frame
));
2353 registers_info (const char *addr_exp
, int fpregs
)
2355 struct frame_info
*frame
;
2356 struct gdbarch
*gdbarch
;
2358 if (!target_has_registers
)
2359 error (_("The program has no registers now."));
2360 frame
= get_selected_frame (NULL
);
2361 gdbarch
= get_frame_arch (frame
);
2365 gdbarch_print_registers_info (gdbarch
, gdb_stdout
,
2370 while (*addr_exp
!= '\0')
2375 /* Skip leading white space. */
2376 addr_exp
= skip_spaces (addr_exp
);
2378 /* Discard any leading ``$''. Check that there is something
2379 resembling a register following it. */
2380 if (addr_exp
[0] == '$')
2382 if (isspace ((*addr_exp
)) || (*addr_exp
) == '\0')
2383 error (_("Missing register name"));
2385 /* Find the start/end of this register name/num/group. */
2387 while ((*addr_exp
) != '\0' && !isspace ((*addr_exp
)))
2391 /* Figure out what we've found and display it. */
2393 /* A register name? */
2395 int regnum
= user_reg_map_name_to_regnum (gdbarch
, start
, end
- start
);
2399 /* User registers lie completely outside of the range of
2400 normal registers. Catch them early so that the target
2402 if (regnum
>= gdbarch_num_cooked_regs (gdbarch
))
2404 struct value
*regval
= value_of_user_reg (regnum
, frame
);
2405 const char *regname
= user_reg_map_regnum_to_name (gdbarch
,
2408 /* Print in the same fashion
2409 gdbarch_print_registers_info's default
2410 implementation prints. */
2411 default_print_one_register_info (gdb_stdout
,
2416 gdbarch_print_registers_info (gdbarch
, gdb_stdout
,
2417 frame
, regnum
, fpregs
);
2422 /* A register group? */
2424 struct reggroup
*group
;
2426 for (group
= reggroup_next (gdbarch
, NULL
);
2428 group
= reggroup_next (gdbarch
, group
))
2430 /* Don't bother with a length check. Should the user
2431 enter a short register group name, go with the first
2432 group that matches. */
2433 if (strncmp (start
, reggroup_name (group
), end
- start
) == 0)
2441 regnum
< gdbarch_num_cooked_regs (gdbarch
);
2444 if (gdbarch_register_reggroup_p (gdbarch
, regnum
, group
))
2445 gdbarch_print_registers_info (gdbarch
,
2453 /* Nothing matched. */
2454 error (_("Invalid register `%.*s'"), (int) (end
- start
), start
);
2459 info_all_registers_command (const char *addr_exp
, int from_tty
)
2461 registers_info (addr_exp
, 1);
2465 info_registers_command (const char *addr_exp
, int from_tty
)
2467 registers_info (addr_exp
, 0);
2471 print_vector_info (struct ui_file
*file
,
2472 struct frame_info
*frame
, const char *args
)
2474 struct gdbarch
*gdbarch
= get_frame_arch (frame
);
2476 if (gdbarch_print_vector_info_p (gdbarch
))
2477 gdbarch_print_vector_info (gdbarch
, file
, frame
, args
);
2481 int printed_something
= 0;
2483 for (regnum
= 0; regnum
< gdbarch_num_cooked_regs (gdbarch
); regnum
++)
2485 if (gdbarch_register_reggroup_p (gdbarch
, regnum
, vector_reggroup
))
2487 printed_something
= 1;
2488 gdbarch_print_registers_info (gdbarch
, file
, frame
, regnum
, 1);
2491 if (!printed_something
)
2492 fprintf_filtered (file
, "No vector information\n");
2497 info_vector_command (const char *args
, int from_tty
)
2499 if (!target_has_registers
)
2500 error (_("The program has no registers now."));
2502 print_vector_info (gdb_stdout
, get_selected_frame (NULL
), args
);
2505 /* Kill the inferior process. Make us have no inferior. */
2508 kill_command (const char *arg
, int from_tty
)
2510 /* FIXME: This should not really be inferior_ptid (or target_has_execution).
2511 It should be a distinct flag that indicates that a target is active, cuz
2512 some targets don't have processes! */
2514 if (inferior_ptid
== null_ptid
)
2515 error (_("The program is not being run."));
2516 if (!query (_("Kill the program being debugged? ")))
2517 error (_("Not confirmed."));
2519 int pid
= current_inferior ()->pid
;
2520 /* Save the pid as a string before killing the inferior, since that
2521 may unpush the current target, and we need the string after. */
2522 std::string pid_str
= target_pid_to_str (ptid_t (pid
));
2523 int infnum
= current_inferior ()->num
;
2527 if (print_inferior_events
)
2528 printf_unfiltered (_("[Inferior %d (%s) killed]\n"),
2529 infnum
, pid_str
.c_str ());
2531 bfd_cache_close_all ();
2534 /* Used in `attach&' command. Proceed threads of inferior INF iff
2535 they stopped due to debugger request, and when they did, they
2536 reported a clean stop (GDB_SIGNAL_0). Do not proceed threads that
2537 have been explicitly been told to stop. */
2540 proceed_after_attach (inferior
*inf
)
2542 /* Don't error out if the current thread is running, because
2543 there may be other stopped threads. */
2545 /* Backup current thread and selected frame. */
2546 scoped_restore_current_thread restore_thread
;
2548 for (thread_info
*thread
: inf
->non_exited_threads ())
2549 if (!thread
->executing
2550 && !thread
->stop_requested
2551 && thread
->suspend
.stop_signal
== GDB_SIGNAL_0
)
2553 switch_to_thread (thread
);
2554 clear_proceed_status (0);
2555 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
2559 /* See inferior.h. */
2562 setup_inferior (int from_tty
)
2564 struct inferior
*inferior
;
2566 inferior
= current_inferior ();
2567 inferior
->needs_setup
= 0;
2569 /* If no exec file is yet known, try to determine it from the
2571 if (get_exec_file (0) == NULL
)
2572 exec_file_locate_attach (inferior_ptid
.pid (), 1, from_tty
);
2575 reopen_exec_file ();
2579 /* Take any necessary post-attaching actions for this platform. */
2580 target_post_attach (inferior_ptid
.pid ());
2582 post_create_inferior (current_top_target (), from_tty
);
2585 /* What to do after the first program stops after attaching. */
2586 enum attach_post_wait_mode
2588 /* Do nothing. Leaves threads as they are. */
2589 ATTACH_POST_WAIT_NOTHING
,
2591 /* Re-resume threads that are marked running. */
2592 ATTACH_POST_WAIT_RESUME
,
2594 /* Stop all threads. */
2595 ATTACH_POST_WAIT_STOP
,
2598 /* Called after we've attached to a process and we've seen it stop for
2599 the first time. If ASYNC_EXEC is true, re-resume threads that
2600 should be running. Else if ATTACH, */
2603 attach_post_wait (const char *args
, int from_tty
, enum attach_post_wait_mode mode
)
2605 struct inferior
*inferior
;
2607 inferior
= current_inferior ();
2608 inferior
->control
.stop_soon
= NO_STOP_QUIETLY
;
2610 if (inferior
->needs_setup
)
2611 setup_inferior (from_tty
);
2613 if (mode
== ATTACH_POST_WAIT_RESUME
)
2615 /* The user requested an `attach&', so be sure to leave threads
2616 that didn't get a signal running. */
2618 /* Immediatelly resume all suspended threads of this inferior,
2619 and this inferior only. This should have no effect on
2620 already running threads. If a thread has been stopped with a
2621 signal, leave it be. */
2623 proceed_after_attach (inferior
);
2626 if (inferior_thread ()->suspend
.stop_signal
== GDB_SIGNAL_0
)
2628 clear_proceed_status (0);
2629 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
2633 else if (mode
== ATTACH_POST_WAIT_STOP
)
2635 /* The user requested a plain `attach', so be sure to leave
2636 the inferior stopped. */
2638 /* At least the current thread is already stopped. */
2640 /* In all-stop, by definition, all threads have to be already
2641 stopped at this point. In non-stop, however, although the
2642 selected thread is stopped, others may still be executing.
2643 Be sure to explicitly stop all threads of the process. This
2644 should have no effect on already stopped threads. */
2646 target_stop (ptid_t (inferior
->pid
));
2647 else if (target_is_non_stop_p ())
2649 struct thread_info
*lowest
= inferior_thread ();
2651 stop_all_threads ();
2653 /* It's not defined which thread will report the attach
2654 stop. For consistency, always select the thread with
2655 lowest GDB number, which should be the main thread, if it
2657 for (thread_info
*thread
: current_inferior ()->non_exited_threads ())
2658 if (thread
->inf
->num
< lowest
->inf
->num
2659 || thread
->per_inf_num
< lowest
->per_inf_num
)
2662 switch_to_thread (lowest
);
2665 /* Tell the user/frontend where we're stopped. */
2667 if (deprecated_attach_hook
)
2668 deprecated_attach_hook ();
2672 struct attach_command_continuation_args
2676 enum attach_post_wait_mode mode
;
2680 attach_command_continuation (void *args
, int err
)
2682 struct attach_command_continuation_args
*a
2683 = (struct attach_command_continuation_args
*) args
;
2688 attach_post_wait (a
->args
, a
->from_tty
, a
->mode
);
2692 attach_command_continuation_free_args (void *args
)
2694 struct attach_command_continuation_args
*a
2695 = (struct attach_command_continuation_args
*) args
;
2701 /* "attach" command entry point. Takes a program started up outside
2702 of gdb and ``attaches'' to it. This stops it cold in its tracks
2703 and allows us to start debugging it. */
2706 attach_command (const char *args
, int from_tty
)
2709 struct target_ops
*attach_target
;
2710 struct inferior
*inferior
= current_inferior ();
2711 enum attach_post_wait_mode mode
;
2713 dont_repeat (); /* Not for the faint of heart */
2715 if (gdbarch_has_global_solist (target_gdbarch ()))
2716 /* Don't complain if all processes share the same symbol
2719 else if (target_has_execution
)
2721 if (query (_("A program is being debugged already. Kill it? ")))
2724 error (_("Not killed."));
2727 /* Clean up any leftovers from other runs. Some other things from
2728 this function should probably be moved into target_pre_inferior. */
2729 target_pre_inferior (from_tty
);
2731 gdb::unique_xmalloc_ptr
<char> stripped
= strip_bg_char (args
, &async_exec
);
2732 args
= stripped
.get ();
2734 attach_target
= find_attach_target ();
2736 prepare_execution_command (attach_target
, async_exec
);
2738 if (non_stop
&& !attach_target
->supports_non_stop ())
2739 error (_("Cannot attach to this target in non-stop mode"));
2741 attach_target
->attach (args
, from_tty
);
2742 /* to_attach should push the target, so after this point we
2743 shouldn't refer to attach_target again. */
2744 attach_target
= NULL
;
2746 /* Set up the "saved terminal modes" of the inferior
2747 based on what modes we are starting it with. */
2748 target_terminal::init ();
2750 /* Install inferior's terminal modes. This may look like a no-op,
2751 as we've just saved them above, however, this does more than
2752 restore terminal settings:
2754 - installs a SIGINT handler that forwards SIGINT to the inferior.
2755 Otherwise a Ctrl-C pressed just while waiting for the initial
2756 stop would end up as a spurious Quit.
2758 - removes stdin from the event loop, which we need if attaching
2759 in the foreground, otherwise on targets that report an initial
2760 stop on attach (which are most) we'd process input/commands
2761 while we're in the event loop waiting for that stop. That is,
2762 before the attach continuation runs and the command is really
2764 target_terminal::inferior ();
2766 /* Set up execution context to know that we should return from
2767 wait_for_inferior as soon as the target reports a stop. */
2768 init_wait_for_inferior ();
2769 clear_proceed_status (0);
2771 inferior
->needs_setup
= 1;
2773 if (target_is_non_stop_p ())
2775 /* If we find that the current thread isn't stopped, explicitly
2776 do so now, because we're going to install breakpoints and
2780 /* The user requested an `attach&'; stop just one thread. */
2781 target_stop (inferior_ptid
);
2783 /* The user requested an `attach', so stop all threads of this
2785 target_stop (ptid_t (inferior_ptid
.pid ()));
2788 /* Check for exec file mismatch, and let the user solve it. */
2789 validate_exec_file (from_tty
);
2791 mode
= async_exec
? ATTACH_POST_WAIT_RESUME
: ATTACH_POST_WAIT_STOP
;
2793 /* Some system don't generate traps when attaching to inferior.
2794 E.g. Mach 3 or GNU hurd. */
2795 if (!target_attach_no_wait ())
2797 struct attach_command_continuation_args
*a
;
2799 /* Careful here. See comments in inferior.h. Basically some
2800 OSes don't ignore SIGSTOPs on continue requests anymore. We
2801 need a way for handle_inferior_event to reset the stop_signal
2802 variable after an attach, and this is what
2803 STOP_QUIETLY_NO_SIGSTOP is for. */
2804 inferior
->control
.stop_soon
= STOP_QUIETLY_NO_SIGSTOP
;
2806 /* Wait for stop. */
2807 a
= XNEW (struct attach_command_continuation_args
);
2808 a
->args
= xstrdup (args
);
2809 a
->from_tty
= from_tty
;
2811 add_inferior_continuation (attach_command_continuation
, a
,
2812 attach_command_continuation_free_args
);
2814 /* Let infrun consider waiting for events out of this
2816 inferior
->process_target ()->threads_executing
= true;
2818 if (!target_is_async_p ())
2819 mark_infrun_async_event_handler ();
2823 attach_post_wait (args
, from_tty
, mode
);
2826 /* We had just found out that the target was already attached to an
2827 inferior. PTID points at a thread of this new inferior, that is
2828 the most likely to be stopped right now, but not necessarily so.
2829 The new inferior is assumed to be already added to the inferior
2830 list at this point. If LEAVE_RUNNING, then leave the threads of
2831 this inferior running, except those we've explicitly seen reported
2835 notice_new_inferior (thread_info
*thr
, int leave_running
, int from_tty
)
2837 enum attach_post_wait_mode mode
2838 = leave_running
? ATTACH_POST_WAIT_RESUME
: ATTACH_POST_WAIT_NOTHING
;
2840 gdb::optional
<scoped_restore_current_thread
> restore_thread
;
2842 if (inferior_ptid
!= null_ptid
)
2843 restore_thread
.emplace ();
2845 /* Avoid reading registers -- we haven't fetched the target
2847 switch_to_thread_no_regs (thr
);
2849 /* When we "notice" a new inferior we need to do all the things we
2850 would normally do if we had just attached to it. */
2854 struct attach_command_continuation_args
*a
;
2855 struct inferior
*inferior
= current_inferior ();
2857 /* We're going to install breakpoints, and poke at memory,
2858 ensure that the inferior is stopped for a moment while we do
2860 target_stop (inferior_ptid
);
2862 inferior
->control
.stop_soon
= STOP_QUIETLY_REMOTE
;
2864 /* Wait for stop before proceeding. */
2865 a
= XNEW (struct attach_command_continuation_args
);
2866 a
->args
= xstrdup ("");
2867 a
->from_tty
= from_tty
;
2869 add_inferior_continuation (attach_command_continuation
, a
,
2870 attach_command_continuation_free_args
);
2875 attach_post_wait ("" /* args */, from_tty
, mode
);
2880 * takes a program previously attached to and detaches it.
2881 * The program resumes execution and will no longer stop
2882 * on signals, etc. We better not have left any breakpoints
2883 * in the program or it'll die when it hits one. For this
2884 * to work, it may be necessary for the process to have been
2885 * previously attached. It *might* work if the program was
2886 * started via the normal ptrace (PTRACE_TRACEME).
2890 detach_command (const char *args
, int from_tty
)
2892 dont_repeat (); /* Not for the faint of heart. */
2894 if (inferior_ptid
== null_ptid
)
2895 error (_("The program is not being run."));
2897 query_if_trace_running (from_tty
);
2899 disconnect_tracing ();
2901 target_detach (current_inferior (), from_tty
);
2903 /* The current inferior process was just detached successfully. Get
2904 rid of breakpoints that no longer make sense. Note we don't do
2905 this within target_detach because that is also used when
2906 following child forks, and in that case we will want to transfer
2907 breakpoints to the child, not delete them. */
2908 breakpoint_init_inferior (inf_exited
);
2910 /* If the solist is global across inferiors, don't clear it when we
2911 detach from a single inferior. */
2912 if (!gdbarch_has_global_solist (target_gdbarch ()))
2913 no_shared_libraries (NULL
, from_tty
);
2915 if (deprecated_detach_hook
)
2916 deprecated_detach_hook ();
2919 /* Disconnect from the current target without resuming it (leaving it
2920 waiting for a debugger).
2922 We'd better not have left any breakpoints in the program or the
2923 next debugger will get confused. Currently only supported for some
2924 remote targets, since the normal attach mechanisms don't work on
2925 stopped processes on some native platforms (e.g. GNU/Linux). */
2928 disconnect_command (const char *args
, int from_tty
)
2930 dont_repeat (); /* Not for the faint of heart. */
2931 query_if_trace_running (from_tty
);
2932 disconnect_tracing ();
2933 target_disconnect (args
, from_tty
);
2934 no_shared_libraries (NULL
, from_tty
);
2935 init_thread_list ();
2936 if (deprecated_detach_hook
)
2937 deprecated_detach_hook ();
2940 /* Stop PTID in the current target, and tag the PTID threads as having
2941 been explicitly requested to stop. PTID can be a thread, a
2942 process, or minus_one_ptid, meaning all threads of all inferiors of
2943 the current target. */
2946 stop_current_target_threads_ns (ptid_t ptid
)
2950 /* Tag the thread as having been explicitly requested to stop, so
2951 other parts of gdb know not to resume this thread automatically,
2952 if it was stopped due to an internal event. Limit this to
2953 non-stop mode, as when debugging a multi-threaded application in
2954 all-stop mode, we will only get one stop event --- it's undefined
2955 which thread will report the event. */
2956 set_stop_requested (current_inferior ()->process_target (),
2960 /* See inferior.h. */
2963 interrupt_target_1 (bool all_threads
)
2969 scoped_restore_current_thread restore_thread
;
2971 for (inferior
*inf
: all_inferiors ())
2973 switch_to_inferior_no_thread (inf
);
2974 stop_current_target_threads_ns (minus_one_ptid
);
2978 stop_current_target_threads_ns (inferior_ptid
);
2981 target_interrupt ();
2985 Stop the execution of the target while running in async mode, in
2986 the background. In all-stop, stop the whole process. In non-stop
2987 mode, stop the current thread only by default, or stop all threads
2988 if the `-a' switch is used. */
2991 interrupt_command (const char *args
, int from_tty
)
2993 if (target_can_async_p ())
2995 int all_threads
= 0;
2997 dont_repeat (); /* Not for the faint of heart. */
3000 && startswith (args
, "-a"))
3003 if (!non_stop
&& all_threads
)
3004 error (_("-a is meaningless in all-stop mode."));
3006 interrupt_target_1 (all_threads
);
3010 /* See inferior.h. */
3013 default_print_float_info (struct gdbarch
*gdbarch
, struct ui_file
*file
,
3014 struct frame_info
*frame
, const char *args
)
3017 int printed_something
= 0;
3019 for (regnum
= 0; regnum
< gdbarch_num_cooked_regs (gdbarch
); regnum
++)
3021 if (gdbarch_register_reggroup_p (gdbarch
, regnum
, float_reggroup
))
3023 printed_something
= 1;
3024 gdbarch_print_registers_info (gdbarch
, file
, frame
, regnum
, 1);
3027 if (!printed_something
)
3028 fprintf_filtered (file
, "No floating-point info "
3029 "available for this processor.\n");
3033 info_float_command (const char *args
, int from_tty
)
3035 struct frame_info
*frame
;
3037 if (!target_has_registers
)
3038 error (_("The program has no registers now."));
3040 frame
= get_selected_frame (NULL
);
3041 gdbarch_print_float_info (get_frame_arch (frame
), gdb_stdout
, frame
, args
);
3044 /* Implement `info proc' family of commands. */
3047 info_proc_cmd_1 (const char *args
, enum info_proc_what what
, int from_tty
)
3049 struct gdbarch
*gdbarch
= get_current_arch ();
3051 if (!target_info_proc (args
, what
))
3053 if (gdbarch_info_proc_p (gdbarch
))
3054 gdbarch_info_proc (gdbarch
, args
, what
);
3056 error (_("Not supported on this target."));
3060 /* Implement `info proc' when given without any further parameters. */
3063 info_proc_cmd (const char *args
, int from_tty
)
3065 info_proc_cmd_1 (args
, IP_MINIMAL
, from_tty
);
3068 /* Implement `info proc mappings'. */
3071 info_proc_cmd_mappings (const char *args
, int from_tty
)
3073 info_proc_cmd_1 (args
, IP_MAPPINGS
, from_tty
);
3076 /* Implement `info proc stat'. */
3079 info_proc_cmd_stat (const char *args
, int from_tty
)
3081 info_proc_cmd_1 (args
, IP_STAT
, from_tty
);
3084 /* Implement `info proc status'. */
3087 info_proc_cmd_status (const char *args
, int from_tty
)
3089 info_proc_cmd_1 (args
, IP_STATUS
, from_tty
);
3092 /* Implement `info proc cwd'. */
3095 info_proc_cmd_cwd (const char *args
, int from_tty
)
3097 info_proc_cmd_1 (args
, IP_CWD
, from_tty
);
3100 /* Implement `info proc cmdline'. */
3103 info_proc_cmd_cmdline (const char *args
, int from_tty
)
3105 info_proc_cmd_1 (args
, IP_CMDLINE
, from_tty
);
3108 /* Implement `info proc exe'. */
3111 info_proc_cmd_exe (const char *args
, int from_tty
)
3113 info_proc_cmd_1 (args
, IP_EXE
, from_tty
);
3116 /* Implement `info proc files'. */
3119 info_proc_cmd_files (const char *args
, int from_tty
)
3121 info_proc_cmd_1 (args
, IP_FILES
, from_tty
);
3124 /* Implement `info proc all'. */
3127 info_proc_cmd_all (const char *args
, int from_tty
)
3129 info_proc_cmd_1 (args
, IP_ALL
, from_tty
);
3132 /* Implement `show print finish'. */
3135 show_print_finish (struct ui_file
*file
, int from_tty
,
3136 struct cmd_list_element
*c
,
3139 fprintf_filtered (file
, _("\
3140 Printing of return value after `finish' is %s.\n"),
3145 /* This help string is used for the run, start, and starti commands.
3146 It is defined as a macro to prevent duplication. */
3148 #define RUN_ARGS_HELP \
3149 "You may specify arguments to give it.\n\
3150 Args may include \"*\", or \"[...]\"; they are expanded using the\n\
3151 shell that will start the program (specified by the \"$SHELL\" environment\n\
3152 variable). Input and output redirection with \">\", \"<\", or \">>\"\n\
3153 are also allowed.\n\
3155 With no arguments, uses arguments last specified (with \"run\" or \n\
3156 \"set args\"). To cancel previous arguments and run with no arguments,\n\
3157 use \"set args\" without arguments.\n\
3159 To start the inferior without using a shell, use \"set startup-with-shell off\"."
3161 void _initialize_infcmd ();
3163 _initialize_infcmd ()
3165 static struct cmd_list_element
*info_proc_cmdlist
;
3166 struct cmd_list_element
*c
= NULL
;
3167 const char *cmd_name
;
3169 /* Add the filename of the terminal connected to inferior I/O. */
3170 add_setshow_optional_filename_cmd ("inferior-tty", class_run
,
3171 &inferior_io_terminal_scratch
, _("\
3172 Set terminal for future runs of program being debugged."), _("\
3173 Show terminal for future runs of program being debugged."), _("\
3174 Usage: set inferior-tty [TTY]\n\n\
3175 If TTY is omitted, the default behavior of using the same terminal as GDB\n\
3177 set_inferior_tty_command
,
3178 show_inferior_tty_command
,
3179 &setlist
, &showlist
);
3180 cmd_name
= "inferior-tty";
3181 c
= lookup_cmd (&cmd_name
, setlist
, "", -1, 1);
3182 gdb_assert (c
!= NULL
);
3183 add_alias_cmd ("tty", c
, class_alias
, 0, &cmdlist
);
3186 add_setshow_string_noescape_cmd (cmd_name
, class_run
,
3187 &inferior_args_scratch
, _("\
3188 Set argument list to give program being debugged when it is started."), _("\
3189 Show argument list to give program being debugged when it is started."), _("\
3190 Follow this command with any number of args, to be passed to the program."),
3193 &setlist
, &showlist
);
3194 c
= lookup_cmd (&cmd_name
, setlist
, "", -1, 1);
3195 gdb_assert (c
!= NULL
);
3196 set_cmd_completer (c
, filename_completer
);
3199 add_setshow_string_noescape_cmd (cmd_name
, class_run
,
3200 &inferior_cwd_scratch
, _("\
3201 Set the current working directory to be used when the inferior is started.\n\
3202 Changing this setting does not have any effect on inferiors that are\n\
3205 Show the current working directory that is used when the inferior is started."),
3207 Use this command to change the current working directory that will be used\n\
3208 when the inferior is started. This setting does not affect GDB's current\n\
3209 working directory."),
3212 &setlist
, &showlist
);
3213 c
= lookup_cmd (&cmd_name
, setlist
, "", -1, 1);
3214 gdb_assert (c
!= NULL
);
3215 set_cmd_completer (c
, filename_completer
);
3217 c
= add_cmd ("environment", no_class
, environment_info
, _("\
3218 The environment to give the program, or one variable's value.\n\
3219 With an argument VAR, prints the value of environment variable VAR to\n\
3220 give the program being debugged. With no arguments, prints the entire\n\
3221 environment to be given to the program."), &showlist
);
3222 set_cmd_completer (c
, noop_completer
);
3224 add_basic_prefix_cmd ("unset", no_class
,
3225 _("Complement to certain \"set\" commands."),
3226 &unsetlist
, "unset ", 0, &cmdlist
);
3228 c
= add_cmd ("environment", class_run
, unset_environment_command
, _("\
3229 Cancel environment variable VAR for the program.\n\
3230 This does not affect the program until the next \"run\" command."),
3232 set_cmd_completer (c
, noop_completer
);
3234 c
= add_cmd ("environment", class_run
, set_environment_command
, _("\
3235 Set environment variable value to give the program.\n\
3236 Arguments are VAR VALUE where VAR is variable name and VALUE is value.\n\
3237 VALUES of environment variables are uninterpreted strings.\n\
3238 This does not affect the program until the next \"run\" command."),
3240 set_cmd_completer (c
, noop_completer
);
3242 c
= add_com ("path", class_files
, path_command
, _("\
3243 Add directory DIR(s) to beginning of search path for object files.\n\
3244 $cwd in the path means the current working directory.\n\
3245 This path is equivalent to the $PATH shell variable. It is a list of\n\
3246 directories, separated by colons. These directories are searched to find\n\
3247 fully linked executable files and separately compiled object files as \
3249 set_cmd_completer (c
, filename_completer
);
3251 c
= add_cmd ("paths", no_class
, path_info
, _("\
3252 Current search path for finding object files.\n\
3253 $cwd in the path means the current working directory.\n\
3254 This path is equivalent to the $PATH shell variable. It is a list of\n\
3255 directories, separated by colons. These directories are searched to find\n\
3256 fully linked executable files and separately compiled object files as \
3259 set_cmd_completer (c
, noop_completer
);
3261 add_prefix_cmd ("kill", class_run
, kill_command
,
3262 _("Kill execution of program being debugged."),
3263 &killlist
, "kill ", 0, &cmdlist
);
3265 add_com ("attach", class_run
, attach_command
, _("\
3266 Attach to a process or file outside of GDB.\n\
3267 This command attaches to another target, of the same type as your last\n\
3268 \"target\" command (\"info files\" will show your target stack).\n\
3269 The command may take as argument a process id or a device file.\n\
3270 For a process id, you must have permission to send the process a signal,\n\
3271 and it must have the same effective uid as the debugger.\n\
3272 When using \"attach\" with a process id, the debugger finds the\n\
3273 program running in the process, looking first in the current working\n\
3274 directory, or (if not found there) using the source file search path\n\
3275 (see the \"directory\" command). You can also use the \"file\" command\n\
3276 to specify the program, and to load its symbol table."));
3278 add_prefix_cmd ("detach", class_run
, detach_command
, _("\
3279 Detach a process or file previously attached.\n\
3280 If a process, it is no longer traced, and it continues its execution. If\n\
3281 you were debugging a file, the file is closed and gdb no longer accesses it."),
3282 &detachlist
, "detach ", 0, &cmdlist
);
3284 add_com ("disconnect", class_run
, disconnect_command
, _("\
3285 Disconnect from a target.\n\
3286 The target will wait for another debugger to connect. Not available for\n\
3289 c
= add_com ("signal", class_run
, signal_command
, _("\
3290 Continue program with the specified signal.\n\
3291 Usage: signal SIGNAL\n\
3292 The SIGNAL argument is processed the same as the handle command.\n\
3294 An argument of \"0\" means continue the program without sending it a signal.\n\
3295 This is useful in cases where the program stopped because of a signal,\n\
3296 and you want to resume the program while discarding the signal.\n\
3298 In a multi-threaded program the signal is delivered to, or discarded from,\n\
3299 the current thread only."));
3300 set_cmd_completer (c
, signal_completer
);
3302 c
= add_com ("queue-signal", class_run
, queue_signal_command
, _("\
3303 Queue a signal to be delivered to the current thread when it is resumed.\n\
3304 Usage: queue-signal SIGNAL\n\
3305 The SIGNAL argument is processed the same as the handle command.\n\
3306 It is an error if the handling state of SIGNAL is \"nopass\".\n\
3308 An argument of \"0\" means remove any currently queued signal from\n\
3309 the current thread. This is useful in cases where the program stopped\n\
3310 because of a signal, and you want to resume it while discarding the signal.\n\
3312 In a multi-threaded program the signal is queued with, or discarded from,\n\
3313 the current thread only."));
3314 set_cmd_completer (c
, signal_completer
);
3316 add_com ("stepi", class_run
, stepi_command
, _("\
3317 Step one instruction exactly.\n\
3319 Argument N means step N times (or till program stops for another \
3321 add_com_alias ("si", "stepi", class_alias
, 0);
3323 add_com ("nexti", class_run
, nexti_command
, _("\
3324 Step one instruction, but proceed through subroutine calls.\n\
3326 Argument N means step N times (or till program stops for another \
3328 add_com_alias ("ni", "nexti", class_alias
, 0);
3330 add_com ("finish", class_run
, finish_command
, _("\
3331 Execute until selected stack frame returns.\n\
3333 Upon return, the value returned is printed and put in the value history."));
3334 add_com_alias ("fin", "finish", class_run
, 1);
3336 add_com ("next", class_run
, next_command
, _("\
3337 Step program, proceeding through subroutine calls.\n\
3339 Unlike \"step\", if the current source line calls a subroutine,\n\
3340 this command does not enter the subroutine, but instead steps over\n\
3341 the call, in effect treating it as a single source line."));
3342 add_com_alias ("n", "next", class_run
, 1);
3344 add_com ("step", class_run
, step_command
, _("\
3345 Step program until it reaches a different source line.\n\
3347 Argument N means step N times (or till program stops for another \
3349 add_com_alias ("s", "step", class_run
, 1);
3351 c
= add_com ("until", class_run
, until_command
, _("\
3352 Execute until past the current line or past a LOCATION.\n\
3353 Execute until the program reaches a source line greater than the current\n\
3354 or a specified location (same args as break command) within the current \
3356 set_cmd_completer (c
, location_completer
);
3357 add_com_alias ("u", "until", class_run
, 1);
3359 c
= add_com ("advance", class_run
, advance_command
, _("\
3360 Continue the program up to the given location (same form as args for break \
3362 Execution will also stop upon exit from the current stack frame."));
3363 set_cmd_completer (c
, location_completer
);
3365 c
= add_com ("jump", class_run
, jump_command
, _("\
3366 Continue program being debugged at specified line or address.\n\
3367 Usage: jump LOCATION\n\
3368 Give as argument either LINENUM or *ADDR, where ADDR is an expression\n\
3369 for an address to start at."));
3370 set_cmd_completer (c
, location_completer
);
3371 add_com_alias ("j", "jump", class_run
, 1);
3373 add_com ("continue", class_run
, continue_command
, _("\
3374 Continue program being debugged, after signal or breakpoint.\n\
3375 Usage: continue [N]\n\
3376 If proceeding from breakpoint, a number N may be used as an argument,\n\
3377 which means to set the ignore count of that breakpoint to N - 1 (so that\n\
3378 the breakpoint won't break until the Nth time it is reached).\n\
3380 If non-stop mode is enabled, continue only the current thread,\n\
3381 otherwise all the threads in the program are continued. To \n\
3382 continue all stopped threads in non-stop mode, use the -a option.\n\
3383 Specifying -a and an ignore count simultaneously is an error."));
3384 add_com_alias ("c", "cont", class_run
, 1);
3385 add_com_alias ("fg", "cont", class_run
, 1);
3387 c
= add_com ("run", class_run
, run_command
, _("\
3388 Start debugged program.\n"
3390 set_cmd_completer (c
, filename_completer
);
3391 add_com_alias ("r", "run", class_run
, 1);
3393 c
= add_com ("start", class_run
, start_command
, _("\
3394 Start the debugged program stopping at the beginning of the main procedure.\n"
3396 set_cmd_completer (c
, filename_completer
);
3398 c
= add_com ("starti", class_run
, starti_command
, _("\
3399 Start the debugged program stopping at the first instruction.\n"
3401 set_cmd_completer (c
, filename_completer
);
3403 add_com ("interrupt", class_run
, interrupt_command
,
3404 _("Interrupt the execution of the debugged program.\n\
3405 If non-stop mode is enabled, interrupt only the current thread,\n\
3406 otherwise all the threads in the program are stopped. To \n\
3407 interrupt all running threads in non-stop mode, use the -a option."));
3409 c
= add_info ("registers", info_registers_command
, _("\
3410 List of integer registers and their contents, for selected stack frame.\n\
3411 One or more register names as argument means describe the given registers.\n\
3412 One or more register group names as argument means describe the registers\n\
3413 in the named register groups."));
3414 add_info_alias ("r", "registers", 1);
3415 set_cmd_completer (c
, reg_or_group_completer
);
3417 c
= add_info ("all-registers", info_all_registers_command
, _("\
3418 List of all registers and their contents, for selected stack frame.\n\
3419 One or more register names as argument means describe the given registers.\n\
3420 One or more register group names as argument means describe the registers\n\
3421 in the named register groups."));
3422 set_cmd_completer (c
, reg_or_group_completer
);
3424 add_info ("program", info_program_command
,
3425 _("Execution status of the program."));
3427 add_info ("float", info_float_command
,
3428 _("Print the status of the floating point unit."));
3430 add_info ("vector", info_vector_command
,
3431 _("Print the status of the vector unit."));
3433 add_prefix_cmd ("proc", class_info
, info_proc_cmd
,
3435 Show additional information about a process.\n\
3436 Specify any process id, or use the program being debugged by default."),
3437 &info_proc_cmdlist
, "info proc ",
3438 1/*allow-unknown*/, &infolist
);
3440 add_cmd ("mappings", class_info
, info_proc_cmd_mappings
, _("\
3441 List memory regions mapped by the specified process."),
3442 &info_proc_cmdlist
);
3444 add_cmd ("stat", class_info
, info_proc_cmd_stat
, _("\
3445 List process info from /proc/PID/stat."),
3446 &info_proc_cmdlist
);
3448 add_cmd ("status", class_info
, info_proc_cmd_status
, _("\
3449 List process info from /proc/PID/status."),
3450 &info_proc_cmdlist
);
3452 add_cmd ("cwd", class_info
, info_proc_cmd_cwd
, _("\
3453 List current working directory of the specified process."),
3454 &info_proc_cmdlist
);
3456 add_cmd ("cmdline", class_info
, info_proc_cmd_cmdline
, _("\
3457 List command line arguments of the specified process."),
3458 &info_proc_cmdlist
);
3460 add_cmd ("exe", class_info
, info_proc_cmd_exe
, _("\
3461 List absolute filename for executable of the specified process."),
3462 &info_proc_cmdlist
);
3464 add_cmd ("files", class_info
, info_proc_cmd_files
, _("\
3465 List files opened by the specified process."),
3466 &info_proc_cmdlist
);
3468 add_cmd ("all", class_info
, info_proc_cmd_all
, _("\
3469 List all available info about the specified process."),
3470 &info_proc_cmdlist
);
3472 add_setshow_boolean_cmd ("finish", class_support
,
3473 &user_print_options
.finish_print
, _("\
3474 Set whether `finish' prints the return value."), _("\
3475 Show whether `finish' prints the return value."), NULL
,
3478 &setprintlist
, &showprintlist
);