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 if (startup_with_shell
)
274 /* This holds all the characters considered special to the
276 static const char special
[] = "\"!&*|[]{}<>?`~^=;, \t\n";
277 static const char quote
= '"';
279 /* This holds all the characters considered special to the
280 typical Unix shells. We include `^' because the SunOS
281 /bin/sh treats it as a synonym for `|'. */
282 static const char special
[] = "\"!#$&*()\\|[]{}<>?'`~^; \t\n";
283 static const char quote
= '\'';
289 /* We over-compute the size. It shouldn't matter. */
290 for (i
= 0; i
< argc
; ++i
)
291 length
+= 3 * strlen (argv
[i
]) + 1 + 2 * (argv
[i
][0] == '\0');
293 result
= (char *) xmalloc (length
);
296 for (i
= 0; i
< argc
; ++i
)
301 /* Need to handle empty arguments specially. */
302 if (argv
[i
][0] == '\0')
312 if (strpbrk (argv
[i
], special
))
318 for (cp
= argv
[i
]; *cp
; ++cp
)
322 /* A newline cannot be quoted with a backslash (it
323 just disappears), only by putting it inside
334 if (strchr (special
, *cp
) != NULL
)
350 /* In this case we can't handle arguments that contain spaces,
351 tabs, or newlines -- see breakup_args(). */
355 for (i
= 0; i
< argc
; ++i
)
357 char *cp
= strchr (argv
[i
], ' ');
359 cp
= strchr (argv
[i
], '\t');
361 cp
= strchr (argv
[i
], '\n');
363 error (_("can't handle command-line "
364 "argument containing whitespace"));
365 length
+= strlen (argv
[i
]) + 1;
368 result
= (char *) xmalloc (length
);
370 for (i
= 0; i
< argc
; ++i
)
373 strcat (result
, " ");
374 strcat (result
, argv
[i
]);
382 /* This function strips the '&' character (indicating background
383 execution) that is added as *the last* of the arguments ARGS of a
384 command. A copy of the incoming ARGS without the '&' is returned,
385 unless the resulting string after stripping is empty, in which case
386 NULL is returned. *BG_CHAR_P is an output boolean that indicates
387 whether the '&' character was found. */
389 static gdb::unique_xmalloc_ptr
<char>
390 strip_bg_char (const char *args
, int *bg_char_p
)
394 if (args
== NULL
|| *args
== '\0')
400 p
= args
+ strlen (args
);
404 while (p
> args
&& isspace (p
[-1]))
409 return gdb::unique_xmalloc_ptr
<char>
410 (savestring (args
, p
- args
));
412 return gdb::unique_xmalloc_ptr
<char> (nullptr);
416 return make_unique_xstrdup (args
);
419 /* Common actions to take after creating any sort of inferior, by any
420 means (running, attaching, connecting, et cetera). The target
421 should be stopped. */
424 post_create_inferior (struct target_ops
*target
, int from_tty
)
427 /* Be sure we own the terminal in case write operations are performed. */
428 target_terminal::ours_for_output ();
430 /* If the target hasn't taken care of this already, do it now.
431 Targets which need to access registers during to_open,
432 to_create_inferior, or to_attach should do it earlier; but many
434 target_find_description ();
436 /* Now that we know the register layout, retrieve current PC. But
437 if the PC is unavailable (e.g., we're opening a core file with
438 missing registers info), ignore it. */
439 thread_info
*thr
= inferior_thread ();
441 thr
->suspend
.stop_pc
= 0;
444 thr
->suspend
.stop_pc
= regcache_read_pc (get_current_regcache ());
446 catch (const gdb_exception_error
&ex
)
448 if (ex
.error
!= NOT_AVAILABLE_ERROR
)
454 const unsigned solib_add_generation
455 = current_program_space
->solib_add_generation
;
457 /* Create the hooks to handle shared library load and unload
459 solib_create_inferior_hook (from_tty
);
461 if (current_program_space
->solib_add_generation
== solib_add_generation
)
463 /* The platform-specific hook should load initial shared libraries,
464 but didn't. FROM_TTY will be incorrectly 0 but such solib
465 targets should be fixed anyway. Call it only after the solib
466 target has been initialized by solib_create_inferior_hook. */
469 warning (_("platform-specific solib_create_inferior_hook did "
470 "not load initial shared libraries."));
472 /* If the solist is global across processes, there's no need to
474 if (!gdbarch_has_global_solist (target_gdbarch ()))
475 solib_add (NULL
, 0, auto_solib_add
);
479 /* If the user sets watchpoints before execution having started,
480 then she gets software watchpoints, because GDB can't know which
481 target will end up being pushed, or if it supports hardware
482 watchpoints or not. breakpoint_re_set takes care of promoting
483 watchpoints to hardware watchpoints if possible, however, if this
484 new inferior doesn't load shared libraries or we don't pull in
485 symbols from any other source on this target/arch,
486 breakpoint_re_set is never called. Call it now so that software
487 watchpoints get a chance to be promoted to hardware watchpoints
488 if the now pushed target supports hardware watchpoints. */
489 breakpoint_re_set ();
491 gdb::observers::inferior_created
.notify (target
, from_tty
);
494 /* Kill the inferior if already running. This function is designed
495 to be called when we are about to start the execution of the program
496 from the beginning. Ask the user to confirm that he wants to restart
497 the program being debugged when FROM_TTY is non-null. */
500 kill_if_already_running (int from_tty
)
502 if (inferior_ptid
!= null_ptid
&& target_has_execution
)
504 /* Bail out before killing the program if we will not be able to
506 target_require_runnable ();
509 && !query (_("The program being debugged has been started already.\n\
510 Start it from the beginning? ")))
511 error (_("Program not restarted."));
516 /* See inferior.h. */
519 prepare_execution_command (struct target_ops
*target
, int background
)
521 /* If we get a request for running in the bg but the target
522 doesn't support it, error out. */
523 if (background
&& !target
->can_async_p ())
524 error (_("Asynchronous execution not supported on this target."));
528 /* If we get a request for running in the fg, then we need to
529 simulate synchronous (fg) execution. Note no cleanup is
530 necessary for this. stdin is re-enabled whenever an error
531 reaches the top level. */
532 all_uis_on_sync_execution_starting ();
536 /* Determine how the new inferior will behave. */
540 /* Run program without any explicit stop during startup. */
543 /* Stop at the beginning of the program's main function. */
546 /* Stop at the first instruction of the program. */
547 RUN_STOP_AT_FIRST_INSN
550 /* Implement the "run" command. Force a stop during program start if
551 requested by RUN_HOW. */
554 run_command_1 (const char *args
, int from_tty
, enum run_how run_how
)
556 const char *exec_file
;
557 struct ui_out
*uiout
= current_uiout
;
558 struct target_ops
*run_target
;
563 kill_if_already_running (from_tty
);
565 init_wait_for_inferior ();
566 clear_breakpoint_hit_counts ();
568 /* Clean up any leftovers from other runs. Some other things from
569 this function should probably be moved into target_pre_inferior. */
570 target_pre_inferior (from_tty
);
572 /* The comment here used to read, "The exec file is re-read every
573 time we do a generic_mourn_inferior, so we just have to worry
574 about the symbol file." The `generic_mourn_inferior' function
575 gets called whenever the program exits. However, suppose the
576 program exits, and *then* the executable file changes? We need
577 to check again here. Since reopen_exec_file doesn't do anything
578 if the timestamp hasn't changed, I don't see the harm. */
582 gdb::unique_xmalloc_ptr
<char> stripped
= strip_bg_char (args
, &async_exec
);
583 args
= stripped
.get ();
585 /* Do validation and preparation before possibly changing anything
588 run_target
= find_run_target ();
590 prepare_execution_command (run_target
, async_exec
);
592 if (non_stop
&& !run_target
->supports_non_stop ())
593 error (_("The target does not support running in non-stop mode."));
595 /* Done. Can now set breakpoints, change inferior args, etc. */
597 /* Insert temporary breakpoint in main function if requested. */
598 if (run_how
== RUN_STOP_AT_MAIN
)
600 std::string arg
= string_printf ("-qualified %s", main_name ());
601 tbreak_command (arg
.c_str (), 0);
604 exec_file
= get_exec_file (0);
606 /* We keep symbols from add-symbol-file, on the grounds that the
607 user might want to add some symbols before running the program
608 (right?). But sometimes (dynamic loading where the user manually
609 introduces the new symbols with add-symbol-file), the code which
610 the symbols describe does not persist between runs. Currently
611 the user has to manually nuke all symbols between runs if they
612 want them to go away (PR 2207). This is probably reasonable. */
614 /* If there were other args, beside '&', process them. */
616 set_inferior_args (args
);
620 uiout
->field_string (NULL
, "Starting program");
623 uiout
->field_string ("execfile", exec_file
);
625 /* We call get_inferior_args() because we might need to compute
627 uiout
->field_string ("infargs", get_inferior_args ());
632 /* We call get_inferior_args() because we might need to compute
634 run_target
->create_inferior (exec_file
,
635 std::string (get_inferior_args ()),
636 current_inferior ()->environment
.envp (),
638 /* to_create_inferior should push the target, so after this point we
639 shouldn't refer to run_target again. */
642 /* We're starting off a new process. When we get out of here, in
643 non-stop mode, finish the state of all threads of that process,
644 but leave other threads alone, as they may be stopped in internal
645 events --- the frontend shouldn't see them as stopped. In
646 all-stop, always finish the state of all threads, as we may be
647 resuming more than just the new process. */
648 process_stratum_target
*finish_target
;
652 finish_target
= current_inferior ()->process_target ();
653 finish_ptid
= ptid_t (current_inferior ()->pid
);
657 finish_target
= nullptr;
658 finish_ptid
= minus_one_ptid
;
660 scoped_finish_thread_state
finish_state (finish_target
, finish_ptid
);
662 /* Pass zero for FROM_TTY, because at this point the "run" command
663 has done its thing; now we are setting up the running program. */
664 post_create_inferior (current_top_target (), 0);
666 /* Queue a pending event so that the program stops immediately. */
667 if (run_how
== RUN_STOP_AT_FIRST_INSN
)
669 thread_info
*thr
= inferior_thread ();
670 thr
->suspend
.waitstatus_pending_p
= 1;
671 thr
->suspend
.waitstatus
.kind
= TARGET_WAITKIND_STOPPED
;
672 thr
->suspend
.waitstatus
.value
.sig
= GDB_SIGNAL_0
;
675 /* Start the target running. Do not use -1 continuation as it would skip
676 breakpoint right at the entry point. */
677 proceed (regcache_read_pc (get_current_regcache ()), GDB_SIGNAL_0
);
679 /* Since there was no error, there's no need to finish the thread
681 finish_state
.release ();
685 run_command (const char *args
, int from_tty
)
687 run_command_1 (args
, from_tty
, RUN_NORMAL
);
690 /* Start the execution of the program up until the beginning of the main
694 start_command (const char *args
, int from_tty
)
696 /* Some languages such as Ada need to search inside the program
697 minimal symbols for the location where to put the temporary
698 breakpoint before starting. */
699 if (!have_minimal_symbols ())
700 error (_("No symbol table loaded. Use the \"file\" command."));
702 /* Run the program until reaching the main procedure... */
703 run_command_1 (args
, from_tty
, RUN_STOP_AT_MAIN
);
706 /* Start the execution of the program stopping at the first
710 starti_command (const char *args
, int from_tty
)
712 run_command_1 (args
, from_tty
, RUN_STOP_AT_FIRST_INSN
);
716 proceed_thread_callback (struct thread_info
*thread
, void *arg
)
718 /* We go through all threads individually instead of compressing
719 into a single target `resume_all' request, because some threads
720 may be stopped in internal breakpoints/events, or stopped waiting
721 for its turn in the displaced stepping queue (that is, they are
722 running && !executing). The target side has no idea about why
723 the thread is stopped, so a `resume_all' command would resume too
724 much. If/when GDB gains a way to tell the target `hold this
725 thread stopped until I say otherwise', then we can optimize
727 if (thread
->state
!= THREAD_STOPPED
)
730 if (!thread
->inf
->has_execution ())
733 switch_to_thread (thread
);
734 clear_proceed_status (0);
735 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
740 ensure_valid_thread (void)
742 if (inferior_ptid
== null_ptid
743 || inferior_thread ()->state
== THREAD_EXITED
)
744 error (_("Cannot execute this command without a live selected thread."));
747 /* If the user is looking at trace frames, any resumption of execution
748 is likely to mix up recorded and live target data. So simply
749 disallow those commands. */
752 ensure_not_tfind_mode (void)
754 if (get_traceframe_number () >= 0)
755 error (_("Cannot execute this command while looking at trace frames."));
758 /* Throw an error indicating the current thread is running. */
761 error_is_running (void)
763 error (_("Cannot execute this command while "
764 "the selected thread is running."));
767 /* Calls error_is_running if the current thread is running. */
770 ensure_not_running (void)
772 if (inferior_thread ()->state
== THREAD_RUNNING
)
777 continue_1 (int all_threads
)
780 ensure_not_tfind_mode ();
782 if (non_stop
&& all_threads
)
784 /* Don't error out if the current thread is running, because
785 there may be other stopped threads. */
787 /* Backup current thread and selected frame and restore on scope
789 scoped_restore_current_thread restore_thread
;
791 iterate_over_threads (proceed_thread_callback
, NULL
);
793 if (current_ui
->prompt_state
== PROMPT_BLOCKED
)
795 /* If all threads in the target were already running,
796 proceed_thread_callback ends up never calling proceed,
797 and so nothing calls this to put the inferior's terminal
798 settings in effect and remove stdin from the event loop,
799 which we must when running a foreground command. E.g.:
803 <all threads are running now>
806 <no thread was resumed, but the inferior now owns the terminal>
808 target_terminal::inferior ();
813 ensure_valid_thread ();
814 ensure_not_running ();
815 clear_proceed_status (0);
816 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
820 /* continue [-a] [proceed-count] [&] */
823 continue_command (const char *args
, int from_tty
)
826 bool all_threads_p
= false;
830 /* Find out whether we must run in the background. */
831 gdb::unique_xmalloc_ptr
<char> stripped
= strip_bg_char (args
, &async_exec
);
832 args
= stripped
.get ();
836 if (startswith (args
, "-a"))
838 all_threads_p
= true;
839 args
+= sizeof ("-a") - 1;
845 if (!non_stop
&& all_threads_p
)
846 error (_("`-a' is meaningless in all-stop mode."));
848 if (args
!= NULL
&& all_threads_p
)
849 error (_("Can't resume all threads and specify "
850 "proceed count simultaneously."));
852 /* If we have an argument left, set proceed count of breakpoint we
859 struct thread_info
*tp
;
862 tp
= inferior_thread ();
865 process_stratum_target
*last_target
;
868 get_last_target_status (&last_target
, &last_ptid
, nullptr);
869 tp
= find_thread_ptid (last_target
, last_ptid
);
872 bs
= tp
->control
.stop_bpstat
;
874 while ((stat
= bpstat_num (&bs
, &num
)) != 0)
877 set_ignore_count (num
,
878 parse_and_eval_long (args
) - 1,
880 /* set_ignore_count prints a message ending with a period.
881 So print two spaces before "Continuing.". */
883 printf_filtered (" ");
887 if (!stopped
&& from_tty
)
890 ("Not stopped at any breakpoint; argument ignored.\n");
895 ensure_not_tfind_mode ();
897 if (!non_stop
|| !all_threads_p
)
899 ensure_valid_thread ();
900 ensure_not_running ();
903 prepare_execution_command (current_top_target (), async_exec
);
906 printf_filtered (_("Continuing.\n"));
908 continue_1 (all_threads_p
);
911 /* Record the starting point of a "step" or "next" command. */
914 set_step_frame (void)
916 frame_info
*frame
= get_current_frame ();
918 symtab_and_line sal
= find_frame_sal (frame
);
919 set_step_info (frame
, sal
);
921 CORE_ADDR pc
= get_frame_pc (frame
);
922 thread_info
*tp
= inferior_thread ();
923 tp
->control
.step_start_function
= find_pc_function (pc
);
926 /* Step until outside of current statement. */
929 step_command (const char *count_string
, int from_tty
)
931 step_1 (0, 0, count_string
);
934 /* Likewise, but skip over subroutine calls as if single instructions. */
937 next_command (const char *count_string
, int from_tty
)
939 step_1 (1, 0, count_string
);
942 /* Likewise, but step only one instruction. */
945 stepi_command (const char *count_string
, int from_tty
)
947 step_1 (0, 1, count_string
);
951 nexti_command (const char *count_string
, int from_tty
)
953 step_1 (1, 1, count_string
);
956 /* Data for the FSM that manages the step/next/stepi/nexti
959 struct step_command_fsm
: public thread_fsm
961 /* How many steps left in a "step N"-like command. */
964 /* If true, this is a next/nexti, otherwise a step/stepi. */
965 int skip_subroutines
;
967 /* If true, this is a stepi/nexti, otherwise a step/step. */
970 explicit step_command_fsm (struct interp
*cmd_interp
)
971 : thread_fsm (cmd_interp
)
975 void clean_up (struct thread_info
*thread
) override
;
976 bool should_stop (struct thread_info
*thread
) override
;
977 enum async_reply_reason
do_async_reply_reason () override
;
980 /* Prepare for a step/next/etc. command. Any target resource
981 allocated here is undone in the FSM's clean_up method. */
984 step_command_fsm_prepare (struct step_command_fsm
*sm
,
985 int skip_subroutines
, int single_inst
,
986 int count
, struct thread_info
*thread
)
988 sm
->skip_subroutines
= skip_subroutines
;
989 sm
->single_inst
= single_inst
;
992 /* Leave the si command alone. */
993 if (!sm
->single_inst
|| sm
->skip_subroutines
)
994 set_longjmp_breakpoint (thread
, get_frame_id (get_current_frame ()));
996 thread
->control
.stepping_command
= 1;
999 static int prepare_one_step (struct step_command_fsm
*sm
);
1002 step_1 (int skip_subroutines
, int single_inst
, const char *count_string
)
1006 struct thread_info
*thr
;
1007 struct step_command_fsm
*step_sm
;
1010 ensure_not_tfind_mode ();
1011 ensure_valid_thread ();
1012 ensure_not_running ();
1014 gdb::unique_xmalloc_ptr
<char> stripped
1015 = strip_bg_char (count_string
, &async_exec
);
1016 count_string
= stripped
.get ();
1018 prepare_execution_command (current_top_target (), async_exec
);
1020 count
= count_string
? parse_and_eval_long (count_string
) : 1;
1022 clear_proceed_status (1);
1024 /* Setup the execution command state machine to handle all the COUNT
1026 thr
= inferior_thread ();
1027 step_sm
= new step_command_fsm (command_interp ());
1028 thr
->thread_fsm
= step_sm
;
1030 step_command_fsm_prepare (step_sm
, skip_subroutines
,
1031 single_inst
, count
, thr
);
1033 /* Do only one step for now, before returning control to the event
1034 loop. Let the continuation figure out how many other steps we
1035 need to do, and handle them one at the time, through
1037 if (!prepare_one_step (step_sm
))
1038 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
1043 /* Stepped into an inline frame. Pretend that we've
1045 thr
->thread_fsm
->clean_up (thr
);
1046 proceeded
= normal_stop ();
1048 inferior_event_handler (INF_EXEC_COMPLETE
, NULL
);
1049 all_uis_check_sync_execution_done ();
1053 /* Implementation of the 'should_stop' FSM method for stepping
1054 commands. Called after we are done with one step operation, to
1055 check whether we need to step again, before we print the prompt and
1056 return control to the user. If count is > 1, returns false, as we
1057 will need to keep going. */
1060 step_command_fsm::should_stop (struct thread_info
*tp
)
1062 if (tp
->control
.stop_step
)
1064 /* There are more steps to make, and we did stop due to
1065 ending a stepping range. Do another step. */
1067 return prepare_one_step (this);
1075 /* Implementation of the 'clean_up' FSM method for stepping commands. */
1078 step_command_fsm::clean_up (struct thread_info
*thread
)
1080 if (!single_inst
|| skip_subroutines
)
1081 delete_longjmp_breakpoint (thread
->global_num
);
1084 /* Implementation of the 'async_reply_reason' FSM method for stepping
1087 enum async_reply_reason
1088 step_command_fsm::do_async_reply_reason ()
1090 return EXEC_ASYNC_END_STEPPING_RANGE
;
1093 /* Prepare for one step in "step N". The actual target resumption is
1094 done by the caller. Return true if we're done and should thus
1095 report a stop to the user. Returns false if the target needs to be
1099 prepare_one_step (struct step_command_fsm
*sm
)
1103 struct frame_info
*frame
= get_current_frame ();
1105 /* Don't assume THREAD is a valid thread id. It is set to -1 if
1106 the longjmp breakpoint was not required. Use the
1107 INFERIOR_PTID thread instead, which is the same thread when
1109 struct thread_info
*tp
= inferior_thread ();
1113 if (!sm
->single_inst
)
1117 /* Step at an inlined function behaves like "down". */
1118 if (!sm
->skip_subroutines
1119 && inline_skipped_frames (tp
))
1122 const char *fn
= NULL
;
1123 symtab_and_line sal
;
1126 /* Pretend that we've ran. */
1127 resume_ptid
= user_visible_resume_ptid (1);
1128 set_running (tp
->inf
->process_target (), resume_ptid
, true);
1130 step_into_inline_frame (tp
);
1132 frame
= get_current_frame ();
1133 sal
= find_frame_sal (frame
);
1134 sym
= get_frame_function (frame
);
1137 fn
= sym
->print_name ();
1140 || !function_name_is_marked_for_skip (fn
, sal
))
1143 return prepare_one_step (sm
);
1147 pc
= get_frame_pc (frame
);
1148 find_pc_line_pc_range (pc
,
1149 &tp
->control
.step_range_start
,
1150 &tp
->control
.step_range_end
);
1152 tp
->control
.may_range_step
= 1;
1154 /* If we have no line info, switch to stepi mode. */
1155 if (tp
->control
.step_range_end
== 0 && step_stop_if_no_debug
)
1157 tp
->control
.step_range_start
= tp
->control
.step_range_end
= 1;
1158 tp
->control
.may_range_step
= 0;
1160 else if (tp
->control
.step_range_end
== 0)
1164 if (find_pc_partial_function (pc
, &name
,
1165 &tp
->control
.step_range_start
,
1166 &tp
->control
.step_range_end
) == 0)
1167 error (_("Cannot find bounds of current function"));
1169 target_terminal::ours_for_output ();
1170 printf_filtered (_("Single stepping until exit from function %s,"
1171 "\nwhich has no line number information.\n"),
1177 /* Say we are stepping, but stop after one insn whatever it does. */
1178 tp
->control
.step_range_start
= tp
->control
.step_range_end
= 1;
1179 if (!sm
->skip_subroutines
)
1181 Don't step over function calls, not even to functions lacking
1183 tp
->control
.step_over_calls
= STEP_OVER_NONE
;
1186 if (sm
->skip_subroutines
)
1187 tp
->control
.step_over_calls
= STEP_OVER_ALL
;
1193 sm
->set_finished ();
1198 /* Continue program at specified address. */
1201 jump_command (const char *arg
, int from_tty
)
1203 struct gdbarch
*gdbarch
= get_current_arch ();
1210 ensure_not_tfind_mode ();
1211 ensure_valid_thread ();
1212 ensure_not_running ();
1214 /* Find out whether we must run in the background. */
1215 gdb::unique_xmalloc_ptr
<char> stripped
= strip_bg_char (arg
, &async_exec
);
1216 arg
= stripped
.get ();
1218 prepare_execution_command (current_top_target (), async_exec
);
1221 error_no_arg (_("starting address"));
1223 std::vector
<symtab_and_line
> sals
1224 = decode_line_with_last_displayed (arg
, DECODE_LINE_FUNFIRSTLINE
);
1225 if (sals
.size () != 1)
1226 error (_("Unreasonable jump request"));
1228 symtab_and_line
&sal
= sals
[0];
1230 if (sal
.symtab
== 0 && sal
.pc
== 0)
1231 error (_("No source file has been specified."));
1233 resolve_sal_pc (&sal
); /* May error out. */
1235 /* See if we are trying to jump to another function. */
1236 fn
= get_frame_function (get_current_frame ());
1237 sfn
= find_pc_function (sal
.pc
);
1238 if (fn
!= NULL
&& sfn
!= fn
)
1240 if (!query (_("Line %d is not in `%s'. Jump anyway? "), sal
.line
,
1243 error (_("Not confirmed."));
1250 struct obj_section
*section
;
1252 fixup_symbol_section (sfn
, 0);
1253 section
= SYMBOL_OBJ_SECTION (symbol_objfile (sfn
), sfn
);
1254 if (section_is_overlay (section
)
1255 && !section_is_mapped (section
))
1257 if (!query (_("WARNING!!! Destination is in "
1258 "unmapped overlay! Jump anyway? ")))
1260 error (_("Not confirmed."));
1270 printf_filtered (_("Continuing at "));
1271 fputs_filtered (paddress (gdbarch
, addr
), gdb_stdout
);
1272 printf_filtered (".\n");
1275 clear_proceed_status (0);
1276 proceed (addr
, GDB_SIGNAL_0
);
1279 /* Continue program giving it specified signal. */
1282 signal_command (const char *signum_exp
, int from_tty
)
1284 enum gdb_signal oursig
;
1287 dont_repeat (); /* Too dangerous. */
1289 ensure_not_tfind_mode ();
1290 ensure_valid_thread ();
1291 ensure_not_running ();
1293 /* Find out whether we must run in the background. */
1294 gdb::unique_xmalloc_ptr
<char> stripped
1295 = strip_bg_char (signum_exp
, &async_exec
);
1296 signum_exp
= stripped
.get ();
1298 prepare_execution_command (current_top_target (), async_exec
);
1301 error_no_arg (_("signal number"));
1303 /* It would be even slicker to make signal names be valid expressions,
1304 (the type could be "enum $signal" or some such), then the user could
1305 assign them to convenience variables. */
1306 oursig
= gdb_signal_from_name (signum_exp
);
1308 if (oursig
== GDB_SIGNAL_UNKNOWN
)
1310 /* No, try numeric. */
1311 int num
= parse_and_eval_long (signum_exp
);
1314 oursig
= GDB_SIGNAL_0
;
1316 oursig
= gdb_signal_from_command (num
);
1319 /* Look for threads other than the current that this command ends up
1320 resuming too (due to schedlock off), and warn if they'll get a
1321 signal delivered. "signal 0" is used to suppress a previous
1322 signal, but if the current thread is no longer the one that got
1323 the signal, then the user is potentially suppressing the signal
1324 of the wrong thread. */
1327 int must_confirm
= 0;
1329 /* This indicates what will be resumed. Either a single thread,
1330 a whole process, or all threads of all processes. */
1331 ptid_t resume_ptid
= user_visible_resume_ptid (0);
1332 process_stratum_target
*resume_target
1333 = user_visible_resume_target (resume_ptid
);
1335 thread_info
*current
= inferior_thread ();
1337 for (thread_info
*tp
: all_non_exited_threads (resume_target
, resume_ptid
))
1342 if (tp
->suspend
.stop_signal
!= GDB_SIGNAL_0
1343 && signal_pass_state (tp
->suspend
.stop_signal
))
1346 printf_unfiltered (_("Note:\n"));
1347 printf_unfiltered (_(" Thread %s previously stopped with signal %s, %s.\n"),
1348 print_thread_id (tp
),
1349 gdb_signal_to_name (tp
->suspend
.stop_signal
),
1350 gdb_signal_to_string (tp
->suspend
.stop_signal
));
1356 && !query (_("Continuing thread %s (the current thread) with specified signal will\n"
1357 "still deliver the signals noted above to their respective threads.\n"
1358 "Continue anyway? "),
1359 print_thread_id (inferior_thread ())))
1360 error (_("Not confirmed."));
1365 if (oursig
== GDB_SIGNAL_0
)
1366 printf_filtered (_("Continuing with no signal.\n"));
1368 printf_filtered (_("Continuing with signal %s.\n"),
1369 gdb_signal_to_name (oursig
));
1372 clear_proceed_status (0);
1373 proceed ((CORE_ADDR
) -1, oursig
);
1376 /* Queue a signal to be delivered to the current thread. */
1379 queue_signal_command (const char *signum_exp
, int from_tty
)
1381 enum gdb_signal oursig
;
1382 struct thread_info
*tp
;
1385 ensure_not_tfind_mode ();
1386 ensure_valid_thread ();
1387 ensure_not_running ();
1389 if (signum_exp
== NULL
)
1390 error_no_arg (_("signal number"));
1392 /* It would be even slicker to make signal names be valid expressions,
1393 (the type could be "enum $signal" or some such), then the user could
1394 assign them to convenience variables. */
1395 oursig
= gdb_signal_from_name (signum_exp
);
1397 if (oursig
== GDB_SIGNAL_UNKNOWN
)
1399 /* No, try numeric. */
1400 int num
= parse_and_eval_long (signum_exp
);
1403 oursig
= GDB_SIGNAL_0
;
1405 oursig
= gdb_signal_from_command (num
);
1408 if (oursig
!= GDB_SIGNAL_0
1409 && !signal_pass_state (oursig
))
1410 error (_("Signal handling set to not pass this signal to the program."));
1412 tp
= inferior_thread ();
1413 tp
->suspend
.stop_signal
= oursig
;
1416 /* Data for the FSM that manages the until (with no argument)
1419 struct until_next_fsm
: public thread_fsm
1421 /* The thread that as current when the command was executed. */
1424 until_next_fsm (struct interp
*cmd_interp
, int thread
)
1425 : thread_fsm (cmd_interp
),
1430 bool should_stop (struct thread_info
*thread
) override
;
1431 void clean_up (struct thread_info
*thread
) override
;
1432 enum async_reply_reason
do_async_reply_reason () override
;
1435 /* Implementation of the 'should_stop' FSM method for the until (with
1439 until_next_fsm::should_stop (struct thread_info
*tp
)
1441 if (tp
->control
.stop_step
)
1447 /* Implementation of the 'clean_up' FSM method for the until (with no
1451 until_next_fsm::clean_up (struct thread_info
*thread
)
1453 delete_longjmp_breakpoint (thread
->global_num
);
1456 /* Implementation of the 'async_reply_reason' FSM method for the until
1457 (with no arg) command. */
1459 enum async_reply_reason
1460 until_next_fsm::do_async_reply_reason ()
1462 return EXEC_ASYNC_END_STEPPING_RANGE
;
1465 /* Proceed until we reach a different source line with pc greater than
1466 our current one or exit the function. We skip calls in both cases.
1468 Note that eventually this command should probably be changed so
1469 that only source lines are printed out when we hit the breakpoint
1470 we set. This may involve changes to wait_for_inferior and the
1471 proceed status code. */
1474 until_next_command (int from_tty
)
1476 struct frame_info
*frame
;
1478 struct symbol
*func
;
1479 struct symtab_and_line sal
;
1480 struct thread_info
*tp
= inferior_thread ();
1481 int thread
= tp
->global_num
;
1482 struct until_next_fsm
*sm
;
1484 clear_proceed_status (0);
1487 frame
= get_current_frame ();
1489 /* Step until either exited from this function or greater
1490 than the current line (if in symbolic section) or pc (if
1493 pc
= get_frame_pc (frame
);
1494 func
= find_pc_function (pc
);
1498 struct bound_minimal_symbol msymbol
= lookup_minimal_symbol_by_pc (pc
);
1500 if (msymbol
.minsym
== NULL
)
1501 error (_("Execution is not within a known function."));
1503 tp
->control
.step_range_start
= BMSYMBOL_VALUE_ADDRESS (msymbol
);
1504 /* The upper-bound of step_range is exclusive. In order to make PC
1505 within the range, set the step_range_end with PC + 1. */
1506 tp
->control
.step_range_end
= pc
+ 1;
1510 sal
= find_pc_line (pc
, 0);
1512 tp
->control
.step_range_start
= BLOCK_ENTRY_PC (SYMBOL_BLOCK_VALUE (func
));
1513 tp
->control
.step_range_end
= sal
.end
;
1515 tp
->control
.may_range_step
= 1;
1517 tp
->control
.step_over_calls
= STEP_OVER_ALL
;
1519 set_longjmp_breakpoint (tp
, get_frame_id (frame
));
1520 delete_longjmp_breakpoint_cleanup
lj_deleter (thread
);
1522 sm
= new until_next_fsm (command_interp (), tp
->global_num
);
1523 tp
->thread_fsm
= sm
;
1524 lj_deleter
.release ();
1526 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
1530 until_command (const char *arg
, int from_tty
)
1535 ensure_not_tfind_mode ();
1536 ensure_valid_thread ();
1537 ensure_not_running ();
1539 /* Find out whether we must run in the background. */
1540 gdb::unique_xmalloc_ptr
<char> stripped
= strip_bg_char (arg
, &async_exec
);
1541 arg
= stripped
.get ();
1543 prepare_execution_command (current_top_target (), async_exec
);
1546 until_break_command (arg
, from_tty
, 0);
1548 until_next_command (from_tty
);
1552 advance_command (const char *arg
, int from_tty
)
1557 ensure_not_tfind_mode ();
1558 ensure_valid_thread ();
1559 ensure_not_running ();
1562 error_no_arg (_("a location"));
1564 /* Find out whether we must run in the background. */
1565 gdb::unique_xmalloc_ptr
<char> stripped
= strip_bg_char (arg
, &async_exec
);
1566 arg
= stripped
.get ();
1568 prepare_execution_command (current_top_target (), async_exec
);
1570 until_break_command (arg
, from_tty
, 1);
1573 /* Return the value of the result of a function at the end of a 'finish'
1574 command/BP. DTOR_DATA (if not NULL) can represent inferior registers
1575 right after an inferior call has finished. */
1578 get_return_value (struct value
*function
, struct type
*value_type
)
1580 regcache
*stop_regs
= get_current_regcache ();
1581 struct gdbarch
*gdbarch
= stop_regs
->arch ();
1582 struct value
*value
;
1584 value_type
= check_typedef (value_type
);
1585 gdb_assert (TYPE_CODE (value_type
) != TYPE_CODE_VOID
);
1587 /* FIXME: 2003-09-27: When returning from a nested inferior function
1588 call, it's possible (with no help from the architecture vector)
1589 to locate and return/print a "struct return" value. This is just
1590 a more complicated case of what is already being done in the
1591 inferior function call code. In fact, when inferior function
1592 calls are made async, this will likely be made the norm. */
1594 switch (gdbarch_return_value (gdbarch
, function
, value_type
,
1597 case RETURN_VALUE_REGISTER_CONVENTION
:
1598 case RETURN_VALUE_ABI_RETURNS_ADDRESS
:
1599 case RETURN_VALUE_ABI_PRESERVES_ADDRESS
:
1600 value
= allocate_value (value_type
);
1601 gdbarch_return_value (gdbarch
, function
, value_type
, stop_regs
,
1602 value_contents_raw (value
), NULL
);
1604 case RETURN_VALUE_STRUCT_CONVENTION
:
1608 internal_error (__FILE__
, __LINE__
, _("bad switch"));
1614 /* The captured function return value/type and its position in the
1617 struct return_value_info
1619 /* The captured return value. May be NULL if we weren't able to
1620 retrieve it. See get_return_value. */
1621 struct value
*value
;
1623 /* The return type. In some cases, we'll not be able extract the
1624 return value, but we always know the type. */
1627 /* If we captured a value, this is the value history index. */
1628 int value_history_index
;
1631 /* Helper for print_return_value. */
1634 print_return_value_1 (struct ui_out
*uiout
, struct return_value_info
*rv
)
1636 if (rv
->value
!= NULL
)
1638 struct value_print_options opts
;
1641 uiout
->text ("Value returned is ");
1642 uiout
->field_fmt ("gdb-result-var", "$%d",
1643 rv
->value_history_index
);
1644 uiout
->text (" = ");
1645 get_user_print_options (&opts
);
1647 if (opts
.finish_print
)
1650 value_print (rv
->value
, &stb
, &opts
);
1651 uiout
->field_stream ("return-value", stb
);
1654 uiout
->field_string ("return-value", _("<not displayed>"),
1655 metadata_style
.style ());
1660 std::string type_name
= type_to_string (rv
->type
);
1661 uiout
->text ("Value returned has type: ");
1662 uiout
->field_string ("return-type", type_name
.c_str ());
1664 uiout
->text (" Cannot determine contents\n");
1668 /* Print the result of a function at the end of a 'finish' command.
1669 RV points at an object representing the captured return value/type
1670 and its position in the value history. */
1673 print_return_value (struct ui_out
*uiout
, struct return_value_info
*rv
)
1675 if (rv
->type
== NULL
1676 || TYPE_CODE (check_typedef (rv
->type
)) == TYPE_CODE_VOID
)
1681 /* print_return_value_1 can throw an exception in some
1682 circumstances. We need to catch this so that we still
1683 delete the breakpoint. */
1684 print_return_value_1 (uiout
, rv
);
1686 catch (const gdb_exception
&ex
)
1688 exception_print (gdb_stdout
, ex
);
1692 /* Data for the FSM that manages the finish command. */
1694 struct finish_command_fsm
: public thread_fsm
1696 /* The momentary breakpoint set at the function's return address in
1698 breakpoint_up breakpoint
;
1700 /* The function that we're stepping out of. */
1701 struct symbol
*function
= nullptr;
1703 /* If the FSM finishes successfully, this stores the function's
1705 struct return_value_info return_value_info
{};
1707 explicit finish_command_fsm (struct interp
*cmd_interp
)
1708 : thread_fsm (cmd_interp
)
1712 bool should_stop (struct thread_info
*thread
) override
;
1713 void clean_up (struct thread_info
*thread
) override
;
1714 struct return_value_info
*return_value () override
;
1715 enum async_reply_reason
do_async_reply_reason () override
;
1718 /* Implementation of the 'should_stop' FSM method for the finish
1719 commands. Detects whether the thread stepped out of the function
1720 successfully, and if so, captures the function's return value and
1721 marks the FSM finished. */
1724 finish_command_fsm::should_stop (struct thread_info
*tp
)
1726 struct return_value_info
*rv
= &return_value_info
;
1728 if (function
!= NULL
1729 && bpstat_find_breakpoint (tp
->control
.stop_bpstat
,
1730 breakpoint
.get ()) != NULL
)
1735 rv
->type
= TYPE_TARGET_TYPE (SYMBOL_TYPE (function
));
1736 if (rv
->type
== NULL
)
1737 internal_error (__FILE__
, __LINE__
,
1738 _("finish_command: function has no target type"));
1740 if (TYPE_CODE (check_typedef (rv
->type
)) != TYPE_CODE_VOID
)
1744 func
= read_var_value (function
, NULL
, get_current_frame ());
1745 rv
->value
= get_return_value (func
, rv
->type
);
1746 if (rv
->value
!= NULL
)
1747 rv
->value_history_index
= record_latest_value (rv
->value
);
1750 else if (tp
->control
.stop_step
)
1752 /* Finishing from an inline frame, or reverse finishing. In
1753 either case, there's no way to retrieve the return value. */
1760 /* Implementation of the 'clean_up' FSM method for the finish
1764 finish_command_fsm::clean_up (struct thread_info
*thread
)
1766 breakpoint
.reset ();
1767 delete_longjmp_breakpoint (thread
->global_num
);
1770 /* Implementation of the 'return_value' FSM method for the finish
1773 struct return_value_info
*
1774 finish_command_fsm::return_value ()
1776 return &return_value_info
;
1779 /* Implementation of the 'async_reply_reason' FSM method for the
1782 enum async_reply_reason
1783 finish_command_fsm::do_async_reply_reason ()
1785 if (execution_direction
== EXEC_REVERSE
)
1786 return EXEC_ASYNC_END_STEPPING_RANGE
;
1788 return EXEC_ASYNC_FUNCTION_FINISHED
;
1791 /* finish_backward -- helper function for finish_command. */
1794 finish_backward (struct finish_command_fsm
*sm
)
1796 struct symtab_and_line sal
;
1797 struct thread_info
*tp
= inferior_thread ();
1799 CORE_ADDR func_addr
;
1801 pc
= get_frame_pc (get_current_frame ());
1803 if (find_pc_partial_function (pc
, NULL
, &func_addr
, NULL
) == 0)
1804 error (_("Cannot find bounds of current function"));
1806 sal
= find_pc_line (func_addr
, 0);
1808 tp
->control
.proceed_to_finish
= 1;
1809 /* Special case: if we're sitting at the function entry point,
1810 then all we need to do is take a reverse singlestep. We
1811 don't need to set a breakpoint, and indeed it would do us
1814 Note that this can only happen at frame #0, since there's
1815 no way that a function up the stack can have a return address
1816 that's equal to its entry point. */
1820 struct frame_info
*frame
= get_selected_frame (NULL
);
1821 struct gdbarch
*gdbarch
= get_frame_arch (frame
);
1823 /* Set a step-resume at the function's entry point. Once that's
1824 hit, we'll do one more step backwards. */
1825 symtab_and_line sr_sal
;
1827 sr_sal
.pspace
= get_frame_program_space (frame
);
1828 insert_step_resume_breakpoint_at_sal (gdbarch
,
1829 sr_sal
, null_frame_id
);
1831 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
1835 /* We're almost there -- we just need to back up by one more
1837 tp
->control
.step_range_start
= tp
->control
.step_range_end
= 1;
1838 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
1842 /* finish_forward -- helper function for finish_command. FRAME is the
1843 frame that called the function we're about to step out of. */
1846 finish_forward (struct finish_command_fsm
*sm
, struct frame_info
*frame
)
1848 struct frame_id frame_id
= get_frame_id (frame
);
1849 struct gdbarch
*gdbarch
= get_frame_arch (frame
);
1850 struct symtab_and_line sal
;
1851 struct thread_info
*tp
= inferior_thread ();
1853 sal
= find_pc_line (get_frame_pc (frame
), 0);
1854 sal
.pc
= get_frame_pc (frame
);
1856 sm
->breakpoint
= set_momentary_breakpoint (gdbarch
, sal
,
1857 get_stack_frame_id (frame
),
1860 /* set_momentary_breakpoint invalidates FRAME. */
1863 set_longjmp_breakpoint (tp
, frame_id
);
1865 /* We want to print return value, please... */
1866 tp
->control
.proceed_to_finish
= 1;
1868 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
1871 /* Skip frames for "finish". */
1873 static struct frame_info
*
1874 skip_finish_frames (struct frame_info
*frame
)
1876 struct frame_info
*start
;
1882 frame
= skip_tailcall_frames (frame
);
1886 frame
= skip_unwritable_frames (frame
);
1890 while (start
!= frame
);
1895 /* "finish": Set a temporary breakpoint at the place the selected
1896 frame will return to, then continue. */
1899 finish_command (const char *arg
, int from_tty
)
1901 struct frame_info
*frame
;
1903 struct finish_command_fsm
*sm
;
1904 struct thread_info
*tp
;
1907 ensure_not_tfind_mode ();
1908 ensure_valid_thread ();
1909 ensure_not_running ();
1911 /* Find out whether we must run in the background. */
1912 gdb::unique_xmalloc_ptr
<char> stripped
= strip_bg_char (arg
, &async_exec
);
1913 arg
= stripped
.get ();
1915 prepare_execution_command (current_top_target (), async_exec
);
1918 error (_("The \"finish\" command does not take any arguments."));
1920 frame
= get_prev_frame (get_selected_frame (_("No selected frame.")));
1922 error (_("\"finish\" not meaningful in the outermost frame."));
1924 clear_proceed_status (0);
1926 tp
= inferior_thread ();
1928 sm
= new finish_command_fsm (command_interp ());
1930 tp
->thread_fsm
= sm
;
1932 /* Finishing from an inline frame is completely different. We don't
1933 try to show the "return value" - no way to locate it. */
1934 if (get_frame_type (get_selected_frame (_("No selected frame.")))
1937 /* Claim we are stepping in the calling frame. An empty step
1938 range means that we will stop once we aren't in a function
1939 called by that frame. We don't use the magic "1" value for
1940 step_range_end, because then infrun will think this is nexti,
1941 and not step over the rest of this inlined function call. */
1942 set_step_info (frame
, {});
1943 tp
->control
.step_range_start
= get_frame_pc (frame
);
1944 tp
->control
.step_range_end
= tp
->control
.step_range_start
;
1945 tp
->control
.step_over_calls
= STEP_OVER_ALL
;
1947 /* Print info on the selected frame, including level number but not
1951 printf_filtered (_("Run till exit from "));
1952 print_stack_frame (get_selected_frame (NULL
), 1, LOCATION
, 0);
1955 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
1959 /* Find the function we will return from. */
1961 sm
->function
= find_pc_function (get_frame_pc (get_selected_frame (NULL
)));
1963 /* Print info on the selected frame, including level number but not
1967 if (execution_direction
== EXEC_REVERSE
)
1968 printf_filtered (_("Run back to call of "));
1971 if (sm
->function
!= NULL
&& TYPE_NO_RETURN (sm
->function
->type
)
1972 && !query (_("warning: Function %s does not return normally.\n"
1973 "Try to finish anyway? "),
1974 sm
->function
->print_name ()))
1975 error (_("Not confirmed."));
1976 printf_filtered (_("Run till exit from "));
1979 print_stack_frame (get_selected_frame (NULL
), 1, LOCATION
, 0);
1982 if (execution_direction
== EXEC_REVERSE
)
1983 finish_backward (sm
);
1986 frame
= skip_finish_frames (frame
);
1989 error (_("Cannot find the caller frame."));
1991 finish_forward (sm
, frame
);
1997 info_program_command (const char *args
, int from_tty
)
2002 process_stratum_target
*proc_target
;
2004 if (!target_has_execution
)
2006 printf_filtered (_("The program being debugged is not being run.\n"));
2012 ptid
= inferior_ptid
;
2013 proc_target
= current_inferior ()->process_target ();
2016 get_last_target_status (&proc_target
, &ptid
, nullptr);
2018 if (ptid
== null_ptid
|| ptid
== minus_one_ptid
)
2019 error (_("No selected thread."));
2021 thread_info
*tp
= find_thread_ptid (proc_target
, ptid
);
2023 if (tp
->state
== THREAD_EXITED
)
2024 error (_("Invalid selected thread."));
2025 else if (tp
->state
== THREAD_RUNNING
)
2026 error (_("Selected thread is running."));
2028 bs
= tp
->control
.stop_bpstat
;
2029 stat
= bpstat_num (&bs
, &num
);
2031 target_files_info ();
2032 printf_filtered (_("Program stopped at %s.\n"),
2033 paddress (target_gdbarch (), tp
->suspend
.stop_pc
));
2034 if (tp
->control
.stop_step
)
2035 printf_filtered (_("It stopped after being stepped.\n"));
2038 /* There may be several breakpoints in the same place, so this
2039 isn't as strange as it seems. */
2044 printf_filtered (_("It stopped at a breakpoint "
2045 "that has since been deleted.\n"));
2048 printf_filtered (_("It stopped at breakpoint %d.\n"), num
);
2049 stat
= bpstat_num (&bs
, &num
);
2052 else if (tp
->suspend
.stop_signal
!= GDB_SIGNAL_0
)
2054 printf_filtered (_("It stopped with signal %s, %s.\n"),
2055 gdb_signal_to_name (tp
->suspend
.stop_signal
),
2056 gdb_signal_to_string (tp
->suspend
.stop_signal
));
2061 printf_filtered (_("Type \"info stack\" or \"info "
2062 "registers\" for more information.\n"));
2067 environment_info (const char *var
, int from_tty
)
2071 const char *val
= current_inferior ()->environment
.get (var
);
2075 puts_filtered (var
);
2076 puts_filtered (" = ");
2077 puts_filtered (val
);
2078 puts_filtered ("\n");
2082 puts_filtered ("Environment variable \"");
2083 puts_filtered (var
);
2084 puts_filtered ("\" not defined.\n");
2089 char **envp
= current_inferior ()->environment
.envp ();
2091 for (int idx
= 0; envp
[idx
] != NULL
; ++idx
)
2093 puts_filtered (envp
[idx
]);
2094 puts_filtered ("\n");
2100 set_environment_command (const char *arg
, int from_tty
)
2102 const char *p
, *val
;
2106 error_no_arg (_("environment variable and value"));
2108 /* Find separation between variable name and value. */
2109 p
= (char *) strchr (arg
, '=');
2110 val
= (char *) strchr (arg
, ' ');
2112 if (p
!= 0 && val
!= 0)
2114 /* We have both a space and an equals. If the space is before the
2115 equals, walk forward over the spaces til we see a nonspace
2116 (possibly the equals). */
2121 /* Now if the = is after the char following the spaces,
2122 take the char following the spaces. */
2126 else if (val
!= 0 && p
== 0)
2130 error_no_arg (_("environment variable to set"));
2132 if (p
== 0 || p
[1] == 0)
2136 p
= arg
+ strlen (arg
); /* So that savestring below will work. */
2140 /* Not setting variable value to null. */
2142 while (*val
== ' ' || *val
== '\t')
2146 while (p
!= arg
&& (p
[-1] == ' ' || p
[-1] == '\t'))
2149 std::string
var (arg
, p
- arg
);
2152 printf_filtered (_("Setting environment variable "
2153 "\"%s\" to null value.\n"),
2155 current_inferior ()->environment
.set (var
.c_str (), "");
2158 current_inferior ()->environment
.set (var
.c_str (), val
);
2162 unset_environment_command (const char *var
, int from_tty
)
2166 /* If there is no argument, delete all environment variables.
2167 Ask for confirmation if reading from the terminal. */
2168 if (!from_tty
|| query (_("Delete all environment variables? ")))
2169 current_inferior ()->environment
.clear ();
2172 current_inferior ()->environment
.unset (var
);
2175 /* Handle the execution path (PATH variable). */
2177 static const char path_var_name
[] = "PATH";
2180 path_info (const char *args
, int from_tty
)
2182 puts_filtered ("Executable and object file path: ");
2183 puts_filtered (current_inferior ()->environment
.get (path_var_name
));
2184 puts_filtered ("\n");
2187 /* Add zero or more directories to the front of the execution path. */
2190 path_command (const char *dirname
, int from_tty
)
2196 env
= current_inferior ()->environment
.get (path_var_name
);
2197 /* Can be null if path is not set. */
2200 exec_path
= xstrdup (env
);
2201 mod_path (dirname
, &exec_path
);
2202 current_inferior ()->environment
.set (path_var_name
, exec_path
);
2205 path_info (NULL
, from_tty
);
2210 pad_to_column (string_file
&stream
, int col
)
2212 /* At least one space must be printed to separate columns. */
2214 const int size
= stream
.size ();
2216 stream
.puts (n_spaces (col
- size
));
2219 /* Print out the register NAME with value VAL, to FILE, in the default
2223 default_print_one_register_info (struct ui_file
*file
,
2227 struct type
*regtype
= value_type (val
);
2228 int print_raw_format
;
2229 string_file format_stream
;
2232 value_column_1
= 15,
2233 /* Give enough room for "0x", 16 hex digits and two spaces in
2234 preceding column. */
2235 value_column_2
= value_column_1
+ 2 + 16 + 2,
2238 format_stream
.puts (name
);
2239 pad_to_column (format_stream
, value_column_1
);
2241 print_raw_format
= (value_entirely_available (val
)
2242 && !value_optimized_out (val
));
2244 /* If virtual format is floating, print it that way, and in raw
2246 if (TYPE_CODE (regtype
) == TYPE_CODE_FLT
2247 || TYPE_CODE (regtype
) == TYPE_CODE_DECFLOAT
)
2249 struct value_print_options opts
;
2250 const gdb_byte
*valaddr
= value_contents_for_printing (val
);
2251 enum bfd_endian byte_order
= type_byte_order (regtype
);
2253 get_user_print_options (&opts
);
2257 value_embedded_offset (val
), 0,
2258 &format_stream
, 0, val
, &opts
, current_language
);
2260 if (print_raw_format
)
2262 pad_to_column (format_stream
, value_column_2
);
2263 format_stream
.puts ("(raw ");
2264 print_hex_chars (&format_stream
, valaddr
, TYPE_LENGTH (regtype
),
2266 format_stream
.putc (')');
2271 struct value_print_options opts
;
2273 /* Print the register in hex. */
2274 get_formatted_print_options (&opts
, 'x');
2277 value_embedded_offset (val
), 0,
2278 &format_stream
, 0, val
, &opts
, current_language
);
2279 /* If not a vector register, print it also according to its
2281 if (print_raw_format
&& TYPE_VECTOR (regtype
) == 0)
2283 pad_to_column (format_stream
, value_column_2
);
2284 get_user_print_options (&opts
);
2287 value_embedded_offset (val
), 0,
2288 &format_stream
, 0, val
, &opts
, current_language
);
2292 fputs_filtered (format_stream
.c_str (), file
);
2293 fprintf_filtered (file
, "\n");
2296 /* Print out the machine register regnum. If regnum is -1, print all
2297 registers (print_all == 1) or all non-float and non-vector
2298 registers (print_all == 0).
2300 For most machines, having all_registers_info() print the
2301 register(s) one per line is good enough. If a different format is
2302 required, (eg, for MIPS or Pyramid 90x, which both have lots of
2303 regs), or there is an existing convention for showing all the
2304 registers, define the architecture method PRINT_REGISTERS_INFO to
2305 provide that format. */
2308 default_print_registers_info (struct gdbarch
*gdbarch
,
2309 struct ui_file
*file
,
2310 struct frame_info
*frame
,
2311 int regnum
, int print_all
)
2314 const int numregs
= gdbarch_num_cooked_regs (gdbarch
);
2316 for (i
= 0; i
< numregs
; i
++)
2318 /* Decide between printing all regs, non-float / vector regs, or
2324 if (!gdbarch_register_reggroup_p (gdbarch
, i
, all_reggroup
))
2329 if (!gdbarch_register_reggroup_p (gdbarch
, i
, general_reggroup
))
2339 /* If the register name is empty, it is undefined for this
2340 processor, so don't display anything. */
2341 if (gdbarch_register_name (gdbarch
, i
) == NULL
2342 || *(gdbarch_register_name (gdbarch
, i
)) == '\0')
2345 default_print_one_register_info (file
,
2346 gdbarch_register_name (gdbarch
, i
),
2347 value_of_register (i
, frame
));
2352 registers_info (const char *addr_exp
, int fpregs
)
2354 struct frame_info
*frame
;
2355 struct gdbarch
*gdbarch
;
2357 if (!target_has_registers
)
2358 error (_("The program has no registers now."));
2359 frame
= get_selected_frame (NULL
);
2360 gdbarch
= get_frame_arch (frame
);
2364 gdbarch_print_registers_info (gdbarch
, gdb_stdout
,
2369 while (*addr_exp
!= '\0')
2374 /* Skip leading white space. */
2375 addr_exp
= skip_spaces (addr_exp
);
2377 /* Discard any leading ``$''. Check that there is something
2378 resembling a register following it. */
2379 if (addr_exp
[0] == '$')
2381 if (isspace ((*addr_exp
)) || (*addr_exp
) == '\0')
2382 error (_("Missing register name"));
2384 /* Find the start/end of this register name/num/group. */
2386 while ((*addr_exp
) != '\0' && !isspace ((*addr_exp
)))
2390 /* Figure out what we've found and display it. */
2392 /* A register name? */
2394 int regnum
= user_reg_map_name_to_regnum (gdbarch
, start
, end
- start
);
2398 /* User registers lie completely outside of the range of
2399 normal registers. Catch them early so that the target
2401 if (regnum
>= gdbarch_num_cooked_regs (gdbarch
))
2403 struct value
*regval
= value_of_user_reg (regnum
, frame
);
2404 const char *regname
= user_reg_map_regnum_to_name (gdbarch
,
2407 /* Print in the same fashion
2408 gdbarch_print_registers_info's default
2409 implementation prints. */
2410 default_print_one_register_info (gdb_stdout
,
2415 gdbarch_print_registers_info (gdbarch
, gdb_stdout
,
2416 frame
, regnum
, fpregs
);
2421 /* A register group? */
2423 struct reggroup
*group
;
2425 for (group
= reggroup_next (gdbarch
, NULL
);
2427 group
= reggroup_next (gdbarch
, group
))
2429 /* Don't bother with a length check. Should the user
2430 enter a short register group name, go with the first
2431 group that matches. */
2432 if (strncmp (start
, reggroup_name (group
), end
- start
) == 0)
2440 regnum
< gdbarch_num_cooked_regs (gdbarch
);
2443 if (gdbarch_register_reggroup_p (gdbarch
, regnum
, group
))
2444 gdbarch_print_registers_info (gdbarch
,
2452 /* Nothing matched. */
2453 error (_("Invalid register `%.*s'"), (int) (end
- start
), start
);
2458 info_all_registers_command (const char *addr_exp
, int from_tty
)
2460 registers_info (addr_exp
, 1);
2464 info_registers_command (const char *addr_exp
, int from_tty
)
2466 registers_info (addr_exp
, 0);
2470 print_vector_info (struct ui_file
*file
,
2471 struct frame_info
*frame
, const char *args
)
2473 struct gdbarch
*gdbarch
= get_frame_arch (frame
);
2475 if (gdbarch_print_vector_info_p (gdbarch
))
2476 gdbarch_print_vector_info (gdbarch
, file
, frame
, args
);
2480 int printed_something
= 0;
2482 for (regnum
= 0; regnum
< gdbarch_num_cooked_regs (gdbarch
); regnum
++)
2484 if (gdbarch_register_reggroup_p (gdbarch
, regnum
, vector_reggroup
))
2486 printed_something
= 1;
2487 gdbarch_print_registers_info (gdbarch
, file
, frame
, regnum
, 1);
2490 if (!printed_something
)
2491 fprintf_filtered (file
, "No vector information\n");
2496 info_vector_command (const char *args
, int from_tty
)
2498 if (!target_has_registers
)
2499 error (_("The program has no registers now."));
2501 print_vector_info (gdb_stdout
, get_selected_frame (NULL
), args
);
2504 /* Kill the inferior process. Make us have no inferior. */
2507 kill_command (const char *arg
, int from_tty
)
2509 /* FIXME: This should not really be inferior_ptid (or target_has_execution).
2510 It should be a distinct flag that indicates that a target is active, cuz
2511 some targets don't have processes! */
2513 if (inferior_ptid
== null_ptid
)
2514 error (_("The program is not being run."));
2515 if (!query (_("Kill the program being debugged? ")))
2516 error (_("Not confirmed."));
2518 int pid
= current_inferior ()->pid
;
2519 /* Save the pid as a string before killing the inferior, since that
2520 may unpush the current target, and we need the string after. */
2521 std::string pid_str
= target_pid_to_str (ptid_t (pid
));
2522 int infnum
= current_inferior ()->num
;
2526 if (print_inferior_events
)
2527 printf_unfiltered (_("[Inferior %d (%s) killed]\n"),
2528 infnum
, pid_str
.c_str ());
2530 bfd_cache_close_all ();
2533 /* Used in `attach&' command. Proceed threads of inferior INF iff
2534 they stopped due to debugger request, and when they did, they
2535 reported a clean stop (GDB_SIGNAL_0). Do not proceed threads that
2536 have been explicitly been told to stop. */
2539 proceed_after_attach (inferior
*inf
)
2541 /* Don't error out if the current thread is running, because
2542 there may be other stopped threads. */
2544 /* Backup current thread and selected frame. */
2545 scoped_restore_current_thread restore_thread
;
2547 for (thread_info
*thread
: inf
->non_exited_threads ())
2548 if (!thread
->executing
2549 && !thread
->stop_requested
2550 && thread
->suspend
.stop_signal
== GDB_SIGNAL_0
)
2552 switch_to_thread (thread
);
2553 clear_proceed_status (0);
2554 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
2558 /* See inferior.h. */
2561 setup_inferior (int from_tty
)
2563 struct inferior
*inferior
;
2565 inferior
= current_inferior ();
2566 inferior
->needs_setup
= 0;
2568 /* If no exec file is yet known, try to determine it from the
2570 if (get_exec_file (0) == NULL
)
2571 exec_file_locate_attach (inferior_ptid
.pid (), 1, from_tty
);
2574 reopen_exec_file ();
2578 /* Take any necessary post-attaching actions for this platform. */
2579 target_post_attach (inferior_ptid
.pid ());
2581 post_create_inferior (current_top_target (), from_tty
);
2584 /* What to do after the first program stops after attaching. */
2585 enum attach_post_wait_mode
2587 /* Do nothing. Leaves threads as they are. */
2588 ATTACH_POST_WAIT_NOTHING
,
2590 /* Re-resume threads that are marked running. */
2591 ATTACH_POST_WAIT_RESUME
,
2593 /* Stop all threads. */
2594 ATTACH_POST_WAIT_STOP
,
2597 /* Called after we've attached to a process and we've seen it stop for
2598 the first time. If ASYNC_EXEC is true, re-resume threads that
2599 should be running. Else if ATTACH, */
2602 attach_post_wait (const char *args
, int from_tty
, enum attach_post_wait_mode mode
)
2604 struct inferior
*inferior
;
2606 inferior
= current_inferior ();
2607 inferior
->control
.stop_soon
= NO_STOP_QUIETLY
;
2609 if (inferior
->needs_setup
)
2610 setup_inferior (from_tty
);
2612 if (mode
== ATTACH_POST_WAIT_RESUME
)
2614 /* The user requested an `attach&', so be sure to leave threads
2615 that didn't get a signal running. */
2617 /* Immediatelly resume all suspended threads of this inferior,
2618 and this inferior only. This should have no effect on
2619 already running threads. If a thread has been stopped with a
2620 signal, leave it be. */
2622 proceed_after_attach (inferior
);
2625 if (inferior_thread ()->suspend
.stop_signal
== GDB_SIGNAL_0
)
2627 clear_proceed_status (0);
2628 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
2632 else if (mode
== ATTACH_POST_WAIT_STOP
)
2634 /* The user requested a plain `attach', so be sure to leave
2635 the inferior stopped. */
2637 /* At least the current thread is already stopped. */
2639 /* In all-stop, by definition, all threads have to be already
2640 stopped at this point. In non-stop, however, although the
2641 selected thread is stopped, others may still be executing.
2642 Be sure to explicitly stop all threads of the process. This
2643 should have no effect on already stopped threads. */
2645 target_stop (ptid_t (inferior
->pid
));
2646 else if (target_is_non_stop_p ())
2648 struct thread_info
*lowest
= inferior_thread ();
2650 stop_all_threads ();
2652 /* It's not defined which thread will report the attach
2653 stop. For consistency, always select the thread with
2654 lowest GDB number, which should be the main thread, if it
2656 for (thread_info
*thread
: current_inferior ()->non_exited_threads ())
2657 if (thread
->inf
->num
< lowest
->inf
->num
2658 || thread
->per_inf_num
< lowest
->per_inf_num
)
2661 switch_to_thread (lowest
);
2664 /* Tell the user/frontend where we're stopped. */
2666 if (deprecated_attach_hook
)
2667 deprecated_attach_hook ();
2671 struct attach_command_continuation_args
2675 enum attach_post_wait_mode mode
;
2679 attach_command_continuation (void *args
, int err
)
2681 struct attach_command_continuation_args
*a
2682 = (struct attach_command_continuation_args
*) args
;
2687 attach_post_wait (a
->args
, a
->from_tty
, a
->mode
);
2691 attach_command_continuation_free_args (void *args
)
2693 struct attach_command_continuation_args
*a
2694 = (struct attach_command_continuation_args
*) args
;
2700 /* "attach" command entry point. Takes a program started up outside
2701 of gdb and ``attaches'' to it. This stops it cold in its tracks
2702 and allows us to start debugging it. */
2705 attach_command (const char *args
, int from_tty
)
2708 struct target_ops
*attach_target
;
2709 struct inferior
*inferior
= current_inferior ();
2710 enum attach_post_wait_mode mode
;
2712 dont_repeat (); /* Not for the faint of heart */
2714 if (gdbarch_has_global_solist (target_gdbarch ()))
2715 /* Don't complain if all processes share the same symbol
2718 else if (target_has_execution
)
2720 if (query (_("A program is being debugged already. Kill it? ")))
2723 error (_("Not killed."));
2726 /* Clean up any leftovers from other runs. Some other things from
2727 this function should probably be moved into target_pre_inferior. */
2728 target_pre_inferior (from_tty
);
2730 gdb::unique_xmalloc_ptr
<char> stripped
= strip_bg_char (args
, &async_exec
);
2731 args
= stripped
.get ();
2733 attach_target
= find_attach_target ();
2735 prepare_execution_command (attach_target
, async_exec
);
2737 if (non_stop
&& !attach_target
->supports_non_stop ())
2738 error (_("Cannot attach to this target in non-stop mode"));
2740 attach_target
->attach (args
, from_tty
);
2741 /* to_attach should push the target, so after this point we
2742 shouldn't refer to attach_target again. */
2743 attach_target
= NULL
;
2745 /* Set up the "saved terminal modes" of the inferior
2746 based on what modes we are starting it with. */
2747 target_terminal::init ();
2749 /* Install inferior's terminal modes. This may look like a no-op,
2750 as we've just saved them above, however, this does more than
2751 restore terminal settings:
2753 - installs a SIGINT handler that forwards SIGINT to the inferior.
2754 Otherwise a Ctrl-C pressed just while waiting for the initial
2755 stop would end up as a spurious Quit.
2757 - removes stdin from the event loop, which we need if attaching
2758 in the foreground, otherwise on targets that report an initial
2759 stop on attach (which are most) we'd process input/commands
2760 while we're in the event loop waiting for that stop. That is,
2761 before the attach continuation runs and the command is really
2763 target_terminal::inferior ();
2765 /* Set up execution context to know that we should return from
2766 wait_for_inferior as soon as the target reports a stop. */
2767 init_wait_for_inferior ();
2768 clear_proceed_status (0);
2770 inferior
->needs_setup
= 1;
2772 if (target_is_non_stop_p ())
2774 /* If we find that the current thread isn't stopped, explicitly
2775 do so now, because we're going to install breakpoints and
2779 /* The user requested an `attach&'; stop just one thread. */
2780 target_stop (inferior_ptid
);
2782 /* The user requested an `attach', so stop all threads of this
2784 target_stop (ptid_t (inferior_ptid
.pid ()));
2787 mode
= async_exec
? ATTACH_POST_WAIT_RESUME
: ATTACH_POST_WAIT_STOP
;
2789 /* Some system don't generate traps when attaching to inferior.
2790 E.g. Mach 3 or GNU hurd. */
2791 if (!target_attach_no_wait ())
2793 struct attach_command_continuation_args
*a
;
2795 /* Careful here. See comments in inferior.h. Basically some
2796 OSes don't ignore SIGSTOPs on continue requests anymore. We
2797 need a way for handle_inferior_event to reset the stop_signal
2798 variable after an attach, and this is what
2799 STOP_QUIETLY_NO_SIGSTOP is for. */
2800 inferior
->control
.stop_soon
= STOP_QUIETLY_NO_SIGSTOP
;
2802 /* Wait for stop. */
2803 a
= XNEW (struct attach_command_continuation_args
);
2804 a
->args
= xstrdup (args
);
2805 a
->from_tty
= from_tty
;
2807 add_inferior_continuation (attach_command_continuation
, a
,
2808 attach_command_continuation_free_args
);
2810 /* Let infrun consider waiting for events out of this
2812 inferior
->process_target ()->threads_executing
= true;
2814 if (!target_is_async_p ())
2815 mark_infrun_async_event_handler ();
2819 attach_post_wait (args
, from_tty
, mode
);
2822 /* We had just found out that the target was already attached to an
2823 inferior. PTID points at a thread of this new inferior, that is
2824 the most likely to be stopped right now, but not necessarily so.
2825 The new inferior is assumed to be already added to the inferior
2826 list at this point. If LEAVE_RUNNING, then leave the threads of
2827 this inferior running, except those we've explicitly seen reported
2831 notice_new_inferior (thread_info
*thr
, int leave_running
, int from_tty
)
2833 enum attach_post_wait_mode mode
2834 = leave_running
? ATTACH_POST_WAIT_RESUME
: ATTACH_POST_WAIT_NOTHING
;
2836 gdb::optional
<scoped_restore_current_thread
> restore_thread
;
2838 if (inferior_ptid
!= null_ptid
)
2839 restore_thread
.emplace ();
2841 /* Avoid reading registers -- we haven't fetched the target
2843 switch_to_thread_no_regs (thr
);
2845 /* When we "notice" a new inferior we need to do all the things we
2846 would normally do if we had just attached to it. */
2850 struct attach_command_continuation_args
*a
;
2851 struct inferior
*inferior
= current_inferior ();
2853 /* We're going to install breakpoints, and poke at memory,
2854 ensure that the inferior is stopped for a moment while we do
2856 target_stop (inferior_ptid
);
2858 inferior
->control
.stop_soon
= STOP_QUIETLY_REMOTE
;
2860 /* Wait for stop before proceeding. */
2861 a
= XNEW (struct attach_command_continuation_args
);
2862 a
->args
= xstrdup ("");
2863 a
->from_tty
= from_tty
;
2865 add_inferior_continuation (attach_command_continuation
, a
,
2866 attach_command_continuation_free_args
);
2871 attach_post_wait ("" /* args */, from_tty
, mode
);
2876 * takes a program previously attached to and detaches it.
2877 * The program resumes execution and will no longer stop
2878 * on signals, etc. We better not have left any breakpoints
2879 * in the program or it'll die when it hits one. For this
2880 * to work, it may be necessary for the process to have been
2881 * previously attached. It *might* work if the program was
2882 * started via the normal ptrace (PTRACE_TRACEME).
2886 detach_command (const char *args
, int from_tty
)
2888 dont_repeat (); /* Not for the faint of heart. */
2890 if (inferior_ptid
== null_ptid
)
2891 error (_("The program is not being run."));
2893 query_if_trace_running (from_tty
);
2895 disconnect_tracing ();
2897 target_detach (current_inferior (), from_tty
);
2899 /* The current inferior process was just detached successfully. Get
2900 rid of breakpoints that no longer make sense. Note we don't do
2901 this within target_detach because that is also used when
2902 following child forks, and in that case we will want to transfer
2903 breakpoints to the child, not delete them. */
2904 breakpoint_init_inferior (inf_exited
);
2906 /* If the solist is global across inferiors, don't clear it when we
2907 detach from a single inferior. */
2908 if (!gdbarch_has_global_solist (target_gdbarch ()))
2909 no_shared_libraries (NULL
, from_tty
);
2911 if (deprecated_detach_hook
)
2912 deprecated_detach_hook ();
2915 /* Disconnect from the current target without resuming it (leaving it
2916 waiting for a debugger).
2918 We'd better not have left any breakpoints in the program or the
2919 next debugger will get confused. Currently only supported for some
2920 remote targets, since the normal attach mechanisms don't work on
2921 stopped processes on some native platforms (e.g. GNU/Linux). */
2924 disconnect_command (const char *args
, int from_tty
)
2926 dont_repeat (); /* Not for the faint of heart. */
2927 query_if_trace_running (from_tty
);
2928 disconnect_tracing ();
2929 target_disconnect (args
, from_tty
);
2930 no_shared_libraries (NULL
, from_tty
);
2931 init_thread_list ();
2932 if (deprecated_detach_hook
)
2933 deprecated_detach_hook ();
2936 /* Stop PTID in the current target, and tag the PTID threads as having
2937 been explicitly requested to stop. PTID can be a thread, a
2938 process, or minus_one_ptid, meaning all threads of all inferiors of
2939 the current target. */
2942 stop_current_target_threads_ns (ptid_t ptid
)
2946 /* Tag the thread as having been explicitly requested to stop, so
2947 other parts of gdb know not to resume this thread automatically,
2948 if it was stopped due to an internal event. Limit this to
2949 non-stop mode, as when debugging a multi-threaded application in
2950 all-stop mode, we will only get one stop event --- it's undefined
2951 which thread will report the event. */
2952 set_stop_requested (current_inferior ()->process_target (),
2956 /* See inferior.h. */
2959 interrupt_target_1 (bool all_threads
)
2965 scoped_restore_current_thread restore_thread
;
2967 for (inferior
*inf
: all_inferiors ())
2969 switch_to_inferior_no_thread (inf
);
2970 stop_current_target_threads_ns (minus_one_ptid
);
2974 stop_current_target_threads_ns (inferior_ptid
);
2977 target_interrupt ();
2981 Stop the execution of the target while running in async mode, in
2982 the background. In all-stop, stop the whole process. In non-stop
2983 mode, stop the current thread only by default, or stop all threads
2984 if the `-a' switch is used. */
2987 interrupt_command (const char *args
, int from_tty
)
2989 if (target_can_async_p ())
2991 int all_threads
= 0;
2993 dont_repeat (); /* Not for the faint of heart. */
2996 && startswith (args
, "-a"))
2999 if (!non_stop
&& all_threads
)
3000 error (_("-a is meaningless in all-stop mode."));
3002 interrupt_target_1 (all_threads
);
3006 /* See inferior.h. */
3009 default_print_float_info (struct gdbarch
*gdbarch
, struct ui_file
*file
,
3010 struct frame_info
*frame
, const char *args
)
3013 int printed_something
= 0;
3015 for (regnum
= 0; regnum
< gdbarch_num_cooked_regs (gdbarch
); regnum
++)
3017 if (gdbarch_register_reggroup_p (gdbarch
, regnum
, float_reggroup
))
3019 printed_something
= 1;
3020 gdbarch_print_registers_info (gdbarch
, file
, frame
, regnum
, 1);
3023 if (!printed_something
)
3024 fprintf_filtered (file
, "No floating-point info "
3025 "available for this processor.\n");
3029 info_float_command (const char *args
, int from_tty
)
3031 struct frame_info
*frame
;
3033 if (!target_has_registers
)
3034 error (_("The program has no registers now."));
3036 frame
= get_selected_frame (NULL
);
3037 gdbarch_print_float_info (get_frame_arch (frame
), gdb_stdout
, frame
, args
);
3041 unset_command (const char *args
, int from_tty
)
3043 printf_filtered (_("\"unset\" must be followed by the "
3044 "name of an unset subcommand.\n"));
3045 help_list (unsetlist
, "unset ", all_commands
, gdb_stdout
);
3048 /* Implement `info proc' family of commands. */
3051 info_proc_cmd_1 (const char *args
, enum info_proc_what what
, int from_tty
)
3053 struct gdbarch
*gdbarch
= get_current_arch ();
3055 if (!target_info_proc (args
, what
))
3057 if (gdbarch_info_proc_p (gdbarch
))
3058 gdbarch_info_proc (gdbarch
, args
, what
);
3060 error (_("Not supported on this target."));
3064 /* Implement `info proc' when given without any further parameters. */
3067 info_proc_cmd (const char *args
, int from_tty
)
3069 info_proc_cmd_1 (args
, IP_MINIMAL
, from_tty
);
3072 /* Implement `info proc mappings'. */
3075 info_proc_cmd_mappings (const char *args
, int from_tty
)
3077 info_proc_cmd_1 (args
, IP_MAPPINGS
, from_tty
);
3080 /* Implement `info proc stat'. */
3083 info_proc_cmd_stat (const char *args
, int from_tty
)
3085 info_proc_cmd_1 (args
, IP_STAT
, from_tty
);
3088 /* Implement `info proc status'. */
3091 info_proc_cmd_status (const char *args
, int from_tty
)
3093 info_proc_cmd_1 (args
, IP_STATUS
, from_tty
);
3096 /* Implement `info proc cwd'. */
3099 info_proc_cmd_cwd (const char *args
, int from_tty
)
3101 info_proc_cmd_1 (args
, IP_CWD
, from_tty
);
3104 /* Implement `info proc cmdline'. */
3107 info_proc_cmd_cmdline (const char *args
, int from_tty
)
3109 info_proc_cmd_1 (args
, IP_CMDLINE
, from_tty
);
3112 /* Implement `info proc exe'. */
3115 info_proc_cmd_exe (const char *args
, int from_tty
)
3117 info_proc_cmd_1 (args
, IP_EXE
, from_tty
);
3120 /* Implement `info proc files'. */
3123 info_proc_cmd_files (const char *args
, int from_tty
)
3125 info_proc_cmd_1 (args
, IP_FILES
, from_tty
);
3128 /* Implement `info proc all'. */
3131 info_proc_cmd_all (const char *args
, int from_tty
)
3133 info_proc_cmd_1 (args
, IP_ALL
, from_tty
);
3136 /* Implement `show print finish'. */
3139 show_print_finish (struct ui_file
*file
, int from_tty
,
3140 struct cmd_list_element
*c
,
3143 fprintf_filtered (file
, _("\
3144 Printing of return value after `finish' is %s.\n"),
3149 /* This help string is used for the run, start, and starti commands.
3150 It is defined as a macro to prevent duplication. */
3152 #define RUN_ARGS_HELP \
3153 "You may specify arguments to give it.\n\
3154 Args may include \"*\", or \"[...]\"; they are expanded using the\n\
3155 shell that will start the program (specified by the \"$SHELL\" environment\n\
3156 variable). Input and output redirection with \">\", \"<\", or \">>\"\n\
3157 are also allowed.\n\
3159 With no arguments, uses arguments last specified (with \"run\" or \n\
3160 \"set args\"). To cancel previous arguments and run with no arguments,\n\
3161 use \"set args\" without arguments.\n\
3163 To start the inferior without using a shell, use \"set startup-with-shell off\"."
3166 _initialize_infcmd (void)
3168 static struct cmd_list_element
*info_proc_cmdlist
;
3169 struct cmd_list_element
*c
= NULL
;
3170 const char *cmd_name
;
3172 /* Add the filename of the terminal connected to inferior I/O. */
3173 add_setshow_optional_filename_cmd ("inferior-tty", class_run
,
3174 &inferior_io_terminal_scratch
, _("\
3175 Set terminal for future runs of program being debugged."), _("\
3176 Show terminal for future runs of program being debugged."), _("\
3177 Usage: set inferior-tty [TTY]\n\n\
3178 If TTY is omitted, the default behavior of using the same terminal as GDB\n\
3180 set_inferior_tty_command
,
3181 show_inferior_tty_command
,
3182 &setlist
, &showlist
);
3183 cmd_name
= "inferior-tty";
3184 c
= lookup_cmd (&cmd_name
, setlist
, "", -1, 1);
3185 gdb_assert (c
!= NULL
);
3186 add_alias_cmd ("tty", c
, class_alias
, 0, &cmdlist
);
3189 add_setshow_string_noescape_cmd (cmd_name
, class_run
,
3190 &inferior_args_scratch
, _("\
3191 Set argument list to give program being debugged when it is started."), _("\
3192 Show argument list to give program being debugged when it is started."), _("\
3193 Follow this command with any number of args, to be passed to the program."),
3196 &setlist
, &showlist
);
3197 c
= lookup_cmd (&cmd_name
, setlist
, "", -1, 1);
3198 gdb_assert (c
!= NULL
);
3199 set_cmd_completer (c
, filename_completer
);
3202 add_setshow_string_noescape_cmd (cmd_name
, class_run
,
3203 &inferior_cwd_scratch
, _("\
3204 Set the current working directory to be used when the inferior is started.\n\
3205 Changing this setting does not have any effect on inferiors that are\n\
3208 Show the current working directory that is used when the inferior is started."),
3210 Use this command to change the current working directory that will be used\n\
3211 when the inferior is started. This setting does not affect GDB's current\n\
3212 working directory."),
3215 &setlist
, &showlist
);
3216 c
= lookup_cmd (&cmd_name
, setlist
, "", -1, 1);
3217 gdb_assert (c
!= NULL
);
3218 set_cmd_completer (c
, filename_completer
);
3220 c
= add_cmd ("environment", no_class
, environment_info
, _("\
3221 The environment to give the program, or one variable's value.\n\
3222 With an argument VAR, prints the value of environment variable VAR to\n\
3223 give the program being debugged. With no arguments, prints the entire\n\
3224 environment to be given to the program."), &showlist
);
3225 set_cmd_completer (c
, noop_completer
);
3227 add_prefix_cmd ("unset", no_class
, unset_command
,
3228 _("Complement to certain \"set\" commands."),
3229 &unsetlist
, "unset ", 0, &cmdlist
);
3231 c
= add_cmd ("environment", class_run
, unset_environment_command
, _("\
3232 Cancel environment variable VAR for the program.\n\
3233 This does not affect the program until the next \"run\" command."),
3235 set_cmd_completer (c
, noop_completer
);
3237 c
= add_cmd ("environment", class_run
, set_environment_command
, _("\
3238 Set environment variable value to give the program.\n\
3239 Arguments are VAR VALUE where VAR is variable name and VALUE is value.\n\
3240 VALUES of environment variables are uninterpreted strings.\n\
3241 This does not affect the program until the next \"run\" command."),
3243 set_cmd_completer (c
, noop_completer
);
3245 c
= add_com ("path", class_files
, path_command
, _("\
3246 Add directory DIR(s) to beginning of search path for object files.\n\
3247 $cwd in the path means the current working directory.\n\
3248 This path is equivalent to the $PATH shell variable. It is a list of\n\
3249 directories, separated by colons. These directories are searched to find\n\
3250 fully linked executable files and separately compiled object files as \
3252 set_cmd_completer (c
, filename_completer
);
3254 c
= add_cmd ("paths", no_class
, path_info
, _("\
3255 Current search path for finding object files.\n\
3256 $cwd in the path means the current working directory.\n\
3257 This path is equivalent to the $PATH shell variable. It is a list of\n\
3258 directories, separated by colons. These directories are searched to find\n\
3259 fully linked executable files and separately compiled object files as \
3262 set_cmd_completer (c
, noop_completer
);
3264 add_prefix_cmd ("kill", class_run
, kill_command
,
3265 _("Kill execution of program being debugged."),
3266 &killlist
, "kill ", 0, &cmdlist
);
3268 add_com ("attach", class_run
, attach_command
, _("\
3269 Attach to a process or file outside of GDB.\n\
3270 This command attaches to another target, of the same type as your last\n\
3271 \"target\" command (\"info files\" will show your target stack).\n\
3272 The command may take as argument a process id or a device file.\n\
3273 For a process id, you must have permission to send the process a signal,\n\
3274 and it must have the same effective uid as the debugger.\n\
3275 When using \"attach\" with a process id, the debugger finds the\n\
3276 program running in the process, looking first in the current working\n\
3277 directory, or (if not found there) using the source file search path\n\
3278 (see the \"directory\" command). You can also use the \"file\" command\n\
3279 to specify the program, and to load its symbol table."));
3281 add_prefix_cmd ("detach", class_run
, detach_command
, _("\
3282 Detach a process or file previously attached.\n\
3283 If a process, it is no longer traced, and it continues its execution. If\n\
3284 you were debugging a file, the file is closed and gdb no longer accesses it."),
3285 &detachlist
, "detach ", 0, &cmdlist
);
3287 add_com ("disconnect", class_run
, disconnect_command
, _("\
3288 Disconnect from a target.\n\
3289 The target will wait for another debugger to connect. Not available for\n\
3292 c
= add_com ("signal", class_run
, signal_command
, _("\
3293 Continue program with the specified signal.\n\
3294 Usage: signal SIGNAL\n\
3295 The SIGNAL argument is processed the same as the handle command.\n\
3297 An argument of \"0\" means continue the program without sending it a signal.\n\
3298 This is useful in cases where the program stopped because of a signal,\n\
3299 and you want to resume the program while discarding the signal.\n\
3301 In a multi-threaded program the signal is delivered to, or discarded from,\n\
3302 the current thread only."));
3303 set_cmd_completer (c
, signal_completer
);
3305 c
= add_com ("queue-signal", class_run
, queue_signal_command
, _("\
3306 Queue a signal to be delivered to the current thread when it is resumed.\n\
3307 Usage: queue-signal SIGNAL\n\
3308 The SIGNAL argument is processed the same as the handle command.\n\
3309 It is an error if the handling state of SIGNAL is \"nopass\".\n\
3311 An argument of \"0\" means remove any currently queued signal from\n\
3312 the current thread. This is useful in cases where the program stopped\n\
3313 because of a signal, and you want to resume it while discarding the signal.\n\
3315 In a multi-threaded program the signal is queued with, or discarded from,\n\
3316 the current thread only."));
3317 set_cmd_completer (c
, signal_completer
);
3319 add_com ("stepi", class_run
, stepi_command
, _("\
3320 Step one instruction exactly.\n\
3322 Argument N means step N times (or till program stops for another \
3324 add_com_alias ("si", "stepi", class_alias
, 0);
3326 add_com ("nexti", class_run
, nexti_command
, _("\
3327 Step one instruction, but proceed through subroutine calls.\n\
3329 Argument N means step N times (or till program stops for another \
3331 add_com_alias ("ni", "nexti", class_alias
, 0);
3333 add_com ("finish", class_run
, finish_command
, _("\
3334 Execute until selected stack frame returns.\n\
3336 Upon return, the value returned is printed and put in the value history."));
3337 add_com_alias ("fin", "finish", class_run
, 1);
3339 add_com ("next", class_run
, next_command
, _("\
3340 Step program, proceeding through subroutine calls.\n\
3342 Unlike \"step\", if the current source line calls a subroutine,\n\
3343 this command does not enter the subroutine, but instead steps over\n\
3344 the call, in effect treating it as a single source line."));
3345 add_com_alias ("n", "next", class_run
, 1);
3347 add_com ("step", class_run
, step_command
, _("\
3348 Step program until it reaches a different source line.\n\
3350 Argument N means step N times (or till program stops for another \
3352 add_com_alias ("s", "step", class_run
, 1);
3354 c
= add_com ("until", class_run
, until_command
, _("\
3355 Execute until past the current line or past a LOCATION.\n\
3356 Execute until the program reaches a source line greater than the current\n\
3357 or a specified location (same args as break command) within the current \
3359 set_cmd_completer (c
, location_completer
);
3360 add_com_alias ("u", "until", class_run
, 1);
3362 c
= add_com ("advance", class_run
, advance_command
, _("\
3363 Continue the program up to the given location (same form as args for break \
3365 Execution will also stop upon exit from the current stack frame."));
3366 set_cmd_completer (c
, location_completer
);
3368 c
= add_com ("jump", class_run
, jump_command
, _("\
3369 Continue program being debugged at specified line or address.\n\
3370 Usage: jump LOCATION\n\
3371 Give as argument either LINENUM or *ADDR, where ADDR is an expression\n\
3372 for an address to start at."));
3373 set_cmd_completer (c
, location_completer
);
3374 add_com_alias ("j", "jump", class_run
, 1);
3376 add_com ("continue", class_run
, continue_command
, _("\
3377 Continue program being debugged, after signal or breakpoint.\n\
3378 Usage: continue [N]\n\
3379 If proceeding from breakpoint, a number N may be used as an argument,\n\
3380 which means to set the ignore count of that breakpoint to N - 1 (so that\n\
3381 the breakpoint won't break until the Nth time it is reached).\n\
3383 If non-stop mode is enabled, continue only the current thread,\n\
3384 otherwise all the threads in the program are continued. To \n\
3385 continue all stopped threads in non-stop mode, use the -a option.\n\
3386 Specifying -a and an ignore count simultaneously is an error."));
3387 add_com_alias ("c", "cont", class_run
, 1);
3388 add_com_alias ("fg", "cont", class_run
, 1);
3390 c
= add_com ("run", class_run
, run_command
, _("\
3391 Start debugged program.\n"
3393 set_cmd_completer (c
, filename_completer
);
3394 add_com_alias ("r", "run", class_run
, 1);
3396 c
= add_com ("start", class_run
, start_command
, _("\
3397 Start the debugged program stopping at the beginning of the main procedure.\n"
3399 set_cmd_completer (c
, filename_completer
);
3401 c
= add_com ("starti", class_run
, starti_command
, _("\
3402 Start the debugged program stopping at the first instruction.\n"
3404 set_cmd_completer (c
, filename_completer
);
3406 add_com ("interrupt", class_run
, interrupt_command
,
3407 _("Interrupt the execution of the debugged program.\n\
3408 If non-stop mode is enabled, interrupt only the current thread,\n\
3409 otherwise all the threads in the program are stopped. To \n\
3410 interrupt all running threads in non-stop mode, use the -a option."));
3412 c
= add_info ("registers", info_registers_command
, _("\
3413 List of integer registers and their contents, for selected stack frame.\n\
3414 One or more register names as argument means describe the given registers.\n\
3415 One or more register group names as argument means describe the registers\n\
3416 in the named register groups."));
3417 add_info_alias ("r", "registers", 1);
3418 set_cmd_completer (c
, reg_or_group_completer
);
3420 c
= add_info ("all-registers", info_all_registers_command
, _("\
3421 List of all registers and their contents, for selected stack frame.\n\
3422 One or more register names as argument means describe the given registers.\n\
3423 One or more register group names as argument means describe the registers\n\
3424 in the named register groups."));
3425 set_cmd_completer (c
, reg_or_group_completer
);
3427 add_info ("program", info_program_command
,
3428 _("Execution status of the program."));
3430 add_info ("float", info_float_command
,
3431 _("Print the status of the floating point unit."));
3433 add_info ("vector", info_vector_command
,
3434 _("Print the status of the vector unit."));
3436 add_prefix_cmd ("proc", class_info
, info_proc_cmd
,
3438 Show additional information about a process.\n\
3439 Specify any process id, or use the program being debugged by default."),
3440 &info_proc_cmdlist
, "info proc ",
3441 1/*allow-unknown*/, &infolist
);
3443 add_cmd ("mappings", class_info
, info_proc_cmd_mappings
, _("\
3444 List memory regions mapped by the specified process."),
3445 &info_proc_cmdlist
);
3447 add_cmd ("stat", class_info
, info_proc_cmd_stat
, _("\
3448 List process info from /proc/PID/stat."),
3449 &info_proc_cmdlist
);
3451 add_cmd ("status", class_info
, info_proc_cmd_status
, _("\
3452 List process info from /proc/PID/status."),
3453 &info_proc_cmdlist
);
3455 add_cmd ("cwd", class_info
, info_proc_cmd_cwd
, _("\
3456 List current working directory of the specified process."),
3457 &info_proc_cmdlist
);
3459 add_cmd ("cmdline", class_info
, info_proc_cmd_cmdline
, _("\
3460 List command line arguments of the specified process."),
3461 &info_proc_cmdlist
);
3463 add_cmd ("exe", class_info
, info_proc_cmd_exe
, _("\
3464 List absolute filename for executable of the specified process."),
3465 &info_proc_cmdlist
);
3467 add_cmd ("files", class_info
, info_proc_cmd_files
, _("\
3468 List files opened by the specified process."),
3469 &info_proc_cmdlist
);
3471 add_cmd ("all", class_info
, info_proc_cmd_all
, _("\
3472 List all available info about the specified process."),
3473 &info_proc_cmdlist
);
3475 add_setshow_boolean_cmd ("finish", class_support
,
3476 &user_print_options
.finish_print
, _("\
3477 Set whether `finish' prints the return value."), _("\
3478 Show whether `finish' prints the return value."), NULL
,
3481 &setprintlist
, &showprintlist
);