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 ptid_t finish_ptid
= (non_stop
649 ? ptid_t (current_inferior ()->pid
)
651 scoped_finish_thread_state
finish_state (finish_ptid
);
653 /* Pass zero for FROM_TTY, because at this point the "run" command
654 has done its thing; now we are setting up the running program. */
655 post_create_inferior (current_top_target (), 0);
657 /* Queue a pending event so that the program stops immediately. */
658 if (run_how
== RUN_STOP_AT_FIRST_INSN
)
660 thread_info
*thr
= inferior_thread ();
661 thr
->suspend
.waitstatus_pending_p
= 1;
662 thr
->suspend
.waitstatus
.kind
= TARGET_WAITKIND_STOPPED
;
663 thr
->suspend
.waitstatus
.value
.sig
= GDB_SIGNAL_0
;
666 /* Start the target running. Do not use -1 continuation as it would skip
667 breakpoint right at the entry point. */
668 proceed (regcache_read_pc (get_current_regcache ()), GDB_SIGNAL_0
);
670 /* Since there was no error, there's no need to finish the thread
672 finish_state
.release ();
676 run_command (const char *args
, int from_tty
)
678 run_command_1 (args
, from_tty
, RUN_NORMAL
);
681 /* Start the execution of the program up until the beginning of the main
685 start_command (const char *args
, int from_tty
)
687 /* Some languages such as Ada need to search inside the program
688 minimal symbols for the location where to put the temporary
689 breakpoint before starting. */
690 if (!have_minimal_symbols ())
691 error (_("No symbol table loaded. Use the \"file\" command."));
693 /* Run the program until reaching the main procedure... */
694 run_command_1 (args
, from_tty
, RUN_STOP_AT_MAIN
);
697 /* Start the execution of the program stopping at the first
701 starti_command (const char *args
, int from_tty
)
703 run_command_1 (args
, from_tty
, RUN_STOP_AT_FIRST_INSN
);
707 proceed_thread_callback (struct thread_info
*thread
, void *arg
)
709 /* We go through all threads individually instead of compressing
710 into a single target `resume_all' request, because some threads
711 may be stopped in internal breakpoints/events, or stopped waiting
712 for its turn in the displaced stepping queue (that is, they are
713 running && !executing). The target side has no idea about why
714 the thread is stopped, so a `resume_all' command would resume too
715 much. If/when GDB gains a way to tell the target `hold this
716 thread stopped until I say otherwise', then we can optimize
718 if (thread
->state
!= THREAD_STOPPED
)
721 switch_to_thread (thread
);
722 clear_proceed_status (0);
723 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
728 ensure_valid_thread (void)
730 if (inferior_ptid
== null_ptid
731 || inferior_thread ()->state
== THREAD_EXITED
)
732 error (_("Cannot execute this command without a live selected thread."));
735 /* If the user is looking at trace frames, any resumption of execution
736 is likely to mix up recorded and live target data. So simply
737 disallow those commands. */
740 ensure_not_tfind_mode (void)
742 if (get_traceframe_number () >= 0)
743 error (_("Cannot execute this command while looking at trace frames."));
746 /* Throw an error indicating the current thread is running. */
749 error_is_running (void)
751 error (_("Cannot execute this command while "
752 "the selected thread is running."));
755 /* Calls error_is_running if the current thread is running. */
758 ensure_not_running (void)
760 if (inferior_thread ()->state
== THREAD_RUNNING
)
765 continue_1 (int all_threads
)
768 ensure_not_tfind_mode ();
770 if (non_stop
&& all_threads
)
772 /* Don't error out if the current thread is running, because
773 there may be other stopped threads. */
775 /* Backup current thread and selected frame and restore on scope
777 scoped_restore_current_thread restore_thread
;
779 iterate_over_threads (proceed_thread_callback
, NULL
);
781 if (current_ui
->prompt_state
== PROMPT_BLOCKED
)
783 /* If all threads in the target were already running,
784 proceed_thread_callback ends up never calling proceed,
785 and so nothing calls this to put the inferior's terminal
786 settings in effect and remove stdin from the event loop,
787 which we must when running a foreground command. E.g.:
791 <all threads are running now>
794 <no thread was resumed, but the inferior now owns the terminal>
796 target_terminal::inferior ();
801 ensure_valid_thread ();
802 ensure_not_running ();
803 clear_proceed_status (0);
804 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
808 /* continue [-a] [proceed-count] [&] */
811 continue_command (const char *args
, int from_tty
)
818 /* Find out whether we must run in the background. */
819 gdb::unique_xmalloc_ptr
<char> stripped
= strip_bg_char (args
, &async_exec
);
820 args
= stripped
.get ();
824 if (startswith (args
, "-a"))
827 args
+= sizeof ("-a") - 1;
833 if (!non_stop
&& all_threads
)
834 error (_("`-a' is meaningless in all-stop mode."));
836 if (args
!= NULL
&& all_threads
)
837 error (_("Can't resume all threads and specify "
838 "proceed count simultaneously."));
840 /* If we have an argument left, set proceed count of breakpoint we
847 struct thread_info
*tp
;
850 tp
= inferior_thread ();
855 get_last_target_status (&last_ptid
, nullptr);
856 tp
= find_thread_ptid (last_ptid
);
859 bs
= tp
->control
.stop_bpstat
;
861 while ((stat
= bpstat_num (&bs
, &num
)) != 0)
864 set_ignore_count (num
,
865 parse_and_eval_long (args
) - 1,
867 /* set_ignore_count prints a message ending with a period.
868 So print two spaces before "Continuing.". */
870 printf_filtered (" ");
874 if (!stopped
&& from_tty
)
877 ("Not stopped at any breakpoint; argument ignored.\n");
882 ensure_not_tfind_mode ();
884 if (!non_stop
|| !all_threads
)
886 ensure_valid_thread ();
887 ensure_not_running ();
890 prepare_execution_command (current_top_target (), async_exec
);
893 printf_filtered (_("Continuing.\n"));
895 continue_1 (all_threads
);
898 /* Record the starting point of a "step" or "next" command. */
901 set_step_frame (void)
903 frame_info
*frame
= get_current_frame ();
905 symtab_and_line sal
= find_frame_sal (frame
);
906 set_step_info (frame
, sal
);
908 CORE_ADDR pc
= get_frame_pc (frame
);
909 thread_info
*tp
= inferior_thread ();
910 tp
->control
.step_start_function
= find_pc_function (pc
);
913 /* Step until outside of current statement. */
916 step_command (const char *count_string
, int from_tty
)
918 step_1 (0, 0, count_string
);
921 /* Likewise, but skip over subroutine calls as if single instructions. */
924 next_command (const char *count_string
, int from_tty
)
926 step_1 (1, 0, count_string
);
929 /* Likewise, but step only one instruction. */
932 stepi_command (const char *count_string
, int from_tty
)
934 step_1 (0, 1, count_string
);
938 nexti_command (const char *count_string
, int from_tty
)
940 step_1 (1, 1, count_string
);
943 /* Data for the FSM that manages the step/next/stepi/nexti
946 struct step_command_fsm
: public thread_fsm
948 /* How many steps left in a "step N"-like command. */
951 /* If true, this is a next/nexti, otherwise a step/stepi. */
952 int skip_subroutines
;
954 /* If true, this is a stepi/nexti, otherwise a step/step. */
957 explicit step_command_fsm (struct interp
*cmd_interp
)
958 : thread_fsm (cmd_interp
)
962 void clean_up (struct thread_info
*thread
) override
;
963 bool should_stop (struct thread_info
*thread
) override
;
964 enum async_reply_reason
do_async_reply_reason () override
;
967 /* Prepare for a step/next/etc. command. Any target resource
968 allocated here is undone in the FSM's clean_up method. */
971 step_command_fsm_prepare (struct step_command_fsm
*sm
,
972 int skip_subroutines
, int single_inst
,
973 int count
, struct thread_info
*thread
)
975 sm
->skip_subroutines
= skip_subroutines
;
976 sm
->single_inst
= single_inst
;
979 /* Leave the si command alone. */
980 if (!sm
->single_inst
|| sm
->skip_subroutines
)
981 set_longjmp_breakpoint (thread
, get_frame_id (get_current_frame ()));
983 thread
->control
.stepping_command
= 1;
986 static int prepare_one_step (struct step_command_fsm
*sm
);
989 step_1 (int skip_subroutines
, int single_inst
, const char *count_string
)
993 struct thread_info
*thr
;
994 struct step_command_fsm
*step_sm
;
997 ensure_not_tfind_mode ();
998 ensure_valid_thread ();
999 ensure_not_running ();
1001 gdb::unique_xmalloc_ptr
<char> stripped
1002 = strip_bg_char (count_string
, &async_exec
);
1003 count_string
= stripped
.get ();
1005 prepare_execution_command (current_top_target (), async_exec
);
1007 count
= count_string
? parse_and_eval_long (count_string
) : 1;
1009 clear_proceed_status (1);
1011 /* Setup the execution command state machine to handle all the COUNT
1013 thr
= inferior_thread ();
1014 step_sm
= new step_command_fsm (command_interp ());
1015 thr
->thread_fsm
= step_sm
;
1017 step_command_fsm_prepare (step_sm
, skip_subroutines
,
1018 single_inst
, count
, thr
);
1020 /* Do only one step for now, before returning control to the event
1021 loop. Let the continuation figure out how many other steps we
1022 need to do, and handle them one at the time, through
1024 if (!prepare_one_step (step_sm
))
1025 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
1030 /* Stepped into an inline frame. Pretend that we've
1032 thr
->thread_fsm
->clean_up (thr
);
1033 proceeded
= normal_stop ();
1035 inferior_event_handler (INF_EXEC_COMPLETE
, NULL
);
1036 all_uis_check_sync_execution_done ();
1040 /* Implementation of the 'should_stop' FSM method for stepping
1041 commands. Called after we are done with one step operation, to
1042 check whether we need to step again, before we print the prompt and
1043 return control to the user. If count is > 1, returns false, as we
1044 will need to keep going. */
1047 step_command_fsm::should_stop (struct thread_info
*tp
)
1049 if (tp
->control
.stop_step
)
1051 /* There are more steps to make, and we did stop due to
1052 ending a stepping range. Do another step. */
1054 return prepare_one_step (this);
1062 /* Implementation of the 'clean_up' FSM method for stepping commands. */
1065 step_command_fsm::clean_up (struct thread_info
*thread
)
1067 if (!single_inst
|| skip_subroutines
)
1068 delete_longjmp_breakpoint (thread
->global_num
);
1071 /* Implementation of the 'async_reply_reason' FSM method for stepping
1074 enum async_reply_reason
1075 step_command_fsm::do_async_reply_reason ()
1077 return EXEC_ASYNC_END_STEPPING_RANGE
;
1080 /* Prepare for one step in "step N". The actual target resumption is
1081 done by the caller. Return true if we're done and should thus
1082 report a stop to the user. Returns false if the target needs to be
1086 prepare_one_step (struct step_command_fsm
*sm
)
1090 struct frame_info
*frame
= get_current_frame ();
1092 /* Don't assume THREAD is a valid thread id. It is set to -1 if
1093 the longjmp breakpoint was not required. Use the
1094 INFERIOR_PTID thread instead, which is the same thread when
1096 struct thread_info
*tp
= inferior_thread ();
1100 if (!sm
->single_inst
)
1104 /* Step at an inlined function behaves like "down". */
1105 if (!sm
->skip_subroutines
1106 && inline_skipped_frames (tp
))
1109 const char *fn
= NULL
;
1110 symtab_and_line sal
;
1113 /* Pretend that we've ran. */
1114 resume_ptid
= user_visible_resume_ptid (1);
1115 set_running (resume_ptid
, 1);
1117 step_into_inline_frame (tp
);
1119 frame
= get_current_frame ();
1120 sal
= find_frame_sal (frame
);
1121 sym
= get_frame_function (frame
);
1124 fn
= sym
->print_name ();
1127 || !function_name_is_marked_for_skip (fn
, sal
))
1130 return prepare_one_step (sm
);
1134 pc
= get_frame_pc (frame
);
1135 find_pc_line_pc_range (pc
,
1136 &tp
->control
.step_range_start
,
1137 &tp
->control
.step_range_end
);
1139 tp
->control
.may_range_step
= 1;
1141 /* If we have no line info, switch to stepi mode. */
1142 if (tp
->control
.step_range_end
== 0 && step_stop_if_no_debug
)
1144 tp
->control
.step_range_start
= tp
->control
.step_range_end
= 1;
1145 tp
->control
.may_range_step
= 0;
1147 else if (tp
->control
.step_range_end
== 0)
1151 if (find_pc_partial_function (pc
, &name
,
1152 &tp
->control
.step_range_start
,
1153 &tp
->control
.step_range_end
) == 0)
1154 error (_("Cannot find bounds of current function"));
1156 target_terminal::ours_for_output ();
1157 printf_filtered (_("Single stepping until exit from function %s,"
1158 "\nwhich has no line number information.\n"),
1164 /* Say we are stepping, but stop after one insn whatever it does. */
1165 tp
->control
.step_range_start
= tp
->control
.step_range_end
= 1;
1166 if (!sm
->skip_subroutines
)
1168 Don't step over function calls, not even to functions lacking
1170 tp
->control
.step_over_calls
= STEP_OVER_NONE
;
1173 if (sm
->skip_subroutines
)
1174 tp
->control
.step_over_calls
= STEP_OVER_ALL
;
1180 sm
->set_finished ();
1185 /* Continue program at specified address. */
1188 jump_command (const char *arg
, int from_tty
)
1190 struct gdbarch
*gdbarch
= get_current_arch ();
1197 ensure_not_tfind_mode ();
1198 ensure_valid_thread ();
1199 ensure_not_running ();
1201 /* Find out whether we must run in the background. */
1202 gdb::unique_xmalloc_ptr
<char> stripped
= strip_bg_char (arg
, &async_exec
);
1203 arg
= stripped
.get ();
1205 prepare_execution_command (current_top_target (), async_exec
);
1208 error_no_arg (_("starting address"));
1210 std::vector
<symtab_and_line
> sals
1211 = decode_line_with_last_displayed (arg
, DECODE_LINE_FUNFIRSTLINE
);
1212 if (sals
.size () != 1)
1213 error (_("Unreasonable jump request"));
1215 symtab_and_line
&sal
= sals
[0];
1217 if (sal
.symtab
== 0 && sal
.pc
== 0)
1218 error (_("No source file has been specified."));
1220 resolve_sal_pc (&sal
); /* May error out. */
1222 /* See if we are trying to jump to another function. */
1223 fn
= get_frame_function (get_current_frame ());
1224 sfn
= find_pc_function (sal
.pc
);
1225 if (fn
!= NULL
&& sfn
!= fn
)
1227 if (!query (_("Line %d is not in `%s'. Jump anyway? "), sal
.line
,
1230 error (_("Not confirmed."));
1237 struct obj_section
*section
;
1239 fixup_symbol_section (sfn
, 0);
1240 section
= SYMBOL_OBJ_SECTION (symbol_objfile (sfn
), sfn
);
1241 if (section_is_overlay (section
)
1242 && !section_is_mapped (section
))
1244 if (!query (_("WARNING!!! Destination is in "
1245 "unmapped overlay! Jump anyway? ")))
1247 error (_("Not confirmed."));
1257 printf_filtered (_("Continuing at "));
1258 fputs_filtered (paddress (gdbarch
, addr
), gdb_stdout
);
1259 printf_filtered (".\n");
1262 clear_proceed_status (0);
1263 proceed (addr
, GDB_SIGNAL_0
);
1266 /* Continue program giving it specified signal. */
1269 signal_command (const char *signum_exp
, int from_tty
)
1271 enum gdb_signal oursig
;
1274 dont_repeat (); /* Too dangerous. */
1276 ensure_not_tfind_mode ();
1277 ensure_valid_thread ();
1278 ensure_not_running ();
1280 /* Find out whether we must run in the background. */
1281 gdb::unique_xmalloc_ptr
<char> stripped
1282 = strip_bg_char (signum_exp
, &async_exec
);
1283 signum_exp
= stripped
.get ();
1285 prepare_execution_command (current_top_target (), async_exec
);
1288 error_no_arg (_("signal number"));
1290 /* It would be even slicker to make signal names be valid expressions,
1291 (the type could be "enum $signal" or some such), then the user could
1292 assign them to convenience variables. */
1293 oursig
= gdb_signal_from_name (signum_exp
);
1295 if (oursig
== GDB_SIGNAL_UNKNOWN
)
1297 /* No, try numeric. */
1298 int num
= parse_and_eval_long (signum_exp
);
1301 oursig
= GDB_SIGNAL_0
;
1303 oursig
= gdb_signal_from_command (num
);
1306 /* Look for threads other than the current that this command ends up
1307 resuming too (due to schedlock off), and warn if they'll get a
1308 signal delivered. "signal 0" is used to suppress a previous
1309 signal, but if the current thread is no longer the one that got
1310 the signal, then the user is potentially suppressing the signal
1311 of the wrong thread. */
1314 int must_confirm
= 0;
1316 /* This indicates what will be resumed. Either a single thread,
1317 a whole process, or all threads of all processes. */
1318 ptid_t resume_ptid
= user_visible_resume_ptid (0);
1320 for (thread_info
*tp
: all_non_exited_threads (resume_ptid
))
1322 if (tp
->ptid
== inferior_ptid
)
1325 if (tp
->suspend
.stop_signal
!= GDB_SIGNAL_0
1326 && signal_pass_state (tp
->suspend
.stop_signal
))
1329 printf_unfiltered (_("Note:\n"));
1330 printf_unfiltered (_(" Thread %s previously stopped with signal %s, %s.\n"),
1331 print_thread_id (tp
),
1332 gdb_signal_to_name (tp
->suspend
.stop_signal
),
1333 gdb_signal_to_string (tp
->suspend
.stop_signal
));
1339 && !query (_("Continuing thread %s (the current thread) with specified signal will\n"
1340 "still deliver the signals noted above to their respective threads.\n"
1341 "Continue anyway? "),
1342 print_thread_id (inferior_thread ())))
1343 error (_("Not confirmed."));
1348 if (oursig
== GDB_SIGNAL_0
)
1349 printf_filtered (_("Continuing with no signal.\n"));
1351 printf_filtered (_("Continuing with signal %s.\n"),
1352 gdb_signal_to_name (oursig
));
1355 clear_proceed_status (0);
1356 proceed ((CORE_ADDR
) -1, oursig
);
1359 /* Queue a signal to be delivered to the current thread. */
1362 queue_signal_command (const char *signum_exp
, int from_tty
)
1364 enum gdb_signal oursig
;
1365 struct thread_info
*tp
;
1368 ensure_not_tfind_mode ();
1369 ensure_valid_thread ();
1370 ensure_not_running ();
1372 if (signum_exp
== NULL
)
1373 error_no_arg (_("signal number"));
1375 /* It would be even slicker to make signal names be valid expressions,
1376 (the type could be "enum $signal" or some such), then the user could
1377 assign them to convenience variables. */
1378 oursig
= gdb_signal_from_name (signum_exp
);
1380 if (oursig
== GDB_SIGNAL_UNKNOWN
)
1382 /* No, try numeric. */
1383 int num
= parse_and_eval_long (signum_exp
);
1386 oursig
= GDB_SIGNAL_0
;
1388 oursig
= gdb_signal_from_command (num
);
1391 if (oursig
!= GDB_SIGNAL_0
1392 && !signal_pass_state (oursig
))
1393 error (_("Signal handling set to not pass this signal to the program."));
1395 tp
= inferior_thread ();
1396 tp
->suspend
.stop_signal
= oursig
;
1399 /* Data for the FSM that manages the until (with no argument)
1402 struct until_next_fsm
: public thread_fsm
1404 /* The thread that as current when the command was executed. */
1407 until_next_fsm (struct interp
*cmd_interp
, int thread
)
1408 : thread_fsm (cmd_interp
),
1413 bool should_stop (struct thread_info
*thread
) override
;
1414 void clean_up (struct thread_info
*thread
) override
;
1415 enum async_reply_reason
do_async_reply_reason () override
;
1418 /* Implementation of the 'should_stop' FSM method for the until (with
1422 until_next_fsm::should_stop (struct thread_info
*tp
)
1424 if (tp
->control
.stop_step
)
1430 /* Implementation of the 'clean_up' FSM method for the until (with no
1434 until_next_fsm::clean_up (struct thread_info
*thread
)
1436 delete_longjmp_breakpoint (thread
->global_num
);
1439 /* Implementation of the 'async_reply_reason' FSM method for the until
1440 (with no arg) command. */
1442 enum async_reply_reason
1443 until_next_fsm::do_async_reply_reason ()
1445 return EXEC_ASYNC_END_STEPPING_RANGE
;
1448 /* Proceed until we reach a different source line with pc greater than
1449 our current one or exit the function. We skip calls in both cases.
1451 Note that eventually this command should probably be changed so
1452 that only source lines are printed out when we hit the breakpoint
1453 we set. This may involve changes to wait_for_inferior and the
1454 proceed status code. */
1457 until_next_command (int from_tty
)
1459 struct frame_info
*frame
;
1461 struct symbol
*func
;
1462 struct symtab_and_line sal
;
1463 struct thread_info
*tp
= inferior_thread ();
1464 int thread
= tp
->global_num
;
1465 struct until_next_fsm
*sm
;
1467 clear_proceed_status (0);
1470 frame
= get_current_frame ();
1472 /* Step until either exited from this function or greater
1473 than the current line (if in symbolic section) or pc (if
1476 pc
= get_frame_pc (frame
);
1477 func
= find_pc_function (pc
);
1481 struct bound_minimal_symbol msymbol
= lookup_minimal_symbol_by_pc (pc
);
1483 if (msymbol
.minsym
== NULL
)
1484 error (_("Execution is not within a known function."));
1486 tp
->control
.step_range_start
= BMSYMBOL_VALUE_ADDRESS (msymbol
);
1487 /* The upper-bound of step_range is exclusive. In order to make PC
1488 within the range, set the step_range_end with PC + 1. */
1489 tp
->control
.step_range_end
= pc
+ 1;
1493 sal
= find_pc_line (pc
, 0);
1495 tp
->control
.step_range_start
= BLOCK_ENTRY_PC (SYMBOL_BLOCK_VALUE (func
));
1496 tp
->control
.step_range_end
= sal
.end
;
1498 tp
->control
.may_range_step
= 1;
1500 tp
->control
.step_over_calls
= STEP_OVER_ALL
;
1502 set_longjmp_breakpoint (tp
, get_frame_id (frame
));
1503 delete_longjmp_breakpoint_cleanup
lj_deleter (thread
);
1505 sm
= new until_next_fsm (command_interp (), tp
->global_num
);
1506 tp
->thread_fsm
= sm
;
1507 lj_deleter
.release ();
1509 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
1513 until_command (const char *arg
, int from_tty
)
1518 ensure_not_tfind_mode ();
1519 ensure_valid_thread ();
1520 ensure_not_running ();
1522 /* Find out whether we must run in the background. */
1523 gdb::unique_xmalloc_ptr
<char> stripped
= strip_bg_char (arg
, &async_exec
);
1524 arg
= stripped
.get ();
1526 prepare_execution_command (current_top_target (), async_exec
);
1529 until_break_command (arg
, from_tty
, 0);
1531 until_next_command (from_tty
);
1535 advance_command (const char *arg
, int from_tty
)
1540 ensure_not_tfind_mode ();
1541 ensure_valid_thread ();
1542 ensure_not_running ();
1545 error_no_arg (_("a location"));
1547 /* Find out whether we must run in the background. */
1548 gdb::unique_xmalloc_ptr
<char> stripped
= strip_bg_char (arg
, &async_exec
);
1549 arg
= stripped
.get ();
1551 prepare_execution_command (current_top_target (), async_exec
);
1553 until_break_command (arg
, from_tty
, 1);
1556 /* Return the value of the result of a function at the end of a 'finish'
1557 command/BP. DTOR_DATA (if not NULL) can represent inferior registers
1558 right after an inferior call has finished. */
1561 get_return_value (struct value
*function
, struct type
*value_type
)
1563 regcache
*stop_regs
= get_current_regcache ();
1564 struct gdbarch
*gdbarch
= stop_regs
->arch ();
1565 struct value
*value
;
1567 value_type
= check_typedef (value_type
);
1568 gdb_assert (TYPE_CODE (value_type
) != TYPE_CODE_VOID
);
1570 /* FIXME: 2003-09-27: When returning from a nested inferior function
1571 call, it's possible (with no help from the architecture vector)
1572 to locate and return/print a "struct return" value. This is just
1573 a more complicated case of what is already being done in the
1574 inferior function call code. In fact, when inferior function
1575 calls are made async, this will likely be made the norm. */
1577 switch (gdbarch_return_value (gdbarch
, function
, value_type
,
1580 case RETURN_VALUE_REGISTER_CONVENTION
:
1581 case RETURN_VALUE_ABI_RETURNS_ADDRESS
:
1582 case RETURN_VALUE_ABI_PRESERVES_ADDRESS
:
1583 value
= allocate_value (value_type
);
1584 gdbarch_return_value (gdbarch
, function
, value_type
, stop_regs
,
1585 value_contents_raw (value
), NULL
);
1587 case RETURN_VALUE_STRUCT_CONVENTION
:
1591 internal_error (__FILE__
, __LINE__
, _("bad switch"));
1597 /* The captured function return value/type and its position in the
1600 struct return_value_info
1602 /* The captured return value. May be NULL if we weren't able to
1603 retrieve it. See get_return_value. */
1604 struct value
*value
;
1606 /* The return type. In some cases, we'll not be able extract the
1607 return value, but we always know the type. */
1610 /* If we captured a value, this is the value history index. */
1611 int value_history_index
;
1614 /* Helper for print_return_value. */
1617 print_return_value_1 (struct ui_out
*uiout
, struct return_value_info
*rv
)
1619 if (rv
->value
!= NULL
)
1621 struct value_print_options opts
;
1624 uiout
->text ("Value returned is ");
1625 uiout
->field_fmt ("gdb-result-var", "$%d",
1626 rv
->value_history_index
);
1627 uiout
->text (" = ");
1628 get_user_print_options (&opts
);
1630 if (opts
.finish_print
)
1633 value_print (rv
->value
, &stb
, &opts
);
1634 uiout
->field_stream ("return-value", stb
);
1637 uiout
->field_string ("return-value", _("<not displayed>"),
1638 metadata_style
.style ());
1643 std::string type_name
= type_to_string (rv
->type
);
1644 uiout
->text ("Value returned has type: ");
1645 uiout
->field_string ("return-type", type_name
.c_str ());
1647 uiout
->text (" Cannot determine contents\n");
1651 /* Print the result of a function at the end of a 'finish' command.
1652 RV points at an object representing the captured return value/type
1653 and its position in the value history. */
1656 print_return_value (struct ui_out
*uiout
, struct return_value_info
*rv
)
1658 if (rv
->type
== NULL
1659 || TYPE_CODE (check_typedef (rv
->type
)) == TYPE_CODE_VOID
)
1664 /* print_return_value_1 can throw an exception in some
1665 circumstances. We need to catch this so that we still
1666 delete the breakpoint. */
1667 print_return_value_1 (uiout
, rv
);
1669 catch (const gdb_exception
&ex
)
1671 exception_print (gdb_stdout
, ex
);
1675 /* Data for the FSM that manages the finish command. */
1677 struct finish_command_fsm
: public thread_fsm
1679 /* The momentary breakpoint set at the function's return address in
1681 breakpoint_up breakpoint
;
1683 /* The function that we're stepping out of. */
1684 struct symbol
*function
= nullptr;
1686 /* If the FSM finishes successfully, this stores the function's
1688 struct return_value_info return_value_info
{};
1690 explicit finish_command_fsm (struct interp
*cmd_interp
)
1691 : thread_fsm (cmd_interp
)
1695 bool should_stop (struct thread_info
*thread
) override
;
1696 void clean_up (struct thread_info
*thread
) override
;
1697 struct return_value_info
*return_value () override
;
1698 enum async_reply_reason
do_async_reply_reason () override
;
1701 /* Implementation of the 'should_stop' FSM method for the finish
1702 commands. Detects whether the thread stepped out of the function
1703 successfully, and if so, captures the function's return value and
1704 marks the FSM finished. */
1707 finish_command_fsm::should_stop (struct thread_info
*tp
)
1709 struct return_value_info
*rv
= &return_value_info
;
1711 if (function
!= NULL
1712 && bpstat_find_breakpoint (tp
->control
.stop_bpstat
,
1713 breakpoint
.get ()) != NULL
)
1718 rv
->type
= TYPE_TARGET_TYPE (SYMBOL_TYPE (function
));
1719 if (rv
->type
== NULL
)
1720 internal_error (__FILE__
, __LINE__
,
1721 _("finish_command: function has no target type"));
1723 if (TYPE_CODE (check_typedef (rv
->type
)) != TYPE_CODE_VOID
)
1727 func
= read_var_value (function
, NULL
, get_current_frame ());
1728 rv
->value
= get_return_value (func
, rv
->type
);
1729 if (rv
->value
!= NULL
)
1730 rv
->value_history_index
= record_latest_value (rv
->value
);
1733 else if (tp
->control
.stop_step
)
1735 /* Finishing from an inline frame, or reverse finishing. In
1736 either case, there's no way to retrieve the return value. */
1743 /* Implementation of the 'clean_up' FSM method for the finish
1747 finish_command_fsm::clean_up (struct thread_info
*thread
)
1749 breakpoint
.reset ();
1750 delete_longjmp_breakpoint (thread
->global_num
);
1753 /* Implementation of the 'return_value' FSM method for the finish
1756 struct return_value_info
*
1757 finish_command_fsm::return_value ()
1759 return &return_value_info
;
1762 /* Implementation of the 'async_reply_reason' FSM method for the
1765 enum async_reply_reason
1766 finish_command_fsm::do_async_reply_reason ()
1768 if (execution_direction
== EXEC_REVERSE
)
1769 return EXEC_ASYNC_END_STEPPING_RANGE
;
1771 return EXEC_ASYNC_FUNCTION_FINISHED
;
1774 /* finish_backward -- helper function for finish_command. */
1777 finish_backward (struct finish_command_fsm
*sm
)
1779 struct symtab_and_line sal
;
1780 struct thread_info
*tp
= inferior_thread ();
1782 CORE_ADDR func_addr
;
1784 pc
= get_frame_pc (get_current_frame ());
1786 if (find_pc_partial_function (pc
, NULL
, &func_addr
, NULL
) == 0)
1787 error (_("Cannot find bounds of current function"));
1789 sal
= find_pc_line (func_addr
, 0);
1791 tp
->control
.proceed_to_finish
= 1;
1792 /* Special case: if we're sitting at the function entry point,
1793 then all we need to do is take a reverse singlestep. We
1794 don't need to set a breakpoint, and indeed it would do us
1797 Note that this can only happen at frame #0, since there's
1798 no way that a function up the stack can have a return address
1799 that's equal to its entry point. */
1803 struct frame_info
*frame
= get_selected_frame (NULL
);
1804 struct gdbarch
*gdbarch
= get_frame_arch (frame
);
1806 /* Set a step-resume at the function's entry point. Once that's
1807 hit, we'll do one more step backwards. */
1808 symtab_and_line sr_sal
;
1810 sr_sal
.pspace
= get_frame_program_space (frame
);
1811 insert_step_resume_breakpoint_at_sal (gdbarch
,
1812 sr_sal
, null_frame_id
);
1814 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
1818 /* We're almost there -- we just need to back up by one more
1820 tp
->control
.step_range_start
= tp
->control
.step_range_end
= 1;
1821 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
1825 /* finish_forward -- helper function for finish_command. FRAME is the
1826 frame that called the function we're about to step out of. */
1829 finish_forward (struct finish_command_fsm
*sm
, struct frame_info
*frame
)
1831 struct frame_id frame_id
= get_frame_id (frame
);
1832 struct gdbarch
*gdbarch
= get_frame_arch (frame
);
1833 struct symtab_and_line sal
;
1834 struct thread_info
*tp
= inferior_thread ();
1836 sal
= find_pc_line (get_frame_pc (frame
), 0);
1837 sal
.pc
= get_frame_pc (frame
);
1839 sm
->breakpoint
= set_momentary_breakpoint (gdbarch
, sal
,
1840 get_stack_frame_id (frame
),
1843 /* set_momentary_breakpoint invalidates FRAME. */
1846 set_longjmp_breakpoint (tp
, frame_id
);
1848 /* We want to print return value, please... */
1849 tp
->control
.proceed_to_finish
= 1;
1851 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
1854 /* Skip frames for "finish". */
1856 static struct frame_info
*
1857 skip_finish_frames (struct frame_info
*frame
)
1859 struct frame_info
*start
;
1865 frame
= skip_tailcall_frames (frame
);
1869 frame
= skip_unwritable_frames (frame
);
1873 while (start
!= frame
);
1878 /* "finish": Set a temporary breakpoint at the place the selected
1879 frame will return to, then continue. */
1882 finish_command (const char *arg
, int from_tty
)
1884 struct frame_info
*frame
;
1886 struct finish_command_fsm
*sm
;
1887 struct thread_info
*tp
;
1890 ensure_not_tfind_mode ();
1891 ensure_valid_thread ();
1892 ensure_not_running ();
1894 /* Find out whether we must run in the background. */
1895 gdb::unique_xmalloc_ptr
<char> stripped
= strip_bg_char (arg
, &async_exec
);
1896 arg
= stripped
.get ();
1898 prepare_execution_command (current_top_target (), async_exec
);
1901 error (_("The \"finish\" command does not take any arguments."));
1903 frame
= get_prev_frame (get_selected_frame (_("No selected frame.")));
1905 error (_("\"finish\" not meaningful in the outermost frame."));
1907 clear_proceed_status (0);
1909 tp
= inferior_thread ();
1911 sm
= new finish_command_fsm (command_interp ());
1913 tp
->thread_fsm
= sm
;
1915 /* Finishing from an inline frame is completely different. We don't
1916 try to show the "return value" - no way to locate it. */
1917 if (get_frame_type (get_selected_frame (_("No selected frame.")))
1920 /* Claim we are stepping in the calling frame. An empty step
1921 range means that we will stop once we aren't in a function
1922 called by that frame. We don't use the magic "1" value for
1923 step_range_end, because then infrun will think this is nexti,
1924 and not step over the rest of this inlined function call. */
1925 set_step_info (frame
, {});
1926 tp
->control
.step_range_start
= get_frame_pc (frame
);
1927 tp
->control
.step_range_end
= tp
->control
.step_range_start
;
1928 tp
->control
.step_over_calls
= STEP_OVER_ALL
;
1930 /* Print info on the selected frame, including level number but not
1934 printf_filtered (_("Run till exit from "));
1935 print_stack_frame (get_selected_frame (NULL
), 1, LOCATION
, 0);
1938 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
1942 /* Find the function we will return from. */
1944 sm
->function
= find_pc_function (get_frame_pc (get_selected_frame (NULL
)));
1946 /* Print info on the selected frame, including level number but not
1950 if (execution_direction
== EXEC_REVERSE
)
1951 printf_filtered (_("Run back to call of "));
1954 if (sm
->function
!= NULL
&& TYPE_NO_RETURN (sm
->function
->type
)
1955 && !query (_("warning: Function %s does not return normally.\n"
1956 "Try to finish anyway? "),
1957 sm
->function
->print_name ()))
1958 error (_("Not confirmed."));
1959 printf_filtered (_("Run till exit from "));
1962 print_stack_frame (get_selected_frame (NULL
), 1, LOCATION
, 0);
1965 if (execution_direction
== EXEC_REVERSE
)
1966 finish_backward (sm
);
1969 frame
= skip_finish_frames (frame
);
1972 error (_("Cannot find the caller frame."));
1974 finish_forward (sm
, frame
);
1980 info_program_command (const char *args
, int from_tty
)
1986 if (!target_has_execution
)
1988 printf_filtered (_("The program being debugged is not being run.\n"));
1993 ptid
= inferior_ptid
;
1995 get_last_target_status (&ptid
, nullptr);
1997 if (ptid
== null_ptid
|| ptid
== minus_one_ptid
)
1998 error (_("No selected thread."));
2000 thread_info
*tp
= find_thread_ptid (ptid
);
2002 if (tp
->state
== THREAD_EXITED
)
2003 error (_("Invalid selected thread."));
2004 else if (tp
->state
== THREAD_RUNNING
)
2005 error (_("Selected thread is running."));
2007 bs
= tp
->control
.stop_bpstat
;
2008 stat
= bpstat_num (&bs
, &num
);
2010 target_files_info ();
2011 printf_filtered (_("Program stopped at %s.\n"),
2012 paddress (target_gdbarch (), tp
->suspend
.stop_pc
));
2013 if (tp
->control
.stop_step
)
2014 printf_filtered (_("It stopped after being stepped.\n"));
2017 /* There may be several breakpoints in the same place, so this
2018 isn't as strange as it seems. */
2023 printf_filtered (_("It stopped at a breakpoint "
2024 "that has since been deleted.\n"));
2027 printf_filtered (_("It stopped at breakpoint %d.\n"), num
);
2028 stat
= bpstat_num (&bs
, &num
);
2031 else if (tp
->suspend
.stop_signal
!= GDB_SIGNAL_0
)
2033 printf_filtered (_("It stopped with signal %s, %s.\n"),
2034 gdb_signal_to_name (tp
->suspend
.stop_signal
),
2035 gdb_signal_to_string (tp
->suspend
.stop_signal
));
2040 printf_filtered (_("Type \"info stack\" or \"info "
2041 "registers\" for more information.\n"));
2046 environment_info (const char *var
, int from_tty
)
2050 const char *val
= current_inferior ()->environment
.get (var
);
2054 puts_filtered (var
);
2055 puts_filtered (" = ");
2056 puts_filtered (val
);
2057 puts_filtered ("\n");
2061 puts_filtered ("Environment variable \"");
2062 puts_filtered (var
);
2063 puts_filtered ("\" not defined.\n");
2068 char **envp
= current_inferior ()->environment
.envp ();
2070 for (int idx
= 0; envp
[idx
] != NULL
; ++idx
)
2072 puts_filtered (envp
[idx
]);
2073 puts_filtered ("\n");
2079 set_environment_command (const char *arg
, int from_tty
)
2081 const char *p
, *val
;
2085 error_no_arg (_("environment variable and value"));
2087 /* Find separation between variable name and value. */
2088 p
= (char *) strchr (arg
, '=');
2089 val
= (char *) strchr (arg
, ' ');
2091 if (p
!= 0 && val
!= 0)
2093 /* We have both a space and an equals. If the space is before the
2094 equals, walk forward over the spaces til we see a nonspace
2095 (possibly the equals). */
2100 /* Now if the = is after the char following the spaces,
2101 take the char following the spaces. */
2105 else if (val
!= 0 && p
== 0)
2109 error_no_arg (_("environment variable to set"));
2111 if (p
== 0 || p
[1] == 0)
2115 p
= arg
+ strlen (arg
); /* So that savestring below will work. */
2119 /* Not setting variable value to null. */
2121 while (*val
== ' ' || *val
== '\t')
2125 while (p
!= arg
&& (p
[-1] == ' ' || p
[-1] == '\t'))
2128 std::string
var (arg
, p
- arg
);
2131 printf_filtered (_("Setting environment variable "
2132 "\"%s\" to null value.\n"),
2134 current_inferior ()->environment
.set (var
.c_str (), "");
2137 current_inferior ()->environment
.set (var
.c_str (), val
);
2141 unset_environment_command (const char *var
, int from_tty
)
2145 /* If there is no argument, delete all environment variables.
2146 Ask for confirmation if reading from the terminal. */
2147 if (!from_tty
|| query (_("Delete all environment variables? ")))
2148 current_inferior ()->environment
.clear ();
2151 current_inferior ()->environment
.unset (var
);
2154 /* Handle the execution path (PATH variable). */
2156 static const char path_var_name
[] = "PATH";
2159 path_info (const char *args
, int from_tty
)
2161 puts_filtered ("Executable and object file path: ");
2162 puts_filtered (current_inferior ()->environment
.get (path_var_name
));
2163 puts_filtered ("\n");
2166 /* Add zero or more directories to the front of the execution path. */
2169 path_command (const char *dirname
, int from_tty
)
2175 env
= current_inferior ()->environment
.get (path_var_name
);
2176 /* Can be null if path is not set. */
2179 exec_path
= xstrdup (env
);
2180 mod_path (dirname
, &exec_path
);
2181 current_inferior ()->environment
.set (path_var_name
, exec_path
);
2184 path_info (NULL
, from_tty
);
2189 pad_to_column (string_file
&stream
, int col
)
2191 /* At least one space must be printed to separate columns. */
2193 const int size
= stream
.size ();
2195 stream
.puts (n_spaces (col
- size
));
2198 /* Print out the register NAME with value VAL, to FILE, in the default
2202 default_print_one_register_info (struct ui_file
*file
,
2206 struct type
*regtype
= value_type (val
);
2207 int print_raw_format
;
2208 string_file format_stream
;
2211 value_column_1
= 15,
2212 /* Give enough room for "0x", 16 hex digits and two spaces in
2213 preceding column. */
2214 value_column_2
= value_column_1
+ 2 + 16 + 2,
2217 format_stream
.puts (name
);
2218 pad_to_column (format_stream
, value_column_1
);
2220 print_raw_format
= (value_entirely_available (val
)
2221 && !value_optimized_out (val
));
2223 /* If virtual format is floating, print it that way, and in raw
2225 if (TYPE_CODE (regtype
) == TYPE_CODE_FLT
2226 || TYPE_CODE (regtype
) == TYPE_CODE_DECFLOAT
)
2228 struct value_print_options opts
;
2229 const gdb_byte
*valaddr
= value_contents_for_printing (val
);
2230 enum bfd_endian byte_order
= type_byte_order (regtype
);
2232 get_user_print_options (&opts
);
2236 value_embedded_offset (val
), 0,
2237 &format_stream
, 0, val
, &opts
, current_language
);
2239 if (print_raw_format
)
2241 pad_to_column (format_stream
, value_column_2
);
2242 format_stream
.puts ("(raw ");
2243 print_hex_chars (&format_stream
, valaddr
, TYPE_LENGTH (regtype
),
2245 format_stream
.putc (')');
2250 struct value_print_options opts
;
2252 /* Print the register in hex. */
2253 get_formatted_print_options (&opts
, 'x');
2256 value_embedded_offset (val
), 0,
2257 &format_stream
, 0, val
, &opts
, current_language
);
2258 /* If not a vector register, print it also according to its
2260 if (print_raw_format
&& TYPE_VECTOR (regtype
) == 0)
2262 pad_to_column (format_stream
, value_column_2
);
2263 get_user_print_options (&opts
);
2266 value_embedded_offset (val
), 0,
2267 &format_stream
, 0, val
, &opts
, current_language
);
2271 fputs_filtered (format_stream
.c_str (), file
);
2272 fprintf_filtered (file
, "\n");
2275 /* Print out the machine register regnum. If regnum is -1, print all
2276 registers (print_all == 1) or all non-float and non-vector
2277 registers (print_all == 0).
2279 For most machines, having all_registers_info() print the
2280 register(s) one per line is good enough. If a different format is
2281 required, (eg, for MIPS or Pyramid 90x, which both have lots of
2282 regs), or there is an existing convention for showing all the
2283 registers, define the architecture method PRINT_REGISTERS_INFO to
2284 provide that format. */
2287 default_print_registers_info (struct gdbarch
*gdbarch
,
2288 struct ui_file
*file
,
2289 struct frame_info
*frame
,
2290 int regnum
, int print_all
)
2293 const int numregs
= gdbarch_num_cooked_regs (gdbarch
);
2295 for (i
= 0; i
< numregs
; i
++)
2297 /* Decide between printing all regs, non-float / vector regs, or
2303 if (!gdbarch_register_reggroup_p (gdbarch
, i
, all_reggroup
))
2308 if (!gdbarch_register_reggroup_p (gdbarch
, i
, general_reggroup
))
2318 /* If the register name is empty, it is undefined for this
2319 processor, so don't display anything. */
2320 if (gdbarch_register_name (gdbarch
, i
) == NULL
2321 || *(gdbarch_register_name (gdbarch
, i
)) == '\0')
2324 default_print_one_register_info (file
,
2325 gdbarch_register_name (gdbarch
, i
),
2326 value_of_register (i
, frame
));
2331 registers_info (const char *addr_exp
, int fpregs
)
2333 struct frame_info
*frame
;
2334 struct gdbarch
*gdbarch
;
2336 if (!target_has_registers
)
2337 error (_("The program has no registers now."));
2338 frame
= get_selected_frame (NULL
);
2339 gdbarch
= get_frame_arch (frame
);
2343 gdbarch_print_registers_info (gdbarch
, gdb_stdout
,
2348 while (*addr_exp
!= '\0')
2353 /* Skip leading white space. */
2354 addr_exp
= skip_spaces (addr_exp
);
2356 /* Discard any leading ``$''. Check that there is something
2357 resembling a register following it. */
2358 if (addr_exp
[0] == '$')
2360 if (isspace ((*addr_exp
)) || (*addr_exp
) == '\0')
2361 error (_("Missing register name"));
2363 /* Find the start/end of this register name/num/group. */
2365 while ((*addr_exp
) != '\0' && !isspace ((*addr_exp
)))
2369 /* Figure out what we've found and display it. */
2371 /* A register name? */
2373 int regnum
= user_reg_map_name_to_regnum (gdbarch
, start
, end
- start
);
2377 /* User registers lie completely outside of the range of
2378 normal registers. Catch them early so that the target
2380 if (regnum
>= gdbarch_num_cooked_regs (gdbarch
))
2382 struct value
*regval
= value_of_user_reg (regnum
, frame
);
2383 const char *regname
= user_reg_map_regnum_to_name (gdbarch
,
2386 /* Print in the same fashion
2387 gdbarch_print_registers_info's default
2388 implementation prints. */
2389 default_print_one_register_info (gdb_stdout
,
2394 gdbarch_print_registers_info (gdbarch
, gdb_stdout
,
2395 frame
, regnum
, fpregs
);
2400 /* A register group? */
2402 struct reggroup
*group
;
2404 for (group
= reggroup_next (gdbarch
, NULL
);
2406 group
= reggroup_next (gdbarch
, group
))
2408 /* Don't bother with a length check. Should the user
2409 enter a short register group name, go with the first
2410 group that matches. */
2411 if (strncmp (start
, reggroup_name (group
), end
- start
) == 0)
2419 regnum
< gdbarch_num_cooked_regs (gdbarch
);
2422 if (gdbarch_register_reggroup_p (gdbarch
, regnum
, group
))
2423 gdbarch_print_registers_info (gdbarch
,
2431 /* Nothing matched. */
2432 error (_("Invalid register `%.*s'"), (int) (end
- start
), start
);
2437 info_all_registers_command (const char *addr_exp
, int from_tty
)
2439 registers_info (addr_exp
, 1);
2443 info_registers_command (const char *addr_exp
, int from_tty
)
2445 registers_info (addr_exp
, 0);
2449 print_vector_info (struct ui_file
*file
,
2450 struct frame_info
*frame
, const char *args
)
2452 struct gdbarch
*gdbarch
= get_frame_arch (frame
);
2454 if (gdbarch_print_vector_info_p (gdbarch
))
2455 gdbarch_print_vector_info (gdbarch
, file
, frame
, args
);
2459 int printed_something
= 0;
2461 for (regnum
= 0; regnum
< gdbarch_num_cooked_regs (gdbarch
); regnum
++)
2463 if (gdbarch_register_reggroup_p (gdbarch
, regnum
, vector_reggroup
))
2465 printed_something
= 1;
2466 gdbarch_print_registers_info (gdbarch
, file
, frame
, regnum
, 1);
2469 if (!printed_something
)
2470 fprintf_filtered (file
, "No vector information\n");
2475 info_vector_command (const char *args
, int from_tty
)
2477 if (!target_has_registers
)
2478 error (_("The program has no registers now."));
2480 print_vector_info (gdb_stdout
, get_selected_frame (NULL
), args
);
2483 /* Kill the inferior process. Make us have no inferior. */
2486 kill_command (const char *arg
, int from_tty
)
2488 /* FIXME: This should not really be inferior_ptid (or target_has_execution).
2489 It should be a distinct flag that indicates that a target is active, cuz
2490 some targets don't have processes! */
2492 if (inferior_ptid
== null_ptid
)
2493 error (_("The program is not being run."));
2494 if (!query (_("Kill the program being debugged? ")))
2495 error (_("Not confirmed."));
2497 int pid
= current_inferior ()->pid
;
2498 /* Save the pid as a string before killing the inferior, since that
2499 may unpush the current target, and we need the string after. */
2500 std::string pid_str
= target_pid_to_str (ptid_t (pid
));
2501 int infnum
= current_inferior ()->num
;
2505 if (print_inferior_events
)
2506 printf_unfiltered (_("[Inferior %d (%s) killed]\n"),
2507 infnum
, pid_str
.c_str ());
2509 bfd_cache_close_all ();
2512 /* Used in `attach&' command. Proceed threads of inferior INF iff
2513 they stopped due to debugger request, and when they did, they
2514 reported a clean stop (GDB_SIGNAL_0). Do not proceed threads that
2515 have been explicitly been told to stop. */
2518 proceed_after_attach (inferior
*inf
)
2520 /* Don't error out if the current thread is running, because
2521 there may be other stopped threads. */
2523 /* Backup current thread and selected frame. */
2524 scoped_restore_current_thread restore_thread
;
2526 for (thread_info
*thread
: inf
->non_exited_threads ())
2527 if (!thread
->executing
2528 && !thread
->stop_requested
2529 && thread
->suspend
.stop_signal
== GDB_SIGNAL_0
)
2531 switch_to_thread (thread
);
2532 clear_proceed_status (0);
2533 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
2537 /* See inferior.h. */
2540 setup_inferior (int from_tty
)
2542 struct inferior
*inferior
;
2544 inferior
= current_inferior ();
2545 inferior
->needs_setup
= 0;
2547 /* If no exec file is yet known, try to determine it from the
2549 if (get_exec_file (0) == NULL
)
2550 exec_file_locate_attach (inferior_ptid
.pid (), 1, from_tty
);
2553 reopen_exec_file ();
2557 /* Take any necessary post-attaching actions for this platform. */
2558 target_post_attach (inferior_ptid
.pid ());
2560 post_create_inferior (current_top_target (), from_tty
);
2563 /* What to do after the first program stops after attaching. */
2564 enum attach_post_wait_mode
2566 /* Do nothing. Leaves threads as they are. */
2567 ATTACH_POST_WAIT_NOTHING
,
2569 /* Re-resume threads that are marked running. */
2570 ATTACH_POST_WAIT_RESUME
,
2572 /* Stop all threads. */
2573 ATTACH_POST_WAIT_STOP
,
2576 /* Called after we've attached to a process and we've seen it stop for
2577 the first time. If ASYNC_EXEC is true, re-resume threads that
2578 should be running. Else if ATTACH, */
2581 attach_post_wait (const char *args
, int from_tty
, enum attach_post_wait_mode mode
)
2583 struct inferior
*inferior
;
2585 inferior
= current_inferior ();
2586 inferior
->control
.stop_soon
= NO_STOP_QUIETLY
;
2588 if (inferior
->needs_setup
)
2589 setup_inferior (from_tty
);
2591 if (mode
== ATTACH_POST_WAIT_RESUME
)
2593 /* The user requested an `attach&', so be sure to leave threads
2594 that didn't get a signal running. */
2596 /* Immediatelly resume all suspended threads of this inferior,
2597 and this inferior only. This should have no effect on
2598 already running threads. If a thread has been stopped with a
2599 signal, leave it be. */
2601 proceed_after_attach (inferior
);
2604 if (inferior_thread ()->suspend
.stop_signal
== GDB_SIGNAL_0
)
2606 clear_proceed_status (0);
2607 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
2611 else if (mode
== ATTACH_POST_WAIT_STOP
)
2613 /* The user requested a plain `attach', so be sure to leave
2614 the inferior stopped. */
2616 /* At least the current thread is already stopped. */
2618 /* In all-stop, by definition, all threads have to be already
2619 stopped at this point. In non-stop, however, although the
2620 selected thread is stopped, others may still be executing.
2621 Be sure to explicitly stop all threads of the process. This
2622 should have no effect on already stopped threads. */
2624 target_stop (ptid_t (inferior
->pid
));
2625 else if (target_is_non_stop_p ())
2627 struct thread_info
*lowest
= inferior_thread ();
2629 stop_all_threads ();
2631 /* It's not defined which thread will report the attach
2632 stop. For consistency, always select the thread with
2633 lowest GDB number, which should be the main thread, if it
2635 for (thread_info
*thread
: current_inferior ()->non_exited_threads ())
2636 if (thread
->inf
->num
< lowest
->inf
->num
2637 || thread
->per_inf_num
< lowest
->per_inf_num
)
2640 switch_to_thread (lowest
);
2643 /* Tell the user/frontend where we're stopped. */
2645 if (deprecated_attach_hook
)
2646 deprecated_attach_hook ();
2650 struct attach_command_continuation_args
2654 enum attach_post_wait_mode mode
;
2658 attach_command_continuation (void *args
, int err
)
2660 struct attach_command_continuation_args
*a
2661 = (struct attach_command_continuation_args
*) args
;
2666 attach_post_wait (a
->args
, a
->from_tty
, a
->mode
);
2670 attach_command_continuation_free_args (void *args
)
2672 struct attach_command_continuation_args
*a
2673 = (struct attach_command_continuation_args
*) args
;
2679 /* "attach" command entry point. Takes a program started up outside
2680 of gdb and ``attaches'' to it. This stops it cold in its tracks
2681 and allows us to start debugging it. */
2684 attach_command (const char *args
, int from_tty
)
2687 struct target_ops
*attach_target
;
2688 struct inferior
*inferior
= current_inferior ();
2689 enum attach_post_wait_mode mode
;
2691 dont_repeat (); /* Not for the faint of heart */
2693 if (gdbarch_has_global_solist (target_gdbarch ()))
2694 /* Don't complain if all processes share the same symbol
2697 else if (target_has_execution
)
2699 if (query (_("A program is being debugged already. Kill it? ")))
2702 error (_("Not killed."));
2705 /* Clean up any leftovers from other runs. Some other things from
2706 this function should probably be moved into target_pre_inferior. */
2707 target_pre_inferior (from_tty
);
2709 gdb::unique_xmalloc_ptr
<char> stripped
= strip_bg_char (args
, &async_exec
);
2710 args
= stripped
.get ();
2712 attach_target
= find_attach_target ();
2714 prepare_execution_command (attach_target
, async_exec
);
2716 if (non_stop
&& !attach_target
->supports_non_stop ())
2717 error (_("Cannot attach to this target in non-stop mode"));
2719 attach_target
->attach (args
, from_tty
);
2720 /* to_attach should push the target, so after this point we
2721 shouldn't refer to attach_target again. */
2722 attach_target
= NULL
;
2724 /* Set up the "saved terminal modes" of the inferior
2725 based on what modes we are starting it with. */
2726 target_terminal::init ();
2728 /* Install inferior's terminal modes. This may look like a no-op,
2729 as we've just saved them above, however, this does more than
2730 restore terminal settings:
2732 - installs a SIGINT handler that forwards SIGINT to the inferior.
2733 Otherwise a Ctrl-C pressed just while waiting for the initial
2734 stop would end up as a spurious Quit.
2736 - removes stdin from the event loop, which we need if attaching
2737 in the foreground, otherwise on targets that report an initial
2738 stop on attach (which are most) we'd process input/commands
2739 while we're in the event loop waiting for that stop. That is,
2740 before the attach continuation runs and the command is really
2742 target_terminal::inferior ();
2744 /* Set up execution context to know that we should return from
2745 wait_for_inferior as soon as the target reports a stop. */
2746 init_wait_for_inferior ();
2747 clear_proceed_status (0);
2749 inferior
->needs_setup
= 1;
2751 if (target_is_non_stop_p ())
2753 /* If we find that the current thread isn't stopped, explicitly
2754 do so now, because we're going to install breakpoints and
2758 /* The user requested an `attach&'; stop just one thread. */
2759 target_stop (inferior_ptid
);
2761 /* The user requested an `attach', so stop all threads of this
2763 target_stop (ptid_t (inferior_ptid
.pid ()));
2766 mode
= async_exec
? ATTACH_POST_WAIT_RESUME
: ATTACH_POST_WAIT_STOP
;
2768 /* Some system don't generate traps when attaching to inferior.
2769 E.g. Mach 3 or GNU hurd. */
2770 if (!target_attach_no_wait ())
2772 struct attach_command_continuation_args
*a
;
2774 /* Careful here. See comments in inferior.h. Basically some
2775 OSes don't ignore SIGSTOPs on continue requests anymore. We
2776 need a way for handle_inferior_event to reset the stop_signal
2777 variable after an attach, and this is what
2778 STOP_QUIETLY_NO_SIGSTOP is for. */
2779 inferior
->control
.stop_soon
= STOP_QUIETLY_NO_SIGSTOP
;
2781 /* Wait for stop. */
2782 a
= XNEW (struct attach_command_continuation_args
);
2783 a
->args
= xstrdup (args
);
2784 a
->from_tty
= from_tty
;
2786 add_inferior_continuation (attach_command_continuation
, a
,
2787 attach_command_continuation_free_args
);
2789 if (!target_is_async_p ())
2790 mark_infrun_async_event_handler ();
2794 attach_post_wait (args
, from_tty
, mode
);
2797 /* We had just found out that the target was already attached to an
2798 inferior. PTID points at a thread of this new inferior, that is
2799 the most likely to be stopped right now, but not necessarily so.
2800 The new inferior is assumed to be already added to the inferior
2801 list at this point. If LEAVE_RUNNING, then leave the threads of
2802 this inferior running, except those we've explicitly seen reported
2806 notice_new_inferior (thread_info
*thr
, int leave_running
, int from_tty
)
2808 enum attach_post_wait_mode mode
2809 = leave_running
? ATTACH_POST_WAIT_RESUME
: ATTACH_POST_WAIT_NOTHING
;
2811 gdb::optional
<scoped_restore_current_thread
> restore_thread
;
2813 if (inferior_ptid
!= null_ptid
)
2814 restore_thread
.emplace ();
2816 /* Avoid reading registers -- we haven't fetched the target
2818 switch_to_thread_no_regs (thr
);
2820 /* When we "notice" a new inferior we need to do all the things we
2821 would normally do if we had just attached to it. */
2825 struct attach_command_continuation_args
*a
;
2826 struct inferior
*inferior
= current_inferior ();
2828 /* We're going to install breakpoints, and poke at memory,
2829 ensure that the inferior is stopped for a moment while we do
2831 target_stop (inferior_ptid
);
2833 inferior
->control
.stop_soon
= STOP_QUIETLY_REMOTE
;
2835 /* Wait for stop before proceeding. */
2836 a
= XNEW (struct attach_command_continuation_args
);
2837 a
->args
= xstrdup ("");
2838 a
->from_tty
= from_tty
;
2840 add_inferior_continuation (attach_command_continuation
, a
,
2841 attach_command_continuation_free_args
);
2846 attach_post_wait ("" /* args */, from_tty
, mode
);
2851 * takes a program previously attached to and detaches it.
2852 * The program resumes execution and will no longer stop
2853 * on signals, etc. We better not have left any breakpoints
2854 * in the program or it'll die when it hits one. For this
2855 * to work, it may be necessary for the process to have been
2856 * previously attached. It *might* work if the program was
2857 * started via the normal ptrace (PTRACE_TRACEME).
2861 detach_command (const char *args
, int from_tty
)
2863 dont_repeat (); /* Not for the faint of heart. */
2865 if (inferior_ptid
== null_ptid
)
2866 error (_("The program is not being run."));
2868 query_if_trace_running (from_tty
);
2870 disconnect_tracing ();
2872 target_detach (current_inferior (), from_tty
);
2874 /* The current inferior process was just detached successfully. Get
2875 rid of breakpoints that no longer make sense. Note we don't do
2876 this within target_detach because that is also used when
2877 following child forks, and in that case we will want to transfer
2878 breakpoints to the child, not delete them. */
2879 breakpoint_init_inferior (inf_exited
);
2881 /* If the solist is global across inferiors, don't clear it when we
2882 detach from a single inferior. */
2883 if (!gdbarch_has_global_solist (target_gdbarch ()))
2884 no_shared_libraries (NULL
, from_tty
);
2886 if (deprecated_detach_hook
)
2887 deprecated_detach_hook ();
2890 /* Disconnect from the current target without resuming it (leaving it
2891 waiting for a debugger).
2893 We'd better not have left any breakpoints in the program or the
2894 next debugger will get confused. Currently only supported for some
2895 remote targets, since the normal attach mechanisms don't work on
2896 stopped processes on some native platforms (e.g. GNU/Linux). */
2899 disconnect_command (const char *args
, int from_tty
)
2901 dont_repeat (); /* Not for the faint of heart. */
2902 query_if_trace_running (from_tty
);
2903 disconnect_tracing ();
2904 target_disconnect (args
, from_tty
);
2905 no_shared_libraries (NULL
, from_tty
);
2906 init_thread_list ();
2907 if (deprecated_detach_hook
)
2908 deprecated_detach_hook ();
2912 interrupt_target_1 (int all_threads
)
2917 ptid
= minus_one_ptid
;
2919 ptid
= inferior_ptid
;
2924 target_interrupt ();
2926 /* Tag the thread as having been explicitly requested to stop, so
2927 other parts of gdb know not to resume this thread automatically,
2928 if it was stopped due to an internal event. Limit this to
2929 non-stop mode, as when debugging a multi-threaded application in
2930 all-stop mode, we will only get one stop event --- it's undefined
2931 which thread will report the event. */
2933 set_stop_requested (ptid
, 1);
2937 Stop the execution of the target while running in async mode, in
2938 the background. In all-stop, stop the whole process. In non-stop
2939 mode, stop the current thread only by default, or stop all threads
2940 if the `-a' switch is used. */
2943 interrupt_command (const char *args
, int from_tty
)
2945 if (target_can_async_p ())
2947 int all_threads
= 0;
2949 dont_repeat (); /* Not for the faint of heart. */
2952 && startswith (args
, "-a"))
2955 if (!non_stop
&& all_threads
)
2956 error (_("-a is meaningless in all-stop mode."));
2958 interrupt_target_1 (all_threads
);
2962 /* See inferior.h. */
2965 default_print_float_info (struct gdbarch
*gdbarch
, struct ui_file
*file
,
2966 struct frame_info
*frame
, const char *args
)
2969 int printed_something
= 0;
2971 for (regnum
= 0; regnum
< gdbarch_num_cooked_regs (gdbarch
); regnum
++)
2973 if (gdbarch_register_reggroup_p (gdbarch
, regnum
, float_reggroup
))
2975 printed_something
= 1;
2976 gdbarch_print_registers_info (gdbarch
, file
, frame
, regnum
, 1);
2979 if (!printed_something
)
2980 fprintf_filtered (file
, "No floating-point info "
2981 "available for this processor.\n");
2985 info_float_command (const char *args
, int from_tty
)
2987 struct frame_info
*frame
;
2989 if (!target_has_registers
)
2990 error (_("The program has no registers now."));
2992 frame
= get_selected_frame (NULL
);
2993 gdbarch_print_float_info (get_frame_arch (frame
), gdb_stdout
, frame
, args
);
2997 unset_command (const char *args
, int from_tty
)
2999 printf_filtered (_("\"unset\" must be followed by the "
3000 "name of an unset subcommand.\n"));
3001 help_list (unsetlist
, "unset ", all_commands
, gdb_stdout
);
3004 /* Implement `info proc' family of commands. */
3007 info_proc_cmd_1 (const char *args
, enum info_proc_what what
, int from_tty
)
3009 struct gdbarch
*gdbarch
= get_current_arch ();
3011 if (!target_info_proc (args
, what
))
3013 if (gdbarch_info_proc_p (gdbarch
))
3014 gdbarch_info_proc (gdbarch
, args
, what
);
3016 error (_("Not supported on this target."));
3020 /* Implement `info proc' when given without any further parameters. */
3023 info_proc_cmd (const char *args
, int from_tty
)
3025 info_proc_cmd_1 (args
, IP_MINIMAL
, from_tty
);
3028 /* Implement `info proc mappings'. */
3031 info_proc_cmd_mappings (const char *args
, int from_tty
)
3033 info_proc_cmd_1 (args
, IP_MAPPINGS
, from_tty
);
3036 /* Implement `info proc stat'. */
3039 info_proc_cmd_stat (const char *args
, int from_tty
)
3041 info_proc_cmd_1 (args
, IP_STAT
, from_tty
);
3044 /* Implement `info proc status'. */
3047 info_proc_cmd_status (const char *args
, int from_tty
)
3049 info_proc_cmd_1 (args
, IP_STATUS
, from_tty
);
3052 /* Implement `info proc cwd'. */
3055 info_proc_cmd_cwd (const char *args
, int from_tty
)
3057 info_proc_cmd_1 (args
, IP_CWD
, from_tty
);
3060 /* Implement `info proc cmdline'. */
3063 info_proc_cmd_cmdline (const char *args
, int from_tty
)
3065 info_proc_cmd_1 (args
, IP_CMDLINE
, from_tty
);
3068 /* Implement `info proc exe'. */
3071 info_proc_cmd_exe (const char *args
, int from_tty
)
3073 info_proc_cmd_1 (args
, IP_EXE
, from_tty
);
3076 /* Implement `info proc files'. */
3079 info_proc_cmd_files (const char *args
, int from_tty
)
3081 info_proc_cmd_1 (args
, IP_FILES
, from_tty
);
3084 /* Implement `info proc all'. */
3087 info_proc_cmd_all (const char *args
, int from_tty
)
3089 info_proc_cmd_1 (args
, IP_ALL
, from_tty
);
3092 /* Implement `show print finish'. */
3095 show_print_finish (struct ui_file
*file
, int from_tty
,
3096 struct cmd_list_element
*c
,
3099 fprintf_filtered (file
, _("\
3100 Printing of return value after `finish' is %s.\n"),
3105 /* This help string is used for the run, start, and starti commands.
3106 It is defined as a macro to prevent duplication. */
3108 #define RUN_ARGS_HELP \
3109 "You may specify arguments to give it.\n\
3110 Args may include \"*\", or \"[...]\"; they are expanded using the\n\
3111 shell that will start the program (specified by the \"$SHELL\" environment\n\
3112 variable). Input and output redirection with \">\", \"<\", or \">>\"\n\
3113 are also allowed.\n\
3115 With no arguments, uses arguments last specified (with \"run\" or \n\
3116 \"set args\"). To cancel previous arguments and run with no arguments,\n\
3117 use \"set args\" without arguments.\n\
3119 To start the inferior without using a shell, use \"set startup-with-shell off\"."
3122 _initialize_infcmd (void)
3124 static struct cmd_list_element
*info_proc_cmdlist
;
3125 struct cmd_list_element
*c
= NULL
;
3126 const char *cmd_name
;
3128 /* Add the filename of the terminal connected to inferior I/O. */
3129 add_setshow_optional_filename_cmd ("inferior-tty", class_run
,
3130 &inferior_io_terminal_scratch
, _("\
3131 Set terminal for future runs of program being debugged."), _("\
3132 Show terminal for future runs of program being debugged."), _("\
3133 Usage: set inferior-tty [TTY]\n\n\
3134 If TTY is omitted, the default behavior of using the same terminal as GDB\n\
3136 set_inferior_tty_command
,
3137 show_inferior_tty_command
,
3138 &setlist
, &showlist
);
3139 cmd_name
= "inferior-tty";
3140 c
= lookup_cmd (&cmd_name
, setlist
, "", -1, 1);
3141 gdb_assert (c
!= NULL
);
3142 add_alias_cmd ("tty", c
, class_alias
, 0, &cmdlist
);
3145 add_setshow_string_noescape_cmd (cmd_name
, class_run
,
3146 &inferior_args_scratch
, _("\
3147 Set argument list to give program being debugged when it is started."), _("\
3148 Show argument list to give program being debugged when it is started."), _("\
3149 Follow this command with any number of args, to be passed to the program."),
3152 &setlist
, &showlist
);
3153 c
= lookup_cmd (&cmd_name
, setlist
, "", -1, 1);
3154 gdb_assert (c
!= NULL
);
3155 set_cmd_completer (c
, filename_completer
);
3158 add_setshow_string_noescape_cmd (cmd_name
, class_run
,
3159 &inferior_cwd_scratch
, _("\
3160 Set the current working directory to be used when the inferior is started.\n\
3161 Changing this setting does not have any effect on inferiors that are\n\
3164 Show the current working directory that is used when the inferior is started."),
3166 Use this command to change the current working directory that will be used\n\
3167 when the inferior is started. This setting does not affect GDB's current\n\
3168 working directory."),
3171 &setlist
, &showlist
);
3172 c
= lookup_cmd (&cmd_name
, setlist
, "", -1, 1);
3173 gdb_assert (c
!= NULL
);
3174 set_cmd_completer (c
, filename_completer
);
3176 c
= add_cmd ("environment", no_class
, environment_info
, _("\
3177 The environment to give the program, or one variable's value.\n\
3178 With an argument VAR, prints the value of environment variable VAR to\n\
3179 give the program being debugged. With no arguments, prints the entire\n\
3180 environment to be given to the program."), &showlist
);
3181 set_cmd_completer (c
, noop_completer
);
3183 add_prefix_cmd ("unset", no_class
, unset_command
,
3184 _("Complement to certain \"set\" commands."),
3185 &unsetlist
, "unset ", 0, &cmdlist
);
3187 c
= add_cmd ("environment", class_run
, unset_environment_command
, _("\
3188 Cancel environment variable VAR for the program.\n\
3189 This does not affect the program until the next \"run\" command."),
3191 set_cmd_completer (c
, noop_completer
);
3193 c
= add_cmd ("environment", class_run
, set_environment_command
, _("\
3194 Set environment variable value to give the program.\n\
3195 Arguments are VAR VALUE where VAR is variable name and VALUE is value.\n\
3196 VALUES of environment variables are uninterpreted strings.\n\
3197 This does not affect the program until the next \"run\" command."),
3199 set_cmd_completer (c
, noop_completer
);
3201 c
= add_com ("path", class_files
, path_command
, _("\
3202 Add directory DIR(s) to beginning of search path for object files.\n\
3203 $cwd in the path means the current working directory.\n\
3204 This path is equivalent to the $PATH shell variable. It is a list of\n\
3205 directories, separated by colons. These directories are searched to find\n\
3206 fully linked executable files and separately compiled object files as \
3208 set_cmd_completer (c
, filename_completer
);
3210 c
= add_cmd ("paths", no_class
, path_info
, _("\
3211 Current search path for finding object files.\n\
3212 $cwd in the path means the current working directory.\n\
3213 This path is equivalent to the $PATH shell variable. It is a list of\n\
3214 directories, separated by colons. These directories are searched to find\n\
3215 fully linked executable files and separately compiled object files as \
3218 set_cmd_completer (c
, noop_completer
);
3220 add_prefix_cmd ("kill", class_run
, kill_command
,
3221 _("Kill execution of program being debugged."),
3222 &killlist
, "kill ", 0, &cmdlist
);
3224 add_com ("attach", class_run
, attach_command
, _("\
3225 Attach to a process or file outside of GDB.\n\
3226 This command attaches to another target, of the same type as your last\n\
3227 \"target\" command (\"info files\" will show your target stack).\n\
3228 The command may take as argument a process id or a device file.\n\
3229 For a process id, you must have permission to send the process a signal,\n\
3230 and it must have the same effective uid as the debugger.\n\
3231 When using \"attach\" with a process id, the debugger finds the\n\
3232 program running in the process, looking first in the current working\n\
3233 directory, or (if not found there) using the source file search path\n\
3234 (see the \"directory\" command). You can also use the \"file\" command\n\
3235 to specify the program, and to load its symbol table."));
3237 add_prefix_cmd ("detach", class_run
, detach_command
, _("\
3238 Detach a process or file previously attached.\n\
3239 If a process, it is no longer traced, and it continues its execution. If\n\
3240 you were debugging a file, the file is closed and gdb no longer accesses it."),
3241 &detachlist
, "detach ", 0, &cmdlist
);
3243 add_com ("disconnect", class_run
, disconnect_command
, _("\
3244 Disconnect from a target.\n\
3245 The target will wait for another debugger to connect. Not available for\n\
3248 c
= add_com ("signal", class_run
, signal_command
, _("\
3249 Continue program with the specified signal.\n\
3250 Usage: signal SIGNAL\n\
3251 The SIGNAL argument is processed the same as the handle command.\n\
3253 An argument of \"0\" means continue the program without sending it a signal.\n\
3254 This is useful in cases where the program stopped because of a signal,\n\
3255 and you want to resume the program while discarding the signal.\n\
3257 In a multi-threaded program the signal is delivered to, or discarded from,\n\
3258 the current thread only."));
3259 set_cmd_completer (c
, signal_completer
);
3261 c
= add_com ("queue-signal", class_run
, queue_signal_command
, _("\
3262 Queue a signal to be delivered to the current thread when it is resumed.\n\
3263 Usage: queue-signal SIGNAL\n\
3264 The SIGNAL argument is processed the same as the handle command.\n\
3265 It is an error if the handling state of SIGNAL is \"nopass\".\n\
3267 An argument of \"0\" means remove any currently queued signal from\n\
3268 the current thread. This is useful in cases where the program stopped\n\
3269 because of a signal, and you want to resume it while discarding the signal.\n\
3271 In a multi-threaded program the signal is queued with, or discarded from,\n\
3272 the current thread only."));
3273 set_cmd_completer (c
, signal_completer
);
3275 add_com ("stepi", class_run
, stepi_command
, _("\
3276 Step one instruction exactly.\n\
3278 Argument N means step N times (or till program stops for another \
3280 add_com_alias ("si", "stepi", class_alias
, 0);
3282 add_com ("nexti", class_run
, nexti_command
, _("\
3283 Step one instruction, but proceed through subroutine calls.\n\
3285 Argument N means step N times (or till program stops for another \
3287 add_com_alias ("ni", "nexti", class_alias
, 0);
3289 add_com ("finish", class_run
, finish_command
, _("\
3290 Execute until selected stack frame returns.\n\
3292 Upon return, the value returned is printed and put in the value history."));
3293 add_com_alias ("fin", "finish", class_run
, 1);
3295 add_com ("next", class_run
, next_command
, _("\
3296 Step program, proceeding through subroutine calls.\n\
3298 Unlike \"step\", if the current source line calls a subroutine,\n\
3299 this command does not enter the subroutine, but instead steps over\n\
3300 the call, in effect treating it as a single source line."));
3301 add_com_alias ("n", "next", class_run
, 1);
3303 add_com ("step", class_run
, step_command
, _("\
3304 Step program until it reaches a different source line.\n\
3306 Argument N means step N times (or till program stops for another \
3308 add_com_alias ("s", "step", class_run
, 1);
3310 c
= add_com ("until", class_run
, until_command
, _("\
3311 Execute until past the current line or past a LOCATION.\n\
3312 Execute until the program reaches a source line greater than the current\n\
3313 or a specified location (same args as break command) within the current \
3315 set_cmd_completer (c
, location_completer
);
3316 add_com_alias ("u", "until", class_run
, 1);
3318 c
= add_com ("advance", class_run
, advance_command
, _("\
3319 Continue the program up to the given location (same form as args for break \
3321 Execution will also stop upon exit from the current stack frame."));
3322 set_cmd_completer (c
, location_completer
);
3324 c
= add_com ("jump", class_run
, jump_command
, _("\
3325 Continue program being debugged at specified line or address.\n\
3326 Usage: jump LOCATION\n\
3327 Give as argument either LINENUM or *ADDR, where ADDR is an expression\n\
3328 for an address to start at."));
3329 set_cmd_completer (c
, location_completer
);
3330 add_com_alias ("j", "jump", class_run
, 1);
3332 add_com ("continue", class_run
, continue_command
, _("\
3333 Continue program being debugged, after signal or breakpoint.\n\
3334 Usage: continue [N]\n\
3335 If proceeding from breakpoint, a number N may be used as an argument,\n\
3336 which means to set the ignore count of that breakpoint to N - 1 (so that\n\
3337 the breakpoint won't break until the Nth time it is reached).\n\
3339 If non-stop mode is enabled, continue only the current thread,\n\
3340 otherwise all the threads in the program are continued. To \n\
3341 continue all stopped threads in non-stop mode, use the -a option.\n\
3342 Specifying -a and an ignore count simultaneously is an error."));
3343 add_com_alias ("c", "cont", class_run
, 1);
3344 add_com_alias ("fg", "cont", class_run
, 1);
3346 c
= add_com ("run", class_run
, run_command
, _("\
3347 Start debugged program.\n"
3349 set_cmd_completer (c
, filename_completer
);
3350 add_com_alias ("r", "run", class_run
, 1);
3352 c
= add_com ("start", class_run
, start_command
, _("\
3353 Start the debugged program stopping at the beginning of the main procedure.\n"
3355 set_cmd_completer (c
, filename_completer
);
3357 c
= add_com ("starti", class_run
, starti_command
, _("\
3358 Start the debugged program stopping at the first instruction.\n"
3360 set_cmd_completer (c
, filename_completer
);
3362 add_com ("interrupt", class_run
, interrupt_command
,
3363 _("Interrupt the execution of the debugged program.\n\
3364 If non-stop mode is enabled, interrupt only the current thread,\n\
3365 otherwise all the threads in the program are stopped. To \n\
3366 interrupt all running threads in non-stop mode, use the -a option."));
3368 c
= add_info ("registers", info_registers_command
, _("\
3369 List of integer registers and their contents, for selected stack frame.\n\
3370 One or more register names as argument means describe the given registers.\n\
3371 One or more register group names as argument means describe the registers\n\
3372 in the named register groups."));
3373 add_info_alias ("r", "registers", 1);
3374 set_cmd_completer (c
, reg_or_group_completer
);
3376 c
= add_info ("all-registers", info_all_registers_command
, _("\
3377 List of all registers and their contents, for selected stack frame.\n\
3378 One or more register names as argument means describe the given registers.\n\
3379 One or more register group names as argument means describe the registers\n\
3380 in the named register groups."));
3381 set_cmd_completer (c
, reg_or_group_completer
);
3383 add_info ("program", info_program_command
,
3384 _("Execution status of the program."));
3386 add_info ("float", info_float_command
,
3387 _("Print the status of the floating point unit."));
3389 add_info ("vector", info_vector_command
,
3390 _("Print the status of the vector unit."));
3392 add_prefix_cmd ("proc", class_info
, info_proc_cmd
,
3394 Show additional information about a process.\n\
3395 Specify any process id, or use the program being debugged by default."),
3396 &info_proc_cmdlist
, "info proc ",
3397 1/*allow-unknown*/, &infolist
);
3399 add_cmd ("mappings", class_info
, info_proc_cmd_mappings
, _("\
3400 List memory regions mapped by the specified process."),
3401 &info_proc_cmdlist
);
3403 add_cmd ("stat", class_info
, info_proc_cmd_stat
, _("\
3404 List process info from /proc/PID/stat."),
3405 &info_proc_cmdlist
);
3407 add_cmd ("status", class_info
, info_proc_cmd_status
, _("\
3408 List process info from /proc/PID/status."),
3409 &info_proc_cmdlist
);
3411 add_cmd ("cwd", class_info
, info_proc_cmd_cwd
, _("\
3412 List current working directory of the specified process."),
3413 &info_proc_cmdlist
);
3415 add_cmd ("cmdline", class_info
, info_proc_cmd_cmdline
, _("\
3416 List command line arguments of the specified process."),
3417 &info_proc_cmdlist
);
3419 add_cmd ("exe", class_info
, info_proc_cmd_exe
, _("\
3420 List absolute filename for executable of the specified process."),
3421 &info_proc_cmdlist
);
3423 add_cmd ("files", class_info
, info_proc_cmd_files
, _("\
3424 List files opened by the specified process."),
3425 &info_proc_cmdlist
);
3427 add_cmd ("all", class_info
, info_proc_cmd_all
, _("\
3428 List all available info about the specified process."),
3429 &info_proc_cmdlist
);
3431 add_setshow_boolean_cmd ("finish", class_support
,
3432 &user_print_options
.finish_print
, _("\
3433 Set whether `finish' prints the return value."), _("\
3434 Show whether `finish' prints the return value."), NULL
,
3437 &setprintlist
, &showprintlist
);