1 /* Memory-access and commands for "inferior" process, for GDB.
3 Copyright (C) 1986-2021 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"
51 #include "thread-fsm.h"
55 #include "gdbsupport/gdb_optional.h"
57 #include "cli/cli-style.h"
59 /* Local functions: */
61 static void until_next_command (int);
63 static void step_1 (int, int, const char *);
65 #define ERROR_NO_INFERIOR \
66 if (!target_has_execution ()) error (_("The program is not being run."));
68 /* Scratch area where string containing arguments to give to the
69 program will be stored by 'set args'. As soon as anything is
70 stored, notice_args_set will move it into per-inferior storage.
71 Arguments are separated by spaces. Empty string (pointer to '\0')
74 static char *inferior_args_scratch
;
76 /* Scratch area where the new cwd will be stored by 'set cwd'. */
78 static char *inferior_cwd_scratch
;
80 /* Scratch area where 'set inferior-tty' will store user-provided value.
81 We'll immediate copy it into per-inferior storage. */
83 static char *inferior_io_terminal_scratch
;
85 /* Pid of our debugged inferior, or 0 if no inferior now.
86 Since various parts of infrun.c test this to see whether there is a program
87 being debugged it should be nonzero (currently 3 is used) for remote
92 /* Nonzero if stopped due to completion of a stack dummy routine. */
94 enum stop_stack_kind stop_stack_dummy
;
96 /* Nonzero if stopped due to a random (unexpected) signal in inferior
99 int stopped_by_random_signal
;
104 set_inferior_tty_command (const char *args
, int from_tty
,
105 struct cmd_list_element
*c
)
107 /* CLI has assigned the user-provided value to inferior_io_terminal_scratch.
108 Now route it to current inferior. */
109 current_inferior ()->set_tty (inferior_io_terminal_scratch
);
113 show_inferior_tty_command (struct ui_file
*file
, int from_tty
,
114 struct cmd_list_element
*c
, const char *value
)
116 /* Note that we ignore the passed-in value in favor of computing it
118 const char *inferior_tty
= current_inferior ()->tty ();
120 if (inferior_tty
== nullptr)
122 fprintf_filtered (gdb_stdout
,
123 _("Terminal for future runs of program being debugged "
124 "is \"%s\".\n"), inferior_tty
);
128 get_inferior_args (void)
130 if (current_inferior ()->argc
!= 0)
132 gdb::array_view
<char * const> args (current_inferior ()->argv
,
133 current_inferior ()->argc
);
134 std::string n
= construct_inferior_arguments (args
);
135 set_inferior_args (n
.c_str ());
138 if (current_inferior ()->args
== NULL
)
139 current_inferior ()->args
= make_unique_xstrdup ("");
141 return current_inferior ()->args
.get ();
144 /* Set the arguments for the current inferior. Ownership of
145 NEWARGS is not transferred. */
148 set_inferior_args (const char *newargs
)
150 if (newargs
!= nullptr)
151 current_inferior ()->args
= make_unique_xstrdup (newargs
);
153 current_inferior ()->args
.reset ();
155 current_inferior ()->argc
= 0;
156 current_inferior ()->argv
= 0;
160 set_inferior_args_vector (int argc
, char **argv
)
162 current_inferior ()->argc
= argc
;
163 current_inferior ()->argv
= argv
;
166 /* Notice when `set args' is run. */
169 set_args_command (const char *args
, int from_tty
, struct cmd_list_element
*c
)
171 /* CLI has assigned the user-provided value to inferior_args_scratch.
172 Now route it to current inferior. */
173 set_inferior_args (inferior_args_scratch
);
176 /* Notice when `show args' is run. */
179 show_args_command (struct ui_file
*file
, int from_tty
,
180 struct cmd_list_element
*c
, const char *value
)
182 /* Note that we ignore the passed-in value in favor of computing it
184 deprecated_show_value_hack (file
, from_tty
, c
, get_inferior_args ());
187 /* See gdbsupport/common-inferior.h. */
190 set_inferior_cwd (const char *cwd
)
192 struct inferior
*inf
= current_inferior ();
194 gdb_assert (inf
!= NULL
);
199 inf
->cwd
.reset (xstrdup (cwd
));
202 /* See gdbsupport/common-inferior.h. */
207 return current_inferior ()->cwd
.get ();
210 /* Handle the 'set cwd' command. */
213 set_cwd_command (const char *args
, int from_tty
, struct cmd_list_element
*c
)
215 if (*inferior_cwd_scratch
== '\0')
216 set_inferior_cwd (NULL
);
218 set_inferior_cwd (inferior_cwd_scratch
);
221 /* Handle the 'show cwd' command. */
224 show_cwd_command (struct ui_file
*file
, int from_tty
,
225 struct cmd_list_element
*c
, const char *value
)
227 const char *cwd
= get_inferior_cwd ();
230 fprintf_filtered (gdb_stdout
,
232 You have not set the inferior's current working directory.\n\
233 The inferior will inherit GDB's cwd if native debugging, or the remote\n\
234 server's cwd if remote debugging.\n"));
236 fprintf_filtered (gdb_stdout
,
237 _("Current working directory that will be used "
238 "when starting the inferior is \"%s\".\n"), cwd
);
242 /* This function strips the '&' character (indicating background
243 execution) that is added as *the last* of the arguments ARGS of a
244 command. A copy of the incoming ARGS without the '&' is returned,
245 unless the resulting string after stripping is empty, in which case
246 NULL is returned. *BG_CHAR_P is an output boolean that indicates
247 whether the '&' character was found. */
249 static gdb::unique_xmalloc_ptr
<char>
250 strip_bg_char (const char *args
, int *bg_char_p
)
254 if (args
== NULL
|| *args
== '\0')
260 p
= args
+ strlen (args
);
264 while (p
> args
&& isspace (p
[-1]))
269 return gdb::unique_xmalloc_ptr
<char>
270 (savestring (args
, p
- args
));
272 return gdb::unique_xmalloc_ptr
<char> (nullptr);
276 return make_unique_xstrdup (args
);
279 /* Common actions to take after creating any sort of inferior, by any
280 means (running, attaching, connecting, et cetera). The target
281 should be stopped. */
284 post_create_inferior (int from_tty
)
287 /* Be sure we own the terminal in case write operations are performed. */
288 target_terminal::ours_for_output ();
290 /* If the target hasn't taken care of this already, do it now.
291 Targets which need to access registers during to_open,
292 to_create_inferior, or to_attach should do it earlier; but many
294 target_find_description ();
296 /* Now that we know the register layout, retrieve current PC. But
297 if the PC is unavailable (e.g., we're opening a core file with
298 missing registers info), ignore it. */
299 thread_info
*thr
= inferior_thread ();
301 thr
->suspend
.stop_pc
= 0;
304 regcache
*rc
= get_thread_regcache (thr
);
305 thr
->suspend
.stop_pc
= regcache_read_pc (rc
);
307 catch (const gdb_exception_error
&ex
)
309 if (ex
.error
!= NOT_AVAILABLE_ERROR
)
313 if (current_program_space
->exec_bfd ())
315 const unsigned solib_add_generation
316 = current_program_space
->solib_add_generation
;
318 scoped_restore restore_in_initial_library_scan
319 = make_scoped_restore (¤t_inferior ()->in_initial_library_scan
,
322 /* Create the hooks to handle shared library load and unload
324 solib_create_inferior_hook (from_tty
);
326 if (current_program_space
->solib_add_generation
== solib_add_generation
)
328 /* The platform-specific hook should load initial shared libraries,
329 but didn't. FROM_TTY will be incorrectly 0 but such solib
330 targets should be fixed anyway. Call it only after the solib
331 target has been initialized by solib_create_inferior_hook. */
334 warning (_("platform-specific solib_create_inferior_hook did "
335 "not load initial shared libraries."));
337 /* If the solist is global across processes, there's no need to
339 if (!gdbarch_has_global_solist (target_gdbarch ()))
340 solib_add (NULL
, 0, auto_solib_add
);
344 /* If the user sets watchpoints before execution having started,
345 then she gets software watchpoints, because GDB can't know which
346 target will end up being pushed, or if it supports hardware
347 watchpoints or not. breakpoint_re_set takes care of promoting
348 watchpoints to hardware watchpoints if possible, however, if this
349 new inferior doesn't load shared libraries or we don't pull in
350 symbols from any other source on this target/arch,
351 breakpoint_re_set is never called. Call it now so that software
352 watchpoints get a chance to be promoted to hardware watchpoints
353 if the now pushed target supports hardware watchpoints. */
354 breakpoint_re_set ();
356 gdb::observers::inferior_created
.notify (current_inferior ());
359 /* Kill the inferior if already running. This function is designed
360 to be called when we are about to start the execution of the program
361 from the beginning. Ask the user to confirm that he wants to restart
362 the program being debugged when FROM_TTY is non-null. */
365 kill_if_already_running (int from_tty
)
367 if (inferior_ptid
!= null_ptid
&& target_has_execution ())
369 /* Bail out before killing the program if we will not be able to
371 target_require_runnable ();
374 && !query (_("The program being debugged has been started already.\n\
375 Start it from the beginning? ")))
376 error (_("Program not restarted."));
381 /* See inferior.h. */
384 prepare_execution_command (struct target_ops
*target
, int background
)
386 /* If we get a request for running in the bg but the target
387 doesn't support it, error out. */
388 if (background
&& !target
->can_async_p ())
389 error (_("Asynchronous execution not supported on this target."));
393 /* If we get a request for running in the fg, then we need to
394 simulate synchronous (fg) execution. Note no cleanup is
395 necessary for this. stdin is re-enabled whenever an error
396 reaches the top level. */
397 all_uis_on_sync_execution_starting ();
401 /* Determine how the new inferior will behave. */
405 /* Run program without any explicit stop during startup. */
408 /* Stop at the beginning of the program's main function. */
411 /* Stop at the first instruction of the program. */
412 RUN_STOP_AT_FIRST_INSN
415 /* Implement the "run" command. Force a stop during program start if
416 requested by RUN_HOW. */
419 run_command_1 (const char *args
, int from_tty
, enum run_how run_how
)
421 const char *exec_file
;
422 struct ui_out
*uiout
= current_uiout
;
423 struct target_ops
*run_target
;
428 scoped_disable_commit_resumed
disable_commit_resumed ("running");
430 kill_if_already_running (from_tty
);
432 init_wait_for_inferior ();
433 clear_breakpoint_hit_counts ();
435 /* Clean up any leftovers from other runs. Some other things from
436 this function should probably be moved into target_pre_inferior. */
437 target_pre_inferior (from_tty
);
439 /* The comment here used to read, "The exec file is re-read every
440 time we do a generic_mourn_inferior, so we just have to worry
441 about the symbol file." The `generic_mourn_inferior' function
442 gets called whenever the program exits. However, suppose the
443 program exits, and *then* the executable file changes? We need
444 to check again here. Since reopen_exec_file doesn't do anything
445 if the timestamp hasn't changed, I don't see the harm. */
449 gdb::unique_xmalloc_ptr
<char> stripped
= strip_bg_char (args
, &async_exec
);
450 args
= stripped
.get ();
452 /* Do validation and preparation before possibly changing anything
455 run_target
= find_run_target ();
457 prepare_execution_command (run_target
, async_exec
);
459 if (non_stop
&& !run_target
->supports_non_stop ())
460 error (_("The target does not support running in non-stop mode."));
462 /* Done. Can now set breakpoints, change inferior args, etc. */
464 /* Insert temporary breakpoint in main function if requested. */
465 if (run_how
== RUN_STOP_AT_MAIN
)
467 std::string arg
= string_printf ("-qualified %s", main_name ());
468 tbreak_command (arg
.c_str (), 0);
471 exec_file
= get_exec_file (0);
473 /* We keep symbols from add-symbol-file, on the grounds that the
474 user might want to add some symbols before running the program
475 (right?). But sometimes (dynamic loading where the user manually
476 introduces the new symbols with add-symbol-file), the code which
477 the symbols describe does not persist between runs. Currently
478 the user has to manually nuke all symbols between runs if they
479 want them to go away (PR 2207). This is probably reasonable. */
481 /* If there were other args, beside '&', process them. */
483 set_inferior_args (args
);
487 uiout
->field_string (NULL
, "Starting program");
490 uiout
->field_string ("execfile", exec_file
);
492 /* We call get_inferior_args() because we might need to compute
494 uiout
->field_string ("infargs", get_inferior_args ());
499 /* We call get_inferior_args() because we might need to compute
501 run_target
->create_inferior (exec_file
,
502 std::string (get_inferior_args ()),
503 current_inferior ()->environment
.envp (),
505 /* to_create_inferior should push the target, so after this point we
506 shouldn't refer to run_target again. */
509 /* We're starting off a new process. When we get out of here, in
510 non-stop mode, finish the state of all threads of that process,
511 but leave other threads alone, as they may be stopped in internal
512 events --- the frontend shouldn't see them as stopped. In
513 all-stop, always finish the state of all threads, as we may be
514 resuming more than just the new process. */
515 process_stratum_target
*finish_target
;
519 finish_target
= current_inferior ()->process_target ();
520 finish_ptid
= ptid_t (current_inferior ()->pid
);
524 finish_target
= nullptr;
525 finish_ptid
= minus_one_ptid
;
527 scoped_finish_thread_state
finish_state (finish_target
, finish_ptid
);
529 /* Pass zero for FROM_TTY, because at this point the "run" command
530 has done its thing; now we are setting up the running program. */
531 post_create_inferior (0);
533 /* Queue a pending event so that the program stops immediately. */
534 if (run_how
== RUN_STOP_AT_FIRST_INSN
)
536 thread_info
*thr
= inferior_thread ();
537 thr
->suspend
.waitstatus_pending_p
= 1;
538 thr
->suspend
.waitstatus
.kind
= TARGET_WAITKIND_STOPPED
;
539 thr
->suspend
.waitstatus
.value
.sig
= GDB_SIGNAL_0
;
542 /* Start the target running. Do not use -1 continuation as it would skip
543 breakpoint right at the entry point. */
544 proceed (regcache_read_pc (get_current_regcache ()), GDB_SIGNAL_0
);
546 /* Since there was no error, there's no need to finish the thread
548 finish_state
.release ();
550 disable_commit_resumed
.reset_and_commit ();
554 run_command (const char *args
, int from_tty
)
556 run_command_1 (args
, from_tty
, RUN_NORMAL
);
559 /* Start the execution of the program up until the beginning of the main
563 start_command (const char *args
, int from_tty
)
565 /* Some languages such as Ada need to search inside the program
566 minimal symbols for the location where to put the temporary
567 breakpoint before starting. */
568 if (!have_minimal_symbols ())
569 error (_("No symbol table loaded. Use the \"file\" command."));
571 /* Run the program until reaching the main procedure... */
572 run_command_1 (args
, from_tty
, RUN_STOP_AT_MAIN
);
575 /* Start the execution of the program stopping at the first
579 starti_command (const char *args
, int from_tty
)
581 run_command_1 (args
, from_tty
, RUN_STOP_AT_FIRST_INSN
);
585 proceed_thread_callback (struct thread_info
*thread
, void *arg
)
587 /* We go through all threads individually instead of compressing
588 into a single target `resume_all' request, because some threads
589 may be stopped in internal breakpoints/events, or stopped waiting
590 for its turn in the displaced stepping queue (that is, they are
591 running && !executing). The target side has no idea about why
592 the thread is stopped, so a `resume_all' command would resume too
593 much. If/when GDB gains a way to tell the target `hold this
594 thread stopped until I say otherwise', then we can optimize
596 if (thread
->state
!= THREAD_STOPPED
)
599 if (!thread
->inf
->has_execution ())
602 switch_to_thread (thread
);
603 clear_proceed_status (0);
604 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
609 ensure_valid_thread (void)
611 if (inferior_ptid
== null_ptid
612 || inferior_thread ()->state
== THREAD_EXITED
)
613 error (_("Cannot execute this command without a live selected thread."));
616 /* If the user is looking at trace frames, any resumption of execution
617 is likely to mix up recorded and live target data. So simply
618 disallow those commands. */
621 ensure_not_tfind_mode (void)
623 if (get_traceframe_number () >= 0)
624 error (_("Cannot execute this command while looking at trace frames."));
627 /* Throw an error indicating the current thread is running. */
630 error_is_running (void)
632 error (_("Cannot execute this command while "
633 "the selected thread is running."));
636 /* Calls error_is_running if the current thread is running. */
639 ensure_not_running (void)
641 if (inferior_thread ()->state
== THREAD_RUNNING
)
646 continue_1 (int all_threads
)
649 ensure_not_tfind_mode ();
651 if (non_stop
&& all_threads
)
653 /* Don't error out if the current thread is running, because
654 there may be other stopped threads. */
656 /* Backup current thread and selected frame and restore on scope
658 scoped_restore_current_thread restore_thread
;
660 iterate_over_threads (proceed_thread_callback
, NULL
);
662 if (current_ui
->prompt_state
== PROMPT_BLOCKED
)
664 /* If all threads in the target were already running,
665 proceed_thread_callback ends up never calling proceed,
666 and so nothing calls this to put the inferior's terminal
667 settings in effect and remove stdin from the event loop,
668 which we must when running a foreground command. E.g.:
672 <all threads are running now>
675 <no thread was resumed, but the inferior now owns the terminal>
677 target_terminal::inferior ();
682 ensure_valid_thread ();
683 ensure_not_running ();
684 clear_proceed_status (0);
685 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
689 /* continue [-a] [proceed-count] [&] */
692 continue_command (const char *args
, int from_tty
)
695 bool all_threads_p
= false;
699 /* Find out whether we must run in the background. */
700 gdb::unique_xmalloc_ptr
<char> stripped
= strip_bg_char (args
, &async_exec
);
701 args
= stripped
.get ();
705 if (startswith (args
, "-a"))
707 all_threads_p
= true;
708 args
+= sizeof ("-a") - 1;
714 if (!non_stop
&& all_threads_p
)
715 error (_("`-a' is meaningless in all-stop mode."));
717 if (args
!= NULL
&& all_threads_p
)
718 error (_("Can't resume all threads and specify "
719 "proceed count simultaneously."));
721 /* If we have an argument left, set proceed count of breakpoint we
728 struct thread_info
*tp
;
731 tp
= inferior_thread ();
734 process_stratum_target
*last_target
;
737 get_last_target_status (&last_target
, &last_ptid
, nullptr);
738 tp
= find_thread_ptid (last_target
, last_ptid
);
741 bs
= tp
->control
.stop_bpstat
;
743 while ((stat
= bpstat_num (&bs
, &num
)) != 0)
746 set_ignore_count (num
,
747 parse_and_eval_long (args
) - 1,
749 /* set_ignore_count prints a message ending with a period.
750 So print two spaces before "Continuing.". */
752 printf_filtered (" ");
756 if (!stopped
&& from_tty
)
759 ("Not stopped at any breakpoint; argument ignored.\n");
764 ensure_not_tfind_mode ();
766 if (!non_stop
|| !all_threads_p
)
768 ensure_valid_thread ();
769 ensure_not_running ();
772 prepare_execution_command (current_inferior ()->top_target (), async_exec
);
775 printf_filtered (_("Continuing.\n"));
777 continue_1 (all_threads_p
);
780 /* Record in TP the starting point of a "step" or "next" command. */
783 set_step_frame (thread_info
*tp
)
785 /* This can be removed once this function no longer implicitly relies on the
786 inferior_ptid value. */
787 gdb_assert (inferior_ptid
== tp
->ptid
);
789 frame_info
*frame
= get_current_frame ();
791 symtab_and_line sal
= find_frame_sal (frame
);
792 set_step_info (tp
, frame
, sal
);
794 CORE_ADDR pc
= get_frame_pc (frame
);
795 tp
->control
.step_start_function
= find_pc_function (pc
);
798 /* Step until outside of current statement. */
801 step_command (const char *count_string
, int from_tty
)
803 step_1 (0, 0, count_string
);
806 /* Likewise, but skip over subroutine calls as if single instructions. */
809 next_command (const char *count_string
, int from_tty
)
811 step_1 (1, 0, count_string
);
814 /* Likewise, but step only one instruction. */
817 stepi_command (const char *count_string
, int from_tty
)
819 step_1 (0, 1, count_string
);
823 nexti_command (const char *count_string
, int from_tty
)
825 step_1 (1, 1, count_string
);
828 /* Data for the FSM that manages the step/next/stepi/nexti
831 struct step_command_fsm
: public thread_fsm
833 /* How many steps left in a "step N"-like command. */
836 /* If true, this is a next/nexti, otherwise a step/stepi. */
837 int skip_subroutines
;
839 /* If true, this is a stepi/nexti, otherwise a step/step. */
842 explicit step_command_fsm (struct interp
*cmd_interp
)
843 : thread_fsm (cmd_interp
)
847 void clean_up (struct thread_info
*thread
) override
;
848 bool should_stop (struct thread_info
*thread
) override
;
849 enum async_reply_reason
do_async_reply_reason () override
;
852 /* Prepare for a step/next/etc. command. Any target resource
853 allocated here is undone in the FSM's clean_up method. */
856 step_command_fsm_prepare (struct step_command_fsm
*sm
,
857 int skip_subroutines
, int single_inst
,
858 int count
, struct thread_info
*thread
)
860 sm
->skip_subroutines
= skip_subroutines
;
861 sm
->single_inst
= single_inst
;
864 /* Leave the si command alone. */
865 if (!sm
->single_inst
|| sm
->skip_subroutines
)
866 set_longjmp_breakpoint (thread
, get_frame_id (get_current_frame ()));
868 thread
->control
.stepping_command
= 1;
871 static int prepare_one_step (thread_info
*, struct step_command_fsm
*sm
);
874 step_1 (int skip_subroutines
, int single_inst
, const char *count_string
)
878 struct thread_info
*thr
;
879 struct step_command_fsm
*step_sm
;
882 ensure_not_tfind_mode ();
883 ensure_valid_thread ();
884 ensure_not_running ();
886 gdb::unique_xmalloc_ptr
<char> stripped
887 = strip_bg_char (count_string
, &async_exec
);
888 count_string
= stripped
.get ();
890 prepare_execution_command (current_inferior ()->top_target (), async_exec
);
892 count
= count_string
? parse_and_eval_long (count_string
) : 1;
894 clear_proceed_status (1);
896 /* Setup the execution command state machine to handle all the COUNT
898 thr
= inferior_thread ();
899 step_sm
= new step_command_fsm (command_interp ());
900 thr
->thread_fsm
= step_sm
;
902 step_command_fsm_prepare (step_sm
, skip_subroutines
,
903 single_inst
, count
, thr
);
905 /* Do only one step for now, before returning control to the event
906 loop. Let the continuation figure out how many other steps we
907 need to do, and handle them one at the time, through
909 if (!prepare_one_step (thr
, step_sm
))
910 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
915 /* Stepped into an inline frame. Pretend that we've
917 thr
->thread_fsm
->clean_up (thr
);
918 proceeded
= normal_stop ();
920 inferior_event_handler (INF_EXEC_COMPLETE
);
921 all_uis_check_sync_execution_done ();
925 /* Implementation of the 'should_stop' FSM method for stepping
926 commands. Called after we are done with one step operation, to
927 check whether we need to step again, before we print the prompt and
928 return control to the user. If count is > 1, returns false, as we
929 will need to keep going. */
932 step_command_fsm::should_stop (struct thread_info
*tp
)
934 if (tp
->control
.stop_step
)
936 /* There are more steps to make, and we did stop due to
937 ending a stepping range. Do another step. */
939 return prepare_one_step (tp
, this);
947 /* Implementation of the 'clean_up' FSM method for stepping commands. */
950 step_command_fsm::clean_up (struct thread_info
*thread
)
952 if (!single_inst
|| skip_subroutines
)
953 delete_longjmp_breakpoint (thread
->global_num
);
956 /* Implementation of the 'async_reply_reason' FSM method for stepping
959 enum async_reply_reason
960 step_command_fsm::do_async_reply_reason ()
962 return EXEC_ASYNC_END_STEPPING_RANGE
;
965 /* Prepare for one step in "step N". The actual target resumption is
966 done by the caller. Return true if we're done and should thus
967 report a stop to the user. Returns false if the target needs to be
971 prepare_one_step (thread_info
*tp
, struct step_command_fsm
*sm
)
973 /* This can be removed once this function no longer implicitly relies on the
974 inferior_ptid value. */
975 gdb_assert (inferior_ptid
== tp
->ptid
);
979 struct frame_info
*frame
= get_current_frame ();
983 if (!sm
->single_inst
)
987 /* Step at an inlined function behaves like "down". */
988 if (!sm
->skip_subroutines
989 && inline_skipped_frames (tp
))
992 const char *fn
= NULL
;
996 /* Pretend that we've ran. */
997 resume_ptid
= user_visible_resume_ptid (1);
998 set_running (tp
->inf
->process_target (), resume_ptid
, true);
1000 step_into_inline_frame (tp
);
1002 frame
= get_current_frame ();
1003 sal
= find_frame_sal (frame
);
1004 sym
= get_frame_function (frame
);
1007 fn
= sym
->print_name ();
1010 || !function_name_is_marked_for_skip (fn
, sal
))
1013 return prepare_one_step (tp
, sm
);
1017 pc
= get_frame_pc (frame
);
1018 find_pc_line_pc_range (pc
,
1019 &tp
->control
.step_range_start
,
1020 &tp
->control
.step_range_end
);
1022 /* There's a problem in gcc (PR gcc/98780) that causes missing line
1023 table entries, which results in a too large stepping range.
1024 Use inlined_subroutine info to make the range more narrow. */
1025 if (inline_skipped_frames (tp
) > 0)
1027 symbol
*sym
= inline_skipped_symbol (tp
);
1028 if (SYMBOL_CLASS (sym
) == LOC_BLOCK
)
1030 const block
*block
= SYMBOL_BLOCK_VALUE (sym
);
1031 if (BLOCK_END (block
) < tp
->control
.step_range_end
)
1032 tp
->control
.step_range_end
= BLOCK_END (block
);
1036 tp
->control
.may_range_step
= 1;
1038 /* If we have no line info, switch to stepi mode. */
1039 if (tp
->control
.step_range_end
== 0 && step_stop_if_no_debug
)
1041 tp
->control
.step_range_start
= tp
->control
.step_range_end
= 1;
1042 tp
->control
.may_range_step
= 0;
1044 else if (tp
->control
.step_range_end
== 0)
1048 if (find_pc_partial_function (pc
, &name
,
1049 &tp
->control
.step_range_start
,
1050 &tp
->control
.step_range_end
) == 0)
1051 error (_("Cannot find bounds of current function"));
1053 target_terminal::ours_for_output ();
1054 printf_filtered (_("Single stepping until exit from function %s,"
1055 "\nwhich has no line number information.\n"),
1061 /* Say we are stepping, but stop after one insn whatever it does. */
1062 tp
->control
.step_range_start
= tp
->control
.step_range_end
= 1;
1063 if (!sm
->skip_subroutines
)
1065 Don't step over function calls, not even to functions lacking
1067 tp
->control
.step_over_calls
= STEP_OVER_NONE
;
1070 if (sm
->skip_subroutines
)
1071 tp
->control
.step_over_calls
= STEP_OVER_ALL
;
1077 sm
->set_finished ();
1082 /* Continue program at specified address. */
1085 jump_command (const char *arg
, int from_tty
)
1087 struct gdbarch
*gdbarch
= get_current_arch ();
1094 ensure_not_tfind_mode ();
1095 ensure_valid_thread ();
1096 ensure_not_running ();
1098 /* Find out whether we must run in the background. */
1099 gdb::unique_xmalloc_ptr
<char> stripped
= strip_bg_char (arg
, &async_exec
);
1100 arg
= stripped
.get ();
1102 prepare_execution_command (current_inferior ()->top_target (), async_exec
);
1105 error_no_arg (_("starting address"));
1107 std::vector
<symtab_and_line
> sals
1108 = decode_line_with_last_displayed (arg
, DECODE_LINE_FUNFIRSTLINE
);
1109 if (sals
.size () != 1)
1110 error (_("Unreasonable jump request"));
1112 symtab_and_line
&sal
= sals
[0];
1114 if (sal
.symtab
== 0 && sal
.pc
== 0)
1115 error (_("No source file has been specified."));
1117 resolve_sal_pc (&sal
); /* May error out. */
1119 /* See if we are trying to jump to another function. */
1120 fn
= get_frame_function (get_current_frame ());
1121 sfn
= find_pc_function (sal
.pc
);
1122 if (fn
!= NULL
&& sfn
!= fn
)
1124 if (!query (_("Line %d is not in `%s'. Jump anyway? "), sal
.line
,
1127 error (_("Not confirmed."));
1134 struct obj_section
*section
;
1136 fixup_symbol_section (sfn
, 0);
1137 section
= sfn
->obj_section (symbol_objfile (sfn
));
1138 if (section_is_overlay (section
)
1139 && !section_is_mapped (section
))
1141 if (!query (_("WARNING!!! Destination is in "
1142 "unmapped overlay! Jump anyway? ")))
1144 error (_("Not confirmed."));
1154 printf_filtered (_("Continuing at "));
1155 fputs_filtered (paddress (gdbarch
, addr
), gdb_stdout
);
1156 printf_filtered (".\n");
1159 clear_proceed_status (0);
1160 proceed (addr
, GDB_SIGNAL_0
);
1163 /* Continue program giving it specified signal. */
1166 signal_command (const char *signum_exp
, int from_tty
)
1168 enum gdb_signal oursig
;
1171 dont_repeat (); /* Too dangerous. */
1173 ensure_not_tfind_mode ();
1174 ensure_valid_thread ();
1175 ensure_not_running ();
1177 /* Find out whether we must run in the background. */
1178 gdb::unique_xmalloc_ptr
<char> stripped
1179 = strip_bg_char (signum_exp
, &async_exec
);
1180 signum_exp
= stripped
.get ();
1182 prepare_execution_command (current_inferior ()->top_target (), async_exec
);
1185 error_no_arg (_("signal number"));
1187 /* It would be even slicker to make signal names be valid expressions,
1188 (the type could be "enum $signal" or some such), then the user could
1189 assign them to convenience variables. */
1190 oursig
= gdb_signal_from_name (signum_exp
);
1192 if (oursig
== GDB_SIGNAL_UNKNOWN
)
1194 /* No, try numeric. */
1195 int num
= parse_and_eval_long (signum_exp
);
1198 oursig
= GDB_SIGNAL_0
;
1200 oursig
= gdb_signal_from_command (num
);
1203 /* Look for threads other than the current that this command ends up
1204 resuming too (due to schedlock off), and warn if they'll get a
1205 signal delivered. "signal 0" is used to suppress a previous
1206 signal, but if the current thread is no longer the one that got
1207 the signal, then the user is potentially suppressing the signal
1208 of the wrong thread. */
1211 int must_confirm
= 0;
1213 /* This indicates what will be resumed. Either a single thread,
1214 a whole process, or all threads of all processes. */
1215 ptid_t resume_ptid
= user_visible_resume_ptid (0);
1216 process_stratum_target
*resume_target
1217 = user_visible_resume_target (resume_ptid
);
1219 thread_info
*current
= inferior_thread ();
1221 for (thread_info
*tp
: all_non_exited_threads (resume_target
, resume_ptid
))
1226 if (tp
->suspend
.stop_signal
!= GDB_SIGNAL_0
1227 && signal_pass_state (tp
->suspend
.stop_signal
))
1230 printf_unfiltered (_("Note:\n"));
1231 printf_unfiltered (_(" Thread %s previously stopped with signal %s, %s.\n"),
1232 print_thread_id (tp
),
1233 gdb_signal_to_name (tp
->suspend
.stop_signal
),
1234 gdb_signal_to_string (tp
->suspend
.stop_signal
));
1240 && !query (_("Continuing thread %s (the current thread) with specified signal will\n"
1241 "still deliver the signals noted above to their respective threads.\n"
1242 "Continue anyway? "),
1243 print_thread_id (inferior_thread ())))
1244 error (_("Not confirmed."));
1249 if (oursig
== GDB_SIGNAL_0
)
1250 printf_filtered (_("Continuing with no signal.\n"));
1252 printf_filtered (_("Continuing with signal %s.\n"),
1253 gdb_signal_to_name (oursig
));
1256 clear_proceed_status (0);
1257 proceed ((CORE_ADDR
) -1, oursig
);
1260 /* Queue a signal to be delivered to the current thread. */
1263 queue_signal_command (const char *signum_exp
, int from_tty
)
1265 enum gdb_signal oursig
;
1266 struct thread_info
*tp
;
1269 ensure_not_tfind_mode ();
1270 ensure_valid_thread ();
1271 ensure_not_running ();
1273 if (signum_exp
== NULL
)
1274 error_no_arg (_("signal number"));
1276 /* It would be even slicker to make signal names be valid expressions,
1277 (the type could be "enum $signal" or some such), then the user could
1278 assign them to convenience variables. */
1279 oursig
= gdb_signal_from_name (signum_exp
);
1281 if (oursig
== GDB_SIGNAL_UNKNOWN
)
1283 /* No, try numeric. */
1284 int num
= parse_and_eval_long (signum_exp
);
1287 oursig
= GDB_SIGNAL_0
;
1289 oursig
= gdb_signal_from_command (num
);
1292 if (oursig
!= GDB_SIGNAL_0
1293 && !signal_pass_state (oursig
))
1294 error (_("Signal handling set to not pass this signal to the program."));
1296 tp
= inferior_thread ();
1297 tp
->suspend
.stop_signal
= oursig
;
1300 /* Data for the FSM that manages the until (with no argument)
1303 struct until_next_fsm
: public thread_fsm
1305 /* The thread that as current when the command was executed. */
1308 until_next_fsm (struct interp
*cmd_interp
, int thread
)
1309 : thread_fsm (cmd_interp
),
1314 bool should_stop (struct thread_info
*thread
) override
;
1315 void clean_up (struct thread_info
*thread
) override
;
1316 enum async_reply_reason
do_async_reply_reason () override
;
1319 /* Implementation of the 'should_stop' FSM method for the until (with
1323 until_next_fsm::should_stop (struct thread_info
*tp
)
1325 if (tp
->control
.stop_step
)
1331 /* Implementation of the 'clean_up' FSM method for the until (with no
1335 until_next_fsm::clean_up (struct thread_info
*thread
)
1337 delete_longjmp_breakpoint (thread
->global_num
);
1340 /* Implementation of the 'async_reply_reason' FSM method for the until
1341 (with no arg) command. */
1343 enum async_reply_reason
1344 until_next_fsm::do_async_reply_reason ()
1346 return EXEC_ASYNC_END_STEPPING_RANGE
;
1349 /* Proceed until we reach a different source line with pc greater than
1350 our current one or exit the function. We skip calls in both cases.
1352 Note that eventually this command should probably be changed so
1353 that only source lines are printed out when we hit the breakpoint
1354 we set. This may involve changes to wait_for_inferior and the
1355 proceed status code. */
1358 until_next_command (int from_tty
)
1360 struct frame_info
*frame
;
1362 struct symbol
*func
;
1363 struct symtab_and_line sal
;
1364 struct thread_info
*tp
= inferior_thread ();
1365 int thread
= tp
->global_num
;
1366 struct until_next_fsm
*sm
;
1368 clear_proceed_status (0);
1369 set_step_frame (tp
);
1371 frame
= get_current_frame ();
1373 /* Step until either exited from this function or greater
1374 than the current line (if in symbolic section) or pc (if
1377 pc
= get_frame_pc (frame
);
1378 func
= find_pc_function (pc
);
1382 struct bound_minimal_symbol msymbol
= lookup_minimal_symbol_by_pc (pc
);
1384 if (msymbol
.minsym
== NULL
)
1385 error (_("Execution is not within a known function."));
1387 tp
->control
.step_range_start
= BMSYMBOL_VALUE_ADDRESS (msymbol
);
1388 /* The upper-bound of step_range is exclusive. In order to make PC
1389 within the range, set the step_range_end with PC + 1. */
1390 tp
->control
.step_range_end
= pc
+ 1;
1394 sal
= find_pc_line (pc
, 0);
1396 tp
->control
.step_range_start
= BLOCK_ENTRY_PC (SYMBOL_BLOCK_VALUE (func
));
1397 tp
->control
.step_range_end
= sal
.end
;
1399 tp
->control
.may_range_step
= 1;
1401 tp
->control
.step_over_calls
= STEP_OVER_ALL
;
1403 set_longjmp_breakpoint (tp
, get_frame_id (frame
));
1404 delete_longjmp_breakpoint_cleanup
lj_deleter (thread
);
1406 sm
= new until_next_fsm (command_interp (), tp
->global_num
);
1407 tp
->thread_fsm
= sm
;
1408 lj_deleter
.release ();
1410 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
1414 until_command (const char *arg
, int from_tty
)
1419 ensure_not_tfind_mode ();
1420 ensure_valid_thread ();
1421 ensure_not_running ();
1423 /* Find out whether we must run in the background. */
1424 gdb::unique_xmalloc_ptr
<char> stripped
= strip_bg_char (arg
, &async_exec
);
1425 arg
= stripped
.get ();
1427 prepare_execution_command (current_inferior ()->top_target (), async_exec
);
1430 until_break_command (arg
, from_tty
, 0);
1432 until_next_command (from_tty
);
1436 advance_command (const char *arg
, int from_tty
)
1441 ensure_not_tfind_mode ();
1442 ensure_valid_thread ();
1443 ensure_not_running ();
1446 error_no_arg (_("a location"));
1448 /* Find out whether we must run in the background. */
1449 gdb::unique_xmalloc_ptr
<char> stripped
= strip_bg_char (arg
, &async_exec
);
1450 arg
= stripped
.get ();
1452 prepare_execution_command (current_inferior ()->top_target (), async_exec
);
1454 until_break_command (arg
, from_tty
, 1);
1457 /* Return the value of the result of a function at the end of a 'finish'
1458 command/BP. DTOR_DATA (if not NULL) can represent inferior registers
1459 right after an inferior call has finished. */
1462 get_return_value (struct value
*function
, struct type
*value_type
)
1464 regcache
*stop_regs
= get_current_regcache ();
1465 struct gdbarch
*gdbarch
= stop_regs
->arch ();
1466 struct value
*value
;
1468 value_type
= check_typedef (value_type
);
1469 gdb_assert (value_type
->code () != TYPE_CODE_VOID
);
1471 /* FIXME: 2003-09-27: When returning from a nested inferior function
1472 call, it's possible (with no help from the architecture vector)
1473 to locate and return/print a "struct return" value. This is just
1474 a more complicated case of what is already being done in the
1475 inferior function call code. In fact, when inferior function
1476 calls are made async, this will likely be made the norm. */
1478 switch (gdbarch_return_value (gdbarch
, function
, value_type
,
1481 case RETURN_VALUE_REGISTER_CONVENTION
:
1482 case RETURN_VALUE_ABI_RETURNS_ADDRESS
:
1483 case RETURN_VALUE_ABI_PRESERVES_ADDRESS
:
1484 value
= allocate_value (value_type
);
1485 gdbarch_return_value (gdbarch
, function
, value_type
, stop_regs
,
1486 value_contents_raw (value
), NULL
);
1488 case RETURN_VALUE_STRUCT_CONVENTION
:
1492 internal_error (__FILE__
, __LINE__
, _("bad switch"));
1498 /* The captured function return value/type and its position in the
1501 struct return_value_info
1503 /* The captured return value. May be NULL if we weren't able to
1504 retrieve it. See get_return_value. */
1505 struct value
*value
;
1507 /* The return type. In some cases, we'll not be able extract the
1508 return value, but we always know the type. */
1511 /* If we captured a value, this is the value history index. */
1512 int value_history_index
;
1515 /* Helper for print_return_value. */
1518 print_return_value_1 (struct ui_out
*uiout
, struct return_value_info
*rv
)
1520 if (rv
->value
!= NULL
)
1522 struct value_print_options opts
;
1525 uiout
->text ("Value returned is ");
1526 uiout
->field_fmt ("gdb-result-var", "$%d",
1527 rv
->value_history_index
);
1528 uiout
->text (" = ");
1529 get_user_print_options (&opts
);
1531 if (opts
.finish_print
)
1534 value_print (rv
->value
, &stb
, &opts
);
1535 uiout
->field_stream ("return-value", stb
);
1538 uiout
->field_string ("return-value", _("<not displayed>"),
1539 metadata_style
.style ());
1544 std::string type_name
= type_to_string (rv
->type
);
1545 uiout
->text ("Value returned has type: ");
1546 uiout
->field_string ("return-type", type_name
);
1548 uiout
->text (" Cannot determine contents\n");
1552 /* Print the result of a function at the end of a 'finish' command.
1553 RV points at an object representing the captured return value/type
1554 and its position in the value history. */
1557 print_return_value (struct ui_out
*uiout
, struct return_value_info
*rv
)
1559 if (rv
->type
== NULL
1560 || check_typedef (rv
->type
)->code () == TYPE_CODE_VOID
)
1565 /* print_return_value_1 can throw an exception in some
1566 circumstances. We need to catch this so that we still
1567 delete the breakpoint. */
1568 print_return_value_1 (uiout
, rv
);
1570 catch (const gdb_exception
&ex
)
1572 exception_print (gdb_stdout
, ex
);
1576 /* Data for the FSM that manages the finish command. */
1578 struct finish_command_fsm
: public thread_fsm
1580 /* The momentary breakpoint set at the function's return address in
1582 breakpoint_up breakpoint
;
1584 /* The function that we're stepping out of. */
1585 struct symbol
*function
= nullptr;
1587 /* If the FSM finishes successfully, this stores the function's
1589 struct return_value_info return_value_info
{};
1591 explicit finish_command_fsm (struct interp
*cmd_interp
)
1592 : thread_fsm (cmd_interp
)
1596 bool should_stop (struct thread_info
*thread
) override
;
1597 void clean_up (struct thread_info
*thread
) override
;
1598 struct return_value_info
*return_value () override
;
1599 enum async_reply_reason
do_async_reply_reason () override
;
1602 /* Implementation of the 'should_stop' FSM method for the finish
1603 commands. Detects whether the thread stepped out of the function
1604 successfully, and if so, captures the function's return value and
1605 marks the FSM finished. */
1608 finish_command_fsm::should_stop (struct thread_info
*tp
)
1610 struct return_value_info
*rv
= &return_value_info
;
1612 if (function
!= NULL
1613 && bpstat_find_breakpoint (tp
->control
.stop_bpstat
,
1614 breakpoint
.get ()) != NULL
)
1619 rv
->type
= TYPE_TARGET_TYPE (SYMBOL_TYPE (function
));
1620 if (rv
->type
== NULL
)
1621 internal_error (__FILE__
, __LINE__
,
1622 _("finish_command: function has no target type"));
1624 if (check_typedef (rv
->type
)->code () != TYPE_CODE_VOID
)
1628 func
= read_var_value (function
, NULL
, get_current_frame ());
1629 rv
->value
= get_return_value (func
, rv
->type
);
1630 if (rv
->value
!= NULL
)
1631 rv
->value_history_index
= record_latest_value (rv
->value
);
1634 else if (tp
->control
.stop_step
)
1636 /* Finishing from an inline frame, or reverse finishing. In
1637 either case, there's no way to retrieve the return value. */
1644 /* Implementation of the 'clean_up' FSM method for the finish
1648 finish_command_fsm::clean_up (struct thread_info
*thread
)
1650 breakpoint
.reset ();
1651 delete_longjmp_breakpoint (thread
->global_num
);
1654 /* Implementation of the 'return_value' FSM method for the finish
1657 struct return_value_info
*
1658 finish_command_fsm::return_value ()
1660 return &return_value_info
;
1663 /* Implementation of the 'async_reply_reason' FSM method for the
1666 enum async_reply_reason
1667 finish_command_fsm::do_async_reply_reason ()
1669 if (execution_direction
== EXEC_REVERSE
)
1670 return EXEC_ASYNC_END_STEPPING_RANGE
;
1672 return EXEC_ASYNC_FUNCTION_FINISHED
;
1675 /* finish_backward -- helper function for finish_command. */
1678 finish_backward (struct finish_command_fsm
*sm
)
1680 struct symtab_and_line sal
;
1681 struct thread_info
*tp
= inferior_thread ();
1683 CORE_ADDR func_addr
;
1685 pc
= get_frame_pc (get_current_frame ());
1687 if (find_pc_partial_function (pc
, NULL
, &func_addr
, NULL
) == 0)
1688 error (_("Cannot find bounds of current function"));
1690 sal
= find_pc_line (func_addr
, 0);
1692 tp
->control
.proceed_to_finish
= 1;
1693 /* Special case: if we're sitting at the function entry point,
1694 then all we need to do is take a reverse singlestep. We
1695 don't need to set a breakpoint, and indeed it would do us
1698 Note that this can only happen at frame #0, since there's
1699 no way that a function up the stack can have a return address
1700 that's equal to its entry point. */
1704 struct frame_info
*frame
= get_selected_frame (NULL
);
1705 struct gdbarch
*gdbarch
= get_frame_arch (frame
);
1707 /* Set a step-resume at the function's entry point. Once that's
1708 hit, we'll do one more step backwards. */
1709 symtab_and_line sr_sal
;
1711 sr_sal
.pspace
= get_frame_program_space (frame
);
1712 insert_step_resume_breakpoint_at_sal (gdbarch
,
1713 sr_sal
, null_frame_id
);
1715 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
1719 /* We're almost there -- we just need to back up by one more
1721 tp
->control
.step_range_start
= tp
->control
.step_range_end
= 1;
1722 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
1726 /* finish_forward -- helper function for finish_command. FRAME is the
1727 frame that called the function we're about to step out of. */
1730 finish_forward (struct finish_command_fsm
*sm
, struct frame_info
*frame
)
1732 struct frame_id frame_id
= get_frame_id (frame
);
1733 struct gdbarch
*gdbarch
= get_frame_arch (frame
);
1734 struct symtab_and_line sal
;
1735 struct thread_info
*tp
= inferior_thread ();
1737 sal
= find_pc_line (get_frame_pc (frame
), 0);
1738 sal
.pc
= get_frame_pc (frame
);
1740 sm
->breakpoint
= set_momentary_breakpoint (gdbarch
, sal
,
1741 get_stack_frame_id (frame
),
1744 /* set_momentary_breakpoint invalidates FRAME. */
1747 set_longjmp_breakpoint (tp
, frame_id
);
1749 /* We want to print return value, please... */
1750 tp
->control
.proceed_to_finish
= 1;
1752 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
1755 /* Skip frames for "finish". */
1757 static struct frame_info
*
1758 skip_finish_frames (struct frame_info
*frame
)
1760 struct frame_info
*start
;
1766 frame
= skip_tailcall_frames (frame
);
1770 frame
= skip_unwritable_frames (frame
);
1774 while (start
!= frame
);
1779 /* "finish": Set a temporary breakpoint at the place the selected
1780 frame will return to, then continue. */
1783 finish_command (const char *arg
, int from_tty
)
1785 struct frame_info
*frame
;
1787 struct finish_command_fsm
*sm
;
1788 struct thread_info
*tp
;
1791 ensure_not_tfind_mode ();
1792 ensure_valid_thread ();
1793 ensure_not_running ();
1795 /* Find out whether we must run in the background. */
1796 gdb::unique_xmalloc_ptr
<char> stripped
= strip_bg_char (arg
, &async_exec
);
1797 arg
= stripped
.get ();
1799 prepare_execution_command (current_inferior ()->top_target (), async_exec
);
1802 error (_("The \"finish\" command does not take any arguments."));
1804 frame
= get_prev_frame (get_selected_frame (_("No selected frame.")));
1806 error (_("\"finish\" not meaningful in the outermost frame."));
1808 clear_proceed_status (0);
1810 tp
= inferior_thread ();
1812 sm
= new finish_command_fsm (command_interp ());
1814 tp
->thread_fsm
= sm
;
1816 /* Finishing from an inline frame is completely different. We don't
1817 try to show the "return value" - no way to locate it. */
1818 if (get_frame_type (get_selected_frame (_("No selected frame.")))
1821 /* Claim we are stepping in the calling frame. An empty step
1822 range means that we will stop once we aren't in a function
1823 called by that frame. We don't use the magic "1" value for
1824 step_range_end, because then infrun will think this is nexti,
1825 and not step over the rest of this inlined function call. */
1826 set_step_info (tp
, frame
, {});
1827 tp
->control
.step_range_start
= get_frame_pc (frame
);
1828 tp
->control
.step_range_end
= tp
->control
.step_range_start
;
1829 tp
->control
.step_over_calls
= STEP_OVER_ALL
;
1831 /* Print info on the selected frame, including level number but not
1835 printf_filtered (_("Run till exit from "));
1836 print_stack_frame (get_selected_frame (NULL
), 1, LOCATION
, 0);
1839 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
1843 /* Find the function we will return from. */
1845 sm
->function
= find_pc_function (get_frame_pc (get_selected_frame (NULL
)));
1847 /* Print info on the selected frame, including level number but not
1851 if (execution_direction
== EXEC_REVERSE
)
1852 printf_filtered (_("Run back to call of "));
1855 if (sm
->function
!= NULL
&& TYPE_NO_RETURN (sm
->function
->type
)
1856 && !query (_("warning: Function %s does not return normally.\n"
1857 "Try to finish anyway? "),
1858 sm
->function
->print_name ()))
1859 error (_("Not confirmed."));
1860 printf_filtered (_("Run till exit from "));
1863 print_stack_frame (get_selected_frame (NULL
), 1, LOCATION
, 0);
1866 if (execution_direction
== EXEC_REVERSE
)
1867 finish_backward (sm
);
1870 frame
= skip_finish_frames (frame
);
1873 error (_("Cannot find the caller frame."));
1875 finish_forward (sm
, frame
);
1881 info_program_command (const char *args
, int from_tty
)
1886 process_stratum_target
*proc_target
;
1888 if (!target_has_execution ())
1890 printf_filtered (_("The program being debugged is not being run.\n"));
1896 ptid
= inferior_ptid
;
1897 proc_target
= current_inferior ()->process_target ();
1900 get_last_target_status (&proc_target
, &ptid
, nullptr);
1902 if (ptid
== null_ptid
|| ptid
== minus_one_ptid
)
1903 error (_("No selected thread."));
1905 thread_info
*tp
= find_thread_ptid (proc_target
, ptid
);
1907 if (tp
->state
== THREAD_EXITED
)
1908 error (_("Invalid selected thread."));
1909 else if (tp
->state
== THREAD_RUNNING
)
1910 error (_("Selected thread is running."));
1912 bs
= tp
->control
.stop_bpstat
;
1913 stat
= bpstat_num (&bs
, &num
);
1915 target_files_info ();
1916 printf_filtered (_("Program stopped at %s.\n"),
1917 paddress (target_gdbarch (), tp
->suspend
.stop_pc
));
1918 if (tp
->control
.stop_step
)
1919 printf_filtered (_("It stopped after being stepped.\n"));
1922 /* There may be several breakpoints in the same place, so this
1923 isn't as strange as it seems. */
1928 printf_filtered (_("It stopped at a breakpoint "
1929 "that has since been deleted.\n"));
1932 printf_filtered (_("It stopped at breakpoint %d.\n"), num
);
1933 stat
= bpstat_num (&bs
, &num
);
1936 else if (tp
->suspend
.stop_signal
!= GDB_SIGNAL_0
)
1938 printf_filtered (_("It stopped with signal %s, %s.\n"),
1939 gdb_signal_to_name (tp
->suspend
.stop_signal
),
1940 gdb_signal_to_string (tp
->suspend
.stop_signal
));
1945 printf_filtered (_("Type \"info stack\" or \"info "
1946 "registers\" for more information.\n"));
1951 environment_info (const char *var
, int from_tty
)
1955 const char *val
= current_inferior ()->environment
.get (var
);
1959 puts_filtered (var
);
1960 puts_filtered (" = ");
1961 puts_filtered (val
);
1962 puts_filtered ("\n");
1966 puts_filtered ("Environment variable \"");
1967 puts_filtered (var
);
1968 puts_filtered ("\" not defined.\n");
1973 char **envp
= current_inferior ()->environment
.envp ();
1975 for (int idx
= 0; envp
[idx
] != NULL
; ++idx
)
1977 puts_filtered (envp
[idx
]);
1978 puts_filtered ("\n");
1984 set_environment_command (const char *arg
, int from_tty
)
1986 const char *p
, *val
;
1990 error_no_arg (_("environment variable and value"));
1992 /* Find separation between variable name and value. */
1993 p
= (char *) strchr (arg
, '=');
1994 val
= (char *) strchr (arg
, ' ');
1996 if (p
!= 0 && val
!= 0)
1998 /* We have both a space and an equals. If the space is before the
1999 equals, walk forward over the spaces til we see a nonspace
2000 (possibly the equals). */
2005 /* Now if the = is after the char following the spaces,
2006 take the char following the spaces. */
2010 else if (val
!= 0 && p
== 0)
2014 error_no_arg (_("environment variable to set"));
2016 if (p
== 0 || p
[1] == 0)
2020 p
= arg
+ strlen (arg
); /* So that savestring below will work. */
2024 /* Not setting variable value to null. */
2026 while (*val
== ' ' || *val
== '\t')
2030 while (p
!= arg
&& (p
[-1] == ' ' || p
[-1] == '\t'))
2033 std::string
var (arg
, p
- arg
);
2036 printf_filtered (_("Setting environment variable "
2037 "\"%s\" to null value.\n"),
2039 current_inferior ()->environment
.set (var
.c_str (), "");
2042 current_inferior ()->environment
.set (var
.c_str (), val
);
2046 unset_environment_command (const char *var
, int from_tty
)
2050 /* If there is no argument, delete all environment variables.
2051 Ask for confirmation if reading from the terminal. */
2052 if (!from_tty
|| query (_("Delete all environment variables? ")))
2053 current_inferior ()->environment
.clear ();
2056 current_inferior ()->environment
.unset (var
);
2059 /* Handle the execution path (PATH variable). */
2061 static const char path_var_name
[] = "PATH";
2064 path_info (const char *args
, int from_tty
)
2066 puts_filtered ("Executable and object file path: ");
2067 puts_filtered (current_inferior ()->environment
.get (path_var_name
));
2068 puts_filtered ("\n");
2071 /* Add zero or more directories to the front of the execution path. */
2074 path_command (const char *dirname
, int from_tty
)
2080 env
= current_inferior ()->environment
.get (path_var_name
);
2081 /* Can be null if path is not set. */
2084 exec_path
= xstrdup (env
);
2085 mod_path (dirname
, &exec_path
);
2086 current_inferior ()->environment
.set (path_var_name
, exec_path
);
2089 path_info (NULL
, from_tty
);
2094 pad_to_column (string_file
&stream
, int col
)
2096 /* At least one space must be printed to separate columns. */
2098 const int size
= stream
.size ();
2100 stream
.puts (n_spaces (col
- size
));
2103 /* Print out the register NAME with value VAL, to FILE, in the default
2107 default_print_one_register_info (struct ui_file
*file
,
2111 struct type
*regtype
= value_type (val
);
2112 int print_raw_format
;
2113 string_file format_stream
;
2116 value_column_1
= 15,
2117 /* Give enough room for "0x", 16 hex digits and two spaces in
2118 preceding column. */
2119 value_column_2
= value_column_1
+ 2 + 16 + 2,
2122 format_stream
.puts (name
);
2123 pad_to_column (format_stream
, value_column_1
);
2125 print_raw_format
= (value_entirely_available (val
)
2126 && !value_optimized_out (val
));
2128 /* If virtual format is floating, print it that way, and in raw
2130 if (regtype
->code () == TYPE_CODE_FLT
2131 || regtype
->code () == TYPE_CODE_DECFLOAT
)
2133 struct value_print_options opts
;
2134 const gdb_byte
*valaddr
= value_contents_for_printing (val
);
2135 enum bfd_endian byte_order
= type_byte_order (regtype
);
2137 get_user_print_options (&opts
);
2140 common_val_print (val
, &format_stream
, 0, &opts
, current_language
);
2142 if (print_raw_format
)
2144 pad_to_column (format_stream
, value_column_2
);
2145 format_stream
.puts ("(raw ");
2146 print_hex_chars (&format_stream
, valaddr
, TYPE_LENGTH (regtype
),
2148 format_stream
.putc (')');
2153 struct value_print_options opts
;
2155 /* Print the register in hex. */
2156 get_formatted_print_options (&opts
, 'x');
2158 common_val_print (val
, &format_stream
, 0, &opts
, current_language
);
2159 /* If not a vector register, print it also according to its
2161 if (print_raw_format
&& regtype
->is_vector () == 0)
2163 pad_to_column (format_stream
, value_column_2
);
2164 get_user_print_options (&opts
);
2166 common_val_print (val
, &format_stream
, 0, &opts
, current_language
);
2170 fputs_filtered (format_stream
.c_str (), file
);
2171 fprintf_filtered (file
, "\n");
2174 /* Print out the machine register regnum. If regnum is -1, print all
2175 registers (print_all == 1) or all non-float and non-vector
2176 registers (print_all == 0).
2178 For most machines, having all_registers_info() print the
2179 register(s) one per line is good enough. If a different format is
2180 required, (eg, for MIPS or Pyramid 90x, which both have lots of
2181 regs), or there is an existing convention for showing all the
2182 registers, define the architecture method PRINT_REGISTERS_INFO to
2183 provide that format. */
2186 default_print_registers_info (struct gdbarch
*gdbarch
,
2187 struct ui_file
*file
,
2188 struct frame_info
*frame
,
2189 int regnum
, int print_all
)
2192 const int numregs
= gdbarch_num_cooked_regs (gdbarch
);
2194 for (i
= 0; i
< numregs
; i
++)
2196 /* Decide between printing all regs, non-float / vector regs, or
2202 if (!gdbarch_register_reggroup_p (gdbarch
, i
, all_reggroup
))
2207 if (!gdbarch_register_reggroup_p (gdbarch
, i
, general_reggroup
))
2217 /* If the register name is empty, it is undefined for this
2218 processor, so don't display anything. */
2219 if (gdbarch_register_name (gdbarch
, i
) == NULL
2220 || *(gdbarch_register_name (gdbarch
, i
)) == '\0')
2223 default_print_one_register_info (file
,
2224 gdbarch_register_name (gdbarch
, i
),
2225 value_of_register (i
, frame
));
2230 registers_info (const char *addr_exp
, int fpregs
)
2232 struct frame_info
*frame
;
2233 struct gdbarch
*gdbarch
;
2235 if (!target_has_registers ())
2236 error (_("The program has no registers now."));
2237 frame
= get_selected_frame (NULL
);
2238 gdbarch
= get_frame_arch (frame
);
2242 gdbarch_print_registers_info (gdbarch
, gdb_stdout
,
2247 while (*addr_exp
!= '\0')
2252 /* Skip leading white space. */
2253 addr_exp
= skip_spaces (addr_exp
);
2255 /* Discard any leading ``$''. Check that there is something
2256 resembling a register following it. */
2257 if (addr_exp
[0] == '$')
2259 if (isspace ((*addr_exp
)) || (*addr_exp
) == '\0')
2260 error (_("Missing register name"));
2262 /* Find the start/end of this register name/num/group. */
2264 while ((*addr_exp
) != '\0' && !isspace ((*addr_exp
)))
2268 /* Figure out what we've found and display it. */
2270 /* A register name? */
2272 int regnum
= user_reg_map_name_to_regnum (gdbarch
, start
, end
- start
);
2276 /* User registers lie completely outside of the range of
2277 normal registers. Catch them early so that the target
2279 if (regnum
>= gdbarch_num_cooked_regs (gdbarch
))
2281 struct value
*regval
= value_of_user_reg (regnum
, frame
);
2282 const char *regname
= user_reg_map_regnum_to_name (gdbarch
,
2285 /* Print in the same fashion
2286 gdbarch_print_registers_info's default
2287 implementation prints. */
2288 default_print_one_register_info (gdb_stdout
,
2293 gdbarch_print_registers_info (gdbarch
, gdb_stdout
,
2294 frame
, regnum
, fpregs
);
2299 /* A register group? */
2301 struct reggroup
*group
;
2303 for (group
= reggroup_next (gdbarch
, NULL
);
2305 group
= reggroup_next (gdbarch
, group
))
2307 /* Don't bother with a length check. Should the user
2308 enter a short register group name, go with the first
2309 group that matches. */
2310 if (strncmp (start
, reggroup_name (group
), end
- start
) == 0)
2318 regnum
< gdbarch_num_cooked_regs (gdbarch
);
2321 if (gdbarch_register_reggroup_p (gdbarch
, regnum
, group
))
2322 gdbarch_print_registers_info (gdbarch
,
2330 /* Nothing matched. */
2331 error (_("Invalid register `%.*s'"), (int) (end
- start
), start
);
2336 info_all_registers_command (const char *addr_exp
, int from_tty
)
2338 registers_info (addr_exp
, 1);
2342 info_registers_command (const char *addr_exp
, int from_tty
)
2344 registers_info (addr_exp
, 0);
2348 print_vector_info (struct ui_file
*file
,
2349 struct frame_info
*frame
, const char *args
)
2351 struct gdbarch
*gdbarch
= get_frame_arch (frame
);
2353 if (gdbarch_print_vector_info_p (gdbarch
))
2354 gdbarch_print_vector_info (gdbarch
, file
, frame
, args
);
2358 int printed_something
= 0;
2360 for (regnum
= 0; regnum
< gdbarch_num_cooked_regs (gdbarch
); regnum
++)
2362 if (gdbarch_register_reggroup_p (gdbarch
, regnum
, vector_reggroup
))
2364 printed_something
= 1;
2365 gdbarch_print_registers_info (gdbarch
, file
, frame
, regnum
, 1);
2368 if (!printed_something
)
2369 fprintf_filtered (file
, "No vector information\n");
2374 info_vector_command (const char *args
, int from_tty
)
2376 if (!target_has_registers ())
2377 error (_("The program has no registers now."));
2379 print_vector_info (gdb_stdout
, get_selected_frame (NULL
), args
);
2382 /* Kill the inferior process. Make us have no inferior. */
2385 kill_command (const char *arg
, int from_tty
)
2387 /* FIXME: This should not really be inferior_ptid (or target_has_execution).
2388 It should be a distinct flag that indicates that a target is active, cuz
2389 some targets don't have processes! */
2391 if (inferior_ptid
== null_ptid
)
2392 error (_("The program is not being run."));
2393 if (!query (_("Kill the program being debugged? ")))
2394 error (_("Not confirmed."));
2396 int pid
= current_inferior ()->pid
;
2397 /* Save the pid as a string before killing the inferior, since that
2398 may unpush the current target, and we need the string after. */
2399 std::string pid_str
= target_pid_to_str (ptid_t (pid
));
2400 int infnum
= current_inferior ()->num
;
2404 if (print_inferior_events
)
2405 printf_unfiltered (_("[Inferior %d (%s) killed]\n"),
2406 infnum
, pid_str
.c_str ());
2408 bfd_cache_close_all ();
2411 /* Used in `attach&' command. Proceed threads of inferior INF iff
2412 they stopped due to debugger request, and when they did, they
2413 reported a clean stop (GDB_SIGNAL_0). Do not proceed threads that
2414 have been explicitly been told to stop. */
2417 proceed_after_attach (inferior
*inf
)
2419 /* Don't error out if the current thread is running, because
2420 there may be other stopped threads. */
2422 /* Backup current thread and selected frame. */
2423 scoped_restore_current_thread restore_thread
;
2425 for (thread_info
*thread
: inf
->non_exited_threads ())
2426 if (!thread
->executing
2427 && !thread
->stop_requested
2428 && thread
->suspend
.stop_signal
== GDB_SIGNAL_0
)
2430 switch_to_thread (thread
);
2431 clear_proceed_status (0);
2432 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
2436 /* See inferior.h. */
2439 setup_inferior (int from_tty
)
2441 struct inferior
*inferior
;
2443 inferior
= current_inferior ();
2444 inferior
->needs_setup
= 0;
2446 /* If no exec file is yet known, try to determine it from the
2448 if (get_exec_file (0) == NULL
)
2449 exec_file_locate_attach (inferior_ptid
.pid (), 1, from_tty
);
2452 reopen_exec_file ();
2456 /* Take any necessary post-attaching actions for this platform. */
2457 target_post_attach (inferior_ptid
.pid ());
2459 post_create_inferior (from_tty
);
2462 /* What to do after the first program stops after attaching. */
2463 enum attach_post_wait_mode
2465 /* Do nothing. Leaves threads as they are. */
2466 ATTACH_POST_WAIT_NOTHING
,
2468 /* Re-resume threads that are marked running. */
2469 ATTACH_POST_WAIT_RESUME
,
2471 /* Stop all threads. */
2472 ATTACH_POST_WAIT_STOP
,
2475 /* Called after we've attached to a process and we've seen it stop for
2476 the first time. Resume, stop, or don't touch the threads according
2480 attach_post_wait (int from_tty
, enum attach_post_wait_mode mode
)
2482 struct inferior
*inferior
;
2484 inferior
= current_inferior ();
2485 inferior
->control
.stop_soon
= NO_STOP_QUIETLY
;
2487 if (inferior
->needs_setup
)
2488 setup_inferior (from_tty
);
2490 if (mode
== ATTACH_POST_WAIT_RESUME
)
2492 /* The user requested an `attach&', so be sure to leave threads
2493 that didn't get a signal running. */
2495 /* Immediately resume all suspended threads of this inferior,
2496 and this inferior only. This should have no effect on
2497 already running threads. If a thread has been stopped with a
2498 signal, leave it be. */
2500 proceed_after_attach (inferior
);
2503 if (inferior_thread ()->suspend
.stop_signal
== GDB_SIGNAL_0
)
2505 clear_proceed_status (0);
2506 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
2510 else if (mode
== ATTACH_POST_WAIT_STOP
)
2512 /* The user requested a plain `attach', so be sure to leave
2513 the inferior stopped. */
2515 /* At least the current thread is already stopped. */
2517 /* In all-stop, by definition, all threads have to be already
2518 stopped at this point. In non-stop, however, although the
2519 selected thread is stopped, others may still be executing.
2520 Be sure to explicitly stop all threads of the process. This
2521 should have no effect on already stopped threads. */
2523 target_stop (ptid_t (inferior
->pid
));
2524 else if (target_is_non_stop_p ())
2526 struct thread_info
*lowest
= inferior_thread ();
2528 stop_all_threads ();
2530 /* It's not defined which thread will report the attach
2531 stop. For consistency, always select the thread with
2532 lowest GDB number, which should be the main thread, if it
2534 for (thread_info
*thread
: current_inferior ()->non_exited_threads ())
2535 if (thread
->inf
->num
< lowest
->inf
->num
2536 || thread
->per_inf_num
< lowest
->per_inf_num
)
2539 switch_to_thread (lowest
);
2542 /* Tell the user/frontend where we're stopped. */
2544 if (deprecated_attach_hook
)
2545 deprecated_attach_hook ();
2549 /* "attach" command entry point. Takes a program started up outside
2550 of gdb and ``attaches'' to it. This stops it cold in its tracks
2551 and allows us to start debugging it. */
2554 attach_command (const char *args
, int from_tty
)
2557 struct target_ops
*attach_target
;
2558 struct inferior
*inferior
= current_inferior ();
2559 enum attach_post_wait_mode mode
;
2561 dont_repeat (); /* Not for the faint of heart */
2563 scoped_disable_commit_resumed
disable_commit_resumed ("attaching");
2565 if (gdbarch_has_global_solist (target_gdbarch ()))
2566 /* Don't complain if all processes share the same symbol
2569 else if (target_has_execution ())
2571 if (query (_("A program is being debugged already. Kill it? ")))
2574 error (_("Not killed."));
2577 /* Clean up any leftovers from other runs. Some other things from
2578 this function should probably be moved into target_pre_inferior. */
2579 target_pre_inferior (from_tty
);
2581 gdb::unique_xmalloc_ptr
<char> stripped
= strip_bg_char (args
, &async_exec
);
2582 args
= stripped
.get ();
2584 attach_target
= find_attach_target ();
2586 prepare_execution_command (attach_target
, async_exec
);
2588 if (non_stop
&& !attach_target
->supports_non_stop ())
2589 error (_("Cannot attach to this target in non-stop mode"));
2591 attach_target
->attach (args
, from_tty
);
2592 /* to_attach should push the target, so after this point we
2593 shouldn't refer to attach_target again. */
2594 attach_target
= NULL
;
2596 /* Set up the "saved terminal modes" of the inferior
2597 based on what modes we are starting it with. */
2598 target_terminal::init ();
2600 /* Install inferior's terminal modes. This may look like a no-op,
2601 as we've just saved them above, however, this does more than
2602 restore terminal settings:
2604 - installs a SIGINT handler that forwards SIGINT to the inferior.
2605 Otherwise a Ctrl-C pressed just while waiting for the initial
2606 stop would end up as a spurious Quit.
2608 - removes stdin from the event loop, which we need if attaching
2609 in the foreground, otherwise on targets that report an initial
2610 stop on attach (which are most) we'd process input/commands
2611 while we're in the event loop waiting for that stop. That is,
2612 before the attach continuation runs and the command is really
2614 target_terminal::inferior ();
2616 /* Set up execution context to know that we should return from
2617 wait_for_inferior as soon as the target reports a stop. */
2618 init_wait_for_inferior ();
2620 inferior
->needs_setup
= 1;
2622 if (target_is_non_stop_p ())
2624 /* If we find that the current thread isn't stopped, explicitly
2625 do so now, because we're going to install breakpoints and
2629 /* The user requested an `attach&'; stop just one thread. */
2630 target_stop (inferior_ptid
);
2632 /* The user requested an `attach', so stop all threads of this
2634 target_stop (ptid_t (inferior_ptid
.pid ()));
2637 /* Check for exec file mismatch, and let the user solve it. */
2638 validate_exec_file (from_tty
);
2640 mode
= async_exec
? ATTACH_POST_WAIT_RESUME
: ATTACH_POST_WAIT_STOP
;
2642 /* Some system don't generate traps when attaching to inferior.
2643 E.g. Mach 3 or GNU hurd. */
2644 if (!target_attach_no_wait ())
2646 /* Careful here. See comments in inferior.h. Basically some
2647 OSes don't ignore SIGSTOPs on continue requests anymore. We
2648 need a way for handle_inferior_event to reset the stop_signal
2649 variable after an attach, and this is what
2650 STOP_QUIETLY_NO_SIGSTOP is for. */
2651 inferior
->control
.stop_soon
= STOP_QUIETLY_NO_SIGSTOP
;
2653 /* Wait for stop. */
2654 inferior
->add_continuation ([=] ()
2656 attach_post_wait (from_tty
, mode
);
2659 /* Let infrun consider waiting for events out of this
2661 inferior
->process_target ()->threads_executing
= true;
2663 if (!target_is_async_p ())
2664 mark_infrun_async_event_handler ();
2668 attach_post_wait (from_tty
, mode
);
2670 disable_commit_resumed
.reset_and_commit ();
2673 /* We had just found out that the target was already attached to an
2674 inferior. PTID points at a thread of this new inferior, that is
2675 the most likely to be stopped right now, but not necessarily so.
2676 The new inferior is assumed to be already added to the inferior
2677 list at this point. If LEAVE_RUNNING, then leave the threads of
2678 this inferior running, except those we've explicitly seen reported
2682 notice_new_inferior (thread_info
*thr
, bool leave_running
, int from_tty
)
2684 enum attach_post_wait_mode mode
2685 = leave_running
? ATTACH_POST_WAIT_RESUME
: ATTACH_POST_WAIT_NOTHING
;
2687 gdb::optional
<scoped_restore_current_thread
> restore_thread
;
2689 if (inferior_ptid
!= null_ptid
)
2690 restore_thread
.emplace ();
2692 /* Avoid reading registers -- we haven't fetched the target
2694 switch_to_thread_no_regs (thr
);
2696 /* When we "notice" a new inferior we need to do all the things we
2697 would normally do if we had just attached to it. */
2701 struct inferior
*inferior
= current_inferior ();
2703 /* We're going to install breakpoints, and poke at memory,
2704 ensure that the inferior is stopped for a moment while we do
2706 target_stop (inferior_ptid
);
2708 inferior
->control
.stop_soon
= STOP_QUIETLY_REMOTE
;
2710 /* Wait for stop before proceeding. */
2711 inferior
->add_continuation ([=] ()
2713 attach_post_wait (from_tty
, mode
);
2719 attach_post_wait (from_tty
, mode
);
2724 * takes a program previously attached to and detaches it.
2725 * The program resumes execution and will no longer stop
2726 * on signals, etc. We better not have left any breakpoints
2727 * in the program or it'll die when it hits one. For this
2728 * to work, it may be necessary for the process to have been
2729 * previously attached. It *might* work if the program was
2730 * started via the normal ptrace (PTRACE_TRACEME).
2734 detach_command (const char *args
, int from_tty
)
2736 dont_repeat (); /* Not for the faint of heart. */
2738 if (inferior_ptid
== null_ptid
)
2739 error (_("The program is not being run."));
2741 scoped_disable_commit_resumed
disable_commit_resumed ("detaching");
2743 query_if_trace_running (from_tty
);
2745 disconnect_tracing ();
2747 /* Hold a strong reference to the target while (maybe)
2748 detaching the parent. Otherwise detaching could close the
2751 = target_ops_ref::new_reference (current_inferior ()->process_target ());
2753 /* Save this before detaching, since detaching may unpush the
2754 process_stratum target. */
2755 bool was_non_stop_p
= target_is_non_stop_p ();
2757 target_detach (current_inferior (), from_tty
);
2759 /* The current inferior process was just detached successfully. Get
2760 rid of breakpoints that no longer make sense. Note we don't do
2761 this within target_detach because that is also used when
2762 following child forks, and in that case we will want to transfer
2763 breakpoints to the child, not delete them. */
2764 breakpoint_init_inferior (inf_exited
);
2766 /* If the solist is global across inferiors, don't clear it when we
2767 detach from a single inferior. */
2768 if (!gdbarch_has_global_solist (target_gdbarch ()))
2769 no_shared_libraries (NULL
, from_tty
);
2771 if (deprecated_detach_hook
)
2772 deprecated_detach_hook ();
2774 if (!was_non_stop_p
)
2775 restart_after_all_stop_detach (as_process_stratum_target (target_ref
.get ()));
2777 disable_commit_resumed
.reset_and_commit ();
2780 /* Disconnect from the current target without resuming it (leaving it
2781 waiting for a debugger).
2783 We'd better not have left any breakpoints in the program or the
2784 next debugger will get confused. Currently only supported for some
2785 remote targets, since the normal attach mechanisms don't work on
2786 stopped processes on some native platforms (e.g. GNU/Linux). */
2789 disconnect_command (const char *args
, int from_tty
)
2791 dont_repeat (); /* Not for the faint of heart. */
2792 query_if_trace_running (from_tty
);
2793 disconnect_tracing ();
2794 target_disconnect (args
, from_tty
);
2795 no_shared_libraries (NULL
, from_tty
);
2796 init_thread_list ();
2797 if (deprecated_detach_hook
)
2798 deprecated_detach_hook ();
2801 /* Stop PTID in the current target, and tag the PTID threads as having
2802 been explicitly requested to stop. PTID can be a thread, a
2803 process, or minus_one_ptid, meaning all threads of all inferiors of
2804 the current target. */
2807 stop_current_target_threads_ns (ptid_t ptid
)
2811 /* Tag the thread as having been explicitly requested to stop, so
2812 other parts of gdb know not to resume this thread automatically,
2813 if it was stopped due to an internal event. Limit this to
2814 non-stop mode, as when debugging a multi-threaded application in
2815 all-stop mode, we will only get one stop event --- it's undefined
2816 which thread will report the event. */
2817 set_stop_requested (current_inferior ()->process_target (),
2821 /* See inferior.h. */
2824 interrupt_target_1 (bool all_threads
)
2826 scoped_disable_commit_resumed
disable_commit_resumed ("interrupting");
2832 scoped_restore_current_thread restore_thread
;
2834 for (inferior
*inf
: all_inferiors ())
2836 switch_to_inferior_no_thread (inf
);
2837 stop_current_target_threads_ns (minus_one_ptid
);
2841 stop_current_target_threads_ns (inferior_ptid
);
2844 target_interrupt ();
2846 disable_commit_resumed
.reset_and_commit ();
2850 Stop the execution of the target while running in async mode, in
2851 the background. In all-stop, stop the whole process. In non-stop
2852 mode, stop the current thread only by default, or stop all threads
2853 if the `-a' switch is used. */
2856 interrupt_command (const char *args
, int from_tty
)
2858 if (target_can_async_p ())
2860 int all_threads
= 0;
2862 dont_repeat (); /* Not for the faint of heart. */
2865 && startswith (args
, "-a"))
2868 if (!non_stop
&& all_threads
)
2869 error (_("-a is meaningless in all-stop mode."));
2871 interrupt_target_1 (all_threads
);
2875 /* See inferior.h. */
2878 default_print_float_info (struct gdbarch
*gdbarch
, struct ui_file
*file
,
2879 struct frame_info
*frame
, const char *args
)
2882 int printed_something
= 0;
2884 for (regnum
= 0; regnum
< gdbarch_num_cooked_regs (gdbarch
); regnum
++)
2886 if (gdbarch_register_reggroup_p (gdbarch
, regnum
, float_reggroup
))
2888 printed_something
= 1;
2889 gdbarch_print_registers_info (gdbarch
, file
, frame
, regnum
, 1);
2892 if (!printed_something
)
2893 fprintf_filtered (file
, "No floating-point info "
2894 "available for this processor.\n");
2898 info_float_command (const char *args
, int from_tty
)
2900 struct frame_info
*frame
;
2902 if (!target_has_registers ())
2903 error (_("The program has no registers now."));
2905 frame
= get_selected_frame (NULL
);
2906 gdbarch_print_float_info (get_frame_arch (frame
), gdb_stdout
, frame
, args
);
2909 /* Implement `info proc' family of commands. */
2912 info_proc_cmd_1 (const char *args
, enum info_proc_what what
, int from_tty
)
2914 struct gdbarch
*gdbarch
= get_current_arch ();
2916 if (!target_info_proc (args
, what
))
2918 if (gdbarch_info_proc_p (gdbarch
))
2919 gdbarch_info_proc (gdbarch
, args
, what
);
2921 error (_("Not supported on this target."));
2925 /* Implement `info proc' when given without any further parameters. */
2928 info_proc_cmd (const char *args
, int from_tty
)
2930 info_proc_cmd_1 (args
, IP_MINIMAL
, from_tty
);
2933 /* Implement `info proc mappings'. */
2936 info_proc_cmd_mappings (const char *args
, int from_tty
)
2938 info_proc_cmd_1 (args
, IP_MAPPINGS
, from_tty
);
2941 /* Implement `info proc stat'. */
2944 info_proc_cmd_stat (const char *args
, int from_tty
)
2946 info_proc_cmd_1 (args
, IP_STAT
, from_tty
);
2949 /* Implement `info proc status'. */
2952 info_proc_cmd_status (const char *args
, int from_tty
)
2954 info_proc_cmd_1 (args
, IP_STATUS
, from_tty
);
2957 /* Implement `info proc cwd'. */
2960 info_proc_cmd_cwd (const char *args
, int from_tty
)
2962 info_proc_cmd_1 (args
, IP_CWD
, from_tty
);
2965 /* Implement `info proc cmdline'. */
2968 info_proc_cmd_cmdline (const char *args
, int from_tty
)
2970 info_proc_cmd_1 (args
, IP_CMDLINE
, from_tty
);
2973 /* Implement `info proc exe'. */
2976 info_proc_cmd_exe (const char *args
, int from_tty
)
2978 info_proc_cmd_1 (args
, IP_EXE
, from_tty
);
2981 /* Implement `info proc files'. */
2984 info_proc_cmd_files (const char *args
, int from_tty
)
2986 info_proc_cmd_1 (args
, IP_FILES
, from_tty
);
2989 /* Implement `info proc all'. */
2992 info_proc_cmd_all (const char *args
, int from_tty
)
2994 info_proc_cmd_1 (args
, IP_ALL
, from_tty
);
2997 /* Implement `show print finish'. */
3000 show_print_finish (struct ui_file
*file
, int from_tty
,
3001 struct cmd_list_element
*c
,
3004 fprintf_filtered (file
, _("\
3005 Printing of return value after `finish' is %s.\n"),
3010 /* This help string is used for the run, start, and starti commands.
3011 It is defined as a macro to prevent duplication. */
3013 #define RUN_ARGS_HELP \
3014 "You may specify arguments to give it.\n\
3015 Args may include \"*\", or \"[...]\"; they are expanded using the\n\
3016 shell that will start the program (specified by the \"$SHELL\" environment\n\
3017 variable). Input and output redirection with \">\", \"<\", or \">>\"\n\
3018 are also allowed.\n\
3020 With no arguments, uses arguments last specified (with \"run\" or \n\
3021 \"set args\"). To cancel previous arguments and run with no arguments,\n\
3022 use \"set args\" without arguments.\n\
3024 To start the inferior without using a shell, use \"set startup-with-shell off\"."
3026 void _initialize_infcmd ();
3028 _initialize_infcmd ()
3030 static struct cmd_list_element
*info_proc_cmdlist
;
3031 struct cmd_list_element
*c
= NULL
;
3032 const char *cmd_name
;
3034 /* Add the filename of the terminal connected to inferior I/O. */
3035 add_setshow_optional_filename_cmd ("inferior-tty", class_run
,
3036 &inferior_io_terminal_scratch
, _("\
3037 Set terminal for future runs of program being debugged."), _("\
3038 Show terminal for future runs of program being debugged."), _("\
3039 Usage: set inferior-tty [TTY]\n\n\
3040 If TTY is omitted, the default behavior of using the same terminal as GDB\n\
3042 set_inferior_tty_command
,
3043 show_inferior_tty_command
,
3044 &setlist
, &showlist
);
3045 cmd_name
= "inferior-tty";
3046 c
= lookup_cmd (&cmd_name
, setlist
, "", NULL
, -1, 1);
3047 gdb_assert (c
!= NULL
);
3048 add_alias_cmd ("tty", c
, class_run
, 0, &cmdlist
);
3051 add_setshow_string_noescape_cmd (cmd_name
, class_run
,
3052 &inferior_args_scratch
, _("\
3053 Set argument list to give program being debugged when it is started."), _("\
3054 Show argument list to give program being debugged when it is started."), _("\
3055 Follow this command with any number of args, to be passed to the program."),
3058 &setlist
, &showlist
);
3059 c
= lookup_cmd (&cmd_name
, setlist
, "", NULL
, -1, 1);
3060 gdb_assert (c
!= NULL
);
3061 set_cmd_completer (c
, filename_completer
);
3064 add_setshow_string_noescape_cmd (cmd_name
, class_run
,
3065 &inferior_cwd_scratch
, _("\
3066 Set the current working directory to be used when the inferior is started.\n\
3067 Changing this setting does not have any effect on inferiors that are\n\
3070 Show the current working directory that is used when the inferior is started."),
3072 Use this command to change the current working directory that will be used\n\
3073 when the inferior is started. This setting does not affect GDB's current\n\
3074 working directory."),
3077 &setlist
, &showlist
);
3078 c
= lookup_cmd (&cmd_name
, setlist
, "", NULL
, -1, 1);
3079 gdb_assert (c
!= NULL
);
3080 set_cmd_completer (c
, filename_completer
);
3082 c
= add_cmd ("environment", no_class
, environment_info
, _("\
3083 The environment to give the program, or one variable's value.\n\
3084 With an argument VAR, prints the value of environment variable VAR to\n\
3085 give the program being debugged. With no arguments, prints the entire\n\
3086 environment to be given to the program."), &showlist
);
3087 set_cmd_completer (c
, noop_completer
);
3089 add_basic_prefix_cmd ("unset", no_class
,
3090 _("Complement to certain \"set\" commands."),
3091 &unsetlist
, 0, &cmdlist
);
3093 c
= add_cmd ("environment", class_run
, unset_environment_command
, _("\
3094 Cancel environment variable VAR for the program.\n\
3095 This does not affect the program until the next \"run\" command."),
3097 set_cmd_completer (c
, noop_completer
);
3099 c
= add_cmd ("environment", class_run
, set_environment_command
, _("\
3100 Set environment variable value to give the program.\n\
3101 Arguments are VAR VALUE where VAR is variable name and VALUE is value.\n\
3102 VALUES of environment variables are uninterpreted strings.\n\
3103 This does not affect the program until the next \"run\" command."),
3105 set_cmd_completer (c
, noop_completer
);
3107 c
= add_com ("path", class_files
, path_command
, _("\
3108 Add directory DIR(s) to beginning of search path for object files.\n\
3109 $cwd in the path means the current working directory.\n\
3110 This path is equivalent to the $PATH shell variable. It is a list of\n\
3111 directories, separated by colons. These directories are searched to find\n\
3112 fully linked executable files and separately compiled object files as \
3114 set_cmd_completer (c
, filename_completer
);
3116 c
= add_cmd ("paths", no_class
, path_info
, _("\
3117 Current search path for finding object files.\n\
3118 $cwd in the path means the current working directory.\n\
3119 This path is equivalent to the $PATH shell variable. It is a list of\n\
3120 directories, separated by colons. These directories are searched to find\n\
3121 fully linked executable files and separately compiled object files as \
3124 set_cmd_completer (c
, noop_completer
);
3126 add_prefix_cmd ("kill", class_run
, kill_command
,
3127 _("Kill execution of program being debugged."),
3128 &killlist
, 0, &cmdlist
);
3130 add_com ("attach", class_run
, attach_command
, _("\
3131 Attach to a process or file outside of GDB.\n\
3132 This command attaches to another target, of the same type as your last\n\
3133 \"target\" command (\"info files\" will show your target stack).\n\
3134 The command may take as argument a process id or a device file.\n\
3135 For a process id, you must have permission to send the process a signal,\n\
3136 and it must have the same effective uid as the debugger.\n\
3137 When using \"attach\" with a process id, the debugger finds the\n\
3138 program running in the process, looking first in the current working\n\
3139 directory, or (if not found there) using the source file search path\n\
3140 (see the \"directory\" command). You can also use the \"file\" command\n\
3141 to specify the program, and to load its symbol table."));
3143 add_prefix_cmd ("detach", class_run
, detach_command
, _("\
3144 Detach a process or file previously attached.\n\
3145 If a process, it is no longer traced, and it continues its execution. If\n\
3146 you were debugging a file, the file is closed and gdb no longer accesses it."),
3147 &detachlist
, 0, &cmdlist
);
3149 add_com ("disconnect", class_run
, disconnect_command
, _("\
3150 Disconnect from a target.\n\
3151 The target will wait for another debugger to connect. Not available for\n\
3154 c
= add_com ("signal", class_run
, signal_command
, _("\
3155 Continue program with the specified signal.\n\
3156 Usage: signal SIGNAL\n\
3157 The SIGNAL argument is processed the same as the handle command.\n\
3159 An argument of \"0\" means continue the program without sending it a signal.\n\
3160 This is useful in cases where the program stopped because of a signal,\n\
3161 and you want to resume the program while discarding the signal.\n\
3163 In a multi-threaded program the signal is delivered to, or discarded from,\n\
3164 the current thread only."));
3165 set_cmd_completer (c
, signal_completer
);
3167 c
= add_com ("queue-signal", class_run
, queue_signal_command
, _("\
3168 Queue a signal to be delivered to the current thread when it is resumed.\n\
3169 Usage: queue-signal SIGNAL\n\
3170 The SIGNAL argument is processed the same as the handle command.\n\
3171 It is an error if the handling state of SIGNAL is \"nopass\".\n\
3173 An argument of \"0\" means remove any currently queued signal from\n\
3174 the current thread. This is useful in cases where the program stopped\n\
3175 because of a signal, and you want to resume it while discarding the signal.\n\
3177 In a multi-threaded program the signal is queued with, or discarded from,\n\
3178 the current thread only."));
3179 set_cmd_completer (c
, signal_completer
);
3181 cmd_list_element
*stepi_cmd
3182 = add_com ("stepi", class_run
, stepi_command
, _("\
3183 Step one instruction exactly.\n\
3185 Argument N means step N times (or till program stops for another \
3187 add_com_alias ("si", stepi_cmd
, class_run
, 0);
3189 cmd_list_element
*nexti_cmd
3190 = add_com ("nexti", class_run
, nexti_command
, _("\
3191 Step one instruction, but proceed through subroutine calls.\n\
3193 Argument N means step N times (or till program stops for another \
3195 add_com_alias ("ni", nexti_cmd
, class_run
, 0);
3197 cmd_list_element
*finish_cmd
3198 = add_com ("finish", class_run
, finish_command
, _("\
3199 Execute until selected stack frame returns.\n\
3201 Upon return, the value returned is printed and put in the value history."));
3202 add_com_alias ("fin", finish_cmd
, class_run
, 1);
3204 cmd_list_element
*next_cmd
3205 = add_com ("next", class_run
, next_command
, _("\
3206 Step program, proceeding through subroutine calls.\n\
3208 Unlike \"step\", if the current source line calls a subroutine,\n\
3209 this command does not enter the subroutine, but instead steps over\n\
3210 the call, in effect treating it as a single source line."));
3211 add_com_alias ("n", next_cmd
, class_run
, 1);
3213 cmd_list_element
*step_cmd
3214 = add_com ("step", class_run
, step_command
, _("\
3215 Step program until it reaches a different source line.\n\
3217 Argument N means step N times (or till program stops for another \
3219 add_com_alias ("s", step_cmd
, class_run
, 1);
3221 cmd_list_element
*until_cmd
3222 = add_com ("until", class_run
, until_command
, _("\
3223 Execute until past the current line or past a LOCATION.\n\
3224 Execute until the program reaches a source line greater than the current\n\
3225 or a specified location (same args as break command) within the current \
3227 set_cmd_completer (until_cmd
, location_completer
);
3228 add_com_alias ("u", until_cmd
, class_run
, 1);
3230 c
= add_com ("advance", class_run
, advance_command
, _("\
3231 Continue the program up to the given location (same form as args for break \
3233 Execution will also stop upon exit from the current stack frame."));
3234 set_cmd_completer (c
, location_completer
);
3236 cmd_list_element
*jump_cmd
3237 = add_com ("jump", class_run
, jump_command
, _("\
3238 Continue program being debugged at specified line or address.\n\
3239 Usage: jump LOCATION\n\
3240 Give as argument either LINENUM or *ADDR, where ADDR is an expression\n\
3241 for an address to start at."));
3242 set_cmd_completer (jump_cmd
, location_completer
);
3243 add_com_alias ("j", jump_cmd
, class_run
, 1);
3245 cmd_list_element
*continue_cmd
3246 = add_com ("continue", class_run
, continue_command
, _("\
3247 Continue program being debugged, after signal or breakpoint.\n\
3248 Usage: continue [N]\n\
3249 If proceeding from breakpoint, a number N may be used as an argument,\n\
3250 which means to set the ignore count of that breakpoint to N - 1 (so that\n\
3251 the breakpoint won't break until the Nth time it is reached).\n\
3253 If non-stop mode is enabled, continue only the current thread,\n\
3254 otherwise all the threads in the program are continued. To \n\
3255 continue all stopped threads in non-stop mode, use the -a option.\n\
3256 Specifying -a and an ignore count simultaneously is an error."));
3257 add_com_alias ("c", continue_cmd
, class_run
, 1);
3258 add_com_alias ("fg", continue_cmd
, class_run
, 1);
3260 cmd_list_element
*run_cmd
3261 = add_com ("run", class_run
, run_command
, _("\
3262 Start debugged program.\n"
3264 set_cmd_completer (run_cmd
, filename_completer
);
3265 add_com_alias ("r", run_cmd
, class_run
, 1);
3267 c
= add_com ("start", class_run
, start_command
, _("\
3268 Start the debugged program stopping at the beginning of the main procedure.\n"
3270 set_cmd_completer (c
, filename_completer
);
3272 c
= add_com ("starti", class_run
, starti_command
, _("\
3273 Start the debugged program stopping at the first instruction.\n"
3275 set_cmd_completer (c
, filename_completer
);
3277 add_com ("interrupt", class_run
, interrupt_command
,
3278 _("Interrupt the execution of the debugged program.\n\
3279 If non-stop mode is enabled, interrupt only the current thread,\n\
3280 otherwise all the threads in the program are stopped. To \n\
3281 interrupt all running threads in non-stop mode, use the -a option."));
3283 cmd_list_element
*info_registers_cmd
3284 = add_info ("registers", info_registers_command
, _("\
3285 List of integer registers and their contents, for selected stack frame.\n\
3286 One or more register names as argument means describe the given registers.\n\
3287 One or more register group names as argument means describe the registers\n\
3288 in the named register groups."));
3289 add_info_alias ("r", info_registers_cmd
, 1);
3290 set_cmd_completer (info_registers_cmd
, reg_or_group_completer
);
3292 c
= add_info ("all-registers", info_all_registers_command
, _("\
3293 List of all registers and their contents, for selected stack frame.\n\
3294 One or more register names as argument means describe the given registers.\n\
3295 One or more register group names as argument means describe the registers\n\
3296 in the named register groups."));
3297 set_cmd_completer (c
, reg_or_group_completer
);
3299 add_info ("program", info_program_command
,
3300 _("Execution status of the program."));
3302 add_info ("float", info_float_command
,
3303 _("Print the status of the floating point unit."));
3305 add_info ("vector", info_vector_command
,
3306 _("Print the status of the vector unit."));
3308 add_prefix_cmd ("proc", class_info
, info_proc_cmd
,
3310 Show additional information about a process.\n\
3311 Specify any process id, or use the program being debugged by default."),
3313 1/*allow-unknown*/, &infolist
);
3315 add_cmd ("mappings", class_info
, info_proc_cmd_mappings
, _("\
3316 List memory regions mapped by the specified process."),
3317 &info_proc_cmdlist
);
3319 add_cmd ("stat", class_info
, info_proc_cmd_stat
, _("\
3320 List process info from /proc/PID/stat."),
3321 &info_proc_cmdlist
);
3323 add_cmd ("status", class_info
, info_proc_cmd_status
, _("\
3324 List process info from /proc/PID/status."),
3325 &info_proc_cmdlist
);
3327 add_cmd ("cwd", class_info
, info_proc_cmd_cwd
, _("\
3328 List current working directory of the specified process."),
3329 &info_proc_cmdlist
);
3331 add_cmd ("cmdline", class_info
, info_proc_cmd_cmdline
, _("\
3332 List command line arguments of the specified process."),
3333 &info_proc_cmdlist
);
3335 add_cmd ("exe", class_info
, info_proc_cmd_exe
, _("\
3336 List absolute filename for executable of the specified process."),
3337 &info_proc_cmdlist
);
3339 add_cmd ("files", class_info
, info_proc_cmd_files
, _("\
3340 List files opened by the specified process."),
3341 &info_proc_cmdlist
);
3343 add_cmd ("all", class_info
, info_proc_cmd_all
, _("\
3344 List all available info about the specified process."),
3345 &info_proc_cmdlist
);
3347 add_setshow_boolean_cmd ("finish", class_support
,
3348 &user_print_options
.finish_print
, _("\
3349 Set whether `finish' prints the return value."), _("\
3350 Show whether `finish' prints the return value."), NULL
,
3353 &setprintlist
, &showprintlist
);