1 /* Memory-access and commands for "inferior" process, for GDB.
3 Copyright (C) 1986-2023 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"
58 #include "dwarf2/loc.h"
60 /* Local functions: */
62 static void until_next_command (int);
64 static void step_1 (int, int, const char *);
66 #define ERROR_NO_INFERIOR \
67 if (!target_has_execution ()) error (_("The program is not being run."));
69 /* Scratch area where string containing arguments to give to the
70 program will be stored by 'set args'. As soon as anything is
71 stored, notice_args_set will move it into per-inferior storage.
72 Arguments are separated by spaces. Empty string (pointer to '\0')
75 static std::string inferior_args_scratch
;
77 /* Scratch area where the new cwd will be stored by 'set cwd'. */
79 static std::string inferior_cwd_scratch
;
81 /* Scratch area where 'set inferior-tty' will store user-provided value.
82 We'll immediate copy it into per-inferior storage. */
84 static std::string inferior_io_terminal_scratch
;
86 /* Pid of our debugged inferior, or 0 if no inferior now.
87 Since various parts of infrun.c test this to see whether there is a program
88 being debugged it should be nonzero (currently 3 is used) for remote
93 /* Nonzero if stopped due to completion of a stack dummy routine. */
95 enum stop_stack_kind stop_stack_dummy
;
97 /* Nonzero if stopped due to a random (unexpected) signal in inferior
100 int stopped_by_random_signal
;
103 /* Whether "finish" should print the value. */
105 static bool finish_print
= true;
110 set_inferior_tty_command (const char *args
, int from_tty
,
111 struct cmd_list_element
*c
)
113 /* CLI has assigned the user-provided value to inferior_io_terminal_scratch.
114 Now route it to current inferior. */
115 current_inferior ()->set_tty (inferior_io_terminal_scratch
);
119 show_inferior_tty_command (struct ui_file
*file
, int from_tty
,
120 struct cmd_list_element
*c
, const char *value
)
122 /* Note that we ignore the passed-in value in favor of computing it
124 const std::string
&inferior_tty
= current_inferior ()->tty ();
127 _("Terminal for future runs of program being debugged "
128 "is \"%s\".\n"), inferior_tty
.c_str ());
132 set_inferior_args_vector (int argc
, char **argv
)
134 gdb::array_view
<char * const> args (argv
, argc
);
135 std::string n
= construct_inferior_arguments (args
);
136 current_inferior ()->set_args (std::move (n
));
139 /* Notice when `set args' is run. */
142 set_args_command (const char *args
, int from_tty
, struct cmd_list_element
*c
)
144 /* CLI has assigned the user-provided value to inferior_args_scratch.
145 Now route it to current inferior. */
146 current_inferior ()->set_args (inferior_args_scratch
);
149 /* Notice when `show args' is run. */
152 show_args_command (struct ui_file
*file
, int from_tty
,
153 struct cmd_list_element
*c
, const char *value
)
155 /* Note that we ignore the passed-in value in favor of computing it
157 deprecated_show_value_hack (file
, from_tty
, c
,
158 current_inferior ()->args ().c_str ());
161 /* See gdbsupport/common-inferior.h. */
166 return current_inferior ()->cwd ();
169 /* Handle the 'set cwd' command. */
172 set_cwd_command (const char *args
, int from_tty
, struct cmd_list_element
*c
)
174 current_inferior ()->set_cwd (inferior_cwd_scratch
);
177 /* Handle the 'show cwd' command. */
180 show_cwd_command (struct ui_file
*file
, int from_tty
,
181 struct cmd_list_element
*c
, const char *value
)
183 const std::string
&cwd
= current_inferior ()->cwd ();
188 You have not set the inferior's current working directory.\n\
189 The inferior will inherit GDB's cwd if native debugging, or the remote\n\
190 server's cwd if remote debugging.\n"));
193 _("Current working directory that will be used "
194 "when starting the inferior is \"%s\".\n"),
199 /* This function strips the '&' character (indicating background
200 execution) that is added as *the last* of the arguments ARGS of a
201 command. A copy of the incoming ARGS without the '&' is returned,
202 unless the resulting string after stripping is empty, in which case
203 NULL is returned. *BG_CHAR_P is an output boolean that indicates
204 whether the '&' character was found. */
206 static gdb::unique_xmalloc_ptr
<char>
207 strip_bg_char (const char *args
, int *bg_char_p
)
211 if (args
== nullptr || *args
== '\0')
217 p
= args
+ strlen (args
);
221 while (p
> args
&& isspace (p
[-1]))
226 return gdb::unique_xmalloc_ptr
<char>
227 (savestring (args
, p
- args
));
229 return gdb::unique_xmalloc_ptr
<char> (nullptr);
233 return make_unique_xstrdup (args
);
236 /* Common actions to take after creating any sort of inferior, by any
237 means (running, attaching, connecting, et cetera). The target
238 should be stopped. */
241 post_create_inferior (int from_tty
)
244 /* Be sure we own the terminal in case write operations are performed. */
245 target_terminal::ours_for_output ();
247 infrun_debug_show_threads ("threads in the newly created inferior",
248 current_inferior ()->non_exited_threads ());
250 /* If the target hasn't taken care of this already, do it now.
251 Targets which need to access registers during to_open,
252 to_create_inferior, or to_attach should do it earlier; but many
254 target_find_description ();
256 /* Now that we know the register layout, retrieve current PC. But
257 if the PC is unavailable (e.g., we're opening a core file with
258 missing registers info), ignore it. */
259 thread_info
*thr
= inferior_thread ();
261 thr
->clear_stop_pc ();
264 regcache
*rc
= get_thread_regcache (thr
);
265 thr
->set_stop_pc (regcache_read_pc (rc
));
267 catch (const gdb_exception_error
&ex
)
269 if (ex
.error
!= NOT_AVAILABLE_ERROR
)
273 if (current_program_space
->exec_bfd ())
275 const unsigned solib_add_generation
276 = current_program_space
->solib_add_generation
;
278 scoped_restore restore_in_initial_library_scan
279 = make_scoped_restore (¤t_inferior ()->in_initial_library_scan
,
282 /* Create the hooks to handle shared library load and unload
284 solib_create_inferior_hook (from_tty
);
286 if (current_program_space
->solib_add_generation
== solib_add_generation
)
288 /* The platform-specific hook should load initial shared libraries,
289 but didn't. FROM_TTY will be incorrectly 0 but such solib
290 targets should be fixed anyway. Call it only after the solib
291 target has been initialized by solib_create_inferior_hook. */
294 warning (_("platform-specific solib_create_inferior_hook did "
295 "not load initial shared libraries."));
297 /* If the solist is global across processes, there's no need to
299 if (!gdbarch_has_global_solist (target_gdbarch ()))
300 solib_add (nullptr, 0, auto_solib_add
);
304 /* If the user sets watchpoints before execution having started,
305 then she gets software watchpoints, because GDB can't know which
306 target will end up being pushed, or if it supports hardware
307 watchpoints or not. breakpoint_re_set takes care of promoting
308 watchpoints to hardware watchpoints if possible, however, if this
309 new inferior doesn't load shared libraries or we don't pull in
310 symbols from any other source on this target/arch,
311 breakpoint_re_set is never called. Call it now so that software
312 watchpoints get a chance to be promoted to hardware watchpoints
313 if the now pushed target supports hardware watchpoints. */
314 breakpoint_re_set ();
316 gdb::observers::inferior_created
.notify (current_inferior ());
319 /* Kill the inferior if already running. This function is designed
320 to be called when we are about to start the execution of the program
321 from the beginning. Ask the user to confirm that he wants to restart
322 the program being debugged when FROM_TTY is non-null. */
325 kill_if_already_running (int from_tty
)
327 if (inferior_ptid
!= null_ptid
&& target_has_execution ())
329 /* Bail out before killing the program if we will not be able to
331 target_require_runnable ();
334 && !query (_("The program being debugged has been started already.\n\
335 Start it from the beginning? ")))
336 error (_("Program not restarted."));
341 /* See inferior.h. */
344 prepare_execution_command (struct target_ops
*target
, int background
)
346 /* If we get a request for running in the bg but the target
347 doesn't support it, error out. */
348 if (background
&& !target_can_async_p (target
))
349 error (_("Asynchronous execution not supported on this target."));
353 /* If we get a request for running in the fg, then we need to
354 simulate synchronous (fg) execution. Note no cleanup is
355 necessary for this. stdin is re-enabled whenever an error
356 reaches the top level. */
357 all_uis_on_sync_execution_starting ();
361 /* Determine how the new inferior will behave. */
365 /* Run program without any explicit stop during startup. */
368 /* Stop at the beginning of the program's main function. */
371 /* Stop at the first instruction of the program. */
372 RUN_STOP_AT_FIRST_INSN
375 /* Implement the "run" command. Force a stop during program start if
376 requested by RUN_HOW. */
379 run_command_1 (const char *args
, int from_tty
, enum run_how run_how
)
381 const char *exec_file
;
382 struct ui_out
*uiout
= current_uiout
;
383 struct target_ops
*run_target
;
388 scoped_disable_commit_resumed
disable_commit_resumed ("running");
390 kill_if_already_running (from_tty
);
392 init_wait_for_inferior ();
393 clear_breakpoint_hit_counts ();
395 /* Clean up any leftovers from other runs. Some other things from
396 this function should probably be moved into target_pre_inferior. */
397 target_pre_inferior (from_tty
);
399 /* The comment here used to read, "The exec file is re-read every
400 time we do a generic_mourn_inferior, so we just have to worry
401 about the symbol file." The `generic_mourn_inferior' function
402 gets called whenever the program exits. However, suppose the
403 program exits, and *then* the executable file changes? We need
404 to check again here. Since reopen_exec_file doesn't do anything
405 if the timestamp hasn't changed, I don't see the harm. */
407 reread_symbols (from_tty
);
409 gdb::unique_xmalloc_ptr
<char> stripped
= strip_bg_char (args
, &async_exec
);
410 args
= stripped
.get ();
412 /* Do validation and preparation before possibly changing anything
415 run_target
= find_run_target ();
417 prepare_execution_command (run_target
, async_exec
);
419 if (non_stop
&& !run_target
->supports_non_stop ())
420 error (_("The target does not support running in non-stop mode."));
422 /* Done. Can now set breakpoints, change inferior args, etc. */
424 /* Insert temporary breakpoint in main function if requested. */
425 if (run_how
== RUN_STOP_AT_MAIN
)
427 /* To avoid other inferiors hitting this breakpoint, make it
428 inferior-specific using a condition. A better solution would be to
429 have proper inferior-specific breakpoint support, in the breakpoint
430 machinery. We could then avoid inserting a breakpoint in the program
431 spaces unrelated to this inferior. */
433 = ((current_language
->la_language
== language_ada
434 || current_language
->la_language
== language_pascal
435 || current_language
->la_language
== language_m2
) ? "=" : "==");
436 std::string arg
= string_printf
437 ("-qualified %s if $_inferior %s %d", main_name (), op
,
438 current_inferior ()->num
);
439 tbreak_command (arg
.c_str (), 0);
442 exec_file
= get_exec_file (0);
444 /* We keep symbols from add-symbol-file, on the grounds that the
445 user might want to add some symbols before running the program
446 (right?). But sometimes (dynamic loading where the user manually
447 introduces the new symbols with add-symbol-file), the code which
448 the symbols describe does not persist between runs. Currently
449 the user has to manually nuke all symbols between runs if they
450 want them to go away (PR 2207). This is probably reasonable. */
452 /* If there were other args, beside '&', process them. */
454 current_inferior ()->set_args (args
);
458 uiout
->field_string (nullptr, "Starting program");
461 uiout
->field_string ("execfile", exec_file
,
462 file_name_style
.style ());
464 uiout
->field_string ("infargs", current_inferior ()->args ());
469 run_target
->create_inferior (exec_file
,
470 current_inferior ()->args (),
471 current_inferior ()->environment
.envp (),
473 /* to_create_inferior should push the target, so after this point we
474 shouldn't refer to run_target again. */
475 run_target
= nullptr;
477 infrun_debug_show_threads ("immediately after create_process",
478 current_inferior ()->non_exited_threads ());
480 /* We're starting off a new process. When we get out of here, in
481 non-stop mode, finish the state of all threads of that process,
482 but leave other threads alone, as they may be stopped in internal
483 events --- the frontend shouldn't see them as stopped. In
484 all-stop, always finish the state of all threads, as we may be
485 resuming more than just the new process. */
486 process_stratum_target
*finish_target
;
490 finish_target
= current_inferior ()->process_target ();
491 finish_ptid
= ptid_t (current_inferior ()->pid
);
495 finish_target
= nullptr;
496 finish_ptid
= minus_one_ptid
;
498 scoped_finish_thread_state
finish_state (finish_target
, finish_ptid
);
500 /* Pass zero for FROM_TTY, because at this point the "run" command
501 has done its thing; now we are setting up the running program. */
502 post_create_inferior (0);
504 /* Queue a pending event so that the program stops immediately. */
505 if (run_how
== RUN_STOP_AT_FIRST_INSN
)
507 thread_info
*thr
= inferior_thread ();
508 target_waitstatus ws
;
509 ws
.set_stopped (GDB_SIGNAL_0
);
510 thr
->set_pending_waitstatus (ws
);
513 /* Start the target running. Do not use -1 continuation as it would skip
514 breakpoint right at the entry point. */
515 proceed (regcache_read_pc (get_current_regcache ()), GDB_SIGNAL_0
);
517 /* Since there was no error, there's no need to finish the thread
519 finish_state
.release ();
521 disable_commit_resumed
.reset_and_commit ();
525 run_command (const char *args
, int from_tty
)
527 run_command_1 (args
, from_tty
, RUN_NORMAL
);
530 /* Start the execution of the program up until the beginning of the main
534 start_command (const char *args
, int from_tty
)
536 /* Some languages such as Ada need to search inside the program
537 minimal symbols for the location where to put the temporary
538 breakpoint before starting. */
539 if (!have_minimal_symbols ())
540 error (_("No symbol table loaded. Use the \"file\" command."));
542 /* Run the program until reaching the main procedure... */
543 run_command_1 (args
, from_tty
, RUN_STOP_AT_MAIN
);
546 /* Start the execution of the program stopping at the first
550 starti_command (const char *args
, int from_tty
)
552 run_command_1 (args
, from_tty
, RUN_STOP_AT_FIRST_INSN
);
556 proceed_thread_callback (struct thread_info
*thread
, void *arg
)
558 /* We go through all threads individually instead of compressing
559 into a single target `resume_all' request, because some threads
560 may be stopped in internal breakpoints/events, or stopped waiting
561 for its turn in the displaced stepping queue (that is, they are
562 running && !executing). The target side has no idea about why
563 the thread is stopped, so a `resume_all' command would resume too
564 much. If/when GDB gains a way to tell the target `hold this
565 thread stopped until I say otherwise', then we can optimize
567 if (thread
->state
!= THREAD_STOPPED
)
570 if (!thread
->inf
->has_execution ())
573 switch_to_thread (thread
);
574 clear_proceed_status (0);
575 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
580 ensure_valid_thread (void)
582 if (inferior_ptid
== null_ptid
583 || inferior_thread ()->state
== THREAD_EXITED
)
584 error (_("Cannot execute this command without a live selected thread."));
587 /* If the user is looking at trace frames, any resumption of execution
588 is likely to mix up recorded and live target data. So simply
589 disallow those commands. */
592 ensure_not_tfind_mode (void)
594 if (get_traceframe_number () >= 0)
595 error (_("Cannot execute this command while looking at trace frames."));
598 /* Throw an error indicating the current thread is running. */
601 error_is_running (void)
603 error (_("Cannot execute this command while "
604 "the selected thread is running."));
607 /* Calls error_is_running if the current thread is running. */
610 ensure_not_running (void)
612 if (inferior_thread ()->state
== THREAD_RUNNING
)
617 continue_1 (int all_threads
)
620 ensure_not_tfind_mode ();
622 if (non_stop
&& all_threads
)
624 /* Don't error out if the current thread is running, because
625 there may be other stopped threads. */
627 /* Backup current thread and selected frame and restore on scope
629 scoped_restore_current_thread restore_thread
;
630 scoped_disable_commit_resumed disable_commit_resumed
631 ("continue all threads in non-stop");
633 iterate_over_threads (proceed_thread_callback
, nullptr);
635 if (current_ui
->prompt_state
== PROMPT_BLOCKED
)
637 /* If all threads in the target were already running,
638 proceed_thread_callback ends up never calling proceed,
639 and so nothing calls this to put the inferior's terminal
640 settings in effect and remove stdin from the event loop,
641 which we must when running a foreground command. E.g.:
645 <all threads are running now>
648 <no thread was resumed, but the inferior now owns the terminal>
650 target_terminal::inferior ();
653 disable_commit_resumed
.reset_and_commit ();
657 ensure_valid_thread ();
658 ensure_not_running ();
659 clear_proceed_status (0);
660 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
664 /* continue [-a] [proceed-count] [&] */
667 continue_command (const char *args
, int from_tty
)
670 bool all_threads_p
= false;
674 /* Find out whether we must run in the background. */
675 gdb::unique_xmalloc_ptr
<char> stripped
= strip_bg_char (args
, &async_exec
);
676 args
= stripped
.get ();
680 if (startswith (args
, "-a"))
682 all_threads_p
= true;
683 args
+= sizeof ("-a") - 1;
689 if (!non_stop
&& all_threads_p
)
690 error (_("`-a' is meaningless in all-stop mode."));
692 if (args
!= nullptr && all_threads_p
)
693 error (_("Can't resume all threads and specify "
694 "proceed count simultaneously."));
696 /* If we have an argument left, set proceed count of breakpoint we
700 bpstat
*bs
= nullptr;
703 struct thread_info
*tp
;
706 tp
= inferior_thread ();
709 process_stratum_target
*last_target
;
712 get_last_target_status (&last_target
, &last_ptid
, nullptr);
713 tp
= find_thread_ptid (last_target
, last_ptid
);
716 bs
= tp
->control
.stop_bpstat
;
718 while ((stat
= bpstat_num (&bs
, &num
)) != 0)
721 set_ignore_count (num
,
722 parse_and_eval_long (args
) - 1,
724 /* set_ignore_count prints a message ending with a period.
725 So print two spaces before "Continuing.". */
731 if (!stopped
&& from_tty
)
734 ("Not stopped at any breakpoint; argument ignored.\n");
739 ensure_not_tfind_mode ();
741 if (!non_stop
|| !all_threads_p
)
743 ensure_valid_thread ();
744 ensure_not_running ();
747 prepare_execution_command (current_inferior ()->top_target (), async_exec
);
750 gdb_printf (_("Continuing.\n"));
752 continue_1 (all_threads_p
);
755 /* Record in TP the starting point of a "step" or "next" command. */
758 set_step_frame (thread_info
*tp
)
760 /* This can be removed once this function no longer implicitly relies on the
761 inferior_ptid value. */
762 gdb_assert (inferior_ptid
== tp
->ptid
);
764 frame_info_ptr frame
= get_current_frame ();
766 symtab_and_line sal
= find_frame_sal (frame
);
767 set_step_info (tp
, frame
, sal
);
769 CORE_ADDR pc
= get_frame_pc (frame
);
770 tp
->control
.step_start_function
= find_pc_function (pc
);
773 /* Step until outside of current statement. */
776 step_command (const char *count_string
, int from_tty
)
778 step_1 (0, 0, count_string
);
781 /* Likewise, but skip over subroutine calls as if single instructions. */
784 next_command (const char *count_string
, int from_tty
)
786 step_1 (1, 0, count_string
);
789 /* Likewise, but step only one instruction. */
792 stepi_command (const char *count_string
, int from_tty
)
794 step_1 (0, 1, count_string
);
798 nexti_command (const char *count_string
, int from_tty
)
800 step_1 (1, 1, count_string
);
803 /* Data for the FSM that manages the step/next/stepi/nexti
806 struct step_command_fsm
: public thread_fsm
808 /* How many steps left in a "step N"-like command. */
811 /* If true, this is a next/nexti, otherwise a step/stepi. */
812 int skip_subroutines
;
814 /* If true, this is a stepi/nexti, otherwise a step/step. */
817 explicit step_command_fsm (struct interp
*cmd_interp
)
818 : thread_fsm (cmd_interp
)
822 void clean_up (struct thread_info
*thread
) override
;
823 bool should_stop (struct thread_info
*thread
) override
;
824 enum async_reply_reason
do_async_reply_reason () override
;
827 /* Prepare for a step/next/etc. command. Any target resource
828 allocated here is undone in the FSM's clean_up method. */
831 step_command_fsm_prepare (struct step_command_fsm
*sm
,
832 int skip_subroutines
, int single_inst
,
833 int count
, struct thread_info
*thread
)
835 sm
->skip_subroutines
= skip_subroutines
;
836 sm
->single_inst
= single_inst
;
839 /* Leave the si command alone. */
840 if (!sm
->single_inst
|| sm
->skip_subroutines
)
841 set_longjmp_breakpoint (thread
, get_frame_id (get_current_frame ()));
843 thread
->control
.stepping_command
= 1;
846 static int prepare_one_step (thread_info
*, struct step_command_fsm
*sm
);
849 step_1 (int skip_subroutines
, int single_inst
, const char *count_string
)
853 struct thread_info
*thr
;
854 struct step_command_fsm
*step_sm
;
857 ensure_not_tfind_mode ();
858 ensure_valid_thread ();
859 ensure_not_running ();
861 gdb::unique_xmalloc_ptr
<char> stripped
862 = strip_bg_char (count_string
, &async_exec
);
863 count_string
= stripped
.get ();
865 prepare_execution_command (current_inferior ()->top_target (), async_exec
);
867 count
= count_string
? parse_and_eval_long (count_string
) : 1;
869 clear_proceed_status (1);
871 /* Setup the execution command state machine to handle all the COUNT
873 thr
= inferior_thread ();
874 step_sm
= new step_command_fsm (command_interp ());
875 thr
->set_thread_fsm (std::unique_ptr
<thread_fsm
> (step_sm
));
877 step_command_fsm_prepare (step_sm
, skip_subroutines
,
878 single_inst
, count
, thr
);
880 /* Do only one step for now, before returning control to the event
881 loop. Let the continuation figure out how many other steps we
882 need to do, and handle them one at the time, through
884 if (!prepare_one_step (thr
, step_sm
))
885 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
888 /* Stepped into an inline frame. Pretend that we've
890 thr
->thread_fsm ()->clean_up (thr
);
891 bool proceeded
= normal_stop ();
893 inferior_event_handler (INF_EXEC_COMPLETE
);
894 all_uis_check_sync_execution_done ();
898 /* Implementation of the 'should_stop' FSM method for stepping
899 commands. Called after we are done with one step operation, to
900 check whether we need to step again, before we print the prompt and
901 return control to the user. If count is > 1, returns false, as we
902 will need to keep going. */
905 step_command_fsm::should_stop (struct thread_info
*tp
)
907 if (tp
->control
.stop_step
)
909 /* There are more steps to make, and we did stop due to
910 ending a stepping range. Do another step. */
912 return prepare_one_step (tp
, this);
920 /* Implementation of the 'clean_up' FSM method for stepping commands. */
923 step_command_fsm::clean_up (struct thread_info
*thread
)
925 if (!single_inst
|| skip_subroutines
)
926 delete_longjmp_breakpoint (thread
->global_num
);
929 /* Implementation of the 'async_reply_reason' FSM method for stepping
932 enum async_reply_reason
933 step_command_fsm::do_async_reply_reason ()
935 return EXEC_ASYNC_END_STEPPING_RANGE
;
938 /* Prepare for one step in "step N". The actual target resumption is
939 done by the caller. Return true if we're done and should thus
940 report a stop to the user. Returns false if the target needs to be
944 prepare_one_step (thread_info
*tp
, struct step_command_fsm
*sm
)
946 /* This can be removed once this function no longer implicitly relies on the
947 inferior_ptid value. */
948 gdb_assert (inferior_ptid
== tp
->ptid
);
952 frame_info_ptr frame
= get_current_frame ();
956 if (!sm
->single_inst
)
960 /* Step at an inlined function behaves like "down". */
961 if (!sm
->skip_subroutines
962 && inline_skipped_frames (tp
))
965 const char *fn
= nullptr;
969 /* Pretend that we've ran. */
970 resume_ptid
= user_visible_resume_ptid (1);
971 set_running (tp
->inf
->process_target (), resume_ptid
, true);
973 step_into_inline_frame (tp
);
975 frame
= get_current_frame ();
976 sal
= find_frame_sal (frame
);
977 sym
= get_frame_function (frame
);
980 fn
= sym
->print_name ();
983 || !function_name_is_marked_for_skip (fn
, sal
))
986 return prepare_one_step (tp
, sm
);
990 pc
= get_frame_pc (frame
);
991 find_pc_line_pc_range (pc
,
992 &tp
->control
.step_range_start
,
993 &tp
->control
.step_range_end
);
995 /* There's a problem in gcc (PR gcc/98780) that causes missing line
996 table entries, which results in a too large stepping range.
997 Use inlined_subroutine info to make the range more narrow. */
998 if (inline_skipped_frames (tp
) > 0)
1000 symbol
*sym
= inline_skipped_symbol (tp
);
1001 if (sym
->aclass () == LOC_BLOCK
)
1003 const block
*block
= sym
->value_block ();
1004 if (block
->end () < tp
->control
.step_range_end
)
1005 tp
->control
.step_range_end
= block
->end ();
1009 tp
->control
.may_range_step
= 1;
1011 /* If we have no line info, switch to stepi mode. */
1012 if (tp
->control
.step_range_end
== 0 && step_stop_if_no_debug
)
1014 tp
->control
.step_range_start
= tp
->control
.step_range_end
= 1;
1015 tp
->control
.may_range_step
= 0;
1017 else if (tp
->control
.step_range_end
== 0)
1021 if (find_pc_partial_function (pc
, &name
,
1022 &tp
->control
.step_range_start
,
1023 &tp
->control
.step_range_end
) == 0)
1024 error (_("Cannot find bounds of current function"));
1026 target_terminal::ours_for_output ();
1027 gdb_printf (_("Single stepping until exit from function %s,"
1028 "\nwhich has no line number information.\n"),
1034 /* Say we are stepping, but stop after one insn whatever it does. */
1035 tp
->control
.step_range_start
= tp
->control
.step_range_end
= 1;
1036 if (!sm
->skip_subroutines
)
1038 Don't step over function calls, not even to functions lacking
1040 tp
->control
.step_over_calls
= STEP_OVER_NONE
;
1043 if (sm
->skip_subroutines
)
1044 tp
->control
.step_over_calls
= STEP_OVER_ALL
;
1050 sm
->set_finished ();
1055 /* Continue program at specified address. */
1058 jump_command (const char *arg
, int from_tty
)
1060 struct gdbarch
*gdbarch
= get_current_arch ();
1067 ensure_not_tfind_mode ();
1068 ensure_valid_thread ();
1069 ensure_not_running ();
1071 /* Find out whether we must run in the background. */
1072 gdb::unique_xmalloc_ptr
<char> stripped
= strip_bg_char (arg
, &async_exec
);
1073 arg
= stripped
.get ();
1075 prepare_execution_command (current_inferior ()->top_target (), async_exec
);
1078 error_no_arg (_("starting address"));
1080 std::vector
<symtab_and_line
> sals
1081 = decode_line_with_last_displayed (arg
, DECODE_LINE_FUNFIRSTLINE
);
1082 if (sals
.size () != 1)
1083 error (_("Unreasonable jump request"));
1085 symtab_and_line
&sal
= sals
[0];
1087 if (sal
.symtab
== 0 && sal
.pc
== 0)
1088 error (_("No source file has been specified."));
1090 resolve_sal_pc (&sal
); /* May error out. */
1092 /* See if we are trying to jump to another function. */
1093 fn
= get_frame_function (get_current_frame ());
1094 sfn
= find_pc_function (sal
.pc
);
1095 if (fn
!= nullptr && sfn
!= fn
)
1097 if (!query (_("Line %d is not in `%s'. Jump anyway? "), sal
.line
,
1100 error (_("Not confirmed."));
1107 struct obj_section
*section
;
1109 section
= sfn
->obj_section (sfn
->objfile ());
1110 if (section_is_overlay (section
)
1111 && !section_is_mapped (section
))
1113 if (!query (_("WARNING!!! Destination is in "
1114 "unmapped overlay! Jump anyway? ")))
1116 error (_("Not confirmed."));
1126 gdb_printf (_("Continuing at "));
1127 gdb_puts (paddress (gdbarch
, addr
));
1131 clear_proceed_status (0);
1132 proceed (addr
, GDB_SIGNAL_0
);
1135 /* Continue program giving it specified signal. */
1138 signal_command (const char *signum_exp
, int from_tty
)
1140 enum gdb_signal oursig
;
1143 dont_repeat (); /* Too dangerous. */
1145 ensure_not_tfind_mode ();
1146 ensure_valid_thread ();
1147 ensure_not_running ();
1149 /* Find out whether we must run in the background. */
1150 gdb::unique_xmalloc_ptr
<char> stripped
1151 = strip_bg_char (signum_exp
, &async_exec
);
1152 signum_exp
= stripped
.get ();
1154 prepare_execution_command (current_inferior ()->top_target (), async_exec
);
1157 error_no_arg (_("signal number"));
1159 /* It would be even slicker to make signal names be valid expressions,
1160 (the type could be "enum $signal" or some such), then the user could
1161 assign them to convenience variables. */
1162 oursig
= gdb_signal_from_name (signum_exp
);
1164 if (oursig
== GDB_SIGNAL_UNKNOWN
)
1166 /* No, try numeric. */
1167 int num
= parse_and_eval_long (signum_exp
);
1170 oursig
= GDB_SIGNAL_0
;
1172 oursig
= gdb_signal_from_command (num
);
1175 /* Look for threads other than the current that this command ends up
1176 resuming too (due to schedlock off), and warn if they'll get a
1177 signal delivered. "signal 0" is used to suppress a previous
1178 signal, but if the current thread is no longer the one that got
1179 the signal, then the user is potentially suppressing the signal
1180 of the wrong thread. */
1183 int must_confirm
= 0;
1185 /* This indicates what will be resumed. Either a single thread,
1186 a whole process, or all threads of all processes. */
1187 ptid_t resume_ptid
= user_visible_resume_ptid (0);
1188 process_stratum_target
*resume_target
1189 = user_visible_resume_target (resume_ptid
);
1191 thread_info
*current
= inferior_thread ();
1193 for (thread_info
*tp
: all_non_exited_threads (resume_target
, resume_ptid
))
1198 if (tp
->stop_signal () != GDB_SIGNAL_0
1199 && signal_pass_state (tp
->stop_signal ()))
1202 gdb_printf (_("Note:\n"));
1203 gdb_printf (_(" Thread %s previously stopped with signal %s, %s.\n"),
1204 print_thread_id (tp
),
1205 gdb_signal_to_name (tp
->stop_signal ()),
1206 gdb_signal_to_string (tp
->stop_signal ()));
1212 && !query (_("Continuing thread %s (the current thread) with specified signal will\n"
1213 "still deliver the signals noted above to their respective threads.\n"
1214 "Continue anyway? "),
1215 print_thread_id (inferior_thread ())))
1216 error (_("Not confirmed."));
1221 if (oursig
== GDB_SIGNAL_0
)
1222 gdb_printf (_("Continuing with no signal.\n"));
1224 gdb_printf (_("Continuing with signal %s.\n"),
1225 gdb_signal_to_name (oursig
));
1228 clear_proceed_status (0);
1229 proceed ((CORE_ADDR
) -1, oursig
);
1232 /* Queue a signal to be delivered to the current thread. */
1235 queue_signal_command (const char *signum_exp
, int from_tty
)
1237 enum gdb_signal oursig
;
1238 struct thread_info
*tp
;
1241 ensure_not_tfind_mode ();
1242 ensure_valid_thread ();
1243 ensure_not_running ();
1245 if (signum_exp
== nullptr)
1246 error_no_arg (_("signal number"));
1248 /* It would be even slicker to make signal names be valid expressions,
1249 (the type could be "enum $signal" or some such), then the user could
1250 assign them to convenience variables. */
1251 oursig
= gdb_signal_from_name (signum_exp
);
1253 if (oursig
== GDB_SIGNAL_UNKNOWN
)
1255 /* No, try numeric. */
1256 int num
= parse_and_eval_long (signum_exp
);
1259 oursig
= GDB_SIGNAL_0
;
1261 oursig
= gdb_signal_from_command (num
);
1264 if (oursig
!= GDB_SIGNAL_0
1265 && !signal_pass_state (oursig
))
1266 error (_("Signal handling set to not pass this signal to the program."));
1268 tp
= inferior_thread ();
1269 tp
->set_stop_signal (oursig
);
1272 /* Data for the FSM that manages the until (with no argument)
1275 struct until_next_fsm
: public thread_fsm
1277 /* The thread that as current when the command was executed. */
1280 until_next_fsm (struct interp
*cmd_interp
, int thread
)
1281 : thread_fsm (cmd_interp
),
1286 bool should_stop (struct thread_info
*thread
) override
;
1287 void clean_up (struct thread_info
*thread
) override
;
1288 enum async_reply_reason
do_async_reply_reason () override
;
1291 /* Implementation of the 'should_stop' FSM method for the until (with
1295 until_next_fsm::should_stop (struct thread_info
*tp
)
1297 if (tp
->control
.stop_step
)
1303 /* Implementation of the 'clean_up' FSM method for the until (with no
1307 until_next_fsm::clean_up (struct thread_info
*thread
)
1309 delete_longjmp_breakpoint (thread
->global_num
);
1312 /* Implementation of the 'async_reply_reason' FSM method for the until
1313 (with no arg) command. */
1315 enum async_reply_reason
1316 until_next_fsm::do_async_reply_reason ()
1318 return EXEC_ASYNC_END_STEPPING_RANGE
;
1321 /* Proceed until we reach a different source line with pc greater than
1322 our current one or exit the function. We skip calls in both cases.
1324 Note that eventually this command should probably be changed so
1325 that only source lines are printed out when we hit the breakpoint
1326 we set. This may involve changes to wait_for_inferior and the
1327 proceed status code. */
1330 until_next_command (int from_tty
)
1332 frame_info_ptr frame
;
1334 struct symbol
*func
;
1335 struct symtab_and_line sal
;
1336 struct thread_info
*tp
= inferior_thread ();
1337 int thread
= tp
->global_num
;
1338 struct until_next_fsm
*sm
;
1340 clear_proceed_status (0);
1341 set_step_frame (tp
);
1343 frame
= get_current_frame ();
1345 /* Step until either exited from this function or greater
1346 than the current line (if in symbolic section) or pc (if
1349 pc
= get_frame_pc (frame
);
1350 func
= find_pc_function (pc
);
1354 struct bound_minimal_symbol msymbol
= lookup_minimal_symbol_by_pc (pc
);
1356 if (msymbol
.minsym
== nullptr)
1357 error (_("Execution is not within a known function."));
1359 tp
->control
.step_range_start
= msymbol
.value_address ();
1360 /* The upper-bound of step_range is exclusive. In order to make PC
1361 within the range, set the step_range_end with PC + 1. */
1362 tp
->control
.step_range_end
= pc
+ 1;
1366 sal
= find_pc_line (pc
, 0);
1368 tp
->control
.step_range_start
= func
->value_block ()->entry_pc ();
1369 tp
->control
.step_range_end
= sal
.end
;
1371 /* By setting the step_range_end based on the current pc, we are
1372 assuming that the last line table entry for any given source line
1373 will have is_stmt set to true. This is not necessarily the case,
1374 there may be additional entries for the same source line with
1375 is_stmt set false. Consider the following code:
1377 for (int i = 0; i < 10; i++)
1380 Clang-13, will generate multiple line table entries at the end of
1381 the loop all associated with the 'for' line. The first of these
1382 entries is marked is_stmt true, but the other entries are is_stmt
1385 If we only use the values in SAL, then our stepping range may not
1386 extend to the end of the loop. The until command will reach the
1387 end of the range, find a non is_stmt instruction, and step to the
1388 next is_stmt instruction. This stopping point, however, will be
1389 inside the loop, which is not what we wanted.
1391 Instead, we now check any subsequent line table entries to see if
1392 they are for the same line. If they are, and they are marked
1393 is_stmt false, then we extend the end of our stepping range.
1395 When we finish this process the end of the stepping range will
1396 point either to a line with a different line number, or, will
1397 point at an address for the same line number that is marked as a
1400 struct symtab_and_line final_sal
1401 = find_pc_line (tp
->control
.step_range_end
, 0);
1403 while (final_sal
.line
== sal
.line
&& final_sal
.symtab
== sal
.symtab
1404 && !final_sal
.is_stmt
)
1406 tp
->control
.step_range_end
= final_sal
.end
;
1407 final_sal
= find_pc_line (final_sal
.end
, 0);
1410 tp
->control
.may_range_step
= 1;
1412 tp
->control
.step_over_calls
= STEP_OVER_ALL
;
1414 set_longjmp_breakpoint (tp
, get_frame_id (frame
));
1415 delete_longjmp_breakpoint_cleanup
lj_deleter (thread
);
1417 sm
= new until_next_fsm (command_interp (), tp
->global_num
);
1418 tp
->set_thread_fsm (std::unique_ptr
<thread_fsm
> (sm
));
1419 lj_deleter
.release ();
1421 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
1425 until_command (const char *arg
, int from_tty
)
1430 ensure_not_tfind_mode ();
1431 ensure_valid_thread ();
1432 ensure_not_running ();
1434 /* Find out whether we must run in the background. */
1435 gdb::unique_xmalloc_ptr
<char> stripped
= strip_bg_char (arg
, &async_exec
);
1436 arg
= stripped
.get ();
1438 prepare_execution_command (current_inferior ()->top_target (), async_exec
);
1441 until_break_command (arg
, from_tty
, 0);
1443 until_next_command (from_tty
);
1447 advance_command (const char *arg
, int from_tty
)
1452 ensure_not_tfind_mode ();
1453 ensure_valid_thread ();
1454 ensure_not_running ();
1457 error_no_arg (_("a location"));
1459 /* Find out whether we must run in the background. */
1460 gdb::unique_xmalloc_ptr
<char> stripped
= strip_bg_char (arg
, &async_exec
);
1461 arg
= stripped
.get ();
1463 prepare_execution_command (current_inferior ()->top_target (), async_exec
);
1465 until_break_command (arg
, from_tty
, 1);
1468 /* See inferior.h. */
1471 get_return_value (struct symbol
*func_symbol
, struct value
*function
)
1473 regcache
*stop_regs
= get_current_regcache ();
1474 struct gdbarch
*gdbarch
= stop_regs
->arch ();
1475 struct value
*value
;
1477 struct type
*value_type
1478 = check_typedef (func_symbol
->type ()->target_type ());
1479 gdb_assert (value_type
->code () != TYPE_CODE_VOID
);
1481 if (is_nocall_function (check_typedef (::value_type (function
))))
1483 warning (_("Function '%s' does not follow the target calling "
1484 "convention, cannot determine its returned value."),
1485 func_symbol
->print_name ());
1490 /* FIXME: 2003-09-27: When returning from a nested inferior function
1491 call, it's possible (with no help from the architecture vector)
1492 to locate and return/print a "struct return" value. This is just
1493 a more complicated case of what is already being done in the
1494 inferior function call code. In fact, when inferior function
1495 calls are made async, this will likely be made the norm. */
1497 switch (gdbarch_return_value_as_value (gdbarch
, function
, value_type
,
1498 nullptr, nullptr, nullptr))
1500 case RETURN_VALUE_REGISTER_CONVENTION
:
1501 case RETURN_VALUE_ABI_RETURNS_ADDRESS
:
1502 case RETURN_VALUE_ABI_PRESERVES_ADDRESS
:
1503 gdbarch_return_value_as_value (gdbarch
, function
, value_type
, stop_regs
,
1506 case RETURN_VALUE_STRUCT_CONVENTION
:
1510 internal_error (_("bad switch"));
1516 /* The captured function return value/type and its position in the
1519 struct return_value_info
1521 /* The captured return value. May be NULL if we weren't able to
1522 retrieve it. See get_return_value. */
1523 struct value
*value
;
1525 /* The return type. In some cases, we'll not be able extract the
1526 return value, but we always know the type. */
1529 /* If we captured a value, this is the value history index. */
1530 int value_history_index
;
1533 /* Helper for print_return_value. */
1536 print_return_value_1 (struct ui_out
*uiout
, struct return_value_info
*rv
)
1538 if (rv
->value
!= nullptr)
1541 uiout
->text ("Value returned is ");
1542 uiout
->field_fmt ("gdb-result-var", "$%d",
1543 rv
->value_history_index
);
1544 uiout
->text (" = ");
1548 struct value_print_options opts
;
1549 get_user_print_options (&opts
);
1552 value_print (rv
->value
, &stb
, &opts
);
1553 uiout
->field_stream ("return-value", stb
);
1556 uiout
->field_string ("return-value", _("<not displayed>"),
1557 metadata_style
.style ());
1562 std::string type_name
= type_to_string (rv
->type
);
1563 uiout
->text ("Value returned has type: ");
1564 uiout
->field_string ("return-type", type_name
);
1566 uiout
->text (" Cannot determine contents\n");
1570 /* Print the result of a function at the end of a 'finish' command.
1571 RV points at an object representing the captured return value/type
1572 and its position in the value history. */
1575 print_return_value (struct ui_out
*uiout
, struct return_value_info
*rv
)
1577 if (rv
->type
== nullptr
1578 || check_typedef (rv
->type
)->code () == TYPE_CODE_VOID
)
1583 /* print_return_value_1 can throw an exception in some
1584 circumstances. We need to catch this so that we still
1585 delete the breakpoint. */
1586 print_return_value_1 (uiout
, rv
);
1588 catch (const gdb_exception
&ex
)
1590 exception_print (gdb_stdout
, ex
);
1594 /* Data for the FSM that manages the finish command. */
1596 struct finish_command_fsm
: public thread_fsm
1598 /* The momentary breakpoint set at the function's return address in
1600 breakpoint_up breakpoint
;
1602 /* The function that we're stepping out of. */
1603 struct symbol
*function
= nullptr;
1605 /* If the FSM finishes successfully, this stores the function's
1607 struct return_value_info return_value_info
{};
1609 /* If the current function uses the "struct return convention",
1610 this holds the address at which the value being returned will
1611 be stored, or zero if that address could not be determined or
1612 the "struct return convention" is not being used. */
1613 CORE_ADDR return_buf
;
1615 explicit finish_command_fsm (struct interp
*cmd_interp
)
1616 : thread_fsm (cmd_interp
)
1620 bool should_stop (struct thread_info
*thread
) override
;
1621 void clean_up (struct thread_info
*thread
) override
;
1622 struct return_value_info
*return_value () override
;
1623 enum async_reply_reason
do_async_reply_reason () override
;
1626 /* Implementation of the 'should_stop' FSM method for the finish
1627 commands. Detects whether the thread stepped out of the function
1628 successfully, and if so, captures the function's return value and
1629 marks the FSM finished. */
1632 finish_command_fsm::should_stop (struct thread_info
*tp
)
1634 struct return_value_info
*rv
= &return_value_info
;
1636 if (function
!= nullptr
1637 && bpstat_find_breakpoint (tp
->control
.stop_bpstat
,
1638 breakpoint
.get ()) != nullptr)
1643 rv
->type
= function
->type ()->target_type ();
1644 if (rv
->type
== nullptr)
1645 internal_error (_("finish_command: function has no target type"));
1647 if (check_typedef (rv
->type
)->code () != TYPE_CODE_VOID
)
1651 func
= read_var_value (function
, nullptr, get_current_frame ());
1653 if (return_buf
!= 0)
1654 /* Retrieve return value from the buffer where it was saved. */
1655 rv
->value
= value_at (rv
->type
, return_buf
);
1657 rv
->value
= get_return_value (function
, func
);
1659 if (rv
->value
!= nullptr)
1660 rv
->value_history_index
= record_latest_value (rv
->value
);
1663 else if (tp
->control
.stop_step
)
1665 /* Finishing from an inline frame, or reverse finishing. In
1666 either case, there's no way to retrieve the return value. */
1673 /* Implementation of the 'clean_up' FSM method for the finish
1677 finish_command_fsm::clean_up (struct thread_info
*thread
)
1679 breakpoint
.reset ();
1680 delete_longjmp_breakpoint (thread
->global_num
);
1683 /* Implementation of the 'return_value' FSM method for the finish
1686 struct return_value_info
*
1687 finish_command_fsm::return_value ()
1689 return &return_value_info
;
1692 /* Implementation of the 'async_reply_reason' FSM method for the
1695 enum async_reply_reason
1696 finish_command_fsm::do_async_reply_reason ()
1698 if (execution_direction
== EXEC_REVERSE
)
1699 return EXEC_ASYNC_END_STEPPING_RANGE
;
1701 return EXEC_ASYNC_FUNCTION_FINISHED
;
1704 /* finish_backward -- helper function for finish_command. */
1707 finish_backward (struct finish_command_fsm
*sm
)
1709 struct symtab_and_line sal
;
1710 struct thread_info
*tp
= inferior_thread ();
1712 CORE_ADDR func_addr
;
1714 pc
= get_frame_pc (get_current_frame ());
1716 if (find_pc_partial_function (pc
, nullptr, &func_addr
, nullptr) == 0)
1717 error (_("Cannot find bounds of current function"));
1719 sal
= find_pc_line (func_addr
, 0);
1721 tp
->control
.proceed_to_finish
= 1;
1722 /* Special case: if we're sitting at the function entry point,
1723 then all we need to do is take a reverse singlestep. We
1724 don't need to set a breakpoint, and indeed it would do us
1727 Note that this can only happen at frame #0, since there's
1728 no way that a function up the stack can have a return address
1729 that's equal to its entry point. */
1733 frame_info_ptr frame
= get_selected_frame (nullptr);
1734 struct gdbarch
*gdbarch
= get_frame_arch (frame
);
1736 /* Set a step-resume at the function's entry point. Once that's
1737 hit, we'll do one more step backwards. */
1738 symtab_and_line sr_sal
;
1740 sr_sal
.pspace
= get_frame_program_space (frame
);
1741 insert_step_resume_breakpoint_at_sal (gdbarch
,
1742 sr_sal
, null_frame_id
);
1744 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
1748 /* We're almost there -- we just need to back up by one more
1750 tp
->control
.step_range_start
= tp
->control
.step_range_end
= 1;
1751 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
1755 /* finish_forward -- helper function for finish_command. FRAME is the
1756 frame that called the function we're about to step out of. */
1759 finish_forward (struct finish_command_fsm
*sm
, frame_info_ptr frame
)
1761 struct frame_id frame_id
= get_frame_id (frame
);
1762 struct gdbarch
*gdbarch
= get_frame_arch (frame
);
1763 struct symtab_and_line sal
;
1764 struct thread_info
*tp
= inferior_thread ();
1766 sal
= find_pc_line (get_frame_pc (frame
), 0);
1767 sal
.pc
= get_frame_pc (frame
);
1769 sm
->breakpoint
= set_momentary_breakpoint (gdbarch
, sal
,
1770 get_stack_frame_id (frame
),
1773 /* set_momentary_breakpoint invalidates FRAME. */
1776 set_longjmp_breakpoint (tp
, frame_id
);
1778 /* We want to print return value, please... */
1779 tp
->control
.proceed_to_finish
= 1;
1781 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
1784 /* Skip frames for "finish". */
1786 static frame_info_ptr
1787 skip_finish_frames (frame_info_ptr frame
)
1789 frame_info_ptr start
;
1795 frame
= skip_tailcall_frames (frame
);
1796 if (frame
== nullptr)
1799 frame
= skip_unwritable_frames (frame
);
1800 if (frame
== nullptr)
1803 while (start
!= frame
);
1808 /* "finish": Set a temporary breakpoint at the place the selected
1809 frame will return to, then continue. */
1812 finish_command (const char *arg
, int from_tty
)
1814 frame_info_ptr frame
;
1816 struct finish_command_fsm
*sm
;
1817 struct thread_info
*tp
;
1820 ensure_not_tfind_mode ();
1821 ensure_valid_thread ();
1822 ensure_not_running ();
1824 /* Find out whether we must run in the background. */
1825 gdb::unique_xmalloc_ptr
<char> stripped
= strip_bg_char (arg
, &async_exec
);
1826 arg
= stripped
.get ();
1828 prepare_execution_command (current_inferior ()->top_target (), async_exec
);
1831 error (_("The \"finish\" command does not take any arguments."));
1833 frame
= get_prev_frame (get_selected_frame (_("No selected frame.")));
1835 error (_("\"finish\" not meaningful in the outermost frame."));
1837 clear_proceed_status (0);
1839 tp
= inferior_thread ();
1841 sm
= new finish_command_fsm (command_interp ());
1843 tp
->set_thread_fsm (std::unique_ptr
<thread_fsm
> (sm
));
1845 /* Finishing from an inline frame is completely different. We don't
1846 try to show the "return value" - no way to locate it. */
1847 if (get_frame_type (get_selected_frame (_("No selected frame.")))
1850 /* Claim we are stepping in the calling frame. An empty step
1851 range means that we will stop once we aren't in a function
1852 called by that frame. We don't use the magic "1" value for
1853 step_range_end, because then infrun will think this is nexti,
1854 and not step over the rest of this inlined function call. */
1855 set_step_info (tp
, frame
, {});
1856 tp
->control
.step_range_start
= get_frame_pc (frame
);
1857 tp
->control
.step_range_end
= tp
->control
.step_range_start
;
1858 tp
->control
.step_over_calls
= STEP_OVER_ALL
;
1860 /* Print info on the selected frame, including level number but not
1864 gdb_printf (_("Run till exit from "));
1865 print_stack_frame (get_selected_frame (nullptr), 1, LOCATION
, 0);
1868 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
1872 /* Find the function we will return from. */
1873 frame_info_ptr callee_frame
= get_selected_frame (nullptr);
1874 sm
->function
= find_pc_function (get_frame_pc (callee_frame
));
1875 sm
->return_buf
= 0; /* Initialize buffer address is not available. */
1877 /* Determine the return convention. If it is RETURN_VALUE_STRUCT_CONVENTION,
1878 attempt to determine the address of the return buffer. */
1879 if (sm
->function
!= nullptr)
1881 enum return_value_convention return_value
;
1882 struct gdbarch
*gdbarch
= get_frame_arch (callee_frame
);
1884 struct type
* val_type
1885 = check_typedef (sm
->function
->type ()->target_type ());
1888 = gdbarch_return_value_as_value (gdbarch
,
1889 read_var_value (sm
->function
, nullptr,
1891 val_type
, nullptr, nullptr, nullptr);
1893 if (return_value
== RETURN_VALUE_STRUCT_CONVENTION
1894 && val_type
->code () != TYPE_CODE_VOID
)
1895 sm
->return_buf
= gdbarch_get_return_buf_addr (gdbarch
, val_type
,
1899 /* Print info on the selected frame, including level number but not
1903 if (execution_direction
== EXEC_REVERSE
)
1904 gdb_printf (_("Run back to call of "));
1907 if (sm
->function
!= nullptr && TYPE_NO_RETURN (sm
->function
->type ())
1908 && !query (_("warning: Function %s does not return normally.\n"
1909 "Try to finish anyway? "),
1910 sm
->function
->print_name ()))
1911 error (_("Not confirmed."));
1912 gdb_printf (_("Run till exit from "));
1915 print_stack_frame (callee_frame
, 1, LOCATION
, 0);
1918 if (execution_direction
== EXEC_REVERSE
)
1919 finish_backward (sm
);
1922 frame
= skip_finish_frames (frame
);
1924 if (frame
== nullptr)
1925 error (_("Cannot find the caller frame."));
1927 finish_forward (sm
, frame
);
1933 info_program_command (const char *args
, int from_tty
)
1938 process_stratum_target
*proc_target
;
1940 if (!target_has_execution ())
1942 gdb_printf (_("The program being debugged is not being run.\n"));
1948 ptid
= inferior_ptid
;
1949 proc_target
= current_inferior ()->process_target ();
1952 get_last_target_status (&proc_target
, &ptid
, nullptr);
1954 if (ptid
== null_ptid
|| ptid
== minus_one_ptid
)
1955 error (_("No selected thread."));
1957 thread_info
*tp
= find_thread_ptid (proc_target
, ptid
);
1959 if (tp
->state
== THREAD_EXITED
)
1960 error (_("Invalid selected thread."));
1961 else if (tp
->state
== THREAD_RUNNING
)
1962 error (_("Selected thread is running."));
1964 bs
= tp
->control
.stop_bpstat
;
1965 stat
= bpstat_num (&bs
, &num
);
1967 target_files_info ();
1968 gdb_printf (_("Program stopped at %s.\n"),
1969 paddress (target_gdbarch (), tp
->stop_pc ()));
1970 if (tp
->control
.stop_step
)
1971 gdb_printf (_("It stopped after being stepped.\n"));
1974 /* There may be several breakpoints in the same place, so this
1975 isn't as strange as it seems. */
1980 gdb_printf (_("It stopped at a breakpoint "
1981 "that has since been deleted.\n"));
1984 gdb_printf (_("It stopped at breakpoint %d.\n"), num
);
1985 stat
= bpstat_num (&bs
, &num
);
1988 else if (tp
->stop_signal () != GDB_SIGNAL_0
)
1990 gdb_printf (_("It stopped with signal %s, %s.\n"),
1991 gdb_signal_to_name (tp
->stop_signal ()),
1992 gdb_signal_to_string (tp
->stop_signal ()));
1997 gdb_printf (_("Type \"info stack\" or \"info "
1998 "registers\" for more information.\n"));
2003 environment_info (const char *var
, int from_tty
)
2007 const char *val
= current_inferior ()->environment
.get (var
);
2018 gdb_puts ("Environment variable \"");
2020 gdb_puts ("\" not defined.\n");
2025 char **envp
= current_inferior ()->environment
.envp ();
2027 for (int idx
= 0; envp
[idx
] != nullptr; ++idx
)
2029 gdb_puts (envp
[idx
]);
2036 set_environment_command (const char *arg
, int from_tty
)
2038 const char *p
, *val
;
2042 error_no_arg (_("environment variable and value"));
2044 /* Find separation between variable name and value. */
2045 p
= (char *) strchr (arg
, '=');
2046 val
= (char *) strchr (arg
, ' ');
2048 if (p
!= 0 && val
!= 0)
2050 /* We have both a space and an equals. If the space is before the
2051 equals, walk forward over the spaces til we see a nonspace
2052 (possibly the equals). */
2057 /* Now if the = is after the char following the spaces,
2058 take the char following the spaces. */
2062 else if (val
!= 0 && p
== 0)
2066 error_no_arg (_("environment variable to set"));
2068 if (p
== 0 || p
[1] == 0)
2072 p
= arg
+ strlen (arg
); /* So that savestring below will work. */
2076 /* Not setting variable value to null. */
2078 while (*val
== ' ' || *val
== '\t')
2082 while (p
!= arg
&& (p
[-1] == ' ' || p
[-1] == '\t'))
2085 std::string
var (arg
, p
- arg
);
2088 gdb_printf (_("Setting environment variable "
2089 "\"%s\" to null value.\n"),
2091 current_inferior ()->environment
.set (var
.c_str (), "");
2094 current_inferior ()->environment
.set (var
.c_str (), val
);
2098 unset_environment_command (const char *var
, int from_tty
)
2102 /* If there is no argument, delete all environment variables.
2103 Ask for confirmation if reading from the terminal. */
2104 if (!from_tty
|| query (_("Delete all environment variables? ")))
2105 current_inferior ()->environment
.clear ();
2108 current_inferior ()->environment
.unset (var
);
2111 /* Handle the execution path (PATH variable). */
2113 static const char path_var_name
[] = "PATH";
2116 path_info (const char *args
, int from_tty
)
2118 gdb_puts ("Executable and object file path: ");
2119 gdb_puts (current_inferior ()->environment
.get (path_var_name
));
2123 /* Add zero or more directories to the front of the execution path. */
2126 path_command (const char *dirname
, int from_tty
)
2131 env
= current_inferior ()->environment
.get (path_var_name
);
2132 /* Can be null if path is not set. */
2135 std::string exec_path
= env
;
2136 mod_path (dirname
, exec_path
);
2137 current_inferior ()->environment
.set (path_var_name
, exec_path
.c_str ());
2139 path_info (nullptr, from_tty
);
2144 pad_to_column (string_file
&stream
, int col
)
2146 /* At least one space must be printed to separate columns. */
2148 const int size
= stream
.size ();
2150 stream
.puts (n_spaces (col
- size
));
2153 /* Print out the register NAME with value VAL, to FILE, in the default
2157 default_print_one_register_info (struct ui_file
*file
,
2161 struct type
*regtype
= value_type (val
);
2162 int print_raw_format
;
2163 string_file format_stream
;
2166 value_column_1
= 15,
2167 /* Give enough room for "0x", 16 hex digits and two spaces in
2168 preceding column. */
2169 value_column_2
= value_column_1
+ 2 + 16 + 2,
2172 format_stream
.puts (name
);
2173 pad_to_column (format_stream
, value_column_1
);
2175 print_raw_format
= (value_entirely_available (val
)
2176 && !value_optimized_out (val
));
2178 /* If virtual format is floating, print it that way, and in raw
2180 if (regtype
->code () == TYPE_CODE_FLT
2181 || regtype
->code () == TYPE_CODE_DECFLOAT
)
2183 struct value_print_options opts
;
2184 const gdb_byte
*valaddr
= value_contents_for_printing (val
).data ();
2185 enum bfd_endian byte_order
= type_byte_order (regtype
);
2187 get_user_print_options (&opts
);
2188 opts
.deref_ref
= true;
2190 common_val_print (val
, &format_stream
, 0, &opts
, current_language
);
2192 if (print_raw_format
)
2194 pad_to_column (format_stream
, value_column_2
);
2195 format_stream
.puts ("(raw ");
2196 print_hex_chars (&format_stream
, valaddr
, regtype
->length (),
2198 format_stream
.putc (')');
2203 struct value_print_options opts
;
2205 /* Print the register in hex. */
2206 get_formatted_print_options (&opts
, 'x');
2207 opts
.deref_ref
= true;
2208 common_val_print (val
, &format_stream
, 0, &opts
, current_language
);
2209 /* If not a vector register, print it also according to its
2211 if (print_raw_format
&& regtype
->is_vector () == 0)
2213 pad_to_column (format_stream
, value_column_2
);
2214 get_user_print_options (&opts
);
2215 opts
.deref_ref
= true;
2216 common_val_print (val
, &format_stream
, 0, &opts
, current_language
);
2220 gdb_puts (format_stream
.c_str (), file
);
2221 gdb_printf (file
, "\n");
2224 /* Print out the machine register regnum. If regnum is -1, print all
2225 registers (print_all == 1) or all non-float and non-vector
2226 registers (print_all == 0).
2228 For most machines, having all_registers_info() print the
2229 register(s) one per line is good enough. If a different format is
2230 required, (eg, for MIPS or Pyramid 90x, which both have lots of
2231 regs), or there is an existing convention for showing all the
2232 registers, define the architecture method PRINT_REGISTERS_INFO to
2233 provide that format. */
2236 default_print_registers_info (struct gdbarch
*gdbarch
,
2237 struct ui_file
*file
,
2238 frame_info_ptr frame
,
2239 int regnum
, int print_all
)
2242 const int numregs
= gdbarch_num_cooked_regs (gdbarch
);
2244 for (i
= 0; i
< numregs
; i
++)
2246 /* Decide between printing all regs, non-float / vector regs, or
2252 if (!gdbarch_register_reggroup_p (gdbarch
, i
, all_reggroup
))
2257 if (!gdbarch_register_reggroup_p (gdbarch
, i
, general_reggroup
))
2267 /* If the register name is empty, it is undefined for this
2268 processor, so don't display anything. */
2269 if (*(gdbarch_register_name (gdbarch
, i
)) == '\0')
2272 default_print_one_register_info (file
,
2273 gdbarch_register_name (gdbarch
, i
),
2274 value_of_register (i
, frame
));
2279 registers_info (const char *addr_exp
, int fpregs
)
2281 frame_info_ptr frame
;
2282 struct gdbarch
*gdbarch
;
2284 if (!target_has_registers ())
2285 error (_("The program has no registers now."));
2286 frame
= get_selected_frame (nullptr);
2287 gdbarch
= get_frame_arch (frame
);
2291 gdbarch_print_registers_info (gdbarch
, gdb_stdout
,
2296 while (*addr_exp
!= '\0')
2301 /* Skip leading white space. */
2302 addr_exp
= skip_spaces (addr_exp
);
2304 /* Discard any leading ``$''. Check that there is something
2305 resembling a register following it. */
2306 if (addr_exp
[0] == '$')
2308 if (isspace ((*addr_exp
)) || (*addr_exp
) == '\0')
2309 error (_("Missing register name"));
2311 /* Find the start/end of this register name/num/group. */
2313 while ((*addr_exp
) != '\0' && !isspace ((*addr_exp
)))
2317 /* Figure out what we've found and display it. */
2319 /* A register name? */
2321 int regnum
= user_reg_map_name_to_regnum (gdbarch
, start
, end
- start
);
2325 /* User registers lie completely outside of the range of
2326 normal registers. Catch them early so that the target
2328 if (regnum
>= gdbarch_num_cooked_regs (gdbarch
))
2330 struct value
*regval
= value_of_user_reg (regnum
, frame
);
2331 const char *regname
= user_reg_map_regnum_to_name (gdbarch
,
2334 /* Print in the same fashion
2335 gdbarch_print_registers_info's default
2336 implementation prints. */
2337 default_print_one_register_info (gdb_stdout
,
2342 gdbarch_print_registers_info (gdbarch
, gdb_stdout
,
2343 frame
, regnum
, fpregs
);
2348 /* A register group? */
2350 const struct reggroup
*group
= nullptr;
2351 for (const struct reggroup
*g
: gdbarch_reggroups (gdbarch
))
2353 /* Don't bother with a length check. Should the user
2354 enter a short register group name, go with the first
2355 group that matches. */
2356 if (strncmp (start
, g
->name (), end
- start
) == 0)
2362 if (group
!= nullptr)
2367 regnum
< gdbarch_num_cooked_regs (gdbarch
);
2370 if (gdbarch_register_reggroup_p (gdbarch
, regnum
, group
))
2371 gdbarch_print_registers_info (gdbarch
,
2379 /* Nothing matched. */
2380 error (_("Invalid register `%.*s'"), (int) (end
- start
), start
);
2385 info_all_registers_command (const char *addr_exp
, int from_tty
)
2387 registers_info (addr_exp
, 1);
2391 info_registers_command (const char *addr_exp
, int from_tty
)
2393 registers_info (addr_exp
, 0);
2397 print_vector_info (struct ui_file
*file
,
2398 frame_info_ptr frame
, const char *args
)
2400 struct gdbarch
*gdbarch
= get_frame_arch (frame
);
2402 if (gdbarch_print_vector_info_p (gdbarch
))
2403 gdbarch_print_vector_info (gdbarch
, file
, frame
, args
);
2407 int printed_something
= 0;
2409 for (regnum
= 0; regnum
< gdbarch_num_cooked_regs (gdbarch
); regnum
++)
2411 if (gdbarch_register_reggroup_p (gdbarch
, regnum
, vector_reggroup
))
2413 printed_something
= 1;
2414 gdbarch_print_registers_info (gdbarch
, file
, frame
, regnum
, 1);
2417 if (!printed_something
)
2418 gdb_printf (file
, "No vector information\n");
2423 info_vector_command (const char *args
, int from_tty
)
2425 if (!target_has_registers ())
2426 error (_("The program has no registers now."));
2428 print_vector_info (gdb_stdout
, get_selected_frame (nullptr), args
);
2431 /* Kill the inferior process. Make us have no inferior. */
2434 kill_command (const char *arg
, int from_tty
)
2436 /* FIXME: This should not really be inferior_ptid (or target_has_execution).
2437 It should be a distinct flag that indicates that a target is active, cuz
2438 some targets don't have processes! */
2440 if (inferior_ptid
== null_ptid
)
2441 error (_("The program is not being run."));
2442 if (!query (_("Kill the program being debugged? ")))
2443 error (_("Not confirmed."));
2445 int pid
= current_inferior ()->pid
;
2446 /* Save the pid as a string before killing the inferior, since that
2447 may unpush the current target, and we need the string after. */
2448 std::string pid_str
= target_pid_to_str (ptid_t (pid
));
2449 int infnum
= current_inferior ()->num
;
2452 bfd_cache_close_all ();
2454 if (print_inferior_events
)
2455 gdb_printf (_("[Inferior %d (%s) killed]\n"),
2456 infnum
, pid_str
.c_str ());
2459 /* Used in `attach&' command. Proceed threads of inferior INF iff
2460 they stopped due to debugger request, and when they did, they
2461 reported a clean stop (GDB_SIGNAL_0). Do not proceed threads that
2462 have been explicitly been told to stop. */
2465 proceed_after_attach (inferior
*inf
)
2467 /* Don't error out if the current thread is running, because
2468 there may be other stopped threads. */
2470 /* Backup current thread and selected frame. */
2471 scoped_restore_current_thread restore_thread
;
2473 for (thread_info
*thread
: inf
->non_exited_threads ())
2474 if (!thread
->executing ()
2475 && !thread
->stop_requested
2476 && thread
->stop_signal () == GDB_SIGNAL_0
)
2478 switch_to_thread (thread
);
2479 clear_proceed_status (0);
2480 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
2484 /* See inferior.h. */
2487 setup_inferior (int from_tty
)
2489 struct inferior
*inferior
;
2491 inferior
= current_inferior ();
2492 inferior
->needs_setup
= false;
2494 /* If no exec file is yet known, try to determine it from the
2496 if (get_exec_file (0) == nullptr)
2497 exec_file_locate_attach (inferior_ptid
.pid (), 1, from_tty
);
2500 reopen_exec_file ();
2501 reread_symbols (from_tty
);
2504 /* Take any necessary post-attaching actions for this platform. */
2505 target_post_attach (inferior_ptid
.pid ());
2507 post_create_inferior (from_tty
);
2510 /* What to do after the first program stops after attaching. */
2511 enum attach_post_wait_mode
2513 /* Do nothing. Leaves threads as they are. */
2514 ATTACH_POST_WAIT_NOTHING
,
2516 /* Re-resume threads that are marked running. */
2517 ATTACH_POST_WAIT_RESUME
,
2519 /* Stop all threads. */
2520 ATTACH_POST_WAIT_STOP
,
2523 /* Called after we've attached to a process and we've seen it stop for
2524 the first time. Resume, stop, or don't touch the threads according
2528 attach_post_wait (int from_tty
, enum attach_post_wait_mode mode
)
2530 struct inferior
*inferior
;
2532 inferior
= current_inferior ();
2533 inferior
->control
.stop_soon
= NO_STOP_QUIETLY
;
2535 if (inferior
->needs_setup
)
2536 setup_inferior (from_tty
);
2538 if (mode
== ATTACH_POST_WAIT_RESUME
)
2540 /* The user requested an `attach&', so be sure to leave threads
2541 that didn't get a signal running. */
2543 /* Immediately resume all suspended threads of this inferior,
2544 and this inferior only. This should have no effect on
2545 already running threads. If a thread has been stopped with a
2546 signal, leave it be. */
2548 proceed_after_attach (inferior
);
2551 if (inferior_thread ()->stop_signal () == GDB_SIGNAL_0
)
2553 clear_proceed_status (0);
2554 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
2558 else if (mode
== ATTACH_POST_WAIT_STOP
)
2560 /* The user requested a plain `attach', so be sure to leave
2561 the inferior stopped. */
2563 /* At least the current thread is already stopped. */
2565 /* In all-stop, by definition, all threads have to be already
2566 stopped at this point. In non-stop, however, although the
2567 selected thread is stopped, others may still be executing.
2568 Be sure to explicitly stop all threads of the process. This
2569 should have no effect on already stopped threads. */
2571 target_stop (ptid_t (inferior
->pid
));
2572 else if (target_is_non_stop_p ())
2574 struct thread_info
*lowest
= inferior_thread ();
2576 stop_all_threads ("attaching");
2578 /* It's not defined which thread will report the attach
2579 stop. For consistency, always select the thread with
2580 lowest GDB number, which should be the main thread, if it
2582 for (thread_info
*thread
: current_inferior ()->non_exited_threads ())
2583 if (thread
->inf
->num
< lowest
->inf
->num
2584 || thread
->per_inf_num
< lowest
->per_inf_num
)
2587 switch_to_thread (lowest
);
2590 /* Tell the user/frontend where we're stopped. */
2592 if (deprecated_attach_hook
)
2593 deprecated_attach_hook ();
2597 /* "attach" command entry point. Takes a program started up outside
2598 of gdb and ``attaches'' to it. This stops it cold in its tracks
2599 and allows us to start debugging it. */
2602 attach_command (const char *args
, int from_tty
)
2605 struct target_ops
*attach_target
;
2606 struct inferior
*inferior
= current_inferior ();
2607 enum attach_post_wait_mode mode
;
2609 dont_repeat (); /* Not for the faint of heart */
2611 scoped_disable_commit_resumed
disable_commit_resumed ("attaching");
2613 if (gdbarch_has_global_solist (target_gdbarch ()))
2614 /* Don't complain if all processes share the same symbol
2617 else if (target_has_execution ())
2619 if (query (_("A program is being debugged already. Kill it? ")))
2622 error (_("Not killed."));
2625 /* Clean up any leftovers from other runs. Some other things from
2626 this function should probably be moved into target_pre_inferior. */
2627 target_pre_inferior (from_tty
);
2629 gdb::unique_xmalloc_ptr
<char> stripped
= strip_bg_char (args
, &async_exec
);
2630 args
= stripped
.get ();
2632 attach_target
= find_attach_target ();
2634 prepare_execution_command (attach_target
, async_exec
);
2636 if (non_stop
&& !attach_target
->supports_non_stop ())
2637 error (_("Cannot attach to this target in non-stop mode"));
2639 attach_target
->attach (args
, from_tty
);
2640 /* to_attach should push the target, so after this point we
2641 shouldn't refer to attach_target again. */
2642 attach_target
= nullptr;
2644 infrun_debug_show_threads ("immediately after attach",
2645 current_inferior ()->non_exited_threads ());
2647 /* Enable async mode if it is supported by the target. */
2648 if (target_can_async_p ())
2649 target_async (true);
2651 /* Set up the "saved terminal modes" of the inferior
2652 based on what modes we are starting it with. */
2653 target_terminal::init ();
2655 /* Install inferior's terminal modes. This may look like a no-op,
2656 as we've just saved them above, however, this does more than
2657 restore terminal settings:
2659 - installs a SIGINT handler that forwards SIGINT to the inferior.
2660 Otherwise a Ctrl-C pressed just while waiting for the initial
2661 stop would end up as a spurious Quit.
2663 - removes stdin from the event loop, which we need if attaching
2664 in the foreground, otherwise on targets that report an initial
2665 stop on attach (which are most) we'd process input/commands
2666 while we're in the event loop waiting for that stop. That is,
2667 before the attach continuation runs and the command is really
2669 target_terminal::inferior ();
2671 /* Set up execution context to know that we should return from
2672 wait_for_inferior as soon as the target reports a stop. */
2673 init_wait_for_inferior ();
2675 inferior
->needs_setup
= true;
2677 if (target_is_non_stop_p ())
2679 /* If we find that the current thread isn't stopped, explicitly
2680 do so now, because we're going to install breakpoints and
2684 /* The user requested an `attach&'; stop just one thread. */
2685 target_stop (inferior_ptid
);
2687 /* The user requested an `attach', so stop all threads of this
2689 target_stop (ptid_t (inferior_ptid
.pid ()));
2692 /* Check for exec file mismatch, and let the user solve it. */
2693 validate_exec_file (from_tty
);
2695 mode
= async_exec
? ATTACH_POST_WAIT_RESUME
: ATTACH_POST_WAIT_STOP
;
2697 /* Some system don't generate traps when attaching to inferior.
2698 E.g. Mach 3 or GNU hurd. */
2699 if (!target_attach_no_wait ())
2701 /* Careful here. See comments in inferior.h. Basically some
2702 OSes don't ignore SIGSTOPs on continue requests anymore. We
2703 need a way for handle_inferior_event to reset the stop_signal
2704 variable after an attach, and this is what
2705 STOP_QUIETLY_NO_SIGSTOP is for. */
2706 inferior
->control
.stop_soon
= STOP_QUIETLY_NO_SIGSTOP
;
2708 /* Wait for stop. */
2709 inferior
->add_continuation ([=] ()
2711 attach_post_wait (from_tty
, mode
);
2714 /* Let infrun consider waiting for events out of this
2716 inferior
->process_target ()->threads_executing
= true;
2718 if (!target_is_async_p ())
2719 mark_infrun_async_event_handler ();
2723 attach_post_wait (from_tty
, mode
);
2725 disable_commit_resumed
.reset_and_commit ();
2728 /* We had just found out that the target was already attached to an
2729 inferior. PTID points at a thread of this new inferior, that is
2730 the most likely to be stopped right now, but not necessarily so.
2731 The new inferior is assumed to be already added to the inferior
2732 list at this point. If LEAVE_RUNNING, then leave the threads of
2733 this inferior running, except those we've explicitly seen reported
2737 notice_new_inferior (thread_info
*thr
, bool leave_running
, int from_tty
)
2739 enum attach_post_wait_mode mode
2740 = leave_running
? ATTACH_POST_WAIT_RESUME
: ATTACH_POST_WAIT_NOTHING
;
2742 gdb::optional
<scoped_restore_current_thread
> restore_thread
;
2744 if (inferior_ptid
!= null_ptid
)
2745 restore_thread
.emplace ();
2747 /* Avoid reading registers -- we haven't fetched the target
2749 switch_to_thread_no_regs (thr
);
2751 /* When we "notice" a new inferior we need to do all the things we
2752 would normally do if we had just attached to it. */
2754 if (thr
->executing ())
2756 struct inferior
*inferior
= current_inferior ();
2758 /* We're going to install breakpoints, and poke at memory,
2759 ensure that the inferior is stopped for a moment while we do
2761 target_stop (inferior_ptid
);
2763 inferior
->control
.stop_soon
= STOP_QUIETLY_REMOTE
;
2765 /* Wait for stop before proceeding. */
2766 inferior
->add_continuation ([=] ()
2768 attach_post_wait (from_tty
, mode
);
2774 attach_post_wait (from_tty
, mode
);
2779 * takes a program previously attached to and detaches it.
2780 * The program resumes execution and will no longer stop
2781 * on signals, etc. We better not have left any breakpoints
2782 * in the program or it'll die when it hits one. For this
2783 * to work, it may be necessary for the process to have been
2784 * previously attached. It *might* work if the program was
2785 * started via the normal ptrace (PTRACE_TRACEME).
2789 detach_command (const char *args
, int from_tty
)
2791 dont_repeat (); /* Not for the faint of heart. */
2793 if (inferior_ptid
== null_ptid
)
2794 error (_("The program is not being run."));
2796 scoped_disable_commit_resumed
disable_commit_resumed ("detaching");
2798 query_if_trace_running (from_tty
);
2800 disconnect_tracing ();
2802 /* Hold a strong reference to the target while (maybe)
2803 detaching the parent. Otherwise detaching could close the
2806 = target_ops_ref::new_reference (current_inferior ()->process_target ());
2808 /* Save this before detaching, since detaching may unpush the
2809 process_stratum target. */
2810 bool was_non_stop_p
= target_is_non_stop_p ();
2812 target_detach (current_inferior (), from_tty
);
2814 /* The current inferior process was just detached successfully. Get
2815 rid of breakpoints that no longer make sense. Note we don't do
2816 this within target_detach because that is also used when
2817 following child forks, and in that case we will want to transfer
2818 breakpoints to the child, not delete them. */
2819 breakpoint_init_inferior (inf_exited
);
2821 /* If the solist is global across inferiors, don't clear it when we
2822 detach from a single inferior. */
2823 if (!gdbarch_has_global_solist (target_gdbarch ()))
2824 no_shared_libraries (nullptr, from_tty
);
2826 if (deprecated_detach_hook
)
2827 deprecated_detach_hook ();
2829 if (!was_non_stop_p
)
2830 restart_after_all_stop_detach (as_process_stratum_target (target_ref
.get ()));
2832 disable_commit_resumed
.reset_and_commit ();
2835 /* Disconnect from the current target without resuming it (leaving it
2836 waiting for a debugger).
2838 We'd better not have left any breakpoints in the program or the
2839 next debugger will get confused. Currently only supported for some
2840 remote targets, since the normal attach mechanisms don't work on
2841 stopped processes on some native platforms (e.g. GNU/Linux). */
2844 disconnect_command (const char *args
, int from_tty
)
2846 dont_repeat (); /* Not for the faint of heart. */
2847 query_if_trace_running (from_tty
);
2848 disconnect_tracing ();
2849 target_disconnect (args
, from_tty
);
2850 no_shared_libraries (nullptr, from_tty
);
2851 init_thread_list ();
2852 if (deprecated_detach_hook
)
2853 deprecated_detach_hook ();
2856 /* Stop PTID in the current target, and tag the PTID threads as having
2857 been explicitly requested to stop. PTID can be a thread, a
2858 process, or minus_one_ptid, meaning all threads of all inferiors of
2859 the current target. */
2862 stop_current_target_threads_ns (ptid_t ptid
)
2866 /* Tag the thread as having been explicitly requested to stop, so
2867 other parts of gdb know not to resume this thread automatically,
2868 if it was stopped due to an internal event. Limit this to
2869 non-stop mode, as when debugging a multi-threaded application in
2870 all-stop mode, we will only get one stop event --- it's undefined
2871 which thread will report the event. */
2872 set_stop_requested (current_inferior ()->process_target (),
2876 /* See inferior.h. */
2879 interrupt_target_1 (bool all_threads
)
2881 scoped_disable_commit_resumed
disable_commit_resumed ("interrupting");
2887 scoped_restore_current_thread restore_thread
;
2889 for (inferior
*inf
: all_inferiors ())
2891 switch_to_inferior_no_thread (inf
);
2892 stop_current_target_threads_ns (minus_one_ptid
);
2896 stop_current_target_threads_ns (inferior_ptid
);
2899 target_interrupt ();
2901 disable_commit_resumed
.reset_and_commit ();
2905 Stop the execution of the target while running in async mode, in
2906 the background. In all-stop, stop the whole process. In non-stop
2907 mode, stop the current thread only by default, or stop all threads
2908 if the `-a' switch is used. */
2911 interrupt_command (const char *args
, int from_tty
)
2913 if (target_can_async_p ())
2915 int all_threads
= 0;
2917 dont_repeat (); /* Not for the faint of heart. */
2920 && startswith (args
, "-a"))
2923 interrupt_target_1 (all_threads
);
2927 /* See inferior.h. */
2930 default_print_float_info (struct gdbarch
*gdbarch
, struct ui_file
*file
,
2931 frame_info_ptr frame
, const char *args
)
2934 int printed_something
= 0;
2936 for (regnum
= 0; regnum
< gdbarch_num_cooked_regs (gdbarch
); regnum
++)
2938 if (gdbarch_register_reggroup_p (gdbarch
, regnum
, float_reggroup
))
2940 printed_something
= 1;
2941 gdbarch_print_registers_info (gdbarch
, file
, frame
, regnum
, 1);
2944 if (!printed_something
)
2945 gdb_printf (file
, "No floating-point info "
2946 "available for this processor.\n");
2950 info_float_command (const char *args
, int from_tty
)
2952 frame_info_ptr frame
;
2954 if (!target_has_registers ())
2955 error (_("The program has no registers now."));
2957 frame
= get_selected_frame (nullptr);
2958 gdbarch_print_float_info (get_frame_arch (frame
), gdb_stdout
, frame
, args
);
2961 /* Implement `info proc' family of commands. */
2964 info_proc_cmd_1 (const char *args
, enum info_proc_what what
, int from_tty
)
2966 struct gdbarch
*gdbarch
= get_current_arch ();
2968 if (!target_info_proc (args
, what
))
2970 if (gdbarch_info_proc_p (gdbarch
))
2971 gdbarch_info_proc (gdbarch
, args
, what
);
2973 error (_("Not supported on this target."));
2977 /* Implement `info proc' when given without any further parameters. */
2980 info_proc_cmd (const char *args
, int from_tty
)
2982 info_proc_cmd_1 (args
, IP_MINIMAL
, from_tty
);
2985 /* Implement `info proc mappings'. */
2988 info_proc_cmd_mappings (const char *args
, int from_tty
)
2990 info_proc_cmd_1 (args
, IP_MAPPINGS
, from_tty
);
2993 /* Implement `info proc stat'. */
2996 info_proc_cmd_stat (const char *args
, int from_tty
)
2998 info_proc_cmd_1 (args
, IP_STAT
, from_tty
);
3001 /* Implement `info proc status'. */
3004 info_proc_cmd_status (const char *args
, int from_tty
)
3006 info_proc_cmd_1 (args
, IP_STATUS
, from_tty
);
3009 /* Implement `info proc cwd'. */
3012 info_proc_cmd_cwd (const char *args
, int from_tty
)
3014 info_proc_cmd_1 (args
, IP_CWD
, from_tty
);
3017 /* Implement `info proc cmdline'. */
3020 info_proc_cmd_cmdline (const char *args
, int from_tty
)
3022 info_proc_cmd_1 (args
, IP_CMDLINE
, from_tty
);
3025 /* Implement `info proc exe'. */
3028 info_proc_cmd_exe (const char *args
, int from_tty
)
3030 info_proc_cmd_1 (args
, IP_EXE
, from_tty
);
3033 /* Implement `info proc files'. */
3036 info_proc_cmd_files (const char *args
, int from_tty
)
3038 info_proc_cmd_1 (args
, IP_FILES
, from_tty
);
3041 /* Implement `info proc all'. */
3044 info_proc_cmd_all (const char *args
, int from_tty
)
3046 info_proc_cmd_1 (args
, IP_ALL
, from_tty
);
3049 /* Implement `show print finish'. */
3052 show_print_finish (struct ui_file
*file
, int from_tty
,
3053 struct cmd_list_element
*c
,
3056 gdb_printf (file
, _("\
3057 Printing of return value after `finish' is %s.\n"),
3062 /* This help string is used for the run, start, and starti commands.
3063 It is defined as a macro to prevent duplication. */
3065 #define RUN_ARGS_HELP \
3066 "You may specify arguments to give it.\n\
3067 Args may include \"*\", or \"[...]\"; they are expanded using the\n\
3068 shell that will start the program (specified by the \"$SHELL\" environment\n\
3069 variable). Input and output redirection with \">\", \"<\", or \">>\"\n\
3070 are also allowed.\n\
3072 With no arguments, uses arguments last specified (with \"run\" or \n\
3073 \"set args\"). To cancel previous arguments and run with no arguments,\n\
3074 use \"set args\" without arguments.\n\
3076 To start the inferior without using a shell, use \"set startup-with-shell off\"."
3078 void _initialize_infcmd ();
3080 _initialize_infcmd ()
3082 static struct cmd_list_element
*info_proc_cmdlist
;
3083 struct cmd_list_element
*c
= nullptr;
3084 const char *cmd_name
;
3086 /* Add the filename of the terminal connected to inferior I/O. */
3087 add_setshow_optional_filename_cmd ("inferior-tty", class_run
,
3088 &inferior_io_terminal_scratch
, _("\
3089 Set terminal for future runs of program being debugged."), _("\
3090 Show terminal for future runs of program being debugged."), _("\
3091 Usage: set inferior-tty [TTY]\n\n\
3092 If TTY is omitted, the default behavior of using the same terminal as GDB\n\
3094 set_inferior_tty_command
,
3095 show_inferior_tty_command
,
3096 &setlist
, &showlist
);
3097 cmd_name
= "inferior-tty";
3098 c
= lookup_cmd (&cmd_name
, setlist
, "", nullptr, -1, 1);
3099 gdb_assert (c
!= nullptr);
3100 add_alias_cmd ("tty", c
, class_run
, 0, &cmdlist
);
3103 add_setshow_string_noescape_cmd (cmd_name
, class_run
,
3104 &inferior_args_scratch
, _("\
3105 Set argument list to give program being debugged when it is started."), _("\
3106 Show argument list to give program being debugged when it is started."), _("\
3107 Follow this command with any number of args, to be passed to the program."),
3110 &setlist
, &showlist
);
3111 c
= lookup_cmd (&cmd_name
, setlist
, "", nullptr, -1, 1);
3112 gdb_assert (c
!= nullptr);
3113 set_cmd_completer (c
, filename_completer
);
3116 add_setshow_string_noescape_cmd (cmd_name
, class_run
,
3117 &inferior_cwd_scratch
, _("\
3118 Set the current working directory to be used when the inferior is started.\n\
3119 Changing this setting does not have any effect on inferiors that are\n\
3122 Show the current working directory that is used when the inferior is started."),
3124 Use this command to change the current working directory that will be used\n\
3125 when the inferior is started. This setting does not affect GDB's current\n\
3126 working directory."),
3129 &setlist
, &showlist
);
3130 c
= lookup_cmd (&cmd_name
, setlist
, "", nullptr, -1, 1);
3131 gdb_assert (c
!= nullptr);
3132 set_cmd_completer (c
, filename_completer
);
3134 c
= add_cmd ("environment", no_class
, environment_info
, _("\
3135 The environment to give the program, or one variable's value.\n\
3136 With an argument VAR, prints the value of environment variable VAR to\n\
3137 give the program being debugged. With no arguments, prints the entire\n\
3138 environment to be given to the program."), &showlist
);
3139 set_cmd_completer (c
, noop_completer
);
3141 add_basic_prefix_cmd ("unset", no_class
,
3142 _("Complement to certain \"set\" commands."),
3143 &unsetlist
, 0, &cmdlist
);
3145 c
= add_cmd ("environment", class_run
, unset_environment_command
, _("\
3146 Cancel environment variable VAR for the program.\n\
3147 This does not affect the program until the next \"run\" command."),
3149 set_cmd_completer (c
, noop_completer
);
3151 c
= add_cmd ("environment", class_run
, set_environment_command
, _("\
3152 Set environment variable value to give the program.\n\
3153 Arguments are VAR VALUE where VAR is variable name and VALUE is value.\n\
3154 VALUES of environment variables are uninterpreted strings.\n\
3155 This does not affect the program until the next \"run\" command."),
3157 set_cmd_completer (c
, noop_completer
);
3159 c
= add_com ("path", class_files
, path_command
, _("\
3160 Add directory DIR(s) to beginning of search path for object files.\n\
3161 $cwd in the path means the current working directory.\n\
3162 This path is equivalent to the $PATH shell variable. It is a list of\n\
3163 directories, separated by colons. These directories are searched to find\n\
3164 fully linked executable files and separately compiled object files as \
3166 set_cmd_completer (c
, filename_completer
);
3168 c
= add_cmd ("paths", no_class
, path_info
, _("\
3169 Current search path for finding object files.\n\
3170 $cwd in the path means the current working directory.\n\
3171 This path is equivalent to the $PATH shell variable. It is a list of\n\
3172 directories, separated by colons. These directories are searched to find\n\
3173 fully linked executable files and separately compiled object files as \
3176 set_cmd_completer (c
, noop_completer
);
3178 add_prefix_cmd ("kill", class_run
, kill_command
,
3179 _("Kill execution of program being debugged."),
3180 &killlist
, 0, &cmdlist
);
3182 add_com ("attach", class_run
, attach_command
, _("\
3183 Attach to a process or file outside of GDB.\n\
3184 This command attaches to another target, of the same type as your last\n\
3185 \"target\" command (\"info files\" will show your target stack).\n\
3186 The command may take as argument a process id or a device file.\n\
3187 For a process id, you must have permission to send the process a signal,\n\
3188 and it must have the same effective uid as the debugger.\n\
3189 When using \"attach\" with a process id, the debugger finds the\n\
3190 program running in the process, looking first in the current working\n\
3191 directory, or (if not found there) using the source file search path\n\
3192 (see the \"directory\" command). You can also use the \"file\" command\n\
3193 to specify the program, and to load its symbol table."));
3195 add_prefix_cmd ("detach", class_run
, detach_command
, _("\
3196 Detach a process or file previously attached.\n\
3197 If a process, it is no longer traced, and it continues its execution. If\n\
3198 you were debugging a file, the file is closed and gdb no longer accesses it."),
3199 &detachlist
, 0, &cmdlist
);
3201 add_com ("disconnect", class_run
, disconnect_command
, _("\
3202 Disconnect from a target.\n\
3203 The target will wait for another debugger to connect. Not available for\n\
3206 c
= add_com ("signal", class_run
, signal_command
, _("\
3207 Continue program with the specified signal.\n\
3208 Usage: signal SIGNAL\n\
3209 The SIGNAL argument is processed the same as the handle command.\n\
3211 An argument of \"0\" means continue the program without sending it a signal.\n\
3212 This is useful in cases where the program stopped because of a signal,\n\
3213 and you want to resume the program while discarding the signal.\n\
3215 In a multi-threaded program the signal is delivered to, or discarded from,\n\
3216 the current thread only."));
3217 set_cmd_completer (c
, signal_completer
);
3219 c
= add_com ("queue-signal", class_run
, queue_signal_command
, _("\
3220 Queue a signal to be delivered to the current thread when it is resumed.\n\
3221 Usage: queue-signal SIGNAL\n\
3222 The SIGNAL argument is processed the same as the handle command.\n\
3223 It is an error if the handling state of SIGNAL is \"nopass\".\n\
3225 An argument of \"0\" means remove any currently queued signal from\n\
3226 the current thread. This is useful in cases where the program stopped\n\
3227 because of a signal, and you want to resume it while discarding the signal.\n\
3229 In a multi-threaded program the signal is queued with, or discarded from,\n\
3230 the current thread only."));
3231 set_cmd_completer (c
, signal_completer
);
3233 cmd_list_element
*stepi_cmd
3234 = add_com ("stepi", class_run
, stepi_command
, _("\
3235 Step one instruction exactly.\n\
3237 Argument N means step N times (or till program stops for another \
3239 add_com_alias ("si", stepi_cmd
, class_run
, 0);
3241 cmd_list_element
*nexti_cmd
3242 = add_com ("nexti", class_run
, nexti_command
, _("\
3243 Step one instruction, but proceed through subroutine calls.\n\
3245 Argument N means step N times (or till program stops for another \
3247 add_com_alias ("ni", nexti_cmd
, class_run
, 0);
3249 cmd_list_element
*finish_cmd
3250 = add_com ("finish", class_run
, finish_command
, _("\
3251 Execute until selected stack frame returns.\n\
3253 Upon return, the value returned is printed and put in the value history."));
3254 add_com_alias ("fin", finish_cmd
, class_run
, 1);
3256 cmd_list_element
*next_cmd
3257 = add_com ("next", class_run
, next_command
, _("\
3258 Step program, proceeding through subroutine calls.\n\
3260 Unlike \"step\", if the current source line calls a subroutine,\n\
3261 this command does not enter the subroutine, but instead steps over\n\
3262 the call, in effect treating it as a single source line."));
3263 add_com_alias ("n", next_cmd
, class_run
, 1);
3265 cmd_list_element
*step_cmd
3266 = add_com ("step", class_run
, step_command
, _("\
3267 Step program until it reaches a different source line.\n\
3269 Argument N means step N times (or till program stops for another \
3271 add_com_alias ("s", step_cmd
, class_run
, 1);
3273 cmd_list_element
*until_cmd
3274 = add_com ("until", class_run
, until_command
, _("\
3275 Execute until past the current line or past a LOCATION.\n\
3276 Execute until the program reaches a source line greater than the current\n\
3277 or a specified location (same args as break command) within the current \
3279 set_cmd_completer (until_cmd
, location_completer
);
3280 add_com_alias ("u", until_cmd
, class_run
, 1);
3282 c
= add_com ("advance", class_run
, advance_command
, _("\
3283 Continue the program up to the given location (same form as args for break \
3285 Execution will also stop upon exit from the current stack frame."));
3286 set_cmd_completer (c
, location_completer
);
3288 cmd_list_element
*jump_cmd
3289 = add_com ("jump", class_run
, jump_command
, _("\
3290 Continue program being debugged at specified line or address.\n\
3291 Usage: jump LOCATION\n\
3292 Give as argument either LINENUM or *ADDR, where ADDR is an expression\n\
3293 for an address to start at."));
3294 set_cmd_completer (jump_cmd
, location_completer
);
3295 add_com_alias ("j", jump_cmd
, class_run
, 1);
3297 cmd_list_element
*continue_cmd
3298 = add_com ("continue", class_run
, continue_command
, _("\
3299 Continue program being debugged, after signal or breakpoint.\n\
3300 Usage: continue [N]\n\
3301 If proceeding from breakpoint, a number N may be used as an argument,\n\
3302 which means to set the ignore count of that breakpoint to N - 1 (so that\n\
3303 the breakpoint won't break until the Nth time it is reached).\n\
3305 If non-stop mode is enabled, continue only the current thread,\n\
3306 otherwise all the threads in the program are continued. To \n\
3307 continue all stopped threads in non-stop mode, use the -a option.\n\
3308 Specifying -a and an ignore count simultaneously is an error."));
3309 add_com_alias ("c", continue_cmd
, class_run
, 1);
3310 add_com_alias ("fg", continue_cmd
, class_run
, 1);
3312 cmd_list_element
*run_cmd
3313 = add_com ("run", class_run
, run_command
, _("\
3314 Start debugged program.\n"
3316 set_cmd_completer (run_cmd
, filename_completer
);
3317 add_com_alias ("r", run_cmd
, class_run
, 1);
3319 c
= add_com ("start", class_run
, start_command
, _("\
3320 Start the debugged program stopping at the beginning of the main procedure.\n"
3322 set_cmd_completer (c
, filename_completer
);
3324 c
= add_com ("starti", class_run
, starti_command
, _("\
3325 Start the debugged program stopping at the first instruction.\n"
3327 set_cmd_completer (c
, filename_completer
);
3329 add_com ("interrupt", class_run
, interrupt_command
,
3330 _("Interrupt the execution of the debugged program.\n\
3331 If non-stop mode is enabled, interrupt only the current thread,\n\
3332 otherwise all the threads in the program are stopped. To \n\
3333 interrupt all running threads in non-stop mode, use the -a option."));
3335 cmd_list_element
*info_registers_cmd
3336 = add_info ("registers", info_registers_command
, _("\
3337 List of integer registers and their contents, for selected stack frame.\n\
3338 One or more register names as argument means describe the given registers.\n\
3339 One or more register group names as argument means describe the registers\n\
3340 in the named register groups."));
3341 add_info_alias ("r", info_registers_cmd
, 1);
3342 set_cmd_completer (info_registers_cmd
, reg_or_group_completer
);
3344 c
= add_info ("all-registers", info_all_registers_command
, _("\
3345 List of all registers and their contents, for selected stack frame.\n\
3346 One or more register names as argument means describe the given registers.\n\
3347 One or more register group names as argument means describe the registers\n\
3348 in the named register groups."));
3349 set_cmd_completer (c
, reg_or_group_completer
);
3351 add_info ("program", info_program_command
,
3352 _("Execution status of the program."));
3354 add_info ("float", info_float_command
,
3355 _("Print the status of the floating point unit."));
3357 add_info ("vector", info_vector_command
,
3358 _("Print the status of the vector unit."));
3360 add_prefix_cmd ("proc", class_info
, info_proc_cmd
,
3362 Show additional information about a process.\n\
3363 Specify any process id, or use the program being debugged by default."),
3365 1/*allow-unknown*/, &infolist
);
3367 add_cmd ("mappings", class_info
, info_proc_cmd_mappings
, _("\
3368 List memory regions mapped by the specified process."),
3369 &info_proc_cmdlist
);
3371 add_cmd ("stat", class_info
, info_proc_cmd_stat
, _("\
3372 List process info from /proc/PID/stat."),
3373 &info_proc_cmdlist
);
3375 add_cmd ("status", class_info
, info_proc_cmd_status
, _("\
3376 List process info from /proc/PID/status."),
3377 &info_proc_cmdlist
);
3379 add_cmd ("cwd", class_info
, info_proc_cmd_cwd
, _("\
3380 List current working directory of the specified process."),
3381 &info_proc_cmdlist
);
3383 add_cmd ("cmdline", class_info
, info_proc_cmd_cmdline
, _("\
3384 List command line arguments of the specified process."),
3385 &info_proc_cmdlist
);
3387 add_cmd ("exe", class_info
, info_proc_cmd_exe
, _("\
3388 List absolute filename for executable of the specified process."),
3389 &info_proc_cmdlist
);
3391 add_cmd ("files", class_info
, info_proc_cmd_files
, _("\
3392 List files opened by the specified process."),
3393 &info_proc_cmdlist
);
3395 add_cmd ("all", class_info
, info_proc_cmd_all
, _("\
3396 List all available info about the specified process."),
3397 &info_proc_cmdlist
);
3399 add_setshow_boolean_cmd ("finish", class_support
,
3401 Set whether `finish' prints the return value."), _("\
3402 Show whether `finish' prints the return value."), nullptr,
3405 &setprintlist
, &showprintlist
);