1 /* Memory-access and commands for "inferior" process, for GDB.
3 Copyright (C) 1986-2025 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/>. */
20 #include "arch-utils.h"
21 #include "exceptions.h"
27 #include "gdbsupport/environ.h"
29 #include "cli/cli-cmds.h"
30 #include "cli/cli-style.h"
36 #include "completer.h"
39 #include "reggroups.h"
43 #include "observable.h"
44 #include "target-descriptions.h"
45 #include "user-regs.h"
46 #include "gdbthread.h"
48 #include "inline-frame.h"
49 #include "tracepoint.h"
52 #include "thread-fsm.h"
58 #include "cli/cli-style.h"
60 /* Local functions: */
62 static void until_next_command (int);
64 static void step_1 (int, int, const char *);
66 #define ERROR_NO_INFERIOR \
67 if (!target_has_execution ()) error (_("The program is not being run."));
69 /* Pid of our debugged inferior, or 0 if no inferior now.
70 Since various parts of infrun.c test this to see whether there is a program
71 being debugged it should be nonzero (currently 3 is used) for remote
76 /* Nonzero if stopped due to completion of a stack dummy routine. */
78 enum stop_stack_kind stop_stack_dummy
;
80 /* Nonzero if stopped due to a random (unexpected) signal in inferior
83 int stopped_by_random_signal
;
86 /* Whether "finish" should print the value. */
88 static bool finish_print
= true;
92 /* Store the new value passed to 'set inferior-tty'. */
95 set_tty_value (const std::string
&tty
)
97 current_inferior ()->set_tty (tty
);
100 /* Get the current 'inferior-tty' value. */
102 static const std::string
&
105 return current_inferior ()->tty ();
108 /* Implement 'show inferior-tty' command. */
111 show_inferior_tty_command (struct ui_file
*file
, int from_tty
,
112 struct cmd_list_element
*c
, const char *value
)
114 /* Note that we ignore the passed-in value in favor of computing it
116 const std::string
&inferior_tty
= current_inferior ()->tty ();
119 _("Terminal for future runs of program being debugged "
120 "is \"%s\".\n"), inferior_tty
.c_str ());
123 /* Store the new value passed to 'set args'. */
126 set_args_value (const std::string
&args
)
128 current_inferior ()->set_args (args
);
131 /* Return the value for 'show args' to display. */
133 static const std::string
&
136 return current_inferior ()->args ();
139 /* Callback to implement 'show args' command. */
142 show_args_command (struct ui_file
*file
, int from_tty
,
143 struct cmd_list_element
*c
, const char *value
)
145 /* Ignore the passed in value, pull the argument directly from the
146 inferior. However, these should always be the same. */
147 gdb_printf (file
, _("\
148 Argument list to give program being debugged when it is started is \"%s\".\n"),
149 current_inferior ()->args ().c_str ());
152 /* See gdbsupport/common-inferior.h. */
157 return current_inferior ()->cwd ();
160 /* Store the new value passed to 'set cwd'. */
163 set_cwd_value (const std::string
&args
)
165 current_inferior ()->set_cwd (args
);
168 /* Handle the 'show cwd' command. */
171 show_cwd_command (struct ui_file
*file
, int from_tty
,
172 struct cmd_list_element
*c
, const char *value
)
174 const std::string
&cwd
= current_inferior ()->cwd ();
179 You have not set the inferior's current working directory.\n\
180 The inferior will inherit GDB's cwd if native debugging, or the remote\n\
181 server's cwd if remote debugging.\n"));
184 _("Current working directory that will be used "
185 "when starting the inferior is \"%s\".\n"),
190 /* This function strips the '&' character (indicating background
191 execution) that is added as *the last* of the arguments ARGS of a
192 command. A copy of the incoming ARGS without the '&' is returned,
193 unless the resulting string after stripping is empty, in which case
194 NULL is returned. *BG_CHAR_P is an output boolean that indicates
195 whether the '&' character was found. */
197 static gdb::unique_xmalloc_ptr
<char>
198 strip_bg_char (const char *args
, int *bg_char_p
)
202 if (args
== nullptr || *args
== '\0')
208 p
= args
+ strlen (args
);
212 while (p
> args
&& isspace (p
[-1]))
217 return gdb::unique_xmalloc_ptr
<char>
218 (savestring (args
, p
- args
));
220 return gdb::unique_xmalloc_ptr
<char> (nullptr);
224 return make_unique_xstrdup (args
);
227 /* See inferior.h. */
230 post_create_inferior (int from_tty
, bool set_pspace_solib_ops
)
232 /* Be sure we own the terminal in case write operations are performed. */
233 target_terminal::ours_for_output ();
235 infrun_debug_show_threads ("threads in the newly created inferior",
236 current_inferior ()->non_exited_threads ());
238 /* If the target hasn't taken care of this already, do it now.
239 Targets which need to access registers during to_open,
240 to_create_inferior, or to_attach should do it earlier; but many
242 target_find_description ();
244 /* Now that we know the register layout, retrieve current PC. But
245 if the PC is unavailable (e.g., we're opening a core file with
246 missing registers info), ignore it. */
247 thread_info
*thr
= inferior_thread ();
249 thr
->clear_stop_pc ();
252 regcache
*rc
= get_thread_regcache (thr
);
253 thr
->set_stop_pc (regcache_read_pc (rc
));
255 catch (const gdb_exception_error
&ex
)
257 if (ex
.error
!= NOT_AVAILABLE_ERROR
)
261 if (set_pspace_solib_ops
)
262 current_program_space
->set_solib_ops
263 (gdbarch_make_solib_ops (current_inferior ()->arch ()));
265 if (current_program_space
->exec_bfd ())
267 const unsigned solib_add_generation
268 = current_program_space
->solib_add_generation
;
270 scoped_restore restore_in_initial_library_scan
271 = make_scoped_restore (¤t_inferior ()->in_initial_library_scan
,
274 /* Create the hooks to handle shared library load and unload
276 solib_create_inferior_hook (from_tty
);
278 if (current_program_space
->solib_add_generation
== solib_add_generation
)
280 /* The platform-specific hook should load initial shared libraries,
281 but didn't. FROM_TTY will be incorrectly 0 but such solib
282 targets should be fixed anyway. Call it only after the solib
283 target has been initialized by solib_create_inferior_hook. */
286 warning (_("platform-specific solib_create_inferior_hook did "
287 "not load initial shared libraries."));
289 /* If the solist is global across processes, there's no need to
291 if (!gdbarch_has_global_solist (current_inferior ()->arch ()))
292 solib_add (nullptr, 0, auto_solib_add
);
296 /* If the user sets watchpoints before execution having started,
297 then she gets software watchpoints, because GDB can't know which
298 target will end up being pushed, or if it supports hardware
299 watchpoints or not. breakpoint_re_set takes care of promoting
300 watchpoints to hardware watchpoints if possible, however, if this
301 new inferior doesn't load shared libraries or we don't pull in
302 symbols from any other source on this target/arch,
303 breakpoint_re_set is never called. Call it now so that software
304 watchpoints get a chance to be promoted to hardware watchpoints
305 if the now pushed target supports hardware watchpoints. */
306 breakpoint_re_set ();
308 gdb::observers::inferior_created
.notify (current_inferior ());
311 /* Kill the inferior if already running. This function is designed
312 to be called when we are about to start the execution of the program
313 from the beginning. Ask the user to confirm that he wants to restart
314 the program being debugged when FROM_TTY is non-null. */
317 kill_if_already_running (int from_tty
)
319 if (inferior_ptid
!= null_ptid
&& target_has_execution ())
321 /* Bail out before killing the program if we will not be able to
323 target_require_runnable ();
326 && !query (_("The program being debugged has been started already.\n\
327 Start it from the beginning? ")))
328 error (_("Program not restarted."));
333 /* See inferior.h. */
336 prepare_execution_command (struct target_ops
*target
, int background
)
338 /* If we get a request for running in the bg but the target
339 doesn't support it, error out. */
340 if (background
&& !target_can_async_p (target
))
341 error (_("Asynchronous execution not supported on this target."));
345 /* If we get a request for running in the fg, then we need to
346 simulate synchronous (fg) execution. Note no cleanup is
347 necessary for this. stdin is re-enabled whenever an error
348 reaches the top level. */
349 all_uis_on_sync_execution_starting ();
353 /* Determine how the new inferior will behave. */
357 /* Run program without any explicit stop during startup. */
360 /* Stop at the beginning of the program's main function. */
363 /* Stop at the first instruction of the program. */
364 RUN_STOP_AT_FIRST_INSN
367 /* Implement the "run" command. Force a stop during program start if
368 requested by RUN_HOW. */
371 run_command_1 (const char *args
, int from_tty
, enum run_how run_how
)
373 struct ui_out
*uiout
= current_uiout
;
374 struct target_ops
*run_target
;
379 scoped_disable_commit_resumed
disable_commit_resumed ("running");
381 kill_if_already_running (from_tty
);
383 init_wait_for_inferior ();
384 clear_breakpoint_hit_counts ();
386 /* Clean up any leftovers from other runs. Some other things from
387 this function should probably be moved into target_pre_inferior. */
388 target_pre_inferior ();
390 /* The comment here used to read, "The exec file is re-read every
391 time we do a generic_mourn_inferior, so we just have to worry
392 about the symbol file." The `generic_mourn_inferior' function
393 gets called whenever the program exits. However, suppose the
394 program exits, and *then* the executable file changes? We need
395 to check again here. Since reopen_exec_file doesn't do anything
396 if the timestamp hasn't changed, I don't see the harm. */
398 reread_symbols (from_tty
);
400 gdb::unique_xmalloc_ptr
<char> stripped
= strip_bg_char (args
, &async_exec
);
401 args
= stripped
.get ();
403 /* Do validation and preparation before possibly changing anything
406 run_target
= find_run_target ();
408 prepare_execution_command (run_target
, async_exec
);
410 if (non_stop
&& !run_target
->supports_non_stop ())
411 error (_("The target does not support running in non-stop mode."));
413 /* Done. Can now set breakpoints, change inferior args, etc. */
415 /* Insert temporary breakpoint in main function if requested. */
416 if (run_how
== RUN_STOP_AT_MAIN
)
418 /* To avoid other inferiors hitting this breakpoint, make it
419 inferior-specific. */
420 std::string arg
= string_printf ("-qualified %s inferior %d",
422 current_inferior ()->num
);
423 tbreak_command (arg
.c_str (), 0);
426 const char *exec_file
= current_program_space
->exec_filename ();
428 /* We keep symbols from add-symbol-file, on the grounds that the
429 user might want to add some symbols before running the program
430 (right?). But sometimes (dynamic loading where the user manually
431 introduces the new symbols with add-symbol-file), the code which
432 the symbols describe does not persist between runs. Currently
433 the user has to manually nuke all symbols between runs if they
434 want them to go away (PR 2207). This is probably reasonable. */
436 /* If there were other args, beside '&', process them. */
438 current_inferior ()->set_args (args
);
442 uiout
->field_string (nullptr, "Starting program");
445 uiout
->field_string ("execfile", exec_file
,
446 file_name_style
.style ());
448 uiout
->field_string ("infargs", current_inferior ()->args ());
453 run_target
->create_inferior (exec_file
,
454 current_inferior ()->args (),
455 current_inferior ()->environment
.envp (),
457 /* to_create_inferior should push the target, so after this point we
458 shouldn't refer to run_target again. */
459 run_target
= nullptr;
461 infrun_debug_show_threads ("immediately after create_process",
462 current_inferior ()->non_exited_threads ());
464 /* We're starting off a new process. When we get out of here, in
465 non-stop mode, finish the state of all threads of that process,
466 but leave other threads alone, as they may be stopped in internal
467 events --- the frontend shouldn't see them as stopped. In
468 all-stop, always finish the state of all threads, as we may be
469 resuming more than just the new process. */
470 process_stratum_target
*finish_target
;
474 finish_target
= current_inferior ()->process_target ();
475 finish_ptid
= ptid_t (current_inferior ()->pid
);
479 finish_target
= nullptr;
480 finish_ptid
= minus_one_ptid
;
482 scoped_finish_thread_state
finish_state (finish_target
, finish_ptid
);
484 /* Pass zero for FROM_TTY, because at this point the "run" command
485 has done its thing; now we are setting up the running program. */
486 post_create_inferior (0, true);
488 /* Queue a pending event so that the program stops immediately. */
489 if (run_how
== RUN_STOP_AT_FIRST_INSN
)
491 thread_info
*thr
= inferior_thread ();
492 target_waitstatus ws
;
493 ws
.set_stopped (GDB_SIGNAL_0
);
494 thr
->set_pending_waitstatus (ws
);
497 /* Start the target running. Do not use -1 continuation as it would skip
498 breakpoint right at the entry point. */
499 proceed (regcache_read_pc (get_thread_regcache (inferior_thread ())),
502 /* Since there was no error, there's no need to finish the thread
504 finish_state
.release ();
506 disable_commit_resumed
.reset_and_commit ();
510 run_command (const char *args
, int from_tty
)
512 run_command_1 (args
, from_tty
, RUN_NORMAL
);
515 /* Start the execution of the program up until the beginning of the main
519 start_command (const char *args
, int from_tty
)
521 /* Run the program until reaching the main procedure... */
522 run_command_1 (args
, from_tty
, RUN_STOP_AT_MAIN
);
525 /* Start the execution of the program stopping at the first
529 starti_command (const char *args
, int from_tty
)
531 run_command_1 (args
, from_tty
, RUN_STOP_AT_FIRST_INSN
);
535 proceed_thread_callback (struct thread_info
*thread
)
537 /* We go through all threads individually instead of compressing
538 into a single target `resume_all' request, because some threads
539 may be stopped in internal breakpoints/events, or stopped waiting
540 for its turn in the displaced stepping queue (that is, they are
541 running && !executing). The target side has no idea about why
542 the thread is stopped, so a `resume_all' command would resume too
543 much. If/when GDB gains a way to tell the target `hold this
544 thread stopped until I say otherwise', then we can optimize
546 if (thread
->state
!= THREAD_STOPPED
)
549 if (!thread
->inf
->has_execution ())
552 switch_to_thread (thread
);
553 clear_proceed_status (0);
554 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
559 ensure_valid_thread (void)
561 if (inferior_ptid
== null_ptid
562 || inferior_thread ()->state
== THREAD_EXITED
)
563 error (_("Cannot execute this command without a live selected thread."));
566 /* If the user is looking at trace frames, any resumption of execution
567 is likely to mix up recorded and live target data. So simply
568 disallow those commands. */
571 ensure_not_tfind_mode (void)
573 if (get_traceframe_number () >= 0)
574 error (_("Cannot execute this command while looking at trace frames."));
577 /* Throw an error indicating the current thread is running. */
580 error_is_running (void)
582 error (_("Cannot execute this command while "
583 "the selected thread is running."));
586 /* Calls error_is_running if the current thread is running. */
589 ensure_not_running (void)
591 if (inferior_thread ()->state
== THREAD_RUNNING
)
596 continue_1 (int all_threads
)
599 ensure_not_tfind_mode ();
601 if (non_stop
&& all_threads
)
603 /* Don't error out if the current thread is running, because
604 there may be other stopped threads. */
606 /* Backup current thread and selected frame and restore on scope
608 scoped_restore_current_thread restore_thread
;
609 scoped_disable_commit_resumed disable_commit_resumed
610 ("continue all threads in non-stop");
612 iterate_over_threads (proceed_thread_callback
);
614 if (current_ui
->prompt_state
== PROMPT_BLOCKED
)
616 /* If all threads in the target were already running,
617 proceed_thread_callback ends up never calling proceed,
618 and so nothing calls this to put the inferior's terminal
619 settings in effect and remove stdin from the event loop,
620 which we must when running a foreground command. E.g.:
624 <all threads are running now>
627 <no thread was resumed, but the inferior now owns the terminal>
629 target_terminal::inferior ();
632 disable_commit_resumed
.reset_and_commit ();
636 ensure_valid_thread ();
637 ensure_not_running ();
638 clear_proceed_status (0);
639 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
643 /* continue [-a] [proceed-count] [&] */
646 continue_command (const char *args
, int from_tty
)
649 bool all_threads_p
= false;
653 /* Find out whether we must run in the background. */
654 gdb::unique_xmalloc_ptr
<char> stripped
= strip_bg_char (args
, &async_exec
);
655 args
= stripped
.get ();
659 if (startswith (args
, "-a"))
661 all_threads_p
= true;
662 args
+= sizeof ("-a") - 1;
668 if (!non_stop
&& all_threads_p
)
669 error (_("`-a' is meaningless in all-stop mode."));
671 if (args
!= nullptr && all_threads_p
)
672 error (_("Can't resume all threads and specify "
673 "proceed count simultaneously."));
675 /* If we have an argument left, set proceed count of breakpoint we
679 bpstat
*bs
= nullptr;
682 struct thread_info
*tp
;
685 tp
= inferior_thread ();
688 process_stratum_target
*last_target
;
691 get_last_target_status (&last_target
, &last_ptid
, nullptr);
692 tp
= last_target
->find_thread (last_ptid
);
695 bs
= tp
->control
.stop_bpstat
;
697 while ((stat
= bpstat_num (&bs
, &num
)) != 0)
700 set_ignore_count (num
,
701 parse_and_eval_long (args
) - 1,
703 /* set_ignore_count prints a message ending with a period.
704 So print two spaces before "Continuing.". */
710 if (!stopped
&& from_tty
)
713 ("Not stopped at any breakpoint; argument ignored.\n");
717 ensure_not_tfind_mode ();
719 if (!non_stop
|| !all_threads_p
)
721 ensure_valid_thread ();
722 ensure_not_running ();
725 prepare_execution_command (current_inferior ()->top_target (), async_exec
);
728 gdb_printf (_("Continuing.\n"));
730 continue_1 (all_threads_p
);
733 /* Record in TP the starting point of a "step" or "next" command. */
736 set_step_frame (thread_info
*tp
)
738 /* This can be removed once this function no longer implicitly relies on the
739 inferior_ptid value. */
740 gdb_assert (inferior_ptid
== tp
->ptid
);
742 frame_info_ptr frame
= get_current_frame ();
744 symtab_and_line sal
= find_frame_sal (frame
);
745 set_step_info (tp
, frame
, sal
);
747 CORE_ADDR pc
= get_frame_pc (frame
);
748 tp
->control
.step_start_function
= find_pc_function (pc
);
751 /* Step until outside of current statement. */
754 step_command (const char *count_string
, int from_tty
)
756 step_1 (0, 0, count_string
);
759 /* Likewise, but skip over subroutine calls as if single instructions. */
762 next_command (const char *count_string
, int from_tty
)
764 step_1 (1, 0, count_string
);
767 /* Likewise, but step only one instruction. */
770 stepi_command (const char *count_string
, int from_tty
)
772 step_1 (0, 1, count_string
);
776 nexti_command (const char *count_string
, int from_tty
)
778 step_1 (1, 1, count_string
);
781 /* Data for the FSM that manages the step/next/stepi/nexti
784 struct step_command_fsm
: public thread_fsm
786 /* How many steps left in a "step N"-like command. */
789 /* If true, this is a next/nexti, otherwise a step/stepi. */
790 int skip_subroutines
;
792 /* If true, this is a stepi/nexti, otherwise a step/step. */
795 explicit step_command_fsm (struct interp
*cmd_interp
)
796 : thread_fsm (cmd_interp
)
800 void clean_up (struct thread_info
*thread
) override
;
801 bool should_stop (struct thread_info
*thread
) override
;
802 enum async_reply_reason
do_async_reply_reason () override
;
805 /* Prepare for a step/next/etc. command. Any target resource
806 allocated here is undone in the FSM's clean_up method. */
809 step_command_fsm_prepare (struct step_command_fsm
*sm
,
810 int skip_subroutines
, int single_inst
,
811 int count
, struct thread_info
*thread
)
813 sm
->skip_subroutines
= skip_subroutines
;
814 sm
->single_inst
= single_inst
;
817 /* Leave the si command alone. */
818 if (!sm
->single_inst
|| sm
->skip_subroutines
)
819 set_longjmp_breakpoint (thread
, get_frame_id (get_current_frame ()));
821 thread
->control
.stepping_command
= 1;
824 static int prepare_one_step (thread_info
*, struct step_command_fsm
*sm
);
827 step_1 (int skip_subroutines
, int single_inst
, const char *count_string
)
831 struct thread_info
*thr
;
832 struct step_command_fsm
*step_sm
;
835 ensure_not_tfind_mode ();
836 ensure_valid_thread ();
837 ensure_not_running ();
839 gdb::unique_xmalloc_ptr
<char> stripped
840 = strip_bg_char (count_string
, &async_exec
);
841 count_string
= stripped
.get ();
843 prepare_execution_command (current_inferior ()->top_target (), async_exec
);
845 count
= count_string
? parse_and_eval_long (count_string
) : 1;
847 clear_proceed_status (1);
849 /* Setup the execution command state machine to handle all the COUNT
851 thr
= inferior_thread ();
852 step_sm
= new step_command_fsm (command_interp ());
853 thr
->set_thread_fsm (std::unique_ptr
<thread_fsm
> (step_sm
));
855 step_command_fsm_prepare (step_sm
, skip_subroutines
,
856 single_inst
, count
, thr
);
858 /* Do only one step for now, before returning control to the event
859 loop. Let the continuation figure out how many other steps we
860 need to do, and handle them one at the time, through
862 if (!prepare_one_step (thr
, step_sm
))
863 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
866 /* Stepped into an inline frame. Pretend that we've
868 thr
->thread_fsm ()->clean_up (thr
);
869 bool proceeded
= normal_stop ();
871 inferior_event_handler (INF_EXEC_COMPLETE
);
872 all_uis_check_sync_execution_done ();
876 /* Implementation of the 'should_stop' FSM method for stepping
877 commands. Called after we are done with one step operation, to
878 check whether we need to step again, before we print the prompt and
879 return control to the user. If count is > 1, returns false, as we
880 will need to keep going. */
883 step_command_fsm::should_stop (struct thread_info
*tp
)
885 if (tp
->control
.stop_step
)
887 /* There are more steps to make, and we did stop due to
888 ending a stepping range. Do another step. */
890 return prepare_one_step (tp
, this);
898 /* Implementation of the 'clean_up' FSM method for stepping commands. */
901 step_command_fsm::clean_up (struct thread_info
*thread
)
903 if (!single_inst
|| skip_subroutines
)
904 delete_longjmp_breakpoint (thread
->global_num
);
907 /* Implementation of the 'async_reply_reason' FSM method for stepping
910 enum async_reply_reason
911 step_command_fsm::do_async_reply_reason ()
913 return EXEC_ASYNC_END_STEPPING_RANGE
;
916 /* Prepare for one step in "step N". The actual target resumption is
917 done by the caller. Return true if we're done and should thus
918 report a stop to the user. Returns false if the target needs to be
922 prepare_one_step (thread_info
*tp
, struct step_command_fsm
*sm
)
924 /* This can be removed once this function no longer implicitly relies on the
925 inferior_ptid value. */
926 gdb_assert (inferior_ptid
== tp
->ptid
);
930 frame_info_ptr frame
= get_current_frame ();
934 if (!sm
->single_inst
)
938 /* Step at an inlined function behaves like "down". */
939 if (!sm
->skip_subroutines
940 && inline_skipped_frames (tp
))
943 const char *fn
= nullptr;
947 /* Pretend that we've ran. */
948 resume_ptid
= user_visible_resume_ptid (1);
949 set_running (tp
->inf
->process_target (), resume_ptid
, true);
951 step_into_inline_frame (tp
);
953 frame
= get_current_frame ();
954 sal
= find_frame_sal (frame
);
955 sym
= get_frame_function (frame
);
958 fn
= sym
->print_name ();
961 || !function_name_is_marked_for_skip (fn
, sal
))
964 return prepare_one_step (tp
, sm
);
968 pc
= get_frame_pc (frame
);
969 find_pc_line_pc_range (pc
,
970 &tp
->control
.step_range_start
,
971 &tp
->control
.step_range_end
);
973 if (execution_direction
== EXEC_REVERSE
)
975 symtab_and_line sal
= find_pc_line (pc
, 0);
976 symtab_and_line sal_start
977 = find_pc_line (tp
->control
.step_range_start
, 0);
979 if (sal
.line
== sal_start
.line
)
980 /* Executing in reverse, the step_range_start address is in
981 the same line. We want to stop in the previous line so
982 move step_range_start before the current line. */
983 tp
->control
.step_range_start
--;
986 /* There's a problem in gcc (PR gcc/98780) that causes missing line
987 table entries, which results in a too large stepping range.
988 Use inlined_subroutine info to make the range more narrow. */
989 if (inline_skipped_frames (tp
) > 0)
991 const symbol
*sym
= inline_skipped_symbol (tp
);
992 if (sym
->aclass () == LOC_BLOCK
)
994 const block
*block
= sym
->value_block ();
995 if (block
->end () < tp
->control
.step_range_end
)
996 tp
->control
.step_range_end
= block
->end ();
1000 tp
->control
.may_range_step
= 1;
1002 /* If we have no line info, switch to stepi mode. */
1003 if (tp
->control
.step_range_end
== 0 && step_stop_if_no_debug
)
1005 tp
->control
.step_range_start
= tp
->control
.step_range_end
= 1;
1006 tp
->control
.may_range_step
= 0;
1008 else if (tp
->control
.step_range_end
== 0)
1012 if (find_pc_partial_function (pc
, &name
,
1013 &tp
->control
.step_range_start
,
1014 &tp
->control
.step_range_end
) == 0)
1015 error (_("Cannot find bounds of current function"));
1017 target_terminal::ours_for_output ();
1018 gdb_printf (_("Single stepping until exit from function %s,"
1019 "\nwhich has no line number information.\n"),
1025 /* Say we are stepping, but stop after one insn whatever it does. */
1026 tp
->control
.step_range_start
= tp
->control
.step_range_end
= 1;
1027 if (!sm
->skip_subroutines
)
1029 Don't step over function calls, not even to functions lacking
1031 tp
->control
.step_over_calls
= STEP_OVER_NONE
;
1034 if (sm
->skip_subroutines
)
1035 tp
->control
.step_over_calls
= STEP_OVER_ALL
;
1041 sm
->set_finished ();
1046 /* Continue program at specified address. */
1049 jump_command (const char *arg
, int from_tty
)
1051 struct gdbarch
*gdbarch
= get_current_arch ();
1058 ensure_not_tfind_mode ();
1059 ensure_valid_thread ();
1060 ensure_not_running ();
1062 /* Find out whether we must run in the background. */
1063 gdb::unique_xmalloc_ptr
<char> stripped
= strip_bg_char (arg
, &async_exec
);
1064 arg
= stripped
.get ();
1066 prepare_execution_command (current_inferior ()->top_target (), async_exec
);
1069 error_no_arg (_("starting address"));
1071 std::vector
<symtab_and_line
> sals
1072 = decode_line_with_current_source (arg
, DECODE_LINE_FUNFIRSTLINE
);
1073 if (sals
.size () != 1)
1075 /* If multiple sal-objects were found, try dropping those that aren't
1076 from the current symtab. */
1077 symtab_and_line cursal
1078 = get_current_source_symtab_and_line (current_program_space
);
1079 sals
.erase (std::remove_if (sals
.begin (), sals
.end (),
1080 [&] (const symtab_and_line
&sal
)
1082 return sal
.symtab
!= cursal
.symtab
;
1084 if (sals
.size () != 1)
1085 error (_("Jump request is ambiguous: "
1086 "does not resolve to a single address"));
1089 symtab_and_line
&sal
= sals
[0];
1091 if (sal
.symtab
== 0 && sal
.pc
== 0)
1092 error (_("No source file has been specified."));
1094 resolve_sal_pc (&sal
); /* May error out. */
1096 /* See if we are trying to jump to another function. */
1097 fn
= get_frame_function (get_current_frame ());
1098 sfn
= find_pc_sect_containing_function (sal
.pc
,
1099 find_pc_mapped_section (sal
.pc
));
1100 if (fn
!= nullptr && sfn
!= fn
)
1102 if (!query (_("Line %ps is not in `%s'. Jump anyway? "),
1103 styled_string (line_number_style
.style (),
1104 pulongest (sal
.line
)),
1107 error (_("Not confirmed."));
1114 struct obj_section
*section
;
1116 section
= sfn
->obj_section (sfn
->objfile ());
1117 if (section_is_overlay (section
)
1118 && !section_is_mapped (section
))
1120 if (!query (_("WARNING!!! Destination is in "
1121 "unmapped overlay! Jump anyway? ")))
1123 error (_("Not confirmed."));
1133 gdb_printf (_("Continuing at "));
1134 gdb_puts (paddress (gdbarch
, addr
));
1138 clear_proceed_status (0);
1139 proceed (addr
, GDB_SIGNAL_0
);
1142 /* Continue program giving it specified signal. */
1145 signal_command (const char *signum_exp
, int from_tty
)
1147 enum gdb_signal oursig
;
1150 dont_repeat (); /* Too dangerous. */
1152 ensure_not_tfind_mode ();
1153 ensure_valid_thread ();
1154 ensure_not_running ();
1156 /* Find out whether we must run in the background. */
1157 gdb::unique_xmalloc_ptr
<char> stripped
1158 = strip_bg_char (signum_exp
, &async_exec
);
1159 signum_exp
= stripped
.get ();
1161 prepare_execution_command (current_inferior ()->top_target (), async_exec
);
1164 error_no_arg (_("signal number"));
1166 /* It would be even slicker to make signal names be valid expressions,
1167 (the type could be "enum $signal" or some such), then the user could
1168 assign them to convenience variables. */
1169 oursig
= gdb_signal_from_name (signum_exp
);
1171 if (oursig
== GDB_SIGNAL_UNKNOWN
)
1173 /* No, try numeric. */
1174 int num
= parse_and_eval_long (signum_exp
);
1177 oursig
= GDB_SIGNAL_0
;
1179 oursig
= gdb_signal_from_command (num
);
1182 /* Look for threads other than the current that this command ends up
1183 resuming too (due to schedlock off), and warn if they'll get a
1184 signal delivered. "signal 0" is used to suppress a previous
1185 signal, but if the current thread is no longer the one that got
1186 the signal, then the user is potentially suppressing the signal
1187 of the wrong thread. */
1190 int must_confirm
= 0;
1192 /* This indicates what will be resumed. Either a single thread,
1193 a whole process, or all threads of all processes. */
1194 ptid_t resume_ptid
= user_visible_resume_ptid (0);
1195 process_stratum_target
*resume_target
1196 = user_visible_resume_target (resume_ptid
);
1198 thread_info
*current
= inferior_thread ();
1200 for (thread_info
*tp
: all_non_exited_threads (resume_target
, resume_ptid
))
1205 if (tp
->stop_signal () != GDB_SIGNAL_0
1206 && signal_pass_state (tp
->stop_signal ()))
1209 gdb_printf (_("Note:\n"));
1210 gdb_printf (_(" Thread %s previously stopped with signal %s, %s.\n"),
1211 print_thread_id (tp
),
1212 gdb_signal_to_name (tp
->stop_signal ()),
1213 gdb_signal_to_string (tp
->stop_signal ()));
1219 && !query (_("Continuing thread %s (the current thread) with specified signal will\n"
1220 "still deliver the signals noted above to their respective threads.\n"
1221 "Continue anyway? "),
1222 print_thread_id (inferior_thread ())))
1223 error (_("Not confirmed."));
1228 if (oursig
== GDB_SIGNAL_0
)
1229 gdb_printf (_("Continuing with no signal.\n"));
1231 gdb_printf (_("Continuing with signal %s.\n"),
1232 gdb_signal_to_name (oursig
));
1235 clear_proceed_status (0);
1236 proceed ((CORE_ADDR
) -1, oursig
);
1239 /* Queue a signal to be delivered to the current thread. */
1242 queue_signal_command (const char *signum_exp
, int from_tty
)
1244 enum gdb_signal oursig
;
1245 struct thread_info
*tp
;
1248 ensure_not_tfind_mode ();
1249 ensure_valid_thread ();
1250 ensure_not_running ();
1252 if (signum_exp
== nullptr)
1253 error_no_arg (_("signal number"));
1255 /* It would be even slicker to make signal names be valid expressions,
1256 (the type could be "enum $signal" or some such), then the user could
1257 assign them to convenience variables. */
1258 oursig
= gdb_signal_from_name (signum_exp
);
1260 if (oursig
== GDB_SIGNAL_UNKNOWN
)
1262 /* No, try numeric. */
1263 int num
= parse_and_eval_long (signum_exp
);
1266 oursig
= GDB_SIGNAL_0
;
1268 oursig
= gdb_signal_from_command (num
);
1271 if (oursig
!= GDB_SIGNAL_0
1272 && !signal_pass_state (oursig
))
1273 error (_("Signal handling set to not pass this signal to the program."));
1275 tp
= inferior_thread ();
1276 tp
->set_stop_signal (oursig
);
1279 /* Data for the FSM that manages the until (with no argument)
1282 struct until_next_fsm
: public thread_fsm
1284 /* The thread that as current when the command was executed. */
1287 until_next_fsm (struct interp
*cmd_interp
, int thread
)
1288 : thread_fsm (cmd_interp
),
1293 bool should_stop (struct thread_info
*thread
) override
;
1294 void clean_up (struct thread_info
*thread
) override
;
1295 enum async_reply_reason
do_async_reply_reason () override
;
1298 /* Implementation of the 'should_stop' FSM method for the until (with
1302 until_next_fsm::should_stop (struct thread_info
*tp
)
1304 if (tp
->control
.stop_step
)
1310 /* Implementation of the 'clean_up' FSM method for the until (with no
1314 until_next_fsm::clean_up (struct thread_info
*thread
)
1316 delete_longjmp_breakpoint (thread
->global_num
);
1319 /* Implementation of the 'async_reply_reason' FSM method for the until
1320 (with no arg) command. */
1322 enum async_reply_reason
1323 until_next_fsm::do_async_reply_reason ()
1325 return EXEC_ASYNC_END_STEPPING_RANGE
;
1328 /* Proceed until we reach a different source line with pc greater than
1329 our current one or exit the function. We skip calls in both cases.
1331 Note that eventually this command should probably be changed so
1332 that only source lines are printed out when we hit the breakpoint
1333 we set. This may involve changes to wait_for_inferior and the
1334 proceed status code. */
1337 until_next_command (int from_tty
)
1339 frame_info_ptr frame
;
1341 struct symbol
*func
;
1342 struct symtab_and_line sal
;
1343 struct thread_info
*tp
= inferior_thread ();
1344 int thread
= tp
->global_num
;
1345 struct until_next_fsm
*sm
;
1347 clear_proceed_status (0);
1348 set_step_frame (tp
);
1350 frame
= get_current_frame ();
1352 /* Step until either exited from this function or greater
1353 than the current line (if in symbolic section) or pc (if
1356 pc
= get_frame_pc (frame
);
1357 func
= find_pc_function (pc
);
1361 bound_minimal_symbol msymbol
= lookup_minimal_symbol_by_pc (pc
);
1363 if (msymbol
.minsym
== nullptr)
1364 error (_("Execution is not within a known function."));
1366 tp
->control
.step_range_start
= msymbol
.value_address ();
1367 /* The upper-bound of step_range is exclusive. In order to make PC
1368 within the range, set the step_range_end with PC + 1. */
1369 tp
->control
.step_range_end
= pc
+ 1;
1373 sal
= find_pc_line (pc
, 0);
1375 tp
->control
.step_range_start
= func
->value_block ()->entry_pc ();
1376 tp
->control
.step_range_end
= sal
.end
;
1378 tp
->control
.may_range_step
= 1;
1380 tp
->control
.step_over_calls
= STEP_OVER_ALL
;
1382 set_longjmp_breakpoint (tp
, get_frame_id (frame
));
1383 delete_longjmp_breakpoint_cleanup
lj_deleter (thread
);
1385 sm
= new until_next_fsm (command_interp (), tp
->global_num
);
1386 tp
->set_thread_fsm (std::unique_ptr
<thread_fsm
> (sm
));
1387 lj_deleter
.release ();
1389 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
1393 until_command (const char *arg
, int from_tty
)
1398 ensure_not_tfind_mode ();
1399 ensure_valid_thread ();
1400 ensure_not_running ();
1402 /* Find out whether we must run in the background. */
1403 gdb::unique_xmalloc_ptr
<char> stripped
= strip_bg_char (arg
, &async_exec
);
1404 arg
= stripped
.get ();
1406 prepare_execution_command (current_inferior ()->top_target (), async_exec
);
1409 until_break_command (arg
, from_tty
, 0);
1411 until_next_command (from_tty
);
1415 advance_command (const char *arg
, int from_tty
)
1420 ensure_not_tfind_mode ();
1421 ensure_valid_thread ();
1422 ensure_not_running ();
1425 error_no_arg (_("a location"));
1427 /* Find out whether we must run in the background. */
1428 gdb::unique_xmalloc_ptr
<char> stripped
= strip_bg_char (arg
, &async_exec
);
1429 arg
= stripped
.get ();
1431 prepare_execution_command (current_inferior ()->top_target (), async_exec
);
1433 until_break_command (arg
, from_tty
, 1);
1436 /* See inferior.h. */
1439 get_return_value (struct symbol
*func_symbol
, struct value
*function
)
1441 regcache
*stop_regs
= get_thread_regcache (inferior_thread ());
1442 struct gdbarch
*gdbarch
= stop_regs
->arch ();
1443 struct value
*value
;
1445 struct type
*value_type
1446 = check_typedef (func_symbol
->type ()->target_type ());
1447 gdb_assert (value_type
->code () != TYPE_CODE_VOID
);
1449 if (is_nocall_function (check_typedef (function
->type ())))
1451 warning (_("Function '%s' does not follow the target calling "
1452 "convention, cannot determine its returned value."),
1453 func_symbol
->print_name ());
1458 /* FIXME: 2003-09-27: When returning from a nested inferior function
1459 call, it's possible (with no help from the architecture vector)
1460 to locate and return/print a "struct return" value. This is just
1461 a more complicated case of what is already being done in the
1462 inferior function call code. In fact, when inferior function
1463 calls are made async, this will likely be made the norm. */
1465 switch (gdbarch_return_value_as_value (gdbarch
, function
, value_type
,
1466 nullptr, nullptr, nullptr))
1468 case RETURN_VALUE_REGISTER_CONVENTION
:
1469 case RETURN_VALUE_ABI_RETURNS_ADDRESS
:
1470 case RETURN_VALUE_ABI_PRESERVES_ADDRESS
:
1471 gdbarch_return_value_as_value (gdbarch
, function
, value_type
, stop_regs
,
1474 case RETURN_VALUE_STRUCT_CONVENTION
:
1478 internal_error (_("bad switch"));
1484 /* Helper for print_return_value. */
1487 print_return_value_1 (struct ui_out
*uiout
, struct return_value_info
*rv
)
1489 if (rv
->value
!= nullptr)
1492 uiout
->text ("Value returned is ");
1493 uiout
->field_fmt ("gdb-result-var", "$%d",
1494 rv
->value_history_index
);
1495 uiout
->text (" = ");
1499 struct value_print_options opts
;
1500 get_user_print_options (&opts
);
1503 value_print (rv
->value
, &stb
, &opts
);
1504 uiout
->field_stream ("return-value", stb
);
1507 uiout
->field_string ("return-value", _("<not displayed>"),
1508 metadata_style
.style ());
1513 std::string type_name
= type_to_string (rv
->type
);
1514 uiout
->text ("Value returned has type: ");
1515 uiout
->field_string ("return-type", type_name
);
1517 uiout
->text (" Cannot determine contents\n");
1521 /* Print the result of a function at the end of a 'finish' command.
1522 RV points at an object representing the captured return value/type
1523 and its position in the value history. */
1526 print_return_value (struct ui_out
*uiout
, struct return_value_info
*rv
)
1528 if (rv
->type
== nullptr
1529 || check_typedef (rv
->type
)->code () == TYPE_CODE_VOID
)
1534 /* print_return_value_1 can throw an exception in some
1535 circumstances. We need to catch this so that we still
1536 delete the breakpoint. */
1537 print_return_value_1 (uiout
, rv
);
1539 catch (const gdb_exception_error
&ex
)
1541 exception_print (gdb_stdout
, ex
);
1545 /* Data for the FSM that manages the finish command. */
1547 struct finish_command_fsm
: public thread_fsm
1549 /* The momentary breakpoint set at the function's return address in
1551 breakpoint_up breakpoint
;
1553 /* The function that we're stepping out of. */
1554 struct symbol
*function
= nullptr;
1556 /* If the FSM finishes successfully, this stores the function's
1558 struct return_value_info return_value_info
{};
1560 /* If the current function uses the "struct return convention",
1561 this holds the address at which the value being returned will
1562 be stored, or zero if that address could not be determined or
1563 the "struct return convention" is not being used. */
1564 CORE_ADDR return_buf
;
1566 explicit finish_command_fsm (struct interp
*cmd_interp
)
1567 : thread_fsm (cmd_interp
)
1571 bool should_stop (struct thread_info
*thread
) override
;
1572 void clean_up (struct thread_info
*thread
) override
;
1573 struct return_value_info
*return_value () override
;
1574 enum async_reply_reason
do_async_reply_reason () override
;
1577 /* Implementation of the 'should_stop' FSM method for the finish
1578 commands. Detects whether the thread stepped out of the function
1579 successfully, and if so, captures the function's return value and
1580 marks the FSM finished. */
1583 finish_command_fsm::should_stop (struct thread_info
*tp
)
1585 struct return_value_info
*rv
= &return_value_info
;
1587 if (function
!= nullptr
1588 && bpstat_find_breakpoint (tp
->control
.stop_bpstat
,
1589 breakpoint
.get ()) != nullptr)
1594 rv
->type
= function
->type ()->target_type ();
1595 if (rv
->type
== nullptr)
1596 internal_error (_("finish_command: function has no target type"));
1598 if (check_typedef (rv
->type
)->code () != TYPE_CODE_VOID
)
1602 func
= read_var_value (function
, nullptr, get_current_frame ());
1604 if (return_buf
!= 0)
1605 /* Retrieve return value from the buffer where it was saved. */
1606 rv
->value
= value_at (rv
->type
, return_buf
);
1608 rv
->value
= get_return_value (function
, func
);
1610 if (rv
->value
!= nullptr)
1611 rv
->value_history_index
= rv
->value
->record_latest ();
1614 else if (tp
->control
.stop_step
)
1616 /* Finishing from an inline frame, or reverse finishing. In
1617 either case, there's no way to retrieve the return value. */
1624 /* Implementation of the 'clean_up' FSM method for the finish
1628 finish_command_fsm::clean_up (struct thread_info
*thread
)
1630 breakpoint
.reset ();
1631 delete_longjmp_breakpoint (thread
->global_num
);
1634 /* Implementation of the 'return_value' FSM method for the finish
1637 struct return_value_info
*
1638 finish_command_fsm::return_value ()
1640 return &return_value_info
;
1643 /* Implementation of the 'async_reply_reason' FSM method for the
1646 enum async_reply_reason
1647 finish_command_fsm::do_async_reply_reason ()
1649 if (execution_direction
== EXEC_REVERSE
)
1650 return EXEC_ASYNC_END_STEPPING_RANGE
;
1652 return EXEC_ASYNC_FUNCTION_FINISHED
;
1655 /* finish_backward -- helper function for finish_command. */
1658 finish_backward (struct finish_command_fsm
*sm
)
1660 struct symtab_and_line sal
;
1661 struct thread_info
*tp
= inferior_thread ();
1663 CORE_ADDR func_addr
;
1664 CORE_ADDR alt_entry_point
;
1665 CORE_ADDR entry_point
;
1666 frame_info_ptr frame
= get_selected_frame (nullptr);
1667 struct gdbarch
*gdbarch
= get_frame_arch (frame
);
1669 pc
= get_frame_pc (get_current_frame ());
1671 if (find_pc_partial_function (pc
, nullptr, &func_addr
, nullptr) == 0)
1672 error (_("Cannot find bounds of current function"));
1674 sal
= find_pc_line (func_addr
, 0);
1675 alt_entry_point
= sal
.pc
;
1676 entry_point
= alt_entry_point
;
1678 if (gdbarch_skip_entrypoint_p (gdbarch
))
1679 /* Some architectures, like PowerPC use local and global entry points.
1680 There is only one Entry Point (GEP = LEP) for other architectures.
1681 The GEP is an alternate entry point. The LEP is the normal entry point.
1682 The value of entry_point was initialized to the alternate entry point
1683 (GEP). It will be adjusted to the normal entry point if the function
1684 has two entry points. */
1685 entry_point
= gdbarch_skip_entrypoint (gdbarch
, sal
.pc
);
1687 tp
->control
.proceed_to_finish
= 1;
1688 /* Special case: if we're sitting at the function entry point,
1689 then all we need to do is take a reverse singlestep. We
1690 don't need to set a breakpoint, and indeed it would do us
1693 Note that this can only happen at frame #0, since there's
1694 no way that a function up the stack can have a return address
1695 that's equal to its entry point. */
1697 if ((pc
< alt_entry_point
) || (pc
> entry_point
))
1699 /* We are in the body of the function. Set a breakpoint to go back to
1700 the normal entry point. */
1701 symtab_and_line sr_sal
;
1702 sr_sal
.pc
= entry_point
;
1703 sr_sal
.pspace
= get_frame_program_space (frame
);
1704 insert_step_resume_breakpoint_at_sal (gdbarch
,
1705 sr_sal
, null_frame_id
);
1707 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
1711 /* We are either at one of the entry points or between the entry points.
1712 If we are not at the alt_entry point, go back to the alt_entry_point
1713 If we at the normal entry point step back one instruction, when we
1714 stop we will determine if we entered via the entry point or the
1715 alternate entry point. If we are at the alternate entry point,
1716 single step back to the function call. */
1717 tp
->control
.step_range_start
= tp
->control
.step_range_end
= 1;
1718 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
1722 /* finish_forward -- helper function for finish_command. FRAME is the
1723 frame that called the function we're about to step out of. */
1726 finish_forward (struct finish_command_fsm
*sm
, const frame_info_ptr
&frame
)
1728 struct frame_id frame_id
= get_frame_id (frame
);
1729 struct gdbarch
*gdbarch
= get_frame_arch (frame
);
1730 struct symtab_and_line sal
;
1731 struct thread_info
*tp
= inferior_thread ();
1733 sal
= find_pc_line (get_frame_pc (frame
), 0);
1734 sal
.pc
= get_frame_pc (frame
);
1736 sm
->breakpoint
= set_momentary_breakpoint (gdbarch
, sal
,
1737 get_stack_frame_id (frame
),
1740 set_longjmp_breakpoint (tp
, frame_id
);
1742 /* We want to print return value, please... */
1743 tp
->control
.proceed_to_finish
= 1;
1745 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
1748 /* Skip frames for "finish". */
1750 static frame_info_ptr
1751 skip_finish_frames (const frame_info_ptr
&initial_frame
)
1753 frame_info_ptr start
;
1754 frame_info_ptr frame
= initial_frame
;
1760 frame
= skip_tailcall_frames (frame
);
1761 if (frame
== nullptr)
1764 frame
= skip_unwritable_frames (frame
);
1765 if (frame
== nullptr)
1768 while (start
!= frame
);
1773 /* "finish": Set a temporary breakpoint at the place the selected
1774 frame will return to, then continue. */
1777 finish_command (const char *arg
, int from_tty
)
1779 frame_info_ptr frame
;
1781 struct finish_command_fsm
*sm
;
1782 struct thread_info
*tp
;
1785 ensure_not_tfind_mode ();
1786 ensure_valid_thread ();
1787 ensure_not_running ();
1789 /* Find out whether we must run in the background. */
1790 gdb::unique_xmalloc_ptr
<char> stripped
= strip_bg_char (arg
, &async_exec
);
1791 arg
= stripped
.get ();
1793 prepare_execution_command (current_inferior ()->top_target (), async_exec
);
1796 error (_("The \"finish\" command does not take any arguments."));
1798 frame
= get_prev_frame (get_selected_frame (_("No selected frame.")));
1800 error (_("\"finish\" not meaningful in the outermost frame."));
1802 clear_proceed_status (0);
1804 tp
= inferior_thread ();
1806 sm
= new finish_command_fsm (command_interp ());
1808 tp
->set_thread_fsm (std::unique_ptr
<thread_fsm
> (sm
));
1810 /* Finishing from an inline frame is completely different. We don't
1811 try to show the "return value" - no way to locate it. */
1812 if (get_frame_type (get_selected_frame (_("No selected frame.")))
1815 /* Claim we are stepping in the calling frame. An empty step
1816 range means that we will stop once we aren't in a function
1817 called by that frame. We don't use the magic "1" value for
1818 step_range_end, because then infrun will think this is nexti,
1819 and not step over the rest of this inlined function call. */
1820 set_step_info (tp
, frame
, {});
1821 tp
->control
.step_range_start
= get_frame_pc (frame
);
1822 tp
->control
.step_range_end
= tp
->control
.step_range_start
;
1823 tp
->control
.step_over_calls
= STEP_OVER_ALL
;
1825 /* Print info on the selected frame, including level number but not
1829 gdb_printf (_("Run till exit from "));
1830 print_stack_frame (get_selected_frame (nullptr), 1, LOCATION
, 0);
1833 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
1837 /* Find the function we will return from. */
1838 frame_info_ptr callee_frame
= get_selected_frame (nullptr);
1839 sm
->function
= find_pc_function (get_frame_pc (callee_frame
));
1840 sm
->return_buf
= 0; /* Initialize buffer address is not available. */
1842 /* Determine the return convention. If it is RETURN_VALUE_STRUCT_CONVENTION,
1843 attempt to determine the address of the return buffer. */
1844 if (sm
->function
!= nullptr)
1846 enum return_value_convention return_value
;
1847 struct gdbarch
*gdbarch
= get_frame_arch (callee_frame
);
1849 struct type
* val_type
1850 = check_typedef (sm
->function
->type ()->target_type ());
1853 = gdbarch_return_value_as_value (gdbarch
,
1854 read_var_value (sm
->function
, nullptr,
1856 val_type
, nullptr, nullptr, nullptr);
1858 if (return_value
== RETURN_VALUE_STRUCT_CONVENTION
1859 && val_type
->code () != TYPE_CODE_VOID
)
1860 sm
->return_buf
= gdbarch_get_return_buf_addr (gdbarch
, val_type
,
1864 /* Print info on the selected frame, including level number but not
1868 if (execution_direction
== EXEC_REVERSE
)
1869 gdb_printf (_("Run back to call of "));
1872 if (sm
->function
!= nullptr && TYPE_NO_RETURN (sm
->function
->type ())
1873 && !query (_("warning: Function %s does not return normally.\n"
1874 "Try to finish anyway? "),
1875 sm
->function
->print_name ()))
1876 error (_("Not confirmed."));
1877 gdb_printf (_("Run till exit from "));
1880 print_stack_frame (callee_frame
, 1, LOCATION
, 0);
1883 if (execution_direction
== EXEC_REVERSE
)
1884 finish_backward (sm
);
1887 frame
= skip_finish_frames (frame
);
1889 if (frame
== nullptr)
1890 error (_("Cannot find the caller frame."));
1892 finish_forward (sm
, frame
);
1898 info_program_command (const char *args
, int from_tty
)
1900 scoped_restore_current_thread restore_thread
;
1904 /* In non-stop, since every thread is controlled individually, we'll
1905 show execution info about the current thread. In all-stop, we'll
1906 show execution info about the last stop. */
1910 if (!target_has_execution ())
1912 gdb_printf (_("The program being debugged is not being run.\n"));
1916 if (inferior_ptid
== null_ptid
)
1917 error (_("No selected thread."));
1919 tp
= inferior_thread ();
1921 gdb_printf (_("Selected thread %s (%s).\n"),
1922 print_thread_id (tp
),
1923 target_pid_to_str (tp
->ptid
).c_str ());
1925 if (tp
->state
== THREAD_EXITED
)
1927 gdb_printf (_("Selected thread has exited.\n"));
1930 else if (tp
->state
== THREAD_RUNNING
)
1932 gdb_printf (_("Selected thread is running.\n"));
1938 tp
= get_previous_thread ();
1942 gdb_printf (_("The program being debugged is not being run.\n"));
1946 switch_to_thread (tp
);
1948 gdb_printf (_("Last stopped for thread %s (%s).\n"),
1949 print_thread_id (tp
),
1950 target_pid_to_str (tp
->ptid
).c_str ());
1952 if (tp
->state
== THREAD_EXITED
)
1954 gdb_printf (_("Thread has since exited.\n"));
1958 if (tp
->state
== THREAD_RUNNING
)
1960 gdb_printf (_("Thread is now running.\n"));
1966 bpstat
*bs
= tp
->control
.stop_bpstat
;
1967 int stat
= bpstat_num (&bs
, &num
);
1969 target_files_info ();
1970 gdb_printf (_("Program stopped at %s.\n"),
1971 paddress (current_inferior ()->arch (), tp
->stop_pc ()));
1972 if (tp
->control
.stop_step
)
1973 gdb_printf (_("It stopped after being stepped.\n"));
1976 /* There may be several breakpoints in the same place, so this
1977 isn't as strange as it seems. */
1982 gdb_printf (_("It stopped at a breakpoint "
1983 "that has since been deleted.\n"));
1986 gdb_printf (_("It stopped at breakpoint %d.\n"), num
);
1987 stat
= bpstat_num (&bs
, &num
);
1990 else if (tp
->stop_signal () != GDB_SIGNAL_0
)
1992 gdb_printf (_("It stopped with signal %s, %s.\n"),
1993 gdb_signal_to_name (tp
->stop_signal ()),
1994 gdb_signal_to_string (tp
->stop_signal ()));
1998 gdb_printf (_("Type \"%ps\" or \"%ps\" for more information.\n"),
1999 styled_string (command_style
.style (), "info stack"),
2000 styled_string (command_style
.style (), "info registers"));
2004 environment_info (const char *var
, int from_tty
)
2008 const char *val
= current_inferior ()->environment
.get (var
);
2019 gdb_puts ("Environment variable \"");
2021 gdb_puts ("\" not defined.\n");
2026 char **envp
= current_inferior ()->environment
.envp ();
2028 for (int idx
= 0; envp
[idx
] != nullptr; ++idx
)
2030 gdb_puts (envp
[idx
]);
2037 set_environment_command (const char *arg
, int from_tty
)
2039 const char *p
, *val
;
2043 error_no_arg (_("environment variable and value"));
2045 /* Find separation between variable name and value. */
2046 p
= (char *) strchr (arg
, '=');
2047 val
= (char *) strchr (arg
, ' ');
2049 if (p
!= 0 && val
!= 0)
2051 /* We have both a space and an equals. If the space is before the
2052 equals, walk forward over the spaces til we see a nonspace
2053 (possibly the equals). */
2058 /* Now if the = is after the char following the spaces,
2059 take the char following the spaces. */
2063 else if (val
!= 0 && p
== 0)
2067 error_no_arg (_("environment variable to set"));
2069 if (p
== 0 || p
[1] == 0)
2073 p
= arg
+ strlen (arg
); /* So that savestring below will work. */
2077 /* Not setting variable value to null. */
2079 while (*val
== ' ' || *val
== '\t')
2083 while (p
!= arg
&& (p
[-1] == ' ' || p
[-1] == '\t'))
2086 std::string
var (arg
, p
- arg
);
2089 gdb_printf (_("Setting environment variable "
2090 "\"%s\" to null value.\n"),
2092 current_inferior ()->environment
.set (var
.c_str (), "");
2095 current_inferior ()->environment
.set (var
.c_str (), val
);
2099 unset_environment_command (const char *var
, int from_tty
)
2103 /* If there is no argument, delete all environment variables.
2104 Ask for confirmation if reading from the terminal. */
2105 if (!from_tty
|| query (_("Delete all environment variables? ")))
2106 current_inferior ()->environment
.clear ();
2109 current_inferior ()->environment
.unset (var
);
2112 /* Handle the execution path (PATH variable). */
2114 static const char path_var_name
[] = "PATH";
2117 path_info (const char *args
, int from_tty
)
2119 const char *env
= current_inferior ()->environment
.get (path_var_name
);
2121 gdb_printf (_("Executable and object file path: %s\n"),
2122 env
!= nullptr ? env
: "");
2125 /* Add zero or more directories to the front of the execution path. */
2128 path_command (const char *dirname
, int from_tty
)
2133 env
= current_inferior ()->environment
.get (path_var_name
);
2134 /* Can be null if path is not set. */
2137 std::string exec_path
= env
;
2138 mod_path (dirname
, exec_path
);
2139 current_inferior ()->environment
.set (path_var_name
, exec_path
.c_str ());
2141 path_info (nullptr, from_tty
);
2146 pad_to_column (string_file
&stream
, int col
)
2148 /* At least one space must be printed to separate columns. */
2150 const int size
= stream
.size ();
2152 stream
.puts (n_spaces (col
- size
));
2155 /* Print out the register NAME with value VAL, to FILE, in the default
2159 default_print_one_register_info (struct ui_file
*file
,
2163 struct type
*regtype
= val
->type ();
2164 int print_raw_format
;
2165 string_file format_stream
;
2168 value_column_1
= 15,
2169 /* Give enough room for "0x", 16 hex digits and two spaces in
2170 preceding column. */
2171 value_column_2
= value_column_1
+ 2 + 16 + 2,
2174 format_stream
.puts (name
);
2175 pad_to_column (format_stream
, value_column_1
);
2177 print_raw_format
= (val
->entirely_available ()
2178 && !val
->optimized_out ());
2180 /* If virtual format is floating, print it that way, and in raw
2182 if (regtype
->code () == TYPE_CODE_FLT
2183 || regtype
->code () == TYPE_CODE_DECFLOAT
)
2185 struct value_print_options opts
;
2186 const gdb_byte
*valaddr
= val
->contents_for_printing ().data ();
2187 enum bfd_endian byte_order
= type_byte_order (regtype
);
2189 get_user_print_options (&opts
);
2190 opts
.deref_ref
= true;
2192 common_val_print (val
, &format_stream
, 0, &opts
, current_language
);
2194 if (print_raw_format
)
2196 pad_to_column (format_stream
, value_column_2
);
2197 format_stream
.puts ("(raw ");
2198 print_hex_chars (&format_stream
, valaddr
, regtype
->length (),
2200 format_stream
.putc (')');
2205 struct value_print_options opts
;
2207 /* Print the register in hex. */
2208 get_formatted_print_options (&opts
, 'x');
2209 opts
.deref_ref
= true;
2210 common_val_print (val
, &format_stream
, 0, &opts
, current_language
);
2211 /* If not a vector register, print it also according to its
2213 if (print_raw_format
&& regtype
->is_vector () == 0)
2215 pad_to_column (format_stream
, value_column_2
);
2216 get_user_print_options (&opts
);
2217 opts
.deref_ref
= true;
2218 common_val_print (val
, &format_stream
, 0, &opts
, current_language
);
2222 gdb_puts (format_stream
.c_str (), file
);
2223 gdb_printf (file
, "\n");
2226 /* Print out the machine register regnum. If regnum is -1, print all
2227 registers (print_all == 1) or all non-float and non-vector
2228 registers (print_all == 0).
2230 For most machines, having all_registers_info() print the
2231 register(s) one per line is good enough. If a different format is
2232 required, (eg, for MIPS or Pyramid 90x, which both have lots of
2233 regs), or there is an existing convention for showing all the
2234 registers, define the architecture method PRINT_REGISTERS_INFO to
2235 provide that format. */
2238 default_print_registers_info (struct gdbarch
*gdbarch
,
2239 struct ui_file
*file
,
2240 const frame_info_ptr
&frame
,
2241 int regnum
, int print_all
)
2244 const int numregs
= gdbarch_num_cooked_regs (gdbarch
);
2246 for (i
= 0; i
< numregs
; i
++)
2248 /* Decide between printing all regs, non-float / vector regs, or
2254 if (!gdbarch_register_reggroup_p (gdbarch
, i
, all_reggroup
))
2259 if (!gdbarch_register_reggroup_p (gdbarch
, i
, general_reggroup
))
2269 /* If the register name is empty, it is undefined for this
2270 processor, so don't display anything. */
2271 if (*(gdbarch_register_name (gdbarch
, i
)) == '\0')
2274 default_print_one_register_info
2275 (file
, gdbarch_register_name (gdbarch
, i
),
2276 value_of_register (i
, get_next_frame_sentinel_okay (frame
)));
2281 registers_info (const char *addr_exp
, int fpregs
)
2283 frame_info_ptr frame
;
2284 struct gdbarch
*gdbarch
;
2286 if (!target_has_registers ())
2287 error (_("The program has no registers now."));
2288 frame
= get_selected_frame (nullptr);
2289 gdbarch
= get_frame_arch (frame
);
2293 gdbarch_print_registers_info (gdbarch
, gdb_stdout
,
2298 while (*addr_exp
!= '\0')
2303 /* Skip leading white space. */
2304 addr_exp
= skip_spaces (addr_exp
);
2306 /* Discard any leading ``$''. Check that there is something
2307 resembling a register following it. */
2308 if (addr_exp
[0] == '$')
2310 if (isspace ((*addr_exp
)) || (*addr_exp
) == '\0')
2311 error (_("Missing register name"));
2313 /* Find the start/end of this register name/num/group. */
2315 while ((*addr_exp
) != '\0' && !isspace ((*addr_exp
)))
2319 /* Figure out what we've found and display it. */
2321 /* A register name? */
2323 int regnum
= user_reg_map_name_to_regnum (gdbarch
, start
, end
- start
);
2327 /* User registers lie completely outside of the range of
2328 normal registers. Catch them early so that the target
2330 if (regnum
>= gdbarch_num_cooked_regs (gdbarch
))
2332 struct value
*regval
= value_of_user_reg (regnum
, frame
);
2333 const char *regname
= user_reg_map_regnum_to_name (gdbarch
,
2336 /* Print in the same fashion
2337 gdbarch_print_registers_info's default
2338 implementation prints. */
2339 default_print_one_register_info (gdb_stdout
,
2344 gdbarch_print_registers_info (gdbarch
, gdb_stdout
,
2345 frame
, regnum
, fpregs
);
2350 /* A register group? */
2352 const struct reggroup
*group
= nullptr;
2353 for (const struct reggroup
*g
: gdbarch_reggroups (gdbarch
))
2355 /* Don't bother with a length check. Should the user
2356 enter a short register group name, go with the first
2357 group that matches. */
2358 if (strncmp (start
, g
->name (), end
- start
) == 0)
2364 if (group
!= nullptr)
2369 regnum
< gdbarch_num_cooked_regs (gdbarch
);
2372 if (gdbarch_register_reggroup_p (gdbarch
, regnum
, group
))
2373 gdbarch_print_registers_info (gdbarch
,
2381 /* Nothing matched. */
2382 error (_("Invalid register `%.*s'"), (int) (end
- start
), start
);
2387 info_all_registers_command (const char *addr_exp
, int from_tty
)
2389 registers_info (addr_exp
, 1);
2393 info_registers_command (const char *addr_exp
, int from_tty
)
2395 registers_info (addr_exp
, 0);
2399 print_vector_info (struct ui_file
*file
,
2400 const frame_info_ptr
&frame
, const char *args
)
2402 struct gdbarch
*gdbarch
= get_frame_arch (frame
);
2404 if (gdbarch_print_vector_info_p (gdbarch
))
2405 gdbarch_print_vector_info (gdbarch
, file
, frame
, args
);
2409 int printed_something
= 0;
2411 for (regnum
= 0; regnum
< gdbarch_num_cooked_regs (gdbarch
); regnum
++)
2413 if (gdbarch_register_reggroup_p (gdbarch
, regnum
, vector_reggroup
))
2415 printed_something
= 1;
2416 gdbarch_print_registers_info (gdbarch
, file
, frame
, regnum
, 1);
2419 if (!printed_something
)
2420 gdb_printf (file
, "No vector information\n");
2425 info_vector_command (const char *args
, int from_tty
)
2427 if (!target_has_registers ())
2428 error (_("The program has no registers now."));
2430 print_vector_info (gdb_stdout
, get_selected_frame (nullptr), args
);
2433 /* Kill the inferior process. Make us have no inferior. */
2436 kill_command (const char *arg
, int from_tty
)
2438 /* FIXME: This should not really be inferior_ptid (or target_has_execution).
2439 It should be a distinct flag that indicates that a target is active, cuz
2440 some targets don't have processes! */
2442 if (inferior_ptid
== null_ptid
)
2443 error (_("The program is not being run."));
2444 if (!query (_("Kill the program being debugged? ")))
2445 error (_("Not confirmed."));
2447 int pid
= current_inferior ()->pid
;
2448 /* Save the pid as a string before killing the inferior, since that
2449 may unpush the current target, and we need the string after. */
2450 std::string pid_str
= target_pid_to_str (ptid_t (pid
));
2451 int infnum
= current_inferior ()->num
;
2455 update_previous_thread ();
2457 if (print_inferior_events
)
2458 gdb_printf (_("[Inferior %d (%s) killed]\n"),
2459 infnum
, pid_str
.c_str ());
2462 /* Used in `attach&' command. Proceed threads of inferior INF iff
2463 they stopped due to debugger request, and when they did, they
2464 reported a clean stop (GDB_SIGNAL_0). Do not proceed threads that
2465 have been explicitly been told to stop. */
2468 proceed_after_attach (inferior
*inf
)
2470 /* Don't error out if the current thread is running, because
2471 there may be other stopped threads. */
2473 /* Backup current thread and selected frame. */
2474 scoped_restore_current_thread restore_thread
;
2476 for (thread_info
*thread
: inf
->non_exited_threads ())
2477 if (!thread
->executing ()
2478 && !thread
->stop_requested
2479 && thread
->stop_signal () == GDB_SIGNAL_0
)
2481 switch_to_thread (thread
);
2482 clear_proceed_status (0);
2483 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
2487 /* See inferior.h. */
2490 setup_inferior (int from_tty
)
2492 struct inferior
*inferior
;
2494 inferior
= current_inferior ();
2495 inferior
->needs_setup
= false;
2497 /* If no exec file is yet known, try to determine it from the
2499 if (current_program_space
->exec_filename () == nullptr)
2500 exec_file_locate_attach (inferior_ptid
.pid (), 1, from_tty
);
2503 reopen_exec_file ();
2504 reread_symbols (from_tty
);
2507 /* Take any necessary post-attaching actions for this platform. */
2508 target_post_attach (inferior_ptid
.pid ());
2510 post_create_inferior (from_tty
, true);
2513 /* What to do after the first program stops after attaching. */
2514 enum attach_post_wait_mode
2516 /* Do nothing. Leaves threads as they are. */
2517 ATTACH_POST_WAIT_NOTHING
,
2519 /* Re-resume threads that are marked running. */
2520 ATTACH_POST_WAIT_RESUME
,
2522 /* Stop all threads. */
2523 ATTACH_POST_WAIT_STOP
,
2526 /* Called after we've attached to a process and we've seen it stop for
2527 the first time. Resume, stop, or don't touch the threads according
2531 attach_post_wait (int from_tty
, enum attach_post_wait_mode mode
)
2533 struct inferior
*inferior
;
2535 inferior
= current_inferior ();
2536 inferior
->control
.stop_soon
= NO_STOP_QUIETLY
;
2538 if (inferior
->needs_setup
)
2539 setup_inferior (from_tty
);
2541 if (mode
== ATTACH_POST_WAIT_RESUME
)
2543 /* The user requested an `attach&', so be sure to leave threads
2544 that didn't get a signal running. */
2546 /* Immediately resume all suspended threads of this inferior,
2547 and this inferior only. This should have no effect on
2548 already running threads. If a thread has been stopped with a
2549 signal, leave it be. */
2551 proceed_after_attach (inferior
);
2554 if (inferior_thread ()->stop_signal () == GDB_SIGNAL_0
)
2556 clear_proceed_status (0);
2557 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
2561 else if (mode
== ATTACH_POST_WAIT_STOP
)
2563 /* The user requested a plain `attach', so be sure to leave
2564 the inferior stopped. */
2566 /* At least the current thread is already stopped. */
2568 /* In all-stop, by definition, all threads have to be already
2569 stopped at this point. In non-stop, however, although the
2570 selected thread is stopped, others may still be executing.
2571 Be sure to explicitly stop all threads of the process. This
2572 should have no effect on already stopped threads. */
2574 target_stop (ptid_t (inferior
->pid
));
2575 else if (target_is_non_stop_p ())
2577 struct thread_info
*lowest
= inferior_thread ();
2579 stop_all_threads ("attaching");
2581 /* It's not defined which thread will report the attach
2582 stop. For consistency, always select the thread with
2583 lowest GDB number, which should be the main thread, if it
2585 for (thread_info
*thread
: current_inferior ()->non_exited_threads ())
2586 if (thread
->inf
->num
< lowest
->inf
->num
2587 || thread
->per_inf_num
< lowest
->per_inf_num
)
2590 switch_to_thread (lowest
);
2593 /* Tell the user/frontend where we're stopped. */
2595 if (deprecated_attach_hook
)
2596 deprecated_attach_hook ();
2600 /* "attach" command entry point. Takes a program started up outside
2601 of gdb and ``attaches'' to it. This stops it cold in its tracks
2602 and allows us to start debugging it. */
2605 attach_command (const char *args
, int from_tty
)
2608 struct target_ops
*attach_target
;
2609 struct inferior
*inferior
= current_inferior ();
2610 enum attach_post_wait_mode mode
;
2612 dont_repeat (); /* Not for the faint of heart */
2614 scoped_disable_commit_resumed
disable_commit_resumed ("attaching");
2616 if (gdbarch_has_global_solist (current_inferior ()->arch ()))
2617 /* Don't complain if all processes share the same symbol
2620 else if (target_has_execution ())
2622 if (query (_("A program is being debugged already. Kill it? ")))
2625 error (_("Not killed."));
2628 /* Clean up any leftovers from other runs. Some other things from
2629 this function should probably be moved into target_pre_inferior. */
2630 target_pre_inferior ();
2632 gdb::unique_xmalloc_ptr
<char> stripped
= strip_bg_char (args
, &async_exec
);
2633 args
= stripped
.get ();
2635 attach_target
= find_attach_target ();
2637 prepare_execution_command (attach_target
, async_exec
);
2639 if (non_stop
&& !attach_target
->supports_non_stop ())
2640 error (_("Cannot attach to this target in non-stop mode"));
2642 attach_target
->attach (args
, from_tty
);
2643 /* to_attach should push the target, so after this point we
2644 shouldn't refer to attach_target again. */
2645 attach_target
= nullptr;
2647 infrun_debug_show_threads ("immediately after attach",
2648 current_inferior ()->non_exited_threads ());
2650 /* Enable async mode if it is supported by the target. */
2651 if (target_can_async_p ())
2652 target_async (true);
2654 /* Set up the "saved terminal modes" of the inferior
2655 based on what modes we are starting it with. */
2656 target_terminal::init ();
2658 /* Install inferior's terminal modes. This may look like a no-op,
2659 as we've just saved them above, however, this does more than
2660 restore terminal settings:
2662 - installs a SIGINT handler that forwards SIGINT to the inferior.
2663 Otherwise a Ctrl-C pressed just while waiting for the initial
2664 stop would end up as a spurious Quit.
2666 - removes stdin from the event loop, which we need if attaching
2667 in the foreground, otherwise on targets that report an initial
2668 stop on attach (which are most) we'd process input/commands
2669 while we're in the event loop waiting for that stop. That is,
2670 before the attach continuation runs and the command is really
2672 target_terminal::inferior ();
2674 /* Set up execution context to know that we should return from
2675 wait_for_inferior as soon as the target reports a stop. */
2676 init_wait_for_inferior ();
2678 inferior
->needs_setup
= true;
2680 if (target_is_non_stop_p ())
2682 /* If we find that the current thread isn't stopped, explicitly
2683 do so now, because we're going to install breakpoints and
2687 /* The user requested an `attach&'; stop just one thread. */
2688 target_stop (inferior_ptid
);
2690 /* The user requested an `attach', so stop all threads of this
2692 target_stop (ptid_t (inferior_ptid
.pid ()));
2695 /* Check for exec file mismatch, and let the user solve it. */
2696 validate_exec_file (from_tty
);
2698 mode
= async_exec
? ATTACH_POST_WAIT_RESUME
: ATTACH_POST_WAIT_STOP
;
2700 /* Some system don't generate traps when attaching to inferior.
2701 E.g. Mach 3 or GNU hurd. */
2702 if (!target_attach_no_wait ())
2704 /* Careful here. See comments in inferior.h. Basically some
2705 OSes don't ignore SIGSTOPs on continue requests anymore. We
2706 need a way for handle_inferior_event to reset the stop_signal
2707 variable after an attach, and this is what
2708 STOP_QUIETLY_NO_SIGSTOP is for. */
2709 inferior
->control
.stop_soon
= STOP_QUIETLY_NO_SIGSTOP
;
2711 /* Wait for stop. */
2712 inferior
->add_continuation ([=] ()
2714 attach_post_wait (from_tty
, mode
);
2717 /* Let infrun consider waiting for events out of this
2719 inferior
->process_target ()->threads_executing
= true;
2721 if (!target_is_async_p ())
2722 mark_infrun_async_event_handler ();
2726 attach_post_wait (from_tty
, mode
);
2728 disable_commit_resumed
.reset_and_commit ();
2731 /* We had just found out that the target was already attached to an
2732 inferior. PTID points at a thread of this new inferior, that is
2733 the most likely to be stopped right now, but not necessarily so.
2734 The new inferior is assumed to be already added to the inferior
2735 list at this point. If LEAVE_RUNNING, then leave the threads of
2736 this inferior running, except those we've explicitly seen reported
2740 notice_new_inferior (thread_info
*thr
, bool leave_running
, int from_tty
)
2742 enum attach_post_wait_mode mode
2743 = leave_running
? ATTACH_POST_WAIT_RESUME
: ATTACH_POST_WAIT_NOTHING
;
2745 std::optional
<scoped_restore_current_thread
> restore_thread
;
2747 if (inferior_ptid
!= null_ptid
)
2748 restore_thread
.emplace ();
2750 /* Avoid reading registers -- we haven't fetched the target
2752 switch_to_thread_no_regs (thr
);
2754 /* When we "notice" a new inferior we need to do all the things we
2755 would normally do if we had just attached to it. */
2757 if (thr
->executing ())
2759 struct inferior
*inferior
= current_inferior ();
2761 /* We're going to install breakpoints, and poke at memory,
2762 ensure that the inferior is stopped for a moment while we do
2764 target_stop (inferior_ptid
);
2766 inferior
->control
.stop_soon
= STOP_QUIETLY_REMOTE
;
2768 /* Wait for stop before proceeding. */
2769 inferior
->add_continuation ([=] ()
2771 attach_post_wait (from_tty
, mode
);
2777 attach_post_wait (from_tty
, mode
);
2782 * takes a program previously attached to and detaches it.
2783 * The program resumes execution and will no longer stop
2784 * on signals, etc. We better not have left any breakpoints
2785 * in the program or it'll die when it hits one. For this
2786 * to work, it may be necessary for the process to have been
2787 * previously attached. It *might* work if the program was
2788 * started via the normal ptrace (PTRACE_TRACEME).
2792 detach_command (const char *args
, int from_tty
)
2794 dont_repeat (); /* Not for the faint of heart. */
2796 if (inferior_ptid
== null_ptid
)
2797 error (_("The program is not being run."));
2799 scoped_disable_commit_resumed
disable_commit_resumed ("detaching");
2801 query_if_trace_running (from_tty
);
2803 disconnect_tracing ();
2805 /* Hold a strong reference to the target while (maybe)
2806 detaching the parent. Otherwise detaching could close the
2808 inferior
*inf
= current_inferior ();
2809 auto target_ref
= target_ops_ref::new_reference (inf
->process_target ());
2811 /* Save this before detaching, since detaching may unpush the
2812 process_stratum target. */
2813 bool was_non_stop_p
= target_is_non_stop_p ();
2815 target_detach (inf
, from_tty
);
2817 update_previous_thread ();
2819 /* The current inferior process was just detached successfully. Get
2820 rid of breakpoints that no longer make sense. Note we don't do
2821 this within target_detach because that is also used when
2822 following child forks, and in that case we will want to transfer
2823 breakpoints to the child, not delete them. */
2824 breakpoint_init_inferior (inf
, inf_exited
);
2826 /* If the solist is global across inferiors, don't clear it when we
2827 detach from a single inferior. */
2828 if (!gdbarch_has_global_solist (inf
->arch ()))
2829 no_shared_libraries (inf
->pspace
);
2831 if (deprecated_detach_hook
)
2832 deprecated_detach_hook ();
2834 if (!was_non_stop_p
)
2835 restart_after_all_stop_detach (as_process_stratum_target (target_ref
.get ()));
2837 disable_commit_resumed
.reset_and_commit ();
2840 /* Disconnect from the current target without resuming it (leaving it
2841 waiting for a debugger).
2843 We'd better not have left any breakpoints in the program or the
2844 next debugger will get confused. Currently only supported for some
2845 remote targets, since the normal attach mechanisms don't work on
2846 stopped processes on some native platforms (e.g. GNU/Linux). */
2849 disconnect_command (const char *args
, int from_tty
)
2851 dont_repeat (); /* Not for the faint of heart. */
2852 query_if_trace_running (from_tty
);
2853 disconnect_tracing ();
2854 target_disconnect (args
, from_tty
);
2855 no_shared_libraries (current_program_space
);
2856 init_thread_list ();
2857 update_previous_thread ();
2858 if (deprecated_detach_hook
)
2859 deprecated_detach_hook ();
2862 /* Stop PTID in the current target, and tag the PTID threads as having
2863 been explicitly requested to stop. PTID can be a thread, a
2864 process, or minus_one_ptid, meaning all threads of all inferiors of
2865 the current target. */
2868 stop_current_target_threads_ns (ptid_t ptid
)
2872 /* Tag the thread as having been explicitly requested to stop, so
2873 other parts of gdb know not to resume this thread automatically,
2874 if it was stopped due to an internal event. Limit this to
2875 non-stop mode, as when debugging a multi-threaded application in
2876 all-stop mode, we will only get one stop event --- it's undefined
2877 which thread will report the event. */
2878 set_stop_requested (current_inferior ()->process_target (),
2882 /* See inferior.h. */
2885 interrupt_target_1 (bool all_threads
)
2887 scoped_disable_commit_resumed
disable_commit_resumed ("interrupting");
2893 scoped_restore_current_thread restore_thread
;
2895 for (inferior
*inf
: all_inferiors ())
2897 switch_to_inferior_no_thread (inf
);
2898 stop_current_target_threads_ns (minus_one_ptid
);
2902 stop_current_target_threads_ns (inferior_ptid
);
2905 target_interrupt ();
2907 disable_commit_resumed
.reset_and_commit ();
2911 Stop the execution of the target while running in async mode, in
2912 the background. In all-stop, stop the whole process. In non-stop
2913 mode, stop the current thread only by default, or stop all threads
2914 if the `-a' switch is used. */
2917 interrupt_command (const char *args
, int from_tty
)
2919 if (target_can_async_p ())
2921 int all_threads
= 0;
2923 dont_repeat (); /* Not for the faint of heart. */
2926 && startswith (args
, "-a"))
2929 interrupt_target_1 (all_threads
);
2933 /* See inferior.h. */
2936 default_print_float_info (struct gdbarch
*gdbarch
, struct ui_file
*file
,
2937 const frame_info_ptr
&frame
, const char *args
)
2940 int printed_something
= 0;
2942 for (regnum
= 0; regnum
< gdbarch_num_cooked_regs (gdbarch
); regnum
++)
2944 if (gdbarch_register_reggroup_p (gdbarch
, regnum
, float_reggroup
))
2946 printed_something
= 1;
2947 gdbarch_print_registers_info (gdbarch
, file
, frame
, regnum
, 1);
2950 if (!printed_something
)
2951 gdb_printf (file
, "No floating-point info "
2952 "available for this processor.\n");
2956 info_float_command (const char *args
, int from_tty
)
2958 frame_info_ptr frame
;
2960 if (!target_has_registers ())
2961 error (_("The program has no registers now."));
2963 frame
= get_selected_frame (nullptr);
2964 gdbarch_print_float_info (get_frame_arch (frame
), gdb_stdout
, frame
, args
);
2967 /* Implement `info proc' family of commands. */
2970 info_proc_cmd_1 (const char *args
, enum info_proc_what what
, int from_tty
)
2972 struct gdbarch
*gdbarch
= get_current_arch ();
2974 if (!target_info_proc (args
, what
))
2976 if (gdbarch_info_proc_p (gdbarch
))
2977 gdbarch_info_proc (gdbarch
, args
, what
);
2979 error (_("Not supported on this target."));
2983 /* Implement `info proc' when given without any further parameters. */
2986 info_proc_cmd (const char *args
, int from_tty
)
2988 info_proc_cmd_1 (args
, IP_MINIMAL
, from_tty
);
2991 /* Implement `info proc mappings'. */
2994 info_proc_cmd_mappings (const char *args
, int from_tty
)
2996 info_proc_cmd_1 (args
, IP_MAPPINGS
, from_tty
);
2999 /* Implement `info proc stat'. */
3002 info_proc_cmd_stat (const char *args
, int from_tty
)
3004 info_proc_cmd_1 (args
, IP_STAT
, from_tty
);
3007 /* Implement `info proc status'. */
3010 info_proc_cmd_status (const char *args
, int from_tty
)
3012 info_proc_cmd_1 (args
, IP_STATUS
, from_tty
);
3015 /* Implement `info proc cwd'. */
3018 info_proc_cmd_cwd (const char *args
, int from_tty
)
3020 info_proc_cmd_1 (args
, IP_CWD
, from_tty
);
3023 /* Implement `info proc cmdline'. */
3026 info_proc_cmd_cmdline (const char *args
, int from_tty
)
3028 info_proc_cmd_1 (args
, IP_CMDLINE
, from_tty
);
3031 /* Implement `info proc exe'. */
3034 info_proc_cmd_exe (const char *args
, int from_tty
)
3036 info_proc_cmd_1 (args
, IP_EXE
, from_tty
);
3039 /* Implement `info proc files'. */
3042 info_proc_cmd_files (const char *args
, int from_tty
)
3044 info_proc_cmd_1 (args
, IP_FILES
, from_tty
);
3047 /* Implement `info proc all'. */
3050 info_proc_cmd_all (const char *args
, int from_tty
)
3052 info_proc_cmd_1 (args
, IP_ALL
, from_tty
);
3055 /* Implement `show print finish'. */
3058 show_print_finish (struct ui_file
*file
, int from_tty
,
3059 struct cmd_list_element
*c
,
3062 gdb_printf (file
, _("\
3063 Printing of return value after `finish' is %s.\n"),
3068 /* This help string is used for the run, start, and starti commands.
3069 It is defined as a macro to prevent duplication. */
3071 #define RUN_ARGS_HELP \
3072 "You may specify arguments to give it.\n\
3073 Args may include \"*\", or \"[...]\"; they are expanded using the\n\
3074 shell that will start the program (specified by the \"$SHELL\" environment\n\
3075 variable). Input and output redirection with \">\", \"<\", or \">>\"\n\
3076 are also allowed.\n\
3078 With no arguments, uses arguments last specified (with \"run\" or\n\
3079 \"set args\"). To cancel previous arguments and run with no arguments,\n\
3080 use \"set args\" without arguments.\n\
3082 To start the inferior without using a shell, use \"set startup-with-shell off\"."
3084 INIT_GDB_FILE (infcmd
)
3086 static struct cmd_list_element
*info_proc_cmdlist
;
3087 struct cmd_list_element
*c
= nullptr;
3089 /* Add the filename of the terminal connected to inferior I/O. */
3091 = add_setshow_optional_filename_cmd ("inferior-tty", class_run
, _("\
3092 Set terminal for future runs of program being debugged."), _("\
3093 Show terminal for future runs of program being debugged."), _("\
3094 Usage: set inferior-tty [TTY]\n\n\
3095 If TTY is omitted, the default behavior of using the same terminal as GDB\n\
3099 show_inferior_tty_command
,
3100 &setlist
, &showlist
);
3101 add_alias_cmd ("tty", tty_set_show
.set
, class_run
, 0, &cmdlist
);
3104 = add_setshow_string_noescape_cmd ("args", class_run
, _("\
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."),
3111 &setlist
, &showlist
);
3112 set_cmd_completer (args_set_show
.set
, deprecated_filename_completer
);
3115 = add_setshow_string_noescape_cmd ("cwd", class_run
, _("\
3116 Set the current working directory to be used when the inferior is started.\n\
3117 Changing this setting does not have any effect on inferiors that are\n\
3120 Show the current working directory that is used when the inferior is started."),
3122 Use this command to change the current working directory that will be used\n\
3123 when the inferior is started. This setting does not affect GDB's current\n\
3124 working directory."),
3125 set_cwd_value
, get_inferior_cwd
,
3127 &setlist
, &showlist
);
3128 set_cmd_completer (cwd_set_show
.set
, deprecated_filename_completer
);
3130 c
= add_cmd ("environment", no_class
, environment_info
, _("\
3131 The environment to give the program, or one variable's value.\n\
3132 With an argument VAR, prints the value of environment variable VAR to\n\
3133 give the program being debugged. With no arguments, prints the entire\n\
3134 environment to be given to the program."), &showlist
);
3135 set_cmd_completer (c
, noop_completer
);
3137 add_basic_prefix_cmd ("unset", no_class
,
3138 _("Complement to certain \"set\" commands."),
3139 &unsetlist
, 0, &cmdlist
);
3141 c
= add_cmd ("environment", class_run
, unset_environment_command
, _("\
3142 Cancel environment variable VAR for the program.\n\
3143 This does not affect the program until the next \"run\" command."),
3145 set_cmd_completer (c
, noop_completer
);
3147 c
= add_cmd ("environment", class_run
, set_environment_command
, _("\
3148 Set environment variable value to give the program.\n\
3149 Arguments are VAR VALUE where VAR is variable name and VALUE is value.\n\
3150 VALUES of environment variables are uninterpreted strings.\n\
3151 This does not affect the program until the next \"run\" command."),
3153 set_cmd_completer (c
, noop_completer
);
3155 c
= add_com ("path", class_files
, path_command
, _("\
3156 Add directory DIR(s) to beginning of search path for object files.\n\
3157 $cwd in the path means the current working directory.\n\
3158 This path is equivalent to the $PATH shell variable. It is a list of\n\
3159 directories, separated by colons. These directories are searched to find\n\
3160 fully linked executable files and separately compiled object files as \
3162 set_cmd_completer (c
, deprecated_filename_completer
);
3164 c
= add_cmd ("paths", no_class
, path_info
, _("\
3165 Current search path for finding object files.\n\
3166 $cwd in the path means the current working directory.\n\
3167 This path is equivalent to the $PATH shell variable. It is a list of\n\
3168 directories, separated by colons. These directories are searched to find\n\
3169 fully linked executable files and separately compiled object files as \
3172 set_cmd_completer (c
, noop_completer
);
3174 add_prefix_cmd ("kill", class_run
, kill_command
,
3175 _("Kill execution of program being debugged."),
3176 &killlist
, 0, &cmdlist
);
3178 add_com ("attach", class_run
, attach_command
, _("\
3179 Attach to a process or file outside of GDB.\n\
3180 This command attaches to another target, of the same type as your last\n\
3181 \"target\" command (\"info files\" will show your target stack).\n\
3182 The command may take as argument a process id or a device file.\n\
3183 For a process id, you must have permission to send the process a signal,\n\
3184 and it must have the same effective uid as the debugger.\n\
3185 When using \"attach\" with a process id, the debugger finds the\n\
3186 program running in the process, looking first in the current working\n\
3187 directory, or (if not found there) using the source file search path\n\
3188 (see the \"directory\" command). You can also use the \"file\" command\n\
3189 to specify the program, and to load its symbol table."));
3191 add_prefix_cmd ("detach", class_run
, detach_command
, _("\
3192 Detach a process or file previously attached.\n\
3193 If a process, it is no longer traced, and it continues its execution. If\n\
3194 you were debugging a file, the file is closed and gdb no longer accesses it."),
3195 &detachlist
, 0, &cmdlist
);
3197 add_com ("disconnect", class_run
, disconnect_command
, _("\
3198 Disconnect from a target.\n\
3199 The target will wait for another debugger to connect. Not available for\n\
3202 c
= add_com ("signal", class_run
, signal_command
, _("\
3203 Continue program with the specified signal.\n\
3204 Usage: signal SIGNAL\n\
3205 The SIGNAL argument is processed the same as the handle command.\n\
3207 An argument of \"0\" means continue the program without sending it a signal.\n\
3208 This is useful in cases where the program stopped because of a signal,\n\
3209 and you want to resume the program while discarding the signal.\n\
3211 In a multi-threaded program the signal is delivered to, or discarded from,\n\
3212 the current thread only."));
3213 set_cmd_completer (c
, signal_completer
);
3215 c
= add_com ("queue-signal", class_run
, queue_signal_command
, _("\
3216 Queue a signal to be delivered to the current thread when it is resumed.\n\
3217 Usage: queue-signal SIGNAL\n\
3218 The SIGNAL argument is processed the same as the handle command.\n\
3219 It is an error if the handling state of SIGNAL is \"nopass\".\n\
3221 An argument of \"0\" means remove any currently queued signal from\n\
3222 the current thread. This is useful in cases where the program stopped\n\
3223 because of a signal, and you want to resume it while discarding the signal.\n\
3225 In a multi-threaded program the signal is queued with, or discarded from,\n\
3226 the current thread only."));
3227 set_cmd_completer (c
, signal_completer
);
3229 cmd_list_element
*stepi_cmd
3230 = add_com ("stepi", class_run
, stepi_command
, _("\
3231 Step one instruction exactly.\n\
3233 Argument N means step N times (or till program stops for another \
3235 add_com_alias ("si", stepi_cmd
, class_run
, 0);
3237 cmd_list_element
*nexti_cmd
3238 = add_com ("nexti", class_run
, nexti_command
, _("\
3239 Step one instruction, but proceed through subroutine calls.\n\
3241 Argument N means step N times (or till program stops for another \
3243 add_com_alias ("ni", nexti_cmd
, class_run
, 0);
3245 cmd_list_element
*finish_cmd
3246 = add_com ("finish", class_run
, finish_command
, _("\
3247 Execute until selected stack frame returns.\n\
3249 Upon return, the value returned is printed and put in the value history."));
3250 add_com_alias ("fin", finish_cmd
, class_run
, 1);
3252 cmd_list_element
*next_cmd
3253 = add_com ("next", class_run
, next_command
, _("\
3254 Step program, proceeding through subroutine calls.\n\
3256 Unlike \"step\", if the current source line calls a subroutine,\n\
3257 this command does not enter the subroutine, but instead steps over\n\
3258 the call, in effect treating it as a single source line."));
3259 add_com_alias ("n", next_cmd
, class_run
, 1);
3261 cmd_list_element
*step_cmd
3262 = add_com ("step", class_run
, step_command
, _("\
3263 Step program until it reaches a different source line.\n\
3265 Argument N means step N times (or till program stops for another \
3267 add_com_alias ("s", step_cmd
, class_run
, 1);
3269 cmd_list_element
*until_cmd
3270 = add_com ("until", class_run
, until_command
, _("\
3271 Execute until past the current line or past a LOCATION.\n\
3272 Execute until the program reaches a source line greater than the current\n\
3273 or a specified location (same args as break command) within the current \
3275 set_cmd_completer (until_cmd
, location_completer
);
3276 add_com_alias ("u", until_cmd
, class_run
, 1);
3278 c
= add_com ("advance", class_run
, advance_command
, _("\
3279 Continue the program up to the given location.\n\
3280 Usage: advance LOCSPEC\n\
3281 The argument is a location specification, i.e., the same forms\n\
3282 accepted by the 'break' command.\n\
3283 Execution will also stop upon exit from the current stack frame."));
3284 set_cmd_completer (c
, location_completer
);
3286 cmd_list_element
*jump_cmd
3287 = add_com ("jump", class_run
, jump_command
, _("\
3288 Continue program being debugged at specified line or address.\n\
3289 Usage: jump LOCATION\n\
3290 Give as argument either LINENUM or *ADDR, where ADDR is an expression\n\
3291 for an address to start at."));
3292 set_cmd_completer (jump_cmd
, location_completer
);
3293 add_com_alias ("j", jump_cmd
, class_run
, 1);
3295 cmd_list_element
*continue_cmd
3296 = add_com ("continue", class_run
, continue_command
, _("\
3297 Continue program being debugged, after signal or breakpoint.\n\
3298 Usage: continue [N]\n\
3299 If proceeding from breakpoint, a number N may be used as an argument,\n\
3300 which means to set the ignore count of that breakpoint to N - 1 (so that\n\
3301 the breakpoint won't break until the Nth time it is reached).\n\
3303 If non-stop mode is enabled, continue only the current thread,\n\
3304 otherwise all the threads in the program are continued. To\n\
3305 continue all stopped threads in non-stop mode, use the -a option.\n\
3306 Specifying -a and an ignore count simultaneously is an error."));
3307 add_com_alias ("c", continue_cmd
, class_run
, 1);
3308 add_com_alias ("fg", continue_cmd
, class_run
, 1);
3310 cmd_list_element
*run_cmd
3311 = add_com ("run", class_run
, run_command
, _("\
3312 Start debugged program.\n"
3314 set_cmd_completer (run_cmd
, deprecated_filename_completer
);
3315 add_com_alias ("r", run_cmd
, class_run
, 1);
3317 c
= add_com ("start", class_run
, start_command
, _("\
3318 Start the debugged program stopping at the beginning of the main procedure.\n"
3320 set_cmd_completer (c
, deprecated_filename_completer
);
3322 c
= add_com ("starti", class_run
, starti_command
, _("\
3323 Start the debugged program stopping at the first instruction.\n"
3325 set_cmd_completer (c
, deprecated_filename_completer
);
3327 add_com ("interrupt", class_run
, interrupt_command
,
3328 _("Interrupt the execution of the debugged program.\n\
3329 If non-stop mode is enabled, interrupt only the current thread,\n\
3330 otherwise all the threads in the program are stopped. To\n\
3331 interrupt all running threads in non-stop mode, use the -a option."));
3333 cmd_list_element
*info_registers_cmd
3334 = add_info ("registers", info_registers_command
, _("\
3335 List of integer registers and their contents, for selected stack frame.\n\
3336 One or more register names as argument means describe the given registers.\n\
3337 One or more register group names as argument means describe the registers\n\
3338 in the named register groups."));
3339 add_info_alias ("r", info_registers_cmd
, 1);
3340 set_cmd_completer (info_registers_cmd
, reg_or_group_completer
);
3342 c
= add_info ("all-registers", info_all_registers_command
, _("\
3343 List of all registers and their contents, for selected stack frame.\n\
3344 One or more register names as argument means describe the given registers.\n\
3345 One or more register group names as argument means describe the registers\n\
3346 in the named register groups."));
3347 set_cmd_completer (c
, reg_or_group_completer
);
3349 add_info ("program", info_program_command
,
3350 _("Execution status of the program."));
3352 add_info ("float", info_float_command
,
3353 _("Print the status of the floating point unit."));
3355 add_info ("vector", info_vector_command
,
3356 _("Print the status of the vector unit."));
3358 add_prefix_cmd ("proc", class_info
, info_proc_cmd
,
3360 Show additional information about a process.\n\
3361 Specify any process id, or use the program being debugged by default."),
3363 1/*allow-unknown*/, &infolist
);
3365 add_cmd ("mappings", class_info
, info_proc_cmd_mappings
, _("\
3366 List memory regions mapped by the specified process."),
3367 &info_proc_cmdlist
);
3369 add_cmd ("stat", class_info
, info_proc_cmd_stat
, _("\
3370 List process info from /proc/PID/stat."),
3371 &info_proc_cmdlist
);
3373 add_cmd ("status", class_info
, info_proc_cmd_status
, _("\
3374 List process info from /proc/PID/status."),
3375 &info_proc_cmdlist
);
3377 add_cmd ("cwd", class_info
, info_proc_cmd_cwd
, _("\
3378 List current working directory of the specified process."),
3379 &info_proc_cmdlist
);
3381 add_cmd ("cmdline", class_info
, info_proc_cmd_cmdline
, _("\
3382 List command line arguments of the specified process."),
3383 &info_proc_cmdlist
);
3385 add_cmd ("exe", class_info
, info_proc_cmd_exe
, _("\
3386 List absolute filename for executable of the specified process."),
3387 &info_proc_cmdlist
);
3389 add_cmd ("files", class_info
, info_proc_cmd_files
, _("\
3390 List files opened by the specified process."),
3391 &info_proc_cmdlist
);
3393 add_cmd ("all", class_info
, info_proc_cmd_all
, _("\
3394 List all available info about the specified process."),
3395 &info_proc_cmdlist
);
3397 add_setshow_boolean_cmd ("finish", class_support
,
3399 Set whether `finish' prints the return value."), _("\
3400 Show whether `finish' prints the return value."), nullptr,
3403 &setprintlist
, &showprintlist
);