1 /* Memory-access and commands for "inferior" process, for GDB.
3 Copyright (C) 1986-2021 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
21 #include "arch-utils.h"
27 #include "gdbsupport/environ.h"
35 #include "completer.h"
38 #include "reggroups.h"
42 #include "observable.h"
43 #include "target-descriptions.h"
44 #include "user-regs.h"
45 #include "gdbthread.h"
47 #include "inline-frame.h"
48 #include "tracepoint.h"
50 #include "continuations.h"
52 #include "thread-fsm.h"
56 #include "gdbsupport/gdb_optional.h"
58 #include "cli/cli-style.h"
60 /* Local functions: */
62 static void until_next_command (int);
64 static void step_1 (int, int, const char *);
66 #define ERROR_NO_INFERIOR \
67 if (!target_has_execution ()) error (_("The program is not being run."));
69 /* Scratch area where string containing arguments to give to the
70 program will be stored by 'set args'. As soon as anything is
71 stored, notice_args_set will move it into per-inferior storage.
72 Arguments are separated by spaces. Empty string (pointer to '\0')
75 static char *inferior_args_scratch
;
77 /* Scratch area where the new cwd will be stored by 'set cwd'. */
79 static char *inferior_cwd_scratch
;
81 /* Scratch area where 'set inferior-tty' will store user-provided value.
82 We'll immediate copy it into per-inferior storage. */
84 static char *inferior_io_terminal_scratch
;
86 /* Pid of our debugged inferior, or 0 if no inferior now.
87 Since various parts of infrun.c test this to see whether there is a program
88 being debugged it should be nonzero (currently 3 is used) for remote
93 /* Nonzero if stopped due to completion of a stack dummy routine. */
95 enum stop_stack_kind stop_stack_dummy
;
97 /* Nonzero if stopped due to a random (unexpected) signal in inferior
100 int stopped_by_random_signal
;
105 set_inferior_tty_command (const char *args
, int from_tty
,
106 struct cmd_list_element
*c
)
108 /* CLI has assigned the user-provided value to inferior_io_terminal_scratch.
109 Now route it to current inferior. */
110 current_inferior ()->set_tty (inferior_io_terminal_scratch
);
114 show_inferior_tty_command (struct ui_file
*file
, int from_tty
,
115 struct cmd_list_element
*c
, const char *value
)
117 /* Note that we ignore the passed-in value in favor of computing it
119 const char *inferior_tty
= current_inferior ()->tty ();
121 if (inferior_tty
== nullptr)
123 fprintf_filtered (gdb_stdout
,
124 _("Terminal for future runs of program being debugged "
125 "is \"%s\".\n"), inferior_tty
);
129 get_inferior_args (void)
131 if (current_inferior ()->argc
!= 0)
133 gdb::array_view
<char * const> args (current_inferior ()->argv
,
134 current_inferior ()->argc
);
135 std::string n
= construct_inferior_arguments (args
);
136 set_inferior_args (n
.c_str ());
139 if (current_inferior ()->args
== NULL
)
140 current_inferior ()->args
= xstrdup ("");
142 return current_inferior ()->args
;
145 /* Set the arguments for the current inferior. Ownership of
146 NEWARGS is not transferred. */
149 set_inferior_args (const char *newargs
)
151 xfree (current_inferior ()->args
);
152 current_inferior ()->args
= newargs
? xstrdup (newargs
) : NULL
;
153 current_inferior ()->argc
= 0;
154 current_inferior ()->argv
= 0;
158 set_inferior_args_vector (int argc
, char **argv
)
160 current_inferior ()->argc
= argc
;
161 current_inferior ()->argv
= argv
;
164 /* Notice when `set args' is run. */
167 set_args_command (const char *args
, int from_tty
, struct cmd_list_element
*c
)
169 /* CLI has assigned the user-provided value to inferior_args_scratch.
170 Now route it to current inferior. */
171 set_inferior_args (inferior_args_scratch
);
174 /* Notice when `show args' is run. */
177 show_args_command (struct ui_file
*file
, int from_tty
,
178 struct cmd_list_element
*c
, const char *value
)
180 /* Note that we ignore the passed-in value in favor of computing it
182 deprecated_show_value_hack (file
, from_tty
, c
, get_inferior_args ());
185 /* See gdbsupport/common-inferior.h. */
188 set_inferior_cwd (const char *cwd
)
190 struct inferior
*inf
= current_inferior ();
192 gdb_assert (inf
!= NULL
);
197 inf
->cwd
.reset (xstrdup (cwd
));
200 /* See gdbsupport/common-inferior.h. */
205 return current_inferior ()->cwd
.get ();
208 /* Handle the 'set cwd' command. */
211 set_cwd_command (const char *args
, int from_tty
, struct cmd_list_element
*c
)
213 if (*inferior_cwd_scratch
== '\0')
214 set_inferior_cwd (NULL
);
216 set_inferior_cwd (inferior_cwd_scratch
);
219 /* Handle the 'show cwd' command. */
222 show_cwd_command (struct ui_file
*file
, int from_tty
,
223 struct cmd_list_element
*c
, const char *value
)
225 const char *cwd
= get_inferior_cwd ();
228 fprintf_filtered (gdb_stdout
,
230 You have not set the inferior's current working directory.\n\
231 The inferior will inherit GDB's cwd if native debugging, or the remote\n\
232 server's cwd if remote debugging.\n"));
234 fprintf_filtered (gdb_stdout
,
235 _("Current working directory that will be used "
236 "when starting the inferior is \"%s\".\n"), cwd
);
240 /* This function strips the '&' character (indicating background
241 execution) that is added as *the last* of the arguments ARGS of a
242 command. A copy of the incoming ARGS without the '&' is returned,
243 unless the resulting string after stripping is empty, in which case
244 NULL is returned. *BG_CHAR_P is an output boolean that indicates
245 whether the '&' character was found. */
247 static gdb::unique_xmalloc_ptr
<char>
248 strip_bg_char (const char *args
, int *bg_char_p
)
252 if (args
== NULL
|| *args
== '\0')
258 p
= args
+ strlen (args
);
262 while (p
> args
&& isspace (p
[-1]))
267 return gdb::unique_xmalloc_ptr
<char>
268 (savestring (args
, p
- args
));
270 return gdb::unique_xmalloc_ptr
<char> (nullptr);
274 return make_unique_xstrdup (args
);
277 /* Common actions to take after creating any sort of inferior, by any
278 means (running, attaching, connecting, et cetera). The target
279 should be stopped. */
282 post_create_inferior (int from_tty
)
285 /* Be sure we own the terminal in case write operations are performed. */
286 target_terminal::ours_for_output ();
288 /* If the target hasn't taken care of this already, do it now.
289 Targets which need to access registers during to_open,
290 to_create_inferior, or to_attach should do it earlier; but many
292 target_find_description ();
294 /* Now that we know the register layout, retrieve current PC. But
295 if the PC is unavailable (e.g., we're opening a core file with
296 missing registers info), ignore it. */
297 thread_info
*thr
= inferior_thread ();
299 thr
->suspend
.stop_pc
= 0;
302 regcache
*rc
= get_thread_regcache (thr
);
303 thr
->suspend
.stop_pc
= regcache_read_pc (rc
);
305 catch (const gdb_exception_error
&ex
)
307 if (ex
.error
!= NOT_AVAILABLE_ERROR
)
311 if (current_program_space
->exec_bfd ())
313 const unsigned solib_add_generation
314 = current_program_space
->solib_add_generation
;
316 /* Create the hooks to handle shared library load and unload
318 solib_create_inferior_hook (from_tty
);
320 if (current_program_space
->solib_add_generation
== solib_add_generation
)
322 /* The platform-specific hook should load initial shared libraries,
323 but didn't. FROM_TTY will be incorrectly 0 but such solib
324 targets should be fixed anyway. Call it only after the solib
325 target has been initialized by solib_create_inferior_hook. */
328 warning (_("platform-specific solib_create_inferior_hook did "
329 "not load initial shared libraries."));
331 /* If the solist is global across processes, there's no need to
333 if (!gdbarch_has_global_solist (target_gdbarch ()))
334 solib_add (NULL
, 0, auto_solib_add
);
338 /* If the user sets watchpoints before execution having started,
339 then she gets software watchpoints, because GDB can't know which
340 target will end up being pushed, or if it supports hardware
341 watchpoints or not. breakpoint_re_set takes care of promoting
342 watchpoints to hardware watchpoints if possible, however, if this
343 new inferior doesn't load shared libraries or we don't pull in
344 symbols from any other source on this target/arch,
345 breakpoint_re_set is never called. Call it now so that software
346 watchpoints get a chance to be promoted to hardware watchpoints
347 if the now pushed target supports hardware watchpoints. */
348 breakpoint_re_set ();
350 gdb::observers::inferior_created
.notify (current_inferior ());
353 /* Kill the inferior if already running. This function is designed
354 to be called when we are about to start the execution of the program
355 from the beginning. Ask the user to confirm that he wants to restart
356 the program being debugged when FROM_TTY is non-null. */
359 kill_if_already_running (int from_tty
)
361 if (inferior_ptid
!= null_ptid
&& target_has_execution ())
363 /* Bail out before killing the program if we will not be able to
365 target_require_runnable ();
368 && !query (_("The program being debugged has been started already.\n\
369 Start it from the beginning? ")))
370 error (_("Program not restarted."));
375 /* See inferior.h. */
378 prepare_execution_command (struct target_ops
*target
, int background
)
380 /* If we get a request for running in the bg but the target
381 doesn't support it, error out. */
382 if (background
&& !target
->can_async_p ())
383 error (_("Asynchronous execution not supported on this target."));
387 /* If we get a request for running in the fg, then we need to
388 simulate synchronous (fg) execution. Note no cleanup is
389 necessary for this. stdin is re-enabled whenever an error
390 reaches the top level. */
391 all_uis_on_sync_execution_starting ();
395 /* Determine how the new inferior will behave. */
399 /* Run program without any explicit stop during startup. */
402 /* Stop at the beginning of the program's main function. */
405 /* Stop at the first instruction of the program. */
406 RUN_STOP_AT_FIRST_INSN
409 /* Implement the "run" command. Force a stop during program start if
410 requested by RUN_HOW. */
413 run_command_1 (const char *args
, int from_tty
, enum run_how run_how
)
415 const char *exec_file
;
416 struct ui_out
*uiout
= current_uiout
;
417 struct target_ops
*run_target
;
422 scoped_disable_commit_resumed
disable_commit_resumed ("running");
424 kill_if_already_running (from_tty
);
426 init_wait_for_inferior ();
427 clear_breakpoint_hit_counts ();
429 /* Clean up any leftovers from other runs. Some other things from
430 this function should probably be moved into target_pre_inferior. */
431 target_pre_inferior (from_tty
);
433 /* The comment here used to read, "The exec file is re-read every
434 time we do a generic_mourn_inferior, so we just have to worry
435 about the symbol file." The `generic_mourn_inferior' function
436 gets called whenever the program exits. However, suppose the
437 program exits, and *then* the executable file changes? We need
438 to check again here. Since reopen_exec_file doesn't do anything
439 if the timestamp hasn't changed, I don't see the harm. */
443 gdb::unique_xmalloc_ptr
<char> stripped
= strip_bg_char (args
, &async_exec
);
444 args
= stripped
.get ();
446 /* Do validation and preparation before possibly changing anything
449 run_target
= find_run_target ();
451 prepare_execution_command (run_target
, async_exec
);
453 if (non_stop
&& !run_target
->supports_non_stop ())
454 error (_("The target does not support running in non-stop mode."));
456 /* Done. Can now set breakpoints, change inferior args, etc. */
458 /* Insert temporary breakpoint in main function if requested. */
459 if (run_how
== RUN_STOP_AT_MAIN
)
461 std::string arg
= string_printf ("-qualified %s", main_name ());
462 tbreak_command (arg
.c_str (), 0);
465 exec_file
= get_exec_file (0);
467 /* We keep symbols from add-symbol-file, on the grounds that the
468 user might want to add some symbols before running the program
469 (right?). But sometimes (dynamic loading where the user manually
470 introduces the new symbols with add-symbol-file), the code which
471 the symbols describe does not persist between runs. Currently
472 the user has to manually nuke all symbols between runs if they
473 want them to go away (PR 2207). This is probably reasonable. */
475 /* If there were other args, beside '&', process them. */
477 set_inferior_args (args
);
481 uiout
->field_string (NULL
, "Starting program");
484 uiout
->field_string ("execfile", exec_file
);
486 /* We call get_inferior_args() because we might need to compute
488 uiout
->field_string ("infargs", get_inferior_args ());
493 /* We call get_inferior_args() because we might need to compute
495 run_target
->create_inferior (exec_file
,
496 std::string (get_inferior_args ()),
497 current_inferior ()->environment
.envp (),
499 /* to_create_inferior should push the target, so after this point we
500 shouldn't refer to run_target again. */
503 /* We're starting off a new process. When we get out of here, in
504 non-stop mode, finish the state of all threads of that process,
505 but leave other threads alone, as they may be stopped in internal
506 events --- the frontend shouldn't see them as stopped. In
507 all-stop, always finish the state of all threads, as we may be
508 resuming more than just the new process. */
509 process_stratum_target
*finish_target
;
513 finish_target
= current_inferior ()->process_target ();
514 finish_ptid
= ptid_t (current_inferior ()->pid
);
518 finish_target
= nullptr;
519 finish_ptid
= minus_one_ptid
;
521 scoped_finish_thread_state
finish_state (finish_target
, finish_ptid
);
523 /* Pass zero for FROM_TTY, because at this point the "run" command
524 has done its thing; now we are setting up the running program. */
525 post_create_inferior (0);
527 /* Queue a pending event so that the program stops immediately. */
528 if (run_how
== RUN_STOP_AT_FIRST_INSN
)
530 thread_info
*thr
= inferior_thread ();
531 thr
->suspend
.waitstatus_pending_p
= 1;
532 thr
->suspend
.waitstatus
.kind
= TARGET_WAITKIND_STOPPED
;
533 thr
->suspend
.waitstatus
.value
.sig
= GDB_SIGNAL_0
;
536 /* Start the target running. Do not use -1 continuation as it would skip
537 breakpoint right at the entry point. */
538 proceed (regcache_read_pc (get_current_regcache ()), GDB_SIGNAL_0
);
540 /* Since there was no error, there's no need to finish the thread
542 finish_state
.release ();
544 disable_commit_resumed
.reset_and_commit ();
548 run_command (const char *args
, int from_tty
)
550 run_command_1 (args
, from_tty
, RUN_NORMAL
);
553 /* Start the execution of the program up until the beginning of the main
557 start_command (const char *args
, int from_tty
)
559 /* Some languages such as Ada need to search inside the program
560 minimal symbols for the location where to put the temporary
561 breakpoint before starting. */
562 if (!have_minimal_symbols ())
563 error (_("No symbol table loaded. Use the \"file\" command."));
565 /* Run the program until reaching the main procedure... */
566 run_command_1 (args
, from_tty
, RUN_STOP_AT_MAIN
);
569 /* Start the execution of the program stopping at the first
573 starti_command (const char *args
, int from_tty
)
575 run_command_1 (args
, from_tty
, RUN_STOP_AT_FIRST_INSN
);
579 proceed_thread_callback (struct thread_info
*thread
, void *arg
)
581 /* We go through all threads individually instead of compressing
582 into a single target `resume_all' request, because some threads
583 may be stopped in internal breakpoints/events, or stopped waiting
584 for its turn in the displaced stepping queue (that is, they are
585 running && !executing). The target side has no idea about why
586 the thread is stopped, so a `resume_all' command would resume too
587 much. If/when GDB gains a way to tell the target `hold this
588 thread stopped until I say otherwise', then we can optimize
590 if (thread
->state
!= THREAD_STOPPED
)
593 if (!thread
->inf
->has_execution ())
596 switch_to_thread (thread
);
597 clear_proceed_status (0);
598 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
603 ensure_valid_thread (void)
605 if (inferior_ptid
== null_ptid
606 || inferior_thread ()->state
== THREAD_EXITED
)
607 error (_("Cannot execute this command without a live selected thread."));
610 /* If the user is looking at trace frames, any resumption of execution
611 is likely to mix up recorded and live target data. So simply
612 disallow those commands. */
615 ensure_not_tfind_mode (void)
617 if (get_traceframe_number () >= 0)
618 error (_("Cannot execute this command while looking at trace frames."));
621 /* Throw an error indicating the current thread is running. */
624 error_is_running (void)
626 error (_("Cannot execute this command while "
627 "the selected thread is running."));
630 /* Calls error_is_running if the current thread is running. */
633 ensure_not_running (void)
635 if (inferior_thread ()->state
== THREAD_RUNNING
)
640 continue_1 (int all_threads
)
643 ensure_not_tfind_mode ();
645 if (non_stop
&& all_threads
)
647 /* Don't error out if the current thread is running, because
648 there may be other stopped threads. */
650 /* Backup current thread and selected frame and restore on scope
652 scoped_restore_current_thread restore_thread
;
654 iterate_over_threads (proceed_thread_callback
, NULL
);
656 if (current_ui
->prompt_state
== PROMPT_BLOCKED
)
658 /* If all threads in the target were already running,
659 proceed_thread_callback ends up never calling proceed,
660 and so nothing calls this to put the inferior's terminal
661 settings in effect and remove stdin from the event loop,
662 which we must when running a foreground command. E.g.:
666 <all threads are running now>
669 <no thread was resumed, but the inferior now owns the terminal>
671 target_terminal::inferior ();
676 ensure_valid_thread ();
677 ensure_not_running ();
678 clear_proceed_status (0);
679 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
683 /* continue [-a] [proceed-count] [&] */
686 continue_command (const char *args
, int from_tty
)
689 bool all_threads_p
= false;
693 /* Find out whether we must run in the background. */
694 gdb::unique_xmalloc_ptr
<char> stripped
= strip_bg_char (args
, &async_exec
);
695 args
= stripped
.get ();
699 if (startswith (args
, "-a"))
701 all_threads_p
= true;
702 args
+= sizeof ("-a") - 1;
708 if (!non_stop
&& all_threads_p
)
709 error (_("`-a' is meaningless in all-stop mode."));
711 if (args
!= NULL
&& all_threads_p
)
712 error (_("Can't resume all threads and specify "
713 "proceed count simultaneously."));
715 /* If we have an argument left, set proceed count of breakpoint we
722 struct thread_info
*tp
;
725 tp
= inferior_thread ();
728 process_stratum_target
*last_target
;
731 get_last_target_status (&last_target
, &last_ptid
, nullptr);
732 tp
= find_thread_ptid (last_target
, last_ptid
);
735 bs
= tp
->control
.stop_bpstat
;
737 while ((stat
= bpstat_num (&bs
, &num
)) != 0)
740 set_ignore_count (num
,
741 parse_and_eval_long (args
) - 1,
743 /* set_ignore_count prints a message ending with a period.
744 So print two spaces before "Continuing.". */
746 printf_filtered (" ");
750 if (!stopped
&& from_tty
)
753 ("Not stopped at any breakpoint; argument ignored.\n");
758 ensure_not_tfind_mode ();
760 if (!non_stop
|| !all_threads_p
)
762 ensure_valid_thread ();
763 ensure_not_running ();
766 prepare_execution_command (current_inferior ()->top_target (), async_exec
);
769 printf_filtered (_("Continuing.\n"));
771 continue_1 (all_threads_p
);
774 /* Record in TP the starting point of a "step" or "next" command. */
777 set_step_frame (thread_info
*tp
)
779 /* This can be removed once this function no longer implicitly relies on the
780 inferior_ptid value. */
781 gdb_assert (inferior_ptid
== tp
->ptid
);
783 frame_info
*frame
= get_current_frame ();
785 symtab_and_line sal
= find_frame_sal (frame
);
786 set_step_info (tp
, frame
, sal
);
788 CORE_ADDR pc
= get_frame_pc (frame
);
789 tp
->control
.step_start_function
= find_pc_function (pc
);
792 /* Step until outside of current statement. */
795 step_command (const char *count_string
, int from_tty
)
797 step_1 (0, 0, count_string
);
800 /* Likewise, but skip over subroutine calls as if single instructions. */
803 next_command (const char *count_string
, int from_tty
)
805 step_1 (1, 0, count_string
);
808 /* Likewise, but step only one instruction. */
811 stepi_command (const char *count_string
, int from_tty
)
813 step_1 (0, 1, count_string
);
817 nexti_command (const char *count_string
, int from_tty
)
819 step_1 (1, 1, count_string
);
822 /* Data for the FSM that manages the step/next/stepi/nexti
825 struct step_command_fsm
: public thread_fsm
827 /* How many steps left in a "step N"-like command. */
830 /* If true, this is a next/nexti, otherwise a step/stepi. */
831 int skip_subroutines
;
833 /* If true, this is a stepi/nexti, otherwise a step/step. */
836 explicit step_command_fsm (struct interp
*cmd_interp
)
837 : thread_fsm (cmd_interp
)
841 void clean_up (struct thread_info
*thread
) override
;
842 bool should_stop (struct thread_info
*thread
) override
;
843 enum async_reply_reason
do_async_reply_reason () override
;
846 /* Prepare for a step/next/etc. command. Any target resource
847 allocated here is undone in the FSM's clean_up method. */
850 step_command_fsm_prepare (struct step_command_fsm
*sm
,
851 int skip_subroutines
, int single_inst
,
852 int count
, struct thread_info
*thread
)
854 sm
->skip_subroutines
= skip_subroutines
;
855 sm
->single_inst
= single_inst
;
858 /* Leave the si command alone. */
859 if (!sm
->single_inst
|| sm
->skip_subroutines
)
860 set_longjmp_breakpoint (thread
, get_frame_id (get_current_frame ()));
862 thread
->control
.stepping_command
= 1;
865 static int prepare_one_step (thread_info
*, struct step_command_fsm
*sm
);
868 step_1 (int skip_subroutines
, int single_inst
, const char *count_string
)
872 struct thread_info
*thr
;
873 struct step_command_fsm
*step_sm
;
876 ensure_not_tfind_mode ();
877 ensure_valid_thread ();
878 ensure_not_running ();
880 gdb::unique_xmalloc_ptr
<char> stripped
881 = strip_bg_char (count_string
, &async_exec
);
882 count_string
= stripped
.get ();
884 prepare_execution_command (current_inferior ()->top_target (), async_exec
);
886 count
= count_string
? parse_and_eval_long (count_string
) : 1;
888 clear_proceed_status (1);
890 /* Setup the execution command state machine to handle all the COUNT
892 thr
= inferior_thread ();
893 step_sm
= new step_command_fsm (command_interp ());
894 thr
->thread_fsm
= step_sm
;
896 step_command_fsm_prepare (step_sm
, skip_subroutines
,
897 single_inst
, count
, thr
);
899 /* Do only one step for now, before returning control to the event
900 loop. Let the continuation figure out how many other steps we
901 need to do, and handle them one at the time, through
903 if (!prepare_one_step (thr
, step_sm
))
904 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
909 /* Stepped into an inline frame. Pretend that we've
911 thr
->thread_fsm
->clean_up (thr
);
912 proceeded
= normal_stop ();
914 inferior_event_handler (INF_EXEC_COMPLETE
);
915 all_uis_check_sync_execution_done ();
919 /* Implementation of the 'should_stop' FSM method for stepping
920 commands. Called after we are done with one step operation, to
921 check whether we need to step again, before we print the prompt and
922 return control to the user. If count is > 1, returns false, as we
923 will need to keep going. */
926 step_command_fsm::should_stop (struct thread_info
*tp
)
928 if (tp
->control
.stop_step
)
930 /* There are more steps to make, and we did stop due to
931 ending a stepping range. Do another step. */
933 return prepare_one_step (tp
, this);
941 /* Implementation of the 'clean_up' FSM method for stepping commands. */
944 step_command_fsm::clean_up (struct thread_info
*thread
)
946 if (!single_inst
|| skip_subroutines
)
947 delete_longjmp_breakpoint (thread
->global_num
);
950 /* Implementation of the 'async_reply_reason' FSM method for stepping
953 enum async_reply_reason
954 step_command_fsm::do_async_reply_reason ()
956 return EXEC_ASYNC_END_STEPPING_RANGE
;
959 /* Prepare for one step in "step N". The actual target resumption is
960 done by the caller. Return true if we're done and should thus
961 report a stop to the user. Returns false if the target needs to be
965 prepare_one_step (thread_info
*tp
, struct step_command_fsm
*sm
)
967 /* This can be removed once this function no longer implicitly relies on the
968 inferior_ptid value. */
969 gdb_assert (inferior_ptid
== tp
->ptid
);
973 struct frame_info
*frame
= get_current_frame ();
977 if (!sm
->single_inst
)
981 /* Step at an inlined function behaves like "down". */
982 if (!sm
->skip_subroutines
983 && inline_skipped_frames (tp
))
986 const char *fn
= NULL
;
990 /* Pretend that we've ran. */
991 resume_ptid
= user_visible_resume_ptid (1);
992 set_running (tp
->inf
->process_target (), resume_ptid
, true);
994 step_into_inline_frame (tp
);
996 frame
= get_current_frame ();
997 sal
= find_frame_sal (frame
);
998 sym
= get_frame_function (frame
);
1001 fn
= sym
->print_name ();
1004 || !function_name_is_marked_for_skip (fn
, sal
))
1007 return prepare_one_step (tp
, sm
);
1011 pc
= get_frame_pc (frame
);
1012 find_pc_line_pc_range (pc
,
1013 &tp
->control
.step_range_start
,
1014 &tp
->control
.step_range_end
);
1016 tp
->control
.may_range_step
= 1;
1018 /* If we have no line info, switch to stepi mode. */
1019 if (tp
->control
.step_range_end
== 0 && step_stop_if_no_debug
)
1021 tp
->control
.step_range_start
= tp
->control
.step_range_end
= 1;
1022 tp
->control
.may_range_step
= 0;
1024 else if (tp
->control
.step_range_end
== 0)
1028 if (find_pc_partial_function (pc
, &name
,
1029 &tp
->control
.step_range_start
,
1030 &tp
->control
.step_range_end
) == 0)
1031 error (_("Cannot find bounds of current function"));
1033 target_terminal::ours_for_output ();
1034 printf_filtered (_("Single stepping until exit from function %s,"
1035 "\nwhich has no line number information.\n"),
1041 /* Say we are stepping, but stop after one insn whatever it does. */
1042 tp
->control
.step_range_start
= tp
->control
.step_range_end
= 1;
1043 if (!sm
->skip_subroutines
)
1045 Don't step over function calls, not even to functions lacking
1047 tp
->control
.step_over_calls
= STEP_OVER_NONE
;
1050 if (sm
->skip_subroutines
)
1051 tp
->control
.step_over_calls
= STEP_OVER_ALL
;
1057 sm
->set_finished ();
1062 /* Continue program at specified address. */
1065 jump_command (const char *arg
, int from_tty
)
1067 struct gdbarch
*gdbarch
= get_current_arch ();
1074 ensure_not_tfind_mode ();
1075 ensure_valid_thread ();
1076 ensure_not_running ();
1078 /* Find out whether we must run in the background. */
1079 gdb::unique_xmalloc_ptr
<char> stripped
= strip_bg_char (arg
, &async_exec
);
1080 arg
= stripped
.get ();
1082 prepare_execution_command (current_inferior ()->top_target (), async_exec
);
1085 error_no_arg (_("starting address"));
1087 std::vector
<symtab_and_line
> sals
1088 = decode_line_with_last_displayed (arg
, DECODE_LINE_FUNFIRSTLINE
);
1089 if (sals
.size () != 1)
1090 error (_("Unreasonable jump request"));
1092 symtab_and_line
&sal
= sals
[0];
1094 if (sal
.symtab
== 0 && sal
.pc
== 0)
1095 error (_("No source file has been specified."));
1097 resolve_sal_pc (&sal
); /* May error out. */
1099 /* See if we are trying to jump to another function. */
1100 fn
= get_frame_function (get_current_frame ());
1101 sfn
= find_pc_function (sal
.pc
);
1102 if (fn
!= NULL
&& sfn
!= fn
)
1104 if (!query (_("Line %d is not in `%s'. Jump anyway? "), sal
.line
,
1107 error (_("Not confirmed."));
1114 struct obj_section
*section
;
1116 fixup_symbol_section (sfn
, 0);
1117 section
= sfn
->obj_section (symbol_objfile (sfn
));
1118 if (section_is_overlay (section
)
1119 && !section_is_mapped (section
))
1121 if (!query (_("WARNING!!! Destination is in "
1122 "unmapped overlay! Jump anyway? ")))
1124 error (_("Not confirmed."));
1134 printf_filtered (_("Continuing at "));
1135 fputs_filtered (paddress (gdbarch
, addr
), gdb_stdout
);
1136 printf_filtered (".\n");
1139 clear_proceed_status (0);
1140 proceed (addr
, GDB_SIGNAL_0
);
1143 /* Continue program giving it specified signal. */
1146 signal_command (const char *signum_exp
, int from_tty
)
1148 enum gdb_signal oursig
;
1151 dont_repeat (); /* Too dangerous. */
1153 ensure_not_tfind_mode ();
1154 ensure_valid_thread ();
1155 ensure_not_running ();
1157 /* Find out whether we must run in the background. */
1158 gdb::unique_xmalloc_ptr
<char> stripped
1159 = strip_bg_char (signum_exp
, &async_exec
);
1160 signum_exp
= stripped
.get ();
1162 prepare_execution_command (current_inferior ()->top_target (), async_exec
);
1165 error_no_arg (_("signal number"));
1167 /* It would be even slicker to make signal names be valid expressions,
1168 (the type could be "enum $signal" or some such), then the user could
1169 assign them to convenience variables. */
1170 oursig
= gdb_signal_from_name (signum_exp
);
1172 if (oursig
== GDB_SIGNAL_UNKNOWN
)
1174 /* No, try numeric. */
1175 int num
= parse_and_eval_long (signum_exp
);
1178 oursig
= GDB_SIGNAL_0
;
1180 oursig
= gdb_signal_from_command (num
);
1183 /* Look for threads other than the current that this command ends up
1184 resuming too (due to schedlock off), and warn if they'll get a
1185 signal delivered. "signal 0" is used to suppress a previous
1186 signal, but if the current thread is no longer the one that got
1187 the signal, then the user is potentially suppressing the signal
1188 of the wrong thread. */
1191 int must_confirm
= 0;
1193 /* This indicates what will be resumed. Either a single thread,
1194 a whole process, or all threads of all processes. */
1195 ptid_t resume_ptid
= user_visible_resume_ptid (0);
1196 process_stratum_target
*resume_target
1197 = user_visible_resume_target (resume_ptid
);
1199 thread_info
*current
= inferior_thread ();
1201 for (thread_info
*tp
: all_non_exited_threads (resume_target
, resume_ptid
))
1206 if (tp
->suspend
.stop_signal
!= GDB_SIGNAL_0
1207 && signal_pass_state (tp
->suspend
.stop_signal
))
1210 printf_unfiltered (_("Note:\n"));
1211 printf_unfiltered (_(" Thread %s previously stopped with signal %s, %s.\n"),
1212 print_thread_id (tp
),
1213 gdb_signal_to_name (tp
->suspend
.stop_signal
),
1214 gdb_signal_to_string (tp
->suspend
.stop_signal
));
1220 && !query (_("Continuing thread %s (the current thread) with specified signal will\n"
1221 "still deliver the signals noted above to their respective threads.\n"
1222 "Continue anyway? "),
1223 print_thread_id (inferior_thread ())))
1224 error (_("Not confirmed."));
1229 if (oursig
== GDB_SIGNAL_0
)
1230 printf_filtered (_("Continuing with no signal.\n"));
1232 printf_filtered (_("Continuing with signal %s.\n"),
1233 gdb_signal_to_name (oursig
));
1236 clear_proceed_status (0);
1237 proceed ((CORE_ADDR
) -1, oursig
);
1240 /* Queue a signal to be delivered to the current thread. */
1243 queue_signal_command (const char *signum_exp
, int from_tty
)
1245 enum gdb_signal oursig
;
1246 struct thread_info
*tp
;
1249 ensure_not_tfind_mode ();
1250 ensure_valid_thread ();
1251 ensure_not_running ();
1253 if (signum_exp
== NULL
)
1254 error_no_arg (_("signal number"));
1256 /* It would be even slicker to make signal names be valid expressions,
1257 (the type could be "enum $signal" or some such), then the user could
1258 assign them to convenience variables. */
1259 oursig
= gdb_signal_from_name (signum_exp
);
1261 if (oursig
== GDB_SIGNAL_UNKNOWN
)
1263 /* No, try numeric. */
1264 int num
= parse_and_eval_long (signum_exp
);
1267 oursig
= GDB_SIGNAL_0
;
1269 oursig
= gdb_signal_from_command (num
);
1272 if (oursig
!= GDB_SIGNAL_0
1273 && !signal_pass_state (oursig
))
1274 error (_("Signal handling set to not pass this signal to the program."));
1276 tp
= inferior_thread ();
1277 tp
->suspend
.stop_signal
= oursig
;
1280 /* Data for the FSM that manages the until (with no argument)
1283 struct until_next_fsm
: public thread_fsm
1285 /* The thread that as current when the command was executed. */
1288 until_next_fsm (struct interp
*cmd_interp
, int thread
)
1289 : thread_fsm (cmd_interp
),
1294 bool should_stop (struct thread_info
*thread
) override
;
1295 void clean_up (struct thread_info
*thread
) override
;
1296 enum async_reply_reason
do_async_reply_reason () override
;
1299 /* Implementation of the 'should_stop' FSM method for the until (with
1303 until_next_fsm::should_stop (struct thread_info
*tp
)
1305 if (tp
->control
.stop_step
)
1311 /* Implementation of the 'clean_up' FSM method for the until (with no
1315 until_next_fsm::clean_up (struct thread_info
*thread
)
1317 delete_longjmp_breakpoint (thread
->global_num
);
1320 /* Implementation of the 'async_reply_reason' FSM method for the until
1321 (with no arg) command. */
1323 enum async_reply_reason
1324 until_next_fsm::do_async_reply_reason ()
1326 return EXEC_ASYNC_END_STEPPING_RANGE
;
1329 /* Proceed until we reach a different source line with pc greater than
1330 our current one or exit the function. We skip calls in both cases.
1332 Note that eventually this command should probably be changed so
1333 that only source lines are printed out when we hit the breakpoint
1334 we set. This may involve changes to wait_for_inferior and the
1335 proceed status code. */
1338 until_next_command (int from_tty
)
1340 struct frame_info
*frame
;
1342 struct symbol
*func
;
1343 struct symtab_and_line sal
;
1344 struct thread_info
*tp
= inferior_thread ();
1345 int thread
= tp
->global_num
;
1346 struct until_next_fsm
*sm
;
1348 clear_proceed_status (0);
1349 set_step_frame (tp
);
1351 frame
= get_current_frame ();
1353 /* Step until either exited from this function or greater
1354 than the current line (if in symbolic section) or pc (if
1357 pc
= get_frame_pc (frame
);
1358 func
= find_pc_function (pc
);
1362 struct bound_minimal_symbol msymbol
= lookup_minimal_symbol_by_pc (pc
);
1364 if (msymbol
.minsym
== NULL
)
1365 error (_("Execution is not within a known function."));
1367 tp
->control
.step_range_start
= BMSYMBOL_VALUE_ADDRESS (msymbol
);
1368 /* The upper-bound of step_range is exclusive. In order to make PC
1369 within the range, set the step_range_end with PC + 1. */
1370 tp
->control
.step_range_end
= pc
+ 1;
1374 sal
= find_pc_line (pc
, 0);
1376 tp
->control
.step_range_start
= BLOCK_ENTRY_PC (SYMBOL_BLOCK_VALUE (func
));
1377 tp
->control
.step_range_end
= sal
.end
;
1379 tp
->control
.may_range_step
= 1;
1381 tp
->control
.step_over_calls
= STEP_OVER_ALL
;
1383 set_longjmp_breakpoint (tp
, get_frame_id (frame
));
1384 delete_longjmp_breakpoint_cleanup
lj_deleter (thread
);
1386 sm
= new until_next_fsm (command_interp (), tp
->global_num
);
1387 tp
->thread_fsm
= sm
;
1388 lj_deleter
.release ();
1390 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
1394 until_command (const char *arg
, int from_tty
)
1399 ensure_not_tfind_mode ();
1400 ensure_valid_thread ();
1401 ensure_not_running ();
1403 /* Find out whether we must run in the background. */
1404 gdb::unique_xmalloc_ptr
<char> stripped
= strip_bg_char (arg
, &async_exec
);
1405 arg
= stripped
.get ();
1407 prepare_execution_command (current_inferior ()->top_target (), async_exec
);
1410 until_break_command (arg
, from_tty
, 0);
1412 until_next_command (from_tty
);
1416 advance_command (const char *arg
, int from_tty
)
1421 ensure_not_tfind_mode ();
1422 ensure_valid_thread ();
1423 ensure_not_running ();
1426 error_no_arg (_("a location"));
1428 /* Find out whether we must run in the background. */
1429 gdb::unique_xmalloc_ptr
<char> stripped
= strip_bg_char (arg
, &async_exec
);
1430 arg
= stripped
.get ();
1432 prepare_execution_command (current_inferior ()->top_target (), async_exec
);
1434 until_break_command (arg
, from_tty
, 1);
1437 /* Return the value of the result of a function at the end of a 'finish'
1438 command/BP. DTOR_DATA (if not NULL) can represent inferior registers
1439 right after an inferior call has finished. */
1442 get_return_value (struct value
*function
, struct type
*value_type
)
1444 regcache
*stop_regs
= get_current_regcache ();
1445 struct gdbarch
*gdbarch
= stop_regs
->arch ();
1446 struct value
*value
;
1448 value_type
= check_typedef (value_type
);
1449 gdb_assert (value_type
->code () != TYPE_CODE_VOID
);
1451 /* FIXME: 2003-09-27: When returning from a nested inferior function
1452 call, it's possible (with no help from the architecture vector)
1453 to locate and return/print a "struct return" value. This is just
1454 a more complicated case of what is already being done in the
1455 inferior function call code. In fact, when inferior function
1456 calls are made async, this will likely be made the norm. */
1458 switch (gdbarch_return_value (gdbarch
, function
, value_type
,
1461 case RETURN_VALUE_REGISTER_CONVENTION
:
1462 case RETURN_VALUE_ABI_RETURNS_ADDRESS
:
1463 case RETURN_VALUE_ABI_PRESERVES_ADDRESS
:
1464 value
= allocate_value (value_type
);
1465 gdbarch_return_value (gdbarch
, function
, value_type
, stop_regs
,
1466 value_contents_raw (value
), NULL
);
1468 case RETURN_VALUE_STRUCT_CONVENTION
:
1472 internal_error (__FILE__
, __LINE__
, _("bad switch"));
1478 /* The captured function return value/type and its position in the
1481 struct return_value_info
1483 /* The captured return value. May be NULL if we weren't able to
1484 retrieve it. See get_return_value. */
1485 struct value
*value
;
1487 /* The return type. In some cases, we'll not be able extract the
1488 return value, but we always know the type. */
1491 /* If we captured a value, this is the value history index. */
1492 int value_history_index
;
1495 /* Helper for print_return_value. */
1498 print_return_value_1 (struct ui_out
*uiout
, struct return_value_info
*rv
)
1500 if (rv
->value
!= NULL
)
1502 struct value_print_options opts
;
1505 uiout
->text ("Value returned is ");
1506 uiout
->field_fmt ("gdb-result-var", "$%d",
1507 rv
->value_history_index
);
1508 uiout
->text (" = ");
1509 get_user_print_options (&opts
);
1511 if (opts
.finish_print
)
1514 value_print (rv
->value
, &stb
, &opts
);
1515 uiout
->field_stream ("return-value", stb
);
1518 uiout
->field_string ("return-value", _("<not displayed>"),
1519 metadata_style
.style ());
1524 std::string type_name
= type_to_string (rv
->type
);
1525 uiout
->text ("Value returned has type: ");
1526 uiout
->field_string ("return-type", type_name
.c_str ());
1528 uiout
->text (" Cannot determine contents\n");
1532 /* Print the result of a function at the end of a 'finish' command.
1533 RV points at an object representing the captured return value/type
1534 and its position in the value history. */
1537 print_return_value (struct ui_out
*uiout
, struct return_value_info
*rv
)
1539 if (rv
->type
== NULL
1540 || check_typedef (rv
->type
)->code () == TYPE_CODE_VOID
)
1545 /* print_return_value_1 can throw an exception in some
1546 circumstances. We need to catch this so that we still
1547 delete the breakpoint. */
1548 print_return_value_1 (uiout
, rv
);
1550 catch (const gdb_exception
&ex
)
1552 exception_print (gdb_stdout
, ex
);
1556 /* Data for the FSM that manages the finish command. */
1558 struct finish_command_fsm
: public thread_fsm
1560 /* The momentary breakpoint set at the function's return address in
1562 breakpoint_up breakpoint
;
1564 /* The function that we're stepping out of. */
1565 struct symbol
*function
= nullptr;
1567 /* If the FSM finishes successfully, this stores the function's
1569 struct return_value_info return_value_info
{};
1571 explicit finish_command_fsm (struct interp
*cmd_interp
)
1572 : thread_fsm (cmd_interp
)
1576 bool should_stop (struct thread_info
*thread
) override
;
1577 void clean_up (struct thread_info
*thread
) override
;
1578 struct return_value_info
*return_value () override
;
1579 enum async_reply_reason
do_async_reply_reason () override
;
1582 /* Implementation of the 'should_stop' FSM method for the finish
1583 commands. Detects whether the thread stepped out of the function
1584 successfully, and if so, captures the function's return value and
1585 marks the FSM finished. */
1588 finish_command_fsm::should_stop (struct thread_info
*tp
)
1590 struct return_value_info
*rv
= &return_value_info
;
1592 if (function
!= NULL
1593 && bpstat_find_breakpoint (tp
->control
.stop_bpstat
,
1594 breakpoint
.get ()) != NULL
)
1599 rv
->type
= TYPE_TARGET_TYPE (SYMBOL_TYPE (function
));
1600 if (rv
->type
== NULL
)
1601 internal_error (__FILE__
, __LINE__
,
1602 _("finish_command: function has no target type"));
1604 if (check_typedef (rv
->type
)->code () != TYPE_CODE_VOID
)
1608 func
= read_var_value (function
, NULL
, get_current_frame ());
1609 rv
->value
= get_return_value (func
, rv
->type
);
1610 if (rv
->value
!= NULL
)
1611 rv
->value_history_index
= record_latest_value (rv
->value
);
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
;
1665 pc
= get_frame_pc (get_current_frame ());
1667 if (find_pc_partial_function (pc
, NULL
, &func_addr
, NULL
) == 0)
1668 error (_("Cannot find bounds of current function"));
1670 sal
= find_pc_line (func_addr
, 0);
1672 tp
->control
.proceed_to_finish
= 1;
1673 /* Special case: if we're sitting at the function entry point,
1674 then all we need to do is take a reverse singlestep. We
1675 don't need to set a breakpoint, and indeed it would do us
1678 Note that this can only happen at frame #0, since there's
1679 no way that a function up the stack can have a return address
1680 that's equal to its entry point. */
1684 struct frame_info
*frame
= get_selected_frame (NULL
);
1685 struct gdbarch
*gdbarch
= get_frame_arch (frame
);
1687 /* Set a step-resume at the function's entry point. Once that's
1688 hit, we'll do one more step backwards. */
1689 symtab_and_line sr_sal
;
1691 sr_sal
.pspace
= get_frame_program_space (frame
);
1692 insert_step_resume_breakpoint_at_sal (gdbarch
,
1693 sr_sal
, null_frame_id
);
1695 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
1699 /* We're almost there -- we just need to back up by one more
1701 tp
->control
.step_range_start
= tp
->control
.step_range_end
= 1;
1702 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
1706 /* finish_forward -- helper function for finish_command. FRAME is the
1707 frame that called the function we're about to step out of. */
1710 finish_forward (struct finish_command_fsm
*sm
, struct frame_info
*frame
)
1712 struct frame_id frame_id
= get_frame_id (frame
);
1713 struct gdbarch
*gdbarch
= get_frame_arch (frame
);
1714 struct symtab_and_line sal
;
1715 struct thread_info
*tp
= inferior_thread ();
1717 sal
= find_pc_line (get_frame_pc (frame
), 0);
1718 sal
.pc
= get_frame_pc (frame
);
1720 sm
->breakpoint
= set_momentary_breakpoint (gdbarch
, sal
,
1721 get_stack_frame_id (frame
),
1724 /* set_momentary_breakpoint invalidates FRAME. */
1727 set_longjmp_breakpoint (tp
, frame_id
);
1729 /* We want to print return value, please... */
1730 tp
->control
.proceed_to_finish
= 1;
1732 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
1735 /* Skip frames for "finish". */
1737 static struct frame_info
*
1738 skip_finish_frames (struct frame_info
*frame
)
1740 struct frame_info
*start
;
1746 frame
= skip_tailcall_frames (frame
);
1750 frame
= skip_unwritable_frames (frame
);
1754 while (start
!= frame
);
1759 /* "finish": Set a temporary breakpoint at the place the selected
1760 frame will return to, then continue. */
1763 finish_command (const char *arg
, int from_tty
)
1765 struct frame_info
*frame
;
1767 struct finish_command_fsm
*sm
;
1768 struct thread_info
*tp
;
1771 ensure_not_tfind_mode ();
1772 ensure_valid_thread ();
1773 ensure_not_running ();
1775 /* Find out whether we must run in the background. */
1776 gdb::unique_xmalloc_ptr
<char> stripped
= strip_bg_char (arg
, &async_exec
);
1777 arg
= stripped
.get ();
1779 prepare_execution_command (current_inferior ()->top_target (), async_exec
);
1782 error (_("The \"finish\" command does not take any arguments."));
1784 frame
= get_prev_frame (get_selected_frame (_("No selected frame.")));
1786 error (_("\"finish\" not meaningful in the outermost frame."));
1788 clear_proceed_status (0);
1790 tp
= inferior_thread ();
1792 sm
= new finish_command_fsm (command_interp ());
1794 tp
->thread_fsm
= sm
;
1796 /* Finishing from an inline frame is completely different. We don't
1797 try to show the "return value" - no way to locate it. */
1798 if (get_frame_type (get_selected_frame (_("No selected frame.")))
1801 /* Claim we are stepping in the calling frame. An empty step
1802 range means that we will stop once we aren't in a function
1803 called by that frame. We don't use the magic "1" value for
1804 step_range_end, because then infrun will think this is nexti,
1805 and not step over the rest of this inlined function call. */
1806 set_step_info (tp
, frame
, {});
1807 tp
->control
.step_range_start
= get_frame_pc (frame
);
1808 tp
->control
.step_range_end
= tp
->control
.step_range_start
;
1809 tp
->control
.step_over_calls
= STEP_OVER_ALL
;
1811 /* Print info on the selected frame, including level number but not
1815 printf_filtered (_("Run till exit from "));
1816 print_stack_frame (get_selected_frame (NULL
), 1, LOCATION
, 0);
1819 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
1823 /* Find the function we will return from. */
1825 sm
->function
= find_pc_function (get_frame_pc (get_selected_frame (NULL
)));
1827 /* Print info on the selected frame, including level number but not
1831 if (execution_direction
== EXEC_REVERSE
)
1832 printf_filtered (_("Run back to call of "));
1835 if (sm
->function
!= NULL
&& TYPE_NO_RETURN (sm
->function
->type
)
1836 && !query (_("warning: Function %s does not return normally.\n"
1837 "Try to finish anyway? "),
1838 sm
->function
->print_name ()))
1839 error (_("Not confirmed."));
1840 printf_filtered (_("Run till exit from "));
1843 print_stack_frame (get_selected_frame (NULL
), 1, LOCATION
, 0);
1846 if (execution_direction
== EXEC_REVERSE
)
1847 finish_backward (sm
);
1850 frame
= skip_finish_frames (frame
);
1853 error (_("Cannot find the caller frame."));
1855 finish_forward (sm
, frame
);
1861 info_program_command (const char *args
, int from_tty
)
1866 process_stratum_target
*proc_target
;
1868 if (!target_has_execution ())
1870 printf_filtered (_("The program being debugged is not being run.\n"));
1876 ptid
= inferior_ptid
;
1877 proc_target
= current_inferior ()->process_target ();
1880 get_last_target_status (&proc_target
, &ptid
, nullptr);
1882 if (ptid
== null_ptid
|| ptid
== minus_one_ptid
)
1883 error (_("No selected thread."));
1885 thread_info
*tp
= find_thread_ptid (proc_target
, ptid
);
1887 if (tp
->state
== THREAD_EXITED
)
1888 error (_("Invalid selected thread."));
1889 else if (tp
->state
== THREAD_RUNNING
)
1890 error (_("Selected thread is running."));
1892 bs
= tp
->control
.stop_bpstat
;
1893 stat
= bpstat_num (&bs
, &num
);
1895 target_files_info ();
1896 printf_filtered (_("Program stopped at %s.\n"),
1897 paddress (target_gdbarch (), tp
->suspend
.stop_pc
));
1898 if (tp
->control
.stop_step
)
1899 printf_filtered (_("It stopped after being stepped.\n"));
1902 /* There may be several breakpoints in the same place, so this
1903 isn't as strange as it seems. */
1908 printf_filtered (_("It stopped at a breakpoint "
1909 "that has since been deleted.\n"));
1912 printf_filtered (_("It stopped at breakpoint %d.\n"), num
);
1913 stat
= bpstat_num (&bs
, &num
);
1916 else if (tp
->suspend
.stop_signal
!= GDB_SIGNAL_0
)
1918 printf_filtered (_("It stopped with signal %s, %s.\n"),
1919 gdb_signal_to_name (tp
->suspend
.stop_signal
),
1920 gdb_signal_to_string (tp
->suspend
.stop_signal
));
1925 printf_filtered (_("Type \"info stack\" or \"info "
1926 "registers\" for more information.\n"));
1931 environment_info (const char *var
, int from_tty
)
1935 const char *val
= current_inferior ()->environment
.get (var
);
1939 puts_filtered (var
);
1940 puts_filtered (" = ");
1941 puts_filtered (val
);
1942 puts_filtered ("\n");
1946 puts_filtered ("Environment variable \"");
1947 puts_filtered (var
);
1948 puts_filtered ("\" not defined.\n");
1953 char **envp
= current_inferior ()->environment
.envp ();
1955 for (int idx
= 0; envp
[idx
] != NULL
; ++idx
)
1957 puts_filtered (envp
[idx
]);
1958 puts_filtered ("\n");
1964 set_environment_command (const char *arg
, int from_tty
)
1966 const char *p
, *val
;
1970 error_no_arg (_("environment variable and value"));
1972 /* Find separation between variable name and value. */
1973 p
= (char *) strchr (arg
, '=');
1974 val
= (char *) strchr (arg
, ' ');
1976 if (p
!= 0 && val
!= 0)
1978 /* We have both a space and an equals. If the space is before the
1979 equals, walk forward over the spaces til we see a nonspace
1980 (possibly the equals). */
1985 /* Now if the = is after the char following the spaces,
1986 take the char following the spaces. */
1990 else if (val
!= 0 && p
== 0)
1994 error_no_arg (_("environment variable to set"));
1996 if (p
== 0 || p
[1] == 0)
2000 p
= arg
+ strlen (arg
); /* So that savestring below will work. */
2004 /* Not setting variable value to null. */
2006 while (*val
== ' ' || *val
== '\t')
2010 while (p
!= arg
&& (p
[-1] == ' ' || p
[-1] == '\t'))
2013 std::string
var (arg
, p
- arg
);
2016 printf_filtered (_("Setting environment variable "
2017 "\"%s\" to null value.\n"),
2019 current_inferior ()->environment
.set (var
.c_str (), "");
2022 current_inferior ()->environment
.set (var
.c_str (), val
);
2026 unset_environment_command (const char *var
, int from_tty
)
2030 /* If there is no argument, delete all environment variables.
2031 Ask for confirmation if reading from the terminal. */
2032 if (!from_tty
|| query (_("Delete all environment variables? ")))
2033 current_inferior ()->environment
.clear ();
2036 current_inferior ()->environment
.unset (var
);
2039 /* Handle the execution path (PATH variable). */
2041 static const char path_var_name
[] = "PATH";
2044 path_info (const char *args
, int from_tty
)
2046 puts_filtered ("Executable and object file path: ");
2047 puts_filtered (current_inferior ()->environment
.get (path_var_name
));
2048 puts_filtered ("\n");
2051 /* Add zero or more directories to the front of the execution path. */
2054 path_command (const char *dirname
, int from_tty
)
2060 env
= current_inferior ()->environment
.get (path_var_name
);
2061 /* Can be null if path is not set. */
2064 exec_path
= xstrdup (env
);
2065 mod_path (dirname
, &exec_path
);
2066 current_inferior ()->environment
.set (path_var_name
, exec_path
);
2069 path_info (NULL
, from_tty
);
2074 pad_to_column (string_file
&stream
, int col
)
2076 /* At least one space must be printed to separate columns. */
2078 const int size
= stream
.size ();
2080 stream
.puts (n_spaces (col
- size
));
2083 /* Print out the register NAME with value VAL, to FILE, in the default
2087 default_print_one_register_info (struct ui_file
*file
,
2091 struct type
*regtype
= value_type (val
);
2092 int print_raw_format
;
2093 string_file format_stream
;
2096 value_column_1
= 15,
2097 /* Give enough room for "0x", 16 hex digits and two spaces in
2098 preceding column. */
2099 value_column_2
= value_column_1
+ 2 + 16 + 2,
2102 format_stream
.puts (name
);
2103 pad_to_column (format_stream
, value_column_1
);
2105 print_raw_format
= (value_entirely_available (val
)
2106 && !value_optimized_out (val
));
2108 /* If virtual format is floating, print it that way, and in raw
2110 if (regtype
->code () == TYPE_CODE_FLT
2111 || regtype
->code () == TYPE_CODE_DECFLOAT
)
2113 struct value_print_options opts
;
2114 const gdb_byte
*valaddr
= value_contents_for_printing (val
);
2115 enum bfd_endian byte_order
= type_byte_order (regtype
);
2117 get_user_print_options (&opts
);
2120 common_val_print (val
, &format_stream
, 0, &opts
, current_language
);
2122 if (print_raw_format
)
2124 pad_to_column (format_stream
, value_column_2
);
2125 format_stream
.puts ("(raw ");
2126 print_hex_chars (&format_stream
, valaddr
, TYPE_LENGTH (regtype
),
2128 format_stream
.putc (')');
2133 struct value_print_options opts
;
2135 /* Print the register in hex. */
2136 get_formatted_print_options (&opts
, 'x');
2138 common_val_print (val
, &format_stream
, 0, &opts
, current_language
);
2139 /* If not a vector register, print it also according to its
2141 if (print_raw_format
&& regtype
->is_vector () == 0)
2143 pad_to_column (format_stream
, value_column_2
);
2144 get_user_print_options (&opts
);
2146 common_val_print (val
, &format_stream
, 0, &opts
, current_language
);
2150 fputs_filtered (format_stream
.c_str (), file
);
2151 fprintf_filtered (file
, "\n");
2154 /* Print out the machine register regnum. If regnum is -1, print all
2155 registers (print_all == 1) or all non-float and non-vector
2156 registers (print_all == 0).
2158 For most machines, having all_registers_info() print the
2159 register(s) one per line is good enough. If a different format is
2160 required, (eg, for MIPS or Pyramid 90x, which both have lots of
2161 regs), or there is an existing convention for showing all the
2162 registers, define the architecture method PRINT_REGISTERS_INFO to
2163 provide that format. */
2166 default_print_registers_info (struct gdbarch
*gdbarch
,
2167 struct ui_file
*file
,
2168 struct frame_info
*frame
,
2169 int regnum
, int print_all
)
2172 const int numregs
= gdbarch_num_cooked_regs (gdbarch
);
2174 for (i
= 0; i
< numregs
; i
++)
2176 /* Decide between printing all regs, non-float / vector regs, or
2182 if (!gdbarch_register_reggroup_p (gdbarch
, i
, all_reggroup
))
2187 if (!gdbarch_register_reggroup_p (gdbarch
, i
, general_reggroup
))
2197 /* If the register name is empty, it is undefined for this
2198 processor, so don't display anything. */
2199 if (gdbarch_register_name (gdbarch
, i
) == NULL
2200 || *(gdbarch_register_name (gdbarch
, i
)) == '\0')
2203 default_print_one_register_info (file
,
2204 gdbarch_register_name (gdbarch
, i
),
2205 value_of_register (i
, frame
));
2210 registers_info (const char *addr_exp
, int fpregs
)
2212 struct frame_info
*frame
;
2213 struct gdbarch
*gdbarch
;
2215 if (!target_has_registers ())
2216 error (_("The program has no registers now."));
2217 frame
= get_selected_frame (NULL
);
2218 gdbarch
= get_frame_arch (frame
);
2222 gdbarch_print_registers_info (gdbarch
, gdb_stdout
,
2227 while (*addr_exp
!= '\0')
2232 /* Skip leading white space. */
2233 addr_exp
= skip_spaces (addr_exp
);
2235 /* Discard any leading ``$''. Check that there is something
2236 resembling a register following it. */
2237 if (addr_exp
[0] == '$')
2239 if (isspace ((*addr_exp
)) || (*addr_exp
) == '\0')
2240 error (_("Missing register name"));
2242 /* Find the start/end of this register name/num/group. */
2244 while ((*addr_exp
) != '\0' && !isspace ((*addr_exp
)))
2248 /* Figure out what we've found and display it. */
2250 /* A register name? */
2252 int regnum
= user_reg_map_name_to_regnum (gdbarch
, start
, end
- start
);
2256 /* User registers lie completely outside of the range of
2257 normal registers. Catch them early so that the target
2259 if (regnum
>= gdbarch_num_cooked_regs (gdbarch
))
2261 struct value
*regval
= value_of_user_reg (regnum
, frame
);
2262 const char *regname
= user_reg_map_regnum_to_name (gdbarch
,
2265 /* Print in the same fashion
2266 gdbarch_print_registers_info's default
2267 implementation prints. */
2268 default_print_one_register_info (gdb_stdout
,
2273 gdbarch_print_registers_info (gdbarch
, gdb_stdout
,
2274 frame
, regnum
, fpregs
);
2279 /* A register group? */
2281 struct reggroup
*group
;
2283 for (group
= reggroup_next (gdbarch
, NULL
);
2285 group
= reggroup_next (gdbarch
, group
))
2287 /* Don't bother with a length check. Should the user
2288 enter a short register group name, go with the first
2289 group that matches. */
2290 if (strncmp (start
, reggroup_name (group
), end
- start
) == 0)
2298 regnum
< gdbarch_num_cooked_regs (gdbarch
);
2301 if (gdbarch_register_reggroup_p (gdbarch
, regnum
, group
))
2302 gdbarch_print_registers_info (gdbarch
,
2310 /* Nothing matched. */
2311 error (_("Invalid register `%.*s'"), (int) (end
- start
), start
);
2316 info_all_registers_command (const char *addr_exp
, int from_tty
)
2318 registers_info (addr_exp
, 1);
2322 info_registers_command (const char *addr_exp
, int from_tty
)
2324 registers_info (addr_exp
, 0);
2328 print_vector_info (struct ui_file
*file
,
2329 struct frame_info
*frame
, const char *args
)
2331 struct gdbarch
*gdbarch
= get_frame_arch (frame
);
2333 if (gdbarch_print_vector_info_p (gdbarch
))
2334 gdbarch_print_vector_info (gdbarch
, file
, frame
, args
);
2338 int printed_something
= 0;
2340 for (regnum
= 0; regnum
< gdbarch_num_cooked_regs (gdbarch
); regnum
++)
2342 if (gdbarch_register_reggroup_p (gdbarch
, regnum
, vector_reggroup
))
2344 printed_something
= 1;
2345 gdbarch_print_registers_info (gdbarch
, file
, frame
, regnum
, 1);
2348 if (!printed_something
)
2349 fprintf_filtered (file
, "No vector information\n");
2354 info_vector_command (const char *args
, int from_tty
)
2356 if (!target_has_registers ())
2357 error (_("The program has no registers now."));
2359 print_vector_info (gdb_stdout
, get_selected_frame (NULL
), args
);
2362 /* Kill the inferior process. Make us have no inferior. */
2365 kill_command (const char *arg
, int from_tty
)
2367 /* FIXME: This should not really be inferior_ptid (or target_has_execution).
2368 It should be a distinct flag that indicates that a target is active, cuz
2369 some targets don't have processes! */
2371 if (inferior_ptid
== null_ptid
)
2372 error (_("The program is not being run."));
2373 if (!query (_("Kill the program being debugged? ")))
2374 error (_("Not confirmed."));
2376 int pid
= current_inferior ()->pid
;
2377 /* Save the pid as a string before killing the inferior, since that
2378 may unpush the current target, and we need the string after. */
2379 std::string pid_str
= target_pid_to_str (ptid_t (pid
));
2380 int infnum
= current_inferior ()->num
;
2384 if (print_inferior_events
)
2385 printf_unfiltered (_("[Inferior %d (%s) killed]\n"),
2386 infnum
, pid_str
.c_str ());
2388 bfd_cache_close_all ();
2391 /* Used in `attach&' command. Proceed threads of inferior INF iff
2392 they stopped due to debugger request, and when they did, they
2393 reported a clean stop (GDB_SIGNAL_0). Do not proceed threads that
2394 have been explicitly been told to stop. */
2397 proceed_after_attach (inferior
*inf
)
2399 /* Don't error out if the current thread is running, because
2400 there may be other stopped threads. */
2402 /* Backup current thread and selected frame. */
2403 scoped_restore_current_thread restore_thread
;
2405 for (thread_info
*thread
: inf
->non_exited_threads ())
2406 if (!thread
->executing
2407 && !thread
->stop_requested
2408 && thread
->suspend
.stop_signal
== GDB_SIGNAL_0
)
2410 switch_to_thread (thread
);
2411 clear_proceed_status (0);
2412 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
2416 /* See inferior.h. */
2419 setup_inferior (int from_tty
)
2421 struct inferior
*inferior
;
2423 inferior
= current_inferior ();
2424 inferior
->needs_setup
= 0;
2426 /* If no exec file is yet known, try to determine it from the
2428 if (get_exec_file (0) == NULL
)
2429 exec_file_locate_attach (inferior_ptid
.pid (), 1, from_tty
);
2432 reopen_exec_file ();
2436 /* Take any necessary post-attaching actions for this platform. */
2437 target_post_attach (inferior_ptid
.pid ());
2439 post_create_inferior (from_tty
);
2442 /* What to do after the first program stops after attaching. */
2443 enum attach_post_wait_mode
2445 /* Do nothing. Leaves threads as they are. */
2446 ATTACH_POST_WAIT_NOTHING
,
2448 /* Re-resume threads that are marked running. */
2449 ATTACH_POST_WAIT_RESUME
,
2451 /* Stop all threads. */
2452 ATTACH_POST_WAIT_STOP
,
2455 /* Called after we've attached to a process and we've seen it stop for
2456 the first time. If ASYNC_EXEC is true, re-resume threads that
2457 should be running. Else if ATTACH, */
2460 attach_post_wait (const char *args
, int from_tty
, enum attach_post_wait_mode mode
)
2462 struct inferior
*inferior
;
2464 inferior
= current_inferior ();
2465 inferior
->control
.stop_soon
= NO_STOP_QUIETLY
;
2467 if (inferior
->needs_setup
)
2468 setup_inferior (from_tty
);
2470 if (mode
== ATTACH_POST_WAIT_RESUME
)
2472 /* The user requested an `attach&', so be sure to leave threads
2473 that didn't get a signal running. */
2475 /* Immediatelly resume all suspended threads of this inferior,
2476 and this inferior only. This should have no effect on
2477 already running threads. If a thread has been stopped with a
2478 signal, leave it be. */
2480 proceed_after_attach (inferior
);
2483 if (inferior_thread ()->suspend
.stop_signal
== GDB_SIGNAL_0
)
2485 clear_proceed_status (0);
2486 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
2490 else if (mode
== ATTACH_POST_WAIT_STOP
)
2492 /* The user requested a plain `attach', so be sure to leave
2493 the inferior stopped. */
2495 /* At least the current thread is already stopped. */
2497 /* In all-stop, by definition, all threads have to be already
2498 stopped at this point. In non-stop, however, although the
2499 selected thread is stopped, others may still be executing.
2500 Be sure to explicitly stop all threads of the process. This
2501 should have no effect on already stopped threads. */
2503 target_stop (ptid_t (inferior
->pid
));
2504 else if (target_is_non_stop_p ())
2506 struct thread_info
*lowest
= inferior_thread ();
2508 stop_all_threads ();
2510 /* It's not defined which thread will report the attach
2511 stop. For consistency, always select the thread with
2512 lowest GDB number, which should be the main thread, if it
2514 for (thread_info
*thread
: current_inferior ()->non_exited_threads ())
2515 if (thread
->inf
->num
< lowest
->inf
->num
2516 || thread
->per_inf_num
< lowest
->per_inf_num
)
2519 switch_to_thread (lowest
);
2522 /* Tell the user/frontend where we're stopped. */
2524 if (deprecated_attach_hook
)
2525 deprecated_attach_hook ();
2529 struct attach_command_continuation_args
2533 enum attach_post_wait_mode mode
;
2537 attach_command_continuation (void *args
, int err
)
2539 struct attach_command_continuation_args
*a
2540 = (struct attach_command_continuation_args
*) args
;
2545 attach_post_wait (a
->args
, a
->from_tty
, a
->mode
);
2549 attach_command_continuation_free_args (void *args
)
2551 struct attach_command_continuation_args
*a
2552 = (struct attach_command_continuation_args
*) args
;
2558 /* "attach" command entry point. Takes a program started up outside
2559 of gdb and ``attaches'' to it. This stops it cold in its tracks
2560 and allows us to start debugging it. */
2563 attach_command (const char *args
, int from_tty
)
2566 struct target_ops
*attach_target
;
2567 struct inferior
*inferior
= current_inferior ();
2568 enum attach_post_wait_mode mode
;
2570 dont_repeat (); /* Not for the faint of heart */
2572 scoped_disable_commit_resumed
disable_commit_resumed ("attaching");
2574 if (gdbarch_has_global_solist (target_gdbarch ()))
2575 /* Don't complain if all processes share the same symbol
2578 else if (target_has_execution ())
2580 if (query (_("A program is being debugged already. Kill it? ")))
2583 error (_("Not killed."));
2586 /* Clean up any leftovers from other runs. Some other things from
2587 this function should probably be moved into target_pre_inferior. */
2588 target_pre_inferior (from_tty
);
2590 gdb::unique_xmalloc_ptr
<char> stripped
= strip_bg_char (args
, &async_exec
);
2591 args
= stripped
.get ();
2593 attach_target
= find_attach_target ();
2595 prepare_execution_command (attach_target
, async_exec
);
2597 if (non_stop
&& !attach_target
->supports_non_stop ())
2598 error (_("Cannot attach to this target in non-stop mode"));
2600 attach_target
->attach (args
, from_tty
);
2601 /* to_attach should push the target, so after this point we
2602 shouldn't refer to attach_target again. */
2603 attach_target
= NULL
;
2605 /* Set up the "saved terminal modes" of the inferior
2606 based on what modes we are starting it with. */
2607 target_terminal::init ();
2609 /* Install inferior's terminal modes. This may look like a no-op,
2610 as we've just saved them above, however, this does more than
2611 restore terminal settings:
2613 - installs a SIGINT handler that forwards SIGINT to the inferior.
2614 Otherwise a Ctrl-C pressed just while waiting for the initial
2615 stop would end up as a spurious Quit.
2617 - removes stdin from the event loop, which we need if attaching
2618 in the foreground, otherwise on targets that report an initial
2619 stop on attach (which are most) we'd process input/commands
2620 while we're in the event loop waiting for that stop. That is,
2621 before the attach continuation runs and the command is really
2623 target_terminal::inferior ();
2625 /* Set up execution context to know that we should return from
2626 wait_for_inferior as soon as the target reports a stop. */
2627 init_wait_for_inferior ();
2629 inferior
->needs_setup
= 1;
2631 if (target_is_non_stop_p ())
2633 /* If we find that the current thread isn't stopped, explicitly
2634 do so now, because we're going to install breakpoints and
2638 /* The user requested an `attach&'; stop just one thread. */
2639 target_stop (inferior_ptid
);
2641 /* The user requested an `attach', so stop all threads of this
2643 target_stop (ptid_t (inferior_ptid
.pid ()));
2646 /* Check for exec file mismatch, and let the user solve it. */
2647 validate_exec_file (from_tty
);
2649 mode
= async_exec
? ATTACH_POST_WAIT_RESUME
: ATTACH_POST_WAIT_STOP
;
2651 /* Some system don't generate traps when attaching to inferior.
2652 E.g. Mach 3 or GNU hurd. */
2653 if (!target_attach_no_wait ())
2655 struct attach_command_continuation_args
*a
;
2657 /* Careful here. See comments in inferior.h. Basically some
2658 OSes don't ignore SIGSTOPs on continue requests anymore. We
2659 need a way for handle_inferior_event to reset the stop_signal
2660 variable after an attach, and this is what
2661 STOP_QUIETLY_NO_SIGSTOP is for. */
2662 inferior
->control
.stop_soon
= STOP_QUIETLY_NO_SIGSTOP
;
2664 /* Wait for stop. */
2665 a
= XNEW (struct attach_command_continuation_args
);
2666 a
->args
= xstrdup (args
);
2667 a
->from_tty
= from_tty
;
2669 add_inferior_continuation (attach_command_continuation
, a
,
2670 attach_command_continuation_free_args
);
2672 /* Let infrun consider waiting for events out of this
2674 inferior
->process_target ()->threads_executing
= true;
2676 if (!target_is_async_p ())
2677 mark_infrun_async_event_handler ();
2681 attach_post_wait (args
, from_tty
, mode
);
2683 disable_commit_resumed
.reset_and_commit ();
2686 /* We had just found out that the target was already attached to an
2687 inferior. PTID points at a thread of this new inferior, that is
2688 the most likely to be stopped right now, but not necessarily so.
2689 The new inferior is assumed to be already added to the inferior
2690 list at this point. If LEAVE_RUNNING, then leave the threads of
2691 this inferior running, except those we've explicitly seen reported
2695 notice_new_inferior (thread_info
*thr
, int leave_running
, int from_tty
)
2697 enum attach_post_wait_mode mode
2698 = leave_running
? ATTACH_POST_WAIT_RESUME
: ATTACH_POST_WAIT_NOTHING
;
2700 gdb::optional
<scoped_restore_current_thread
> restore_thread
;
2702 if (inferior_ptid
!= null_ptid
)
2703 restore_thread
.emplace ();
2705 /* Avoid reading registers -- we haven't fetched the target
2707 switch_to_thread_no_regs (thr
);
2709 /* When we "notice" a new inferior we need to do all the things we
2710 would normally do if we had just attached to it. */
2714 struct attach_command_continuation_args
*a
;
2715 struct inferior
*inferior
= current_inferior ();
2717 /* We're going to install breakpoints, and poke at memory,
2718 ensure that the inferior is stopped for a moment while we do
2720 target_stop (inferior_ptid
);
2722 inferior
->control
.stop_soon
= STOP_QUIETLY_REMOTE
;
2724 /* Wait for stop before proceeding. */
2725 a
= XNEW (struct attach_command_continuation_args
);
2726 a
->args
= xstrdup ("");
2727 a
->from_tty
= from_tty
;
2729 add_inferior_continuation (attach_command_continuation
, a
,
2730 attach_command_continuation_free_args
);
2735 attach_post_wait ("" /* args */, from_tty
, mode
);
2740 * takes a program previously attached to and detaches it.
2741 * The program resumes execution and will no longer stop
2742 * on signals, etc. We better not have left any breakpoints
2743 * in the program or it'll die when it hits one. For this
2744 * to work, it may be necessary for the process to have been
2745 * previously attached. It *might* work if the program was
2746 * started via the normal ptrace (PTRACE_TRACEME).
2750 detach_command (const char *args
, int from_tty
)
2752 dont_repeat (); /* Not for the faint of heart. */
2754 if (inferior_ptid
== null_ptid
)
2755 error (_("The program is not being run."));
2757 scoped_disable_commit_resumed
disable_commit_resumed ("detaching");
2759 query_if_trace_running (from_tty
);
2761 disconnect_tracing ();
2763 /* Hold a strong reference to the target while (maybe)
2764 detaching the parent. Otherwise detaching could close the
2767 = target_ops_ref::new_reference (current_inferior ()->process_target ());
2769 /* Save this before detaching, since detaching may unpush the
2770 process_stratum target. */
2771 bool was_non_stop_p
= target_is_non_stop_p ();
2773 target_detach (current_inferior (), from_tty
);
2775 /* The current inferior process was just detached successfully. Get
2776 rid of breakpoints that no longer make sense. Note we don't do
2777 this within target_detach because that is also used when
2778 following child forks, and in that case we will want to transfer
2779 breakpoints to the child, not delete them. */
2780 breakpoint_init_inferior (inf_exited
);
2782 /* If the solist is global across inferiors, don't clear it when we
2783 detach from a single inferior. */
2784 if (!gdbarch_has_global_solist (target_gdbarch ()))
2785 no_shared_libraries (NULL
, from_tty
);
2787 if (deprecated_detach_hook
)
2788 deprecated_detach_hook ();
2790 if (!was_non_stop_p
)
2791 restart_after_all_stop_detach (as_process_stratum_target (target_ref
.get ()));
2793 disable_commit_resumed
.reset_and_commit ();
2796 /* Disconnect from the current target without resuming it (leaving it
2797 waiting for a debugger).
2799 We'd better not have left any breakpoints in the program or the
2800 next debugger will get confused. Currently only supported for some
2801 remote targets, since the normal attach mechanisms don't work on
2802 stopped processes on some native platforms (e.g. GNU/Linux). */
2805 disconnect_command (const char *args
, int from_tty
)
2807 dont_repeat (); /* Not for the faint of heart. */
2808 query_if_trace_running (from_tty
);
2809 disconnect_tracing ();
2810 target_disconnect (args
, from_tty
);
2811 no_shared_libraries (NULL
, from_tty
);
2812 init_thread_list ();
2813 if (deprecated_detach_hook
)
2814 deprecated_detach_hook ();
2817 /* Stop PTID in the current target, and tag the PTID threads as having
2818 been explicitly requested to stop. PTID can be a thread, a
2819 process, or minus_one_ptid, meaning all threads of all inferiors of
2820 the current target. */
2823 stop_current_target_threads_ns (ptid_t ptid
)
2827 /* Tag the thread as having been explicitly requested to stop, so
2828 other parts of gdb know not to resume this thread automatically,
2829 if it was stopped due to an internal event. Limit this to
2830 non-stop mode, as when debugging a multi-threaded application in
2831 all-stop mode, we will only get one stop event --- it's undefined
2832 which thread will report the event. */
2833 set_stop_requested (current_inferior ()->process_target (),
2837 /* See inferior.h. */
2840 interrupt_target_1 (bool all_threads
)
2842 scoped_disable_commit_resumed
disable_commit_resumed ("interrupting");
2848 scoped_restore_current_thread restore_thread
;
2850 for (inferior
*inf
: all_inferiors ())
2852 switch_to_inferior_no_thread (inf
);
2853 stop_current_target_threads_ns (minus_one_ptid
);
2857 stop_current_target_threads_ns (inferior_ptid
);
2860 target_interrupt ();
2862 disable_commit_resumed
.reset_and_commit ();
2866 Stop the execution of the target while running in async mode, in
2867 the background. In all-stop, stop the whole process. In non-stop
2868 mode, stop the current thread only by default, or stop all threads
2869 if the `-a' switch is used. */
2872 interrupt_command (const char *args
, int from_tty
)
2874 if (target_can_async_p ())
2876 int all_threads
= 0;
2878 dont_repeat (); /* Not for the faint of heart. */
2881 && startswith (args
, "-a"))
2884 if (!non_stop
&& all_threads
)
2885 error (_("-a is meaningless in all-stop mode."));
2887 interrupt_target_1 (all_threads
);
2891 /* See inferior.h. */
2894 default_print_float_info (struct gdbarch
*gdbarch
, struct ui_file
*file
,
2895 struct frame_info
*frame
, const char *args
)
2898 int printed_something
= 0;
2900 for (regnum
= 0; regnum
< gdbarch_num_cooked_regs (gdbarch
); regnum
++)
2902 if (gdbarch_register_reggroup_p (gdbarch
, regnum
, float_reggroup
))
2904 printed_something
= 1;
2905 gdbarch_print_registers_info (gdbarch
, file
, frame
, regnum
, 1);
2908 if (!printed_something
)
2909 fprintf_filtered (file
, "No floating-point info "
2910 "available for this processor.\n");
2914 info_float_command (const char *args
, int from_tty
)
2916 struct frame_info
*frame
;
2918 if (!target_has_registers ())
2919 error (_("The program has no registers now."));
2921 frame
= get_selected_frame (NULL
);
2922 gdbarch_print_float_info (get_frame_arch (frame
), gdb_stdout
, frame
, args
);
2925 /* Implement `info proc' family of commands. */
2928 info_proc_cmd_1 (const char *args
, enum info_proc_what what
, int from_tty
)
2930 struct gdbarch
*gdbarch
= get_current_arch ();
2932 if (!target_info_proc (args
, what
))
2934 if (gdbarch_info_proc_p (gdbarch
))
2935 gdbarch_info_proc (gdbarch
, args
, what
);
2937 error (_("Not supported on this target."));
2941 /* Implement `info proc' when given without any further parameters. */
2944 info_proc_cmd (const char *args
, int from_tty
)
2946 info_proc_cmd_1 (args
, IP_MINIMAL
, from_tty
);
2949 /* Implement `info proc mappings'. */
2952 info_proc_cmd_mappings (const char *args
, int from_tty
)
2954 info_proc_cmd_1 (args
, IP_MAPPINGS
, from_tty
);
2957 /* Implement `info proc stat'. */
2960 info_proc_cmd_stat (const char *args
, int from_tty
)
2962 info_proc_cmd_1 (args
, IP_STAT
, from_tty
);
2965 /* Implement `info proc status'. */
2968 info_proc_cmd_status (const char *args
, int from_tty
)
2970 info_proc_cmd_1 (args
, IP_STATUS
, from_tty
);
2973 /* Implement `info proc cwd'. */
2976 info_proc_cmd_cwd (const char *args
, int from_tty
)
2978 info_proc_cmd_1 (args
, IP_CWD
, from_tty
);
2981 /* Implement `info proc cmdline'. */
2984 info_proc_cmd_cmdline (const char *args
, int from_tty
)
2986 info_proc_cmd_1 (args
, IP_CMDLINE
, from_tty
);
2989 /* Implement `info proc exe'. */
2992 info_proc_cmd_exe (const char *args
, int from_tty
)
2994 info_proc_cmd_1 (args
, IP_EXE
, from_tty
);
2997 /* Implement `info proc files'. */
3000 info_proc_cmd_files (const char *args
, int from_tty
)
3002 info_proc_cmd_1 (args
, IP_FILES
, from_tty
);
3005 /* Implement `info proc all'. */
3008 info_proc_cmd_all (const char *args
, int from_tty
)
3010 info_proc_cmd_1 (args
, IP_ALL
, from_tty
);
3013 /* Implement `show print finish'. */
3016 show_print_finish (struct ui_file
*file
, int from_tty
,
3017 struct cmd_list_element
*c
,
3020 fprintf_filtered (file
, _("\
3021 Printing of return value after `finish' is %s.\n"),
3026 /* This help string is used for the run, start, and starti commands.
3027 It is defined as a macro to prevent duplication. */
3029 #define RUN_ARGS_HELP \
3030 "You may specify arguments to give it.\n\
3031 Args may include \"*\", or \"[...]\"; they are expanded using the\n\
3032 shell that will start the program (specified by the \"$SHELL\" environment\n\
3033 variable). Input and output redirection with \">\", \"<\", or \">>\"\n\
3034 are also allowed.\n\
3036 With no arguments, uses arguments last specified (with \"run\" or \n\
3037 \"set args\"). To cancel previous arguments and run with no arguments,\n\
3038 use \"set args\" without arguments.\n\
3040 To start the inferior without using a shell, use \"set startup-with-shell off\"."
3042 void _initialize_infcmd ();
3044 _initialize_infcmd ()
3046 static struct cmd_list_element
*info_proc_cmdlist
;
3047 struct cmd_list_element
*c
= NULL
;
3048 const char *cmd_name
;
3050 /* Add the filename of the terminal connected to inferior I/O. */
3051 add_setshow_optional_filename_cmd ("inferior-tty", class_run
,
3052 &inferior_io_terminal_scratch
, _("\
3053 Set terminal for future runs of program being debugged."), _("\
3054 Show terminal for future runs of program being debugged."), _("\
3055 Usage: set inferior-tty [TTY]\n\n\
3056 If TTY is omitted, the default behavior of using the same terminal as GDB\n\
3058 set_inferior_tty_command
,
3059 show_inferior_tty_command
,
3060 &setlist
, &showlist
);
3061 cmd_name
= "inferior-tty";
3062 c
= lookup_cmd (&cmd_name
, setlist
, "", NULL
, -1, 1);
3063 gdb_assert (c
!= NULL
);
3064 add_alias_cmd ("tty", c
, class_run
, 0, &cmdlist
);
3067 add_setshow_string_noescape_cmd (cmd_name
, class_run
,
3068 &inferior_args_scratch
, _("\
3069 Set argument list to give program being debugged when it is started."), _("\
3070 Show argument list to give program being debugged when it is started."), _("\
3071 Follow this command with any number of args, to be passed to the program."),
3074 &setlist
, &showlist
);
3075 c
= lookup_cmd (&cmd_name
, setlist
, "", NULL
, -1, 1);
3076 gdb_assert (c
!= NULL
);
3077 set_cmd_completer (c
, filename_completer
);
3080 add_setshow_string_noescape_cmd (cmd_name
, class_run
,
3081 &inferior_cwd_scratch
, _("\
3082 Set the current working directory to be used when the inferior is started.\n\
3083 Changing this setting does not have any effect on inferiors that are\n\
3086 Show the current working directory that is used when the inferior is started."),
3088 Use this command to change the current working directory that will be used\n\
3089 when the inferior is started. This setting does not affect GDB's current\n\
3090 working directory."),
3093 &setlist
, &showlist
);
3094 c
= lookup_cmd (&cmd_name
, setlist
, "", NULL
, -1, 1);
3095 gdb_assert (c
!= NULL
);
3096 set_cmd_completer (c
, filename_completer
);
3098 c
= add_cmd ("environment", no_class
, environment_info
, _("\
3099 The environment to give the program, or one variable's value.\n\
3100 With an argument VAR, prints the value of environment variable VAR to\n\
3101 give the program being debugged. With no arguments, prints the entire\n\
3102 environment to be given to the program."), &showlist
);
3103 set_cmd_completer (c
, noop_completer
);
3105 add_basic_prefix_cmd ("unset", no_class
,
3106 _("Complement to certain \"set\" commands."),
3107 &unsetlist
, "unset ", 0, &cmdlist
);
3109 c
= add_cmd ("environment", class_run
, unset_environment_command
, _("\
3110 Cancel environment variable VAR for the program.\n\
3111 This does not affect the program until the next \"run\" command."),
3113 set_cmd_completer (c
, noop_completer
);
3115 c
= add_cmd ("environment", class_run
, set_environment_command
, _("\
3116 Set environment variable value to give the program.\n\
3117 Arguments are VAR VALUE where VAR is variable name and VALUE is value.\n\
3118 VALUES of environment variables are uninterpreted strings.\n\
3119 This does not affect the program until the next \"run\" command."),
3121 set_cmd_completer (c
, noop_completer
);
3123 c
= add_com ("path", class_files
, path_command
, _("\
3124 Add directory DIR(s) to beginning of search path for object files.\n\
3125 $cwd in the path means the current working directory.\n\
3126 This path is equivalent to the $PATH shell variable. It is a list of\n\
3127 directories, separated by colons. These directories are searched to find\n\
3128 fully linked executable files and separately compiled object files as \
3130 set_cmd_completer (c
, filename_completer
);
3132 c
= add_cmd ("paths", no_class
, path_info
, _("\
3133 Current search path for finding object files.\n\
3134 $cwd in the path means the current working directory.\n\
3135 This path is equivalent to the $PATH shell variable. It is a list of\n\
3136 directories, separated by colons. These directories are searched to find\n\
3137 fully linked executable files and separately compiled object files as \
3140 set_cmd_completer (c
, noop_completer
);
3142 add_prefix_cmd ("kill", class_run
, kill_command
,
3143 _("Kill execution of program being debugged."),
3144 &killlist
, "kill ", 0, &cmdlist
);
3146 add_com ("attach", class_run
, attach_command
, _("\
3147 Attach to a process or file outside of GDB.\n\
3148 This command attaches to another target, of the same type as your last\n\
3149 \"target\" command (\"info files\" will show your target stack).\n\
3150 The command may take as argument a process id or a device file.\n\
3151 For a process id, you must have permission to send the process a signal,\n\
3152 and it must have the same effective uid as the debugger.\n\
3153 When using \"attach\" with a process id, the debugger finds the\n\
3154 program running in the process, looking first in the current working\n\
3155 directory, or (if not found there) using the source file search path\n\
3156 (see the \"directory\" command). You can also use the \"file\" command\n\
3157 to specify the program, and to load its symbol table."));
3159 add_prefix_cmd ("detach", class_run
, detach_command
, _("\
3160 Detach a process or file previously attached.\n\
3161 If a process, it is no longer traced, and it continues its execution. If\n\
3162 you were debugging a file, the file is closed and gdb no longer accesses it."),
3163 &detachlist
, "detach ", 0, &cmdlist
);
3165 add_com ("disconnect", class_run
, disconnect_command
, _("\
3166 Disconnect from a target.\n\
3167 The target will wait for another debugger to connect. Not available for\n\
3170 c
= add_com ("signal", class_run
, signal_command
, _("\
3171 Continue program with the specified signal.\n\
3172 Usage: signal SIGNAL\n\
3173 The SIGNAL argument is processed the same as the handle command.\n\
3175 An argument of \"0\" means continue the program without sending it a signal.\n\
3176 This is useful in cases where the program stopped because of a signal,\n\
3177 and you want to resume the program while discarding the signal.\n\
3179 In a multi-threaded program the signal is delivered to, or discarded from,\n\
3180 the current thread only."));
3181 set_cmd_completer (c
, signal_completer
);
3183 c
= add_com ("queue-signal", class_run
, queue_signal_command
, _("\
3184 Queue a signal to be delivered to the current thread when it is resumed.\n\
3185 Usage: queue-signal SIGNAL\n\
3186 The SIGNAL argument is processed the same as the handle command.\n\
3187 It is an error if the handling state of SIGNAL is \"nopass\".\n\
3189 An argument of \"0\" means remove any currently queued signal from\n\
3190 the current thread. This is useful in cases where the program stopped\n\
3191 because of a signal, and you want to resume it while discarding the signal.\n\
3193 In a multi-threaded program the signal is queued with, or discarded from,\n\
3194 the current thread only."));
3195 set_cmd_completer (c
, signal_completer
);
3197 add_com ("stepi", class_run
, stepi_command
, _("\
3198 Step one instruction exactly.\n\
3200 Argument N means step N times (or till program stops for another \
3202 add_com_alias ("si", "stepi", class_run
, 0);
3204 add_com ("nexti", class_run
, nexti_command
, _("\
3205 Step one instruction, but proceed through subroutine calls.\n\
3207 Argument N means step N times (or till program stops for another \
3209 add_com_alias ("ni", "nexti", class_run
, 0);
3211 add_com ("finish", class_run
, finish_command
, _("\
3212 Execute until selected stack frame returns.\n\
3214 Upon return, the value returned is printed and put in the value history."));
3215 add_com_alias ("fin", "finish", class_run
, 1);
3217 add_com ("next", class_run
, next_command
, _("\
3218 Step program, proceeding through subroutine calls.\n\
3220 Unlike \"step\", if the current source line calls a subroutine,\n\
3221 this command does not enter the subroutine, but instead steps over\n\
3222 the call, in effect treating it as a single source line."));
3223 add_com_alias ("n", "next", class_run
, 1);
3225 add_com ("step", class_run
, step_command
, _("\
3226 Step program until it reaches a different source line.\n\
3228 Argument N means step N times (or till program stops for another \
3230 add_com_alias ("s", "step", class_run
, 1);
3232 c
= add_com ("until", class_run
, until_command
, _("\
3233 Execute until past the current line or past a LOCATION.\n\
3234 Execute until the program reaches a source line greater than the current\n\
3235 or a specified location (same args as break command) within the current \
3237 set_cmd_completer (c
, location_completer
);
3238 add_com_alias ("u", "until", class_run
, 1);
3240 c
= add_com ("advance", class_run
, advance_command
, _("\
3241 Continue the program up to the given location (same form as args for break \
3243 Execution will also stop upon exit from the current stack frame."));
3244 set_cmd_completer (c
, location_completer
);
3246 c
= add_com ("jump", class_run
, jump_command
, _("\
3247 Continue program being debugged at specified line or address.\n\
3248 Usage: jump LOCATION\n\
3249 Give as argument either LINENUM or *ADDR, where ADDR is an expression\n\
3250 for an address to start at."));
3251 set_cmd_completer (c
, location_completer
);
3252 add_com_alias ("j", "jump", class_run
, 1);
3254 add_com ("continue", class_run
, continue_command
, _("\
3255 Continue program being debugged, after signal or breakpoint.\n\
3256 Usage: continue [N]\n\
3257 If proceeding from breakpoint, a number N may be used as an argument,\n\
3258 which means to set the ignore count of that breakpoint to N - 1 (so that\n\
3259 the breakpoint won't break until the Nth time it is reached).\n\
3261 If non-stop mode is enabled, continue only the current thread,\n\
3262 otherwise all the threads in the program are continued. To \n\
3263 continue all stopped threads in non-stop mode, use the -a option.\n\
3264 Specifying -a and an ignore count simultaneously is an error."));
3265 add_com_alias ("c", "cont", class_run
, 1);
3266 add_com_alias ("fg", "cont", class_run
, 1);
3268 c
= add_com ("run", class_run
, run_command
, _("\
3269 Start debugged program.\n"
3271 set_cmd_completer (c
, filename_completer
);
3272 add_com_alias ("r", "run", class_run
, 1);
3274 c
= add_com ("start", class_run
, start_command
, _("\
3275 Start the debugged program stopping at the beginning of the main procedure.\n"
3277 set_cmd_completer (c
, filename_completer
);
3279 c
= add_com ("starti", class_run
, starti_command
, _("\
3280 Start the debugged program stopping at the first instruction.\n"
3282 set_cmd_completer (c
, filename_completer
);
3284 add_com ("interrupt", class_run
, interrupt_command
,
3285 _("Interrupt the execution of the debugged program.\n\
3286 If non-stop mode is enabled, interrupt only the current thread,\n\
3287 otherwise all the threads in the program are stopped. To \n\
3288 interrupt all running threads in non-stop mode, use the -a option."));
3290 c
= add_info ("registers", info_registers_command
, _("\
3291 List of integer registers and their contents, for selected stack frame.\n\
3292 One or more register names as argument means describe the given registers.\n\
3293 One or more register group names as argument means describe the registers\n\
3294 in the named register groups."));
3295 add_info_alias ("r", "registers", 1);
3296 set_cmd_completer (c
, reg_or_group_completer
);
3298 c
= add_info ("all-registers", info_all_registers_command
, _("\
3299 List of all registers and their contents, for selected stack frame.\n\
3300 One or more register names as argument means describe the given registers.\n\
3301 One or more register group names as argument means describe the registers\n\
3302 in the named register groups."));
3303 set_cmd_completer (c
, reg_or_group_completer
);
3305 add_info ("program", info_program_command
,
3306 _("Execution status of the program."));
3308 add_info ("float", info_float_command
,
3309 _("Print the status of the floating point unit."));
3311 add_info ("vector", info_vector_command
,
3312 _("Print the status of the vector unit."));
3314 add_prefix_cmd ("proc", class_info
, info_proc_cmd
,
3316 Show additional information about a process.\n\
3317 Specify any process id, or use the program being debugged by default."),
3318 &info_proc_cmdlist
, "info proc ",
3319 1/*allow-unknown*/, &infolist
);
3321 add_cmd ("mappings", class_info
, info_proc_cmd_mappings
, _("\
3322 List memory regions mapped by the specified process."),
3323 &info_proc_cmdlist
);
3325 add_cmd ("stat", class_info
, info_proc_cmd_stat
, _("\
3326 List process info from /proc/PID/stat."),
3327 &info_proc_cmdlist
);
3329 add_cmd ("status", class_info
, info_proc_cmd_status
, _("\
3330 List process info from /proc/PID/status."),
3331 &info_proc_cmdlist
);
3333 add_cmd ("cwd", class_info
, info_proc_cmd_cwd
, _("\
3334 List current working directory of the specified process."),
3335 &info_proc_cmdlist
);
3337 add_cmd ("cmdline", class_info
, info_proc_cmd_cmdline
, _("\
3338 List command line arguments of the specified process."),
3339 &info_proc_cmdlist
);
3341 add_cmd ("exe", class_info
, info_proc_cmd_exe
, _("\
3342 List absolute filename for executable of the specified process."),
3343 &info_proc_cmdlist
);
3345 add_cmd ("files", class_info
, info_proc_cmd_files
, _("\
3346 List files opened by the specified process."),
3347 &info_proc_cmdlist
);
3349 add_cmd ("all", class_info
, info_proc_cmd_all
, _("\
3350 List all available info about the specified process."),
3351 &info_proc_cmdlist
);
3353 add_setshow_boolean_cmd ("finish", class_support
,
3354 &user_print_options
.finish_print
, _("\
3355 Set whether `finish' prints the return value."), _("\
3356 Show whether `finish' prints the return value."), NULL
,
3359 &setprintlist
, &showprintlist
);