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 /* There's a problem in gcc (PR gcc/98780) that causes missing line
1017 table entries, which results in a too large stepping range.
1018 Use inlined_subroutine info to make the range more narrow. */
1019 if (inline_skipped_frames (tp
) > 0)
1021 symbol
*sym
= inline_skipped_symbol (tp
);
1022 if (SYMBOL_CLASS (sym
) == LOC_BLOCK
)
1024 const block
*block
= SYMBOL_BLOCK_VALUE (sym
);
1025 if (BLOCK_END (block
) < tp
->control
.step_range_end
)
1026 tp
->control
.step_range_end
= BLOCK_END (block
);
1030 tp
->control
.may_range_step
= 1;
1032 /* If we have no line info, switch to stepi mode. */
1033 if (tp
->control
.step_range_end
== 0 && step_stop_if_no_debug
)
1035 tp
->control
.step_range_start
= tp
->control
.step_range_end
= 1;
1036 tp
->control
.may_range_step
= 0;
1038 else if (tp
->control
.step_range_end
== 0)
1042 if (find_pc_partial_function (pc
, &name
,
1043 &tp
->control
.step_range_start
,
1044 &tp
->control
.step_range_end
) == 0)
1045 error (_("Cannot find bounds of current function"));
1047 target_terminal::ours_for_output ();
1048 printf_filtered (_("Single stepping until exit from function %s,"
1049 "\nwhich has no line number information.\n"),
1055 /* Say we are stepping, but stop after one insn whatever it does. */
1056 tp
->control
.step_range_start
= tp
->control
.step_range_end
= 1;
1057 if (!sm
->skip_subroutines
)
1059 Don't step over function calls, not even to functions lacking
1061 tp
->control
.step_over_calls
= STEP_OVER_NONE
;
1064 if (sm
->skip_subroutines
)
1065 tp
->control
.step_over_calls
= STEP_OVER_ALL
;
1071 sm
->set_finished ();
1076 /* Continue program at specified address. */
1079 jump_command (const char *arg
, int from_tty
)
1081 struct gdbarch
*gdbarch
= get_current_arch ();
1088 ensure_not_tfind_mode ();
1089 ensure_valid_thread ();
1090 ensure_not_running ();
1092 /* Find out whether we must run in the background. */
1093 gdb::unique_xmalloc_ptr
<char> stripped
= strip_bg_char (arg
, &async_exec
);
1094 arg
= stripped
.get ();
1096 prepare_execution_command (current_inferior ()->top_target (), async_exec
);
1099 error_no_arg (_("starting address"));
1101 std::vector
<symtab_and_line
> sals
1102 = decode_line_with_last_displayed (arg
, DECODE_LINE_FUNFIRSTLINE
);
1103 if (sals
.size () != 1)
1104 error (_("Unreasonable jump request"));
1106 symtab_and_line
&sal
= sals
[0];
1108 if (sal
.symtab
== 0 && sal
.pc
== 0)
1109 error (_("No source file has been specified."));
1111 resolve_sal_pc (&sal
); /* May error out. */
1113 /* See if we are trying to jump to another function. */
1114 fn
= get_frame_function (get_current_frame ());
1115 sfn
= find_pc_function (sal
.pc
);
1116 if (fn
!= NULL
&& sfn
!= fn
)
1118 if (!query (_("Line %d is not in `%s'. Jump anyway? "), sal
.line
,
1121 error (_("Not confirmed."));
1128 struct obj_section
*section
;
1130 fixup_symbol_section (sfn
, 0);
1131 section
= sfn
->obj_section (symbol_objfile (sfn
));
1132 if (section_is_overlay (section
)
1133 && !section_is_mapped (section
))
1135 if (!query (_("WARNING!!! Destination is in "
1136 "unmapped overlay! Jump anyway? ")))
1138 error (_("Not confirmed."));
1148 printf_filtered (_("Continuing at "));
1149 fputs_filtered (paddress (gdbarch
, addr
), gdb_stdout
);
1150 printf_filtered (".\n");
1153 clear_proceed_status (0);
1154 proceed (addr
, GDB_SIGNAL_0
);
1157 /* Continue program giving it specified signal. */
1160 signal_command (const char *signum_exp
, int from_tty
)
1162 enum gdb_signal oursig
;
1165 dont_repeat (); /* Too dangerous. */
1167 ensure_not_tfind_mode ();
1168 ensure_valid_thread ();
1169 ensure_not_running ();
1171 /* Find out whether we must run in the background. */
1172 gdb::unique_xmalloc_ptr
<char> stripped
1173 = strip_bg_char (signum_exp
, &async_exec
);
1174 signum_exp
= stripped
.get ();
1176 prepare_execution_command (current_inferior ()->top_target (), async_exec
);
1179 error_no_arg (_("signal number"));
1181 /* It would be even slicker to make signal names be valid expressions,
1182 (the type could be "enum $signal" or some such), then the user could
1183 assign them to convenience variables. */
1184 oursig
= gdb_signal_from_name (signum_exp
);
1186 if (oursig
== GDB_SIGNAL_UNKNOWN
)
1188 /* No, try numeric. */
1189 int num
= parse_and_eval_long (signum_exp
);
1192 oursig
= GDB_SIGNAL_0
;
1194 oursig
= gdb_signal_from_command (num
);
1197 /* Look for threads other than the current that this command ends up
1198 resuming too (due to schedlock off), and warn if they'll get a
1199 signal delivered. "signal 0" is used to suppress a previous
1200 signal, but if the current thread is no longer the one that got
1201 the signal, then the user is potentially suppressing the signal
1202 of the wrong thread. */
1205 int must_confirm
= 0;
1207 /* This indicates what will be resumed. Either a single thread,
1208 a whole process, or all threads of all processes. */
1209 ptid_t resume_ptid
= user_visible_resume_ptid (0);
1210 process_stratum_target
*resume_target
1211 = user_visible_resume_target (resume_ptid
);
1213 thread_info
*current
= inferior_thread ();
1215 for (thread_info
*tp
: all_non_exited_threads (resume_target
, resume_ptid
))
1220 if (tp
->suspend
.stop_signal
!= GDB_SIGNAL_0
1221 && signal_pass_state (tp
->suspend
.stop_signal
))
1224 printf_unfiltered (_("Note:\n"));
1225 printf_unfiltered (_(" Thread %s previously stopped with signal %s, %s.\n"),
1226 print_thread_id (tp
),
1227 gdb_signal_to_name (tp
->suspend
.stop_signal
),
1228 gdb_signal_to_string (tp
->suspend
.stop_signal
));
1234 && !query (_("Continuing thread %s (the current thread) with specified signal will\n"
1235 "still deliver the signals noted above to their respective threads.\n"
1236 "Continue anyway? "),
1237 print_thread_id (inferior_thread ())))
1238 error (_("Not confirmed."));
1243 if (oursig
== GDB_SIGNAL_0
)
1244 printf_filtered (_("Continuing with no signal.\n"));
1246 printf_filtered (_("Continuing with signal %s.\n"),
1247 gdb_signal_to_name (oursig
));
1250 clear_proceed_status (0);
1251 proceed ((CORE_ADDR
) -1, oursig
);
1254 /* Queue a signal to be delivered to the current thread. */
1257 queue_signal_command (const char *signum_exp
, int from_tty
)
1259 enum gdb_signal oursig
;
1260 struct thread_info
*tp
;
1263 ensure_not_tfind_mode ();
1264 ensure_valid_thread ();
1265 ensure_not_running ();
1267 if (signum_exp
== NULL
)
1268 error_no_arg (_("signal number"));
1270 /* It would be even slicker to make signal names be valid expressions,
1271 (the type could be "enum $signal" or some such), then the user could
1272 assign them to convenience variables. */
1273 oursig
= gdb_signal_from_name (signum_exp
);
1275 if (oursig
== GDB_SIGNAL_UNKNOWN
)
1277 /* No, try numeric. */
1278 int num
= parse_and_eval_long (signum_exp
);
1281 oursig
= GDB_SIGNAL_0
;
1283 oursig
= gdb_signal_from_command (num
);
1286 if (oursig
!= GDB_SIGNAL_0
1287 && !signal_pass_state (oursig
))
1288 error (_("Signal handling set to not pass this signal to the program."));
1290 tp
= inferior_thread ();
1291 tp
->suspend
.stop_signal
= oursig
;
1294 /* Data for the FSM that manages the until (with no argument)
1297 struct until_next_fsm
: public thread_fsm
1299 /* The thread that as current when the command was executed. */
1302 until_next_fsm (struct interp
*cmd_interp
, int thread
)
1303 : thread_fsm (cmd_interp
),
1308 bool should_stop (struct thread_info
*thread
) override
;
1309 void clean_up (struct thread_info
*thread
) override
;
1310 enum async_reply_reason
do_async_reply_reason () override
;
1313 /* Implementation of the 'should_stop' FSM method for the until (with
1317 until_next_fsm::should_stop (struct thread_info
*tp
)
1319 if (tp
->control
.stop_step
)
1325 /* Implementation of the 'clean_up' FSM method for the until (with no
1329 until_next_fsm::clean_up (struct thread_info
*thread
)
1331 delete_longjmp_breakpoint (thread
->global_num
);
1334 /* Implementation of the 'async_reply_reason' FSM method for the until
1335 (with no arg) command. */
1337 enum async_reply_reason
1338 until_next_fsm::do_async_reply_reason ()
1340 return EXEC_ASYNC_END_STEPPING_RANGE
;
1343 /* Proceed until we reach a different source line with pc greater than
1344 our current one or exit the function. We skip calls in both cases.
1346 Note that eventually this command should probably be changed so
1347 that only source lines are printed out when we hit the breakpoint
1348 we set. This may involve changes to wait_for_inferior and the
1349 proceed status code. */
1352 until_next_command (int from_tty
)
1354 struct frame_info
*frame
;
1356 struct symbol
*func
;
1357 struct symtab_and_line sal
;
1358 struct thread_info
*tp
= inferior_thread ();
1359 int thread
= tp
->global_num
;
1360 struct until_next_fsm
*sm
;
1362 clear_proceed_status (0);
1363 set_step_frame (tp
);
1365 frame
= get_current_frame ();
1367 /* Step until either exited from this function or greater
1368 than the current line (if in symbolic section) or pc (if
1371 pc
= get_frame_pc (frame
);
1372 func
= find_pc_function (pc
);
1376 struct bound_minimal_symbol msymbol
= lookup_minimal_symbol_by_pc (pc
);
1378 if (msymbol
.minsym
== NULL
)
1379 error (_("Execution is not within a known function."));
1381 tp
->control
.step_range_start
= BMSYMBOL_VALUE_ADDRESS (msymbol
);
1382 /* The upper-bound of step_range is exclusive. In order to make PC
1383 within the range, set the step_range_end with PC + 1. */
1384 tp
->control
.step_range_end
= pc
+ 1;
1388 sal
= find_pc_line (pc
, 0);
1390 tp
->control
.step_range_start
= BLOCK_ENTRY_PC (SYMBOL_BLOCK_VALUE (func
));
1391 tp
->control
.step_range_end
= sal
.end
;
1393 tp
->control
.may_range_step
= 1;
1395 tp
->control
.step_over_calls
= STEP_OVER_ALL
;
1397 set_longjmp_breakpoint (tp
, get_frame_id (frame
));
1398 delete_longjmp_breakpoint_cleanup
lj_deleter (thread
);
1400 sm
= new until_next_fsm (command_interp (), tp
->global_num
);
1401 tp
->thread_fsm
= sm
;
1402 lj_deleter
.release ();
1404 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
1408 until_command (const char *arg
, int from_tty
)
1413 ensure_not_tfind_mode ();
1414 ensure_valid_thread ();
1415 ensure_not_running ();
1417 /* Find out whether we must run in the background. */
1418 gdb::unique_xmalloc_ptr
<char> stripped
= strip_bg_char (arg
, &async_exec
);
1419 arg
= stripped
.get ();
1421 prepare_execution_command (current_inferior ()->top_target (), async_exec
);
1424 until_break_command (arg
, from_tty
, 0);
1426 until_next_command (from_tty
);
1430 advance_command (const char *arg
, int from_tty
)
1435 ensure_not_tfind_mode ();
1436 ensure_valid_thread ();
1437 ensure_not_running ();
1440 error_no_arg (_("a location"));
1442 /* Find out whether we must run in the background. */
1443 gdb::unique_xmalloc_ptr
<char> stripped
= strip_bg_char (arg
, &async_exec
);
1444 arg
= stripped
.get ();
1446 prepare_execution_command (current_inferior ()->top_target (), async_exec
);
1448 until_break_command (arg
, from_tty
, 1);
1451 /* Return the value of the result of a function at the end of a 'finish'
1452 command/BP. DTOR_DATA (if not NULL) can represent inferior registers
1453 right after an inferior call has finished. */
1456 get_return_value (struct value
*function
, struct type
*value_type
)
1458 regcache
*stop_regs
= get_current_regcache ();
1459 struct gdbarch
*gdbarch
= stop_regs
->arch ();
1460 struct value
*value
;
1462 value_type
= check_typedef (value_type
);
1463 gdb_assert (value_type
->code () != TYPE_CODE_VOID
);
1465 /* FIXME: 2003-09-27: When returning from a nested inferior function
1466 call, it's possible (with no help from the architecture vector)
1467 to locate and return/print a "struct return" value. This is just
1468 a more complicated case of what is already being done in the
1469 inferior function call code. In fact, when inferior function
1470 calls are made async, this will likely be made the norm. */
1472 switch (gdbarch_return_value (gdbarch
, function
, value_type
,
1475 case RETURN_VALUE_REGISTER_CONVENTION
:
1476 case RETURN_VALUE_ABI_RETURNS_ADDRESS
:
1477 case RETURN_VALUE_ABI_PRESERVES_ADDRESS
:
1478 value
= allocate_value (value_type
);
1479 gdbarch_return_value (gdbarch
, function
, value_type
, stop_regs
,
1480 value_contents_raw (value
), NULL
);
1482 case RETURN_VALUE_STRUCT_CONVENTION
:
1486 internal_error (__FILE__
, __LINE__
, _("bad switch"));
1492 /* The captured function return value/type and its position in the
1495 struct return_value_info
1497 /* The captured return value. May be NULL if we weren't able to
1498 retrieve it. See get_return_value. */
1499 struct value
*value
;
1501 /* The return type. In some cases, we'll not be able extract the
1502 return value, but we always know the type. */
1505 /* If we captured a value, this is the value history index. */
1506 int value_history_index
;
1509 /* Helper for print_return_value. */
1512 print_return_value_1 (struct ui_out
*uiout
, struct return_value_info
*rv
)
1514 if (rv
->value
!= NULL
)
1516 struct value_print_options opts
;
1519 uiout
->text ("Value returned is ");
1520 uiout
->field_fmt ("gdb-result-var", "$%d",
1521 rv
->value_history_index
);
1522 uiout
->text (" = ");
1523 get_user_print_options (&opts
);
1525 if (opts
.finish_print
)
1528 value_print (rv
->value
, &stb
, &opts
);
1529 uiout
->field_stream ("return-value", stb
);
1532 uiout
->field_string ("return-value", _("<not displayed>"),
1533 metadata_style
.style ());
1538 std::string type_name
= type_to_string (rv
->type
);
1539 uiout
->text ("Value returned has type: ");
1540 uiout
->field_string ("return-type", type_name
.c_str ());
1542 uiout
->text (" Cannot determine contents\n");
1546 /* Print the result of a function at the end of a 'finish' command.
1547 RV points at an object representing the captured return value/type
1548 and its position in the value history. */
1551 print_return_value (struct ui_out
*uiout
, struct return_value_info
*rv
)
1553 if (rv
->type
== NULL
1554 || check_typedef (rv
->type
)->code () == TYPE_CODE_VOID
)
1559 /* print_return_value_1 can throw an exception in some
1560 circumstances. We need to catch this so that we still
1561 delete the breakpoint. */
1562 print_return_value_1 (uiout
, rv
);
1564 catch (const gdb_exception
&ex
)
1566 exception_print (gdb_stdout
, ex
);
1570 /* Data for the FSM that manages the finish command. */
1572 struct finish_command_fsm
: public thread_fsm
1574 /* The momentary breakpoint set at the function's return address in
1576 breakpoint_up breakpoint
;
1578 /* The function that we're stepping out of. */
1579 struct symbol
*function
= nullptr;
1581 /* If the FSM finishes successfully, this stores the function's
1583 struct return_value_info return_value_info
{};
1585 explicit finish_command_fsm (struct interp
*cmd_interp
)
1586 : thread_fsm (cmd_interp
)
1590 bool should_stop (struct thread_info
*thread
) override
;
1591 void clean_up (struct thread_info
*thread
) override
;
1592 struct return_value_info
*return_value () override
;
1593 enum async_reply_reason
do_async_reply_reason () override
;
1596 /* Implementation of the 'should_stop' FSM method for the finish
1597 commands. Detects whether the thread stepped out of the function
1598 successfully, and if so, captures the function's return value and
1599 marks the FSM finished. */
1602 finish_command_fsm::should_stop (struct thread_info
*tp
)
1604 struct return_value_info
*rv
= &return_value_info
;
1606 if (function
!= NULL
1607 && bpstat_find_breakpoint (tp
->control
.stop_bpstat
,
1608 breakpoint
.get ()) != NULL
)
1613 rv
->type
= TYPE_TARGET_TYPE (SYMBOL_TYPE (function
));
1614 if (rv
->type
== NULL
)
1615 internal_error (__FILE__
, __LINE__
,
1616 _("finish_command: function has no target type"));
1618 if (check_typedef (rv
->type
)->code () != TYPE_CODE_VOID
)
1622 func
= read_var_value (function
, NULL
, get_current_frame ());
1623 rv
->value
= get_return_value (func
, rv
->type
);
1624 if (rv
->value
!= NULL
)
1625 rv
->value_history_index
= record_latest_value (rv
->value
);
1628 else if (tp
->control
.stop_step
)
1630 /* Finishing from an inline frame, or reverse finishing. In
1631 either case, there's no way to retrieve the return value. */
1638 /* Implementation of the 'clean_up' FSM method for the finish
1642 finish_command_fsm::clean_up (struct thread_info
*thread
)
1644 breakpoint
.reset ();
1645 delete_longjmp_breakpoint (thread
->global_num
);
1648 /* Implementation of the 'return_value' FSM method for the finish
1651 struct return_value_info
*
1652 finish_command_fsm::return_value ()
1654 return &return_value_info
;
1657 /* Implementation of the 'async_reply_reason' FSM method for the
1660 enum async_reply_reason
1661 finish_command_fsm::do_async_reply_reason ()
1663 if (execution_direction
== EXEC_REVERSE
)
1664 return EXEC_ASYNC_END_STEPPING_RANGE
;
1666 return EXEC_ASYNC_FUNCTION_FINISHED
;
1669 /* finish_backward -- helper function for finish_command. */
1672 finish_backward (struct finish_command_fsm
*sm
)
1674 struct symtab_and_line sal
;
1675 struct thread_info
*tp
= inferior_thread ();
1677 CORE_ADDR func_addr
;
1679 pc
= get_frame_pc (get_current_frame ());
1681 if (find_pc_partial_function (pc
, NULL
, &func_addr
, NULL
) == 0)
1682 error (_("Cannot find bounds of current function"));
1684 sal
= find_pc_line (func_addr
, 0);
1686 tp
->control
.proceed_to_finish
= 1;
1687 /* Special case: if we're sitting at the function entry point,
1688 then all we need to do is take a reverse singlestep. We
1689 don't need to set a breakpoint, and indeed it would do us
1692 Note that this can only happen at frame #0, since there's
1693 no way that a function up the stack can have a return address
1694 that's equal to its entry point. */
1698 struct frame_info
*frame
= get_selected_frame (NULL
);
1699 struct gdbarch
*gdbarch
= get_frame_arch (frame
);
1701 /* Set a step-resume at the function's entry point. Once that's
1702 hit, we'll do one more step backwards. */
1703 symtab_and_line sr_sal
;
1705 sr_sal
.pspace
= get_frame_program_space (frame
);
1706 insert_step_resume_breakpoint_at_sal (gdbarch
,
1707 sr_sal
, null_frame_id
);
1709 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
1713 /* We're almost there -- we just need to back up by one more
1715 tp
->control
.step_range_start
= tp
->control
.step_range_end
= 1;
1716 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
1720 /* finish_forward -- helper function for finish_command. FRAME is the
1721 frame that called the function we're about to step out of. */
1724 finish_forward (struct finish_command_fsm
*sm
, struct frame_info
*frame
)
1726 struct frame_id frame_id
= get_frame_id (frame
);
1727 struct gdbarch
*gdbarch
= get_frame_arch (frame
);
1728 struct symtab_and_line sal
;
1729 struct thread_info
*tp
= inferior_thread ();
1731 sal
= find_pc_line (get_frame_pc (frame
), 0);
1732 sal
.pc
= get_frame_pc (frame
);
1734 sm
->breakpoint
= set_momentary_breakpoint (gdbarch
, sal
,
1735 get_stack_frame_id (frame
),
1738 /* set_momentary_breakpoint invalidates FRAME. */
1741 set_longjmp_breakpoint (tp
, frame_id
);
1743 /* We want to print return value, please... */
1744 tp
->control
.proceed_to_finish
= 1;
1746 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
1749 /* Skip frames for "finish". */
1751 static struct frame_info
*
1752 skip_finish_frames (struct frame_info
*frame
)
1754 struct frame_info
*start
;
1760 frame
= skip_tailcall_frames (frame
);
1764 frame
= skip_unwritable_frames (frame
);
1768 while (start
!= frame
);
1773 /* "finish": Set a temporary breakpoint at the place the selected
1774 frame will return to, then continue. */
1777 finish_command (const char *arg
, int from_tty
)
1779 struct frame_info
*frame
;
1781 struct finish_command_fsm
*sm
;
1782 struct thread_info
*tp
;
1785 ensure_not_tfind_mode ();
1786 ensure_valid_thread ();
1787 ensure_not_running ();
1789 /* Find out whether we must run in the background. */
1790 gdb::unique_xmalloc_ptr
<char> stripped
= strip_bg_char (arg
, &async_exec
);
1791 arg
= stripped
.get ();
1793 prepare_execution_command (current_inferior ()->top_target (), async_exec
);
1796 error (_("The \"finish\" command does not take any arguments."));
1798 frame
= get_prev_frame (get_selected_frame (_("No selected frame.")));
1800 error (_("\"finish\" not meaningful in the outermost frame."));
1802 clear_proceed_status (0);
1804 tp
= inferior_thread ();
1806 sm
= new finish_command_fsm (command_interp ());
1808 tp
->thread_fsm
= sm
;
1810 /* Finishing from an inline frame is completely different. We don't
1811 try to show the "return value" - no way to locate it. */
1812 if (get_frame_type (get_selected_frame (_("No selected frame.")))
1815 /* Claim we are stepping in the calling frame. An empty step
1816 range means that we will stop once we aren't in a function
1817 called by that frame. We don't use the magic "1" value for
1818 step_range_end, because then infrun will think this is nexti,
1819 and not step over the rest of this inlined function call. */
1820 set_step_info (tp
, frame
, {});
1821 tp
->control
.step_range_start
= get_frame_pc (frame
);
1822 tp
->control
.step_range_end
= tp
->control
.step_range_start
;
1823 tp
->control
.step_over_calls
= STEP_OVER_ALL
;
1825 /* Print info on the selected frame, including level number but not
1829 printf_filtered (_("Run till exit from "));
1830 print_stack_frame (get_selected_frame (NULL
), 1, LOCATION
, 0);
1833 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
1837 /* Find the function we will return from. */
1839 sm
->function
= find_pc_function (get_frame_pc (get_selected_frame (NULL
)));
1841 /* Print info on the selected frame, including level number but not
1845 if (execution_direction
== EXEC_REVERSE
)
1846 printf_filtered (_("Run back to call of "));
1849 if (sm
->function
!= NULL
&& TYPE_NO_RETURN (sm
->function
->type
)
1850 && !query (_("warning: Function %s does not return normally.\n"
1851 "Try to finish anyway? "),
1852 sm
->function
->print_name ()))
1853 error (_("Not confirmed."));
1854 printf_filtered (_("Run till exit from "));
1857 print_stack_frame (get_selected_frame (NULL
), 1, LOCATION
, 0);
1860 if (execution_direction
== EXEC_REVERSE
)
1861 finish_backward (sm
);
1864 frame
= skip_finish_frames (frame
);
1867 error (_("Cannot find the caller frame."));
1869 finish_forward (sm
, frame
);
1875 info_program_command (const char *args
, int from_tty
)
1880 process_stratum_target
*proc_target
;
1882 if (!target_has_execution ())
1884 printf_filtered (_("The program being debugged is not being run.\n"));
1890 ptid
= inferior_ptid
;
1891 proc_target
= current_inferior ()->process_target ();
1894 get_last_target_status (&proc_target
, &ptid
, nullptr);
1896 if (ptid
== null_ptid
|| ptid
== minus_one_ptid
)
1897 error (_("No selected thread."));
1899 thread_info
*tp
= find_thread_ptid (proc_target
, ptid
);
1901 if (tp
->state
== THREAD_EXITED
)
1902 error (_("Invalid selected thread."));
1903 else if (tp
->state
== THREAD_RUNNING
)
1904 error (_("Selected thread is running."));
1906 bs
= tp
->control
.stop_bpstat
;
1907 stat
= bpstat_num (&bs
, &num
);
1909 target_files_info ();
1910 printf_filtered (_("Program stopped at %s.\n"),
1911 paddress (target_gdbarch (), tp
->suspend
.stop_pc
));
1912 if (tp
->control
.stop_step
)
1913 printf_filtered (_("It stopped after being stepped.\n"));
1916 /* There may be several breakpoints in the same place, so this
1917 isn't as strange as it seems. */
1922 printf_filtered (_("It stopped at a breakpoint "
1923 "that has since been deleted.\n"));
1926 printf_filtered (_("It stopped at breakpoint %d.\n"), num
);
1927 stat
= bpstat_num (&bs
, &num
);
1930 else if (tp
->suspend
.stop_signal
!= GDB_SIGNAL_0
)
1932 printf_filtered (_("It stopped with signal %s, %s.\n"),
1933 gdb_signal_to_name (tp
->suspend
.stop_signal
),
1934 gdb_signal_to_string (tp
->suspend
.stop_signal
));
1939 printf_filtered (_("Type \"info stack\" or \"info "
1940 "registers\" for more information.\n"));
1945 environment_info (const char *var
, int from_tty
)
1949 const char *val
= current_inferior ()->environment
.get (var
);
1953 puts_filtered (var
);
1954 puts_filtered (" = ");
1955 puts_filtered (val
);
1956 puts_filtered ("\n");
1960 puts_filtered ("Environment variable \"");
1961 puts_filtered (var
);
1962 puts_filtered ("\" not defined.\n");
1967 char **envp
= current_inferior ()->environment
.envp ();
1969 for (int idx
= 0; envp
[idx
] != NULL
; ++idx
)
1971 puts_filtered (envp
[idx
]);
1972 puts_filtered ("\n");
1978 set_environment_command (const char *arg
, int from_tty
)
1980 const char *p
, *val
;
1984 error_no_arg (_("environment variable and value"));
1986 /* Find separation between variable name and value. */
1987 p
= (char *) strchr (arg
, '=');
1988 val
= (char *) strchr (arg
, ' ');
1990 if (p
!= 0 && val
!= 0)
1992 /* We have both a space and an equals. If the space is before the
1993 equals, walk forward over the spaces til we see a nonspace
1994 (possibly the equals). */
1999 /* Now if the = is after the char following the spaces,
2000 take the char following the spaces. */
2004 else if (val
!= 0 && p
== 0)
2008 error_no_arg (_("environment variable to set"));
2010 if (p
== 0 || p
[1] == 0)
2014 p
= arg
+ strlen (arg
); /* So that savestring below will work. */
2018 /* Not setting variable value to null. */
2020 while (*val
== ' ' || *val
== '\t')
2024 while (p
!= arg
&& (p
[-1] == ' ' || p
[-1] == '\t'))
2027 std::string
var (arg
, p
- arg
);
2030 printf_filtered (_("Setting environment variable "
2031 "\"%s\" to null value.\n"),
2033 current_inferior ()->environment
.set (var
.c_str (), "");
2036 current_inferior ()->environment
.set (var
.c_str (), val
);
2040 unset_environment_command (const char *var
, int from_tty
)
2044 /* If there is no argument, delete all environment variables.
2045 Ask for confirmation if reading from the terminal. */
2046 if (!from_tty
|| query (_("Delete all environment variables? ")))
2047 current_inferior ()->environment
.clear ();
2050 current_inferior ()->environment
.unset (var
);
2053 /* Handle the execution path (PATH variable). */
2055 static const char path_var_name
[] = "PATH";
2058 path_info (const char *args
, int from_tty
)
2060 puts_filtered ("Executable and object file path: ");
2061 puts_filtered (current_inferior ()->environment
.get (path_var_name
));
2062 puts_filtered ("\n");
2065 /* Add zero or more directories to the front of the execution path. */
2068 path_command (const char *dirname
, int from_tty
)
2074 env
= current_inferior ()->environment
.get (path_var_name
);
2075 /* Can be null if path is not set. */
2078 exec_path
= xstrdup (env
);
2079 mod_path (dirname
, &exec_path
);
2080 current_inferior ()->environment
.set (path_var_name
, exec_path
);
2083 path_info (NULL
, from_tty
);
2088 pad_to_column (string_file
&stream
, int col
)
2090 /* At least one space must be printed to separate columns. */
2092 const int size
= stream
.size ();
2094 stream
.puts (n_spaces (col
- size
));
2097 /* Print out the register NAME with value VAL, to FILE, in the default
2101 default_print_one_register_info (struct ui_file
*file
,
2105 struct type
*regtype
= value_type (val
);
2106 int print_raw_format
;
2107 string_file format_stream
;
2110 value_column_1
= 15,
2111 /* Give enough room for "0x", 16 hex digits and two spaces in
2112 preceding column. */
2113 value_column_2
= value_column_1
+ 2 + 16 + 2,
2116 format_stream
.puts (name
);
2117 pad_to_column (format_stream
, value_column_1
);
2119 print_raw_format
= (value_entirely_available (val
)
2120 && !value_optimized_out (val
));
2122 /* If virtual format is floating, print it that way, and in raw
2124 if (regtype
->code () == TYPE_CODE_FLT
2125 || regtype
->code () == TYPE_CODE_DECFLOAT
)
2127 struct value_print_options opts
;
2128 const gdb_byte
*valaddr
= value_contents_for_printing (val
);
2129 enum bfd_endian byte_order
= type_byte_order (regtype
);
2131 get_user_print_options (&opts
);
2134 common_val_print (val
, &format_stream
, 0, &opts
, current_language
);
2136 if (print_raw_format
)
2138 pad_to_column (format_stream
, value_column_2
);
2139 format_stream
.puts ("(raw ");
2140 print_hex_chars (&format_stream
, valaddr
, TYPE_LENGTH (regtype
),
2142 format_stream
.putc (')');
2147 struct value_print_options opts
;
2149 /* Print the register in hex. */
2150 get_formatted_print_options (&opts
, 'x');
2152 common_val_print (val
, &format_stream
, 0, &opts
, current_language
);
2153 /* If not a vector register, print it also according to its
2155 if (print_raw_format
&& regtype
->is_vector () == 0)
2157 pad_to_column (format_stream
, value_column_2
);
2158 get_user_print_options (&opts
);
2160 common_val_print (val
, &format_stream
, 0, &opts
, current_language
);
2164 fputs_filtered (format_stream
.c_str (), file
);
2165 fprintf_filtered (file
, "\n");
2168 /* Print out the machine register regnum. If regnum is -1, print all
2169 registers (print_all == 1) or all non-float and non-vector
2170 registers (print_all == 0).
2172 For most machines, having all_registers_info() print the
2173 register(s) one per line is good enough. If a different format is
2174 required, (eg, for MIPS or Pyramid 90x, which both have lots of
2175 regs), or there is an existing convention for showing all the
2176 registers, define the architecture method PRINT_REGISTERS_INFO to
2177 provide that format. */
2180 default_print_registers_info (struct gdbarch
*gdbarch
,
2181 struct ui_file
*file
,
2182 struct frame_info
*frame
,
2183 int regnum
, int print_all
)
2186 const int numregs
= gdbarch_num_cooked_regs (gdbarch
);
2188 for (i
= 0; i
< numregs
; i
++)
2190 /* Decide between printing all regs, non-float / vector regs, or
2196 if (!gdbarch_register_reggroup_p (gdbarch
, i
, all_reggroup
))
2201 if (!gdbarch_register_reggroup_p (gdbarch
, i
, general_reggroup
))
2211 /* If the register name is empty, it is undefined for this
2212 processor, so don't display anything. */
2213 if (gdbarch_register_name (gdbarch
, i
) == NULL
2214 || *(gdbarch_register_name (gdbarch
, i
)) == '\0')
2217 default_print_one_register_info (file
,
2218 gdbarch_register_name (gdbarch
, i
),
2219 value_of_register (i
, frame
));
2224 registers_info (const char *addr_exp
, int fpregs
)
2226 struct frame_info
*frame
;
2227 struct gdbarch
*gdbarch
;
2229 if (!target_has_registers ())
2230 error (_("The program has no registers now."));
2231 frame
= get_selected_frame (NULL
);
2232 gdbarch
= get_frame_arch (frame
);
2236 gdbarch_print_registers_info (gdbarch
, gdb_stdout
,
2241 while (*addr_exp
!= '\0')
2246 /* Skip leading white space. */
2247 addr_exp
= skip_spaces (addr_exp
);
2249 /* Discard any leading ``$''. Check that there is something
2250 resembling a register following it. */
2251 if (addr_exp
[0] == '$')
2253 if (isspace ((*addr_exp
)) || (*addr_exp
) == '\0')
2254 error (_("Missing register name"));
2256 /* Find the start/end of this register name/num/group. */
2258 while ((*addr_exp
) != '\0' && !isspace ((*addr_exp
)))
2262 /* Figure out what we've found and display it. */
2264 /* A register name? */
2266 int regnum
= user_reg_map_name_to_regnum (gdbarch
, start
, end
- start
);
2270 /* User registers lie completely outside of the range of
2271 normal registers. Catch them early so that the target
2273 if (regnum
>= gdbarch_num_cooked_regs (gdbarch
))
2275 struct value
*regval
= value_of_user_reg (regnum
, frame
);
2276 const char *regname
= user_reg_map_regnum_to_name (gdbarch
,
2279 /* Print in the same fashion
2280 gdbarch_print_registers_info's default
2281 implementation prints. */
2282 default_print_one_register_info (gdb_stdout
,
2287 gdbarch_print_registers_info (gdbarch
, gdb_stdout
,
2288 frame
, regnum
, fpregs
);
2293 /* A register group? */
2295 struct reggroup
*group
;
2297 for (group
= reggroup_next (gdbarch
, NULL
);
2299 group
= reggroup_next (gdbarch
, group
))
2301 /* Don't bother with a length check. Should the user
2302 enter a short register group name, go with the first
2303 group that matches. */
2304 if (strncmp (start
, reggroup_name (group
), end
- start
) == 0)
2312 regnum
< gdbarch_num_cooked_regs (gdbarch
);
2315 if (gdbarch_register_reggroup_p (gdbarch
, regnum
, group
))
2316 gdbarch_print_registers_info (gdbarch
,
2324 /* Nothing matched. */
2325 error (_("Invalid register `%.*s'"), (int) (end
- start
), start
);
2330 info_all_registers_command (const char *addr_exp
, int from_tty
)
2332 registers_info (addr_exp
, 1);
2336 info_registers_command (const char *addr_exp
, int from_tty
)
2338 registers_info (addr_exp
, 0);
2342 print_vector_info (struct ui_file
*file
,
2343 struct frame_info
*frame
, const char *args
)
2345 struct gdbarch
*gdbarch
= get_frame_arch (frame
);
2347 if (gdbarch_print_vector_info_p (gdbarch
))
2348 gdbarch_print_vector_info (gdbarch
, file
, frame
, args
);
2352 int printed_something
= 0;
2354 for (regnum
= 0; regnum
< gdbarch_num_cooked_regs (gdbarch
); regnum
++)
2356 if (gdbarch_register_reggroup_p (gdbarch
, regnum
, vector_reggroup
))
2358 printed_something
= 1;
2359 gdbarch_print_registers_info (gdbarch
, file
, frame
, regnum
, 1);
2362 if (!printed_something
)
2363 fprintf_filtered (file
, "No vector information\n");
2368 info_vector_command (const char *args
, int from_tty
)
2370 if (!target_has_registers ())
2371 error (_("The program has no registers now."));
2373 print_vector_info (gdb_stdout
, get_selected_frame (NULL
), args
);
2376 /* Kill the inferior process. Make us have no inferior. */
2379 kill_command (const char *arg
, int from_tty
)
2381 /* FIXME: This should not really be inferior_ptid (or target_has_execution).
2382 It should be a distinct flag that indicates that a target is active, cuz
2383 some targets don't have processes! */
2385 if (inferior_ptid
== null_ptid
)
2386 error (_("The program is not being run."));
2387 if (!query (_("Kill the program being debugged? ")))
2388 error (_("Not confirmed."));
2390 int pid
= current_inferior ()->pid
;
2391 /* Save the pid as a string before killing the inferior, since that
2392 may unpush the current target, and we need the string after. */
2393 std::string pid_str
= target_pid_to_str (ptid_t (pid
));
2394 int infnum
= current_inferior ()->num
;
2398 if (print_inferior_events
)
2399 printf_unfiltered (_("[Inferior %d (%s) killed]\n"),
2400 infnum
, pid_str
.c_str ());
2402 bfd_cache_close_all ();
2405 /* Used in `attach&' command. Proceed threads of inferior INF iff
2406 they stopped due to debugger request, and when they did, they
2407 reported a clean stop (GDB_SIGNAL_0). Do not proceed threads that
2408 have been explicitly been told to stop. */
2411 proceed_after_attach (inferior
*inf
)
2413 /* Don't error out if the current thread is running, because
2414 there may be other stopped threads. */
2416 /* Backup current thread and selected frame. */
2417 scoped_restore_current_thread restore_thread
;
2419 for (thread_info
*thread
: inf
->non_exited_threads ())
2420 if (!thread
->executing
2421 && !thread
->stop_requested
2422 && thread
->suspend
.stop_signal
== GDB_SIGNAL_0
)
2424 switch_to_thread (thread
);
2425 clear_proceed_status (0);
2426 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
2430 /* See inferior.h. */
2433 setup_inferior (int from_tty
)
2435 struct inferior
*inferior
;
2437 inferior
= current_inferior ();
2438 inferior
->needs_setup
= 0;
2440 /* If no exec file is yet known, try to determine it from the
2442 if (get_exec_file (0) == NULL
)
2443 exec_file_locate_attach (inferior_ptid
.pid (), 1, from_tty
);
2446 reopen_exec_file ();
2450 /* Take any necessary post-attaching actions for this platform. */
2451 target_post_attach (inferior_ptid
.pid ());
2453 post_create_inferior (from_tty
);
2456 /* What to do after the first program stops after attaching. */
2457 enum attach_post_wait_mode
2459 /* Do nothing. Leaves threads as they are. */
2460 ATTACH_POST_WAIT_NOTHING
,
2462 /* Re-resume threads that are marked running. */
2463 ATTACH_POST_WAIT_RESUME
,
2465 /* Stop all threads. */
2466 ATTACH_POST_WAIT_STOP
,
2469 /* Called after we've attached to a process and we've seen it stop for
2470 the first time. If ASYNC_EXEC is true, re-resume threads that
2471 should be running. Else if ATTACH, */
2474 attach_post_wait (const char *args
, int from_tty
, enum attach_post_wait_mode mode
)
2476 struct inferior
*inferior
;
2478 inferior
= current_inferior ();
2479 inferior
->control
.stop_soon
= NO_STOP_QUIETLY
;
2481 if (inferior
->needs_setup
)
2482 setup_inferior (from_tty
);
2484 if (mode
== ATTACH_POST_WAIT_RESUME
)
2486 /* The user requested an `attach&', so be sure to leave threads
2487 that didn't get a signal running. */
2489 /* Immediatelly resume all suspended threads of this inferior,
2490 and this inferior only. This should have no effect on
2491 already running threads. If a thread has been stopped with a
2492 signal, leave it be. */
2494 proceed_after_attach (inferior
);
2497 if (inferior_thread ()->suspend
.stop_signal
== GDB_SIGNAL_0
)
2499 clear_proceed_status (0);
2500 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
2504 else if (mode
== ATTACH_POST_WAIT_STOP
)
2506 /* The user requested a plain `attach', so be sure to leave
2507 the inferior stopped. */
2509 /* At least the current thread is already stopped. */
2511 /* In all-stop, by definition, all threads have to be already
2512 stopped at this point. In non-stop, however, although the
2513 selected thread is stopped, others may still be executing.
2514 Be sure to explicitly stop all threads of the process. This
2515 should have no effect on already stopped threads. */
2517 target_stop (ptid_t (inferior
->pid
));
2518 else if (target_is_non_stop_p ())
2520 struct thread_info
*lowest
= inferior_thread ();
2522 stop_all_threads ();
2524 /* It's not defined which thread will report the attach
2525 stop. For consistency, always select the thread with
2526 lowest GDB number, which should be the main thread, if it
2528 for (thread_info
*thread
: current_inferior ()->non_exited_threads ())
2529 if (thread
->inf
->num
< lowest
->inf
->num
2530 || thread
->per_inf_num
< lowest
->per_inf_num
)
2533 switch_to_thread (lowest
);
2536 /* Tell the user/frontend where we're stopped. */
2538 if (deprecated_attach_hook
)
2539 deprecated_attach_hook ();
2543 struct attach_command_continuation_args
2547 enum attach_post_wait_mode mode
;
2551 attach_command_continuation (void *args
, int err
)
2553 struct attach_command_continuation_args
*a
2554 = (struct attach_command_continuation_args
*) args
;
2559 attach_post_wait (a
->args
, a
->from_tty
, a
->mode
);
2563 attach_command_continuation_free_args (void *args
)
2565 struct attach_command_continuation_args
*a
2566 = (struct attach_command_continuation_args
*) args
;
2572 /* "attach" command entry point. Takes a program started up outside
2573 of gdb and ``attaches'' to it. This stops it cold in its tracks
2574 and allows us to start debugging it. */
2577 attach_command (const char *args
, int from_tty
)
2580 struct target_ops
*attach_target
;
2581 struct inferior
*inferior
= current_inferior ();
2582 enum attach_post_wait_mode mode
;
2584 dont_repeat (); /* Not for the faint of heart */
2586 scoped_disable_commit_resumed
disable_commit_resumed ("attaching");
2588 if (gdbarch_has_global_solist (target_gdbarch ()))
2589 /* Don't complain if all processes share the same symbol
2592 else if (target_has_execution ())
2594 if (query (_("A program is being debugged already. Kill it? ")))
2597 error (_("Not killed."));
2600 /* Clean up any leftovers from other runs. Some other things from
2601 this function should probably be moved into target_pre_inferior. */
2602 target_pre_inferior (from_tty
);
2604 gdb::unique_xmalloc_ptr
<char> stripped
= strip_bg_char (args
, &async_exec
);
2605 args
= stripped
.get ();
2607 attach_target
= find_attach_target ();
2609 prepare_execution_command (attach_target
, async_exec
);
2611 if (non_stop
&& !attach_target
->supports_non_stop ())
2612 error (_("Cannot attach to this target in non-stop mode"));
2614 attach_target
->attach (args
, from_tty
);
2615 /* to_attach should push the target, so after this point we
2616 shouldn't refer to attach_target again. */
2617 attach_target
= NULL
;
2619 /* Set up the "saved terminal modes" of the inferior
2620 based on what modes we are starting it with. */
2621 target_terminal::init ();
2623 /* Install inferior's terminal modes. This may look like a no-op,
2624 as we've just saved them above, however, this does more than
2625 restore terminal settings:
2627 - installs a SIGINT handler that forwards SIGINT to the inferior.
2628 Otherwise a Ctrl-C pressed just while waiting for the initial
2629 stop would end up as a spurious Quit.
2631 - removes stdin from the event loop, which we need if attaching
2632 in the foreground, otherwise on targets that report an initial
2633 stop on attach (which are most) we'd process input/commands
2634 while we're in the event loop waiting for that stop. That is,
2635 before the attach continuation runs and the command is really
2637 target_terminal::inferior ();
2639 /* Set up execution context to know that we should return from
2640 wait_for_inferior as soon as the target reports a stop. */
2641 init_wait_for_inferior ();
2643 inferior
->needs_setup
= 1;
2645 if (target_is_non_stop_p ())
2647 /* If we find that the current thread isn't stopped, explicitly
2648 do so now, because we're going to install breakpoints and
2652 /* The user requested an `attach&'; stop just one thread. */
2653 target_stop (inferior_ptid
);
2655 /* The user requested an `attach', so stop all threads of this
2657 target_stop (ptid_t (inferior_ptid
.pid ()));
2660 /* Check for exec file mismatch, and let the user solve it. */
2661 validate_exec_file (from_tty
);
2663 mode
= async_exec
? ATTACH_POST_WAIT_RESUME
: ATTACH_POST_WAIT_STOP
;
2665 /* Some system don't generate traps when attaching to inferior.
2666 E.g. Mach 3 or GNU hurd. */
2667 if (!target_attach_no_wait ())
2669 struct attach_command_continuation_args
*a
;
2671 /* Careful here. See comments in inferior.h. Basically some
2672 OSes don't ignore SIGSTOPs on continue requests anymore. We
2673 need a way for handle_inferior_event to reset the stop_signal
2674 variable after an attach, and this is what
2675 STOP_QUIETLY_NO_SIGSTOP is for. */
2676 inferior
->control
.stop_soon
= STOP_QUIETLY_NO_SIGSTOP
;
2678 /* Wait for stop. */
2679 a
= XNEW (struct attach_command_continuation_args
);
2680 a
->args
= xstrdup (args
);
2681 a
->from_tty
= from_tty
;
2683 add_inferior_continuation (attach_command_continuation
, a
,
2684 attach_command_continuation_free_args
);
2686 /* Let infrun consider waiting for events out of this
2688 inferior
->process_target ()->threads_executing
= true;
2690 if (!target_is_async_p ())
2691 mark_infrun_async_event_handler ();
2695 attach_post_wait (args
, from_tty
, mode
);
2697 disable_commit_resumed
.reset_and_commit ();
2700 /* We had just found out that the target was already attached to an
2701 inferior. PTID points at a thread of this new inferior, that is
2702 the most likely to be stopped right now, but not necessarily so.
2703 The new inferior is assumed to be already added to the inferior
2704 list at this point. If LEAVE_RUNNING, then leave the threads of
2705 this inferior running, except those we've explicitly seen reported
2709 notice_new_inferior (thread_info
*thr
, int leave_running
, int from_tty
)
2711 enum attach_post_wait_mode mode
2712 = leave_running
? ATTACH_POST_WAIT_RESUME
: ATTACH_POST_WAIT_NOTHING
;
2714 gdb::optional
<scoped_restore_current_thread
> restore_thread
;
2716 if (inferior_ptid
!= null_ptid
)
2717 restore_thread
.emplace ();
2719 /* Avoid reading registers -- we haven't fetched the target
2721 switch_to_thread_no_regs (thr
);
2723 /* When we "notice" a new inferior we need to do all the things we
2724 would normally do if we had just attached to it. */
2728 struct attach_command_continuation_args
*a
;
2729 struct inferior
*inferior
= current_inferior ();
2731 /* We're going to install breakpoints, and poke at memory,
2732 ensure that the inferior is stopped for a moment while we do
2734 target_stop (inferior_ptid
);
2736 inferior
->control
.stop_soon
= STOP_QUIETLY_REMOTE
;
2738 /* Wait for stop before proceeding. */
2739 a
= XNEW (struct attach_command_continuation_args
);
2740 a
->args
= xstrdup ("");
2741 a
->from_tty
= from_tty
;
2743 add_inferior_continuation (attach_command_continuation
, a
,
2744 attach_command_continuation_free_args
);
2749 attach_post_wait ("" /* args */, from_tty
, mode
);
2754 * takes a program previously attached to and detaches it.
2755 * The program resumes execution and will no longer stop
2756 * on signals, etc. We better not have left any breakpoints
2757 * in the program or it'll die when it hits one. For this
2758 * to work, it may be necessary for the process to have been
2759 * previously attached. It *might* work if the program was
2760 * started via the normal ptrace (PTRACE_TRACEME).
2764 detach_command (const char *args
, int from_tty
)
2766 dont_repeat (); /* Not for the faint of heart. */
2768 if (inferior_ptid
== null_ptid
)
2769 error (_("The program is not being run."));
2771 scoped_disable_commit_resumed
disable_commit_resumed ("detaching");
2773 query_if_trace_running (from_tty
);
2775 disconnect_tracing ();
2777 /* Hold a strong reference to the target while (maybe)
2778 detaching the parent. Otherwise detaching could close the
2781 = target_ops_ref::new_reference (current_inferior ()->process_target ());
2783 /* Save this before detaching, since detaching may unpush the
2784 process_stratum target. */
2785 bool was_non_stop_p
= target_is_non_stop_p ();
2787 target_detach (current_inferior (), from_tty
);
2789 /* The current inferior process was just detached successfully. Get
2790 rid of breakpoints that no longer make sense. Note we don't do
2791 this within target_detach because that is also used when
2792 following child forks, and in that case we will want to transfer
2793 breakpoints to the child, not delete them. */
2794 breakpoint_init_inferior (inf_exited
);
2796 /* If the solist is global across inferiors, don't clear it when we
2797 detach from a single inferior. */
2798 if (!gdbarch_has_global_solist (target_gdbarch ()))
2799 no_shared_libraries (NULL
, from_tty
);
2801 if (deprecated_detach_hook
)
2802 deprecated_detach_hook ();
2804 if (!was_non_stop_p
)
2805 restart_after_all_stop_detach (as_process_stratum_target (target_ref
.get ()));
2807 disable_commit_resumed
.reset_and_commit ();
2810 /* Disconnect from the current target without resuming it (leaving it
2811 waiting for a debugger).
2813 We'd better not have left any breakpoints in the program or the
2814 next debugger will get confused. Currently only supported for some
2815 remote targets, since the normal attach mechanisms don't work on
2816 stopped processes on some native platforms (e.g. GNU/Linux). */
2819 disconnect_command (const char *args
, int from_tty
)
2821 dont_repeat (); /* Not for the faint of heart. */
2822 query_if_trace_running (from_tty
);
2823 disconnect_tracing ();
2824 target_disconnect (args
, from_tty
);
2825 no_shared_libraries (NULL
, from_tty
);
2826 init_thread_list ();
2827 if (deprecated_detach_hook
)
2828 deprecated_detach_hook ();
2831 /* Stop PTID in the current target, and tag the PTID threads as having
2832 been explicitly requested to stop. PTID can be a thread, a
2833 process, or minus_one_ptid, meaning all threads of all inferiors of
2834 the current target. */
2837 stop_current_target_threads_ns (ptid_t ptid
)
2841 /* Tag the thread as having been explicitly requested to stop, so
2842 other parts of gdb know not to resume this thread automatically,
2843 if it was stopped due to an internal event. Limit this to
2844 non-stop mode, as when debugging a multi-threaded application in
2845 all-stop mode, we will only get one stop event --- it's undefined
2846 which thread will report the event. */
2847 set_stop_requested (current_inferior ()->process_target (),
2851 /* See inferior.h. */
2854 interrupt_target_1 (bool all_threads
)
2856 scoped_disable_commit_resumed
disable_commit_resumed ("interrupting");
2862 scoped_restore_current_thread restore_thread
;
2864 for (inferior
*inf
: all_inferiors ())
2866 switch_to_inferior_no_thread (inf
);
2867 stop_current_target_threads_ns (minus_one_ptid
);
2871 stop_current_target_threads_ns (inferior_ptid
);
2874 target_interrupt ();
2876 disable_commit_resumed
.reset_and_commit ();
2880 Stop the execution of the target while running in async mode, in
2881 the background. In all-stop, stop the whole process. In non-stop
2882 mode, stop the current thread only by default, or stop all threads
2883 if the `-a' switch is used. */
2886 interrupt_command (const char *args
, int from_tty
)
2888 if (target_can_async_p ())
2890 int all_threads
= 0;
2892 dont_repeat (); /* Not for the faint of heart. */
2895 && startswith (args
, "-a"))
2898 if (!non_stop
&& all_threads
)
2899 error (_("-a is meaningless in all-stop mode."));
2901 interrupt_target_1 (all_threads
);
2905 /* See inferior.h. */
2908 default_print_float_info (struct gdbarch
*gdbarch
, struct ui_file
*file
,
2909 struct frame_info
*frame
, const char *args
)
2912 int printed_something
= 0;
2914 for (regnum
= 0; regnum
< gdbarch_num_cooked_regs (gdbarch
); regnum
++)
2916 if (gdbarch_register_reggroup_p (gdbarch
, regnum
, float_reggroup
))
2918 printed_something
= 1;
2919 gdbarch_print_registers_info (gdbarch
, file
, frame
, regnum
, 1);
2922 if (!printed_something
)
2923 fprintf_filtered (file
, "No floating-point info "
2924 "available for this processor.\n");
2928 info_float_command (const char *args
, int from_tty
)
2930 struct frame_info
*frame
;
2932 if (!target_has_registers ())
2933 error (_("The program has no registers now."));
2935 frame
= get_selected_frame (NULL
);
2936 gdbarch_print_float_info (get_frame_arch (frame
), gdb_stdout
, frame
, args
);
2939 /* Implement `info proc' family of commands. */
2942 info_proc_cmd_1 (const char *args
, enum info_proc_what what
, int from_tty
)
2944 struct gdbarch
*gdbarch
= get_current_arch ();
2946 if (!target_info_proc (args
, what
))
2948 if (gdbarch_info_proc_p (gdbarch
))
2949 gdbarch_info_proc (gdbarch
, args
, what
);
2951 error (_("Not supported on this target."));
2955 /* Implement `info proc' when given without any further parameters. */
2958 info_proc_cmd (const char *args
, int from_tty
)
2960 info_proc_cmd_1 (args
, IP_MINIMAL
, from_tty
);
2963 /* Implement `info proc mappings'. */
2966 info_proc_cmd_mappings (const char *args
, int from_tty
)
2968 info_proc_cmd_1 (args
, IP_MAPPINGS
, from_tty
);
2971 /* Implement `info proc stat'. */
2974 info_proc_cmd_stat (const char *args
, int from_tty
)
2976 info_proc_cmd_1 (args
, IP_STAT
, from_tty
);
2979 /* Implement `info proc status'. */
2982 info_proc_cmd_status (const char *args
, int from_tty
)
2984 info_proc_cmd_1 (args
, IP_STATUS
, from_tty
);
2987 /* Implement `info proc cwd'. */
2990 info_proc_cmd_cwd (const char *args
, int from_tty
)
2992 info_proc_cmd_1 (args
, IP_CWD
, from_tty
);
2995 /* Implement `info proc cmdline'. */
2998 info_proc_cmd_cmdline (const char *args
, int from_tty
)
3000 info_proc_cmd_1 (args
, IP_CMDLINE
, from_tty
);
3003 /* Implement `info proc exe'. */
3006 info_proc_cmd_exe (const char *args
, int from_tty
)
3008 info_proc_cmd_1 (args
, IP_EXE
, from_tty
);
3011 /* Implement `info proc files'. */
3014 info_proc_cmd_files (const char *args
, int from_tty
)
3016 info_proc_cmd_1 (args
, IP_FILES
, from_tty
);
3019 /* Implement `info proc all'. */
3022 info_proc_cmd_all (const char *args
, int from_tty
)
3024 info_proc_cmd_1 (args
, IP_ALL
, from_tty
);
3027 /* Implement `show print finish'. */
3030 show_print_finish (struct ui_file
*file
, int from_tty
,
3031 struct cmd_list_element
*c
,
3034 fprintf_filtered (file
, _("\
3035 Printing of return value after `finish' is %s.\n"),
3040 /* This help string is used for the run, start, and starti commands.
3041 It is defined as a macro to prevent duplication. */
3043 #define RUN_ARGS_HELP \
3044 "You may specify arguments to give it.\n\
3045 Args may include \"*\", or \"[...]\"; they are expanded using the\n\
3046 shell that will start the program (specified by the \"$SHELL\" environment\n\
3047 variable). Input and output redirection with \">\", \"<\", or \">>\"\n\
3048 are also allowed.\n\
3050 With no arguments, uses arguments last specified (with \"run\" or \n\
3051 \"set args\"). To cancel previous arguments and run with no arguments,\n\
3052 use \"set args\" without arguments.\n\
3054 To start the inferior without using a shell, use \"set startup-with-shell off\"."
3056 void _initialize_infcmd ();
3058 _initialize_infcmd ()
3060 static struct cmd_list_element
*info_proc_cmdlist
;
3061 struct cmd_list_element
*c
= NULL
;
3062 const char *cmd_name
;
3064 /* Add the filename of the terminal connected to inferior I/O. */
3065 add_setshow_optional_filename_cmd ("inferior-tty", class_run
,
3066 &inferior_io_terminal_scratch
, _("\
3067 Set terminal for future runs of program being debugged."), _("\
3068 Show terminal for future runs of program being debugged."), _("\
3069 Usage: set inferior-tty [TTY]\n\n\
3070 If TTY is omitted, the default behavior of using the same terminal as GDB\n\
3072 set_inferior_tty_command
,
3073 show_inferior_tty_command
,
3074 &setlist
, &showlist
);
3075 cmd_name
= "inferior-tty";
3076 c
= lookup_cmd (&cmd_name
, setlist
, "", NULL
, -1, 1);
3077 gdb_assert (c
!= NULL
);
3078 add_alias_cmd ("tty", c
, class_run
, 0, &cmdlist
);
3081 add_setshow_string_noescape_cmd (cmd_name
, class_run
,
3082 &inferior_args_scratch
, _("\
3083 Set argument list to give program being debugged when it is started."), _("\
3084 Show argument list to give program being debugged when it is started."), _("\
3085 Follow this command with any number of args, to be passed to the program."),
3088 &setlist
, &showlist
);
3089 c
= lookup_cmd (&cmd_name
, setlist
, "", NULL
, -1, 1);
3090 gdb_assert (c
!= NULL
);
3091 set_cmd_completer (c
, filename_completer
);
3094 add_setshow_string_noescape_cmd (cmd_name
, class_run
,
3095 &inferior_cwd_scratch
, _("\
3096 Set the current working directory to be used when the inferior is started.\n\
3097 Changing this setting does not have any effect on inferiors that are\n\
3100 Show the current working directory that is used when the inferior is started."),
3102 Use this command to change the current working directory that will be used\n\
3103 when the inferior is started. This setting does not affect GDB's current\n\
3104 working directory."),
3107 &setlist
, &showlist
);
3108 c
= lookup_cmd (&cmd_name
, setlist
, "", NULL
, -1, 1);
3109 gdb_assert (c
!= NULL
);
3110 set_cmd_completer (c
, filename_completer
);
3112 c
= add_cmd ("environment", no_class
, environment_info
, _("\
3113 The environment to give the program, or one variable's value.\n\
3114 With an argument VAR, prints the value of environment variable VAR to\n\
3115 give the program being debugged. With no arguments, prints the entire\n\
3116 environment to be given to the program."), &showlist
);
3117 set_cmd_completer (c
, noop_completer
);
3119 add_basic_prefix_cmd ("unset", no_class
,
3120 _("Complement to certain \"set\" commands."),
3121 &unsetlist
, "unset ", 0, &cmdlist
);
3123 c
= add_cmd ("environment", class_run
, unset_environment_command
, _("\
3124 Cancel environment variable VAR for the program.\n\
3125 This does not affect the program until the next \"run\" command."),
3127 set_cmd_completer (c
, noop_completer
);
3129 c
= add_cmd ("environment", class_run
, set_environment_command
, _("\
3130 Set environment variable value to give the program.\n\
3131 Arguments are VAR VALUE where VAR is variable name and VALUE is value.\n\
3132 VALUES of environment variables are uninterpreted strings.\n\
3133 This does not affect the program until the next \"run\" command."),
3135 set_cmd_completer (c
, noop_completer
);
3137 c
= add_com ("path", class_files
, path_command
, _("\
3138 Add directory DIR(s) to beginning of search path for object files.\n\
3139 $cwd in the path means the current working directory.\n\
3140 This path is equivalent to the $PATH shell variable. It is a list of\n\
3141 directories, separated by colons. These directories are searched to find\n\
3142 fully linked executable files and separately compiled object files as \
3144 set_cmd_completer (c
, filename_completer
);
3146 c
= add_cmd ("paths", no_class
, path_info
, _("\
3147 Current search path for finding object files.\n\
3148 $cwd in the path means the current working directory.\n\
3149 This path is equivalent to the $PATH shell variable. It is a list of\n\
3150 directories, separated by colons. These directories are searched to find\n\
3151 fully linked executable files and separately compiled object files as \
3154 set_cmd_completer (c
, noop_completer
);
3156 add_prefix_cmd ("kill", class_run
, kill_command
,
3157 _("Kill execution of program being debugged."),
3158 &killlist
, "kill ", 0, &cmdlist
);
3160 add_com ("attach", class_run
, attach_command
, _("\
3161 Attach to a process or file outside of GDB.\n\
3162 This command attaches to another target, of the same type as your last\n\
3163 \"target\" command (\"info files\" will show your target stack).\n\
3164 The command may take as argument a process id or a device file.\n\
3165 For a process id, you must have permission to send the process a signal,\n\
3166 and it must have the same effective uid as the debugger.\n\
3167 When using \"attach\" with a process id, the debugger finds the\n\
3168 program running in the process, looking first in the current working\n\
3169 directory, or (if not found there) using the source file search path\n\
3170 (see the \"directory\" command). You can also use the \"file\" command\n\
3171 to specify the program, and to load its symbol table."));
3173 add_prefix_cmd ("detach", class_run
, detach_command
, _("\
3174 Detach a process or file previously attached.\n\
3175 If a process, it is no longer traced, and it continues its execution. If\n\
3176 you were debugging a file, the file is closed and gdb no longer accesses it."),
3177 &detachlist
, "detach ", 0, &cmdlist
);
3179 add_com ("disconnect", class_run
, disconnect_command
, _("\
3180 Disconnect from a target.\n\
3181 The target will wait for another debugger to connect. Not available for\n\
3184 c
= add_com ("signal", class_run
, signal_command
, _("\
3185 Continue program with the specified signal.\n\
3186 Usage: signal SIGNAL\n\
3187 The SIGNAL argument is processed the same as the handle command.\n\
3189 An argument of \"0\" means continue the program without sending it a signal.\n\
3190 This is useful in cases where the program stopped because of a signal,\n\
3191 and you want to resume the program while discarding the signal.\n\
3193 In a multi-threaded program the signal is delivered to, or discarded from,\n\
3194 the current thread only."));
3195 set_cmd_completer (c
, signal_completer
);
3197 c
= add_com ("queue-signal", class_run
, queue_signal_command
, _("\
3198 Queue a signal to be delivered to the current thread when it is resumed.\n\
3199 Usage: queue-signal SIGNAL\n\
3200 The SIGNAL argument is processed the same as the handle command.\n\
3201 It is an error if the handling state of SIGNAL is \"nopass\".\n\
3203 An argument of \"0\" means remove any currently queued signal from\n\
3204 the current thread. This is useful in cases where the program stopped\n\
3205 because of a signal, and you want to resume it while discarding the signal.\n\
3207 In a multi-threaded program the signal is queued with, or discarded from,\n\
3208 the current thread only."));
3209 set_cmd_completer (c
, signal_completer
);
3211 add_com ("stepi", class_run
, stepi_command
, _("\
3212 Step one instruction exactly.\n\
3214 Argument N means step N times (or till program stops for another \
3216 add_com_alias ("si", "stepi", class_run
, 0);
3218 add_com ("nexti", class_run
, nexti_command
, _("\
3219 Step one instruction, but proceed through subroutine calls.\n\
3221 Argument N means step N times (or till program stops for another \
3223 add_com_alias ("ni", "nexti", class_run
, 0);
3225 add_com ("finish", class_run
, finish_command
, _("\
3226 Execute until selected stack frame returns.\n\
3228 Upon return, the value returned is printed and put in the value history."));
3229 add_com_alias ("fin", "finish", class_run
, 1);
3231 add_com ("next", class_run
, next_command
, _("\
3232 Step program, proceeding through subroutine calls.\n\
3234 Unlike \"step\", if the current source line calls a subroutine,\n\
3235 this command does not enter the subroutine, but instead steps over\n\
3236 the call, in effect treating it as a single source line."));
3237 add_com_alias ("n", "next", class_run
, 1);
3239 add_com ("step", class_run
, step_command
, _("\
3240 Step program until it reaches a different source line.\n\
3242 Argument N means step N times (or till program stops for another \
3244 add_com_alias ("s", "step", class_run
, 1);
3246 c
= add_com ("until", class_run
, until_command
, _("\
3247 Execute until past the current line or past a LOCATION.\n\
3248 Execute until the program reaches a source line greater than the current\n\
3249 or a specified location (same args as break command) within the current \
3251 set_cmd_completer (c
, location_completer
);
3252 add_com_alias ("u", "until", class_run
, 1);
3254 c
= add_com ("advance", class_run
, advance_command
, _("\
3255 Continue the program up to the given location (same form as args for break \
3257 Execution will also stop upon exit from the current stack frame."));
3258 set_cmd_completer (c
, location_completer
);
3260 c
= add_com ("jump", class_run
, jump_command
, _("\
3261 Continue program being debugged at specified line or address.\n\
3262 Usage: jump LOCATION\n\
3263 Give as argument either LINENUM or *ADDR, where ADDR is an expression\n\
3264 for an address to start at."));
3265 set_cmd_completer (c
, location_completer
);
3266 add_com_alias ("j", "jump", class_run
, 1);
3268 add_com ("continue", class_run
, continue_command
, _("\
3269 Continue program being debugged, after signal or breakpoint.\n\
3270 Usage: continue [N]\n\
3271 If proceeding from breakpoint, a number N may be used as an argument,\n\
3272 which means to set the ignore count of that breakpoint to N - 1 (so that\n\
3273 the breakpoint won't break until the Nth time it is reached).\n\
3275 If non-stop mode is enabled, continue only the current thread,\n\
3276 otherwise all the threads in the program are continued. To \n\
3277 continue all stopped threads in non-stop mode, use the -a option.\n\
3278 Specifying -a and an ignore count simultaneously is an error."));
3279 add_com_alias ("c", "cont", class_run
, 1);
3280 add_com_alias ("fg", "cont", class_run
, 1);
3282 c
= add_com ("run", class_run
, run_command
, _("\
3283 Start debugged program.\n"
3285 set_cmd_completer (c
, filename_completer
);
3286 add_com_alias ("r", "run", class_run
, 1);
3288 c
= add_com ("start", class_run
, start_command
, _("\
3289 Start the debugged program stopping at the beginning of the main procedure.\n"
3291 set_cmd_completer (c
, filename_completer
);
3293 c
= add_com ("starti", class_run
, starti_command
, _("\
3294 Start the debugged program stopping at the first instruction.\n"
3296 set_cmd_completer (c
, filename_completer
);
3298 add_com ("interrupt", class_run
, interrupt_command
,
3299 _("Interrupt the execution of the debugged program.\n\
3300 If non-stop mode is enabled, interrupt only the current thread,\n\
3301 otherwise all the threads in the program are stopped. To \n\
3302 interrupt all running threads in non-stop mode, use the -a option."));
3304 c
= add_info ("registers", info_registers_command
, _("\
3305 List of integer registers and their contents, for selected stack frame.\n\
3306 One or more register names as argument means describe the given registers.\n\
3307 One or more register group names as argument means describe the registers\n\
3308 in the named register groups."));
3309 add_info_alias ("r", "registers", 1);
3310 set_cmd_completer (c
, reg_or_group_completer
);
3312 c
= add_info ("all-registers", info_all_registers_command
, _("\
3313 List of all registers and their contents, for selected stack frame.\n\
3314 One or more register names as argument means describe the given registers.\n\
3315 One or more register group names as argument means describe the registers\n\
3316 in the named register groups."));
3317 set_cmd_completer (c
, reg_or_group_completer
);
3319 add_info ("program", info_program_command
,
3320 _("Execution status of the program."));
3322 add_info ("float", info_float_command
,
3323 _("Print the status of the floating point unit."));
3325 add_info ("vector", info_vector_command
,
3326 _("Print the status of the vector unit."));
3328 add_prefix_cmd ("proc", class_info
, info_proc_cmd
,
3330 Show additional information about a process.\n\
3331 Specify any process id, or use the program being debugged by default."),
3332 &info_proc_cmdlist
, "info proc ",
3333 1/*allow-unknown*/, &infolist
);
3335 add_cmd ("mappings", class_info
, info_proc_cmd_mappings
, _("\
3336 List memory regions mapped by the specified process."),
3337 &info_proc_cmdlist
);
3339 add_cmd ("stat", class_info
, info_proc_cmd_stat
, _("\
3340 List process info from /proc/PID/stat."),
3341 &info_proc_cmdlist
);
3343 add_cmd ("status", class_info
, info_proc_cmd_status
, _("\
3344 List process info from /proc/PID/status."),
3345 &info_proc_cmdlist
);
3347 add_cmd ("cwd", class_info
, info_proc_cmd_cwd
, _("\
3348 List current working directory of the specified process."),
3349 &info_proc_cmdlist
);
3351 add_cmd ("cmdline", class_info
, info_proc_cmd_cmdline
, _("\
3352 List command line arguments of the specified process."),
3353 &info_proc_cmdlist
);
3355 add_cmd ("exe", class_info
, info_proc_cmd_exe
, _("\
3356 List absolute filename for executable of the specified process."),
3357 &info_proc_cmdlist
);
3359 add_cmd ("files", class_info
, info_proc_cmd_files
, _("\
3360 List files opened by the specified process."),
3361 &info_proc_cmdlist
);
3363 add_cmd ("all", class_info
, info_proc_cmd_all
, _("\
3364 List all available info about the specified process."),
3365 &info_proc_cmdlist
);
3367 add_setshow_boolean_cmd ("finish", class_support
,
3368 &user_print_options
.finish_print
, _("\
3369 Set whether `finish' prints the return value."), _("\
3370 Show whether `finish' prints the return value."), NULL
,
3373 &setprintlist
, &showprintlist
);