1 /* Memory-access and commands for "inferior" process, for GDB.
3 Copyright (C) 1986-2021 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
21 #include "arch-utils.h"
27 #include "gdbsupport/environ.h"
35 #include "completer.h"
38 #include "reggroups.h"
42 #include "observable.h"
43 #include "target-descriptions.h"
44 #include "user-regs.h"
45 #include "gdbthread.h"
47 #include "inline-frame.h"
48 #include "tracepoint.h"
51 #include "thread-fsm.h"
55 #include "gdbsupport/gdb_optional.h"
57 #include "cli/cli-style.h"
59 /* Local functions: */
61 static void until_next_command (int);
63 static void step_1 (int, int, const char *);
65 #define ERROR_NO_INFERIOR \
66 if (!target_has_execution ()) error (_("The program is not being run."));
68 /* Scratch area where string containing arguments to give to the
69 program will be stored by 'set args'. As soon as anything is
70 stored, notice_args_set will move it into per-inferior storage.
71 Arguments are separated by spaces. Empty string (pointer to '\0')
74 static char *inferior_args_scratch
;
76 /* Scratch area where the new cwd will be stored by 'set cwd'. */
78 static char *inferior_cwd_scratch
;
80 /* Scratch area where 'set inferior-tty' will store user-provided value.
81 We'll immediate copy it into per-inferior storage. */
83 static char *inferior_io_terminal_scratch
;
85 /* Pid of our debugged inferior, or 0 if no inferior now.
86 Since various parts of infrun.c test this to see whether there is a program
87 being debugged it should be nonzero (currently 3 is used) for remote
92 /* Nonzero if stopped due to completion of a stack dummy routine. */
94 enum stop_stack_kind stop_stack_dummy
;
96 /* Nonzero if stopped due to a random (unexpected) signal in inferior
99 int stopped_by_random_signal
;
104 set_inferior_tty_command (const char *args
, int from_tty
,
105 struct cmd_list_element
*c
)
107 /* CLI has assigned the user-provided value to inferior_io_terminal_scratch.
108 Now route it to current inferior. */
109 current_inferior ()->set_tty (inferior_io_terminal_scratch
);
113 show_inferior_tty_command (struct ui_file
*file
, int from_tty
,
114 struct cmd_list_element
*c
, const char *value
)
116 /* Note that we ignore the passed-in value in favor of computing it
118 const char *inferior_tty
= current_inferior ()->tty ();
120 if (inferior_tty
== nullptr)
122 fprintf_filtered (gdb_stdout
,
123 _("Terminal for future runs of program being debugged "
124 "is \"%s\".\n"), inferior_tty
);
128 get_inferior_args (void)
130 if (current_inferior ()->argc
!= 0)
132 gdb::array_view
<char * const> args (current_inferior ()->argv
,
133 current_inferior ()->argc
);
134 std::string n
= construct_inferior_arguments (args
);
135 set_inferior_args (n
.c_str ());
138 if (current_inferior ()->args
== NULL
)
139 current_inferior ()->args
= make_unique_xstrdup ("");
141 return current_inferior ()->args
.get ();
144 /* Set the arguments for the current inferior. Ownership of
145 NEWARGS is not transferred. */
148 set_inferior_args (const char *newargs
)
150 if (newargs
!= nullptr)
151 current_inferior ()->args
= make_unique_xstrdup (newargs
);
153 current_inferior ()->args
.reset ();
155 current_inferior ()->argc
= 0;
156 current_inferior ()->argv
= 0;
160 set_inferior_args_vector (int argc
, char **argv
)
162 current_inferior ()->argc
= argc
;
163 current_inferior ()->argv
= argv
;
166 /* Notice when `set args' is run. */
169 set_args_command (const char *args
, int from_tty
, struct cmd_list_element
*c
)
171 /* CLI has assigned the user-provided value to inferior_args_scratch.
172 Now route it to current inferior. */
173 set_inferior_args (inferior_args_scratch
);
176 /* Notice when `show args' is run. */
179 show_args_command (struct ui_file
*file
, int from_tty
,
180 struct cmd_list_element
*c
, const char *value
)
182 /* Note that we ignore the passed-in value in favor of computing it
184 deprecated_show_value_hack (file
, from_tty
, c
, get_inferior_args ());
187 /* See gdbsupport/common-inferior.h. */
190 set_inferior_cwd (const char *cwd
)
192 struct inferior
*inf
= current_inferior ();
194 gdb_assert (inf
!= NULL
);
199 inf
->cwd
.reset (xstrdup (cwd
));
202 /* See gdbsupport/common-inferior.h. */
207 return current_inferior ()->cwd
.get ();
210 /* Handle the 'set cwd' command. */
213 set_cwd_command (const char *args
, int from_tty
, struct cmd_list_element
*c
)
215 if (*inferior_cwd_scratch
== '\0')
216 set_inferior_cwd (NULL
);
218 set_inferior_cwd (inferior_cwd_scratch
);
221 /* Handle the 'show cwd' command. */
224 show_cwd_command (struct ui_file
*file
, int from_tty
,
225 struct cmd_list_element
*c
, const char *value
)
227 const char *cwd
= get_inferior_cwd ();
230 fprintf_filtered (gdb_stdout
,
232 You have not set the inferior's current working directory.\n\
233 The inferior will inherit GDB's cwd if native debugging, or the remote\n\
234 server's cwd if remote debugging.\n"));
236 fprintf_filtered (gdb_stdout
,
237 _("Current working directory that will be used "
238 "when starting the inferior is \"%s\".\n"), cwd
);
242 /* This function strips the '&' character (indicating background
243 execution) that is added as *the last* of the arguments ARGS of a
244 command. A copy of the incoming ARGS without the '&' is returned,
245 unless the resulting string after stripping is empty, in which case
246 NULL is returned. *BG_CHAR_P is an output boolean that indicates
247 whether the '&' character was found. */
249 static gdb::unique_xmalloc_ptr
<char>
250 strip_bg_char (const char *args
, int *bg_char_p
)
254 if (args
== NULL
|| *args
== '\0')
260 p
= args
+ strlen (args
);
264 while (p
> args
&& isspace (p
[-1]))
269 return gdb::unique_xmalloc_ptr
<char>
270 (savestring (args
, p
- args
));
272 return gdb::unique_xmalloc_ptr
<char> (nullptr);
276 return make_unique_xstrdup (args
);
279 /* Common actions to take after creating any sort of inferior, by any
280 means (running, attaching, connecting, et cetera). The target
281 should be stopped. */
284 post_create_inferior (int from_tty
)
287 /* Be sure we own the terminal in case write operations are performed. */
288 target_terminal::ours_for_output ();
290 /* If the target hasn't taken care of this already, do it now.
291 Targets which need to access registers during to_open,
292 to_create_inferior, or to_attach should do it earlier; but many
294 target_find_description ();
296 /* Now that we know the register layout, retrieve current PC. But
297 if the PC is unavailable (e.g., we're opening a core file with
298 missing registers info), ignore it. */
299 thread_info
*thr
= inferior_thread ();
301 thr
->suspend
.stop_pc
= 0;
304 regcache
*rc
= get_thread_regcache (thr
);
305 thr
->suspend
.stop_pc
= regcache_read_pc (rc
);
307 catch (const gdb_exception_error
&ex
)
309 if (ex
.error
!= NOT_AVAILABLE_ERROR
)
313 if (current_program_space
->exec_bfd ())
315 const unsigned solib_add_generation
316 = current_program_space
->solib_add_generation
;
318 /* Create the hooks to handle shared library load and unload
320 solib_create_inferior_hook (from_tty
);
322 if (current_program_space
->solib_add_generation
== solib_add_generation
)
324 /* The platform-specific hook should load initial shared libraries,
325 but didn't. FROM_TTY will be incorrectly 0 but such solib
326 targets should be fixed anyway. Call it only after the solib
327 target has been initialized by solib_create_inferior_hook. */
330 warning (_("platform-specific solib_create_inferior_hook did "
331 "not load initial shared libraries."));
333 /* If the solist is global across processes, there's no need to
335 if (!gdbarch_has_global_solist (target_gdbarch ()))
336 solib_add (NULL
, 0, auto_solib_add
);
340 /* If the user sets watchpoints before execution having started,
341 then she gets software watchpoints, because GDB can't know which
342 target will end up being pushed, or if it supports hardware
343 watchpoints or not. breakpoint_re_set takes care of promoting
344 watchpoints to hardware watchpoints if possible, however, if this
345 new inferior doesn't load shared libraries or we don't pull in
346 symbols from any other source on this target/arch,
347 breakpoint_re_set is never called. Call it now so that software
348 watchpoints get a chance to be promoted to hardware watchpoints
349 if the now pushed target supports hardware watchpoints. */
350 breakpoint_re_set ();
352 gdb::observers::inferior_created
.notify (current_inferior ());
355 /* Kill the inferior if already running. This function is designed
356 to be called when we are about to start the execution of the program
357 from the beginning. Ask the user to confirm that he wants to restart
358 the program being debugged when FROM_TTY is non-null. */
361 kill_if_already_running (int from_tty
)
363 if (inferior_ptid
!= null_ptid
&& target_has_execution ())
365 /* Bail out before killing the program if we will not be able to
367 target_require_runnable ();
370 && !query (_("The program being debugged has been started already.\n\
371 Start it from the beginning? ")))
372 error (_("Program not restarted."));
377 /* See inferior.h. */
380 prepare_execution_command (struct target_ops
*target
, int background
)
382 /* If we get a request for running in the bg but the target
383 doesn't support it, error out. */
384 if (background
&& !target
->can_async_p ())
385 error (_("Asynchronous execution not supported on this target."));
389 /* If we get a request for running in the fg, then we need to
390 simulate synchronous (fg) execution. Note no cleanup is
391 necessary for this. stdin is re-enabled whenever an error
392 reaches the top level. */
393 all_uis_on_sync_execution_starting ();
397 /* Determine how the new inferior will behave. */
401 /* Run program without any explicit stop during startup. */
404 /* Stop at the beginning of the program's main function. */
407 /* Stop at the first instruction of the program. */
408 RUN_STOP_AT_FIRST_INSN
411 /* Implement the "run" command. Force a stop during program start if
412 requested by RUN_HOW. */
415 run_command_1 (const char *args
, int from_tty
, enum run_how run_how
)
417 const char *exec_file
;
418 struct ui_out
*uiout
= current_uiout
;
419 struct target_ops
*run_target
;
424 scoped_disable_commit_resumed
disable_commit_resumed ("running");
426 kill_if_already_running (from_tty
);
428 init_wait_for_inferior ();
429 clear_breakpoint_hit_counts ();
431 /* Clean up any leftovers from other runs. Some other things from
432 this function should probably be moved into target_pre_inferior. */
433 target_pre_inferior (from_tty
);
435 /* The comment here used to read, "The exec file is re-read every
436 time we do a generic_mourn_inferior, so we just have to worry
437 about the symbol file." The `generic_mourn_inferior' function
438 gets called whenever the program exits. However, suppose the
439 program exits, and *then* the executable file changes? We need
440 to check again here. Since reopen_exec_file doesn't do anything
441 if the timestamp hasn't changed, I don't see the harm. */
445 gdb::unique_xmalloc_ptr
<char> stripped
= strip_bg_char (args
, &async_exec
);
446 args
= stripped
.get ();
448 /* Do validation and preparation before possibly changing anything
451 run_target
= find_run_target ();
453 prepare_execution_command (run_target
, async_exec
);
455 if (non_stop
&& !run_target
->supports_non_stop ())
456 error (_("The target does not support running in non-stop mode."));
458 /* Done. Can now set breakpoints, change inferior args, etc. */
460 /* Insert temporary breakpoint in main function if requested. */
461 if (run_how
== RUN_STOP_AT_MAIN
)
463 std::string arg
= string_printf ("-qualified %s", main_name ());
464 tbreak_command (arg
.c_str (), 0);
467 exec_file
= get_exec_file (0);
469 /* We keep symbols from add-symbol-file, on the grounds that the
470 user might want to add some symbols before running the program
471 (right?). But sometimes (dynamic loading where the user manually
472 introduces the new symbols with add-symbol-file), the code which
473 the symbols describe does not persist between runs. Currently
474 the user has to manually nuke all symbols between runs if they
475 want them to go away (PR 2207). This is probably reasonable. */
477 /* If there were other args, beside '&', process them. */
479 set_inferior_args (args
);
483 uiout
->field_string (NULL
, "Starting program");
486 uiout
->field_string ("execfile", exec_file
);
488 /* We call get_inferior_args() because we might need to compute
490 uiout
->field_string ("infargs", get_inferior_args ());
495 /* We call get_inferior_args() because we might need to compute
497 run_target
->create_inferior (exec_file
,
498 std::string (get_inferior_args ()),
499 current_inferior ()->environment
.envp (),
501 /* to_create_inferior should push the target, so after this point we
502 shouldn't refer to run_target again. */
505 /* We're starting off a new process. When we get out of here, in
506 non-stop mode, finish the state of all threads of that process,
507 but leave other threads alone, as they may be stopped in internal
508 events --- the frontend shouldn't see them as stopped. In
509 all-stop, always finish the state of all threads, as we may be
510 resuming more than just the new process. */
511 process_stratum_target
*finish_target
;
515 finish_target
= current_inferior ()->process_target ();
516 finish_ptid
= ptid_t (current_inferior ()->pid
);
520 finish_target
= nullptr;
521 finish_ptid
= minus_one_ptid
;
523 scoped_finish_thread_state
finish_state (finish_target
, finish_ptid
);
525 /* Pass zero for FROM_TTY, because at this point the "run" command
526 has done its thing; now we are setting up the running program. */
527 post_create_inferior (0);
529 /* Queue a pending event so that the program stops immediately. */
530 if (run_how
== RUN_STOP_AT_FIRST_INSN
)
532 thread_info
*thr
= inferior_thread ();
533 thr
->suspend
.waitstatus_pending_p
= 1;
534 thr
->suspend
.waitstatus
.kind
= TARGET_WAITKIND_STOPPED
;
535 thr
->suspend
.waitstatus
.value
.sig
= GDB_SIGNAL_0
;
538 /* Start the target running. Do not use -1 continuation as it would skip
539 breakpoint right at the entry point. */
540 proceed (regcache_read_pc (get_current_regcache ()), GDB_SIGNAL_0
);
542 /* Since there was no error, there's no need to finish the thread
544 finish_state
.release ();
546 disable_commit_resumed
.reset_and_commit ();
550 run_command (const char *args
, int from_tty
)
552 run_command_1 (args
, from_tty
, RUN_NORMAL
);
555 /* Start the execution of the program up until the beginning of the main
559 start_command (const char *args
, int from_tty
)
561 /* Some languages such as Ada need to search inside the program
562 minimal symbols for the location where to put the temporary
563 breakpoint before starting. */
564 if (!have_minimal_symbols ())
565 error (_("No symbol table loaded. Use the \"file\" command."));
567 /* Run the program until reaching the main procedure... */
568 run_command_1 (args
, from_tty
, RUN_STOP_AT_MAIN
);
571 /* Start the execution of the program stopping at the first
575 starti_command (const char *args
, int from_tty
)
577 run_command_1 (args
, from_tty
, RUN_STOP_AT_FIRST_INSN
);
581 proceed_thread_callback (struct thread_info
*thread
, void *arg
)
583 /* We go through all threads individually instead of compressing
584 into a single target `resume_all' request, because some threads
585 may be stopped in internal breakpoints/events, or stopped waiting
586 for its turn in the displaced stepping queue (that is, they are
587 running && !executing). The target side has no idea about why
588 the thread is stopped, so a `resume_all' command would resume too
589 much. If/when GDB gains a way to tell the target `hold this
590 thread stopped until I say otherwise', then we can optimize
592 if (thread
->state
!= THREAD_STOPPED
)
595 if (!thread
->inf
->has_execution ())
598 switch_to_thread (thread
);
599 clear_proceed_status (0);
600 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
605 ensure_valid_thread (void)
607 if (inferior_ptid
== null_ptid
608 || inferior_thread ()->state
== THREAD_EXITED
)
609 error (_("Cannot execute this command without a live selected thread."));
612 /* If the user is looking at trace frames, any resumption of execution
613 is likely to mix up recorded and live target data. So simply
614 disallow those commands. */
617 ensure_not_tfind_mode (void)
619 if (get_traceframe_number () >= 0)
620 error (_("Cannot execute this command while looking at trace frames."));
623 /* Throw an error indicating the current thread is running. */
626 error_is_running (void)
628 error (_("Cannot execute this command while "
629 "the selected thread is running."));
632 /* Calls error_is_running if the current thread is running. */
635 ensure_not_running (void)
637 if (inferior_thread ()->state
== THREAD_RUNNING
)
642 continue_1 (int all_threads
)
645 ensure_not_tfind_mode ();
647 if (non_stop
&& all_threads
)
649 /* Don't error out if the current thread is running, because
650 there may be other stopped threads. */
652 /* Backup current thread and selected frame and restore on scope
654 scoped_restore_current_thread restore_thread
;
656 iterate_over_threads (proceed_thread_callback
, NULL
);
658 if (current_ui
->prompt_state
== PROMPT_BLOCKED
)
660 /* If all threads in the target were already running,
661 proceed_thread_callback ends up never calling proceed,
662 and so nothing calls this to put the inferior's terminal
663 settings in effect and remove stdin from the event loop,
664 which we must when running a foreground command. E.g.:
668 <all threads are running now>
671 <no thread was resumed, but the inferior now owns the terminal>
673 target_terminal::inferior ();
678 ensure_valid_thread ();
679 ensure_not_running ();
680 clear_proceed_status (0);
681 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
685 /* continue [-a] [proceed-count] [&] */
688 continue_command (const char *args
, int from_tty
)
691 bool all_threads_p
= false;
695 /* Find out whether we must run in the background. */
696 gdb::unique_xmalloc_ptr
<char> stripped
= strip_bg_char (args
, &async_exec
);
697 args
= stripped
.get ();
701 if (startswith (args
, "-a"))
703 all_threads_p
= true;
704 args
+= sizeof ("-a") - 1;
710 if (!non_stop
&& all_threads_p
)
711 error (_("`-a' is meaningless in all-stop mode."));
713 if (args
!= NULL
&& all_threads_p
)
714 error (_("Can't resume all threads and specify "
715 "proceed count simultaneously."));
717 /* If we have an argument left, set proceed count of breakpoint we
724 struct thread_info
*tp
;
727 tp
= inferior_thread ();
730 process_stratum_target
*last_target
;
733 get_last_target_status (&last_target
, &last_ptid
, nullptr);
734 tp
= find_thread_ptid (last_target
, last_ptid
);
737 bs
= tp
->control
.stop_bpstat
;
739 while ((stat
= bpstat_num (&bs
, &num
)) != 0)
742 set_ignore_count (num
,
743 parse_and_eval_long (args
) - 1,
745 /* set_ignore_count prints a message ending with a period.
746 So print two spaces before "Continuing.". */
748 printf_filtered (" ");
752 if (!stopped
&& from_tty
)
755 ("Not stopped at any breakpoint; argument ignored.\n");
760 ensure_not_tfind_mode ();
762 if (!non_stop
|| !all_threads_p
)
764 ensure_valid_thread ();
765 ensure_not_running ();
768 prepare_execution_command (current_inferior ()->top_target (), async_exec
);
771 printf_filtered (_("Continuing.\n"));
773 continue_1 (all_threads_p
);
776 /* Record in TP the starting point of a "step" or "next" command. */
779 set_step_frame (thread_info
*tp
)
781 /* This can be removed once this function no longer implicitly relies on the
782 inferior_ptid value. */
783 gdb_assert (inferior_ptid
== tp
->ptid
);
785 frame_info
*frame
= get_current_frame ();
787 symtab_and_line sal
= find_frame_sal (frame
);
788 set_step_info (tp
, frame
, sal
);
790 CORE_ADDR pc
= get_frame_pc (frame
);
791 tp
->control
.step_start_function
= find_pc_function (pc
);
794 /* Step until outside of current statement. */
797 step_command (const char *count_string
, int from_tty
)
799 step_1 (0, 0, count_string
);
802 /* Likewise, but skip over subroutine calls as if single instructions. */
805 next_command (const char *count_string
, int from_tty
)
807 step_1 (1, 0, count_string
);
810 /* Likewise, but step only one instruction. */
813 stepi_command (const char *count_string
, int from_tty
)
815 step_1 (0, 1, count_string
);
819 nexti_command (const char *count_string
, int from_tty
)
821 step_1 (1, 1, count_string
);
824 /* Data for the FSM that manages the step/next/stepi/nexti
827 struct step_command_fsm
: public thread_fsm
829 /* How many steps left in a "step N"-like command. */
832 /* If true, this is a next/nexti, otherwise a step/stepi. */
833 int skip_subroutines
;
835 /* If true, this is a stepi/nexti, otherwise a step/step. */
838 explicit step_command_fsm (struct interp
*cmd_interp
)
839 : thread_fsm (cmd_interp
)
843 void clean_up (struct thread_info
*thread
) override
;
844 bool should_stop (struct thread_info
*thread
) override
;
845 enum async_reply_reason
do_async_reply_reason () override
;
848 /* Prepare for a step/next/etc. command. Any target resource
849 allocated here is undone in the FSM's clean_up method. */
852 step_command_fsm_prepare (struct step_command_fsm
*sm
,
853 int skip_subroutines
, int single_inst
,
854 int count
, struct thread_info
*thread
)
856 sm
->skip_subroutines
= skip_subroutines
;
857 sm
->single_inst
= single_inst
;
860 /* Leave the si command alone. */
861 if (!sm
->single_inst
|| sm
->skip_subroutines
)
862 set_longjmp_breakpoint (thread
, get_frame_id (get_current_frame ()));
864 thread
->control
.stepping_command
= 1;
867 static int prepare_one_step (thread_info
*, struct step_command_fsm
*sm
);
870 step_1 (int skip_subroutines
, int single_inst
, const char *count_string
)
874 struct thread_info
*thr
;
875 struct step_command_fsm
*step_sm
;
878 ensure_not_tfind_mode ();
879 ensure_valid_thread ();
880 ensure_not_running ();
882 gdb::unique_xmalloc_ptr
<char> stripped
883 = strip_bg_char (count_string
, &async_exec
);
884 count_string
= stripped
.get ();
886 prepare_execution_command (current_inferior ()->top_target (), async_exec
);
888 count
= count_string
? parse_and_eval_long (count_string
) : 1;
890 clear_proceed_status (1);
892 /* Setup the execution command state machine to handle all the COUNT
894 thr
= inferior_thread ();
895 step_sm
= new step_command_fsm (command_interp ());
896 thr
->thread_fsm
= step_sm
;
898 step_command_fsm_prepare (step_sm
, skip_subroutines
,
899 single_inst
, count
, thr
);
901 /* Do only one step for now, before returning control to the event
902 loop. Let the continuation figure out how many other steps we
903 need to do, and handle them one at the time, through
905 if (!prepare_one_step (thr
, step_sm
))
906 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
911 /* Stepped into an inline frame. Pretend that we've
913 thr
->thread_fsm
->clean_up (thr
);
914 proceeded
= normal_stop ();
916 inferior_event_handler (INF_EXEC_COMPLETE
);
917 all_uis_check_sync_execution_done ();
921 /* Implementation of the 'should_stop' FSM method for stepping
922 commands. Called after we are done with one step operation, to
923 check whether we need to step again, before we print the prompt and
924 return control to the user. If count is > 1, returns false, as we
925 will need to keep going. */
928 step_command_fsm::should_stop (struct thread_info
*tp
)
930 if (tp
->control
.stop_step
)
932 /* There are more steps to make, and we did stop due to
933 ending a stepping range. Do another step. */
935 return prepare_one_step (tp
, this);
943 /* Implementation of the 'clean_up' FSM method for stepping commands. */
946 step_command_fsm::clean_up (struct thread_info
*thread
)
948 if (!single_inst
|| skip_subroutines
)
949 delete_longjmp_breakpoint (thread
->global_num
);
952 /* Implementation of the 'async_reply_reason' FSM method for stepping
955 enum async_reply_reason
956 step_command_fsm::do_async_reply_reason ()
958 return EXEC_ASYNC_END_STEPPING_RANGE
;
961 /* Prepare for one step in "step N". The actual target resumption is
962 done by the caller. Return true if we're done and should thus
963 report a stop to the user. Returns false if the target needs to be
967 prepare_one_step (thread_info
*tp
, struct step_command_fsm
*sm
)
969 /* This can be removed once this function no longer implicitly relies on the
970 inferior_ptid value. */
971 gdb_assert (inferior_ptid
== tp
->ptid
);
975 struct frame_info
*frame
= get_current_frame ();
979 if (!sm
->single_inst
)
983 /* Step at an inlined function behaves like "down". */
984 if (!sm
->skip_subroutines
985 && inline_skipped_frames (tp
))
988 const char *fn
= NULL
;
992 /* Pretend that we've ran. */
993 resume_ptid
= user_visible_resume_ptid (1);
994 set_running (tp
->inf
->process_target (), resume_ptid
, true);
996 step_into_inline_frame (tp
);
998 frame
= get_current_frame ();
999 sal
= find_frame_sal (frame
);
1000 sym
= get_frame_function (frame
);
1003 fn
= sym
->print_name ();
1006 || !function_name_is_marked_for_skip (fn
, sal
))
1009 return prepare_one_step (tp
, sm
);
1013 pc
= get_frame_pc (frame
);
1014 find_pc_line_pc_range (pc
,
1015 &tp
->control
.step_range_start
,
1016 &tp
->control
.step_range_end
);
1018 /* There's a problem in gcc (PR gcc/98780) that causes missing line
1019 table entries, which results in a too large stepping range.
1020 Use inlined_subroutine info to make the range more narrow. */
1021 if (inline_skipped_frames (tp
) > 0)
1023 symbol
*sym
= inline_skipped_symbol (tp
);
1024 if (SYMBOL_CLASS (sym
) == LOC_BLOCK
)
1026 const block
*block
= SYMBOL_BLOCK_VALUE (sym
);
1027 if (BLOCK_END (block
) < tp
->control
.step_range_end
)
1028 tp
->control
.step_range_end
= BLOCK_END (block
);
1032 tp
->control
.may_range_step
= 1;
1034 /* If we have no line info, switch to stepi mode. */
1035 if (tp
->control
.step_range_end
== 0 && step_stop_if_no_debug
)
1037 tp
->control
.step_range_start
= tp
->control
.step_range_end
= 1;
1038 tp
->control
.may_range_step
= 0;
1040 else if (tp
->control
.step_range_end
== 0)
1044 if (find_pc_partial_function (pc
, &name
,
1045 &tp
->control
.step_range_start
,
1046 &tp
->control
.step_range_end
) == 0)
1047 error (_("Cannot find bounds of current function"));
1049 target_terminal::ours_for_output ();
1050 printf_filtered (_("Single stepping until exit from function %s,"
1051 "\nwhich has no line number information.\n"),
1057 /* Say we are stepping, but stop after one insn whatever it does. */
1058 tp
->control
.step_range_start
= tp
->control
.step_range_end
= 1;
1059 if (!sm
->skip_subroutines
)
1061 Don't step over function calls, not even to functions lacking
1063 tp
->control
.step_over_calls
= STEP_OVER_NONE
;
1066 if (sm
->skip_subroutines
)
1067 tp
->control
.step_over_calls
= STEP_OVER_ALL
;
1073 sm
->set_finished ();
1078 /* Continue program at specified address. */
1081 jump_command (const char *arg
, int from_tty
)
1083 struct gdbarch
*gdbarch
= get_current_arch ();
1090 ensure_not_tfind_mode ();
1091 ensure_valid_thread ();
1092 ensure_not_running ();
1094 /* Find out whether we must run in the background. */
1095 gdb::unique_xmalloc_ptr
<char> stripped
= strip_bg_char (arg
, &async_exec
);
1096 arg
= stripped
.get ();
1098 prepare_execution_command (current_inferior ()->top_target (), async_exec
);
1101 error_no_arg (_("starting address"));
1103 std::vector
<symtab_and_line
> sals
1104 = decode_line_with_last_displayed (arg
, DECODE_LINE_FUNFIRSTLINE
);
1105 if (sals
.size () != 1)
1106 error (_("Unreasonable jump request"));
1108 symtab_and_line
&sal
= sals
[0];
1110 if (sal
.symtab
== 0 && sal
.pc
== 0)
1111 error (_("No source file has been specified."));
1113 resolve_sal_pc (&sal
); /* May error out. */
1115 /* See if we are trying to jump to another function. */
1116 fn
= get_frame_function (get_current_frame ());
1117 sfn
= find_pc_function (sal
.pc
);
1118 if (fn
!= NULL
&& sfn
!= fn
)
1120 if (!query (_("Line %d is not in `%s'. Jump anyway? "), sal
.line
,
1123 error (_("Not confirmed."));
1130 struct obj_section
*section
;
1132 fixup_symbol_section (sfn
, 0);
1133 section
= sfn
->obj_section (symbol_objfile (sfn
));
1134 if (section_is_overlay (section
)
1135 && !section_is_mapped (section
))
1137 if (!query (_("WARNING!!! Destination is in "
1138 "unmapped overlay! Jump anyway? ")))
1140 error (_("Not confirmed."));
1150 printf_filtered (_("Continuing at "));
1151 fputs_filtered (paddress (gdbarch
, addr
), gdb_stdout
);
1152 printf_filtered (".\n");
1155 clear_proceed_status (0);
1156 proceed (addr
, GDB_SIGNAL_0
);
1159 /* Continue program giving it specified signal. */
1162 signal_command (const char *signum_exp
, int from_tty
)
1164 enum gdb_signal oursig
;
1167 dont_repeat (); /* Too dangerous. */
1169 ensure_not_tfind_mode ();
1170 ensure_valid_thread ();
1171 ensure_not_running ();
1173 /* Find out whether we must run in the background. */
1174 gdb::unique_xmalloc_ptr
<char> stripped
1175 = strip_bg_char (signum_exp
, &async_exec
);
1176 signum_exp
= stripped
.get ();
1178 prepare_execution_command (current_inferior ()->top_target (), async_exec
);
1181 error_no_arg (_("signal number"));
1183 /* It would be even slicker to make signal names be valid expressions,
1184 (the type could be "enum $signal" or some such), then the user could
1185 assign them to convenience variables. */
1186 oursig
= gdb_signal_from_name (signum_exp
);
1188 if (oursig
== GDB_SIGNAL_UNKNOWN
)
1190 /* No, try numeric. */
1191 int num
= parse_and_eval_long (signum_exp
);
1194 oursig
= GDB_SIGNAL_0
;
1196 oursig
= gdb_signal_from_command (num
);
1199 /* Look for threads other than the current that this command ends up
1200 resuming too (due to schedlock off), and warn if they'll get a
1201 signal delivered. "signal 0" is used to suppress a previous
1202 signal, but if the current thread is no longer the one that got
1203 the signal, then the user is potentially suppressing the signal
1204 of the wrong thread. */
1207 int must_confirm
= 0;
1209 /* This indicates what will be resumed. Either a single thread,
1210 a whole process, or all threads of all processes. */
1211 ptid_t resume_ptid
= user_visible_resume_ptid (0);
1212 process_stratum_target
*resume_target
1213 = user_visible_resume_target (resume_ptid
);
1215 thread_info
*current
= inferior_thread ();
1217 for (thread_info
*tp
: all_non_exited_threads (resume_target
, resume_ptid
))
1222 if (tp
->suspend
.stop_signal
!= GDB_SIGNAL_0
1223 && signal_pass_state (tp
->suspend
.stop_signal
))
1226 printf_unfiltered (_("Note:\n"));
1227 printf_unfiltered (_(" Thread %s previously stopped with signal %s, %s.\n"),
1228 print_thread_id (tp
),
1229 gdb_signal_to_name (tp
->suspend
.stop_signal
),
1230 gdb_signal_to_string (tp
->suspend
.stop_signal
));
1236 && !query (_("Continuing thread %s (the current thread) with specified signal will\n"
1237 "still deliver the signals noted above to their respective threads.\n"
1238 "Continue anyway? "),
1239 print_thread_id (inferior_thread ())))
1240 error (_("Not confirmed."));
1245 if (oursig
== GDB_SIGNAL_0
)
1246 printf_filtered (_("Continuing with no signal.\n"));
1248 printf_filtered (_("Continuing with signal %s.\n"),
1249 gdb_signal_to_name (oursig
));
1252 clear_proceed_status (0);
1253 proceed ((CORE_ADDR
) -1, oursig
);
1256 /* Queue a signal to be delivered to the current thread. */
1259 queue_signal_command (const char *signum_exp
, int from_tty
)
1261 enum gdb_signal oursig
;
1262 struct thread_info
*tp
;
1265 ensure_not_tfind_mode ();
1266 ensure_valid_thread ();
1267 ensure_not_running ();
1269 if (signum_exp
== NULL
)
1270 error_no_arg (_("signal number"));
1272 /* It would be even slicker to make signal names be valid expressions,
1273 (the type could be "enum $signal" or some such), then the user could
1274 assign them to convenience variables. */
1275 oursig
= gdb_signal_from_name (signum_exp
);
1277 if (oursig
== GDB_SIGNAL_UNKNOWN
)
1279 /* No, try numeric. */
1280 int num
= parse_and_eval_long (signum_exp
);
1283 oursig
= GDB_SIGNAL_0
;
1285 oursig
= gdb_signal_from_command (num
);
1288 if (oursig
!= GDB_SIGNAL_0
1289 && !signal_pass_state (oursig
))
1290 error (_("Signal handling set to not pass this signal to the program."));
1292 tp
= inferior_thread ();
1293 tp
->suspend
.stop_signal
= oursig
;
1296 /* Data for the FSM that manages the until (with no argument)
1299 struct until_next_fsm
: public thread_fsm
1301 /* The thread that as current when the command was executed. */
1304 until_next_fsm (struct interp
*cmd_interp
, int thread
)
1305 : thread_fsm (cmd_interp
),
1310 bool should_stop (struct thread_info
*thread
) override
;
1311 void clean_up (struct thread_info
*thread
) override
;
1312 enum async_reply_reason
do_async_reply_reason () override
;
1315 /* Implementation of the 'should_stop' FSM method for the until (with
1319 until_next_fsm::should_stop (struct thread_info
*tp
)
1321 if (tp
->control
.stop_step
)
1327 /* Implementation of the 'clean_up' FSM method for the until (with no
1331 until_next_fsm::clean_up (struct thread_info
*thread
)
1333 delete_longjmp_breakpoint (thread
->global_num
);
1336 /* Implementation of the 'async_reply_reason' FSM method for the until
1337 (with no arg) command. */
1339 enum async_reply_reason
1340 until_next_fsm::do_async_reply_reason ()
1342 return EXEC_ASYNC_END_STEPPING_RANGE
;
1345 /* Proceed until we reach a different source line with pc greater than
1346 our current one or exit the function. We skip calls in both cases.
1348 Note that eventually this command should probably be changed so
1349 that only source lines are printed out when we hit the breakpoint
1350 we set. This may involve changes to wait_for_inferior and the
1351 proceed status code. */
1354 until_next_command (int from_tty
)
1356 struct frame_info
*frame
;
1358 struct symbol
*func
;
1359 struct symtab_and_line sal
;
1360 struct thread_info
*tp
= inferior_thread ();
1361 int thread
= tp
->global_num
;
1362 struct until_next_fsm
*sm
;
1364 clear_proceed_status (0);
1365 set_step_frame (tp
);
1367 frame
= get_current_frame ();
1369 /* Step until either exited from this function or greater
1370 than the current line (if in symbolic section) or pc (if
1373 pc
= get_frame_pc (frame
);
1374 func
= find_pc_function (pc
);
1378 struct bound_minimal_symbol msymbol
= lookup_minimal_symbol_by_pc (pc
);
1380 if (msymbol
.minsym
== NULL
)
1381 error (_("Execution is not within a known function."));
1383 tp
->control
.step_range_start
= BMSYMBOL_VALUE_ADDRESS (msymbol
);
1384 /* The upper-bound of step_range is exclusive. In order to make PC
1385 within the range, set the step_range_end with PC + 1. */
1386 tp
->control
.step_range_end
= pc
+ 1;
1390 sal
= find_pc_line (pc
, 0);
1392 tp
->control
.step_range_start
= BLOCK_ENTRY_PC (SYMBOL_BLOCK_VALUE (func
));
1393 tp
->control
.step_range_end
= sal
.end
;
1395 tp
->control
.may_range_step
= 1;
1397 tp
->control
.step_over_calls
= STEP_OVER_ALL
;
1399 set_longjmp_breakpoint (tp
, get_frame_id (frame
));
1400 delete_longjmp_breakpoint_cleanup
lj_deleter (thread
);
1402 sm
= new until_next_fsm (command_interp (), tp
->global_num
);
1403 tp
->thread_fsm
= sm
;
1404 lj_deleter
.release ();
1406 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
1410 until_command (const char *arg
, int from_tty
)
1415 ensure_not_tfind_mode ();
1416 ensure_valid_thread ();
1417 ensure_not_running ();
1419 /* Find out whether we must run in the background. */
1420 gdb::unique_xmalloc_ptr
<char> stripped
= strip_bg_char (arg
, &async_exec
);
1421 arg
= stripped
.get ();
1423 prepare_execution_command (current_inferior ()->top_target (), async_exec
);
1426 until_break_command (arg
, from_tty
, 0);
1428 until_next_command (from_tty
);
1432 advance_command (const char *arg
, int from_tty
)
1437 ensure_not_tfind_mode ();
1438 ensure_valid_thread ();
1439 ensure_not_running ();
1442 error_no_arg (_("a location"));
1444 /* Find out whether we must run in the background. */
1445 gdb::unique_xmalloc_ptr
<char> stripped
= strip_bg_char (arg
, &async_exec
);
1446 arg
= stripped
.get ();
1448 prepare_execution_command (current_inferior ()->top_target (), async_exec
);
1450 until_break_command (arg
, from_tty
, 1);
1453 /* Return the value of the result of a function at the end of a 'finish'
1454 command/BP. DTOR_DATA (if not NULL) can represent inferior registers
1455 right after an inferior call has finished. */
1458 get_return_value (struct value
*function
, struct type
*value_type
)
1460 regcache
*stop_regs
= get_current_regcache ();
1461 struct gdbarch
*gdbarch
= stop_regs
->arch ();
1462 struct value
*value
;
1464 value_type
= check_typedef (value_type
);
1465 gdb_assert (value_type
->code () != TYPE_CODE_VOID
);
1467 /* FIXME: 2003-09-27: When returning from a nested inferior function
1468 call, it's possible (with no help from the architecture vector)
1469 to locate and return/print a "struct return" value. This is just
1470 a more complicated case of what is already being done in the
1471 inferior function call code. In fact, when inferior function
1472 calls are made async, this will likely be made the norm. */
1474 switch (gdbarch_return_value (gdbarch
, function
, value_type
,
1477 case RETURN_VALUE_REGISTER_CONVENTION
:
1478 case RETURN_VALUE_ABI_RETURNS_ADDRESS
:
1479 case RETURN_VALUE_ABI_PRESERVES_ADDRESS
:
1480 value
= allocate_value (value_type
);
1481 gdbarch_return_value (gdbarch
, function
, value_type
, stop_regs
,
1482 value_contents_raw (value
), NULL
);
1484 case RETURN_VALUE_STRUCT_CONVENTION
:
1488 internal_error (__FILE__
, __LINE__
, _("bad switch"));
1494 /* The captured function return value/type and its position in the
1497 struct return_value_info
1499 /* The captured return value. May be NULL if we weren't able to
1500 retrieve it. See get_return_value. */
1501 struct value
*value
;
1503 /* The return type. In some cases, we'll not be able extract the
1504 return value, but we always know the type. */
1507 /* If we captured a value, this is the value history index. */
1508 int value_history_index
;
1511 /* Helper for print_return_value. */
1514 print_return_value_1 (struct ui_out
*uiout
, struct return_value_info
*rv
)
1516 if (rv
->value
!= NULL
)
1518 struct value_print_options opts
;
1521 uiout
->text ("Value returned is ");
1522 uiout
->field_fmt ("gdb-result-var", "$%d",
1523 rv
->value_history_index
);
1524 uiout
->text (" = ");
1525 get_user_print_options (&opts
);
1527 if (opts
.finish_print
)
1530 value_print (rv
->value
, &stb
, &opts
);
1531 uiout
->field_stream ("return-value", stb
);
1534 uiout
->field_string ("return-value", _("<not displayed>"),
1535 metadata_style
.style ());
1540 std::string type_name
= type_to_string (rv
->type
);
1541 uiout
->text ("Value returned has type: ");
1542 uiout
->field_string ("return-type", type_name
);
1544 uiout
->text (" Cannot determine contents\n");
1548 /* Print the result of a function at the end of a 'finish' command.
1549 RV points at an object representing the captured return value/type
1550 and its position in the value history. */
1553 print_return_value (struct ui_out
*uiout
, struct return_value_info
*rv
)
1555 if (rv
->type
== NULL
1556 || check_typedef (rv
->type
)->code () == TYPE_CODE_VOID
)
1561 /* print_return_value_1 can throw an exception in some
1562 circumstances. We need to catch this so that we still
1563 delete the breakpoint. */
1564 print_return_value_1 (uiout
, rv
);
1566 catch (const gdb_exception
&ex
)
1568 exception_print (gdb_stdout
, ex
);
1572 /* Data for the FSM that manages the finish command. */
1574 struct finish_command_fsm
: public thread_fsm
1576 /* The momentary breakpoint set at the function's return address in
1578 breakpoint_up breakpoint
;
1580 /* The function that we're stepping out of. */
1581 struct symbol
*function
= nullptr;
1583 /* If the FSM finishes successfully, this stores the function's
1585 struct return_value_info return_value_info
{};
1587 explicit finish_command_fsm (struct interp
*cmd_interp
)
1588 : thread_fsm (cmd_interp
)
1592 bool should_stop (struct thread_info
*thread
) override
;
1593 void clean_up (struct thread_info
*thread
) override
;
1594 struct return_value_info
*return_value () override
;
1595 enum async_reply_reason
do_async_reply_reason () override
;
1598 /* Implementation of the 'should_stop' FSM method for the finish
1599 commands. Detects whether the thread stepped out of the function
1600 successfully, and if so, captures the function's return value and
1601 marks the FSM finished. */
1604 finish_command_fsm::should_stop (struct thread_info
*tp
)
1606 struct return_value_info
*rv
= &return_value_info
;
1608 if (function
!= NULL
1609 && bpstat_find_breakpoint (tp
->control
.stop_bpstat
,
1610 breakpoint
.get ()) != NULL
)
1615 rv
->type
= TYPE_TARGET_TYPE (SYMBOL_TYPE (function
));
1616 if (rv
->type
== NULL
)
1617 internal_error (__FILE__
, __LINE__
,
1618 _("finish_command: function has no target type"));
1620 if (check_typedef (rv
->type
)->code () != TYPE_CODE_VOID
)
1624 func
= read_var_value (function
, NULL
, get_current_frame ());
1625 rv
->value
= get_return_value (func
, rv
->type
);
1626 if (rv
->value
!= NULL
)
1627 rv
->value_history_index
= record_latest_value (rv
->value
);
1630 else if (tp
->control
.stop_step
)
1632 /* Finishing from an inline frame, or reverse finishing. In
1633 either case, there's no way to retrieve the return value. */
1640 /* Implementation of the 'clean_up' FSM method for the finish
1644 finish_command_fsm::clean_up (struct thread_info
*thread
)
1646 breakpoint
.reset ();
1647 delete_longjmp_breakpoint (thread
->global_num
);
1650 /* Implementation of the 'return_value' FSM method for the finish
1653 struct return_value_info
*
1654 finish_command_fsm::return_value ()
1656 return &return_value_info
;
1659 /* Implementation of the 'async_reply_reason' FSM method for the
1662 enum async_reply_reason
1663 finish_command_fsm::do_async_reply_reason ()
1665 if (execution_direction
== EXEC_REVERSE
)
1666 return EXEC_ASYNC_END_STEPPING_RANGE
;
1668 return EXEC_ASYNC_FUNCTION_FINISHED
;
1671 /* finish_backward -- helper function for finish_command. */
1674 finish_backward (struct finish_command_fsm
*sm
)
1676 struct symtab_and_line sal
;
1677 struct thread_info
*tp
= inferior_thread ();
1679 CORE_ADDR func_addr
;
1681 pc
= get_frame_pc (get_current_frame ());
1683 if (find_pc_partial_function (pc
, NULL
, &func_addr
, NULL
) == 0)
1684 error (_("Cannot find bounds of current function"));
1686 sal
= find_pc_line (func_addr
, 0);
1688 tp
->control
.proceed_to_finish
= 1;
1689 /* Special case: if we're sitting at the function entry point,
1690 then all we need to do is take a reverse singlestep. We
1691 don't need to set a breakpoint, and indeed it would do us
1694 Note that this can only happen at frame #0, since there's
1695 no way that a function up the stack can have a return address
1696 that's equal to its entry point. */
1700 struct frame_info
*frame
= get_selected_frame (NULL
);
1701 struct gdbarch
*gdbarch
= get_frame_arch (frame
);
1703 /* Set a step-resume at the function's entry point. Once that's
1704 hit, we'll do one more step backwards. */
1705 symtab_and_line sr_sal
;
1707 sr_sal
.pspace
= get_frame_program_space (frame
);
1708 insert_step_resume_breakpoint_at_sal (gdbarch
,
1709 sr_sal
, null_frame_id
);
1711 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
1715 /* We're almost there -- we just need to back up by one more
1717 tp
->control
.step_range_start
= tp
->control
.step_range_end
= 1;
1718 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
1722 /* finish_forward -- helper function for finish_command. FRAME is the
1723 frame that called the function we're about to step out of. */
1726 finish_forward (struct finish_command_fsm
*sm
, struct frame_info
*frame
)
1728 struct frame_id frame_id
= get_frame_id (frame
);
1729 struct gdbarch
*gdbarch
= get_frame_arch (frame
);
1730 struct symtab_and_line sal
;
1731 struct thread_info
*tp
= inferior_thread ();
1733 sal
= find_pc_line (get_frame_pc (frame
), 0);
1734 sal
.pc
= get_frame_pc (frame
);
1736 sm
->breakpoint
= set_momentary_breakpoint (gdbarch
, sal
,
1737 get_stack_frame_id (frame
),
1740 /* set_momentary_breakpoint invalidates FRAME. */
1743 set_longjmp_breakpoint (tp
, frame_id
);
1745 /* We want to print return value, please... */
1746 tp
->control
.proceed_to_finish
= 1;
1748 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
1751 /* Skip frames for "finish". */
1753 static struct frame_info
*
1754 skip_finish_frames (struct frame_info
*frame
)
1756 struct frame_info
*start
;
1762 frame
= skip_tailcall_frames (frame
);
1766 frame
= skip_unwritable_frames (frame
);
1770 while (start
!= frame
);
1775 /* "finish": Set a temporary breakpoint at the place the selected
1776 frame will return to, then continue. */
1779 finish_command (const char *arg
, int from_tty
)
1781 struct frame_info
*frame
;
1783 struct finish_command_fsm
*sm
;
1784 struct thread_info
*tp
;
1787 ensure_not_tfind_mode ();
1788 ensure_valid_thread ();
1789 ensure_not_running ();
1791 /* Find out whether we must run in the background. */
1792 gdb::unique_xmalloc_ptr
<char> stripped
= strip_bg_char (arg
, &async_exec
);
1793 arg
= stripped
.get ();
1795 prepare_execution_command (current_inferior ()->top_target (), async_exec
);
1798 error (_("The \"finish\" command does not take any arguments."));
1800 frame
= get_prev_frame (get_selected_frame (_("No selected frame.")));
1802 error (_("\"finish\" not meaningful in the outermost frame."));
1804 clear_proceed_status (0);
1806 tp
= inferior_thread ();
1808 sm
= new finish_command_fsm (command_interp ());
1810 tp
->thread_fsm
= sm
;
1812 /* Finishing from an inline frame is completely different. We don't
1813 try to show the "return value" - no way to locate it. */
1814 if (get_frame_type (get_selected_frame (_("No selected frame.")))
1817 /* Claim we are stepping in the calling frame. An empty step
1818 range means that we will stop once we aren't in a function
1819 called by that frame. We don't use the magic "1" value for
1820 step_range_end, because then infrun will think this is nexti,
1821 and not step over the rest of this inlined function call. */
1822 set_step_info (tp
, frame
, {});
1823 tp
->control
.step_range_start
= get_frame_pc (frame
);
1824 tp
->control
.step_range_end
= tp
->control
.step_range_start
;
1825 tp
->control
.step_over_calls
= STEP_OVER_ALL
;
1827 /* Print info on the selected frame, including level number but not
1831 printf_filtered (_("Run till exit from "));
1832 print_stack_frame (get_selected_frame (NULL
), 1, LOCATION
, 0);
1835 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
1839 /* Find the function we will return from. */
1841 sm
->function
= find_pc_function (get_frame_pc (get_selected_frame (NULL
)));
1843 /* Print info on the selected frame, including level number but not
1847 if (execution_direction
== EXEC_REVERSE
)
1848 printf_filtered (_("Run back to call of "));
1851 if (sm
->function
!= NULL
&& TYPE_NO_RETURN (sm
->function
->type
)
1852 && !query (_("warning: Function %s does not return normally.\n"
1853 "Try to finish anyway? "),
1854 sm
->function
->print_name ()))
1855 error (_("Not confirmed."));
1856 printf_filtered (_("Run till exit from "));
1859 print_stack_frame (get_selected_frame (NULL
), 1, LOCATION
, 0);
1862 if (execution_direction
== EXEC_REVERSE
)
1863 finish_backward (sm
);
1866 frame
= skip_finish_frames (frame
);
1869 error (_("Cannot find the caller frame."));
1871 finish_forward (sm
, frame
);
1877 info_program_command (const char *args
, int from_tty
)
1882 process_stratum_target
*proc_target
;
1884 if (!target_has_execution ())
1886 printf_filtered (_("The program being debugged is not being run.\n"));
1892 ptid
= inferior_ptid
;
1893 proc_target
= current_inferior ()->process_target ();
1896 get_last_target_status (&proc_target
, &ptid
, nullptr);
1898 if (ptid
== null_ptid
|| ptid
== minus_one_ptid
)
1899 error (_("No selected thread."));
1901 thread_info
*tp
= find_thread_ptid (proc_target
, ptid
);
1903 if (tp
->state
== THREAD_EXITED
)
1904 error (_("Invalid selected thread."));
1905 else if (tp
->state
== THREAD_RUNNING
)
1906 error (_("Selected thread is running."));
1908 bs
= tp
->control
.stop_bpstat
;
1909 stat
= bpstat_num (&bs
, &num
);
1911 target_files_info ();
1912 printf_filtered (_("Program stopped at %s.\n"),
1913 paddress (target_gdbarch (), tp
->suspend
.stop_pc
));
1914 if (tp
->control
.stop_step
)
1915 printf_filtered (_("It stopped after being stepped.\n"));
1918 /* There may be several breakpoints in the same place, so this
1919 isn't as strange as it seems. */
1924 printf_filtered (_("It stopped at a breakpoint "
1925 "that has since been deleted.\n"));
1928 printf_filtered (_("It stopped at breakpoint %d.\n"), num
);
1929 stat
= bpstat_num (&bs
, &num
);
1932 else if (tp
->suspend
.stop_signal
!= GDB_SIGNAL_0
)
1934 printf_filtered (_("It stopped with signal %s, %s.\n"),
1935 gdb_signal_to_name (tp
->suspend
.stop_signal
),
1936 gdb_signal_to_string (tp
->suspend
.stop_signal
));
1941 printf_filtered (_("Type \"info stack\" or \"info "
1942 "registers\" for more information.\n"));
1947 environment_info (const char *var
, int from_tty
)
1951 const char *val
= current_inferior ()->environment
.get (var
);
1955 puts_filtered (var
);
1956 puts_filtered (" = ");
1957 puts_filtered (val
);
1958 puts_filtered ("\n");
1962 puts_filtered ("Environment variable \"");
1963 puts_filtered (var
);
1964 puts_filtered ("\" not defined.\n");
1969 char **envp
= current_inferior ()->environment
.envp ();
1971 for (int idx
= 0; envp
[idx
] != NULL
; ++idx
)
1973 puts_filtered (envp
[idx
]);
1974 puts_filtered ("\n");
1980 set_environment_command (const char *arg
, int from_tty
)
1982 const char *p
, *val
;
1986 error_no_arg (_("environment variable and value"));
1988 /* Find separation between variable name and value. */
1989 p
= (char *) strchr (arg
, '=');
1990 val
= (char *) strchr (arg
, ' ');
1992 if (p
!= 0 && val
!= 0)
1994 /* We have both a space and an equals. If the space is before the
1995 equals, walk forward over the spaces til we see a nonspace
1996 (possibly the equals). */
2001 /* Now if the = is after the char following the spaces,
2002 take the char following the spaces. */
2006 else if (val
!= 0 && p
== 0)
2010 error_no_arg (_("environment variable to set"));
2012 if (p
== 0 || p
[1] == 0)
2016 p
= arg
+ strlen (arg
); /* So that savestring below will work. */
2020 /* Not setting variable value to null. */
2022 while (*val
== ' ' || *val
== '\t')
2026 while (p
!= arg
&& (p
[-1] == ' ' || p
[-1] == '\t'))
2029 std::string
var (arg
, p
- arg
);
2032 printf_filtered (_("Setting environment variable "
2033 "\"%s\" to null value.\n"),
2035 current_inferior ()->environment
.set (var
.c_str (), "");
2038 current_inferior ()->environment
.set (var
.c_str (), val
);
2042 unset_environment_command (const char *var
, int from_tty
)
2046 /* If there is no argument, delete all environment variables.
2047 Ask for confirmation if reading from the terminal. */
2048 if (!from_tty
|| query (_("Delete all environment variables? ")))
2049 current_inferior ()->environment
.clear ();
2052 current_inferior ()->environment
.unset (var
);
2055 /* Handle the execution path (PATH variable). */
2057 static const char path_var_name
[] = "PATH";
2060 path_info (const char *args
, int from_tty
)
2062 puts_filtered ("Executable and object file path: ");
2063 puts_filtered (current_inferior ()->environment
.get (path_var_name
));
2064 puts_filtered ("\n");
2067 /* Add zero or more directories to the front of the execution path. */
2070 path_command (const char *dirname
, int from_tty
)
2076 env
= current_inferior ()->environment
.get (path_var_name
);
2077 /* Can be null if path is not set. */
2080 exec_path
= xstrdup (env
);
2081 mod_path (dirname
, &exec_path
);
2082 current_inferior ()->environment
.set (path_var_name
, exec_path
);
2085 path_info (NULL
, from_tty
);
2090 pad_to_column (string_file
&stream
, int col
)
2092 /* At least one space must be printed to separate columns. */
2094 const int size
= stream
.size ();
2096 stream
.puts (n_spaces (col
- size
));
2099 /* Print out the register NAME with value VAL, to FILE, in the default
2103 default_print_one_register_info (struct ui_file
*file
,
2107 struct type
*regtype
= value_type (val
);
2108 int print_raw_format
;
2109 string_file format_stream
;
2112 value_column_1
= 15,
2113 /* Give enough room for "0x", 16 hex digits and two spaces in
2114 preceding column. */
2115 value_column_2
= value_column_1
+ 2 + 16 + 2,
2118 format_stream
.puts (name
);
2119 pad_to_column (format_stream
, value_column_1
);
2121 print_raw_format
= (value_entirely_available (val
)
2122 && !value_optimized_out (val
));
2124 /* If virtual format is floating, print it that way, and in raw
2126 if (regtype
->code () == TYPE_CODE_FLT
2127 || regtype
->code () == TYPE_CODE_DECFLOAT
)
2129 struct value_print_options opts
;
2130 const gdb_byte
*valaddr
= value_contents_for_printing (val
);
2131 enum bfd_endian byte_order
= type_byte_order (regtype
);
2133 get_user_print_options (&opts
);
2136 common_val_print (val
, &format_stream
, 0, &opts
, current_language
);
2138 if (print_raw_format
)
2140 pad_to_column (format_stream
, value_column_2
);
2141 format_stream
.puts ("(raw ");
2142 print_hex_chars (&format_stream
, valaddr
, TYPE_LENGTH (regtype
),
2144 format_stream
.putc (')');
2149 struct value_print_options opts
;
2151 /* Print the register in hex. */
2152 get_formatted_print_options (&opts
, 'x');
2154 common_val_print (val
, &format_stream
, 0, &opts
, current_language
);
2155 /* If not a vector register, print it also according to its
2157 if (print_raw_format
&& regtype
->is_vector () == 0)
2159 pad_to_column (format_stream
, value_column_2
);
2160 get_user_print_options (&opts
);
2162 common_val_print (val
, &format_stream
, 0, &opts
, current_language
);
2166 fputs_filtered (format_stream
.c_str (), file
);
2167 fprintf_filtered (file
, "\n");
2170 /* Print out the machine register regnum. If regnum is -1, print all
2171 registers (print_all == 1) or all non-float and non-vector
2172 registers (print_all == 0).
2174 For most machines, having all_registers_info() print the
2175 register(s) one per line is good enough. If a different format is
2176 required, (eg, for MIPS or Pyramid 90x, which both have lots of
2177 regs), or there is an existing convention for showing all the
2178 registers, define the architecture method PRINT_REGISTERS_INFO to
2179 provide that format. */
2182 default_print_registers_info (struct gdbarch
*gdbarch
,
2183 struct ui_file
*file
,
2184 struct frame_info
*frame
,
2185 int regnum
, int print_all
)
2188 const int numregs
= gdbarch_num_cooked_regs (gdbarch
);
2190 for (i
= 0; i
< numregs
; i
++)
2192 /* Decide between printing all regs, non-float / vector regs, or
2198 if (!gdbarch_register_reggroup_p (gdbarch
, i
, all_reggroup
))
2203 if (!gdbarch_register_reggroup_p (gdbarch
, i
, general_reggroup
))
2213 /* If the register name is empty, it is undefined for this
2214 processor, so don't display anything. */
2215 if (gdbarch_register_name (gdbarch
, i
) == NULL
2216 || *(gdbarch_register_name (gdbarch
, i
)) == '\0')
2219 default_print_one_register_info (file
,
2220 gdbarch_register_name (gdbarch
, i
),
2221 value_of_register (i
, frame
));
2226 registers_info (const char *addr_exp
, int fpregs
)
2228 struct frame_info
*frame
;
2229 struct gdbarch
*gdbarch
;
2231 if (!target_has_registers ())
2232 error (_("The program has no registers now."));
2233 frame
= get_selected_frame (NULL
);
2234 gdbarch
= get_frame_arch (frame
);
2238 gdbarch_print_registers_info (gdbarch
, gdb_stdout
,
2243 while (*addr_exp
!= '\0')
2248 /* Skip leading white space. */
2249 addr_exp
= skip_spaces (addr_exp
);
2251 /* Discard any leading ``$''. Check that there is something
2252 resembling a register following it. */
2253 if (addr_exp
[0] == '$')
2255 if (isspace ((*addr_exp
)) || (*addr_exp
) == '\0')
2256 error (_("Missing register name"));
2258 /* Find the start/end of this register name/num/group. */
2260 while ((*addr_exp
) != '\0' && !isspace ((*addr_exp
)))
2264 /* Figure out what we've found and display it. */
2266 /* A register name? */
2268 int regnum
= user_reg_map_name_to_regnum (gdbarch
, start
, end
- start
);
2272 /* User registers lie completely outside of the range of
2273 normal registers. Catch them early so that the target
2275 if (regnum
>= gdbarch_num_cooked_regs (gdbarch
))
2277 struct value
*regval
= value_of_user_reg (regnum
, frame
);
2278 const char *regname
= user_reg_map_regnum_to_name (gdbarch
,
2281 /* Print in the same fashion
2282 gdbarch_print_registers_info's default
2283 implementation prints. */
2284 default_print_one_register_info (gdb_stdout
,
2289 gdbarch_print_registers_info (gdbarch
, gdb_stdout
,
2290 frame
, regnum
, fpregs
);
2295 /* A register group? */
2297 struct reggroup
*group
;
2299 for (group
= reggroup_next (gdbarch
, NULL
);
2301 group
= reggroup_next (gdbarch
, group
))
2303 /* Don't bother with a length check. Should the user
2304 enter a short register group name, go with the first
2305 group that matches. */
2306 if (strncmp (start
, reggroup_name (group
), end
- start
) == 0)
2314 regnum
< gdbarch_num_cooked_regs (gdbarch
);
2317 if (gdbarch_register_reggroup_p (gdbarch
, regnum
, group
))
2318 gdbarch_print_registers_info (gdbarch
,
2326 /* Nothing matched. */
2327 error (_("Invalid register `%.*s'"), (int) (end
- start
), start
);
2332 info_all_registers_command (const char *addr_exp
, int from_tty
)
2334 registers_info (addr_exp
, 1);
2338 info_registers_command (const char *addr_exp
, int from_tty
)
2340 registers_info (addr_exp
, 0);
2344 print_vector_info (struct ui_file
*file
,
2345 struct frame_info
*frame
, const char *args
)
2347 struct gdbarch
*gdbarch
= get_frame_arch (frame
);
2349 if (gdbarch_print_vector_info_p (gdbarch
))
2350 gdbarch_print_vector_info (gdbarch
, file
, frame
, args
);
2354 int printed_something
= 0;
2356 for (regnum
= 0; regnum
< gdbarch_num_cooked_regs (gdbarch
); regnum
++)
2358 if (gdbarch_register_reggroup_p (gdbarch
, regnum
, vector_reggroup
))
2360 printed_something
= 1;
2361 gdbarch_print_registers_info (gdbarch
, file
, frame
, regnum
, 1);
2364 if (!printed_something
)
2365 fprintf_filtered (file
, "No vector information\n");
2370 info_vector_command (const char *args
, int from_tty
)
2372 if (!target_has_registers ())
2373 error (_("The program has no registers now."));
2375 print_vector_info (gdb_stdout
, get_selected_frame (NULL
), args
);
2378 /* Kill the inferior process. Make us have no inferior. */
2381 kill_command (const char *arg
, int from_tty
)
2383 /* FIXME: This should not really be inferior_ptid (or target_has_execution).
2384 It should be a distinct flag that indicates that a target is active, cuz
2385 some targets don't have processes! */
2387 if (inferior_ptid
== null_ptid
)
2388 error (_("The program is not being run."));
2389 if (!query (_("Kill the program being debugged? ")))
2390 error (_("Not confirmed."));
2392 int pid
= current_inferior ()->pid
;
2393 /* Save the pid as a string before killing the inferior, since that
2394 may unpush the current target, and we need the string after. */
2395 std::string pid_str
= target_pid_to_str (ptid_t (pid
));
2396 int infnum
= current_inferior ()->num
;
2400 if (print_inferior_events
)
2401 printf_unfiltered (_("[Inferior %d (%s) killed]\n"),
2402 infnum
, pid_str
.c_str ());
2404 bfd_cache_close_all ();
2407 /* Used in `attach&' command. Proceed threads of inferior INF iff
2408 they stopped due to debugger request, and when they did, they
2409 reported a clean stop (GDB_SIGNAL_0). Do not proceed threads that
2410 have been explicitly been told to stop. */
2413 proceed_after_attach (inferior
*inf
)
2415 /* Don't error out if the current thread is running, because
2416 there may be other stopped threads. */
2418 /* Backup current thread and selected frame. */
2419 scoped_restore_current_thread restore_thread
;
2421 for (thread_info
*thread
: inf
->non_exited_threads ())
2422 if (!thread
->executing
2423 && !thread
->stop_requested
2424 && thread
->suspend
.stop_signal
== GDB_SIGNAL_0
)
2426 switch_to_thread (thread
);
2427 clear_proceed_status (0);
2428 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
2432 /* See inferior.h. */
2435 setup_inferior (int from_tty
)
2437 struct inferior
*inferior
;
2439 inferior
= current_inferior ();
2440 inferior
->needs_setup
= 0;
2442 /* If no exec file is yet known, try to determine it from the
2444 if (get_exec_file (0) == NULL
)
2445 exec_file_locate_attach (inferior_ptid
.pid (), 1, from_tty
);
2448 reopen_exec_file ();
2452 /* Take any necessary post-attaching actions for this platform. */
2453 target_post_attach (inferior_ptid
.pid ());
2455 post_create_inferior (from_tty
);
2458 /* What to do after the first program stops after attaching. */
2459 enum attach_post_wait_mode
2461 /* Do nothing. Leaves threads as they are. */
2462 ATTACH_POST_WAIT_NOTHING
,
2464 /* Re-resume threads that are marked running. */
2465 ATTACH_POST_WAIT_RESUME
,
2467 /* Stop all threads. */
2468 ATTACH_POST_WAIT_STOP
,
2471 /* Called after we've attached to a process and we've seen it stop for
2472 the first time. Resume, stop, or don't touch the threads according
2476 attach_post_wait (int from_tty
, enum attach_post_wait_mode mode
)
2478 struct inferior
*inferior
;
2480 inferior
= current_inferior ();
2481 inferior
->control
.stop_soon
= NO_STOP_QUIETLY
;
2483 if (inferior
->needs_setup
)
2484 setup_inferior (from_tty
);
2486 if (mode
== ATTACH_POST_WAIT_RESUME
)
2488 /* The user requested an `attach&', so be sure to leave threads
2489 that didn't get a signal running. */
2491 /* Immediately resume all suspended threads of this inferior,
2492 and this inferior only. This should have no effect on
2493 already running threads. If a thread has been stopped with a
2494 signal, leave it be. */
2496 proceed_after_attach (inferior
);
2499 if (inferior_thread ()->suspend
.stop_signal
== GDB_SIGNAL_0
)
2501 clear_proceed_status (0);
2502 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
2506 else if (mode
== ATTACH_POST_WAIT_STOP
)
2508 /* The user requested a plain `attach', so be sure to leave
2509 the inferior stopped. */
2511 /* At least the current thread is already stopped. */
2513 /* In all-stop, by definition, all threads have to be already
2514 stopped at this point. In non-stop, however, although the
2515 selected thread is stopped, others may still be executing.
2516 Be sure to explicitly stop all threads of the process. This
2517 should have no effect on already stopped threads. */
2519 target_stop (ptid_t (inferior
->pid
));
2520 else if (target_is_non_stop_p ())
2522 struct thread_info
*lowest
= inferior_thread ();
2524 stop_all_threads ();
2526 /* It's not defined which thread will report the attach
2527 stop. For consistency, always select the thread with
2528 lowest GDB number, which should be the main thread, if it
2530 for (thread_info
*thread
: current_inferior ()->non_exited_threads ())
2531 if (thread
->inf
->num
< lowest
->inf
->num
2532 || thread
->per_inf_num
< lowest
->per_inf_num
)
2535 switch_to_thread (lowest
);
2538 /* Tell the user/frontend where we're stopped. */
2540 if (deprecated_attach_hook
)
2541 deprecated_attach_hook ();
2545 /* "attach" command entry point. Takes a program started up outside
2546 of gdb and ``attaches'' to it. This stops it cold in its tracks
2547 and allows us to start debugging it. */
2550 attach_command (const char *args
, int from_tty
)
2553 struct target_ops
*attach_target
;
2554 struct inferior
*inferior
= current_inferior ();
2555 enum attach_post_wait_mode mode
;
2557 dont_repeat (); /* Not for the faint of heart */
2559 scoped_disable_commit_resumed
disable_commit_resumed ("attaching");
2561 if (gdbarch_has_global_solist (target_gdbarch ()))
2562 /* Don't complain if all processes share the same symbol
2565 else if (target_has_execution ())
2567 if (query (_("A program is being debugged already. Kill it? ")))
2570 error (_("Not killed."));
2573 /* Clean up any leftovers from other runs. Some other things from
2574 this function should probably be moved into target_pre_inferior. */
2575 target_pre_inferior (from_tty
);
2577 gdb::unique_xmalloc_ptr
<char> stripped
= strip_bg_char (args
, &async_exec
);
2578 args
= stripped
.get ();
2580 attach_target
= find_attach_target ();
2582 prepare_execution_command (attach_target
, async_exec
);
2584 if (non_stop
&& !attach_target
->supports_non_stop ())
2585 error (_("Cannot attach to this target in non-stop mode"));
2587 attach_target
->attach (args
, from_tty
);
2588 /* to_attach should push the target, so after this point we
2589 shouldn't refer to attach_target again. */
2590 attach_target
= NULL
;
2592 /* Set up the "saved terminal modes" of the inferior
2593 based on what modes we are starting it with. */
2594 target_terminal::init ();
2596 /* Install inferior's terminal modes. This may look like a no-op,
2597 as we've just saved them above, however, this does more than
2598 restore terminal settings:
2600 - installs a SIGINT handler that forwards SIGINT to the inferior.
2601 Otherwise a Ctrl-C pressed just while waiting for the initial
2602 stop would end up as a spurious Quit.
2604 - removes stdin from the event loop, which we need if attaching
2605 in the foreground, otherwise on targets that report an initial
2606 stop on attach (which are most) we'd process input/commands
2607 while we're in the event loop waiting for that stop. That is,
2608 before the attach continuation runs and the command is really
2610 target_terminal::inferior ();
2612 /* Set up execution context to know that we should return from
2613 wait_for_inferior as soon as the target reports a stop. */
2614 init_wait_for_inferior ();
2616 inferior
->needs_setup
= 1;
2618 if (target_is_non_stop_p ())
2620 /* If we find that the current thread isn't stopped, explicitly
2621 do so now, because we're going to install breakpoints and
2625 /* The user requested an `attach&'; stop just one thread. */
2626 target_stop (inferior_ptid
);
2628 /* The user requested an `attach', so stop all threads of this
2630 target_stop (ptid_t (inferior_ptid
.pid ()));
2633 /* Check for exec file mismatch, and let the user solve it. */
2634 validate_exec_file (from_tty
);
2636 mode
= async_exec
? ATTACH_POST_WAIT_RESUME
: ATTACH_POST_WAIT_STOP
;
2638 /* Some system don't generate traps when attaching to inferior.
2639 E.g. Mach 3 or GNU hurd. */
2640 if (!target_attach_no_wait ())
2642 /* Careful here. See comments in inferior.h. Basically some
2643 OSes don't ignore SIGSTOPs on continue requests anymore. We
2644 need a way for handle_inferior_event to reset the stop_signal
2645 variable after an attach, and this is what
2646 STOP_QUIETLY_NO_SIGSTOP is for. */
2647 inferior
->control
.stop_soon
= STOP_QUIETLY_NO_SIGSTOP
;
2649 /* Wait for stop. */
2650 inferior
->add_continuation ([=] ()
2652 attach_post_wait (from_tty
, mode
);
2655 /* Let infrun consider waiting for events out of this
2657 inferior
->process_target ()->threads_executing
= true;
2659 if (!target_is_async_p ())
2660 mark_infrun_async_event_handler ();
2664 attach_post_wait (from_tty
, mode
);
2666 disable_commit_resumed
.reset_and_commit ();
2669 /* We had just found out that the target was already attached to an
2670 inferior. PTID points at a thread of this new inferior, that is
2671 the most likely to be stopped right now, but not necessarily so.
2672 The new inferior is assumed to be already added to the inferior
2673 list at this point. If LEAVE_RUNNING, then leave the threads of
2674 this inferior running, except those we've explicitly seen reported
2678 notice_new_inferior (thread_info
*thr
, bool leave_running
, int from_tty
)
2680 enum attach_post_wait_mode mode
2681 = leave_running
? ATTACH_POST_WAIT_RESUME
: ATTACH_POST_WAIT_NOTHING
;
2683 gdb::optional
<scoped_restore_current_thread
> restore_thread
;
2685 if (inferior_ptid
!= null_ptid
)
2686 restore_thread
.emplace ();
2688 /* Avoid reading registers -- we haven't fetched the target
2690 switch_to_thread_no_regs (thr
);
2692 /* When we "notice" a new inferior we need to do all the things we
2693 would normally do if we had just attached to it. */
2697 struct inferior
*inferior
= current_inferior ();
2699 /* We're going to install breakpoints, and poke at memory,
2700 ensure that the inferior is stopped for a moment while we do
2702 target_stop (inferior_ptid
);
2704 inferior
->control
.stop_soon
= STOP_QUIETLY_REMOTE
;
2706 /* Wait for stop before proceeding. */
2707 inferior
->add_continuation ([=] ()
2709 attach_post_wait (from_tty
, mode
);
2715 attach_post_wait (from_tty
, mode
);
2720 * takes a program previously attached to and detaches it.
2721 * The program resumes execution and will no longer stop
2722 * on signals, etc. We better not have left any breakpoints
2723 * in the program or it'll die when it hits one. For this
2724 * to work, it may be necessary for the process to have been
2725 * previously attached. It *might* work if the program was
2726 * started via the normal ptrace (PTRACE_TRACEME).
2730 detach_command (const char *args
, int from_tty
)
2732 dont_repeat (); /* Not for the faint of heart. */
2734 if (inferior_ptid
== null_ptid
)
2735 error (_("The program is not being run."));
2737 scoped_disable_commit_resumed
disable_commit_resumed ("detaching");
2739 query_if_trace_running (from_tty
);
2741 disconnect_tracing ();
2743 /* Hold a strong reference to the target while (maybe)
2744 detaching the parent. Otherwise detaching could close the
2747 = target_ops_ref::new_reference (current_inferior ()->process_target ());
2749 /* Save this before detaching, since detaching may unpush the
2750 process_stratum target. */
2751 bool was_non_stop_p
= target_is_non_stop_p ();
2753 target_detach (current_inferior (), from_tty
);
2755 /* The current inferior process was just detached successfully. Get
2756 rid of breakpoints that no longer make sense. Note we don't do
2757 this within target_detach because that is also used when
2758 following child forks, and in that case we will want to transfer
2759 breakpoints to the child, not delete them. */
2760 breakpoint_init_inferior (inf_exited
);
2762 /* If the solist is global across inferiors, don't clear it when we
2763 detach from a single inferior. */
2764 if (!gdbarch_has_global_solist (target_gdbarch ()))
2765 no_shared_libraries (NULL
, from_tty
);
2767 if (deprecated_detach_hook
)
2768 deprecated_detach_hook ();
2770 if (!was_non_stop_p
)
2771 restart_after_all_stop_detach (as_process_stratum_target (target_ref
.get ()));
2773 disable_commit_resumed
.reset_and_commit ();
2776 /* Disconnect from the current target without resuming it (leaving it
2777 waiting for a debugger).
2779 We'd better not have left any breakpoints in the program or the
2780 next debugger will get confused. Currently only supported for some
2781 remote targets, since the normal attach mechanisms don't work on
2782 stopped processes on some native platforms (e.g. GNU/Linux). */
2785 disconnect_command (const char *args
, int from_tty
)
2787 dont_repeat (); /* Not for the faint of heart. */
2788 query_if_trace_running (from_tty
);
2789 disconnect_tracing ();
2790 target_disconnect (args
, from_tty
);
2791 no_shared_libraries (NULL
, from_tty
);
2792 init_thread_list ();
2793 if (deprecated_detach_hook
)
2794 deprecated_detach_hook ();
2797 /* Stop PTID in the current target, and tag the PTID threads as having
2798 been explicitly requested to stop. PTID can be a thread, a
2799 process, or minus_one_ptid, meaning all threads of all inferiors of
2800 the current target. */
2803 stop_current_target_threads_ns (ptid_t ptid
)
2807 /* Tag the thread as having been explicitly requested to stop, so
2808 other parts of gdb know not to resume this thread automatically,
2809 if it was stopped due to an internal event. Limit this to
2810 non-stop mode, as when debugging a multi-threaded application in
2811 all-stop mode, we will only get one stop event --- it's undefined
2812 which thread will report the event. */
2813 set_stop_requested (current_inferior ()->process_target (),
2817 /* See inferior.h. */
2820 interrupt_target_1 (bool all_threads
)
2822 scoped_disable_commit_resumed
disable_commit_resumed ("interrupting");
2828 scoped_restore_current_thread restore_thread
;
2830 for (inferior
*inf
: all_inferiors ())
2832 switch_to_inferior_no_thread (inf
);
2833 stop_current_target_threads_ns (minus_one_ptid
);
2837 stop_current_target_threads_ns (inferior_ptid
);
2840 target_interrupt ();
2842 disable_commit_resumed
.reset_and_commit ();
2846 Stop the execution of the target while running in async mode, in
2847 the background. In all-stop, stop the whole process. In non-stop
2848 mode, stop the current thread only by default, or stop all threads
2849 if the `-a' switch is used. */
2852 interrupt_command (const char *args
, int from_tty
)
2854 if (target_can_async_p ())
2856 int all_threads
= 0;
2858 dont_repeat (); /* Not for the faint of heart. */
2861 && startswith (args
, "-a"))
2864 if (!non_stop
&& all_threads
)
2865 error (_("-a is meaningless in all-stop mode."));
2867 interrupt_target_1 (all_threads
);
2871 /* See inferior.h. */
2874 default_print_float_info (struct gdbarch
*gdbarch
, struct ui_file
*file
,
2875 struct frame_info
*frame
, const char *args
)
2878 int printed_something
= 0;
2880 for (regnum
= 0; regnum
< gdbarch_num_cooked_regs (gdbarch
); regnum
++)
2882 if (gdbarch_register_reggroup_p (gdbarch
, regnum
, float_reggroup
))
2884 printed_something
= 1;
2885 gdbarch_print_registers_info (gdbarch
, file
, frame
, regnum
, 1);
2888 if (!printed_something
)
2889 fprintf_filtered (file
, "No floating-point info "
2890 "available for this processor.\n");
2894 info_float_command (const char *args
, int from_tty
)
2896 struct frame_info
*frame
;
2898 if (!target_has_registers ())
2899 error (_("The program has no registers now."));
2901 frame
= get_selected_frame (NULL
);
2902 gdbarch_print_float_info (get_frame_arch (frame
), gdb_stdout
, frame
, args
);
2905 /* Implement `info proc' family of commands. */
2908 info_proc_cmd_1 (const char *args
, enum info_proc_what what
, int from_tty
)
2910 struct gdbarch
*gdbarch
= get_current_arch ();
2912 if (!target_info_proc (args
, what
))
2914 if (gdbarch_info_proc_p (gdbarch
))
2915 gdbarch_info_proc (gdbarch
, args
, what
);
2917 error (_("Not supported on this target."));
2921 /* Implement `info proc' when given without any further parameters. */
2924 info_proc_cmd (const char *args
, int from_tty
)
2926 info_proc_cmd_1 (args
, IP_MINIMAL
, from_tty
);
2929 /* Implement `info proc mappings'. */
2932 info_proc_cmd_mappings (const char *args
, int from_tty
)
2934 info_proc_cmd_1 (args
, IP_MAPPINGS
, from_tty
);
2937 /* Implement `info proc stat'. */
2940 info_proc_cmd_stat (const char *args
, int from_tty
)
2942 info_proc_cmd_1 (args
, IP_STAT
, from_tty
);
2945 /* Implement `info proc status'. */
2948 info_proc_cmd_status (const char *args
, int from_tty
)
2950 info_proc_cmd_1 (args
, IP_STATUS
, from_tty
);
2953 /* Implement `info proc cwd'. */
2956 info_proc_cmd_cwd (const char *args
, int from_tty
)
2958 info_proc_cmd_1 (args
, IP_CWD
, from_tty
);
2961 /* Implement `info proc cmdline'. */
2964 info_proc_cmd_cmdline (const char *args
, int from_tty
)
2966 info_proc_cmd_1 (args
, IP_CMDLINE
, from_tty
);
2969 /* Implement `info proc exe'. */
2972 info_proc_cmd_exe (const char *args
, int from_tty
)
2974 info_proc_cmd_1 (args
, IP_EXE
, from_tty
);
2977 /* Implement `info proc files'. */
2980 info_proc_cmd_files (const char *args
, int from_tty
)
2982 info_proc_cmd_1 (args
, IP_FILES
, from_tty
);
2985 /* Implement `info proc all'. */
2988 info_proc_cmd_all (const char *args
, int from_tty
)
2990 info_proc_cmd_1 (args
, IP_ALL
, from_tty
);
2993 /* Implement `show print finish'. */
2996 show_print_finish (struct ui_file
*file
, int from_tty
,
2997 struct cmd_list_element
*c
,
3000 fprintf_filtered (file
, _("\
3001 Printing of return value after `finish' is %s.\n"),
3006 /* This help string is used for the run, start, and starti commands.
3007 It is defined as a macro to prevent duplication. */
3009 #define RUN_ARGS_HELP \
3010 "You may specify arguments to give it.\n\
3011 Args may include \"*\", or \"[...]\"; they are expanded using the\n\
3012 shell that will start the program (specified by the \"$SHELL\" environment\n\
3013 variable). Input and output redirection with \">\", \"<\", or \">>\"\n\
3014 are also allowed.\n\
3016 With no arguments, uses arguments last specified (with \"run\" or \n\
3017 \"set args\"). To cancel previous arguments and run with no arguments,\n\
3018 use \"set args\" without arguments.\n\
3020 To start the inferior without using a shell, use \"set startup-with-shell off\"."
3022 void _initialize_infcmd ();
3024 _initialize_infcmd ()
3026 static struct cmd_list_element
*info_proc_cmdlist
;
3027 struct cmd_list_element
*c
= NULL
;
3028 const char *cmd_name
;
3030 /* Add the filename of the terminal connected to inferior I/O. */
3031 add_setshow_optional_filename_cmd ("inferior-tty", class_run
,
3032 &inferior_io_terminal_scratch
, _("\
3033 Set terminal for future runs of program being debugged."), _("\
3034 Show terminal for future runs of program being debugged."), _("\
3035 Usage: set inferior-tty [TTY]\n\n\
3036 If TTY is omitted, the default behavior of using the same terminal as GDB\n\
3038 set_inferior_tty_command
,
3039 show_inferior_tty_command
,
3040 &setlist
, &showlist
);
3041 cmd_name
= "inferior-tty";
3042 c
= lookup_cmd (&cmd_name
, setlist
, "", NULL
, -1, 1);
3043 gdb_assert (c
!= NULL
);
3044 add_alias_cmd ("tty", c
, class_run
, 0, &cmdlist
);
3047 add_setshow_string_noescape_cmd (cmd_name
, class_run
,
3048 &inferior_args_scratch
, _("\
3049 Set argument list to give program being debugged when it is started."), _("\
3050 Show argument list to give program being debugged when it is started."), _("\
3051 Follow this command with any number of args, to be passed to the program."),
3054 &setlist
, &showlist
);
3055 c
= lookup_cmd (&cmd_name
, setlist
, "", NULL
, -1, 1);
3056 gdb_assert (c
!= NULL
);
3057 set_cmd_completer (c
, filename_completer
);
3060 add_setshow_string_noescape_cmd (cmd_name
, class_run
,
3061 &inferior_cwd_scratch
, _("\
3062 Set the current working directory to be used when the inferior is started.\n\
3063 Changing this setting does not have any effect on inferiors that are\n\
3066 Show the current working directory that is used when the inferior is started."),
3068 Use this command to change the current working directory that will be used\n\
3069 when the inferior is started. This setting does not affect GDB's current\n\
3070 working directory."),
3073 &setlist
, &showlist
);
3074 c
= lookup_cmd (&cmd_name
, setlist
, "", NULL
, -1, 1);
3075 gdb_assert (c
!= NULL
);
3076 set_cmd_completer (c
, filename_completer
);
3078 c
= add_cmd ("environment", no_class
, environment_info
, _("\
3079 The environment to give the program, or one variable's value.\n\
3080 With an argument VAR, prints the value of environment variable VAR to\n\
3081 give the program being debugged. With no arguments, prints the entire\n\
3082 environment to be given to the program."), &showlist
);
3083 set_cmd_completer (c
, noop_completer
);
3085 add_basic_prefix_cmd ("unset", no_class
,
3086 _("Complement to certain \"set\" commands."),
3087 &unsetlist
, 0, &cmdlist
);
3089 c
= add_cmd ("environment", class_run
, unset_environment_command
, _("\
3090 Cancel environment variable VAR for the program.\n\
3091 This does not affect the program until the next \"run\" command."),
3093 set_cmd_completer (c
, noop_completer
);
3095 c
= add_cmd ("environment", class_run
, set_environment_command
, _("\
3096 Set environment variable value to give the program.\n\
3097 Arguments are VAR VALUE where VAR is variable name and VALUE is value.\n\
3098 VALUES of environment variables are uninterpreted strings.\n\
3099 This does not affect the program until the next \"run\" command."),
3101 set_cmd_completer (c
, noop_completer
);
3103 c
= add_com ("path", class_files
, path_command
, _("\
3104 Add directory DIR(s) to beginning of search path for object files.\n\
3105 $cwd in the path means the current working directory.\n\
3106 This path is equivalent to the $PATH shell variable. It is a list of\n\
3107 directories, separated by colons. These directories are searched to find\n\
3108 fully linked executable files and separately compiled object files as \
3110 set_cmd_completer (c
, filename_completer
);
3112 c
= add_cmd ("paths", no_class
, path_info
, _("\
3113 Current search path for finding object files.\n\
3114 $cwd in the path means the current working directory.\n\
3115 This path is equivalent to the $PATH shell variable. It is a list of\n\
3116 directories, separated by colons. These directories are searched to find\n\
3117 fully linked executable files and separately compiled object files as \
3120 set_cmd_completer (c
, noop_completer
);
3122 add_prefix_cmd ("kill", class_run
, kill_command
,
3123 _("Kill execution of program being debugged."),
3124 &killlist
, 0, &cmdlist
);
3126 add_com ("attach", class_run
, attach_command
, _("\
3127 Attach to a process or file outside of GDB.\n\
3128 This command attaches to another target, of the same type as your last\n\
3129 \"target\" command (\"info files\" will show your target stack).\n\
3130 The command may take as argument a process id or a device file.\n\
3131 For a process id, you must have permission to send the process a signal,\n\
3132 and it must have the same effective uid as the debugger.\n\
3133 When using \"attach\" with a process id, the debugger finds the\n\
3134 program running in the process, looking first in the current working\n\
3135 directory, or (if not found there) using the source file search path\n\
3136 (see the \"directory\" command). You can also use the \"file\" command\n\
3137 to specify the program, and to load its symbol table."));
3139 add_prefix_cmd ("detach", class_run
, detach_command
, _("\
3140 Detach a process or file previously attached.\n\
3141 If a process, it is no longer traced, and it continues its execution. If\n\
3142 you were debugging a file, the file is closed and gdb no longer accesses it."),
3143 &detachlist
, 0, &cmdlist
);
3145 add_com ("disconnect", class_run
, disconnect_command
, _("\
3146 Disconnect from a target.\n\
3147 The target will wait for another debugger to connect. Not available for\n\
3150 c
= add_com ("signal", class_run
, signal_command
, _("\
3151 Continue program with the specified signal.\n\
3152 Usage: signal SIGNAL\n\
3153 The SIGNAL argument is processed the same as the handle command.\n\
3155 An argument of \"0\" means continue the program without sending it a signal.\n\
3156 This is useful in cases where the program stopped because of a signal,\n\
3157 and you want to resume the program while discarding the signal.\n\
3159 In a multi-threaded program the signal is delivered to, or discarded from,\n\
3160 the current thread only."));
3161 set_cmd_completer (c
, signal_completer
);
3163 c
= add_com ("queue-signal", class_run
, queue_signal_command
, _("\
3164 Queue a signal to be delivered to the current thread when it is resumed.\n\
3165 Usage: queue-signal SIGNAL\n\
3166 The SIGNAL argument is processed the same as the handle command.\n\
3167 It is an error if the handling state of SIGNAL is \"nopass\".\n\
3169 An argument of \"0\" means remove any currently queued signal from\n\
3170 the current thread. This is useful in cases where the program stopped\n\
3171 because of a signal, and you want to resume it while discarding the signal.\n\
3173 In a multi-threaded program the signal is queued with, or discarded from,\n\
3174 the current thread only."));
3175 set_cmd_completer (c
, signal_completer
);
3177 cmd_list_element
*stepi_cmd
3178 = add_com ("stepi", class_run
, stepi_command
, _("\
3179 Step one instruction exactly.\n\
3181 Argument N means step N times (or till program stops for another \
3183 add_com_alias ("si", stepi_cmd
, class_run
, 0);
3185 cmd_list_element
*nexti_cmd
3186 = add_com ("nexti", class_run
, nexti_command
, _("\
3187 Step one instruction, but proceed through subroutine calls.\n\
3189 Argument N means step N times (or till program stops for another \
3191 add_com_alias ("ni", nexti_cmd
, class_run
, 0);
3193 cmd_list_element
*finish_cmd
3194 = add_com ("finish", class_run
, finish_command
, _("\
3195 Execute until selected stack frame returns.\n\
3197 Upon return, the value returned is printed and put in the value history."));
3198 add_com_alias ("fin", finish_cmd
, class_run
, 1);
3200 cmd_list_element
*next_cmd
3201 = add_com ("next", class_run
, next_command
, _("\
3202 Step program, proceeding through subroutine calls.\n\
3204 Unlike \"step\", if the current source line calls a subroutine,\n\
3205 this command does not enter the subroutine, but instead steps over\n\
3206 the call, in effect treating it as a single source line."));
3207 add_com_alias ("n", next_cmd
, class_run
, 1);
3209 cmd_list_element
*step_cmd
3210 = add_com ("step", class_run
, step_command
, _("\
3211 Step program until it reaches a different source line.\n\
3213 Argument N means step N times (or till program stops for another \
3215 add_com_alias ("s", step_cmd
, class_run
, 1);
3217 cmd_list_element
*until_cmd
3218 = add_com ("until", class_run
, until_command
, _("\
3219 Execute until past the current line or past a LOCATION.\n\
3220 Execute until the program reaches a source line greater than the current\n\
3221 or a specified location (same args as break command) within the current \
3223 set_cmd_completer (until_cmd
, location_completer
);
3224 add_com_alias ("u", until_cmd
, class_run
, 1);
3226 c
= add_com ("advance", class_run
, advance_command
, _("\
3227 Continue the program up to the given location (same form as args for break \
3229 Execution will also stop upon exit from the current stack frame."));
3230 set_cmd_completer (c
, location_completer
);
3232 cmd_list_element
*jump_cmd
3233 = add_com ("jump", class_run
, jump_command
, _("\
3234 Continue program being debugged at specified line or address.\n\
3235 Usage: jump LOCATION\n\
3236 Give as argument either LINENUM or *ADDR, where ADDR is an expression\n\
3237 for an address to start at."));
3238 set_cmd_completer (jump_cmd
, location_completer
);
3239 add_com_alias ("j", jump_cmd
, class_run
, 1);
3241 cmd_list_element
*continue_cmd
3242 = add_com ("continue", class_run
, continue_command
, _("\
3243 Continue program being debugged, after signal or breakpoint.\n\
3244 Usage: continue [N]\n\
3245 If proceeding from breakpoint, a number N may be used as an argument,\n\
3246 which means to set the ignore count of that breakpoint to N - 1 (so that\n\
3247 the breakpoint won't break until the Nth time it is reached).\n\
3249 If non-stop mode is enabled, continue only the current thread,\n\
3250 otherwise all the threads in the program are continued. To \n\
3251 continue all stopped threads in non-stop mode, use the -a option.\n\
3252 Specifying -a and an ignore count simultaneously is an error."));
3253 add_com_alias ("c", continue_cmd
, class_run
, 1);
3254 add_com_alias ("fg", continue_cmd
, class_run
, 1);
3256 cmd_list_element
*run_cmd
3257 = add_com ("run", class_run
, run_command
, _("\
3258 Start debugged program.\n"
3260 set_cmd_completer (run_cmd
, filename_completer
);
3261 add_com_alias ("r", run_cmd
, class_run
, 1);
3263 c
= add_com ("start", class_run
, start_command
, _("\
3264 Start the debugged program stopping at the beginning of the main procedure.\n"
3266 set_cmd_completer (c
, filename_completer
);
3268 c
= add_com ("starti", class_run
, starti_command
, _("\
3269 Start the debugged program stopping at the first instruction.\n"
3271 set_cmd_completer (c
, filename_completer
);
3273 add_com ("interrupt", class_run
, interrupt_command
,
3274 _("Interrupt the execution of the debugged program.\n\
3275 If non-stop mode is enabled, interrupt only the current thread,\n\
3276 otherwise all the threads in the program are stopped. To \n\
3277 interrupt all running threads in non-stop mode, use the -a option."));
3279 c
= add_info ("registers", info_registers_command
, _("\
3280 List of integer registers and their contents, for selected stack frame.\n\
3281 One or more register names as argument means describe the given registers.\n\
3282 One or more register group names as argument means describe the registers\n\
3283 in the named register groups."));
3284 add_info_alias ("r", "registers", 1);
3285 set_cmd_completer (c
, reg_or_group_completer
);
3287 c
= add_info ("all-registers", info_all_registers_command
, _("\
3288 List of all registers and their contents, for selected stack frame.\n\
3289 One or more register names as argument means describe the given registers.\n\
3290 One or more register group names as argument means describe the registers\n\
3291 in the named register groups."));
3292 set_cmd_completer (c
, reg_or_group_completer
);
3294 add_info ("program", info_program_command
,
3295 _("Execution status of the program."));
3297 add_info ("float", info_float_command
,
3298 _("Print the status of the floating point unit."));
3300 add_info ("vector", info_vector_command
,
3301 _("Print the status of the vector unit."));
3303 add_prefix_cmd ("proc", class_info
, info_proc_cmd
,
3305 Show additional information about a process.\n\
3306 Specify any process id, or use the program being debugged by default."),
3308 1/*allow-unknown*/, &infolist
);
3310 add_cmd ("mappings", class_info
, info_proc_cmd_mappings
, _("\
3311 List memory regions mapped by the specified process."),
3312 &info_proc_cmdlist
);
3314 add_cmd ("stat", class_info
, info_proc_cmd_stat
, _("\
3315 List process info from /proc/PID/stat."),
3316 &info_proc_cmdlist
);
3318 add_cmd ("status", class_info
, info_proc_cmd_status
, _("\
3319 List process info from /proc/PID/status."),
3320 &info_proc_cmdlist
);
3322 add_cmd ("cwd", class_info
, info_proc_cmd_cwd
, _("\
3323 List current working directory of the specified process."),
3324 &info_proc_cmdlist
);
3326 add_cmd ("cmdline", class_info
, info_proc_cmd_cmdline
, _("\
3327 List command line arguments of the specified process."),
3328 &info_proc_cmdlist
);
3330 add_cmd ("exe", class_info
, info_proc_cmd_exe
, _("\
3331 List absolute filename for executable of the specified process."),
3332 &info_proc_cmdlist
);
3334 add_cmd ("files", class_info
, info_proc_cmd_files
, _("\
3335 List files opened by the specified process."),
3336 &info_proc_cmdlist
);
3338 add_cmd ("all", class_info
, info_proc_cmd_all
, _("\
3339 List all available info about the specified process."),
3340 &info_proc_cmdlist
);
3342 add_setshow_boolean_cmd ("finish", class_support
,
3343 &user_print_options
.finish_print
, _("\
3344 Set whether `finish' prints the return value."), _("\
3345 Show whether `finish' prints the return value."), NULL
,
3348 &setprintlist
, &showprintlist
);