1 /* Memory-access and commands for "inferior" process, for GDB.
3 Copyright (C) 1986-2015 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"
36 #include "completer.h"
38 #include "event-top.h"
39 #include "parser-defs.h"
41 #include "reggroups.h"
46 #include "target-descriptions.h"
47 #include "user-regs.h"
48 #include "cli/cli-decode.h"
49 #include "gdbthread.h"
51 #include "inline-frame.h"
52 #include "tracepoint.h"
54 #include "continuations.h"
56 #include "cli/cli-utils.h"
58 /* Local functions: */
60 static void nofp_registers_info (char *, int);
62 static void print_return_value (struct value
*function
,
63 struct type
*value_type
);
65 static void until_next_command (int);
67 static void until_command (char *, int);
69 static void path_info (char *, int);
71 static void path_command (char *, int);
73 static void unset_command (char *, int);
75 static void float_info (char *, int);
77 static void disconnect_command (char *, int);
79 static void unset_environment_command (char *, int);
81 static void set_environment_command (char *, int);
83 static void environment_info (char *, int);
85 static void program_info (char *, int);
87 static void finish_command (char *, int);
89 static void signal_command (char *, int);
91 static void jump_command (char *, int);
93 static void step_1 (int, int, char *);
94 static void step_once (int skip_subroutines
, int single_inst
,
95 int count
, int thread
);
97 static void next_command (char *, int);
99 static void step_command (char *, int);
101 static void run_command (char *, int);
103 static void run_no_args_command (char *args
, int from_tty
);
105 static void go_command (char *line_no
, int from_tty
);
107 void _initialize_infcmd (void);
109 #define ERROR_NO_INFERIOR \
110 if (!target_has_execution) error (_("The program is not being run."));
112 /* Scratch area where string containing arguments to give to the
113 program will be stored by 'set args'. As soon as anything is
114 stored, notice_args_set will move it into per-inferior storage.
115 Arguments are separated by spaces. Empty string (pointer to '\0')
118 static char *inferior_args_scratch
;
120 /* Scratch area where 'set inferior-tty' will store user-provided value.
121 We'll immediate copy it into per-inferior storage. */
123 static char *inferior_io_terminal_scratch
;
125 /* Pid of our debugged inferior, or 0 if no inferior now.
126 Since various parts of infrun.c test this to see whether there is a program
127 being debugged it should be nonzero (currently 3 is used) for remote
130 ptid_t inferior_ptid
;
132 /* Address at which inferior stopped. */
136 /* Nonzero if stopped due to completion of a stack dummy routine. */
138 enum stop_stack_kind stop_stack_dummy
;
140 /* Nonzero if stopped due to a random (unexpected) signal in inferior
143 int stopped_by_random_signal
;
145 /* See inferior.h. */
147 int startup_with_shell
= 1;
150 /* Accessor routines. */
152 /* Set the io terminal for the current inferior. Ownership of
153 TERMINAL_NAME is not transferred. */
156 set_inferior_io_terminal (const char *terminal_name
)
158 xfree (current_inferior ()->terminal
);
159 current_inferior ()->terminal
= terminal_name
? xstrdup (terminal_name
) : 0;
163 get_inferior_io_terminal (void)
165 return current_inferior ()->terminal
;
169 set_inferior_tty_command (char *args
, int from_tty
,
170 struct cmd_list_element
*c
)
172 /* CLI has assigned the user-provided value to inferior_io_terminal_scratch.
173 Now route it to current inferior. */
174 set_inferior_io_terminal (inferior_io_terminal_scratch
);
178 show_inferior_tty_command (struct ui_file
*file
, int from_tty
,
179 struct cmd_list_element
*c
, const char *value
)
181 /* Note that we ignore the passed-in value in favor of computing it
183 const char *inferior_io_terminal
= get_inferior_io_terminal ();
185 if (inferior_io_terminal
== NULL
)
186 inferior_io_terminal
= "";
187 fprintf_filtered (gdb_stdout
,
188 _("Terminal for future runs of program being debugged "
189 "is \"%s\".\n"), inferior_io_terminal
);
193 get_inferior_args (void)
195 if (current_inferior ()->argc
!= 0)
199 n
= construct_inferior_arguments (current_inferior ()->argc
,
200 current_inferior ()->argv
);
201 set_inferior_args (n
);
205 if (current_inferior ()->args
== NULL
)
206 current_inferior ()->args
= xstrdup ("");
208 return current_inferior ()->args
;
211 /* Set the arguments for the current inferior. Ownership of
212 NEWARGS is not transferred. */
215 set_inferior_args (char *newargs
)
217 xfree (current_inferior ()->args
);
218 current_inferior ()->args
= newargs
? xstrdup (newargs
) : NULL
;
219 current_inferior ()->argc
= 0;
220 current_inferior ()->argv
= 0;
224 set_inferior_args_vector (int argc
, char **argv
)
226 current_inferior ()->argc
= argc
;
227 current_inferior ()->argv
= argv
;
230 /* Notice when `set args' is run. */
233 set_args_command (char *args
, int from_tty
, struct cmd_list_element
*c
)
235 /* CLI has assigned the user-provided value to inferior_args_scratch.
236 Now route it to current inferior. */
237 set_inferior_args (inferior_args_scratch
);
240 /* Notice when `show args' is run. */
243 show_args_command (struct ui_file
*file
, int from_tty
,
244 struct cmd_list_element
*c
, const char *value
)
246 /* Note that we ignore the passed-in value in favor of computing it
248 deprecated_show_value_hack (file
, from_tty
, c
, get_inferior_args ());
252 /* Compute command-line string given argument vector. This does the
253 same shell processing as fork_inferior. */
256 construct_inferior_arguments (int argc
, char **argv
)
260 if (startup_with_shell
)
263 /* This holds all the characters considered special to the
265 char *special
= "\"!&*|[]{}<>?`~^=;, \t\n";
266 const char quote
= '"';
268 /* This holds all the characters considered special to the
269 typical Unix shells. We include `^' because the SunOS
270 /bin/sh treats it as a synonym for `|'. */
271 char *special
= "\"!#$&*()\\|[]{}<>?'`~^; \t\n";
272 const char quote
= '\'';
278 /* We over-compute the size. It shouldn't matter. */
279 for (i
= 0; i
< argc
; ++i
)
280 length
+= 3 * strlen (argv
[i
]) + 1 + 2 * (argv
[i
][0] == '\0');
282 result
= (char *) xmalloc (length
);
285 for (i
= 0; i
< argc
; ++i
)
290 /* Need to handle empty arguments specially. */
291 if (argv
[i
][0] == '\0')
301 if (strpbrk (argv
[i
], special
))
307 for (cp
= argv
[i
]; *cp
; ++cp
)
311 /* A newline cannot be quoted with a backslash (it
312 just disappears), only by putting it inside
323 if (strchr (special
, *cp
) != NULL
)
339 /* In this case we can't handle arguments that contain spaces,
340 tabs, or newlines -- see breakup_args(). */
344 for (i
= 0; i
< argc
; ++i
)
346 char *cp
= strchr (argv
[i
], ' ');
348 cp
= strchr (argv
[i
], '\t');
350 cp
= strchr (argv
[i
], '\n');
352 error (_("can't handle command-line "
353 "argument containing whitespace"));
354 length
+= strlen (argv
[i
]) + 1;
357 result
= (char *) xmalloc (length
);
359 for (i
= 0; i
< argc
; ++i
)
362 strcat (result
, " ");
363 strcat (result
, argv
[i
]);
371 /* This function strips the '&' character (indicating background
372 execution) that is added as *the last* of the arguments ARGS of a
373 command. A copy of the incoming ARGS without the '&' is returned,
374 unless the resulting string after stripping is empty, in which case
375 NULL is returned. *BG_CHAR_P is an output boolean that indicates
376 whether the '&' character was found. */
379 strip_bg_char (const char *args
, int *bg_char_p
)
383 if (args
== NULL
|| *args
== '\0')
389 p
= args
+ strlen (args
);
393 while (p
> args
&& isspace (p
[-1]))
398 return savestring (args
, p
- args
);
404 return xstrdup (args
);
407 /* Common actions to take after creating any sort of inferior, by any
408 means (running, attaching, connecting, et cetera). The target
409 should be stopped. */
412 post_create_inferior (struct target_ops
*target
, int from_tty
)
415 /* Be sure we own the terminal in case write operations are performed. */
416 target_terminal_ours ();
418 /* If the target hasn't taken care of this already, do it now.
419 Targets which need to access registers during to_open,
420 to_create_inferior, or to_attach should do it earlier; but many
422 target_find_description ();
424 /* Now that we know the register layout, retrieve current PC. But
425 if the PC is unavailable (e.g., we're opening a core file with
426 missing registers info), ignore it. */
430 stop_pc
= regcache_read_pc (get_current_regcache ());
432 CATCH (ex
, RETURN_MASK_ERROR
)
434 if (ex
.error
!= NOT_AVAILABLE_ERROR
)
435 throw_exception (ex
);
441 const unsigned solib_add_generation
442 = current_program_space
->solib_add_generation
;
444 /* Create the hooks to handle shared library load and unload
446 solib_create_inferior_hook (from_tty
);
448 if (current_program_space
->solib_add_generation
== solib_add_generation
)
450 /* The platform-specific hook should load initial shared libraries,
451 but didn't. FROM_TTY will be incorrectly 0 but such solib
452 targets should be fixed anyway. Call it only after the solib
453 target has been initialized by solib_create_inferior_hook. */
456 warning (_("platform-specific solib_create_inferior_hook did "
457 "not load initial shared libraries."));
459 /* If the solist is global across processes, there's no need to
461 if (!gdbarch_has_global_solist (target_gdbarch ()))
462 solib_add (NULL
, 0, target
, auto_solib_add
);
466 /* If the user sets watchpoints before execution having started,
467 then she gets software watchpoints, because GDB can't know which
468 target will end up being pushed, or if it supports hardware
469 watchpoints or not. breakpoint_re_set takes care of promoting
470 watchpoints to hardware watchpoints if possible, however, if this
471 new inferior doesn't load shared libraries or we don't pull in
472 symbols from any other source on this target/arch,
473 breakpoint_re_set is never called. Call it now so that software
474 watchpoints get a chance to be promoted to hardware watchpoints
475 if the now pushed target supports hardware watchpoints. */
476 breakpoint_re_set ();
478 observer_notify_inferior_created (target
, from_tty
);
481 /* Kill the inferior if already running. This function is designed
482 to be called when we are about to start the execution of the program
483 from the beginning. Ask the user to confirm that he wants to restart
484 the program being debugged when FROM_TTY is non-null. */
487 kill_if_already_running (int from_tty
)
489 if (! ptid_equal (inferior_ptid
, null_ptid
) && target_has_execution
)
491 /* Bail out before killing the program if we will not be able to
493 target_require_runnable ();
496 && !query (_("The program being debugged has been started already.\n\
497 Start it from the beginning? ")))
498 error (_("Program not restarted."));
503 /* See inferior.h. */
506 prepare_execution_command (struct target_ops
*target
, int background
)
508 /* If we get a request for running in the bg but the target
509 doesn't support it, error out. */
510 if (background
&& !target
->to_can_async_p (target
))
511 error (_("Asynchronous execution not supported on this target."));
513 /* If we don't get a request of running in the bg, then we need
514 to simulate synchronous (fg) execution. */
515 if (!background
&& target
->to_can_async_p (target
))
517 /* Simulate synchronous execution. Note no cleanup is necessary
518 for this. stdin is re-enabled whenever an error reaches the
520 async_disable_stdin ();
524 /* Implement the "run" command. If TBREAK_AT_MAIN is set, then insert
525 a temporary breakpoint at the begining of the main program before
526 running the program. */
529 run_command_1 (char *args
, int from_tty
, int tbreak_at_main
)
532 struct cleanup
*old_chain
;
534 struct ui_out
*uiout
= current_uiout
;
535 struct target_ops
*run_target
;
537 struct cleanup
*args_chain
;
541 kill_if_already_running (from_tty
);
543 init_wait_for_inferior ();
544 clear_breakpoint_hit_counts ();
546 /* Clean up any leftovers from other runs. Some other things from
547 this function should probably be moved into target_pre_inferior. */
548 target_pre_inferior (from_tty
);
550 /* The comment here used to read, "The exec file is re-read every
551 time we do a generic_mourn_inferior, so we just have to worry
552 about the symbol file." The `generic_mourn_inferior' function
553 gets called whenever the program exits. However, suppose the
554 program exits, and *then* the executable file changes? We need
555 to check again here. Since reopen_exec_file doesn't do anything
556 if the timestamp hasn't changed, I don't see the harm. */
560 args
= strip_bg_char (args
, &async_exec
);
561 args_chain
= make_cleanup (xfree
, args
);
563 /* Do validation and preparation before possibly changing anything
566 run_target
= find_run_target ();
568 prepare_execution_command (run_target
, async_exec
);
570 if (non_stop
&& !run_target
->to_supports_non_stop (run_target
))
571 error (_("The target does not support running in non-stop mode."));
573 /* Done. Can now set breakpoints, change inferior args, etc. */
575 /* Insert the temporary breakpoint if a location was specified. */
577 tbreak_command (main_name (), 0);
579 exec_file
= (char *) get_exec_file (0);
581 /* We keep symbols from add-symbol-file, on the grounds that the
582 user might want to add some symbols before running the program
583 (right?). But sometimes (dynamic loading where the user manually
584 introduces the new symbols with add-symbol-file), the code which
585 the symbols describe does not persist between runs. Currently
586 the user has to manually nuke all symbols between runs if they
587 want them to go away (PR 2207). This is probably reasonable. */
589 /* If there were other args, beside '&', process them. */
591 set_inferior_args (args
);
595 ui_out_field_string (uiout
, NULL
, "Starting program");
596 ui_out_text (uiout
, ": ");
598 ui_out_field_string (uiout
, "execfile", exec_file
);
599 ui_out_spaces (uiout
, 1);
600 /* We call get_inferior_args() because we might need to compute
602 ui_out_field_string (uiout
, "infargs", get_inferior_args ());
603 ui_out_text (uiout
, "\n");
604 ui_out_flush (uiout
);
607 /* Done with ARGS. */
608 do_cleanups (args_chain
);
610 /* We call get_inferior_args() because we might need to compute
612 run_target
->to_create_inferior (run_target
, exec_file
, get_inferior_args (),
613 environ_vector (current_inferior ()->environment
),
615 /* to_create_inferior should push the target, so after this point we
616 shouldn't refer to run_target again. */
619 /* We're starting off a new process. When we get out of here, in
620 non-stop mode, finish the state of all threads of that process,
621 but leave other threads alone, as they may be stopped in internal
622 events --- the frontend shouldn't see them as stopped. In
623 all-stop, always finish the state of all threads, as we may be
624 resuming more than just the new process. */
626 ptid
= pid_to_ptid (ptid_get_pid (inferior_ptid
));
628 ptid
= minus_one_ptid
;
629 old_chain
= make_cleanup (finish_thread_state_cleanup
, &ptid
);
631 /* Pass zero for FROM_TTY, because at this point the "run" command
632 has done its thing; now we are setting up the running program. */
633 post_create_inferior (¤t_target
, 0);
635 /* Start the target running. Do not use -1 continuation as it would skip
636 breakpoint right at the entry point. */
637 proceed (regcache_read_pc (get_current_regcache ()), GDB_SIGNAL_0
);
639 /* Since there was no error, there's no need to finish the thread
641 discard_cleanups (old_chain
);
645 run_command (char *args
, int from_tty
)
647 run_command_1 (args
, from_tty
, 0);
651 run_no_args_command (char *args
, int from_tty
)
653 set_inferior_args ("");
657 /* Start the execution of the program up until the beginning of the main
661 start_command (char *args
, int from_tty
)
663 /* Some languages such as Ada need to search inside the program
664 minimal symbols for the location where to put the temporary
665 breakpoint before starting. */
666 if (!have_minimal_symbols ())
667 error (_("No symbol table loaded. Use the \"file\" command."));
669 /* Run the program until reaching the main procedure... */
670 run_command_1 (args
, from_tty
, 1);
674 proceed_thread_callback (struct thread_info
*thread
, void *arg
)
676 /* We go through all threads individually instead of compressing
677 into a single target `resume_all' request, because some threads
678 may be stopped in internal breakpoints/events, or stopped waiting
679 for its turn in the displaced stepping queue (that is, they are
680 running && !executing). The target side has no idea about why
681 the thread is stopped, so a `resume_all' command would resume too
682 much. If/when GDB gains a way to tell the target `hold this
683 thread stopped until I say otherwise', then we can optimize
685 if (!is_stopped (thread
->ptid
))
688 switch_to_thread (thread
->ptid
);
689 clear_proceed_status (0);
690 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
695 ensure_valid_thread (void)
697 if (ptid_equal (inferior_ptid
, null_ptid
)
698 || is_exited (inferior_ptid
))
699 error (_("Cannot execute this command without a live selected thread."));
702 /* If the user is looking at trace frames, any resumption of execution
703 is likely to mix up recorded and live target data. So simply
704 disallow those commands. */
707 ensure_not_tfind_mode (void)
709 if (get_traceframe_number () >= 0)
710 error (_("Cannot execute this command while looking at trace frames."));
713 /* Throw an error indicating the current thread is running. */
716 error_is_running (void)
718 error (_("Cannot execute this command while "
719 "the selected thread is running."));
722 /* Calls error_is_running if the current thread is running. */
725 ensure_not_running (void)
727 if (is_running (inferior_ptid
))
732 continue_1 (int all_threads
)
735 ensure_not_tfind_mode ();
737 if (non_stop
&& all_threads
)
739 /* Don't error out if the current thread is running, because
740 there may be other stopped threads. */
741 struct cleanup
*old_chain
;
743 /* Backup current thread and selected frame. */
744 old_chain
= make_cleanup_restore_current_thread ();
746 iterate_over_threads (proceed_thread_callback
, NULL
);
750 /* If all threads in the target were already running,
751 proceed_thread_callback ends up never calling proceed,
752 and so nothing calls this to put the inferior's terminal
753 settings in effect and remove stdin from the event loop,
754 which we must when running a foreground command. E.g.:
758 <all threads are running now>
761 <no thread was resumed, but the inferior now owns the terminal>
763 target_terminal_inferior ();
766 /* Restore selected ptid. */
767 do_cleanups (old_chain
);
771 ensure_valid_thread ();
772 ensure_not_running ();
773 clear_proceed_status (0);
774 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
778 /* continue [-a] [proceed-count] [&] */
781 continue_command (char *args
, int from_tty
)
785 struct cleanup
*args_chain
;
789 /* Find out whether we must run in the background. */
790 args
= strip_bg_char (args
, &async_exec
);
791 args_chain
= make_cleanup (xfree
, args
);
793 prepare_execution_command (¤t_target
, async_exec
);
797 if (startswith (args
, "-a"))
800 args
+= sizeof ("-a") - 1;
806 if (!non_stop
&& all_threads
)
807 error (_("`-a' is meaningless in all-stop mode."));
809 if (args
!= NULL
&& all_threads
)
810 error (_("Can't resume all threads and specify "
811 "proceed count simultaneously."));
813 /* If we have an argument left, set proceed count of breakpoint we
820 struct thread_info
*tp
;
823 tp
= find_thread_ptid (inferior_ptid
);
827 struct target_waitstatus ws
;
829 get_last_target_status (&last_ptid
, &ws
);
830 tp
= find_thread_ptid (last_ptid
);
833 bs
= tp
->control
.stop_bpstat
;
835 while ((stat
= bpstat_num (&bs
, &num
)) != 0)
838 set_ignore_count (num
,
839 parse_and_eval_long (args
) - 1,
841 /* set_ignore_count prints a message ending with a period.
842 So print two spaces before "Continuing.". */
844 printf_filtered (" ");
848 if (!stopped
&& from_tty
)
851 ("Not stopped at any breakpoint; argument ignored.\n");
855 /* Done with ARGS. */
856 do_cleanups (args_chain
);
859 printf_filtered (_("Continuing.\n"));
861 continue_1 (all_threads
);
864 /* Record the starting point of a "step" or "next" command. */
867 set_step_frame (void)
869 struct symtab_and_line sal
;
871 struct frame_info
*frame
= get_current_frame ();
872 struct thread_info
*tp
= inferior_thread ();
874 find_frame_sal (frame
, &sal
);
875 set_step_info (frame
, sal
);
876 pc
= get_frame_pc (frame
);
877 tp
->control
.step_start_function
= find_pc_function (pc
);
880 /* Step until outside of current statement. */
883 step_command (char *count_string
, int from_tty
)
885 step_1 (0, 0, count_string
);
888 /* Likewise, but skip over subroutine calls as if single instructions. */
891 next_command (char *count_string
, int from_tty
)
893 step_1 (1, 0, count_string
);
896 /* Likewise, but step only one instruction. */
899 stepi_command (char *count_string
, int from_tty
)
901 step_1 (0, 1, count_string
);
905 nexti_command (char *count_string
, int from_tty
)
907 step_1 (1, 1, count_string
);
911 delete_longjmp_breakpoint_cleanup (void *arg
)
913 int thread
= * (int *) arg
;
914 delete_longjmp_breakpoint (thread
);
918 step_1 (int skip_subroutines
, int single_inst
, char *count_string
)
921 struct cleanup
*cleanups
= make_cleanup (null_cleanup
, NULL
);
924 struct cleanup
*args_chain
;
927 ensure_not_tfind_mode ();
928 ensure_valid_thread ();
929 ensure_not_running ();
931 count_string
= strip_bg_char (count_string
, &async_exec
);
932 args_chain
= make_cleanup (xfree
, count_string
);
934 prepare_execution_command (¤t_target
, async_exec
);
936 count
= count_string
? parse_and_eval_long (count_string
) : 1;
938 /* Done with ARGS. */
939 do_cleanups (args_chain
);
941 if (!single_inst
|| skip_subroutines
) /* Leave si command alone. */
943 struct thread_info
*tp
= inferior_thread ();
945 if (in_thread_list (inferior_ptid
))
946 thread
= pid_to_thread_id (inferior_ptid
);
948 set_longjmp_breakpoint (tp
, get_frame_id (get_current_frame ()));
950 make_cleanup (delete_longjmp_breakpoint_cleanup
, &thread
);
953 /* In synchronous case, all is well; each step_once call will step once. */
954 if (!target_can_async_p ())
956 for (; count
> 0; count
--)
958 step_once (skip_subroutines
, single_inst
, count
, thread
);
960 if (!target_has_execution
)
964 struct thread_info
*tp
= inferior_thread ();
966 if (!tp
->control
.stop_step
|| !tp
->step_multi
)
968 /* If we stopped for some reason that is not stepping
969 there are no further steps to make. */
976 do_cleanups (cleanups
);
980 /* In the case of an asynchronous target things get complicated;
981 do only one step for now, before returning control to the
982 event loop. Let the continuation figure out how many other
983 steps we need to do, and handle them one at the time, through
985 step_once (skip_subroutines
, single_inst
, count
, thread
);
987 /* We are running, and the continuation is installed. It will
988 disable the longjmp breakpoint as appropriate. */
989 discard_cleanups (cleanups
);
993 struct step_1_continuation_args
996 int skip_subroutines
;
1001 /* Called after we are done with one step operation, to check whether
1002 we need to step again, before we print the prompt and return control
1003 to the user. If count is > 1, we will need to do one more call to
1004 proceed(), via step_once(). Basically it is like step_once and
1005 step_1_continuation are co-recursive. */
1008 step_1_continuation (void *args
, int err
)
1010 struct step_1_continuation_args
*a
= args
;
1012 if (target_has_execution
)
1014 struct thread_info
*tp
;
1016 tp
= inferior_thread ();
1018 && tp
->step_multi
&& tp
->control
.stop_step
)
1020 /* There are more steps to make, and we did stop due to
1021 ending a stepping range. Do another step. */
1022 step_once (a
->skip_subroutines
, a
->single_inst
,
1023 a
->count
- 1, a
->thread
);
1029 /* We either hit an error, or stopped for some reason that is
1030 not stepping, or there are no further steps to make.
1032 if (!a
->single_inst
|| a
->skip_subroutines
)
1033 delete_longjmp_breakpoint (a
->thread
);
1036 /* Do just one step operation. This is useful to implement the 'step
1037 n' kind of commands. In case of asynchronous targets, we will have
1038 to set up a continuation to be done after the target stops (after
1039 this one step). For synch targets, the caller handles further
1043 step_once (int skip_subroutines
, int single_inst
, int count
, int thread
)
1045 struct frame_info
*frame
= get_current_frame ();
1049 /* Don't assume THREAD is a valid thread id. It is set to -1 if
1050 the longjmp breakpoint was not required. Use the
1051 INFERIOR_PTID thread instead, which is the same thread when
1053 struct thread_info
*tp
= inferior_thread ();
1055 clear_proceed_status (1);
1062 /* Step at an inlined function behaves like "down". */
1063 if (!skip_subroutines
1064 && inline_skipped_frames (inferior_ptid
))
1068 /* Pretend that we've ran. */
1069 resume_ptid
= user_visible_resume_ptid (1);
1070 set_running (resume_ptid
, 1);
1072 step_into_inline_frame (inferior_ptid
);
1074 step_once (skip_subroutines
, single_inst
, count
- 1, thread
);
1077 /* Pretend that we've stopped. */
1080 if (target_can_async_p ())
1081 inferior_event_handler (INF_EXEC_COMPLETE
, NULL
);
1086 pc
= get_frame_pc (frame
);
1087 find_pc_line_pc_range (pc
,
1088 &tp
->control
.step_range_start
,
1089 &tp
->control
.step_range_end
);
1091 tp
->control
.may_range_step
= 1;
1093 /* If we have no line info, switch to stepi mode. */
1094 if (tp
->control
.step_range_end
== 0 && step_stop_if_no_debug
)
1096 tp
->control
.step_range_start
= tp
->control
.step_range_end
= 1;
1097 tp
->control
.may_range_step
= 0;
1099 else if (tp
->control
.step_range_end
== 0)
1103 if (find_pc_partial_function (pc
, &name
,
1104 &tp
->control
.step_range_start
,
1105 &tp
->control
.step_range_end
) == 0)
1106 error (_("Cannot find bounds of current function"));
1108 target_terminal_ours ();
1109 printf_filtered (_("Single stepping until exit from function %s,"
1110 "\nwhich has no line number information.\n"),
1116 /* Say we are stepping, but stop after one insn whatever it does. */
1117 tp
->control
.step_range_start
= tp
->control
.step_range_end
= 1;
1118 if (!skip_subroutines
)
1120 Don't step over function calls, not even to functions lacking
1122 tp
->control
.step_over_calls
= STEP_OVER_NONE
;
1125 if (skip_subroutines
)
1126 tp
->control
.step_over_calls
= STEP_OVER_ALL
;
1128 tp
->step_multi
= (count
> 1);
1129 tp
->control
.stepping_command
= 1;
1130 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
1132 /* For async targets, register a continuation to do any
1133 additional steps. For sync targets, the caller will handle
1134 further stepping. */
1135 if (target_can_async_p ())
1137 struct step_1_continuation_args
*args
;
1139 args
= xmalloc (sizeof (*args
));
1140 args
->skip_subroutines
= skip_subroutines
;
1141 args
->single_inst
= single_inst
;
1142 args
->count
= count
;
1143 args
->thread
= thread
;
1145 add_intermediate_continuation (tp
, step_1_continuation
, args
, xfree
);
1151 /* Continue program at specified address. */
1154 jump_command (char *arg
, int from_tty
)
1156 struct gdbarch
*gdbarch
= get_current_arch ();
1158 struct symtabs_and_lines sals
;
1159 struct symtab_and_line sal
;
1163 struct cleanup
*args_chain
;
1166 ensure_not_tfind_mode ();
1167 ensure_valid_thread ();
1168 ensure_not_running ();
1170 /* Find out whether we must run in the background. */
1171 arg
= strip_bg_char (arg
, &async_exec
);
1172 args_chain
= make_cleanup (xfree
, arg
);
1174 prepare_execution_command (¤t_target
, async_exec
);
1177 error_no_arg (_("starting address"));
1179 sals
= decode_line_with_last_displayed (arg
, DECODE_LINE_FUNFIRSTLINE
);
1180 if (sals
.nelts
!= 1)
1182 error (_("Unreasonable jump request"));
1188 /* Done with ARGS. */
1189 do_cleanups (args_chain
);
1191 if (sal
.symtab
== 0 && sal
.pc
== 0)
1192 error (_("No source file has been specified."));
1194 resolve_sal_pc (&sal
); /* May error out. */
1196 /* See if we are trying to jump to another function. */
1197 fn
= get_frame_function (get_current_frame ());
1198 sfn
= find_pc_function (sal
.pc
);
1199 if (fn
!= NULL
&& sfn
!= fn
)
1201 if (!query (_("Line %d is not in `%s'. Jump anyway? "), sal
.line
,
1202 SYMBOL_PRINT_NAME (fn
)))
1204 error (_("Not confirmed."));
1211 struct obj_section
*section
;
1213 fixup_symbol_section (sfn
, 0);
1214 section
= SYMBOL_OBJ_SECTION (symbol_objfile (sfn
), sfn
);
1215 if (section_is_overlay (section
)
1216 && !section_is_mapped (section
))
1218 if (!query (_("WARNING!!! Destination is in "
1219 "unmapped overlay! Jump anyway? ")))
1221 error (_("Not confirmed."));
1231 printf_filtered (_("Continuing at "));
1232 fputs_filtered (paddress (gdbarch
, addr
), gdb_stdout
);
1233 printf_filtered (".\n");
1236 clear_proceed_status (0);
1237 proceed (addr
, GDB_SIGNAL_0
);
1241 /* Go to line or address in current procedure. */
1244 go_command (char *line_no
, int from_tty
)
1246 if (line_no
== (char *) NULL
|| !*line_no
)
1247 printf_filtered (_("Usage: go <location>\n"));
1250 tbreak_command (line_no
, from_tty
);
1251 jump_command (line_no
, from_tty
);
1256 /* Continue program giving it specified signal. */
1259 signal_command (char *signum_exp
, int from_tty
)
1261 enum gdb_signal oursig
;
1263 struct cleanup
*args_chain
;
1265 dont_repeat (); /* Too dangerous. */
1267 ensure_not_tfind_mode ();
1268 ensure_valid_thread ();
1269 ensure_not_running ();
1271 /* Find out whether we must run in the background. */
1272 signum_exp
= strip_bg_char (signum_exp
, &async_exec
);
1273 args_chain
= make_cleanup (xfree
, signum_exp
);
1275 prepare_execution_command (¤t_target
, async_exec
);
1278 error_no_arg (_("signal number"));
1280 /* It would be even slicker to make signal names be valid expressions,
1281 (the type could be "enum $signal" or some such), then the user could
1282 assign them to convenience variables. */
1283 oursig
= gdb_signal_from_name (signum_exp
);
1285 if (oursig
== GDB_SIGNAL_UNKNOWN
)
1287 /* No, try numeric. */
1288 int num
= parse_and_eval_long (signum_exp
);
1291 oursig
= GDB_SIGNAL_0
;
1293 oursig
= gdb_signal_from_command (num
);
1296 /* Look for threads other than the current that this command ends up
1297 resuming too (due to schedlock off), and warn if they'll get a
1298 signal delivered. "signal 0" is used to suppress a previous
1299 signal, but if the current thread is no longer the one that got
1300 the signal, then the user is potentially suppressing the signal
1301 of the wrong thread. */
1304 struct thread_info
*tp
;
1306 int must_confirm
= 0;
1308 /* This indicates what will be resumed. Either a single thread,
1309 a whole process, or all threads of all processes. */
1310 resume_ptid
= user_visible_resume_ptid (0);
1312 ALL_NON_EXITED_THREADS (tp
)
1314 if (ptid_equal (tp
->ptid
, inferior_ptid
))
1316 if (!ptid_match (tp
->ptid
, resume_ptid
))
1319 if (tp
->suspend
.stop_signal
!= GDB_SIGNAL_0
1320 && signal_pass_state (tp
->suspend
.stop_signal
))
1323 printf_unfiltered (_("Note:\n"));
1324 printf_unfiltered (_(" Thread %d previously stopped with signal %s, %s.\n"),
1326 gdb_signal_to_name (tp
->suspend
.stop_signal
),
1327 gdb_signal_to_string (tp
->suspend
.stop_signal
));
1333 && !query (_("Continuing thread %d (the current thread) with specified signal will\n"
1334 "still deliver the signals noted above to their respective threads.\n"
1335 "Continue anyway? "),
1336 inferior_thread ()->num
))
1337 error (_("Not confirmed."));
1342 if (oursig
== GDB_SIGNAL_0
)
1343 printf_filtered (_("Continuing with no signal.\n"));
1345 printf_filtered (_("Continuing with signal %s.\n"),
1346 gdb_signal_to_name (oursig
));
1349 clear_proceed_status (0);
1350 proceed ((CORE_ADDR
) -1, oursig
);
1353 /* Queue a signal to be delivered to the current thread. */
1356 queue_signal_command (char *signum_exp
, int from_tty
)
1358 enum gdb_signal oursig
;
1359 struct thread_info
*tp
;
1362 ensure_not_tfind_mode ();
1363 ensure_valid_thread ();
1364 ensure_not_running ();
1366 if (signum_exp
== NULL
)
1367 error_no_arg (_("signal number"));
1369 /* It would be even slicker to make signal names be valid expressions,
1370 (the type could be "enum $signal" or some such), then the user could
1371 assign them to convenience variables. */
1372 oursig
= gdb_signal_from_name (signum_exp
);
1374 if (oursig
== GDB_SIGNAL_UNKNOWN
)
1376 /* No, try numeric. */
1377 int num
= parse_and_eval_long (signum_exp
);
1380 oursig
= GDB_SIGNAL_0
;
1382 oursig
= gdb_signal_from_command (num
);
1385 if (oursig
!= GDB_SIGNAL_0
1386 && !signal_pass_state (oursig
))
1387 error (_("Signal handling set to not pass this signal to the program."));
1389 tp
= inferior_thread ();
1390 tp
->suspend
.stop_signal
= oursig
;
1393 /* Continuation args to be passed to the "until" command
1395 struct until_next_continuation_args
1397 /* The thread that was current when the command was executed. */
1401 /* A continuation callback for until_next_command. */
1404 until_next_continuation (void *arg
, int err
)
1406 struct until_next_continuation_args
*a
= arg
;
1408 delete_longjmp_breakpoint (a
->thread
);
1411 /* Proceed until we reach a different source line with pc greater than
1412 our current one or exit the function. We skip calls in both cases.
1414 Note that eventually this command should probably be changed so
1415 that only source lines are printed out when we hit the breakpoint
1416 we set. This may involve changes to wait_for_inferior and the
1417 proceed status code. */
1420 until_next_command (int from_tty
)
1422 struct frame_info
*frame
;
1424 struct symbol
*func
;
1425 struct symtab_and_line sal
;
1426 struct thread_info
*tp
= inferior_thread ();
1427 int thread
= tp
->num
;
1428 struct cleanup
*old_chain
;
1430 clear_proceed_status (0);
1433 frame
= get_current_frame ();
1435 /* Step until either exited from this function or greater
1436 than the current line (if in symbolic section) or pc (if
1439 pc
= get_frame_pc (frame
);
1440 func
= find_pc_function (pc
);
1444 struct bound_minimal_symbol msymbol
= lookup_minimal_symbol_by_pc (pc
);
1446 if (msymbol
.minsym
== NULL
)
1447 error (_("Execution is not within a known function."));
1449 tp
->control
.step_range_start
= BMSYMBOL_VALUE_ADDRESS (msymbol
);
1450 /* The upper-bound of step_range is exclusive. In order to make PC
1451 within the range, set the step_range_end with PC + 1. */
1452 tp
->control
.step_range_end
= pc
+ 1;
1456 sal
= find_pc_line (pc
, 0);
1458 tp
->control
.step_range_start
= BLOCK_START (SYMBOL_BLOCK_VALUE (func
));
1459 tp
->control
.step_range_end
= sal
.end
;
1461 tp
->control
.may_range_step
= 1;
1463 tp
->control
.step_over_calls
= STEP_OVER_ALL
;
1465 tp
->step_multi
= 0; /* Only one call to proceed */
1467 set_longjmp_breakpoint (tp
, get_frame_id (frame
));
1468 old_chain
= make_cleanup (delete_longjmp_breakpoint_cleanup
, &thread
);
1470 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
1472 if (target_can_async_p () && is_running (inferior_ptid
))
1474 struct until_next_continuation_args
*cont_args
;
1476 discard_cleanups (old_chain
);
1477 cont_args
= XNEW (struct until_next_continuation_args
);
1478 cont_args
->thread
= inferior_thread ()->num
;
1480 add_continuation (tp
, until_next_continuation
, cont_args
, xfree
);
1483 do_cleanups (old_chain
);
1487 until_command (char *arg
, int from_tty
)
1490 struct cleanup
*args_chain
;
1493 ensure_not_tfind_mode ();
1494 ensure_valid_thread ();
1495 ensure_not_running ();
1497 /* Find out whether we must run in the background. */
1498 arg
= strip_bg_char (arg
, &async_exec
);
1499 args_chain
= make_cleanup (xfree
, arg
);
1501 prepare_execution_command (¤t_target
, async_exec
);
1504 until_break_command (arg
, from_tty
, 0);
1506 until_next_command (from_tty
);
1508 /* Done with ARGS. */
1509 do_cleanups (args_chain
);
1513 advance_command (char *arg
, int from_tty
)
1516 struct cleanup
*args_chain
;
1519 ensure_not_tfind_mode ();
1520 ensure_valid_thread ();
1521 ensure_not_running ();
1524 error_no_arg (_("a location"));
1526 /* Find out whether we must run in the background. */
1527 arg
= strip_bg_char (arg
, &async_exec
);
1528 args_chain
= make_cleanup (xfree
, arg
);
1530 prepare_execution_command (¤t_target
, async_exec
);
1532 until_break_command (arg
, from_tty
, 1);
1534 /* Done with ARGS. */
1535 do_cleanups (args_chain
);
1538 /* Return the value of the result of a function at the end of a 'finish'
1542 get_return_value (struct value
*function
, struct type
*value_type
)
1544 struct regcache
*stop_regs
= stop_registers
;
1545 struct gdbarch
*gdbarch
;
1546 struct value
*value
;
1547 struct cleanup
*cleanup
= make_cleanup (null_cleanup
, NULL
);
1549 /* If stop_registers were not saved, use the current registers. */
1552 stop_regs
= regcache_dup (get_current_regcache ());
1553 make_cleanup_regcache_xfree (stop_regs
);
1556 gdbarch
= get_regcache_arch (stop_regs
);
1558 CHECK_TYPEDEF (value_type
);
1559 gdb_assert (TYPE_CODE (value_type
) != TYPE_CODE_VOID
);
1561 /* FIXME: 2003-09-27: When returning from a nested inferior function
1562 call, it's possible (with no help from the architecture vector)
1563 to locate and return/print a "struct return" value. This is just
1564 a more complicated case of what is already being done in the
1565 inferior function call code. In fact, when inferior function
1566 calls are made async, this will likely be made the norm. */
1568 switch (gdbarch_return_value (gdbarch
, function
, value_type
,
1571 case RETURN_VALUE_REGISTER_CONVENTION
:
1572 case RETURN_VALUE_ABI_RETURNS_ADDRESS
:
1573 case RETURN_VALUE_ABI_PRESERVES_ADDRESS
:
1574 value
= allocate_value (value_type
);
1575 gdbarch_return_value (gdbarch
, function
, value_type
, stop_regs
,
1576 value_contents_raw (value
), NULL
);
1578 case RETURN_VALUE_STRUCT_CONVENTION
:
1582 internal_error (__FILE__
, __LINE__
, _("bad switch"));
1585 do_cleanups (cleanup
);
1590 /* Print the result of a function at the end of a 'finish' command. */
1593 print_return_value (struct value
*function
, struct type
*value_type
)
1595 struct value
*value
= get_return_value (function
, value_type
);
1596 struct ui_out
*uiout
= current_uiout
;
1600 struct value_print_options opts
;
1601 struct ui_file
*stb
;
1602 struct cleanup
*old_chain
;
1605 stb
= mem_fileopen ();
1606 old_chain
= make_cleanup_ui_file_delete (stb
);
1607 ui_out_text (uiout
, "Value returned is ");
1608 ui_out_field_fmt (uiout
, "gdb-result-var", "$%d",
1609 record_latest_value (value
));
1610 ui_out_text (uiout
, " = ");
1611 get_no_prettyformat_print_options (&opts
);
1612 value_print (value
, stb
, &opts
);
1613 ui_out_field_stream (uiout
, "return-value", stb
);
1614 ui_out_text (uiout
, "\n");
1615 do_cleanups (old_chain
);
1619 struct cleanup
*oldchain
;
1622 type_name
= type_to_string (value_type
);
1623 oldchain
= make_cleanup (xfree
, type_name
);
1624 ui_out_text (uiout
, "Value returned has type: ");
1625 ui_out_field_string (uiout
, "return-type", type_name
);
1626 ui_out_text (uiout
, ".");
1627 ui_out_text (uiout
, " Cannot determine contents\n");
1628 do_cleanups (oldchain
);
1632 /* Stuff that needs to be done by the finish command after the target
1633 has stopped. In asynchronous mode, we wait for the target to stop
1634 in the call to poll or select in the event loop, so it is
1635 impossible to do all the stuff as part of the finish_command
1636 function itself. The only chance we have to complete this command
1637 is in fetch_inferior_event, which is called by the event loop as
1638 soon as it detects that the target has stopped. */
1640 struct finish_command_continuation_args
1642 /* The thread that as current when the command was executed. */
1644 struct breakpoint
*breakpoint
;
1645 struct symbol
*function
;
1649 finish_command_continuation (void *arg
, int err
)
1651 struct finish_command_continuation_args
*a
= arg
;
1655 struct thread_info
*tp
= NULL
;
1658 if (!ptid_equal (inferior_ptid
, null_ptid
)
1659 && target_has_execution
1660 && is_stopped (inferior_ptid
))
1662 tp
= inferior_thread ();
1663 bs
= tp
->control
.stop_bpstat
;
1666 if (bpstat_find_breakpoint (bs
, a
->breakpoint
) != NULL
1667 && a
->function
!= NULL
)
1669 struct type
*value_type
;
1671 value_type
= TYPE_TARGET_TYPE (SYMBOL_TYPE (a
->function
));
1673 internal_error (__FILE__
, __LINE__
,
1674 _("finish_command: function has no target type"));
1676 if (TYPE_CODE (value_type
) != TYPE_CODE_VOID
)
1680 func
= read_var_value (a
->function
, get_current_frame ());
1683 /* print_return_value can throw an exception in some
1684 circumstances. We need to catch this so that we still
1685 delete the breakpoint. */
1686 print_return_value (func
, value_type
);
1688 CATCH (ex
, RETURN_MASK_ALL
)
1690 exception_print (gdb_stdout
, ex
);
1696 /* We suppress normal call of normal_stop observer and do it
1697 here so that the *stopped notification includes the return
1699 if (bs
!= NULL
&& tp
->control
.proceed_to_finish
)
1700 observer_notify_normal_stop (bs
, 1 /* print frame */);
1703 delete_breakpoint (a
->breakpoint
);
1704 delete_longjmp_breakpoint (a
->thread
);
1708 finish_command_continuation_free_arg (void *arg
)
1713 /* finish_backward -- helper function for finish_command. */
1716 finish_backward (struct symbol
*function
)
1718 struct symtab_and_line sal
;
1719 struct thread_info
*tp
= inferior_thread ();
1721 CORE_ADDR func_addr
;
1723 pc
= get_frame_pc (get_current_frame ());
1725 if (find_pc_partial_function (pc
, NULL
, &func_addr
, NULL
) == 0)
1726 error (_("Cannot find bounds of current function"));
1728 sal
= find_pc_line (func_addr
, 0);
1730 tp
->control
.proceed_to_finish
= 1;
1731 /* Special case: if we're sitting at the function entry point,
1732 then all we need to do is take a reverse singlestep. We
1733 don't need to set a breakpoint, and indeed it would do us
1736 Note that this can only happen at frame #0, since there's
1737 no way that a function up the stack can have a return address
1738 that's equal to its entry point. */
1742 struct frame_info
*frame
= get_selected_frame (NULL
);
1743 struct gdbarch
*gdbarch
= get_frame_arch (frame
);
1744 struct symtab_and_line sr_sal
;
1746 /* Set a step-resume at the function's entry point. Once that's
1747 hit, we'll do one more step backwards. */
1750 sr_sal
.pspace
= get_frame_program_space (frame
);
1751 insert_step_resume_breakpoint_at_sal (gdbarch
,
1752 sr_sal
, null_frame_id
);
1754 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
1758 /* We're almost there -- we just need to back up by one more
1760 tp
->control
.step_range_start
= tp
->control
.step_range_end
= 1;
1761 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
1765 /* finish_forward -- helper function for finish_command. */
1768 finish_forward (struct symbol
*function
, struct frame_info
*frame
)
1770 struct frame_id frame_id
= get_frame_id (frame
);
1771 struct gdbarch
*gdbarch
= get_frame_arch (frame
);
1772 struct symtab_and_line sal
;
1773 struct thread_info
*tp
= inferior_thread ();
1774 struct breakpoint
*breakpoint
;
1775 struct cleanup
*old_chain
;
1776 struct finish_command_continuation_args
*cargs
;
1777 int thread
= tp
->num
;
1779 sal
= find_pc_line (get_frame_pc (frame
), 0);
1780 sal
.pc
= get_frame_pc (frame
);
1782 breakpoint
= set_momentary_breakpoint (gdbarch
, sal
,
1783 get_stack_frame_id (frame
),
1786 /* set_momentary_breakpoint invalidates FRAME. */
1789 old_chain
= make_cleanup_delete_breakpoint (breakpoint
);
1791 set_longjmp_breakpoint (tp
, frame_id
);
1792 make_cleanup (delete_longjmp_breakpoint_cleanup
, &thread
);
1794 /* We want stop_registers, please... */
1795 tp
->control
.proceed_to_finish
= 1;
1796 cargs
= xmalloc (sizeof (*cargs
));
1798 cargs
->thread
= thread
;
1799 cargs
->breakpoint
= breakpoint
;
1800 cargs
->function
= function
;
1801 add_continuation (tp
, finish_command_continuation
, cargs
,
1802 finish_command_continuation_free_arg
);
1803 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
1805 discard_cleanups (old_chain
);
1806 if (!target_can_async_p ())
1807 do_all_continuations (0);
1810 /* "finish": Set a temporary breakpoint at the place the selected
1811 frame will return to, then continue. */
1814 finish_command (char *arg
, int from_tty
)
1816 struct frame_info
*frame
;
1817 struct symbol
*function
;
1819 struct cleanup
*args_chain
;
1822 ensure_not_tfind_mode ();
1823 ensure_valid_thread ();
1824 ensure_not_running ();
1826 /* Find out whether we must run in the background. */
1827 arg
= strip_bg_char (arg
, &async_exec
);
1828 args_chain
= make_cleanup (xfree
, arg
);
1830 prepare_execution_command (¤t_target
, async_exec
);
1833 error (_("The \"finish\" command does not take any arguments."));
1835 /* Done with ARGS. */
1836 do_cleanups (args_chain
);
1838 frame
= get_prev_frame (get_selected_frame (_("No selected frame.")));
1840 error (_("\"finish\" not meaningful in the outermost frame."));
1842 clear_proceed_status (0);
1844 /* Finishing from an inline frame is completely different. We don't
1845 try to show the "return value" - no way to locate it. So we do
1846 not need a completion. */
1847 if (get_frame_type (get_selected_frame (_("No selected frame.")))
1850 /* Claim we are stepping in the calling frame. An empty step
1851 range means that we will stop once we aren't in a function
1852 called by that frame. We don't use the magic "1" value for
1853 step_range_end, because then infrun will think this is nexti,
1854 and not step over the rest of this inlined function call. */
1855 struct thread_info
*tp
= inferior_thread ();
1856 struct symtab_and_line empty_sal
;
1858 init_sal (&empty_sal
);
1859 set_step_info (frame
, empty_sal
);
1860 tp
->control
.step_range_start
= get_frame_pc (frame
);
1861 tp
->control
.step_range_end
= tp
->control
.step_range_start
;
1862 tp
->control
.step_over_calls
= STEP_OVER_ALL
;
1864 /* Print info on the selected frame, including level number but not
1868 printf_filtered (_("Run till exit from "));
1869 print_stack_frame (get_selected_frame (NULL
), 1, LOCATION
, 0);
1872 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
1876 /* Ignore TAILCALL_FRAME type frames, they were executed already before
1877 entering THISFRAME. */
1878 while (get_frame_type (frame
) == TAILCALL_FRAME
)
1879 frame
= get_prev_frame (frame
);
1881 /* Find the function we will return from. */
1883 function
= find_pc_function (get_frame_pc (get_selected_frame (NULL
)));
1885 /* Print info on the selected frame, including level number but not
1889 if (execution_direction
== EXEC_REVERSE
)
1890 printf_filtered (_("Run back to call of "));
1893 if (function
!= NULL
&& TYPE_NO_RETURN (function
->type
)
1894 && !query (_("warning: Function %s does not return normally.\n"
1895 "Try to finish anyway? "),
1896 SYMBOL_PRINT_NAME (function
)))
1897 error (_("Not confirmed."));
1898 printf_filtered (_("Run till exit from "));
1901 print_stack_frame (get_selected_frame (NULL
), 1, LOCATION
, 0);
1904 if (execution_direction
== EXEC_REVERSE
)
1905 finish_backward (function
);
1907 finish_forward (function
, frame
);
1912 program_info (char *args
, int from_tty
)
1916 struct thread_info
*tp
;
1919 if (!target_has_execution
)
1921 printf_filtered (_("The program being debugged is not being run.\n"));
1926 ptid
= inferior_ptid
;
1929 struct target_waitstatus ws
;
1931 get_last_target_status (&ptid
, &ws
);
1934 if (ptid_equal (ptid
, null_ptid
) || is_exited (ptid
))
1935 error (_("Invalid selected thread."));
1936 else if (is_running (ptid
))
1937 error (_("Selected thread is running."));
1939 tp
= find_thread_ptid (ptid
);
1940 bs
= tp
->control
.stop_bpstat
;
1941 stat
= bpstat_num (&bs
, &num
);
1943 target_files_info ();
1944 printf_filtered (_("Program stopped at %s.\n"),
1945 paddress (target_gdbarch (), stop_pc
));
1946 if (tp
->control
.stop_step
)
1947 printf_filtered (_("It stopped after being stepped.\n"));
1950 /* There may be several breakpoints in the same place, so this
1951 isn't as strange as it seems. */
1956 printf_filtered (_("It stopped at a breakpoint "
1957 "that has since been deleted.\n"));
1960 printf_filtered (_("It stopped at breakpoint %d.\n"), num
);
1961 stat
= bpstat_num (&bs
, &num
);
1964 else if (tp
->suspend
.stop_signal
!= GDB_SIGNAL_0
)
1966 printf_filtered (_("It stopped with signal %s, %s.\n"),
1967 gdb_signal_to_name (tp
->suspend
.stop_signal
),
1968 gdb_signal_to_string (tp
->suspend
.stop_signal
));
1973 printf_filtered (_("Type \"info stack\" or \"info "
1974 "registers\" for more information.\n"));
1979 environment_info (char *var
, int from_tty
)
1983 char *val
= get_in_environ (current_inferior ()->environment
, var
);
1987 puts_filtered (var
);
1988 puts_filtered (" = ");
1989 puts_filtered (val
);
1990 puts_filtered ("\n");
1994 puts_filtered ("Environment variable \"");
1995 puts_filtered (var
);
1996 puts_filtered ("\" not defined.\n");
2001 char **vector
= environ_vector (current_inferior ()->environment
);
2005 puts_filtered (*vector
++);
2006 puts_filtered ("\n");
2012 set_environment_command (char *arg
, int from_tty
)
2014 char *p
, *val
, *var
;
2018 error_no_arg (_("environment variable and value"));
2020 /* Find seperation between variable name and value. */
2021 p
= (char *) strchr (arg
, '=');
2022 val
= (char *) strchr (arg
, ' ');
2024 if (p
!= 0 && val
!= 0)
2026 /* We have both a space and an equals. If the space is before the
2027 equals, walk forward over the spaces til we see a nonspace
2028 (possibly the equals). */
2033 /* Now if the = is after the char following the spaces,
2034 take the char following the spaces. */
2038 else if (val
!= 0 && p
== 0)
2042 error_no_arg (_("environment variable to set"));
2044 if (p
== 0 || p
[1] == 0)
2048 p
= arg
+ strlen (arg
); /* So that savestring below will work. */
2052 /* Not setting variable value to null. */
2054 while (*val
== ' ' || *val
== '\t')
2058 while (p
!= arg
&& (p
[-1] == ' ' || p
[-1] == '\t'))
2061 var
= savestring (arg
, p
- arg
);
2064 printf_filtered (_("Setting environment variable "
2065 "\"%s\" to null value.\n"),
2067 set_in_environ (current_inferior ()->environment
, var
, "");
2070 set_in_environ (current_inferior ()->environment
, var
, val
);
2075 unset_environment_command (char *var
, int from_tty
)
2079 /* If there is no argument, delete all environment variables.
2080 Ask for confirmation if reading from the terminal. */
2081 if (!from_tty
|| query (_("Delete all environment variables? ")))
2083 free_environ (current_inferior ()->environment
);
2084 current_inferior ()->environment
= make_environ ();
2088 unset_in_environ (current_inferior ()->environment
, var
);
2091 /* Handle the execution path (PATH variable). */
2093 static const char path_var_name
[] = "PATH";
2096 path_info (char *args
, int from_tty
)
2098 puts_filtered ("Executable and object file path: ");
2099 puts_filtered (get_in_environ (current_inferior ()->environment
,
2101 puts_filtered ("\n");
2104 /* Add zero or more directories to the front of the execution path. */
2107 path_command (char *dirname
, int from_tty
)
2113 env
= get_in_environ (current_inferior ()->environment
, path_var_name
);
2114 /* Can be null if path is not set. */
2117 exec_path
= xstrdup (env
);
2118 mod_path (dirname
, &exec_path
);
2119 set_in_environ (current_inferior ()->environment
, path_var_name
, exec_path
);
2122 path_info ((char *) NULL
, from_tty
);
2126 /* Print out the register NAME with value VAL, to FILE, in the default
2130 default_print_one_register_info (struct ui_file
*file
,
2134 struct type
*regtype
= value_type (val
);
2135 int print_raw_format
;
2137 fputs_filtered (name
, file
);
2138 print_spaces_filtered (15 - strlen (name
), file
);
2140 print_raw_format
= (value_entirely_available (val
)
2141 && !value_optimized_out (val
));
2143 /* If virtual format is floating, print it that way, and in raw
2145 if (TYPE_CODE (regtype
) == TYPE_CODE_FLT
2146 || TYPE_CODE (regtype
) == TYPE_CODE_DECFLOAT
)
2149 struct value_print_options opts
;
2150 const gdb_byte
*valaddr
= value_contents_for_printing (val
);
2151 enum bfd_endian byte_order
= gdbarch_byte_order (get_type_arch (regtype
));
2153 get_user_print_options (&opts
);
2157 value_contents_for_printing (val
),
2158 value_embedded_offset (val
), 0,
2159 file
, 0, val
, &opts
, current_language
);
2161 if (print_raw_format
)
2163 fprintf_filtered (file
, "\t(raw ");
2164 print_hex_chars (file
, valaddr
, TYPE_LENGTH (regtype
), byte_order
);
2165 fprintf_filtered (file
, ")");
2170 struct value_print_options opts
;
2172 /* Print the register in hex. */
2173 get_formatted_print_options (&opts
, 'x');
2176 value_contents_for_printing (val
),
2177 value_embedded_offset (val
), 0,
2178 file
, 0, val
, &opts
, current_language
);
2179 /* If not a vector register, print it also according to its
2181 if (print_raw_format
&& TYPE_VECTOR (regtype
) == 0)
2183 get_user_print_options (&opts
);
2185 fprintf_filtered (file
, "\t");
2187 value_contents_for_printing (val
),
2188 value_embedded_offset (val
), 0,
2189 file
, 0, val
, &opts
, current_language
);
2193 fprintf_filtered (file
, "\n");
2196 /* Print out the machine register regnum. If regnum is -1, print all
2197 registers (print_all == 1) or all non-float and non-vector
2198 registers (print_all == 0).
2200 For most machines, having all_registers_info() print the
2201 register(s) one per line is good enough. If a different format is
2202 required, (eg, for MIPS or Pyramid 90x, which both have lots of
2203 regs), or there is an existing convention for showing all the
2204 registers, define the architecture method PRINT_REGISTERS_INFO to
2205 provide that format. */
2208 default_print_registers_info (struct gdbarch
*gdbarch
,
2209 struct ui_file
*file
,
2210 struct frame_info
*frame
,
2211 int regnum
, int print_all
)
2214 const int numregs
= gdbarch_num_regs (gdbarch
)
2215 + gdbarch_num_pseudo_regs (gdbarch
);
2217 for (i
= 0; i
< numregs
; i
++)
2219 /* Decide between printing all regs, non-float / vector regs, or
2225 if (!gdbarch_register_reggroup_p (gdbarch
, i
, all_reggroup
))
2230 if (!gdbarch_register_reggroup_p (gdbarch
, i
, general_reggroup
))
2240 /* If the register name is empty, it is undefined for this
2241 processor, so don't display anything. */
2242 if (gdbarch_register_name (gdbarch
, i
) == NULL
2243 || *(gdbarch_register_name (gdbarch
, i
)) == '\0')
2246 default_print_one_register_info (file
,
2247 gdbarch_register_name (gdbarch
, i
),
2248 value_of_register (i
, frame
));
2253 registers_info (char *addr_exp
, int fpregs
)
2255 struct frame_info
*frame
;
2256 struct gdbarch
*gdbarch
;
2258 if (!target_has_registers
)
2259 error (_("The program has no registers now."));
2260 frame
= get_selected_frame (NULL
);
2261 gdbarch
= get_frame_arch (frame
);
2265 gdbarch_print_registers_info (gdbarch
, gdb_stdout
,
2270 while (*addr_exp
!= '\0')
2275 /* Skip leading white space. */
2276 addr_exp
= skip_spaces (addr_exp
);
2278 /* Discard any leading ``$''. Check that there is something
2279 resembling a register following it. */
2280 if (addr_exp
[0] == '$')
2282 if (isspace ((*addr_exp
)) || (*addr_exp
) == '\0')
2283 error (_("Missing register name"));
2285 /* Find the start/end of this register name/num/group. */
2287 while ((*addr_exp
) != '\0' && !isspace ((*addr_exp
)))
2291 /* Figure out what we've found and display it. */
2293 /* A register name? */
2295 int regnum
= user_reg_map_name_to_regnum (gdbarch
, start
, end
- start
);
2299 /* User registers lie completely outside of the range of
2300 normal registers. Catch them early so that the target
2302 if (regnum
>= gdbarch_num_regs (gdbarch
)
2303 + gdbarch_num_pseudo_regs (gdbarch
))
2305 struct value
*regval
= value_of_user_reg (regnum
, frame
);
2306 const char *regname
= user_reg_map_regnum_to_name (gdbarch
,
2309 /* Print in the same fashion
2310 gdbarch_print_registers_info's default
2311 implementation prints. */
2312 default_print_one_register_info (gdb_stdout
,
2317 gdbarch_print_registers_info (gdbarch
, gdb_stdout
,
2318 frame
, regnum
, fpregs
);
2323 /* A register group? */
2325 struct reggroup
*group
;
2327 for (group
= reggroup_next (gdbarch
, NULL
);
2329 group
= reggroup_next (gdbarch
, group
))
2331 /* Don't bother with a length check. Should the user
2332 enter a short register group name, go with the first
2333 group that matches. */
2334 if (strncmp (start
, reggroup_name (group
), end
- start
) == 0)
2342 regnum
< gdbarch_num_regs (gdbarch
)
2343 + gdbarch_num_pseudo_regs (gdbarch
);
2346 if (gdbarch_register_reggroup_p (gdbarch
, regnum
, group
))
2347 gdbarch_print_registers_info (gdbarch
,
2355 /* Nothing matched. */
2356 error (_("Invalid register `%.*s'"), (int) (end
- start
), start
);
2361 all_registers_info (char *addr_exp
, int from_tty
)
2363 registers_info (addr_exp
, 1);
2367 nofp_registers_info (char *addr_exp
, int from_tty
)
2369 registers_info (addr_exp
, 0);
2373 print_vector_info (struct ui_file
*file
,
2374 struct frame_info
*frame
, const char *args
)
2376 struct gdbarch
*gdbarch
= get_frame_arch (frame
);
2378 if (gdbarch_print_vector_info_p (gdbarch
))
2379 gdbarch_print_vector_info (gdbarch
, file
, frame
, args
);
2383 int printed_something
= 0;
2386 regnum
< gdbarch_num_regs (gdbarch
)
2387 + gdbarch_num_pseudo_regs (gdbarch
);
2390 if (gdbarch_register_reggroup_p (gdbarch
, regnum
, vector_reggroup
))
2392 printed_something
= 1;
2393 gdbarch_print_registers_info (gdbarch
, file
, frame
, regnum
, 1);
2396 if (!printed_something
)
2397 fprintf_filtered (file
, "No vector information\n");
2402 vector_info (char *args
, int from_tty
)
2404 if (!target_has_registers
)
2405 error (_("The program has no registers now."));
2407 print_vector_info (gdb_stdout
, get_selected_frame (NULL
), args
);
2410 /* Kill the inferior process. Make us have no inferior. */
2413 kill_command (char *arg
, int from_tty
)
2415 /* FIXME: This should not really be inferior_ptid (or target_has_execution).
2416 It should be a distinct flag that indicates that a target is active, cuz
2417 some targets don't have processes! */
2419 if (ptid_equal (inferior_ptid
, null_ptid
))
2420 error (_("The program is not being run."));
2421 if (!query (_("Kill the program being debugged? ")))
2422 error (_("Not confirmed."));
2425 /* If we still have other inferiors to debug, then don't mess with
2426 with their threads. */
2427 if (!have_inferiors ())
2429 init_thread_list (); /* Destroy thread info. */
2431 /* Killing off the inferior can leave us with a core file. If
2432 so, print the state we are left in. */
2433 if (target_has_stack
)
2435 printf_filtered (_("In %s,\n"), target_longname
);
2436 print_stack_frame (get_selected_frame (NULL
), 1, SRC_AND_LOC
, 1);
2439 bfd_cache_close_all ();
2442 /* Used in `attach&' command. ARG is a point to an integer
2443 representing a process id. Proceed threads of this process iff
2444 they stopped due to debugger request, and when they did, they
2445 reported a clean stop (GDB_SIGNAL_0). Do not proceed threads
2446 that have been explicitly been told to stop. */
2449 proceed_after_attach_callback (struct thread_info
*thread
,
2452 int pid
= * (int *) arg
;
2454 if (ptid_get_pid (thread
->ptid
) == pid
2455 && !is_exited (thread
->ptid
)
2456 && !is_executing (thread
->ptid
)
2457 && !thread
->stop_requested
2458 && thread
->suspend
.stop_signal
== GDB_SIGNAL_0
)
2460 switch_to_thread (thread
->ptid
);
2461 clear_proceed_status (0);
2462 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
2469 proceed_after_attach (int pid
)
2471 /* Don't error out if the current thread is running, because
2472 there may be other stopped threads. */
2473 struct cleanup
*old_chain
;
2475 /* Backup current thread and selected frame. */
2476 old_chain
= make_cleanup_restore_current_thread ();
2478 iterate_over_threads (proceed_after_attach_callback
, &pid
);
2480 /* Restore selected ptid. */
2481 do_cleanups (old_chain
);
2484 /* attach_command --
2485 takes a program started up outside of gdb and ``attaches'' to it.
2486 This stops it cold in its tracks and allows us to start debugging it.
2487 and wait for the trace-trap that results from attaching. */
2490 attach_command_post_wait (char *args
, int from_tty
, int async_exec
)
2493 char *full_exec_path
= NULL
;
2494 struct inferior
*inferior
;
2496 inferior
= current_inferior ();
2497 inferior
->control
.stop_soon
= NO_STOP_QUIETLY
;
2499 /* If no exec file is yet known, try to determine it from the
2501 exec_file
= (char *) get_exec_file (0);
2504 exec_file
= target_pid_to_exec_file (ptid_get_pid (inferior_ptid
));
2507 /* It's possible we don't have a full path, but rather just a
2508 filename. Some targets, such as HP-UX, don't provide the
2511 Attempt to qualify the filename against the source path.
2512 (If that fails, we'll just fall back on the original
2513 filename. Not much more we can do...) */
2515 if (!source_full_path_of (exec_file
, &full_exec_path
))
2516 full_exec_path
= xstrdup (exec_file
);
2518 exec_file_attach (full_exec_path
, from_tty
);
2519 symbol_file_add_main (full_exec_path
, from_tty
);
2524 reopen_exec_file ();
2528 /* Take any necessary post-attaching actions for this platform. */
2529 target_post_attach (ptid_get_pid (inferior_ptid
));
2531 post_create_inferior (¤t_target
, from_tty
);
2535 /* The user requested an `attach&', so be sure to leave threads
2536 that didn't get a signal running. */
2538 /* Immediatelly resume all suspended threads of this inferior,
2539 and this inferior only. This should have no effect on
2540 already running threads. If a thread has been stopped with a
2541 signal, leave it be. */
2543 proceed_after_attach (inferior
->pid
);
2546 if (inferior_thread ()->suspend
.stop_signal
== GDB_SIGNAL_0
)
2548 clear_proceed_status (0);
2549 proceed ((CORE_ADDR
) -1, GDB_SIGNAL_DEFAULT
);
2555 /* The user requested a plain `attach', so be sure to leave
2556 the inferior stopped. */
2558 if (target_can_async_p ())
2559 async_enable_stdin ();
2561 /* At least the current thread is already stopped. */
2563 /* In all-stop, by definition, all threads have to be already
2564 stopped at this point. In non-stop, however, although the
2565 selected thread is stopped, others may still be executing.
2566 Be sure to explicitly stop all threads of the process. This
2567 should have no effect on already stopped threads. */
2569 target_stop (pid_to_ptid (inferior
->pid
));
2571 /* Tell the user/frontend where we're stopped. */
2573 if (deprecated_attach_hook
)
2574 deprecated_attach_hook ();
2578 struct attach_command_continuation_args
2586 attach_command_continuation (void *args
, int err
)
2588 struct attach_command_continuation_args
*a
= args
;
2593 attach_command_post_wait (a
->args
, a
->from_tty
, a
->async_exec
);
2597 attach_command_continuation_free_args (void *args
)
2599 struct attach_command_continuation_args
*a
= args
;
2606 attach_command (char *args
, int from_tty
)
2609 struct cleanup
*args_chain
;
2610 struct target_ops
*attach_target
;
2612 dont_repeat (); /* Not for the faint of heart */
2614 if (gdbarch_has_global_solist (target_gdbarch ()))
2615 /* Don't complain if all processes share the same symbol
2618 else if (target_has_execution
)
2620 if (query (_("A program is being debugged already. Kill it? ")))
2623 error (_("Not killed."));
2626 /* Clean up any leftovers from other runs. Some other things from
2627 this function should probably be moved into target_pre_inferior. */
2628 target_pre_inferior (from_tty
);
2630 args
= strip_bg_char (args
, &async_exec
);
2631 args_chain
= make_cleanup (xfree
, args
);
2633 attach_target
= find_attach_target ();
2635 prepare_execution_command (attach_target
, async_exec
);
2637 if (non_stop
&& !attach_target
->to_supports_non_stop (attach_target
))
2638 error (_("Cannot attach to this target in non-stop mode"));
2640 attach_target
->to_attach (attach_target
, args
, from_tty
);
2641 /* to_attach should push the target, so after this point we
2642 shouldn't refer to attach_target again. */
2643 attach_target
= NULL
;
2645 /* Done with ARGS. */
2646 do_cleanups (args_chain
);
2648 /* Set up the "saved terminal modes" of the inferior
2649 based on what modes we are starting it with. */
2650 target_terminal_init ();
2652 /* Install inferior's terminal modes. This may look like a no-op,
2653 as we've just saved them above, however, this does more than
2654 restore terminal settings:
2656 - installs a SIGINT handler that forwards SIGINT to the inferior.
2657 Otherwise a Ctrl-C pressed just while waiting for the initial
2658 stop would end up as a spurious Quit.
2660 - removes stdin from the event loop, which we need if attaching
2661 in the foreground, otherwise on targets that report an initial
2662 stop on attach (which are most) we'd process input/commands
2663 while we're in the event loop waiting for that stop. That is,
2664 before the attach continuation runs and the command is really
2666 target_terminal_inferior ();
2668 /* Set up execution context to know that we should return from
2669 wait_for_inferior as soon as the target reports a stop. */
2670 init_wait_for_inferior ();
2671 clear_proceed_status (0);
2675 /* If we find that the current thread isn't stopped, explicitly
2676 do so now, because we're going to install breakpoints and
2680 /* The user requested an `attach&'; stop just one thread. */
2681 target_stop (inferior_ptid
);
2683 /* The user requested an `attach', so stop all threads of this
2685 target_stop (pid_to_ptid (ptid_get_pid (inferior_ptid
)));
2688 /* Some system don't generate traps when attaching to inferior.
2689 E.g. Mach 3 or GNU hurd. */
2690 if (!target_attach_no_wait
)
2692 struct inferior
*inferior
= current_inferior ();
2694 /* Careful here. See comments in inferior.h. Basically some
2695 OSes don't ignore SIGSTOPs on continue requests anymore. We
2696 need a way for handle_inferior_event to reset the stop_signal
2697 variable after an attach, and this is what
2698 STOP_QUIETLY_NO_SIGSTOP is for. */
2699 inferior
->control
.stop_soon
= STOP_QUIETLY_NO_SIGSTOP
;
2701 if (target_can_async_p ())
2703 /* sync_execution mode. Wait for stop. */
2704 struct attach_command_continuation_args
*a
;
2706 a
= xmalloc (sizeof (*a
));
2707 a
->args
= xstrdup (args
);
2708 a
->from_tty
= from_tty
;
2709 a
->async_exec
= async_exec
;
2710 add_inferior_continuation (attach_command_continuation
, a
,
2711 attach_command_continuation_free_args
);
2715 wait_for_inferior ();
2718 attach_command_post_wait (args
, from_tty
, async_exec
);
2721 /* We had just found out that the target was already attached to an
2722 inferior. PTID points at a thread of this new inferior, that is
2723 the most likely to be stopped right now, but not necessarily so.
2724 The new inferior is assumed to be already added to the inferior
2725 list at this point. If LEAVE_RUNNING, then leave the threads of
2726 this inferior running, except those we've explicitly seen reported
2730 notice_new_inferior (ptid_t ptid
, int leave_running
, int from_tty
)
2732 struct cleanup
* old_chain
;
2735 old_chain
= make_cleanup (null_cleanup
, NULL
);
2737 /* If in non-stop, leave threads as running as they were. If
2738 they're stopped for some reason other than us telling it to, the
2739 target reports a signal != GDB_SIGNAL_0. We don't try to
2740 resume threads with such a stop signal. */
2741 async_exec
= non_stop
;
2743 if (!ptid_equal (inferior_ptid
, null_ptid
))
2744 make_cleanup_restore_current_thread ();
2746 switch_to_thread (ptid
);
2748 /* When we "notice" a new inferior we need to do all the things we
2749 would normally do if we had just attached to it. */
2751 if (is_executing (inferior_ptid
))
2753 struct inferior
*inferior
= current_inferior ();
2755 /* We're going to install breakpoints, and poke at memory,
2756 ensure that the inferior is stopped for a moment while we do
2758 target_stop (inferior_ptid
);
2760 inferior
->control
.stop_soon
= STOP_QUIETLY_REMOTE
;
2762 /* Wait for stop before proceeding. */
2763 if (target_can_async_p ())
2765 struct attach_command_continuation_args
*a
;
2767 a
= xmalloc (sizeof (*a
));
2768 a
->args
= xstrdup ("");
2769 a
->from_tty
= from_tty
;
2770 a
->async_exec
= async_exec
;
2771 add_inferior_continuation (attach_command_continuation
, a
,
2772 attach_command_continuation_free_args
);
2774 do_cleanups (old_chain
);
2778 wait_for_inferior ();
2781 async_exec
= leave_running
;
2782 attach_command_post_wait ("" /* args */, from_tty
, async_exec
);
2784 do_cleanups (old_chain
);
2789 * takes a program previously attached to and detaches it.
2790 * The program resumes execution and will no longer stop
2791 * on signals, etc. We better not have left any breakpoints
2792 * in the program or it'll die when it hits one. For this
2793 * to work, it may be necessary for the process to have been
2794 * previously attached. It *might* work if the program was
2795 * started via the normal ptrace (PTRACE_TRACEME).
2799 detach_command (char *args
, int from_tty
)
2801 dont_repeat (); /* Not for the faint of heart. */
2803 if (ptid_equal (inferior_ptid
, null_ptid
))
2804 error (_("The program is not being run."));
2806 query_if_trace_running (from_tty
);
2808 disconnect_tracing ();
2810 target_detach (args
, from_tty
);
2812 /* If the solist is global across inferiors, don't clear it when we
2813 detach from a single inferior. */
2814 if (!gdbarch_has_global_solist (target_gdbarch ()))
2815 no_shared_libraries (NULL
, from_tty
);
2817 /* If we still have inferiors to debug, then don't mess with their
2819 if (!have_inferiors ())
2820 init_thread_list ();
2822 if (deprecated_detach_hook
)
2823 deprecated_detach_hook ();
2826 /* Disconnect from the current target without resuming it (leaving it
2827 waiting for a debugger).
2829 We'd better not have left any breakpoints in the program or the
2830 next debugger will get confused. Currently only supported for some
2831 remote targets, since the normal attach mechanisms don't work on
2832 stopped processes on some native platforms (e.g. GNU/Linux). */
2835 disconnect_command (char *args
, int from_tty
)
2837 dont_repeat (); /* Not for the faint of heart. */
2838 query_if_trace_running (from_tty
);
2839 disconnect_tracing ();
2840 target_disconnect (args
, from_tty
);
2841 no_shared_libraries (NULL
, from_tty
);
2842 init_thread_list ();
2843 if (deprecated_detach_hook
)
2844 deprecated_detach_hook ();
2848 interrupt_target_1 (int all_threads
)
2853 ptid
= minus_one_ptid
;
2855 ptid
= inferior_ptid
;
2858 /* Tag the thread as having been explicitly requested to stop, so
2859 other parts of gdb know not to resume this thread automatically,
2860 if it was stopped due to an internal event. Limit this to
2861 non-stop mode, as when debugging a multi-threaded application in
2862 all-stop mode, we will only get one stop event --- it's undefined
2863 which thread will report the event. */
2865 set_stop_requested (ptid
, 1);
2869 Stop the execution of the target while running in async mode, in
2870 the backgound. In all-stop, stop the whole process. In non-stop
2871 mode, stop the current thread only by default, or stop all threads
2872 if the `-a' switch is used. */
2875 interrupt_command (char *args
, int from_tty
)
2877 if (target_can_async_p ())
2879 int all_threads
= 0;
2881 dont_repeat (); /* Not for the faint of heart. */
2884 && startswith (args
, "-a"))
2887 if (!non_stop
&& all_threads
)
2888 error (_("-a is meaningless in all-stop mode."));
2890 interrupt_target_1 (all_threads
);
2894 /* See inferior.h. */
2897 default_print_float_info (struct gdbarch
*gdbarch
, struct ui_file
*file
,
2898 struct frame_info
*frame
, const char *args
)
2901 int printed_something
= 0;
2904 regnum
< gdbarch_num_regs (gdbarch
)
2905 + gdbarch_num_pseudo_regs (gdbarch
);
2908 if (gdbarch_register_reggroup_p (gdbarch
, regnum
, float_reggroup
))
2910 printed_something
= 1;
2911 gdbarch_print_registers_info (gdbarch
, file
, frame
, regnum
, 1);
2914 if (!printed_something
)
2915 fprintf_filtered (file
, "No floating-point info "
2916 "available for this processor.\n");
2920 float_info (char *args
, int from_tty
)
2922 struct frame_info
*frame
;
2924 if (!target_has_registers
)
2925 error (_("The program has no registers now."));
2927 frame
= get_selected_frame (NULL
);
2928 gdbarch_print_float_info (get_frame_arch (frame
), gdb_stdout
, frame
, args
);
2932 unset_command (char *args
, int from_tty
)
2934 printf_filtered (_("\"unset\" must be followed by the "
2935 "name of an unset subcommand.\n"));
2936 help_list (unsetlist
, "unset ", all_commands
, gdb_stdout
);
2939 /* Implement `info proc' family of commands. */
2942 info_proc_cmd_1 (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 futher parameters. */
2958 info_proc_cmd (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 (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 (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 (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 (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 (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 (char *args
, int from_tty
)
3008 info_proc_cmd_1 (args
, IP_EXE
, from_tty
);
3011 /* Implement `info proc all'. */
3014 info_proc_cmd_all (char *args
, int from_tty
)
3016 info_proc_cmd_1 (args
, IP_ALL
, from_tty
);
3020 _initialize_infcmd (void)
3022 static struct cmd_list_element
*info_proc_cmdlist
;
3023 struct cmd_list_element
*c
= NULL
;
3024 const char *cmd_name
;
3026 /* Add the filename of the terminal connected to inferior I/O. */
3027 add_setshow_filename_cmd ("inferior-tty", class_run
,
3028 &inferior_io_terminal_scratch
, _("\
3029 Set terminal for future runs of program being debugged."), _("\
3030 Show terminal for future runs of program being debugged."), _("\
3031 Usage: set inferior-tty /dev/pts/1"),
3032 set_inferior_tty_command
,
3033 show_inferior_tty_command
,
3034 &setlist
, &showlist
);
3035 add_com_alias ("tty", "set inferior-tty", class_alias
, 0);
3038 add_setshow_string_noescape_cmd (cmd_name
, class_run
,
3039 &inferior_args_scratch
, _("\
3040 Set argument list to give program being debugged when it is started."), _("\
3041 Show argument list to give program being debugged when it is started."), _("\
3042 Follow this command with any number of args, to be passed to the program."),
3045 &setlist
, &showlist
);
3046 c
= lookup_cmd (&cmd_name
, setlist
, "", -1, 1);
3047 gdb_assert (c
!= NULL
);
3048 set_cmd_completer (c
, filename_completer
);
3050 c
= add_cmd ("environment", no_class
, environment_info
, _("\
3051 The environment to give the program, or one variable's value.\n\
3052 With an argument VAR, prints the value of environment variable VAR to\n\
3053 give the program being debugged. With no arguments, prints the entire\n\
3054 environment to be given to the program."), &showlist
);
3055 set_cmd_completer (c
, noop_completer
);
3057 add_prefix_cmd ("unset", no_class
, unset_command
,
3058 _("Complement to certain \"set\" commands."),
3059 &unsetlist
, "unset ", 0, &cmdlist
);
3061 c
= add_cmd ("environment", class_run
, unset_environment_command
, _("\
3062 Cancel environment variable VAR for the program.\n\
3063 This does not affect the program until the next \"run\" command."),
3065 set_cmd_completer (c
, noop_completer
);
3067 c
= add_cmd ("environment", class_run
, set_environment_command
, _("\
3068 Set environment variable value to give the program.\n\
3069 Arguments are VAR VALUE where VAR is variable name and VALUE is value.\n\
3070 VALUES of environment variables are uninterpreted strings.\n\
3071 This does not affect the program until the next \"run\" command."),
3073 set_cmd_completer (c
, noop_completer
);
3075 c
= add_com ("path", class_files
, path_command
, _("\
3076 Add directory DIR(s) to beginning of search path for object files.\n\
3077 $cwd in the path means the current working directory.\n\
3078 This path is equivalent to the $PATH shell variable. It is a list of\n\
3079 directories, separated by colons. These directories are searched to find\n\
3080 fully linked executable files and separately compiled object files as \
3082 set_cmd_completer (c
, filename_completer
);
3084 c
= add_cmd ("paths", no_class
, path_info
, _("\
3085 Current search path for finding object files.\n\
3086 $cwd in the path means the current working directory.\n\
3087 This path is equivalent to the $PATH shell variable. It is a list of\n\
3088 directories, separated by colons. These directories are searched to find\n\
3089 fully linked executable files and separately compiled object files as \
3092 set_cmd_completer (c
, noop_completer
);
3094 add_prefix_cmd ("kill", class_run
, kill_command
,
3095 _("Kill execution of program being debugged."),
3096 &killlist
, "kill ", 0, &cmdlist
);
3098 add_com ("attach", class_run
, attach_command
, _("\
3099 Attach to a process or file outside of GDB.\n\
3100 This command attaches to another target, of the same type as your last\n\
3101 \"target\" command (\"info files\" will show your target stack).\n\
3102 The command may take as argument a process id or a device file.\n\
3103 For a process id, you must have permission to send the process a signal,\n\
3104 and it must have the same effective uid as the debugger.\n\
3105 When using \"attach\" with a process id, the debugger finds the\n\
3106 program running in the process, looking first in the current working\n\
3107 directory, or (if not found there) using the source file search path\n\
3108 (see the \"directory\" command). You can also use the \"file\" command\n\
3109 to specify the program, and to load its symbol table."));
3111 add_prefix_cmd ("detach", class_run
, detach_command
, _("\
3112 Detach a process or file previously attached.\n\
3113 If a process, it is no longer traced, and it continues its execution. If\n\
3114 you were debugging a file, the file is closed and gdb no longer accesses it."),
3115 &detachlist
, "detach ", 0, &cmdlist
);
3117 add_com ("disconnect", class_run
, disconnect_command
, _("\
3118 Disconnect from a target.\n\
3119 The target will wait for another debugger to connect. Not available for\n\
3122 c
= add_com ("signal", class_run
, signal_command
, _("\
3123 Continue program with the specified signal.\n\
3124 Usage: signal SIGNAL\n\
3125 The SIGNAL argument is processed the same as the handle command.\n\
3127 An argument of \"0\" means continue the program without sending it a signal.\n\
3128 This is useful in cases where the program stopped because of a signal,\n\
3129 and you want to resume the program while discarding the signal.\n\
3131 In a multi-threaded program the signal is delivered to, or discarded from,\n\
3132 the current thread only."));
3133 set_cmd_completer (c
, signal_completer
);
3135 c
= add_com ("queue-signal", class_run
, queue_signal_command
, _("\
3136 Queue a signal to be delivered to the current thread when it is resumed.\n\
3137 Usage: queue-signal SIGNAL\n\
3138 The SIGNAL argument is processed the same as the handle command.\n\
3139 It is an error if the handling state of SIGNAL is \"nopass\".\n\
3141 An argument of \"0\" means remove any currently queued signal from\n\
3142 the current thread. This is useful in cases where the program stopped\n\
3143 because of a signal, and you want to resume it while discarding the signal.\n\
3145 In a multi-threaded program the signal is queued with, or discarded from,\n\
3146 the current thread only."));
3147 set_cmd_completer (c
, signal_completer
);
3149 add_com ("stepi", class_run
, stepi_command
, _("\
3150 Step one instruction exactly.\n\
3152 Argument N means step N times (or till program stops for another \
3154 add_com_alias ("si", "stepi", class_alias
, 0);
3156 add_com ("nexti", class_run
, nexti_command
, _("\
3157 Step one instruction, but proceed through subroutine calls.\n\
3159 Argument N means step N times (or till program stops for another \
3161 add_com_alias ("ni", "nexti", class_alias
, 0);
3163 add_com ("finish", class_run
, finish_command
, _("\
3164 Execute until selected stack frame returns.\n\
3166 Upon return, the value returned is printed and put in the value history."));
3167 add_com_alias ("fin", "finish", class_run
, 1);
3169 add_com ("next", class_run
, next_command
, _("\
3170 Step program, proceeding through subroutine calls.\n\
3172 Unlike \"step\", if the current source line calls a subroutine,\n\
3173 this command does not enter the subroutine, but instead steps over\n\
3174 the call, in effect treating it as a single source line."));
3175 add_com_alias ("n", "next", class_run
, 1);
3177 add_com_alias ("S", "next", class_run
, 1);
3179 add_com ("step", class_run
, step_command
, _("\
3180 Step program until it reaches a different source line.\n\
3182 Argument N means step N times (or till program stops for another \
3184 add_com_alias ("s", "step", class_run
, 1);
3186 c
= add_com ("until", class_run
, until_command
, _("\
3187 Execute until the program reaches a source line greater than the current\n\
3188 or a specified location (same args as break command) within the current \
3190 set_cmd_completer (c
, location_completer
);
3191 add_com_alias ("u", "until", class_run
, 1);
3193 c
= add_com ("advance", class_run
, advance_command
, _("\
3194 Continue the program up to the given location (same form as args for break \
3196 Execution will also stop upon exit from the current stack frame."));
3197 set_cmd_completer (c
, location_completer
);
3199 c
= add_com ("jump", class_run
, jump_command
, _("\
3200 Continue program being debugged at specified line or address.\n\
3201 Usage: jump <location>\n\
3202 Give as argument either LINENUM or *ADDR, where ADDR is an expression\n\
3203 for an address to start at."));
3204 set_cmd_completer (c
, location_completer
);
3205 add_com_alias ("j", "jump", class_run
, 1);
3209 c
= add_com ("go", class_run
, go_command
, _("\
3210 Usage: go <location>\n\
3211 Continue program being debugged, stopping at specified line or \n\
3213 Give as argument either LINENUM or *ADDR, where ADDR is an \n\
3214 expression for an address to start at.\n\
3215 This command is a combination of tbreak and jump."));
3216 set_cmd_completer (c
, location_completer
);
3220 add_com_alias ("g", "go", class_run
, 1);
3222 add_com ("continue", class_run
, continue_command
, _("\
3223 Continue program being debugged, after signal or breakpoint.\n\
3224 Usage: continue [N]\n\
3225 If proceeding from breakpoint, a number N may be used as an argument,\n\
3226 which means to set the ignore count of that breakpoint to N - 1 (so that\n\
3227 the breakpoint won't break until the Nth time it is reached).\n\
3229 If non-stop mode is enabled, continue only the current thread,\n\
3230 otherwise all the threads in the program are continued. To \n\
3231 continue all stopped threads in non-stop mode, use the -a option.\n\
3232 Specifying -a and an ignore count simultaneously is an error."));
3233 add_com_alias ("c", "cont", class_run
, 1);
3234 add_com_alias ("fg", "cont", class_run
, 1);
3236 c
= add_com ("run", class_run
, run_command
, _("\
3237 Start debugged program. You may specify arguments to give it.\n\
3238 Args may include \"*\", or \"[...]\"; they are expanded using \"sh\".\n\
3239 Input and output redirection with \">\", \"<\", or \">>\" are also \
3241 With no arguments, uses arguments last specified (with \"run\" \
3242 or \"set args\").\n\
3243 To cancel previous arguments and run with no arguments,\n\
3244 use \"set args\" without arguments."));
3245 set_cmd_completer (c
, filename_completer
);
3246 add_com_alias ("r", "run", class_run
, 1);
3248 add_com ("R", class_run
, run_no_args_command
,
3249 _("Start debugged program with no arguments."));
3251 c
= add_com ("start", class_run
, start_command
, _("\
3252 Run the debugged program until the beginning of the main procedure.\n\
3253 You may specify arguments to give to your program, just as with the\n\
3254 \"run\" command."));
3255 set_cmd_completer (c
, filename_completer
);
3257 add_com ("interrupt", class_run
, interrupt_command
,
3258 _("Interrupt the execution of the debugged program.\n\
3259 If non-stop mode is enabled, interrupt only the current thread,\n\
3260 otherwise all the threads in the program are stopped. To \n\
3261 interrupt all running threads in non-stop mode, use the -a option."));
3263 c
= add_info ("registers", nofp_registers_info
, _("\
3264 List of integer registers and their contents, for selected stack frame.\n\
3265 Register name as argument means describe only that register."));
3266 add_info_alias ("r", "registers", 1);
3267 set_cmd_completer (c
, reg_or_group_completer
);
3271 c
= add_com ("lr", class_info
, nofp_registers_info
, _("\
3272 List of integer registers and their contents, for selected stack frame.\n\
3273 Register name as argument means describe only that register."));
3274 set_cmd_completer (c
, reg_or_group_completer
);
3277 c
= add_info ("all-registers", all_registers_info
, _("\
3278 List of all registers and their contents, for selected stack frame.\n\
3279 Register name as argument means describe only that register."));
3280 set_cmd_completer (c
, reg_or_group_completer
);
3282 add_info ("program", program_info
,
3283 _("Execution status of the program."));
3285 add_info ("float", float_info
,
3286 _("Print the status of the floating point unit\n"));
3288 add_info ("vector", vector_info
,
3289 _("Print the status of the vector unit\n"));
3291 add_prefix_cmd ("proc", class_info
, info_proc_cmd
,
3293 Show /proc process information about any running process.\n\
3294 Specify any process id, or use the program being debugged by default."),
3295 &info_proc_cmdlist
, "info proc ",
3296 1/*allow-unknown*/, &infolist
);
3298 add_cmd ("mappings", class_info
, info_proc_cmd_mappings
, _("\
3299 List of mapped memory regions."),
3300 &info_proc_cmdlist
);
3302 add_cmd ("stat", class_info
, info_proc_cmd_stat
, _("\
3303 List process info from /proc/PID/stat."),
3304 &info_proc_cmdlist
);
3306 add_cmd ("status", class_info
, info_proc_cmd_status
, _("\
3307 List process info from /proc/PID/status."),
3308 &info_proc_cmdlist
);
3310 add_cmd ("cwd", class_info
, info_proc_cmd_cwd
, _("\
3311 List current working directory of the process."),
3312 &info_proc_cmdlist
);
3314 add_cmd ("cmdline", class_info
, info_proc_cmd_cmdline
, _("\
3315 List command line arguments of the process."),
3316 &info_proc_cmdlist
);
3318 add_cmd ("exe", class_info
, info_proc_cmd_exe
, _("\
3319 List absolute filename for executable of the process."),
3320 &info_proc_cmdlist
);
3322 add_cmd ("all", class_info
, info_proc_cmd_all
, _("\
3323 List all available /proc info."),
3324 &info_proc_cmdlist
);