1 /* Memory-access and commands for "inferior" process, for GDB.
3 Copyright (C) 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
4 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007,
5 2008, 2009 Free Software Foundation, Inc.
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>. */
24 #include "gdb_string.h"
38 #include "completer.h"
40 #include "event-top.h"
41 #include "parser-defs.h"
43 #include "reggroups.h"
47 #include "gdb_assert.h"
49 #include "target-descriptions.h"
50 #include "user-regs.h"
51 #include "exceptions.h"
52 #include "cli/cli-decode.h"
53 #include "gdbthread.h"
56 /* Functions exported for general use, in inferior.h: */
58 void all_registers_info (char *, int);
60 void registers_info (char *, int);
62 void nexti_command (char *, int);
64 void stepi_command (char *, int);
66 void continue_command (char *, int);
68 void interrupt_target_command (char *args
, int from_tty
);
70 /* Local functions: */
72 static void nofp_registers_info (char *, int);
74 static void print_return_value (struct type
*func_type
,
75 struct type
*value_type
);
77 static void until_next_command (int);
79 static void until_command (char *, int);
81 static void path_info (char *, int);
83 static void path_command (char *, int);
85 static void unset_command (char *, int);
87 static void float_info (char *, int);
89 static void disconnect_command (char *, int);
91 static void unset_environment_command (char *, int);
93 static void set_environment_command (char *, int);
95 static void environment_info (char *, int);
97 static void program_info (char *, int);
99 static void finish_command (char *, int);
101 static void signal_command (char *, int);
103 static void jump_command (char *, int);
105 static void step_1 (int, int, char *);
106 static void step_once (int skip_subroutines
, int single_inst
, int count
, int thread
);
108 static void next_command (char *, int);
110 static void step_command (char *, int);
112 static void run_command (char *, int);
114 static void run_no_args_command (char *args
, int from_tty
);
116 static void go_command (char *line_no
, int from_tty
);
118 static int strip_bg_char (char **);
120 void _initialize_infcmd (void);
122 #define ERROR_NO_INFERIOR \
123 if (!target_has_execution) error (_("The program is not being run."));
125 /* String containing arguments to give to the program, separated by spaces.
126 Empty string (pointer to '\0') means no args. */
128 static char *inferior_args
;
130 /* The inferior arguments as a vector. If INFERIOR_ARGC is nonzero,
131 then we must compute INFERIOR_ARGS from this (via the target). */
133 static int inferior_argc
;
134 static char **inferior_argv
;
136 /* File name for default use for standard in/out in the inferior. */
138 static char *inferior_io_terminal
;
140 /* Pid of our debugged inferior, or 0 if no inferior now.
141 Since various parts of infrun.c test this to see whether there is a program
142 being debugged it should be nonzero (currently 3 is used) for remote
145 ptid_t inferior_ptid
;
147 /* Address at which inferior stopped. */
151 /* Flag indicating that a command has proceeded the inferior past the
152 current breakpoint. */
154 int breakpoint_proceeded
;
156 /* Nonzero if stopped due to completion of a stack dummy routine. */
158 int stop_stack_dummy
;
160 /* Nonzero if stopped due to a random (unexpected) signal in inferior
163 int stopped_by_random_signal
;
165 /* Environment to use for running inferior,
166 in format described in environ.h. */
168 struct gdb_environ
*inferior_environ
;
170 /* When set, no calls to target_resumed observer will be made. */
171 int suppress_resume_observer
= 0;
172 /* When set, normal_stop will not call the normal_stop observer. */
173 int suppress_stop_observer
= 0;
175 /* Accessor routines. */
178 set_inferior_io_terminal (const char *terminal_name
)
180 if (inferior_io_terminal
)
181 xfree (inferior_io_terminal
);
184 inferior_io_terminal
= NULL
;
186 inferior_io_terminal
= savestring (terminal_name
, strlen (terminal_name
));
190 get_inferior_io_terminal (void)
192 return inferior_io_terminal
;
196 get_inferior_args (void)
198 if (inferior_argc
!= 0)
202 n
= gdbarch_construct_inferior_arguments (current_gdbarch
,
203 inferior_argc
, inferior_argv
);
204 old
= set_inferior_args (n
);
208 if (inferior_args
== NULL
)
209 inferior_args
= xstrdup ("");
211 return inferior_args
;
215 set_inferior_args (char *newargs
)
217 char *saved_args
= inferior_args
;
219 inferior_args
= newargs
;
227 set_inferior_args_vector (int argc
, char **argv
)
229 inferior_argc
= argc
;
230 inferior_argv
= argv
;
233 /* Notice when `set args' is run. */
235 notice_args_set (char *args
, int from_tty
, struct cmd_list_element
*c
)
241 /* Notice when `show args' is run. */
243 notice_args_read (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. */
255 construct_inferior_arguments (struct gdbarch
*gdbarch
, int argc
, char **argv
)
259 if (STARTUP_WITH_SHELL
)
261 /* This holds all the characters considered special to the
262 typical Unix shells. We include `^' because the SunOS
263 /bin/sh treats it as a synonym for `|'. */
264 char *special
= "\"!#$&*()\\|[]{}<>?'\"`~^; \t\n";
269 /* We over-compute the size. It shouldn't matter. */
270 for (i
= 0; i
< argc
; ++i
)
271 length
+= 3 * strlen (argv
[i
]) + 1 + 2 * (argv
[i
][0] == '\0');
273 result
= (char *) xmalloc (length
);
276 for (i
= 0; i
< argc
; ++i
)
281 /* Need to handle empty arguments specially. */
282 if (argv
[i
][0] == '\0')
289 for (cp
= argv
[i
]; *cp
; ++cp
)
293 /* A newline cannot be quoted with a backslash (it
294 just disappears), only by putting it inside
302 if (strchr (special
, *cp
) != NULL
)
313 /* In this case we can't handle arguments that contain spaces,
314 tabs, or newlines -- see breakup_args(). */
318 for (i
= 0; i
< argc
; ++i
)
320 char *cp
= strchr (argv
[i
], ' ');
322 cp
= strchr (argv
[i
], '\t');
324 cp
= strchr (argv
[i
], '\n');
326 error (_("can't handle command-line argument containing whitespace"));
327 length
+= strlen (argv
[i
]) + 1;
330 result
= (char *) xmalloc (length
);
332 for (i
= 0; i
< argc
; ++i
)
335 strcat (result
, " ");
336 strcat (result
, argv
[i
]);
344 /* This function detects whether or not a '&' character (indicating
345 background execution) has been added as *the last* of the arguments ARGS
346 of a command. If it has, it removes it and returns 1. Otherwise it
347 does nothing and returns 0. */
349 strip_bg_char (char **args
)
353 p
= strchr (*args
, '&');
357 if (p
== (*args
+ strlen (*args
) - 1))
359 if (strlen (*args
) > 1)
363 while (*p
== ' ' || *p
== '\t');
375 tty_command (char *file
, int from_tty
)
378 error_no_arg (_("terminal name for running target process"));
380 set_inferior_io_terminal (file
);
383 /* Common actions to take after creating any sort of inferior, by any
384 means (running, attaching, connecting, et cetera). The target
385 should be stopped. */
388 post_create_inferior (struct target_ops
*target
, int from_tty
)
390 /* Be sure we own the terminal in case write operations are performed. */
391 target_terminal_ours ();
393 /* If the target hasn't taken care of this already, do it now.
394 Targets which need to access registers during to_open,
395 to_create_inferior, or to_attach should do it earlier; but many
397 target_find_description ();
399 /* If the solist is global across processes, there's no need to
401 if (exec_bfd
&& !gdbarch_has_global_solist (target_gdbarch
))
403 /* Sometimes the platform-specific hook loads initial shared
404 libraries, and sometimes it doesn't. Try to do so first, so
405 that we can add them with the correct value for FROM_TTY.
406 If we made all the inferior hook methods consistent,
407 this call could be removed. */
409 SOLIB_ADD (NULL
, from_tty
, target
, auto_solib_add
);
411 solib_add (NULL
, from_tty
, target
, auto_solib_add
);
417 /* Create the hooks to handle shared library load and unload
419 #ifdef SOLIB_CREATE_INFERIOR_HOOK
420 SOLIB_CREATE_INFERIOR_HOOK (PIDGET (inferior_ptid
));
422 solib_create_inferior_hook ();
426 observer_notify_inferior_created (target
, from_tty
);
429 /* Kill the inferior if already running. This function is designed
430 to be called when we are about to start the execution of the program
431 from the beginning. Ask the user to confirm that he wants to restart
432 the program being debugged when FROM_TTY is non-null. */
435 kill_if_already_running (int from_tty
)
437 if (! ptid_equal (inferior_ptid
, null_ptid
) && target_has_execution
)
439 /* Bail out before killing the program if we will not be able to
441 target_require_runnable ();
444 && !query ("The program being debugged has been started already.\n\
445 Start it from the beginning? "))
446 error (_("Program not restarted."));
451 /* Implement the "run" command. If TBREAK_AT_MAIN is set, then insert
452 a temporary breakpoint at the begining of the main program before
453 running the program. */
456 run_command_1 (char *args
, int from_tty
, int tbreak_at_main
)
462 kill_if_already_running (from_tty
);
464 init_wait_for_inferior ();
465 clear_breakpoint_hit_counts ();
467 /* Clean up any leftovers from other runs. Some other things from
468 this function should probably be moved into target_pre_inferior. */
469 target_pre_inferior (from_tty
);
471 /* The comment here used to read, "The exec file is re-read every
472 time we do a generic_mourn_inferior, so we just have to worry
473 about the symbol file." The `generic_mourn_inferior' function
474 gets called whenever the program exits. However, suppose the
475 program exits, and *then* the executable file changes? We need
476 to check again here. Since reopen_exec_file doesn't do anything
477 if the timestamp hasn't changed, I don't see the harm. */
481 /* Insert the temporary breakpoint if a location was specified. */
483 tbreak_command (main_name (), 0);
485 exec_file
= (char *) get_exec_file (0);
487 if (non_stop
&& !target_supports_non_stop ())
488 error (_("The target does not support running in non-stop mode."));
490 /* We keep symbols from add-symbol-file, on the grounds that the
491 user might want to add some symbols before running the program
492 (right?). But sometimes (dynamic loading where the user manually
493 introduces the new symbols with add-symbol-file), the code which
494 the symbols describe does not persist between runs. Currently
495 the user has to manually nuke all symbols between runs if they
496 want them to go away (PR 2207). This is probably reasonable. */
500 if (target_can_async_p ())
501 async_disable_stdin ();
505 int async_exec
= strip_bg_char (&args
);
507 /* If we get a request for running in the bg but the target
508 doesn't support it, error out. */
509 if (async_exec
&& !target_can_async_p ())
510 error (_("Asynchronous execution not supported on this target."));
512 /* If we don't get a request of running in the bg, then we need
513 to simulate synchronous (fg) execution. */
514 if (!async_exec
&& target_can_async_p ())
516 /* Simulate synchronous execution */
517 async_disable_stdin ();
520 /* If there were other args, beside '&', process them. */
523 char *old_args
= set_inferior_args (xstrdup (args
));
530 ui_out_field_string (uiout
, NULL
, "Starting program");
531 ui_out_text (uiout
, ": ");
533 ui_out_field_string (uiout
, "execfile", exec_file
);
534 ui_out_spaces (uiout
, 1);
535 /* We call get_inferior_args() because we might need to compute
537 ui_out_field_string (uiout
, "infargs", get_inferior_args ());
538 ui_out_text (uiout
, "\n");
539 ui_out_flush (uiout
);
542 /* We call get_inferior_args() because we might need to compute
544 target_create_inferior (exec_file
, get_inferior_args (),
545 environ_vector (inferior_environ
), from_tty
);
547 /* Pass zero for FROM_TTY, because at this point the "run" command
548 has done its thing; now we are setting up the running program. */
549 post_create_inferior (¤t_target
, 0);
551 /* Start the target running. */
552 proceed ((CORE_ADDR
) -1, TARGET_SIGNAL_0
, 0);
557 run_command (char *args
, int from_tty
)
559 run_command_1 (args
, from_tty
, 0);
563 run_no_args_command (char *args
, int from_tty
)
565 char *old_args
= set_inferior_args (xstrdup (""));
570 /* Start the execution of the program up until the beginning of the main
574 start_command (char *args
, int from_tty
)
576 /* Some languages such as Ada need to search inside the program
577 minimal symbols for the location where to put the temporary
578 breakpoint before starting. */
579 if (!have_minimal_symbols ())
580 error (_("No symbol table loaded. Use the \"file\" command."));
582 /* Run the program until reaching the main procedure... */
583 run_command_1 (args
, from_tty
, 1);
587 proceed_thread_callback (struct thread_info
*thread
, void *arg
)
589 /* We go through all threads individually instead of compressing
590 into a single target `resume_all' request, because some threads
591 may be stopped in internal breakpoints/events, or stopped waiting
592 for its turn in the displaced stepping queue (that is, they are
593 running && !executing). The target side has no idea about why
594 the thread is stopped, so a `resume_all' command would resume too
595 much. If/when GDB gains a way to tell the target `hold this
596 thread stopped until I say otherwise', then we can optimize
598 if (!is_stopped (thread
->ptid
))
601 switch_to_thread (thread
->ptid
);
602 clear_proceed_status ();
603 proceed ((CORE_ADDR
) -1, TARGET_SIGNAL_DEFAULT
, 0);
608 continue_1 (int all_threads
)
612 if (non_stop
&& all_threads
)
614 /* Don't error out if the current thread is running, because
615 there may be other stopped threads. */
616 struct cleanup
*old_chain
;
618 /* Backup current thread and selected frame. */
619 old_chain
= make_cleanup_restore_current_thread ();
621 iterate_over_threads (proceed_thread_callback
, NULL
);
623 /* Restore selected ptid. */
624 do_cleanups (old_chain
);
628 ensure_not_running ();
629 clear_proceed_status ();
630 proceed ((CORE_ADDR
) -1, TARGET_SIGNAL_DEFAULT
, 0);
634 /* continue [-a] [proceed-count] [&] */
636 continue_command (char *args
, int from_tty
)
642 /* Find out whether we must run in the background. */
644 async_exec
= strip_bg_char (&args
);
646 /* If we must run in the background, but the target can't do it,
648 if (async_exec
&& !target_can_async_p ())
649 error (_("Asynchronous execution not supported on this target."));
651 /* If we are not asked to run in the bg, then prepare to run in the
652 foreground, synchronously. */
653 if (!async_exec
&& target_can_async_p ())
655 /* Simulate synchronous execution */
656 async_disable_stdin ();
661 if (strncmp (args
, "-a", sizeof ("-a") - 1) == 0)
664 args
+= sizeof ("-a") - 1;
670 if (!non_stop
&& all_threads
)
671 error (_("`-a' is meaningless in all-stop mode."));
673 if (args
!= NULL
&& all_threads
)
675 Can't resume all threads and specify proceed count simultaneously."));
677 /* If we have an argument left, set proceed count of breakpoint we
684 struct thread_info
*tp
;
687 tp
= find_thread_pid (inferior_ptid
);
691 struct target_waitstatus ws
;
693 get_last_target_status (&last_ptid
, &ws
);
694 tp
= find_thread_pid (last_ptid
);
697 bs
= tp
->stop_bpstat
;
699 while ((stat
= bpstat_num (&bs
, &num
)) != 0)
702 set_ignore_count (num
,
703 parse_and_eval_long (args
) - 1,
705 /* set_ignore_count prints a message ending with a period.
706 So print two spaces before "Continuing.". */
708 printf_filtered (" ");
712 if (!stopped
&& from_tty
)
715 ("Not stopped at any breakpoint; argument ignored.\n");
720 printf_filtered (_("Continuing.\n"));
722 continue_1 (all_threads
);
725 /* Step until outside of current statement. */
728 step_command (char *count_string
, int from_tty
)
730 step_1 (0, 0, count_string
);
733 /* Likewise, but skip over subroutine calls as if single instructions. */
736 next_command (char *count_string
, int from_tty
)
738 step_1 (1, 0, count_string
);
741 /* Likewise, but step only one instruction. */
744 stepi_command (char *count_string
, int from_tty
)
746 step_1 (0, 1, count_string
);
750 nexti_command (char *count_string
, int from_tty
)
752 step_1 (1, 1, count_string
);
756 delete_longjmp_breakpoint_cleanup (void *arg
)
758 int thread
= * (int *) arg
;
759 delete_longjmp_breakpoint (thread
);
763 step_1 (int skip_subroutines
, int single_inst
, char *count_string
)
766 struct frame_info
*frame
;
767 struct cleanup
*cleanups
= make_cleanup (null_cleanup
, NULL
);
772 ensure_not_running ();
775 async_exec
= strip_bg_char (&count_string
);
777 /* If we get a request for running in the bg but the target
778 doesn't support it, error out. */
779 if (async_exec
&& !target_can_async_p ())
780 error (_("Asynchronous execution not supported on this target."));
782 /* If we don't get a request of running in the bg, then we need
783 to simulate synchronous (fg) execution. */
784 if (!async_exec
&& target_can_async_p ())
786 /* Simulate synchronous execution */
787 async_disable_stdin ();
790 count
= count_string
? parse_and_eval_long (count_string
) : 1;
792 if (!single_inst
|| skip_subroutines
) /* leave si command alone */
794 if (in_thread_list (inferior_ptid
))
795 thread
= pid_to_thread_id (inferior_ptid
);
797 set_longjmp_breakpoint ();
799 make_cleanup (delete_longjmp_breakpoint_cleanup
, &thread
);
802 /* In synchronous case, all is well; each step_once call will step once. */
803 if (!target_can_async_p ())
805 for (; count
> 0; count
--)
807 struct thread_info
*tp
;
808 step_once (skip_subroutines
, single_inst
, count
, thread
);
810 if (target_has_execution
811 && !ptid_equal (inferior_ptid
, null_ptid
))
812 tp
= inferior_thread ();
816 if (!tp
|| !tp
->stop_step
|| !tp
->step_multi
)
818 /* If we stopped for some reason that is not stepping
819 there are no further steps to make. */
826 do_cleanups (cleanups
);
830 /* In the case of an asynchronous target things get complicated;
831 do only one step for now, before returning control to the
832 event loop. Let the continuation figure out how many other
833 steps we need to do, and handle them one at the time, through
835 step_once (skip_subroutines
, single_inst
, count
, thread
);
837 /* We are running, and the continuation is installed. It will
838 disable the longjmp breakpoint as appropriate. */
839 discard_cleanups (cleanups
);
843 struct step_1_continuation_args
846 int skip_subroutines
;
851 /* Called after we are done with one step operation, to check whether
852 we need to step again, before we print the prompt and return control
853 to the user. If count is > 1, we will need to do one more call to
854 proceed(), via step_once(). Basically it is like step_once and
855 step_1_continuation are co-recursive. */
857 step_1_continuation (void *args
)
859 struct step_1_continuation_args
*a
= args
;
861 if (target_has_execution
)
863 struct thread_info
*tp
;
865 tp
= inferior_thread ();
866 if (tp
->step_multi
&& tp
->stop_step
)
868 /* There are more steps to make, and we did stop due to
869 ending a stepping range. Do another step. */
870 step_once (a
->skip_subroutines
, a
->single_inst
,
871 a
->count
- 1, a
->thread
);
877 /* We either stopped for some reason that is not stepping, or there
878 are no further steps to make. Cleanup. */
879 if (!a
->single_inst
|| a
->skip_subroutines
)
880 delete_longjmp_breakpoint (a
->thread
);
883 /* Do just one step operation. This is useful to implement the 'step
884 n' kind of commands. In case of asynchronous targets, we will have
885 to set up a continuation to be done after the target stops (after
886 this one step). For synch targets, the caller handles further
890 step_once (int skip_subroutines
, int single_inst
, int count
, int thread
)
892 struct frame_info
*frame
;
896 /* Don't assume THREAD is a valid thread id. It is set to -1 if
897 the longjmp breakpoint was not required. Use the
898 INFERIOR_PTID thread instead, which is the same thread when
900 struct thread_info
*tp
= inferior_thread ();
901 clear_proceed_status ();
903 frame
= get_current_frame ();
904 tp
->step_frame_id
= get_frame_id (frame
);
910 pc
= get_frame_pc (frame
);
911 find_pc_line_pc_range (pc
,
912 &tp
->step_range_start
, &tp
->step_range_end
);
914 /* If we have no line info, switch to stepi mode. */
915 if (tp
->step_range_end
== 0 && step_stop_if_no_debug
)
917 tp
->step_range_start
= tp
->step_range_end
= 1;
919 else if (tp
->step_range_end
== 0)
922 if (find_pc_partial_function (pc
, &name
,
923 &tp
->step_range_start
,
924 &tp
->step_range_end
) == 0)
925 error (_("Cannot find bounds of current function"));
927 target_terminal_ours ();
928 printf_filtered (_("\
929 Single stepping until exit from function %s, \n\
930 which has no line number information.\n"), name
);
935 /* Say we are stepping, but stop after one insn whatever it does. */
936 tp
->step_range_start
= tp
->step_range_end
= 1;
937 if (!skip_subroutines
)
939 Don't step over function calls, not even to functions lacking
941 tp
->step_over_calls
= STEP_OVER_NONE
;
944 if (skip_subroutines
)
945 tp
->step_over_calls
= STEP_OVER_ALL
;
947 tp
->step_multi
= (count
> 1);
948 proceed ((CORE_ADDR
) -1, TARGET_SIGNAL_DEFAULT
, 1);
950 /* For async targets, register a continuation to do any
951 additional steps. For sync targets, the caller will handle
953 if (target_can_async_p ())
955 struct step_1_continuation_args
*args
;
957 args
= xmalloc (sizeof (*args
));
958 args
->skip_subroutines
= skip_subroutines
;
959 args
->single_inst
= single_inst
;
961 args
->thread
= thread
;
963 add_intermediate_continuation (tp
, step_1_continuation
, args
, xfree
);
969 /* Continue program at specified address. */
972 jump_command (char *arg
, int from_tty
)
975 struct symtabs_and_lines sals
;
976 struct symtab_and_line sal
;
982 ensure_not_running ();
984 /* Find out whether we must run in the background. */
986 async_exec
= strip_bg_char (&arg
);
988 /* If we must run in the background, but the target can't do it,
990 if (async_exec
&& !target_can_async_p ())
991 error (_("Asynchronous execution not supported on this target."));
994 error_no_arg (_("starting address"));
996 sals
= decode_line_spec_1 (arg
, 1);
999 error (_("Unreasonable jump request"));
1005 if (sal
.symtab
== 0 && sal
.pc
== 0)
1006 error (_("No source file has been specified."));
1008 resolve_sal_pc (&sal
); /* May error out */
1010 /* See if we are trying to jump to another function. */
1011 fn
= get_frame_function (get_current_frame ());
1012 sfn
= find_pc_function (sal
.pc
);
1013 if (fn
!= NULL
&& sfn
!= fn
)
1015 if (!query ("Line %d is not in `%s'. Jump anyway? ", sal
.line
,
1016 SYMBOL_PRINT_NAME (fn
)))
1018 error (_("Not confirmed."));
1025 fixup_symbol_section (sfn
, 0);
1026 if (section_is_overlay (SYMBOL_OBJ_SECTION (sfn
)) &&
1027 !section_is_mapped (SYMBOL_OBJ_SECTION (sfn
)))
1029 if (!query ("WARNING!!! Destination is in unmapped overlay! Jump anyway? "))
1031 error (_("Not confirmed."));
1041 printf_filtered (_("Continuing at "));
1042 fputs_filtered (paddress (addr
), gdb_stdout
);
1043 printf_filtered (".\n");
1046 /* If we are not asked to run in the bg, then prepare to run in the
1047 foreground, synchronously. */
1048 if (!async_exec
&& target_can_async_p ())
1050 /* Simulate synchronous execution */
1051 async_disable_stdin ();
1054 clear_proceed_status ();
1055 proceed (addr
, TARGET_SIGNAL_0
, 0);
1059 /* Go to line or address in current procedure */
1061 go_command (char *line_no
, int from_tty
)
1063 if (line_no
== (char *) NULL
|| !*line_no
)
1064 printf_filtered (_("Usage: go <location>\n"));
1067 tbreak_command (line_no
, from_tty
);
1068 jump_command (line_no
, from_tty
);
1073 /* Continue program giving it specified signal. */
1076 signal_command (char *signum_exp
, int from_tty
)
1078 enum target_signal oursig
;
1081 dont_repeat (); /* Too dangerous. */
1083 ensure_not_running ();
1085 /* Find out whether we must run in the background. */
1086 if (signum_exp
!= NULL
)
1087 async_exec
= strip_bg_char (&signum_exp
);
1089 /* If we must run in the background, but the target can't do it,
1091 if (async_exec
&& !target_can_async_p ())
1092 error (_("Asynchronous execution not supported on this target."));
1094 /* If we are not asked to run in the bg, then prepare to run in the
1095 foreground, synchronously. */
1096 if (!async_exec
&& target_can_async_p ())
1098 /* Simulate synchronous execution. */
1099 async_disable_stdin ();
1103 error_no_arg (_("signal number"));
1105 /* It would be even slicker to make signal names be valid expressions,
1106 (the type could be "enum $signal" or some such), then the user could
1107 assign them to convenience variables. */
1108 oursig
= target_signal_from_name (signum_exp
);
1110 if (oursig
== TARGET_SIGNAL_UNKNOWN
)
1112 /* No, try numeric. */
1113 int num
= parse_and_eval_long (signum_exp
);
1116 oursig
= TARGET_SIGNAL_0
;
1118 oursig
= target_signal_from_command (num
);
1123 if (oursig
== TARGET_SIGNAL_0
)
1124 printf_filtered (_("Continuing with no signal.\n"));
1126 printf_filtered (_("Continuing with signal %s.\n"),
1127 target_signal_to_name (oursig
));
1130 clear_proceed_status ();
1131 /* "signal 0" should not get stuck if we are stopped at a breakpoint.
1132 FIXME: Neither should "signal foo" but when I tried passing
1133 (CORE_ADDR)-1 unconditionally I got a testsuite failure which I haven't
1134 tried to track down yet. */
1135 proceed (oursig
== TARGET_SIGNAL_0
? (CORE_ADDR
) -1 : stop_pc
, oursig
, 0);
1138 /* Proceed until we reach a different source line with pc greater than
1139 our current one or exit the function. We skip calls in both cases.
1141 Note that eventually this command should probably be changed so
1142 that only source lines are printed out when we hit the breakpoint
1143 we set. This may involve changes to wait_for_inferior and the
1144 proceed status code. */
1147 until_next_command (int from_tty
)
1149 struct frame_info
*frame
;
1151 struct symbol
*func
;
1152 struct symtab_and_line sal
;
1153 struct thread_info
*tp
= inferior_thread ();
1155 clear_proceed_status ();
1157 frame
= get_current_frame ();
1159 /* Step until either exited from this function or greater
1160 than the current line (if in symbolic section) or pc (if
1163 pc
= get_frame_pc (frame
);
1164 func
= find_pc_function (pc
);
1168 struct minimal_symbol
*msymbol
= lookup_minimal_symbol_by_pc (pc
);
1170 if (msymbol
== NULL
)
1171 error (_("Execution is not within a known function."));
1173 tp
->step_range_start
= SYMBOL_VALUE_ADDRESS (msymbol
);
1174 tp
->step_range_end
= pc
;
1178 sal
= find_pc_line (pc
, 0);
1180 tp
->step_range_start
= BLOCK_START (SYMBOL_BLOCK_VALUE (func
));
1181 tp
->step_range_end
= sal
.end
;
1184 tp
->step_over_calls
= STEP_OVER_ALL
;
1185 tp
->step_frame_id
= get_frame_id (frame
);
1187 tp
->step_multi
= 0; /* Only one call to proceed */
1189 proceed ((CORE_ADDR
) -1, TARGET_SIGNAL_DEFAULT
, 1);
1193 until_command (char *arg
, int from_tty
)
1197 if (!target_has_execution
)
1198 error (_("The program is not running."));
1200 /* Find out whether we must run in the background. */
1202 async_exec
= strip_bg_char (&arg
);
1204 /* If we must run in the background, but the target can't do it,
1206 if (async_exec
&& !target_can_async_p ())
1207 error (_("Asynchronous execution not supported on this target."));
1209 /* If we are not asked to run in the bg, then prepare to run in the
1210 foreground, synchronously. */
1211 if (!async_exec
&& target_can_async_p ())
1213 /* Simulate synchronous execution */
1214 async_disable_stdin ();
1218 until_break_command (arg
, from_tty
, 0);
1220 until_next_command (from_tty
);
1224 advance_command (char *arg
, int from_tty
)
1228 if (!target_has_execution
)
1229 error (_("The program is not running."));
1232 error_no_arg (_("a location"));
1234 /* Find out whether we must run in the background. */
1236 async_exec
= strip_bg_char (&arg
);
1238 /* If we must run in the background, but the target can't do it,
1240 if (async_exec
&& !target_can_async_p ())
1241 error (_("Asynchronous execution not supported on this target."));
1243 /* If we are not asked to run in the bg, then prepare to run in the
1244 foreground, synchronously. */
1245 if (!async_exec
&& target_can_async_p ())
1247 /* Simulate synchronous execution. */
1248 async_disable_stdin ();
1251 until_break_command (arg
, from_tty
, 1);
1254 /* Print the result of a function at the end of a 'finish' command. */
1257 print_return_value (struct type
*func_type
, struct type
*value_type
)
1259 struct gdbarch
*gdbarch
= current_gdbarch
;
1260 struct cleanup
*old_chain
;
1261 struct ui_stream
*stb
;
1262 struct value
*value
;
1264 CHECK_TYPEDEF (value_type
);
1265 gdb_assert (TYPE_CODE (value_type
) != TYPE_CODE_VOID
);
1267 /* FIXME: 2003-09-27: When returning from a nested inferior function
1268 call, it's possible (with no help from the architecture vector)
1269 to locate and return/print a "struct return" value. This is just
1270 a more complicated case of what is already being done in in the
1271 inferior function call code. In fact, when inferior function
1272 calls are made async, this will likely be made the norm. */
1274 switch (gdbarch_return_value (gdbarch
, func_type
, value_type
,
1277 case RETURN_VALUE_REGISTER_CONVENTION
:
1278 case RETURN_VALUE_ABI_RETURNS_ADDRESS
:
1279 case RETURN_VALUE_ABI_PRESERVES_ADDRESS
:
1280 value
= allocate_value (value_type
);
1281 gdbarch_return_value (gdbarch
, func_type
, value_type
, stop_registers
,
1282 value_contents_raw (value
), NULL
);
1284 case RETURN_VALUE_STRUCT_CONVENTION
:
1288 internal_error (__FILE__
, __LINE__
, _("bad switch"));
1293 struct value_print_options opts
;
1296 stb
= ui_out_stream_new (uiout
);
1297 old_chain
= make_cleanup_ui_out_stream_delete (stb
);
1298 ui_out_text (uiout
, "Value returned is ");
1299 ui_out_field_fmt (uiout
, "gdb-result-var", "$%d",
1300 record_latest_value (value
));
1301 ui_out_text (uiout
, " = ");
1302 get_raw_print_options (&opts
);
1303 value_print (value
, stb
->stream
, &opts
);
1304 ui_out_field_stream (uiout
, "return-value", stb
);
1305 ui_out_text (uiout
, "\n");
1306 do_cleanups (old_chain
);
1310 ui_out_text (uiout
, "Value returned has type: ");
1311 ui_out_field_string (uiout
, "return-type", TYPE_NAME (value_type
));
1312 ui_out_text (uiout
, ".");
1313 ui_out_text (uiout
, " Cannot determine contents\n");
1317 /* Stuff that needs to be done by the finish command after the target
1318 has stopped. In asynchronous mode, we wait for the target to stop
1319 in the call to poll or select in the event loop, so it is
1320 impossible to do all the stuff as part of the finish_command
1321 function itself. The only chance we have to complete this command
1322 is in fetch_inferior_event, which is called by the event loop as
1323 soon as it detects that the target has stopped. This function is
1324 called via the cmd_continuation pointer. */
1326 struct finish_command_continuation_args
1328 struct breakpoint
*breakpoint
;
1329 struct symbol
*function
;
1333 finish_command_continuation (void *arg
)
1335 struct finish_command_continuation_args
*a
= arg
;
1339 if (!ptid_equal (inferior_ptid
, null_ptid
)
1340 && target_has_execution
1341 && is_stopped (inferior_ptid
))
1342 bs
= inferior_thread ()->stop_bpstat
;
1344 if (bpstat_find_breakpoint (bs
, a
->breakpoint
) != NULL
1345 && a
->function
!= NULL
)
1347 struct type
*value_type
;
1349 value_type
= TYPE_TARGET_TYPE (SYMBOL_TYPE (a
->function
));
1351 internal_error (__FILE__
, __LINE__
,
1352 _("finish_command: function has no target type"));
1354 if (TYPE_CODE (value_type
) != TYPE_CODE_VOID
)
1355 print_return_value (SYMBOL_TYPE (a
->function
), value_type
);
1358 /* We suppress normal call of normal_stop observer and do it here so
1359 that that *stopped notification includes the return value. */
1360 /* NOTE: This is broken in non-stop mode. There is no guarantee the
1361 next stop will be in the same thread that we started doing a
1362 finish on. This suppressing (or some other replacement means)
1363 should be a thread property. */
1364 observer_notify_normal_stop (bs
);
1365 suppress_stop_observer
= 0;
1366 delete_breakpoint (a
->breakpoint
);
1370 finish_command_continuation_free_arg (void *arg
)
1372 /* NOTE: See finish_command_continuation. This would go away, if
1373 this suppressing is made a thread property. */
1374 suppress_stop_observer
= 0;
1378 /* finish_backward -- helper function for finish_command. */
1381 finish_backward (struct symbol
*function
)
1383 struct symtab_and_line sal
;
1384 struct thread_info
*tp
= inferior_thread ();
1385 struct breakpoint
*breakpoint
;
1386 struct cleanup
*old_chain
;
1388 CORE_ADDR func_addr
;
1391 pc
= get_frame_pc (get_current_frame ());
1393 if (find_pc_partial_function (pc
, NULL
, &func_addr
, NULL
) == 0)
1394 internal_error (__FILE__
, __LINE__
,
1395 _("Finish: couldn't find function."));
1397 sal
= find_pc_line (func_addr
, 0);
1399 /* We don't need a return value. */
1400 tp
->proceed_to_finish
= 0;
1401 /* Special case: if we're sitting at the function entry point,
1402 then all we need to do is take a reverse singlestep. We
1403 don't need to set a breakpoint, and indeed it would do us
1406 Note that this can only happen at frame #0, since there's
1407 no way that a function up the stack can have a return address
1408 that's equal to its entry point. */
1412 /* Set breakpoint and continue. */
1414 set_momentary_breakpoint (sal
,
1415 get_frame_id (get_selected_frame (NULL
)),
1417 /* Tell the breakpoint to keep quiet. We won't be done
1418 until we've done another reverse single-step. */
1419 make_breakpoint_silent (breakpoint
);
1420 old_chain
= make_cleanup_delete_breakpoint (breakpoint
);
1421 proceed ((CORE_ADDR
) -1, TARGET_SIGNAL_DEFAULT
, 0);
1422 /* We will be stopped when proceed returns. */
1423 back_up
= bpstat_find_breakpoint (tp
->stop_bpstat
, breakpoint
) != NULL
;
1424 do_cleanups (old_chain
);
1430 /* If in fact we hit the step-resume breakpoint (and not
1431 some other breakpoint), then we're almost there --
1432 we just need to back up by one more single-step. */
1433 tp
->step_range_start
= tp
->step_range_end
= 1;
1434 proceed ((CORE_ADDR
) -1, TARGET_SIGNAL_DEFAULT
, 1);
1439 /* finish_forward -- helper function for finish_command. */
1442 finish_forward (struct symbol
*function
, struct frame_info
*frame
)
1444 struct symtab_and_line sal
;
1445 struct thread_info
*tp
= inferior_thread ();
1446 struct breakpoint
*breakpoint
;
1447 struct cleanup
*old_chain
;
1448 struct finish_command_continuation_args
*cargs
;
1450 sal
= find_pc_line (get_frame_pc (frame
), 0);
1451 sal
.pc
= get_frame_pc (frame
);
1453 breakpoint
= set_momentary_breakpoint (sal
, get_frame_id (frame
),
1456 old_chain
= make_cleanup_delete_breakpoint (breakpoint
);
1458 tp
->proceed_to_finish
= 1; /* We want stop_registers, please... */
1459 make_cleanup_restore_integer (&suppress_stop_observer
);
1460 suppress_stop_observer
= 1;
1461 proceed ((CORE_ADDR
) -1, TARGET_SIGNAL_DEFAULT
, 0);
1463 cargs
= xmalloc (sizeof (*cargs
));
1465 cargs
->breakpoint
= breakpoint
;
1466 cargs
->function
= function
;
1467 add_continuation (tp
, finish_command_continuation
, cargs
,
1468 finish_command_continuation_free_arg
);
1470 discard_cleanups (old_chain
);
1471 if (!target_can_async_p ())
1472 do_all_continuations ();
1475 /* "finish": Set a temporary breakpoint at the place the selected
1476 frame will return to, then continue. */
1479 finish_command (char *arg
, int from_tty
)
1481 struct frame_info
*frame
;
1482 struct symbol
*function
;
1486 /* Find out whether we must run in the background. */
1488 async_exec
= strip_bg_char (&arg
);
1490 /* If we must run in the background, but the target can't do it,
1492 if (async_exec
&& !target_can_async_p ())
1493 error (_("Asynchronous execution not supported on this target."));
1495 /* Don't try to async in reverse. */
1496 if (async_exec
&& execution_direction
== EXEC_REVERSE
)
1497 error (_("Asynchronous 'finish' not supported in reverse."));
1499 /* If we are not asked to run in the bg, then prepare to run in the
1500 foreground, synchronously. */
1501 if (!async_exec
&& target_can_async_p ())
1503 /* Simulate synchronous execution. */
1504 async_disable_stdin ();
1508 error (_("The \"finish\" command does not take any arguments."));
1509 if (!target_has_execution
)
1510 error (_("The program is not running."));
1512 frame
= get_prev_frame (get_selected_frame (_("No selected frame.")));
1514 error (_("\"finish\" not meaningful in the outermost frame."));
1516 clear_proceed_status ();
1518 /* Find the function we will return from. */
1520 function
= find_pc_function (get_frame_pc (get_selected_frame (NULL
)));
1522 /* Print info on the selected frame, including level number but not
1526 if (execution_direction
== EXEC_REVERSE
)
1527 printf_filtered (_("Run back to call of "));
1529 printf_filtered (_("Run till exit from "));
1531 print_stack_frame (get_selected_frame (NULL
), 1, LOCATION
);
1534 if (execution_direction
== EXEC_REVERSE
)
1535 finish_backward (function
);
1537 finish_forward (function
, frame
);
1542 program_info (char *args
, int from_tty
)
1546 struct thread_info
*tp
;
1549 if (!target_has_execution
)
1551 printf_filtered (_("The program being debugged is not being run.\n"));
1556 ptid
= inferior_ptid
;
1559 struct target_waitstatus ws
;
1560 get_last_target_status (&ptid
, &ws
);
1563 if (ptid_equal (ptid
, null_ptid
) || is_exited (ptid
))
1564 error (_("Invalid selected thread."));
1565 else if (is_running (ptid
))
1566 error (_("Selected thread is running."));
1568 tp
= find_thread_pid (ptid
);
1569 bs
= tp
->stop_bpstat
;
1570 stat
= bpstat_num (&bs
, &num
);
1572 target_files_info ();
1573 printf_filtered (_("Program stopped at %s.\n"),
1574 hex_string ((unsigned long) stop_pc
));
1576 printf_filtered (_("It stopped after being stepped.\n"));
1579 /* There may be several breakpoints in the same place, so this
1580 isn't as strange as it seems. */
1585 printf_filtered (_("\
1586 It stopped at a breakpoint that has since been deleted.\n"));
1589 printf_filtered (_("It stopped at breakpoint %d.\n"), num
);
1590 stat
= bpstat_num (&bs
, &num
);
1593 else if (tp
->stop_signal
!= TARGET_SIGNAL_0
)
1595 printf_filtered (_("It stopped with signal %s, %s.\n"),
1596 target_signal_to_name (tp
->stop_signal
),
1597 target_signal_to_string (tp
->stop_signal
));
1602 printf_filtered (_("\
1603 Type \"info stack\" or \"info registers\" for more information.\n"));
1608 environment_info (char *var
, int from_tty
)
1612 char *val
= get_in_environ (inferior_environ
, var
);
1615 puts_filtered (var
);
1616 puts_filtered (" = ");
1617 puts_filtered (val
);
1618 puts_filtered ("\n");
1622 puts_filtered ("Environment variable \"");
1623 puts_filtered (var
);
1624 puts_filtered ("\" not defined.\n");
1629 char **vector
= environ_vector (inferior_environ
);
1632 puts_filtered (*vector
++);
1633 puts_filtered ("\n");
1639 set_environment_command (char *arg
, int from_tty
)
1641 char *p
, *val
, *var
;
1645 error_no_arg (_("environment variable and value"));
1647 /* Find seperation between variable name and value */
1648 p
= (char *) strchr (arg
, '=');
1649 val
= (char *) strchr (arg
, ' ');
1651 if (p
!= 0 && val
!= 0)
1653 /* We have both a space and an equals. If the space is before the
1654 equals, walk forward over the spaces til we see a nonspace
1655 (possibly the equals). */
1660 /* Now if the = is after the char following the spaces,
1661 take the char following the spaces. */
1665 else if (val
!= 0 && p
== 0)
1669 error_no_arg (_("environment variable to set"));
1671 if (p
== 0 || p
[1] == 0)
1675 p
= arg
+ strlen (arg
); /* So that savestring below will work */
1679 /* Not setting variable value to null */
1681 while (*val
== ' ' || *val
== '\t')
1685 while (p
!= arg
&& (p
[-1] == ' ' || p
[-1] == '\t'))
1688 var
= savestring (arg
, p
- arg
);
1691 printf_filtered (_("\
1692 Setting environment variable \"%s\" to null value.\n"),
1694 set_in_environ (inferior_environ
, var
, "");
1697 set_in_environ (inferior_environ
, var
, val
);
1702 unset_environment_command (char *var
, int from_tty
)
1706 /* If there is no argument, delete all environment variables.
1707 Ask for confirmation if reading from the terminal. */
1708 if (!from_tty
|| query (_("Delete all environment variables? ")))
1710 free_environ (inferior_environ
);
1711 inferior_environ
= make_environ ();
1715 unset_in_environ (inferior_environ
, var
);
1718 /* Handle the execution path (PATH variable) */
1720 static const char path_var_name
[] = "PATH";
1723 path_info (char *args
, int from_tty
)
1725 puts_filtered ("Executable and object file path: ");
1726 puts_filtered (get_in_environ (inferior_environ
, path_var_name
));
1727 puts_filtered ("\n");
1730 /* Add zero or more directories to the front of the execution path. */
1733 path_command (char *dirname
, int from_tty
)
1738 env
= get_in_environ (inferior_environ
, path_var_name
);
1739 /* Can be null if path is not set */
1742 exec_path
= xstrdup (env
);
1743 mod_path (dirname
, &exec_path
);
1744 set_in_environ (inferior_environ
, path_var_name
, exec_path
);
1747 path_info ((char *) NULL
, from_tty
);
1751 /* Print out the machine register regnum. If regnum is -1, print all
1752 registers (print_all == 1) or all non-float and non-vector
1753 registers (print_all == 0).
1755 For most machines, having all_registers_info() print the
1756 register(s) one per line is good enough. If a different format is
1757 required, (eg, for MIPS or Pyramid 90x, which both have lots of
1758 regs), or there is an existing convention for showing all the
1759 registers, define the architecture method PRINT_REGISTERS_INFO to
1760 provide that format. */
1763 default_print_registers_info (struct gdbarch
*gdbarch
,
1764 struct ui_file
*file
,
1765 struct frame_info
*frame
,
1766 int regnum
, int print_all
)
1769 const int numregs
= gdbarch_num_regs (gdbarch
)
1770 + gdbarch_num_pseudo_regs (gdbarch
);
1771 gdb_byte buffer
[MAX_REGISTER_SIZE
];
1773 for (i
= 0; i
< numregs
; i
++)
1775 /* Decide between printing all regs, non-float / vector regs, or
1781 if (!gdbarch_register_reggroup_p (gdbarch
, i
, all_reggroup
))
1786 if (!gdbarch_register_reggroup_p (gdbarch
, i
, general_reggroup
))
1796 /* If the register name is empty, it is undefined for this
1797 processor, so don't display anything. */
1798 if (gdbarch_register_name (gdbarch
, i
) == NULL
1799 || *(gdbarch_register_name (gdbarch
, i
)) == '\0')
1802 fputs_filtered (gdbarch_register_name (gdbarch
, i
), file
);
1803 print_spaces_filtered (15 - strlen (gdbarch_register_name
1804 (gdbarch
, i
)), file
);
1806 /* Get the data in raw format. */
1807 if (! frame_register_read (frame
, i
, buffer
))
1809 fprintf_filtered (file
, "*value not available*\n");
1813 /* If virtual format is floating, print it that way, and in raw
1815 if (TYPE_CODE (register_type (gdbarch
, i
)) == TYPE_CODE_FLT
1816 || TYPE_CODE (register_type (gdbarch
, i
)) == TYPE_CODE_DECFLOAT
)
1819 struct value_print_options opts
;
1821 get_user_print_options (&opts
);
1823 val_print (register_type (gdbarch
, i
), buffer
, 0, 0,
1824 file
, 0, &opts
, current_language
);
1826 fprintf_filtered (file
, "\t(raw 0x");
1827 for (j
= 0; j
< register_size (gdbarch
, i
); j
++)
1830 if (gdbarch_byte_order (gdbarch
) == BFD_ENDIAN_BIG
)
1833 idx
= register_size (gdbarch
, i
) - 1 - j
;
1834 fprintf_filtered (file
, "%02x", (unsigned char) buffer
[idx
]);
1836 fprintf_filtered (file
, ")");
1840 struct value_print_options opts
;
1842 /* Print the register in hex. */
1843 get_formatted_print_options (&opts
, 'x');
1845 val_print (register_type (gdbarch
, i
), buffer
, 0, 0,
1848 /* If not a vector register, print it also according to its
1850 if (TYPE_VECTOR (register_type (gdbarch
, i
)) == 0)
1852 get_user_print_options (&opts
);
1854 fprintf_filtered (file
, "\t");
1855 val_print (register_type (gdbarch
, i
), buffer
, 0, 0,
1856 file
, 0, &opts
, current_language
);
1860 fprintf_filtered (file
, "\n");
1865 registers_info (char *addr_exp
, int fpregs
)
1867 struct frame_info
*frame
;
1868 struct gdbarch
*gdbarch
;
1869 int regnum
, numregs
;
1872 if (!target_has_registers
)
1873 error (_("The program has no registers now."));
1874 frame
= get_selected_frame (NULL
);
1875 gdbarch
= get_frame_arch (frame
);
1879 gdbarch_print_registers_info (gdbarch
, gdb_stdout
,
1884 while (*addr_exp
!= '\0')
1889 /* Keep skipping leading white space. */
1890 if (isspace ((*addr_exp
)))
1896 /* Discard any leading ``$''. Check that there is something
1897 resembling a register following it. */
1898 if (addr_exp
[0] == '$')
1900 if (isspace ((*addr_exp
)) || (*addr_exp
) == '\0')
1901 error (_("Missing register name"));
1903 /* Find the start/end of this register name/num/group. */
1905 while ((*addr_exp
) != '\0' && !isspace ((*addr_exp
)))
1909 /* Figure out what we've found and display it. */
1911 /* A register name? */
1913 int regnum
= user_reg_map_name_to_regnum (gdbarch
, start
, end
- start
);
1916 /* User registers lie completely outside of the range of
1917 normal registers. Catch them early so that the target
1919 if (regnum
>= gdbarch_num_regs (gdbarch
)
1920 + gdbarch_num_pseudo_regs (gdbarch
))
1922 struct value_print_options opts
;
1923 struct value
*val
= value_of_user_reg (regnum
, frame
);
1925 printf_filtered ("%s: ", start
);
1926 get_formatted_print_options (&opts
, 'x');
1927 print_scalar_formatted (value_contents (val
),
1928 check_typedef (value_type (val
)),
1929 &opts
, 0, gdb_stdout
);
1930 printf_filtered ("\n");
1933 gdbarch_print_registers_info (gdbarch
, gdb_stdout
,
1934 frame
, regnum
, fpregs
);
1939 /* A register number? (how portable is this one?). */
1942 int regnum
= strtol (start
, &endptr
, 0);
1945 && regnum
< gdbarch_num_regs (gdbarch
)
1946 + gdbarch_num_pseudo_regs (gdbarch
))
1948 gdbarch_print_registers_info (gdbarch
, gdb_stdout
,
1949 frame
, regnum
, fpregs
);
1954 /* A register group? */
1956 struct reggroup
*group
;
1957 for (group
= reggroup_next (gdbarch
, NULL
);
1959 group
= reggroup_next (gdbarch
, group
))
1961 /* Don't bother with a length check. Should the user
1962 enter a short register group name, go with the first
1963 group that matches. */
1964 if (strncmp (start
, reggroup_name (group
), end
- start
) == 0)
1971 regnum
< gdbarch_num_regs (gdbarch
)
1972 + gdbarch_num_pseudo_regs (gdbarch
);
1975 if (gdbarch_register_reggroup_p (gdbarch
, regnum
, group
))
1976 gdbarch_print_registers_info (gdbarch
,
1984 /* Nothing matched. */
1985 error (_("Invalid register `%.*s'"), (int) (end
- start
), start
);
1990 all_registers_info (char *addr_exp
, int from_tty
)
1992 registers_info (addr_exp
, 1);
1996 nofp_registers_info (char *addr_exp
, int from_tty
)
1998 registers_info (addr_exp
, 0);
2002 print_vector_info (struct gdbarch
*gdbarch
, struct ui_file
*file
,
2003 struct frame_info
*frame
, const char *args
)
2005 if (gdbarch_print_vector_info_p (gdbarch
))
2006 gdbarch_print_vector_info (gdbarch
, file
, frame
, args
);
2010 int printed_something
= 0;
2013 regnum
< gdbarch_num_regs (gdbarch
)
2014 + gdbarch_num_pseudo_regs (gdbarch
);
2017 if (gdbarch_register_reggroup_p (gdbarch
, regnum
, vector_reggroup
))
2019 printed_something
= 1;
2020 gdbarch_print_registers_info (gdbarch
, file
, frame
, regnum
, 1);
2023 if (!printed_something
)
2024 fprintf_filtered (file
, "No vector information\n");
2029 vector_info (char *args
, int from_tty
)
2031 if (!target_has_registers
)
2032 error (_("The program has no registers now."));
2034 print_vector_info (current_gdbarch
, gdb_stdout
,
2035 get_selected_frame (NULL
), args
);
2039 /* Used in `attach&' command. ARG is a point to an integer
2040 representing a process id. Proceed threads of this process iff
2041 they stopped due to debugger request, and when they did, they
2042 reported a clean stop (TARGET_SIGNAL_0). Do not proceed threads
2043 that have been explicitly been told to stop. */
2046 proceed_after_attach_callback (struct thread_info
*thread
,
2049 int pid
= * (int *) arg
;
2051 if (ptid_get_pid (thread
->ptid
) == pid
2052 && !is_exited (thread
->ptid
)
2053 && !is_executing (thread
->ptid
)
2054 && !thread
->stop_requested
2055 && thread
->stop_signal
== TARGET_SIGNAL_0
)
2057 switch_to_thread (thread
->ptid
);
2058 clear_proceed_status ();
2059 proceed ((CORE_ADDR
) -1, TARGET_SIGNAL_DEFAULT
, 0);
2066 proceed_after_attach (int pid
)
2068 /* Don't error out if the current thread is running, because
2069 there may be other stopped threads. */
2070 struct cleanup
*old_chain
;
2072 /* Backup current thread and selected frame. */
2073 old_chain
= make_cleanup_restore_current_thread ();
2075 iterate_over_threads (proceed_after_attach_callback
, &pid
);
2077 /* Restore selected ptid. */
2078 do_cleanups (old_chain
);
2083 * Should save/restore the tty state since it might be that the
2084 * program to be debugged was started on this tty and it wants
2085 * the tty in some state other than what we want. If it's running
2086 * on another terminal or without a terminal, then saving and
2087 * restoring the tty state is a harmless no-op.
2088 * This only needs to be done if we are attaching to a process.
2093 takes a program started up outside of gdb and ``attaches'' to it.
2094 This stops it cold in its tracks and allows us to start debugging it.
2095 and wait for the trace-trap that results from attaching. */
2098 attach_command_post_wait (char *args
, int from_tty
, int async_exec
)
2101 char *full_exec_path
= NULL
;
2102 struct inferior
*inferior
;
2104 inferior
= current_inferior ();
2105 inferior
->stop_soon
= NO_STOP_QUIETLY
;
2107 /* If no exec file is yet known, try to determine it from the
2109 exec_file
= (char *) get_exec_file (0);
2112 exec_file
= target_pid_to_exec_file (PIDGET (inferior_ptid
));
2115 /* It's possible we don't have a full path, but rather just a
2116 filename. Some targets, such as HP-UX, don't provide the
2119 Attempt to qualify the filename against the source path.
2120 (If that fails, we'll just fall back on the original
2121 filename. Not much more we can do...)
2123 if (!source_full_path_of (exec_file
, &full_exec_path
))
2124 full_exec_path
= savestring (exec_file
, strlen (exec_file
));
2126 exec_file_attach (full_exec_path
, from_tty
);
2127 symbol_file_add_main (full_exec_path
, from_tty
);
2132 reopen_exec_file ();
2136 /* Take any necessary post-attaching actions for this platform. */
2137 target_post_attach (PIDGET (inferior_ptid
));
2139 post_create_inferior (¤t_target
, from_tty
);
2141 /* Install inferior's terminal modes. */
2142 target_terminal_inferior ();
2146 /* The user requested an `attach&', so be sure to leave threads
2147 that didn't get a signal running. */
2149 /* Immediatelly resume all suspended threads of this inferior,
2150 and this inferior only. This should have no effect on
2151 already running threads. If a thread has been stopped with a
2152 signal, leave it be. */
2154 proceed_after_attach (inferior
->pid
);
2157 if (inferior_thread ()->stop_signal
== TARGET_SIGNAL_0
)
2159 clear_proceed_status ();
2160 proceed ((CORE_ADDR
) -1, TARGET_SIGNAL_DEFAULT
, 0);
2166 /* The user requested a plain `attach', so be sure to leave
2167 the inferior stopped. */
2169 if (target_can_async_p ())
2170 async_enable_stdin ();
2172 /* At least the current thread is already stopped. */
2174 /* In all-stop, by definition, all threads have to be already
2175 stopped at this point. In non-stop, however, although the
2176 selected thread is stopped, others may still be executing.
2177 Be sure to explicitly stop all threads of the process. This
2178 should have no effect on already stopped threads. */
2180 target_stop (pid_to_ptid (inferior
->pid
));
2182 /* Tell the user/frontend where we're stopped. */
2184 if (deprecated_attach_hook
)
2185 deprecated_attach_hook ();
2189 struct attach_command_continuation_args
2197 attach_command_continuation (void *args
)
2199 struct attach_command_continuation_args
*a
= args
;
2200 attach_command_post_wait (a
->args
, a
->from_tty
, a
->async_exec
);
2204 attach_command_continuation_free_args (void *args
)
2206 struct attach_command_continuation_args
*a
= args
;
2212 attach_command (char *args
, int from_tty
)
2215 char *full_exec_path
= NULL
;
2217 struct cleanup
*back_to
= make_cleanup (null_cleanup
, NULL
);
2219 dont_repeat (); /* Not for the faint of heart */
2221 if (target_supports_multi_process ())
2222 /* Don't complain if we can be attached to multiple processes. */
2224 else if (target_has_execution
)
2226 if (query ("A program is being debugged already. Kill it? "))
2229 error (_("Not killed."));
2232 /* Clean up any leftovers from other runs. Some other things from
2233 this function should probably be moved into target_pre_inferior. */
2234 target_pre_inferior (from_tty
);
2236 if (non_stop
&& !target_supports_non_stop ())
2237 error (_("Cannot attach to this target in non-stop mode"));
2241 async_exec
= strip_bg_char (&args
);
2243 /* If we get a request for running in the bg but the target
2244 doesn't support it, error out. */
2245 if (async_exec
&& !target_can_async_p ())
2246 error (_("Asynchronous execution not supported on this target."));
2249 /* If we don't get a request of running in the bg, then we need
2250 to simulate synchronous (fg) execution. */
2251 if (!async_exec
&& target_can_async_p ())
2253 /* Simulate synchronous execution */
2254 async_disable_stdin ();
2255 make_cleanup ((make_cleanup_ftype
*)async_enable_stdin
, NULL
);
2258 target_attach (args
, from_tty
);
2260 /* Set up the "saved terminal modes" of the inferior
2261 based on what modes we are starting it with. */
2262 target_terminal_init ();
2264 /* Set up execution context to know that we should return from
2265 wait_for_inferior as soon as the target reports a stop. */
2266 init_wait_for_inferior ();
2267 clear_proceed_status ();
2271 /* If we find that the current thread isn't stopped, explicitly
2272 do so now, because we're going to install breakpoints and
2276 /* The user requested an `attach&'; stop just one thread. */
2277 target_stop (inferior_ptid
);
2279 /* The user requested an `attach', so stop all threads of this
2281 target_stop (pid_to_ptid (ptid_get_pid (inferior_ptid
)));
2284 /* Some system don't generate traps when attaching to inferior.
2285 E.g. Mach 3 or GNU hurd. */
2286 if (!target_attach_no_wait
)
2288 struct inferior
*inferior
= current_inferior ();
2290 /* Careful here. See comments in inferior.h. Basically some
2291 OSes don't ignore SIGSTOPs on continue requests anymore. We
2292 need a way for handle_inferior_event to reset the stop_signal
2293 variable after an attach, and this is what
2294 STOP_QUIETLY_NO_SIGSTOP is for. */
2295 inferior
->stop_soon
= STOP_QUIETLY_NO_SIGSTOP
;
2297 if (target_can_async_p ())
2299 /* sync_execution mode. Wait for stop. */
2300 struct attach_command_continuation_args
*a
;
2302 a
= xmalloc (sizeof (*a
));
2303 a
->args
= xstrdup (args
);
2304 a
->from_tty
= from_tty
;
2305 a
->async_exec
= async_exec
;
2306 add_inferior_continuation (attach_command_continuation
, a
,
2307 attach_command_continuation_free_args
);
2308 discard_cleanups (back_to
);
2312 wait_for_inferior (0);
2315 attach_command_post_wait (args
, from_tty
, async_exec
);
2316 discard_cleanups (back_to
);
2321 * takes a program previously attached to and detaches it.
2322 * The program resumes execution and will no longer stop
2323 * on signals, etc. We better not have left any breakpoints
2324 * in the program or it'll die when it hits one. For this
2325 * to work, it may be necessary for the process to have been
2326 * previously attached. It *might* work if the program was
2327 * started via the normal ptrace (PTRACE_TRACEME).
2331 detach_command (char *args
, int from_tty
)
2333 dont_repeat (); /* Not for the faint of heart. */
2334 target_detach (args
, from_tty
);
2336 /* If the solist is global across inferiors, don't clear it when we
2337 detach from a single inferior. */
2338 if (!gdbarch_has_global_solist (target_gdbarch
))
2339 no_shared_libraries (NULL
, from_tty
);
2341 /* If the current target interface claims there's still execution,
2342 then don't mess with threads of other processes. */
2343 if (!target_has_execution
)
2344 init_thread_list ();
2346 if (deprecated_detach_hook
)
2347 deprecated_detach_hook ();
2350 /* Disconnect from the current target without resuming it (leaving it
2351 waiting for a debugger).
2353 We'd better not have left any breakpoints in the program or the
2354 next debugger will get confused. Currently only supported for some
2355 remote targets, since the normal attach mechanisms don't work on
2356 stopped processes on some native platforms (e.g. GNU/Linux). */
2359 disconnect_command (char *args
, int from_tty
)
2361 dont_repeat (); /* Not for the faint of heart */
2362 target_disconnect (args
, from_tty
);
2363 no_shared_libraries (NULL
, from_tty
);
2364 init_thread_list ();
2365 if (deprecated_detach_hook
)
2366 deprecated_detach_hook ();
2370 interrupt_target_1 (int all_threads
)
2374 ptid
= minus_one_ptid
;
2376 ptid
= inferior_ptid
;
2379 /* Tag the thread as having been explicitly requested to stop, so
2380 other parts of gdb know not to resume this thread automatically,
2381 if it was stopped due to an internal event. Limit this to
2382 non-stop mode, as when debugging a multi-threaded application in
2383 all-stop mode, we will only get one stop event --- it's undefined
2384 which thread will report the event. */
2386 set_stop_requested (ptid
, 1);
2389 /* Stop the execution of the target while running in async mode, in
2390 the backgound. In all-stop, stop the whole process. In non-stop
2391 mode, stop the current thread only by default, or stop all threads
2392 if the `-a' switch is used. */
2394 /* interrupt [-a] */
2396 interrupt_target_command (char *args
, int from_tty
)
2398 if (target_can_async_p ())
2400 int all_threads
= 0;
2402 dont_repeat (); /* Not for the faint of heart */
2405 && strncmp (args
, "-a", sizeof ("-a") - 1) == 0)
2408 if (!non_stop
&& all_threads
)
2409 error (_("-a is meaningless in all-stop mode."));
2411 interrupt_target_1 (all_threads
);
2416 print_float_info (struct gdbarch
*gdbarch
, struct ui_file
*file
,
2417 struct frame_info
*frame
, const char *args
)
2419 if (gdbarch_print_float_info_p (gdbarch
))
2420 gdbarch_print_float_info (gdbarch
, file
, frame
, args
);
2424 int printed_something
= 0;
2427 regnum
< gdbarch_num_regs (gdbarch
)
2428 + gdbarch_num_pseudo_regs (gdbarch
);
2431 if (gdbarch_register_reggroup_p (gdbarch
, regnum
, float_reggroup
))
2433 printed_something
= 1;
2434 gdbarch_print_registers_info (gdbarch
, file
, frame
, regnum
, 1);
2437 if (!printed_something
)
2438 fprintf_filtered (file
, "\
2439 No floating-point info available for this processor.\n");
2444 float_info (char *args
, int from_tty
)
2446 if (!target_has_registers
)
2447 error (_("The program has no registers now."));
2449 print_float_info (current_gdbarch
, gdb_stdout
,
2450 get_selected_frame (NULL
), args
);
2454 unset_command (char *args
, int from_tty
)
2456 printf_filtered (_("\
2457 \"unset\" must be followed by the name of an unset subcommand.\n"));
2458 help_list (unsetlist
, "unset ", -1, gdb_stdout
);
2462 _initialize_infcmd (void)
2464 struct cmd_list_element
*c
= NULL
;
2466 /* add the filename of the terminal connected to inferior I/O */
2467 add_setshow_filename_cmd ("inferior-tty", class_run
,
2468 &inferior_io_terminal
, _("\
2469 Set terminal for future runs of program being debugged."), _("\
2470 Show terminal for future runs of program being debugged."), _("\
2471 Usage: set inferior-tty /dev/pts/1"), NULL
, NULL
, &setlist
, &showlist
);
2472 add_com_alias ("tty", "set inferior-tty", class_alias
, 0);
2474 add_setshow_optional_filename_cmd ("args", class_run
,
2475 &inferior_args
, _("\
2476 Set argument list to give program being debugged when it is started."), _("\
2477 Show argument list to give program being debugged when it is started."), _("\
2478 Follow this command with any number of args, to be passed to the program."),
2481 &setlist
, &showlist
);
2483 c
= add_cmd ("environment", no_class
, environment_info
, _("\
2484 The environment to give the program, or one variable's value.\n\
2485 With an argument VAR, prints the value of environment variable VAR to\n\
2486 give the program being debugged. With no arguments, prints the entire\n\
2487 environment to be given to the program."), &showlist
);
2488 set_cmd_completer (c
, noop_completer
);
2490 add_prefix_cmd ("unset", no_class
, unset_command
,
2491 _("Complement to certain \"set\" commands."),
2492 &unsetlist
, "unset ", 0, &cmdlist
);
2494 c
= add_cmd ("environment", class_run
, unset_environment_command
, _("\
2495 Cancel environment variable VAR for the program.\n\
2496 This does not affect the program until the next \"run\" command."),
2498 set_cmd_completer (c
, noop_completer
);
2500 c
= add_cmd ("environment", class_run
, set_environment_command
, _("\
2501 Set environment variable value to give the program.\n\
2502 Arguments are VAR VALUE where VAR is variable name and VALUE is value.\n\
2503 VALUES of environment variables are uninterpreted strings.\n\
2504 This does not affect the program until the next \"run\" command."),
2506 set_cmd_completer (c
, noop_completer
);
2508 c
= add_com ("path", class_files
, path_command
, _("\
2509 Add directory DIR(s) to beginning of search path for object files.\n\
2510 $cwd in the path means the current working directory.\n\
2511 This path is equivalent to the $PATH shell variable. It is a list of\n\
2512 directories, separated by colons. These directories are searched to find\n\
2513 fully linked executable files and separately compiled object files as needed."));
2514 set_cmd_completer (c
, filename_completer
);
2516 c
= add_cmd ("paths", no_class
, path_info
, _("\
2517 Current search path for finding object files.\n\
2518 $cwd in the path means the current working directory.\n\
2519 This path is equivalent to the $PATH shell variable. It is a list of\n\
2520 directories, separated by colons. These directories are searched to find\n\
2521 fully linked executable files and separately compiled object files as needed."),
2523 set_cmd_completer (c
, noop_completer
);
2525 add_com ("attach", class_run
, attach_command
, _("\
2526 Attach to a process or file outside of GDB.\n\
2527 This command attaches to another target, of the same type as your last\n\
2528 \"target\" command (\"info files\" will show your target stack).\n\
2529 The command may take as argument a process id or a device file.\n\
2530 For a process id, you must have permission to send the process a signal,\n\
2531 and it must have the same effective uid as the debugger.\n\
2532 When using \"attach\" with a process id, the debugger finds the\n\
2533 program running in the process, looking first in the current working\n\
2534 directory, or (if not found there) using the source file search path\n\
2535 (see the \"directory\" command). You can also use the \"file\" command\n\
2536 to specify the program, and to load its symbol table."));
2538 add_prefix_cmd ("detach", class_run
, detach_command
, _("\
2539 Detach a process or file previously attached.\n\
2540 If a process, it is no longer traced, and it continues its execution. If\n\
2541 you were debugging a file, the file is closed and gdb no longer accesses it."),
2542 &detachlist
, "detach ", 0, &cmdlist
);
2544 add_com ("disconnect", class_run
, disconnect_command
, _("\
2545 Disconnect from a target.\n\
2546 The target will wait for another debugger to connect. Not available for\n\
2549 add_com ("signal", class_run
, signal_command
, _("\
2550 Continue program giving it signal specified by the argument.\n\
2551 An argument of \"0\" means continue program without giving it a signal."));
2553 add_com ("stepi", class_run
, stepi_command
, _("\
2554 Step one instruction exactly.\n\
2555 Argument N means do this N times (or till program stops for another reason)."));
2556 add_com_alias ("si", "stepi", class_alias
, 0);
2558 add_com ("nexti", class_run
, nexti_command
, _("\
2559 Step one instruction, but proceed through subroutine calls.\n\
2560 Argument N means do this N times (or till program stops for another reason)."));
2561 add_com_alias ("ni", "nexti", class_alias
, 0);
2563 add_com ("finish", class_run
, finish_command
, _("\
2564 Execute until selected stack frame returns.\n\
2565 Upon return, the value returned is printed and put in the value history."));
2566 add_com_alias ("fin", "finish", class_run
, 1);
2568 add_com ("next", class_run
, next_command
, _("\
2569 Step program, proceeding through subroutine calls.\n\
2570 Like the \"step\" command as long as subroutine calls do not happen;\n\
2571 when they do, the call is treated as one instruction.\n\
2572 Argument N means do this N times (or till program stops for another reason)."));
2573 add_com_alias ("n", "next", class_run
, 1);
2575 add_com_alias ("S", "next", class_run
, 1);
2577 add_com ("step", class_run
, step_command
, _("\
2578 Step program until it reaches a different source line.\n\
2579 Argument N means do this N times (or till program stops for another reason)."));
2580 add_com_alias ("s", "step", class_run
, 1);
2582 c
= add_com ("until", class_run
, until_command
, _("\
2583 Execute until the program reaches a source line greater than the current\n\
2584 or a specified location (same args as break command) within the current frame."));
2585 set_cmd_completer (c
, location_completer
);
2586 add_com_alias ("u", "until", class_run
, 1);
2588 c
= add_com ("advance", class_run
, advance_command
, _("\
2589 Continue the program up to the given location (same form as args for break command).\n\
2590 Execution will also stop upon exit from the current stack frame."));
2591 set_cmd_completer (c
, location_completer
);
2593 c
= add_com ("jump", class_run
, jump_command
, _("\
2594 Continue program being debugged at specified line or address.\n\
2595 Give as argument either LINENUM or *ADDR, where ADDR is an expression\n\
2596 for an address to start at."));
2597 set_cmd_completer (c
, location_completer
);
2601 c
= add_com ("go", class_run
, go_command
, _("\
2602 Usage: go <location>\n\
2603 Continue program being debugged, stopping at specified line or \n\
2605 Give as argument either LINENUM or *ADDR, where ADDR is an \n\
2606 expression for an address to start at.\n\
2607 This command is a combination of tbreak and jump."));
2608 set_cmd_completer (c
, location_completer
);
2612 add_com_alias ("g", "go", class_run
, 1);
2614 c
= add_com ("continue", class_run
, continue_command
, _("\
2615 Continue program being debugged, after signal or breakpoint.\n\
2616 If proceeding from breakpoint, a number N may be used as an argument,\n\
2617 which means to set the ignore count of that breakpoint to N - 1 (so that\n\
2618 the breakpoint won't break until the Nth time it is reached).\n\
2620 If non-stop mode is enabled, continue only the current thread,\n\
2621 otherwise all the threads in the program are continued. To \n\
2622 continue all stopped threads in non-stop mode, use the -a option.\n\
2623 Specifying -a and an ignore count simultaneously is an error."));
2624 add_com_alias ("c", "cont", class_run
, 1);
2625 add_com_alias ("fg", "cont", class_run
, 1);
2627 c
= add_com ("run", class_run
, run_command
, _("\
2628 Start debugged program. You may specify arguments to give it.\n\
2629 Args may include \"*\", or \"[...]\"; they are expanded using \"sh\".\n\
2630 Input and output redirection with \">\", \"<\", or \">>\" are also allowed.\n\n\
2631 With no arguments, uses arguments last specified (with \"run\" or \"set args\").\n\
2632 To cancel previous arguments and run with no arguments,\n\
2633 use \"set args\" without arguments."));
2634 set_cmd_completer (c
, filename_completer
);
2635 add_com_alias ("r", "run", class_run
, 1);
2637 add_com ("R", class_run
, run_no_args_command
,
2638 _("Start debugged program with no arguments."));
2640 c
= add_com ("start", class_run
, start_command
, _("\
2641 Run the debugged program until the beginning of the main procedure.\n\
2642 You may specify arguments to give to your program, just as with the\n\
2643 \"run\" command."));
2644 set_cmd_completer (c
, filename_completer
);
2646 c
= add_com ("interrupt", class_run
, interrupt_target_command
,
2647 _("Interrupt the execution of the debugged program.\n\
2648 If non-stop mode is enabled, interrupt only the current thread,\n\
2649 otherwise all the threads in the program are stopped. To \n\
2650 interrupt all running threads in non-stop mode, use the -a option."));
2652 add_info ("registers", nofp_registers_info
, _("\
2653 List of integer registers and their contents, for selected stack frame.\n\
2654 Register name as argument means describe only that register."));
2655 add_info_alias ("r", "registers", 1);
2658 add_com ("lr", class_info
, nofp_registers_info
, _("\
2659 List of integer registers and their contents, for selected stack frame.\n\
2660 Register name as argument means describe only that register."));
2661 add_info ("all-registers", all_registers_info
, _("\
2662 List of all registers and their contents, for selected stack frame.\n\
2663 Register name as argument means describe only that register."));
2665 add_info ("program", program_info
,
2666 _("Execution status of the program."));
2668 add_info ("float", float_info
,
2669 _("Print the status of the floating point unit\n"));
2671 add_info ("vector", vector_info
,
2672 _("Print the status of the vector unit\n"));
2674 inferior_environ
= make_environ ();
2675 init_environ (inferior_environ
);