1 /* Memory-access and commands for "inferior" process, for GDB.
2 Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
3 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004
4 Free Software Foundation, Inc.
6 This file is part of GDB.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 59 Temple Place - Suite 330,
21 Boston, MA 02111-1307, USA. */
25 #include "gdb_string.h"
39 #include "completer.h"
41 #include "event-top.h"
42 #include "parser-defs.h"
44 #include "reggroups.h"
47 #include "gdb_assert.h"
49 /* Functions exported for general use, in inferior.h: */
51 void all_registers_info (char *, int);
53 void registers_info (char *, int);
55 void nexti_command (char *, int);
57 void stepi_command (char *, int);
59 void continue_command (char *, int);
61 void interrupt_target_command (char *args
, int from_tty
);
63 /* Local functions: */
65 static void nofp_registers_info (char *, int);
67 static void print_return_value (int struct_return
, struct type
*value_type
);
69 static void finish_command_continuation (struct continuation_arg
*);
71 static void until_next_command (int);
73 static void until_command (char *, int);
75 static void path_info (char *, int);
77 static void path_command (char *, int);
79 static void unset_command (char *, int);
81 static void float_info (char *, int);
83 static void detach_command (char *, int);
85 static void disconnect_command (char *, int);
87 static void unset_environment_command (char *, int);
89 static void set_environment_command (char *, int);
91 static void environment_info (char *, int);
93 static void program_info (char *, int);
95 static void finish_command (char *, int);
97 static void signal_command (char *, int);
99 static void jump_command (char *, int);
101 static void step_1 (int, int, char *);
102 static void step_once (int skip_subroutines
, int single_inst
, int count
);
103 static void step_1_continuation (struct continuation_arg
*arg
);
105 static void next_command (char *, int);
107 static void step_command (char *, int);
109 static void run_command (char *, int);
111 static void run_no_args_command (char *args
, int from_tty
);
113 static void go_command (char *line_no
, int from_tty
);
115 static int strip_bg_char (char **);
117 void _initialize_infcmd (void);
119 #define GO_USAGE "Usage: go <location>\n"
121 #define ERROR_NO_INFERIOR \
122 if (!target_has_execution) error ("The program is not being run.");
124 /* String containing arguments to give to the program, separated by spaces.
125 Empty string (pointer to '\0') means no args. */
127 static char *inferior_args
;
129 /* The inferior arguments as a vector. If INFERIOR_ARGC is nonzero,
130 then we must compute INFERIOR_ARGS from this (via the target). */
132 static int inferior_argc
;
133 static char **inferior_argv
;
135 /* File name for default use for standard in/out in the inferior. */
137 char *inferior_io_terminal
;
139 /* Pid of our debugged inferior, or 0 if no inferior now.
140 Since various parts of infrun.c test this to see whether there is a program
141 being debugged it should be nonzero (currently 3 is used) for remote
144 ptid_t inferior_ptid
;
146 /* Last signal that the inferior received (why it stopped). */
148 enum target_signal stop_signal
;
150 /* Address at which inferior stopped. */
154 /* Chain containing status of breakpoint(s) that we have stopped at. */
158 /* Flag indicating that a command has proceeded the inferior past the
159 current breakpoint. */
161 int breakpoint_proceeded
;
163 /* Nonzero if stopped due to a step command. */
167 /* Nonzero if stopped due to completion of a stack dummy routine. */
169 int stop_stack_dummy
;
171 /* Nonzero if stopped due to a random (unexpected) signal in inferior
174 int stopped_by_random_signal
;
176 /* Range to single step within.
177 If this is nonzero, respond to a single-step signal
178 by continuing to step if the pc is in this range. */
180 CORE_ADDR step_range_start
; /* Inclusive */
181 CORE_ADDR step_range_end
; /* Exclusive */
183 /* Stack frame address as of when stepping command was issued.
184 This is how we know when we step into a subroutine call,
185 and how to set the frame for the breakpoint used to step out. */
187 struct frame_id step_frame_id
;
189 /* Our notion of the current stack pointer. */
190 /* NOTE: cagney/2004-05-09: This variable is not used and should be
191 garbage collected. */
194 enum step_over_calls_kind step_over_calls
;
196 /* If stepping, nonzero means step count is > 1
197 so don't print frame next time inferior stops
198 if it stops due to stepping. */
202 /* Environment to use for running inferior,
203 in format described in environ.h. */
205 struct environ
*inferior_environ
;
207 /* Accessor routines. */
210 get_inferior_args (void)
212 if (inferior_argc
!= 0)
216 n
= gdbarch_construct_inferior_arguments (current_gdbarch
,
217 inferior_argc
, inferior_argv
);
218 old
= set_inferior_args (n
);
222 if (inferior_args
== NULL
)
223 inferior_args
= xstrdup ("");
225 return inferior_args
;
229 set_inferior_args (char *newargs
)
231 char *saved_args
= inferior_args
;
233 inferior_args
= newargs
;
241 set_inferior_args_vector (int argc
, char **argv
)
243 inferior_argc
= argc
;
244 inferior_argv
= argv
;
247 /* Notice when `set args' is run. */
249 notice_args_set (char *args
, int from_tty
, struct cmd_list_element
*c
)
255 /* Notice when `show args' is run. */
257 notice_args_read (char *args
, int from_tty
, struct cmd_list_element
*c
)
259 /* Might compute the value. */
260 get_inferior_args ();
264 /* Compute command-line string given argument vector. This does the
265 same shell processing as fork_inferior. */
267 construct_inferior_arguments (struct gdbarch
*gdbarch
, int argc
, char **argv
)
271 if (STARTUP_WITH_SHELL
)
273 /* This holds all the characters considered special to the
274 typical Unix shells. We include `^' because the SunOS
275 /bin/sh treats it as a synonym for `|'. */
276 char *special
= "\"!#$&*()\\|[]{}<>?'\"`~^; \t\n";
281 /* We over-compute the size. It shouldn't matter. */
282 for (i
= 0; i
< argc
; ++i
)
283 length
+= 2 * strlen (argv
[i
]) + 1 + 2 * (argv
[i
][0] == '\0');
285 result
= (char *) xmalloc (length
);
288 for (i
= 0; i
< argc
; ++i
)
293 /* Need to handle empty arguments specially. */
294 if (argv
[i
][0] == '\0')
301 for (cp
= argv
[i
]; *cp
; ++cp
)
303 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 inferior_io_terminal
= savestring (file
, strlen (file
));
384 run_command (char *args
, int from_tty
)
390 if (! ptid_equal (inferior_ptid
, null_ptid
) && target_has_execution
)
393 && !query ("The program being debugged has been started already.\n\
394 Start it from the beginning? "))
395 error ("Program not restarted.");
397 #if defined(SOLIB_RESTART)
400 init_wait_for_inferior ();
403 clear_breakpoint_hit_counts ();
405 /* Purge old solib objfiles. */
406 objfile_purge_solibs ();
408 do_run_cleanups (NULL
);
410 /* The comment here used to read, "The exec file is re-read every
411 time we do a generic_mourn_inferior, so we just have to worry
412 about the symbol file." The `generic_mourn_inferior' function
413 gets called whenever the program exits. However, suppose the
414 program exits, and *then* the executable file changes? We need
415 to check again here. Since reopen_exec_file doesn't do anything
416 if the timestamp hasn't changed, I don't see the harm. */
420 exec_file
= (char *) get_exec_file (0);
422 /* We keep symbols from add-symbol-file, on the grounds that the
423 user might want to add some symbols before running the program
424 (right?). But sometimes (dynamic loading where the user manually
425 introduces the new symbols with add-symbol-file), the code which
426 the symbols describe does not persist between runs. Currently
427 the user has to manually nuke all symbols between runs if they
428 want them to go away (PR 2207). This is probably reasonable. */
432 if (event_loop_p
&& target_can_async_p ())
433 async_disable_stdin ();
437 int async_exec
= strip_bg_char (&args
);
439 /* If we get a request for running in the bg but the target
440 doesn't support it, error out. */
441 if (event_loop_p
&& async_exec
&& !target_can_async_p ())
442 error ("Asynchronous execution not supported on this target.");
444 /* If we don't get a request of running in the bg, then we need
445 to simulate synchronous (fg) execution. */
446 if (event_loop_p
&& !async_exec
&& target_can_async_p ())
448 /* Simulate synchronous execution */
449 async_disable_stdin ();
452 /* If there were other args, beside '&', process them. */
455 char *old_args
= set_inferior_args (xstrdup (args
));
462 ui_out_field_string (uiout
, NULL
, "Starting program");
463 ui_out_text (uiout
, ": ");
465 ui_out_field_string (uiout
, "execfile", exec_file
);
466 ui_out_spaces (uiout
, 1);
467 /* We call get_inferior_args() because we might need to compute
469 ui_out_field_string (uiout
, "infargs", get_inferior_args ());
470 ui_out_text (uiout
, "\n");
471 ui_out_flush (uiout
);
474 /* We call get_inferior_args() because we might need to compute
476 target_create_inferior (exec_file
, get_inferior_args (),
477 environ_vector (inferior_environ
));
482 run_no_args_command (char *args
, int from_tty
)
484 char *old_args
= set_inferior_args (xstrdup (""));
490 continue_command (char *proc_count_exp
, int from_tty
)
495 /* Find out whether we must run in the background. */
496 if (proc_count_exp
!= NULL
)
497 async_exec
= strip_bg_char (&proc_count_exp
);
499 /* If we must run in the background, but the target can't do it,
501 if (event_loop_p
&& async_exec
&& !target_can_async_p ())
502 error ("Asynchronous execution not supported on this target.");
504 /* If we are not asked to run in the bg, then prepare to run in the
505 foreground, synchronously. */
506 if (event_loop_p
&& !async_exec
&& target_can_async_p ())
508 /* Simulate synchronous execution */
509 async_disable_stdin ();
512 /* If have argument (besides '&'), set proceed count of breakpoint
514 if (proc_count_exp
!= NULL
)
516 bpstat bs
= stop_bpstat
;
517 int num
= bpstat_num (&bs
);
518 if (num
== 0 && from_tty
)
521 ("Not stopped at any breakpoint; argument ignored.\n");
525 set_ignore_count (num
,
526 parse_and_eval_long (proc_count_exp
) - 1,
528 /* set_ignore_count prints a message ending with a period.
529 So print two spaces before "Continuing.". */
531 printf_filtered (" ");
532 num
= bpstat_num (&bs
);
537 printf_filtered ("Continuing.\n");
539 clear_proceed_status ();
541 proceed ((CORE_ADDR
) -1, TARGET_SIGNAL_DEFAULT
, 0);
544 /* Step until outside of current statement. */
547 step_command (char *count_string
, int from_tty
)
549 step_1 (0, 0, count_string
);
552 /* Likewise, but skip over subroutine calls as if single instructions. */
555 next_command (char *count_string
, int from_tty
)
557 step_1 (1, 0, count_string
);
560 /* Likewise, but step only one instruction. */
563 stepi_command (char *count_string
, int from_tty
)
565 step_1 (0, 1, count_string
);
569 nexti_command (char *count_string
, int from_tty
)
571 step_1 (1, 1, count_string
);
575 disable_longjmp_breakpoint_cleanup (void *ignore
)
577 disable_longjmp_breakpoint ();
581 step_1 (int skip_subroutines
, int single_inst
, char *count_string
)
584 struct frame_info
*frame
;
585 struct cleanup
*cleanups
= 0;
591 async_exec
= strip_bg_char (&count_string
);
593 /* If we get a request for running in the bg but the target
594 doesn't support it, error out. */
595 if (event_loop_p
&& async_exec
&& !target_can_async_p ())
596 error ("Asynchronous execution not supported on this target.");
598 /* If we don't get a request of running in the bg, then we need
599 to simulate synchronous (fg) execution. */
600 if (event_loop_p
&& !async_exec
&& target_can_async_p ())
602 /* Simulate synchronous execution */
603 async_disable_stdin ();
606 count
= count_string
? parse_and_eval_long (count_string
) : 1;
608 if (!single_inst
|| skip_subroutines
) /* leave si command alone */
610 enable_longjmp_breakpoint ();
611 if (!event_loop_p
|| !target_can_async_p ())
612 cleanups
= make_cleanup (disable_longjmp_breakpoint_cleanup
, 0 /*ignore*/);
614 make_exec_cleanup (disable_longjmp_breakpoint_cleanup
, 0 /*ignore*/);
617 /* In synchronous case, all is well, just use the regular for loop. */
618 if (!event_loop_p
|| !target_can_async_p ())
620 for (; count
> 0; count
--)
622 clear_proceed_status ();
624 frame
= get_current_frame ();
625 if (!frame
) /* Avoid coredump here. Why tho? */
626 error ("No current frame");
627 step_frame_id
= get_frame_id (frame
);
628 step_sp
= read_sp ();
632 find_pc_line_pc_range (stop_pc
, &step_range_start
, &step_range_end
);
633 if (step_range_end
== 0)
636 if (find_pc_partial_function (stop_pc
, &name
, &step_range_start
,
637 &step_range_end
) == 0)
638 error ("Cannot find bounds of current function");
640 target_terminal_ours ();
642 Single stepping until exit from function %s, \n\
643 which has no line number information.\n", name
);
648 /* Say we are stepping, but stop after one insn whatever it does. */
649 step_range_start
= step_range_end
= 1;
650 if (!skip_subroutines
)
652 Don't step over function calls, not even to functions lacking
654 step_over_calls
= STEP_OVER_NONE
;
657 if (skip_subroutines
)
658 step_over_calls
= STEP_OVER_ALL
;
660 step_multi
= (count
> 1);
661 proceed ((CORE_ADDR
) -1, TARGET_SIGNAL_DEFAULT
, 1);
667 if (!single_inst
|| skip_subroutines
)
668 do_cleanups (cleanups
);
671 /* In case of asynchronous target things get complicated, do only
672 one step for now, before returning control to the event loop. Let
673 the continuation figure out how many other steps we need to do,
674 and handle them one at the time, through step_once(). */
677 if (event_loop_p
&& target_can_async_p ())
678 step_once (skip_subroutines
, single_inst
, count
);
682 /* Called after we are done with one step operation, to check whether
683 we need to step again, before we print the prompt and return control
684 to the user. If count is > 1, we will need to do one more call to
685 proceed(), via step_once(). Basically it is like step_once and
686 step_1_continuation are co-recursive. */
688 step_1_continuation (struct continuation_arg
*arg
)
691 int skip_subroutines
;
694 skip_subroutines
= arg
->data
.integer
;
695 single_inst
= arg
->next
->data
.integer
;
696 count
= arg
->next
->next
->data
.integer
;
699 step_once (skip_subroutines
, single_inst
, count
- 1);
701 if (!single_inst
|| skip_subroutines
)
702 do_exec_cleanups (ALL_CLEANUPS
);
705 /* Do just one step operation. If count >1 we will have to set up a
706 continuation to be done after the target stops (after this one
707 step). This is useful to implement the 'step n' kind of commands, in
708 case of asynchronous targets. We had to split step_1 into two parts,
709 one to be done before proceed() and one afterwards. This function is
710 called in case of step n with n>1, after the first step operation has
713 step_once (int skip_subroutines
, int single_inst
, int count
)
715 struct continuation_arg
*arg1
;
716 struct continuation_arg
*arg2
;
717 struct continuation_arg
*arg3
;
718 struct frame_info
*frame
;
722 clear_proceed_status ();
724 frame
= get_current_frame ();
725 if (!frame
) /* Avoid coredump here. Why tho? */
726 error ("No current frame");
727 step_frame_id
= get_frame_id (frame
);
728 step_sp
= read_sp ();
732 find_pc_line_pc_range (stop_pc
, &step_range_start
, &step_range_end
);
734 /* If we have no line info, switch to stepi mode. */
735 if (step_range_end
== 0 && step_stop_if_no_debug
)
737 step_range_start
= step_range_end
= 1;
739 else if (step_range_end
== 0)
742 if (find_pc_partial_function (stop_pc
, &name
, &step_range_start
,
743 &step_range_end
) == 0)
744 error ("Cannot find bounds of current function");
746 target_terminal_ours ();
748 Single stepping until exit from function %s, \n\
749 which has no line number information.\n", name
);
754 /* Say we are stepping, but stop after one insn whatever it does. */
755 step_range_start
= step_range_end
= 1;
756 if (!skip_subroutines
)
758 Don't step over function calls, not even to functions lacking
760 step_over_calls
= STEP_OVER_NONE
;
763 if (skip_subroutines
)
764 step_over_calls
= STEP_OVER_ALL
;
766 step_multi
= (count
> 1);
768 (struct continuation_arg
*) xmalloc (sizeof (struct continuation_arg
));
770 (struct continuation_arg
*) xmalloc (sizeof (struct continuation_arg
));
772 (struct continuation_arg
*) xmalloc (sizeof (struct continuation_arg
));
774 arg1
->data
.integer
= skip_subroutines
;
776 arg2
->data
.integer
= single_inst
;
778 arg3
->data
.integer
= count
;
779 add_intermediate_continuation (step_1_continuation
, arg1
);
780 proceed ((CORE_ADDR
) -1, TARGET_SIGNAL_DEFAULT
, 1);
785 /* Continue program at specified address. */
788 jump_command (char *arg
, int from_tty
)
791 struct symtabs_and_lines sals
;
792 struct symtab_and_line sal
;
799 /* Find out whether we must run in the background. */
801 async_exec
= strip_bg_char (&arg
);
803 /* If we must run in the background, but the target can't do it,
805 if (event_loop_p
&& async_exec
&& !target_can_async_p ())
806 error ("Asynchronous execution not supported on this target.");
808 /* If we are not asked to run in the bg, then prepare to run in the
809 foreground, synchronously. */
810 if (event_loop_p
&& !async_exec
&& target_can_async_p ())
812 /* Simulate synchronous execution */
813 async_disable_stdin ();
817 error_no_arg ("starting address");
819 sals
= decode_line_spec_1 (arg
, 1);
822 error ("Unreasonable jump request");
828 if (sal
.symtab
== 0 && sal
.pc
== 0)
829 error ("No source file has been specified.");
831 resolve_sal_pc (&sal
); /* May error out */
833 /* See if we are trying to jump to another function. */
834 fn
= get_frame_function (get_current_frame ());
835 sfn
= find_pc_function (sal
.pc
);
836 if (fn
!= NULL
&& sfn
!= fn
)
838 if (!query ("Line %d is not in `%s'. Jump anyway? ", sal
.line
,
839 SYMBOL_PRINT_NAME (fn
)))
841 error ("Not confirmed.");
848 fixup_symbol_section (sfn
, 0);
849 if (section_is_overlay (SYMBOL_BFD_SECTION (sfn
)) &&
850 !section_is_mapped (SYMBOL_BFD_SECTION (sfn
)))
852 if (!query ("WARNING!!! Destination is in unmapped overlay! Jump anyway? "))
854 error ("Not confirmed.");
864 printf_filtered ("Continuing at ");
865 print_address_numeric (addr
, 1, gdb_stdout
);
866 printf_filtered (".\n");
869 clear_proceed_status ();
870 proceed (addr
, TARGET_SIGNAL_0
, 0);
874 /* Go to line or address in current procedure */
876 go_command (char *line_no
, int from_tty
)
878 if (line_no
== (char *) NULL
|| !*line_no
)
879 printf_filtered (GO_USAGE
);
882 tbreak_command (line_no
, from_tty
);
883 jump_command (line_no
, from_tty
);
888 /* Continue program giving it specified signal. */
891 signal_command (char *signum_exp
, int from_tty
)
893 enum target_signal oursig
;
895 dont_repeat (); /* Too dangerous. */
899 error_no_arg ("signal number");
901 /* It would be even slicker to make signal names be valid expressions,
902 (the type could be "enum $signal" or some such), then the user could
903 assign them to convenience variables. */
904 oursig
= target_signal_from_name (signum_exp
);
906 if (oursig
== TARGET_SIGNAL_UNKNOWN
)
908 /* No, try numeric. */
909 int num
= parse_and_eval_long (signum_exp
);
912 oursig
= TARGET_SIGNAL_0
;
914 oursig
= target_signal_from_command (num
);
919 if (oursig
== TARGET_SIGNAL_0
)
920 printf_filtered ("Continuing with no signal.\n");
922 printf_filtered ("Continuing with signal %s.\n",
923 target_signal_to_name (oursig
));
926 clear_proceed_status ();
927 /* "signal 0" should not get stuck if we are stopped at a breakpoint.
928 FIXME: Neither should "signal foo" but when I tried passing
929 (CORE_ADDR)-1 unconditionally I got a testsuite failure which I haven't
930 tried to track down yet. */
931 proceed (oursig
== TARGET_SIGNAL_0
? (CORE_ADDR
) -1 : stop_pc
, oursig
, 0);
934 /* Proceed until we reach a different source line with pc greater than
935 our current one or exit the function. We skip calls in both cases.
937 Note that eventually this command should probably be changed so
938 that only source lines are printed out when we hit the breakpoint
939 we set. This may involve changes to wait_for_inferior and the
940 proceed status code. */
943 until_next_command (int from_tty
)
945 struct frame_info
*frame
;
948 struct symtab_and_line sal
;
950 clear_proceed_status ();
952 frame
= get_current_frame ();
954 /* Step until either exited from this function or greater
955 than the current line (if in symbolic section) or pc (if
959 func
= find_pc_function (pc
);
963 struct minimal_symbol
*msymbol
= lookup_minimal_symbol_by_pc (pc
);
966 error ("Execution is not within a known function.");
968 step_range_start
= SYMBOL_VALUE_ADDRESS (msymbol
);
973 sal
= find_pc_line (pc
, 0);
975 step_range_start
= BLOCK_START (SYMBOL_BLOCK_VALUE (func
));
976 step_range_end
= sal
.end
;
979 step_over_calls
= STEP_OVER_ALL
;
980 step_frame_id
= get_frame_id (frame
);
981 step_sp
= read_sp ();
983 step_multi
= 0; /* Only one call to proceed */
985 proceed ((CORE_ADDR
) -1, TARGET_SIGNAL_DEFAULT
, 1);
989 until_command (char *arg
, int from_tty
)
993 if (!target_has_execution
)
994 error ("The program is not running.");
996 /* Find out whether we must run in the background. */
998 async_exec
= strip_bg_char (&arg
);
1000 /* If we must run in the background, but the target can't do it,
1002 if (event_loop_p
&& async_exec
&& !target_can_async_p ())
1003 error ("Asynchronous execution not supported on this target.");
1005 /* If we are not asked to run in the bg, then prepare to run in the
1006 foreground, synchronously. */
1007 if (event_loop_p
&& !async_exec
&& target_can_async_p ())
1009 /* Simulate synchronous execution */
1010 async_disable_stdin ();
1014 until_break_command (arg
, from_tty
, 0);
1016 until_next_command (from_tty
);
1020 advance_command (char *arg
, int from_tty
)
1024 if (!target_has_execution
)
1025 error ("The program is not running.");
1028 error_no_arg ("a location");
1030 /* Find out whether we must run in the background. */
1032 async_exec
= strip_bg_char (&arg
);
1034 /* If we must run in the background, but the target can't do it,
1036 if (event_loop_p
&& async_exec
&& !target_can_async_p ())
1037 error ("Asynchronous execution not supported on this target.");
1039 /* If we are not asked to run in the bg, then prepare to run in the
1040 foreground, synchronously. */
1041 if (event_loop_p
&& !async_exec
&& target_can_async_p ())
1043 /* Simulate synchronous execution. */
1044 async_disable_stdin ();
1047 until_break_command (arg
, from_tty
, 1);
1051 static struct value
*
1052 legacy_return_value (int struct_return
, struct type
*value_type
)
1054 struct value
*value
;
1058 /* The return value can be found in the inferior's registers. */
1059 return register_value_being_returned (value_type
, stop_registers
);
1062 if (DEPRECATED_EXTRACT_STRUCT_VALUE_ADDRESS_P ())
1066 addr
= DEPRECATED_EXTRACT_STRUCT_VALUE_ADDRESS (stop_registers
);
1068 error ("Function return value unknown.");
1069 return value_at (value_type
, addr
, NULL
);
1072 /* It is "struct return" yet the value is being extracted,
1073 presumably from registers, using EXTRACT_RETURN_VALUE. This
1074 doesn't make sense. Unfortunately, the legacy interfaces allowed
1075 this behavior. Sigh! */
1076 value
= allocate_value (value_type
);
1077 CHECK_TYPEDEF (value_type
);
1078 /* If the function returns void, don't bother fetching the return
1080 EXTRACT_RETURN_VALUE (value_type
, stop_registers
,
1081 VALUE_CONTENTS_RAW (value
));
1085 /* Print the result of a function at the end of a 'finish' command. */
1088 print_return_value (int struct_return
, struct type
*value_type
)
1090 struct gdbarch
*gdbarch
= current_gdbarch
;
1091 struct cleanup
*old_chain
;
1092 struct ui_stream
*stb
;
1093 struct value
*value
= NULL
;
1095 /* FIXME: 2003-09-27: When returning from a nested inferior function
1096 call, it's possible (with no help from the architecture vector)
1097 to locate and return/print a "struct return" value. This is just
1098 a more complicated case of what is already being done in in the
1099 inferior function call code. In fact, when inferior function
1100 calls are made async, this will likely be made the norm. */
1102 if (gdbarch_return_value_p (gdbarch
))
1104 switch (gdbarch_return_value (gdbarch
, value_type
, NULL
, NULL
, NULL
))
1106 case RETURN_VALUE_REGISTER_CONVENTION
:
1107 case RETURN_VALUE_ABI_RETURNS_ADDRESS
:
1108 value
= allocate_value (value_type
);
1109 CHECK_TYPEDEF (value_type
);
1110 gdbarch_return_value (current_gdbarch
, value_type
, stop_registers
,
1111 VALUE_CONTENTS_RAW (value
), NULL
);
1114 case RETURN_VALUE_STRUCT_CONVENTION
:
1119 value
= legacy_return_value (struct_return
, value_type
);
1124 stb
= ui_out_stream_new (uiout
);
1125 old_chain
= make_cleanup_ui_out_stream_delete (stb
);
1126 ui_out_text (uiout
, "Value returned is ");
1127 ui_out_field_fmt (uiout
, "gdb-result-var", "$%d",
1128 record_latest_value (value
));
1129 ui_out_text (uiout
, " = ");
1130 value_print (value
, stb
->stream
, 0, Val_no_prettyprint
);
1131 ui_out_field_stream (uiout
, "return-value", stb
);
1132 ui_out_text (uiout
, "\n");
1133 do_cleanups (old_chain
);
1137 ui_out_text (uiout
, "Value returned has type: ");
1138 ui_out_field_string (uiout
, "return-type", TYPE_NAME (value_type
));
1139 ui_out_text (uiout
, ".");
1140 ui_out_text (uiout
, " Cannot determine contents\n");
1144 /* Stuff that needs to be done by the finish command after the target
1145 has stopped. In asynchronous mode, we wait for the target to stop
1146 in the call to poll or select in the event loop, so it is
1147 impossible to do all the stuff as part of the finish_command
1148 function itself. The only chance we have to complete this command
1149 is in fetch_inferior_event, which is called by the event loop as
1150 soon as it detects that the target has stopped. This function is
1151 called via the cmd_continuation pointer. */
1154 finish_command_continuation (struct continuation_arg
*arg
)
1156 struct symbol
*function
;
1157 struct breakpoint
*breakpoint
;
1158 struct cleanup
*cleanups
;
1160 breakpoint
= (struct breakpoint
*) arg
->data
.pointer
;
1161 function
= (struct symbol
*) arg
->next
->data
.pointer
;
1162 cleanups
= (struct cleanup
*) arg
->next
->next
->data
.pointer
;
1164 if (bpstat_find_breakpoint (stop_bpstat
, breakpoint
) != NULL
1165 && function
!= NULL
)
1167 struct type
*value_type
;
1171 value_type
= TYPE_TARGET_TYPE (SYMBOL_TYPE (function
));
1173 internal_error (__FILE__
, __LINE__
,
1174 "finish_command: function has no target type");
1176 if (TYPE_CODE (value_type
) == TYPE_CODE_VOID
)
1178 do_exec_cleanups (cleanups
);
1182 CHECK_TYPEDEF (value_type
);
1183 gcc_compiled
= BLOCK_GCC_COMPILED (SYMBOL_BLOCK_VALUE (function
));
1184 struct_return
= using_struct_return (value_type
, gcc_compiled
);
1186 print_return_value (struct_return
, value_type
);
1189 do_exec_cleanups (cleanups
);
1192 /* "finish": Set a temporary breakpoint at the place the selected
1193 frame will return to, then continue. */
1196 finish_command (char *arg
, int from_tty
)
1198 struct symtab_and_line sal
;
1199 struct frame_info
*frame
;
1200 struct symbol
*function
;
1201 struct breakpoint
*breakpoint
;
1202 struct cleanup
*old_chain
;
1203 struct continuation_arg
*arg1
, *arg2
, *arg3
;
1207 /* Find out whether we must run in the background. */
1209 async_exec
= strip_bg_char (&arg
);
1211 /* If we must run in the background, but the target can't do it,
1213 if (event_loop_p
&& async_exec
&& !target_can_async_p ())
1214 error ("Asynchronous execution not supported on this target.");
1216 /* If we are not asked to run in the bg, then prepare to run in the
1217 foreground, synchronously. */
1218 if (event_loop_p
&& !async_exec
&& target_can_async_p ())
1220 /* Simulate synchronous execution. */
1221 async_disable_stdin ();
1225 error ("The \"finish\" command does not take any arguments.");
1226 if (!target_has_execution
)
1227 error ("The program is not running.");
1228 if (deprecated_selected_frame
== NULL
)
1229 error ("No selected frame.");
1231 frame
= get_prev_frame (deprecated_selected_frame
);
1233 error ("\"finish\" not meaningful in the outermost frame.");
1235 clear_proceed_status ();
1237 sal
= find_pc_line (get_frame_pc (frame
), 0);
1238 sal
.pc
= get_frame_pc (frame
);
1240 breakpoint
= set_momentary_breakpoint (sal
, get_frame_id (frame
), bp_finish
);
1242 if (!event_loop_p
|| !target_can_async_p ())
1243 old_chain
= make_cleanup_delete_breakpoint (breakpoint
);
1245 old_chain
= make_exec_cleanup_delete_breakpoint (breakpoint
);
1247 /* Find the function we will return from. */
1249 function
= find_pc_function (get_frame_pc (deprecated_selected_frame
));
1251 /* Print info on the selected frame, including level number but not
1255 printf_filtered ("Run till exit from ");
1256 print_stack_frame (get_selected_frame (), 1, LOCATION
);
1259 /* If running asynchronously and the target support asynchronous
1260 execution, set things up for the rest of the finish command to be
1261 completed later on, when gdb has detected that the target has
1262 stopped, in fetch_inferior_event. */
1263 if (event_loop_p
&& target_can_async_p ())
1266 (struct continuation_arg
*) xmalloc (sizeof (struct continuation_arg
));
1268 (struct continuation_arg
*) xmalloc (sizeof (struct continuation_arg
));
1270 (struct continuation_arg
*) xmalloc (sizeof (struct continuation_arg
));
1274 arg1
->data
.pointer
= breakpoint
;
1275 arg2
->data
.pointer
= function
;
1276 arg3
->data
.pointer
= old_chain
;
1277 add_continuation (finish_command_continuation
, arg1
);
1280 proceed_to_finish
= 1; /* We want stop_registers, please... */
1281 proceed ((CORE_ADDR
) -1, TARGET_SIGNAL_DEFAULT
, 0);
1283 /* Do this only if not running asynchronously or if the target
1284 cannot do async execution. Otherwise, complete this command when
1285 the target actually stops, in fetch_inferior_event. */
1286 if (!event_loop_p
|| !target_can_async_p ())
1288 /* Did we stop at our breakpoint? */
1289 if (bpstat_find_breakpoint (stop_bpstat
, breakpoint
) != NULL
1290 && function
!= NULL
)
1292 struct type
*value_type
;
1296 value_type
= TYPE_TARGET_TYPE (SYMBOL_TYPE (function
));
1298 internal_error (__FILE__
, __LINE__
,
1299 "finish_command: function has no target type");
1301 /* FIXME: Shouldn't we do the cleanups before returning? */
1302 if (TYPE_CODE (value_type
) == TYPE_CODE_VOID
)
1305 CHECK_TYPEDEF (value_type
);
1306 gcc_compiled
= BLOCK_GCC_COMPILED (SYMBOL_BLOCK_VALUE (function
));
1307 struct_return
= using_struct_return (value_type
, gcc_compiled
);
1309 print_return_value (struct_return
, value_type
);
1312 do_cleanups (old_chain
);
1318 program_info (char *args
, int from_tty
)
1320 bpstat bs
= stop_bpstat
;
1321 int num
= bpstat_num (&bs
);
1323 if (!target_has_execution
)
1325 printf_filtered ("The program being debugged is not being run.\n");
1329 target_files_info ();
1330 printf_filtered ("Program stopped at %s.\n",
1331 local_hex_string ((unsigned long) stop_pc
));
1333 printf_filtered ("It stopped after being stepped.\n");
1336 /* There may be several breakpoints in the same place, so this
1337 isn't as strange as it seems. */
1342 printf_filtered ("It stopped at a breakpoint that has ");
1343 printf_filtered ("since been deleted.\n");
1346 printf_filtered ("It stopped at breakpoint %d.\n", num
);
1347 num
= bpstat_num (&bs
);
1350 else if (stop_signal
!= TARGET_SIGNAL_0
)
1352 printf_filtered ("It stopped with signal %s, %s.\n",
1353 target_signal_to_name (stop_signal
),
1354 target_signal_to_string (stop_signal
));
1359 printf_filtered ("Type \"info stack\" or \"info registers\" ");
1360 printf_filtered ("for more information.\n");
1365 environment_info (char *var
, int from_tty
)
1369 char *val
= get_in_environ (inferior_environ
, var
);
1372 puts_filtered (var
);
1373 puts_filtered (" = ");
1374 puts_filtered (val
);
1375 puts_filtered ("\n");
1379 puts_filtered ("Environment variable \"");
1380 puts_filtered (var
);
1381 puts_filtered ("\" not defined.\n");
1386 char **vector
= environ_vector (inferior_environ
);
1389 puts_filtered (*vector
++);
1390 puts_filtered ("\n");
1396 set_environment_command (char *arg
, int from_tty
)
1398 char *p
, *val
, *var
;
1402 error_no_arg ("environment variable and value");
1404 /* Find seperation between variable name and value */
1405 p
= (char *) strchr (arg
, '=');
1406 val
= (char *) strchr (arg
, ' ');
1408 if (p
!= 0 && val
!= 0)
1410 /* We have both a space and an equals. If the space is before the
1411 equals, walk forward over the spaces til we see a nonspace
1412 (possibly the equals). */
1417 /* Now if the = is after the char following the spaces,
1418 take the char following the spaces. */
1422 else if (val
!= 0 && p
== 0)
1426 error_no_arg ("environment variable to set");
1428 if (p
== 0 || p
[1] == 0)
1432 p
= arg
+ strlen (arg
); /* So that savestring below will work */
1436 /* Not setting variable value to null */
1438 while (*val
== ' ' || *val
== '\t')
1442 while (p
!= arg
&& (p
[-1] == ' ' || p
[-1] == '\t'))
1445 var
= savestring (arg
, p
- arg
);
1448 printf_filtered ("Setting environment variable ");
1449 printf_filtered ("\"%s\" to null value.\n", var
);
1450 set_in_environ (inferior_environ
, var
, "");
1453 set_in_environ (inferior_environ
, var
, val
);
1458 unset_environment_command (char *var
, int from_tty
)
1462 /* If there is no argument, delete all environment variables.
1463 Ask for confirmation if reading from the terminal. */
1464 if (!from_tty
|| query ("Delete all environment variables? "))
1466 free_environ (inferior_environ
);
1467 inferior_environ
= make_environ ();
1471 unset_in_environ (inferior_environ
, var
);
1474 /* Handle the execution path (PATH variable) */
1476 static const char path_var_name
[] = "PATH";
1479 path_info (char *args
, int from_tty
)
1481 puts_filtered ("Executable and object file path: ");
1482 puts_filtered (get_in_environ (inferior_environ
, path_var_name
));
1483 puts_filtered ("\n");
1486 /* Add zero or more directories to the front of the execution path. */
1489 path_command (char *dirname
, int from_tty
)
1494 env
= get_in_environ (inferior_environ
, path_var_name
);
1495 /* Can be null if path is not set */
1498 exec_path
= xstrdup (env
);
1499 mod_path (dirname
, &exec_path
);
1500 set_in_environ (inferior_environ
, path_var_name
, exec_path
);
1503 path_info ((char *) NULL
, from_tty
);
1507 /* Print out the machine register regnum. If regnum is -1, print all
1508 registers (print_all == 1) or all non-float and non-vector
1509 registers (print_all == 0).
1511 For most machines, having all_registers_info() print the
1512 register(s) one per line is good enough. If a different format is
1513 required, (eg, for MIPS or Pyramid 90x, which both have lots of
1514 regs), or there is an existing convention for showing all the
1515 registers, define the architecture method PRINT_REGISTERS_INFO to
1516 provide that format. */
1519 default_print_registers_info (struct gdbarch
*gdbarch
,
1520 struct ui_file
*file
,
1521 struct frame_info
*frame
,
1522 int regnum
, int print_all
)
1525 const int numregs
= NUM_REGS
+ NUM_PSEUDO_REGS
;
1526 char raw_buffer
[MAX_REGISTER_SIZE
];
1527 char virtual_buffer
[MAX_REGISTER_SIZE
];
1529 if (DEPRECATED_DO_REGISTERS_INFO_P ())
1531 DEPRECATED_DO_REGISTERS_INFO (regnum
, print_all
);
1535 for (i
= 0; i
< numregs
; i
++)
1537 /* Decide between printing all regs, non-float / vector regs, or
1543 if (!gdbarch_register_reggroup_p (gdbarch
, i
, all_reggroup
))
1548 if (!gdbarch_register_reggroup_p (gdbarch
, i
, general_reggroup
))
1558 /* If the register name is empty, it is undefined for this
1559 processor, so don't display anything. */
1560 if (REGISTER_NAME (i
) == NULL
|| *(REGISTER_NAME (i
)) == '\0')
1563 fputs_filtered (REGISTER_NAME (i
), file
);
1564 print_spaces_filtered (15 - strlen (REGISTER_NAME (i
)), file
);
1566 /* Get the data in raw format. */
1567 if (! frame_register_read (frame
, i
, raw_buffer
))
1569 fprintf_filtered (file
, "*value not available*\n");
1573 /* FIXME: cagney/2002-08-03: This code shouldn't be necessary.
1574 The function frame_register_read() should have returned the
1575 pre-cooked register so no conversion is necessary. */
1576 /* Convert raw data to virtual format if necessary. */
1577 if (DEPRECATED_REGISTER_CONVERTIBLE_P ()
1578 && DEPRECATED_REGISTER_CONVERTIBLE (i
))
1580 DEPRECATED_REGISTER_CONVERT_TO_VIRTUAL (i
, register_type (current_gdbarch
, i
),
1581 raw_buffer
, virtual_buffer
);
1585 memcpy (virtual_buffer
, raw_buffer
,
1586 DEPRECATED_REGISTER_VIRTUAL_SIZE (i
));
1589 /* If virtual format is floating, print it that way, and in raw
1591 if (TYPE_CODE (register_type (current_gdbarch
, i
)) == TYPE_CODE_FLT
)
1595 val_print (register_type (current_gdbarch
, i
), virtual_buffer
, 0, 0,
1596 file
, 0, 1, 0, Val_pretty_default
);
1598 fprintf_filtered (file
, "\t(raw 0x");
1599 for (j
= 0; j
< DEPRECATED_REGISTER_RAW_SIZE (i
); j
++)
1602 if (TARGET_BYTE_ORDER
== BFD_ENDIAN_BIG
)
1605 idx
= DEPRECATED_REGISTER_RAW_SIZE (i
) - 1 - j
;
1606 fprintf_filtered (file
, "%02x", (unsigned char) raw_buffer
[idx
]);
1608 fprintf_filtered (file
, ")");
1612 /* Print the register in hex. */
1613 val_print (register_type (current_gdbarch
, i
), virtual_buffer
, 0, 0,
1614 file
, 'x', 1, 0, Val_pretty_default
);
1615 /* If not a vector register, print it also according to its
1617 if (TYPE_VECTOR (register_type (current_gdbarch
, i
)) == 0)
1619 fprintf_filtered (file
, "\t");
1620 val_print (register_type (current_gdbarch
, i
), virtual_buffer
, 0, 0,
1621 file
, 0, 1, 0, Val_pretty_default
);
1625 fprintf_filtered (file
, "\n");
1630 registers_info (char *addr_exp
, int fpregs
)
1632 int regnum
, numregs
;
1635 if (!target_has_registers
)
1636 error ("The program has no registers now.");
1637 if (deprecated_selected_frame
== NULL
)
1638 error ("No selected frame.");
1642 gdbarch_print_registers_info (current_gdbarch
, gdb_stdout
,
1643 deprecated_selected_frame
, -1, fpregs
);
1647 while (*addr_exp
!= '\0')
1652 /* Keep skipping leading white space. */
1653 if (isspace ((*addr_exp
)))
1659 /* Discard any leading ``$''. Check that there is something
1660 resembling a register following it. */
1661 if (addr_exp
[0] == '$')
1663 if (isspace ((*addr_exp
)) || (*addr_exp
) == '\0')
1664 error ("Missing register name");
1666 /* Find the start/end of this register name/num/group. */
1668 while ((*addr_exp
) != '\0' && !isspace ((*addr_exp
)))
1672 /* Figure out what we've found and display it. */
1674 /* A register name? */
1676 int regnum
= frame_map_name_to_regnum (deprecated_selected_frame
,
1677 start
, end
- start
);
1680 gdbarch_print_registers_info (current_gdbarch
, gdb_stdout
,
1681 deprecated_selected_frame
, regnum
, fpregs
);
1686 /* A register number? (how portable is this one?). */
1689 int regnum
= strtol (start
, &endptr
, 0);
1692 && regnum
< NUM_REGS
+ NUM_PSEUDO_REGS
)
1694 gdbarch_print_registers_info (current_gdbarch
, gdb_stdout
,
1695 deprecated_selected_frame
, regnum
, fpregs
);
1700 /* A register group? */
1702 struct reggroup
*group
;
1703 for (group
= reggroup_next (current_gdbarch
, NULL
);
1705 group
= reggroup_next (current_gdbarch
, group
))
1707 /* Don't bother with a length check. Should the user
1708 enter a short register group name, go with the first
1709 group that matches. */
1710 if (strncmp (start
, reggroup_name (group
), end
- start
) == 0)
1716 for (regnum
= 0; regnum
< NUM_REGS
+ NUM_PSEUDO_REGS
; regnum
++)
1718 if (gdbarch_register_reggroup_p (current_gdbarch
, regnum
,
1720 gdbarch_print_registers_info (current_gdbarch
,
1721 gdb_stdout
, deprecated_selected_frame
,
1728 /* Nothing matched. */
1729 error ("Invalid register `%.*s'", (int) (end
- start
), start
);
1734 all_registers_info (char *addr_exp
, int from_tty
)
1736 registers_info (addr_exp
, 1);
1740 nofp_registers_info (char *addr_exp
, int from_tty
)
1742 registers_info (addr_exp
, 0);
1746 print_vector_info (struct gdbarch
*gdbarch
, struct ui_file
*file
,
1747 struct frame_info
*frame
, const char *args
)
1749 if (!target_has_registers
)
1750 error ("The program has no registers now.");
1751 if (deprecated_selected_frame
== NULL
)
1752 error ("No selected frame.");
1754 if (gdbarch_print_vector_info_p (gdbarch
))
1755 gdbarch_print_vector_info (gdbarch
, file
, frame
, args
);
1759 int printed_something
= 0;
1761 for (regnum
= 0; regnum
< NUM_REGS
+ NUM_PSEUDO_REGS
; regnum
++)
1763 if (gdbarch_register_reggroup_p (gdbarch
, regnum
, vector_reggroup
))
1765 printed_something
= 1;
1766 gdbarch_print_registers_info (gdbarch
, file
, frame
, regnum
, 1);
1769 if (!printed_something
)
1770 fprintf_filtered (file
, "No vector information\n");
1775 vector_info (char *args
, int from_tty
)
1777 print_vector_info (current_gdbarch
, gdb_stdout
, deprecated_selected_frame
, args
);
1783 * Should save/restore the tty state since it might be that the
1784 * program to be debugged was started on this tty and it wants
1785 * the tty in some state other than what we want. If it's running
1786 * on another terminal or without a terminal, then saving and
1787 * restoring the tty state is a harmless no-op.
1788 * This only needs to be done if we are attaching to a process.
1793 takes a program started up outside of gdb and ``attaches'' to it.
1794 This stops it cold in its tracks and allows us to start debugging it.
1795 and wait for the trace-trap that results from attaching. */
1798 attach_command (char *args
, int from_tty
)
1801 char *full_exec_path
= NULL
;
1803 dont_repeat (); /* Not for the faint of heart */
1805 if (target_has_execution
)
1807 if (query ("A program is being debugged already. Kill it? "))
1810 error ("Not killed.");
1813 target_attach (args
, from_tty
);
1815 /* Set up the "saved terminal modes" of the inferior
1816 based on what modes we are starting it with. */
1817 target_terminal_init ();
1819 /* Install inferior's terminal modes. */
1820 target_terminal_inferior ();
1822 /* Set up execution context to know that we should return from
1823 wait_for_inferior as soon as the target reports a stop. */
1824 init_wait_for_inferior ();
1825 clear_proceed_status ();
1827 /* No traps are generated when attaching to inferior under Mach 3
1829 #ifndef ATTACH_NO_WAIT
1830 /* Careful here. See comments in inferior.h. Basically some OSes
1831 don't ignore SIGSTOPs on continue requests anymore. We need a
1832 way for handle_inferior_event to reset the stop_signal variable
1833 after an attach, and this is what STOP_QUIETLY_NO_SIGSTOP is for. */
1834 stop_soon
= STOP_QUIETLY_NO_SIGSTOP
;
1835 wait_for_inferior ();
1836 stop_soon
= NO_STOP_QUIETLY
;
1840 * If no exec file is yet known, try to determine it from the
1843 exec_file
= (char *) get_exec_file (0);
1846 exec_file
= target_pid_to_exec_file (PIDGET (inferior_ptid
));
1849 /* It's possible we don't have a full path, but rather just a
1850 filename. Some targets, such as HP-UX, don't provide the
1853 Attempt to qualify the filename against the source path.
1854 (If that fails, we'll just fall back on the original
1855 filename. Not much more we can do...)
1857 if (!source_full_path_of (exec_file
, &full_exec_path
))
1858 full_exec_path
= savestring (exec_file
, strlen (exec_file
));
1860 exec_file_attach (full_exec_path
, from_tty
);
1861 symbol_file_add_main (full_exec_path
, from_tty
);
1866 reopen_exec_file ();
1871 /* Add shared library symbols from the newly attached process, if any. */
1872 SOLIB_ADD ((char *) 0, from_tty
, ¤t_target
, auto_solib_add
);
1873 re_enable_breakpoints_in_shlibs ();
1876 /* Take any necessary post-attaching actions for this platform.
1878 target_post_attach (PIDGET (inferior_ptid
));
1882 if (deprecated_attach_hook
)
1883 deprecated_attach_hook ();
1888 * takes a program previously attached to and detaches it.
1889 * The program resumes execution and will no longer stop
1890 * on signals, etc. We better not have left any breakpoints
1891 * in the program or it'll die when it hits one. For this
1892 * to work, it may be necessary for the process to have been
1893 * previously attached. It *might* work if the program was
1894 * started via the normal ptrace (PTRACE_TRACEME).
1898 detach_command (char *args
, int from_tty
)
1900 dont_repeat (); /* Not for the faint of heart */
1901 target_detach (args
, from_tty
);
1902 #if defined(SOLIB_RESTART)
1905 if (deprecated_detach_hook
)
1906 deprecated_detach_hook ();
1909 /* Disconnect from the current target without resuming it (leaving it
1910 waiting for a debugger).
1912 We'd better not have left any breakpoints in the program or the
1913 next debugger will get confused. Currently only supported for some
1914 remote targets, since the normal attach mechanisms don't work on
1915 stopped processes on some native platforms (e.g. GNU/Linux). */
1918 disconnect_command (char *args
, int from_tty
)
1920 dont_repeat (); /* Not for the faint of heart */
1921 target_disconnect (args
, from_tty
);
1922 #if defined(SOLIB_RESTART)
1925 if (deprecated_detach_hook
)
1926 deprecated_detach_hook ();
1929 /* Stop the execution of the target while running in async mode, in
1932 interrupt_target_command (char *args
, int from_tty
)
1934 if (event_loop_p
&& target_can_async_p ())
1936 dont_repeat (); /* Not for the faint of heart */
1942 print_float_info (struct gdbarch
*gdbarch
, struct ui_file
*file
,
1943 struct frame_info
*frame
, const char *args
)
1945 if (!target_has_registers
)
1946 error ("The program has no registers now.");
1947 if (deprecated_selected_frame
== NULL
)
1948 error ("No selected frame.");
1950 if (gdbarch_print_float_info_p (gdbarch
))
1951 gdbarch_print_float_info (gdbarch
, file
, frame
, args
);
1955 int printed_something
= 0;
1957 for (regnum
= 0; regnum
< NUM_REGS
+ NUM_PSEUDO_REGS
; regnum
++)
1959 if (gdbarch_register_reggroup_p (gdbarch
, regnum
, float_reggroup
))
1961 printed_something
= 1;
1962 gdbarch_print_registers_info (gdbarch
, file
, frame
, regnum
, 1);
1965 if (!printed_something
)
1966 fprintf_filtered (file
, "\
1967 No floating-point info available for this processor.\n");
1972 float_info (char *args
, int from_tty
)
1974 print_float_info (current_gdbarch
, gdb_stdout
, deprecated_selected_frame
, args
);
1978 unset_command (char *args
, int from_tty
)
1980 printf_filtered ("\"unset\" must be followed by the name of ");
1981 printf_filtered ("an unset subcommand.\n");
1982 help_list (unsetlist
, "unset ", -1, gdb_stdout
);
1986 _initialize_infcmd (void)
1988 struct cmd_list_element
*c
;
1990 c
= add_com ("tty", class_run
, tty_command
,
1991 "Set terminal for future runs of program being debugged.");
1992 set_cmd_completer (c
, filename_completer
);
1994 c
= add_set_cmd ("args", class_run
, var_string_noescape
,
1995 (char *) &inferior_args
,
1996 "Set argument list to give program being debugged when it is started.\n\
1997 Follow this command with any number of args, to be passed to the program.",
1999 set_cmd_completer (c
, filename_completer
);
2000 set_cmd_sfunc (c
, notice_args_set
);
2001 c
= add_show_from_set (c
, &showlist
);
2002 set_cmd_sfunc (c
, notice_args_read
);
2005 ("environment", no_class
, environment_info
,
2006 "The environment to give the program, or one variable's value.\n\
2007 With an argument VAR, prints the value of environment variable VAR to\n\
2008 give the program being debugged. With no arguments, prints the entire\n\
2009 environment to be given to the program.", &showlist
);
2010 set_cmd_completer (c
, noop_completer
);
2012 add_prefix_cmd ("unset", no_class
, unset_command
,
2013 "Complement to certain \"set\" commands.",
2014 &unsetlist
, "unset ", 0, &cmdlist
);
2016 c
= add_cmd ("environment", class_run
, unset_environment_command
,
2017 "Cancel environment variable VAR for the program.\n\
2018 This does not affect the program until the next \"run\" command.",
2020 set_cmd_completer (c
, noop_completer
);
2022 c
= add_cmd ("environment", class_run
, set_environment_command
,
2023 "Set environment variable value to give the program.\n\
2024 Arguments are VAR VALUE where VAR is variable name and VALUE is value.\n\
2025 VALUES of environment variables are uninterpreted strings.\n\
2026 This does not affect the program until the next \"run\" command.",
2028 set_cmd_completer (c
, noop_completer
);
2030 c
= add_com ("path", class_files
, path_command
,
2031 "Add directory DIR(s) to beginning of search path for object files.\n\
2032 $cwd in the path means the current working directory.\n\
2033 This path is equivalent to the $PATH shell variable. It is a list of\n\
2034 directories, separated by colons. These directories are searched to find\n\
2035 fully linked executable files and separately compiled object files as needed.");
2036 set_cmd_completer (c
, filename_completer
);
2038 c
= add_cmd ("paths", no_class
, path_info
,
2039 "Current search path for finding object files.\n\
2040 $cwd in the path means the current working directory.\n\
2041 This path is equivalent to the $PATH shell variable. It is a list of\n\
2042 directories, separated by colons. These directories are searched to find\n\
2043 fully linked executable files and separately compiled object files as needed.",
2045 set_cmd_completer (c
, noop_completer
);
2047 add_com ("attach", class_run
, attach_command
,
2048 "Attach to a process or file outside of GDB.\n\
2049 This command attaches to another target, of the same type as your last\n\
2050 \"target\" command (\"info files\" will show your target stack).\n\
2051 The command may take as argument a process id or a device file.\n\
2052 For a process id, you must have permission to send the process a signal,\n\
2053 and it must have the same effective uid as the debugger.\n\
2054 When using \"attach\" with a process id, the debugger finds the\n\
2055 program running in the process, looking first in the current working\n\
2056 directory, or (if not found there) using the source file search path\n\
2057 (see the \"directory\" command). You can also use the \"file\" command\n\
2058 to specify the program, and to load its symbol table.");
2060 add_com ("detach", class_run
, detach_command
,
2061 "Detach a process or file previously attached.\n\
2062 If a process, it is no longer traced, and it continues its execution. If\n\
2063 you were debugging a file, the file is closed and gdb no longer accesses it.");
2065 add_com ("disconnect", class_run
, disconnect_command
,
2066 "Disconnect from a target.\n\
2067 The target will wait for another debugger to connect. Not available for\n\
2070 add_com ("signal", class_run
, signal_command
,
2071 "Continue program giving it signal specified by the argument.\n\
2072 An argument of \"0\" means continue program without giving it a signal.");
2074 add_com ("stepi", class_run
, stepi_command
,
2075 "Step one instruction exactly.\n\
2076 Argument N means do this N times (or till program stops for another reason).");
2077 add_com_alias ("si", "stepi", class_alias
, 0);
2079 add_com ("nexti", class_run
, nexti_command
,
2080 "Step one instruction, but proceed through subroutine calls.\n\
2081 Argument N means do this N times (or till program stops for another reason).");
2082 add_com_alias ("ni", "nexti", class_alias
, 0);
2084 add_com ("finish", class_run
, finish_command
,
2085 "Execute until selected stack frame returns.\n\
2086 Upon return, the value returned is printed and put in the value history.");
2088 add_com ("next", class_run
, next_command
,
2089 "Step program, proceeding through subroutine calls.\n\
2090 Like the \"step\" command as long as subroutine calls do not happen;\n\
2091 when they do, the call is treated as one instruction.\n\
2092 Argument N means do this N times (or till program stops for another reason).");
2093 add_com_alias ("n", "next", class_run
, 1);
2095 add_com_alias ("S", "next", class_run
, 1);
2097 add_com ("step", class_run
, step_command
,
2098 "Step program until it reaches a different source line.\n\
2099 Argument N means do this N times (or till program stops for another reason).");
2100 add_com_alias ("s", "step", class_run
, 1);
2102 c
= add_com ("until", class_run
, until_command
,
2103 "Execute until the program reaches a source line greater than the current\n\
2104 or a specified location (same args as break command) within the current frame.");
2105 set_cmd_completer (c
, location_completer
);
2106 add_com_alias ("u", "until", class_run
, 1);
2108 c
= add_com ("advance", class_run
, advance_command
,
2109 "Continue the program up to the given location (same form as args for break command).\n\
2110 Execution will also stop upon exit from the current stack frame.");
2111 set_cmd_completer (c
, location_completer
);
2113 c
= add_com ("jump", class_run
, jump_command
,
2114 "Continue program being debugged at specified line or address.\n\
2115 Give as argument either LINENUM or *ADDR, where ADDR is an expression\n\
2116 for an address to start at.");
2117 set_cmd_completer (c
, location_completer
);
2121 c
= add_com ("go", class_run
, go_command
,
2122 "Usage: go <location>\n\
2123 Continue program being debugged, stopping at specified line or \n\
2125 Give as argument either LINENUM or *ADDR, where ADDR is an \n\
2126 expression for an address to start at.\n\
2127 This command is a combination of tbreak and jump.");
2128 set_cmd_completer (c
, location_completer
);
2132 add_com_alias ("g", "go", class_run
, 1);
2134 add_com ("continue", class_run
, continue_command
,
2135 "Continue program being debugged, after signal or breakpoint.\n\
2136 If proceeding from breakpoint, a number N may be used as an argument,\n\
2137 which means to set the ignore count of that breakpoint to N - 1 (so that\n\
2138 the breakpoint won't break until the Nth time it is reached).");
2139 add_com_alias ("c", "cont", class_run
, 1);
2140 add_com_alias ("fg", "cont", class_run
, 1);
2142 c
= add_com ("run", class_run
, run_command
,
2143 "Start debugged program. You may specify arguments to give it.\n\
2144 Args may include \"*\", or \"[...]\"; they are expanded using \"sh\".\n\
2145 Input and output redirection with \">\", \"<\", or \">>\" are also allowed.\n\n\
2146 With no arguments, uses arguments last specified (with \"run\" or \"set args\").\n\
2147 To cancel previous arguments and run with no arguments,\n\
2148 use \"set args\" without arguments.");
2149 set_cmd_completer (c
, filename_completer
);
2150 add_com_alias ("r", "run", class_run
, 1);
2152 add_com ("R", class_run
, run_no_args_command
,
2153 "Start debugged program with no arguments.");
2155 add_com ("interrupt", class_run
, interrupt_target_command
,
2156 "Interrupt the execution of the debugged program.");
2158 add_info ("registers", nofp_registers_info
,
2159 "List of integer registers and their contents, for selected stack frame.\n\
2160 Register name as argument means describe only that register.");
2161 add_info_alias ("r", "registers", 1);
2164 add_com ("lr", class_info
, nofp_registers_info
,
2165 "List of integer registers and their contents, for selected stack frame.\n\
2166 Register name as argument means describe only that register.");
2167 add_info ("all-registers", all_registers_info
,
2168 "List of all registers and their contents, for selected stack frame.\n\
2169 Register name as argument means describe only that register.");
2171 add_info ("program", program_info
,
2172 "Execution status of the program.");
2174 add_info ("float", float_info
,
2175 "Print the status of the floating point unit\n");
2177 add_info ("vector", vector_info
,
2178 "Print the status of the vector unit\n");
2180 inferior_environ
= make_environ ();
2181 init_environ (inferior_environ
);