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. */
193 enum step_over_calls_kind step_over_calls
;
195 /* If stepping, nonzero means step count is > 1
196 so don't print frame next time inferior stops
197 if it stops due to stepping. */
201 /* Environment to use for running inferior,
202 in format described in environ.h. */
204 struct environ
*inferior_environ
;
206 /* Accessor routines. */
209 get_inferior_args (void)
211 if (inferior_argc
!= 0)
215 n
= gdbarch_construct_inferior_arguments (current_gdbarch
,
216 inferior_argc
, inferior_argv
);
217 old
= set_inferior_args (n
);
221 if (inferior_args
== NULL
)
222 inferior_args
= xstrdup ("");
224 return inferior_args
;
228 set_inferior_args (char *newargs
)
230 char *saved_args
= inferior_args
;
232 inferior_args
= newargs
;
240 set_inferior_args_vector (int argc
, char **argv
)
242 inferior_argc
= argc
;
243 inferior_argv
= argv
;
246 /* Notice when `set args' is run. */
248 notice_args_set (char *args
, int from_tty
, struct cmd_list_element
*c
)
254 /* Notice when `show args' is run. */
256 notice_args_read (char *args
, int from_tty
, struct cmd_list_element
*c
)
258 /* Might compute the value. */
259 get_inferior_args ();
263 /* Compute command-line string given argument vector. This does the
264 same shell processing as fork_inferior. */
266 construct_inferior_arguments (struct gdbarch
*gdbarch
, int argc
, char **argv
)
270 if (STARTUP_WITH_SHELL
)
272 /* This holds all the characters considered special to the
273 typical Unix shells. We include `^' because the SunOS
274 /bin/sh treats it as a synonym for `|'. */
275 char *special
= "\"!#$&*()\\|[]{}<>?'\"`~^; \t\n";
280 /* We over-compute the size. It shouldn't matter. */
281 for (i
= 0; i
< argc
; ++i
)
282 length
+= 2 * strlen (argv
[i
]) + 1 + 2 * (argv
[i
][0] == '\0');
284 result
= (char *) xmalloc (length
);
287 for (i
= 0; i
< argc
; ++i
)
292 /* Need to handle empty arguments specially. */
293 if (argv
[i
][0] == '\0')
300 for (cp
= argv
[i
]; *cp
; ++cp
)
302 if (strchr (special
, *cp
) != NULL
)
312 /* In this case we can't handle arguments that contain spaces,
313 tabs, or newlines -- see breakup_args(). */
317 for (i
= 0; i
< argc
; ++i
)
319 char *cp
= strchr (argv
[i
], ' ');
321 cp
= strchr (argv
[i
], '\t');
323 cp
= strchr (argv
[i
], '\n');
325 error ("can't handle command-line argument containing whitespace");
326 length
+= strlen (argv
[i
]) + 1;
329 result
= (char *) xmalloc (length
);
331 for (i
= 0; i
< argc
; ++i
)
334 strcat (result
, " ");
335 strcat (result
, argv
[i
]);
343 /* This function detects whether or not a '&' character (indicating
344 background execution) has been added as *the last* of the arguments ARGS
345 of a command. If it has, it removes it and returns 1. Otherwise it
346 does nothing and returns 0. */
348 strip_bg_char (char **args
)
352 p
= strchr (*args
, '&');
356 if (p
== (*args
+ strlen (*args
) - 1))
358 if (strlen (*args
) > 1)
362 while (*p
== ' ' || *p
== '\t');
374 tty_command (char *file
, int from_tty
)
377 error_no_arg ("terminal name for running target process");
379 inferior_io_terminal
= savestring (file
, strlen (file
));
383 run_command (char *args
, int from_tty
)
389 if (! ptid_equal (inferior_ptid
, null_ptid
) && target_has_execution
)
392 && !query ("The program being debugged has been started already.\n\
393 Start it from the beginning? "))
394 error ("Program not restarted.");
396 #if defined(SOLIB_RESTART)
399 init_wait_for_inferior ();
402 clear_breakpoint_hit_counts ();
404 /* Purge old solib objfiles. */
405 objfile_purge_solibs ();
407 do_run_cleanups (NULL
);
409 /* The comment here used to read, "The exec file is re-read every
410 time we do a generic_mourn_inferior, so we just have to worry
411 about the symbol file." The `generic_mourn_inferior' function
412 gets called whenever the program exits. However, suppose the
413 program exits, and *then* the executable file changes? We need
414 to check again here. Since reopen_exec_file doesn't do anything
415 if the timestamp hasn't changed, I don't see the harm. */
419 exec_file
= (char *) get_exec_file (0);
421 /* We keep symbols from add-symbol-file, on the grounds that the
422 user might want to add some symbols before running the program
423 (right?). But sometimes (dynamic loading where the user manually
424 introduces the new symbols with add-symbol-file), the code which
425 the symbols describe does not persist between runs. Currently
426 the user has to manually nuke all symbols between runs if they
427 want them to go away (PR 2207). This is probably reasonable. */
431 if (event_loop_p
&& target_can_async_p ())
432 async_disable_stdin ();
436 int async_exec
= strip_bg_char (&args
);
438 /* If we get a request for running in the bg but the target
439 doesn't support it, error out. */
440 if (event_loop_p
&& async_exec
&& !target_can_async_p ())
441 error ("Asynchronous execution not supported on this target.");
443 /* If we don't get a request of running in the bg, then we need
444 to simulate synchronous (fg) execution. */
445 if (event_loop_p
&& !async_exec
&& target_can_async_p ())
447 /* Simulate synchronous execution */
448 async_disable_stdin ();
451 /* If there were other args, beside '&', process them. */
454 char *old_args
= set_inferior_args (xstrdup (args
));
461 ui_out_field_string (uiout
, NULL
, "Starting program");
462 ui_out_text (uiout
, ": ");
464 ui_out_field_string (uiout
, "execfile", exec_file
);
465 ui_out_spaces (uiout
, 1);
466 /* We call get_inferior_args() because we might need to compute
468 ui_out_field_string (uiout
, "infargs", get_inferior_args ());
469 ui_out_text (uiout
, "\n");
470 ui_out_flush (uiout
);
473 /* We call get_inferior_args() because we might need to compute
475 target_create_inferior (exec_file
, get_inferior_args (),
476 environ_vector (inferior_environ
));
481 run_no_args_command (char *args
, int from_tty
)
483 char *old_args
= set_inferior_args (xstrdup (""));
489 continue_command (char *proc_count_exp
, int from_tty
)
494 /* Find out whether we must run in the background. */
495 if (proc_count_exp
!= NULL
)
496 async_exec
= strip_bg_char (&proc_count_exp
);
498 /* If we must run in the background, but the target can't do it,
500 if (event_loop_p
&& async_exec
&& !target_can_async_p ())
501 error ("Asynchronous execution not supported on this target.");
503 /* If we are not asked to run in the bg, then prepare to run in the
504 foreground, synchronously. */
505 if (event_loop_p
&& !async_exec
&& target_can_async_p ())
507 /* Simulate synchronous execution */
508 async_disable_stdin ();
511 /* If have argument (besides '&'), set proceed count of breakpoint
513 if (proc_count_exp
!= NULL
)
515 bpstat bs
= stop_bpstat
;
516 int num
= bpstat_num (&bs
);
517 if (num
== 0 && from_tty
)
520 ("Not stopped at any breakpoint; argument ignored.\n");
524 set_ignore_count (num
,
525 parse_and_eval_long (proc_count_exp
) - 1,
527 /* set_ignore_count prints a message ending with a period.
528 So print two spaces before "Continuing.". */
530 printf_filtered (" ");
531 num
= bpstat_num (&bs
);
536 printf_filtered ("Continuing.\n");
538 clear_proceed_status ();
540 proceed ((CORE_ADDR
) -1, TARGET_SIGNAL_DEFAULT
, 0);
543 /* Step until outside of current statement. */
546 step_command (char *count_string
, int from_tty
)
548 step_1 (0, 0, count_string
);
551 /* Likewise, but skip over subroutine calls as if single instructions. */
554 next_command (char *count_string
, int from_tty
)
556 step_1 (1, 0, count_string
);
559 /* Likewise, but step only one instruction. */
562 stepi_command (char *count_string
, int from_tty
)
564 step_1 (0, 1, count_string
);
568 nexti_command (char *count_string
, int from_tty
)
570 step_1 (1, 1, count_string
);
574 disable_longjmp_breakpoint_cleanup (void *ignore
)
576 disable_longjmp_breakpoint ();
580 step_1 (int skip_subroutines
, int single_inst
, char *count_string
)
583 struct frame_info
*frame
;
584 struct cleanup
*cleanups
= 0;
590 async_exec
= strip_bg_char (&count_string
);
592 /* If we get a request for running in the bg but the target
593 doesn't support it, error out. */
594 if (event_loop_p
&& async_exec
&& !target_can_async_p ())
595 error ("Asynchronous execution not supported on this target.");
597 /* If we don't get a request of running in the bg, then we need
598 to simulate synchronous (fg) execution. */
599 if (event_loop_p
&& !async_exec
&& target_can_async_p ())
601 /* Simulate synchronous execution */
602 async_disable_stdin ();
605 count
= count_string
? parse_and_eval_long (count_string
) : 1;
607 if (!single_inst
|| skip_subroutines
) /* leave si command alone */
609 enable_longjmp_breakpoint ();
610 if (!event_loop_p
|| !target_can_async_p ())
611 cleanups
= make_cleanup (disable_longjmp_breakpoint_cleanup
, 0 /*ignore*/);
613 make_exec_cleanup (disable_longjmp_breakpoint_cleanup
, 0 /*ignore*/);
616 /* In synchronous case, all is well, just use the regular for loop. */
617 if (!event_loop_p
|| !target_can_async_p ())
619 for (; count
> 0; count
--)
621 clear_proceed_status ();
623 frame
= get_current_frame ();
624 if (!frame
) /* Avoid coredump here. Why tho? */
625 error ("No current frame");
626 step_frame_id
= get_frame_id (frame
);
627 step_sp
= read_sp ();
631 find_pc_line_pc_range (stop_pc
, &step_range_start
, &step_range_end
);
632 if (step_range_end
== 0)
635 if (find_pc_partial_function (stop_pc
, &name
, &step_range_start
,
636 &step_range_end
) == 0)
637 error ("Cannot find bounds of current function");
639 target_terminal_ours ();
641 Single stepping until exit from function %s, \n\
642 which has no line number information.\n", name
);
647 /* Say we are stepping, but stop after one insn whatever it does. */
648 step_range_start
= step_range_end
= 1;
649 if (!skip_subroutines
)
651 Don't step over function calls, not even to functions lacking
653 step_over_calls
= STEP_OVER_NONE
;
656 if (skip_subroutines
)
657 step_over_calls
= STEP_OVER_ALL
;
659 step_multi
= (count
> 1);
660 proceed ((CORE_ADDR
) -1, TARGET_SIGNAL_DEFAULT
, 1);
666 if (!single_inst
|| skip_subroutines
)
667 do_cleanups (cleanups
);
670 /* In case of asynchronous target things get complicated, do only
671 one step for now, before returning control to the event loop. Let
672 the continuation figure out how many other steps we need to do,
673 and handle them one at the time, through step_once(). */
676 if (event_loop_p
&& target_can_async_p ())
677 step_once (skip_subroutines
, single_inst
, count
);
681 /* Called after we are done with one step operation, to check whether
682 we need to step again, before we print the prompt and return control
683 to the user. If count is > 1, we will need to do one more call to
684 proceed(), via step_once(). Basically it is like step_once and
685 step_1_continuation are co-recursive. */
687 step_1_continuation (struct continuation_arg
*arg
)
690 int skip_subroutines
;
693 skip_subroutines
= arg
->data
.integer
;
694 single_inst
= arg
->next
->data
.integer
;
695 count
= arg
->next
->next
->data
.integer
;
698 step_once (skip_subroutines
, single_inst
, count
- 1);
700 if (!single_inst
|| skip_subroutines
)
701 do_exec_cleanups (ALL_CLEANUPS
);
704 /* Do just one step operation. If count >1 we will have to set up a
705 continuation to be done after the target stops (after this one
706 step). This is useful to implement the 'step n' kind of commands, in
707 case of asynchronous targets. We had to split step_1 into two parts,
708 one to be done before proceed() and one afterwards. This function is
709 called in case of step n with n>1, after the first step operation has
712 step_once (int skip_subroutines
, int single_inst
, int count
)
714 struct continuation_arg
*arg1
;
715 struct continuation_arg
*arg2
;
716 struct continuation_arg
*arg3
;
717 struct frame_info
*frame
;
721 clear_proceed_status ();
723 frame
= get_current_frame ();
724 if (!frame
) /* Avoid coredump here. Why tho? */
725 error ("No current frame");
726 step_frame_id
= get_frame_id (frame
);
727 step_sp
= read_sp ();
731 find_pc_line_pc_range (stop_pc
, &step_range_start
, &step_range_end
);
733 /* If we have no line info, switch to stepi mode. */
734 if (step_range_end
== 0 && step_stop_if_no_debug
)
736 step_range_start
= step_range_end
= 1;
738 else if (step_range_end
== 0)
741 if (find_pc_partial_function (stop_pc
, &name
, &step_range_start
,
742 &step_range_end
) == 0)
743 error ("Cannot find bounds of current function");
745 target_terminal_ours ();
747 Single stepping until exit from function %s, \n\
748 which has no line number information.\n", name
);
753 /* Say we are stepping, but stop after one insn whatever it does. */
754 step_range_start
= step_range_end
= 1;
755 if (!skip_subroutines
)
757 Don't step over function calls, not even to functions lacking
759 step_over_calls
= STEP_OVER_NONE
;
762 if (skip_subroutines
)
763 step_over_calls
= STEP_OVER_ALL
;
765 step_multi
= (count
> 1);
767 (struct continuation_arg
*) xmalloc (sizeof (struct continuation_arg
));
769 (struct continuation_arg
*) xmalloc (sizeof (struct continuation_arg
));
771 (struct continuation_arg
*) xmalloc (sizeof (struct continuation_arg
));
773 arg1
->data
.integer
= skip_subroutines
;
775 arg2
->data
.integer
= single_inst
;
777 arg3
->data
.integer
= count
;
778 add_intermediate_continuation (step_1_continuation
, arg1
);
779 proceed ((CORE_ADDR
) -1, TARGET_SIGNAL_DEFAULT
, 1);
784 /* Continue program at specified address. */
787 jump_command (char *arg
, int from_tty
)
790 struct symtabs_and_lines sals
;
791 struct symtab_and_line sal
;
798 /* Find out whether we must run in the background. */
800 async_exec
= strip_bg_char (&arg
);
802 /* If we must run in the background, but the target can't do it,
804 if (event_loop_p
&& async_exec
&& !target_can_async_p ())
805 error ("Asynchronous execution not supported on this target.");
807 /* If we are not asked to run in the bg, then prepare to run in the
808 foreground, synchronously. */
809 if (event_loop_p
&& !async_exec
&& target_can_async_p ())
811 /* Simulate synchronous execution */
812 async_disable_stdin ();
816 error_no_arg ("starting address");
818 sals
= decode_line_spec_1 (arg
, 1);
821 error ("Unreasonable jump request");
827 if (sal
.symtab
== 0 && sal
.pc
== 0)
828 error ("No source file has been specified.");
830 resolve_sal_pc (&sal
); /* May error out */
832 /* See if we are trying to jump to another function. */
833 fn
= get_frame_function (get_current_frame ());
834 sfn
= find_pc_function (sal
.pc
);
835 if (fn
!= NULL
&& sfn
!= fn
)
837 if (!query ("Line %d is not in `%s'. Jump anyway? ", sal
.line
,
838 SYMBOL_PRINT_NAME (fn
)))
840 error ("Not confirmed.");
847 fixup_symbol_section (sfn
, 0);
848 if (section_is_overlay (SYMBOL_BFD_SECTION (sfn
)) &&
849 !section_is_mapped (SYMBOL_BFD_SECTION (sfn
)))
851 if (!query ("WARNING!!! Destination is in unmapped overlay! Jump anyway? "))
853 error ("Not confirmed.");
863 printf_filtered ("Continuing at ");
864 print_address_numeric (addr
, 1, gdb_stdout
);
865 printf_filtered (".\n");
868 clear_proceed_status ();
869 proceed (addr
, TARGET_SIGNAL_0
, 0);
873 /* Go to line or address in current procedure */
875 go_command (char *line_no
, int from_tty
)
877 if (line_no
== (char *) NULL
|| !*line_no
)
878 printf_filtered (GO_USAGE
);
881 tbreak_command (line_no
, from_tty
);
882 jump_command (line_no
, from_tty
);
887 /* Continue program giving it specified signal. */
890 signal_command (char *signum_exp
, int from_tty
)
892 enum target_signal oursig
;
894 dont_repeat (); /* Too dangerous. */
898 error_no_arg ("signal number");
900 /* It would be even slicker to make signal names be valid expressions,
901 (the type could be "enum $signal" or some such), then the user could
902 assign them to convenience variables. */
903 oursig
= target_signal_from_name (signum_exp
);
905 if (oursig
== TARGET_SIGNAL_UNKNOWN
)
907 /* No, try numeric. */
908 int num
= parse_and_eval_long (signum_exp
);
911 oursig
= TARGET_SIGNAL_0
;
913 oursig
= target_signal_from_command (num
);
918 if (oursig
== TARGET_SIGNAL_0
)
919 printf_filtered ("Continuing with no signal.\n");
921 printf_filtered ("Continuing with signal %s.\n",
922 target_signal_to_name (oursig
));
925 clear_proceed_status ();
926 /* "signal 0" should not get stuck if we are stopped at a breakpoint.
927 FIXME: Neither should "signal foo" but when I tried passing
928 (CORE_ADDR)-1 unconditionally I got a testsuite failure which I haven't
929 tried to track down yet. */
930 proceed (oursig
== TARGET_SIGNAL_0
? (CORE_ADDR
) -1 : stop_pc
, oursig
, 0);
933 /* Proceed until we reach a different source line with pc greater than
934 our current one or exit the function. We skip calls in both cases.
936 Note that eventually this command should probably be changed so
937 that only source lines are printed out when we hit the breakpoint
938 we set. This may involve changes to wait_for_inferior and the
939 proceed status code. */
942 until_next_command (int from_tty
)
944 struct frame_info
*frame
;
947 struct symtab_and_line sal
;
949 clear_proceed_status ();
951 frame
= get_current_frame ();
953 /* Step until either exited from this function or greater
954 than the current line (if in symbolic section) or pc (if
958 func
= find_pc_function (pc
);
962 struct minimal_symbol
*msymbol
= lookup_minimal_symbol_by_pc (pc
);
965 error ("Execution is not within a known function.");
967 step_range_start
= SYMBOL_VALUE_ADDRESS (msymbol
);
972 sal
= find_pc_line (pc
, 0);
974 step_range_start
= BLOCK_START (SYMBOL_BLOCK_VALUE (func
));
975 step_range_end
= sal
.end
;
978 step_over_calls
= STEP_OVER_ALL
;
979 step_frame_id
= get_frame_id (frame
);
980 step_sp
= read_sp ();
982 step_multi
= 0; /* Only one call to proceed */
984 proceed ((CORE_ADDR
) -1, TARGET_SIGNAL_DEFAULT
, 1);
988 until_command (char *arg
, int from_tty
)
992 if (!target_has_execution
)
993 error ("The program is not running.");
995 /* Find out whether we must run in the background. */
997 async_exec
= strip_bg_char (&arg
);
999 /* If we must run in the background, but the target can't do it,
1001 if (event_loop_p
&& async_exec
&& !target_can_async_p ())
1002 error ("Asynchronous execution not supported on this target.");
1004 /* If we are not asked to run in the bg, then prepare to run in the
1005 foreground, synchronously. */
1006 if (event_loop_p
&& !async_exec
&& target_can_async_p ())
1008 /* Simulate synchronous execution */
1009 async_disable_stdin ();
1013 until_break_command (arg
, from_tty
, 0);
1015 until_next_command (from_tty
);
1019 advance_command (char *arg
, int from_tty
)
1023 if (!target_has_execution
)
1024 error ("The program is not running.");
1027 error_no_arg ("a location");
1029 /* Find out whether we must run in the background. */
1031 async_exec
= strip_bg_char (&arg
);
1033 /* If we must run in the background, but the target can't do it,
1035 if (event_loop_p
&& async_exec
&& !target_can_async_p ())
1036 error ("Asynchronous execution not supported on this target.");
1038 /* If we are not asked to run in the bg, then prepare to run in the
1039 foreground, synchronously. */
1040 if (event_loop_p
&& !async_exec
&& target_can_async_p ())
1042 /* Simulate synchronous execution. */
1043 async_disable_stdin ();
1046 until_break_command (arg
, from_tty
, 1);
1050 static struct value
*
1051 legacy_return_value (int struct_return
, struct type
*value_type
)
1053 struct value
*value
;
1057 /* The return value can be found in the inferior's registers. */
1058 return register_value_being_returned (value_type
, stop_registers
);
1061 if (DEPRECATED_EXTRACT_STRUCT_VALUE_ADDRESS_P ())
1065 addr
= DEPRECATED_EXTRACT_STRUCT_VALUE_ADDRESS (stop_registers
);
1067 error ("Function return value unknown.");
1068 return value_at (value_type
, addr
, NULL
);
1071 /* It is "struct return" yet the value is being extracted,
1072 presumably from registers, using EXTRACT_RETURN_VALUE. This
1073 doesn't make sense. Unfortunately, the legacy interfaces allowed
1074 this behavior. Sigh! */
1075 value
= allocate_value (value_type
);
1076 CHECK_TYPEDEF (value_type
);
1077 /* If the function returns void, don't bother fetching the return
1079 EXTRACT_RETURN_VALUE (value_type
, stop_registers
,
1080 VALUE_CONTENTS_RAW (value
));
1084 /* Print the result of a function at the end of a 'finish' command. */
1087 print_return_value (int struct_return
, struct type
*value_type
)
1089 struct gdbarch
*gdbarch
= current_gdbarch
;
1090 struct cleanup
*old_chain
;
1091 struct ui_stream
*stb
;
1092 struct value
*value
= NULL
;
1094 /* FIXME: 2003-09-27: When returning from a nested inferior function
1095 call, it's possible (with no help from the architecture vector)
1096 to locate and return/print a "struct return" value. This is just
1097 a more complicated case of what is already being done in in the
1098 inferior function call code. In fact, when inferior function
1099 calls are made async, this will likely be made the norm. */
1101 if (gdbarch_return_value_p (gdbarch
))
1103 switch (gdbarch_return_value (gdbarch
, value_type
, NULL
, NULL
, NULL
))
1105 case RETURN_VALUE_REGISTER_CONVENTION
:
1106 case RETURN_VALUE_ABI_RETURNS_ADDRESS
:
1107 value
= allocate_value (value_type
);
1108 CHECK_TYPEDEF (value_type
);
1109 gdbarch_return_value (current_gdbarch
, value_type
, stop_registers
,
1110 VALUE_CONTENTS_RAW (value
), NULL
);
1113 case RETURN_VALUE_STRUCT_CONVENTION
:
1118 value
= legacy_return_value (struct_return
, value_type
);
1123 stb
= ui_out_stream_new (uiout
);
1124 old_chain
= make_cleanup_ui_out_stream_delete (stb
);
1125 ui_out_text (uiout
, "Value returned is ");
1126 ui_out_field_fmt (uiout
, "gdb-result-var", "$%d",
1127 record_latest_value (value
));
1128 ui_out_text (uiout
, " = ");
1129 value_print (value
, stb
->stream
, 0, Val_no_prettyprint
);
1130 ui_out_field_stream (uiout
, "return-value", stb
);
1131 ui_out_text (uiout
, "\n");
1132 do_cleanups (old_chain
);
1136 ui_out_text (uiout
, "Value returned has type: ");
1137 ui_out_field_string (uiout
, "return-type", TYPE_NAME (value_type
));
1138 ui_out_text (uiout
, ".");
1139 ui_out_text (uiout
, " Cannot determine contents\n");
1143 /* Stuff that needs to be done by the finish command after the target
1144 has stopped. In asynchronous mode, we wait for the target to stop
1145 in the call to poll or select in the event loop, so it is
1146 impossible to do all the stuff as part of the finish_command
1147 function itself. The only chance we have to complete this command
1148 is in fetch_inferior_event, which is called by the event loop as
1149 soon as it detects that the target has stopped. This function is
1150 called via the cmd_continuation pointer. */
1153 finish_command_continuation (struct continuation_arg
*arg
)
1155 struct symbol
*function
;
1156 struct breakpoint
*breakpoint
;
1157 struct cleanup
*cleanups
;
1159 breakpoint
= (struct breakpoint
*) arg
->data
.pointer
;
1160 function
= (struct symbol
*) arg
->next
->data
.pointer
;
1161 cleanups
= (struct cleanup
*) arg
->next
->next
->data
.pointer
;
1163 if (bpstat_find_breakpoint (stop_bpstat
, breakpoint
) != NULL
1164 && function
!= NULL
)
1166 struct type
*value_type
;
1170 value_type
= TYPE_TARGET_TYPE (SYMBOL_TYPE (function
));
1172 internal_error (__FILE__
, __LINE__
,
1173 "finish_command: function has no target type");
1175 if (TYPE_CODE (value_type
) == TYPE_CODE_VOID
)
1177 do_exec_cleanups (cleanups
);
1181 CHECK_TYPEDEF (value_type
);
1182 gcc_compiled
= BLOCK_GCC_COMPILED (SYMBOL_BLOCK_VALUE (function
));
1183 struct_return
= using_struct_return (value_type
, gcc_compiled
);
1185 print_return_value (struct_return
, value_type
);
1188 do_exec_cleanups (cleanups
);
1191 /* "finish": Set a temporary breakpoint at the place the selected
1192 frame will return to, then continue. */
1195 finish_command (char *arg
, int from_tty
)
1197 struct symtab_and_line sal
;
1198 struct frame_info
*frame
;
1199 struct symbol
*function
;
1200 struct breakpoint
*breakpoint
;
1201 struct cleanup
*old_chain
;
1202 struct continuation_arg
*arg1
, *arg2
, *arg3
;
1206 /* Find out whether we must run in the background. */
1208 async_exec
= strip_bg_char (&arg
);
1210 /* If we must run in the background, but the target can't do it,
1212 if (event_loop_p
&& async_exec
&& !target_can_async_p ())
1213 error ("Asynchronous execution not supported on this target.");
1215 /* If we are not asked to run in the bg, then prepare to run in the
1216 foreground, synchronously. */
1217 if (event_loop_p
&& !async_exec
&& target_can_async_p ())
1219 /* Simulate synchronous execution. */
1220 async_disable_stdin ();
1224 error ("The \"finish\" command does not take any arguments.");
1225 if (!target_has_execution
)
1226 error ("The program is not running.");
1227 if (deprecated_selected_frame
== NULL
)
1228 error ("No selected frame.");
1230 frame
= get_prev_frame (deprecated_selected_frame
);
1232 error ("\"finish\" not meaningful in the outermost frame.");
1234 clear_proceed_status ();
1236 sal
= find_pc_line (get_frame_pc (frame
), 0);
1237 sal
.pc
= get_frame_pc (frame
);
1239 breakpoint
= set_momentary_breakpoint (sal
, get_frame_id (frame
), bp_finish
);
1241 if (!event_loop_p
|| !target_can_async_p ())
1242 old_chain
= make_cleanup_delete_breakpoint (breakpoint
);
1244 old_chain
= make_exec_cleanup_delete_breakpoint (breakpoint
);
1246 /* Find the function we will return from. */
1248 function
= find_pc_function (get_frame_pc (deprecated_selected_frame
));
1250 /* Print info on the selected frame, including level number but not
1254 printf_filtered ("Run till exit from ");
1255 print_stack_frame (get_selected_frame (), 1, LOCATION
);
1258 /* If running asynchronously and the target support asynchronous
1259 execution, set things up for the rest of the finish command to be
1260 completed later on, when gdb has detected that the target has
1261 stopped, in fetch_inferior_event. */
1262 if (event_loop_p
&& target_can_async_p ())
1265 (struct continuation_arg
*) xmalloc (sizeof (struct continuation_arg
));
1267 (struct continuation_arg
*) xmalloc (sizeof (struct continuation_arg
));
1269 (struct continuation_arg
*) xmalloc (sizeof (struct continuation_arg
));
1273 arg1
->data
.pointer
= breakpoint
;
1274 arg2
->data
.pointer
= function
;
1275 arg3
->data
.pointer
= old_chain
;
1276 add_continuation (finish_command_continuation
, arg1
);
1279 proceed_to_finish
= 1; /* We want stop_registers, please... */
1280 proceed ((CORE_ADDR
) -1, TARGET_SIGNAL_DEFAULT
, 0);
1282 /* Do this only if not running asynchronously or if the target
1283 cannot do async execution. Otherwise, complete this command when
1284 the target actually stops, in fetch_inferior_event. */
1285 if (!event_loop_p
|| !target_can_async_p ())
1287 /* Did we stop at our breakpoint? */
1288 if (bpstat_find_breakpoint (stop_bpstat
, breakpoint
) != NULL
1289 && function
!= NULL
)
1291 struct type
*value_type
;
1295 value_type
= TYPE_TARGET_TYPE (SYMBOL_TYPE (function
));
1297 internal_error (__FILE__
, __LINE__
,
1298 "finish_command: function has no target type");
1300 /* FIXME: Shouldn't we do the cleanups before returning? */
1301 if (TYPE_CODE (value_type
) == TYPE_CODE_VOID
)
1304 CHECK_TYPEDEF (value_type
);
1305 gcc_compiled
= BLOCK_GCC_COMPILED (SYMBOL_BLOCK_VALUE (function
));
1306 struct_return
= using_struct_return (value_type
, gcc_compiled
);
1308 print_return_value (struct_return
, value_type
);
1311 do_cleanups (old_chain
);
1317 program_info (char *args
, int from_tty
)
1319 bpstat bs
= stop_bpstat
;
1320 int num
= bpstat_num (&bs
);
1322 if (!target_has_execution
)
1324 printf_filtered ("The program being debugged is not being run.\n");
1328 target_files_info ();
1329 printf_filtered ("Program stopped at %s.\n",
1330 local_hex_string ((unsigned long) stop_pc
));
1332 printf_filtered ("It stopped after being stepped.\n");
1335 /* There may be several breakpoints in the same place, so this
1336 isn't as strange as it seems. */
1341 printf_filtered ("It stopped at a breakpoint that has ");
1342 printf_filtered ("since been deleted.\n");
1345 printf_filtered ("It stopped at breakpoint %d.\n", num
);
1346 num
= bpstat_num (&bs
);
1349 else if (stop_signal
!= TARGET_SIGNAL_0
)
1351 printf_filtered ("It stopped with signal %s, %s.\n",
1352 target_signal_to_name (stop_signal
),
1353 target_signal_to_string (stop_signal
));
1358 printf_filtered ("Type \"info stack\" or \"info registers\" ");
1359 printf_filtered ("for more information.\n");
1364 environment_info (char *var
, int from_tty
)
1368 char *val
= get_in_environ (inferior_environ
, var
);
1371 puts_filtered (var
);
1372 puts_filtered (" = ");
1373 puts_filtered (val
);
1374 puts_filtered ("\n");
1378 puts_filtered ("Environment variable \"");
1379 puts_filtered (var
);
1380 puts_filtered ("\" not defined.\n");
1385 char **vector
= environ_vector (inferior_environ
);
1388 puts_filtered (*vector
++);
1389 puts_filtered ("\n");
1395 set_environment_command (char *arg
, int from_tty
)
1397 char *p
, *val
, *var
;
1401 error_no_arg ("environment variable and value");
1403 /* Find seperation between variable name and value */
1404 p
= (char *) strchr (arg
, '=');
1405 val
= (char *) strchr (arg
, ' ');
1407 if (p
!= 0 && val
!= 0)
1409 /* We have both a space and an equals. If the space is before the
1410 equals, walk forward over the spaces til we see a nonspace
1411 (possibly the equals). */
1416 /* Now if the = is after the char following the spaces,
1417 take the char following the spaces. */
1421 else if (val
!= 0 && p
== 0)
1425 error_no_arg ("environment variable to set");
1427 if (p
== 0 || p
[1] == 0)
1431 p
= arg
+ strlen (arg
); /* So that savestring below will work */
1435 /* Not setting variable value to null */
1437 while (*val
== ' ' || *val
== '\t')
1441 while (p
!= arg
&& (p
[-1] == ' ' || p
[-1] == '\t'))
1444 var
= savestring (arg
, p
- arg
);
1447 printf_filtered ("Setting environment variable ");
1448 printf_filtered ("\"%s\" to null value.\n", var
);
1449 set_in_environ (inferior_environ
, var
, "");
1452 set_in_environ (inferior_environ
, var
, val
);
1457 unset_environment_command (char *var
, int from_tty
)
1461 /* If there is no argument, delete all environment variables.
1462 Ask for confirmation if reading from the terminal. */
1463 if (!from_tty
|| query ("Delete all environment variables? "))
1465 free_environ (inferior_environ
);
1466 inferior_environ
= make_environ ();
1470 unset_in_environ (inferior_environ
, var
);
1473 /* Handle the execution path (PATH variable) */
1475 static const char path_var_name
[] = "PATH";
1478 path_info (char *args
, int from_tty
)
1480 puts_filtered ("Executable and object file path: ");
1481 puts_filtered (get_in_environ (inferior_environ
, path_var_name
));
1482 puts_filtered ("\n");
1485 /* Add zero or more directories to the front of the execution path. */
1488 path_command (char *dirname
, int from_tty
)
1493 env
= get_in_environ (inferior_environ
, path_var_name
);
1494 /* Can be null if path is not set */
1497 exec_path
= xstrdup (env
);
1498 mod_path (dirname
, &exec_path
);
1499 set_in_environ (inferior_environ
, path_var_name
, exec_path
);
1502 path_info ((char *) NULL
, from_tty
);
1506 /* Print out the machine register regnum. If regnum is -1, print all
1507 registers (print_all == 1) or all non-float and non-vector
1508 registers (print_all == 0).
1510 For most machines, having all_registers_info() print the
1511 register(s) one per line is good enough. If a different format is
1512 required, (eg, for MIPS or Pyramid 90x, which both have lots of
1513 regs), or there is an existing convention for showing all the
1514 registers, define the architecture method PRINT_REGISTERS_INFO to
1515 provide that format. */
1518 default_print_registers_info (struct gdbarch
*gdbarch
,
1519 struct ui_file
*file
,
1520 struct frame_info
*frame
,
1521 int regnum
, int print_all
)
1524 const int numregs
= NUM_REGS
+ NUM_PSEUDO_REGS
;
1525 char raw_buffer
[MAX_REGISTER_SIZE
];
1526 char virtual_buffer
[MAX_REGISTER_SIZE
];
1528 if (DEPRECATED_DO_REGISTERS_INFO_P ())
1530 DEPRECATED_DO_REGISTERS_INFO (regnum
, print_all
);
1534 for (i
= 0; i
< numregs
; i
++)
1536 /* Decide between printing all regs, non-float / vector regs, or
1542 if (!gdbarch_register_reggroup_p (gdbarch
, i
, all_reggroup
))
1547 if (!gdbarch_register_reggroup_p (gdbarch
, i
, general_reggroup
))
1557 /* If the register name is empty, it is undefined for this
1558 processor, so don't display anything. */
1559 if (REGISTER_NAME (i
) == NULL
|| *(REGISTER_NAME (i
)) == '\0')
1562 fputs_filtered (REGISTER_NAME (i
), file
);
1563 print_spaces_filtered (15 - strlen (REGISTER_NAME (i
)), file
);
1565 /* Get the data in raw format. */
1566 if (! frame_register_read (frame
, i
, raw_buffer
))
1568 fprintf_filtered (file
, "*value not available*\n");
1572 /* FIXME: cagney/2002-08-03: This code shouldn't be necessary.
1573 The function frame_register_read() should have returned the
1574 pre-cooked register so no conversion is necessary. */
1575 /* Convert raw data to virtual format if necessary. */
1576 if (DEPRECATED_REGISTER_CONVERTIBLE_P ()
1577 && DEPRECATED_REGISTER_CONVERTIBLE (i
))
1579 DEPRECATED_REGISTER_CONVERT_TO_VIRTUAL (i
, register_type (current_gdbarch
, i
),
1580 raw_buffer
, virtual_buffer
);
1584 memcpy (virtual_buffer
, raw_buffer
,
1585 DEPRECATED_REGISTER_VIRTUAL_SIZE (i
));
1588 /* If virtual format is floating, print it that way, and in raw
1590 if (TYPE_CODE (register_type (current_gdbarch
, i
)) == TYPE_CODE_FLT
)
1594 val_print (register_type (current_gdbarch
, i
), virtual_buffer
, 0, 0,
1595 file
, 0, 1, 0, Val_pretty_default
);
1597 fprintf_filtered (file
, "\t(raw 0x");
1598 for (j
= 0; j
< DEPRECATED_REGISTER_RAW_SIZE (i
); j
++)
1601 if (TARGET_BYTE_ORDER
== BFD_ENDIAN_BIG
)
1604 idx
= DEPRECATED_REGISTER_RAW_SIZE (i
) - 1 - j
;
1605 fprintf_filtered (file
, "%02x", (unsigned char) raw_buffer
[idx
]);
1607 fprintf_filtered (file
, ")");
1611 /* Print the register in hex. */
1612 val_print (register_type (current_gdbarch
, i
), virtual_buffer
, 0, 0,
1613 file
, 'x', 1, 0, Val_pretty_default
);
1614 /* If not a vector register, print it also according to its
1616 if (TYPE_VECTOR (register_type (current_gdbarch
, i
)) == 0)
1618 fprintf_filtered (file
, "\t");
1619 val_print (register_type (current_gdbarch
, i
), virtual_buffer
, 0, 0,
1620 file
, 0, 1, 0, Val_pretty_default
);
1624 fprintf_filtered (file
, "\n");
1629 registers_info (char *addr_exp
, int fpregs
)
1631 int regnum
, numregs
;
1634 if (!target_has_registers
)
1635 error ("The program has no registers now.");
1636 if (deprecated_selected_frame
== NULL
)
1637 error ("No selected frame.");
1641 gdbarch_print_registers_info (current_gdbarch
, gdb_stdout
,
1642 deprecated_selected_frame
, -1, fpregs
);
1646 while (*addr_exp
!= '\0')
1651 /* Keep skipping leading white space. */
1652 if (isspace ((*addr_exp
)))
1658 /* Discard any leading ``$''. Check that there is something
1659 resembling a register following it. */
1660 if (addr_exp
[0] == '$')
1662 if (isspace ((*addr_exp
)) || (*addr_exp
) == '\0')
1663 error ("Missing register name");
1665 /* Find the start/end of this register name/num/group. */
1667 while ((*addr_exp
) != '\0' && !isspace ((*addr_exp
)))
1671 /* Figure out what we've found and display it. */
1673 /* A register name? */
1675 int regnum
= frame_map_name_to_regnum (deprecated_selected_frame
,
1676 start
, end
- start
);
1679 gdbarch_print_registers_info (current_gdbarch
, gdb_stdout
,
1680 deprecated_selected_frame
, regnum
, fpregs
);
1685 /* A register number? (how portable is this one?). */
1688 int regnum
= strtol (start
, &endptr
, 0);
1691 && regnum
< NUM_REGS
+ NUM_PSEUDO_REGS
)
1693 gdbarch_print_registers_info (current_gdbarch
, gdb_stdout
,
1694 deprecated_selected_frame
, regnum
, fpregs
);
1699 /* A register group? */
1701 struct reggroup
*group
;
1702 for (group
= reggroup_next (current_gdbarch
, NULL
);
1704 group
= reggroup_next (current_gdbarch
, group
))
1706 /* Don't bother with a length check. Should the user
1707 enter a short register group name, go with the first
1708 group that matches. */
1709 if (strncmp (start
, reggroup_name (group
), end
- start
) == 0)
1715 for (regnum
= 0; regnum
< NUM_REGS
+ NUM_PSEUDO_REGS
; regnum
++)
1717 if (gdbarch_register_reggroup_p (current_gdbarch
, regnum
,
1719 gdbarch_print_registers_info (current_gdbarch
,
1720 gdb_stdout
, deprecated_selected_frame
,
1727 /* Nothing matched. */
1728 error ("Invalid register `%.*s'", (int) (end
- start
), start
);
1733 all_registers_info (char *addr_exp
, int from_tty
)
1735 registers_info (addr_exp
, 1);
1739 nofp_registers_info (char *addr_exp
, int from_tty
)
1741 registers_info (addr_exp
, 0);
1745 print_vector_info (struct gdbarch
*gdbarch
, struct ui_file
*file
,
1746 struct frame_info
*frame
, const char *args
)
1748 if (!target_has_registers
)
1749 error ("The program has no registers now.");
1750 if (deprecated_selected_frame
== NULL
)
1751 error ("No selected frame.");
1753 if (gdbarch_print_vector_info_p (gdbarch
))
1754 gdbarch_print_vector_info (gdbarch
, file
, frame
, args
);
1758 int printed_something
= 0;
1760 for (regnum
= 0; regnum
< NUM_REGS
+ NUM_PSEUDO_REGS
; regnum
++)
1762 if (gdbarch_register_reggroup_p (gdbarch
, regnum
, vector_reggroup
))
1764 printed_something
= 1;
1765 gdbarch_print_registers_info (gdbarch
, file
, frame
, regnum
, 1);
1768 if (!printed_something
)
1769 fprintf_filtered (file
, "No vector information\n");
1774 vector_info (char *args
, int from_tty
)
1776 print_vector_info (current_gdbarch
, gdb_stdout
, deprecated_selected_frame
, args
);
1782 * Should save/restore the tty state since it might be that the
1783 * program to be debugged was started on this tty and it wants
1784 * the tty in some state other than what we want. If it's running
1785 * on another terminal or without a terminal, then saving and
1786 * restoring the tty state is a harmless no-op.
1787 * This only needs to be done if we are attaching to a process.
1792 takes a program started up outside of gdb and ``attaches'' to it.
1793 This stops it cold in its tracks and allows us to start debugging it.
1794 and wait for the trace-trap that results from attaching. */
1797 attach_command (char *args
, int from_tty
)
1800 char *full_exec_path
= NULL
;
1802 dont_repeat (); /* Not for the faint of heart */
1804 if (target_has_execution
)
1806 if (query ("A program is being debugged already. Kill it? "))
1809 error ("Not killed.");
1812 target_attach (args
, from_tty
);
1814 /* Set up the "saved terminal modes" of the inferior
1815 based on what modes we are starting it with. */
1816 target_terminal_init ();
1818 /* Install inferior's terminal modes. */
1819 target_terminal_inferior ();
1821 /* Set up execution context to know that we should return from
1822 wait_for_inferior as soon as the target reports a stop. */
1823 init_wait_for_inferior ();
1824 clear_proceed_status ();
1826 /* No traps are generated when attaching to inferior under Mach 3
1828 #ifndef ATTACH_NO_WAIT
1829 /* Careful here. See comments in inferior.h. Basically some OSes
1830 don't ignore SIGSTOPs on continue requests anymore. We need a
1831 way for handle_inferior_event to reset the stop_signal variable
1832 after an attach, and this is what STOP_QUIETLY_NO_SIGSTOP is for. */
1833 stop_soon
= STOP_QUIETLY_NO_SIGSTOP
;
1834 wait_for_inferior ();
1835 stop_soon
= NO_STOP_QUIETLY
;
1839 * If no exec file is yet known, try to determine it from the
1842 exec_file
= (char *) get_exec_file (0);
1845 exec_file
= target_pid_to_exec_file (PIDGET (inferior_ptid
));
1848 /* It's possible we don't have a full path, but rather just a
1849 filename. Some targets, such as HP-UX, don't provide the
1852 Attempt to qualify the filename against the source path.
1853 (If that fails, we'll just fall back on the original
1854 filename. Not much more we can do...)
1856 if (!source_full_path_of (exec_file
, &full_exec_path
))
1857 full_exec_path
= savestring (exec_file
, strlen (exec_file
));
1859 exec_file_attach (full_exec_path
, from_tty
);
1860 symbol_file_add_main (full_exec_path
, from_tty
);
1865 reopen_exec_file ();
1870 /* Add shared library symbols from the newly attached process, if any. */
1871 SOLIB_ADD ((char *) 0, from_tty
, ¤t_target
, auto_solib_add
);
1872 re_enable_breakpoints_in_shlibs ();
1875 /* Take any necessary post-attaching actions for this platform.
1877 target_post_attach (PIDGET (inferior_ptid
));
1881 if (deprecated_attach_hook
)
1882 deprecated_attach_hook ();
1887 * takes a program previously attached to and detaches it.
1888 * The program resumes execution and will no longer stop
1889 * on signals, etc. We better not have left any breakpoints
1890 * in the program or it'll die when it hits one. For this
1891 * to work, it may be necessary for the process to have been
1892 * previously attached. It *might* work if the program was
1893 * started via the normal ptrace (PTRACE_TRACEME).
1897 detach_command (char *args
, int from_tty
)
1899 dont_repeat (); /* Not for the faint of heart */
1900 target_detach (args
, from_tty
);
1901 #if defined(SOLIB_RESTART)
1904 if (deprecated_detach_hook
)
1905 deprecated_detach_hook ();
1908 /* Disconnect from the current target without resuming it (leaving it
1909 waiting for a debugger).
1911 We'd better not have left any breakpoints in the program or the
1912 next debugger will get confused. Currently only supported for some
1913 remote targets, since the normal attach mechanisms don't work on
1914 stopped processes on some native platforms (e.g. GNU/Linux). */
1917 disconnect_command (char *args
, int from_tty
)
1919 dont_repeat (); /* Not for the faint of heart */
1920 target_disconnect (args
, from_tty
);
1921 #if defined(SOLIB_RESTART)
1924 if (deprecated_detach_hook
)
1925 deprecated_detach_hook ();
1928 /* Stop the execution of the target while running in async mode, in
1931 interrupt_target_command (char *args
, int from_tty
)
1933 if (event_loop_p
&& target_can_async_p ())
1935 dont_repeat (); /* Not for the faint of heart */
1941 print_float_info (struct gdbarch
*gdbarch
, struct ui_file
*file
,
1942 struct frame_info
*frame
, const char *args
)
1944 if (!target_has_registers
)
1945 error ("The program has no registers now.");
1946 if (deprecated_selected_frame
== NULL
)
1947 error ("No selected frame.");
1949 if (gdbarch_print_float_info_p (gdbarch
))
1950 gdbarch_print_float_info (gdbarch
, file
, frame
, args
);
1954 int printed_something
= 0;
1956 for (regnum
= 0; regnum
< NUM_REGS
+ NUM_PSEUDO_REGS
; regnum
++)
1958 if (gdbarch_register_reggroup_p (gdbarch
, regnum
, float_reggroup
))
1960 printed_something
= 1;
1961 gdbarch_print_registers_info (gdbarch
, file
, frame
, regnum
, 1);
1964 if (!printed_something
)
1965 fprintf_filtered (file
, "\
1966 No floating-point info available for this processor.\n");
1971 float_info (char *args
, int from_tty
)
1973 print_float_info (current_gdbarch
, gdb_stdout
, deprecated_selected_frame
, args
);
1977 unset_command (char *args
, int from_tty
)
1979 printf_filtered ("\"unset\" must be followed by the name of ");
1980 printf_filtered ("an unset subcommand.\n");
1981 help_list (unsetlist
, "unset ", -1, gdb_stdout
);
1985 _initialize_infcmd (void)
1987 struct cmd_list_element
*c
;
1989 c
= add_com ("tty", class_run
, tty_command
,
1990 "Set terminal for future runs of program being debugged.");
1991 set_cmd_completer (c
, filename_completer
);
1993 c
= add_set_cmd ("args", class_run
, var_string_noescape
,
1994 (char *) &inferior_args
,
1995 "Set argument list to give program being debugged when it is started.\n\
1996 Follow this command with any number of args, to be passed to the program.",
1998 set_cmd_completer (c
, filename_completer
);
1999 set_cmd_sfunc (c
, notice_args_set
);
2000 c
= add_show_from_set (c
, &showlist
);
2001 set_cmd_sfunc (c
, notice_args_read
);
2004 ("environment", no_class
, environment_info
,
2005 "The environment to give the program, or one variable's value.\n\
2006 With an argument VAR, prints the value of environment variable VAR to\n\
2007 give the program being debugged. With no arguments, prints the entire\n\
2008 environment to be given to the program.", &showlist
);
2009 set_cmd_completer (c
, noop_completer
);
2011 add_prefix_cmd ("unset", no_class
, unset_command
,
2012 "Complement to certain \"set\" commands.",
2013 &unsetlist
, "unset ", 0, &cmdlist
);
2015 c
= add_cmd ("environment", class_run
, unset_environment_command
,
2016 "Cancel environment variable VAR for the program.\n\
2017 This does not affect the program until the next \"run\" command.",
2019 set_cmd_completer (c
, noop_completer
);
2021 c
= add_cmd ("environment", class_run
, set_environment_command
,
2022 "Set environment variable value to give the program.\n\
2023 Arguments are VAR VALUE where VAR is variable name and VALUE is value.\n\
2024 VALUES of environment variables are uninterpreted strings.\n\
2025 This does not affect the program until the next \"run\" command.",
2027 set_cmd_completer (c
, noop_completer
);
2029 c
= add_com ("path", class_files
, path_command
,
2030 "Add directory DIR(s) to beginning of search path for object files.\n\
2031 $cwd in the path means the current working directory.\n\
2032 This path is equivalent to the $PATH shell variable. It is a list of\n\
2033 directories, separated by colons. These directories are searched to find\n\
2034 fully linked executable files and separately compiled object files as needed.");
2035 set_cmd_completer (c
, filename_completer
);
2037 c
= add_cmd ("paths", no_class
, path_info
,
2038 "Current search path for finding object files.\n\
2039 $cwd in the path means the current working directory.\n\
2040 This path is equivalent to the $PATH shell variable. It is a list of\n\
2041 directories, separated by colons. These directories are searched to find\n\
2042 fully linked executable files and separately compiled object files as needed.",
2044 set_cmd_completer (c
, noop_completer
);
2046 add_com ("attach", class_run
, attach_command
,
2047 "Attach to a process or file outside of GDB.\n\
2048 This command attaches to another target, of the same type as your last\n\
2049 \"target\" command (\"info files\" will show your target stack).\n\
2050 The command may take as argument a process id or a device file.\n\
2051 For a process id, you must have permission to send the process a signal,\n\
2052 and it must have the same effective uid as the debugger.\n\
2053 When using \"attach\" with a process id, the debugger finds the\n\
2054 program running in the process, looking first in the current working\n\
2055 directory, or (if not found there) using the source file search path\n\
2056 (see the \"directory\" command). You can also use the \"file\" command\n\
2057 to specify the program, and to load its symbol table.");
2059 add_com ("detach", class_run
, detach_command
,
2060 "Detach a process or file previously attached.\n\
2061 If a process, it is no longer traced, and it continues its execution. If\n\
2062 you were debugging a file, the file is closed and gdb no longer accesses it.");
2064 add_com ("disconnect", class_run
, disconnect_command
,
2065 "Disconnect from a target.\n\
2066 The target will wait for another debugger to connect. Not available for\n\
2069 add_com ("signal", class_run
, signal_command
,
2070 "Continue program giving it signal specified by the argument.\n\
2071 An argument of \"0\" means continue program without giving it a signal.");
2073 add_com ("stepi", class_run
, stepi_command
,
2074 "Step one instruction exactly.\n\
2075 Argument N means do this N times (or till program stops for another reason).");
2076 add_com_alias ("si", "stepi", class_alias
, 0);
2078 add_com ("nexti", class_run
, nexti_command
,
2079 "Step one instruction, but proceed through subroutine calls.\n\
2080 Argument N means do this N times (or till program stops for another reason).");
2081 add_com_alias ("ni", "nexti", class_alias
, 0);
2083 add_com ("finish", class_run
, finish_command
,
2084 "Execute until selected stack frame returns.\n\
2085 Upon return, the value returned is printed and put in the value history.");
2087 add_com ("next", class_run
, next_command
,
2088 "Step program, proceeding through subroutine calls.\n\
2089 Like the \"step\" command as long as subroutine calls do not happen;\n\
2090 when they do, the call is treated as one instruction.\n\
2091 Argument N means do this N times (or till program stops for another reason).");
2092 add_com_alias ("n", "next", class_run
, 1);
2094 add_com_alias ("S", "next", class_run
, 1);
2096 add_com ("step", class_run
, step_command
,
2097 "Step program until it reaches a different source line.\n\
2098 Argument N means do this N times (or till program stops for another reason).");
2099 add_com_alias ("s", "step", class_run
, 1);
2101 c
= add_com ("until", class_run
, until_command
,
2102 "Execute until the program reaches a source line greater than the current\n\
2103 or a specified location (same args as break command) within the current frame.");
2104 set_cmd_completer (c
, location_completer
);
2105 add_com_alias ("u", "until", class_run
, 1);
2107 c
= add_com ("advance", class_run
, advance_command
,
2108 "Continue the program up to the given location (same form as args for break command).\n\
2109 Execution will also stop upon exit from the current stack frame.");
2110 set_cmd_completer (c
, location_completer
);
2112 c
= add_com ("jump", class_run
, jump_command
,
2113 "Continue program being debugged at specified line or address.\n\
2114 Give as argument either LINENUM or *ADDR, where ADDR is an expression\n\
2115 for an address to start at.");
2116 set_cmd_completer (c
, location_completer
);
2120 c
= add_com ("go", class_run
, go_command
,
2121 "Usage: go <location>\n\
2122 Continue program being debugged, stopping at specified line or \n\
2124 Give as argument either LINENUM or *ADDR, where ADDR is an \n\
2125 expression for an address to start at.\n\
2126 This command is a combination of tbreak and jump.");
2127 set_cmd_completer (c
, location_completer
);
2131 add_com_alias ("g", "go", class_run
, 1);
2133 add_com ("continue", class_run
, continue_command
,
2134 "Continue program being debugged, after signal or breakpoint.\n\
2135 If proceeding from breakpoint, a number N may be used as an argument,\n\
2136 which means to set the ignore count of that breakpoint to N - 1 (so that\n\
2137 the breakpoint won't break until the Nth time it is reached).");
2138 add_com_alias ("c", "cont", class_run
, 1);
2139 add_com_alias ("fg", "cont", class_run
, 1);
2141 c
= add_com ("run", class_run
, run_command
,
2142 "Start debugged program. You may specify arguments to give it.\n\
2143 Args may include \"*\", or \"[...]\"; they are expanded using \"sh\".\n\
2144 Input and output redirection with \">\", \"<\", or \">>\" are also allowed.\n\n\
2145 With no arguments, uses arguments last specified (with \"run\" or \"set args\").\n\
2146 To cancel previous arguments and run with no arguments,\n\
2147 use \"set args\" without arguments.");
2148 set_cmd_completer (c
, filename_completer
);
2149 add_com_alias ("r", "run", class_run
, 1);
2151 add_com ("R", class_run
, run_no_args_command
,
2152 "Start debugged program with no arguments.");
2154 add_com ("interrupt", class_run
, interrupt_target_command
,
2155 "Interrupt the execution of the debugged program.");
2157 add_info ("registers", nofp_registers_info
,
2158 "List of integer registers and their contents, for selected stack frame.\n\
2159 Register name as argument means describe only that register.");
2160 add_info_alias ("r", "registers", 1);
2163 add_com ("lr", class_info
, nofp_registers_info
,
2164 "List of integer registers and their contents, for selected stack frame.\n\
2165 Register name as argument means describe only that register.");
2166 add_info ("all-registers", all_registers_info
,
2167 "List of all registers and their contents, for selected stack frame.\n\
2168 Register name as argument means describe only that register.");
2170 add_info ("program", program_info
,
2171 "Execution status of the program.");
2173 add_info ("float", float_info
,
2174 "Print the status of the floating point unit\n");
2176 add_info ("vector", vector_info
,
2177 "Print the status of the vector unit\n");
2179 inferior_environ
= make_environ ();
2180 init_environ (inferior_environ
);