1 /* Memory-access and commands for "inferior" process, for GDB.
2 Copyright 1986, 87, 88, 89, 91, 92, 95, 96, 1998, 1999
3 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
24 #include "gdb_string.h"
37 #include "event-loop.h"
38 #include "parser-defs.h"
40 /* Functions exported for general use: */
42 void nofp_registers_info
PARAMS ((char *, int));
44 void all_registers_info
PARAMS ((char *, int));
46 void registers_info
PARAMS ((char *, int));
48 /* Local functions: */
50 void continue_command
PARAMS ((char *, int));
52 static void finish_command_continuation
PARAMS ((struct continuation_arg
*));
54 static void until_next_command
PARAMS ((int));
56 static void until_command
PARAMS ((char *, int));
58 static void path_info
PARAMS ((char *, int));
60 static void path_command
PARAMS ((char *, int));
62 static void unset_command
PARAMS ((char *, int));
64 static void float_info
PARAMS ((char *, int));
66 static void detach_command
PARAMS ((char *, int));
68 static void interrupt_target_command (char *args
, int from_tty
);
70 #if !defined (DO_REGISTERS_INFO)
71 static void do_registers_info
PARAMS ((int, int));
74 static void unset_environment_command
PARAMS ((char *, int));
76 static void set_environment_command
PARAMS ((char *, int));
78 static void environment_info
PARAMS ((char *, int));
80 static void program_info
PARAMS ((char *, int));
82 static void finish_command
PARAMS ((char *, int));
84 static void signal_command
PARAMS ((char *, int));
86 static void jump_command
PARAMS ((char *, int));
88 static void step_1
PARAMS ((int, int, char *));
90 void nexti_command
PARAMS ((char *, int));
92 void stepi_command
PARAMS ((char *, int));
94 static void next_command
PARAMS ((char *, int));
96 static void step_command
PARAMS ((char *, int));
98 static void run_command
PARAMS ((char *, int));
100 static void run_no_args_command
PARAMS ((char *args
, int from_tty
));
102 static void go_command
PARAMS ((char *line_no
, int from_tty
));
104 static int strip_bg_char
PARAMS ((char **));
106 void _initialize_infcmd
PARAMS ((void));
108 #define GO_USAGE "Usage: go <location>\n"
110 static void breakpoint_auto_delete_contents
PARAMS ((PTR
));
112 #define ERROR_NO_INFERIOR \
113 if (!target_has_execution) error ("The program is not being run.");
115 /* String containing arguments to give to the program, separated by spaces.
116 Empty string (pointer to '\0') means no args. */
118 static char *inferior_args
;
120 /* File name for default use for standard in/out in the inferior. */
122 char *inferior_io_terminal
;
124 /* Pid of our debugged inferior, or 0 if no inferior now.
125 Since various parts of infrun.c test this to see whether there is a program
126 being debugged it should be nonzero (currently 3 is used) for remote
131 /* Last signal that the inferior received (why it stopped). */
133 enum target_signal stop_signal
;
135 /* Address at which inferior stopped. */
139 /* Chain containing status of breakpoint(s) that we have stopped at. */
143 /* Flag indicating that a command has proceeded the inferior past the
144 current breakpoint. */
146 int breakpoint_proceeded
;
148 /* Nonzero if stopped due to a step command. */
152 /* Nonzero if stopped due to completion of a stack dummy routine. */
154 int stop_stack_dummy
;
156 /* Nonzero if stopped due to a random (unexpected) signal in inferior
159 int stopped_by_random_signal
;
161 /* Range to single step within.
162 If this is nonzero, respond to a single-step signal
163 by continuing to step if the pc is in this range. */
165 CORE_ADDR step_range_start
; /* Inclusive */
166 CORE_ADDR step_range_end
; /* Exclusive */
168 /* Stack frame address as of when stepping command was issued.
169 This is how we know when we step into a subroutine call,
170 and how to set the frame for the breakpoint used to step out. */
172 CORE_ADDR step_frame_address
;
174 /* Our notion of the current stack pointer. */
178 /* 1 means step over all subroutine calls.
179 0 means don't step over calls (used by stepi).
180 -1 means step over calls to undebuggable functions. */
184 /* If stepping, nonzero means step count is > 1
185 so don't print frame next time inferior stops
186 if it stops due to stepping. */
190 /* Environment to use for running inferior,
191 in format described in environ.h. */
193 struct environ
*inferior_environ
;
196 /* This function detects whether or not a '&' character (indicating
197 background execution) has been added as *the last* of the arguments ARGS
198 of a command. If it has, it removes it and returns 1. Otherwise it
199 does nothing and returns 0. */
206 p
= strchr (*args
, '&');
210 if (p
== (*args
+ strlen (*args
) - 1))
212 if (strlen (*args
) > 1)
216 while (*p
== ' ' || *p
== '\t');
229 tty_command (file
, from_tty
)
234 error_no_arg ("terminal name for running target process");
236 inferior_io_terminal
= savestring (file
, strlen (file
));
240 run_command (args
, from_tty
)
248 if (inferior_pid
!= 0 && target_has_execution
)
251 && !query ("The program being debugged has been started already.\n\
252 Start it from the beginning? "))
253 error ("Program not restarted.");
255 #if defined(SOLIB_RESTART)
258 init_wait_for_inferior ();
261 clear_breakpoint_hit_counts ();
263 exec_file
= (char *) get_exec_file (0);
265 /* Purge old solib objfiles. */
266 objfile_purge_solibs ();
268 do_run_cleanups (NULL
);
270 /* The exec file is re-read every time we do a generic_mourn_inferior, so
271 we just have to worry about the symbol file. */
274 /* We keep symbols from add-symbol-file, on the grounds that the
275 user might want to add some symbols before running the program
276 (right?). But sometimes (dynamic loading where the user manually
277 introduces the new symbols with add-symbol-file), the code which
278 the symbols describe does not persist between runs. Currently
279 the user has to manually nuke all symbols between runs if they
280 want them to go away (PR 2207). This is probably reasonable. */
287 int async_exec
= strip_bg_char (&args
);
289 /* If we get a request for running in the bg but the target
290 doesn't support it, error out. */
291 if (async_p
&& async_exec
&& !target_has_async
)
292 error ("Asynchronous execution not supported on this target.");
294 /* If we don't get a request of running in the bg, then we need
295 to simulate synchronous (fg) execution. */
296 if (async_p
&& !async_exec
&& target_has_async
)
298 /* Simulate synchronous execution */
302 /* If there were other args, beside '&', process them. */
305 cmd
= concat ("set args ", args
, NULL
);
306 make_cleanup (free
, cmd
);
307 execute_command (cmd
, from_tty
);
313 puts_filtered ("Starting program: ");
315 puts_filtered (exec_file
);
317 puts_filtered (inferior_args
);
318 puts_filtered ("\n");
319 gdb_flush (gdb_stdout
);
322 target_create_inferior (exec_file
, inferior_args
,
323 environ_vector (inferior_environ
));
328 run_no_args_command (args
, from_tty
)
332 execute_command ("set args", from_tty
);
333 run_command ((char *) NULL
, from_tty
);
338 continue_command (proc_count_exp
, from_tty
)
339 char *proc_count_exp
;
345 /* Find out whether we must run in the background. */
346 if (proc_count_exp
!= NULL
)
347 async_exec
= strip_bg_char (&proc_count_exp
);
349 /* If we must run in the background, but the target can't do it,
351 if (async_p
&& async_exec
&& !target_has_async
)
352 error ("Asynchronous execution not supported on this target.");
354 /* If we are not asked to run in the bg, then prepare to run in the
355 foreground, synchronously. */
356 if (async_p
&& !async_exec
&& target_has_async
)
358 /* Simulate synchronous execution */
362 /* If have argument (besides '&'), set proceed count of breakpoint
364 if (proc_count_exp
!= NULL
)
366 bpstat bs
= stop_bpstat
;
367 int num
= bpstat_num (&bs
);
368 if (num
== 0 && from_tty
)
371 ("Not stopped at any breakpoint; argument ignored.\n");
375 set_ignore_count (num
,
376 parse_and_eval_address (proc_count_exp
) - 1,
378 /* set_ignore_count prints a message ending with a period.
379 So print two spaces before "Continuing.". */
381 printf_filtered (" ");
382 num
= bpstat_num (&bs
);
387 printf_filtered ("Continuing.\n");
389 clear_proceed_status ();
391 proceed ((CORE_ADDR
) - 1, TARGET_SIGNAL_DEFAULT
, 0);
394 /* Step until outside of current statement. */
398 step_command (count_string
, from_tty
)
402 step_1 (0, 0, count_string
);
405 /* Likewise, but skip over subroutine calls as if single instructions. */
409 next_command (count_string
, from_tty
)
413 step_1 (1, 0, count_string
);
416 /* Likewise, but step only one instruction. */
420 stepi_command (count_string
, from_tty
)
424 step_1 (0, 1, count_string
);
429 nexti_command (count_string
, from_tty
)
433 step_1 (1, 1, count_string
);
437 step_1 (skip_subroutines
, single_inst
, count_string
)
438 int skip_subroutines
;
442 register int count
= 1;
443 struct frame_info
*frame
;
444 struct cleanup
*cleanups
= 0;
450 async_exec
= strip_bg_char (&count_string
);
452 /* If we get a request for running in the bg but the target
453 doesn't support it, error out. */
454 if (async_p
&& async_exec
&& !target_has_async
)
455 error ("Asynchronous execution not supported on this target.");
457 /* If we don't get a request of running in the bg, then we need
458 to simulate synchronous (fg) execution. */
459 if (async_p
&& !async_exec
&& target_has_async
)
461 /* Simulate synchronous execution */
465 count
= count_string
? parse_and_eval_address (count_string
) : 1;
467 if (!single_inst
|| skip_subroutines
) /* leave si command alone */
469 enable_longjmp_breakpoint ();
470 cleanups
= make_cleanup ((make_cleanup_func
) disable_longjmp_breakpoint
,
474 for (; count
> 0; count
--)
476 clear_proceed_status ();
478 frame
= get_current_frame ();
479 if (!frame
) /* Avoid coredump here. Why tho? */
480 error ("No current frame");
481 step_frame_address
= FRAME_FP (frame
);
482 step_sp
= read_sp ();
486 find_pc_line_pc_range (stop_pc
, &step_range_start
, &step_range_end
);
487 if (step_range_end
== 0)
490 if (find_pc_partial_function (stop_pc
, &name
, &step_range_start
,
491 &step_range_end
) == 0)
492 error ("Cannot find bounds of current function");
494 target_terminal_ours ();
496 Single stepping until exit from function %s, \n\
497 which has no line number information.\n", name
);
502 /* Say we are stepping, but stop after one insn whatever it does. */
503 step_range_start
= step_range_end
= 1;
504 if (!skip_subroutines
)
506 Don't step over function calls, not even to functions lacking
511 if (skip_subroutines
)
514 step_multi
= (count
> 1);
515 proceed ((CORE_ADDR
) - 1, TARGET_SIGNAL_DEFAULT
, 1);
519 /* FIXME: On nexti, this may have already been done (when we hit the
520 step resume break, I think). Probably this should be moved to
521 wait_for_inferior (near the top). */
522 #if defined (SHIFT_INST_REGS)
527 if (!single_inst
|| skip_subroutines
)
528 do_cleanups (cleanups
);
531 /* Continue program at specified address. */
534 jump_command (arg
, from_tty
)
538 register CORE_ADDR addr
;
539 struct symtabs_and_lines sals
;
540 struct symtab_and_line sal
;
547 /* Find out whether we must run in the background. */
549 async_exec
= strip_bg_char (&arg
);
551 /* If we must run in the background, but the target can't do it,
553 if (async_p
&& async_exec
&& !target_has_async
)
554 error ("Asynchronous execution not supported on this target.");
556 /* If we are not asked to run in the bg, then prepare to run in the
557 foreground, synchronously. */
558 if (async_p
&& !async_exec
&& target_has_async
)
560 /* Simulate synchronous execution */
565 error_no_arg ("starting address");
567 sals
= decode_line_spec_1 (arg
, 1);
570 error ("Unreasonable jump request");
574 free ((PTR
) sals
.sals
);
576 if (sal
.symtab
== 0 && sal
.pc
== 0)
577 error ("No source file has been specified.");
579 resolve_sal_pc (&sal
); /* May error out */
581 /* See if we are trying to jump to another function. */
582 fn
= get_frame_function (get_current_frame ());
583 sfn
= find_pc_function (sal
.pc
);
584 if (fn
!= NULL
&& sfn
!= fn
)
586 if (!query ("Line %d is not in `%s'. Jump anyway? ", sal
.line
,
587 SYMBOL_SOURCE_NAME (fn
)))
589 error ("Not confirmed.");
596 fixup_symbol_section (sfn
, 0);
597 if (section_is_overlay (SYMBOL_BFD_SECTION (sfn
)) &&
598 !section_is_mapped (SYMBOL_BFD_SECTION (sfn
)))
600 if (!query ("WARNING!!! Destination is in unmapped overlay! Jump anyway? "))
602 error ("Not confirmed.");
612 printf_filtered ("Continuing at ");
613 print_address_numeric (addr
, 1, gdb_stdout
);
614 printf_filtered (".\n");
617 clear_proceed_status ();
618 proceed (addr
, TARGET_SIGNAL_0
, 0);
622 /* Go to line or address in current procedure */
624 go_command (line_no
, from_tty
)
628 if (line_no
== (char *) NULL
|| !*line_no
)
629 printf_filtered (GO_USAGE
);
632 tbreak_command (line_no
, from_tty
);
633 jump_command (line_no
, from_tty
);
638 /* Continue program giving it specified signal. */
641 signal_command (signum_exp
, from_tty
)
645 enum target_signal oursig
;
647 dont_repeat (); /* Too dangerous. */
651 error_no_arg ("signal number");
653 /* It would be even slicker to make signal names be valid expressions,
654 (the type could be "enum $signal" or some such), then the user could
655 assign them to convenience variables. */
656 oursig
= target_signal_from_name (signum_exp
);
658 if (oursig
== TARGET_SIGNAL_UNKNOWN
)
660 /* No, try numeric. */
661 int num
= parse_and_eval_address (signum_exp
);
664 oursig
= TARGET_SIGNAL_0
;
666 oursig
= target_signal_from_command (num
);
671 if (oursig
== TARGET_SIGNAL_0
)
672 printf_filtered ("Continuing with no signal.\n");
674 printf_filtered ("Continuing with signal %s.\n",
675 target_signal_to_name (oursig
));
678 clear_proceed_status ();
679 /* "signal 0" should not get stuck if we are stopped at a breakpoint.
680 FIXME: Neither should "signal foo" but when I tried passing
681 (CORE_ADDR)-1 unconditionally I got a testsuite failure which I haven't
682 tried to track down yet. */
683 proceed (oursig
== TARGET_SIGNAL_0
? (CORE_ADDR
) - 1 : stop_pc
, oursig
, 0);
686 /* Call breakpoint_auto_delete on the current contents of the bpstat
687 pointed to by arg (which is really a bpstat *). */
690 breakpoint_auto_delete_contents (arg
)
693 breakpoint_auto_delete (*(bpstat
*) arg
);
697 /* Execute a "stack dummy", a piece of code stored in the stack
698 by the debugger to be executed in the inferior.
700 To call: first, do PUSH_DUMMY_FRAME.
701 Then push the contents of the dummy. It should end with a breakpoint insn.
702 Then call here, passing address at which to start the dummy.
704 The contents of all registers are saved before the dummy frame is popped
705 and copied into the buffer BUFFER.
707 The dummy's frame is automatically popped whenever that break is hit.
708 If that is the first time the program stops, run_stack_dummy
709 returns to its caller with that frame already gone and returns 0.
710 Otherwise, run_stack-dummy returns 1 (the frame will eventually be popped
711 when we do hit that breakpoint). */
714 run_stack_dummy (addr
, buffer
)
718 struct cleanup
*old_cleanups
= make_cleanup (null_cleanup
, 0);
720 /* Now proceed, having reached the desired place. */
721 clear_proceed_status ();
723 if (CALL_DUMMY_BREAKPOINT_OFFSET_P
)
725 struct breakpoint
*bpt
;
726 struct symtab_and_line sal
;
728 INIT_SAL (&sal
); /* initialize to zeroes */
729 if (CALL_DUMMY_LOCATION
== AT_ENTRY_POINT
)
731 sal
.pc
= CALL_DUMMY_ADDRESS ();
735 sal
.pc
= addr
- CALL_DUMMY_START_OFFSET
+ CALL_DUMMY_BREAKPOINT_OFFSET
;
737 sal
.section
= find_pc_overlay (sal
.pc
);
739 /* Set up a FRAME for the dummy frame so we can pass it to
740 set_momentary_breakpoint. We need to give the breakpoint a
741 frame in case there is only one copy of the dummy (e.g.
742 CALL_DUMMY_LOCATION == AFTER_TEXT_END). */
743 flush_cached_frames ();
744 set_current_frame (create_new_frame (read_fp (), sal
.pc
));
746 /* If defined, CALL_DUMMY_BREAKPOINT_OFFSET is where we need to put
747 a breakpoint instruction. If not, the call dummy already has the
748 breakpoint instruction in it.
750 addr is the address of the call dummy plus the CALL_DUMMY_START_OFFSET,
751 so we need to subtract the CALL_DUMMY_START_OFFSET. */
752 bpt
= set_momentary_breakpoint (sal
,
753 get_current_frame (),
755 bpt
->disposition
= del
;
757 /* If all error()s out of proceed ended up calling normal_stop (and
758 perhaps they should; it already does in the special case of error
759 out of resume()), then we wouldn't need this. */
760 make_cleanup (breakpoint_auto_delete_contents
, &stop_bpstat
);
763 disable_watchpoints_before_interactive_call_start ();
764 proceed_to_finish
= 1; /* We want stop_registers, please... */
765 proceed (addr
, TARGET_SIGNAL_0
, 0);
766 enable_watchpoints_after_interactive_call_stop ();
768 discard_cleanups (old_cleanups
);
770 if (!stop_stack_dummy
)
773 /* On return, the stack dummy has been popped already. */
775 memcpy (buffer
, stop_registers
, REGISTER_BYTES
);
779 /* Proceed until we reach a different source line with pc greater than
780 our current one or exit the function. We skip calls in both cases.
782 Note that eventually this command should probably be changed so
783 that only source lines are printed out when we hit the breakpoint
784 we set. This may involve changes to wait_for_inferior and the
785 proceed status code. */
789 until_next_command (from_tty
)
792 struct frame_info
*frame
;
795 struct symtab_and_line sal
;
797 clear_proceed_status ();
799 frame
= get_current_frame ();
801 /* Step until either exited from this function or greater
802 than the current line (if in symbolic section) or pc (if
806 func
= find_pc_function (pc
);
810 struct minimal_symbol
*msymbol
= lookup_minimal_symbol_by_pc (pc
);
813 error ("Execution is not within a known function.");
815 step_range_start
= SYMBOL_VALUE_ADDRESS (msymbol
);
820 sal
= find_pc_line (pc
, 0);
822 step_range_start
= BLOCK_START (SYMBOL_BLOCK_VALUE (func
));
823 step_range_end
= sal
.end
;
827 step_frame_address
= FRAME_FP (frame
);
828 step_sp
= read_sp ();
830 step_multi
= 0; /* Only one call to proceed */
832 proceed ((CORE_ADDR
) - 1, TARGET_SIGNAL_DEFAULT
, 1);
836 until_command (arg
, from_tty
)
842 if (!target_has_execution
)
843 error ("The program is not running.");
845 /* Find out whether we must run in the background. */
847 async_exec
= strip_bg_char (&arg
);
849 /* If we must run in the background, but the target can't do it,
851 if (async_p
&& async_exec
&& !target_has_async
)
852 error ("Asynchronous execution not supported on this target.");
854 /* If we are not asked to run in the bg, then prepare to run in the
855 foreground, synchronously. */
856 if (async_p
&& !async_exec
&& target_has_async
)
858 /* Simulate synchronous execution */
863 until_break_command (arg
, from_tty
);
865 until_next_command (from_tty
);
869 /* Stuff that needs to be done by the finish command after the target
870 has stopped. In asynchronous mode, we wait for the target to stop in
871 the call to poll or select in the event loop, so it is impossible to
872 do all the stuff as part of the finish_command function itself. The
873 only chance we have to complete this command is in
874 fetch_inferior_event, which is called by the event loop as soon as it
875 detects that the target has stopped. This function is called via the
876 cmd_continaution pointer. */
878 finish_command_continuation (arg
)
879 struct continuation_arg
*arg
;
881 register struct symbol
*function
;
882 struct breakpoint
*breakpoint
;
884 breakpoint
= (struct breakpoint
*) arg
->data
;
885 function
= (struct symbol
*) (arg
->next
)->data
;
887 if (bpstat_find_breakpoint (stop_bpstat
, breakpoint
) != NULL
890 struct type
*value_type
;
891 register value_ptr val
;
895 value_type
= TYPE_TARGET_TYPE (SYMBOL_TYPE (function
));
897 internal_error ("finish_command: function has no target type");
899 if (TYPE_CODE (value_type
) == TYPE_CODE_VOID
)
901 do_exec_cleanups (ALL_CLEANUPS
);
905 funcaddr
= BLOCK_START (SYMBOL_BLOCK_VALUE (function
));
907 struct_return
= using_struct_return (value_of_variable (function
, NULL
),
910 check_typedef (value_type
),
911 BLOCK_GCC_COMPILED (SYMBOL_BLOCK_VALUE (function
)));
915 val
= value_being_returned (value_type
, stop_registers
, struct_return
);
916 printf_filtered ("Value returned is $%d = ", record_latest_value (val
));
917 value_print (val
, gdb_stdout
, 0, Val_no_prettyprint
);
918 printf_filtered ("\n");
922 /* We cannot determine the contents of the structure because
923 it is on the stack, and we don't know where, since we did not
924 initiate the call, as opposed to the call_function_by_hand case */
925 #ifdef VALUE_RETURNED_FROM_STACK
927 printf_filtered ("Value returned has type: %s.",
928 TYPE_NAME (value_type
));
929 printf_filtered (" Cannot determine contents\n");
931 val
= value_being_returned (value_type
, stop_registers
,
933 printf_filtered ("Value returned is $%d = ",
934 record_latest_value (val
));
935 value_print (val
, gdb_stdout
, 0, Val_no_prettyprint
);
936 printf_filtered ("\n");
941 do_exec_cleanups (ALL_CLEANUPS
);
944 /* "finish": Set a temporary breakpoint at the place
945 the selected frame will return to, then continue. */
948 finish_command (arg
, from_tty
)
952 struct symtab_and_line sal
;
953 register struct frame_info
*frame
;
954 register struct symbol
*function
;
955 struct breakpoint
*breakpoint
;
956 struct cleanup
*old_chain
;
957 struct continuation_arg
*arg1
, *arg2
;
961 /* Find out whether we must run in the background. */
963 async_exec
= strip_bg_char (&arg
);
965 /* If we must run in the background, but the target can't do it,
967 if (async_p
&& async_exec
&& !target_has_async
)
968 error ("Asynchronous execution not supported on this target.");
970 /* If we are not asked to run in the bg, then prepare to run in the
971 foreground, synchronously. */
972 if (async_p
&& !async_exec
&& target_has_async
)
974 /* Simulate synchronous execution */
979 error ("The \"finish\" command does not take any arguments.");
980 if (!target_has_execution
)
981 error ("The program is not running.");
982 if (selected_frame
== NULL
)
983 error ("No selected frame.");
985 frame
= get_prev_frame (selected_frame
);
987 error ("\"finish\" not meaningful in the outermost frame.");
989 clear_proceed_status ();
991 sal
= find_pc_line (frame
->pc
, 0);
994 breakpoint
= set_momentary_breakpoint (sal
, frame
, bp_finish
);
996 if (!async_p
|| !target_has_async
)
997 old_chain
= make_cleanup ((make_cleanup_func
) delete_breakpoint
, breakpoint
);
999 make_exec_cleanup ((make_cleanup_func
) delete_breakpoint
, breakpoint
);
1001 /* Find the function we will return from. */
1003 function
= find_pc_function (selected_frame
->pc
);
1005 /* Print info on the selected frame, including level number
1009 printf_filtered ("Run till exit from ");
1010 print_stack_frame (selected_frame
, selected_frame_level
, 0);
1013 /* If running asynchronously and the target support asynchronous
1014 execution, set things up for the rest of the finish command to be
1015 completed later on, when gdb has detected that the target has
1016 stopped, in fetch_inferior_event. */
1017 if (async_p
&& target_has_async
)
1020 (struct continuation_arg
*) xmalloc (sizeof (struct continuation_arg
));
1022 (struct continuation_arg
*) xmalloc (sizeof (struct continuation_arg
));
1025 arg1
->data
= (PTR
) breakpoint
;
1026 arg2
->data
= (PTR
) function
;
1027 add_continuation (finish_command_continuation
, arg1
);
1030 proceed_to_finish
= 1; /* We want stop_registers, please... */
1031 proceed ((CORE_ADDR
) - 1, TARGET_SIGNAL_DEFAULT
, 0);
1033 /* Do this only if not running asynchronously or if the target
1034 cannot do async execution. Otherwise, complete this command when
1035 the target actually stops, in fetch_inferior_event. */
1036 if (!async_p
|| !target_has_async
)
1039 /* Did we stop at our breakpoint? */
1040 if (bpstat_find_breakpoint (stop_bpstat
, breakpoint
) != NULL
1043 struct type
*value_type
;
1044 register value_ptr val
;
1048 value_type
= TYPE_TARGET_TYPE (SYMBOL_TYPE (function
));
1050 internal_error ("finish_command: function has no target type");
1052 /* FIXME: Shouldn't we do the cleanups before returning? */
1053 if (TYPE_CODE (value_type
) == TYPE_CODE_VOID
)
1056 funcaddr
= BLOCK_START (SYMBOL_BLOCK_VALUE (function
));
1059 using_struct_return (value_of_variable (function
, NULL
),
1061 check_typedef (value_type
),
1062 BLOCK_GCC_COMPILED (SYMBOL_BLOCK_VALUE (function
)));
1067 value_being_returned (value_type
, stop_registers
, struct_return
);
1068 printf_filtered ("Value returned is $%d = ",
1069 record_latest_value (val
));
1070 value_print (val
, gdb_stdout
, 0, Val_no_prettyprint
);
1071 printf_filtered ("\n");
1075 /* We cannot determine the contents of the structure
1076 because it is on the stack, and we don't know
1077 where, since we did not initiate the call, as
1078 opposed to the call_function_by_hand case */
1079 #ifdef VALUE_RETURNED_FROM_STACK
1081 printf_filtered ("Value returned has type: %s.",
1082 TYPE_NAME (value_type
));
1083 printf_filtered (" Cannot determine contents\n");
1085 val
= value_being_returned (value_type
, stop_registers
,
1087 printf_filtered ("Value returned is $%d = ",
1088 record_latest_value (val
));
1089 value_print (val
, gdb_stdout
, 0, Val_no_prettyprint
);
1090 printf_filtered ("\n");
1094 do_cleanups (old_chain
);
1100 program_info (args
, from_tty
)
1104 bpstat bs
= stop_bpstat
;
1105 int num
= bpstat_num (&bs
);
1107 if (!target_has_execution
)
1109 printf_filtered ("The program being debugged is not being run.\n");
1113 target_files_info ();
1114 printf_filtered ("Program stopped at %s.\n",
1115 local_hex_string ((unsigned long) stop_pc
));
1117 printf_filtered ("It stopped after being stepped.\n");
1120 /* There may be several breakpoints in the same place, so this
1121 isn't as strange as it seems. */
1126 printf_filtered ("It stopped at a breakpoint that has ");
1127 printf_filtered ("since been deleted.\n");
1130 printf_filtered ("It stopped at breakpoint %d.\n", num
);
1131 num
= bpstat_num (&bs
);
1134 else if (stop_signal
!= TARGET_SIGNAL_0
)
1136 printf_filtered ("It stopped with signal %s, %s.\n",
1137 target_signal_to_name (stop_signal
),
1138 target_signal_to_string (stop_signal
));
1143 printf_filtered ("Type \"info stack\" or \"info registers\" ");
1144 printf_filtered ("for more information.\n");
1149 environment_info (var
, from_tty
)
1155 register char *val
= get_in_environ (inferior_environ
, var
);
1158 puts_filtered (var
);
1159 puts_filtered (" = ");
1160 puts_filtered (val
);
1161 puts_filtered ("\n");
1165 puts_filtered ("Environment variable \"");
1166 puts_filtered (var
);
1167 puts_filtered ("\" not defined.\n");
1172 register char **vector
= environ_vector (inferior_environ
);
1175 puts_filtered (*vector
++);
1176 puts_filtered ("\n");
1182 set_environment_command (arg
, from_tty
)
1186 register char *p
, *val
, *var
;
1190 error_no_arg ("environment variable and value");
1192 /* Find seperation between variable name and value */
1193 p
= (char *) strchr (arg
, '=');
1194 val
= (char *) strchr (arg
, ' ');
1196 if (p
!= 0 && val
!= 0)
1198 /* We have both a space and an equals. If the space is before the
1199 equals, walk forward over the spaces til we see a nonspace
1200 (possibly the equals). */
1205 /* Now if the = is after the char following the spaces,
1206 take the char following the spaces. */
1210 else if (val
!= 0 && p
== 0)
1214 error_no_arg ("environment variable to set");
1216 if (p
== 0 || p
[1] == 0)
1220 p
= arg
+ strlen (arg
); /* So that savestring below will work */
1224 /* Not setting variable value to null */
1226 while (*val
== ' ' || *val
== '\t')
1230 while (p
!= arg
&& (p
[-1] == ' ' || p
[-1] == '\t'))
1233 var
= savestring (arg
, p
- arg
);
1236 printf_filtered ("Setting environment variable ");
1237 printf_filtered ("\"%s\" to null value.\n", var
);
1238 set_in_environ (inferior_environ
, var
, "");
1241 set_in_environ (inferior_environ
, var
, val
);
1246 unset_environment_command (var
, from_tty
)
1252 /* If there is no argument, delete all environment variables.
1253 Ask for confirmation if reading from the terminal. */
1254 if (!from_tty
|| query ("Delete all environment variables? "))
1256 free_environ (inferior_environ
);
1257 inferior_environ
= make_environ ();
1261 unset_in_environ (inferior_environ
, var
);
1264 /* Handle the execution path (PATH variable) */
1266 static const char path_var_name
[] = "PATH";
1270 path_info (args
, from_tty
)
1274 puts_filtered ("Executable and object file path: ");
1275 puts_filtered (get_in_environ (inferior_environ
, path_var_name
));
1276 puts_filtered ("\n");
1279 /* Add zero or more directories to the front of the execution path. */
1282 path_command (dirname
, from_tty
)
1289 env
= get_in_environ (inferior_environ
, path_var_name
);
1290 /* Can be null if path is not set */
1293 exec_path
= strsave (env
);
1294 mod_path (dirname
, &exec_path
);
1295 set_in_environ (inferior_environ
, path_var_name
, exec_path
);
1298 path_info ((char *) NULL
, from_tty
);
1302 #ifdef REGISTER_NAMES
1303 char *gdb_register_names
[] = REGISTER_NAMES
;
1305 /* Print out the machine register regnum. If regnum is -1,
1306 print all registers (fpregs == 1) or all non-float registers
1309 For most machines, having all_registers_info() print the
1310 register(s) one per line is good enough. If a different format
1311 is required, (eg, for MIPS or Pyramid 90x, which both have
1312 lots of regs), or there is an existing convention for showing
1313 all the registers, define the macro DO_REGISTERS_INFO(regnum, fp)
1314 to provide that format. */
1316 #if !defined (DO_REGISTERS_INFO)
1318 #define DO_REGISTERS_INFO(regnum, fp) do_registers_info(regnum, fp)
1321 do_registers_info (regnum
, fpregs
)
1326 int numregs
= ARCH_NUM_REGS
;
1328 for (i
= 0; i
< numregs
; i
++)
1330 char raw_buffer
[MAX_REGISTER_RAW_SIZE
];
1331 char virtual_buffer
[MAX_REGISTER_VIRTUAL_SIZE
];
1333 /* Decide between printing all regs, nonfloat regs, or specific reg. */
1336 if (TYPE_CODE (REGISTER_VIRTUAL_TYPE (i
)) == TYPE_CODE_FLT
&& !fpregs
)
1345 /* If the register name is empty, it is undefined for this
1346 processor, so don't display anything. */
1347 if (REGISTER_NAME (i
) == NULL
|| *(REGISTER_NAME (i
)) == '\0')
1350 fputs_filtered (REGISTER_NAME (i
), gdb_stdout
);
1351 print_spaces_filtered (15 - strlen (REGISTER_NAME (i
)), gdb_stdout
);
1353 /* Get the data in raw format. */
1354 if (read_relative_register_raw_bytes (i
, raw_buffer
))
1356 printf_filtered ("*value not available*\n");
1360 /* Convert raw data to virtual format if necessary. */
1361 if (REGISTER_CONVERTIBLE (i
))
1363 REGISTER_CONVERT_TO_VIRTUAL (i
, REGISTER_VIRTUAL_TYPE (i
),
1364 raw_buffer
, virtual_buffer
);
1368 memcpy (virtual_buffer
, raw_buffer
,
1369 REGISTER_VIRTUAL_SIZE (i
));
1372 /* If virtual format is floating, print it that way, and in raw hex. */
1373 if (TYPE_CODE (REGISTER_VIRTUAL_TYPE (i
)) == TYPE_CODE_FLT
)
1377 #ifdef INVALID_FLOAT
1378 if (INVALID_FLOAT (virtual_buffer
, REGISTER_VIRTUAL_SIZE (i
)))
1379 printf_filtered ("<invalid float>");
1382 val_print (REGISTER_VIRTUAL_TYPE (i
), virtual_buffer
, 0, 0,
1383 gdb_stdout
, 0, 1, 0, Val_pretty_default
);
1385 printf_filtered ("\t(raw 0x");
1386 for (j
= 0; j
< REGISTER_RAW_SIZE (i
); j
++)
1388 register int idx
= TARGET_BYTE_ORDER
== BIG_ENDIAN
? j
1389 : REGISTER_RAW_SIZE (i
) - 1 - j
;
1390 printf_filtered ("%02x", (unsigned char) raw_buffer
[idx
]);
1392 printf_filtered (")");
1395 /* FIXME! val_print probably can handle all of these cases now... */
1397 /* Else if virtual format is too long for printf,
1398 print in hex a byte at a time. */
1399 else if (REGISTER_VIRTUAL_SIZE (i
) > (int) sizeof (long))
1402 printf_filtered ("0x");
1403 for (j
= 0; j
< REGISTER_VIRTUAL_SIZE (i
); j
++)
1404 printf_filtered ("%02x", (unsigned char) virtual_buffer
[j
]);
1406 /* Else print as integer in hex and in decimal. */
1409 val_print (REGISTER_VIRTUAL_TYPE (i
), virtual_buffer
, 0, 0,
1410 gdb_stdout
, 'x', 1, 0, Val_pretty_default
);
1411 printf_filtered ("\t");
1412 val_print (REGISTER_VIRTUAL_TYPE (i
), virtual_buffer
, 0, 0,
1413 gdb_stdout
, 0, 1, 0, Val_pretty_default
);
1416 /* The SPARC wants to print even-numbered float regs as doubles
1417 in addition to printing them as floats. */
1418 #ifdef PRINT_REGISTER_HOOK
1419 PRINT_REGISTER_HOOK (i
);
1422 printf_filtered ("\n");
1425 #endif /* no DO_REGISTERS_INFO. */
1428 registers_info (addr_exp
, fpregs
)
1432 int regnum
, numregs
;
1435 if (!target_has_registers
)
1436 error ("The program has no registers now.");
1437 if (selected_frame
== NULL
)
1438 error ("No selected frame.");
1442 DO_REGISTERS_INFO (-1, fpregs
);
1448 if (addr_exp
[0] == '$')
1451 while (*end
!= '\0' && *end
!= ' ' && *end
!= '\t')
1453 numregs
= ARCH_NUM_REGS
;
1455 regnum
= target_map_name_to_register (addr_exp
, end
- addr_exp
);
1461 if (*addr_exp
>= '0' && *addr_exp
<= '9')
1462 regnum
= atoi (addr_exp
); /* Take a number */
1463 if (regnum
>= numregs
) /* Bad name, or bad number */
1464 error ("%.*s: invalid register", end
- addr_exp
, addr_exp
);
1467 DO_REGISTERS_INFO (regnum
, fpregs
);
1470 while (*addr_exp
== ' ' || *addr_exp
== '\t')
1473 while (*addr_exp
!= '\0');
1477 all_registers_info (addr_exp
, from_tty
)
1481 registers_info (addr_exp
, 1);
1485 nofp_registers_info (addr_exp
, from_tty
)
1489 registers_info (addr_exp
, 0);
1495 * Should save/restore the tty state since it might be that the
1496 * program to be debugged was started on this tty and it wants
1497 * the tty in some state other than what we want. If it's running
1498 * on another terminal or without a terminal, then saving and
1499 * restoring the tty state is a harmless no-op.
1500 * This only needs to be done if we are attaching to a process.
1505 takes a program started up outside of gdb and ``attaches'' to it.
1506 This stops it cold in its tracks and allows us to start debugging it.
1507 and wait for the trace-trap that results from attaching. */
1510 attach_command (args
, from_tty
)
1515 extern int auto_solib_add
;
1519 char *full_exec_path
= NULL
;
1521 dont_repeat (); /* Not for the faint of heart */
1523 if (target_has_execution
)
1525 if (query ("A program is being debugged already. Kill it? "))
1528 error ("Not killed.");
1531 target_attach (args
, from_tty
);
1533 /* Set up the "saved terminal modes" of the inferior
1534 based on what modes we are starting it with. */
1535 target_terminal_init ();
1537 /* Install inferior's terminal modes. */
1538 target_terminal_inferior ();
1540 /* Set up execution context to know that we should return from
1541 wait_for_inferior as soon as the target reports a stop. */
1542 init_wait_for_inferior ();
1543 clear_proceed_status ();
1544 stop_soon_quietly
= 1;
1546 /* No traps are generated when attaching to inferior under Mach 3
1548 #ifndef ATTACH_NO_WAIT
1549 wait_for_inferior ();
1553 * If no exec file is yet known, try to determine it from the
1556 exec_file
= (char *) get_exec_file (0);
1559 exec_file
= target_pid_to_exec_file (inferior_pid
);
1562 /* It's possible we don't have a full path, but rather just a
1563 filename. Some targets, such as HP-UX, don't provide the
1566 Attempt to qualify the filename against the source path.
1567 (If that fails, we'll just fall back on the original
1568 filename. Not much more we can do...)
1570 if (!source_full_path_of (exec_file
, &full_exec_path
))
1571 full_exec_path
= savestring (exec_file
, strlen (exec_file
));
1573 exec_file_attach (full_exec_path
, from_tty
);
1574 symbol_file_command (full_exec_path
, from_tty
);
1581 /* Add shared library symbols from the newly attached process, if any. */
1582 SOLIB_ADD ((char *) 0, from_tty
, ¤t_target
);
1583 re_enable_breakpoints_in_shlibs ();
1587 /* Take any necessary post-attaching actions for this platform.
1589 target_post_attach (inferior_pid
);
1596 * takes a program previously attached to and detaches it.
1597 * The program resumes execution and will no longer stop
1598 * on signals, etc. We better not have left any breakpoints
1599 * in the program or it'll die when it hits one. For this
1600 * to work, it may be necessary for the process to have been
1601 * previously attached. It *might* work if the program was
1602 * started via the normal ptrace (PTRACE_TRACEME).
1606 detach_command (args
, from_tty
)
1610 dont_repeat (); /* Not for the faint of heart */
1611 target_detach (args
, from_tty
);
1612 #if defined(SOLIB_RESTART)
1617 /* Stop the execution of the target while running in async mode, in
1620 interrupt_target_command (args
, from_tty
)
1624 if (async_p
&& target_has_async
)
1626 dont_repeat (); /* Not for the faint of heart */
1633 float_info (addr_exp
, from_tty
)
1640 printf_filtered ("No floating point info available for this processor.\n");
1646 unset_command (args
, from_tty
)
1650 printf_filtered ("\"unset\" must be followed by the name of ");
1651 printf_filtered ("an unset subcommand.\n");
1652 help_list (unsetlist
, "unset ", -1, gdb_stdout
);
1656 _initialize_infcmd ()
1658 struct cmd_list_element
*c
;
1660 add_com ("tty", class_run
, tty_command
,
1661 "Set terminal for future runs of program being debugged.");
1664 (add_set_cmd ("args", class_run
, var_string_noescape
,
1665 (char *) &inferior_args
,
1666 "Set argument list to give program being debugged when it is started.\n\
1667 Follow this command with any number of args, to be passed to the program.",
1672 ("environment", no_class
, environment_info
,
1673 "The environment to give the program, or one variable's value.\n\
1674 With an argument VAR, prints the value of environment variable VAR to\n\
1675 give the program being debugged. With no arguments, prints the entire\n\
1676 environment to be given to the program.", &showlist
);
1677 c
->completer
= noop_completer
;
1679 add_prefix_cmd ("unset", no_class
, unset_command
,
1680 "Complement to certain \"set\" commands",
1681 &unsetlist
, "unset ", 0, &cmdlist
);
1683 c
= add_cmd ("environment", class_run
, unset_environment_command
,
1684 "Cancel environment variable VAR for the program.\n\
1685 This does not affect the program until the next \"run\" command.",
1687 c
->completer
= noop_completer
;
1689 c
= add_cmd ("environment", class_run
, set_environment_command
,
1690 "Set environment variable value to give the program.\n\
1691 Arguments are VAR VALUE where VAR is variable name and VALUE is value.\n\
1692 VALUES of environment variables are uninterpreted strings.\n\
1693 This does not affect the program until the next \"run\" command.",
1695 c
->completer
= noop_completer
;
1697 add_com ("path", class_files
, path_command
,
1698 "Add directory DIR(s) to beginning of search path for object files.\n\
1699 $cwd in the path means the current working directory.\n\
1700 This path is equivalent to the $PATH shell variable. It is a list of\n\
1701 directories, separated by colons. These directories are searched to find\n\
1702 fully linked executable files and separately compiled object files as needed.");
1704 c
= add_cmd ("paths", no_class
, path_info
,
1705 "Current search path for finding object files.\n\
1706 $cwd in the path means the current working directory.\n\
1707 This path is equivalent to the $PATH shell variable. It is a list of\n\
1708 directories, separated by colons. These directories are searched to find\n\
1709 fully linked executable files and separately compiled object files as needed.",
1711 c
->completer
= noop_completer
;
1713 add_com ("attach", class_run
, attach_command
,
1714 "Attach to a process or file outside of GDB.\n\
1715 This command attaches to another target, of the same type as your last\n\
1716 \"target\" command (\"info files\" will show your target stack).\n\
1717 The command may take as argument a process id or a device file.\n\
1718 For a process id, you must have permission to send the process a signal,\n\
1719 and it must have the same effective uid as the debugger.\n\
1720 When using \"attach\" with a process id, the debugger finds the\n\
1721 program running in the process, looking first in the current working\n\
1722 directory, or (if not found there) using the source file search path\n\
1723 (see the \"directory\" command). You can also use the \"file\" command\n\
1724 to specify the program, and to load its symbol table.");
1726 add_com ("detach", class_run
, detach_command
,
1727 "Detach a process or file previously attached.\n\
1728 If a process, it is no longer traced, and it continues its execution. If\n\
1729 you were debugging a file, the file is closed and gdb no longer accesses it.");
1731 add_com ("signal", class_run
, signal_command
,
1732 "Continue program giving it signal specified by the argument.\n\
1733 An argument of \"0\" means continue program without giving it a signal.");
1735 add_com ("stepi", class_run
, stepi_command
,
1736 "Step one instruction exactly.\n\
1737 Argument N means do this N times (or till program stops for another reason).");
1738 add_com_alias ("si", "stepi", class_alias
, 0);
1740 add_com ("nexti", class_run
, nexti_command
,
1741 "Step one instruction, but proceed through subroutine calls.\n\
1742 Argument N means do this N times (or till program stops for another reason).");
1743 add_com_alias ("ni", "nexti", class_alias
, 0);
1745 add_com ("finish", class_run
, finish_command
,
1746 "Execute until selected stack frame returns.\n\
1747 Upon return, the value returned is printed and put in the value history.");
1749 add_com ("next", class_run
, next_command
,
1750 "Step program, proceeding through subroutine calls.\n\
1751 Like the \"step\" command as long as subroutine calls do not happen;\n\
1752 when they do, the call is treated as one instruction.\n\
1753 Argument N means do this N times (or till program stops for another reason).");
1754 add_com_alias ("n", "next", class_run
, 1);
1756 add_com_alias ("S", "next", class_run
, 1);
1758 add_com ("step", class_run
, step_command
,
1759 "Step program until it reaches a different source line.\n\
1760 Argument N means do this N times (or till program stops for another reason).");
1761 add_com_alias ("s", "step", class_run
, 1);
1763 add_com ("until", class_run
, until_command
,
1764 "Execute until the program reaches a source line greater than the current\n\
1765 or a specified line or address or function (same args as break command).\n\
1766 Execution will also stop upon exit from the current stack frame.");
1767 add_com_alias ("u", "until", class_run
, 1);
1769 add_com ("jump", class_run
, jump_command
,
1770 "Continue program being debugged at specified line or address.\n\
1771 Give as argument either LINENUM or *ADDR, where ADDR is an expression\n\
1772 for an address to start at.");
1775 add_com ("go", class_run
, go_command
,
1776 "Usage: go <location>\n\
1777 Continue program being debugged, stopping at specified line or \n\
1779 Give as argument either LINENUM or *ADDR, where ADDR is an \n\
1780 expression for an address to start at.\n\
1781 This command is a combination of tbreak and jump.");
1784 add_com_alias ("g", "go", class_run
, 1);
1786 add_com ("continue", class_run
, continue_command
,
1787 "Continue program being debugged, after signal or breakpoint.\n\
1788 If proceeding from breakpoint, a number N may be used as an argument,\n\
1789 which means to set the ignore count of that breakpoint to N - 1 (so that\n\
1790 the breakpoint won't break until the Nth time it is reached).");
1791 add_com_alias ("c", "cont", class_run
, 1);
1792 add_com_alias ("fg", "cont", class_run
, 1);
1794 add_com ("run", class_run
, run_command
,
1795 "Start debugged program. You may specify arguments to give it.\n\
1796 Args may include \"*\", or \"[...]\"; they are expanded using \"sh\".\n\
1797 Input and output redirection with \">\", \"<\", or \">>\" are also allowed.\n\n\
1798 With no arguments, uses arguments last specified (with \"run\" or \"set args\").\n\
1799 To cancel previous arguments and run with no arguments,\n\
1800 use \"set args\" without arguments.");
1801 add_com_alias ("r", "run", class_run
, 1);
1803 add_com ("R", class_run
, run_no_args_command
,
1804 "Start debugged program with no arguments.");
1806 add_com ("interrupt", class_run
, interrupt_target_command
,
1807 "Interrupt the execution of the debugged program.");
1809 add_info ("registers", nofp_registers_info
,
1810 "List of integer registers and their contents, for selected stack frame.\n\
1811 Register name as argument means describe only that register.");
1814 add_com ("lr", class_info
, nofp_registers_info
,
1815 "List of integer registers and their contents, for selected stack frame.\n\
1816 Register name as argument means describe only that register.");
1817 add_info ("all-registers", all_registers_info
,
1818 "List of all registers and their contents, for selected stack frame.\n\
1819 Register name as argument means describe only that register.");
1821 add_info ("program", program_info
,
1822 "Execution status of the program.");
1824 add_info ("float", float_info
,
1825 "Print the status of the floating point unit\n");
1827 inferior_args
= savestring ("", 1); /* Initially no args */
1828 inferior_environ
= make_environ ();
1829 init_environ (inferior_environ
);