1 /* Memory-access and commands for "inferior" process, for GDB.
2 Copyright 1986, 87, 88, 89, 91, 92, 95, 96, 1998
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, Boston, MA 02111-1307, USA. */
23 #include "gdb_string.h"
36 #include "event-loop.h"
38 /* Functions exported for general use: */
40 void nofp_registers_info
PARAMS ((char *, int));
42 void all_registers_info
PARAMS ((char *, int));
44 void registers_info
PARAMS ((char *, int));
46 /* Local functions: */
48 void continue_command
PARAMS ((char *, int));
50 static void finish_command_continuation
PARAMS ((struct continuation_arg
*));
52 static void until_next_command
PARAMS ((int));
54 static void until_command
PARAMS ((char *, int));
56 static void path_info
PARAMS ((char *, int));
58 static void path_command
PARAMS ((char *, int));
60 static void unset_command
PARAMS ((char *, int));
62 static void float_info
PARAMS ((char *, int));
64 static void detach_command
PARAMS ((char *, int));
66 #if !defined (DO_REGISTERS_INFO)
67 static void do_registers_info
PARAMS ((int, int));
70 static void unset_environment_command
PARAMS ((char *, int));
72 static void set_environment_command
PARAMS ((char *, int));
74 static void environment_info
PARAMS ((char *, int));
76 static void program_info
PARAMS ((char *, int));
78 static void finish_command
PARAMS ((char *, int));
80 static void signal_command
PARAMS ((char *, int));
82 static void jump_command
PARAMS ((char *, int));
84 static void step_1
PARAMS ((int, int, char *));
86 void nexti_command
PARAMS ((char *, int));
88 void stepi_command
PARAMS ((char *, int));
90 static void next_command
PARAMS ((char *, int));
92 static void step_command
PARAMS ((char *, int));
94 static void run_command
PARAMS ((char *, int));
96 static void run_no_args_command
PARAMS ((char *args
, int from_tty
));
98 static void go_command
PARAMS ((char *line_no
, int from_tty
));
100 static int strip_bg_char
PARAMS ((char **));
102 void _initialize_infcmd
PARAMS ((void));
104 #define GO_USAGE "Usage: go <location>\n"
106 static void breakpoint_auto_delete_contents
PARAMS ((PTR
));
108 #define ERROR_NO_INFERIOR \
109 if (!target_has_execution) error ("The program is not being run.");
111 /* String containing arguments to give to the program, separated by spaces.
112 Empty string (pointer to '\0') means no args. */
114 static char *inferior_args
;
116 /* File name for default use for standard in/out in the inferior. */
118 char *inferior_io_terminal
;
120 /* Pid of our debugged inferior, or 0 if no inferior now.
121 Since various parts of infrun.c test this to see whether there is a program
122 being debugged it should be nonzero (currently 3 is used) for remote
127 /* Last signal that the inferior received (why it stopped). */
129 enum target_signal stop_signal
;
131 /* Address at which inferior stopped. */
135 /* Chain containing status of breakpoint(s) that we have stopped at. */
139 /* Flag indicating that a command has proceeded the inferior past the
140 current breakpoint. */
142 int breakpoint_proceeded
;
144 /* Nonzero if stopped due to a step command. */
148 /* Nonzero if stopped due to completion of a stack dummy routine. */
150 int stop_stack_dummy
;
152 /* Nonzero if stopped due to a random (unexpected) signal in inferior
155 int stopped_by_random_signal
;
157 /* Range to single step within.
158 If this is nonzero, respond to a single-step signal
159 by continuing to step if the pc is in this range. */
161 CORE_ADDR step_range_start
; /* Inclusive */
162 CORE_ADDR step_range_end
; /* Exclusive */
164 /* Stack frame address as of when stepping command was issued.
165 This is how we know when we step into a subroutine call,
166 and how to set the frame for the breakpoint used to step out. */
168 CORE_ADDR step_frame_address
;
170 /* Our notion of the current stack pointer. */
174 /* 1 means step over all subroutine calls.
175 0 means don't step over calls (used by stepi).
176 -1 means step over calls to undebuggable functions. */
180 /* If stepping, nonzero means step count is > 1
181 so don't print frame next time inferior stops
182 if it stops due to stepping. */
186 /* Environment to use for running inferior,
187 in format described in environ.h. */
189 struct environ
*inferior_environ
;
192 /* This function detects whether or not a '&' character (indicating
193 background execution) has been added as *the last* of the arguments ARGS
194 of a command. If it has, it removes it and returns 1. Otherwise it
195 does nothing and returns 0. */
202 p
= strchr (*args
, '&');
206 if (p
== (*args
+ strlen (*args
) - 1))
208 if (strlen (*args
) >1)
212 while (*p
== ' ' || *p
== '\t');
225 tty_command (file
, from_tty
)
230 error_no_arg ("terminal name for running target process");
232 inferior_io_terminal
= savestring (file
, strlen (file
));
236 run_command (args
, from_tty
)
244 if (inferior_pid
!= 0 && target_has_execution
)
247 !query ("The program being debugged has been started already.\n\
248 Start it from the beginning? "))
249 error ("Program not restarted.");
251 #if defined(SOLIB_RESTART)
254 init_wait_for_inferior ();
257 clear_breakpoint_hit_counts ();
259 exec_file
= (char *) get_exec_file (0);
261 /* Purge old solib objfiles. */
262 objfile_purge_solibs ();
264 do_run_cleanups (NULL
);
266 /* The exec file is re-read every time we do a generic_mourn_inferior, so
267 we just have to worry about the symbol file. */
270 /* We keep symbols from add-symbol-file, on the grounds that the
271 user might want to add some symbols before running the program
272 (right?). But sometimes (dynamic loading where the user manually
273 introduces the new symbols with add-symbol-file), the code which
274 the symbols describe does not persist between runs. Currently
275 the user has to manually nuke all symbols between runs if they
276 want them to go away (PR 2207). This is probably reasonable. */
283 int async_exec
= strip_bg_char (&args
);
285 /* If we get a request for running in the bg but the target
286 doesn't support it, error out. */
287 if (async_p
&& async_exec
&& !target_has_async
)
288 error ("Asynchronous execution not supported on this target.");
290 /* If we don't get a request of running in the bg, then we need
291 to simulate synchronous (fg) execution. */
292 if (async_p
&& !async_exec
&& target_has_async
)
294 /* Simulate synchronous execution */
298 /* If there were other args, beside '&', process them. */
301 cmd
= concat ("set args ", args
, NULL
);
302 make_cleanup (free
, cmd
);
303 execute_command (cmd
, from_tty
);
309 puts_filtered("Starting program: ");
311 puts_filtered(exec_file
);
313 puts_filtered(inferior_args
);
315 gdb_flush (gdb_stdout
);
318 target_create_inferior (exec_file
, inferior_args
,
319 environ_vector (inferior_environ
));
324 run_no_args_command (args
, from_tty
)
328 execute_command("set args", from_tty
);
329 run_command((char *)NULL
, from_tty
);
334 continue_command (proc_count_exp
, from_tty
)
335 char *proc_count_exp
;
341 /* Find out whether we must run in the background. */
342 if (proc_count_exp
!= NULL
)
343 async_exec
= strip_bg_char (&proc_count_exp
);
345 /* If we must run in the background, but the target can't do it,
347 if (async_p
&& async_exec
&& !target_has_async
)
348 error ("Asynchronous execution not supported on this target.");
350 /* If we are not asked to run in the bg, then prepare to run in the
351 foreground, synchronously. */
352 if (async_p
&& !async_exec
&& target_has_async
)
354 /* Simulate synchronous execution */
358 /* If have argument (besides '&'), set proceed count of breakpoint
360 if (proc_count_exp
!= NULL
)
362 bpstat bs
= stop_bpstat
;
363 int num
= bpstat_num (&bs
);
364 if (num
== 0 && from_tty
)
367 ("Not stopped at any breakpoint; argument ignored.\n");
371 set_ignore_count (num
,
372 parse_and_eval_address (proc_count_exp
) - 1,
374 /* set_ignore_count prints a message ending with a period.
375 So print two spaces before "Continuing.". */
377 printf_filtered (" ");
378 num
= bpstat_num (&bs
);
383 printf_filtered ("Continuing.\n");
385 clear_proceed_status ();
387 proceed ((CORE_ADDR
) -1, TARGET_SIGNAL_DEFAULT
, 0);
390 /* Step until outside of current statement. */
394 step_command (count_string
, from_tty
)
398 step_1 (0, 0, count_string
);
401 /* Likewise, but skip over subroutine calls as if single instructions. */
405 next_command (count_string
, from_tty
)
409 step_1 (1, 0, count_string
);
412 /* Likewise, but step only one instruction. */
416 stepi_command (count_string
, from_tty
)
420 step_1 (0, 1, count_string
);
425 nexti_command (count_string
, from_tty
)
429 step_1 (1, 1, count_string
);
433 step_1 (skip_subroutines
, single_inst
, count_string
)
434 int skip_subroutines
;
438 register int count
= 1;
439 struct frame_info
*frame
;
440 struct cleanup
*cleanups
= 0;
446 async_exec
= strip_bg_char (&count_string
);
448 /* If we get a request for running in the bg but the target
449 doesn't support it, error out. */
450 if (async_p
&& async_exec
&& !target_has_async
)
451 error ("Asynchronous execution not supported on this target.");
453 /* If we don't get a request of running in the bg, then we need
454 to simulate synchronous (fg) execution. */
455 if (async_p
&& !async_exec
&& target_has_async
)
457 /* Simulate synchronous execution */
461 count
= count_string
? parse_and_eval_address (count_string
) : 1;
463 if (!single_inst
|| skip_subroutines
) /* leave si command alone */
465 enable_longjmp_breakpoint();
466 cleanups
= make_cleanup ((make_cleanup_func
) disable_longjmp_breakpoint
,
470 for (; count
> 0; count
--)
472 clear_proceed_status ();
474 frame
= get_current_frame ();
475 if (!frame
) /* Avoid coredump here. Why tho? */
476 error ("No current frame");
477 step_frame_address
= FRAME_FP (frame
);
478 step_sp
= read_sp ();
482 find_pc_line_pc_range (stop_pc
, &step_range_start
, &step_range_end
);
483 if (step_range_end
== 0)
486 if (find_pc_partial_function (stop_pc
, &name
, &step_range_start
,
487 &step_range_end
) == 0)
488 error ("Cannot find bounds of current function");
490 target_terminal_ours ();
492 Single stepping until exit from function %s, \n\
493 which has no line number information.\n", name
);
498 /* Say we are stepping, but stop after one insn whatever it does. */
499 step_range_start
= step_range_end
= 1;
500 if (!skip_subroutines
)
502 Don't step over function calls, not even to functions lacking
507 if (skip_subroutines
)
510 step_multi
= (count
> 1);
511 proceed ((CORE_ADDR
) -1, TARGET_SIGNAL_DEFAULT
, 1);
515 /* FIXME: On nexti, this may have already been done (when we hit the
516 step resume break, I think). Probably this should be moved to
517 wait_for_inferior (near the top). */
518 #if defined (SHIFT_INST_REGS)
523 if (!single_inst
|| skip_subroutines
)
524 do_cleanups(cleanups
);
527 /* Continue program at specified address. */
530 jump_command (arg
, from_tty
)
534 register CORE_ADDR addr
;
535 struct symtabs_and_lines sals
;
536 struct symtab_and_line sal
;
543 /* Find out whether we must run in the background. */
545 async_exec
= strip_bg_char (&arg
);
547 /* If we must run in the background, but the target can't do it,
549 if (async_p
&& async_exec
&& !target_has_async
)
550 error ("Asynchronous execution not supported on this target.");
552 /* If we are not asked to run in the bg, then prepare to run in the
553 foreground, synchronously. */
554 if (async_p
&& !async_exec
&& target_has_async
)
556 /* Simulate synchronous execution */
561 error_no_arg ("starting address");
563 sals
= decode_line_spec_1 (arg
, 1);
566 error ("Unreasonable jump request");
570 free ((PTR
)sals
.sals
);
572 if (sal
.symtab
== 0 && sal
.pc
== 0)
573 error ("No source file has been specified.");
575 resolve_sal_pc (&sal
); /* May error out */
577 /* See if we are trying to jump to another function. */
578 fn
= get_frame_function (get_current_frame ());
579 sfn
= find_pc_function (sal
.pc
);
580 if (fn
!= NULL
&& sfn
!= fn
)
582 if (!query ("Line %d is not in `%s'. Jump anyway? ", sal
.line
,
583 SYMBOL_SOURCE_NAME (fn
)))
585 error ("Not confirmed.");
592 fixup_symbol_section (sfn
, 0);
593 if (section_is_overlay (SYMBOL_BFD_SECTION (sfn
)) &&
594 !section_is_mapped (SYMBOL_BFD_SECTION (sfn
)))
596 if (!query ("WARNING!!! Destination is in unmapped overlay! Jump anyway? "))
598 error ("Not confirmed.");
608 printf_filtered ("Continuing at ");
609 print_address_numeric (addr
, 1, gdb_stdout
);
610 printf_filtered (".\n");
613 clear_proceed_status ();
614 proceed (addr
, TARGET_SIGNAL_0
, 0);
618 /* Go to line or address in current procedure */
620 go_command (line_no
, from_tty
)
624 if (line_no
== (char *)NULL
|| !*line_no
)
625 printf_filtered (GO_USAGE
);
628 tbreak_command (line_no
, from_tty
);
629 jump_command (line_no
, from_tty
);
634 /* Continue program giving it specified signal. */
637 signal_command (signum_exp
, from_tty
)
641 enum target_signal oursig
;
643 dont_repeat (); /* Too dangerous. */
647 error_no_arg ("signal number");
649 /* It would be even slicker to make signal names be valid expressions,
650 (the type could be "enum $signal" or some such), then the user could
651 assign them to convenience variables. */
652 oursig
= target_signal_from_name (signum_exp
);
654 if (oursig
== TARGET_SIGNAL_UNKNOWN
)
656 /* No, try numeric. */
657 int num
= parse_and_eval_address (signum_exp
);
660 oursig
= TARGET_SIGNAL_0
;
662 oursig
= target_signal_from_command (num
);
667 if (oursig
== TARGET_SIGNAL_0
)
668 printf_filtered ("Continuing with no signal.\n");
670 printf_filtered ("Continuing with signal %s.\n",
671 target_signal_to_name (oursig
));
674 clear_proceed_status ();
675 /* "signal 0" should not get stuck if we are stopped at a breakpoint.
676 FIXME: Neither should "signal foo" but when I tried passing
677 (CORE_ADDR)-1 unconditionally I got a testsuite failure which I haven't
678 tried to track down yet. */
679 proceed (oursig
== TARGET_SIGNAL_0
? (CORE_ADDR
) -1 : stop_pc
, oursig
, 0);
682 /* Call breakpoint_auto_delete on the current contents of the bpstat
683 pointed to by arg (which is really a bpstat *). */
686 breakpoint_auto_delete_contents (arg
)
689 breakpoint_auto_delete (*(bpstat
*)arg
);
693 /* Execute a "stack dummy", a piece of code stored in the stack
694 by the debugger to be executed in the inferior.
696 To call: first, do PUSH_DUMMY_FRAME.
697 Then push the contents of the dummy. It should end with a breakpoint insn.
698 Then call here, passing address at which to start the dummy.
700 The contents of all registers are saved before the dummy frame is popped
701 and copied into the buffer BUFFER.
703 The dummy's frame is automatically popped whenever that break is hit.
704 If that is the first time the program stops, run_stack_dummy
705 returns to its caller with that frame already gone and returns 0.
706 Otherwise, run_stack-dummy returns 1 (the frame will eventually be popped
707 when we do hit that breakpoint). */
709 /* DEBUG HOOK: 4 => return instead of letting the stack dummy run. */
711 static int stack_dummy_testing
= 0;
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 ();
722 if (stack_dummy_testing
& 4)
727 if (CALL_DUMMY_BREAKPOINT_OFFSET_P
)
729 struct breakpoint
*bpt
;
730 struct symtab_and_line sal
;
732 INIT_SAL (&sal
); /* initialize to zeroes */
733 if (CALL_DUMMY_LOCATION
== AT_ENTRY_POINT
)
735 sal
.pc
= CALL_DUMMY_ADDRESS ();
739 sal
.pc
= addr
- CALL_DUMMY_START_OFFSET
+ CALL_DUMMY_BREAKPOINT_OFFSET
;
741 sal
.section
= find_pc_overlay (sal
.pc
);
743 /* Set up a FRAME for the dummy frame so we can pass it to
744 set_momentary_breakpoint. We need to give the breakpoint a
745 frame in case there is only one copy of the dummy (e.g.
746 CALL_DUMMY_LOCATION == AFTER_TEXT_END). */
747 flush_cached_frames ();
748 set_current_frame (create_new_frame (read_fp (), sal
.pc
));
750 /* If defined, CALL_DUMMY_BREAKPOINT_OFFSET is where we need to put
751 a breakpoint instruction. If not, the call dummy already has the
752 breakpoint instruction in it.
754 addr is the address of the call dummy plus the CALL_DUMMY_START_OFFSET,
755 so we need to subtract the CALL_DUMMY_START_OFFSET. */
756 bpt
= set_momentary_breakpoint (sal
,
757 get_current_frame (),
759 bpt
->disposition
= del
;
761 /* If all error()s out of proceed ended up calling normal_stop (and
762 perhaps they should; it already does in the special case of error
763 out of resume()), then we wouldn't need this. */
764 make_cleanup (breakpoint_auto_delete_contents
, &stop_bpstat
);
767 disable_watchpoints_before_interactive_call_start ();
768 proceed_to_finish
= 1; /* We want stop_registers, please... */
769 proceed (addr
, TARGET_SIGNAL_0
, 0);
770 enable_watchpoints_after_interactive_call_stop ();
772 discard_cleanups (old_cleanups
);
774 if (!stop_stack_dummy
)
777 /* On return, the stack dummy has been popped already. */
779 memcpy (buffer
, stop_registers
, REGISTER_BYTES
);
783 /* Proceed until we reach a different source line with pc greater than
784 our current one or exit the function. We skip calls in both cases.
786 Note that eventually this command should probably be changed so
787 that only source lines are printed out when we hit the breakpoint
788 we set. This may involve changes to wait_for_inferior and the
789 proceed status code. */
793 until_next_command (from_tty
)
796 struct frame_info
*frame
;
799 struct symtab_and_line sal
;
801 clear_proceed_status ();
803 frame
= get_current_frame ();
805 /* Step until either exited from this function or greater
806 than the current line (if in symbolic section) or pc (if
810 func
= find_pc_function (pc
);
814 struct minimal_symbol
*msymbol
= lookup_minimal_symbol_by_pc (pc
);
817 error ("Execution is not within a known function.");
819 step_range_start
= SYMBOL_VALUE_ADDRESS (msymbol
);
824 sal
= find_pc_line (pc
, 0);
826 step_range_start
= BLOCK_START (SYMBOL_BLOCK_VALUE (func
));
827 step_range_end
= sal
.end
;
831 step_frame_address
= FRAME_FP (frame
);
832 step_sp
= read_sp ();
834 step_multi
= 0; /* Only one call to proceed */
836 proceed ((CORE_ADDR
) -1, TARGET_SIGNAL_DEFAULT
, 1);
840 until_command (arg
, from_tty
)
846 if (!target_has_execution
)
847 error ("The program is not running.");
849 /* Find out whether we must run in the background. */
851 async_exec
= strip_bg_char (&arg
);
853 /* If we must run in the background, but the target can't do it,
855 if (async_p
&& async_exec
&& !target_has_async
)
856 error ("Asynchronous execution not supported on this target.");
858 /* If we are not asked to run in the bg, then prepare to run in the
859 foreground, synchronously. */
860 if (async_p
&& !async_exec
&& target_has_async
)
862 /* Simulate synchronous execution */
867 until_break_command (arg
, from_tty
);
869 until_next_command (from_tty
);
873 /* Stuff that needs to be done by the finish command after the target
874 has stopped. In asynchronous mode, we wait for the target to stop in
875 the call to poll or select in the event loop, so it is impossible to
876 do all the stuff as part of the finish_command function itself. The
877 only chance we have to complete this command is in
878 fetch_inferior_event, which is called by the event loop as soon as it
879 detects that the target has stopped. This function is called via the
880 cmd_continaution pointer. */
882 finish_command_continuation (arg
)
883 struct continuation_arg
*arg
;
885 register struct symbol
*function
;
886 struct breakpoint
*breakpoint
;
888 breakpoint
= (struct breakpoint
*) arg
->data
;
889 function
= (struct symbol
*) (arg
->next
)->data
;
891 if (bpstat_find_breakpoint(stop_bpstat
, breakpoint
) != NULL
894 struct type
*value_type
;
895 register value_ptr val
;
899 value_type
= TYPE_TARGET_TYPE (SYMBOL_TYPE (function
));
901 fatal ("internal: finish_command: function has no target type");
903 if (TYPE_CODE (value_type
) == TYPE_CODE_VOID
)
905 do_exec_cleanups (ALL_CLEANUPS
);
909 funcaddr
= BLOCK_START (SYMBOL_BLOCK_VALUE (function
));
911 struct_return
= using_struct_return (value_of_variable (function
, NULL
),
914 check_typedef (value_type
),
915 BLOCK_GCC_COMPILED (SYMBOL_BLOCK_VALUE (function
)));
919 val
= value_being_returned (value_type
, stop_registers
, struct_return
);
920 printf_filtered ("Value returned is $%d = ", record_latest_value (val
));
921 value_print (val
, gdb_stdout
, 0, Val_no_prettyprint
);
922 printf_filtered ("\n");
926 /* We cannot determine the contents of the structure because
927 it is on the stack, and we don't know where, since we did not
928 initiate the call, as opposed to the call_function_by_hand case */
929 #ifdef VALUE_RETURNED_FROM_STACK
931 printf_filtered ("Value returned has type: %s.",
932 TYPE_NAME (value_type
));
933 printf_filtered (" Cannot determine contents\n");
935 val
= value_being_returned (value_type
, stop_registers
,
937 printf_filtered ("Value returned is $%d = ",
938 record_latest_value (val
));
939 value_print (val
, gdb_stdout
, 0, Val_no_prettyprint
);
940 printf_filtered ("\n");
945 do_exec_cleanups (ALL_CLEANUPS
);
948 /* "finish": Set a temporary breakpoint at the place
949 the selected frame will return to, then continue. */
952 finish_command (arg
, from_tty
)
956 struct symtab_and_line sal
;
957 register struct frame_info
*frame
;
958 register struct symbol
*function
;
959 struct breakpoint
*breakpoint
;
960 struct cleanup
*old_chain
;
961 struct continuation_arg
*arg1
, *arg2
;
965 /* Find out whether we must run in the background. */
967 async_exec
= strip_bg_char (&arg
);
969 /* If we must run in the background, but the target can't do it,
971 if (async_p
&& async_exec
&& !target_has_async
)
972 error ("Asynchronous execution not supported on this target.");
974 /* If we are not asked to run in the bg, then prepare to run in the
975 foreground, synchronously. */
976 if (async_p
&& !async_exec
&& target_has_async
)
978 /* Simulate synchronous execution */
983 error ("The \"finish\" command does not take any arguments.");
984 if (!target_has_execution
)
985 error ("The program is not running.");
986 if (selected_frame
== NULL
)
987 error ("No selected frame.");
989 frame
= get_prev_frame (selected_frame
);
991 error ("\"finish\" not meaningful in the outermost frame.");
993 clear_proceed_status ();
995 sal
= find_pc_line (frame
->pc
, 0);
998 breakpoint
= set_momentary_breakpoint (sal
, frame
, bp_finish
);
1000 if (!async_p
|| !target_has_async
)
1001 old_chain
= make_cleanup ((make_cleanup_func
) delete_breakpoint
, breakpoint
);
1003 make_exec_cleanup ((make_cleanup_func
) delete_breakpoint
, breakpoint
);
1005 /* Find the function we will return from. */
1007 function
= find_pc_function (selected_frame
->pc
);
1009 /* Print info on the selected frame, including level number
1013 printf_filtered ("Run till exit from ");
1014 print_stack_frame (selected_frame
, selected_frame_level
, 0);
1017 /* If running asynchronously and the target support asynchronous
1018 execution, set things up for the rest of the finish command to be
1019 completed later on, when gdb has detected that the target has
1020 stopped, in fetch_inferior_event. */
1021 if (async_p
&& target_has_async
)
1024 (struct continuation_arg
*) xmalloc (sizeof (struct continuation_arg
));
1026 (struct continuation_arg
*) xmalloc (sizeof (struct continuation_arg
));
1029 arg1
->data
= (PTR
) breakpoint
;
1030 arg2
->data
= (PTR
) function
;
1031 add_continuation (finish_command_continuation
, arg1
);
1034 proceed_to_finish
= 1; /* We want stop_registers, please... */
1035 proceed ((CORE_ADDR
) -1, TARGET_SIGNAL_DEFAULT
, 0);
1037 /* Do this only if not running asynchronously or if the target
1038 cannot do async execution. Otherwise, complete this command when
1039 the target actually stops, in fetch_inferior_event.*/
1040 if (!async_p
|| !target_has_async
)
1043 /* Did we stop at our breakpoint? */
1044 if (bpstat_find_breakpoint(stop_bpstat
, breakpoint
) != NULL
1047 struct type
*value_type
;
1048 register value_ptr val
;
1052 value_type
= TYPE_TARGET_TYPE (SYMBOL_TYPE (function
));
1054 fatal ("internal: finish_command: function has no target type");
1056 /* FIXME: Shouldn't we do the cleanups before returning? */
1057 if (TYPE_CODE (value_type
) == TYPE_CODE_VOID
)
1060 funcaddr
= BLOCK_START (SYMBOL_BLOCK_VALUE (function
));
1063 using_struct_return (value_of_variable (function
, NULL
),
1065 check_typedef (value_type
),
1066 BLOCK_GCC_COMPILED (SYMBOL_BLOCK_VALUE (function
)));
1071 value_being_returned (value_type
, stop_registers
, struct_return
);
1072 printf_filtered ("Value returned is $%d = ",
1073 record_latest_value (val
));
1074 value_print (val
, gdb_stdout
, 0, Val_no_prettyprint
);
1075 printf_filtered ("\n");
1079 /* We cannot determine the contents of the structure
1080 because it is on the stack, and we don't know
1081 where, since we did not initiate the call, as
1082 opposed to the call_function_by_hand case */
1083 #ifdef VALUE_RETURNED_FROM_STACK
1085 printf_filtered ("Value returned has type: %s.",
1086 TYPE_NAME (value_type
));
1087 printf_filtered (" Cannot determine contents\n");
1089 val
= value_being_returned (value_type
, stop_registers
,
1091 printf_filtered ("Value returned is $%d = ",
1092 record_latest_value (val
));
1093 value_print (val
, gdb_stdout
, 0, Val_no_prettyprint
);
1094 printf_filtered ("\n");
1098 do_cleanups(old_chain
);
1104 program_info (args
, from_tty
)
1108 bpstat bs
= stop_bpstat
;
1109 int num
= bpstat_num (&bs
);
1111 if (!target_has_execution
)
1113 printf_filtered ("The program being debugged is not being run.\n");
1117 target_files_info ();
1118 printf_filtered ("Program stopped at %s.\n",
1119 local_hex_string((unsigned long) stop_pc
));
1121 printf_filtered ("It stopped after being stepped.\n");
1124 /* There may be several breakpoints in the same place, so this
1125 isn't as strange as it seems. */
1130 printf_filtered ("It stopped at a breakpoint that has ");
1131 printf_filtered ("since been deleted.\n");
1134 printf_filtered ("It stopped at breakpoint %d.\n", num
);
1135 num
= bpstat_num (&bs
);
1138 else if (stop_signal
!= TARGET_SIGNAL_0
)
1140 printf_filtered ("It stopped with signal %s, %s.\n",
1141 target_signal_to_name (stop_signal
),
1142 target_signal_to_string (stop_signal
));
1147 printf_filtered ("Type \"info stack\" or \"info registers\" ");
1148 printf_filtered ("for more information.\n");
1153 environment_info (var
, from_tty
)
1159 register char *val
= get_in_environ (inferior_environ
, var
);
1162 puts_filtered (var
);
1163 puts_filtered (" = ");
1164 puts_filtered (val
);
1165 puts_filtered ("\n");
1169 puts_filtered ("Environment variable \"");
1170 puts_filtered (var
);
1171 puts_filtered ("\" not defined.\n");
1176 register char **vector
= environ_vector (inferior_environ
);
1179 puts_filtered (*vector
++);
1180 puts_filtered ("\n");
1186 set_environment_command (arg
, from_tty
)
1190 register char *p
, *val
, *var
;
1194 error_no_arg ("environment variable and value");
1196 /* Find seperation between variable name and value */
1197 p
= (char *) strchr (arg
, '=');
1198 val
= (char *) strchr (arg
, ' ');
1200 if (p
!= 0 && val
!= 0)
1202 /* We have both a space and an equals. If the space is before the
1203 equals, walk forward over the spaces til we see a nonspace
1204 (possibly the equals). */
1209 /* Now if the = is after the char following the spaces,
1210 take the char following the spaces. */
1214 else if (val
!= 0 && p
== 0)
1218 error_no_arg ("environment variable to set");
1220 if (p
== 0 || p
[1] == 0)
1224 p
= arg
+ strlen (arg
); /* So that savestring below will work */
1228 /* Not setting variable value to null */
1230 while (*val
== ' ' || *val
== '\t')
1234 while (p
!= arg
&& (p
[-1] == ' ' || p
[-1] == '\t')) p
--;
1236 var
= savestring (arg
, p
- arg
);
1239 printf_filtered ("Setting environment variable ");
1240 printf_filtered ("\"%s\" to null value.\n", var
);
1241 set_in_environ (inferior_environ
, var
, "");
1244 set_in_environ (inferior_environ
, var
, val
);
1249 unset_environment_command (var
, from_tty
)
1255 /* If there is no argument, delete all environment variables.
1256 Ask for confirmation if reading from the terminal. */
1257 if (!from_tty
|| query ("Delete all environment variables? "))
1259 free_environ (inferior_environ
);
1260 inferior_environ
= make_environ ();
1264 unset_in_environ (inferior_environ
, var
);
1267 /* Handle the execution path (PATH variable) */
1269 static const char path_var_name
[] = "PATH";
1273 path_info (args
, from_tty
)
1277 puts_filtered ("Executable and object file path: ");
1278 puts_filtered (get_in_environ (inferior_environ
, path_var_name
));
1279 puts_filtered ("\n");
1282 /* Add zero or more directories to the front of the execution path. */
1285 path_command (dirname
, from_tty
)
1292 env
= get_in_environ (inferior_environ
, path_var_name
);
1293 /* Can be null if path is not set */
1296 exec_path
= strsave (env
);
1297 mod_path (dirname
, &exec_path
);
1298 set_in_environ (inferior_environ
, path_var_name
, exec_path
);
1301 path_info ((char *)NULL
, from_tty
);
1305 #ifdef REGISTER_NAMES
1306 char *gdb_register_names
[] = REGISTER_NAMES
;
1308 /* Print out the machine register regnum. If regnum is -1,
1309 print all registers (fpregs == 1) or all non-float registers
1312 For most machines, having all_registers_info() print the
1313 register(s) one per line is good enough. If a different format
1314 is required, (eg, for MIPS or Pyramid 90x, which both have
1315 lots of regs), or there is an existing convention for showing
1316 all the registers, define the macro DO_REGISTERS_INFO(regnum, fp)
1317 to provide that format. */
1319 #if !defined (DO_REGISTERS_INFO)
1321 #define DO_REGISTERS_INFO(regnum, fp) do_registers_info(regnum, fp)
1324 do_registers_info (regnum
, fpregs
)
1329 int numregs
= ARCH_NUM_REGS
;
1331 for (i
= 0; i
< numregs
; i
++)
1333 char raw_buffer
[MAX_REGISTER_RAW_SIZE
];
1334 char virtual_buffer
[MAX_REGISTER_VIRTUAL_SIZE
];
1336 /* Decide between printing all regs, nonfloat regs, or specific reg. */
1338 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')
1472 } while (*addr_exp
!= '\0');
1476 all_registers_info (addr_exp
, from_tty
)
1480 registers_info (addr_exp
, 1);
1484 nofp_registers_info (addr_exp
, from_tty
)
1488 registers_info (addr_exp
, 0);
1494 * Should save/restore the tty state since it might be that the
1495 * program to be debugged was started on this tty and it wants
1496 * the tty in some state other than what we want. If it's running
1497 * on another terminal or without a terminal, then saving and
1498 * restoring the tty state is a harmless no-op.
1499 * This only needs to be done if we are attaching to a process.
1504 takes a program started up outside of gdb and ``attaches'' to it.
1505 This stops it cold in its tracks and allows us to start debugging it.
1506 and wait for the trace-trap that results from attaching. */
1509 attach_command (args
, from_tty
)
1514 extern int auto_solib_add
;
1518 char * full_exec_path
= NULL
;
1520 dont_repeat (); /* Not for the faint of heart */
1522 if (target_has_execution
)
1524 if (query ("A program is being debugged already. Kill it? "))
1527 error ("Not killed.");
1530 target_attach (args
, from_tty
);
1532 /* Set up the "saved terminal modes" of the inferior
1533 based on what modes we are starting it with. */
1534 target_terminal_init ();
1536 /* Install inferior's terminal modes. */
1537 target_terminal_inferior ();
1539 /* Set up execution context to know that we should return from
1540 wait_for_inferior as soon as the target reports a stop. */
1541 init_wait_for_inferior ();
1542 clear_proceed_status ();
1543 stop_soon_quietly
= 1;
1545 /* No traps are generated when attaching to inferior under Mach 3
1547 #ifndef ATTACH_NO_WAIT
1548 wait_for_inferior ();
1552 * If no exec file is yet known, try to determine it from the
1555 exec_file
= (char *) get_exec_file (0);
1557 exec_file
= target_pid_to_exec_file (inferior_pid
);
1559 /* It's possible we don't have a full path, but rather just a
1560 filename. Some targets, such as HP-UX, don't provide the
1563 Attempt to qualify the filename against the source path.
1564 (If that fails, we'll just fall back on the original
1565 filename. Not much more we can do...)
1567 if (!source_full_path_of (exec_file
, &full_exec_path
))
1568 full_exec_path
= savestring (exec_file
, strlen (exec_file
));
1570 exec_file_attach (full_exec_path
, from_tty
);
1571 symbol_file_command (full_exec_path
, from_tty
);
1578 /* Add shared library symbols from the newly attached process, if any. */
1579 SOLIB_ADD ((char *)0, from_tty
, ¤t_target
);
1580 re_enable_breakpoints_in_shlibs ();
1584 /* Take any necessary post-attaching actions for this platform.
1586 target_post_attach (inferior_pid
);
1593 * takes a program previously attached to and detaches it.
1594 * The program resumes execution and will no longer stop
1595 * on signals, etc. We better not have left any breakpoints
1596 * in the program or it'll die when it hits one. For this
1597 * to work, it may be necessary for the process to have been
1598 * previously attached. It *might* work if the program was
1599 * started via the normal ptrace (PTRACE_TRACEME).
1603 detach_command (args
, from_tty
)
1607 dont_repeat (); /* Not for the faint of heart */
1608 target_detach (args
, from_tty
);
1609 #if defined(SOLIB_RESTART)
1614 /* Stop the execution of the target while running in async mode, in
1617 interrupt_target_command (args
, from_tty
)
1621 if (async_p
&& target_has_async
)
1623 dont_repeat (); /* Not for the faint of heart */
1630 float_info (addr_exp
, from_tty
)
1637 printf_filtered ("No floating point info available for this processor.\n");
1643 unset_command (args
, from_tty
)
1647 printf_filtered ("\"unset\" must be followed by the name of ");
1648 printf_filtered ("an unset subcommand.\n");
1649 help_list (unsetlist
, "unset ", -1, gdb_stdout
);
1653 _initialize_infcmd ()
1655 struct cmd_list_element
*c
;
1657 add_com ("tty", class_run
, tty_command
,
1658 "Set terminal for future runs of program being debugged.");
1661 (add_set_cmd ("args", class_run
, var_string_noescape
,
1662 (char *)&inferior_args
,
1663 "Set argument list to give program being debugged when it is started.\n\
1664 Follow this command with any number of args, to be passed to the program.",
1669 ("environment", no_class
, environment_info
,
1670 "The environment to give the program, or one variable's value.\n\
1671 With an argument VAR, prints the value of environment variable VAR to\n\
1672 give the program being debugged. With no arguments, prints the entire\n\
1673 environment to be given to the program.", &showlist
);
1674 c
->completer
= noop_completer
;
1676 add_prefix_cmd ("unset", no_class
, unset_command
,
1677 "Complement to certain \"set\" commands",
1678 &unsetlist
, "unset ", 0, &cmdlist
);
1680 c
= add_cmd ("environment", class_run
, unset_environment_command
,
1681 "Cancel environment variable VAR for the program.\n\
1682 This does not affect the program until the next \"run\" command.",
1684 c
->completer
= noop_completer
;
1686 c
= add_cmd ("environment", class_run
, set_environment_command
,
1687 "Set environment variable value to give the program.\n\
1688 Arguments are VAR VALUE where VAR is variable name and VALUE is value.\n\
1689 VALUES of environment variables are uninterpreted strings.\n\
1690 This does not affect the program until the next \"run\" command.",
1692 c
->completer
= noop_completer
;
1694 add_com ("path", class_files
, path_command
,
1695 "Add directory DIR(s) to beginning of search path for object files.\n\
1696 $cwd in the path means the current working directory.\n\
1697 This path is equivalent to the $PATH shell variable. It is a list of\n\
1698 directories, separated by colons. These directories are searched to find\n\
1699 fully linked executable files and separately compiled object files as needed.");
1701 c
= add_cmd ("paths", no_class
, path_info
,
1702 "Current search path for finding object files.\n\
1703 $cwd in the path means the current working directory.\n\
1704 This path is equivalent to the $PATH shell variable. It is a list of\n\
1705 directories, separated by colons. These directories are searched to find\n\
1706 fully linked executable files and separately compiled object files as needed.",
1708 c
->completer
= noop_completer
;
1710 add_com ("attach", class_run
, attach_command
,
1711 "Attach to a process or file outside of GDB.\n\
1712 This command attaches to another target, of the same type as your last\n\
1713 \"target\" command (\"info files\" will show your target stack).\n\
1714 The command may take as argument a process id or a device file.\n\
1715 For a process id, you must have permission to send the process a signal,\n\
1716 and it must have the same effective uid as the debugger.\n\
1717 When using \"attach\" with a process id, the debugger finds the\n\
1718 program running in the process, looking first in the current working\n\
1719 directory, or (if not found there) using the source file search path\n\
1720 (see the \"directory\" command). You can also use the \"file\" command\n\
1721 to specify the program, and to load its symbol table.");
1723 add_com ("detach", class_run
, detach_command
,
1724 "Detach a process or file previously attached.\n\
1725 If a process, it is no longer traced, and it continues its execution. If\n\
1726 you were debugging a file, the file is closed and gdb no longer accesses it.");
1728 add_com ("signal", class_run
, signal_command
,
1729 "Continue program giving it signal specified by the argument.\n\
1730 An argument of \"0\" means continue program without giving it a signal.");
1732 add_com ("stepi", class_run
, stepi_command
,
1733 "Step one instruction exactly.\n\
1734 Argument N means do this N times (or till program stops for another reason).");
1735 add_com_alias ("si", "stepi", class_alias
, 0);
1737 add_com ("nexti", class_run
, nexti_command
,
1738 "Step one instruction, but proceed through subroutine calls.\n\
1739 Argument N means do this N times (or till program stops for another reason).");
1740 add_com_alias ("ni", "nexti", class_alias
, 0);
1742 add_com ("finish", class_run
, finish_command
,
1743 "Execute until selected stack frame returns.\n\
1744 Upon return, the value returned is printed and put in the value history.");
1746 add_com ("next", class_run
, next_command
,
1747 "Step program, proceeding through subroutine calls.\n\
1748 Like the \"step\" command as long as subroutine calls do not happen;\n\
1749 when they do, the call is treated as one instruction.\n\
1750 Argument N means do this N times (or till program stops for another reason).");
1751 add_com_alias ("n", "next", class_run
, 1);
1753 add_com_alias("S", "next", class_run
, 1);
1755 add_com ("step", class_run
, step_command
,
1756 "Step program until it reaches a different source line.\n\
1757 Argument N means do this N times (or till program stops for another reason).");
1758 add_com_alias ("s", "step", class_run
, 1);
1760 add_com ("until", class_run
, until_command
,
1761 "Execute until the program reaches a source line greater than the current\n\
1762 or a specified line or address or function (same args as break command).\n\
1763 Execution will also stop upon exit from the current stack frame.");
1764 add_com_alias ("u", "until", class_run
, 1);
1766 add_com ("jump", class_run
, jump_command
,
1767 "Continue program being debugged at specified line or address.\n\
1768 Give as argument either LINENUM or *ADDR, where ADDR is an expression\n\
1769 for an address to start at.");
1772 add_com ("go", class_run
, go_command
,
1773 "Usage: go <location>\n\
1774 Continue program being debugged, stopping at specified line or \n\
1776 Give as argument either LINENUM or *ADDR, where ADDR is an \n\
1777 expression for an address to start at.\n\
1778 This command is a combination of tbreak and jump.");
1781 add_com_alias("g", "go", class_run
, 1);
1783 add_com ("continue", class_run
, continue_command
,
1784 "Continue program being debugged, after signal or breakpoint.\n\
1785 If proceeding from breakpoint, a number N may be used as an argument,\n\
1786 which means to set the ignore count of that breakpoint to N - 1 (so that\n\
1787 the breakpoint won't break until the Nth time it is reached).");
1788 add_com_alias ("c", "cont", class_run
, 1);
1789 add_com_alias ("fg", "cont", class_run
, 1);
1791 add_com ("run", class_run
, run_command
,
1792 "Start debugged program. You may specify arguments to give it.\n\
1793 Args may include \"*\", or \"[...]\"; they are expanded using \"sh\".\n\
1794 Input and output redirection with \">\", \"<\", or \">>\" are also allowed.\n\n\
1795 With no arguments, uses arguments last specified (with \"run\" or \"set args\").\n\
1796 To cancel previous arguments and run with no arguments,\n\
1797 use \"set args\" without arguments.");
1798 add_com_alias ("r", "run", class_run
, 1);
1800 add_com ("R", class_run
, run_no_args_command
,
1801 "Start debugged program with no arguments.");
1803 add_com ("interrupt", class_run
, interrupt_target_command
,
1804 "Interrupt the execution of the debugged program.");
1806 add_info ("registers", nofp_registers_info
,
1807 "List of integer registers and their contents, for selected stack frame.\n\
1808 Register name as argument means describe only that register.");
1811 add_com("lr", class_info
, nofp_registers_info
,
1812 "List of integer registers and their contents, for selected stack frame.\n\
1813 Register name as argument means describe only that register.");
1814 add_info ("all-registers", all_registers_info
,
1815 "List of all registers and their contents, for selected stack frame.\n\
1816 Register name as argument means describe only that register.");
1818 add_info ("program", program_info
,
1819 "Execution status of the program.");
1821 add_info ("float", float_info
,
1822 "Print the status of the floating point unit\n");
1824 inferior_args
= savestring ("", 1); /* Initially no args */
1825 inferior_environ
= make_environ ();
1826 init_environ (inferior_environ
);