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-top.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. */
284 if (event_loop_p
&& target_can_async_p ())
285 async_disable_stdin ();
290 int async_exec
= strip_bg_char (&args
);
292 /* If we get a request for running in the bg but the target
293 doesn't support it, error out. */
294 if (event_loop_p
&& async_exec
&& !target_can_async_p ())
295 error ("Asynchronous execution not supported on this target.");
297 /* If we don't get a request of running in the bg, then we need
298 to simulate synchronous (fg) execution. */
299 if (event_loop_p
&& !async_exec
&& target_can_async_p ())
301 /* Simulate synchronous execution */
302 async_disable_stdin ();
305 /* If there were other args, beside '&', process them. */
308 cmd
= concat ("set args ", args
, NULL
);
309 make_cleanup (free
, cmd
);
310 execute_command (cmd
, from_tty
);
316 puts_filtered ("Starting program: ");
318 puts_filtered (exec_file
);
320 puts_filtered (inferior_args
);
321 puts_filtered ("\n");
322 gdb_flush (gdb_stdout
);
325 target_create_inferior (exec_file
, inferior_args
,
326 environ_vector (inferior_environ
));
331 run_no_args_command (args
, from_tty
)
335 execute_command ("set args", from_tty
);
336 run_command ((char *) NULL
, from_tty
);
341 continue_command (proc_count_exp
, from_tty
)
342 char *proc_count_exp
;
348 /* Find out whether we must run in the background. */
349 if (proc_count_exp
!= NULL
)
350 async_exec
= strip_bg_char (&proc_count_exp
);
352 /* If we must run in the background, but the target can't do it,
354 if (event_loop_p
&& async_exec
&& !target_can_async_p ())
355 error ("Asynchronous execution not supported on this target.");
357 /* If we are not asked to run in the bg, then prepare to run in the
358 foreground, synchronously. */
359 if (event_loop_p
&& !async_exec
&& target_can_async_p ())
361 /* Simulate synchronous execution */
362 async_disable_stdin ();
365 /* If have argument (besides '&'), set proceed count of breakpoint
367 if (proc_count_exp
!= NULL
)
369 bpstat bs
= stop_bpstat
;
370 int num
= bpstat_num (&bs
);
371 if (num
== 0 && from_tty
)
374 ("Not stopped at any breakpoint; argument ignored.\n");
378 set_ignore_count (num
,
379 parse_and_eval_address (proc_count_exp
) - 1,
381 /* set_ignore_count prints a message ending with a period.
382 So print two spaces before "Continuing.". */
384 printf_filtered (" ");
385 num
= bpstat_num (&bs
);
390 printf_filtered ("Continuing.\n");
392 clear_proceed_status ();
394 proceed ((CORE_ADDR
) -1, TARGET_SIGNAL_DEFAULT
, 0);
397 /* Step until outside of current statement. */
401 step_command (count_string
, from_tty
)
405 step_1 (0, 0, count_string
);
408 /* Likewise, but skip over subroutine calls as if single instructions. */
412 next_command (count_string
, from_tty
)
416 step_1 (1, 0, count_string
);
419 /* Likewise, but step only one instruction. */
423 stepi_command (count_string
, from_tty
)
427 step_1 (0, 1, count_string
);
432 nexti_command (count_string
, from_tty
)
436 step_1 (1, 1, count_string
);
440 step_1 (skip_subroutines
, single_inst
, count_string
)
441 int skip_subroutines
;
445 register int count
= 1;
446 struct frame_info
*frame
;
447 struct cleanup
*cleanups
= 0;
453 async_exec
= strip_bg_char (&count_string
);
455 /* If we get a request for running in the bg but the target
456 doesn't support it, error out. */
457 if (event_loop_p
&& async_exec
&& !target_can_async_p ())
458 error ("Asynchronous execution not supported on this target.");
460 /* If we don't get a request of running in the bg, then we need
461 to simulate synchronous (fg) execution. */
462 if (event_loop_p
&& !async_exec
&& target_can_async_p ())
464 /* Simulate synchronous execution */
465 async_disable_stdin ();
468 count
= count_string
? parse_and_eval_address (count_string
) : 1;
470 if (!single_inst
|| skip_subroutines
) /* leave si command alone */
472 enable_longjmp_breakpoint ();
473 cleanups
= make_cleanup ((make_cleanup_func
) disable_longjmp_breakpoint
,
477 for (; count
> 0; count
--)
479 clear_proceed_status ();
481 frame
= get_current_frame ();
482 if (!frame
) /* Avoid coredump here. Why tho? */
483 error ("No current frame");
484 step_frame_address
= FRAME_FP (frame
);
485 step_sp
= read_sp ();
489 find_pc_line_pc_range (stop_pc
, &step_range_start
, &step_range_end
);
490 if (step_range_end
== 0)
493 if (find_pc_partial_function (stop_pc
, &name
, &step_range_start
,
494 &step_range_end
) == 0)
495 error ("Cannot find bounds of current function");
497 target_terminal_ours ();
499 Single stepping until exit from function %s, \n\
500 which has no line number information.\n", name
);
505 /* Say we are stepping, but stop after one insn whatever it does. */
506 step_range_start
= step_range_end
= 1;
507 if (!skip_subroutines
)
509 Don't step over function calls, not even to functions lacking
514 if (skip_subroutines
)
517 step_multi
= (count
> 1);
518 proceed ((CORE_ADDR
) -1, TARGET_SIGNAL_DEFAULT
, 1);
522 /* FIXME: On nexti, this may have already been done (when we hit the
523 step resume break, I think). Probably this should be moved to
524 wait_for_inferior (near the top). */
525 #if defined (SHIFT_INST_REGS)
530 if (!single_inst
|| skip_subroutines
)
531 do_cleanups (cleanups
);
534 /* Continue program at specified address. */
537 jump_command (arg
, from_tty
)
541 register CORE_ADDR addr
;
542 struct symtabs_and_lines sals
;
543 struct symtab_and_line sal
;
550 /* Find out whether we must run in the background. */
552 async_exec
= strip_bg_char (&arg
);
554 /* If we must run in the background, but the target can't do it,
556 if (event_loop_p
&& async_exec
&& !target_can_async_p ())
557 error ("Asynchronous execution not supported on this target.");
559 /* If we are not asked to run in the bg, then prepare to run in the
560 foreground, synchronously. */
561 if (event_loop_p
&& !async_exec
&& target_can_async_p ())
563 /* Simulate synchronous execution */
564 async_disable_stdin ();
568 error_no_arg ("starting address");
570 sals
= decode_line_spec_1 (arg
, 1);
573 error ("Unreasonable jump request");
577 free ((PTR
) sals
.sals
);
579 if (sal
.symtab
== 0 && sal
.pc
== 0)
580 error ("No source file has been specified.");
582 resolve_sal_pc (&sal
); /* May error out */
584 /* See if we are trying to jump to another function. */
585 fn
= get_frame_function (get_current_frame ());
586 sfn
= find_pc_function (sal
.pc
);
587 if (fn
!= NULL
&& sfn
!= fn
)
589 if (!query ("Line %d is not in `%s'. Jump anyway? ", sal
.line
,
590 SYMBOL_SOURCE_NAME (fn
)))
592 error ("Not confirmed.");
599 fixup_symbol_section (sfn
, 0);
600 if (section_is_overlay (SYMBOL_BFD_SECTION (sfn
)) &&
601 !section_is_mapped (SYMBOL_BFD_SECTION (sfn
)))
603 if (!query ("WARNING!!! Destination is in unmapped overlay! Jump anyway? "))
605 error ("Not confirmed.");
615 printf_filtered ("Continuing at ");
616 print_address_numeric (addr
, 1, gdb_stdout
);
617 printf_filtered (".\n");
620 clear_proceed_status ();
621 proceed (addr
, TARGET_SIGNAL_0
, 0);
625 /* Go to line or address in current procedure */
627 go_command (line_no
, from_tty
)
631 if (line_no
== (char *) NULL
|| !*line_no
)
632 printf_filtered (GO_USAGE
);
635 tbreak_command (line_no
, from_tty
);
636 jump_command (line_no
, from_tty
);
641 /* Continue program giving it specified signal. */
644 signal_command (signum_exp
, from_tty
)
648 enum target_signal oursig
;
650 dont_repeat (); /* Too dangerous. */
654 error_no_arg ("signal number");
656 /* It would be even slicker to make signal names be valid expressions,
657 (the type could be "enum $signal" or some such), then the user could
658 assign them to convenience variables. */
659 oursig
= target_signal_from_name (signum_exp
);
661 if (oursig
== TARGET_SIGNAL_UNKNOWN
)
663 /* No, try numeric. */
664 int num
= parse_and_eval_address (signum_exp
);
667 oursig
= TARGET_SIGNAL_0
;
669 oursig
= target_signal_from_command (num
);
674 if (oursig
== TARGET_SIGNAL_0
)
675 printf_filtered ("Continuing with no signal.\n");
677 printf_filtered ("Continuing with signal %s.\n",
678 target_signal_to_name (oursig
));
681 clear_proceed_status ();
682 /* "signal 0" should not get stuck if we are stopped at a breakpoint.
683 FIXME: Neither should "signal foo" but when I tried passing
684 (CORE_ADDR)-1 unconditionally I got a testsuite failure which I haven't
685 tried to track down yet. */
686 proceed (oursig
== TARGET_SIGNAL_0
? (CORE_ADDR
) -1 : stop_pc
, oursig
, 0);
689 /* Call breakpoint_auto_delete on the current contents of the bpstat
690 pointed to by arg (which is really a bpstat *). */
693 breakpoint_auto_delete_contents (arg
)
696 breakpoint_auto_delete (*(bpstat
*) arg
);
700 /* Execute a "stack dummy", a piece of code stored in the stack
701 by the debugger to be executed in the inferior.
703 To call: first, do PUSH_DUMMY_FRAME.
704 Then push the contents of the dummy. It should end with a breakpoint insn.
705 Then call here, passing address at which to start the dummy.
707 The contents of all registers are saved before the dummy frame is popped
708 and copied into the buffer BUFFER.
710 The dummy's frame is automatically popped whenever that break is hit.
711 If that is the first time the program stops, run_stack_dummy
712 returns to its caller with that frame already gone and returns 0.
713 Otherwise, run_stack-dummy returns 1 (the frame will eventually be popped
714 when we do hit that breakpoint). */
717 run_stack_dummy (addr
, buffer
)
721 struct cleanup
*old_cleanups
= make_cleanup (null_cleanup
, 0);
723 /* Now proceed, having reached the desired place. */
724 clear_proceed_status ();
726 if (CALL_DUMMY_BREAKPOINT_OFFSET_P
)
728 struct breakpoint
*bpt
;
729 struct symtab_and_line sal
;
731 INIT_SAL (&sal
); /* initialize to zeroes */
732 if (CALL_DUMMY_LOCATION
== AT_ENTRY_POINT
)
734 sal
.pc
= CALL_DUMMY_ADDRESS ();
738 sal
.pc
= addr
- CALL_DUMMY_START_OFFSET
+ CALL_DUMMY_BREAKPOINT_OFFSET
;
740 sal
.section
= find_pc_overlay (sal
.pc
);
742 /* Set up a FRAME for the dummy frame so we can pass it to
743 set_momentary_breakpoint. We need to give the breakpoint a
744 frame in case there is only one copy of the dummy (e.g.
745 CALL_DUMMY_LOCATION == AFTER_TEXT_END). */
746 flush_cached_frames ();
747 set_current_frame (create_new_frame (read_fp (), sal
.pc
));
749 /* If defined, CALL_DUMMY_BREAKPOINT_OFFSET is where we need to put
750 a breakpoint instruction. If not, the call dummy already has the
751 breakpoint instruction in it.
753 addr is the address of the call dummy plus the CALL_DUMMY_START_OFFSET,
754 so we need to subtract the CALL_DUMMY_START_OFFSET. */
755 bpt
= set_momentary_breakpoint (sal
,
756 get_current_frame (),
758 bpt
->disposition
= del
;
760 /* If all error()s out of proceed ended up calling normal_stop (and
761 perhaps they should; it already does in the special case of error
762 out of resume()), then we wouldn't need this. */
763 make_cleanup (breakpoint_auto_delete_contents
, &stop_bpstat
);
766 disable_watchpoints_before_interactive_call_start ();
767 proceed_to_finish
= 1; /* We want stop_registers, please... */
768 proceed (addr
, TARGET_SIGNAL_0
, 0);
769 enable_watchpoints_after_interactive_call_stop ();
771 discard_cleanups (old_cleanups
);
773 if (!stop_stack_dummy
)
776 /* On return, the stack dummy has been popped already. */
778 memcpy (buffer
, stop_registers
, REGISTER_BYTES
);
782 /* Proceed until we reach a different source line with pc greater than
783 our current one or exit the function. We skip calls in both cases.
785 Note that eventually this command should probably be changed so
786 that only source lines are printed out when we hit the breakpoint
787 we set. This may involve changes to wait_for_inferior and the
788 proceed status code. */
792 until_next_command (from_tty
)
795 struct frame_info
*frame
;
798 struct symtab_and_line sal
;
800 clear_proceed_status ();
802 frame
= get_current_frame ();
804 /* Step until either exited from this function or greater
805 than the current line (if in symbolic section) or pc (if
809 func
= find_pc_function (pc
);
813 struct minimal_symbol
*msymbol
= lookup_minimal_symbol_by_pc (pc
);
816 error ("Execution is not within a known function.");
818 step_range_start
= SYMBOL_VALUE_ADDRESS (msymbol
);
823 sal
= find_pc_line (pc
, 0);
825 step_range_start
= BLOCK_START (SYMBOL_BLOCK_VALUE (func
));
826 step_range_end
= sal
.end
;
830 step_frame_address
= FRAME_FP (frame
);
831 step_sp
= read_sp ();
833 step_multi
= 0; /* Only one call to proceed */
835 proceed ((CORE_ADDR
) -1, TARGET_SIGNAL_DEFAULT
, 1);
839 until_command (arg
, from_tty
)
845 if (!target_has_execution
)
846 error ("The program is not running.");
848 /* Find out whether we must run in the background. */
850 async_exec
= strip_bg_char (&arg
);
852 /* If we must run in the background, but the target can't do it,
854 if (event_loop_p
&& async_exec
&& !target_can_async_p ())
855 error ("Asynchronous execution not supported on this target.");
857 /* If we are not asked to run in the bg, then prepare to run in the
858 foreground, synchronously. */
859 if (event_loop_p
&& !async_exec
&& target_can_async_p ())
861 /* Simulate synchronous execution */
862 async_disable_stdin ();
866 until_break_command (arg
, from_tty
);
868 until_next_command (from_tty
);
872 /* Stuff that needs to be done by the finish command after the target
873 has stopped. In asynchronous mode, we wait for the target to stop in
874 the call to poll or select in the event loop, so it is impossible to
875 do all the stuff as part of the finish_command function itself. The
876 only chance we have to complete this command is in
877 fetch_inferior_event, which is called by the event loop as soon as it
878 detects that the target has stopped. This function is called via the
879 cmd_continaution pointer. */
881 finish_command_continuation (arg
)
882 struct continuation_arg
*arg
;
884 register struct symbol
*function
;
885 struct breakpoint
*breakpoint
;
887 breakpoint
= (struct breakpoint
*) arg
->data
;
888 function
= (struct symbol
*) (arg
->next
)->data
;
890 if (bpstat_find_breakpoint (stop_bpstat
, breakpoint
) != NULL
893 struct type
*value_type
;
894 register value_ptr val
;
898 value_type
= TYPE_TARGET_TYPE (SYMBOL_TYPE (function
));
900 internal_error ("finish_command: function has no target type");
902 if (TYPE_CODE (value_type
) == TYPE_CODE_VOID
)
904 do_exec_cleanups (ALL_CLEANUPS
);
908 funcaddr
= BLOCK_START (SYMBOL_BLOCK_VALUE (function
));
910 struct_return
= using_struct_return (value_of_variable (function
, NULL
),
913 check_typedef (value_type
),
914 BLOCK_GCC_COMPILED (SYMBOL_BLOCK_VALUE (function
)));
918 val
= value_being_returned (value_type
, stop_registers
, struct_return
);
919 printf_filtered ("Value returned is $%d = ", record_latest_value (val
));
920 value_print (val
, gdb_stdout
, 0, Val_no_prettyprint
);
921 printf_filtered ("\n");
925 /* We cannot determine the contents of the structure because
926 it is on the stack, and we don't know where, since we did not
927 initiate the call, as opposed to the call_function_by_hand case */
928 #ifdef VALUE_RETURNED_FROM_STACK
930 printf_filtered ("Value returned has type: %s.",
931 TYPE_NAME (value_type
));
932 printf_filtered (" Cannot determine contents\n");
934 val
= value_being_returned (value_type
, stop_registers
,
936 printf_filtered ("Value returned is $%d = ",
937 record_latest_value (val
));
938 value_print (val
, gdb_stdout
, 0, Val_no_prettyprint
);
939 printf_filtered ("\n");
944 do_exec_cleanups (ALL_CLEANUPS
);
947 /* "finish": Set a temporary breakpoint at the place
948 the selected frame will return to, then continue. */
951 finish_command (arg
, from_tty
)
955 struct symtab_and_line sal
;
956 register struct frame_info
*frame
;
957 register struct symbol
*function
;
958 struct breakpoint
*breakpoint
;
959 struct cleanup
*old_chain
;
960 struct continuation_arg
*arg1
, *arg2
;
964 /* Find out whether we must run in the background. */
966 async_exec
= strip_bg_char (&arg
);
968 /* If we must run in the background, but the target can't do it,
970 if (event_loop_p
&& async_exec
&& !target_can_async_p ())
971 error ("Asynchronous execution not supported on this target.");
973 /* If we are not asked to run in the bg, then prepare to run in the
974 foreground, synchronously. */
975 if (event_loop_p
&& !async_exec
&& target_can_async_p ())
977 /* Simulate synchronous execution */
978 async_disable_stdin ();
982 error ("The \"finish\" command does not take any arguments.");
983 if (!target_has_execution
)
984 error ("The program is not running.");
985 if (selected_frame
== NULL
)
986 error ("No selected frame.");
988 frame
= get_prev_frame (selected_frame
);
990 error ("\"finish\" not meaningful in the outermost frame.");
992 clear_proceed_status ();
994 sal
= find_pc_line (frame
->pc
, 0);
997 breakpoint
= set_momentary_breakpoint (sal
, frame
, bp_finish
);
999 if (!event_loop_p
|| !target_can_async_p ())
1000 old_chain
= make_cleanup ((make_cleanup_func
) delete_breakpoint
, breakpoint
);
1002 make_exec_cleanup ((make_cleanup_func
) delete_breakpoint
, breakpoint
);
1004 /* Find the function we will return from. */
1006 function
= find_pc_function (selected_frame
->pc
);
1008 /* Print info on the selected frame, including level number
1012 printf_filtered ("Run till exit from ");
1013 print_stack_frame (selected_frame
, selected_frame_level
, 0);
1016 /* If running asynchronously and the target support asynchronous
1017 execution, set things up for the rest of the finish command to be
1018 completed later on, when gdb has detected that the target has
1019 stopped, in fetch_inferior_event. */
1020 if (event_loop_p
&& target_can_async_p ())
1023 (struct continuation_arg
*) xmalloc (sizeof (struct continuation_arg
));
1025 (struct continuation_arg
*) xmalloc (sizeof (struct continuation_arg
));
1028 arg1
->data
= (PTR
) breakpoint
;
1029 arg2
->data
= (PTR
) function
;
1030 add_continuation (finish_command_continuation
, arg1
);
1033 proceed_to_finish
= 1; /* We want stop_registers, please... */
1034 proceed ((CORE_ADDR
) -1, TARGET_SIGNAL_DEFAULT
, 0);
1036 /* Do this only if not running asynchronously or if the target
1037 cannot do async execution. Otherwise, complete this command when
1038 the target actually stops, in fetch_inferior_event. */
1039 if (!event_loop_p
|| !target_can_async_p ())
1042 /* Did we stop at our breakpoint? */
1043 if (bpstat_find_breakpoint (stop_bpstat
, breakpoint
) != NULL
1046 struct type
*value_type
;
1047 register value_ptr val
;
1051 value_type
= TYPE_TARGET_TYPE (SYMBOL_TYPE (function
));
1053 internal_error ("finish_command: function has no target type");
1055 /* FIXME: Shouldn't we do the cleanups before returning? */
1056 if (TYPE_CODE (value_type
) == TYPE_CODE_VOID
)
1059 funcaddr
= BLOCK_START (SYMBOL_BLOCK_VALUE (function
));
1062 using_struct_return (value_of_variable (function
, NULL
),
1064 check_typedef (value_type
),
1065 BLOCK_GCC_COMPILED (SYMBOL_BLOCK_VALUE (function
)));
1070 value_being_returned (value_type
, stop_registers
, struct_return
);
1071 printf_filtered ("Value returned is $%d = ",
1072 record_latest_value (val
));
1073 value_print (val
, gdb_stdout
, 0, Val_no_prettyprint
);
1074 printf_filtered ("\n");
1078 /* We cannot determine the contents of the structure
1079 because it is on the stack, and we don't know
1080 where, since we did not initiate the call, as
1081 opposed to the call_function_by_hand case */
1082 #ifdef VALUE_RETURNED_FROM_STACK
1084 printf_filtered ("Value returned has type: %s.",
1085 TYPE_NAME (value_type
));
1086 printf_filtered (" Cannot determine contents\n");
1088 val
= value_being_returned (value_type
, stop_registers
,
1090 printf_filtered ("Value returned is $%d = ",
1091 record_latest_value (val
));
1092 value_print (val
, gdb_stdout
, 0, Val_no_prettyprint
);
1093 printf_filtered ("\n");
1097 do_cleanups (old_chain
);
1103 program_info (args
, from_tty
)
1107 bpstat bs
= stop_bpstat
;
1108 int num
= bpstat_num (&bs
);
1110 if (!target_has_execution
)
1112 printf_filtered ("The program being debugged is not being run.\n");
1116 target_files_info ();
1117 printf_filtered ("Program stopped at %s.\n",
1118 local_hex_string ((unsigned long) stop_pc
));
1120 printf_filtered ("It stopped after being stepped.\n");
1123 /* There may be several breakpoints in the same place, so this
1124 isn't as strange as it seems. */
1129 printf_filtered ("It stopped at a breakpoint that has ");
1130 printf_filtered ("since been deleted.\n");
1133 printf_filtered ("It stopped at breakpoint %d.\n", num
);
1134 num
= bpstat_num (&bs
);
1137 else if (stop_signal
!= TARGET_SIGNAL_0
)
1139 printf_filtered ("It stopped with signal %s, %s.\n",
1140 target_signal_to_name (stop_signal
),
1141 target_signal_to_string (stop_signal
));
1146 printf_filtered ("Type \"info stack\" or \"info registers\" ");
1147 printf_filtered ("for more information.\n");
1152 environment_info (var
, from_tty
)
1158 register char *val
= get_in_environ (inferior_environ
, var
);
1161 puts_filtered (var
);
1162 puts_filtered (" = ");
1163 puts_filtered (val
);
1164 puts_filtered ("\n");
1168 puts_filtered ("Environment variable \"");
1169 puts_filtered (var
);
1170 puts_filtered ("\" not defined.\n");
1175 register char **vector
= environ_vector (inferior_environ
);
1178 puts_filtered (*vector
++);
1179 puts_filtered ("\n");
1185 set_environment_command (arg
, from_tty
)
1189 register char *p
, *val
, *var
;
1193 error_no_arg ("environment variable and value");
1195 /* Find seperation between variable name and value */
1196 p
= (char *) strchr (arg
, '=');
1197 val
= (char *) strchr (arg
, ' ');
1199 if (p
!= 0 && val
!= 0)
1201 /* We have both a space and an equals. If the space is before the
1202 equals, walk forward over the spaces til we see a nonspace
1203 (possibly the equals). */
1208 /* Now if the = is after the char following the spaces,
1209 take the char following the spaces. */
1213 else if (val
!= 0 && p
== 0)
1217 error_no_arg ("environment variable to set");
1219 if (p
== 0 || p
[1] == 0)
1223 p
= arg
+ strlen (arg
); /* So that savestring below will work */
1227 /* Not setting variable value to null */
1229 while (*val
== ' ' || *val
== '\t')
1233 while (p
!= arg
&& (p
[-1] == ' ' || p
[-1] == '\t'))
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. */
1339 if (TYPE_CODE (REGISTER_VIRTUAL_TYPE (i
)) == TYPE_CODE_FLT
&& !fpregs
)
1348 /* If the register name is empty, it is undefined for this
1349 processor, so don't display anything. */
1350 if (REGISTER_NAME (i
) == NULL
|| *(REGISTER_NAME (i
)) == '\0')
1353 fputs_filtered (REGISTER_NAME (i
), gdb_stdout
);
1354 print_spaces_filtered (15 - strlen (REGISTER_NAME (i
)), gdb_stdout
);
1356 /* Get the data in raw format. */
1357 if (read_relative_register_raw_bytes (i
, raw_buffer
))
1359 printf_filtered ("*value not available*\n");
1363 /* Convert raw data to virtual format if necessary. */
1364 if (REGISTER_CONVERTIBLE (i
))
1366 REGISTER_CONVERT_TO_VIRTUAL (i
, REGISTER_VIRTUAL_TYPE (i
),
1367 raw_buffer
, virtual_buffer
);
1371 memcpy (virtual_buffer
, raw_buffer
,
1372 REGISTER_VIRTUAL_SIZE (i
));
1375 /* If virtual format is floating, print it that way, and in raw hex. */
1376 if (TYPE_CODE (REGISTER_VIRTUAL_TYPE (i
)) == TYPE_CODE_FLT
)
1380 #ifdef INVALID_FLOAT
1381 if (INVALID_FLOAT (virtual_buffer
, REGISTER_VIRTUAL_SIZE (i
)))
1382 printf_filtered ("<invalid float>");
1385 val_print (REGISTER_VIRTUAL_TYPE (i
), virtual_buffer
, 0, 0,
1386 gdb_stdout
, 0, 1, 0, Val_pretty_default
);
1388 printf_filtered ("\t(raw 0x");
1389 for (j
= 0; j
< REGISTER_RAW_SIZE (i
); j
++)
1391 register int idx
= TARGET_BYTE_ORDER
== BIG_ENDIAN
? j
1392 : REGISTER_RAW_SIZE (i
) - 1 - j
;
1393 printf_filtered ("%02x", (unsigned char) raw_buffer
[idx
]);
1395 printf_filtered (")");
1398 /* FIXME! val_print probably can handle all of these cases now... */
1400 /* Else if virtual format is too long for printf,
1401 print in hex a byte at a time. */
1402 else if (REGISTER_VIRTUAL_SIZE (i
) > (int) sizeof (long))
1405 printf_filtered ("0x");
1406 for (j
= 0; j
< REGISTER_VIRTUAL_SIZE (i
); j
++)
1407 printf_filtered ("%02x", (unsigned char) virtual_buffer
[j
]);
1409 /* Else print as integer in hex and in decimal. */
1412 val_print (REGISTER_VIRTUAL_TYPE (i
), virtual_buffer
, 0, 0,
1413 gdb_stdout
, 'x', 1, 0, Val_pretty_default
);
1414 printf_filtered ("\t");
1415 val_print (REGISTER_VIRTUAL_TYPE (i
), virtual_buffer
, 0, 0,
1416 gdb_stdout
, 0, 1, 0, Val_pretty_default
);
1419 /* The SPARC wants to print even-numbered float regs as doubles
1420 in addition to printing them as floats. */
1421 #ifdef PRINT_REGISTER_HOOK
1422 PRINT_REGISTER_HOOK (i
);
1425 printf_filtered ("\n");
1428 #endif /* no DO_REGISTERS_INFO. */
1431 registers_info (addr_exp
, fpregs
)
1435 int regnum
, numregs
;
1438 if (!target_has_registers
)
1439 error ("The program has no registers now.");
1440 if (selected_frame
== NULL
)
1441 error ("No selected frame.");
1445 DO_REGISTERS_INFO (-1, fpregs
);
1451 if (addr_exp
[0] == '$')
1454 while (*end
!= '\0' && *end
!= ' ' && *end
!= '\t')
1456 numregs
= ARCH_NUM_REGS
;
1458 regnum
= target_map_name_to_register (addr_exp
, end
- addr_exp
);
1464 if (*addr_exp
>= '0' && *addr_exp
<= '9')
1465 regnum
= atoi (addr_exp
); /* Take a number */
1466 if (regnum
>= numregs
) /* Bad name, or bad number */
1467 error ("%.*s: invalid register", end
- addr_exp
, addr_exp
);
1470 DO_REGISTERS_INFO (regnum
, fpregs
);
1473 while (*addr_exp
== ' ' || *addr_exp
== '\t')
1476 while (*addr_exp
!= '\0');
1480 all_registers_info (addr_exp
, from_tty
)
1484 registers_info (addr_exp
, 1);
1488 nofp_registers_info (addr_exp
, from_tty
)
1492 registers_info (addr_exp
, 0);
1498 * Should save/restore the tty state since it might be that the
1499 * program to be debugged was started on this tty and it wants
1500 * the tty in some state other than what we want. If it's running
1501 * on another terminal or without a terminal, then saving and
1502 * restoring the tty state is a harmless no-op.
1503 * This only needs to be done if we are attaching to a process.
1508 takes a program started up outside of gdb and ``attaches'' to it.
1509 This stops it cold in its tracks and allows us to start debugging it.
1510 and wait for the trace-trap that results from attaching. */
1513 attach_command (args
, from_tty
)
1518 extern int auto_solib_add
;
1522 char *full_exec_path
= NULL
;
1524 dont_repeat (); /* Not for the faint of heart */
1526 if (target_has_execution
)
1528 if (query ("A program is being debugged already. Kill it? "))
1531 error ("Not killed.");
1534 target_attach (args
, from_tty
);
1536 /* Set up the "saved terminal modes" of the inferior
1537 based on what modes we are starting it with. */
1538 target_terminal_init ();
1540 /* Install inferior's terminal modes. */
1541 target_terminal_inferior ();
1543 /* Set up execution context to know that we should return from
1544 wait_for_inferior as soon as the target reports a stop. */
1545 init_wait_for_inferior ();
1546 clear_proceed_status ();
1547 stop_soon_quietly
= 1;
1549 /* No traps are generated when attaching to inferior under Mach 3
1551 #ifndef ATTACH_NO_WAIT
1552 wait_for_inferior ();
1556 * If no exec file is yet known, try to determine it from the
1559 exec_file
= (char *) get_exec_file (0);
1562 exec_file
= target_pid_to_exec_file (inferior_pid
);
1565 /* It's possible we don't have a full path, but rather just a
1566 filename. Some targets, such as HP-UX, don't provide the
1569 Attempt to qualify the filename against the source path.
1570 (If that fails, we'll just fall back on the original
1571 filename. Not much more we can do...)
1573 if (!source_full_path_of (exec_file
, &full_exec_path
))
1574 full_exec_path
= savestring (exec_file
, strlen (exec_file
));
1576 exec_file_attach (full_exec_path
, from_tty
);
1577 symbol_file_command (full_exec_path
, from_tty
);
1584 /* Add shared library symbols from the newly attached process, if any. */
1585 SOLIB_ADD ((char *) 0, from_tty
, ¤t_target
);
1586 re_enable_breakpoints_in_shlibs ();
1590 /* Take any necessary post-attaching actions for this platform.
1592 target_post_attach (inferior_pid
);
1602 * takes a program previously attached to and detaches it.
1603 * The program resumes execution and will no longer stop
1604 * on signals, etc. We better not have left any breakpoints
1605 * in the program or it'll die when it hits one. For this
1606 * to work, it may be necessary for the process to have been
1607 * previously attached. It *might* work if the program was
1608 * started via the normal ptrace (PTRACE_TRACEME).
1612 detach_command (args
, from_tty
)
1616 dont_repeat (); /* Not for the faint of heart */
1617 target_detach (args
, from_tty
);
1618 #if defined(SOLIB_RESTART)
1625 /* Stop the execution of the target while running in async mode, in
1628 interrupt_target_command (args
, from_tty
)
1632 if (event_loop_p
&& target_can_async_p ())
1634 dont_repeat (); /* Not for the faint of heart */
1641 float_info (addr_exp
, from_tty
)
1648 printf_filtered ("No floating point info available for this processor.\n");
1654 unset_command (args
, from_tty
)
1658 printf_filtered ("\"unset\" must be followed by the name of ");
1659 printf_filtered ("an unset subcommand.\n");
1660 help_list (unsetlist
, "unset ", -1, gdb_stdout
);
1664 _initialize_infcmd ()
1666 struct cmd_list_element
*c
;
1668 add_com ("tty", class_run
, tty_command
,
1669 "Set terminal for future runs of program being debugged.");
1672 (add_set_cmd ("args", class_run
, var_string_noescape
,
1673 (char *) &inferior_args
,
1674 "Set argument list to give program being debugged when it is started.\n\
1675 Follow this command with any number of args, to be passed to the program.",
1680 ("environment", no_class
, environment_info
,
1681 "The environment to give the program, or one variable's value.\n\
1682 With an argument VAR, prints the value of environment variable VAR to\n\
1683 give the program being debugged. With no arguments, prints the entire\n\
1684 environment to be given to the program.", &showlist
);
1685 c
->completer
= noop_completer
;
1687 add_prefix_cmd ("unset", no_class
, unset_command
,
1688 "Complement to certain \"set\" commands",
1689 &unsetlist
, "unset ", 0, &cmdlist
);
1691 c
= add_cmd ("environment", class_run
, unset_environment_command
,
1692 "Cancel environment variable VAR for the program.\n\
1693 This does not affect the program until the next \"run\" command.",
1695 c
->completer
= noop_completer
;
1697 c
= add_cmd ("environment", class_run
, set_environment_command
,
1698 "Set environment variable value to give the program.\n\
1699 Arguments are VAR VALUE where VAR is variable name and VALUE is value.\n\
1700 VALUES of environment variables are uninterpreted strings.\n\
1701 This does not affect the program until the next \"run\" command.",
1703 c
->completer
= noop_completer
;
1705 add_com ("path", class_files
, path_command
,
1706 "Add directory DIR(s) to beginning of search path for object files.\n\
1707 $cwd in the path means the current working directory.\n\
1708 This path is equivalent to the $PATH shell variable. It is a list of\n\
1709 directories, separated by colons. These directories are searched to find\n\
1710 fully linked executable files and separately compiled object files as needed.");
1712 c
= add_cmd ("paths", no_class
, path_info
,
1713 "Current search path for finding object files.\n\
1714 $cwd in the path means the current working directory.\n\
1715 This path is equivalent to the $PATH shell variable. It is a list of\n\
1716 directories, separated by colons. These directories are searched to find\n\
1717 fully linked executable files and separately compiled object files as needed.",
1719 c
->completer
= noop_completer
;
1721 add_com ("attach", class_run
, attach_command
,
1722 "Attach to a process or file outside of GDB.\n\
1723 This command attaches to another target, of the same type as your last\n\
1724 \"target\" command (\"info files\" will show your target stack).\n\
1725 The command may take as argument a process id or a device file.\n\
1726 For a process id, you must have permission to send the process a signal,\n\
1727 and it must have the same effective uid as the debugger.\n\
1728 When using \"attach\" with a process id, the debugger finds the\n\
1729 program running in the process, looking first in the current working\n\
1730 directory, or (if not found there) using the source file search path\n\
1731 (see the \"directory\" command). You can also use the \"file\" command\n\
1732 to specify the program, and to load its symbol table.");
1734 add_com ("detach", class_run
, detach_command
,
1735 "Detach a process or file previously attached.\n\
1736 If a process, it is no longer traced, and it continues its execution. If\n\
1737 you were debugging a file, the file is closed and gdb no longer accesses it.");
1739 add_com ("signal", class_run
, signal_command
,
1740 "Continue program giving it signal specified by the argument.\n\
1741 An argument of \"0\" means continue program without giving it a signal.");
1743 add_com ("stepi", class_run
, stepi_command
,
1744 "Step one instruction exactly.\n\
1745 Argument N means do this N times (or till program stops for another reason).");
1746 add_com_alias ("si", "stepi", class_alias
, 0);
1748 add_com ("nexti", class_run
, nexti_command
,
1749 "Step one instruction, but proceed through subroutine calls.\n\
1750 Argument N means do this N times (or till program stops for another reason).");
1751 add_com_alias ("ni", "nexti", class_alias
, 0);
1753 add_com ("finish", class_run
, finish_command
,
1754 "Execute until selected stack frame returns.\n\
1755 Upon return, the value returned is printed and put in the value history.");
1757 add_com ("next", class_run
, next_command
,
1758 "Step program, proceeding through subroutine calls.\n\
1759 Like the \"step\" command as long as subroutine calls do not happen;\n\
1760 when they do, the call is treated as one instruction.\n\
1761 Argument N means do this N times (or till program stops for another reason).");
1762 add_com_alias ("n", "next", class_run
, 1);
1764 add_com_alias ("S", "next", class_run
, 1);
1766 add_com ("step", class_run
, step_command
,
1767 "Step program until it reaches a different source line.\n\
1768 Argument N means do this N times (or till program stops for another reason).");
1769 add_com_alias ("s", "step", class_run
, 1);
1771 add_com ("until", class_run
, until_command
,
1772 "Execute until the program reaches a source line greater than the current\n\
1773 or a specified line or address or function (same args as break command).\n\
1774 Execution will also stop upon exit from the current stack frame.");
1775 add_com_alias ("u", "until", class_run
, 1);
1777 add_com ("jump", class_run
, jump_command
,
1778 "Continue program being debugged at specified line or address.\n\
1779 Give as argument either LINENUM or *ADDR, where ADDR is an expression\n\
1780 for an address to start at.");
1783 add_com ("go", class_run
, go_command
,
1784 "Usage: go <location>\n\
1785 Continue program being debugged, stopping at specified line or \n\
1787 Give as argument either LINENUM or *ADDR, where ADDR is an \n\
1788 expression for an address to start at.\n\
1789 This command is a combination of tbreak and jump.");
1792 add_com_alias ("g", "go", class_run
, 1);
1794 add_com ("continue", class_run
, continue_command
,
1795 "Continue program being debugged, after signal or breakpoint.\n\
1796 If proceeding from breakpoint, a number N may be used as an argument,\n\
1797 which means to set the ignore count of that breakpoint to N - 1 (so that\n\
1798 the breakpoint won't break until the Nth time it is reached).");
1799 add_com_alias ("c", "cont", class_run
, 1);
1800 add_com_alias ("fg", "cont", class_run
, 1);
1802 add_com ("run", class_run
, run_command
,
1803 "Start debugged program. You may specify arguments to give it.\n\
1804 Args may include \"*\", or \"[...]\"; they are expanded using \"sh\".\n\
1805 Input and output redirection with \">\", \"<\", or \">>\" are also allowed.\n\n\
1806 With no arguments, uses arguments last specified (with \"run\" or \"set args\").\n\
1807 To cancel previous arguments and run with no arguments,\n\
1808 use \"set args\" without arguments.");
1809 add_com_alias ("r", "run", class_run
, 1);
1811 add_com ("R", class_run
, run_no_args_command
,
1812 "Start debugged program with no arguments.");
1814 add_com ("interrupt", class_run
, interrupt_target_command
,
1815 "Interrupt the execution of the debugged program.");
1817 add_info ("registers", nofp_registers_info
,
1818 "List of integer registers and their contents, for selected stack frame.\n\
1819 Register name as argument means describe only that register.");
1822 add_com ("lr", class_info
, nofp_registers_info
,
1823 "List of integer registers and their contents, for selected stack frame.\n\
1824 Register name as argument means describe only that register.");
1825 add_info ("all-registers", all_registers_info
,
1826 "List of all registers and their contents, for selected stack frame.\n\
1827 Register name as argument means describe only that register.");
1829 add_info ("program", program_info
,
1830 "Execution status of the program.");
1832 add_info ("float", float_info
,
1833 "Print the status of the floating point unit\n");
1835 inferior_args
= savestring ("", 1); /* Initially no args */
1836 inferior_environ
= make_environ ();
1837 init_environ (inferior_environ
);