1 /* Print and select stack frames for GDB, the GNU debugger.
3 Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994,
4 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003 Free Software
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 59 Temple Place - Suite 330,
22 Boston, MA 02111-1307, USA. */
26 #include "gdb_string.h"
30 #include "expression.h"
37 #include "breakpoint.h"
44 #include "gdb_assert.h"
46 /* Prototypes for exported functions. */
48 void args_info (char *, int);
50 void locals_info (char *, int);
52 void (*selected_frame_level_changed_hook
) (int);
54 void _initialize_stack (void);
56 void return_command (char *, int);
58 /* Prototypes for local functions. */
60 static void down_command (char *, int);
62 static void down_silently_base (char *);
64 static void down_silently_command (char *, int);
66 static void up_command (char *, int);
68 static void up_silently_base (char *);
70 static void up_silently_command (char *, int);
72 void frame_command (char *, int);
74 static void current_frame_command (char *, int);
76 static void print_frame_arg_vars (struct frame_info
*, struct ui_file
*);
78 static void catch_info (char *, int);
80 static void args_plus_locals_info (char *, int);
82 static void print_frame_label_vars (struct frame_info
*, int,
85 static void print_frame_local_vars (struct frame_info
*, int,
88 static int print_block_frame_labels (struct block
*, int *,
91 static int print_block_frame_locals (struct block
*,
96 static void print_frame (struct frame_info
*fi
,
100 struct symtab_and_line sal
);
102 static void backtrace_command (char *, int);
104 struct frame_info
*parse_frame_specification (char *);
106 static void frame_info (char *, int);
108 extern int addressprint
; /* Print addresses, or stay symbolic only? */
110 /* Zero means do things normally; we are interacting directly with the
111 user. One means print the full filename and linenumber when a
112 frame is printed, and do so in a format emacs18/emacs19.22 can
113 parse. Two means print similar annotations, but in many more
114 cases and in a slightly different syntax. */
116 int annotation_level
= 0;
119 struct print_stack_frame_args
121 struct frame_info
*fi
;
127 /* Show or print the frame arguments.
128 Pass the args the way catch_errors wants them. */
129 static int print_stack_frame_stub (void *args
);
131 print_stack_frame_stub (void *args
)
133 struct print_stack_frame_args
*p
= (struct print_stack_frame_args
*) args
;
135 print_frame_info (p
->fi
, p
->level
, p
->source
, p
->args
);
139 /* Show or print a stack frame briefly. FRAME_INFI should be the frame info
140 and LEVEL should be its level in the stack (or -1 for level not defined).
141 This prints the level, the function executing, the arguments,
142 and the file name and line number.
143 If the pc is not at the beginning of the source line,
144 the actual pc is printed at the beginning.
146 If SOURCE is 1, print the source line as well.
147 If SOURCE is -1, print ONLY the source line. */
150 print_stack_frame (struct frame_info
*fi
, int level
, int source
)
152 struct print_stack_frame_args args
;
156 args
.source
= source
;
159 catch_errors (print_stack_frame_stub
, (char *) &args
, "", RETURN_MASK_ALL
);
162 struct print_args_args
165 struct frame_info
*fi
;
166 struct ui_file
*stream
;
169 static int print_args_stub (void *);
171 /* Print nameless args on STREAM.
172 FI is the frameinfo for this frame, START is the offset
173 of the first nameless arg, and NUM is the number of nameless args to
174 print. FIRST is nonzero if this is the first argument (not just
175 the first nameless arg). */
178 print_frame_nameless_args (struct frame_info
*fi
, long start
, int num
,
179 int first
, struct ui_file
*stream
)
185 for (i
= 0; i
< num
; i
++)
188 argsaddr
= get_frame_args_address (fi
);
191 arg_value
= read_memory_integer (argsaddr
+ start
, sizeof (int));
193 fprintf_filtered (stream
, ", ");
194 fprintf_filtered (stream
, "%ld", arg_value
);
196 start
+= sizeof (int);
200 /* Print the arguments of a stack frame, given the function FUNC
201 running in that frame (as a symbol), the info on the frame,
202 and the number of args according to the stack frame (or -1 if unknown). */
204 /* References here and elsewhere to "number of args according to the
205 stack frame" appear in all cases to refer to "number of ints of args
206 according to the stack frame". At least for VAX, i386, isi. */
209 print_frame_args (struct symbol
*func
, struct frame_info
*fi
, int num
,
210 struct ui_file
*stream
)
212 struct block
*b
= NULL
;
215 register struct symbol
*sym
;
217 /* Offset of next stack argument beyond the one we have seen that is
218 at the highest offset.
219 -1 if we haven't come to a stack argument yet. */
220 long highest_offset
= -1;
222 /* Number of ints of arguments that we have printed so far. */
223 int args_printed
= 0;
224 struct cleanup
*old_chain
, *list_chain
;
225 struct ui_stream
*stb
;
227 stb
= ui_out_stream_new (uiout
);
228 old_chain
= make_cleanup_ui_out_stream_delete (stb
);
232 b
= SYMBOL_BLOCK_VALUE (func
);
233 /* Function blocks are order sensitive, and thus should not be
235 gdb_assert (BLOCK_HASHTABLE (b
) == 0);
237 ALL_BLOCK_SYMBOLS (b
, i
, sym
)
241 /* Keep track of the highest stack argument offset seen, and
242 skip over any kinds of symbols we don't care about. */
244 switch (SYMBOL_CLASS (sym
))
249 long current_offset
= SYMBOL_VALUE (sym
);
250 arg_size
= TYPE_LENGTH (SYMBOL_TYPE (sym
));
252 /* Compute address of next argument by adding the size of
253 this argument and rounding to an int boundary. */
255 ((current_offset
+ arg_size
+ sizeof (int) - 1)
256 & ~(sizeof (int) - 1));
258 /* If this is the highest offset seen yet, set highest_offset. */
259 if (highest_offset
== -1
260 || (current_offset
> highest_offset
))
261 highest_offset
= current_offset
;
263 /* Add the number of ints we're about to print to args_printed. */
264 args_printed
+= (arg_size
+ sizeof (int) - 1) / sizeof (int);
267 /* We care about types of symbols, but don't need to keep track of
268 stack offsets in them. */
270 case LOC_REGPARM_ADDR
:
272 case LOC_BASEREG_ARG
:
273 case LOC_COMPUTED_ARG
:
276 /* Other types of symbols we just skip over. */
281 /* We have to look up the symbol because arguments can have
282 two entries (one a parameter, one a local) and the one we
283 want is the local, which lookup_symbol will find for us.
284 This includes gcc1 (not gcc2) on the sparc when passing a
285 small structure and gcc2 when the argument type is float
286 and it is passed as a double and converted to float by
287 the prologue (in the latter case the type of the LOC_ARG
288 symbol is double and the type of the LOC_LOCAL symbol is
290 /* But if the parameter name is null, don't try it.
291 Null parameter names occur on the RS/6000, for traceback tables.
292 FIXME, should we even print them? */
294 if (*DEPRECATED_SYMBOL_NAME (sym
))
298 (DEPRECATED_SYMBOL_NAME (sym
),
299 b
, VAR_DOMAIN
, (int *) NULL
, (struct symtab
**) NULL
);
300 if (SYMBOL_CLASS (nsym
) == LOC_REGISTER
)
302 /* There is a LOC_ARG/LOC_REGISTER pair. This means that
303 it was passed on the stack and loaded into a register,
304 or passed in a register and stored in a stack slot.
305 GDB 3.x used the LOC_ARG; GDB 4.0-4.11 used the LOC_REGISTER.
307 Reasons for using the LOC_ARG:
308 (1) because find_saved_registers may be slow for remote
310 (2) because registers are often re-used and stack slots
311 rarely (never?) are. Therefore using the stack slot is
312 much less likely to print garbage.
314 Reasons why we might want to use the LOC_REGISTER:
315 (1) So that the backtrace prints the same value as
316 "print foo". I see no compelling reason why this needs
317 to be the case; having the backtrace print the value which
318 was passed in, and "print foo" print the value as modified
319 within the called function, makes perfect sense to me.
321 Additional note: It might be nice if "info args" displayed
323 One more note: There is a case with sparc structure passing
324 where we need to use the LOC_REGISTER, but this is dealt with
325 by creating a single LOC_REGPARM in symbol reading. */
327 /* Leave sym (the LOC_ARG) alone. */
334 /* Print the current arg. */
336 ui_out_text (uiout
, ", ");
337 ui_out_wrap_hint (uiout
, " ");
339 annotate_arg_begin ();
341 list_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, NULL
);
342 fprintf_symbol_filtered (stb
->stream
, SYMBOL_PRINT_NAME (sym
),
343 SYMBOL_LANGUAGE (sym
), DMGL_PARAMS
| DMGL_ANSI
);
344 ui_out_field_stream (uiout
, "name", stb
);
345 annotate_arg_name_end ();
346 ui_out_text (uiout
, "=");
348 /* Avoid value_print because it will deref ref parameters. We just
349 want to print their addresses. Print ??? for args whose address
350 we do not know. We pass 2 as "recurse" to val_print because our
351 standard indentation here is 4 spaces, and val_print indents
352 2 for each recurse. */
353 val
= read_var_value (sym
, fi
);
355 annotate_arg_value (val
== NULL
? NULL
: VALUE_TYPE (val
));
359 val_print (VALUE_TYPE (val
), VALUE_CONTENTS (val
), 0,
361 stb
->stream
, 0, 0, 2, Val_no_prettyprint
);
362 ui_out_field_stream (uiout
, "value", stb
);
365 ui_out_text (uiout
, "???");
367 /* Invoke ui_out_tuple_end. */
368 do_cleanups (list_chain
);
376 /* Don't print nameless args in situations where we don't know
377 enough about the stack to find them. */
382 if (highest_offset
== -1)
383 start
= FRAME_ARGS_SKIP
;
385 start
= highest_offset
;
387 print_frame_nameless_args (fi
, start
, num
- args_printed
,
390 do_cleanups (old_chain
);
393 /* Pass the args the way catch_errors wants them. */
396 print_args_stub (void *args
)
399 struct print_args_args
*p
= (struct print_args_args
*) args
;
401 if (FRAME_NUM_ARGS_P ())
403 numargs
= FRAME_NUM_ARGS (p
->fi
);
404 gdb_assert (numargs
>= 0);
408 print_frame_args (p
->func
, p
->fi
, numargs
, p
->stream
);
412 /* Print information about a frame for frame "fi" at level "level".
413 Used in "where" output, also used to emit breakpoint or step
415 LEVEL is the level of the frame, or -1 if it is the
416 innermost frame but we don't want to print the level.
417 The meaning of the SOURCE argument is:
418 SRC_LINE: Print only source line
419 LOCATION: Print only location
420 LOC_AND_SRC: Print location and source line. */
423 print_frame_info (struct frame_info
*fi
, int level
, int source
, int args
)
425 struct symtab_and_line sal
;
429 if (get_frame_type (fi
) == DUMMY_FRAME
430 || get_frame_type (fi
) == SIGTRAMP_FRAME
)
432 struct cleanup
*uiout_cleanup
433 = make_cleanup_ui_out_tuple_begin_end (uiout
, "frame");
435 annotate_frame_begin (level
== -1 ? 0 : level
, get_frame_pc (fi
));
437 /* Do this regardless of SOURCE because we don't have any source
438 to list for this frame. */
441 ui_out_text (uiout
, "#");
442 ui_out_field_fmt_int (uiout
, 2, ui_left
, "level", level
);
444 if (ui_out_is_mi_like_p (uiout
))
446 annotate_frame_address ();
447 ui_out_field_core_addr (uiout
, "addr", get_frame_pc (fi
));
448 annotate_frame_address_end ();
451 if (get_frame_type (fi
) == DUMMY_FRAME
)
453 annotate_function_call ();
454 ui_out_field_string (uiout
, "func", "<function called from gdb>");
456 else if (get_frame_type (fi
) == SIGTRAMP_FRAME
)
458 annotate_signal_handler_caller ();
459 ui_out_field_string (uiout
, "func", "<signal handler called>");
461 ui_out_text (uiout
, "\n");
462 annotate_frame_end ();
464 do_cleanups (uiout_cleanup
);
468 /* If fi is not the innermost frame, that normally means that fi->pc
469 points to *after* the call instruction, and we want to get the
470 line containing the call, never the next line. But if the next
471 frame is a SIGTRAMP_FRAME or a DUMMY_FRAME, then the next frame
472 was not entered as the result of a call, and we want to get the
473 line containing fi->pc. */
474 find_frame_sal (fi
, &sal
);
476 location_print
= (source
== LOCATION
477 || source
== LOC_AND_ADDRESS
478 || source
== SRC_AND_LOC
);
480 if (location_print
|| !sal
.symtab
)
481 print_frame (fi
, level
, source
, args
, sal
);
483 source_print
= (source
== SRC_LINE
|| source
== SRC_AND_LOC
);
486 set_current_source_symtab_and_line (&sal
);
488 if (source_print
&& sal
.symtab
)
490 struct symtab_and_line cursal
;
492 int mid_statement
= (source
== SRC_LINE
) && (get_frame_pc (fi
) != sal
.pc
);
494 if (annotation_level
)
495 done
= identify_source_line (sal
.symtab
, sal
.line
, mid_statement
,
499 if (print_frame_info_listing_hook
)
500 print_frame_info_listing_hook (sal
.symtab
, sal
.line
, sal
.line
+ 1, 0);
503 /* We used to do this earlier, but that is clearly
504 wrong. This function is used by many different
505 parts of gdb, including normal_stop in infrun.c,
506 which uses this to print out the current PC
507 when we stepi/nexti into the middle of a source
508 line. Only the command line really wants this
509 behavior. Other UIs probably would like the
510 ability to decide for themselves if it is desired. */
511 if (addressprint
&& mid_statement
)
513 ui_out_field_core_addr (uiout
, "addr", get_frame_pc (fi
));
514 ui_out_text (uiout
, "\t");
517 print_source_lines (sal
.symtab
, sal
.line
, sal
.line
+ 1, 0);
520 /* Make sure we have at least a default source file */
521 set_default_source_symtab_and_line ();
522 cursal
= get_current_source_symtab_and_line ();
523 cursal
.line
= max (sal
.line
- get_lines_to_list () / 2, 1);
524 set_current_source_symtab_and_line (&cursal
);
528 set_default_breakpoint (1, get_frame_pc (fi
), sal
.symtab
, sal
.line
);
530 annotate_frame_end ();
532 gdb_flush (gdb_stdout
);
536 print_frame (struct frame_info
*fi
,
540 struct symtab_and_line sal
)
543 register char *funname
= 0;
544 enum language funlang
= language_unknown
;
545 struct ui_stream
*stb
;
546 struct cleanup
*old_chain
;
547 struct cleanup
*list_chain
;
549 stb
= ui_out_stream_new (uiout
);
550 old_chain
= make_cleanup_ui_out_stream_delete (stb
);
552 func
= find_pc_function (frame_address_in_block (fi
));
555 /* In certain pathological cases, the symtabs give the wrong
556 function (when we are in the first function in a file which
557 is compiled without debugging symbols, the previous function
558 is compiled with debugging symbols, and the "foo.o" symbol
559 that is supposed to tell us where the file with debugging symbols
560 ends has been truncated by ar because it is longer than 15
561 characters). This also occurs if the user uses asm() to create
562 a function but not stabs for it (in a file compiled -g).
564 So look in the minimal symbol tables as well, and if it comes
565 up with a larger address for the function use that instead.
566 I don't think this can ever cause any problems; there shouldn't
567 be any minimal symbols in the middle of a function; if this is
568 ever changed many parts of GDB will need to be changed (and we'll
569 create a find_pc_minimal_function or some such). */
571 struct minimal_symbol
*msymbol
= lookup_minimal_symbol_by_pc (frame_address_in_block (fi
));
573 && (SYMBOL_VALUE_ADDRESS (msymbol
)
574 > BLOCK_START (SYMBOL_BLOCK_VALUE (func
))))
577 /* There is no particular reason to think the line number
578 information is wrong. Someone might have just put in
579 a label with asm() but left the line numbers alone. */
580 /* In this case we have no way of knowing the source file
581 and line number, so don't print them. */
584 /* We also don't know anything about the function besides
585 its address and name. */
587 funname
= DEPRECATED_SYMBOL_NAME (msymbol
);
588 funlang
= SYMBOL_LANGUAGE (msymbol
);
592 /* I'd like to use SYMBOL_PRINT_NAME() here, to display the
593 demangled name that we already have stored in the symbol
594 table, but we stored a version with DMGL_PARAMS turned
595 on, and here we don't want to display parameters. So call
596 the demangler again, with DMGL_ANSI only. (Yes, I know
597 that printf_symbol_filtered() will again try to demangle
598 the name on the fly, but the issue is that if
599 cplus_demangle() fails here, it'll fail there too. So we
600 want to catch the failure ("demangled==NULL" case below)
601 here, while we still have our hands on the function
604 funname
= DEPRECATED_SYMBOL_NAME (func
);
605 funlang
= SYMBOL_LANGUAGE (func
);
606 if (funlang
== language_cplus
)
608 demangled
= cplus_demangle (funname
, DMGL_ANSI
);
609 if (demangled
== NULL
)
610 /* If the demangler fails, try the demangled name from
611 the symbol table. This'll have parameters, but
612 that's preferable to diplaying a mangled name. */
613 funname
= SYMBOL_PRINT_NAME (func
);
619 struct minimal_symbol
*msymbol
= lookup_minimal_symbol_by_pc (frame_address_in_block (fi
));
622 funname
= DEPRECATED_SYMBOL_NAME (msymbol
);
623 funlang
= SYMBOL_LANGUAGE (msymbol
);
627 annotate_frame_begin (level
== -1 ? 0 : level
, get_frame_pc (fi
));
629 list_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "frame");
633 ui_out_text (uiout
, "#");
634 ui_out_field_fmt_int (uiout
, 2, ui_left
, "level", level
);
637 if (get_frame_pc (fi
) != sal
.pc
639 || source
== LOC_AND_ADDRESS
)
641 annotate_frame_address ();
642 ui_out_field_core_addr (uiout
, "addr", get_frame_pc (fi
));
643 annotate_frame_address_end ();
644 ui_out_text (uiout
, " in ");
646 annotate_frame_function_name ();
647 fprintf_symbol_filtered (stb
->stream
, funname
? funname
: "??", funlang
,
649 ui_out_field_stream (uiout
, "func", stb
);
650 ui_out_wrap_hint (uiout
, " ");
651 annotate_frame_args ();
653 ui_out_text (uiout
, " (");
656 struct print_args_args args
;
657 struct cleanup
*args_list_chain
;
660 args
.stream
= gdb_stdout
;
661 args_list_chain
= make_cleanup_ui_out_list_begin_end (uiout
, "args");
662 catch_errors (print_args_stub
, &args
, "", RETURN_MASK_ALL
);
663 /* FIXME: args must be a list. If one argument is a string it will
664 have " that will not be properly escaped. */
665 /* Invoke ui_out_tuple_end. */
666 do_cleanups (args_list_chain
);
669 ui_out_text (uiout
, ")");
670 if (sal
.symtab
&& sal
.symtab
->filename
)
672 annotate_frame_source_begin ();
673 ui_out_wrap_hint (uiout
, " ");
674 ui_out_text (uiout
, " at ");
675 annotate_frame_source_file ();
676 ui_out_field_string (uiout
, "file", sal
.symtab
->filename
);
677 annotate_frame_source_file_end ();
678 ui_out_text (uiout
, ":");
679 annotate_frame_source_line ();
680 ui_out_field_int (uiout
, "line", sal
.line
);
681 annotate_frame_source_end ();
685 if (!funname
|| (!sal
.symtab
|| !sal
.symtab
->filename
))
687 char *lib
= PC_SOLIB (get_frame_pc (fi
));
690 annotate_frame_where ();
691 ui_out_wrap_hint (uiout
, " ");
692 ui_out_text (uiout
, " from ");
693 ui_out_field_string (uiout
, "from", lib
);
696 #endif /* PC_SOLIB */
698 /* do_cleanups will call ui_out_tuple_end() for us. */
699 do_cleanups (list_chain
);
700 ui_out_text (uiout
, "\n");
701 do_cleanups (old_chain
);
704 /* Show the frame info. If this is the tui, it will be shown in
705 the source display otherwise, nothing is done */
707 show_stack_frame (struct frame_info
*fi
)
712 /* Read a frame specification in whatever the appropriate format is.
713 Call error() if the specification is in any way invalid (i.e.
714 this function never returns NULL). */
717 parse_frame_specification (char *frame_exp
)
721 CORE_ADDR args
[MAXARGS
];
726 char *addr_string
, *p
;
727 struct cleanup
*tmp_cleanup
;
729 while (*frame_exp
== ' ')
734 if (numargs
> MAXARGS
)
735 error ("Too many args in frame specification");
736 /* Parse an argument. */
737 for (p
= frame_exp
; *p
&& *p
!= ' '; p
++)
739 addr_string
= savestring (frame_exp
, p
- frame_exp
);
744 tmp_cleanup
= make_cleanup (xfree
, addr_string
);
746 /* NOTE: we call parse_and_eval and then both
747 value_as_long and value_as_address rather than calling
748 parse_and_eval_long and parse_and_eval_address because
749 of the issue of potential side effects from evaluating
751 vp
= parse_and_eval (addr_string
);
753 level
= value_as_long (vp
);
755 args
[numargs
++] = value_as_address (vp
);
756 do_cleanups (tmp_cleanup
);
759 /* Skip spaces, move to possible next arg. */
769 if (deprecated_selected_frame
== NULL
)
770 error ("No selected frame.");
771 return deprecated_selected_frame
;
775 struct frame_info
*fid
=
776 find_relative_frame (get_current_frame (), &level
);
777 struct frame_info
*tfid
;
780 /* find_relative_frame was successful */
783 /* If SETUP_ARBITRARY_FRAME is defined, then frame specifications
784 take at least 2 addresses. It is important to detect this case
785 here so that "frame 100" does not give a confusing error message
786 like "frame specification requires two addresses". This of course
787 does not solve the "frame 100" problem for machines on which
788 a frame specification can be made with one address. To solve
789 that, we need a new syntax for a specifying a frame by address.
790 I think the cleanest syntax is $frame(0x45) ($frame(0x23,0x45) for
791 two args, etc.), but people might think that is too much typing,
792 so I guess *0x23,0x45 would be a possible alternative (commas
793 really should be used instead of spaces to delimit; using spaces
794 normally works in an expression). */
795 #ifdef SETUP_ARBITRARY_FRAME
796 error ("No frame %s", paddr_d (args
[0]));
799 /* If (s)he specifies the frame with an address, he deserves what
800 (s)he gets. Still, give the highest one that matches. */
802 for (fid
= get_current_frame ();
803 fid
&& get_frame_base (fid
) != args
[0];
804 fid
= get_prev_frame (fid
))
808 while ((tfid
= get_prev_frame (fid
)) &&
809 (get_frame_base (tfid
) == args
[0]))
812 /* We couldn't identify the frame as an existing frame, but
813 perhaps we can create one with a single argument. */
817 #ifdef SETUP_ARBITRARY_FRAME
818 return SETUP_ARBITRARY_FRAME (numargs
, args
);
820 /* Usual case. Do it here rather than have everyone supply
821 a SETUP_ARBITRARY_FRAME that does this. */
823 return create_new_frame (args
[0], 0);
824 error ("Too many args in frame specification");
831 /* Print verbosely the selected frame or the frame at address ADDR.
832 This means absolutely all information in the frame is printed. */
835 frame_info (char *addr_exp
, int from_tty
)
837 struct frame_info
*fi
;
838 struct symtab_and_line sal
;
841 struct frame_info
*calling_frame_info
;
842 int i
, count
, numregs
;
844 enum language funlang
= language_unknown
;
845 const char *pc_regname
;
847 if (!target_has_stack
)
850 /* Name of the value returned by get_frame_pc(). Per comments, "pc"
851 is not a good name. */
853 /* OK, this is weird. The PC_REGNUM hardware register's value can
854 easily not match that of the internal value returned by
856 pc_regname
= REGISTER_NAME (PC_REGNUM
);
858 /* But then, this is weird to. Even without PC_REGNUM, an
859 architectures will often have a hardware register called "pc",
860 and that register's value, again, can easily not match
864 fi
= parse_frame_specification (addr_exp
);
866 error ("Invalid frame specified.");
868 find_frame_sal (fi
, &sal
);
869 func
= get_frame_function (fi
);
870 /* FIXME: cagney/2002-11-28: Why bother? Won't sal.symtab contain
872 s
= find_pc_symtab (get_frame_pc (fi
));
875 /* I'd like to use SYMBOL_PRINT_NAME() here, to display
876 * the demangled name that we already have stored in
877 * the symbol table, but we stored a version with
878 * DMGL_PARAMS turned on, and here we don't want
879 * to display parameters. So call the demangler again,
880 * with DMGL_ANSI only. RT
881 * (Yes, I know that printf_symbol_filtered() will
882 * again try to demangle the name on the fly, but
883 * the issue is that if cplus_demangle() fails here,
884 * it'll fail there too. So we want to catch the failure
885 * ("demangled==NULL" case below) here, while we still
886 * have our hands on the function symbol.)
889 funname
= DEPRECATED_SYMBOL_NAME (func
);
890 funlang
= SYMBOL_LANGUAGE (func
);
891 if (funlang
== language_cplus
)
893 demangled
= cplus_demangle (funname
, DMGL_ANSI
);
894 /* If the demangler fails, try the demangled name
895 * from the symbol table. This'll have parameters,
896 * but that's preferable to diplaying a mangled name.
898 if (demangled
== NULL
)
899 funname
= SYMBOL_PRINT_NAME (func
);
904 register struct minimal_symbol
*msymbol
= lookup_minimal_symbol_by_pc (get_frame_pc (fi
));
907 funname
= DEPRECATED_SYMBOL_NAME (msymbol
);
908 funlang
= SYMBOL_LANGUAGE (msymbol
);
911 calling_frame_info
= get_prev_frame (fi
);
913 if (!addr_exp
&& frame_relative_level (deprecated_selected_frame
) >= 0)
915 printf_filtered ("Stack level %d, frame at ",
916 frame_relative_level (deprecated_selected_frame
));
917 print_address_numeric (get_frame_base (fi
), 1, gdb_stdout
);
918 printf_filtered (":\n");
922 printf_filtered ("Stack frame at ");
923 print_address_numeric (get_frame_base (fi
), 1, gdb_stdout
);
924 printf_filtered (":\n");
926 printf_filtered (" %s = ", pc_regname
);
927 print_address_numeric (get_frame_pc (fi
), 1, gdb_stdout
);
932 printf_filtered (" in ");
933 fprintf_symbol_filtered (gdb_stdout
, funname
, funlang
,
934 DMGL_ANSI
| DMGL_PARAMS
);
938 printf_filtered (" (%s:%d)", sal
.symtab
->filename
, sal
.line
);
939 puts_filtered ("; ");
941 printf_filtered ("saved %s ", pc_regname
);
942 print_address_numeric (frame_pc_unwind (fi
), 1, gdb_stdout
);
943 printf_filtered ("\n");
947 frameless
= FRAMELESS_FUNCTION_INVOCATION (fi
);
949 printf_filtered (" (FRAMELESS),");
952 if (calling_frame_info
)
954 printf_filtered (" called by frame at ");
955 print_address_numeric (get_frame_base (calling_frame_info
),
958 if (get_next_frame (fi
) && calling_frame_info
)
961 if (get_next_frame (fi
))
963 printf_filtered (" caller of frame at ");
964 print_address_numeric (get_frame_base (get_next_frame (fi
)), 1,
967 if (get_next_frame (fi
) || calling_frame_info
)
968 puts_filtered ("\n");
970 printf_filtered (" source language %s.\n",
971 language_str (s
->language
));
973 #ifdef PRINT_EXTRA_FRAME_INFO
974 PRINT_EXTRA_FRAME_INFO (fi
);
978 /* Address of the argument list for this frame, or 0. */
979 CORE_ADDR arg_list
= get_frame_args_address (fi
);
980 /* Number of args for this frame, or -1 if unknown. */
984 printf_filtered (" Arglist at unknown address.\n");
987 printf_filtered (" Arglist at ");
988 print_address_numeric (arg_list
, 1, gdb_stdout
);
989 printf_filtered (",");
991 if (!FRAME_NUM_ARGS_P ())
994 puts_filtered (" args: ");
998 numargs
= FRAME_NUM_ARGS (fi
);
999 gdb_assert (numargs
>= 0);
1001 puts_filtered (" no args.");
1002 else if (numargs
== 1)
1003 puts_filtered (" 1 arg: ");
1005 printf_filtered (" %d args: ", numargs
);
1007 print_frame_args (func
, fi
, numargs
, gdb_stdout
);
1008 puts_filtered ("\n");
1012 /* Address of the local variables for this frame, or 0. */
1013 CORE_ADDR arg_list
= get_frame_locals_address (fi
);
1016 printf_filtered (" Locals at unknown address,");
1019 printf_filtered (" Locals at ");
1020 print_address_numeric (arg_list
, 1, gdb_stdout
);
1021 printf_filtered (",");
1025 if (DEPRECATED_FRAME_INIT_SAVED_REGS_P ()
1026 && get_frame_saved_regs (fi
) == NULL
)
1027 DEPRECATED_FRAME_INIT_SAVED_REGS (fi
);
1028 /* Print as much information as possible on the location of all the
1031 enum lval_type lval
;
1039 /* The sp is special; what's displayed isn't the save address, but
1040 the value of the previous frame's sp. This is a legacy thing,
1041 at one stage the frame cached the previous frame's SP instead
1042 of its address, hence it was easiest to just display the cached
1046 /* Find out the location of the saved stack pointer with out
1047 actually evaluating it. */
1048 frame_register_unwind (fi
, SP_REGNUM
, &optimized
, &lval
, &addr
,
1050 if (!optimized
&& lval
== not_lval
)
1052 char value
[MAX_REGISTER_SIZE
];
1054 frame_register_unwind (fi
, SP_REGNUM
, &optimized
, &lval
, &addr
,
1056 /* NOTE: cagney/2003-05-22: This is assuming that the
1057 stack pointer was packed as an unsigned integer. That
1058 may or may not be valid. */
1059 sp
= extract_unsigned_integer (value
, REGISTER_RAW_SIZE (SP_REGNUM
));
1060 printf_filtered (" Previous frame's sp is ");
1061 print_address_numeric (sp
, 1, gdb_stdout
);
1062 printf_filtered ("\n");
1065 else if (!optimized
&& lval
== lval_memory
)
1067 printf_filtered (" Previous frame's sp at ");
1068 print_address_numeric (addr
, 1, gdb_stdout
);
1069 printf_filtered ("\n");
1072 else if (!optimized
&& lval
== lval_register
)
1074 printf_filtered (" Previous frame's sp in %s\n",
1075 REGISTER_NAME (realnum
));
1078 /* else keep quiet. */
1082 numregs
= NUM_REGS
+ NUM_PSEUDO_REGS
;
1083 for (i
= 0; i
< numregs
; i
++)
1086 /* Find out the location of the saved register without
1087 fetching the corresponding value. */
1088 frame_register_unwind (fi
, i
, &optimized
, &lval
, &addr
, &realnum
,
1090 /* For moment, only display registers that were saved on the
1092 if (!optimized
&& lval
== lval_memory
)
1095 puts_filtered (" Saved registers:\n ");
1097 puts_filtered (",");
1099 printf_filtered (" %s at ", REGISTER_NAME (i
));
1100 print_address_numeric (addr
, 1, gdb_stdout
);
1104 if (count
|| need_nl
)
1105 puts_filtered ("\n");
1110 /* Set a limit on the number of frames printed by default in a
1113 static int backtrace_limit
;
1116 set_backtrace_limit_command (char *count_exp
, int from_tty
)
1118 int count
= parse_and_eval_long (count_exp
);
1121 error ("Negative argument not meaningful as backtrace limit.");
1123 backtrace_limit
= count
;
1127 backtrace_limit_info (char *arg
, int from_tty
)
1130 error ("\"Info backtrace-limit\" takes no arguments.");
1132 printf_unfiltered ("Backtrace limit: %d.\n", backtrace_limit
);
1136 /* Print briefly all stack frames or just the innermost COUNT frames. */
1138 static void backtrace_command_1 (char *count_exp
, int show_locals
,
1141 backtrace_command_1 (char *count_exp
, int show_locals
, int from_tty
)
1143 struct frame_info
*fi
;
1146 register struct frame_info
*trailing
;
1147 register int trailing_level
;
1149 if (!target_has_stack
)
1150 error ("No stack.");
1152 /* The following code must do two things. First, it must
1153 set the variable TRAILING to the frame from which we should start
1154 printing. Second, it must set the variable count to the number
1155 of frames which we should print, or -1 if all of them. */
1156 trailing
= get_current_frame ();
1158 /* The target can be in a state where there is no valid frames
1159 (e.g., just connected). */
1160 if (trailing
== NULL
)
1161 error ("No stack.");
1166 count
= parse_and_eval_long (count_exp
);
1169 struct frame_info
*current
;
1174 while (current
&& count
--)
1177 current
= get_prev_frame (current
);
1180 /* Will stop when CURRENT reaches the top of the stack. TRAILING
1181 will be COUNT below it. */
1185 trailing
= get_prev_frame (trailing
);
1186 current
= get_prev_frame (current
);
1198 struct partial_symtab
*ps
;
1200 /* Read in symbols for all of the frames. Need to do this in
1201 a separate pass so that "Reading in symbols for xxx" messages
1202 don't screw up the appearance of the backtrace. Also
1203 if people have strong opinions against reading symbols for
1204 backtrace this may have to be an option. */
1208 fi
= get_prev_frame (fi
))
1211 ps
= find_pc_psymtab (frame_address_in_block (fi
));
1213 PSYMTAB_TO_SYMTAB (ps
); /* Force syms to come in */
1217 for (i
= 0, fi
= trailing
;
1219 i
++, fi
= get_prev_frame (fi
))
1223 /* Don't use print_stack_frame; if an error() occurs it probably
1224 means further attempts to backtrace would fail (on the other
1225 hand, perhaps the code does or could be fixed to make sure
1226 the frame->prev field gets set to NULL in that case). */
1227 print_frame_info (fi
, trailing_level
+ i
, 0, 1);
1229 print_frame_local_vars (fi
, 1, gdb_stdout
);
1232 /* If we've stopped before the end, mention that. */
1234 printf_filtered ("(More stack frames follow...)\n");
1238 backtrace_command (char *arg
, int from_tty
)
1240 struct cleanup
*old_chain
= (struct cleanup
*) NULL
;
1241 char **argv
= (char **) NULL
;
1242 int argIndicatingFullTrace
= (-1), totArgLen
= 0, argc
= 0;
1245 if (arg
!= (char *) NULL
)
1249 argv
= buildargv (arg
);
1250 old_chain
= make_cleanup_freeargv (argv
);
1252 for (i
= 0; (argv
[i
] != (char *) NULL
); i
++)
1256 for (j
= 0; (j
< strlen (argv
[i
])); j
++)
1257 argv
[i
][j
] = tolower (argv
[i
][j
]);
1259 if (argIndicatingFullTrace
< 0 && subset_compare (argv
[i
], "full"))
1260 argIndicatingFullTrace
= argc
;
1264 totArgLen
+= strlen (argv
[i
]);
1268 if (argIndicatingFullTrace
>= 0)
1272 argPtr
= (char *) xmalloc (totArgLen
+ 1);
1277 memset (argPtr
, 0, totArgLen
+ 1);
1278 for (i
= 0; (i
< (argc
+ 1)); i
++)
1280 if (i
!= argIndicatingFullTrace
)
1282 strcat (argPtr
, argv
[i
]);
1283 strcat (argPtr
, " ");
1289 argPtr
= (char *) NULL
;
1293 backtrace_command_1 (argPtr
, (argIndicatingFullTrace
>= 0), from_tty
);
1295 if (argIndicatingFullTrace
>= 0 && totArgLen
> 0)
1299 do_cleanups (old_chain
);
1302 static void backtrace_full_command (char *arg
, int from_tty
);
1304 backtrace_full_command (char *arg
, int from_tty
)
1306 backtrace_command_1 (arg
, 1, from_tty
);
1310 /* Print the local variables of a block B active in FRAME.
1311 Return 1 if any variables were printed; 0 otherwise. */
1314 print_block_frame_locals (struct block
*b
, register struct frame_info
*fi
,
1315 int num_tabs
, register struct ui_file
*stream
)
1318 register struct symbol
*sym
;
1319 register int values_printed
= 0;
1321 ALL_BLOCK_SYMBOLS (b
, i
, sym
)
1323 switch (SYMBOL_CLASS (sym
))
1331 for (j
= 0; j
< num_tabs
; j
++)
1332 fputs_filtered ("\t", stream
);
1333 fputs_filtered (SYMBOL_PRINT_NAME (sym
), stream
);
1334 fputs_filtered (" = ", stream
);
1335 print_variable_value (sym
, fi
, stream
);
1336 fprintf_filtered (stream
, "\n");
1340 /* Ignore symbols which are not locals. */
1344 return values_printed
;
1347 /* Same, but print labels. */
1350 print_block_frame_labels (struct block
*b
, int *have_default
,
1351 register struct ui_file
*stream
)
1354 register struct symbol
*sym
;
1355 register int values_printed
= 0;
1357 ALL_BLOCK_SYMBOLS (b
, i
, sym
)
1359 if (STREQ (DEPRECATED_SYMBOL_NAME (sym
), "default"))
1365 if (SYMBOL_CLASS (sym
) == LOC_LABEL
)
1367 struct symtab_and_line sal
;
1368 sal
= find_pc_line (SYMBOL_VALUE_ADDRESS (sym
), 0);
1370 fputs_filtered (SYMBOL_PRINT_NAME (sym
), stream
);
1373 fprintf_filtered (stream
, " ");
1374 print_address_numeric (SYMBOL_VALUE_ADDRESS (sym
), 1, stream
);
1376 fprintf_filtered (stream
, " in file %s, line %d\n",
1377 sal
.symtab
->filename
, sal
.line
);
1380 return values_printed
;
1383 /* Print on STREAM all the local variables in frame FRAME,
1384 including all the blocks active in that frame
1387 Returns 1 if the job was done,
1388 or 0 if nothing was printed because we have no info
1389 on the function running in FRAME. */
1392 print_frame_local_vars (register struct frame_info
*fi
, register int num_tabs
,
1393 register struct ui_file
*stream
)
1395 register struct block
*block
= get_frame_block (fi
, 0);
1396 register int values_printed
= 0;
1400 fprintf_filtered (stream
, "No symbol table info available.\n");
1406 if (print_block_frame_locals (block
, fi
, num_tabs
, stream
))
1408 /* After handling the function's top-level block, stop.
1409 Don't continue to its superblock, the block of
1410 per-file symbols. */
1411 if (BLOCK_FUNCTION (block
))
1413 block
= BLOCK_SUPERBLOCK (block
);
1416 if (!values_printed
)
1418 fprintf_filtered (stream
, "No locals.\n");
1422 /* Same, but print labels. */
1425 print_frame_label_vars (register struct frame_info
*fi
, int this_level_only
,
1426 register struct ui_file
*stream
)
1428 register struct blockvector
*bl
;
1429 register struct block
*block
= get_frame_block (fi
, 0);
1430 register int values_printed
= 0;
1431 int index
, have_default
= 0;
1432 char *blocks_printed
;
1433 CORE_ADDR pc
= get_frame_pc (fi
);
1437 fprintf_filtered (stream
, "No symbol table info available.\n");
1441 bl
= blockvector_for_pc (BLOCK_END (block
) - 4, &index
);
1442 blocks_printed
= (char *) alloca (BLOCKVECTOR_NBLOCKS (bl
) * sizeof (char));
1443 memset (blocks_printed
, 0, BLOCKVECTOR_NBLOCKS (bl
) * sizeof (char));
1447 CORE_ADDR end
= BLOCK_END (block
) - 4;
1450 if (bl
!= blockvector_for_pc (end
, &index
))
1451 error ("blockvector blotch");
1452 if (BLOCKVECTOR_BLOCK (bl
, index
) != block
)
1453 error ("blockvector botch");
1454 last_index
= BLOCKVECTOR_NBLOCKS (bl
);
1457 /* Don't print out blocks that have gone by. */
1458 while (index
< last_index
1459 && BLOCK_END (BLOCKVECTOR_BLOCK (bl
, index
)) < pc
)
1462 while (index
< last_index
1463 && BLOCK_END (BLOCKVECTOR_BLOCK (bl
, index
)) < end
)
1465 if (blocks_printed
[index
] == 0)
1467 if (print_block_frame_labels (BLOCKVECTOR_BLOCK (bl
, index
), &have_default
, stream
))
1469 blocks_printed
[index
] = 1;
1475 if (values_printed
&& this_level_only
)
1478 /* After handling the function's top-level block, stop.
1479 Don't continue to its superblock, the block of
1480 per-file symbols. */
1481 if (BLOCK_FUNCTION (block
))
1483 block
= BLOCK_SUPERBLOCK (block
);
1486 if (!values_printed
&& !this_level_only
)
1488 fprintf_filtered (stream
, "No catches.\n");
1494 locals_info (char *args
, int from_tty
)
1496 if (!deprecated_selected_frame
)
1497 error ("No frame selected.");
1498 print_frame_local_vars (deprecated_selected_frame
, 0, gdb_stdout
);
1502 catch_info (char *ignore
, int from_tty
)
1504 struct symtab_and_line
*sal
;
1506 /* Check for target support for exception handling */
1507 sal
= target_enable_exception_callback (EX_EVENT_CATCH
, 1);
1510 /* Currently not handling this */
1511 /* Ideally, here we should interact with the C++ runtime
1512 system to find the list of active handlers, etc. */
1513 fprintf_filtered (gdb_stdout
, "Info catch not supported with this target/compiler combination.\n");
1515 if (!deprecated_selected_frame
)
1516 error ("No frame selected.");
1521 /* Assume g++ compiled code -- old v 4.16 behaviour */
1522 if (!deprecated_selected_frame
)
1523 error ("No frame selected.");
1525 print_frame_label_vars (deprecated_selected_frame
, 0, gdb_stdout
);
1530 print_frame_arg_vars (register struct frame_info
*fi
,
1531 register struct ui_file
*stream
)
1533 struct symbol
*func
= get_frame_function (fi
);
1534 register struct block
*b
;
1536 register struct symbol
*sym
, *sym2
;
1537 register int values_printed
= 0;
1541 fprintf_filtered (stream
, "No symbol table info available.\n");
1545 b
= SYMBOL_BLOCK_VALUE (func
);
1546 ALL_BLOCK_SYMBOLS (b
, i
, sym
)
1548 switch (SYMBOL_CLASS (sym
))
1554 case LOC_REGPARM_ADDR
:
1555 case LOC_BASEREG_ARG
:
1556 case LOC_COMPUTED_ARG
:
1558 fputs_filtered (SYMBOL_PRINT_NAME (sym
), stream
);
1559 fputs_filtered (" = ", stream
);
1561 /* We have to look up the symbol because arguments can have
1562 two entries (one a parameter, one a local) and the one we
1563 want is the local, which lookup_symbol will find for us.
1564 This includes gcc1 (not gcc2) on the sparc when passing a
1565 small structure and gcc2 when the argument type is float
1566 and it is passed as a double and converted to float by
1567 the prologue (in the latter case the type of the LOC_ARG
1568 symbol is double and the type of the LOC_LOCAL symbol is
1569 float). There are also LOC_ARG/LOC_REGISTER pairs which
1570 are not combined in symbol-reading. */
1572 sym2
= lookup_symbol (DEPRECATED_SYMBOL_NAME (sym
),
1573 b
, VAR_DOMAIN
, (int *) NULL
, (struct symtab
**) NULL
);
1574 print_variable_value (sym2
, fi
, stream
);
1575 fprintf_filtered (stream
, "\n");
1579 /* Don't worry about things which aren't arguments. */
1583 if (!values_printed
)
1585 fprintf_filtered (stream
, "No arguments.\n");
1590 args_info (char *ignore
, int from_tty
)
1592 if (!deprecated_selected_frame
)
1593 error ("No frame selected.");
1594 print_frame_arg_vars (deprecated_selected_frame
, gdb_stdout
);
1599 args_plus_locals_info (char *ignore
, int from_tty
)
1601 args_info (ignore
, from_tty
);
1602 locals_info (ignore
, from_tty
);
1606 /* Select frame FI. Also print the stack frame and show the source if
1607 this is the tui version. */
1609 select_and_print_frame (struct frame_info
*fi
)
1614 print_stack_frame (fi
, frame_relative_level (fi
), 1);
1618 /* Return the symbol-block in which the selected frame is executing.
1619 Can return zero under various legitimate circumstances.
1621 If ADDR_IN_BLOCK is non-zero, set *ADDR_IN_BLOCK to the relevant
1622 code address within the block returned. We use this to decide
1623 which macros are in scope. */
1626 get_selected_block (CORE_ADDR
*addr_in_block
)
1628 if (!target_has_stack
)
1631 /* NOTE: cagney/2002-11-28: Why go to all this effort to not create
1632 a selected/current frame? Perhaphs this function is called,
1633 indirectly, by WFI in "infrun.c" where avoiding the creation of
1634 an inner most frame is very important (it slows down single
1635 step). I suspect, though that this was true in the deep dark
1636 past but is no longer the case. A mindless look at all the
1637 callers tends to support this theory. I think we should be able
1638 to assume that there is always a selcted frame. */
1639 /* gdb_assert (deprecated_selected_frame != NULL); So, do you feel
1641 if (!deprecated_selected_frame
)
1643 CORE_ADDR pc
= read_pc ();
1644 if (addr_in_block
!= NULL
)
1645 *addr_in_block
= pc
;
1646 return block_for_pc (pc
);
1648 return get_frame_block (deprecated_selected_frame
, addr_in_block
);
1651 /* Find a frame a certain number of levels away from FRAME.
1652 LEVEL_OFFSET_PTR points to an int containing the number of levels.
1653 Positive means go to earlier frames (up); negative, the reverse.
1654 The int that contains the number of levels is counted toward
1655 zero as the frames for those levels are found.
1656 If the top or bottom frame is reached, that frame is returned,
1657 but the final value of *LEVEL_OFFSET_PTR is nonzero and indicates
1658 how much farther the original request asked to go. */
1661 find_relative_frame (register struct frame_info
*frame
,
1662 register int *level_offset_ptr
)
1664 register struct frame_info
*prev
;
1665 register struct frame_info
*frame1
;
1667 /* Going up is simple: just do get_prev_frame enough times
1668 or until initial frame is reached. */
1669 while (*level_offset_ptr
> 0)
1671 prev
= get_prev_frame (frame
);
1674 (*level_offset_ptr
)--;
1677 /* Going down is just as simple. */
1678 if (*level_offset_ptr
< 0)
1680 while (*level_offset_ptr
< 0)
1682 frame1
= get_next_frame (frame
);
1686 (*level_offset_ptr
)++;
1692 /* The "select_frame" command. With no arg, NOP.
1693 With arg LEVEL_EXP, select the frame at level LEVEL if it is a
1694 valid level. Otherwise, treat level_exp as an address expression
1695 and select it. See parse_frame_specification for more info on proper
1696 frame expressions. */
1699 select_frame_command (char *level_exp
, int from_tty
)
1701 struct frame_info
*frame
;
1702 int level
= frame_relative_level (deprecated_selected_frame
);
1704 if (!target_has_stack
)
1705 error ("No stack.");
1707 frame
= parse_frame_specification (level_exp
);
1709 select_frame (frame
);
1710 if (level
!= frame_relative_level (deprecated_selected_frame
))
1711 selected_frame_level_changed_event (frame_relative_level (deprecated_selected_frame
));
1714 /* The "frame" command. With no arg, print selected frame briefly.
1715 With arg, behaves like select_frame and then prints the selected
1719 frame_command (char *level_exp
, int from_tty
)
1721 select_frame_command (level_exp
, from_tty
);
1722 print_stack_frame (deprecated_selected_frame
,
1723 frame_relative_level (deprecated_selected_frame
), 1);
1726 /* The XDB Compatibility command to print the current frame. */
1729 current_frame_command (char *level_exp
, int from_tty
)
1731 if (target_has_stack
== 0 || deprecated_selected_frame
== 0)
1732 error ("No stack.");
1733 print_stack_frame (deprecated_selected_frame
,
1734 frame_relative_level (deprecated_selected_frame
), 1);
1737 /* Select the frame up one or COUNT stack levels
1738 from the previously selected frame, and print it briefly. */
1742 up_silently_base (char *count_exp
)
1744 register struct frame_info
*fi
;
1745 int count
= 1, count1
;
1747 count
= parse_and_eval_long (count_exp
);
1750 if (target_has_stack
== 0 || deprecated_selected_frame
== 0)
1751 error ("No stack.");
1753 fi
= find_relative_frame (deprecated_selected_frame
, &count1
);
1754 if (count1
!= 0 && count_exp
== 0)
1755 error ("Initial frame selected; you cannot go up.");
1757 selected_frame_level_changed_event (frame_relative_level (deprecated_selected_frame
));
1761 up_silently_command (char *count_exp
, int from_tty
)
1763 up_silently_base (count_exp
);
1767 up_command (char *count_exp
, int from_tty
)
1769 up_silently_base (count_exp
);
1770 print_stack_frame (deprecated_selected_frame
,
1771 frame_relative_level (deprecated_selected_frame
), 1);
1774 /* Select the frame down one or COUNT stack levels
1775 from the previously selected frame, and print it briefly. */
1779 down_silently_base (char *count_exp
)
1781 register struct frame_info
*frame
;
1782 int count
= -1, count1
;
1784 count
= -parse_and_eval_long (count_exp
);
1787 if (target_has_stack
== 0 || deprecated_selected_frame
== 0)
1788 error ("No stack.");
1790 frame
= find_relative_frame (deprecated_selected_frame
, &count1
);
1791 if (count1
!= 0 && count_exp
== 0)
1794 /* We only do this if count_exp is not specified. That way "down"
1795 means to really go down (and let me know if that is
1796 impossible), but "down 9999" can be used to mean go all the way
1797 down without getting an error. */
1799 error ("Bottom (i.e., innermost) frame selected; you cannot go down.");
1802 select_frame (frame
);
1803 selected_frame_level_changed_event (frame_relative_level (deprecated_selected_frame
));
1808 down_silently_command (char *count_exp
, int from_tty
)
1810 down_silently_base (count_exp
);
1814 down_command (char *count_exp
, int from_tty
)
1816 down_silently_base (count_exp
);
1817 print_stack_frame (deprecated_selected_frame
,
1818 frame_relative_level (deprecated_selected_frame
), 1);
1822 return_command (char *retval_exp
, int from_tty
)
1824 struct symbol
*thisfun
;
1825 CORE_ADDR selected_frame_addr
;
1826 CORE_ADDR selected_frame_pc
;
1827 struct frame_info
*frame
;
1828 struct value
*return_value
= NULL
;
1830 if (deprecated_selected_frame
== NULL
)
1831 error ("No selected frame.");
1832 thisfun
= get_frame_function (deprecated_selected_frame
);
1833 selected_frame_addr
= get_frame_base (deprecated_selected_frame
);
1834 selected_frame_pc
= get_frame_pc (deprecated_selected_frame
);
1836 /* Compute the return value (if any -- possibly getting errors here). */
1840 struct type
*return_type
= NULL
;
1842 return_value
= parse_and_eval (retval_exp
);
1844 /* Cast return value to the return type of the function. */
1845 if (thisfun
!= NULL
)
1846 return_type
= TYPE_TARGET_TYPE (SYMBOL_TYPE (thisfun
));
1847 if (return_type
== NULL
)
1848 return_type
= builtin_type_int
;
1849 return_value
= value_cast (return_type
, return_value
);
1851 /* Make sure we have fully evaluated it, since
1852 it might live in the stack frame we're about to pop. */
1853 if (VALUE_LAZY (return_value
))
1854 value_fetch_lazy (return_value
);
1857 /* If interactive, require confirmation. */
1863 if (!query ("Make %s return now? ", SYMBOL_PRINT_NAME (thisfun
)))
1865 error ("Not confirmed.");
1869 else if (!query ("Make selected stack frame return now? "))
1870 error ("Not confirmed.");
1873 /* FIXME: cagney/2003-01-18: Rather than pop each frame in turn,
1874 this code should just go straight to the relevant frame and pop
1877 /* Do the real work. Pop until the specified frame is current. We
1878 use this method because the deprecated_selected_frame is not
1879 valid after a frame_pop(). The pc comparison makes this work
1880 even if the selected frame shares its fp with another frame. */
1882 /* FIXME: cagney/32003-03-12: This code should use frame_id_eq().
1883 Unfortunatly, that function doesn't yet include the PC in any
1884 frame ID comparison. */
1886 while (selected_frame_addr
!= get_frame_base (frame
= get_current_frame ())
1887 || selected_frame_pc
!= get_frame_pc (frame
))
1888 frame_pop (get_current_frame ());
1890 /* Then pop that frame. */
1892 frame_pop (get_current_frame ());
1894 /* Compute the return value (if any) and store in the place
1895 for return values. */
1898 set_return_value (return_value
);
1900 /* If we are at the end of a call dummy now, pop the dummy frame too. */
1902 /* FIXME: cagney/2003-01-18: This is silly. Instead of popping all
1903 the frames except the dummy, and then, as an afterthought,
1904 popping the dummy frame, this code should just pop through to the
1907 if (CALL_DUMMY_HAS_COMPLETED (read_pc(), read_sp (),
1908 get_frame_base (get_current_frame ())))
1909 frame_pop (get_current_frame ());
1911 /* If interactive, print the frame that is now current. */
1914 frame_command ("0", 1);
1916 select_frame_command ("0", 0);
1919 /* Sets the scope to input function name, provided that the
1920 function is within the current stack frame */
1922 struct function_bounds
1924 CORE_ADDR low
, high
;
1927 static void func_command (char *arg
, int from_tty
);
1929 func_command (char *arg
, int from_tty
)
1931 struct frame_info
*fp
;
1933 struct symtabs_and_lines sals
;
1936 struct function_bounds
*func_bounds
= (struct function_bounds
*) NULL
;
1938 if (arg
!= (char *) NULL
)
1941 fp
= parse_frame_specification ("0");
1942 sals
= decode_line_spec (arg
, 1);
1943 func_bounds
= (struct function_bounds
*) xmalloc (
1944 sizeof (struct function_bounds
) * sals
.nelts
);
1945 for (i
= 0; (i
< sals
.nelts
&& !found
); i
++)
1947 if (sals
.sals
[i
].pc
== (CORE_ADDR
) 0 ||
1948 find_pc_partial_function (sals
.sals
[i
].pc
,
1950 &func_bounds
[i
].low
,
1951 &func_bounds
[i
].high
) == 0)
1953 func_bounds
[i
].low
=
1954 func_bounds
[i
].high
= (CORE_ADDR
) NULL
;
1960 for (i
= 0; (i
< sals
.nelts
&& !found
); i
++)
1961 found
= (get_frame_pc (fp
) >= func_bounds
[i
].low
&&
1962 get_frame_pc (fp
) < func_bounds
[i
].high
);
1966 fp
= find_relative_frame (fp
, &level
);
1969 while (!found
&& level
== 0);
1972 xfree (func_bounds
);
1975 printf_filtered ("'%s' not within current stack frame.\n", arg
);
1976 else if (fp
!= deprecated_selected_frame
)
1977 select_and_print_frame (fp
);
1980 /* Gets the language of the current frame. */
1983 get_frame_language (void)
1985 register struct symtab
*s
;
1986 enum language flang
; /* The language of the current frame */
1988 if (deprecated_selected_frame
)
1990 s
= find_pc_symtab (get_frame_pc (deprecated_selected_frame
));
1992 flang
= s
->language
;
1994 flang
= language_unknown
;
1997 flang
= language_unknown
;
2003 _initialize_stack (void)
2006 backtrace_limit
= 30;
2009 add_com ("return", class_stack
, return_command
,
2010 "Make selected stack frame return to its caller.\n\
2011 Control remains in the debugger, but when you continue\n\
2012 execution will resume in the frame above the one now selected.\n\
2013 If an argument is given, it is an expression for the value to return.");
2015 add_com ("up", class_stack
, up_command
,
2016 "Select and print stack frame that called this one.\n\
2017 An argument says how many frames up to go.");
2018 add_com ("up-silently", class_support
, up_silently_command
,
2019 "Same as the `up' command, but does not print anything.\n\
2020 This is useful in command scripts.");
2022 add_com ("down", class_stack
, down_command
,
2023 "Select and print stack frame called by this one.\n\
2024 An argument says how many frames down to go.");
2025 add_com_alias ("do", "down", class_stack
, 1);
2026 add_com_alias ("dow", "down", class_stack
, 1);
2027 add_com ("down-silently", class_support
, down_silently_command
,
2028 "Same as the `down' command, but does not print anything.\n\
2029 This is useful in command scripts.");
2031 add_com ("frame", class_stack
, frame_command
,
2032 "Select and print a stack frame.\n\
2033 With no argument, print the selected stack frame. (See also \"info frame\").\n\
2034 An argument specifies the frame to select.\n\
2035 It can be a stack frame number or the address of the frame.\n\
2036 With argument, nothing is printed if input is coming from\n\
2037 a command file or a user-defined command.");
2039 add_com_alias ("f", "frame", class_stack
, 1);
2043 add_com ("L", class_stack
, current_frame_command
,
2044 "Print the current stack frame.\n");
2045 add_com_alias ("V", "frame", class_stack
, 1);
2047 add_com ("select-frame", class_stack
, select_frame_command
,
2048 "Select a stack frame without printing anything.\n\
2049 An argument specifies the frame to select.\n\
2050 It can be a stack frame number or the address of the frame.\n");
2052 add_com ("backtrace", class_stack
, backtrace_command
,
2053 "Print backtrace of all stack frames, or innermost COUNT frames.\n\
2054 With a negative argument, print outermost -COUNT frames.\n\
2055 Use of the 'full' qualifier also prints the values of the local variables.\n");
2056 add_com_alias ("bt", "backtrace", class_stack
, 0);
2059 add_com_alias ("t", "backtrace", class_stack
, 0);
2060 add_com ("T", class_stack
, backtrace_full_command
,
2061 "Print backtrace of all stack frames, or innermost COUNT frames \n\
2062 and the values of the local variables.\n\
2063 With a negative argument, print outermost -COUNT frames.\n\
2064 Usage: T <count>\n");
2067 add_com_alias ("where", "backtrace", class_alias
, 0);
2068 add_info ("stack", backtrace_command
,
2069 "Backtrace of the stack, or innermost COUNT frames.");
2070 add_info_alias ("s", "stack", 1);
2071 add_info ("frame", frame_info
,
2072 "All about selected stack frame, or frame at ADDR.");
2073 add_info_alias ("f", "frame", 1);
2074 add_info ("locals", locals_info
,
2075 "Local variables of current stack frame.");
2076 add_info ("args", args_info
,
2077 "Argument variables of current stack frame.");
2079 add_com ("l", class_info
, args_plus_locals_info
,
2080 "Argument and local variables of current stack frame.");
2083 add_com ("func", class_stack
, func_command
,
2084 "Select the stack frame that contains <func>.\nUsage: func <name>\n");
2086 add_info ("catch", catch_info
,
2087 "Exceptions that can be caught in the current stack frame.");
2090 add_cmd ("backtrace-limit", class_stack
, set_backtrace_limit_command
,
2091 "Specify maximum number of frames for \"backtrace\" to print by default.",
2093 add_info ("backtrace-limit", backtrace_limit_info
,
2094 "The maximum number of frames for \"backtrace\" to print by default.");