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 numargs
= FRAME_NUM_ARGS (p
->fi
);
402 print_frame_args (p
->func
, p
->fi
, numargs
, p
->stream
);
406 /* Print information about a frame for frame "fi" at level "level".
407 Used in "where" output, also used to emit breakpoint or step
409 LEVEL is the level of the frame, or -1 if it is the
410 innermost frame but we don't want to print the level.
411 The meaning of the SOURCE argument is:
412 SRC_LINE: Print only source line
413 LOCATION: Print only location
414 LOC_AND_SRC: Print location and source line. */
417 print_frame_info (struct frame_info
*fi
, int level
, int source
, int args
)
419 struct symtab_and_line sal
;
423 if (get_frame_type (fi
) == DUMMY_FRAME
424 || get_frame_type (fi
) == SIGTRAMP_FRAME
)
426 struct cleanup
*uiout_cleanup
427 = make_cleanup_ui_out_tuple_begin_end (uiout
, "frame");
429 annotate_frame_begin (level
== -1 ? 0 : level
, get_frame_pc (fi
));
431 /* Do this regardless of SOURCE because we don't have any source
432 to list for this frame. */
435 ui_out_text (uiout
, "#");
436 ui_out_field_fmt_int (uiout
, 2, ui_left
, "level", level
);
438 if (ui_out_is_mi_like_p (uiout
))
440 annotate_frame_address ();
441 ui_out_field_core_addr (uiout
, "addr", get_frame_pc (fi
));
442 annotate_frame_address_end ();
445 if (get_frame_type (fi
) == DUMMY_FRAME
)
447 annotate_function_call ();
448 ui_out_field_string (uiout
, "func", "<function called from gdb>");
450 else if (get_frame_type (fi
) == SIGTRAMP_FRAME
)
452 annotate_signal_handler_caller ();
453 ui_out_field_string (uiout
, "func", "<signal handler called>");
455 ui_out_text (uiout
, "\n");
456 annotate_frame_end ();
458 do_cleanups (uiout_cleanup
);
462 /* If fi is not the innermost frame, that normally means that fi->pc
463 points to *after* the call instruction, and we want to get the
464 line containing the call, never the next line. But if the next
465 frame is a SIGTRAMP_FRAME or a DUMMY_FRAME, then the next frame
466 was not entered as the result of a call, and we want to get the
467 line containing fi->pc. */
468 find_frame_sal (fi
, &sal
);
470 location_print
= (source
== LOCATION
471 || source
== LOC_AND_ADDRESS
472 || source
== SRC_AND_LOC
);
474 if (location_print
|| !sal
.symtab
)
475 print_frame (fi
, level
, source
, args
, sal
);
477 source_print
= (source
== SRC_LINE
|| source
== SRC_AND_LOC
);
480 set_current_source_symtab_and_line (&sal
);
482 if (source_print
&& sal
.symtab
)
484 struct symtab_and_line cursal
;
486 int mid_statement
= (source
== SRC_LINE
) && (get_frame_pc (fi
) != sal
.pc
);
488 if (annotation_level
)
489 done
= identify_source_line (sal
.symtab
, sal
.line
, mid_statement
,
493 if (print_frame_info_listing_hook
)
494 print_frame_info_listing_hook (sal
.symtab
, sal
.line
, sal
.line
+ 1, 0);
497 /* We used to do this earlier, but that is clearly
498 wrong. This function is used by many different
499 parts of gdb, including normal_stop in infrun.c,
500 which uses this to print out the current PC
501 when we stepi/nexti into the middle of a source
502 line. Only the command line really wants this
503 behavior. Other UIs probably would like the
504 ability to decide for themselves if it is desired. */
505 if (addressprint
&& mid_statement
)
507 ui_out_field_core_addr (uiout
, "addr", get_frame_pc (fi
));
508 ui_out_text (uiout
, "\t");
511 print_source_lines (sal
.symtab
, sal
.line
, sal
.line
+ 1, 0);
514 /* Make sure we have at least a default source file */
515 set_default_source_symtab_and_line ();
516 cursal
= get_current_source_symtab_and_line ();
517 cursal
.line
= max (sal
.line
- get_lines_to_list () / 2, 1);
518 set_current_source_symtab_and_line (&cursal
);
522 set_default_breakpoint (1, get_frame_pc (fi
), sal
.symtab
, sal
.line
);
524 annotate_frame_end ();
526 gdb_flush (gdb_stdout
);
530 print_frame (struct frame_info
*fi
,
534 struct symtab_and_line sal
)
537 register char *funname
= 0;
538 enum language funlang
= language_unknown
;
539 struct ui_stream
*stb
;
540 struct cleanup
*old_chain
;
541 struct cleanup
*list_chain
;
543 stb
= ui_out_stream_new (uiout
);
544 old_chain
= make_cleanup_ui_out_stream_delete (stb
);
546 func
= find_pc_function (frame_address_in_block (fi
));
549 /* In certain pathological cases, the symtabs give the wrong
550 function (when we are in the first function in a file which
551 is compiled without debugging symbols, the previous function
552 is compiled with debugging symbols, and the "foo.o" symbol
553 that is supposed to tell us where the file with debugging symbols
554 ends has been truncated by ar because it is longer than 15
555 characters). This also occurs if the user uses asm() to create
556 a function but not stabs for it (in a file compiled -g).
558 So look in the minimal symbol tables as well, and if it comes
559 up with a larger address for the function use that instead.
560 I don't think this can ever cause any problems; there shouldn't
561 be any minimal symbols in the middle of a function; if this is
562 ever changed many parts of GDB will need to be changed (and we'll
563 create a find_pc_minimal_function or some such). */
565 struct minimal_symbol
*msymbol
= lookup_minimal_symbol_by_pc (frame_address_in_block (fi
));
567 && (SYMBOL_VALUE_ADDRESS (msymbol
)
568 > BLOCK_START (SYMBOL_BLOCK_VALUE (func
))))
571 /* There is no particular reason to think the line number
572 information is wrong. Someone might have just put in
573 a label with asm() but left the line numbers alone. */
574 /* In this case we have no way of knowing the source file
575 and line number, so don't print them. */
578 /* We also don't know anything about the function besides
579 its address and name. */
581 funname
= DEPRECATED_SYMBOL_NAME (msymbol
);
582 funlang
= SYMBOL_LANGUAGE (msymbol
);
586 /* I'd like to use SYMBOL_PRINT_NAME() here, to display the
587 demangled name that we already have stored in the symbol
588 table, but we stored a version with DMGL_PARAMS turned
589 on, and here we don't want to display parameters. So call
590 the demangler again, with DMGL_ANSI only. (Yes, I know
591 that printf_symbol_filtered() will again try to demangle
592 the name on the fly, but the issue is that if
593 cplus_demangle() fails here, it'll fail there too. So we
594 want to catch the failure ("demangled==NULL" case below)
595 here, while we still have our hands on the function
598 funname
= DEPRECATED_SYMBOL_NAME (func
);
599 funlang
= SYMBOL_LANGUAGE (func
);
600 if (funlang
== language_cplus
)
602 demangled
= cplus_demangle (funname
, DMGL_ANSI
);
603 if (demangled
== NULL
)
604 /* If the demangler fails, try the demangled name from
605 the symbol table. This'll have parameters, but
606 that's preferable to diplaying a mangled name. */
607 funname
= SYMBOL_PRINT_NAME (func
);
613 struct minimal_symbol
*msymbol
= lookup_minimal_symbol_by_pc (frame_address_in_block (fi
));
616 funname
= DEPRECATED_SYMBOL_NAME (msymbol
);
617 funlang
= SYMBOL_LANGUAGE (msymbol
);
621 annotate_frame_begin (level
== -1 ? 0 : level
, get_frame_pc (fi
));
623 list_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "frame");
627 ui_out_text (uiout
, "#");
628 ui_out_field_fmt_int (uiout
, 2, ui_left
, "level", level
);
631 if (get_frame_pc (fi
) != sal
.pc
633 || source
== LOC_AND_ADDRESS
)
635 annotate_frame_address ();
636 ui_out_field_core_addr (uiout
, "addr", get_frame_pc (fi
));
637 annotate_frame_address_end ();
638 ui_out_text (uiout
, " in ");
640 annotate_frame_function_name ();
641 fprintf_symbol_filtered (stb
->stream
, funname
? funname
: "??", funlang
,
643 ui_out_field_stream (uiout
, "func", stb
);
644 ui_out_wrap_hint (uiout
, " ");
645 annotate_frame_args ();
647 ui_out_text (uiout
, " (");
650 struct print_args_args args
;
651 struct cleanup
*args_list_chain
;
654 args
.stream
= gdb_stdout
;
655 args_list_chain
= make_cleanup_ui_out_list_begin_end (uiout
, "args");
656 catch_errors (print_args_stub
, &args
, "", RETURN_MASK_ALL
);
657 /* FIXME: args must be a list. If one argument is a string it will
658 have " that will not be properly escaped. */
659 /* Invoke ui_out_tuple_end. */
660 do_cleanups (args_list_chain
);
663 ui_out_text (uiout
, ")");
664 if (sal
.symtab
&& sal
.symtab
->filename
)
666 annotate_frame_source_begin ();
667 ui_out_wrap_hint (uiout
, " ");
668 ui_out_text (uiout
, " at ");
669 annotate_frame_source_file ();
670 ui_out_field_string (uiout
, "file", sal
.symtab
->filename
);
671 annotate_frame_source_file_end ();
672 ui_out_text (uiout
, ":");
673 annotate_frame_source_line ();
674 ui_out_field_int (uiout
, "line", sal
.line
);
675 annotate_frame_source_end ();
679 if (!funname
|| (!sal
.symtab
|| !sal
.symtab
->filename
))
681 char *lib
= PC_SOLIB (get_frame_pc (fi
));
684 annotate_frame_where ();
685 ui_out_wrap_hint (uiout
, " ");
686 ui_out_text (uiout
, " from ");
687 ui_out_field_string (uiout
, "from", lib
);
690 #endif /* PC_SOLIB */
692 /* do_cleanups will call ui_out_tuple_end() for us. */
693 do_cleanups (list_chain
);
694 ui_out_text (uiout
, "\n");
695 do_cleanups (old_chain
);
698 /* Show the frame info. If this is the tui, it will be shown in
699 the source display otherwise, nothing is done */
701 show_stack_frame (struct frame_info
*fi
)
706 /* Read a frame specification in whatever the appropriate format is.
707 Call error() if the specification is in any way invalid (i.e.
708 this function never returns NULL). */
711 parse_frame_specification (char *frame_exp
)
715 CORE_ADDR args
[MAXARGS
];
720 char *addr_string
, *p
;
721 struct cleanup
*tmp_cleanup
;
723 while (*frame_exp
== ' ')
728 if (numargs
> MAXARGS
)
729 error ("Too many args in frame specification");
730 /* Parse an argument. */
731 for (p
= frame_exp
; *p
&& *p
!= ' '; p
++)
733 addr_string
= savestring (frame_exp
, p
- frame_exp
);
738 tmp_cleanup
= make_cleanup (xfree
, addr_string
);
740 /* NOTE: we call parse_and_eval and then both
741 value_as_long and value_as_address rather than calling
742 parse_and_eval_long and parse_and_eval_address because
743 of the issue of potential side effects from evaluating
745 vp
= parse_and_eval (addr_string
);
747 level
= value_as_long (vp
);
749 args
[numargs
++] = value_as_address (vp
);
750 do_cleanups (tmp_cleanup
);
753 /* Skip spaces, move to possible next arg. */
763 if (deprecated_selected_frame
== NULL
)
764 error ("No selected frame.");
765 return deprecated_selected_frame
;
769 struct frame_info
*fid
=
770 find_relative_frame (get_current_frame (), &level
);
771 struct frame_info
*tfid
;
774 /* find_relative_frame was successful */
777 /* If SETUP_ARBITRARY_FRAME is defined, then frame specifications
778 take at least 2 addresses. It is important to detect this case
779 here so that "frame 100" does not give a confusing error message
780 like "frame specification requires two addresses". This of course
781 does not solve the "frame 100" problem for machines on which
782 a frame specification can be made with one address. To solve
783 that, we need a new syntax for a specifying a frame by address.
784 I think the cleanest syntax is $frame(0x45) ($frame(0x23,0x45) for
785 two args, etc.), but people might think that is too much typing,
786 so I guess *0x23,0x45 would be a possible alternative (commas
787 really should be used instead of spaces to delimit; using spaces
788 normally works in an expression). */
789 #ifdef SETUP_ARBITRARY_FRAME
790 error ("No frame %s", paddr_d (args
[0]));
793 /* If (s)he specifies the frame with an address, he deserves what
794 (s)he gets. Still, give the highest one that matches. */
796 for (fid
= get_current_frame ();
797 fid
&& get_frame_base (fid
) != args
[0];
798 fid
= get_prev_frame (fid
))
802 while ((tfid
= get_prev_frame (fid
)) &&
803 (get_frame_base (tfid
) == args
[0]))
806 /* We couldn't identify the frame as an existing frame, but
807 perhaps we can create one with a single argument. */
811 #ifdef SETUP_ARBITRARY_FRAME
812 return SETUP_ARBITRARY_FRAME (numargs
, args
);
814 /* Usual case. Do it here rather than have everyone supply
815 a SETUP_ARBITRARY_FRAME that does this. */
817 return create_new_frame (args
[0], 0);
818 error ("Too many args in frame specification");
825 /* Print verbosely the selected frame or the frame at address ADDR.
826 This means absolutely all information in the frame is printed. */
829 frame_info (char *addr_exp
, int from_tty
)
831 struct frame_info
*fi
;
832 struct symtab_and_line sal
;
835 struct frame_info
*calling_frame_info
;
836 int i
, count
, numregs
;
838 enum language funlang
= language_unknown
;
839 const char *pc_regname
;
841 if (!target_has_stack
)
844 /* Name of the value returned by get_frame_pc(). Per comments, "pc"
845 is not a good name. */
847 /* OK, this is weird. The PC_REGNUM hardware register's value can
848 easily not match that of the internal value returned by
850 pc_regname
= REGISTER_NAME (PC_REGNUM
);
852 /* But then, this is weird to. Even without PC_REGNUM, an
853 architectures will often have a hardware register called "pc",
854 and that register's value, again, can easily not match
858 fi
= parse_frame_specification (addr_exp
);
860 error ("Invalid frame specified.");
862 find_frame_sal (fi
, &sal
);
863 func
= get_frame_function (fi
);
864 /* FIXME: cagney/2002-11-28: Why bother? Won't sal.symtab contain
866 s
= find_pc_symtab (get_frame_pc (fi
));
869 /* I'd like to use SYMBOL_PRINT_NAME() here, to display
870 * the demangled name that we already have stored in
871 * the symbol table, but we stored a version with
872 * DMGL_PARAMS turned on, and here we don't want
873 * to display parameters. So call the demangler again,
874 * with DMGL_ANSI only. RT
875 * (Yes, I know that printf_symbol_filtered() will
876 * again try to demangle the name on the fly, but
877 * the issue is that if cplus_demangle() fails here,
878 * it'll fail there too. So we want to catch the failure
879 * ("demangled==NULL" case below) here, while we still
880 * have our hands on the function symbol.)
883 funname
= DEPRECATED_SYMBOL_NAME (func
);
884 funlang
= SYMBOL_LANGUAGE (func
);
885 if (funlang
== language_cplus
)
887 demangled
= cplus_demangle (funname
, DMGL_ANSI
);
888 /* If the demangler fails, try the demangled name
889 * from the symbol table. This'll have parameters,
890 * but that's preferable to diplaying a mangled name.
892 if (demangled
== NULL
)
893 funname
= SYMBOL_PRINT_NAME (func
);
898 register struct minimal_symbol
*msymbol
= lookup_minimal_symbol_by_pc (get_frame_pc (fi
));
901 funname
= DEPRECATED_SYMBOL_NAME (msymbol
);
902 funlang
= SYMBOL_LANGUAGE (msymbol
);
905 calling_frame_info
= get_prev_frame (fi
);
907 if (!addr_exp
&& frame_relative_level (deprecated_selected_frame
) >= 0)
909 printf_filtered ("Stack level %d, frame at ",
910 frame_relative_level (deprecated_selected_frame
));
911 print_address_numeric (get_frame_base (fi
), 1, gdb_stdout
);
912 printf_filtered (":\n");
916 printf_filtered ("Stack frame at ");
917 print_address_numeric (get_frame_base (fi
), 1, gdb_stdout
);
918 printf_filtered (":\n");
920 printf_filtered (" %s = ", pc_regname
);
921 print_address_numeric (get_frame_pc (fi
), 1, gdb_stdout
);
926 printf_filtered (" in ");
927 fprintf_symbol_filtered (gdb_stdout
, funname
, funlang
,
928 DMGL_ANSI
| DMGL_PARAMS
);
932 printf_filtered (" (%s:%d)", sal
.symtab
->filename
, sal
.line
);
933 puts_filtered ("; ");
935 printf_filtered ("saved %s ", pc_regname
);
936 print_address_numeric (frame_pc_unwind (fi
), 1, gdb_stdout
);
937 printf_filtered ("\n");
941 frameless
= FRAMELESS_FUNCTION_INVOCATION (fi
);
943 printf_filtered (" (FRAMELESS),");
946 if (calling_frame_info
)
948 printf_filtered (" called by frame at ");
949 print_address_numeric (get_frame_base (calling_frame_info
),
952 if (get_next_frame (fi
) && calling_frame_info
)
955 if (get_next_frame (fi
))
957 printf_filtered (" caller of frame at ");
958 print_address_numeric (get_frame_base (get_next_frame (fi
)), 1,
961 if (get_next_frame (fi
) || calling_frame_info
)
962 puts_filtered ("\n");
964 printf_filtered (" source language %s.\n",
965 language_str (s
->language
));
967 #ifdef PRINT_EXTRA_FRAME_INFO
968 PRINT_EXTRA_FRAME_INFO (fi
);
972 /* Address of the argument list for this frame, or 0. */
973 CORE_ADDR arg_list
= get_frame_args_address (fi
);
974 /* Number of args for this frame, or -1 if unknown. */
978 printf_filtered (" Arglist at unknown address.\n");
981 printf_filtered (" Arglist at ");
982 print_address_numeric (arg_list
, 1, gdb_stdout
);
983 printf_filtered (",");
985 numargs
= FRAME_NUM_ARGS (fi
);
987 puts_filtered (" args: ");
988 else if (numargs
== 0)
989 puts_filtered (" no args.");
990 else if (numargs
== 1)
991 puts_filtered (" 1 arg: ");
993 printf_filtered (" %d args: ", numargs
);
994 print_frame_args (func
, fi
, numargs
, gdb_stdout
);
995 puts_filtered ("\n");
999 /* Address of the local variables for this frame, or 0. */
1000 CORE_ADDR arg_list
= get_frame_locals_address (fi
);
1003 printf_filtered (" Locals at unknown address,");
1006 printf_filtered (" Locals at ");
1007 print_address_numeric (arg_list
, 1, gdb_stdout
);
1008 printf_filtered (",");
1012 if (DEPRECATED_FRAME_INIT_SAVED_REGS_P ()
1013 && get_frame_saved_regs (fi
) == NULL
)
1014 DEPRECATED_FRAME_INIT_SAVED_REGS (fi
);
1015 /* Print as much information as possible on the location of all the
1018 enum lval_type lval
;
1026 /* The sp is special; what's displayed isn't the save address, but
1027 the value of the previous frame's sp. This is a legacy thing,
1028 at one stage the frame cached the previous frame's SP instead
1029 of its address, hence it was easiest to just display the cached
1033 /* Find out the location of the saved stack pointer with out
1034 actually evaluating it. */
1035 frame_register_unwind (fi
, SP_REGNUM
, &optimized
, &lval
, &addr
,
1037 if (!optimized
&& lval
== not_lval
)
1039 char value
[MAX_REGISTER_SIZE
];
1041 frame_register_unwind (fi
, SP_REGNUM
, &optimized
, &lval
, &addr
,
1043 /* NOTE: cagney/2003-05-22: This is assuming that the
1044 stack pointer was packed as an unsigned integer. That
1045 may or may not be valid. */
1046 sp
= extract_unsigned_integer (value
, REGISTER_RAW_SIZE (SP_REGNUM
));
1047 printf_filtered (" Previous frame's sp is ");
1048 print_address_numeric (sp
, 1, gdb_stdout
);
1049 printf_filtered ("\n");
1052 else if (!optimized
&& lval
== lval_memory
)
1054 printf_filtered (" Previous frame's sp at ");
1055 print_address_numeric (addr
, 1, gdb_stdout
);
1056 printf_filtered ("\n");
1059 else if (!optimized
&& lval
== lval_register
)
1061 printf_filtered (" Previous frame's sp in %s\n",
1062 REGISTER_NAME (realnum
));
1065 /* else keep quiet. */
1069 numregs
= NUM_REGS
+ NUM_PSEUDO_REGS
;
1070 for (i
= 0; i
< numregs
; i
++)
1073 /* Find out the location of the saved register without
1074 fetching the corresponding value. */
1075 frame_register_unwind (fi
, i
, &optimized
, &lval
, &addr
, &realnum
,
1077 /* For moment, only display registers that were saved on the
1079 if (!optimized
&& lval
== lval_memory
)
1082 puts_filtered (" Saved registers:\n ");
1084 puts_filtered (",");
1086 printf_filtered (" %s at ", REGISTER_NAME (i
));
1087 print_address_numeric (addr
, 1, gdb_stdout
);
1091 if (count
|| need_nl
)
1092 puts_filtered ("\n");
1097 /* Set a limit on the number of frames printed by default in a
1100 static int backtrace_limit
;
1103 set_backtrace_limit_command (char *count_exp
, int from_tty
)
1105 int count
= parse_and_eval_long (count_exp
);
1108 error ("Negative argument not meaningful as backtrace limit.");
1110 backtrace_limit
= count
;
1114 backtrace_limit_info (char *arg
, int from_tty
)
1117 error ("\"Info backtrace-limit\" takes no arguments.");
1119 printf_unfiltered ("Backtrace limit: %d.\n", backtrace_limit
);
1123 /* Print briefly all stack frames or just the innermost COUNT frames. */
1125 static void backtrace_command_1 (char *count_exp
, int show_locals
,
1128 backtrace_command_1 (char *count_exp
, int show_locals
, int from_tty
)
1130 struct frame_info
*fi
;
1133 register struct frame_info
*trailing
;
1134 register int trailing_level
;
1136 if (!target_has_stack
)
1137 error ("No stack.");
1139 /* The following code must do two things. First, it must
1140 set the variable TRAILING to the frame from which we should start
1141 printing. Second, it must set the variable count to the number
1142 of frames which we should print, or -1 if all of them. */
1143 trailing
= get_current_frame ();
1145 /* The target can be in a state where there is no valid frames
1146 (e.g., just connected). */
1147 if (trailing
== NULL
)
1148 error ("No stack.");
1153 count
= parse_and_eval_long (count_exp
);
1156 struct frame_info
*current
;
1161 while (current
&& count
--)
1164 current
= get_prev_frame (current
);
1167 /* Will stop when CURRENT reaches the top of the stack. TRAILING
1168 will be COUNT below it. */
1172 trailing
= get_prev_frame (trailing
);
1173 current
= get_prev_frame (current
);
1185 struct partial_symtab
*ps
;
1187 /* Read in symbols for all of the frames. Need to do this in
1188 a separate pass so that "Reading in symbols for xxx" messages
1189 don't screw up the appearance of the backtrace. Also
1190 if people have strong opinions against reading symbols for
1191 backtrace this may have to be an option. */
1195 fi
= get_prev_frame (fi
))
1198 ps
= find_pc_psymtab (frame_address_in_block (fi
));
1200 PSYMTAB_TO_SYMTAB (ps
); /* Force syms to come in */
1204 for (i
= 0, fi
= trailing
;
1206 i
++, fi
= get_prev_frame (fi
))
1210 /* Don't use print_stack_frame; if an error() occurs it probably
1211 means further attempts to backtrace would fail (on the other
1212 hand, perhaps the code does or could be fixed to make sure
1213 the frame->prev field gets set to NULL in that case). */
1214 print_frame_info (fi
, trailing_level
+ i
, 0, 1);
1216 print_frame_local_vars (fi
, 1, gdb_stdout
);
1219 /* If we've stopped before the end, mention that. */
1221 printf_filtered ("(More stack frames follow...)\n");
1225 backtrace_command (char *arg
, int from_tty
)
1227 struct cleanup
*old_chain
= (struct cleanup
*) NULL
;
1228 char **argv
= (char **) NULL
;
1229 int argIndicatingFullTrace
= (-1), totArgLen
= 0, argc
= 0;
1232 if (arg
!= (char *) NULL
)
1236 argv
= buildargv (arg
);
1237 old_chain
= make_cleanup_freeargv (argv
);
1239 for (i
= 0; (argv
[i
] != (char *) NULL
); i
++)
1243 for (j
= 0; (j
< strlen (argv
[i
])); j
++)
1244 argv
[i
][j
] = tolower (argv
[i
][j
]);
1246 if (argIndicatingFullTrace
< 0 && subset_compare (argv
[i
], "full"))
1247 argIndicatingFullTrace
= argc
;
1251 totArgLen
+= strlen (argv
[i
]);
1255 if (argIndicatingFullTrace
>= 0)
1259 argPtr
= (char *) xmalloc (totArgLen
+ 1);
1264 memset (argPtr
, 0, totArgLen
+ 1);
1265 for (i
= 0; (i
< (argc
+ 1)); i
++)
1267 if (i
!= argIndicatingFullTrace
)
1269 strcat (argPtr
, argv
[i
]);
1270 strcat (argPtr
, " ");
1276 argPtr
= (char *) NULL
;
1280 backtrace_command_1 (argPtr
, (argIndicatingFullTrace
>= 0), from_tty
);
1282 if (argIndicatingFullTrace
>= 0 && totArgLen
> 0)
1286 do_cleanups (old_chain
);
1289 static void backtrace_full_command (char *arg
, int from_tty
);
1291 backtrace_full_command (char *arg
, int from_tty
)
1293 backtrace_command_1 (arg
, 1, from_tty
);
1297 /* Print the local variables of a block B active in FRAME.
1298 Return 1 if any variables were printed; 0 otherwise. */
1301 print_block_frame_locals (struct block
*b
, register struct frame_info
*fi
,
1302 int num_tabs
, register struct ui_file
*stream
)
1305 register struct symbol
*sym
;
1306 register int values_printed
= 0;
1308 ALL_BLOCK_SYMBOLS (b
, i
, sym
)
1310 switch (SYMBOL_CLASS (sym
))
1318 for (j
= 0; j
< num_tabs
; j
++)
1319 fputs_filtered ("\t", stream
);
1320 fputs_filtered (SYMBOL_PRINT_NAME (sym
), stream
);
1321 fputs_filtered (" = ", stream
);
1322 print_variable_value (sym
, fi
, stream
);
1323 fprintf_filtered (stream
, "\n");
1327 /* Ignore symbols which are not locals. */
1331 return values_printed
;
1334 /* Same, but print labels. */
1337 print_block_frame_labels (struct block
*b
, int *have_default
,
1338 register struct ui_file
*stream
)
1341 register struct symbol
*sym
;
1342 register int values_printed
= 0;
1344 ALL_BLOCK_SYMBOLS (b
, i
, sym
)
1346 if (STREQ (DEPRECATED_SYMBOL_NAME (sym
), "default"))
1352 if (SYMBOL_CLASS (sym
) == LOC_LABEL
)
1354 struct symtab_and_line sal
;
1355 sal
= find_pc_line (SYMBOL_VALUE_ADDRESS (sym
), 0);
1357 fputs_filtered (SYMBOL_PRINT_NAME (sym
), stream
);
1360 fprintf_filtered (stream
, " ");
1361 print_address_numeric (SYMBOL_VALUE_ADDRESS (sym
), 1, stream
);
1363 fprintf_filtered (stream
, " in file %s, line %d\n",
1364 sal
.symtab
->filename
, sal
.line
);
1367 return values_printed
;
1370 /* Print on STREAM all the local variables in frame FRAME,
1371 including all the blocks active in that frame
1374 Returns 1 if the job was done,
1375 or 0 if nothing was printed because we have no info
1376 on the function running in FRAME. */
1379 print_frame_local_vars (register struct frame_info
*fi
, register int num_tabs
,
1380 register struct ui_file
*stream
)
1382 register struct block
*block
= get_frame_block (fi
, 0);
1383 register int values_printed
= 0;
1387 fprintf_filtered (stream
, "No symbol table info available.\n");
1393 if (print_block_frame_locals (block
, fi
, num_tabs
, stream
))
1395 /* After handling the function's top-level block, stop.
1396 Don't continue to its superblock, the block of
1397 per-file symbols. */
1398 if (BLOCK_FUNCTION (block
))
1400 block
= BLOCK_SUPERBLOCK (block
);
1403 if (!values_printed
)
1405 fprintf_filtered (stream
, "No locals.\n");
1409 /* Same, but print labels. */
1412 print_frame_label_vars (register struct frame_info
*fi
, int this_level_only
,
1413 register struct ui_file
*stream
)
1415 register struct blockvector
*bl
;
1416 register struct block
*block
= get_frame_block (fi
, 0);
1417 register int values_printed
= 0;
1418 int index
, have_default
= 0;
1419 char *blocks_printed
;
1420 CORE_ADDR pc
= get_frame_pc (fi
);
1424 fprintf_filtered (stream
, "No symbol table info available.\n");
1428 bl
= blockvector_for_pc (BLOCK_END (block
) - 4, &index
);
1429 blocks_printed
= (char *) alloca (BLOCKVECTOR_NBLOCKS (bl
) * sizeof (char));
1430 memset (blocks_printed
, 0, BLOCKVECTOR_NBLOCKS (bl
) * sizeof (char));
1434 CORE_ADDR end
= BLOCK_END (block
) - 4;
1437 if (bl
!= blockvector_for_pc (end
, &index
))
1438 error ("blockvector blotch");
1439 if (BLOCKVECTOR_BLOCK (bl
, index
) != block
)
1440 error ("blockvector botch");
1441 last_index
= BLOCKVECTOR_NBLOCKS (bl
);
1444 /* Don't print out blocks that have gone by. */
1445 while (index
< last_index
1446 && BLOCK_END (BLOCKVECTOR_BLOCK (bl
, index
)) < pc
)
1449 while (index
< last_index
1450 && BLOCK_END (BLOCKVECTOR_BLOCK (bl
, index
)) < end
)
1452 if (blocks_printed
[index
] == 0)
1454 if (print_block_frame_labels (BLOCKVECTOR_BLOCK (bl
, index
), &have_default
, stream
))
1456 blocks_printed
[index
] = 1;
1462 if (values_printed
&& this_level_only
)
1465 /* After handling the function's top-level block, stop.
1466 Don't continue to its superblock, the block of
1467 per-file symbols. */
1468 if (BLOCK_FUNCTION (block
))
1470 block
= BLOCK_SUPERBLOCK (block
);
1473 if (!values_printed
&& !this_level_only
)
1475 fprintf_filtered (stream
, "No catches.\n");
1481 locals_info (char *args
, int from_tty
)
1483 if (!deprecated_selected_frame
)
1484 error ("No frame selected.");
1485 print_frame_local_vars (deprecated_selected_frame
, 0, gdb_stdout
);
1489 catch_info (char *ignore
, int from_tty
)
1491 struct symtab_and_line
*sal
;
1493 /* Check for target support for exception handling */
1494 sal
= target_enable_exception_callback (EX_EVENT_CATCH
, 1);
1497 /* Currently not handling this */
1498 /* Ideally, here we should interact with the C++ runtime
1499 system to find the list of active handlers, etc. */
1500 fprintf_filtered (gdb_stdout
, "Info catch not supported with this target/compiler combination.\n");
1502 if (!deprecated_selected_frame
)
1503 error ("No frame selected.");
1508 /* Assume g++ compiled code -- old v 4.16 behaviour */
1509 if (!deprecated_selected_frame
)
1510 error ("No frame selected.");
1512 print_frame_label_vars (deprecated_selected_frame
, 0, gdb_stdout
);
1517 print_frame_arg_vars (register struct frame_info
*fi
,
1518 register struct ui_file
*stream
)
1520 struct symbol
*func
= get_frame_function (fi
);
1521 register struct block
*b
;
1523 register struct symbol
*sym
, *sym2
;
1524 register int values_printed
= 0;
1528 fprintf_filtered (stream
, "No symbol table info available.\n");
1532 b
= SYMBOL_BLOCK_VALUE (func
);
1533 ALL_BLOCK_SYMBOLS (b
, i
, sym
)
1535 switch (SYMBOL_CLASS (sym
))
1541 case LOC_REGPARM_ADDR
:
1542 case LOC_BASEREG_ARG
:
1543 case LOC_COMPUTED_ARG
:
1545 fputs_filtered (SYMBOL_PRINT_NAME (sym
), stream
);
1546 fputs_filtered (" = ", stream
);
1548 /* We have to look up the symbol because arguments can have
1549 two entries (one a parameter, one a local) and the one we
1550 want is the local, which lookup_symbol will find for us.
1551 This includes gcc1 (not gcc2) on the sparc when passing a
1552 small structure and gcc2 when the argument type is float
1553 and it is passed as a double and converted to float by
1554 the prologue (in the latter case the type of the LOC_ARG
1555 symbol is double and the type of the LOC_LOCAL symbol is
1556 float). There are also LOC_ARG/LOC_REGISTER pairs which
1557 are not combined in symbol-reading. */
1559 sym2
= lookup_symbol (DEPRECATED_SYMBOL_NAME (sym
),
1560 b
, VAR_DOMAIN
, (int *) NULL
, (struct symtab
**) NULL
);
1561 print_variable_value (sym2
, fi
, stream
);
1562 fprintf_filtered (stream
, "\n");
1566 /* Don't worry about things which aren't arguments. */
1570 if (!values_printed
)
1572 fprintf_filtered (stream
, "No arguments.\n");
1577 args_info (char *ignore
, int from_tty
)
1579 if (!deprecated_selected_frame
)
1580 error ("No frame selected.");
1581 print_frame_arg_vars (deprecated_selected_frame
, gdb_stdout
);
1586 args_plus_locals_info (char *ignore
, int from_tty
)
1588 args_info (ignore
, from_tty
);
1589 locals_info (ignore
, from_tty
);
1593 /* Select frame FI. Also print the stack frame and show the source if
1594 this is the tui version. */
1596 select_and_print_frame (struct frame_info
*fi
)
1601 print_stack_frame (fi
, frame_relative_level (fi
), 1);
1605 /* Return the symbol-block in which the selected frame is executing.
1606 Can return zero under various legitimate circumstances.
1608 If ADDR_IN_BLOCK is non-zero, set *ADDR_IN_BLOCK to the relevant
1609 code address within the block returned. We use this to decide
1610 which macros are in scope. */
1613 get_selected_block (CORE_ADDR
*addr_in_block
)
1615 if (!target_has_stack
)
1618 /* NOTE: cagney/2002-11-28: Why go to all this effort to not create
1619 a selected/current frame? Perhaphs this function is called,
1620 indirectly, by WFI in "infrun.c" where avoiding the creation of
1621 an inner most frame is very important (it slows down single
1622 step). I suspect, though that this was true in the deep dark
1623 past but is no longer the case. A mindless look at all the
1624 callers tends to support this theory. I think we should be able
1625 to assume that there is always a selcted frame. */
1626 /* gdb_assert (deprecated_selected_frame != NULL); So, do you feel
1628 if (!deprecated_selected_frame
)
1630 CORE_ADDR pc
= read_pc ();
1631 if (addr_in_block
!= NULL
)
1632 *addr_in_block
= pc
;
1633 return block_for_pc (pc
);
1635 return get_frame_block (deprecated_selected_frame
, addr_in_block
);
1638 /* Find a frame a certain number of levels away from FRAME.
1639 LEVEL_OFFSET_PTR points to an int containing the number of levels.
1640 Positive means go to earlier frames (up); negative, the reverse.
1641 The int that contains the number of levels is counted toward
1642 zero as the frames for those levels are found.
1643 If the top or bottom frame is reached, that frame is returned,
1644 but the final value of *LEVEL_OFFSET_PTR is nonzero and indicates
1645 how much farther the original request asked to go. */
1648 find_relative_frame (register struct frame_info
*frame
,
1649 register int *level_offset_ptr
)
1651 register struct frame_info
*prev
;
1652 register struct frame_info
*frame1
;
1654 /* Going up is simple: just do get_prev_frame enough times
1655 or until initial frame is reached. */
1656 while (*level_offset_ptr
> 0)
1658 prev
= get_prev_frame (frame
);
1661 (*level_offset_ptr
)--;
1664 /* Going down is just as simple. */
1665 if (*level_offset_ptr
< 0)
1667 while (*level_offset_ptr
< 0)
1669 frame1
= get_next_frame (frame
);
1673 (*level_offset_ptr
)++;
1679 /* The "select_frame" command. With no arg, NOP.
1680 With arg LEVEL_EXP, select the frame at level LEVEL if it is a
1681 valid level. Otherwise, treat level_exp as an address expression
1682 and select it. See parse_frame_specification for more info on proper
1683 frame expressions. */
1686 select_frame_command (char *level_exp
, int from_tty
)
1688 struct frame_info
*frame
;
1689 int level
= frame_relative_level (deprecated_selected_frame
);
1691 if (!target_has_stack
)
1692 error ("No stack.");
1694 frame
= parse_frame_specification (level_exp
);
1696 select_frame (frame
);
1697 if (level
!= frame_relative_level (deprecated_selected_frame
))
1698 selected_frame_level_changed_event (frame_relative_level (deprecated_selected_frame
));
1701 /* The "frame" command. With no arg, print selected frame briefly.
1702 With arg, behaves like select_frame and then prints the selected
1706 frame_command (char *level_exp
, int from_tty
)
1708 select_frame_command (level_exp
, from_tty
);
1709 print_stack_frame (deprecated_selected_frame
,
1710 frame_relative_level (deprecated_selected_frame
), 1);
1713 /* The XDB Compatibility command to print the current frame. */
1716 current_frame_command (char *level_exp
, int from_tty
)
1718 if (target_has_stack
== 0 || deprecated_selected_frame
== 0)
1719 error ("No stack.");
1720 print_stack_frame (deprecated_selected_frame
,
1721 frame_relative_level (deprecated_selected_frame
), 1);
1724 /* Select the frame up one or COUNT stack levels
1725 from the previously selected frame, and print it briefly. */
1729 up_silently_base (char *count_exp
)
1731 register struct frame_info
*fi
;
1732 int count
= 1, count1
;
1734 count
= parse_and_eval_long (count_exp
);
1737 if (target_has_stack
== 0 || deprecated_selected_frame
== 0)
1738 error ("No stack.");
1740 fi
= find_relative_frame (deprecated_selected_frame
, &count1
);
1741 if (count1
!= 0 && count_exp
== 0)
1742 error ("Initial frame selected; you cannot go up.");
1744 selected_frame_level_changed_event (frame_relative_level (deprecated_selected_frame
));
1748 up_silently_command (char *count_exp
, int from_tty
)
1750 up_silently_base (count_exp
);
1754 up_command (char *count_exp
, int from_tty
)
1756 up_silently_base (count_exp
);
1757 print_stack_frame (deprecated_selected_frame
,
1758 frame_relative_level (deprecated_selected_frame
), 1);
1761 /* Select the frame down one or COUNT stack levels
1762 from the previously selected frame, and print it briefly. */
1766 down_silently_base (char *count_exp
)
1768 register struct frame_info
*frame
;
1769 int count
= -1, count1
;
1771 count
= -parse_and_eval_long (count_exp
);
1774 if (target_has_stack
== 0 || deprecated_selected_frame
== 0)
1775 error ("No stack.");
1777 frame
= find_relative_frame (deprecated_selected_frame
, &count1
);
1778 if (count1
!= 0 && count_exp
== 0)
1781 /* We only do this if count_exp is not specified. That way "down"
1782 means to really go down (and let me know if that is
1783 impossible), but "down 9999" can be used to mean go all the way
1784 down without getting an error. */
1786 error ("Bottom (i.e., innermost) frame selected; you cannot go down.");
1789 select_frame (frame
);
1790 selected_frame_level_changed_event (frame_relative_level (deprecated_selected_frame
));
1795 down_silently_command (char *count_exp
, int from_tty
)
1797 down_silently_base (count_exp
);
1801 down_command (char *count_exp
, int from_tty
)
1803 down_silently_base (count_exp
);
1804 print_stack_frame (deprecated_selected_frame
,
1805 frame_relative_level (deprecated_selected_frame
), 1);
1809 return_command (char *retval_exp
, int from_tty
)
1811 struct symbol
*thisfun
;
1812 CORE_ADDR selected_frame_addr
;
1813 CORE_ADDR selected_frame_pc
;
1814 struct frame_info
*frame
;
1815 struct value
*return_value
= NULL
;
1817 if (deprecated_selected_frame
== NULL
)
1818 error ("No selected frame.");
1819 thisfun
= get_frame_function (deprecated_selected_frame
);
1820 selected_frame_addr
= get_frame_base (deprecated_selected_frame
);
1821 selected_frame_pc
= get_frame_pc (deprecated_selected_frame
);
1823 /* Compute the return value (if any -- possibly getting errors here). */
1827 struct type
*return_type
= NULL
;
1829 return_value
= parse_and_eval (retval_exp
);
1831 /* Cast return value to the return type of the function. */
1832 if (thisfun
!= NULL
)
1833 return_type
= TYPE_TARGET_TYPE (SYMBOL_TYPE (thisfun
));
1834 if (return_type
== NULL
)
1835 return_type
= builtin_type_int
;
1836 return_value
= value_cast (return_type
, return_value
);
1838 /* Make sure we have fully evaluated it, since
1839 it might live in the stack frame we're about to pop. */
1840 if (VALUE_LAZY (return_value
))
1841 value_fetch_lazy (return_value
);
1844 /* If interactive, require confirmation. */
1850 if (!query ("Make %s return now? ", SYMBOL_PRINT_NAME (thisfun
)))
1852 error ("Not confirmed.");
1856 else if (!query ("Make selected stack frame return now? "))
1857 error ("Not confirmed.");
1860 /* FIXME: cagney/2003-01-18: Rather than pop each frame in turn,
1861 this code should just go straight to the relevant frame and pop
1864 /* Do the real work. Pop until the specified frame is current. We
1865 use this method because the deprecated_selected_frame is not
1866 valid after a frame_pop(). The pc comparison makes this work
1867 even if the selected frame shares its fp with another frame. */
1869 /* FIXME: cagney/32003-03-12: This code should use frame_id_eq().
1870 Unfortunatly, that function doesn't yet include the PC in any
1871 frame ID comparison. */
1873 while (selected_frame_addr
!= get_frame_base (frame
= get_current_frame ())
1874 || selected_frame_pc
!= get_frame_pc (frame
))
1875 frame_pop (get_current_frame ());
1877 /* Then pop that frame. */
1879 frame_pop (get_current_frame ());
1881 /* Compute the return value (if any) and store in the place
1882 for return values. */
1885 set_return_value (return_value
);
1887 /* If we are at the end of a call dummy now, pop the dummy frame too. */
1889 /* FIXME: cagney/2003-01-18: This is silly. Instead of popping all
1890 the frames except the dummy, and then, as an afterthought,
1891 popping the dummy frame, this code should just pop through to the
1894 if (CALL_DUMMY_HAS_COMPLETED (read_pc(), read_sp (),
1895 get_frame_base (get_current_frame ())))
1896 frame_pop (get_current_frame ());
1898 /* If interactive, print the frame that is now current. */
1901 frame_command ("0", 1);
1903 select_frame_command ("0", 0);
1906 /* Sets the scope to input function name, provided that the
1907 function is within the current stack frame */
1909 struct function_bounds
1911 CORE_ADDR low
, high
;
1914 static void func_command (char *arg
, int from_tty
);
1916 func_command (char *arg
, int from_tty
)
1918 struct frame_info
*fp
;
1920 struct symtabs_and_lines sals
;
1923 struct function_bounds
*func_bounds
= (struct function_bounds
*) NULL
;
1925 if (arg
!= (char *) NULL
)
1928 fp
= parse_frame_specification ("0");
1929 sals
= decode_line_spec (arg
, 1);
1930 func_bounds
= (struct function_bounds
*) xmalloc (
1931 sizeof (struct function_bounds
) * sals
.nelts
);
1932 for (i
= 0; (i
< sals
.nelts
&& !found
); i
++)
1934 if (sals
.sals
[i
].pc
== (CORE_ADDR
) 0 ||
1935 find_pc_partial_function (sals
.sals
[i
].pc
,
1937 &func_bounds
[i
].low
,
1938 &func_bounds
[i
].high
) == 0)
1940 func_bounds
[i
].low
=
1941 func_bounds
[i
].high
= (CORE_ADDR
) NULL
;
1947 for (i
= 0; (i
< sals
.nelts
&& !found
); i
++)
1948 found
= (get_frame_pc (fp
) >= func_bounds
[i
].low
&&
1949 get_frame_pc (fp
) < func_bounds
[i
].high
);
1953 fp
= find_relative_frame (fp
, &level
);
1956 while (!found
&& level
== 0);
1959 xfree (func_bounds
);
1962 printf_filtered ("'%s' not within current stack frame.\n", arg
);
1963 else if (fp
!= deprecated_selected_frame
)
1964 select_and_print_frame (fp
);
1967 /* Gets the language of the current frame. */
1970 get_frame_language (void)
1972 register struct symtab
*s
;
1973 enum language flang
; /* The language of the current frame */
1975 if (deprecated_selected_frame
)
1977 s
= find_pc_symtab (get_frame_pc (deprecated_selected_frame
));
1979 flang
= s
->language
;
1981 flang
= language_unknown
;
1984 flang
= language_unknown
;
1990 _initialize_stack (void)
1993 backtrace_limit
= 30;
1996 add_com ("return", class_stack
, return_command
,
1997 "Make selected stack frame return to its caller.\n\
1998 Control remains in the debugger, but when you continue\n\
1999 execution will resume in the frame above the one now selected.\n\
2000 If an argument is given, it is an expression for the value to return.");
2002 add_com ("up", class_stack
, up_command
,
2003 "Select and print stack frame that called this one.\n\
2004 An argument says how many frames up to go.");
2005 add_com ("up-silently", class_support
, up_silently_command
,
2006 "Same as the `up' command, but does not print anything.\n\
2007 This is useful in command scripts.");
2009 add_com ("down", class_stack
, down_command
,
2010 "Select and print stack frame called by this one.\n\
2011 An argument says how many frames down to go.");
2012 add_com_alias ("do", "down", class_stack
, 1);
2013 add_com_alias ("dow", "down", class_stack
, 1);
2014 add_com ("down-silently", class_support
, down_silently_command
,
2015 "Same as the `down' command, but does not print anything.\n\
2016 This is useful in command scripts.");
2018 add_com ("frame", class_stack
, frame_command
,
2019 "Select and print a stack frame.\n\
2020 With no argument, print the selected stack frame. (See also \"info frame\").\n\
2021 An argument specifies the frame to select.\n\
2022 It can be a stack frame number or the address of the frame.\n\
2023 With argument, nothing is printed if input is coming from\n\
2024 a command file or a user-defined command.");
2026 add_com_alias ("f", "frame", class_stack
, 1);
2030 add_com ("L", class_stack
, current_frame_command
,
2031 "Print the current stack frame.\n");
2032 add_com_alias ("V", "frame", class_stack
, 1);
2034 add_com ("select-frame", class_stack
, select_frame_command
,
2035 "Select a stack frame without printing anything.\n\
2036 An argument specifies the frame to select.\n\
2037 It can be a stack frame number or the address of the frame.\n");
2039 add_com ("backtrace", class_stack
, backtrace_command
,
2040 "Print backtrace of all stack frames, or innermost COUNT frames.\n\
2041 With a negative argument, print outermost -COUNT frames.\n\
2042 Use of the 'full' qualifier also prints the values of the local variables.\n");
2043 add_com_alias ("bt", "backtrace", class_stack
, 0);
2046 add_com_alias ("t", "backtrace", class_stack
, 0);
2047 add_com ("T", class_stack
, backtrace_full_command
,
2048 "Print backtrace of all stack frames, or innermost COUNT frames \n\
2049 and the values of the local variables.\n\
2050 With a negative argument, print outermost -COUNT frames.\n\
2051 Usage: T <count>\n");
2054 add_com_alias ("where", "backtrace", class_alias
, 0);
2055 add_info ("stack", backtrace_command
,
2056 "Backtrace of the stack, or innermost COUNT frames.");
2057 add_info_alias ("s", "stack", 1);
2058 add_info ("frame", frame_info
,
2059 "All about selected stack frame, or frame at ADDR.");
2060 add_info_alias ("f", "frame", 1);
2061 add_info ("locals", locals_info
,
2062 "Local variables of current stack frame.");
2063 add_info ("args", args_info
,
2064 "Argument variables of current stack frame.");
2066 add_com ("l", class_info
, args_plus_locals_info
,
2067 "Argument and local variables of current stack frame.");
2070 add_com ("func", class_stack
, func_command
,
2071 "Select the stack frame that contains <func>.\nUsage: func <name>\n");
2073 add_info ("catch", catch_info
,
2074 "Exceptions that can be caught in the current stack frame.");
2077 add_cmd ("backtrace-limit", class_stack
, set_backtrace_limit_command
,
2078 "Specify maximum number of frames for \"backtrace\" to print by default.",
2080 add_info ("backtrace-limit", backtrace_limit_info
,
2081 "The maximum number of frames for \"backtrace\" to print by default.");