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, 2004, 2005
5 Free Software Foundation, Inc.
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"
45 #include "dictionary.h"
46 #include "exceptions.h"
47 #include "reggroups.h"
51 /* Prototypes for exported functions. */
53 void args_info (char *, int);
55 void locals_info (char *, int);
57 void (*deprecated_selected_frame_level_changed_hook
) (int);
59 void _initialize_stack (void);
61 /* Prototypes for local functions. */
63 static void down_command (char *, int);
65 static void down_silently_base (char *);
67 static void down_silently_command (char *, int);
69 static void up_command (char *, int);
71 static void up_silently_base (char *);
73 static void up_silently_command (char *, int);
75 void frame_command (char *, int);
77 static void current_frame_command (char *, int);
79 static void print_frame_arg_vars (struct frame_info
*, struct ui_file
*);
81 static void catch_info (char *, int);
83 static void args_plus_locals_info (char *, int);
85 static void print_frame_label_vars (struct frame_info
*, int,
88 static void print_frame_local_vars (struct frame_info
*, int,
91 static int print_block_frame_labels (struct block
*, int *,
94 static int print_block_frame_locals (struct block
*,
99 static void print_frame (struct frame_info
*fi
,
101 enum print_what print_what
,
103 struct symtab_and_line sal
);
105 static void set_current_sal_from_frame (struct frame_info
*, int);
107 static void backtrace_command (char *, int);
109 static void frame_info (char *, int);
111 extern int addressprint
; /* Print addresses, or stay symbolic only? */
113 /* Zero means do things normally; we are interacting directly with the
114 user. One means print the full filename and linenumber when a
115 frame is printed, and do so in a format emacs18/emacs19.22 can
116 parse. Two means print similar annotations, but in many more
117 cases and in a slightly different syntax. */
119 int annotation_level
= 0;
122 struct print_stack_frame_args
124 struct frame_info
*fi
;
126 enum print_what print_what
;
130 /* Show or print the frame arguments.
131 Pass the args the way catch_errors wants them. */
133 print_stack_frame_stub (void *args
)
135 struct print_stack_frame_args
*p
= args
;
136 int center
= (p
->print_what
== SRC_LINE
137 || p
->print_what
== SRC_AND_LOC
);
139 print_frame_info (p
->fi
, p
->print_level
, p
->print_what
, p
->print_args
);
140 set_current_sal_from_frame (p
->fi
, center
);
144 /* Show or print a stack frame FI briefly. The output is format
145 according to PRINT_LEVEL and PRINT_WHAT printing the frame's
146 relative level, function name, argument list, and file name and
147 line number. If the frame's PC is not at the beginning of the
148 source line, the actual PC is printed at the beginning. */
151 print_stack_frame (struct frame_info
*fi
, int print_level
,
152 enum print_what print_what
)
154 struct print_stack_frame_args args
;
157 args
.print_level
= print_level
;
158 args
.print_what
= print_what
;
161 catch_errors (print_stack_frame_stub
, (char *) &args
, "", RETURN_MASK_ALL
);
164 struct print_args_args
167 struct frame_info
*fi
;
168 struct ui_file
*stream
;
171 static int print_args_stub (void *);
173 /* Print nameless args on STREAM.
174 FI is the frameinfo for this frame, START is the offset
175 of the first nameless arg, and NUM is the number of nameless args to
176 print. FIRST is nonzero if this is the first argument (not just
177 the first nameless arg). */
180 print_frame_nameless_args (struct frame_info
*fi
, long start
, int num
,
181 int first
, struct ui_file
*stream
)
187 for (i
= 0; i
< num
; i
++)
190 argsaddr
= get_frame_args_address (fi
);
193 arg_value
= read_memory_integer (argsaddr
+ start
, sizeof (int));
195 fprintf_filtered (stream
, ", ");
196 fprintf_filtered (stream
, "%ld", arg_value
);
198 start
+= sizeof (int);
202 /* Print the arguments of a stack frame, given the function FUNC
203 running in that frame (as a symbol), the info on the frame,
204 and the number of args according to the stack frame (or -1 if unknown). */
206 /* References here and elsewhere to "number of args according to the
207 stack frame" appear in all cases to refer to "number of ints of args
208 according to the stack frame". At least for VAX, i386, isi. */
211 print_frame_args (struct symbol
*func
, struct frame_info
*fi
, int num
,
212 struct ui_file
*stream
)
214 struct block
*b
= NULL
;
216 struct dict_iterator iter
;
219 /* Offset of next stack argument beyond the one we have seen that is
220 at the highest offset.
221 -1 if we haven't come to a stack argument yet. */
222 long highest_offset
= -1;
224 /* Number of ints of arguments that we have printed so far. */
225 int args_printed
= 0;
226 struct cleanup
*old_chain
, *list_chain
;
227 struct ui_stream
*stb
;
229 stb
= ui_out_stream_new (uiout
);
230 old_chain
= make_cleanup_ui_out_stream_delete (stb
);
234 b
= SYMBOL_BLOCK_VALUE (func
);
236 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
240 /* Keep track of the highest stack argument offset seen, and
241 skip over any kinds of symbols we don't care about. */
243 switch (SYMBOL_CLASS (sym
))
248 long current_offset
= SYMBOL_VALUE (sym
);
249 arg_size
= TYPE_LENGTH (SYMBOL_TYPE (sym
));
251 /* Compute address of next argument by adding the size of
252 this argument and rounding to an int boundary. */
254 ((current_offset
+ arg_size
+ sizeof (int) - 1)
255 & ~(sizeof (int) - 1));
257 /* If this is the highest offset seen yet, set highest_offset. */
258 if (highest_offset
== -1
259 || (current_offset
> highest_offset
))
260 highest_offset
= current_offset
;
262 /* Add the number of ints we're about to print to args_printed. */
263 args_printed
+= (arg_size
+ sizeof (int) - 1) / sizeof (int);
266 /* We care about types of symbols, but don't need to keep track of
267 stack offsets in them. */
269 case LOC_REGPARM_ADDR
:
271 case LOC_BASEREG_ARG
:
272 case LOC_COMPUTED_ARG
:
275 /* Other types of symbols we just skip over. */
280 /* We have to look up the symbol because arguments can have
281 two entries (one a parameter, one a local) and the one we
282 want is the local, which lookup_symbol will find for us.
283 This includes gcc1 (not gcc2) on the sparc when passing a
284 small structure and gcc2 when the argument type is float
285 and it is passed as a double and converted to float by
286 the prologue (in the latter case the type of the LOC_ARG
287 symbol is double and the type of the LOC_LOCAL symbol is
289 /* But if the parameter name is null, don't try it.
290 Null parameter names occur on the RS/6000, for traceback tables.
291 FIXME, should we even print them? */
293 if (*DEPRECATED_SYMBOL_NAME (sym
))
297 (DEPRECATED_SYMBOL_NAME (sym
),
298 b
, VAR_DOMAIN
, (int *) NULL
, (struct symtab
**) NULL
);
299 if (SYMBOL_CLASS (nsym
) == LOC_REGISTER
)
301 /* There is a LOC_ARG/LOC_REGISTER pair. This means that
302 it was passed on the stack and loaded into a register,
303 or passed in a register and stored in a stack slot.
304 GDB 3.x used the LOC_ARG; GDB 4.0-4.11 used the LOC_REGISTER.
306 Reasons for using the LOC_ARG:
307 (1) because find_saved_registers may be slow for remote
309 (2) because registers are often re-used and stack slots
310 rarely (never?) are. Therefore using the stack slot is
311 much less likely to print garbage.
313 Reasons why we might want to use the LOC_REGISTER:
314 (1) So that the backtrace prints the same value as
315 "print foo". I see no compelling reason why this needs
316 to be the case; having the backtrace print the value which
317 was passed in, and "print foo" print the value as modified
318 within the called function, makes perfect sense to me.
320 Additional note: It might be nice if "info args" displayed
322 One more note: There is a case with sparc structure passing
323 where we need to use the LOC_REGISTER, but this is dealt with
324 by creating a single LOC_REGPARM in symbol reading. */
326 /* Leave sym (the LOC_ARG) alone. */
333 /* Print the current arg. */
335 ui_out_text (uiout
, ", ");
336 ui_out_wrap_hint (uiout
, " ");
338 annotate_arg_begin ();
340 list_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, NULL
);
341 fprintf_symbol_filtered (stb
->stream
, SYMBOL_PRINT_NAME (sym
),
342 SYMBOL_LANGUAGE (sym
), DMGL_PARAMS
| DMGL_ANSI
);
343 ui_out_field_stream (uiout
, "name", stb
);
344 annotate_arg_name_end ();
345 ui_out_text (uiout
, "=");
347 /* Avoid value_print because it will deref ref parameters. We just
348 want to print their addresses. Print ??? for args whose address
349 we do not know. We pass 2 as "recurse" to val_print because our
350 standard indentation here is 4 spaces, and val_print indents
351 2 for each recurse. */
352 val
= read_var_value (sym
, fi
);
354 annotate_arg_value (val
== NULL
? NULL
: value_type (val
));
358 common_val_print (val
, stb
->stream
, 0, 0, 2, Val_no_prettyprint
);
359 ui_out_field_stream (uiout
, "value", stb
);
362 ui_out_text (uiout
, "???");
364 /* Invoke ui_out_tuple_end. */
365 do_cleanups (list_chain
);
373 /* Don't print nameless args in situations where we don't know
374 enough about the stack to find them. */
379 if (highest_offset
== -1)
380 start
= FRAME_ARGS_SKIP
;
382 start
= highest_offset
;
384 print_frame_nameless_args (fi
, start
, num
- args_printed
,
387 do_cleanups (old_chain
);
390 /* Pass the args the way catch_errors wants them. */
393 print_args_stub (void *args
)
396 struct print_args_args
*p
= (struct print_args_args
*) args
;
398 if (FRAME_NUM_ARGS_P ())
400 numargs
= FRAME_NUM_ARGS (p
->fi
);
401 gdb_assert (numargs
>= 0);
405 print_frame_args (p
->func
, p
->fi
, numargs
, p
->stream
);
409 /* Set the current source and line to the location of the given
410 frame, if possible. When CENTER is true, adjust so the
411 relevant line is in the center of the next 'list'. */
414 set_current_sal_from_frame (struct frame_info
*fi
, int center
)
416 struct symtab_and_line sal
;
418 find_frame_sal (fi
, &sal
);
422 sal
.line
= max (sal
.line
- get_lines_to_list () / 2, 1);
423 set_current_source_symtab_and_line (&sal
);
427 /* Print information about a frame for frame "fi" at level "level".
428 Used in "where" output, also used to emit breakpoint or step
430 LEVEL is the level of the frame, or -1 if it is the
431 innermost frame but we don't want to print the level.
432 The meaning of the SOURCE argument is:
433 SRC_LINE: Print only source line
434 LOCATION: Print only location
435 LOC_AND_SRC: Print location and source line. */
438 print_frame_info (struct frame_info
*fi
, int print_level
,
439 enum print_what print_what
, int print_args
)
441 struct symtab_and_line sal
;
445 if (get_frame_type (fi
) == DUMMY_FRAME
446 || get_frame_type (fi
) == SIGTRAMP_FRAME
)
448 struct cleanup
*uiout_cleanup
449 = make_cleanup_ui_out_tuple_begin_end (uiout
, "frame");
451 annotate_frame_begin (print_level
? frame_relative_level (fi
) : 0,
454 /* Do this regardless of SOURCE because we don't have any source
455 to list for this frame. */
458 ui_out_text (uiout
, "#");
459 ui_out_field_fmt_int (uiout
, 2, ui_left
, "level",
460 frame_relative_level (fi
));
462 if (ui_out_is_mi_like_p (uiout
))
464 annotate_frame_address ();
465 ui_out_field_core_addr (uiout
, "addr", get_frame_pc (fi
));
466 annotate_frame_address_end ();
469 if (get_frame_type (fi
) == DUMMY_FRAME
)
471 annotate_function_call ();
472 ui_out_field_string (uiout
, "func", "<function called from gdb>");
474 else if (get_frame_type (fi
) == SIGTRAMP_FRAME
)
476 annotate_signal_handler_caller ();
477 ui_out_field_string (uiout
, "func", "<signal handler called>");
479 ui_out_text (uiout
, "\n");
480 annotate_frame_end ();
482 do_cleanups (uiout_cleanup
);
486 /* If fi is not the innermost frame, that normally means that fi->pc
487 points to *after* the call instruction, and we want to get the
488 line containing the call, never the next line. But if the next
489 frame is a SIGTRAMP_FRAME or a DUMMY_FRAME, then the next frame
490 was not entered as the result of a call, and we want to get the
491 line containing fi->pc. */
492 find_frame_sal (fi
, &sal
);
494 location_print
= (print_what
== LOCATION
495 || print_what
== LOC_AND_ADDRESS
496 || print_what
== SRC_AND_LOC
);
498 if (location_print
|| !sal
.symtab
)
499 print_frame (fi
, print_level
, print_what
, print_args
, sal
);
501 source_print
= (print_what
== SRC_LINE
|| print_what
== SRC_AND_LOC
);
503 if (source_print
&& sal
.symtab
)
506 int mid_statement
= ((print_what
== SRC_LINE
)
507 && (get_frame_pc (fi
) != sal
.pc
));
509 if (annotation_level
)
510 done
= identify_source_line (sal
.symtab
, sal
.line
, mid_statement
,
514 if (deprecated_print_frame_info_listing_hook
)
515 deprecated_print_frame_info_listing_hook (sal
.symtab
,
520 /* We used to do this earlier, but that is clearly
521 wrong. This function is used by many different
522 parts of gdb, including normal_stop in infrun.c,
523 which uses this to print out the current PC
524 when we stepi/nexti into the middle of a source
525 line. Only the command line really wants this
526 behavior. Other UIs probably would like the
527 ability to decide for themselves if it is desired. */
528 if (addressprint
&& mid_statement
)
530 ui_out_field_core_addr (uiout
, "addr", get_frame_pc (fi
));
531 ui_out_text (uiout
, "\t");
534 print_source_lines (sal
.symtab
, sal
.line
, sal
.line
+ 1, 0);
539 if (print_what
!= LOCATION
)
540 set_default_breakpoint (1, get_frame_pc (fi
), sal
.symtab
, sal
.line
);
542 annotate_frame_end ();
544 gdb_flush (gdb_stdout
);
548 print_frame (struct frame_info
*fi
,
550 enum print_what print_what
,
552 struct symtab_and_line sal
)
556 enum language funlang
= language_unknown
;
557 struct ui_stream
*stb
;
558 struct cleanup
*old_chain
;
559 struct cleanup
*list_chain
;
561 stb
= ui_out_stream_new (uiout
);
562 old_chain
= make_cleanup_ui_out_stream_delete (stb
);
564 func
= find_pc_function (get_frame_address_in_block (fi
));
567 /* In certain pathological cases, the symtabs give the wrong
568 function (when we are in the first function in a file which
569 is compiled without debugging symbols, the previous function
570 is compiled with debugging symbols, and the "foo.o" symbol
571 that is supposed to tell us where the file with debugging symbols
572 ends has been truncated by ar because it is longer than 15
573 characters). This also occurs if the user uses asm() to create
574 a function but not stabs for it (in a file compiled -g).
576 So look in the minimal symbol tables as well, and if it comes
577 up with a larger address for the function use that instead.
578 I don't think this can ever cause any problems; there shouldn't
579 be any minimal symbols in the middle of a function; if this is
580 ever changed many parts of GDB will need to be changed (and we'll
581 create a find_pc_minimal_function or some such). */
583 struct minimal_symbol
*msymbol
= lookup_minimal_symbol_by_pc (get_frame_address_in_block (fi
));
585 && (SYMBOL_VALUE_ADDRESS (msymbol
)
586 > BLOCK_START (SYMBOL_BLOCK_VALUE (func
))))
588 /* We also don't know anything about the function besides
589 its address and name. */
591 funname
= DEPRECATED_SYMBOL_NAME (msymbol
);
592 funlang
= SYMBOL_LANGUAGE (msymbol
);
596 /* I'd like to use SYMBOL_PRINT_NAME() here, to display the
597 demangled name that we already have stored in the symbol
598 table, but we stored a version with DMGL_PARAMS turned
599 on, and here we don't want to display parameters. So call
600 the demangler again, with DMGL_ANSI only. (Yes, I know
601 that printf_symbol_filtered() will again try to demangle
602 the name on the fly, but the issue is that if
603 cplus_demangle() fails here, it'll fail there too. So we
604 want to catch the failure ("demangled==NULL" case below)
605 here, while we still have our hands on the function
608 funname
= DEPRECATED_SYMBOL_NAME (func
);
609 funlang
= SYMBOL_LANGUAGE (func
);
610 if (funlang
== language_cplus
)
612 demangled
= cplus_demangle (funname
, DMGL_ANSI
);
613 if (demangled
== NULL
)
614 /* If the demangler fails, try the demangled name from
615 the symbol table. This'll have parameters, but
616 that's preferable to diplaying a mangled name. */
617 funname
= SYMBOL_PRINT_NAME (func
);
623 struct minimal_symbol
*msymbol
= lookup_minimal_symbol_by_pc (get_frame_address_in_block (fi
));
626 funname
= DEPRECATED_SYMBOL_NAME (msymbol
);
627 funlang
= SYMBOL_LANGUAGE (msymbol
);
631 annotate_frame_begin (print_level
? frame_relative_level (fi
) : 0,
634 list_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "frame");
638 ui_out_text (uiout
, "#");
639 ui_out_field_fmt_int (uiout
, 2, ui_left
, "level",
640 frame_relative_level (fi
));
643 if (get_frame_pc (fi
) != sal
.pc
645 || print_what
== LOC_AND_ADDRESS
)
647 annotate_frame_address ();
648 ui_out_field_core_addr (uiout
, "addr", get_frame_pc (fi
));
649 annotate_frame_address_end ();
650 ui_out_text (uiout
, " in ");
652 annotate_frame_function_name ();
653 fprintf_symbol_filtered (stb
->stream
, funname
? funname
: "??", funlang
,
655 ui_out_field_stream (uiout
, "func", stb
);
656 ui_out_wrap_hint (uiout
, " ");
657 annotate_frame_args ();
659 ui_out_text (uiout
, " (");
662 struct print_args_args args
;
663 struct cleanup
*args_list_chain
;
666 args
.stream
= gdb_stdout
;
667 args_list_chain
= make_cleanup_ui_out_list_begin_end (uiout
, "args");
668 catch_errors (print_args_stub
, &args
, "", RETURN_MASK_ALL
);
669 /* FIXME: args must be a list. If one argument is a string it will
670 have " that will not be properly escaped. */
671 /* Invoke ui_out_tuple_end. */
672 do_cleanups (args_list_chain
);
675 ui_out_text (uiout
, ")");
676 if (sal
.symtab
&& sal
.symtab
->filename
)
678 annotate_frame_source_begin ();
679 ui_out_wrap_hint (uiout
, " ");
680 ui_out_text (uiout
, " at ");
681 annotate_frame_source_file ();
682 ui_out_field_string (uiout
, "file", sal
.symtab
->filename
);
683 annotate_frame_source_file_end ();
684 ui_out_text (uiout
, ":");
685 annotate_frame_source_line ();
686 ui_out_field_int (uiout
, "line", sal
.line
);
687 annotate_frame_source_end ();
690 if (!funname
|| (!sal
.symtab
|| !sal
.symtab
->filename
))
693 char *lib
= PC_SOLIB (get_frame_pc (fi
));
695 char *lib
= solib_address (get_frame_pc (fi
));
699 annotate_frame_where ();
700 ui_out_wrap_hint (uiout
, " ");
701 ui_out_text (uiout
, " from ");
702 ui_out_field_string (uiout
, "from", lib
);
706 /* do_cleanups will call ui_out_tuple_end() for us. */
707 do_cleanups (list_chain
);
708 ui_out_text (uiout
, "\n");
709 do_cleanups (old_chain
);
712 /* Show the frame info. If this is the tui, it will be shown in
713 the source display otherwise, nothing is done */
715 show_stack_frame (struct frame_info
*fi
)
720 /* Read a frame specification in whatever the appropriate format is.
721 Call error() if the specification is in any way invalid (i.e. this
722 function never returns NULL). When SEPECTED_P is non-NULL set it's
723 target to indicate that the default selected frame was used. */
725 static struct frame_info
*
726 parse_frame_specification_1 (const char *frame_exp
, const char *message
,
727 int *selected_frame_p
)
730 struct value
*args
[4];
731 CORE_ADDR addrs
[ARRAY_SIZE (args
)];
733 if (frame_exp
== NULL
)
738 struct cleanup
*tmp_cleanup
;
744 struct cleanup
*cleanup
;
747 /* Skip leading white space, bail of EOL. */
748 while (isspace (*frame_exp
))
753 /* Parse the argument, extract it, save it. */
757 addr_string
= savestring (frame_exp
, p
- frame_exp
);
759 cleanup
= make_cleanup (xfree
, addr_string
);
761 /* NOTE: Parse and evaluate expression, but do not use
762 functions such as parse_and_eval_long or
763 parse_and_eval_address to also extract the value.
764 Instead value_as_long and value_as_address are used.
765 This avoids problems with expressions that contain
767 if (numargs
>= ARRAY_SIZE (args
))
768 error (_("Too many args in frame specification"));
769 args
[numargs
++] = parse_and_eval (addr_string
);
771 do_cleanups (cleanup
);
775 /* If no args, default to the selected frame. */
778 if (selected_frame_p
!= NULL
)
779 (*selected_frame_p
) = 1;
780 return get_selected_frame (message
);
783 /* None of the remaining use the selected frame. */
784 if (selected_frame_p
!= NULL
)
785 (*selected_frame_p
) = 0;
787 /* Assume the single arg[0] is an integer, and try using that to
788 select a frame relative to current. */
791 struct frame_info
*fid
;
792 int level
= value_as_long (args
[0]);
793 fid
= find_relative_frame (get_current_frame (), &level
);
795 /* find_relative_frame was successful */
799 /* Convert each value into a corresponding address. */
802 for (i
= 0; i
< numargs
; i
++)
803 addrs
[i
] = value_as_address (args
[0]);
806 /* Assume that the single arg[0] is an address, use that to identify
807 a frame with a matching ID. Should this also accept stack/pc or
811 struct frame_id id
= frame_id_build_wild (addrs
[0]);
812 struct frame_info
*fid
;
814 /* If SETUP_ARBITRARY_FRAME is defined, then frame
815 specifications take at least 2 addresses. It is important to
816 detect this case here so that "frame 100" does not give a
817 confusing error message like "frame specification requires
818 two addresses". This of course does not solve the "frame
819 100" problem for machines on which a frame specification can
820 be made with one address. To solve that, we need a new
821 syntax for a specifying a frame by address. I think the
822 cleanest syntax is $frame(0x45) ($frame(0x23,0x45) for two
823 args, etc.), but people might think that is too much typing,
824 so I guess *0x23,0x45 would be a possible alternative (commas
825 really should be used instead of spaces to delimit; using
826 spaces normally works in an expression). */
827 #ifdef SETUP_ARBITRARY_FRAME
828 error (_("No frame %s"), paddr_d (addrs
[0]));
830 /* If (s)he specifies the frame with an address, he deserves
831 what (s)he gets. Still, give the highest one that matches.
832 (NOTE: cagney/2004-10-29: Why highest, or outer-most, I don't
834 for (fid
= get_current_frame ();
836 fid
= get_prev_frame (fid
))
838 if (frame_id_eq (id
, get_frame_id (fid
)))
840 while (frame_id_eq (id
, frame_unwind_id (fid
)))
841 fid
= get_prev_frame (fid
);
847 /* We couldn't identify the frame as an existing frame, but
848 perhaps we can create one with a single argument. */
850 return create_new_frame (addrs
[0], 0);
851 else if (numargs
== 2)
852 return create_new_frame (addrs
[0], addrs
[1]);
854 error (_("Too many args in frame specification"));
858 parse_frame_specification (char *frame_exp
)
860 return parse_frame_specification_1 (frame_exp
, NULL
, NULL
);
863 /* Print verbosely the selected frame or the frame at address ADDR.
864 This means absolutely all information in the frame is printed. */
867 frame_info (char *addr_exp
, int from_tty
)
869 struct frame_info
*fi
;
870 struct symtab_and_line sal
;
873 struct frame_info
*calling_frame_info
;
874 int i
, count
, numregs
;
876 enum language funlang
= language_unknown
;
877 const char *pc_regname
;
878 int selected_frame_p
;
880 fi
= parse_frame_specification_1 (addr_exp
, "No stack.", &selected_frame_p
);
882 /* Name of the value returned by get_frame_pc(). Per comments, "pc"
883 is not a good name. */
885 /* OK, this is weird. The PC_REGNUM hardware register's value can
886 easily not match that of the internal value returned by
888 pc_regname
= REGISTER_NAME (PC_REGNUM
);
890 /* But then, this is weird to. Even without PC_REGNUM, an
891 architectures will often have a hardware register called "pc",
892 and that register's value, again, can easily not match
896 find_frame_sal (fi
, &sal
);
897 func
= get_frame_function (fi
);
898 /* FIXME: cagney/2002-11-28: Why bother? Won't sal.symtab contain
900 s
= find_pc_symtab (get_frame_pc (fi
));
903 /* I'd like to use SYMBOL_PRINT_NAME() here, to display
904 * the demangled name that we already have stored in
905 * the symbol table, but we stored a version with
906 * DMGL_PARAMS turned on, and here we don't want
907 * to display parameters. So call the demangler again,
908 * with DMGL_ANSI only. RT
909 * (Yes, I know that printf_symbol_filtered() will
910 * again try to demangle the name on the fly, but
911 * the issue is that if cplus_demangle() fails here,
912 * it'll fail there too. So we want to catch the failure
913 * ("demangled==NULL" case below) here, while we still
914 * have our hands on the function symbol.)
917 funname
= DEPRECATED_SYMBOL_NAME (func
);
918 funlang
= SYMBOL_LANGUAGE (func
);
919 if (funlang
== language_cplus
)
921 demangled
= cplus_demangle (funname
, DMGL_ANSI
);
922 /* If the demangler fails, try the demangled name
923 * from the symbol table. This'll have parameters,
924 * but that's preferable to diplaying a mangled name.
926 if (demangled
== NULL
)
927 funname
= SYMBOL_PRINT_NAME (func
);
932 struct minimal_symbol
*msymbol
= lookup_minimal_symbol_by_pc (get_frame_pc (fi
));
935 funname
= DEPRECATED_SYMBOL_NAME (msymbol
);
936 funlang
= SYMBOL_LANGUAGE (msymbol
);
939 calling_frame_info
= get_prev_frame (fi
);
941 if (selected_frame_p
&& frame_relative_level (fi
) >= 0)
943 printf_filtered (_("Stack level %d, frame at "),
944 frame_relative_level (fi
));
945 deprecated_print_address_numeric (get_frame_base (fi
), 1, gdb_stdout
);
946 printf_filtered (":\n");
950 printf_filtered (_("Stack frame at "));
951 deprecated_print_address_numeric (get_frame_base (fi
), 1, gdb_stdout
);
952 printf_filtered (":\n");
954 printf_filtered (" %s = ", pc_regname
);
955 deprecated_print_address_numeric (get_frame_pc (fi
), 1, gdb_stdout
);
960 printf_filtered (" in ");
961 fprintf_symbol_filtered (gdb_stdout
, funname
, funlang
,
962 DMGL_ANSI
| DMGL_PARAMS
);
966 printf_filtered (" (%s:%d)", sal
.symtab
->filename
, sal
.line
);
967 puts_filtered ("; ");
969 printf_filtered ("saved %s ", pc_regname
);
970 deprecated_print_address_numeric (frame_pc_unwind (fi
), 1, gdb_stdout
);
971 printf_filtered ("\n");
973 if (calling_frame_info
)
975 printf_filtered (" called by frame at ");
976 deprecated_print_address_numeric (get_frame_base (calling_frame_info
),
979 if (get_next_frame (fi
) && calling_frame_info
)
982 if (get_next_frame (fi
))
984 printf_filtered (" caller of frame at ");
985 deprecated_print_address_numeric (get_frame_base (get_next_frame (fi
)), 1,
988 if (get_next_frame (fi
) || calling_frame_info
)
989 puts_filtered ("\n");
991 printf_filtered (" source language %s.\n",
992 language_str (s
->language
));
995 /* Address of the argument list for this frame, or 0. */
996 CORE_ADDR arg_list
= get_frame_args_address (fi
);
997 /* Number of args for this frame, or -1 if unknown. */
1001 printf_filtered (" Arglist at unknown address.\n");
1004 printf_filtered (" Arglist at ");
1005 deprecated_print_address_numeric (arg_list
, 1, gdb_stdout
);
1006 printf_filtered (",");
1008 if (!FRAME_NUM_ARGS_P ())
1011 puts_filtered (" args: ");
1015 numargs
= FRAME_NUM_ARGS (fi
);
1016 gdb_assert (numargs
>= 0);
1018 puts_filtered (" no args.");
1019 else if (numargs
== 1)
1020 puts_filtered (" 1 arg: ");
1022 printf_filtered (" %d args: ", numargs
);
1024 print_frame_args (func
, fi
, numargs
, gdb_stdout
);
1025 puts_filtered ("\n");
1029 /* Address of the local variables for this frame, or 0. */
1030 CORE_ADDR arg_list
= get_frame_locals_address (fi
);
1033 printf_filtered (" Locals at unknown address,");
1036 printf_filtered (" Locals at ");
1037 deprecated_print_address_numeric (arg_list
, 1, gdb_stdout
);
1038 printf_filtered (",");
1042 /* Print as much information as possible on the location of all the
1045 enum lval_type lval
;
1053 /* The sp is special; what's displayed isn't the save address, but
1054 the value of the previous frame's sp. This is a legacy thing,
1055 at one stage the frame cached the previous frame's SP instead
1056 of its address, hence it was easiest to just display the cached
1060 /* Find out the location of the saved stack pointer with out
1061 actually evaluating it. */
1062 frame_register_unwind (fi
, SP_REGNUM
, &optimized
, &lval
, &addr
,
1064 if (!optimized
&& lval
== not_lval
)
1066 char value
[MAX_REGISTER_SIZE
];
1068 frame_register_unwind (fi
, SP_REGNUM
, &optimized
, &lval
, &addr
,
1070 /* NOTE: cagney/2003-05-22: This is assuming that the
1071 stack pointer was packed as an unsigned integer. That
1072 may or may not be valid. */
1073 sp
= extract_unsigned_integer (value
, register_size (current_gdbarch
, SP_REGNUM
));
1074 printf_filtered (" Previous frame's sp is ");
1075 deprecated_print_address_numeric (sp
, 1, gdb_stdout
);
1076 printf_filtered ("\n");
1079 else if (!optimized
&& lval
== lval_memory
)
1081 printf_filtered (" Previous frame's sp at ");
1082 deprecated_print_address_numeric (addr
, 1, gdb_stdout
);
1083 printf_filtered ("\n");
1086 else if (!optimized
&& lval
== lval_register
)
1088 printf_filtered (" Previous frame's sp in %s\n",
1089 REGISTER_NAME (realnum
));
1092 /* else keep quiet. */
1096 numregs
= NUM_REGS
+ NUM_PSEUDO_REGS
;
1097 for (i
= 0; i
< numregs
; i
++)
1099 && gdbarch_register_reggroup_p (current_gdbarch
, i
, all_reggroup
))
1101 /* Find out the location of the saved register without
1102 fetching the corresponding value. */
1103 frame_register_unwind (fi
, i
, &optimized
, &lval
, &addr
, &realnum
,
1105 /* For moment, only display registers that were saved on the
1107 if (!optimized
&& lval
== lval_memory
)
1110 puts_filtered (" Saved registers:\n ");
1112 puts_filtered (",");
1114 printf_filtered (" %s at ", REGISTER_NAME (i
));
1115 deprecated_print_address_numeric (addr
, 1, gdb_stdout
);
1119 if (count
|| need_nl
)
1120 puts_filtered ("\n");
1124 /* Print briefly all stack frames or just the innermost COUNT frames. */
1126 static void backtrace_command_1 (char *count_exp
, int show_locals
,
1129 backtrace_command_1 (char *count_exp
, int show_locals
, int from_tty
)
1131 struct frame_info
*fi
;
1134 struct frame_info
*trailing
;
1137 if (!target_has_stack
)
1138 error (_("No stack."));
1140 /* The following code must do two things. First, it must
1141 set the variable TRAILING to the frame from which we should start
1142 printing. Second, it must set the variable count to the number
1143 of frames which we should print, or -1 if all of them. */
1144 trailing
= get_current_frame ();
1146 /* The target can be in a state where there is no valid frames
1147 (e.g., just connected). */
1148 if (trailing
== NULL
)
1149 error (_("No stack."));
1154 count
= parse_and_eval_long (count_exp
);
1157 struct frame_info
*current
;
1162 while (current
&& count
--)
1165 current
= get_prev_frame (current
);
1168 /* Will stop when CURRENT reaches the top of the stack. TRAILING
1169 will be COUNT below it. */
1173 trailing
= get_prev_frame (trailing
);
1174 current
= get_prev_frame (current
);
1186 struct partial_symtab
*ps
;
1188 /* Read in symbols for all of the frames. Need to do this in
1189 a separate pass so that "Reading in symbols for xxx" messages
1190 don't screw up the appearance of the backtrace. Also
1191 if people have strong opinions against reading symbols for
1192 backtrace this may have to be an option. */
1196 fi
= get_prev_frame (fi
))
1199 ps
= find_pc_psymtab (get_frame_address_in_block (fi
));
1201 PSYMTAB_TO_SYMTAB (ps
); /* Force syms to come in */
1205 for (i
= 0, fi
= trailing
;
1207 i
++, fi
= get_prev_frame (fi
))
1211 /* Don't use print_stack_frame; if an error() occurs it probably
1212 means further attempts to backtrace would fail (on the other
1213 hand, perhaps the code does or could be fixed to make sure
1214 the frame->prev field gets set to NULL in that case). */
1215 print_frame_info (fi
, 1, LOCATION
, 1);
1217 print_frame_local_vars (fi
, 1, gdb_stdout
);
1220 /* If we've stopped before the end, mention that. */
1222 printf_filtered (_("(More stack frames follow...)\n"));
1225 struct backtrace_command_args
1232 /* Stub to call backtrace_command_1 by way of an error catcher. */
1234 backtrace_command_stub (void *data
)
1236 struct backtrace_command_args
*args
= (struct backtrace_command_args
*)data
;
1237 backtrace_command_1 (args
->count_exp
, args
->show_locals
, args
->from_tty
);
1242 backtrace_command (char *arg
, int from_tty
)
1244 struct cleanup
*old_chain
= (struct cleanup
*) NULL
;
1245 char **argv
= (char **) NULL
;
1246 int argIndicatingFullTrace
= (-1), totArgLen
= 0, argc
= 0;
1248 struct backtrace_command_args btargs
;
1250 if (arg
!= (char *) NULL
)
1254 argv
= buildargv (arg
);
1255 old_chain
= make_cleanup_freeargv (argv
);
1257 for (i
= 0; (argv
[i
] != (char *) NULL
); i
++)
1261 for (j
= 0; (j
< strlen (argv
[i
])); j
++)
1262 argv
[i
][j
] = tolower (argv
[i
][j
]);
1264 if (argIndicatingFullTrace
< 0 && subset_compare (argv
[i
], "full"))
1265 argIndicatingFullTrace
= argc
;
1269 totArgLen
+= strlen (argv
[i
]);
1273 if (argIndicatingFullTrace
>= 0)
1277 argPtr
= (char *) xmalloc (totArgLen
+ 1);
1282 memset (argPtr
, 0, totArgLen
+ 1);
1283 for (i
= 0; (i
< (argc
+ 1)); i
++)
1285 if (i
!= argIndicatingFullTrace
)
1287 strcat (argPtr
, argv
[i
]);
1288 strcat (argPtr
, " ");
1294 argPtr
= (char *) NULL
;
1298 btargs
.count_exp
= argPtr
;
1299 btargs
.show_locals
= (argIndicatingFullTrace
>= 0);
1300 btargs
.from_tty
= from_tty
;
1301 catch_errors (backtrace_command_stub
, (char *)&btargs
, "", RETURN_MASK_ERROR
);
1303 if (argIndicatingFullTrace
>= 0 && totArgLen
> 0)
1307 do_cleanups (old_chain
);
1310 static void backtrace_full_command (char *arg
, int from_tty
);
1312 backtrace_full_command (char *arg
, int from_tty
)
1314 struct backtrace_command_args btargs
;
1315 btargs
.count_exp
= arg
;
1316 btargs
.show_locals
= 1;
1317 btargs
.from_tty
= from_tty
;
1318 catch_errors (backtrace_command_stub
, (char *)&btargs
, "", RETURN_MASK_ERROR
);
1322 /* Print the local variables of a block B active in FRAME.
1323 Return 1 if any variables were printed; 0 otherwise. */
1326 print_block_frame_locals (struct block
*b
, struct frame_info
*fi
,
1327 int num_tabs
, struct ui_file
*stream
)
1329 struct dict_iterator iter
;
1332 int values_printed
= 0;
1334 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
1336 switch (SYMBOL_CLASS (sym
))
1344 for (j
= 0; j
< num_tabs
; j
++)
1345 fputs_filtered ("\t", stream
);
1346 fputs_filtered (SYMBOL_PRINT_NAME (sym
), stream
);
1347 fputs_filtered (" = ", stream
);
1348 print_variable_value (sym
, fi
, stream
);
1349 fprintf_filtered (stream
, "\n");
1353 /* Ignore symbols which are not locals. */
1357 return values_printed
;
1360 /* Same, but print labels. */
1363 print_block_frame_labels (struct block
*b
, int *have_default
,
1364 struct ui_file
*stream
)
1366 struct dict_iterator iter
;
1368 int values_printed
= 0;
1370 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
1372 if (strcmp (DEPRECATED_SYMBOL_NAME (sym
), "default") == 0)
1378 if (SYMBOL_CLASS (sym
) == LOC_LABEL
)
1380 struct symtab_and_line sal
;
1381 sal
= find_pc_line (SYMBOL_VALUE_ADDRESS (sym
), 0);
1383 fputs_filtered (SYMBOL_PRINT_NAME (sym
), stream
);
1386 fprintf_filtered (stream
, " ");
1387 deprecated_print_address_numeric (SYMBOL_VALUE_ADDRESS (sym
), 1, stream
);
1389 fprintf_filtered (stream
, " in file %s, line %d\n",
1390 sal
.symtab
->filename
, sal
.line
);
1393 return values_printed
;
1396 /* Print on STREAM all the local variables in frame FRAME,
1397 including all the blocks active in that frame
1400 Returns 1 if the job was done,
1401 or 0 if nothing was printed because we have no info
1402 on the function running in FRAME. */
1405 print_frame_local_vars (struct frame_info
*fi
, int num_tabs
,
1406 struct ui_file
*stream
)
1408 struct block
*block
= get_frame_block (fi
, 0);
1409 int values_printed
= 0;
1413 fprintf_filtered (stream
, "No symbol table info available.\n");
1419 if (print_block_frame_locals (block
, fi
, num_tabs
, stream
))
1421 /* After handling the function's top-level block, stop.
1422 Don't continue to its superblock, the block of
1423 per-file symbols. */
1424 if (BLOCK_FUNCTION (block
))
1426 block
= BLOCK_SUPERBLOCK (block
);
1429 if (!values_printed
)
1431 fprintf_filtered (stream
, "No locals.\n");
1435 /* Same, but print labels. */
1438 print_frame_label_vars (struct frame_info
*fi
, int this_level_only
,
1439 struct ui_file
*stream
)
1441 struct blockvector
*bl
;
1442 struct block
*block
= get_frame_block (fi
, 0);
1443 int values_printed
= 0;
1444 int index
, have_default
= 0;
1445 char *blocks_printed
;
1446 CORE_ADDR pc
= get_frame_pc (fi
);
1450 fprintf_filtered (stream
, "No symbol table info available.\n");
1454 bl
= blockvector_for_pc (BLOCK_END (block
) - 4, &index
);
1455 blocks_printed
= (char *) alloca (BLOCKVECTOR_NBLOCKS (bl
) * sizeof (char));
1456 memset (blocks_printed
, 0, BLOCKVECTOR_NBLOCKS (bl
) * sizeof (char));
1460 CORE_ADDR end
= BLOCK_END (block
) - 4;
1463 if (bl
!= blockvector_for_pc (end
, &index
))
1464 error (_("blockvector blotch"));
1465 if (BLOCKVECTOR_BLOCK (bl
, index
) != block
)
1466 error (_("blockvector botch"));
1467 last_index
= BLOCKVECTOR_NBLOCKS (bl
);
1470 /* Don't print out blocks that have gone by. */
1471 while (index
< last_index
1472 && BLOCK_END (BLOCKVECTOR_BLOCK (bl
, index
)) < pc
)
1475 while (index
< last_index
1476 && BLOCK_END (BLOCKVECTOR_BLOCK (bl
, index
)) < end
)
1478 if (blocks_printed
[index
] == 0)
1480 if (print_block_frame_labels (BLOCKVECTOR_BLOCK (bl
, index
), &have_default
, stream
))
1482 blocks_printed
[index
] = 1;
1488 if (values_printed
&& this_level_only
)
1491 /* After handling the function's top-level block, stop.
1492 Don't continue to its superblock, the block of
1493 per-file symbols. */
1494 if (BLOCK_FUNCTION (block
))
1496 block
= BLOCK_SUPERBLOCK (block
);
1499 if (!values_printed
&& !this_level_only
)
1501 fprintf_filtered (stream
, "No catches.\n");
1506 locals_info (char *args
, int from_tty
)
1508 print_frame_local_vars (get_selected_frame ("No frame selected."),
1513 catch_info (char *ignore
, int from_tty
)
1515 struct symtab_and_line
*sal
;
1517 /* Check for target support for exception handling */
1518 sal
= target_enable_exception_callback (EX_EVENT_CATCH
, 1);
1521 /* Currently not handling this */
1522 /* Ideally, here we should interact with the C++ runtime
1523 system to find the list of active handlers, etc. */
1524 fprintf_filtered (gdb_stdout
, "Info catch not supported with this target/compiler combination.\n");
1528 /* Assume g++ compiled code -- old v 4.16 behaviour */
1529 print_frame_label_vars (get_selected_frame ("No frame selected."),
1535 print_frame_arg_vars (struct frame_info
*fi
,
1536 struct ui_file
*stream
)
1538 struct symbol
*func
= get_frame_function (fi
);
1540 struct dict_iterator iter
;
1541 struct symbol
*sym
, *sym2
;
1542 int values_printed
= 0;
1546 fprintf_filtered (stream
, "No symbol table info available.\n");
1550 b
= SYMBOL_BLOCK_VALUE (func
);
1551 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
1553 switch (SYMBOL_CLASS (sym
))
1559 case LOC_REGPARM_ADDR
:
1560 case LOC_BASEREG_ARG
:
1561 case LOC_COMPUTED_ARG
:
1563 fputs_filtered (SYMBOL_PRINT_NAME (sym
), stream
);
1564 fputs_filtered (" = ", stream
);
1566 /* We have to look up the symbol because arguments can have
1567 two entries (one a parameter, one a local) and the one we
1568 want is the local, which lookup_symbol will find for us.
1569 This includes gcc1 (not gcc2) on the sparc when passing a
1570 small structure and gcc2 when the argument type is float
1571 and it is passed as a double and converted to float by
1572 the prologue (in the latter case the type of the LOC_ARG
1573 symbol is double and the type of the LOC_LOCAL symbol is
1574 float). There are also LOC_ARG/LOC_REGISTER pairs which
1575 are not combined in symbol-reading. */
1577 sym2
= lookup_symbol (DEPRECATED_SYMBOL_NAME (sym
),
1578 b
, VAR_DOMAIN
, (int *) NULL
, (struct symtab
**) NULL
);
1579 print_variable_value (sym2
, fi
, stream
);
1580 fprintf_filtered (stream
, "\n");
1584 /* Don't worry about things which aren't arguments. */
1588 if (!values_printed
)
1590 fprintf_filtered (stream
, "No arguments.\n");
1595 args_info (char *ignore
, int from_tty
)
1597 print_frame_arg_vars (get_selected_frame ("No frame selected."),
1603 args_plus_locals_info (char *ignore
, int from_tty
)
1605 args_info (ignore
, from_tty
);
1606 locals_info (ignore
, from_tty
);
1610 /* Select frame FI. Also print the stack frame and show the source if
1611 this is the tui version. */
1613 select_and_print_frame (struct frame_info
*fi
)
1617 print_stack_frame (fi
, 1, SRC_AND_LOC
);
1620 /* Return the symbol-block in which the selected frame is executing.
1621 Can return zero under various legitimate circumstances.
1623 If ADDR_IN_BLOCK is non-zero, set *ADDR_IN_BLOCK to the relevant
1624 code address within the block returned. We use this to decide
1625 which macros are in scope. */
1628 get_selected_block (CORE_ADDR
*addr_in_block
)
1630 if (!target_has_stack
)
1633 /* NOTE: cagney/2002-11-28: Why go to all this effort to not create
1634 a selected/current frame? Perhaps this function is called,
1635 indirectly, by WFI in "infrun.c" where avoiding the creation of
1636 an inner most frame is very important (it slows down single
1637 step). I suspect, though that this was true in the deep dark
1638 past but is no longer the case. A mindless look at all the
1639 callers tends to support this theory. I think we should be able
1640 to assume that there is always a selcted frame. */
1641 /* gdb_assert (deprecated_selected_frame != NULL); So, do you feel
1643 if (!deprecated_selected_frame
)
1645 CORE_ADDR pc
= read_pc ();
1646 if (addr_in_block
!= NULL
)
1647 *addr_in_block
= pc
;
1648 return block_for_pc (pc
);
1650 return get_frame_block (deprecated_selected_frame
, addr_in_block
);
1653 /* Find a frame a certain number of levels away from FRAME.
1654 LEVEL_OFFSET_PTR points to an int containing the number of levels.
1655 Positive means go to earlier frames (up); negative, the reverse.
1656 The int that contains the number of levels is counted toward
1657 zero as the frames for those levels are found.
1658 If the top or bottom frame is reached, that frame is returned,
1659 but the final value of *LEVEL_OFFSET_PTR is nonzero and indicates
1660 how much farther the original request asked to go. */
1663 find_relative_frame (struct frame_info
*frame
,
1664 int *level_offset_ptr
)
1666 struct frame_info
*prev
;
1667 struct frame_info
*frame1
;
1669 /* Going up is simple: just do get_prev_frame enough times
1670 or until initial frame is reached. */
1671 while (*level_offset_ptr
> 0)
1673 prev
= get_prev_frame (frame
);
1676 (*level_offset_ptr
)--;
1679 /* Going down is just as simple. */
1680 if (*level_offset_ptr
< 0)
1682 while (*level_offset_ptr
< 0)
1684 frame1
= get_next_frame (frame
);
1688 (*level_offset_ptr
)++;
1694 /* The "select_frame" command. With no arg, NOP.
1695 With arg LEVEL_EXP, select the frame at level LEVEL if it is a
1696 valid level. Otherwise, treat level_exp as an address expression
1697 and select it. See parse_frame_specification for more info on proper
1698 frame expressions. */
1701 select_frame_command (char *level_exp
, int from_tty
)
1703 select_frame (parse_frame_specification_1 (level_exp
, "No stack.", NULL
));
1706 /* The "frame" command. With no arg, print selected frame briefly.
1707 With arg, behaves like select_frame and then prints the selected
1711 frame_command (char *level_exp
, int from_tty
)
1713 select_frame_command (level_exp
, from_tty
);
1714 print_stack_frame (get_selected_frame (NULL
), 1, SRC_AND_LOC
);
1717 /* The XDB Compatibility command to print the current frame. */
1720 current_frame_command (char *level_exp
, int from_tty
)
1722 print_stack_frame (get_selected_frame ("No stack."), 1, SRC_AND_LOC
);
1725 /* Select the frame up one or COUNT stack levels
1726 from the previously selected frame, and print it briefly. */
1729 up_silently_base (char *count_exp
)
1731 struct frame_info
*fi
;
1732 int count
= 1, count1
;
1734 count
= parse_and_eval_long (count_exp
);
1737 fi
= find_relative_frame (get_selected_frame ("No stack."), &count1
);
1738 if (count1
!= 0 && count_exp
== 0)
1739 error (_("Initial frame selected; you cannot go up."));
1744 up_silently_command (char *count_exp
, int from_tty
)
1746 up_silently_base (count_exp
);
1750 up_command (char *count_exp
, int from_tty
)
1752 up_silently_base (count_exp
);
1753 print_stack_frame (get_selected_frame (NULL
), 1, SRC_AND_LOC
);
1756 /* Select the frame down one or COUNT stack levels
1757 from the previously selected frame, and print it briefly. */
1760 down_silently_base (char *count_exp
)
1762 struct frame_info
*frame
;
1763 int count
= -1, count1
;
1765 count
= -parse_and_eval_long (count_exp
);
1768 frame
= find_relative_frame (get_selected_frame ("No stack."), &count1
);
1769 if (count1
!= 0 && count_exp
== 0)
1772 /* We only do this if count_exp is not specified. That way "down"
1773 means to really go down (and let me know if that is
1774 impossible), but "down 9999" can be used to mean go all the way
1775 down without getting an error. */
1777 error (_("Bottom (i.e., innermost) frame selected; you cannot go down."));
1780 select_frame (frame
);
1784 down_silently_command (char *count_exp
, int from_tty
)
1786 down_silently_base (count_exp
);
1790 down_command (char *count_exp
, int from_tty
)
1792 down_silently_base (count_exp
);
1793 print_stack_frame (get_selected_frame (NULL
), 1, SRC_AND_LOC
);
1797 return_command (char *retval_exp
, int from_tty
)
1799 struct symbol
*thisfun
;
1800 struct value
*return_value
= NULL
;
1801 const char *query_prefix
= "";
1803 thisfun
= get_frame_function (get_selected_frame ("No selected frame."));
1805 /* Compute the return value. If the computation triggers an error,
1806 let it bail. If the return type can't be handled, set
1807 RETURN_VALUE to NULL, and QUERY_PREFIX to an informational
1811 struct type
*return_type
= NULL
;
1813 /* Compute the return value. Should the computation fail, this
1814 call throws an error. */
1815 return_value
= parse_and_eval (retval_exp
);
1817 /* Cast return value to the return type of the function. Should
1818 the cast fail, this call throws an error. */
1819 if (thisfun
!= NULL
)
1820 return_type
= TYPE_TARGET_TYPE (SYMBOL_TYPE (thisfun
));
1821 if (return_type
== NULL
)
1822 return_type
= builtin_type_int
;
1823 CHECK_TYPEDEF (return_type
);
1824 return_value
= value_cast (return_type
, return_value
);
1826 /* Make sure the value is fully evaluated. It may live in the
1827 stack frame we're about to pop. */
1828 if (value_lazy (return_value
))
1829 value_fetch_lazy (return_value
);
1831 if (TYPE_CODE (return_type
) == TYPE_CODE_VOID
)
1832 /* If the return-type is "void", don't try to find the
1833 return-value's location. However, do still evaluate the
1834 return expression so that, even when the expression result
1835 is discarded, side effects such as "return i++" still
1837 return_value
= NULL
;
1838 /* FIXME: cagney/2004-01-17: If the architecture implements both
1839 return_value and extract_returned_value_address, should allow
1840 "return" to work - don't set return_value to NULL. */
1841 else if (!gdbarch_return_value_p (current_gdbarch
)
1842 && (TYPE_CODE (return_type
) == TYPE_CODE_STRUCT
1843 || TYPE_CODE (return_type
) == TYPE_CODE_UNION
))
1845 /* NOTE: cagney/2003-10-20: Compatibility hack for legacy
1846 code. Old architectures don't expect STORE_RETURN_VALUE
1847 to be called with with a small struct that needs to be
1848 stored in registers. Don't start doing it now. */
1850 A structure or union return type is not supported by this architecture.\n\
1851 If you continue, the return value that you specified will be ignored.\n";
1852 return_value
= NULL
;
1854 else if (using_struct_return (return_type
, 0))
1857 The location at which to store the function's return value is unknown.\n\
1858 If you continue, the return value that you specified will be ignored.\n";
1859 return_value
= NULL
;
1863 /* Does an interactive user really want to do this? Include
1864 information, such as how well GDB can handle the return value, in
1865 the query message. */
1869 if (thisfun
== NULL
)
1870 confirmed
= query (_("%sMake selected stack frame return now? "),
1873 confirmed
= query (_("%sMake %s return now? "), query_prefix
,
1874 SYMBOL_PRINT_NAME (thisfun
));
1876 error (_("Not confirmed"));
1879 /* NOTE: cagney/2003-01-18: Is this silly? Rather than pop each
1880 frame in turn, should this code just go straight to the relevant
1881 frame and pop that? */
1883 /* First discard all frames inner-to the selected frame (making the
1884 selected frame current). */
1886 struct frame_id selected_id
= get_frame_id (get_selected_frame (NULL
));
1887 while (!frame_id_eq (selected_id
, get_frame_id (get_current_frame ())))
1889 if (frame_id_inner (selected_id
, get_frame_id (get_current_frame ())))
1890 /* Caught in the safety net, oops! We've gone way past the
1892 error (_("Problem while popping stack frames (corrupt stack?)"));
1893 frame_pop (get_current_frame ());
1897 /* Second discard the selected frame (which is now also the current
1899 frame_pop (get_current_frame ());
1901 /* Store RETURN_VAUE in the just-returned register set. */
1902 if (return_value
!= NULL
)
1904 struct type
*return_type
= value_type (return_value
);
1905 gdb_assert (gdbarch_return_value (current_gdbarch
, return_type
,
1907 == RETURN_VALUE_REGISTER_CONVENTION
);
1908 gdbarch_return_value (current_gdbarch
, return_type
,
1909 current_regcache
, NULL
/*read*/,
1910 value_contents (return_value
) /*write*/);
1913 /* If we are at the end of a call dummy now, pop the dummy frame
1915 if (get_frame_type (get_current_frame ()) == DUMMY_FRAME
)
1916 frame_pop (get_current_frame ());
1918 /* If interactive, print the frame that is now current. */
1920 frame_command ("0", 1);
1922 select_frame_command ("0", 0);
1925 /* Sets the scope to input function name, provided that the
1926 function is within the current stack frame */
1928 struct function_bounds
1930 CORE_ADDR low
, high
;
1933 static void func_command (char *arg
, int from_tty
);
1935 func_command (char *arg
, int from_tty
)
1937 struct frame_info
*fp
;
1939 struct symtabs_and_lines sals
;
1942 struct function_bounds
*func_bounds
= (struct function_bounds
*) NULL
;
1944 if (arg
!= (char *) NULL
)
1947 fp
= parse_frame_specification ("0");
1948 sals
= decode_line_spec (arg
, 1);
1949 func_bounds
= (struct function_bounds
*) xmalloc (
1950 sizeof (struct function_bounds
) * sals
.nelts
);
1951 for (i
= 0; (i
< sals
.nelts
&& !found
); i
++)
1953 if (sals
.sals
[i
].pc
== (CORE_ADDR
) 0 ||
1954 find_pc_partial_function (sals
.sals
[i
].pc
,
1956 &func_bounds
[i
].low
,
1957 &func_bounds
[i
].high
) == 0)
1959 func_bounds
[i
].low
=
1960 func_bounds
[i
].high
= (CORE_ADDR
) NULL
;
1966 for (i
= 0; (i
< sals
.nelts
&& !found
); i
++)
1967 found
= (get_frame_pc (fp
) >= func_bounds
[i
].low
&&
1968 get_frame_pc (fp
) < func_bounds
[i
].high
);
1972 fp
= find_relative_frame (fp
, &level
);
1975 while (!found
&& level
== 0);
1978 xfree (func_bounds
);
1981 printf_filtered (_("'%s' not within current stack frame.\n"), arg
);
1982 else if (fp
!= deprecated_selected_frame
)
1983 select_and_print_frame (fp
);
1986 /* Gets the language of the current frame. */
1989 get_frame_language (void)
1992 enum language flang
; /* The language of the current frame */
1994 if (deprecated_selected_frame
)
1996 /* We determine the current frame language by looking up its
1997 associated symtab. To retrieve this symtab, we use the frame PC.
1998 However we cannot use the frame pc as is, because it usually points
1999 to the instruction following the "call", which is sometimes the first
2000 instruction of another function. So we rely on
2001 get_frame_address_in_block(), it provides us with a PC which is
2002 guaranteed to be inside the frame's code block. */
2003 s
= find_pc_symtab (get_frame_address_in_block (deprecated_selected_frame
));
2005 flang
= s
->language
;
2007 flang
= language_unknown
;
2010 flang
= language_unknown
;
2016 _initialize_stack (void)
2019 backtrace_limit
= 30;
2022 add_com ("return", class_stack
, return_command
, _("\
2023 Make selected stack frame return to its caller.\n\
2024 Control remains in the debugger, but when you continue\n\
2025 execution will resume in the frame above the one now selected.\n\
2026 If an argument is given, it is an expression for the value to return."));
2028 add_com ("up", class_stack
, up_command
, _("\
2029 Select and print stack frame that called this one.\n\
2030 An argument says how many frames up to go."));
2031 add_com ("up-silently", class_support
, up_silently_command
, _("\
2032 Same as the `up' command, but does not print anything.\n\
2033 This is useful in command scripts."));
2035 add_com ("down", class_stack
, down_command
, _("\
2036 Select and print stack frame called by this one.\n\
2037 An argument says how many frames down to go."));
2038 add_com_alias ("do", "down", class_stack
, 1);
2039 add_com_alias ("dow", "down", class_stack
, 1);
2040 add_com ("down-silently", class_support
, down_silently_command
, _("\
2041 Same as the `down' command, but does not print anything.\n\
2042 This is useful in command scripts."));
2044 add_com ("frame", class_stack
, frame_command
, _("\
2045 Select and print a stack frame.\n\
2046 With no argument, print the selected stack frame. (See also \"info frame\").\n\
2047 An argument specifies the frame to select.\n\
2048 It can be a stack frame number or the address of the frame.\n\
2049 With argument, nothing is printed if input is coming from\n\
2050 a command file or a user-defined command."));
2052 add_com_alias ("f", "frame", class_stack
, 1);
2056 add_com ("L", class_stack
, current_frame_command
,
2057 _("Print the current stack frame.\n"));
2058 add_com_alias ("V", "frame", class_stack
, 1);
2060 add_com ("select-frame", class_stack
, select_frame_command
, _("\
2061 Select a stack frame without printing anything.\n\
2062 An argument specifies the frame to select.\n\
2063 It can be a stack frame number or the address of the frame.\n"));
2065 add_com ("backtrace", class_stack
, backtrace_command
, _("\
2066 Print backtrace of all stack frames, or innermost COUNT frames.\n\
2067 With a negative argument, print outermost -COUNT frames.\n\
2068 Use of the 'full' qualifier also prints the values of the local variables.\n"));
2069 add_com_alias ("bt", "backtrace", class_stack
, 0);
2072 add_com_alias ("t", "backtrace", class_stack
, 0);
2073 add_com ("T", class_stack
, backtrace_full_command
, _("\
2074 Print backtrace of all stack frames, or innermost COUNT frames \n\
2075 and the values of the local variables.\n\
2076 With a negative argument, print outermost -COUNT frames.\n\
2077 Usage: T <count>\n"));
2080 add_com_alias ("where", "backtrace", class_alias
, 0);
2081 add_info ("stack", backtrace_command
,
2082 _("Backtrace of the stack, or innermost COUNT frames."));
2083 add_info_alias ("s", "stack", 1);
2084 add_info ("frame", frame_info
,
2085 _("All about selected stack frame, or frame at ADDR."));
2086 add_info_alias ("f", "frame", 1);
2087 add_info ("locals", locals_info
,
2088 _("Local variables of current stack frame."));
2089 add_info ("args", args_info
,
2090 _("Argument variables of current stack frame."));
2092 add_com ("l", class_info
, args_plus_locals_info
,
2093 _("Argument and local variables of current stack frame."));
2096 add_com ("func", class_stack
, func_command
, _("\
2097 Select the stack frame that contains <func>.\n\
2098 Usage: func <name>\n"));
2100 add_info ("catch", catch_info
,
2101 _("Exceptions that can be caught in the current stack frame."));
2104 add_cmd ("backtrace-limit", class_stack
, set_backtrace_limit_command
, _(\
2105 "Specify maximum number of frames for \"backtrace\" to print by default."),
2107 add_info ("backtrace-limit", backtrace_limit_info
, _("\
2108 The maximum number of frames for \"backtrace\" to print by default."));