1 /* Print and select stack frames for GDB, the GNU debugger.
2 Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
3 1996, 1997, 1998, 1999, 2000, 2001 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
24 #include "gdb_string.h"
28 #include "expression.h"
34 #include "breakpoint.h"
42 /* Prototypes for exported functions. */
44 void args_info (char *, int);
46 void locals_info (char *, int);
48 void (*selected_frame_level_changed_hook
) (int);
50 void _initialize_stack (void);
52 /* Prototypes for local functions. */
54 static void return_command (char *, int);
56 static void down_command (char *, int);
58 static void down_silently_base (char *);
60 static void down_silently_command (char *, int);
62 static void up_command (char *, int);
64 static void up_silently_base (char *);
66 static void up_silently_command (char *, int);
68 void frame_command (char *, int);
70 static void current_frame_command (char *, int);
72 static void select_frame_command (char *, int);
74 static void print_frame_arg_vars (struct frame_info
*, struct ui_file
*);
76 static void catch_info (char *, int);
78 static void args_plus_locals_info (char *, int);
80 static void print_frame_label_vars (struct frame_info
*, int,
83 static void print_frame_local_vars (struct frame_info
*, int,
86 static int print_block_frame_labels (struct block
*, int *,
89 static int print_block_frame_locals (struct block
*,
94 static void print_frame (struct frame_info
*fi
,
98 struct symtab_and_line sal
);
100 static void print_frame_info_base (struct frame_info
*, int, int, int);
102 static void print_stack_frame_base (struct frame_info
*, int, int);
104 static void backtrace_command (char *, int);
106 struct frame_info
*parse_frame_specification (char *);
108 static void frame_info (char *, int);
110 extern int addressprint
; /* Print addresses, or stay symbolic only? */
111 extern int info_verbose
; /* Verbosity of symbol reading msgs */
112 extern int lines_to_list
; /* # of lines "list" command shows by default */
114 /* The "selected" stack frame is used by default for local and arg access.
115 May be zero, for no selected frame. */
117 struct frame_info
*selected_frame
;
119 /* Level of the selected frame:
120 0 for innermost, 1 for its caller, ...
121 or -1 for frame specified by address with no defined level. */
123 int selected_frame_level
;
125 /* Zero means do things normally; we are interacting directly with the
126 user. One means print the full filename and linenumber when a
127 frame is printed, and do so in a format emacs18/emacs19.22 can
128 parse. Two means print similar annotations, but in many more
129 cases and in a slightly different syntax. */
131 int annotation_level
= 0;
134 struct print_stack_frame_args
136 struct frame_info
*fi
;
142 static int print_stack_frame_base_stub (char *);
144 /* Show and print the frame arguments.
145 Pass the args the way catch_errors wants them. */
146 static int show_and_print_stack_frame_stub (void *args
);
148 show_and_print_stack_frame_stub (void *args
)
150 struct print_stack_frame_args
*p
= (struct print_stack_frame_args
*) args
;
152 print_frame_info (p
->fi
, p
->level
, p
->source
, p
->args
);
157 /* Show or print the frame arguments.
158 Pass the args the way catch_errors wants them. */
159 static int print_stack_frame_stub (void *args
);
161 print_stack_frame_stub (void *args
)
163 struct print_stack_frame_args
*p
= (struct print_stack_frame_args
*) args
;
165 print_frame_info_base (p
->fi
, p
->level
, p
->source
, p
->args
);
169 /* Print a stack frame briefly. FRAME_INFI should be the frame info
170 and LEVEL should be its level in the stack (or -1 for level not
173 /* Pass the args the way catch_errors wants them. */
175 print_stack_frame_base_stub (char *args
)
177 struct print_stack_frame_args
*p
= (struct print_stack_frame_args
*) args
;
179 print_frame_info_base (p
->fi
, p
->level
, p
->source
, p
->args
);
183 /* print the frame arguments to the terminal.
184 Pass the args the way catch_errors wants them. */
185 static int print_only_stack_frame_stub (void *);
187 print_only_stack_frame_stub (void *args
)
189 struct print_stack_frame_args
*p
= (struct print_stack_frame_args
*) args
;
191 print_frame_info_base (p
->fi
, p
->level
, p
->source
, p
->args
);
195 /* Print a stack frame briefly. FRAME_INFI should be the frame info
196 and LEVEL should be its level in the stack (or -1 for level not defined).
197 This prints the level, the function executing, the arguments,
198 and the file name and line number.
199 If the pc is not at the beginning of the source line,
200 the actual pc is printed at the beginning.
202 If SOURCE is 1, print the source line as well.
203 If SOURCE is -1, print ONLY the source line. */
206 print_stack_frame_base (struct frame_info
*fi
, int level
, int source
)
208 struct print_stack_frame_args args
;
212 args
.source
= source
;
215 catch_errors (print_stack_frame_stub
, &args
, "", RETURN_MASK_ALL
);
218 /* Show and print a stack frame briefly. FRAME_INFI should be the frame info
219 and LEVEL should be its level in the stack (or -1 for level not defined).
220 This prints the level, the function executing, the arguments,
221 and the file name and line number.
222 If the pc is not at the beginning of the source line,
223 the actual pc is printed at the beginning.
225 If SOURCE is 1, print the source line as well.
226 If SOURCE is -1, print ONLY the source line. */
229 show_and_print_stack_frame (struct frame_info
*fi
, int level
, int source
)
231 struct print_stack_frame_args args
;
235 args
.source
= source
;
238 catch_errors (show_and_print_stack_frame_stub
, &args
, "", RETURN_MASK_ALL
);
242 /* Show or print a stack frame briefly. FRAME_INFI should be the frame info
243 and LEVEL should be its level in the stack (or -1 for level not defined).
244 This prints the level, the function executing, the arguments,
245 and the file name and line number.
246 If the pc is not at the beginning of the source line,
247 the actual pc is printed at the beginning.
249 If SOURCE is 1, print the source line as well.
250 If SOURCE is -1, print ONLY the source line. */
253 print_stack_frame (struct frame_info
*fi
, int level
, int source
)
255 struct print_stack_frame_args args
;
259 args
.source
= source
;
262 catch_errors (print_stack_frame_stub
, (char *) &args
, "", RETURN_MASK_ALL
);
265 /* Print a stack frame briefly. FRAME_INFI should be the frame info
266 and LEVEL should be its level in the stack (or -1 for level not defined).
267 This prints the level, the function executing, the arguments,
268 and the file name and line number.
269 If the pc is not at the beginning of the source line,
270 the actual pc is printed at the beginning.
272 If SOURCE is 1, print the source line as well.
273 If SOURCE is -1, print ONLY the source line. */
276 print_only_stack_frame (struct frame_info
*fi
, int level
, int source
)
278 struct print_stack_frame_args args
;
282 args
.source
= source
;
285 catch_errors (print_only_stack_frame_stub
, &args
, "", RETURN_MASK_ALL
);
288 struct print_args_args
291 struct frame_info
*fi
;
292 struct ui_file
*stream
;
295 static int print_args_stub (PTR
);
297 /* Pass the args the way catch_errors wants them. */
300 print_args_stub (PTR args
)
303 struct print_args_args
*p
= (struct print_args_args
*) args
;
305 numargs
= FRAME_NUM_ARGS (p
->fi
);
306 print_frame_args (p
->func
, p
->fi
, numargs
, p
->stream
);
310 /* Print information about a frame for frame "fi" at level "level".
311 Used in "where" output, also used to emit breakpoint or step
313 LEVEL is the level of the frame, or -1 if it is the
314 innermost frame but we don't want to print the level.
315 The meaning of the SOURCE argument is:
316 SRC_LINE: Print only source line
317 LOCATION: Print only location
318 LOC_AND_SRC: Print location and source line. */
321 print_frame_info_base (struct frame_info
*fi
, int level
, int source
, int args
)
323 struct symtab_and_line sal
;
328 char buf
[MAX_REGISTER_RAW_SIZE
];
331 /* On the 68k, this spends too much time in m68k_find_saved_regs. */
333 /* Get the value of SP_REGNUM relative to the frame. */
334 get_saved_register (buf
, (int *) NULL
, (CORE_ADDR
*) NULL
,
335 FRAME_INFO_ID (fi
), SP_REGNUM
, (enum lval_type
*) NULL
);
336 sp
= extract_address (buf
, REGISTER_RAW_SIZE (SP_REGNUM
));
338 /* This is not a perfect test, because if a function alloca's some
339 memory, puts some code there, and then jumps into it, then the test
340 will succeed even though there is no call dummy. Probably best is
341 to check for a bp_call_dummy breakpoint. */
342 if (PC_IN_CALL_DUMMY (fi
->pc
, sp
, fi
->frame
))
344 if (frame_in_dummy (fi
))
347 annotate_frame_begin (level
== -1 ? 0 : level
, fi
->pc
);
349 /* Do this regardless of SOURCE because we don't have any source
350 to list for this frame. */
352 printf_filtered ("#%-2d ", level
);
353 annotate_function_call ();
354 printf_filtered ("<function called from gdb>\n");
355 annotate_frame_end ();
358 if (fi
->signal_handler_caller
)
360 annotate_frame_begin (level
== -1 ? 0 : level
, fi
->pc
);
362 /* Do this regardless of SOURCE because we don't have any source
363 to list for this frame. */
365 printf_filtered ("#%-2d ", level
);
366 annotate_signal_handler_caller ();
367 printf_filtered ("<signal handler called>\n");
368 annotate_frame_end ();
372 /* If fi is not the innermost frame, that normally means that fi->pc
373 points to *after* the call instruction, and we want to get the line
374 containing the call, never the next line. But if the next frame is
375 a signal_handler_caller or a dummy frame, then the next frame was
376 not entered as the result of a call, and we want to get the line
377 containing fi->pc. */
379 find_pc_line (fi
->pc
,
381 && !fi
->next
->signal_handler_caller
382 && !frame_in_dummy (fi
->next
));
384 location_print
= (source
== LOCATION
385 || source
== LOC_AND_ADDRESS
386 || source
== SRC_AND_LOC
);
388 if (location_print
|| !sal
.symtab
)
389 print_frame (fi
, level
, source
, args
, sal
);
391 source_print
= (source
== SRC_LINE
|| source
== SRC_AND_LOC
);
393 if (source_print
&& sal
.symtab
)
396 int mid_statement
= (source
== SRC_LINE
) && (fi
->pc
!= sal
.pc
);
398 if (annotation_level
)
399 done
= identify_source_line (sal
.symtab
, sal
.line
, mid_statement
,
403 if (addressprint
&& mid_statement
)
406 ui_out_field_core_addr (uiout
, "addr", fi
->pc
);
407 ui_out_text (uiout
, "\t");
409 print_address_numeric (fi
->pc
, 1, gdb_stdout
);
410 printf_filtered ("\t");
413 if (print_frame_info_listing_hook
)
414 print_frame_info_listing_hook (sal
.symtab
, sal
.line
, sal
.line
+ 1, 0);
416 print_source_lines (sal
.symtab
, sal
.line
, sal
.line
+ 1, 0);
418 current_source_line
= max (sal
.line
- lines_to_list
/ 2, 1);
422 set_default_breakpoint (1, fi
->pc
, sal
.symtab
, sal
.line
);
424 annotate_frame_end ();
426 gdb_flush (gdb_stdout
);
430 print_frame (struct frame_info
*fi
,
434 struct symtab_and_line sal
)
437 register char *funname
= 0;
438 enum language funlang
= language_unknown
;
440 struct ui_stream
*stb
;
441 struct cleanup
*old_chain
;
442 struct cleanup
*list_chain
;
444 stb
= ui_out_stream_new (uiout
);
445 old_chain
= make_cleanup_ui_out_stream_delete (stb
);
448 func
= find_pc_function (fi
->pc
);
451 /* In certain pathological cases, the symtabs give the wrong
452 function (when we are in the first function in a file which
453 is compiled without debugging symbols, the previous function
454 is compiled with debugging symbols, and the "foo.o" symbol
455 that is supposed to tell us where the file with debugging symbols
456 ends has been truncated by ar because it is longer than 15
457 characters). This also occurs if the user uses asm() to create
458 a function but not stabs for it (in a file compiled -g).
460 So look in the minimal symbol tables as well, and if it comes
461 up with a larger address for the function use that instead.
462 I don't think this can ever cause any problems; there shouldn't
463 be any minimal symbols in the middle of a function; if this is
464 ever changed many parts of GDB will need to be changed (and we'll
465 create a find_pc_minimal_function or some such). */
467 struct minimal_symbol
*msymbol
= lookup_minimal_symbol_by_pc (fi
->pc
);
469 && (SYMBOL_VALUE_ADDRESS (msymbol
)
470 > BLOCK_START (SYMBOL_BLOCK_VALUE (func
))))
473 /* There is no particular reason to think the line number
474 information is wrong. Someone might have just put in
475 a label with asm() but left the line numbers alone. */
476 /* In this case we have no way of knowing the source file
477 and line number, so don't print them. */
480 /* We also don't know anything about the function besides
481 its address and name. */
483 funname
= SYMBOL_NAME (msymbol
);
484 funlang
= SYMBOL_LANGUAGE (msymbol
);
488 /* I'd like to use SYMBOL_SOURCE_NAME() here, to display the
489 demangled name that we already have stored in the symbol
490 table, but we stored a version with DMGL_PARAMS turned
491 on, and here we don't want to display parameters. So call
492 the demangler again, with DMGL_ANSI only. (Yes, I know
493 that printf_symbol_filtered() will again try to demangle
494 the name on the fly, but the issue is that if
495 cplus_demangle() fails here, it'll fail there too. So we
496 want to catch the failure ("demangled==NULL" case below)
497 here, while we still have our hands on the function
500 funname
= SYMBOL_NAME (func
);
501 funlang
= SYMBOL_LANGUAGE (func
);
502 if (funlang
== language_cplus
)
504 demangled
= cplus_demangle (funname
, DMGL_ANSI
);
505 if (demangled
== NULL
)
506 /* If the demangler fails, try the demangled name from
507 the symbol table. This'll have parameters, but
508 that's preferable to diplaying a mangled name. */
509 funname
= SYMBOL_SOURCE_NAME (func
);
515 struct minimal_symbol
*msymbol
= lookup_minimal_symbol_by_pc (fi
->pc
);
518 funname
= SYMBOL_NAME (msymbol
);
519 funlang
= SYMBOL_LANGUAGE (msymbol
);
523 annotate_frame_begin (level
== -1 ? 0 : level
, fi
->pc
);
526 list_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "frame");
532 ui_out_text (uiout
, "#");
533 ui_out_field_fmt (uiout
, "level", "%-2d", level
);
534 ui_out_spaces (uiout
, 1);
536 printf_filtered ("#%-2d ", level
);
540 if (fi
->pc
!= sal
.pc
|| !sal
.symtab
|| source
== LOC_AND_ADDRESS
)
542 annotate_frame_address ();
544 ui_out_field_core_addr (uiout
, "addr", fi
->pc
);
545 annotate_frame_address_end ();
546 ui_out_text (uiout
, " in ");
548 print_address_numeric (fi
->pc
, 1, gdb_stdout
);
549 annotate_frame_address_end ();
550 printf_filtered (" in ");
553 annotate_frame_function_name ();
555 fprintf_symbol_filtered (stb
->stream
, funname
? funname
: "??", funlang
,
557 ui_out_field_stream (uiout
, "func", stb
);
558 ui_out_wrap_hint (uiout
, " ");
560 fprintf_symbol_filtered (gdb_stdout
, funname
? funname
: "??", funlang
,
564 annotate_frame_args ();
567 ui_out_text (uiout
, " (");
569 fputs_filtered (" (", gdb_stdout
);
573 struct print_args_args args
;
575 struct cleanup
*args_list_chain
;
579 args
.stream
= gdb_stdout
;
581 args_list_chain
= make_cleanup_ui_out_list_begin_end (uiout
, "args");
582 catch_errors (print_args_stub
, &args
, "", RETURN_MASK_ALL
);
583 /* FIXME: args must be a list. If one argument is a string it will
584 have " that will not be properly escaped. */
585 /* Invoke ui_out_tuple_end. */
586 do_cleanups (args_list_chain
);
588 catch_errors (print_args_stub
, &args
, "", RETURN_MASK_ALL
);
593 ui_out_text (uiout
, ")");
595 printf_filtered (")");
597 if (sal
.symtab
&& sal
.symtab
->filename
)
599 annotate_frame_source_begin ();
601 ui_out_wrap_hint (uiout
, " ");
602 ui_out_text (uiout
, " at ");
603 annotate_frame_source_file ();
604 ui_out_field_string (uiout
, "file", sal
.symtab
->filename
);
605 annotate_frame_source_file_end ();
606 ui_out_text (uiout
, ":");
607 annotate_frame_source_line ();
608 ui_out_field_int (uiout
, "line", sal
.line
);
611 printf_filtered (" at ");
612 annotate_frame_source_file ();
613 printf_filtered ("%s", sal
.symtab
->filename
);
614 annotate_frame_source_file_end ();
615 printf_filtered (":");
616 annotate_frame_source_line ();
617 printf_filtered ("%d", sal
.line
);
619 annotate_frame_source_end ();
623 if (!funname
|| (!sal
.symtab
|| !sal
.symtab
->filename
))
625 char *lib
= PC_SOLIB (fi
->pc
);
628 annotate_frame_where ();
630 ui_out_wrap_hint (uiout
, " ");
631 ui_out_text (uiout
, " from ");
632 ui_out_field_string (uiout
, "from", lib
);
635 printf_filtered (" from %s", lib
);
639 #endif /* PC_SOLIB */
642 /* do_cleanups will call ui_out_tuple_end() for us. */
643 do_cleanups (list_chain
);
644 ui_out_text (uiout
, "\n");
645 do_cleanups (old_chain
);
647 printf_filtered ("\n");
652 /* Show or print the frame info. If this is the tui, it will be shown in
653 the source display */
655 print_frame_info (struct frame_info
*fi
, register int level
, int source
,
658 print_frame_info_base (fi
, level
, source
, args
);
661 /* Show the frame info. If this is the tui, it will be shown in
662 the source display otherwise, nothing is done */
664 show_stack_frame (struct frame_info
*fi
)
669 /* Read a frame specification in whatever the appropriate format is.
670 Call error() if the specification is in any way invalid (i.e.
671 this function never returns NULL). */
674 parse_frame_specification (char *frame_exp
)
678 CORE_ADDR args
[MAXARGS
];
683 char *addr_string
, *p
;
684 struct cleanup
*tmp_cleanup
;
686 while (*frame_exp
== ' ')
691 if (numargs
> MAXARGS
)
692 error ("Too many args in frame specification");
693 /* Parse an argument. */
694 for (p
= frame_exp
; *p
&& *p
!= ' '; p
++)
696 addr_string
= savestring (frame_exp
, p
- frame_exp
);
701 tmp_cleanup
= make_cleanup (xfree
, addr_string
);
703 /* NOTE: we call parse_and_eval and then both
704 value_as_long and value_as_address rather than calling
705 parse_and_eval_long and parse_and_eval_address because
706 of the issue of potential side effects from evaluating
708 vp
= parse_and_eval (addr_string
);
710 level
= value_as_long (vp
);
712 args
[numargs
++] = value_as_address (vp
);
713 do_cleanups (tmp_cleanup
);
716 /* Skip spaces, move to possible next arg. */
726 if (selected_frame
== NULL
)
727 error ("No selected frame.");
728 return selected_frame
;
732 struct frame_info
*fid
=
733 find_relative_frame (get_current_frame (), &level
);
734 struct frame_info
*tfid
;
737 /* find_relative_frame was successful */
740 /* If SETUP_ARBITRARY_FRAME is defined, then frame specifications
741 take at least 2 addresses. It is important to detect this case
742 here so that "frame 100" does not give a confusing error message
743 like "frame specification requires two addresses". This of course
744 does not solve the "frame 100" problem for machines on which
745 a frame specification can be made with one address. To solve
746 that, we need a new syntax for a specifying a frame by address.
747 I think the cleanest syntax is $frame(0x45) ($frame(0x23,0x45) for
748 two args, etc.), but people might think that is too much typing,
749 so I guess *0x23,0x45 would be a possible alternative (commas
750 really should be used instead of spaces to delimit; using spaces
751 normally works in an expression). */
752 #ifdef SETUP_ARBITRARY_FRAME
753 error ("No frame %d", args
[0]);
756 /* If (s)he specifies the frame with an address, he deserves what
757 (s)he gets. Still, give the highest one that matches. */
759 for (fid
= get_current_frame ();
760 fid
&& fid
->frame
!= args
[0];
761 fid
= get_prev_frame (fid
))
765 while ((tfid
= get_prev_frame (fid
)) &&
766 (tfid
->frame
== args
[0]))
769 /* We couldn't identify the frame as an existing frame, but
770 perhaps we can create one with a single argument. */
774 #ifdef SETUP_ARBITRARY_FRAME
775 return SETUP_ARBITRARY_FRAME (numargs
, args
);
777 /* Usual case. Do it here rather than have everyone supply
778 a SETUP_ARBITRARY_FRAME that does this. */
780 return create_new_frame (args
[0], 0);
781 error ("Too many args in frame specification");
788 /* FRAME_ARGS_ADDRESS_CORRECT is just like FRAME_ARGS_ADDRESS except
789 that if it is unsure about the answer, it returns 0
790 instead of guessing (this happens on the VAX and i960, for example).
792 On most machines, we never have to guess about the args address,
793 so FRAME_ARGS_ADDRESS{,_CORRECT} are the same. */
794 #if !defined (FRAME_ARGS_ADDRESS_CORRECT)
795 #define FRAME_ARGS_ADDRESS_CORRECT FRAME_ARGS_ADDRESS
798 /* Print verbosely the selected frame or the frame at address ADDR.
799 This means absolutely all information in the frame is printed. */
802 frame_info (char *addr_exp
, int from_tty
)
804 struct frame_info
*fi
;
805 struct symtab_and_line sal
;
808 struct frame_info
*calling_frame_info
;
809 int i
, count
, numregs
;
811 enum language funlang
= language_unknown
;
813 if (!target_has_stack
)
816 fi
= parse_frame_specification (addr_exp
);
818 error ("Invalid frame specified.");
820 sal
= find_pc_line (fi
->pc
,
822 && !fi
->next
->signal_handler_caller
823 && !frame_in_dummy (fi
->next
));
824 func
= get_frame_function (fi
);
825 s
= find_pc_symtab (fi
->pc
);
828 /* I'd like to use SYMBOL_SOURCE_NAME() here, to display
829 * the demangled name that we already have stored in
830 * the symbol table, but we stored a version with
831 * DMGL_PARAMS turned on, and here we don't want
832 * to display parameters. So call the demangler again,
833 * with DMGL_ANSI only. RT
834 * (Yes, I know that printf_symbol_filtered() will
835 * again try to demangle the name on the fly, but
836 * the issue is that if cplus_demangle() fails here,
837 * it'll fail there too. So we want to catch the failure
838 * ("demangled==NULL" case below) here, while we still
839 * have our hands on the function symbol.)
842 funname
= SYMBOL_NAME (func
);
843 funlang
= SYMBOL_LANGUAGE (func
);
844 if (funlang
== language_cplus
)
846 demangled
= cplus_demangle (funname
, DMGL_ANSI
);
847 /* If the demangler fails, try the demangled name
848 * from the symbol table. This'll have parameters,
849 * but that's preferable to diplaying a mangled name.
851 if (demangled
== NULL
)
852 funname
= SYMBOL_SOURCE_NAME (func
);
857 register struct minimal_symbol
*msymbol
= lookup_minimal_symbol_by_pc (fi
->pc
);
860 funname
= SYMBOL_NAME (msymbol
);
861 funlang
= SYMBOL_LANGUAGE (msymbol
);
864 calling_frame_info
= get_prev_frame (fi
);
866 if (!addr_exp
&& selected_frame_level
>= 0)
868 printf_filtered ("Stack level %d, frame at ", selected_frame_level
);
869 print_address_numeric (fi
->frame
, 1, gdb_stdout
);
870 printf_filtered (":\n");
874 printf_filtered ("Stack frame at ");
875 print_address_numeric (fi
->frame
, 1, gdb_stdout
);
876 printf_filtered (":\n");
878 printf_filtered (" %s = ", REGISTER_NAME (PC_REGNUM
));
879 print_address_numeric (fi
->pc
, 1, gdb_stdout
);
884 printf_filtered (" in ");
885 fprintf_symbol_filtered (gdb_stdout
, funname
, funlang
,
886 DMGL_ANSI
| DMGL_PARAMS
);
890 printf_filtered (" (%s:%d)", sal
.symtab
->filename
, sal
.line
);
891 puts_filtered ("; ");
893 printf_filtered ("saved %s ", REGISTER_NAME (PC_REGNUM
));
894 print_address_numeric (FRAME_SAVED_PC (fi
), 1, gdb_stdout
);
895 printf_filtered ("\n");
899 frameless
= FRAMELESS_FUNCTION_INVOCATION (fi
);
901 printf_filtered (" (FRAMELESS),");
904 if (calling_frame_info
)
906 printf_filtered (" called by frame at ");
907 print_address_numeric (calling_frame_info
->frame
, 1, gdb_stdout
);
909 if (fi
->next
&& calling_frame_info
)
914 printf_filtered (" caller of frame at ");
915 print_address_numeric (fi
->next
->frame
, 1, gdb_stdout
);
917 if (fi
->next
|| calling_frame_info
)
918 puts_filtered ("\n");
920 printf_filtered (" source language %s.\n", language_str (s
->language
));
922 #ifdef PRINT_EXTRA_FRAME_INFO
923 PRINT_EXTRA_FRAME_INFO (fi
);
927 /* Address of the argument list for this frame, or 0. */
928 CORE_ADDR arg_list
= FRAME_ARGS_ADDRESS_CORRECT (fi
);
929 /* Number of args for this frame, or -1 if unknown. */
933 printf_filtered (" Arglist at unknown address.\n");
936 printf_filtered (" Arglist at ");
937 print_address_numeric (arg_list
, 1, gdb_stdout
);
938 printf_filtered (",");
940 numargs
= FRAME_NUM_ARGS (fi
);
942 puts_filtered (" args: ");
943 else if (numargs
== 0)
944 puts_filtered (" no args.");
945 else if (numargs
== 1)
946 puts_filtered (" 1 arg: ");
948 printf_filtered (" %d args: ", numargs
);
949 print_frame_args (func
, fi
, numargs
, gdb_stdout
);
950 puts_filtered ("\n");
954 /* Address of the local variables for this frame, or 0. */
955 CORE_ADDR arg_list
= FRAME_LOCALS_ADDRESS (fi
);
958 printf_filtered (" Locals at unknown address,");
961 printf_filtered (" Locals at ");
962 print_address_numeric (arg_list
, 1, gdb_stdout
);
963 printf_filtered (",");
967 FRAME_INIT_SAVED_REGS (fi
);
968 if (fi
->saved_regs
!= NULL
)
970 /* The sp is special; what's returned isn't the save address, but
971 actually the value of the previous frame's sp. */
972 printf_filtered (" Previous frame's sp is ");
973 print_address_numeric (fi
->saved_regs
[SP_REGNUM
], 1, gdb_stdout
);
974 printf_filtered ("\n");
976 numregs
= NUM_REGS
+ NUM_PSEUDO_REGS
;
977 for (i
= 0; i
< numregs
; i
++)
978 if (fi
->saved_regs
[i
] && i
!= SP_REGNUM
)
981 puts_filtered (" Saved registers:\n ");
985 printf_filtered (" %s at ", REGISTER_NAME (i
));
986 print_address_numeric (fi
->saved_regs
[i
], 1, gdb_stdout
);
990 puts_filtered ("\n");
994 /* We could get some information about saved registers by
995 calling get_saved_register on each register. Which info goes
996 with which frame is necessarily lost, however, and I suspect
997 that the users don't care whether they get the info. */
998 puts_filtered ("\n");
1003 /* Set a limit on the number of frames printed by default in a
1006 static int backtrace_limit
;
1009 set_backtrace_limit_command (char *count_exp
, int from_tty
)
1011 int count
= parse_and_eval_long (count_exp
);
1014 error ("Negative argument not meaningful as backtrace limit.");
1016 backtrace_limit
= count
;
1020 backtrace_limit_info (char *arg
, int from_tty
)
1023 error ("\"Info backtrace-limit\" takes no arguments.");
1025 printf_unfiltered ("Backtrace limit: %d.\n", backtrace_limit
);
1029 /* Print briefly all stack frames or just the innermost COUNT frames. */
1031 static void backtrace_command_1 (char *count_exp
, int show_locals
,
1034 backtrace_command_1 (char *count_exp
, int show_locals
, int from_tty
)
1036 struct frame_info
*fi
;
1039 register struct frame_info
*trailing
;
1040 register int trailing_level
;
1042 if (!target_has_stack
)
1043 error ("No stack.");
1045 /* The following code must do two things. First, it must
1046 set the variable TRAILING to the frame from which we should start
1047 printing. Second, it must set the variable count to the number
1048 of frames which we should print, or -1 if all of them. */
1049 trailing
= get_current_frame ();
1051 /* The target can be in a state where there is no valid frames
1052 (e.g., just connected). */
1053 if (trailing
== NULL
)
1054 error ("No stack.");
1059 count
= parse_and_eval_long (count_exp
);
1062 struct frame_info
*current
;
1067 while (current
&& count
--)
1070 current
= get_prev_frame (current
);
1073 /* Will stop when CURRENT reaches the top of the stack. TRAILING
1074 will be COUNT below it. */
1078 trailing
= get_prev_frame (trailing
);
1079 current
= get_prev_frame (current
);
1091 struct partial_symtab
*ps
;
1093 /* Read in symbols for all of the frames. Need to do this in
1094 a separate pass so that "Reading in symbols for xxx" messages
1095 don't screw up the appearance of the backtrace. Also
1096 if people have strong opinions against reading symbols for
1097 backtrace this may have to be an option. */
1101 fi
= get_prev_frame (fi
))
1104 ps
= find_pc_psymtab (fi
->pc
);
1106 PSYMTAB_TO_SYMTAB (ps
); /* Force syms to come in */
1110 for (i
= 0, fi
= trailing
;
1112 i
++, fi
= get_prev_frame (fi
))
1116 /* Don't use print_stack_frame; if an error() occurs it probably
1117 means further attempts to backtrace would fail (on the other
1118 hand, perhaps the code does or could be fixed to make sure
1119 the frame->prev field gets set to NULL in that case). */
1120 print_frame_info_base (fi
, trailing_level
+ i
, 0, 1);
1122 print_frame_local_vars (fi
, 1, gdb_stdout
);
1125 /* If we've stopped before the end, mention that. */
1127 printf_filtered ("(More stack frames follow...)\n");
1131 backtrace_command (char *arg
, int from_tty
)
1133 struct cleanup
*old_chain
= (struct cleanup
*) NULL
;
1134 char **argv
= (char **) NULL
;
1135 int argIndicatingFullTrace
= (-1), totArgLen
= 0, argc
= 0;
1138 if (arg
!= (char *) NULL
)
1142 argv
= buildargv (arg
);
1143 old_chain
= make_cleanup_freeargv (argv
);
1145 for (i
= 0; (argv
[i
] != (char *) NULL
); i
++)
1149 for (j
= 0; (j
< strlen (argv
[i
])); j
++)
1150 argv
[i
][j
] = tolower (argv
[i
][j
]);
1152 if (argIndicatingFullTrace
< 0 && subset_compare (argv
[i
], "full"))
1153 argIndicatingFullTrace
= argc
;
1157 totArgLen
+= strlen (argv
[i
]);
1161 if (argIndicatingFullTrace
>= 0)
1165 argPtr
= (char *) xmalloc (totArgLen
+ 1);
1170 memset (argPtr
, 0, totArgLen
+ 1);
1171 for (i
= 0; (i
< (argc
+ 1)); i
++)
1173 if (i
!= argIndicatingFullTrace
)
1175 strcat (argPtr
, argv
[i
]);
1176 strcat (argPtr
, " ");
1182 argPtr
= (char *) NULL
;
1186 backtrace_command_1 (argPtr
, (argIndicatingFullTrace
>= 0), from_tty
);
1188 if (argIndicatingFullTrace
>= 0 && totArgLen
> 0)
1192 do_cleanups (old_chain
);
1195 static void backtrace_full_command (char *arg
, int from_tty
);
1197 backtrace_full_command (char *arg
, int from_tty
)
1199 backtrace_command_1 (arg
, 1, from_tty
);
1203 /* Print the local variables of a block B active in FRAME.
1204 Return 1 if any variables were printed; 0 otherwise. */
1207 print_block_frame_locals (struct block
*b
, register struct frame_info
*fi
,
1208 int num_tabs
, register struct ui_file
*stream
)
1211 register struct symbol
*sym
;
1212 register int values_printed
= 0;
1214 ALL_BLOCK_SYMBOLS (b
, i
, sym
)
1216 switch (SYMBOL_CLASS (sym
))
1223 for (j
= 0; j
< num_tabs
; j
++)
1224 fputs_filtered ("\t", stream
);
1225 fputs_filtered (SYMBOL_SOURCE_NAME (sym
), stream
);
1226 fputs_filtered (" = ", stream
);
1227 print_variable_value (sym
, fi
, stream
);
1228 fprintf_filtered (stream
, "\n");
1232 /* Ignore symbols which are not locals. */
1236 return values_printed
;
1239 /* Same, but print labels. */
1242 print_block_frame_labels (struct block
*b
, int *have_default
,
1243 register struct ui_file
*stream
)
1246 register struct symbol
*sym
;
1247 register int values_printed
= 0;
1249 ALL_BLOCK_SYMBOLS (b
, i
, sym
)
1251 if (STREQ (SYMBOL_NAME (sym
), "default"))
1257 if (SYMBOL_CLASS (sym
) == LOC_LABEL
)
1259 struct symtab_and_line sal
;
1260 sal
= find_pc_line (SYMBOL_VALUE_ADDRESS (sym
), 0);
1262 fputs_filtered (SYMBOL_SOURCE_NAME (sym
), stream
);
1265 fprintf_filtered (stream
, " ");
1266 print_address_numeric (SYMBOL_VALUE_ADDRESS (sym
), 1, stream
);
1268 fprintf_filtered (stream
, " in file %s, line %d\n",
1269 sal
.symtab
->filename
, sal
.line
);
1272 return values_printed
;
1275 /* Print on STREAM all the local variables in frame FRAME,
1276 including all the blocks active in that frame
1279 Returns 1 if the job was done,
1280 or 0 if nothing was printed because we have no info
1281 on the function running in FRAME. */
1284 print_frame_local_vars (register struct frame_info
*fi
, register int num_tabs
,
1285 register struct ui_file
*stream
)
1287 register struct block
*block
= get_frame_block (fi
);
1288 register int values_printed
= 0;
1292 fprintf_filtered (stream
, "No symbol table info available.\n");
1298 if (print_block_frame_locals (block
, fi
, num_tabs
, stream
))
1300 /* After handling the function's top-level block, stop.
1301 Don't continue to its superblock, the block of
1302 per-file symbols. */
1303 if (BLOCK_FUNCTION (block
))
1305 block
= BLOCK_SUPERBLOCK (block
);
1308 if (!values_printed
)
1310 fprintf_filtered (stream
, "No locals.\n");
1314 /* Same, but print labels. */
1317 print_frame_label_vars (register struct frame_info
*fi
, int this_level_only
,
1318 register struct ui_file
*stream
)
1320 register struct blockvector
*bl
;
1321 register struct block
*block
= get_frame_block (fi
);
1322 register int values_printed
= 0;
1323 int index
, have_default
= 0;
1324 char *blocks_printed
;
1325 CORE_ADDR pc
= fi
->pc
;
1329 fprintf_filtered (stream
, "No symbol table info available.\n");
1333 bl
= blockvector_for_pc (BLOCK_END (block
) - 4, &index
);
1334 blocks_printed
= (char *) alloca (BLOCKVECTOR_NBLOCKS (bl
) * sizeof (char));
1335 memset (blocks_printed
, 0, BLOCKVECTOR_NBLOCKS (bl
) * sizeof (char));
1339 CORE_ADDR end
= BLOCK_END (block
) - 4;
1342 if (bl
!= blockvector_for_pc (end
, &index
))
1343 error ("blockvector blotch");
1344 if (BLOCKVECTOR_BLOCK (bl
, index
) != block
)
1345 error ("blockvector botch");
1346 last_index
= BLOCKVECTOR_NBLOCKS (bl
);
1349 /* Don't print out blocks that have gone by. */
1350 while (index
< last_index
1351 && BLOCK_END (BLOCKVECTOR_BLOCK (bl
, index
)) < pc
)
1354 while (index
< last_index
1355 && BLOCK_END (BLOCKVECTOR_BLOCK (bl
, index
)) < end
)
1357 if (blocks_printed
[index
] == 0)
1359 if (print_block_frame_labels (BLOCKVECTOR_BLOCK (bl
, index
), &have_default
, stream
))
1361 blocks_printed
[index
] = 1;
1367 if (values_printed
&& this_level_only
)
1370 /* After handling the function's top-level block, stop.
1371 Don't continue to its superblock, the block of
1372 per-file symbols. */
1373 if (BLOCK_FUNCTION (block
))
1375 block
= BLOCK_SUPERBLOCK (block
);
1378 if (!values_printed
&& !this_level_only
)
1380 fprintf_filtered (stream
, "No catches.\n");
1386 locals_info (char *args
, int from_tty
)
1388 if (!selected_frame
)
1389 error ("No frame selected.");
1390 print_frame_local_vars (selected_frame
, 0, gdb_stdout
);
1394 catch_info (char *ignore
, int from_tty
)
1396 struct symtab_and_line
*sal
;
1398 /* Check for target support for exception handling */
1399 sal
= target_enable_exception_callback (EX_EVENT_CATCH
, 1);
1402 /* Currently not handling this */
1403 /* Ideally, here we should interact with the C++ runtime
1404 system to find the list of active handlers, etc. */
1405 fprintf_filtered (gdb_stdout
, "Info catch not supported with this target/compiler combination.\n");
1407 if (!selected_frame
)
1408 error ("No frame selected.");
1413 /* Assume g++ compiled code -- old v 4.16 behaviour */
1414 if (!selected_frame
)
1415 error ("No frame selected.");
1417 print_frame_label_vars (selected_frame
, 0, gdb_stdout
);
1422 print_frame_arg_vars (register struct frame_info
*fi
,
1423 register struct ui_file
*stream
)
1425 struct symbol
*func
= get_frame_function (fi
);
1426 register struct block
*b
;
1428 register struct symbol
*sym
, *sym2
;
1429 register int values_printed
= 0;
1433 fprintf_filtered (stream
, "No symbol table info available.\n");
1437 b
= SYMBOL_BLOCK_VALUE (func
);
1438 ALL_BLOCK_SYMBOLS (b
, i
, sym
)
1440 switch (SYMBOL_CLASS (sym
))
1446 case LOC_REGPARM_ADDR
:
1447 case LOC_BASEREG_ARG
:
1449 fputs_filtered (SYMBOL_SOURCE_NAME (sym
), stream
);
1450 fputs_filtered (" = ", stream
);
1452 /* We have to look up the symbol because arguments can have
1453 two entries (one a parameter, one a local) and the one we
1454 want is the local, which lookup_symbol will find for us.
1455 This includes gcc1 (not gcc2) on the sparc when passing a
1456 small structure and gcc2 when the argument type is float
1457 and it is passed as a double and converted to float by
1458 the prologue (in the latter case the type of the LOC_ARG
1459 symbol is double and the type of the LOC_LOCAL symbol is
1460 float). There are also LOC_ARG/LOC_REGISTER pairs which
1461 are not combined in symbol-reading. */
1463 sym2
= lookup_symbol (SYMBOL_NAME (sym
),
1464 b
, VAR_NAMESPACE
, (int *) NULL
, (struct symtab
**) NULL
);
1465 print_variable_value (sym2
, fi
, stream
);
1466 fprintf_filtered (stream
, "\n");
1470 /* Don't worry about things which aren't arguments. */
1474 if (!values_printed
)
1476 fprintf_filtered (stream
, "No arguments.\n");
1481 args_info (char *ignore
, int from_tty
)
1483 if (!selected_frame
)
1484 error ("No frame selected.");
1485 print_frame_arg_vars (selected_frame
, gdb_stdout
);
1490 args_plus_locals_info (char *ignore
, int from_tty
)
1492 args_info (ignore
, from_tty
);
1493 locals_info (ignore
, from_tty
);
1497 /* Select frame FI, and note that its stack level is LEVEL.
1498 LEVEL may be -1 if an actual level number is not known. */
1501 select_frame (struct frame_info
*fi
, int level
)
1503 register struct symtab
*s
;
1505 selected_frame
= fi
;
1506 selected_frame_level
= level
;
1507 if (selected_frame_level_changed_hook
)
1508 selected_frame_level_changed_hook (level
);
1510 /* Ensure that symbols for this frame are read in. Also, determine the
1511 source language of this frame, and switch to it if desired. */
1514 s
= find_pc_symtab (fi
->pc
);
1516 && s
->language
!= current_language
->la_language
1517 && s
->language
!= language_unknown
1518 && language_mode
== language_mode_auto
)
1520 set_language (s
->language
);
1526 /* Select frame FI, noting that its stack level is LEVEL. Also print
1527 the stack frame and show the source if this is the tui version. */
1529 select_and_print_frame (struct frame_info
*fi
, int level
)
1531 select_frame (fi
, level
);
1534 print_stack_frame (fi
, level
, 1);
1539 /* Store the selected frame and its level into *FRAMEP and *LEVELP.
1540 If there is no selected frame, *FRAMEP is set to NULL. */
1543 record_selected_frame (CORE_ADDR
*frameaddrp
, int *levelp
)
1545 *frameaddrp
= selected_frame
? selected_frame
->frame
: 0;
1546 *levelp
= selected_frame_level
;
1549 /* Return the symbol-block in which the selected frame is executing.
1550 Can return zero under various legitimate circumstances. */
1553 get_selected_block (void)
1555 if (!target_has_stack
)
1558 if (!selected_frame
)
1559 return get_current_block ();
1560 return get_frame_block (selected_frame
);
1563 /* Find a frame a certain number of levels away from FRAME.
1564 LEVEL_OFFSET_PTR points to an int containing the number of levels.
1565 Positive means go to earlier frames (up); negative, the reverse.
1566 The int that contains the number of levels is counted toward
1567 zero as the frames for those levels are found.
1568 If the top or bottom frame is reached, that frame is returned,
1569 but the final value of *LEVEL_OFFSET_PTR is nonzero and indicates
1570 how much farther the original request asked to go. */
1573 find_relative_frame (register struct frame_info
*frame
,
1574 register int *level_offset_ptr
)
1576 register struct frame_info
*prev
;
1577 register struct frame_info
*frame1
;
1579 /* Going up is simple: just do get_prev_frame enough times
1580 or until initial frame is reached. */
1581 while (*level_offset_ptr
> 0)
1583 prev
= get_prev_frame (frame
);
1586 (*level_offset_ptr
)--;
1589 /* Going down is just as simple. */
1590 if (*level_offset_ptr
< 0)
1592 while (*level_offset_ptr
< 0)
1594 frame1
= get_next_frame (frame
);
1598 (*level_offset_ptr
)++;
1604 /* The "select_frame" command. With no arg, NOP.
1605 With arg LEVEL_EXP, select the frame at level LEVEL if it is a
1606 valid level. Otherwise, treat level_exp as an address expression
1607 and select it. See parse_frame_specification for more info on proper
1608 frame expressions. */
1613 select_frame_command_wrapper (char *level_exp
, int from_tty
)
1615 select_frame_command (level_exp
, from_tty
);
1619 select_frame_command (char *level_exp
, int from_tty
)
1621 register struct frame_info
*frame
, *frame1
;
1622 unsigned int level
= 0;
1624 if (!target_has_stack
)
1625 error ("No stack.");
1627 frame
= parse_frame_specification (level_exp
);
1629 /* Try to figure out what level this frame is. But if there is
1630 no current stack, don't error out -- let the user set one. */
1632 if (get_current_frame ())
1634 for (frame1
= get_prev_frame (0);
1635 frame1
&& frame1
!= frame
;
1636 frame1
= get_prev_frame (frame1
))
1643 select_frame (frame
, level
);
1646 /* The "frame" command. With no arg, print selected frame briefly.
1647 With arg, behaves like select_frame and then prints the selected
1651 frame_command (char *level_exp
, int from_tty
)
1653 select_frame_command (level_exp
, from_tty
);
1654 show_and_print_stack_frame (selected_frame
, selected_frame_level
, 1);
1657 /* The XDB Compatibility command to print the current frame. */
1660 current_frame_command (char *level_exp
, int from_tty
)
1662 if (target_has_stack
== 0 || selected_frame
== 0)
1663 error ("No stack.");
1664 print_only_stack_frame (selected_frame
, selected_frame_level
, 1);
1667 /* Select the frame up one or COUNT stack levels
1668 from the previously selected frame, and print it briefly. */
1672 up_silently_base (char *count_exp
)
1674 register struct frame_info
*fi
;
1675 int count
= 1, count1
;
1677 count
= parse_and_eval_long (count_exp
);
1680 if (target_has_stack
== 0 || selected_frame
== 0)
1681 error ("No stack.");
1683 fi
= find_relative_frame (selected_frame
, &count1
);
1684 if (count1
!= 0 && count_exp
== 0)
1685 error ("Initial frame selected; you cannot go up.");
1686 select_frame (fi
, selected_frame_level
+ count
- count1
);
1690 up_silently_command (char *count_exp
, int from_tty
)
1692 up_silently_base (count_exp
);
1696 up_command (char *count_exp
, int from_tty
)
1698 up_silently_base (count_exp
);
1699 show_and_print_stack_frame (selected_frame
, selected_frame_level
, 1);
1702 /* Select the frame down one or COUNT stack levels
1703 from the previously selected frame, and print it briefly. */
1707 down_silently_base (char *count_exp
)
1709 register struct frame_info
*frame
;
1710 int count
= -1, count1
;
1712 count
= -parse_and_eval_long (count_exp
);
1715 if (target_has_stack
== 0 || selected_frame
== 0)
1716 error ("No stack.");
1718 frame
= find_relative_frame (selected_frame
, &count1
);
1719 if (count1
!= 0 && count_exp
== 0)
1722 /* We only do this if count_exp is not specified. That way "down"
1723 means to really go down (and let me know if that is
1724 impossible), but "down 9999" can be used to mean go all the way
1725 down without getting an error. */
1727 error ("Bottom (i.e., innermost) frame selected; you cannot go down.");
1730 select_frame (frame
, selected_frame_level
+ count
- count1
);
1735 down_silently_command (char *count_exp
, int from_tty
)
1737 down_silently_base (count_exp
);
1741 down_command (char *count_exp
, int from_tty
)
1743 down_silently_base (count_exp
);
1744 show_and_print_stack_frame (selected_frame
, selected_frame_level
, 1);
1749 return_command_wrapper (char *retval_exp
, int from_tty
)
1751 return_command (retval_exp
, from_tty
);
1755 return_command (char *retval_exp
, int from_tty
)
1757 struct symbol
*thisfun
;
1758 CORE_ADDR selected_frame_addr
;
1759 CORE_ADDR selected_frame_pc
;
1760 struct frame_info
*frame
;
1761 value_ptr return_value
= NULL
;
1763 if (selected_frame
== NULL
)
1764 error ("No selected frame.");
1765 thisfun
= get_frame_function (selected_frame
);
1766 selected_frame_addr
= FRAME_FP (selected_frame
);
1767 selected_frame_pc
= selected_frame
->pc
;
1769 /* Compute the return value (if any -- possibly getting errors here). */
1773 struct type
*return_type
= NULL
;
1775 return_value
= parse_and_eval (retval_exp
);
1777 /* Cast return value to the return type of the function. */
1778 if (thisfun
!= NULL
)
1779 return_type
= TYPE_TARGET_TYPE (SYMBOL_TYPE (thisfun
));
1780 if (return_type
== NULL
)
1781 return_type
= builtin_type_int
;
1782 return_value
= value_cast (return_type
, return_value
);
1784 /* Make sure we have fully evaluated it, since
1785 it might live in the stack frame we're about to pop. */
1786 if (VALUE_LAZY (return_value
))
1787 value_fetch_lazy (return_value
);
1790 /* If interactive, require confirmation. */
1796 if (!query ("Make %s return now? ", SYMBOL_SOURCE_NAME (thisfun
)))
1798 error ("Not confirmed.");
1802 else if (!query ("Make selected stack frame return now? "))
1803 error ("Not confirmed.");
1806 /* Do the real work. Pop until the specified frame is current. We
1807 use this method because the selected_frame is not valid after
1808 a POP_FRAME. The pc comparison makes this work even if the
1809 selected frame shares its fp with another frame. */
1811 while (selected_frame_addr
!= (frame
= get_current_frame ())->frame
1812 || selected_frame_pc
!= frame
->pc
)
1815 /* Then pop that frame. */
1819 /* Compute the return value (if any) and store in the place
1820 for return values. */
1823 set_return_value (return_value
);
1825 /* If we are at the end of a call dummy now, pop the dummy frame too. */
1827 if (CALL_DUMMY_HAS_COMPLETED (read_pc(), read_sp (),
1828 FRAME_FP (get_current_frame ())))
1831 /* If interactive, print the frame that is now current. */
1834 frame_command ("0", 1);
1836 select_frame_command ("0", 0);
1839 /* Sets the scope to input function name, provided that the
1840 function is within the current stack frame */
1842 struct function_bounds
1844 CORE_ADDR low
, high
;
1847 static void func_command (char *arg
, int from_tty
);
1849 func_command (char *arg
, int from_tty
)
1851 struct frame_info
*fp
;
1853 struct symtabs_and_lines sals
;
1856 struct function_bounds
*func_bounds
= (struct function_bounds
*) NULL
;
1858 if (arg
!= (char *) NULL
)
1861 fp
= parse_frame_specification ("0");
1862 sals
= decode_line_spec (arg
, 1);
1863 func_bounds
= (struct function_bounds
*) xmalloc (
1864 sizeof (struct function_bounds
) * sals
.nelts
);
1865 for (i
= 0; (i
< sals
.nelts
&& !found
); i
++)
1867 if (sals
.sals
[i
].pc
== (CORE_ADDR
) 0 ||
1868 find_pc_partial_function (sals
.sals
[i
].pc
,
1870 &func_bounds
[i
].low
,
1871 &func_bounds
[i
].high
) == 0)
1873 func_bounds
[i
].low
=
1874 func_bounds
[i
].high
= (CORE_ADDR
) NULL
;
1880 for (i
= 0; (i
< sals
.nelts
&& !found
); i
++)
1881 found
= (fp
->pc
>= func_bounds
[i
].low
&&
1882 fp
->pc
< func_bounds
[i
].high
);
1886 fp
= find_relative_frame (fp
, &level
);
1889 while (!found
&& level
== 0);
1892 xfree (func_bounds
);
1895 printf_filtered ("'%s' not within current stack frame.\n", arg
);
1896 else if (fp
!= selected_frame
)
1897 select_and_print_frame (fp
, level
);
1900 /* Gets the language of the current frame. */
1903 get_frame_language (void)
1905 register struct symtab
*s
;
1906 enum language flang
; /* The language of the current frame */
1910 s
= find_pc_symtab (selected_frame
->pc
);
1912 flang
= s
->language
;
1914 flang
= language_unknown
;
1917 flang
= language_unknown
;
1923 _initialize_stack (void)
1926 backtrace_limit
= 30;
1929 add_com ("return", class_stack
, return_command
,
1930 "Make selected stack frame return to its caller.\n\
1931 Control remains in the debugger, but when you continue\n\
1932 execution will resume in the frame above the one now selected.\n\
1933 If an argument is given, it is an expression for the value to return.");
1935 add_com ("up", class_stack
, up_command
,
1936 "Select and print stack frame that called this one.\n\
1937 An argument says how many frames up to go.");
1938 add_com ("up-silently", class_support
, up_silently_command
,
1939 "Same as the `up' command, but does not print anything.\n\
1940 This is useful in command scripts.");
1942 add_com ("down", class_stack
, down_command
,
1943 "Select and print stack frame called by this one.\n\
1944 An argument says how many frames down to go.");
1945 add_com_alias ("do", "down", class_stack
, 1);
1946 add_com_alias ("dow", "down", class_stack
, 1);
1947 add_com ("down-silently", class_support
, down_silently_command
,
1948 "Same as the `down' command, but does not print anything.\n\
1949 This is useful in command scripts.");
1951 add_com ("frame", class_stack
, frame_command
,
1952 "Select and print a stack frame.\n\
1953 With no argument, print the selected stack frame. (See also \"info frame\").\n\
1954 An argument specifies the frame to select.\n\
1955 It can be a stack frame number or the address of the frame.\n\
1956 With argument, nothing is printed if input is coming from\n\
1957 a command file or a user-defined command.");
1959 add_com_alias ("f", "frame", class_stack
, 1);
1963 add_com ("L", class_stack
, current_frame_command
,
1964 "Print the current stack frame.\n");
1965 add_com_alias ("V", "frame", class_stack
, 1);
1967 add_com ("select-frame", class_stack
, select_frame_command
,
1968 "Select a stack frame without printing anything.\n\
1969 An argument specifies the frame to select.\n\
1970 It can be a stack frame number or the address of the frame.\n");
1972 add_com ("backtrace", class_stack
, backtrace_command
,
1973 "Print backtrace of all stack frames, or innermost COUNT frames.\n\
1974 With a negative argument, print outermost -COUNT frames.\n\
1975 Use of the 'full' qualifier also prints the values of the local variables.\n");
1976 add_com_alias ("bt", "backtrace", class_stack
, 0);
1979 add_com_alias ("t", "backtrace", class_stack
, 0);
1980 add_com ("T", class_stack
, backtrace_full_command
,
1981 "Print backtrace of all stack frames, or innermost COUNT frames \n\
1982 and the values of the local variables.\n\
1983 With a negative argument, print outermost -COUNT frames.\n\
1984 Usage: T <count>\n");
1987 add_com_alias ("where", "backtrace", class_alias
, 0);
1988 add_info ("stack", backtrace_command
,
1989 "Backtrace of the stack, or innermost COUNT frames.");
1990 add_info_alias ("s", "stack", 1);
1991 add_info ("frame", frame_info
,
1992 "All about selected stack frame, or frame at ADDR.");
1993 add_info_alias ("f", "frame", 1);
1994 add_info ("locals", locals_info
,
1995 "Local variables of current stack frame.");
1996 add_info ("args", args_info
,
1997 "Argument variables of current stack frame.");
1999 add_com ("l", class_info
, args_plus_locals_info
,
2000 "Argument and local variables of current stack frame.");
2003 add_com ("func", class_stack
, func_command
,
2004 "Select the stack frame that contains <func>.\nUsage: func <name>\n");
2006 add_info ("catch", catch_info
,
2007 "Exceptions that can be caught in the current stack frame.");
2010 add_cmd ("backtrace-limit", class_stack
, set_backtrace_limit_command
,
2011 "Specify maximum number of frames for \"backtrace\" to print by default.",
2013 add_info ("backtrace-limit", backtrace_limit_info
,
2014 "The maximum number of frames for \"backtrace\" to print by default.");