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 lines_to_list
; /* # of lines "list" command shows by default */
113 /* The "selected" stack frame is used by default for local and arg access.
114 May be zero, for no selected frame. */
116 struct frame_info
*selected_frame
;
118 /* Level of the selected frame:
119 0 for innermost, 1 for its caller, ...
120 or -1 for frame specified by address with no defined level. */
122 int selected_frame_level
;
124 /* Zero means do things normally; we are interacting directly with the
125 user. One means print the full filename and linenumber when a
126 frame is printed, and do so in a format emacs18/emacs19.22 can
127 parse. Two means print similar annotations, but in many more
128 cases and in a slightly different syntax. */
130 int annotation_level
= 0;
133 struct print_stack_frame_args
135 struct frame_info
*fi
;
141 static int print_stack_frame_base_stub (char *);
143 /* Show and print the frame arguments.
144 Pass the args the way catch_errors wants them. */
145 static int show_and_print_stack_frame_stub (void *args
);
147 show_and_print_stack_frame_stub (void *args
)
149 struct print_stack_frame_args
*p
= (struct print_stack_frame_args
*) args
;
151 print_frame_info (p
->fi
, p
->level
, p
->source
, p
->args
);
156 /* Show or print the frame arguments.
157 Pass the args the way catch_errors wants them. */
158 static int print_stack_frame_stub (void *args
);
160 print_stack_frame_stub (void *args
)
162 struct print_stack_frame_args
*p
= (struct print_stack_frame_args
*) args
;
164 print_frame_info_base (p
->fi
, p
->level
, p
->source
, p
->args
);
168 /* Print a stack frame briefly. FRAME_INFI should be the frame info
169 and LEVEL should be its level in the stack (or -1 for level not
172 /* Pass the args the way catch_errors wants them. */
174 print_stack_frame_base_stub (char *args
)
176 struct print_stack_frame_args
*p
= (struct print_stack_frame_args
*) args
;
178 print_frame_info_base (p
->fi
, p
->level
, p
->source
, p
->args
);
182 /* print the frame arguments to the terminal.
183 Pass the args the way catch_errors wants them. */
184 static int print_only_stack_frame_stub (void *);
186 print_only_stack_frame_stub (void *args
)
188 struct print_stack_frame_args
*p
= (struct print_stack_frame_args
*) args
;
190 print_frame_info_base (p
->fi
, p
->level
, p
->source
, p
->args
);
194 /* Print a stack frame briefly. FRAME_INFI should be the frame info
195 and LEVEL should be its level in the stack (or -1 for level not defined).
196 This prints the level, the function executing, the arguments,
197 and the file name and line number.
198 If the pc is not at the beginning of the source line,
199 the actual pc is printed at the beginning.
201 If SOURCE is 1, print the source line as well.
202 If SOURCE is -1, print ONLY the source line. */
205 print_stack_frame_base (struct frame_info
*fi
, int level
, int source
)
207 struct print_stack_frame_args args
;
211 args
.source
= source
;
214 catch_errors (print_stack_frame_stub
, &args
, "", RETURN_MASK_ALL
);
217 /* Show and print a stack frame briefly. FRAME_INFI should be the frame info
218 and LEVEL should be its level in the stack (or -1 for level not defined).
219 This prints the level, the function executing, the arguments,
220 and the file name and line number.
221 If the pc is not at the beginning of the source line,
222 the actual pc is printed at the beginning.
224 If SOURCE is 1, print the source line as well.
225 If SOURCE is -1, print ONLY the source line. */
228 show_and_print_stack_frame (struct frame_info
*fi
, int level
, int source
)
230 struct print_stack_frame_args args
;
234 args
.source
= source
;
237 catch_errors (show_and_print_stack_frame_stub
, &args
, "", RETURN_MASK_ALL
);
241 /* Show or print a stack frame briefly. FRAME_INFI should be the frame info
242 and LEVEL should be its level in the stack (or -1 for level not defined).
243 This prints the level, the function executing, the arguments,
244 and the file name and line number.
245 If the pc is not at the beginning of the source line,
246 the actual pc is printed at the beginning.
248 If SOURCE is 1, print the source line as well.
249 If SOURCE is -1, print ONLY the source line. */
252 print_stack_frame (struct frame_info
*fi
, int level
, int source
)
254 struct print_stack_frame_args args
;
258 args
.source
= source
;
261 catch_errors (print_stack_frame_stub
, (char *) &args
, "", RETURN_MASK_ALL
);
264 /* Print a stack frame briefly. FRAME_INFI should be the frame info
265 and LEVEL should be its level in the stack (or -1 for level not defined).
266 This prints the level, the function executing, the arguments,
267 and the file name and line number.
268 If the pc is not at the beginning of the source line,
269 the actual pc is printed at the beginning.
271 If SOURCE is 1, print the source line as well.
272 If SOURCE is -1, print ONLY the source line. */
275 print_only_stack_frame (struct frame_info
*fi
, int level
, int source
)
277 struct print_stack_frame_args args
;
281 args
.source
= source
;
284 catch_errors (print_only_stack_frame_stub
, &args
, "", RETURN_MASK_ALL
);
287 struct print_args_args
290 struct frame_info
*fi
;
291 struct ui_file
*stream
;
294 static int print_args_stub (PTR
);
296 /* Pass the args the way catch_errors wants them. */
299 print_args_stub (PTR args
)
302 struct print_args_args
*p
= (struct print_args_args
*) args
;
304 numargs
= FRAME_NUM_ARGS (p
->fi
);
305 print_frame_args (p
->func
, p
->fi
, numargs
, p
->stream
);
309 /* Print information about a frame for frame "fi" at level "level".
310 Used in "where" output, also used to emit breakpoint or step
312 LEVEL is the level of the frame, or -1 if it is the
313 innermost frame but we don't want to print the level.
314 The meaning of the SOURCE argument is:
315 SRC_LINE: Print only source line
316 LOCATION: Print only location
317 LOC_AND_SRC: Print location and source line. */
320 print_frame_info_base (struct frame_info
*fi
, int level
, int source
, int args
)
322 struct symtab_and_line sal
;
327 char buf
[MAX_REGISTER_RAW_SIZE
];
330 /* On the 68k, this spends too much time in m68k_find_saved_regs. */
332 /* Get the value of SP_REGNUM relative to the frame. */
333 get_saved_register (buf
, (int *) NULL
, (CORE_ADDR
*) NULL
,
334 FRAME_INFO_ID (fi
), SP_REGNUM
, (enum lval_type
*) NULL
);
335 sp
= extract_address (buf
, REGISTER_RAW_SIZE (SP_REGNUM
));
337 /* This is not a perfect test, because if a function alloca's some
338 memory, puts some code there, and then jumps into it, then the test
339 will succeed even though there is no call dummy. Probably best is
340 to check for a bp_call_dummy breakpoint. */
341 if (PC_IN_CALL_DUMMY (fi
->pc
, sp
, fi
->frame
))
343 if (frame_in_dummy (fi
))
346 annotate_frame_begin (level
== -1 ? 0 : level
, fi
->pc
);
348 /* Do this regardless of SOURCE because we don't have any source
349 to list for this frame. */
351 printf_filtered ("#%-2d ", level
);
352 annotate_function_call ();
353 printf_filtered ("<function called from gdb>\n");
354 annotate_frame_end ();
357 if (fi
->signal_handler_caller
)
359 annotate_frame_begin (level
== -1 ? 0 : level
, fi
->pc
);
361 /* Do this regardless of SOURCE because we don't have any source
362 to list for this frame. */
364 printf_filtered ("#%-2d ", level
);
365 annotate_signal_handler_caller ();
366 printf_filtered ("<signal handler called>\n");
367 annotate_frame_end ();
371 /* If fi is not the innermost frame, that normally means that fi->pc
372 points to *after* the call instruction, and we want to get the line
373 containing the call, never the next line. But if the next frame is
374 a signal_handler_caller or a dummy frame, then the next frame was
375 not entered as the result of a call, and we want to get the line
376 containing fi->pc. */
378 find_pc_line (fi
->pc
,
380 && !fi
->next
->signal_handler_caller
381 && !frame_in_dummy (fi
->next
));
383 location_print
= (source
== LOCATION
384 || source
== LOC_AND_ADDRESS
385 || source
== SRC_AND_LOC
);
387 if (location_print
|| !sal
.symtab
)
388 print_frame (fi
, level
, source
, args
, sal
);
390 source_print
= (source
== SRC_LINE
|| source
== SRC_AND_LOC
);
392 if (source_print
&& sal
.symtab
)
395 int mid_statement
= (source
== SRC_LINE
) && (fi
->pc
!= sal
.pc
);
397 if (annotation_level
)
398 done
= identify_source_line (sal
.symtab
, sal
.line
, mid_statement
,
402 if (addressprint
&& mid_statement
)
405 ui_out_field_core_addr (uiout
, "addr", fi
->pc
);
406 ui_out_text (uiout
, "\t");
408 print_address_numeric (fi
->pc
, 1, gdb_stdout
);
409 printf_filtered ("\t");
412 if (print_frame_info_listing_hook
)
413 print_frame_info_listing_hook (sal
.symtab
, sal
.line
, sal
.line
+ 1, 0);
415 print_source_lines (sal
.symtab
, sal
.line
, sal
.line
+ 1, 0);
417 current_source_line
= max (sal
.line
- lines_to_list
/ 2, 1);
421 set_default_breakpoint (1, fi
->pc
, sal
.symtab
, sal
.line
);
423 annotate_frame_end ();
425 gdb_flush (gdb_stdout
);
429 print_frame (struct frame_info
*fi
,
433 struct symtab_and_line sal
)
436 register char *funname
= 0;
437 enum language funlang
= language_unknown
;
439 struct ui_stream
*stb
;
440 struct cleanup
*old_chain
;
441 struct cleanup
*list_chain
;
443 stb
= ui_out_stream_new (uiout
);
444 old_chain
= make_cleanup_ui_out_stream_delete (stb
);
447 func
= find_pc_function (fi
->pc
);
450 /* In certain pathological cases, the symtabs give the wrong
451 function (when we are in the first function in a file which
452 is compiled without debugging symbols, the previous function
453 is compiled with debugging symbols, and the "foo.o" symbol
454 that is supposed to tell us where the file with debugging symbols
455 ends has been truncated by ar because it is longer than 15
456 characters). This also occurs if the user uses asm() to create
457 a function but not stabs for it (in a file compiled -g).
459 So look in the minimal symbol tables as well, and if it comes
460 up with a larger address for the function use that instead.
461 I don't think this can ever cause any problems; there shouldn't
462 be any minimal symbols in the middle of a function; if this is
463 ever changed many parts of GDB will need to be changed (and we'll
464 create a find_pc_minimal_function or some such). */
466 struct minimal_symbol
*msymbol
= lookup_minimal_symbol_by_pc (fi
->pc
);
468 && (SYMBOL_VALUE_ADDRESS (msymbol
)
469 > BLOCK_START (SYMBOL_BLOCK_VALUE (func
))))
472 /* There is no particular reason to think the line number
473 information is wrong. Someone might have just put in
474 a label with asm() but left the line numbers alone. */
475 /* In this case we have no way of knowing the source file
476 and line number, so don't print them. */
479 /* We also don't know anything about the function besides
480 its address and name. */
482 funname
= SYMBOL_NAME (msymbol
);
483 funlang
= SYMBOL_LANGUAGE (msymbol
);
487 /* I'd like to use SYMBOL_SOURCE_NAME() here, to display the
488 demangled name that we already have stored in the symbol
489 table, but we stored a version with DMGL_PARAMS turned
490 on, and here we don't want to display parameters. So call
491 the demangler again, with DMGL_ANSI only. (Yes, I know
492 that printf_symbol_filtered() will again try to demangle
493 the name on the fly, but the issue is that if
494 cplus_demangle() fails here, it'll fail there too. So we
495 want to catch the failure ("demangled==NULL" case below)
496 here, while we still have our hands on the function
499 funname
= SYMBOL_NAME (func
);
500 funlang
= SYMBOL_LANGUAGE (func
);
501 if (funlang
== language_cplus
)
503 demangled
= cplus_demangle (funname
, DMGL_ANSI
);
504 if (demangled
== NULL
)
505 /* If the demangler fails, try the demangled name from
506 the symbol table. This'll have parameters, but
507 that's preferable to diplaying a mangled name. */
508 funname
= SYMBOL_SOURCE_NAME (func
);
514 struct minimal_symbol
*msymbol
= lookup_minimal_symbol_by_pc (fi
->pc
);
517 funname
= SYMBOL_NAME (msymbol
);
518 funlang
= SYMBOL_LANGUAGE (msymbol
);
522 annotate_frame_begin (level
== -1 ? 0 : level
, fi
->pc
);
525 list_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "frame");
531 ui_out_text (uiout
, "#");
532 ui_out_field_fmt (uiout
, "level", "%-2d", level
);
533 ui_out_spaces (uiout
, 1);
535 printf_filtered ("#%-2d ", level
);
539 if (fi
->pc
!= sal
.pc
|| !sal
.symtab
|| source
== LOC_AND_ADDRESS
)
541 annotate_frame_address ();
543 ui_out_field_core_addr (uiout
, "addr", fi
->pc
);
544 annotate_frame_address_end ();
545 ui_out_text (uiout
, " in ");
547 print_address_numeric (fi
->pc
, 1, gdb_stdout
);
548 annotate_frame_address_end ();
549 printf_filtered (" in ");
552 annotate_frame_function_name ();
554 fprintf_symbol_filtered (stb
->stream
, funname
? funname
: "??", funlang
,
556 ui_out_field_stream (uiout
, "func", stb
);
557 ui_out_wrap_hint (uiout
, " ");
559 fprintf_symbol_filtered (gdb_stdout
, funname
? funname
: "??", funlang
,
563 annotate_frame_args ();
566 ui_out_text (uiout
, " (");
568 fputs_filtered (" (", gdb_stdout
);
572 struct print_args_args args
;
574 struct cleanup
*args_list_chain
;
578 args
.stream
= gdb_stdout
;
580 args_list_chain
= make_cleanup_ui_out_list_begin_end (uiout
, "args");
581 catch_errors (print_args_stub
, &args
, "", RETURN_MASK_ALL
);
582 /* FIXME: args must be a list. If one argument is a string it will
583 have " that will not be properly escaped. */
584 /* Invoke ui_out_tuple_end. */
585 do_cleanups (args_list_chain
);
587 catch_errors (print_args_stub
, &args
, "", RETURN_MASK_ALL
);
592 ui_out_text (uiout
, ")");
594 printf_filtered (")");
596 if (sal
.symtab
&& sal
.symtab
->filename
)
598 annotate_frame_source_begin ();
600 ui_out_wrap_hint (uiout
, " ");
601 ui_out_text (uiout
, " at ");
602 annotate_frame_source_file ();
603 ui_out_field_string (uiout
, "file", sal
.symtab
->filename
);
604 annotate_frame_source_file_end ();
605 ui_out_text (uiout
, ":");
606 annotate_frame_source_line ();
607 ui_out_field_int (uiout
, "line", sal
.line
);
610 printf_filtered (" at ");
611 annotate_frame_source_file ();
612 printf_filtered ("%s", sal
.symtab
->filename
);
613 annotate_frame_source_file_end ();
614 printf_filtered (":");
615 annotate_frame_source_line ();
616 printf_filtered ("%d", sal
.line
);
618 annotate_frame_source_end ();
622 if (!funname
|| (!sal
.symtab
|| !sal
.symtab
->filename
))
624 char *lib
= PC_SOLIB (fi
->pc
);
627 annotate_frame_where ();
629 ui_out_wrap_hint (uiout
, " ");
630 ui_out_text (uiout
, " from ");
631 ui_out_field_string (uiout
, "from", lib
);
634 printf_filtered (" from %s", lib
);
638 #endif /* PC_SOLIB */
641 /* do_cleanups will call ui_out_tuple_end() for us. */
642 do_cleanups (list_chain
);
643 ui_out_text (uiout
, "\n");
644 do_cleanups (old_chain
);
646 printf_filtered ("\n");
651 /* Show or print the frame info. If this is the tui, it will be shown in
652 the source display */
654 print_frame_info (struct frame_info
*fi
, register int level
, int source
,
657 print_frame_info_base (fi
, level
, source
, args
);
660 /* Show the frame info. If this is the tui, it will be shown in
661 the source display otherwise, nothing is done */
663 show_stack_frame (struct frame_info
*fi
)
668 /* Read a frame specification in whatever the appropriate format is.
669 Call error() if the specification is in any way invalid (i.e.
670 this function never returns NULL). */
673 parse_frame_specification (char *frame_exp
)
677 CORE_ADDR args
[MAXARGS
];
682 char *addr_string
, *p
;
683 struct cleanup
*tmp_cleanup
;
685 while (*frame_exp
== ' ')
690 if (numargs
> MAXARGS
)
691 error ("Too many args in frame specification");
692 /* Parse an argument. */
693 for (p
= frame_exp
; *p
&& *p
!= ' '; p
++)
695 addr_string
= savestring (frame_exp
, p
- frame_exp
);
700 tmp_cleanup
= make_cleanup (xfree
, addr_string
);
702 /* NOTE: we call parse_and_eval and then both
703 value_as_long and value_as_address rather than calling
704 parse_and_eval_long and parse_and_eval_address because
705 of the issue of potential side effects from evaluating
707 vp
= parse_and_eval (addr_string
);
709 level
= value_as_long (vp
);
711 args
[numargs
++] = value_as_address (vp
);
712 do_cleanups (tmp_cleanup
);
715 /* Skip spaces, move to possible next arg. */
725 if (selected_frame
== NULL
)
726 error ("No selected frame.");
727 return selected_frame
;
731 struct frame_info
*fid
=
732 find_relative_frame (get_current_frame (), &level
);
733 struct frame_info
*tfid
;
736 /* find_relative_frame was successful */
739 /* If SETUP_ARBITRARY_FRAME is defined, then frame specifications
740 take at least 2 addresses. It is important to detect this case
741 here so that "frame 100" does not give a confusing error message
742 like "frame specification requires two addresses". This of course
743 does not solve the "frame 100" problem for machines on which
744 a frame specification can be made with one address. To solve
745 that, we need a new syntax for a specifying a frame by address.
746 I think the cleanest syntax is $frame(0x45) ($frame(0x23,0x45) for
747 two args, etc.), but people might think that is too much typing,
748 so I guess *0x23,0x45 would be a possible alternative (commas
749 really should be used instead of spaces to delimit; using spaces
750 normally works in an expression). */
751 #ifdef SETUP_ARBITRARY_FRAME
752 error ("No frame %d", args
[0]);
755 /* If (s)he specifies the frame with an address, he deserves what
756 (s)he gets. Still, give the highest one that matches. */
758 for (fid
= get_current_frame ();
759 fid
&& fid
->frame
!= args
[0];
760 fid
= get_prev_frame (fid
))
764 while ((tfid
= get_prev_frame (fid
)) &&
765 (tfid
->frame
== args
[0]))
768 /* We couldn't identify the frame as an existing frame, but
769 perhaps we can create one with a single argument. */
773 #ifdef SETUP_ARBITRARY_FRAME
774 return SETUP_ARBITRARY_FRAME (numargs
, args
);
776 /* Usual case. Do it here rather than have everyone supply
777 a SETUP_ARBITRARY_FRAME that does this. */
779 return create_new_frame (args
[0], 0);
780 error ("Too many args in frame specification");
787 /* FRAME_ARGS_ADDRESS_CORRECT is just like FRAME_ARGS_ADDRESS except
788 that if it is unsure about the answer, it returns 0
789 instead of guessing (this happens on the VAX and i960, for example).
791 On most machines, we never have to guess about the args address,
792 so FRAME_ARGS_ADDRESS{,_CORRECT} are the same. */
793 #if !defined (FRAME_ARGS_ADDRESS_CORRECT)
794 #define FRAME_ARGS_ADDRESS_CORRECT FRAME_ARGS_ADDRESS
797 /* Print verbosely the selected frame or the frame at address ADDR.
798 This means absolutely all information in the frame is printed. */
801 frame_info (char *addr_exp
, int from_tty
)
803 struct frame_info
*fi
;
804 struct symtab_and_line sal
;
807 struct frame_info
*calling_frame_info
;
808 int i
, count
, numregs
;
810 enum language funlang
= language_unknown
;
812 if (!target_has_stack
)
815 fi
= parse_frame_specification (addr_exp
);
817 error ("Invalid frame specified.");
819 sal
= find_pc_line (fi
->pc
,
821 && !fi
->next
->signal_handler_caller
822 && !frame_in_dummy (fi
->next
));
823 func
= get_frame_function (fi
);
824 s
= find_pc_symtab (fi
->pc
);
827 /* I'd like to use SYMBOL_SOURCE_NAME() here, to display
828 * the demangled name that we already have stored in
829 * the symbol table, but we stored a version with
830 * DMGL_PARAMS turned on, and here we don't want
831 * to display parameters. So call the demangler again,
832 * with DMGL_ANSI only. RT
833 * (Yes, I know that printf_symbol_filtered() will
834 * again try to demangle the name on the fly, but
835 * the issue is that if cplus_demangle() fails here,
836 * it'll fail there too. So we want to catch the failure
837 * ("demangled==NULL" case below) here, while we still
838 * have our hands on the function symbol.)
841 funname
= SYMBOL_NAME (func
);
842 funlang
= SYMBOL_LANGUAGE (func
);
843 if (funlang
== language_cplus
)
845 demangled
= cplus_demangle (funname
, DMGL_ANSI
);
846 /* If the demangler fails, try the demangled name
847 * from the symbol table. This'll have parameters,
848 * but that's preferable to diplaying a mangled name.
850 if (demangled
== NULL
)
851 funname
= SYMBOL_SOURCE_NAME (func
);
856 register struct minimal_symbol
*msymbol
= lookup_minimal_symbol_by_pc (fi
->pc
);
859 funname
= SYMBOL_NAME (msymbol
);
860 funlang
= SYMBOL_LANGUAGE (msymbol
);
863 calling_frame_info
= get_prev_frame (fi
);
865 if (!addr_exp
&& selected_frame_level
>= 0)
867 printf_filtered ("Stack level %d, frame at ", selected_frame_level
);
868 print_address_numeric (fi
->frame
, 1, gdb_stdout
);
869 printf_filtered (":\n");
873 printf_filtered ("Stack frame at ");
874 print_address_numeric (fi
->frame
, 1, gdb_stdout
);
875 printf_filtered (":\n");
877 printf_filtered (" %s = ", REGISTER_NAME (PC_REGNUM
));
878 print_address_numeric (fi
->pc
, 1, gdb_stdout
);
883 printf_filtered (" in ");
884 fprintf_symbol_filtered (gdb_stdout
, funname
, funlang
,
885 DMGL_ANSI
| DMGL_PARAMS
);
889 printf_filtered (" (%s:%d)", sal
.symtab
->filename
, sal
.line
);
890 puts_filtered ("; ");
892 printf_filtered ("saved %s ", REGISTER_NAME (PC_REGNUM
));
893 print_address_numeric (FRAME_SAVED_PC (fi
), 1, gdb_stdout
);
894 printf_filtered ("\n");
898 frameless
= FRAMELESS_FUNCTION_INVOCATION (fi
);
900 printf_filtered (" (FRAMELESS),");
903 if (calling_frame_info
)
905 printf_filtered (" called by frame at ");
906 print_address_numeric (calling_frame_info
->frame
, 1, gdb_stdout
);
908 if (fi
->next
&& calling_frame_info
)
913 printf_filtered (" caller of frame at ");
914 print_address_numeric (fi
->next
->frame
, 1, gdb_stdout
);
916 if (fi
->next
|| calling_frame_info
)
917 puts_filtered ("\n");
919 printf_filtered (" source language %s.\n", language_str (s
->language
));
921 #ifdef PRINT_EXTRA_FRAME_INFO
922 PRINT_EXTRA_FRAME_INFO (fi
);
926 /* Address of the argument list for this frame, or 0. */
927 CORE_ADDR arg_list
= FRAME_ARGS_ADDRESS_CORRECT (fi
);
928 /* Number of args for this frame, or -1 if unknown. */
932 printf_filtered (" Arglist at unknown address.\n");
935 printf_filtered (" Arglist at ");
936 print_address_numeric (arg_list
, 1, gdb_stdout
);
937 printf_filtered (",");
939 numargs
= FRAME_NUM_ARGS (fi
);
941 puts_filtered (" args: ");
942 else if (numargs
== 0)
943 puts_filtered (" no args.");
944 else if (numargs
== 1)
945 puts_filtered (" 1 arg: ");
947 printf_filtered (" %d args: ", numargs
);
948 print_frame_args (func
, fi
, numargs
, gdb_stdout
);
949 puts_filtered ("\n");
953 /* Address of the local variables for this frame, or 0. */
954 CORE_ADDR arg_list
= FRAME_LOCALS_ADDRESS (fi
);
957 printf_filtered (" Locals at unknown address,");
960 printf_filtered (" Locals at ");
961 print_address_numeric (arg_list
, 1, gdb_stdout
);
962 printf_filtered (",");
966 FRAME_INIT_SAVED_REGS (fi
);
967 if (fi
->saved_regs
!= NULL
)
969 /* The sp is special; what's returned isn't the save address, but
970 actually the value of the previous frame's sp. */
971 printf_filtered (" Previous frame's sp is ");
972 print_address_numeric (fi
->saved_regs
[SP_REGNUM
], 1, gdb_stdout
);
973 printf_filtered ("\n");
975 numregs
= NUM_REGS
+ NUM_PSEUDO_REGS
;
976 for (i
= 0; i
< numregs
; i
++)
977 if (fi
->saved_regs
[i
] && i
!= SP_REGNUM
)
980 puts_filtered (" Saved registers:\n ");
984 printf_filtered (" %s at ", REGISTER_NAME (i
));
985 print_address_numeric (fi
->saved_regs
[i
], 1, gdb_stdout
);
989 puts_filtered ("\n");
993 /* We could get some information about saved registers by
994 calling get_saved_register on each register. Which info goes
995 with which frame is necessarily lost, however, and I suspect
996 that the users don't care whether they get the info. */
997 puts_filtered ("\n");
1002 /* Set a limit on the number of frames printed by default in a
1005 static int backtrace_limit
;
1008 set_backtrace_limit_command (char *count_exp
, int from_tty
)
1010 int count
= parse_and_eval_long (count_exp
);
1013 error ("Negative argument not meaningful as backtrace limit.");
1015 backtrace_limit
= count
;
1019 backtrace_limit_info (char *arg
, int from_tty
)
1022 error ("\"Info backtrace-limit\" takes no arguments.");
1024 printf_unfiltered ("Backtrace limit: %d.\n", backtrace_limit
);
1028 /* Print briefly all stack frames or just the innermost COUNT frames. */
1030 static void backtrace_command_1 (char *count_exp
, int show_locals
,
1033 backtrace_command_1 (char *count_exp
, int show_locals
, int from_tty
)
1035 struct frame_info
*fi
;
1038 register struct frame_info
*trailing
;
1039 register int trailing_level
;
1041 if (!target_has_stack
)
1042 error ("No stack.");
1044 /* The following code must do two things. First, it must
1045 set the variable TRAILING to the frame from which we should start
1046 printing. Second, it must set the variable count to the number
1047 of frames which we should print, or -1 if all of them. */
1048 trailing
= get_current_frame ();
1050 /* The target can be in a state where there is no valid frames
1051 (e.g., just connected). */
1052 if (trailing
== NULL
)
1053 error ("No stack.");
1058 count
= parse_and_eval_long (count_exp
);
1061 struct frame_info
*current
;
1066 while (current
&& count
--)
1069 current
= get_prev_frame (current
);
1072 /* Will stop when CURRENT reaches the top of the stack. TRAILING
1073 will be COUNT below it. */
1077 trailing
= get_prev_frame (trailing
);
1078 current
= get_prev_frame (current
);
1090 struct partial_symtab
*ps
;
1092 /* Read in symbols for all of the frames. Need to do this in
1093 a separate pass so that "Reading in symbols for xxx" messages
1094 don't screw up the appearance of the backtrace. Also
1095 if people have strong opinions against reading symbols for
1096 backtrace this may have to be an option. */
1100 fi
= get_prev_frame (fi
))
1103 ps
= find_pc_psymtab (fi
->pc
);
1105 PSYMTAB_TO_SYMTAB (ps
); /* Force syms to come in */
1109 for (i
= 0, fi
= trailing
;
1111 i
++, fi
= get_prev_frame (fi
))
1115 /* Don't use print_stack_frame; if an error() occurs it probably
1116 means further attempts to backtrace would fail (on the other
1117 hand, perhaps the code does or could be fixed to make sure
1118 the frame->prev field gets set to NULL in that case). */
1119 print_frame_info_base (fi
, trailing_level
+ i
, 0, 1);
1121 print_frame_local_vars (fi
, 1, gdb_stdout
);
1124 /* If we've stopped before the end, mention that. */
1126 printf_filtered ("(More stack frames follow...)\n");
1130 backtrace_command (char *arg
, int from_tty
)
1132 struct cleanup
*old_chain
= (struct cleanup
*) NULL
;
1133 char **argv
= (char **) NULL
;
1134 int argIndicatingFullTrace
= (-1), totArgLen
= 0, argc
= 0;
1137 if (arg
!= (char *) NULL
)
1141 argv
= buildargv (arg
);
1142 old_chain
= make_cleanup_freeargv (argv
);
1144 for (i
= 0; (argv
[i
] != (char *) NULL
); i
++)
1148 for (j
= 0; (j
< strlen (argv
[i
])); j
++)
1149 argv
[i
][j
] = tolower (argv
[i
][j
]);
1151 if (argIndicatingFullTrace
< 0 && subset_compare (argv
[i
], "full"))
1152 argIndicatingFullTrace
= argc
;
1156 totArgLen
+= strlen (argv
[i
]);
1160 if (argIndicatingFullTrace
>= 0)
1164 argPtr
= (char *) xmalloc (totArgLen
+ 1);
1169 memset (argPtr
, 0, totArgLen
+ 1);
1170 for (i
= 0; (i
< (argc
+ 1)); i
++)
1172 if (i
!= argIndicatingFullTrace
)
1174 strcat (argPtr
, argv
[i
]);
1175 strcat (argPtr
, " ");
1181 argPtr
= (char *) NULL
;
1185 backtrace_command_1 (argPtr
, (argIndicatingFullTrace
>= 0), from_tty
);
1187 if (argIndicatingFullTrace
>= 0 && totArgLen
> 0)
1191 do_cleanups (old_chain
);
1194 static void backtrace_full_command (char *arg
, int from_tty
);
1196 backtrace_full_command (char *arg
, int from_tty
)
1198 backtrace_command_1 (arg
, 1, from_tty
);
1202 /* Print the local variables of a block B active in FRAME.
1203 Return 1 if any variables were printed; 0 otherwise. */
1206 print_block_frame_locals (struct block
*b
, register struct frame_info
*fi
,
1207 int num_tabs
, register struct ui_file
*stream
)
1210 register struct symbol
*sym
;
1211 register int values_printed
= 0;
1213 ALL_BLOCK_SYMBOLS (b
, i
, sym
)
1215 switch (SYMBOL_CLASS (sym
))
1222 for (j
= 0; j
< num_tabs
; j
++)
1223 fputs_filtered ("\t", stream
);
1224 fputs_filtered (SYMBOL_SOURCE_NAME (sym
), stream
);
1225 fputs_filtered (" = ", stream
);
1226 print_variable_value (sym
, fi
, stream
);
1227 fprintf_filtered (stream
, "\n");
1231 /* Ignore symbols which are not locals. */
1235 return values_printed
;
1238 /* Same, but print labels. */
1241 print_block_frame_labels (struct block
*b
, int *have_default
,
1242 register struct ui_file
*stream
)
1245 register struct symbol
*sym
;
1246 register int values_printed
= 0;
1248 ALL_BLOCK_SYMBOLS (b
, i
, sym
)
1250 if (STREQ (SYMBOL_NAME (sym
), "default"))
1256 if (SYMBOL_CLASS (sym
) == LOC_LABEL
)
1258 struct symtab_and_line sal
;
1259 sal
= find_pc_line (SYMBOL_VALUE_ADDRESS (sym
), 0);
1261 fputs_filtered (SYMBOL_SOURCE_NAME (sym
), stream
);
1264 fprintf_filtered (stream
, " ");
1265 print_address_numeric (SYMBOL_VALUE_ADDRESS (sym
), 1, stream
);
1267 fprintf_filtered (stream
, " in file %s, line %d\n",
1268 sal
.symtab
->filename
, sal
.line
);
1271 return values_printed
;
1274 /* Print on STREAM all the local variables in frame FRAME,
1275 including all the blocks active in that frame
1278 Returns 1 if the job was done,
1279 or 0 if nothing was printed because we have no info
1280 on the function running in FRAME. */
1283 print_frame_local_vars (register struct frame_info
*fi
, register int num_tabs
,
1284 register struct ui_file
*stream
)
1286 register struct block
*block
= get_frame_block (fi
);
1287 register int values_printed
= 0;
1291 fprintf_filtered (stream
, "No symbol table info available.\n");
1297 if (print_block_frame_locals (block
, fi
, num_tabs
, stream
))
1299 /* After handling the function's top-level block, stop.
1300 Don't continue to its superblock, the block of
1301 per-file symbols. */
1302 if (BLOCK_FUNCTION (block
))
1304 block
= BLOCK_SUPERBLOCK (block
);
1307 if (!values_printed
)
1309 fprintf_filtered (stream
, "No locals.\n");
1313 /* Same, but print labels. */
1316 print_frame_label_vars (register struct frame_info
*fi
, int this_level_only
,
1317 register struct ui_file
*stream
)
1319 register struct blockvector
*bl
;
1320 register struct block
*block
= get_frame_block (fi
);
1321 register int values_printed
= 0;
1322 int index
, have_default
= 0;
1323 char *blocks_printed
;
1324 CORE_ADDR pc
= fi
->pc
;
1328 fprintf_filtered (stream
, "No symbol table info available.\n");
1332 bl
= blockvector_for_pc (BLOCK_END (block
) - 4, &index
);
1333 blocks_printed
= (char *) alloca (BLOCKVECTOR_NBLOCKS (bl
) * sizeof (char));
1334 memset (blocks_printed
, 0, BLOCKVECTOR_NBLOCKS (bl
) * sizeof (char));
1338 CORE_ADDR end
= BLOCK_END (block
) - 4;
1341 if (bl
!= blockvector_for_pc (end
, &index
))
1342 error ("blockvector blotch");
1343 if (BLOCKVECTOR_BLOCK (bl
, index
) != block
)
1344 error ("blockvector botch");
1345 last_index
= BLOCKVECTOR_NBLOCKS (bl
);
1348 /* Don't print out blocks that have gone by. */
1349 while (index
< last_index
1350 && BLOCK_END (BLOCKVECTOR_BLOCK (bl
, index
)) < pc
)
1353 while (index
< last_index
1354 && BLOCK_END (BLOCKVECTOR_BLOCK (bl
, index
)) < end
)
1356 if (blocks_printed
[index
] == 0)
1358 if (print_block_frame_labels (BLOCKVECTOR_BLOCK (bl
, index
), &have_default
, stream
))
1360 blocks_printed
[index
] = 1;
1366 if (values_printed
&& this_level_only
)
1369 /* After handling the function's top-level block, stop.
1370 Don't continue to its superblock, the block of
1371 per-file symbols. */
1372 if (BLOCK_FUNCTION (block
))
1374 block
= BLOCK_SUPERBLOCK (block
);
1377 if (!values_printed
&& !this_level_only
)
1379 fprintf_filtered (stream
, "No catches.\n");
1385 locals_info (char *args
, int from_tty
)
1387 if (!selected_frame
)
1388 error ("No frame selected.");
1389 print_frame_local_vars (selected_frame
, 0, gdb_stdout
);
1393 catch_info (char *ignore
, int from_tty
)
1395 struct symtab_and_line
*sal
;
1397 /* Check for target support for exception handling */
1398 sal
= target_enable_exception_callback (EX_EVENT_CATCH
, 1);
1401 /* Currently not handling this */
1402 /* Ideally, here we should interact with the C++ runtime
1403 system to find the list of active handlers, etc. */
1404 fprintf_filtered (gdb_stdout
, "Info catch not supported with this target/compiler combination.\n");
1406 if (!selected_frame
)
1407 error ("No frame selected.");
1412 /* Assume g++ compiled code -- old v 4.16 behaviour */
1413 if (!selected_frame
)
1414 error ("No frame selected.");
1416 print_frame_label_vars (selected_frame
, 0, gdb_stdout
);
1421 print_frame_arg_vars (register struct frame_info
*fi
,
1422 register struct ui_file
*stream
)
1424 struct symbol
*func
= get_frame_function (fi
);
1425 register struct block
*b
;
1427 register struct symbol
*sym
, *sym2
;
1428 register int values_printed
= 0;
1432 fprintf_filtered (stream
, "No symbol table info available.\n");
1436 b
= SYMBOL_BLOCK_VALUE (func
);
1437 ALL_BLOCK_SYMBOLS (b
, i
, sym
)
1439 switch (SYMBOL_CLASS (sym
))
1445 case LOC_REGPARM_ADDR
:
1446 case LOC_BASEREG_ARG
:
1448 fputs_filtered (SYMBOL_SOURCE_NAME (sym
), stream
);
1449 fputs_filtered (" = ", stream
);
1451 /* We have to look up the symbol because arguments can have
1452 two entries (one a parameter, one a local) and the one we
1453 want is the local, which lookup_symbol will find for us.
1454 This includes gcc1 (not gcc2) on the sparc when passing a
1455 small structure and gcc2 when the argument type is float
1456 and it is passed as a double and converted to float by
1457 the prologue (in the latter case the type of the LOC_ARG
1458 symbol is double and the type of the LOC_LOCAL symbol is
1459 float). There are also LOC_ARG/LOC_REGISTER pairs which
1460 are not combined in symbol-reading. */
1462 sym2
= lookup_symbol (SYMBOL_NAME (sym
),
1463 b
, VAR_NAMESPACE
, (int *) NULL
, (struct symtab
**) NULL
);
1464 print_variable_value (sym2
, fi
, stream
);
1465 fprintf_filtered (stream
, "\n");
1469 /* Don't worry about things which aren't arguments. */
1473 if (!values_printed
)
1475 fprintf_filtered (stream
, "No arguments.\n");
1480 args_info (char *ignore
, int from_tty
)
1482 if (!selected_frame
)
1483 error ("No frame selected.");
1484 print_frame_arg_vars (selected_frame
, gdb_stdout
);
1489 args_plus_locals_info (char *ignore
, int from_tty
)
1491 args_info (ignore
, from_tty
);
1492 locals_info (ignore
, from_tty
);
1496 /* Select frame FI, and note that its stack level is LEVEL.
1497 LEVEL may be -1 if an actual level number is not known. */
1500 select_frame (struct frame_info
*fi
, int level
)
1502 register struct symtab
*s
;
1504 selected_frame
= fi
;
1505 selected_frame_level
= level
;
1506 if (selected_frame_level_changed_hook
)
1507 selected_frame_level_changed_hook (level
);
1509 /* Ensure that symbols for this frame are read in. Also, determine the
1510 source language of this frame, and switch to it if desired. */
1513 s
= find_pc_symtab (fi
->pc
);
1515 && s
->language
!= current_language
->la_language
1516 && s
->language
!= language_unknown
1517 && language_mode
== language_mode_auto
)
1519 set_language (s
->language
);
1525 /* Select frame FI, noting that its stack level is LEVEL. Also print
1526 the stack frame and show the source if this is the tui version. */
1528 select_and_print_frame (struct frame_info
*fi
, int level
)
1530 select_frame (fi
, level
);
1533 print_stack_frame (fi
, level
, 1);
1538 /* Store the selected frame and its level into *FRAMEP and *LEVELP.
1539 If there is no selected frame, *FRAMEP is set to NULL. */
1542 record_selected_frame (CORE_ADDR
*frameaddrp
, int *levelp
)
1544 *frameaddrp
= selected_frame
? selected_frame
->frame
: 0;
1545 *levelp
= selected_frame_level
;
1548 /* Return the symbol-block in which the selected frame is executing.
1549 Can return zero under various legitimate circumstances. */
1552 get_selected_block (void)
1554 if (!target_has_stack
)
1557 if (!selected_frame
)
1558 return get_current_block ();
1559 return get_frame_block (selected_frame
);
1562 /* Find a frame a certain number of levels away from FRAME.
1563 LEVEL_OFFSET_PTR points to an int containing the number of levels.
1564 Positive means go to earlier frames (up); negative, the reverse.
1565 The int that contains the number of levels is counted toward
1566 zero as the frames for those levels are found.
1567 If the top or bottom frame is reached, that frame is returned,
1568 but the final value of *LEVEL_OFFSET_PTR is nonzero and indicates
1569 how much farther the original request asked to go. */
1572 find_relative_frame (register struct frame_info
*frame
,
1573 register int *level_offset_ptr
)
1575 register struct frame_info
*prev
;
1576 register struct frame_info
*frame1
;
1578 /* Going up is simple: just do get_prev_frame enough times
1579 or until initial frame is reached. */
1580 while (*level_offset_ptr
> 0)
1582 prev
= get_prev_frame (frame
);
1585 (*level_offset_ptr
)--;
1588 /* Going down is just as simple. */
1589 if (*level_offset_ptr
< 0)
1591 while (*level_offset_ptr
< 0)
1593 frame1
= get_next_frame (frame
);
1597 (*level_offset_ptr
)++;
1603 /* The "select_frame" command. With no arg, NOP.
1604 With arg LEVEL_EXP, select the frame at level LEVEL if it is a
1605 valid level. Otherwise, treat level_exp as an address expression
1606 and select it. See parse_frame_specification for more info on proper
1607 frame expressions. */
1612 select_frame_command_wrapper (char *level_exp
, int from_tty
)
1614 select_frame_command (level_exp
, from_tty
);
1618 select_frame_command (char *level_exp
, int from_tty
)
1620 register struct frame_info
*frame
, *frame1
;
1621 unsigned int level
= 0;
1623 if (!target_has_stack
)
1624 error ("No stack.");
1626 frame
= parse_frame_specification (level_exp
);
1628 /* Try to figure out what level this frame is. But if there is
1629 no current stack, don't error out -- let the user set one. */
1631 if (get_current_frame ())
1633 for (frame1
= get_prev_frame (0);
1634 frame1
&& frame1
!= frame
;
1635 frame1
= get_prev_frame (frame1
))
1642 select_frame (frame
, level
);
1645 /* The "frame" command. With no arg, print selected frame briefly.
1646 With arg, behaves like select_frame and then prints the selected
1650 frame_command (char *level_exp
, int from_tty
)
1652 select_frame_command (level_exp
, from_tty
);
1653 show_and_print_stack_frame (selected_frame
, selected_frame_level
, 1);
1656 /* The XDB Compatibility command to print the current frame. */
1659 current_frame_command (char *level_exp
, int from_tty
)
1661 if (target_has_stack
== 0 || selected_frame
== 0)
1662 error ("No stack.");
1663 print_only_stack_frame (selected_frame
, selected_frame_level
, 1);
1666 /* Select the frame up one or COUNT stack levels
1667 from the previously selected frame, and print it briefly. */
1671 up_silently_base (char *count_exp
)
1673 register struct frame_info
*fi
;
1674 int count
= 1, count1
;
1676 count
= parse_and_eval_long (count_exp
);
1679 if (target_has_stack
== 0 || selected_frame
== 0)
1680 error ("No stack.");
1682 fi
= find_relative_frame (selected_frame
, &count1
);
1683 if (count1
!= 0 && count_exp
== 0)
1684 error ("Initial frame selected; you cannot go up.");
1685 select_frame (fi
, selected_frame_level
+ count
- count1
);
1689 up_silently_command (char *count_exp
, int from_tty
)
1691 up_silently_base (count_exp
);
1695 up_command (char *count_exp
, int from_tty
)
1697 up_silently_base (count_exp
);
1698 show_and_print_stack_frame (selected_frame
, selected_frame_level
, 1);
1701 /* Select the frame down one or COUNT stack levels
1702 from the previously selected frame, and print it briefly. */
1706 down_silently_base (char *count_exp
)
1708 register struct frame_info
*frame
;
1709 int count
= -1, count1
;
1711 count
= -parse_and_eval_long (count_exp
);
1714 if (target_has_stack
== 0 || selected_frame
== 0)
1715 error ("No stack.");
1717 frame
= find_relative_frame (selected_frame
, &count1
);
1718 if (count1
!= 0 && count_exp
== 0)
1721 /* We only do this if count_exp is not specified. That way "down"
1722 means to really go down (and let me know if that is
1723 impossible), but "down 9999" can be used to mean go all the way
1724 down without getting an error. */
1726 error ("Bottom (i.e., innermost) frame selected; you cannot go down.");
1729 select_frame (frame
, selected_frame_level
+ count
- count1
);
1734 down_silently_command (char *count_exp
, int from_tty
)
1736 down_silently_base (count_exp
);
1740 down_command (char *count_exp
, int from_tty
)
1742 down_silently_base (count_exp
);
1743 show_and_print_stack_frame (selected_frame
, selected_frame_level
, 1);
1748 return_command_wrapper (char *retval_exp
, int from_tty
)
1750 return_command (retval_exp
, from_tty
);
1754 return_command (char *retval_exp
, int from_tty
)
1756 struct symbol
*thisfun
;
1757 CORE_ADDR selected_frame_addr
;
1758 CORE_ADDR selected_frame_pc
;
1759 struct frame_info
*frame
;
1760 struct value
*return_value
= NULL
;
1762 if (selected_frame
== NULL
)
1763 error ("No selected frame.");
1764 thisfun
= get_frame_function (selected_frame
);
1765 selected_frame_addr
= FRAME_FP (selected_frame
);
1766 selected_frame_pc
= selected_frame
->pc
;
1768 /* Compute the return value (if any -- possibly getting errors here). */
1772 struct type
*return_type
= NULL
;
1774 return_value
= parse_and_eval (retval_exp
);
1776 /* Cast return value to the return type of the function. */
1777 if (thisfun
!= NULL
)
1778 return_type
= TYPE_TARGET_TYPE (SYMBOL_TYPE (thisfun
));
1779 if (return_type
== NULL
)
1780 return_type
= builtin_type_int
;
1781 return_value
= value_cast (return_type
, return_value
);
1783 /* Make sure we have fully evaluated it, since
1784 it might live in the stack frame we're about to pop. */
1785 if (VALUE_LAZY (return_value
))
1786 value_fetch_lazy (return_value
);
1789 /* If interactive, require confirmation. */
1795 if (!query ("Make %s return now? ", SYMBOL_SOURCE_NAME (thisfun
)))
1797 error ("Not confirmed.");
1801 else if (!query ("Make selected stack frame return now? "))
1802 error ("Not confirmed.");
1805 /* Do the real work. Pop until the specified frame is current. We
1806 use this method because the selected_frame is not valid after
1807 a POP_FRAME. The pc comparison makes this work even if the
1808 selected frame shares its fp with another frame. */
1810 while (selected_frame_addr
!= (frame
= get_current_frame ())->frame
1811 || selected_frame_pc
!= frame
->pc
)
1814 /* Then pop that frame. */
1818 /* Compute the return value (if any) and store in the place
1819 for return values. */
1822 set_return_value (return_value
);
1824 /* If we are at the end of a call dummy now, pop the dummy frame too. */
1826 if (CALL_DUMMY_HAS_COMPLETED (read_pc(), read_sp (),
1827 FRAME_FP (get_current_frame ())))
1830 /* If interactive, print the frame that is now current. */
1833 frame_command ("0", 1);
1835 select_frame_command ("0", 0);
1838 /* Sets the scope to input function name, provided that the
1839 function is within the current stack frame */
1841 struct function_bounds
1843 CORE_ADDR low
, high
;
1846 static void func_command (char *arg
, int from_tty
);
1848 func_command (char *arg
, int from_tty
)
1850 struct frame_info
*fp
;
1852 struct symtabs_and_lines sals
;
1855 struct function_bounds
*func_bounds
= (struct function_bounds
*) NULL
;
1857 if (arg
!= (char *) NULL
)
1860 fp
= parse_frame_specification ("0");
1861 sals
= decode_line_spec (arg
, 1);
1862 func_bounds
= (struct function_bounds
*) xmalloc (
1863 sizeof (struct function_bounds
) * sals
.nelts
);
1864 for (i
= 0; (i
< sals
.nelts
&& !found
); i
++)
1866 if (sals
.sals
[i
].pc
== (CORE_ADDR
) 0 ||
1867 find_pc_partial_function (sals
.sals
[i
].pc
,
1869 &func_bounds
[i
].low
,
1870 &func_bounds
[i
].high
) == 0)
1872 func_bounds
[i
].low
=
1873 func_bounds
[i
].high
= (CORE_ADDR
) NULL
;
1879 for (i
= 0; (i
< sals
.nelts
&& !found
); i
++)
1880 found
= (fp
->pc
>= func_bounds
[i
].low
&&
1881 fp
->pc
< func_bounds
[i
].high
);
1885 fp
= find_relative_frame (fp
, &level
);
1888 while (!found
&& level
== 0);
1891 xfree (func_bounds
);
1894 printf_filtered ("'%s' not within current stack frame.\n", arg
);
1895 else if (fp
!= selected_frame
)
1896 select_and_print_frame (fp
, level
);
1899 /* Gets the language of the current frame. */
1902 get_frame_language (void)
1904 register struct symtab
*s
;
1905 enum language flang
; /* The language of the current frame */
1909 s
= find_pc_symtab (selected_frame
->pc
);
1911 flang
= s
->language
;
1913 flang
= language_unknown
;
1916 flang
= language_unknown
;
1922 _initialize_stack (void)
1925 backtrace_limit
= 30;
1928 add_com ("return", class_stack
, return_command
,
1929 "Make selected stack frame return to its caller.\n\
1930 Control remains in the debugger, but when you continue\n\
1931 execution will resume in the frame above the one now selected.\n\
1932 If an argument is given, it is an expression for the value to return.");
1934 add_com ("up", class_stack
, up_command
,
1935 "Select and print stack frame that called this one.\n\
1936 An argument says how many frames up to go.");
1937 add_com ("up-silently", class_support
, up_silently_command
,
1938 "Same as the `up' command, but does not print anything.\n\
1939 This is useful in command scripts.");
1941 add_com ("down", class_stack
, down_command
,
1942 "Select and print stack frame called by this one.\n\
1943 An argument says how many frames down to go.");
1944 add_com_alias ("do", "down", class_stack
, 1);
1945 add_com_alias ("dow", "down", class_stack
, 1);
1946 add_com ("down-silently", class_support
, down_silently_command
,
1947 "Same as the `down' command, but does not print anything.\n\
1948 This is useful in command scripts.");
1950 add_com ("frame", class_stack
, frame_command
,
1951 "Select and print a stack frame.\n\
1952 With no argument, print the selected stack frame. (See also \"info frame\").\n\
1953 An argument specifies the frame to select.\n\
1954 It can be a stack frame number or the address of the frame.\n\
1955 With argument, nothing is printed if input is coming from\n\
1956 a command file or a user-defined command.");
1958 add_com_alias ("f", "frame", class_stack
, 1);
1962 add_com ("L", class_stack
, current_frame_command
,
1963 "Print the current stack frame.\n");
1964 add_com_alias ("V", "frame", class_stack
, 1);
1966 add_com ("select-frame", class_stack
, select_frame_command
,
1967 "Select a stack frame without printing anything.\n\
1968 An argument specifies the frame to select.\n\
1969 It can be a stack frame number or the address of the frame.\n");
1971 add_com ("backtrace", class_stack
, backtrace_command
,
1972 "Print backtrace of all stack frames, or innermost COUNT frames.\n\
1973 With a negative argument, print outermost -COUNT frames.\n\
1974 Use of the 'full' qualifier also prints the values of the local variables.\n");
1975 add_com_alias ("bt", "backtrace", class_stack
, 0);
1978 add_com_alias ("t", "backtrace", class_stack
, 0);
1979 add_com ("T", class_stack
, backtrace_full_command
,
1980 "Print backtrace of all stack frames, or innermost COUNT frames \n\
1981 and the values of the local variables.\n\
1982 With a negative argument, print outermost -COUNT frames.\n\
1983 Usage: T <count>\n");
1986 add_com_alias ("where", "backtrace", class_alias
, 0);
1987 add_info ("stack", backtrace_command
,
1988 "Backtrace of the stack, or innermost COUNT frames.");
1989 add_info_alias ("s", "stack", 1);
1990 add_info ("frame", frame_info
,
1991 "All about selected stack frame, or frame at ADDR.");
1992 add_info_alias ("f", "frame", 1);
1993 add_info ("locals", locals_info
,
1994 "Local variables of current stack frame.");
1995 add_info ("args", args_info
,
1996 "Argument variables of current stack frame.");
1998 add_com ("l", class_info
, args_plus_locals_info
,
1999 "Argument and local variables of current stack frame.");
2002 add_com ("func", class_stack
, func_command
,
2003 "Select the stack frame that contains <func>.\nUsage: func <name>\n");
2005 add_info ("catch", catch_info
,
2006 "Exceptions that can be caught in the current stack frame.");
2009 add_cmd ("backtrace-limit", class_stack
, set_backtrace_limit_command
,
2010 "Specify maximum number of frames for \"backtrace\" to print by default.",
2012 add_info ("backtrace-limit", backtrace_limit_info
,
2013 "The maximum number of frames for \"backtrace\" to print by default.");