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"
44 /* Prototypes for exported functions. */
46 void args_info (char *, int);
48 void locals_info (char *, int);
50 void (*selected_frame_level_changed_hook
) (int);
52 void _initialize_stack (void);
54 /* Prototypes for local functions. */
56 static void return_command (char *, int);
58 static void down_command (char *, int);
60 static void down_silently_base (char *);
62 static void down_silently_command (char *, int);
64 static void up_command (char *, int);
66 static void up_silently_base (char *);
68 static void up_silently_command (char *, int);
70 void frame_command (char *, int);
72 static void current_frame_command (char *, int);
74 static void select_frame_command (char *, int);
76 static void print_frame_arg_vars (struct frame_info
*, struct ui_file
*);
78 static void catch_info (char *, int);
80 static void args_plus_locals_info (char *, int);
82 static void print_frame_label_vars (struct frame_info
*, int,
85 static void print_frame_local_vars (struct frame_info
*, int,
88 static int print_block_frame_labels (struct block
*, int *,
91 static int print_block_frame_locals (struct block
*,
96 static void print_frame (struct frame_info
*fi
,
100 struct symtab_and_line sal
);
102 static void print_frame_info_base (struct frame_info
*, int, int, int);
104 static void print_stack_frame_base (struct frame_info
*, int, int);
106 static void backtrace_command (char *, int);
108 struct frame_info
*parse_frame_specification (char *);
110 static void frame_info (char *, int);
112 extern int addressprint
; /* Print addresses, or stay symbolic only? */
113 extern int info_verbose
; /* Verbosity of symbol reading msgs */
114 extern int lines_to_list
; /* # of lines "list" command shows by default */
116 /* The "selected" stack frame is used by default for local and arg access.
117 May be zero, for no selected frame. */
119 struct frame_info
*selected_frame
;
121 /* Level of the selected frame:
122 0 for innermost, 1 for its caller, ...
123 or -1 for frame specified by address with no defined level. */
125 int selected_frame_level
;
127 /* Zero means do things normally; we are interacting directly with the
128 user. One means print the full filename and linenumber when a
129 frame is printed, and do so in a format emacs18/emacs19.22 can
130 parse. Two means print similar annotations, but in many more
131 cases and in a slightly different syntax. */
133 int annotation_level
= 0;
136 struct print_stack_frame_args
138 struct frame_info
*fi
;
144 static int print_stack_frame_base_stub (char *);
146 /* Show and print the frame arguments.
147 Pass the args the way catch_errors wants them. */
148 static int show_and_print_stack_frame_stub (void *args
);
150 show_and_print_stack_frame_stub (void *args
)
152 struct print_stack_frame_args
*p
= (struct print_stack_frame_args
*) args
;
154 /* Reversed order of these so tuiDo() doesn't occur
155 * in the middle of "Breakpoint 1 ... [location]" printing = RT
158 print_frame_info_base (p
->fi
, p
->level
, p
->source
, p
->args
);
159 print_frame_info (p
->fi
, p
->level
, p
->source
, p
->args
);
164 /* Show or print the frame arguments.
165 Pass the args the way catch_errors wants them. */
166 static int print_stack_frame_stub (void *args
);
168 print_stack_frame_stub (void *args
)
170 struct print_stack_frame_args
*p
= (struct print_stack_frame_args
*) args
;
173 print_frame_info (p
->fi
, p
->level
, p
->source
, p
->args
);
175 print_frame_info_base (p
->fi
, p
->level
, p
->source
, p
->args
);
179 /* Print a stack frame briefly. FRAME_INFI should be the frame info
180 and LEVEL should be its level in the stack (or -1 for level not
183 /* Pass the args the way catch_errors wants them. */
185 print_stack_frame_base_stub (char *args
)
187 struct print_stack_frame_args
*p
= (struct print_stack_frame_args
*) args
;
189 print_frame_info_base (p
->fi
, p
->level
, p
->source
, p
->args
);
193 /* print the frame arguments to the terminal.
194 Pass the args the way catch_errors wants them. */
195 static int print_only_stack_frame_stub (void *);
197 print_only_stack_frame_stub (void *args
)
199 struct print_stack_frame_args
*p
= (struct print_stack_frame_args
*) args
;
201 print_frame_info_base (p
->fi
, p
->level
, p
->source
, p
->args
);
205 /* Print a stack frame briefly. FRAME_INFI should be the frame info
206 and LEVEL should be its level in the stack (or -1 for level not defined).
207 This prints the level, the function executing, the arguments,
208 and the file name and line number.
209 If the pc is not at the beginning of the source line,
210 the actual pc is printed at the beginning.
212 If SOURCE is 1, print the source line as well.
213 If SOURCE is -1, print ONLY the source line. */
216 print_stack_frame_base (struct frame_info
*fi
, int level
, int source
)
218 struct print_stack_frame_args args
;
222 args
.source
= source
;
225 catch_errors (print_stack_frame_stub
, &args
, "", RETURN_MASK_ALL
);
228 /* Show and print a stack frame briefly. FRAME_INFI should be the frame info
229 and LEVEL should be its level in the stack (or -1 for level not defined).
230 This prints the level, the function executing, the arguments,
231 and the file name and line number.
232 If the pc is not at the beginning of the source line,
233 the actual pc is printed at the beginning.
235 If SOURCE is 1, print the source line as well.
236 If SOURCE is -1, print ONLY the source line. */
239 show_and_print_stack_frame (struct frame_info
*fi
, int level
, int source
)
241 struct print_stack_frame_args args
;
245 args
.source
= source
;
248 catch_errors (show_and_print_stack_frame_stub
, &args
, "", RETURN_MASK_ALL
);
252 /* Show or print a stack frame briefly. FRAME_INFI should be the frame info
253 and LEVEL should be its level in the stack (or -1 for level not defined).
254 This prints the level, the function executing, the arguments,
255 and the file name and line number.
256 If the pc is not at the beginning of the source line,
257 the actual pc is printed at the beginning.
259 If SOURCE is 1, print the source line as well.
260 If SOURCE is -1, print ONLY the source line. */
263 print_stack_frame (struct frame_info
*fi
, int level
, int source
)
265 struct print_stack_frame_args args
;
269 args
.source
= source
;
272 catch_errors (print_stack_frame_stub
, (char *) &args
, "", RETURN_MASK_ALL
);
275 /* Print a stack frame briefly. FRAME_INFI should be the frame info
276 and LEVEL should be its level in the stack (or -1 for level not defined).
277 This prints the level, the function executing, the arguments,
278 and the file name and line number.
279 If the pc is not at the beginning of the source line,
280 the actual pc is printed at the beginning.
282 If SOURCE is 1, print the source line as well.
283 If SOURCE is -1, print ONLY the source line. */
286 print_only_stack_frame (struct frame_info
*fi
, int level
, int source
)
288 struct print_stack_frame_args args
;
292 args
.source
= source
;
295 catch_errors (print_only_stack_frame_stub
, &args
, "", RETURN_MASK_ALL
);
298 struct print_args_args
301 struct frame_info
*fi
;
302 struct ui_file
*stream
;
305 static int print_args_stub (PTR
);
307 /* Pass the args the way catch_errors wants them. */
310 print_args_stub (PTR args
)
313 struct print_args_args
*p
= (struct print_args_args
*) args
;
315 numargs
= FRAME_NUM_ARGS (p
->fi
);
316 print_frame_args (p
->func
, p
->fi
, numargs
, p
->stream
);
320 /* Print information about a frame for frame "fi" at level "level".
321 Used in "where" output, also used to emit breakpoint or step
323 LEVEL is the level of the frame, or -1 if it is the
324 innermost frame but we don't want to print the level.
325 The meaning of the SOURCE argument is:
326 SRC_LINE: Print only source line
327 LOCATION: Print only location
328 LOC_AND_SRC: Print location and source line. */
331 print_frame_info_base (struct frame_info
*fi
, int level
, int source
, int args
)
333 struct symtab_and_line sal
;
338 char buf
[MAX_REGISTER_RAW_SIZE
];
341 /* On the 68k, this spends too much time in m68k_find_saved_regs. */
343 /* Get the value of SP_REGNUM relative to the frame. */
344 get_saved_register (buf
, (int *) NULL
, (CORE_ADDR
*) NULL
,
345 FRAME_INFO_ID (fi
), SP_REGNUM
, (enum lval_type
*) NULL
);
346 sp
= extract_address (buf
, REGISTER_RAW_SIZE (SP_REGNUM
));
348 /* This is not a perfect test, because if a function alloca's some
349 memory, puts some code there, and then jumps into it, then the test
350 will succeed even though there is no call dummy. Probably best is
351 to check for a bp_call_dummy breakpoint. */
352 if (PC_IN_CALL_DUMMY (fi
->pc
, sp
, fi
->frame
))
354 if (frame_in_dummy (fi
))
357 annotate_frame_begin (level
== -1 ? 0 : level
, fi
->pc
);
359 /* Do this regardless of SOURCE because we don't have any source
360 to list for this frame. */
362 printf_filtered ("#%-2d ", level
);
363 annotate_function_call ();
364 printf_filtered ("<function called from gdb>\n");
365 annotate_frame_end ();
368 if (fi
->signal_handler_caller
)
370 annotate_frame_begin (level
== -1 ? 0 : level
, fi
->pc
);
372 /* Do this regardless of SOURCE because we don't have any source
373 to list for this frame. */
375 printf_filtered ("#%-2d ", level
);
376 annotate_signal_handler_caller ();
377 printf_filtered ("<signal handler called>\n");
378 annotate_frame_end ();
382 /* If fi is not the innermost frame, that normally means that fi->pc
383 points to *after* the call instruction, and we want to get the line
384 containing the call, never the next line. But if the next frame is
385 a signal_handler_caller or a dummy frame, then the next frame was
386 not entered as the result of a call, and we want to get the line
387 containing fi->pc. */
389 find_pc_line (fi
->pc
,
391 && !fi
->next
->signal_handler_caller
392 && !frame_in_dummy (fi
->next
));
394 location_print
= (source
== LOCATION
395 || source
== LOC_AND_ADDRESS
396 || source
== SRC_AND_LOC
);
398 if (location_print
|| !sal
.symtab
)
399 print_frame (fi
, level
, source
, args
, sal
);
401 source_print
= (source
== SRC_LINE
|| source
== SRC_AND_LOC
);
403 if (source_print
&& sal
.symtab
)
406 int mid_statement
= (source
== SRC_LINE
) && (fi
->pc
!= sal
.pc
);
408 if (annotation_level
)
409 done
= identify_source_line (sal
.symtab
, sal
.line
, mid_statement
,
413 if (addressprint
&& mid_statement
&& !tui_version
)
416 ui_out_field_core_addr (uiout
, "addr", fi
->pc
);
417 ui_out_text (uiout
, "\t");
419 print_address_numeric (fi
->pc
, 1, gdb_stdout
);
420 printf_filtered ("\t");
423 if (print_frame_info_listing_hook
)
424 print_frame_info_listing_hook (sal
.symtab
, sal
.line
, sal
.line
+ 1, 0);
425 else if (!tui_version
)
426 print_source_lines (sal
.symtab
, sal
.line
, sal
.line
+ 1, 0);
428 current_source_line
= max (sal
.line
- lines_to_list
/ 2, 1);
432 set_default_breakpoint (1, fi
->pc
, sal
.symtab
, sal
.line
);
434 annotate_frame_end ();
436 gdb_flush (gdb_stdout
);
440 print_frame (struct frame_info
*fi
,
444 struct symtab_and_line sal
)
447 register char *funname
= 0;
448 enum language funlang
= language_unknown
;
450 struct ui_stream
*stb
;
451 struct cleanup
*old_chain
;
452 struct cleanup
*list_chain
;
454 stb
= ui_out_stream_new (uiout
);
455 old_chain
= make_cleanup_ui_out_stream_delete (stb
);
458 func
= find_pc_function (fi
->pc
);
461 /* In certain pathological cases, the symtabs give the wrong
462 function (when we are in the first function in a file which
463 is compiled without debugging symbols, the previous function
464 is compiled with debugging symbols, and the "foo.o" symbol
465 that is supposed to tell us where the file with debugging symbols
466 ends has been truncated by ar because it is longer than 15
467 characters). This also occurs if the user uses asm() to create
468 a function but not stabs for it (in a file compiled -g).
470 So look in the minimal symbol tables as well, and if it comes
471 up with a larger address for the function use that instead.
472 I don't think this can ever cause any problems; there shouldn't
473 be any minimal symbols in the middle of a function; if this is
474 ever changed many parts of GDB will need to be changed (and we'll
475 create a find_pc_minimal_function or some such). */
477 struct minimal_symbol
*msymbol
= lookup_minimal_symbol_by_pc (fi
->pc
);
479 && (SYMBOL_VALUE_ADDRESS (msymbol
)
480 > BLOCK_START (SYMBOL_BLOCK_VALUE (func
))))
483 /* There is no particular reason to think the line number
484 information is wrong. Someone might have just put in
485 a label with asm() but left the line numbers alone. */
486 /* In this case we have no way of knowing the source file
487 and line number, so don't print them. */
490 /* We also don't know anything about the function besides
491 its address and name. */
493 funname
= SYMBOL_NAME (msymbol
);
494 funlang
= SYMBOL_LANGUAGE (msymbol
);
498 /* I'd like to use SYMBOL_SOURCE_NAME() here, to display the
499 demangled name that we already have stored in the symbol
500 table, but we stored a version with DMGL_PARAMS turned
501 on, and here we don't want to display parameters. So call
502 the demangler again, with DMGL_ANSI only. (Yes, I know
503 that printf_symbol_filtered() will again try to demangle
504 the name on the fly, but the issue is that if
505 cplus_demangle() fails here, it'll fail there too. So we
506 want to catch the failure ("demangled==NULL" case below)
507 here, while we still have our hands on the function
510 funname
= SYMBOL_NAME (func
);
511 funlang
= SYMBOL_LANGUAGE (func
);
512 if (funlang
== language_cplus
)
514 demangled
= cplus_demangle (funname
, DMGL_ANSI
);
515 if (demangled
== NULL
)
516 /* If the demangler fails, try the demangled name from
517 the symbol table. This'll have parameters, but
518 that's preferable to diplaying a mangled name. */
519 funname
= SYMBOL_SOURCE_NAME (func
);
525 struct minimal_symbol
*msymbol
= lookup_minimal_symbol_by_pc (fi
->pc
);
528 funname
= SYMBOL_NAME (msymbol
);
529 funlang
= SYMBOL_LANGUAGE (msymbol
);
533 annotate_frame_begin (level
== -1 ? 0 : level
, fi
->pc
);
536 ui_out_list_begin (uiout
, "frame");
537 list_chain
= make_cleanup_ui_out_list_end (uiout
);
543 ui_out_text (uiout
, "#");
544 ui_out_field_fmt (uiout
, "level", "%-2d", level
);
545 ui_out_spaces (uiout
, 1);
547 printf_filtered ("#%-2d ", level
);
551 if (fi
->pc
!= sal
.pc
|| !sal
.symtab
|| source
== LOC_AND_ADDRESS
)
553 annotate_frame_address ();
555 ui_out_field_core_addr (uiout
, "addr", fi
->pc
);
556 annotate_frame_address_end ();
557 ui_out_text (uiout
, " in ");
559 print_address_numeric (fi
->pc
, 1, gdb_stdout
);
560 annotate_frame_address_end ();
561 printf_filtered (" in ");
564 annotate_frame_function_name ();
566 fprintf_symbol_filtered (stb
->stream
, funname
? funname
: "??", funlang
,
568 ui_out_field_stream (uiout
, "func", stb
);
569 ui_out_wrap_hint (uiout
, " ");
571 fprintf_symbol_filtered (gdb_stdout
, funname
? funname
: "??", funlang
,
575 annotate_frame_args ();
578 ui_out_text (uiout
, " (");
580 fputs_filtered (" (", gdb_stdout
);
584 struct print_args_args args
;
587 args
.stream
= gdb_stdout
;
589 ui_out_list_begin (uiout
, "args");
590 catch_errors (print_args_stub
, &args
, "", RETURN_MASK_ALL
);
591 /* FIXME: args must be a list. If one argument is a string it will
592 have " that will not be properly escaped. */
593 ui_out_list_end (uiout
);
595 catch_errors (print_args_stub
, &args
, "", RETURN_MASK_ALL
);
600 ui_out_text (uiout
, ")");
602 printf_filtered (")");
604 if (sal
.symtab
&& sal
.symtab
->filename
)
606 annotate_frame_source_begin ();
608 ui_out_wrap_hint (uiout
, " ");
609 ui_out_text (uiout
, " at ");
610 annotate_frame_source_file ();
611 ui_out_field_string (uiout
, "file", sal
.symtab
->filename
);
612 annotate_frame_source_file_end ();
613 ui_out_text (uiout
, ":");
614 annotate_frame_source_line ();
615 ui_out_field_int (uiout
, "line", sal
.line
);
618 printf_filtered (" at ");
619 annotate_frame_source_file ();
620 printf_filtered ("%s", sal
.symtab
->filename
);
621 annotate_frame_source_file_end ();
622 printf_filtered (":");
623 annotate_frame_source_line ();
624 printf_filtered ("%d", sal
.line
);
626 annotate_frame_source_end ();
630 if (!funname
|| (!sal
.symtab
|| !sal
.symtab
->filename
))
632 char *lib
= PC_SOLIB (fi
->pc
);
635 annotate_frame_where ();
637 ui_out_wrap_hint (uiout
, " ");
638 ui_out_text (uiout
, " from ");
639 ui_out_field_string (uiout
, "from", lib
);
642 printf_filtered (" from %s", lib
);
646 #endif /* PC_SOLIB */
649 /* do_cleanups will call ui_out_list_end() for us. */
650 do_cleanups (list_chain
);
651 ui_out_text (uiout
, "\n");
652 do_cleanups (old_chain
);
654 printf_filtered ("\n");
661 stack_publish_stopped_with_no_frame (void)
663 TUIDO (((TuiOpaqueFuncPtr
) tuiUpdateOnEnd
));
669 /* Show or print the frame info. If this is the tui, it will be shown in
670 the source display */
672 print_frame_info (struct frame_info
*fi
, register int level
, int source
,
676 print_frame_info_base (fi
, level
, source
, args
);
679 if (fi
&& (frame_in_dummy (fi
) || fi
->signal_handler_caller
))
680 print_frame_info_base (fi
, level
, source
, args
);
683 TUIDO (((TuiOpaqueFuncPtr
) tui_vShowFrameInfo
, fi
));
688 /* Show the frame info. If this is the tui, it will be shown in
689 the source display otherwise, nothing is done */
691 show_stack_frame (struct frame_info
*fi
)
693 TUIDO (((TuiOpaqueFuncPtr
) tui_vShowFrameInfo
, fi
));
697 /* Read a frame specification in whatever the appropriate format is.
698 Call error() if the specification is in any way invalid (i.e.
699 this function never returns NULL). */
702 parse_frame_specification (char *frame_exp
)
706 CORE_ADDR args
[MAXARGS
];
711 char *addr_string
, *p
;
712 struct cleanup
*tmp_cleanup
;
714 while (*frame_exp
== ' ')
719 if (numargs
> MAXARGS
)
720 error ("Too many args in frame specification");
721 /* Parse an argument. */
722 for (p
= frame_exp
; *p
&& *p
!= ' '; p
++)
724 addr_string
= savestring (frame_exp
, p
- frame_exp
);
729 tmp_cleanup
= make_cleanup (xfree
, addr_string
);
731 /* NOTE: we call parse_and_eval and then both
732 value_as_long and value_as_pointer rather than calling
733 parse_and_eval_long and parse_and_eval_address because
734 of the issue of potential side effects from evaluating
736 vp
= parse_and_eval (addr_string
);
738 level
= value_as_long (vp
);
740 args
[numargs
++] = value_as_pointer (vp
);
741 do_cleanups (tmp_cleanup
);
744 /* Skip spaces, move to possible next arg. */
754 if (selected_frame
== NULL
)
755 error ("No selected frame.");
756 return selected_frame
;
760 struct frame_info
*fid
=
761 find_relative_frame (get_current_frame (), &level
);
762 struct frame_info
*tfid
;
765 /* find_relative_frame was successful */
768 /* If SETUP_ARBITRARY_FRAME is defined, then frame specifications
769 take at least 2 addresses. It is important to detect this case
770 here so that "frame 100" does not give a confusing error message
771 like "frame specification requires two addresses". This of course
772 does not solve the "frame 100" problem for machines on which
773 a frame specification can be made with one address. To solve
774 that, we need a new syntax for a specifying a frame by address.
775 I think the cleanest syntax is $frame(0x45) ($frame(0x23,0x45) for
776 two args, etc.), but people might think that is too much typing,
777 so I guess *0x23,0x45 would be a possible alternative (commas
778 really should be used instead of spaces to delimit; using spaces
779 normally works in an expression). */
780 #ifdef SETUP_ARBITRARY_FRAME
781 error ("No frame %d", args
[0]);
784 /* If (s)he specifies the frame with an address, he deserves what
785 (s)he gets. Still, give the highest one that matches. */
787 for (fid
= get_current_frame ();
788 fid
&& fid
->frame
!= args
[0];
789 fid
= get_prev_frame (fid
))
793 while ((tfid
= get_prev_frame (fid
)) &&
794 (tfid
->frame
== args
[0]))
797 /* We couldn't identify the frame as an existing frame, but
798 perhaps we can create one with a single argument. */
802 #ifdef SETUP_ARBITRARY_FRAME
803 return SETUP_ARBITRARY_FRAME (numargs
, args
);
805 /* Usual case. Do it here rather than have everyone supply
806 a SETUP_ARBITRARY_FRAME that does this. */
808 return create_new_frame (args
[0], 0);
809 error ("Too many args in frame specification");
816 /* FRAME_ARGS_ADDRESS_CORRECT is just like FRAME_ARGS_ADDRESS except
817 that if it is unsure about the answer, it returns 0
818 instead of guessing (this happens on the VAX and i960, for example).
820 On most machines, we never have to guess about the args address,
821 so FRAME_ARGS_ADDRESS{,_CORRECT} are the same. */
822 #if !defined (FRAME_ARGS_ADDRESS_CORRECT)
823 #define FRAME_ARGS_ADDRESS_CORRECT FRAME_ARGS_ADDRESS
826 /* Print verbosely the selected frame or the frame at address ADDR.
827 This means absolutely all information in the frame is printed. */
830 frame_info (char *addr_exp
, int from_tty
)
832 struct frame_info
*fi
;
833 struct symtab_and_line sal
;
836 struct frame_info
*calling_frame_info
;
837 int i
, count
, numregs
;
839 enum language funlang
= language_unknown
;
841 if (!target_has_stack
)
844 fi
= parse_frame_specification (addr_exp
);
846 error ("Invalid frame specified.");
848 sal
= find_pc_line (fi
->pc
,
850 && !fi
->next
->signal_handler_caller
851 && !frame_in_dummy (fi
->next
));
852 func
= get_frame_function (fi
);
853 s
= find_pc_symtab (fi
->pc
);
856 /* I'd like to use SYMBOL_SOURCE_NAME() here, to display
857 * the demangled name that we already have stored in
858 * the symbol table, but we stored a version with
859 * DMGL_PARAMS turned on, and here we don't want
860 * to display parameters. So call the demangler again,
861 * with DMGL_ANSI only. RT
862 * (Yes, I know that printf_symbol_filtered() will
863 * again try to demangle the name on the fly, but
864 * the issue is that if cplus_demangle() fails here,
865 * it'll fail there too. So we want to catch the failure
866 * ("demangled==NULL" case below) here, while we still
867 * have our hands on the function symbol.)
870 funname
= SYMBOL_NAME (func
);
871 funlang
= SYMBOL_LANGUAGE (func
);
872 if (funlang
== language_cplus
)
874 demangled
= cplus_demangle (funname
, DMGL_ANSI
);
875 /* If the demangler fails, try the demangled name
876 * from the symbol table. This'll have parameters,
877 * but that's preferable to diplaying a mangled name.
879 if (demangled
== NULL
)
880 funname
= SYMBOL_SOURCE_NAME (func
);
885 register struct minimal_symbol
*msymbol
= lookup_minimal_symbol_by_pc (fi
->pc
);
888 funname
= SYMBOL_NAME (msymbol
);
889 funlang
= SYMBOL_LANGUAGE (msymbol
);
892 calling_frame_info
= get_prev_frame (fi
);
894 if (!addr_exp
&& selected_frame_level
>= 0)
896 printf_filtered ("Stack level %d, frame at ", selected_frame_level
);
897 print_address_numeric (fi
->frame
, 1, gdb_stdout
);
898 printf_filtered (":\n");
902 printf_filtered ("Stack frame at ");
903 print_address_numeric (fi
->frame
, 1, gdb_stdout
);
904 printf_filtered (":\n");
906 printf_filtered (" %s = ", REGISTER_NAME (PC_REGNUM
));
907 print_address_numeric (fi
->pc
, 1, gdb_stdout
);
912 printf_filtered (" in ");
913 fprintf_symbol_filtered (gdb_stdout
, funname
, funlang
,
914 DMGL_ANSI
| DMGL_PARAMS
);
918 printf_filtered (" (%s:%d)", sal
.symtab
->filename
, sal
.line
);
919 puts_filtered ("; ");
921 printf_filtered ("saved %s ", REGISTER_NAME (PC_REGNUM
));
922 print_address_numeric (FRAME_SAVED_PC (fi
), 1, gdb_stdout
);
923 printf_filtered ("\n");
927 frameless
= FRAMELESS_FUNCTION_INVOCATION (fi
);
929 printf_filtered (" (FRAMELESS),");
932 if (calling_frame_info
)
934 printf_filtered (" called by frame at ");
935 print_address_numeric (calling_frame_info
->frame
, 1, gdb_stdout
);
937 if (fi
->next
&& calling_frame_info
)
942 printf_filtered (" caller of frame at ");
943 print_address_numeric (fi
->next
->frame
, 1, gdb_stdout
);
945 if (fi
->next
|| calling_frame_info
)
946 puts_filtered ("\n");
948 printf_filtered (" source language %s.\n", language_str (s
->language
));
950 #ifdef PRINT_EXTRA_FRAME_INFO
951 PRINT_EXTRA_FRAME_INFO (fi
);
955 /* Address of the argument list for this frame, or 0. */
956 CORE_ADDR arg_list
= FRAME_ARGS_ADDRESS_CORRECT (fi
);
957 /* Number of args for this frame, or -1 if unknown. */
961 printf_filtered (" Arglist at unknown address.\n");
964 printf_filtered (" Arglist at ");
965 print_address_numeric (arg_list
, 1, gdb_stdout
);
966 printf_filtered (",");
968 numargs
= FRAME_NUM_ARGS (fi
);
970 puts_filtered (" args: ");
971 else if (numargs
== 0)
972 puts_filtered (" no args.");
973 else if (numargs
== 1)
974 puts_filtered (" 1 arg: ");
976 printf_filtered (" %d args: ", numargs
);
977 print_frame_args (func
, fi
, numargs
, gdb_stdout
);
978 puts_filtered ("\n");
982 /* Address of the local variables for this frame, or 0. */
983 CORE_ADDR arg_list
= FRAME_LOCALS_ADDRESS (fi
);
986 printf_filtered (" Locals at unknown address,");
989 printf_filtered (" Locals at ");
990 print_address_numeric (arg_list
, 1, gdb_stdout
);
991 printf_filtered (",");
995 FRAME_INIT_SAVED_REGS (fi
);
996 if (fi
->saved_regs
!= NULL
)
998 /* The sp is special; what's returned isn't the save address, but
999 actually the value of the previous frame's sp. */
1000 printf_filtered (" Previous frame's sp is ");
1001 print_address_numeric (fi
->saved_regs
[SP_REGNUM
], 1, gdb_stdout
);
1002 printf_filtered ("\n");
1005 for (i
= 0; i
< numregs
; i
++)
1006 if (fi
->saved_regs
[i
] && i
!= SP_REGNUM
)
1009 puts_filtered (" Saved registers:\n ");
1011 puts_filtered (",");
1013 printf_filtered (" %s at ", REGISTER_NAME (i
));
1014 print_address_numeric (fi
->saved_regs
[i
], 1, gdb_stdout
);
1018 puts_filtered ("\n");
1022 /* We could get some information about saved registers by
1023 calling get_saved_register on each register. Which info goes
1024 with which frame is necessarily lost, however, and I suspect
1025 that the users don't care whether they get the info. */
1026 puts_filtered ("\n");
1031 /* Set a limit on the number of frames printed by default in a
1034 static int backtrace_limit
;
1037 set_backtrace_limit_command (char *count_exp
, int from_tty
)
1039 int count
= parse_and_eval_long (count_exp
);
1042 error ("Negative argument not meaningful as backtrace limit.");
1044 backtrace_limit
= count
;
1048 backtrace_limit_info (char *arg
, int from_tty
)
1051 error ("\"Info backtrace-limit\" takes no arguments.");
1053 printf_unfiltered ("Backtrace limit: %d.\n", backtrace_limit
);
1057 /* Print briefly all stack frames or just the innermost COUNT frames. */
1059 static void backtrace_command_1 (char *count_exp
, int show_locals
,
1062 backtrace_command_1 (char *count_exp
, int show_locals
, int from_tty
)
1064 struct frame_info
*fi
;
1067 register struct frame_info
*trailing
;
1068 register int trailing_level
;
1070 if (!target_has_stack
)
1071 error ("No stack.");
1073 /* The following code must do two things. First, it must
1074 set the variable TRAILING to the frame from which we should start
1075 printing. Second, it must set the variable count to the number
1076 of frames which we should print, or -1 if all of them. */
1077 trailing
= get_current_frame ();
1079 /* The target can be in a state where there is no valid frames
1080 (e.g., just connected). */
1081 if (trailing
== NULL
)
1082 error ("No stack.");
1087 count
= parse_and_eval_long (count_exp
);
1090 struct frame_info
*current
;
1095 while (current
&& count
--)
1098 current
= get_prev_frame (current
);
1101 /* Will stop when CURRENT reaches the top of the stack. TRAILING
1102 will be COUNT below it. */
1106 trailing
= get_prev_frame (trailing
);
1107 current
= get_prev_frame (current
);
1119 struct partial_symtab
*ps
;
1121 /* Read in symbols for all of the frames. Need to do this in
1122 a separate pass so that "Reading in symbols for xxx" messages
1123 don't screw up the appearance of the backtrace. Also
1124 if people have strong opinions against reading symbols for
1125 backtrace this may have to be an option. */
1129 fi
= get_prev_frame (fi
))
1132 ps
= find_pc_psymtab (fi
->pc
);
1134 PSYMTAB_TO_SYMTAB (ps
); /* Force syms to come in */
1138 for (i
= 0, fi
= trailing
;
1140 i
++, fi
= get_prev_frame (fi
))
1144 /* Don't use print_stack_frame; if an error() occurs it probably
1145 means further attempts to backtrace would fail (on the other
1146 hand, perhaps the code does or could be fixed to make sure
1147 the frame->prev field gets set to NULL in that case). */
1148 print_frame_info_base (fi
, trailing_level
+ i
, 0, 1);
1150 print_frame_local_vars (fi
, 1, gdb_stdout
);
1153 /* If we've stopped before the end, mention that. */
1155 printf_filtered ("(More stack frames follow...)\n");
1159 backtrace_command (char *arg
, int from_tty
)
1161 struct cleanup
*old_chain
= (struct cleanup
*) NULL
;
1162 char **argv
= (char **) NULL
;
1163 int argIndicatingFullTrace
= (-1), totArgLen
= 0, argc
= 0;
1166 if (arg
!= (char *) NULL
)
1170 argv
= buildargv (arg
);
1171 old_chain
= make_cleanup_freeargv (argv
);
1173 for (i
= 0; (argv
[i
] != (char *) NULL
); i
++)
1177 for (j
= 0; (j
< strlen (argv
[i
])); j
++)
1178 argv
[i
][j
] = tolower (argv
[i
][j
]);
1180 if (argIndicatingFullTrace
< 0 && subset_compare (argv
[i
], "full"))
1181 argIndicatingFullTrace
= argc
;
1185 totArgLen
+= strlen (argv
[i
]);
1189 if (argIndicatingFullTrace
>= 0)
1193 argPtr
= (char *) xmalloc (totArgLen
+ 1);
1198 memset (argPtr
, 0, totArgLen
+ 1);
1199 for (i
= 0; (i
< (argc
+ 1)); i
++)
1201 if (i
!= argIndicatingFullTrace
)
1203 strcat (argPtr
, argv
[i
]);
1204 strcat (argPtr
, " ");
1210 argPtr
= (char *) NULL
;
1214 backtrace_command_1 (argPtr
, (argIndicatingFullTrace
>= 0), from_tty
);
1216 if (argIndicatingFullTrace
>= 0 && totArgLen
> 0)
1220 do_cleanups (old_chain
);
1223 static void backtrace_full_command (char *arg
, int from_tty
);
1225 backtrace_full_command (char *arg
, int from_tty
)
1227 backtrace_command_1 (arg
, 1, from_tty
);
1231 /* Print the local variables of a block B active in FRAME.
1232 Return 1 if any variables were printed; 0 otherwise. */
1235 print_block_frame_locals (struct block
*b
, register struct frame_info
*fi
,
1236 int num_tabs
, register struct ui_file
*stream
)
1240 register struct symbol
*sym
;
1241 register int values_printed
= 0;
1243 nsyms
= BLOCK_NSYMS (b
);
1245 for (i
= 0; i
< nsyms
; i
++)
1247 sym
= BLOCK_SYM (b
, i
);
1248 switch (SYMBOL_CLASS (sym
))
1255 for (j
= 0; j
< num_tabs
; j
++)
1256 fputs_filtered ("\t", stream
);
1257 fputs_filtered (SYMBOL_SOURCE_NAME (sym
), stream
);
1258 fputs_filtered (" = ", stream
);
1259 print_variable_value (sym
, fi
, stream
);
1260 fprintf_filtered (stream
, "\n");
1264 /* Ignore symbols which are not locals. */
1268 return values_printed
;
1271 /* Same, but print labels. */
1274 print_block_frame_labels (struct block
*b
, int *have_default
,
1275 register struct ui_file
*stream
)
1279 register struct symbol
*sym
;
1280 register int values_printed
= 0;
1282 nsyms
= BLOCK_NSYMS (b
);
1284 for (i
= 0; i
< nsyms
; i
++)
1286 sym
= BLOCK_SYM (b
, i
);
1287 if (STREQ (SYMBOL_NAME (sym
), "default"))
1293 if (SYMBOL_CLASS (sym
) == LOC_LABEL
)
1295 struct symtab_and_line sal
;
1296 sal
= find_pc_line (SYMBOL_VALUE_ADDRESS (sym
), 0);
1298 fputs_filtered (SYMBOL_SOURCE_NAME (sym
), stream
);
1301 fprintf_filtered (stream
, " ");
1302 print_address_numeric (SYMBOL_VALUE_ADDRESS (sym
), 1, stream
);
1304 fprintf_filtered (stream
, " in file %s, line %d\n",
1305 sal
.symtab
->filename
, sal
.line
);
1308 return values_printed
;
1311 /* Print on STREAM all the local variables in frame FRAME,
1312 including all the blocks active in that frame
1315 Returns 1 if the job was done,
1316 or 0 if nothing was printed because we have no info
1317 on the function running in FRAME. */
1320 print_frame_local_vars (register struct frame_info
*fi
, register int num_tabs
,
1321 register struct ui_file
*stream
)
1323 register struct block
*block
= get_frame_block (fi
);
1324 register int values_printed
= 0;
1328 fprintf_filtered (stream
, "No symbol table info available.\n");
1334 if (print_block_frame_locals (block
, fi
, num_tabs
, stream
))
1336 /* After handling the function's top-level block, stop.
1337 Don't continue to its superblock, the block of
1338 per-file symbols. */
1339 if (BLOCK_FUNCTION (block
))
1341 block
= BLOCK_SUPERBLOCK (block
);
1344 if (!values_printed
)
1346 fprintf_filtered (stream
, "No locals.\n");
1350 /* Same, but print labels. */
1353 print_frame_label_vars (register struct frame_info
*fi
, int this_level_only
,
1354 register struct ui_file
*stream
)
1356 register struct blockvector
*bl
;
1357 register struct block
*block
= get_frame_block (fi
);
1358 register int values_printed
= 0;
1359 int index
, have_default
= 0;
1360 char *blocks_printed
;
1361 CORE_ADDR pc
= fi
->pc
;
1365 fprintf_filtered (stream
, "No symbol table info available.\n");
1369 bl
= blockvector_for_pc (BLOCK_END (block
) - 4, &index
);
1370 blocks_printed
= (char *) alloca (BLOCKVECTOR_NBLOCKS (bl
) * sizeof (char));
1371 memset (blocks_printed
, 0, BLOCKVECTOR_NBLOCKS (bl
) * sizeof (char));
1375 CORE_ADDR end
= BLOCK_END (block
) - 4;
1378 if (bl
!= blockvector_for_pc (end
, &index
))
1379 error ("blockvector blotch");
1380 if (BLOCKVECTOR_BLOCK (bl
, index
) != block
)
1381 error ("blockvector botch");
1382 last_index
= BLOCKVECTOR_NBLOCKS (bl
);
1385 /* Don't print out blocks that have gone by. */
1386 while (index
< last_index
1387 && BLOCK_END (BLOCKVECTOR_BLOCK (bl
, index
)) < pc
)
1390 while (index
< last_index
1391 && BLOCK_END (BLOCKVECTOR_BLOCK (bl
, index
)) < end
)
1393 if (blocks_printed
[index
] == 0)
1395 if (print_block_frame_labels (BLOCKVECTOR_BLOCK (bl
, index
), &have_default
, stream
))
1397 blocks_printed
[index
] = 1;
1403 if (values_printed
&& this_level_only
)
1406 /* After handling the function's top-level block, stop.
1407 Don't continue to its superblock, the block of
1408 per-file symbols. */
1409 if (BLOCK_FUNCTION (block
))
1411 block
= BLOCK_SUPERBLOCK (block
);
1414 if (!values_printed
&& !this_level_only
)
1416 fprintf_filtered (stream
, "No catches.\n");
1422 locals_info (char *args
, int from_tty
)
1424 if (!selected_frame
)
1425 error ("No frame selected.");
1426 print_frame_local_vars (selected_frame
, 0, gdb_stdout
);
1430 catch_info (char *ignore
, int from_tty
)
1432 struct symtab_and_line
*sal
;
1434 /* Check for target support for exception handling */
1435 sal
= target_enable_exception_callback (EX_EVENT_CATCH
, 1);
1438 /* Currently not handling this */
1439 /* Ideally, here we should interact with the C++ runtime
1440 system to find the list of active handlers, etc. */
1441 fprintf_filtered (gdb_stdout
, "Info catch not supported with this target/compiler combination.\n");
1443 if (!selected_frame
)
1444 error ("No frame selected.");
1449 /* Assume g++ compiled code -- old v 4.16 behaviour */
1450 if (!selected_frame
)
1451 error ("No frame selected.");
1453 print_frame_label_vars (selected_frame
, 0, gdb_stdout
);
1458 print_frame_arg_vars (register struct frame_info
*fi
,
1459 register struct ui_file
*stream
)
1461 struct symbol
*func
= get_frame_function (fi
);
1462 register struct block
*b
;
1465 register struct symbol
*sym
, *sym2
;
1466 register int values_printed
= 0;
1470 fprintf_filtered (stream
, "No symbol table info available.\n");
1474 b
= SYMBOL_BLOCK_VALUE (func
);
1475 nsyms
= BLOCK_NSYMS (b
);
1477 for (i
= 0; i
< nsyms
; i
++)
1479 sym
= BLOCK_SYM (b
, i
);
1480 switch (SYMBOL_CLASS (sym
))
1486 case LOC_REGPARM_ADDR
:
1487 case LOC_BASEREG_ARG
:
1489 fputs_filtered (SYMBOL_SOURCE_NAME (sym
), stream
);
1490 fputs_filtered (" = ", stream
);
1492 /* We have to look up the symbol because arguments can have
1493 two entries (one a parameter, one a local) and the one we
1494 want is the local, which lookup_symbol will find for us.
1495 This includes gcc1 (not gcc2) on the sparc when passing a
1496 small structure and gcc2 when the argument type is float
1497 and it is passed as a double and converted to float by
1498 the prologue (in the latter case the type of the LOC_ARG
1499 symbol is double and the type of the LOC_LOCAL symbol is
1500 float). There are also LOC_ARG/LOC_REGISTER pairs which
1501 are not combined in symbol-reading. */
1503 sym2
= lookup_symbol (SYMBOL_NAME (sym
),
1504 b
, VAR_NAMESPACE
, (int *) NULL
, (struct symtab
**) NULL
);
1505 print_variable_value (sym2
, fi
, stream
);
1506 fprintf_filtered (stream
, "\n");
1510 /* Don't worry about things which aren't arguments. */
1515 if (!values_printed
)
1517 fprintf_filtered (stream
, "No arguments.\n");
1522 args_info (char *ignore
, int from_tty
)
1524 if (!selected_frame
)
1525 error ("No frame selected.");
1526 print_frame_arg_vars (selected_frame
, gdb_stdout
);
1531 args_plus_locals_info (char *ignore
, int from_tty
)
1533 args_info (ignore
, from_tty
);
1534 locals_info (ignore
, from_tty
);
1538 /* Select frame FI, and note that its stack level is LEVEL.
1539 LEVEL may be -1 if an actual level number is not known. */
1542 select_frame (struct frame_info
*fi
, int level
)
1544 register struct symtab
*s
;
1546 selected_frame
= fi
;
1547 selected_frame_level
= level
;
1548 if (selected_frame_level_changed_hook
)
1549 selected_frame_level_changed_hook (level
);
1551 /* Ensure that symbols for this frame are read in. Also, determine the
1552 source language of this frame, and switch to it if desired. */
1555 s
= find_pc_symtab (fi
->pc
);
1557 && s
->language
!= current_language
->la_language
1558 && s
->language
!= language_unknown
1559 && language_mode
== language_mode_auto
)
1561 set_language (s
->language
);
1563 /* elz: this if here fixes the problem with the pc not being displayed
1564 in the tui asm layout, with no debug symbols. The value of s
1565 would be 0 here, and select_source_symtab would abort the
1566 command by calling the 'error' function */
1569 TUIDO (((TuiOpaqueFuncPtr
) tui_vSelectSourceSymtab
, s
));
1575 /* Select frame FI, noting that its stack level is LEVEL. Also print
1576 the stack frame and show the source if this is the tui version. */
1578 select_and_print_frame (struct frame_info
*fi
, int level
)
1580 select_frame (fi
, level
);
1583 print_stack_frame (fi
, level
, 1);
1584 TUIDO (((TuiOpaqueFuncPtr
) tui_vCheckDataValues
, fi
));
1589 /* Select frame FI, noting that its stack level is LEVEL. Be silent if
1593 select_and_maybe_print_frame (struct frame_info
*fi
, int level
)
1596 select_frame (fi
, level
);
1598 select_and_print_frame (fi
, level
);
1603 /* Store the selected frame and its level into *FRAMEP and *LEVELP.
1604 If there is no selected frame, *FRAMEP is set to NULL. */
1607 record_selected_frame (CORE_ADDR
*frameaddrp
, int *levelp
)
1609 *frameaddrp
= selected_frame
? selected_frame
->frame
: 0;
1610 *levelp
= selected_frame_level
;
1613 /* Return the symbol-block in which the selected frame is executing.
1614 Can return zero under various legitimate circumstances. */
1617 get_selected_block (void)
1619 if (!target_has_stack
)
1622 if (!selected_frame
)
1623 return get_current_block ();
1624 return get_frame_block (selected_frame
);
1627 /* Find a frame a certain number of levels away from FRAME.
1628 LEVEL_OFFSET_PTR points to an int containing the number of levels.
1629 Positive means go to earlier frames (up); negative, the reverse.
1630 The int that contains the number of levels is counted toward
1631 zero as the frames for those levels are found.
1632 If the top or bottom frame is reached, that frame is returned,
1633 but the final value of *LEVEL_OFFSET_PTR is nonzero and indicates
1634 how much farther the original request asked to go. */
1637 find_relative_frame (register struct frame_info
*frame
,
1638 register int *level_offset_ptr
)
1640 register struct frame_info
*prev
;
1641 register struct frame_info
*frame1
;
1643 /* Going up is simple: just do get_prev_frame enough times
1644 or until initial frame is reached. */
1645 while (*level_offset_ptr
> 0)
1647 prev
= get_prev_frame (frame
);
1650 (*level_offset_ptr
)--;
1653 /* Going down is just as simple. */
1654 if (*level_offset_ptr
< 0)
1656 while (*level_offset_ptr
< 0)
1658 frame1
= get_next_frame (frame
);
1662 (*level_offset_ptr
)++;
1668 /* The "select_frame" command. With no arg, NOP.
1669 With arg LEVEL_EXP, select the frame at level LEVEL if it is a
1670 valid level. Otherwise, treat level_exp as an address expression
1671 and select it. See parse_frame_specification for more info on proper
1672 frame expressions. */
1677 select_frame_command_wrapper (char *level_exp
, int from_tty
)
1679 select_frame_command (level_exp
, from_tty
);
1683 select_frame_command (char *level_exp
, int from_tty
)
1685 register struct frame_info
*frame
, *frame1
;
1686 unsigned int level
= 0;
1688 if (!target_has_stack
)
1689 error ("No stack.");
1691 frame
= parse_frame_specification (level_exp
);
1693 /* Try to figure out what level this frame is. But if there is
1694 no current stack, don't error out -- let the user set one. */
1696 if (get_current_frame ())
1698 for (frame1
= get_prev_frame (0);
1699 frame1
&& frame1
!= frame
;
1700 frame1
= get_prev_frame (frame1
))
1707 select_frame (frame
, level
);
1710 /* The "frame" command. With no arg, print selected frame briefly.
1711 With arg, behaves like select_frame and then prints the selected
1715 frame_command (char *level_exp
, int from_tty
)
1717 select_frame_command (level_exp
, from_tty
);
1718 show_and_print_stack_frame (selected_frame
, selected_frame_level
, 1);
1721 /* The XDB Compatibility command to print the current frame. */
1724 current_frame_command (char *level_exp
, int from_tty
)
1726 if (target_has_stack
== 0 || selected_frame
== 0)
1727 error ("No stack.");
1728 print_only_stack_frame (selected_frame
, selected_frame_level
, 1);
1731 /* Select the frame up one or COUNT stack levels
1732 from the previously selected frame, and print it briefly. */
1736 up_silently_base (char *count_exp
)
1738 register struct frame_info
*fi
;
1739 int count
= 1, count1
;
1741 count
= parse_and_eval_long (count_exp
);
1744 if (target_has_stack
== 0 || selected_frame
== 0)
1745 error ("No stack.");
1747 fi
= find_relative_frame (selected_frame
, &count1
);
1748 if (count1
!= 0 && count_exp
== 0)
1749 error ("Initial frame selected; you cannot go up.");
1750 select_frame (fi
, selected_frame_level
+ count
- count1
);
1754 up_silently_command (char *count_exp
, int from_tty
)
1756 up_silently_base (count_exp
);
1758 print_stack_frame (selected_frame
, selected_frame_level
, 1);
1762 up_command (char *count_exp
, int from_tty
)
1764 up_silently_base (count_exp
);
1765 show_and_print_stack_frame (selected_frame
, selected_frame_level
, 1);
1768 /* Select the frame down one or COUNT stack levels
1769 from the previously selected frame, and print it briefly. */
1773 down_silently_base (char *count_exp
)
1775 register struct frame_info
*frame
;
1776 int count
= -1, count1
;
1778 count
= -parse_and_eval_long (count_exp
);
1781 if (target_has_stack
== 0 || selected_frame
== 0)
1782 error ("No stack.");
1784 frame
= find_relative_frame (selected_frame
, &count1
);
1785 if (count1
!= 0 && count_exp
== 0)
1788 /* We only do this if count_exp is not specified. That way "down"
1789 means to really go down (and let me know if that is
1790 impossible), but "down 9999" can be used to mean go all the way
1791 down without getting an error. */
1793 error ("Bottom (i.e., innermost) frame selected; you cannot go down.");
1796 select_frame (frame
, selected_frame_level
+ count
- count1
);
1801 down_silently_command (char *count_exp
, int from_tty
)
1803 down_silently_base (count_exp
);
1805 print_stack_frame (selected_frame
, selected_frame_level
, 1);
1809 down_command (char *count_exp
, int from_tty
)
1811 down_silently_base (count_exp
);
1812 show_and_print_stack_frame (selected_frame
, selected_frame_level
, 1);
1817 return_command_wrapper (char *retval_exp
, int from_tty
)
1819 return_command (retval_exp
, from_tty
);
1823 return_command (char *retval_exp
, int from_tty
)
1825 struct symbol
*thisfun
;
1826 CORE_ADDR selected_frame_addr
;
1827 CORE_ADDR selected_frame_pc
;
1828 struct frame_info
*frame
;
1829 value_ptr return_value
= NULL
;
1831 if (selected_frame
== NULL
)
1832 error ("No selected frame.");
1833 thisfun
= get_frame_function (selected_frame
);
1834 selected_frame_addr
= FRAME_FP (selected_frame
);
1835 selected_frame_pc
= selected_frame
->pc
;
1837 /* Compute the return value (if any -- possibly getting errors here). */
1841 struct type
*return_type
= NULL
;
1843 return_value
= parse_and_eval (retval_exp
);
1845 /* Cast return value to the return type of the function. */
1846 if (thisfun
!= NULL
)
1847 return_type
= TYPE_TARGET_TYPE (SYMBOL_TYPE (thisfun
));
1848 if (return_type
== NULL
)
1849 return_type
= builtin_type_int
;
1850 return_value
= value_cast (return_type
, return_value
);
1852 /* Make sure we have fully evaluated it, since
1853 it might live in the stack frame we're about to pop. */
1854 if (VALUE_LAZY (return_value
))
1855 value_fetch_lazy (return_value
);
1858 /* If interactive, require confirmation. */
1864 if (!query ("Make %s return now? ", SYMBOL_SOURCE_NAME (thisfun
)))
1866 error ("Not confirmed.");
1870 else if (!query ("Make selected stack frame return now? "))
1871 error ("Not confirmed.");
1874 /* Do the real work. Pop until the specified frame is current. We
1875 use this method because the selected_frame is not valid after
1876 a POP_FRAME. The pc comparison makes this work even if the
1877 selected frame shares its fp with another frame. */
1879 while (selected_frame_addr
!= (frame
= get_current_frame ())->frame
1880 || selected_frame_pc
!= frame
->pc
)
1883 /* Then pop that frame. */
1887 /* Compute the return value (if any) and store in the place
1888 for return values. */
1891 set_return_value (return_value
);
1893 /* If we are at the end of a call dummy now, pop the dummy frame too. */
1895 if (CALL_DUMMY_HAS_COMPLETED (read_pc(), read_sp (),
1896 FRAME_FP (get_current_frame ())))
1899 /* If interactive, print the frame that is now current. */
1902 frame_command ("0", 1);
1904 select_frame_command ("0", 0);
1907 /* Sets the scope to input function name, provided that the
1908 function is within the current stack frame */
1910 struct function_bounds
1912 CORE_ADDR low
, high
;
1915 static void func_command (char *arg
, int from_tty
);
1917 func_command (char *arg
, int from_tty
)
1919 struct frame_info
*fp
;
1921 struct symtabs_and_lines sals
;
1924 struct function_bounds
*func_bounds
= (struct function_bounds
*) NULL
;
1926 if (arg
!= (char *) NULL
)
1929 fp
= parse_frame_specification ("0");
1930 sals
= decode_line_spec (arg
, 1);
1931 func_bounds
= (struct function_bounds
*) xmalloc (
1932 sizeof (struct function_bounds
) * sals
.nelts
);
1933 for (i
= 0; (i
< sals
.nelts
&& !found
); i
++)
1935 if (sals
.sals
[i
].pc
== (CORE_ADDR
) 0 ||
1936 find_pc_partial_function (sals
.sals
[i
].pc
,
1938 &func_bounds
[i
].low
,
1939 &func_bounds
[i
].high
) == 0)
1941 func_bounds
[i
].low
=
1942 func_bounds
[i
].high
= (CORE_ADDR
) NULL
;
1948 for (i
= 0; (i
< sals
.nelts
&& !found
); i
++)
1949 found
= (fp
->pc
>= func_bounds
[i
].low
&&
1950 fp
->pc
< func_bounds
[i
].high
);
1954 fp
= find_relative_frame (fp
, &level
);
1957 while (!found
&& level
== 0);
1960 xfree (func_bounds
);
1963 printf_filtered ("'%s' not within current stack frame.\n", arg
);
1964 else if (fp
!= selected_frame
)
1965 select_and_print_frame (fp
, level
);
1968 /* Gets the language of the current frame. */
1971 get_frame_language (void)
1973 register struct symtab
*s
;
1974 enum language flang
; /* The language of the current frame */
1978 s
= find_pc_symtab (selected_frame
->pc
);
1980 flang
= s
->language
;
1982 flang
= language_unknown
;
1985 flang
= language_unknown
;
1991 _initialize_stack (void)
1994 backtrace_limit
= 30;
1997 add_com ("return", class_stack
, return_command
,
1998 "Make selected stack frame return to its caller.\n\
1999 Control remains in the debugger, but when you continue\n\
2000 execution will resume in the frame above the one now selected.\n\
2001 If an argument is given, it is an expression for the value to return.");
2003 add_com ("up", class_stack
, up_command
,
2004 "Select and print stack frame that called this one.\n\
2005 An argument says how many frames up to go.");
2006 add_com ("up-silently", class_support
, up_silently_command
,
2007 "Same as the `up' command, but does not print anything.\n\
2008 This is useful in command scripts.");
2010 add_com ("down", class_stack
, down_command
,
2011 "Select and print stack frame called by this one.\n\
2012 An argument says how many frames down to go.");
2013 add_com_alias ("do", "down", class_stack
, 1);
2014 add_com_alias ("dow", "down", class_stack
, 1);
2015 add_com ("down-silently", class_support
, down_silently_command
,
2016 "Same as the `down' command, but does not print anything.\n\
2017 This is useful in command scripts.");
2019 add_com ("frame", class_stack
, frame_command
,
2020 "Select and print a stack frame.\n\
2021 With no argument, print the selected stack frame. (See also \"info frame\").\n\
2022 An argument specifies the frame to select.\n\
2023 It can be a stack frame number or the address of the frame.\n\
2024 With argument, nothing is printed if input is coming from\n\
2025 a command file or a user-defined command.");
2027 add_com_alias ("f", "frame", class_stack
, 1);
2031 add_com ("L", class_stack
, current_frame_command
,
2032 "Print the current stack frame.\n");
2033 add_com_alias ("V", "frame", class_stack
, 1);
2035 add_com ("select-frame", class_stack
, select_frame_command
,
2036 "Select a stack frame without printing anything.\n\
2037 An argument specifies the frame to select.\n\
2038 It can be a stack frame number or the address of the frame.\n");
2040 add_com ("backtrace", class_stack
, backtrace_command
,
2041 "Print backtrace of all stack frames, or innermost COUNT frames.\n\
2042 With a negative argument, print outermost -COUNT frames.\n\
2043 Use of the 'full' qualifier also prints the values of the local variables.\n");
2044 add_com_alias ("bt", "backtrace", class_stack
, 0);
2047 add_com_alias ("t", "backtrace", class_stack
, 0);
2048 add_com ("T", class_stack
, backtrace_full_command
,
2049 "Print backtrace of all stack frames, or innermost COUNT frames \n\
2050 and the values of the local variables.\n\
2051 With a negative argument, print outermost -COUNT frames.\n\
2052 Usage: T <count>\n");
2055 add_com_alias ("where", "backtrace", class_alias
, 0);
2056 add_info ("stack", backtrace_command
,
2057 "Backtrace of the stack, or innermost COUNT frames.");
2058 add_info_alias ("s", "stack", 1);
2059 add_info ("frame", frame_info
,
2060 "All about selected stack frame, or frame at ADDR.");
2061 add_info_alias ("f", "frame", 1);
2062 add_info ("locals", locals_info
,
2063 "Local variables of current stack frame.");
2064 add_info ("args", args_info
,
2065 "Argument variables of current stack frame.");
2067 add_com ("l", class_info
, args_plus_locals_info
,
2068 "Argument and local variables of current stack frame.");
2071 add_com ("func", class_stack
, func_command
,
2072 "Select the stack frame that contains <func>.\nUsage: func <name>\n");
2074 add_info ("catch", catch_info
,
2075 "Exceptions that can be caught in the current stack frame.");
2078 add_cmd ("backtrace-limit", class_stack
, set_backtrace_limit_command
,
2079 "Specify maximum number of frames for \"backtrace\" to print by default.",
2081 add_info ("backtrace-limit", backtrace_limit_info
,
2082 "The maximum number of frames for \"backtrace\" to print by default.");