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 vp
= parse_and_eval (addr_string
);
733 level
= value_as_long (vp
);
735 args
[numargs
++] = value_as_pointer (vp
);
736 do_cleanups (tmp_cleanup
);
739 /* Skip spaces, move to possible next arg. */
749 if (selected_frame
== NULL
)
750 error ("No selected frame.");
751 return selected_frame
;
755 struct frame_info
*fid
=
756 find_relative_frame (get_current_frame (), &level
);
757 struct frame_info
*tfid
;
760 /* find_relative_frame was successful */
763 /* If SETUP_ARBITRARY_FRAME is defined, then frame specifications
764 take at least 2 addresses. It is important to detect this case
765 here so that "frame 100" does not give a confusing error message
766 like "frame specification requires two addresses". This of course
767 does not solve the "frame 100" problem for machines on which
768 a frame specification can be made with one address. To solve
769 that, we need a new syntax for a specifying a frame by address.
770 I think the cleanest syntax is $frame(0x45) ($frame(0x23,0x45) for
771 two args, etc.), but people might think that is too much typing,
772 so I guess *0x23,0x45 would be a possible alternative (commas
773 really should be used instead of spaces to delimit; using spaces
774 normally works in an expression). */
775 #ifdef SETUP_ARBITRARY_FRAME
776 error ("No frame %d", args
[0]);
779 /* If (s)he specifies the frame with an address, he deserves what
780 (s)he gets. Still, give the highest one that matches. */
782 for (fid
= get_current_frame ();
783 fid
&& fid
->frame
!= args
[0];
784 fid
= get_prev_frame (fid
))
788 while ((tfid
= get_prev_frame (fid
)) &&
789 (tfid
->frame
== args
[0]))
792 /* We couldn't identify the frame as an existing frame, but
793 perhaps we can create one with a single argument. */
797 #ifdef SETUP_ARBITRARY_FRAME
798 return SETUP_ARBITRARY_FRAME (numargs
, args
);
800 /* Usual case. Do it here rather than have everyone supply
801 a SETUP_ARBITRARY_FRAME that does this. */
803 return create_new_frame (args
[0], 0);
804 error ("Too many args in frame specification");
811 /* FRAME_ARGS_ADDRESS_CORRECT is just like FRAME_ARGS_ADDRESS except
812 that if it is unsure about the answer, it returns 0
813 instead of guessing (this happens on the VAX and i960, for example).
815 On most machines, we never have to guess about the args address,
816 so FRAME_ARGS_ADDRESS{,_CORRECT} are the same. */
817 #if !defined (FRAME_ARGS_ADDRESS_CORRECT)
818 #define FRAME_ARGS_ADDRESS_CORRECT FRAME_ARGS_ADDRESS
821 /* Print verbosely the selected frame or the frame at address ADDR.
822 This means absolutely all information in the frame is printed. */
825 frame_info (char *addr_exp
, int from_tty
)
827 struct frame_info
*fi
;
828 struct symtab_and_line sal
;
831 struct frame_info
*calling_frame_info
;
832 int i
, count
, numregs
;
834 enum language funlang
= language_unknown
;
836 if (!target_has_stack
)
839 fi
= parse_frame_specification (addr_exp
);
841 error ("Invalid frame specified.");
843 sal
= find_pc_line (fi
->pc
,
845 && !fi
->next
->signal_handler_caller
846 && !frame_in_dummy (fi
->next
));
847 func
= get_frame_function (fi
);
848 s
= find_pc_symtab (fi
->pc
);
851 /* I'd like to use SYMBOL_SOURCE_NAME() here, to display
852 * the demangled name that we already have stored in
853 * the symbol table, but we stored a version with
854 * DMGL_PARAMS turned on, and here we don't want
855 * to display parameters. So call the demangler again,
856 * with DMGL_ANSI only. RT
857 * (Yes, I know that printf_symbol_filtered() will
858 * again try to demangle the name on the fly, but
859 * the issue is that if cplus_demangle() fails here,
860 * it'll fail there too. So we want to catch the failure
861 * ("demangled==NULL" case below) here, while we still
862 * have our hands on the function symbol.)
865 funname
= SYMBOL_NAME (func
);
866 funlang
= SYMBOL_LANGUAGE (func
);
867 if (funlang
== language_cplus
)
869 demangled
= cplus_demangle (funname
, DMGL_ANSI
);
870 /* If the demangler fails, try the demangled name
871 * from the symbol table. This'll have parameters,
872 * but that's preferable to diplaying a mangled name.
874 if (demangled
== NULL
)
875 funname
= SYMBOL_SOURCE_NAME (func
);
880 register struct minimal_symbol
*msymbol
= lookup_minimal_symbol_by_pc (fi
->pc
);
883 funname
= SYMBOL_NAME (msymbol
);
884 funlang
= SYMBOL_LANGUAGE (msymbol
);
887 calling_frame_info
= get_prev_frame (fi
);
889 if (!addr_exp
&& selected_frame_level
>= 0)
891 printf_filtered ("Stack level %d, frame at ", selected_frame_level
);
892 print_address_numeric (fi
->frame
, 1, gdb_stdout
);
893 printf_filtered (":\n");
897 printf_filtered ("Stack frame at ");
898 print_address_numeric (fi
->frame
, 1, gdb_stdout
);
899 printf_filtered (":\n");
901 printf_filtered (" %s = ", REGISTER_NAME (PC_REGNUM
));
902 print_address_numeric (fi
->pc
, 1, gdb_stdout
);
907 printf_filtered (" in ");
908 fprintf_symbol_filtered (gdb_stdout
, funname
, funlang
,
909 DMGL_ANSI
| DMGL_PARAMS
);
913 printf_filtered (" (%s:%d)", sal
.symtab
->filename
, sal
.line
);
914 puts_filtered ("; ");
916 printf_filtered ("saved %s ", REGISTER_NAME (PC_REGNUM
));
917 print_address_numeric (FRAME_SAVED_PC (fi
), 1, gdb_stdout
);
918 printf_filtered ("\n");
922 frameless
= FRAMELESS_FUNCTION_INVOCATION (fi
);
924 printf_filtered (" (FRAMELESS),");
927 if (calling_frame_info
)
929 printf_filtered (" called by frame at ");
930 print_address_numeric (calling_frame_info
->frame
, 1, gdb_stdout
);
932 if (fi
->next
&& calling_frame_info
)
937 printf_filtered (" caller of frame at ");
938 print_address_numeric (fi
->next
->frame
, 1, gdb_stdout
);
940 if (fi
->next
|| calling_frame_info
)
941 puts_filtered ("\n");
943 printf_filtered (" source language %s.\n", language_str (s
->language
));
945 #ifdef PRINT_EXTRA_FRAME_INFO
946 PRINT_EXTRA_FRAME_INFO (fi
);
950 /* Address of the argument list for this frame, or 0. */
951 CORE_ADDR arg_list
= FRAME_ARGS_ADDRESS_CORRECT (fi
);
952 /* Number of args for this frame, or -1 if unknown. */
956 printf_filtered (" Arglist at unknown address.\n");
959 printf_filtered (" Arglist at ");
960 print_address_numeric (arg_list
, 1, gdb_stdout
);
961 printf_filtered (",");
963 numargs
= FRAME_NUM_ARGS (fi
);
965 puts_filtered (" args: ");
966 else if (numargs
== 0)
967 puts_filtered (" no args.");
968 else if (numargs
== 1)
969 puts_filtered (" 1 arg: ");
971 printf_filtered (" %d args: ", numargs
);
972 print_frame_args (func
, fi
, numargs
, gdb_stdout
);
973 puts_filtered ("\n");
977 /* Address of the local variables for this frame, or 0. */
978 CORE_ADDR arg_list
= FRAME_LOCALS_ADDRESS (fi
);
981 printf_filtered (" Locals at unknown address,");
984 printf_filtered (" Locals at ");
985 print_address_numeric (arg_list
, 1, gdb_stdout
);
986 printf_filtered (",");
990 FRAME_INIT_SAVED_REGS (fi
);
991 if (fi
->saved_regs
!= NULL
)
993 /* The sp is special; what's returned isn't the save address, but
994 actually the value of the previous frame's sp. */
995 printf_filtered (" Previous frame's sp is ");
996 print_address_numeric (fi
->saved_regs
[SP_REGNUM
], 1, gdb_stdout
);
997 printf_filtered ("\n");
999 numregs
= ARCH_NUM_REGS
;
1000 for (i
= 0; i
< numregs
; i
++)
1001 if (fi
->saved_regs
[i
] && i
!= SP_REGNUM
)
1004 puts_filtered (" Saved registers:\n ");
1006 puts_filtered (",");
1008 printf_filtered (" %s at ", REGISTER_NAME (i
));
1009 print_address_numeric (fi
->saved_regs
[i
], 1, gdb_stdout
);
1013 puts_filtered ("\n");
1017 /* We could get some information about saved registers by
1018 calling get_saved_register on each register. Which info goes
1019 with which frame is necessarily lost, however, and I suspect
1020 that the users don't care whether they get the info. */
1021 puts_filtered ("\n");
1026 /* Set a limit on the number of frames printed by default in a
1029 static int backtrace_limit
;
1032 set_backtrace_limit_command (char *count_exp
, int from_tty
)
1034 int count
= parse_and_eval_long (count_exp
);
1037 error ("Negative argument not meaningful as backtrace limit.");
1039 backtrace_limit
= count
;
1043 backtrace_limit_info (char *arg
, int from_tty
)
1046 error ("\"Info backtrace-limit\" takes no arguments.");
1048 printf_unfiltered ("Backtrace limit: %d.\n", backtrace_limit
);
1052 /* Print briefly all stack frames or just the innermost COUNT frames. */
1054 static void backtrace_command_1 (char *count_exp
, int show_locals
,
1057 backtrace_command_1 (char *count_exp
, int show_locals
, int from_tty
)
1059 struct frame_info
*fi
;
1062 register struct frame_info
*trailing
;
1063 register int trailing_level
;
1065 if (!target_has_stack
)
1066 error ("No stack.");
1068 /* The following code must do two things. First, it must
1069 set the variable TRAILING to the frame from which we should start
1070 printing. Second, it must set the variable count to the number
1071 of frames which we should print, or -1 if all of them. */
1072 trailing
= get_current_frame ();
1074 /* The target can be in a state where there is no valid frames
1075 (e.g., just connected). */
1076 if (trailing
== NULL
)
1077 error ("No stack.");
1082 count
= parse_and_eval_long (count_exp
);
1085 struct frame_info
*current
;
1090 while (current
&& count
--)
1093 current
= get_prev_frame (current
);
1096 /* Will stop when CURRENT reaches the top of the stack. TRAILING
1097 will be COUNT below it. */
1101 trailing
= get_prev_frame (trailing
);
1102 current
= get_prev_frame (current
);
1114 struct partial_symtab
*ps
;
1116 /* Read in symbols for all of the frames. Need to do this in
1117 a separate pass so that "Reading in symbols for xxx" messages
1118 don't screw up the appearance of the backtrace. Also
1119 if people have strong opinions against reading symbols for
1120 backtrace this may have to be an option. */
1124 fi
= get_prev_frame (fi
))
1127 ps
= find_pc_psymtab (fi
->pc
);
1129 PSYMTAB_TO_SYMTAB (ps
); /* Force syms to come in */
1133 for (i
= 0, fi
= trailing
;
1135 i
++, fi
= get_prev_frame (fi
))
1139 /* Don't use print_stack_frame; if an error() occurs it probably
1140 means further attempts to backtrace would fail (on the other
1141 hand, perhaps the code does or could be fixed to make sure
1142 the frame->prev field gets set to NULL in that case). */
1143 print_frame_info_base (fi
, trailing_level
+ i
, 0, 1);
1145 print_frame_local_vars (fi
, 1, gdb_stdout
);
1148 /* If we've stopped before the end, mention that. */
1150 printf_filtered ("(More stack frames follow...)\n");
1154 backtrace_command (char *arg
, int from_tty
)
1156 struct cleanup
*old_chain
= (struct cleanup
*) NULL
;
1157 char **argv
= (char **) NULL
;
1158 int argIndicatingFullTrace
= (-1), totArgLen
= 0, argc
= 0;
1161 if (arg
!= (char *) NULL
)
1165 argv
= buildargv (arg
);
1166 old_chain
= make_cleanup_freeargv (argv
);
1168 for (i
= 0; (argv
[i
] != (char *) NULL
); i
++)
1172 for (j
= 0; (j
< strlen (argv
[i
])); j
++)
1173 argv
[i
][j
] = tolower (argv
[i
][j
]);
1175 if (argIndicatingFullTrace
< 0 && subset_compare (argv
[i
], "full"))
1176 argIndicatingFullTrace
= argc
;
1180 totArgLen
+= strlen (argv
[i
]);
1184 if (argIndicatingFullTrace
>= 0)
1188 argPtr
= (char *) xmalloc (totArgLen
+ 1);
1193 memset (argPtr
, 0, totArgLen
+ 1);
1194 for (i
= 0; (i
< (argc
+ 1)); i
++)
1196 if (i
!= argIndicatingFullTrace
)
1198 strcat (argPtr
, argv
[i
]);
1199 strcat (argPtr
, " ");
1205 argPtr
= (char *) NULL
;
1209 backtrace_command_1 (argPtr
, (argIndicatingFullTrace
>= 0), from_tty
);
1211 if (argIndicatingFullTrace
>= 0 && totArgLen
> 0)
1215 do_cleanups (old_chain
);
1218 static void backtrace_full_command (char *arg
, int from_tty
);
1220 backtrace_full_command (char *arg
, int from_tty
)
1222 backtrace_command_1 (arg
, 1, from_tty
);
1226 /* Print the local variables of a block B active in FRAME.
1227 Return 1 if any variables were printed; 0 otherwise. */
1230 print_block_frame_locals (struct block
*b
, register struct frame_info
*fi
,
1231 int num_tabs
, register struct ui_file
*stream
)
1235 register struct symbol
*sym
;
1236 register int values_printed
= 0;
1238 nsyms
= BLOCK_NSYMS (b
);
1240 for (i
= 0; i
< nsyms
; i
++)
1242 sym
= BLOCK_SYM (b
, i
);
1243 switch (SYMBOL_CLASS (sym
))
1250 for (j
= 0; j
< num_tabs
; j
++)
1251 fputs_filtered ("\t", stream
);
1252 fputs_filtered (SYMBOL_SOURCE_NAME (sym
), stream
);
1253 fputs_filtered (" = ", stream
);
1254 print_variable_value (sym
, fi
, stream
);
1255 fprintf_filtered (stream
, "\n");
1259 /* Ignore symbols which are not locals. */
1263 return values_printed
;
1266 /* Same, but print labels. */
1269 print_block_frame_labels (struct block
*b
, int *have_default
,
1270 register struct ui_file
*stream
)
1274 register struct symbol
*sym
;
1275 register int values_printed
= 0;
1277 nsyms
= BLOCK_NSYMS (b
);
1279 for (i
= 0; i
< nsyms
; i
++)
1281 sym
= BLOCK_SYM (b
, i
);
1282 if (STREQ (SYMBOL_NAME (sym
), "default"))
1288 if (SYMBOL_CLASS (sym
) == LOC_LABEL
)
1290 struct symtab_and_line sal
;
1291 sal
= find_pc_line (SYMBOL_VALUE_ADDRESS (sym
), 0);
1293 fputs_filtered (SYMBOL_SOURCE_NAME (sym
), stream
);
1296 fprintf_filtered (stream
, " ");
1297 print_address_numeric (SYMBOL_VALUE_ADDRESS (sym
), 1, stream
);
1299 fprintf_filtered (stream
, " in file %s, line %d\n",
1300 sal
.symtab
->filename
, sal
.line
);
1303 return values_printed
;
1306 /* Print on STREAM all the local variables in frame FRAME,
1307 including all the blocks active in that frame
1310 Returns 1 if the job was done,
1311 or 0 if nothing was printed because we have no info
1312 on the function running in FRAME. */
1315 print_frame_local_vars (register struct frame_info
*fi
, register int num_tabs
,
1316 register struct ui_file
*stream
)
1318 register struct block
*block
= get_frame_block (fi
);
1319 register int values_printed
= 0;
1323 fprintf_filtered (stream
, "No symbol table info available.\n");
1329 if (print_block_frame_locals (block
, fi
, num_tabs
, stream
))
1331 /* After handling the function's top-level block, stop.
1332 Don't continue to its superblock, the block of
1333 per-file symbols. */
1334 if (BLOCK_FUNCTION (block
))
1336 block
= BLOCK_SUPERBLOCK (block
);
1339 if (!values_printed
)
1341 fprintf_filtered (stream
, "No locals.\n");
1345 /* Same, but print labels. */
1348 print_frame_label_vars (register struct frame_info
*fi
, int this_level_only
,
1349 register struct ui_file
*stream
)
1351 register struct blockvector
*bl
;
1352 register struct block
*block
= get_frame_block (fi
);
1353 register int values_printed
= 0;
1354 int index
, have_default
= 0;
1355 char *blocks_printed
;
1356 CORE_ADDR pc
= fi
->pc
;
1360 fprintf_filtered (stream
, "No symbol table info available.\n");
1364 bl
= blockvector_for_pc (BLOCK_END (block
) - 4, &index
);
1365 blocks_printed
= (char *) alloca (BLOCKVECTOR_NBLOCKS (bl
) * sizeof (char));
1366 memset (blocks_printed
, 0, BLOCKVECTOR_NBLOCKS (bl
) * sizeof (char));
1370 CORE_ADDR end
= BLOCK_END (block
) - 4;
1373 if (bl
!= blockvector_for_pc (end
, &index
))
1374 error ("blockvector blotch");
1375 if (BLOCKVECTOR_BLOCK (bl
, index
) != block
)
1376 error ("blockvector botch");
1377 last_index
= BLOCKVECTOR_NBLOCKS (bl
);
1380 /* Don't print out blocks that have gone by. */
1381 while (index
< last_index
1382 && BLOCK_END (BLOCKVECTOR_BLOCK (bl
, index
)) < pc
)
1385 while (index
< last_index
1386 && BLOCK_END (BLOCKVECTOR_BLOCK (bl
, index
)) < end
)
1388 if (blocks_printed
[index
] == 0)
1390 if (print_block_frame_labels (BLOCKVECTOR_BLOCK (bl
, index
), &have_default
, stream
))
1392 blocks_printed
[index
] = 1;
1398 if (values_printed
&& this_level_only
)
1401 /* After handling the function's top-level block, stop.
1402 Don't continue to its superblock, the block of
1403 per-file symbols. */
1404 if (BLOCK_FUNCTION (block
))
1406 block
= BLOCK_SUPERBLOCK (block
);
1409 if (!values_printed
&& !this_level_only
)
1411 fprintf_filtered (stream
, "No catches.\n");
1417 locals_info (char *args
, int from_tty
)
1419 if (!selected_frame
)
1420 error ("No frame selected.");
1421 print_frame_local_vars (selected_frame
, 0, gdb_stdout
);
1425 catch_info (char *ignore
, int from_tty
)
1427 struct symtab_and_line
*sal
;
1429 /* Check for target support for exception handling */
1430 sal
= target_enable_exception_callback (EX_EVENT_CATCH
, 1);
1433 /* Currently not handling this */
1434 /* Ideally, here we should interact with the C++ runtime
1435 system to find the list of active handlers, etc. */
1436 fprintf_filtered (gdb_stdout
, "Info catch not supported with this target/compiler combination.\n");
1438 if (!selected_frame
)
1439 error ("No frame selected.");
1444 /* Assume g++ compiled code -- old v 4.16 behaviour */
1445 if (!selected_frame
)
1446 error ("No frame selected.");
1448 print_frame_label_vars (selected_frame
, 0, gdb_stdout
);
1453 print_frame_arg_vars (register struct frame_info
*fi
,
1454 register struct ui_file
*stream
)
1456 struct symbol
*func
= get_frame_function (fi
);
1457 register struct block
*b
;
1460 register struct symbol
*sym
, *sym2
;
1461 register int values_printed
= 0;
1465 fprintf_filtered (stream
, "No symbol table info available.\n");
1469 b
= SYMBOL_BLOCK_VALUE (func
);
1470 nsyms
= BLOCK_NSYMS (b
);
1472 for (i
= 0; i
< nsyms
; i
++)
1474 sym
= BLOCK_SYM (b
, i
);
1475 switch (SYMBOL_CLASS (sym
))
1481 case LOC_REGPARM_ADDR
:
1482 case LOC_BASEREG_ARG
:
1484 fputs_filtered (SYMBOL_SOURCE_NAME (sym
), stream
);
1485 fputs_filtered (" = ", stream
);
1487 /* We have to look up the symbol because arguments can have
1488 two entries (one a parameter, one a local) and the one we
1489 want is the local, which lookup_symbol will find for us.
1490 This includes gcc1 (not gcc2) on the sparc when passing a
1491 small structure and gcc2 when the argument type is float
1492 and it is passed as a double and converted to float by
1493 the prologue (in the latter case the type of the LOC_ARG
1494 symbol is double and the type of the LOC_LOCAL symbol is
1495 float). There are also LOC_ARG/LOC_REGISTER pairs which
1496 are not combined in symbol-reading. */
1498 sym2
= lookup_symbol (SYMBOL_NAME (sym
),
1499 b
, VAR_NAMESPACE
, (int *) NULL
, (struct symtab
**) NULL
);
1500 print_variable_value (sym2
, fi
, stream
);
1501 fprintf_filtered (stream
, "\n");
1505 /* Don't worry about things which aren't arguments. */
1510 if (!values_printed
)
1512 fprintf_filtered (stream
, "No arguments.\n");
1517 args_info (char *ignore
, int from_tty
)
1519 if (!selected_frame
)
1520 error ("No frame selected.");
1521 print_frame_arg_vars (selected_frame
, gdb_stdout
);
1526 args_plus_locals_info (char *ignore
, int from_tty
)
1528 args_info (ignore
, from_tty
);
1529 locals_info (ignore
, from_tty
);
1533 /* Select frame FI, and note that its stack level is LEVEL.
1534 LEVEL may be -1 if an actual level number is not known. */
1537 select_frame (struct frame_info
*fi
, int level
)
1539 register struct symtab
*s
;
1541 selected_frame
= fi
;
1542 selected_frame_level
= level
;
1543 if (selected_frame_level_changed_hook
)
1544 selected_frame_level_changed_hook (level
);
1546 /* Ensure that symbols for this frame are read in. Also, determine the
1547 source language of this frame, and switch to it if desired. */
1550 s
= find_pc_symtab (fi
->pc
);
1552 && s
->language
!= current_language
->la_language
1553 && s
->language
!= language_unknown
1554 && language_mode
== language_mode_auto
)
1556 set_language (s
->language
);
1558 /* elz: this if here fixes the problem with the pc not being displayed
1559 in the tui asm layout, with no debug symbols. The value of s
1560 would be 0 here, and select_source_symtab would abort the
1561 command by calling the 'error' function */
1564 TUIDO (((TuiOpaqueFuncPtr
) tui_vSelectSourceSymtab
, s
));
1570 /* Select frame FI, noting that its stack level is LEVEL. Also print
1571 the stack frame and show the source if this is the tui version. */
1573 select_and_print_frame (struct frame_info
*fi
, int level
)
1575 select_frame (fi
, level
);
1578 print_stack_frame (fi
, level
, 1);
1579 TUIDO (((TuiOpaqueFuncPtr
) tui_vCheckDataValues
, fi
));
1584 /* Select frame FI, noting that its stack level is LEVEL. Be silent if
1588 select_and_maybe_print_frame (struct frame_info
*fi
, int level
)
1591 select_frame (fi
, level
);
1593 select_and_print_frame (fi
, level
);
1598 /* Store the selected frame and its level into *FRAMEP and *LEVELP.
1599 If there is no selected frame, *FRAMEP is set to NULL. */
1602 record_selected_frame (CORE_ADDR
*frameaddrp
, int *levelp
)
1604 *frameaddrp
= selected_frame
? selected_frame
->frame
: 0;
1605 *levelp
= selected_frame_level
;
1608 /* Return the symbol-block in which the selected frame is executing.
1609 Can return zero under various legitimate circumstances. */
1612 get_selected_block (void)
1614 if (!target_has_stack
)
1617 if (!selected_frame
)
1618 return get_current_block ();
1619 return get_frame_block (selected_frame
);
1622 /* Find a frame a certain number of levels away from FRAME.
1623 LEVEL_OFFSET_PTR points to an int containing the number of levels.
1624 Positive means go to earlier frames (up); negative, the reverse.
1625 The int that contains the number of levels is counted toward
1626 zero as the frames for those levels are found.
1627 If the top or bottom frame is reached, that frame is returned,
1628 but the final value of *LEVEL_OFFSET_PTR is nonzero and indicates
1629 how much farther the original request asked to go. */
1632 find_relative_frame (register struct frame_info
*frame
,
1633 register int *level_offset_ptr
)
1635 register struct frame_info
*prev
;
1636 register struct frame_info
*frame1
;
1638 /* Going up is simple: just do get_prev_frame enough times
1639 or until initial frame is reached. */
1640 while (*level_offset_ptr
> 0)
1642 prev
= get_prev_frame (frame
);
1645 (*level_offset_ptr
)--;
1648 /* Going down is just as simple. */
1649 if (*level_offset_ptr
< 0)
1651 while (*level_offset_ptr
< 0)
1653 frame1
= get_next_frame (frame
);
1657 (*level_offset_ptr
)++;
1663 /* The "select_frame" command. With no arg, NOP.
1664 With arg LEVEL_EXP, select the frame at level LEVEL if it is a
1665 valid level. Otherwise, treat level_exp as an address expression
1666 and select it. See parse_frame_specification for more info on proper
1667 frame expressions. */
1672 select_frame_command_wrapper (char *level_exp
, int from_tty
)
1674 select_frame_command (level_exp
, from_tty
);
1678 select_frame_command (char *level_exp
, int from_tty
)
1680 register struct frame_info
*frame
, *frame1
;
1681 unsigned int level
= 0;
1683 if (!target_has_stack
)
1684 error ("No stack.");
1686 frame
= parse_frame_specification (level_exp
);
1688 /* Try to figure out what level this frame is. But if there is
1689 no current stack, don't error out -- let the user set one. */
1691 if (get_current_frame ())
1693 for (frame1
= get_prev_frame (0);
1694 frame1
&& frame1
!= frame
;
1695 frame1
= get_prev_frame (frame1
))
1702 select_frame (frame
, level
);
1705 /* The "frame" command. With no arg, print selected frame briefly.
1706 With arg, behaves like select_frame and then prints the selected
1710 frame_command (char *level_exp
, int from_tty
)
1712 select_frame_command (level_exp
, from_tty
);
1713 show_and_print_stack_frame (selected_frame
, selected_frame_level
, 1);
1716 /* The XDB Compatibility command to print the current frame. */
1719 current_frame_command (char *level_exp
, int from_tty
)
1721 if (target_has_stack
== 0 || selected_frame
== 0)
1722 error ("No stack.");
1723 print_only_stack_frame (selected_frame
, selected_frame_level
, 1);
1726 /* Select the frame up one or COUNT stack levels
1727 from the previously selected frame, and print it briefly. */
1731 up_silently_base (char *count_exp
)
1733 register struct frame_info
*fi
;
1734 int count
= 1, count1
;
1736 count
= parse_and_eval_long (count_exp
);
1739 if (target_has_stack
== 0 || selected_frame
== 0)
1740 error ("No stack.");
1742 fi
= find_relative_frame (selected_frame
, &count1
);
1743 if (count1
!= 0 && count_exp
== 0)
1744 error ("Initial frame selected; you cannot go up.");
1745 select_frame (fi
, selected_frame_level
+ count
- count1
);
1749 up_silently_command (char *count_exp
, int from_tty
)
1751 up_silently_base (count_exp
);
1753 print_stack_frame (selected_frame
, selected_frame_level
, 1);
1757 up_command (char *count_exp
, int from_tty
)
1759 up_silently_base (count_exp
);
1760 show_and_print_stack_frame (selected_frame
, selected_frame_level
, 1);
1763 /* Select the frame down one or COUNT stack levels
1764 from the previously selected frame, and print it briefly. */
1768 down_silently_base (char *count_exp
)
1770 register struct frame_info
*frame
;
1771 int count
= -1, count1
;
1773 count
= -parse_and_eval_long (count_exp
);
1776 if (target_has_stack
== 0 || selected_frame
== 0)
1777 error ("No stack.");
1779 frame
= find_relative_frame (selected_frame
, &count1
);
1780 if (count1
!= 0 && count_exp
== 0)
1783 /* We only do this if count_exp is not specified. That way "down"
1784 means to really go down (and let me know if that is
1785 impossible), but "down 9999" can be used to mean go all the way
1786 down without getting an error. */
1788 error ("Bottom (i.e., innermost) frame selected; you cannot go down.");
1791 select_frame (frame
, selected_frame_level
+ count
- count1
);
1796 down_silently_command (char *count_exp
, int from_tty
)
1798 down_silently_base (count_exp
);
1800 print_stack_frame (selected_frame
, selected_frame_level
, 1);
1804 down_command (char *count_exp
, int from_tty
)
1806 down_silently_base (count_exp
);
1807 show_and_print_stack_frame (selected_frame
, selected_frame_level
, 1);
1812 return_command_wrapper (char *retval_exp
, int from_tty
)
1814 return_command (retval_exp
, from_tty
);
1818 return_command (char *retval_exp
, int from_tty
)
1820 struct symbol
*thisfun
;
1821 CORE_ADDR selected_frame_addr
;
1822 CORE_ADDR selected_frame_pc
;
1823 struct frame_info
*frame
;
1824 value_ptr return_value
= NULL
;
1826 if (selected_frame
== NULL
)
1827 error ("No selected frame.");
1828 thisfun
= get_frame_function (selected_frame
);
1829 selected_frame_addr
= FRAME_FP (selected_frame
);
1830 selected_frame_pc
= selected_frame
->pc
;
1832 /* Compute the return value (if any -- possibly getting errors here). */
1836 struct type
*return_type
= NULL
;
1838 return_value
= parse_and_eval (retval_exp
);
1840 /* Cast return value to the return type of the function. */
1841 if (thisfun
!= NULL
)
1842 return_type
= TYPE_TARGET_TYPE (SYMBOL_TYPE (thisfun
));
1843 if (return_type
== NULL
)
1844 return_type
= builtin_type_int
;
1845 return_value
= value_cast (return_type
, return_value
);
1847 /* Make sure we have fully evaluated it, since
1848 it might live in the stack frame we're about to pop. */
1849 if (VALUE_LAZY (return_value
))
1850 value_fetch_lazy (return_value
);
1853 /* If interactive, require confirmation. */
1859 if (!query ("Make %s return now? ", SYMBOL_SOURCE_NAME (thisfun
)))
1861 error ("Not confirmed.");
1865 else if (!query ("Make selected stack frame return now? "))
1866 error ("Not confirmed.");
1869 /* Do the real work. Pop until the specified frame is current. We
1870 use this method because the selected_frame is not valid after
1871 a POP_FRAME. The pc comparison makes this work even if the
1872 selected frame shares its fp with another frame. */
1874 while (selected_frame_addr
!= (frame
= get_current_frame ())->frame
1875 || selected_frame_pc
!= frame
->pc
)
1878 /* Then pop that frame. */
1882 /* Compute the return value (if any) and store in the place
1883 for return values. */
1886 set_return_value (return_value
);
1888 /* If we are at the end of a call dummy now, pop the dummy frame too. */
1890 if (CALL_DUMMY_HAS_COMPLETED (read_pc(), read_sp (),
1891 FRAME_FP (get_current_frame ())))
1894 /* If interactive, print the frame that is now current. */
1897 frame_command ("0", 1);
1899 select_frame_command ("0", 0);
1902 /* Sets the scope to input function name, provided that the
1903 function is within the current stack frame */
1905 struct function_bounds
1907 CORE_ADDR low
, high
;
1910 static void func_command (char *arg
, int from_tty
);
1912 func_command (char *arg
, int from_tty
)
1914 struct frame_info
*fp
;
1916 struct symtabs_and_lines sals
;
1919 struct function_bounds
*func_bounds
= (struct function_bounds
*) NULL
;
1921 if (arg
!= (char *) NULL
)
1924 fp
= parse_frame_specification ("0");
1925 sals
= decode_line_spec (arg
, 1);
1926 func_bounds
= (struct function_bounds
*) xmalloc (
1927 sizeof (struct function_bounds
) * sals
.nelts
);
1928 for (i
= 0; (i
< sals
.nelts
&& !found
); i
++)
1930 if (sals
.sals
[i
].pc
== (CORE_ADDR
) 0 ||
1931 find_pc_partial_function (sals
.sals
[i
].pc
,
1933 &func_bounds
[i
].low
,
1934 &func_bounds
[i
].high
) == 0)
1936 func_bounds
[i
].low
=
1937 func_bounds
[i
].high
= (CORE_ADDR
) NULL
;
1943 for (i
= 0; (i
< sals
.nelts
&& !found
); i
++)
1944 found
= (fp
->pc
>= func_bounds
[i
].low
&&
1945 fp
->pc
< func_bounds
[i
].high
);
1949 fp
= find_relative_frame (fp
, &level
);
1952 while (!found
&& level
== 0);
1955 xfree (func_bounds
);
1958 printf_filtered ("'%s' not within current stack frame.\n", arg
);
1959 else if (fp
!= selected_frame
)
1960 select_and_print_frame (fp
, level
);
1963 /* Gets the language of the current frame. */
1966 get_frame_language (void)
1968 register struct symtab
*s
;
1969 enum language flang
; /* The language of the current frame */
1973 s
= find_pc_symtab (selected_frame
->pc
);
1975 flang
= s
->language
;
1977 flang
= language_unknown
;
1980 flang
= language_unknown
;
1986 _initialize_stack (void)
1989 backtrace_limit
= 30;
1992 add_com ("return", class_stack
, return_command
,
1993 "Make selected stack frame return to its caller.\n\
1994 Control remains in the debugger, but when you continue\n\
1995 execution will resume in the frame above the one now selected.\n\
1996 If an argument is given, it is an expression for the value to return.");
1998 add_com ("up", class_stack
, up_command
,
1999 "Select and print stack frame that called this one.\n\
2000 An argument says how many frames up to go.");
2001 add_com ("up-silently", class_support
, up_silently_command
,
2002 "Same as the `up' command, but does not print anything.\n\
2003 This is useful in command scripts.");
2005 add_com ("down", class_stack
, down_command
,
2006 "Select and print stack frame called by this one.\n\
2007 An argument says how many frames down to go.");
2008 add_com_alias ("do", "down", class_stack
, 1);
2009 add_com_alias ("dow", "down", class_stack
, 1);
2010 add_com ("down-silently", class_support
, down_silently_command
,
2011 "Same as the `down' command, but does not print anything.\n\
2012 This is useful in command scripts.");
2014 add_com ("frame", class_stack
, frame_command
,
2015 "Select and print a stack frame.\n\
2016 With no argument, print the selected stack frame. (See also \"info frame\").\n\
2017 An argument specifies the frame to select.\n\
2018 It can be a stack frame number or the address of the frame.\n\
2019 With argument, nothing is printed if input is coming from\n\
2020 a command file or a user-defined command.");
2022 add_com_alias ("f", "frame", class_stack
, 1);
2026 add_com ("L", class_stack
, current_frame_command
,
2027 "Print the current stack frame.\n");
2028 add_com_alias ("V", "frame", class_stack
, 1);
2030 add_com ("select-frame", class_stack
, select_frame_command
,
2031 "Select a stack frame without printing anything.\n\
2032 An argument specifies the frame to select.\n\
2033 It can be a stack frame number or the address of the frame.\n");
2035 add_com ("backtrace", class_stack
, backtrace_command
,
2036 "Print backtrace of all stack frames, or innermost COUNT frames.\n\
2037 With a negative argument, print outermost -COUNT frames.\n\
2038 Use of the 'full' qualifier also prints the values of the local variables.\n");
2039 add_com_alias ("bt", "backtrace", class_stack
, 0);
2042 add_com_alias ("t", "backtrace", class_stack
, 0);
2043 add_com ("T", class_stack
, backtrace_full_command
,
2044 "Print backtrace of all stack frames, or innermost COUNT frames \n\
2045 and the values of the local variables.\n\
2046 With a negative argument, print outermost -COUNT frames.\n\
2047 Usage: T <count>\n");
2050 add_com_alias ("where", "backtrace", class_alias
, 0);
2051 add_info ("stack", backtrace_command
,
2052 "Backtrace of the stack, or innermost COUNT frames.");
2053 add_info_alias ("s", "stack", 1);
2054 add_info ("frame", frame_info
,
2055 "All about selected stack frame, or frame at ADDR.");
2056 add_info_alias ("f", "frame", 1);
2057 add_info ("locals", locals_info
,
2058 "Local variables of current stack frame.");
2059 add_info ("args", args_info
,
2060 "Argument variables of current stack frame.");
2062 add_com ("l", class_info
, args_plus_locals_info
,
2063 "Argument and local variables of current stack frame.");
2066 add_com ("func", class_stack
, func_command
,
2067 "Select the stack frame that contains <func>.\nUsage: func <name>\n");
2069 add_info ("catch", catch_info
,
2070 "Exceptions that can be caught in the current stack frame.");
2073 add_cmd ("backtrace-limit", class_stack
, set_backtrace_limit_command
,
2074 "Specify maximum number of frames for \"backtrace\" to print by default.",
2076 add_info ("backtrace-limit", backtrace_limit_info
,
2077 "The maximum number of frames for \"backtrace\" to print by default.");