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
];
710 char *addr_string
, *p
;
711 struct cleanup
*tmp_cleanup
;
713 while (*frame_exp
== ' ')
718 if (numargs
> MAXARGS
)
719 error ("Too many args in frame specification");
720 /* Parse an argument. */
721 for (p
= frame_exp
; *p
&& *p
!= ' '; p
++)
723 addr_string
= savestring (frame_exp
, p
- frame_exp
);
726 tmp_cleanup
= make_cleanup (xfree
, addr_string
);
727 args
[numargs
++] = parse_and_eval_address (addr_string
);
728 do_cleanups (tmp_cleanup
);
731 /* Skip spaces, move to possible next arg. */
741 if (selected_frame
== NULL
)
742 error ("No selected frame.");
743 return selected_frame
;
748 struct frame_info
*fid
=
749 find_relative_frame (get_current_frame (), &level
);
750 struct frame_info
*tfid
;
753 /* find_relative_frame was successful */
756 /* If SETUP_ARBITRARY_FRAME is defined, then frame specifications
757 take at least 2 addresses. It is important to detect this case
758 here so that "frame 100" does not give a confusing error message
759 like "frame specification requires two addresses". This of course
760 does not solve the "frame 100" problem for machines on which
761 a frame specification can be made with one address. To solve
762 that, we need a new syntax for a specifying a frame by address.
763 I think the cleanest syntax is $frame(0x45) ($frame(0x23,0x45) for
764 two args, etc.), but people might think that is too much typing,
765 so I guess *0x23,0x45 would be a possible alternative (commas
766 really should be used instead of spaces to delimit; using spaces
767 normally works in an expression). */
768 #ifdef SETUP_ARBITRARY_FRAME
769 error ("No frame %d", args
[0]);
772 /* If (s)he specifies the frame with an address, he deserves what
773 (s)he gets. Still, give the highest one that matches. */
775 for (fid
= get_current_frame ();
776 fid
&& fid
->frame
!= args
[0];
777 fid
= get_prev_frame (fid
))
781 while ((tfid
= get_prev_frame (fid
)) &&
782 (tfid
->frame
== args
[0]))
785 /* We couldn't identify the frame as an existing frame, but
786 perhaps we can create one with a single argument. */
790 #ifdef SETUP_ARBITRARY_FRAME
791 return SETUP_ARBITRARY_FRAME (numargs
, args
);
793 /* Usual case. Do it here rather than have everyone supply
794 a SETUP_ARBITRARY_FRAME that does this. */
796 return create_new_frame (args
[0], 0);
797 error ("Too many args in frame specification");
804 /* FRAME_ARGS_ADDRESS_CORRECT is just like FRAME_ARGS_ADDRESS except
805 that if it is unsure about the answer, it returns 0
806 instead of guessing (this happens on the VAX and i960, for example).
808 On most machines, we never have to guess about the args address,
809 so FRAME_ARGS_ADDRESS{,_CORRECT} are the same. */
810 #if !defined (FRAME_ARGS_ADDRESS_CORRECT)
811 #define FRAME_ARGS_ADDRESS_CORRECT FRAME_ARGS_ADDRESS
814 /* Print verbosely the selected frame or the frame at address ADDR.
815 This means absolutely all information in the frame is printed. */
818 frame_info (char *addr_exp
, int from_tty
)
820 struct frame_info
*fi
;
821 struct symtab_and_line sal
;
824 struct frame_info
*calling_frame_info
;
825 int i
, count
, numregs
;
827 enum language funlang
= language_unknown
;
829 if (!target_has_stack
)
832 fi
= parse_frame_specification (addr_exp
);
834 error ("Invalid frame specified.");
836 sal
= find_pc_line (fi
->pc
,
838 && !fi
->next
->signal_handler_caller
839 && !frame_in_dummy (fi
->next
));
840 func
= get_frame_function (fi
);
841 s
= find_pc_symtab (fi
->pc
);
844 /* I'd like to use SYMBOL_SOURCE_NAME() here, to display
845 * the demangled name that we already have stored in
846 * the symbol table, but we stored a version with
847 * DMGL_PARAMS turned on, and here we don't want
848 * to display parameters. So call the demangler again,
849 * with DMGL_ANSI only. RT
850 * (Yes, I know that printf_symbol_filtered() will
851 * again try to demangle the name on the fly, but
852 * the issue is that if cplus_demangle() fails here,
853 * it'll fail there too. So we want to catch the failure
854 * ("demangled==NULL" case below) here, while we still
855 * have our hands on the function symbol.)
858 funname
= SYMBOL_NAME (func
);
859 funlang
= SYMBOL_LANGUAGE (func
);
860 if (funlang
== language_cplus
)
862 demangled
= cplus_demangle (funname
, DMGL_ANSI
);
863 /* If the demangler fails, try the demangled name
864 * from the symbol table. This'll have parameters,
865 * but that's preferable to diplaying a mangled name.
867 if (demangled
== NULL
)
868 funname
= SYMBOL_SOURCE_NAME (func
);
873 register struct minimal_symbol
*msymbol
= lookup_minimal_symbol_by_pc (fi
->pc
);
876 funname
= SYMBOL_NAME (msymbol
);
877 funlang
= SYMBOL_LANGUAGE (msymbol
);
880 calling_frame_info
= get_prev_frame (fi
);
882 if (!addr_exp
&& selected_frame_level
>= 0)
884 printf_filtered ("Stack level %d, frame at ", selected_frame_level
);
885 print_address_numeric (fi
->frame
, 1, gdb_stdout
);
886 printf_filtered (":\n");
890 printf_filtered ("Stack frame at ");
891 print_address_numeric (fi
->frame
, 1, gdb_stdout
);
892 printf_filtered (":\n");
894 printf_filtered (" %s = ", REGISTER_NAME (PC_REGNUM
));
895 print_address_numeric (fi
->pc
, 1, gdb_stdout
);
900 printf_filtered (" in ");
901 fprintf_symbol_filtered (gdb_stdout
, funname
, funlang
,
902 DMGL_ANSI
| DMGL_PARAMS
);
906 printf_filtered (" (%s:%d)", sal
.symtab
->filename
, sal
.line
);
907 puts_filtered ("; ");
909 printf_filtered ("saved %s ", REGISTER_NAME (PC_REGNUM
));
910 print_address_numeric (FRAME_SAVED_PC (fi
), 1, gdb_stdout
);
911 printf_filtered ("\n");
915 frameless
= FRAMELESS_FUNCTION_INVOCATION (fi
);
917 printf_filtered (" (FRAMELESS),");
920 if (calling_frame_info
)
922 printf_filtered (" called by frame at ");
923 print_address_numeric (calling_frame_info
->frame
, 1, gdb_stdout
);
925 if (fi
->next
&& calling_frame_info
)
930 printf_filtered (" caller of frame at ");
931 print_address_numeric (fi
->next
->frame
, 1, gdb_stdout
);
933 if (fi
->next
|| calling_frame_info
)
934 puts_filtered ("\n");
936 printf_filtered (" source language %s.\n", language_str (s
->language
));
938 #ifdef PRINT_EXTRA_FRAME_INFO
939 PRINT_EXTRA_FRAME_INFO (fi
);
943 /* Address of the argument list for this frame, or 0. */
944 CORE_ADDR arg_list
= FRAME_ARGS_ADDRESS_CORRECT (fi
);
945 /* Number of args for this frame, or -1 if unknown. */
949 printf_filtered (" Arglist at unknown address.\n");
952 printf_filtered (" Arglist at ");
953 print_address_numeric (arg_list
, 1, gdb_stdout
);
954 printf_filtered (",");
956 numargs
= FRAME_NUM_ARGS (fi
);
958 puts_filtered (" args: ");
959 else if (numargs
== 0)
960 puts_filtered (" no args.");
961 else if (numargs
== 1)
962 puts_filtered (" 1 arg: ");
964 printf_filtered (" %d args: ", numargs
);
965 print_frame_args (func
, fi
, numargs
, gdb_stdout
);
966 puts_filtered ("\n");
970 /* Address of the local variables for this frame, or 0. */
971 CORE_ADDR arg_list
= FRAME_LOCALS_ADDRESS (fi
);
974 printf_filtered (" Locals at unknown address,");
977 printf_filtered (" Locals at ");
978 print_address_numeric (arg_list
, 1, gdb_stdout
);
979 printf_filtered (",");
983 FRAME_INIT_SAVED_REGS (fi
);
984 if (fi
->saved_regs
!= NULL
)
986 /* The sp is special; what's returned isn't the save address, but
987 actually the value of the previous frame's sp. */
988 printf_filtered (" Previous frame's sp is ");
989 print_address_numeric (fi
->saved_regs
[SP_REGNUM
], 1, gdb_stdout
);
990 printf_filtered ("\n");
992 numregs
= ARCH_NUM_REGS
;
993 for (i
= 0; i
< numregs
; i
++)
994 if (fi
->saved_regs
[i
] && i
!= SP_REGNUM
)
997 puts_filtered (" Saved registers:\n ");
1001 printf_filtered (" %s at ", REGISTER_NAME (i
));
1002 print_address_numeric (fi
->saved_regs
[i
], 1, gdb_stdout
);
1006 puts_filtered ("\n");
1010 /* We could get some information about saved registers by
1011 calling get_saved_register on each register. Which info goes
1012 with which frame is necessarily lost, however, and I suspect
1013 that the users don't care whether they get the info. */
1014 puts_filtered ("\n");
1019 /* Set a limit on the number of frames printed by default in a
1022 static int backtrace_limit
;
1025 set_backtrace_limit_command (char *count_exp
, int from_tty
)
1027 int count
= parse_and_eval_long (count_exp
);
1030 error ("Negative argument not meaningful as backtrace limit.");
1032 backtrace_limit
= count
;
1036 backtrace_limit_info (char *arg
, int from_tty
)
1039 error ("\"Info backtrace-limit\" takes no arguments.");
1041 printf_unfiltered ("Backtrace limit: %d.\n", backtrace_limit
);
1045 /* Print briefly all stack frames or just the innermost COUNT frames. */
1047 static void backtrace_command_1 (char *count_exp
, int show_locals
,
1050 backtrace_command_1 (char *count_exp
, int show_locals
, int from_tty
)
1052 struct frame_info
*fi
;
1055 register struct frame_info
*trailing
;
1056 register int trailing_level
;
1058 if (!target_has_stack
)
1059 error ("No stack.");
1061 /* The following code must do two things. First, it must
1062 set the variable TRAILING to the frame from which we should start
1063 printing. Second, it must set the variable count to the number
1064 of frames which we should print, or -1 if all of them. */
1065 trailing
= get_current_frame ();
1067 /* The target can be in a state where there is no valid frames
1068 (e.g., just connected). */
1069 if (trailing
== NULL
)
1070 error ("No stack.");
1075 count
= parse_and_eval_long (count_exp
);
1078 struct frame_info
*current
;
1083 while (current
&& count
--)
1086 current
= get_prev_frame (current
);
1089 /* Will stop when CURRENT reaches the top of the stack. TRAILING
1090 will be COUNT below it. */
1094 trailing
= get_prev_frame (trailing
);
1095 current
= get_prev_frame (current
);
1107 struct partial_symtab
*ps
;
1109 /* Read in symbols for all of the frames. Need to do this in
1110 a separate pass so that "Reading in symbols for xxx" messages
1111 don't screw up the appearance of the backtrace. Also
1112 if people have strong opinions against reading symbols for
1113 backtrace this may have to be an option. */
1117 fi
= get_prev_frame (fi
))
1120 ps
= find_pc_psymtab (fi
->pc
);
1122 PSYMTAB_TO_SYMTAB (ps
); /* Force syms to come in */
1126 for (i
= 0, fi
= trailing
;
1128 i
++, fi
= get_prev_frame (fi
))
1132 /* Don't use print_stack_frame; if an error() occurs it probably
1133 means further attempts to backtrace would fail (on the other
1134 hand, perhaps the code does or could be fixed to make sure
1135 the frame->prev field gets set to NULL in that case). */
1136 print_frame_info_base (fi
, trailing_level
+ i
, 0, 1);
1138 print_frame_local_vars (fi
, 1, gdb_stdout
);
1141 /* If we've stopped before the end, mention that. */
1143 printf_filtered ("(More stack frames follow...)\n");
1147 backtrace_command (char *arg
, int from_tty
)
1149 struct cleanup
*old_chain
= (struct cleanup
*) NULL
;
1150 char **argv
= (char **) NULL
;
1151 int argIndicatingFullTrace
= (-1), totArgLen
= 0, argc
= 0;
1154 if (arg
!= (char *) NULL
)
1158 argv
= buildargv (arg
);
1159 old_chain
= make_cleanup_freeargv (argv
);
1161 for (i
= 0; (argv
[i
] != (char *) NULL
); i
++)
1165 for (j
= 0; (j
< strlen (argv
[i
])); j
++)
1166 argv
[i
][j
] = tolower (argv
[i
][j
]);
1168 if (argIndicatingFullTrace
< 0 && subset_compare (argv
[i
], "full"))
1169 argIndicatingFullTrace
= argc
;
1173 totArgLen
+= strlen (argv
[i
]);
1177 if (argIndicatingFullTrace
>= 0)
1181 argPtr
= (char *) xmalloc (totArgLen
+ 1);
1186 memset (argPtr
, 0, totArgLen
+ 1);
1187 for (i
= 0; (i
< (argc
+ 1)); i
++)
1189 if (i
!= argIndicatingFullTrace
)
1191 strcat (argPtr
, argv
[i
]);
1192 strcat (argPtr
, " ");
1198 argPtr
= (char *) NULL
;
1202 backtrace_command_1 (argPtr
, (argIndicatingFullTrace
>= 0), from_tty
);
1204 if (argIndicatingFullTrace
>= 0 && totArgLen
> 0)
1208 do_cleanups (old_chain
);
1211 static void backtrace_full_command (char *arg
, int from_tty
);
1213 backtrace_full_command (char *arg
, int from_tty
)
1215 backtrace_command_1 (arg
, 1, from_tty
);
1219 /* Print the local variables of a block B active in FRAME.
1220 Return 1 if any variables were printed; 0 otherwise. */
1223 print_block_frame_locals (struct block
*b
, register struct frame_info
*fi
,
1224 int num_tabs
, register struct ui_file
*stream
)
1228 register struct symbol
*sym
;
1229 register int values_printed
= 0;
1231 nsyms
= BLOCK_NSYMS (b
);
1233 for (i
= 0; i
< nsyms
; i
++)
1235 sym
= BLOCK_SYM (b
, i
);
1236 switch (SYMBOL_CLASS (sym
))
1243 for (j
= 0; j
< num_tabs
; j
++)
1244 fputs_filtered ("\t", stream
);
1245 fputs_filtered (SYMBOL_SOURCE_NAME (sym
), stream
);
1246 fputs_filtered (" = ", stream
);
1247 print_variable_value (sym
, fi
, stream
);
1248 fprintf_filtered (stream
, "\n");
1252 /* Ignore symbols which are not locals. */
1256 return values_printed
;
1259 /* Same, but print labels. */
1262 print_block_frame_labels (struct block
*b
, int *have_default
,
1263 register struct ui_file
*stream
)
1267 register struct symbol
*sym
;
1268 register int values_printed
= 0;
1270 nsyms
= BLOCK_NSYMS (b
);
1272 for (i
= 0; i
< nsyms
; i
++)
1274 sym
= BLOCK_SYM (b
, i
);
1275 if (STREQ (SYMBOL_NAME (sym
), "default"))
1281 if (SYMBOL_CLASS (sym
) == LOC_LABEL
)
1283 struct symtab_and_line sal
;
1284 sal
= find_pc_line (SYMBOL_VALUE_ADDRESS (sym
), 0);
1286 fputs_filtered (SYMBOL_SOURCE_NAME (sym
), stream
);
1289 fprintf_filtered (stream
, " ");
1290 print_address_numeric (SYMBOL_VALUE_ADDRESS (sym
), 1, stream
);
1292 fprintf_filtered (stream
, " in file %s, line %d\n",
1293 sal
.symtab
->filename
, sal
.line
);
1296 return values_printed
;
1299 /* Print on STREAM all the local variables in frame FRAME,
1300 including all the blocks active in that frame
1303 Returns 1 if the job was done,
1304 or 0 if nothing was printed because we have no info
1305 on the function running in FRAME. */
1308 print_frame_local_vars (register struct frame_info
*fi
, register int num_tabs
,
1309 register struct ui_file
*stream
)
1311 register struct block
*block
= get_frame_block (fi
);
1312 register int values_printed
= 0;
1316 fprintf_filtered (stream
, "No symbol table info available.\n");
1322 if (print_block_frame_locals (block
, fi
, num_tabs
, stream
))
1324 /* After handling the function's top-level block, stop.
1325 Don't continue to its superblock, the block of
1326 per-file symbols. */
1327 if (BLOCK_FUNCTION (block
))
1329 block
= BLOCK_SUPERBLOCK (block
);
1332 if (!values_printed
)
1334 fprintf_filtered (stream
, "No locals.\n");
1338 /* Same, but print labels. */
1341 print_frame_label_vars (register struct frame_info
*fi
, int this_level_only
,
1342 register struct ui_file
*stream
)
1344 register struct blockvector
*bl
;
1345 register struct block
*block
= get_frame_block (fi
);
1346 register int values_printed
= 0;
1347 int index
, have_default
= 0;
1348 char *blocks_printed
;
1349 CORE_ADDR pc
= fi
->pc
;
1353 fprintf_filtered (stream
, "No symbol table info available.\n");
1357 bl
= blockvector_for_pc (BLOCK_END (block
) - 4, &index
);
1358 blocks_printed
= (char *) alloca (BLOCKVECTOR_NBLOCKS (bl
) * sizeof (char));
1359 memset (blocks_printed
, 0, BLOCKVECTOR_NBLOCKS (bl
) * sizeof (char));
1363 CORE_ADDR end
= BLOCK_END (block
) - 4;
1366 if (bl
!= blockvector_for_pc (end
, &index
))
1367 error ("blockvector blotch");
1368 if (BLOCKVECTOR_BLOCK (bl
, index
) != block
)
1369 error ("blockvector botch");
1370 last_index
= BLOCKVECTOR_NBLOCKS (bl
);
1373 /* Don't print out blocks that have gone by. */
1374 while (index
< last_index
1375 && BLOCK_END (BLOCKVECTOR_BLOCK (bl
, index
)) < pc
)
1378 while (index
< last_index
1379 && BLOCK_END (BLOCKVECTOR_BLOCK (bl
, index
)) < end
)
1381 if (blocks_printed
[index
] == 0)
1383 if (print_block_frame_labels (BLOCKVECTOR_BLOCK (bl
, index
), &have_default
, stream
))
1385 blocks_printed
[index
] = 1;
1391 if (values_printed
&& this_level_only
)
1394 /* After handling the function's top-level block, stop.
1395 Don't continue to its superblock, the block of
1396 per-file symbols. */
1397 if (BLOCK_FUNCTION (block
))
1399 block
= BLOCK_SUPERBLOCK (block
);
1402 if (!values_printed
&& !this_level_only
)
1404 fprintf_filtered (stream
, "No catches.\n");
1410 locals_info (char *args
, int from_tty
)
1412 if (!selected_frame
)
1413 error ("No frame selected.");
1414 print_frame_local_vars (selected_frame
, 0, gdb_stdout
);
1418 catch_info (char *ignore
, int from_tty
)
1420 struct symtab_and_line
*sal
;
1422 /* Check for target support for exception handling */
1423 sal
= target_enable_exception_callback (EX_EVENT_CATCH
, 1);
1426 /* Currently not handling this */
1427 /* Ideally, here we should interact with the C++ runtime
1428 system to find the list of active handlers, etc. */
1429 fprintf_filtered (gdb_stdout
, "Info catch not supported with this target/compiler combination.\n");
1431 if (!selected_frame
)
1432 error ("No frame selected.");
1437 /* Assume g++ compiled code -- old v 4.16 behaviour */
1438 if (!selected_frame
)
1439 error ("No frame selected.");
1441 print_frame_label_vars (selected_frame
, 0, gdb_stdout
);
1446 print_frame_arg_vars (register struct frame_info
*fi
,
1447 register struct ui_file
*stream
)
1449 struct symbol
*func
= get_frame_function (fi
);
1450 register struct block
*b
;
1453 register struct symbol
*sym
, *sym2
;
1454 register int values_printed
= 0;
1458 fprintf_filtered (stream
, "No symbol table info available.\n");
1462 b
= SYMBOL_BLOCK_VALUE (func
);
1463 nsyms
= BLOCK_NSYMS (b
);
1465 for (i
= 0; i
< nsyms
; i
++)
1467 sym
= BLOCK_SYM (b
, i
);
1468 switch (SYMBOL_CLASS (sym
))
1474 case LOC_REGPARM_ADDR
:
1475 case LOC_BASEREG_ARG
:
1477 fputs_filtered (SYMBOL_SOURCE_NAME (sym
), stream
);
1478 fputs_filtered (" = ", stream
);
1480 /* We have to look up the symbol because arguments can have
1481 two entries (one a parameter, one a local) and the one we
1482 want is the local, which lookup_symbol will find for us.
1483 This includes gcc1 (not gcc2) on the sparc when passing a
1484 small structure and gcc2 when the argument type is float
1485 and it is passed as a double and converted to float by
1486 the prologue (in the latter case the type of the LOC_ARG
1487 symbol is double and the type of the LOC_LOCAL symbol is
1488 float). There are also LOC_ARG/LOC_REGISTER pairs which
1489 are not combined in symbol-reading. */
1491 sym2
= lookup_symbol (SYMBOL_NAME (sym
),
1492 b
, VAR_NAMESPACE
, (int *) NULL
, (struct symtab
**) NULL
);
1493 print_variable_value (sym2
, fi
, stream
);
1494 fprintf_filtered (stream
, "\n");
1498 /* Don't worry about things which aren't arguments. */
1503 if (!values_printed
)
1505 fprintf_filtered (stream
, "No arguments.\n");
1510 args_info (char *ignore
, int from_tty
)
1512 if (!selected_frame
)
1513 error ("No frame selected.");
1514 print_frame_arg_vars (selected_frame
, gdb_stdout
);
1519 args_plus_locals_info (char *ignore
, int from_tty
)
1521 args_info (ignore
, from_tty
);
1522 locals_info (ignore
, from_tty
);
1526 /* Select frame FI, and note that its stack level is LEVEL.
1527 LEVEL may be -1 if an actual level number is not known. */
1530 select_frame (struct frame_info
*fi
, int level
)
1532 register struct symtab
*s
;
1534 selected_frame
= fi
;
1535 selected_frame_level
= level
;
1536 if (selected_frame_level_changed_hook
)
1537 selected_frame_level_changed_hook (level
);
1539 /* Ensure that symbols for this frame are read in. Also, determine the
1540 source language of this frame, and switch to it if desired. */
1543 s
= find_pc_symtab (fi
->pc
);
1545 && s
->language
!= current_language
->la_language
1546 && s
->language
!= language_unknown
1547 && language_mode
== language_mode_auto
)
1549 set_language (s
->language
);
1551 /* elz: this if here fixes the problem with the pc not being displayed
1552 in the tui asm layout, with no debug symbols. The value of s
1553 would be 0 here, and select_source_symtab would abort the
1554 command by calling the 'error' function */
1557 TUIDO (((TuiOpaqueFuncPtr
) tui_vSelectSourceSymtab
, s
));
1563 /* Select frame FI, noting that its stack level is LEVEL. Also print
1564 the stack frame and show the source if this is the tui version. */
1566 select_and_print_frame (struct frame_info
*fi
, int level
)
1568 select_frame (fi
, level
);
1571 print_stack_frame (fi
, level
, 1);
1572 TUIDO (((TuiOpaqueFuncPtr
) tui_vCheckDataValues
, fi
));
1577 /* Select frame FI, noting that its stack level is LEVEL. Be silent if
1581 select_and_maybe_print_frame (struct frame_info
*fi
, int level
)
1584 select_frame (fi
, level
);
1586 select_and_print_frame (fi
, level
);
1591 /* Store the selected frame and its level into *FRAMEP and *LEVELP.
1592 If there is no selected frame, *FRAMEP is set to NULL. */
1595 record_selected_frame (CORE_ADDR
*frameaddrp
, int *levelp
)
1597 *frameaddrp
= selected_frame
? selected_frame
->frame
: 0;
1598 *levelp
= selected_frame_level
;
1601 /* Return the symbol-block in which the selected frame is executing.
1602 Can return zero under various legitimate circumstances. */
1605 get_selected_block (void)
1607 if (!target_has_stack
)
1610 if (!selected_frame
)
1611 return get_current_block ();
1612 return get_frame_block (selected_frame
);
1615 /* Find a frame a certain number of levels away from FRAME.
1616 LEVEL_OFFSET_PTR points to an int containing the number of levels.
1617 Positive means go to earlier frames (up); negative, the reverse.
1618 The int that contains the number of levels is counted toward
1619 zero as the frames for those levels are found.
1620 If the top or bottom frame is reached, that frame is returned,
1621 but the final value of *LEVEL_OFFSET_PTR is nonzero and indicates
1622 how much farther the original request asked to go. */
1625 find_relative_frame (register struct frame_info
*frame
,
1626 register int *level_offset_ptr
)
1628 register struct frame_info
*prev
;
1629 register struct frame_info
*frame1
;
1631 /* Going up is simple: just do get_prev_frame enough times
1632 or until initial frame is reached. */
1633 while (*level_offset_ptr
> 0)
1635 prev
= get_prev_frame (frame
);
1638 (*level_offset_ptr
)--;
1641 /* Going down is just as simple. */
1642 if (*level_offset_ptr
< 0)
1644 while (*level_offset_ptr
< 0)
1646 frame1
= get_next_frame (frame
);
1650 (*level_offset_ptr
)++;
1656 /* The "select_frame" command. With no arg, NOP.
1657 With arg LEVEL_EXP, select the frame at level LEVEL if it is a
1658 valid level. Otherwise, treat level_exp as an address expression
1659 and select it. See parse_frame_specification for more info on proper
1660 frame expressions. */
1665 select_frame_command_wrapper (char *level_exp
, int from_tty
)
1667 select_frame_command (level_exp
, from_tty
);
1671 select_frame_command (char *level_exp
, int from_tty
)
1673 register struct frame_info
*frame
, *frame1
;
1674 unsigned int level
= 0;
1676 if (!target_has_stack
)
1677 error ("No stack.");
1679 frame
= parse_frame_specification (level_exp
);
1681 /* Try to figure out what level this frame is. But if there is
1682 no current stack, don't error out -- let the user set one. */
1684 if (get_current_frame ())
1686 for (frame1
= get_prev_frame (0);
1687 frame1
&& frame1
!= frame
;
1688 frame1
= get_prev_frame (frame1
))
1695 select_frame (frame
, level
);
1698 /* The "frame" command. With no arg, print selected frame briefly.
1699 With arg, behaves like select_frame and then prints the selected
1703 frame_command (char *level_exp
, int from_tty
)
1705 select_frame_command (level_exp
, from_tty
);
1706 show_and_print_stack_frame (selected_frame
, selected_frame_level
, 1);
1709 /* The XDB Compatibility command to print the current frame. */
1712 current_frame_command (char *level_exp
, int from_tty
)
1714 if (target_has_stack
== 0 || selected_frame
== 0)
1715 error ("No stack.");
1716 print_only_stack_frame (selected_frame
, selected_frame_level
, 1);
1719 /* Select the frame up one or COUNT stack levels
1720 from the previously selected frame, and print it briefly. */
1724 up_silently_base (char *count_exp
)
1726 register struct frame_info
*fi
;
1727 int count
= 1, count1
;
1729 count
= parse_and_eval_long (count_exp
);
1732 if (target_has_stack
== 0 || selected_frame
== 0)
1733 error ("No stack.");
1735 fi
= find_relative_frame (selected_frame
, &count1
);
1736 if (count1
!= 0 && count_exp
== 0)
1737 error ("Initial frame selected; you cannot go up.");
1738 select_frame (fi
, selected_frame_level
+ count
- count1
);
1742 up_silently_command (char *count_exp
, int from_tty
)
1744 up_silently_base (count_exp
);
1746 print_stack_frame (selected_frame
, selected_frame_level
, 1);
1750 up_command (char *count_exp
, int from_tty
)
1752 up_silently_base (count_exp
);
1753 show_and_print_stack_frame (selected_frame
, selected_frame_level
, 1);
1756 /* Select the frame down one or COUNT stack levels
1757 from the previously selected frame, and print it briefly. */
1761 down_silently_base (char *count_exp
)
1763 register struct frame_info
*frame
;
1764 int count
= -1, count1
;
1766 count
= -parse_and_eval_long (count_exp
);
1769 if (target_has_stack
== 0 || selected_frame
== 0)
1770 error ("No stack.");
1772 frame
= find_relative_frame (selected_frame
, &count1
);
1773 if (count1
!= 0 && count_exp
== 0)
1776 /* We only do this if count_exp is not specified. That way "down"
1777 means to really go down (and let me know if that is
1778 impossible), but "down 9999" can be used to mean go all the way
1779 down without getting an error. */
1781 error ("Bottom (i.e., innermost) frame selected; you cannot go down.");
1784 select_frame (frame
, selected_frame_level
+ count
- count1
);
1789 down_silently_command (char *count_exp
, int from_tty
)
1791 down_silently_base (count_exp
);
1793 print_stack_frame (selected_frame
, selected_frame_level
, 1);
1797 down_command (char *count_exp
, int from_tty
)
1799 down_silently_base (count_exp
);
1800 show_and_print_stack_frame (selected_frame
, selected_frame_level
, 1);
1805 return_command_wrapper (char *retval_exp
, int from_tty
)
1807 return_command (retval_exp
, from_tty
);
1811 return_command (char *retval_exp
, int from_tty
)
1813 struct symbol
*thisfun
;
1814 CORE_ADDR selected_frame_addr
;
1815 CORE_ADDR selected_frame_pc
;
1816 struct frame_info
*frame
;
1817 value_ptr return_value
= NULL
;
1819 if (selected_frame
== NULL
)
1820 error ("No selected frame.");
1821 thisfun
= get_frame_function (selected_frame
);
1822 selected_frame_addr
= FRAME_FP (selected_frame
);
1823 selected_frame_pc
= selected_frame
->pc
;
1825 /* Compute the return value (if any -- possibly getting errors here). */
1829 struct type
*return_type
= NULL
;
1831 return_value
= parse_and_eval (retval_exp
);
1833 /* Cast return value to the return type of the function. */
1834 if (thisfun
!= NULL
)
1835 return_type
= TYPE_TARGET_TYPE (SYMBOL_TYPE (thisfun
));
1836 if (return_type
== NULL
)
1837 return_type
= builtin_type_int
;
1838 return_value
= value_cast (return_type
, return_value
);
1840 /* Make sure we have fully evaluated it, since
1841 it might live in the stack frame we're about to pop. */
1842 if (VALUE_LAZY (return_value
))
1843 value_fetch_lazy (return_value
);
1846 /* If interactive, require confirmation. */
1852 if (!query ("Make %s return now? ", SYMBOL_SOURCE_NAME (thisfun
)))
1854 error ("Not confirmed.");
1858 else if (!query ("Make selected stack frame return now? "))
1859 error ("Not confirmed.");
1862 /* Do the real work. Pop until the specified frame is current. We
1863 use this method because the selected_frame is not valid after
1864 a POP_FRAME. The pc comparison makes this work even if the
1865 selected frame shares its fp with another frame. */
1867 while (selected_frame_addr
!= (frame
= get_current_frame ())->frame
1868 || selected_frame_pc
!= frame
->pc
)
1871 /* Then pop that frame. */
1875 /* Compute the return value (if any) and store in the place
1876 for return values. */
1879 set_return_value (return_value
);
1881 /* If we are at the end of a call dummy now, pop the dummy frame too. */
1883 if (CALL_DUMMY_HAS_COMPLETED (read_pc(), read_sp (),
1884 FRAME_FP (get_current_frame ())))
1887 /* If interactive, print the frame that is now current. */
1890 frame_command ("0", 1);
1892 select_frame_command ("0", 0);
1895 /* Sets the scope to input function name, provided that the
1896 function is within the current stack frame */
1898 struct function_bounds
1900 CORE_ADDR low
, high
;
1903 static void func_command (char *arg
, int from_tty
);
1905 func_command (char *arg
, int from_tty
)
1907 struct frame_info
*fp
;
1909 struct symtabs_and_lines sals
;
1912 struct function_bounds
*func_bounds
= (struct function_bounds
*) NULL
;
1914 if (arg
!= (char *) NULL
)
1917 fp
= parse_frame_specification ("0");
1918 sals
= decode_line_spec (arg
, 1);
1919 func_bounds
= (struct function_bounds
*) xmalloc (
1920 sizeof (struct function_bounds
) * sals
.nelts
);
1921 for (i
= 0; (i
< sals
.nelts
&& !found
); i
++)
1923 if (sals
.sals
[i
].pc
== (CORE_ADDR
) 0 ||
1924 find_pc_partial_function (sals
.sals
[i
].pc
,
1926 &func_bounds
[i
].low
,
1927 &func_bounds
[i
].high
) == 0)
1929 func_bounds
[i
].low
=
1930 func_bounds
[i
].high
= (CORE_ADDR
) NULL
;
1936 for (i
= 0; (i
< sals
.nelts
&& !found
); i
++)
1937 found
= (fp
->pc
>= func_bounds
[i
].low
&&
1938 fp
->pc
< func_bounds
[i
].high
);
1942 fp
= find_relative_frame (fp
, &level
);
1945 while (!found
&& level
== 0);
1948 xfree (func_bounds
);
1951 printf_filtered ("'%s' not within current stack frame.\n", arg
);
1952 else if (fp
!= selected_frame
)
1953 select_and_print_frame (fp
, level
);
1956 /* Gets the language of the current frame. */
1959 get_frame_language (void)
1961 register struct symtab
*s
;
1962 enum language flang
; /* The language of the current frame */
1966 s
= find_pc_symtab (selected_frame
->pc
);
1968 flang
= s
->language
;
1970 flang
= language_unknown
;
1973 flang
= language_unknown
;
1979 _initialize_stack (void)
1982 backtrace_limit
= 30;
1985 add_com ("return", class_stack
, return_command
,
1986 "Make selected stack frame return to its caller.\n\
1987 Control remains in the debugger, but when you continue\n\
1988 execution will resume in the frame above the one now selected.\n\
1989 If an argument is given, it is an expression for the value to return.");
1991 add_com ("up", class_stack
, up_command
,
1992 "Select and print stack frame that called this one.\n\
1993 An argument says how many frames up to go.");
1994 add_com ("up-silently", class_support
, up_silently_command
,
1995 "Same as the `up' command, but does not print anything.\n\
1996 This is useful in command scripts.");
1998 add_com ("down", class_stack
, down_command
,
1999 "Select and print stack frame called by this one.\n\
2000 An argument says how many frames down to go.");
2001 add_com_alias ("do", "down", class_stack
, 1);
2002 add_com_alias ("dow", "down", class_stack
, 1);
2003 add_com ("down-silently", class_support
, down_silently_command
,
2004 "Same as the `down' command, but does not print anything.\n\
2005 This is useful in command scripts.");
2007 add_com ("frame", class_stack
, frame_command
,
2008 "Select and print a stack frame.\n\
2009 With no argument, print the selected stack frame. (See also \"info frame\").\n\
2010 An argument specifies the frame to select.\n\
2011 It can be a stack frame number or the address of the frame.\n\
2012 With argument, nothing is printed if input is coming from\n\
2013 a command file or a user-defined command.");
2015 add_com_alias ("f", "frame", class_stack
, 1);
2019 add_com ("L", class_stack
, current_frame_command
,
2020 "Print the current stack frame.\n");
2021 add_com_alias ("V", "frame", class_stack
, 1);
2023 add_com ("select-frame", class_stack
, select_frame_command
,
2024 "Select a stack frame without printing anything.\n\
2025 An argument specifies the frame to select.\n\
2026 It can be a stack frame number or the address of the frame.\n");
2028 add_com ("backtrace", class_stack
, backtrace_command
,
2029 "Print backtrace of all stack frames, or innermost COUNT frames.\n\
2030 With a negative argument, print outermost -COUNT frames.\n\
2031 Use of the 'full' qualifier also prints the values of the local variables.\n");
2032 add_com_alias ("bt", "backtrace", class_stack
, 0);
2035 add_com_alias ("t", "backtrace", class_stack
, 0);
2036 add_com ("T", class_stack
, backtrace_full_command
,
2037 "Print backtrace of all stack frames, or innermost COUNT frames \n\
2038 and the values of the local variables.\n\
2039 With a negative argument, print outermost -COUNT frames.\n\
2040 Usage: T <count>\n");
2043 add_com_alias ("where", "backtrace", class_alias
, 0);
2044 add_info ("stack", backtrace_command
,
2045 "Backtrace of the stack, or innermost COUNT frames.");
2046 add_info_alias ("s", "stack", 1);
2047 add_info ("frame", frame_info
,
2048 "All about selected stack frame, or frame at ADDR.");
2049 add_info_alias ("f", "frame", 1);
2050 add_info ("locals", locals_info
,
2051 "Local variables of current stack frame.");
2052 add_info ("args", args_info
,
2053 "Argument variables of current stack frame.");
2055 add_com ("l", class_info
, args_plus_locals_info
,
2056 "Argument and local variables of current stack frame.");
2059 add_com ("func", class_stack
, func_command
,
2060 "Select the stack frame that contains <func>.\nUsage: func <name>\n");
2062 add_info ("catch", catch_info
,
2063 "Exceptions that can be caught in the current stack frame.");
2066 add_cmd ("backtrace-limit", class_stack
, set_backtrace_limit_command
,
2067 "Specify maximum number of frames for \"backtrace\" to print by default.",
2069 add_info ("backtrace-limit", backtrace_limit_info
,
2070 "The maximum number of frames for \"backtrace\" to print by default.");