1 /* Print and select stack frames for GDB, the GNU debugger.
2 Copyright 1986, 1987, 1989, 1991, 1992, 1993, 1994, 1995, 1996,
3 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 ();
629 #ifdef PC_LOAD_SEGMENT
630 /* If we couldn't print out function name but if can figure out what
631 load segment this pc value is from, at least print out some info
632 about its load segment. */
635 annotate_frame_where ();
637 ui_out_wrap_hint (uiout
, " ");
638 ui_out_text (uiout
, " from ");
639 ui_out_field_string (uiout
, "from", PC_LOAD_SEGMENT (fi
->pc
));
642 printf_filtered (" from %s", PC_LOAD_SEGMENT (fi
->pc
));
645 #endif /* PC_LOAD_SEGMENT */
648 if (!funname
|| (!sal
.symtab
|| !sal
.symtab
->filename
))
650 char *lib
= PC_SOLIB (fi
->pc
);
653 annotate_frame_where ();
655 ui_out_wrap_hint (uiout
, " ");
656 ui_out_text (uiout
, " from ");
657 ui_out_field_string (uiout
, "from", lib
);
660 printf_filtered (" from %s", lib
);
664 #endif /* PC_SOLIB */
667 /* do_cleanups will call ui_out_list_end() for us. */
668 do_cleanups (list_chain
);
669 ui_out_text (uiout
, "\n");
670 do_cleanups (old_chain
);
672 printf_filtered ("\n");
679 stack_publish_stopped_with_no_frame (void)
681 TUIDO (((TuiOpaqueFuncPtr
) tuiUpdateOnEnd
));
687 /* Show or print the frame info. If this is the tui, it will be shown in
688 the source display */
690 print_frame_info (struct frame_info
*fi
, register int level
, int source
,
694 print_frame_info_base (fi
, level
, source
, args
);
697 if (fi
&& (frame_in_dummy (fi
) || fi
->signal_handler_caller
))
698 print_frame_info_base (fi
, level
, source
, args
);
701 TUIDO (((TuiOpaqueFuncPtr
) tui_vShowFrameInfo
, fi
));
706 /* Show the frame info. If this is the tui, it will be shown in
707 the source display otherwise, nothing is done */
709 show_stack_frame (struct frame_info
*fi
)
711 TUIDO (((TuiOpaqueFuncPtr
) tui_vShowFrameInfo
, fi
));
715 /* Read a frame specification in whatever the appropriate format is.
716 Call error() if the specification is in any way invalid (i.e.
717 this function never returns NULL). */
720 parse_frame_specification (char *frame_exp
)
724 CORE_ADDR args
[MAXARGS
];
728 char *addr_string
, *p
;
729 struct cleanup
*tmp_cleanup
;
731 while (*frame_exp
== ' ')
736 if (numargs
> MAXARGS
)
737 error ("Too many args in frame specification");
738 /* Parse an argument. */
739 for (p
= frame_exp
; *p
&& *p
!= ' '; p
++)
741 addr_string
= savestring (frame_exp
, p
- frame_exp
);
744 tmp_cleanup
= make_cleanup (xfree
, addr_string
);
745 args
[numargs
++] = parse_and_eval_address (addr_string
);
746 do_cleanups (tmp_cleanup
);
749 /* Skip spaces, move to possible next arg. */
759 if (selected_frame
== NULL
)
760 error ("No selected frame.");
761 return selected_frame
;
766 struct frame_info
*fid
=
767 find_relative_frame (get_current_frame (), &level
);
768 struct frame_info
*tfid
;
771 /* find_relative_frame was successful */
774 /* If SETUP_ARBITRARY_FRAME is defined, then frame specifications
775 take at least 2 addresses. It is important to detect this case
776 here so that "frame 100" does not give a confusing error message
777 like "frame specification requires two addresses". This of course
778 does not solve the "frame 100" problem for machines on which
779 a frame specification can be made with one address. To solve
780 that, we need a new syntax for a specifying a frame by address.
781 I think the cleanest syntax is $frame(0x45) ($frame(0x23,0x45) for
782 two args, etc.), but people might think that is too much typing,
783 so I guess *0x23,0x45 would be a possible alternative (commas
784 really should be used instead of spaces to delimit; using spaces
785 normally works in an expression). */
786 #ifdef SETUP_ARBITRARY_FRAME
787 error ("No frame %d", args
[0]);
790 /* If (s)he specifies the frame with an address, he deserves what
791 (s)he gets. Still, give the highest one that matches. */
793 for (fid
= get_current_frame ();
794 fid
&& fid
->frame
!= args
[0];
795 fid
= get_prev_frame (fid
))
799 while ((tfid
= get_prev_frame (fid
)) &&
800 (tfid
->frame
== args
[0]))
803 /* We couldn't identify the frame as an existing frame, but
804 perhaps we can create one with a single argument. */
808 #ifdef SETUP_ARBITRARY_FRAME
809 return SETUP_ARBITRARY_FRAME (numargs
, args
);
811 /* Usual case. Do it here rather than have everyone supply
812 a SETUP_ARBITRARY_FRAME that does this. */
814 return create_new_frame (args
[0], 0);
815 error ("Too many args in frame specification");
822 /* FRAME_ARGS_ADDRESS_CORRECT is just like FRAME_ARGS_ADDRESS except
823 that if it is unsure about the answer, it returns 0
824 instead of guessing (this happens on the VAX and i960, for example).
826 On most machines, we never have to guess about the args address,
827 so FRAME_ARGS_ADDRESS{,_CORRECT} are the same. */
828 #if !defined (FRAME_ARGS_ADDRESS_CORRECT)
829 #define FRAME_ARGS_ADDRESS_CORRECT FRAME_ARGS_ADDRESS
832 /* Print verbosely the selected frame or the frame at address ADDR.
833 This means absolutely all information in the frame is printed. */
836 frame_info (char *addr_exp
, int from_tty
)
838 struct frame_info
*fi
;
839 struct symtab_and_line sal
;
842 struct frame_info
*calling_frame_info
;
843 int i
, count
, numregs
;
845 enum language funlang
= language_unknown
;
847 if (!target_has_stack
)
850 fi
= parse_frame_specification (addr_exp
);
852 error ("Invalid frame specified.");
854 sal
= find_pc_line (fi
->pc
,
856 && !fi
->next
->signal_handler_caller
857 && !frame_in_dummy (fi
->next
));
858 func
= get_frame_function (fi
);
859 s
= find_pc_symtab (fi
->pc
);
862 /* I'd like to use SYMBOL_SOURCE_NAME() here, to display
863 * the demangled name that we already have stored in
864 * the symbol table, but we stored a version with
865 * DMGL_PARAMS turned on, and here we don't want
866 * to display parameters. So call the demangler again,
867 * with DMGL_ANSI only. RT
868 * (Yes, I know that printf_symbol_filtered() will
869 * again try to demangle the name on the fly, but
870 * the issue is that if cplus_demangle() fails here,
871 * it'll fail there too. So we want to catch the failure
872 * ("demangled==NULL" case below) here, while we still
873 * have our hands on the function symbol.)
876 funname
= SYMBOL_NAME (func
);
877 funlang
= SYMBOL_LANGUAGE (func
);
878 if (funlang
== language_cplus
)
880 demangled
= cplus_demangle (funname
, DMGL_ANSI
);
881 /* If the demangler fails, try the demangled name
882 * from the symbol table. This'll have parameters,
883 * but that's preferable to diplaying a mangled name.
885 if (demangled
== NULL
)
886 funname
= SYMBOL_SOURCE_NAME (func
);
891 register struct minimal_symbol
*msymbol
= lookup_minimal_symbol_by_pc (fi
->pc
);
894 funname
= SYMBOL_NAME (msymbol
);
895 funlang
= SYMBOL_LANGUAGE (msymbol
);
898 calling_frame_info
= get_prev_frame (fi
);
900 if (!addr_exp
&& selected_frame_level
>= 0)
902 printf_filtered ("Stack level %d, frame at ", selected_frame_level
);
903 print_address_numeric (fi
->frame
, 1, gdb_stdout
);
904 printf_filtered (":\n");
908 printf_filtered ("Stack frame at ");
909 print_address_numeric (fi
->frame
, 1, gdb_stdout
);
910 printf_filtered (":\n");
912 printf_filtered (" %s = ", REGISTER_NAME (PC_REGNUM
));
913 print_address_numeric (fi
->pc
, 1, gdb_stdout
);
918 printf_filtered (" in ");
919 fprintf_symbol_filtered (gdb_stdout
, funname
, funlang
,
920 DMGL_ANSI
| DMGL_PARAMS
);
924 printf_filtered (" (%s:%d)", sal
.symtab
->filename
, sal
.line
);
925 puts_filtered ("; ");
927 printf_filtered ("saved %s ", REGISTER_NAME (PC_REGNUM
));
928 print_address_numeric (FRAME_SAVED_PC (fi
), 1, gdb_stdout
);
929 printf_filtered ("\n");
933 frameless
= FRAMELESS_FUNCTION_INVOCATION (fi
);
935 printf_filtered (" (FRAMELESS),");
938 if (calling_frame_info
)
940 printf_filtered (" called by frame at ");
941 print_address_numeric (calling_frame_info
->frame
, 1, gdb_stdout
);
943 if (fi
->next
&& calling_frame_info
)
948 printf_filtered (" caller of frame at ");
949 print_address_numeric (fi
->next
->frame
, 1, gdb_stdout
);
951 if (fi
->next
|| calling_frame_info
)
952 puts_filtered ("\n");
954 printf_filtered (" source language %s.\n", language_str (s
->language
));
956 #ifdef PRINT_EXTRA_FRAME_INFO
957 PRINT_EXTRA_FRAME_INFO (fi
);
961 /* Address of the argument list for this frame, or 0. */
962 CORE_ADDR arg_list
= FRAME_ARGS_ADDRESS_CORRECT (fi
);
963 /* Number of args for this frame, or -1 if unknown. */
967 printf_filtered (" Arglist at unknown address.\n");
970 printf_filtered (" Arglist at ");
971 print_address_numeric (arg_list
, 1, gdb_stdout
);
972 printf_filtered (",");
974 numargs
= FRAME_NUM_ARGS (fi
);
976 puts_filtered (" args: ");
977 else if (numargs
== 0)
978 puts_filtered (" no args.");
979 else if (numargs
== 1)
980 puts_filtered (" 1 arg: ");
982 printf_filtered (" %d args: ", numargs
);
983 print_frame_args (func
, fi
, numargs
, gdb_stdout
);
984 puts_filtered ("\n");
988 /* Address of the local variables for this frame, or 0. */
989 CORE_ADDR arg_list
= FRAME_LOCALS_ADDRESS (fi
);
992 printf_filtered (" Locals at unknown address,");
995 printf_filtered (" Locals at ");
996 print_address_numeric (arg_list
, 1, gdb_stdout
);
997 printf_filtered (",");
1001 FRAME_INIT_SAVED_REGS (fi
);
1002 if (fi
->saved_regs
!= NULL
)
1004 /* The sp is special; what's returned isn't the save address, but
1005 actually the value of the previous frame's sp. */
1006 printf_filtered (" Previous frame's sp is ");
1007 print_address_numeric (fi
->saved_regs
[SP_REGNUM
], 1, gdb_stdout
);
1008 printf_filtered ("\n");
1010 numregs
= ARCH_NUM_REGS
;
1011 for (i
= 0; i
< numregs
; i
++)
1012 if (fi
->saved_regs
[i
] && i
!= SP_REGNUM
)
1015 puts_filtered (" Saved registers:\n ");
1017 puts_filtered (",");
1019 printf_filtered (" %s at ", REGISTER_NAME (i
));
1020 print_address_numeric (fi
->saved_regs
[i
], 1, gdb_stdout
);
1024 puts_filtered ("\n");
1028 /* We could get some information about saved registers by
1029 calling get_saved_register on each register. Which info goes
1030 with which frame is necessarily lost, however, and I suspect
1031 that the users don't care whether they get the info. */
1032 puts_filtered ("\n");
1037 /* Set a limit on the number of frames printed by default in a
1040 static int backtrace_limit
;
1043 set_backtrace_limit_command (char *count_exp
, int from_tty
)
1045 int count
= parse_and_eval_long (count_exp
);
1048 error ("Negative argument not meaningful as backtrace limit.");
1050 backtrace_limit
= count
;
1054 backtrace_limit_info (char *arg
, int from_tty
)
1057 error ("\"Info backtrace-limit\" takes no arguments.");
1059 printf_unfiltered ("Backtrace limit: %d.\n", backtrace_limit
);
1063 /* Print briefly all stack frames or just the innermost COUNT frames. */
1065 static void backtrace_command_1 (char *count_exp
, int show_locals
,
1068 backtrace_command_1 (char *count_exp
, int show_locals
, int from_tty
)
1070 struct frame_info
*fi
;
1073 register struct frame_info
*trailing
;
1074 register int trailing_level
;
1076 if (!target_has_stack
)
1077 error ("No stack.");
1079 /* The following code must do two things. First, it must
1080 set the variable TRAILING to the frame from which we should start
1081 printing. Second, it must set the variable count to the number
1082 of frames which we should print, or -1 if all of them. */
1083 trailing
= get_current_frame ();
1085 /* The target can be in a state where there is no valid frames
1086 (e.g., just connected). */
1087 if (trailing
== NULL
)
1088 error ("No stack.");
1093 count
= parse_and_eval_long (count_exp
);
1096 struct frame_info
*current
;
1101 while (current
&& count
--)
1104 current
= get_prev_frame (current
);
1107 /* Will stop when CURRENT reaches the top of the stack. TRAILING
1108 will be COUNT below it. */
1112 trailing
= get_prev_frame (trailing
);
1113 current
= get_prev_frame (current
);
1125 struct partial_symtab
*ps
;
1127 /* Read in symbols for all of the frames. Need to do this in
1128 a separate pass so that "Reading in symbols for xxx" messages
1129 don't screw up the appearance of the backtrace. Also
1130 if people have strong opinions against reading symbols for
1131 backtrace this may have to be an option. */
1135 fi
= get_prev_frame (fi
))
1138 ps
= find_pc_psymtab (fi
->pc
);
1140 PSYMTAB_TO_SYMTAB (ps
); /* Force syms to come in */
1144 for (i
= 0, fi
= trailing
;
1146 i
++, fi
= get_prev_frame (fi
))
1150 /* Don't use print_stack_frame; if an error() occurs it probably
1151 means further attempts to backtrace would fail (on the other
1152 hand, perhaps the code does or could be fixed to make sure
1153 the frame->prev field gets set to NULL in that case). */
1154 print_frame_info_base (fi
, trailing_level
+ i
, 0, 1);
1156 print_frame_local_vars (fi
, 1, gdb_stdout
);
1159 /* If we've stopped before the end, mention that. */
1161 printf_filtered ("(More stack frames follow...)\n");
1165 backtrace_command (char *arg
, int from_tty
)
1167 struct cleanup
*old_chain
= (struct cleanup
*) NULL
;
1168 char **argv
= (char **) NULL
;
1169 int argIndicatingFullTrace
= (-1), totArgLen
= 0, argc
= 0;
1172 if (arg
!= (char *) NULL
)
1176 argv
= buildargv (arg
);
1177 old_chain
= make_cleanup_freeargv (argv
);
1179 for (i
= 0; (argv
[i
] != (char *) NULL
); i
++)
1183 for (j
= 0; (j
< strlen (argv
[i
])); j
++)
1184 argv
[i
][j
] = tolower (argv
[i
][j
]);
1186 if (argIndicatingFullTrace
< 0 && subset_compare (argv
[i
], "full"))
1187 argIndicatingFullTrace
= argc
;
1191 totArgLen
+= strlen (argv
[i
]);
1195 if (argIndicatingFullTrace
>= 0)
1199 argPtr
= (char *) xmalloc (totArgLen
+ 1);
1204 memset (argPtr
, 0, totArgLen
+ 1);
1205 for (i
= 0; (i
< (argc
+ 1)); i
++)
1207 if (i
!= argIndicatingFullTrace
)
1209 strcat (argPtr
, argv
[i
]);
1210 strcat (argPtr
, " ");
1216 argPtr
= (char *) NULL
;
1220 backtrace_command_1 (argPtr
, (argIndicatingFullTrace
>= 0), from_tty
);
1222 if (argIndicatingFullTrace
>= 0 && totArgLen
> 0)
1226 do_cleanups (old_chain
);
1229 static void backtrace_full_command (char *arg
, int from_tty
);
1231 backtrace_full_command (char *arg
, int from_tty
)
1233 backtrace_command_1 (arg
, 1, from_tty
);
1237 /* Print the local variables of a block B active in FRAME.
1238 Return 1 if any variables were printed; 0 otherwise. */
1241 print_block_frame_locals (struct block
*b
, register struct frame_info
*fi
,
1242 int num_tabs
, register struct ui_file
*stream
)
1246 register struct symbol
*sym
;
1247 register int values_printed
= 0;
1249 nsyms
= BLOCK_NSYMS (b
);
1251 for (i
= 0; i
< nsyms
; i
++)
1253 sym
= BLOCK_SYM (b
, i
);
1254 switch (SYMBOL_CLASS (sym
))
1261 for (j
= 0; j
< num_tabs
; j
++)
1262 fputs_filtered ("\t", stream
);
1263 fputs_filtered (SYMBOL_SOURCE_NAME (sym
), stream
);
1264 fputs_filtered (" = ", stream
);
1265 print_variable_value (sym
, fi
, stream
);
1266 fprintf_filtered (stream
, "\n");
1270 /* Ignore symbols which are not locals. */
1274 return values_printed
;
1277 /* Same, but print labels. */
1280 print_block_frame_labels (struct block
*b
, int *have_default
,
1281 register struct ui_file
*stream
)
1285 register struct symbol
*sym
;
1286 register int values_printed
= 0;
1288 nsyms
= BLOCK_NSYMS (b
);
1290 for (i
= 0; i
< nsyms
; i
++)
1292 sym
= BLOCK_SYM (b
, i
);
1293 if (STREQ (SYMBOL_NAME (sym
), "default"))
1299 if (SYMBOL_CLASS (sym
) == LOC_LABEL
)
1301 struct symtab_and_line sal
;
1302 sal
= find_pc_line (SYMBOL_VALUE_ADDRESS (sym
), 0);
1304 fputs_filtered (SYMBOL_SOURCE_NAME (sym
), stream
);
1307 fprintf_filtered (stream
, " ");
1308 print_address_numeric (SYMBOL_VALUE_ADDRESS (sym
), 1, stream
);
1310 fprintf_filtered (stream
, " in file %s, line %d\n",
1311 sal
.symtab
->filename
, sal
.line
);
1314 return values_printed
;
1317 /* Print on STREAM all the local variables in frame FRAME,
1318 including all the blocks active in that frame
1321 Returns 1 if the job was done,
1322 or 0 if nothing was printed because we have no info
1323 on the function running in FRAME. */
1326 print_frame_local_vars (register struct frame_info
*fi
, register int num_tabs
,
1327 register struct ui_file
*stream
)
1329 register struct block
*block
= get_frame_block (fi
);
1330 register int values_printed
= 0;
1334 fprintf_filtered (stream
, "No symbol table info available.\n");
1340 if (print_block_frame_locals (block
, fi
, num_tabs
, stream
))
1342 /* After handling the function's top-level block, stop.
1343 Don't continue to its superblock, the block of
1344 per-file symbols. */
1345 if (BLOCK_FUNCTION (block
))
1347 block
= BLOCK_SUPERBLOCK (block
);
1350 if (!values_printed
)
1352 fprintf_filtered (stream
, "No locals.\n");
1356 /* Same, but print labels. */
1359 print_frame_label_vars (register struct frame_info
*fi
, int this_level_only
,
1360 register struct ui_file
*stream
)
1362 register struct blockvector
*bl
;
1363 register struct block
*block
= get_frame_block (fi
);
1364 register int values_printed
= 0;
1365 int index
, have_default
= 0;
1366 char *blocks_printed
;
1367 CORE_ADDR pc
= fi
->pc
;
1371 fprintf_filtered (stream
, "No symbol table info available.\n");
1375 bl
= blockvector_for_pc (BLOCK_END (block
) - 4, &index
);
1376 blocks_printed
= (char *) alloca (BLOCKVECTOR_NBLOCKS (bl
) * sizeof (char));
1377 memset (blocks_printed
, 0, BLOCKVECTOR_NBLOCKS (bl
) * sizeof (char));
1381 CORE_ADDR end
= BLOCK_END (block
) - 4;
1384 if (bl
!= blockvector_for_pc (end
, &index
))
1385 error ("blockvector blotch");
1386 if (BLOCKVECTOR_BLOCK (bl
, index
) != block
)
1387 error ("blockvector botch");
1388 last_index
= BLOCKVECTOR_NBLOCKS (bl
);
1391 /* Don't print out blocks that have gone by. */
1392 while (index
< last_index
1393 && BLOCK_END (BLOCKVECTOR_BLOCK (bl
, index
)) < pc
)
1396 while (index
< last_index
1397 && BLOCK_END (BLOCKVECTOR_BLOCK (bl
, index
)) < end
)
1399 if (blocks_printed
[index
] == 0)
1401 if (print_block_frame_labels (BLOCKVECTOR_BLOCK (bl
, index
), &have_default
, stream
))
1403 blocks_printed
[index
] = 1;
1409 if (values_printed
&& this_level_only
)
1412 /* After handling the function's top-level block, stop.
1413 Don't continue to its superblock, the block of
1414 per-file symbols. */
1415 if (BLOCK_FUNCTION (block
))
1417 block
= BLOCK_SUPERBLOCK (block
);
1420 if (!values_printed
&& !this_level_only
)
1422 fprintf_filtered (stream
, "No catches.\n");
1428 locals_info (char *args
, int from_tty
)
1430 if (!selected_frame
)
1431 error ("No frame selected.");
1432 print_frame_local_vars (selected_frame
, 0, gdb_stdout
);
1436 catch_info (char *ignore
, int from_tty
)
1438 struct symtab_and_line
*sal
;
1440 /* Check for target support for exception handling */
1441 sal
= target_enable_exception_callback (EX_EVENT_CATCH
, 1);
1444 /* Currently not handling this */
1445 /* Ideally, here we should interact with the C++ runtime
1446 system to find the list of active handlers, etc. */
1447 fprintf_filtered (gdb_stdout
, "Info catch not supported with this target/compiler combination.\n");
1449 if (!selected_frame
)
1450 error ("No frame selected.");
1455 /* Assume g++ compiled code -- old v 4.16 behaviour */
1456 if (!selected_frame
)
1457 error ("No frame selected.");
1459 print_frame_label_vars (selected_frame
, 0, gdb_stdout
);
1464 print_frame_arg_vars (register struct frame_info
*fi
,
1465 register struct ui_file
*stream
)
1467 struct symbol
*func
= get_frame_function (fi
);
1468 register struct block
*b
;
1471 register struct symbol
*sym
, *sym2
;
1472 register int values_printed
= 0;
1476 fprintf_filtered (stream
, "No symbol table info available.\n");
1480 b
= SYMBOL_BLOCK_VALUE (func
);
1481 nsyms
= BLOCK_NSYMS (b
);
1483 for (i
= 0; i
< nsyms
; i
++)
1485 sym
= BLOCK_SYM (b
, i
);
1486 switch (SYMBOL_CLASS (sym
))
1492 case LOC_REGPARM_ADDR
:
1493 case LOC_BASEREG_ARG
:
1495 fputs_filtered (SYMBOL_SOURCE_NAME (sym
), stream
);
1496 fputs_filtered (" = ", stream
);
1498 /* We have to look up the symbol because arguments can have
1499 two entries (one a parameter, one a local) and the one we
1500 want is the local, which lookup_symbol will find for us.
1501 This includes gcc1 (not gcc2) on the sparc when passing a
1502 small structure and gcc2 when the argument type is float
1503 and it is passed as a double and converted to float by
1504 the prologue (in the latter case the type of the LOC_ARG
1505 symbol is double and the type of the LOC_LOCAL symbol is
1506 float). There are also LOC_ARG/LOC_REGISTER pairs which
1507 are not combined in symbol-reading. */
1509 sym2
= lookup_symbol (SYMBOL_NAME (sym
),
1510 b
, VAR_NAMESPACE
, (int *) NULL
, (struct symtab
**) NULL
);
1511 print_variable_value (sym2
, fi
, stream
);
1512 fprintf_filtered (stream
, "\n");
1516 /* Don't worry about things which aren't arguments. */
1521 if (!values_printed
)
1523 fprintf_filtered (stream
, "No arguments.\n");
1528 args_info (char *ignore
, int from_tty
)
1530 if (!selected_frame
)
1531 error ("No frame selected.");
1532 print_frame_arg_vars (selected_frame
, gdb_stdout
);
1537 args_plus_locals_info (char *ignore
, int from_tty
)
1539 args_info (ignore
, from_tty
);
1540 locals_info (ignore
, from_tty
);
1544 /* Select frame FI, and note that its stack level is LEVEL.
1545 LEVEL may be -1 if an actual level number is not known. */
1548 select_frame (struct frame_info
*fi
, int level
)
1550 register struct symtab
*s
;
1552 selected_frame
= fi
;
1553 selected_frame_level
= level
;
1554 if (selected_frame_level_changed_hook
)
1555 selected_frame_level_changed_hook (level
);
1557 /* Ensure that symbols for this frame are read in. Also, determine the
1558 source language of this frame, and switch to it if desired. */
1561 s
= find_pc_symtab (fi
->pc
);
1563 && s
->language
!= current_language
->la_language
1564 && s
->language
!= language_unknown
1565 && language_mode
== language_mode_auto
)
1567 set_language (s
->language
);
1569 /* elz: this if here fixes the problem with the pc not being displayed
1570 in the tui asm layout, with no debug symbols. The value of s
1571 would be 0 here, and select_source_symtab would abort the
1572 command by calling the 'error' function */
1575 TUIDO (((TuiOpaqueFuncPtr
) tui_vSelectSourceSymtab
, s
));
1581 /* Select frame FI, noting that its stack level is LEVEL. Also print
1582 the stack frame and show the source if this is the tui version. */
1584 select_and_print_frame (struct frame_info
*fi
, int level
)
1586 select_frame (fi
, level
);
1589 print_stack_frame (fi
, level
, 1);
1590 TUIDO (((TuiOpaqueFuncPtr
) tui_vCheckDataValues
, fi
));
1595 /* Select frame FI, noting that its stack level is LEVEL. Be silent if
1599 select_and_maybe_print_frame (struct frame_info
*fi
, int level
)
1602 select_frame (fi
, level
);
1604 select_and_print_frame (fi
, level
);
1609 /* Store the selected frame and its level into *FRAMEP and *LEVELP.
1610 If there is no selected frame, *FRAMEP is set to NULL. */
1613 record_selected_frame (CORE_ADDR
*frameaddrp
, int *levelp
)
1615 *frameaddrp
= selected_frame
? selected_frame
->frame
: 0;
1616 *levelp
= selected_frame_level
;
1619 /* Return the symbol-block in which the selected frame is executing.
1620 Can return zero under various legitimate circumstances. */
1623 get_selected_block (void)
1625 if (!target_has_stack
)
1628 if (!selected_frame
)
1629 return get_current_block ();
1630 return get_frame_block (selected_frame
);
1633 /* Find a frame a certain number of levels away from FRAME.
1634 LEVEL_OFFSET_PTR points to an int containing the number of levels.
1635 Positive means go to earlier frames (up); negative, the reverse.
1636 The int that contains the number of levels is counted toward
1637 zero as the frames for those levels are found.
1638 If the top or bottom frame is reached, that frame is returned,
1639 but the final value of *LEVEL_OFFSET_PTR is nonzero and indicates
1640 how much farther the original request asked to go. */
1643 find_relative_frame (register struct frame_info
*frame
,
1644 register int *level_offset_ptr
)
1646 register struct frame_info
*prev
;
1647 register struct frame_info
*frame1
;
1649 /* Going up is simple: just do get_prev_frame enough times
1650 or until initial frame is reached. */
1651 while (*level_offset_ptr
> 0)
1653 prev
= get_prev_frame (frame
);
1656 (*level_offset_ptr
)--;
1659 /* Going down is just as simple. */
1660 if (*level_offset_ptr
< 0)
1662 while (*level_offset_ptr
< 0)
1664 frame1
= get_next_frame (frame
);
1668 (*level_offset_ptr
)++;
1674 /* The "select_frame" command. With no arg, NOP.
1675 With arg LEVEL_EXP, select the frame at level LEVEL if it is a
1676 valid level. Otherwise, treat level_exp as an address expression
1677 and select it. See parse_frame_specification for more info on proper
1678 frame expressions. */
1683 select_frame_command_wrapper (char *level_exp
, int from_tty
)
1685 select_frame_command (level_exp
, from_tty
);
1689 select_frame_command (char *level_exp
, int from_tty
)
1691 register struct frame_info
*frame
, *frame1
;
1692 unsigned int level
= 0;
1694 if (!target_has_stack
)
1695 error ("No stack.");
1697 frame
= parse_frame_specification (level_exp
);
1699 /* Try to figure out what level this frame is. But if there is
1700 no current stack, don't error out -- let the user set one. */
1702 if (get_current_frame ())
1704 for (frame1
= get_prev_frame (0);
1705 frame1
&& frame1
!= frame
;
1706 frame1
= get_prev_frame (frame1
))
1713 select_frame (frame
, level
);
1716 /* The "frame" command. With no arg, print selected frame briefly.
1717 With arg, behaves like select_frame and then prints the selected
1721 frame_command (char *level_exp
, int from_tty
)
1723 select_frame_command (level_exp
, from_tty
);
1724 show_and_print_stack_frame (selected_frame
, selected_frame_level
, 1);
1727 /* The XDB Compatibility command to print the current frame. */
1730 current_frame_command (char *level_exp
, int from_tty
)
1732 if (target_has_stack
== 0 || selected_frame
== 0)
1733 error ("No stack.");
1734 print_only_stack_frame (selected_frame
, selected_frame_level
, 1);
1737 /* Select the frame up one or COUNT stack levels
1738 from the previously selected frame, and print it briefly. */
1742 up_silently_base (char *count_exp
)
1744 register struct frame_info
*fi
;
1745 int count
= 1, count1
;
1747 count
= parse_and_eval_long (count_exp
);
1750 if (target_has_stack
== 0 || selected_frame
== 0)
1751 error ("No stack.");
1753 fi
= find_relative_frame (selected_frame
, &count1
);
1754 if (count1
!= 0 && count_exp
== 0)
1755 error ("Initial frame selected; you cannot go up.");
1756 select_frame (fi
, selected_frame_level
+ count
- count1
);
1760 up_silently_command (char *count_exp
, int from_tty
)
1762 up_silently_base (count_exp
);
1764 print_stack_frame (selected_frame
, selected_frame_level
, 1);
1768 up_command (char *count_exp
, int from_tty
)
1770 up_silently_base (count_exp
);
1771 show_and_print_stack_frame (selected_frame
, selected_frame_level
, 1);
1774 /* Select the frame down one or COUNT stack levels
1775 from the previously selected frame, and print it briefly. */
1779 down_silently_base (char *count_exp
)
1781 register struct frame_info
*frame
;
1782 int count
= -1, count1
;
1784 count
= -parse_and_eval_long (count_exp
);
1787 if (target_has_stack
== 0 || selected_frame
== 0)
1788 error ("No stack.");
1790 frame
= find_relative_frame (selected_frame
, &count1
);
1791 if (count1
!= 0 && count_exp
== 0)
1794 /* We only do this if count_exp is not specified. That way "down"
1795 means to really go down (and let me know if that is
1796 impossible), but "down 9999" can be used to mean go all the way
1797 down without getting an error. */
1799 error ("Bottom (i.e., innermost) frame selected; you cannot go down.");
1802 select_frame (frame
, selected_frame_level
+ count
- count1
);
1807 down_silently_command (char *count_exp
, int from_tty
)
1809 down_silently_base (count_exp
);
1811 print_stack_frame (selected_frame
, selected_frame_level
, 1);
1815 down_command (char *count_exp
, int from_tty
)
1817 down_silently_base (count_exp
);
1818 show_and_print_stack_frame (selected_frame
, selected_frame_level
, 1);
1823 return_command_wrapper (char *retval_exp
, int from_tty
)
1825 return_command (retval_exp
, from_tty
);
1829 return_command (char *retval_exp
, int from_tty
)
1831 struct symbol
*thisfun
;
1832 CORE_ADDR selected_frame_addr
;
1833 CORE_ADDR selected_frame_pc
;
1834 struct frame_info
*frame
;
1835 value_ptr return_value
= NULL
;
1837 if (selected_frame
== NULL
)
1838 error ("No selected frame.");
1839 thisfun
= get_frame_function (selected_frame
);
1840 selected_frame_addr
= FRAME_FP (selected_frame
);
1841 selected_frame_pc
= selected_frame
->pc
;
1843 /* Compute the return value (if any -- possibly getting errors here). */
1847 struct type
*return_type
= NULL
;
1849 return_value
= parse_and_eval (retval_exp
);
1851 /* Cast return value to the return type of the function. */
1852 if (thisfun
!= NULL
)
1853 return_type
= TYPE_TARGET_TYPE (SYMBOL_TYPE (thisfun
));
1854 if (return_type
== NULL
)
1855 return_type
= builtin_type_int
;
1856 return_value
= value_cast (return_type
, return_value
);
1858 /* Make sure we have fully evaluated it, since
1859 it might live in the stack frame we're about to pop. */
1860 if (VALUE_LAZY (return_value
))
1861 value_fetch_lazy (return_value
);
1864 /* If interactive, require confirmation. */
1870 if (!query ("Make %s return now? ", SYMBOL_SOURCE_NAME (thisfun
)))
1872 error ("Not confirmed.");
1876 else if (!query ("Make selected stack frame return now? "))
1877 error ("Not confirmed.");
1880 /* Do the real work. Pop until the specified frame is current. We
1881 use this method because the selected_frame is not valid after
1882 a POP_FRAME. The pc comparison makes this work even if the
1883 selected frame shares its fp with another frame. */
1885 while (selected_frame_addr
!= (frame
= get_current_frame ())->frame
1886 || selected_frame_pc
!= frame
->pc
)
1889 /* Then pop that frame. */
1893 /* Compute the return value (if any) and store in the place
1894 for return values. */
1897 set_return_value (return_value
);
1899 /* If we are at the end of a call dummy now, pop the dummy frame too. */
1901 if (CALL_DUMMY_HAS_COMPLETED (read_pc(), read_sp (),
1902 FRAME_FP (get_current_frame ())))
1905 /* If interactive, print the frame that is now current. */
1908 frame_command ("0", 1);
1910 select_frame_command ("0", 0);
1913 /* Sets the scope to input function name, provided that the
1914 function is within the current stack frame */
1916 struct function_bounds
1918 CORE_ADDR low
, high
;
1921 static void func_command (char *arg
, int from_tty
);
1923 func_command (char *arg
, int from_tty
)
1925 struct frame_info
*fp
;
1927 struct symtabs_and_lines sals
;
1930 struct function_bounds
*func_bounds
= (struct function_bounds
*) NULL
;
1932 if (arg
!= (char *) NULL
)
1935 fp
= parse_frame_specification ("0");
1936 sals
= decode_line_spec (arg
, 1);
1937 func_bounds
= (struct function_bounds
*) xmalloc (
1938 sizeof (struct function_bounds
) * sals
.nelts
);
1939 for (i
= 0; (i
< sals
.nelts
&& !found
); i
++)
1941 if (sals
.sals
[i
].pc
== (CORE_ADDR
) 0 ||
1942 find_pc_partial_function (sals
.sals
[i
].pc
,
1944 &func_bounds
[i
].low
,
1945 &func_bounds
[i
].high
) == 0)
1947 func_bounds
[i
].low
=
1948 func_bounds
[i
].high
= (CORE_ADDR
) NULL
;
1954 for (i
= 0; (i
< sals
.nelts
&& !found
); i
++)
1955 found
= (fp
->pc
>= func_bounds
[i
].low
&&
1956 fp
->pc
< func_bounds
[i
].high
);
1960 fp
= find_relative_frame (fp
, &level
);
1963 while (!found
&& level
== 0);
1966 xfree (func_bounds
);
1969 printf_filtered ("'%s' not within current stack frame.\n", arg
);
1970 else if (fp
!= selected_frame
)
1971 select_and_print_frame (fp
, level
);
1974 /* Gets the language of the current frame. */
1977 get_frame_language (void)
1979 register struct symtab
*s
;
1980 enum language flang
; /* The language of the current frame */
1984 s
= find_pc_symtab (selected_frame
->pc
);
1986 flang
= s
->language
;
1988 flang
= language_unknown
;
1991 flang
= language_unknown
;
1997 _initialize_stack (void)
2000 backtrace_limit
= 30;
2003 add_com ("return", class_stack
, return_command
,
2004 "Make selected stack frame return to its caller.\n\
2005 Control remains in the debugger, but when you continue\n\
2006 execution will resume in the frame above the one now selected.\n\
2007 If an argument is given, it is an expression for the value to return.");
2009 add_com ("up", class_stack
, up_command
,
2010 "Select and print stack frame that called this one.\n\
2011 An argument says how many frames up to go.");
2012 add_com ("up-silently", class_support
, up_silently_command
,
2013 "Same as the `up' command, but does not print anything.\n\
2014 This is useful in command scripts.");
2016 add_com ("down", class_stack
, down_command
,
2017 "Select and print stack frame called by this one.\n\
2018 An argument says how many frames down to go.");
2019 add_com_alias ("do", "down", class_stack
, 1);
2020 add_com_alias ("dow", "down", class_stack
, 1);
2021 add_com ("down-silently", class_support
, down_silently_command
,
2022 "Same as the `down' command, but does not print anything.\n\
2023 This is useful in command scripts.");
2025 add_com ("frame", class_stack
, frame_command
,
2026 "Select and print a stack frame.\n\
2027 With no argument, print the selected stack frame. (See also \"info frame\").\n\
2028 An argument specifies the frame to select.\n\
2029 It can be a stack frame number or the address of the frame.\n\
2030 With argument, nothing is printed if input is coming from\n\
2031 a command file or a user-defined command.");
2033 add_com_alias ("f", "frame", class_stack
, 1);
2037 add_com ("L", class_stack
, current_frame_command
,
2038 "Print the current stack frame.\n");
2039 add_com_alias ("V", "frame", class_stack
, 1);
2041 add_com ("select-frame", class_stack
, select_frame_command
,
2042 "Select a stack frame without printing anything.\n\
2043 An argument specifies the frame to select.\n\
2044 It can be a stack frame number or the address of the frame.\n");
2046 add_com ("backtrace", class_stack
, backtrace_command
,
2047 "Print backtrace of all stack frames, or innermost COUNT frames.\n\
2048 With a negative argument, print outermost -COUNT frames.\n\
2049 Use of the 'full' qualifier also prints the values of the local variables.\n");
2050 add_com_alias ("bt", "backtrace", class_stack
, 0);
2053 add_com_alias ("t", "backtrace", class_stack
, 0);
2054 add_com ("T", class_stack
, backtrace_full_command
,
2055 "Print backtrace of all stack frames, or innermost COUNT frames \n\
2056 and the values of the local variables.\n\
2057 With a negative argument, print outermost -COUNT frames.\n\
2058 Usage: T <count>\n");
2061 add_com_alias ("where", "backtrace", class_alias
, 0);
2062 add_info ("stack", backtrace_command
,
2063 "Backtrace of the stack, or innermost COUNT frames.");
2064 add_info_alias ("s", "stack", 1);
2065 add_info ("frame", frame_info
,
2066 "All about selected stack frame, or frame at ADDR.");
2067 add_info_alias ("f", "frame", 1);
2068 add_info ("locals", locals_info
,
2069 "Local variables of current stack frame.");
2070 add_info ("args", args_info
,
2071 "Argument variables of current stack frame.");
2073 add_com ("l", class_info
, args_plus_locals_info
,
2074 "Argument and local variables of current stack frame.");
2077 add_com ("func", class_stack
, func_command
,
2078 "Select the stack frame that contains <func>.\nUsage: func <name>\n");
2080 add_info ("catch", catch_info
,
2081 "Exceptions that can be caught in the current stack frame.");
2084 add_cmd ("backtrace-limit", class_stack
, set_backtrace_limit_command
,
2085 "Specify maximum number of frames for \"backtrace\" to print by default.",
2087 add_info ("backtrace-limit", backtrace_limit_info
,
2088 "The maximum number of frames for \"backtrace\" to print by default.");