1 /* Print and select stack frames for GDB, the GNU debugger.
3 Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994,
4 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002 Free Software
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 59 Temple Place - Suite 330,
22 Boston, MA 02111-1307, USA. */
26 #include "gdb_string.h"
30 #include "expression.h"
36 #include "breakpoint.h"
42 /* Prototypes for exported functions. */
44 void args_info (char *, int);
46 void locals_info (char *, int);
48 void (*selected_frame_level_changed_hook
) (int);
50 void _initialize_stack (void);
52 /* Prototypes for local functions. */
54 static void return_command (char *, int);
56 static void down_command (char *, int);
58 static void down_silently_base (char *);
60 static void down_silently_command (char *, int);
62 static void up_command (char *, int);
64 static void up_silently_base (char *);
66 static void up_silently_command (char *, int);
68 void frame_command (char *, int);
70 static void current_frame_command (char *, int);
72 static void select_frame_command (char *, int);
74 static void print_frame_arg_vars (struct frame_info
*, struct ui_file
*);
76 static void catch_info (char *, int);
78 static void args_plus_locals_info (char *, int);
80 static void print_frame_label_vars (struct frame_info
*, int,
83 static void print_frame_local_vars (struct frame_info
*, int,
86 static int print_block_frame_labels (struct block
*, int *,
89 static int print_block_frame_locals (struct block
*,
94 static void print_frame (struct frame_info
*fi
,
98 struct symtab_and_line sal
);
100 static void print_frame_info_base (struct frame_info
*, int, int, int);
102 static void print_stack_frame_base (struct frame_info
*, int, int);
104 static void backtrace_command (char *, int);
106 struct frame_info
*parse_frame_specification (char *);
108 static void frame_info (char *, int);
110 extern int addressprint
; /* Print addresses, or stay symbolic only? */
111 extern int lines_to_list
; /* # of lines "list" command shows by default */
113 /* The "selected" stack frame is used by default for local and arg access.
114 May be zero, for no selected frame. */
116 struct frame_info
*selected_frame
;
118 /* Level of the selected frame:
119 0 for innermost, 1 for its caller, ...
120 or -1 for frame specified by address with no defined level. */
122 /* FIXME: cagney/2002-04-21: The variable `selected_frame_level' is
123 deprecated. It will dissapear `real soon now'. */
125 int selected_frame_level
; /* DEPRECATED */
127 /* Level of the selected frame: 0 for innermost, 1 for its caller, ...
128 or -1 for NULL frame. */
131 frame_relative_level (struct frame_info
*fi
)
139 /* Zero means do things normally; we are interacting directly with the
140 user. One means print the full filename and linenumber when a
141 frame is printed, and do so in a format emacs18/emacs19.22 can
142 parse. Two means print similar annotations, but in many more
143 cases and in a slightly different syntax. */
145 int annotation_level
= 0;
148 struct print_stack_frame_args
150 struct frame_info
*fi
;
156 static int print_stack_frame_base_stub (char *);
158 /* Show and print the frame arguments.
159 Pass the args the way catch_errors wants them. */
160 static int show_and_print_stack_frame_stub (void *args
);
162 show_and_print_stack_frame_stub (void *args
)
164 struct print_stack_frame_args
*p
= (struct print_stack_frame_args
*) args
;
166 print_frame_info (p
->fi
, p
->level
, p
->source
, p
->args
);
171 /* Show or print the frame arguments.
172 Pass the args the way catch_errors wants them. */
173 static int print_stack_frame_stub (void *args
);
175 print_stack_frame_stub (void *args
)
177 struct print_stack_frame_args
*p
= (struct print_stack_frame_args
*) args
;
179 print_frame_info_base (p
->fi
, p
->level
, p
->source
, p
->args
);
183 /* Print a stack frame briefly. FRAME_INFI should be the frame info
184 and LEVEL should be its level in the stack (or -1 for level not
187 /* Pass the args the way catch_errors wants them. */
189 print_stack_frame_base_stub (char *args
)
191 struct print_stack_frame_args
*p
= (struct print_stack_frame_args
*) args
;
193 print_frame_info_base (p
->fi
, p
->level
, p
->source
, p
->args
);
197 /* print the frame arguments to the terminal.
198 Pass the args the way catch_errors wants them. */
199 static int print_only_stack_frame_stub (void *);
201 print_only_stack_frame_stub (void *args
)
203 struct print_stack_frame_args
*p
= (struct print_stack_frame_args
*) args
;
205 print_frame_info_base (p
->fi
, p
->level
, p
->source
, p
->args
);
209 /* Print a stack frame briefly. FRAME_INFI should be the frame info
210 and LEVEL should be its level in the stack (or -1 for level not defined).
211 This prints the level, the function executing, the arguments,
212 and the file name and line number.
213 If the pc is not at the beginning of the source line,
214 the actual pc is printed at the beginning.
216 If SOURCE is 1, print the source line as well.
217 If SOURCE is -1, print ONLY the source line. */
220 print_stack_frame_base (struct frame_info
*fi
, int level
, int source
)
222 struct print_stack_frame_args args
;
226 args
.source
= source
;
229 catch_errors (print_stack_frame_stub
, &args
, "", RETURN_MASK_ALL
);
232 /* Show and print a stack frame briefly. FRAME_INFI should be the frame info
233 and LEVEL should be its level in the stack (or -1 for level not defined).
234 This prints the level, the function executing, the arguments,
235 and the file name and line number.
236 If the pc is not at the beginning of the source line,
237 the actual pc is printed at the beginning.
239 If SOURCE is 1, print the source line as well.
240 If SOURCE is -1, print ONLY the source line. */
243 show_and_print_stack_frame (struct frame_info
*fi
, int level
, int source
)
245 struct print_stack_frame_args args
;
249 args
.source
= source
;
252 catch_errors (show_and_print_stack_frame_stub
, &args
, "", RETURN_MASK_ALL
);
256 /* Show or print a stack frame briefly. FRAME_INFI should be the frame info
257 and LEVEL should be its level in the stack (or -1 for level not defined).
258 This prints the level, the function executing, the arguments,
259 and the file name and line number.
260 If the pc is not at the beginning of the source line,
261 the actual pc is printed at the beginning.
263 If SOURCE is 1, print the source line as well.
264 If SOURCE is -1, print ONLY the source line. */
267 print_stack_frame (struct frame_info
*fi
, int level
, int source
)
269 struct print_stack_frame_args args
;
273 args
.source
= source
;
276 catch_errors (print_stack_frame_stub
, (char *) &args
, "", RETURN_MASK_ALL
);
279 /* Print a stack frame briefly. FRAME_INFI should be the frame info
280 and LEVEL should be its level in the stack (or -1 for level not defined).
281 This prints the level, the function executing, the arguments,
282 and the file name and line number.
283 If the pc is not at the beginning of the source line,
284 the actual pc is printed at the beginning.
286 If SOURCE is 1, print the source line as well.
287 If SOURCE is -1, print ONLY the source line. */
290 print_only_stack_frame (struct frame_info
*fi
, int level
, int source
)
292 struct print_stack_frame_args args
;
296 args
.source
= source
;
299 catch_errors (print_only_stack_frame_stub
, &args
, "", RETURN_MASK_ALL
);
302 struct print_args_args
305 struct frame_info
*fi
;
306 struct ui_file
*stream
;
309 static int print_args_stub (PTR
);
311 /* Pass the args the way catch_errors wants them. */
314 print_args_stub (PTR args
)
317 struct print_args_args
*p
= (struct print_args_args
*) args
;
319 numargs
= FRAME_NUM_ARGS (p
->fi
);
320 print_frame_args (p
->func
, p
->fi
, numargs
, p
->stream
);
324 /* Print information about a frame for frame "fi" at level "level".
325 Used in "where" output, also used to emit breakpoint or step
327 LEVEL is the level of the frame, or -1 if it is the
328 innermost frame but we don't want to print the level.
329 The meaning of the SOURCE argument is:
330 SRC_LINE: Print only source line
331 LOCATION: Print only location
332 LOC_AND_SRC: Print location and source line. */
335 print_frame_info_base (struct frame_info
*fi
, int level
, int source
, int args
)
337 struct symtab_and_line sal
;
342 char buf
[MAX_REGISTER_RAW_SIZE
];
345 /* On the 68k, this spends too much time in m68k_find_saved_regs. */
347 /* Get the value of SP_REGNUM relative to the frame. */
348 get_saved_register (buf
, (int *) NULL
, (CORE_ADDR
*) NULL
,
349 FRAME_INFO_ID (fi
), SP_REGNUM
, (enum lval_type
*) NULL
);
350 sp
= extract_address (buf
, REGISTER_RAW_SIZE (SP_REGNUM
));
352 /* This is not a perfect test, because if a function alloca's some
353 memory, puts some code there, and then jumps into it, then the test
354 will succeed even though there is no call dummy. Probably best is
355 to check for a bp_call_dummy breakpoint. */
356 if (PC_IN_CALL_DUMMY (fi
->pc
, sp
, fi
->frame
))
358 if (frame_in_dummy (fi
))
361 annotate_frame_begin (level
== -1 ? 0 : level
, fi
->pc
);
363 /* Do this regardless of SOURCE because we don't have any source
364 to list for this frame. */
366 printf_filtered ("#%-2d ", level
);
367 annotate_function_call ();
368 printf_filtered ("<function called from gdb>\n");
369 annotate_frame_end ();
372 if (fi
->signal_handler_caller
)
374 annotate_frame_begin (level
== -1 ? 0 : level
, fi
->pc
);
376 /* Do this regardless of SOURCE because we don't have any source
377 to list for this frame. */
379 printf_filtered ("#%-2d ", level
);
380 annotate_signal_handler_caller ();
381 printf_filtered ("<signal handler called>\n");
382 annotate_frame_end ();
386 /* If fi is not the innermost frame, that normally means that fi->pc
387 points to *after* the call instruction, and we want to get the line
388 containing the call, never the next line. But if the next frame is
389 a signal_handler_caller or a dummy frame, then the next frame was
390 not entered as the result of a call, and we want to get the line
391 containing fi->pc. */
393 find_pc_line (fi
->pc
,
395 && !fi
->next
->signal_handler_caller
396 && !frame_in_dummy (fi
->next
));
398 location_print
= (source
== LOCATION
399 || source
== LOC_AND_ADDRESS
400 || source
== SRC_AND_LOC
);
402 if (location_print
|| !sal
.symtab
)
403 print_frame (fi
, level
, source
, args
, sal
);
405 source_print
= (source
== SRC_LINE
|| source
== SRC_AND_LOC
);
407 if (source_print
&& sal
.symtab
)
410 int mid_statement
= (source
== SRC_LINE
) && (fi
->pc
!= sal
.pc
);
412 if (annotation_level
)
413 done
= identify_source_line (sal
.symtab
, sal
.line
, mid_statement
,
417 if (print_frame_info_listing_hook
)
419 print_frame_info_listing_hook (sal
.symtab
, sal
.line
, sal
.line
+ 1, 0);
420 current_source_symtab
= sal
.symtab
;
424 /* We used to do this earlier, but that is clearly
425 wrong. This function is used by many different
426 parts of gdb, including normal_stop in infrun.c,
427 which uses this to print out the current PC
428 when we stepi/nexti into the middle of a source
429 line. Only the command line really wants this
430 behavior. Other UIs probably would like the
431 ability to decide for themselves if it is desired. */
432 if (addressprint
&& mid_statement
)
434 ui_out_field_core_addr (uiout
, "addr", fi
->pc
);
435 ui_out_text (uiout
, "\t");
438 print_source_lines (sal
.symtab
, sal
.line
, sal
.line
+ 1, 0);
441 current_source_line
= max (sal
.line
- lines_to_list
/ 2, 1);
445 set_default_breakpoint (1, fi
->pc
, sal
.symtab
, sal
.line
);
447 annotate_frame_end ();
449 gdb_flush (gdb_stdout
);
453 print_frame (struct frame_info
*fi
,
457 struct symtab_and_line sal
)
460 register char *funname
= 0;
461 enum language funlang
= language_unknown
;
462 struct ui_stream
*stb
;
463 struct cleanup
*old_chain
;
464 struct cleanup
*list_chain
;
466 stb
= ui_out_stream_new (uiout
);
467 old_chain
= make_cleanup_ui_out_stream_delete (stb
);
469 func
= find_pc_function (fi
->pc
);
472 /* In certain pathological cases, the symtabs give the wrong
473 function (when we are in the first function in a file which
474 is compiled without debugging symbols, the previous function
475 is compiled with debugging symbols, and the "foo.o" symbol
476 that is supposed to tell us where the file with debugging symbols
477 ends has been truncated by ar because it is longer than 15
478 characters). This also occurs if the user uses asm() to create
479 a function but not stabs for it (in a file compiled -g).
481 So look in the minimal symbol tables as well, and if it comes
482 up with a larger address for the function use that instead.
483 I don't think this can ever cause any problems; there shouldn't
484 be any minimal symbols in the middle of a function; if this is
485 ever changed many parts of GDB will need to be changed (and we'll
486 create a find_pc_minimal_function or some such). */
488 struct minimal_symbol
*msymbol
= lookup_minimal_symbol_by_pc (fi
->pc
);
490 && (SYMBOL_VALUE_ADDRESS (msymbol
)
491 > BLOCK_START (SYMBOL_BLOCK_VALUE (func
))))
494 /* There is no particular reason to think the line number
495 information is wrong. Someone might have just put in
496 a label with asm() but left the line numbers alone. */
497 /* In this case we have no way of knowing the source file
498 and line number, so don't print them. */
501 /* We also don't know anything about the function besides
502 its address and name. */
504 funname
= SYMBOL_NAME (msymbol
);
505 funlang
= SYMBOL_LANGUAGE (msymbol
);
509 /* I'd like to use SYMBOL_SOURCE_NAME() here, to display the
510 demangled name that we already have stored in the symbol
511 table, but we stored a version with DMGL_PARAMS turned
512 on, and here we don't want to display parameters. So call
513 the demangler again, with DMGL_ANSI only. (Yes, I know
514 that printf_symbol_filtered() will again try to demangle
515 the name on the fly, but the issue is that if
516 cplus_demangle() fails here, it'll fail there too. So we
517 want to catch the failure ("demangled==NULL" case below)
518 here, while we still have our hands on the function
521 funname
= SYMBOL_NAME (func
);
522 funlang
= SYMBOL_LANGUAGE (func
);
523 if (funlang
== language_cplus
)
525 demangled
= cplus_demangle (funname
, DMGL_ANSI
);
526 if (demangled
== NULL
)
527 /* If the demangler fails, try the demangled name from
528 the symbol table. This'll have parameters, but
529 that's preferable to diplaying a mangled name. */
530 funname
= SYMBOL_SOURCE_NAME (func
);
536 struct minimal_symbol
*msymbol
= lookup_minimal_symbol_by_pc (fi
->pc
);
539 funname
= SYMBOL_NAME (msymbol
);
540 funlang
= SYMBOL_LANGUAGE (msymbol
);
544 annotate_frame_begin (level
== -1 ? 0 : level
, fi
->pc
);
546 list_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "frame");
550 ui_out_text (uiout
, "#");
551 ui_out_field_fmt (uiout
, "level", "%-2d", level
);
552 ui_out_spaces (uiout
, 1);
555 if (fi
->pc
!= sal
.pc
|| !sal
.symtab
|| source
== LOC_AND_ADDRESS
)
557 annotate_frame_address ();
558 ui_out_field_core_addr (uiout
, "addr", fi
->pc
);
559 annotate_frame_address_end ();
560 ui_out_text (uiout
, " in ");
562 annotate_frame_function_name ();
563 fprintf_symbol_filtered (stb
->stream
, funname
? funname
: "??", funlang
,
565 ui_out_field_stream (uiout
, "func", stb
);
566 ui_out_wrap_hint (uiout
, " ");
567 annotate_frame_args ();
569 ui_out_text (uiout
, " (");
572 struct print_args_args args
;
573 struct cleanup
*args_list_chain
;
576 args
.stream
= gdb_stdout
;
577 args_list_chain
= make_cleanup_ui_out_list_begin_end (uiout
, "args");
578 catch_errors (print_args_stub
, &args
, "", RETURN_MASK_ALL
);
579 /* FIXME: args must be a list. If one argument is a string it will
580 have " that will not be properly escaped. */
581 /* Invoke ui_out_tuple_end. */
582 do_cleanups (args_list_chain
);
585 ui_out_text (uiout
, ")");
586 if (sal
.symtab
&& sal
.symtab
->filename
)
588 annotate_frame_source_begin ();
589 ui_out_wrap_hint (uiout
, " ");
590 ui_out_text (uiout
, " at ");
591 annotate_frame_source_file ();
592 ui_out_field_string (uiout
, "file", sal
.symtab
->filename
);
593 annotate_frame_source_file_end ();
594 ui_out_text (uiout
, ":");
595 annotate_frame_source_line ();
596 ui_out_field_int (uiout
, "line", sal
.line
);
597 annotate_frame_source_end ();
601 if (!funname
|| (!sal
.symtab
|| !sal
.symtab
->filename
))
603 char *lib
= PC_SOLIB (fi
->pc
);
606 annotate_frame_where ();
607 ui_out_wrap_hint (uiout
, " ");
608 ui_out_text (uiout
, " from ");
609 ui_out_field_string (uiout
, "from", lib
);
612 #endif /* PC_SOLIB */
614 /* do_cleanups will call ui_out_tuple_end() for us. */
615 do_cleanups (list_chain
);
616 ui_out_text (uiout
, "\n");
617 do_cleanups (old_chain
);
621 /* Show or print the frame info. If this is the tui, it will be shown in
622 the source display */
624 print_frame_info (struct frame_info
*fi
, register int level
, int source
,
627 print_frame_info_base (fi
, level
, source
, args
);
630 /* Show the frame info. If this is the tui, it will be shown in
631 the source display otherwise, nothing is done */
633 show_stack_frame (struct frame_info
*fi
)
638 /* Read a frame specification in whatever the appropriate format is.
639 Call error() if the specification is in any way invalid (i.e.
640 this function never returns NULL). */
643 parse_frame_specification (char *frame_exp
)
647 CORE_ADDR args
[MAXARGS
];
652 char *addr_string
, *p
;
653 struct cleanup
*tmp_cleanup
;
655 while (*frame_exp
== ' ')
660 if (numargs
> MAXARGS
)
661 error ("Too many args in frame specification");
662 /* Parse an argument. */
663 for (p
= frame_exp
; *p
&& *p
!= ' '; p
++)
665 addr_string
= savestring (frame_exp
, p
- frame_exp
);
670 tmp_cleanup
= make_cleanup (xfree
, addr_string
);
672 /* NOTE: we call parse_and_eval and then both
673 value_as_long and value_as_address rather than calling
674 parse_and_eval_long and parse_and_eval_address because
675 of the issue of potential side effects from evaluating
677 vp
= parse_and_eval (addr_string
);
679 level
= value_as_long (vp
);
681 args
[numargs
++] = value_as_address (vp
);
682 do_cleanups (tmp_cleanup
);
685 /* Skip spaces, move to possible next arg. */
695 if (selected_frame
== NULL
)
696 error ("No selected frame.");
697 return selected_frame
;
701 struct frame_info
*fid
=
702 find_relative_frame (get_current_frame (), &level
);
703 struct frame_info
*tfid
;
706 /* find_relative_frame was successful */
709 /* If SETUP_ARBITRARY_FRAME is defined, then frame specifications
710 take at least 2 addresses. It is important to detect this case
711 here so that "frame 100" does not give a confusing error message
712 like "frame specification requires two addresses". This of course
713 does not solve the "frame 100" problem for machines on which
714 a frame specification can be made with one address. To solve
715 that, we need a new syntax for a specifying a frame by address.
716 I think the cleanest syntax is $frame(0x45) ($frame(0x23,0x45) for
717 two args, etc.), but people might think that is too much typing,
718 so I guess *0x23,0x45 would be a possible alternative (commas
719 really should be used instead of spaces to delimit; using spaces
720 normally works in an expression). */
721 #ifdef SETUP_ARBITRARY_FRAME
722 error ("No frame %s", paddr_d (args
[0]));
725 /* If (s)he specifies the frame with an address, he deserves what
726 (s)he gets. Still, give the highest one that matches. */
728 for (fid
= get_current_frame ();
729 fid
&& fid
->frame
!= args
[0];
730 fid
= get_prev_frame (fid
))
734 while ((tfid
= get_prev_frame (fid
)) &&
735 (tfid
->frame
== args
[0]))
738 /* We couldn't identify the frame as an existing frame, but
739 perhaps we can create one with a single argument. */
743 #ifdef SETUP_ARBITRARY_FRAME
744 return SETUP_ARBITRARY_FRAME (numargs
, args
);
746 /* Usual case. Do it here rather than have everyone supply
747 a SETUP_ARBITRARY_FRAME that does this. */
749 return create_new_frame (args
[0], 0);
750 error ("Too many args in frame specification");
757 /* FRAME_ARGS_ADDRESS_CORRECT is just like FRAME_ARGS_ADDRESS except
758 that if it is unsure about the answer, it returns 0
759 instead of guessing (this happens on the VAX and i960, for example).
761 On most machines, we never have to guess about the args address,
762 so FRAME_ARGS_ADDRESS{,_CORRECT} are the same. */
763 #if !defined (FRAME_ARGS_ADDRESS_CORRECT)
764 #define FRAME_ARGS_ADDRESS_CORRECT FRAME_ARGS_ADDRESS
767 /* Print verbosely the selected frame or the frame at address ADDR.
768 This means absolutely all information in the frame is printed. */
771 frame_info (char *addr_exp
, int from_tty
)
773 struct frame_info
*fi
;
774 struct symtab_and_line sal
;
777 struct frame_info
*calling_frame_info
;
778 int i
, count
, numregs
;
780 enum language funlang
= language_unknown
;
782 if (!target_has_stack
)
785 fi
= parse_frame_specification (addr_exp
);
787 error ("Invalid frame specified.");
789 sal
= find_pc_line (fi
->pc
,
791 && !fi
->next
->signal_handler_caller
792 && !frame_in_dummy (fi
->next
));
793 func
= get_frame_function (fi
);
794 s
= find_pc_symtab (fi
->pc
);
797 /* I'd like to use SYMBOL_SOURCE_NAME() here, to display
798 * the demangled name that we already have stored in
799 * the symbol table, but we stored a version with
800 * DMGL_PARAMS turned on, and here we don't want
801 * to display parameters. So call the demangler again,
802 * with DMGL_ANSI only. RT
803 * (Yes, I know that printf_symbol_filtered() will
804 * again try to demangle the name on the fly, but
805 * the issue is that if cplus_demangle() fails here,
806 * it'll fail there too. So we want to catch the failure
807 * ("demangled==NULL" case below) here, while we still
808 * have our hands on the function symbol.)
811 funname
= SYMBOL_NAME (func
);
812 funlang
= SYMBOL_LANGUAGE (func
);
813 if (funlang
== language_cplus
)
815 demangled
= cplus_demangle (funname
, DMGL_ANSI
);
816 /* If the demangler fails, try the demangled name
817 * from the symbol table. This'll have parameters,
818 * but that's preferable to diplaying a mangled name.
820 if (demangled
== NULL
)
821 funname
= SYMBOL_SOURCE_NAME (func
);
826 register struct minimal_symbol
*msymbol
= lookup_minimal_symbol_by_pc (fi
->pc
);
829 funname
= SYMBOL_NAME (msymbol
);
830 funlang
= SYMBOL_LANGUAGE (msymbol
);
833 calling_frame_info
= get_prev_frame (fi
);
835 if (!addr_exp
&& frame_relative_level (selected_frame
) >= 0)
837 printf_filtered ("Stack level %d, frame at ",
838 frame_relative_level (selected_frame
));
839 print_address_numeric (fi
->frame
, 1, gdb_stdout
);
840 printf_filtered (":\n");
844 printf_filtered ("Stack frame at ");
845 print_address_numeric (fi
->frame
, 1, gdb_stdout
);
846 printf_filtered (":\n");
848 printf_filtered (" %s = ", REGISTER_NAME (PC_REGNUM
));
849 print_address_numeric (fi
->pc
, 1, gdb_stdout
);
854 printf_filtered (" in ");
855 fprintf_symbol_filtered (gdb_stdout
, funname
, funlang
,
856 DMGL_ANSI
| DMGL_PARAMS
);
860 printf_filtered (" (%s:%d)", sal
.symtab
->filename
, sal
.line
);
861 puts_filtered ("; ");
863 printf_filtered ("saved %s ", REGISTER_NAME (PC_REGNUM
));
864 print_address_numeric (FRAME_SAVED_PC (fi
), 1, gdb_stdout
);
865 printf_filtered ("\n");
869 frameless
= FRAMELESS_FUNCTION_INVOCATION (fi
);
871 printf_filtered (" (FRAMELESS),");
874 if (calling_frame_info
)
876 printf_filtered (" called by frame at ");
877 print_address_numeric (calling_frame_info
->frame
, 1, gdb_stdout
);
879 if (fi
->next
&& calling_frame_info
)
884 printf_filtered (" caller of frame at ");
885 print_address_numeric (fi
->next
->frame
, 1, gdb_stdout
);
887 if (fi
->next
|| calling_frame_info
)
888 puts_filtered ("\n");
890 printf_filtered (" source language %s.\n", language_str (s
->language
));
892 #ifdef PRINT_EXTRA_FRAME_INFO
893 PRINT_EXTRA_FRAME_INFO (fi
);
897 /* Address of the argument list for this frame, or 0. */
898 CORE_ADDR arg_list
= FRAME_ARGS_ADDRESS_CORRECT (fi
);
899 /* Number of args for this frame, or -1 if unknown. */
903 printf_filtered (" Arglist at unknown address.\n");
906 printf_filtered (" Arglist at ");
907 print_address_numeric (arg_list
, 1, gdb_stdout
);
908 printf_filtered (",");
910 numargs
= FRAME_NUM_ARGS (fi
);
912 puts_filtered (" args: ");
913 else if (numargs
== 0)
914 puts_filtered (" no args.");
915 else if (numargs
== 1)
916 puts_filtered (" 1 arg: ");
918 printf_filtered (" %d args: ", numargs
);
919 print_frame_args (func
, fi
, numargs
, gdb_stdout
);
920 puts_filtered ("\n");
924 /* Address of the local variables for this frame, or 0. */
925 CORE_ADDR arg_list
= FRAME_LOCALS_ADDRESS (fi
);
928 printf_filtered (" Locals at unknown address,");
931 printf_filtered (" Locals at ");
932 print_address_numeric (arg_list
, 1, gdb_stdout
);
933 printf_filtered (",");
937 FRAME_INIT_SAVED_REGS (fi
);
938 if (fi
->saved_regs
!= NULL
)
940 /* The sp is special; what's returned isn't the save address, but
941 actually the value of the previous frame's sp. */
942 printf_filtered (" Previous frame's sp is ");
943 print_address_numeric (fi
->saved_regs
[SP_REGNUM
], 1, gdb_stdout
);
944 printf_filtered ("\n");
946 numregs
= NUM_REGS
+ NUM_PSEUDO_REGS
;
947 for (i
= 0; i
< numregs
; i
++)
948 if (fi
->saved_regs
[i
] && i
!= SP_REGNUM
)
951 puts_filtered (" Saved registers:\n ");
955 printf_filtered (" %s at ", REGISTER_NAME (i
));
956 print_address_numeric (fi
->saved_regs
[i
], 1, gdb_stdout
);
960 puts_filtered ("\n");
964 /* We could get some information about saved registers by
965 calling get_saved_register on each register. Which info goes
966 with which frame is necessarily lost, however, and I suspect
967 that the users don't care whether they get the info. */
968 puts_filtered ("\n");
973 /* Set a limit on the number of frames printed by default in a
976 static int backtrace_limit
;
979 set_backtrace_limit_command (char *count_exp
, int from_tty
)
981 int count
= parse_and_eval_long (count_exp
);
984 error ("Negative argument not meaningful as backtrace limit.");
986 backtrace_limit
= count
;
990 backtrace_limit_info (char *arg
, int from_tty
)
993 error ("\"Info backtrace-limit\" takes no arguments.");
995 printf_unfiltered ("Backtrace limit: %d.\n", backtrace_limit
);
999 /* Print briefly all stack frames or just the innermost COUNT frames. */
1001 static void backtrace_command_1 (char *count_exp
, int show_locals
,
1004 backtrace_command_1 (char *count_exp
, int show_locals
, int from_tty
)
1006 struct frame_info
*fi
;
1009 register struct frame_info
*trailing
;
1010 register int trailing_level
;
1012 if (!target_has_stack
)
1013 error ("No stack.");
1015 /* The following code must do two things. First, it must
1016 set the variable TRAILING to the frame from which we should start
1017 printing. Second, it must set the variable count to the number
1018 of frames which we should print, or -1 if all of them. */
1019 trailing
= get_current_frame ();
1021 /* The target can be in a state where there is no valid frames
1022 (e.g., just connected). */
1023 if (trailing
== NULL
)
1024 error ("No stack.");
1029 count
= parse_and_eval_long (count_exp
);
1032 struct frame_info
*current
;
1037 while (current
&& count
--)
1040 current
= get_prev_frame (current
);
1043 /* Will stop when CURRENT reaches the top of the stack. TRAILING
1044 will be COUNT below it. */
1048 trailing
= get_prev_frame (trailing
);
1049 current
= get_prev_frame (current
);
1061 struct partial_symtab
*ps
;
1063 /* Read in symbols for all of the frames. Need to do this in
1064 a separate pass so that "Reading in symbols for xxx" messages
1065 don't screw up the appearance of the backtrace. Also
1066 if people have strong opinions against reading symbols for
1067 backtrace this may have to be an option. */
1071 fi
= get_prev_frame (fi
))
1074 ps
= find_pc_psymtab (fi
->pc
);
1076 PSYMTAB_TO_SYMTAB (ps
); /* Force syms to come in */
1080 for (i
= 0, fi
= trailing
;
1082 i
++, fi
= get_prev_frame (fi
))
1086 /* Don't use print_stack_frame; if an error() occurs it probably
1087 means further attempts to backtrace would fail (on the other
1088 hand, perhaps the code does or could be fixed to make sure
1089 the frame->prev field gets set to NULL in that case). */
1090 print_frame_info_base (fi
, trailing_level
+ i
, 0, 1);
1092 print_frame_local_vars (fi
, 1, gdb_stdout
);
1095 /* If we've stopped before the end, mention that. */
1097 printf_filtered ("(More stack frames follow...)\n");
1101 backtrace_command (char *arg
, int from_tty
)
1103 struct cleanup
*old_chain
= (struct cleanup
*) NULL
;
1104 char **argv
= (char **) NULL
;
1105 int argIndicatingFullTrace
= (-1), totArgLen
= 0, argc
= 0;
1108 if (arg
!= (char *) NULL
)
1112 argv
= buildargv (arg
);
1113 old_chain
= make_cleanup_freeargv (argv
);
1115 for (i
= 0; (argv
[i
] != (char *) NULL
); i
++)
1119 for (j
= 0; (j
< strlen (argv
[i
])); j
++)
1120 argv
[i
][j
] = tolower (argv
[i
][j
]);
1122 if (argIndicatingFullTrace
< 0 && subset_compare (argv
[i
], "full"))
1123 argIndicatingFullTrace
= argc
;
1127 totArgLen
+= strlen (argv
[i
]);
1131 if (argIndicatingFullTrace
>= 0)
1135 argPtr
= (char *) xmalloc (totArgLen
+ 1);
1140 memset (argPtr
, 0, totArgLen
+ 1);
1141 for (i
= 0; (i
< (argc
+ 1)); i
++)
1143 if (i
!= argIndicatingFullTrace
)
1145 strcat (argPtr
, argv
[i
]);
1146 strcat (argPtr
, " ");
1152 argPtr
= (char *) NULL
;
1156 backtrace_command_1 (argPtr
, (argIndicatingFullTrace
>= 0), from_tty
);
1158 if (argIndicatingFullTrace
>= 0 && totArgLen
> 0)
1162 do_cleanups (old_chain
);
1165 static void backtrace_full_command (char *arg
, int from_tty
);
1167 backtrace_full_command (char *arg
, int from_tty
)
1169 backtrace_command_1 (arg
, 1, from_tty
);
1173 /* Print the local variables of a block B active in FRAME.
1174 Return 1 if any variables were printed; 0 otherwise. */
1177 print_block_frame_locals (struct block
*b
, register struct frame_info
*fi
,
1178 int num_tabs
, register struct ui_file
*stream
)
1181 register struct symbol
*sym
;
1182 register int values_printed
= 0;
1184 ALL_BLOCK_SYMBOLS (b
, i
, sym
)
1186 switch (SYMBOL_CLASS (sym
))
1193 for (j
= 0; j
< num_tabs
; j
++)
1194 fputs_filtered ("\t", stream
);
1195 fputs_filtered (SYMBOL_SOURCE_NAME (sym
), stream
);
1196 fputs_filtered (" = ", stream
);
1197 print_variable_value (sym
, fi
, stream
);
1198 fprintf_filtered (stream
, "\n");
1202 /* Ignore symbols which are not locals. */
1206 return values_printed
;
1209 /* Same, but print labels. */
1212 print_block_frame_labels (struct block
*b
, int *have_default
,
1213 register struct ui_file
*stream
)
1216 register struct symbol
*sym
;
1217 register int values_printed
= 0;
1219 ALL_BLOCK_SYMBOLS (b
, i
, sym
)
1221 if (STREQ (SYMBOL_NAME (sym
), "default"))
1227 if (SYMBOL_CLASS (sym
) == LOC_LABEL
)
1229 struct symtab_and_line sal
;
1230 sal
= find_pc_line (SYMBOL_VALUE_ADDRESS (sym
), 0);
1232 fputs_filtered (SYMBOL_SOURCE_NAME (sym
), stream
);
1235 fprintf_filtered (stream
, " ");
1236 print_address_numeric (SYMBOL_VALUE_ADDRESS (sym
), 1, stream
);
1238 fprintf_filtered (stream
, " in file %s, line %d\n",
1239 sal
.symtab
->filename
, sal
.line
);
1242 return values_printed
;
1245 /* Print on STREAM all the local variables in frame FRAME,
1246 including all the blocks active in that frame
1249 Returns 1 if the job was done,
1250 or 0 if nothing was printed because we have no info
1251 on the function running in FRAME. */
1254 print_frame_local_vars (register struct frame_info
*fi
, register int num_tabs
,
1255 register struct ui_file
*stream
)
1257 register struct block
*block
= get_frame_block (fi
, 0);
1258 register int values_printed
= 0;
1262 fprintf_filtered (stream
, "No symbol table info available.\n");
1268 if (print_block_frame_locals (block
, fi
, num_tabs
, stream
))
1270 /* After handling the function's top-level block, stop.
1271 Don't continue to its superblock, the block of
1272 per-file symbols. */
1273 if (BLOCK_FUNCTION (block
))
1275 block
= BLOCK_SUPERBLOCK (block
);
1278 if (!values_printed
)
1280 fprintf_filtered (stream
, "No locals.\n");
1284 /* Same, but print labels. */
1287 print_frame_label_vars (register struct frame_info
*fi
, int this_level_only
,
1288 register struct ui_file
*stream
)
1290 register struct blockvector
*bl
;
1291 register struct block
*block
= get_frame_block (fi
, 0);
1292 register int values_printed
= 0;
1293 int index
, have_default
= 0;
1294 char *blocks_printed
;
1295 CORE_ADDR pc
= fi
->pc
;
1299 fprintf_filtered (stream
, "No symbol table info available.\n");
1303 bl
= blockvector_for_pc (BLOCK_END (block
) - 4, &index
);
1304 blocks_printed
= (char *) alloca (BLOCKVECTOR_NBLOCKS (bl
) * sizeof (char));
1305 memset (blocks_printed
, 0, BLOCKVECTOR_NBLOCKS (bl
) * sizeof (char));
1309 CORE_ADDR end
= BLOCK_END (block
) - 4;
1312 if (bl
!= blockvector_for_pc (end
, &index
))
1313 error ("blockvector blotch");
1314 if (BLOCKVECTOR_BLOCK (bl
, index
) != block
)
1315 error ("blockvector botch");
1316 last_index
= BLOCKVECTOR_NBLOCKS (bl
);
1319 /* Don't print out blocks that have gone by. */
1320 while (index
< last_index
1321 && BLOCK_END (BLOCKVECTOR_BLOCK (bl
, index
)) < pc
)
1324 while (index
< last_index
1325 && BLOCK_END (BLOCKVECTOR_BLOCK (bl
, index
)) < end
)
1327 if (blocks_printed
[index
] == 0)
1329 if (print_block_frame_labels (BLOCKVECTOR_BLOCK (bl
, index
), &have_default
, stream
))
1331 blocks_printed
[index
] = 1;
1337 if (values_printed
&& this_level_only
)
1340 /* After handling the function's top-level block, stop.
1341 Don't continue to its superblock, the block of
1342 per-file symbols. */
1343 if (BLOCK_FUNCTION (block
))
1345 block
= BLOCK_SUPERBLOCK (block
);
1348 if (!values_printed
&& !this_level_only
)
1350 fprintf_filtered (stream
, "No catches.\n");
1356 locals_info (char *args
, int from_tty
)
1358 if (!selected_frame
)
1359 error ("No frame selected.");
1360 print_frame_local_vars (selected_frame
, 0, gdb_stdout
);
1364 catch_info (char *ignore
, int from_tty
)
1366 struct symtab_and_line
*sal
;
1368 /* Check for target support for exception handling */
1369 sal
= target_enable_exception_callback (EX_EVENT_CATCH
, 1);
1372 /* Currently not handling this */
1373 /* Ideally, here we should interact with the C++ runtime
1374 system to find the list of active handlers, etc. */
1375 fprintf_filtered (gdb_stdout
, "Info catch not supported with this target/compiler combination.\n");
1377 if (!selected_frame
)
1378 error ("No frame selected.");
1383 /* Assume g++ compiled code -- old v 4.16 behaviour */
1384 if (!selected_frame
)
1385 error ("No frame selected.");
1387 print_frame_label_vars (selected_frame
, 0, gdb_stdout
);
1392 print_frame_arg_vars (register struct frame_info
*fi
,
1393 register struct ui_file
*stream
)
1395 struct symbol
*func
= get_frame_function (fi
);
1396 register struct block
*b
;
1398 register struct symbol
*sym
, *sym2
;
1399 register int values_printed
= 0;
1403 fprintf_filtered (stream
, "No symbol table info available.\n");
1407 b
= SYMBOL_BLOCK_VALUE (func
);
1408 ALL_BLOCK_SYMBOLS (b
, i
, sym
)
1410 switch (SYMBOL_CLASS (sym
))
1416 case LOC_REGPARM_ADDR
:
1417 case LOC_BASEREG_ARG
:
1419 fputs_filtered (SYMBOL_SOURCE_NAME (sym
), stream
);
1420 fputs_filtered (" = ", stream
);
1422 /* We have to look up the symbol because arguments can have
1423 two entries (one a parameter, one a local) and the one we
1424 want is the local, which lookup_symbol will find for us.
1425 This includes gcc1 (not gcc2) on the sparc when passing a
1426 small structure and gcc2 when the argument type is float
1427 and it is passed as a double and converted to float by
1428 the prologue (in the latter case the type of the LOC_ARG
1429 symbol is double and the type of the LOC_LOCAL symbol is
1430 float). There are also LOC_ARG/LOC_REGISTER pairs which
1431 are not combined in symbol-reading. */
1433 sym2
= lookup_symbol (SYMBOL_NAME (sym
),
1434 b
, VAR_NAMESPACE
, (int *) NULL
, (struct symtab
**) NULL
);
1435 print_variable_value (sym2
, fi
, stream
);
1436 fprintf_filtered (stream
, "\n");
1440 /* Don't worry about things which aren't arguments. */
1444 if (!values_printed
)
1446 fprintf_filtered (stream
, "No arguments.\n");
1451 args_info (char *ignore
, int from_tty
)
1453 if (!selected_frame
)
1454 error ("No frame selected.");
1455 print_frame_arg_vars (selected_frame
, gdb_stdout
);
1460 args_plus_locals_info (char *ignore
, int from_tty
)
1462 args_info (ignore
, from_tty
);
1463 locals_info (ignore
, from_tty
);
1467 /* Select frame FI, and note that its stack level is LEVEL.
1468 LEVEL may be -1 if an actual level number is not known. */
1471 select_frame (struct frame_info
*fi
, int level
)
1473 register struct symtab
*s
;
1475 selected_frame
= fi
;
1476 /* FIXME: cagney/2002-04-21: The variable `selected_frame_level' is
1477 deprecated. It will dissapear `real soon now'. */
1478 selected_frame_level
= level
; /* DEPRECATED */
1479 /* FIXME: cagney/2002-04-05: It can't be this easy (and looking at
1480 the increasingly complex list of checkes, it wasn't)! GDB is
1481 dragging around, and constantly updating, the global variable
1482 selected_frame_level. Surely all that was needed was for the
1483 level to be computed direct from the frame (by counting back to
1484 the inner-most frame) or, as has been done here using a cached
1485 value. For moment, check that the expected and the actual level
1486 are consistent. If, after a few weeks, no one reports that this
1487 assertion has failed, the global selected_frame_level and many
1488 many parameters can all be deleted. */
1489 if (fi
== NULL
&& level
== -1)
1490 /* Ok. The target is clearing the selected frame as part of a
1493 else if (fi
!= NULL
&& fi
->level
== level
)
1494 /* Ok. What you would expect. Level is redundant. */
1496 else if (fi
!= NULL
&& level
== -1)
1497 /* Ok. See breakpoint.c. The watchpoint code changes the
1498 selected frame to the frame that contains the watchpoint and
1499 then, later changes it back to the old value. The -1 is used
1500 as a marker so that the watchpoint code can easily detect that
1501 things are not what they should be. Why the watchpoint code
1502 can't mindlessly save/restore the selected frame I don't know,
1503 hopefully it can be simplified that way. Hopefully the global
1504 selected_frame can be replaced by a frame parameter, making
1505 still more simplification possible. */
1508 internal_error (__FILE__
, __LINE__
,
1509 "Conflicting frame levels fi->level=%d, level=%d",
1510 (fi
? fi
->level
: -1),
1512 if (selected_frame_level_changed_hook
)
1513 selected_frame_level_changed_hook (level
);
1515 /* Ensure that symbols for this frame are read in. Also, determine the
1516 source language of this frame, and switch to it if desired. */
1519 s
= find_pc_symtab (fi
->pc
);
1521 && s
->language
!= current_language
->la_language
1522 && s
->language
!= language_unknown
1523 && language_mode
== language_mode_auto
)
1525 set_language (s
->language
);
1531 /* Select frame FI, noting that its stack level is LEVEL. Also print
1532 the stack frame and show the source if this is the tui version. */
1534 select_and_print_frame (struct frame_info
*fi
, int level
)
1536 select_frame (fi
, level
);
1539 print_stack_frame (fi
, level
, 1);
1544 /* Store the selected frame and its level into *FRAMEP and *LEVELP.
1545 If there is no selected frame, *FRAMEP is set to NULL. */
1548 record_selected_frame (CORE_ADDR
*frameaddrp
, int *levelp
)
1550 *frameaddrp
= selected_frame
? selected_frame
->frame
: 0;
1551 *levelp
= frame_relative_level (selected_frame
);
1554 /* Return the symbol-block in which the selected frame is executing.
1555 Can return zero under various legitimate circumstances.
1557 If ADDR_IN_BLOCK is non-zero, set *ADDR_IN_BLOCK to the relevant
1558 code address within the block returned. We use this to decide
1559 which macros are in scope. */
1562 get_selected_block (CORE_ADDR
*addr_in_block
)
1564 if (!target_has_stack
)
1567 if (!selected_frame
)
1568 return get_current_block (addr_in_block
);
1569 return get_frame_block (selected_frame
, addr_in_block
);
1572 /* Find a frame a certain number of levels away from FRAME.
1573 LEVEL_OFFSET_PTR points to an int containing the number of levels.
1574 Positive means go to earlier frames (up); negative, the reverse.
1575 The int that contains the number of levels is counted toward
1576 zero as the frames for those levels are found.
1577 If the top or bottom frame is reached, that frame is returned,
1578 but the final value of *LEVEL_OFFSET_PTR is nonzero and indicates
1579 how much farther the original request asked to go. */
1582 find_relative_frame (register struct frame_info
*frame
,
1583 register int *level_offset_ptr
)
1585 register struct frame_info
*prev
;
1586 register struct frame_info
*frame1
;
1588 /* Going up is simple: just do get_prev_frame enough times
1589 or until initial frame is reached. */
1590 while (*level_offset_ptr
> 0)
1592 prev
= get_prev_frame (frame
);
1595 (*level_offset_ptr
)--;
1598 /* Going down is just as simple. */
1599 if (*level_offset_ptr
< 0)
1601 while (*level_offset_ptr
< 0)
1603 frame1
= get_next_frame (frame
);
1607 (*level_offset_ptr
)++;
1613 /* The "select_frame" command. With no arg, NOP.
1614 With arg LEVEL_EXP, select the frame at level LEVEL if it is a
1615 valid level. Otherwise, treat level_exp as an address expression
1616 and select it. See parse_frame_specification for more info on proper
1617 frame expressions. */
1621 select_frame_command_wrapper (char *level_exp
, int from_tty
)
1623 select_frame_command (level_exp
, from_tty
);
1627 select_frame_command (char *level_exp
, int from_tty
)
1629 register struct frame_info
*frame
, *frame1
;
1630 unsigned int level
= 0;
1632 if (!target_has_stack
)
1633 error ("No stack.");
1635 frame
= parse_frame_specification (level_exp
);
1637 /* Try to figure out what level this frame is. But if there is
1638 no current stack, don't error out -- let the user set one. */
1640 if (get_current_frame ())
1642 for (frame1
= get_prev_frame (0);
1643 frame1
&& frame1
!= frame
;
1644 frame1
= get_prev_frame (frame1
))
1651 select_frame (frame
, level
);
1654 /* The "frame" command. With no arg, print selected frame briefly.
1655 With arg, behaves like select_frame and then prints the selected
1659 frame_command (char *level_exp
, int from_tty
)
1661 select_frame_command (level_exp
, from_tty
);
1662 show_and_print_stack_frame (selected_frame
,
1663 frame_relative_level (selected_frame
), 1);
1666 /* The XDB Compatibility command to print the current frame. */
1669 current_frame_command (char *level_exp
, int from_tty
)
1671 if (target_has_stack
== 0 || selected_frame
== 0)
1672 error ("No stack.");
1673 print_only_stack_frame (selected_frame
,
1674 frame_relative_level (selected_frame
), 1);
1677 /* Select the frame up one or COUNT stack levels
1678 from the previously selected frame, and print it briefly. */
1682 up_silently_base (char *count_exp
)
1684 register struct frame_info
*fi
;
1685 int count
= 1, count1
;
1687 count
= parse_and_eval_long (count_exp
);
1690 if (target_has_stack
== 0 || selected_frame
== 0)
1691 error ("No stack.");
1693 fi
= find_relative_frame (selected_frame
, &count1
);
1694 if (count1
!= 0 && count_exp
== 0)
1695 error ("Initial frame selected; you cannot go up.");
1696 select_frame (fi
, frame_relative_level (selected_frame
) + count
- count1
);
1700 up_silently_command (char *count_exp
, int from_tty
)
1702 up_silently_base (count_exp
);
1706 up_command (char *count_exp
, int from_tty
)
1708 up_silently_base (count_exp
);
1709 show_and_print_stack_frame (selected_frame
,
1710 frame_relative_level (selected_frame
), 1);
1713 /* Select the frame down one or COUNT stack levels
1714 from the previously selected frame, and print it briefly. */
1718 down_silently_base (char *count_exp
)
1720 register struct frame_info
*frame
;
1721 int count
= -1, count1
;
1723 count
= -parse_and_eval_long (count_exp
);
1726 if (target_has_stack
== 0 || selected_frame
== 0)
1727 error ("No stack.");
1729 frame
= find_relative_frame (selected_frame
, &count1
);
1730 if (count1
!= 0 && count_exp
== 0)
1733 /* We only do this if count_exp is not specified. That way "down"
1734 means to really go down (and let me know if that is
1735 impossible), but "down 9999" can be used to mean go all the way
1736 down without getting an error. */
1738 error ("Bottom (i.e., innermost) frame selected; you cannot go down.");
1741 select_frame (frame
, frame_relative_level (selected_frame
) + count
- count1
);
1746 down_silently_command (char *count_exp
, int from_tty
)
1748 down_silently_base (count_exp
);
1752 down_command (char *count_exp
, int from_tty
)
1754 down_silently_base (count_exp
);
1755 show_and_print_stack_frame (selected_frame
,
1756 frame_relative_level (selected_frame
), 1);
1760 return_command_wrapper (char *retval_exp
, int from_tty
)
1762 return_command (retval_exp
, from_tty
);
1766 return_command (char *retval_exp
, int from_tty
)
1768 struct symbol
*thisfun
;
1769 CORE_ADDR selected_frame_addr
;
1770 CORE_ADDR selected_frame_pc
;
1771 struct frame_info
*frame
;
1772 struct value
*return_value
= NULL
;
1774 if (selected_frame
== NULL
)
1775 error ("No selected frame.");
1776 thisfun
= get_frame_function (selected_frame
);
1777 selected_frame_addr
= FRAME_FP (selected_frame
);
1778 selected_frame_pc
= selected_frame
->pc
;
1780 /* Compute the return value (if any -- possibly getting errors here). */
1784 struct type
*return_type
= NULL
;
1786 return_value
= parse_and_eval (retval_exp
);
1788 /* Cast return value to the return type of the function. */
1789 if (thisfun
!= NULL
)
1790 return_type
= TYPE_TARGET_TYPE (SYMBOL_TYPE (thisfun
));
1791 if (return_type
== NULL
)
1792 return_type
= builtin_type_int
;
1793 return_value
= value_cast (return_type
, return_value
);
1795 /* Make sure we have fully evaluated it, since
1796 it might live in the stack frame we're about to pop. */
1797 if (VALUE_LAZY (return_value
))
1798 value_fetch_lazy (return_value
);
1801 /* If interactive, require confirmation. */
1807 if (!query ("Make %s return now? ", SYMBOL_SOURCE_NAME (thisfun
)))
1809 error ("Not confirmed.");
1813 else if (!query ("Make selected stack frame return now? "))
1814 error ("Not confirmed.");
1817 /* Do the real work. Pop until the specified frame is current. We
1818 use this method because the selected_frame is not valid after
1819 a POP_FRAME. The pc comparison makes this work even if the
1820 selected frame shares its fp with another frame. */
1822 while (selected_frame_addr
!= (frame
= get_current_frame ())->frame
1823 || selected_frame_pc
!= frame
->pc
)
1826 /* Then pop that frame. */
1830 /* Compute the return value (if any) and store in the place
1831 for return values. */
1834 set_return_value (return_value
);
1836 /* If we are at the end of a call dummy now, pop the dummy frame too. */
1838 if (CALL_DUMMY_HAS_COMPLETED (read_pc(), read_sp (),
1839 FRAME_FP (get_current_frame ())))
1842 /* If interactive, print the frame that is now current. */
1845 frame_command ("0", 1);
1847 select_frame_command ("0", 0);
1850 /* Sets the scope to input function name, provided that the
1851 function is within the current stack frame */
1853 struct function_bounds
1855 CORE_ADDR low
, high
;
1858 static void func_command (char *arg
, int from_tty
);
1860 func_command (char *arg
, int from_tty
)
1862 struct frame_info
*fp
;
1864 struct symtabs_and_lines sals
;
1867 struct function_bounds
*func_bounds
= (struct function_bounds
*) NULL
;
1869 if (arg
!= (char *) NULL
)
1872 fp
= parse_frame_specification ("0");
1873 sals
= decode_line_spec (arg
, 1);
1874 func_bounds
= (struct function_bounds
*) xmalloc (
1875 sizeof (struct function_bounds
) * sals
.nelts
);
1876 for (i
= 0; (i
< sals
.nelts
&& !found
); i
++)
1878 if (sals
.sals
[i
].pc
== (CORE_ADDR
) 0 ||
1879 find_pc_partial_function (sals
.sals
[i
].pc
,
1881 &func_bounds
[i
].low
,
1882 &func_bounds
[i
].high
) == 0)
1884 func_bounds
[i
].low
=
1885 func_bounds
[i
].high
= (CORE_ADDR
) NULL
;
1891 for (i
= 0; (i
< sals
.nelts
&& !found
); i
++)
1892 found
= (fp
->pc
>= func_bounds
[i
].low
&&
1893 fp
->pc
< func_bounds
[i
].high
);
1897 fp
= find_relative_frame (fp
, &level
);
1900 while (!found
&& level
== 0);
1903 xfree (func_bounds
);
1906 printf_filtered ("'%s' not within current stack frame.\n", arg
);
1907 else if (fp
!= selected_frame
)
1908 select_and_print_frame (fp
, level
);
1911 /* Gets the language of the current frame. */
1914 get_frame_language (void)
1916 register struct symtab
*s
;
1917 enum language flang
; /* The language of the current frame */
1921 s
= find_pc_symtab (selected_frame
->pc
);
1923 flang
= s
->language
;
1925 flang
= language_unknown
;
1928 flang
= language_unknown
;
1934 _initialize_stack (void)
1937 backtrace_limit
= 30;
1940 add_com ("return", class_stack
, return_command
,
1941 "Make selected stack frame return to its caller.\n\
1942 Control remains in the debugger, but when you continue\n\
1943 execution will resume in the frame above the one now selected.\n\
1944 If an argument is given, it is an expression for the value to return.");
1946 add_com ("up", class_stack
, up_command
,
1947 "Select and print stack frame that called this one.\n\
1948 An argument says how many frames up to go.");
1949 add_com ("up-silently", class_support
, up_silently_command
,
1950 "Same as the `up' command, but does not print anything.\n\
1951 This is useful in command scripts.");
1953 add_com ("down", class_stack
, down_command
,
1954 "Select and print stack frame called by this one.\n\
1955 An argument says how many frames down to go.");
1956 add_com_alias ("do", "down", class_stack
, 1);
1957 add_com_alias ("dow", "down", class_stack
, 1);
1958 add_com ("down-silently", class_support
, down_silently_command
,
1959 "Same as the `down' command, but does not print anything.\n\
1960 This is useful in command scripts.");
1962 add_com ("frame", class_stack
, frame_command
,
1963 "Select and print a stack frame.\n\
1964 With no argument, print the selected stack frame. (See also \"info frame\").\n\
1965 An argument specifies the frame to select.\n\
1966 It can be a stack frame number or the address of the frame.\n\
1967 With argument, nothing is printed if input is coming from\n\
1968 a command file or a user-defined command.");
1970 add_com_alias ("f", "frame", class_stack
, 1);
1974 add_com ("L", class_stack
, current_frame_command
,
1975 "Print the current stack frame.\n");
1976 add_com_alias ("V", "frame", class_stack
, 1);
1978 add_com ("select-frame", class_stack
, select_frame_command
,
1979 "Select a stack frame without printing anything.\n\
1980 An argument specifies the frame to select.\n\
1981 It can be a stack frame number or the address of the frame.\n");
1983 add_com ("backtrace", class_stack
, backtrace_command
,
1984 "Print backtrace of all stack frames, or innermost COUNT frames.\n\
1985 With a negative argument, print outermost -COUNT frames.\n\
1986 Use of the 'full' qualifier also prints the values of the local variables.\n");
1987 add_com_alias ("bt", "backtrace", class_stack
, 0);
1990 add_com_alias ("t", "backtrace", class_stack
, 0);
1991 add_com ("T", class_stack
, backtrace_full_command
,
1992 "Print backtrace of all stack frames, or innermost COUNT frames \n\
1993 and the values of the local variables.\n\
1994 With a negative argument, print outermost -COUNT frames.\n\
1995 Usage: T <count>\n");
1998 add_com_alias ("where", "backtrace", class_alias
, 0);
1999 add_info ("stack", backtrace_command
,
2000 "Backtrace of the stack, or innermost COUNT frames.");
2001 add_info_alias ("s", "stack", 1);
2002 add_info ("frame", frame_info
,
2003 "All about selected stack frame, or frame at ADDR.");
2004 add_info_alias ("f", "frame", 1);
2005 add_info ("locals", locals_info
,
2006 "Local variables of current stack frame.");
2007 add_info ("args", args_info
,
2008 "Argument variables of current stack frame.");
2010 add_com ("l", class_info
, args_plus_locals_info
,
2011 "Argument and local variables of current stack frame.");
2014 add_com ("func", class_stack
, func_command
,
2015 "Select the stack frame that contains <func>.\nUsage: func <name>\n");
2017 add_info ("catch", catch_info
,
2018 "Exceptions that can be caught in the current stack frame.");
2021 add_cmd ("backtrace-limit", class_stack
, set_backtrace_limit_command
,
2022 "Specify maximum number of frames for \"backtrace\" to print by default.",
2024 add_info ("backtrace-limit", backtrace_limit_info
,
2025 "The maximum number of frames for \"backtrace\" to print by default.");