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"
37 #include "breakpoint.h"
43 /* Prototypes for exported functions. */
45 void args_info (char *, int);
47 void locals_info (char *, int);
49 void (*selected_frame_level_changed_hook
) (int);
51 void _initialize_stack (void);
53 /* Prototypes for local functions. */
55 static void return_command (char *, int);
57 static void down_command (char *, int);
59 static void down_silently_base (char *);
61 static void down_silently_command (char *, int);
63 static void up_command (char *, int);
65 static void up_silently_base (char *);
67 static void up_silently_command (char *, int);
69 void frame_command (char *, int);
71 static void current_frame_command (char *, int);
73 static void select_frame_command (char *, int);
75 static void print_frame_arg_vars (struct frame_info
*, struct ui_file
*);
77 static void catch_info (char *, int);
79 static void args_plus_locals_info (char *, int);
81 static void print_frame_label_vars (struct frame_info
*, int,
84 static void print_frame_local_vars (struct frame_info
*, int,
87 static int print_block_frame_labels (struct block
*, int *,
90 static int print_block_frame_locals (struct block
*,
95 static void print_frame (struct frame_info
*fi
,
99 struct symtab_and_line sal
);
101 static void print_frame_info_base (struct frame_info
*, int, int, int);
103 static void print_stack_frame_base (struct frame_info
*, int, int);
105 static void backtrace_command (char *, int);
107 struct frame_info
*parse_frame_specification (char *);
109 static void frame_info (char *, int);
111 extern int addressprint
; /* Print addresses, or stay symbolic only? */
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 /* Level of the selected frame: 0 for innermost, 1 for its caller, ...
123 or -1 for NULL frame. */
126 frame_relative_level (struct frame_info
*fi
)
134 /* Zero means do things normally; we are interacting directly with the
135 user. One means print the full filename and linenumber when a
136 frame is printed, and do so in a format emacs18/emacs19.22 can
137 parse. Two means print similar annotations, but in many more
138 cases and in a slightly different syntax. */
140 int annotation_level
= 0;
143 struct print_stack_frame_args
145 struct frame_info
*fi
;
151 static int print_stack_frame_base_stub (char *);
153 /* Show and print the frame arguments.
154 Pass the args the way catch_errors wants them. */
155 static int show_and_print_stack_frame_stub (void *args
);
157 show_and_print_stack_frame_stub (void *args
)
159 struct print_stack_frame_args
*p
= (struct print_stack_frame_args
*) args
;
161 print_frame_info (p
->fi
, p
->level
, p
->source
, p
->args
);
166 /* Show or print the frame arguments.
167 Pass the args the way catch_errors wants them. */
168 static int print_stack_frame_stub (void *args
);
170 print_stack_frame_stub (void *args
)
172 struct print_stack_frame_args
*p
= (struct print_stack_frame_args
*) args
;
174 print_frame_info_base (p
->fi
, p
->level
, p
->source
, p
->args
);
178 /* Print a stack frame briefly. FRAME_INFI should be the frame info
179 and LEVEL should be its level in the stack (or -1 for level not
182 /* Pass the args the way catch_errors wants them. */
184 print_stack_frame_base_stub (char *args
)
186 struct print_stack_frame_args
*p
= (struct print_stack_frame_args
*) args
;
188 print_frame_info_base (p
->fi
, p
->level
, p
->source
, p
->args
);
192 /* print the frame arguments to the terminal.
193 Pass the args the way catch_errors wants them. */
194 static int print_only_stack_frame_stub (void *);
196 print_only_stack_frame_stub (void *args
)
198 struct print_stack_frame_args
*p
= (struct print_stack_frame_args
*) args
;
200 print_frame_info_base (p
->fi
, p
->level
, p
->source
, p
->args
);
204 /* Print a stack frame briefly. FRAME_INFI should be the frame info
205 and LEVEL should be its level in the stack (or -1 for level not defined).
206 This prints the level, the function executing, the arguments,
207 and the file name and line number.
208 If the pc is not at the beginning of the source line,
209 the actual pc is printed at the beginning.
211 If SOURCE is 1, print the source line as well.
212 If SOURCE is -1, print ONLY the source line. */
215 print_stack_frame_base (struct frame_info
*fi
, int level
, int source
)
217 struct print_stack_frame_args args
;
221 args
.source
= source
;
224 catch_errors (print_stack_frame_stub
, &args
, "", RETURN_MASK_ALL
);
227 /* Show and print a stack frame briefly. FRAME_INFI should be the frame info
228 and LEVEL should be its level in the stack (or -1 for level not defined).
229 This prints the level, the function executing, the arguments,
230 and the file name and line number.
231 If the pc is not at the beginning of the source line,
232 the actual pc is printed at the beginning.
234 If SOURCE is 1, print the source line as well.
235 If SOURCE is -1, print ONLY the source line. */
238 show_and_print_stack_frame (struct frame_info
*fi
, int level
, int source
)
240 struct print_stack_frame_args args
;
244 args
.source
= source
;
247 catch_errors (show_and_print_stack_frame_stub
, &args
, "", RETURN_MASK_ALL
);
251 /* Show or print a stack frame briefly. FRAME_INFI should be the frame info
252 and LEVEL should be its level in the stack (or -1 for level not defined).
253 This prints the level, the function executing, the arguments,
254 and the file name and line number.
255 If the pc is not at the beginning of the source line,
256 the actual pc is printed at the beginning.
258 If SOURCE is 1, print the source line as well.
259 If SOURCE is -1, print ONLY the source line. */
262 print_stack_frame (struct frame_info
*fi
, int level
, int source
)
264 struct print_stack_frame_args args
;
268 args
.source
= source
;
271 catch_errors (print_stack_frame_stub
, (char *) &args
, "", RETURN_MASK_ALL
);
274 /* Print a stack frame briefly. FRAME_INFI should be the frame info
275 and LEVEL should be its level in the stack (or -1 for level not defined).
276 This prints the level, the function executing, the arguments,
277 and the file name and line number.
278 If the pc is not at the beginning of the source line,
279 the actual pc is printed at the beginning.
281 If SOURCE is 1, print the source line as well.
282 If SOURCE is -1, print ONLY the source line. */
285 print_only_stack_frame (struct frame_info
*fi
, int level
, int source
)
287 struct print_stack_frame_args args
;
291 args
.source
= source
;
294 catch_errors (print_only_stack_frame_stub
, &args
, "", RETURN_MASK_ALL
);
297 struct print_args_args
300 struct frame_info
*fi
;
301 struct ui_file
*stream
;
304 static int print_args_stub (PTR
);
306 /* Pass the args the way catch_errors wants them. */
309 print_args_stub (PTR args
)
312 struct print_args_args
*p
= (struct print_args_args
*) args
;
314 numargs
= FRAME_NUM_ARGS (p
->fi
);
315 print_frame_args (p
->func
, p
->fi
, numargs
, p
->stream
);
319 /* Print information about a frame for frame "fi" at level "level".
320 Used in "where" output, also used to emit breakpoint or step
322 LEVEL is the level of the frame, or -1 if it is the
323 innermost frame but we don't want to print the level.
324 The meaning of the SOURCE argument is:
325 SRC_LINE: Print only source line
326 LOCATION: Print only location
327 LOC_AND_SRC: Print location and source line. */
330 print_frame_info_base (struct frame_info
*fi
, int level
, int source
, int args
)
332 struct symtab_and_line sal
;
337 char buf
[MAX_REGISTER_RAW_SIZE
];
340 /* On the 68k, this spends too much time in m68k_find_saved_regs. */
342 /* Get the value of SP_REGNUM relative to the frame. */
343 get_saved_register (buf
, (int *) NULL
, (CORE_ADDR
*) NULL
,
344 FRAME_INFO_ID (fi
), SP_REGNUM
, (enum lval_type
*) NULL
);
345 sp
= extract_address (buf
, REGISTER_RAW_SIZE (SP_REGNUM
));
347 /* This is not a perfect test, because if a function alloca's some
348 memory, puts some code there, and then jumps into it, then the test
349 will succeed even though there is no call dummy. Probably best is
350 to check for a bp_call_dummy breakpoint. */
351 if (PC_IN_CALL_DUMMY (fi
->pc
, sp
, fi
->frame
))
353 if (frame_in_dummy (fi
))
356 annotate_frame_begin (level
== -1 ? 0 : level
, fi
->pc
);
358 /* Do this regardless of SOURCE because we don't have any source
359 to list for this frame. */
361 printf_filtered ("#%-2d ", level
);
362 annotate_function_call ();
363 printf_filtered ("<function called from gdb>\n");
364 annotate_frame_end ();
367 if (fi
->signal_handler_caller
)
369 annotate_frame_begin (level
== -1 ? 0 : level
, fi
->pc
);
371 /* Do this regardless of SOURCE because we don't have any source
372 to list for this frame. */
374 printf_filtered ("#%-2d ", level
);
375 annotate_signal_handler_caller ();
376 printf_filtered ("<signal handler called>\n");
377 annotate_frame_end ();
381 /* If fi is not the innermost frame, that normally means that fi->pc
382 points to *after* the call instruction, and we want to get the line
383 containing the call, never the next line. But if the next frame is
384 a signal_handler_caller or a dummy frame, then the next frame was
385 not entered as the result of a call, and we want to get the line
386 containing fi->pc. */
388 find_pc_line (fi
->pc
,
390 && !fi
->next
->signal_handler_caller
391 && !frame_in_dummy (fi
->next
));
393 location_print
= (source
== LOCATION
394 || source
== LOC_AND_ADDRESS
395 || source
== SRC_AND_LOC
);
397 if (location_print
|| !sal
.symtab
)
398 print_frame (fi
, level
, source
, args
, sal
);
400 source_print
= (source
== SRC_LINE
|| source
== SRC_AND_LOC
);
403 set_current_source_symtab_and_line (&sal
);
405 if (source_print
&& sal
.symtab
)
407 struct symtab_and_line cursal
;
409 int mid_statement
= (source
== SRC_LINE
) && (fi
->pc
!= sal
.pc
);
411 if (annotation_level
)
412 done
= identify_source_line (sal
.symtab
, sal
.line
, mid_statement
,
416 if (print_frame_info_listing_hook
)
417 print_frame_info_listing_hook (sal
.symtab
, sal
.line
, sal
.line
+ 1, 0);
420 /* We used to do this earlier, but that is clearly
421 wrong. This function is used by many different
422 parts of gdb, including normal_stop in infrun.c,
423 which uses this to print out the current PC
424 when we stepi/nexti into the middle of a source
425 line. Only the command line really wants this
426 behavior. Other UIs probably would like the
427 ability to decide for themselves if it is desired. */
428 if (addressprint
&& mid_statement
)
430 ui_out_field_core_addr (uiout
, "addr", fi
->pc
);
431 ui_out_text (uiout
, "\t");
434 print_source_lines (sal
.symtab
, sal
.line
, sal
.line
+ 1, 0);
437 /* Make sure we have at least a default source file */
438 set_default_source_symtab_and_line ();
439 cursal
= get_current_source_symtab_and_line ();
440 cursal
.line
= max (sal
.line
- get_lines_to_list () / 2, 1);
441 set_current_source_symtab_and_line (&cursal
);
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 (frame_address_in_block (fi
));
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 (frame_address_in_block (fi
));
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 (frame_address_in_block (fi
));
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 if (fi
->saved_regs
== NULL
)
938 FRAME_INIT_SAVED_REGS (fi
);
939 /* Print as much information as possible on the location of all the
950 /* The sp is special; what's displayed isn't the save address, but
951 the value of the previous frame's sp. This is a legacy thing,
952 at one stage the frame cached the previous frame's SP instead
953 of its address, hence it was easiest to just display the cached
957 /* Find out the location of the saved stack pointer with out
958 actually evaluating it. */
959 frame_register_unwind (fi
, SP_REGNUM
, &optimized
, &lval
, &addr
,
961 if (!optimized
&& lval
== not_lval
)
963 void *value
= alloca (MAX_REGISTER_RAW_SIZE
);
965 frame_register_unwind (fi
, SP_REGNUM
, &optimized
, &lval
, &addr
,
967 sp
= extract_address (value
, REGISTER_RAW_SIZE (SP_REGNUM
));
968 printf_filtered (" Previous frame's sp is ");
969 print_address_numeric (sp
, 1, gdb_stdout
);
970 printf_filtered ("\n");
973 else if (!optimized
&& lval
== lval_memory
)
975 printf_filtered (" Previous frame's sp at ");
976 print_address_numeric (addr
, 1, gdb_stdout
);
977 printf_filtered ("\n");
980 else if (!optimized
&& lval
== lval_register
)
982 printf_filtered (" Previous frame's sp in %s\n",
983 REGISTER_NAME (realnum
));
986 /* else keep quiet. */
990 numregs
= NUM_REGS
+ NUM_PSEUDO_REGS
;
991 for (i
= 0; i
< numregs
; i
++)
994 /* Find out the location of the saved register without
995 fetching the corresponding value. */
996 frame_register_unwind (fi
, i
, &optimized
, &lval
, &addr
, &realnum
,
998 /* For moment, only display registers that were saved on the
1000 if (!optimized
&& lval
== lval_memory
)
1003 puts_filtered (" Saved registers:\n ");
1005 puts_filtered (",");
1007 printf_filtered (" %s at ", REGISTER_NAME (i
));
1008 print_address_numeric (addr
, 1, gdb_stdout
);
1012 if (count
|| need_nl
)
1013 puts_filtered ("\n");
1018 /* Set a limit on the number of frames printed by default in a
1021 static int backtrace_limit
;
1024 set_backtrace_limit_command (char *count_exp
, int from_tty
)
1026 int count
= parse_and_eval_long (count_exp
);
1029 error ("Negative argument not meaningful as backtrace limit.");
1031 backtrace_limit
= count
;
1035 backtrace_limit_info (char *arg
, int from_tty
)
1038 error ("\"Info backtrace-limit\" takes no arguments.");
1040 printf_unfiltered ("Backtrace limit: %d.\n", backtrace_limit
);
1044 /* Print briefly all stack frames or just the innermost COUNT frames. */
1046 static void backtrace_command_1 (char *count_exp
, int show_locals
,
1049 backtrace_command_1 (char *count_exp
, int show_locals
, int from_tty
)
1051 struct frame_info
*fi
;
1054 register struct frame_info
*trailing
;
1055 register int trailing_level
;
1057 if (!target_has_stack
)
1058 error ("No stack.");
1060 /* The following code must do two things. First, it must
1061 set the variable TRAILING to the frame from which we should start
1062 printing. Second, it must set the variable count to the number
1063 of frames which we should print, or -1 if all of them. */
1064 trailing
= get_current_frame ();
1066 /* The target can be in a state where there is no valid frames
1067 (e.g., just connected). */
1068 if (trailing
== NULL
)
1069 error ("No stack.");
1074 count
= parse_and_eval_long (count_exp
);
1077 struct frame_info
*current
;
1082 while (current
&& count
--)
1085 current
= get_prev_frame (current
);
1088 /* Will stop when CURRENT reaches the top of the stack. TRAILING
1089 will be COUNT below it. */
1093 trailing
= get_prev_frame (trailing
);
1094 current
= get_prev_frame (current
);
1106 struct partial_symtab
*ps
;
1108 /* Read in symbols for all of the frames. Need to do this in
1109 a separate pass so that "Reading in symbols for xxx" messages
1110 don't screw up the appearance of the backtrace. Also
1111 if people have strong opinions against reading symbols for
1112 backtrace this may have to be an option. */
1116 fi
= get_prev_frame (fi
))
1119 ps
= find_pc_psymtab (frame_address_in_block (fi
));
1121 PSYMTAB_TO_SYMTAB (ps
); /* Force syms to come in */
1125 for (i
= 0, fi
= trailing
;
1127 i
++, fi
= get_prev_frame (fi
))
1131 /* Don't use print_stack_frame; if an error() occurs it probably
1132 means further attempts to backtrace would fail (on the other
1133 hand, perhaps the code does or could be fixed to make sure
1134 the frame->prev field gets set to NULL in that case). */
1135 print_frame_info_base (fi
, trailing_level
+ i
, 0, 1);
1137 print_frame_local_vars (fi
, 1, gdb_stdout
);
1140 /* If we've stopped before the end, mention that. */
1142 printf_filtered ("(More stack frames follow...)\n");
1146 backtrace_command (char *arg
, int from_tty
)
1148 struct cleanup
*old_chain
= (struct cleanup
*) NULL
;
1149 char **argv
= (char **) NULL
;
1150 int argIndicatingFullTrace
= (-1), totArgLen
= 0, argc
= 0;
1153 if (arg
!= (char *) NULL
)
1157 argv
= buildargv (arg
);
1158 old_chain
= make_cleanup_freeargv (argv
);
1160 for (i
= 0; (argv
[i
] != (char *) NULL
); i
++)
1164 for (j
= 0; (j
< strlen (argv
[i
])); j
++)
1165 argv
[i
][j
] = tolower (argv
[i
][j
]);
1167 if (argIndicatingFullTrace
< 0 && subset_compare (argv
[i
], "full"))
1168 argIndicatingFullTrace
= argc
;
1172 totArgLen
+= strlen (argv
[i
]);
1176 if (argIndicatingFullTrace
>= 0)
1180 argPtr
= (char *) xmalloc (totArgLen
+ 1);
1185 memset (argPtr
, 0, totArgLen
+ 1);
1186 for (i
= 0; (i
< (argc
+ 1)); i
++)
1188 if (i
!= argIndicatingFullTrace
)
1190 strcat (argPtr
, argv
[i
]);
1191 strcat (argPtr
, " ");
1197 argPtr
= (char *) NULL
;
1201 backtrace_command_1 (argPtr
, (argIndicatingFullTrace
>= 0), from_tty
);
1203 if (argIndicatingFullTrace
>= 0 && totArgLen
> 0)
1207 do_cleanups (old_chain
);
1210 static void backtrace_full_command (char *arg
, int from_tty
);
1212 backtrace_full_command (char *arg
, int from_tty
)
1214 backtrace_command_1 (arg
, 1, from_tty
);
1218 /* Print the local variables of a block B active in FRAME.
1219 Return 1 if any variables were printed; 0 otherwise. */
1222 print_block_frame_locals (struct block
*b
, register struct frame_info
*fi
,
1223 int num_tabs
, register struct ui_file
*stream
)
1226 register struct symbol
*sym
;
1227 register int values_printed
= 0;
1229 ALL_BLOCK_SYMBOLS (b
, i
, sym
)
1231 switch (SYMBOL_CLASS (sym
))
1238 for (j
= 0; j
< num_tabs
; j
++)
1239 fputs_filtered ("\t", stream
);
1240 fputs_filtered (SYMBOL_SOURCE_NAME (sym
), stream
);
1241 fputs_filtered (" = ", stream
);
1242 print_variable_value (sym
, fi
, stream
);
1243 fprintf_filtered (stream
, "\n");
1247 /* Ignore symbols which are not locals. */
1251 return values_printed
;
1254 /* Same, but print labels. */
1257 print_block_frame_labels (struct block
*b
, int *have_default
,
1258 register struct ui_file
*stream
)
1261 register struct symbol
*sym
;
1262 register int values_printed
= 0;
1264 ALL_BLOCK_SYMBOLS (b
, i
, sym
)
1266 if (STREQ (SYMBOL_NAME (sym
), "default"))
1272 if (SYMBOL_CLASS (sym
) == LOC_LABEL
)
1274 struct symtab_and_line sal
;
1275 sal
= find_pc_line (SYMBOL_VALUE_ADDRESS (sym
), 0);
1277 fputs_filtered (SYMBOL_SOURCE_NAME (sym
), stream
);
1280 fprintf_filtered (stream
, " ");
1281 print_address_numeric (SYMBOL_VALUE_ADDRESS (sym
), 1, stream
);
1283 fprintf_filtered (stream
, " in file %s, line %d\n",
1284 sal
.symtab
->filename
, sal
.line
);
1287 return values_printed
;
1290 /* Print on STREAM all the local variables in frame FRAME,
1291 including all the blocks active in that frame
1294 Returns 1 if the job was done,
1295 or 0 if nothing was printed because we have no info
1296 on the function running in FRAME. */
1299 print_frame_local_vars (register struct frame_info
*fi
, register int num_tabs
,
1300 register struct ui_file
*stream
)
1302 register struct block
*block
= get_frame_block (fi
, 0);
1303 register int values_printed
= 0;
1307 fprintf_filtered (stream
, "No symbol table info available.\n");
1313 if (print_block_frame_locals (block
, fi
, num_tabs
, stream
))
1315 /* After handling the function's top-level block, stop.
1316 Don't continue to its superblock, the block of
1317 per-file symbols. */
1318 if (BLOCK_FUNCTION (block
))
1320 block
= BLOCK_SUPERBLOCK (block
);
1323 if (!values_printed
)
1325 fprintf_filtered (stream
, "No locals.\n");
1329 /* Same, but print labels. */
1332 print_frame_label_vars (register struct frame_info
*fi
, int this_level_only
,
1333 register struct ui_file
*stream
)
1335 register struct blockvector
*bl
;
1336 register struct block
*block
= get_frame_block (fi
, 0);
1337 register int values_printed
= 0;
1338 int index
, have_default
= 0;
1339 char *blocks_printed
;
1340 CORE_ADDR pc
= fi
->pc
;
1344 fprintf_filtered (stream
, "No symbol table info available.\n");
1348 bl
= blockvector_for_pc (BLOCK_END (block
) - 4, &index
);
1349 blocks_printed
= (char *) alloca (BLOCKVECTOR_NBLOCKS (bl
) * sizeof (char));
1350 memset (blocks_printed
, 0, BLOCKVECTOR_NBLOCKS (bl
) * sizeof (char));
1354 CORE_ADDR end
= BLOCK_END (block
) - 4;
1357 if (bl
!= blockvector_for_pc (end
, &index
))
1358 error ("blockvector blotch");
1359 if (BLOCKVECTOR_BLOCK (bl
, index
) != block
)
1360 error ("blockvector botch");
1361 last_index
= BLOCKVECTOR_NBLOCKS (bl
);
1364 /* Don't print out blocks that have gone by. */
1365 while (index
< last_index
1366 && BLOCK_END (BLOCKVECTOR_BLOCK (bl
, index
)) < pc
)
1369 while (index
< last_index
1370 && BLOCK_END (BLOCKVECTOR_BLOCK (bl
, index
)) < end
)
1372 if (blocks_printed
[index
] == 0)
1374 if (print_block_frame_labels (BLOCKVECTOR_BLOCK (bl
, index
), &have_default
, stream
))
1376 blocks_printed
[index
] = 1;
1382 if (values_printed
&& this_level_only
)
1385 /* After handling the function's top-level block, stop.
1386 Don't continue to its superblock, the block of
1387 per-file symbols. */
1388 if (BLOCK_FUNCTION (block
))
1390 block
= BLOCK_SUPERBLOCK (block
);
1393 if (!values_printed
&& !this_level_only
)
1395 fprintf_filtered (stream
, "No catches.\n");
1401 locals_info (char *args
, int from_tty
)
1403 if (!selected_frame
)
1404 error ("No frame selected.");
1405 print_frame_local_vars (selected_frame
, 0, gdb_stdout
);
1409 catch_info (char *ignore
, int from_tty
)
1411 struct symtab_and_line
*sal
;
1413 /* Check for target support for exception handling */
1414 sal
= target_enable_exception_callback (EX_EVENT_CATCH
, 1);
1417 /* Currently not handling this */
1418 /* Ideally, here we should interact with the C++ runtime
1419 system to find the list of active handlers, etc. */
1420 fprintf_filtered (gdb_stdout
, "Info catch not supported with this target/compiler combination.\n");
1422 if (!selected_frame
)
1423 error ("No frame selected.");
1428 /* Assume g++ compiled code -- old v 4.16 behaviour */
1429 if (!selected_frame
)
1430 error ("No frame selected.");
1432 print_frame_label_vars (selected_frame
, 0, gdb_stdout
);
1437 print_frame_arg_vars (register struct frame_info
*fi
,
1438 register struct ui_file
*stream
)
1440 struct symbol
*func
= get_frame_function (fi
);
1441 register struct block
*b
;
1443 register struct symbol
*sym
, *sym2
;
1444 register int values_printed
= 0;
1448 fprintf_filtered (stream
, "No symbol table info available.\n");
1452 b
= SYMBOL_BLOCK_VALUE (func
);
1453 ALL_BLOCK_SYMBOLS (b
, i
, sym
)
1455 switch (SYMBOL_CLASS (sym
))
1461 case LOC_REGPARM_ADDR
:
1462 case LOC_BASEREG_ARG
:
1464 fputs_filtered (SYMBOL_SOURCE_NAME (sym
), stream
);
1465 fputs_filtered (" = ", stream
);
1467 /* We have to look up the symbol because arguments can have
1468 two entries (one a parameter, one a local) and the one we
1469 want is the local, which lookup_symbol will find for us.
1470 This includes gcc1 (not gcc2) on the sparc when passing a
1471 small structure and gcc2 when the argument type is float
1472 and it is passed as a double and converted to float by
1473 the prologue (in the latter case the type of the LOC_ARG
1474 symbol is double and the type of the LOC_LOCAL symbol is
1475 float). There are also LOC_ARG/LOC_REGISTER pairs which
1476 are not combined in symbol-reading. */
1478 sym2
= lookup_symbol (SYMBOL_NAME (sym
),
1479 b
, VAR_NAMESPACE
, (int *) NULL
, (struct symtab
**) NULL
);
1480 print_variable_value (sym2
, fi
, stream
);
1481 fprintf_filtered (stream
, "\n");
1485 /* Don't worry about things which aren't arguments. */
1489 if (!values_printed
)
1491 fprintf_filtered (stream
, "No arguments.\n");
1496 args_info (char *ignore
, int from_tty
)
1498 if (!selected_frame
)
1499 error ("No frame selected.");
1500 print_frame_arg_vars (selected_frame
, gdb_stdout
);
1505 args_plus_locals_info (char *ignore
, int from_tty
)
1507 args_info (ignore
, from_tty
);
1508 locals_info (ignore
, from_tty
);
1512 /* Select frame FI (or NULL - to invalidate the current frame). */
1515 select_frame (struct frame_info
*fi
)
1517 register struct symtab
*s
;
1519 selected_frame
= fi
;
1520 /* NOTE: cagney/2002-05-04: FI can be NULL. This occures when the
1521 frame is being invalidated. */
1522 if (selected_frame_level_changed_hook
)
1523 selected_frame_level_changed_hook (frame_relative_level (fi
));
1525 /* FIXME: kseitz/2002-08-28: It would be nice to call
1526 selected_frame_level_changed_event right here, but due to limitations
1527 in the current interfaces, we would end up flooding UIs with events
1528 because select_frame is used extensively internally.
1530 Once we have frame-parameterized frame (and frame-related) commands,
1531 the event notification can be moved here, since this function will only
1532 be called when the users selected frame is being changed. */
1534 /* Ensure that symbols for this frame are read in. Also, determine the
1535 source language of this frame, and switch to it if desired. */
1538 s
= find_pc_symtab (fi
->pc
);
1540 && s
->language
!= current_language
->la_language
1541 && s
->language
!= language_unknown
1542 && language_mode
== language_mode_auto
)
1544 set_language (s
->language
);
1550 /* Select frame FI. Also print the stack frame and show the source if
1551 this is the tui version. */
1553 select_and_print_frame (struct frame_info
*fi
)
1558 print_stack_frame (fi
, frame_relative_level (fi
), 1);
1562 /* Return the symbol-block in which the selected frame is executing.
1563 Can return zero under various legitimate circumstances.
1565 If ADDR_IN_BLOCK is non-zero, set *ADDR_IN_BLOCK to the relevant
1566 code address within the block returned. We use this to decide
1567 which macros are in scope. */
1570 get_selected_block (CORE_ADDR
*addr_in_block
)
1572 if (!target_has_stack
)
1575 if (!selected_frame
)
1576 return get_current_block (addr_in_block
);
1577 return get_frame_block (selected_frame
, addr_in_block
);
1580 /* Find a frame a certain number of levels away from FRAME.
1581 LEVEL_OFFSET_PTR points to an int containing the number of levels.
1582 Positive means go to earlier frames (up); negative, the reverse.
1583 The int that contains the number of levels is counted toward
1584 zero as the frames for those levels are found.
1585 If the top or bottom frame is reached, that frame is returned,
1586 but the final value of *LEVEL_OFFSET_PTR is nonzero and indicates
1587 how much farther the original request asked to go. */
1590 find_relative_frame (register struct frame_info
*frame
,
1591 register int *level_offset_ptr
)
1593 register struct frame_info
*prev
;
1594 register struct frame_info
*frame1
;
1596 /* Going up is simple: just do get_prev_frame enough times
1597 or until initial frame is reached. */
1598 while (*level_offset_ptr
> 0)
1600 prev
= get_prev_frame (frame
);
1603 (*level_offset_ptr
)--;
1606 /* Going down is just as simple. */
1607 if (*level_offset_ptr
< 0)
1609 while (*level_offset_ptr
< 0)
1611 frame1
= get_next_frame (frame
);
1615 (*level_offset_ptr
)++;
1621 /* The "select_frame" command. With no arg, NOP.
1622 With arg LEVEL_EXP, select the frame at level LEVEL if it is a
1623 valid level. Otherwise, treat level_exp as an address expression
1624 and select it. See parse_frame_specification for more info on proper
1625 frame expressions. */
1629 select_frame_command_wrapper (char *level_exp
, int from_tty
)
1631 select_frame_command (level_exp
, from_tty
);
1635 select_frame_command (char *level_exp
, int from_tty
)
1637 struct frame_info
*frame
;
1638 int level
= frame_relative_level (selected_frame
);
1640 if (!target_has_stack
)
1641 error ("No stack.");
1643 frame
= parse_frame_specification (level_exp
);
1645 select_frame (frame
);
1646 if (level
!= frame_relative_level (selected_frame
))
1647 selected_frame_level_changed_event (frame_relative_level (selected_frame
));
1650 /* The "frame" command. With no arg, print selected frame briefly.
1651 With arg, behaves like select_frame and then prints the selected
1655 frame_command (char *level_exp
, int from_tty
)
1657 select_frame_command (level_exp
, from_tty
);
1658 show_and_print_stack_frame (selected_frame
,
1659 frame_relative_level (selected_frame
), 1);
1662 /* The XDB Compatibility command to print the current frame. */
1665 current_frame_command (char *level_exp
, int from_tty
)
1667 if (target_has_stack
== 0 || selected_frame
== 0)
1668 error ("No stack.");
1669 print_only_stack_frame (selected_frame
,
1670 frame_relative_level (selected_frame
), 1);
1673 /* Select the frame up one or COUNT stack levels
1674 from the previously selected frame, and print it briefly. */
1678 up_silently_base (char *count_exp
)
1680 register struct frame_info
*fi
;
1681 int count
= 1, count1
;
1683 count
= parse_and_eval_long (count_exp
);
1686 if (target_has_stack
== 0 || selected_frame
== 0)
1687 error ("No stack.");
1689 fi
= find_relative_frame (selected_frame
, &count1
);
1690 if (count1
!= 0 && count_exp
== 0)
1691 error ("Initial frame selected; you cannot go up.");
1693 selected_frame_level_changed_event (frame_relative_level (selected_frame
));
1697 up_silently_command (char *count_exp
, int from_tty
)
1699 up_silently_base (count_exp
);
1703 up_command (char *count_exp
, int from_tty
)
1705 up_silently_base (count_exp
);
1706 show_and_print_stack_frame (selected_frame
,
1707 frame_relative_level (selected_frame
), 1);
1710 /* Select the frame down one or COUNT stack levels
1711 from the previously selected frame, and print it briefly. */
1715 down_silently_base (char *count_exp
)
1717 register struct frame_info
*frame
;
1718 int count
= -1, count1
;
1720 count
= -parse_and_eval_long (count_exp
);
1723 if (target_has_stack
== 0 || selected_frame
== 0)
1724 error ("No stack.");
1726 frame
= find_relative_frame (selected_frame
, &count1
);
1727 if (count1
!= 0 && count_exp
== 0)
1730 /* We only do this if count_exp is not specified. That way "down"
1731 means to really go down (and let me know if that is
1732 impossible), but "down 9999" can be used to mean go all the way
1733 down without getting an error. */
1735 error ("Bottom (i.e., innermost) frame selected; you cannot go down.");
1738 select_frame (frame
);
1739 selected_frame_level_changed_event (frame_relative_level (selected_frame
));
1744 down_silently_command (char *count_exp
, int from_tty
)
1746 down_silently_base (count_exp
);
1750 down_command (char *count_exp
, int from_tty
)
1752 down_silently_base (count_exp
);
1753 show_and_print_stack_frame (selected_frame
,
1754 frame_relative_level (selected_frame
), 1);
1758 return_command_wrapper (char *retval_exp
, int from_tty
)
1760 return_command (retval_exp
, from_tty
);
1764 return_command (char *retval_exp
, int from_tty
)
1766 struct symbol
*thisfun
;
1767 CORE_ADDR selected_frame_addr
;
1768 CORE_ADDR selected_frame_pc
;
1769 struct frame_info
*frame
;
1770 struct value
*return_value
= NULL
;
1772 if (selected_frame
== NULL
)
1773 error ("No selected frame.");
1774 thisfun
= get_frame_function (selected_frame
);
1775 selected_frame_addr
= FRAME_FP (selected_frame
);
1776 selected_frame_pc
= selected_frame
->pc
;
1778 /* Compute the return value (if any -- possibly getting errors here). */
1782 struct type
*return_type
= NULL
;
1784 return_value
= parse_and_eval (retval_exp
);
1786 /* Cast return value to the return type of the function. */
1787 if (thisfun
!= NULL
)
1788 return_type
= TYPE_TARGET_TYPE (SYMBOL_TYPE (thisfun
));
1789 if (return_type
== NULL
)
1790 return_type
= builtin_type_int
;
1791 return_value
= value_cast (return_type
, return_value
);
1793 /* Make sure we have fully evaluated it, since
1794 it might live in the stack frame we're about to pop. */
1795 if (VALUE_LAZY (return_value
))
1796 value_fetch_lazy (return_value
);
1799 /* If interactive, require confirmation. */
1805 if (!query ("Make %s return now? ", SYMBOL_SOURCE_NAME (thisfun
)))
1807 error ("Not confirmed.");
1811 else if (!query ("Make selected stack frame return now? "))
1812 error ("Not confirmed.");
1815 /* Do the real work. Pop until the specified frame is current. We
1816 use this method because the selected_frame is not valid after
1817 a POP_FRAME. The pc comparison makes this work even if the
1818 selected frame shares its fp with another frame. */
1820 while (selected_frame_addr
!= (frame
= get_current_frame ())->frame
1821 || selected_frame_pc
!= frame
->pc
)
1824 /* Then pop that frame. */
1828 /* Compute the return value (if any) and store in the place
1829 for return values. */
1832 set_return_value (return_value
);
1834 /* If we are at the end of a call dummy now, pop the dummy frame too. */
1836 if (CALL_DUMMY_HAS_COMPLETED (read_pc(), read_sp (),
1837 FRAME_FP (get_current_frame ())))
1840 /* If interactive, print the frame that is now current. */
1843 frame_command ("0", 1);
1845 select_frame_command ("0", 0);
1848 /* Sets the scope to input function name, provided that the
1849 function is within the current stack frame */
1851 struct function_bounds
1853 CORE_ADDR low
, high
;
1856 static void func_command (char *arg
, int from_tty
);
1858 func_command (char *arg
, int from_tty
)
1860 struct frame_info
*fp
;
1862 struct symtabs_and_lines sals
;
1865 struct function_bounds
*func_bounds
= (struct function_bounds
*) NULL
;
1867 if (arg
!= (char *) NULL
)
1870 fp
= parse_frame_specification ("0");
1871 sals
= decode_line_spec (arg
, 1);
1872 func_bounds
= (struct function_bounds
*) xmalloc (
1873 sizeof (struct function_bounds
) * sals
.nelts
);
1874 for (i
= 0; (i
< sals
.nelts
&& !found
); i
++)
1876 if (sals
.sals
[i
].pc
== (CORE_ADDR
) 0 ||
1877 find_pc_partial_function (sals
.sals
[i
].pc
,
1879 &func_bounds
[i
].low
,
1880 &func_bounds
[i
].high
) == 0)
1882 func_bounds
[i
].low
=
1883 func_bounds
[i
].high
= (CORE_ADDR
) NULL
;
1889 for (i
= 0; (i
< sals
.nelts
&& !found
); i
++)
1890 found
= (fp
->pc
>= func_bounds
[i
].low
&&
1891 fp
->pc
< func_bounds
[i
].high
);
1895 fp
= find_relative_frame (fp
, &level
);
1898 while (!found
&& level
== 0);
1901 xfree (func_bounds
);
1904 printf_filtered ("'%s' not within current stack frame.\n", arg
);
1905 else if (fp
!= selected_frame
)
1906 select_and_print_frame (fp
);
1909 /* Gets the language of the current frame. */
1912 get_frame_language (void)
1914 register struct symtab
*s
;
1915 enum language flang
; /* The language of the current frame */
1919 s
= find_pc_symtab (selected_frame
->pc
);
1921 flang
= s
->language
;
1923 flang
= language_unknown
;
1926 flang
= language_unknown
;
1932 _initialize_stack (void)
1935 backtrace_limit
= 30;
1938 add_com ("return", class_stack
, return_command
,
1939 "Make selected stack frame return to its caller.\n\
1940 Control remains in the debugger, but when you continue\n\
1941 execution will resume in the frame above the one now selected.\n\
1942 If an argument is given, it is an expression for the value to return.");
1944 add_com ("up", class_stack
, up_command
,
1945 "Select and print stack frame that called this one.\n\
1946 An argument says how many frames up to go.");
1947 add_com ("up-silently", class_support
, up_silently_command
,
1948 "Same as the `up' command, but does not print anything.\n\
1949 This is useful in command scripts.");
1951 add_com ("down", class_stack
, down_command
,
1952 "Select and print stack frame called by this one.\n\
1953 An argument says how many frames down to go.");
1954 add_com_alias ("do", "down", class_stack
, 1);
1955 add_com_alias ("dow", "down", class_stack
, 1);
1956 add_com ("down-silently", class_support
, down_silently_command
,
1957 "Same as the `down' command, but does not print anything.\n\
1958 This is useful in command scripts.");
1960 add_com ("frame", class_stack
, frame_command
,
1961 "Select and print a stack frame.\n\
1962 With no argument, print the selected stack frame. (See also \"info frame\").\n\
1963 An argument specifies the frame to select.\n\
1964 It can be a stack frame number or the address of the frame.\n\
1965 With argument, nothing is printed if input is coming from\n\
1966 a command file or a user-defined command.");
1968 add_com_alias ("f", "frame", class_stack
, 1);
1972 add_com ("L", class_stack
, current_frame_command
,
1973 "Print the current stack frame.\n");
1974 add_com_alias ("V", "frame", class_stack
, 1);
1976 add_com ("select-frame", class_stack
, select_frame_command
,
1977 "Select a stack frame without printing anything.\n\
1978 An argument specifies the frame to select.\n\
1979 It can be a stack frame number or the address of the frame.\n");
1981 add_com ("backtrace", class_stack
, backtrace_command
,
1982 "Print backtrace of all stack frames, or innermost COUNT frames.\n\
1983 With a negative argument, print outermost -COUNT frames.\n\
1984 Use of the 'full' qualifier also prints the values of the local variables.\n");
1985 add_com_alias ("bt", "backtrace", class_stack
, 0);
1988 add_com_alias ("t", "backtrace", class_stack
, 0);
1989 add_com ("T", class_stack
, backtrace_full_command
,
1990 "Print backtrace of all stack frames, or innermost COUNT frames \n\
1991 and the values of the local variables.\n\
1992 With a negative argument, print outermost -COUNT frames.\n\
1993 Usage: T <count>\n");
1996 add_com_alias ("where", "backtrace", class_alias
, 0);
1997 add_info ("stack", backtrace_command
,
1998 "Backtrace of the stack, or innermost COUNT frames.");
1999 add_info_alias ("s", "stack", 1);
2000 add_info ("frame", frame_info
,
2001 "All about selected stack frame, or frame at ADDR.");
2002 add_info_alias ("f", "frame", 1);
2003 add_info ("locals", locals_info
,
2004 "Local variables of current stack frame.");
2005 add_info ("args", args_info
,
2006 "Argument variables of current stack frame.");
2008 add_com ("l", class_info
, args_plus_locals_info
,
2009 "Argument and local variables of current stack frame.");
2012 add_com ("func", class_stack
, func_command
,
2013 "Select the stack frame that contains <func>.\nUsage: func <name>\n");
2015 add_info ("catch", catch_info
,
2016 "Exceptions that can be caught in the current stack frame.");
2019 add_cmd ("backtrace-limit", class_stack
, set_backtrace_limit_command
,
2020 "Specify maximum number of frames for \"backtrace\" to print by default.",
2022 add_info ("backtrace-limit", backtrace_limit_info
,
2023 "The maximum number of frames for \"backtrace\" to print by default.");