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 /* 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
);
402 if (source_print
&& sal
.symtab
)
405 int mid_statement
= (source
== SRC_LINE
) && (fi
->pc
!= sal
.pc
);
407 if (annotation_level
)
408 done
= identify_source_line (sal
.symtab
, sal
.line
, mid_statement
,
412 if (print_frame_info_listing_hook
)
414 print_frame_info_listing_hook (sal
.symtab
, sal
.line
, sal
.line
+ 1, 0);
415 current_source_symtab
= sal
.symtab
;
419 /* We used to do this earlier, but that is clearly
420 wrong. This function is used by many different
421 parts of gdb, including normal_stop in infrun.c,
422 which uses this to print out the current PC
423 when we stepi/nexti into the middle of a source
424 line. Only the command line really wants this
425 behavior. Other UIs probably would like the
426 ability to decide for themselves if it is desired. */
427 if (addressprint
&& mid_statement
)
429 ui_out_field_core_addr (uiout
, "addr", fi
->pc
);
430 ui_out_text (uiout
, "\t");
433 print_source_lines (sal
.symtab
, sal
.line
, sal
.line
+ 1, 0);
436 current_source_line
= max (sal
.line
- lines_to_list
/ 2, 1);
440 set_default_breakpoint (1, fi
->pc
, sal
.symtab
, sal
.line
);
442 annotate_frame_end ();
444 gdb_flush (gdb_stdout
);
448 print_frame (struct frame_info
*fi
,
452 struct symtab_and_line sal
)
455 register char *funname
= 0;
456 enum language funlang
= language_unknown
;
457 struct ui_stream
*stb
;
458 struct cleanup
*old_chain
;
459 struct cleanup
*list_chain
;
461 stb
= ui_out_stream_new (uiout
);
462 old_chain
= make_cleanup_ui_out_stream_delete (stb
);
464 func
= find_pc_function (fi
->pc
);
467 /* In certain pathological cases, the symtabs give the wrong
468 function (when we are in the first function in a file which
469 is compiled without debugging symbols, the previous function
470 is compiled with debugging symbols, and the "foo.o" symbol
471 that is supposed to tell us where the file with debugging symbols
472 ends has been truncated by ar because it is longer than 15
473 characters). This also occurs if the user uses asm() to create
474 a function but not stabs for it (in a file compiled -g).
476 So look in the minimal symbol tables as well, and if it comes
477 up with a larger address for the function use that instead.
478 I don't think this can ever cause any problems; there shouldn't
479 be any minimal symbols in the middle of a function; if this is
480 ever changed many parts of GDB will need to be changed (and we'll
481 create a find_pc_minimal_function or some such). */
483 struct minimal_symbol
*msymbol
= lookup_minimal_symbol_by_pc (fi
->pc
);
485 && (SYMBOL_VALUE_ADDRESS (msymbol
)
486 > BLOCK_START (SYMBOL_BLOCK_VALUE (func
))))
489 /* There is no particular reason to think the line number
490 information is wrong. Someone might have just put in
491 a label with asm() but left the line numbers alone. */
492 /* In this case we have no way of knowing the source file
493 and line number, so don't print them. */
496 /* We also don't know anything about the function besides
497 its address and name. */
499 funname
= SYMBOL_NAME (msymbol
);
500 funlang
= SYMBOL_LANGUAGE (msymbol
);
504 /* I'd like to use SYMBOL_SOURCE_NAME() here, to display the
505 demangled name that we already have stored in the symbol
506 table, but we stored a version with DMGL_PARAMS turned
507 on, and here we don't want to display parameters. So call
508 the demangler again, with DMGL_ANSI only. (Yes, I know
509 that printf_symbol_filtered() will again try to demangle
510 the name on the fly, but the issue is that if
511 cplus_demangle() fails here, it'll fail there too. So we
512 want to catch the failure ("demangled==NULL" case below)
513 here, while we still have our hands on the function
516 funname
= SYMBOL_NAME (func
);
517 funlang
= SYMBOL_LANGUAGE (func
);
518 if (funlang
== language_cplus
)
520 demangled
= cplus_demangle (funname
, DMGL_ANSI
);
521 if (demangled
== NULL
)
522 /* If the demangler fails, try the demangled name from
523 the symbol table. This'll have parameters, but
524 that's preferable to diplaying a mangled name. */
525 funname
= SYMBOL_SOURCE_NAME (func
);
531 struct minimal_symbol
*msymbol
= lookup_minimal_symbol_by_pc (fi
->pc
);
534 funname
= SYMBOL_NAME (msymbol
);
535 funlang
= SYMBOL_LANGUAGE (msymbol
);
539 annotate_frame_begin (level
== -1 ? 0 : level
, fi
->pc
);
541 list_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "frame");
545 ui_out_text (uiout
, "#");
546 ui_out_field_fmt (uiout
, "level", "%-2d", level
);
547 ui_out_spaces (uiout
, 1);
550 if (fi
->pc
!= sal
.pc
|| !sal
.symtab
|| source
== LOC_AND_ADDRESS
)
552 annotate_frame_address ();
553 ui_out_field_core_addr (uiout
, "addr", fi
->pc
);
554 annotate_frame_address_end ();
555 ui_out_text (uiout
, " in ");
557 annotate_frame_function_name ();
558 fprintf_symbol_filtered (stb
->stream
, funname
? funname
: "??", funlang
,
560 ui_out_field_stream (uiout
, "func", stb
);
561 ui_out_wrap_hint (uiout
, " ");
562 annotate_frame_args ();
564 ui_out_text (uiout
, " (");
567 struct print_args_args args
;
568 struct cleanup
*args_list_chain
;
571 args
.stream
= gdb_stdout
;
572 args_list_chain
= make_cleanup_ui_out_list_begin_end (uiout
, "args");
573 catch_errors (print_args_stub
, &args
, "", RETURN_MASK_ALL
);
574 /* FIXME: args must be a list. If one argument is a string it will
575 have " that will not be properly escaped. */
576 /* Invoke ui_out_tuple_end. */
577 do_cleanups (args_list_chain
);
580 ui_out_text (uiout
, ")");
581 if (sal
.symtab
&& sal
.symtab
->filename
)
583 annotate_frame_source_begin ();
584 ui_out_wrap_hint (uiout
, " ");
585 ui_out_text (uiout
, " at ");
586 annotate_frame_source_file ();
587 ui_out_field_string (uiout
, "file", sal
.symtab
->filename
);
588 annotate_frame_source_file_end ();
589 ui_out_text (uiout
, ":");
590 annotate_frame_source_line ();
591 ui_out_field_int (uiout
, "line", sal
.line
);
592 annotate_frame_source_end ();
596 if (!funname
|| (!sal
.symtab
|| !sal
.symtab
->filename
))
598 char *lib
= PC_SOLIB (fi
->pc
);
601 annotate_frame_where ();
602 ui_out_wrap_hint (uiout
, " ");
603 ui_out_text (uiout
, " from ");
604 ui_out_field_string (uiout
, "from", lib
);
607 #endif /* PC_SOLIB */
609 /* do_cleanups will call ui_out_tuple_end() for us. */
610 do_cleanups (list_chain
);
611 ui_out_text (uiout
, "\n");
612 do_cleanups (old_chain
);
616 /* Show or print the frame info. If this is the tui, it will be shown in
617 the source display */
619 print_frame_info (struct frame_info
*fi
, register int level
, int source
,
622 print_frame_info_base (fi
, level
, source
, args
);
625 /* Show the frame info. If this is the tui, it will be shown in
626 the source display otherwise, nothing is done */
628 show_stack_frame (struct frame_info
*fi
)
633 /* Read a frame specification in whatever the appropriate format is.
634 Call error() if the specification is in any way invalid (i.e.
635 this function never returns NULL). */
638 parse_frame_specification (char *frame_exp
)
642 CORE_ADDR args
[MAXARGS
];
647 char *addr_string
, *p
;
648 struct cleanup
*tmp_cleanup
;
650 while (*frame_exp
== ' ')
655 if (numargs
> MAXARGS
)
656 error ("Too many args in frame specification");
657 /* Parse an argument. */
658 for (p
= frame_exp
; *p
&& *p
!= ' '; p
++)
660 addr_string
= savestring (frame_exp
, p
- frame_exp
);
665 tmp_cleanup
= make_cleanup (xfree
, addr_string
);
667 /* NOTE: we call parse_and_eval and then both
668 value_as_long and value_as_address rather than calling
669 parse_and_eval_long and parse_and_eval_address because
670 of the issue of potential side effects from evaluating
672 vp
= parse_and_eval (addr_string
);
674 level
= value_as_long (vp
);
676 args
[numargs
++] = value_as_address (vp
);
677 do_cleanups (tmp_cleanup
);
680 /* Skip spaces, move to possible next arg. */
690 if (selected_frame
== NULL
)
691 error ("No selected frame.");
692 return selected_frame
;
696 struct frame_info
*fid
=
697 find_relative_frame (get_current_frame (), &level
);
698 struct frame_info
*tfid
;
701 /* find_relative_frame was successful */
704 /* If SETUP_ARBITRARY_FRAME is defined, then frame specifications
705 take at least 2 addresses. It is important to detect this case
706 here so that "frame 100" does not give a confusing error message
707 like "frame specification requires two addresses". This of course
708 does not solve the "frame 100" problem for machines on which
709 a frame specification can be made with one address. To solve
710 that, we need a new syntax for a specifying a frame by address.
711 I think the cleanest syntax is $frame(0x45) ($frame(0x23,0x45) for
712 two args, etc.), but people might think that is too much typing,
713 so I guess *0x23,0x45 would be a possible alternative (commas
714 really should be used instead of spaces to delimit; using spaces
715 normally works in an expression). */
716 #ifdef SETUP_ARBITRARY_FRAME
717 error ("No frame %s", paddr_d (args
[0]));
720 /* If (s)he specifies the frame with an address, he deserves what
721 (s)he gets. Still, give the highest one that matches. */
723 for (fid
= get_current_frame ();
724 fid
&& fid
->frame
!= args
[0];
725 fid
= get_prev_frame (fid
))
729 while ((tfid
= get_prev_frame (fid
)) &&
730 (tfid
->frame
== args
[0]))
733 /* We couldn't identify the frame as an existing frame, but
734 perhaps we can create one with a single argument. */
738 #ifdef SETUP_ARBITRARY_FRAME
739 return SETUP_ARBITRARY_FRAME (numargs
, args
);
741 /* Usual case. Do it here rather than have everyone supply
742 a SETUP_ARBITRARY_FRAME that does this. */
744 return create_new_frame (args
[0], 0);
745 error ("Too many args in frame specification");
752 /* FRAME_ARGS_ADDRESS_CORRECT is just like FRAME_ARGS_ADDRESS except
753 that if it is unsure about the answer, it returns 0
754 instead of guessing (this happens on the VAX and i960, for example).
756 On most machines, we never have to guess about the args address,
757 so FRAME_ARGS_ADDRESS{,_CORRECT} are the same. */
758 #if !defined (FRAME_ARGS_ADDRESS_CORRECT)
759 #define FRAME_ARGS_ADDRESS_CORRECT FRAME_ARGS_ADDRESS
762 /* Print verbosely the selected frame or the frame at address ADDR.
763 This means absolutely all information in the frame is printed. */
766 frame_info (char *addr_exp
, int from_tty
)
768 struct frame_info
*fi
;
769 struct symtab_and_line sal
;
772 struct frame_info
*calling_frame_info
;
773 int i
, count
, numregs
;
775 enum language funlang
= language_unknown
;
777 if (!target_has_stack
)
780 fi
= parse_frame_specification (addr_exp
);
782 error ("Invalid frame specified.");
784 sal
= find_pc_line (fi
->pc
,
786 && !fi
->next
->signal_handler_caller
787 && !frame_in_dummy (fi
->next
));
788 func
= get_frame_function (fi
);
789 s
= find_pc_symtab (fi
->pc
);
792 /* I'd like to use SYMBOL_SOURCE_NAME() here, to display
793 * the demangled name that we already have stored in
794 * the symbol table, but we stored a version with
795 * DMGL_PARAMS turned on, and here we don't want
796 * to display parameters. So call the demangler again,
797 * with DMGL_ANSI only. RT
798 * (Yes, I know that printf_symbol_filtered() will
799 * again try to demangle the name on the fly, but
800 * the issue is that if cplus_demangle() fails here,
801 * it'll fail there too. So we want to catch the failure
802 * ("demangled==NULL" case below) here, while we still
803 * have our hands on the function symbol.)
806 funname
= SYMBOL_NAME (func
);
807 funlang
= SYMBOL_LANGUAGE (func
);
808 if (funlang
== language_cplus
)
810 demangled
= cplus_demangle (funname
, DMGL_ANSI
);
811 /* If the demangler fails, try the demangled name
812 * from the symbol table. This'll have parameters,
813 * but that's preferable to diplaying a mangled name.
815 if (demangled
== NULL
)
816 funname
= SYMBOL_SOURCE_NAME (func
);
821 register struct minimal_symbol
*msymbol
= lookup_minimal_symbol_by_pc (fi
->pc
);
824 funname
= SYMBOL_NAME (msymbol
);
825 funlang
= SYMBOL_LANGUAGE (msymbol
);
828 calling_frame_info
= get_prev_frame (fi
);
830 if (!addr_exp
&& frame_relative_level (selected_frame
) >= 0)
832 printf_filtered ("Stack level %d, frame at ",
833 frame_relative_level (selected_frame
));
834 print_address_numeric (fi
->frame
, 1, gdb_stdout
);
835 printf_filtered (":\n");
839 printf_filtered ("Stack frame at ");
840 print_address_numeric (fi
->frame
, 1, gdb_stdout
);
841 printf_filtered (":\n");
843 printf_filtered (" %s = ", REGISTER_NAME (PC_REGNUM
));
844 print_address_numeric (fi
->pc
, 1, gdb_stdout
);
849 printf_filtered (" in ");
850 fprintf_symbol_filtered (gdb_stdout
, funname
, funlang
,
851 DMGL_ANSI
| DMGL_PARAMS
);
855 printf_filtered (" (%s:%d)", sal
.symtab
->filename
, sal
.line
);
856 puts_filtered ("; ");
858 printf_filtered ("saved %s ", REGISTER_NAME (PC_REGNUM
));
859 print_address_numeric (FRAME_SAVED_PC (fi
), 1, gdb_stdout
);
860 printf_filtered ("\n");
864 frameless
= FRAMELESS_FUNCTION_INVOCATION (fi
);
866 printf_filtered (" (FRAMELESS),");
869 if (calling_frame_info
)
871 printf_filtered (" called by frame at ");
872 print_address_numeric (calling_frame_info
->frame
, 1, gdb_stdout
);
874 if (fi
->next
&& calling_frame_info
)
879 printf_filtered (" caller of frame at ");
880 print_address_numeric (fi
->next
->frame
, 1, gdb_stdout
);
882 if (fi
->next
|| calling_frame_info
)
883 puts_filtered ("\n");
885 printf_filtered (" source language %s.\n", language_str (s
->language
));
887 #ifdef PRINT_EXTRA_FRAME_INFO
888 PRINT_EXTRA_FRAME_INFO (fi
);
892 /* Address of the argument list for this frame, or 0. */
893 CORE_ADDR arg_list
= FRAME_ARGS_ADDRESS_CORRECT (fi
);
894 /* Number of args for this frame, or -1 if unknown. */
898 printf_filtered (" Arglist at unknown address.\n");
901 printf_filtered (" Arglist at ");
902 print_address_numeric (arg_list
, 1, gdb_stdout
);
903 printf_filtered (",");
905 numargs
= FRAME_NUM_ARGS (fi
);
907 puts_filtered (" args: ");
908 else if (numargs
== 0)
909 puts_filtered (" no args.");
910 else if (numargs
== 1)
911 puts_filtered (" 1 arg: ");
913 printf_filtered (" %d args: ", numargs
);
914 print_frame_args (func
, fi
, numargs
, gdb_stdout
);
915 puts_filtered ("\n");
919 /* Address of the local variables for this frame, or 0. */
920 CORE_ADDR arg_list
= FRAME_LOCALS_ADDRESS (fi
);
923 printf_filtered (" Locals at unknown address,");
926 printf_filtered (" Locals at ");
927 print_address_numeric (arg_list
, 1, gdb_stdout
);
928 printf_filtered (",");
932 FRAME_INIT_SAVED_REGS (fi
);
933 if (fi
->saved_regs
!= NULL
)
935 /* The sp is special; what's returned isn't the save address, but
936 actually the value of the previous frame's sp. */
937 printf_filtered (" Previous frame's sp is ");
938 print_address_numeric (fi
->saved_regs
[SP_REGNUM
], 1, gdb_stdout
);
939 printf_filtered ("\n");
941 numregs
= NUM_REGS
+ NUM_PSEUDO_REGS
;
942 for (i
= 0; i
< numregs
; i
++)
943 if (fi
->saved_regs
[i
] && i
!= SP_REGNUM
)
946 puts_filtered (" Saved registers:\n ");
950 printf_filtered (" %s at ", REGISTER_NAME (i
));
951 print_address_numeric (fi
->saved_regs
[i
], 1, gdb_stdout
);
955 puts_filtered ("\n");
959 /* We could get some information about saved registers by
960 calling get_saved_register on each register. Which info goes
961 with which frame is necessarily lost, however, and I suspect
962 that the users don't care whether they get the info. */
963 puts_filtered ("\n");
968 /* Set a limit on the number of frames printed by default in a
971 static int backtrace_limit
;
974 set_backtrace_limit_command (char *count_exp
, int from_tty
)
976 int count
= parse_and_eval_long (count_exp
);
979 error ("Negative argument not meaningful as backtrace limit.");
981 backtrace_limit
= count
;
985 backtrace_limit_info (char *arg
, int from_tty
)
988 error ("\"Info backtrace-limit\" takes no arguments.");
990 printf_unfiltered ("Backtrace limit: %d.\n", backtrace_limit
);
994 /* Print briefly all stack frames or just the innermost COUNT frames. */
996 static void backtrace_command_1 (char *count_exp
, int show_locals
,
999 backtrace_command_1 (char *count_exp
, int show_locals
, int from_tty
)
1001 struct frame_info
*fi
;
1004 register struct frame_info
*trailing
;
1005 register int trailing_level
;
1007 if (!target_has_stack
)
1008 error ("No stack.");
1010 /* The following code must do two things. First, it must
1011 set the variable TRAILING to the frame from which we should start
1012 printing. Second, it must set the variable count to the number
1013 of frames which we should print, or -1 if all of them. */
1014 trailing
= get_current_frame ();
1016 /* The target can be in a state where there is no valid frames
1017 (e.g., just connected). */
1018 if (trailing
== NULL
)
1019 error ("No stack.");
1024 count
= parse_and_eval_long (count_exp
);
1027 struct frame_info
*current
;
1032 while (current
&& count
--)
1035 current
= get_prev_frame (current
);
1038 /* Will stop when CURRENT reaches the top of the stack. TRAILING
1039 will be COUNT below it. */
1043 trailing
= get_prev_frame (trailing
);
1044 current
= get_prev_frame (current
);
1056 struct partial_symtab
*ps
;
1058 /* Read in symbols for all of the frames. Need to do this in
1059 a separate pass so that "Reading in symbols for xxx" messages
1060 don't screw up the appearance of the backtrace. Also
1061 if people have strong opinions against reading symbols for
1062 backtrace this may have to be an option. */
1066 fi
= get_prev_frame (fi
))
1069 ps
= find_pc_psymtab (fi
->pc
);
1071 PSYMTAB_TO_SYMTAB (ps
); /* Force syms to come in */
1075 for (i
= 0, fi
= trailing
;
1077 i
++, fi
= get_prev_frame (fi
))
1081 /* Don't use print_stack_frame; if an error() occurs it probably
1082 means further attempts to backtrace would fail (on the other
1083 hand, perhaps the code does or could be fixed to make sure
1084 the frame->prev field gets set to NULL in that case). */
1085 print_frame_info_base (fi
, trailing_level
+ i
, 0, 1);
1087 print_frame_local_vars (fi
, 1, gdb_stdout
);
1090 /* If we've stopped before the end, mention that. */
1092 printf_filtered ("(More stack frames follow...)\n");
1096 backtrace_command (char *arg
, int from_tty
)
1098 struct cleanup
*old_chain
= (struct cleanup
*) NULL
;
1099 char **argv
= (char **) NULL
;
1100 int argIndicatingFullTrace
= (-1), totArgLen
= 0, argc
= 0;
1103 if (arg
!= (char *) NULL
)
1107 argv
= buildargv (arg
);
1108 old_chain
= make_cleanup_freeargv (argv
);
1110 for (i
= 0; (argv
[i
] != (char *) NULL
); i
++)
1114 for (j
= 0; (j
< strlen (argv
[i
])); j
++)
1115 argv
[i
][j
] = tolower (argv
[i
][j
]);
1117 if (argIndicatingFullTrace
< 0 && subset_compare (argv
[i
], "full"))
1118 argIndicatingFullTrace
= argc
;
1122 totArgLen
+= strlen (argv
[i
]);
1126 if (argIndicatingFullTrace
>= 0)
1130 argPtr
= (char *) xmalloc (totArgLen
+ 1);
1135 memset (argPtr
, 0, totArgLen
+ 1);
1136 for (i
= 0; (i
< (argc
+ 1)); i
++)
1138 if (i
!= argIndicatingFullTrace
)
1140 strcat (argPtr
, argv
[i
]);
1141 strcat (argPtr
, " ");
1147 argPtr
= (char *) NULL
;
1151 backtrace_command_1 (argPtr
, (argIndicatingFullTrace
>= 0), from_tty
);
1153 if (argIndicatingFullTrace
>= 0 && totArgLen
> 0)
1157 do_cleanups (old_chain
);
1160 static void backtrace_full_command (char *arg
, int from_tty
);
1162 backtrace_full_command (char *arg
, int from_tty
)
1164 backtrace_command_1 (arg
, 1, from_tty
);
1168 /* Print the local variables of a block B active in FRAME.
1169 Return 1 if any variables were printed; 0 otherwise. */
1172 print_block_frame_locals (struct block
*b
, register struct frame_info
*fi
,
1173 int num_tabs
, register struct ui_file
*stream
)
1176 register struct symbol
*sym
;
1177 register int values_printed
= 0;
1179 ALL_BLOCK_SYMBOLS (b
, i
, sym
)
1181 switch (SYMBOL_CLASS (sym
))
1188 for (j
= 0; j
< num_tabs
; j
++)
1189 fputs_filtered ("\t", stream
);
1190 fputs_filtered (SYMBOL_SOURCE_NAME (sym
), stream
);
1191 fputs_filtered (" = ", stream
);
1192 print_variable_value (sym
, fi
, stream
);
1193 fprintf_filtered (stream
, "\n");
1197 /* Ignore symbols which are not locals. */
1201 return values_printed
;
1204 /* Same, but print labels. */
1207 print_block_frame_labels (struct block
*b
, int *have_default
,
1208 register struct ui_file
*stream
)
1211 register struct symbol
*sym
;
1212 register int values_printed
= 0;
1214 ALL_BLOCK_SYMBOLS (b
, i
, sym
)
1216 if (STREQ (SYMBOL_NAME (sym
), "default"))
1222 if (SYMBOL_CLASS (sym
) == LOC_LABEL
)
1224 struct symtab_and_line sal
;
1225 sal
= find_pc_line (SYMBOL_VALUE_ADDRESS (sym
), 0);
1227 fputs_filtered (SYMBOL_SOURCE_NAME (sym
), stream
);
1230 fprintf_filtered (stream
, " ");
1231 print_address_numeric (SYMBOL_VALUE_ADDRESS (sym
), 1, stream
);
1233 fprintf_filtered (stream
, " in file %s, line %d\n",
1234 sal
.symtab
->filename
, sal
.line
);
1237 return values_printed
;
1240 /* Print on STREAM all the local variables in frame FRAME,
1241 including all the blocks active in that frame
1244 Returns 1 if the job was done,
1245 or 0 if nothing was printed because we have no info
1246 on the function running in FRAME. */
1249 print_frame_local_vars (register struct frame_info
*fi
, register int num_tabs
,
1250 register struct ui_file
*stream
)
1252 register struct block
*block
= get_frame_block (fi
, 0);
1253 register int values_printed
= 0;
1257 fprintf_filtered (stream
, "No symbol table info available.\n");
1263 if (print_block_frame_locals (block
, fi
, num_tabs
, stream
))
1265 /* After handling the function's top-level block, stop.
1266 Don't continue to its superblock, the block of
1267 per-file symbols. */
1268 if (BLOCK_FUNCTION (block
))
1270 block
= BLOCK_SUPERBLOCK (block
);
1273 if (!values_printed
)
1275 fprintf_filtered (stream
, "No locals.\n");
1279 /* Same, but print labels. */
1282 print_frame_label_vars (register struct frame_info
*fi
, int this_level_only
,
1283 register struct ui_file
*stream
)
1285 register struct blockvector
*bl
;
1286 register struct block
*block
= get_frame_block (fi
, 0);
1287 register int values_printed
= 0;
1288 int index
, have_default
= 0;
1289 char *blocks_printed
;
1290 CORE_ADDR pc
= fi
->pc
;
1294 fprintf_filtered (stream
, "No symbol table info available.\n");
1298 bl
= blockvector_for_pc (BLOCK_END (block
) - 4, &index
);
1299 blocks_printed
= (char *) alloca (BLOCKVECTOR_NBLOCKS (bl
) * sizeof (char));
1300 memset (blocks_printed
, 0, BLOCKVECTOR_NBLOCKS (bl
) * sizeof (char));
1304 CORE_ADDR end
= BLOCK_END (block
) - 4;
1307 if (bl
!= blockvector_for_pc (end
, &index
))
1308 error ("blockvector blotch");
1309 if (BLOCKVECTOR_BLOCK (bl
, index
) != block
)
1310 error ("blockvector botch");
1311 last_index
= BLOCKVECTOR_NBLOCKS (bl
);
1314 /* Don't print out blocks that have gone by. */
1315 while (index
< last_index
1316 && BLOCK_END (BLOCKVECTOR_BLOCK (bl
, index
)) < pc
)
1319 while (index
< last_index
1320 && BLOCK_END (BLOCKVECTOR_BLOCK (bl
, index
)) < end
)
1322 if (blocks_printed
[index
] == 0)
1324 if (print_block_frame_labels (BLOCKVECTOR_BLOCK (bl
, index
), &have_default
, stream
))
1326 blocks_printed
[index
] = 1;
1332 if (values_printed
&& this_level_only
)
1335 /* After handling the function's top-level block, stop.
1336 Don't continue to its superblock, the block of
1337 per-file symbols. */
1338 if (BLOCK_FUNCTION (block
))
1340 block
= BLOCK_SUPERBLOCK (block
);
1343 if (!values_printed
&& !this_level_only
)
1345 fprintf_filtered (stream
, "No catches.\n");
1351 locals_info (char *args
, int from_tty
)
1353 if (!selected_frame
)
1354 error ("No frame selected.");
1355 print_frame_local_vars (selected_frame
, 0, gdb_stdout
);
1359 catch_info (char *ignore
, int from_tty
)
1361 struct symtab_and_line
*sal
;
1363 /* Check for target support for exception handling */
1364 sal
= target_enable_exception_callback (EX_EVENT_CATCH
, 1);
1367 /* Currently not handling this */
1368 /* Ideally, here we should interact with the C++ runtime
1369 system to find the list of active handlers, etc. */
1370 fprintf_filtered (gdb_stdout
, "Info catch not supported with this target/compiler combination.\n");
1372 if (!selected_frame
)
1373 error ("No frame selected.");
1378 /* Assume g++ compiled code -- old v 4.16 behaviour */
1379 if (!selected_frame
)
1380 error ("No frame selected.");
1382 print_frame_label_vars (selected_frame
, 0, gdb_stdout
);
1387 print_frame_arg_vars (register struct frame_info
*fi
,
1388 register struct ui_file
*stream
)
1390 struct symbol
*func
= get_frame_function (fi
);
1391 register struct block
*b
;
1393 register struct symbol
*sym
, *sym2
;
1394 register int values_printed
= 0;
1398 fprintf_filtered (stream
, "No symbol table info available.\n");
1402 b
= SYMBOL_BLOCK_VALUE (func
);
1403 ALL_BLOCK_SYMBOLS (b
, i
, sym
)
1405 switch (SYMBOL_CLASS (sym
))
1411 case LOC_REGPARM_ADDR
:
1412 case LOC_BASEREG_ARG
:
1414 fputs_filtered (SYMBOL_SOURCE_NAME (sym
), stream
);
1415 fputs_filtered (" = ", stream
);
1417 /* We have to look up the symbol because arguments can have
1418 two entries (one a parameter, one a local) and the one we
1419 want is the local, which lookup_symbol will find for us.
1420 This includes gcc1 (not gcc2) on the sparc when passing a
1421 small structure and gcc2 when the argument type is float
1422 and it is passed as a double and converted to float by
1423 the prologue (in the latter case the type of the LOC_ARG
1424 symbol is double and the type of the LOC_LOCAL symbol is
1425 float). There are also LOC_ARG/LOC_REGISTER pairs which
1426 are not combined in symbol-reading. */
1428 sym2
= lookup_symbol (SYMBOL_NAME (sym
),
1429 b
, VAR_NAMESPACE
, (int *) NULL
, (struct symtab
**) NULL
);
1430 print_variable_value (sym2
, fi
, stream
);
1431 fprintf_filtered (stream
, "\n");
1435 /* Don't worry about things which aren't arguments. */
1439 if (!values_printed
)
1441 fprintf_filtered (stream
, "No arguments.\n");
1446 args_info (char *ignore
, int from_tty
)
1448 if (!selected_frame
)
1449 error ("No frame selected.");
1450 print_frame_arg_vars (selected_frame
, gdb_stdout
);
1455 args_plus_locals_info (char *ignore
, int from_tty
)
1457 args_info (ignore
, from_tty
);
1458 locals_info (ignore
, from_tty
);
1462 /* Select frame FI (or NULL - to invalidate the current frame). */
1465 select_frame (struct frame_info
*fi
)
1467 register struct symtab
*s
;
1469 selected_frame
= fi
;
1470 /* NOTE: cagney/2002-05-04: FI can be NULL. This occures when the
1471 frame is being invalidated. */
1472 if (selected_frame_level_changed_hook
)
1473 selected_frame_level_changed_hook (frame_relative_level (fi
));
1475 /* Ensure that symbols for this frame are read in. Also, determine the
1476 source language of this frame, and switch to it if desired. */
1479 s
= find_pc_symtab (fi
->pc
);
1481 && s
->language
!= current_language
->la_language
1482 && s
->language
!= language_unknown
1483 && language_mode
== language_mode_auto
)
1485 set_language (s
->language
);
1491 /* Select frame FI. Also print the stack frame and show the source if
1492 this is the tui version. */
1494 select_and_print_frame (struct frame_info
*fi
)
1499 print_stack_frame (fi
, frame_relative_level (fi
), 1);
1504 /* Store the selected frame and its level into *FRAMEP and *LEVELP.
1505 If there is no selected frame, *FRAMEP is set to NULL. */
1508 record_selected_frame (CORE_ADDR
*frameaddrp
, int *levelp
)
1510 *frameaddrp
= selected_frame
? selected_frame
->frame
: 0;
1511 *levelp
= frame_relative_level (selected_frame
);
1514 /* Return the symbol-block in which the selected frame is executing.
1515 Can return zero under various legitimate circumstances.
1517 If ADDR_IN_BLOCK is non-zero, set *ADDR_IN_BLOCK to the relevant
1518 code address within the block returned. We use this to decide
1519 which macros are in scope. */
1522 get_selected_block (CORE_ADDR
*addr_in_block
)
1524 if (!target_has_stack
)
1527 if (!selected_frame
)
1528 return get_current_block (addr_in_block
);
1529 return get_frame_block (selected_frame
, addr_in_block
);
1532 /* Find a frame a certain number of levels away from FRAME.
1533 LEVEL_OFFSET_PTR points to an int containing the number of levels.
1534 Positive means go to earlier frames (up); negative, the reverse.
1535 The int that contains the number of levels is counted toward
1536 zero as the frames for those levels are found.
1537 If the top or bottom frame is reached, that frame is returned,
1538 but the final value of *LEVEL_OFFSET_PTR is nonzero and indicates
1539 how much farther the original request asked to go. */
1542 find_relative_frame (register struct frame_info
*frame
,
1543 register int *level_offset_ptr
)
1545 register struct frame_info
*prev
;
1546 register struct frame_info
*frame1
;
1548 /* Going up is simple: just do get_prev_frame enough times
1549 or until initial frame is reached. */
1550 while (*level_offset_ptr
> 0)
1552 prev
= get_prev_frame (frame
);
1555 (*level_offset_ptr
)--;
1558 /* Going down is just as simple. */
1559 if (*level_offset_ptr
< 0)
1561 while (*level_offset_ptr
< 0)
1563 frame1
= get_next_frame (frame
);
1567 (*level_offset_ptr
)++;
1573 /* The "select_frame" command. With no arg, NOP.
1574 With arg LEVEL_EXP, select the frame at level LEVEL if it is a
1575 valid level. Otherwise, treat level_exp as an address expression
1576 and select it. See parse_frame_specification for more info on proper
1577 frame expressions. */
1581 select_frame_command_wrapper (char *level_exp
, int from_tty
)
1583 select_frame_command (level_exp
, from_tty
);
1587 select_frame_command (char *level_exp
, int from_tty
)
1589 register struct frame_info
*frame
, *frame1
;
1590 unsigned int level
= 0;
1592 if (!target_has_stack
)
1593 error ("No stack.");
1595 frame
= parse_frame_specification (level_exp
);
1597 select_frame (frame
);
1600 /* The "frame" command. With no arg, print selected frame briefly.
1601 With arg, behaves like select_frame and then prints the selected
1605 frame_command (char *level_exp
, int from_tty
)
1607 select_frame_command (level_exp
, from_tty
);
1608 show_and_print_stack_frame (selected_frame
,
1609 frame_relative_level (selected_frame
), 1);
1612 /* The XDB Compatibility command to print the current frame. */
1615 current_frame_command (char *level_exp
, int from_tty
)
1617 if (target_has_stack
== 0 || selected_frame
== 0)
1618 error ("No stack.");
1619 print_only_stack_frame (selected_frame
,
1620 frame_relative_level (selected_frame
), 1);
1623 /* Select the frame up one or COUNT stack levels
1624 from the previously selected frame, and print it briefly. */
1628 up_silently_base (char *count_exp
)
1630 register struct frame_info
*fi
;
1631 int count
= 1, count1
;
1633 count
= parse_and_eval_long (count_exp
);
1636 if (target_has_stack
== 0 || selected_frame
== 0)
1637 error ("No stack.");
1639 fi
= find_relative_frame (selected_frame
, &count1
);
1640 if (count1
!= 0 && count_exp
== 0)
1641 error ("Initial frame selected; you cannot go up.");
1646 up_silently_command (char *count_exp
, int from_tty
)
1648 up_silently_base (count_exp
);
1652 up_command (char *count_exp
, int from_tty
)
1654 up_silently_base (count_exp
);
1655 show_and_print_stack_frame (selected_frame
,
1656 frame_relative_level (selected_frame
), 1);
1659 /* Select the frame down one or COUNT stack levels
1660 from the previously selected frame, and print it briefly. */
1664 down_silently_base (char *count_exp
)
1666 register struct frame_info
*frame
;
1667 int count
= -1, count1
;
1669 count
= -parse_and_eval_long (count_exp
);
1672 if (target_has_stack
== 0 || selected_frame
== 0)
1673 error ("No stack.");
1675 frame
= find_relative_frame (selected_frame
, &count1
);
1676 if (count1
!= 0 && count_exp
== 0)
1679 /* We only do this if count_exp is not specified. That way "down"
1680 means to really go down (and let me know if that is
1681 impossible), but "down 9999" can be used to mean go all the way
1682 down without getting an error. */
1684 error ("Bottom (i.e., innermost) frame selected; you cannot go down.");
1687 select_frame (frame
);
1692 down_silently_command (char *count_exp
, int from_tty
)
1694 down_silently_base (count_exp
);
1698 down_command (char *count_exp
, int from_tty
)
1700 down_silently_base (count_exp
);
1701 show_and_print_stack_frame (selected_frame
,
1702 frame_relative_level (selected_frame
), 1);
1706 return_command_wrapper (char *retval_exp
, int from_tty
)
1708 return_command (retval_exp
, from_tty
);
1712 return_command (char *retval_exp
, int from_tty
)
1714 struct symbol
*thisfun
;
1715 CORE_ADDR selected_frame_addr
;
1716 CORE_ADDR selected_frame_pc
;
1717 struct frame_info
*frame
;
1718 struct value
*return_value
= NULL
;
1720 if (selected_frame
== NULL
)
1721 error ("No selected frame.");
1722 thisfun
= get_frame_function (selected_frame
);
1723 selected_frame_addr
= FRAME_FP (selected_frame
);
1724 selected_frame_pc
= selected_frame
->pc
;
1726 /* Compute the return value (if any -- possibly getting errors here). */
1730 struct type
*return_type
= NULL
;
1732 return_value
= parse_and_eval (retval_exp
);
1734 /* Cast return value to the return type of the function. */
1735 if (thisfun
!= NULL
)
1736 return_type
= TYPE_TARGET_TYPE (SYMBOL_TYPE (thisfun
));
1737 if (return_type
== NULL
)
1738 return_type
= builtin_type_int
;
1739 return_value
= value_cast (return_type
, return_value
);
1741 /* Make sure we have fully evaluated it, since
1742 it might live in the stack frame we're about to pop. */
1743 if (VALUE_LAZY (return_value
))
1744 value_fetch_lazy (return_value
);
1747 /* If interactive, require confirmation. */
1753 if (!query ("Make %s return now? ", SYMBOL_SOURCE_NAME (thisfun
)))
1755 error ("Not confirmed.");
1759 else if (!query ("Make selected stack frame return now? "))
1760 error ("Not confirmed.");
1763 /* Do the real work. Pop until the specified frame is current. We
1764 use this method because the selected_frame is not valid after
1765 a POP_FRAME. The pc comparison makes this work even if the
1766 selected frame shares its fp with another frame. */
1768 while (selected_frame_addr
!= (frame
= get_current_frame ())->frame
1769 || selected_frame_pc
!= frame
->pc
)
1772 /* Then pop that frame. */
1776 /* Compute the return value (if any) and store in the place
1777 for return values. */
1780 set_return_value (return_value
);
1782 /* If we are at the end of a call dummy now, pop the dummy frame too. */
1784 if (CALL_DUMMY_HAS_COMPLETED (read_pc(), read_sp (),
1785 FRAME_FP (get_current_frame ())))
1788 /* If interactive, print the frame that is now current. */
1791 frame_command ("0", 1);
1793 select_frame_command ("0", 0);
1796 /* Sets the scope to input function name, provided that the
1797 function is within the current stack frame */
1799 struct function_bounds
1801 CORE_ADDR low
, high
;
1804 static void func_command (char *arg
, int from_tty
);
1806 func_command (char *arg
, int from_tty
)
1808 struct frame_info
*fp
;
1810 struct symtabs_and_lines sals
;
1813 struct function_bounds
*func_bounds
= (struct function_bounds
*) NULL
;
1815 if (arg
!= (char *) NULL
)
1818 fp
= parse_frame_specification ("0");
1819 sals
= decode_line_spec (arg
, 1);
1820 func_bounds
= (struct function_bounds
*) xmalloc (
1821 sizeof (struct function_bounds
) * sals
.nelts
);
1822 for (i
= 0; (i
< sals
.nelts
&& !found
); i
++)
1824 if (sals
.sals
[i
].pc
== (CORE_ADDR
) 0 ||
1825 find_pc_partial_function (sals
.sals
[i
].pc
,
1827 &func_bounds
[i
].low
,
1828 &func_bounds
[i
].high
) == 0)
1830 func_bounds
[i
].low
=
1831 func_bounds
[i
].high
= (CORE_ADDR
) NULL
;
1837 for (i
= 0; (i
< sals
.nelts
&& !found
); i
++)
1838 found
= (fp
->pc
>= func_bounds
[i
].low
&&
1839 fp
->pc
< func_bounds
[i
].high
);
1843 fp
= find_relative_frame (fp
, &level
);
1846 while (!found
&& level
== 0);
1849 xfree (func_bounds
);
1852 printf_filtered ("'%s' not within current stack frame.\n", arg
);
1853 else if (fp
!= selected_frame
)
1854 select_and_print_frame (fp
);
1857 /* Gets the language of the current frame. */
1860 get_frame_language (void)
1862 register struct symtab
*s
;
1863 enum language flang
; /* The language of the current frame */
1867 s
= find_pc_symtab (selected_frame
->pc
);
1869 flang
= s
->language
;
1871 flang
= language_unknown
;
1874 flang
= language_unknown
;
1880 _initialize_stack (void)
1883 backtrace_limit
= 30;
1886 add_com ("return", class_stack
, return_command
,
1887 "Make selected stack frame return to its caller.\n\
1888 Control remains in the debugger, but when you continue\n\
1889 execution will resume in the frame above the one now selected.\n\
1890 If an argument is given, it is an expression for the value to return.");
1892 add_com ("up", class_stack
, up_command
,
1893 "Select and print stack frame that called this one.\n\
1894 An argument says how many frames up to go.");
1895 add_com ("up-silently", class_support
, up_silently_command
,
1896 "Same as the `up' command, but does not print anything.\n\
1897 This is useful in command scripts.");
1899 add_com ("down", class_stack
, down_command
,
1900 "Select and print stack frame called by this one.\n\
1901 An argument says how many frames down to go.");
1902 add_com_alias ("do", "down", class_stack
, 1);
1903 add_com_alias ("dow", "down", class_stack
, 1);
1904 add_com ("down-silently", class_support
, down_silently_command
,
1905 "Same as the `down' command, but does not print anything.\n\
1906 This is useful in command scripts.");
1908 add_com ("frame", class_stack
, frame_command
,
1909 "Select and print a stack frame.\n\
1910 With no argument, print the selected stack frame. (See also \"info frame\").\n\
1911 An argument specifies the frame to select.\n\
1912 It can be a stack frame number or the address of the frame.\n\
1913 With argument, nothing is printed if input is coming from\n\
1914 a command file or a user-defined command.");
1916 add_com_alias ("f", "frame", class_stack
, 1);
1920 add_com ("L", class_stack
, current_frame_command
,
1921 "Print the current stack frame.\n");
1922 add_com_alias ("V", "frame", class_stack
, 1);
1924 add_com ("select-frame", class_stack
, select_frame_command
,
1925 "Select a stack frame without printing anything.\n\
1926 An argument specifies the frame to select.\n\
1927 It can be a stack frame number or the address of the frame.\n");
1929 add_com ("backtrace", class_stack
, backtrace_command
,
1930 "Print backtrace of all stack frames, or innermost COUNT frames.\n\
1931 With a negative argument, print outermost -COUNT frames.\n\
1932 Use of the 'full' qualifier also prints the values of the local variables.\n");
1933 add_com_alias ("bt", "backtrace", class_stack
, 0);
1936 add_com_alias ("t", "backtrace", class_stack
, 0);
1937 add_com ("T", class_stack
, backtrace_full_command
,
1938 "Print backtrace of all stack frames, or innermost COUNT frames \n\
1939 and the values of the local variables.\n\
1940 With a negative argument, print outermost -COUNT frames.\n\
1941 Usage: T <count>\n");
1944 add_com_alias ("where", "backtrace", class_alias
, 0);
1945 add_info ("stack", backtrace_command
,
1946 "Backtrace of the stack, or innermost COUNT frames.");
1947 add_info_alias ("s", "stack", 1);
1948 add_info ("frame", frame_info
,
1949 "All about selected stack frame, or frame at ADDR.");
1950 add_info_alias ("f", "frame", 1);
1951 add_info ("locals", locals_info
,
1952 "Local variables of current stack frame.");
1953 add_info ("args", args_info
,
1954 "Argument variables of current stack frame.");
1956 add_com ("l", class_info
, args_plus_locals_info
,
1957 "Argument and local variables of current stack frame.");
1960 add_com ("func", class_stack
, func_command
,
1961 "Select the stack frame that contains <func>.\nUsage: func <name>\n");
1963 add_info ("catch", catch_info
,
1964 "Exceptions that can be caught in the current stack frame.");
1967 add_cmd ("backtrace-limit", class_stack
, set_backtrace_limit_command
,
1968 "Specify maximum number of frames for \"backtrace\" to print by default.",
1970 add_info ("backtrace-limit", backtrace_limit_info
,
1971 "The maximum number of frames for \"backtrace\" to print by default.");