1 /* Print and select stack frames for GDB, the GNU debugger.
2 Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
3 1996, 1997, 1998, 1999, 2000, 2001 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
24 #include "gdb_string.h"
28 #include "expression.h"
34 #include "breakpoint.h"
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 info_verbose
; /* Verbosity of symbol reading msgs */
112 extern int lines_to_list
; /* # of lines "list" command shows by default */
114 /* The "selected" stack frame is used by default for local and arg access.
115 May be zero, for no selected frame. */
117 struct frame_info
*selected_frame
;
119 /* Level of the selected frame:
120 0 for innermost, 1 for its caller, ...
121 or -1 for frame specified by address with no defined level. */
123 int selected_frame_level
;
125 /* Zero means do things normally; we are interacting directly with the
126 user. One means print the full filename and linenumber when a
127 frame is printed, and do so in a format emacs18/emacs19.22 can
128 parse. Two means print similar annotations, but in many more
129 cases and in a slightly different syntax. */
131 int annotation_level
= 0;
134 struct print_stack_frame_args
136 struct frame_info
*fi
;
142 static int print_stack_frame_base_stub (char *);
144 /* Show and print the frame arguments.
145 Pass the args the way catch_errors wants them. */
146 static int show_and_print_stack_frame_stub (void *args
);
148 show_and_print_stack_frame_stub (void *args
)
150 struct print_stack_frame_args
*p
= (struct print_stack_frame_args
*) args
;
152 /* Reversed order of these so tuiDo() doesn't occur
153 * in the middle of "Breakpoint 1 ... [location]" printing = RT
156 print_frame_info_base (p
->fi
, p
->level
, p
->source
, p
->args
);
157 print_frame_info (p
->fi
, p
->level
, p
->source
, p
->args
);
162 /* Show or print the frame arguments.
163 Pass the args the way catch_errors wants them. */
164 static int print_stack_frame_stub (void *args
);
166 print_stack_frame_stub (void *args
)
168 struct print_stack_frame_args
*p
= (struct print_stack_frame_args
*) args
;
171 print_frame_info (p
->fi
, p
->level
, p
->source
, p
->args
);
173 print_frame_info_base (p
->fi
, p
->level
, p
->source
, p
->args
);
177 /* Print a stack frame briefly. FRAME_INFI should be the frame info
178 and LEVEL should be its level in the stack (or -1 for level not
181 /* Pass the args the way catch_errors wants them. */
183 print_stack_frame_base_stub (char *args
)
185 struct print_stack_frame_args
*p
= (struct print_stack_frame_args
*) args
;
187 print_frame_info_base (p
->fi
, p
->level
, p
->source
, p
->args
);
191 /* print the frame arguments to the terminal.
192 Pass the args the way catch_errors wants them. */
193 static int print_only_stack_frame_stub (void *);
195 print_only_stack_frame_stub (void *args
)
197 struct print_stack_frame_args
*p
= (struct print_stack_frame_args
*) args
;
199 print_frame_info_base (p
->fi
, p
->level
, p
->source
, p
->args
);
203 /* Print a stack frame briefly. FRAME_INFI should be the frame info
204 and LEVEL should be its level in the stack (or -1 for level not defined).
205 This prints the level, the function executing, the arguments,
206 and the file name and line number.
207 If the pc is not at the beginning of the source line,
208 the actual pc is printed at the beginning.
210 If SOURCE is 1, print the source line as well.
211 If SOURCE is -1, print ONLY the source line. */
214 print_stack_frame_base (struct frame_info
*fi
, int level
, int source
)
216 struct print_stack_frame_args args
;
220 args
.source
= source
;
223 catch_errors (print_stack_frame_stub
, &args
, "", RETURN_MASK_ALL
);
226 /* Show and print a stack frame briefly. FRAME_INFI should be the frame info
227 and LEVEL should be its level in the stack (or -1 for level not defined).
228 This prints the level, the function executing, the arguments,
229 and the file name and line number.
230 If the pc is not at the beginning of the source line,
231 the actual pc is printed at the beginning.
233 If SOURCE is 1, print the source line as well.
234 If SOURCE is -1, print ONLY the source line. */
237 show_and_print_stack_frame (struct frame_info
*fi
, int level
, int source
)
239 struct print_stack_frame_args args
;
243 args
.source
= source
;
246 catch_errors (show_and_print_stack_frame_stub
, &args
, "", RETURN_MASK_ALL
);
250 /* Show or print a stack frame briefly. FRAME_INFI should be the frame info
251 and LEVEL should be its level in the stack (or -1 for level not defined).
252 This prints the level, the function executing, the arguments,
253 and the file name and line number.
254 If the pc is not at the beginning of the source line,
255 the actual pc is printed at the beginning.
257 If SOURCE is 1, print the source line as well.
258 If SOURCE is -1, print ONLY the source line. */
261 print_stack_frame (struct frame_info
*fi
, int level
, int source
)
263 struct print_stack_frame_args args
;
267 args
.source
= source
;
270 catch_errors (print_stack_frame_stub
, (char *) &args
, "", RETURN_MASK_ALL
);
273 /* Print a stack frame briefly. FRAME_INFI should be the frame info
274 and LEVEL should be its level in the stack (or -1 for level not defined).
275 This prints the level, the function executing, the arguments,
276 and the file name and line number.
277 If the pc is not at the beginning of the source line,
278 the actual pc is printed at the beginning.
280 If SOURCE is 1, print the source line as well.
281 If SOURCE is -1, print ONLY the source line. */
284 print_only_stack_frame (struct frame_info
*fi
, int level
, int source
)
286 struct print_stack_frame_args args
;
290 args
.source
= source
;
293 catch_errors (print_only_stack_frame_stub
, &args
, "", RETURN_MASK_ALL
);
296 struct print_args_args
299 struct frame_info
*fi
;
300 struct ui_file
*stream
;
303 static int print_args_stub (PTR
);
305 /* Pass the args the way catch_errors wants them. */
308 print_args_stub (PTR args
)
311 struct print_args_args
*p
= (struct print_args_args
*) args
;
313 numargs
= FRAME_NUM_ARGS (p
->fi
);
314 print_frame_args (p
->func
, p
->fi
, numargs
, p
->stream
);
318 /* Print information about a frame for frame "fi" at level "level".
319 Used in "where" output, also used to emit breakpoint or step
321 LEVEL is the level of the frame, or -1 if it is the
322 innermost frame but we don't want to print the level.
323 The meaning of the SOURCE argument is:
324 SRC_LINE: Print only source line
325 LOCATION: Print only location
326 LOC_AND_SRC: Print location and source line. */
329 print_frame_info_base (struct frame_info
*fi
, int level
, int source
, int args
)
331 struct symtab_and_line sal
;
336 char buf
[MAX_REGISTER_RAW_SIZE
];
339 /* On the 68k, this spends too much time in m68k_find_saved_regs. */
341 /* Get the value of SP_REGNUM relative to the frame. */
342 get_saved_register (buf
, (int *) NULL
, (CORE_ADDR
*) NULL
,
343 FRAME_INFO_ID (fi
), SP_REGNUM
, (enum lval_type
*) NULL
);
344 sp
= extract_address (buf
, REGISTER_RAW_SIZE (SP_REGNUM
));
346 /* This is not a perfect test, because if a function alloca's some
347 memory, puts some code there, and then jumps into it, then the test
348 will succeed even though there is no call dummy. Probably best is
349 to check for a bp_call_dummy breakpoint. */
350 if (PC_IN_CALL_DUMMY (fi
->pc
, sp
, fi
->frame
))
352 if (frame_in_dummy (fi
))
355 annotate_frame_begin (level
== -1 ? 0 : level
, fi
->pc
);
357 /* Do this regardless of SOURCE because we don't have any source
358 to list for this frame. */
360 printf_filtered ("#%-2d ", level
);
361 annotate_function_call ();
362 printf_filtered ("<function called from gdb>\n");
363 annotate_frame_end ();
366 if (fi
->signal_handler_caller
)
368 annotate_frame_begin (level
== -1 ? 0 : level
, fi
->pc
);
370 /* Do this regardless of SOURCE because we don't have any source
371 to list for this frame. */
373 printf_filtered ("#%-2d ", level
);
374 annotate_signal_handler_caller ();
375 printf_filtered ("<signal handler called>\n");
376 annotate_frame_end ();
380 /* If fi is not the innermost frame, that normally means that fi->pc
381 points to *after* the call instruction, and we want to get the line
382 containing the call, never the next line. But if the next frame is
383 a signal_handler_caller or a dummy frame, then the next frame was
384 not entered as the result of a call, and we want to get the line
385 containing fi->pc. */
387 find_pc_line (fi
->pc
,
389 && !fi
->next
->signal_handler_caller
390 && !frame_in_dummy (fi
->next
));
392 location_print
= (source
== LOCATION
393 || source
== LOC_AND_ADDRESS
394 || source
== SRC_AND_LOC
);
396 if (location_print
|| !sal
.symtab
)
397 print_frame (fi
, level
, source
, args
, sal
);
399 source_print
= (source
== SRC_LINE
|| source
== SRC_AND_LOC
);
401 if (source_print
&& sal
.symtab
)
404 int mid_statement
= (source
== SRC_LINE
) && (fi
->pc
!= sal
.pc
);
406 if (annotation_level
)
407 done
= identify_source_line (sal
.symtab
, sal
.line
, mid_statement
,
411 if (addressprint
&& mid_statement
&& !tui_version
)
414 ui_out_field_core_addr (uiout
, "addr", fi
->pc
);
415 ui_out_text (uiout
, "\t");
417 print_address_numeric (fi
->pc
, 1, gdb_stdout
);
418 printf_filtered ("\t");
421 if (print_frame_info_listing_hook
)
422 print_frame_info_listing_hook (sal
.symtab
, sal
.line
, sal
.line
+ 1, 0);
423 else if (!tui_version
)
424 print_source_lines (sal
.symtab
, sal
.line
, sal
.line
+ 1, 0);
426 current_source_line
= max (sal
.line
- lines_to_list
/ 2, 1);
430 set_default_breakpoint (1, fi
->pc
, sal
.symtab
, sal
.line
);
432 annotate_frame_end ();
434 gdb_flush (gdb_stdout
);
438 print_frame (struct frame_info
*fi
,
442 struct symtab_and_line sal
)
445 register char *funname
= 0;
446 enum language funlang
= language_unknown
;
448 struct ui_stream
*stb
;
449 struct cleanup
*old_chain
;
450 struct cleanup
*list_chain
;
452 stb
= ui_out_stream_new (uiout
);
453 old_chain
= make_cleanup_ui_out_stream_delete (stb
);
456 func
= find_pc_function (fi
->pc
);
459 /* In certain pathological cases, the symtabs give the wrong
460 function (when we are in the first function in a file which
461 is compiled without debugging symbols, the previous function
462 is compiled with debugging symbols, and the "foo.o" symbol
463 that is supposed to tell us where the file with debugging symbols
464 ends has been truncated by ar because it is longer than 15
465 characters). This also occurs if the user uses asm() to create
466 a function but not stabs for it (in a file compiled -g).
468 So look in the minimal symbol tables as well, and if it comes
469 up with a larger address for the function use that instead.
470 I don't think this can ever cause any problems; there shouldn't
471 be any minimal symbols in the middle of a function; if this is
472 ever changed many parts of GDB will need to be changed (and we'll
473 create a find_pc_minimal_function or some such). */
475 struct minimal_symbol
*msymbol
= lookup_minimal_symbol_by_pc (fi
->pc
);
477 && (SYMBOL_VALUE_ADDRESS (msymbol
)
478 > BLOCK_START (SYMBOL_BLOCK_VALUE (func
))))
481 /* There is no particular reason to think the line number
482 information is wrong. Someone might have just put in
483 a label with asm() but left the line numbers alone. */
484 /* In this case we have no way of knowing the source file
485 and line number, so don't print them. */
488 /* We also don't know anything about the function besides
489 its address and name. */
491 funname
= SYMBOL_NAME (msymbol
);
492 funlang
= SYMBOL_LANGUAGE (msymbol
);
496 /* I'd like to use SYMBOL_SOURCE_NAME() here, to display the
497 demangled name that we already have stored in the symbol
498 table, but we stored a version with DMGL_PARAMS turned
499 on, and here we don't want to display parameters. So call
500 the demangler again, with DMGL_ANSI only. (Yes, I know
501 that printf_symbol_filtered() will again try to demangle
502 the name on the fly, but the issue is that if
503 cplus_demangle() fails here, it'll fail there too. So we
504 want to catch the failure ("demangled==NULL" case below)
505 here, while we still have our hands on the function
508 funname
= SYMBOL_NAME (func
);
509 funlang
= SYMBOL_LANGUAGE (func
);
510 if (funlang
== language_cplus
)
512 demangled
= cplus_demangle (funname
, DMGL_ANSI
);
513 if (demangled
== NULL
)
514 /* If the demangler fails, try the demangled name from
515 the symbol table. This'll have parameters, but
516 that's preferable to diplaying a mangled name. */
517 funname
= SYMBOL_SOURCE_NAME (func
);
523 struct minimal_symbol
*msymbol
= lookup_minimal_symbol_by_pc (fi
->pc
);
526 funname
= SYMBOL_NAME (msymbol
);
527 funlang
= SYMBOL_LANGUAGE (msymbol
);
531 annotate_frame_begin (level
== -1 ? 0 : level
, fi
->pc
);
534 list_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "frame");
540 ui_out_text (uiout
, "#");
541 ui_out_field_fmt (uiout
, "level", "%-2d", level
);
542 ui_out_spaces (uiout
, 1);
544 printf_filtered ("#%-2d ", level
);
548 if (fi
->pc
!= sal
.pc
|| !sal
.symtab
|| source
== LOC_AND_ADDRESS
)
550 annotate_frame_address ();
552 ui_out_field_core_addr (uiout
, "addr", fi
->pc
);
553 annotate_frame_address_end ();
554 ui_out_text (uiout
, " in ");
556 print_address_numeric (fi
->pc
, 1, gdb_stdout
);
557 annotate_frame_address_end ();
558 printf_filtered (" in ");
561 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
, " ");
568 fprintf_symbol_filtered (gdb_stdout
, funname
? funname
: "??", funlang
,
572 annotate_frame_args ();
575 ui_out_text (uiout
, " (");
577 fputs_filtered (" (", gdb_stdout
);
581 struct print_args_args args
;
583 struct cleanup
*args_list_chain
;
587 args
.stream
= gdb_stdout
;
589 args_list_chain
= make_cleanup_ui_out_list_begin_end (uiout
, "args");
590 catch_errors (print_args_stub
, &args
, "", RETURN_MASK_ALL
);
591 /* FIXME: args must be a list. If one argument is a string it will
592 have " that will not be properly escaped. */
593 /* Invoke ui_out_tuple_end. */
594 do_cleanups (args_list_chain
);
596 catch_errors (print_args_stub
, &args
, "", RETURN_MASK_ALL
);
601 ui_out_text (uiout
, ")");
603 printf_filtered (")");
605 if (sal
.symtab
&& sal
.symtab
->filename
)
607 annotate_frame_source_begin ();
609 ui_out_wrap_hint (uiout
, " ");
610 ui_out_text (uiout
, " at ");
611 annotate_frame_source_file ();
612 ui_out_field_string (uiout
, "file", sal
.symtab
->filename
);
613 annotate_frame_source_file_end ();
614 ui_out_text (uiout
, ":");
615 annotate_frame_source_line ();
616 ui_out_field_int (uiout
, "line", sal
.line
);
619 printf_filtered (" at ");
620 annotate_frame_source_file ();
621 printf_filtered ("%s", sal
.symtab
->filename
);
622 annotate_frame_source_file_end ();
623 printf_filtered (":");
624 annotate_frame_source_line ();
625 printf_filtered ("%d", sal
.line
);
627 annotate_frame_source_end ();
631 if (!funname
|| (!sal
.symtab
|| !sal
.symtab
->filename
))
633 char *lib
= PC_SOLIB (fi
->pc
);
636 annotate_frame_where ();
638 ui_out_wrap_hint (uiout
, " ");
639 ui_out_text (uiout
, " from ");
640 ui_out_field_string (uiout
, "from", lib
);
643 printf_filtered (" from %s", lib
);
647 #endif /* PC_SOLIB */
650 /* do_cleanups will call ui_out_tuple_end() for us. */
651 do_cleanups (list_chain
);
652 ui_out_text (uiout
, "\n");
653 do_cleanups (old_chain
);
655 printf_filtered ("\n");
662 stack_publish_stopped_with_no_frame (void)
664 TUIDO (((TuiOpaqueFuncPtr
) tuiUpdateOnEnd
));
670 /* Show or print the frame info. If this is the tui, it will be shown in
671 the source display */
673 print_frame_info (struct frame_info
*fi
, register int level
, int source
,
677 print_frame_info_base (fi
, level
, source
, args
);
680 if (fi
&& (frame_in_dummy (fi
) || fi
->signal_handler_caller
))
681 print_frame_info_base (fi
, level
, source
, args
);
684 TUIDO (((TuiOpaqueFuncPtr
) tui_vShowFrameInfo
, fi
));
689 /* Show the frame info. If this is the tui, it will be shown in
690 the source display otherwise, nothing is done */
692 show_stack_frame (struct frame_info
*fi
)
694 TUIDO (((TuiOpaqueFuncPtr
) tui_vShowFrameInfo
, fi
));
698 /* Read a frame specification in whatever the appropriate format is.
699 Call error() if the specification is in any way invalid (i.e.
700 this function never returns NULL). */
703 parse_frame_specification (char *frame_exp
)
707 CORE_ADDR args
[MAXARGS
];
712 char *addr_string
, *p
;
713 struct cleanup
*tmp_cleanup
;
715 while (*frame_exp
== ' ')
720 if (numargs
> MAXARGS
)
721 error ("Too many args in frame specification");
722 /* Parse an argument. */
723 for (p
= frame_exp
; *p
&& *p
!= ' '; p
++)
725 addr_string
= savestring (frame_exp
, p
- frame_exp
);
730 tmp_cleanup
= make_cleanup (xfree
, addr_string
);
732 /* NOTE: we call parse_and_eval and then both
733 value_as_long and value_as_pointer rather than calling
734 parse_and_eval_long and parse_and_eval_address because
735 of the issue of potential side effects from evaluating
737 vp
= parse_and_eval (addr_string
);
739 level
= value_as_long (vp
);
741 args
[numargs
++] = value_as_pointer (vp
);
742 do_cleanups (tmp_cleanup
);
745 /* Skip spaces, move to possible next arg. */
755 if (selected_frame
== NULL
)
756 error ("No selected frame.");
757 return selected_frame
;
761 struct frame_info
*fid
=
762 find_relative_frame (get_current_frame (), &level
);
763 struct frame_info
*tfid
;
766 /* find_relative_frame was successful */
769 /* If SETUP_ARBITRARY_FRAME is defined, then frame specifications
770 take at least 2 addresses. It is important to detect this case
771 here so that "frame 100" does not give a confusing error message
772 like "frame specification requires two addresses". This of course
773 does not solve the "frame 100" problem for machines on which
774 a frame specification can be made with one address. To solve
775 that, we need a new syntax for a specifying a frame by address.
776 I think the cleanest syntax is $frame(0x45) ($frame(0x23,0x45) for
777 two args, etc.), but people might think that is too much typing,
778 so I guess *0x23,0x45 would be a possible alternative (commas
779 really should be used instead of spaces to delimit; using spaces
780 normally works in an expression). */
781 #ifdef SETUP_ARBITRARY_FRAME
782 error ("No frame %d", args
[0]);
785 /* If (s)he specifies the frame with an address, he deserves what
786 (s)he gets. Still, give the highest one that matches. */
788 for (fid
= get_current_frame ();
789 fid
&& fid
->frame
!= args
[0];
790 fid
= get_prev_frame (fid
))
794 while ((tfid
= get_prev_frame (fid
)) &&
795 (tfid
->frame
== args
[0]))
798 /* We couldn't identify the frame as an existing frame, but
799 perhaps we can create one with a single argument. */
803 #ifdef SETUP_ARBITRARY_FRAME
804 return SETUP_ARBITRARY_FRAME (numargs
, args
);
806 /* Usual case. Do it here rather than have everyone supply
807 a SETUP_ARBITRARY_FRAME that does this. */
809 return create_new_frame (args
[0], 0);
810 error ("Too many args in frame specification");
817 /* FRAME_ARGS_ADDRESS_CORRECT is just like FRAME_ARGS_ADDRESS except
818 that if it is unsure about the answer, it returns 0
819 instead of guessing (this happens on the VAX and i960, for example).
821 On most machines, we never have to guess about the args address,
822 so FRAME_ARGS_ADDRESS{,_CORRECT} are the same. */
823 #if !defined (FRAME_ARGS_ADDRESS_CORRECT)
824 #define FRAME_ARGS_ADDRESS_CORRECT FRAME_ARGS_ADDRESS
827 /* Print verbosely the selected frame or the frame at address ADDR.
828 This means absolutely all information in the frame is printed. */
831 frame_info (char *addr_exp
, int from_tty
)
833 struct frame_info
*fi
;
834 struct symtab_and_line sal
;
837 struct frame_info
*calling_frame_info
;
838 int i
, count
, numregs
;
840 enum language funlang
= language_unknown
;
842 if (!target_has_stack
)
845 fi
= parse_frame_specification (addr_exp
);
847 error ("Invalid frame specified.");
849 sal
= find_pc_line (fi
->pc
,
851 && !fi
->next
->signal_handler_caller
852 && !frame_in_dummy (fi
->next
));
853 func
= get_frame_function (fi
);
854 s
= find_pc_symtab (fi
->pc
);
857 /* I'd like to use SYMBOL_SOURCE_NAME() here, to display
858 * the demangled name that we already have stored in
859 * the symbol table, but we stored a version with
860 * DMGL_PARAMS turned on, and here we don't want
861 * to display parameters. So call the demangler again,
862 * with DMGL_ANSI only. RT
863 * (Yes, I know that printf_symbol_filtered() will
864 * again try to demangle the name on the fly, but
865 * the issue is that if cplus_demangle() fails here,
866 * it'll fail there too. So we want to catch the failure
867 * ("demangled==NULL" case below) here, while we still
868 * have our hands on the function symbol.)
871 funname
= SYMBOL_NAME (func
);
872 funlang
= SYMBOL_LANGUAGE (func
);
873 if (funlang
== language_cplus
)
875 demangled
= cplus_demangle (funname
, DMGL_ANSI
);
876 /* If the demangler fails, try the demangled name
877 * from the symbol table. This'll have parameters,
878 * but that's preferable to diplaying a mangled name.
880 if (demangled
== NULL
)
881 funname
= SYMBOL_SOURCE_NAME (func
);
886 register struct minimal_symbol
*msymbol
= lookup_minimal_symbol_by_pc (fi
->pc
);
889 funname
= SYMBOL_NAME (msymbol
);
890 funlang
= SYMBOL_LANGUAGE (msymbol
);
893 calling_frame_info
= get_prev_frame (fi
);
895 if (!addr_exp
&& selected_frame_level
>= 0)
897 printf_filtered ("Stack level %d, frame at ", selected_frame_level
);
898 print_address_numeric (fi
->frame
, 1, gdb_stdout
);
899 printf_filtered (":\n");
903 printf_filtered ("Stack frame at ");
904 print_address_numeric (fi
->frame
, 1, gdb_stdout
);
905 printf_filtered (":\n");
907 printf_filtered (" %s = ", REGISTER_NAME (PC_REGNUM
));
908 print_address_numeric (fi
->pc
, 1, gdb_stdout
);
913 printf_filtered (" in ");
914 fprintf_symbol_filtered (gdb_stdout
, funname
, funlang
,
915 DMGL_ANSI
| DMGL_PARAMS
);
919 printf_filtered (" (%s:%d)", sal
.symtab
->filename
, sal
.line
);
920 puts_filtered ("; ");
922 printf_filtered ("saved %s ", REGISTER_NAME (PC_REGNUM
));
923 print_address_numeric (FRAME_SAVED_PC (fi
), 1, gdb_stdout
);
924 printf_filtered ("\n");
928 frameless
= FRAMELESS_FUNCTION_INVOCATION (fi
);
930 printf_filtered (" (FRAMELESS),");
933 if (calling_frame_info
)
935 printf_filtered (" called by frame at ");
936 print_address_numeric (calling_frame_info
->frame
, 1, gdb_stdout
);
938 if (fi
->next
&& calling_frame_info
)
943 printf_filtered (" caller of frame at ");
944 print_address_numeric (fi
->next
->frame
, 1, gdb_stdout
);
946 if (fi
->next
|| calling_frame_info
)
947 puts_filtered ("\n");
949 printf_filtered (" source language %s.\n", language_str (s
->language
));
951 #ifdef PRINT_EXTRA_FRAME_INFO
952 PRINT_EXTRA_FRAME_INFO (fi
);
956 /* Address of the argument list for this frame, or 0. */
957 CORE_ADDR arg_list
= FRAME_ARGS_ADDRESS_CORRECT (fi
);
958 /* Number of args for this frame, or -1 if unknown. */
962 printf_filtered (" Arglist at unknown address.\n");
965 printf_filtered (" Arglist at ");
966 print_address_numeric (arg_list
, 1, gdb_stdout
);
967 printf_filtered (",");
969 numargs
= FRAME_NUM_ARGS (fi
);
971 puts_filtered (" args: ");
972 else if (numargs
== 0)
973 puts_filtered (" no args.");
974 else if (numargs
== 1)
975 puts_filtered (" 1 arg: ");
977 printf_filtered (" %d args: ", numargs
);
978 print_frame_args (func
, fi
, numargs
, gdb_stdout
);
979 puts_filtered ("\n");
983 /* Address of the local variables for this frame, or 0. */
984 CORE_ADDR arg_list
= FRAME_LOCALS_ADDRESS (fi
);
987 printf_filtered (" Locals at unknown address,");
990 printf_filtered (" Locals at ");
991 print_address_numeric (arg_list
, 1, gdb_stdout
);
992 printf_filtered (",");
996 FRAME_INIT_SAVED_REGS (fi
);
997 if (fi
->saved_regs
!= NULL
)
999 /* The sp is special; what's returned isn't the save address, but
1000 actually the value of the previous frame's sp. */
1001 printf_filtered (" Previous frame's sp is ");
1002 print_address_numeric (fi
->saved_regs
[SP_REGNUM
], 1, gdb_stdout
);
1003 printf_filtered ("\n");
1005 numregs
= NUM_REGS
+ NUM_PSEUDO_REGS
;
1006 for (i
= 0; i
< numregs
; i
++)
1007 if (fi
->saved_regs
[i
] && i
!= SP_REGNUM
)
1010 puts_filtered (" Saved registers:\n ");
1012 puts_filtered (",");
1014 printf_filtered (" %s at ", REGISTER_NAME (i
));
1015 print_address_numeric (fi
->saved_regs
[i
], 1, gdb_stdout
);
1019 puts_filtered ("\n");
1023 /* We could get some information about saved registers by
1024 calling get_saved_register on each register. Which info goes
1025 with which frame is necessarily lost, however, and I suspect
1026 that the users don't care whether they get the info. */
1027 puts_filtered ("\n");
1032 /* Set a limit on the number of frames printed by default in a
1035 static int backtrace_limit
;
1038 set_backtrace_limit_command (char *count_exp
, int from_tty
)
1040 int count
= parse_and_eval_long (count_exp
);
1043 error ("Negative argument not meaningful as backtrace limit.");
1045 backtrace_limit
= count
;
1049 backtrace_limit_info (char *arg
, int from_tty
)
1052 error ("\"Info backtrace-limit\" takes no arguments.");
1054 printf_unfiltered ("Backtrace limit: %d.\n", backtrace_limit
);
1058 /* Print briefly all stack frames or just the innermost COUNT frames. */
1060 static void backtrace_command_1 (char *count_exp
, int show_locals
,
1063 backtrace_command_1 (char *count_exp
, int show_locals
, int from_tty
)
1065 struct frame_info
*fi
;
1068 register struct frame_info
*trailing
;
1069 register int trailing_level
;
1071 if (!target_has_stack
)
1072 error ("No stack.");
1074 /* The following code must do two things. First, it must
1075 set the variable TRAILING to the frame from which we should start
1076 printing. Second, it must set the variable count to the number
1077 of frames which we should print, or -1 if all of them. */
1078 trailing
= get_current_frame ();
1080 /* The target can be in a state where there is no valid frames
1081 (e.g., just connected). */
1082 if (trailing
== NULL
)
1083 error ("No stack.");
1088 count
= parse_and_eval_long (count_exp
);
1091 struct frame_info
*current
;
1096 while (current
&& count
--)
1099 current
= get_prev_frame (current
);
1102 /* Will stop when CURRENT reaches the top of the stack. TRAILING
1103 will be COUNT below it. */
1107 trailing
= get_prev_frame (trailing
);
1108 current
= get_prev_frame (current
);
1120 struct partial_symtab
*ps
;
1122 /* Read in symbols for all of the frames. Need to do this in
1123 a separate pass so that "Reading in symbols for xxx" messages
1124 don't screw up the appearance of the backtrace. Also
1125 if people have strong opinions against reading symbols for
1126 backtrace this may have to be an option. */
1130 fi
= get_prev_frame (fi
))
1133 ps
= find_pc_psymtab (fi
->pc
);
1135 PSYMTAB_TO_SYMTAB (ps
); /* Force syms to come in */
1139 for (i
= 0, fi
= trailing
;
1141 i
++, fi
= get_prev_frame (fi
))
1145 /* Don't use print_stack_frame; if an error() occurs it probably
1146 means further attempts to backtrace would fail (on the other
1147 hand, perhaps the code does or could be fixed to make sure
1148 the frame->prev field gets set to NULL in that case). */
1149 print_frame_info_base (fi
, trailing_level
+ i
, 0, 1);
1151 print_frame_local_vars (fi
, 1, gdb_stdout
);
1154 /* If we've stopped before the end, mention that. */
1156 printf_filtered ("(More stack frames follow...)\n");
1160 backtrace_command (char *arg
, int from_tty
)
1162 struct cleanup
*old_chain
= (struct cleanup
*) NULL
;
1163 char **argv
= (char **) NULL
;
1164 int argIndicatingFullTrace
= (-1), totArgLen
= 0, argc
= 0;
1167 if (arg
!= (char *) NULL
)
1171 argv
= buildargv (arg
);
1172 old_chain
= make_cleanup_freeargv (argv
);
1174 for (i
= 0; (argv
[i
] != (char *) NULL
); i
++)
1178 for (j
= 0; (j
< strlen (argv
[i
])); j
++)
1179 argv
[i
][j
] = tolower (argv
[i
][j
]);
1181 if (argIndicatingFullTrace
< 0 && subset_compare (argv
[i
], "full"))
1182 argIndicatingFullTrace
= argc
;
1186 totArgLen
+= strlen (argv
[i
]);
1190 if (argIndicatingFullTrace
>= 0)
1194 argPtr
= (char *) xmalloc (totArgLen
+ 1);
1199 memset (argPtr
, 0, totArgLen
+ 1);
1200 for (i
= 0; (i
< (argc
+ 1)); i
++)
1202 if (i
!= argIndicatingFullTrace
)
1204 strcat (argPtr
, argv
[i
]);
1205 strcat (argPtr
, " ");
1211 argPtr
= (char *) NULL
;
1215 backtrace_command_1 (argPtr
, (argIndicatingFullTrace
>= 0), from_tty
);
1217 if (argIndicatingFullTrace
>= 0 && totArgLen
> 0)
1221 do_cleanups (old_chain
);
1224 static void backtrace_full_command (char *arg
, int from_tty
);
1226 backtrace_full_command (char *arg
, int from_tty
)
1228 backtrace_command_1 (arg
, 1, from_tty
);
1232 /* Print the local variables of a block B active in FRAME.
1233 Return 1 if any variables were printed; 0 otherwise. */
1236 print_block_frame_locals (struct block
*b
, register struct frame_info
*fi
,
1237 int num_tabs
, register struct ui_file
*stream
)
1241 register struct symbol
*sym
;
1242 register int values_printed
= 0;
1244 nsyms
= BLOCK_NSYMS (b
);
1246 for (i
= 0; i
< nsyms
; i
++)
1248 sym
= BLOCK_SYM (b
, i
);
1249 switch (SYMBOL_CLASS (sym
))
1256 for (j
= 0; j
< num_tabs
; j
++)
1257 fputs_filtered ("\t", stream
);
1258 fputs_filtered (SYMBOL_SOURCE_NAME (sym
), stream
);
1259 fputs_filtered (" = ", stream
);
1260 print_variable_value (sym
, fi
, stream
);
1261 fprintf_filtered (stream
, "\n");
1265 /* Ignore symbols which are not locals. */
1269 return values_printed
;
1272 /* Same, but print labels. */
1275 print_block_frame_labels (struct block
*b
, int *have_default
,
1276 register struct ui_file
*stream
)
1280 register struct symbol
*sym
;
1281 register int values_printed
= 0;
1283 nsyms
= BLOCK_NSYMS (b
);
1285 for (i
= 0; i
< nsyms
; i
++)
1287 sym
= BLOCK_SYM (b
, i
);
1288 if (STREQ (SYMBOL_NAME (sym
), "default"))
1294 if (SYMBOL_CLASS (sym
) == LOC_LABEL
)
1296 struct symtab_and_line sal
;
1297 sal
= find_pc_line (SYMBOL_VALUE_ADDRESS (sym
), 0);
1299 fputs_filtered (SYMBOL_SOURCE_NAME (sym
), stream
);
1302 fprintf_filtered (stream
, " ");
1303 print_address_numeric (SYMBOL_VALUE_ADDRESS (sym
), 1, stream
);
1305 fprintf_filtered (stream
, " in file %s, line %d\n",
1306 sal
.symtab
->filename
, sal
.line
);
1309 return values_printed
;
1312 /* Print on STREAM all the local variables in frame FRAME,
1313 including all the blocks active in that frame
1316 Returns 1 if the job was done,
1317 or 0 if nothing was printed because we have no info
1318 on the function running in FRAME. */
1321 print_frame_local_vars (register struct frame_info
*fi
, register int num_tabs
,
1322 register struct ui_file
*stream
)
1324 register struct block
*block
= get_frame_block (fi
);
1325 register int values_printed
= 0;
1329 fprintf_filtered (stream
, "No symbol table info available.\n");
1335 if (print_block_frame_locals (block
, fi
, num_tabs
, stream
))
1337 /* After handling the function's top-level block, stop.
1338 Don't continue to its superblock, the block of
1339 per-file symbols. */
1340 if (BLOCK_FUNCTION (block
))
1342 block
= BLOCK_SUPERBLOCK (block
);
1345 if (!values_printed
)
1347 fprintf_filtered (stream
, "No locals.\n");
1351 /* Same, but print labels. */
1354 print_frame_label_vars (register struct frame_info
*fi
, int this_level_only
,
1355 register struct ui_file
*stream
)
1357 register struct blockvector
*bl
;
1358 register struct block
*block
= get_frame_block (fi
);
1359 register int values_printed
= 0;
1360 int index
, have_default
= 0;
1361 char *blocks_printed
;
1362 CORE_ADDR pc
= fi
->pc
;
1366 fprintf_filtered (stream
, "No symbol table info available.\n");
1370 bl
= blockvector_for_pc (BLOCK_END (block
) - 4, &index
);
1371 blocks_printed
= (char *) alloca (BLOCKVECTOR_NBLOCKS (bl
) * sizeof (char));
1372 memset (blocks_printed
, 0, BLOCKVECTOR_NBLOCKS (bl
) * sizeof (char));
1376 CORE_ADDR end
= BLOCK_END (block
) - 4;
1379 if (bl
!= blockvector_for_pc (end
, &index
))
1380 error ("blockvector blotch");
1381 if (BLOCKVECTOR_BLOCK (bl
, index
) != block
)
1382 error ("blockvector botch");
1383 last_index
= BLOCKVECTOR_NBLOCKS (bl
);
1386 /* Don't print out blocks that have gone by. */
1387 while (index
< last_index
1388 && BLOCK_END (BLOCKVECTOR_BLOCK (bl
, index
)) < pc
)
1391 while (index
< last_index
1392 && BLOCK_END (BLOCKVECTOR_BLOCK (bl
, index
)) < end
)
1394 if (blocks_printed
[index
] == 0)
1396 if (print_block_frame_labels (BLOCKVECTOR_BLOCK (bl
, index
), &have_default
, stream
))
1398 blocks_printed
[index
] = 1;
1404 if (values_printed
&& this_level_only
)
1407 /* After handling the function's top-level block, stop.
1408 Don't continue to its superblock, the block of
1409 per-file symbols. */
1410 if (BLOCK_FUNCTION (block
))
1412 block
= BLOCK_SUPERBLOCK (block
);
1415 if (!values_printed
&& !this_level_only
)
1417 fprintf_filtered (stream
, "No catches.\n");
1423 locals_info (char *args
, int from_tty
)
1425 if (!selected_frame
)
1426 error ("No frame selected.");
1427 print_frame_local_vars (selected_frame
, 0, gdb_stdout
);
1431 catch_info (char *ignore
, int from_tty
)
1433 struct symtab_and_line
*sal
;
1435 /* Check for target support for exception handling */
1436 sal
= target_enable_exception_callback (EX_EVENT_CATCH
, 1);
1439 /* Currently not handling this */
1440 /* Ideally, here we should interact with the C++ runtime
1441 system to find the list of active handlers, etc. */
1442 fprintf_filtered (gdb_stdout
, "Info catch not supported with this target/compiler combination.\n");
1444 if (!selected_frame
)
1445 error ("No frame selected.");
1450 /* Assume g++ compiled code -- old v 4.16 behaviour */
1451 if (!selected_frame
)
1452 error ("No frame selected.");
1454 print_frame_label_vars (selected_frame
, 0, gdb_stdout
);
1459 print_frame_arg_vars (register struct frame_info
*fi
,
1460 register struct ui_file
*stream
)
1462 struct symbol
*func
= get_frame_function (fi
);
1463 register struct block
*b
;
1466 register struct symbol
*sym
, *sym2
;
1467 register int values_printed
= 0;
1471 fprintf_filtered (stream
, "No symbol table info available.\n");
1475 b
= SYMBOL_BLOCK_VALUE (func
);
1476 nsyms
= BLOCK_NSYMS (b
);
1478 for (i
= 0; i
< nsyms
; i
++)
1480 sym
= BLOCK_SYM (b
, i
);
1481 switch (SYMBOL_CLASS (sym
))
1487 case LOC_REGPARM_ADDR
:
1488 case LOC_BASEREG_ARG
:
1490 fputs_filtered (SYMBOL_SOURCE_NAME (sym
), stream
);
1491 fputs_filtered (" = ", stream
);
1493 /* We have to look up the symbol because arguments can have
1494 two entries (one a parameter, one a local) and the one we
1495 want is the local, which lookup_symbol will find for us.
1496 This includes gcc1 (not gcc2) on the sparc when passing a
1497 small structure and gcc2 when the argument type is float
1498 and it is passed as a double and converted to float by
1499 the prologue (in the latter case the type of the LOC_ARG
1500 symbol is double and the type of the LOC_LOCAL symbol is
1501 float). There are also LOC_ARG/LOC_REGISTER pairs which
1502 are not combined in symbol-reading. */
1504 sym2
= lookup_symbol (SYMBOL_NAME (sym
),
1505 b
, VAR_NAMESPACE
, (int *) NULL
, (struct symtab
**) NULL
);
1506 print_variable_value (sym2
, fi
, stream
);
1507 fprintf_filtered (stream
, "\n");
1511 /* Don't worry about things which aren't arguments. */
1516 if (!values_printed
)
1518 fprintf_filtered (stream
, "No arguments.\n");
1523 args_info (char *ignore
, int from_tty
)
1525 if (!selected_frame
)
1526 error ("No frame selected.");
1527 print_frame_arg_vars (selected_frame
, gdb_stdout
);
1532 args_plus_locals_info (char *ignore
, int from_tty
)
1534 args_info (ignore
, from_tty
);
1535 locals_info (ignore
, from_tty
);
1539 /* Select frame FI, and note that its stack level is LEVEL.
1540 LEVEL may be -1 if an actual level number is not known. */
1543 select_frame (struct frame_info
*fi
, int level
)
1545 register struct symtab
*s
;
1547 selected_frame
= fi
;
1548 selected_frame_level
= level
;
1549 if (selected_frame_level_changed_hook
)
1550 selected_frame_level_changed_hook (level
);
1552 /* Ensure that symbols for this frame are read in. Also, determine the
1553 source language of this frame, and switch to it if desired. */
1556 s
= find_pc_symtab (fi
->pc
);
1558 && s
->language
!= current_language
->la_language
1559 && s
->language
!= language_unknown
1560 && language_mode
== language_mode_auto
)
1562 set_language (s
->language
);
1564 /* elz: this if here fixes the problem with the pc not being displayed
1565 in the tui asm layout, with no debug symbols. The value of s
1566 would be 0 here, and select_source_symtab would abort the
1567 command by calling the 'error' function */
1570 TUIDO (((TuiOpaqueFuncPtr
) tui_vSelectSourceSymtab
, s
));
1576 /* Select frame FI, noting that its stack level is LEVEL. Also print
1577 the stack frame and show the source if this is the tui version. */
1579 select_and_print_frame (struct frame_info
*fi
, int level
)
1581 select_frame (fi
, level
);
1584 print_stack_frame (fi
, level
, 1);
1585 TUIDO (((TuiOpaqueFuncPtr
) tui_vCheckDataValues
, fi
));
1590 /* Select frame FI, noting that its stack level is LEVEL. Be silent if
1594 select_and_maybe_print_frame (struct frame_info
*fi
, int level
)
1597 select_frame (fi
, level
);
1599 select_and_print_frame (fi
, level
);
1604 /* Store the selected frame and its level into *FRAMEP and *LEVELP.
1605 If there is no selected frame, *FRAMEP is set to NULL. */
1608 record_selected_frame (CORE_ADDR
*frameaddrp
, int *levelp
)
1610 *frameaddrp
= selected_frame
? selected_frame
->frame
: 0;
1611 *levelp
= selected_frame_level
;
1614 /* Return the symbol-block in which the selected frame is executing.
1615 Can return zero under various legitimate circumstances. */
1618 get_selected_block (void)
1620 if (!target_has_stack
)
1623 if (!selected_frame
)
1624 return get_current_block ();
1625 return get_frame_block (selected_frame
);
1628 /* Find a frame a certain number of levels away from FRAME.
1629 LEVEL_OFFSET_PTR points to an int containing the number of levels.
1630 Positive means go to earlier frames (up); negative, the reverse.
1631 The int that contains the number of levels is counted toward
1632 zero as the frames for those levels are found.
1633 If the top or bottom frame is reached, that frame is returned,
1634 but the final value of *LEVEL_OFFSET_PTR is nonzero and indicates
1635 how much farther the original request asked to go. */
1638 find_relative_frame (register struct frame_info
*frame
,
1639 register int *level_offset_ptr
)
1641 register struct frame_info
*prev
;
1642 register struct frame_info
*frame1
;
1644 /* Going up is simple: just do get_prev_frame enough times
1645 or until initial frame is reached. */
1646 while (*level_offset_ptr
> 0)
1648 prev
= get_prev_frame (frame
);
1651 (*level_offset_ptr
)--;
1654 /* Going down is just as simple. */
1655 if (*level_offset_ptr
< 0)
1657 while (*level_offset_ptr
< 0)
1659 frame1
= get_next_frame (frame
);
1663 (*level_offset_ptr
)++;
1669 /* The "select_frame" command. With no arg, NOP.
1670 With arg LEVEL_EXP, select the frame at level LEVEL if it is a
1671 valid level. Otherwise, treat level_exp as an address expression
1672 and select it. See parse_frame_specification for more info on proper
1673 frame expressions. */
1678 select_frame_command_wrapper (char *level_exp
, int from_tty
)
1680 select_frame_command (level_exp
, from_tty
);
1684 select_frame_command (char *level_exp
, int from_tty
)
1686 register struct frame_info
*frame
, *frame1
;
1687 unsigned int level
= 0;
1689 if (!target_has_stack
)
1690 error ("No stack.");
1692 frame
= parse_frame_specification (level_exp
);
1694 /* Try to figure out what level this frame is. But if there is
1695 no current stack, don't error out -- let the user set one. */
1697 if (get_current_frame ())
1699 for (frame1
= get_prev_frame (0);
1700 frame1
&& frame1
!= frame
;
1701 frame1
= get_prev_frame (frame1
))
1708 select_frame (frame
, level
);
1711 /* The "frame" command. With no arg, print selected frame briefly.
1712 With arg, behaves like select_frame and then prints the selected
1716 frame_command (char *level_exp
, int from_tty
)
1718 select_frame_command (level_exp
, from_tty
);
1719 show_and_print_stack_frame (selected_frame
, selected_frame_level
, 1);
1722 /* The XDB Compatibility command to print the current frame. */
1725 current_frame_command (char *level_exp
, int from_tty
)
1727 if (target_has_stack
== 0 || selected_frame
== 0)
1728 error ("No stack.");
1729 print_only_stack_frame (selected_frame
, selected_frame_level
, 1);
1732 /* Select the frame up one or COUNT stack levels
1733 from the previously selected frame, and print it briefly. */
1737 up_silently_base (char *count_exp
)
1739 register struct frame_info
*fi
;
1740 int count
= 1, count1
;
1742 count
= parse_and_eval_long (count_exp
);
1745 if (target_has_stack
== 0 || selected_frame
== 0)
1746 error ("No stack.");
1748 fi
= find_relative_frame (selected_frame
, &count1
);
1749 if (count1
!= 0 && count_exp
== 0)
1750 error ("Initial frame selected; you cannot go up.");
1751 select_frame (fi
, selected_frame_level
+ count
- count1
);
1755 up_silently_command (char *count_exp
, int from_tty
)
1757 up_silently_base (count_exp
);
1759 print_stack_frame (selected_frame
, selected_frame_level
, 1);
1763 up_command (char *count_exp
, int from_tty
)
1765 up_silently_base (count_exp
);
1766 show_and_print_stack_frame (selected_frame
, selected_frame_level
, 1);
1769 /* Select the frame down one or COUNT stack levels
1770 from the previously selected frame, and print it briefly. */
1774 down_silently_base (char *count_exp
)
1776 register struct frame_info
*frame
;
1777 int count
= -1, count1
;
1779 count
= -parse_and_eval_long (count_exp
);
1782 if (target_has_stack
== 0 || selected_frame
== 0)
1783 error ("No stack.");
1785 frame
= find_relative_frame (selected_frame
, &count1
);
1786 if (count1
!= 0 && count_exp
== 0)
1789 /* We only do this if count_exp is not specified. That way "down"
1790 means to really go down (and let me know if that is
1791 impossible), but "down 9999" can be used to mean go all the way
1792 down without getting an error. */
1794 error ("Bottom (i.e., innermost) frame selected; you cannot go down.");
1797 select_frame (frame
, selected_frame_level
+ count
- count1
);
1802 down_silently_command (char *count_exp
, int from_tty
)
1804 down_silently_base (count_exp
);
1806 print_stack_frame (selected_frame
, selected_frame_level
, 1);
1810 down_command (char *count_exp
, int from_tty
)
1812 down_silently_base (count_exp
);
1813 show_and_print_stack_frame (selected_frame
, selected_frame_level
, 1);
1818 return_command_wrapper (char *retval_exp
, int from_tty
)
1820 return_command (retval_exp
, from_tty
);
1824 return_command (char *retval_exp
, int from_tty
)
1826 struct symbol
*thisfun
;
1827 CORE_ADDR selected_frame_addr
;
1828 CORE_ADDR selected_frame_pc
;
1829 struct frame_info
*frame
;
1830 value_ptr return_value
= NULL
;
1832 if (selected_frame
== NULL
)
1833 error ("No selected frame.");
1834 thisfun
= get_frame_function (selected_frame
);
1835 selected_frame_addr
= FRAME_FP (selected_frame
);
1836 selected_frame_pc
= selected_frame
->pc
;
1838 /* Compute the return value (if any -- possibly getting errors here). */
1842 struct type
*return_type
= NULL
;
1844 return_value
= parse_and_eval (retval_exp
);
1846 /* Cast return value to the return type of the function. */
1847 if (thisfun
!= NULL
)
1848 return_type
= TYPE_TARGET_TYPE (SYMBOL_TYPE (thisfun
));
1849 if (return_type
== NULL
)
1850 return_type
= builtin_type_int
;
1851 return_value
= value_cast (return_type
, return_value
);
1853 /* Make sure we have fully evaluated it, since
1854 it might live in the stack frame we're about to pop. */
1855 if (VALUE_LAZY (return_value
))
1856 value_fetch_lazy (return_value
);
1859 /* If interactive, require confirmation. */
1865 if (!query ("Make %s return now? ", SYMBOL_SOURCE_NAME (thisfun
)))
1867 error ("Not confirmed.");
1871 else if (!query ("Make selected stack frame return now? "))
1872 error ("Not confirmed.");
1875 /* Do the real work. Pop until the specified frame is current. We
1876 use this method because the selected_frame is not valid after
1877 a POP_FRAME. The pc comparison makes this work even if the
1878 selected frame shares its fp with another frame. */
1880 while (selected_frame_addr
!= (frame
= get_current_frame ())->frame
1881 || selected_frame_pc
!= frame
->pc
)
1884 /* Then pop that frame. */
1888 /* Compute the return value (if any) and store in the place
1889 for return values. */
1892 set_return_value (return_value
);
1894 /* If we are at the end of a call dummy now, pop the dummy frame too. */
1896 if (CALL_DUMMY_HAS_COMPLETED (read_pc(), read_sp (),
1897 FRAME_FP (get_current_frame ())))
1900 /* If interactive, print the frame that is now current. */
1903 frame_command ("0", 1);
1905 select_frame_command ("0", 0);
1908 /* Sets the scope to input function name, provided that the
1909 function is within the current stack frame */
1911 struct function_bounds
1913 CORE_ADDR low
, high
;
1916 static void func_command (char *arg
, int from_tty
);
1918 func_command (char *arg
, int from_tty
)
1920 struct frame_info
*fp
;
1922 struct symtabs_and_lines sals
;
1925 struct function_bounds
*func_bounds
= (struct function_bounds
*) NULL
;
1927 if (arg
!= (char *) NULL
)
1930 fp
= parse_frame_specification ("0");
1931 sals
= decode_line_spec (arg
, 1);
1932 func_bounds
= (struct function_bounds
*) xmalloc (
1933 sizeof (struct function_bounds
) * sals
.nelts
);
1934 for (i
= 0; (i
< sals
.nelts
&& !found
); i
++)
1936 if (sals
.sals
[i
].pc
== (CORE_ADDR
) 0 ||
1937 find_pc_partial_function (sals
.sals
[i
].pc
,
1939 &func_bounds
[i
].low
,
1940 &func_bounds
[i
].high
) == 0)
1942 func_bounds
[i
].low
=
1943 func_bounds
[i
].high
= (CORE_ADDR
) NULL
;
1949 for (i
= 0; (i
< sals
.nelts
&& !found
); i
++)
1950 found
= (fp
->pc
>= func_bounds
[i
].low
&&
1951 fp
->pc
< func_bounds
[i
].high
);
1955 fp
= find_relative_frame (fp
, &level
);
1958 while (!found
&& level
== 0);
1961 xfree (func_bounds
);
1964 printf_filtered ("'%s' not within current stack frame.\n", arg
);
1965 else if (fp
!= selected_frame
)
1966 select_and_print_frame (fp
, level
);
1969 /* Gets the language of the current frame. */
1972 get_frame_language (void)
1974 register struct symtab
*s
;
1975 enum language flang
; /* The language of the current frame */
1979 s
= find_pc_symtab (selected_frame
->pc
);
1981 flang
= s
->language
;
1983 flang
= language_unknown
;
1986 flang
= language_unknown
;
1992 _initialize_stack (void)
1995 backtrace_limit
= 30;
1998 add_com ("return", class_stack
, return_command
,
1999 "Make selected stack frame return to its caller.\n\
2000 Control remains in the debugger, but when you continue\n\
2001 execution will resume in the frame above the one now selected.\n\
2002 If an argument is given, it is an expression for the value to return.");
2004 add_com ("up", class_stack
, up_command
,
2005 "Select and print stack frame that called this one.\n\
2006 An argument says how many frames up to go.");
2007 add_com ("up-silently", class_support
, up_silently_command
,
2008 "Same as the `up' command, but does not print anything.\n\
2009 This is useful in command scripts.");
2011 add_com ("down", class_stack
, down_command
,
2012 "Select and print stack frame called by this one.\n\
2013 An argument says how many frames down to go.");
2014 add_com_alias ("do", "down", class_stack
, 1);
2015 add_com_alias ("dow", "down", class_stack
, 1);
2016 add_com ("down-silently", class_support
, down_silently_command
,
2017 "Same as the `down' command, but does not print anything.\n\
2018 This is useful in command scripts.");
2020 add_com ("frame", class_stack
, frame_command
,
2021 "Select and print a stack frame.\n\
2022 With no argument, print the selected stack frame. (See also \"info frame\").\n\
2023 An argument specifies the frame to select.\n\
2024 It can be a stack frame number or the address of the frame.\n\
2025 With argument, nothing is printed if input is coming from\n\
2026 a command file or a user-defined command.");
2028 add_com_alias ("f", "frame", class_stack
, 1);
2032 add_com ("L", class_stack
, current_frame_command
,
2033 "Print the current stack frame.\n");
2034 add_com_alias ("V", "frame", class_stack
, 1);
2036 add_com ("select-frame", class_stack
, select_frame_command
,
2037 "Select a stack frame without printing anything.\n\
2038 An argument specifies the frame to select.\n\
2039 It can be a stack frame number or the address of the frame.\n");
2041 add_com ("backtrace", class_stack
, backtrace_command
,
2042 "Print backtrace of all stack frames, or innermost COUNT frames.\n\
2043 With a negative argument, print outermost -COUNT frames.\n\
2044 Use of the 'full' qualifier also prints the values of the local variables.\n");
2045 add_com_alias ("bt", "backtrace", class_stack
, 0);
2048 add_com_alias ("t", "backtrace", class_stack
, 0);
2049 add_com ("T", class_stack
, backtrace_full_command
,
2050 "Print backtrace of all stack frames, or innermost COUNT frames \n\
2051 and the values of the local variables.\n\
2052 With a negative argument, print outermost -COUNT frames.\n\
2053 Usage: T <count>\n");
2056 add_com_alias ("where", "backtrace", class_alias
, 0);
2057 add_info ("stack", backtrace_command
,
2058 "Backtrace of the stack, or innermost COUNT frames.");
2059 add_info_alias ("s", "stack", 1);
2060 add_info ("frame", frame_info
,
2061 "All about selected stack frame, or frame at ADDR.");
2062 add_info_alias ("f", "frame", 1);
2063 add_info ("locals", locals_info
,
2064 "Local variables of current stack frame.");
2065 add_info ("args", args_info
,
2066 "Argument variables of current stack frame.");
2068 add_com ("l", class_info
, args_plus_locals_info
,
2069 "Argument and local variables of current stack frame.");
2072 add_com ("func", class_stack
, func_command
,
2073 "Select the stack frame that contains <func>.\nUsage: func <name>\n");
2075 add_info ("catch", catch_info
,
2076 "Exceptions that can be caught in the current stack frame.");
2079 add_cmd ("backtrace-limit", class_stack
, set_backtrace_limit_command
,
2080 "Specify maximum number of frames for \"backtrace\" to print by default.",
2082 add_info ("backtrace-limit", backtrace_limit_info
,
2083 "The maximum number of frames for \"backtrace\" to print by default.");