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 ui_out_list_begin (uiout
, "frame");
535 list_chain
= make_cleanup_ui_out_list_end (uiout
);
541 ui_out_text (uiout
, "#");
542 ui_out_field_fmt (uiout
, "level", "%-2d", level
);
543 ui_out_spaces (uiout
, 1);
545 printf_filtered ("#%-2d ", level
);
549 if (fi
->pc
!= sal
.pc
|| !sal
.symtab
|| source
== LOC_AND_ADDRESS
)
551 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 print_address_numeric (fi
->pc
, 1, gdb_stdout
);
558 annotate_frame_address_end ();
559 printf_filtered (" in ");
562 annotate_frame_function_name ();
564 fprintf_symbol_filtered (stb
->stream
, funname
? funname
: "??", funlang
,
566 ui_out_field_stream (uiout
, "func", stb
);
567 ui_out_wrap_hint (uiout
, " ");
569 fprintf_symbol_filtered (gdb_stdout
, funname
? funname
: "??", funlang
,
573 annotate_frame_args ();
576 ui_out_text (uiout
, " (");
578 fputs_filtered (" (", gdb_stdout
);
582 struct print_args_args args
;
585 args
.stream
= gdb_stdout
;
587 ui_out_list_begin (uiout
, "args");
588 catch_errors (print_args_stub
, &args
, "", RETURN_MASK_ALL
);
589 /* FIXME: args must be a list. If one argument is a string it will
590 have " that will not be properly escaped. */
591 ui_out_list_end (uiout
);
593 catch_errors (print_args_stub
, &args
, "", RETURN_MASK_ALL
);
598 ui_out_text (uiout
, ")");
600 printf_filtered (")");
602 if (sal
.symtab
&& sal
.symtab
->filename
)
604 annotate_frame_source_begin ();
606 ui_out_wrap_hint (uiout
, " ");
607 ui_out_text (uiout
, " at ");
608 annotate_frame_source_file ();
609 ui_out_field_string (uiout
, "file", sal
.symtab
->filename
);
610 annotate_frame_source_file_end ();
611 ui_out_text (uiout
, ":");
612 annotate_frame_source_line ();
613 ui_out_field_int (uiout
, "line", sal
.line
);
616 printf_filtered (" at ");
617 annotate_frame_source_file ();
618 printf_filtered ("%s", sal
.symtab
->filename
);
619 annotate_frame_source_file_end ();
620 printf_filtered (":");
621 annotate_frame_source_line ();
622 printf_filtered ("%d", sal
.line
);
624 annotate_frame_source_end ();
628 if (!funname
|| (!sal
.symtab
|| !sal
.symtab
->filename
))
630 char *lib
= PC_SOLIB (fi
->pc
);
633 annotate_frame_where ();
635 ui_out_wrap_hint (uiout
, " ");
636 ui_out_text (uiout
, " from ");
637 ui_out_field_string (uiout
, "from", lib
);
640 printf_filtered (" from %s", lib
);
644 #endif /* PC_SOLIB */
647 /* do_cleanups will call ui_out_list_end() for us. */
648 do_cleanups (list_chain
);
649 ui_out_text (uiout
, "\n");
650 do_cleanups (old_chain
);
652 printf_filtered ("\n");
659 stack_publish_stopped_with_no_frame (void)
661 TUIDO (((TuiOpaqueFuncPtr
) tuiUpdateOnEnd
));
667 /* Show or print the frame info. If this is the tui, it will be shown in
668 the source display */
670 print_frame_info (struct frame_info
*fi
, register int level
, int source
,
674 print_frame_info_base (fi
, level
, source
, args
);
677 if (fi
&& (frame_in_dummy (fi
) || fi
->signal_handler_caller
))
678 print_frame_info_base (fi
, level
, source
, args
);
681 TUIDO (((TuiOpaqueFuncPtr
) tui_vShowFrameInfo
, fi
));
686 /* Show the frame info. If this is the tui, it will be shown in
687 the source display otherwise, nothing is done */
689 show_stack_frame (struct frame_info
*fi
)
691 TUIDO (((TuiOpaqueFuncPtr
) tui_vShowFrameInfo
, fi
));
695 /* Read a frame specification in whatever the appropriate format is.
696 Call error() if the specification is in any way invalid (i.e.
697 this function never returns NULL). */
700 parse_frame_specification (char *frame_exp
)
704 CORE_ADDR args
[MAXARGS
];
709 char *addr_string
, *p
;
710 struct cleanup
*tmp_cleanup
;
712 while (*frame_exp
== ' ')
717 if (numargs
> MAXARGS
)
718 error ("Too many args in frame specification");
719 /* Parse an argument. */
720 for (p
= frame_exp
; *p
&& *p
!= ' '; p
++)
722 addr_string
= savestring (frame_exp
, p
- frame_exp
);
727 tmp_cleanup
= make_cleanup (xfree
, addr_string
);
729 /* NOTE: we call parse_and_eval and then both
730 value_as_long and value_as_pointer rather than calling
731 parse_and_eval_long and parse_and_eval_address because
732 of the issue of potential side effects from evaluating
734 vp
= parse_and_eval (addr_string
);
736 level
= value_as_long (vp
);
738 args
[numargs
++] = value_as_pointer (vp
);
739 do_cleanups (tmp_cleanup
);
742 /* Skip spaces, move to possible next arg. */
752 if (selected_frame
== NULL
)
753 error ("No selected frame.");
754 return selected_frame
;
758 struct frame_info
*fid
=
759 find_relative_frame (get_current_frame (), &level
);
760 struct frame_info
*tfid
;
763 /* find_relative_frame was successful */
766 /* If SETUP_ARBITRARY_FRAME is defined, then frame specifications
767 take at least 2 addresses. It is important to detect this case
768 here so that "frame 100" does not give a confusing error message
769 like "frame specification requires two addresses". This of course
770 does not solve the "frame 100" problem for machines on which
771 a frame specification can be made with one address. To solve
772 that, we need a new syntax for a specifying a frame by address.
773 I think the cleanest syntax is $frame(0x45) ($frame(0x23,0x45) for
774 two args, etc.), but people might think that is too much typing,
775 so I guess *0x23,0x45 would be a possible alternative (commas
776 really should be used instead of spaces to delimit; using spaces
777 normally works in an expression). */
778 #ifdef SETUP_ARBITRARY_FRAME
779 error ("No frame %d", args
[0]);
782 /* If (s)he specifies the frame with an address, he deserves what
783 (s)he gets. Still, give the highest one that matches. */
785 for (fid
= get_current_frame ();
786 fid
&& fid
->frame
!= args
[0];
787 fid
= get_prev_frame (fid
))
791 while ((tfid
= get_prev_frame (fid
)) &&
792 (tfid
->frame
== args
[0]))
795 /* We couldn't identify the frame as an existing frame, but
796 perhaps we can create one with a single argument. */
800 #ifdef SETUP_ARBITRARY_FRAME
801 return SETUP_ARBITRARY_FRAME (numargs
, args
);
803 /* Usual case. Do it here rather than have everyone supply
804 a SETUP_ARBITRARY_FRAME that does this. */
806 return create_new_frame (args
[0], 0);
807 error ("Too many args in frame specification");
814 /* FRAME_ARGS_ADDRESS_CORRECT is just like FRAME_ARGS_ADDRESS except
815 that if it is unsure about the answer, it returns 0
816 instead of guessing (this happens on the VAX and i960, for example).
818 On most machines, we never have to guess about the args address,
819 so FRAME_ARGS_ADDRESS{,_CORRECT} are the same. */
820 #if !defined (FRAME_ARGS_ADDRESS_CORRECT)
821 #define FRAME_ARGS_ADDRESS_CORRECT FRAME_ARGS_ADDRESS
824 /* Print verbosely the selected frame or the frame at address ADDR.
825 This means absolutely all information in the frame is printed. */
828 frame_info (char *addr_exp
, int from_tty
)
830 struct frame_info
*fi
;
831 struct symtab_and_line sal
;
834 struct frame_info
*calling_frame_info
;
835 int i
, count
, numregs
;
837 enum language funlang
= language_unknown
;
839 if (!target_has_stack
)
842 fi
= parse_frame_specification (addr_exp
);
844 error ("Invalid frame specified.");
846 sal
= find_pc_line (fi
->pc
,
848 && !fi
->next
->signal_handler_caller
849 && !frame_in_dummy (fi
->next
));
850 func
= get_frame_function (fi
);
851 s
= find_pc_symtab (fi
->pc
);
854 /* I'd like to use SYMBOL_SOURCE_NAME() here, to display
855 * the demangled name that we already have stored in
856 * the symbol table, but we stored a version with
857 * DMGL_PARAMS turned on, and here we don't want
858 * to display parameters. So call the demangler again,
859 * with DMGL_ANSI only. RT
860 * (Yes, I know that printf_symbol_filtered() will
861 * again try to demangle the name on the fly, but
862 * the issue is that if cplus_demangle() fails here,
863 * it'll fail there too. So we want to catch the failure
864 * ("demangled==NULL" case below) here, while we still
865 * have our hands on the function symbol.)
868 funname
= SYMBOL_NAME (func
);
869 funlang
= SYMBOL_LANGUAGE (func
);
870 if (funlang
== language_cplus
)
872 demangled
= cplus_demangle (funname
, DMGL_ANSI
);
873 /* If the demangler fails, try the demangled name
874 * from the symbol table. This'll have parameters,
875 * but that's preferable to diplaying a mangled name.
877 if (demangled
== NULL
)
878 funname
= SYMBOL_SOURCE_NAME (func
);
883 register struct minimal_symbol
*msymbol
= lookup_minimal_symbol_by_pc (fi
->pc
);
886 funname
= SYMBOL_NAME (msymbol
);
887 funlang
= SYMBOL_LANGUAGE (msymbol
);
890 calling_frame_info
= get_prev_frame (fi
);
892 if (!addr_exp
&& selected_frame_level
>= 0)
894 printf_filtered ("Stack level %d, frame at ", selected_frame_level
);
895 print_address_numeric (fi
->frame
, 1, gdb_stdout
);
896 printf_filtered (":\n");
900 printf_filtered ("Stack frame at ");
901 print_address_numeric (fi
->frame
, 1, gdb_stdout
);
902 printf_filtered (":\n");
904 printf_filtered (" %s = ", REGISTER_NAME (PC_REGNUM
));
905 print_address_numeric (fi
->pc
, 1, gdb_stdout
);
910 printf_filtered (" in ");
911 fprintf_symbol_filtered (gdb_stdout
, funname
, funlang
,
912 DMGL_ANSI
| DMGL_PARAMS
);
916 printf_filtered (" (%s:%d)", sal
.symtab
->filename
, sal
.line
);
917 puts_filtered ("; ");
919 printf_filtered ("saved %s ", REGISTER_NAME (PC_REGNUM
));
920 print_address_numeric (FRAME_SAVED_PC (fi
), 1, gdb_stdout
);
921 printf_filtered ("\n");
925 frameless
= FRAMELESS_FUNCTION_INVOCATION (fi
);
927 printf_filtered (" (FRAMELESS),");
930 if (calling_frame_info
)
932 printf_filtered (" called by frame at ");
933 print_address_numeric (calling_frame_info
->frame
, 1, gdb_stdout
);
935 if (fi
->next
&& calling_frame_info
)
940 printf_filtered (" caller of frame at ");
941 print_address_numeric (fi
->next
->frame
, 1, gdb_stdout
);
943 if (fi
->next
|| calling_frame_info
)
944 puts_filtered ("\n");
946 printf_filtered (" source language %s.\n", language_str (s
->language
));
948 #ifdef PRINT_EXTRA_FRAME_INFO
949 PRINT_EXTRA_FRAME_INFO (fi
);
953 /* Address of the argument list for this frame, or 0. */
954 CORE_ADDR arg_list
= FRAME_ARGS_ADDRESS_CORRECT (fi
);
955 /* Number of args for this frame, or -1 if unknown. */
959 printf_filtered (" Arglist at unknown address.\n");
962 printf_filtered (" Arglist at ");
963 print_address_numeric (arg_list
, 1, gdb_stdout
);
964 printf_filtered (",");
966 numargs
= FRAME_NUM_ARGS (fi
);
968 puts_filtered (" args: ");
969 else if (numargs
== 0)
970 puts_filtered (" no args.");
971 else if (numargs
== 1)
972 puts_filtered (" 1 arg: ");
974 printf_filtered (" %d args: ", numargs
);
975 print_frame_args (func
, fi
, numargs
, gdb_stdout
);
976 puts_filtered ("\n");
980 /* Address of the local variables for this frame, or 0. */
981 CORE_ADDR arg_list
= FRAME_LOCALS_ADDRESS (fi
);
984 printf_filtered (" Locals at unknown address,");
987 printf_filtered (" Locals at ");
988 print_address_numeric (arg_list
, 1, gdb_stdout
);
989 printf_filtered (",");
993 FRAME_INIT_SAVED_REGS (fi
);
994 if (fi
->saved_regs
!= NULL
)
996 /* The sp is special; what's returned isn't the save address, but
997 actually the value of the previous frame's sp. */
998 printf_filtered (" Previous frame's sp is ");
999 print_address_numeric (fi
->saved_regs
[SP_REGNUM
], 1, gdb_stdout
);
1000 printf_filtered ("\n");
1002 numregs
= NUM_REGS
+ NUM_PSEUDO_REGS
;
1003 for (i
= 0; i
< numregs
; i
++)
1004 if (fi
->saved_regs
[i
] && i
!= SP_REGNUM
)
1007 puts_filtered (" Saved registers:\n ");
1009 puts_filtered (",");
1011 printf_filtered (" %s at ", REGISTER_NAME (i
));
1012 print_address_numeric (fi
->saved_regs
[i
], 1, gdb_stdout
);
1016 puts_filtered ("\n");
1020 /* We could get some information about saved registers by
1021 calling get_saved_register on each register. Which info goes
1022 with which frame is necessarily lost, however, and I suspect
1023 that the users don't care whether they get the info. */
1024 puts_filtered ("\n");
1029 /* Set a limit on the number of frames printed by default in a
1032 static int backtrace_limit
;
1035 set_backtrace_limit_command (char *count_exp
, int from_tty
)
1037 int count
= parse_and_eval_long (count_exp
);
1040 error ("Negative argument not meaningful as backtrace limit.");
1042 backtrace_limit
= count
;
1046 backtrace_limit_info (char *arg
, int from_tty
)
1049 error ("\"Info backtrace-limit\" takes no arguments.");
1051 printf_unfiltered ("Backtrace limit: %d.\n", backtrace_limit
);
1055 /* Print briefly all stack frames or just the innermost COUNT frames. */
1057 static void backtrace_command_1 (char *count_exp
, int show_locals
,
1060 backtrace_command_1 (char *count_exp
, int show_locals
, int from_tty
)
1062 struct frame_info
*fi
;
1065 register struct frame_info
*trailing
;
1066 register int trailing_level
;
1068 if (!target_has_stack
)
1069 error ("No stack.");
1071 /* The following code must do two things. First, it must
1072 set the variable TRAILING to the frame from which we should start
1073 printing. Second, it must set the variable count to the number
1074 of frames which we should print, or -1 if all of them. */
1075 trailing
= get_current_frame ();
1077 /* The target can be in a state where there is no valid frames
1078 (e.g., just connected). */
1079 if (trailing
== NULL
)
1080 error ("No stack.");
1085 count
= parse_and_eval_long (count_exp
);
1088 struct frame_info
*current
;
1093 while (current
&& count
--)
1096 current
= get_prev_frame (current
);
1099 /* Will stop when CURRENT reaches the top of the stack. TRAILING
1100 will be COUNT below it. */
1104 trailing
= get_prev_frame (trailing
);
1105 current
= get_prev_frame (current
);
1117 struct partial_symtab
*ps
;
1119 /* Read in symbols for all of the frames. Need to do this in
1120 a separate pass so that "Reading in symbols for xxx" messages
1121 don't screw up the appearance of the backtrace. Also
1122 if people have strong opinions against reading symbols for
1123 backtrace this may have to be an option. */
1127 fi
= get_prev_frame (fi
))
1130 ps
= find_pc_psymtab (fi
->pc
);
1132 PSYMTAB_TO_SYMTAB (ps
); /* Force syms to come in */
1136 for (i
= 0, fi
= trailing
;
1138 i
++, fi
= get_prev_frame (fi
))
1142 /* Don't use print_stack_frame; if an error() occurs it probably
1143 means further attempts to backtrace would fail (on the other
1144 hand, perhaps the code does or could be fixed to make sure
1145 the frame->prev field gets set to NULL in that case). */
1146 print_frame_info_base (fi
, trailing_level
+ i
, 0, 1);
1148 print_frame_local_vars (fi
, 1, gdb_stdout
);
1151 /* If we've stopped before the end, mention that. */
1153 printf_filtered ("(More stack frames follow...)\n");
1157 backtrace_command (char *arg
, int from_tty
)
1159 struct cleanup
*old_chain
= (struct cleanup
*) NULL
;
1160 char **argv
= (char **) NULL
;
1161 int argIndicatingFullTrace
= (-1), totArgLen
= 0, argc
= 0;
1164 if (arg
!= (char *) NULL
)
1168 argv
= buildargv (arg
);
1169 old_chain
= make_cleanup_freeargv (argv
);
1171 for (i
= 0; (argv
[i
] != (char *) NULL
); i
++)
1175 for (j
= 0; (j
< strlen (argv
[i
])); j
++)
1176 argv
[i
][j
] = tolower (argv
[i
][j
]);
1178 if (argIndicatingFullTrace
< 0 && subset_compare (argv
[i
], "full"))
1179 argIndicatingFullTrace
= argc
;
1183 totArgLen
+= strlen (argv
[i
]);
1187 if (argIndicatingFullTrace
>= 0)
1191 argPtr
= (char *) xmalloc (totArgLen
+ 1);
1196 memset (argPtr
, 0, totArgLen
+ 1);
1197 for (i
= 0; (i
< (argc
+ 1)); i
++)
1199 if (i
!= argIndicatingFullTrace
)
1201 strcat (argPtr
, argv
[i
]);
1202 strcat (argPtr
, " ");
1208 argPtr
= (char *) NULL
;
1212 backtrace_command_1 (argPtr
, (argIndicatingFullTrace
>= 0), from_tty
);
1214 if (argIndicatingFullTrace
>= 0 && totArgLen
> 0)
1218 do_cleanups (old_chain
);
1221 static void backtrace_full_command (char *arg
, int from_tty
);
1223 backtrace_full_command (char *arg
, int from_tty
)
1225 backtrace_command_1 (arg
, 1, from_tty
);
1229 /* Print the local variables of a block B active in FRAME.
1230 Return 1 if any variables were printed; 0 otherwise. */
1233 print_block_frame_locals (struct block
*b
, register struct frame_info
*fi
,
1234 int num_tabs
, register struct ui_file
*stream
)
1238 register struct symbol
*sym
;
1239 register int values_printed
= 0;
1241 nsyms
= BLOCK_NSYMS (b
);
1243 for (i
= 0; i
< nsyms
; i
++)
1245 sym
= BLOCK_SYM (b
, i
);
1246 switch (SYMBOL_CLASS (sym
))
1253 for (j
= 0; j
< num_tabs
; j
++)
1254 fputs_filtered ("\t", stream
);
1255 fputs_filtered (SYMBOL_SOURCE_NAME (sym
), stream
);
1256 fputs_filtered (" = ", stream
);
1257 print_variable_value (sym
, fi
, stream
);
1258 fprintf_filtered (stream
, "\n");
1262 /* Ignore symbols which are not locals. */
1266 return values_printed
;
1269 /* Same, but print labels. */
1272 print_block_frame_labels (struct block
*b
, int *have_default
,
1273 register struct ui_file
*stream
)
1277 register struct symbol
*sym
;
1278 register int values_printed
= 0;
1280 nsyms
= BLOCK_NSYMS (b
);
1282 for (i
= 0; i
< nsyms
; i
++)
1284 sym
= BLOCK_SYM (b
, i
);
1285 if (STREQ (SYMBOL_NAME (sym
), "default"))
1291 if (SYMBOL_CLASS (sym
) == LOC_LABEL
)
1293 struct symtab_and_line sal
;
1294 sal
= find_pc_line (SYMBOL_VALUE_ADDRESS (sym
), 0);
1296 fputs_filtered (SYMBOL_SOURCE_NAME (sym
), stream
);
1299 fprintf_filtered (stream
, " ");
1300 print_address_numeric (SYMBOL_VALUE_ADDRESS (sym
), 1, stream
);
1302 fprintf_filtered (stream
, " in file %s, line %d\n",
1303 sal
.symtab
->filename
, sal
.line
);
1306 return values_printed
;
1309 /* Print on STREAM all the local variables in frame FRAME,
1310 including all the blocks active in that frame
1313 Returns 1 if the job was done,
1314 or 0 if nothing was printed because we have no info
1315 on the function running in FRAME. */
1318 print_frame_local_vars (register struct frame_info
*fi
, register int num_tabs
,
1319 register struct ui_file
*stream
)
1321 register struct block
*block
= get_frame_block (fi
);
1322 register int values_printed
= 0;
1326 fprintf_filtered (stream
, "No symbol table info available.\n");
1332 if (print_block_frame_locals (block
, fi
, num_tabs
, stream
))
1334 /* After handling the function's top-level block, stop.
1335 Don't continue to its superblock, the block of
1336 per-file symbols. */
1337 if (BLOCK_FUNCTION (block
))
1339 block
= BLOCK_SUPERBLOCK (block
);
1342 if (!values_printed
)
1344 fprintf_filtered (stream
, "No locals.\n");
1348 /* Same, but print labels. */
1351 print_frame_label_vars (register struct frame_info
*fi
, int this_level_only
,
1352 register struct ui_file
*stream
)
1354 register struct blockvector
*bl
;
1355 register struct block
*block
= get_frame_block (fi
);
1356 register int values_printed
= 0;
1357 int index
, have_default
= 0;
1358 char *blocks_printed
;
1359 CORE_ADDR pc
= fi
->pc
;
1363 fprintf_filtered (stream
, "No symbol table info available.\n");
1367 bl
= blockvector_for_pc (BLOCK_END (block
) - 4, &index
);
1368 blocks_printed
= (char *) alloca (BLOCKVECTOR_NBLOCKS (bl
) * sizeof (char));
1369 memset (blocks_printed
, 0, BLOCKVECTOR_NBLOCKS (bl
) * sizeof (char));
1373 CORE_ADDR end
= BLOCK_END (block
) - 4;
1376 if (bl
!= blockvector_for_pc (end
, &index
))
1377 error ("blockvector blotch");
1378 if (BLOCKVECTOR_BLOCK (bl
, index
) != block
)
1379 error ("blockvector botch");
1380 last_index
= BLOCKVECTOR_NBLOCKS (bl
);
1383 /* Don't print out blocks that have gone by. */
1384 while (index
< last_index
1385 && BLOCK_END (BLOCKVECTOR_BLOCK (bl
, index
)) < pc
)
1388 while (index
< last_index
1389 && BLOCK_END (BLOCKVECTOR_BLOCK (bl
, index
)) < end
)
1391 if (blocks_printed
[index
] == 0)
1393 if (print_block_frame_labels (BLOCKVECTOR_BLOCK (bl
, index
), &have_default
, stream
))
1395 blocks_printed
[index
] = 1;
1401 if (values_printed
&& this_level_only
)
1404 /* After handling the function's top-level block, stop.
1405 Don't continue to its superblock, the block of
1406 per-file symbols. */
1407 if (BLOCK_FUNCTION (block
))
1409 block
= BLOCK_SUPERBLOCK (block
);
1412 if (!values_printed
&& !this_level_only
)
1414 fprintf_filtered (stream
, "No catches.\n");
1420 locals_info (char *args
, int from_tty
)
1422 if (!selected_frame
)
1423 error ("No frame selected.");
1424 print_frame_local_vars (selected_frame
, 0, gdb_stdout
);
1428 catch_info (char *ignore
, int from_tty
)
1430 struct symtab_and_line
*sal
;
1432 /* Check for target support for exception handling */
1433 sal
= target_enable_exception_callback (EX_EVENT_CATCH
, 1);
1436 /* Currently not handling this */
1437 /* Ideally, here we should interact with the C++ runtime
1438 system to find the list of active handlers, etc. */
1439 fprintf_filtered (gdb_stdout
, "Info catch not supported with this target/compiler combination.\n");
1441 if (!selected_frame
)
1442 error ("No frame selected.");
1447 /* Assume g++ compiled code -- old v 4.16 behaviour */
1448 if (!selected_frame
)
1449 error ("No frame selected.");
1451 print_frame_label_vars (selected_frame
, 0, gdb_stdout
);
1456 print_frame_arg_vars (register struct frame_info
*fi
,
1457 register struct ui_file
*stream
)
1459 struct symbol
*func
= get_frame_function (fi
);
1460 register struct block
*b
;
1463 register struct symbol
*sym
, *sym2
;
1464 register int values_printed
= 0;
1468 fprintf_filtered (stream
, "No symbol table info available.\n");
1472 b
= SYMBOL_BLOCK_VALUE (func
);
1473 nsyms
= BLOCK_NSYMS (b
);
1475 for (i
= 0; i
< nsyms
; i
++)
1477 sym
= BLOCK_SYM (b
, i
);
1478 switch (SYMBOL_CLASS (sym
))
1484 case LOC_REGPARM_ADDR
:
1485 case LOC_BASEREG_ARG
:
1487 fputs_filtered (SYMBOL_SOURCE_NAME (sym
), stream
);
1488 fputs_filtered (" = ", stream
);
1490 /* We have to look up the symbol because arguments can have
1491 two entries (one a parameter, one a local) and the one we
1492 want is the local, which lookup_symbol will find for us.
1493 This includes gcc1 (not gcc2) on the sparc when passing a
1494 small structure and gcc2 when the argument type is float
1495 and it is passed as a double and converted to float by
1496 the prologue (in the latter case the type of the LOC_ARG
1497 symbol is double and the type of the LOC_LOCAL symbol is
1498 float). There are also LOC_ARG/LOC_REGISTER pairs which
1499 are not combined in symbol-reading. */
1501 sym2
= lookup_symbol (SYMBOL_NAME (sym
),
1502 b
, VAR_NAMESPACE
, (int *) NULL
, (struct symtab
**) NULL
);
1503 print_variable_value (sym2
, fi
, stream
);
1504 fprintf_filtered (stream
, "\n");
1508 /* Don't worry about things which aren't arguments. */
1513 if (!values_printed
)
1515 fprintf_filtered (stream
, "No arguments.\n");
1520 args_info (char *ignore
, int from_tty
)
1522 if (!selected_frame
)
1523 error ("No frame selected.");
1524 print_frame_arg_vars (selected_frame
, gdb_stdout
);
1529 args_plus_locals_info (char *ignore
, int from_tty
)
1531 args_info (ignore
, from_tty
);
1532 locals_info (ignore
, from_tty
);
1536 /* Select frame FI, and note that its stack level is LEVEL.
1537 LEVEL may be -1 if an actual level number is not known. */
1540 select_frame (struct frame_info
*fi
, int level
)
1542 register struct symtab
*s
;
1544 selected_frame
= fi
;
1545 selected_frame_level
= level
;
1546 if (selected_frame_level_changed_hook
)
1547 selected_frame_level_changed_hook (level
);
1549 /* Ensure that symbols for this frame are read in. Also, determine the
1550 source language of this frame, and switch to it if desired. */
1553 s
= find_pc_symtab (fi
->pc
);
1555 && s
->language
!= current_language
->la_language
1556 && s
->language
!= language_unknown
1557 && language_mode
== language_mode_auto
)
1559 set_language (s
->language
);
1561 /* elz: this if here fixes the problem with the pc not being displayed
1562 in the tui asm layout, with no debug symbols. The value of s
1563 would be 0 here, and select_source_symtab would abort the
1564 command by calling the 'error' function */
1567 TUIDO (((TuiOpaqueFuncPtr
) tui_vSelectSourceSymtab
, s
));
1573 /* Select frame FI, noting that its stack level is LEVEL. Also print
1574 the stack frame and show the source if this is the tui version. */
1576 select_and_print_frame (struct frame_info
*fi
, int level
)
1578 select_frame (fi
, level
);
1581 print_stack_frame (fi
, level
, 1);
1582 TUIDO (((TuiOpaqueFuncPtr
) tui_vCheckDataValues
, fi
));
1587 /* Select frame FI, noting that its stack level is LEVEL. Be silent if
1591 select_and_maybe_print_frame (struct frame_info
*fi
, int level
)
1594 select_frame (fi
, level
);
1596 select_and_print_frame (fi
, level
);
1601 /* Store the selected frame and its level into *FRAMEP and *LEVELP.
1602 If there is no selected frame, *FRAMEP is set to NULL. */
1605 record_selected_frame (CORE_ADDR
*frameaddrp
, int *levelp
)
1607 *frameaddrp
= selected_frame
? selected_frame
->frame
: 0;
1608 *levelp
= selected_frame_level
;
1611 /* Return the symbol-block in which the selected frame is executing.
1612 Can return zero under various legitimate circumstances. */
1615 get_selected_block (void)
1617 if (!target_has_stack
)
1620 if (!selected_frame
)
1621 return get_current_block ();
1622 return get_frame_block (selected_frame
);
1625 /* Find a frame a certain number of levels away from FRAME.
1626 LEVEL_OFFSET_PTR points to an int containing the number of levels.
1627 Positive means go to earlier frames (up); negative, the reverse.
1628 The int that contains the number of levels is counted toward
1629 zero as the frames for those levels are found.
1630 If the top or bottom frame is reached, that frame is returned,
1631 but the final value of *LEVEL_OFFSET_PTR is nonzero and indicates
1632 how much farther the original request asked to go. */
1635 find_relative_frame (register struct frame_info
*frame
,
1636 register int *level_offset_ptr
)
1638 register struct frame_info
*prev
;
1639 register struct frame_info
*frame1
;
1641 /* Going up is simple: just do get_prev_frame enough times
1642 or until initial frame is reached. */
1643 while (*level_offset_ptr
> 0)
1645 prev
= get_prev_frame (frame
);
1648 (*level_offset_ptr
)--;
1651 /* Going down is just as simple. */
1652 if (*level_offset_ptr
< 0)
1654 while (*level_offset_ptr
< 0)
1656 frame1
= get_next_frame (frame
);
1660 (*level_offset_ptr
)++;
1666 /* The "select_frame" command. With no arg, NOP.
1667 With arg LEVEL_EXP, select the frame at level LEVEL if it is a
1668 valid level. Otherwise, treat level_exp as an address expression
1669 and select it. See parse_frame_specification for more info on proper
1670 frame expressions. */
1675 select_frame_command_wrapper (char *level_exp
, int from_tty
)
1677 select_frame_command (level_exp
, from_tty
);
1681 select_frame_command (char *level_exp
, int from_tty
)
1683 register struct frame_info
*frame
, *frame1
;
1684 unsigned int level
= 0;
1686 if (!target_has_stack
)
1687 error ("No stack.");
1689 frame
= parse_frame_specification (level_exp
);
1691 /* Try to figure out what level this frame is. But if there is
1692 no current stack, don't error out -- let the user set one. */
1694 if (get_current_frame ())
1696 for (frame1
= get_prev_frame (0);
1697 frame1
&& frame1
!= frame
;
1698 frame1
= get_prev_frame (frame1
))
1705 select_frame (frame
, level
);
1708 /* The "frame" command. With no arg, print selected frame briefly.
1709 With arg, behaves like select_frame and then prints the selected
1713 frame_command (char *level_exp
, int from_tty
)
1715 select_frame_command (level_exp
, from_tty
);
1716 show_and_print_stack_frame (selected_frame
, selected_frame_level
, 1);
1719 /* The XDB Compatibility command to print the current frame. */
1722 current_frame_command (char *level_exp
, int from_tty
)
1724 if (target_has_stack
== 0 || selected_frame
== 0)
1725 error ("No stack.");
1726 print_only_stack_frame (selected_frame
, selected_frame_level
, 1);
1729 /* Select the frame up one or COUNT stack levels
1730 from the previously selected frame, and print it briefly. */
1734 up_silently_base (char *count_exp
)
1736 register struct frame_info
*fi
;
1737 int count
= 1, count1
;
1739 count
= parse_and_eval_long (count_exp
);
1742 if (target_has_stack
== 0 || selected_frame
== 0)
1743 error ("No stack.");
1745 fi
= find_relative_frame (selected_frame
, &count1
);
1746 if (count1
!= 0 && count_exp
== 0)
1747 error ("Initial frame selected; you cannot go up.");
1748 select_frame (fi
, selected_frame_level
+ count
- count1
);
1752 up_silently_command (char *count_exp
, int from_tty
)
1754 up_silently_base (count_exp
);
1756 print_stack_frame (selected_frame
, selected_frame_level
, 1);
1760 up_command (char *count_exp
, int from_tty
)
1762 up_silently_base (count_exp
);
1763 show_and_print_stack_frame (selected_frame
, selected_frame_level
, 1);
1766 /* Select the frame down one or COUNT stack levels
1767 from the previously selected frame, and print it briefly. */
1771 down_silently_base (char *count_exp
)
1773 register struct frame_info
*frame
;
1774 int count
= -1, count1
;
1776 count
= -parse_and_eval_long (count_exp
);
1779 if (target_has_stack
== 0 || selected_frame
== 0)
1780 error ("No stack.");
1782 frame
= find_relative_frame (selected_frame
, &count1
);
1783 if (count1
!= 0 && count_exp
== 0)
1786 /* We only do this if count_exp is not specified. That way "down"
1787 means to really go down (and let me know if that is
1788 impossible), but "down 9999" can be used to mean go all the way
1789 down without getting an error. */
1791 error ("Bottom (i.e., innermost) frame selected; you cannot go down.");
1794 select_frame (frame
, selected_frame_level
+ count
- count1
);
1799 down_silently_command (char *count_exp
, int from_tty
)
1801 down_silently_base (count_exp
);
1803 print_stack_frame (selected_frame
, selected_frame_level
, 1);
1807 down_command (char *count_exp
, int from_tty
)
1809 down_silently_base (count_exp
);
1810 show_and_print_stack_frame (selected_frame
, selected_frame_level
, 1);
1815 return_command_wrapper (char *retval_exp
, int from_tty
)
1817 return_command (retval_exp
, from_tty
);
1821 return_command (char *retval_exp
, int from_tty
)
1823 struct symbol
*thisfun
;
1824 CORE_ADDR selected_frame_addr
;
1825 CORE_ADDR selected_frame_pc
;
1826 struct frame_info
*frame
;
1827 value_ptr return_value
= NULL
;
1829 if (selected_frame
== NULL
)
1830 error ("No selected frame.");
1831 thisfun
= get_frame_function (selected_frame
);
1832 selected_frame_addr
= FRAME_FP (selected_frame
);
1833 selected_frame_pc
= selected_frame
->pc
;
1835 /* Compute the return value (if any -- possibly getting errors here). */
1839 struct type
*return_type
= NULL
;
1841 return_value
= parse_and_eval (retval_exp
);
1843 /* Cast return value to the return type of the function. */
1844 if (thisfun
!= NULL
)
1845 return_type
= TYPE_TARGET_TYPE (SYMBOL_TYPE (thisfun
));
1846 if (return_type
== NULL
)
1847 return_type
= builtin_type_int
;
1848 return_value
= value_cast (return_type
, return_value
);
1850 /* Make sure we have fully evaluated it, since
1851 it might live in the stack frame we're about to pop. */
1852 if (VALUE_LAZY (return_value
))
1853 value_fetch_lazy (return_value
);
1856 /* If interactive, require confirmation. */
1862 if (!query ("Make %s return now? ", SYMBOL_SOURCE_NAME (thisfun
)))
1864 error ("Not confirmed.");
1868 else if (!query ("Make selected stack frame return now? "))
1869 error ("Not confirmed.");
1872 /* Do the real work. Pop until the specified frame is current. We
1873 use this method because the selected_frame is not valid after
1874 a POP_FRAME. The pc comparison makes this work even if the
1875 selected frame shares its fp with another frame. */
1877 while (selected_frame_addr
!= (frame
= get_current_frame ())->frame
1878 || selected_frame_pc
!= frame
->pc
)
1881 /* Then pop that frame. */
1885 /* Compute the return value (if any) and store in the place
1886 for return values. */
1889 set_return_value (return_value
);
1891 /* If we are at the end of a call dummy now, pop the dummy frame too. */
1893 if (CALL_DUMMY_HAS_COMPLETED (read_pc(), read_sp (),
1894 FRAME_FP (get_current_frame ())))
1897 /* If interactive, print the frame that is now current. */
1900 frame_command ("0", 1);
1902 select_frame_command ("0", 0);
1905 /* Sets the scope to input function name, provided that the
1906 function is within the current stack frame */
1908 struct function_bounds
1910 CORE_ADDR low
, high
;
1913 static void func_command (char *arg
, int from_tty
);
1915 func_command (char *arg
, int from_tty
)
1917 struct frame_info
*fp
;
1919 struct symtabs_and_lines sals
;
1922 struct function_bounds
*func_bounds
= (struct function_bounds
*) NULL
;
1924 if (arg
!= (char *) NULL
)
1927 fp
= parse_frame_specification ("0");
1928 sals
= decode_line_spec (arg
, 1);
1929 func_bounds
= (struct function_bounds
*) xmalloc (
1930 sizeof (struct function_bounds
) * sals
.nelts
);
1931 for (i
= 0; (i
< sals
.nelts
&& !found
); i
++)
1933 if (sals
.sals
[i
].pc
== (CORE_ADDR
) 0 ||
1934 find_pc_partial_function (sals
.sals
[i
].pc
,
1936 &func_bounds
[i
].low
,
1937 &func_bounds
[i
].high
) == 0)
1939 func_bounds
[i
].low
=
1940 func_bounds
[i
].high
= (CORE_ADDR
) NULL
;
1946 for (i
= 0; (i
< sals
.nelts
&& !found
); i
++)
1947 found
= (fp
->pc
>= func_bounds
[i
].low
&&
1948 fp
->pc
< func_bounds
[i
].high
);
1952 fp
= find_relative_frame (fp
, &level
);
1955 while (!found
&& level
== 0);
1958 xfree (func_bounds
);
1961 printf_filtered ("'%s' not within current stack frame.\n", arg
);
1962 else if (fp
!= selected_frame
)
1963 select_and_print_frame (fp
, level
);
1966 /* Gets the language of the current frame. */
1969 get_frame_language (void)
1971 register struct symtab
*s
;
1972 enum language flang
; /* The language of the current frame */
1976 s
= find_pc_symtab (selected_frame
->pc
);
1978 flang
= s
->language
;
1980 flang
= language_unknown
;
1983 flang
= language_unknown
;
1989 _initialize_stack (void)
1992 backtrace_limit
= 30;
1995 add_com ("return", class_stack
, return_command
,
1996 "Make selected stack frame return to its caller.\n\
1997 Control remains in the debugger, but when you continue\n\
1998 execution will resume in the frame above the one now selected.\n\
1999 If an argument is given, it is an expression for the value to return.");
2001 add_com ("up", class_stack
, up_command
,
2002 "Select and print stack frame that called this one.\n\
2003 An argument says how many frames up to go.");
2004 add_com ("up-silently", class_support
, up_silently_command
,
2005 "Same as the `up' command, but does not print anything.\n\
2006 This is useful in command scripts.");
2008 add_com ("down", class_stack
, down_command
,
2009 "Select and print stack frame called by this one.\n\
2010 An argument says how many frames down to go.");
2011 add_com_alias ("do", "down", class_stack
, 1);
2012 add_com_alias ("dow", "down", class_stack
, 1);
2013 add_com ("down-silently", class_support
, down_silently_command
,
2014 "Same as the `down' command, but does not print anything.\n\
2015 This is useful in command scripts.");
2017 add_com ("frame", class_stack
, frame_command
,
2018 "Select and print a stack frame.\n\
2019 With no argument, print the selected stack frame. (See also \"info frame\").\n\
2020 An argument specifies the frame to select.\n\
2021 It can be a stack frame number or the address of the frame.\n\
2022 With argument, nothing is printed if input is coming from\n\
2023 a command file or a user-defined command.");
2025 add_com_alias ("f", "frame", class_stack
, 1);
2029 add_com ("L", class_stack
, current_frame_command
,
2030 "Print the current stack frame.\n");
2031 add_com_alias ("V", "frame", class_stack
, 1);
2033 add_com ("select-frame", class_stack
, select_frame_command
,
2034 "Select a stack frame without printing anything.\n\
2035 An argument specifies the frame to select.\n\
2036 It can be a stack frame number or the address of the frame.\n");
2038 add_com ("backtrace", class_stack
, backtrace_command
,
2039 "Print backtrace of all stack frames, or innermost COUNT frames.\n\
2040 With a negative argument, print outermost -COUNT frames.\n\
2041 Use of the 'full' qualifier also prints the values of the local variables.\n");
2042 add_com_alias ("bt", "backtrace", class_stack
, 0);
2045 add_com_alias ("t", "backtrace", class_stack
, 0);
2046 add_com ("T", class_stack
, backtrace_full_command
,
2047 "Print backtrace of all stack frames, or innermost COUNT frames \n\
2048 and the values of the local variables.\n\
2049 With a negative argument, print outermost -COUNT frames.\n\
2050 Usage: T <count>\n");
2053 add_com_alias ("where", "backtrace", class_alias
, 0);
2054 add_info ("stack", backtrace_command
,
2055 "Backtrace of the stack, or innermost COUNT frames.");
2056 add_info_alias ("s", "stack", 1);
2057 add_info ("frame", frame_info
,
2058 "All about selected stack frame, or frame at ADDR.");
2059 add_info_alias ("f", "frame", 1);
2060 add_info ("locals", locals_info
,
2061 "Local variables of current stack frame.");
2062 add_info ("args", args_info
,
2063 "Argument variables of current stack frame.");
2065 add_com ("l", class_info
, args_plus_locals_info
,
2066 "Argument and local variables of current stack frame.");
2069 add_com ("func", class_stack
, func_command
,
2070 "Select the stack frame that contains <func>.\nUsage: func <name>\n");
2072 add_info ("catch", catch_info
,
2073 "Exceptions that can be caught in the current stack frame.");
2076 add_cmd ("backtrace-limit", class_stack
, set_backtrace_limit_command
,
2077 "Specify maximum number of frames for \"backtrace\" to print by default.",
2079 add_info ("backtrace-limit", backtrace_limit_info
,
2080 "The maximum number of frames for \"backtrace\" to print by default.");