1 /* Print and select stack frames for GDB, the GNU debugger.
2 Copyright 1986, 87, 89, 91, 92, 93, 94, 95, 96, 98, 1999
3 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"
41 /* Prototypes for exported functions. */
43 void args_info
PARAMS ((char *, int));
45 void locals_info
PARAMS ((char *, int));
47 void (*selected_frame_level_changed_hook
) PARAMS ((int));
49 void _initialize_stack
PARAMS ((void));
51 /* Prototypes for local functions. */
53 static void return_command
PARAMS ((char *, int));
55 static void down_command
PARAMS ((char *, int));
57 static void down_silently_base
PARAMS ((char *));
59 static void down_silently_command
PARAMS ((char *, int));
61 static void up_command
PARAMS ((char *, int));
63 static void up_silently_base
PARAMS ((char *));
65 static void up_silently_command
PARAMS ((char *, int));
67 void frame_command
PARAMS ((char *, int));
69 static void current_frame_command
PARAMS ((char *, int));
71 static void select_frame_command
PARAMS ((char *, int));
73 static void print_frame_arg_vars
PARAMS ((struct frame_info
*, GDB_FILE
*));
75 static void catch_info
PARAMS ((char *, int));
77 static void args_plus_locals_info
PARAMS ((char *, int));
79 static void print_frame_label_vars
PARAMS ((struct frame_info
*,
83 static void print_frame_local_vars
PARAMS ((struct frame_info
*,
87 static int print_block_frame_labels
PARAMS ((struct block
*, int *,
90 static int print_block_frame_locals
PARAMS ((struct block
*,
95 static void print_frame_info_base
PARAMS ((struct frame_info
*, int, int, int));
97 static void print_stack_frame_base
PARAMS ((struct frame_info
*, int, int));
99 static void backtrace_command
PARAMS ((char *, int));
101 struct frame_info
*parse_frame_specification
PARAMS ((char *));
103 static void frame_info
PARAMS ((char *, int));
105 extern int addressprint
; /* Print addresses, or stay symbolic only? */
106 extern int info_verbose
; /* Verbosity of symbol reading msgs */
107 extern int lines_to_list
; /* # of lines "list" command shows by default */
109 /* The "selected" stack frame is used by default for local and arg access.
110 May be zero, for no selected frame. */
112 struct frame_info
*selected_frame
;
114 /* Level of the selected frame:
115 0 for innermost, 1 for its caller, ...
116 or -1 for frame specified by address with no defined level. */
118 int selected_frame_level
;
120 /* Zero means do things normally; we are interacting directly with the
121 user. One means print the full filename and linenumber when a
122 frame is printed, and do so in a format emacs18/emacs19.22 can
123 parse. Two means print similar annotations, but in many more
124 cases and in a slightly different syntax. */
126 int annotation_level
= 0;
129 struct print_stack_frame_args
131 struct frame_info
*fi
;
137 static int print_stack_frame_base_stub
PARAMS ((char *));
139 /* Show and print the frame arguments.
140 Pass the args the way catch_errors wants them. */
141 static int show_and_print_stack_frame_stub
PARAMS ((void *args
));
143 show_and_print_stack_frame_stub (args
)
146 struct print_stack_frame_args
*p
= (struct print_stack_frame_args
*) args
;
148 /* Reversed order of these so tuiDo() doesn't occur
149 * in the middle of "Breakpoint 1 ... [location]" printing = RT
152 print_frame_info_base (p
->fi
, p
->level
, p
->source
, p
->args
);
153 print_frame_info (p
->fi
, p
->level
, p
->source
, p
->args
);
158 /* Show or print the frame arguments.
159 Pass the args the way catch_errors wants them. */
160 static int print_stack_frame_stub
PARAMS ((void *args
));
162 print_stack_frame_stub (args
)
165 struct print_stack_frame_args
*p
= (struct print_stack_frame_args
*) args
;
168 print_frame_info (p
->fi
, p
->level
, p
->source
, p
->args
);
170 print_frame_info_base (p
->fi
, p
->level
, p
->source
, p
->args
);
174 /* Print a stack frame briefly. FRAME_INFI should be the frame info
175 and LEVEL should be its level in the stack (or -1 for level not
178 /* Pass the args the way catch_errors wants them. */
180 print_stack_frame_base_stub (args
)
183 struct print_stack_frame_args
*p
= (struct print_stack_frame_args
*) args
;
185 print_frame_info_base (p
->fi
, p
->level
, p
->source
, p
->args
);
189 /* print the frame arguments to the terminal.
190 Pass the args the way catch_errors wants them. */
191 static int print_only_stack_frame_stub
PARAMS ((void *));
193 print_only_stack_frame_stub (args
)
196 struct print_stack_frame_args
*p
= (struct print_stack_frame_args
*) args
;
198 print_frame_info_base (p
->fi
, p
->level
, p
->source
, p
->args
);
202 /* Print a stack frame briefly. FRAME_INFI should be the frame info
203 and LEVEL should be its level in the stack (or -1 for level not defined).
204 This prints the level, the function executing, the arguments,
205 and the file name and line number.
206 If the pc is not at the beginning of the source line,
207 the actual pc is printed at the beginning.
209 If SOURCE is 1, print the source line as well.
210 If SOURCE is -1, print ONLY the source line. */
213 print_stack_frame_base (fi
, level
, source
)
214 struct frame_info
*fi
;
218 struct print_stack_frame_args args
;
222 args
.source
= source
;
225 catch_errors (print_stack_frame_stub
, &args
, "", RETURN_MASK_ALL
);
228 /* Show and print a stack frame briefly. FRAME_INFI should be the frame info
229 and LEVEL should be its level in the stack (or -1 for level not defined).
230 This prints the level, the function executing, the arguments,
231 and the file name and line number.
232 If the pc is not at the beginning of the source line,
233 the actual pc is printed at the beginning.
235 If SOURCE is 1, print the source line as well.
236 If SOURCE is -1, print ONLY the source line. */
239 show_and_print_stack_frame (fi
, level
, source
)
240 struct frame_info
*fi
;
244 struct print_stack_frame_args args
;
248 args
.source
= source
;
251 catch_errors (show_and_print_stack_frame_stub
, &args
, "", RETURN_MASK_ALL
);
255 /* Show or print a stack frame briefly. FRAME_INFI should be the frame info
256 and LEVEL should be its level in the stack (or -1 for level not defined).
257 This prints the level, the function executing, the arguments,
258 and the file name and line number.
259 If the pc is not at the beginning of the source line,
260 the actual pc is printed at the beginning.
262 If SOURCE is 1, print the source line as well.
263 If SOURCE is -1, print ONLY the source line. */
266 print_stack_frame (fi
, level
, source
)
267 struct frame_info
*fi
;
271 struct print_stack_frame_args args
;
275 args
.source
= source
;
278 catch_errors (print_stack_frame_stub
, (char *) &args
, "", RETURN_MASK_ALL
);
281 /* Print a stack frame briefly. FRAME_INFI should be the frame info
282 and LEVEL should be its level in the stack (or -1 for level not defined).
283 This prints the level, the function executing, the arguments,
284 and the file name and line number.
285 If the pc is not at the beginning of the source line,
286 the actual pc is printed at the beginning.
288 If SOURCE is 1, print the source line as well.
289 If SOURCE is -1, print ONLY the source line. */
292 print_only_stack_frame (fi
, level
, source
)
293 struct frame_info
*fi
;
297 struct print_stack_frame_args args
;
301 args
.source
= source
;
304 catch_errors (print_only_stack_frame_stub
, &args
, "", RETURN_MASK_ALL
);
307 struct print_args_args
310 struct frame_info
*fi
;
314 static int print_args_stub
PARAMS ((PTR
));
316 /* Pass the args the way catch_errors wants them. */
319 print_args_stub (args
)
323 struct print_args_args
*p
= (struct print_args_args
*) args
;
325 numargs
= FRAME_NUM_ARGS (p
->fi
);
326 print_frame_args (p
->func
, p
->fi
, numargs
, p
->stream
);
330 /* Print information about a frame for frame "fi" at level "level".
331 * Used in "where" output, also used to emit breakpoint or step messages.
332 * LEVEL is the level of the frame, or -1 if it is the innermost frame
333 * but we don't want to print the level.
334 * The meaning of the SOURCE argument is:
335 * -1: Print only source line
336 * 0: Print only location
337 * 1: Print location and source line
341 print_frame_info_base (fi
, level
, source
, args
)
342 struct frame_info
*fi
;
347 struct symtab_and_line sal
;
349 register char *funname
= 0;
350 enum language funlang
= language_unknown
;
353 char buf
[MAX_REGISTER_RAW_SIZE
];
356 /* On the 68k, this spends too much time in m68k_find_saved_regs. */
358 /* Get the value of SP_REGNUM relative to the frame. */
359 get_saved_register (buf
, (int *) NULL
, (CORE_ADDR
*) NULL
,
360 FRAME_INFO_ID (fi
), SP_REGNUM
, (enum lval_type
*) NULL
);
361 sp
= extract_address (buf
, REGISTER_RAW_SIZE (SP_REGNUM
));
363 /* This is not a perfect test, because if a function alloca's some
364 memory, puts some code there, and then jumps into it, then the test
365 will succeed even though there is no call dummy. Probably best is
366 to check for a bp_call_dummy breakpoint. */
367 if (PC_IN_CALL_DUMMY (fi
->pc
, sp
, fi
->frame
))
369 if (frame_in_dummy (fi
))
372 annotate_frame_begin (level
== -1 ? 0 : level
, fi
->pc
);
374 /* Do this regardless of SOURCE because we don't have any source
375 to list for this frame. */
377 printf_filtered ("#%-2d ", level
);
378 annotate_function_call ();
379 printf_filtered ("<function called from gdb>\n");
380 annotate_frame_end ();
383 if (fi
->signal_handler_caller
)
385 annotate_frame_begin (level
== -1 ? 0 : level
, fi
->pc
);
387 /* Do this regardless of SOURCE because we don't have any source
388 to list for this frame. */
390 printf_filtered ("#%-2d ", level
);
391 annotate_signal_handler_caller ();
392 printf_filtered ("<signal handler called>\n");
393 annotate_frame_end ();
397 /* If fi is not the innermost frame, that normally means that fi->pc
398 points to *after* the call instruction, and we want to get the line
399 containing the call, never the next line. But if the next frame is
400 a signal_handler_caller or a dummy frame, then the next frame was
401 not entered as the result of a call, and we want to get the line
402 containing fi->pc. */
404 find_pc_line (fi
->pc
,
406 && !fi
->next
->signal_handler_caller
407 && !frame_in_dummy (fi
->next
));
409 func
= find_pc_function (fi
->pc
);
412 /* In certain pathological cases, the symtabs give the wrong
413 function (when we are in the first function in a file which
414 is compiled without debugging symbols, the previous function
415 is compiled with debugging symbols, and the "foo.o" symbol
416 that is supposed to tell us where the file with debugging symbols
417 ends has been truncated by ar because it is longer than 15
418 characters). This also occurs if the user uses asm() to create
419 a function but not stabs for it (in a file compiled -g).
421 So look in the minimal symbol tables as well, and if it comes
422 up with a larger address for the function use that instead.
423 I don't think this can ever cause any problems; there shouldn't
424 be any minimal symbols in the middle of a function; if this is
425 ever changed many parts of GDB will need to be changed (and we'll
426 create a find_pc_minimal_function or some such). */
428 struct minimal_symbol
*msymbol
= lookup_minimal_symbol_by_pc (fi
->pc
);
430 && (SYMBOL_VALUE_ADDRESS (msymbol
)
431 > BLOCK_START (SYMBOL_BLOCK_VALUE (func
))))
434 /* There is no particular reason to think the line number
435 information is wrong. Someone might have just put in
436 a label with asm() but left the line numbers alone. */
437 /* In this case we have no way of knowing the source file
438 and line number, so don't print them. */
441 /* We also don't know anything about the function besides
442 its address and name. */
444 funname
= SYMBOL_NAME (msymbol
);
445 funlang
= SYMBOL_LANGUAGE (msymbol
);
449 /* I'd like to use SYMBOL_SOURCE_NAME() here, to display
450 * the demangled name that we already have stored in
451 * the symbol table, but we stored a version with
452 * DMGL_PARAMS turned on, and here we don't want
453 * to display parameters. So call the demangler again,
454 * with DMGL_ANSI only. RT
455 * (Yes, I know that printf_symbol_filtered() will
456 * again try to demangle the name on the fly, but
457 * the issue is that if cplus_demangle() fails here,
458 * it'll fail there too. So we want to catch the failure
459 * ("demangled==NULL" case below) here, while we still
460 * have our hands on the function symbol.)
463 funname
= SYMBOL_NAME (func
);
464 funlang
= SYMBOL_LANGUAGE (func
);
465 if (funlang
== language_cplus
)
467 demangled
= cplus_demangle (funname
, DMGL_ANSI
);
468 if (demangled
== NULL
)
469 /* If the demangler fails, try the demangled name
470 * from the symbol table. This'll have parameters,
471 * but that's preferable to diplaying a mangled name.
473 funname
= SYMBOL_SOURCE_NAME (func
);
479 struct minimal_symbol
*msymbol
= lookup_minimal_symbol_by_pc (fi
->pc
);
482 funname
= SYMBOL_NAME (msymbol
);
483 funlang
= SYMBOL_LANGUAGE (msymbol
);
487 if (source
>= 0 || !sal
.symtab
)
489 annotate_frame_begin (level
== -1 ? 0 : level
, fi
->pc
);
492 printf_filtered ("#%-2d ", level
);
494 if (fi
->pc
!= sal
.pc
|| !sal
.symtab
)
496 annotate_frame_address ();
497 print_address_numeric (fi
->pc
, 1, gdb_stdout
);
498 annotate_frame_address_end ();
499 printf_filtered (" in ");
501 annotate_frame_function_name ();
502 fprintf_symbol_filtered (gdb_stdout
, funname
? funname
: "??", funlang
,
505 annotate_frame_args ();
506 fputs_filtered (" (", gdb_stdout
);
509 struct print_args_args args
;
512 args
.stream
= gdb_stdout
;
513 catch_errors (print_args_stub
, &args
, "", RETURN_MASK_ALL
);
516 printf_filtered (")");
517 if (sal
.symtab
&& sal
.symtab
->filename
)
519 annotate_frame_source_begin ();
521 printf_filtered (" at ");
522 annotate_frame_source_file ();
523 printf_filtered ("%s", sal
.symtab
->filename
);
524 annotate_frame_source_file_end ();
525 printf_filtered (":");
526 annotate_frame_source_line ();
527 printf_filtered ("%d", sal
.line
);
528 annotate_frame_source_end ();
531 #ifdef PC_LOAD_SEGMENT
532 /* If we couldn't print out function name but if can figure out what
533 load segment this pc value is from, at least print out some info
534 about its load segment. */
537 annotate_frame_where ();
539 printf_filtered (" from %s", PC_LOAD_SEGMENT (fi
->pc
));
543 if (!funname
|| (!sal
.symtab
|| !sal
.symtab
->filename
))
545 char *lib
= PC_SOLIB (fi
->pc
);
548 annotate_frame_where ();
550 printf_filtered (" from %s", lib
);
554 printf_filtered ("\n");
557 if ((source
!= 0) && sal
.symtab
)
560 int mid_statement
= source
< 0 && fi
->pc
!= sal
.pc
;
561 if (annotation_level
)
562 done
= identify_source_line (sal
.symtab
, sal
.line
, mid_statement
,
566 if (addressprint
&& mid_statement
&& !tui_version
)
568 print_address_numeric (fi
->pc
, 1, gdb_stdout
);
569 printf_filtered ("\t");
571 if (print_frame_info_listing_hook
)
572 print_frame_info_listing_hook (sal
.symtab
, sal
.line
, sal
.line
+ 1, 0);
573 else if (!tui_version
)
574 print_source_lines (sal
.symtab
, sal
.line
, sal
.line
+ 1, 0);
576 current_source_line
= max (sal
.line
- lines_to_list
/ 2, 1);
580 set_default_breakpoint (1, fi
->pc
, sal
.symtab
, sal
.line
);
582 annotate_frame_end ();
584 gdb_flush (gdb_stdout
);
590 stack_publish_stopped_with_no_frame ()
592 TUIDO (((TuiOpaqueFuncPtr
) tuiUpdateOnEnd
));
598 /* Show or print the frame info. If this is the tui, it will be shown in
599 the source display */
601 print_frame_info (fi
, level
, source
, args
)
602 struct frame_info
*fi
;
608 print_frame_info_base (fi
, level
, source
, args
);
611 if (fi
&& (frame_in_dummy (fi
) || fi
->signal_handler_caller
))
612 print_frame_info_base (fi
, level
, source
, args
);
615 TUIDO (((TuiOpaqueFuncPtr
) tui_vShowFrameInfo
, fi
));
620 /* Show the frame info. If this is the tui, it will be shown in
621 the source display otherwise, nothing is done */
623 show_stack_frame (fi
)
624 struct frame_info
*fi
;
626 TUIDO (((TuiOpaqueFuncPtr
) tui_vShowFrameInfo
, fi
));
630 /* Read a frame specification in whatever the appropriate format is.
631 Call error() if the specification is in any way invalid (i.e.
632 this function never returns NULL). */
635 parse_frame_specification (frame_exp
)
640 CORE_ADDR args
[MAXARGS
];
644 char *addr_string
, *p
;
645 struct cleanup
*tmp_cleanup
;
647 while (*frame_exp
== ' ')
652 if (numargs
> MAXARGS
)
653 error ("Too many args in frame specification");
654 /* Parse an argument. */
655 for (p
= frame_exp
; *p
&& *p
!= ' '; p
++)
657 addr_string
= savestring (frame_exp
, p
- frame_exp
);
660 tmp_cleanup
= make_cleanup (free
, addr_string
);
661 args
[numargs
++] = parse_and_eval_address (addr_string
);
662 do_cleanups (tmp_cleanup
);
665 /* Skip spaces, move to possible next arg. */
675 if (selected_frame
== NULL
)
676 error ("No selected frame.");
677 return selected_frame
;
682 struct frame_info
*fid
=
683 find_relative_frame (get_current_frame (), &level
);
684 struct frame_info
*tfid
;
687 /* find_relative_frame was successful */
690 /* If SETUP_ARBITRARY_FRAME is defined, then frame specifications
691 take at least 2 addresses. It is important to detect this case
692 here so that "frame 100" does not give a confusing error message
693 like "frame specification requires two addresses". This of course
694 does not solve the "frame 100" problem for machines on which
695 a frame specification can be made with one address. To solve
696 that, we need a new syntax for a specifying a frame by address.
697 I think the cleanest syntax is $frame(0x45) ($frame(0x23,0x45) for
698 two args, etc.), but people might think that is too much typing,
699 so I guess *0x23,0x45 would be a possible alternative (commas
700 really should be used instead of spaces to delimit; using spaces
701 normally works in an expression). */
702 #ifdef SETUP_ARBITRARY_FRAME
703 error ("No frame %d", args
[0]);
706 /* If (s)he specifies the frame with an address, he deserves what
707 (s)he gets. Still, give the highest one that matches. */
709 for (fid
= get_current_frame ();
710 fid
&& fid
->frame
!= args
[0];
711 fid
= get_prev_frame (fid
))
715 while ((tfid
= get_prev_frame (fid
)) &&
716 (tfid
->frame
== args
[0]))
719 /* We couldn't identify the frame as an existing frame, but
720 perhaps we can create one with a single argument. */
724 #ifdef SETUP_ARBITRARY_FRAME
725 return SETUP_ARBITRARY_FRAME (numargs
, args
);
727 /* Usual case. Do it here rather than have everyone supply
728 a SETUP_ARBITRARY_FRAME that does this. */
730 return create_new_frame (args
[0], 0);
731 error ("Too many args in frame specification");
738 /* FRAME_ARGS_ADDRESS_CORRECT is just like FRAME_ARGS_ADDRESS except
739 that if it is unsure about the answer, it returns 0
740 instead of guessing (this happens on the VAX and i960, for example).
742 On most machines, we never have to guess about the args address,
743 so FRAME_ARGS_ADDRESS{,_CORRECT} are the same. */
744 #if !defined (FRAME_ARGS_ADDRESS_CORRECT)
745 #define FRAME_ARGS_ADDRESS_CORRECT FRAME_ARGS_ADDRESS
748 /* Print verbosely the selected frame or the frame at address ADDR.
749 This means absolutely all information in the frame is printed. */
752 frame_info (addr_exp
, from_tty
)
756 struct frame_info
*fi
;
757 struct symtab_and_line sal
;
760 struct frame_info
*calling_frame_info
;
761 int i
, count
, numregs
;
763 enum language funlang
= language_unknown
;
765 if (!target_has_stack
)
768 fi
= parse_frame_specification (addr_exp
);
770 error ("Invalid frame specified.");
772 sal
= find_pc_line (fi
->pc
,
774 && !fi
->next
->signal_handler_caller
775 && !frame_in_dummy (fi
->next
));
776 func
= get_frame_function (fi
);
777 s
= find_pc_symtab (fi
->pc
);
780 /* I'd like to use SYMBOL_SOURCE_NAME() here, to display
781 * the demangled name that we already have stored in
782 * the symbol table, but we stored a version with
783 * DMGL_PARAMS turned on, and here we don't want
784 * to display parameters. So call the demangler again,
785 * with DMGL_ANSI only. RT
786 * (Yes, I know that printf_symbol_filtered() will
787 * again try to demangle the name on the fly, but
788 * the issue is that if cplus_demangle() fails here,
789 * it'll fail there too. So we want to catch the failure
790 * ("demangled==NULL" case below) here, while we still
791 * have our hands on the function symbol.)
794 funname
= SYMBOL_NAME (func
);
795 funlang
= SYMBOL_LANGUAGE (func
);
796 if (funlang
== language_cplus
)
798 demangled
= cplus_demangle (funname
, DMGL_ANSI
);
799 /* If the demangler fails, try the demangled name
800 * from the symbol table. This'll have parameters,
801 * but that's preferable to diplaying a mangled name.
803 if (demangled
== NULL
)
804 funname
= SYMBOL_SOURCE_NAME (func
);
809 register struct minimal_symbol
*msymbol
= lookup_minimal_symbol_by_pc (fi
->pc
);
812 funname
= SYMBOL_NAME (msymbol
);
813 funlang
= SYMBOL_LANGUAGE (msymbol
);
816 calling_frame_info
= get_prev_frame (fi
);
818 if (!addr_exp
&& selected_frame_level
>= 0)
820 printf_filtered ("Stack level %d, frame at ", selected_frame_level
);
821 print_address_numeric (fi
->frame
, 1, gdb_stdout
);
822 printf_filtered (":\n");
826 printf_filtered ("Stack frame at ");
827 print_address_numeric (fi
->frame
, 1, gdb_stdout
);
828 printf_filtered (":\n");
830 printf_filtered (" %s = ", REGISTER_NAME (PC_REGNUM
));
831 print_address_numeric (fi
->pc
, 1, gdb_stdout
);
836 printf_filtered (" in ");
837 fprintf_symbol_filtered (gdb_stdout
, funname
, funlang
,
838 DMGL_ANSI
| DMGL_PARAMS
);
842 printf_filtered (" (%s:%d)", sal
.symtab
->filename
, sal
.line
);
843 puts_filtered ("; ");
845 printf_filtered ("saved %s ", REGISTER_NAME (PC_REGNUM
));
846 print_address_numeric (FRAME_SAVED_PC (fi
), 1, gdb_stdout
);
847 printf_filtered ("\n");
851 frameless
= FRAMELESS_FUNCTION_INVOCATION (fi
);
853 printf_filtered (" (FRAMELESS),");
856 if (calling_frame_info
)
858 printf_filtered (" called by frame at ");
859 print_address_numeric (calling_frame_info
->frame
, 1, gdb_stdout
);
861 if (fi
->next
&& calling_frame_info
)
866 printf_filtered (" caller of frame at ");
867 print_address_numeric (fi
->next
->frame
, 1, gdb_stdout
);
869 if (fi
->next
|| calling_frame_info
)
870 puts_filtered ("\n");
872 printf_filtered (" source language %s.\n", language_str (s
->language
));
874 #ifdef PRINT_EXTRA_FRAME_INFO
875 PRINT_EXTRA_FRAME_INFO (fi
);
879 /* Address of the argument list for this frame, or 0. */
880 CORE_ADDR arg_list
= FRAME_ARGS_ADDRESS_CORRECT (fi
);
881 /* Number of args for this frame, or -1 if unknown. */
885 printf_filtered (" Arglist at unknown address.\n");
888 printf_filtered (" Arglist at ");
889 print_address_numeric (arg_list
, 1, gdb_stdout
);
890 printf_filtered (",");
892 numargs
= FRAME_NUM_ARGS (fi
);
894 puts_filtered (" args: ");
895 else if (numargs
== 0)
896 puts_filtered (" no args.");
897 else if (numargs
== 1)
898 puts_filtered (" 1 arg: ");
900 printf_filtered (" %d args: ", numargs
);
901 print_frame_args (func
, fi
, numargs
, gdb_stdout
);
902 puts_filtered ("\n");
906 /* Address of the local variables for this frame, or 0. */
907 CORE_ADDR arg_list
= FRAME_LOCALS_ADDRESS (fi
);
910 printf_filtered (" Locals at unknown address,");
913 printf_filtered (" Locals at ");
914 print_address_numeric (arg_list
, 1, gdb_stdout
);
915 printf_filtered (",");
919 FRAME_INIT_SAVED_REGS (fi
);
920 if (fi
->saved_regs
!= NULL
)
922 /* The sp is special; what's returned isn't the save address, but
923 actually the value of the previous frame's sp. */
924 printf_filtered (" Previous frame's sp is ");
925 print_address_numeric (fi
->saved_regs
[SP_REGNUM
], 1, gdb_stdout
);
926 printf_filtered ("\n");
928 numregs
= ARCH_NUM_REGS
;
929 for (i
= 0; i
< numregs
; i
++)
930 if (fi
->saved_regs
[i
] && i
!= SP_REGNUM
)
933 puts_filtered (" Saved registers:\n ");
937 printf_filtered (" %s at ", REGISTER_NAME (i
));
938 print_address_numeric (fi
->saved_regs
[i
], 1, gdb_stdout
);
942 puts_filtered ("\n");
946 /* We could get some information about saved registers by
947 calling get_saved_register on each register. Which info goes
948 with which frame is necessarily lost, however, and I suspect
949 that the users don't care whether they get the info. */
950 puts_filtered ("\n");
955 /* Set a limit on the number of frames printed by default in a
958 static int backtrace_limit
;
961 set_backtrace_limit_command (count_exp
, from_tty
)
965 int count
= parse_and_eval_address (count_exp
);
968 error ("Negative argument not meaningful as backtrace limit.");
970 backtrace_limit
= count
;
974 backtrace_limit_info (arg
, from_tty
)
979 error ("\"Info backtrace-limit\" takes no arguments.");
981 printf_unfiltered ("Backtrace limit: %d.\n", backtrace_limit
);
985 /* Print briefly all stack frames or just the innermost COUNT frames. */
987 static void backtrace_command_1
PARAMS ((char *count_exp
, int show_locals
, int from_tty
));
989 backtrace_command_1 (count_exp
, show_locals
, from_tty
)
994 struct frame_info
*fi
;
997 register struct frame_info
*trailing
;
998 register int trailing_level
;
1000 if (!target_has_stack
)
1001 error ("No stack.");
1003 /* The following code must do two things. First, it must
1004 set the variable TRAILING to the frame from which we should start
1005 printing. Second, it must set the variable count to the number
1006 of frames which we should print, or -1 if all of them. */
1007 trailing
= get_current_frame ();
1011 count
= parse_and_eval_address (count_exp
);
1014 struct frame_info
*current
;
1019 while (current
&& count
--)
1022 current
= get_prev_frame (current
);
1025 /* Will stop when CURRENT reaches the top of the stack. TRAILING
1026 will be COUNT below it. */
1030 trailing
= get_prev_frame (trailing
);
1031 current
= get_prev_frame (current
);
1043 struct partial_symtab
*ps
;
1045 /* Read in symbols for all of the frames. Need to do this in
1046 a separate pass so that "Reading in symbols for xxx" messages
1047 don't screw up the appearance of the backtrace. Also
1048 if people have strong opinions against reading symbols for
1049 backtrace this may have to be an option. */
1053 fi
= get_prev_frame (fi
))
1056 ps
= find_pc_psymtab (fi
->pc
);
1058 PSYMTAB_TO_SYMTAB (ps
); /* Force syms to come in */
1062 for (i
= 0, fi
= trailing
;
1064 i
++, fi
= get_prev_frame (fi
))
1068 /* Don't use print_stack_frame; if an error() occurs it probably
1069 means further attempts to backtrace would fail (on the other
1070 hand, perhaps the code does or could be fixed to make sure
1071 the frame->prev field gets set to NULL in that case). */
1072 print_frame_info_base (fi
, trailing_level
+ i
, 0, 1);
1074 print_frame_local_vars (fi
, 1, gdb_stdout
);
1077 /* If we've stopped before the end, mention that. */
1079 printf_filtered ("(More stack frames follow...)\n");
1083 backtrace_command (arg
, from_tty
)
1087 struct cleanup
*old_chain
= (struct cleanup
*) NULL
;
1088 char **argv
= (char **) NULL
;
1089 int argIndicatingFullTrace
= (-1), totArgLen
= 0, argc
= 0;
1092 if (arg
!= (char *) NULL
)
1096 argv
= buildargv (arg
);
1097 old_chain
= make_cleanup_freeargv (argv
);
1099 for (i
= 0; (argv
[i
] != (char *) NULL
); i
++)
1103 for (j
= 0; (j
< strlen (argv
[i
])); j
++)
1104 argv
[i
][j
] = tolower (argv
[i
][j
]);
1106 if (argIndicatingFullTrace
< 0 && subset_compare (argv
[i
], "full"))
1107 argIndicatingFullTrace
= argc
;
1111 totArgLen
+= strlen (argv
[i
]);
1115 if (argIndicatingFullTrace
>= 0)
1119 argPtr
= (char *) xmalloc (totArgLen
+ 1);
1124 memset (argPtr
, 0, totArgLen
+ 1);
1125 for (i
= 0; (i
< (argc
+ 1)); i
++)
1127 if (i
!= argIndicatingFullTrace
)
1129 strcat (argPtr
, argv
[i
]);
1130 strcat (argPtr
, " ");
1136 argPtr
= (char *) NULL
;
1140 backtrace_command_1 (argPtr
, (argIndicatingFullTrace
>= 0), from_tty
);
1142 if (argIndicatingFullTrace
>= 0 && totArgLen
> 0)
1146 do_cleanups (old_chain
);
1149 static void backtrace_full_command
PARAMS ((char *arg
, int from_tty
));
1151 backtrace_full_command (arg
, from_tty
)
1155 backtrace_command_1 (arg
, 1, from_tty
);
1159 /* Print the local variables of a block B active in FRAME.
1160 Return 1 if any variables were printed; 0 otherwise. */
1163 print_block_frame_locals (b
, fi
, num_tabs
, stream
)
1165 register struct frame_info
*fi
;
1167 register GDB_FILE
*stream
;
1171 register struct symbol
*sym
;
1172 register int values_printed
= 0;
1174 nsyms
= BLOCK_NSYMS (b
);
1176 for (i
= 0; i
< nsyms
; i
++)
1178 sym
= BLOCK_SYM (b
, i
);
1179 switch (SYMBOL_CLASS (sym
))
1186 for (j
= 0; j
< num_tabs
; j
++)
1187 fputs_filtered ("\t", stream
);
1188 fputs_filtered (SYMBOL_SOURCE_NAME (sym
), stream
);
1189 fputs_filtered (" = ", stream
);
1190 print_variable_value (sym
, fi
, stream
);
1191 fprintf_filtered (stream
, "\n");
1195 /* Ignore symbols which are not locals. */
1199 return values_printed
;
1202 /* Same, but print labels. */
1205 print_block_frame_labels (b
, have_default
, stream
)
1208 register GDB_FILE
*stream
;
1212 register struct symbol
*sym
;
1213 register int values_printed
= 0;
1215 nsyms
= BLOCK_NSYMS (b
);
1217 for (i
= 0; i
< nsyms
; i
++)
1219 sym
= BLOCK_SYM (b
, i
);
1220 if (STREQ (SYMBOL_NAME (sym
), "default"))
1226 if (SYMBOL_CLASS (sym
) == LOC_LABEL
)
1228 struct symtab_and_line sal
;
1229 sal
= find_pc_line (SYMBOL_VALUE_ADDRESS (sym
), 0);
1231 fputs_filtered (SYMBOL_SOURCE_NAME (sym
), stream
);
1234 fprintf_filtered (stream
, " ");
1235 print_address_numeric (SYMBOL_VALUE_ADDRESS (sym
), 1, stream
);
1237 fprintf_filtered (stream
, " in file %s, line %d\n",
1238 sal
.symtab
->filename
, sal
.line
);
1241 return values_printed
;
1244 /* Print on STREAM all the local variables in frame FRAME,
1245 including all the blocks active in that frame
1248 Returns 1 if the job was done,
1249 or 0 if nothing was printed because we have no info
1250 on the function running in FRAME. */
1253 print_frame_local_vars (fi
, num_tabs
, stream
)
1254 register struct frame_info
*fi
;
1255 register int num_tabs
;
1256 register GDB_FILE
*stream
;
1258 register struct block
*block
= get_frame_block (fi
);
1259 register int values_printed
= 0;
1263 fprintf_filtered (stream
, "No symbol table info available.\n");
1269 if (print_block_frame_locals (block
, fi
, num_tabs
, stream
))
1271 /* After handling the function's top-level block, stop.
1272 Don't continue to its superblock, the block of
1273 per-file symbols. */
1274 if (BLOCK_FUNCTION (block
))
1276 block
= BLOCK_SUPERBLOCK (block
);
1279 if (!values_printed
)
1281 fprintf_filtered (stream
, "No locals.\n");
1285 /* Same, but print labels. */
1288 print_frame_label_vars (fi
, this_level_only
, stream
)
1289 register struct frame_info
*fi
;
1290 int this_level_only
;
1291 register GDB_FILE
*stream
;
1293 register struct blockvector
*bl
;
1294 register struct block
*block
= get_frame_block (fi
);
1295 register int values_printed
= 0;
1296 int index
, have_default
= 0;
1297 char *blocks_printed
;
1298 CORE_ADDR pc
= fi
->pc
;
1302 fprintf_filtered (stream
, "No symbol table info available.\n");
1306 bl
= blockvector_for_pc (BLOCK_END (block
) - 4, &index
);
1307 blocks_printed
= (char *) alloca (BLOCKVECTOR_NBLOCKS (bl
) * sizeof (char));
1308 memset (blocks_printed
, 0, BLOCKVECTOR_NBLOCKS (bl
) * sizeof (char));
1312 CORE_ADDR end
= BLOCK_END (block
) - 4;
1315 if (bl
!= blockvector_for_pc (end
, &index
))
1316 error ("blockvector blotch");
1317 if (BLOCKVECTOR_BLOCK (bl
, index
) != block
)
1318 error ("blockvector botch");
1319 last_index
= BLOCKVECTOR_NBLOCKS (bl
);
1322 /* Don't print out blocks that have gone by. */
1323 while (index
< last_index
1324 && BLOCK_END (BLOCKVECTOR_BLOCK (bl
, index
)) < pc
)
1327 while (index
< last_index
1328 && BLOCK_END (BLOCKVECTOR_BLOCK (bl
, index
)) < end
)
1330 if (blocks_printed
[index
] == 0)
1332 if (print_block_frame_labels (BLOCKVECTOR_BLOCK (bl
, index
), &have_default
, stream
))
1334 blocks_printed
[index
] = 1;
1340 if (values_printed
&& this_level_only
)
1343 /* After handling the function's top-level block, stop.
1344 Don't continue to its superblock, the block of
1345 per-file symbols. */
1346 if (BLOCK_FUNCTION (block
))
1348 block
= BLOCK_SUPERBLOCK (block
);
1351 if (!values_printed
&& !this_level_only
)
1353 fprintf_filtered (stream
, "No catches.\n");
1359 locals_info (args
, from_tty
)
1363 if (!selected_frame
)
1364 error ("No frame selected.");
1365 print_frame_local_vars (selected_frame
, 0, gdb_stdout
);
1369 catch_info (ignore
, from_tty
)
1373 struct symtab_and_line
*sal
;
1375 /* Check for target support for exception handling */
1376 sal
= target_enable_exception_callback (EX_EVENT_CATCH
, 1);
1379 /* Currently not handling this */
1380 /* Ideally, here we should interact with the C++ runtime
1381 system to find the list of active handlers, etc. */
1382 fprintf_filtered (gdb_stdout
, "Info catch not supported with this target/compiler combination.\n");
1384 if (!selected_frame
)
1385 error ("No frame selected.");
1390 /* Assume g++ compiled code -- old v 4.16 behaviour */
1391 if (!selected_frame
)
1392 error ("No frame selected.");
1394 print_frame_label_vars (selected_frame
, 0, gdb_stdout
);
1399 print_frame_arg_vars (fi
, stream
)
1400 register struct frame_info
*fi
;
1401 register GDB_FILE
*stream
;
1403 struct symbol
*func
= get_frame_function (fi
);
1404 register struct block
*b
;
1407 register struct symbol
*sym
, *sym2
;
1408 register int values_printed
= 0;
1412 fprintf_filtered (stream
, "No symbol table info available.\n");
1416 b
= SYMBOL_BLOCK_VALUE (func
);
1417 nsyms
= BLOCK_NSYMS (b
);
1419 for (i
= 0; i
< nsyms
; i
++)
1421 sym
= BLOCK_SYM (b
, i
);
1422 switch (SYMBOL_CLASS (sym
))
1428 case LOC_REGPARM_ADDR
:
1429 case LOC_BASEREG_ARG
:
1431 fputs_filtered (SYMBOL_SOURCE_NAME (sym
), stream
);
1432 fputs_filtered (" = ", stream
);
1434 /* We have to look up the symbol because arguments can have
1435 two entries (one a parameter, one a local) and the one we
1436 want is the local, which lookup_symbol will find for us.
1437 This includes gcc1 (not gcc2) on the sparc when passing a
1438 small structure and gcc2 when the argument type is float
1439 and it is passed as a double and converted to float by
1440 the prologue (in the latter case the type of the LOC_ARG
1441 symbol is double and the type of the LOC_LOCAL symbol is
1442 float). There are also LOC_ARG/LOC_REGISTER pairs which
1443 are not combined in symbol-reading. */
1445 sym2
= lookup_symbol (SYMBOL_NAME (sym
),
1446 b
, VAR_NAMESPACE
, (int *) NULL
, (struct symtab
**) NULL
);
1447 print_variable_value (sym2
, fi
, stream
);
1448 fprintf_filtered (stream
, "\n");
1452 /* Don't worry about things which aren't arguments. */
1457 if (!values_printed
)
1459 fprintf_filtered (stream
, "No arguments.\n");
1464 args_info (ignore
, from_tty
)
1468 if (!selected_frame
)
1469 error ("No frame selected.");
1470 print_frame_arg_vars (selected_frame
, gdb_stdout
);
1475 args_plus_locals_info (ignore
, from_tty
)
1479 args_info (ignore
, from_tty
);
1480 locals_info (ignore
, from_tty
);
1484 /* Select frame FI, and note that its stack level is LEVEL.
1485 LEVEL may be -1 if an actual level number is not known. */
1488 select_frame (fi
, level
)
1489 struct frame_info
*fi
;
1492 register struct symtab
*s
;
1494 selected_frame
= fi
;
1495 selected_frame_level
= level
;
1496 if (selected_frame_level_changed_hook
)
1497 selected_frame_level_changed_hook (level
);
1499 /* Ensure that symbols for this frame are read in. Also, determine the
1500 source language of this frame, and switch to it if desired. */
1503 s
= find_pc_symtab (fi
->pc
);
1505 && s
->language
!= current_language
->la_language
1506 && s
->language
!= language_unknown
1507 && language_mode
== language_mode_auto
)
1509 set_language (s
->language
);
1511 /* elz: this if here fixes the problem with the pc not being displayed
1512 in the tui asm layout, with no debug symbols. The value of s
1513 would be 0 here, and select_source_symtab would abort the
1514 command by calling the 'error' function */
1517 TUIDO (((TuiOpaqueFuncPtr
) tui_vSelectSourceSymtab
, s
));
1523 /* Select frame FI, noting that its stack level is LEVEL. Also print
1524 the stack frame and show the source if this is the tui version. */
1526 select_and_print_frame (fi
, level
)
1527 struct frame_info
*fi
;
1530 select_frame (fi
, level
);
1533 print_stack_frame (fi
, level
, 1);
1534 TUIDO (((TuiOpaqueFuncPtr
) tui_vCheckDataValues
, fi
));
1539 /* Select frame FI, noting that its stack level is LEVEL. Be silent if
1543 select_and_maybe_print_frame (fi
, level
)
1544 struct frame_info
*fi
;
1548 select_frame (fi
, level
);
1550 select_and_print_frame (fi
, level
);
1555 /* Store the selected frame and its level into *FRAMEP and *LEVELP.
1556 If there is no selected frame, *FRAMEP is set to NULL. */
1559 record_selected_frame (frameaddrp
, levelp
)
1560 CORE_ADDR
*frameaddrp
;
1563 *frameaddrp
= selected_frame
? selected_frame
->frame
: 0;
1564 *levelp
= selected_frame_level
;
1567 /* Return the symbol-block in which the selected frame is executing.
1568 Can return zero under various legitimate circumstances. */
1571 get_selected_block ()
1573 if (!target_has_stack
)
1576 if (!selected_frame
)
1577 return get_current_block ();
1578 return get_frame_block (selected_frame
);
1581 /* Find a frame a certain number of levels away from FRAME.
1582 LEVEL_OFFSET_PTR points to an int containing the number of levels.
1583 Positive means go to earlier frames (up); negative, the reverse.
1584 The int that contains the number of levels is counted toward
1585 zero as the frames for those levels are found.
1586 If the top or bottom frame is reached, that frame is returned,
1587 but the final value of *LEVEL_OFFSET_PTR is nonzero and indicates
1588 how much farther the original request asked to go. */
1591 find_relative_frame (frame
, level_offset_ptr
)
1592 register struct frame_info
*frame
;
1593 register int *level_offset_ptr
;
1595 register struct frame_info
*prev
;
1596 register struct frame_info
*frame1
;
1598 /* Going up is simple: just do get_prev_frame enough times
1599 or until initial frame is reached. */
1600 while (*level_offset_ptr
> 0)
1602 prev
= get_prev_frame (frame
);
1605 (*level_offset_ptr
)--;
1608 /* Going down is just as simple. */
1609 if (*level_offset_ptr
< 0)
1611 while (*level_offset_ptr
< 0)
1613 frame1
= get_next_frame (frame
);
1617 (*level_offset_ptr
)++;
1623 /* The "select_frame" command. With no arg, NOP.
1624 With arg LEVEL_EXP, select the frame at level LEVEL if it is a
1625 valid level. Otherwise, treat level_exp as an address expression
1626 and select it. See parse_frame_specification for more info on proper
1627 frame expressions. */
1631 select_frame_command (level_exp
, from_tty
)
1635 register struct frame_info
*frame
, *frame1
;
1636 unsigned int level
= 0;
1638 if (!target_has_stack
)
1639 error ("No stack.");
1641 frame
= parse_frame_specification (level_exp
);
1643 /* Try to figure out what level this frame is. But if there is
1644 no current stack, don't error out -- let the user set one. */
1646 if (get_current_frame ())
1648 for (frame1
= get_prev_frame (0);
1649 frame1
&& frame1
!= frame
;
1650 frame1
= get_prev_frame (frame1
))
1657 select_frame (frame
, level
);
1660 /* The "frame" command. With no arg, print selected frame briefly.
1661 With arg, behaves like select_frame and then prints the selected
1665 frame_command (level_exp
, from_tty
)
1669 select_frame_command (level_exp
, from_tty
);
1670 show_and_print_stack_frame (selected_frame
, selected_frame_level
, 1);
1673 /* The XDB Compatibility command to print the current frame. */
1676 current_frame_command (level_exp
, from_tty
)
1680 if (target_has_stack
== 0 || selected_frame
== 0)
1681 error ("No stack.");
1682 print_only_stack_frame (selected_frame
, selected_frame_level
, 1);
1685 /* Select the frame up one or COUNT stack levels
1686 from the previously selected frame, and print it briefly. */
1690 up_silently_base (count_exp
)
1693 register struct frame_info
*fi
;
1694 int count
= 1, count1
;
1696 count
= parse_and_eval_address (count_exp
);
1699 if (target_has_stack
== 0 || selected_frame
== 0)
1700 error ("No stack.");
1702 fi
= find_relative_frame (selected_frame
, &count1
);
1703 if (count1
!= 0 && count_exp
== 0)
1704 error ("Initial frame selected; you cannot go up.");
1705 select_frame (fi
, selected_frame_level
+ count
- count1
);
1709 up_silently_command (count_exp
, from_tty
)
1713 up_silently_base (count_exp
);
1715 print_stack_frame (selected_frame
, selected_frame_level
, 1);
1719 up_command (count_exp
, from_tty
)
1723 up_silently_base (count_exp
);
1724 show_and_print_stack_frame (selected_frame
, selected_frame_level
, 1);
1727 /* Select the frame down one or COUNT stack levels
1728 from the previously selected frame, and print it briefly. */
1732 down_silently_base (count_exp
)
1735 register struct frame_info
*frame
;
1736 int count
= -1, count1
;
1738 count
= -parse_and_eval_address (count_exp
);
1741 if (target_has_stack
== 0 || selected_frame
== 0)
1742 error ("No stack.");
1744 frame
= find_relative_frame (selected_frame
, &count1
);
1745 if (count1
!= 0 && count_exp
== 0)
1748 /* We only do this if count_exp is not specified. That way "down"
1749 means to really go down (and let me know if that is
1750 impossible), but "down 9999" can be used to mean go all the way
1751 down without getting an error. */
1753 error ("Bottom (i.e., innermost) frame selected; you cannot go down.");
1756 select_frame (frame
, selected_frame_level
+ count
- count1
);
1761 down_silently_command (count_exp
, from_tty
)
1765 down_silently_base (count_exp
);
1767 print_stack_frame (selected_frame
, selected_frame_level
, 1);
1771 down_command (count_exp
, from_tty
)
1775 down_silently_base (count_exp
);
1776 show_and_print_stack_frame (selected_frame
, selected_frame_level
, 1);
1780 return_command (retval_exp
, from_tty
)
1784 struct symbol
*thisfun
;
1785 CORE_ADDR selected_frame_addr
;
1786 CORE_ADDR selected_frame_pc
;
1787 struct frame_info
*frame
;
1788 value_ptr return_value
= NULL
;
1790 if (selected_frame
== NULL
)
1791 error ("No selected frame.");
1792 thisfun
= get_frame_function (selected_frame
);
1793 selected_frame_addr
= FRAME_FP (selected_frame
);
1794 selected_frame_pc
= selected_frame
->pc
;
1796 /* Compute the return value (if any -- possibly getting errors here). */
1800 struct type
*return_type
= NULL
;
1802 return_value
= parse_and_eval (retval_exp
);
1804 /* Cast return value to the return type of the function. */
1805 if (thisfun
!= NULL
)
1806 return_type
= TYPE_TARGET_TYPE (SYMBOL_TYPE (thisfun
));
1807 if (return_type
== NULL
)
1808 return_type
= builtin_type_int
;
1809 return_value
= value_cast (return_type
, return_value
);
1811 /* Make sure we have fully evaluated it, since
1812 it might live in the stack frame we're about to pop. */
1813 if (VALUE_LAZY (return_value
))
1814 value_fetch_lazy (return_value
);
1817 /* If interactive, require confirmation. */
1823 if (!query ("Make %s return now? ", SYMBOL_SOURCE_NAME (thisfun
)))
1825 error ("Not confirmed.");
1829 else if (!query ("Make selected stack frame return now? "))
1830 error ("Not confirmed.");
1833 /* Do the real work. Pop until the specified frame is current. We
1834 use this method because the selected_frame is not valid after
1835 a POP_FRAME. The pc comparison makes this work even if the
1836 selected frame shares its fp with another frame. */
1838 while (selected_frame_addr
!= (frame
= get_current_frame ())->frame
1839 || selected_frame_pc
!= frame
->pc
)
1842 /* Then pop that frame. */
1846 /* Compute the return value (if any) and store in the place
1847 for return values. */
1850 set_return_value (return_value
);
1852 /* If interactive, print the frame that is now current. */
1855 frame_command ("0", 1);
1857 select_frame_command ("0", 0);
1860 /* Sets the scope to input function name, provided that the
1861 function is within the current stack frame */
1863 struct function_bounds
1865 CORE_ADDR low
, high
;
1868 static void func_command
PARAMS ((char *arg
, int from_tty
));
1870 func_command (arg
, from_tty
)
1874 struct frame_info
*fp
;
1876 struct symtabs_and_lines sals
;
1879 struct function_bounds
*func_bounds
= (struct function_bounds
*) NULL
;
1881 if (arg
!= (char *) NULL
)
1884 fp
= parse_frame_specification ("0");
1885 sals
= decode_line_spec (arg
, 1);
1886 func_bounds
= (struct function_bounds
*) xmalloc (
1887 sizeof (struct function_bounds
) * sals
.nelts
);
1888 for (i
= 0; (i
< sals
.nelts
&& !found
); i
++)
1890 if (sals
.sals
[i
].pc
== (CORE_ADDR
) 0 ||
1891 find_pc_partial_function (sals
.sals
[i
].pc
,
1893 &func_bounds
[i
].low
,
1894 &func_bounds
[i
].high
) == 0)
1896 func_bounds
[i
].low
=
1897 func_bounds
[i
].high
= (CORE_ADDR
) NULL
;
1903 for (i
= 0; (i
< sals
.nelts
&& !found
); i
++)
1904 found
= (fp
->pc
>= func_bounds
[i
].low
&&
1905 fp
->pc
< func_bounds
[i
].high
);
1909 fp
= find_relative_frame (fp
, &level
);
1912 while (!found
&& level
== 0);
1918 printf_filtered ("'%s' not within current stack frame.\n", arg
);
1919 else if (fp
!= selected_frame
)
1920 select_and_print_frame (fp
, level
);
1923 /* Gets the language of the current frame. */
1926 get_frame_language ()
1928 register struct symtab
*s
;
1929 enum language flang
; /* The language of the current frame */
1933 s
= find_pc_symtab (selected_frame
->pc
);
1935 flang
= s
->language
;
1937 flang
= language_unknown
;
1940 flang
= language_unknown
;
1946 _initialize_stack ()
1949 backtrace_limit
= 30;
1952 add_com ("return", class_stack
, return_command
,
1953 "Make selected stack frame return to its caller.\n\
1954 Control remains in the debugger, but when you continue\n\
1955 execution will resume in the frame above the one now selected.\n\
1956 If an argument is given, it is an expression for the value to return.");
1958 add_com ("up", class_stack
, up_command
,
1959 "Select and print stack frame that called this one.\n\
1960 An argument says how many frames up to go.");
1961 add_com ("up-silently", class_support
, up_silently_command
,
1962 "Same as the `up' command, but does not print anything.\n\
1963 This is useful in command scripts.");
1965 add_com ("down", class_stack
, down_command
,
1966 "Select and print stack frame called by this one.\n\
1967 An argument says how many frames down to go.");
1968 add_com_alias ("do", "down", class_stack
, 1);
1969 add_com_alias ("dow", "down", class_stack
, 1);
1970 add_com ("down-silently", class_support
, down_silently_command
,
1971 "Same as the `down' command, but does not print anything.\n\
1972 This is useful in command scripts.");
1974 add_com ("frame", class_stack
, frame_command
,
1975 "Select and print a stack frame.\n\
1976 With no argument, print the selected stack frame. (See also \"info frame\").\n\
1977 An argument specifies the frame to select.\n\
1978 It can be a stack frame number or the address of the frame.\n\
1979 With argument, nothing is printed if input is coming from\n\
1980 a command file or a user-defined command.");
1982 add_com_alias ("f", "frame", class_stack
, 1);
1986 add_com ("L", class_stack
, current_frame_command
,
1987 "Print the current stack frame.\n");
1988 add_com_alias ("V", "frame", class_stack
, 1);
1990 add_com ("select-frame", class_stack
, select_frame_command
,
1991 "Select a stack frame without printing anything.\n\
1992 An argument specifies the frame to select.\n\
1993 It can be a stack frame number or the address of the frame.\n");
1995 add_com ("backtrace", class_stack
, backtrace_command
,
1996 "Print backtrace of all stack frames, or innermost COUNT frames.\n\
1997 With a negative argument, print outermost -COUNT frames.\n\
1998 Use of the 'full' qualifier also prints the values of the local variables.\n");
1999 add_com_alias ("bt", "backtrace", class_stack
, 0);
2002 add_com_alias ("t", "backtrace", class_stack
, 0);
2003 add_com ("T", class_stack
, backtrace_full_command
,
2004 "Print backtrace of all stack frames, or innermost COUNT frames \n\
2005 and the values of the local variables.\n\
2006 With a negative argument, print outermost -COUNT frames.\n\
2007 Usage: T <count>\n");
2010 add_com_alias ("where", "backtrace", class_alias
, 0);
2011 add_info ("stack", backtrace_command
,
2012 "Backtrace of the stack, or innermost COUNT frames.");
2013 add_info_alias ("s", "stack", 1);
2014 add_info ("frame", frame_info
,
2015 "All about selected stack frame, or frame at ADDR.");
2016 add_info_alias ("f", "frame", 1);
2017 add_info ("locals", locals_info
,
2018 "Local variables of current stack frame.");
2019 add_info ("args", args_info
,
2020 "Argument variables of current stack frame.");
2022 add_com ("l", class_info
, args_plus_locals_info
,
2023 "Argument and local variables of current stack frame.");
2026 add_com ("func", class_stack
, func_command
,
2027 "Select the stack frame that contains <func>.\nUsage: func <name>\n");
2029 add_info ("catch", catch_info
,
2030 "Exceptions that can be caught in the current stack frame.");
2033 add_cmd ("backtrace-limit", class_stack
, set_backtrace_limit_command
,
2034 "Specify maximum number of frames for \"backtrace\" to print by default.",
2036 add_info ("backtrace-limit", backtrace_limit_info
,
2037 "The maximum number of frames for \"backtrace\" to print by default.");