1 /* Print and select stack frames for GDB, the GNU debugger.
3 Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994,
4 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003 Free Software
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 59 Temple Place - Suite 330,
22 Boston, MA 02111-1307, USA. */
26 #include "gdb_string.h"
30 #include "expression.h"
37 #include "breakpoint.h"
44 /* Prototypes for exported functions. */
46 void args_info (char *, int);
48 void locals_info (char *, int);
50 void (*selected_frame_level_changed_hook
) (int);
52 void _initialize_stack (void);
54 void return_command (char *, int);
56 /* Prototypes for local functions. */
58 static void down_command (char *, int);
60 static void down_silently_base (char *);
62 static void down_silently_command (char *, int);
64 static void up_command (char *, int);
66 static void up_silently_base (char *);
68 static void up_silently_command (char *, int);
70 void frame_command (char *, int);
72 static void current_frame_command (char *, int);
74 static void select_frame_command (char *, int);
76 static void print_frame_arg_vars (struct frame_info
*, struct ui_file
*);
78 static void catch_info (char *, int);
80 static void args_plus_locals_info (char *, int);
82 static void print_frame_label_vars (struct frame_info
*, int,
85 static void print_frame_local_vars (struct frame_info
*, int,
88 static int print_block_frame_labels (struct block
*, int *,
91 static int print_block_frame_locals (struct block
*,
96 static void print_frame (struct frame_info
*fi
,
100 struct symtab_and_line sal
);
102 static void backtrace_command (char *, int);
104 struct frame_info
*parse_frame_specification (char *);
106 static void frame_info (char *, int);
108 extern int addressprint
; /* Print addresses, or stay symbolic only? */
110 /* Zero means do things normally; we are interacting directly with the
111 user. One means print the full filename and linenumber when a
112 frame is printed, and do so in a format emacs18/emacs19.22 can
113 parse. Two means print similar annotations, but in many more
114 cases and in a slightly different syntax. */
116 int annotation_level
= 0;
119 struct print_stack_frame_args
121 struct frame_info
*fi
;
127 /* Show or print the frame arguments.
128 Pass the args the way catch_errors wants them. */
129 static int print_stack_frame_stub (void *args
);
131 print_stack_frame_stub (void *args
)
133 struct print_stack_frame_args
*p
= (struct print_stack_frame_args
*) args
;
135 print_frame_info (p
->fi
, p
->level
, p
->source
, p
->args
);
139 /* Show or print a stack frame briefly. FRAME_INFI should be the frame info
140 and LEVEL should be its level in the stack (or -1 for level not defined).
141 This prints the level, the function executing, the arguments,
142 and the file name and line number.
143 If the pc is not at the beginning of the source line,
144 the actual pc is printed at the beginning.
146 If SOURCE is 1, print the source line as well.
147 If SOURCE is -1, print ONLY the source line. */
150 print_stack_frame (struct frame_info
*fi
, int level
, int source
)
152 struct print_stack_frame_args args
;
156 args
.source
= source
;
159 catch_errors (print_stack_frame_stub
, (char *) &args
, "", RETURN_MASK_ALL
);
162 struct print_args_args
165 struct frame_info
*fi
;
166 struct ui_file
*stream
;
169 static int print_args_stub (void *);
171 /* Pass the args the way catch_errors wants them. */
174 print_args_stub (void *args
)
177 struct print_args_args
*p
= (struct print_args_args
*) args
;
179 numargs
= FRAME_NUM_ARGS (p
->fi
);
180 print_frame_args (p
->func
, p
->fi
, numargs
, p
->stream
);
184 /* Print information about a frame for frame "fi" at level "level".
185 Used in "where" output, also used to emit breakpoint or step
187 LEVEL is the level of the frame, or -1 if it is the
188 innermost frame but we don't want to print the level.
189 The meaning of the SOURCE argument is:
190 SRC_LINE: Print only source line
191 LOCATION: Print only location
192 LOC_AND_SRC: Print location and source line. */
195 print_frame_info (struct frame_info
*fi
, int level
, int source
, int args
)
197 struct symtab_and_line sal
;
201 if (get_frame_type (fi
) == DUMMY_FRAME
202 || get_frame_type (fi
) == SIGTRAMP_FRAME
)
204 struct cleanup
*uiout_cleanup
205 = make_cleanup_ui_out_tuple_begin_end (uiout
, "frame");
207 annotate_frame_begin (level
== -1 ? 0 : level
, get_frame_pc (fi
));
209 /* Do this regardless of SOURCE because we don't have any source
210 to list for this frame. */
213 ui_out_text (uiout
, "#");
214 ui_out_field_fmt_int (uiout
, 2, ui_left
, "level", level
);
216 if (ui_out_is_mi_like_p (uiout
))
218 annotate_frame_address ();
219 ui_out_field_core_addr (uiout
, "addr", fi
->pc
);
220 annotate_frame_address_end ();
223 if (get_frame_type (fi
) == DUMMY_FRAME
)
225 annotate_function_call ();
226 ui_out_field_string (uiout
, "func", "<function called from gdb>");
228 else if (get_frame_type (fi
) == SIGTRAMP_FRAME
)
230 annotate_signal_handler_caller ();
231 ui_out_field_string (uiout
, "func", "<signal handler called>");
233 ui_out_text (uiout
, "\n");
234 annotate_frame_end ();
236 do_cleanups (uiout_cleanup
);
240 /* If fi is not the innermost frame, that normally means that fi->pc
241 points to *after* the call instruction, and we want to get the
242 line containing the call, never the next line. But if the next
243 frame is a SIGTRAMP_FRAME or a DUMMY_FRAME, then the next frame
244 was not entered as the result of a call, and we want to get the
245 line containing fi->pc. */
246 find_frame_sal (fi
, &sal
);
248 location_print
= (source
== LOCATION
249 || source
== LOC_AND_ADDRESS
250 || source
== SRC_AND_LOC
);
252 if (location_print
|| !sal
.symtab
)
253 print_frame (fi
, level
, source
, args
, sal
);
255 source_print
= (source
== SRC_LINE
|| source
== SRC_AND_LOC
);
258 set_current_source_symtab_and_line (&sal
);
260 if (source_print
&& sal
.symtab
)
262 struct symtab_and_line cursal
;
264 int mid_statement
= (source
== SRC_LINE
) && (get_frame_pc (fi
) != sal
.pc
);
266 if (annotation_level
)
267 done
= identify_source_line (sal
.symtab
, sal
.line
, mid_statement
,
271 if (print_frame_info_listing_hook
)
272 print_frame_info_listing_hook (sal
.symtab
, sal
.line
, sal
.line
+ 1, 0);
275 /* We used to do this earlier, but that is clearly
276 wrong. This function is used by many different
277 parts of gdb, including normal_stop in infrun.c,
278 which uses this to print out the current PC
279 when we stepi/nexti into the middle of a source
280 line. Only the command line really wants this
281 behavior. Other UIs probably would like the
282 ability to decide for themselves if it is desired. */
283 if (addressprint
&& mid_statement
)
285 ui_out_field_core_addr (uiout
, "addr", get_frame_pc (fi
));
286 ui_out_text (uiout
, "\t");
289 print_source_lines (sal
.symtab
, sal
.line
, sal
.line
+ 1, 0);
292 /* Make sure we have at least a default source file */
293 set_default_source_symtab_and_line ();
294 cursal
= get_current_source_symtab_and_line ();
295 cursal
.line
= max (sal
.line
- get_lines_to_list () / 2, 1);
296 set_current_source_symtab_and_line (&cursal
);
300 set_default_breakpoint (1, get_frame_pc (fi
), sal
.symtab
, sal
.line
);
302 annotate_frame_end ();
304 gdb_flush (gdb_stdout
);
308 print_frame (struct frame_info
*fi
,
312 struct symtab_and_line sal
)
315 register char *funname
= 0;
316 enum language funlang
= language_unknown
;
317 struct ui_stream
*stb
;
318 struct cleanup
*old_chain
;
319 struct cleanup
*list_chain
;
321 stb
= ui_out_stream_new (uiout
);
322 old_chain
= make_cleanup_ui_out_stream_delete (stb
);
324 func
= find_pc_function (frame_address_in_block (fi
));
327 /* In certain pathological cases, the symtabs give the wrong
328 function (when we are in the first function in a file which
329 is compiled without debugging symbols, the previous function
330 is compiled with debugging symbols, and the "foo.o" symbol
331 that is supposed to tell us where the file with debugging symbols
332 ends has been truncated by ar because it is longer than 15
333 characters). This also occurs if the user uses asm() to create
334 a function but not stabs for it (in a file compiled -g).
336 So look in the minimal symbol tables as well, and if it comes
337 up with a larger address for the function use that instead.
338 I don't think this can ever cause any problems; there shouldn't
339 be any minimal symbols in the middle of a function; if this is
340 ever changed many parts of GDB will need to be changed (and we'll
341 create a find_pc_minimal_function or some such). */
343 struct minimal_symbol
*msymbol
= lookup_minimal_symbol_by_pc (frame_address_in_block (fi
));
345 && (SYMBOL_VALUE_ADDRESS (msymbol
)
346 > BLOCK_START (SYMBOL_BLOCK_VALUE (func
))))
349 /* There is no particular reason to think the line number
350 information is wrong. Someone might have just put in
351 a label with asm() but left the line numbers alone. */
352 /* In this case we have no way of knowing the source file
353 and line number, so don't print them. */
356 /* We also don't know anything about the function besides
357 its address and name. */
359 funname
= SYMBOL_NAME (msymbol
);
360 funlang
= SYMBOL_LANGUAGE (msymbol
);
364 /* I'd like to use SYMBOL_SOURCE_NAME() here, to display the
365 demangled name that we already have stored in the symbol
366 table, but we stored a version with DMGL_PARAMS turned
367 on, and here we don't want to display parameters. So call
368 the demangler again, with DMGL_ANSI only. (Yes, I know
369 that printf_symbol_filtered() will again try to demangle
370 the name on the fly, but the issue is that if
371 cplus_demangle() fails here, it'll fail there too. So we
372 want to catch the failure ("demangled==NULL" case below)
373 here, while we still have our hands on the function
376 funname
= SYMBOL_NAME (func
);
377 funlang
= SYMBOL_LANGUAGE (func
);
378 if (funlang
== language_cplus
)
380 demangled
= cplus_demangle (funname
, DMGL_ANSI
);
381 if (demangled
== NULL
)
382 /* If the demangler fails, try the demangled name from
383 the symbol table. This'll have parameters, but
384 that's preferable to diplaying a mangled name. */
385 funname
= SYMBOL_SOURCE_NAME (func
);
391 struct minimal_symbol
*msymbol
= lookup_minimal_symbol_by_pc (frame_address_in_block (fi
));
394 funname
= SYMBOL_NAME (msymbol
);
395 funlang
= SYMBOL_LANGUAGE (msymbol
);
399 annotate_frame_begin (level
== -1 ? 0 : level
, get_frame_pc (fi
));
401 list_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "frame");
405 ui_out_text (uiout
, "#");
406 ui_out_field_fmt_int (uiout
, 2, ui_left
, "level", level
);
409 if (get_frame_pc (fi
) != sal
.pc
411 || source
== LOC_AND_ADDRESS
)
413 annotate_frame_address ();
414 ui_out_field_core_addr (uiout
, "addr", get_frame_pc (fi
));
415 annotate_frame_address_end ();
416 ui_out_text (uiout
, " in ");
418 annotate_frame_function_name ();
419 fprintf_symbol_filtered (stb
->stream
, funname
? funname
: "??", funlang
,
421 ui_out_field_stream (uiout
, "func", stb
);
422 ui_out_wrap_hint (uiout
, " ");
423 annotate_frame_args ();
425 ui_out_text (uiout
, " (");
428 struct print_args_args args
;
429 struct cleanup
*args_list_chain
;
432 args
.stream
= gdb_stdout
;
433 args_list_chain
= make_cleanup_ui_out_list_begin_end (uiout
, "args");
434 catch_errors (print_args_stub
, &args
, "", RETURN_MASK_ALL
);
435 /* FIXME: args must be a list. If one argument is a string it will
436 have " that will not be properly escaped. */
437 /* Invoke ui_out_tuple_end. */
438 do_cleanups (args_list_chain
);
441 ui_out_text (uiout
, ")");
442 if (sal
.symtab
&& sal
.symtab
->filename
)
444 annotate_frame_source_begin ();
445 ui_out_wrap_hint (uiout
, " ");
446 ui_out_text (uiout
, " at ");
447 annotate_frame_source_file ();
448 ui_out_field_string (uiout
, "file", sal
.symtab
->filename
);
449 annotate_frame_source_file_end ();
450 ui_out_text (uiout
, ":");
451 annotate_frame_source_line ();
452 ui_out_field_int (uiout
, "line", sal
.line
);
453 annotate_frame_source_end ();
457 if (!funname
|| (!sal
.symtab
|| !sal
.symtab
->filename
))
459 char *lib
= PC_SOLIB (get_frame_pc (fi
));
462 annotate_frame_where ();
463 ui_out_wrap_hint (uiout
, " ");
464 ui_out_text (uiout
, " from ");
465 ui_out_field_string (uiout
, "from", lib
);
468 #endif /* PC_SOLIB */
470 /* do_cleanups will call ui_out_tuple_end() for us. */
471 do_cleanups (list_chain
);
472 ui_out_text (uiout
, "\n");
473 do_cleanups (old_chain
);
476 /* Show the frame info. If this is the tui, it will be shown in
477 the source display otherwise, nothing is done */
479 show_stack_frame (struct frame_info
*fi
)
484 /* Read a frame specification in whatever the appropriate format is.
485 Call error() if the specification is in any way invalid (i.e.
486 this function never returns NULL). */
489 parse_frame_specification (char *frame_exp
)
493 CORE_ADDR args
[MAXARGS
];
498 char *addr_string
, *p
;
499 struct cleanup
*tmp_cleanup
;
501 while (*frame_exp
== ' ')
506 if (numargs
> MAXARGS
)
507 error ("Too many args in frame specification");
508 /* Parse an argument. */
509 for (p
= frame_exp
; *p
&& *p
!= ' '; p
++)
511 addr_string
= savestring (frame_exp
, p
- frame_exp
);
516 tmp_cleanup
= make_cleanup (xfree
, addr_string
);
518 /* NOTE: we call parse_and_eval and then both
519 value_as_long and value_as_address rather than calling
520 parse_and_eval_long and parse_and_eval_address because
521 of the issue of potential side effects from evaluating
523 vp
= parse_and_eval (addr_string
);
525 level
= value_as_long (vp
);
527 args
[numargs
++] = value_as_address (vp
);
528 do_cleanups (tmp_cleanup
);
531 /* Skip spaces, move to possible next arg. */
541 if (deprecated_selected_frame
== NULL
)
542 error ("No selected frame.");
543 return deprecated_selected_frame
;
547 struct frame_info
*fid
=
548 find_relative_frame (get_current_frame (), &level
);
549 struct frame_info
*tfid
;
552 /* find_relative_frame was successful */
555 /* If SETUP_ARBITRARY_FRAME is defined, then frame specifications
556 take at least 2 addresses. It is important to detect this case
557 here so that "frame 100" does not give a confusing error message
558 like "frame specification requires two addresses". This of course
559 does not solve the "frame 100" problem for machines on which
560 a frame specification can be made with one address. To solve
561 that, we need a new syntax for a specifying a frame by address.
562 I think the cleanest syntax is $frame(0x45) ($frame(0x23,0x45) for
563 two args, etc.), but people might think that is too much typing,
564 so I guess *0x23,0x45 would be a possible alternative (commas
565 really should be used instead of spaces to delimit; using spaces
566 normally works in an expression). */
567 #ifdef SETUP_ARBITRARY_FRAME
568 error ("No frame %s", paddr_d (args
[0]));
571 /* If (s)he specifies the frame with an address, he deserves what
572 (s)he gets. Still, give the highest one that matches. */
574 for (fid
= get_current_frame ();
575 fid
&& get_frame_base (fid
) != args
[0];
576 fid
= get_prev_frame (fid
))
580 while ((tfid
= get_prev_frame (fid
)) &&
581 (get_frame_base (tfid
) == args
[0]))
584 /* We couldn't identify the frame as an existing frame, but
585 perhaps we can create one with a single argument. */
589 #ifdef SETUP_ARBITRARY_FRAME
590 return SETUP_ARBITRARY_FRAME (numargs
, args
);
592 /* Usual case. Do it here rather than have everyone supply
593 a SETUP_ARBITRARY_FRAME that does this. */
595 return create_new_frame (args
[0], 0);
596 error ("Too many args in frame specification");
603 /* FRAME_ARGS_ADDRESS_CORRECT is just like FRAME_ARGS_ADDRESS except
604 that if it is unsure about the answer, it returns 0
605 instead of guessing (this happens on the VAX and i960, for example).
607 On most machines, we never have to guess about the args address,
608 so FRAME_ARGS_ADDRESS{,_CORRECT} are the same. */
609 #if !defined (FRAME_ARGS_ADDRESS_CORRECT)
610 #define FRAME_ARGS_ADDRESS_CORRECT FRAME_ARGS_ADDRESS
613 /* Print verbosely the selected frame or the frame at address ADDR.
614 This means absolutely all information in the frame is printed. */
617 frame_info (char *addr_exp
, int from_tty
)
619 struct frame_info
*fi
;
620 struct symtab_and_line sal
;
623 struct frame_info
*calling_frame_info
;
624 int i
, count
, numregs
;
626 enum language funlang
= language_unknown
;
628 if (!target_has_stack
)
631 fi
= parse_frame_specification (addr_exp
);
633 error ("Invalid frame specified.");
635 find_frame_sal (fi
, &sal
);
636 func
= get_frame_function (fi
);
637 /* FIXME: cagney/2002-11-28: Why bother? Won't sal.symtab contain
639 s
= find_pc_symtab (get_frame_pc (fi
));
642 /* I'd like to use SYMBOL_SOURCE_NAME() here, to display
643 * the demangled name that we already have stored in
644 * the symbol table, but we stored a version with
645 * DMGL_PARAMS turned on, and here we don't want
646 * to display parameters. So call the demangler again,
647 * with DMGL_ANSI only. RT
648 * (Yes, I know that printf_symbol_filtered() will
649 * again try to demangle the name on the fly, but
650 * the issue is that if cplus_demangle() fails here,
651 * it'll fail there too. So we want to catch the failure
652 * ("demangled==NULL" case below) here, while we still
653 * have our hands on the function symbol.)
656 funname
= SYMBOL_NAME (func
);
657 funlang
= SYMBOL_LANGUAGE (func
);
658 if (funlang
== language_cplus
)
660 demangled
= cplus_demangle (funname
, DMGL_ANSI
);
661 /* If the demangler fails, try the demangled name
662 * from the symbol table. This'll have parameters,
663 * but that's preferable to diplaying a mangled name.
665 if (demangled
== NULL
)
666 funname
= SYMBOL_SOURCE_NAME (func
);
671 register struct minimal_symbol
*msymbol
= lookup_minimal_symbol_by_pc (get_frame_pc (fi
));
674 funname
= SYMBOL_NAME (msymbol
);
675 funlang
= SYMBOL_LANGUAGE (msymbol
);
678 calling_frame_info
= get_prev_frame (fi
);
680 if (!addr_exp
&& frame_relative_level (deprecated_selected_frame
) >= 0)
682 printf_filtered ("Stack level %d, frame at ",
683 frame_relative_level (deprecated_selected_frame
));
684 print_address_numeric (get_frame_base (fi
), 1, gdb_stdout
);
685 printf_filtered (":\n");
689 printf_filtered ("Stack frame at ");
690 print_address_numeric (get_frame_base (fi
), 1, gdb_stdout
);
691 printf_filtered (":\n");
693 printf_filtered (" %s = ", REGISTER_NAME (PC_REGNUM
));
694 print_address_numeric (get_frame_pc (fi
), 1, gdb_stdout
);
699 printf_filtered (" in ");
700 fprintf_symbol_filtered (gdb_stdout
, funname
, funlang
,
701 DMGL_ANSI
| DMGL_PARAMS
);
705 printf_filtered (" (%s:%d)", sal
.symtab
->filename
, sal
.line
);
706 puts_filtered ("; ");
708 printf_filtered ("saved %s ", REGISTER_NAME (PC_REGNUM
));
709 print_address_numeric (frame_pc_unwind (fi
), 1, gdb_stdout
);
710 printf_filtered ("\n");
714 frameless
= FRAMELESS_FUNCTION_INVOCATION (fi
);
716 printf_filtered (" (FRAMELESS),");
719 if (calling_frame_info
)
721 printf_filtered (" called by frame at ");
722 print_address_numeric (get_frame_base (calling_frame_info
),
725 if (get_next_frame (fi
) && calling_frame_info
)
728 if (get_next_frame (fi
))
730 printf_filtered (" caller of frame at ");
731 print_address_numeric (get_frame_base (get_next_frame (fi
)), 1,
734 if (get_next_frame (fi
) || calling_frame_info
)
735 puts_filtered ("\n");
737 printf_filtered (" source language %s.\n",
738 language_str (s
->language
));
740 #ifdef PRINT_EXTRA_FRAME_INFO
741 PRINT_EXTRA_FRAME_INFO (fi
);
745 /* Address of the argument list for this frame, or 0. */
746 CORE_ADDR arg_list
= FRAME_ARGS_ADDRESS_CORRECT (fi
);
747 /* Number of args for this frame, or -1 if unknown. */
751 printf_filtered (" Arglist at unknown address.\n");
754 printf_filtered (" Arglist at ");
755 print_address_numeric (arg_list
, 1, gdb_stdout
);
756 printf_filtered (",");
758 numargs
= FRAME_NUM_ARGS (fi
);
760 puts_filtered (" args: ");
761 else if (numargs
== 0)
762 puts_filtered (" no args.");
763 else if (numargs
== 1)
764 puts_filtered (" 1 arg: ");
766 printf_filtered (" %d args: ", numargs
);
767 print_frame_args (func
, fi
, numargs
, gdb_stdout
);
768 puts_filtered ("\n");
772 /* Address of the local variables for this frame, or 0. */
773 CORE_ADDR arg_list
= FRAME_LOCALS_ADDRESS (fi
);
776 printf_filtered (" Locals at unknown address,");
779 printf_filtered (" Locals at ");
780 print_address_numeric (arg_list
, 1, gdb_stdout
);
781 printf_filtered (",");
785 if (FRAME_INIT_SAVED_REGS_P ()
786 && get_frame_saved_regs (fi
) == NULL
)
787 FRAME_INIT_SAVED_REGS (fi
);
788 /* Print as much information as possible on the location of all the
799 /* The sp is special; what's displayed isn't the save address, but
800 the value of the previous frame's sp. This is a legacy thing,
801 at one stage the frame cached the previous frame's SP instead
802 of its address, hence it was easiest to just display the cached
806 /* Find out the location of the saved stack pointer with out
807 actually evaluating it. */
808 frame_register_unwind (fi
, SP_REGNUM
, &optimized
, &lval
, &addr
,
810 if (!optimized
&& lval
== not_lval
)
812 void *value
= alloca (MAX_REGISTER_RAW_SIZE
);
814 frame_register_unwind (fi
, SP_REGNUM
, &optimized
, &lval
, &addr
,
816 sp
= extract_address (value
, REGISTER_RAW_SIZE (SP_REGNUM
));
817 printf_filtered (" Previous frame's sp is ");
818 print_address_numeric (sp
, 1, gdb_stdout
);
819 printf_filtered ("\n");
822 else if (!optimized
&& lval
== lval_memory
)
824 printf_filtered (" Previous frame's sp at ");
825 print_address_numeric (addr
, 1, gdb_stdout
);
826 printf_filtered ("\n");
829 else if (!optimized
&& lval
== lval_register
)
831 printf_filtered (" Previous frame's sp in %s\n",
832 REGISTER_NAME (realnum
));
835 /* else keep quiet. */
839 numregs
= NUM_REGS
+ NUM_PSEUDO_REGS
;
840 for (i
= 0; i
< numregs
; i
++)
843 /* Find out the location of the saved register without
844 fetching the corresponding value. */
845 frame_register_unwind (fi
, i
, &optimized
, &lval
, &addr
, &realnum
,
847 /* For moment, only display registers that were saved on the
849 if (!optimized
&& lval
== lval_memory
)
852 puts_filtered (" Saved registers:\n ");
856 printf_filtered (" %s at ", REGISTER_NAME (i
));
857 print_address_numeric (addr
, 1, gdb_stdout
);
861 if (count
|| need_nl
)
862 puts_filtered ("\n");
867 /* Set a limit on the number of frames printed by default in a
870 static int backtrace_limit
;
873 set_backtrace_limit_command (char *count_exp
, int from_tty
)
875 int count
= parse_and_eval_long (count_exp
);
878 error ("Negative argument not meaningful as backtrace limit.");
880 backtrace_limit
= count
;
884 backtrace_limit_info (char *arg
, int from_tty
)
887 error ("\"Info backtrace-limit\" takes no arguments.");
889 printf_unfiltered ("Backtrace limit: %d.\n", backtrace_limit
);
893 /* Print briefly all stack frames or just the innermost COUNT frames. */
895 static void backtrace_command_1 (char *count_exp
, int show_locals
,
898 backtrace_command_1 (char *count_exp
, int show_locals
, int from_tty
)
900 struct frame_info
*fi
;
903 register struct frame_info
*trailing
;
904 register int trailing_level
;
906 if (!target_has_stack
)
909 /* The following code must do two things. First, it must
910 set the variable TRAILING to the frame from which we should start
911 printing. Second, it must set the variable count to the number
912 of frames which we should print, or -1 if all of them. */
913 trailing
= get_current_frame ();
915 /* The target can be in a state where there is no valid frames
916 (e.g., just connected). */
917 if (trailing
== NULL
)
923 count
= parse_and_eval_long (count_exp
);
926 struct frame_info
*current
;
931 while (current
&& count
--)
934 current
= get_prev_frame (current
);
937 /* Will stop when CURRENT reaches the top of the stack. TRAILING
938 will be COUNT below it. */
942 trailing
= get_prev_frame (trailing
);
943 current
= get_prev_frame (current
);
955 struct partial_symtab
*ps
;
957 /* Read in symbols for all of the frames. Need to do this in
958 a separate pass so that "Reading in symbols for xxx" messages
959 don't screw up the appearance of the backtrace. Also
960 if people have strong opinions against reading symbols for
961 backtrace this may have to be an option. */
965 fi
= get_prev_frame (fi
))
968 ps
= find_pc_psymtab (frame_address_in_block (fi
));
970 PSYMTAB_TO_SYMTAB (ps
); /* Force syms to come in */
974 for (i
= 0, fi
= trailing
;
976 i
++, fi
= get_prev_frame (fi
))
980 /* Don't use print_stack_frame; if an error() occurs it probably
981 means further attempts to backtrace would fail (on the other
982 hand, perhaps the code does or could be fixed to make sure
983 the frame->prev field gets set to NULL in that case). */
984 print_frame_info (fi
, trailing_level
+ i
, 0, 1);
986 print_frame_local_vars (fi
, 1, gdb_stdout
);
989 /* If we've stopped before the end, mention that. */
991 printf_filtered ("(More stack frames follow...)\n");
995 backtrace_command (char *arg
, int from_tty
)
997 struct cleanup
*old_chain
= (struct cleanup
*) NULL
;
998 char **argv
= (char **) NULL
;
999 int argIndicatingFullTrace
= (-1), totArgLen
= 0, argc
= 0;
1002 if (arg
!= (char *) NULL
)
1006 argv
= buildargv (arg
);
1007 old_chain
= make_cleanup_freeargv (argv
);
1009 for (i
= 0; (argv
[i
] != (char *) NULL
); i
++)
1013 for (j
= 0; (j
< strlen (argv
[i
])); j
++)
1014 argv
[i
][j
] = tolower (argv
[i
][j
]);
1016 if (argIndicatingFullTrace
< 0 && subset_compare (argv
[i
], "full"))
1017 argIndicatingFullTrace
= argc
;
1021 totArgLen
+= strlen (argv
[i
]);
1025 if (argIndicatingFullTrace
>= 0)
1029 argPtr
= (char *) xmalloc (totArgLen
+ 1);
1034 memset (argPtr
, 0, totArgLen
+ 1);
1035 for (i
= 0; (i
< (argc
+ 1)); i
++)
1037 if (i
!= argIndicatingFullTrace
)
1039 strcat (argPtr
, argv
[i
]);
1040 strcat (argPtr
, " ");
1046 argPtr
= (char *) NULL
;
1050 backtrace_command_1 (argPtr
, (argIndicatingFullTrace
>= 0), from_tty
);
1052 if (argIndicatingFullTrace
>= 0 && totArgLen
> 0)
1056 do_cleanups (old_chain
);
1059 static void backtrace_full_command (char *arg
, int from_tty
);
1061 backtrace_full_command (char *arg
, int from_tty
)
1063 backtrace_command_1 (arg
, 1, from_tty
);
1067 /* Print the local variables of a block B active in FRAME.
1068 Return 1 if any variables were printed; 0 otherwise. */
1071 print_block_frame_locals (struct block
*b
, register struct frame_info
*fi
,
1072 int num_tabs
, register struct ui_file
*stream
)
1075 register struct symbol
*sym
;
1076 register int values_printed
= 0;
1078 ALL_BLOCK_SYMBOLS (b
, i
, sym
)
1080 switch (SYMBOL_CLASS (sym
))
1087 for (j
= 0; j
< num_tabs
; j
++)
1088 fputs_filtered ("\t", stream
);
1089 fputs_filtered (SYMBOL_SOURCE_NAME (sym
), stream
);
1090 fputs_filtered (" = ", stream
);
1091 print_variable_value (sym
, fi
, stream
);
1092 fprintf_filtered (stream
, "\n");
1096 /* Ignore symbols which are not locals. */
1100 return values_printed
;
1103 /* Same, but print labels. */
1106 print_block_frame_labels (struct block
*b
, int *have_default
,
1107 register struct ui_file
*stream
)
1110 register struct symbol
*sym
;
1111 register int values_printed
= 0;
1113 ALL_BLOCK_SYMBOLS (b
, i
, sym
)
1115 if (STREQ (SYMBOL_NAME (sym
), "default"))
1121 if (SYMBOL_CLASS (sym
) == LOC_LABEL
)
1123 struct symtab_and_line sal
;
1124 sal
= find_pc_line (SYMBOL_VALUE_ADDRESS (sym
), 0);
1126 fputs_filtered (SYMBOL_SOURCE_NAME (sym
), stream
);
1129 fprintf_filtered (stream
, " ");
1130 print_address_numeric (SYMBOL_VALUE_ADDRESS (sym
), 1, stream
);
1132 fprintf_filtered (stream
, " in file %s, line %d\n",
1133 sal
.symtab
->filename
, sal
.line
);
1136 return values_printed
;
1139 /* Print on STREAM all the local variables in frame FRAME,
1140 including all the blocks active in that frame
1143 Returns 1 if the job was done,
1144 or 0 if nothing was printed because we have no info
1145 on the function running in FRAME. */
1148 print_frame_local_vars (register struct frame_info
*fi
, register int num_tabs
,
1149 register struct ui_file
*stream
)
1151 register struct block
*block
= get_frame_block (fi
, 0);
1152 register int values_printed
= 0;
1156 fprintf_filtered (stream
, "No symbol table info available.\n");
1162 if (print_block_frame_locals (block
, fi
, num_tabs
, stream
))
1164 /* After handling the function's top-level block, stop.
1165 Don't continue to its superblock, the block of
1166 per-file symbols. */
1167 if (BLOCK_FUNCTION (block
))
1169 block
= BLOCK_SUPERBLOCK (block
);
1172 if (!values_printed
)
1174 fprintf_filtered (stream
, "No locals.\n");
1178 /* Same, but print labels. */
1181 print_frame_label_vars (register struct frame_info
*fi
, int this_level_only
,
1182 register struct ui_file
*stream
)
1184 register struct blockvector
*bl
;
1185 register struct block
*block
= get_frame_block (fi
, 0);
1186 register int values_printed
= 0;
1187 int index
, have_default
= 0;
1188 char *blocks_printed
;
1189 CORE_ADDR pc
= get_frame_pc (fi
);
1193 fprintf_filtered (stream
, "No symbol table info available.\n");
1197 bl
= blockvector_for_pc (BLOCK_END (block
) - 4, &index
);
1198 blocks_printed
= (char *) alloca (BLOCKVECTOR_NBLOCKS (bl
) * sizeof (char));
1199 memset (blocks_printed
, 0, BLOCKVECTOR_NBLOCKS (bl
) * sizeof (char));
1203 CORE_ADDR end
= BLOCK_END (block
) - 4;
1206 if (bl
!= blockvector_for_pc (end
, &index
))
1207 error ("blockvector blotch");
1208 if (BLOCKVECTOR_BLOCK (bl
, index
) != block
)
1209 error ("blockvector botch");
1210 last_index
= BLOCKVECTOR_NBLOCKS (bl
);
1213 /* Don't print out blocks that have gone by. */
1214 while (index
< last_index
1215 && BLOCK_END (BLOCKVECTOR_BLOCK (bl
, index
)) < pc
)
1218 while (index
< last_index
1219 && BLOCK_END (BLOCKVECTOR_BLOCK (bl
, index
)) < end
)
1221 if (blocks_printed
[index
] == 0)
1223 if (print_block_frame_labels (BLOCKVECTOR_BLOCK (bl
, index
), &have_default
, stream
))
1225 blocks_printed
[index
] = 1;
1231 if (values_printed
&& this_level_only
)
1234 /* After handling the function's top-level block, stop.
1235 Don't continue to its superblock, the block of
1236 per-file symbols. */
1237 if (BLOCK_FUNCTION (block
))
1239 block
= BLOCK_SUPERBLOCK (block
);
1242 if (!values_printed
&& !this_level_only
)
1244 fprintf_filtered (stream
, "No catches.\n");
1250 locals_info (char *args
, int from_tty
)
1252 if (!deprecated_selected_frame
)
1253 error ("No frame selected.");
1254 print_frame_local_vars (deprecated_selected_frame
, 0, gdb_stdout
);
1258 catch_info (char *ignore
, int from_tty
)
1260 struct symtab_and_line
*sal
;
1262 /* Check for target support for exception handling */
1263 sal
= target_enable_exception_callback (EX_EVENT_CATCH
, 1);
1266 /* Currently not handling this */
1267 /* Ideally, here we should interact with the C++ runtime
1268 system to find the list of active handlers, etc. */
1269 fprintf_filtered (gdb_stdout
, "Info catch not supported with this target/compiler combination.\n");
1271 if (!deprecated_selected_frame
)
1272 error ("No frame selected.");
1277 /* Assume g++ compiled code -- old v 4.16 behaviour */
1278 if (!deprecated_selected_frame
)
1279 error ("No frame selected.");
1281 print_frame_label_vars (deprecated_selected_frame
, 0, gdb_stdout
);
1286 print_frame_arg_vars (register struct frame_info
*fi
,
1287 register struct ui_file
*stream
)
1289 struct symbol
*func
= get_frame_function (fi
);
1290 register struct block
*b
;
1292 register struct symbol
*sym
, *sym2
;
1293 register int values_printed
= 0;
1297 fprintf_filtered (stream
, "No symbol table info available.\n");
1301 b
= SYMBOL_BLOCK_VALUE (func
);
1302 ALL_BLOCK_SYMBOLS (b
, i
, sym
)
1304 switch (SYMBOL_CLASS (sym
))
1310 case LOC_REGPARM_ADDR
:
1311 case LOC_BASEREG_ARG
:
1313 fputs_filtered (SYMBOL_SOURCE_NAME (sym
), stream
);
1314 fputs_filtered (" = ", stream
);
1316 /* We have to look up the symbol because arguments can have
1317 two entries (one a parameter, one a local) and the one we
1318 want is the local, which lookup_symbol will find for us.
1319 This includes gcc1 (not gcc2) on the sparc when passing a
1320 small structure and gcc2 when the argument type is float
1321 and it is passed as a double and converted to float by
1322 the prologue (in the latter case the type of the LOC_ARG
1323 symbol is double and the type of the LOC_LOCAL symbol is
1324 float). There are also LOC_ARG/LOC_REGISTER pairs which
1325 are not combined in symbol-reading. */
1327 sym2
= lookup_symbol (SYMBOL_NAME (sym
),
1328 b
, VAR_NAMESPACE
, (int *) NULL
, (struct symtab
**) NULL
);
1329 print_variable_value (sym2
, fi
, stream
);
1330 fprintf_filtered (stream
, "\n");
1334 /* Don't worry about things which aren't arguments. */
1338 if (!values_printed
)
1340 fprintf_filtered (stream
, "No arguments.\n");
1345 args_info (char *ignore
, int from_tty
)
1347 if (!deprecated_selected_frame
)
1348 error ("No frame selected.");
1349 print_frame_arg_vars (deprecated_selected_frame
, gdb_stdout
);
1354 args_plus_locals_info (char *ignore
, int from_tty
)
1356 args_info (ignore
, from_tty
);
1357 locals_info (ignore
, from_tty
);
1361 /* Select frame FI. Also print the stack frame and show the source if
1362 this is the tui version. */
1364 select_and_print_frame (struct frame_info
*fi
)
1369 print_stack_frame (fi
, frame_relative_level (fi
), 1);
1373 /* Return the symbol-block in which the selected frame is executing.
1374 Can return zero under various legitimate circumstances.
1376 If ADDR_IN_BLOCK is non-zero, set *ADDR_IN_BLOCK to the relevant
1377 code address within the block returned. We use this to decide
1378 which macros are in scope. */
1381 get_selected_block (CORE_ADDR
*addr_in_block
)
1383 if (!target_has_stack
)
1386 /* NOTE: cagney/2002-11-28: Why go to all this effort to not create
1387 a selected/current frame? Perhaphs this function is called,
1388 indirectly, by WFI in "infrun.c" where avoiding the creation of
1389 an inner most frame is very important (it slows down single
1390 step). I suspect, though that this was true in the deep dark
1391 past but is no longer the case. A mindless look at all the
1392 callers tends to support this theory. I think we should be able
1393 to assume that there is always a selcted frame. */
1394 /* gdb_assert (deprecated_selected_frame != NULL); So, do you feel
1396 if (!deprecated_selected_frame
)
1398 CORE_ADDR pc
= read_pc ();
1399 if (addr_in_block
!= NULL
)
1400 *addr_in_block
= pc
;
1401 return block_for_pc (pc
);
1403 return get_frame_block (deprecated_selected_frame
, addr_in_block
);
1406 /* Find a frame a certain number of levels away from FRAME.
1407 LEVEL_OFFSET_PTR points to an int containing the number of levels.
1408 Positive means go to earlier frames (up); negative, the reverse.
1409 The int that contains the number of levels is counted toward
1410 zero as the frames for those levels are found.
1411 If the top or bottom frame is reached, that frame is returned,
1412 but the final value of *LEVEL_OFFSET_PTR is nonzero and indicates
1413 how much farther the original request asked to go. */
1416 find_relative_frame (register struct frame_info
*frame
,
1417 register int *level_offset_ptr
)
1419 register struct frame_info
*prev
;
1420 register struct frame_info
*frame1
;
1422 /* Going up is simple: just do get_prev_frame enough times
1423 or until initial frame is reached. */
1424 while (*level_offset_ptr
> 0)
1426 prev
= get_prev_frame (frame
);
1429 (*level_offset_ptr
)--;
1432 /* Going down is just as simple. */
1433 if (*level_offset_ptr
< 0)
1435 while (*level_offset_ptr
< 0)
1437 frame1
= get_next_frame (frame
);
1441 (*level_offset_ptr
)++;
1447 /* The "select_frame" command. With no arg, NOP.
1448 With arg LEVEL_EXP, select the frame at level LEVEL if it is a
1449 valid level. Otherwise, treat level_exp as an address expression
1450 and select it. See parse_frame_specification for more info on proper
1451 frame expressions. */
1455 select_frame_command_wrapper (char *level_exp
, int from_tty
)
1457 select_frame_command (level_exp
, from_tty
);
1461 select_frame_command (char *level_exp
, int from_tty
)
1463 struct frame_info
*frame
;
1464 int level
= frame_relative_level (deprecated_selected_frame
);
1466 if (!target_has_stack
)
1467 error ("No stack.");
1469 frame
= parse_frame_specification (level_exp
);
1471 select_frame (frame
);
1472 if (level
!= frame_relative_level (deprecated_selected_frame
))
1473 selected_frame_level_changed_event (frame_relative_level (deprecated_selected_frame
));
1476 /* The "frame" command. With no arg, print selected frame briefly.
1477 With arg, behaves like select_frame and then prints the selected
1481 frame_command (char *level_exp
, int from_tty
)
1483 select_frame_command (level_exp
, from_tty
);
1484 print_stack_frame (deprecated_selected_frame
,
1485 frame_relative_level (deprecated_selected_frame
), 1);
1488 /* The XDB Compatibility command to print the current frame. */
1491 current_frame_command (char *level_exp
, int from_tty
)
1493 if (target_has_stack
== 0 || deprecated_selected_frame
== 0)
1494 error ("No stack.");
1495 print_stack_frame (deprecated_selected_frame
,
1496 frame_relative_level (deprecated_selected_frame
), 1);
1499 /* Select the frame up one or COUNT stack levels
1500 from the previously selected frame, and print it briefly. */
1504 up_silently_base (char *count_exp
)
1506 register struct frame_info
*fi
;
1507 int count
= 1, count1
;
1509 count
= parse_and_eval_long (count_exp
);
1512 if (target_has_stack
== 0 || deprecated_selected_frame
== 0)
1513 error ("No stack.");
1515 fi
= find_relative_frame (deprecated_selected_frame
, &count1
);
1516 if (count1
!= 0 && count_exp
== 0)
1517 error ("Initial frame selected; you cannot go up.");
1519 selected_frame_level_changed_event (frame_relative_level (deprecated_selected_frame
));
1523 up_silently_command (char *count_exp
, int from_tty
)
1525 up_silently_base (count_exp
);
1529 up_command (char *count_exp
, int from_tty
)
1531 up_silently_base (count_exp
);
1532 print_stack_frame (deprecated_selected_frame
,
1533 frame_relative_level (deprecated_selected_frame
), 1);
1536 /* Select the frame down one or COUNT stack levels
1537 from the previously selected frame, and print it briefly. */
1541 down_silently_base (char *count_exp
)
1543 register struct frame_info
*frame
;
1544 int count
= -1, count1
;
1546 count
= -parse_and_eval_long (count_exp
);
1549 if (target_has_stack
== 0 || deprecated_selected_frame
== 0)
1550 error ("No stack.");
1552 frame
= find_relative_frame (deprecated_selected_frame
, &count1
);
1553 if (count1
!= 0 && count_exp
== 0)
1556 /* We only do this if count_exp is not specified. That way "down"
1557 means to really go down (and let me know if that is
1558 impossible), but "down 9999" can be used to mean go all the way
1559 down without getting an error. */
1561 error ("Bottom (i.e., innermost) frame selected; you cannot go down.");
1564 select_frame (frame
);
1565 selected_frame_level_changed_event (frame_relative_level (deprecated_selected_frame
));
1570 down_silently_command (char *count_exp
, int from_tty
)
1572 down_silently_base (count_exp
);
1576 down_command (char *count_exp
, int from_tty
)
1578 down_silently_base (count_exp
);
1579 print_stack_frame (deprecated_selected_frame
,
1580 frame_relative_level (deprecated_selected_frame
), 1);
1584 return_command (char *retval_exp
, int from_tty
)
1586 struct symbol
*thisfun
;
1587 CORE_ADDR selected_frame_addr
;
1588 CORE_ADDR selected_frame_pc
;
1589 struct frame_info
*frame
;
1590 struct value
*return_value
= NULL
;
1592 if (deprecated_selected_frame
== NULL
)
1593 error ("No selected frame.");
1594 thisfun
= get_frame_function (deprecated_selected_frame
);
1595 selected_frame_addr
= get_frame_base (deprecated_selected_frame
);
1596 selected_frame_pc
= get_frame_pc (deprecated_selected_frame
);
1598 /* Compute the return value (if any -- possibly getting errors here). */
1602 struct type
*return_type
= NULL
;
1604 return_value
= parse_and_eval (retval_exp
);
1606 /* Cast return value to the return type of the function. */
1607 if (thisfun
!= NULL
)
1608 return_type
= TYPE_TARGET_TYPE (SYMBOL_TYPE (thisfun
));
1609 if (return_type
== NULL
)
1610 return_type
= builtin_type_int
;
1611 return_value
= value_cast (return_type
, return_value
);
1613 /* Make sure we have fully evaluated it, since
1614 it might live in the stack frame we're about to pop. */
1615 if (VALUE_LAZY (return_value
))
1616 value_fetch_lazy (return_value
);
1619 /* If interactive, require confirmation. */
1625 if (!query ("Make %s return now? ", SYMBOL_SOURCE_NAME (thisfun
)))
1627 error ("Not confirmed.");
1631 else if (!query ("Make selected stack frame return now? "))
1632 error ("Not confirmed.");
1635 /* FIXME: cagney/2003-01-18: Rather than pop each frame in turn,
1636 this code should just go straight to the relevant frame and pop
1639 /* Do the real work. Pop until the specified frame is current. We
1640 use this method because the deprecated_selected_frame is not valid after
1641 a POP_FRAME. The pc comparison makes this work even if the
1642 selected frame shares its fp with another frame. */
1644 while (selected_frame_addr
!= get_frame_base (frame
= get_current_frame ())
1645 || selected_frame_pc
!= get_frame_pc (frame
))
1646 frame_pop (get_current_frame ());
1648 /* Then pop that frame. */
1650 frame_pop (get_current_frame ());
1652 /* Compute the return value (if any) and store in the place
1653 for return values. */
1656 set_return_value (return_value
);
1658 /* If we are at the end of a call dummy now, pop the dummy frame too. */
1660 /* FIXME: cagney/2003-01-18: This is silly. Instead of popping all
1661 the frames except the dummy, and then, as an afterthought,
1662 popping the dummy frame, this code should just pop through to the
1665 if (CALL_DUMMY_HAS_COMPLETED (read_pc(), read_sp (),
1666 get_frame_base (get_current_frame ())))
1667 frame_pop (get_current_frame ());
1669 /* If interactive, print the frame that is now current. */
1672 frame_command ("0", 1);
1674 select_frame_command ("0", 0);
1677 /* Sets the scope to input function name, provided that the
1678 function is within the current stack frame */
1680 struct function_bounds
1682 CORE_ADDR low
, high
;
1685 static void func_command (char *arg
, int from_tty
);
1687 func_command (char *arg
, int from_tty
)
1689 struct frame_info
*fp
;
1691 struct symtabs_and_lines sals
;
1694 struct function_bounds
*func_bounds
= (struct function_bounds
*) NULL
;
1696 if (arg
!= (char *) NULL
)
1699 fp
= parse_frame_specification ("0");
1700 sals
= decode_line_spec (arg
, 1);
1701 func_bounds
= (struct function_bounds
*) xmalloc (
1702 sizeof (struct function_bounds
) * sals
.nelts
);
1703 for (i
= 0; (i
< sals
.nelts
&& !found
); i
++)
1705 if (sals
.sals
[i
].pc
== (CORE_ADDR
) 0 ||
1706 find_pc_partial_function (sals
.sals
[i
].pc
,
1708 &func_bounds
[i
].low
,
1709 &func_bounds
[i
].high
) == 0)
1711 func_bounds
[i
].low
=
1712 func_bounds
[i
].high
= (CORE_ADDR
) NULL
;
1718 for (i
= 0; (i
< sals
.nelts
&& !found
); i
++)
1719 found
= (get_frame_pc (fp
) >= func_bounds
[i
].low
&&
1720 get_frame_pc (fp
) < func_bounds
[i
].high
);
1724 fp
= find_relative_frame (fp
, &level
);
1727 while (!found
&& level
== 0);
1730 xfree (func_bounds
);
1733 printf_filtered ("'%s' not within current stack frame.\n", arg
);
1734 else if (fp
!= deprecated_selected_frame
)
1735 select_and_print_frame (fp
);
1738 /* Gets the language of the current frame. */
1741 get_frame_language (void)
1743 register struct symtab
*s
;
1744 enum language flang
; /* The language of the current frame */
1746 if (deprecated_selected_frame
)
1748 s
= find_pc_symtab (get_frame_pc (deprecated_selected_frame
));
1750 flang
= s
->language
;
1752 flang
= language_unknown
;
1755 flang
= language_unknown
;
1761 _initialize_stack (void)
1764 backtrace_limit
= 30;
1767 add_com ("return", class_stack
, return_command
,
1768 "Make selected stack frame return to its caller.\n\
1769 Control remains in the debugger, but when you continue\n\
1770 execution will resume in the frame above the one now selected.\n\
1771 If an argument is given, it is an expression for the value to return.");
1773 add_com ("up", class_stack
, up_command
,
1774 "Select and print stack frame that called this one.\n\
1775 An argument says how many frames up to go.");
1776 add_com ("up-silently", class_support
, up_silently_command
,
1777 "Same as the `up' command, but does not print anything.\n\
1778 This is useful in command scripts.");
1780 add_com ("down", class_stack
, down_command
,
1781 "Select and print stack frame called by this one.\n\
1782 An argument says how many frames down to go.");
1783 add_com_alias ("do", "down", class_stack
, 1);
1784 add_com_alias ("dow", "down", class_stack
, 1);
1785 add_com ("down-silently", class_support
, down_silently_command
,
1786 "Same as the `down' command, but does not print anything.\n\
1787 This is useful in command scripts.");
1789 add_com ("frame", class_stack
, frame_command
,
1790 "Select and print a stack frame.\n\
1791 With no argument, print the selected stack frame. (See also \"info frame\").\n\
1792 An argument specifies the frame to select.\n\
1793 It can be a stack frame number or the address of the frame.\n\
1794 With argument, nothing is printed if input is coming from\n\
1795 a command file or a user-defined command.");
1797 add_com_alias ("f", "frame", class_stack
, 1);
1801 add_com ("L", class_stack
, current_frame_command
,
1802 "Print the current stack frame.\n");
1803 add_com_alias ("V", "frame", class_stack
, 1);
1805 add_com ("select-frame", class_stack
, select_frame_command
,
1806 "Select a stack frame without printing anything.\n\
1807 An argument specifies the frame to select.\n\
1808 It can be a stack frame number or the address of the frame.\n");
1810 add_com ("backtrace", class_stack
, backtrace_command
,
1811 "Print backtrace of all stack frames, or innermost COUNT frames.\n\
1812 With a negative argument, print outermost -COUNT frames.\n\
1813 Use of the 'full' qualifier also prints the values of the local variables.\n");
1814 add_com_alias ("bt", "backtrace", class_stack
, 0);
1817 add_com_alias ("t", "backtrace", class_stack
, 0);
1818 add_com ("T", class_stack
, backtrace_full_command
,
1819 "Print backtrace of all stack frames, or innermost COUNT frames \n\
1820 and the values of the local variables.\n\
1821 With a negative argument, print outermost -COUNT frames.\n\
1822 Usage: T <count>\n");
1825 add_com_alias ("where", "backtrace", class_alias
, 0);
1826 add_info ("stack", backtrace_command
,
1827 "Backtrace of the stack, or innermost COUNT frames.");
1828 add_info_alias ("s", "stack", 1);
1829 add_info ("frame", frame_info
,
1830 "All about selected stack frame, or frame at ADDR.");
1831 add_info_alias ("f", "frame", 1);
1832 add_info ("locals", locals_info
,
1833 "Local variables of current stack frame.");
1834 add_info ("args", args_info
,
1835 "Argument variables of current stack frame.");
1837 add_com ("l", class_info
, args_plus_locals_info
,
1838 "Argument and local variables of current stack frame.");
1841 add_com ("func", class_stack
, func_command
,
1842 "Select the stack frame that contains <func>.\nUsage: func <name>\n");
1844 add_info ("catch", catch_info
,
1845 "Exceptions that can be caught in the current stack frame.");
1848 add_cmd ("backtrace-limit", class_stack
, set_backtrace_limit_command
,
1849 "Specify maximum number of frames for \"backtrace\" to print by default.",
1851 add_info ("backtrace-limit", backtrace_limit_info
,
1852 "The maximum number of frames for \"backtrace\" to print by default.");