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", get_frame_pc (fi
));
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
= DEPRECATED_SYMBOL_NAME (msymbol
);
360 funlang
= SYMBOL_LANGUAGE (msymbol
);
364 /* I'd like to use SYMBOL_PRINT_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
= DEPRECATED_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_PRINT_NAME (func
);
391 struct minimal_symbol
*msymbol
= lookup_minimal_symbol_by_pc (frame_address_in_block (fi
));
394 funname
= DEPRECATED_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 /* Print verbosely the selected frame or the frame at address ADDR.
604 This means absolutely all information in the frame is printed. */
607 frame_info (char *addr_exp
, int from_tty
)
609 struct frame_info
*fi
;
610 struct symtab_and_line sal
;
613 struct frame_info
*calling_frame_info
;
614 int i
, count
, numregs
;
616 enum language funlang
= language_unknown
;
617 const char *pc_regname
;
619 if (!target_has_stack
)
622 /* Name of the value returned by get_frame_pc(). Per comments, "pc"
623 is not a good name. */
625 /* OK, this is weird. The PC_REGNUM hardware register's value can
626 easily not match that of the internal value returned by
628 pc_regname
= REGISTER_NAME (PC_REGNUM
);
630 /* But then, this is weird to. Even without PC_REGNUM, an
631 architectures will often have a hardware register called "pc",
632 and that register's value, again, can easily not match
636 fi
= parse_frame_specification (addr_exp
);
638 error ("Invalid frame specified.");
640 find_frame_sal (fi
, &sal
);
641 func
= get_frame_function (fi
);
642 /* FIXME: cagney/2002-11-28: Why bother? Won't sal.symtab contain
644 s
= find_pc_symtab (get_frame_pc (fi
));
647 /* I'd like to use SYMBOL_PRINT_NAME() here, to display
648 * the demangled name that we already have stored in
649 * the symbol table, but we stored a version with
650 * DMGL_PARAMS turned on, and here we don't want
651 * to display parameters. So call the demangler again,
652 * with DMGL_ANSI only. RT
653 * (Yes, I know that printf_symbol_filtered() will
654 * again try to demangle the name on the fly, but
655 * the issue is that if cplus_demangle() fails here,
656 * it'll fail there too. So we want to catch the failure
657 * ("demangled==NULL" case below) here, while we still
658 * have our hands on the function symbol.)
661 funname
= DEPRECATED_SYMBOL_NAME (func
);
662 funlang
= SYMBOL_LANGUAGE (func
);
663 if (funlang
== language_cplus
)
665 demangled
= cplus_demangle (funname
, DMGL_ANSI
);
666 /* If the demangler fails, try the demangled name
667 * from the symbol table. This'll have parameters,
668 * but that's preferable to diplaying a mangled name.
670 if (demangled
== NULL
)
671 funname
= SYMBOL_PRINT_NAME (func
);
676 register struct minimal_symbol
*msymbol
= lookup_minimal_symbol_by_pc (get_frame_pc (fi
));
679 funname
= DEPRECATED_SYMBOL_NAME (msymbol
);
680 funlang
= SYMBOL_LANGUAGE (msymbol
);
683 calling_frame_info
= get_prev_frame (fi
);
685 if (!addr_exp
&& frame_relative_level (deprecated_selected_frame
) >= 0)
687 printf_filtered ("Stack level %d, frame at ",
688 frame_relative_level (deprecated_selected_frame
));
689 print_address_numeric (get_frame_base (fi
), 1, gdb_stdout
);
690 printf_filtered (":\n");
694 printf_filtered ("Stack frame at ");
695 print_address_numeric (get_frame_base (fi
), 1, gdb_stdout
);
696 printf_filtered (":\n");
698 printf_filtered (" %s = ", pc_regname
);
699 print_address_numeric (get_frame_pc (fi
), 1, gdb_stdout
);
704 printf_filtered (" in ");
705 fprintf_symbol_filtered (gdb_stdout
, funname
, funlang
,
706 DMGL_ANSI
| DMGL_PARAMS
);
710 printf_filtered (" (%s:%d)", sal
.symtab
->filename
, sal
.line
);
711 puts_filtered ("; ");
713 printf_filtered ("saved %s ", pc_regname
);
714 print_address_numeric (frame_pc_unwind (fi
), 1, gdb_stdout
);
715 printf_filtered ("\n");
719 frameless
= FRAMELESS_FUNCTION_INVOCATION (fi
);
721 printf_filtered (" (FRAMELESS),");
724 if (calling_frame_info
)
726 printf_filtered (" called by frame at ");
727 print_address_numeric (get_frame_base (calling_frame_info
),
730 if (get_next_frame (fi
) && calling_frame_info
)
733 if (get_next_frame (fi
))
735 printf_filtered (" caller of frame at ");
736 print_address_numeric (get_frame_base (get_next_frame (fi
)), 1,
739 if (get_next_frame (fi
) || calling_frame_info
)
740 puts_filtered ("\n");
742 printf_filtered (" source language %s.\n",
743 language_str (s
->language
));
745 #ifdef PRINT_EXTRA_FRAME_INFO
746 PRINT_EXTRA_FRAME_INFO (fi
);
750 /* Address of the argument list for this frame, or 0. */
751 CORE_ADDR arg_list
= get_frame_args_address (fi
);
752 /* Number of args for this frame, or -1 if unknown. */
756 printf_filtered (" Arglist at unknown address.\n");
759 printf_filtered (" Arglist at ");
760 print_address_numeric (arg_list
, 1, gdb_stdout
);
761 printf_filtered (",");
763 numargs
= FRAME_NUM_ARGS (fi
);
765 puts_filtered (" args: ");
766 else if (numargs
== 0)
767 puts_filtered (" no args.");
768 else if (numargs
== 1)
769 puts_filtered (" 1 arg: ");
771 printf_filtered (" %d args: ", numargs
);
772 print_frame_args (func
, fi
, numargs
, gdb_stdout
);
773 puts_filtered ("\n");
777 /* Address of the local variables for this frame, or 0. */
778 CORE_ADDR arg_list
= get_frame_locals_address (fi
);
781 printf_filtered (" Locals at unknown address,");
784 printf_filtered (" Locals at ");
785 print_address_numeric (arg_list
, 1, gdb_stdout
);
786 printf_filtered (",");
790 if (DEPRECATED_FRAME_INIT_SAVED_REGS_P ()
791 && get_frame_saved_regs (fi
) == NULL
)
792 DEPRECATED_FRAME_INIT_SAVED_REGS (fi
);
793 /* Print as much information as possible on the location of all the
804 /* The sp is special; what's displayed isn't the save address, but
805 the value of the previous frame's sp. This is a legacy thing,
806 at one stage the frame cached the previous frame's SP instead
807 of its address, hence it was easiest to just display the cached
811 /* Find out the location of the saved stack pointer with out
812 actually evaluating it. */
813 frame_register_unwind (fi
, SP_REGNUM
, &optimized
, &lval
, &addr
,
815 if (!optimized
&& lval
== not_lval
)
817 char value
[MAX_REGISTER_SIZE
];
819 frame_register_unwind (fi
, SP_REGNUM
, &optimized
, &lval
, &addr
,
821 sp
= extract_address (value
, REGISTER_RAW_SIZE (SP_REGNUM
));
822 printf_filtered (" Previous frame's sp is ");
823 print_address_numeric (sp
, 1, gdb_stdout
);
824 printf_filtered ("\n");
827 else if (!optimized
&& lval
== lval_memory
)
829 printf_filtered (" Previous frame's sp at ");
830 print_address_numeric (addr
, 1, gdb_stdout
);
831 printf_filtered ("\n");
834 else if (!optimized
&& lval
== lval_register
)
836 printf_filtered (" Previous frame's sp in %s\n",
837 REGISTER_NAME (realnum
));
840 /* else keep quiet. */
844 numregs
= NUM_REGS
+ NUM_PSEUDO_REGS
;
845 for (i
= 0; i
< numregs
; i
++)
848 /* Find out the location of the saved register without
849 fetching the corresponding value. */
850 frame_register_unwind (fi
, i
, &optimized
, &lval
, &addr
, &realnum
,
852 /* For moment, only display registers that were saved on the
854 if (!optimized
&& lval
== lval_memory
)
857 puts_filtered (" Saved registers:\n ");
861 printf_filtered (" %s at ", REGISTER_NAME (i
));
862 print_address_numeric (addr
, 1, gdb_stdout
);
866 if (count
|| need_nl
)
867 puts_filtered ("\n");
872 /* Set a limit on the number of frames printed by default in a
875 static int backtrace_limit
;
878 set_backtrace_limit_command (char *count_exp
, int from_tty
)
880 int count
= parse_and_eval_long (count_exp
);
883 error ("Negative argument not meaningful as backtrace limit.");
885 backtrace_limit
= count
;
889 backtrace_limit_info (char *arg
, int from_tty
)
892 error ("\"Info backtrace-limit\" takes no arguments.");
894 printf_unfiltered ("Backtrace limit: %d.\n", backtrace_limit
);
898 /* Print briefly all stack frames or just the innermost COUNT frames. */
900 static void backtrace_command_1 (char *count_exp
, int show_locals
,
903 backtrace_command_1 (char *count_exp
, int show_locals
, int from_tty
)
905 struct frame_info
*fi
;
908 register struct frame_info
*trailing
;
909 register int trailing_level
;
911 if (!target_has_stack
)
914 /* The following code must do two things. First, it must
915 set the variable TRAILING to the frame from which we should start
916 printing. Second, it must set the variable count to the number
917 of frames which we should print, or -1 if all of them. */
918 trailing
= get_current_frame ();
920 /* The target can be in a state where there is no valid frames
921 (e.g., just connected). */
922 if (trailing
== NULL
)
928 count
= parse_and_eval_long (count_exp
);
931 struct frame_info
*current
;
936 while (current
&& count
--)
939 current
= get_prev_frame (current
);
942 /* Will stop when CURRENT reaches the top of the stack. TRAILING
943 will be COUNT below it. */
947 trailing
= get_prev_frame (trailing
);
948 current
= get_prev_frame (current
);
960 struct partial_symtab
*ps
;
962 /* Read in symbols for all of the frames. Need to do this in
963 a separate pass so that "Reading in symbols for xxx" messages
964 don't screw up the appearance of the backtrace. Also
965 if people have strong opinions against reading symbols for
966 backtrace this may have to be an option. */
970 fi
= get_prev_frame (fi
))
973 ps
= find_pc_psymtab (frame_address_in_block (fi
));
975 PSYMTAB_TO_SYMTAB (ps
); /* Force syms to come in */
979 for (i
= 0, fi
= trailing
;
981 i
++, fi
= get_prev_frame (fi
))
985 /* Don't use print_stack_frame; if an error() occurs it probably
986 means further attempts to backtrace would fail (on the other
987 hand, perhaps the code does or could be fixed to make sure
988 the frame->prev field gets set to NULL in that case). */
989 print_frame_info (fi
, trailing_level
+ i
, 0, 1);
991 print_frame_local_vars (fi
, 1, gdb_stdout
);
994 /* If we've stopped before the end, mention that. */
996 printf_filtered ("(More stack frames follow...)\n");
1000 backtrace_command (char *arg
, int from_tty
)
1002 struct cleanup
*old_chain
= (struct cleanup
*) NULL
;
1003 char **argv
= (char **) NULL
;
1004 int argIndicatingFullTrace
= (-1), totArgLen
= 0, argc
= 0;
1007 if (arg
!= (char *) NULL
)
1011 argv
= buildargv (arg
);
1012 old_chain
= make_cleanup_freeargv (argv
);
1014 for (i
= 0; (argv
[i
] != (char *) NULL
); i
++)
1018 for (j
= 0; (j
< strlen (argv
[i
])); j
++)
1019 argv
[i
][j
] = tolower (argv
[i
][j
]);
1021 if (argIndicatingFullTrace
< 0 && subset_compare (argv
[i
], "full"))
1022 argIndicatingFullTrace
= argc
;
1026 totArgLen
+= strlen (argv
[i
]);
1030 if (argIndicatingFullTrace
>= 0)
1034 argPtr
= (char *) xmalloc (totArgLen
+ 1);
1039 memset (argPtr
, 0, totArgLen
+ 1);
1040 for (i
= 0; (i
< (argc
+ 1)); i
++)
1042 if (i
!= argIndicatingFullTrace
)
1044 strcat (argPtr
, argv
[i
]);
1045 strcat (argPtr
, " ");
1051 argPtr
= (char *) NULL
;
1055 backtrace_command_1 (argPtr
, (argIndicatingFullTrace
>= 0), from_tty
);
1057 if (argIndicatingFullTrace
>= 0 && totArgLen
> 0)
1061 do_cleanups (old_chain
);
1064 static void backtrace_full_command (char *arg
, int from_tty
);
1066 backtrace_full_command (char *arg
, int from_tty
)
1068 backtrace_command_1 (arg
, 1, from_tty
);
1072 /* Print the local variables of a block B active in FRAME.
1073 Return 1 if any variables were printed; 0 otherwise. */
1076 print_block_frame_locals (struct block
*b
, register struct frame_info
*fi
,
1077 int num_tabs
, register struct ui_file
*stream
)
1080 register struct symbol
*sym
;
1081 register int values_printed
= 0;
1083 ALL_BLOCK_SYMBOLS (b
, i
, sym
)
1085 switch (SYMBOL_CLASS (sym
))
1093 for (j
= 0; j
< num_tabs
; j
++)
1094 fputs_filtered ("\t", stream
);
1095 fputs_filtered (SYMBOL_PRINT_NAME (sym
), stream
);
1096 fputs_filtered (" = ", stream
);
1097 print_variable_value (sym
, fi
, stream
);
1098 fprintf_filtered (stream
, "\n");
1102 /* Ignore symbols which are not locals. */
1106 return values_printed
;
1109 /* Same, but print labels. */
1112 print_block_frame_labels (struct block
*b
, int *have_default
,
1113 register struct ui_file
*stream
)
1116 register struct symbol
*sym
;
1117 register int values_printed
= 0;
1119 ALL_BLOCK_SYMBOLS (b
, i
, sym
)
1121 if (STREQ (DEPRECATED_SYMBOL_NAME (sym
), "default"))
1127 if (SYMBOL_CLASS (sym
) == LOC_LABEL
)
1129 struct symtab_and_line sal
;
1130 sal
= find_pc_line (SYMBOL_VALUE_ADDRESS (sym
), 0);
1132 fputs_filtered (SYMBOL_PRINT_NAME (sym
), stream
);
1135 fprintf_filtered (stream
, " ");
1136 print_address_numeric (SYMBOL_VALUE_ADDRESS (sym
), 1, stream
);
1138 fprintf_filtered (stream
, " in file %s, line %d\n",
1139 sal
.symtab
->filename
, sal
.line
);
1142 return values_printed
;
1145 /* Print on STREAM all the local variables in frame FRAME,
1146 including all the blocks active in that frame
1149 Returns 1 if the job was done,
1150 or 0 if nothing was printed because we have no info
1151 on the function running in FRAME. */
1154 print_frame_local_vars (register struct frame_info
*fi
, register int num_tabs
,
1155 register struct ui_file
*stream
)
1157 register struct block
*block
= get_frame_block (fi
, 0);
1158 register int values_printed
= 0;
1162 fprintf_filtered (stream
, "No symbol table info available.\n");
1168 if (print_block_frame_locals (block
, fi
, num_tabs
, stream
))
1170 /* After handling the function's top-level block, stop.
1171 Don't continue to its superblock, the block of
1172 per-file symbols. */
1173 if (BLOCK_FUNCTION (block
))
1175 block
= BLOCK_SUPERBLOCK (block
);
1178 if (!values_printed
)
1180 fprintf_filtered (stream
, "No locals.\n");
1184 /* Same, but print labels. */
1187 print_frame_label_vars (register struct frame_info
*fi
, int this_level_only
,
1188 register struct ui_file
*stream
)
1190 register struct blockvector
*bl
;
1191 register struct block
*block
= get_frame_block (fi
, 0);
1192 register int values_printed
= 0;
1193 int index
, have_default
= 0;
1194 char *blocks_printed
;
1195 CORE_ADDR pc
= get_frame_pc (fi
);
1199 fprintf_filtered (stream
, "No symbol table info available.\n");
1203 bl
= blockvector_for_pc (BLOCK_END (block
) - 4, &index
);
1204 blocks_printed
= (char *) alloca (BLOCKVECTOR_NBLOCKS (bl
) * sizeof (char));
1205 memset (blocks_printed
, 0, BLOCKVECTOR_NBLOCKS (bl
) * sizeof (char));
1209 CORE_ADDR end
= BLOCK_END (block
) - 4;
1212 if (bl
!= blockvector_for_pc (end
, &index
))
1213 error ("blockvector blotch");
1214 if (BLOCKVECTOR_BLOCK (bl
, index
) != block
)
1215 error ("blockvector botch");
1216 last_index
= BLOCKVECTOR_NBLOCKS (bl
);
1219 /* Don't print out blocks that have gone by. */
1220 while (index
< last_index
1221 && BLOCK_END (BLOCKVECTOR_BLOCK (bl
, index
)) < pc
)
1224 while (index
< last_index
1225 && BLOCK_END (BLOCKVECTOR_BLOCK (bl
, index
)) < end
)
1227 if (blocks_printed
[index
] == 0)
1229 if (print_block_frame_labels (BLOCKVECTOR_BLOCK (bl
, index
), &have_default
, stream
))
1231 blocks_printed
[index
] = 1;
1237 if (values_printed
&& this_level_only
)
1240 /* After handling the function's top-level block, stop.
1241 Don't continue to its superblock, the block of
1242 per-file symbols. */
1243 if (BLOCK_FUNCTION (block
))
1245 block
= BLOCK_SUPERBLOCK (block
);
1248 if (!values_printed
&& !this_level_only
)
1250 fprintf_filtered (stream
, "No catches.\n");
1256 locals_info (char *args
, int from_tty
)
1258 if (!deprecated_selected_frame
)
1259 error ("No frame selected.");
1260 print_frame_local_vars (deprecated_selected_frame
, 0, gdb_stdout
);
1264 catch_info (char *ignore
, int from_tty
)
1266 struct symtab_and_line
*sal
;
1268 /* Check for target support for exception handling */
1269 sal
= target_enable_exception_callback (EX_EVENT_CATCH
, 1);
1272 /* Currently not handling this */
1273 /* Ideally, here we should interact with the C++ runtime
1274 system to find the list of active handlers, etc. */
1275 fprintf_filtered (gdb_stdout
, "Info catch not supported with this target/compiler combination.\n");
1277 if (!deprecated_selected_frame
)
1278 error ("No frame selected.");
1283 /* Assume g++ compiled code -- old v 4.16 behaviour */
1284 if (!deprecated_selected_frame
)
1285 error ("No frame selected.");
1287 print_frame_label_vars (deprecated_selected_frame
, 0, gdb_stdout
);
1292 print_frame_arg_vars (register struct frame_info
*fi
,
1293 register struct ui_file
*stream
)
1295 struct symbol
*func
= get_frame_function (fi
);
1296 register struct block
*b
;
1298 register struct symbol
*sym
, *sym2
;
1299 register int values_printed
= 0;
1303 fprintf_filtered (stream
, "No symbol table info available.\n");
1307 b
= SYMBOL_BLOCK_VALUE (func
);
1308 ALL_BLOCK_SYMBOLS (b
, i
, sym
)
1310 switch (SYMBOL_CLASS (sym
))
1316 case LOC_REGPARM_ADDR
:
1317 case LOC_BASEREG_ARG
:
1318 case LOC_COMPUTED_ARG
:
1320 fputs_filtered (SYMBOL_PRINT_NAME (sym
), stream
);
1321 fputs_filtered (" = ", stream
);
1323 /* We have to look up the symbol because arguments can have
1324 two entries (one a parameter, one a local) and the one we
1325 want is the local, which lookup_symbol will find for us.
1326 This includes gcc1 (not gcc2) on the sparc when passing a
1327 small structure and gcc2 when the argument type is float
1328 and it is passed as a double and converted to float by
1329 the prologue (in the latter case the type of the LOC_ARG
1330 symbol is double and the type of the LOC_LOCAL symbol is
1331 float). There are also LOC_ARG/LOC_REGISTER pairs which
1332 are not combined in symbol-reading. */
1334 sym2
= lookup_symbol (DEPRECATED_SYMBOL_NAME (sym
),
1335 b
, VAR_NAMESPACE
, (int *) NULL
, (struct symtab
**) NULL
);
1336 print_variable_value (sym2
, fi
, stream
);
1337 fprintf_filtered (stream
, "\n");
1341 /* Don't worry about things which aren't arguments. */
1345 if (!values_printed
)
1347 fprintf_filtered (stream
, "No arguments.\n");
1352 args_info (char *ignore
, int from_tty
)
1354 if (!deprecated_selected_frame
)
1355 error ("No frame selected.");
1356 print_frame_arg_vars (deprecated_selected_frame
, gdb_stdout
);
1361 args_plus_locals_info (char *ignore
, int from_tty
)
1363 args_info (ignore
, from_tty
);
1364 locals_info (ignore
, from_tty
);
1368 /* Select frame FI. Also print the stack frame and show the source if
1369 this is the tui version. */
1371 select_and_print_frame (struct frame_info
*fi
)
1376 print_stack_frame (fi
, frame_relative_level (fi
), 1);
1380 /* Return the symbol-block in which the selected frame is executing.
1381 Can return zero under various legitimate circumstances.
1383 If ADDR_IN_BLOCK is non-zero, set *ADDR_IN_BLOCK to the relevant
1384 code address within the block returned. We use this to decide
1385 which macros are in scope. */
1388 get_selected_block (CORE_ADDR
*addr_in_block
)
1390 if (!target_has_stack
)
1393 /* NOTE: cagney/2002-11-28: Why go to all this effort to not create
1394 a selected/current frame? Perhaphs this function is called,
1395 indirectly, by WFI in "infrun.c" where avoiding the creation of
1396 an inner most frame is very important (it slows down single
1397 step). I suspect, though that this was true in the deep dark
1398 past but is no longer the case. A mindless look at all the
1399 callers tends to support this theory. I think we should be able
1400 to assume that there is always a selcted frame. */
1401 /* gdb_assert (deprecated_selected_frame != NULL); So, do you feel
1403 if (!deprecated_selected_frame
)
1405 CORE_ADDR pc
= read_pc ();
1406 if (addr_in_block
!= NULL
)
1407 *addr_in_block
= pc
;
1408 return block_for_pc (pc
);
1410 return get_frame_block (deprecated_selected_frame
, addr_in_block
);
1413 /* Find a frame a certain number of levels away from FRAME.
1414 LEVEL_OFFSET_PTR points to an int containing the number of levels.
1415 Positive means go to earlier frames (up); negative, the reverse.
1416 The int that contains the number of levels is counted toward
1417 zero as the frames for those levels are found.
1418 If the top or bottom frame is reached, that frame is returned,
1419 but the final value of *LEVEL_OFFSET_PTR is nonzero and indicates
1420 how much farther the original request asked to go. */
1423 find_relative_frame (register struct frame_info
*frame
,
1424 register int *level_offset_ptr
)
1426 register struct frame_info
*prev
;
1427 register struct frame_info
*frame1
;
1429 /* Going up is simple: just do get_prev_frame enough times
1430 or until initial frame is reached. */
1431 while (*level_offset_ptr
> 0)
1433 prev
= get_prev_frame (frame
);
1436 (*level_offset_ptr
)--;
1439 /* Going down is just as simple. */
1440 if (*level_offset_ptr
< 0)
1442 while (*level_offset_ptr
< 0)
1444 frame1
= get_next_frame (frame
);
1448 (*level_offset_ptr
)++;
1454 /* The "select_frame" command. With no arg, NOP.
1455 With arg LEVEL_EXP, select the frame at level LEVEL if it is a
1456 valid level. Otherwise, treat level_exp as an address expression
1457 and select it. See parse_frame_specification for more info on proper
1458 frame expressions. */
1462 select_frame_command_wrapper (char *level_exp
, int from_tty
)
1464 select_frame_command (level_exp
, from_tty
);
1468 select_frame_command (char *level_exp
, int from_tty
)
1470 struct frame_info
*frame
;
1471 int level
= frame_relative_level (deprecated_selected_frame
);
1473 if (!target_has_stack
)
1474 error ("No stack.");
1476 frame
= parse_frame_specification (level_exp
);
1478 select_frame (frame
);
1479 if (level
!= frame_relative_level (deprecated_selected_frame
))
1480 selected_frame_level_changed_event (frame_relative_level (deprecated_selected_frame
));
1483 /* The "frame" command. With no arg, print selected frame briefly.
1484 With arg, behaves like select_frame and then prints the selected
1488 frame_command (char *level_exp
, int from_tty
)
1490 select_frame_command (level_exp
, from_tty
);
1491 print_stack_frame (deprecated_selected_frame
,
1492 frame_relative_level (deprecated_selected_frame
), 1);
1495 /* The XDB Compatibility command to print the current frame. */
1498 current_frame_command (char *level_exp
, int from_tty
)
1500 if (target_has_stack
== 0 || deprecated_selected_frame
== 0)
1501 error ("No stack.");
1502 print_stack_frame (deprecated_selected_frame
,
1503 frame_relative_level (deprecated_selected_frame
), 1);
1506 /* Select the frame up one or COUNT stack levels
1507 from the previously selected frame, and print it briefly. */
1511 up_silently_base (char *count_exp
)
1513 register struct frame_info
*fi
;
1514 int count
= 1, count1
;
1516 count
= parse_and_eval_long (count_exp
);
1519 if (target_has_stack
== 0 || deprecated_selected_frame
== 0)
1520 error ("No stack.");
1522 fi
= find_relative_frame (deprecated_selected_frame
, &count1
);
1523 if (count1
!= 0 && count_exp
== 0)
1524 error ("Initial frame selected; you cannot go up.");
1526 selected_frame_level_changed_event (frame_relative_level (deprecated_selected_frame
));
1530 up_silently_command (char *count_exp
, int from_tty
)
1532 up_silently_base (count_exp
);
1536 up_command (char *count_exp
, int from_tty
)
1538 up_silently_base (count_exp
);
1539 print_stack_frame (deprecated_selected_frame
,
1540 frame_relative_level (deprecated_selected_frame
), 1);
1543 /* Select the frame down one or COUNT stack levels
1544 from the previously selected frame, and print it briefly. */
1548 down_silently_base (char *count_exp
)
1550 register struct frame_info
*frame
;
1551 int count
= -1, count1
;
1553 count
= -parse_and_eval_long (count_exp
);
1556 if (target_has_stack
== 0 || deprecated_selected_frame
== 0)
1557 error ("No stack.");
1559 frame
= find_relative_frame (deprecated_selected_frame
, &count1
);
1560 if (count1
!= 0 && count_exp
== 0)
1563 /* We only do this if count_exp is not specified. That way "down"
1564 means to really go down (and let me know if that is
1565 impossible), but "down 9999" can be used to mean go all the way
1566 down without getting an error. */
1568 error ("Bottom (i.e., innermost) frame selected; you cannot go down.");
1571 select_frame (frame
);
1572 selected_frame_level_changed_event (frame_relative_level (deprecated_selected_frame
));
1577 down_silently_command (char *count_exp
, int from_tty
)
1579 down_silently_base (count_exp
);
1583 down_command (char *count_exp
, int from_tty
)
1585 down_silently_base (count_exp
);
1586 print_stack_frame (deprecated_selected_frame
,
1587 frame_relative_level (deprecated_selected_frame
), 1);
1591 return_command (char *retval_exp
, int from_tty
)
1593 struct symbol
*thisfun
;
1594 CORE_ADDR selected_frame_addr
;
1595 CORE_ADDR selected_frame_pc
;
1596 struct frame_info
*frame
;
1597 struct value
*return_value
= NULL
;
1599 if (deprecated_selected_frame
== NULL
)
1600 error ("No selected frame.");
1601 thisfun
= get_frame_function (deprecated_selected_frame
);
1602 selected_frame_addr
= get_frame_base (deprecated_selected_frame
);
1603 selected_frame_pc
= get_frame_pc (deprecated_selected_frame
);
1605 /* Compute the return value (if any -- possibly getting errors here). */
1609 struct type
*return_type
= NULL
;
1611 return_value
= parse_and_eval (retval_exp
);
1613 /* Cast return value to the return type of the function. */
1614 if (thisfun
!= NULL
)
1615 return_type
= TYPE_TARGET_TYPE (SYMBOL_TYPE (thisfun
));
1616 if (return_type
== NULL
)
1617 return_type
= builtin_type_int
;
1618 return_value
= value_cast (return_type
, return_value
);
1620 /* Make sure we have fully evaluated it, since
1621 it might live in the stack frame we're about to pop. */
1622 if (VALUE_LAZY (return_value
))
1623 value_fetch_lazy (return_value
);
1626 /* If interactive, require confirmation. */
1632 if (!query ("Make %s return now? ", SYMBOL_PRINT_NAME (thisfun
)))
1634 error ("Not confirmed.");
1638 else if (!query ("Make selected stack frame return now? "))
1639 error ("Not confirmed.");
1642 /* FIXME: cagney/2003-01-18: Rather than pop each frame in turn,
1643 this code should just go straight to the relevant frame and pop
1646 /* Do the real work. Pop until the specified frame is current. We
1647 use this method because the deprecated_selected_frame is not
1648 valid after a frame_pop(). The pc comparison makes this work
1649 even if the selected frame shares its fp with another frame. */
1651 /* FIXME: cagney/32003-03-12: This code should use frame_id_eq().
1652 Unfortunatly, that function doesn't yet include the PC in any
1653 frame ID comparison. */
1655 while (selected_frame_addr
!= get_frame_base (frame
= get_current_frame ())
1656 || selected_frame_pc
!= get_frame_pc (frame
))
1657 frame_pop (get_current_frame ());
1659 /* Then pop that frame. */
1661 frame_pop (get_current_frame ());
1663 /* Compute the return value (if any) and store in the place
1664 for return values. */
1667 set_return_value (return_value
);
1669 /* If we are at the end of a call dummy now, pop the dummy frame too. */
1671 /* FIXME: cagney/2003-01-18: This is silly. Instead of popping all
1672 the frames except the dummy, and then, as an afterthought,
1673 popping the dummy frame, this code should just pop through to the
1676 if (CALL_DUMMY_HAS_COMPLETED (read_pc(), read_sp (),
1677 get_frame_base (get_current_frame ())))
1678 frame_pop (get_current_frame ());
1680 /* If interactive, print the frame that is now current. */
1683 frame_command ("0", 1);
1685 select_frame_command ("0", 0);
1688 /* Sets the scope to input function name, provided that the
1689 function is within the current stack frame */
1691 struct function_bounds
1693 CORE_ADDR low
, high
;
1696 static void func_command (char *arg
, int from_tty
);
1698 func_command (char *arg
, int from_tty
)
1700 struct frame_info
*fp
;
1702 struct symtabs_and_lines sals
;
1705 struct function_bounds
*func_bounds
= (struct function_bounds
*) NULL
;
1707 if (arg
!= (char *) NULL
)
1710 fp
= parse_frame_specification ("0");
1711 sals
= decode_line_spec (arg
, 1);
1712 func_bounds
= (struct function_bounds
*) xmalloc (
1713 sizeof (struct function_bounds
) * sals
.nelts
);
1714 for (i
= 0; (i
< sals
.nelts
&& !found
); i
++)
1716 if (sals
.sals
[i
].pc
== (CORE_ADDR
) 0 ||
1717 find_pc_partial_function (sals
.sals
[i
].pc
,
1719 &func_bounds
[i
].low
,
1720 &func_bounds
[i
].high
) == 0)
1722 func_bounds
[i
].low
=
1723 func_bounds
[i
].high
= (CORE_ADDR
) NULL
;
1729 for (i
= 0; (i
< sals
.nelts
&& !found
); i
++)
1730 found
= (get_frame_pc (fp
) >= func_bounds
[i
].low
&&
1731 get_frame_pc (fp
) < func_bounds
[i
].high
);
1735 fp
= find_relative_frame (fp
, &level
);
1738 while (!found
&& level
== 0);
1741 xfree (func_bounds
);
1744 printf_filtered ("'%s' not within current stack frame.\n", arg
);
1745 else if (fp
!= deprecated_selected_frame
)
1746 select_and_print_frame (fp
);
1749 /* Gets the language of the current frame. */
1752 get_frame_language (void)
1754 register struct symtab
*s
;
1755 enum language flang
; /* The language of the current frame */
1757 if (deprecated_selected_frame
)
1759 s
= find_pc_symtab (get_frame_pc (deprecated_selected_frame
));
1761 flang
= s
->language
;
1763 flang
= language_unknown
;
1766 flang
= language_unknown
;
1772 _initialize_stack (void)
1775 backtrace_limit
= 30;
1778 add_com ("return", class_stack
, return_command
,
1779 "Make selected stack frame return to its caller.\n\
1780 Control remains in the debugger, but when you continue\n\
1781 execution will resume in the frame above the one now selected.\n\
1782 If an argument is given, it is an expression for the value to return.");
1784 add_com ("up", class_stack
, up_command
,
1785 "Select and print stack frame that called this one.\n\
1786 An argument says how many frames up to go.");
1787 add_com ("up-silently", class_support
, up_silently_command
,
1788 "Same as the `up' command, but does not print anything.\n\
1789 This is useful in command scripts.");
1791 add_com ("down", class_stack
, down_command
,
1792 "Select and print stack frame called by this one.\n\
1793 An argument says how many frames down to go.");
1794 add_com_alias ("do", "down", class_stack
, 1);
1795 add_com_alias ("dow", "down", class_stack
, 1);
1796 add_com ("down-silently", class_support
, down_silently_command
,
1797 "Same as the `down' command, but does not print anything.\n\
1798 This is useful in command scripts.");
1800 add_com ("frame", class_stack
, frame_command
,
1801 "Select and print a stack frame.\n\
1802 With no argument, print the selected stack frame. (See also \"info frame\").\n\
1803 An argument specifies the frame to select.\n\
1804 It can be a stack frame number or the address of the frame.\n\
1805 With argument, nothing is printed if input is coming from\n\
1806 a command file or a user-defined command.");
1808 add_com_alias ("f", "frame", class_stack
, 1);
1812 add_com ("L", class_stack
, current_frame_command
,
1813 "Print the current stack frame.\n");
1814 add_com_alias ("V", "frame", class_stack
, 1);
1816 add_com ("select-frame", class_stack
, select_frame_command
,
1817 "Select a stack frame without printing anything.\n\
1818 An argument specifies the frame to select.\n\
1819 It can be a stack frame number or the address of the frame.\n");
1821 add_com ("backtrace", class_stack
, backtrace_command
,
1822 "Print backtrace of all stack frames, or innermost COUNT frames.\n\
1823 With a negative argument, print outermost -COUNT frames.\n\
1824 Use of the 'full' qualifier also prints the values of the local variables.\n");
1825 add_com_alias ("bt", "backtrace", class_stack
, 0);
1828 add_com_alias ("t", "backtrace", class_stack
, 0);
1829 add_com ("T", class_stack
, backtrace_full_command
,
1830 "Print backtrace of all stack frames, or innermost COUNT frames \n\
1831 and the values of the local variables.\n\
1832 With a negative argument, print outermost -COUNT frames.\n\
1833 Usage: T <count>\n");
1836 add_com_alias ("where", "backtrace", class_alias
, 0);
1837 add_info ("stack", backtrace_command
,
1838 "Backtrace of the stack, or innermost COUNT frames.");
1839 add_info_alias ("s", "stack", 1);
1840 add_info ("frame", frame_info
,
1841 "All about selected stack frame, or frame at ADDR.");
1842 add_info_alias ("f", "frame", 1);
1843 add_info ("locals", locals_info
,
1844 "Local variables of current stack frame.");
1845 add_info ("args", args_info
,
1846 "Argument variables of current stack frame.");
1848 add_com ("l", class_info
, args_plus_locals_info
,
1849 "Argument and local variables of current stack frame.");
1852 add_com ("func", class_stack
, func_command
,
1853 "Select the stack frame that contains <func>.\nUsage: func <name>\n");
1855 add_info ("catch", catch_info
,
1856 "Exceptions that can be caught in the current stack frame.");
1859 add_cmd ("backtrace-limit", class_stack
, set_backtrace_limit_command
,
1860 "Specify maximum number of frames for \"backtrace\" to print by default.",
1862 add_info ("backtrace-limit", backtrace_limit_info
,
1863 "The maximum number of frames for \"backtrace\" to print by default.");