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 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"
43 /* Prototypes for exported functions. */
45 void args_info (char *, int);
47 void locals_info (char *, int);
49 void (*selected_frame_level_changed_hook
) (int);
51 void _initialize_stack (void);
53 void return_command (char *, int);
55 /* Prototypes for local functions. */
57 static void down_command (char *, int);
59 static void down_silently_base (char *);
61 static void down_silently_command (char *, int);
63 static void up_command (char *, int);
65 static void up_silently_base (char *);
67 static void up_silently_command (char *, int);
69 void frame_command (char *, int);
71 static void current_frame_command (char *, int);
73 static void select_frame_command (char *, int);
75 static void print_frame_arg_vars (struct frame_info
*, struct ui_file
*);
77 static void catch_info (char *, int);
79 static void args_plus_locals_info (char *, int);
81 static void print_frame_label_vars (struct frame_info
*, int,
84 static void print_frame_local_vars (struct frame_info
*, int,
87 static int print_block_frame_labels (struct block
*, int *,
90 static int print_block_frame_locals (struct block
*,
95 static void print_frame (struct frame_info
*fi
,
99 struct symtab_and_line sal
);
101 static void print_frame_info_base (struct frame_info
*, int, int, int);
103 static void print_stack_frame_base (struct frame_info
*, int, int);
105 static void backtrace_command (char *, int);
107 struct frame_info
*parse_frame_specification (char *);
109 static void frame_info (char *, int);
111 extern int addressprint
; /* Print addresses, or stay symbolic only? */
113 /* The "selected" stack frame is used by default for local and arg access.
114 May be zero, for no selected frame. */
116 struct frame_info
*selected_frame
;
118 /* Zero means do things normally; we are interacting directly with the
119 user. One means print the full filename and linenumber when a
120 frame is printed, and do so in a format emacs18/emacs19.22 can
121 parse. Two means print similar annotations, but in many more
122 cases and in a slightly different syntax. */
124 int annotation_level
= 0;
127 struct print_stack_frame_args
129 struct frame_info
*fi
;
135 static int print_stack_frame_base_stub (char *);
137 /* Show and print the frame arguments.
138 Pass the args the way catch_errors wants them. */
139 static int show_and_print_stack_frame_stub (void *args
);
141 show_and_print_stack_frame_stub (void *args
)
143 struct print_stack_frame_args
*p
= (struct print_stack_frame_args
*) args
;
145 print_frame_info (p
->fi
, p
->level
, p
->source
, p
->args
);
150 /* Show or print the frame arguments.
151 Pass the args the way catch_errors wants them. */
152 static int print_stack_frame_stub (void *args
);
154 print_stack_frame_stub (void *args
)
156 struct print_stack_frame_args
*p
= (struct print_stack_frame_args
*) args
;
158 print_frame_info_base (p
->fi
, p
->level
, p
->source
, p
->args
);
162 /* Print a stack frame briefly. FRAME_INFI should be the frame info
163 and LEVEL should be its level in the stack (or -1 for level not
166 /* Pass the args the way catch_errors wants them. */
168 print_stack_frame_base_stub (char *args
)
170 struct print_stack_frame_args
*p
= (struct print_stack_frame_args
*) args
;
172 print_frame_info_base (p
->fi
, p
->level
, p
->source
, p
->args
);
176 /* print the frame arguments to the terminal.
177 Pass the args the way catch_errors wants them. */
178 static int print_only_stack_frame_stub (void *);
180 print_only_stack_frame_stub (void *args
)
182 struct print_stack_frame_args
*p
= (struct print_stack_frame_args
*) args
;
184 print_frame_info_base (p
->fi
, p
->level
, p
->source
, p
->args
);
188 /* Print a stack frame briefly. FRAME_INFI should be the frame info
189 and LEVEL should be its level in the stack (or -1 for level not defined).
190 This prints the level, the function executing, the arguments,
191 and the file name and line number.
192 If the pc is not at the beginning of the source line,
193 the actual pc is printed at the beginning.
195 If SOURCE is 1, print the source line as well.
196 If SOURCE is -1, print ONLY the source line. */
199 print_stack_frame_base (struct frame_info
*fi
, int level
, int source
)
201 struct print_stack_frame_args args
;
205 args
.source
= source
;
208 catch_errors (print_stack_frame_stub
, &args
, "", RETURN_MASK_ALL
);
211 /* Show and print a stack frame briefly. FRAME_INFI should be the frame info
212 and LEVEL should be its level in the stack (or -1 for level not defined).
213 This prints the level, the function executing, the arguments,
214 and the file name and line number.
215 If the pc is not at the beginning of the source line,
216 the actual pc is printed at the beginning.
218 If SOURCE is 1, print the source line as well.
219 If SOURCE is -1, print ONLY the source line. */
222 show_and_print_stack_frame (struct frame_info
*fi
, int level
, int source
)
224 struct print_stack_frame_args args
;
228 args
.source
= source
;
231 catch_errors (show_and_print_stack_frame_stub
, &args
, "", RETURN_MASK_ALL
);
235 /* Show or print a stack frame briefly. FRAME_INFI should be the frame info
236 and LEVEL should be its level in the stack (or -1 for level not defined).
237 This prints the level, the function executing, the arguments,
238 and the file name and line number.
239 If the pc is not at the beginning of the source line,
240 the actual pc is printed at the beginning.
242 If SOURCE is 1, print the source line as well.
243 If SOURCE is -1, print ONLY the source line. */
246 print_stack_frame (struct frame_info
*fi
, int level
, int source
)
248 struct print_stack_frame_args args
;
252 args
.source
= source
;
255 catch_errors (print_stack_frame_stub
, (char *) &args
, "", RETURN_MASK_ALL
);
258 /* Print a stack frame briefly. FRAME_INFI should be the frame info
259 and LEVEL should be its level in the stack (or -1 for level not defined).
260 This prints the level, the function executing, the arguments,
261 and the file name and line number.
262 If the pc is not at the beginning of the source line,
263 the actual pc is printed at the beginning.
265 If SOURCE is 1, print the source line as well.
266 If SOURCE is -1, print ONLY the source line. */
269 print_only_stack_frame (struct frame_info
*fi
, int level
, int source
)
271 struct print_stack_frame_args args
;
275 args
.source
= source
;
278 catch_errors (print_only_stack_frame_stub
, &args
, "", RETURN_MASK_ALL
);
281 struct print_args_args
284 struct frame_info
*fi
;
285 struct ui_file
*stream
;
288 static int print_args_stub (PTR
);
290 /* Pass the args the way catch_errors wants them. */
293 print_args_stub (PTR args
)
296 struct print_args_args
*p
= (struct print_args_args
*) args
;
298 numargs
= FRAME_NUM_ARGS (p
->fi
);
299 print_frame_args (p
->func
, p
->fi
, numargs
, p
->stream
);
303 /* Print information about a frame for frame "fi" at level "level".
304 Used in "where" output, also used to emit breakpoint or step
306 LEVEL is the level of the frame, or -1 if it is the
307 innermost frame but we don't want to print the level.
308 The meaning of the SOURCE argument is:
309 SRC_LINE: Print only source line
310 LOCATION: Print only location
311 LOC_AND_SRC: Print location and source line. */
314 print_frame_info_base (struct frame_info
*fi
, int level
, int source
, int args
)
316 struct symtab_and_line sal
;
321 char buf
[MAX_REGISTER_RAW_SIZE
];
324 /* On the 68k, this spends too much time in m68k_find_saved_regs. */
326 /* Get the value of SP_REGNUM relative to the frame. */
327 get_saved_register (buf
, (int *) NULL
, (CORE_ADDR
*) NULL
,
328 FRAME_INFO_ID (fi
), SP_REGNUM
, (enum lval_type
*) NULL
);
329 sp
= extract_address (buf
, REGISTER_RAW_SIZE (SP_REGNUM
));
331 /* This is not a perfect test, because if a function alloca's some
332 memory, puts some code there, and then jumps into it, then the test
333 will succeed even though there is no call dummy. Probably best is
334 to check for a bp_call_dummy breakpoint. */
335 if (PC_IN_CALL_DUMMY (fi
->pc
, sp
, fi
->frame
))
337 if (deprecated_frame_in_dummy (fi
))
340 annotate_frame_begin (level
== -1 ? 0 : level
, fi
->pc
);
342 /* Do this regardless of SOURCE because we don't have any source
343 to list for this frame. */
346 ui_out_text (uiout
, "#");
347 ui_out_field_fmt_int (uiout
, 2, ui_left
, "level", level
);
349 annotate_function_call ();
350 printf_filtered ("<function called from gdb>\n");
351 annotate_frame_end ();
354 if ((get_frame_type (fi
) == SIGTRAMP_FRAME
))
356 annotate_frame_begin (level
== -1 ? 0 : level
, fi
->pc
);
358 /* Do this regardless of SOURCE because we don't have any source
359 to list for this frame. */
362 ui_out_text (uiout
, "#");
363 ui_out_field_fmt_int (uiout
, 2, ui_left
, "level", level
);
365 annotate_signal_handler_caller ();
366 printf_filtered ("<signal handler called>\n");
367 annotate_frame_end ();
371 /* If fi is not the innermost frame, that normally means that fi->pc
372 points to *after* the call instruction, and we want to get the
373 line containing the call, never the next line. But if the next
374 frame is a SIGTRAMP_FRAME or a DUMMY_FRAME, then the next frame
375 was not entered as the result of a call, and we want to get the
376 line containing fi->pc. */
378 find_pc_line (fi
->pc
,
380 && !(get_frame_type (fi
->next
) == SIGTRAMP_FRAME
)
381 && !deprecated_frame_in_dummy (fi
->next
));
383 location_print
= (source
== LOCATION
384 || source
== LOC_AND_ADDRESS
385 || source
== SRC_AND_LOC
);
387 if (location_print
|| !sal
.symtab
)
388 print_frame (fi
, level
, source
, args
, sal
);
390 source_print
= (source
== SRC_LINE
|| source
== SRC_AND_LOC
);
393 set_current_source_symtab_and_line (&sal
);
395 if (source_print
&& sal
.symtab
)
397 struct symtab_and_line cursal
;
399 int mid_statement
= (source
== SRC_LINE
) && (fi
->pc
!= sal
.pc
);
401 if (annotation_level
)
402 done
= identify_source_line (sal
.symtab
, sal
.line
, mid_statement
,
406 if (print_frame_info_listing_hook
)
407 print_frame_info_listing_hook (sal
.symtab
, sal
.line
, sal
.line
+ 1, 0);
410 /* We used to do this earlier, but that is clearly
411 wrong. This function is used by many different
412 parts of gdb, including normal_stop in infrun.c,
413 which uses this to print out the current PC
414 when we stepi/nexti into the middle of a source
415 line. Only the command line really wants this
416 behavior. Other UIs probably would like the
417 ability to decide for themselves if it is desired. */
418 if (addressprint
&& mid_statement
)
420 ui_out_field_core_addr (uiout
, "addr", fi
->pc
);
421 ui_out_text (uiout
, "\t");
424 print_source_lines (sal
.symtab
, sal
.line
, sal
.line
+ 1, 0);
427 /* Make sure we have at least a default source file */
428 set_default_source_symtab_and_line ();
429 cursal
= get_current_source_symtab_and_line ();
430 cursal
.line
= max (sal
.line
- get_lines_to_list () / 2, 1);
431 set_current_source_symtab_and_line (&cursal
);
435 set_default_breakpoint (1, fi
->pc
, sal
.symtab
, sal
.line
);
437 annotate_frame_end ();
439 gdb_flush (gdb_stdout
);
443 print_frame (struct frame_info
*fi
,
447 struct symtab_and_line sal
)
450 register char *funname
= 0;
451 enum language funlang
= language_unknown
;
452 struct ui_stream
*stb
;
453 struct cleanup
*old_chain
;
454 struct cleanup
*list_chain
;
456 stb
= ui_out_stream_new (uiout
);
457 old_chain
= make_cleanup_ui_out_stream_delete (stb
);
459 func
= find_pc_function (frame_address_in_block (fi
));
462 /* In certain pathological cases, the symtabs give the wrong
463 function (when we are in the first function in a file which
464 is compiled without debugging symbols, the previous function
465 is compiled with debugging symbols, and the "foo.o" symbol
466 that is supposed to tell us where the file with debugging symbols
467 ends has been truncated by ar because it is longer than 15
468 characters). This also occurs if the user uses asm() to create
469 a function but not stabs for it (in a file compiled -g).
471 So look in the minimal symbol tables as well, and if it comes
472 up with a larger address for the function use that instead.
473 I don't think this can ever cause any problems; there shouldn't
474 be any minimal symbols in the middle of a function; if this is
475 ever changed many parts of GDB will need to be changed (and we'll
476 create a find_pc_minimal_function or some such). */
478 struct minimal_symbol
*msymbol
= lookup_minimal_symbol_by_pc (frame_address_in_block (fi
));
480 && (SYMBOL_VALUE_ADDRESS (msymbol
)
481 > BLOCK_START (SYMBOL_BLOCK_VALUE (func
))))
484 /* There is no particular reason to think the line number
485 information is wrong. Someone might have just put in
486 a label with asm() but left the line numbers alone. */
487 /* In this case we have no way of knowing the source file
488 and line number, so don't print them. */
491 /* We also don't know anything about the function besides
492 its address and name. */
494 funname
= SYMBOL_NAME (msymbol
);
495 funlang
= SYMBOL_LANGUAGE (msymbol
);
499 /* I'd like to use SYMBOL_SOURCE_NAME() here, to display the
500 demangled name that we already have stored in the symbol
501 table, but we stored a version with DMGL_PARAMS turned
502 on, and here we don't want to display parameters. So call
503 the demangler again, with DMGL_ANSI only. (Yes, I know
504 that printf_symbol_filtered() will again try to demangle
505 the name on the fly, but the issue is that if
506 cplus_demangle() fails here, it'll fail there too. So we
507 want to catch the failure ("demangled==NULL" case below)
508 here, while we still have our hands on the function
511 funname
= SYMBOL_NAME (func
);
512 funlang
= SYMBOL_LANGUAGE (func
);
513 if (funlang
== language_cplus
)
515 demangled
= cplus_demangle (funname
, DMGL_ANSI
);
516 if (demangled
== NULL
)
517 /* If the demangler fails, try the demangled name from
518 the symbol table. This'll have parameters, but
519 that's preferable to diplaying a mangled name. */
520 funname
= SYMBOL_SOURCE_NAME (func
);
526 struct minimal_symbol
*msymbol
= lookup_minimal_symbol_by_pc (frame_address_in_block (fi
));
529 funname
= SYMBOL_NAME (msymbol
);
530 funlang
= SYMBOL_LANGUAGE (msymbol
);
534 annotate_frame_begin (level
== -1 ? 0 : level
, fi
->pc
);
536 list_chain
= make_cleanup_ui_out_tuple_begin_end (uiout
, "frame");
540 ui_out_text (uiout
, "#");
541 ui_out_field_fmt_int (uiout
, 2, ui_left
, "level", level
);
544 if (fi
->pc
!= sal
.pc
|| !sal
.symtab
|| source
== LOC_AND_ADDRESS
)
546 annotate_frame_address ();
547 ui_out_field_core_addr (uiout
, "addr", fi
->pc
);
548 annotate_frame_address_end ();
549 ui_out_text (uiout
, " in ");
551 annotate_frame_function_name ();
552 fprintf_symbol_filtered (stb
->stream
, funname
? funname
: "??", funlang
,
554 ui_out_field_stream (uiout
, "func", stb
);
555 ui_out_wrap_hint (uiout
, " ");
556 annotate_frame_args ();
558 ui_out_text (uiout
, " (");
561 struct print_args_args args
;
562 struct cleanup
*args_list_chain
;
565 args
.stream
= gdb_stdout
;
566 args_list_chain
= make_cleanup_ui_out_list_begin_end (uiout
, "args");
567 catch_errors (print_args_stub
, &args
, "", RETURN_MASK_ALL
);
568 /* FIXME: args must be a list. If one argument is a string it will
569 have " that will not be properly escaped. */
570 /* Invoke ui_out_tuple_end. */
571 do_cleanups (args_list_chain
);
574 ui_out_text (uiout
, ")");
575 if (sal
.symtab
&& sal
.symtab
->filename
)
577 annotate_frame_source_begin ();
578 ui_out_wrap_hint (uiout
, " ");
579 ui_out_text (uiout
, " at ");
580 annotate_frame_source_file ();
581 ui_out_field_string (uiout
, "file", sal
.symtab
->filename
);
582 annotate_frame_source_file_end ();
583 ui_out_text (uiout
, ":");
584 annotate_frame_source_line ();
585 ui_out_field_int (uiout
, "line", sal
.line
);
586 annotate_frame_source_end ();
590 if (!funname
|| (!sal
.symtab
|| !sal
.symtab
->filename
))
592 char *lib
= PC_SOLIB (fi
->pc
);
595 annotate_frame_where ();
596 ui_out_wrap_hint (uiout
, " ");
597 ui_out_text (uiout
, " from ");
598 ui_out_field_string (uiout
, "from", lib
);
601 #endif /* PC_SOLIB */
603 /* do_cleanups will call ui_out_tuple_end() for us. */
604 do_cleanups (list_chain
);
605 ui_out_text (uiout
, "\n");
606 do_cleanups (old_chain
);
610 /* Show or print the frame info. If this is the tui, it will be shown in
611 the source display */
613 print_frame_info (struct frame_info
*fi
, register int level
, int source
,
616 print_frame_info_base (fi
, level
, source
, args
);
619 /* Show the frame info. If this is the tui, it will be shown in
620 the source display otherwise, nothing is done */
622 show_stack_frame (struct frame_info
*fi
)
627 /* Read a frame specification in whatever the appropriate format is.
628 Call error() if the specification is in any way invalid (i.e.
629 this function never returns NULL). */
632 parse_frame_specification (char *frame_exp
)
636 CORE_ADDR args
[MAXARGS
];
641 char *addr_string
, *p
;
642 struct cleanup
*tmp_cleanup
;
644 while (*frame_exp
== ' ')
649 if (numargs
> MAXARGS
)
650 error ("Too many args in frame specification");
651 /* Parse an argument. */
652 for (p
= frame_exp
; *p
&& *p
!= ' '; p
++)
654 addr_string
= savestring (frame_exp
, p
- frame_exp
);
659 tmp_cleanup
= make_cleanup (xfree
, addr_string
);
661 /* NOTE: we call parse_and_eval and then both
662 value_as_long and value_as_address rather than calling
663 parse_and_eval_long and parse_and_eval_address because
664 of the issue of potential side effects from evaluating
666 vp
= parse_and_eval (addr_string
);
668 level
= value_as_long (vp
);
670 args
[numargs
++] = value_as_address (vp
);
671 do_cleanups (tmp_cleanup
);
674 /* Skip spaces, move to possible next arg. */
684 if (selected_frame
== NULL
)
685 error ("No selected frame.");
686 return selected_frame
;
690 struct frame_info
*fid
=
691 find_relative_frame (get_current_frame (), &level
);
692 struct frame_info
*tfid
;
695 /* find_relative_frame was successful */
698 /* If SETUP_ARBITRARY_FRAME is defined, then frame specifications
699 take at least 2 addresses. It is important to detect this case
700 here so that "frame 100" does not give a confusing error message
701 like "frame specification requires two addresses". This of course
702 does not solve the "frame 100" problem for machines on which
703 a frame specification can be made with one address. To solve
704 that, we need a new syntax for a specifying a frame by address.
705 I think the cleanest syntax is $frame(0x45) ($frame(0x23,0x45) for
706 two args, etc.), but people might think that is too much typing,
707 so I guess *0x23,0x45 would be a possible alternative (commas
708 really should be used instead of spaces to delimit; using spaces
709 normally works in an expression). */
710 #ifdef SETUP_ARBITRARY_FRAME
711 error ("No frame %s", paddr_d (args
[0]));
714 /* If (s)he specifies the frame with an address, he deserves what
715 (s)he gets. Still, give the highest one that matches. */
717 for (fid
= get_current_frame ();
718 fid
&& fid
->frame
!= args
[0];
719 fid
= get_prev_frame (fid
))
723 while ((tfid
= get_prev_frame (fid
)) &&
724 (tfid
->frame
== args
[0]))
727 /* We couldn't identify the frame as an existing frame, but
728 perhaps we can create one with a single argument. */
732 #ifdef SETUP_ARBITRARY_FRAME
733 return SETUP_ARBITRARY_FRAME (numargs
, args
);
735 /* Usual case. Do it here rather than have everyone supply
736 a SETUP_ARBITRARY_FRAME that does this. */
738 return create_new_frame (args
[0], 0);
739 error ("Too many args in frame specification");
746 /* FRAME_ARGS_ADDRESS_CORRECT is just like FRAME_ARGS_ADDRESS except
747 that if it is unsure about the answer, it returns 0
748 instead of guessing (this happens on the VAX and i960, for example).
750 On most machines, we never have to guess about the args address,
751 so FRAME_ARGS_ADDRESS{,_CORRECT} are the same. */
752 #if !defined (FRAME_ARGS_ADDRESS_CORRECT)
753 #define FRAME_ARGS_ADDRESS_CORRECT FRAME_ARGS_ADDRESS
756 /* Print verbosely the selected frame or the frame at address ADDR.
757 This means absolutely all information in the frame is printed. */
760 frame_info (char *addr_exp
, int from_tty
)
762 struct frame_info
*fi
;
763 struct symtab_and_line sal
;
766 struct frame_info
*calling_frame_info
;
767 int i
, count
, numregs
;
769 enum language funlang
= language_unknown
;
771 if (!target_has_stack
)
774 fi
= parse_frame_specification (addr_exp
);
776 error ("Invalid frame specified.");
778 sal
= find_pc_line (fi
->pc
,
780 && !(get_frame_type (fi
->next
) == SIGTRAMP_FRAME
)
781 && !deprecated_frame_in_dummy (fi
->next
));
782 func
= get_frame_function (fi
);
783 s
= find_pc_symtab (fi
->pc
);
786 /* I'd like to use SYMBOL_SOURCE_NAME() here, to display
787 * the demangled name that we already have stored in
788 * the symbol table, but we stored a version with
789 * DMGL_PARAMS turned on, and here we don't want
790 * to display parameters. So call the demangler again,
791 * with DMGL_ANSI only. RT
792 * (Yes, I know that printf_symbol_filtered() will
793 * again try to demangle the name on the fly, but
794 * the issue is that if cplus_demangle() fails here,
795 * it'll fail there too. So we want to catch the failure
796 * ("demangled==NULL" case below) here, while we still
797 * have our hands on the function symbol.)
800 funname
= SYMBOL_NAME (func
);
801 funlang
= SYMBOL_LANGUAGE (func
);
802 if (funlang
== language_cplus
)
804 demangled
= cplus_demangle (funname
, DMGL_ANSI
);
805 /* If the demangler fails, try the demangled name
806 * from the symbol table. This'll have parameters,
807 * but that's preferable to diplaying a mangled name.
809 if (demangled
== NULL
)
810 funname
= SYMBOL_SOURCE_NAME (func
);
815 register struct minimal_symbol
*msymbol
= lookup_minimal_symbol_by_pc (fi
->pc
);
818 funname
= SYMBOL_NAME (msymbol
);
819 funlang
= SYMBOL_LANGUAGE (msymbol
);
822 calling_frame_info
= get_prev_frame (fi
);
824 if (!addr_exp
&& frame_relative_level (selected_frame
) >= 0)
826 printf_filtered ("Stack level %d, frame at ",
827 frame_relative_level (selected_frame
));
828 print_address_numeric (fi
->frame
, 1, gdb_stdout
);
829 printf_filtered (":\n");
833 printf_filtered ("Stack frame at ");
834 print_address_numeric (fi
->frame
, 1, gdb_stdout
);
835 printf_filtered (":\n");
837 printf_filtered (" %s = ", REGISTER_NAME (PC_REGNUM
));
838 print_address_numeric (fi
->pc
, 1, gdb_stdout
);
843 printf_filtered (" in ");
844 fprintf_symbol_filtered (gdb_stdout
, funname
, funlang
,
845 DMGL_ANSI
| DMGL_PARAMS
);
849 printf_filtered (" (%s:%d)", sal
.symtab
->filename
, sal
.line
);
850 puts_filtered ("; ");
852 printf_filtered ("saved %s ", REGISTER_NAME (PC_REGNUM
));
853 print_address_numeric (frame_pc_unwind (fi
), 1, gdb_stdout
);
854 printf_filtered ("\n");
858 frameless
= FRAMELESS_FUNCTION_INVOCATION (fi
);
860 printf_filtered (" (FRAMELESS),");
863 if (calling_frame_info
)
865 printf_filtered (" called by frame at ");
866 print_address_numeric (calling_frame_info
->frame
, 1, gdb_stdout
);
868 if (fi
->next
&& calling_frame_info
)
873 printf_filtered (" caller of frame at ");
874 print_address_numeric (fi
->next
->frame
, 1, gdb_stdout
);
876 if (fi
->next
|| calling_frame_info
)
877 puts_filtered ("\n");
879 printf_filtered (" source language %s.\n", language_str (s
->language
));
881 #ifdef PRINT_EXTRA_FRAME_INFO
882 PRINT_EXTRA_FRAME_INFO (fi
);
886 /* Address of the argument list for this frame, or 0. */
887 CORE_ADDR arg_list
= FRAME_ARGS_ADDRESS_CORRECT (fi
);
888 /* Number of args for this frame, or -1 if unknown. */
892 printf_filtered (" Arglist at unknown address.\n");
895 printf_filtered (" Arglist at ");
896 print_address_numeric (arg_list
, 1, gdb_stdout
);
897 printf_filtered (",");
899 numargs
= FRAME_NUM_ARGS (fi
);
901 puts_filtered (" args: ");
902 else if (numargs
== 0)
903 puts_filtered (" no args.");
904 else if (numargs
== 1)
905 puts_filtered (" 1 arg: ");
907 printf_filtered (" %d args: ", numargs
);
908 print_frame_args (func
, fi
, numargs
, gdb_stdout
);
909 puts_filtered ("\n");
913 /* Address of the local variables for this frame, or 0. */
914 CORE_ADDR arg_list
= FRAME_LOCALS_ADDRESS (fi
);
917 printf_filtered (" Locals at unknown address,");
920 printf_filtered (" Locals at ");
921 print_address_numeric (arg_list
, 1, gdb_stdout
);
922 printf_filtered (",");
926 if (fi
->saved_regs
== NULL
)
927 FRAME_INIT_SAVED_REGS (fi
);
928 /* Print as much information as possible on the location of all the
939 /* The sp is special; what's displayed isn't the save address, but
940 the value of the previous frame's sp. This is a legacy thing,
941 at one stage the frame cached the previous frame's SP instead
942 of its address, hence it was easiest to just display the cached
946 /* Find out the location of the saved stack pointer with out
947 actually evaluating it. */
948 frame_register_unwind (fi
, SP_REGNUM
, &optimized
, &lval
, &addr
,
950 if (!optimized
&& lval
== not_lval
)
952 void *value
= alloca (MAX_REGISTER_RAW_SIZE
);
954 frame_register_unwind (fi
, SP_REGNUM
, &optimized
, &lval
, &addr
,
956 sp
= extract_address (value
, REGISTER_RAW_SIZE (SP_REGNUM
));
957 printf_filtered (" Previous frame's sp is ");
958 print_address_numeric (sp
, 1, gdb_stdout
);
959 printf_filtered ("\n");
962 else if (!optimized
&& lval
== lval_memory
)
964 printf_filtered (" Previous frame's sp at ");
965 print_address_numeric (addr
, 1, gdb_stdout
);
966 printf_filtered ("\n");
969 else if (!optimized
&& lval
== lval_register
)
971 printf_filtered (" Previous frame's sp in %s\n",
972 REGISTER_NAME (realnum
));
975 /* else keep quiet. */
979 numregs
= NUM_REGS
+ NUM_PSEUDO_REGS
;
980 for (i
= 0; i
< numregs
; i
++)
983 /* Find out the location of the saved register without
984 fetching the corresponding value. */
985 frame_register_unwind (fi
, i
, &optimized
, &lval
, &addr
, &realnum
,
987 /* For moment, only display registers that were saved on the
989 if (!optimized
&& lval
== lval_memory
)
992 puts_filtered (" Saved registers:\n ");
996 printf_filtered (" %s at ", REGISTER_NAME (i
));
997 print_address_numeric (addr
, 1, gdb_stdout
);
1001 if (count
|| need_nl
)
1002 puts_filtered ("\n");
1007 /* Set a limit on the number of frames printed by default in a
1010 static int backtrace_limit
;
1013 set_backtrace_limit_command (char *count_exp
, int from_tty
)
1015 int count
= parse_and_eval_long (count_exp
);
1018 error ("Negative argument not meaningful as backtrace limit.");
1020 backtrace_limit
= count
;
1024 backtrace_limit_info (char *arg
, int from_tty
)
1027 error ("\"Info backtrace-limit\" takes no arguments.");
1029 printf_unfiltered ("Backtrace limit: %d.\n", backtrace_limit
);
1033 /* Print briefly all stack frames or just the innermost COUNT frames. */
1035 static void backtrace_command_1 (char *count_exp
, int show_locals
,
1038 backtrace_command_1 (char *count_exp
, int show_locals
, int from_tty
)
1040 struct frame_info
*fi
;
1043 register struct frame_info
*trailing
;
1044 register int trailing_level
;
1046 if (!target_has_stack
)
1047 error ("No stack.");
1049 /* The following code must do two things. First, it must
1050 set the variable TRAILING to the frame from which we should start
1051 printing. Second, it must set the variable count to the number
1052 of frames which we should print, or -1 if all of them. */
1053 trailing
= get_current_frame ();
1055 /* The target can be in a state where there is no valid frames
1056 (e.g., just connected). */
1057 if (trailing
== NULL
)
1058 error ("No stack.");
1063 count
= parse_and_eval_long (count_exp
);
1066 struct frame_info
*current
;
1071 while (current
&& count
--)
1074 current
= get_prev_frame (current
);
1077 /* Will stop when CURRENT reaches the top of the stack. TRAILING
1078 will be COUNT below it. */
1082 trailing
= get_prev_frame (trailing
);
1083 current
= get_prev_frame (current
);
1095 struct partial_symtab
*ps
;
1097 /* Read in symbols for all of the frames. Need to do this in
1098 a separate pass so that "Reading in symbols for xxx" messages
1099 don't screw up the appearance of the backtrace. Also
1100 if people have strong opinions against reading symbols for
1101 backtrace this may have to be an option. */
1105 fi
= get_prev_frame (fi
))
1108 ps
= find_pc_psymtab (frame_address_in_block (fi
));
1110 PSYMTAB_TO_SYMTAB (ps
); /* Force syms to come in */
1114 for (i
= 0, fi
= trailing
;
1116 i
++, fi
= get_prev_frame (fi
))
1120 /* Don't use print_stack_frame; if an error() occurs it probably
1121 means further attempts to backtrace would fail (on the other
1122 hand, perhaps the code does or could be fixed to make sure
1123 the frame->prev field gets set to NULL in that case). */
1124 print_frame_info_base (fi
, trailing_level
+ i
, 0, 1);
1126 print_frame_local_vars (fi
, 1, gdb_stdout
);
1129 /* If we've stopped before the end, mention that. */
1131 printf_filtered ("(More stack frames follow...)\n");
1135 backtrace_command (char *arg
, int from_tty
)
1137 struct cleanup
*old_chain
= (struct cleanup
*) NULL
;
1138 char **argv
= (char **) NULL
;
1139 int argIndicatingFullTrace
= (-1), totArgLen
= 0, argc
= 0;
1142 if (arg
!= (char *) NULL
)
1146 argv
= buildargv (arg
);
1147 old_chain
= make_cleanup_freeargv (argv
);
1149 for (i
= 0; (argv
[i
] != (char *) NULL
); i
++)
1153 for (j
= 0; (j
< strlen (argv
[i
])); j
++)
1154 argv
[i
][j
] = tolower (argv
[i
][j
]);
1156 if (argIndicatingFullTrace
< 0 && subset_compare (argv
[i
], "full"))
1157 argIndicatingFullTrace
= argc
;
1161 totArgLen
+= strlen (argv
[i
]);
1165 if (argIndicatingFullTrace
>= 0)
1169 argPtr
= (char *) xmalloc (totArgLen
+ 1);
1174 memset (argPtr
, 0, totArgLen
+ 1);
1175 for (i
= 0; (i
< (argc
+ 1)); i
++)
1177 if (i
!= argIndicatingFullTrace
)
1179 strcat (argPtr
, argv
[i
]);
1180 strcat (argPtr
, " ");
1186 argPtr
= (char *) NULL
;
1190 backtrace_command_1 (argPtr
, (argIndicatingFullTrace
>= 0), from_tty
);
1192 if (argIndicatingFullTrace
>= 0 && totArgLen
> 0)
1196 do_cleanups (old_chain
);
1199 static void backtrace_full_command (char *arg
, int from_tty
);
1201 backtrace_full_command (char *arg
, int from_tty
)
1203 backtrace_command_1 (arg
, 1, from_tty
);
1207 /* Print the local variables of a block B active in FRAME.
1208 Return 1 if any variables were printed; 0 otherwise. */
1211 print_block_frame_locals (struct block
*b
, register struct frame_info
*fi
,
1212 int num_tabs
, register struct ui_file
*stream
)
1215 register struct symbol
*sym
;
1216 register int values_printed
= 0;
1218 ALL_BLOCK_SYMBOLS (b
, i
, sym
)
1220 switch (SYMBOL_CLASS (sym
))
1227 for (j
= 0; j
< num_tabs
; j
++)
1228 fputs_filtered ("\t", stream
);
1229 fputs_filtered (SYMBOL_SOURCE_NAME (sym
), stream
);
1230 fputs_filtered (" = ", stream
);
1231 print_variable_value (sym
, fi
, stream
);
1232 fprintf_filtered (stream
, "\n");
1236 /* Ignore symbols which are not locals. */
1240 return values_printed
;
1243 /* Same, but print labels. */
1246 print_block_frame_labels (struct block
*b
, int *have_default
,
1247 register struct ui_file
*stream
)
1250 register struct symbol
*sym
;
1251 register int values_printed
= 0;
1253 ALL_BLOCK_SYMBOLS (b
, i
, sym
)
1255 if (STREQ (SYMBOL_NAME (sym
), "default"))
1261 if (SYMBOL_CLASS (sym
) == LOC_LABEL
)
1263 struct symtab_and_line sal
;
1264 sal
= find_pc_line (SYMBOL_VALUE_ADDRESS (sym
), 0);
1266 fputs_filtered (SYMBOL_SOURCE_NAME (sym
), stream
);
1269 fprintf_filtered (stream
, " ");
1270 print_address_numeric (SYMBOL_VALUE_ADDRESS (sym
), 1, stream
);
1272 fprintf_filtered (stream
, " in file %s, line %d\n",
1273 sal
.symtab
->filename
, sal
.line
);
1276 return values_printed
;
1279 /* Print on STREAM all the local variables in frame FRAME,
1280 including all the blocks active in that frame
1283 Returns 1 if the job was done,
1284 or 0 if nothing was printed because we have no info
1285 on the function running in FRAME. */
1288 print_frame_local_vars (register struct frame_info
*fi
, register int num_tabs
,
1289 register struct ui_file
*stream
)
1291 register struct block
*block
= get_frame_block (fi
, 0);
1292 register int values_printed
= 0;
1296 fprintf_filtered (stream
, "No symbol table info available.\n");
1302 if (print_block_frame_locals (block
, fi
, num_tabs
, stream
))
1304 /* After handling the function's top-level block, stop.
1305 Don't continue to its superblock, the block of
1306 per-file symbols. */
1307 if (BLOCK_FUNCTION (block
))
1309 block
= BLOCK_SUPERBLOCK (block
);
1312 if (!values_printed
)
1314 fprintf_filtered (stream
, "No locals.\n");
1318 /* Same, but print labels. */
1321 print_frame_label_vars (register struct frame_info
*fi
, int this_level_only
,
1322 register struct ui_file
*stream
)
1324 register struct blockvector
*bl
;
1325 register struct block
*block
= get_frame_block (fi
, 0);
1326 register int values_printed
= 0;
1327 int index
, have_default
= 0;
1328 char *blocks_printed
;
1329 CORE_ADDR pc
= fi
->pc
;
1333 fprintf_filtered (stream
, "No symbol table info available.\n");
1337 bl
= blockvector_for_pc (BLOCK_END (block
) - 4, &index
);
1338 blocks_printed
= (char *) alloca (BLOCKVECTOR_NBLOCKS (bl
) * sizeof (char));
1339 memset (blocks_printed
, 0, BLOCKVECTOR_NBLOCKS (bl
) * sizeof (char));
1343 CORE_ADDR end
= BLOCK_END (block
) - 4;
1346 if (bl
!= blockvector_for_pc (end
, &index
))
1347 error ("blockvector blotch");
1348 if (BLOCKVECTOR_BLOCK (bl
, index
) != block
)
1349 error ("blockvector botch");
1350 last_index
= BLOCKVECTOR_NBLOCKS (bl
);
1353 /* Don't print out blocks that have gone by. */
1354 while (index
< last_index
1355 && BLOCK_END (BLOCKVECTOR_BLOCK (bl
, index
)) < pc
)
1358 while (index
< last_index
1359 && BLOCK_END (BLOCKVECTOR_BLOCK (bl
, index
)) < end
)
1361 if (blocks_printed
[index
] == 0)
1363 if (print_block_frame_labels (BLOCKVECTOR_BLOCK (bl
, index
), &have_default
, stream
))
1365 blocks_printed
[index
] = 1;
1371 if (values_printed
&& this_level_only
)
1374 /* After handling the function's top-level block, stop.
1375 Don't continue to its superblock, the block of
1376 per-file symbols. */
1377 if (BLOCK_FUNCTION (block
))
1379 block
= BLOCK_SUPERBLOCK (block
);
1382 if (!values_printed
&& !this_level_only
)
1384 fprintf_filtered (stream
, "No catches.\n");
1390 locals_info (char *args
, int from_tty
)
1392 if (!selected_frame
)
1393 error ("No frame selected.");
1394 print_frame_local_vars (selected_frame
, 0, gdb_stdout
);
1398 catch_info (char *ignore
, int from_tty
)
1400 struct symtab_and_line
*sal
;
1402 /* Check for target support for exception handling */
1403 sal
= target_enable_exception_callback (EX_EVENT_CATCH
, 1);
1406 /* Currently not handling this */
1407 /* Ideally, here we should interact with the C++ runtime
1408 system to find the list of active handlers, etc. */
1409 fprintf_filtered (gdb_stdout
, "Info catch not supported with this target/compiler combination.\n");
1411 if (!selected_frame
)
1412 error ("No frame selected.");
1417 /* Assume g++ compiled code -- old v 4.16 behaviour */
1418 if (!selected_frame
)
1419 error ("No frame selected.");
1421 print_frame_label_vars (selected_frame
, 0, gdb_stdout
);
1426 print_frame_arg_vars (register struct frame_info
*fi
,
1427 register struct ui_file
*stream
)
1429 struct symbol
*func
= get_frame_function (fi
);
1430 register struct block
*b
;
1432 register struct symbol
*sym
, *sym2
;
1433 register int values_printed
= 0;
1437 fprintf_filtered (stream
, "No symbol table info available.\n");
1441 b
= SYMBOL_BLOCK_VALUE (func
);
1442 ALL_BLOCK_SYMBOLS (b
, i
, sym
)
1444 switch (SYMBOL_CLASS (sym
))
1450 case LOC_REGPARM_ADDR
:
1451 case LOC_BASEREG_ARG
:
1453 fputs_filtered (SYMBOL_SOURCE_NAME (sym
), stream
);
1454 fputs_filtered (" = ", stream
);
1456 /* We have to look up the symbol because arguments can have
1457 two entries (one a parameter, one a local) and the one we
1458 want is the local, which lookup_symbol will find for us.
1459 This includes gcc1 (not gcc2) on the sparc when passing a
1460 small structure and gcc2 when the argument type is float
1461 and it is passed as a double and converted to float by
1462 the prologue (in the latter case the type of the LOC_ARG
1463 symbol is double and the type of the LOC_LOCAL symbol is
1464 float). There are also LOC_ARG/LOC_REGISTER pairs which
1465 are not combined in symbol-reading. */
1467 sym2
= lookup_symbol (SYMBOL_NAME (sym
),
1468 b
, VAR_NAMESPACE
, (int *) NULL
, (struct symtab
**) NULL
);
1469 print_variable_value (sym2
, fi
, stream
);
1470 fprintf_filtered (stream
, "\n");
1474 /* Don't worry about things which aren't arguments. */
1478 if (!values_printed
)
1480 fprintf_filtered (stream
, "No arguments.\n");
1485 args_info (char *ignore
, int from_tty
)
1487 if (!selected_frame
)
1488 error ("No frame selected.");
1489 print_frame_arg_vars (selected_frame
, gdb_stdout
);
1494 args_plus_locals_info (char *ignore
, int from_tty
)
1496 args_info (ignore
, from_tty
);
1497 locals_info (ignore
, from_tty
);
1501 /* Select frame FI (or NULL - to invalidate the current frame). */
1504 select_frame (struct frame_info
*fi
)
1506 register struct symtab
*s
;
1508 selected_frame
= fi
;
1509 /* NOTE: cagney/2002-05-04: FI can be NULL. This occures when the
1510 frame is being invalidated. */
1511 if (selected_frame_level_changed_hook
)
1512 selected_frame_level_changed_hook (frame_relative_level (fi
));
1514 /* FIXME: kseitz/2002-08-28: It would be nice to call
1515 selected_frame_level_changed_event right here, but due to limitations
1516 in the current interfaces, we would end up flooding UIs with events
1517 because select_frame is used extensively internally.
1519 Once we have frame-parameterized frame (and frame-related) commands,
1520 the event notification can be moved here, since this function will only
1521 be called when the users selected frame is being changed. */
1523 /* Ensure that symbols for this frame are read in. Also, determine the
1524 source language of this frame, and switch to it if desired. */
1527 s
= find_pc_symtab (fi
->pc
);
1529 && s
->language
!= current_language
->la_language
1530 && s
->language
!= language_unknown
1531 && language_mode
== language_mode_auto
)
1533 set_language (s
->language
);
1539 /* Select frame FI. Also print the stack frame and show the source if
1540 this is the tui version. */
1542 select_and_print_frame (struct frame_info
*fi
)
1547 print_stack_frame (fi
, frame_relative_level (fi
), 1);
1551 /* Return the symbol-block in which the selected frame is executing.
1552 Can return zero under various legitimate circumstances.
1554 If ADDR_IN_BLOCK is non-zero, set *ADDR_IN_BLOCK to the relevant
1555 code address within the block returned. We use this to decide
1556 which macros are in scope. */
1559 get_selected_block (CORE_ADDR
*addr_in_block
)
1561 if (!target_has_stack
)
1564 if (!selected_frame
)
1565 return get_current_block (addr_in_block
);
1566 return get_frame_block (selected_frame
, addr_in_block
);
1569 /* Find a frame a certain number of levels away from FRAME.
1570 LEVEL_OFFSET_PTR points to an int containing the number of levels.
1571 Positive means go to earlier frames (up); negative, the reverse.
1572 The int that contains the number of levels is counted toward
1573 zero as the frames for those levels are found.
1574 If the top or bottom frame is reached, that frame is returned,
1575 but the final value of *LEVEL_OFFSET_PTR is nonzero and indicates
1576 how much farther the original request asked to go. */
1579 find_relative_frame (register struct frame_info
*frame
,
1580 register int *level_offset_ptr
)
1582 register struct frame_info
*prev
;
1583 register struct frame_info
*frame1
;
1585 /* Going up is simple: just do get_prev_frame enough times
1586 or until initial frame is reached. */
1587 while (*level_offset_ptr
> 0)
1589 prev
= get_prev_frame (frame
);
1592 (*level_offset_ptr
)--;
1595 /* Going down is just as simple. */
1596 if (*level_offset_ptr
< 0)
1598 while (*level_offset_ptr
< 0)
1600 frame1
= get_next_frame (frame
);
1604 (*level_offset_ptr
)++;
1610 /* The "select_frame" command. With no arg, NOP.
1611 With arg LEVEL_EXP, select the frame at level LEVEL if it is a
1612 valid level. Otherwise, treat level_exp as an address expression
1613 and select it. See parse_frame_specification for more info on proper
1614 frame expressions. */
1618 select_frame_command_wrapper (char *level_exp
, int from_tty
)
1620 select_frame_command (level_exp
, from_tty
);
1624 select_frame_command (char *level_exp
, int from_tty
)
1626 struct frame_info
*frame
;
1627 int level
= frame_relative_level (selected_frame
);
1629 if (!target_has_stack
)
1630 error ("No stack.");
1632 frame
= parse_frame_specification (level_exp
);
1634 select_frame (frame
);
1635 if (level
!= frame_relative_level (selected_frame
))
1636 selected_frame_level_changed_event (frame_relative_level (selected_frame
));
1639 /* The "frame" command. With no arg, print selected frame briefly.
1640 With arg, behaves like select_frame and then prints the selected
1644 frame_command (char *level_exp
, int from_tty
)
1646 select_frame_command (level_exp
, from_tty
);
1647 show_and_print_stack_frame (selected_frame
,
1648 frame_relative_level (selected_frame
), 1);
1651 /* The XDB Compatibility command to print the current frame. */
1654 current_frame_command (char *level_exp
, int from_tty
)
1656 if (target_has_stack
== 0 || selected_frame
== 0)
1657 error ("No stack.");
1658 print_only_stack_frame (selected_frame
,
1659 frame_relative_level (selected_frame
), 1);
1662 /* Select the frame up one or COUNT stack levels
1663 from the previously selected frame, and print it briefly. */
1667 up_silently_base (char *count_exp
)
1669 register struct frame_info
*fi
;
1670 int count
= 1, count1
;
1672 count
= parse_and_eval_long (count_exp
);
1675 if (target_has_stack
== 0 || selected_frame
== 0)
1676 error ("No stack.");
1678 fi
= find_relative_frame (selected_frame
, &count1
);
1679 if (count1
!= 0 && count_exp
== 0)
1680 error ("Initial frame selected; you cannot go up.");
1682 selected_frame_level_changed_event (frame_relative_level (selected_frame
));
1686 up_silently_command (char *count_exp
, int from_tty
)
1688 up_silently_base (count_exp
);
1692 up_command (char *count_exp
, int from_tty
)
1694 up_silently_base (count_exp
);
1695 show_and_print_stack_frame (selected_frame
,
1696 frame_relative_level (selected_frame
), 1);
1699 /* Select the frame down one or COUNT stack levels
1700 from the previously selected frame, and print it briefly. */
1704 down_silently_base (char *count_exp
)
1706 register struct frame_info
*frame
;
1707 int count
= -1, count1
;
1709 count
= -parse_and_eval_long (count_exp
);
1712 if (target_has_stack
== 0 || selected_frame
== 0)
1713 error ("No stack.");
1715 frame
= find_relative_frame (selected_frame
, &count1
);
1716 if (count1
!= 0 && count_exp
== 0)
1719 /* We only do this if count_exp is not specified. That way "down"
1720 means to really go down (and let me know if that is
1721 impossible), but "down 9999" can be used to mean go all the way
1722 down without getting an error. */
1724 error ("Bottom (i.e., innermost) frame selected; you cannot go down.");
1727 select_frame (frame
);
1728 selected_frame_level_changed_event (frame_relative_level (selected_frame
));
1733 down_silently_command (char *count_exp
, int from_tty
)
1735 down_silently_base (count_exp
);
1739 down_command (char *count_exp
, int from_tty
)
1741 down_silently_base (count_exp
);
1742 show_and_print_stack_frame (selected_frame
,
1743 frame_relative_level (selected_frame
), 1);
1747 return_command (char *retval_exp
, int from_tty
)
1749 struct symbol
*thisfun
;
1750 CORE_ADDR selected_frame_addr
;
1751 CORE_ADDR selected_frame_pc
;
1752 struct frame_info
*frame
;
1753 struct value
*return_value
= NULL
;
1755 if (selected_frame
== NULL
)
1756 error ("No selected frame.");
1757 thisfun
= get_frame_function (selected_frame
);
1758 selected_frame_addr
= FRAME_FP (selected_frame
);
1759 selected_frame_pc
= selected_frame
->pc
;
1761 /* Compute the return value (if any -- possibly getting errors here). */
1765 struct type
*return_type
= NULL
;
1767 return_value
= parse_and_eval (retval_exp
);
1769 /* Cast return value to the return type of the function. */
1770 if (thisfun
!= NULL
)
1771 return_type
= TYPE_TARGET_TYPE (SYMBOL_TYPE (thisfun
));
1772 if (return_type
== NULL
)
1773 return_type
= builtin_type_int
;
1774 return_value
= value_cast (return_type
, return_value
);
1776 /* Make sure we have fully evaluated it, since
1777 it might live in the stack frame we're about to pop. */
1778 if (VALUE_LAZY (return_value
))
1779 value_fetch_lazy (return_value
);
1782 /* If interactive, require confirmation. */
1788 if (!query ("Make %s return now? ", SYMBOL_SOURCE_NAME (thisfun
)))
1790 error ("Not confirmed.");
1794 else if (!query ("Make selected stack frame return now? "))
1795 error ("Not confirmed.");
1798 /* Do the real work. Pop until the specified frame is current. We
1799 use this method because the selected_frame is not valid after
1800 a POP_FRAME. The pc comparison makes this work even if the
1801 selected frame shares its fp with another frame. */
1803 while (selected_frame_addr
!= (frame
= get_current_frame ())->frame
1804 || selected_frame_pc
!= frame
->pc
)
1807 /* Then pop that frame. */
1811 /* Compute the return value (if any) and store in the place
1812 for return values. */
1815 set_return_value (return_value
);
1817 /* If we are at the end of a call dummy now, pop the dummy frame too. */
1819 if (CALL_DUMMY_HAS_COMPLETED (read_pc(), read_sp (),
1820 FRAME_FP (get_current_frame ())))
1823 /* If interactive, print the frame that is now current. */
1826 frame_command ("0", 1);
1828 select_frame_command ("0", 0);
1831 /* Sets the scope to input function name, provided that the
1832 function is within the current stack frame */
1834 struct function_bounds
1836 CORE_ADDR low
, high
;
1839 static void func_command (char *arg
, int from_tty
);
1841 func_command (char *arg
, int from_tty
)
1843 struct frame_info
*fp
;
1845 struct symtabs_and_lines sals
;
1848 struct function_bounds
*func_bounds
= (struct function_bounds
*) NULL
;
1850 if (arg
!= (char *) NULL
)
1853 fp
= parse_frame_specification ("0");
1854 sals
= decode_line_spec (arg
, 1);
1855 func_bounds
= (struct function_bounds
*) xmalloc (
1856 sizeof (struct function_bounds
) * sals
.nelts
);
1857 for (i
= 0; (i
< sals
.nelts
&& !found
); i
++)
1859 if (sals
.sals
[i
].pc
== (CORE_ADDR
) 0 ||
1860 find_pc_partial_function (sals
.sals
[i
].pc
,
1862 &func_bounds
[i
].low
,
1863 &func_bounds
[i
].high
) == 0)
1865 func_bounds
[i
].low
=
1866 func_bounds
[i
].high
= (CORE_ADDR
) NULL
;
1872 for (i
= 0; (i
< sals
.nelts
&& !found
); i
++)
1873 found
= (fp
->pc
>= func_bounds
[i
].low
&&
1874 fp
->pc
< func_bounds
[i
].high
);
1878 fp
= find_relative_frame (fp
, &level
);
1881 while (!found
&& level
== 0);
1884 xfree (func_bounds
);
1887 printf_filtered ("'%s' not within current stack frame.\n", arg
);
1888 else if (fp
!= selected_frame
)
1889 select_and_print_frame (fp
);
1892 /* Gets the language of the current frame. */
1895 get_frame_language (void)
1897 register struct symtab
*s
;
1898 enum language flang
; /* The language of the current frame */
1902 s
= find_pc_symtab (selected_frame
->pc
);
1904 flang
= s
->language
;
1906 flang
= language_unknown
;
1909 flang
= language_unknown
;
1915 _initialize_stack (void)
1918 backtrace_limit
= 30;
1921 add_com ("return", class_stack
, return_command
,
1922 "Make selected stack frame return to its caller.\n\
1923 Control remains in the debugger, but when you continue\n\
1924 execution will resume in the frame above the one now selected.\n\
1925 If an argument is given, it is an expression for the value to return.");
1927 add_com ("up", class_stack
, up_command
,
1928 "Select and print stack frame that called this one.\n\
1929 An argument says how many frames up to go.");
1930 add_com ("up-silently", class_support
, up_silently_command
,
1931 "Same as the `up' command, but does not print anything.\n\
1932 This is useful in command scripts.");
1934 add_com ("down", class_stack
, down_command
,
1935 "Select and print stack frame called by this one.\n\
1936 An argument says how many frames down to go.");
1937 add_com_alias ("do", "down", class_stack
, 1);
1938 add_com_alias ("dow", "down", class_stack
, 1);
1939 add_com ("down-silently", class_support
, down_silently_command
,
1940 "Same as the `down' command, but does not print anything.\n\
1941 This is useful in command scripts.");
1943 add_com ("frame", class_stack
, frame_command
,
1944 "Select and print a stack frame.\n\
1945 With no argument, print the selected stack frame. (See also \"info frame\").\n\
1946 An argument specifies the frame to select.\n\
1947 It can be a stack frame number or the address of the frame.\n\
1948 With argument, nothing is printed if input is coming from\n\
1949 a command file or a user-defined command.");
1951 add_com_alias ("f", "frame", class_stack
, 1);
1955 add_com ("L", class_stack
, current_frame_command
,
1956 "Print the current stack frame.\n");
1957 add_com_alias ("V", "frame", class_stack
, 1);
1959 add_com ("select-frame", class_stack
, select_frame_command
,
1960 "Select a stack frame without printing anything.\n\
1961 An argument specifies the frame to select.\n\
1962 It can be a stack frame number or the address of the frame.\n");
1964 add_com ("backtrace", class_stack
, backtrace_command
,
1965 "Print backtrace of all stack frames, or innermost COUNT frames.\n\
1966 With a negative argument, print outermost -COUNT frames.\n\
1967 Use of the 'full' qualifier also prints the values of the local variables.\n");
1968 add_com_alias ("bt", "backtrace", class_stack
, 0);
1971 add_com_alias ("t", "backtrace", class_stack
, 0);
1972 add_com ("T", class_stack
, backtrace_full_command
,
1973 "Print backtrace of all stack frames, or innermost COUNT frames \n\
1974 and the values of the local variables.\n\
1975 With a negative argument, print outermost -COUNT frames.\n\
1976 Usage: T <count>\n");
1979 add_com_alias ("where", "backtrace", class_alias
, 0);
1980 add_info ("stack", backtrace_command
,
1981 "Backtrace of the stack, or innermost COUNT frames.");
1982 add_info_alias ("s", "stack", 1);
1983 add_info ("frame", frame_info
,
1984 "All about selected stack frame, or frame at ADDR.");
1985 add_info_alias ("f", "frame", 1);
1986 add_info ("locals", locals_info
,
1987 "Local variables of current stack frame.");
1988 add_info ("args", args_info
,
1989 "Argument variables of current stack frame.");
1991 add_com ("l", class_info
, args_plus_locals_info
,
1992 "Argument and local variables of current stack frame.");
1995 add_com ("func", class_stack
, func_command
,
1996 "Select the stack frame that contains <func>.\nUsage: func <name>\n");
1998 add_info ("catch", catch_info
,
1999 "Exceptions that can be caught in the current stack frame.");
2002 add_cmd ("backtrace-limit", class_stack
, set_backtrace_limit_command
,
2003 "Specify maximum number of frames for \"backtrace\" to print by default.",
2005 add_info ("backtrace-limit", backtrace_limit_info
,
2006 "The maximum number of frames for \"backtrace\" to print by default.");