1 /* Print and select stack frames for GDB, the GNU debugger.
3 Copyright (C) 1986-2018 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
24 #include "expression.h"
31 #include "breakpoint.h"
38 #include "dictionary.h"
39 #include "reggroups.h"
43 #include "gdbthread.h"
44 #include "cp-support.h"
46 #include "inline-frame.h"
48 #include "cli/cli-utils.h"
52 #include "extension.h"
53 #include "observable.h"
54 #include "common/def-vector.h"
56 /* The possible choices of "set print frame-arguments", and the value
59 static const char *const print_frame_arguments_choices
[] =
60 {"all", "scalars", "none", NULL
};
61 static const char *print_frame_arguments
= "scalars";
63 /* If non-zero, don't invoke pretty-printers for frame arguments. */
64 static int print_raw_frame_arguments
;
66 /* The possible choices of "set print entry-values", and the value
69 const char print_entry_values_no
[] = "no";
70 const char print_entry_values_only
[] = "only";
71 const char print_entry_values_preferred
[] = "preferred";
72 const char print_entry_values_if_needed
[] = "if-needed";
73 const char print_entry_values_both
[] = "both";
74 const char print_entry_values_compact
[] = "compact";
75 const char print_entry_values_default
[] = "default";
76 static const char *const print_entry_values_choices
[] =
78 print_entry_values_no
,
79 print_entry_values_only
,
80 print_entry_values_preferred
,
81 print_entry_values_if_needed
,
82 print_entry_values_both
,
83 print_entry_values_compact
,
84 print_entry_values_default
,
87 const char *print_entry_values
= print_entry_values_default
;
89 /* Prototypes for local functions. */
91 static void print_frame_local_vars (struct frame_info
*, int,
94 static void print_frame (struct frame_info
*frame
, int print_level
,
95 enum print_what print_what
, int print_args
,
96 struct symtab_and_line sal
);
98 static void set_last_displayed_sal (int valid
,
99 struct program_space
*pspace
,
101 struct symtab
*symtab
,
104 static struct frame_info
*find_frame_for_function (const char *);
105 static struct frame_info
*find_frame_for_address (CORE_ADDR
);
107 /* Zero means do things normally; we are interacting directly with the
108 user. One means print the full filename and linenumber when a
109 frame is printed, and do so in a format emacs18/emacs19.22 can
110 parse. Two means print similar annotations, but in many more
111 cases and in a slightly different syntax. */
113 int annotation_level
= 0;
115 /* These variables hold the last symtab and line we displayed to the user.
116 * This is where we insert a breakpoint or a skiplist entry by default. */
117 static int last_displayed_sal_valid
= 0;
118 static struct program_space
*last_displayed_pspace
= 0;
119 static CORE_ADDR last_displayed_addr
= 0;
120 static struct symtab
*last_displayed_symtab
= 0;
121 static int last_displayed_line
= 0;
124 /* Return 1 if we should display the address in addition to the location,
125 because we are in the middle of a statement. */
128 frame_show_address (struct frame_info
*frame
,
129 struct symtab_and_line sal
)
131 /* If there is a line number, but no PC, then there is no location
132 information associated with this sal. The only way that should
133 happen is for the call sites of inlined functions (SAL comes from
134 find_frame_sal). Otherwise, we would have some PC range if the
135 SAL came from a line table. */
136 if (sal
.line
!= 0 && sal
.pc
== 0 && sal
.end
== 0)
138 if (get_next_frame (frame
) == NULL
)
139 gdb_assert (inline_skipped_frames (inferior_thread ()) > 0);
141 gdb_assert (get_frame_type (get_next_frame (frame
)) == INLINE_FRAME
);
145 return get_frame_pc (frame
) != sal
.pc
;
151 print_stack_frame_to_uiout (struct ui_out
*uiout
, struct frame_info
*frame
,
152 int print_level
, enum print_what print_what
,
155 scoped_restore save_uiout
= make_scoped_restore (¤t_uiout
, uiout
);
157 print_stack_frame (frame
, print_level
, print_what
, set_current_sal
);
160 /* Show or print a stack frame FRAME briefly. The output is formatted
161 according to PRINT_LEVEL and PRINT_WHAT printing the frame's
162 relative level, function name, argument list, and file name and
163 line number. If the frame's PC is not at the beginning of the
164 source line, the actual PC is printed at the beginning. */
167 print_stack_frame (struct frame_info
*frame
, int print_level
,
168 enum print_what print_what
,
172 /* For mi, alway print location and address. */
173 if (current_uiout
->is_mi_like_p ())
174 print_what
= LOC_AND_ADDRESS
;
178 print_frame_info (frame
, print_level
, print_what
, 1 /* print_args */,
181 set_current_sal_from_frame (frame
);
183 CATCH (e
, RETURN_MASK_ERROR
)
189 /* Print nameless arguments of frame FRAME on STREAM, where START is
190 the offset of the first nameless argument, and NUM is the number of
191 nameless arguments to print. FIRST is nonzero if this is the first
192 argument (not just the first nameless argument). */
195 print_frame_nameless_args (struct frame_info
*frame
, long start
, int num
,
196 int first
, struct ui_file
*stream
)
198 struct gdbarch
*gdbarch
= get_frame_arch (frame
);
199 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
204 for (i
= 0; i
< num
; i
++)
207 argsaddr
= get_frame_args_address (frame
);
210 arg_value
= read_memory_integer (argsaddr
+ start
,
211 sizeof (int), byte_order
);
213 fprintf_filtered (stream
, ", ");
214 fprintf_filtered (stream
, "%ld", arg_value
);
216 start
+= sizeof (int);
220 /* Print single argument of inferior function. ARG must be already
223 Errors are printed as if they would be the parameter value. Use zeroed ARG
224 iff it should not be printed accoring to user settings. */
227 print_frame_arg (const struct frame_arg
*arg
)
229 struct ui_out
*uiout
= current_uiout
;
230 const char *error_message
= NULL
;
234 gdb_assert (!arg
->val
|| !arg
->error
);
235 gdb_assert (arg
->entry_kind
== print_entry_values_no
236 || arg
->entry_kind
== print_entry_values_only
237 || (!uiout
->is_mi_like_p ()
238 && arg
->entry_kind
== print_entry_values_compact
));
240 annotate_arg_emitter arg_emitter
;
241 ui_out_emit_tuple
tuple_emitter (uiout
, NULL
);
242 fprintf_symbol_filtered (&stb
, SYMBOL_PRINT_NAME (arg
->sym
),
243 SYMBOL_LANGUAGE (arg
->sym
), DMGL_PARAMS
| DMGL_ANSI
);
244 if (arg
->entry_kind
== print_entry_values_compact
)
246 /* It is OK to provide invalid MI-like stream as with
247 PRINT_ENTRY_VALUE_COMPACT we never use MI. */
250 fprintf_symbol_filtered (&stb
, SYMBOL_PRINT_NAME (arg
->sym
),
251 SYMBOL_LANGUAGE (arg
->sym
),
252 DMGL_PARAMS
| DMGL_ANSI
);
254 if (arg
->entry_kind
== print_entry_values_only
255 || arg
->entry_kind
== print_entry_values_compact
)
257 uiout
->field_stream ("name", stb
);
258 annotate_arg_name_end ();
261 if (!arg
->val
&& !arg
->error
)
266 error_message
= arg
->error
;
271 const struct language_defn
*language
;
272 struct value_print_options opts
;
274 /* Avoid value_print because it will deref ref parameters. We
275 just want to print their addresses. Print ??? for args whose
276 address we do not know. We pass 2 as "recurse" to val_print
277 because our standard indentation here is 4 spaces, and
278 val_print indents 2 for each recurse. */
280 annotate_arg_value (value_type (arg
->val
));
282 /* Use the appropriate language to display our symbol, unless the
283 user forced the language to a specific language. */
284 if (language_mode
== language_mode_auto
)
285 language
= language_def (SYMBOL_LANGUAGE (arg
->sym
));
287 language
= current_language
;
289 get_no_prettyformat_print_options (&opts
);
291 opts
.raw
= print_raw_frame_arguments
;
293 /* True in "summary" mode, false otherwise. */
294 opts
.summary
= !strcmp (print_frame_arguments
, "scalars");
296 common_val_print (arg
->val
, &stb
, 2, &opts
, language
);
298 CATCH (except
, RETURN_MASK_ERROR
)
300 error_message
= except
.message
;
304 if (error_message
!= NULL
)
305 stb
.printf (_("<error reading variable: %s>"), error_message
);
308 uiout
->field_stream ("value", stb
);
311 /* Read in inferior function local SYM at FRAME into ARGP. Caller is
312 responsible for xfree of ARGP->ERROR. This function never throws an
316 read_frame_local (struct symbol
*sym
, struct frame_info
*frame
,
317 struct frame_arg
*argp
)
325 argp
->val
= read_var_value (sym
, NULL
, frame
);
327 CATCH (except
, RETURN_MASK_ERROR
)
329 argp
->error
= xstrdup (except
.message
);
334 /* Read in inferior function parameter SYM at FRAME into ARGP. Caller is
335 responsible for xfree of ARGP->ERROR. This function never throws an
339 read_frame_arg (struct symbol
*sym
, struct frame_info
*frame
,
340 struct frame_arg
*argp
, struct frame_arg
*entryargp
)
342 struct value
*val
= NULL
, *entryval
= NULL
;
343 char *val_error
= NULL
, *entryval_error
= NULL
;
346 if (print_entry_values
!= print_entry_values_only
347 && print_entry_values
!= print_entry_values_preferred
)
351 val
= read_var_value (sym
, NULL
, frame
);
353 CATCH (except
, RETURN_MASK_ERROR
)
355 val_error
= (char *) alloca (strlen (except
.message
) + 1);
356 strcpy (val_error
, except
.message
);
361 if (SYMBOL_COMPUTED_OPS (sym
) != NULL
362 && SYMBOL_COMPUTED_OPS (sym
)->read_variable_at_entry
!= NULL
363 && print_entry_values
!= print_entry_values_no
364 && (print_entry_values
!= print_entry_values_if_needed
365 || !val
|| value_optimized_out (val
)))
369 const struct symbol_computed_ops
*ops
;
371 ops
= SYMBOL_COMPUTED_OPS (sym
);
372 entryval
= ops
->read_variable_at_entry (sym
, frame
);
374 CATCH (except
, RETURN_MASK_ERROR
)
376 if (except
.error
!= NO_ENTRY_VALUE_ERROR
)
378 entryval_error
= (char *) alloca (strlen (except
.message
) + 1);
379 strcpy (entryval_error
, except
.message
);
384 if (entryval
!= NULL
&& value_optimized_out (entryval
))
387 if (print_entry_values
== print_entry_values_compact
388 || print_entry_values
== print_entry_values_default
)
390 /* For MI do not try to use print_entry_values_compact for ARGP. */
392 if (val
&& entryval
&& !current_uiout
->is_mi_like_p ())
394 struct type
*type
= value_type (val
);
396 if (value_lazy (val
))
397 value_fetch_lazy (val
);
398 if (value_lazy (entryval
))
399 value_fetch_lazy (entryval
);
401 if (value_contents_eq (val
, 0, entryval
, 0, TYPE_LENGTH (type
)))
403 /* Initialize it just to avoid a GCC false warning. */
404 struct value
*val_deref
= NULL
, *entryval_deref
;
406 /* DW_AT_call_value does match with the current
407 value. If it is a reference still try to verify if
408 dereferenced DW_AT_call_data_value does not differ. */
412 struct type
*type_deref
;
414 val_deref
= coerce_ref (val
);
415 if (value_lazy (val_deref
))
416 value_fetch_lazy (val_deref
);
417 type_deref
= value_type (val_deref
);
419 entryval_deref
= coerce_ref (entryval
);
420 if (value_lazy (entryval_deref
))
421 value_fetch_lazy (entryval_deref
);
423 /* If the reference addresses match but dereferenced
424 content does not match print them. */
426 && value_contents_eq (val_deref
, 0,
428 TYPE_LENGTH (type_deref
)))
431 CATCH (except
, RETURN_MASK_ERROR
)
433 /* If the dereferenced content could not be
434 fetched do not display anything. */
435 if (except
.error
== NO_ENTRY_VALUE_ERROR
)
437 else if (except
.message
!= NULL
)
439 entryval_error
= (char *) alloca (strlen (except
.message
) + 1);
440 strcpy (entryval_error
, except
.message
);
445 /* Value was not a reference; and its content matches. */
446 if (val
== val_deref
)
454 /* Try to remove possibly duplicate error message for ENTRYARGP even
457 if (val_error
&& entryval_error
458 && strcmp (val_error
, entryval_error
) == 0)
460 entryval_error
= NULL
;
462 /* Do not se VAL_EQUAL as the same error message may be shown for
463 the entry value even if no entry values are present in the
469 if (entryval
== NULL
)
471 if (print_entry_values
== print_entry_values_preferred
)
473 gdb_assert (val
== NULL
);
477 val
= read_var_value (sym
, NULL
, frame
);
479 CATCH (except
, RETURN_MASK_ERROR
)
481 val_error
= (char *) alloca (strlen (except
.message
) + 1);
482 strcpy (val_error
, except
.message
);
486 if (print_entry_values
== print_entry_values_only
487 || print_entry_values
== print_entry_values_both
488 || (print_entry_values
== print_entry_values_preferred
489 && (!val
|| value_optimized_out (val
))))
491 entryval
= allocate_optimized_out_value (SYMBOL_TYPE (sym
));
492 entryval_error
= NULL
;
495 if ((print_entry_values
== print_entry_values_compact
496 || print_entry_values
== print_entry_values_if_needed
497 || print_entry_values
== print_entry_values_preferred
)
498 && (!val
|| value_optimized_out (val
)) && entryval
!= NULL
)
506 argp
->error
= val_error
? xstrdup (val_error
) : NULL
;
507 if (!val
&& !val_error
)
508 argp
->entry_kind
= print_entry_values_only
;
509 else if ((print_entry_values
== print_entry_values_compact
510 || print_entry_values
== print_entry_values_default
) && val_equal
)
512 argp
->entry_kind
= print_entry_values_compact
;
513 gdb_assert (!current_uiout
->is_mi_like_p ());
516 argp
->entry_kind
= print_entry_values_no
;
518 entryargp
->sym
= sym
;
519 entryargp
->val
= entryval
;
520 entryargp
->error
= entryval_error
? xstrdup (entryval_error
) : NULL
;
521 if (!entryval
&& !entryval_error
)
522 entryargp
->entry_kind
= print_entry_values_no
;
524 entryargp
->entry_kind
= print_entry_values_only
;
527 /* Print the arguments of frame FRAME on STREAM, given the function
528 FUNC running in that frame (as a symbol), where NUM is the number
529 of arguments according to the stack frame (or -1 if the number of
530 arguments is unknown). */
532 /* Note that currently the "number of arguments according to the
533 stack frame" is only known on VAX where i refers to the "number of
534 ints of arguments according to the stack frame". */
537 print_frame_args (struct symbol
*func
, struct frame_info
*frame
,
538 int num
, struct ui_file
*stream
)
540 struct ui_out
*uiout
= current_uiout
;
542 /* Offset of next stack argument beyond the one we have seen that is
543 at the highest offset, or -1 if we haven't come to a stack
545 long highest_offset
= -1;
546 /* Number of ints of arguments that we have printed so far. */
547 int args_printed
= 0;
548 /* True if we should print arguments, false otherwise. */
549 int print_args
= strcmp (print_frame_arguments
, "none");
553 const struct block
*b
= SYMBOL_BLOCK_VALUE (func
);
554 struct block_iterator iter
;
557 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
559 struct frame_arg arg
, entryarg
;
563 /* Keep track of the highest stack argument offset seen, and
564 skip over any kinds of symbols we don't care about. */
566 if (!SYMBOL_IS_ARGUMENT (sym
))
569 switch (SYMBOL_CLASS (sym
))
574 long current_offset
= SYMBOL_VALUE (sym
);
575 int arg_size
= TYPE_LENGTH (SYMBOL_TYPE (sym
));
577 /* Compute address of next argument by adding the size of
578 this argument and rounding to an int boundary. */
580 ((current_offset
+ arg_size
+ sizeof (int) - 1)
581 & ~(sizeof (int) - 1));
583 /* If this is the highest offset seen yet, set
585 if (highest_offset
== -1
586 || (current_offset
> highest_offset
))
587 highest_offset
= current_offset
;
589 /* Add the number of ints we're about to print to
591 args_printed
+= (arg_size
+ sizeof (int) - 1) / sizeof (int);
594 /* We care about types of symbols, but don't need to
595 keep track of stack offsets in them. */
597 case LOC_REGPARM_ADDR
:
599 case LOC_OPTIMIZED_OUT
:
604 /* We have to look up the symbol because arguments can have
605 two entries (one a parameter, one a local) and the one we
606 want is the local, which lookup_symbol will find for us.
607 This includes gcc1 (not gcc2) on SPARC when passing a
608 small structure and gcc2 when the argument type is float
609 and it is passed as a double and converted to float by
610 the prologue (in the latter case the type of the LOC_ARG
611 symbol is double and the type of the LOC_LOCAL symbol is
613 /* But if the parameter name is null, don't try it. Null
614 parameter names occur on the RS/6000, for traceback
615 tables. FIXME, should we even print them? */
617 if (*SYMBOL_LINKAGE_NAME (sym
))
621 nsym
= lookup_symbol_search_name (SYMBOL_SEARCH_NAME (sym
),
622 b
, VAR_DOMAIN
).symbol
;
623 gdb_assert (nsym
!= NULL
);
624 if (SYMBOL_CLASS (nsym
) == LOC_REGISTER
625 && !SYMBOL_IS_ARGUMENT (nsym
))
627 /* There is a LOC_ARG/LOC_REGISTER pair. This means
628 that it was passed on the stack and loaded into a
629 register, or passed in a register and stored in a
630 stack slot. GDB 3.x used the LOC_ARG; GDB
631 4.0-4.11 used the LOC_REGISTER.
633 Reasons for using the LOC_ARG:
635 (1) Because find_saved_registers may be slow for
638 (2) Because registers are often re-used and stack
639 slots rarely (never?) are. Therefore using
640 the stack slot is much less likely to print
643 Reasons why we might want to use the LOC_REGISTER:
645 (1) So that the backtrace prints the same value
646 as "print foo". I see no compelling reason
647 why this needs to be the case; having the
648 backtrace print the value which was passed
649 in, and "print foo" print the value as
650 modified within the called function, makes
653 Additional note: It might be nice if "info args"
654 displayed both values.
656 One more note: There is a case with SPARC
657 structure passing where we need to use the
658 LOC_REGISTER, but this is dealt with by creating
659 a single LOC_REGPARM in symbol reading. */
661 /* Leave sym (the LOC_ARG) alone. */
668 /* Print the current arg. */
671 uiout
->wrap_hint (" ");
675 memset (&arg
, 0, sizeof (arg
));
677 arg
.entry_kind
= print_entry_values_no
;
678 memset (&entryarg
, 0, sizeof (entryarg
));
680 entryarg
.entry_kind
= print_entry_values_no
;
683 read_frame_arg (sym
, frame
, &arg
, &entryarg
);
685 if (arg
.entry_kind
!= print_entry_values_only
)
686 print_frame_arg (&arg
);
688 if (entryarg
.entry_kind
!= print_entry_values_no
)
690 if (arg
.entry_kind
!= print_entry_values_only
)
693 uiout
->wrap_hint (" ");
696 print_frame_arg (&entryarg
);
700 xfree (entryarg
.error
);
706 /* Don't print nameless args in situations where we don't know
707 enough about the stack to find them. */
712 if (highest_offset
== -1)
713 start
= gdbarch_frame_args_skip (get_frame_arch (frame
));
715 start
= highest_offset
;
717 print_frame_nameless_args (frame
, start
, num
- args_printed
,
722 /* Set the current source and line to the location given by frame
723 FRAME, if possible. When CENTER is true, adjust so the relevant
724 line is in the center of the next 'list'. */
727 set_current_sal_from_frame (struct frame_info
*frame
)
729 symtab_and_line sal
= find_frame_sal (frame
);
730 if (sal
.symtab
!= NULL
)
731 set_current_source_symtab_and_line (sal
);
734 /* If ON, GDB will display disassembly of the next source line when
735 execution of the program being debugged stops.
736 If AUTO (which is the default), or there's no line info to determine
737 the source line of the next instruction, display disassembly of next
738 instruction instead. */
740 static enum auto_boolean disassemble_next_line
;
743 show_disassemble_next_line (struct ui_file
*file
, int from_tty
,
744 struct cmd_list_element
*c
,
747 fprintf_filtered (file
,
748 _("Debugger's willingness to use "
749 "disassemble-next-line is %s.\n"),
753 /* Use TRY_CATCH to catch the exception from the gdb_disassembly
754 because it will be broken by filter sometime. */
757 do_gdb_disassembly (struct gdbarch
*gdbarch
,
758 int how_many
, CORE_ADDR low
, CORE_ADDR high
)
763 gdb_disassembly (gdbarch
, current_uiout
,
764 DISASSEMBLY_RAW_INSN
, how_many
,
767 CATCH (exception
, RETURN_MASK_ERROR
)
769 /* If an exception was thrown while doing the disassembly, print
770 the error message, to give the user a clue of what happened. */
771 exception_print (gdb_stderr
, exception
);
776 /* Print information about frame FRAME. The output is format according
777 to PRINT_LEVEL and PRINT_WHAT and PRINT_ARGS. The meaning of
780 SRC_LINE: Print only source line.
781 LOCATION: Print only location.
782 SRC_AND_LOC: Print location and source line.
784 Used in "where" output, and to emit breakpoint or step
788 print_frame_info (struct frame_info
*frame
, int print_level
,
789 enum print_what print_what
, int print_args
,
792 struct gdbarch
*gdbarch
= get_frame_arch (frame
);
795 struct ui_out
*uiout
= current_uiout
;
797 if (get_frame_type (frame
) == DUMMY_FRAME
798 || get_frame_type (frame
) == SIGTRAMP_FRAME
799 || get_frame_type (frame
) == ARCH_FRAME
)
801 ui_out_emit_tuple
tuple_emitter (uiout
, "frame");
803 annotate_frame_begin (print_level
? frame_relative_level (frame
) : 0,
804 gdbarch
, get_frame_pc (frame
));
806 /* Do this regardless of SOURCE because we don't have any source
807 to list for this frame. */
811 uiout
->field_fmt_int (2, ui_left
, "level",
812 frame_relative_level (frame
));
814 if (uiout
->is_mi_like_p ())
816 annotate_frame_address ();
817 uiout
->field_core_addr ("addr",
818 gdbarch
, get_frame_pc (frame
));
819 annotate_frame_address_end ();
822 if (get_frame_type (frame
) == DUMMY_FRAME
)
824 annotate_function_call ();
825 uiout
->field_string ("func", "<function called from gdb>");
827 else if (get_frame_type (frame
) == SIGTRAMP_FRAME
)
829 annotate_signal_handler_caller ();
830 uiout
->field_string ("func", "<signal handler called>");
832 else if (get_frame_type (frame
) == ARCH_FRAME
)
834 uiout
->field_string ("func", "<cross-architecture call>");
837 annotate_frame_end ();
839 /* If disassemble-next-line is set to auto or on output the next
841 if (disassemble_next_line
== AUTO_BOOLEAN_AUTO
842 || disassemble_next_line
== AUTO_BOOLEAN_TRUE
)
843 do_gdb_disassembly (get_frame_arch (frame
), 1,
844 get_frame_pc (frame
), get_frame_pc (frame
) + 1);
849 /* If FRAME is not the innermost frame, that normally means that
850 FRAME->pc points to *after* the call instruction, and we want to
851 get the line containing the call, never the next line. But if
852 the next frame is a SIGTRAMP_FRAME or a DUMMY_FRAME, then the
853 next frame was not entered as the result of a call, and we want
854 to get the line containing FRAME->pc. */
855 symtab_and_line sal
= find_frame_sal (frame
);
857 location_print
= (print_what
== LOCATION
858 || print_what
== LOC_AND_ADDRESS
859 || print_what
== SRC_AND_LOC
);
861 if (location_print
|| !sal
.symtab
)
862 print_frame (frame
, print_level
, print_what
, print_args
, sal
);
864 source_print
= (print_what
== SRC_LINE
|| print_what
== SRC_AND_LOC
);
866 /* If disassemble-next-line is set to auto or on and doesn't have
867 the line debug messages for $pc, output the next instruction. */
868 if ((disassemble_next_line
== AUTO_BOOLEAN_AUTO
869 || disassemble_next_line
== AUTO_BOOLEAN_TRUE
)
870 && source_print
&& !sal
.symtab
)
871 do_gdb_disassembly (get_frame_arch (frame
), 1,
872 get_frame_pc (frame
), get_frame_pc (frame
) + 1);
874 if (source_print
&& sal
.symtab
)
877 int mid_statement
= ((print_what
== SRC_LINE
)
878 && frame_show_address (frame
, sal
));
880 if (annotation_level
)
881 done
= identify_source_line (sal
.symtab
, sal
.line
, mid_statement
,
882 get_frame_pc (frame
));
885 if (deprecated_print_frame_info_listing_hook
)
886 deprecated_print_frame_info_listing_hook (sal
.symtab
,
891 struct value_print_options opts
;
893 get_user_print_options (&opts
);
894 /* We used to do this earlier, but that is clearly
895 wrong. This function is used by many different
896 parts of gdb, including normal_stop in infrun.c,
897 which uses this to print out the current PC
898 when we stepi/nexti into the middle of a source
899 line. Only the command line really wants this
900 behavior. Other UIs probably would like the
901 ability to decide for themselves if it is desired. */
902 if (opts
.addressprint
&& mid_statement
)
904 uiout
->field_core_addr ("addr",
905 gdbarch
, get_frame_pc (frame
));
909 print_source_lines (sal
.symtab
, sal
.line
, sal
.line
+ 1, 0);
913 /* If disassemble-next-line is set to on and there is line debug
914 messages, output assembly codes for next line. */
915 if (disassemble_next_line
== AUTO_BOOLEAN_TRUE
)
916 do_gdb_disassembly (get_frame_arch (frame
), -1, sal
.pc
, sal
.end
);
923 if (get_frame_pc_if_available (frame
, &pc
))
924 set_last_displayed_sal (1, sal
.pspace
, pc
, sal
.symtab
, sal
.line
);
926 set_last_displayed_sal (0, 0, 0, 0, 0);
929 annotate_frame_end ();
931 gdb_flush (gdb_stdout
);
934 /* Remember the last symtab and line we displayed, which we use e.g.
935 * as the place to put a breakpoint when the `break' command is
936 * invoked with no arguments. */
939 set_last_displayed_sal (int valid
, struct program_space
*pspace
,
940 CORE_ADDR addr
, struct symtab
*symtab
,
943 last_displayed_sal_valid
= valid
;
944 last_displayed_pspace
= pspace
;
945 last_displayed_addr
= addr
;
946 last_displayed_symtab
= symtab
;
947 last_displayed_line
= line
;
948 if (valid
&& pspace
== NULL
)
950 clear_last_displayed_sal ();
951 internal_error (__FILE__
, __LINE__
,
952 _("Trying to set NULL pspace."));
956 /* Forget the last sal we displayed. */
959 clear_last_displayed_sal (void)
961 last_displayed_sal_valid
= 0;
962 last_displayed_pspace
= 0;
963 last_displayed_addr
= 0;
964 last_displayed_symtab
= 0;
965 last_displayed_line
= 0;
968 /* Is our record of the last sal we displayed valid? If not,
969 * the get_last_displayed_* functions will return NULL or 0, as
973 last_displayed_sal_is_valid (void)
975 return last_displayed_sal_valid
;
978 /* Get the pspace of the last sal we displayed, if it's valid. */
980 struct program_space
*
981 get_last_displayed_pspace (void)
983 if (last_displayed_sal_valid
)
984 return last_displayed_pspace
;
988 /* Get the address of the last sal we displayed, if it's valid. */
991 get_last_displayed_addr (void)
993 if (last_displayed_sal_valid
)
994 return last_displayed_addr
;
998 /* Get the symtab of the last sal we displayed, if it's valid. */
1001 get_last_displayed_symtab (void)
1003 if (last_displayed_sal_valid
)
1004 return last_displayed_symtab
;
1008 /* Get the line of the last sal we displayed, if it's valid. */
1011 get_last_displayed_line (void)
1013 if (last_displayed_sal_valid
)
1014 return last_displayed_line
;
1018 /* Get the last sal we displayed, if it's valid. */
1021 get_last_displayed_sal ()
1023 symtab_and_line sal
;
1025 if (last_displayed_sal_valid
)
1027 sal
.pspace
= last_displayed_pspace
;
1028 sal
.pc
= last_displayed_addr
;
1029 sal
.symtab
= last_displayed_symtab
;
1030 sal
.line
= last_displayed_line
;
1037 /* Attempt to obtain the name, FUNLANG and optionally FUNCP of the function
1038 corresponding to FRAME. */
1040 gdb::unique_xmalloc_ptr
<char>
1041 find_frame_funname (struct frame_info
*frame
, enum language
*funlang
,
1042 struct symbol
**funcp
)
1044 struct symbol
*func
;
1045 gdb::unique_xmalloc_ptr
<char> funname
;
1047 *funlang
= language_unknown
;
1051 func
= get_frame_function (frame
);
1054 /* In certain pathological cases, the symtabs give the wrong
1055 function (when we are in the first function in a file which
1056 is compiled without debugging symbols, the previous function
1057 is compiled with debugging symbols, and the "foo.o" symbol
1058 that is supposed to tell us where the file with debugging
1059 symbols ends has been truncated by ar because it is longer
1060 than 15 characters). This also occurs if the user uses asm()
1061 to create a function but not stabs for it (in a file compiled
1064 So look in the minimal symbol tables as well, and if it comes
1065 up with a larger address for the function use that instead.
1066 I don't think this can ever cause any problems; there
1067 shouldn't be any minimal symbols in the middle of a function;
1068 if this is ever changed many parts of GDB will need to be
1069 changed (and we'll create a find_pc_minimal_function or some
1072 struct bound_minimal_symbol msymbol
;
1074 /* Don't attempt to do this for inlined functions, which do not
1075 have a corresponding minimal symbol. */
1076 if (!block_inlined_p (SYMBOL_BLOCK_VALUE (func
)))
1078 = lookup_minimal_symbol_by_pc (get_frame_address_in_block (frame
));
1080 memset (&msymbol
, 0, sizeof (msymbol
));
1082 if (msymbol
.minsym
!= NULL
1083 && (BMSYMBOL_VALUE_ADDRESS (msymbol
)
1084 > BLOCK_ENTRY_PC (SYMBOL_BLOCK_VALUE (func
))))
1086 /* We also don't know anything about the function besides
1087 its address and name. */
1089 funname
.reset (xstrdup (MSYMBOL_PRINT_NAME (msymbol
.minsym
)));
1090 *funlang
= MSYMBOL_LANGUAGE (msymbol
.minsym
);
1094 const char *print_name
= SYMBOL_PRINT_NAME (func
);
1096 *funlang
= SYMBOL_LANGUAGE (func
);
1099 if (*funlang
== language_cplus
)
1101 /* It seems appropriate to use SYMBOL_PRINT_NAME() here,
1102 to display the demangled name that we already have
1103 stored in the symbol table, but we stored a version
1104 with DMGL_PARAMS turned on, and here we don't want to
1105 display parameters. So remove the parameters. */
1106 funname
= cp_remove_params (print_name
);
1109 /* If we didn't hit the C++ case above, set *funname
1111 if (funname
== NULL
)
1112 funname
.reset (xstrdup (print_name
));
1117 struct bound_minimal_symbol msymbol
;
1120 if (!get_frame_address_in_block_if_available (frame
, &pc
))
1123 msymbol
= lookup_minimal_symbol_by_pc (pc
);
1124 if (msymbol
.minsym
!= NULL
)
1126 funname
.reset (xstrdup (MSYMBOL_PRINT_NAME (msymbol
.minsym
)));
1127 *funlang
= MSYMBOL_LANGUAGE (msymbol
.minsym
);
1135 print_frame (struct frame_info
*frame
, int print_level
,
1136 enum print_what print_what
, int print_args
,
1137 struct symtab_and_line sal
)
1139 struct gdbarch
*gdbarch
= get_frame_arch (frame
);
1140 struct ui_out
*uiout
= current_uiout
;
1141 enum language funlang
= language_unknown
;
1142 struct value_print_options opts
;
1143 struct symbol
*func
;
1147 pc_p
= get_frame_pc_if_available (frame
, &pc
);
1149 gdb::unique_xmalloc_ptr
<char> funname
1150 = find_frame_funname (frame
, &funlang
, &func
);
1152 annotate_frame_begin (print_level
? frame_relative_level (frame
) : 0,
1156 ui_out_emit_tuple
tuple_emitter (uiout
, "frame");
1161 uiout
->field_fmt_int (2, ui_left
, "level",
1162 frame_relative_level (frame
));
1164 get_user_print_options (&opts
);
1165 if (opts
.addressprint
)
1167 || frame_show_address (frame
, sal
)
1168 || print_what
== LOC_AND_ADDRESS
)
1170 annotate_frame_address ();
1172 uiout
->field_core_addr ("addr", gdbarch
, pc
);
1174 uiout
->field_string ("addr", "<unavailable>");
1175 annotate_frame_address_end ();
1176 uiout
->text (" in ");
1178 annotate_frame_function_name ();
1181 fprintf_symbol_filtered (&stb
, funname
? funname
.get () : "??",
1182 funlang
, DMGL_ANSI
);
1183 uiout
->field_stream ("func", stb
);
1184 uiout
->wrap_hint (" ");
1185 annotate_frame_args ();
1192 if (gdbarch_frame_num_args_p (gdbarch
))
1194 numargs
= gdbarch_frame_num_args (gdbarch
, frame
);
1195 gdb_assert (numargs
>= 0);
1201 ui_out_emit_list
list_emitter (uiout
, "args");
1204 print_frame_args (func
, frame
, numargs
, gdb_stdout
);
1206 CATCH (e
, RETURN_MASK_ERROR
)
1211 /* FIXME: ARGS must be a list. If one argument is a string it
1212 will have " that will not be properly escaped. */
1219 const char *filename_display
;
1221 filename_display
= symtab_to_filename_for_display (sal
.symtab
);
1222 annotate_frame_source_begin ();
1223 uiout
->wrap_hint (" ");
1224 uiout
->text (" at ");
1225 annotate_frame_source_file ();
1226 uiout
->field_string ("file", filename_display
);
1227 if (uiout
->is_mi_like_p ())
1229 const char *fullname
= symtab_to_fullname (sal
.symtab
);
1231 uiout
->field_string ("fullname", fullname
);
1233 annotate_frame_source_file_end ();
1235 annotate_frame_source_line ();
1236 uiout
->field_int ("line", sal
.line
);
1237 annotate_frame_source_end ();
1240 if (pc_p
&& (funname
== NULL
|| sal
.symtab
== NULL
))
1242 char *lib
= solib_name_from_address (get_frame_program_space (frame
),
1243 get_frame_pc (frame
));
1247 annotate_frame_where ();
1248 uiout
->wrap_hint (" ");
1249 uiout
->text (" from ");
1250 uiout
->field_string ("from", lib
);
1253 if (uiout
->is_mi_like_p ())
1254 uiout
->field_string ("arch",
1255 (gdbarch_bfd_arch_info (gdbarch
))->printable_name
);
1262 /* Completion function for "frame function", "info frame function", and
1263 "select-frame function" commands. */
1266 frame_selection_by_function_completer (struct cmd_list_element
*ignore
,
1267 completion_tracker
&tracker
,
1268 const char *text
, const char *word
)
1270 /* This is used to complete function names within a stack. It would be
1271 nice if we only offered functions that were actually in the stack.
1272 However, this would mean unwinding the stack to completion, which
1273 could take too long, or on a corrupted stack, possibly not end.
1274 Instead, we offer all symbol names as a safer choice. */
1275 collect_symbol_completion_matches (tracker
,
1276 complete_symbol_mode::EXPRESSION
,
1277 symbol_name_match_type::EXPRESSION
,
1281 /* Core of all the "info frame" sub-commands. Print information about a
1282 frame FI. If SELECTED_FRAME_P is true then the user didn't provide a
1283 frame specification, they just entered 'info frame'. If the user did
1284 provide a frame specification (for example 'info frame 0', 'info frame
1285 level 1') then SELECTED_FRAME_P will be false. */
1288 info_frame_command_core (struct frame_info
*fi
, bool selected_frame_p
)
1290 struct symbol
*func
;
1292 struct frame_info
*calling_frame_info
;
1294 const char *funname
= 0;
1295 enum language funlang
= language_unknown
;
1296 const char *pc_regname
;
1297 struct gdbarch
*gdbarch
;
1300 /* Initialize it to avoid "may be used uninitialized" warning. */
1301 CORE_ADDR caller_pc
= 0;
1302 int caller_pc_p
= 0;
1304 gdbarch
= get_frame_arch (fi
);
1306 /* Name of the value returned by get_frame_pc(). Per comments, "pc"
1307 is not a good name. */
1308 if (gdbarch_pc_regnum (gdbarch
) >= 0)
1309 /* OK, this is weird. The gdbarch_pc_regnum hardware register's value can
1310 easily not match that of the internal value returned by
1312 pc_regname
= gdbarch_register_name (gdbarch
, gdbarch_pc_regnum (gdbarch
));
1314 /* But then, this is weird to. Even without gdbarch_pc_regnum, an
1315 architectures will often have a hardware register called "pc",
1316 and that register's value, again, can easily not match
1320 frame_pc_p
= get_frame_pc_if_available (fi
, &frame_pc
);
1321 func
= get_frame_function (fi
);
1322 symtab_and_line sal
= find_frame_sal (fi
);
1324 gdb::unique_xmalloc_ptr
<char> func_only
;
1327 funname
= SYMBOL_PRINT_NAME (func
);
1328 funlang
= SYMBOL_LANGUAGE (func
);
1329 if (funlang
== language_cplus
)
1331 /* It seems appropriate to use SYMBOL_PRINT_NAME() here,
1332 to display the demangled name that we already have
1333 stored in the symbol table, but we stored a version
1334 with DMGL_PARAMS turned on, and here we don't want to
1335 display parameters. So remove the parameters. */
1336 func_only
= cp_remove_params (funname
);
1339 funname
= func_only
.get ();
1342 else if (frame_pc_p
)
1344 struct bound_minimal_symbol msymbol
;
1346 msymbol
= lookup_minimal_symbol_by_pc (frame_pc
);
1347 if (msymbol
.minsym
!= NULL
)
1349 funname
= MSYMBOL_PRINT_NAME (msymbol
.minsym
);
1350 funlang
= MSYMBOL_LANGUAGE (msymbol
.minsym
);
1353 calling_frame_info
= get_prev_frame (fi
);
1355 if (selected_frame_p
&& frame_relative_level (fi
) >= 0)
1357 printf_filtered (_("Stack level %d, frame at "),
1358 frame_relative_level (fi
));
1362 printf_filtered (_("Stack frame at "));
1364 fputs_filtered (paddress (gdbarch
, get_frame_base (fi
)), gdb_stdout
);
1365 printf_filtered (":\n");
1366 printf_filtered (" %s = ", pc_regname
);
1368 fputs_filtered (paddress (gdbarch
, get_frame_pc (fi
)), gdb_stdout
);
1370 fputs_filtered ("<unavailable>", gdb_stdout
);
1375 printf_filtered (" in ");
1376 fprintf_symbol_filtered (gdb_stdout
, funname
, funlang
,
1377 DMGL_ANSI
| DMGL_PARAMS
);
1381 printf_filtered (" (%s:%d)", symtab_to_filename_for_display (sal
.symtab
),
1383 puts_filtered ("; ");
1385 printf_filtered ("saved %s = ", pc_regname
);
1387 if (!frame_id_p (frame_unwind_caller_id (fi
)))
1388 val_print_not_saved (gdb_stdout
);
1393 caller_pc
= frame_unwind_caller_pc (fi
);
1396 CATCH (ex
, RETURN_MASK_ERROR
)
1400 case NOT_AVAILABLE_ERROR
:
1401 val_print_unavailable (gdb_stdout
);
1403 case OPTIMIZED_OUT_ERROR
:
1404 val_print_not_saved (gdb_stdout
);
1407 fprintf_filtered (gdb_stdout
, _("<error: %s>"), ex
.message
);
1415 fputs_filtered (paddress (gdbarch
, caller_pc
), gdb_stdout
);
1416 printf_filtered ("\n");
1418 if (calling_frame_info
== NULL
)
1420 enum unwind_stop_reason reason
;
1422 reason
= get_frame_unwind_stop_reason (fi
);
1423 if (reason
!= UNWIND_NO_REASON
)
1424 printf_filtered (_(" Outermost frame: %s\n"),
1425 frame_stop_reason_string (fi
));
1427 else if (get_frame_type (fi
) == TAILCALL_FRAME
)
1428 puts_filtered (" tail call frame");
1429 else if (get_frame_type (fi
) == INLINE_FRAME
)
1430 printf_filtered (" inlined into frame %d",
1431 frame_relative_level (get_prev_frame (fi
)));
1434 printf_filtered (" called by frame at ");
1435 fputs_filtered (paddress (gdbarch
, get_frame_base (calling_frame_info
)),
1438 if (get_next_frame (fi
) && calling_frame_info
)
1439 puts_filtered (",");
1441 if (get_next_frame (fi
))
1443 printf_filtered (" caller of frame at ");
1444 fputs_filtered (paddress (gdbarch
, get_frame_base (get_next_frame (fi
))),
1447 if (get_next_frame (fi
) || calling_frame_info
)
1448 puts_filtered ("\n");
1451 printf_filtered (" source language %s.\n",
1452 language_str (s
->language
));
1455 /* Address of the argument list for this frame, or 0. */
1456 CORE_ADDR arg_list
= get_frame_args_address (fi
);
1457 /* Number of args for this frame, or -1 if unknown. */
1461 printf_filtered (" Arglist at unknown address.\n");
1464 printf_filtered (" Arglist at ");
1465 fputs_filtered (paddress (gdbarch
, arg_list
), gdb_stdout
);
1466 printf_filtered (",");
1468 if (!gdbarch_frame_num_args_p (gdbarch
))
1471 puts_filtered (" args: ");
1475 numargs
= gdbarch_frame_num_args (gdbarch
, fi
);
1476 gdb_assert (numargs
>= 0);
1478 puts_filtered (" no args.");
1479 else if (numargs
== 1)
1480 puts_filtered (" 1 arg: ");
1482 printf_filtered (" %d args: ", numargs
);
1484 print_frame_args (func
, fi
, numargs
, gdb_stdout
);
1485 puts_filtered ("\n");
1489 /* Address of the local variables for this frame, or 0. */
1490 CORE_ADDR arg_list
= get_frame_locals_address (fi
);
1493 printf_filtered (" Locals at unknown address,");
1496 printf_filtered (" Locals at ");
1497 fputs_filtered (paddress (gdbarch
, arg_list
), gdb_stdout
);
1498 printf_filtered (",");
1502 /* Print as much information as possible on the location of all the
1508 int sp_regnum
= gdbarch_sp_regnum (gdbarch
);
1510 /* The sp is special; what's displayed isn't the save address, but
1511 the value of the previous frame's sp. This is a legacy thing,
1512 at one stage the frame cached the previous frame's SP instead
1513 of its address, hence it was easiest to just display the cached
1517 struct value
*value
= frame_unwind_register_value (fi
, sp_regnum
);
1518 gdb_assert (value
!= NULL
);
1520 if (!value_optimized_out (value
) && value_entirely_available (value
))
1522 if (VALUE_LVAL (value
) == not_lval
)
1525 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
1526 int sp_size
= register_size (gdbarch
, sp_regnum
);
1528 sp
= extract_unsigned_integer (value_contents_all (value
),
1529 sp_size
, byte_order
);
1531 printf_filtered (" Previous frame's sp is ");
1532 fputs_filtered (paddress (gdbarch
, sp
), gdb_stdout
);
1533 printf_filtered ("\n");
1535 else if (VALUE_LVAL (value
) == lval_memory
)
1537 printf_filtered (" Previous frame's sp at ");
1538 fputs_filtered (paddress (gdbarch
, value_address (value
)),
1540 printf_filtered ("\n");
1542 else if (VALUE_LVAL (value
) == lval_register
)
1544 printf_filtered (" Previous frame's sp in %s\n",
1545 gdbarch_register_name (gdbarch
,
1546 VALUE_REGNUM (value
)));
1549 release_value (value
);
1552 /* else keep quiet. */
1556 numregs
= gdbarch_num_cooked_regs (gdbarch
);
1557 for (i
= 0; i
< numregs
; i
++)
1559 && gdbarch_register_reggroup_p (gdbarch
, i
, all_reggroup
))
1561 enum lval_type lval
;
1567 /* Find out the location of the saved register without
1568 fetching the corresponding value. */
1569 frame_register_unwind (fi
, i
, &optimized
, &unavailable
,
1570 &lval
, &addr
, &realnum
, NULL
);
1571 /* For moment, only display registers that were saved on the
1573 if (!optimized
&& !unavailable
&& lval
== lval_memory
)
1576 puts_filtered (" Saved registers:\n ");
1578 puts_filtered (",");
1580 printf_filtered (" %s at ",
1581 gdbarch_register_name (gdbarch
, i
));
1582 fputs_filtered (paddress (gdbarch
, addr
), gdb_stdout
);
1586 if (count
|| need_nl
)
1587 puts_filtered ("\n");
1591 /* Return the innermost frame at level LEVEL. */
1593 static struct frame_info
*
1594 leading_innermost_frame (int level
)
1596 struct frame_info
*leading
;
1598 leading
= get_current_frame ();
1600 gdb_assert (level
>= 0);
1602 while (leading
!= nullptr && level
)
1605 leading
= get_prev_frame (leading
);
1612 /* Return the starting frame needed to handle COUNT outermost frames. */
1614 static struct frame_info
*
1615 trailing_outermost_frame (int count
)
1617 struct frame_info
*current
;
1618 struct frame_info
*trailing
;
1620 trailing
= get_current_frame ();
1622 gdb_assert (count
> 0);
1625 while (current
!= nullptr && count
--)
1628 current
= get_prev_frame (current
);
1631 /* Will stop when CURRENT reaches the top of the stack.
1632 TRAILING will be COUNT below it. */
1633 while (current
!= nullptr)
1636 trailing
= get_prev_frame (trailing
);
1637 current
= get_prev_frame (current
);
1643 /* The core of all the "select-frame" sub-commands. Just wraps a call to
1647 select_frame_command_core (struct frame_info
*fi
, bool ignored
)
1649 struct frame_info
*prev_frame
= get_selected_frame_if_set ();
1651 if (get_selected_frame_if_set () != prev_frame
)
1652 gdb::observers::user_selected_context_changed
.notify (USER_SELECTED_FRAME
);
1658 select_frame_for_mi (struct frame_info
*fi
)
1660 select_frame_command_core (fi
, FALSE
/* Ignored. */);
1663 /* The core of all the "frame" sub-commands. Select frame FI, and if this
1664 means we change frame send out a change notification (otherwise, just
1665 reprint the current frame summary). */
1668 frame_command_core (struct frame_info
*fi
, bool ignored
)
1670 struct frame_info
*prev_frame
= get_selected_frame_if_set ();
1673 if (get_selected_frame_if_set () != prev_frame
)
1674 gdb::observers::user_selected_context_changed
.notify (USER_SELECTED_FRAME
);
1676 print_selected_thread_frame (current_uiout
, USER_SELECTED_FRAME
);
1679 /* The three commands 'frame', 'select-frame', and 'info frame' all have a
1680 common set of sub-commands that allow a specific frame to be selected.
1681 All of the sub-command functions are static methods within this class
1682 template which is then instantiated below. The template parameter is a
1683 callback used to implement the functionality of the base command
1684 ('frame', 'select-frame', or 'info frame').
1686 In the template parameter FI is the frame being selected. The
1687 SELECTED_FRAME_P flag is true if the frame being selected was done by
1688 default, which happens when the user uses the base command with no
1689 arguments. For example the commands 'info frame', 'select-frame',
1690 'frame' will all cause SELECTED_FRAME_P to be true. In all other cases
1691 SELECTED_FRAME_P is false. */
1693 template <void (*FPTR
) (struct frame_info
*fi
, bool selected_frame_p
)>
1694 class frame_command_helper
1698 /* The "frame level" family of commands. The ARG is an integer that is
1699 the frame's level in the stack. */
1701 level (const char *arg
, int from_tty
)
1703 int level
= value_as_long (parse_and_eval (arg
));
1704 struct frame_info
*fid
1705 = find_relative_frame (get_current_frame (), &level
);
1707 error (_("No frame at level %s."), arg
);
1711 /* The "frame address" family of commands. ARG is a stack-pointer
1712 address for an existing frame. This command does not allow new
1713 frames to be created. */
1716 address (const char *arg
, int from_tty
)
1718 CORE_ADDR addr
= value_as_address (parse_and_eval (arg
));
1719 struct frame_info
*fid
= find_frame_for_address (addr
);
1721 error (_("No frame at address %s."), arg
);
1725 /* The "frame view" family of commands. ARG is one or two addresses and
1726 is used to view a frame that might be outside the current backtrace.
1727 The addresses are stack-pointer address, and (optional) pc-address. */
1730 view (const char *args
, int from_tty
)
1732 struct frame_info
*fid
;
1735 error (_("Missing address argument to view a frame"));
1737 gdb_argv
argv (args
);
1739 if (argv
.count () == 2)
1743 addr
[0] = value_as_address (parse_and_eval (argv
[0]));
1744 addr
[1] = value_as_address (parse_and_eval (argv
[1]));
1745 fid
= create_new_frame (addr
[0], addr
[1]);
1749 CORE_ADDR addr
= value_as_address (parse_and_eval (argv
[0]));
1750 fid
= create_new_frame (addr
, false);
1755 /* The "frame function" family of commands. ARG is the name of a
1756 function within the stack, the first function (searching from frame
1757 0) with that name will be selected. */
1760 function (const char *arg
, int from_tty
)
1763 error (_("Missing function name argument"));
1764 struct frame_info
*fid
= find_frame_for_function (arg
);
1766 error (_("No frame for function \"%s\"."), arg
);
1770 /* The "frame" base command, that is, when no sub-command is specified.
1771 If one argument is provided then we assume that this is a frame's
1772 level as historically, this was the supported command syntax that was
1775 If no argument is provided, then the current frame is selected. */
1778 base_command (const char *arg
, int from_tty
)
1781 FPTR (get_selected_frame (_("No stack.")), true);
1783 level (arg
, from_tty
);
1787 /* Instantiate three FRAME_COMMAND_HELPER instances to implement the
1788 sub-commands for 'info frame', 'frame', and 'select-frame' commands. */
1790 static frame_command_helper
<info_frame_command_core
> info_frame_cmd
;
1791 static frame_command_helper
<frame_command_core
> frame_cmd
;
1792 static frame_command_helper
<select_frame_command_core
> select_frame_cmd
;
1794 /* Print briefly all stack frames or just the innermost COUNT_EXP
1798 backtrace_command_1 (const char *count_exp
, frame_filter_flags flags
,
1799 int no_filters
, int from_tty
)
1801 struct frame_info
*fi
;
1803 int py_start
= 0, py_end
= 0;
1804 enum ext_lang_bt_status result
= EXT_LANG_BT_ERROR
;
1806 if (!target_has_stack
)
1807 error (_("No stack."));
1811 count
= parse_and_eval_long (count_exp
);
1817 /* The argument to apply_ext_lang_frame_filter is the number
1818 of the final frame to print, and frames start at 0. */
1830 enum ext_lang_frame_args arg_type
;
1832 flags
|= PRINT_LEVEL
| PRINT_FRAME_INFO
| PRINT_ARGS
;
1834 flags
|= PRINT_MORE_FRAMES
;
1836 if (!strcmp (print_frame_arguments
, "scalars"))
1837 arg_type
= CLI_SCALAR_VALUES
;
1838 else if (!strcmp (print_frame_arguments
, "all"))
1839 arg_type
= CLI_ALL_VALUES
;
1841 arg_type
= NO_VALUES
;
1843 result
= apply_ext_lang_frame_filter (get_current_frame (), flags
,
1844 arg_type
, current_uiout
,
1848 /* Run the inbuilt backtrace if there are no filters registered, or
1849 "no-filters" has been specified from the command. */
1850 if (no_filters
|| result
== EXT_LANG_BT_NO_FILTERS
)
1852 struct frame_info
*trailing
;
1854 /* The following code must do two things. First, it must set the
1855 variable TRAILING to the frame from which we should start
1856 printing. Second, it must set the variable count to the number
1857 of frames which we should print, or -1 if all of them. */
1859 if (count_exp
!= NULL
&& count
< 0)
1861 trailing
= trailing_outermost_frame (-count
);
1865 trailing
= get_current_frame ();
1867 for (fi
= trailing
; fi
&& count
--; fi
= get_prev_frame (fi
))
1871 /* Don't use print_stack_frame; if an error() occurs it probably
1872 means further attempts to backtrace would fail (on the other
1873 hand, perhaps the code does or could be fixed to make sure
1874 the frame->prev field gets set to NULL in that case). */
1876 print_frame_info (fi
, 1, LOCATION
, 1, 0);
1877 if ((flags
& PRINT_LOCALS
) != 0)
1879 struct frame_id frame_id
= get_frame_id (fi
);
1881 print_frame_local_vars (fi
, 1, gdb_stdout
);
1883 /* print_frame_local_vars invalidates FI. */
1884 fi
= frame_find_by_id (frame_id
);
1888 warning (_("Unable to restore previously selected frame."));
1893 /* Save the last frame to check for error conditions. */
1897 /* If we've stopped before the end, mention that. */
1899 printf_filtered (_("(More stack frames follow...)\n"));
1901 /* If we've run out of frames, and the reason appears to be an error
1902 condition, print it. */
1903 if (fi
== NULL
&& trailing
!= NULL
)
1905 enum unwind_stop_reason reason
;
1907 reason
= get_frame_unwind_stop_reason (trailing
);
1908 if (reason
>= UNWIND_FIRST_ERROR
)
1909 printf_filtered (_("Backtrace stopped: %s\n"),
1910 frame_stop_reason_string (trailing
));
1916 backtrace_command (const char *arg
, int from_tty
)
1918 bool filters
= true;
1919 frame_filter_flags flags
= 0;
1927 const char *save_arg
= arg
;
1928 std::string this_arg
= extract_arg (&arg
);
1930 if (this_arg
.empty ())
1933 if (subset_compare (this_arg
.c_str (), "no-filters"))
1935 else if (subset_compare (this_arg
.c_str (), "full"))
1936 flags
|= PRINT_LOCALS
;
1937 else if (subset_compare (this_arg
.c_str (), "hide"))
1938 flags
|= PRINT_HIDE
;
1941 /* Not a recognized argument, so stop. */
1951 backtrace_command_1 (arg
, flags
, !filters
/* no frame-filters */, from_tty
);
1954 /* Iterate over the local variables of a block B, calling CB with
1958 iterate_over_block_locals (const struct block
*b
,
1959 iterate_over_block_arg_local_vars_cb cb
,
1962 struct block_iterator iter
;
1965 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
1967 switch (SYMBOL_CLASS (sym
))
1973 case LOC_OPTIMIZED_OUT
:
1974 if (SYMBOL_IS_ARGUMENT (sym
))
1976 if (SYMBOL_DOMAIN (sym
) == COMMON_BLOCK_DOMAIN
)
1978 (*cb
) (SYMBOL_PRINT_NAME (sym
), sym
, cb_data
);
1982 /* Ignore symbols which are not locals. */
1989 /* Same, but print labels. */
1992 /* Commented out, as the code using this function has also been
1993 commented out. FIXME:brobecker/2009-01-13: Find out why the code
1994 was commented out in the first place. The discussion introducing
1995 this change (2007-12-04: Support lexical blocks and function bodies
1996 that occupy non-contiguous address ranges) did not explain why
1997 this change was made. */
1999 print_block_frame_labels (struct gdbarch
*gdbarch
, struct block
*b
,
2000 int *have_default
, struct ui_file
*stream
)
2002 struct block_iterator iter
;
2004 int values_printed
= 0;
2006 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
2008 if (strcmp (SYMBOL_LINKAGE_NAME (sym
), "default") == 0)
2014 if (SYMBOL_CLASS (sym
) == LOC_LABEL
)
2016 struct symtab_and_line sal
;
2017 struct value_print_options opts
;
2019 sal
= find_pc_line (SYMBOL_VALUE_ADDRESS (sym
), 0);
2021 fputs_filtered (SYMBOL_PRINT_NAME (sym
), stream
);
2022 get_user_print_options (&opts
);
2023 if (opts
.addressprint
)
2025 fprintf_filtered (stream
, " ");
2026 fputs_filtered (paddress (gdbarch
, SYMBOL_VALUE_ADDRESS (sym
)),
2029 fprintf_filtered (stream
, " in file %s, line %d\n",
2030 sal
.symtab
->filename
, sal
.line
);
2034 return values_printed
;
2038 /* Iterate over all the local variables in block B, including all its
2039 superblocks, stopping when the top-level block is reached. */
2042 iterate_over_block_local_vars (const struct block
*block
,
2043 iterate_over_block_arg_local_vars_cb cb
,
2048 iterate_over_block_locals (block
, cb
, cb_data
);
2049 /* After handling the function's top-level block, stop. Don't
2050 continue to its superblock, the block of per-file
2052 if (BLOCK_FUNCTION (block
))
2054 block
= BLOCK_SUPERBLOCK (block
);
2058 /* Data to be passed around in the calls to the locals and args
2061 struct print_variable_and_value_data
2063 struct frame_id frame_id
;
2065 struct ui_file
*stream
;
2069 /* The callback for the locals and args iterators. */
2072 do_print_variable_and_value (const char *print_name
,
2076 struct print_variable_and_value_data
*p
2077 = (struct print_variable_and_value_data
*) cb_data
;
2078 struct frame_info
*frame
;
2080 frame
= frame_find_by_id (p
->frame_id
);
2083 warning (_("Unable to restore previously selected frame."));
2087 print_variable_and_value (print_name
, sym
, frame
, p
->stream
, p
->num_tabs
);
2089 /* print_variable_and_value invalidates FRAME. */
2092 p
->values_printed
= 1;
2095 /* Print all variables from the innermost up to the function block of FRAME.
2096 Print them with values to STREAM indented by NUM_TABS.
2098 This function will invalidate FRAME. */
2101 print_frame_local_vars (struct frame_info
*frame
, int num_tabs
,
2102 struct ui_file
*stream
)
2104 struct print_variable_and_value_data cb_data
;
2105 const struct block
*block
;
2108 if (!get_frame_pc_if_available (frame
, &pc
))
2110 fprintf_filtered (stream
,
2111 _("PC unavailable, cannot determine locals.\n"));
2115 block
= get_frame_block (frame
, 0);
2118 fprintf_filtered (stream
, "No symbol table info available.\n");
2122 cb_data
.frame_id
= get_frame_id (frame
);
2123 cb_data
.num_tabs
= 4 * num_tabs
;
2124 cb_data
.stream
= stream
;
2125 cb_data
.values_printed
= 0;
2127 /* Temporarily change the selected frame to the given FRAME.
2128 This allows routines that rely on the selected frame instead
2129 of being given a frame as parameter to use the correct frame. */
2130 scoped_restore_selected_frame restore_selected_frame
;
2131 select_frame (frame
);
2133 iterate_over_block_local_vars (block
,
2134 do_print_variable_and_value
,
2137 if (!cb_data
.values_printed
)
2138 fprintf_filtered (stream
, _("No locals.\n"));
2142 info_locals_command (const char *args
, int from_tty
)
2144 print_frame_local_vars (get_selected_frame (_("No frame selected.")),
2148 /* Iterate over all the argument variables in block B. */
2151 iterate_over_block_arg_vars (const struct block
*b
,
2152 iterate_over_block_arg_local_vars_cb cb
,
2155 struct block_iterator iter
;
2156 struct symbol
*sym
, *sym2
;
2158 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
2160 /* Don't worry about things which aren't arguments. */
2161 if (SYMBOL_IS_ARGUMENT (sym
))
2163 /* We have to look up the symbol because arguments can have
2164 two entries (one a parameter, one a local) and the one we
2165 want is the local, which lookup_symbol will find for us.
2166 This includes gcc1 (not gcc2) on the sparc when passing a
2167 small structure and gcc2 when the argument type is float
2168 and it is passed as a double and converted to float by
2169 the prologue (in the latter case the type of the LOC_ARG
2170 symbol is double and the type of the LOC_LOCAL symbol is
2171 float). There are also LOC_ARG/LOC_REGISTER pairs which
2172 are not combined in symbol-reading. */
2174 sym2
= lookup_symbol_search_name (SYMBOL_SEARCH_NAME (sym
),
2175 b
, VAR_DOMAIN
).symbol
;
2176 (*cb
) (SYMBOL_PRINT_NAME (sym
), sym2
, cb_data
);
2181 /* Print all argument variables of the function of FRAME.
2182 Print them with values to STREAM.
2184 This function will invalidate FRAME. */
2187 print_frame_arg_vars (struct frame_info
*frame
, struct ui_file
*stream
)
2189 struct print_variable_and_value_data cb_data
;
2190 struct symbol
*func
;
2193 if (!get_frame_pc_if_available (frame
, &pc
))
2195 fprintf_filtered (stream
, _("PC unavailable, cannot determine args.\n"));
2199 func
= get_frame_function (frame
);
2202 fprintf_filtered (stream
, _("No symbol table info available.\n"));
2206 cb_data
.frame_id
= get_frame_id (frame
);
2207 cb_data
.num_tabs
= 0;
2208 cb_data
.stream
= stream
;
2209 cb_data
.values_printed
= 0;
2211 iterate_over_block_arg_vars (SYMBOL_BLOCK_VALUE (func
),
2212 do_print_variable_and_value
, &cb_data
);
2214 /* do_print_variable_and_value invalidates FRAME. */
2217 if (!cb_data
.values_printed
)
2218 fprintf_filtered (stream
, _("No arguments.\n"));
2222 info_args_command (const char *ignore
, int from_tty
)
2224 print_frame_arg_vars (get_selected_frame (_("No frame selected.")),
2228 /* Return the symbol-block in which the selected frame is executing.
2229 Can return zero under various legitimate circumstances.
2231 If ADDR_IN_BLOCK is non-zero, set *ADDR_IN_BLOCK to the relevant
2232 code address within the block returned. We use this to decide
2233 which macros are in scope. */
2235 const struct block
*
2236 get_selected_block (CORE_ADDR
*addr_in_block
)
2238 if (!has_stack_frames ())
2241 return get_frame_block (get_selected_frame (NULL
), addr_in_block
);
2244 /* Find a frame a certain number of levels away from FRAME.
2245 LEVEL_OFFSET_PTR points to an int containing the number of levels.
2246 Positive means go to earlier frames (up); negative, the reverse.
2247 The int that contains the number of levels is counted toward
2248 zero as the frames for those levels are found.
2249 If the top or bottom frame is reached, that frame is returned,
2250 but the final value of *LEVEL_OFFSET_PTR is nonzero and indicates
2251 how much farther the original request asked to go. */
2254 find_relative_frame (struct frame_info
*frame
, int *level_offset_ptr
)
2256 /* Going up is simple: just call get_prev_frame enough times or
2257 until the initial frame is reached. */
2258 while (*level_offset_ptr
> 0)
2260 struct frame_info
*prev
= get_prev_frame (frame
);
2264 (*level_offset_ptr
)--;
2268 /* Going down is just as simple. */
2269 while (*level_offset_ptr
< 0)
2271 struct frame_info
*next
= get_next_frame (frame
);
2275 (*level_offset_ptr
)++;
2282 /* Select the frame up one or COUNT_EXP stack levels from the
2283 previously selected frame, and print it briefly. */
2286 up_silently_base (const char *count_exp
)
2288 struct frame_info
*frame
;
2292 count
= parse_and_eval_long (count_exp
);
2294 frame
= find_relative_frame (get_selected_frame ("No stack."), &count
);
2295 if (count
!= 0 && count_exp
== NULL
)
2296 error (_("Initial frame selected; you cannot go up."));
2297 select_frame (frame
);
2301 up_silently_command (const char *count_exp
, int from_tty
)
2303 up_silently_base (count_exp
);
2307 up_command (const char *count_exp
, int from_tty
)
2309 up_silently_base (count_exp
);
2310 gdb::observers::user_selected_context_changed
.notify (USER_SELECTED_FRAME
);
2313 /* Select the frame down one or COUNT_EXP stack levels from the previously
2314 selected frame, and print it briefly. */
2317 down_silently_base (const char *count_exp
)
2319 struct frame_info
*frame
;
2323 count
= -parse_and_eval_long (count_exp
);
2325 frame
= find_relative_frame (get_selected_frame ("No stack."), &count
);
2326 if (count
!= 0 && count_exp
== NULL
)
2328 /* We only do this if COUNT_EXP is not specified. That way
2329 "down" means to really go down (and let me know if that is
2330 impossible), but "down 9999" can be used to mean go all the
2331 way down without getting an error. */
2333 error (_("Bottom (innermost) frame selected; you cannot go down."));
2336 select_frame (frame
);
2340 down_silently_command (const char *count_exp
, int from_tty
)
2342 down_silently_base (count_exp
);
2346 down_command (const char *count_exp
, int from_tty
)
2348 down_silently_base (count_exp
);
2349 gdb::observers::user_selected_context_changed
.notify (USER_SELECTED_FRAME
);
2353 return_command (const char *retval_exp
, int from_tty
)
2355 /* Initialize it just to avoid a GCC false warning. */
2356 enum return_value_convention rv_conv
= RETURN_VALUE_STRUCT_CONVENTION
;
2357 struct frame_info
*thisframe
;
2358 struct gdbarch
*gdbarch
;
2359 struct symbol
*thisfun
;
2360 struct value
*return_value
= NULL
;
2361 struct value
*function
= NULL
;
2362 const char *query_prefix
= "";
2364 thisframe
= get_selected_frame ("No selected frame.");
2365 thisfun
= get_frame_function (thisframe
);
2366 gdbarch
= get_frame_arch (thisframe
);
2368 if (get_frame_type (get_current_frame ()) == INLINE_FRAME
)
2369 error (_("Can not force return from an inlined function."));
2371 /* Compute the return value. If the computation triggers an error,
2372 let it bail. If the return type can't be handled, set
2373 RETURN_VALUE to NULL, and QUERY_PREFIX to an informational
2377 expression_up retval_expr
= parse_expression (retval_exp
);
2378 struct type
*return_type
= NULL
;
2380 /* Compute the return value. Should the computation fail, this
2381 call throws an error. */
2382 return_value
= evaluate_expression (retval_expr
.get ());
2384 /* Cast return value to the return type of the function. Should
2385 the cast fail, this call throws an error. */
2386 if (thisfun
!= NULL
)
2387 return_type
= TYPE_TARGET_TYPE (SYMBOL_TYPE (thisfun
));
2388 if (return_type
== NULL
)
2390 if (retval_expr
->elts
[0].opcode
!= UNOP_CAST
2391 && retval_expr
->elts
[0].opcode
!= UNOP_CAST_TYPE
)
2392 error (_("Return value type not available for selected "
2394 "Please use an explicit cast of the value to return."));
2395 return_type
= value_type (return_value
);
2397 return_type
= check_typedef (return_type
);
2398 return_value
= value_cast (return_type
, return_value
);
2400 /* Make sure the value is fully evaluated. It may live in the
2401 stack frame we're about to pop. */
2402 if (value_lazy (return_value
))
2403 value_fetch_lazy (return_value
);
2405 if (thisfun
!= NULL
)
2406 function
= read_var_value (thisfun
, NULL
, thisframe
);
2408 rv_conv
= RETURN_VALUE_REGISTER_CONVENTION
;
2409 if (TYPE_CODE (return_type
) == TYPE_CODE_VOID
)
2410 /* If the return-type is "void", don't try to find the
2411 return-value's location. However, do still evaluate the
2412 return expression so that, even when the expression result
2413 is discarded, side effects such as "return i++" still
2415 return_value
= NULL
;
2416 else if (thisfun
!= NULL
)
2418 rv_conv
= struct_return_convention (gdbarch
, function
, return_type
);
2419 if (rv_conv
== RETURN_VALUE_STRUCT_CONVENTION
2420 || rv_conv
== RETURN_VALUE_ABI_RETURNS_ADDRESS
)
2422 query_prefix
= "The location at which to store the "
2423 "function's return value is unknown.\n"
2424 "If you continue, the return value "
2425 "that you specified will be ignored.\n";
2426 return_value
= NULL
;
2431 /* Does an interactive user really want to do this? Include
2432 information, such as how well GDB can handle the return value, in
2433 the query message. */
2438 if (thisfun
== NULL
)
2439 confirmed
= query (_("%sMake selected stack frame return now? "),
2443 if (TYPE_NO_RETURN (thisfun
->type
))
2444 warning (_("Function does not return normally to caller."));
2445 confirmed
= query (_("%sMake %s return now? "), query_prefix
,
2446 SYMBOL_PRINT_NAME (thisfun
));
2449 error (_("Not confirmed"));
2452 /* Discard the selected frame and all frames inner-to it. */
2453 frame_pop (get_selected_frame (NULL
));
2455 /* Store RETURN_VALUE in the just-returned register set. */
2456 if (return_value
!= NULL
)
2458 struct type
*return_type
= value_type (return_value
);
2459 struct gdbarch
*cache_arch
= get_current_regcache ()->arch ();
2461 gdb_assert (rv_conv
!= RETURN_VALUE_STRUCT_CONVENTION
2462 && rv_conv
!= RETURN_VALUE_ABI_RETURNS_ADDRESS
);
2463 gdbarch_return_value (cache_arch
, function
, return_type
,
2464 get_current_regcache (), NULL
/*read*/,
2465 value_contents (return_value
) /*write*/);
2468 /* If we are at the end of a call dummy now, pop the dummy frame
2470 if (get_frame_type (get_current_frame ()) == DUMMY_FRAME
)
2471 frame_pop (get_current_frame ());
2473 select_frame (get_current_frame ());
2474 /* If interactive, print the frame that is now current. */
2476 print_stack_frame (get_selected_frame (NULL
), 1, SRC_AND_LOC
, 1);
2479 /* Find the most inner frame in the current stack for a function called
2480 FUNCTION_NAME. If no matching frame is found return NULL. */
2482 static struct frame_info
*
2483 find_frame_for_function (const char *function_name
)
2485 /* Used to hold the lower and upper addresses for each of the
2486 SYMTAB_AND_LINEs found for functions matching FUNCTION_NAME. */
2487 struct function_bounds
2489 CORE_ADDR low
, high
;
2491 struct frame_info
*frame
;
2495 gdb_assert (function_name
!= NULL
);
2497 frame
= get_current_frame ();
2498 std::vector
<symtab_and_line
> sals
2499 = decode_line_with_current_source (function_name
,
2500 DECODE_LINE_FUNFIRSTLINE
);
2501 gdb::def_vector
<function_bounds
> func_bounds (sals
.size ());
2502 for (size_t i
= 0; i
< sals
.size (); i
++)
2504 if (sals
[i
].pspace
!= current_program_space
)
2505 func_bounds
[i
].low
= func_bounds
[i
].high
= 0;
2506 else if (sals
[i
].pc
== 0
2507 || find_pc_partial_function (sals
[i
].pc
, NULL
,
2508 &func_bounds
[i
].low
,
2509 &func_bounds
[i
].high
) == 0)
2510 func_bounds
[i
].low
= func_bounds
[i
].high
= 0;
2515 for (size_t i
= 0; (i
< sals
.size () && !found
); i
++)
2516 found
= (get_frame_pc (frame
) >= func_bounds
[i
].low
2517 && get_frame_pc (frame
) < func_bounds
[i
].high
);
2521 frame
= find_relative_frame (frame
, &level
);
2524 while (!found
&& level
== 0);
2532 /* Implements the dbx 'func' command. */
2535 func_command (const char *arg
, int from_tty
)
2540 struct frame_info
*frame
= find_frame_for_function (arg
);
2542 error (_("'%s' not within current stack frame."), arg
);
2543 if (frame
!= get_selected_frame (NULL
))
2545 select_frame (frame
);
2546 print_stack_frame (get_selected_frame (NULL
), 1, SRC_AND_LOC
, 1);
2550 /* Apply a GDB command to all stack frames, or a set of identified frames,
2551 or innermost COUNT frames.
2552 With a negative COUNT, apply command on outermost -COUNT frames.
2554 frame apply 3 info frame Apply 'info frame' to frames 0, 1, 2
2555 frame apply -3 info frame Apply 'info frame' to outermost 3 frames.
2556 frame apply all x/i $pc Apply 'x/i $pc' cmd to all frames.
2557 frame apply all -s p local_var_no_idea_in_which_frame
2558 If a frame has a local variable called
2559 local_var_no_idea_in_which_frame, print frame
2560 and value of local_var_no_idea_in_which_frame.
2561 frame apply all -s -q p local_var_no_idea_in_which_frame
2562 Same as before, but only print the variable value.
2563 frame apply level 2-5 0 4-7 -s p i = i + 1
2564 Adds 1 to the variable i in the specified frames.
2565 Note that i will be incremented twice in
2568 /* Apply a GDB command to COUNT stack frames, starting at TRAILING.
2569 CMD starts with 0 or more qcs flags followed by the GDB command to apply.
2570 COUNT -1 means all frames starting at TRAILING. WHICH_COMMAND is used
2571 for error messages. */
2574 frame_apply_command_count (const char *which_command
,
2575 const char *cmd
, int from_tty
,
2576 struct frame_info
*trailing
, int count
)
2579 struct frame_info
*fi
;
2581 while (cmd
!= NULL
&& parse_flags_qcs (which_command
, &cmd
, &flags
))
2584 if (cmd
== NULL
|| *cmd
== '\0')
2585 error (_("Please specify a command to apply on the selected frames"));
2587 /* The below will restore the current inferior/thread/frame.
2588 Usually, only the frame is effectively to be restored.
2589 But in case CMD switches of inferior/thread, better restore
2591 scoped_restore_current_thread restore_thread
;
2593 for (fi
= trailing
; fi
&& count
--; fi
= get_prev_frame (fi
))
2600 std::string cmd_result
;
2602 /* In case CMD switches of inferior/thread/frame, the below
2603 restores the inferior/thread/frame. FI can then be
2604 set to the selected frame. */
2605 scoped_restore_current_thread restore_fi_current_frame
;
2607 cmd_result
= execute_command_to_string (cmd
, from_tty
);
2609 fi
= get_selected_frame (_("frame apply "
2610 "unable to get selected frame."));
2611 if (!flags
.silent
|| cmd_result
.length () > 0)
2614 print_stack_frame (fi
, 1, LOCATION
, 0);
2615 printf_filtered ("%s", cmd_result
.c_str ());
2618 CATCH (ex
, RETURN_MASK_ERROR
)
2620 fi
= get_selected_frame (_("frame apply "
2621 "unable to get selected frame."));
2625 print_stack_frame (fi
, 1, LOCATION
, 0);
2627 printf_filtered ("%s\n", ex
.message
);
2629 throw_exception (ex
);
2636 /* Implementation of the "frame apply level" command. */
2639 frame_apply_level_command (const char *cmd
, int from_tty
)
2641 if (!target_has_stack
)
2642 error (_("No stack."));
2644 bool level_found
= false;
2645 const char *levels_str
= cmd
;
2646 number_or_range_parser
levels (levels_str
);
2648 /* Skip the LEVEL list to find the flags and command args. */
2649 while (!levels
.finished ())
2651 /* Call for effect. */
2652 levels
.get_number ();
2655 if (levels
.in_range ())
2656 levels
.skip_range ();
2660 error (_("Missing or invalid LEVEL... argument"));
2662 cmd
= levels
.cur_tok ();
2664 /* Redo the LEVELS parsing, but applying COMMAND. */
2665 levels
.init (levels_str
);
2666 while (!levels
.finished ())
2668 const int level_beg
= levels
.get_number ();
2671 if (levels
.in_range ())
2673 n_frames
= levels
.end_value () - level_beg
+ 1;
2674 levels
.skip_range ();
2679 frame_apply_command_count ("frame apply level", cmd
, from_tty
,
2680 leading_innermost_frame (level_beg
), n_frames
);
2684 /* Implementation of the "frame apply all" command. */
2687 frame_apply_all_command (const char *cmd
, int from_tty
)
2689 if (!target_has_stack
)
2690 error (_("No stack."));
2692 frame_apply_command_count ("frame apply all", cmd
, from_tty
,
2693 get_current_frame (), INT_MAX
);
2696 /* Implementation of the "frame apply" command. */
2699 frame_apply_command (const char* cmd
, int from_tty
)
2702 struct frame_info
*trailing
;
2704 if (!target_has_stack
)
2705 error (_("No stack."));
2708 error (_("Missing COUNT argument."));
2709 count
= get_number_trailer (&cmd
, 0);
2711 error (_("Invalid COUNT argument."));
2715 trailing
= trailing_outermost_frame (-count
);
2719 trailing
= get_current_frame ();
2721 frame_apply_command_count ("frame apply", cmd
, from_tty
,
2725 /* Implementation of the "faas" command. */
2728 faas_command (const char *cmd
, int from_tty
)
2730 std::string expanded
= std::string ("frame apply all -s ") + cmd
;
2731 execute_command (expanded
.c_str (), from_tty
);
2735 /* Find inner-mode frame with frame address ADDRESS. Return NULL if no
2736 matching frame can be found. */
2738 static struct frame_info
*
2739 find_frame_for_address (CORE_ADDR address
)
2742 struct frame_info
*fid
;
2744 id
= frame_id_build_wild (address
);
2746 /* If (s)he specifies the frame with an address, he deserves
2747 what (s)he gets. Still, give the highest one that matches.
2748 (NOTE: cagney/2004-10-29: Why highest, or outer-most, I don't
2750 for (fid
= get_current_frame ();
2752 fid
= get_prev_frame (fid
))
2754 if (frame_id_eq (id
, get_frame_id (fid
)))
2756 struct frame_info
*prev_frame
;
2760 prev_frame
= get_prev_frame (fid
);
2762 || !frame_id_eq (id
, get_frame_id (prev_frame
)))
2774 /* Commands with a prefix of `frame apply'. */
2775 static struct cmd_list_element
*frame_apply_cmd_list
= NULL
;
2777 /* Commands with a prefix of `frame'. */
2778 static struct cmd_list_element
*frame_cmd_list
= NULL
;
2780 /* Commands with a prefix of `select frame'. */
2781 static struct cmd_list_element
*select_frame_cmd_list
= NULL
;
2783 /* Commands with a prefix of `info frame'. */
2784 static struct cmd_list_element
*info_frame_cmd_list
= NULL
;
2787 _initialize_stack (void)
2789 struct cmd_list_element
*cmd
;
2791 add_com ("return", class_stack
, return_command
, _("\
2792 Make selected stack frame return to its caller.\n\
2793 Control remains in the debugger, but when you continue\n\
2794 execution will resume in the frame above the one now selected.\n\
2795 If an argument is given, it is an expression for the value to return."));
2797 add_com ("up", class_stack
, up_command
, _("\
2798 Select and print stack frame that called this one.\n\
2799 An argument says how many frames up to go."));
2800 add_com ("up-silently", class_support
, up_silently_command
, _("\
2801 Same as the `up' command, but does not print anything.\n\
2802 This is useful in command scripts."));
2804 add_com ("down", class_stack
, down_command
, _("\
2805 Select and print stack frame called by this one.\n\
2806 An argument says how many frames down to go."));
2807 add_com_alias ("do", "down", class_stack
, 1);
2808 add_com_alias ("dow", "down", class_stack
, 1);
2809 add_com ("down-silently", class_support
, down_silently_command
, _("\
2810 Same as the `down' command, but does not print anything.\n\
2811 This is useful in command scripts."));
2813 add_prefix_cmd ("frame", class_stack
,
2814 &frame_cmd
.base_command
, _("\
2815 Select and print a stack frame.\n\
2816 With no argument, print the selected stack frame. (See also \"info frame\").\n\
2817 A single numerical argument specifies the frame to select."),
2818 &frame_cmd_list
, "frame ", 1, &cmdlist
);
2820 add_com_alias ("f", "frame", class_stack
, 1);
2822 #define FRAME_APPLY_FLAGS_HELP "\
2823 Prints the frame location information followed by COMMAND output.\n\
2824 FLAG arguments are -q (quiet), -c (continue), -s (silent).\n\
2825 Flag -q disables printing the frame location information.\n\
2826 By default, if a COMMAND raises an error, frame apply is aborted.\n\
2827 Flag -c indicates to print the error and continue.\n\
2828 Flag -s indicates to silently ignore a COMMAND that raises an error\n\
2829 or produces no output."
2831 add_prefix_cmd ("apply", class_stack
, frame_apply_command
,
2832 _("Apply a command to a number of frames.\n\
2833 Usage: frame apply COUNT [FLAG]... COMMAND\n\
2834 With a negative COUNT argument, applies the command on outermost -COUNT frames.\n"
2835 FRAME_APPLY_FLAGS_HELP
),
2836 &frame_apply_cmd_list
, "frame apply ", 1, &frame_cmd_list
);
2838 add_cmd ("all", class_stack
, frame_apply_all_command
,
2840 Apply a command to all frames.\n\
2842 Usage: frame apply all [FLAG]... COMMAND\n"
2843 FRAME_APPLY_FLAGS_HELP
),
2844 &frame_apply_cmd_list
);
2846 add_cmd ("level", class_stack
, frame_apply_level_command
,
2848 Apply a command to a list of frames.\n\
2850 Usage: frame apply level LEVEL... [FLAG]... COMMAND\n\
2851 ID is a space-separated list of LEVELs of frames to apply COMMAND on.\n"
2852 FRAME_APPLY_FLAGS_HELP
),
2853 &frame_apply_cmd_list
);
2855 add_com ("faas", class_stack
, faas_command
, _("\
2856 Apply a command to all frames (ignoring errors and empty output).\n\
2857 Usage: faas COMMAND\n\
2858 shortcut for 'frame apply all -s COMMAND'"));
2861 add_prefix_cmd ("frame", class_stack
,
2862 &frame_cmd
.base_command
, _("\
2863 Select and print a stack frame.\n\
2864 With no argument, print the selected stack frame. (See also \"info frame\").\n\
2865 A single numerical argument specifies the frame to select."),
2866 &frame_cmd_list
, "frame ", 1, &cmdlist
);
2867 add_com_alias ("f", "frame", class_stack
, 1);
2869 add_cmd ("address", class_stack
, &frame_cmd
.address
,
2871 Select and print a stack frame by stack address\n\
2873 Usage: frame address STACK-ADDRESS"),
2876 add_cmd ("view", class_stack
, &frame_cmd
.view
,
2878 View a stack frame that might be outside the current backtrace.\n\
2880 Usage: frame view STACK-ADDRESS\n\
2881 frame view STACK-ADDRESS PC-ADDRESS"),
2884 cmd
= add_cmd ("function", class_stack
, &frame_cmd
.function
,
2886 Select and print a stack frame by function name.\n\
2888 Usage: frame function NAME\n\
2890 The innermost frame that visited function NAME is selected."),
2892 set_cmd_completer (cmd
, frame_selection_by_function_completer
);
2895 add_cmd ("level", class_stack
, &frame_cmd
.level
,
2897 Select and print a stack frame by level.\n\
2899 Usage: frame level LEVEL"),
2902 cmd
= add_prefix_cmd_suppress_notification ("select-frame", class_stack
,
2903 &select_frame_cmd
.base_command
, _("\
2904 Select a stack frame without printing anything.\n\
2905 A single numerical argument specifies the frame to select."),
2906 &select_frame_cmd_list
, "select-frame ", 1, &cmdlist
,
2907 &cli_suppress_notification
.user_selected_context
);
2909 add_cmd_suppress_notification ("address", class_stack
,
2910 &select_frame_cmd
.address
, _("\
2911 Select a stack frame by stack address.\n\
2913 Usage: select-frame address STACK-ADDRESS"),
2914 &select_frame_cmd_list
,
2915 &cli_suppress_notification
.user_selected_context
);
2918 add_cmd_suppress_notification ("view", class_stack
,
2919 &select_frame_cmd
.view
, _("\
2920 Select a stack frame that might be outside the current backtrace.\n\
2922 Usage: select-frame view STACK-ADDRESS\n\
2923 select-frame view STACK-ADDRESS PC-ADDRESS"),
2924 &select_frame_cmd_list
,
2925 &cli_suppress_notification
.user_selected_context
);
2927 cmd
= add_cmd_suppress_notification ("function", class_stack
,
2928 &select_frame_cmd
.function
, _("\
2929 Select a stack frame by function name.\n\
2931 Usage: select-frame function NAME"),
2932 &select_frame_cmd_list
,
2933 &cli_suppress_notification
.user_selected_context
);
2934 set_cmd_completer (cmd
, frame_selection_by_function_completer
);
2936 add_cmd_suppress_notification ("level", class_stack
,
2937 &select_frame_cmd
.level
, _("\
2938 Select a stack frame by level.\n\
2940 Usage: select-frame level LEVEL"),
2941 &select_frame_cmd_list
,
2942 &cli_suppress_notification
.user_selected_context
);
2944 add_com ("backtrace", class_stack
, backtrace_command
, _("\
2945 Print backtrace of all stack frames, or innermost COUNT frames.\n\
2946 Usage: backtrace [QUALIFIERS]... [COUNT]\n\
2947 With a negative argument, print outermost -COUNT frames.\n\
2948 Use of the 'full' qualifier also prints the values of the local variables.\n\
2949 Use of the 'no-filters' qualifier prohibits frame filters from executing\n\
2950 on this backtrace."));
2951 add_com_alias ("bt", "backtrace", class_stack
, 0);
2953 add_com_alias ("where", "backtrace", class_alias
, 0);
2954 add_info ("stack", backtrace_command
,
2955 _("Backtrace of the stack, or innermost COUNT frames."));
2956 add_info_alias ("s", "stack", 1);
2958 add_prefix_cmd ("frame", class_info
, &info_frame_cmd
.base_command
,
2959 _("All about the selected stack frame.\n\
2960 With no arguments, displays information about the currently selected stack\n\
2961 frame. Alternatively a frame specification may be provided (See \"frame\")\n\
2962 the information is then printed about the specified frame."),
2963 &info_frame_cmd_list
, "info frame ", 1, &infolist
);
2964 add_info_alias ("f", "frame", 1);
2966 add_cmd ("address", class_stack
, &info_frame_cmd
.address
,
2968 Print information about a stack frame selected by stack address.\n\
2970 Usage: info frame address STACK-ADDRESS"),
2971 &info_frame_cmd_list
);
2973 add_cmd ("view", class_stack
, &info_frame_cmd
.view
,
2975 Print information about a stack frame outside the current backtrace.\n\
2977 Usage: info frame view STACK-ADDRESS\n\
2978 info frame view STACK-ADDRESS PC-ADDRESS"),
2979 &info_frame_cmd_list
);
2981 cmd
= add_cmd ("function", class_stack
, &info_frame_cmd
.function
,
2983 Print information about a stack frame selected by function name.\n\
2985 Usage: info frame function NAME"),
2986 &info_frame_cmd_list
);
2987 set_cmd_completer (cmd
, frame_selection_by_function_completer
);
2989 add_cmd ("level", class_stack
, &info_frame_cmd
.level
,
2991 Print information about a stack frame selected by level.\n\
2993 Usage: info frame level LEVEL"),
2994 &info_frame_cmd_list
);
2996 add_info ("locals", info_locals_command
,
2997 _("Local variables of current stack frame."));
2998 add_info ("args", info_args_command
,
2999 _("Argument variables of current stack frame."));
3002 add_com ("func", class_stack
, func_command
, _("\
3003 Select the stack frame that contains NAME.\n\
3004 Usage: func NAME"));
3006 add_setshow_enum_cmd ("frame-arguments", class_stack
,
3007 print_frame_arguments_choices
, &print_frame_arguments
,
3008 _("Set printing of non-scalar frame arguments"),
3009 _("Show printing of non-scalar frame arguments"),
3010 NULL
, NULL
, NULL
, &setprintlist
, &showprintlist
);
3012 add_setshow_boolean_cmd ("frame-arguments", no_class
,
3013 &print_raw_frame_arguments
, _("\
3014 Set whether to print frame arguments in raw form."), _("\
3015 Show whether to print frame arguments in raw form."), _("\
3016 If set, frame arguments are printed in raw form, bypassing any\n\
3017 pretty-printers for that value."),
3019 &setprintrawlist
, &showprintrawlist
);
3021 add_setshow_auto_boolean_cmd ("disassemble-next-line", class_stack
,
3022 &disassemble_next_line
, _("\
3023 Set whether to disassemble next source line or insn when execution stops."),
3025 Show whether to disassemble next source line or insn when execution stops."),
3027 If ON, GDB will display disassembly of the next source line, in addition\n\
3028 to displaying the source line itself. If the next source line cannot\n\
3029 be displayed (e.g., source is unavailable or there's no line info), GDB\n\
3030 will display disassembly of next instruction instead of showing the\n\
3032 If AUTO, display disassembly of next instruction only if the source line\n\
3033 cannot be displayed.\n\
3034 If OFF (which is the default), never display the disassembly of the next\n\
3037 show_disassemble_next_line
,
3038 &setlist
, &showlist
);
3039 disassemble_next_line
= AUTO_BOOLEAN_FALSE
;
3041 add_setshow_enum_cmd ("entry-values", class_stack
,
3042 print_entry_values_choices
, &print_entry_values
,
3043 _("Set printing of function arguments at function "
3045 _("Show printing of function arguments at function "
3048 GDB can sometimes determine the values of function arguments at entry,\n\
3049 in addition to their current values. This option tells GDB whether\n\
3050 to print the current value, the value at entry (marked as val@entry),\n\
3051 or both. Note that one or both of these values may be <optimized out>."),
3052 NULL
, NULL
, &setprintlist
, &showprintlist
);