1 /* Print values for GDB, the GNU debugger.
3 Copyright (C) 1986-2022 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/>. */
30 #include "target-float.h"
31 #include "extension.h"
33 #include "gdbsupport/gdb_obstack.h"
35 #include "typeprint.h"
38 #include "gdbsupport/byte-vector.h"
39 #include "cli/cli-option.h"
41 #include "cli/cli-style.h"
42 #include "count-one-bits.h"
46 #include "gdbsupport/selftest.h"
47 #include "selftest-arch.h"
49 /* Maximum number of wchars returned from wchar_iterate. */
52 /* A convenience macro to compute the size of a wchar_t buffer containing X
54 #define WCHAR_BUFLEN(X) ((X) * sizeof (gdb_wchar_t))
56 /* Character buffer size saved while iterating over wchars. */
57 #define WCHAR_BUFLEN_MAX WCHAR_BUFLEN (MAX_WCHARS)
59 /* A structure to encapsulate state information from iterated
60 character conversions. */
61 struct converted_character
63 /* The number of characters converted. */
66 /* The result of the conversion. See charset.h for more. */
67 enum wchar_iterate_result result
;
69 /* The (saved) converted character(s). */
70 gdb_wchar_t chars
[WCHAR_BUFLEN_MAX
];
72 /* The first converted target byte. */
75 /* The number of bytes converted. */
78 /* How many times this character(s) is repeated. */
82 /* Command lists for set/show print raw. */
83 struct cmd_list_element
*setprintrawlist
;
84 struct cmd_list_element
*showprintrawlist
;
86 /* Prototypes for local functions */
88 static void set_input_radix_1 (int, unsigned);
90 static void set_output_radix_1 (int, unsigned);
92 static void val_print_type_code_flags (struct type
*type
,
93 struct value
*original_value
,
95 struct ui_file
*stream
);
97 #define PRINT_MAX_DEFAULT 200 /* Start print_max off at this value. */
98 #define PRINT_MAX_DEPTH_DEFAULT 20 /* Start print_max_depth off at this value. */
100 struct value_print_options user_print_options
=
102 Val_prettyformat_default
, /* prettyformat */
103 0, /* prettyformat_arrays */
104 0, /* prettyformat_structs */
107 1, /* addressprint */
108 false, /* nibblesprint */
110 PRINT_MAX_DEFAULT
, /* print_max */
111 10, /* repeat_count_threshold */
112 0, /* output_format */
114 1, /* memory_tag_violations */
115 0, /* stop_print_at_null */
116 0, /* print_array_indexes */
118 1, /* static_field_print */
119 1, /* pascal_static_field_print */
122 1, /* symbol_print */
123 PRINT_MAX_DEPTH_DEFAULT
, /* max_depth */
126 /* Initialize *OPTS to be a copy of the user print options. */
128 get_user_print_options (struct value_print_options
*opts
)
130 *opts
= user_print_options
;
133 /* Initialize *OPTS to be a copy of the user print options, but with
134 pretty-formatting disabled. */
136 get_no_prettyformat_print_options (struct value_print_options
*opts
)
138 *opts
= user_print_options
;
139 opts
->prettyformat
= Val_no_prettyformat
;
142 /* Initialize *OPTS to be a copy of the user print options, but using
143 FORMAT as the formatting option. */
145 get_formatted_print_options (struct value_print_options
*opts
,
148 *opts
= user_print_options
;
149 opts
->format
= format
;
153 show_print_max (struct ui_file
*file
, int from_tty
,
154 struct cmd_list_element
*c
, const char *value
)
157 _("Limit on string chars or array "
158 "elements to print is %s.\n"),
163 /* Default input and output radixes, and output format letter. */
165 unsigned input_radix
= 10;
167 show_input_radix (struct ui_file
*file
, int from_tty
,
168 struct cmd_list_element
*c
, const char *value
)
171 _("Default input radix for entering numbers is %s.\n"),
175 unsigned output_radix
= 10;
177 show_output_radix (struct ui_file
*file
, int from_tty
,
178 struct cmd_list_element
*c
, const char *value
)
181 _("Default output radix for printing of values is %s.\n"),
185 /* By default we print arrays without printing the index of each element in
186 the array. This behavior can be changed by setting PRINT_ARRAY_INDEXES. */
189 show_print_array_indexes (struct ui_file
*file
, int from_tty
,
190 struct cmd_list_element
*c
, const char *value
)
192 gdb_printf (file
, _("Printing of array indexes is %s.\n"), value
);
195 /* Print repeat counts if there are more than this many repetitions of an
196 element in an array. Referenced by the low level language dependent
200 show_repeat_count_threshold (struct ui_file
*file
, int from_tty
,
201 struct cmd_list_element
*c
, const char *value
)
203 gdb_printf (file
, _("Threshold for repeated print elements is %s.\n"),
207 /* If nonzero, prints memory tag violations for pointers. */
210 show_memory_tag_violations (struct ui_file
*file
, int from_tty
,
211 struct cmd_list_element
*c
, const char *value
)
214 _("Printing of memory tag violations is %s.\n"),
218 /* If nonzero, stops printing of char arrays at first null. */
221 show_stop_print_at_null (struct ui_file
*file
, int from_tty
,
222 struct cmd_list_element
*c
, const char *value
)
225 _("Printing of char arrays to stop "
226 "at first null char is %s.\n"),
230 /* Controls pretty printing of structures. */
233 show_prettyformat_structs (struct ui_file
*file
, int from_tty
,
234 struct cmd_list_element
*c
, const char *value
)
236 gdb_printf (file
, _("Pretty formatting of structures is %s.\n"), value
);
239 /* Controls pretty printing of arrays. */
242 show_prettyformat_arrays (struct ui_file
*file
, int from_tty
,
243 struct cmd_list_element
*c
, const char *value
)
245 gdb_printf (file
, _("Pretty formatting of arrays is %s.\n"), value
);
248 /* If nonzero, causes unions inside structures or other unions to be
252 show_unionprint (struct ui_file
*file
, int from_tty
,
253 struct cmd_list_element
*c
, const char *value
)
256 _("Printing of unions interior to structures is %s.\n"),
260 /* Controls the format of printing binary values. */
263 show_nibbles (struct ui_file
*file
, int from_tty
,
264 struct cmd_list_element
*c
, const char *value
)
267 _("Printing binary values in groups is %s.\n"),
271 /* If nonzero, causes machine addresses to be printed in certain contexts. */
274 show_addressprint (struct ui_file
*file
, int from_tty
,
275 struct cmd_list_element
*c
, const char *value
)
277 gdb_printf (file
, _("Printing of addresses is %s.\n"), value
);
281 show_symbol_print (struct ui_file
*file
, int from_tty
,
282 struct cmd_list_element
*c
, const char *value
)
285 _("Printing of symbols when printing pointers is %s.\n"),
291 /* A helper function for val_print. When printing in "summary" mode,
292 we want to print scalar arguments, but not aggregate arguments.
293 This function distinguishes between the two. */
296 val_print_scalar_type_p (struct type
*type
)
298 type
= check_typedef (type
);
299 while (TYPE_IS_REFERENCE (type
))
301 type
= TYPE_TARGET_TYPE (type
);
302 type
= check_typedef (type
);
304 switch (type
->code ())
306 case TYPE_CODE_ARRAY
:
307 case TYPE_CODE_STRUCT
:
308 case TYPE_CODE_UNION
:
310 case TYPE_CODE_STRING
:
317 /* A helper function for val_print. When printing with limited depth we
318 want to print string and scalar arguments, but not aggregate arguments.
319 This function distinguishes between the two. */
322 val_print_scalar_or_string_type_p (struct type
*type
,
323 const struct language_defn
*language
)
325 return (val_print_scalar_type_p (type
)
326 || language
->is_string_type_p (type
));
329 /* See valprint.h. */
332 valprint_check_validity (struct ui_file
*stream
,
334 LONGEST embedded_offset
,
335 const struct value
*val
)
337 type
= check_typedef (type
);
339 if (type_not_associated (type
))
341 val_print_not_associated (stream
);
345 if (type_not_allocated (type
))
347 val_print_not_allocated (stream
);
351 if (type
->code () != TYPE_CODE_UNION
352 && type
->code () != TYPE_CODE_STRUCT
353 && type
->code () != TYPE_CODE_ARRAY
)
355 if (value_bits_any_optimized_out (val
,
356 TARGET_CHAR_BIT
* embedded_offset
,
357 TARGET_CHAR_BIT
* TYPE_LENGTH (type
)))
359 val_print_optimized_out (val
, stream
);
363 if (value_bits_synthetic_pointer (val
, TARGET_CHAR_BIT
* embedded_offset
,
364 TARGET_CHAR_BIT
* TYPE_LENGTH (type
)))
366 const int is_ref
= type
->code () == TYPE_CODE_REF
;
367 int ref_is_addressable
= 0;
371 const struct value
*deref_val
= coerce_ref_if_computed (val
);
373 if (deref_val
!= NULL
)
374 ref_is_addressable
= value_lval_const (deref_val
) == lval_memory
;
377 if (!is_ref
|| !ref_is_addressable
)
378 fputs_styled (_("<synthetic pointer>"), metadata_style
.style (),
381 /* C++ references should be valid even if they're synthetic. */
385 if (!value_bytes_available (val
, embedded_offset
, TYPE_LENGTH (type
)))
387 val_print_unavailable (stream
);
396 val_print_optimized_out (const struct value
*val
, struct ui_file
*stream
)
398 if (val
!= NULL
&& value_lval_const (val
) == lval_register
)
399 val_print_not_saved (stream
);
401 fprintf_styled (stream
, metadata_style
.style (), _("<optimized out>"));
405 val_print_not_saved (struct ui_file
*stream
)
407 fprintf_styled (stream
, metadata_style
.style (), _("<not saved>"));
411 val_print_unavailable (struct ui_file
*stream
)
413 fprintf_styled (stream
, metadata_style
.style (), _("<unavailable>"));
417 val_print_invalid_address (struct ui_file
*stream
)
419 fprintf_styled (stream
, metadata_style
.style (), _("<invalid address>"));
422 /* Print a pointer based on the type of its target.
424 Arguments to this functions are roughly the same as those in
425 generic_val_print. A difference is that ADDRESS is the address to print,
426 with embedded_offset already added. ELTTYPE represents
427 the pointed type after check_typedef. */
430 print_unpacked_pointer (struct type
*type
, struct type
*elttype
,
431 CORE_ADDR address
, struct ui_file
*stream
,
432 const struct value_print_options
*options
)
434 struct gdbarch
*gdbarch
= type
->arch ();
436 if (elttype
->code () == TYPE_CODE_FUNC
)
438 /* Try to print what function it points to. */
439 print_function_pointer_address (options
, gdbarch
, address
, stream
);
443 if (options
->symbol_print
)
444 print_address_demangle (options
, gdbarch
, address
, stream
, demangle
);
445 else if (options
->addressprint
)
446 gdb_puts (paddress (gdbarch
, address
), stream
);
449 /* generic_val_print helper for TYPE_CODE_ARRAY. */
452 generic_val_print_array (struct value
*val
,
453 struct ui_file
*stream
, int recurse
,
454 const struct value_print_options
*options
,
456 generic_val_print_decorations
*decorations
)
458 struct type
*type
= check_typedef (value_type (val
));
459 struct type
*unresolved_elttype
= TYPE_TARGET_TYPE (type
);
460 struct type
*elttype
= check_typedef (unresolved_elttype
);
462 if (TYPE_LENGTH (type
) > 0 && TYPE_LENGTH (unresolved_elttype
) > 0)
464 LONGEST low_bound
, high_bound
;
466 if (!get_array_bounds (type
, &low_bound
, &high_bound
))
467 error (_("Could not determine the array high bound"));
469 gdb_puts (decorations
->array_start
, stream
);
470 value_print_array_elements (val
, stream
, recurse
, options
, 0);
471 gdb_puts (decorations
->array_end
, stream
);
475 /* Array of unspecified length: treat like pointer to first elt. */
476 print_unpacked_pointer (type
, elttype
, value_address (val
),
482 /* generic_value_print helper for TYPE_CODE_PTR. */
485 generic_value_print_ptr (struct value
*val
, struct ui_file
*stream
,
486 const struct value_print_options
*options
)
489 if (options
->format
&& options
->format
!= 's')
490 value_print_scalar_formatted (val
, options
, 0, stream
);
493 struct type
*type
= check_typedef (value_type (val
));
494 struct type
*elttype
= check_typedef (TYPE_TARGET_TYPE (type
));
495 const gdb_byte
*valaddr
= value_contents_for_printing (val
).data ();
496 CORE_ADDR addr
= unpack_pointer (type
, valaddr
);
498 print_unpacked_pointer (type
, elttype
, addr
, stream
, options
);
503 /* Print '@' followed by the address contained in ADDRESS_BUFFER. */
506 print_ref_address (struct type
*type
, const gdb_byte
*address_buffer
,
507 int embedded_offset
, struct ui_file
*stream
)
509 struct gdbarch
*gdbarch
= type
->arch ();
511 if (address_buffer
!= NULL
)
514 = extract_typed_address (address_buffer
+ embedded_offset
, type
);
516 gdb_printf (stream
, "@");
517 gdb_puts (paddress (gdbarch
, address
), stream
);
519 /* Else: we have a non-addressable value, such as a DW_AT_const_value. */
522 /* If VAL is addressable, return the value contents buffer of a value that
523 represents a pointer to VAL. Otherwise return NULL. */
525 static const gdb_byte
*
526 get_value_addr_contents (struct value
*deref_val
)
528 gdb_assert (deref_val
!= NULL
);
530 if (value_lval_const (deref_val
) == lval_memory
)
531 return value_contents_for_printing_const (value_addr (deref_val
)).data ();
534 /* We have a non-addressable value, such as a DW_AT_const_value. */
539 /* generic_val_print helper for TYPE_CODE_{RVALUE_,}REF. */
542 generic_val_print_ref (struct type
*type
,
543 int embedded_offset
, struct ui_file
*stream
, int recurse
,
544 struct value
*original_value
,
545 const struct value_print_options
*options
)
547 struct type
*elttype
= check_typedef (TYPE_TARGET_TYPE (type
));
548 struct value
*deref_val
= NULL
;
549 const int value_is_synthetic
550 = value_bits_synthetic_pointer (original_value
,
551 TARGET_CHAR_BIT
* embedded_offset
,
552 TARGET_CHAR_BIT
* TYPE_LENGTH (type
));
553 const int must_coerce_ref
= ((options
->addressprint
&& value_is_synthetic
)
554 || options
->deref_ref
);
555 const int type_is_defined
= elttype
->code () != TYPE_CODE_UNDEF
;
556 const gdb_byte
*valaddr
= value_contents_for_printing (original_value
).data ();
558 if (must_coerce_ref
&& type_is_defined
)
560 deref_val
= coerce_ref_if_computed (original_value
);
562 if (deref_val
!= NULL
)
564 /* More complicated computed references are not supported. */
565 gdb_assert (embedded_offset
== 0);
568 deref_val
= value_at (TYPE_TARGET_TYPE (type
),
569 unpack_pointer (type
, valaddr
+ embedded_offset
));
571 /* Else, original_value isn't a synthetic reference or we don't have to print
572 the reference's contents.
574 Notice that for references to TYPE_CODE_STRUCT, 'set print object on' will
575 cause original_value to be a not_lval instead of an lval_computed,
576 which will make value_bits_synthetic_pointer return false.
577 This happens because if options->objectprint is true, c_value_print will
578 overwrite original_value's contents with the result of coercing
579 the reference through value_addr, and then set its type back to
580 TYPE_CODE_REF. In that case we don't have to coerce the reference again;
581 we can simply treat it as non-synthetic and move on. */
583 if (options
->addressprint
)
585 const gdb_byte
*address
= (value_is_synthetic
&& type_is_defined
586 ? get_value_addr_contents (deref_val
)
589 print_ref_address (type
, address
, embedded_offset
, stream
);
591 if (options
->deref_ref
)
592 gdb_puts (": ", stream
);
595 if (options
->deref_ref
)
598 common_val_print (deref_val
, stream
, recurse
, options
,
601 gdb_puts ("???", stream
);
605 /* Helper function for generic_val_print_enum.
606 This is also used to print enums in TYPE_CODE_FLAGS values. */
609 generic_val_print_enum_1 (struct type
*type
, LONGEST val
,
610 struct ui_file
*stream
)
615 len
= type
->num_fields ();
616 for (i
= 0; i
< len
; i
++)
619 if (val
== type
->field (i
).loc_enumval ())
626 fputs_styled (type
->field (i
).name (), variable_name_style
.style (),
629 else if (type
->is_flag_enum ())
633 /* We have a "flag" enum, so we try to decompose it into pieces as
634 appropriate. The enum may have multiple enumerators representing
635 the same bit, in which case we choose to only print the first one
637 for (i
= 0; i
< len
; ++i
)
641 ULONGEST enumval
= type
->field (i
).loc_enumval ();
642 int nbits
= count_one_bits_ll (enumval
);
644 gdb_assert (nbits
== 0 || nbits
== 1);
646 if ((val
& enumval
) != 0)
650 gdb_puts ("(", stream
);
654 gdb_puts (" | ", stream
);
656 val
&= ~type
->field (i
).loc_enumval ();
657 fputs_styled (type
->field (i
).name (),
658 variable_name_style
.style (), stream
);
664 /* There are leftover bits, print them. */
666 gdb_puts ("(", stream
);
668 gdb_puts (" | ", stream
);
670 gdb_puts ("unknown: 0x", stream
);
671 print_longest (stream
, 'x', 0, val
);
672 gdb_puts (")", stream
);
676 /* Nothing has been printed and the value is 0, the enum value must
678 gdb_puts ("0", stream
);
682 /* Something has been printed, close the parenthesis. */
683 gdb_puts (")", stream
);
687 print_longest (stream
, 'd', 0, val
);
690 /* generic_val_print helper for TYPE_CODE_ENUM. */
693 generic_val_print_enum (struct type
*type
,
694 int embedded_offset
, struct ui_file
*stream
,
695 struct value
*original_value
,
696 const struct value_print_options
*options
)
699 struct gdbarch
*gdbarch
= type
->arch ();
700 int unit_size
= gdbarch_addressable_memory_unit_size (gdbarch
);
702 gdb_assert (!options
->format
);
704 const gdb_byte
*valaddr
= value_contents_for_printing (original_value
).data ();
706 val
= unpack_long (type
, valaddr
+ embedded_offset
* unit_size
);
708 generic_val_print_enum_1 (type
, val
, stream
);
711 /* generic_val_print helper for TYPE_CODE_FUNC and TYPE_CODE_METHOD. */
714 generic_val_print_func (struct type
*type
,
715 int embedded_offset
, CORE_ADDR address
,
716 struct ui_file
*stream
,
717 struct value
*original_value
,
718 const struct value_print_options
*options
)
720 struct gdbarch
*gdbarch
= type
->arch ();
722 gdb_assert (!options
->format
);
724 /* FIXME, we should consider, at least for ANSI C language,
725 eliminating the distinction made between FUNCs and POINTERs to
727 gdb_printf (stream
, "{");
728 type_print (type
, "", stream
, -1);
729 gdb_printf (stream
, "} ");
730 /* Try to print what function it points to, and its address. */
731 print_address_demangle (options
, gdbarch
, address
, stream
, demangle
);
734 /* generic_value_print helper for TYPE_CODE_BOOL. */
737 generic_value_print_bool
738 (struct value
*value
, struct ui_file
*stream
,
739 const struct value_print_options
*options
,
740 const struct generic_val_print_decorations
*decorations
)
742 if (options
->format
|| options
->output_format
)
744 struct value_print_options opts
= *options
;
745 opts
.format
= (options
->format
? options
->format
746 : options
->output_format
);
747 value_print_scalar_formatted (value
, &opts
, 0, stream
);
751 const gdb_byte
*valaddr
= value_contents_for_printing (value
).data ();
752 struct type
*type
= check_typedef (value_type (value
));
753 LONGEST val
= unpack_long (type
, valaddr
);
755 gdb_puts (decorations
->false_name
, stream
);
757 gdb_puts (decorations
->true_name
, stream
);
759 print_longest (stream
, 'd', 0, val
);
763 /* generic_value_print helper for TYPE_CODE_INT. */
766 generic_value_print_int (struct value
*val
, struct ui_file
*stream
,
767 const struct value_print_options
*options
)
769 struct value_print_options opts
= *options
;
771 opts
.format
= (options
->format
? options
->format
772 : options
->output_format
);
773 value_print_scalar_formatted (val
, &opts
, 0, stream
);
776 /* generic_value_print helper for TYPE_CODE_CHAR. */
779 generic_value_print_char (struct value
*value
, struct ui_file
*stream
,
780 const struct value_print_options
*options
)
782 if (options
->format
|| options
->output_format
)
784 struct value_print_options opts
= *options
;
786 opts
.format
= (options
->format
? options
->format
787 : options
->output_format
);
788 value_print_scalar_formatted (value
, &opts
, 0, stream
);
792 struct type
*unresolved_type
= value_type (value
);
793 struct type
*type
= check_typedef (unresolved_type
);
794 const gdb_byte
*valaddr
= value_contents_for_printing (value
).data ();
796 LONGEST val
= unpack_long (type
, valaddr
);
797 if (type
->is_unsigned ())
798 gdb_printf (stream
, "%u", (unsigned int) val
);
800 gdb_printf (stream
, "%d", (int) val
);
801 gdb_puts (" ", stream
);
802 current_language
->printchar (val
, unresolved_type
, stream
);
806 /* generic_val_print helper for TYPE_CODE_FLT and TYPE_CODE_DECFLOAT. */
809 generic_val_print_float (struct type
*type
, struct ui_file
*stream
,
810 struct value
*original_value
,
811 const struct value_print_options
*options
)
813 gdb_assert (!options
->format
);
815 const gdb_byte
*valaddr
= value_contents_for_printing (original_value
).data ();
817 print_floating (valaddr
, type
, stream
);
820 /* generic_val_print helper for TYPE_CODE_FIXED_POINT. */
823 generic_val_print_fixed_point (struct value
*val
, struct ui_file
*stream
,
824 const struct value_print_options
*options
)
827 value_print_scalar_formatted (val
, options
, 0, stream
);
830 struct type
*type
= value_type (val
);
832 const gdb_byte
*valaddr
= value_contents_for_printing (val
).data ();
835 f
.read_fixed_point (gdb::make_array_view (valaddr
, TYPE_LENGTH (type
)),
836 type_byte_order (type
), type
->is_unsigned (),
837 type
->fixed_point_scaling_factor ());
839 const char *fmt
= TYPE_LENGTH (type
) < 4 ? "%.11Fg" : "%.17Fg";
840 std::string str
= gmp_string_printf (fmt
, f
.val
);
841 gdb_printf (stream
, "%s", str
.c_str ());
845 /* generic_value_print helper for TYPE_CODE_COMPLEX. */
848 generic_value_print_complex (struct value
*val
, struct ui_file
*stream
,
849 const struct value_print_options
*options
,
850 const struct generic_val_print_decorations
853 gdb_printf (stream
, "%s", decorations
->complex_prefix
);
855 struct value
*real_part
= value_real_part (val
);
856 value_print_scalar_formatted (real_part
, options
, 0, stream
);
857 gdb_printf (stream
, "%s", decorations
->complex_infix
);
859 struct value
*imag_part
= value_imaginary_part (val
);
860 value_print_scalar_formatted (imag_part
, options
, 0, stream
);
861 gdb_printf (stream
, "%s", decorations
->complex_suffix
);
864 /* generic_value_print helper for TYPE_CODE_MEMBERPTR. */
867 generic_value_print_memberptr
868 (struct value
*val
, struct ui_file
*stream
,
870 const struct value_print_options
*options
,
871 const struct generic_val_print_decorations
*decorations
)
873 if (!options
->format
)
875 /* Member pointers are essentially specific to C++, and so if we
876 encounter one, we should print it according to C++ rules. */
877 struct type
*type
= check_typedef (value_type (val
));
878 const gdb_byte
*valaddr
= value_contents_for_printing (val
).data ();
879 cp_print_class_member (valaddr
, type
, stream
, "&");
882 generic_value_print (val
, stream
, recurse
, options
, decorations
);
885 /* See valprint.h. */
888 generic_value_print (struct value
*val
, struct ui_file
*stream
, int recurse
,
889 const struct value_print_options
*options
,
890 const struct generic_val_print_decorations
*decorations
)
892 struct type
*type
= value_type (val
);
894 type
= check_typedef (type
);
896 if (is_fixed_point_type (type
))
897 type
= type
->fixed_point_type_base_type ();
899 /* Widen a subrange to its target type, then use that type's
901 while (type
->code () == TYPE_CODE_RANGE
)
903 type
= check_typedef (TYPE_TARGET_TYPE (type
));
904 val
= value_cast (type
, val
);
907 switch (type
->code ())
909 case TYPE_CODE_ARRAY
:
910 generic_val_print_array (val
, stream
, recurse
, options
, decorations
);
913 case TYPE_CODE_MEMBERPTR
:
914 generic_value_print_memberptr (val
, stream
, recurse
, options
,
919 generic_value_print_ptr (val
, stream
, options
);
923 case TYPE_CODE_RVALUE_REF
:
924 generic_val_print_ref (type
, 0, stream
, recurse
,
930 value_print_scalar_formatted (val
, options
, 0, stream
);
932 generic_val_print_enum (type
, 0, stream
, val
, options
);
935 case TYPE_CODE_FLAGS
:
937 value_print_scalar_formatted (val
, options
, 0, stream
);
939 val_print_type_code_flags (type
, val
, 0, stream
);
943 case TYPE_CODE_METHOD
:
945 value_print_scalar_formatted (val
, options
, 0, stream
);
947 generic_val_print_func (type
, 0, value_address (val
), stream
,
952 generic_value_print_bool (val
, stream
, options
, decorations
);
956 generic_value_print_int (val
, stream
, options
);
960 generic_value_print_char (val
, stream
, options
);
964 case TYPE_CODE_DECFLOAT
:
966 value_print_scalar_formatted (val
, options
, 0, stream
);
968 generic_val_print_float (type
, stream
, val
, options
);
971 case TYPE_CODE_FIXED_POINT
:
972 generic_val_print_fixed_point (val
, stream
, options
);
976 gdb_puts (decorations
->void_name
, stream
);
979 case TYPE_CODE_ERROR
:
980 gdb_printf (stream
, "%s", TYPE_ERROR_NAME (type
));
983 case TYPE_CODE_UNDEF
:
984 /* This happens (without TYPE_STUB set) on systems which don't use
985 dbx xrefs (NO_DBX_XREFS in gcc) if a file has a "struct foo *bar"
986 and no complete type for struct foo in that file. */
987 fprintf_styled (stream
, metadata_style
.style (), _("<incomplete type>"));
990 case TYPE_CODE_COMPLEX
:
991 generic_value_print_complex (val
, stream
, options
, decorations
);
994 case TYPE_CODE_METHODPTR
:
995 cplus_print_method_ptr (value_contents_for_printing (val
).data (), type
,
999 case TYPE_CODE_UNION
:
1000 case TYPE_CODE_STRUCT
:
1002 error (_("Unhandled type code %d in symbol table."),
1007 /* Print using the given LANGUAGE the value VAL onto stream STREAM according
1010 This is a preferable interface to val_print, above, because it uses
1011 GDB's value mechanism. */
1014 common_val_print (struct value
*value
, struct ui_file
*stream
, int recurse
,
1015 const struct value_print_options
*options
,
1016 const struct language_defn
*language
)
1018 if (language
->la_language
== language_ada
)
1019 /* The value might have a dynamic type, which would cause trouble
1020 below when trying to extract the value contents (since the value
1021 size is determined from the type size which is unknown). So
1022 get a fixed representation of our value. */
1023 value
= ada_to_fixed_value (value
);
1025 if (value_lazy (value
))
1026 value_fetch_lazy (value
);
1028 struct value_print_options local_opts
= *options
;
1029 struct type
*type
= value_type (value
);
1030 struct type
*real_type
= check_typedef (type
);
1032 if (local_opts
.prettyformat
== Val_prettyformat_default
)
1033 local_opts
.prettyformat
= (local_opts
.prettyformat_structs
1034 ? Val_prettyformat
: Val_no_prettyformat
);
1038 /* Ensure that the type is complete and not just a stub. If the type is
1039 only a stub and we can't find and substitute its complete type, then
1040 print appropriate string and return. */
1042 if (real_type
->is_stub ())
1044 fprintf_styled (stream
, metadata_style
.style (), _("<incomplete type>"));
1048 if (!valprint_check_validity (stream
, real_type
, 0, value
))
1053 if (apply_ext_lang_val_pretty_printer (value
, stream
, recurse
, options
,
1058 /* Handle summary mode. If the value is a scalar, print it;
1059 otherwise, print an ellipsis. */
1060 if (options
->summary
&& !val_print_scalar_type_p (type
))
1062 gdb_printf (stream
, "...");
1066 /* If this value is too deep then don't print it. */
1067 if (!val_print_scalar_or_string_type_p (type
, language
)
1068 && val_print_check_max_depth (stream
, recurse
, options
, language
))
1073 language
->value_print_inner (value
, stream
, recurse
, &local_opts
);
1075 catch (const gdb_exception_error
&except
)
1077 fprintf_styled (stream
, metadata_style
.style (),
1078 _("<error reading variable: %s>"), except
.what ());
1082 /* See valprint.h. */
1085 val_print_check_max_depth (struct ui_file
*stream
, int recurse
,
1086 const struct value_print_options
*options
,
1087 const struct language_defn
*language
)
1089 if (options
->max_depth
> -1 && recurse
>= options
->max_depth
)
1091 gdb_assert (language
->struct_too_deep_ellipsis () != NULL
);
1092 gdb_puts (language
->struct_too_deep_ellipsis (), stream
);
1099 /* Check whether the value VAL is printable. Return 1 if it is;
1100 return 0 and print an appropriate error message to STREAM according to
1101 OPTIONS if it is not. */
1104 value_check_printable (struct value
*val
, struct ui_file
*stream
,
1105 const struct value_print_options
*options
)
1109 fprintf_styled (stream
, metadata_style
.style (),
1110 _("<address of value unknown>"));
1114 if (value_entirely_optimized_out (val
))
1116 if (options
->summary
&& !val_print_scalar_type_p (value_type (val
)))
1117 gdb_printf (stream
, "...");
1119 val_print_optimized_out (val
, stream
);
1123 if (value_entirely_unavailable (val
))
1125 if (options
->summary
&& !val_print_scalar_type_p (value_type (val
)))
1126 gdb_printf (stream
, "...");
1128 val_print_unavailable (stream
);
1132 if (value_type (val
)->code () == TYPE_CODE_INTERNAL_FUNCTION
)
1134 fprintf_styled (stream
, metadata_style
.style (),
1135 _("<internal function %s>"),
1136 value_internal_function_name (val
));
1140 if (type_not_associated (value_type (val
)))
1142 val_print_not_associated (stream
);
1146 if (type_not_allocated (value_type (val
)))
1148 val_print_not_allocated (stream
);
1155 /* See valprint.h. */
1158 common_val_print_checked (struct value
*val
, struct ui_file
*stream
,
1160 const struct value_print_options
*options
,
1161 const struct language_defn
*language
)
1163 if (!value_check_printable (val
, stream
, options
))
1165 common_val_print (val
, stream
, recurse
, options
, language
);
1168 /* Print on stream STREAM the value VAL according to OPTIONS. The value
1169 is printed using the current_language syntax. */
1172 value_print (struct value
*val
, struct ui_file
*stream
,
1173 const struct value_print_options
*options
)
1175 scoped_value_mark free_values
;
1177 if (!value_check_printable (val
, stream
, options
))
1183 = apply_ext_lang_val_pretty_printer (val
, stream
, 0, options
,
1190 current_language
->value_print (val
, stream
, options
);
1194 val_print_type_code_flags (struct type
*type
, struct value
*original_value
,
1195 int embedded_offset
, struct ui_file
*stream
)
1197 const gdb_byte
*valaddr
= (value_contents_for_printing (original_value
).data ()
1199 ULONGEST val
= unpack_long (type
, valaddr
);
1200 int field
, nfields
= type
->num_fields ();
1201 struct gdbarch
*gdbarch
= type
->arch ();
1202 struct type
*bool_type
= builtin_type (gdbarch
)->builtin_bool
;
1204 gdb_puts ("[", stream
);
1205 for (field
= 0; field
< nfields
; field
++)
1207 if (type
->field (field
).name ()[0] != '\0')
1209 struct type
*field_type
= type
->field (field
).type ();
1211 if (field_type
== bool_type
1212 /* We require boolean types here to be one bit wide. This is a
1213 problematic place to notify the user of an internal error
1214 though. Instead just fall through and print the field as an
1216 && TYPE_FIELD_BITSIZE (type
, field
) == 1)
1218 if (val
& ((ULONGEST
)1 << type
->field (field
).loc_bitpos ()))
1221 styled_string (variable_name_style
.style (),
1222 type
->field (field
).name ()));
1226 unsigned field_len
= TYPE_FIELD_BITSIZE (type
, field
);
1227 ULONGEST field_val
= val
>> type
->field (field
).loc_bitpos ();
1229 if (field_len
< sizeof (ULONGEST
) * TARGET_CHAR_BIT
)
1230 field_val
&= ((ULONGEST
) 1 << field_len
) - 1;
1231 gdb_printf (stream
, " %ps=",
1232 styled_string (variable_name_style
.style (),
1233 type
->field (field
).name ()));
1234 if (field_type
->code () == TYPE_CODE_ENUM
)
1235 generic_val_print_enum_1 (field_type
, field_val
, stream
);
1237 print_longest (stream
, 'd', 0, field_val
);
1241 gdb_puts (" ]", stream
);
1244 /* See valprint.h. */
1247 value_print_scalar_formatted (struct value
*val
,
1248 const struct value_print_options
*options
,
1250 struct ui_file
*stream
)
1252 struct type
*type
= check_typedef (value_type (val
));
1254 gdb_assert (val
!= NULL
);
1256 /* If we get here with a string format, try again without it. Go
1257 all the way back to the language printers, which may call us
1259 if (options
->format
== 's')
1261 struct value_print_options opts
= *options
;
1264 common_val_print (val
, stream
, 0, &opts
, current_language
);
1268 /* value_contents_for_printing fetches all VAL's contents. They are
1269 needed to check whether VAL is optimized-out or unavailable
1271 const gdb_byte
*valaddr
= value_contents_for_printing (val
).data ();
1273 /* A scalar object that does not have all bits available can't be
1274 printed, because all bits contribute to its representation. */
1275 if (value_bits_any_optimized_out (val
, 0,
1276 TARGET_CHAR_BIT
* TYPE_LENGTH (type
)))
1277 val_print_optimized_out (val
, stream
);
1278 else if (!value_bytes_available (val
, 0, TYPE_LENGTH (type
)))
1279 val_print_unavailable (stream
);
1281 print_scalar_formatted (valaddr
, type
, options
, size
, stream
);
1284 /* Print a number according to FORMAT which is one of d,u,x,o,b,h,w,g.
1285 The raison d'etre of this function is to consolidate printing of
1286 LONG_LONG's into this one function. The format chars b,h,w,g are
1287 from print_scalar_formatted(). Numbers are printed using C
1290 USE_C_FORMAT means to use C format in all cases. Without it,
1291 'o' and 'x' format do not include the standard C radix prefix
1294 Hilfinger/2004-09-09: USE_C_FORMAT was originally called USE_LOCAL
1295 and was intended to request formatting according to the current
1296 language and would be used for most integers that GDB prints. The
1297 exceptional cases were things like protocols where the format of
1298 the integer is a protocol thing, not a user-visible thing). The
1299 parameter remains to preserve the information of what things might
1300 be printed with language-specific format, should we ever resurrect
1304 print_longest (struct ui_file
*stream
, int format
, int use_c_format
,
1312 val
= int_string (val_long
, 10, 1, 0, 1); break;
1314 val
= int_string (val_long
, 10, 0, 0, 1); break;
1316 val
= int_string (val_long
, 16, 0, 0, use_c_format
); break;
1318 val
= int_string (val_long
, 16, 0, 2, 1); break;
1320 val
= int_string (val_long
, 16, 0, 4, 1); break;
1322 val
= int_string (val_long
, 16, 0, 8, 1); break;
1324 val
= int_string (val_long
, 16, 0, 16, 1); break;
1327 val
= int_string (val_long
, 8, 0, 0, use_c_format
); break;
1329 internal_error (__FILE__
, __LINE__
,
1330 _("failed internal consistency check"));
1332 gdb_puts (val
, stream
);
1335 /* This used to be a macro, but I don't think it is called often enough
1336 to merit such treatment. */
1337 /* Convert a LONGEST to an int. This is used in contexts (e.g. number of
1338 arguments to a function, number in a value history, register number, etc.)
1339 where the value must not be larger than can fit in an int. */
1342 longest_to_int (LONGEST arg
)
1344 /* Let the compiler do the work. */
1345 int rtnval
= (int) arg
;
1347 /* Check for overflows or underflows. */
1348 if (sizeof (LONGEST
) > sizeof (int))
1352 error (_("Value out of range."));
1358 /* Print a floating point value of floating-point type TYPE,
1359 pointed to in GDB by VALADDR, on STREAM. */
1362 print_floating (const gdb_byte
*valaddr
, struct type
*type
,
1363 struct ui_file
*stream
)
1365 std::string str
= target_float_to_string (valaddr
, type
);
1366 gdb_puts (str
.c_str (), stream
);
1370 print_binary_chars (struct ui_file
*stream
, const gdb_byte
*valaddr
,
1371 unsigned len
, enum bfd_endian byte_order
, bool zero_pad
,
1372 const struct value_print_options
*options
)
1377 bool seen_a_one
= false;
1378 const char *digit_separator
= nullptr;
1380 /* Declared "int" so it will be signed.
1381 This ensures that right shift will shift in zeros. */
1383 const int mask
= 0x080;
1385 if (options
->nibblesprint
)
1386 digit_separator
= current_language
->get_digit_separator();
1388 if (byte_order
== BFD_ENDIAN_BIG
)
1394 /* Every byte has 8 binary characters; peel off
1395 and print from the MSB end. */
1397 for (i
= 0; i
< (HOST_CHAR_BIT
* sizeof (*p
)); i
++)
1399 if (options
->nibblesprint
&& seen_a_one
&& i
% 4 == 0)
1400 gdb_putc (*digit_separator
, stream
);
1402 if (*p
& (mask
>> i
))
1407 if (zero_pad
|| seen_a_one
|| b
== '1')
1408 gdb_putc (b
, stream
);
1409 else if (options
->nibblesprint
)
1411 if ((0xf0 & (mask
>> i
) && (*p
& 0xf0))
1412 || (0x0f & (mask
>> i
) && (*p
& 0x0f)))
1413 gdb_putc (b
, stream
);
1423 for (p
= valaddr
+ len
- 1;
1427 for (i
= 0; i
< (HOST_CHAR_BIT
* sizeof (*p
)); i
++)
1429 if (options
->nibblesprint
&& seen_a_one
&& i
% 4 == 0)
1430 gdb_putc (*digit_separator
, stream
);
1432 if (*p
& (mask
>> i
))
1437 if (zero_pad
|| seen_a_one
|| b
== '1')
1438 gdb_putc (b
, stream
);
1439 else if (options
->nibblesprint
)
1441 if ((0xf0 & (mask
>> i
) && (*p
& 0xf0))
1442 || (0x0f & (mask
>> i
) && (*p
& 0x0f)))
1443 gdb_putc (b
, stream
);
1452 /* When not zero-padding, ensure that something is printed when the
1454 if (!zero_pad
&& !seen_a_one
)
1455 gdb_putc ('0', stream
);
1458 /* A helper for print_octal_chars that emits a single octal digit,
1459 optionally suppressing it if is zero and updating SEEN_A_ONE. */
1462 emit_octal_digit (struct ui_file
*stream
, bool *seen_a_one
, int digit
)
1464 if (*seen_a_one
|| digit
!= 0)
1465 gdb_printf (stream
, "%o", digit
);
1470 /* VALADDR points to an integer of LEN bytes.
1471 Print it in octal on stream or format it in buf. */
1474 print_octal_chars (struct ui_file
*stream
, const gdb_byte
*valaddr
,
1475 unsigned len
, enum bfd_endian byte_order
)
1478 unsigned char octa1
, octa2
, octa3
, carry
;
1481 /* Octal is 3 bits, which doesn't fit. Yuk. So we have to track
1482 * the extra bits, which cycle every three bytes:
1484 * Byte side: 0 1 2 3
1486 * bit number 123 456 78 | 9 012 345 6 | 78 901 234 | 567 890 12 |
1488 * Octal side: 0 1 carry 3 4 carry ...
1490 * Cycle number: 0 1 2
1492 * But of course we are printing from the high side, so we have to
1493 * figure out where in the cycle we are so that we end up with no
1494 * left over bits at the end.
1496 #define BITS_IN_OCTAL 3
1497 #define HIGH_ZERO 0340
1498 #define LOW_ZERO 0034
1499 #define CARRY_ZERO 0003
1500 static_assert (HIGH_ZERO
+ LOW_ZERO
+ CARRY_ZERO
== 0xff,
1501 "cycle zero constants are wrong");
1502 #define HIGH_ONE 0200
1503 #define MID_ONE 0160
1504 #define LOW_ONE 0016
1505 #define CARRY_ONE 0001
1506 static_assert (HIGH_ONE
+ MID_ONE
+ LOW_ONE
+ CARRY_ONE
== 0xff,
1507 "cycle one constants are wrong");
1508 #define HIGH_TWO 0300
1509 #define MID_TWO 0070
1510 #define LOW_TWO 0007
1511 static_assert (HIGH_TWO
+ MID_TWO
+ LOW_TWO
== 0xff,
1512 "cycle two constants are wrong");
1514 /* For 32 we start in cycle 2, with two bits and one bit carry;
1515 for 64 in cycle in cycle 1, with one bit and a two bit carry. */
1517 cycle
= (len
* HOST_CHAR_BIT
) % BITS_IN_OCTAL
;
1520 gdb_puts ("0", stream
);
1521 bool seen_a_one
= false;
1522 if (byte_order
== BFD_ENDIAN_BIG
)
1531 /* No carry in, carry out two bits. */
1533 octa1
= (HIGH_ZERO
& *p
) >> 5;
1534 octa2
= (LOW_ZERO
& *p
) >> 2;
1535 carry
= (CARRY_ZERO
& *p
);
1536 emit_octal_digit (stream
, &seen_a_one
, octa1
);
1537 emit_octal_digit (stream
, &seen_a_one
, octa2
);
1541 /* Carry in two bits, carry out one bit. */
1543 octa1
= (carry
<< 1) | ((HIGH_ONE
& *p
) >> 7);
1544 octa2
= (MID_ONE
& *p
) >> 4;
1545 octa3
= (LOW_ONE
& *p
) >> 1;
1546 carry
= (CARRY_ONE
& *p
);
1547 emit_octal_digit (stream
, &seen_a_one
, octa1
);
1548 emit_octal_digit (stream
, &seen_a_one
, octa2
);
1549 emit_octal_digit (stream
, &seen_a_one
, octa3
);
1553 /* Carry in one bit, no carry out. */
1555 octa1
= (carry
<< 2) | ((HIGH_TWO
& *p
) >> 6);
1556 octa2
= (MID_TWO
& *p
) >> 3;
1557 octa3
= (LOW_TWO
& *p
);
1559 emit_octal_digit (stream
, &seen_a_one
, octa1
);
1560 emit_octal_digit (stream
, &seen_a_one
, octa2
);
1561 emit_octal_digit (stream
, &seen_a_one
, octa3
);
1565 error (_("Internal error in octal conversion;"));
1569 cycle
= cycle
% BITS_IN_OCTAL
;
1574 for (p
= valaddr
+ len
- 1;
1581 /* Carry out, no carry in */
1583 octa1
= (HIGH_ZERO
& *p
) >> 5;
1584 octa2
= (LOW_ZERO
& *p
) >> 2;
1585 carry
= (CARRY_ZERO
& *p
);
1586 emit_octal_digit (stream
, &seen_a_one
, octa1
);
1587 emit_octal_digit (stream
, &seen_a_one
, octa2
);
1591 /* Carry in, carry out */
1593 octa1
= (carry
<< 1) | ((HIGH_ONE
& *p
) >> 7);
1594 octa2
= (MID_ONE
& *p
) >> 4;
1595 octa3
= (LOW_ONE
& *p
) >> 1;
1596 carry
= (CARRY_ONE
& *p
);
1597 emit_octal_digit (stream
, &seen_a_one
, octa1
);
1598 emit_octal_digit (stream
, &seen_a_one
, octa2
);
1599 emit_octal_digit (stream
, &seen_a_one
, octa3
);
1603 /* Carry in, no carry out */
1605 octa1
= (carry
<< 2) | ((HIGH_TWO
& *p
) >> 6);
1606 octa2
= (MID_TWO
& *p
) >> 3;
1607 octa3
= (LOW_TWO
& *p
);
1609 emit_octal_digit (stream
, &seen_a_one
, octa1
);
1610 emit_octal_digit (stream
, &seen_a_one
, octa2
);
1611 emit_octal_digit (stream
, &seen_a_one
, octa3
);
1615 error (_("Internal error in octal conversion;"));
1619 cycle
= cycle
% BITS_IN_OCTAL
;
1625 /* Possibly negate the integer represented by BYTES. It contains LEN
1626 bytes in the specified byte order. If the integer is negative,
1627 copy it into OUT_VEC, negate it, and return true. Otherwise, do
1628 nothing and return false. */
1631 maybe_negate_by_bytes (const gdb_byte
*bytes
, unsigned len
,
1632 enum bfd_endian byte_order
,
1633 gdb::byte_vector
*out_vec
)
1636 gdb_assert (len
> 0);
1637 if (byte_order
== BFD_ENDIAN_BIG
)
1638 sign_byte
= bytes
[0];
1640 sign_byte
= bytes
[len
- 1];
1641 if ((sign_byte
& 0x80) == 0)
1644 out_vec
->resize (len
);
1646 /* Compute -x == 1 + ~x. */
1647 if (byte_order
== BFD_ENDIAN_LITTLE
)
1650 for (unsigned i
= 0; i
< len
; ++i
)
1652 unsigned tem
= (0xff & ~bytes
[i
]) + carry
;
1653 (*out_vec
)[i
] = tem
& 0xff;
1660 for (unsigned i
= len
; i
> 0; --i
)
1662 unsigned tem
= (0xff & ~bytes
[i
- 1]) + carry
;
1663 (*out_vec
)[i
- 1] = tem
& 0xff;
1671 /* VALADDR points to an integer of LEN bytes.
1672 Print it in decimal on stream or format it in buf. */
1675 print_decimal_chars (struct ui_file
*stream
, const gdb_byte
*valaddr
,
1676 unsigned len
, bool is_signed
,
1677 enum bfd_endian byte_order
)
1680 #define CARRY_OUT( x ) ((x) / TEN) /* extend char to int */
1681 #define CARRY_LEFT( x ) ((x) % TEN)
1682 #define SHIFT( x ) ((x) << 4)
1683 #define LOW_NIBBLE( x ) ( (x) & 0x00F)
1684 #define HIGH_NIBBLE( x ) (((x) & 0x0F0) >> 4)
1689 int i
, j
, decimal_digits
;
1693 gdb::byte_vector negated_bytes
;
1695 && maybe_negate_by_bytes (valaddr
, len
, byte_order
, &negated_bytes
))
1697 gdb_puts ("-", stream
);
1698 valaddr
= negated_bytes
.data ();
1701 /* Base-ten number is less than twice as many digits
1702 as the base 16 number, which is 2 digits per byte. */
1704 decimal_len
= len
* 2 * 2;
1705 std::vector
<unsigned char> digits (decimal_len
, 0);
1707 /* Ok, we have an unknown number of bytes of data to be printed in
1710 * Given a hex number (in nibbles) as XYZ, we start by taking X and
1711 * decimalizing it as "x1 x2" in two decimal nibbles. Then we multiply
1712 * the nibbles by 16, add Y and re-decimalize. Repeat with Z.
1714 * The trick is that "digits" holds a base-10 number, but sometimes
1715 * the individual digits are > 10.
1717 * Outer loop is per nibble (hex digit) of input, from MSD end to
1720 decimal_digits
= 0; /* Number of decimal digits so far */
1721 p
= (byte_order
== BFD_ENDIAN_BIG
) ? valaddr
: valaddr
+ len
- 1;
1723 while ((byte_order
== BFD_ENDIAN_BIG
) ? (p
< valaddr
+ len
) : (p
>= valaddr
))
1726 * Multiply current base-ten number by 16 in place.
1727 * Each digit was between 0 and 9, now is between
1730 for (j
= 0; j
< decimal_digits
; j
++)
1732 digits
[j
] = SHIFT (digits
[j
]);
1735 /* Take the next nibble off the input and add it to what
1736 * we've got in the LSB position. Bottom 'digit' is now
1737 * between 0 and 159.
1739 * "flip" is used to run this loop twice for each byte.
1743 /* Take top nibble. */
1745 digits
[0] += HIGH_NIBBLE (*p
);
1750 /* Take low nibble and bump our pointer "p". */
1752 digits
[0] += LOW_NIBBLE (*p
);
1753 if (byte_order
== BFD_ENDIAN_BIG
)
1760 /* Re-decimalize. We have to do this often enough
1761 * that we don't overflow, but once per nibble is
1762 * overkill. Easier this way, though. Note that the
1763 * carry is often larger than 10 (e.g. max initial
1764 * carry out of lowest nibble is 15, could bubble all
1765 * the way up greater than 10). So we have to do
1766 * the carrying beyond the last current digit.
1769 for (j
= 0; j
< decimal_len
- 1; j
++)
1773 /* "/" won't handle an unsigned char with
1774 * a value that if signed would be negative.
1775 * So extend to longword int via "dummy".
1778 carry
= CARRY_OUT (dummy
);
1779 digits
[j
] = CARRY_LEFT (dummy
);
1781 if (j
>= decimal_digits
&& carry
== 0)
1784 * All higher digits are 0 and we
1785 * no longer have a carry.
1787 * Note: "j" is 0-based, "decimal_digits" is
1790 decimal_digits
= j
+ 1;
1796 /* Ok, now "digits" is the decimal representation, with
1797 the "decimal_digits" actual digits. Print! */
1799 for (i
= decimal_digits
- 1; i
> 0 && digits
[i
] == 0; --i
)
1804 gdb_printf (stream
, "%1d", digits
[i
]);
1808 /* VALADDR points to an integer of LEN bytes. Print it in hex on stream. */
1811 print_hex_chars (struct ui_file
*stream
, const gdb_byte
*valaddr
,
1812 unsigned len
, enum bfd_endian byte_order
,
1817 gdb_puts ("0x", stream
);
1818 if (byte_order
== BFD_ENDIAN_BIG
)
1824 /* Strip leading 0 bytes, but be sure to leave at least a
1825 single byte at the end. */
1826 for (; p
< valaddr
+ len
- 1 && !*p
; ++p
)
1830 const gdb_byte
*first
= p
;
1835 /* When not zero-padding, use a different format for the
1836 very first byte printed. */
1837 if (!zero_pad
&& p
== first
)
1838 gdb_printf (stream
, "%x", *p
);
1840 gdb_printf (stream
, "%02x", *p
);
1845 p
= valaddr
+ len
- 1;
1849 /* Strip leading 0 bytes, but be sure to leave at least a
1850 single byte at the end. */
1851 for (; p
>= valaddr
+ 1 && !*p
; --p
)
1855 const gdb_byte
*first
= p
;
1860 /* When not zero-padding, use a different format for the
1861 very first byte printed. */
1862 if (!zero_pad
&& p
== first
)
1863 gdb_printf (stream
, "%x", *p
);
1865 gdb_printf (stream
, "%02x", *p
);
1870 /* Print function pointer with inferior address ADDRESS onto stdio
1874 print_function_pointer_address (const struct value_print_options
*options
,
1875 struct gdbarch
*gdbarch
,
1877 struct ui_file
*stream
)
1879 CORE_ADDR func_addr
= gdbarch_convert_from_func_ptr_addr
1880 (gdbarch
, address
, current_inferior ()->top_target ());
1882 /* If the function pointer is represented by a description, print
1883 the address of the description. */
1884 if (options
->addressprint
&& func_addr
!= address
)
1886 gdb_puts ("@", stream
);
1887 gdb_puts (paddress (gdbarch
, address
), stream
);
1888 gdb_puts (": ", stream
);
1890 print_address_demangle (options
, gdbarch
, func_addr
, stream
, demangle
);
1894 /* Print on STREAM using the given OPTIONS the index for the element
1895 at INDEX of an array whose index type is INDEX_TYPE. */
1898 maybe_print_array_index (struct type
*index_type
, LONGEST index
,
1899 struct ui_file
*stream
,
1900 const struct value_print_options
*options
)
1902 if (!options
->print_array_indexes
)
1905 current_language
->print_array_index (index_type
, index
, stream
, options
);
1908 /* See valprint.h. */
1911 value_print_array_elements (struct value
*val
, struct ui_file
*stream
,
1913 const struct value_print_options
*options
,
1916 unsigned int things_printed
= 0;
1918 struct type
*elttype
, *index_type
;
1920 /* Position of the array element we are examining to see
1921 whether it is repeated. */
1923 /* Number of repetitions we have detected so far. */
1925 LONGEST low_bound
, high_bound
;
1927 struct type
*type
= check_typedef (value_type (val
));
1929 elttype
= TYPE_TARGET_TYPE (type
);
1930 eltlen
= type_length_units (check_typedef (elttype
));
1931 index_type
= type
->index_type ();
1932 if (index_type
->code () == TYPE_CODE_RANGE
)
1933 index_type
= TYPE_TARGET_TYPE (index_type
);
1935 if (get_array_bounds (type
, &low_bound
, &high_bound
))
1937 /* The array length should normally be HIGH_BOUND - LOW_BOUND +
1938 1. But we have to be a little extra careful, because some
1939 languages such as Ada allow LOW_BOUND to be greater than
1940 HIGH_BOUND for empty arrays. In that situation, the array
1941 length is just zero, not negative! */
1942 if (low_bound
> high_bound
)
1945 len
= high_bound
- low_bound
+ 1;
1949 warning (_("unable to get bounds of array, assuming null array"));
1954 annotate_array_section_begin (i
, elttype
);
1956 for (; i
< len
&& things_printed
< options
->print_max
; i
++)
1958 scoped_value_mark free_values
;
1962 if (options
->prettyformat_arrays
)
1964 gdb_printf (stream
, ",\n");
1965 print_spaces (2 + 2 * recurse
, stream
);
1968 gdb_printf (stream
, ", ");
1970 else if (options
->prettyformat_arrays
)
1972 gdb_printf (stream
, "\n");
1973 print_spaces (2 + 2 * recurse
, stream
);
1975 stream
->wrap_here (2 + 2 * recurse
);
1976 maybe_print_array_index (index_type
, i
+ low_bound
,
1981 /* Only check for reps if repeat_count_threshold is not set to
1982 UINT_MAX (unlimited). */
1983 if (options
->repeat_count_threshold
< UINT_MAX
)
1986 && value_contents_eq (val
, i
* eltlen
,
1995 struct value
*element
= value_from_component (val
, elttype
, eltlen
* i
);
1996 common_val_print (element
, stream
, recurse
+ 1, options
,
1999 if (reps
> options
->repeat_count_threshold
)
2001 annotate_elt_rep (reps
);
2002 gdb_printf (stream
, " %p[<repeats %u times>%p]",
2003 metadata_style
.style ().ptr (), reps
, nullptr);
2004 annotate_elt_rep_end ();
2007 things_printed
+= options
->repeat_count_threshold
;
2015 annotate_array_section_end ();
2017 gdb_printf (stream
, "...");
2018 if (options
->prettyformat_arrays
)
2020 gdb_printf (stream
, "\n");
2021 print_spaces (2 * recurse
, stream
);
2025 /* Return true if print_wchar can display W without resorting to a
2026 numeric escape, false otherwise. */
2029 wchar_printable (gdb_wchar_t w
)
2031 return (gdb_iswprint (w
)
2032 || w
== LCST ('\a') || w
== LCST ('\b')
2033 || w
== LCST ('\f') || w
== LCST ('\n')
2034 || w
== LCST ('\r') || w
== LCST ('\t')
2035 || w
== LCST ('\v'));
2038 /* A helper function that converts the contents of STRING to wide
2039 characters and then appends them to OUTPUT. */
2042 append_string_as_wide (const char *string
,
2043 struct obstack
*output
)
2045 for (; *string
; ++string
)
2047 gdb_wchar_t w
= gdb_btowc (*string
);
2048 obstack_grow (output
, &w
, sizeof (gdb_wchar_t
));
2052 /* Print a wide character W to OUTPUT. ORIG is a pointer to the
2053 original (target) bytes representing the character, ORIG_LEN is the
2054 number of valid bytes. WIDTH is the number of bytes in a base
2055 characters of the type. OUTPUT is an obstack to which wide
2056 characters are emitted. QUOTER is a (narrow) character indicating
2057 the style of quotes surrounding the character to be printed.
2058 NEED_ESCAPE is an in/out flag which is used to track numeric
2059 escapes across calls. */
2062 print_wchar (gdb_wint_t w
, const gdb_byte
*orig
,
2063 int orig_len
, int width
,
2064 enum bfd_endian byte_order
,
2065 struct obstack
*output
,
2066 int quoter
, int *need_escapep
)
2068 int need_escape
= *need_escapep
;
2072 /* iswprint implementation on Windows returns 1 for tab character.
2073 In order to avoid different printout on this host, we explicitly
2074 use wchar_printable function. */
2078 obstack_grow_wstr (output
, LCST ("\\a"));
2081 obstack_grow_wstr (output
, LCST ("\\b"));
2084 obstack_grow_wstr (output
, LCST ("\\f"));
2087 obstack_grow_wstr (output
, LCST ("\\n"));
2090 obstack_grow_wstr (output
, LCST ("\\r"));
2093 obstack_grow_wstr (output
, LCST ("\\t"));
2096 obstack_grow_wstr (output
, LCST ("\\v"));
2100 if (wchar_printable (w
) && (!need_escape
|| (!gdb_iswdigit (w
)
2102 && w
!= LCST ('9'))))
2104 gdb_wchar_t wchar
= w
;
2106 if (w
== gdb_btowc (quoter
) || w
== LCST ('\\'))
2107 obstack_grow_wstr (output
, LCST ("\\"));
2108 obstack_grow (output
, &wchar
, sizeof (gdb_wchar_t
));
2114 for (i
= 0; i
+ width
<= orig_len
; i
+= width
)
2119 value
= extract_unsigned_integer (&orig
[i
], width
,
2121 /* If the value fits in 3 octal digits, print it that
2122 way. Otherwise, print it as a hex escape. */
2124 xsnprintf (octal
, sizeof (octal
), "\\%.3o",
2125 (int) (value
& 0777));
2127 xsnprintf (octal
, sizeof (octal
), "\\x%lx", (long) value
);
2128 append_string_as_wide (octal
, output
);
2130 /* If we somehow have extra bytes, print them now. */
2131 while (i
< orig_len
)
2135 xsnprintf (octal
, sizeof (octal
), "\\%.3o", orig
[i
] & 0xff);
2136 append_string_as_wide (octal
, output
);
2147 /* Print the character C on STREAM as part of the contents of a
2148 literal string whose delimiter is QUOTER. ENCODING names the
2152 generic_emit_char (int c
, struct type
*type
, struct ui_file
*stream
,
2153 int quoter
, const char *encoding
)
2155 enum bfd_endian byte_order
2156 = type_byte_order (type
);
2158 int need_escape
= 0;
2160 c_buf
= (gdb_byte
*) alloca (TYPE_LENGTH (type
));
2161 pack_long (c_buf
, type
, c
);
2163 wchar_iterator
iter (c_buf
, TYPE_LENGTH (type
), encoding
, TYPE_LENGTH (type
));
2165 /* This holds the printable form of the wchar_t data. */
2166 auto_obstack wchar_buf
;
2172 const gdb_byte
*buf
;
2174 int print_escape
= 1;
2175 enum wchar_iterate_result result
;
2177 num_chars
= iter
.iterate (&result
, &chars
, &buf
, &buflen
);
2182 /* If all characters are printable, print them. Otherwise,
2183 we're going to have to print an escape sequence. We
2184 check all characters because we want to print the target
2185 bytes in the escape sequence, and we don't know character
2186 boundaries there. */
2190 for (i
= 0; i
< num_chars
; ++i
)
2191 if (!wchar_printable (chars
[i
]))
2199 for (i
= 0; i
< num_chars
; ++i
)
2200 print_wchar (chars
[i
], buf
, buflen
,
2201 TYPE_LENGTH (type
), byte_order
,
2202 &wchar_buf
, quoter
, &need_escape
);
2206 /* This handles the NUM_CHARS == 0 case as well. */
2208 print_wchar (gdb_WEOF
, buf
, buflen
, TYPE_LENGTH (type
),
2209 byte_order
, &wchar_buf
, quoter
, &need_escape
);
2212 /* The output in the host encoding. */
2213 auto_obstack output
;
2215 convert_between_encodings (INTERMEDIATE_ENCODING
, host_charset (),
2216 (gdb_byte
*) obstack_base (&wchar_buf
),
2217 obstack_object_size (&wchar_buf
),
2218 sizeof (gdb_wchar_t
), &output
, translit_char
);
2219 obstack_1grow (&output
, '\0');
2221 gdb_puts ((const char *) obstack_base (&output
), stream
);
2224 /* Return the repeat count of the next character/byte in ITER,
2225 storing the result in VEC. */
2228 count_next_character (wchar_iterator
*iter
,
2229 std::vector
<converted_character
> *vec
)
2231 struct converted_character
*current
;
2235 struct converted_character tmp
;
2239 = iter
->iterate (&tmp
.result
, &chars
, &tmp
.buf
, &tmp
.buflen
);
2240 if (tmp
.num_chars
> 0)
2242 gdb_assert (tmp
.num_chars
< MAX_WCHARS
);
2243 memcpy (tmp
.chars
, chars
, tmp
.num_chars
* sizeof (gdb_wchar_t
));
2245 vec
->push_back (tmp
);
2248 current
= &vec
->back ();
2250 /* Count repeated characters or bytes. */
2251 current
->repeat_count
= 1;
2252 if (current
->num_chars
== -1)
2260 struct converted_character d
;
2267 /* Get the next character. */
2268 d
.num_chars
= iter
->iterate (&d
.result
, &chars
, &d
.buf
, &d
.buflen
);
2270 /* If a character was successfully converted, save the character
2271 into the converted character. */
2272 if (d
.num_chars
> 0)
2274 gdb_assert (d
.num_chars
< MAX_WCHARS
);
2275 memcpy (d
.chars
, chars
, WCHAR_BUFLEN (d
.num_chars
));
2278 /* Determine if the current character is the same as this
2280 if (d
.num_chars
== current
->num_chars
&& d
.result
== current
->result
)
2282 /* There are two cases to consider:
2284 1) Equality of converted character (num_chars > 0)
2285 2) Equality of non-converted character (num_chars == 0) */
2286 if ((current
->num_chars
> 0
2287 && memcmp (current
->chars
, d
.chars
,
2288 WCHAR_BUFLEN (current
->num_chars
)) == 0)
2289 || (current
->num_chars
== 0
2290 && current
->buflen
== d
.buflen
2291 && memcmp (current
->buf
, d
.buf
, current
->buflen
) == 0))
2292 ++current
->repeat_count
;
2300 /* Push this next converted character onto the result vector. */
2301 repeat
= current
->repeat_count
;
2307 /* Print the characters in CHARS to the OBSTACK. QUOTE_CHAR is the quote
2308 character to use with string output. WIDTH is the size of the output
2309 character type. BYTE_ORDER is the target byte order. OPTIONS
2310 is the user's print options. */
2313 print_converted_chars_to_obstack (struct obstack
*obstack
,
2314 const std::vector
<converted_character
> &chars
,
2315 int quote_char
, int width
,
2316 enum bfd_endian byte_order
,
2317 const struct value_print_options
*options
)
2320 const converted_character
*elem
;
2321 enum {START
, SINGLE
, REPEAT
, INCOMPLETE
, FINISH
} state
, last
;
2322 gdb_wchar_t wide_quote_char
= gdb_btowc (quote_char
);
2323 int need_escape
= 0;
2325 /* Set the start state. */
2327 last
= state
= START
;
2335 /* Nothing to do. */
2342 /* We are outputting a single character
2343 (< options->repeat_count_threshold). */
2347 /* We were outputting some other type of content, so we
2348 must output and a comma and a quote. */
2350 obstack_grow_wstr (obstack
, LCST (", "));
2351 obstack_grow (obstack
, &wide_quote_char
, sizeof (gdb_wchar_t
));
2353 /* Output the character. */
2354 for (j
= 0; j
< elem
->repeat_count
; ++j
)
2356 if (elem
->result
== wchar_iterate_ok
)
2357 print_wchar (elem
->chars
[0], elem
->buf
, elem
->buflen
, width
,
2358 byte_order
, obstack
, quote_char
, &need_escape
);
2360 print_wchar (gdb_WEOF
, elem
->buf
, elem
->buflen
, width
,
2361 byte_order
, obstack
, quote_char
, &need_escape
);
2370 /* We are outputting a character with a repeat count
2371 greater than options->repeat_count_threshold. */
2375 /* We were outputting a single string. Terminate the
2377 obstack_grow (obstack
, &wide_quote_char
, sizeof (gdb_wchar_t
));
2380 obstack_grow_wstr (obstack
, LCST (", "));
2382 /* Output the character and repeat string. */
2383 obstack_grow_wstr (obstack
, LCST ("'"));
2384 if (elem
->result
== wchar_iterate_ok
)
2385 print_wchar (elem
->chars
[0], elem
->buf
, elem
->buflen
, width
,
2386 byte_order
, obstack
, quote_char
, &need_escape
);
2388 print_wchar (gdb_WEOF
, elem
->buf
, elem
->buflen
, width
,
2389 byte_order
, obstack
, quote_char
, &need_escape
);
2390 obstack_grow_wstr (obstack
, LCST ("'"));
2391 std::string s
= string_printf (_(" <repeats %u times>"),
2392 elem
->repeat_count
);
2393 for (j
= 0; s
[j
]; ++j
)
2395 gdb_wchar_t w
= gdb_btowc (s
[j
]);
2396 obstack_grow (obstack
, &w
, sizeof (gdb_wchar_t
));
2402 /* We are outputting an incomplete sequence. */
2405 /* If we were outputting a string of SINGLE characters,
2406 terminate the quote. */
2407 obstack_grow (obstack
, &wide_quote_char
, sizeof (gdb_wchar_t
));
2410 obstack_grow_wstr (obstack
, LCST (", "));
2412 /* Output the incomplete sequence string. */
2413 obstack_grow_wstr (obstack
, LCST ("<incomplete sequence "));
2414 print_wchar (gdb_WEOF
, elem
->buf
, elem
->buflen
, width
, byte_order
,
2415 obstack
, 0, &need_escape
);
2416 obstack_grow_wstr (obstack
, LCST (">"));
2418 /* We do not attempt to output anything after this. */
2423 /* All done. If we were outputting a string of SINGLE
2424 characters, the string must be terminated. Otherwise,
2425 REPEAT and INCOMPLETE are always left properly terminated. */
2427 obstack_grow (obstack
, &wide_quote_char
, sizeof (gdb_wchar_t
));
2432 /* Get the next element and state. */
2434 if (state
!= FINISH
)
2436 elem
= &chars
[idx
++];
2437 switch (elem
->result
)
2439 case wchar_iterate_ok
:
2440 case wchar_iterate_invalid
:
2441 if (elem
->repeat_count
> options
->repeat_count_threshold
)
2447 case wchar_iterate_incomplete
:
2451 case wchar_iterate_eof
:
2459 /* Print the character string STRING, printing at most LENGTH
2460 characters. LENGTH is -1 if the string is nul terminated. TYPE is
2461 the type of each character. OPTIONS holds the printing options;
2462 printing stops early if the number hits print_max; repeat counts
2463 are printed as appropriate. Print ellipses at the end if we had to
2464 stop before printing LENGTH characters, or if FORCE_ELLIPSES.
2465 QUOTE_CHAR is the character to print at each end of the string. If
2466 C_STYLE_TERMINATOR is true, and the last character is 0, then it is
2470 generic_printstr (struct ui_file
*stream
, struct type
*type
,
2471 const gdb_byte
*string
, unsigned int length
,
2472 const char *encoding
, int force_ellipses
,
2473 int quote_char
, int c_style_terminator
,
2474 const struct value_print_options
*options
)
2476 enum bfd_endian byte_order
= type_byte_order (type
);
2478 int width
= TYPE_LENGTH (type
);
2480 struct converted_character
*last
;
2484 unsigned long current_char
= 1;
2486 for (i
= 0; current_char
; ++i
)
2489 current_char
= extract_unsigned_integer (string
+ i
* width
,
2495 /* If the string was not truncated due to `set print elements', and
2496 the last byte of it is a null, we don't print that, in
2497 traditional C style. */
2498 if (c_style_terminator
2501 && (extract_unsigned_integer (string
+ (length
- 1) * width
,
2502 width
, byte_order
) == 0))
2507 gdb_puts ("\"\"", stream
);
2511 /* Arrange to iterate over the characters, in wchar_t form. */
2512 wchar_iterator
iter (string
, length
* width
, encoding
, width
);
2513 std::vector
<converted_character
> converted_chars
;
2515 /* Convert characters until the string is over or the maximum
2516 number of printed characters has been reached. */
2518 while (i
< options
->print_max
)
2524 /* Grab the next character and repeat count. */
2525 r
= count_next_character (&iter
, &converted_chars
);
2527 /* If less than zero, the end of the input string was reached. */
2531 /* Otherwise, add the count to the total print count and get
2532 the next character. */
2536 /* Get the last element and determine if the entire string was
2538 last
= &converted_chars
.back ();
2539 finished
= (last
->result
== wchar_iterate_eof
);
2541 /* Ensure that CONVERTED_CHARS is terminated. */
2542 last
->result
= wchar_iterate_eof
;
2544 /* WCHAR_BUF is the obstack we use to represent the string in
2546 auto_obstack wchar_buf
;
2548 /* Print the output string to the obstack. */
2549 print_converted_chars_to_obstack (&wchar_buf
, converted_chars
, quote_char
,
2550 width
, byte_order
, options
);
2552 if (force_ellipses
|| !finished
)
2553 obstack_grow_wstr (&wchar_buf
, LCST ("..."));
2555 /* OUTPUT is where we collect `char's for printing. */
2556 auto_obstack output
;
2558 convert_between_encodings (INTERMEDIATE_ENCODING
, host_charset (),
2559 (gdb_byte
*) obstack_base (&wchar_buf
),
2560 obstack_object_size (&wchar_buf
),
2561 sizeof (gdb_wchar_t
), &output
, translit_char
);
2562 obstack_1grow (&output
, '\0');
2564 gdb_puts ((const char *) obstack_base (&output
), stream
);
2567 /* Print a string from the inferior, starting at ADDR and printing up to LEN
2568 characters, of WIDTH bytes a piece, to STREAM. If LEN is -1, printing
2569 stops at the first null byte, otherwise printing proceeds (including null
2570 bytes) until either print_max or LEN characters have been printed,
2571 whichever is smaller. ENCODING is the name of the string's
2572 encoding. It can be NULL, in which case the target encoding is
2576 val_print_string (struct type
*elttype
, const char *encoding
,
2577 CORE_ADDR addr
, int len
,
2578 struct ui_file
*stream
,
2579 const struct value_print_options
*options
)
2581 int force_ellipsis
= 0; /* Force ellipsis to be printed if nonzero. */
2582 int err
; /* Non-zero if we got a bad read. */
2583 int found_nul
; /* Non-zero if we found the nul char. */
2584 unsigned int fetchlimit
; /* Maximum number of chars to print. */
2586 gdb::unique_xmalloc_ptr
<gdb_byte
> buffer
; /* Dynamically growable fetch buffer. */
2587 struct gdbarch
*gdbarch
= elttype
->arch ();
2588 enum bfd_endian byte_order
= type_byte_order (elttype
);
2589 int width
= TYPE_LENGTH (elttype
);
2591 /* First we need to figure out the limit on the number of characters we are
2592 going to attempt to fetch and print. This is actually pretty simple. If
2593 LEN >= zero, then the limit is the minimum of LEN and print_max. If
2594 LEN is -1, then the limit is print_max. This is true regardless of
2595 whether print_max is zero, UINT_MAX (unlimited), or something in between,
2596 because finding the null byte (or available memory) is what actually
2597 limits the fetch. */
2599 fetchlimit
= (len
== -1 ? options
->print_max
: std::min ((unsigned) len
,
2600 options
->print_max
));
2602 err
= target_read_string (addr
, len
, width
, fetchlimit
,
2603 &buffer
, &bytes_read
);
2607 /* We now have either successfully filled the buffer to fetchlimit,
2608 or terminated early due to an error or finding a null char when
2611 /* Determine found_nul by looking at the last character read. */
2613 if (bytes_read
>= width
)
2614 found_nul
= extract_unsigned_integer (buffer
.get () + bytes_read
- width
,
2615 width
, byte_order
) == 0;
2616 if (len
== -1 && !found_nul
)
2620 /* We didn't find a NUL terminator we were looking for. Attempt
2621 to peek at the next character. If not successful, or it is not
2622 a null byte, then force ellipsis to be printed. */
2624 peekbuf
= (gdb_byte
*) alloca (width
);
2626 if (target_read_memory (addr
, peekbuf
, width
) == 0
2627 && extract_unsigned_integer (peekbuf
, width
, byte_order
) != 0)
2630 else if ((len
>= 0 && err
!= 0) || (len
> bytes_read
/ width
))
2632 /* Getting an error when we have a requested length, or fetching less
2633 than the number of characters actually requested, always make us
2638 /* If we get an error before fetching anything, don't print a string.
2639 But if we fetch something and then get an error, print the string
2640 and then the error message. */
2641 if (err
== 0 || bytes_read
> 0)
2642 current_language
->printstr (stream
, elttype
, buffer
.get (),
2644 encoding
, force_ellipsis
, options
);
2648 std::string str
= memory_error_message (TARGET_XFER_E_IO
, gdbarch
, addr
);
2650 gdb_printf (stream
, _("<error: %ps>"),
2651 styled_string (metadata_style
.style (),
2655 return (bytes_read
/ width
);
2658 /* Handle 'show print max-depth'. */
2661 show_print_max_depth (struct ui_file
*file
, int from_tty
,
2662 struct cmd_list_element
*c
, const char *value
)
2664 gdb_printf (file
, _("Maximum print depth is %s.\n"), value
);
2668 /* The 'set input-radix' command writes to this auxiliary variable.
2669 If the requested radix is valid, INPUT_RADIX is updated; otherwise,
2670 it is left unchanged. */
2672 static unsigned input_radix_1
= 10;
2674 /* Validate an input or output radix setting, and make sure the user
2675 knows what they really did here. Radix setting is confusing, e.g.
2676 setting the input radix to "10" never changes it! */
2679 set_input_radix (const char *args
, int from_tty
, struct cmd_list_element
*c
)
2681 set_input_radix_1 (from_tty
, input_radix_1
);
2685 set_input_radix_1 (int from_tty
, unsigned radix
)
2687 /* We don't currently disallow any input radix except 0 or 1, which don't
2688 make any mathematical sense. In theory, we can deal with any input
2689 radix greater than 1, even if we don't have unique digits for every
2690 value from 0 to radix-1, but in practice we lose on large radix values.
2691 We should either fix the lossage or restrict the radix range more.
2696 input_radix_1
= input_radix
;
2697 error (_("Nonsense input radix ``decimal %u''; input radix unchanged."),
2700 input_radix_1
= input_radix
= radix
;
2703 gdb_printf (_("Input radix now set to "
2704 "decimal %u, hex %x, octal %o.\n"),
2705 radix
, radix
, radix
);
2709 /* The 'set output-radix' command writes to this auxiliary variable.
2710 If the requested radix is valid, OUTPUT_RADIX is updated,
2711 otherwise, it is left unchanged. */
2713 static unsigned output_radix_1
= 10;
2716 set_output_radix (const char *args
, int from_tty
, struct cmd_list_element
*c
)
2718 set_output_radix_1 (from_tty
, output_radix_1
);
2722 set_output_radix_1 (int from_tty
, unsigned radix
)
2724 /* Validate the radix and disallow ones that we aren't prepared to
2725 handle correctly, leaving the radix unchanged. */
2729 user_print_options
.output_format
= 'x'; /* hex */
2732 user_print_options
.output_format
= 0; /* decimal */
2735 user_print_options
.output_format
= 'o'; /* octal */
2738 output_radix_1
= output_radix
;
2739 error (_("Unsupported output radix ``decimal %u''; "
2740 "output radix unchanged."),
2743 output_radix_1
= output_radix
= radix
;
2746 gdb_printf (_("Output radix now set to "
2747 "decimal %u, hex %x, octal %o.\n"),
2748 radix
, radix
, radix
);
2752 /* Set both the input and output radix at once. Try to set the output radix
2753 first, since it has the most restrictive range. An radix that is valid as
2754 an output radix is also valid as an input radix.
2756 It may be useful to have an unusual input radix. If the user wishes to
2757 set an input radix that is not valid as an output radix, he needs to use
2758 the 'set input-radix' command. */
2761 set_radix (const char *arg
, int from_tty
)
2765 radix
= (arg
== NULL
) ? 10 : parse_and_eval_long (arg
);
2766 set_output_radix_1 (0, radix
);
2767 set_input_radix_1 (0, radix
);
2770 gdb_printf (_("Input and output radices now set to "
2771 "decimal %u, hex %x, octal %o.\n"),
2772 radix
, radix
, radix
);
2776 /* Show both the input and output radices. */
2779 show_radix (const char *arg
, int from_tty
)
2783 if (input_radix
== output_radix
)
2785 gdb_printf (_("Input and output radices set to "
2786 "decimal %u, hex %x, octal %o.\n"),
2787 input_radix
, input_radix
, input_radix
);
2791 gdb_printf (_("Input radix set to decimal "
2792 "%u, hex %x, octal %o.\n"),
2793 input_radix
, input_radix
, input_radix
);
2794 gdb_printf (_("Output radix set to decimal "
2795 "%u, hex %x, octal %o.\n"),
2796 output_radix
, output_radix
, output_radix
);
2802 /* Controls printing of vtbl's. */
2804 show_vtblprint (struct ui_file
*file
, int from_tty
,
2805 struct cmd_list_element
*c
, const char *value
)
2807 gdb_printf (file
, _("\
2808 Printing of C++ virtual function tables is %s.\n"),
2812 /* Controls looking up an object's derived type using what we find in
2815 show_objectprint (struct ui_file
*file
, int from_tty
,
2816 struct cmd_list_element
*c
,
2819 gdb_printf (file
, _("\
2820 Printing of object's derived type based on vtable info is %s.\n"),
2825 show_static_field_print (struct ui_file
*file
, int from_tty
,
2826 struct cmd_list_element
*c
,
2830 _("Printing of C++ static members is %s.\n"),
2836 /* A couple typedefs to make writing the options a bit more
2838 using boolean_option_def
2839 = gdb::option::boolean_option_def
<value_print_options
>;
2840 using uinteger_option_def
2841 = gdb::option::uinteger_option_def
<value_print_options
>;
2842 using zuinteger_unlimited_option_def
2843 = gdb::option::zuinteger_unlimited_option_def
<value_print_options
>;
2845 /* Definitions of options for the "print" and "compile print"
2847 static const gdb::option::option_def value_print_option_defs
[] = {
2849 boolean_option_def
{
2851 [] (value_print_options
*opt
) { return &opt
->addressprint
; },
2852 show_addressprint
, /* show_cmd_cb */
2853 N_("Set printing of addresses."),
2854 N_("Show printing of addresses."),
2855 NULL
, /* help_doc */
2858 boolean_option_def
{
2860 [] (value_print_options
*opt
) { return &opt
->prettyformat_arrays
; },
2861 show_prettyformat_arrays
, /* show_cmd_cb */
2862 N_("Set pretty formatting of arrays."),
2863 N_("Show pretty formatting of arrays."),
2864 NULL
, /* help_doc */
2867 boolean_option_def
{
2869 [] (value_print_options
*opt
) { return &opt
->print_array_indexes
; },
2870 show_print_array_indexes
, /* show_cmd_cb */
2871 N_("Set printing of array indexes."),
2872 N_("Show printing of array indexes."),
2873 NULL
, /* help_doc */
2876 boolean_option_def
{
2878 [] (value_print_options
*opt
) { return &opt
->nibblesprint
; },
2879 show_nibbles
, /* show_cmd_cb */
2880 N_("Set whether to print binary values in groups of four bits."),
2881 N_("Show whether to print binary values in groups of four bits."),
2882 NULL
, /* help_doc */
2885 uinteger_option_def
{
2887 [] (value_print_options
*opt
) { return &opt
->print_max
; },
2888 show_print_max
, /* show_cmd_cb */
2889 N_("Set limit on string chars or array elements to print."),
2890 N_("Show limit on string chars or array elements to print."),
2891 N_("\"unlimited\" causes there to be no limit."),
2894 zuinteger_unlimited_option_def
{
2896 [] (value_print_options
*opt
) { return &opt
->max_depth
; },
2897 show_print_max_depth
, /* show_cmd_cb */
2898 N_("Set maximum print depth for nested structures, unions and arrays."),
2899 N_("Show maximum print depth for nested structures, unions, and arrays."),
2900 N_("When structures, unions, or arrays are nested beyond this depth then they\n\
2901 will be replaced with either '{...}' or '(...)' depending on the language.\n\
2902 Use \"unlimited\" to print the complete structure.")
2905 boolean_option_def
{
2906 "memory-tag-violations",
2907 [] (value_print_options
*opt
) { return &opt
->memory_tag_violations
; },
2908 show_memory_tag_violations
, /* show_cmd_cb */
2909 N_("Set printing of memory tag violations for pointers."),
2910 N_("Show printing of memory tag violations for pointers."),
2911 N_("Issue a warning when the printed value is a pointer\n\
2912 whose logical tag doesn't match the allocation tag of the memory\n\
2913 location it points to."),
2916 boolean_option_def
{
2918 [] (value_print_options
*opt
) { return &opt
->stop_print_at_null
; },
2919 show_stop_print_at_null
, /* show_cmd_cb */
2920 N_("Set printing of char arrays to stop at first null char."),
2921 N_("Show printing of char arrays to stop at first null char."),
2922 NULL
, /* help_doc */
2925 boolean_option_def
{
2927 [] (value_print_options
*opt
) { return &opt
->objectprint
; },
2928 show_objectprint
, /* show_cmd_cb */
2929 _("Set printing of C++ virtual function tables."),
2930 _("Show printing of C++ virtual function tables."),
2931 NULL
, /* help_doc */
2934 boolean_option_def
{
2936 [] (value_print_options
*opt
) { return &opt
->prettyformat_structs
; },
2937 show_prettyformat_structs
, /* show_cmd_cb */
2938 N_("Set pretty formatting of structures."),
2939 N_("Show pretty formatting of structures."),
2940 NULL
, /* help_doc */
2943 boolean_option_def
{
2945 [] (value_print_options
*opt
) { return &opt
->raw
; },
2946 NULL
, /* show_cmd_cb */
2947 N_("Set whether to print values in raw form."),
2948 N_("Show whether to print values in raw form."),
2949 N_("If set, values are printed in raw form, bypassing any\n\
2950 pretty-printers for that value.")
2953 uinteger_option_def
{
2955 [] (value_print_options
*opt
) { return &opt
->repeat_count_threshold
; },
2956 show_repeat_count_threshold
, /* show_cmd_cb */
2957 N_("Set threshold for repeated print elements."),
2958 N_("Show threshold for repeated print elements."),
2959 N_("\"unlimited\" causes all elements to be individually printed."),
2962 boolean_option_def
{
2964 [] (value_print_options
*opt
) { return &opt
->static_field_print
; },
2965 show_static_field_print
, /* show_cmd_cb */
2966 N_("Set printing of C++ static members."),
2967 N_("Show printing of C++ static members."),
2968 NULL
, /* help_doc */
2971 boolean_option_def
{
2973 [] (value_print_options
*opt
) { return &opt
->symbol_print
; },
2974 show_symbol_print
, /* show_cmd_cb */
2975 N_("Set printing of symbol names when printing pointers."),
2976 N_("Show printing of symbol names when printing pointers."),
2977 NULL
, /* help_doc */
2980 boolean_option_def
{
2982 [] (value_print_options
*opt
) { return &opt
->unionprint
; },
2983 show_unionprint
, /* show_cmd_cb */
2984 N_("Set printing of unions interior to structures."),
2985 N_("Show printing of unions interior to structures."),
2986 NULL
, /* help_doc */
2989 boolean_option_def
{
2991 [] (value_print_options
*opt
) { return &opt
->vtblprint
; },
2992 show_vtblprint
, /* show_cmd_cb */
2993 N_("Set printing of C++ virtual function tables."),
2994 N_("Show printing of C++ virtual function tables."),
2995 NULL
, /* help_doc */
2999 /* See valprint.h. */
3001 gdb::option::option_def_group
3002 make_value_print_options_def_group (value_print_options
*opts
)
3004 return {{value_print_option_defs
}, opts
};
3009 /* Test printing of TYPE_CODE_FLAGS values. */
3012 test_print_flags (gdbarch
*arch
)
3014 type
*flags_type
= arch_flags_type (arch
, "test_type", 32);
3015 type
*field_type
= builtin_type (arch
)->builtin_uint32
;
3018 Fields: CCCB BAAA */
3019 append_flags_type_field (flags_type
, 0, 3, field_type
, "A");
3020 append_flags_type_field (flags_type
, 3, 2, field_type
, "B");
3021 append_flags_type_field (flags_type
, 5, 3, field_type
, "C");
3023 value
*val
= allocate_value (flags_type
);
3024 gdb_byte
*contents
= value_contents_writeable (val
).data ();
3025 store_unsigned_integer (contents
, 4, gdbarch_byte_order (arch
), 0xaa);
3028 val_print_type_code_flags (flags_type
, val
, 0, &out
);
3029 SELF_CHECK (out
.string () == "[ A=2 B=1 C=5 ]");
3034 void _initialize_valprint ();
3036 _initialize_valprint ()
3039 selftests::register_test_foreach_arch ("print-flags", test_print_flags
);
3042 set_show_commands setshow_print_cmds
3043 = add_setshow_prefix_cmd ("print", no_class
,
3044 _("Generic command for setting how things print."),
3045 _("Generic command for showing print settings."),
3046 &setprintlist
, &showprintlist
,
3047 &setlist
, &showlist
);
3048 add_alias_cmd ("p", setshow_print_cmds
.set
, no_class
, 1, &setlist
);
3049 /* Prefer set print to set prompt. */
3050 add_alias_cmd ("pr", setshow_print_cmds
.set
, no_class
, 1, &setlist
);
3051 add_alias_cmd ("p", setshow_print_cmds
.show
, no_class
, 1, &showlist
);
3052 add_alias_cmd ("pr", setshow_print_cmds
.show
, no_class
, 1, &showlist
);
3054 set_show_commands setshow_print_raw_cmds
3055 = add_setshow_prefix_cmd
3057 _("Generic command for setting what things to print in \"raw\" mode."),
3058 _("Generic command for showing \"print raw\" settings."),
3059 &setprintrawlist
, &showprintrawlist
, &setprintlist
, &showprintlist
);
3060 deprecate_cmd (setshow_print_raw_cmds
.set
, nullptr);
3061 deprecate_cmd (setshow_print_raw_cmds
.show
, nullptr);
3063 gdb::option::add_setshow_cmds_for_options
3064 (class_support
, &user_print_options
, value_print_option_defs
,
3065 &setprintlist
, &showprintlist
);
3067 add_setshow_zuinteger_cmd ("input-radix", class_support
, &input_radix_1
,
3069 Set default input radix for entering numbers."), _("\
3070 Show default input radix for entering numbers."), NULL
,
3073 &setlist
, &showlist
);
3075 add_setshow_zuinteger_cmd ("output-radix", class_support
, &output_radix_1
,
3077 Set default output radix for printing of values."), _("\
3078 Show default output radix for printing of values."), NULL
,
3081 &setlist
, &showlist
);
3083 /* The "set radix" and "show radix" commands are special in that
3084 they are like normal set and show commands but allow two normally
3085 independent variables to be either set or shown with a single
3086 command. So the usual deprecated_add_set_cmd() and [deleted]
3087 add_show_from_set() commands aren't really appropriate. */
3088 /* FIXME: i18n: With the new add_setshow_integer command, that is no
3089 longer true - show can display anything. */
3090 add_cmd ("radix", class_support
, set_radix
, _("\
3091 Set default input and output number radices.\n\
3092 Use 'set input-radix' or 'set output-radix' to independently set each.\n\
3093 Without an argument, sets both radices back to the default value of 10."),
3095 add_cmd ("radix", class_support
, show_radix
, _("\
3096 Show the default input and output number radices.\n\
3097 Use 'show input-radix' or 'show output-radix' to independently show each."),