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 ();
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 ()))
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 ()))
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 ()))
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 ();
460 struct type
*elttype
= check_typedef (unresolved_elttype
);
462 if (type
->length () > 0 && unresolved_elttype
->length () > 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 ());
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 ());
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 ());
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 (),
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 ()),
836 type_byte_order (type
), type
->is_unsigned (),
837 type
->fixed_point_scaling_factor ());
839 const char *fmt
= type
->length () < 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 ());
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
);
1193 /* Meant to be used in debug sessions, so don't export it in a header file. */
1194 extern void ATTRIBUTE_UNUSED
debug_val (struct value
*val
);
1198 void ATTRIBUTE_UNUSED
1199 debug_val (struct value
*val
)
1201 value_print (val
, gdb_stdlog
, &user_print_options
);
1202 gdb_flush (gdb_stdlog
);
1206 val_print_type_code_flags (struct type
*type
, struct value
*original_value
,
1207 int embedded_offset
, struct ui_file
*stream
)
1209 const gdb_byte
*valaddr
= (value_contents_for_printing (original_value
).data ()
1211 ULONGEST val
= unpack_long (type
, valaddr
);
1212 int field
, nfields
= type
->num_fields ();
1213 struct gdbarch
*gdbarch
= type
->arch ();
1214 struct type
*bool_type
= builtin_type (gdbarch
)->builtin_bool
;
1216 gdb_puts ("[", stream
);
1217 for (field
= 0; field
< nfields
; field
++)
1219 if (type
->field (field
).name ()[0] != '\0')
1221 struct type
*field_type
= type
->field (field
).type ();
1223 if (field_type
== bool_type
1224 /* We require boolean types here to be one bit wide. This is a
1225 problematic place to notify the user of an internal error
1226 though. Instead just fall through and print the field as an
1228 && TYPE_FIELD_BITSIZE (type
, field
) == 1)
1230 if (val
& ((ULONGEST
)1 << type
->field (field
).loc_bitpos ()))
1233 styled_string (variable_name_style
.style (),
1234 type
->field (field
).name ()));
1238 unsigned field_len
= TYPE_FIELD_BITSIZE (type
, field
);
1239 ULONGEST field_val
= val
>> type
->field (field
).loc_bitpos ();
1241 if (field_len
< sizeof (ULONGEST
) * TARGET_CHAR_BIT
)
1242 field_val
&= ((ULONGEST
) 1 << field_len
) - 1;
1243 gdb_printf (stream
, " %ps=",
1244 styled_string (variable_name_style
.style (),
1245 type
->field (field
).name ()));
1246 if (field_type
->code () == TYPE_CODE_ENUM
)
1247 generic_val_print_enum_1 (field_type
, field_val
, stream
);
1249 print_longest (stream
, 'd', 0, field_val
);
1253 gdb_puts (" ]", stream
);
1256 /* See valprint.h. */
1259 value_print_scalar_formatted (struct value
*val
,
1260 const struct value_print_options
*options
,
1262 struct ui_file
*stream
)
1264 struct type
*type
= check_typedef (value_type (val
));
1266 gdb_assert (val
!= NULL
);
1268 /* If we get here with a string format, try again without it. Go
1269 all the way back to the language printers, which may call us
1271 if (options
->format
== 's')
1273 struct value_print_options opts
= *options
;
1276 common_val_print (val
, stream
, 0, &opts
, current_language
);
1280 /* value_contents_for_printing fetches all VAL's contents. They are
1281 needed to check whether VAL is optimized-out or unavailable
1283 const gdb_byte
*valaddr
= value_contents_for_printing (val
).data ();
1285 /* A scalar object that does not have all bits available can't be
1286 printed, because all bits contribute to its representation. */
1287 if (value_bits_any_optimized_out (val
, 0,
1288 TARGET_CHAR_BIT
* type
->length ()))
1289 val_print_optimized_out (val
, stream
);
1290 else if (!value_bytes_available (val
, 0, type
->length ()))
1291 val_print_unavailable (stream
);
1293 print_scalar_formatted (valaddr
, type
, options
, size
, stream
);
1296 /* Print a number according to FORMAT which is one of d,u,x,o,b,h,w,g.
1297 The raison d'etre of this function is to consolidate printing of
1298 LONG_LONG's into this one function. The format chars b,h,w,g are
1299 from print_scalar_formatted(). Numbers are printed using C
1302 USE_C_FORMAT means to use C format in all cases. Without it,
1303 'o' and 'x' format do not include the standard C radix prefix
1306 Hilfinger/2004-09-09: USE_C_FORMAT was originally called USE_LOCAL
1307 and was intended to request formatting according to the current
1308 language and would be used for most integers that GDB prints. The
1309 exceptional cases were things like protocols where the format of
1310 the integer is a protocol thing, not a user-visible thing). The
1311 parameter remains to preserve the information of what things might
1312 be printed with language-specific format, should we ever resurrect
1316 print_longest (struct ui_file
*stream
, int format
, int use_c_format
,
1324 val
= int_string (val_long
, 10, 1, 0, 1); break;
1326 val
= int_string (val_long
, 10, 0, 0, 1); break;
1328 val
= int_string (val_long
, 16, 0, 0, use_c_format
); break;
1330 val
= int_string (val_long
, 16, 0, 2, 1); break;
1332 val
= int_string (val_long
, 16, 0, 4, 1); break;
1334 val
= int_string (val_long
, 16, 0, 8, 1); break;
1336 val
= int_string (val_long
, 16, 0, 16, 1); break;
1339 val
= int_string (val_long
, 8, 0, 0, use_c_format
); break;
1341 internal_error (_("failed internal consistency check"));
1343 gdb_puts (val
, stream
);
1346 /* This used to be a macro, but I don't think it is called often enough
1347 to merit such treatment. */
1348 /* Convert a LONGEST to an int. This is used in contexts (e.g. number of
1349 arguments to a function, number in a value history, register number, etc.)
1350 where the value must not be larger than can fit in an int. */
1353 longest_to_int (LONGEST arg
)
1355 /* Let the compiler do the work. */
1356 int rtnval
= (int) arg
;
1358 /* Check for overflows or underflows. */
1359 if (sizeof (LONGEST
) > sizeof (int))
1363 error (_("Value out of range."));
1369 /* Print a floating point value of floating-point type TYPE,
1370 pointed to in GDB by VALADDR, on STREAM. */
1373 print_floating (const gdb_byte
*valaddr
, struct type
*type
,
1374 struct ui_file
*stream
)
1376 std::string str
= target_float_to_string (valaddr
, type
);
1377 gdb_puts (str
.c_str (), stream
);
1381 print_binary_chars (struct ui_file
*stream
, const gdb_byte
*valaddr
,
1382 unsigned len
, enum bfd_endian byte_order
, bool zero_pad
,
1383 const struct value_print_options
*options
)
1388 bool seen_a_one
= false;
1389 const char *digit_separator
= nullptr;
1391 /* Declared "int" so it will be signed.
1392 This ensures that right shift will shift in zeros. */
1394 const int mask
= 0x080;
1396 if (options
->nibblesprint
)
1397 digit_separator
= current_language
->get_digit_separator();
1399 if (byte_order
== BFD_ENDIAN_BIG
)
1405 /* Every byte has 8 binary characters; peel off
1406 and print from the MSB end. */
1408 for (i
= 0; i
< (HOST_CHAR_BIT
* sizeof (*p
)); i
++)
1410 if (options
->nibblesprint
&& seen_a_one
&& i
% 4 == 0)
1411 gdb_putc (*digit_separator
, stream
);
1413 if (*p
& (mask
>> i
))
1418 if (zero_pad
|| seen_a_one
|| b
== '1')
1419 gdb_putc (b
, stream
);
1420 else if (options
->nibblesprint
)
1422 if ((0xf0 & (mask
>> i
) && (*p
& 0xf0))
1423 || (0x0f & (mask
>> i
) && (*p
& 0x0f)))
1424 gdb_putc (b
, stream
);
1434 for (p
= valaddr
+ len
- 1;
1438 for (i
= 0; i
< (HOST_CHAR_BIT
* sizeof (*p
)); i
++)
1440 if (options
->nibblesprint
&& seen_a_one
&& i
% 4 == 0)
1441 gdb_putc (*digit_separator
, stream
);
1443 if (*p
& (mask
>> i
))
1448 if (zero_pad
|| seen_a_one
|| b
== '1')
1449 gdb_putc (b
, stream
);
1450 else if (options
->nibblesprint
)
1452 if ((0xf0 & (mask
>> i
) && (*p
& 0xf0))
1453 || (0x0f & (mask
>> i
) && (*p
& 0x0f)))
1454 gdb_putc (b
, stream
);
1463 /* When not zero-padding, ensure that something is printed when the
1465 if (!zero_pad
&& !seen_a_one
)
1466 gdb_putc ('0', stream
);
1469 /* A helper for print_octal_chars that emits a single octal digit,
1470 optionally suppressing it if is zero and updating SEEN_A_ONE. */
1473 emit_octal_digit (struct ui_file
*stream
, bool *seen_a_one
, int digit
)
1475 if (*seen_a_one
|| digit
!= 0)
1476 gdb_printf (stream
, "%o", digit
);
1481 /* VALADDR points to an integer of LEN bytes.
1482 Print it in octal on stream or format it in buf. */
1485 print_octal_chars (struct ui_file
*stream
, const gdb_byte
*valaddr
,
1486 unsigned len
, enum bfd_endian byte_order
)
1489 unsigned char octa1
, octa2
, octa3
, carry
;
1492 /* Octal is 3 bits, which doesn't fit. Yuk. So we have to track
1493 * the extra bits, which cycle every three bytes:
1495 * Byte side: 0 1 2 3
1497 * bit number 123 456 78 | 9 012 345 6 | 78 901 234 | 567 890 12 |
1499 * Octal side: 0 1 carry 3 4 carry ...
1501 * Cycle number: 0 1 2
1503 * But of course we are printing from the high side, so we have to
1504 * figure out where in the cycle we are so that we end up with no
1505 * left over bits at the end.
1507 #define BITS_IN_OCTAL 3
1508 #define HIGH_ZERO 0340
1509 #define LOW_ZERO 0034
1510 #define CARRY_ZERO 0003
1511 static_assert (HIGH_ZERO
+ LOW_ZERO
+ CARRY_ZERO
== 0xff,
1512 "cycle zero constants are wrong");
1513 #define HIGH_ONE 0200
1514 #define MID_ONE 0160
1515 #define LOW_ONE 0016
1516 #define CARRY_ONE 0001
1517 static_assert (HIGH_ONE
+ MID_ONE
+ LOW_ONE
+ CARRY_ONE
== 0xff,
1518 "cycle one constants are wrong");
1519 #define HIGH_TWO 0300
1520 #define MID_TWO 0070
1521 #define LOW_TWO 0007
1522 static_assert (HIGH_TWO
+ MID_TWO
+ LOW_TWO
== 0xff,
1523 "cycle two constants are wrong");
1525 /* For 32 we start in cycle 2, with two bits and one bit carry;
1526 for 64 in cycle in cycle 1, with one bit and a two bit carry. */
1528 cycle
= (len
* HOST_CHAR_BIT
) % BITS_IN_OCTAL
;
1531 gdb_puts ("0", stream
);
1532 bool seen_a_one
= false;
1533 if (byte_order
== BFD_ENDIAN_BIG
)
1542 /* No carry in, carry out two bits. */
1544 octa1
= (HIGH_ZERO
& *p
) >> 5;
1545 octa2
= (LOW_ZERO
& *p
) >> 2;
1546 carry
= (CARRY_ZERO
& *p
);
1547 emit_octal_digit (stream
, &seen_a_one
, octa1
);
1548 emit_octal_digit (stream
, &seen_a_one
, octa2
);
1552 /* Carry in two bits, carry out one bit. */
1554 octa1
= (carry
<< 1) | ((HIGH_ONE
& *p
) >> 7);
1555 octa2
= (MID_ONE
& *p
) >> 4;
1556 octa3
= (LOW_ONE
& *p
) >> 1;
1557 carry
= (CARRY_ONE
& *p
);
1558 emit_octal_digit (stream
, &seen_a_one
, octa1
);
1559 emit_octal_digit (stream
, &seen_a_one
, octa2
);
1560 emit_octal_digit (stream
, &seen_a_one
, octa3
);
1564 /* Carry in one bit, no carry out. */
1566 octa1
= (carry
<< 2) | ((HIGH_TWO
& *p
) >> 6);
1567 octa2
= (MID_TWO
& *p
) >> 3;
1568 octa3
= (LOW_TWO
& *p
);
1570 emit_octal_digit (stream
, &seen_a_one
, octa1
);
1571 emit_octal_digit (stream
, &seen_a_one
, octa2
);
1572 emit_octal_digit (stream
, &seen_a_one
, octa3
);
1576 error (_("Internal error in octal conversion;"));
1580 cycle
= cycle
% BITS_IN_OCTAL
;
1585 for (p
= valaddr
+ len
- 1;
1592 /* Carry out, no carry in */
1594 octa1
= (HIGH_ZERO
& *p
) >> 5;
1595 octa2
= (LOW_ZERO
& *p
) >> 2;
1596 carry
= (CARRY_ZERO
& *p
);
1597 emit_octal_digit (stream
, &seen_a_one
, octa1
);
1598 emit_octal_digit (stream
, &seen_a_one
, octa2
);
1602 /* Carry in, carry out */
1604 octa1
= (carry
<< 1) | ((HIGH_ONE
& *p
) >> 7);
1605 octa2
= (MID_ONE
& *p
) >> 4;
1606 octa3
= (LOW_ONE
& *p
) >> 1;
1607 carry
= (CARRY_ONE
& *p
);
1608 emit_octal_digit (stream
, &seen_a_one
, octa1
);
1609 emit_octal_digit (stream
, &seen_a_one
, octa2
);
1610 emit_octal_digit (stream
, &seen_a_one
, octa3
);
1614 /* Carry in, no carry out */
1616 octa1
= (carry
<< 2) | ((HIGH_TWO
& *p
) >> 6);
1617 octa2
= (MID_TWO
& *p
) >> 3;
1618 octa3
= (LOW_TWO
& *p
);
1620 emit_octal_digit (stream
, &seen_a_one
, octa1
);
1621 emit_octal_digit (stream
, &seen_a_one
, octa2
);
1622 emit_octal_digit (stream
, &seen_a_one
, octa3
);
1626 error (_("Internal error in octal conversion;"));
1630 cycle
= cycle
% BITS_IN_OCTAL
;
1636 /* Possibly negate the integer represented by BYTES. It contains LEN
1637 bytes in the specified byte order. If the integer is negative,
1638 copy it into OUT_VEC, negate it, and return true. Otherwise, do
1639 nothing and return false. */
1642 maybe_negate_by_bytes (const gdb_byte
*bytes
, unsigned len
,
1643 enum bfd_endian byte_order
,
1644 gdb::byte_vector
*out_vec
)
1647 gdb_assert (len
> 0);
1648 if (byte_order
== BFD_ENDIAN_BIG
)
1649 sign_byte
= bytes
[0];
1651 sign_byte
= bytes
[len
- 1];
1652 if ((sign_byte
& 0x80) == 0)
1655 out_vec
->resize (len
);
1657 /* Compute -x == 1 + ~x. */
1658 if (byte_order
== BFD_ENDIAN_LITTLE
)
1661 for (unsigned i
= 0; i
< len
; ++i
)
1663 unsigned tem
= (0xff & ~bytes
[i
]) + carry
;
1664 (*out_vec
)[i
] = tem
& 0xff;
1671 for (unsigned i
= len
; i
> 0; --i
)
1673 unsigned tem
= (0xff & ~bytes
[i
- 1]) + carry
;
1674 (*out_vec
)[i
- 1] = tem
& 0xff;
1682 /* VALADDR points to an integer of LEN bytes.
1683 Print it in decimal on stream or format it in buf. */
1686 print_decimal_chars (struct ui_file
*stream
, const gdb_byte
*valaddr
,
1687 unsigned len
, bool is_signed
,
1688 enum bfd_endian byte_order
)
1691 #define CARRY_OUT( x ) ((x) / TEN) /* extend char to int */
1692 #define CARRY_LEFT( x ) ((x) % TEN)
1693 #define SHIFT( x ) ((x) << 4)
1694 #define LOW_NIBBLE( x ) ( (x) & 0x00F)
1695 #define HIGH_NIBBLE( x ) (((x) & 0x0F0) >> 4)
1700 int i
, j
, decimal_digits
;
1704 gdb::byte_vector negated_bytes
;
1706 && maybe_negate_by_bytes (valaddr
, len
, byte_order
, &negated_bytes
))
1708 gdb_puts ("-", stream
);
1709 valaddr
= negated_bytes
.data ();
1712 /* Base-ten number is less than twice as many digits
1713 as the base 16 number, which is 2 digits per byte. */
1715 decimal_len
= len
* 2 * 2;
1716 std::vector
<unsigned char> digits (decimal_len
, 0);
1718 /* Ok, we have an unknown number of bytes of data to be printed in
1721 * Given a hex number (in nibbles) as XYZ, we start by taking X and
1722 * decimalizing it as "x1 x2" in two decimal nibbles. Then we multiply
1723 * the nibbles by 16, add Y and re-decimalize. Repeat with Z.
1725 * The trick is that "digits" holds a base-10 number, but sometimes
1726 * the individual digits are > 10.
1728 * Outer loop is per nibble (hex digit) of input, from MSD end to
1731 decimal_digits
= 0; /* Number of decimal digits so far */
1732 p
= (byte_order
== BFD_ENDIAN_BIG
) ? valaddr
: valaddr
+ len
- 1;
1734 while ((byte_order
== BFD_ENDIAN_BIG
) ? (p
< valaddr
+ len
) : (p
>= valaddr
))
1737 * Multiply current base-ten number by 16 in place.
1738 * Each digit was between 0 and 9, now is between
1741 for (j
= 0; j
< decimal_digits
; j
++)
1743 digits
[j
] = SHIFT (digits
[j
]);
1746 /* Take the next nibble off the input and add it to what
1747 * we've got in the LSB position. Bottom 'digit' is now
1748 * between 0 and 159.
1750 * "flip" is used to run this loop twice for each byte.
1754 /* Take top nibble. */
1756 digits
[0] += HIGH_NIBBLE (*p
);
1761 /* Take low nibble and bump our pointer "p". */
1763 digits
[0] += LOW_NIBBLE (*p
);
1764 if (byte_order
== BFD_ENDIAN_BIG
)
1771 /* Re-decimalize. We have to do this often enough
1772 * that we don't overflow, but once per nibble is
1773 * overkill. Easier this way, though. Note that the
1774 * carry is often larger than 10 (e.g. max initial
1775 * carry out of lowest nibble is 15, could bubble all
1776 * the way up greater than 10). So we have to do
1777 * the carrying beyond the last current digit.
1780 for (j
= 0; j
< decimal_len
- 1; j
++)
1784 /* "/" won't handle an unsigned char with
1785 * a value that if signed would be negative.
1786 * So extend to longword int via "dummy".
1789 carry
= CARRY_OUT (dummy
);
1790 digits
[j
] = CARRY_LEFT (dummy
);
1792 if (j
>= decimal_digits
&& carry
== 0)
1795 * All higher digits are 0 and we
1796 * no longer have a carry.
1798 * Note: "j" is 0-based, "decimal_digits" is
1801 decimal_digits
= j
+ 1;
1807 /* Ok, now "digits" is the decimal representation, with
1808 the "decimal_digits" actual digits. Print! */
1810 for (i
= decimal_digits
- 1; i
> 0 && digits
[i
] == 0; --i
)
1815 gdb_printf (stream
, "%1d", digits
[i
]);
1819 /* VALADDR points to an integer of LEN bytes. Print it in hex on stream. */
1822 print_hex_chars (struct ui_file
*stream
, const gdb_byte
*valaddr
,
1823 unsigned len
, enum bfd_endian byte_order
,
1828 gdb_puts ("0x", stream
);
1829 if (byte_order
== BFD_ENDIAN_BIG
)
1835 /* Strip leading 0 bytes, but be sure to leave at least a
1836 single byte at the end. */
1837 for (; p
< valaddr
+ len
- 1 && !*p
; ++p
)
1841 const gdb_byte
*first
= p
;
1846 /* When not zero-padding, use a different format for the
1847 very first byte printed. */
1848 if (!zero_pad
&& p
== first
)
1849 gdb_printf (stream
, "%x", *p
);
1851 gdb_printf (stream
, "%02x", *p
);
1856 p
= valaddr
+ len
- 1;
1860 /* Strip leading 0 bytes, but be sure to leave at least a
1861 single byte at the end. */
1862 for (; p
>= valaddr
+ 1 && !*p
; --p
)
1866 const gdb_byte
*first
= p
;
1871 /* When not zero-padding, use a different format for the
1872 very first byte printed. */
1873 if (!zero_pad
&& p
== first
)
1874 gdb_printf (stream
, "%x", *p
);
1876 gdb_printf (stream
, "%02x", *p
);
1881 /* Print function pointer with inferior address ADDRESS onto stdio
1885 print_function_pointer_address (const struct value_print_options
*options
,
1886 struct gdbarch
*gdbarch
,
1888 struct ui_file
*stream
)
1890 CORE_ADDR func_addr
= gdbarch_convert_from_func_ptr_addr
1891 (gdbarch
, address
, current_inferior ()->top_target ());
1893 /* If the function pointer is represented by a description, print
1894 the address of the description. */
1895 if (options
->addressprint
&& func_addr
!= address
)
1897 gdb_puts ("@", stream
);
1898 gdb_puts (paddress (gdbarch
, address
), stream
);
1899 gdb_puts (": ", stream
);
1901 print_address_demangle (options
, gdbarch
, func_addr
, stream
, demangle
);
1905 /* Print on STREAM using the given OPTIONS the index for the element
1906 at INDEX of an array whose index type is INDEX_TYPE. */
1909 maybe_print_array_index (struct type
*index_type
, LONGEST index
,
1910 struct ui_file
*stream
,
1911 const struct value_print_options
*options
)
1913 if (!options
->print_array_indexes
)
1916 current_language
->print_array_index (index_type
, index
, stream
, options
);
1919 /* See valprint.h. */
1922 value_print_array_elements (struct value
*val
, struct ui_file
*stream
,
1924 const struct value_print_options
*options
,
1927 unsigned int things_printed
= 0;
1929 struct type
*elttype
, *index_type
;
1930 /* Position of the array element we are examining to see
1931 whether it is repeated. */
1933 /* Number of repetitions we have detected so far. */
1935 LONGEST low_bound
, high_bound
;
1937 struct type
*type
= check_typedef (value_type (val
));
1939 elttype
= type
->target_type ();
1940 unsigned bit_stride
= type
->bit_stride ();
1941 if (bit_stride
== 0)
1942 bit_stride
= 8 * check_typedef (elttype
)->length ();
1943 index_type
= type
->index_type ();
1944 if (index_type
->code () == TYPE_CODE_RANGE
)
1945 index_type
= index_type
->target_type ();
1947 if (get_array_bounds (type
, &low_bound
, &high_bound
))
1949 /* The array length should normally be HIGH_BOUND - LOW_BOUND +
1950 1. But we have to be a little extra careful, because some
1951 languages such as Ada allow LOW_BOUND to be greater than
1952 HIGH_BOUND for empty arrays. In that situation, the array
1953 length is just zero, not negative! */
1954 if (low_bound
> high_bound
)
1957 len
= high_bound
- low_bound
+ 1;
1961 warning (_("unable to get bounds of array, assuming null array"));
1966 annotate_array_section_begin (i
, elttype
);
1968 for (; i
< len
&& things_printed
< options
->print_max
; i
++)
1970 scoped_value_mark free_values
;
1974 if (options
->prettyformat_arrays
)
1976 gdb_printf (stream
, ",\n");
1977 print_spaces (2 + 2 * recurse
, stream
);
1980 gdb_printf (stream
, ", ");
1982 else if (options
->prettyformat_arrays
)
1984 gdb_printf (stream
, "\n");
1985 print_spaces (2 + 2 * recurse
, stream
);
1987 stream
->wrap_here (2 + 2 * recurse
);
1988 maybe_print_array_index (index_type
, i
+ low_bound
,
1991 struct value
*element
= value_from_component_bitsize (val
, elttype
,
1996 /* Only check for reps if repeat_count_threshold is not set to
1997 UINT_MAX (unlimited). */
1998 if (options
->repeat_count_threshold
< UINT_MAX
)
2002 struct value
*rep_elt
2003 = value_from_component_bitsize (val
, elttype
,
2006 if (!value_contents_eq (element
, rep_elt
))
2013 common_val_print (element
, stream
, recurse
+ 1, options
,
2016 if (reps
> options
->repeat_count_threshold
)
2018 annotate_elt_rep (reps
);
2019 gdb_printf (stream
, " %p[<repeats %u times>%p]",
2020 metadata_style
.style ().ptr (), reps
, nullptr);
2021 annotate_elt_rep_end ();
2024 things_printed
+= options
->repeat_count_threshold
;
2032 annotate_array_section_end ();
2034 gdb_printf (stream
, "...");
2035 if (options
->prettyformat_arrays
)
2037 gdb_printf (stream
, "\n");
2038 print_spaces (2 * recurse
, stream
);
2042 /* Return true if print_wchar can display W without resorting to a
2043 numeric escape, false otherwise. */
2046 wchar_printable (gdb_wchar_t w
)
2048 return (gdb_iswprint (w
)
2049 || w
== LCST ('\a') || w
== LCST ('\b')
2050 || w
== LCST ('\f') || w
== LCST ('\n')
2051 || w
== LCST ('\r') || w
== LCST ('\t')
2052 || w
== LCST ('\v'));
2055 /* A helper function that converts the contents of STRING to wide
2056 characters and then appends them to OUTPUT. */
2059 append_string_as_wide (const char *string
,
2060 struct obstack
*output
)
2062 for (; *string
; ++string
)
2064 gdb_wchar_t w
= gdb_btowc (*string
);
2065 obstack_grow (output
, &w
, sizeof (gdb_wchar_t
));
2069 /* Print a wide character W to OUTPUT. ORIG is a pointer to the
2070 original (target) bytes representing the character, ORIG_LEN is the
2071 number of valid bytes. WIDTH is the number of bytes in a base
2072 characters of the type. OUTPUT is an obstack to which wide
2073 characters are emitted. QUOTER is a (narrow) character indicating
2074 the style of quotes surrounding the character to be printed.
2075 NEED_ESCAPE is an in/out flag which is used to track numeric
2076 escapes across calls. */
2079 print_wchar (gdb_wint_t w
, const gdb_byte
*orig
,
2080 int orig_len
, int width
,
2081 enum bfd_endian byte_order
,
2082 struct obstack
*output
,
2083 int quoter
, bool *need_escapep
)
2085 bool need_escape
= *need_escapep
;
2087 *need_escapep
= false;
2089 /* If any additional cases are added to this switch block, then the
2090 function wchar_printable will likely need updating too. */
2094 obstack_grow_wstr (output
, LCST ("\\a"));
2097 obstack_grow_wstr (output
, LCST ("\\b"));
2100 obstack_grow_wstr (output
, LCST ("\\f"));
2103 obstack_grow_wstr (output
, LCST ("\\n"));
2106 obstack_grow_wstr (output
, LCST ("\\r"));
2109 obstack_grow_wstr (output
, LCST ("\\t"));
2112 obstack_grow_wstr (output
, LCST ("\\v"));
2116 if (gdb_iswprint (w
) && !(need_escape
&& gdb_iswxdigit (w
)))
2118 gdb_wchar_t wchar
= w
;
2120 if (w
== gdb_btowc (quoter
) || w
== LCST ('\\'))
2121 obstack_grow_wstr (output
, LCST ("\\"));
2122 obstack_grow (output
, &wchar
, sizeof (gdb_wchar_t
));
2128 for (i
= 0; i
+ width
<= orig_len
; i
+= width
)
2133 value
= extract_unsigned_integer (&orig
[i
], width
,
2135 /* If the value fits in 3 octal digits, print it that
2136 way. Otherwise, print it as a hex escape. */
2139 xsnprintf (octal
, sizeof (octal
), "\\%.3o",
2140 (int) (value
& 0777));
2141 *need_escapep
= false;
2145 xsnprintf (octal
, sizeof (octal
), "\\x%lx", (long) value
);
2146 /* A hex escape might require the next character
2147 to be escaped, because, unlike with octal,
2148 hex escapes have no length limit. */
2149 *need_escapep
= true;
2151 append_string_as_wide (octal
, output
);
2153 /* If we somehow have extra bytes, print them now. */
2154 while (i
< orig_len
)
2158 xsnprintf (octal
, sizeof (octal
), "\\%.3o", orig
[i
] & 0xff);
2159 *need_escapep
= false;
2160 append_string_as_wide (octal
, output
);
2169 /* Print the character C on STREAM as part of the contents of a
2170 literal string whose delimiter is QUOTER. ENCODING names the
2174 generic_emit_char (int c
, struct type
*type
, struct ui_file
*stream
,
2175 int quoter
, const char *encoding
)
2177 enum bfd_endian byte_order
2178 = type_byte_order (type
);
2180 bool need_escape
= false;
2182 c_buf
= (gdb_byte
*) alloca (type
->length ());
2183 pack_long (c_buf
, type
, c
);
2185 wchar_iterator
iter (c_buf
, type
->length (), encoding
, type
->length ());
2187 /* This holds the printable form of the wchar_t data. */
2188 auto_obstack wchar_buf
;
2194 const gdb_byte
*buf
;
2196 int print_escape
= 1;
2197 enum wchar_iterate_result result
;
2199 num_chars
= iter
.iterate (&result
, &chars
, &buf
, &buflen
);
2204 /* If all characters are printable, print them. Otherwise,
2205 we're going to have to print an escape sequence. We
2206 check all characters because we want to print the target
2207 bytes in the escape sequence, and we don't know character
2208 boundaries there. */
2212 for (i
= 0; i
< num_chars
; ++i
)
2213 if (!wchar_printable (chars
[i
]))
2221 for (i
= 0; i
< num_chars
; ++i
)
2222 print_wchar (chars
[i
], buf
, buflen
,
2223 type
->length (), byte_order
,
2224 &wchar_buf
, quoter
, &need_escape
);
2228 /* This handles the NUM_CHARS == 0 case as well. */
2230 print_wchar (gdb_WEOF
, buf
, buflen
, type
->length (),
2231 byte_order
, &wchar_buf
, quoter
, &need_escape
);
2234 /* The output in the host encoding. */
2235 auto_obstack output
;
2237 convert_between_encodings (INTERMEDIATE_ENCODING
, host_charset (),
2238 (gdb_byte
*) obstack_base (&wchar_buf
),
2239 obstack_object_size (&wchar_buf
),
2240 sizeof (gdb_wchar_t
), &output
, translit_char
);
2241 obstack_1grow (&output
, '\0');
2243 gdb_puts ((const char *) obstack_base (&output
), stream
);
2246 /* Return the repeat count of the next character/byte in ITER,
2247 storing the result in VEC. */
2250 count_next_character (wchar_iterator
*iter
,
2251 std::vector
<converted_character
> *vec
)
2253 struct converted_character
*current
;
2257 struct converted_character tmp
;
2261 = iter
->iterate (&tmp
.result
, &chars
, &tmp
.buf
, &tmp
.buflen
);
2262 if (tmp
.num_chars
> 0)
2264 gdb_assert (tmp
.num_chars
< MAX_WCHARS
);
2265 memcpy (tmp
.chars
, chars
, tmp
.num_chars
* sizeof (gdb_wchar_t
));
2267 vec
->push_back (tmp
);
2270 current
= &vec
->back ();
2272 /* Count repeated characters or bytes. */
2273 current
->repeat_count
= 1;
2274 if (current
->num_chars
== -1)
2282 struct converted_character d
;
2289 /* Get the next character. */
2290 d
.num_chars
= iter
->iterate (&d
.result
, &chars
, &d
.buf
, &d
.buflen
);
2292 /* If a character was successfully converted, save the character
2293 into the converted character. */
2294 if (d
.num_chars
> 0)
2296 gdb_assert (d
.num_chars
< MAX_WCHARS
);
2297 memcpy (d
.chars
, chars
, WCHAR_BUFLEN (d
.num_chars
));
2300 /* Determine if the current character is the same as this
2302 if (d
.num_chars
== current
->num_chars
&& d
.result
== current
->result
)
2304 /* There are two cases to consider:
2306 1) Equality of converted character (num_chars > 0)
2307 2) Equality of non-converted character (num_chars == 0) */
2308 if ((current
->num_chars
> 0
2309 && memcmp (current
->chars
, d
.chars
,
2310 WCHAR_BUFLEN (current
->num_chars
)) == 0)
2311 || (current
->num_chars
== 0
2312 && current
->buflen
== d
.buflen
2313 && memcmp (current
->buf
, d
.buf
, current
->buflen
) == 0))
2314 ++current
->repeat_count
;
2322 /* Push this next converted character onto the result vector. */
2323 repeat
= current
->repeat_count
;
2329 /* Print the characters in CHARS to the OBSTACK. QUOTE_CHAR is the quote
2330 character to use with string output. WIDTH is the size of the output
2331 character type. BYTE_ORDER is the target byte order. OPTIONS
2332 is the user's print options. */
2335 print_converted_chars_to_obstack (struct obstack
*obstack
,
2336 const std::vector
<converted_character
> &chars
,
2337 int quote_char
, int width
,
2338 enum bfd_endian byte_order
,
2339 const struct value_print_options
*options
)
2342 const converted_character
*elem
;
2343 enum {START
, SINGLE
, REPEAT
, INCOMPLETE
, FINISH
} state
, last
;
2344 gdb_wchar_t wide_quote_char
= gdb_btowc (quote_char
);
2345 bool need_escape
= false;
2347 /* Set the start state. */
2349 last
= state
= START
;
2357 /* Nothing to do. */
2364 /* We are outputting a single character
2365 (< options->repeat_count_threshold). */
2369 /* We were outputting some other type of content, so we
2370 must output and a comma and a quote. */
2372 obstack_grow_wstr (obstack
, LCST (", "));
2373 obstack_grow (obstack
, &wide_quote_char
, sizeof (gdb_wchar_t
));
2375 /* Output the character. */
2376 for (j
= 0; j
< elem
->repeat_count
; ++j
)
2378 if (elem
->result
== wchar_iterate_ok
)
2379 print_wchar (elem
->chars
[0], elem
->buf
, elem
->buflen
, width
,
2380 byte_order
, obstack
, quote_char
, &need_escape
);
2382 print_wchar (gdb_WEOF
, elem
->buf
, elem
->buflen
, width
,
2383 byte_order
, obstack
, quote_char
, &need_escape
);
2392 /* We are outputting a character with a repeat count
2393 greater than options->repeat_count_threshold. */
2397 /* We were outputting a single string. Terminate the
2399 obstack_grow (obstack
, &wide_quote_char
, sizeof (gdb_wchar_t
));
2402 obstack_grow_wstr (obstack
, LCST (", "));
2404 /* Output the character and repeat string. */
2405 obstack_grow_wstr (obstack
, LCST ("'"));
2406 if (elem
->result
== wchar_iterate_ok
)
2407 print_wchar (elem
->chars
[0], elem
->buf
, elem
->buflen
, width
,
2408 byte_order
, obstack
, quote_char
, &need_escape
);
2410 print_wchar (gdb_WEOF
, elem
->buf
, elem
->buflen
, width
,
2411 byte_order
, obstack
, quote_char
, &need_escape
);
2412 obstack_grow_wstr (obstack
, LCST ("'"));
2413 std::string s
= string_printf (_(" <repeats %u times>"),
2414 elem
->repeat_count
);
2415 for (j
= 0; s
[j
]; ++j
)
2417 gdb_wchar_t w
= gdb_btowc (s
[j
]);
2418 obstack_grow (obstack
, &w
, sizeof (gdb_wchar_t
));
2424 /* We are outputting an incomplete sequence. */
2427 /* If we were outputting a string of SINGLE characters,
2428 terminate the quote. */
2429 obstack_grow (obstack
, &wide_quote_char
, sizeof (gdb_wchar_t
));
2432 obstack_grow_wstr (obstack
, LCST (", "));
2434 /* Output the incomplete sequence string. */
2435 obstack_grow_wstr (obstack
, LCST ("<incomplete sequence "));
2436 print_wchar (gdb_WEOF
, elem
->buf
, elem
->buflen
, width
, byte_order
,
2437 obstack
, 0, &need_escape
);
2438 obstack_grow_wstr (obstack
, LCST (">"));
2440 /* We do not attempt to output anything after this. */
2445 /* All done. If we were outputting a string of SINGLE
2446 characters, the string must be terminated. Otherwise,
2447 REPEAT and INCOMPLETE are always left properly terminated. */
2449 obstack_grow (obstack
, &wide_quote_char
, sizeof (gdb_wchar_t
));
2454 /* Get the next element and state. */
2456 if (state
!= FINISH
)
2458 elem
= &chars
[idx
++];
2459 switch (elem
->result
)
2461 case wchar_iterate_ok
:
2462 case wchar_iterate_invalid
:
2463 if (elem
->repeat_count
> options
->repeat_count_threshold
)
2469 case wchar_iterate_incomplete
:
2473 case wchar_iterate_eof
:
2481 /* Print the character string STRING, printing at most LENGTH
2482 characters. LENGTH is -1 if the string is nul terminated. TYPE is
2483 the type of each character. OPTIONS holds the printing options;
2484 printing stops early if the number hits print_max; repeat counts
2485 are printed as appropriate. Print ellipses at the end if we had to
2486 stop before printing LENGTH characters, or if FORCE_ELLIPSES.
2487 QUOTE_CHAR is the character to print at each end of the string. If
2488 C_STYLE_TERMINATOR is true, and the last character is 0, then it is
2492 generic_printstr (struct ui_file
*stream
, struct type
*type
,
2493 const gdb_byte
*string
, unsigned int length
,
2494 const char *encoding
, int force_ellipses
,
2495 int quote_char
, int c_style_terminator
,
2496 const struct value_print_options
*options
)
2498 enum bfd_endian byte_order
= type_byte_order (type
);
2500 int width
= type
->length ();
2502 struct converted_character
*last
;
2506 unsigned long current_char
= 1;
2508 for (i
= 0; current_char
; ++i
)
2511 current_char
= extract_unsigned_integer (string
+ i
* width
,
2517 /* If the string was not truncated due to `set print elements', and
2518 the last byte of it is a null, we don't print that, in
2519 traditional C style. */
2520 if (c_style_terminator
2523 && (extract_unsigned_integer (string
+ (length
- 1) * width
,
2524 width
, byte_order
) == 0))
2529 gdb_printf (stream
, "%c%c", quote_char
, quote_char
);
2533 /* Arrange to iterate over the characters, in wchar_t form. */
2534 wchar_iterator
iter (string
, length
* width
, encoding
, width
);
2535 std::vector
<converted_character
> converted_chars
;
2537 /* Convert characters until the string is over or the maximum
2538 number of printed characters has been reached. */
2540 while (i
< options
->print_max
)
2546 /* Grab the next character and repeat count. */
2547 r
= count_next_character (&iter
, &converted_chars
);
2549 /* If less than zero, the end of the input string was reached. */
2553 /* Otherwise, add the count to the total print count and get
2554 the next character. */
2558 /* Get the last element and determine if the entire string was
2560 last
= &converted_chars
.back ();
2561 finished
= (last
->result
== wchar_iterate_eof
);
2563 /* Ensure that CONVERTED_CHARS is terminated. */
2564 last
->result
= wchar_iterate_eof
;
2566 /* WCHAR_BUF is the obstack we use to represent the string in
2568 auto_obstack wchar_buf
;
2570 /* Print the output string to the obstack. */
2571 print_converted_chars_to_obstack (&wchar_buf
, converted_chars
, quote_char
,
2572 width
, byte_order
, options
);
2574 if (force_ellipses
|| !finished
)
2575 obstack_grow_wstr (&wchar_buf
, LCST ("..."));
2577 /* OUTPUT is where we collect `char's for printing. */
2578 auto_obstack output
;
2580 convert_between_encodings (INTERMEDIATE_ENCODING
, host_charset (),
2581 (gdb_byte
*) obstack_base (&wchar_buf
),
2582 obstack_object_size (&wchar_buf
),
2583 sizeof (gdb_wchar_t
), &output
, translit_char
);
2584 obstack_1grow (&output
, '\0');
2586 gdb_puts ((const char *) obstack_base (&output
), stream
);
2589 /* Print a string from the inferior, starting at ADDR and printing up to LEN
2590 characters, of WIDTH bytes a piece, to STREAM. If LEN is -1, printing
2591 stops at the first null byte, otherwise printing proceeds (including null
2592 bytes) until either print_max or LEN characters have been printed,
2593 whichever is smaller. ENCODING is the name of the string's
2594 encoding. It can be NULL, in which case the target encoding is
2598 val_print_string (struct type
*elttype
, const char *encoding
,
2599 CORE_ADDR addr
, int len
,
2600 struct ui_file
*stream
,
2601 const struct value_print_options
*options
)
2603 int force_ellipsis
= 0; /* Force ellipsis to be printed if nonzero. */
2604 int err
; /* Non-zero if we got a bad read. */
2605 int found_nul
; /* Non-zero if we found the nul char. */
2606 unsigned int fetchlimit
; /* Maximum number of chars to print. */
2608 gdb::unique_xmalloc_ptr
<gdb_byte
> buffer
; /* Dynamically growable fetch buffer. */
2609 struct gdbarch
*gdbarch
= elttype
->arch ();
2610 enum bfd_endian byte_order
= type_byte_order (elttype
);
2611 int width
= elttype
->length ();
2613 /* First we need to figure out the limit on the number of characters we are
2614 going to attempt to fetch and print. This is actually pretty simple. If
2615 LEN >= zero, then the limit is the minimum of LEN and print_max. If
2616 LEN is -1, then the limit is print_max. This is true regardless of
2617 whether print_max is zero, UINT_MAX (unlimited), or something in between,
2618 because finding the null byte (or available memory) is what actually
2619 limits the fetch. */
2621 fetchlimit
= (len
== -1 ? options
->print_max
: std::min ((unsigned) len
,
2622 options
->print_max
));
2624 err
= target_read_string (addr
, len
, width
, fetchlimit
,
2625 &buffer
, &bytes_read
);
2629 /* We now have either successfully filled the buffer to fetchlimit,
2630 or terminated early due to an error or finding a null char when
2633 /* Determine found_nul by looking at the last character read. */
2635 if (bytes_read
>= width
)
2636 found_nul
= extract_unsigned_integer (buffer
.get () + bytes_read
- width
,
2637 width
, byte_order
) == 0;
2638 if (len
== -1 && !found_nul
)
2642 /* We didn't find a NUL terminator we were looking for. Attempt
2643 to peek at the next character. If not successful, or it is not
2644 a null byte, then force ellipsis to be printed. */
2646 peekbuf
= (gdb_byte
*) alloca (width
);
2648 if (target_read_memory (addr
, peekbuf
, width
) == 0
2649 && extract_unsigned_integer (peekbuf
, width
, byte_order
) != 0)
2652 else if ((len
>= 0 && err
!= 0) || (len
> bytes_read
/ width
))
2654 /* Getting an error when we have a requested length, or fetching less
2655 than the number of characters actually requested, always make us
2660 /* If we get an error before fetching anything, don't print a string.
2661 But if we fetch something and then get an error, print the string
2662 and then the error message. */
2663 if (err
== 0 || bytes_read
> 0)
2664 current_language
->printstr (stream
, elttype
, buffer
.get (),
2666 encoding
, force_ellipsis
, options
);
2670 std::string str
= memory_error_message (TARGET_XFER_E_IO
, gdbarch
, addr
);
2672 gdb_printf (stream
, _("<error: %ps>"),
2673 styled_string (metadata_style
.style (),
2677 return (bytes_read
/ width
);
2680 /* Handle 'show print max-depth'. */
2683 show_print_max_depth (struct ui_file
*file
, int from_tty
,
2684 struct cmd_list_element
*c
, const char *value
)
2686 gdb_printf (file
, _("Maximum print depth is %s.\n"), value
);
2690 /* The 'set input-radix' command writes to this auxiliary variable.
2691 If the requested radix is valid, INPUT_RADIX is updated; otherwise,
2692 it is left unchanged. */
2694 static unsigned input_radix_1
= 10;
2696 /* Validate an input or output radix setting, and make sure the user
2697 knows what they really did here. Radix setting is confusing, e.g.
2698 setting the input radix to "10" never changes it! */
2701 set_input_radix (const char *args
, int from_tty
, struct cmd_list_element
*c
)
2703 set_input_radix_1 (from_tty
, input_radix_1
);
2707 set_input_radix_1 (int from_tty
, unsigned radix
)
2709 /* We don't currently disallow any input radix except 0 or 1, which don't
2710 make any mathematical sense. In theory, we can deal with any input
2711 radix greater than 1, even if we don't have unique digits for every
2712 value from 0 to radix-1, but in practice we lose on large radix values.
2713 We should either fix the lossage or restrict the radix range more.
2718 input_radix_1
= input_radix
;
2719 error (_("Nonsense input radix ``decimal %u''; input radix unchanged."),
2722 input_radix_1
= input_radix
= radix
;
2725 gdb_printf (_("Input radix now set to "
2726 "decimal %u, hex %x, octal %o.\n"),
2727 radix
, radix
, radix
);
2731 /* The 'set output-radix' command writes to this auxiliary variable.
2732 If the requested radix is valid, OUTPUT_RADIX is updated,
2733 otherwise, it is left unchanged. */
2735 static unsigned output_radix_1
= 10;
2738 set_output_radix (const char *args
, int from_tty
, struct cmd_list_element
*c
)
2740 set_output_radix_1 (from_tty
, output_radix_1
);
2744 set_output_radix_1 (int from_tty
, unsigned radix
)
2746 /* Validate the radix and disallow ones that we aren't prepared to
2747 handle correctly, leaving the radix unchanged. */
2751 user_print_options
.output_format
= 'x'; /* hex */
2754 user_print_options
.output_format
= 0; /* decimal */
2757 user_print_options
.output_format
= 'o'; /* octal */
2760 output_radix_1
= output_radix
;
2761 error (_("Unsupported output radix ``decimal %u''; "
2762 "output radix unchanged."),
2765 output_radix_1
= output_radix
= radix
;
2768 gdb_printf (_("Output radix now set to "
2769 "decimal %u, hex %x, octal %o.\n"),
2770 radix
, radix
, radix
);
2774 /* Set both the input and output radix at once. Try to set the output radix
2775 first, since it has the most restrictive range. An radix that is valid as
2776 an output radix is also valid as an input radix.
2778 It may be useful to have an unusual input radix. If the user wishes to
2779 set an input radix that is not valid as an output radix, he needs to use
2780 the 'set input-radix' command. */
2783 set_radix (const char *arg
, int from_tty
)
2787 radix
= (arg
== NULL
) ? 10 : parse_and_eval_long (arg
);
2788 set_output_radix_1 (0, radix
);
2789 set_input_radix_1 (0, radix
);
2792 gdb_printf (_("Input and output radices now set to "
2793 "decimal %u, hex %x, octal %o.\n"),
2794 radix
, radix
, radix
);
2798 /* Show both the input and output radices. */
2801 show_radix (const char *arg
, int from_tty
)
2805 if (input_radix
== output_radix
)
2807 gdb_printf (_("Input and output radices set to "
2808 "decimal %u, hex %x, octal %o.\n"),
2809 input_radix
, input_radix
, input_radix
);
2813 gdb_printf (_("Input radix set to decimal "
2814 "%u, hex %x, octal %o.\n"),
2815 input_radix
, input_radix
, input_radix
);
2816 gdb_printf (_("Output radix set to decimal "
2817 "%u, hex %x, octal %o.\n"),
2818 output_radix
, output_radix
, output_radix
);
2824 /* Controls printing of vtbl's. */
2826 show_vtblprint (struct ui_file
*file
, int from_tty
,
2827 struct cmd_list_element
*c
, const char *value
)
2829 gdb_printf (file
, _("\
2830 Printing of C++ virtual function tables is %s.\n"),
2834 /* Controls looking up an object's derived type using what we find in
2837 show_objectprint (struct ui_file
*file
, int from_tty
,
2838 struct cmd_list_element
*c
,
2841 gdb_printf (file
, _("\
2842 Printing of object's derived type based on vtable info is %s.\n"),
2847 show_static_field_print (struct ui_file
*file
, int from_tty
,
2848 struct cmd_list_element
*c
,
2852 _("Printing of C++ static members is %s.\n"),
2858 /* A couple typedefs to make writing the options a bit more
2860 using boolean_option_def
2861 = gdb::option::boolean_option_def
<value_print_options
>;
2862 using uinteger_option_def
2863 = gdb::option::uinteger_option_def
<value_print_options
>;
2864 using zuinteger_unlimited_option_def
2865 = gdb::option::zuinteger_unlimited_option_def
<value_print_options
>;
2867 /* Definitions of options for the "print" and "compile print"
2869 static const gdb::option::option_def value_print_option_defs
[] = {
2871 boolean_option_def
{
2873 [] (value_print_options
*opt
) { return &opt
->addressprint
; },
2874 show_addressprint
, /* show_cmd_cb */
2875 N_("Set printing of addresses."),
2876 N_("Show printing of addresses."),
2877 NULL
, /* help_doc */
2880 boolean_option_def
{
2882 [] (value_print_options
*opt
) { return &opt
->prettyformat_arrays
; },
2883 show_prettyformat_arrays
, /* show_cmd_cb */
2884 N_("Set pretty formatting of arrays."),
2885 N_("Show pretty formatting of arrays."),
2886 NULL
, /* help_doc */
2889 boolean_option_def
{
2891 [] (value_print_options
*opt
) { return &opt
->print_array_indexes
; },
2892 show_print_array_indexes
, /* show_cmd_cb */
2893 N_("Set printing of array indexes."),
2894 N_("Show printing of array indexes."),
2895 NULL
, /* help_doc */
2898 boolean_option_def
{
2900 [] (value_print_options
*opt
) { return &opt
->nibblesprint
; },
2901 show_nibbles
, /* show_cmd_cb */
2902 N_("Set whether to print binary values in groups of four bits."),
2903 N_("Show whether to print binary values in groups of four bits."),
2904 NULL
, /* help_doc */
2907 uinteger_option_def
{
2909 [] (value_print_options
*opt
) { return &opt
->print_max
; },
2910 show_print_max
, /* show_cmd_cb */
2911 N_("Set limit on string chars or array elements to print."),
2912 N_("Show limit on string chars or array elements to print."),
2913 N_("\"unlimited\" causes there to be no limit."),
2916 zuinteger_unlimited_option_def
{
2918 [] (value_print_options
*opt
) { return &opt
->max_depth
; },
2919 show_print_max_depth
, /* show_cmd_cb */
2920 N_("Set maximum print depth for nested structures, unions and arrays."),
2921 N_("Show maximum print depth for nested structures, unions, and arrays."),
2922 N_("When structures, unions, or arrays are nested beyond this depth then they\n\
2923 will be replaced with either '{...}' or '(...)' depending on the language.\n\
2924 Use \"unlimited\" to print the complete structure.")
2927 boolean_option_def
{
2928 "memory-tag-violations",
2929 [] (value_print_options
*opt
) { return &opt
->memory_tag_violations
; },
2930 show_memory_tag_violations
, /* show_cmd_cb */
2931 N_("Set printing of memory tag violations for pointers."),
2932 N_("Show printing of memory tag violations for pointers."),
2933 N_("Issue a warning when the printed value is a pointer\n\
2934 whose logical tag doesn't match the allocation tag of the memory\n\
2935 location it points to."),
2938 boolean_option_def
{
2940 [] (value_print_options
*opt
) { return &opt
->stop_print_at_null
; },
2941 show_stop_print_at_null
, /* show_cmd_cb */
2942 N_("Set printing of char arrays to stop at first null char."),
2943 N_("Show printing of char arrays to stop at first null char."),
2944 NULL
, /* help_doc */
2947 boolean_option_def
{
2949 [] (value_print_options
*opt
) { return &opt
->objectprint
; },
2950 show_objectprint
, /* show_cmd_cb */
2951 _("Set printing of C++ virtual function tables."),
2952 _("Show printing of C++ virtual function tables."),
2953 NULL
, /* help_doc */
2956 boolean_option_def
{
2958 [] (value_print_options
*opt
) { return &opt
->prettyformat_structs
; },
2959 show_prettyformat_structs
, /* show_cmd_cb */
2960 N_("Set pretty formatting of structures."),
2961 N_("Show pretty formatting of structures."),
2962 NULL
, /* help_doc */
2965 boolean_option_def
{
2967 [] (value_print_options
*opt
) { return &opt
->raw
; },
2968 NULL
, /* show_cmd_cb */
2969 N_("Set whether to print values in raw form."),
2970 N_("Show whether to print values in raw form."),
2971 N_("If set, values are printed in raw form, bypassing any\n\
2972 pretty-printers for that value.")
2975 uinteger_option_def
{
2977 [] (value_print_options
*opt
) { return &opt
->repeat_count_threshold
; },
2978 show_repeat_count_threshold
, /* show_cmd_cb */
2979 N_("Set threshold for repeated print elements."),
2980 N_("Show threshold for repeated print elements."),
2981 N_("\"unlimited\" causes all elements to be individually printed."),
2984 boolean_option_def
{
2986 [] (value_print_options
*opt
) { return &opt
->static_field_print
; },
2987 show_static_field_print
, /* show_cmd_cb */
2988 N_("Set printing of C++ static members."),
2989 N_("Show printing of C++ static members."),
2990 NULL
, /* help_doc */
2993 boolean_option_def
{
2995 [] (value_print_options
*opt
) { return &opt
->symbol_print
; },
2996 show_symbol_print
, /* show_cmd_cb */
2997 N_("Set printing of symbol names when printing pointers."),
2998 N_("Show printing of symbol names when printing pointers."),
2999 NULL
, /* help_doc */
3002 boolean_option_def
{
3004 [] (value_print_options
*opt
) { return &opt
->unionprint
; },
3005 show_unionprint
, /* show_cmd_cb */
3006 N_("Set printing of unions interior to structures."),
3007 N_("Show printing of unions interior to structures."),
3008 NULL
, /* help_doc */
3011 boolean_option_def
{
3013 [] (value_print_options
*opt
) { return &opt
->vtblprint
; },
3014 show_vtblprint
, /* show_cmd_cb */
3015 N_("Set printing of C++ virtual function tables."),
3016 N_("Show printing of C++ virtual function tables."),
3017 NULL
, /* help_doc */
3021 /* See valprint.h. */
3023 gdb::option::option_def_group
3024 make_value_print_options_def_group (value_print_options
*opts
)
3026 return {{value_print_option_defs
}, opts
};
3031 /* Test printing of TYPE_CODE_FLAGS values. */
3034 test_print_flags (gdbarch
*arch
)
3036 type
*flags_type
= arch_flags_type (arch
, "test_type", 32);
3037 type
*field_type
= builtin_type (arch
)->builtin_uint32
;
3040 Fields: CCCB BAAA */
3041 append_flags_type_field (flags_type
, 0, 3, field_type
, "A");
3042 append_flags_type_field (flags_type
, 3, 2, field_type
, "B");
3043 append_flags_type_field (flags_type
, 5, 3, field_type
, "C");
3045 value
*val
= allocate_value (flags_type
);
3046 gdb_byte
*contents
= value_contents_writeable (val
).data ();
3047 store_unsigned_integer (contents
, 4, gdbarch_byte_order (arch
), 0xaa);
3050 val_print_type_code_flags (flags_type
, val
, 0, &out
);
3051 SELF_CHECK (out
.string () == "[ A=2 B=1 C=5 ]");
3056 void _initialize_valprint ();
3058 _initialize_valprint ()
3061 selftests::register_test_foreach_arch ("print-flags", test_print_flags
);
3064 set_show_commands setshow_print_cmds
3065 = add_setshow_prefix_cmd ("print", no_class
,
3066 _("Generic command for setting how things print."),
3067 _("Generic command for showing print settings."),
3068 &setprintlist
, &showprintlist
,
3069 &setlist
, &showlist
);
3070 add_alias_cmd ("p", setshow_print_cmds
.set
, no_class
, 1, &setlist
);
3071 /* Prefer set print to set prompt. */
3072 add_alias_cmd ("pr", setshow_print_cmds
.set
, no_class
, 1, &setlist
);
3073 add_alias_cmd ("p", setshow_print_cmds
.show
, no_class
, 1, &showlist
);
3074 add_alias_cmd ("pr", setshow_print_cmds
.show
, no_class
, 1, &showlist
);
3076 set_show_commands setshow_print_raw_cmds
3077 = add_setshow_prefix_cmd
3079 _("Generic command for setting what things to print in \"raw\" mode."),
3080 _("Generic command for showing \"print raw\" settings."),
3081 &setprintrawlist
, &showprintrawlist
, &setprintlist
, &showprintlist
);
3082 deprecate_cmd (setshow_print_raw_cmds
.set
, nullptr);
3083 deprecate_cmd (setshow_print_raw_cmds
.show
, nullptr);
3085 gdb::option::add_setshow_cmds_for_options
3086 (class_support
, &user_print_options
, value_print_option_defs
,
3087 &setprintlist
, &showprintlist
);
3089 add_setshow_zuinteger_cmd ("input-radix", class_support
, &input_radix_1
,
3091 Set default input radix for entering numbers."), _("\
3092 Show default input radix for entering numbers."), NULL
,
3095 &setlist
, &showlist
);
3097 add_setshow_zuinteger_cmd ("output-radix", class_support
, &output_radix_1
,
3099 Set default output radix for printing of values."), _("\
3100 Show default output radix for printing of values."), NULL
,
3103 &setlist
, &showlist
);
3105 /* The "set radix" and "show radix" commands are special in that
3106 they are like normal set and show commands but allow two normally
3107 independent variables to be either set or shown with a single
3108 command. So the usual deprecated_add_set_cmd() and [deleted]
3109 add_show_from_set() commands aren't really appropriate. */
3110 /* FIXME: i18n: With the new add_setshow_integer command, that is no
3111 longer true - show can display anything. */
3112 add_cmd ("radix", class_support
, set_radix
, _("\
3113 Set default input and output number radices.\n\
3114 Use 'set input-radix' or 'set output-radix' to independently set each.\n\
3115 Without an argument, sets both radices back to the default value of 10."),
3117 add_cmd ("radix", class_support
, show_radix
, _("\
3118 Show the default input and output number radices.\n\
3119 Use 'show input-radix' or 'show output-radix' to independently show each."),