1 /* Print values for GDB, the GNU debugger.
3 Copyright (C) 1986-2020 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 "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 /* Maximum number of wchars returned from wchar_iterate. */
49 /* A convenience macro to compute the size of a wchar_t buffer containing X
51 #define WCHAR_BUFLEN(X) ((X) * sizeof (gdb_wchar_t))
53 /* Character buffer size saved while iterating over wchars. */
54 #define WCHAR_BUFLEN_MAX WCHAR_BUFLEN (MAX_WCHARS)
56 /* A structure to encapsulate state information from iterated
57 character conversions. */
58 struct converted_character
60 /* The number of characters converted. */
63 /* The result of the conversion. See charset.h for more. */
64 enum wchar_iterate_result result
;
66 /* The (saved) converted character(s). */
67 gdb_wchar_t chars
[WCHAR_BUFLEN_MAX
];
69 /* The first converted target byte. */
72 /* The number of bytes converted. */
75 /* How many times this character(s) is repeated. */
79 /* Command lists for set/show print raw. */
80 struct cmd_list_element
*setprintrawlist
;
81 struct cmd_list_element
*showprintrawlist
;
83 /* Prototypes for local functions */
85 static int partial_memory_read (CORE_ADDR memaddr
, gdb_byte
*myaddr
,
86 int len
, int *errptr
);
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 */
109 PRINT_MAX_DEFAULT
, /* print_max */
110 10, /* repeat_count_threshold */
111 0, /* output_format */
113 0, /* stop_print_at_null */
114 0, /* print_array_indexes */
116 1, /* static_field_print */
117 1, /* pascal_static_field_print */
120 1, /* symbol_print */
121 PRINT_MAX_DEPTH_DEFAULT
, /* max_depth */
125 /* Initialize *OPTS to be a copy of the user print options. */
127 get_user_print_options (struct value_print_options
*opts
)
129 *opts
= user_print_options
;
132 /* Initialize *OPTS to be a copy of the user print options, but with
133 pretty-formatting disabled. */
135 get_no_prettyformat_print_options (struct value_print_options
*opts
)
137 *opts
= user_print_options
;
138 opts
->prettyformat
= Val_no_prettyformat
;
141 /* Initialize *OPTS to be a copy of the user print options, but using
142 FORMAT as the formatting option. */
144 get_formatted_print_options (struct value_print_options
*opts
,
147 *opts
= user_print_options
;
148 opts
->format
= format
;
152 show_print_max (struct ui_file
*file
, int from_tty
,
153 struct cmd_list_element
*c
, const char *value
)
155 fprintf_filtered (file
,
156 _("Limit on string chars or array "
157 "elements to print is %s.\n"),
162 /* Default input and output radixes, and output format letter. */
164 unsigned input_radix
= 10;
166 show_input_radix (struct ui_file
*file
, int from_tty
,
167 struct cmd_list_element
*c
, const char *value
)
169 fprintf_filtered (file
,
170 _("Default input radix for entering numbers is %s.\n"),
174 unsigned output_radix
= 10;
176 show_output_radix (struct ui_file
*file
, int from_tty
,
177 struct cmd_list_element
*c
, const char *value
)
179 fprintf_filtered (file
,
180 _("Default output radix for printing of values is %s.\n"),
184 /* By default we print arrays without printing the index of each element in
185 the array. This behavior can be changed by setting PRINT_ARRAY_INDEXES. */
188 show_print_array_indexes (struct ui_file
*file
, int from_tty
,
189 struct cmd_list_element
*c
, const char *value
)
191 fprintf_filtered (file
, _("Printing of array indexes is %s.\n"), value
);
194 /* Print repeat counts if there are more than this many repetitions of an
195 element in an array. Referenced by the low level language dependent
199 show_repeat_count_threshold (struct ui_file
*file
, int from_tty
,
200 struct cmd_list_element
*c
, const char *value
)
202 fprintf_filtered (file
, _("Threshold for repeated print elements is %s.\n"),
206 /* If nonzero, stops printing of char arrays at first null. */
209 show_stop_print_at_null (struct ui_file
*file
, int from_tty
,
210 struct cmd_list_element
*c
, const char *value
)
212 fprintf_filtered (file
,
213 _("Printing of char arrays to stop "
214 "at first null char is %s.\n"),
218 /* Controls pretty printing of structures. */
221 show_prettyformat_structs (struct ui_file
*file
, int from_tty
,
222 struct cmd_list_element
*c
, const char *value
)
224 fprintf_filtered (file
, _("Pretty formatting of structures is %s.\n"), value
);
227 /* Controls pretty printing of arrays. */
230 show_prettyformat_arrays (struct ui_file
*file
, int from_tty
,
231 struct cmd_list_element
*c
, const char *value
)
233 fprintf_filtered (file
, _("Pretty formatting of arrays is %s.\n"), value
);
236 /* If nonzero, causes unions inside structures or other unions to be
240 show_unionprint (struct ui_file
*file
, int from_tty
,
241 struct cmd_list_element
*c
, const char *value
)
243 fprintf_filtered (file
,
244 _("Printing of unions interior to structures is %s.\n"),
248 /* If nonzero, causes machine addresses to be printed in certain contexts. */
251 show_addressprint (struct ui_file
*file
, int from_tty
,
252 struct cmd_list_element
*c
, const char *value
)
254 fprintf_filtered (file
, _("Printing of addresses is %s.\n"), value
);
258 show_symbol_print (struct ui_file
*file
, int from_tty
,
259 struct cmd_list_element
*c
, const char *value
)
261 fprintf_filtered (file
,
262 _("Printing of symbols when printing pointers is %s.\n"),
268 /* A helper function for val_print. When printing in "summary" mode,
269 we want to print scalar arguments, but not aggregate arguments.
270 This function distinguishes between the two. */
273 val_print_scalar_type_p (struct type
*type
)
275 type
= check_typedef (type
);
276 while (TYPE_IS_REFERENCE (type
))
278 type
= TYPE_TARGET_TYPE (type
);
279 type
= check_typedef (type
);
281 switch (type
->code ())
283 case TYPE_CODE_ARRAY
:
284 case TYPE_CODE_STRUCT
:
285 case TYPE_CODE_UNION
:
287 case TYPE_CODE_STRING
:
294 /* A helper function for val_print. When printing with limited depth we
295 want to print string and scalar arguments, but not aggregate arguments.
296 This function distinguishes between the two. */
299 val_print_scalar_or_string_type_p (struct type
*type
,
300 const struct language_defn
*language
)
302 return (val_print_scalar_type_p (type
)
303 || language
->is_string_type_p (type
));
306 /* See valprint.h. */
309 valprint_check_validity (struct ui_file
*stream
,
311 LONGEST embedded_offset
,
312 const struct value
*val
)
314 type
= check_typedef (type
);
316 if (type_not_associated (type
))
318 val_print_not_associated (stream
);
322 if (type_not_allocated (type
))
324 val_print_not_allocated (stream
);
328 if (type
->code () != TYPE_CODE_UNION
329 && type
->code () != TYPE_CODE_STRUCT
330 && type
->code () != TYPE_CODE_ARRAY
)
332 if (value_bits_any_optimized_out (val
,
333 TARGET_CHAR_BIT
* embedded_offset
,
334 TARGET_CHAR_BIT
* TYPE_LENGTH (type
)))
336 val_print_optimized_out (val
, stream
);
340 if (value_bits_synthetic_pointer (val
, TARGET_CHAR_BIT
* embedded_offset
,
341 TARGET_CHAR_BIT
* TYPE_LENGTH (type
)))
343 const int is_ref
= type
->code () == TYPE_CODE_REF
;
344 int ref_is_addressable
= 0;
348 const struct value
*deref_val
= coerce_ref_if_computed (val
);
350 if (deref_val
!= NULL
)
351 ref_is_addressable
= value_lval_const (deref_val
) == lval_memory
;
354 if (!is_ref
|| !ref_is_addressable
)
355 fputs_styled (_("<synthetic pointer>"), metadata_style
.style (),
358 /* C++ references should be valid even if they're synthetic. */
362 if (!value_bytes_available (val
, embedded_offset
, TYPE_LENGTH (type
)))
364 val_print_unavailable (stream
);
373 val_print_optimized_out (const struct value
*val
, struct ui_file
*stream
)
375 if (val
!= NULL
&& value_lval_const (val
) == lval_register
)
376 val_print_not_saved (stream
);
378 fprintf_styled (stream
, metadata_style
.style (), _("<optimized out>"));
382 val_print_not_saved (struct ui_file
*stream
)
384 fprintf_styled (stream
, metadata_style
.style (), _("<not saved>"));
388 val_print_unavailable (struct ui_file
*stream
)
390 fprintf_styled (stream
, metadata_style
.style (), _("<unavailable>"));
394 val_print_invalid_address (struct ui_file
*stream
)
396 fprintf_styled (stream
, metadata_style
.style (), _("<invalid address>"));
399 /* Print a pointer based on the type of its target.
401 Arguments to this functions are roughly the same as those in
402 generic_val_print. A difference is that ADDRESS is the address to print,
403 with embedded_offset already added. ELTTYPE represents
404 the pointed type after check_typedef. */
407 print_unpacked_pointer (struct type
*type
, struct type
*elttype
,
408 CORE_ADDR address
, struct ui_file
*stream
,
409 const struct value_print_options
*options
)
411 struct gdbarch
*gdbarch
= get_type_arch (type
);
413 if (elttype
->code () == TYPE_CODE_FUNC
)
415 /* Try to print what function it points to. */
416 print_function_pointer_address (options
, gdbarch
, address
, stream
);
420 if (options
->symbol_print
)
421 print_address_demangle (options
, gdbarch
, address
, stream
, demangle
);
422 else if (options
->addressprint
)
423 fputs_filtered (paddress (gdbarch
, address
), stream
);
426 /* generic_val_print helper for TYPE_CODE_ARRAY. */
429 generic_val_print_array (struct value
*val
,
430 struct ui_file
*stream
, int recurse
,
431 const struct value_print_options
*options
,
433 generic_val_print_decorations
*decorations
)
435 struct type
*type
= check_typedef (value_type (val
));
436 struct type
*unresolved_elttype
= TYPE_TARGET_TYPE (type
);
437 struct type
*elttype
= check_typedef (unresolved_elttype
);
439 if (TYPE_LENGTH (type
) > 0 && TYPE_LENGTH (unresolved_elttype
) > 0)
441 LONGEST low_bound
, high_bound
;
443 if (!get_array_bounds (type
, &low_bound
, &high_bound
))
444 error (_("Could not determine the array high bound"));
446 fputs_filtered (decorations
->array_start
, stream
);
447 value_print_array_elements (val
, stream
, recurse
, options
, 0);
448 fputs_filtered (decorations
->array_end
, stream
);
452 /* Array of unspecified length: treat like pointer to first elt. */
453 print_unpacked_pointer (type
, elttype
, value_address (val
),
459 /* generic_value_print helper for TYPE_CODE_PTR. */
462 generic_value_print_ptr (struct value
*val
, struct ui_file
*stream
,
463 const struct value_print_options
*options
)
466 if (options
->format
&& options
->format
!= 's')
467 value_print_scalar_formatted (val
, options
, 0, stream
);
470 struct type
*type
= check_typedef (value_type (val
));
471 struct type
*elttype
= check_typedef (TYPE_TARGET_TYPE (type
));
472 const gdb_byte
*valaddr
= value_contents_for_printing (val
);
473 CORE_ADDR addr
= unpack_pointer (type
, valaddr
);
475 print_unpacked_pointer (type
, elttype
, addr
, stream
, options
);
480 /* Print '@' followed by the address contained in ADDRESS_BUFFER. */
483 print_ref_address (struct type
*type
, const gdb_byte
*address_buffer
,
484 int embedded_offset
, struct ui_file
*stream
)
486 struct gdbarch
*gdbarch
= get_type_arch (type
);
488 if (address_buffer
!= NULL
)
491 = extract_typed_address (address_buffer
+ embedded_offset
, type
);
493 fprintf_filtered (stream
, "@");
494 fputs_filtered (paddress (gdbarch
, address
), stream
);
496 /* Else: we have a non-addressable value, such as a DW_AT_const_value. */
499 /* If VAL is addressable, return the value contents buffer of a value that
500 represents a pointer to VAL. Otherwise return NULL. */
502 static const gdb_byte
*
503 get_value_addr_contents (struct value
*deref_val
)
505 gdb_assert (deref_val
!= NULL
);
507 if (value_lval_const (deref_val
) == lval_memory
)
508 return value_contents_for_printing_const (value_addr (deref_val
));
511 /* We have a non-addressable value, such as a DW_AT_const_value. */
516 /* generic_val_print helper for TYPE_CODE_{RVALUE_,}REF. */
519 generic_val_print_ref (struct type
*type
,
520 int embedded_offset
, struct ui_file
*stream
, int recurse
,
521 struct value
*original_value
,
522 const struct value_print_options
*options
)
524 struct type
*elttype
= check_typedef (TYPE_TARGET_TYPE (type
));
525 struct value
*deref_val
= NULL
;
526 const int value_is_synthetic
527 = value_bits_synthetic_pointer (original_value
,
528 TARGET_CHAR_BIT
* embedded_offset
,
529 TARGET_CHAR_BIT
* TYPE_LENGTH (type
));
530 const int must_coerce_ref
= ((options
->addressprint
&& value_is_synthetic
)
531 || options
->deref_ref
);
532 const int type_is_defined
= elttype
->code () != TYPE_CODE_UNDEF
;
533 const gdb_byte
*valaddr
= value_contents_for_printing (original_value
);
535 if (must_coerce_ref
&& type_is_defined
)
537 deref_val
= coerce_ref_if_computed (original_value
);
539 if (deref_val
!= NULL
)
541 /* More complicated computed references are not supported. */
542 gdb_assert (embedded_offset
== 0);
545 deref_val
= value_at (TYPE_TARGET_TYPE (type
),
546 unpack_pointer (type
, valaddr
+ embedded_offset
));
548 /* Else, original_value isn't a synthetic reference or we don't have to print
549 the reference's contents.
551 Notice that for references to TYPE_CODE_STRUCT, 'set print object on' will
552 cause original_value to be a not_lval instead of an lval_computed,
553 which will make value_bits_synthetic_pointer return false.
554 This happens because if options->objectprint is true, c_value_print will
555 overwrite original_value's contents with the result of coercing
556 the reference through value_addr, and then set its type back to
557 TYPE_CODE_REF. In that case we don't have to coerce the reference again;
558 we can simply treat it as non-synthetic and move on. */
560 if (options
->addressprint
)
562 const gdb_byte
*address
= (value_is_synthetic
&& type_is_defined
563 ? get_value_addr_contents (deref_val
)
566 print_ref_address (type
, address
, embedded_offset
, stream
);
568 if (options
->deref_ref
)
569 fputs_filtered (": ", stream
);
572 if (options
->deref_ref
)
575 common_val_print (deref_val
, stream
, recurse
, options
,
578 fputs_filtered ("???", stream
);
582 /* Helper function for generic_val_print_enum.
583 This is also used to print enums in TYPE_CODE_FLAGS values. */
586 generic_val_print_enum_1 (struct type
*type
, LONGEST val
,
587 struct ui_file
*stream
)
592 len
= type
->num_fields ();
593 for (i
= 0; i
< len
; i
++)
596 if (val
== TYPE_FIELD_ENUMVAL (type
, i
))
603 fputs_styled (TYPE_FIELD_NAME (type
, i
), variable_name_style
.style (),
606 else if (TYPE_FLAG_ENUM (type
))
610 /* We have a "flag" enum, so we try to decompose it into pieces as
611 appropriate. The enum may have multiple enumerators representing
612 the same bit, in which case we choose to only print the first one
614 for (i
= 0; i
< len
; ++i
)
618 ULONGEST enumval
= TYPE_FIELD_ENUMVAL (type
, i
);
619 int nbits
= count_one_bits_ll (enumval
);
621 gdb_assert (nbits
== 0 || nbits
== 1);
623 if ((val
& enumval
) != 0)
627 fputs_filtered ("(", stream
);
631 fputs_filtered (" | ", stream
);
633 val
&= ~TYPE_FIELD_ENUMVAL (type
, i
);
634 fputs_styled (TYPE_FIELD_NAME (type
, i
),
635 variable_name_style
.style (), stream
);
641 /* There are leftover bits, print them. */
643 fputs_filtered ("(", stream
);
645 fputs_filtered (" | ", stream
);
647 fputs_filtered ("unknown: 0x", stream
);
648 print_longest (stream
, 'x', 0, val
);
649 fputs_filtered (")", stream
);
653 /* Nothing has been printed and the value is 0, the enum value must
655 fputs_filtered ("0", stream
);
659 /* Something has been printed, close the parenthesis. */
660 fputs_filtered (")", stream
);
664 print_longest (stream
, 'd', 0, val
);
667 /* generic_val_print helper for TYPE_CODE_ENUM. */
670 generic_val_print_enum (struct type
*type
,
671 int embedded_offset
, struct ui_file
*stream
,
672 struct value
*original_value
,
673 const struct value_print_options
*options
)
676 struct gdbarch
*gdbarch
= get_type_arch (type
);
677 int unit_size
= gdbarch_addressable_memory_unit_size (gdbarch
);
679 gdb_assert (!options
->format
);
681 const gdb_byte
*valaddr
= value_contents_for_printing (original_value
);
683 val
= unpack_long (type
, valaddr
+ embedded_offset
* unit_size
);
685 generic_val_print_enum_1 (type
, val
, stream
);
688 /* generic_val_print helper for TYPE_CODE_FUNC and TYPE_CODE_METHOD. */
691 generic_val_print_func (struct type
*type
,
692 int embedded_offset
, CORE_ADDR address
,
693 struct ui_file
*stream
,
694 struct value
*original_value
,
695 const struct value_print_options
*options
)
697 struct gdbarch
*gdbarch
= get_type_arch (type
);
699 gdb_assert (!options
->format
);
701 /* FIXME, we should consider, at least for ANSI C language,
702 eliminating the distinction made between FUNCs and POINTERs to
704 fprintf_filtered (stream
, "{");
705 type_print (type
, "", stream
, -1);
706 fprintf_filtered (stream
, "} ");
707 /* Try to print what function it points to, and its address. */
708 print_address_demangle (options
, gdbarch
, address
, stream
, demangle
);
711 /* generic_value_print helper for TYPE_CODE_BOOL. */
714 generic_value_print_bool
715 (struct value
*value
, struct ui_file
*stream
,
716 const struct value_print_options
*options
,
717 const struct generic_val_print_decorations
*decorations
)
719 if (options
->format
|| options
->output_format
)
721 struct value_print_options opts
= *options
;
722 opts
.format
= (options
->format
? options
->format
723 : options
->output_format
);
724 value_print_scalar_formatted (value
, &opts
, 0, stream
);
728 const gdb_byte
*valaddr
= value_contents_for_printing (value
);
729 struct type
*type
= check_typedef (value_type (value
));
730 LONGEST val
= unpack_long (type
, valaddr
);
732 fputs_filtered (decorations
->false_name
, stream
);
734 fputs_filtered (decorations
->true_name
, stream
);
736 print_longest (stream
, 'd', 0, val
);
740 /* generic_value_print helper for TYPE_CODE_INT. */
743 generic_value_print_int (struct value
*val
, struct ui_file
*stream
,
744 const struct value_print_options
*options
)
746 struct value_print_options opts
= *options
;
748 opts
.format
= (options
->format
? options
->format
749 : options
->output_format
);
750 value_print_scalar_formatted (val
, &opts
, 0, stream
);
753 /* generic_value_print helper for TYPE_CODE_CHAR. */
756 generic_value_print_char (struct value
*value
, struct ui_file
*stream
,
757 const struct value_print_options
*options
)
759 if (options
->format
|| options
->output_format
)
761 struct value_print_options opts
= *options
;
763 opts
.format
= (options
->format
? options
->format
764 : options
->output_format
);
765 value_print_scalar_formatted (value
, &opts
, 0, stream
);
769 struct type
*unresolved_type
= value_type (value
);
770 struct type
*type
= check_typedef (unresolved_type
);
771 const gdb_byte
*valaddr
= value_contents_for_printing (value
);
773 LONGEST val
= unpack_long (type
, valaddr
);
774 if (type
->is_unsigned ())
775 fprintf_filtered (stream
, "%u", (unsigned int) val
);
777 fprintf_filtered (stream
, "%d", (int) val
);
778 fputs_filtered (" ", stream
);
779 LA_PRINT_CHAR (val
, unresolved_type
, stream
);
783 /* generic_val_print helper for TYPE_CODE_FLT and TYPE_CODE_DECFLOAT. */
786 generic_val_print_float (struct type
*type
, struct ui_file
*stream
,
787 struct value
*original_value
,
788 const struct value_print_options
*options
)
790 gdb_assert (!options
->format
);
792 const gdb_byte
*valaddr
= value_contents_for_printing (original_value
);
794 print_floating (valaddr
, type
, stream
);
797 /* generic_value_print helper for TYPE_CODE_COMPLEX. */
800 generic_value_print_complex (struct value
*val
, struct ui_file
*stream
,
801 const struct value_print_options
*options
,
802 const struct generic_val_print_decorations
805 fprintf_filtered (stream
, "%s", decorations
->complex_prefix
);
807 struct value
*real_part
= value_real_part (val
);
808 value_print_scalar_formatted (real_part
, options
, 0, stream
);
809 fprintf_filtered (stream
, "%s", decorations
->complex_infix
);
811 struct value
*imag_part
= value_imaginary_part (val
);
812 value_print_scalar_formatted (imag_part
, options
, 0, stream
);
813 fprintf_filtered (stream
, "%s", decorations
->complex_suffix
);
816 /* generic_value_print helper for TYPE_CODE_MEMBERPTR. */
819 generic_value_print_memberptr
820 (struct value
*val
, struct ui_file
*stream
,
822 const struct value_print_options
*options
,
823 const struct generic_val_print_decorations
*decorations
)
825 if (!options
->format
)
827 /* Member pointers are essentially specific to C++, and so if we
828 encounter one, we should print it according to C++ rules. */
829 struct type
*type
= check_typedef (value_type (val
));
830 const gdb_byte
*valaddr
= value_contents_for_printing (val
);
831 cp_print_class_member (valaddr
, type
, stream
, "&");
834 generic_value_print (val
, stream
, recurse
, options
, decorations
);
837 /* See valprint.h. */
840 generic_value_print (struct value
*val
, struct ui_file
*stream
, int recurse
,
841 const struct value_print_options
*options
,
842 const struct generic_val_print_decorations
*decorations
)
844 struct type
*type
= value_type (val
);
846 type
= check_typedef (type
);
847 switch (type
->code ())
849 case TYPE_CODE_ARRAY
:
850 generic_val_print_array (val
, stream
, recurse
, options
, decorations
);
853 case TYPE_CODE_MEMBERPTR
:
854 generic_value_print_memberptr (val
, stream
, recurse
, options
,
859 generic_value_print_ptr (val
, stream
, options
);
863 case TYPE_CODE_RVALUE_REF
:
864 generic_val_print_ref (type
, 0, stream
, recurse
,
870 value_print_scalar_formatted (val
, options
, 0, stream
);
872 generic_val_print_enum (type
, 0, stream
, val
, options
);
875 case TYPE_CODE_FLAGS
:
877 value_print_scalar_formatted (val
, options
, 0, stream
);
879 val_print_type_code_flags (type
, val
, 0, stream
);
883 case TYPE_CODE_METHOD
:
885 value_print_scalar_formatted (val
, options
, 0, stream
);
887 generic_val_print_func (type
, 0, value_address (val
), stream
,
892 generic_value_print_bool (val
, stream
, options
, decorations
);
895 case TYPE_CODE_RANGE
:
896 /* FIXME: create_static_range_type does not set the unsigned bit in a
897 range type (I think it probably should copy it from the
898 target type), so we won't print values which are too large to
899 fit in a signed integer correctly. */
900 /* FIXME: Doesn't handle ranges of enums correctly. (Can't just
901 print with the target type, though, because the size of our
902 type and the target type might differ). */
907 generic_value_print_int (val
, stream
, options
);
911 generic_value_print_char (val
, stream
, options
);
915 case TYPE_CODE_DECFLOAT
:
917 value_print_scalar_formatted (val
, options
, 0, stream
);
919 generic_val_print_float (type
, stream
, val
, options
);
923 fputs_filtered (decorations
->void_name
, stream
);
926 case TYPE_CODE_ERROR
:
927 fprintf_filtered (stream
, "%s", TYPE_ERROR_NAME (type
));
930 case TYPE_CODE_UNDEF
:
931 /* This happens (without TYPE_STUB set) on systems which don't use
932 dbx xrefs (NO_DBX_XREFS in gcc) if a file has a "struct foo *bar"
933 and no complete type for struct foo in that file. */
934 fprintf_styled (stream
, metadata_style
.style (), _("<incomplete type>"));
937 case TYPE_CODE_COMPLEX
:
938 generic_value_print_complex (val
, stream
, options
, decorations
);
941 case TYPE_CODE_METHODPTR
:
942 cplus_print_method_ptr (value_contents_for_printing (val
), type
,
946 case TYPE_CODE_UNION
:
947 case TYPE_CODE_STRUCT
:
949 error (_("Unhandled type code %d in symbol table."),
954 /* Helper function for val_print and common_val_print that does the
955 work. Arguments are as to val_print, but FULL_VALUE, if given, is
956 the value to be printed. */
959 do_val_print (struct value
*value
, struct ui_file
*stream
, int recurse
,
960 const struct value_print_options
*options
,
961 const struct language_defn
*language
)
964 struct value_print_options local_opts
= *options
;
965 struct type
*type
= value_type (value
);
966 struct type
*real_type
= check_typedef (type
);
968 if (local_opts
.prettyformat
== Val_prettyformat_default
)
969 local_opts
.prettyformat
= (local_opts
.prettyformat_structs
970 ? Val_prettyformat
: Val_no_prettyformat
);
974 /* Ensure that the type is complete and not just a stub. If the type is
975 only a stub and we can't find and substitute its complete type, then
976 print appropriate string and return. */
978 if (real_type
->is_stub ())
980 fprintf_styled (stream
, metadata_style
.style (), _("<incomplete type>"));
984 if (!valprint_check_validity (stream
, real_type
, 0, value
))
989 ret
= apply_ext_lang_val_pretty_printer (value
, stream
, recurse
, options
,
995 /* Handle summary mode. If the value is a scalar, print it;
996 otherwise, print an ellipsis. */
997 if (options
->summary
&& !val_print_scalar_type_p (type
))
999 fprintf_filtered (stream
, "...");
1003 /* If this value is too deep then don't print it. */
1004 if (!val_print_scalar_or_string_type_p (type
, language
)
1005 && val_print_check_max_depth (stream
, recurse
, options
, language
))
1010 language
->value_print_inner (value
, stream
, recurse
, &local_opts
);
1012 catch (const gdb_exception_error
&except
)
1014 fprintf_styled (stream
, metadata_style
.style (),
1015 _("<error reading variable>"));
1019 /* See valprint.h. */
1022 val_print_check_max_depth (struct ui_file
*stream
, int recurse
,
1023 const struct value_print_options
*options
,
1024 const struct language_defn
*language
)
1026 if (options
->max_depth
> -1 && recurse
>= options
->max_depth
)
1028 gdb_assert (language
->struct_too_deep_ellipsis () != NULL
);
1029 fputs_filtered (language
->struct_too_deep_ellipsis (), stream
);
1036 /* Check whether the value VAL is printable. Return 1 if it is;
1037 return 0 and print an appropriate error message to STREAM according to
1038 OPTIONS if it is not. */
1041 value_check_printable (struct value
*val
, struct ui_file
*stream
,
1042 const struct value_print_options
*options
)
1046 fprintf_styled (stream
, metadata_style
.style (),
1047 _("<address of value unknown>"));
1051 if (value_entirely_optimized_out (val
))
1053 if (options
->summary
&& !val_print_scalar_type_p (value_type (val
)))
1054 fprintf_filtered (stream
, "...");
1056 val_print_optimized_out (val
, stream
);
1060 if (value_entirely_unavailable (val
))
1062 if (options
->summary
&& !val_print_scalar_type_p (value_type (val
)))
1063 fprintf_filtered (stream
, "...");
1065 val_print_unavailable (stream
);
1069 if (value_type (val
)->code () == TYPE_CODE_INTERNAL_FUNCTION
)
1071 fprintf_styled (stream
, metadata_style
.style (),
1072 _("<internal function %s>"),
1073 value_internal_function_name (val
));
1077 if (type_not_associated (value_type (val
)))
1079 val_print_not_associated (stream
);
1083 if (type_not_allocated (value_type (val
)))
1085 val_print_not_allocated (stream
);
1092 /* Print using the given LANGUAGE the value VAL onto stream STREAM according
1095 This is a preferable interface to val_print, above, because it uses
1096 GDB's value mechanism. */
1099 common_val_print (struct value
*val
, struct ui_file
*stream
, int recurse
,
1100 const struct value_print_options
*options
,
1101 const struct language_defn
*language
)
1103 if (language
->la_language
== language_ada
)
1104 /* The value might have a dynamic type, which would cause trouble
1105 below when trying to extract the value contents (since the value
1106 size is determined from the type size which is unknown). So
1107 get a fixed representation of our value. */
1108 val
= ada_to_fixed_value (val
);
1110 if (value_lazy (val
))
1111 value_fetch_lazy (val
);
1113 do_val_print (val
, stream
, recurse
, options
, language
);
1116 /* See valprint.h. */
1119 common_val_print_checked (struct value
*val
, struct ui_file
*stream
,
1121 const struct value_print_options
*options
,
1122 const struct language_defn
*language
)
1124 if (!value_check_printable (val
, stream
, options
))
1126 common_val_print (val
, stream
, recurse
, options
, language
);
1129 /* Print on stream STREAM the value VAL according to OPTIONS. The value
1130 is printed using the current_language syntax. */
1133 value_print (struct value
*val
, struct ui_file
*stream
,
1134 const struct value_print_options
*options
)
1136 scoped_value_mark free_values
;
1138 if (!value_check_printable (val
, stream
, options
))
1144 = apply_ext_lang_val_pretty_printer (val
, stream
, 0, options
,
1151 LA_VALUE_PRINT (val
, stream
, options
);
1155 val_print_type_code_flags (struct type
*type
, struct value
*original_value
,
1156 int embedded_offset
, struct ui_file
*stream
)
1158 const gdb_byte
*valaddr
= (value_contents_for_printing (original_value
)
1160 ULONGEST val
= unpack_long (type
, valaddr
);
1161 int field
, nfields
= type
->num_fields ();
1162 struct gdbarch
*gdbarch
= get_type_arch (type
);
1163 struct type
*bool_type
= builtin_type (gdbarch
)->builtin_bool
;
1165 fputs_filtered ("[", stream
);
1166 for (field
= 0; field
< nfields
; field
++)
1168 if (TYPE_FIELD_NAME (type
, field
)[0] != '\0')
1170 struct type
*field_type
= type
->field (field
).type ();
1172 if (field_type
== bool_type
1173 /* We require boolean types here to be one bit wide. This is a
1174 problematic place to notify the user of an internal error
1175 though. Instead just fall through and print the field as an
1177 && TYPE_FIELD_BITSIZE (type
, field
) == 1)
1179 if (val
& ((ULONGEST
)1 << TYPE_FIELD_BITPOS (type
, field
)))
1182 styled_string (variable_name_style
.style (),
1183 TYPE_FIELD_NAME (type
, field
)));
1187 unsigned field_len
= TYPE_FIELD_BITSIZE (type
, field
);
1189 = val
>> (TYPE_FIELD_BITPOS (type
, field
) - field_len
+ 1);
1191 if (field_len
< sizeof (ULONGEST
) * TARGET_CHAR_BIT
)
1192 field_val
&= ((ULONGEST
) 1 << field_len
) - 1;
1193 fprintf_filtered (stream
, " %ps=",
1194 styled_string (variable_name_style
.style (),
1195 TYPE_FIELD_NAME (type
, field
)));
1196 if (field_type
->code () == TYPE_CODE_ENUM
)
1197 generic_val_print_enum_1 (field_type
, field_val
, stream
);
1199 print_longest (stream
, 'd', 0, field_val
);
1203 fputs_filtered (" ]", stream
);
1206 /* See valprint.h. */
1209 value_print_scalar_formatted (struct value
*val
,
1210 const struct value_print_options
*options
,
1212 struct ui_file
*stream
)
1214 struct type
*type
= check_typedef (value_type (val
));
1216 gdb_assert (val
!= NULL
);
1218 /* If we get here with a string format, try again without it. Go
1219 all the way back to the language printers, which may call us
1221 if (options
->format
== 's')
1223 struct value_print_options opts
= *options
;
1226 common_val_print (val
, stream
, 0, &opts
, current_language
);
1230 /* value_contents_for_printing fetches all VAL's contents. They are
1231 needed to check whether VAL is optimized-out or unavailable
1233 const gdb_byte
*valaddr
= value_contents_for_printing (val
);
1235 /* A scalar object that does not have all bits available can't be
1236 printed, because all bits contribute to its representation. */
1237 if (value_bits_any_optimized_out (val
, 0,
1238 TARGET_CHAR_BIT
* TYPE_LENGTH (type
)))
1239 val_print_optimized_out (val
, stream
);
1240 else if (!value_bytes_available (val
, 0, TYPE_LENGTH (type
)))
1241 val_print_unavailable (stream
);
1243 print_scalar_formatted (valaddr
, type
, options
, size
, stream
);
1246 /* Print a number according to FORMAT which is one of d,u,x,o,b,h,w,g.
1247 The raison d'etre of this function is to consolidate printing of
1248 LONG_LONG's into this one function. The format chars b,h,w,g are
1249 from print_scalar_formatted(). Numbers are printed using C
1252 USE_C_FORMAT means to use C format in all cases. Without it,
1253 'o' and 'x' format do not include the standard C radix prefix
1256 Hilfinger/2004-09-09: USE_C_FORMAT was originally called USE_LOCAL
1257 and was intended to request formatting according to the current
1258 language and would be used for most integers that GDB prints. The
1259 exceptional cases were things like protocols where the format of
1260 the integer is a protocol thing, not a user-visible thing). The
1261 parameter remains to preserve the information of what things might
1262 be printed with language-specific format, should we ever resurrect
1266 print_longest (struct ui_file
*stream
, int format
, int use_c_format
,
1274 val
= int_string (val_long
, 10, 1, 0, 1); break;
1276 val
= int_string (val_long
, 10, 0, 0, 1); break;
1278 val
= int_string (val_long
, 16, 0, 0, use_c_format
); break;
1280 val
= int_string (val_long
, 16, 0, 2, 1); break;
1282 val
= int_string (val_long
, 16, 0, 4, 1); break;
1284 val
= int_string (val_long
, 16, 0, 8, 1); break;
1286 val
= int_string (val_long
, 16, 0, 16, 1); break;
1289 val
= int_string (val_long
, 8, 0, 0, use_c_format
); break;
1291 internal_error (__FILE__
, __LINE__
,
1292 _("failed internal consistency check"));
1294 fputs_filtered (val
, stream
);
1297 /* This used to be a macro, but I don't think it is called often enough
1298 to merit such treatment. */
1299 /* Convert a LONGEST to an int. This is used in contexts (e.g. number of
1300 arguments to a function, number in a value history, register number, etc.)
1301 where the value must not be larger than can fit in an int. */
1304 longest_to_int (LONGEST arg
)
1306 /* Let the compiler do the work. */
1307 int rtnval
= (int) arg
;
1309 /* Check for overflows or underflows. */
1310 if (sizeof (LONGEST
) > sizeof (int))
1314 error (_("Value out of range."));
1320 /* Print a floating point value of floating-point type TYPE,
1321 pointed to in GDB by VALADDR, on STREAM. */
1324 print_floating (const gdb_byte
*valaddr
, struct type
*type
,
1325 struct ui_file
*stream
)
1327 std::string str
= target_float_to_string (valaddr
, type
);
1328 fputs_filtered (str
.c_str (), stream
);
1332 print_binary_chars (struct ui_file
*stream
, const gdb_byte
*valaddr
,
1333 unsigned len
, enum bfd_endian byte_order
, bool zero_pad
)
1338 bool seen_a_one
= false;
1340 /* Declared "int" so it will be signed.
1341 This ensures that right shift will shift in zeros. */
1343 const int mask
= 0x080;
1345 if (byte_order
== BFD_ENDIAN_BIG
)
1351 /* Every byte has 8 binary characters; peel off
1352 and print from the MSB end. */
1354 for (i
= 0; i
< (HOST_CHAR_BIT
* sizeof (*p
)); i
++)
1356 if (*p
& (mask
>> i
))
1361 if (zero_pad
|| seen_a_one
|| b
== '1')
1362 fputc_filtered (b
, stream
);
1370 for (p
= valaddr
+ len
- 1;
1374 for (i
= 0; i
< (HOST_CHAR_BIT
* sizeof (*p
)); i
++)
1376 if (*p
& (mask
>> i
))
1381 if (zero_pad
|| seen_a_one
|| b
== '1')
1382 fputc_filtered (b
, stream
);
1389 /* When not zero-padding, ensure that something is printed when the
1391 if (!zero_pad
&& !seen_a_one
)
1392 fputc_filtered ('0', stream
);
1395 /* A helper for print_octal_chars that emits a single octal digit,
1396 optionally suppressing it if is zero and updating SEEN_A_ONE. */
1399 emit_octal_digit (struct ui_file
*stream
, bool *seen_a_one
, int digit
)
1401 if (*seen_a_one
|| digit
!= 0)
1402 fprintf_filtered (stream
, "%o", digit
);
1407 /* VALADDR points to an integer of LEN bytes.
1408 Print it in octal on stream or format it in buf. */
1411 print_octal_chars (struct ui_file
*stream
, const gdb_byte
*valaddr
,
1412 unsigned len
, enum bfd_endian byte_order
)
1415 unsigned char octa1
, octa2
, octa3
, carry
;
1418 /* Octal is 3 bits, which doesn't fit. Yuk. So we have to track
1419 * the extra bits, which cycle every three bytes:
1421 * Byte side: 0 1 2 3
1423 * bit number 123 456 78 | 9 012 345 6 | 78 901 234 | 567 890 12 |
1425 * Octal side: 0 1 carry 3 4 carry ...
1427 * Cycle number: 0 1 2
1429 * But of course we are printing from the high side, so we have to
1430 * figure out where in the cycle we are so that we end up with no
1431 * left over bits at the end.
1433 #define BITS_IN_OCTAL 3
1434 #define HIGH_ZERO 0340
1435 #define LOW_ZERO 0034
1436 #define CARRY_ZERO 0003
1437 static_assert (HIGH_ZERO
+ LOW_ZERO
+ CARRY_ZERO
== 0xff,
1438 "cycle zero constants are wrong");
1439 #define HIGH_ONE 0200
1440 #define MID_ONE 0160
1441 #define LOW_ONE 0016
1442 #define CARRY_ONE 0001
1443 static_assert (HIGH_ONE
+ MID_ONE
+ LOW_ONE
+ CARRY_ONE
== 0xff,
1444 "cycle one constants are wrong");
1445 #define HIGH_TWO 0300
1446 #define MID_TWO 0070
1447 #define LOW_TWO 0007
1448 static_assert (HIGH_TWO
+ MID_TWO
+ LOW_TWO
== 0xff,
1449 "cycle two constants are wrong");
1451 /* For 32 we start in cycle 2, with two bits and one bit carry;
1452 for 64 in cycle in cycle 1, with one bit and a two bit carry. */
1454 cycle
= (len
* HOST_CHAR_BIT
) % BITS_IN_OCTAL
;
1457 fputs_filtered ("0", stream
);
1458 bool seen_a_one
= false;
1459 if (byte_order
== BFD_ENDIAN_BIG
)
1468 /* No carry in, carry out two bits. */
1470 octa1
= (HIGH_ZERO
& *p
) >> 5;
1471 octa2
= (LOW_ZERO
& *p
) >> 2;
1472 carry
= (CARRY_ZERO
& *p
);
1473 emit_octal_digit (stream
, &seen_a_one
, octa1
);
1474 emit_octal_digit (stream
, &seen_a_one
, octa2
);
1478 /* Carry in two bits, carry out one bit. */
1480 octa1
= (carry
<< 1) | ((HIGH_ONE
& *p
) >> 7);
1481 octa2
= (MID_ONE
& *p
) >> 4;
1482 octa3
= (LOW_ONE
& *p
) >> 1;
1483 carry
= (CARRY_ONE
& *p
);
1484 emit_octal_digit (stream
, &seen_a_one
, octa1
);
1485 emit_octal_digit (stream
, &seen_a_one
, octa2
);
1486 emit_octal_digit (stream
, &seen_a_one
, octa3
);
1490 /* Carry in one bit, no carry out. */
1492 octa1
= (carry
<< 2) | ((HIGH_TWO
& *p
) >> 6);
1493 octa2
= (MID_TWO
& *p
) >> 3;
1494 octa3
= (LOW_TWO
& *p
);
1496 emit_octal_digit (stream
, &seen_a_one
, octa1
);
1497 emit_octal_digit (stream
, &seen_a_one
, octa2
);
1498 emit_octal_digit (stream
, &seen_a_one
, octa3
);
1502 error (_("Internal error in octal conversion;"));
1506 cycle
= cycle
% BITS_IN_OCTAL
;
1511 for (p
= valaddr
+ len
- 1;
1518 /* Carry out, no carry in */
1520 octa1
= (HIGH_ZERO
& *p
) >> 5;
1521 octa2
= (LOW_ZERO
& *p
) >> 2;
1522 carry
= (CARRY_ZERO
& *p
);
1523 emit_octal_digit (stream
, &seen_a_one
, octa1
);
1524 emit_octal_digit (stream
, &seen_a_one
, octa2
);
1528 /* Carry in, carry out */
1530 octa1
= (carry
<< 1) | ((HIGH_ONE
& *p
) >> 7);
1531 octa2
= (MID_ONE
& *p
) >> 4;
1532 octa3
= (LOW_ONE
& *p
) >> 1;
1533 carry
= (CARRY_ONE
& *p
);
1534 emit_octal_digit (stream
, &seen_a_one
, octa1
);
1535 emit_octal_digit (stream
, &seen_a_one
, octa2
);
1536 emit_octal_digit (stream
, &seen_a_one
, octa3
);
1540 /* Carry in, no carry out */
1542 octa1
= (carry
<< 2) | ((HIGH_TWO
& *p
) >> 6);
1543 octa2
= (MID_TWO
& *p
) >> 3;
1544 octa3
= (LOW_TWO
& *p
);
1546 emit_octal_digit (stream
, &seen_a_one
, octa1
);
1547 emit_octal_digit (stream
, &seen_a_one
, octa2
);
1548 emit_octal_digit (stream
, &seen_a_one
, octa3
);
1552 error (_("Internal error in octal conversion;"));
1556 cycle
= cycle
% BITS_IN_OCTAL
;
1562 /* Possibly negate the integer represented by BYTES. It contains LEN
1563 bytes in the specified byte order. If the integer is negative,
1564 copy it into OUT_VEC, negate it, and return true. Otherwise, do
1565 nothing and return false. */
1568 maybe_negate_by_bytes (const gdb_byte
*bytes
, unsigned len
,
1569 enum bfd_endian byte_order
,
1570 gdb::byte_vector
*out_vec
)
1573 gdb_assert (len
> 0);
1574 if (byte_order
== BFD_ENDIAN_BIG
)
1575 sign_byte
= bytes
[0];
1577 sign_byte
= bytes
[len
- 1];
1578 if ((sign_byte
& 0x80) == 0)
1581 out_vec
->resize (len
);
1583 /* Compute -x == 1 + ~x. */
1584 if (byte_order
== BFD_ENDIAN_LITTLE
)
1587 for (unsigned i
= 0; i
< len
; ++i
)
1589 unsigned tem
= (0xff & ~bytes
[i
]) + carry
;
1590 (*out_vec
)[i
] = tem
& 0xff;
1597 for (unsigned i
= len
; i
> 0; --i
)
1599 unsigned tem
= (0xff & ~bytes
[i
- 1]) + carry
;
1600 (*out_vec
)[i
- 1] = tem
& 0xff;
1608 /* VALADDR points to an integer of LEN bytes.
1609 Print it in decimal on stream or format it in buf. */
1612 print_decimal_chars (struct ui_file
*stream
, const gdb_byte
*valaddr
,
1613 unsigned len
, bool is_signed
,
1614 enum bfd_endian byte_order
)
1617 #define CARRY_OUT( x ) ((x) / TEN) /* extend char to int */
1618 #define CARRY_LEFT( x ) ((x) % TEN)
1619 #define SHIFT( x ) ((x) << 4)
1620 #define LOW_NIBBLE( x ) ( (x) & 0x00F)
1621 #define HIGH_NIBBLE( x ) (((x) & 0x0F0) >> 4)
1626 int i
, j
, decimal_digits
;
1630 gdb::byte_vector negated_bytes
;
1632 && maybe_negate_by_bytes (valaddr
, len
, byte_order
, &negated_bytes
))
1634 fputs_filtered ("-", stream
);
1635 valaddr
= negated_bytes
.data ();
1638 /* Base-ten number is less than twice as many digits
1639 as the base 16 number, which is 2 digits per byte. */
1641 decimal_len
= len
* 2 * 2;
1642 std::vector
<unsigned char> digits (decimal_len
, 0);
1644 /* Ok, we have an unknown number of bytes of data to be printed in
1647 * Given a hex number (in nibbles) as XYZ, we start by taking X and
1648 * decimalizing it as "x1 x2" in two decimal nibbles. Then we multiply
1649 * the nibbles by 16, add Y and re-decimalize. Repeat with Z.
1651 * The trick is that "digits" holds a base-10 number, but sometimes
1652 * the individual digits are > 10.
1654 * Outer loop is per nibble (hex digit) of input, from MSD end to
1657 decimal_digits
= 0; /* Number of decimal digits so far */
1658 p
= (byte_order
== BFD_ENDIAN_BIG
) ? valaddr
: valaddr
+ len
- 1;
1660 while ((byte_order
== BFD_ENDIAN_BIG
) ? (p
< valaddr
+ len
) : (p
>= valaddr
))
1663 * Multiply current base-ten number by 16 in place.
1664 * Each digit was between 0 and 9, now is between
1667 for (j
= 0; j
< decimal_digits
; j
++)
1669 digits
[j
] = SHIFT (digits
[j
]);
1672 /* Take the next nibble off the input and add it to what
1673 * we've got in the LSB position. Bottom 'digit' is now
1674 * between 0 and 159.
1676 * "flip" is used to run this loop twice for each byte.
1680 /* Take top nibble. */
1682 digits
[0] += HIGH_NIBBLE (*p
);
1687 /* Take low nibble and bump our pointer "p". */
1689 digits
[0] += LOW_NIBBLE (*p
);
1690 if (byte_order
== BFD_ENDIAN_BIG
)
1697 /* Re-decimalize. We have to do this often enough
1698 * that we don't overflow, but once per nibble is
1699 * overkill. Easier this way, though. Note that the
1700 * carry is often larger than 10 (e.g. max initial
1701 * carry out of lowest nibble is 15, could bubble all
1702 * the way up greater than 10). So we have to do
1703 * the carrying beyond the last current digit.
1706 for (j
= 0; j
< decimal_len
- 1; j
++)
1710 /* "/" won't handle an unsigned char with
1711 * a value that if signed would be negative.
1712 * So extend to longword int via "dummy".
1715 carry
= CARRY_OUT (dummy
);
1716 digits
[j
] = CARRY_LEFT (dummy
);
1718 if (j
>= decimal_digits
&& carry
== 0)
1721 * All higher digits are 0 and we
1722 * no longer have a carry.
1724 * Note: "j" is 0-based, "decimal_digits" is
1727 decimal_digits
= j
+ 1;
1733 /* Ok, now "digits" is the decimal representation, with
1734 the "decimal_digits" actual digits. Print! */
1736 for (i
= decimal_digits
- 1; i
> 0 && digits
[i
] == 0; --i
)
1741 fprintf_filtered (stream
, "%1d", digits
[i
]);
1745 /* VALADDR points to an integer of LEN bytes. Print it in hex on stream. */
1748 print_hex_chars (struct ui_file
*stream
, const gdb_byte
*valaddr
,
1749 unsigned len
, enum bfd_endian byte_order
,
1754 fputs_filtered ("0x", stream
);
1755 if (byte_order
== BFD_ENDIAN_BIG
)
1761 /* Strip leading 0 bytes, but be sure to leave at least a
1762 single byte at the end. */
1763 for (; p
< valaddr
+ len
- 1 && !*p
; ++p
)
1767 const gdb_byte
*first
= p
;
1772 /* When not zero-padding, use a different format for the
1773 very first byte printed. */
1774 if (!zero_pad
&& p
== first
)
1775 fprintf_filtered (stream
, "%x", *p
);
1777 fprintf_filtered (stream
, "%02x", *p
);
1782 p
= valaddr
+ len
- 1;
1786 /* Strip leading 0 bytes, but be sure to leave at least a
1787 single byte at the end. */
1788 for (; p
>= valaddr
+ 1 && !*p
; --p
)
1792 const gdb_byte
*first
= p
;
1797 /* When not zero-padding, use a different format for the
1798 very first byte printed. */
1799 if (!zero_pad
&& p
== first
)
1800 fprintf_filtered (stream
, "%x", *p
);
1802 fprintf_filtered (stream
, "%02x", *p
);
1807 /* VALADDR points to a char integer of LEN bytes.
1808 Print it out in appropriate language form on stream.
1809 Omit any leading zero chars. */
1812 print_char_chars (struct ui_file
*stream
, struct type
*type
,
1813 const gdb_byte
*valaddr
,
1814 unsigned len
, enum bfd_endian byte_order
)
1818 if (byte_order
== BFD_ENDIAN_BIG
)
1821 while (p
< valaddr
+ len
- 1 && *p
== 0)
1824 while (p
< valaddr
+ len
)
1826 LA_EMIT_CHAR (*p
, type
, stream
, '\'');
1832 p
= valaddr
+ len
- 1;
1833 while (p
> valaddr
&& *p
== 0)
1836 while (p
>= valaddr
)
1838 LA_EMIT_CHAR (*p
, type
, stream
, '\'');
1844 /* Print function pointer with inferior address ADDRESS onto stdio
1848 print_function_pointer_address (const struct value_print_options
*options
,
1849 struct gdbarch
*gdbarch
,
1851 struct ui_file
*stream
)
1854 = gdbarch_convert_from_func_ptr_addr (gdbarch
, address
,
1855 current_top_target ());
1857 /* If the function pointer is represented by a description, print
1858 the address of the description. */
1859 if (options
->addressprint
&& func_addr
!= address
)
1861 fputs_filtered ("@", stream
);
1862 fputs_filtered (paddress (gdbarch
, address
), stream
);
1863 fputs_filtered (": ", stream
);
1865 print_address_demangle (options
, gdbarch
, func_addr
, stream
, demangle
);
1869 /* Print on STREAM using the given OPTIONS the index for the element
1870 at INDEX of an array whose index type is INDEX_TYPE. */
1873 maybe_print_array_index (struct type
*index_type
, LONGEST index
,
1874 struct ui_file
*stream
,
1875 const struct value_print_options
*options
)
1877 if (!options
->print_array_indexes
)
1880 LA_PRINT_ARRAY_INDEX (index_type
, index
, stream
, options
);
1883 /* See valprint.h. */
1886 value_print_array_elements (struct value
*val
, struct ui_file
*stream
,
1888 const struct value_print_options
*options
,
1891 unsigned int things_printed
= 0;
1893 struct type
*elttype
, *index_type
;
1895 /* Position of the array element we are examining to see
1896 whether it is repeated. */
1898 /* Number of repetitions we have detected so far. */
1900 LONGEST low_bound
, high_bound
;
1902 struct type
*type
= check_typedef (value_type (val
));
1904 elttype
= TYPE_TARGET_TYPE (type
);
1905 eltlen
= type_length_units (check_typedef (elttype
));
1906 index_type
= type
->index_type ();
1907 if (index_type
->code () == TYPE_CODE_RANGE
)
1908 index_type
= TYPE_TARGET_TYPE (index_type
);
1910 if (get_array_bounds (type
, &low_bound
, &high_bound
))
1912 /* The array length should normally be HIGH_BOUND - LOW_BOUND +
1913 1. But we have to be a little extra careful, because some
1914 languages such as Ada allow LOW_BOUND to be greater than
1915 HIGH_BOUND for empty arrays. In that situation, the array
1916 length is just zero, not negative! */
1917 if (low_bound
> high_bound
)
1920 len
= high_bound
- low_bound
+ 1;
1924 warning (_("unable to get bounds of array, assuming null array"));
1929 annotate_array_section_begin (i
, elttype
);
1931 for (; i
< len
&& things_printed
< options
->print_max
; i
++)
1933 scoped_value_mark free_values
;
1937 if (options
->prettyformat_arrays
)
1939 fprintf_filtered (stream
, ",\n");
1940 print_spaces_filtered (2 + 2 * recurse
, stream
);
1943 fprintf_filtered (stream
, ", ");
1945 else if (options
->prettyformat_arrays
)
1947 fprintf_filtered (stream
, "\n");
1948 print_spaces_filtered (2 + 2 * recurse
, stream
);
1950 wrap_here (n_spaces (2 + 2 * recurse
));
1951 maybe_print_array_index (index_type
, i
+ low_bound
,
1956 /* Only check for reps if repeat_count_threshold is not set to
1957 UINT_MAX (unlimited). */
1958 if (options
->repeat_count_threshold
< UINT_MAX
)
1961 && value_contents_eq (val
, i
* eltlen
,
1970 struct value
*element
= value_from_component (val
, elttype
, eltlen
* i
);
1971 common_val_print (element
, stream
, recurse
+ 1, options
,
1974 if (reps
> options
->repeat_count_threshold
)
1976 annotate_elt_rep (reps
);
1977 fprintf_filtered (stream
, " %p[<repeats %u times>%p]",
1978 metadata_style
.style ().ptr (), reps
, nullptr);
1979 annotate_elt_rep_end ();
1982 things_printed
+= options
->repeat_count_threshold
;
1990 annotate_array_section_end ();
1992 fprintf_filtered (stream
, "...");
1993 if (options
->prettyformat_arrays
)
1995 fprintf_filtered (stream
, "\n");
1996 print_spaces_filtered (2 * recurse
, stream
);
2000 /* Read LEN bytes of target memory at address MEMADDR, placing the
2001 results in GDB's memory at MYADDR. Returns a count of the bytes
2002 actually read, and optionally a target_xfer_status value in the
2003 location pointed to by ERRPTR if ERRPTR is non-null. */
2005 /* FIXME: cagney/1999-10-14: Only used by val_print_string. Can this
2006 function be eliminated. */
2009 partial_memory_read (CORE_ADDR memaddr
, gdb_byte
*myaddr
,
2010 int len
, int *errptr
)
2012 int nread
; /* Number of bytes actually read. */
2013 int errcode
; /* Error from last read. */
2015 /* First try a complete read. */
2016 errcode
= target_read_memory (memaddr
, myaddr
, len
);
2024 /* Loop, reading one byte at a time until we get as much as we can. */
2025 for (errcode
= 0, nread
= 0; len
> 0 && errcode
== 0; nread
++, len
--)
2027 errcode
= target_read_memory (memaddr
++, myaddr
++, 1);
2029 /* If an error, the last read was unsuccessful, so adjust count. */
2042 /* Read a string from the inferior, at ADDR, with LEN characters of
2043 WIDTH bytes each. Fetch at most FETCHLIMIT characters. BUFFER
2044 will be set to a newly allocated buffer containing the string, and
2045 BYTES_READ will be set to the number of bytes read. Returns 0 on
2046 success, or a target_xfer_status on failure.
2048 If LEN > 0, reads the lesser of LEN or FETCHLIMIT characters
2049 (including eventual NULs in the middle or end of the string).
2051 If LEN is -1, stops at the first null character (not necessarily
2052 the first null byte) up to a maximum of FETCHLIMIT characters. Set
2053 FETCHLIMIT to UINT_MAX to read as many characters as possible from
2056 Unless an exception is thrown, BUFFER will always be allocated, even on
2057 failure. In this case, some characters might have been read before the
2058 failure happened. Check BYTES_READ to recognize this situation. */
2061 read_string (CORE_ADDR addr
, int len
, int width
, unsigned int fetchlimit
,
2062 enum bfd_endian byte_order
, gdb::unique_xmalloc_ptr
<gdb_byte
> *buffer
,
2065 int errcode
; /* Errno returned from bad reads. */
2066 unsigned int nfetch
; /* Chars to fetch / chars fetched. */
2067 gdb_byte
*bufptr
; /* Pointer to next available byte in
2070 /* Loop until we either have all the characters, or we encounter
2071 some error, such as bumping into the end of the address space. */
2073 buffer
->reset (nullptr);
2077 /* We want fetchlimit chars, so we might as well read them all in
2079 unsigned int fetchlen
= std::min ((unsigned) len
, fetchlimit
);
2081 buffer
->reset ((gdb_byte
*) xmalloc (fetchlen
* width
));
2082 bufptr
= buffer
->get ();
2084 nfetch
= partial_memory_read (addr
, bufptr
, fetchlen
* width
, &errcode
)
2086 addr
+= nfetch
* width
;
2087 bufptr
+= nfetch
* width
;
2091 unsigned long bufsize
= 0;
2092 unsigned int chunksize
; /* Size of each fetch, in chars. */
2093 int found_nul
; /* Non-zero if we found the nul char. */
2094 gdb_byte
*limit
; /* First location past end of fetch buffer. */
2097 /* We are looking for a NUL terminator to end the fetching, so we
2098 might as well read in blocks that are large enough to be efficient,
2099 but not so large as to be slow if fetchlimit happens to be large.
2100 So we choose the minimum of 8 and fetchlimit. We used to use 200
2101 instead of 8 but 200 is way too big for remote debugging over a
2103 chunksize
= std::min (8u, fetchlimit
);
2108 nfetch
= std::min ((unsigned long) chunksize
, fetchlimit
- bufsize
);
2110 if (*buffer
== NULL
)
2111 buffer
->reset ((gdb_byte
*) xmalloc (nfetch
* width
));
2113 buffer
->reset ((gdb_byte
*) xrealloc (buffer
->release (),
2114 (nfetch
+ bufsize
) * width
));
2116 bufptr
= buffer
->get () + bufsize
* width
;
2119 /* Read as much as we can. */
2120 nfetch
= partial_memory_read (addr
, bufptr
, nfetch
* width
, &errcode
)
2123 /* Scan this chunk for the null character that terminates the string
2124 to print. If found, we don't need to fetch any more. Note
2125 that bufptr is explicitly left pointing at the next character
2126 after the null character, or at the next character after the end
2129 limit
= bufptr
+ nfetch
* width
;
2130 while (bufptr
< limit
)
2134 c
= extract_unsigned_integer (bufptr
, width
, byte_order
);
2139 /* We don't care about any error which happened after
2140 the NUL terminator. */
2147 while (errcode
== 0 /* no error */
2148 && bufptr
- buffer
->get () < fetchlimit
* width
/* no overrun */
2149 && !found_nul
); /* haven't found NUL yet */
2152 { /* Length of string is really 0! */
2153 /* We always allocate *buffer. */
2154 buffer
->reset ((gdb_byte
*) xmalloc (1));
2155 bufptr
= buffer
->get ();
2159 /* bufptr and addr now point immediately beyond the last byte which we
2160 consider part of the string (including a '\0' which ends the string). */
2161 *bytes_read
= bufptr
- buffer
->get ();
2168 /* Return true if print_wchar can display W without resorting to a
2169 numeric escape, false otherwise. */
2172 wchar_printable (gdb_wchar_t w
)
2174 return (gdb_iswprint (w
)
2175 || w
== LCST ('\a') || w
== LCST ('\b')
2176 || w
== LCST ('\f') || w
== LCST ('\n')
2177 || w
== LCST ('\r') || w
== LCST ('\t')
2178 || w
== LCST ('\v'));
2181 /* A helper function that converts the contents of STRING to wide
2182 characters and then appends them to OUTPUT. */
2185 append_string_as_wide (const char *string
,
2186 struct obstack
*output
)
2188 for (; *string
; ++string
)
2190 gdb_wchar_t w
= gdb_btowc (*string
);
2191 obstack_grow (output
, &w
, sizeof (gdb_wchar_t
));
2195 /* Print a wide character W to OUTPUT. ORIG is a pointer to the
2196 original (target) bytes representing the character, ORIG_LEN is the
2197 number of valid bytes. WIDTH is the number of bytes in a base
2198 characters of the type. OUTPUT is an obstack to which wide
2199 characters are emitted. QUOTER is a (narrow) character indicating
2200 the style of quotes surrounding the character to be printed.
2201 NEED_ESCAPE is an in/out flag which is used to track numeric
2202 escapes across calls. */
2205 print_wchar (gdb_wint_t w
, const gdb_byte
*orig
,
2206 int orig_len
, int width
,
2207 enum bfd_endian byte_order
,
2208 struct obstack
*output
,
2209 int quoter
, int *need_escapep
)
2211 int need_escape
= *need_escapep
;
2215 /* iswprint implementation on Windows returns 1 for tab character.
2216 In order to avoid different printout on this host, we explicitly
2217 use wchar_printable function. */
2221 obstack_grow_wstr (output
, LCST ("\\a"));
2224 obstack_grow_wstr (output
, LCST ("\\b"));
2227 obstack_grow_wstr (output
, LCST ("\\f"));
2230 obstack_grow_wstr (output
, LCST ("\\n"));
2233 obstack_grow_wstr (output
, LCST ("\\r"));
2236 obstack_grow_wstr (output
, LCST ("\\t"));
2239 obstack_grow_wstr (output
, LCST ("\\v"));
2243 if (wchar_printable (w
) && (!need_escape
|| (!gdb_iswdigit (w
)
2245 && w
!= LCST ('9'))))
2247 gdb_wchar_t wchar
= w
;
2249 if (w
== gdb_btowc (quoter
) || w
== LCST ('\\'))
2250 obstack_grow_wstr (output
, LCST ("\\"));
2251 obstack_grow (output
, &wchar
, sizeof (gdb_wchar_t
));
2257 for (i
= 0; i
+ width
<= orig_len
; i
+= width
)
2262 value
= extract_unsigned_integer (&orig
[i
], width
,
2264 /* If the value fits in 3 octal digits, print it that
2265 way. Otherwise, print it as a hex escape. */
2267 xsnprintf (octal
, sizeof (octal
), "\\%.3o",
2268 (int) (value
& 0777));
2270 xsnprintf (octal
, sizeof (octal
), "\\x%lx", (long) value
);
2271 append_string_as_wide (octal
, output
);
2273 /* If we somehow have extra bytes, print them now. */
2274 while (i
< orig_len
)
2278 xsnprintf (octal
, sizeof (octal
), "\\%.3o", orig
[i
] & 0xff);
2279 append_string_as_wide (octal
, output
);
2290 /* Print the character C on STREAM as part of the contents of a
2291 literal string whose delimiter is QUOTER. ENCODING names the
2295 generic_emit_char (int c
, struct type
*type
, struct ui_file
*stream
,
2296 int quoter
, const char *encoding
)
2298 enum bfd_endian byte_order
2299 = type_byte_order (type
);
2301 int need_escape
= 0;
2303 c_buf
= (gdb_byte
*) alloca (TYPE_LENGTH (type
));
2304 pack_long (c_buf
, type
, c
);
2306 wchar_iterator
iter (c_buf
, TYPE_LENGTH (type
), encoding
, TYPE_LENGTH (type
));
2308 /* This holds the printable form of the wchar_t data. */
2309 auto_obstack wchar_buf
;
2315 const gdb_byte
*buf
;
2317 int print_escape
= 1;
2318 enum wchar_iterate_result result
;
2320 num_chars
= iter
.iterate (&result
, &chars
, &buf
, &buflen
);
2325 /* If all characters are printable, print them. Otherwise,
2326 we're going to have to print an escape sequence. We
2327 check all characters because we want to print the target
2328 bytes in the escape sequence, and we don't know character
2329 boundaries there. */
2333 for (i
= 0; i
< num_chars
; ++i
)
2334 if (!wchar_printable (chars
[i
]))
2342 for (i
= 0; i
< num_chars
; ++i
)
2343 print_wchar (chars
[i
], buf
, buflen
,
2344 TYPE_LENGTH (type
), byte_order
,
2345 &wchar_buf
, quoter
, &need_escape
);
2349 /* This handles the NUM_CHARS == 0 case as well. */
2351 print_wchar (gdb_WEOF
, buf
, buflen
, TYPE_LENGTH (type
),
2352 byte_order
, &wchar_buf
, quoter
, &need_escape
);
2355 /* The output in the host encoding. */
2356 auto_obstack output
;
2358 convert_between_encodings (INTERMEDIATE_ENCODING
, host_charset (),
2359 (gdb_byte
*) obstack_base (&wchar_buf
),
2360 obstack_object_size (&wchar_buf
),
2361 sizeof (gdb_wchar_t
), &output
, translit_char
);
2362 obstack_1grow (&output
, '\0');
2364 fputs_filtered ((const char *) obstack_base (&output
), stream
);
2367 /* Return the repeat count of the next character/byte in ITER,
2368 storing the result in VEC. */
2371 count_next_character (wchar_iterator
*iter
,
2372 std::vector
<converted_character
> *vec
)
2374 struct converted_character
*current
;
2378 struct converted_character tmp
;
2382 = iter
->iterate (&tmp
.result
, &chars
, &tmp
.buf
, &tmp
.buflen
);
2383 if (tmp
.num_chars
> 0)
2385 gdb_assert (tmp
.num_chars
< MAX_WCHARS
);
2386 memcpy (tmp
.chars
, chars
, tmp
.num_chars
* sizeof (gdb_wchar_t
));
2388 vec
->push_back (tmp
);
2391 current
= &vec
->back ();
2393 /* Count repeated characters or bytes. */
2394 current
->repeat_count
= 1;
2395 if (current
->num_chars
== -1)
2403 struct converted_character d
;
2410 /* Get the next character. */
2411 d
.num_chars
= iter
->iterate (&d
.result
, &chars
, &d
.buf
, &d
.buflen
);
2413 /* If a character was successfully converted, save the character
2414 into the converted character. */
2415 if (d
.num_chars
> 0)
2417 gdb_assert (d
.num_chars
< MAX_WCHARS
);
2418 memcpy (d
.chars
, chars
, WCHAR_BUFLEN (d
.num_chars
));
2421 /* Determine if the current character is the same as this
2423 if (d
.num_chars
== current
->num_chars
&& d
.result
== current
->result
)
2425 /* There are two cases to consider:
2427 1) Equality of converted character (num_chars > 0)
2428 2) Equality of non-converted character (num_chars == 0) */
2429 if ((current
->num_chars
> 0
2430 && memcmp (current
->chars
, d
.chars
,
2431 WCHAR_BUFLEN (current
->num_chars
)) == 0)
2432 || (current
->num_chars
== 0
2433 && current
->buflen
== d
.buflen
2434 && memcmp (current
->buf
, d
.buf
, current
->buflen
) == 0))
2435 ++current
->repeat_count
;
2443 /* Push this next converted character onto the result vector. */
2444 repeat
= current
->repeat_count
;
2450 /* Print the characters in CHARS to the OBSTACK. QUOTE_CHAR is the quote
2451 character to use with string output. WIDTH is the size of the output
2452 character type. BYTE_ORDER is the target byte order. OPTIONS
2453 is the user's print options. */
2456 print_converted_chars_to_obstack (struct obstack
*obstack
,
2457 const std::vector
<converted_character
> &chars
,
2458 int quote_char
, int width
,
2459 enum bfd_endian byte_order
,
2460 const struct value_print_options
*options
)
2463 const converted_character
*elem
;
2464 enum {START
, SINGLE
, REPEAT
, INCOMPLETE
, FINISH
} state
, last
;
2465 gdb_wchar_t wide_quote_char
= gdb_btowc (quote_char
);
2466 int need_escape
= 0;
2468 /* Set the start state. */
2470 last
= state
= START
;
2478 /* Nothing to do. */
2485 /* We are outputting a single character
2486 (< options->repeat_count_threshold). */
2490 /* We were outputting some other type of content, so we
2491 must output and a comma and a quote. */
2493 obstack_grow_wstr (obstack
, LCST (", "));
2494 obstack_grow (obstack
, &wide_quote_char
, sizeof (gdb_wchar_t
));
2496 /* Output the character. */
2497 for (j
= 0; j
< elem
->repeat_count
; ++j
)
2499 if (elem
->result
== wchar_iterate_ok
)
2500 print_wchar (elem
->chars
[0], elem
->buf
, elem
->buflen
, width
,
2501 byte_order
, obstack
, quote_char
, &need_escape
);
2503 print_wchar (gdb_WEOF
, elem
->buf
, elem
->buflen
, width
,
2504 byte_order
, obstack
, quote_char
, &need_escape
);
2513 /* We are outputting a character with a repeat count
2514 greater than options->repeat_count_threshold. */
2518 /* We were outputting a single string. Terminate the
2520 obstack_grow (obstack
, &wide_quote_char
, sizeof (gdb_wchar_t
));
2523 obstack_grow_wstr (obstack
, LCST (", "));
2525 /* Output the character and repeat string. */
2526 obstack_grow_wstr (obstack
, LCST ("'"));
2527 if (elem
->result
== wchar_iterate_ok
)
2528 print_wchar (elem
->chars
[0], elem
->buf
, elem
->buflen
, width
,
2529 byte_order
, obstack
, quote_char
, &need_escape
);
2531 print_wchar (gdb_WEOF
, elem
->buf
, elem
->buflen
, width
,
2532 byte_order
, obstack
, quote_char
, &need_escape
);
2533 obstack_grow_wstr (obstack
, LCST ("'"));
2534 std::string s
= string_printf (_(" <repeats %u times>"),
2535 elem
->repeat_count
);
2536 for (j
= 0; s
[j
]; ++j
)
2538 gdb_wchar_t w
= gdb_btowc (s
[j
]);
2539 obstack_grow (obstack
, &w
, sizeof (gdb_wchar_t
));
2545 /* We are outputting an incomplete sequence. */
2548 /* If we were outputting a string of SINGLE characters,
2549 terminate the quote. */
2550 obstack_grow (obstack
, &wide_quote_char
, sizeof (gdb_wchar_t
));
2553 obstack_grow_wstr (obstack
, LCST (", "));
2555 /* Output the incomplete sequence string. */
2556 obstack_grow_wstr (obstack
, LCST ("<incomplete sequence "));
2557 print_wchar (gdb_WEOF
, elem
->buf
, elem
->buflen
, width
, byte_order
,
2558 obstack
, 0, &need_escape
);
2559 obstack_grow_wstr (obstack
, LCST (">"));
2561 /* We do not attempt to output anything after this. */
2566 /* All done. If we were outputting a string of SINGLE
2567 characters, the string must be terminated. Otherwise,
2568 REPEAT and INCOMPLETE are always left properly terminated. */
2570 obstack_grow (obstack
, &wide_quote_char
, sizeof (gdb_wchar_t
));
2575 /* Get the next element and state. */
2577 if (state
!= FINISH
)
2579 elem
= &chars
[idx
++];
2580 switch (elem
->result
)
2582 case wchar_iterate_ok
:
2583 case wchar_iterate_invalid
:
2584 if (elem
->repeat_count
> options
->repeat_count_threshold
)
2590 case wchar_iterate_incomplete
:
2594 case wchar_iterate_eof
:
2602 /* Print the character string STRING, printing at most LENGTH
2603 characters. LENGTH is -1 if the string is nul terminated. TYPE is
2604 the type of each character. OPTIONS holds the printing options;
2605 printing stops early if the number hits print_max; repeat counts
2606 are printed as appropriate. Print ellipses at the end if we had to
2607 stop before printing LENGTH characters, or if FORCE_ELLIPSES.
2608 QUOTE_CHAR is the character to print at each end of the string. If
2609 C_STYLE_TERMINATOR is true, and the last character is 0, then it is
2613 generic_printstr (struct ui_file
*stream
, struct type
*type
,
2614 const gdb_byte
*string
, unsigned int length
,
2615 const char *encoding
, int force_ellipses
,
2616 int quote_char
, int c_style_terminator
,
2617 const struct value_print_options
*options
)
2619 enum bfd_endian byte_order
= type_byte_order (type
);
2621 int width
= TYPE_LENGTH (type
);
2623 struct converted_character
*last
;
2627 unsigned long current_char
= 1;
2629 for (i
= 0; current_char
; ++i
)
2632 current_char
= extract_unsigned_integer (string
+ i
* width
,
2638 /* If the string was not truncated due to `set print elements', and
2639 the last byte of it is a null, we don't print that, in
2640 traditional C style. */
2641 if (c_style_terminator
2644 && (extract_unsigned_integer (string
+ (length
- 1) * width
,
2645 width
, byte_order
) == 0))
2650 fputs_filtered ("\"\"", stream
);
2654 /* Arrange to iterate over the characters, in wchar_t form. */
2655 wchar_iterator
iter (string
, length
* width
, encoding
, width
);
2656 std::vector
<converted_character
> converted_chars
;
2658 /* Convert characters until the string is over or the maximum
2659 number of printed characters has been reached. */
2661 while (i
< options
->print_max
)
2667 /* Grab the next character and repeat count. */
2668 r
= count_next_character (&iter
, &converted_chars
);
2670 /* If less than zero, the end of the input string was reached. */
2674 /* Otherwise, add the count to the total print count and get
2675 the next character. */
2679 /* Get the last element and determine if the entire string was
2681 last
= &converted_chars
.back ();
2682 finished
= (last
->result
== wchar_iterate_eof
);
2684 /* Ensure that CONVERTED_CHARS is terminated. */
2685 last
->result
= wchar_iterate_eof
;
2687 /* WCHAR_BUF is the obstack we use to represent the string in
2689 auto_obstack wchar_buf
;
2691 /* Print the output string to the obstack. */
2692 print_converted_chars_to_obstack (&wchar_buf
, converted_chars
, quote_char
,
2693 width
, byte_order
, options
);
2695 if (force_ellipses
|| !finished
)
2696 obstack_grow_wstr (&wchar_buf
, LCST ("..."));
2698 /* OUTPUT is where we collect `char's for printing. */
2699 auto_obstack output
;
2701 convert_between_encodings (INTERMEDIATE_ENCODING
, host_charset (),
2702 (gdb_byte
*) obstack_base (&wchar_buf
),
2703 obstack_object_size (&wchar_buf
),
2704 sizeof (gdb_wchar_t
), &output
, translit_char
);
2705 obstack_1grow (&output
, '\0');
2707 fputs_filtered ((const char *) obstack_base (&output
), stream
);
2710 /* Print a string from the inferior, starting at ADDR and printing up to LEN
2711 characters, of WIDTH bytes a piece, to STREAM. If LEN is -1, printing
2712 stops at the first null byte, otherwise printing proceeds (including null
2713 bytes) until either print_max or LEN characters have been printed,
2714 whichever is smaller. ENCODING is the name of the string's
2715 encoding. It can be NULL, in which case the target encoding is
2719 val_print_string (struct type
*elttype
, const char *encoding
,
2720 CORE_ADDR addr
, int len
,
2721 struct ui_file
*stream
,
2722 const struct value_print_options
*options
)
2724 int force_ellipsis
= 0; /* Force ellipsis to be printed if nonzero. */
2725 int err
; /* Non-zero if we got a bad read. */
2726 int found_nul
; /* Non-zero if we found the nul char. */
2727 unsigned int fetchlimit
; /* Maximum number of chars to print. */
2729 gdb::unique_xmalloc_ptr
<gdb_byte
> buffer
; /* Dynamically growable fetch buffer. */
2730 struct gdbarch
*gdbarch
= get_type_arch (elttype
);
2731 enum bfd_endian byte_order
= type_byte_order (elttype
);
2732 int width
= TYPE_LENGTH (elttype
);
2734 /* First we need to figure out the limit on the number of characters we are
2735 going to attempt to fetch and print. This is actually pretty simple. If
2736 LEN >= zero, then the limit is the minimum of LEN and print_max. If
2737 LEN is -1, then the limit is print_max. This is true regardless of
2738 whether print_max is zero, UINT_MAX (unlimited), or something in between,
2739 because finding the null byte (or available memory) is what actually
2740 limits the fetch. */
2742 fetchlimit
= (len
== -1 ? options
->print_max
: std::min ((unsigned) len
,
2743 options
->print_max
));
2745 err
= read_string (addr
, len
, width
, fetchlimit
, byte_order
,
2746 &buffer
, &bytes_read
);
2750 /* We now have either successfully filled the buffer to fetchlimit,
2751 or terminated early due to an error or finding a null char when
2754 /* Determine found_nul by looking at the last character read. */
2756 if (bytes_read
>= width
)
2757 found_nul
= extract_unsigned_integer (buffer
.get () + bytes_read
- width
,
2758 width
, byte_order
) == 0;
2759 if (len
== -1 && !found_nul
)
2763 /* We didn't find a NUL terminator we were looking for. Attempt
2764 to peek at the next character. If not successful, or it is not
2765 a null byte, then force ellipsis to be printed. */
2767 peekbuf
= (gdb_byte
*) alloca (width
);
2769 if (target_read_memory (addr
, peekbuf
, width
) == 0
2770 && extract_unsigned_integer (peekbuf
, width
, byte_order
) != 0)
2773 else if ((len
>= 0 && err
!= 0) || (len
> bytes_read
/ width
))
2775 /* Getting an error when we have a requested length, or fetching less
2776 than the number of characters actually requested, always make us
2781 /* If we get an error before fetching anything, don't print a string.
2782 But if we fetch something and then get an error, print the string
2783 and then the error message. */
2784 if (err
== 0 || bytes_read
> 0)
2786 LA_PRINT_STRING (stream
, elttype
, buffer
.get (), bytes_read
/ width
,
2787 encoding
, force_ellipsis
, options
);
2792 std::string str
= memory_error_message (TARGET_XFER_E_IO
, gdbarch
, addr
);
2794 fprintf_filtered (stream
, _("<error: %ps>"),
2795 styled_string (metadata_style
.style (),
2799 return (bytes_read
/ width
);
2802 /* Handle 'show print max-depth'. */
2805 show_print_max_depth (struct ui_file
*file
, int from_tty
,
2806 struct cmd_list_element
*c
, const char *value
)
2808 fprintf_filtered (file
, _("Maximum print depth is %s.\n"), value
);
2812 /* The 'set input-radix' command writes to this auxiliary variable.
2813 If the requested radix is valid, INPUT_RADIX is updated; otherwise,
2814 it is left unchanged. */
2816 static unsigned input_radix_1
= 10;
2818 /* Validate an input or output radix setting, and make sure the user
2819 knows what they really did here. Radix setting is confusing, e.g.
2820 setting the input radix to "10" never changes it! */
2823 set_input_radix (const char *args
, int from_tty
, struct cmd_list_element
*c
)
2825 set_input_radix_1 (from_tty
, input_radix_1
);
2829 set_input_radix_1 (int from_tty
, unsigned radix
)
2831 /* We don't currently disallow any input radix except 0 or 1, which don't
2832 make any mathematical sense. In theory, we can deal with any input
2833 radix greater than 1, even if we don't have unique digits for every
2834 value from 0 to radix-1, but in practice we lose on large radix values.
2835 We should either fix the lossage or restrict the radix range more.
2840 input_radix_1
= input_radix
;
2841 error (_("Nonsense input radix ``decimal %u''; input radix unchanged."),
2844 input_radix_1
= input_radix
= radix
;
2847 printf_filtered (_("Input radix now set to "
2848 "decimal %u, hex %x, octal %o.\n"),
2849 radix
, radix
, radix
);
2853 /* The 'set output-radix' command writes to this auxiliary variable.
2854 If the requested radix is valid, OUTPUT_RADIX is updated,
2855 otherwise, it is left unchanged. */
2857 static unsigned output_radix_1
= 10;
2860 set_output_radix (const char *args
, int from_tty
, struct cmd_list_element
*c
)
2862 set_output_radix_1 (from_tty
, output_radix_1
);
2866 set_output_radix_1 (int from_tty
, unsigned radix
)
2868 /* Validate the radix and disallow ones that we aren't prepared to
2869 handle correctly, leaving the radix unchanged. */
2873 user_print_options
.output_format
= 'x'; /* hex */
2876 user_print_options
.output_format
= 0; /* decimal */
2879 user_print_options
.output_format
= 'o'; /* octal */
2882 output_radix_1
= output_radix
;
2883 error (_("Unsupported output radix ``decimal %u''; "
2884 "output radix unchanged."),
2887 output_radix_1
= output_radix
= radix
;
2890 printf_filtered (_("Output radix now set to "
2891 "decimal %u, hex %x, octal %o.\n"),
2892 radix
, radix
, radix
);
2896 /* Set both the input and output radix at once. Try to set the output radix
2897 first, since it has the most restrictive range. An radix that is valid as
2898 an output radix is also valid as an input radix.
2900 It may be useful to have an unusual input radix. If the user wishes to
2901 set an input radix that is not valid as an output radix, he needs to use
2902 the 'set input-radix' command. */
2905 set_radix (const char *arg
, int from_tty
)
2909 radix
= (arg
== NULL
) ? 10 : parse_and_eval_long (arg
);
2910 set_output_radix_1 (0, radix
);
2911 set_input_radix_1 (0, radix
);
2914 printf_filtered (_("Input and output radices now set to "
2915 "decimal %u, hex %x, octal %o.\n"),
2916 radix
, radix
, radix
);
2920 /* Show both the input and output radices. */
2923 show_radix (const char *arg
, int from_tty
)
2927 if (input_radix
== output_radix
)
2929 printf_filtered (_("Input and output radices set to "
2930 "decimal %u, hex %x, octal %o.\n"),
2931 input_radix
, input_radix
, input_radix
);
2935 printf_filtered (_("Input radix set to decimal "
2936 "%u, hex %x, octal %o.\n"),
2937 input_radix
, input_radix
, input_radix
);
2938 printf_filtered (_("Output radix set to decimal "
2939 "%u, hex %x, octal %o.\n"),
2940 output_radix
, output_radix
, output_radix
);
2946 /* Controls printing of vtbl's. */
2948 show_vtblprint (struct ui_file
*file
, int from_tty
,
2949 struct cmd_list_element
*c
, const char *value
)
2951 fprintf_filtered (file
, _("\
2952 Printing of C++ virtual function tables is %s.\n"),
2956 /* Controls looking up an object's derived type using what we find in
2959 show_objectprint (struct ui_file
*file
, int from_tty
,
2960 struct cmd_list_element
*c
,
2963 fprintf_filtered (file
, _("\
2964 Printing of object's derived type based on vtable info is %s.\n"),
2969 show_static_field_print (struct ui_file
*file
, int from_tty
,
2970 struct cmd_list_element
*c
,
2973 fprintf_filtered (file
,
2974 _("Printing of C++ static members is %s.\n"),
2980 /* A couple typedefs to make writing the options a bit more
2982 using boolean_option_def
2983 = gdb::option::boolean_option_def
<value_print_options
>;
2984 using uinteger_option_def
2985 = gdb::option::uinteger_option_def
<value_print_options
>;
2986 using zuinteger_unlimited_option_def
2987 = gdb::option::zuinteger_unlimited_option_def
<value_print_options
>;
2989 /* Definitions of options for the "print" and "compile print"
2991 static const gdb::option::option_def value_print_option_defs
[] = {
2993 boolean_option_def
{
2995 [] (value_print_options
*opt
) { return &opt
->addressprint
; },
2996 show_addressprint
, /* show_cmd_cb */
2997 N_("Set printing of addresses."),
2998 N_("Show printing of addresses."),
2999 NULL
, /* help_doc */
3002 boolean_option_def
{
3004 [] (value_print_options
*opt
) { return &opt
->prettyformat_arrays
; },
3005 show_prettyformat_arrays
, /* show_cmd_cb */
3006 N_("Set pretty formatting of arrays."),
3007 N_("Show pretty formatting of arrays."),
3008 NULL
, /* help_doc */
3011 boolean_option_def
{
3013 [] (value_print_options
*opt
) { return &opt
->print_array_indexes
; },
3014 show_print_array_indexes
, /* show_cmd_cb */
3015 N_("Set printing of array indexes."),
3016 N_("Show printing of array indexes."),
3017 NULL
, /* help_doc */
3020 uinteger_option_def
{
3022 [] (value_print_options
*opt
) { return &opt
->print_max
; },
3023 show_print_max
, /* show_cmd_cb */
3024 N_("Set limit on string chars or array elements to print."),
3025 N_("Show limit on string chars or array elements to print."),
3026 N_("\"unlimited\" causes there to be no limit."),
3029 zuinteger_unlimited_option_def
{
3031 [] (value_print_options
*opt
) { return &opt
->max_depth
; },
3032 show_print_max_depth
, /* show_cmd_cb */
3033 N_("Set maximum print depth for nested structures, unions and arrays."),
3034 N_("Show maximum print depth for nested structures, unions, and arrays."),
3035 N_("When structures, unions, or arrays are nested beyond this depth then they\n\
3036 will be replaced with either '{...}' or '(...)' depending on the language.\n\
3037 Use \"unlimited\" to print the complete structure.")
3040 boolean_option_def
{
3042 [] (value_print_options
*opt
) { return &opt
->stop_print_at_null
; },
3043 show_stop_print_at_null
, /* show_cmd_cb */
3044 N_("Set printing of char arrays to stop at first null char."),
3045 N_("Show printing of char arrays to stop at first null char."),
3046 NULL
, /* help_doc */
3049 boolean_option_def
{
3051 [] (value_print_options
*opt
) { return &opt
->objectprint
; },
3052 show_objectprint
, /* show_cmd_cb */
3053 _("Set printing of C++ virtual function tables."),
3054 _("Show printing of C++ virtual function tables."),
3055 NULL
, /* help_doc */
3058 boolean_option_def
{
3060 [] (value_print_options
*opt
) { return &opt
->prettyformat_structs
; },
3061 show_prettyformat_structs
, /* show_cmd_cb */
3062 N_("Set pretty formatting of structures."),
3063 N_("Show pretty formatting of structures."),
3064 NULL
, /* help_doc */
3067 boolean_option_def
{
3069 [] (value_print_options
*opt
) { return &opt
->raw
; },
3070 NULL
, /* show_cmd_cb */
3071 N_("Set whether to print values in raw form."),
3072 N_("Show whether to print values in raw form."),
3073 N_("If set, values are printed in raw form, bypassing any\n\
3074 pretty-printers for that value.")
3077 uinteger_option_def
{
3079 [] (value_print_options
*opt
) { return &opt
->repeat_count_threshold
; },
3080 show_repeat_count_threshold
, /* show_cmd_cb */
3081 N_("Set threshold for repeated print elements."),
3082 N_("Show threshold for repeated print elements."),
3083 N_("\"unlimited\" causes all elements to be individually printed."),
3086 boolean_option_def
{
3088 [] (value_print_options
*opt
) { return &opt
->static_field_print
; },
3089 show_static_field_print
, /* show_cmd_cb */
3090 N_("Set printing of C++ static members."),
3091 N_("Show printing of C++ static members."),
3092 NULL
, /* help_doc */
3095 boolean_option_def
{
3097 [] (value_print_options
*opt
) { return &opt
->symbol_print
; },
3098 show_symbol_print
, /* show_cmd_cb */
3099 N_("Set printing of symbol names when printing pointers."),
3100 N_("Show printing of symbol names when printing pointers."),
3101 NULL
, /* help_doc */
3104 boolean_option_def
{
3106 [] (value_print_options
*opt
) { return &opt
->unionprint
; },
3107 show_unionprint
, /* show_cmd_cb */
3108 N_("Set printing of unions interior to structures."),
3109 N_("Show printing of unions interior to structures."),
3110 NULL
, /* help_doc */
3113 boolean_option_def
{
3115 [] (value_print_options
*opt
) { return &opt
->vtblprint
; },
3116 show_vtblprint
, /* show_cmd_cb */
3117 N_("Set printing of C++ virtual function tables."),
3118 N_("Show printing of C++ virtual function tables."),
3119 NULL
, /* help_doc */
3123 /* See valprint.h. */
3125 gdb::option::option_def_group
3126 make_value_print_options_def_group (value_print_options
*opts
)
3128 return {{value_print_option_defs
}, opts
};
3131 void _initialize_valprint ();
3133 _initialize_valprint ()
3135 cmd_list_element
*cmd
;
3137 add_basic_prefix_cmd ("print", no_class
,
3138 _("Generic command for setting how things print."),
3139 &setprintlist
, "set print ", 0, &setlist
);
3140 add_alias_cmd ("p", "print", no_class
, 1, &setlist
);
3141 /* Prefer set print to set prompt. */
3142 add_alias_cmd ("pr", "print", no_class
, 1, &setlist
);
3144 add_show_prefix_cmd ("print", no_class
,
3145 _("Generic command for showing print settings."),
3146 &showprintlist
, "show print ", 0, &showlist
);
3147 add_alias_cmd ("p", "print", no_class
, 1, &showlist
);
3148 add_alias_cmd ("pr", "print", no_class
, 1, &showlist
);
3150 cmd
= add_basic_prefix_cmd ("raw", no_class
,
3152 Generic command for setting what things to print in \"raw\" mode."),
3153 &setprintrawlist
, "set print raw ", 0,
3155 deprecate_cmd (cmd
, nullptr);
3157 cmd
= add_show_prefix_cmd ("raw", no_class
,
3158 _("Generic command for showing \"print raw\" settings."),
3159 &showprintrawlist
, "show print raw ", 0,
3161 deprecate_cmd (cmd
, nullptr);
3163 gdb::option::add_setshow_cmds_for_options
3164 (class_support
, &user_print_options
, value_print_option_defs
,
3165 &setprintlist
, &showprintlist
);
3167 add_setshow_zuinteger_cmd ("input-radix", class_support
, &input_radix_1
,
3169 Set default input radix for entering numbers."), _("\
3170 Show default input radix for entering numbers."), NULL
,
3173 &setlist
, &showlist
);
3175 add_setshow_zuinteger_cmd ("output-radix", class_support
, &output_radix_1
,
3177 Set default output radix for printing of values."), _("\
3178 Show default output radix for printing of values."), NULL
,
3181 &setlist
, &showlist
);
3183 /* The "set radix" and "show radix" commands are special in that
3184 they are like normal set and show commands but allow two normally
3185 independent variables to be either set or shown with a single
3186 command. So the usual deprecated_add_set_cmd() and [deleted]
3187 add_show_from_set() commands aren't really appropriate. */
3188 /* FIXME: i18n: With the new add_setshow_integer command, that is no
3189 longer true - show can display anything. */
3190 add_cmd ("radix", class_support
, set_radix
, _("\
3191 Set default input and output number radices.\n\
3192 Use 'set input-radix' or 'set output-radix' to independently set each.\n\
3193 Without an argument, sets both radices back to the default value of 10."),
3195 add_cmd ("radix", class_support
, show_radix
, _("\
3196 Show the default input and output number radices.\n\
3197 Use 'show input-radix' or 'show output-radix' to independently show each."),