1 /* Print values for GDB, the GNU debugger.
3 Copyright (C) 1986, 1988-2012 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/>. */
21 #include "gdb_string.h"
31 #include "floatformat.h"
33 #include "exceptions.h"
35 #include "python/python.h"
37 #include "gdb_obstack.h"
43 /* Prototypes for local functions */
45 static int partial_memory_read (CORE_ADDR memaddr
, gdb_byte
*myaddr
,
46 int len
, int *errnoptr
);
48 static void show_print (char *, int);
50 static void set_print (char *, int);
52 static void set_radix (char *, int);
54 static void show_radix (char *, int);
56 static void set_input_radix (char *, int, struct cmd_list_element
*);
58 static void set_input_radix_1 (int, unsigned);
60 static void set_output_radix (char *, int, struct cmd_list_element
*);
62 static void set_output_radix_1 (int, unsigned);
64 void _initialize_valprint (void);
66 #define PRINT_MAX_DEFAULT 200 /* Start print_max off at this value. */
68 struct value_print_options user_print_options
=
70 Val_pretty_default
, /* pretty */
71 0, /* prettyprint_arrays */
72 0, /* prettyprint_structs */
77 PRINT_MAX_DEFAULT
, /* print_max */
78 10, /* repeat_count_threshold */
79 0, /* output_format */
81 0, /* stop_print_at_null */
83 0, /* print_array_indexes */
85 1, /* static_field_print */
86 1, /* pascal_static_field_print */
91 /* Initialize *OPTS to be a copy of the user print options. */
93 get_user_print_options (struct value_print_options
*opts
)
95 *opts
= user_print_options
;
98 /* Initialize *OPTS to be a copy of the user print options, but with
99 pretty-printing disabled. */
101 get_raw_print_options (struct value_print_options
*opts
)
103 *opts
= user_print_options
;
104 opts
->pretty
= Val_no_prettyprint
;
107 /* Initialize *OPTS to be a copy of the user print options, but using
108 FORMAT as the formatting option. */
110 get_formatted_print_options (struct value_print_options
*opts
,
113 *opts
= user_print_options
;
114 opts
->format
= format
;
118 show_print_max (struct ui_file
*file
, int from_tty
,
119 struct cmd_list_element
*c
, const char *value
)
121 fprintf_filtered (file
,
122 _("Limit on string chars or array "
123 "elements to print is %s.\n"),
128 /* Default input and output radixes, and output format letter. */
130 unsigned input_radix
= 10;
132 show_input_radix (struct ui_file
*file
, int from_tty
,
133 struct cmd_list_element
*c
, const char *value
)
135 fprintf_filtered (file
,
136 _("Default input radix for entering numbers is %s.\n"),
140 unsigned output_radix
= 10;
142 show_output_radix (struct ui_file
*file
, int from_tty
,
143 struct cmd_list_element
*c
, const char *value
)
145 fprintf_filtered (file
,
146 _("Default output radix for printing of values is %s.\n"),
150 /* By default we print arrays without printing the index of each element in
151 the array. This behavior can be changed by setting PRINT_ARRAY_INDEXES. */
154 show_print_array_indexes (struct ui_file
*file
, int from_tty
,
155 struct cmd_list_element
*c
, const char *value
)
157 fprintf_filtered (file
, _("Printing of array indexes is %s.\n"), value
);
160 /* Print repeat counts if there are more than this many repetitions of an
161 element in an array. Referenced by the low level language dependent
165 show_repeat_count_threshold (struct ui_file
*file
, int from_tty
,
166 struct cmd_list_element
*c
, const char *value
)
168 fprintf_filtered (file
, _("Threshold for repeated print elements is %s.\n"),
172 /* If nonzero, stops printing of char arrays at first null. */
175 show_stop_print_at_null (struct ui_file
*file
, int from_tty
,
176 struct cmd_list_element
*c
, const char *value
)
178 fprintf_filtered (file
,
179 _("Printing of char arrays to stop "
180 "at first null char is %s.\n"),
184 /* Controls pretty printing of structures. */
187 show_prettyprint_structs (struct ui_file
*file
, int from_tty
,
188 struct cmd_list_element
*c
, const char *value
)
190 fprintf_filtered (file
, _("Prettyprinting of structures is %s.\n"), value
);
193 /* Controls pretty printing of arrays. */
196 show_prettyprint_arrays (struct ui_file
*file
, int from_tty
,
197 struct cmd_list_element
*c
, const char *value
)
199 fprintf_filtered (file
, _("Prettyprinting of arrays is %s.\n"), value
);
202 /* If nonzero, causes unions inside structures or other unions to be
206 show_unionprint (struct ui_file
*file
, int from_tty
,
207 struct cmd_list_element
*c
, const char *value
)
209 fprintf_filtered (file
,
210 _("Printing of unions interior to structures is %s.\n"),
214 /* If nonzero, causes machine addresses to be printed in certain contexts. */
217 show_addressprint (struct ui_file
*file
, int from_tty
,
218 struct cmd_list_element
*c
, const char *value
)
220 fprintf_filtered (file
, _("Printing of addresses is %s.\n"), value
);
224 /* A helper function for val_print. When printing in "summary" mode,
225 we want to print scalar arguments, but not aggregate arguments.
226 This function distinguishes between the two. */
229 scalar_type_p (struct type
*type
)
231 CHECK_TYPEDEF (type
);
232 while (TYPE_CODE (type
) == TYPE_CODE_REF
)
234 type
= TYPE_TARGET_TYPE (type
);
235 CHECK_TYPEDEF (type
);
237 switch (TYPE_CODE (type
))
239 case TYPE_CODE_ARRAY
:
240 case TYPE_CODE_STRUCT
:
241 case TYPE_CODE_UNION
:
243 case TYPE_CODE_STRING
:
244 case TYPE_CODE_BITSTRING
:
251 /* Helper function to check the validity of some bits of a value.
253 If TYPE represents some aggregate type (e.g., a structure), return 1.
255 Otherwise, any of the bytes starting at OFFSET and extending for
256 TYPE_LENGTH(TYPE) bytes are invalid, print a message to STREAM and
257 return 0. The checking is done using FUNCS.
259 Otherwise, return 1. */
262 valprint_check_validity (struct ui_file
*stream
,
265 const struct value
*val
)
267 CHECK_TYPEDEF (type
);
269 if (TYPE_CODE (type
) != TYPE_CODE_UNION
270 && TYPE_CODE (type
) != TYPE_CODE_STRUCT
271 && TYPE_CODE (type
) != TYPE_CODE_ARRAY
)
273 if (!value_bits_valid (val
, TARGET_CHAR_BIT
* embedded_offset
,
274 TARGET_CHAR_BIT
* TYPE_LENGTH (type
)))
276 val_print_optimized_out (stream
);
280 if (value_bits_synthetic_pointer (val
, TARGET_CHAR_BIT
* embedded_offset
,
281 TARGET_CHAR_BIT
* TYPE_LENGTH (type
)))
283 fputs_filtered (_("<synthetic pointer>"), stream
);
287 if (!value_bytes_available (val
, embedded_offset
, TYPE_LENGTH (type
)))
289 val_print_unavailable (stream
);
298 val_print_optimized_out (struct ui_file
*stream
)
300 fprintf_filtered (stream
, _("<optimized out>"));
304 val_print_unavailable (struct ui_file
*stream
)
306 fprintf_filtered (stream
, _("<unavailable>"));
310 val_print_invalid_address (struct ui_file
*stream
)
312 fprintf_filtered (stream
, _("<invalid address>"));
315 /* Print using the given LANGUAGE the data of type TYPE located at
316 VALADDR + EMBEDDED_OFFSET (within GDB), which came from the
317 inferior at address ADDRESS + EMBEDDED_OFFSET, onto stdio stream
318 STREAM according to OPTIONS. VAL is the whole object that came
319 from ADDRESS. VALADDR must point to the head of VAL's contents
322 The language printers will pass down an adjusted EMBEDDED_OFFSET to
323 further helper subroutines as subfields of TYPE are printed. In
324 such cases, VALADDR is passed down unadjusted, as well as VAL, so
325 that VAL can be queried for metadata about the contents data being
326 printed, using EMBEDDED_OFFSET as an offset into VAL's contents
327 buffer. For example: "has this field been optimized out", or "I'm
328 printing an object while inspecting a traceframe; has this
329 particular piece of data been collected?".
331 RECURSE indicates the amount of indentation to supply before
332 continuation lines; this amount is roughly twice the value of
335 If the data is printed as a string, returns the number of string
336 characters printed. */
339 val_print (struct type
*type
, const gdb_byte
*valaddr
, int embedded_offset
,
340 CORE_ADDR address
, struct ui_file
*stream
, int recurse
,
341 const struct value
*val
,
342 const struct value_print_options
*options
,
343 const struct language_defn
*language
)
345 volatile struct gdb_exception except
;
347 struct value_print_options local_opts
= *options
;
348 struct type
*real_type
= check_typedef (type
);
350 if (local_opts
.pretty
== Val_pretty_default
)
351 local_opts
.pretty
= (local_opts
.prettyprint_structs
352 ? Val_prettyprint
: Val_no_prettyprint
);
356 /* Ensure that the type is complete and not just a stub. If the type is
357 only a stub and we can't find and substitute its complete type, then
358 print appropriate string and return. */
360 if (TYPE_STUB (real_type
))
362 fprintf_filtered (stream
, _("<incomplete type>"));
367 if (!valprint_check_validity (stream
, real_type
, embedded_offset
, val
))
372 ret
= apply_val_pretty_printer (type
, valaddr
, embedded_offset
,
373 address
, stream
, recurse
,
374 val
, options
, language
);
379 /* Handle summary mode. If the value is a scalar, print it;
380 otherwise, print an ellipsis. */
381 if (options
->summary
&& !scalar_type_p (type
))
383 fprintf_filtered (stream
, "...");
387 TRY_CATCH (except
, RETURN_MASK_ERROR
)
389 ret
= language
->la_val_print (type
, valaddr
, embedded_offset
, address
,
390 stream
, recurse
, val
,
393 if (except
.reason
< 0)
394 fprintf_filtered (stream
, _("<error reading variable>"));
399 /* Check whether the value VAL is printable. Return 1 if it is;
400 return 0 and print an appropriate error message to STREAM according to
401 OPTIONS if it is not. */
404 value_check_printable (struct value
*val
, struct ui_file
*stream
,
405 const struct value_print_options
*options
)
409 fprintf_filtered (stream
, _("<address of value unknown>"));
413 if (value_entirely_optimized_out (val
))
415 if (options
->summary
&& !scalar_type_p (value_type (val
)))
416 fprintf_filtered (stream
, "...");
418 val_print_optimized_out (stream
);
422 if (TYPE_CODE (value_type (val
)) == TYPE_CODE_INTERNAL_FUNCTION
)
424 fprintf_filtered (stream
, _("<internal function %s>"),
425 value_internal_function_name (val
));
432 /* Print using the given LANGUAGE the value VAL onto stream STREAM according
435 If the data are a string pointer, returns the number of string characters
438 This is a preferable interface to val_print, above, because it uses
439 GDB's value mechanism. */
442 common_val_print (struct value
*val
, struct ui_file
*stream
, int recurse
,
443 const struct value_print_options
*options
,
444 const struct language_defn
*language
)
446 if (!value_check_printable (val
, stream
, options
))
449 if (language
->la_language
== language_ada
)
450 /* The value might have a dynamic type, which would cause trouble
451 below when trying to extract the value contents (since the value
452 size is determined from the type size which is unknown). So
453 get a fixed representation of our value. */
454 val
= ada_to_fixed_value (val
);
456 return val_print (value_type (val
), value_contents_for_printing (val
),
457 value_embedded_offset (val
), value_address (val
),
459 val
, options
, language
);
462 /* Print on stream STREAM the value VAL according to OPTIONS. The value
463 is printed using the current_language syntax.
465 If the object printed is a string pointer, return the number of string
469 value_print (struct value
*val
, struct ui_file
*stream
,
470 const struct value_print_options
*options
)
472 if (!value_check_printable (val
, stream
, options
))
477 int r
= apply_val_pretty_printer (value_type (val
),
478 value_contents_for_printing (val
),
479 value_embedded_offset (val
),
482 val
, options
, current_language
);
488 return LA_VALUE_PRINT (val
, stream
, options
);
491 /* Called by various <lang>_val_print routines to print
492 TYPE_CODE_INT's. TYPE is the type. VALADDR is the address of the
493 value. STREAM is where to print the value. */
496 val_print_type_code_int (struct type
*type
, const gdb_byte
*valaddr
,
497 struct ui_file
*stream
)
499 enum bfd_endian byte_order
= gdbarch_byte_order (get_type_arch (type
));
501 if (TYPE_LENGTH (type
) > sizeof (LONGEST
))
505 if (TYPE_UNSIGNED (type
)
506 && extract_long_unsigned_integer (valaddr
, TYPE_LENGTH (type
),
509 print_longest (stream
, 'u', 0, val
);
513 /* Signed, or we couldn't turn an unsigned value into a
514 LONGEST. For signed values, one could assume two's
515 complement (a reasonable assumption, I think) and do
517 print_hex_chars (stream
, (unsigned char *) valaddr
,
518 TYPE_LENGTH (type
), byte_order
);
523 print_longest (stream
, TYPE_UNSIGNED (type
) ? 'u' : 'd', 0,
524 unpack_long (type
, valaddr
));
529 val_print_type_code_flags (struct type
*type
, const gdb_byte
*valaddr
,
530 struct ui_file
*stream
)
532 ULONGEST val
= unpack_long (type
, valaddr
);
533 int bitpos
, nfields
= TYPE_NFIELDS (type
);
535 fputs_filtered ("[ ", stream
);
536 for (bitpos
= 0; bitpos
< nfields
; bitpos
++)
538 if (TYPE_FIELD_BITPOS (type
, bitpos
) != -1
539 && (val
& ((ULONGEST
)1 << bitpos
)))
541 if (TYPE_FIELD_NAME (type
, bitpos
))
542 fprintf_filtered (stream
, "%s ", TYPE_FIELD_NAME (type
, bitpos
));
544 fprintf_filtered (stream
, "#%d ", bitpos
);
547 fputs_filtered ("]", stream
);
549 /* Print a scalar of data of type TYPE, pointed to in GDB by VALADDR,
550 according to OPTIONS and SIZE on STREAM. Format i is not supported
553 This is how the elements of an array or structure are printed
558 val_print_scalar_formatted (struct type
*type
,
559 const gdb_byte
*valaddr
, int embedded_offset
,
560 const struct value
*val
,
561 const struct value_print_options
*options
,
563 struct ui_file
*stream
)
565 gdb_assert (val
!= NULL
);
566 gdb_assert (valaddr
== value_contents_for_printing_const (val
));
568 /* If we get here with a string format, try again without it. Go
569 all the way back to the language printers, which may call us
571 if (options
->format
== 's')
573 struct value_print_options opts
= *options
;
576 val_print (type
, valaddr
, embedded_offset
, 0, stream
, 0, val
, &opts
,
581 /* A scalar object that does not have all bits available can't be
582 printed, because all bits contribute to its representation. */
583 if (!value_bits_valid (val
, TARGET_CHAR_BIT
* embedded_offset
,
584 TARGET_CHAR_BIT
* TYPE_LENGTH (type
)))
585 val_print_optimized_out (stream
);
586 else if (!value_bytes_available (val
, embedded_offset
, TYPE_LENGTH (type
)))
587 val_print_unavailable (stream
);
589 print_scalar_formatted (valaddr
+ embedded_offset
, type
,
590 options
, size
, stream
);
593 /* Print a number according to FORMAT which is one of d,u,x,o,b,h,w,g.
594 The raison d'etre of this function is to consolidate printing of
595 LONG_LONG's into this one function. The format chars b,h,w,g are
596 from print_scalar_formatted(). Numbers are printed using C
599 USE_C_FORMAT means to use C format in all cases. Without it,
600 'o' and 'x' format do not include the standard C radix prefix
603 Hilfinger/2004-09-09: USE_C_FORMAT was originally called USE_LOCAL
604 and was intended to request formating according to the current
605 language and would be used for most integers that GDB prints. The
606 exceptional cases were things like protocols where the format of
607 the integer is a protocol thing, not a user-visible thing). The
608 parameter remains to preserve the information of what things might
609 be printed with language-specific format, should we ever resurrect
613 print_longest (struct ui_file
*stream
, int format
, int use_c_format
,
621 val
= int_string (val_long
, 10, 1, 0, 1); break;
623 val
= int_string (val_long
, 10, 0, 0, 1); break;
625 val
= int_string (val_long
, 16, 0, 0, use_c_format
); break;
627 val
= int_string (val_long
, 16, 0, 2, 1); break;
629 val
= int_string (val_long
, 16, 0, 4, 1); break;
631 val
= int_string (val_long
, 16, 0, 8, 1); break;
633 val
= int_string (val_long
, 16, 0, 16, 1); break;
636 val
= int_string (val_long
, 8, 0, 0, use_c_format
); break;
638 internal_error (__FILE__
, __LINE__
,
639 _("failed internal consistency check"));
641 fputs_filtered (val
, stream
);
644 /* This used to be a macro, but I don't think it is called often enough
645 to merit such treatment. */
646 /* Convert a LONGEST to an int. This is used in contexts (e.g. number of
647 arguments to a function, number in a value history, register number, etc.)
648 where the value must not be larger than can fit in an int. */
651 longest_to_int (LONGEST arg
)
653 /* Let the compiler do the work. */
654 int rtnval
= (int) arg
;
656 /* Check for overflows or underflows. */
657 if (sizeof (LONGEST
) > sizeof (int))
661 error (_("Value out of range."));
667 /* Print a floating point value of type TYPE (not always a
668 TYPE_CODE_FLT), pointed to in GDB by VALADDR, on STREAM. */
671 print_floating (const gdb_byte
*valaddr
, struct type
*type
,
672 struct ui_file
*stream
)
676 const struct floatformat
*fmt
= NULL
;
677 unsigned len
= TYPE_LENGTH (type
);
678 enum float_kind kind
;
680 /* If it is a floating-point, check for obvious problems. */
681 if (TYPE_CODE (type
) == TYPE_CODE_FLT
)
682 fmt
= floatformat_from_type (type
);
685 kind
= floatformat_classify (fmt
, valaddr
);
686 if (kind
== float_nan
)
688 if (floatformat_is_negative (fmt
, valaddr
))
689 fprintf_filtered (stream
, "-");
690 fprintf_filtered (stream
, "nan(");
691 fputs_filtered ("0x", stream
);
692 fputs_filtered (floatformat_mantissa (fmt
, valaddr
), stream
);
693 fprintf_filtered (stream
, ")");
696 else if (kind
== float_infinite
)
698 if (floatformat_is_negative (fmt
, valaddr
))
699 fputs_filtered ("-", stream
);
700 fputs_filtered ("inf", stream
);
705 /* NOTE: cagney/2002-01-15: The TYPE passed into print_floating()
706 isn't necessarily a TYPE_CODE_FLT. Consequently, unpack_double
707 needs to be used as that takes care of any necessary type
708 conversions. Such conversions are of course direct to DOUBLEST
709 and disregard any possible target floating point limitations.
710 For instance, a u64 would be converted and displayed exactly on a
711 host with 80 bit DOUBLEST but with loss of information on a host
712 with 64 bit DOUBLEST. */
714 doub
= unpack_double (type
, valaddr
, &inv
);
717 fprintf_filtered (stream
, "<invalid float value>");
721 /* FIXME: kettenis/2001-01-20: The following code makes too much
722 assumptions about the host and target floating point format. */
724 /* NOTE: cagney/2002-02-03: Since the TYPE of what was passed in may
725 not necessarily be a TYPE_CODE_FLT, the below ignores that and
726 instead uses the type's length to determine the precision of the
727 floating-point value being printed. */
729 if (len
< sizeof (double))
730 fprintf_filtered (stream
, "%.9g", (double) doub
);
731 else if (len
== sizeof (double))
732 fprintf_filtered (stream
, "%.17g", (double) doub
);
734 #ifdef PRINTF_HAS_LONG_DOUBLE
735 fprintf_filtered (stream
, "%.35Lg", doub
);
737 /* This at least wins with values that are representable as
739 fprintf_filtered (stream
, "%.17g", (double) doub
);
744 print_decimal_floating (const gdb_byte
*valaddr
, struct type
*type
,
745 struct ui_file
*stream
)
747 enum bfd_endian byte_order
= gdbarch_byte_order (get_type_arch (type
));
748 char decstr
[MAX_DECIMAL_STRING
];
749 unsigned len
= TYPE_LENGTH (type
);
751 decimal_to_string (valaddr
, len
, byte_order
, decstr
);
752 fputs_filtered (decstr
, stream
);
757 print_binary_chars (struct ui_file
*stream
, const gdb_byte
*valaddr
,
758 unsigned len
, enum bfd_endian byte_order
)
761 #define BITS_IN_BYTES 8
767 /* Declared "int" so it will be signed.
768 This ensures that right shift will shift in zeros. */
770 const int mask
= 0x080;
772 /* FIXME: We should be not printing leading zeroes in most cases. */
774 if (byte_order
== BFD_ENDIAN_BIG
)
780 /* Every byte has 8 binary characters; peel off
781 and print from the MSB end. */
783 for (i
= 0; i
< (BITS_IN_BYTES
* sizeof (*p
)); i
++)
785 if (*p
& (mask
>> i
))
790 fprintf_filtered (stream
, "%1d", b
);
796 for (p
= valaddr
+ len
- 1;
800 for (i
= 0; i
< (BITS_IN_BYTES
* sizeof (*p
)); i
++)
802 if (*p
& (mask
>> i
))
807 fprintf_filtered (stream
, "%1d", b
);
813 /* VALADDR points to an integer of LEN bytes.
814 Print it in octal on stream or format it in buf. */
817 print_octal_chars (struct ui_file
*stream
, const gdb_byte
*valaddr
,
818 unsigned len
, enum bfd_endian byte_order
)
821 unsigned char octa1
, octa2
, octa3
, carry
;
824 /* FIXME: We should be not printing leading zeroes in most cases. */
827 /* Octal is 3 bits, which doesn't fit. Yuk. So we have to track
828 * the extra bits, which cycle every three bytes:
832 * bit number 123 456 78 | 9 012 345 6 | 78 901 234 | 567 890 12 |
834 * Octal side: 0 1 carry 3 4 carry ...
836 * Cycle number: 0 1 2
838 * But of course we are printing from the high side, so we have to
839 * figure out where in the cycle we are so that we end up with no
840 * left over bits at the end.
842 #define BITS_IN_OCTAL 3
843 #define HIGH_ZERO 0340
844 #define LOW_ZERO 0016
845 #define CARRY_ZERO 0003
846 #define HIGH_ONE 0200
849 #define CARRY_ONE 0001
850 #define HIGH_TWO 0300
854 /* For 32 we start in cycle 2, with two bits and one bit carry;
855 for 64 in cycle in cycle 1, with one bit and a two bit carry. */
857 cycle
= (len
* BITS_IN_BYTES
) % BITS_IN_OCTAL
;
860 fputs_filtered ("0", stream
);
861 if (byte_order
== BFD_ENDIAN_BIG
)
870 /* No carry in, carry out two bits. */
872 octa1
= (HIGH_ZERO
& *p
) >> 5;
873 octa2
= (LOW_ZERO
& *p
) >> 2;
874 carry
= (CARRY_ZERO
& *p
);
875 fprintf_filtered (stream
, "%o", octa1
);
876 fprintf_filtered (stream
, "%o", octa2
);
880 /* Carry in two bits, carry out one bit. */
882 octa1
= (carry
<< 1) | ((HIGH_ONE
& *p
) >> 7);
883 octa2
= (MID_ONE
& *p
) >> 4;
884 octa3
= (LOW_ONE
& *p
) >> 1;
885 carry
= (CARRY_ONE
& *p
);
886 fprintf_filtered (stream
, "%o", octa1
);
887 fprintf_filtered (stream
, "%o", octa2
);
888 fprintf_filtered (stream
, "%o", octa3
);
892 /* Carry in one bit, no carry out. */
894 octa1
= (carry
<< 2) | ((HIGH_TWO
& *p
) >> 6);
895 octa2
= (MID_TWO
& *p
) >> 3;
896 octa3
= (LOW_TWO
& *p
);
898 fprintf_filtered (stream
, "%o", octa1
);
899 fprintf_filtered (stream
, "%o", octa2
);
900 fprintf_filtered (stream
, "%o", octa3
);
904 error (_("Internal error in octal conversion;"));
908 cycle
= cycle
% BITS_IN_OCTAL
;
913 for (p
= valaddr
+ len
- 1;
920 /* Carry out, no carry in */
922 octa1
= (HIGH_ZERO
& *p
) >> 5;
923 octa2
= (LOW_ZERO
& *p
) >> 2;
924 carry
= (CARRY_ZERO
& *p
);
925 fprintf_filtered (stream
, "%o", octa1
);
926 fprintf_filtered (stream
, "%o", octa2
);
930 /* Carry in, carry out */
932 octa1
= (carry
<< 1) | ((HIGH_ONE
& *p
) >> 7);
933 octa2
= (MID_ONE
& *p
) >> 4;
934 octa3
= (LOW_ONE
& *p
) >> 1;
935 carry
= (CARRY_ONE
& *p
);
936 fprintf_filtered (stream
, "%o", octa1
);
937 fprintf_filtered (stream
, "%o", octa2
);
938 fprintf_filtered (stream
, "%o", octa3
);
942 /* Carry in, no carry out */
944 octa1
= (carry
<< 2) | ((HIGH_TWO
& *p
) >> 6);
945 octa2
= (MID_TWO
& *p
) >> 3;
946 octa3
= (LOW_TWO
& *p
);
948 fprintf_filtered (stream
, "%o", octa1
);
949 fprintf_filtered (stream
, "%o", octa2
);
950 fprintf_filtered (stream
, "%o", octa3
);
954 error (_("Internal error in octal conversion;"));
958 cycle
= cycle
% BITS_IN_OCTAL
;
964 /* VALADDR points to an integer of LEN bytes.
965 Print it in decimal on stream or format it in buf. */
968 print_decimal_chars (struct ui_file
*stream
, const gdb_byte
*valaddr
,
969 unsigned len
, enum bfd_endian byte_order
)
972 #define CARRY_OUT( x ) ((x) / TEN) /* extend char to int */
973 #define CARRY_LEFT( x ) ((x) % TEN)
974 #define SHIFT( x ) ((x) << 4)
975 #define LOW_NIBBLE( x ) ( (x) & 0x00F)
976 #define HIGH_NIBBLE( x ) (((x) & 0x0F0) >> 4)
979 unsigned char *digits
;
982 int i
, j
, decimal_digits
;
986 /* Base-ten number is less than twice as many digits
987 as the base 16 number, which is 2 digits per byte. */
989 decimal_len
= len
* 2 * 2;
990 digits
= xmalloc (decimal_len
);
992 for (i
= 0; i
< decimal_len
; i
++)
997 /* Ok, we have an unknown number of bytes of data to be printed in
1000 * Given a hex number (in nibbles) as XYZ, we start by taking X and
1001 * decemalizing it as "x1 x2" in two decimal nibbles. Then we multiply
1002 * the nibbles by 16, add Y and re-decimalize. Repeat with Z.
1004 * The trick is that "digits" holds a base-10 number, but sometimes
1005 * the individual digits are > 10.
1007 * Outer loop is per nibble (hex digit) of input, from MSD end to
1010 decimal_digits
= 0; /* Number of decimal digits so far */
1011 p
= (byte_order
== BFD_ENDIAN_BIG
) ? valaddr
: valaddr
+ len
- 1;
1013 while ((byte_order
== BFD_ENDIAN_BIG
) ? (p
< valaddr
+ len
) : (p
>= valaddr
))
1016 * Multiply current base-ten number by 16 in place.
1017 * Each digit was between 0 and 9, now is between
1020 for (j
= 0; j
< decimal_digits
; j
++)
1022 digits
[j
] = SHIFT (digits
[j
]);
1025 /* Take the next nibble off the input and add it to what
1026 * we've got in the LSB position. Bottom 'digit' is now
1027 * between 0 and 159.
1029 * "flip" is used to run this loop twice for each byte.
1033 /* Take top nibble. */
1035 digits
[0] += HIGH_NIBBLE (*p
);
1040 /* Take low nibble and bump our pointer "p". */
1042 digits
[0] += LOW_NIBBLE (*p
);
1043 if (byte_order
== BFD_ENDIAN_BIG
)
1050 /* Re-decimalize. We have to do this often enough
1051 * that we don't overflow, but once per nibble is
1052 * overkill. Easier this way, though. Note that the
1053 * carry is often larger than 10 (e.g. max initial
1054 * carry out of lowest nibble is 15, could bubble all
1055 * the way up greater than 10). So we have to do
1056 * the carrying beyond the last current digit.
1059 for (j
= 0; j
< decimal_len
- 1; j
++)
1063 /* "/" won't handle an unsigned char with
1064 * a value that if signed would be negative.
1065 * So extend to longword int via "dummy".
1068 carry
= CARRY_OUT (dummy
);
1069 digits
[j
] = CARRY_LEFT (dummy
);
1071 if (j
>= decimal_digits
&& carry
== 0)
1074 * All higher digits are 0 and we
1075 * no longer have a carry.
1077 * Note: "j" is 0-based, "decimal_digits" is
1080 decimal_digits
= j
+ 1;
1086 /* Ok, now "digits" is the decimal representation, with
1087 the "decimal_digits" actual digits. Print! */
1089 for (i
= decimal_digits
- 1; i
>= 0; i
--)
1091 fprintf_filtered (stream
, "%1d", digits
[i
]);
1096 /* VALADDR points to an integer of LEN bytes. Print it in hex on stream. */
1099 print_hex_chars (struct ui_file
*stream
, const gdb_byte
*valaddr
,
1100 unsigned len
, enum bfd_endian byte_order
)
1104 /* FIXME: We should be not printing leading zeroes in most cases. */
1106 fputs_filtered ("0x", stream
);
1107 if (byte_order
== BFD_ENDIAN_BIG
)
1113 fprintf_filtered (stream
, "%02x", *p
);
1118 for (p
= valaddr
+ len
- 1;
1122 fprintf_filtered (stream
, "%02x", *p
);
1127 /* VALADDR points to a char integer of LEN bytes.
1128 Print it out in appropriate language form on stream.
1129 Omit any leading zero chars. */
1132 print_char_chars (struct ui_file
*stream
, struct type
*type
,
1133 const gdb_byte
*valaddr
,
1134 unsigned len
, enum bfd_endian byte_order
)
1138 if (byte_order
== BFD_ENDIAN_BIG
)
1141 while (p
< valaddr
+ len
- 1 && *p
== 0)
1144 while (p
< valaddr
+ len
)
1146 LA_EMIT_CHAR (*p
, type
, stream
, '\'');
1152 p
= valaddr
+ len
- 1;
1153 while (p
> valaddr
&& *p
== 0)
1156 while (p
>= valaddr
)
1158 LA_EMIT_CHAR (*p
, type
, stream
, '\'');
1164 /* Print on STREAM using the given OPTIONS the index for the element
1165 at INDEX of an array whose index type is INDEX_TYPE. */
1168 maybe_print_array_index (struct type
*index_type
, LONGEST index
,
1169 struct ui_file
*stream
,
1170 const struct value_print_options
*options
)
1172 struct value
*index_value
;
1174 if (!options
->print_array_indexes
)
1177 index_value
= value_from_longest (index_type
, index
);
1179 LA_PRINT_ARRAY_INDEX (index_value
, stream
, options
);
1182 /* Called by various <lang>_val_print routines to print elements of an
1183 array in the form "<elem1>, <elem2>, <elem3>, ...".
1185 (FIXME?) Assumes array element separator is a comma, which is correct
1186 for all languages currently handled.
1187 (FIXME?) Some languages have a notation for repeated array elements,
1188 perhaps we should try to use that notation when appropriate. */
1191 val_print_array_elements (struct type
*type
,
1192 const gdb_byte
*valaddr
, int embedded_offset
,
1193 CORE_ADDR address
, struct ui_file
*stream
,
1195 const struct value
*val
,
1196 const struct value_print_options
*options
,
1199 unsigned int things_printed
= 0;
1201 struct type
*elttype
, *index_type
;
1203 /* Position of the array element we are examining to see
1204 whether it is repeated. */
1206 /* Number of repetitions we have detected so far. */
1208 LONGEST low_bound
, high_bound
;
1210 elttype
= TYPE_TARGET_TYPE (type
);
1211 eltlen
= TYPE_LENGTH (check_typedef (elttype
));
1212 index_type
= TYPE_INDEX_TYPE (type
);
1214 if (get_array_bounds (type
, &low_bound
, &high_bound
))
1216 /* The array length should normally be HIGH_BOUND - LOW_BOUND + 1.
1217 But we have to be a little extra careful, because some languages
1218 such as Ada allow LOW_BOUND to be greater than HIGH_BOUND for
1219 empty arrays. In that situation, the array length is just zero,
1221 if (low_bound
> high_bound
)
1224 len
= high_bound
- low_bound
+ 1;
1228 warning (_("unable to get bounds of array, assuming null array"));
1233 annotate_array_section_begin (i
, elttype
);
1235 for (; i
< len
&& things_printed
< options
->print_max
; i
++)
1239 if (options
->prettyprint_arrays
)
1241 fprintf_filtered (stream
, ",\n");
1242 print_spaces_filtered (2 + 2 * recurse
, stream
);
1246 fprintf_filtered (stream
, ", ");
1249 wrap_here (n_spaces (2 + 2 * recurse
));
1250 maybe_print_array_index (index_type
, i
+ low_bound
,
1255 /* Only check for reps if repeat_count_threshold is not set to
1256 UINT_MAX (unlimited). */
1257 if (options
->repeat_count_threshold
< UINT_MAX
)
1260 && value_available_contents_eq (val
,
1261 embedded_offset
+ i
* eltlen
,
1272 if (reps
> options
->repeat_count_threshold
)
1274 val_print (elttype
, valaddr
, embedded_offset
+ i
* eltlen
,
1275 address
, stream
, recurse
+ 1, val
, options
,
1277 annotate_elt_rep (reps
);
1278 fprintf_filtered (stream
, " <repeats %u times>", reps
);
1279 annotate_elt_rep_end ();
1282 things_printed
+= options
->repeat_count_threshold
;
1286 val_print (elttype
, valaddr
, embedded_offset
+ i
* eltlen
,
1288 stream
, recurse
+ 1, val
, options
, current_language
);
1293 annotate_array_section_end ();
1296 fprintf_filtered (stream
, "...");
1300 /* Read LEN bytes of target memory at address MEMADDR, placing the
1301 results in GDB's memory at MYADDR. Returns a count of the bytes
1302 actually read, and optionally an errno value in the location
1303 pointed to by ERRNOPTR if ERRNOPTR is non-null. */
1305 /* FIXME: cagney/1999-10-14: Only used by val_print_string. Can this
1306 function be eliminated. */
1309 partial_memory_read (CORE_ADDR memaddr
, gdb_byte
*myaddr
,
1310 int len
, int *errnoptr
)
1312 int nread
; /* Number of bytes actually read. */
1313 int errcode
; /* Error from last read. */
1315 /* First try a complete read. */
1316 errcode
= target_read_memory (memaddr
, myaddr
, len
);
1324 /* Loop, reading one byte at a time until we get as much as we can. */
1325 for (errcode
= 0, nread
= 0; len
> 0 && errcode
== 0; nread
++, len
--)
1327 errcode
= target_read_memory (memaddr
++, myaddr
++, 1);
1329 /* If an error, the last read was unsuccessful, so adjust count. */
1335 if (errnoptr
!= NULL
)
1337 *errnoptr
= errcode
;
1342 /* Read a string from the inferior, at ADDR, with LEN characters of WIDTH bytes
1343 each. Fetch at most FETCHLIMIT characters. BUFFER will be set to a newly
1344 allocated buffer containing the string, which the caller is responsible to
1345 free, and BYTES_READ will be set to the number of bytes read. Returns 0 on
1346 success, or errno on failure.
1348 If LEN > 0, reads exactly LEN characters (including eventual NULs in
1349 the middle or end of the string). If LEN is -1, stops at the first
1350 null character (not necessarily the first null byte) up to a maximum
1351 of FETCHLIMIT characters. Set FETCHLIMIT to UINT_MAX to read as many
1352 characters as possible from the string.
1354 Unless an exception is thrown, BUFFER will always be allocated, even on
1355 failure. In this case, some characters might have been read before the
1356 failure happened. Check BYTES_READ to recognize this situation.
1358 Note: There was a FIXME asking to make this code use target_read_string,
1359 but this function is more general (can read past null characters, up to
1360 given LEN). Besides, it is used much more often than target_read_string
1361 so it is more tested. Perhaps callers of target_read_string should use
1362 this function instead? */
1365 read_string (CORE_ADDR addr
, int len
, int width
, unsigned int fetchlimit
,
1366 enum bfd_endian byte_order
, gdb_byte
**buffer
, int *bytes_read
)
1368 int found_nul
; /* Non-zero if we found the nul char. */
1369 int errcode
; /* Errno returned from bad reads. */
1370 unsigned int nfetch
; /* Chars to fetch / chars fetched. */
1371 unsigned int chunksize
; /* Size of each fetch, in chars. */
1372 gdb_byte
*bufptr
; /* Pointer to next available byte in
1374 gdb_byte
*limit
; /* First location past end of fetch buffer. */
1375 struct cleanup
*old_chain
= NULL
; /* Top of the old cleanup chain. */
1377 /* Decide how large of chunks to try to read in one operation. This
1378 is also pretty simple. If LEN >= zero, then we want fetchlimit chars,
1379 so we might as well read them all in one operation. If LEN is -1, we
1380 are looking for a NUL terminator to end the fetching, so we might as
1381 well read in blocks that are large enough to be efficient, but not so
1382 large as to be slow if fetchlimit happens to be large. So we choose the
1383 minimum of 8 and fetchlimit. We used to use 200 instead of 8 but
1384 200 is way too big for remote debugging over a serial line. */
1386 chunksize
= (len
== -1 ? min (8, fetchlimit
) : fetchlimit
);
1388 /* Loop until we either have all the characters, or we encounter
1389 some error, such as bumping into the end of the address space. */
1394 old_chain
= make_cleanup (free_current_contents
, buffer
);
1398 *buffer
= (gdb_byte
*) xmalloc (len
* width
);
1401 nfetch
= partial_memory_read (addr
, bufptr
, len
* width
, &errcode
)
1403 addr
+= nfetch
* width
;
1404 bufptr
+= nfetch
* width
;
1408 unsigned long bufsize
= 0;
1413 nfetch
= min (chunksize
, fetchlimit
- bufsize
);
1415 if (*buffer
== NULL
)
1416 *buffer
= (gdb_byte
*) xmalloc (nfetch
* width
);
1418 *buffer
= (gdb_byte
*) xrealloc (*buffer
,
1419 (nfetch
+ bufsize
) * width
);
1421 bufptr
= *buffer
+ bufsize
* width
;
1424 /* Read as much as we can. */
1425 nfetch
= partial_memory_read (addr
, bufptr
, nfetch
* width
, &errcode
)
1428 /* Scan this chunk for the null character that terminates the string
1429 to print. If found, we don't need to fetch any more. Note
1430 that bufptr is explicitly left pointing at the next character
1431 after the null character, or at the next character after the end
1434 limit
= bufptr
+ nfetch
* width
;
1435 while (bufptr
< limit
)
1439 c
= extract_unsigned_integer (bufptr
, width
, byte_order
);
1444 /* We don't care about any error which happened after
1445 the NUL terminator. */
1452 while (errcode
== 0 /* no error */
1453 && bufptr
- *buffer
< fetchlimit
* width
/* no overrun */
1454 && !found_nul
); /* haven't found NUL yet */
1457 { /* Length of string is really 0! */
1458 /* We always allocate *buffer. */
1459 *buffer
= bufptr
= xmalloc (1);
1463 /* bufptr and addr now point immediately beyond the last byte which we
1464 consider part of the string (including a '\0' which ends the string). */
1465 *bytes_read
= bufptr
- *buffer
;
1469 discard_cleanups (old_chain
);
1474 /* Return true if print_wchar can display W without resorting to a
1475 numeric escape, false otherwise. */
1478 wchar_printable (gdb_wchar_t w
)
1480 return (gdb_iswprint (w
)
1481 || w
== LCST ('\a') || w
== LCST ('\b')
1482 || w
== LCST ('\f') || w
== LCST ('\n')
1483 || w
== LCST ('\r') || w
== LCST ('\t')
1484 || w
== LCST ('\v'));
1487 /* A helper function that converts the contents of STRING to wide
1488 characters and then appends them to OUTPUT. */
1491 append_string_as_wide (const char *string
,
1492 struct obstack
*output
)
1494 for (; *string
; ++string
)
1496 gdb_wchar_t w
= gdb_btowc (*string
);
1497 obstack_grow (output
, &w
, sizeof (gdb_wchar_t
));
1501 /* Print a wide character W to OUTPUT. ORIG is a pointer to the
1502 original (target) bytes representing the character, ORIG_LEN is the
1503 number of valid bytes. WIDTH is the number of bytes in a base
1504 characters of the type. OUTPUT is an obstack to which wide
1505 characters are emitted. QUOTER is a (narrow) character indicating
1506 the style of quotes surrounding the character to be printed.
1507 NEED_ESCAPE is an in/out flag which is used to track numeric
1508 escapes across calls. */
1511 print_wchar (gdb_wint_t w
, const gdb_byte
*orig
,
1512 int orig_len
, int width
,
1513 enum bfd_endian byte_order
,
1514 struct obstack
*output
,
1515 int quoter
, int *need_escapep
)
1517 int need_escape
= *need_escapep
;
1520 if (gdb_iswprint (w
) && (!need_escape
|| (!gdb_iswdigit (w
)
1522 && w
!= LCST ('9'))))
1524 gdb_wchar_t wchar
= w
;
1526 if (w
== gdb_btowc (quoter
) || w
== LCST ('\\'))
1527 obstack_grow_wstr (output
, LCST ("\\"));
1528 obstack_grow (output
, &wchar
, sizeof (gdb_wchar_t
));
1535 obstack_grow_wstr (output
, LCST ("\\a"));
1538 obstack_grow_wstr (output
, LCST ("\\b"));
1541 obstack_grow_wstr (output
, LCST ("\\f"));
1544 obstack_grow_wstr (output
, LCST ("\\n"));
1547 obstack_grow_wstr (output
, LCST ("\\r"));
1550 obstack_grow_wstr (output
, LCST ("\\t"));
1553 obstack_grow_wstr (output
, LCST ("\\v"));
1559 for (i
= 0; i
+ width
<= orig_len
; i
+= width
)
1564 value
= extract_unsigned_integer (&orig
[i
], width
,
1566 /* If the value fits in 3 octal digits, print it that
1567 way. Otherwise, print it as a hex escape. */
1569 sprintf (octal
, "\\%.3o", (int) (value
& 0777));
1571 sprintf (octal
, "\\x%lx", (long) value
);
1572 append_string_as_wide (octal
, output
);
1574 /* If we somehow have extra bytes, print them now. */
1575 while (i
< orig_len
)
1579 sprintf (octal
, "\\%.3o", orig
[i
] & 0xff);
1580 append_string_as_wide (octal
, output
);
1591 /* Print the character C on STREAM as part of the contents of a
1592 literal string whose delimiter is QUOTER. ENCODING names the
1596 generic_emit_char (int c
, struct type
*type
, struct ui_file
*stream
,
1597 int quoter
, const char *encoding
)
1599 enum bfd_endian byte_order
1600 = gdbarch_byte_order (get_type_arch (type
));
1601 struct obstack wchar_buf
, output
;
1602 struct cleanup
*cleanups
;
1604 struct wchar_iterator
*iter
;
1605 int need_escape
= 0;
1607 buf
= alloca (TYPE_LENGTH (type
));
1608 pack_long (buf
, type
, c
);
1610 iter
= make_wchar_iterator (buf
, TYPE_LENGTH (type
),
1611 encoding
, TYPE_LENGTH (type
));
1612 cleanups
= make_cleanup_wchar_iterator (iter
);
1614 /* This holds the printable form of the wchar_t data. */
1615 obstack_init (&wchar_buf
);
1616 make_cleanup_obstack_free (&wchar_buf
);
1622 const gdb_byte
*buf
;
1624 int print_escape
= 1;
1625 enum wchar_iterate_result result
;
1627 num_chars
= wchar_iterate (iter
, &result
, &chars
, &buf
, &buflen
);
1632 /* If all characters are printable, print them. Otherwise,
1633 we're going to have to print an escape sequence. We
1634 check all characters because we want to print the target
1635 bytes in the escape sequence, and we don't know character
1636 boundaries there. */
1640 for (i
= 0; i
< num_chars
; ++i
)
1641 if (!wchar_printable (chars
[i
]))
1649 for (i
= 0; i
< num_chars
; ++i
)
1650 print_wchar (chars
[i
], buf
, buflen
,
1651 TYPE_LENGTH (type
), byte_order
,
1652 &wchar_buf
, quoter
, &need_escape
);
1656 /* This handles the NUM_CHARS == 0 case as well. */
1658 print_wchar (gdb_WEOF
, buf
, buflen
, TYPE_LENGTH (type
),
1659 byte_order
, &wchar_buf
, quoter
, &need_escape
);
1662 /* The output in the host encoding. */
1663 obstack_init (&output
);
1664 make_cleanup_obstack_free (&output
);
1666 convert_between_encodings (INTERMEDIATE_ENCODING
, host_charset (),
1667 obstack_base (&wchar_buf
),
1668 obstack_object_size (&wchar_buf
),
1669 1, &output
, translit_char
);
1670 obstack_1grow (&output
, '\0');
1672 fputs_filtered (obstack_base (&output
), stream
);
1674 do_cleanups (cleanups
);
1677 /* Print the character string STRING, printing at most LENGTH
1678 characters. LENGTH is -1 if the string is nul terminated. TYPE is
1679 the type of each character. OPTIONS holds the printing options;
1680 printing stops early if the number hits print_max; repeat counts
1681 are printed as appropriate. Print ellipses at the end if we had to
1682 stop before printing LENGTH characters, or if FORCE_ELLIPSES.
1683 QUOTE_CHAR is the character to print at each end of the string. If
1684 C_STYLE_TERMINATOR is true, and the last character is 0, then it is
1688 generic_printstr (struct ui_file
*stream
, struct type
*type
,
1689 const gdb_byte
*string
, unsigned int length
,
1690 const char *encoding
, int force_ellipses
,
1691 int quote_char
, int c_style_terminator
,
1692 const struct value_print_options
*options
)
1694 enum bfd_endian byte_order
= gdbarch_byte_order (get_type_arch (type
));
1696 unsigned int things_printed
= 0;
1699 int width
= TYPE_LENGTH (type
);
1700 struct obstack wchar_buf
, output
;
1701 struct cleanup
*cleanup
;
1702 struct wchar_iterator
*iter
;
1704 int need_escape
= 0;
1705 gdb_wchar_t wide_quote_char
= gdb_btowc (quote_char
);
1709 unsigned long current_char
= 1;
1711 for (i
= 0; current_char
; ++i
)
1714 current_char
= extract_unsigned_integer (string
+ i
* width
,
1720 /* If the string was not truncated due to `set print elements', and
1721 the last byte of it is a null, we don't print that, in
1722 traditional C style. */
1723 if (c_style_terminator
1726 && (extract_unsigned_integer (string
+ (length
- 1) * width
,
1727 width
, byte_order
) == 0))
1732 fputs_filtered ("\"\"", stream
);
1736 /* Arrange to iterate over the characters, in wchar_t form. */
1737 iter
= make_wchar_iterator (string
, length
* width
, encoding
, width
);
1738 cleanup
= make_cleanup_wchar_iterator (iter
);
1740 /* WCHAR_BUF is the obstack we use to represent the string in
1742 obstack_init (&wchar_buf
);
1743 make_cleanup_obstack_free (&wchar_buf
);
1745 while (!finished
&& things_printed
< options
->print_max
)
1748 enum wchar_iterate_result result
;
1750 const gdb_byte
*buf
;
1757 obstack_grow_wstr (&wchar_buf
, LCST (", "));
1761 num_chars
= wchar_iterate (iter
, &result
, &chars
, &buf
, &buflen
);
1762 /* We only look at repetitions when we were able to convert a
1763 single character in isolation. This makes the code simpler
1764 and probably does the sensible thing in the majority of
1766 while (num_chars
== 1 && things_printed
< options
->print_max
)
1768 /* Count the number of repetitions. */
1769 unsigned int reps
= 0;
1770 gdb_wchar_t current_char
= chars
[0];
1771 const gdb_byte
*orig_buf
= buf
;
1772 int orig_len
= buflen
;
1776 obstack_grow_wstr (&wchar_buf
, LCST (", "));
1780 while (num_chars
== 1 && current_char
== chars
[0])
1782 num_chars
= wchar_iterate (iter
, &result
, &chars
,
1787 /* Emit CURRENT_CHAR according to the repetition count and
1789 if (reps
> options
->repeat_count_threshold
)
1793 if (options
->inspect_it
)
1794 obstack_grow_wstr (&wchar_buf
, LCST ("\\"));
1795 obstack_grow (&wchar_buf
, &wide_quote_char
,
1796 sizeof (gdb_wchar_t
));
1797 obstack_grow_wstr (&wchar_buf
, LCST (", "));
1800 obstack_grow_wstr (&wchar_buf
, LCST ("'"));
1802 print_wchar (current_char
, orig_buf
, orig_len
, width
,
1803 byte_order
, &wchar_buf
, '\'', &need_escape
);
1804 obstack_grow_wstr (&wchar_buf
, LCST ("'"));
1806 /* Painful gyrations. */
1808 char *s
= xstrprintf (_(" <repeats %u times>"), reps
);
1810 for (j
= 0; s
[j
]; ++j
)
1812 gdb_wchar_t w
= gdb_btowc (s
[j
]);
1813 obstack_grow (&wchar_buf
, &w
, sizeof (gdb_wchar_t
));
1817 things_printed
+= options
->repeat_count_threshold
;
1822 /* Saw the character one or more times, but fewer than
1823 the repetition threshold. */
1826 if (options
->inspect_it
)
1827 obstack_grow_wstr (&wchar_buf
, LCST ("\\"));
1828 obstack_grow (&wchar_buf
, &wide_quote_char
,
1829 sizeof (gdb_wchar_t
));
1836 print_wchar (current_char
, orig_buf
,
1838 byte_order
, &wchar_buf
,
1839 quote_char
, &need_escape
);
1845 /* NUM_CHARS and the other outputs from wchar_iterate are valid
1846 here regardless of which branch was taken above. */
1856 case wchar_iterate_invalid
:
1859 if (options
->inspect_it
)
1860 obstack_grow_wstr (&wchar_buf
, LCST ("\\"));
1861 obstack_grow (&wchar_buf
, &wide_quote_char
,
1862 sizeof (gdb_wchar_t
));
1866 print_wchar (gdb_WEOF
, buf
, buflen
, width
, byte_order
,
1867 &wchar_buf
, quote_char
, &need_escape
);
1870 case wchar_iterate_incomplete
:
1873 if (options
->inspect_it
)
1874 obstack_grow_wstr (&wchar_buf
, LCST ("\\"));
1875 obstack_grow (&wchar_buf
, &wide_quote_char
,
1876 sizeof (gdb_wchar_t
));
1877 obstack_grow_wstr (&wchar_buf
, LCST (","));
1880 obstack_grow_wstr (&wchar_buf
,
1881 LCST (" <incomplete sequence "));
1882 print_wchar (gdb_WEOF
, buf
, buflen
, width
,
1883 byte_order
, &wchar_buf
,
1885 obstack_grow_wstr (&wchar_buf
, LCST (">"));
1891 /* Terminate the quotes if necessary. */
1894 if (options
->inspect_it
)
1895 obstack_grow_wstr (&wchar_buf
, LCST ("\\"));
1896 obstack_grow (&wchar_buf
, &wide_quote_char
,
1897 sizeof (gdb_wchar_t
));
1900 if (force_ellipses
|| !finished
)
1901 obstack_grow_wstr (&wchar_buf
, LCST ("..."));
1903 /* OUTPUT is where we collect `char's for printing. */
1904 obstack_init (&output
);
1905 make_cleanup_obstack_free (&output
);
1907 convert_between_encodings (INTERMEDIATE_ENCODING
, host_charset (),
1908 obstack_base (&wchar_buf
),
1909 obstack_object_size (&wchar_buf
),
1910 1, &output
, translit_char
);
1911 obstack_1grow (&output
, '\0');
1913 fputs_filtered (obstack_base (&output
), stream
);
1915 do_cleanups (cleanup
);
1918 /* Print a string from the inferior, starting at ADDR and printing up to LEN
1919 characters, of WIDTH bytes a piece, to STREAM. If LEN is -1, printing
1920 stops at the first null byte, otherwise printing proceeds (including null
1921 bytes) until either print_max or LEN characters have been printed,
1922 whichever is smaller. ENCODING is the name of the string's
1923 encoding. It can be NULL, in which case the target encoding is
1927 val_print_string (struct type
*elttype
, const char *encoding
,
1928 CORE_ADDR addr
, int len
,
1929 struct ui_file
*stream
,
1930 const struct value_print_options
*options
)
1932 int force_ellipsis
= 0; /* Force ellipsis to be printed if nonzero. */
1933 int errcode
; /* Errno returned from bad reads. */
1934 int found_nul
; /* Non-zero if we found the nul char. */
1935 unsigned int fetchlimit
; /* Maximum number of chars to print. */
1937 gdb_byte
*buffer
= NULL
; /* Dynamically growable fetch buffer. */
1938 struct cleanup
*old_chain
= NULL
; /* Top of the old cleanup chain. */
1939 struct gdbarch
*gdbarch
= get_type_arch (elttype
);
1940 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
1941 int width
= TYPE_LENGTH (elttype
);
1943 /* First we need to figure out the limit on the number of characters we are
1944 going to attempt to fetch and print. This is actually pretty simple. If
1945 LEN >= zero, then the limit is the minimum of LEN and print_max. If
1946 LEN is -1, then the limit is print_max. This is true regardless of
1947 whether print_max is zero, UINT_MAX (unlimited), or something in between,
1948 because finding the null byte (or available memory) is what actually
1949 limits the fetch. */
1951 fetchlimit
= (len
== -1 ? options
->print_max
: min (len
,
1952 options
->print_max
));
1954 errcode
= read_string (addr
, len
, width
, fetchlimit
, byte_order
,
1955 &buffer
, &bytes_read
);
1956 old_chain
= make_cleanup (xfree
, buffer
);
1960 /* We now have either successfully filled the buffer to fetchlimit,
1961 or terminated early due to an error or finding a null char when
1964 /* Determine found_nul by looking at the last character read. */
1965 found_nul
= extract_unsigned_integer (buffer
+ bytes_read
- width
, width
,
1967 if (len
== -1 && !found_nul
)
1971 /* We didn't find a NUL terminator we were looking for. Attempt
1972 to peek at the next character. If not successful, or it is not
1973 a null byte, then force ellipsis to be printed. */
1975 peekbuf
= (gdb_byte
*) alloca (width
);
1977 if (target_read_memory (addr
, peekbuf
, width
) == 0
1978 && extract_unsigned_integer (peekbuf
, width
, byte_order
) != 0)
1981 else if ((len
>= 0 && errcode
!= 0) || (len
> bytes_read
/ width
))
1983 /* Getting an error when we have a requested length, or fetching less
1984 than the number of characters actually requested, always make us
1989 /* If we get an error before fetching anything, don't print a string.
1990 But if we fetch something and then get an error, print the string
1991 and then the error message. */
1992 if (errcode
== 0 || bytes_read
> 0)
1994 if (options
->addressprint
)
1996 fputs_filtered (" ", stream
);
1998 LA_PRINT_STRING (stream
, elttype
, buffer
, bytes_read
/ width
,
1999 encoding
, force_ellipsis
, options
);
2006 fprintf_filtered (stream
, " <Address ");
2007 fputs_filtered (paddress (gdbarch
, addr
), stream
);
2008 fprintf_filtered (stream
, " out of bounds>");
2012 fprintf_filtered (stream
, " <Error reading address ");
2013 fputs_filtered (paddress (gdbarch
, addr
), stream
);
2014 fprintf_filtered (stream
, ": %s>", safe_strerror (errcode
));
2019 do_cleanups (old_chain
);
2021 return (bytes_read
/ width
);
2025 /* The 'set input-radix' command writes to this auxiliary variable.
2026 If the requested radix is valid, INPUT_RADIX is updated; otherwise,
2027 it is left unchanged. */
2029 static unsigned input_radix_1
= 10;
2031 /* Validate an input or output radix setting, and make sure the user
2032 knows what they really did here. Radix setting is confusing, e.g.
2033 setting the input radix to "10" never changes it! */
2036 set_input_radix (char *args
, int from_tty
, struct cmd_list_element
*c
)
2038 set_input_radix_1 (from_tty
, input_radix_1
);
2042 set_input_radix_1 (int from_tty
, unsigned radix
)
2044 /* We don't currently disallow any input radix except 0 or 1, which don't
2045 make any mathematical sense. In theory, we can deal with any input
2046 radix greater than 1, even if we don't have unique digits for every
2047 value from 0 to radix-1, but in practice we lose on large radix values.
2048 We should either fix the lossage or restrict the radix range more.
2053 input_radix_1
= input_radix
;
2054 error (_("Nonsense input radix ``decimal %u''; input radix unchanged."),
2057 input_radix_1
= input_radix
= radix
;
2060 printf_filtered (_("Input radix now set to "
2061 "decimal %u, hex %x, octal %o.\n"),
2062 radix
, radix
, radix
);
2066 /* The 'set output-radix' command writes to this auxiliary variable.
2067 If the requested radix is valid, OUTPUT_RADIX is updated,
2068 otherwise, it is left unchanged. */
2070 static unsigned output_radix_1
= 10;
2073 set_output_radix (char *args
, int from_tty
, struct cmd_list_element
*c
)
2075 set_output_radix_1 (from_tty
, output_radix_1
);
2079 set_output_radix_1 (int from_tty
, unsigned radix
)
2081 /* Validate the radix and disallow ones that we aren't prepared to
2082 handle correctly, leaving the radix unchanged. */
2086 user_print_options
.output_format
= 'x'; /* hex */
2089 user_print_options
.output_format
= 0; /* decimal */
2092 user_print_options
.output_format
= 'o'; /* octal */
2095 output_radix_1
= output_radix
;
2096 error (_("Unsupported output radix ``decimal %u''; "
2097 "output radix unchanged."),
2100 output_radix_1
= output_radix
= radix
;
2103 printf_filtered (_("Output radix now set to "
2104 "decimal %u, hex %x, octal %o.\n"),
2105 radix
, radix
, radix
);
2109 /* Set both the input and output radix at once. Try to set the output radix
2110 first, since it has the most restrictive range. An radix that is valid as
2111 an output radix is also valid as an input radix.
2113 It may be useful to have an unusual input radix. If the user wishes to
2114 set an input radix that is not valid as an output radix, he needs to use
2115 the 'set input-radix' command. */
2118 set_radix (char *arg
, int from_tty
)
2122 radix
= (arg
== NULL
) ? 10 : parse_and_eval_long (arg
);
2123 set_output_radix_1 (0, radix
);
2124 set_input_radix_1 (0, radix
);
2127 printf_filtered (_("Input and output radices now set to "
2128 "decimal %u, hex %x, octal %o.\n"),
2129 radix
, radix
, radix
);
2133 /* Show both the input and output radices. */
2136 show_radix (char *arg
, int from_tty
)
2140 if (input_radix
== output_radix
)
2142 printf_filtered (_("Input and output radices set to "
2143 "decimal %u, hex %x, octal %o.\n"),
2144 input_radix
, input_radix
, input_radix
);
2148 printf_filtered (_("Input radix set to decimal "
2149 "%u, hex %x, octal %o.\n"),
2150 input_radix
, input_radix
, input_radix
);
2151 printf_filtered (_("Output radix set to decimal "
2152 "%u, hex %x, octal %o.\n"),
2153 output_radix
, output_radix
, output_radix
);
2160 set_print (char *arg
, int from_tty
)
2163 "\"set print\" must be followed by the name of a print subcommand.\n");
2164 help_list (setprintlist
, "set print ", -1, gdb_stdout
);
2168 show_print (char *args
, int from_tty
)
2170 cmd_show_list (showprintlist
, from_tty
, "");
2174 _initialize_valprint (void)
2176 add_prefix_cmd ("print", no_class
, set_print
,
2177 _("Generic command for setting how things print."),
2178 &setprintlist
, "set print ", 0, &setlist
);
2179 add_alias_cmd ("p", "print", no_class
, 1, &setlist
);
2180 /* Prefer set print to set prompt. */
2181 add_alias_cmd ("pr", "print", no_class
, 1, &setlist
);
2183 add_prefix_cmd ("print", no_class
, show_print
,
2184 _("Generic command for showing print settings."),
2185 &showprintlist
, "show print ", 0, &showlist
);
2186 add_alias_cmd ("p", "print", no_class
, 1, &showlist
);
2187 add_alias_cmd ("pr", "print", no_class
, 1, &showlist
);
2189 add_setshow_uinteger_cmd ("elements", no_class
,
2190 &user_print_options
.print_max
, _("\
2191 Set limit on string chars or array elements to print."), _("\
2192 Show limit on string chars or array elements to print."), _("\
2193 \"set print elements 0\" causes there to be no limit."),
2196 &setprintlist
, &showprintlist
);
2198 add_setshow_boolean_cmd ("null-stop", no_class
,
2199 &user_print_options
.stop_print_at_null
, _("\
2200 Set printing of char arrays to stop at first null char."), _("\
2201 Show printing of char arrays to stop at first null char."), NULL
,
2203 show_stop_print_at_null
,
2204 &setprintlist
, &showprintlist
);
2206 add_setshow_uinteger_cmd ("repeats", no_class
,
2207 &user_print_options
.repeat_count_threshold
, _("\
2208 Set threshold for repeated print elements."), _("\
2209 Show threshold for repeated print elements."), _("\
2210 \"set print repeats 0\" causes all elements to be individually printed."),
2212 show_repeat_count_threshold
,
2213 &setprintlist
, &showprintlist
);
2215 add_setshow_boolean_cmd ("pretty", class_support
,
2216 &user_print_options
.prettyprint_structs
, _("\
2217 Set prettyprinting of structures."), _("\
2218 Show prettyprinting of structures."), NULL
,
2220 show_prettyprint_structs
,
2221 &setprintlist
, &showprintlist
);
2223 add_setshow_boolean_cmd ("union", class_support
,
2224 &user_print_options
.unionprint
, _("\
2225 Set printing of unions interior to structures."), _("\
2226 Show printing of unions interior to structures."), NULL
,
2229 &setprintlist
, &showprintlist
);
2231 add_setshow_boolean_cmd ("array", class_support
,
2232 &user_print_options
.prettyprint_arrays
, _("\
2233 Set prettyprinting of arrays."), _("\
2234 Show prettyprinting of arrays."), NULL
,
2236 show_prettyprint_arrays
,
2237 &setprintlist
, &showprintlist
);
2239 add_setshow_boolean_cmd ("address", class_support
,
2240 &user_print_options
.addressprint
, _("\
2241 Set printing of addresses."), _("\
2242 Show printing of addresses."), NULL
,
2245 &setprintlist
, &showprintlist
);
2247 add_setshow_zuinteger_cmd ("input-radix", class_support
, &input_radix_1
,
2249 Set default input radix for entering numbers."), _("\
2250 Show default input radix for entering numbers."), NULL
,
2253 &setlist
, &showlist
);
2255 add_setshow_zuinteger_cmd ("output-radix", class_support
, &output_radix_1
,
2257 Set default output radix for printing of values."), _("\
2258 Show default output radix for printing of values."), NULL
,
2261 &setlist
, &showlist
);
2263 /* The "set radix" and "show radix" commands are special in that
2264 they are like normal set and show commands but allow two normally
2265 independent variables to be either set or shown with a single
2266 command. So the usual deprecated_add_set_cmd() and [deleted]
2267 add_show_from_set() commands aren't really appropriate. */
2268 /* FIXME: i18n: With the new add_setshow_integer command, that is no
2269 longer true - show can display anything. */
2270 add_cmd ("radix", class_support
, set_radix
, _("\
2271 Set default input and output number radices.\n\
2272 Use 'set input-radix' or 'set output-radix' to independently set each.\n\
2273 Without an argument, sets both radices back to the default value of 10."),
2275 add_cmd ("radix", class_support
, show_radix
, _("\
2276 Show the default input and output number radices.\n\
2277 Use 'show input-radix' or 'show output-radix' to independently show each."),
2280 add_setshow_boolean_cmd ("array-indexes", class_support
,
2281 &user_print_options
.print_array_indexes
, _("\
2282 Set printing of array indexes."), _("\
2283 Show printing of array indexes"), NULL
, NULL
, show_print_array_indexes
,
2284 &setprintlist
, &showprintlist
);