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
);
550 /* Print a scalar of data of type TYPE, pointed to in GDB by VALADDR,
551 according to OPTIONS and SIZE on STREAM. Format i is not supported
554 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 function pointer with inferior address ADDRESS onto stdio
1168 print_function_pointer_address (struct gdbarch
*gdbarch
,
1170 struct ui_file
*stream
,
1174 = gdbarch_convert_from_func_ptr_addr (gdbarch
, address
,
1177 /* If the function pointer is represented by a description, print
1178 the address of the description. */
1179 if (addressprint
&& func_addr
!= address
)
1181 fputs_filtered ("@", stream
);
1182 fputs_filtered (paddress (gdbarch
, address
), stream
);
1183 fputs_filtered (": ", stream
);
1185 print_address_demangle (gdbarch
, func_addr
, stream
, demangle
);
1189 /* Print on STREAM using the given OPTIONS the index for the element
1190 at INDEX of an array whose index type is INDEX_TYPE. */
1193 maybe_print_array_index (struct type
*index_type
, LONGEST index
,
1194 struct ui_file
*stream
,
1195 const struct value_print_options
*options
)
1197 struct value
*index_value
;
1199 if (!options
->print_array_indexes
)
1202 index_value
= value_from_longest (index_type
, index
);
1204 LA_PRINT_ARRAY_INDEX (index_value
, stream
, options
);
1207 /* Called by various <lang>_val_print routines to print elements of an
1208 array in the form "<elem1>, <elem2>, <elem3>, ...".
1210 (FIXME?) Assumes array element separator is a comma, which is correct
1211 for all languages currently handled.
1212 (FIXME?) Some languages have a notation for repeated array elements,
1213 perhaps we should try to use that notation when appropriate. */
1216 val_print_array_elements (struct type
*type
,
1217 const gdb_byte
*valaddr
, int embedded_offset
,
1218 CORE_ADDR address
, struct ui_file
*stream
,
1220 const struct value
*val
,
1221 const struct value_print_options
*options
,
1224 unsigned int things_printed
= 0;
1226 struct type
*elttype
, *index_type
;
1228 /* Position of the array element we are examining to see
1229 whether it is repeated. */
1231 /* Number of repetitions we have detected so far. */
1233 LONGEST low_bound
, high_bound
;
1235 elttype
= TYPE_TARGET_TYPE (type
);
1236 eltlen
= TYPE_LENGTH (check_typedef (elttype
));
1237 index_type
= TYPE_INDEX_TYPE (type
);
1239 if (get_array_bounds (type
, &low_bound
, &high_bound
))
1241 /* The array length should normally be HIGH_BOUND - LOW_BOUND + 1.
1242 But we have to be a little extra careful, because some languages
1243 such as Ada allow LOW_BOUND to be greater than HIGH_BOUND for
1244 empty arrays. In that situation, the array length is just zero,
1246 if (low_bound
> high_bound
)
1249 len
= high_bound
- low_bound
+ 1;
1253 warning (_("unable to get bounds of array, assuming null array"));
1258 annotate_array_section_begin (i
, elttype
);
1260 for (; i
< len
&& things_printed
< options
->print_max
; i
++)
1264 if (options
->prettyprint_arrays
)
1266 fprintf_filtered (stream
, ",\n");
1267 print_spaces_filtered (2 + 2 * recurse
, stream
);
1271 fprintf_filtered (stream
, ", ");
1274 wrap_here (n_spaces (2 + 2 * recurse
));
1275 maybe_print_array_index (index_type
, i
+ low_bound
,
1280 /* Only check for reps if repeat_count_threshold is not set to
1281 UINT_MAX (unlimited). */
1282 if (options
->repeat_count_threshold
< UINT_MAX
)
1285 && value_available_contents_eq (val
,
1286 embedded_offset
+ i
* eltlen
,
1297 if (reps
> options
->repeat_count_threshold
)
1299 val_print (elttype
, valaddr
, embedded_offset
+ i
* eltlen
,
1300 address
, stream
, recurse
+ 1, val
, options
,
1302 annotate_elt_rep (reps
);
1303 fprintf_filtered (stream
, " <repeats %u times>", reps
);
1304 annotate_elt_rep_end ();
1307 things_printed
+= options
->repeat_count_threshold
;
1311 val_print (elttype
, valaddr
, embedded_offset
+ i
* eltlen
,
1313 stream
, recurse
+ 1, val
, options
, current_language
);
1318 annotate_array_section_end ();
1321 fprintf_filtered (stream
, "...");
1325 /* Read LEN bytes of target memory at address MEMADDR, placing the
1326 results in GDB's memory at MYADDR. Returns a count of the bytes
1327 actually read, and optionally an errno value in the location
1328 pointed to by ERRNOPTR if ERRNOPTR is non-null. */
1330 /* FIXME: cagney/1999-10-14: Only used by val_print_string. Can this
1331 function be eliminated. */
1334 partial_memory_read (CORE_ADDR memaddr
, gdb_byte
*myaddr
,
1335 int len
, int *errnoptr
)
1337 int nread
; /* Number of bytes actually read. */
1338 int errcode
; /* Error from last read. */
1340 /* First try a complete read. */
1341 errcode
= target_read_memory (memaddr
, myaddr
, len
);
1349 /* Loop, reading one byte at a time until we get as much as we can. */
1350 for (errcode
= 0, nread
= 0; len
> 0 && errcode
== 0; nread
++, len
--)
1352 errcode
= target_read_memory (memaddr
++, myaddr
++, 1);
1354 /* If an error, the last read was unsuccessful, so adjust count. */
1360 if (errnoptr
!= NULL
)
1362 *errnoptr
= errcode
;
1367 /* Read a string from the inferior, at ADDR, with LEN characters of WIDTH bytes
1368 each. Fetch at most FETCHLIMIT characters. BUFFER will be set to a newly
1369 allocated buffer containing the string, which the caller is responsible to
1370 free, and BYTES_READ will be set to the number of bytes read. Returns 0 on
1371 success, or errno on failure.
1373 If LEN > 0, reads exactly LEN characters (including eventual NULs in
1374 the middle or end of the string). If LEN is -1, stops at the first
1375 null character (not necessarily the first null byte) up to a maximum
1376 of FETCHLIMIT characters. Set FETCHLIMIT to UINT_MAX to read as many
1377 characters as possible from the string.
1379 Unless an exception is thrown, BUFFER will always be allocated, even on
1380 failure. In this case, some characters might have been read before the
1381 failure happened. Check BYTES_READ to recognize this situation.
1383 Note: There was a FIXME asking to make this code use target_read_string,
1384 but this function is more general (can read past null characters, up to
1385 given LEN). Besides, it is used much more often than target_read_string
1386 so it is more tested. Perhaps callers of target_read_string should use
1387 this function instead? */
1390 read_string (CORE_ADDR addr
, int len
, int width
, unsigned int fetchlimit
,
1391 enum bfd_endian byte_order
, gdb_byte
**buffer
, int *bytes_read
)
1393 int found_nul
; /* Non-zero if we found the nul char. */
1394 int errcode
; /* Errno returned from bad reads. */
1395 unsigned int nfetch
; /* Chars to fetch / chars fetched. */
1396 unsigned int chunksize
; /* Size of each fetch, in chars. */
1397 gdb_byte
*bufptr
; /* Pointer to next available byte in
1399 gdb_byte
*limit
; /* First location past end of fetch buffer. */
1400 struct cleanup
*old_chain
= NULL
; /* Top of the old cleanup chain. */
1402 /* Decide how large of chunks to try to read in one operation. This
1403 is also pretty simple. If LEN >= zero, then we want fetchlimit chars,
1404 so we might as well read them all in one operation. If LEN is -1, we
1405 are looking for a NUL terminator to end the fetching, so we might as
1406 well read in blocks that are large enough to be efficient, but not so
1407 large as to be slow if fetchlimit happens to be large. So we choose the
1408 minimum of 8 and fetchlimit. We used to use 200 instead of 8 but
1409 200 is way too big for remote debugging over a serial line. */
1411 chunksize
= (len
== -1 ? min (8, fetchlimit
) : fetchlimit
);
1413 /* Loop until we either have all the characters, or we encounter
1414 some error, such as bumping into the end of the address space. */
1419 old_chain
= make_cleanup (free_current_contents
, buffer
);
1423 *buffer
= (gdb_byte
*) xmalloc (len
* width
);
1426 nfetch
= partial_memory_read (addr
, bufptr
, len
* width
, &errcode
)
1428 addr
+= nfetch
* width
;
1429 bufptr
+= nfetch
* width
;
1433 unsigned long bufsize
= 0;
1438 nfetch
= min (chunksize
, fetchlimit
- bufsize
);
1440 if (*buffer
== NULL
)
1441 *buffer
= (gdb_byte
*) xmalloc (nfetch
* width
);
1443 *buffer
= (gdb_byte
*) xrealloc (*buffer
,
1444 (nfetch
+ bufsize
) * width
);
1446 bufptr
= *buffer
+ bufsize
* width
;
1449 /* Read as much as we can. */
1450 nfetch
= partial_memory_read (addr
, bufptr
, nfetch
* width
, &errcode
)
1453 /* Scan this chunk for the null character that terminates the string
1454 to print. If found, we don't need to fetch any more. Note
1455 that bufptr is explicitly left pointing at the next character
1456 after the null character, or at the next character after the end
1459 limit
= bufptr
+ nfetch
* width
;
1460 while (bufptr
< limit
)
1464 c
= extract_unsigned_integer (bufptr
, width
, byte_order
);
1469 /* We don't care about any error which happened after
1470 the NUL terminator. */
1477 while (errcode
== 0 /* no error */
1478 && bufptr
- *buffer
< fetchlimit
* width
/* no overrun */
1479 && !found_nul
); /* haven't found NUL yet */
1482 { /* Length of string is really 0! */
1483 /* We always allocate *buffer. */
1484 *buffer
= bufptr
= xmalloc (1);
1488 /* bufptr and addr now point immediately beyond the last byte which we
1489 consider part of the string (including a '\0' which ends the string). */
1490 *bytes_read
= bufptr
- *buffer
;
1494 discard_cleanups (old_chain
);
1499 /* Return true if print_wchar can display W without resorting to a
1500 numeric escape, false otherwise. */
1503 wchar_printable (gdb_wchar_t w
)
1505 return (gdb_iswprint (w
)
1506 || w
== LCST ('\a') || w
== LCST ('\b')
1507 || w
== LCST ('\f') || w
== LCST ('\n')
1508 || w
== LCST ('\r') || w
== LCST ('\t')
1509 || w
== LCST ('\v'));
1512 /* A helper function that converts the contents of STRING to wide
1513 characters and then appends them to OUTPUT. */
1516 append_string_as_wide (const char *string
,
1517 struct obstack
*output
)
1519 for (; *string
; ++string
)
1521 gdb_wchar_t w
= gdb_btowc (*string
);
1522 obstack_grow (output
, &w
, sizeof (gdb_wchar_t
));
1526 /* Print a wide character W to OUTPUT. ORIG is a pointer to the
1527 original (target) bytes representing the character, ORIG_LEN is the
1528 number of valid bytes. WIDTH is the number of bytes in a base
1529 characters of the type. OUTPUT is an obstack to which wide
1530 characters are emitted. QUOTER is a (narrow) character indicating
1531 the style of quotes surrounding the character to be printed.
1532 NEED_ESCAPE is an in/out flag which is used to track numeric
1533 escapes across calls. */
1536 print_wchar (gdb_wint_t w
, const gdb_byte
*orig
,
1537 int orig_len
, int width
,
1538 enum bfd_endian byte_order
,
1539 struct obstack
*output
,
1540 int quoter
, int *need_escapep
)
1542 int need_escape
= *need_escapep
;
1545 if (gdb_iswprint (w
) && (!need_escape
|| (!gdb_iswdigit (w
)
1547 && w
!= LCST ('9'))))
1549 gdb_wchar_t wchar
= w
;
1551 if (w
== gdb_btowc (quoter
) || w
== LCST ('\\'))
1552 obstack_grow_wstr (output
, LCST ("\\"));
1553 obstack_grow (output
, &wchar
, sizeof (gdb_wchar_t
));
1560 obstack_grow_wstr (output
, LCST ("\\a"));
1563 obstack_grow_wstr (output
, LCST ("\\b"));
1566 obstack_grow_wstr (output
, LCST ("\\f"));
1569 obstack_grow_wstr (output
, LCST ("\\n"));
1572 obstack_grow_wstr (output
, LCST ("\\r"));
1575 obstack_grow_wstr (output
, LCST ("\\t"));
1578 obstack_grow_wstr (output
, LCST ("\\v"));
1584 for (i
= 0; i
+ width
<= orig_len
; i
+= width
)
1589 value
= extract_unsigned_integer (&orig
[i
], width
,
1591 /* If the value fits in 3 octal digits, print it that
1592 way. Otherwise, print it as a hex escape. */
1594 sprintf (octal
, "\\%.3o", (int) (value
& 0777));
1596 sprintf (octal
, "\\x%lx", (long) value
);
1597 append_string_as_wide (octal
, output
);
1599 /* If we somehow have extra bytes, print them now. */
1600 while (i
< orig_len
)
1604 sprintf (octal
, "\\%.3o", orig
[i
] & 0xff);
1605 append_string_as_wide (octal
, output
);
1616 /* Print the character C on STREAM as part of the contents of a
1617 literal string whose delimiter is QUOTER. ENCODING names the
1621 generic_emit_char (int c
, struct type
*type
, struct ui_file
*stream
,
1622 int quoter
, const char *encoding
)
1624 enum bfd_endian byte_order
1625 = gdbarch_byte_order (get_type_arch (type
));
1626 struct obstack wchar_buf
, output
;
1627 struct cleanup
*cleanups
;
1629 struct wchar_iterator
*iter
;
1630 int need_escape
= 0;
1632 buf
= alloca (TYPE_LENGTH (type
));
1633 pack_long (buf
, type
, c
);
1635 iter
= make_wchar_iterator (buf
, TYPE_LENGTH (type
),
1636 encoding
, TYPE_LENGTH (type
));
1637 cleanups
= make_cleanup_wchar_iterator (iter
);
1639 /* This holds the printable form of the wchar_t data. */
1640 obstack_init (&wchar_buf
);
1641 make_cleanup_obstack_free (&wchar_buf
);
1647 const gdb_byte
*buf
;
1649 int print_escape
= 1;
1650 enum wchar_iterate_result result
;
1652 num_chars
= wchar_iterate (iter
, &result
, &chars
, &buf
, &buflen
);
1657 /* If all characters are printable, print them. Otherwise,
1658 we're going to have to print an escape sequence. We
1659 check all characters because we want to print the target
1660 bytes in the escape sequence, and we don't know character
1661 boundaries there. */
1665 for (i
= 0; i
< num_chars
; ++i
)
1666 if (!wchar_printable (chars
[i
]))
1674 for (i
= 0; i
< num_chars
; ++i
)
1675 print_wchar (chars
[i
], buf
, buflen
,
1676 TYPE_LENGTH (type
), byte_order
,
1677 &wchar_buf
, quoter
, &need_escape
);
1681 /* This handles the NUM_CHARS == 0 case as well. */
1683 print_wchar (gdb_WEOF
, buf
, buflen
, TYPE_LENGTH (type
),
1684 byte_order
, &wchar_buf
, quoter
, &need_escape
);
1687 /* The output in the host encoding. */
1688 obstack_init (&output
);
1689 make_cleanup_obstack_free (&output
);
1691 convert_between_encodings (INTERMEDIATE_ENCODING
, host_charset (),
1692 obstack_base (&wchar_buf
),
1693 obstack_object_size (&wchar_buf
),
1694 1, &output
, translit_char
);
1695 obstack_1grow (&output
, '\0');
1697 fputs_filtered (obstack_base (&output
), stream
);
1699 do_cleanups (cleanups
);
1702 /* Print the character string STRING, printing at most LENGTH
1703 characters. LENGTH is -1 if the string is nul terminated. TYPE is
1704 the type of each character. OPTIONS holds the printing options;
1705 printing stops early if the number hits print_max; repeat counts
1706 are printed as appropriate. Print ellipses at the end if we had to
1707 stop before printing LENGTH characters, or if FORCE_ELLIPSES.
1708 QUOTE_CHAR is the character to print at each end of the string. If
1709 C_STYLE_TERMINATOR is true, and the last character is 0, then it is
1713 generic_printstr (struct ui_file
*stream
, struct type
*type
,
1714 const gdb_byte
*string
, unsigned int length
,
1715 const char *encoding
, int force_ellipses
,
1716 int quote_char
, int c_style_terminator
,
1717 const struct value_print_options
*options
)
1719 enum bfd_endian byte_order
= gdbarch_byte_order (get_type_arch (type
));
1721 unsigned int things_printed
= 0;
1724 int width
= TYPE_LENGTH (type
);
1725 struct obstack wchar_buf
, output
;
1726 struct cleanup
*cleanup
;
1727 struct wchar_iterator
*iter
;
1729 int need_escape
= 0;
1730 gdb_wchar_t wide_quote_char
= gdb_btowc (quote_char
);
1734 unsigned long current_char
= 1;
1736 for (i
= 0; current_char
; ++i
)
1739 current_char
= extract_unsigned_integer (string
+ i
* width
,
1745 /* If the string was not truncated due to `set print elements', and
1746 the last byte of it is a null, we don't print that, in
1747 traditional C style. */
1748 if (c_style_terminator
1751 && (extract_unsigned_integer (string
+ (length
- 1) * width
,
1752 width
, byte_order
) == 0))
1757 fputs_filtered ("\"\"", stream
);
1761 /* Arrange to iterate over the characters, in wchar_t form. */
1762 iter
= make_wchar_iterator (string
, length
* width
, encoding
, width
);
1763 cleanup
= make_cleanup_wchar_iterator (iter
);
1765 /* WCHAR_BUF is the obstack we use to represent the string in
1767 obstack_init (&wchar_buf
);
1768 make_cleanup_obstack_free (&wchar_buf
);
1770 while (!finished
&& things_printed
< options
->print_max
)
1773 enum wchar_iterate_result result
;
1775 const gdb_byte
*buf
;
1782 obstack_grow_wstr (&wchar_buf
, LCST (", "));
1786 num_chars
= wchar_iterate (iter
, &result
, &chars
, &buf
, &buflen
);
1787 /* We only look at repetitions when we were able to convert a
1788 single character in isolation. This makes the code simpler
1789 and probably does the sensible thing in the majority of
1791 while (num_chars
== 1 && things_printed
< options
->print_max
)
1793 /* Count the number of repetitions. */
1794 unsigned int reps
= 0;
1795 gdb_wchar_t current_char
= chars
[0];
1796 const gdb_byte
*orig_buf
= buf
;
1797 int orig_len
= buflen
;
1801 obstack_grow_wstr (&wchar_buf
, LCST (", "));
1805 while (num_chars
== 1 && current_char
== chars
[0])
1807 num_chars
= wchar_iterate (iter
, &result
, &chars
,
1812 /* Emit CURRENT_CHAR according to the repetition count and
1814 if (reps
> options
->repeat_count_threshold
)
1818 if (options
->inspect_it
)
1819 obstack_grow_wstr (&wchar_buf
, LCST ("\\"));
1820 obstack_grow (&wchar_buf
, &wide_quote_char
,
1821 sizeof (gdb_wchar_t
));
1822 obstack_grow_wstr (&wchar_buf
, LCST (", "));
1825 obstack_grow_wstr (&wchar_buf
, LCST ("'"));
1827 print_wchar (current_char
, orig_buf
, orig_len
, width
,
1828 byte_order
, &wchar_buf
, '\'', &need_escape
);
1829 obstack_grow_wstr (&wchar_buf
, LCST ("'"));
1831 /* Painful gyrations. */
1833 char *s
= xstrprintf (_(" <repeats %u times>"), reps
);
1835 for (j
= 0; s
[j
]; ++j
)
1837 gdb_wchar_t w
= gdb_btowc (s
[j
]);
1838 obstack_grow (&wchar_buf
, &w
, sizeof (gdb_wchar_t
));
1842 things_printed
+= options
->repeat_count_threshold
;
1847 /* Saw the character one or more times, but fewer than
1848 the repetition threshold. */
1851 if (options
->inspect_it
)
1852 obstack_grow_wstr (&wchar_buf
, LCST ("\\"));
1853 obstack_grow (&wchar_buf
, &wide_quote_char
,
1854 sizeof (gdb_wchar_t
));
1861 print_wchar (current_char
, orig_buf
,
1863 byte_order
, &wchar_buf
,
1864 quote_char
, &need_escape
);
1870 /* NUM_CHARS and the other outputs from wchar_iterate are valid
1871 here regardless of which branch was taken above. */
1881 case wchar_iterate_invalid
:
1884 if (options
->inspect_it
)
1885 obstack_grow_wstr (&wchar_buf
, LCST ("\\"));
1886 obstack_grow (&wchar_buf
, &wide_quote_char
,
1887 sizeof (gdb_wchar_t
));
1891 print_wchar (gdb_WEOF
, buf
, buflen
, width
, byte_order
,
1892 &wchar_buf
, quote_char
, &need_escape
);
1895 case wchar_iterate_incomplete
:
1898 if (options
->inspect_it
)
1899 obstack_grow_wstr (&wchar_buf
, LCST ("\\"));
1900 obstack_grow (&wchar_buf
, &wide_quote_char
,
1901 sizeof (gdb_wchar_t
));
1902 obstack_grow_wstr (&wchar_buf
, LCST (","));
1905 obstack_grow_wstr (&wchar_buf
,
1906 LCST (" <incomplete sequence "));
1907 print_wchar (gdb_WEOF
, buf
, buflen
, width
,
1908 byte_order
, &wchar_buf
,
1910 obstack_grow_wstr (&wchar_buf
, LCST (">"));
1916 /* Terminate the quotes if necessary. */
1919 if (options
->inspect_it
)
1920 obstack_grow_wstr (&wchar_buf
, LCST ("\\"));
1921 obstack_grow (&wchar_buf
, &wide_quote_char
,
1922 sizeof (gdb_wchar_t
));
1925 if (force_ellipses
|| !finished
)
1926 obstack_grow_wstr (&wchar_buf
, LCST ("..."));
1928 /* OUTPUT is where we collect `char's for printing. */
1929 obstack_init (&output
);
1930 make_cleanup_obstack_free (&output
);
1932 convert_between_encodings (INTERMEDIATE_ENCODING
, host_charset (),
1933 obstack_base (&wchar_buf
),
1934 obstack_object_size (&wchar_buf
),
1935 1, &output
, translit_char
);
1936 obstack_1grow (&output
, '\0');
1938 fputs_filtered (obstack_base (&output
), stream
);
1940 do_cleanups (cleanup
);
1943 /* Print a string from the inferior, starting at ADDR and printing up to LEN
1944 characters, of WIDTH bytes a piece, to STREAM. If LEN is -1, printing
1945 stops at the first null byte, otherwise printing proceeds (including null
1946 bytes) until either print_max or LEN characters have been printed,
1947 whichever is smaller. ENCODING is the name of the string's
1948 encoding. It can be NULL, in which case the target encoding is
1952 val_print_string (struct type
*elttype
, const char *encoding
,
1953 CORE_ADDR addr
, int len
,
1954 struct ui_file
*stream
,
1955 const struct value_print_options
*options
)
1957 int force_ellipsis
= 0; /* Force ellipsis to be printed if nonzero. */
1958 int errcode
; /* Errno returned from bad reads. */
1959 int found_nul
; /* Non-zero if we found the nul char. */
1960 unsigned int fetchlimit
; /* Maximum number of chars to print. */
1962 gdb_byte
*buffer
= NULL
; /* Dynamically growable fetch buffer. */
1963 struct cleanup
*old_chain
= NULL
; /* Top of the old cleanup chain. */
1964 struct gdbarch
*gdbarch
= get_type_arch (elttype
);
1965 enum bfd_endian byte_order
= gdbarch_byte_order (gdbarch
);
1966 int width
= TYPE_LENGTH (elttype
);
1968 /* First we need to figure out the limit on the number of characters we are
1969 going to attempt to fetch and print. This is actually pretty simple. If
1970 LEN >= zero, then the limit is the minimum of LEN and print_max. If
1971 LEN is -1, then the limit is print_max. This is true regardless of
1972 whether print_max is zero, UINT_MAX (unlimited), or something in between,
1973 because finding the null byte (or available memory) is what actually
1974 limits the fetch. */
1976 fetchlimit
= (len
== -1 ? options
->print_max
: min (len
,
1977 options
->print_max
));
1979 errcode
= read_string (addr
, len
, width
, fetchlimit
, byte_order
,
1980 &buffer
, &bytes_read
);
1981 old_chain
= make_cleanup (xfree
, buffer
);
1985 /* We now have either successfully filled the buffer to fetchlimit,
1986 or terminated early due to an error or finding a null char when
1989 /* Determine found_nul by looking at the last character read. */
1990 found_nul
= extract_unsigned_integer (buffer
+ bytes_read
- width
, width
,
1992 if (len
== -1 && !found_nul
)
1996 /* We didn't find a NUL terminator we were looking for. Attempt
1997 to peek at the next character. If not successful, or it is not
1998 a null byte, then force ellipsis to be printed. */
2000 peekbuf
= (gdb_byte
*) alloca (width
);
2002 if (target_read_memory (addr
, peekbuf
, width
) == 0
2003 && extract_unsigned_integer (peekbuf
, width
, byte_order
) != 0)
2006 else if ((len
>= 0 && errcode
!= 0) || (len
> bytes_read
/ width
))
2008 /* Getting an error when we have a requested length, or fetching less
2009 than the number of characters actually requested, always make us
2014 /* If we get an error before fetching anything, don't print a string.
2015 But if we fetch something and then get an error, print the string
2016 and then the error message. */
2017 if (errcode
== 0 || bytes_read
> 0)
2019 if (options
->addressprint
)
2021 fputs_filtered (" ", stream
);
2023 LA_PRINT_STRING (stream
, elttype
, buffer
, bytes_read
/ width
,
2024 encoding
, force_ellipsis
, options
);
2031 fprintf_filtered (stream
, " <Address ");
2032 fputs_filtered (paddress (gdbarch
, addr
), stream
);
2033 fprintf_filtered (stream
, " out of bounds>");
2037 fprintf_filtered (stream
, " <Error reading address ");
2038 fputs_filtered (paddress (gdbarch
, addr
), stream
);
2039 fprintf_filtered (stream
, ": %s>", safe_strerror (errcode
));
2044 do_cleanups (old_chain
);
2046 return (bytes_read
/ width
);
2050 /* The 'set input-radix' command writes to this auxiliary variable.
2051 If the requested radix is valid, INPUT_RADIX is updated; otherwise,
2052 it is left unchanged. */
2054 static unsigned input_radix_1
= 10;
2056 /* Validate an input or output radix setting, and make sure the user
2057 knows what they really did here. Radix setting is confusing, e.g.
2058 setting the input radix to "10" never changes it! */
2061 set_input_radix (char *args
, int from_tty
, struct cmd_list_element
*c
)
2063 set_input_radix_1 (from_tty
, input_radix_1
);
2067 set_input_radix_1 (int from_tty
, unsigned radix
)
2069 /* We don't currently disallow any input radix except 0 or 1, which don't
2070 make any mathematical sense. In theory, we can deal with any input
2071 radix greater than 1, even if we don't have unique digits for every
2072 value from 0 to radix-1, but in practice we lose on large radix values.
2073 We should either fix the lossage or restrict the radix range more.
2078 input_radix_1
= input_radix
;
2079 error (_("Nonsense input radix ``decimal %u''; input radix unchanged."),
2082 input_radix_1
= input_radix
= radix
;
2085 printf_filtered (_("Input radix now set to "
2086 "decimal %u, hex %x, octal %o.\n"),
2087 radix
, radix
, radix
);
2091 /* The 'set output-radix' command writes to this auxiliary variable.
2092 If the requested radix is valid, OUTPUT_RADIX is updated,
2093 otherwise, it is left unchanged. */
2095 static unsigned output_radix_1
= 10;
2098 set_output_radix (char *args
, int from_tty
, struct cmd_list_element
*c
)
2100 set_output_radix_1 (from_tty
, output_radix_1
);
2104 set_output_radix_1 (int from_tty
, unsigned radix
)
2106 /* Validate the radix and disallow ones that we aren't prepared to
2107 handle correctly, leaving the radix unchanged. */
2111 user_print_options
.output_format
= 'x'; /* hex */
2114 user_print_options
.output_format
= 0; /* decimal */
2117 user_print_options
.output_format
= 'o'; /* octal */
2120 output_radix_1
= output_radix
;
2121 error (_("Unsupported output radix ``decimal %u''; "
2122 "output radix unchanged."),
2125 output_radix_1
= output_radix
= radix
;
2128 printf_filtered (_("Output radix now set to "
2129 "decimal %u, hex %x, octal %o.\n"),
2130 radix
, radix
, radix
);
2134 /* Set both the input and output radix at once. Try to set the output radix
2135 first, since it has the most restrictive range. An radix that is valid as
2136 an output radix is also valid as an input radix.
2138 It may be useful to have an unusual input radix. If the user wishes to
2139 set an input radix that is not valid as an output radix, he needs to use
2140 the 'set input-radix' command. */
2143 set_radix (char *arg
, int from_tty
)
2147 radix
= (arg
== NULL
) ? 10 : parse_and_eval_long (arg
);
2148 set_output_radix_1 (0, radix
);
2149 set_input_radix_1 (0, radix
);
2152 printf_filtered (_("Input and output radices now set to "
2153 "decimal %u, hex %x, octal %o.\n"),
2154 radix
, radix
, radix
);
2158 /* Show both the input and output radices. */
2161 show_radix (char *arg
, int from_tty
)
2165 if (input_radix
== output_radix
)
2167 printf_filtered (_("Input and output radices set to "
2168 "decimal %u, hex %x, octal %o.\n"),
2169 input_radix
, input_radix
, input_radix
);
2173 printf_filtered (_("Input radix set to decimal "
2174 "%u, hex %x, octal %o.\n"),
2175 input_radix
, input_radix
, input_radix
);
2176 printf_filtered (_("Output radix set to decimal "
2177 "%u, hex %x, octal %o.\n"),
2178 output_radix
, output_radix
, output_radix
);
2185 set_print (char *arg
, int from_tty
)
2188 "\"set print\" must be followed by the name of a print subcommand.\n");
2189 help_list (setprintlist
, "set print ", -1, gdb_stdout
);
2193 show_print (char *args
, int from_tty
)
2195 cmd_show_list (showprintlist
, from_tty
, "");
2199 _initialize_valprint (void)
2201 add_prefix_cmd ("print", no_class
, set_print
,
2202 _("Generic command for setting how things print."),
2203 &setprintlist
, "set print ", 0, &setlist
);
2204 add_alias_cmd ("p", "print", no_class
, 1, &setlist
);
2205 /* Prefer set print to set prompt. */
2206 add_alias_cmd ("pr", "print", no_class
, 1, &setlist
);
2208 add_prefix_cmd ("print", no_class
, show_print
,
2209 _("Generic command for showing print settings."),
2210 &showprintlist
, "show print ", 0, &showlist
);
2211 add_alias_cmd ("p", "print", no_class
, 1, &showlist
);
2212 add_alias_cmd ("pr", "print", no_class
, 1, &showlist
);
2214 add_setshow_uinteger_cmd ("elements", no_class
,
2215 &user_print_options
.print_max
, _("\
2216 Set limit on string chars or array elements to print."), _("\
2217 Show limit on string chars or array elements to print."), _("\
2218 \"set print elements 0\" causes there to be no limit."),
2221 &setprintlist
, &showprintlist
);
2223 add_setshow_boolean_cmd ("null-stop", no_class
,
2224 &user_print_options
.stop_print_at_null
, _("\
2225 Set printing of char arrays to stop at first null char."), _("\
2226 Show printing of char arrays to stop at first null char."), NULL
,
2228 show_stop_print_at_null
,
2229 &setprintlist
, &showprintlist
);
2231 add_setshow_uinteger_cmd ("repeats", no_class
,
2232 &user_print_options
.repeat_count_threshold
, _("\
2233 Set threshold for repeated print elements."), _("\
2234 Show threshold for repeated print elements."), _("\
2235 \"set print repeats 0\" causes all elements to be individually printed."),
2237 show_repeat_count_threshold
,
2238 &setprintlist
, &showprintlist
);
2240 add_setshow_boolean_cmd ("pretty", class_support
,
2241 &user_print_options
.prettyprint_structs
, _("\
2242 Set prettyprinting of structures."), _("\
2243 Show prettyprinting of structures."), NULL
,
2245 show_prettyprint_structs
,
2246 &setprintlist
, &showprintlist
);
2248 add_setshow_boolean_cmd ("union", class_support
,
2249 &user_print_options
.unionprint
, _("\
2250 Set printing of unions interior to structures."), _("\
2251 Show printing of unions interior to structures."), NULL
,
2254 &setprintlist
, &showprintlist
);
2256 add_setshow_boolean_cmd ("array", class_support
,
2257 &user_print_options
.prettyprint_arrays
, _("\
2258 Set prettyprinting of arrays."), _("\
2259 Show prettyprinting of arrays."), NULL
,
2261 show_prettyprint_arrays
,
2262 &setprintlist
, &showprintlist
);
2264 add_setshow_boolean_cmd ("address", class_support
,
2265 &user_print_options
.addressprint
, _("\
2266 Set printing of addresses."), _("\
2267 Show printing of addresses."), NULL
,
2270 &setprintlist
, &showprintlist
);
2272 add_setshow_zuinteger_cmd ("input-radix", class_support
, &input_radix_1
,
2274 Set default input radix for entering numbers."), _("\
2275 Show default input radix for entering numbers."), NULL
,
2278 &setlist
, &showlist
);
2280 add_setshow_zuinteger_cmd ("output-radix", class_support
, &output_radix_1
,
2282 Set default output radix for printing of values."), _("\
2283 Show default output radix for printing of values."), NULL
,
2286 &setlist
, &showlist
);
2288 /* The "set radix" and "show radix" commands are special in that
2289 they are like normal set and show commands but allow two normally
2290 independent variables to be either set or shown with a single
2291 command. So the usual deprecated_add_set_cmd() and [deleted]
2292 add_show_from_set() commands aren't really appropriate. */
2293 /* FIXME: i18n: With the new add_setshow_integer command, that is no
2294 longer true - show can display anything. */
2295 add_cmd ("radix", class_support
, set_radix
, _("\
2296 Set default input and output number radices.\n\
2297 Use 'set input-radix' or 'set output-radix' to independently set each.\n\
2298 Without an argument, sets both radices back to the default value of 10."),
2300 add_cmd ("radix", class_support
, show_radix
, _("\
2301 Show the default input and output number radices.\n\
2302 Use 'show input-radix' or 'show output-radix' to independently show each."),
2305 add_setshow_boolean_cmd ("array-indexes", class_support
,
2306 &user_print_options
.print_array_indexes
, _("\
2307 Set printing of array indexes."), _("\
2308 Show printing of array indexes"), NULL
, NULL
, show_print_array_indexes
,
2309 &setprintlist
, &showprintlist
);