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 This is a preferable interface to val_print, above, because it uses
436 GDB's value mechanism. */
439 common_val_print (struct value *val, struct ui_file *stream, int recurse,
440 const struct value_print_options *options,
441 const struct language_defn *language)
443 if (!value_check_printable (val, stream, options))
446 if (language->la_language == language_ada)
447 /* The value might have a dynamic type, which would cause trouble
448 below when trying to extract the value contents (since the value
449 size is determined from the type size which is unknown). So
450 get a fixed representation of our value. */
451 val = ada_to_fixed_value (val);
453 val_print (value_type (val), value_contents_for_printing (val),
454 value_embedded_offset (val), value_address (val),
456 val, options, language);
459 /* Print on stream STREAM the value VAL according to OPTIONS. The value
460 is printed using the current_language syntax. */
463 value_print (struct value *val, struct ui_file *stream,
464 const struct value_print_options *options)
466 if (!value_check_printable (val, stream, options))
471 int r = apply_val_pretty_printer (value_type (val),
472 value_contents_for_printing (val),
473 value_embedded_offset (val),
476 val, options, current_language);
482 LA_VALUE_PRINT (val, stream, options);
485 /* Called by various <lang>_val_print routines to print
486 TYPE_CODE_INT's. TYPE is the type. VALADDR is the address of the
487 value. STREAM is where to print the value. */
490 val_print_type_code_int (struct type *type, const gdb_byte *valaddr,
491 struct ui_file *stream)
493 enum bfd_endian byte_order = gdbarch_byte_order (get_type_arch (type));
495 if (TYPE_LENGTH (type) > sizeof (LONGEST))
499 if (TYPE_UNSIGNED (type)
500 && extract_long_unsigned_integer (valaddr, TYPE_LENGTH (type),
503 print_longest (stream, 'u', 0, val);
507 /* Signed, or we couldn't turn an unsigned value into a
508 LONGEST. For signed values, one could assume two's
509 complement (a reasonable assumption, I think) and do
511 print_hex_chars (stream, (unsigned char *) valaddr,
512 TYPE_LENGTH (type), byte_order);
517 print_longest (stream, TYPE_UNSIGNED (type) ? 'u' : 'd', 0,
518 unpack_long (type, valaddr));
523 val_print_type_code_flags (struct type *type, const gdb_byte *valaddr,
524 struct ui_file *stream)
526 ULONGEST val = unpack_long (type, valaddr);
527 int bitpos, nfields = TYPE_NFIELDS (type);
529 fputs_filtered ("[ ", stream);
530 for (bitpos = 0; bitpos < nfields; bitpos++)
532 if (TYPE_FIELD_BITPOS (type, bitpos) != -1
533 && (val & ((ULONGEST)1 << bitpos)))
535 if (TYPE_FIELD_NAME (type, bitpos))
536 fprintf_filtered (stream, "%s ", TYPE_FIELD_NAME (type, bitpos));
538 fprintf_filtered (stream, "#%d ", bitpos);
541 fputs_filtered ("]", stream);
544 /* Print a scalar of data of type TYPE, pointed to in GDB by VALADDR,
545 according to OPTIONS and SIZE on STREAM. Format i is not supported
548 This is how the elements of an array or structure are printed
552 val_print_scalar_formatted (struct type *type,
553 const gdb_byte *valaddr, int embedded_offset,
554 const struct value *val,
555 const struct value_print_options *options,
557 struct ui_file *stream)
559 gdb_assert (val != NULL);
560 gdb_assert (valaddr == value_contents_for_printing_const (val));
562 /* If we get here with a string format, try again without it. Go
563 all the way back to the language printers, which may call us
565 if (options->format == 's')
567 struct value_print_options opts = *options;
570 val_print (type, valaddr, embedded_offset, 0, stream, 0, val, &opts,
575 /* A scalar object that does not have all bits available can't be
576 printed, because all bits contribute to its representation. */
577 if (!value_bits_valid (val, TARGET_CHAR_BIT * embedded_offset,
578 TARGET_CHAR_BIT * TYPE_LENGTH (type)))
579 val_print_optimized_out (stream);
580 else if (!value_bytes_available (val, embedded_offset, TYPE_LENGTH (type)))
581 val_print_unavailable (stream);
583 print_scalar_formatted (valaddr + embedded_offset, type,
584 options, size, stream);
587 /* Print a number according to FORMAT which is one of d,u,x,o,b,h,w,g.
588 The raison d'etre of this function is to consolidate printing of
589 LONG_LONG's into this one function. The format chars b,h,w,g are
590 from print_scalar_formatted(). Numbers are printed using C
593 USE_C_FORMAT means to use C format in all cases. Without it,
594 'o' and 'x' format do not include the standard C radix prefix
597 Hilfinger/2004-09-09: USE_C_FORMAT was originally called USE_LOCAL
598 and was intended to request formating according to the current
599 language and would be used for most integers that GDB prints. The
600 exceptional cases were things like protocols where the format of
601 the integer is a protocol thing, not a user-visible thing). The
602 parameter remains to preserve the information of what things might
603 be printed with language-specific format, should we ever resurrect
607 print_longest (struct ui_file *stream, int format, int use_c_format,
615 val = int_string (val_long, 10, 1, 0, 1); break;
617 val = int_string (val_long, 10, 0, 0, 1); break;
619 val = int_string (val_long, 16, 0, 0, use_c_format); break;
621 val = int_string (val_long, 16, 0, 2, 1); break;
623 val = int_string (val_long, 16, 0, 4, 1); break;
625 val = int_string (val_long, 16, 0, 8, 1); break;
627 val = int_string (val_long, 16, 0, 16, 1); break;
630 val = int_string (val_long, 8, 0, 0, use_c_format); break;
632 internal_error (__FILE__, __LINE__,
633 _("failed internal consistency check"));
635 fputs_filtered (val, stream);
638 /* This used to be a macro, but I don't think it is called often enough
639 to merit such treatment. */
640 /* Convert a LONGEST to an int. This is used in contexts (e.g. number of
641 arguments to a function, number in a value history, register number, etc.)
642 where the value must not be larger than can fit in an int. */
645 longest_to_int (LONGEST arg)
647 /* Let the compiler do the work. */
648 int rtnval = (int) arg;
650 /* Check for overflows or underflows. */
651 if (sizeof (LONGEST) > sizeof (int))
655 error (_("Value out of range."));
661 /* Print a floating point value of type TYPE (not always a
662 TYPE_CODE_FLT), pointed to in GDB by VALADDR, on STREAM. */
665 print_floating (const gdb_byte *valaddr, struct type *type,
666 struct ui_file *stream)
670 const struct floatformat *fmt = NULL;
671 unsigned len = TYPE_LENGTH (type);
672 enum float_kind kind;
674 /* If it is a floating-point, check for obvious problems. */
675 if (TYPE_CODE (type) == TYPE_CODE_FLT)
676 fmt = floatformat_from_type (type);
679 kind = floatformat_classify (fmt, valaddr);
680 if (kind == float_nan)
682 if (floatformat_is_negative (fmt, valaddr))
683 fprintf_filtered (stream, "-");
684 fprintf_filtered (stream, "nan(");
685 fputs_filtered ("0x", stream);
686 fputs_filtered (floatformat_mantissa (fmt, valaddr), stream);
687 fprintf_filtered (stream, ")");
690 else if (kind == float_infinite)
692 if (floatformat_is_negative (fmt, valaddr))
693 fputs_filtered ("-", stream);
694 fputs_filtered ("inf", stream);
699 /* NOTE: cagney/2002-01-15: The TYPE passed into print_floating()
700 isn't necessarily a TYPE_CODE_FLT. Consequently, unpack_double
701 needs to be used as that takes care of any necessary type
702 conversions. Such conversions are of course direct to DOUBLEST
703 and disregard any possible target floating point limitations.
704 For instance, a u64 would be converted and displayed exactly on a
705 host with 80 bit DOUBLEST but with loss of information on a host
706 with 64 bit DOUBLEST. */
708 doub = unpack_double (type, valaddr, &inv);
711 fprintf_filtered (stream, "<invalid float value>");
715 /* FIXME: kettenis/2001-01-20: The following code makes too much
716 assumptions about the host and target floating point format. */
718 /* NOTE: cagney/2002-02-03: Since the TYPE of what was passed in may
719 not necessarily be a TYPE_CODE_FLT, the below ignores that and
720 instead uses the type's length to determine the precision of the
721 floating-point value being printed. */
723 if (len < sizeof (double))
724 fprintf_filtered (stream, "%.9g", (double) doub);
725 else if (len == sizeof (double))
726 fprintf_filtered (stream, "%.17g", (double) doub);
728 #ifdef PRINTF_HAS_LONG_DOUBLE
729 fprintf_filtered (stream, "%.35Lg", doub);
731 /* This at least wins with values that are representable as
733 fprintf_filtered (stream, "%.17g", (double) doub);
738 print_decimal_floating (const gdb_byte *valaddr, struct type *type,
739 struct ui_file *stream)
741 enum bfd_endian byte_order = gdbarch_byte_order (get_type_arch (type));
742 char decstr[MAX_DECIMAL_STRING];
743 unsigned len = TYPE_LENGTH (type);
745 decimal_to_string (valaddr, len, byte_order, decstr);
746 fputs_filtered (decstr, stream);
751 print_binary_chars (struct ui_file *stream, const gdb_byte *valaddr,
752 unsigned len, enum bfd_endian byte_order)
755 #define BITS_IN_BYTES 8
761 /* Declared "int" so it will be signed.
762 This ensures that right shift will shift in zeros. */
764 const int mask = 0x080;
766 /* FIXME: We should be not printing leading zeroes in most cases. */
768 if (byte_order == BFD_ENDIAN_BIG)
774 /* Every byte has 8 binary characters; peel off
775 and print from the MSB end. */
777 for (i = 0; i < (BITS_IN_BYTES * sizeof (*p)); i++)
779 if (*p & (mask >> i))
784 fprintf_filtered (stream, "%1d", b);
790 for (p = valaddr + len - 1;
794 for (i = 0; i < (BITS_IN_BYTES * sizeof (*p)); i++)
796 if (*p & (mask >> i))
801 fprintf_filtered (stream, "%1d", b);
807 /* VALADDR points to an integer of LEN bytes.
808 Print it in octal on stream or format it in buf. */
811 print_octal_chars (struct ui_file *stream, const gdb_byte *valaddr,
812 unsigned len, enum bfd_endian byte_order)
815 unsigned char octa1, octa2, octa3, carry;
818 /* FIXME: We should be not printing leading zeroes in most cases. */
821 /* Octal is 3 bits, which doesn't fit. Yuk. So we have to track
822 * the extra bits, which cycle every three bytes:
826 * bit number 123 456 78 | 9 012 345 6 | 78 901 234 | 567 890 12 |
828 * Octal side: 0 1 carry 3 4 carry ...
830 * Cycle number: 0 1 2
832 * But of course we are printing from the high side, so we have to
833 * figure out where in the cycle we are so that we end up with no
834 * left over bits at the end.
836 #define BITS_IN_OCTAL 3
837 #define HIGH_ZERO 0340
838 #define LOW_ZERO 0016
839 #define CARRY_ZERO 0003
840 #define HIGH_ONE 0200
843 #define CARRY_ONE 0001
844 #define HIGH_TWO 0300
848 /* For 32 we start in cycle 2, with two bits and one bit carry;
849 for 64 in cycle in cycle 1, with one bit and a two bit carry. */
851 cycle = (len * BITS_IN_BYTES) % BITS_IN_OCTAL;
854 fputs_filtered ("0", stream);
855 if (byte_order == BFD_ENDIAN_BIG)
864 /* No carry in, carry out two bits. */
866 octa1 = (HIGH_ZERO & *p) >> 5;
867 octa2 = (LOW_ZERO & *p) >> 2;
868 carry = (CARRY_ZERO & *p);
869 fprintf_filtered (stream, "%o", octa1);
870 fprintf_filtered (stream, "%o", octa2);
874 /* Carry in two bits, carry out one bit. */
876 octa1 = (carry << 1) | ((HIGH_ONE & *p) >> 7);
877 octa2 = (MID_ONE & *p) >> 4;
878 octa3 = (LOW_ONE & *p) >> 1;
879 carry = (CARRY_ONE & *p);
880 fprintf_filtered (stream, "%o", octa1);
881 fprintf_filtered (stream, "%o", octa2);
882 fprintf_filtered (stream, "%o", octa3);
886 /* Carry in one bit, no carry out. */
888 octa1 = (carry << 2) | ((HIGH_TWO & *p) >> 6);
889 octa2 = (MID_TWO & *p) >> 3;
890 octa3 = (LOW_TWO & *p);
892 fprintf_filtered (stream, "%o", octa1);
893 fprintf_filtered (stream, "%o", octa2);
894 fprintf_filtered (stream, "%o", octa3);
898 error (_("Internal error in octal conversion;"));
902 cycle = cycle % BITS_IN_OCTAL;
907 for (p = valaddr + len - 1;
914 /* Carry out, no carry in */
916 octa1 = (HIGH_ZERO & *p) >> 5;
917 octa2 = (LOW_ZERO & *p) >> 2;
918 carry = (CARRY_ZERO & *p);
919 fprintf_filtered (stream, "%o", octa1);
920 fprintf_filtered (stream, "%o", octa2);
924 /* Carry in, carry out */
926 octa1 = (carry << 1) | ((HIGH_ONE & *p) >> 7);
927 octa2 = (MID_ONE & *p) >> 4;
928 octa3 = (LOW_ONE & *p) >> 1;
929 carry = (CARRY_ONE & *p);
930 fprintf_filtered (stream, "%o", octa1);
931 fprintf_filtered (stream, "%o", octa2);
932 fprintf_filtered (stream, "%o", octa3);
936 /* Carry in, no carry out */
938 octa1 = (carry << 2) | ((HIGH_TWO & *p) >> 6);
939 octa2 = (MID_TWO & *p) >> 3;
940 octa3 = (LOW_TWO & *p);
942 fprintf_filtered (stream, "%o", octa1);
943 fprintf_filtered (stream, "%o", octa2);
944 fprintf_filtered (stream, "%o", octa3);
948 error (_("Internal error in octal conversion;"));
952 cycle = cycle % BITS_IN_OCTAL;
958 /* VALADDR points to an integer of LEN bytes.
959 Print it in decimal on stream or format it in buf. */
962 print_decimal_chars (struct ui_file *stream, const gdb_byte *valaddr,
963 unsigned len, enum bfd_endian byte_order)
966 #define CARRY_OUT( x ) ((x) / TEN) /* extend char to int */
967 #define CARRY_LEFT( x ) ((x) % TEN)
968 #define SHIFT( x ) ((x) << 4)
969 #define LOW_NIBBLE( x ) ( (x) & 0x00F)
970 #define HIGH_NIBBLE( x ) (((x) & 0x0F0) >> 4)
973 unsigned char *digits;
976 int i, j, decimal_digits;
980 /* Base-ten number is less than twice as many digits
981 as the base 16 number, which is 2 digits per byte. */
983 decimal_len = len * 2 * 2;
984 digits = xmalloc (decimal_len);
986 for (i = 0; i < decimal_len; i++)
991 /* Ok, we have an unknown number of bytes of data to be printed in
994 * Given a hex number (in nibbles) as XYZ, we start by taking X and
995 * decemalizing it as "x1 x2" in two decimal nibbles. Then we multiply
996 * the nibbles by 16, add Y and re-decimalize. Repeat with Z.
998 * The trick is that "digits" holds a base-10 number, but sometimes
999 * the individual digits are > 10.
1001 * Outer loop is per nibble (hex digit) of input, from MSD end to
1004 decimal_digits = 0; /* Number of decimal digits so far */
1005 p = (byte_order == BFD_ENDIAN_BIG) ? valaddr : valaddr + len - 1;
1007 while ((byte_order == BFD_ENDIAN_BIG) ? (p < valaddr + len) : (p >= valaddr))
1010 * Multiply current base-ten number by 16 in place.
1011 * Each digit was between 0 and 9, now is between
1014 for (j = 0; j < decimal_digits; j++)
1016 digits[j] = SHIFT (digits[j]);
1019 /* Take the next nibble off the input and add it to what
1020 * we've got in the LSB position. Bottom 'digit' is now
1021 * between 0 and 159.
1023 * "flip" is used to run this loop twice for each byte.
1027 /* Take top nibble. */
1029 digits[0] += HIGH_NIBBLE (*p);
1034 /* Take low nibble and bump our pointer "p". */
1036 digits[0] += LOW_NIBBLE (*p);
1037 if (byte_order == BFD_ENDIAN_BIG)
1044 /* Re-decimalize. We have to do this often enough
1045 * that we don't overflow, but once per nibble is
1046 * overkill. Easier this way, though. Note that the
1047 * carry is often larger than 10 (e.g. max initial
1048 * carry out of lowest nibble is 15, could bubble all
1049 * the way up greater than 10). So we have to do
1050 * the carrying beyond the last current digit.
1053 for (j = 0; j < decimal_len - 1; j++)
1057 /* "/" won't handle an unsigned char with
1058 * a value that if signed would be negative.
1059 * So extend to longword int via "dummy".
1062 carry = CARRY_OUT (dummy);
1063 digits[j] = CARRY_LEFT (dummy);
1065 if (j >= decimal_digits && carry == 0)
1068 * All higher digits are 0 and we
1069 * no longer have a carry.
1071 * Note: "j" is 0-based, "decimal_digits" is
1074 decimal_digits = j + 1;
1080 /* Ok, now "digits" is the decimal representation, with
1081 the "decimal_digits" actual digits. Print! */
1083 for (i = decimal_digits - 1; i >= 0; i--)
1085 fprintf_filtered (stream, "%1d", digits[i]);
1090 /* VALADDR points to an integer of LEN bytes. Print it in hex on stream. */
1093 print_hex_chars (struct ui_file *stream, const gdb_byte *valaddr,
1094 unsigned len, enum bfd_endian byte_order)
1098 /* FIXME: We should be not printing leading zeroes in most cases. */
1100 fputs_filtered ("0x", stream);
1101 if (byte_order == BFD_ENDIAN_BIG)
1107 fprintf_filtered (stream, "%02x", *p);
1112 for (p = valaddr + len - 1;
1116 fprintf_filtered (stream, "%02x", *p);
1121 /* VALADDR points to a char integer of LEN bytes.
1122 Print it out in appropriate language form on stream.
1123 Omit any leading zero chars. */
1126 print_char_chars (struct ui_file *stream, struct type *type,
1127 const gdb_byte *valaddr,
1128 unsigned len, enum bfd_endian byte_order)
1132 if (byte_order == BFD_ENDIAN_BIG)
1135 while (p < valaddr + len - 1 && *p == 0)
1138 while (p < valaddr + len)
1140 LA_EMIT_CHAR (*p, type, stream, '\'');
1146 p = valaddr + len - 1;
1147 while (p > valaddr && *p == 0)
1150 while (p >= valaddr)
1152 LA_EMIT_CHAR (*p, type, stream, '\'');
1158 /* Print function pointer with inferior address ADDRESS onto stdio
1162 print_function_pointer_address (struct gdbarch *gdbarch,
1164 struct ui_file *stream,
1168 = gdbarch_convert_from_func_ptr_addr (gdbarch, address,
1171 /* If the function pointer is represented by a description, print
1172 the address of the description. */
1173 if (addressprint && func_addr != address)
1175 fputs_filtered ("@", stream);
1176 fputs_filtered (paddress (gdbarch, address), stream);
1177 fputs_filtered (": ", stream);
1179 print_address_demangle (gdbarch, func_addr, stream, demangle);
1183 /* Print on STREAM using the given OPTIONS the index for the element
1184 at INDEX of an array whose index type is INDEX_TYPE. */
1187 maybe_print_array_index (struct type *index_type, LONGEST index,
1188 struct ui_file *stream,
1189 const struct value_print_options *options)
1191 struct value *index_value;
1193 if (!options->print_array_indexes)
1196 index_value = value_from_longest (index_type, index);
1198 LA_PRINT_ARRAY_INDEX (index_value, stream, options);
1201 /* Called by various <lang>_val_print routines to print elements of an
1202 array in the form "<elem1>, <elem2>, <elem3>, ...".
1204 (FIXME?) Assumes array element separator is a comma, which is correct
1205 for all languages currently handled.
1206 (FIXME?) Some languages have a notation for repeated array elements,
1207 perhaps we should try to use that notation when appropriate. */
1210 val_print_array_elements (struct type *type,
1211 const gdb_byte *valaddr, int embedded_offset,
1212 CORE_ADDR address, struct ui_file *stream,
1214 const struct value *val,
1215 const struct value_print_options *options,
1218 unsigned int things_printed = 0;
1220 struct type *elttype, *index_type;
1222 /* Position of the array element we are examining to see
1223 whether it is repeated. */
1225 /* Number of repetitions we have detected so far. */
1227 LONGEST low_bound, high_bound;
1229 elttype = TYPE_TARGET_TYPE (type);
1230 eltlen = TYPE_LENGTH (check_typedef (elttype));
1231 index_type = TYPE_INDEX_TYPE (type);
1233 if (get_array_bounds (type, &low_bound, &high_bound))
1235 /* The array length should normally be HIGH_BOUND - LOW_BOUND + 1.
1236 But we have to be a little extra careful, because some languages
1237 such as Ada allow LOW_BOUND to be greater than HIGH_BOUND for
1238 empty arrays. In that situation, the array length is just zero,
1240 if (low_bound > high_bound)
1243 len = high_bound - low_bound + 1;
1247 warning (_("unable to get bounds of array, assuming null array"));
1252 annotate_array_section_begin (i, elttype);
1254 for (; i < len && things_printed < options->print_max; i++)
1258 if (options->prettyprint_arrays)
1260 fprintf_filtered (stream, ",\n");
1261 print_spaces_filtered (2 + 2 * recurse, stream);
1265 fprintf_filtered (stream, ", ");
1268 wrap_here (n_spaces (2 + 2 * recurse));
1269 maybe_print_array_index (index_type, i + low_bound,
1274 /* Only check for reps if repeat_count_threshold is not set to
1275 UINT_MAX (unlimited). */
1276 if (options->repeat_count_threshold < UINT_MAX)
1279 && value_available_contents_eq (val,
1280 embedded_offset + i * eltlen,
1291 if (reps > options->repeat_count_threshold)
1293 val_print (elttype, valaddr, embedded_offset + i * eltlen,
1294 address, stream, recurse + 1, val, options,
1296 annotate_elt_rep (reps);
1297 fprintf_filtered (stream, " <repeats %u times>", reps);
1298 annotate_elt_rep_end ();
1301 things_printed += options->repeat_count_threshold;
1305 val_print (elttype, valaddr, embedded_offset + i * eltlen,
1307 stream, recurse + 1, val, options, current_language);
1312 annotate_array_section_end ();
1315 fprintf_filtered (stream, "...");
1319 /* Read LEN bytes of target memory at address MEMADDR, placing the
1320 results in GDB's memory at MYADDR. Returns a count of the bytes
1321 actually read, and optionally an errno value in the location
1322 pointed to by ERRNOPTR if ERRNOPTR is non-null. */
1324 /* FIXME: cagney/1999-10-14: Only used by val_print_string. Can this
1325 function be eliminated. */
1328 partial_memory_read (CORE_ADDR memaddr, gdb_byte *myaddr,
1329 int len, int *errnoptr)
1331 int nread; /* Number of bytes actually read. */
1332 int errcode; /* Error from last read. */
1334 /* First try a complete read. */
1335 errcode = target_read_memory (memaddr, myaddr, len);
1343 /* Loop, reading one byte at a time until we get as much as we can. */
1344 for (errcode = 0, nread = 0; len > 0 && errcode == 0; nread++, len--)
1346 errcode = target_read_memory (memaddr++, myaddr++, 1);
1348 /* If an error, the last read was unsuccessful, so adjust count. */
1354 if (errnoptr != NULL)
1356 *errnoptr = errcode;
1361 /* Read a string from the inferior, at ADDR, with LEN characters of WIDTH bytes
1362 each. Fetch at most FETCHLIMIT characters. BUFFER will be set to a newly
1363 allocated buffer containing the string, which the caller is responsible to
1364 free, and BYTES_READ will be set to the number of bytes read. Returns 0 on
1365 success, or errno on failure.
1367 If LEN > 0, reads exactly LEN characters (including eventual NULs in
1368 the middle or end of the string). If LEN is -1, stops at the first
1369 null character (not necessarily the first null byte) up to a maximum
1370 of FETCHLIMIT characters. Set FETCHLIMIT to UINT_MAX to read as many
1371 characters as possible from the string.
1373 Unless an exception is thrown, BUFFER will always be allocated, even on
1374 failure. In this case, some characters might have been read before the
1375 failure happened. Check BYTES_READ to recognize this situation.
1377 Note: There was a FIXME asking to make this code use target_read_string,
1378 but this function is more general (can read past null characters, up to
1379 given LEN). Besides, it is used much more often than target_read_string
1380 so it is more tested. Perhaps callers of target_read_string should use
1381 this function instead? */
1384 read_string (CORE_ADDR addr, int len, int width, unsigned int fetchlimit,
1385 enum bfd_endian byte_order, gdb_byte **buffer, int *bytes_read)
1387 int found_nul; /* Non-zero if we found the nul char. */
1388 int errcode; /* Errno returned from bad reads. */
1389 unsigned int nfetch; /* Chars to fetch / chars fetched. */
1390 unsigned int chunksize; /* Size of each fetch, in chars. */
1391 gdb_byte *bufptr; /* Pointer to next available byte in
1393 gdb_byte *limit; /* First location past end of fetch buffer. */
1394 struct cleanup *old_chain = NULL; /* Top of the old cleanup chain. */
1396 /* Decide how large of chunks to try to read in one operation. This
1397 is also pretty simple. If LEN >= zero, then we want fetchlimit chars,
1398 so we might as well read them all in one operation. If LEN is -1, we
1399 are looking for a NUL terminator to end the fetching, so we might as
1400 well read in blocks that are large enough to be efficient, but not so
1401 large as to be slow if fetchlimit happens to be large. So we choose the
1402 minimum of 8 and fetchlimit. We used to use 200 instead of 8 but
1403 200 is way too big for remote debugging over a serial line. */
1405 chunksize = (len == -1 ? min (8, fetchlimit) : fetchlimit);
1407 /* Loop until we either have all the characters, or we encounter
1408 some error, such as bumping into the end of the address space. */
1413 old_chain = make_cleanup (free_current_contents, buffer);
1417 *buffer = (gdb_byte *) xmalloc (len * width);
1420 nfetch = partial_memory_read (addr, bufptr, len * width, &errcode)
1422 addr += nfetch * width;
1423 bufptr += nfetch * width;
1427 unsigned long bufsize = 0;
1432 nfetch = min (chunksize, fetchlimit - bufsize);
1434 if (*buffer == NULL)
1435 *buffer = (gdb_byte *) xmalloc (nfetch * width);
1437 *buffer = (gdb_byte *) xrealloc (*buffer,
1438 (nfetch + bufsize) * width);
1440 bufptr = *buffer + bufsize * width;
1443 /* Read as much as we can. */
1444 nfetch = partial_memory_read (addr, bufptr, nfetch * width, &errcode)
1447 /* Scan this chunk for the null character that terminates the string
1448 to print. If found, we don't need to fetch any more. Note
1449 that bufptr is explicitly left pointing at the next character
1450 after the null character, or at the next character after the end
1453 limit = bufptr + nfetch * width;
1454 while (bufptr < limit)
1458 c = extract_unsigned_integer (bufptr, width, byte_order);
1463 /* We don't care about any error which happened after
1464 the NUL terminator. */
1471 while (errcode == 0 /* no error */
1472 && bufptr - *buffer < fetchlimit * width /* no overrun */
1473 && !found_nul); /* haven't found NUL yet */
1476 { /* Length of string is really 0! */
1477 /* We always allocate *buffer. */
1478 *buffer = bufptr = xmalloc (1);
1482 /* bufptr and addr now point immediately beyond the last byte which we
1483 consider part of the string (including a '\0' which ends the string). */
1484 *bytes_read = bufptr - *buffer;
1488 discard_cleanups (old_chain);
1493 /* Return true if print_wchar can display W without resorting to a
1494 numeric escape, false otherwise. */
1497 wchar_printable (gdb_wchar_t w)
1499 return (gdb_iswprint (w)
1500 || w == LCST ('\a') || w == LCST ('\b')
1501 || w == LCST ('\f') || w == LCST ('\n')
1502 || w == LCST ('\r') || w == LCST ('\t')
1503 || w == LCST ('\v'));
1506 /* A helper function that converts the contents of STRING to wide
1507 characters and then appends them to OUTPUT. */
1510 append_string_as_wide (const char *string,
1511 struct obstack *output)
1513 for (; *string; ++string)
1515 gdb_wchar_t w = gdb_btowc (*string);
1516 obstack_grow (output, &w, sizeof (gdb_wchar_t));
1520 /* Print a wide character W to OUTPUT. ORIG is a pointer to the
1521 original (target) bytes representing the character, ORIG_LEN is the
1522 number of valid bytes. WIDTH is the number of bytes in a base
1523 characters of the type. OUTPUT is an obstack to which wide
1524 characters are emitted. QUOTER is a (narrow) character indicating
1525 the style of quotes surrounding the character to be printed.
1526 NEED_ESCAPE is an in/out flag which is used to track numeric
1527 escapes across calls. */
1530 print_wchar (gdb_wint_t w, const gdb_byte *orig,
1531 int orig_len, int width,
1532 enum bfd_endian byte_order,
1533 struct obstack *output,
1534 int quoter, int *need_escapep)
1536 int need_escape = *need_escapep;
1539 if (gdb_iswprint (w) && (!need_escape || (!gdb_iswdigit (w)
1541 && w != LCST ('9'))))
1543 gdb_wchar_t wchar = w;
1545 if (w == gdb_btowc (quoter) || w == LCST ('\\'))
1546 obstack_grow_wstr (output, LCST ("\\"));
1547 obstack_grow (output, &wchar, sizeof (gdb_wchar_t));
1554 obstack_grow_wstr (output, LCST ("\\a"));
1557 obstack_grow_wstr (output, LCST ("\\b"));
1560 obstack_grow_wstr (output, LCST ("\\f"));
1563 obstack_grow_wstr (output, LCST ("\\n"));
1566 obstack_grow_wstr (output, LCST ("\\r"));
1569 obstack_grow_wstr (output, LCST ("\\t"));
1572 obstack_grow_wstr (output, LCST ("\\v"));
1578 for (i = 0; i + width <= orig_len; i += width)
1583 value = extract_unsigned_integer (&orig[i], width,
1585 /* If the value fits in 3 octal digits, print it that
1586 way. Otherwise, print it as a hex escape. */
1588 sprintf (octal, "\\%.3o", (int) (value & 0777));
1590 sprintf (octal, "\\x%lx", (long) value);
1591 append_string_as_wide (octal, output);
1593 /* If we somehow have extra bytes, print them now. */
1594 while (i < orig_len)
1598 sprintf (octal, "\\%.3o", orig[i] & 0xff);
1599 append_string_as_wide (octal, output);
1610 /* Print the character C on STREAM as part of the contents of a
1611 literal string whose delimiter is QUOTER. ENCODING names the
1615 generic_emit_char (int c, struct type *type, struct ui_file *stream,
1616 int quoter, const char *encoding)
1618 enum bfd_endian byte_order
1619 = gdbarch_byte_order (get_type_arch (type));
1620 struct obstack wchar_buf, output;
1621 struct cleanup *cleanups;
1623 struct wchar_iterator *iter;
1624 int need_escape = 0;
1626 buf = alloca (TYPE_LENGTH (type));
1627 pack_long (buf, type, c);
1629 iter = make_wchar_iterator (buf, TYPE_LENGTH (type),
1630 encoding, TYPE_LENGTH (type));
1631 cleanups = make_cleanup_wchar_iterator (iter);
1633 /* This holds the printable form of the wchar_t data. */
1634 obstack_init (&wchar_buf);
1635 make_cleanup_obstack_free (&wchar_buf);
1641 const gdb_byte *buf;
1643 int print_escape = 1;
1644 enum wchar_iterate_result result;
1646 num_chars = wchar_iterate (iter, &result, &chars, &buf, &buflen);
1651 /* If all characters are printable, print them. Otherwise,
1652 we're going to have to print an escape sequence. We
1653 check all characters because we want to print the target
1654 bytes in the escape sequence, and we don't know character
1655 boundaries there. */
1659 for (i = 0; i < num_chars; ++i)
1660 if (!wchar_printable (chars[i]))
1668 for (i = 0; i < num_chars; ++i)
1669 print_wchar (chars[i], buf, buflen,
1670 TYPE_LENGTH (type), byte_order,
1671 &wchar_buf, quoter, &need_escape);
1675 /* This handles the NUM_CHARS == 0 case as well. */
1677 print_wchar (gdb_WEOF, buf, buflen, TYPE_LENGTH (type),
1678 byte_order, &wchar_buf, quoter, &need_escape);
1681 /* The output in the host encoding. */
1682 obstack_init (&output);
1683 make_cleanup_obstack_free (&output);
1685 convert_between_encodings (INTERMEDIATE_ENCODING, host_charset (),
1686 obstack_base (&wchar_buf),
1687 obstack_object_size (&wchar_buf),
1688 1, &output, translit_char);
1689 obstack_1grow (&output, '\0');
1691 fputs_filtered (obstack_base (&output), stream);
1693 do_cleanups (cleanups);
1696 /* Print the character string STRING, printing at most LENGTH
1697 characters. LENGTH is -1 if the string is nul terminated. TYPE is
1698 the type of each character. OPTIONS holds the printing options;
1699 printing stops early if the number hits print_max; repeat counts
1700 are printed as appropriate. Print ellipses at the end if we had to
1701 stop before printing LENGTH characters, or if FORCE_ELLIPSES.
1702 QUOTE_CHAR is the character to print at each end of the string. If
1703 C_STYLE_TERMINATOR is true, and the last character is 0, then it is
1707 generic_printstr (struct ui_file *stream, struct type *type,
1708 const gdb_byte *string, unsigned int length,
1709 const char *encoding, int force_ellipses,
1710 int quote_char, int c_style_terminator,
1711 const struct value_print_options *options)
1713 enum bfd_endian byte_order = gdbarch_byte_order (get_type_arch (type));
1715 unsigned int things_printed = 0;
1718 int width = TYPE_LENGTH (type);
1719 struct obstack wchar_buf, output;
1720 struct cleanup *cleanup;
1721 struct wchar_iterator *iter;
1723 int need_escape = 0;
1724 gdb_wchar_t wide_quote_char = gdb_btowc (quote_char);
1728 unsigned long current_char = 1;
1730 for (i = 0; current_char; ++i)
1733 current_char = extract_unsigned_integer (string + i * width,
1739 /* If the string was not truncated due to `set print elements', and
1740 the last byte of it is a null, we don't print that, in
1741 traditional C style. */
1742 if (c_style_terminator
1745 && (extract_unsigned_integer (string + (length - 1) * width,
1746 width, byte_order) == 0))
1751 fputs_filtered ("\"\"", stream);
1755 /* Arrange to iterate over the characters, in wchar_t form. */
1756 iter = make_wchar_iterator (string, length * width, encoding, width);
1757 cleanup = make_cleanup_wchar_iterator (iter);
1759 /* WCHAR_BUF is the obstack we use to represent the string in
1761 obstack_init (&wchar_buf);
1762 make_cleanup_obstack_free (&wchar_buf);
1764 while (!finished && things_printed < options->print_max)
1767 enum wchar_iterate_result result;
1769 const gdb_byte *buf;
1776 obstack_grow_wstr (&wchar_buf, LCST (", "));
1780 num_chars = wchar_iterate (iter, &result, &chars, &buf, &buflen);
1781 /* We only look at repetitions when we were able to convert a
1782 single character in isolation. This makes the code simpler
1783 and probably does the sensible thing in the majority of
1785 while (num_chars == 1 && things_printed < options->print_max)
1787 /* Count the number of repetitions. */
1788 unsigned int reps = 0;
1789 gdb_wchar_t current_char = chars[0];
1790 const gdb_byte *orig_buf = buf;
1791 int orig_len = buflen;
1795 obstack_grow_wstr (&wchar_buf, LCST (", "));
1799 while (num_chars == 1 && current_char == chars[0])
1801 num_chars = wchar_iterate (iter, &result, &chars,
1806 /* Emit CURRENT_CHAR according to the repetition count and
1808 if (reps > options->repeat_count_threshold)
1812 if (options->inspect_it)
1813 obstack_grow_wstr (&wchar_buf, LCST ("\\"));
1814 obstack_grow (&wchar_buf, &wide_quote_char,
1815 sizeof (gdb_wchar_t));
1816 obstack_grow_wstr (&wchar_buf, LCST (", "));
1819 obstack_grow_wstr (&wchar_buf, LCST ("'"));
1821 print_wchar (current_char, orig_buf, orig_len, width,
1822 byte_order, &wchar_buf, '\'', &need_escape);
1823 obstack_grow_wstr (&wchar_buf, LCST ("'"));
1825 /* Painful gyrations. */
1827 char *s = xstrprintf (_(" <repeats %u times>"), reps);
1829 for (j = 0; s[j]; ++j)
1831 gdb_wchar_t w = gdb_btowc (s[j]);
1832 obstack_grow (&wchar_buf, &w, sizeof (gdb_wchar_t));
1836 things_printed += options->repeat_count_threshold;
1841 /* Saw the character one or more times, but fewer than
1842 the repetition threshold. */
1845 if (options->inspect_it)
1846 obstack_grow_wstr (&wchar_buf, LCST ("\\"));
1847 obstack_grow (&wchar_buf, &wide_quote_char,
1848 sizeof (gdb_wchar_t));
1855 print_wchar (current_char, orig_buf,
1857 byte_order, &wchar_buf,
1858 quote_char, &need_escape);
1864 /* NUM_CHARS and the other outputs from wchar_iterate are valid
1865 here regardless of which branch was taken above. */
1875 case wchar_iterate_invalid:
1878 if (options->inspect_it)
1879 obstack_grow_wstr (&wchar_buf, LCST ("\\"));
1880 obstack_grow (&wchar_buf, &wide_quote_char,
1881 sizeof (gdb_wchar_t));
1885 print_wchar (gdb_WEOF, buf, buflen, width, byte_order,
1886 &wchar_buf, quote_char, &need_escape);
1889 case wchar_iterate_incomplete:
1892 if (options->inspect_it)
1893 obstack_grow_wstr (&wchar_buf, LCST ("\\"));
1894 obstack_grow (&wchar_buf, &wide_quote_char,
1895 sizeof (gdb_wchar_t));
1896 obstack_grow_wstr (&wchar_buf, LCST (","));
1899 obstack_grow_wstr (&wchar_buf,
1900 LCST (" <incomplete sequence "));
1901 print_wchar (gdb_WEOF, buf, buflen, width,
1902 byte_order, &wchar_buf,
1904 obstack_grow_wstr (&wchar_buf, LCST (">"));
1910 /* Terminate the quotes if necessary. */
1913 if (options->inspect_it)
1914 obstack_grow_wstr (&wchar_buf, LCST ("\\"));
1915 obstack_grow (&wchar_buf, &wide_quote_char,
1916 sizeof (gdb_wchar_t));
1919 if (force_ellipses || !finished)
1920 obstack_grow_wstr (&wchar_buf, LCST ("..."));
1922 /* OUTPUT is where we collect `char's for printing. */
1923 obstack_init (&output);
1924 make_cleanup_obstack_free (&output);
1926 convert_between_encodings (INTERMEDIATE_ENCODING, host_charset (),
1927 obstack_base (&wchar_buf),
1928 obstack_object_size (&wchar_buf),
1929 1, &output, translit_char);
1930 obstack_1grow (&output, '\0');
1932 fputs_filtered (obstack_base (&output), stream);
1934 do_cleanups (cleanup);
1937 /* Print a string from the inferior, starting at ADDR and printing up to LEN
1938 characters, of WIDTH bytes a piece, to STREAM. If LEN is -1, printing
1939 stops at the first null byte, otherwise printing proceeds (including null
1940 bytes) until either print_max or LEN characters have been printed,
1941 whichever is smaller. ENCODING is the name of the string's
1942 encoding. It can be NULL, in which case the target encoding is
1946 val_print_string (struct type *elttype, const char *encoding,
1947 CORE_ADDR addr, int len,
1948 struct ui_file *stream,
1949 const struct value_print_options *options)
1951 int force_ellipsis = 0; /* Force ellipsis to be printed if nonzero. */
1952 int errcode; /* Errno returned from bad reads. */
1953 int found_nul; /* Non-zero if we found the nul char. */
1954 unsigned int fetchlimit; /* Maximum number of chars to print. */
1956 gdb_byte *buffer = NULL; /* Dynamically growable fetch buffer. */
1957 struct cleanup *old_chain = NULL; /* Top of the old cleanup chain. */
1958 struct gdbarch *gdbarch = get_type_arch (elttype);
1959 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
1960 int width = TYPE_LENGTH (elttype);
1962 /* First we need to figure out the limit on the number of characters we are
1963 going to attempt to fetch and print. This is actually pretty simple. If
1964 LEN >= zero, then the limit is the minimum of LEN and print_max. If
1965 LEN is -1, then the limit is print_max. This is true regardless of
1966 whether print_max is zero, UINT_MAX (unlimited), or something in between,
1967 because finding the null byte (or available memory) is what actually
1968 limits the fetch. */
1970 fetchlimit = (len == -1 ? options->print_max : min (len,
1971 options->print_max));
1973 errcode = read_string (addr, len, width, fetchlimit, byte_order,
1974 &buffer, &bytes_read);
1975 old_chain = make_cleanup (xfree, buffer);
1979 /* We now have either successfully filled the buffer to fetchlimit,
1980 or terminated early due to an error or finding a null char when
1983 /* Determine found_nul by looking at the last character read. */
1984 found_nul = extract_unsigned_integer (buffer + bytes_read - width, width,
1986 if (len == -1 && !found_nul)
1990 /* We didn't find a NUL terminator we were looking for. Attempt
1991 to peek at the next character. If not successful, or it is not
1992 a null byte, then force ellipsis to be printed. */
1994 peekbuf = (gdb_byte *) alloca (width);
1996 if (target_read_memory (addr, peekbuf, width) == 0
1997 && extract_unsigned_integer (peekbuf, width, byte_order) != 0)
2000 else if ((len >= 0 && errcode != 0) || (len > bytes_read / width))
2002 /* Getting an error when we have a requested length, or fetching less
2003 than the number of characters actually requested, always make us
2008 /* If we get an error before fetching anything, don't print a string.
2009 But if we fetch something and then get an error, print the string
2010 and then the error message. */
2011 if (errcode == 0 || bytes_read > 0)
2013 if (options->addressprint)
2015 fputs_filtered (" ", stream);
2017 LA_PRINT_STRING (stream, elttype, buffer, bytes_read / width,
2018 encoding, force_ellipsis, options);
2025 fprintf_filtered (stream, " <Address ");
2026 fputs_filtered (paddress (gdbarch, addr), stream);
2027 fprintf_filtered (stream, " out of bounds>");
2031 fprintf_filtered (stream, " <Error reading address ");
2032 fputs_filtered (paddress (gdbarch, addr), stream);
2033 fprintf_filtered (stream, ": %s>", safe_strerror (errcode));
2038 do_cleanups (old_chain);
2040 return (bytes_read / width);
2044 /* The 'set input-radix' command writes to this auxiliary variable.
2045 If the requested radix is valid, INPUT_RADIX is updated; otherwise,
2046 it is left unchanged. */
2048 static unsigned input_radix_1 = 10;
2050 /* Validate an input or output radix setting, and make sure the user
2051 knows what they really did here. Radix setting is confusing, e.g.
2052 setting the input radix to "10" never changes it! */
2055 set_input_radix (char *args, int from_tty, struct cmd_list_element *c)
2057 set_input_radix_1 (from_tty, input_radix_1);
2061 set_input_radix_1 (int from_tty, unsigned radix)
2063 /* We don't currently disallow any input radix except 0 or 1, which don't
2064 make any mathematical sense. In theory, we can deal with any input
2065 radix greater than 1, even if we don't have unique digits for every
2066 value from 0 to radix-1, but in practice we lose on large radix values.
2067 We should either fix the lossage or restrict the radix range more.
2072 input_radix_1 = input_radix;
2073 error (_("Nonsense input radix ``decimal %u''; input radix unchanged."),
2076 input_radix_1 = input_radix = radix;
2079 printf_filtered (_("Input radix now set to "
2080 "decimal %u, hex %x, octal %o.\n"),
2081 radix, radix, radix);
2085 /* The 'set output-radix' command writes to this auxiliary variable.
2086 If the requested radix is valid, OUTPUT_RADIX is updated,
2087 otherwise, it is left unchanged. */
2089 static unsigned output_radix_1 = 10;
2092 set_output_radix (char *args, int from_tty, struct cmd_list_element *c)
2094 set_output_radix_1 (from_tty, output_radix_1);
2098 set_output_radix_1 (int from_tty, unsigned radix)
2100 /* Validate the radix and disallow ones that we aren't prepared to
2101 handle correctly, leaving the radix unchanged. */
2105 user_print_options.output_format = 'x'; /* hex */
2108 user_print_options.output_format = 0; /* decimal */
2111 user_print_options.output_format = 'o'; /* octal */
2114 output_radix_1 = output_radix;
2115 error (_("Unsupported output radix ``decimal %u''; "
2116 "output radix unchanged."),
2119 output_radix_1 = output_radix = radix;
2122 printf_filtered (_("Output radix now set to "
2123 "decimal %u, hex %x, octal %o.\n"),
2124 radix, radix, radix);
2128 /* Set both the input and output radix at once. Try to set the output radix
2129 first, since it has the most restrictive range. An radix that is valid as
2130 an output radix is also valid as an input radix.
2132 It may be useful to have an unusual input radix. If the user wishes to
2133 set an input radix that is not valid as an output radix, he needs to use
2134 the 'set input-radix' command. */
2137 set_radix (char *arg, int from_tty)
2141 radix = (arg == NULL) ? 10 : parse_and_eval_long (arg);
2142 set_output_radix_1 (0, radix);
2143 set_input_radix_1 (0, radix);
2146 printf_filtered (_("Input and output radices now set to "
2147 "decimal %u, hex %x, octal %o.\n"),
2148 radix, radix, radix);
2152 /* Show both the input and output radices. */
2155 show_radix (char *arg, int from_tty)
2159 if (input_radix == output_radix)
2161 printf_filtered (_("Input and output radices set to "
2162 "decimal %u, hex %x, octal %o.\n"),
2163 input_radix, input_radix, input_radix);
2167 printf_filtered (_("Input radix set to decimal "
2168 "%u, hex %x, octal %o.\n"),
2169 input_radix, input_radix, input_radix);
2170 printf_filtered (_("Output radix set to decimal "
2171 "%u, hex %x, octal %o.\n"),
2172 output_radix, output_radix, output_radix);
2179 set_print (char *arg, int from_tty)
2182 "\"set print\" must be followed by the name of a print subcommand.\n");
2183 help_list (setprintlist, "set print ", -1, gdb_stdout);
2187 show_print (char *args, int from_tty)
2189 cmd_show_list (showprintlist, from_tty, "");
2193 _initialize_valprint (void)
2195 add_prefix_cmd ("print", no_class, set_print,
2196 _("Generic command for setting how things print."),
2197 &setprintlist, "set print ", 0, &setlist);
2198 add_alias_cmd ("p", "print", no_class, 1, &setlist);
2199 /* Prefer set print to set prompt. */
2200 add_alias_cmd ("pr", "print", no_class, 1, &setlist);
2202 add_prefix_cmd ("print", no_class, show_print,
2203 _("Generic command for showing print settings."),
2204 &showprintlist, "show print ", 0, &showlist);
2205 add_alias_cmd ("p", "print", no_class, 1, &showlist);
2206 add_alias_cmd ("pr", "print", no_class, 1, &showlist);
2208 add_setshow_uinteger_cmd ("elements", no_class,
2209 &user_print_options.print_max, _("\
2210 Set limit on string chars or array elements to print."), _("\
2211 Show limit on string chars or array elements to print."), _("\
2212 \"set print elements 0\" causes there to be no limit."),
2215 &setprintlist, &showprintlist);
2217 add_setshow_boolean_cmd ("null-stop", no_class,
2218 &user_print_options.stop_print_at_null, _("\
2219 Set printing of char arrays to stop at first null char."), _("\
2220 Show printing of char arrays to stop at first null char."), NULL,
2222 show_stop_print_at_null,
2223 &setprintlist, &showprintlist);
2225 add_setshow_uinteger_cmd ("repeats", no_class,
2226 &user_print_options.repeat_count_threshold, _("\
2227 Set threshold for repeated print elements."), _("\
2228 Show threshold for repeated print elements."), _("\
2229 \"set print repeats 0\" causes all elements to be individually printed."),
2231 show_repeat_count_threshold,
2232 &setprintlist, &showprintlist);
2234 add_setshow_boolean_cmd ("pretty", class_support,
2235 &user_print_options.prettyprint_structs, _("\
2236 Set prettyprinting of structures."), _("\
2237 Show prettyprinting of structures."), NULL,
2239 show_prettyprint_structs,
2240 &setprintlist, &showprintlist);
2242 add_setshow_boolean_cmd ("union", class_support,
2243 &user_print_options.unionprint, _("\
2244 Set printing of unions interior to structures."), _("\
2245 Show printing of unions interior to structures."), NULL,
2248 &setprintlist, &showprintlist);
2250 add_setshow_boolean_cmd ("array", class_support,
2251 &user_print_options.prettyprint_arrays, _("\
2252 Set prettyprinting of arrays."), _("\
2253 Show prettyprinting of arrays."), NULL,
2255 show_prettyprint_arrays,
2256 &setprintlist, &showprintlist);
2258 add_setshow_boolean_cmd ("address", class_support,
2259 &user_print_options.addressprint, _("\
2260 Set printing of addresses."), _("\
2261 Show printing of addresses."), NULL,
2264 &setprintlist, &showprintlist);
2266 add_setshow_zuinteger_cmd ("input-radix", class_support, &input_radix_1,
2268 Set default input radix for entering numbers."), _("\
2269 Show default input radix for entering numbers."), NULL,
2272 &setlist, &showlist);
2274 add_setshow_zuinteger_cmd ("output-radix", class_support, &output_radix_1,
2276 Set default output radix for printing of values."), _("\
2277 Show default output radix for printing of values."), NULL,
2280 &setlist, &showlist);
2282 /* The "set radix" and "show radix" commands are special in that
2283 they are like normal set and show commands but allow two normally
2284 independent variables to be either set or shown with a single
2285 command. So the usual deprecated_add_set_cmd() and [deleted]
2286 add_show_from_set() commands aren't really appropriate. */
2287 /* FIXME: i18n: With the new add_setshow_integer command, that is no
2288 longer true - show can display anything. */
2289 add_cmd ("radix", class_support, set_radix, _("\
2290 Set default input and output number radices.\n\
2291 Use 'set input-radix' or 'set output-radix' to independently set each.\n\
2292 Without an argument, sets both radices back to the default value of 10."),
2294 add_cmd ("radix", class_support, show_radix, _("\
2295 Show the default input and output number radices.\n\
2296 Use 'show input-radix' or 'show output-radix' to independently show each."),
2299 add_setshow_boolean_cmd ("array-indexes", class_support,
2300 &user_print_options.print_array_indexes, _("\
2301 Set printing of array indexes."), _("\
2302 Show printing of array indexes"), NULL, NULL, show_print_array_indexes,
2303 &setprintlist, &showprintlist);