1 /* Print values for GDB, the GNU debugger.
3 Copyright 1986, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
4 1996, 1997, 1998, 1999, 2000, 2001, 2002 Free Software Foundation,
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 59 Temple Place - Suite 330,
22 Boston, MA 02111-1307, USA. */
25 #include "gdb_string.h"
35 #include "floatformat.h"
40 /* Prototypes for local functions */
42 static int partial_memory_read (CORE_ADDR memaddr
, char *myaddr
,
43 int len
, int *errnoptr
);
45 static void print_hex_chars (struct ui_file
*, unsigned char *,
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 /* Maximum number of chars to print for a string pointer value or vector
67 contents, or UINT_MAX for no limit. Note that "set print elements 0"
68 stores UINT_MAX in print_max, which displays in a show command as
71 unsigned int print_max
;
72 #define PRINT_MAX_DEFAULT 200 /* Start print_max off at this value. */
74 /* Default input and output radixes, and output format letter. */
76 unsigned input_radix
= 10;
77 unsigned output_radix
= 10;
78 int output_format
= 0;
80 /* Print repeat counts if there are more than this many repetitions of an
81 element in an array. Referenced by the low level language dependent
84 unsigned int repeat_count_threshold
= 10;
86 /* If nonzero, stops printing of char arrays at first null. */
88 int stop_print_at_null
;
90 /* Controls pretty printing of structures. */
92 int prettyprint_structs
;
94 /* Controls pretty printing of arrays. */
96 int prettyprint_arrays
;
98 /* If nonzero, causes unions inside structures or other unions to be
101 int unionprint
; /* Controls printing of nested unions. */
103 /* If nonzero, causes machine addresses to be printed in certain contexts. */
105 int addressprint
; /* Controls printing of machine addresses */
108 /* Print data of type TYPE located at VALADDR (within GDB), which came from
109 the inferior at address ADDRESS, onto stdio stream STREAM according to
110 FORMAT (a letter, or 0 for natural format using TYPE).
112 If DEREF_REF is nonzero, then dereference references, otherwise just print
115 The PRETTY parameter controls prettyprinting.
117 If the data are a string pointer, returns the number of string characters
120 FIXME: The data at VALADDR is in target byte order. If gdb is ever
121 enhanced to be able to debug more than the single target it was compiled
122 for (specific CPU type and thus specific target byte ordering), then
123 either the print routines are going to have to take this into account,
124 or the data is going to have to be passed into here already converted
125 to the host byte ordering, whichever is more convenient. */
129 val_print (struct type
*type
, char *valaddr
, int embedded_offset
,
130 CORE_ADDR address
, struct ui_file
*stream
, int format
, int deref_ref
,
131 int recurse
, enum val_prettyprint pretty
)
133 struct type
*real_type
= check_typedef (type
);
134 if (pretty
== Val_pretty_default
)
136 pretty
= prettyprint_structs
? Val_prettyprint
: Val_no_prettyprint
;
141 /* Ensure that the type is complete and not just a stub. If the type is
142 only a stub and we can't find and substitute its complete type, then
143 print appropriate string and return. */
145 if (TYPE_STUB (real_type
))
147 fprintf_filtered (stream
, "<incomplete type>");
152 return (LA_VAL_PRINT (type
, valaddr
, embedded_offset
, address
,
153 stream
, format
, deref_ref
, recurse
, pretty
));
156 /* Print the value VAL in C-ish syntax on stream STREAM.
157 FORMAT is a format-letter, or 0 for print in natural format of data type.
158 If the object printed is a string pointer, returns
159 the number of string bytes printed. */
162 value_print (struct value
*val
, struct ui_file
*stream
, int format
,
163 enum val_prettyprint pretty
)
167 printf_filtered ("<address of value unknown>");
170 if (VALUE_OPTIMIZED_OUT (val
))
172 printf_filtered ("<value optimized out>");
175 return LA_VALUE_PRINT (val
, stream
, format
, pretty
);
178 /* Called by various <lang>_val_print routines to print
179 TYPE_CODE_INT's. TYPE is the type. VALADDR is the address of the
180 value. STREAM is where to print the value. */
183 val_print_type_code_int (struct type
*type
, char *valaddr
,
184 struct ui_file
*stream
)
186 if (TYPE_LENGTH (type
) > sizeof (LONGEST
))
190 if (TYPE_UNSIGNED (type
)
191 && extract_long_unsigned_integer (valaddr
, TYPE_LENGTH (type
),
194 print_longest (stream
, 'u', 0, val
);
198 /* Signed, or we couldn't turn an unsigned value into a
199 LONGEST. For signed values, one could assume two's
200 complement (a reasonable assumption, I think) and do
202 print_hex_chars (stream
, (unsigned char *) valaddr
,
208 print_longest (stream
, TYPE_UNSIGNED (type
) ? 'u' : 'd', 0,
209 unpack_long (type
, valaddr
));
213 /* Print a number according to FORMAT which is one of d,u,x,o,b,h,w,g.
214 The raison d'etre of this function is to consolidate printing of
215 LONG_LONG's into this one function. Some platforms have long longs but
216 don't have a printf() that supports "ll" in the format string. We handle
217 these by seeing if the number is representable as either a signed or
218 unsigned long, depending upon what format is desired, and if not we just
219 bail out and print the number in hex.
221 The format chars b,h,w,g are from print_scalar_formatted(). If USE_LOCAL,
222 format it according to the current language (this should be used for most
223 integers which GDB prints, the exception is things like protocols where
224 the format of the integer is a protocol thing, not a user-visible thing).
227 #if defined (CC_HAS_LONG_LONG) && !defined (PRINTF_HAS_LONG_LONG)
228 static void print_decimal (struct ui_file
* stream
, char *sign
,
229 int use_local
, ULONGEST val_ulong
);
231 print_decimal (struct ui_file
*stream
, char *sign
, int use_local
,
234 unsigned long temp
[3];
238 temp
[i
] = val_ulong
% (1000 * 1000 * 1000);
239 val_ulong
/= (1000 * 1000 * 1000);
242 while (val_ulong
!= 0 && i
< (sizeof (temp
) / sizeof (temp
[0])));
246 fprintf_filtered (stream
, "%s%lu",
250 fprintf_filtered (stream
, "%s%lu%09lu",
251 sign
, temp
[1], temp
[0]);
254 fprintf_filtered (stream
, "%s%lu%09lu%09lu",
255 sign
, temp
[2], temp
[1], temp
[0]);
258 internal_error (__FILE__
, __LINE__
, "failed internal consistency check");
265 print_longest (struct ui_file
*stream
, int format
, int use_local
,
268 #if defined (CC_HAS_LONG_LONG) && !defined (PRINTF_HAS_LONG_LONG)
269 if (sizeof (long) < sizeof (LONGEST
))
275 /* Print a signed value, that doesn't fit in a long */
276 if ((long) val_long
!= val_long
)
279 print_decimal (stream
, "-", use_local
, -val_long
);
281 print_decimal (stream
, "", use_local
, val_long
);
288 /* Print an unsigned value, that doesn't fit in a long */
289 if ((unsigned long) val_long
!= (ULONGEST
) val_long
)
291 print_decimal (stream
, "", use_local
, val_long
);
302 /* Print as unsigned value, must fit completely in unsigned long */
304 unsigned long temp
= val_long
;
305 if (temp
!= val_long
)
307 /* Urk, can't represent value in long so print in hex.
308 Do shift in two operations so that if sizeof (long)
309 == sizeof (LONGEST) we can avoid warnings from
310 picky compilers about shifts >= the size of the
312 unsigned long vbot
= (unsigned long) val_long
;
313 LONGEST temp
= (val_long
>> (sizeof (long) * HOST_CHAR_BIT
- 1));
314 unsigned long vtop
= temp
>> 1;
315 fprintf_filtered (stream
, "0x%lx%08lx", vtop
, vbot
);
324 #if defined (CC_HAS_LONG_LONG) && defined (PRINTF_HAS_LONG_LONG)
328 fprintf_filtered (stream
,
329 use_local
? local_decimal_format_custom ("ll")
331 (long long) val_long
);
334 fprintf_filtered (stream
, "%llu", (long long) val_long
);
337 fprintf_filtered (stream
,
338 use_local
? local_hex_format_custom ("ll")
340 (unsigned long long) val_long
);
343 fprintf_filtered (stream
,
344 use_local
? local_octal_format_custom ("ll")
346 (unsigned long long) val_long
);
349 fprintf_filtered (stream
, local_hex_format_custom ("02ll"), val_long
);
352 fprintf_filtered (stream
, local_hex_format_custom ("04ll"), val_long
);
355 fprintf_filtered (stream
, local_hex_format_custom ("08ll"), val_long
);
358 fprintf_filtered (stream
, local_hex_format_custom ("016ll"), val_long
);
361 internal_error (__FILE__
, __LINE__
, "failed internal consistency check");
363 #else /* !CC_HAS_LONG_LONG || !PRINTF_HAS_LONG_LONG */
364 /* In the following it is important to coerce (val_long) to a long. It does
365 nothing if !LONG_LONG, but it will chop off the top half (which we know
366 we can ignore) if the host supports long longs. */
371 fprintf_filtered (stream
,
372 use_local
? local_decimal_format_custom ("l")
377 fprintf_filtered (stream
, "%lu", (unsigned long) val_long
);
380 fprintf_filtered (stream
,
381 use_local
? local_hex_format_custom ("l")
383 (unsigned long) val_long
);
386 fprintf_filtered (stream
,
387 use_local
? local_octal_format_custom ("l")
389 (unsigned long) val_long
);
392 fprintf_filtered (stream
, local_hex_format_custom ("02l"),
393 (unsigned long) val_long
);
396 fprintf_filtered (stream
, local_hex_format_custom ("04l"),
397 (unsigned long) val_long
);
400 fprintf_filtered (stream
, local_hex_format_custom ("08l"),
401 (unsigned long) val_long
);
404 fprintf_filtered (stream
, local_hex_format_custom ("016l"),
405 (unsigned long) val_long
);
408 internal_error (__FILE__
, __LINE__
, "failed internal consistency check");
410 #endif /* CC_HAS_LONG_LONG || PRINTF_HAS_LONG_LONG */
413 /* This used to be a macro, but I don't think it is called often enough
414 to merit such treatment. */
415 /* Convert a LONGEST to an int. This is used in contexts (e.g. number of
416 arguments to a function, number in a value history, register number, etc.)
417 where the value must not be larger than can fit in an int. */
420 longest_to_int (LONGEST arg
)
422 /* Let the compiler do the work */
423 int rtnval
= (int) arg
;
425 /* Check for overflows or underflows */
426 if (sizeof (LONGEST
) > sizeof (int))
430 error ("Value out of range.");
436 /* Print a floating point value of type TYPE (not always a
437 TYPE_CODE_FLT), pointed to in GDB by VALADDR, on STREAM. */
440 print_floating (char *valaddr
, struct type
*type
, struct ui_file
*stream
)
444 const struct floatformat
*fmt
= NULL
;
445 unsigned len
= TYPE_LENGTH (type
);
447 /* If it is a floating-point, check for obvious problems. */
448 if (TYPE_CODE (type
) == TYPE_CODE_FLT
)
449 fmt
= floatformat_from_type (type
);
450 if (fmt
!= NULL
&& floatformat_is_nan (fmt
, valaddr
))
452 if (floatformat_is_negative (fmt
, valaddr
))
453 fprintf_filtered (stream
, "-");
454 fprintf_filtered (stream
, "nan(");
455 fputs_filtered (local_hex_format_prefix (), stream
);
456 fputs_filtered (floatformat_mantissa (fmt
, valaddr
), stream
);
457 fputs_filtered (local_hex_format_suffix (), stream
);
458 fprintf_filtered (stream
, ")");
462 /* NOTE: cagney/2002-01-15: The TYPE passed into print_floating()
463 isn't necessarily a TYPE_CODE_FLT. Consequently, unpack_double
464 needs to be used as that takes care of any necessary type
465 conversions. Such conversions are of course direct to DOUBLEST
466 and disregard any possible target floating point limitations.
467 For instance, a u64 would be converted and displayed exactly on a
468 host with 80 bit DOUBLEST but with loss of information on a host
469 with 64 bit DOUBLEST. */
471 doub
= unpack_double (type
, valaddr
, &inv
);
474 fprintf_filtered (stream
, "<invalid float value>");
478 /* FIXME: kettenis/2001-01-20: The following code makes too much
479 assumptions about the host and target floating point format. */
481 /* NOTE: cagney/2002-02-03: Since the TYPE of what was passed in may
482 not necessarially be a TYPE_CODE_FLT, the below ignores that and
483 instead uses the type's length to determine the precision of the
484 floating-point value being printed. */
486 if (len
< sizeof (double))
487 fprintf_filtered (stream
, "%.9g", (double) doub
);
488 else if (len
== sizeof (double))
489 fprintf_filtered (stream
, "%.17g", (double) doub
);
491 #ifdef PRINTF_HAS_LONG_DOUBLE
492 fprintf_filtered (stream
, "%.35Lg", doub
);
494 /* This at least wins with values that are representable as
496 fprintf_filtered (stream
, "%.17g", (double) doub
);
501 print_binary_chars (struct ui_file
*stream
, unsigned char *valaddr
,
505 #define BITS_IN_BYTES 8
511 /* Declared "int" so it will be signed.
512 * This ensures that right shift will shift in zeros.
514 const int mask
= 0x080;
516 /* FIXME: We should be not printing leading zeroes in most cases. */
518 fputs_filtered (local_binary_format_prefix (), stream
);
519 if (TARGET_BYTE_ORDER
== BFD_ENDIAN_BIG
)
525 /* Every byte has 8 binary characters; peel off
526 * and print from the MSB end.
528 for (i
= 0; i
< (BITS_IN_BYTES
* sizeof (*p
)); i
++)
530 if (*p
& (mask
>> i
))
535 fprintf_filtered (stream
, "%1d", b
);
541 for (p
= valaddr
+ len
- 1;
545 for (i
= 0; i
< (BITS_IN_BYTES
* sizeof (*p
)); i
++)
547 if (*p
& (mask
>> i
))
552 fprintf_filtered (stream
, "%1d", b
);
556 fputs_filtered (local_binary_format_suffix (), stream
);
559 /* VALADDR points to an integer of LEN bytes.
560 * Print it in octal on stream or format it in buf.
563 print_octal_chars (struct ui_file
*stream
, unsigned char *valaddr
, unsigned len
)
566 unsigned char octa1
, octa2
, octa3
, carry
;
569 /* FIXME: We should be not printing leading zeroes in most cases. */
572 /* Octal is 3 bits, which doesn't fit. Yuk. So we have to track
573 * the extra bits, which cycle every three bytes:
577 * bit number 123 456 78 | 9 012 345 6 | 78 901 234 | 567 890 12 |
579 * Octal side: 0 1 carry 3 4 carry ...
581 * Cycle number: 0 1 2
583 * But of course we are printing from the high side, so we have to
584 * figure out where in the cycle we are so that we end up with no
585 * left over bits at the end.
587 #define BITS_IN_OCTAL 3
588 #define HIGH_ZERO 0340
589 #define LOW_ZERO 0016
590 #define CARRY_ZERO 0003
591 #define HIGH_ONE 0200
594 #define CARRY_ONE 0001
595 #define HIGH_TWO 0300
599 /* For 32 we start in cycle 2, with two bits and one bit carry;
600 * for 64 in cycle in cycle 1, with one bit and a two bit carry.
602 cycle
= (len
* BITS_IN_BYTES
) % BITS_IN_OCTAL
;
605 fputs_filtered (local_octal_format_prefix (), stream
);
606 if (TARGET_BYTE_ORDER
== BFD_ENDIAN_BIG
)
615 /* No carry in, carry out two bits.
617 octa1
= (HIGH_ZERO
& *p
) >> 5;
618 octa2
= (LOW_ZERO
& *p
) >> 2;
619 carry
= (CARRY_ZERO
& *p
);
620 fprintf_filtered (stream
, "%o", octa1
);
621 fprintf_filtered (stream
, "%o", octa2
);
625 /* Carry in two bits, carry out one bit.
627 octa1
= (carry
<< 1) | ((HIGH_ONE
& *p
) >> 7);
628 octa2
= (MID_ONE
& *p
) >> 4;
629 octa3
= (LOW_ONE
& *p
) >> 1;
630 carry
= (CARRY_ONE
& *p
);
631 fprintf_filtered (stream
, "%o", octa1
);
632 fprintf_filtered (stream
, "%o", octa2
);
633 fprintf_filtered (stream
, "%o", octa3
);
637 /* Carry in one bit, no carry out.
639 octa1
= (carry
<< 2) | ((HIGH_TWO
& *p
) >> 6);
640 octa2
= (MID_TWO
& *p
) >> 3;
641 octa3
= (LOW_TWO
& *p
);
643 fprintf_filtered (stream
, "%o", octa1
);
644 fprintf_filtered (stream
, "%o", octa2
);
645 fprintf_filtered (stream
, "%o", octa3
);
649 error ("Internal error in octal conversion;");
653 cycle
= cycle
% BITS_IN_OCTAL
;
658 for (p
= valaddr
+ len
- 1;
665 /* Carry out, no carry in */
666 octa1
= (HIGH_ZERO
& *p
) >> 5;
667 octa2
= (LOW_ZERO
& *p
) >> 2;
668 carry
= (CARRY_ZERO
& *p
);
669 fprintf_filtered (stream
, "%o", octa1
);
670 fprintf_filtered (stream
, "%o", octa2
);
674 /* Carry in, carry out */
675 octa1
= (carry
<< 1) | ((HIGH_ONE
& *p
) >> 7);
676 octa2
= (MID_ONE
& *p
) >> 4;
677 octa3
= (LOW_ONE
& *p
) >> 1;
678 carry
= (CARRY_ONE
& *p
);
679 fprintf_filtered (stream
, "%o", octa1
);
680 fprintf_filtered (stream
, "%o", octa2
);
681 fprintf_filtered (stream
, "%o", octa3
);
685 /* Carry in, no carry out */
686 octa1
= (carry
<< 2) | ((HIGH_TWO
& *p
) >> 6);
687 octa2
= (MID_TWO
& *p
) >> 3;
688 octa3
= (LOW_TWO
& *p
);
690 fprintf_filtered (stream
, "%o", octa1
);
691 fprintf_filtered (stream
, "%o", octa2
);
692 fprintf_filtered (stream
, "%o", octa3
);
696 error ("Internal error in octal conversion;");
700 cycle
= cycle
% BITS_IN_OCTAL
;
704 fputs_filtered (local_octal_format_suffix (), stream
);
707 /* VALADDR points to an integer of LEN bytes.
708 * Print it in decimal on stream or format it in buf.
711 print_decimal_chars (struct ui_file
*stream
, unsigned char *valaddr
,
715 #define TWO_TO_FOURTH 16
716 #define CARRY_OUT( x ) ((x) / TEN) /* extend char to int */
717 #define CARRY_LEFT( x ) ((x) % TEN)
718 #define SHIFT( x ) ((x) << 4)
720 ((TARGET_BYTE_ORDER == BFD_ENDIAN_BIG) ? valaddr : valaddr + len - 1)
722 ((TARGET_BYTE_ORDER == BFD_ENDIAN_BIG) ? (p < valaddr + len) : (p >= valaddr))
724 ((TARGET_BYTE_ORDER == BFD_ENDIAN_BIG) ? p++ : p-- )
725 #define LOW_NIBBLE( x ) ( (x) & 0x00F)
726 #define HIGH_NIBBLE( x ) (((x) & 0x0F0) >> 4)
729 unsigned char *digits
;
732 int i
, j
, decimal_digits
;
736 /* Base-ten number is less than twice as many digits
737 * as the base 16 number, which is 2 digits per byte.
739 decimal_len
= len
* 2 * 2;
740 digits
= xmalloc (decimal_len
);
742 for (i
= 0; i
< decimal_len
; i
++)
747 fputs_filtered (local_decimal_format_prefix (), stream
);
749 /* Ok, we have an unknown number of bytes of data to be printed in
752 * Given a hex number (in nibbles) as XYZ, we start by taking X and
753 * decemalizing it as "x1 x2" in two decimal nibbles. Then we multiply
754 * the nibbles by 16, add Y and re-decimalize. Repeat with Z.
756 * The trick is that "digits" holds a base-10 number, but sometimes
757 * the individual digits are > 10.
759 * Outer loop is per nibble (hex digit) of input, from MSD end to
762 decimal_digits
= 0; /* Number of decimal digits so far */
768 * Multiply current base-ten number by 16 in place.
769 * Each digit was between 0 and 9, now is between
772 for (j
= 0; j
< decimal_digits
; j
++)
774 digits
[j
] = SHIFT (digits
[j
]);
777 /* Take the next nibble off the input and add it to what
778 * we've got in the LSB position. Bottom 'digit' is now
781 * "flip" is used to run this loop twice for each byte.
787 digits
[0] += HIGH_NIBBLE (*p
);
792 /* Take low nibble and bump our pointer "p".
794 digits
[0] += LOW_NIBBLE (*p
);
799 /* Re-decimalize. We have to do this often enough
800 * that we don't overflow, but once per nibble is
801 * overkill. Easier this way, though. Note that the
802 * carry is often larger than 10 (e.g. max initial
803 * carry out of lowest nibble is 15, could bubble all
804 * the way up greater than 10). So we have to do
805 * the carrying beyond the last current digit.
808 for (j
= 0; j
< decimal_len
- 1; j
++)
812 /* "/" won't handle an unsigned char with
813 * a value that if signed would be negative.
814 * So extend to longword int via "dummy".
817 carry
= CARRY_OUT (dummy
);
818 digits
[j
] = CARRY_LEFT (dummy
);
820 if (j
>= decimal_digits
&& carry
== 0)
823 * All higher digits are 0 and we
824 * no longer have a carry.
826 * Note: "j" is 0-based, "decimal_digits" is
829 decimal_digits
= j
+ 1;
835 /* Ok, now "digits" is the decimal representation, with
836 * the "decimal_digits" actual digits. Print!
838 for (i
= decimal_digits
- 1; i
>= 0; i
--)
840 fprintf_filtered (stream
, "%1d", digits
[i
]);
844 fputs_filtered (local_decimal_format_suffix (), stream
);
847 /* VALADDR points to an integer of LEN bytes. Print it in hex on stream. */
850 print_hex_chars (struct ui_file
*stream
, unsigned char *valaddr
, unsigned len
)
854 /* FIXME: We should be not printing leading zeroes in most cases. */
856 fputs_filtered (local_hex_format_prefix (), stream
);
857 if (TARGET_BYTE_ORDER
== BFD_ENDIAN_BIG
)
863 fprintf_filtered (stream
, "%02x", *p
);
868 for (p
= valaddr
+ len
- 1;
872 fprintf_filtered (stream
, "%02x", *p
);
875 fputs_filtered (local_hex_format_suffix (), stream
);
878 /* Called by various <lang>_val_print routines to print elements of an
879 array in the form "<elem1>, <elem2>, <elem3>, ...".
881 (FIXME?) Assumes array element separator is a comma, which is correct
882 for all languages currently handled.
883 (FIXME?) Some languages have a notation for repeated array elements,
884 perhaps we should try to use that notation when appropriate.
888 val_print_array_elements (struct type
*type
, char *valaddr
, CORE_ADDR address
,
889 struct ui_file
*stream
, int format
, int deref_ref
,
890 int recurse
, enum val_prettyprint pretty
,
893 unsigned int things_printed
= 0;
895 struct type
*elttype
;
897 /* Position of the array element we are examining to see
898 whether it is repeated. */
900 /* Number of repetitions we have detected so far. */
903 elttype
= TYPE_TARGET_TYPE (type
);
904 eltlen
= TYPE_LENGTH (check_typedef (elttype
));
905 len
= TYPE_LENGTH (type
) / eltlen
;
907 annotate_array_section_begin (i
, elttype
);
909 for (; i
< len
&& things_printed
< print_max
; i
++)
913 if (prettyprint_arrays
)
915 fprintf_filtered (stream
, ",\n");
916 print_spaces_filtered (2 + 2 * recurse
, stream
);
920 fprintf_filtered (stream
, ", ");
923 wrap_here (n_spaces (2 + 2 * recurse
));
927 while ((rep1
< len
) &&
928 !memcmp (valaddr
+ i
* eltlen
, valaddr
+ rep1
* eltlen
, eltlen
))
934 if (reps
> repeat_count_threshold
)
936 val_print (elttype
, valaddr
+ i
* eltlen
, 0, 0, stream
, format
,
937 deref_ref
, recurse
+ 1, pretty
);
938 annotate_elt_rep (reps
);
939 fprintf_filtered (stream
, " <repeats %u times>", reps
);
940 annotate_elt_rep_end ();
943 things_printed
+= repeat_count_threshold
;
947 val_print (elttype
, valaddr
+ i
* eltlen
, 0, 0, stream
, format
,
948 deref_ref
, recurse
+ 1, pretty
);
953 annotate_array_section_end ();
956 fprintf_filtered (stream
, "...");
960 /* Read LEN bytes of target memory at address MEMADDR, placing the
961 results in GDB's memory at MYADDR. Returns a count of the bytes
962 actually read, and optionally an errno value in the location
963 pointed to by ERRNOPTR if ERRNOPTR is non-null. */
965 /* FIXME: cagney/1999-10-14: Only used by val_print_string. Can this
966 function be eliminated. */
969 partial_memory_read (CORE_ADDR memaddr
, char *myaddr
, int len
, int *errnoptr
)
971 int nread
; /* Number of bytes actually read. */
972 int errcode
; /* Error from last read. */
974 /* First try a complete read. */
975 errcode
= target_read_memory (memaddr
, myaddr
, len
);
983 /* Loop, reading one byte at a time until we get as much as we can. */
984 for (errcode
= 0, nread
= 0; len
> 0 && errcode
== 0; nread
++, len
--)
986 errcode
= target_read_memory (memaddr
++, myaddr
++, 1);
988 /* If an error, the last read was unsuccessful, so adjust count. */
994 if (errnoptr
!= NULL
)
1001 /* Print a string from the inferior, starting at ADDR and printing up to LEN
1002 characters, of WIDTH bytes a piece, to STREAM. If LEN is -1, printing
1003 stops at the first null byte, otherwise printing proceeds (including null
1004 bytes) until either print_max or LEN characters have been printed,
1005 whichever is smaller. */
1007 /* FIXME: Use target_read_string. */
1010 val_print_string (CORE_ADDR addr
, int len
, int width
, struct ui_file
*stream
)
1012 int force_ellipsis
= 0; /* Force ellipsis to be printed if nonzero. */
1013 int errcode
; /* Errno returned from bad reads. */
1014 unsigned int fetchlimit
; /* Maximum number of chars to print. */
1015 unsigned int nfetch
; /* Chars to fetch / chars fetched. */
1016 unsigned int chunksize
; /* Size of each fetch, in chars. */
1017 char *buffer
= NULL
; /* Dynamically growable fetch buffer. */
1018 char *bufptr
; /* Pointer to next available byte in buffer. */
1019 char *limit
; /* First location past end of fetch buffer. */
1020 struct cleanup
*old_chain
= NULL
; /* Top of the old cleanup chain. */
1021 int found_nul
; /* Non-zero if we found the nul char */
1023 /* First we need to figure out the limit on the number of characters we are
1024 going to attempt to fetch and print. This is actually pretty simple. If
1025 LEN >= zero, then the limit is the minimum of LEN and print_max. If
1026 LEN is -1, then the limit is print_max. This is true regardless of
1027 whether print_max is zero, UINT_MAX (unlimited), or something in between,
1028 because finding the null byte (or available memory) is what actually
1029 limits the fetch. */
1031 fetchlimit
= (len
== -1 ? print_max
: min (len
, print_max
));
1033 /* Now decide how large of chunks to try to read in one operation. This
1034 is also pretty simple. If LEN >= zero, then we want fetchlimit chars,
1035 so we might as well read them all in one operation. If LEN is -1, we
1036 are looking for a null terminator to end the fetching, so we might as
1037 well read in blocks that are large enough to be efficient, but not so
1038 large as to be slow if fetchlimit happens to be large. So we choose the
1039 minimum of 8 and fetchlimit. We used to use 200 instead of 8 but
1040 200 is way too big for remote debugging over a serial line. */
1042 chunksize
= (len
== -1 ? min (8, fetchlimit
) : fetchlimit
);
1044 /* Loop until we either have all the characters to print, or we encounter
1045 some error, such as bumping into the end of the address space. */
1048 old_chain
= make_cleanup (null_cleanup
, 0);
1052 buffer
= (char *) xmalloc (len
* width
);
1054 old_chain
= make_cleanup (xfree
, buffer
);
1056 nfetch
= partial_memory_read (addr
, bufptr
, len
* width
, &errcode
)
1058 addr
+= nfetch
* width
;
1059 bufptr
+= nfetch
* width
;
1063 unsigned long bufsize
= 0;
1067 nfetch
= min (chunksize
, fetchlimit
- bufsize
);
1070 buffer
= (char *) xmalloc (nfetch
* width
);
1073 discard_cleanups (old_chain
);
1074 buffer
= (char *) xrealloc (buffer
, (nfetch
+ bufsize
) * width
);
1077 old_chain
= make_cleanup (xfree
, buffer
);
1078 bufptr
= buffer
+ bufsize
* width
;
1081 /* Read as much as we can. */
1082 nfetch
= partial_memory_read (addr
, bufptr
, nfetch
* width
, &errcode
)
1085 /* Scan this chunk for the null byte that terminates the string
1086 to print. If found, we don't need to fetch any more. Note
1087 that bufptr is explicitly left pointing at the next character
1088 after the null byte, or at the next character after the end of
1091 limit
= bufptr
+ nfetch
* width
;
1092 while (bufptr
< limit
)
1096 c
= extract_unsigned_integer (bufptr
, width
);
1101 /* We don't care about any error which happened after
1102 the NULL terminator. */
1109 while (errcode
== 0 /* no error */
1110 && bufptr
- buffer
< fetchlimit
* width
/* no overrun */
1111 && !found_nul
); /* haven't found nul yet */
1114 { /* length of string is really 0! */
1115 buffer
= bufptr
= NULL
;
1119 /* bufptr and addr now point immediately beyond the last byte which we
1120 consider part of the string (including a '\0' which ends the string). */
1122 /* We now have either successfully filled the buffer to fetchlimit, or
1123 terminated early due to an error or finding a null char when LEN is -1. */
1125 if (len
== -1 && !found_nul
)
1129 /* We didn't find a null terminator we were looking for. Attempt
1130 to peek at the next character. If not successful, or it is not
1131 a null byte, then force ellipsis to be printed. */
1133 peekbuf
= (char *) alloca (width
);
1135 if (target_read_memory (addr
, peekbuf
, width
) == 0
1136 && extract_unsigned_integer (peekbuf
, width
) != 0)
1139 else if ((len
>= 0 && errcode
!= 0) || (len
> (bufptr
- buffer
) / width
))
1141 /* Getting an error when we have a requested length, or fetching less
1142 than the number of characters actually requested, always make us
1149 /* If we get an error before fetching anything, don't print a string.
1150 But if we fetch something and then get an error, print the string
1151 and then the error message. */
1152 if (errcode
== 0 || bufptr
> buffer
)
1156 fputs_filtered (" ", stream
);
1158 LA_PRINT_STRING (stream
, buffer
, (bufptr
- buffer
) / width
, width
, force_ellipsis
);
1165 fprintf_filtered (stream
, " <Address ");
1166 print_address_numeric (addr
, 1, stream
);
1167 fprintf_filtered (stream
, " out of bounds>");
1171 fprintf_filtered (stream
, " <Error reading address ");
1172 print_address_numeric (addr
, 1, stream
);
1173 fprintf_filtered (stream
, ": %s>", safe_strerror (errcode
));
1177 do_cleanups (old_chain
);
1178 return ((bufptr
- buffer
) / width
);
1182 /* Validate an input or output radix setting, and make sure the user
1183 knows what they really did here. Radix setting is confusing, e.g.
1184 setting the input radix to "10" never changes it! */
1187 set_input_radix (char *args
, int from_tty
, struct cmd_list_element
*c
)
1189 set_input_radix_1 (from_tty
, input_radix
);
1193 set_input_radix_1 (int from_tty
, unsigned radix
)
1195 /* We don't currently disallow any input radix except 0 or 1, which don't
1196 make any mathematical sense. In theory, we can deal with any input
1197 radix greater than 1, even if we don't have unique digits for every
1198 value from 0 to radix-1, but in practice we lose on large radix values.
1199 We should either fix the lossage or restrict the radix range more.
1204 /* FIXME: cagney/2002-03-17: This needs to revert the bad radix
1206 error ("Nonsense input radix ``decimal %u''; input radix unchanged.",
1209 input_radix
= radix
;
1212 printf_filtered ("Input radix now set to decimal %u, hex %x, octal %o.\n",
1213 radix
, radix
, radix
);
1218 set_output_radix (char *args
, int from_tty
, struct cmd_list_element
*c
)
1220 set_output_radix_1 (from_tty
, output_radix
);
1224 set_output_radix_1 (int from_tty
, unsigned radix
)
1226 /* Validate the radix and disallow ones that we aren't prepared to
1227 handle correctly, leaving the radix unchanged. */
1231 output_format
= 'x'; /* hex */
1234 output_format
= 0; /* decimal */
1237 output_format
= 'o'; /* octal */
1240 /* FIXME: cagney/2002-03-17: This needs to revert the bad radix
1242 error ("Unsupported output radix ``decimal %u''; output radix unchanged.",
1245 output_radix
= radix
;
1248 printf_filtered ("Output radix now set to decimal %u, hex %x, octal %o.\n",
1249 radix
, radix
, radix
);
1253 /* Set both the input and output radix at once. Try to set the output radix
1254 first, since it has the most restrictive range. An radix that is valid as
1255 an output radix is also valid as an input radix.
1257 It may be useful to have an unusual input radix. If the user wishes to
1258 set an input radix that is not valid as an output radix, he needs to use
1259 the 'set input-radix' command. */
1262 set_radix (char *arg
, int from_tty
)
1266 radix
= (arg
== NULL
) ? 10 : parse_and_eval_long (arg
);
1267 set_output_radix_1 (0, radix
);
1268 set_input_radix_1 (0, radix
);
1271 printf_filtered ("Input and output radices now set to decimal %u, hex %x, octal %o.\n",
1272 radix
, radix
, radix
);
1276 /* Show both the input and output radices. */
1279 show_radix (char *arg
, int from_tty
)
1283 if (input_radix
== output_radix
)
1285 printf_filtered ("Input and output radices set to decimal %u, hex %x, octal %o.\n",
1286 input_radix
, input_radix
, input_radix
);
1290 printf_filtered ("Input radix set to decimal %u, hex %x, octal %o.\n",
1291 input_radix
, input_radix
, input_radix
);
1292 printf_filtered ("Output radix set to decimal %u, hex %x, octal %o.\n",
1293 output_radix
, output_radix
, output_radix
);
1300 set_print (char *arg
, int from_tty
)
1303 "\"set print\" must be followed by the name of a print subcommand.\n");
1304 help_list (setprintlist
, "set print ", -1, gdb_stdout
);
1308 show_print (char *args
, int from_tty
)
1310 cmd_show_list (showprintlist
, from_tty
, "");
1314 _initialize_valprint (void)
1316 struct cmd_list_element
*c
;
1318 add_prefix_cmd ("print", no_class
, set_print
,
1319 "Generic command for setting how things print.",
1320 &setprintlist
, "set print ", 0, &setlist
);
1321 add_alias_cmd ("p", "print", no_class
, 1, &setlist
);
1322 /* prefer set print to set prompt */
1323 add_alias_cmd ("pr", "print", no_class
, 1, &setlist
);
1325 add_prefix_cmd ("print", no_class
, show_print
,
1326 "Generic command for showing print settings.",
1327 &showprintlist
, "show print ", 0, &showlist
);
1328 add_alias_cmd ("p", "print", no_class
, 1, &showlist
);
1329 add_alias_cmd ("pr", "print", no_class
, 1, &showlist
);
1332 (add_set_cmd ("elements", no_class
, var_uinteger
, (char *) &print_max
,
1333 "Set limit on string chars or array elements to print.\n\
1334 \"set print elements 0\" causes there to be no limit.",
1339 (add_set_cmd ("null-stop", no_class
, var_boolean
,
1340 (char *) &stop_print_at_null
,
1341 "Set printing of char arrays to stop at first null char.",
1346 (add_set_cmd ("repeats", no_class
, var_uinteger
,
1347 (char *) &repeat_count_threshold
,
1348 "Set threshold for repeated print elements.\n\
1349 \"set print repeats 0\" causes all elements to be individually printed.",
1354 (add_set_cmd ("pretty", class_support
, var_boolean
,
1355 (char *) &prettyprint_structs
,
1356 "Set prettyprinting of structures.",
1361 (add_set_cmd ("union", class_support
, var_boolean
, (char *) &unionprint
,
1362 "Set printing of unions interior to structures.",
1367 (add_set_cmd ("array", class_support
, var_boolean
,
1368 (char *) &prettyprint_arrays
,
1369 "Set prettyprinting of arrays.",
1374 (add_set_cmd ("address", class_support
, var_boolean
, (char *) &addressprint
,
1375 "Set printing of addresses.",
1379 c
= add_set_cmd ("input-radix", class_support
, var_uinteger
,
1380 (char *) &input_radix
,
1381 "Set default input radix for entering numbers.",
1383 add_show_from_set (c
, &showlist
);
1384 set_cmd_sfunc (c
, set_input_radix
);
1386 c
= add_set_cmd ("output-radix", class_support
, var_uinteger
,
1387 (char *) &output_radix
,
1388 "Set default output radix for printing of values.",
1390 add_show_from_set (c
, &showlist
);
1391 set_cmd_sfunc (c
, set_output_radix
);
1393 /* The "set radix" and "show radix" commands are special in that they are
1394 like normal set and show commands but allow two normally independent
1395 variables to be either set or shown with a single command. So the
1396 usual add_set_cmd() and add_show_from_set() commands aren't really
1398 add_cmd ("radix", class_support
, set_radix
,
1399 "Set default input and output number radices.\n\
1400 Use 'set input-radix' or 'set output-radix' to independently set each.\n\
1401 Without an argument, sets both radices back to the default value of 10.",
1403 add_cmd ("radix", class_support
, show_radix
,
1404 "Show the default input and output number radices.\n\
1405 Use 'show input-radix' or 'show output-radix' to independently show each.",
1408 /* Give people the defaults which they are used to. */
1409 prettyprint_structs
= 0;
1410 prettyprint_arrays
= 0;
1413 print_max
= PRINT_MAX_DEFAULT
;
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