1 /* Print values for GDB, the GNU debugger.
2 Copyright 1986, 1988, 1989, 1991-1994, 1998, 2000
3 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 2 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, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
23 #include "gdb_string.h"
38 /* Prototypes for local functions */
40 static int partial_memory_read (CORE_ADDR memaddr
, char *myaddr
,
41 int len
, int *errnoptr
);
43 static void print_hex_chars (struct ui_file
*, unsigned char *,
46 static void show_print (char *, int);
48 static void set_print (char *, int);
50 static void set_radix (char *, int);
52 static void show_radix (char *, int);
54 static void set_input_radix (char *, int, struct cmd_list_element
*);
56 static void set_input_radix_1 (int, unsigned);
58 static void set_output_radix (char *, int, struct cmd_list_element
*);
60 static void set_output_radix_1 (int, unsigned);
62 void _initialize_valprint (void);
64 /* Maximum number of chars to print for a string pointer value or vector
65 contents, or UINT_MAX for no limit. Note that "set print elements 0"
66 stores UINT_MAX in print_max, which displays in a show command as
69 unsigned int print_max
;
70 #define PRINT_MAX_DEFAULT 200 /* Start print_max off at this value. */
72 /* Default input and output radixes, and output format letter. */
74 unsigned input_radix
= 10;
75 unsigned output_radix
= 10;
76 int output_format
= 0;
78 /* Print repeat counts if there are more than this many repetitions of an
79 element in an array. Referenced by the low level language dependent
82 unsigned int repeat_count_threshold
= 10;
84 /* If nonzero, stops printing of char arrays at first null. */
86 int stop_print_at_null
;
88 /* Controls pretty printing of structures. */
90 int prettyprint_structs
;
92 /* Controls pretty printing of arrays. */
94 int prettyprint_arrays
;
96 /* If nonzero, causes unions inside structures or other unions to be
99 int unionprint
; /* Controls printing of nested unions. */
101 /* If nonzero, causes machine addresses to be printed in certain contexts. */
103 int addressprint
; /* Controls printing of machine addresses */
106 /* Print data of type TYPE located at VALADDR (within GDB), which came from
107 the inferior at address ADDRESS, onto stdio stream STREAM according to
108 FORMAT (a letter, or 0 for natural format using TYPE).
110 If DEREF_REF is nonzero, then dereference references, otherwise just print
113 The PRETTY parameter controls prettyprinting.
115 If the data are a string pointer, returns the number of string characters
118 FIXME: The data at VALADDR is in target byte order. If gdb is ever
119 enhanced to be able to debug more than the single target it was compiled
120 for (specific CPU type and thus specific target byte ordering), then
121 either the print routines are going to have to take this into account,
122 or the data is going to have to be passed into here already converted
123 to the host byte ordering, whichever is more convenient. */
127 val_print (struct type
*type
, char *valaddr
, int embedded_offset
,
128 CORE_ADDR address
, struct ui_file
*stream
, int format
, int deref_ref
,
129 int recurse
, enum val_prettyprint pretty
)
131 struct type
*real_type
= check_typedef (type
);
132 if (pretty
== Val_pretty_default
)
134 pretty
= prettyprint_structs
? Val_prettyprint
: Val_no_prettyprint
;
139 /* Ensure that the type is complete and not just a stub. If the type is
140 only a stub and we can't find and substitute its complete type, then
141 print appropriate string and return. */
143 if (TYPE_FLAGS (real_type
) & TYPE_FLAG_STUB
)
145 fprintf_filtered (stream
, "<incomplete type>");
150 return (LA_VAL_PRINT (type
, valaddr
, embedded_offset
, address
,
151 stream
, format
, deref_ref
, recurse
, pretty
));
154 /* Print the value VAL in C-ish syntax on stream STREAM.
155 FORMAT is a format-letter, or 0 for print in natural format of data type.
156 If the object printed is a string pointer, returns
157 the number of string bytes printed. */
160 value_print (value_ptr val
, struct ui_file
*stream
, int format
,
161 enum val_prettyprint pretty
)
165 printf_filtered ("<address of value unknown>");
168 if (VALUE_OPTIMIZED_OUT (val
))
170 printf_filtered ("<value optimized out>");
173 return LA_VALUE_PRINT (val
, stream
, format
, pretty
);
176 /* Called by various <lang>_val_print routines to print
177 TYPE_CODE_INT's. TYPE is the type. VALADDR is the address of the
178 value. STREAM is where to print the value. */
181 val_print_type_code_int (struct type
*type
, char *valaddr
,
182 struct ui_file
*stream
)
184 if (TYPE_LENGTH (type
) > sizeof (LONGEST
))
188 if (TYPE_UNSIGNED (type
)
189 && extract_long_unsigned_integer (valaddr
, TYPE_LENGTH (type
),
192 print_longest (stream
, 'u', 0, val
);
196 /* Signed, or we couldn't turn an unsigned value into a
197 LONGEST. For signed values, one could assume two's
198 complement (a reasonable assumption, I think) and do
200 print_hex_chars (stream
, (unsigned char *) valaddr
,
206 #ifdef PRINT_TYPELESS_INTEGER
207 PRINT_TYPELESS_INTEGER (stream
, type
, unpack_long (type
, valaddr
));
209 print_longest (stream
, TYPE_UNSIGNED (type
) ? 'u' : 'd', 0,
210 unpack_long (type
, valaddr
));
215 /* Print a number according to FORMAT which is one of d,u,x,o,b,h,w,g.
216 The raison d'etre of this function is to consolidate printing of
217 LONG_LONG's into this one function. Some platforms have long longs but
218 don't have a printf() that supports "ll" in the format string. We handle
219 these by seeing if the number is representable as either a signed or
220 unsigned long, depending upon what format is desired, and if not we just
221 bail out and print the number in hex.
223 The format chars b,h,w,g are from print_scalar_formatted(). If USE_LOCAL,
224 format it according to the current language (this should be used for most
225 integers which GDB prints, the exception is things like protocols where
226 the format of the integer is a protocol thing, not a user-visible thing).
229 #if defined (CC_HAS_LONG_LONG) && !defined (PRINTF_HAS_LONG_LONG)
230 static void print_decimal (struct ui_file
* stream
, char *sign
,
231 int use_local
, ULONGEST val_ulong
);
233 print_decimal (struct ui_file
*stream
, char *sign
, int use_local
,
236 unsigned long temp
[3];
240 temp
[i
] = val_ulong
% (1000 * 1000 * 1000);
241 val_ulong
/= (1000 * 1000 * 1000);
244 while (val_ulong
!= 0 && i
< (sizeof (temp
) / sizeof (temp
[0])));
248 fprintf_filtered (stream
, "%s%lu",
252 fprintf_filtered (stream
, "%s%lu%09lu",
253 sign
, temp
[1], temp
[0]);
256 fprintf_filtered (stream
, "%s%lu%09lu%09lu",
257 sign
, temp
[2], temp
[1], temp
[0]);
267 print_longest (struct ui_file
*stream
, int format
, int use_local
,
270 #if defined (CC_HAS_LONG_LONG) && !defined (PRINTF_HAS_LONG_LONG)
271 if (sizeof (long) < sizeof (LONGEST
))
277 /* Print a signed value, that doesn't fit in a long */
278 if ((long) val_long
!= val_long
)
281 print_decimal (stream
, "-", use_local
, -val_long
);
283 print_decimal (stream
, "", use_local
, val_long
);
290 /* Print an unsigned value, that doesn't fit in a long */
291 if ((unsigned long) val_long
!= (ULONGEST
) val_long
)
293 print_decimal (stream
, "", use_local
, val_long
);
304 /* Print as unsigned value, must fit completely in unsigned long */
306 unsigned long temp
= val_long
;
307 if (temp
!= val_long
)
309 /* Urk, can't represent value in long so print in hex.
310 Do shift in two operations so that if sizeof (long)
311 == sizeof (LONGEST) we can avoid warnings from
312 picky compilers about shifts >= the size of the
314 unsigned long vbot
= (unsigned long) val_long
;
315 LONGEST temp
= (val_long
>> (sizeof (long) * HOST_CHAR_BIT
- 1));
316 unsigned long vtop
= temp
>> 1;
317 fprintf_filtered (stream
, "0x%lx%08lx", vtop
, vbot
);
326 #if defined (CC_HAS_LONG_LONG) && defined (PRINTF_HAS_LONG_LONG)
330 fprintf_filtered (stream
,
331 use_local
? local_decimal_format_custom ("ll")
336 fprintf_filtered (stream
, "%llu", val_long
);
339 fprintf_filtered (stream
,
340 use_local
? local_hex_format_custom ("ll")
345 fprintf_filtered (stream
,
346 use_local
? local_octal_format_custom ("ll")
351 fprintf_filtered (stream
, local_hex_format_custom ("02ll"), val_long
);
354 fprintf_filtered (stream
, local_hex_format_custom ("04ll"), val_long
);
357 fprintf_filtered (stream
, local_hex_format_custom ("08ll"), val_long
);
360 fprintf_filtered (stream
, local_hex_format_custom ("016ll"), val_long
);
365 #else /* !CC_HAS_LONG_LONG || !PRINTF_HAS_LONG_LONG */
366 /* In the following it is important to coerce (val_long) to a long. It does
367 nothing if !LONG_LONG, but it will chop off the top half (which we know
368 we can ignore) if the host supports long longs. */
373 fprintf_filtered (stream
,
374 use_local
? local_decimal_format_custom ("l")
379 fprintf_filtered (stream
, "%lu", (unsigned long) val_long
);
382 fprintf_filtered (stream
,
383 use_local
? local_hex_format_custom ("l")
385 (unsigned long) val_long
);
388 fprintf_filtered (stream
,
389 use_local
? local_octal_format_custom ("l")
391 (unsigned long) val_long
);
394 fprintf_filtered (stream
, local_hex_format_custom ("02l"),
395 (unsigned long) val_long
);
398 fprintf_filtered (stream
, local_hex_format_custom ("04l"),
399 (unsigned long) val_long
);
402 fprintf_filtered (stream
, local_hex_format_custom ("08l"),
403 (unsigned long) val_long
);
406 fprintf_filtered (stream
, local_hex_format_custom ("016l"),
407 (unsigned long) val_long
);
412 #endif /* CC_HAS_LONG_LONG || PRINTF_HAS_LONG_LONG */
417 strcat_longest (format
, use_local
, val_long
, buf
, buflen
)
422 int buflen
; /* ignored, for now */
424 #if defined (CC_HAS_LONG_LONG) && !defined (PRINTF_HAS_LONG_LONG)
427 vtop
= val_long
>> (sizeof (long) * HOST_CHAR_BIT
);
428 vbot
= (long) val_long
;
430 if ((format
== 'd' && (val_long
< INT_MIN
|| val_long
> INT_MAX
))
431 || ((format
== 'u' || format
== 'x') && (unsigned long long) val_long
> UINT_MAX
))
433 sprintf (buf
, "0x%lx%08lx", vtop
, vbot
);
438 #ifdef PRINTF_HAS_LONG_LONG
443 (use_local
? local_decimal_format_custom ("ll") : "%lld"),
447 sprintf (buf
, "%llu", val_long
);
451 (use_local
? local_hex_format_custom ("ll") : "%llx"),
457 (use_local
? local_octal_format_custom ("ll") : "%llo"),
461 sprintf (buf
, local_hex_format_custom ("02ll"), val_long
);
464 sprintf (buf
, local_hex_format_custom ("04ll"), val_long
);
467 sprintf (buf
, local_hex_format_custom ("08ll"), val_long
);
470 sprintf (buf
, local_hex_format_custom ("016ll"), val_long
);
475 #else /* !PRINTF_HAS_LONG_LONG */
476 /* In the following it is important to coerce (val_long) to a long. It does
477 nothing if !LONG_LONG, but it will chop off the top half (which we know
478 we can ignore) if the host supports long longs. */
483 sprintf (buf
, (use_local
? local_decimal_format_custom ("l") : "%ld"),
487 sprintf (buf
, "%lu", ((unsigned long) val_long
));
490 sprintf (buf
, (use_local
? local_hex_format_custom ("l") : "%lx"),
494 sprintf (buf
, (use_local
? local_octal_format_custom ("l") : "%lo"),
498 sprintf (buf
, local_hex_format_custom ("02l"),
502 sprintf (buf
, local_hex_format_custom ("04l"),
506 sprintf (buf
, local_hex_format_custom ("08l"),
510 sprintf (buf
, local_hex_format_custom ("016l"),
517 #endif /* !PRINTF_HAS_LONG_LONG */
521 /* This used to be a macro, but I don't think it is called often enough
522 to merit such treatment. */
523 /* Convert a LONGEST to an int. This is used in contexts (e.g. number of
524 arguments to a function, number in a value history, register number, etc.)
525 where the value must not be larger than can fit in an int. */
528 longest_to_int (LONGEST arg
)
530 /* Let the compiler do the work */
531 int rtnval
= (int) arg
;
533 /* Check for overflows or underflows */
534 if (sizeof (LONGEST
) > sizeof (int))
538 error ("Value out of range.");
545 /* Print a floating point value of type TYPE, pointed to in GDB by VALADDR,
549 print_floating (char *valaddr
, struct type
*type
, struct ui_file
*stream
)
553 unsigned len
= TYPE_LENGTH (type
);
555 /* Check for NaN's. Note that this code does not depend on us being
556 on an IEEE conforming system. It only depends on the target
557 machine using IEEE representation. This means (a)
558 cross-debugging works right, and (2) IEEE_FLOAT can (and should)
559 be non-zero for systems like the 68881, which uses IEEE
560 representation, but is not IEEE conforming. */
563 unsigned long low
, high
;
564 /* Is the sign bit 0? */
566 /* Is it is a NaN (i.e. the exponent is all ones and
567 the fraction is nonzero)? */
570 /* For lint, initialize these two variables to suppress warning: */
571 low
= high
= nonnegative
= 0;
574 /* It's single precision. */
575 /* Assume that floating point byte order is the same as
576 integer byte order. */
577 low
= extract_unsigned_integer (valaddr
, 4);
578 nonnegative
= ((low
& 0x80000000) == 0);
579 is_nan
= ((((low
>> 23) & 0xFF) == 0xFF)
580 && 0 != (low
& 0x7FFFFF));
586 /* It's double precision. Get the high and low words. */
588 /* Assume that floating point byte order is the same as
589 integer byte order. */
590 if (TARGET_BYTE_ORDER
== BIG_ENDIAN
)
592 low
= extract_unsigned_integer (valaddr
+ 4, 4);
593 high
= extract_unsigned_integer (valaddr
, 4);
597 low
= extract_unsigned_integer (valaddr
, 4);
598 high
= extract_unsigned_integer (valaddr
+ 4, 4);
600 nonnegative
= ((high
& 0x80000000) == 0);
601 is_nan
= (((high
>> 20) & 0x7ff) == 0x7ff
602 && !((((high
& 0xfffff) == 0)) && (low
== 0)));
607 #ifdef TARGET_ANALYZE_FLOATING
608 TARGET_ANALYZE_FLOATING
;
610 /* Extended. We can't detect extended NaNs for this target.
611 Also note that currently extendeds get nuked to double in
612 REGISTER_CONVERTIBLE. */
619 /* The meaning of the sign and fraction is not defined by IEEE.
620 But the user might know what they mean. For example, they
621 (in an implementation-defined manner) distinguish between
622 signaling and quiet NaN's. */
624 fprintf_filtered (stream
, "-NaN(0x%lx%.8lx)" + !!nonnegative
,
627 fprintf_filtered (stream
, "-NaN(0x%lx)" + nonnegative
, low
);
632 doub
= unpack_double (type
, valaddr
, &inv
);
635 fprintf_filtered (stream
, "<invalid float value>");
639 if (len
< sizeof (double))
640 fprintf_filtered (stream
, "%.9g", (double) doub
);
641 else if (len
== sizeof (double))
642 fprintf_filtered (stream
, "%.17g", (double) doub
);
644 #ifdef PRINTF_HAS_LONG_DOUBLE
645 fprintf_filtered (stream
, "%.35Lg", doub
);
647 /* This at least wins with values that are representable as doubles */
648 fprintf_filtered (stream
, "%.17g", (double) doub
);
653 print_binary_chars (struct ui_file
*stream
, unsigned char *valaddr
,
657 #define BITS_IN_BYTES 8
663 /* Declared "int" so it will be signed.
664 * This ensures that right shift will shift in zeros.
666 const int mask
= 0x080;
668 /* FIXME: We should be not printing leading zeroes in most cases. */
670 fprintf_filtered (stream
, local_binary_format_prefix ());
671 if (TARGET_BYTE_ORDER
== BIG_ENDIAN
)
677 /* Every byte has 8 binary characters; peel off
678 * and print from the MSB end.
680 for (i
= 0; i
< (BITS_IN_BYTES
* sizeof (*p
)); i
++)
682 if (*p
& (mask
>> i
))
687 fprintf_filtered (stream
, "%1d", b
);
693 for (p
= valaddr
+ len
- 1;
697 for (i
= 0; i
< (BITS_IN_BYTES
* sizeof (*p
)); i
++)
699 if (*p
& (mask
>> i
))
704 fprintf_filtered (stream
, "%1d", b
);
708 fprintf_filtered (stream
, local_binary_format_suffix ());
711 /* VALADDR points to an integer of LEN bytes.
712 * Print it in octal on stream or format it in buf.
715 print_octal_chars (struct ui_file
*stream
, unsigned char *valaddr
, unsigned len
)
718 unsigned char octa1
, octa2
, octa3
, carry
;
721 /* FIXME: We should be not printing leading zeroes in most cases. */
724 /* Octal is 3 bits, which doesn't fit. Yuk. So we have to track
725 * the extra bits, which cycle every three bytes:
729 * bit number 123 456 78 | 9 012 345 6 | 78 901 234 | 567 890 12 |
731 * Octal side: 0 1 carry 3 4 carry ...
733 * Cycle number: 0 1 2
735 * But of course we are printing from the high side, so we have to
736 * figure out where in the cycle we are so that we end up with no
737 * left over bits at the end.
739 #define BITS_IN_OCTAL 3
740 #define HIGH_ZERO 0340
741 #define LOW_ZERO 0016
742 #define CARRY_ZERO 0003
743 #define HIGH_ONE 0200
746 #define CARRY_ONE 0001
747 #define HIGH_TWO 0300
751 /* For 32 we start in cycle 2, with two bits and one bit carry;
752 * for 64 in cycle in cycle 1, with one bit and a two bit carry.
754 cycle
= (len
* BITS_IN_BYTES
) % BITS_IN_OCTAL
;
757 fprintf_filtered (stream
, local_octal_format_prefix ());
758 if (TARGET_BYTE_ORDER
== BIG_ENDIAN
)
767 /* No carry in, carry out two bits.
769 octa1
= (HIGH_ZERO
& *p
) >> 5;
770 octa2
= (LOW_ZERO
& *p
) >> 2;
771 carry
= (CARRY_ZERO
& *p
);
772 fprintf_filtered (stream
, "%o", octa1
);
773 fprintf_filtered (stream
, "%o", octa2
);
777 /* Carry in two bits, carry out one bit.
779 octa1
= (carry
<< 1) | ((HIGH_ONE
& *p
) >> 7);
780 octa2
= (MID_ONE
& *p
) >> 4;
781 octa3
= (LOW_ONE
& *p
) >> 1;
782 carry
= (CARRY_ONE
& *p
);
783 fprintf_filtered (stream
, "%o", octa1
);
784 fprintf_filtered (stream
, "%o", octa2
);
785 fprintf_filtered (stream
, "%o", octa3
);
789 /* Carry in one bit, no carry out.
791 octa1
= (carry
<< 2) | ((HIGH_TWO
& *p
) >> 6);
792 octa2
= (MID_TWO
& *p
) >> 3;
793 octa3
= (LOW_TWO
& *p
);
795 fprintf_filtered (stream
, "%o", octa1
);
796 fprintf_filtered (stream
, "%o", octa2
);
797 fprintf_filtered (stream
, "%o", octa3
);
801 error ("Internal error in octal conversion;");
805 cycle
= cycle
% BITS_IN_OCTAL
;
810 for (p
= valaddr
+ len
- 1;
817 /* Carry out, no carry in */
818 octa1
= (HIGH_ZERO
& *p
) >> 5;
819 octa2
= (LOW_ZERO
& *p
) >> 2;
820 carry
= (CARRY_ZERO
& *p
);
821 fprintf_filtered (stream
, "%o", octa1
);
822 fprintf_filtered (stream
, "%o", octa2
);
826 /* Carry in, carry out */
827 octa1
= (carry
<< 1) | ((HIGH_ONE
& *p
) >> 7);
828 octa2
= (MID_ONE
& *p
) >> 4;
829 octa3
= (LOW_ONE
& *p
) >> 1;
830 carry
= (CARRY_ONE
& *p
);
831 fprintf_filtered (stream
, "%o", octa1
);
832 fprintf_filtered (stream
, "%o", octa2
);
833 fprintf_filtered (stream
, "%o", octa3
);
837 /* Carry in, no carry out */
838 octa1
= (carry
<< 2) | ((HIGH_TWO
& *p
) >> 6);
839 octa2
= (MID_TWO
& *p
) >> 3;
840 octa3
= (LOW_TWO
& *p
);
842 fprintf_filtered (stream
, "%o", octa1
);
843 fprintf_filtered (stream
, "%o", octa2
);
844 fprintf_filtered (stream
, "%o", octa3
);
848 error ("Internal error in octal conversion;");
852 cycle
= cycle
% BITS_IN_OCTAL
;
856 fprintf_filtered (stream
, local_octal_format_suffix ());
859 /* VALADDR points to an integer of LEN bytes.
860 * Print it in decimal on stream or format it in buf.
863 print_decimal_chars (struct ui_file
*stream
, unsigned char *valaddr
,
867 #define TWO_TO_FOURTH 16
868 #define CARRY_OUT( x ) ((x) / TEN) /* extend char to int */
869 #define CARRY_LEFT( x ) ((x) % TEN)
870 #define SHIFT( x ) ((x) << 4)
872 ((TARGET_BYTE_ORDER == BIG_ENDIAN) ? valaddr : valaddr + len - 1)
874 ((TARGET_BYTE_ORDER == BIG_ENDIAN) ? (p < valaddr + len) : (p >= valaddr))
876 ((TARGET_BYTE_ORDER == BIG_ENDIAN) ? p++ : p-- )
877 #define LOW_NIBBLE( x ) ( (x) & 0x00F)
878 #define HIGH_NIBBLE( x ) (((x) & 0x0F0) >> 4)
881 unsigned char *digits
;
884 int i
, j
, decimal_digits
;
888 /* Base-ten number is less than twice as many digits
889 * as the base 16 number, which is 2 digits per byte.
891 decimal_len
= len
* 2 * 2;
892 digits
= (unsigned char *) malloc (decimal_len
);
894 error ("Can't allocate memory for conversion to decimal.");
896 for (i
= 0; i
< decimal_len
; i
++)
901 fprintf_filtered (stream
, local_decimal_format_prefix ());
903 /* Ok, we have an unknown number of bytes of data to be printed in
906 * Given a hex number (in nibbles) as XYZ, we start by taking X and
907 * decemalizing it as "x1 x2" in two decimal nibbles. Then we multiply
908 * the nibbles by 16, add Y and re-decimalize. Repeat with Z.
910 * The trick is that "digits" holds a base-10 number, but sometimes
911 * the individual digits are > 10.
913 * Outer loop is per nibble (hex digit) of input, from MSD end to
916 decimal_digits
= 0; /* Number of decimal digits so far */
922 * Multiply current base-ten number by 16 in place.
923 * Each digit was between 0 and 9, now is between
926 for (j
= 0; j
< decimal_digits
; j
++)
928 digits
[j
] = SHIFT (digits
[j
]);
931 /* Take the next nibble off the input and add it to what
932 * we've got in the LSB position. Bottom 'digit' is now
935 * "flip" is used to run this loop twice for each byte.
941 digits
[0] += HIGH_NIBBLE (*p
);
946 /* Take low nibble and bump our pointer "p".
948 digits
[0] += LOW_NIBBLE (*p
);
953 /* Re-decimalize. We have to do this often enough
954 * that we don't overflow, but once per nibble is
955 * overkill. Easier this way, though. Note that the
956 * carry is often larger than 10 (e.g. max initial
957 * carry out of lowest nibble is 15, could bubble all
958 * the way up greater than 10). So we have to do
959 * the carrying beyond the last current digit.
962 for (j
= 0; j
< decimal_len
- 1; j
++)
966 /* "/" won't handle an unsigned char with
967 * a value that if signed would be negative.
968 * So extend to longword int via "dummy".
971 carry
= CARRY_OUT (dummy
);
972 digits
[j
] = CARRY_LEFT (dummy
);
974 if (j
>= decimal_digits
&& carry
== 0)
977 * All higher digits are 0 and we
978 * no longer have a carry.
980 * Note: "j" is 0-based, "decimal_digits" is
983 decimal_digits
= j
+ 1;
989 /* Ok, now "digits" is the decimal representation, with
990 * the "decimal_digits" actual digits. Print!
992 for (i
= decimal_digits
- 1; i
>= 0; i
--)
994 fprintf_filtered (stream
, "%1d", digits
[i
]);
998 fprintf_filtered (stream
, local_decimal_format_suffix ());
1001 /* VALADDR points to an integer of LEN bytes. Print it in hex on stream. */
1004 print_hex_chars (struct ui_file
*stream
, unsigned char *valaddr
, unsigned len
)
1008 /* FIXME: We should be not printing leading zeroes in most cases. */
1010 fprintf_filtered (stream
, local_hex_format_prefix ());
1011 if (TARGET_BYTE_ORDER
== BIG_ENDIAN
)
1017 fprintf_filtered (stream
, "%02x", *p
);
1022 for (p
= valaddr
+ len
- 1;
1026 fprintf_filtered (stream
, "%02x", *p
);
1029 fprintf_filtered (stream
, local_hex_format_suffix ());
1032 /* Called by various <lang>_val_print routines to print elements of an
1033 array in the form "<elem1>, <elem2>, <elem3>, ...".
1035 (FIXME?) Assumes array element separator is a comma, which is correct
1036 for all languages currently handled.
1037 (FIXME?) Some languages have a notation for repeated array elements,
1038 perhaps we should try to use that notation when appropriate.
1042 val_print_array_elements (struct type
*type
, char *valaddr
, CORE_ADDR address
,
1043 struct ui_file
*stream
, int format
, int deref_ref
,
1044 int recurse
, enum val_prettyprint pretty
,
1047 unsigned int things_printed
= 0;
1049 struct type
*elttype
;
1051 /* Position of the array element we are examining to see
1052 whether it is repeated. */
1054 /* Number of repetitions we have detected so far. */
1057 elttype
= TYPE_TARGET_TYPE (type
);
1058 eltlen
= TYPE_LENGTH (check_typedef (elttype
));
1059 len
= TYPE_LENGTH (type
) / eltlen
;
1061 annotate_array_section_begin (i
, elttype
);
1063 for (; i
< len
&& things_printed
< print_max
; i
++)
1067 if (prettyprint_arrays
)
1069 fprintf_filtered (stream
, ",\n");
1070 print_spaces_filtered (2 + 2 * recurse
, stream
);
1074 fprintf_filtered (stream
, ", ");
1077 wrap_here (n_spaces (2 + 2 * recurse
));
1081 while ((rep1
< len
) &&
1082 !memcmp (valaddr
+ i
* eltlen
, valaddr
+ rep1
* eltlen
, eltlen
))
1088 if (reps
> repeat_count_threshold
)
1090 val_print (elttype
, valaddr
+ i
* eltlen
, 0, 0, stream
, format
,
1091 deref_ref
, recurse
+ 1, pretty
);
1092 annotate_elt_rep (reps
);
1093 fprintf_filtered (stream
, " <repeats %u times>", reps
);
1094 annotate_elt_rep_end ();
1097 things_printed
+= repeat_count_threshold
;
1101 val_print (elttype
, valaddr
+ i
* eltlen
, 0, 0, stream
, format
,
1102 deref_ref
, recurse
+ 1, pretty
);
1107 annotate_array_section_end ();
1110 fprintf_filtered (stream
, "...");
1114 /* Read LEN bytes of target memory at address MEMADDR, placing the
1115 results in GDB's memory at MYADDR. Returns a count of the bytes
1116 actually read, and optionally an errno value in the location
1117 pointed to by ERRNOPTR if ERRNOPTR is non-null. */
1119 /* FIXME: cagney/1999-10-14: Only used by val_print_string. Can this
1120 function be eliminated. */
1123 partial_memory_read (CORE_ADDR memaddr
, char *myaddr
, int len
, int *errnoptr
)
1125 int nread
; /* Number of bytes actually read. */
1126 int errcode
; /* Error from last read. */
1128 /* First try a complete read. */
1129 errcode
= target_read_memory (memaddr
, myaddr
, len
);
1137 /* Loop, reading one byte at a time until we get as much as we can. */
1138 for (errcode
= 0, nread
= 0; len
> 0 && errcode
== 0; nread
++, len
--)
1140 errcode
= target_read_memory (memaddr
++, myaddr
++, 1);
1142 /* If an error, the last read was unsuccessful, so adjust count. */
1148 if (errnoptr
!= NULL
)
1150 *errnoptr
= errcode
;
1155 /* Print a string from the inferior, starting at ADDR and printing up to LEN
1156 characters, of WIDTH bytes a piece, to STREAM. If LEN is -1, printing
1157 stops at the first null byte, otherwise printing proceeds (including null
1158 bytes) until either print_max or LEN characters have been printed,
1159 whichever is smaller. */
1161 /* FIXME: Use target_read_string. */
1164 val_print_string (CORE_ADDR addr
, int len
, int width
, struct ui_file
*stream
)
1166 int force_ellipsis
= 0; /* Force ellipsis to be printed if nonzero. */
1167 int errcode
; /* Errno returned from bad reads. */
1168 unsigned int fetchlimit
; /* Maximum number of chars to print. */
1169 unsigned int nfetch
; /* Chars to fetch / chars fetched. */
1170 unsigned int chunksize
; /* Size of each fetch, in chars. */
1171 char *buffer
= NULL
; /* Dynamically growable fetch buffer. */
1172 char *bufptr
; /* Pointer to next available byte in buffer. */
1173 char *limit
; /* First location past end of fetch buffer. */
1174 struct cleanup
*old_chain
= NULL
; /* Top of the old cleanup chain. */
1175 int found_nul
; /* Non-zero if we found the nul char */
1177 /* First we need to figure out the limit on the number of characters we are
1178 going to attempt to fetch and print. This is actually pretty simple. If
1179 LEN >= zero, then the limit is the minimum of LEN and print_max. If
1180 LEN is -1, then the limit is print_max. This is true regardless of
1181 whether print_max is zero, UINT_MAX (unlimited), or something in between,
1182 because finding the null byte (or available memory) is what actually
1183 limits the fetch. */
1185 fetchlimit
= (len
== -1 ? print_max
: min (len
, print_max
));
1187 /* Now decide how large of chunks to try to read in one operation. This
1188 is also pretty simple. If LEN >= zero, then we want fetchlimit chars,
1189 so we might as well read them all in one operation. If LEN is -1, we
1190 are looking for a null terminator to end the fetching, so we might as
1191 well read in blocks that are large enough to be efficient, but not so
1192 large as to be slow if fetchlimit happens to be large. So we choose the
1193 minimum of 8 and fetchlimit. We used to use 200 instead of 8 but
1194 200 is way too big for remote debugging over a serial line. */
1196 chunksize
= (len
== -1 ? min (8, fetchlimit
) : fetchlimit
);
1198 /* Loop until we either have all the characters to print, or we encounter
1199 some error, such as bumping into the end of the address space. */
1202 old_chain
= make_cleanup (null_cleanup
, 0);
1206 buffer
= (char *) xmalloc (len
* width
);
1208 old_chain
= make_cleanup (free
, buffer
);
1210 nfetch
= partial_memory_read (addr
, bufptr
, len
* width
, &errcode
)
1212 addr
+= nfetch
* width
;
1213 bufptr
+= nfetch
* width
;
1217 unsigned long bufsize
= 0;
1221 nfetch
= min (chunksize
, fetchlimit
- bufsize
);
1224 buffer
= (char *) xmalloc (nfetch
* width
);
1227 discard_cleanups (old_chain
);
1228 buffer
= (char *) xrealloc (buffer
, (nfetch
+ bufsize
) * width
);
1231 old_chain
= make_cleanup (free
, buffer
);
1232 bufptr
= buffer
+ bufsize
* width
;
1235 /* Read as much as we can. */
1236 nfetch
= partial_memory_read (addr
, bufptr
, nfetch
* width
, &errcode
)
1239 /* Scan this chunk for the null byte that terminates the string
1240 to print. If found, we don't need to fetch any more. Note
1241 that bufptr is explicitly left pointing at the next character
1242 after the null byte, or at the next character after the end of
1245 limit
= bufptr
+ nfetch
* width
;
1246 while (bufptr
< limit
)
1250 c
= extract_unsigned_integer (bufptr
, width
);
1255 /* We don't care about any error which happened after
1256 the NULL terminator. */
1263 while (errcode
== 0 /* no error */
1264 && bufptr
- buffer
< fetchlimit
* width
/* no overrun */
1265 && !found_nul
); /* haven't found nul yet */
1268 { /* length of string is really 0! */
1269 buffer
= bufptr
= NULL
;
1273 /* bufptr and addr now point immediately beyond the last byte which we
1274 consider part of the string (including a '\0' which ends the string). */
1276 /* We now have either successfully filled the buffer to fetchlimit, or
1277 terminated early due to an error or finding a null char when LEN is -1. */
1279 if (len
== -1 && !found_nul
)
1283 /* We didn't find a null terminator we were looking for. Attempt
1284 to peek at the next character. If not successful, or it is not
1285 a null byte, then force ellipsis to be printed. */
1287 peekbuf
= (char *) alloca (width
);
1289 if (target_read_memory (addr
, peekbuf
, width
) == 0
1290 && extract_unsigned_integer (peekbuf
, width
) != 0)
1293 else if ((len
>= 0 && errcode
!= 0) || (len
> (bufptr
- buffer
) / width
))
1295 /* Getting an error when we have a requested length, or fetching less
1296 than the number of characters actually requested, always make us
1303 /* If we get an error before fetching anything, don't print a string.
1304 But if we fetch something and then get an error, print the string
1305 and then the error message. */
1306 if (errcode
== 0 || bufptr
> buffer
)
1310 fputs_filtered (" ", stream
);
1312 LA_PRINT_STRING (stream
, buffer
, (bufptr
- buffer
) / width
, width
, force_ellipsis
);
1319 fprintf_filtered (stream
, " <Address ");
1320 print_address_numeric (addr
, 1, stream
);
1321 fprintf_filtered (stream
, " out of bounds>");
1325 fprintf_filtered (stream
, " <Error reading address ");
1326 print_address_numeric (addr
, 1, stream
);
1327 fprintf_filtered (stream
, ": %s>", safe_strerror (errcode
));
1331 do_cleanups (old_chain
);
1332 return ((bufptr
- buffer
) / width
);
1336 /* Validate an input or output radix setting, and make sure the user
1337 knows what they really did here. Radix setting is confusing, e.g.
1338 setting the input radix to "10" never changes it! */
1342 set_input_radix (char *args
, int from_tty
, struct cmd_list_element
*c
)
1344 set_input_radix_1 (from_tty
, *(unsigned *) c
->var
);
1349 set_input_radix_1 (int from_tty
, unsigned radix
)
1351 /* We don't currently disallow any input radix except 0 or 1, which don't
1352 make any mathematical sense. In theory, we can deal with any input
1353 radix greater than 1, even if we don't have unique digits for every
1354 value from 0 to radix-1, but in practice we lose on large radix values.
1355 We should either fix the lossage or restrict the radix range more.
1360 error ("Nonsense input radix ``decimal %u''; input radix unchanged.",
1363 input_radix
= radix
;
1366 printf_filtered ("Input radix now set to decimal %u, hex %x, octal %o.\n",
1367 radix
, radix
, radix
);
1373 set_output_radix (char *args
, int from_tty
, struct cmd_list_element
*c
)
1375 set_output_radix_1 (from_tty
, *(unsigned *) c
->var
);
1379 set_output_radix_1 (int from_tty
, unsigned radix
)
1381 /* Validate the radix and disallow ones that we aren't prepared to
1382 handle correctly, leaving the radix unchanged. */
1386 output_format
= 'x'; /* hex */
1389 output_format
= 0; /* decimal */
1392 output_format
= 'o'; /* octal */
1395 error ("Unsupported output radix ``decimal %u''; output radix unchanged.",
1398 output_radix
= radix
;
1401 printf_filtered ("Output radix now set to decimal %u, hex %x, octal %o.\n",
1402 radix
, radix
, radix
);
1406 /* Set both the input and output radix at once. Try to set the output radix
1407 first, since it has the most restrictive range. An radix that is valid as
1408 an output radix is also valid as an input radix.
1410 It may be useful to have an unusual input radix. If the user wishes to
1411 set an input radix that is not valid as an output radix, he needs to use
1412 the 'set input-radix' command. */
1415 set_radix (char *arg
, int from_tty
)
1419 radix
= (arg
== NULL
) ? 10 : parse_and_eval_address (arg
);
1420 set_output_radix_1 (0, radix
);
1421 set_input_radix_1 (0, radix
);
1424 printf_filtered ("Input and output radices now set to decimal %u, hex %x, octal %o.\n",
1425 radix
, radix
, radix
);
1429 /* Show both the input and output radices. */
1433 show_radix (char *arg
, int from_tty
)
1437 if (input_radix
== output_radix
)
1439 printf_filtered ("Input and output radices set to decimal %u, hex %x, octal %o.\n",
1440 input_radix
, input_radix
, input_radix
);
1444 printf_filtered ("Input radix set to decimal %u, hex %x, octal %o.\n",
1445 input_radix
, input_radix
, input_radix
);
1446 printf_filtered ("Output radix set to decimal %u, hex %x, octal %o.\n",
1447 output_radix
, output_radix
, output_radix
);
1455 set_print (char *arg
, int from_tty
)
1458 "\"set print\" must be followed by the name of a print subcommand.\n");
1459 help_list (setprintlist
, "set print ", -1, gdb_stdout
);
1464 show_print (char *args
, int from_tty
)
1466 cmd_show_list (showprintlist
, from_tty
, "");
1470 _initialize_valprint (void)
1472 struct cmd_list_element
*c
;
1474 add_prefix_cmd ("print", no_class
, set_print
,
1475 "Generic command for setting how things print.",
1476 &setprintlist
, "set print ", 0, &setlist
);
1477 add_alias_cmd ("p", "print", no_class
, 1, &setlist
);
1478 /* prefer set print to set prompt */
1479 add_alias_cmd ("pr", "print", no_class
, 1, &setlist
);
1481 add_prefix_cmd ("print", no_class
, show_print
,
1482 "Generic command for showing print settings.",
1483 &showprintlist
, "show print ", 0, &showlist
);
1484 add_alias_cmd ("p", "print", no_class
, 1, &showlist
);
1485 add_alias_cmd ("pr", "print", no_class
, 1, &showlist
);
1488 (add_set_cmd ("elements", no_class
, var_uinteger
, (char *) &print_max
,
1489 "Set limit on string chars or array elements to print.\n\
1490 \"set print elements 0\" causes there to be no limit.",
1495 (add_set_cmd ("null-stop", no_class
, var_boolean
,
1496 (char *) &stop_print_at_null
,
1497 "Set printing of char arrays to stop at first null char.",
1502 (add_set_cmd ("repeats", no_class
, var_uinteger
,
1503 (char *) &repeat_count_threshold
,
1504 "Set threshold for repeated print elements.\n\
1505 \"set print repeats 0\" causes all elements to be individually printed.",
1510 (add_set_cmd ("pretty", class_support
, var_boolean
,
1511 (char *) &prettyprint_structs
,
1512 "Set prettyprinting of structures.",
1517 (add_set_cmd ("union", class_support
, var_boolean
, (char *) &unionprint
,
1518 "Set printing of unions interior to structures.",
1523 (add_set_cmd ("array", class_support
, var_boolean
,
1524 (char *) &prettyprint_arrays
,
1525 "Set prettyprinting of arrays.",
1530 (add_set_cmd ("address", class_support
, var_boolean
, (char *) &addressprint
,
1531 "Set printing of addresses.",
1535 c
= add_set_cmd ("input-radix", class_support
, var_uinteger
,
1536 (char *) &input_radix
,
1537 "Set default input radix for entering numbers.",
1539 add_show_from_set (c
, &showlist
);
1540 c
->function
.sfunc
= set_input_radix
;
1542 c
= add_set_cmd ("output-radix", class_support
, var_uinteger
,
1543 (char *) &output_radix
,
1544 "Set default output radix for printing of values.",
1546 add_show_from_set (c
, &showlist
);
1547 c
->function
.sfunc
= set_output_radix
;
1549 /* The "set radix" and "show radix" commands are special in that they are
1550 like normal set and show commands but allow two normally independent
1551 variables to be either set or shown with a single command. So the
1552 usual add_set_cmd() and add_show_from_set() commands aren't really
1554 add_cmd ("radix", class_support
, set_radix
,
1555 "Set default input and output number radices.\n\
1556 Use 'set input-radix' or 'set output-radix' to independently set each.\n\
1557 Without an argument, sets both radices back to the default value of 10.",
1559 add_cmd ("radix", class_support
, show_radix
,
1560 "Show the default input and output number radices.\n\
1561 Use 'show input-radix' or 'show output-radix' to independently show each.",
1564 /* Give people the defaults which they are used to. */
1565 prettyprint_structs
= 0;
1566 prettyprint_arrays
= 0;
1569 print_max
= PRINT_MAX_DEFAULT
;
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